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c66ac9db NB |
1 | /******************************************************************************* |
2 | * Filename: target_core_transport.c | |
3 | * | |
4 | * This file contains the Generic Target Engine Core. | |
5 | * | |
6 | * Copyright (c) 2002, 2003, 2004, 2005 PyX Technologies, Inc. | |
7 | * Copyright (c) 2005, 2006, 2007 SBE, Inc. | |
8 | * Copyright (c) 2007-2010 Rising Tide Systems | |
9 | * Copyright (c) 2008-2010 Linux-iSCSI.org | |
10 | * | |
11 | * Nicholas A. Bellinger <nab@kernel.org> | |
12 | * | |
13 | * This program is free software; you can redistribute it and/or modify | |
14 | * it under the terms of the GNU General Public License as published by | |
15 | * the Free Software Foundation; either version 2 of the License, or | |
16 | * (at your option) any later version. | |
17 | * | |
18 | * This program is distributed in the hope that it will be useful, | |
19 | * but WITHOUT ANY WARRANTY; without even the implied warranty of | |
20 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
21 | * GNU General Public License for more details. | |
22 | * | |
23 | * You should have received a copy of the GNU General Public License | |
24 | * along with this program; if not, write to the Free Software | |
25 | * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. | |
26 | * | |
27 | ******************************************************************************/ | |
28 | ||
29 | #include <linux/version.h> | |
30 | #include <linux/net.h> | |
31 | #include <linux/delay.h> | |
32 | #include <linux/string.h> | |
33 | #include <linux/timer.h> | |
34 | #include <linux/slab.h> | |
35 | #include <linux/blkdev.h> | |
36 | #include <linux/spinlock.h> | |
c66ac9db NB |
37 | #include <linux/kthread.h> |
38 | #include <linux/in.h> | |
39 | #include <linux/cdrom.h> | |
40 | #include <asm/unaligned.h> | |
41 | #include <net/sock.h> | |
42 | #include <net/tcp.h> | |
43 | #include <scsi/scsi.h> | |
44 | #include <scsi/scsi_cmnd.h> | |
e66ecd50 | 45 | #include <scsi/scsi_tcq.h> |
c66ac9db NB |
46 | |
47 | #include <target/target_core_base.h> | |
48 | #include <target/target_core_device.h> | |
49 | #include <target/target_core_tmr.h> | |
50 | #include <target/target_core_tpg.h> | |
51 | #include <target/target_core_transport.h> | |
52 | #include <target/target_core_fabric_ops.h> | |
53 | #include <target/target_core_configfs.h> | |
54 | ||
55 | #include "target_core_alua.h" | |
56 | #include "target_core_hba.h" | |
57 | #include "target_core_pr.h" | |
58 | #include "target_core_scdb.h" | |
59 | #include "target_core_ua.h" | |
60 | ||
61 | /* #define DEBUG_CDB_HANDLER */ | |
62 | #ifdef DEBUG_CDB_HANDLER | |
63 | #define DEBUG_CDB_H(x...) printk(KERN_INFO x) | |
64 | #else | |
65 | #define DEBUG_CDB_H(x...) | |
66 | #endif | |
67 | ||
68 | /* #define DEBUG_CMD_MAP */ | |
69 | #ifdef DEBUG_CMD_MAP | |
70 | #define DEBUG_CMD_M(x...) printk(KERN_INFO x) | |
71 | #else | |
72 | #define DEBUG_CMD_M(x...) | |
73 | #endif | |
74 | ||
75 | /* #define DEBUG_MEM_ALLOC */ | |
76 | #ifdef DEBUG_MEM_ALLOC | |
77 | #define DEBUG_MEM(x...) printk(KERN_INFO x) | |
78 | #else | |
79 | #define DEBUG_MEM(x...) | |
80 | #endif | |
81 | ||
82 | /* #define DEBUG_MEM2_ALLOC */ | |
83 | #ifdef DEBUG_MEM2_ALLOC | |
84 | #define DEBUG_MEM2(x...) printk(KERN_INFO x) | |
85 | #else | |
86 | #define DEBUG_MEM2(x...) | |
87 | #endif | |
88 | ||
89 | /* #define DEBUG_SG_CALC */ | |
90 | #ifdef DEBUG_SG_CALC | |
91 | #define DEBUG_SC(x...) printk(KERN_INFO x) | |
92 | #else | |
93 | #define DEBUG_SC(x...) | |
94 | #endif | |
95 | ||
96 | /* #define DEBUG_SE_OBJ */ | |
97 | #ifdef DEBUG_SE_OBJ | |
98 | #define DEBUG_SO(x...) printk(KERN_INFO x) | |
99 | #else | |
100 | #define DEBUG_SO(x...) | |
101 | #endif | |
102 | ||
103 | /* #define DEBUG_CMD_VOL */ | |
104 | #ifdef DEBUG_CMD_VOL | |
105 | #define DEBUG_VOL(x...) printk(KERN_INFO x) | |
106 | #else | |
107 | #define DEBUG_VOL(x...) | |
108 | #endif | |
109 | ||
110 | /* #define DEBUG_CMD_STOP */ | |
111 | #ifdef DEBUG_CMD_STOP | |
112 | #define DEBUG_CS(x...) printk(KERN_INFO x) | |
113 | #else | |
114 | #define DEBUG_CS(x...) | |
115 | #endif | |
116 | ||
117 | /* #define DEBUG_PASSTHROUGH */ | |
118 | #ifdef DEBUG_PASSTHROUGH | |
119 | #define DEBUG_PT(x...) printk(KERN_INFO x) | |
120 | #else | |
121 | #define DEBUG_PT(x...) | |
122 | #endif | |
123 | ||
124 | /* #define DEBUG_TASK_STOP */ | |
125 | #ifdef DEBUG_TASK_STOP | |
126 | #define DEBUG_TS(x...) printk(KERN_INFO x) | |
127 | #else | |
128 | #define DEBUG_TS(x...) | |
129 | #endif | |
130 | ||
131 | /* #define DEBUG_TRANSPORT_STOP */ | |
132 | #ifdef DEBUG_TRANSPORT_STOP | |
133 | #define DEBUG_TRANSPORT_S(x...) printk(KERN_INFO x) | |
134 | #else | |
135 | #define DEBUG_TRANSPORT_S(x...) | |
136 | #endif | |
137 | ||
138 | /* #define DEBUG_TASK_FAILURE */ | |
139 | #ifdef DEBUG_TASK_FAILURE | |
140 | #define DEBUG_TF(x...) printk(KERN_INFO x) | |
141 | #else | |
142 | #define DEBUG_TF(x...) | |
143 | #endif | |
144 | ||
145 | /* #define DEBUG_DEV_OFFLINE */ | |
146 | #ifdef DEBUG_DEV_OFFLINE | |
147 | #define DEBUG_DO(x...) printk(KERN_INFO x) | |
148 | #else | |
149 | #define DEBUG_DO(x...) | |
150 | #endif | |
151 | ||
152 | /* #define DEBUG_TASK_STATE */ | |
153 | #ifdef DEBUG_TASK_STATE | |
154 | #define DEBUG_TSTATE(x...) printk(KERN_INFO x) | |
155 | #else | |
156 | #define DEBUG_TSTATE(x...) | |
157 | #endif | |
158 | ||
159 | /* #define DEBUG_STATUS_THR */ | |
160 | #ifdef DEBUG_STATUS_THR | |
161 | #define DEBUG_ST(x...) printk(KERN_INFO x) | |
162 | #else | |
163 | #define DEBUG_ST(x...) | |
164 | #endif | |
165 | ||
166 | /* #define DEBUG_TASK_TIMEOUT */ | |
167 | #ifdef DEBUG_TASK_TIMEOUT | |
168 | #define DEBUG_TT(x...) printk(KERN_INFO x) | |
169 | #else | |
170 | #define DEBUG_TT(x...) | |
171 | #endif | |
172 | ||
173 | /* #define DEBUG_GENERIC_REQUEST_FAILURE */ | |
174 | #ifdef DEBUG_GENERIC_REQUEST_FAILURE | |
175 | #define DEBUG_GRF(x...) printk(KERN_INFO x) | |
176 | #else | |
177 | #define DEBUG_GRF(x...) | |
178 | #endif | |
179 | ||
180 | /* #define DEBUG_SAM_TASK_ATTRS */ | |
181 | #ifdef DEBUG_SAM_TASK_ATTRS | |
182 | #define DEBUG_STA(x...) printk(KERN_INFO x) | |
183 | #else | |
184 | #define DEBUG_STA(x...) | |
185 | #endif | |
186 | ||
e3d6f909 | 187 | static int sub_api_initialized; |
c66ac9db NB |
188 | |
189 | static struct kmem_cache *se_cmd_cache; | |
190 | static struct kmem_cache *se_sess_cache; | |
191 | struct kmem_cache *se_tmr_req_cache; | |
192 | struct kmem_cache *se_ua_cache; | |
193 | struct kmem_cache *se_mem_cache; | |
194 | struct kmem_cache *t10_pr_reg_cache; | |
195 | struct kmem_cache *t10_alua_lu_gp_cache; | |
196 | struct kmem_cache *t10_alua_lu_gp_mem_cache; | |
197 | struct kmem_cache *t10_alua_tg_pt_gp_cache; | |
198 | struct kmem_cache *t10_alua_tg_pt_gp_mem_cache; | |
199 | ||
200 | /* Used for transport_dev_get_map_*() */ | |
201 | typedef int (*map_func_t)(struct se_task *, u32); | |
202 | ||
203 | static int transport_generic_write_pending(struct se_cmd *); | |
204 | static int transport_processing_thread(void *); | |
205 | static int __transport_execute_tasks(struct se_device *dev); | |
206 | static void transport_complete_task_attr(struct se_cmd *cmd); | |
207 | static void transport_direct_request_timeout(struct se_cmd *cmd); | |
208 | static void transport_free_dev_tasks(struct se_cmd *cmd); | |
209 | static u32 transport_generic_get_cdb_count(struct se_cmd *cmd, | |
210 | unsigned long long starting_lba, u32 sectors, | |
211 | enum dma_data_direction data_direction, | |
212 | struct list_head *mem_list, int set_counts); | |
213 | static int transport_generic_get_mem(struct se_cmd *cmd, u32 length, | |
214 | u32 dma_size); | |
215 | static int transport_generic_remove(struct se_cmd *cmd, | |
216 | int release_to_pool, int session_reinstatement); | |
217 | static int transport_get_sectors(struct se_cmd *cmd); | |
218 | static struct list_head *transport_init_se_mem_list(void); | |
219 | static int transport_map_sg_to_mem(struct se_cmd *cmd, | |
220 | struct list_head *se_mem_list, void *in_mem, | |
221 | u32 *se_mem_cnt); | |
222 | static void transport_memcpy_se_mem_read_contig(struct se_cmd *cmd, | |
223 | unsigned char *dst, struct list_head *se_mem_list); | |
224 | static void transport_release_fe_cmd(struct se_cmd *cmd); | |
225 | static void transport_remove_cmd_from_queue(struct se_cmd *cmd, | |
226 | struct se_queue_obj *qobj); | |
227 | static int transport_set_sense_codes(struct se_cmd *cmd, u8 asc, u8 ascq); | |
228 | static void transport_stop_all_task_timers(struct se_cmd *cmd); | |
229 | ||
e3d6f909 | 230 | int init_se_kmem_caches(void) |
c66ac9db | 231 | { |
c66ac9db NB |
232 | se_cmd_cache = kmem_cache_create("se_cmd_cache", |
233 | sizeof(struct se_cmd), __alignof__(struct se_cmd), 0, NULL); | |
234 | if (!(se_cmd_cache)) { | |
235 | printk(KERN_ERR "kmem_cache_create for struct se_cmd failed\n"); | |
236 | goto out; | |
237 | } | |
238 | se_tmr_req_cache = kmem_cache_create("se_tmr_cache", | |
239 | sizeof(struct se_tmr_req), __alignof__(struct se_tmr_req), | |
240 | 0, NULL); | |
241 | if (!(se_tmr_req_cache)) { | |
242 | printk(KERN_ERR "kmem_cache_create() for struct se_tmr_req" | |
243 | " failed\n"); | |
244 | goto out; | |
245 | } | |
246 | se_sess_cache = kmem_cache_create("se_sess_cache", | |
247 | sizeof(struct se_session), __alignof__(struct se_session), | |
248 | 0, NULL); | |
249 | if (!(se_sess_cache)) { | |
250 | printk(KERN_ERR "kmem_cache_create() for struct se_session" | |
251 | " failed\n"); | |
252 | goto out; | |
253 | } | |
254 | se_ua_cache = kmem_cache_create("se_ua_cache", | |
255 | sizeof(struct se_ua), __alignof__(struct se_ua), | |
256 | 0, NULL); | |
257 | if (!(se_ua_cache)) { | |
258 | printk(KERN_ERR "kmem_cache_create() for struct se_ua failed\n"); | |
259 | goto out; | |
260 | } | |
261 | se_mem_cache = kmem_cache_create("se_mem_cache", | |
262 | sizeof(struct se_mem), __alignof__(struct se_mem), 0, NULL); | |
263 | if (!(se_mem_cache)) { | |
264 | printk(KERN_ERR "kmem_cache_create() for struct se_mem failed\n"); | |
265 | goto out; | |
266 | } | |
267 | t10_pr_reg_cache = kmem_cache_create("t10_pr_reg_cache", | |
268 | sizeof(struct t10_pr_registration), | |
269 | __alignof__(struct t10_pr_registration), 0, NULL); | |
270 | if (!(t10_pr_reg_cache)) { | |
271 | printk(KERN_ERR "kmem_cache_create() for struct t10_pr_registration" | |
272 | " failed\n"); | |
273 | goto out; | |
274 | } | |
275 | t10_alua_lu_gp_cache = kmem_cache_create("t10_alua_lu_gp_cache", | |
276 | sizeof(struct t10_alua_lu_gp), __alignof__(struct t10_alua_lu_gp), | |
277 | 0, NULL); | |
278 | if (!(t10_alua_lu_gp_cache)) { | |
279 | printk(KERN_ERR "kmem_cache_create() for t10_alua_lu_gp_cache" | |
280 | " failed\n"); | |
281 | goto out; | |
282 | } | |
283 | t10_alua_lu_gp_mem_cache = kmem_cache_create("t10_alua_lu_gp_mem_cache", | |
284 | sizeof(struct t10_alua_lu_gp_member), | |
285 | __alignof__(struct t10_alua_lu_gp_member), 0, NULL); | |
286 | if (!(t10_alua_lu_gp_mem_cache)) { | |
287 | printk(KERN_ERR "kmem_cache_create() for t10_alua_lu_gp_mem_" | |
288 | "cache failed\n"); | |
289 | goto out; | |
290 | } | |
291 | t10_alua_tg_pt_gp_cache = kmem_cache_create("t10_alua_tg_pt_gp_cache", | |
292 | sizeof(struct t10_alua_tg_pt_gp), | |
293 | __alignof__(struct t10_alua_tg_pt_gp), 0, NULL); | |
294 | if (!(t10_alua_tg_pt_gp_cache)) { | |
295 | printk(KERN_ERR "kmem_cache_create() for t10_alua_tg_pt_gp_" | |
296 | "cache failed\n"); | |
297 | goto out; | |
298 | } | |
299 | t10_alua_tg_pt_gp_mem_cache = kmem_cache_create( | |
300 | "t10_alua_tg_pt_gp_mem_cache", | |
301 | sizeof(struct t10_alua_tg_pt_gp_member), | |
302 | __alignof__(struct t10_alua_tg_pt_gp_member), | |
303 | 0, NULL); | |
304 | if (!(t10_alua_tg_pt_gp_mem_cache)) { | |
305 | printk(KERN_ERR "kmem_cache_create() for t10_alua_tg_pt_gp_" | |
306 | "mem_t failed\n"); | |
307 | goto out; | |
308 | } | |
309 | ||
c66ac9db NB |
310 | return 0; |
311 | out: | |
312 | if (se_cmd_cache) | |
313 | kmem_cache_destroy(se_cmd_cache); | |
314 | if (se_tmr_req_cache) | |
315 | kmem_cache_destroy(se_tmr_req_cache); | |
316 | if (se_sess_cache) | |
317 | kmem_cache_destroy(se_sess_cache); | |
318 | if (se_ua_cache) | |
319 | kmem_cache_destroy(se_ua_cache); | |
320 | if (se_mem_cache) | |
321 | kmem_cache_destroy(se_mem_cache); | |
322 | if (t10_pr_reg_cache) | |
323 | kmem_cache_destroy(t10_pr_reg_cache); | |
324 | if (t10_alua_lu_gp_cache) | |
325 | kmem_cache_destroy(t10_alua_lu_gp_cache); | |
326 | if (t10_alua_lu_gp_mem_cache) | |
327 | kmem_cache_destroy(t10_alua_lu_gp_mem_cache); | |
328 | if (t10_alua_tg_pt_gp_cache) | |
329 | kmem_cache_destroy(t10_alua_tg_pt_gp_cache); | |
330 | if (t10_alua_tg_pt_gp_mem_cache) | |
331 | kmem_cache_destroy(t10_alua_tg_pt_gp_mem_cache); | |
e3d6f909 | 332 | return -ENOMEM; |
c66ac9db NB |
333 | } |
334 | ||
e3d6f909 | 335 | void release_se_kmem_caches(void) |
c66ac9db | 336 | { |
c66ac9db NB |
337 | kmem_cache_destroy(se_cmd_cache); |
338 | kmem_cache_destroy(se_tmr_req_cache); | |
339 | kmem_cache_destroy(se_sess_cache); | |
340 | kmem_cache_destroy(se_ua_cache); | |
341 | kmem_cache_destroy(se_mem_cache); | |
342 | kmem_cache_destroy(t10_pr_reg_cache); | |
343 | kmem_cache_destroy(t10_alua_lu_gp_cache); | |
344 | kmem_cache_destroy(t10_alua_lu_gp_mem_cache); | |
345 | kmem_cache_destroy(t10_alua_tg_pt_gp_cache); | |
346 | kmem_cache_destroy(t10_alua_tg_pt_gp_mem_cache); | |
c66ac9db NB |
347 | } |
348 | ||
e3d6f909 AG |
349 | /* This code ensures unique mib indexes are handed out. */ |
350 | static DEFINE_SPINLOCK(scsi_mib_index_lock); | |
351 | static u32 scsi_mib_index[SCSI_INDEX_TYPE_MAX]; | |
e89d15ee NB |
352 | |
353 | /* | |
354 | * Allocate a new row index for the entry type specified | |
355 | */ | |
356 | u32 scsi_get_new_index(scsi_index_t type) | |
357 | { | |
358 | u32 new_index; | |
359 | ||
e3d6f909 | 360 | BUG_ON((type < 0) || (type >= SCSI_INDEX_TYPE_MAX)); |
e89d15ee | 361 | |
e3d6f909 AG |
362 | spin_lock(&scsi_mib_index_lock); |
363 | new_index = ++scsi_mib_index[type]; | |
364 | spin_unlock(&scsi_mib_index_lock); | |
e89d15ee NB |
365 | |
366 | return new_index; | |
367 | } | |
368 | ||
c66ac9db NB |
369 | void transport_init_queue_obj(struct se_queue_obj *qobj) |
370 | { | |
371 | atomic_set(&qobj->queue_cnt, 0); | |
372 | INIT_LIST_HEAD(&qobj->qobj_list); | |
373 | init_waitqueue_head(&qobj->thread_wq); | |
374 | spin_lock_init(&qobj->cmd_queue_lock); | |
375 | } | |
376 | EXPORT_SYMBOL(transport_init_queue_obj); | |
377 | ||
378 | static int transport_subsystem_reqmods(void) | |
379 | { | |
380 | int ret; | |
381 | ||
382 | ret = request_module("target_core_iblock"); | |
383 | if (ret != 0) | |
384 | printk(KERN_ERR "Unable to load target_core_iblock\n"); | |
385 | ||
386 | ret = request_module("target_core_file"); | |
387 | if (ret != 0) | |
388 | printk(KERN_ERR "Unable to load target_core_file\n"); | |
389 | ||
390 | ret = request_module("target_core_pscsi"); | |
391 | if (ret != 0) | |
392 | printk(KERN_ERR "Unable to load target_core_pscsi\n"); | |
393 | ||
394 | ret = request_module("target_core_stgt"); | |
395 | if (ret != 0) | |
396 | printk(KERN_ERR "Unable to load target_core_stgt\n"); | |
397 | ||
398 | return 0; | |
399 | } | |
400 | ||
401 | int transport_subsystem_check_init(void) | |
402 | { | |
e3d6f909 AG |
403 | int ret; |
404 | ||
405 | if (sub_api_initialized) | |
c66ac9db NB |
406 | return 0; |
407 | /* | |
408 | * Request the loading of known TCM subsystem plugins.. | |
409 | */ | |
e3d6f909 AG |
410 | ret = transport_subsystem_reqmods(); |
411 | if (ret < 0) | |
412 | return ret; | |
c66ac9db | 413 | |
e3d6f909 | 414 | sub_api_initialized = 1; |
c66ac9db NB |
415 | return 0; |
416 | } | |
417 | ||
418 | struct se_session *transport_init_session(void) | |
419 | { | |
420 | struct se_session *se_sess; | |
421 | ||
422 | se_sess = kmem_cache_zalloc(se_sess_cache, GFP_KERNEL); | |
423 | if (!(se_sess)) { | |
424 | printk(KERN_ERR "Unable to allocate struct se_session from" | |
425 | " se_sess_cache\n"); | |
426 | return ERR_PTR(-ENOMEM); | |
427 | } | |
428 | INIT_LIST_HEAD(&se_sess->sess_list); | |
429 | INIT_LIST_HEAD(&se_sess->sess_acl_list); | |
c66ac9db NB |
430 | |
431 | return se_sess; | |
432 | } | |
433 | EXPORT_SYMBOL(transport_init_session); | |
434 | ||
435 | /* | |
436 | * Called with spin_lock_bh(&struct se_portal_group->session_lock called. | |
437 | */ | |
438 | void __transport_register_session( | |
439 | struct se_portal_group *se_tpg, | |
440 | struct se_node_acl *se_nacl, | |
441 | struct se_session *se_sess, | |
442 | void *fabric_sess_ptr) | |
443 | { | |
444 | unsigned char buf[PR_REG_ISID_LEN]; | |
445 | ||
446 | se_sess->se_tpg = se_tpg; | |
447 | se_sess->fabric_sess_ptr = fabric_sess_ptr; | |
448 | /* | |
449 | * Used by struct se_node_acl's under ConfigFS to locate active se_session-t | |
450 | * | |
451 | * Only set for struct se_session's that will actually be moving I/O. | |
452 | * eg: *NOT* discovery sessions. | |
453 | */ | |
454 | if (se_nacl) { | |
455 | /* | |
456 | * If the fabric module supports an ISID based TransportID, | |
457 | * save this value in binary from the fabric I_T Nexus now. | |
458 | */ | |
e3d6f909 | 459 | if (se_tpg->se_tpg_tfo->sess_get_initiator_sid != NULL) { |
c66ac9db | 460 | memset(&buf[0], 0, PR_REG_ISID_LEN); |
e3d6f909 | 461 | se_tpg->se_tpg_tfo->sess_get_initiator_sid(se_sess, |
c66ac9db NB |
462 | &buf[0], PR_REG_ISID_LEN); |
463 | se_sess->sess_bin_isid = get_unaligned_be64(&buf[0]); | |
464 | } | |
465 | spin_lock_irq(&se_nacl->nacl_sess_lock); | |
466 | /* | |
467 | * The se_nacl->nacl_sess pointer will be set to the | |
468 | * last active I_T Nexus for each struct se_node_acl. | |
469 | */ | |
470 | se_nacl->nacl_sess = se_sess; | |
471 | ||
472 | list_add_tail(&se_sess->sess_acl_list, | |
473 | &se_nacl->acl_sess_list); | |
474 | spin_unlock_irq(&se_nacl->nacl_sess_lock); | |
475 | } | |
476 | list_add_tail(&se_sess->sess_list, &se_tpg->tpg_sess_list); | |
477 | ||
478 | printk(KERN_INFO "TARGET_CORE[%s]: Registered fabric_sess_ptr: %p\n", | |
e3d6f909 | 479 | se_tpg->se_tpg_tfo->get_fabric_name(), se_sess->fabric_sess_ptr); |
c66ac9db NB |
480 | } |
481 | EXPORT_SYMBOL(__transport_register_session); | |
482 | ||
483 | void transport_register_session( | |
484 | struct se_portal_group *se_tpg, | |
485 | struct se_node_acl *se_nacl, | |
486 | struct se_session *se_sess, | |
487 | void *fabric_sess_ptr) | |
488 | { | |
489 | spin_lock_bh(&se_tpg->session_lock); | |
490 | __transport_register_session(se_tpg, se_nacl, se_sess, fabric_sess_ptr); | |
491 | spin_unlock_bh(&se_tpg->session_lock); | |
492 | } | |
493 | EXPORT_SYMBOL(transport_register_session); | |
494 | ||
495 | void transport_deregister_session_configfs(struct se_session *se_sess) | |
496 | { | |
497 | struct se_node_acl *se_nacl; | |
23388864 | 498 | unsigned long flags; |
c66ac9db NB |
499 | /* |
500 | * Used by struct se_node_acl's under ConfigFS to locate active struct se_session | |
501 | */ | |
502 | se_nacl = se_sess->se_node_acl; | |
503 | if ((se_nacl)) { | |
23388864 | 504 | spin_lock_irqsave(&se_nacl->nacl_sess_lock, flags); |
c66ac9db NB |
505 | list_del(&se_sess->sess_acl_list); |
506 | /* | |
507 | * If the session list is empty, then clear the pointer. | |
508 | * Otherwise, set the struct se_session pointer from the tail | |
509 | * element of the per struct se_node_acl active session list. | |
510 | */ | |
511 | if (list_empty(&se_nacl->acl_sess_list)) | |
512 | se_nacl->nacl_sess = NULL; | |
513 | else { | |
514 | se_nacl->nacl_sess = container_of( | |
515 | se_nacl->acl_sess_list.prev, | |
516 | struct se_session, sess_acl_list); | |
517 | } | |
23388864 | 518 | spin_unlock_irqrestore(&se_nacl->nacl_sess_lock, flags); |
c66ac9db NB |
519 | } |
520 | } | |
521 | EXPORT_SYMBOL(transport_deregister_session_configfs); | |
522 | ||
523 | void transport_free_session(struct se_session *se_sess) | |
524 | { | |
525 | kmem_cache_free(se_sess_cache, se_sess); | |
526 | } | |
527 | EXPORT_SYMBOL(transport_free_session); | |
528 | ||
529 | void transport_deregister_session(struct se_session *se_sess) | |
530 | { | |
531 | struct se_portal_group *se_tpg = se_sess->se_tpg; | |
532 | struct se_node_acl *se_nacl; | |
533 | ||
534 | if (!(se_tpg)) { | |
535 | transport_free_session(se_sess); | |
536 | return; | |
537 | } | |
c66ac9db NB |
538 | |
539 | spin_lock_bh(&se_tpg->session_lock); | |
540 | list_del(&se_sess->sess_list); | |
541 | se_sess->se_tpg = NULL; | |
542 | se_sess->fabric_sess_ptr = NULL; | |
543 | spin_unlock_bh(&se_tpg->session_lock); | |
544 | ||
545 | /* | |
546 | * Determine if we need to do extra work for this initiator node's | |
547 | * struct se_node_acl if it had been previously dynamically generated. | |
548 | */ | |
549 | se_nacl = se_sess->se_node_acl; | |
550 | if ((se_nacl)) { | |
551 | spin_lock_bh(&se_tpg->acl_node_lock); | |
552 | if (se_nacl->dynamic_node_acl) { | |
e3d6f909 | 553 | if (!(se_tpg->se_tpg_tfo->tpg_check_demo_mode_cache( |
c66ac9db NB |
554 | se_tpg))) { |
555 | list_del(&se_nacl->acl_list); | |
556 | se_tpg->num_node_acls--; | |
557 | spin_unlock_bh(&se_tpg->acl_node_lock); | |
558 | ||
559 | core_tpg_wait_for_nacl_pr_ref(se_nacl); | |
c66ac9db | 560 | core_free_device_list_for_node(se_nacl, se_tpg); |
e3d6f909 | 561 | se_tpg->se_tpg_tfo->tpg_release_fabric_acl(se_tpg, |
c66ac9db NB |
562 | se_nacl); |
563 | spin_lock_bh(&se_tpg->acl_node_lock); | |
564 | } | |
565 | } | |
566 | spin_unlock_bh(&se_tpg->acl_node_lock); | |
567 | } | |
568 | ||
569 | transport_free_session(se_sess); | |
570 | ||
571 | printk(KERN_INFO "TARGET_CORE[%s]: Deregistered fabric_sess\n", | |
e3d6f909 | 572 | se_tpg->se_tpg_tfo->get_fabric_name()); |
c66ac9db NB |
573 | } |
574 | EXPORT_SYMBOL(transport_deregister_session); | |
575 | ||
576 | /* | |
e3d6f909 | 577 | * Called with cmd->t_task->t_state_lock held. |
c66ac9db NB |
578 | */ |
579 | static void transport_all_task_dev_remove_state(struct se_cmd *cmd) | |
580 | { | |
581 | struct se_device *dev; | |
582 | struct se_task *task; | |
583 | unsigned long flags; | |
584 | ||
e3d6f909 | 585 | if (!cmd->t_task) |
c66ac9db NB |
586 | return; |
587 | ||
e3d6f909 | 588 | list_for_each_entry(task, &cmd->t_task->t_task_list, t_list) { |
c66ac9db NB |
589 | dev = task->se_dev; |
590 | if (!(dev)) | |
591 | continue; | |
592 | ||
593 | if (atomic_read(&task->task_active)) | |
594 | continue; | |
595 | ||
596 | if (!(atomic_read(&task->task_state_active))) | |
597 | continue; | |
598 | ||
599 | spin_lock_irqsave(&dev->execute_task_lock, flags); | |
600 | list_del(&task->t_state_list); | |
601 | DEBUG_TSTATE("Removed ITT: 0x%08x dev: %p task[%p]\n", | |
e3d6f909 | 602 | cmd->se_tfo->tfo_get_task_tag(cmd), dev, task); |
c66ac9db NB |
603 | spin_unlock_irqrestore(&dev->execute_task_lock, flags); |
604 | ||
605 | atomic_set(&task->task_state_active, 0); | |
e3d6f909 | 606 | atomic_dec(&cmd->t_task->t_task_cdbs_ex_left); |
c66ac9db NB |
607 | } |
608 | } | |
609 | ||
610 | /* transport_cmd_check_stop(): | |
611 | * | |
612 | * 'transport_off = 1' determines if t_transport_active should be cleared. | |
613 | * 'transport_off = 2' determines if task_dev_state should be removed. | |
614 | * | |
615 | * A non-zero u8 t_state sets cmd->t_state. | |
616 | * Returns 1 when command is stopped, else 0. | |
617 | */ | |
618 | static int transport_cmd_check_stop( | |
619 | struct se_cmd *cmd, | |
620 | int transport_off, | |
621 | u8 t_state) | |
622 | { | |
623 | unsigned long flags; | |
624 | ||
e3d6f909 | 625 | spin_lock_irqsave(&cmd->t_task->t_state_lock, flags); |
c66ac9db NB |
626 | /* |
627 | * Determine if IOCTL context caller in requesting the stopping of this | |
628 | * command for LUN shutdown purposes. | |
629 | */ | |
e3d6f909 AG |
630 | if (atomic_read(&cmd->t_task->transport_lun_stop)) { |
631 | DEBUG_CS("%s:%d atomic_read(&cmd->t_task->transport_lun_stop)" | |
c66ac9db | 632 | " == TRUE for ITT: 0x%08x\n", __func__, __LINE__, |
e3d6f909 | 633 | cmd->se_tfo->get_task_tag(cmd)); |
c66ac9db NB |
634 | |
635 | cmd->deferred_t_state = cmd->t_state; | |
636 | cmd->t_state = TRANSPORT_DEFERRED_CMD; | |
e3d6f909 | 637 | atomic_set(&cmd->t_task->t_transport_active, 0); |
c66ac9db NB |
638 | if (transport_off == 2) |
639 | transport_all_task_dev_remove_state(cmd); | |
e3d6f909 | 640 | spin_unlock_irqrestore(&cmd->t_task->t_state_lock, flags); |
c66ac9db | 641 | |
e3d6f909 | 642 | complete(&cmd->t_task->transport_lun_stop_comp); |
c66ac9db NB |
643 | return 1; |
644 | } | |
645 | /* | |
646 | * Determine if frontend context caller is requesting the stopping of | |
e3d6f909 | 647 | * this command for frontend exceptions. |
c66ac9db | 648 | */ |
e3d6f909 AG |
649 | if (atomic_read(&cmd->t_task->t_transport_stop)) { |
650 | DEBUG_CS("%s:%d atomic_read(&cmd->t_task->t_transport_stop) ==" | |
c66ac9db | 651 | " TRUE for ITT: 0x%08x\n", __func__, __LINE__, |
e3d6f909 | 652 | cmd->se_tfo->get_task_tag(cmd)); |
c66ac9db NB |
653 | |
654 | cmd->deferred_t_state = cmd->t_state; | |
655 | cmd->t_state = TRANSPORT_DEFERRED_CMD; | |
656 | if (transport_off == 2) | |
657 | transport_all_task_dev_remove_state(cmd); | |
658 | ||
659 | /* | |
660 | * Clear struct se_cmd->se_lun before the transport_off == 2 handoff | |
661 | * to FE. | |
662 | */ | |
663 | if (transport_off == 2) | |
664 | cmd->se_lun = NULL; | |
e3d6f909 | 665 | spin_unlock_irqrestore(&cmd->t_task->t_state_lock, flags); |
c66ac9db | 666 | |
e3d6f909 | 667 | complete(&cmd->t_task->t_transport_stop_comp); |
c66ac9db NB |
668 | return 1; |
669 | } | |
670 | if (transport_off) { | |
e3d6f909 | 671 | atomic_set(&cmd->t_task->t_transport_active, 0); |
c66ac9db NB |
672 | if (transport_off == 2) { |
673 | transport_all_task_dev_remove_state(cmd); | |
674 | /* | |
675 | * Clear struct se_cmd->se_lun before the transport_off == 2 | |
676 | * handoff to fabric module. | |
677 | */ | |
678 | cmd->se_lun = NULL; | |
679 | /* | |
680 | * Some fabric modules like tcm_loop can release | |
25985edc | 681 | * their internally allocated I/O reference now and |
c66ac9db NB |
682 | * struct se_cmd now. |
683 | */ | |
e3d6f909 | 684 | if (cmd->se_tfo->check_stop_free != NULL) { |
c66ac9db | 685 | spin_unlock_irqrestore( |
e3d6f909 | 686 | &cmd->t_task->t_state_lock, flags); |
c66ac9db | 687 | |
e3d6f909 | 688 | cmd->se_tfo->check_stop_free(cmd); |
c66ac9db NB |
689 | return 1; |
690 | } | |
691 | } | |
e3d6f909 | 692 | spin_unlock_irqrestore(&cmd->t_task->t_state_lock, flags); |
c66ac9db NB |
693 | |
694 | return 0; | |
695 | } else if (t_state) | |
696 | cmd->t_state = t_state; | |
e3d6f909 | 697 | spin_unlock_irqrestore(&cmd->t_task->t_state_lock, flags); |
c66ac9db NB |
698 | |
699 | return 0; | |
700 | } | |
701 | ||
702 | static int transport_cmd_check_stop_to_fabric(struct se_cmd *cmd) | |
703 | { | |
704 | return transport_cmd_check_stop(cmd, 2, 0); | |
705 | } | |
706 | ||
707 | static void transport_lun_remove_cmd(struct se_cmd *cmd) | |
708 | { | |
e3d6f909 | 709 | struct se_lun *lun = cmd->se_lun; |
c66ac9db NB |
710 | unsigned long flags; |
711 | ||
712 | if (!lun) | |
713 | return; | |
714 | ||
e3d6f909 AG |
715 | spin_lock_irqsave(&cmd->t_task->t_state_lock, flags); |
716 | if (!(atomic_read(&cmd->t_task->transport_dev_active))) { | |
717 | spin_unlock_irqrestore(&cmd->t_task->t_state_lock, flags); | |
c66ac9db NB |
718 | goto check_lun; |
719 | } | |
e3d6f909 | 720 | atomic_set(&cmd->t_task->transport_dev_active, 0); |
c66ac9db | 721 | transport_all_task_dev_remove_state(cmd); |
e3d6f909 | 722 | spin_unlock_irqrestore(&cmd->t_task->t_state_lock, flags); |
c66ac9db | 723 | |
c66ac9db NB |
724 | |
725 | check_lun: | |
726 | spin_lock_irqsave(&lun->lun_cmd_lock, flags); | |
e3d6f909 | 727 | if (atomic_read(&cmd->t_task->transport_lun_active)) { |
c66ac9db | 728 | list_del(&cmd->se_lun_list); |
e3d6f909 | 729 | atomic_set(&cmd->t_task->transport_lun_active, 0); |
c66ac9db NB |
730 | #if 0 |
731 | printk(KERN_INFO "Removed ITT: 0x%08x from LUN LIST[%d]\n" | |
e3d6f909 | 732 | cmd->se_tfo->get_task_tag(cmd), lun->unpacked_lun); |
c66ac9db NB |
733 | #endif |
734 | } | |
735 | spin_unlock_irqrestore(&lun->lun_cmd_lock, flags); | |
736 | } | |
737 | ||
738 | void transport_cmd_finish_abort(struct se_cmd *cmd, int remove) | |
739 | { | |
e3d6f909 | 740 | transport_remove_cmd_from_queue(cmd, &cmd->se_lun->lun_se_dev->dev_queue_obj); |
c66ac9db NB |
741 | transport_lun_remove_cmd(cmd); |
742 | ||
743 | if (transport_cmd_check_stop_to_fabric(cmd)) | |
744 | return; | |
745 | if (remove) | |
746 | transport_generic_remove(cmd, 0, 0); | |
747 | } | |
748 | ||
749 | void transport_cmd_finish_abort_tmr(struct se_cmd *cmd) | |
750 | { | |
e3d6f909 | 751 | transport_remove_cmd_from_queue(cmd, &cmd->se_lun->lun_se_dev->dev_queue_obj); |
c66ac9db NB |
752 | |
753 | if (transport_cmd_check_stop_to_fabric(cmd)) | |
754 | return; | |
755 | ||
756 | transport_generic_remove(cmd, 0, 0); | |
757 | } | |
758 | ||
759 | static int transport_add_cmd_to_queue( | |
760 | struct se_cmd *cmd, | |
761 | int t_state) | |
762 | { | |
763 | struct se_device *dev = cmd->se_dev; | |
e3d6f909 | 764 | struct se_queue_obj *qobj = &dev->dev_queue_obj; |
c66ac9db NB |
765 | struct se_queue_req *qr; |
766 | unsigned long flags; | |
767 | ||
768 | qr = kzalloc(sizeof(struct se_queue_req), GFP_ATOMIC); | |
769 | if (!(qr)) { | |
770 | printk(KERN_ERR "Unable to allocate memory for" | |
771 | " struct se_queue_req\n"); | |
e3d6f909 | 772 | return -ENOMEM; |
c66ac9db NB |
773 | } |
774 | INIT_LIST_HEAD(&qr->qr_list); | |
775 | ||
e3d6f909 | 776 | qr->cmd = cmd; |
c66ac9db NB |
777 | qr->state = t_state; |
778 | ||
779 | if (t_state) { | |
e3d6f909 | 780 | spin_lock_irqsave(&cmd->t_task->t_state_lock, flags); |
c66ac9db | 781 | cmd->t_state = t_state; |
e3d6f909 AG |
782 | atomic_set(&cmd->t_task->t_transport_active, 1); |
783 | spin_unlock_irqrestore(&cmd->t_task->t_state_lock, flags); | |
c66ac9db NB |
784 | } |
785 | ||
786 | spin_lock_irqsave(&qobj->cmd_queue_lock, flags); | |
787 | list_add_tail(&qr->qr_list, &qobj->qobj_list); | |
e3d6f909 | 788 | atomic_inc(&cmd->t_task->t_transport_queue_active); |
c66ac9db NB |
789 | spin_unlock_irqrestore(&qobj->cmd_queue_lock, flags); |
790 | ||
791 | atomic_inc(&qobj->queue_cnt); | |
792 | wake_up_interruptible(&qobj->thread_wq); | |
793 | return 0; | |
794 | } | |
795 | ||
796 | /* | |
797 | * Called with struct se_queue_obj->cmd_queue_lock held. | |
798 | */ | |
c66ac9db NB |
799 | static struct se_queue_req * |
800 | transport_get_qr_from_queue(struct se_queue_obj *qobj) | |
801 | { | |
c66ac9db NB |
802 | struct se_queue_req *qr; |
803 | unsigned long flags; | |
804 | ||
805 | spin_lock_irqsave(&qobj->cmd_queue_lock, flags); | |
806 | if (list_empty(&qobj->qobj_list)) { | |
807 | spin_unlock_irqrestore(&qobj->cmd_queue_lock, flags); | |
808 | return NULL; | |
809 | } | |
810 | ||
811 | list_for_each_entry(qr, &qobj->qobj_list, qr_list) | |
812 | break; | |
813 | ||
e3d6f909 AG |
814 | if (qr->cmd) |
815 | atomic_dec(&qr->cmd->t_task->t_transport_queue_active); | |
816 | ||
c66ac9db NB |
817 | list_del(&qr->qr_list); |
818 | atomic_dec(&qobj->queue_cnt); | |
819 | spin_unlock_irqrestore(&qobj->cmd_queue_lock, flags); | |
820 | ||
821 | return qr; | |
822 | } | |
823 | ||
824 | static void transport_remove_cmd_from_queue(struct se_cmd *cmd, | |
825 | struct se_queue_obj *qobj) | |
826 | { | |
c66ac9db NB |
827 | struct se_queue_req *qr = NULL, *qr_p = NULL; |
828 | unsigned long flags; | |
829 | ||
830 | spin_lock_irqsave(&qobj->cmd_queue_lock, flags); | |
e3d6f909 | 831 | if (!(atomic_read(&cmd->t_task->t_transport_queue_active))) { |
c66ac9db NB |
832 | spin_unlock_irqrestore(&qobj->cmd_queue_lock, flags); |
833 | return; | |
834 | } | |
835 | ||
836 | list_for_each_entry_safe(qr, qr_p, &qobj->qobj_list, qr_list) { | |
e3d6f909 | 837 | if (qr->cmd != cmd) |
c66ac9db NB |
838 | continue; |
839 | ||
e3d6f909 | 840 | atomic_dec(&qr->cmd->t_task->t_transport_queue_active); |
c66ac9db NB |
841 | atomic_dec(&qobj->queue_cnt); |
842 | list_del(&qr->qr_list); | |
843 | kfree(qr); | |
844 | } | |
845 | spin_unlock_irqrestore(&qobj->cmd_queue_lock, flags); | |
846 | ||
e3d6f909 | 847 | if (atomic_read(&cmd->t_task->t_transport_queue_active)) { |
c66ac9db | 848 | printk(KERN_ERR "ITT: 0x%08x t_transport_queue_active: %d\n", |
e3d6f909 AG |
849 | cmd->se_tfo->get_task_tag(cmd), |
850 | atomic_read(&cmd->t_task->t_transport_queue_active)); | |
c66ac9db NB |
851 | } |
852 | } | |
853 | ||
854 | /* | |
855 | * Completion function used by TCM subsystem plugins (such as FILEIO) | |
856 | * for queueing up response from struct se_subsystem_api->do_task() | |
857 | */ | |
858 | void transport_complete_sync_cache(struct se_cmd *cmd, int good) | |
859 | { | |
e3d6f909 | 860 | struct se_task *task = list_entry(cmd->t_task->t_task_list.next, |
c66ac9db NB |
861 | struct se_task, t_list); |
862 | ||
863 | if (good) { | |
864 | cmd->scsi_status = SAM_STAT_GOOD; | |
865 | task->task_scsi_status = GOOD; | |
866 | } else { | |
867 | task->task_scsi_status = SAM_STAT_CHECK_CONDITION; | |
868 | task->task_error_status = PYX_TRANSPORT_ILLEGAL_REQUEST; | |
e3d6f909 | 869 | task->task_se_cmd->transport_error_status = |
c66ac9db NB |
870 | PYX_TRANSPORT_ILLEGAL_REQUEST; |
871 | } | |
872 | ||
873 | transport_complete_task(task, good); | |
874 | } | |
875 | EXPORT_SYMBOL(transport_complete_sync_cache); | |
876 | ||
877 | /* transport_complete_task(): | |
878 | * | |
879 | * Called from interrupt and non interrupt context depending | |
880 | * on the transport plugin. | |
881 | */ | |
882 | void transport_complete_task(struct se_task *task, int success) | |
883 | { | |
e3d6f909 | 884 | struct se_cmd *cmd = task->task_se_cmd; |
c66ac9db NB |
885 | struct se_device *dev = task->se_dev; |
886 | int t_state; | |
887 | unsigned long flags; | |
888 | #if 0 | |
889 | printk(KERN_INFO "task: %p CDB: 0x%02x obj_ptr: %p\n", task, | |
e3d6f909 | 890 | cmd->t_task->t_task_cdb[0], dev); |
c66ac9db | 891 | #endif |
e3d6f909 | 892 | if (dev) |
c66ac9db | 893 | atomic_inc(&dev->depth_left); |
c66ac9db | 894 | |
e3d6f909 | 895 | spin_lock_irqsave(&cmd->t_task->t_state_lock, flags); |
c66ac9db NB |
896 | atomic_set(&task->task_active, 0); |
897 | ||
898 | /* | |
899 | * See if any sense data exists, if so set the TASK_SENSE flag. | |
900 | * Also check for any other post completion work that needs to be | |
901 | * done by the plugins. | |
902 | */ | |
903 | if (dev && dev->transport->transport_complete) { | |
904 | if (dev->transport->transport_complete(task) != 0) { | |
905 | cmd->se_cmd_flags |= SCF_TRANSPORT_TASK_SENSE; | |
906 | task->task_sense = 1; | |
907 | success = 1; | |
908 | } | |
909 | } | |
910 | ||
911 | /* | |
912 | * See if we are waiting for outstanding struct se_task | |
913 | * to complete for an exception condition | |
914 | */ | |
915 | if (atomic_read(&task->task_stop)) { | |
916 | /* | |
e3d6f909 | 917 | * Decrement cmd->t_task->t_se_count if this task had |
c66ac9db NB |
918 | * previously thrown its timeout exception handler. |
919 | */ | |
920 | if (atomic_read(&task->task_timeout)) { | |
e3d6f909 | 921 | atomic_dec(&cmd->t_task->t_se_count); |
c66ac9db NB |
922 | atomic_set(&task->task_timeout, 0); |
923 | } | |
e3d6f909 | 924 | spin_unlock_irqrestore(&cmd->t_task->t_state_lock, flags); |
c66ac9db NB |
925 | |
926 | complete(&task->task_stop_comp); | |
927 | return; | |
928 | } | |
929 | /* | |
930 | * If the task's timeout handler has fired, use the t_task_cdbs_timeout | |
931 | * left counter to determine when the struct se_cmd is ready to be queued to | |
932 | * the processing thread. | |
933 | */ | |
934 | if (atomic_read(&task->task_timeout)) { | |
935 | if (!(atomic_dec_and_test( | |
e3d6f909 AG |
936 | &cmd->t_task->t_task_cdbs_timeout_left))) { |
937 | spin_unlock_irqrestore(&cmd->t_task->t_state_lock, | |
c66ac9db NB |
938 | flags); |
939 | return; | |
940 | } | |
941 | t_state = TRANSPORT_COMPLETE_TIMEOUT; | |
e3d6f909 | 942 | spin_unlock_irqrestore(&cmd->t_task->t_state_lock, flags); |
c66ac9db NB |
943 | |
944 | transport_add_cmd_to_queue(cmd, t_state); | |
945 | return; | |
946 | } | |
e3d6f909 | 947 | atomic_dec(&cmd->t_task->t_task_cdbs_timeout_left); |
c66ac9db NB |
948 | |
949 | /* | |
950 | * Decrement the outstanding t_task_cdbs_left count. The last | |
951 | * struct se_task from struct se_cmd will complete itself into the | |
952 | * device queue depending upon int success. | |
953 | */ | |
e3d6f909 | 954 | if (!(atomic_dec_and_test(&cmd->t_task->t_task_cdbs_left))) { |
c66ac9db | 955 | if (!success) |
e3d6f909 | 956 | cmd->t_task->t_tasks_failed = 1; |
c66ac9db | 957 | |
e3d6f909 | 958 | spin_unlock_irqrestore(&cmd->t_task->t_state_lock, flags); |
c66ac9db NB |
959 | return; |
960 | } | |
961 | ||
e3d6f909 | 962 | if (!success || cmd->t_task->t_tasks_failed) { |
c66ac9db NB |
963 | t_state = TRANSPORT_COMPLETE_FAILURE; |
964 | if (!task->task_error_status) { | |
965 | task->task_error_status = | |
966 | PYX_TRANSPORT_UNKNOWN_SAM_OPCODE; | |
967 | cmd->transport_error_status = | |
968 | PYX_TRANSPORT_UNKNOWN_SAM_OPCODE; | |
969 | } | |
970 | } else { | |
e3d6f909 | 971 | atomic_set(&cmd->t_task->t_transport_complete, 1); |
c66ac9db NB |
972 | t_state = TRANSPORT_COMPLETE_OK; |
973 | } | |
e3d6f909 | 974 | spin_unlock_irqrestore(&cmd->t_task->t_state_lock, flags); |
c66ac9db NB |
975 | |
976 | transport_add_cmd_to_queue(cmd, t_state); | |
977 | } | |
978 | EXPORT_SYMBOL(transport_complete_task); | |
979 | ||
980 | /* | |
981 | * Called by transport_add_tasks_from_cmd() once a struct se_cmd's | |
982 | * struct se_task list are ready to be added to the active execution list | |
983 | * struct se_device | |
984 | ||
985 | * Called with se_dev_t->execute_task_lock called. | |
986 | */ | |
987 | static inline int transport_add_task_check_sam_attr( | |
988 | struct se_task *task, | |
989 | struct se_task *task_prev, | |
990 | struct se_device *dev) | |
991 | { | |
992 | /* | |
993 | * No SAM Task attribute emulation enabled, add to tail of | |
994 | * execution queue | |
995 | */ | |
996 | if (dev->dev_task_attr_type != SAM_TASK_ATTR_EMULATED) { | |
997 | list_add_tail(&task->t_execute_list, &dev->execute_task_list); | |
998 | return 0; | |
999 | } | |
1000 | /* | |
1001 | * HEAD_OF_QUEUE attribute for received CDB, which means | |
1002 | * the first task that is associated with a struct se_cmd goes to | |
1003 | * head of the struct se_device->execute_task_list, and task_prev | |
1004 | * after that for each subsequent task | |
1005 | */ | |
e66ecd50 | 1006 | if (task->task_se_cmd->sam_task_attr == MSG_HEAD_TAG) { |
c66ac9db NB |
1007 | list_add(&task->t_execute_list, |
1008 | (task_prev != NULL) ? | |
1009 | &task_prev->t_execute_list : | |
1010 | &dev->execute_task_list); | |
1011 | ||
1012 | DEBUG_STA("Set HEAD_OF_QUEUE for task CDB: 0x%02x" | |
1013 | " in execution queue\n", | |
1014 | T_TASK(task->task_se_cmd)->t_task_cdb[0]); | |
1015 | return 1; | |
1016 | } | |
1017 | /* | |
1018 | * For ORDERED, SIMPLE or UNTAGGED attribute tasks once they have been | |
1019 | * transitioned from Dermant -> Active state, and are added to the end | |
1020 | * of the struct se_device->execute_task_list | |
1021 | */ | |
1022 | list_add_tail(&task->t_execute_list, &dev->execute_task_list); | |
1023 | return 0; | |
1024 | } | |
1025 | ||
1026 | /* __transport_add_task_to_execute_queue(): | |
1027 | * | |
1028 | * Called with se_dev_t->execute_task_lock called. | |
1029 | */ | |
1030 | static void __transport_add_task_to_execute_queue( | |
1031 | struct se_task *task, | |
1032 | struct se_task *task_prev, | |
1033 | struct se_device *dev) | |
1034 | { | |
1035 | int head_of_queue; | |
1036 | ||
1037 | head_of_queue = transport_add_task_check_sam_attr(task, task_prev, dev); | |
1038 | atomic_inc(&dev->execute_tasks); | |
1039 | ||
1040 | if (atomic_read(&task->task_state_active)) | |
1041 | return; | |
1042 | /* | |
1043 | * Determine if this task needs to go to HEAD_OF_QUEUE for the | |
1044 | * state list as well. Running with SAM Task Attribute emulation | |
1045 | * will always return head_of_queue == 0 here | |
1046 | */ | |
1047 | if (head_of_queue) | |
1048 | list_add(&task->t_state_list, (task_prev) ? | |
1049 | &task_prev->t_state_list : | |
1050 | &dev->state_task_list); | |
1051 | else | |
1052 | list_add_tail(&task->t_state_list, &dev->state_task_list); | |
1053 | ||
1054 | atomic_set(&task->task_state_active, 1); | |
1055 | ||
1056 | DEBUG_TSTATE("Added ITT: 0x%08x task[%p] to dev: %p\n", | |
e3d6f909 | 1057 | task->task_se_cmd->se_tfo->get_task_tag(task->task_se_cmd), |
c66ac9db NB |
1058 | task, dev); |
1059 | } | |
1060 | ||
1061 | static void transport_add_tasks_to_state_queue(struct se_cmd *cmd) | |
1062 | { | |
1063 | struct se_device *dev; | |
1064 | struct se_task *task; | |
1065 | unsigned long flags; | |
1066 | ||
e3d6f909 AG |
1067 | spin_lock_irqsave(&cmd->t_task->t_state_lock, flags); |
1068 | list_for_each_entry(task, &cmd->t_task->t_task_list, t_list) { | |
c66ac9db NB |
1069 | dev = task->se_dev; |
1070 | ||
1071 | if (atomic_read(&task->task_state_active)) | |
1072 | continue; | |
1073 | ||
1074 | spin_lock(&dev->execute_task_lock); | |
1075 | list_add_tail(&task->t_state_list, &dev->state_task_list); | |
1076 | atomic_set(&task->task_state_active, 1); | |
1077 | ||
1078 | DEBUG_TSTATE("Added ITT: 0x%08x task[%p] to dev: %p\n", | |
e3d6f909 | 1079 | task->se_cmd->se_tfo->get_task_tag( |
c66ac9db NB |
1080 | task->task_se_cmd), task, dev); |
1081 | ||
1082 | spin_unlock(&dev->execute_task_lock); | |
1083 | } | |
e3d6f909 | 1084 | spin_unlock_irqrestore(&cmd->t_task->t_state_lock, flags); |
c66ac9db NB |
1085 | } |
1086 | ||
1087 | static void transport_add_tasks_from_cmd(struct se_cmd *cmd) | |
1088 | { | |
e3d6f909 | 1089 | struct se_device *dev = cmd->se_lun->lun_se_dev; |
c66ac9db NB |
1090 | struct se_task *task, *task_prev = NULL; |
1091 | unsigned long flags; | |
1092 | ||
1093 | spin_lock_irqsave(&dev->execute_task_lock, flags); | |
e3d6f909 | 1094 | list_for_each_entry(task, &cmd->t_task->t_task_list, t_list) { |
c66ac9db NB |
1095 | if (atomic_read(&task->task_execute_queue)) |
1096 | continue; | |
1097 | /* | |
1098 | * __transport_add_task_to_execute_queue() handles the | |
1099 | * SAM Task Attribute emulation if enabled | |
1100 | */ | |
1101 | __transport_add_task_to_execute_queue(task, task_prev, dev); | |
1102 | atomic_set(&task->task_execute_queue, 1); | |
1103 | task_prev = task; | |
1104 | } | |
1105 | spin_unlock_irqrestore(&dev->execute_task_lock, flags); | |
c66ac9db NB |
1106 | } |
1107 | ||
1108 | /* transport_remove_task_from_execute_queue(): | |
1109 | * | |
1110 | * | |
1111 | */ | |
52208ae3 | 1112 | void transport_remove_task_from_execute_queue( |
c66ac9db NB |
1113 | struct se_task *task, |
1114 | struct se_device *dev) | |
1115 | { | |
1116 | unsigned long flags; | |
1117 | ||
af57c3ac NB |
1118 | if (atomic_read(&task->task_execute_queue) == 0) { |
1119 | dump_stack(); | |
1120 | return; | |
1121 | } | |
1122 | ||
c66ac9db NB |
1123 | spin_lock_irqsave(&dev->execute_task_lock, flags); |
1124 | list_del(&task->t_execute_list); | |
af57c3ac | 1125 | atomic_set(&task->task_execute_queue, 0); |
c66ac9db NB |
1126 | atomic_dec(&dev->execute_tasks); |
1127 | spin_unlock_irqrestore(&dev->execute_task_lock, flags); | |
1128 | } | |
1129 | ||
1130 | unsigned char *transport_dump_cmd_direction(struct se_cmd *cmd) | |
1131 | { | |
1132 | switch (cmd->data_direction) { | |
1133 | case DMA_NONE: | |
1134 | return "NONE"; | |
1135 | case DMA_FROM_DEVICE: | |
1136 | return "READ"; | |
1137 | case DMA_TO_DEVICE: | |
1138 | return "WRITE"; | |
1139 | case DMA_BIDIRECTIONAL: | |
1140 | return "BIDI"; | |
1141 | default: | |
1142 | break; | |
1143 | } | |
1144 | ||
1145 | return "UNKNOWN"; | |
1146 | } | |
1147 | ||
1148 | void transport_dump_dev_state( | |
1149 | struct se_device *dev, | |
1150 | char *b, | |
1151 | int *bl) | |
1152 | { | |
1153 | *bl += sprintf(b + *bl, "Status: "); | |
1154 | switch (dev->dev_status) { | |
1155 | case TRANSPORT_DEVICE_ACTIVATED: | |
1156 | *bl += sprintf(b + *bl, "ACTIVATED"); | |
1157 | break; | |
1158 | case TRANSPORT_DEVICE_DEACTIVATED: | |
1159 | *bl += sprintf(b + *bl, "DEACTIVATED"); | |
1160 | break; | |
1161 | case TRANSPORT_DEVICE_SHUTDOWN: | |
1162 | *bl += sprintf(b + *bl, "SHUTDOWN"); | |
1163 | break; | |
1164 | case TRANSPORT_DEVICE_OFFLINE_ACTIVATED: | |
1165 | case TRANSPORT_DEVICE_OFFLINE_DEACTIVATED: | |
1166 | *bl += sprintf(b + *bl, "OFFLINE"); | |
1167 | break; | |
1168 | default: | |
1169 | *bl += sprintf(b + *bl, "UNKNOWN=%d", dev->dev_status); | |
1170 | break; | |
1171 | } | |
1172 | ||
1173 | *bl += sprintf(b + *bl, " Execute/Left/Max Queue Depth: %d/%d/%d", | |
1174 | atomic_read(&dev->execute_tasks), atomic_read(&dev->depth_left), | |
1175 | dev->queue_depth); | |
1176 | *bl += sprintf(b + *bl, " SectorSize: %u MaxSectors: %u\n", | |
e3d6f909 | 1177 | dev->se_sub_dev->se_dev_attrib.block_size, dev->se_sub_dev->se_dev_attrib.max_sectors); |
c66ac9db NB |
1178 | *bl += sprintf(b + *bl, " "); |
1179 | } | |
1180 | ||
1181 | /* transport_release_all_cmds(): | |
1182 | * | |
1183 | * | |
1184 | */ | |
1185 | static void transport_release_all_cmds(struct se_device *dev) | |
1186 | { | |
1187 | struct se_cmd *cmd = NULL; | |
1188 | struct se_queue_req *qr = NULL, *qr_p = NULL; | |
1189 | int bug_out = 0, t_state; | |
1190 | unsigned long flags; | |
1191 | ||
e3d6f909 AG |
1192 | spin_lock_irqsave(&dev->dev_queue_obj.cmd_queue_lock, flags); |
1193 | list_for_each_entry_safe(qr, qr_p, &dev->dev_queue_obj.qobj_list, | |
c66ac9db NB |
1194 | qr_list) { |
1195 | ||
e3d6f909 | 1196 | cmd = qr->cmd; |
c66ac9db NB |
1197 | t_state = qr->state; |
1198 | list_del(&qr->qr_list); | |
1199 | kfree(qr); | |
e3d6f909 | 1200 | spin_unlock_irqrestore(&dev->dev_queue_obj.cmd_queue_lock, |
c66ac9db NB |
1201 | flags); |
1202 | ||
1203 | printk(KERN_ERR "Releasing ITT: 0x%08x, i_state: %u," | |
1204 | " t_state: %u directly\n", | |
e3d6f909 AG |
1205 | cmd->se_tfo->get_task_tag(cmd), |
1206 | cmd->se_tfo->get_cmd_state(cmd), t_state); | |
c66ac9db NB |
1207 | |
1208 | transport_release_fe_cmd(cmd); | |
1209 | bug_out = 1; | |
1210 | ||
e3d6f909 | 1211 | spin_lock_irqsave(&dev->dev_queue_obj.cmd_queue_lock, flags); |
c66ac9db | 1212 | } |
e3d6f909 | 1213 | spin_unlock_irqrestore(&dev->dev_queue_obj.cmd_queue_lock, flags); |
c66ac9db NB |
1214 | #if 0 |
1215 | if (bug_out) | |
1216 | BUG(); | |
1217 | #endif | |
1218 | } | |
1219 | ||
1220 | void transport_dump_vpd_proto_id( | |
1221 | struct t10_vpd *vpd, | |
1222 | unsigned char *p_buf, | |
1223 | int p_buf_len) | |
1224 | { | |
1225 | unsigned char buf[VPD_TMP_BUF_SIZE]; | |
1226 | int len; | |
1227 | ||
1228 | memset(buf, 0, VPD_TMP_BUF_SIZE); | |
1229 | len = sprintf(buf, "T10 VPD Protocol Identifier: "); | |
1230 | ||
1231 | switch (vpd->protocol_identifier) { | |
1232 | case 0x00: | |
1233 | sprintf(buf+len, "Fibre Channel\n"); | |
1234 | break; | |
1235 | case 0x10: | |
1236 | sprintf(buf+len, "Parallel SCSI\n"); | |
1237 | break; | |
1238 | case 0x20: | |
1239 | sprintf(buf+len, "SSA\n"); | |
1240 | break; | |
1241 | case 0x30: | |
1242 | sprintf(buf+len, "IEEE 1394\n"); | |
1243 | break; | |
1244 | case 0x40: | |
1245 | sprintf(buf+len, "SCSI Remote Direct Memory Access" | |
1246 | " Protocol\n"); | |
1247 | break; | |
1248 | case 0x50: | |
1249 | sprintf(buf+len, "Internet SCSI (iSCSI)\n"); | |
1250 | break; | |
1251 | case 0x60: | |
1252 | sprintf(buf+len, "SAS Serial SCSI Protocol\n"); | |
1253 | break; | |
1254 | case 0x70: | |
1255 | sprintf(buf+len, "Automation/Drive Interface Transport" | |
1256 | " Protocol\n"); | |
1257 | break; | |
1258 | case 0x80: | |
1259 | sprintf(buf+len, "AT Attachment Interface ATA/ATAPI\n"); | |
1260 | break; | |
1261 | default: | |
1262 | sprintf(buf+len, "Unknown 0x%02x\n", | |
1263 | vpd->protocol_identifier); | |
1264 | break; | |
1265 | } | |
1266 | ||
1267 | if (p_buf) | |
1268 | strncpy(p_buf, buf, p_buf_len); | |
1269 | else | |
1270 | printk(KERN_INFO "%s", buf); | |
1271 | } | |
1272 | ||
1273 | void | |
1274 | transport_set_vpd_proto_id(struct t10_vpd *vpd, unsigned char *page_83) | |
1275 | { | |
1276 | /* | |
1277 | * Check if the Protocol Identifier Valid (PIV) bit is set.. | |
1278 | * | |
1279 | * from spc3r23.pdf section 7.5.1 | |
1280 | */ | |
1281 | if (page_83[1] & 0x80) { | |
1282 | vpd->protocol_identifier = (page_83[0] & 0xf0); | |
1283 | vpd->protocol_identifier_set = 1; | |
1284 | transport_dump_vpd_proto_id(vpd, NULL, 0); | |
1285 | } | |
1286 | } | |
1287 | EXPORT_SYMBOL(transport_set_vpd_proto_id); | |
1288 | ||
1289 | int transport_dump_vpd_assoc( | |
1290 | struct t10_vpd *vpd, | |
1291 | unsigned char *p_buf, | |
1292 | int p_buf_len) | |
1293 | { | |
1294 | unsigned char buf[VPD_TMP_BUF_SIZE]; | |
e3d6f909 AG |
1295 | int ret = 0; |
1296 | int len; | |
c66ac9db NB |
1297 | |
1298 | memset(buf, 0, VPD_TMP_BUF_SIZE); | |
1299 | len = sprintf(buf, "T10 VPD Identifier Association: "); | |
1300 | ||
1301 | switch (vpd->association) { | |
1302 | case 0x00: | |
1303 | sprintf(buf+len, "addressed logical unit\n"); | |
1304 | break; | |
1305 | case 0x10: | |
1306 | sprintf(buf+len, "target port\n"); | |
1307 | break; | |
1308 | case 0x20: | |
1309 | sprintf(buf+len, "SCSI target device\n"); | |
1310 | break; | |
1311 | default: | |
1312 | sprintf(buf+len, "Unknown 0x%02x\n", vpd->association); | |
e3d6f909 | 1313 | ret = -EINVAL; |
c66ac9db NB |
1314 | break; |
1315 | } | |
1316 | ||
1317 | if (p_buf) | |
1318 | strncpy(p_buf, buf, p_buf_len); | |
1319 | else | |
1320 | printk("%s", buf); | |
1321 | ||
1322 | return ret; | |
1323 | } | |
1324 | ||
1325 | int transport_set_vpd_assoc(struct t10_vpd *vpd, unsigned char *page_83) | |
1326 | { | |
1327 | /* | |
1328 | * The VPD identification association.. | |
1329 | * | |
1330 | * from spc3r23.pdf Section 7.6.3.1 Table 297 | |
1331 | */ | |
1332 | vpd->association = (page_83[1] & 0x30); | |
1333 | return transport_dump_vpd_assoc(vpd, NULL, 0); | |
1334 | } | |
1335 | EXPORT_SYMBOL(transport_set_vpd_assoc); | |
1336 | ||
1337 | int transport_dump_vpd_ident_type( | |
1338 | struct t10_vpd *vpd, | |
1339 | unsigned char *p_buf, | |
1340 | int p_buf_len) | |
1341 | { | |
1342 | unsigned char buf[VPD_TMP_BUF_SIZE]; | |
e3d6f909 AG |
1343 | int ret = 0; |
1344 | int len; | |
c66ac9db NB |
1345 | |
1346 | memset(buf, 0, VPD_TMP_BUF_SIZE); | |
1347 | len = sprintf(buf, "T10 VPD Identifier Type: "); | |
1348 | ||
1349 | switch (vpd->device_identifier_type) { | |
1350 | case 0x00: | |
1351 | sprintf(buf+len, "Vendor specific\n"); | |
1352 | break; | |
1353 | case 0x01: | |
1354 | sprintf(buf+len, "T10 Vendor ID based\n"); | |
1355 | break; | |
1356 | case 0x02: | |
1357 | sprintf(buf+len, "EUI-64 based\n"); | |
1358 | break; | |
1359 | case 0x03: | |
1360 | sprintf(buf+len, "NAA\n"); | |
1361 | break; | |
1362 | case 0x04: | |
1363 | sprintf(buf+len, "Relative target port identifier\n"); | |
1364 | break; | |
1365 | case 0x08: | |
1366 | sprintf(buf+len, "SCSI name string\n"); | |
1367 | break; | |
1368 | default: | |
1369 | sprintf(buf+len, "Unsupported: 0x%02x\n", | |
1370 | vpd->device_identifier_type); | |
e3d6f909 | 1371 | ret = -EINVAL; |
c66ac9db NB |
1372 | break; |
1373 | } | |
1374 | ||
e3d6f909 AG |
1375 | if (p_buf) { |
1376 | if (p_buf_len < strlen(buf)+1) | |
1377 | return -EINVAL; | |
c66ac9db | 1378 | strncpy(p_buf, buf, p_buf_len); |
e3d6f909 | 1379 | } else { |
c66ac9db | 1380 | printk("%s", buf); |
e3d6f909 | 1381 | } |
c66ac9db NB |
1382 | |
1383 | return ret; | |
1384 | } | |
1385 | ||
1386 | int transport_set_vpd_ident_type(struct t10_vpd *vpd, unsigned char *page_83) | |
1387 | { | |
1388 | /* | |
1389 | * The VPD identifier type.. | |
1390 | * | |
1391 | * from spc3r23.pdf Section 7.6.3.1 Table 298 | |
1392 | */ | |
1393 | vpd->device_identifier_type = (page_83[1] & 0x0f); | |
1394 | return transport_dump_vpd_ident_type(vpd, NULL, 0); | |
1395 | } | |
1396 | EXPORT_SYMBOL(transport_set_vpd_ident_type); | |
1397 | ||
1398 | int transport_dump_vpd_ident( | |
1399 | struct t10_vpd *vpd, | |
1400 | unsigned char *p_buf, | |
1401 | int p_buf_len) | |
1402 | { | |
1403 | unsigned char buf[VPD_TMP_BUF_SIZE]; | |
1404 | int ret = 0; | |
1405 | ||
1406 | memset(buf, 0, VPD_TMP_BUF_SIZE); | |
1407 | ||
1408 | switch (vpd->device_identifier_code_set) { | |
1409 | case 0x01: /* Binary */ | |
1410 | sprintf(buf, "T10 VPD Binary Device Identifier: %s\n", | |
1411 | &vpd->device_identifier[0]); | |
1412 | break; | |
1413 | case 0x02: /* ASCII */ | |
1414 | sprintf(buf, "T10 VPD ASCII Device Identifier: %s\n", | |
1415 | &vpd->device_identifier[0]); | |
1416 | break; | |
1417 | case 0x03: /* UTF-8 */ | |
1418 | sprintf(buf, "T10 VPD UTF-8 Device Identifier: %s\n", | |
1419 | &vpd->device_identifier[0]); | |
1420 | break; | |
1421 | default: | |
1422 | sprintf(buf, "T10 VPD Device Identifier encoding unsupported:" | |
1423 | " 0x%02x", vpd->device_identifier_code_set); | |
e3d6f909 | 1424 | ret = -EINVAL; |
c66ac9db NB |
1425 | break; |
1426 | } | |
1427 | ||
1428 | if (p_buf) | |
1429 | strncpy(p_buf, buf, p_buf_len); | |
1430 | else | |
1431 | printk("%s", buf); | |
1432 | ||
1433 | return ret; | |
1434 | } | |
1435 | ||
1436 | int | |
1437 | transport_set_vpd_ident(struct t10_vpd *vpd, unsigned char *page_83) | |
1438 | { | |
1439 | static const char hex_str[] = "0123456789abcdef"; | |
1440 | int j = 0, i = 4; /* offset to start of the identifer */ | |
1441 | ||
1442 | /* | |
1443 | * The VPD Code Set (encoding) | |
1444 | * | |
1445 | * from spc3r23.pdf Section 7.6.3.1 Table 296 | |
1446 | */ | |
1447 | vpd->device_identifier_code_set = (page_83[0] & 0x0f); | |
1448 | switch (vpd->device_identifier_code_set) { | |
1449 | case 0x01: /* Binary */ | |
1450 | vpd->device_identifier[j++] = | |
1451 | hex_str[vpd->device_identifier_type]; | |
1452 | while (i < (4 + page_83[3])) { | |
1453 | vpd->device_identifier[j++] = | |
1454 | hex_str[(page_83[i] & 0xf0) >> 4]; | |
1455 | vpd->device_identifier[j++] = | |
1456 | hex_str[page_83[i] & 0x0f]; | |
1457 | i++; | |
1458 | } | |
1459 | break; | |
1460 | case 0x02: /* ASCII */ | |
1461 | case 0x03: /* UTF-8 */ | |
1462 | while (i < (4 + page_83[3])) | |
1463 | vpd->device_identifier[j++] = page_83[i++]; | |
1464 | break; | |
1465 | default: | |
1466 | break; | |
1467 | } | |
1468 | ||
1469 | return transport_dump_vpd_ident(vpd, NULL, 0); | |
1470 | } | |
1471 | EXPORT_SYMBOL(transport_set_vpd_ident); | |
1472 | ||
1473 | static void core_setup_task_attr_emulation(struct se_device *dev) | |
1474 | { | |
1475 | /* | |
1476 | * If this device is from Target_Core_Mod/pSCSI, disable the | |
1477 | * SAM Task Attribute emulation. | |
1478 | * | |
1479 | * This is currently not available in upsream Linux/SCSI Target | |
1480 | * mode code, and is assumed to be disabled while using TCM/pSCSI. | |
1481 | */ | |
e3d6f909 | 1482 | if (dev->transport->transport_type == TRANSPORT_PLUGIN_PHBA_PDEV) { |
c66ac9db NB |
1483 | dev->dev_task_attr_type = SAM_TASK_ATTR_PASSTHROUGH; |
1484 | return; | |
1485 | } | |
1486 | ||
1487 | dev->dev_task_attr_type = SAM_TASK_ATTR_EMULATED; | |
1488 | DEBUG_STA("%s: Using SAM_TASK_ATTR_EMULATED for SPC: 0x%02x" | |
e3d6f909 AG |
1489 | " device\n", dev->transport->name, |
1490 | dev->transport->get_device_rev(dev)); | |
c66ac9db NB |
1491 | } |
1492 | ||
1493 | static void scsi_dump_inquiry(struct se_device *dev) | |
1494 | { | |
e3d6f909 | 1495 | struct t10_wwn *wwn = &dev->se_sub_dev->t10_wwn; |
c66ac9db NB |
1496 | int i, device_type; |
1497 | /* | |
1498 | * Print Linux/SCSI style INQUIRY formatting to the kernel ring buffer | |
1499 | */ | |
1500 | printk(" Vendor: "); | |
1501 | for (i = 0; i < 8; i++) | |
1502 | if (wwn->vendor[i] >= 0x20) | |
1503 | printk("%c", wwn->vendor[i]); | |
1504 | else | |
1505 | printk(" "); | |
1506 | ||
1507 | printk(" Model: "); | |
1508 | for (i = 0; i < 16; i++) | |
1509 | if (wwn->model[i] >= 0x20) | |
1510 | printk("%c", wwn->model[i]); | |
1511 | else | |
1512 | printk(" "); | |
1513 | ||
1514 | printk(" Revision: "); | |
1515 | for (i = 0; i < 4; i++) | |
1516 | if (wwn->revision[i] >= 0x20) | |
1517 | printk("%c", wwn->revision[i]); | |
1518 | else | |
1519 | printk(" "); | |
1520 | ||
1521 | printk("\n"); | |
1522 | ||
e3d6f909 | 1523 | device_type = dev->transport->get_device_type(dev); |
c66ac9db NB |
1524 | printk(" Type: %s ", scsi_device_type(device_type)); |
1525 | printk(" ANSI SCSI revision: %02x\n", | |
e3d6f909 | 1526 | dev->transport->get_device_rev(dev)); |
c66ac9db NB |
1527 | } |
1528 | ||
1529 | struct se_device *transport_add_device_to_core_hba( | |
1530 | struct se_hba *hba, | |
1531 | struct se_subsystem_api *transport, | |
1532 | struct se_subsystem_dev *se_dev, | |
1533 | u32 device_flags, | |
1534 | void *transport_dev, | |
1535 | struct se_dev_limits *dev_limits, | |
1536 | const char *inquiry_prod, | |
1537 | const char *inquiry_rev) | |
1538 | { | |
12a18bdc | 1539 | int force_pt; |
c66ac9db NB |
1540 | struct se_device *dev; |
1541 | ||
1542 | dev = kzalloc(sizeof(struct se_device), GFP_KERNEL); | |
1543 | if (!(dev)) { | |
1544 | printk(KERN_ERR "Unable to allocate memory for se_dev_t\n"); | |
1545 | return NULL; | |
1546 | } | |
c66ac9db | 1547 | |
e3d6f909 | 1548 | transport_init_queue_obj(&dev->dev_queue_obj); |
c66ac9db NB |
1549 | dev->dev_flags = device_flags; |
1550 | dev->dev_status |= TRANSPORT_DEVICE_DEACTIVATED; | |
1551 | dev->dev_ptr = (void *) transport_dev; | |
1552 | dev->se_hba = hba; | |
1553 | dev->se_sub_dev = se_dev; | |
1554 | dev->transport = transport; | |
1555 | atomic_set(&dev->active_cmds, 0); | |
1556 | INIT_LIST_HEAD(&dev->dev_list); | |
1557 | INIT_LIST_HEAD(&dev->dev_sep_list); | |
1558 | INIT_LIST_HEAD(&dev->dev_tmr_list); | |
1559 | INIT_LIST_HEAD(&dev->execute_task_list); | |
1560 | INIT_LIST_HEAD(&dev->delayed_cmd_list); | |
1561 | INIT_LIST_HEAD(&dev->ordered_cmd_list); | |
1562 | INIT_LIST_HEAD(&dev->state_task_list); | |
1563 | spin_lock_init(&dev->execute_task_lock); | |
1564 | spin_lock_init(&dev->delayed_cmd_lock); | |
1565 | spin_lock_init(&dev->ordered_cmd_lock); | |
1566 | spin_lock_init(&dev->state_task_lock); | |
1567 | spin_lock_init(&dev->dev_alua_lock); | |
1568 | spin_lock_init(&dev->dev_reservation_lock); | |
1569 | spin_lock_init(&dev->dev_status_lock); | |
1570 | spin_lock_init(&dev->dev_status_thr_lock); | |
1571 | spin_lock_init(&dev->se_port_lock); | |
1572 | spin_lock_init(&dev->se_tmr_lock); | |
1573 | ||
1574 | dev->queue_depth = dev_limits->queue_depth; | |
1575 | atomic_set(&dev->depth_left, dev->queue_depth); | |
1576 | atomic_set(&dev->dev_ordered_id, 0); | |
1577 | ||
1578 | se_dev_set_default_attribs(dev, dev_limits); | |
1579 | ||
1580 | dev->dev_index = scsi_get_new_index(SCSI_DEVICE_INDEX); | |
1581 | dev->creation_time = get_jiffies_64(); | |
1582 | spin_lock_init(&dev->stats_lock); | |
1583 | ||
1584 | spin_lock(&hba->device_lock); | |
1585 | list_add_tail(&dev->dev_list, &hba->hba_dev_list); | |
1586 | hba->dev_count++; | |
1587 | spin_unlock(&hba->device_lock); | |
1588 | /* | |
1589 | * Setup the SAM Task Attribute emulation for struct se_device | |
1590 | */ | |
1591 | core_setup_task_attr_emulation(dev); | |
1592 | /* | |
1593 | * Force PR and ALUA passthrough emulation with internal object use. | |
1594 | */ | |
1595 | force_pt = (hba->hba_flags & HBA_FLAGS_INTERNAL_USE); | |
1596 | /* | |
1597 | * Setup the Reservations infrastructure for struct se_device | |
1598 | */ | |
1599 | core_setup_reservations(dev, force_pt); | |
1600 | /* | |
1601 | * Setup the Asymmetric Logical Unit Assignment for struct se_device | |
1602 | */ | |
1603 | if (core_setup_alua(dev, force_pt) < 0) | |
1604 | goto out; | |
1605 | ||
1606 | /* | |
1607 | * Startup the struct se_device processing thread | |
1608 | */ | |
1609 | dev->process_thread = kthread_run(transport_processing_thread, dev, | |
e3d6f909 | 1610 | "LIO_%s", dev->transport->name); |
c66ac9db NB |
1611 | if (IS_ERR(dev->process_thread)) { |
1612 | printk(KERN_ERR "Unable to create kthread: LIO_%s\n", | |
e3d6f909 | 1613 | dev->transport->name); |
c66ac9db NB |
1614 | goto out; |
1615 | } | |
1616 | ||
1617 | /* | |
1618 | * Preload the initial INQUIRY const values if we are doing | |
1619 | * anything virtual (IBLOCK, FILEIO, RAMDISK), but not for TCM/pSCSI | |
1620 | * passthrough because this is being provided by the backend LLD. | |
1621 | * This is required so that transport_get_inquiry() copies these | |
1622 | * originals once back into DEV_T10_WWN(dev) for the virtual device | |
1623 | * setup. | |
1624 | */ | |
e3d6f909 | 1625 | if (dev->transport->transport_type != TRANSPORT_PLUGIN_PHBA_PDEV) { |
f22c1196 | 1626 | if (!inquiry_prod || !inquiry_rev) { |
c66ac9db NB |
1627 | printk(KERN_ERR "All non TCM/pSCSI plugins require" |
1628 | " INQUIRY consts\n"); | |
1629 | goto out; | |
1630 | } | |
1631 | ||
e3d6f909 AG |
1632 | strncpy(&dev->se_sub_dev->t10_wwn.vendor[0], "LIO-ORG", 8); |
1633 | strncpy(&dev->se_sub_dev->t10_wwn.model[0], inquiry_prod, 16); | |
1634 | strncpy(&dev->se_sub_dev->t10_wwn.revision[0], inquiry_rev, 4); | |
c66ac9db NB |
1635 | } |
1636 | scsi_dump_inquiry(dev); | |
1637 | ||
12a18bdc | 1638 | return dev; |
c66ac9db | 1639 | out: |
c66ac9db NB |
1640 | kthread_stop(dev->process_thread); |
1641 | ||
1642 | spin_lock(&hba->device_lock); | |
1643 | list_del(&dev->dev_list); | |
1644 | hba->dev_count--; | |
1645 | spin_unlock(&hba->device_lock); | |
1646 | ||
1647 | se_release_vpd_for_dev(dev); | |
1648 | ||
c66ac9db NB |
1649 | kfree(dev); |
1650 | ||
1651 | return NULL; | |
1652 | } | |
1653 | EXPORT_SYMBOL(transport_add_device_to_core_hba); | |
1654 | ||
1655 | /* transport_generic_prepare_cdb(): | |
1656 | * | |
1657 | * Since the Initiator sees iSCSI devices as LUNs, the SCSI CDB will | |
1658 | * contain the iSCSI LUN in bits 7-5 of byte 1 as per SAM-2. | |
1659 | * The point of this is since we are mapping iSCSI LUNs to | |
1660 | * SCSI Target IDs having a non-zero LUN in the CDB will throw the | |
1661 | * devices and HBAs for a loop. | |
1662 | */ | |
1663 | static inline void transport_generic_prepare_cdb( | |
1664 | unsigned char *cdb) | |
1665 | { | |
1666 | switch (cdb[0]) { | |
1667 | case READ_10: /* SBC - RDProtect */ | |
1668 | case READ_12: /* SBC - RDProtect */ | |
1669 | case READ_16: /* SBC - RDProtect */ | |
1670 | case SEND_DIAGNOSTIC: /* SPC - SELF-TEST Code */ | |
1671 | case VERIFY: /* SBC - VRProtect */ | |
1672 | case VERIFY_16: /* SBC - VRProtect */ | |
1673 | case WRITE_VERIFY: /* SBC - VRProtect */ | |
1674 | case WRITE_VERIFY_12: /* SBC - VRProtect */ | |
1675 | break; | |
1676 | default: | |
1677 | cdb[1] &= 0x1f; /* clear logical unit number */ | |
1678 | break; | |
1679 | } | |
1680 | } | |
1681 | ||
1682 | static struct se_task * | |
1683 | transport_generic_get_task(struct se_cmd *cmd, | |
1684 | enum dma_data_direction data_direction) | |
1685 | { | |
1686 | struct se_task *task; | |
e3d6f909 | 1687 | struct se_device *dev = cmd->se_lun->lun_se_dev; |
c66ac9db NB |
1688 | unsigned long flags; |
1689 | ||
1690 | task = dev->transport->alloc_task(cmd); | |
1691 | if (!task) { | |
1692 | printk(KERN_ERR "Unable to allocate struct se_task\n"); | |
1693 | return NULL; | |
1694 | } | |
1695 | ||
1696 | INIT_LIST_HEAD(&task->t_list); | |
1697 | INIT_LIST_HEAD(&task->t_execute_list); | |
1698 | INIT_LIST_HEAD(&task->t_state_list); | |
1699 | init_completion(&task->task_stop_comp); | |
e3d6f909 | 1700 | task->task_no = cmd->t_task->t_tasks_no++; |
c66ac9db NB |
1701 | task->task_se_cmd = cmd; |
1702 | task->se_dev = dev; | |
1703 | task->task_data_direction = data_direction; | |
1704 | ||
e3d6f909 AG |
1705 | spin_lock_irqsave(&cmd->t_task->t_state_lock, flags); |
1706 | list_add_tail(&task->t_list, &cmd->t_task->t_task_list); | |
1707 | spin_unlock_irqrestore(&cmd->t_task->t_state_lock, flags); | |
c66ac9db NB |
1708 | |
1709 | return task; | |
1710 | } | |
1711 | ||
1712 | static int transport_generic_cmd_sequencer(struct se_cmd *, unsigned char *); | |
1713 | ||
1714 | void transport_device_setup_cmd(struct se_cmd *cmd) | |
1715 | { | |
e3d6f909 | 1716 | cmd->se_dev = cmd->se_lun->lun_se_dev; |
c66ac9db NB |
1717 | } |
1718 | EXPORT_SYMBOL(transport_device_setup_cmd); | |
1719 | ||
1720 | /* | |
1721 | * Used by fabric modules containing a local struct se_cmd within their | |
1722 | * fabric dependent per I/O descriptor. | |
1723 | */ | |
1724 | void transport_init_se_cmd( | |
1725 | struct se_cmd *cmd, | |
1726 | struct target_core_fabric_ops *tfo, | |
1727 | struct se_session *se_sess, | |
1728 | u32 data_length, | |
1729 | int data_direction, | |
1730 | int task_attr, | |
1731 | unsigned char *sense_buffer) | |
1732 | { | |
1733 | INIT_LIST_HEAD(&cmd->se_lun_list); | |
1734 | INIT_LIST_HEAD(&cmd->se_delayed_list); | |
1735 | INIT_LIST_HEAD(&cmd->se_ordered_list); | |
1736 | /* | |
1737 | * Setup t_task pointer to t_task_backstore | |
1738 | */ | |
1739 | cmd->t_task = &cmd->t_task_backstore; | |
1740 | ||
e3d6f909 AG |
1741 | INIT_LIST_HEAD(&cmd->t_task->t_task_list); |
1742 | init_completion(&cmd->t_task->transport_lun_fe_stop_comp); | |
1743 | init_completion(&cmd->t_task->transport_lun_stop_comp); | |
1744 | init_completion(&cmd->t_task->t_transport_stop_comp); | |
1745 | spin_lock_init(&cmd->t_task->t_state_lock); | |
1746 | atomic_set(&cmd->t_task->transport_dev_active, 1); | |
c66ac9db NB |
1747 | |
1748 | cmd->se_tfo = tfo; | |
1749 | cmd->se_sess = se_sess; | |
1750 | cmd->data_length = data_length; | |
1751 | cmd->data_direction = data_direction; | |
1752 | cmd->sam_task_attr = task_attr; | |
1753 | cmd->sense_buffer = sense_buffer; | |
1754 | } | |
1755 | EXPORT_SYMBOL(transport_init_se_cmd); | |
1756 | ||
1757 | static int transport_check_alloc_task_attr(struct se_cmd *cmd) | |
1758 | { | |
1759 | /* | |
1760 | * Check if SAM Task Attribute emulation is enabled for this | |
1761 | * struct se_device storage object | |
1762 | */ | |
e3d6f909 | 1763 | if (cmd->se_lun->lun_se_dev->dev_task_attr_type != SAM_TASK_ATTR_EMULATED) |
c66ac9db NB |
1764 | return 0; |
1765 | ||
e66ecd50 | 1766 | if (cmd->sam_task_attr == MSG_ACA_TAG) { |
c66ac9db NB |
1767 | DEBUG_STA("SAM Task Attribute ACA" |
1768 | " emulation is not supported\n"); | |
e3d6f909 | 1769 | return -EINVAL; |
c66ac9db NB |
1770 | } |
1771 | /* | |
1772 | * Used to determine when ORDERED commands should go from | |
1773 | * Dormant to Active status. | |
1774 | */ | |
e3d6f909 | 1775 | cmd->se_ordered_id = atomic_inc_return(&cmd->se_lun->lun_se_dev->dev_ordered_id); |
c66ac9db NB |
1776 | smp_mb__after_atomic_inc(); |
1777 | DEBUG_STA("Allocated se_ordered_id: %u for Task Attr: 0x%02x on %s\n", | |
1778 | cmd->se_ordered_id, cmd->sam_task_attr, | |
1779 | TRANSPORT(cmd->se_dev)->name); | |
1780 | return 0; | |
1781 | } | |
1782 | ||
1783 | void transport_free_se_cmd( | |
1784 | struct se_cmd *se_cmd) | |
1785 | { | |
1786 | if (se_cmd->se_tmr_req) | |
1787 | core_tmr_release_req(se_cmd->se_tmr_req); | |
1788 | /* | |
1789 | * Check and free any extended CDB buffer that was allocated | |
1790 | */ | |
e3d6f909 AG |
1791 | if (se_cmd->t_task->t_task_cdb != se_cmd->t_task->__t_task_cdb) |
1792 | kfree(se_cmd->t_task->t_task_cdb); | |
c66ac9db NB |
1793 | } |
1794 | EXPORT_SYMBOL(transport_free_se_cmd); | |
1795 | ||
1796 | static void transport_generic_wait_for_tasks(struct se_cmd *, int, int); | |
1797 | ||
1798 | /* transport_generic_allocate_tasks(): | |
1799 | * | |
1800 | * Called from fabric RX Thread. | |
1801 | */ | |
1802 | int transport_generic_allocate_tasks( | |
1803 | struct se_cmd *cmd, | |
1804 | unsigned char *cdb) | |
1805 | { | |
1806 | int ret; | |
1807 | ||
1808 | transport_generic_prepare_cdb(cdb); | |
1809 | ||
1810 | /* | |
1811 | * This is needed for early exceptions. | |
1812 | */ | |
1813 | cmd->transport_wait_for_tasks = &transport_generic_wait_for_tasks; | |
1814 | ||
1815 | transport_device_setup_cmd(cmd); | |
1816 | /* | |
1817 | * Ensure that the received CDB is less than the max (252 + 8) bytes | |
1818 | * for VARIABLE_LENGTH_CMD | |
1819 | */ | |
1820 | if (scsi_command_size(cdb) > SCSI_MAX_VARLEN_CDB_SIZE) { | |
1821 | printk(KERN_ERR "Received SCSI CDB with command_size: %d that" | |
1822 | " exceeds SCSI_MAX_VARLEN_CDB_SIZE: %d\n", | |
1823 | scsi_command_size(cdb), SCSI_MAX_VARLEN_CDB_SIZE); | |
e3d6f909 | 1824 | return -EINVAL; |
c66ac9db NB |
1825 | } |
1826 | /* | |
1827 | * If the received CDB is larger than TCM_MAX_COMMAND_SIZE, | |
1828 | * allocate the additional extended CDB buffer now.. Otherwise | |
1829 | * setup the pointer from __t_task_cdb to t_task_cdb. | |
1830 | */ | |
e3d6f909 AG |
1831 | if (scsi_command_size(cdb) > sizeof(cmd->t_task->__t_task_cdb)) { |
1832 | cmd->t_task->t_task_cdb = kzalloc(scsi_command_size(cdb), | |
c66ac9db | 1833 | GFP_KERNEL); |
e3d6f909 AG |
1834 | if (!(cmd->t_task->t_task_cdb)) { |
1835 | printk(KERN_ERR "Unable to allocate cmd->t_task->t_task_cdb" | |
1836 | " %u > sizeof(cmd->t_task->__t_task_cdb): %lu ops\n", | |
c66ac9db | 1837 | scsi_command_size(cdb), |
e3d6f909 AG |
1838 | (unsigned long)sizeof(cmd->t_task->__t_task_cdb)); |
1839 | return -ENOMEM; | |
c66ac9db NB |
1840 | } |
1841 | } else | |
e3d6f909 | 1842 | cmd->t_task->t_task_cdb = &cmd->t_task->__t_task_cdb[0]; |
c66ac9db | 1843 | /* |
e3d6f909 | 1844 | * Copy the original CDB into cmd->t_task. |
c66ac9db | 1845 | */ |
e3d6f909 | 1846 | memcpy(cmd->t_task->t_task_cdb, cdb, scsi_command_size(cdb)); |
c66ac9db NB |
1847 | /* |
1848 | * Setup the received CDB based on SCSI defined opcodes and | |
1849 | * perform unit attention, persistent reservations and ALUA | |
e3d6f909 | 1850 | * checks for virtual device backends. The cmd->t_task->t_task_cdb |
c66ac9db NB |
1851 | * pointer is expected to be setup before we reach this point. |
1852 | */ | |
1853 | ret = transport_generic_cmd_sequencer(cmd, cdb); | |
1854 | if (ret < 0) | |
1855 | return ret; | |
1856 | /* | |
1857 | * Check for SAM Task Attribute Emulation | |
1858 | */ | |
1859 | if (transport_check_alloc_task_attr(cmd) < 0) { | |
1860 | cmd->se_cmd_flags |= SCF_SCSI_CDB_EXCEPTION; | |
1861 | cmd->scsi_sense_reason = TCM_INVALID_CDB_FIELD; | |
1862 | return -2; | |
1863 | } | |
1864 | spin_lock(&cmd->se_lun->lun_sep_lock); | |
1865 | if (cmd->se_lun->lun_sep) | |
1866 | cmd->se_lun->lun_sep->sep_stats.cmd_pdus++; | |
1867 | spin_unlock(&cmd->se_lun->lun_sep_lock); | |
1868 | return 0; | |
1869 | } | |
1870 | EXPORT_SYMBOL(transport_generic_allocate_tasks); | |
1871 | ||
1872 | /* | |
1873 | * Used by fabric module frontends not defining a TFO->new_cmd_map() | |
1874 | * to queue up a newly setup se_cmd w/ TRANSPORT_NEW_CMD statis | |
1875 | */ | |
1876 | int transport_generic_handle_cdb( | |
1877 | struct se_cmd *cmd) | |
1878 | { | |
e3d6f909 | 1879 | if (!cmd->se_lun) { |
c66ac9db | 1880 | dump_stack(); |
e3d6f909 AG |
1881 | printk(KERN_ERR "cmd->se_lun is NULL\n"); |
1882 | return -EINVAL; | |
c66ac9db NB |
1883 | } |
1884 | ||
1885 | transport_add_cmd_to_queue(cmd, TRANSPORT_NEW_CMD); | |
1886 | return 0; | |
1887 | } | |
1888 | EXPORT_SYMBOL(transport_generic_handle_cdb); | |
1889 | ||
1890 | /* | |
1891 | * Used by fabric module frontends defining a TFO->new_cmd_map() caller | |
1892 | * to queue up a newly setup se_cmd w/ TRANSPORT_NEW_CMD_MAP in order to | |
1893 | * complete setup in TCM process context w/ TFO->new_cmd_map(). | |
1894 | */ | |
1895 | int transport_generic_handle_cdb_map( | |
1896 | struct se_cmd *cmd) | |
1897 | { | |
e3d6f909 | 1898 | if (!cmd->se_lun) { |
c66ac9db | 1899 | dump_stack(); |
e3d6f909 AG |
1900 | printk(KERN_ERR "cmd->se_lun is NULL\n"); |
1901 | return -EINVAL; | |
c66ac9db NB |
1902 | } |
1903 | ||
1904 | transport_add_cmd_to_queue(cmd, TRANSPORT_NEW_CMD_MAP); | |
1905 | return 0; | |
1906 | } | |
1907 | EXPORT_SYMBOL(transport_generic_handle_cdb_map); | |
1908 | ||
1909 | /* transport_generic_handle_data(): | |
1910 | * | |
1911 | * | |
1912 | */ | |
1913 | int transport_generic_handle_data( | |
1914 | struct se_cmd *cmd) | |
1915 | { | |
1916 | /* | |
1917 | * For the software fabric case, then we assume the nexus is being | |
1918 | * failed/shutdown when signals are pending from the kthread context | |
1919 | * caller, so we return a failure. For the HW target mode case running | |
1920 | * in interrupt code, the signal_pending() check is skipped. | |
1921 | */ | |
1922 | if (!in_interrupt() && signal_pending(current)) | |
e3d6f909 | 1923 | return -EPERM; |
c66ac9db NB |
1924 | /* |
1925 | * If the received CDB has aleady been ABORTED by the generic | |
1926 | * target engine, we now call transport_check_aborted_status() | |
1927 | * to queue any delated TASK_ABORTED status for the received CDB to the | |
25985edc | 1928 | * fabric module as we are expecting no further incoming DATA OUT |
c66ac9db NB |
1929 | * sequences at this point. |
1930 | */ | |
1931 | if (transport_check_aborted_status(cmd, 1) != 0) | |
1932 | return 0; | |
1933 | ||
1934 | transport_add_cmd_to_queue(cmd, TRANSPORT_PROCESS_WRITE); | |
1935 | return 0; | |
1936 | } | |
1937 | EXPORT_SYMBOL(transport_generic_handle_data); | |
1938 | ||
1939 | /* transport_generic_handle_tmr(): | |
1940 | * | |
1941 | * | |
1942 | */ | |
1943 | int transport_generic_handle_tmr( | |
1944 | struct se_cmd *cmd) | |
1945 | { | |
1946 | /* | |
1947 | * This is needed for early exceptions. | |
1948 | */ | |
1949 | cmd->transport_wait_for_tasks = &transport_generic_wait_for_tasks; | |
1950 | transport_device_setup_cmd(cmd); | |
1951 | ||
1952 | transport_add_cmd_to_queue(cmd, TRANSPORT_PROCESS_TMR); | |
1953 | return 0; | |
1954 | } | |
1955 | EXPORT_SYMBOL(transport_generic_handle_tmr); | |
1956 | ||
f4366772 NB |
1957 | void transport_generic_free_cmd_intr( |
1958 | struct se_cmd *cmd) | |
1959 | { | |
1960 | transport_add_cmd_to_queue(cmd, TRANSPORT_FREE_CMD_INTR); | |
1961 | } | |
1962 | EXPORT_SYMBOL(transport_generic_free_cmd_intr); | |
1963 | ||
c66ac9db NB |
1964 | static int transport_stop_tasks_for_cmd(struct se_cmd *cmd) |
1965 | { | |
1966 | struct se_task *task, *task_tmp; | |
1967 | unsigned long flags; | |
1968 | int ret = 0; | |
1969 | ||
1970 | DEBUG_TS("ITT[0x%08x] - Stopping tasks\n", | |
e3d6f909 | 1971 | cmd->se_tfo->get_task_tag(cmd)); |
c66ac9db NB |
1972 | |
1973 | /* | |
1974 | * No tasks remain in the execution queue | |
1975 | */ | |
e3d6f909 | 1976 | spin_lock_irqsave(&cmd->t_task->t_state_lock, flags); |
c66ac9db | 1977 | list_for_each_entry_safe(task, task_tmp, |
e3d6f909 | 1978 | &cmd->t_task->t_task_list, t_list) { |
c66ac9db NB |
1979 | DEBUG_TS("task_no[%d] - Processing task %p\n", |
1980 | task->task_no, task); | |
1981 | /* | |
1982 | * If the struct se_task has not been sent and is not active, | |
1983 | * remove the struct se_task from the execution queue. | |
1984 | */ | |
1985 | if (!atomic_read(&task->task_sent) && | |
1986 | !atomic_read(&task->task_active)) { | |
e3d6f909 | 1987 | spin_unlock_irqrestore(&cmd->t_task->t_state_lock, |
c66ac9db NB |
1988 | flags); |
1989 | transport_remove_task_from_execute_queue(task, | |
1990 | task->se_dev); | |
1991 | ||
1992 | DEBUG_TS("task_no[%d] - Removed from execute queue\n", | |
1993 | task->task_no); | |
e3d6f909 | 1994 | spin_lock_irqsave(&cmd->t_task->t_state_lock, flags); |
c66ac9db NB |
1995 | continue; |
1996 | } | |
1997 | ||
1998 | /* | |
1999 | * If the struct se_task is active, sleep until it is returned | |
2000 | * from the plugin. | |
2001 | */ | |
2002 | if (atomic_read(&task->task_active)) { | |
2003 | atomic_set(&task->task_stop, 1); | |
e3d6f909 | 2004 | spin_unlock_irqrestore(&cmd->t_task->t_state_lock, |
c66ac9db NB |
2005 | flags); |
2006 | ||
2007 | DEBUG_TS("task_no[%d] - Waiting to complete\n", | |
2008 | task->task_no); | |
2009 | wait_for_completion(&task->task_stop_comp); | |
2010 | DEBUG_TS("task_no[%d] - Stopped successfully\n", | |
2011 | task->task_no); | |
2012 | ||
e3d6f909 AG |
2013 | spin_lock_irqsave(&cmd->t_task->t_state_lock, flags); |
2014 | atomic_dec(&cmd->t_task->t_task_cdbs_left); | |
c66ac9db NB |
2015 | |
2016 | atomic_set(&task->task_active, 0); | |
2017 | atomic_set(&task->task_stop, 0); | |
2018 | } else { | |
2019 | DEBUG_TS("task_no[%d] - Did nothing\n", task->task_no); | |
2020 | ret++; | |
2021 | } | |
2022 | ||
2023 | __transport_stop_task_timer(task, &flags); | |
2024 | } | |
e3d6f909 | 2025 | spin_unlock_irqrestore(&cmd->t_task->t_state_lock, flags); |
c66ac9db NB |
2026 | |
2027 | return ret; | |
2028 | } | |
2029 | ||
c66ac9db NB |
2030 | /* |
2031 | * Handle SAM-esque emulation for generic transport request failures. | |
2032 | */ | |
2033 | static void transport_generic_request_failure( | |
2034 | struct se_cmd *cmd, | |
2035 | struct se_device *dev, | |
2036 | int complete, | |
2037 | int sc) | |
2038 | { | |
2039 | DEBUG_GRF("-----[ Storage Engine Exception for cmd: %p ITT: 0x%08x" | |
e3d6f909 AG |
2040 | " CDB: 0x%02x\n", cmd, cmd->se_tfo->get_task_tag(cmd), |
2041 | cmd->t_task->t_task_cdb[0]); | |
c66ac9db NB |
2042 | DEBUG_GRF("-----[ i_state: %d t_state/def_t_state:" |
2043 | " %d/%d transport_error_status: %d\n", | |
e3d6f909 | 2044 | cmd->se_tfo->get_cmd_state(cmd), |
c66ac9db NB |
2045 | cmd->t_state, cmd->deferred_t_state, |
2046 | cmd->transport_error_status); | |
2047 | DEBUG_GRF("-----[ t_task_cdbs: %d t_task_cdbs_left: %d" | |
2048 | " t_task_cdbs_sent: %d t_task_cdbs_ex_left: %d --" | |
2049 | " t_transport_active: %d t_transport_stop: %d" | |
e3d6f909 AG |
2050 | " t_transport_sent: %d\n", cmd->t_task->t_task_cdbs, |
2051 | atomic_read(&cmd->t_task->t_task_cdbs_left), | |
2052 | atomic_read(&cmd->t_task->t_task_cdbs_sent), | |
2053 | atomic_read(&cmd->t_task->t_task_cdbs_ex_left), | |
2054 | atomic_read(&cmd->t_task->t_transport_active), | |
2055 | atomic_read(&cmd->t_task->t_transport_stop), | |
2056 | atomic_read(&cmd->t_task->t_transport_sent)); | |
c66ac9db NB |
2057 | |
2058 | transport_stop_all_task_timers(cmd); | |
2059 | ||
2060 | if (dev) | |
e3d6f909 | 2061 | atomic_inc(&dev->depth_left); |
c66ac9db NB |
2062 | /* |
2063 | * For SAM Task Attribute emulation for failed struct se_cmd | |
2064 | */ | |
2065 | if (cmd->se_dev->dev_task_attr_type == SAM_TASK_ATTR_EMULATED) | |
2066 | transport_complete_task_attr(cmd); | |
2067 | ||
2068 | if (complete) { | |
2069 | transport_direct_request_timeout(cmd); | |
2070 | cmd->transport_error_status = PYX_TRANSPORT_LU_COMM_FAILURE; | |
2071 | } | |
2072 | ||
2073 | switch (cmd->transport_error_status) { | |
2074 | case PYX_TRANSPORT_UNKNOWN_SAM_OPCODE: | |
2075 | cmd->scsi_sense_reason = TCM_UNSUPPORTED_SCSI_OPCODE; | |
2076 | break; | |
2077 | case PYX_TRANSPORT_REQ_TOO_MANY_SECTORS: | |
2078 | cmd->scsi_sense_reason = TCM_SECTOR_COUNT_TOO_MANY; | |
2079 | break; | |
2080 | case PYX_TRANSPORT_INVALID_CDB_FIELD: | |
2081 | cmd->scsi_sense_reason = TCM_INVALID_CDB_FIELD; | |
2082 | break; | |
2083 | case PYX_TRANSPORT_INVALID_PARAMETER_LIST: | |
2084 | cmd->scsi_sense_reason = TCM_INVALID_PARAMETER_LIST; | |
2085 | break; | |
2086 | case PYX_TRANSPORT_OUT_OF_MEMORY_RESOURCES: | |
2087 | if (!sc) | |
2088 | transport_new_cmd_failure(cmd); | |
2089 | /* | |
2090 | * Currently for PYX_TRANSPORT_OUT_OF_MEMORY_RESOURCES, | |
2091 | * we force this session to fall back to session | |
2092 | * recovery. | |
2093 | */ | |
e3d6f909 AG |
2094 | cmd->se_tfo->fall_back_to_erl0(cmd->se_sess); |
2095 | cmd->se_tfo->stop_session(cmd->se_sess, 0, 0); | |
c66ac9db NB |
2096 | |
2097 | goto check_stop; | |
2098 | case PYX_TRANSPORT_LU_COMM_FAILURE: | |
2099 | case PYX_TRANSPORT_ILLEGAL_REQUEST: | |
2100 | cmd->scsi_sense_reason = TCM_LOGICAL_UNIT_COMMUNICATION_FAILURE; | |
2101 | break; | |
2102 | case PYX_TRANSPORT_UNKNOWN_MODE_PAGE: | |
2103 | cmd->scsi_sense_reason = TCM_UNKNOWN_MODE_PAGE; | |
2104 | break; | |
2105 | case PYX_TRANSPORT_WRITE_PROTECTED: | |
2106 | cmd->scsi_sense_reason = TCM_WRITE_PROTECTED; | |
2107 | break; | |
2108 | case PYX_TRANSPORT_RESERVATION_CONFLICT: | |
2109 | /* | |
2110 | * No SENSE Data payload for this case, set SCSI Status | |
2111 | * and queue the response to $FABRIC_MOD. | |
2112 | * | |
2113 | * Uses linux/include/scsi/scsi.h SAM status codes defs | |
2114 | */ | |
2115 | cmd->scsi_status = SAM_STAT_RESERVATION_CONFLICT; | |
2116 | /* | |
2117 | * For UA Interlock Code 11b, a RESERVATION CONFLICT will | |
2118 | * establish a UNIT ATTENTION with PREVIOUS RESERVATION | |
2119 | * CONFLICT STATUS. | |
2120 | * | |
2121 | * See spc4r17, section 7.4.6 Control Mode Page, Table 349 | |
2122 | */ | |
e3d6f909 AG |
2123 | if (cmd->se_sess && |
2124 | cmd->se_dev->se_sub_dev->se_dev_attrib.emulate_ua_intlck_ctrl == 2) | |
2125 | core_scsi3_ua_allocate(cmd->se_sess->se_node_acl, | |
c66ac9db NB |
2126 | cmd->orig_fe_lun, 0x2C, |
2127 | ASCQ_2CH_PREVIOUS_RESERVATION_CONFLICT_STATUS); | |
2128 | ||
e3d6f909 | 2129 | cmd->se_tfo->queue_status(cmd); |
c66ac9db NB |
2130 | goto check_stop; |
2131 | case PYX_TRANSPORT_USE_SENSE_REASON: | |
2132 | /* | |
2133 | * struct se_cmd->scsi_sense_reason already set | |
2134 | */ | |
2135 | break; | |
2136 | default: | |
2137 | printk(KERN_ERR "Unknown transport error for CDB 0x%02x: %d\n", | |
e3d6f909 | 2138 | cmd->t_task->t_task_cdb[0], |
c66ac9db NB |
2139 | cmd->transport_error_status); |
2140 | cmd->scsi_sense_reason = TCM_UNSUPPORTED_SCSI_OPCODE; | |
2141 | break; | |
2142 | } | |
2143 | ||
2144 | if (!sc) | |
2145 | transport_new_cmd_failure(cmd); | |
2146 | else | |
2147 | transport_send_check_condition_and_sense(cmd, | |
2148 | cmd->scsi_sense_reason, 0); | |
2149 | check_stop: | |
2150 | transport_lun_remove_cmd(cmd); | |
2151 | if (!(transport_cmd_check_stop_to_fabric(cmd))) | |
2152 | ; | |
2153 | } | |
2154 | ||
2155 | static void transport_direct_request_timeout(struct se_cmd *cmd) | |
2156 | { | |
2157 | unsigned long flags; | |
2158 | ||
e3d6f909 AG |
2159 | spin_lock_irqsave(&cmd->t_task->t_state_lock, flags); |
2160 | if (!(atomic_read(&cmd->t_task->t_transport_timeout))) { | |
2161 | spin_unlock_irqrestore(&cmd->t_task->t_state_lock, flags); | |
c66ac9db NB |
2162 | return; |
2163 | } | |
e3d6f909 AG |
2164 | if (atomic_read(&cmd->t_task->t_task_cdbs_timeout_left)) { |
2165 | spin_unlock_irqrestore(&cmd->t_task->t_state_lock, flags); | |
c66ac9db NB |
2166 | return; |
2167 | } | |
2168 | ||
e3d6f909 AG |
2169 | atomic_sub(atomic_read(&cmd->t_task->t_transport_timeout), |
2170 | &cmd->t_task->t_se_count); | |
2171 | spin_unlock_irqrestore(&cmd->t_task->t_state_lock, flags); | |
c66ac9db NB |
2172 | } |
2173 | ||
2174 | static void transport_generic_request_timeout(struct se_cmd *cmd) | |
2175 | { | |
2176 | unsigned long flags; | |
2177 | ||
2178 | /* | |
e3d6f909 | 2179 | * Reset cmd->t_task->t_se_count to allow transport_generic_remove() |
c66ac9db NB |
2180 | * to allow last call to free memory resources. |
2181 | */ | |
e3d6f909 AG |
2182 | spin_lock_irqsave(&cmd->t_task->t_state_lock, flags); |
2183 | if (atomic_read(&cmd->t_task->t_transport_timeout) > 1) { | |
2184 | int tmp = (atomic_read(&cmd->t_task->t_transport_timeout) - 1); | |
c66ac9db | 2185 | |
e3d6f909 | 2186 | atomic_sub(tmp, &cmd->t_task->t_se_count); |
c66ac9db | 2187 | } |
e3d6f909 | 2188 | spin_unlock_irqrestore(&cmd->t_task->t_state_lock, flags); |
c66ac9db NB |
2189 | |
2190 | transport_generic_remove(cmd, 0, 0); | |
2191 | } | |
2192 | ||
2193 | static int | |
2194 | transport_generic_allocate_buf(struct se_cmd *cmd, u32 data_length) | |
2195 | { | |
2196 | unsigned char *buf; | |
2197 | ||
2198 | buf = kzalloc(data_length, GFP_KERNEL); | |
2199 | if (!(buf)) { | |
2200 | printk(KERN_ERR "Unable to allocate memory for buffer\n"); | |
e3d6f909 | 2201 | return -ENOMEM; |
c66ac9db NB |
2202 | } |
2203 | ||
e3d6f909 AG |
2204 | cmd->t_task->t_tasks_se_num = 0; |
2205 | cmd->t_task->t_task_buf = buf; | |
c66ac9db NB |
2206 | |
2207 | return 0; | |
2208 | } | |
2209 | ||
2210 | static inline u32 transport_lba_21(unsigned char *cdb) | |
2211 | { | |
2212 | return ((cdb[1] & 0x1f) << 16) | (cdb[2] << 8) | cdb[3]; | |
2213 | } | |
2214 | ||
2215 | static inline u32 transport_lba_32(unsigned char *cdb) | |
2216 | { | |
2217 | return (cdb[2] << 24) | (cdb[3] << 16) | (cdb[4] << 8) | cdb[5]; | |
2218 | } | |
2219 | ||
2220 | static inline unsigned long long transport_lba_64(unsigned char *cdb) | |
2221 | { | |
2222 | unsigned int __v1, __v2; | |
2223 | ||
2224 | __v1 = (cdb[2] << 24) | (cdb[3] << 16) | (cdb[4] << 8) | cdb[5]; | |
2225 | __v2 = (cdb[6] << 24) | (cdb[7] << 16) | (cdb[8] << 8) | cdb[9]; | |
2226 | ||
2227 | return ((unsigned long long)__v2) | (unsigned long long)__v1 << 32; | |
2228 | } | |
2229 | ||
2230 | /* | |
2231 | * For VARIABLE_LENGTH_CDB w/ 32 byte extended CDBs | |
2232 | */ | |
2233 | static inline unsigned long long transport_lba_64_ext(unsigned char *cdb) | |
2234 | { | |
2235 | unsigned int __v1, __v2; | |
2236 | ||
2237 | __v1 = (cdb[12] << 24) | (cdb[13] << 16) | (cdb[14] << 8) | cdb[15]; | |
2238 | __v2 = (cdb[16] << 24) | (cdb[17] << 16) | (cdb[18] << 8) | cdb[19]; | |
2239 | ||
2240 | return ((unsigned long long)__v2) | (unsigned long long)__v1 << 32; | |
2241 | } | |
2242 | ||
2243 | static void transport_set_supported_SAM_opcode(struct se_cmd *se_cmd) | |
2244 | { | |
2245 | unsigned long flags; | |
2246 | ||
e3d6f909 | 2247 | spin_lock_irqsave(&se_cmd->t_task->t_state_lock, flags); |
c66ac9db | 2248 | se_cmd->se_cmd_flags |= SCF_SUPPORTED_SAM_OPCODE; |
e3d6f909 | 2249 | spin_unlock_irqrestore(&se_cmd->t_task->t_state_lock, flags); |
c66ac9db NB |
2250 | } |
2251 | ||
2252 | /* | |
2253 | * Called from interrupt context. | |
2254 | */ | |
2255 | static void transport_task_timeout_handler(unsigned long data) | |
2256 | { | |
2257 | struct se_task *task = (struct se_task *)data; | |
e3d6f909 | 2258 | struct se_cmd *cmd = task->task_se_cmd; |
c66ac9db NB |
2259 | unsigned long flags; |
2260 | ||
2261 | DEBUG_TT("transport task timeout fired! task: %p cmd: %p\n", task, cmd); | |
2262 | ||
e3d6f909 | 2263 | spin_lock_irqsave(&cmd->t_task->t_state_lock, flags); |
c66ac9db | 2264 | if (task->task_flags & TF_STOP) { |
e3d6f909 | 2265 | spin_unlock_irqrestore(&cmd->t_task->t_state_lock, flags); |
c66ac9db NB |
2266 | return; |
2267 | } | |
2268 | task->task_flags &= ~TF_RUNNING; | |
2269 | ||
2270 | /* | |
2271 | * Determine if transport_complete_task() has already been called. | |
2272 | */ | |
2273 | if (!(atomic_read(&task->task_active))) { | |
2274 | DEBUG_TT("transport task: %p cmd: %p timeout task_active" | |
2275 | " == 0\n", task, cmd); | |
e3d6f909 | 2276 | spin_unlock_irqrestore(&cmd->t_task->t_state_lock, flags); |
c66ac9db NB |
2277 | return; |
2278 | } | |
2279 | ||
e3d6f909 AG |
2280 | atomic_inc(&cmd->t_task->t_se_count); |
2281 | atomic_inc(&cmd->t_task->t_transport_timeout); | |
2282 | cmd->t_task->t_tasks_failed = 1; | |
c66ac9db NB |
2283 | |
2284 | atomic_set(&task->task_timeout, 1); | |
2285 | task->task_error_status = PYX_TRANSPORT_TASK_TIMEOUT; | |
2286 | task->task_scsi_status = 1; | |
2287 | ||
2288 | if (atomic_read(&task->task_stop)) { | |
2289 | DEBUG_TT("transport task: %p cmd: %p timeout task_stop" | |
2290 | " == 1\n", task, cmd); | |
e3d6f909 | 2291 | spin_unlock_irqrestore(&cmd->t_task->t_state_lock, flags); |
c66ac9db NB |
2292 | complete(&task->task_stop_comp); |
2293 | return; | |
2294 | } | |
2295 | ||
e3d6f909 | 2296 | if (!(atomic_dec_and_test(&cmd->t_task->t_task_cdbs_left))) { |
c66ac9db NB |
2297 | DEBUG_TT("transport task: %p cmd: %p timeout non zero" |
2298 | " t_task_cdbs_left\n", task, cmd); | |
e3d6f909 | 2299 | spin_unlock_irqrestore(&cmd->t_task->t_state_lock, flags); |
c66ac9db NB |
2300 | return; |
2301 | } | |
2302 | DEBUG_TT("transport task: %p cmd: %p timeout ZERO t_task_cdbs_left\n", | |
2303 | task, cmd); | |
2304 | ||
2305 | cmd->t_state = TRANSPORT_COMPLETE_FAILURE; | |
e3d6f909 | 2306 | spin_unlock_irqrestore(&cmd->t_task->t_state_lock, flags); |
c66ac9db NB |
2307 | |
2308 | transport_add_cmd_to_queue(cmd, TRANSPORT_COMPLETE_FAILURE); | |
2309 | } | |
2310 | ||
2311 | /* | |
e3d6f909 | 2312 | * Called with cmd->t_task->t_state_lock held. |
c66ac9db NB |
2313 | */ |
2314 | static void transport_start_task_timer(struct se_task *task) | |
2315 | { | |
2316 | struct se_device *dev = task->se_dev; | |
2317 | int timeout; | |
2318 | ||
2319 | if (task->task_flags & TF_RUNNING) | |
2320 | return; | |
2321 | /* | |
2322 | * If the task_timeout is disabled, exit now. | |
2323 | */ | |
e3d6f909 | 2324 | timeout = dev->se_sub_dev->se_dev_attrib.task_timeout; |
c66ac9db NB |
2325 | if (!(timeout)) |
2326 | return; | |
2327 | ||
2328 | init_timer(&task->task_timer); | |
2329 | task->task_timer.expires = (get_jiffies_64() + timeout * HZ); | |
2330 | task->task_timer.data = (unsigned long) task; | |
2331 | task->task_timer.function = transport_task_timeout_handler; | |
2332 | ||
2333 | task->task_flags |= TF_RUNNING; | |
2334 | add_timer(&task->task_timer); | |
2335 | #if 0 | |
2336 | printk(KERN_INFO "Starting task timer for cmd: %p task: %p seconds:" | |
2337 | " %d\n", task->task_se_cmd, task, timeout); | |
2338 | #endif | |
2339 | } | |
2340 | ||
2341 | /* | |
e3d6f909 | 2342 | * Called with spin_lock_irq(&cmd->t_task->t_state_lock) held. |
c66ac9db NB |
2343 | */ |
2344 | void __transport_stop_task_timer(struct se_task *task, unsigned long *flags) | |
2345 | { | |
e3d6f909 | 2346 | struct se_cmd *cmd = task->task_se_cmd; |
c66ac9db NB |
2347 | |
2348 | if (!(task->task_flags & TF_RUNNING)) | |
2349 | return; | |
2350 | ||
2351 | task->task_flags |= TF_STOP; | |
e3d6f909 | 2352 | spin_unlock_irqrestore(&cmd->t_task->t_state_lock, *flags); |
c66ac9db NB |
2353 | |
2354 | del_timer_sync(&task->task_timer); | |
2355 | ||
e3d6f909 | 2356 | spin_lock_irqsave(&cmd->t_task->t_state_lock, *flags); |
c66ac9db NB |
2357 | task->task_flags &= ~TF_RUNNING; |
2358 | task->task_flags &= ~TF_STOP; | |
2359 | } | |
2360 | ||
2361 | static void transport_stop_all_task_timers(struct se_cmd *cmd) | |
2362 | { | |
2363 | struct se_task *task = NULL, *task_tmp; | |
2364 | unsigned long flags; | |
2365 | ||
e3d6f909 | 2366 | spin_lock_irqsave(&cmd->t_task->t_state_lock, flags); |
c66ac9db | 2367 | list_for_each_entry_safe(task, task_tmp, |
e3d6f909 | 2368 | &cmd->t_task->t_task_list, t_list) |
c66ac9db | 2369 | __transport_stop_task_timer(task, &flags); |
e3d6f909 | 2370 | spin_unlock_irqrestore(&cmd->t_task->t_state_lock, flags); |
c66ac9db NB |
2371 | } |
2372 | ||
2373 | static inline int transport_tcq_window_closed(struct se_device *dev) | |
2374 | { | |
2375 | if (dev->dev_tcq_window_closed++ < | |
2376 | PYX_TRANSPORT_WINDOW_CLOSED_THRESHOLD) { | |
2377 | msleep(PYX_TRANSPORT_WINDOW_CLOSED_WAIT_SHORT); | |
2378 | } else | |
2379 | msleep(PYX_TRANSPORT_WINDOW_CLOSED_WAIT_LONG); | |
2380 | ||
e3d6f909 | 2381 | wake_up_interruptible(&dev->dev_queue_obj.thread_wq); |
c66ac9db NB |
2382 | return 0; |
2383 | } | |
2384 | ||
2385 | /* | |
2386 | * Called from Fabric Module context from transport_execute_tasks() | |
2387 | * | |
2388 | * The return of this function determins if the tasks from struct se_cmd | |
2389 | * get added to the execution queue in transport_execute_tasks(), | |
2390 | * or are added to the delayed or ordered lists here. | |
2391 | */ | |
2392 | static inline int transport_execute_task_attr(struct se_cmd *cmd) | |
2393 | { | |
e3d6f909 | 2394 | if (cmd->se_lun->lun_se_dev->dev_task_attr_type != SAM_TASK_ATTR_EMULATED) |
c66ac9db NB |
2395 | return 1; |
2396 | /* | |
25985edc | 2397 | * Check for the existence of HEAD_OF_QUEUE, and if true return 1 |
c66ac9db NB |
2398 | * to allow the passed struct se_cmd list of tasks to the front of the list. |
2399 | */ | |
e66ecd50 | 2400 | if (cmd->sam_task_attr == MSG_HEAD_TAG) { |
e3d6f909 | 2401 | atomic_inc(&cmd->se_lun->lun_se_dev->dev_hoq_count); |
c66ac9db NB |
2402 | smp_mb__after_atomic_inc(); |
2403 | DEBUG_STA("Added HEAD_OF_QUEUE for CDB:" | |
2404 | " 0x%02x, se_ordered_id: %u\n", | |
e3d6f909 | 2405 | cmd->t_task->t_task_cdb[0], |
c66ac9db NB |
2406 | cmd->se_ordered_id); |
2407 | return 1; | |
e66ecd50 | 2408 | } else if (cmd->sam_task_attr == MSG_ORDERED_TAG) { |
e3d6f909 | 2409 | spin_lock(&cmd->se_lun->lun_se_dev->ordered_cmd_lock); |
c66ac9db | 2410 | list_add_tail(&cmd->se_ordered_list, |
e3d6f909 AG |
2411 | &cmd->se_lun->lun_se_dev->ordered_cmd_list); |
2412 | spin_unlock(&cmd->se_lun->lun_se_dev->ordered_cmd_lock); | |
c66ac9db | 2413 | |
e3d6f909 | 2414 | atomic_inc(&cmd->se_lun->lun_se_dev->dev_ordered_sync); |
c66ac9db NB |
2415 | smp_mb__after_atomic_inc(); |
2416 | ||
2417 | DEBUG_STA("Added ORDERED for CDB: 0x%02x to ordered" | |
2418 | " list, se_ordered_id: %u\n", | |
e3d6f909 | 2419 | cmd->t_task->t_task_cdb[0], |
c66ac9db NB |
2420 | cmd->se_ordered_id); |
2421 | /* | |
2422 | * Add ORDERED command to tail of execution queue if | |
2423 | * no other older commands exist that need to be | |
2424 | * completed first. | |
2425 | */ | |
e3d6f909 | 2426 | if (!(atomic_read(&cmd->se_lun->lun_se_dev->simple_cmds))) |
c66ac9db NB |
2427 | return 1; |
2428 | } else { | |
2429 | /* | |
2430 | * For SIMPLE and UNTAGGED Task Attribute commands | |
2431 | */ | |
e3d6f909 | 2432 | atomic_inc(&cmd->se_lun->lun_se_dev->simple_cmds); |
c66ac9db NB |
2433 | smp_mb__after_atomic_inc(); |
2434 | } | |
2435 | /* | |
2436 | * Otherwise if one or more outstanding ORDERED task attribute exist, | |
2437 | * add the dormant task(s) built for the passed struct se_cmd to the | |
2438 | * execution queue and become in Active state for this struct se_device. | |
2439 | */ | |
e3d6f909 | 2440 | if (atomic_read(&cmd->se_lun->lun_se_dev->dev_ordered_sync) != 0) { |
c66ac9db NB |
2441 | /* |
2442 | * Otherwise, add cmd w/ tasks to delayed cmd queue that | |
25985edc | 2443 | * will be drained upon completion of HEAD_OF_QUEUE task. |
c66ac9db | 2444 | */ |
e3d6f909 | 2445 | spin_lock(&cmd->se_lun->lun_se_dev->delayed_cmd_lock); |
c66ac9db NB |
2446 | cmd->se_cmd_flags |= SCF_DELAYED_CMD_FROM_SAM_ATTR; |
2447 | list_add_tail(&cmd->se_delayed_list, | |
e3d6f909 AG |
2448 | &cmd->se_lun->lun_se_dev->delayed_cmd_list); |
2449 | spin_unlock(&cmd->se_lun->lun_se_dev->delayed_cmd_lock); | |
c66ac9db NB |
2450 | |
2451 | DEBUG_STA("Added CDB: 0x%02x Task Attr: 0x%02x to" | |
2452 | " delayed CMD list, se_ordered_id: %u\n", | |
e3d6f909 | 2453 | cmd->t_task->t_task_cdb[0], cmd->sam_task_attr, |
c66ac9db NB |
2454 | cmd->se_ordered_id); |
2455 | /* | |
2456 | * Return zero to let transport_execute_tasks() know | |
2457 | * not to add the delayed tasks to the execution list. | |
2458 | */ | |
2459 | return 0; | |
2460 | } | |
2461 | /* | |
2462 | * Otherwise, no ORDERED task attributes exist.. | |
2463 | */ | |
2464 | return 1; | |
2465 | } | |
2466 | ||
2467 | /* | |
2468 | * Called from fabric module context in transport_generic_new_cmd() and | |
2469 | * transport_generic_process_write() | |
2470 | */ | |
2471 | static int transport_execute_tasks(struct se_cmd *cmd) | |
2472 | { | |
2473 | int add_tasks; | |
2474 | ||
2475 | if (!(cmd->se_cmd_flags & SCF_SE_DISABLE_ONLINE_CHECK)) { | |
2476 | if (se_dev_check_online(cmd->se_orig_obj_ptr) != 0) { | |
2477 | cmd->transport_error_status = | |
2478 | PYX_TRANSPORT_LU_COMM_FAILURE; | |
2479 | transport_generic_request_failure(cmd, NULL, 0, 1); | |
2480 | return 0; | |
2481 | } | |
2482 | } | |
2483 | /* | |
2484 | * Call transport_cmd_check_stop() to see if a fabric exception | |
25985edc | 2485 | * has occurred that prevents execution. |
c66ac9db NB |
2486 | */ |
2487 | if (!(transport_cmd_check_stop(cmd, 0, TRANSPORT_PROCESSING))) { | |
2488 | /* | |
2489 | * Check for SAM Task Attribute emulation and HEAD_OF_QUEUE | |
2490 | * attribute for the tasks of the received struct se_cmd CDB | |
2491 | */ | |
2492 | add_tasks = transport_execute_task_attr(cmd); | |
e3d6f909 | 2493 | if (!add_tasks) |
c66ac9db NB |
2494 | goto execute_tasks; |
2495 | /* | |
2496 | * This calls transport_add_tasks_from_cmd() to handle | |
2497 | * HEAD_OF_QUEUE ordering for SAM Task Attribute emulation | |
2498 | * (if enabled) in __transport_add_task_to_execute_queue() and | |
2499 | * transport_add_task_check_sam_attr(). | |
2500 | */ | |
2501 | transport_add_tasks_from_cmd(cmd); | |
2502 | } | |
2503 | /* | |
2504 | * Kick the execution queue for the cmd associated struct se_device | |
2505 | * storage object. | |
2506 | */ | |
2507 | execute_tasks: | |
e3d6f909 | 2508 | __transport_execute_tasks(cmd->se_lun->lun_se_dev); |
c66ac9db NB |
2509 | return 0; |
2510 | } | |
2511 | ||
2512 | /* | |
2513 | * Called to check struct se_device tcq depth window, and once open pull struct se_task | |
2514 | * from struct se_device->execute_task_list and | |
2515 | * | |
2516 | * Called from transport_processing_thread() | |
2517 | */ | |
2518 | static int __transport_execute_tasks(struct se_device *dev) | |
2519 | { | |
2520 | int error; | |
2521 | struct se_cmd *cmd = NULL; | |
e3d6f909 | 2522 | struct se_task *task = NULL; |
c66ac9db NB |
2523 | unsigned long flags; |
2524 | ||
2525 | /* | |
2526 | * Check if there is enough room in the device and HBA queue to send | |
2527 | * struct se_transport_task's to the selected transport. | |
2528 | */ | |
2529 | check_depth: | |
e3d6f909 | 2530 | if (!atomic_read(&dev->depth_left)) |
c66ac9db | 2531 | return transport_tcq_window_closed(dev); |
c66ac9db | 2532 | |
e3d6f909 | 2533 | dev->dev_tcq_window_closed = 0; |
c66ac9db | 2534 | |
e3d6f909 AG |
2535 | spin_lock_irq(&dev->execute_task_lock); |
2536 | if (list_empty(&dev->execute_task_list)) { | |
2537 | spin_unlock_irq(&dev->execute_task_lock); | |
c66ac9db NB |
2538 | return 0; |
2539 | } | |
e3d6f909 AG |
2540 | task = list_first_entry(&dev->execute_task_list, |
2541 | struct se_task, t_execute_list); | |
2542 | list_del(&task->t_execute_list); | |
2543 | atomic_set(&task->task_execute_queue, 0); | |
2544 | atomic_dec(&dev->execute_tasks); | |
2545 | spin_unlock_irq(&dev->execute_task_lock); | |
c66ac9db NB |
2546 | |
2547 | atomic_dec(&dev->depth_left); | |
c66ac9db | 2548 | |
e3d6f909 | 2549 | cmd = task->task_se_cmd; |
c66ac9db | 2550 | |
e3d6f909 | 2551 | spin_lock_irqsave(&cmd->t_task->t_state_lock, flags); |
c66ac9db NB |
2552 | atomic_set(&task->task_active, 1); |
2553 | atomic_set(&task->task_sent, 1); | |
e3d6f909 | 2554 | atomic_inc(&cmd->t_task->t_task_cdbs_sent); |
c66ac9db | 2555 | |
e3d6f909 AG |
2556 | if (atomic_read(&cmd->t_task->t_task_cdbs_sent) == |
2557 | cmd->t_task->t_task_cdbs) | |
c66ac9db NB |
2558 | atomic_set(&cmd->transport_sent, 1); |
2559 | ||
2560 | transport_start_task_timer(task); | |
e3d6f909 | 2561 | spin_unlock_irqrestore(&cmd->t_task->t_state_lock, flags); |
c66ac9db NB |
2562 | /* |
2563 | * The struct se_cmd->transport_emulate_cdb() function pointer is used | |
e3d6f909 | 2564 | * to grab REPORT_LUNS and other CDBs we want to handle before they hit the |
c66ac9db NB |
2565 | * struct se_subsystem_api->do_task() caller below. |
2566 | */ | |
2567 | if (cmd->transport_emulate_cdb) { | |
2568 | error = cmd->transport_emulate_cdb(cmd); | |
2569 | if (error != 0) { | |
2570 | cmd->transport_error_status = error; | |
2571 | atomic_set(&task->task_active, 0); | |
2572 | atomic_set(&cmd->transport_sent, 0); | |
2573 | transport_stop_tasks_for_cmd(cmd); | |
2574 | transport_generic_request_failure(cmd, dev, 0, 1); | |
2575 | goto check_depth; | |
2576 | } | |
2577 | /* | |
2578 | * Handle the successful completion for transport_emulate_cdb() | |
2579 | * for synchronous operation, following SCF_EMULATE_CDB_ASYNC | |
2580 | * Otherwise the caller is expected to complete the task with | |
2581 | * proper status. | |
2582 | */ | |
2583 | if (!(cmd->se_cmd_flags & SCF_EMULATE_CDB_ASYNC)) { | |
2584 | cmd->scsi_status = SAM_STAT_GOOD; | |
2585 | task->task_scsi_status = GOOD; | |
2586 | transport_complete_task(task, 1); | |
2587 | } | |
2588 | } else { | |
2589 | /* | |
2590 | * Currently for all virtual TCM plugins including IBLOCK, FILEIO and | |
2591 | * RAMDISK we use the internal transport_emulate_control_cdb() logic | |
2592 | * with struct se_subsystem_api callers for the primary SPC-3 TYPE_DISK | |
2593 | * LUN emulation code. | |
2594 | * | |
2595 | * For TCM/pSCSI and all other SCF_SCSI_DATA_SG_IO_CDB I/O tasks we | |
2596 | * call ->do_task() directly and let the underlying TCM subsystem plugin | |
2597 | * code handle the CDB emulation. | |
2598 | */ | |
e3d6f909 AG |
2599 | if ((dev->transport->transport_type != TRANSPORT_PLUGIN_PHBA_PDEV) && |
2600 | (!(task->task_se_cmd->se_cmd_flags & SCF_SCSI_DATA_SG_IO_CDB))) | |
c66ac9db NB |
2601 | error = transport_emulate_control_cdb(task); |
2602 | else | |
e3d6f909 | 2603 | error = dev->transport->do_task(task); |
c66ac9db NB |
2604 | |
2605 | if (error != 0) { | |
2606 | cmd->transport_error_status = error; | |
2607 | atomic_set(&task->task_active, 0); | |
2608 | atomic_set(&cmd->transport_sent, 0); | |
2609 | transport_stop_tasks_for_cmd(cmd); | |
2610 | transport_generic_request_failure(cmd, dev, 0, 1); | |
2611 | } | |
2612 | } | |
2613 | ||
2614 | goto check_depth; | |
2615 | ||
2616 | return 0; | |
2617 | } | |
2618 | ||
2619 | void transport_new_cmd_failure(struct se_cmd *se_cmd) | |
2620 | { | |
2621 | unsigned long flags; | |
2622 | /* | |
2623 | * Any unsolicited data will get dumped for failed command inside of | |
2624 | * the fabric plugin | |
2625 | */ | |
e3d6f909 | 2626 | spin_lock_irqsave(&se_cmd->t_task->t_state_lock, flags); |
c66ac9db NB |
2627 | se_cmd->se_cmd_flags |= SCF_SE_CMD_FAILED; |
2628 | se_cmd->se_cmd_flags |= SCF_SCSI_CDB_EXCEPTION; | |
e3d6f909 | 2629 | spin_unlock_irqrestore(&se_cmd->t_task->t_state_lock, flags); |
c66ac9db | 2630 | |
e3d6f909 | 2631 | se_cmd->se_tfo->new_cmd_failure(se_cmd); |
c66ac9db NB |
2632 | } |
2633 | ||
2634 | static void transport_nop_wait_for_tasks(struct se_cmd *, int, int); | |
2635 | ||
2636 | static inline u32 transport_get_sectors_6( | |
2637 | unsigned char *cdb, | |
2638 | struct se_cmd *cmd, | |
2639 | int *ret) | |
2640 | { | |
e3d6f909 | 2641 | struct se_device *dev = cmd->se_lun->lun_se_dev; |
c66ac9db NB |
2642 | |
2643 | /* | |
2644 | * Assume TYPE_DISK for non struct se_device objects. | |
2645 | * Use 8-bit sector value. | |
2646 | */ | |
2647 | if (!dev) | |
2648 | goto type_disk; | |
2649 | ||
2650 | /* | |
2651 | * Use 24-bit allocation length for TYPE_TAPE. | |
2652 | */ | |
e3d6f909 | 2653 | if (dev->transport->get_device_type(dev) == TYPE_TAPE) |
c66ac9db NB |
2654 | return (u32)(cdb[2] << 16) + (cdb[3] << 8) + cdb[4]; |
2655 | ||
2656 | /* | |
2657 | * Everything else assume TYPE_DISK Sector CDB location. | |
2658 | * Use 8-bit sector value. | |
2659 | */ | |
2660 | type_disk: | |
2661 | return (u32)cdb[4]; | |
2662 | } | |
2663 | ||
2664 | static inline u32 transport_get_sectors_10( | |
2665 | unsigned char *cdb, | |
2666 | struct se_cmd *cmd, | |
2667 | int *ret) | |
2668 | { | |
e3d6f909 | 2669 | struct se_device *dev = cmd->se_lun->lun_se_dev; |
c66ac9db NB |
2670 | |
2671 | /* | |
2672 | * Assume TYPE_DISK for non struct se_device objects. | |
2673 | * Use 16-bit sector value. | |
2674 | */ | |
2675 | if (!dev) | |
2676 | goto type_disk; | |
2677 | ||
2678 | /* | |
2679 | * XXX_10 is not defined in SSC, throw an exception | |
2680 | */ | |
e3d6f909 AG |
2681 | if (dev->transport->get_device_type(dev) == TYPE_TAPE) { |
2682 | *ret = -EINVAL; | |
c66ac9db NB |
2683 | return 0; |
2684 | } | |
2685 | ||
2686 | /* | |
2687 | * Everything else assume TYPE_DISK Sector CDB location. | |
2688 | * Use 16-bit sector value. | |
2689 | */ | |
2690 | type_disk: | |
2691 | return (u32)(cdb[7] << 8) + cdb[8]; | |
2692 | } | |
2693 | ||
2694 | static inline u32 transport_get_sectors_12( | |
2695 | unsigned char *cdb, | |
2696 | struct se_cmd *cmd, | |
2697 | int *ret) | |
2698 | { | |
e3d6f909 | 2699 | struct se_device *dev = cmd->se_lun->lun_se_dev; |
c66ac9db NB |
2700 | |
2701 | /* | |
2702 | * Assume TYPE_DISK for non struct se_device objects. | |
2703 | * Use 32-bit sector value. | |
2704 | */ | |
2705 | if (!dev) | |
2706 | goto type_disk; | |
2707 | ||
2708 | /* | |
2709 | * XXX_12 is not defined in SSC, throw an exception | |
2710 | */ | |
e3d6f909 AG |
2711 | if (dev->transport->get_device_type(dev) == TYPE_TAPE) { |
2712 | *ret = -EINVAL; | |
c66ac9db NB |
2713 | return 0; |
2714 | } | |
2715 | ||
2716 | /* | |
2717 | * Everything else assume TYPE_DISK Sector CDB location. | |
2718 | * Use 32-bit sector value. | |
2719 | */ | |
2720 | type_disk: | |
2721 | return (u32)(cdb[6] << 24) + (cdb[7] << 16) + (cdb[8] << 8) + cdb[9]; | |
2722 | } | |
2723 | ||
2724 | static inline u32 transport_get_sectors_16( | |
2725 | unsigned char *cdb, | |
2726 | struct se_cmd *cmd, | |
2727 | int *ret) | |
2728 | { | |
e3d6f909 | 2729 | struct se_device *dev = cmd->se_lun->lun_se_dev; |
c66ac9db NB |
2730 | |
2731 | /* | |
2732 | * Assume TYPE_DISK for non struct se_device objects. | |
2733 | * Use 32-bit sector value. | |
2734 | */ | |
2735 | if (!dev) | |
2736 | goto type_disk; | |
2737 | ||
2738 | /* | |
2739 | * Use 24-bit allocation length for TYPE_TAPE. | |
2740 | */ | |
e3d6f909 | 2741 | if (dev->transport->get_device_type(dev) == TYPE_TAPE) |
c66ac9db NB |
2742 | return (u32)(cdb[12] << 16) + (cdb[13] << 8) + cdb[14]; |
2743 | ||
2744 | type_disk: | |
2745 | return (u32)(cdb[10] << 24) + (cdb[11] << 16) + | |
2746 | (cdb[12] << 8) + cdb[13]; | |
2747 | } | |
2748 | ||
2749 | /* | |
2750 | * Used for VARIABLE_LENGTH_CDB WRITE_32 and READ_32 variants | |
2751 | */ | |
2752 | static inline u32 transport_get_sectors_32( | |
2753 | unsigned char *cdb, | |
2754 | struct se_cmd *cmd, | |
2755 | int *ret) | |
2756 | { | |
2757 | /* | |
2758 | * Assume TYPE_DISK for non struct se_device objects. | |
2759 | * Use 32-bit sector value. | |
2760 | */ | |
2761 | return (u32)(cdb[28] << 24) + (cdb[29] << 16) + | |
2762 | (cdb[30] << 8) + cdb[31]; | |
2763 | ||
2764 | } | |
2765 | ||
2766 | static inline u32 transport_get_size( | |
2767 | u32 sectors, | |
2768 | unsigned char *cdb, | |
2769 | struct se_cmd *cmd) | |
2770 | { | |
e3d6f909 | 2771 | struct se_device *dev = cmd->se_lun->lun_se_dev; |
c66ac9db | 2772 | |
e3d6f909 | 2773 | if (dev->transport->get_device_type(dev) == TYPE_TAPE) { |
c66ac9db | 2774 | if (cdb[1] & 1) { /* sectors */ |
e3d6f909 | 2775 | return dev->se_sub_dev->se_dev_attrib.block_size * sectors; |
c66ac9db NB |
2776 | } else /* bytes */ |
2777 | return sectors; | |
2778 | } | |
2779 | #if 0 | |
2780 | printk(KERN_INFO "Returning block_size: %u, sectors: %u == %u for" | |
e3d6f909 AG |
2781 | " %s object\n", dev->se_sub_dev->se_dev_attrib.block_size, sectors, |
2782 | dev->se_sub_dev->se_dev_attrib.block_size * sectors, | |
2783 | dev->transport->name); | |
c66ac9db | 2784 | #endif |
e3d6f909 | 2785 | return dev->se_sub_dev->se_dev_attrib.block_size * sectors; |
c66ac9db NB |
2786 | } |
2787 | ||
2788 | unsigned char transport_asciihex_to_binaryhex(unsigned char val[2]) | |
2789 | { | |
2790 | unsigned char result = 0; | |
2791 | /* | |
2792 | * MSB | |
2793 | */ | |
2794 | if ((val[0] >= 'a') && (val[0] <= 'f')) | |
2795 | result = ((val[0] - 'a' + 10) & 0xf) << 4; | |
2796 | else | |
2797 | if ((val[0] >= 'A') && (val[0] <= 'F')) | |
2798 | result = ((val[0] - 'A' + 10) & 0xf) << 4; | |
2799 | else /* digit */ | |
2800 | result = ((val[0] - '0') & 0xf) << 4; | |
2801 | /* | |
2802 | * LSB | |
2803 | */ | |
2804 | if ((val[1] >= 'a') && (val[1] <= 'f')) | |
2805 | result |= ((val[1] - 'a' + 10) & 0xf); | |
2806 | else | |
2807 | if ((val[1] >= 'A') && (val[1] <= 'F')) | |
2808 | result |= ((val[1] - 'A' + 10) & 0xf); | |
2809 | else /* digit */ | |
2810 | result |= ((val[1] - '0') & 0xf); | |
2811 | ||
2812 | return result; | |
2813 | } | |
2814 | EXPORT_SYMBOL(transport_asciihex_to_binaryhex); | |
2815 | ||
2816 | static void transport_xor_callback(struct se_cmd *cmd) | |
2817 | { | |
2818 | unsigned char *buf, *addr; | |
2819 | struct se_mem *se_mem; | |
2820 | unsigned int offset; | |
2821 | int i; | |
2822 | /* | |
2823 | * From sbc3r22.pdf section 5.48 XDWRITEREAD (10) command | |
2824 | * | |
2825 | * 1) read the specified logical block(s); | |
2826 | * 2) transfer logical blocks from the data-out buffer; | |
2827 | * 3) XOR the logical blocks transferred from the data-out buffer with | |
2828 | * the logical blocks read, storing the resulting XOR data in a buffer; | |
2829 | * 4) if the DISABLE WRITE bit is set to zero, then write the logical | |
2830 | * blocks transferred from the data-out buffer; and | |
2831 | * 5) transfer the resulting XOR data to the data-in buffer. | |
2832 | */ | |
2833 | buf = kmalloc(cmd->data_length, GFP_KERNEL); | |
2834 | if (!(buf)) { | |
2835 | printk(KERN_ERR "Unable to allocate xor_callback buf\n"); | |
2836 | return; | |
2837 | } | |
2838 | /* | |
e3d6f909 | 2839 | * Copy the scatterlist WRITE buffer located at cmd->t_task->t_mem_list |
c66ac9db NB |
2840 | * into the locally allocated *buf |
2841 | */ | |
e3d6f909 | 2842 | transport_memcpy_se_mem_read_contig(cmd, buf, cmd->t_task->t_mem_list); |
c66ac9db NB |
2843 | /* |
2844 | * Now perform the XOR against the BIDI read memory located at | |
e3d6f909 | 2845 | * cmd->t_task->t_mem_bidi_list |
c66ac9db NB |
2846 | */ |
2847 | ||
2848 | offset = 0; | |
e3d6f909 | 2849 | list_for_each_entry(se_mem, cmd->t_task->t_mem_bidi_list, se_list) { |
c66ac9db NB |
2850 | addr = (unsigned char *)kmap_atomic(se_mem->se_page, KM_USER0); |
2851 | if (!(addr)) | |
2852 | goto out; | |
2853 | ||
2854 | for (i = 0; i < se_mem->se_len; i++) | |
2855 | *(addr + se_mem->se_off + i) ^= *(buf + offset + i); | |
2856 | ||
2857 | offset += se_mem->se_len; | |
2858 | kunmap_atomic(addr, KM_USER0); | |
2859 | } | |
2860 | out: | |
2861 | kfree(buf); | |
2862 | } | |
2863 | ||
2864 | /* | |
2865 | * Used to obtain Sense Data from underlying Linux/SCSI struct scsi_cmnd | |
2866 | */ | |
2867 | static int transport_get_sense_data(struct se_cmd *cmd) | |
2868 | { | |
2869 | unsigned char *buffer = cmd->sense_buffer, *sense_buffer = NULL; | |
2870 | struct se_device *dev; | |
2871 | struct se_task *task = NULL, *task_tmp; | |
2872 | unsigned long flags; | |
2873 | u32 offset = 0; | |
2874 | ||
e3d6f909 AG |
2875 | WARN_ON(!cmd->se_lun); |
2876 | ||
2877 | spin_lock_irqsave(&cmd->t_task->t_state_lock, flags); | |
c66ac9db | 2878 | if (cmd->se_cmd_flags & SCF_SENT_CHECK_CONDITION) { |
e3d6f909 | 2879 | spin_unlock_irqrestore(&cmd->t_task->t_state_lock, flags); |
c66ac9db NB |
2880 | return 0; |
2881 | } | |
2882 | ||
2883 | list_for_each_entry_safe(task, task_tmp, | |
e3d6f909 | 2884 | &cmd->t_task->t_task_list, t_list) { |
c66ac9db NB |
2885 | |
2886 | if (!task->task_sense) | |
2887 | continue; | |
2888 | ||
2889 | dev = task->se_dev; | |
2890 | if (!(dev)) | |
2891 | continue; | |
2892 | ||
e3d6f909 AG |
2893 | if (!dev->transport->get_sense_buffer) { |
2894 | printk(KERN_ERR "dev->transport->get_sense_buffer" | |
c66ac9db NB |
2895 | " is NULL\n"); |
2896 | continue; | |
2897 | } | |
2898 | ||
e3d6f909 | 2899 | sense_buffer = dev->transport->get_sense_buffer(task); |
c66ac9db NB |
2900 | if (!(sense_buffer)) { |
2901 | printk(KERN_ERR "ITT[0x%08x]_TASK[%d]: Unable to locate" | |
2902 | " sense buffer for task with sense\n", | |
e3d6f909 | 2903 | cmd->se_tfo->get_task_tag(cmd), task->task_no); |
c66ac9db NB |
2904 | continue; |
2905 | } | |
e3d6f909 | 2906 | spin_unlock_irqrestore(&cmd->t_task->t_state_lock, flags); |
c66ac9db | 2907 | |
e3d6f909 | 2908 | offset = cmd->se_tfo->set_fabric_sense_len(cmd, |
c66ac9db NB |
2909 | TRANSPORT_SENSE_BUFFER); |
2910 | ||
2911 | memcpy((void *)&buffer[offset], (void *)sense_buffer, | |
2912 | TRANSPORT_SENSE_BUFFER); | |
2913 | cmd->scsi_status = task->task_scsi_status; | |
2914 | /* Automatically padded */ | |
2915 | cmd->scsi_sense_length = | |
2916 | (TRANSPORT_SENSE_BUFFER + offset); | |
2917 | ||
2918 | printk(KERN_INFO "HBA_[%u]_PLUG[%s]: Set SAM STATUS: 0x%02x" | |
2919 | " and sense\n", | |
e3d6f909 | 2920 | dev->se_hba->hba_id, dev->transport->name, |
c66ac9db NB |
2921 | cmd->scsi_status); |
2922 | return 0; | |
2923 | } | |
e3d6f909 | 2924 | spin_unlock_irqrestore(&cmd->t_task->t_state_lock, flags); |
c66ac9db NB |
2925 | |
2926 | return -1; | |
2927 | } | |
2928 | ||
2929 | static int transport_allocate_resources(struct se_cmd *cmd) | |
2930 | { | |
2931 | u32 length = cmd->data_length; | |
2932 | ||
2933 | if ((cmd->se_cmd_flags & SCF_SCSI_DATA_SG_IO_CDB) || | |
2934 | (cmd->se_cmd_flags & SCF_SCSI_CONTROL_SG_IO_CDB)) | |
2935 | return transport_generic_get_mem(cmd, length, PAGE_SIZE); | |
2936 | else if (cmd->se_cmd_flags & SCF_SCSI_CONTROL_NONSG_IO_CDB) | |
2937 | return transport_generic_allocate_buf(cmd, length); | |
2938 | else | |
2939 | return 0; | |
2940 | } | |
2941 | ||
2942 | static int | |
2943 | transport_handle_reservation_conflict(struct se_cmd *cmd) | |
2944 | { | |
2945 | cmd->transport_wait_for_tasks = &transport_nop_wait_for_tasks; | |
2946 | cmd->se_cmd_flags |= SCF_SCSI_CDB_EXCEPTION; | |
2947 | cmd->se_cmd_flags |= SCF_SCSI_RESERVATION_CONFLICT; | |
2948 | cmd->scsi_status = SAM_STAT_RESERVATION_CONFLICT; | |
2949 | /* | |
2950 | * For UA Interlock Code 11b, a RESERVATION CONFLICT will | |
2951 | * establish a UNIT ATTENTION with PREVIOUS RESERVATION | |
2952 | * CONFLICT STATUS. | |
2953 | * | |
2954 | * See spc4r17, section 7.4.6 Control Mode Page, Table 349 | |
2955 | */ | |
e3d6f909 AG |
2956 | if (cmd->se_sess && |
2957 | cmd->se_dev->se_sub_dev->se_dev_attrib.emulate_ua_intlck_ctrl == 2) | |
2958 | core_scsi3_ua_allocate(cmd->se_sess->se_node_acl, | |
c66ac9db NB |
2959 | cmd->orig_fe_lun, 0x2C, |
2960 | ASCQ_2CH_PREVIOUS_RESERVATION_CONFLICT_STATUS); | |
2961 | return -2; | |
2962 | } | |
2963 | ||
2964 | /* transport_generic_cmd_sequencer(): | |
2965 | * | |
2966 | * Generic Command Sequencer that should work for most DAS transport | |
2967 | * drivers. | |
2968 | * | |
2969 | * Called from transport_generic_allocate_tasks() in the $FABRIC_MOD | |
2970 | * RX Thread. | |
2971 | * | |
2972 | * FIXME: Need to support other SCSI OPCODES where as well. | |
2973 | */ | |
2974 | static int transport_generic_cmd_sequencer( | |
2975 | struct se_cmd *cmd, | |
2976 | unsigned char *cdb) | |
2977 | { | |
e3d6f909 | 2978 | struct se_device *dev = cmd->se_lun->lun_se_dev; |
c66ac9db NB |
2979 | struct se_subsystem_dev *su_dev = dev->se_sub_dev; |
2980 | int ret = 0, sector_ret = 0, passthrough; | |
2981 | u32 sectors = 0, size = 0, pr_reg_type = 0; | |
2982 | u16 service_action; | |
2983 | u8 alua_ascq = 0; | |
2984 | /* | |
2985 | * Check for an existing UNIT ATTENTION condition | |
2986 | */ | |
2987 | if (core_scsi3_ua_check(cmd, cdb) < 0) { | |
2988 | cmd->transport_wait_for_tasks = | |
2989 | &transport_nop_wait_for_tasks; | |
2990 | cmd->se_cmd_flags |= SCF_SCSI_CDB_EXCEPTION; | |
2991 | cmd->scsi_sense_reason = TCM_CHECK_CONDITION_UNIT_ATTENTION; | |
2992 | return -2; | |
2993 | } | |
2994 | /* | |
2995 | * Check status of Asymmetric Logical Unit Assignment port | |
2996 | */ | |
e3d6f909 | 2997 | ret = su_dev->t10_alua.alua_state_check(cmd, cdb, &alua_ascq); |
c66ac9db NB |
2998 | if (ret != 0) { |
2999 | cmd->transport_wait_for_tasks = &transport_nop_wait_for_tasks; | |
3000 | /* | |
25985edc | 3001 | * Set SCSI additional sense code (ASC) to 'LUN Not Accessible'; |
c66ac9db NB |
3002 | * The ALUA additional sense code qualifier (ASCQ) is determined |
3003 | * by the ALUA primary or secondary access state.. | |
3004 | */ | |
3005 | if (ret > 0) { | |
3006 | #if 0 | |
3007 | printk(KERN_INFO "[%s]: ALUA TG Port not available," | |
3008 | " SenseKey: NOT_READY, ASC/ASCQ: 0x04/0x%02x\n", | |
e3d6f909 | 3009 | cmd->se_tfo->get_fabric_name(), alua_ascq); |
c66ac9db NB |
3010 | #endif |
3011 | transport_set_sense_codes(cmd, 0x04, alua_ascq); | |
3012 | cmd->se_cmd_flags |= SCF_SCSI_CDB_EXCEPTION; | |
3013 | cmd->scsi_sense_reason = TCM_CHECK_CONDITION_NOT_READY; | |
3014 | return -2; | |
3015 | } | |
3016 | goto out_invalid_cdb_field; | |
3017 | } | |
3018 | /* | |
3019 | * Check status for SPC-3 Persistent Reservations | |
3020 | */ | |
e3d6f909 AG |
3021 | if (su_dev->t10_pr.pr_ops.t10_reservation_check(cmd, &pr_reg_type) != 0) { |
3022 | if (su_dev->t10_pr.pr_ops.t10_seq_non_holder( | |
c66ac9db NB |
3023 | cmd, cdb, pr_reg_type) != 0) |
3024 | return transport_handle_reservation_conflict(cmd); | |
3025 | /* | |
3026 | * This means the CDB is allowed for the SCSI Initiator port | |
3027 | * when said port is *NOT* holding the legacy SPC-2 or | |
3028 | * SPC-3 Persistent Reservation. | |
3029 | */ | |
3030 | } | |
3031 | ||
3032 | switch (cdb[0]) { | |
3033 | case READ_6: | |
3034 | sectors = transport_get_sectors_6(cdb, cmd, §or_ret); | |
3035 | if (sector_ret) | |
3036 | goto out_unsupported_cdb; | |
3037 | size = transport_get_size(sectors, cdb, cmd); | |
3038 | cmd->transport_split_cdb = &split_cdb_XX_6; | |
e3d6f909 | 3039 | cmd->t_task->t_task_lba = transport_lba_21(cdb); |
c66ac9db NB |
3040 | cmd->se_cmd_flags |= SCF_SCSI_DATA_SG_IO_CDB; |
3041 | break; | |
3042 | case READ_10: | |
3043 | sectors = transport_get_sectors_10(cdb, cmd, §or_ret); | |
3044 | if (sector_ret) | |
3045 | goto out_unsupported_cdb; | |
3046 | size = transport_get_size(sectors, cdb, cmd); | |
3047 | cmd->transport_split_cdb = &split_cdb_XX_10; | |
e3d6f909 | 3048 | cmd->t_task->t_task_lba = transport_lba_32(cdb); |
c66ac9db NB |
3049 | cmd->se_cmd_flags |= SCF_SCSI_DATA_SG_IO_CDB; |
3050 | break; | |
3051 | case READ_12: | |
3052 | sectors = transport_get_sectors_12(cdb, cmd, §or_ret); | |
3053 | if (sector_ret) | |
3054 | goto out_unsupported_cdb; | |
3055 | size = transport_get_size(sectors, cdb, cmd); | |
3056 | cmd->transport_split_cdb = &split_cdb_XX_12; | |
e3d6f909 | 3057 | cmd->t_task->t_task_lba = transport_lba_32(cdb); |
c66ac9db NB |
3058 | cmd->se_cmd_flags |= SCF_SCSI_DATA_SG_IO_CDB; |
3059 | break; | |
3060 | case READ_16: | |
3061 | sectors = transport_get_sectors_16(cdb, cmd, §or_ret); | |
3062 | if (sector_ret) | |
3063 | goto out_unsupported_cdb; | |
3064 | size = transport_get_size(sectors, cdb, cmd); | |
3065 | cmd->transport_split_cdb = &split_cdb_XX_16; | |
e3d6f909 | 3066 | cmd->t_task->t_task_lba = transport_lba_64(cdb); |
c66ac9db NB |
3067 | cmd->se_cmd_flags |= SCF_SCSI_DATA_SG_IO_CDB; |
3068 | break; | |
3069 | case WRITE_6: | |
3070 | sectors = transport_get_sectors_6(cdb, cmd, §or_ret); | |
3071 | if (sector_ret) | |
3072 | goto out_unsupported_cdb; | |
3073 | size = transport_get_size(sectors, cdb, cmd); | |
3074 | cmd->transport_split_cdb = &split_cdb_XX_6; | |
e3d6f909 | 3075 | cmd->t_task->t_task_lba = transport_lba_21(cdb); |
c66ac9db NB |
3076 | cmd->se_cmd_flags |= SCF_SCSI_DATA_SG_IO_CDB; |
3077 | break; | |
3078 | case WRITE_10: | |
3079 | sectors = transport_get_sectors_10(cdb, cmd, §or_ret); | |
3080 | if (sector_ret) | |
3081 | goto out_unsupported_cdb; | |
3082 | size = transport_get_size(sectors, cdb, cmd); | |
3083 | cmd->transport_split_cdb = &split_cdb_XX_10; | |
e3d6f909 AG |
3084 | cmd->t_task->t_task_lba = transport_lba_32(cdb); |
3085 | cmd->t_task->t_tasks_fua = (cdb[1] & 0x8); | |
c66ac9db NB |
3086 | cmd->se_cmd_flags |= SCF_SCSI_DATA_SG_IO_CDB; |
3087 | break; | |
3088 | case WRITE_12: | |
3089 | sectors = transport_get_sectors_12(cdb, cmd, §or_ret); | |
3090 | if (sector_ret) | |
3091 | goto out_unsupported_cdb; | |
3092 | size = transport_get_size(sectors, cdb, cmd); | |
3093 | cmd->transport_split_cdb = &split_cdb_XX_12; | |
e3d6f909 AG |
3094 | cmd->t_task->t_task_lba = transport_lba_32(cdb); |
3095 | cmd->t_task->t_tasks_fua = (cdb[1] & 0x8); | |
c66ac9db NB |
3096 | cmd->se_cmd_flags |= SCF_SCSI_DATA_SG_IO_CDB; |
3097 | break; | |
3098 | case WRITE_16: | |
3099 | sectors = transport_get_sectors_16(cdb, cmd, §or_ret); | |
3100 | if (sector_ret) | |
3101 | goto out_unsupported_cdb; | |
3102 | size = transport_get_size(sectors, cdb, cmd); | |
3103 | cmd->transport_split_cdb = &split_cdb_XX_16; | |
e3d6f909 AG |
3104 | cmd->t_task->t_task_lba = transport_lba_64(cdb); |
3105 | cmd->t_task->t_tasks_fua = (cdb[1] & 0x8); | |
c66ac9db NB |
3106 | cmd->se_cmd_flags |= SCF_SCSI_DATA_SG_IO_CDB; |
3107 | break; | |
3108 | case XDWRITEREAD_10: | |
3109 | if ((cmd->data_direction != DMA_TO_DEVICE) || | |
e3d6f909 | 3110 | !(cmd->t_task->t_tasks_bidi)) |
c66ac9db NB |
3111 | goto out_invalid_cdb_field; |
3112 | sectors = transport_get_sectors_10(cdb, cmd, §or_ret); | |
3113 | if (sector_ret) | |
3114 | goto out_unsupported_cdb; | |
3115 | size = transport_get_size(sectors, cdb, cmd); | |
3116 | cmd->transport_split_cdb = &split_cdb_XX_10; | |
e3d6f909 | 3117 | cmd->t_task->t_task_lba = transport_lba_32(cdb); |
c66ac9db | 3118 | cmd->se_cmd_flags |= SCF_SCSI_DATA_SG_IO_CDB; |
e3d6f909 | 3119 | passthrough = (dev->transport->transport_type == |
c66ac9db NB |
3120 | TRANSPORT_PLUGIN_PHBA_PDEV); |
3121 | /* | |
3122 | * Skip the remaining assignments for TCM/PSCSI passthrough | |
3123 | */ | |
3124 | if (passthrough) | |
3125 | break; | |
3126 | /* | |
3127 | * Setup BIDI XOR callback to be run during transport_generic_complete_ok() | |
3128 | */ | |
3129 | cmd->transport_complete_callback = &transport_xor_callback; | |
e3d6f909 | 3130 | cmd->t_task->t_tasks_fua = (cdb[1] & 0x8); |
c66ac9db NB |
3131 | break; |
3132 | case VARIABLE_LENGTH_CMD: | |
3133 | service_action = get_unaligned_be16(&cdb[8]); | |
3134 | /* | |
3135 | * Determine if this is TCM/PSCSI device and we should disable | |
3136 | * internal emulation for this CDB. | |
3137 | */ | |
e3d6f909 | 3138 | passthrough = (dev->transport->transport_type == |
c66ac9db NB |
3139 | TRANSPORT_PLUGIN_PHBA_PDEV); |
3140 | ||
3141 | switch (service_action) { | |
3142 | case XDWRITEREAD_32: | |
3143 | sectors = transport_get_sectors_32(cdb, cmd, §or_ret); | |
3144 | if (sector_ret) | |
3145 | goto out_unsupported_cdb; | |
3146 | size = transport_get_size(sectors, cdb, cmd); | |
3147 | /* | |
3148 | * Use WRITE_32 and READ_32 opcodes for the emulated | |
3149 | * XDWRITE_READ_32 logic. | |
3150 | */ | |
3151 | cmd->transport_split_cdb = &split_cdb_XX_32; | |
e3d6f909 | 3152 | cmd->t_task->t_task_lba = transport_lba_64_ext(cdb); |
c66ac9db NB |
3153 | cmd->se_cmd_flags |= SCF_SCSI_DATA_SG_IO_CDB; |
3154 | ||
3155 | /* | |
3156 | * Skip the remaining assignments for TCM/PSCSI passthrough | |
3157 | */ | |
3158 | if (passthrough) | |
3159 | break; | |
3160 | ||
3161 | /* | |
3162 | * Setup BIDI XOR callback to be run during | |
3163 | * transport_generic_complete_ok() | |
3164 | */ | |
3165 | cmd->transport_complete_callback = &transport_xor_callback; | |
e3d6f909 | 3166 | cmd->t_task->t_tasks_fua = (cdb[10] & 0x8); |
c66ac9db NB |
3167 | break; |
3168 | case WRITE_SAME_32: | |
3169 | sectors = transport_get_sectors_32(cdb, cmd, §or_ret); | |
3170 | if (sector_ret) | |
3171 | goto out_unsupported_cdb; | |
3172 | size = transport_get_size(sectors, cdb, cmd); | |
e3d6f909 | 3173 | cmd->t_task->t_task_lba = get_unaligned_be64(&cdb[12]); |
c66ac9db NB |
3174 | cmd->se_cmd_flags |= SCF_SCSI_CONTROL_SG_IO_CDB; |
3175 | ||
3176 | /* | |
3177 | * Skip the remaining assignments for TCM/PSCSI passthrough | |
3178 | */ | |
3179 | if (passthrough) | |
3180 | break; | |
3181 | ||
3182 | if ((cdb[10] & 0x04) || (cdb[10] & 0x02)) { | |
3183 | printk(KERN_ERR "WRITE_SAME PBDATA and LBDATA" | |
3184 | " bits not supported for Block Discard" | |
3185 | " Emulation\n"); | |
3186 | goto out_invalid_cdb_field; | |
3187 | } | |
3188 | /* | |
3189 | * Currently for the emulated case we only accept | |
3190 | * tpws with the UNMAP=1 bit set. | |
3191 | */ | |
3192 | if (!(cdb[10] & 0x08)) { | |
3193 | printk(KERN_ERR "WRITE_SAME w/o UNMAP bit not" | |
3194 | " supported for Block Discard Emulation\n"); | |
3195 | goto out_invalid_cdb_field; | |
3196 | } | |
3197 | break; | |
3198 | default: | |
3199 | printk(KERN_ERR "VARIABLE_LENGTH_CMD service action" | |
3200 | " 0x%04x not supported\n", service_action); | |
3201 | goto out_unsupported_cdb; | |
3202 | } | |
3203 | break; | |
e434f1f1 | 3204 | case MAINTENANCE_IN: |
e3d6f909 | 3205 | if (dev->transport->get_device_type(dev) != TYPE_ROM) { |
c66ac9db NB |
3206 | /* MAINTENANCE_IN from SCC-2 */ |
3207 | /* | |
3208 | * Check for emulated MI_REPORT_TARGET_PGS. | |
3209 | */ | |
3210 | if (cdb[1] == MI_REPORT_TARGET_PGS) { | |
3211 | cmd->transport_emulate_cdb = | |
e3d6f909 | 3212 | (su_dev->t10_alua.alua_type == |
c66ac9db | 3213 | SPC3_ALUA_EMULATED) ? |
e3d6f909 | 3214 | core_emulate_report_target_port_groups : |
c66ac9db NB |
3215 | NULL; |
3216 | } | |
3217 | size = (cdb[6] << 24) | (cdb[7] << 16) | | |
3218 | (cdb[8] << 8) | cdb[9]; | |
3219 | } else { | |
3220 | /* GPCMD_SEND_KEY from multi media commands */ | |
3221 | size = (cdb[8] << 8) + cdb[9]; | |
3222 | } | |
3223 | cmd->se_cmd_flags |= SCF_SCSI_CONTROL_NONSG_IO_CDB; | |
3224 | break; | |
3225 | case MODE_SELECT: | |
3226 | size = cdb[4]; | |
3227 | cmd->se_cmd_flags |= SCF_SCSI_CONTROL_SG_IO_CDB; | |
3228 | break; | |
3229 | case MODE_SELECT_10: | |
3230 | size = (cdb[7] << 8) + cdb[8]; | |
3231 | cmd->se_cmd_flags |= SCF_SCSI_CONTROL_SG_IO_CDB; | |
3232 | break; | |
3233 | case MODE_SENSE: | |
3234 | size = cdb[4]; | |
3235 | cmd->se_cmd_flags |= SCF_SCSI_CONTROL_NONSG_IO_CDB; | |
3236 | break; | |
3237 | case MODE_SENSE_10: | |
3238 | case GPCMD_READ_BUFFER_CAPACITY: | |
3239 | case GPCMD_SEND_OPC: | |
3240 | case LOG_SELECT: | |
3241 | case LOG_SENSE: | |
3242 | size = (cdb[7] << 8) + cdb[8]; | |
3243 | cmd->se_cmd_flags |= SCF_SCSI_CONTROL_NONSG_IO_CDB; | |
3244 | break; | |
3245 | case READ_BLOCK_LIMITS: | |
3246 | size = READ_BLOCK_LEN; | |
3247 | cmd->se_cmd_flags |= SCF_SCSI_CONTROL_NONSG_IO_CDB; | |
3248 | break; | |
3249 | case GPCMD_GET_CONFIGURATION: | |
3250 | case GPCMD_READ_FORMAT_CAPACITIES: | |
3251 | case GPCMD_READ_DISC_INFO: | |
3252 | case GPCMD_READ_TRACK_RZONE_INFO: | |
3253 | size = (cdb[7] << 8) + cdb[8]; | |
3254 | cmd->se_cmd_flags |= SCF_SCSI_CONTROL_SG_IO_CDB; | |
3255 | break; | |
3256 | case PERSISTENT_RESERVE_IN: | |
3257 | case PERSISTENT_RESERVE_OUT: | |
3258 | cmd->transport_emulate_cdb = | |
e3d6f909 | 3259 | (su_dev->t10_pr.res_type == |
c66ac9db | 3260 | SPC3_PERSISTENT_RESERVATIONS) ? |
e3d6f909 | 3261 | core_scsi3_emulate_pr : NULL; |
c66ac9db NB |
3262 | size = (cdb[7] << 8) + cdb[8]; |
3263 | cmd->se_cmd_flags |= SCF_SCSI_CONTROL_NONSG_IO_CDB; | |
3264 | break; | |
3265 | case GPCMD_MECHANISM_STATUS: | |
3266 | case GPCMD_READ_DVD_STRUCTURE: | |
3267 | size = (cdb[8] << 8) + cdb[9]; | |
3268 | cmd->se_cmd_flags |= SCF_SCSI_CONTROL_SG_IO_CDB; | |
3269 | break; | |
3270 | case READ_POSITION: | |
3271 | size = READ_POSITION_LEN; | |
3272 | cmd->se_cmd_flags |= SCF_SCSI_CONTROL_NONSG_IO_CDB; | |
3273 | break; | |
e434f1f1 | 3274 | case MAINTENANCE_OUT: |
e3d6f909 | 3275 | if (dev->transport->get_device_type(dev) != TYPE_ROM) { |
c66ac9db NB |
3276 | /* MAINTENANCE_OUT from SCC-2 |
3277 | * | |
3278 | * Check for emulated MO_SET_TARGET_PGS. | |
3279 | */ | |
3280 | if (cdb[1] == MO_SET_TARGET_PGS) { | |
3281 | cmd->transport_emulate_cdb = | |
e3d6f909 | 3282 | (su_dev->t10_alua.alua_type == |
c66ac9db | 3283 | SPC3_ALUA_EMULATED) ? |
e3d6f909 | 3284 | core_emulate_set_target_port_groups : |
c66ac9db NB |
3285 | NULL; |
3286 | } | |
3287 | ||
3288 | size = (cdb[6] << 24) | (cdb[7] << 16) | | |
3289 | (cdb[8] << 8) | cdb[9]; | |
3290 | } else { | |
3291 | /* GPCMD_REPORT_KEY from multi media commands */ | |
3292 | size = (cdb[8] << 8) + cdb[9]; | |
3293 | } | |
3294 | cmd->se_cmd_flags |= SCF_SCSI_CONTROL_NONSG_IO_CDB; | |
3295 | break; | |
3296 | case INQUIRY: | |
3297 | size = (cdb[3] << 8) + cdb[4]; | |
3298 | /* | |
3299 | * Do implict HEAD_OF_QUEUE processing for INQUIRY. | |
3300 | * See spc4r17 section 5.3 | |
3301 | */ | |
e3d6f909 | 3302 | if (cmd->se_lun->lun_se_dev->dev_task_attr_type == SAM_TASK_ATTR_EMULATED) |
e66ecd50 | 3303 | cmd->sam_task_attr = MSG_HEAD_TAG; |
c66ac9db NB |
3304 | cmd->se_cmd_flags |= SCF_SCSI_CONTROL_NONSG_IO_CDB; |
3305 | break; | |
3306 | case READ_BUFFER: | |
3307 | size = (cdb[6] << 16) + (cdb[7] << 8) + cdb[8]; | |
3308 | cmd->se_cmd_flags |= SCF_SCSI_CONTROL_NONSG_IO_CDB; | |
3309 | break; | |
3310 | case READ_CAPACITY: | |
3311 | size = READ_CAP_LEN; | |
3312 | cmd->se_cmd_flags |= SCF_SCSI_CONTROL_NONSG_IO_CDB; | |
3313 | break; | |
3314 | case READ_MEDIA_SERIAL_NUMBER: | |
3315 | case SECURITY_PROTOCOL_IN: | |
3316 | case SECURITY_PROTOCOL_OUT: | |
3317 | size = (cdb[6] << 24) | (cdb[7] << 16) | (cdb[8] << 8) | cdb[9]; | |
3318 | cmd->se_cmd_flags |= SCF_SCSI_CONTROL_NONSG_IO_CDB; | |
3319 | break; | |
3320 | case SERVICE_ACTION_IN: | |
3321 | case ACCESS_CONTROL_IN: | |
3322 | case ACCESS_CONTROL_OUT: | |
3323 | case EXTENDED_COPY: | |
3324 | case READ_ATTRIBUTE: | |
3325 | case RECEIVE_COPY_RESULTS: | |
3326 | case WRITE_ATTRIBUTE: | |
3327 | size = (cdb[10] << 24) | (cdb[11] << 16) | | |
3328 | (cdb[12] << 8) | cdb[13]; | |
3329 | cmd->se_cmd_flags |= SCF_SCSI_CONTROL_NONSG_IO_CDB; | |
3330 | break; | |
3331 | case RECEIVE_DIAGNOSTIC: | |
3332 | case SEND_DIAGNOSTIC: | |
3333 | size = (cdb[3] << 8) | cdb[4]; | |
3334 | cmd->se_cmd_flags |= SCF_SCSI_CONTROL_NONSG_IO_CDB; | |
3335 | break; | |
3336 | /* #warning FIXME: Figure out correct GPCMD_READ_CD blocksize. */ | |
3337 | #if 0 | |
3338 | case GPCMD_READ_CD: | |
3339 | sectors = (cdb[6] << 16) + (cdb[7] << 8) + cdb[8]; | |
3340 | size = (2336 * sectors); | |
3341 | cmd->se_cmd_flags |= SCF_SCSI_CONTROL_NONSG_IO_CDB; | |
3342 | break; | |
3343 | #endif | |
3344 | case READ_TOC: | |
3345 | size = cdb[8]; | |
3346 | cmd->se_cmd_flags |= SCF_SCSI_CONTROL_NONSG_IO_CDB; | |
3347 | break; | |
3348 | case REQUEST_SENSE: | |
3349 | size = cdb[4]; | |
3350 | cmd->se_cmd_flags |= SCF_SCSI_CONTROL_NONSG_IO_CDB; | |
3351 | break; | |
3352 | case READ_ELEMENT_STATUS: | |
3353 | size = 65536 * cdb[7] + 256 * cdb[8] + cdb[9]; | |
3354 | cmd->se_cmd_flags |= SCF_SCSI_CONTROL_NONSG_IO_CDB; | |
3355 | break; | |
3356 | case WRITE_BUFFER: | |
3357 | size = (cdb[6] << 16) + (cdb[7] << 8) + cdb[8]; | |
3358 | cmd->se_cmd_flags |= SCF_SCSI_CONTROL_NONSG_IO_CDB; | |
3359 | break; | |
3360 | case RESERVE: | |
3361 | case RESERVE_10: | |
3362 | /* | |
3363 | * The SPC-2 RESERVE does not contain a size in the SCSI CDB. | |
3364 | * Assume the passthrough or $FABRIC_MOD will tell us about it. | |
3365 | */ | |
3366 | if (cdb[0] == RESERVE_10) | |
3367 | size = (cdb[7] << 8) | cdb[8]; | |
3368 | else | |
3369 | size = cmd->data_length; | |
3370 | ||
3371 | /* | |
3372 | * Setup the legacy emulated handler for SPC-2 and | |
3373 | * >= SPC-3 compatible reservation handling (CRH=1) | |
3374 | * Otherwise, we assume the underlying SCSI logic is | |
3375 | * is running in SPC_PASSTHROUGH, and wants reservations | |
3376 | * emulation disabled. | |
3377 | */ | |
3378 | cmd->transport_emulate_cdb = | |
e3d6f909 | 3379 | (su_dev->t10_pr.res_type != |
c66ac9db | 3380 | SPC_PASSTHROUGH) ? |
e3d6f909 | 3381 | core_scsi2_emulate_crh : NULL; |
c66ac9db NB |
3382 | cmd->se_cmd_flags |= SCF_SCSI_NON_DATA_CDB; |
3383 | break; | |
3384 | case RELEASE: | |
3385 | case RELEASE_10: | |
3386 | /* | |
3387 | * The SPC-2 RELEASE does not contain a size in the SCSI CDB. | |
3388 | * Assume the passthrough or $FABRIC_MOD will tell us about it. | |
3389 | */ | |
3390 | if (cdb[0] == RELEASE_10) | |
3391 | size = (cdb[7] << 8) | cdb[8]; | |
3392 | else | |
3393 | size = cmd->data_length; | |
3394 | ||
3395 | cmd->transport_emulate_cdb = | |
e3d6f909 | 3396 | (su_dev->t10_pr.res_type != |
c66ac9db | 3397 | SPC_PASSTHROUGH) ? |
e3d6f909 | 3398 | core_scsi2_emulate_crh : NULL; |
c66ac9db NB |
3399 | cmd->se_cmd_flags |= SCF_SCSI_NON_DATA_CDB; |
3400 | break; | |
3401 | case SYNCHRONIZE_CACHE: | |
3402 | case 0x91: /* SYNCHRONIZE_CACHE_16: */ | |
3403 | /* | |
3404 | * Extract LBA and range to be flushed for emulated SYNCHRONIZE_CACHE | |
3405 | */ | |
3406 | if (cdb[0] == SYNCHRONIZE_CACHE) { | |
3407 | sectors = transport_get_sectors_10(cdb, cmd, §or_ret); | |
e3d6f909 | 3408 | cmd->t_task->t_task_lba = transport_lba_32(cdb); |
c66ac9db NB |
3409 | } else { |
3410 | sectors = transport_get_sectors_16(cdb, cmd, §or_ret); | |
e3d6f909 | 3411 | cmd->t_task->t_task_lba = transport_lba_64(cdb); |
c66ac9db NB |
3412 | } |
3413 | if (sector_ret) | |
3414 | goto out_unsupported_cdb; | |
3415 | ||
3416 | size = transport_get_size(sectors, cdb, cmd); | |
3417 | cmd->se_cmd_flags |= SCF_SCSI_NON_DATA_CDB; | |
3418 | ||
3419 | /* | |
3420 | * For TCM/pSCSI passthrough, skip cmd->transport_emulate_cdb() | |
3421 | */ | |
e3d6f909 | 3422 | if (dev->transport->transport_type == TRANSPORT_PLUGIN_PHBA_PDEV) |
c66ac9db NB |
3423 | break; |
3424 | /* | |
3425 | * Set SCF_EMULATE_CDB_ASYNC to ensure asynchronous operation | |
3426 | * for SYNCHRONIZE_CACHE* Immed=1 case in __transport_execute_tasks() | |
3427 | */ | |
3428 | cmd->se_cmd_flags |= SCF_EMULATE_CDB_ASYNC; | |
3429 | /* | |
3430 | * Check to ensure that LBA + Range does not exceed past end of | |
3431 | * device. | |
3432 | */ | |
3433 | if (transport_get_sectors(cmd) < 0) | |
3434 | goto out_invalid_cdb_field; | |
3435 | break; | |
3436 | case UNMAP: | |
3437 | size = get_unaligned_be16(&cdb[7]); | |
e3d6f909 | 3438 | passthrough = (dev->transport->transport_type == |
c66ac9db NB |
3439 | TRANSPORT_PLUGIN_PHBA_PDEV); |
3440 | /* | |
3441 | * Determine if the received UNMAP used to for direct passthrough | |
3442 | * into Linux/SCSI with struct request via TCM/pSCSI or we are | |
3443 | * signaling the use of internal transport_generic_unmap() emulation | |
3444 | * for UNMAP -> Linux/BLOCK disbard with TCM/IBLOCK and TCM/FILEIO | |
3445 | * subsystem plugin backstores. | |
3446 | */ | |
3447 | if (!(passthrough)) | |
3448 | cmd->se_cmd_flags |= SCF_EMULATE_SYNC_UNMAP; | |
3449 | ||
3450 | cmd->se_cmd_flags |= SCF_SCSI_CONTROL_NONSG_IO_CDB; | |
3451 | break; | |
3452 | case WRITE_SAME_16: | |
3453 | sectors = transport_get_sectors_16(cdb, cmd, §or_ret); | |
3454 | if (sector_ret) | |
3455 | goto out_unsupported_cdb; | |
3456 | size = transport_get_size(sectors, cdb, cmd); | |
e3d6f909 AG |
3457 | cmd->t_task->t_task_lba = get_unaligned_be16(&cdb[2]); |
3458 | passthrough = (dev->transport->transport_type == | |
c66ac9db NB |
3459 | TRANSPORT_PLUGIN_PHBA_PDEV); |
3460 | /* | |
3461 | * Determine if the received WRITE_SAME_16 is used to for direct | |
3462 | * passthrough into Linux/SCSI with struct request via TCM/pSCSI | |
3463 | * or we are signaling the use of internal WRITE_SAME + UNMAP=1 | |
3464 | * emulation for -> Linux/BLOCK disbard with TCM/IBLOCK and | |
3465 | * TCM/FILEIO subsystem plugin backstores. | |
3466 | */ | |
3467 | if (!(passthrough)) { | |
3468 | if ((cdb[1] & 0x04) || (cdb[1] & 0x02)) { | |
3469 | printk(KERN_ERR "WRITE_SAME PBDATA and LBDATA" | |
3470 | " bits not supported for Block Discard" | |
3471 | " Emulation\n"); | |
3472 | goto out_invalid_cdb_field; | |
3473 | } | |
3474 | /* | |
3475 | * Currently for the emulated case we only accept | |
3476 | * tpws with the UNMAP=1 bit set. | |
3477 | */ | |
3478 | if (!(cdb[1] & 0x08)) { | |
3479 | printk(KERN_ERR "WRITE_SAME w/o UNMAP bit not " | |
3480 | " supported for Block Discard Emulation\n"); | |
3481 | goto out_invalid_cdb_field; | |
3482 | } | |
3483 | } | |
3484 | cmd->se_cmd_flags |= SCF_SCSI_CONTROL_SG_IO_CDB; | |
3485 | break; | |
3486 | case ALLOW_MEDIUM_REMOVAL: | |
3487 | case GPCMD_CLOSE_TRACK: | |
3488 | case ERASE: | |
3489 | case INITIALIZE_ELEMENT_STATUS: | |
3490 | case GPCMD_LOAD_UNLOAD: | |
3491 | case REZERO_UNIT: | |
3492 | case SEEK_10: | |
3493 | case GPCMD_SET_SPEED: | |
3494 | case SPACE: | |
3495 | case START_STOP: | |
3496 | case TEST_UNIT_READY: | |
3497 | case VERIFY: | |
3498 | case WRITE_FILEMARKS: | |
3499 | case MOVE_MEDIUM: | |
3500 | cmd->se_cmd_flags |= SCF_SCSI_NON_DATA_CDB; | |
3501 | break; | |
3502 | case REPORT_LUNS: | |
3503 | cmd->transport_emulate_cdb = | |
e3d6f909 | 3504 | transport_core_report_lun_response; |
c66ac9db NB |
3505 | size = (cdb[6] << 24) | (cdb[7] << 16) | (cdb[8] << 8) | cdb[9]; |
3506 | /* | |
3507 | * Do implict HEAD_OF_QUEUE processing for REPORT_LUNS | |
3508 | * See spc4r17 section 5.3 | |
3509 | */ | |
e3d6f909 | 3510 | if (cmd->se_lun->lun_se_dev->dev_task_attr_type == SAM_TASK_ATTR_EMULATED) |
e66ecd50 | 3511 | cmd->sam_task_attr = MSG_HEAD_TAG; |
c66ac9db NB |
3512 | cmd->se_cmd_flags |= SCF_SCSI_CONTROL_NONSG_IO_CDB; |
3513 | break; | |
3514 | default: | |
3515 | printk(KERN_WARNING "TARGET_CORE[%s]: Unsupported SCSI Opcode" | |
3516 | " 0x%02x, sending CHECK_CONDITION.\n", | |
e3d6f909 | 3517 | cmd->se_tfo->get_fabric_name(), cdb[0]); |
c66ac9db NB |
3518 | cmd->transport_wait_for_tasks = &transport_nop_wait_for_tasks; |
3519 | goto out_unsupported_cdb; | |
3520 | } | |
3521 | ||
3522 | if (size != cmd->data_length) { | |
3523 | printk(KERN_WARNING "TARGET_CORE[%s]: Expected Transfer Length:" | |
3524 | " %u does not match SCSI CDB Length: %u for SAM Opcode:" | |
e3d6f909 | 3525 | " 0x%02x\n", cmd->se_tfo->get_fabric_name(), |
c66ac9db NB |
3526 | cmd->data_length, size, cdb[0]); |
3527 | ||
3528 | cmd->cmd_spdtl = size; | |
3529 | ||
3530 | if (cmd->data_direction == DMA_TO_DEVICE) { | |
3531 | printk(KERN_ERR "Rejecting underflow/overflow" | |
3532 | " WRITE data\n"); | |
3533 | goto out_invalid_cdb_field; | |
3534 | } | |
3535 | /* | |
3536 | * Reject READ_* or WRITE_* with overflow/underflow for | |
3537 | * type SCF_SCSI_DATA_SG_IO_CDB. | |
3538 | */ | |
e3d6f909 | 3539 | if (!(ret) && (dev->se_sub_dev->se_dev_attrib.block_size != 512)) { |
c66ac9db NB |
3540 | printk(KERN_ERR "Failing OVERFLOW/UNDERFLOW for LBA op" |
3541 | " CDB on non 512-byte sector setup subsystem" | |
e3d6f909 | 3542 | " plugin: %s\n", dev->transport->name); |
c66ac9db NB |
3543 | /* Returns CHECK_CONDITION + INVALID_CDB_FIELD */ |
3544 | goto out_invalid_cdb_field; | |
3545 | } | |
3546 | ||
3547 | if (size > cmd->data_length) { | |
3548 | cmd->se_cmd_flags |= SCF_OVERFLOW_BIT; | |
3549 | cmd->residual_count = (size - cmd->data_length); | |
3550 | } else { | |
3551 | cmd->se_cmd_flags |= SCF_UNDERFLOW_BIT; | |
3552 | cmd->residual_count = (cmd->data_length - size); | |
3553 | } | |
3554 | cmd->data_length = size; | |
3555 | } | |
3556 | ||
3557 | transport_set_supported_SAM_opcode(cmd); | |
3558 | return ret; | |
3559 | ||
3560 | out_unsupported_cdb: | |
3561 | cmd->se_cmd_flags |= SCF_SCSI_CDB_EXCEPTION; | |
3562 | cmd->scsi_sense_reason = TCM_UNSUPPORTED_SCSI_OPCODE; | |
3563 | return -2; | |
3564 | out_invalid_cdb_field: | |
3565 | cmd->se_cmd_flags |= SCF_SCSI_CDB_EXCEPTION; | |
3566 | cmd->scsi_sense_reason = TCM_INVALID_CDB_FIELD; | |
3567 | return -2; | |
3568 | } | |
3569 | ||
3570 | static inline void transport_release_tasks(struct se_cmd *); | |
3571 | ||
3572 | /* | |
3573 | * This function will copy a contiguous *src buffer into a destination | |
3574 | * struct scatterlist array. | |
3575 | */ | |
3576 | static void transport_memcpy_write_contig( | |
3577 | struct se_cmd *cmd, | |
3578 | struct scatterlist *sg_d, | |
3579 | unsigned char *src) | |
3580 | { | |
3581 | u32 i = 0, length = 0, total_length = cmd->data_length; | |
3582 | void *dst; | |
3583 | ||
3584 | while (total_length) { | |
3585 | length = sg_d[i].length; | |
3586 | ||
3587 | if (length > total_length) | |
3588 | length = total_length; | |
3589 | ||
3590 | dst = sg_virt(&sg_d[i]); | |
3591 | ||
3592 | memcpy(dst, src, length); | |
3593 | ||
3594 | if (!(total_length -= length)) | |
3595 | return; | |
3596 | ||
3597 | src += length; | |
3598 | i++; | |
3599 | } | |
3600 | } | |
3601 | ||
3602 | /* | |
3603 | * This function will copy a struct scatterlist array *sg_s into a destination | |
3604 | * contiguous *dst buffer. | |
3605 | */ | |
3606 | static void transport_memcpy_read_contig( | |
3607 | struct se_cmd *cmd, | |
3608 | unsigned char *dst, | |
3609 | struct scatterlist *sg_s) | |
3610 | { | |
3611 | u32 i = 0, length = 0, total_length = cmd->data_length; | |
3612 | void *src; | |
3613 | ||
3614 | while (total_length) { | |
3615 | length = sg_s[i].length; | |
3616 | ||
3617 | if (length > total_length) | |
3618 | length = total_length; | |
3619 | ||
3620 | src = sg_virt(&sg_s[i]); | |
3621 | ||
3622 | memcpy(dst, src, length); | |
3623 | ||
3624 | if (!(total_length -= length)) | |
3625 | return; | |
3626 | ||
3627 | dst += length; | |
3628 | i++; | |
3629 | } | |
3630 | } | |
3631 | ||
3632 | static void transport_memcpy_se_mem_read_contig( | |
3633 | struct se_cmd *cmd, | |
3634 | unsigned char *dst, | |
3635 | struct list_head *se_mem_list) | |
3636 | { | |
3637 | struct se_mem *se_mem; | |
3638 | void *src; | |
3639 | u32 length = 0, total_length = cmd->data_length; | |
3640 | ||
3641 | list_for_each_entry(se_mem, se_mem_list, se_list) { | |
3642 | length = se_mem->se_len; | |
3643 | ||
3644 | if (length > total_length) | |
3645 | length = total_length; | |
3646 | ||
3647 | src = page_address(se_mem->se_page) + se_mem->se_off; | |
3648 | ||
3649 | memcpy(dst, src, length); | |
3650 | ||
3651 | if (!(total_length -= length)) | |
3652 | return; | |
3653 | ||
3654 | dst += length; | |
3655 | } | |
3656 | } | |
3657 | ||
3658 | /* | |
3659 | * Called from transport_generic_complete_ok() and | |
3660 | * transport_generic_request_failure() to determine which dormant/delayed | |
3661 | * and ordered cmds need to have their tasks added to the execution queue. | |
3662 | */ | |
3663 | static void transport_complete_task_attr(struct se_cmd *cmd) | |
3664 | { | |
e3d6f909 | 3665 | struct se_device *dev = cmd->se_lun->lun_se_dev; |
c66ac9db NB |
3666 | struct se_cmd *cmd_p, *cmd_tmp; |
3667 | int new_active_tasks = 0; | |
3668 | ||
e66ecd50 | 3669 | if (cmd->sam_task_attr == MSG_SIMPLE_TAG) { |
c66ac9db NB |
3670 | atomic_dec(&dev->simple_cmds); |
3671 | smp_mb__after_atomic_dec(); | |
3672 | dev->dev_cur_ordered_id++; | |
3673 | DEBUG_STA("Incremented dev->dev_cur_ordered_id: %u for" | |
3674 | " SIMPLE: %u\n", dev->dev_cur_ordered_id, | |
3675 | cmd->se_ordered_id); | |
e66ecd50 | 3676 | } else if (cmd->sam_task_attr == MSG_HEAD_TAG) { |
c66ac9db NB |
3677 | atomic_dec(&dev->dev_hoq_count); |
3678 | smp_mb__after_atomic_dec(); | |
3679 | dev->dev_cur_ordered_id++; | |
3680 | DEBUG_STA("Incremented dev_cur_ordered_id: %u for" | |
3681 | " HEAD_OF_QUEUE: %u\n", dev->dev_cur_ordered_id, | |
3682 | cmd->se_ordered_id); | |
e66ecd50 | 3683 | } else if (cmd->sam_task_attr == MSG_ORDERED_TAG) { |
c66ac9db NB |
3684 | spin_lock(&dev->ordered_cmd_lock); |
3685 | list_del(&cmd->se_ordered_list); | |
3686 | atomic_dec(&dev->dev_ordered_sync); | |
3687 | smp_mb__after_atomic_dec(); | |
3688 | spin_unlock(&dev->ordered_cmd_lock); | |
3689 | ||
3690 | dev->dev_cur_ordered_id++; | |
3691 | DEBUG_STA("Incremented dev_cur_ordered_id: %u for ORDERED:" | |
3692 | " %u\n", dev->dev_cur_ordered_id, cmd->se_ordered_id); | |
3693 | } | |
3694 | /* | |
3695 | * Process all commands up to the last received | |
3696 | * ORDERED task attribute which requires another blocking | |
3697 | * boundary | |
3698 | */ | |
3699 | spin_lock(&dev->delayed_cmd_lock); | |
3700 | list_for_each_entry_safe(cmd_p, cmd_tmp, | |
3701 | &dev->delayed_cmd_list, se_delayed_list) { | |
3702 | ||
3703 | list_del(&cmd_p->se_delayed_list); | |
3704 | spin_unlock(&dev->delayed_cmd_lock); | |
3705 | ||
3706 | DEBUG_STA("Calling add_tasks() for" | |
3707 | " cmd_p: 0x%02x Task Attr: 0x%02x" | |
3708 | " Dormant -> Active, se_ordered_id: %u\n", | |
3709 | T_TASK(cmd_p)->t_task_cdb[0], | |
3710 | cmd_p->sam_task_attr, cmd_p->se_ordered_id); | |
3711 | ||
3712 | transport_add_tasks_from_cmd(cmd_p); | |
3713 | new_active_tasks++; | |
3714 | ||
3715 | spin_lock(&dev->delayed_cmd_lock); | |
e66ecd50 | 3716 | if (cmd_p->sam_task_attr == MSG_ORDERED_TAG) |
c66ac9db NB |
3717 | break; |
3718 | } | |
3719 | spin_unlock(&dev->delayed_cmd_lock); | |
3720 | /* | |
3721 | * If new tasks have become active, wake up the transport thread | |
3722 | * to do the processing of the Active tasks. | |
3723 | */ | |
3724 | if (new_active_tasks != 0) | |
e3d6f909 | 3725 | wake_up_interruptible(&dev->dev_queue_obj.thread_wq); |
c66ac9db NB |
3726 | } |
3727 | ||
3728 | static void transport_generic_complete_ok(struct se_cmd *cmd) | |
3729 | { | |
3730 | int reason = 0; | |
3731 | /* | |
3732 | * Check if we need to move delayed/dormant tasks from cmds on the | |
3733 | * delayed execution list after a HEAD_OF_QUEUE or ORDERED Task | |
3734 | * Attribute. | |
3735 | */ | |
e3d6f909 | 3736 | if (cmd->se_lun->lun_se_dev->dev_task_attr_type == SAM_TASK_ATTR_EMULATED) |
c66ac9db NB |
3737 | transport_complete_task_attr(cmd); |
3738 | /* | |
3739 | * Check if we need to retrieve a sense buffer from | |
3740 | * the struct se_cmd in question. | |
3741 | */ | |
3742 | if (cmd->se_cmd_flags & SCF_TRANSPORT_TASK_SENSE) { | |
3743 | if (transport_get_sense_data(cmd) < 0) | |
3744 | reason = TCM_NON_EXISTENT_LUN; | |
3745 | ||
3746 | /* | |
3747 | * Only set when an struct se_task->task_scsi_status returned | |
3748 | * a non GOOD status. | |
3749 | */ | |
3750 | if (cmd->scsi_status) { | |
3751 | transport_send_check_condition_and_sense( | |
3752 | cmd, reason, 1); | |
3753 | transport_lun_remove_cmd(cmd); | |
3754 | transport_cmd_check_stop_to_fabric(cmd); | |
3755 | return; | |
3756 | } | |
3757 | } | |
3758 | /* | |
25985edc | 3759 | * Check for a callback, used by amongst other things |
c66ac9db NB |
3760 | * XDWRITE_READ_10 emulation. |
3761 | */ | |
3762 | if (cmd->transport_complete_callback) | |
3763 | cmd->transport_complete_callback(cmd); | |
3764 | ||
3765 | switch (cmd->data_direction) { | |
3766 | case DMA_FROM_DEVICE: | |
3767 | spin_lock(&cmd->se_lun->lun_sep_lock); | |
e3d6f909 AG |
3768 | if (cmd->se_lun->lun_sep) { |
3769 | cmd->se_lun->lun_sep->sep_stats.tx_data_octets += | |
c66ac9db NB |
3770 | cmd->data_length; |
3771 | } | |
3772 | spin_unlock(&cmd->se_lun->lun_sep_lock); | |
3773 | /* | |
3774 | * If enabled by TCM fabirc module pre-registered SGL | |
3775 | * memory, perform the memcpy() from the TCM internal | |
3776 | * contigious buffer back to the original SGL. | |
3777 | */ | |
3778 | if (cmd->se_cmd_flags & SCF_PASSTHROUGH_CONTIG_TO_SG) | |
3779 | transport_memcpy_write_contig(cmd, | |
e3d6f909 AG |
3780 | cmd->t_task->t_task_pt_sgl, |
3781 | cmd->t_task->t_task_buf); | |
c66ac9db | 3782 | |
e3d6f909 | 3783 | cmd->se_tfo->queue_data_in(cmd); |
c66ac9db NB |
3784 | break; |
3785 | case DMA_TO_DEVICE: | |
3786 | spin_lock(&cmd->se_lun->lun_sep_lock); | |
e3d6f909 AG |
3787 | if (cmd->se_lun->lun_sep) { |
3788 | cmd->se_lun->lun_sep->sep_stats.rx_data_octets += | |
c66ac9db NB |
3789 | cmd->data_length; |
3790 | } | |
3791 | spin_unlock(&cmd->se_lun->lun_sep_lock); | |
3792 | /* | |
3793 | * Check if we need to send READ payload for BIDI-COMMAND | |
3794 | */ | |
e3d6f909 | 3795 | if (cmd->t_task->t_mem_bidi_list != NULL) { |
c66ac9db | 3796 | spin_lock(&cmd->se_lun->lun_sep_lock); |
e3d6f909 AG |
3797 | if (cmd->se_lun->lun_sep) { |
3798 | cmd->se_lun->lun_sep->sep_stats.tx_data_octets += | |
c66ac9db NB |
3799 | cmd->data_length; |
3800 | } | |
3801 | spin_unlock(&cmd->se_lun->lun_sep_lock); | |
e3d6f909 | 3802 | cmd->se_tfo->queue_data_in(cmd); |
c66ac9db NB |
3803 | break; |
3804 | } | |
3805 | /* Fall through for DMA_TO_DEVICE */ | |
3806 | case DMA_NONE: | |
e3d6f909 | 3807 | cmd->se_tfo->queue_status(cmd); |
c66ac9db NB |
3808 | break; |
3809 | default: | |
3810 | break; | |
3811 | } | |
3812 | ||
3813 | transport_lun_remove_cmd(cmd); | |
3814 | transport_cmd_check_stop_to_fabric(cmd); | |
3815 | } | |
3816 | ||
3817 | static void transport_free_dev_tasks(struct se_cmd *cmd) | |
3818 | { | |
3819 | struct se_task *task, *task_tmp; | |
3820 | unsigned long flags; | |
3821 | ||
e3d6f909 | 3822 | spin_lock_irqsave(&cmd->t_task->t_state_lock, flags); |
c66ac9db | 3823 | list_for_each_entry_safe(task, task_tmp, |
e3d6f909 | 3824 | &cmd->t_task->t_task_list, t_list) { |
c66ac9db NB |
3825 | if (atomic_read(&task->task_active)) |
3826 | continue; | |
3827 | ||
3828 | kfree(task->task_sg_bidi); | |
3829 | kfree(task->task_sg); | |
3830 | ||
3831 | list_del(&task->t_list); | |
3832 | ||
e3d6f909 | 3833 | spin_unlock_irqrestore(&cmd->t_task->t_state_lock, flags); |
c66ac9db | 3834 | if (task->se_dev) |
e3d6f909 | 3835 | task->se_dev->transport->free_task(task); |
c66ac9db NB |
3836 | else |
3837 | printk(KERN_ERR "task[%u] - task->se_dev is NULL\n", | |
3838 | task->task_no); | |
e3d6f909 | 3839 | spin_lock_irqsave(&cmd->t_task->t_state_lock, flags); |
c66ac9db | 3840 | } |
e3d6f909 | 3841 | spin_unlock_irqrestore(&cmd->t_task->t_state_lock, flags); |
c66ac9db NB |
3842 | } |
3843 | ||
3844 | static inline void transport_free_pages(struct se_cmd *cmd) | |
3845 | { | |
3846 | struct se_mem *se_mem, *se_mem_tmp; | |
3847 | int free_page = 1; | |
3848 | ||
3849 | if (cmd->se_cmd_flags & SCF_PASSTHROUGH_SG_TO_MEM_NOALLOC) | |
3850 | free_page = 0; | |
3851 | if (cmd->se_dev->transport->do_se_mem_map) | |
3852 | free_page = 0; | |
3853 | ||
e3d6f909 AG |
3854 | if (cmd->t_task->t_task_buf) { |
3855 | kfree(cmd->t_task->t_task_buf); | |
3856 | cmd->t_task->t_task_buf = NULL; | |
c66ac9db NB |
3857 | return; |
3858 | } | |
3859 | ||
3860 | /* | |
3861 | * Caller will handle releasing of struct se_mem. | |
3862 | */ | |
3863 | if (cmd->se_cmd_flags & SCF_CMD_PASSTHROUGH_NOALLOC) | |
3864 | return; | |
3865 | ||
e3d6f909 | 3866 | if (!(cmd->t_task->t_tasks_se_num)) |
c66ac9db NB |
3867 | return; |
3868 | ||
3869 | list_for_each_entry_safe(se_mem, se_mem_tmp, | |
e3d6f909 | 3870 | cmd->t_task->t_mem_list, se_list) { |
c66ac9db NB |
3871 | /* |
3872 | * We only release call __free_page(struct se_mem->se_page) when | |
3873 | * SCF_PASSTHROUGH_SG_TO_MEM_NOALLOC is NOT in use, | |
3874 | */ | |
3875 | if (free_page) | |
3876 | __free_page(se_mem->se_page); | |
3877 | ||
3878 | list_del(&se_mem->se_list); | |
3879 | kmem_cache_free(se_mem_cache, se_mem); | |
3880 | } | |
3881 | ||
e3d6f909 | 3882 | if (cmd->t_task->t_mem_bidi_list && cmd->t_task->t_tasks_se_bidi_num) { |
c66ac9db | 3883 | list_for_each_entry_safe(se_mem, se_mem_tmp, |
e3d6f909 | 3884 | cmd->t_task->t_mem_bidi_list, se_list) { |
c66ac9db NB |
3885 | /* |
3886 | * We only release call __free_page(struct se_mem->se_page) when | |
3887 | * SCF_PASSTHROUGH_SG_TO_MEM_NOALLOC is NOT in use, | |
3888 | */ | |
3889 | if (free_page) | |
3890 | __free_page(se_mem->se_page); | |
3891 | ||
3892 | list_del(&se_mem->se_list); | |
3893 | kmem_cache_free(se_mem_cache, se_mem); | |
3894 | } | |
3895 | } | |
3896 | ||
e3d6f909 AG |
3897 | kfree(cmd->t_task->t_mem_bidi_list); |
3898 | cmd->t_task->t_mem_bidi_list = NULL; | |
3899 | kfree(cmd->t_task->t_mem_list); | |
3900 | cmd->t_task->t_mem_list = NULL; | |
3901 | cmd->t_task->t_tasks_se_num = 0; | |
c66ac9db NB |
3902 | } |
3903 | ||
3904 | static inline void transport_release_tasks(struct se_cmd *cmd) | |
3905 | { | |
3906 | transport_free_dev_tasks(cmd); | |
3907 | } | |
3908 | ||
3909 | static inline int transport_dec_and_check(struct se_cmd *cmd) | |
3910 | { | |
3911 | unsigned long flags; | |
3912 | ||
e3d6f909 AG |
3913 | spin_lock_irqsave(&cmd->t_task->t_state_lock, flags); |
3914 | if (atomic_read(&cmd->t_task->t_fe_count)) { | |
3915 | if (!(atomic_dec_and_test(&cmd->t_task->t_fe_count))) { | |
3916 | spin_unlock_irqrestore(&cmd->t_task->t_state_lock, | |
c66ac9db NB |
3917 | flags); |
3918 | return 1; | |
3919 | } | |
3920 | } | |
3921 | ||
e3d6f909 AG |
3922 | if (atomic_read(&cmd->t_task->t_se_count)) { |
3923 | if (!(atomic_dec_and_test(&cmd->t_task->t_se_count))) { | |
3924 | spin_unlock_irqrestore(&cmd->t_task->t_state_lock, | |
c66ac9db NB |
3925 | flags); |
3926 | return 1; | |
3927 | } | |
3928 | } | |
e3d6f909 | 3929 | spin_unlock_irqrestore(&cmd->t_task->t_state_lock, flags); |
c66ac9db NB |
3930 | |
3931 | return 0; | |
3932 | } | |
3933 | ||
3934 | static void transport_release_fe_cmd(struct se_cmd *cmd) | |
3935 | { | |
3936 | unsigned long flags; | |
3937 | ||
3938 | if (transport_dec_and_check(cmd)) | |
3939 | return; | |
3940 | ||
e3d6f909 AG |
3941 | spin_lock_irqsave(&cmd->t_task->t_state_lock, flags); |
3942 | if (!(atomic_read(&cmd->t_task->transport_dev_active))) { | |
3943 | spin_unlock_irqrestore(&cmd->t_task->t_state_lock, flags); | |
c66ac9db NB |
3944 | goto free_pages; |
3945 | } | |
e3d6f909 | 3946 | atomic_set(&cmd->t_task->transport_dev_active, 0); |
c66ac9db | 3947 | transport_all_task_dev_remove_state(cmd); |
e3d6f909 | 3948 | spin_unlock_irqrestore(&cmd->t_task->t_state_lock, flags); |
c66ac9db NB |
3949 | |
3950 | transport_release_tasks(cmd); | |
3951 | free_pages: | |
3952 | transport_free_pages(cmd); | |
3953 | transport_free_se_cmd(cmd); | |
e3d6f909 | 3954 | cmd->se_tfo->release_cmd_direct(cmd); |
c66ac9db NB |
3955 | } |
3956 | ||
3957 | static int transport_generic_remove( | |
3958 | struct se_cmd *cmd, | |
3959 | int release_to_pool, | |
3960 | int session_reinstatement) | |
3961 | { | |
3962 | unsigned long flags; | |
3963 | ||
e3d6f909 | 3964 | if (!(cmd->t_task)) |
c66ac9db NB |
3965 | goto release_cmd; |
3966 | ||
3967 | if (transport_dec_and_check(cmd)) { | |
3968 | if (session_reinstatement) { | |
e3d6f909 | 3969 | spin_lock_irqsave(&cmd->t_task->t_state_lock, flags); |
c66ac9db | 3970 | transport_all_task_dev_remove_state(cmd); |
e3d6f909 | 3971 | spin_unlock_irqrestore(&cmd->t_task->t_state_lock, |
c66ac9db NB |
3972 | flags); |
3973 | } | |
3974 | return 1; | |
3975 | } | |
3976 | ||
e3d6f909 AG |
3977 | spin_lock_irqsave(&cmd->t_task->t_state_lock, flags); |
3978 | if (!(atomic_read(&cmd->t_task->transport_dev_active))) { | |
3979 | spin_unlock_irqrestore(&cmd->t_task->t_state_lock, flags); | |
c66ac9db NB |
3980 | goto free_pages; |
3981 | } | |
e3d6f909 | 3982 | atomic_set(&cmd->t_task->transport_dev_active, 0); |
c66ac9db | 3983 | transport_all_task_dev_remove_state(cmd); |
e3d6f909 | 3984 | spin_unlock_irqrestore(&cmd->t_task->t_state_lock, flags); |
c66ac9db NB |
3985 | |
3986 | transport_release_tasks(cmd); | |
3987 | free_pages: | |
3988 | transport_free_pages(cmd); | |
3989 | ||
3990 | release_cmd: | |
3991 | if (release_to_pool) { | |
3992 | transport_release_cmd_to_pool(cmd); | |
3993 | } else { | |
3994 | transport_free_se_cmd(cmd); | |
e3d6f909 | 3995 | cmd->se_tfo->release_cmd_direct(cmd); |
c66ac9db NB |
3996 | } |
3997 | ||
3998 | return 0; | |
3999 | } | |
4000 | ||
4001 | /* | |
4002 | * transport_generic_map_mem_to_cmd - Perform SGL -> struct se_mem map | |
4003 | * @cmd: Associated se_cmd descriptor | |
4004 | * @mem: SGL style memory for TCM WRITE / READ | |
4005 | * @sg_mem_num: Number of SGL elements | |
4006 | * @mem_bidi_in: SGL style memory for TCM BIDI READ | |
4007 | * @sg_mem_bidi_num: Number of BIDI READ SGL elements | |
4008 | * | |
4009 | * Return: nonzero return cmd was rejected for -ENOMEM or inproper usage | |
4010 | * of parameters. | |
4011 | */ | |
4012 | int transport_generic_map_mem_to_cmd( | |
4013 | struct se_cmd *cmd, | |
4014 | struct scatterlist *mem, | |
4015 | u32 sg_mem_num, | |
4016 | struct scatterlist *mem_bidi_in, | |
4017 | u32 sg_mem_bidi_num) | |
4018 | { | |
4019 | u32 se_mem_cnt_out = 0; | |
4020 | int ret; | |
4021 | ||
4022 | if (!(mem) || !(sg_mem_num)) | |
4023 | return 0; | |
4024 | /* | |
4025 | * Passed *mem will contain a list_head containing preformatted | |
4026 | * struct se_mem elements... | |
4027 | */ | |
4028 | if (!(cmd->se_cmd_flags & SCF_PASSTHROUGH_SG_TO_MEM)) { | |
4029 | if ((mem_bidi_in) || (sg_mem_bidi_num)) { | |
4030 | printk(KERN_ERR "SCF_CMD_PASSTHROUGH_NOALLOC not supported" | |
4031 | " with BIDI-COMMAND\n"); | |
4032 | return -ENOSYS; | |
4033 | } | |
4034 | ||
e3d6f909 AG |
4035 | cmd->t_task->t_mem_list = (struct list_head *)mem; |
4036 | cmd->t_task->t_tasks_se_num = sg_mem_num; | |
c66ac9db NB |
4037 | cmd->se_cmd_flags |= SCF_CMD_PASSTHROUGH_NOALLOC; |
4038 | return 0; | |
4039 | } | |
4040 | /* | |
4041 | * Otherwise, assume the caller is passing a struct scatterlist | |
4042 | * array from include/linux/scatterlist.h | |
4043 | */ | |
4044 | if ((cmd->se_cmd_flags & SCF_SCSI_DATA_SG_IO_CDB) || | |
4045 | (cmd->se_cmd_flags & SCF_SCSI_CONTROL_SG_IO_CDB)) { | |
4046 | /* | |
4047 | * For CDB using TCM struct se_mem linked list scatterlist memory | |
4048 | * processed into a TCM struct se_subsystem_dev, we do the mapping | |
4049 | * from the passed physical memory to struct se_mem->se_page here. | |
4050 | */ | |
e3d6f909 AG |
4051 | cmd->t_task->t_mem_list = transport_init_se_mem_list(); |
4052 | if (!(cmd->t_task->t_mem_list)) | |
c66ac9db NB |
4053 | return -ENOMEM; |
4054 | ||
4055 | ret = transport_map_sg_to_mem(cmd, | |
e3d6f909 | 4056 | cmd->t_task->t_mem_list, mem, &se_mem_cnt_out); |
c66ac9db NB |
4057 | if (ret < 0) |
4058 | return -ENOMEM; | |
4059 | ||
e3d6f909 | 4060 | cmd->t_task->t_tasks_se_num = se_mem_cnt_out; |
c66ac9db NB |
4061 | /* |
4062 | * Setup BIDI READ list of struct se_mem elements | |
4063 | */ | |
4064 | if ((mem_bidi_in) && (sg_mem_bidi_num)) { | |
e3d6f909 AG |
4065 | cmd->t_task->t_mem_bidi_list = transport_init_se_mem_list(); |
4066 | if (!(cmd->t_task->t_mem_bidi_list)) { | |
4067 | kfree(cmd->t_task->t_mem_list); | |
c66ac9db NB |
4068 | return -ENOMEM; |
4069 | } | |
4070 | se_mem_cnt_out = 0; | |
4071 | ||
4072 | ret = transport_map_sg_to_mem(cmd, | |
e3d6f909 | 4073 | cmd->t_task->t_mem_bidi_list, mem_bidi_in, |
c66ac9db NB |
4074 | &se_mem_cnt_out); |
4075 | if (ret < 0) { | |
e3d6f909 | 4076 | kfree(cmd->t_task->t_mem_list); |
c66ac9db NB |
4077 | return -ENOMEM; |
4078 | } | |
4079 | ||
e3d6f909 | 4080 | cmd->t_task->t_tasks_se_bidi_num = se_mem_cnt_out; |
c66ac9db NB |
4081 | } |
4082 | cmd->se_cmd_flags |= SCF_PASSTHROUGH_SG_TO_MEM_NOALLOC; | |
4083 | ||
4084 | } else if (cmd->se_cmd_flags & SCF_SCSI_CONTROL_NONSG_IO_CDB) { | |
4085 | if (mem_bidi_in || sg_mem_bidi_num) { | |
4086 | printk(KERN_ERR "BIDI-Commands not supported using " | |
4087 | "SCF_SCSI_CONTROL_NONSG_IO_CDB\n"); | |
4088 | return -ENOSYS; | |
4089 | } | |
4090 | /* | |
4091 | * For incoming CDBs using a contiguous buffer internall with TCM, | |
4092 | * save the passed struct scatterlist memory. After TCM storage object | |
4093 | * processing has completed for this struct se_cmd, TCM core will call | |
4094 | * transport_memcpy_[write,read]_contig() as necessary from | |
4095 | * transport_generic_complete_ok() and transport_write_pending() in order | |
4096 | * to copy the TCM buffer to/from the original passed *mem in SGL -> | |
4097 | * struct scatterlist format. | |
4098 | */ | |
4099 | cmd->se_cmd_flags |= SCF_PASSTHROUGH_CONTIG_TO_SG; | |
e3d6f909 | 4100 | cmd->t_task->t_task_pt_sgl = mem; |
c66ac9db NB |
4101 | } |
4102 | ||
4103 | return 0; | |
4104 | } | |
4105 | EXPORT_SYMBOL(transport_generic_map_mem_to_cmd); | |
4106 | ||
4107 | ||
4108 | static inline long long transport_dev_end_lba(struct se_device *dev) | |
4109 | { | |
4110 | return dev->transport->get_blocks(dev) + 1; | |
4111 | } | |
4112 | ||
4113 | static int transport_get_sectors(struct se_cmd *cmd) | |
4114 | { | |
e3d6f909 | 4115 | struct se_device *dev = cmd->se_lun->lun_se_dev; |
c66ac9db | 4116 | |
e3d6f909 AG |
4117 | cmd->t_task->t_tasks_sectors = |
4118 | (cmd->data_length / dev->se_sub_dev->se_dev_attrib.block_size); | |
4119 | if (!(cmd->t_task->t_tasks_sectors)) | |
4120 | cmd->t_task->t_tasks_sectors = 1; | |
c66ac9db | 4121 | |
e3d6f909 | 4122 | if (dev->transport->get_device_type(dev) != TYPE_DISK) |
c66ac9db NB |
4123 | return 0; |
4124 | ||
e3d6f909 | 4125 | if ((cmd->t_task->t_task_lba + cmd->t_task->t_tasks_sectors) > |
c66ac9db NB |
4126 | transport_dev_end_lba(dev)) { |
4127 | printk(KERN_ERR "LBA: %llu Sectors: %u exceeds" | |
4128 | " transport_dev_end_lba(): %llu\n", | |
e3d6f909 | 4129 | cmd->t_task->t_task_lba, cmd->t_task->t_tasks_sectors, |
c66ac9db NB |
4130 | transport_dev_end_lba(dev)); |
4131 | cmd->se_cmd_flags |= SCF_SCSI_CDB_EXCEPTION; | |
4132 | cmd->scsi_sense_reason = TCM_SECTOR_COUNT_TOO_MANY; | |
4133 | return PYX_TRANSPORT_REQ_TOO_MANY_SECTORS; | |
4134 | } | |
4135 | ||
4136 | return 0; | |
4137 | } | |
4138 | ||
4139 | static int transport_new_cmd_obj(struct se_cmd *cmd) | |
4140 | { | |
e3d6f909 | 4141 | struct se_device *dev = cmd->se_lun->lun_se_dev; |
c66ac9db NB |
4142 | u32 task_cdbs = 0, rc; |
4143 | ||
4144 | if (!(cmd->se_cmd_flags & SCF_SCSI_DATA_SG_IO_CDB)) { | |
4145 | task_cdbs++; | |
e3d6f909 | 4146 | cmd->t_task->t_task_cdbs++; |
c66ac9db NB |
4147 | } else { |
4148 | int set_counts = 1; | |
4149 | ||
4150 | /* | |
4151 | * Setup any BIDI READ tasks and memory from | |
e3d6f909 | 4152 | * cmd->t_task->t_mem_bidi_list so the READ struct se_tasks |
c66ac9db NB |
4153 | * are queued first for the non pSCSI passthrough case. |
4154 | */ | |
e3d6f909 AG |
4155 | if ((cmd->t_task->t_mem_bidi_list != NULL) && |
4156 | (dev->transport->transport_type != TRANSPORT_PLUGIN_PHBA_PDEV)) { | |
c66ac9db | 4157 | rc = transport_generic_get_cdb_count(cmd, |
e3d6f909 AG |
4158 | cmd->t_task->t_task_lba, |
4159 | cmd->t_task->t_tasks_sectors, | |
4160 | DMA_FROM_DEVICE, cmd->t_task->t_mem_bidi_list, | |
c66ac9db NB |
4161 | set_counts); |
4162 | if (!(rc)) { | |
4163 | cmd->se_cmd_flags |= SCF_SCSI_CDB_EXCEPTION; | |
4164 | cmd->scsi_sense_reason = | |
4165 | TCM_LOGICAL_UNIT_COMMUNICATION_FAILURE; | |
4166 | return PYX_TRANSPORT_LU_COMM_FAILURE; | |
4167 | } | |
4168 | set_counts = 0; | |
4169 | } | |
4170 | /* | |
e3d6f909 | 4171 | * Setup the tasks and memory from cmd->t_task->t_mem_list |
c66ac9db NB |
4172 | * Note for BIDI transfers this will contain the WRITE payload |
4173 | */ | |
4174 | task_cdbs = transport_generic_get_cdb_count(cmd, | |
e3d6f909 AG |
4175 | cmd->t_task->t_task_lba, |
4176 | cmd->t_task->t_tasks_sectors, | |
4177 | cmd->data_direction, cmd->t_task->t_mem_list, | |
c66ac9db NB |
4178 | set_counts); |
4179 | if (!(task_cdbs)) { | |
4180 | cmd->se_cmd_flags |= SCF_SCSI_CDB_EXCEPTION; | |
4181 | cmd->scsi_sense_reason = | |
4182 | TCM_LOGICAL_UNIT_COMMUNICATION_FAILURE; | |
4183 | return PYX_TRANSPORT_LU_COMM_FAILURE; | |
4184 | } | |
e3d6f909 | 4185 | cmd->t_task->t_task_cdbs += task_cdbs; |
c66ac9db NB |
4186 | |
4187 | #if 0 | |
4188 | printk(KERN_INFO "data_length: %u, LBA: %llu t_tasks_sectors:" | |
4189 | " %u, t_task_cdbs: %u\n", obj_ptr, cmd->data_length, | |
e3d6f909 AG |
4190 | cmd->t_task->t_task_lba, cmd->t_task->t_tasks_sectors, |
4191 | cmd->t_task->t_task_cdbs); | |
c66ac9db NB |
4192 | #endif |
4193 | } | |
4194 | ||
e3d6f909 AG |
4195 | atomic_set(&cmd->t_task->t_task_cdbs_left, task_cdbs); |
4196 | atomic_set(&cmd->t_task->t_task_cdbs_ex_left, task_cdbs); | |
4197 | atomic_set(&cmd->t_task->t_task_cdbs_timeout_left, task_cdbs); | |
c66ac9db NB |
4198 | return 0; |
4199 | } | |
4200 | ||
4201 | static struct list_head *transport_init_se_mem_list(void) | |
4202 | { | |
4203 | struct list_head *se_mem_list; | |
4204 | ||
4205 | se_mem_list = kzalloc(sizeof(struct list_head), GFP_KERNEL); | |
4206 | if (!(se_mem_list)) { | |
4207 | printk(KERN_ERR "Unable to allocate memory for se_mem_list\n"); | |
4208 | return NULL; | |
4209 | } | |
4210 | INIT_LIST_HEAD(se_mem_list); | |
4211 | ||
4212 | return se_mem_list; | |
4213 | } | |
4214 | ||
4215 | static int | |
4216 | transport_generic_get_mem(struct se_cmd *cmd, u32 length, u32 dma_size) | |
4217 | { | |
4218 | unsigned char *buf; | |
4219 | struct se_mem *se_mem; | |
4220 | ||
e3d6f909 AG |
4221 | cmd->t_task->t_mem_list = transport_init_se_mem_list(); |
4222 | if (!(cmd->t_task->t_mem_list)) | |
c66ac9db NB |
4223 | return -ENOMEM; |
4224 | ||
4225 | /* | |
4226 | * If the device uses memory mapping this is enough. | |
4227 | */ | |
4228 | if (cmd->se_dev->transport->do_se_mem_map) | |
4229 | return 0; | |
4230 | ||
4231 | /* | |
4232 | * Setup BIDI-COMMAND READ list of struct se_mem elements | |
4233 | */ | |
e3d6f909 AG |
4234 | if (cmd->t_task->t_tasks_bidi) { |
4235 | cmd->t_task->t_mem_bidi_list = transport_init_se_mem_list(); | |
4236 | if (!(cmd->t_task->t_mem_bidi_list)) { | |
4237 | kfree(cmd->t_task->t_mem_list); | |
c66ac9db NB |
4238 | return -ENOMEM; |
4239 | } | |
4240 | } | |
4241 | ||
4242 | while (length) { | |
4243 | se_mem = kmem_cache_zalloc(se_mem_cache, GFP_KERNEL); | |
4244 | if (!(se_mem)) { | |
4245 | printk(KERN_ERR "Unable to allocate struct se_mem\n"); | |
4246 | goto out; | |
4247 | } | |
c66ac9db NB |
4248 | |
4249 | /* #warning FIXME Allocate contigous pages for struct se_mem elements */ | |
87210568 | 4250 | se_mem->se_page = alloc_pages(GFP_KERNEL, 0); |
c66ac9db NB |
4251 | if (!(se_mem->se_page)) { |
4252 | printk(KERN_ERR "alloc_pages() failed\n"); | |
4253 | goto out; | |
4254 | } | |
4255 | ||
4256 | buf = kmap_atomic(se_mem->se_page, KM_IRQ0); | |
4257 | if (!(buf)) { | |
4258 | printk(KERN_ERR "kmap_atomic() failed\n"); | |
4259 | goto out; | |
4260 | } | |
87210568 JJ |
4261 | INIT_LIST_HEAD(&se_mem->se_list); |
4262 | se_mem->se_len = (length > dma_size) ? dma_size : length; | |
c66ac9db NB |
4263 | memset(buf, 0, se_mem->se_len); |
4264 | kunmap_atomic(buf, KM_IRQ0); | |
4265 | ||
e3d6f909 AG |
4266 | list_add_tail(&se_mem->se_list, cmd->t_task->t_mem_list); |
4267 | cmd->t_task->t_tasks_se_num++; | |
c66ac9db NB |
4268 | |
4269 | DEBUG_MEM("Allocated struct se_mem page(%p) Length(%u)" | |
4270 | " Offset(%u)\n", se_mem->se_page, se_mem->se_len, | |
4271 | se_mem->se_off); | |
4272 | ||
4273 | length -= se_mem->se_len; | |
4274 | } | |
4275 | ||
4276 | DEBUG_MEM("Allocated total struct se_mem elements(%u)\n", | |
e3d6f909 | 4277 | cmd->t_task->t_tasks_se_num); |
c66ac9db NB |
4278 | |
4279 | return 0; | |
4280 | out: | |
87210568 JJ |
4281 | if (se_mem) |
4282 | __free_pages(se_mem->se_page, 0); | |
4283 | kmem_cache_free(se_mem_cache, se_mem); | |
e3d6f909 | 4284 | return -ENOMEM; |
c66ac9db NB |
4285 | } |
4286 | ||
e3d6f909 | 4287 | int transport_init_task_sg( |
c66ac9db NB |
4288 | struct se_task *task, |
4289 | struct se_mem *in_se_mem, | |
4290 | u32 task_offset) | |
4291 | { | |
4292 | struct se_cmd *se_cmd = task->task_se_cmd; | |
e3d6f909 | 4293 | struct se_device *se_dev = se_cmd->se_lun->lun_se_dev; |
c66ac9db | 4294 | struct se_mem *se_mem = in_se_mem; |
e3d6f909 | 4295 | struct target_core_fabric_ops *tfo = se_cmd->se_tfo; |
c66ac9db NB |
4296 | u32 sg_length, task_size = task->task_size, task_sg_num_padded; |
4297 | ||
4298 | while (task_size != 0) { | |
4299 | DEBUG_SC("se_mem->se_page(%p) se_mem->se_len(%u)" | |
4300 | " se_mem->se_off(%u) task_offset(%u)\n", | |
4301 | se_mem->se_page, se_mem->se_len, | |
4302 | se_mem->se_off, task_offset); | |
4303 | ||
4304 | if (task_offset == 0) { | |
4305 | if (task_size >= se_mem->se_len) { | |
4306 | sg_length = se_mem->se_len; | |
4307 | ||
4308 | if (!(list_is_last(&se_mem->se_list, | |
e3d6f909 | 4309 | se_cmd->t_task->t_mem_list))) |
c66ac9db NB |
4310 | se_mem = list_entry(se_mem->se_list.next, |
4311 | struct se_mem, se_list); | |
4312 | } else { | |
4313 | sg_length = task_size; | |
4314 | task_size -= sg_length; | |
4315 | goto next; | |
4316 | } | |
4317 | ||
4318 | DEBUG_SC("sg_length(%u) task_size(%u)\n", | |
4319 | sg_length, task_size); | |
4320 | } else { | |
4321 | if ((se_mem->se_len - task_offset) > task_size) { | |
4322 | sg_length = task_size; | |
4323 | task_size -= sg_length; | |
4324 | goto next; | |
4325 | } else { | |
4326 | sg_length = (se_mem->se_len - task_offset); | |
4327 | ||
4328 | if (!(list_is_last(&se_mem->se_list, | |
e3d6f909 | 4329 | se_cmd->t_task->t_mem_list))) |
c66ac9db NB |
4330 | se_mem = list_entry(se_mem->se_list.next, |
4331 | struct se_mem, se_list); | |
4332 | } | |
4333 | ||
4334 | DEBUG_SC("sg_length(%u) task_size(%u)\n", | |
4335 | sg_length, task_size); | |
4336 | ||
4337 | task_offset = 0; | |
4338 | } | |
4339 | task_size -= sg_length; | |
4340 | next: | |
4341 | DEBUG_SC("task[%u] - Reducing task_size to(%u)\n", | |
4342 | task->task_no, task_size); | |
4343 | ||
4344 | task->task_sg_num++; | |
4345 | } | |
4346 | /* | |
4347 | * Check if the fabric module driver is requesting that all | |
4348 | * struct se_task->task_sg[] be chained together.. If so, | |
4349 | * then allocate an extra padding SG entry for linking and | |
4350 | * marking the end of the chained SGL. | |
4351 | */ | |
4352 | if (tfo->task_sg_chaining) { | |
4353 | task_sg_num_padded = (task->task_sg_num + 1); | |
4354 | task->task_padded_sg = 1; | |
4355 | } else | |
4356 | task_sg_num_padded = task->task_sg_num; | |
4357 | ||
4358 | task->task_sg = kzalloc(task_sg_num_padded * | |
4359 | sizeof(struct scatterlist), GFP_KERNEL); | |
4360 | if (!(task->task_sg)) { | |
4361 | printk(KERN_ERR "Unable to allocate memory for" | |
4362 | " task->task_sg\n"); | |
e3d6f909 | 4363 | return -ENOMEM; |
c66ac9db NB |
4364 | } |
4365 | sg_init_table(&task->task_sg[0], task_sg_num_padded); | |
4366 | /* | |
4367 | * Setup task->task_sg_bidi for SCSI READ payload for | |
4368 | * TCM/pSCSI passthrough if present for BIDI-COMMAND | |
4369 | */ | |
e3d6f909 AG |
4370 | if ((se_cmd->t_task->t_mem_bidi_list != NULL) && |
4371 | (se_dev->transport->transport_type == TRANSPORT_PLUGIN_PHBA_PDEV)) { | |
c66ac9db NB |
4372 | task->task_sg_bidi = kzalloc(task_sg_num_padded * |
4373 | sizeof(struct scatterlist), GFP_KERNEL); | |
4374 | if (!(task->task_sg_bidi)) { | |
e3d6f909 AG |
4375 | kfree(task->task_sg); |
4376 | task->task_sg = NULL; | |
c66ac9db NB |
4377 | printk(KERN_ERR "Unable to allocate memory for" |
4378 | " task->task_sg_bidi\n"); | |
e3d6f909 | 4379 | return -ENOMEM; |
c66ac9db NB |
4380 | } |
4381 | sg_init_table(&task->task_sg_bidi[0], task_sg_num_padded); | |
4382 | } | |
4383 | /* | |
4384 | * For the chaining case, setup the proper end of SGL for the | |
4385 | * initial submission struct task into struct se_subsystem_api. | |
4386 | * This will be cleared later by transport_do_task_sg_chain() | |
4387 | */ | |
4388 | if (task->task_padded_sg) { | |
4389 | sg_mark_end(&task->task_sg[task->task_sg_num - 1]); | |
4390 | /* | |
4391 | * Added the 'if' check before marking end of bi-directional | |
4392 | * scatterlist (which gets created only in case of request | |
4393 | * (RD + WR). | |
4394 | */ | |
4395 | if (task->task_sg_bidi) | |
4396 | sg_mark_end(&task->task_sg_bidi[task->task_sg_num - 1]); | |
4397 | } | |
4398 | ||
4399 | DEBUG_SC("Successfully allocated task->task_sg_num(%u)," | |
4400 | " task_sg_num_padded(%u)\n", task->task_sg_num, | |
4401 | task_sg_num_padded); | |
4402 | ||
4403 | return task->task_sg_num; | |
4404 | } | |
4405 | ||
4406 | static inline int transport_set_tasks_sectors_disk( | |
4407 | struct se_task *task, | |
4408 | struct se_device *dev, | |
4409 | unsigned long long lba, | |
4410 | u32 sectors, | |
4411 | int *max_sectors_set) | |
4412 | { | |
4413 | if ((lba + sectors) > transport_dev_end_lba(dev)) { | |
4414 | task->task_sectors = ((transport_dev_end_lba(dev) - lba) + 1); | |
4415 | ||
e3d6f909 AG |
4416 | if (task->task_sectors > dev->se_sub_dev->se_dev_attrib.max_sectors) { |
4417 | task->task_sectors = dev->se_sub_dev->se_dev_attrib.max_sectors; | |
c66ac9db NB |
4418 | *max_sectors_set = 1; |
4419 | } | |
4420 | } else { | |
e3d6f909 AG |
4421 | if (sectors > dev->se_sub_dev->se_dev_attrib.max_sectors) { |
4422 | task->task_sectors = dev->se_sub_dev->se_dev_attrib.max_sectors; | |
c66ac9db NB |
4423 | *max_sectors_set = 1; |
4424 | } else | |
4425 | task->task_sectors = sectors; | |
4426 | } | |
4427 | ||
4428 | return 0; | |
4429 | } | |
4430 | ||
4431 | static inline int transport_set_tasks_sectors_non_disk( | |
4432 | struct se_task *task, | |
4433 | struct se_device *dev, | |
4434 | unsigned long long lba, | |
4435 | u32 sectors, | |
4436 | int *max_sectors_set) | |
4437 | { | |
e3d6f909 AG |
4438 | if (sectors > dev->se_sub_dev->se_dev_attrib.max_sectors) { |
4439 | task->task_sectors = dev->se_sub_dev->se_dev_attrib.max_sectors; | |
c66ac9db NB |
4440 | *max_sectors_set = 1; |
4441 | } else | |
4442 | task->task_sectors = sectors; | |
4443 | ||
4444 | return 0; | |
4445 | } | |
4446 | ||
4447 | static inline int transport_set_tasks_sectors( | |
4448 | struct se_task *task, | |
4449 | struct se_device *dev, | |
4450 | unsigned long long lba, | |
4451 | u32 sectors, | |
4452 | int *max_sectors_set) | |
4453 | { | |
e3d6f909 | 4454 | return (dev->transport->get_device_type(dev) == TYPE_DISK) ? |
c66ac9db NB |
4455 | transport_set_tasks_sectors_disk(task, dev, lba, sectors, |
4456 | max_sectors_set) : | |
4457 | transport_set_tasks_sectors_non_disk(task, dev, lba, sectors, | |
4458 | max_sectors_set); | |
4459 | } | |
4460 | ||
4461 | static int transport_map_sg_to_mem( | |
4462 | struct se_cmd *cmd, | |
4463 | struct list_head *se_mem_list, | |
4464 | void *in_mem, | |
4465 | u32 *se_mem_cnt) | |
4466 | { | |
4467 | struct se_mem *se_mem; | |
4468 | struct scatterlist *sg; | |
4469 | u32 sg_count = 1, cmd_size = cmd->data_length; | |
4470 | ||
e3d6f909 AG |
4471 | WARN_ON(!in_mem); |
4472 | ||
c66ac9db NB |
4473 | sg = (struct scatterlist *)in_mem; |
4474 | ||
4475 | while (cmd_size) { | |
4476 | se_mem = kmem_cache_zalloc(se_mem_cache, GFP_KERNEL); | |
4477 | if (!(se_mem)) { | |
4478 | printk(KERN_ERR "Unable to allocate struct se_mem\n"); | |
e3d6f909 | 4479 | return -ENOMEM; |
c66ac9db NB |
4480 | } |
4481 | INIT_LIST_HEAD(&se_mem->se_list); | |
4482 | DEBUG_MEM("sg_to_mem: Starting loop with cmd_size: %u" | |
4483 | " sg_page: %p offset: %d length: %d\n", cmd_size, | |
4484 | sg_page(sg), sg->offset, sg->length); | |
4485 | ||
4486 | se_mem->se_page = sg_page(sg); | |
4487 | se_mem->se_off = sg->offset; | |
4488 | ||
4489 | if (cmd_size > sg->length) { | |
4490 | se_mem->se_len = sg->length; | |
4491 | sg = sg_next(sg); | |
4492 | sg_count++; | |
4493 | } else | |
4494 | se_mem->se_len = cmd_size; | |
4495 | ||
4496 | cmd_size -= se_mem->se_len; | |
4497 | ||
4498 | DEBUG_MEM("sg_to_mem: *se_mem_cnt: %u cmd_size: %u\n", | |
4499 | *se_mem_cnt, cmd_size); | |
4500 | DEBUG_MEM("sg_to_mem: Final se_page: %p se_off: %d se_len: %d\n", | |
4501 | se_mem->se_page, se_mem->se_off, se_mem->se_len); | |
4502 | ||
4503 | list_add_tail(&se_mem->se_list, se_mem_list); | |
4504 | (*se_mem_cnt)++; | |
4505 | } | |
4506 | ||
4507 | DEBUG_MEM("task[0] - Mapped(%u) struct scatterlist segments to(%u)" | |
4508 | " struct se_mem\n", sg_count, *se_mem_cnt); | |
4509 | ||
4510 | if (sg_count != *se_mem_cnt) | |
4511 | BUG(); | |
4512 | ||
4513 | return 0; | |
4514 | } | |
4515 | ||
4516 | /* transport_map_mem_to_sg(): | |
4517 | * | |
4518 | * | |
4519 | */ | |
4520 | int transport_map_mem_to_sg( | |
4521 | struct se_task *task, | |
4522 | struct list_head *se_mem_list, | |
4523 | void *in_mem, | |
4524 | struct se_mem *in_se_mem, | |
4525 | struct se_mem **out_se_mem, | |
4526 | u32 *se_mem_cnt, | |
4527 | u32 *task_offset) | |
4528 | { | |
4529 | struct se_cmd *se_cmd = task->task_se_cmd; | |
4530 | struct se_mem *se_mem = in_se_mem; | |
4531 | struct scatterlist *sg = (struct scatterlist *)in_mem; | |
4532 | u32 task_size = task->task_size, sg_no = 0; | |
4533 | ||
4534 | if (!sg) { | |
4535 | printk(KERN_ERR "Unable to locate valid struct" | |
4536 | " scatterlist pointer\n"); | |
e3d6f909 | 4537 | return -EINVAL; |
c66ac9db NB |
4538 | } |
4539 | ||
4540 | while (task_size != 0) { | |
4541 | /* | |
4542 | * Setup the contigious array of scatterlists for | |
4543 | * this struct se_task. | |
4544 | */ | |
4545 | sg_assign_page(sg, se_mem->se_page); | |
4546 | ||
4547 | if (*task_offset == 0) { | |
4548 | sg->offset = se_mem->se_off; | |
4549 | ||
4550 | if (task_size >= se_mem->se_len) { | |
4551 | sg->length = se_mem->se_len; | |
4552 | ||
4553 | if (!(list_is_last(&se_mem->se_list, | |
e3d6f909 | 4554 | se_cmd->t_task->t_mem_list))) { |
c66ac9db NB |
4555 | se_mem = list_entry(se_mem->se_list.next, |
4556 | struct se_mem, se_list); | |
4557 | (*se_mem_cnt)++; | |
4558 | } | |
4559 | } else { | |
4560 | sg->length = task_size; | |
4561 | /* | |
4562 | * Determine if we need to calculate an offset | |
4563 | * into the struct se_mem on the next go around.. | |
4564 | */ | |
4565 | task_size -= sg->length; | |
4566 | if (!(task_size)) | |
4567 | *task_offset = sg->length; | |
4568 | ||
4569 | goto next; | |
4570 | } | |
4571 | ||
4572 | } else { | |
4573 | sg->offset = (*task_offset + se_mem->se_off); | |
4574 | ||
4575 | if ((se_mem->se_len - *task_offset) > task_size) { | |
4576 | sg->length = task_size; | |
4577 | /* | |
4578 | * Determine if we need to calculate an offset | |
4579 | * into the struct se_mem on the next go around.. | |
4580 | */ | |
4581 | task_size -= sg->length; | |
4582 | if (!(task_size)) | |
4583 | *task_offset += sg->length; | |
4584 | ||
4585 | goto next; | |
4586 | } else { | |
4587 | sg->length = (se_mem->se_len - *task_offset); | |
4588 | ||
4589 | if (!(list_is_last(&se_mem->se_list, | |
e3d6f909 | 4590 | se_cmd->t_task->t_mem_list))) { |
c66ac9db NB |
4591 | se_mem = list_entry(se_mem->se_list.next, |
4592 | struct se_mem, se_list); | |
4593 | (*se_mem_cnt)++; | |
4594 | } | |
4595 | } | |
4596 | ||
4597 | *task_offset = 0; | |
4598 | } | |
4599 | task_size -= sg->length; | |
4600 | next: | |
4601 | DEBUG_MEM("task[%u] mem_to_sg - sg[%u](%p)(%u)(%u) - Reducing" | |
4602 | " task_size to(%u), task_offset: %u\n", task->task_no, sg_no, | |
4603 | sg_page(sg), sg->length, sg->offset, task_size, *task_offset); | |
4604 | ||
4605 | sg_no++; | |
4606 | if (!(task_size)) | |
4607 | break; | |
4608 | ||
4609 | sg = sg_next(sg); | |
4610 | ||
4611 | if (task_size > se_cmd->data_length) | |
4612 | BUG(); | |
4613 | } | |
4614 | *out_se_mem = se_mem; | |
4615 | ||
4616 | DEBUG_MEM("task[%u] - Mapped(%u) struct se_mem segments to total(%u)" | |
4617 | " SGs\n", task->task_no, *se_mem_cnt, sg_no); | |
4618 | ||
4619 | return 0; | |
4620 | } | |
4621 | ||
4622 | /* | |
4623 | * This function can be used by HW target mode drivers to create a linked | |
4624 | * scatterlist from all contiguously allocated struct se_task->task_sg[]. | |
4625 | * This is intended to be called during the completion path by TCM Core | |
4626 | * when struct target_core_fabric_ops->check_task_sg_chaining is enabled. | |
4627 | */ | |
4628 | void transport_do_task_sg_chain(struct se_cmd *cmd) | |
4629 | { | |
4630 | struct scatterlist *sg_head = NULL, *sg_link = NULL, *sg_first = NULL; | |
4631 | struct scatterlist *sg_head_cur = NULL, *sg_link_cur = NULL; | |
4632 | struct scatterlist *sg, *sg_end = NULL, *sg_end_cur = NULL; | |
4633 | struct se_task *task; | |
e3d6f909 | 4634 | struct target_core_fabric_ops *tfo = cmd->se_tfo; |
c66ac9db NB |
4635 | u32 task_sg_num = 0, sg_count = 0; |
4636 | int i; | |
4637 | ||
4638 | if (tfo->task_sg_chaining == 0) { | |
4639 | printk(KERN_ERR "task_sg_chaining is diabled for fabric module:" | |
4640 | " %s\n", tfo->get_fabric_name()); | |
4641 | dump_stack(); | |
4642 | return; | |
4643 | } | |
4644 | /* | |
4645 | * Walk the struct se_task list and setup scatterlist chains | |
4646 | * for each contiguosly allocated struct se_task->task_sg[]. | |
4647 | */ | |
e3d6f909 | 4648 | list_for_each_entry(task, &cmd->t_task->t_task_list, t_list) { |
c66ac9db NB |
4649 | if (!(task->task_sg) || !(task->task_padded_sg)) |
4650 | continue; | |
4651 | ||
4652 | if (sg_head && sg_link) { | |
4653 | sg_head_cur = &task->task_sg[0]; | |
4654 | sg_link_cur = &task->task_sg[task->task_sg_num]; | |
4655 | /* | |
4656 | * Either add chain or mark end of scatterlist | |
4657 | */ | |
4658 | if (!(list_is_last(&task->t_list, | |
e3d6f909 | 4659 | &cmd->t_task->t_task_list))) { |
c66ac9db NB |
4660 | /* |
4661 | * Clear existing SGL termination bit set in | |
e3d6f909 | 4662 | * transport_init_task_sg(), see sg_mark_end() |
c66ac9db NB |
4663 | */ |
4664 | sg_end_cur = &task->task_sg[task->task_sg_num - 1]; | |
4665 | sg_end_cur->page_link &= ~0x02; | |
4666 | ||
4667 | sg_chain(sg_head, task_sg_num, sg_head_cur); | |
c66ac9db | 4668 | sg_count += task->task_sg_num; |
97868c89 NB |
4669 | task_sg_num = (task->task_sg_num + 1); |
4670 | } else { | |
4671 | sg_chain(sg_head, task_sg_num, sg_head_cur); | |
4672 | sg_count += task->task_sg_num; | |
4673 | task_sg_num = task->task_sg_num; | |
4674 | } | |
c66ac9db NB |
4675 | |
4676 | sg_head = sg_head_cur; | |
4677 | sg_link = sg_link_cur; | |
c66ac9db NB |
4678 | continue; |
4679 | } | |
4680 | sg_head = sg_first = &task->task_sg[0]; | |
4681 | sg_link = &task->task_sg[task->task_sg_num]; | |
c66ac9db NB |
4682 | /* |
4683 | * Check for single task.. | |
4684 | */ | |
e3d6f909 | 4685 | if (!(list_is_last(&task->t_list, &cmd->t_task->t_task_list))) { |
c66ac9db NB |
4686 | /* |
4687 | * Clear existing SGL termination bit set in | |
e3d6f909 | 4688 | * transport_init_task_sg(), see sg_mark_end() |
c66ac9db NB |
4689 | */ |
4690 | sg_end = &task->task_sg[task->task_sg_num - 1]; | |
4691 | sg_end->page_link &= ~0x02; | |
c66ac9db | 4692 | sg_count += task->task_sg_num; |
97868c89 NB |
4693 | task_sg_num = (task->task_sg_num + 1); |
4694 | } else { | |
4695 | sg_count += task->task_sg_num; | |
4696 | task_sg_num = task->task_sg_num; | |
4697 | } | |
c66ac9db NB |
4698 | } |
4699 | /* | |
4700 | * Setup the starting pointer and total t_tasks_sg_linked_no including | |
4701 | * padding SGs for linking and to mark the end. | |
4702 | */ | |
e3d6f909 AG |
4703 | cmd->t_task->t_tasks_sg_chained = sg_first; |
4704 | cmd->t_task->t_tasks_sg_chained_no = sg_count; | |
c66ac9db | 4705 | |
e3d6f909 AG |
4706 | DEBUG_CMD_M("Setup cmd: %p cmd->t_task->t_tasks_sg_chained: %p and" |
4707 | " t_tasks_sg_chained_no: %u\n", cmd, cmd->t_task->t_tasks_sg_chained, | |
4708 | cmd->t_task->t_tasks_sg_chained_no); | |
c66ac9db | 4709 | |
e3d6f909 AG |
4710 | for_each_sg(cmd->t_task->t_tasks_sg_chained, sg, |
4711 | cmd->t_task->t_tasks_sg_chained_no, i) { | |
c66ac9db | 4712 | |
97868c89 NB |
4713 | DEBUG_CMD_M("SG[%d]: %p page: %p length: %d offset: %d, magic: 0x%08x\n", |
4714 | i, sg, sg_page(sg), sg->length, sg->offset, sg->sg_magic); | |
c66ac9db NB |
4715 | if (sg_is_chain(sg)) |
4716 | DEBUG_CMD_M("SG: %p sg_is_chain=1\n", sg); | |
4717 | if (sg_is_last(sg)) | |
4718 | DEBUG_CMD_M("SG: %p sg_is_last=1\n", sg); | |
4719 | } | |
c66ac9db NB |
4720 | } |
4721 | EXPORT_SYMBOL(transport_do_task_sg_chain); | |
4722 | ||
4723 | static int transport_do_se_mem_map( | |
4724 | struct se_device *dev, | |
4725 | struct se_task *task, | |
4726 | struct list_head *se_mem_list, | |
4727 | void *in_mem, | |
4728 | struct se_mem *in_se_mem, | |
4729 | struct se_mem **out_se_mem, | |
4730 | u32 *se_mem_cnt, | |
4731 | u32 *task_offset_in) | |
4732 | { | |
4733 | u32 task_offset = *task_offset_in; | |
4734 | int ret = 0; | |
4735 | /* | |
4736 | * se_subsystem_api_t->do_se_mem_map is used when internal allocation | |
4737 | * has been done by the transport plugin. | |
4738 | */ | |
e3d6f909 AG |
4739 | if (dev->transport->do_se_mem_map) { |
4740 | ret = dev->transport->do_se_mem_map(task, se_mem_list, | |
c66ac9db NB |
4741 | in_mem, in_se_mem, out_se_mem, se_mem_cnt, |
4742 | task_offset_in); | |
4743 | if (ret == 0) | |
e3d6f909 | 4744 | task->task_se_cmd->t_task->t_tasks_se_num += *se_mem_cnt; |
c66ac9db NB |
4745 | |
4746 | return ret; | |
4747 | } | |
e63af958 NB |
4748 | |
4749 | BUG_ON(list_empty(se_mem_list)); | |
c66ac9db NB |
4750 | /* |
4751 | * This is the normal path for all normal non BIDI and BIDI-COMMAND | |
4752 | * WRITE payloads.. If we need to do BIDI READ passthrough for | |
4753 | * TCM/pSCSI the first call to transport_do_se_mem_map -> | |
e3d6f909 | 4754 | * transport_init_task_sg() -> transport_map_mem_to_sg() will do the |
c66ac9db NB |
4755 | * allocation for task->task_sg_bidi, and the subsequent call to |
4756 | * transport_do_se_mem_map() from transport_generic_get_cdb_count() | |
4757 | */ | |
4758 | if (!(task->task_sg_bidi)) { | |
4759 | /* | |
4760 | * Assume default that transport plugin speaks preallocated | |
4761 | * scatterlists. | |
4762 | */ | |
e3d6f909 AG |
4763 | ret = transport_init_task_sg(task, in_se_mem, task_offset); |
4764 | if (ret <= 0) | |
4765 | return ret; | |
c66ac9db NB |
4766 | /* |
4767 | * struct se_task->task_sg now contains the struct scatterlist array. | |
4768 | */ | |
4769 | return transport_map_mem_to_sg(task, se_mem_list, task->task_sg, | |
4770 | in_se_mem, out_se_mem, se_mem_cnt, | |
4771 | task_offset_in); | |
4772 | } | |
4773 | /* | |
4774 | * Handle the se_mem_list -> struct task->task_sg_bidi | |
4775 | * memory map for the extra BIDI READ payload | |
4776 | */ | |
4777 | return transport_map_mem_to_sg(task, se_mem_list, task->task_sg_bidi, | |
4778 | in_se_mem, out_se_mem, se_mem_cnt, | |
4779 | task_offset_in); | |
4780 | } | |
4781 | ||
4782 | static u32 transport_generic_get_cdb_count( | |
4783 | struct se_cmd *cmd, | |
4784 | unsigned long long lba, | |
4785 | u32 sectors, | |
4786 | enum dma_data_direction data_direction, | |
4787 | struct list_head *mem_list, | |
4788 | int set_counts) | |
4789 | { | |
4790 | unsigned char *cdb = NULL; | |
4791 | struct se_task *task; | |
4792 | struct se_mem *se_mem = NULL, *se_mem_lout = NULL; | |
4793 | struct se_mem *se_mem_bidi = NULL, *se_mem_bidi_lout = NULL; | |
e3d6f909 | 4794 | struct se_device *dev = cmd->se_lun->lun_se_dev; |
c66ac9db NB |
4795 | int max_sectors_set = 0, ret; |
4796 | u32 task_offset_in = 0, se_mem_cnt = 0, se_mem_bidi_cnt = 0, task_cdbs = 0; | |
4797 | ||
4798 | if (!mem_list) { | |
4799 | printk(KERN_ERR "mem_list is NULL in transport_generic_get" | |
4800 | "_cdb_count()\n"); | |
4801 | return 0; | |
4802 | } | |
4803 | /* | |
4804 | * While using RAMDISK_DR backstores is the only case where | |
4805 | * mem_list will ever be empty at this point. | |
4806 | */ | |
4807 | if (!(list_empty(mem_list))) | |
4808 | se_mem = list_entry(mem_list->next, struct se_mem, se_list); | |
4809 | /* | |
4810 | * Check for extra se_mem_bidi mapping for BIDI-COMMANDs to | |
4811 | * struct se_task->task_sg_bidi for TCM/pSCSI passthrough operation | |
4812 | */ | |
e3d6f909 AG |
4813 | if ((cmd->t_task->t_mem_bidi_list != NULL) && |
4814 | !(list_empty(cmd->t_task->t_mem_bidi_list)) && | |
4815 | (dev->transport->transport_type == TRANSPORT_PLUGIN_PHBA_PDEV)) | |
4816 | se_mem_bidi = list_entry(cmd->t_task->t_mem_bidi_list->next, | |
c66ac9db NB |
4817 | struct se_mem, se_list); |
4818 | ||
4819 | while (sectors) { | |
4820 | DEBUG_VOL("ITT[0x%08x] LBA(%llu) SectorsLeft(%u) EOBJ(%llu)\n", | |
e3d6f909 | 4821 | cmd->se_tfo->get_task_tag(cmd), lba, sectors, |
c66ac9db NB |
4822 | transport_dev_end_lba(dev)); |
4823 | ||
4824 | task = transport_generic_get_task(cmd, data_direction); | |
4825 | if (!(task)) | |
4826 | goto out; | |
4827 | ||
4828 | transport_set_tasks_sectors(task, dev, lba, sectors, | |
4829 | &max_sectors_set); | |
4830 | ||
4831 | task->task_lba = lba; | |
4832 | lba += task->task_sectors; | |
4833 | sectors -= task->task_sectors; | |
4834 | task->task_size = (task->task_sectors * | |
e3d6f909 | 4835 | dev->se_sub_dev->se_dev_attrib.block_size); |
c66ac9db | 4836 | |
e3d6f909 | 4837 | cdb = dev->transport->get_cdb(task); |
c66ac9db | 4838 | if ((cdb)) { |
e3d6f909 AG |
4839 | memcpy(cdb, cmd->t_task->t_task_cdb, |
4840 | scsi_command_size(cmd->t_task->t_task_cdb)); | |
c66ac9db NB |
4841 | cmd->transport_split_cdb(task->task_lba, |
4842 | &task->task_sectors, cdb); | |
4843 | } | |
4844 | ||
4845 | /* | |
4846 | * Perform the SE OBJ plugin and/or Transport plugin specific | |
e3d6f909 | 4847 | * mapping for cmd->t_task->t_mem_list. And setup the |
c66ac9db NB |
4848 | * task->task_sg and if necessary task->task_sg_bidi |
4849 | */ | |
4850 | ret = transport_do_se_mem_map(dev, task, mem_list, | |
4851 | NULL, se_mem, &se_mem_lout, &se_mem_cnt, | |
4852 | &task_offset_in); | |
4853 | if (ret < 0) | |
4854 | goto out; | |
4855 | ||
4856 | se_mem = se_mem_lout; | |
4857 | /* | |
e3d6f909 | 4858 | * Setup the cmd->t_task->t_mem_bidi_list -> task->task_sg_bidi |
c66ac9db NB |
4859 | * mapping for SCSI READ for BIDI-COMMAND passthrough with TCM/pSCSI |
4860 | * | |
4861 | * Note that the first call to transport_do_se_mem_map() above will | |
4862 | * allocate struct se_task->task_sg_bidi in transport_do_se_mem_map() | |
e3d6f909 | 4863 | * -> transport_init_task_sg(), and the second here will do the |
c66ac9db NB |
4864 | * mapping for SCSI READ for BIDI-COMMAND passthrough with TCM/pSCSI. |
4865 | */ | |
4866 | if (task->task_sg_bidi != NULL) { | |
4867 | ret = transport_do_se_mem_map(dev, task, | |
e3d6f909 | 4868 | cmd->t_task->t_mem_bidi_list, NULL, |
c66ac9db NB |
4869 | se_mem_bidi, &se_mem_bidi_lout, &se_mem_bidi_cnt, |
4870 | &task_offset_in); | |
4871 | if (ret < 0) | |
4872 | goto out; | |
4873 | ||
4874 | se_mem_bidi = se_mem_bidi_lout; | |
4875 | } | |
4876 | task_cdbs++; | |
4877 | ||
4878 | DEBUG_VOL("Incremented task_cdbs(%u) task->task_sg_num(%u)\n", | |
4879 | task_cdbs, task->task_sg_num); | |
4880 | ||
4881 | if (max_sectors_set) { | |
4882 | max_sectors_set = 0; | |
4883 | continue; | |
4884 | } | |
4885 | ||
4886 | if (!sectors) | |
4887 | break; | |
4888 | } | |
4889 | ||
4890 | if (set_counts) { | |
e3d6f909 AG |
4891 | atomic_inc(&cmd->t_task->t_fe_count); |
4892 | atomic_inc(&cmd->t_task->t_se_count); | |
c66ac9db NB |
4893 | } |
4894 | ||
4895 | DEBUG_VOL("ITT[0x%08x] total %s cdbs(%u)\n", | |
e3d6f909 | 4896 | cmd->se_tfo->get_task_tag(cmd), (data_direction == DMA_TO_DEVICE) |
c66ac9db NB |
4897 | ? "DMA_TO_DEVICE" : "DMA_FROM_DEVICE", task_cdbs); |
4898 | ||
4899 | return task_cdbs; | |
4900 | out: | |
4901 | return 0; | |
4902 | } | |
4903 | ||
4904 | static int | |
4905 | transport_map_control_cmd_to_task(struct se_cmd *cmd) | |
4906 | { | |
e3d6f909 | 4907 | struct se_device *dev = cmd->se_lun->lun_se_dev; |
c66ac9db NB |
4908 | unsigned char *cdb; |
4909 | struct se_task *task; | |
4910 | int ret; | |
4911 | ||
4912 | task = transport_generic_get_task(cmd, cmd->data_direction); | |
4913 | if (!task) | |
4914 | return PYX_TRANSPORT_OUT_OF_MEMORY_RESOURCES; | |
4915 | ||
e3d6f909 | 4916 | cdb = dev->transport->get_cdb(task); |
c66ac9db NB |
4917 | if (cdb) |
4918 | memcpy(cdb, cmd->t_task->t_task_cdb, | |
4919 | scsi_command_size(cmd->t_task->t_task_cdb)); | |
4920 | ||
4921 | task->task_size = cmd->data_length; | |
4922 | task->task_sg_num = | |
4923 | (cmd->se_cmd_flags & SCF_SCSI_CONTROL_SG_IO_CDB) ? 1 : 0; | |
4924 | ||
4925 | atomic_inc(&cmd->t_task->t_fe_count); | |
4926 | atomic_inc(&cmd->t_task->t_se_count); | |
4927 | ||
4928 | if (cmd->se_cmd_flags & SCF_SCSI_CONTROL_SG_IO_CDB) { | |
4929 | struct se_mem *se_mem = NULL, *se_mem_lout = NULL; | |
4930 | u32 se_mem_cnt = 0, task_offset = 0; | |
4931 | ||
e3d6f909 AG |
4932 | if (!list_empty(cmd->t_task->t_mem_list)) |
4933 | se_mem = list_entry(cmd->t_task->t_mem_list->next, | |
e63af958 | 4934 | struct se_mem, se_list); |
c66ac9db NB |
4935 | |
4936 | ret = transport_do_se_mem_map(dev, task, | |
4937 | cmd->t_task->t_mem_list, NULL, se_mem, | |
4938 | &se_mem_lout, &se_mem_cnt, &task_offset); | |
4939 | if (ret < 0) | |
4940 | return PYX_TRANSPORT_OUT_OF_MEMORY_RESOURCES; | |
4941 | ||
4942 | if (dev->transport->map_task_SG) | |
4943 | return dev->transport->map_task_SG(task); | |
4944 | return 0; | |
4945 | } else if (cmd->se_cmd_flags & SCF_SCSI_CONTROL_NONSG_IO_CDB) { | |
4946 | if (dev->transport->map_task_non_SG) | |
4947 | return dev->transport->map_task_non_SG(task); | |
4948 | return 0; | |
4949 | } else if (cmd->se_cmd_flags & SCF_SCSI_NON_DATA_CDB) { | |
4950 | if (dev->transport->cdb_none) | |
4951 | return dev->transport->cdb_none(task); | |
4952 | return 0; | |
4953 | } else { | |
4954 | BUG(); | |
4955 | return PYX_TRANSPORT_OUT_OF_MEMORY_RESOURCES; | |
4956 | } | |
4957 | } | |
4958 | ||
4959 | /* transport_generic_new_cmd(): Called from transport_processing_thread() | |
4960 | * | |
4961 | * Allocate storage transport resources from a set of values predefined | |
4962 | * by transport_generic_cmd_sequencer() from the iSCSI Target RX process. | |
4963 | * Any non zero return here is treated as an "out of resource' op here. | |
4964 | */ | |
4965 | /* | |
4966 | * Generate struct se_task(s) and/or their payloads for this CDB. | |
4967 | */ | |
4968 | static int transport_generic_new_cmd(struct se_cmd *cmd) | |
4969 | { | |
4970 | struct se_portal_group *se_tpg; | |
4971 | struct se_task *task; | |
e3d6f909 | 4972 | struct se_device *dev = cmd->se_lun->lun_se_dev; |
c66ac9db NB |
4973 | int ret = 0; |
4974 | ||
4975 | /* | |
4976 | * Determine is the TCM fabric module has already allocated physical | |
4977 | * memory, and is directly calling transport_generic_map_mem_to_cmd() | |
4978 | * to setup beforehand the linked list of physical memory at | |
e3d6f909 | 4979 | * cmd->t_task->t_mem_list of struct se_mem->se_page |
c66ac9db NB |
4980 | */ |
4981 | if (!(cmd->se_cmd_flags & SCF_PASSTHROUGH_SG_TO_MEM_NOALLOC)) { | |
4982 | ret = transport_allocate_resources(cmd); | |
4983 | if (ret < 0) | |
4984 | return ret; | |
4985 | } | |
4986 | ||
4987 | ret = transport_get_sectors(cmd); | |
4988 | if (ret < 0) | |
4989 | return ret; | |
4990 | ||
4991 | ret = transport_new_cmd_obj(cmd); | |
4992 | if (ret < 0) | |
4993 | return ret; | |
4994 | ||
4995 | /* | |
4996 | * Determine if the calling TCM fabric module is talking to | |
4997 | * Linux/NET via kernel sockets and needs to allocate a | |
4998 | * struct iovec array to complete the struct se_cmd | |
4999 | */ | |
e3d6f909 AG |
5000 | se_tpg = cmd->se_lun->lun_sep->sep_tpg; |
5001 | if (se_tpg->se_tpg_tfo->alloc_cmd_iovecs != NULL) { | |
5002 | ret = se_tpg->se_tpg_tfo->alloc_cmd_iovecs(cmd); | |
c66ac9db NB |
5003 | if (ret < 0) |
5004 | return PYX_TRANSPORT_OUT_OF_MEMORY_RESOURCES; | |
5005 | } | |
5006 | ||
5007 | if (cmd->se_cmd_flags & SCF_SCSI_DATA_SG_IO_CDB) { | |
e3d6f909 | 5008 | list_for_each_entry(task, &cmd->t_task->t_task_list, t_list) { |
c66ac9db NB |
5009 | if (atomic_read(&task->task_sent)) |
5010 | continue; | |
5011 | if (!dev->transport->map_task_SG) | |
5012 | continue; | |
5013 | ||
5014 | ret = dev->transport->map_task_SG(task); | |
5015 | if (ret < 0) | |
5016 | return ret; | |
5017 | } | |
5018 | } else { | |
5019 | ret = transport_map_control_cmd_to_task(cmd); | |
5020 | if (ret < 0) | |
5021 | return ret; | |
5022 | } | |
5023 | ||
5024 | /* | |
5025 | * For WRITEs, let the iSCSI Target RX Thread know its buffer is ready.. | |
5026 | * This WRITE struct se_cmd (and all of its associated struct se_task's) | |
5027 | * will be added to the struct se_device execution queue after its WRITE | |
5028 | * data has arrived. (ie: It gets handled by the transport processing | |
5029 | * thread a second time) | |
5030 | */ | |
5031 | if (cmd->data_direction == DMA_TO_DEVICE) { | |
5032 | transport_add_tasks_to_state_queue(cmd); | |
5033 | return transport_generic_write_pending(cmd); | |
5034 | } | |
5035 | /* | |
5036 | * Everything else but a WRITE, add the struct se_cmd's struct se_task's | |
5037 | * to the execution queue. | |
5038 | */ | |
5039 | transport_execute_tasks(cmd); | |
5040 | return 0; | |
5041 | } | |
5042 | ||
5043 | /* transport_generic_process_write(): | |
5044 | * | |
5045 | * | |
5046 | */ | |
5047 | void transport_generic_process_write(struct se_cmd *cmd) | |
5048 | { | |
5049 | #if 0 | |
5050 | /* | |
5051 | * Copy SCSI Presented DTL sector(s) from received buffers allocated to | |
5052 | * original EDTL | |
5053 | */ | |
5054 | if (cmd->se_cmd_flags & SCF_UNDERFLOW_BIT) { | |
e3d6f909 | 5055 | if (!cmd->t_task->t_tasks_se_num) { |
c66ac9db | 5056 | unsigned char *dst, *buf = |
e3d6f909 | 5057 | (unsigned char *)cmd->t_task->t_task_buf; |
c66ac9db NB |
5058 | |
5059 | dst = kzalloc(cmd->cmd_spdtl), GFP_KERNEL); | |
5060 | if (!(dst)) { | |
5061 | printk(KERN_ERR "Unable to allocate memory for" | |
5062 | " WRITE underflow\n"); | |
5063 | transport_generic_request_failure(cmd, NULL, | |
5064 | PYX_TRANSPORT_REQ_TOO_MANY_SECTORS, 1); | |
5065 | return; | |
5066 | } | |
5067 | memcpy(dst, buf, cmd->cmd_spdtl); | |
5068 | ||
e3d6f909 AG |
5069 | kfree(cmd->t_task->t_task_buf); |
5070 | cmd->t_task->t_task_buf = dst; | |
c66ac9db NB |
5071 | } else { |
5072 | struct scatterlist *sg = | |
e3d6f909 | 5073 | (struct scatterlist *sg)cmd->t_task->t_task_buf; |
c66ac9db NB |
5074 | struct scatterlist *orig_sg; |
5075 | ||
5076 | orig_sg = kzalloc(sizeof(struct scatterlist) * | |
e3d6f909 | 5077 | cmd->t_task->t_tasks_se_num, |
c66ac9db NB |
5078 | GFP_KERNEL))) { |
5079 | if (!(orig_sg)) { | |
5080 | printk(KERN_ERR "Unable to allocate memory" | |
5081 | " for WRITE underflow\n"); | |
5082 | transport_generic_request_failure(cmd, NULL, | |
5083 | PYX_TRANSPORT_REQ_TOO_MANY_SECTORS, 1); | |
5084 | return; | |
5085 | } | |
5086 | ||
e3d6f909 | 5087 | memcpy(orig_sg, cmd->t_task->t_task_buf, |
c66ac9db | 5088 | sizeof(struct scatterlist) * |
e3d6f909 | 5089 | cmd->t_task->t_tasks_se_num); |
c66ac9db NB |
5090 | |
5091 | cmd->data_length = cmd->cmd_spdtl; | |
5092 | /* | |
5093 | * FIXME, clear out original struct se_task and state | |
5094 | * information. | |
5095 | */ | |
5096 | if (transport_generic_new_cmd(cmd) < 0) { | |
5097 | transport_generic_request_failure(cmd, NULL, | |
5098 | PYX_TRANSPORT_REQ_TOO_MANY_SECTORS, 1); | |
5099 | kfree(orig_sg); | |
5100 | return; | |
5101 | } | |
5102 | ||
5103 | transport_memcpy_write_sg(cmd, orig_sg); | |
5104 | } | |
5105 | } | |
5106 | #endif | |
5107 | transport_execute_tasks(cmd); | |
5108 | } | |
5109 | EXPORT_SYMBOL(transport_generic_process_write); | |
5110 | ||
5111 | /* transport_generic_write_pending(): | |
5112 | * | |
5113 | * | |
5114 | */ | |
5115 | static int transport_generic_write_pending(struct se_cmd *cmd) | |
5116 | { | |
5117 | unsigned long flags; | |
5118 | int ret; | |
5119 | ||
e3d6f909 | 5120 | spin_lock_irqsave(&cmd->t_task->t_state_lock, flags); |
c66ac9db | 5121 | cmd->t_state = TRANSPORT_WRITE_PENDING; |
e3d6f909 | 5122 | spin_unlock_irqrestore(&cmd->t_task->t_state_lock, flags); |
c66ac9db NB |
5123 | /* |
5124 | * For the TCM control CDBs using a contiguous buffer, do the memcpy | |
5125 | * from the passed Linux/SCSI struct scatterlist located at | |
e3d6f909 AG |
5126 | * se_cmd->t_task->t_task_pt_buf to the contiguous buffer at |
5127 | * se_cmd->t_task->t_task_buf. | |
c66ac9db NB |
5128 | */ |
5129 | if (cmd->se_cmd_flags & SCF_PASSTHROUGH_CONTIG_TO_SG) | |
5130 | transport_memcpy_read_contig(cmd, | |
e3d6f909 AG |
5131 | cmd->t_task->t_task_buf, |
5132 | cmd->t_task->t_task_pt_sgl); | |
c66ac9db NB |
5133 | /* |
5134 | * Clear the se_cmd for WRITE_PENDING status in order to set | |
e3d6f909 | 5135 | * cmd->t_task->t_transport_active=0 so that transport_generic_handle_data |
c66ac9db | 5136 | * can be called from HW target mode interrupt code. This is safe |
e3d6f909 | 5137 | * to be called with transport_off=1 before the cmd->se_tfo->write_pending |
c66ac9db NB |
5138 | * because the se_cmd->se_lun pointer is not being cleared. |
5139 | */ | |
5140 | transport_cmd_check_stop(cmd, 1, 0); | |
5141 | ||
5142 | /* | |
5143 | * Call the fabric write_pending function here to let the | |
5144 | * frontend know that WRITE buffers are ready. | |
5145 | */ | |
e3d6f909 | 5146 | ret = cmd->se_tfo->write_pending(cmd); |
c66ac9db NB |
5147 | if (ret < 0) |
5148 | return ret; | |
5149 | ||
5150 | return PYX_TRANSPORT_WRITE_PENDING; | |
5151 | } | |
5152 | ||
5153 | /* transport_release_cmd_to_pool(): | |
5154 | * | |
5155 | * | |
5156 | */ | |
5157 | void transport_release_cmd_to_pool(struct se_cmd *cmd) | |
5158 | { | |
e3d6f909 AG |
5159 | BUG_ON(!cmd->t_task); |
5160 | BUG_ON(!cmd->se_tfo); | |
c66ac9db NB |
5161 | |
5162 | transport_free_se_cmd(cmd); | |
e3d6f909 | 5163 | cmd->se_tfo->release_cmd_to_pool(cmd); |
c66ac9db NB |
5164 | } |
5165 | EXPORT_SYMBOL(transport_release_cmd_to_pool); | |
5166 | ||
5167 | /* transport_generic_free_cmd(): | |
5168 | * | |
5169 | * Called from processing frontend to release storage engine resources | |
5170 | */ | |
5171 | void transport_generic_free_cmd( | |
5172 | struct se_cmd *cmd, | |
5173 | int wait_for_tasks, | |
5174 | int release_to_pool, | |
5175 | int session_reinstatement) | |
5176 | { | |
e3d6f909 | 5177 | if (!(cmd->se_cmd_flags & SCF_SE_LUN_CMD) || !cmd->t_task) |
c66ac9db NB |
5178 | transport_release_cmd_to_pool(cmd); |
5179 | else { | |
5180 | core_dec_lacl_count(cmd->se_sess->se_node_acl, cmd); | |
5181 | ||
e3d6f909 | 5182 | if (cmd->se_lun) { |
c66ac9db NB |
5183 | #if 0 |
5184 | printk(KERN_INFO "cmd: %p ITT: 0x%08x contains" | |
e3d6f909 AG |
5185 | " cmd->se_lun\n", cmd, |
5186 | cmd->se_tfo->get_task_tag(cmd)); | |
c66ac9db NB |
5187 | #endif |
5188 | transport_lun_remove_cmd(cmd); | |
5189 | } | |
5190 | ||
5191 | if (wait_for_tasks && cmd->transport_wait_for_tasks) | |
5192 | cmd->transport_wait_for_tasks(cmd, 0, 0); | |
5193 | ||
f4366772 NB |
5194 | transport_free_dev_tasks(cmd); |
5195 | ||
c66ac9db NB |
5196 | transport_generic_remove(cmd, release_to_pool, |
5197 | session_reinstatement); | |
5198 | } | |
5199 | } | |
5200 | EXPORT_SYMBOL(transport_generic_free_cmd); | |
5201 | ||
5202 | static void transport_nop_wait_for_tasks( | |
5203 | struct se_cmd *cmd, | |
5204 | int remove_cmd, | |
5205 | int session_reinstatement) | |
5206 | { | |
5207 | return; | |
5208 | } | |
5209 | ||
5210 | /* transport_lun_wait_for_tasks(): | |
5211 | * | |
5212 | * Called from ConfigFS context to stop the passed struct se_cmd to allow | |
5213 | * an struct se_lun to be successfully shutdown. | |
5214 | */ | |
5215 | static int transport_lun_wait_for_tasks(struct se_cmd *cmd, struct se_lun *lun) | |
5216 | { | |
5217 | unsigned long flags; | |
5218 | int ret; | |
5219 | /* | |
5220 | * If the frontend has already requested this struct se_cmd to | |
5221 | * be stopped, we can safely ignore this struct se_cmd. | |
5222 | */ | |
e3d6f909 AG |
5223 | spin_lock_irqsave(&cmd->t_task->t_state_lock, flags); |
5224 | if (atomic_read(&cmd->t_task->t_transport_stop)) { | |
5225 | atomic_set(&cmd->t_task->transport_lun_stop, 0); | |
c66ac9db | 5226 | DEBUG_TRANSPORT_S("ConfigFS ITT[0x%08x] - t_transport_stop ==" |
e3d6f909 AG |
5227 | " TRUE, skipping\n", cmd->se_tfo->get_task_tag(cmd)); |
5228 | spin_unlock_irqrestore(&cmd->t_task->t_state_lock, flags); | |
c66ac9db | 5229 | transport_cmd_check_stop(cmd, 1, 0); |
e3d6f909 | 5230 | return -EPERM; |
c66ac9db | 5231 | } |
e3d6f909 AG |
5232 | atomic_set(&cmd->t_task->transport_lun_fe_stop, 1); |
5233 | spin_unlock_irqrestore(&cmd->t_task->t_state_lock, flags); | |
c66ac9db | 5234 | |
e3d6f909 | 5235 | wake_up_interruptible(&cmd->se_lun->lun_se_dev->dev_queue_obj.thread_wq); |
c66ac9db NB |
5236 | |
5237 | ret = transport_stop_tasks_for_cmd(cmd); | |
5238 | ||
5239 | DEBUG_TRANSPORT_S("ConfigFS: cmd: %p t_task_cdbs: %d stop tasks ret:" | |
e3d6f909 | 5240 | " %d\n", cmd, cmd->t_task->t_task_cdbs, ret); |
c66ac9db NB |
5241 | if (!ret) { |
5242 | DEBUG_TRANSPORT_S("ConfigFS: ITT[0x%08x] - stopping cmd....\n", | |
e3d6f909 AG |
5243 | cmd->se_tfo->get_task_tag(cmd)); |
5244 | wait_for_completion(&cmd->t_task->transport_lun_stop_comp); | |
c66ac9db | 5245 | DEBUG_TRANSPORT_S("ConfigFS: ITT[0x%08x] - stopped cmd....\n", |
e3d6f909 | 5246 | cmd->se_tfo->get_task_tag(cmd)); |
c66ac9db | 5247 | } |
e3d6f909 | 5248 | transport_remove_cmd_from_queue(cmd, &cmd->se_lun->lun_se_dev->dev_queue_obj); |
c66ac9db NB |
5249 | |
5250 | return 0; | |
5251 | } | |
5252 | ||
5253 | /* #define DEBUG_CLEAR_LUN */ | |
5254 | #ifdef DEBUG_CLEAR_LUN | |
5255 | #define DEBUG_CLEAR_L(x...) printk(KERN_INFO x) | |
5256 | #else | |
5257 | #define DEBUG_CLEAR_L(x...) | |
5258 | #endif | |
5259 | ||
5260 | static void __transport_clear_lun_from_sessions(struct se_lun *lun) | |
5261 | { | |
5262 | struct se_cmd *cmd = NULL; | |
5263 | unsigned long lun_flags, cmd_flags; | |
5264 | /* | |
5265 | * Do exception processing and return CHECK_CONDITION status to the | |
5266 | * Initiator Port. | |
5267 | */ | |
5268 | spin_lock_irqsave(&lun->lun_cmd_lock, lun_flags); | |
5269 | while (!list_empty_careful(&lun->lun_cmd_list)) { | |
5270 | cmd = list_entry(lun->lun_cmd_list.next, | |
5271 | struct se_cmd, se_lun_list); | |
5272 | list_del(&cmd->se_lun_list); | |
5273 | ||
e3d6f909 AG |
5274 | if (!(cmd->t_task)) { |
5275 | printk(KERN_ERR "ITT: 0x%08x, cmd->t_task = NULL" | |
c66ac9db | 5276 | "[i,t]_state: %u/%u\n", |
e3d6f909 AG |
5277 | cmd->se_tfo->get_task_tag(cmd), |
5278 | cmd->se_tfo->get_cmd_state(cmd), cmd->t_state); | |
c66ac9db NB |
5279 | BUG(); |
5280 | } | |
e3d6f909 | 5281 | atomic_set(&cmd->t_task->transport_lun_active, 0); |
c66ac9db NB |
5282 | /* |
5283 | * This will notify iscsi_target_transport.c: | |
5284 | * transport_cmd_check_stop() that a LUN shutdown is in | |
5285 | * progress for the iscsi_cmd_t. | |
5286 | */ | |
e3d6f909 AG |
5287 | spin_lock(&cmd->t_task->t_state_lock); |
5288 | DEBUG_CLEAR_L("SE_LUN[%d] - Setting cmd->t_task->transport" | |
c66ac9db | 5289 | "_lun_stop for ITT: 0x%08x\n", |
e3d6f909 AG |
5290 | cmd->se_lun->unpacked_lun, |
5291 | cmd->se_tfo->get_task_tag(cmd)); | |
5292 | atomic_set(&cmd->t_task->transport_lun_stop, 1); | |
5293 | spin_unlock(&cmd->t_task->t_state_lock); | |
c66ac9db NB |
5294 | |
5295 | spin_unlock_irqrestore(&lun->lun_cmd_lock, lun_flags); | |
5296 | ||
e3d6f909 | 5297 | if (!(cmd->se_lun)) { |
c66ac9db | 5298 | printk(KERN_ERR "ITT: 0x%08x, [i,t]_state: %u/%u\n", |
e3d6f909 AG |
5299 | cmd->se_tfo->get_task_tag(cmd), |
5300 | cmd->se_tfo->get_cmd_state(cmd), cmd->t_state); | |
c66ac9db NB |
5301 | BUG(); |
5302 | } | |
5303 | /* | |
5304 | * If the Storage engine still owns the iscsi_cmd_t, determine | |
5305 | * and/or stop its context. | |
5306 | */ | |
5307 | DEBUG_CLEAR_L("SE_LUN[%d] - ITT: 0x%08x before transport" | |
e3d6f909 AG |
5308 | "_lun_wait_for_tasks()\n", cmd->se_lun->unpacked_lun, |
5309 | cmd->se_tfo->get_task_tag(cmd)); | |
c66ac9db | 5310 | |
e3d6f909 | 5311 | if (transport_lun_wait_for_tasks(cmd, cmd->se_lun) < 0) { |
c66ac9db NB |
5312 | spin_lock_irqsave(&lun->lun_cmd_lock, lun_flags); |
5313 | continue; | |
5314 | } | |
5315 | ||
5316 | DEBUG_CLEAR_L("SE_LUN[%d] - ITT: 0x%08x after transport_lun" | |
5317 | "_wait_for_tasks(): SUCCESS\n", | |
e3d6f909 AG |
5318 | cmd->se_lun->unpacked_lun, |
5319 | cmd->se_tfo->get_task_tag(cmd)); | |
c66ac9db | 5320 | |
e3d6f909 AG |
5321 | spin_lock_irqsave(&cmd->t_task->t_state_lock, cmd_flags); |
5322 | if (!(atomic_read(&cmd->t_task->transport_dev_active))) { | |
5323 | spin_unlock_irqrestore(&cmd->t_task->t_state_lock, cmd_flags); | |
c66ac9db NB |
5324 | goto check_cond; |
5325 | } | |
e3d6f909 | 5326 | atomic_set(&cmd->t_task->transport_dev_active, 0); |
c66ac9db | 5327 | transport_all_task_dev_remove_state(cmd); |
e3d6f909 | 5328 | spin_unlock_irqrestore(&cmd->t_task->t_state_lock, cmd_flags); |
c66ac9db NB |
5329 | |
5330 | transport_free_dev_tasks(cmd); | |
5331 | /* | |
5332 | * The Storage engine stopped this struct se_cmd before it was | |
5333 | * send to the fabric frontend for delivery back to the | |
5334 | * Initiator Node. Return this SCSI CDB back with an | |
5335 | * CHECK_CONDITION status. | |
5336 | */ | |
5337 | check_cond: | |
5338 | transport_send_check_condition_and_sense(cmd, | |
5339 | TCM_NON_EXISTENT_LUN, 0); | |
5340 | /* | |
5341 | * If the fabric frontend is waiting for this iscsi_cmd_t to | |
5342 | * be released, notify the waiting thread now that LU has | |
5343 | * finished accessing it. | |
5344 | */ | |
e3d6f909 AG |
5345 | spin_lock_irqsave(&cmd->t_task->t_state_lock, cmd_flags); |
5346 | if (atomic_read(&cmd->t_task->transport_lun_fe_stop)) { | |
c66ac9db NB |
5347 | DEBUG_CLEAR_L("SE_LUN[%d] - Detected FE stop for" |
5348 | " struct se_cmd: %p ITT: 0x%08x\n", | |
5349 | lun->unpacked_lun, | |
e3d6f909 | 5350 | cmd, cmd->se_tfo->get_task_tag(cmd)); |
c66ac9db | 5351 | |
e3d6f909 | 5352 | spin_unlock_irqrestore(&cmd->t_task->t_state_lock, |
c66ac9db NB |
5353 | cmd_flags); |
5354 | transport_cmd_check_stop(cmd, 1, 0); | |
e3d6f909 | 5355 | complete(&cmd->t_task->transport_lun_fe_stop_comp); |
c66ac9db NB |
5356 | spin_lock_irqsave(&lun->lun_cmd_lock, lun_flags); |
5357 | continue; | |
5358 | } | |
5359 | DEBUG_CLEAR_L("SE_LUN[%d] - ITT: 0x%08x finished processing\n", | |
e3d6f909 | 5360 | lun->unpacked_lun, cmd->se_tfo->get_task_tag(cmd)); |
c66ac9db | 5361 | |
e3d6f909 | 5362 | spin_unlock_irqrestore(&cmd->t_task->t_state_lock, cmd_flags); |
c66ac9db NB |
5363 | spin_lock_irqsave(&lun->lun_cmd_lock, lun_flags); |
5364 | } | |
5365 | spin_unlock_irqrestore(&lun->lun_cmd_lock, lun_flags); | |
5366 | } | |
5367 | ||
5368 | static int transport_clear_lun_thread(void *p) | |
5369 | { | |
5370 | struct se_lun *lun = (struct se_lun *)p; | |
5371 | ||
5372 | __transport_clear_lun_from_sessions(lun); | |
5373 | complete(&lun->lun_shutdown_comp); | |
5374 | ||
5375 | return 0; | |
5376 | } | |
5377 | ||
5378 | int transport_clear_lun_from_sessions(struct se_lun *lun) | |
5379 | { | |
5380 | struct task_struct *kt; | |
5381 | ||
5382 | kt = kthread_run(transport_clear_lun_thread, (void *)lun, | |
5383 | "tcm_cl_%u", lun->unpacked_lun); | |
5384 | if (IS_ERR(kt)) { | |
5385 | printk(KERN_ERR "Unable to start clear_lun thread\n"); | |
e3d6f909 | 5386 | return PTR_ERR(kt); |
c66ac9db NB |
5387 | } |
5388 | wait_for_completion(&lun->lun_shutdown_comp); | |
5389 | ||
5390 | return 0; | |
5391 | } | |
5392 | ||
5393 | /* transport_generic_wait_for_tasks(): | |
5394 | * | |
5395 | * Called from frontend or passthrough context to wait for storage engine | |
5396 | * to pause and/or release frontend generated struct se_cmd. | |
5397 | */ | |
5398 | static void transport_generic_wait_for_tasks( | |
5399 | struct se_cmd *cmd, | |
5400 | int remove_cmd, | |
5401 | int session_reinstatement) | |
5402 | { | |
5403 | unsigned long flags; | |
5404 | ||
5405 | if (!(cmd->se_cmd_flags & SCF_SE_LUN_CMD) && !(cmd->se_tmr_req)) | |
5406 | return; | |
5407 | ||
e3d6f909 | 5408 | spin_lock_irqsave(&cmd->t_task->t_state_lock, flags); |
c66ac9db NB |
5409 | /* |
5410 | * If we are already stopped due to an external event (ie: LUN shutdown) | |
5411 | * sleep until the connection can have the passed struct se_cmd back. | |
e3d6f909 | 5412 | * The cmd->t_task->transport_lun_stopped_sem will be upped by |
c66ac9db NB |
5413 | * transport_clear_lun_from_sessions() once the ConfigFS context caller |
5414 | * has completed its operation on the struct se_cmd. | |
5415 | */ | |
e3d6f909 | 5416 | if (atomic_read(&cmd->t_task->transport_lun_stop)) { |
c66ac9db NB |
5417 | |
5418 | DEBUG_TRANSPORT_S("wait_for_tasks: Stopping" | |
e3d6f909 | 5419 | " wait_for_completion(&cmd->t_tasktransport_lun_fe" |
c66ac9db | 5420 | "_stop_comp); for ITT: 0x%08x\n", |
e3d6f909 | 5421 | cmd->se_tfo->get_task_tag(cmd)); |
c66ac9db NB |
5422 | /* |
5423 | * There is a special case for WRITES where a FE exception + | |
5424 | * LUN shutdown means ConfigFS context is still sleeping on | |
5425 | * transport_lun_stop_comp in transport_lun_wait_for_tasks(). | |
5426 | * We go ahead and up transport_lun_stop_comp just to be sure | |
5427 | * here. | |
5428 | */ | |
e3d6f909 AG |
5429 | spin_unlock_irqrestore(&cmd->t_task->t_state_lock, flags); |
5430 | complete(&cmd->t_task->transport_lun_stop_comp); | |
5431 | wait_for_completion(&cmd->t_task->transport_lun_fe_stop_comp); | |
5432 | spin_lock_irqsave(&cmd->t_task->t_state_lock, flags); | |
c66ac9db NB |
5433 | |
5434 | transport_all_task_dev_remove_state(cmd); | |
5435 | /* | |
5436 | * At this point, the frontend who was the originator of this | |
5437 | * struct se_cmd, now owns the structure and can be released through | |
5438 | * normal means below. | |
5439 | */ | |
5440 | DEBUG_TRANSPORT_S("wait_for_tasks: Stopped" | |
e3d6f909 | 5441 | " wait_for_completion(&cmd->t_tasktransport_lun_fe_" |
c66ac9db | 5442 | "stop_comp); for ITT: 0x%08x\n", |
e3d6f909 | 5443 | cmd->se_tfo->get_task_tag(cmd)); |
c66ac9db | 5444 | |
e3d6f909 | 5445 | atomic_set(&cmd->t_task->transport_lun_stop, 0); |
c66ac9db | 5446 | } |
e3d6f909 AG |
5447 | if (!atomic_read(&cmd->t_task->t_transport_active) || |
5448 | atomic_read(&cmd->t_task->t_transport_aborted)) | |
c66ac9db NB |
5449 | goto remove; |
5450 | ||
e3d6f909 | 5451 | atomic_set(&cmd->t_task->t_transport_stop, 1); |
c66ac9db NB |
5452 | |
5453 | DEBUG_TRANSPORT_S("wait_for_tasks: Stopping %p ITT: 0x%08x" | |
5454 | " i_state: %d, t_state/def_t_state: %d/%d, t_transport_stop" | |
e3d6f909 AG |
5455 | " = TRUE\n", cmd, cmd->se_tfo->get_task_tag(cmd), |
5456 | cmd->se_tfo->get_cmd_state(cmd), cmd->t_state, | |
c66ac9db NB |
5457 | cmd->deferred_t_state); |
5458 | ||
e3d6f909 | 5459 | spin_unlock_irqrestore(&cmd->t_task->t_state_lock, flags); |
c66ac9db | 5460 | |
e3d6f909 | 5461 | wake_up_interruptible(&cmd->se_lun->lun_se_dev->dev_queue_obj.thread_wq); |
c66ac9db | 5462 | |
e3d6f909 | 5463 | wait_for_completion(&cmd->t_task->t_transport_stop_comp); |
c66ac9db | 5464 | |
e3d6f909 AG |
5465 | spin_lock_irqsave(&cmd->t_task->t_state_lock, flags); |
5466 | atomic_set(&cmd->t_task->t_transport_active, 0); | |
5467 | atomic_set(&cmd->t_task->t_transport_stop, 0); | |
c66ac9db NB |
5468 | |
5469 | DEBUG_TRANSPORT_S("wait_for_tasks: Stopped wait_for_compltion(" | |
e3d6f909 AG |
5470 | "&cmd->t_task->t_transport_stop_comp) for ITT: 0x%08x\n", |
5471 | cmd->se_tfo->get_task_tag(cmd)); | |
c66ac9db | 5472 | remove: |
e3d6f909 | 5473 | spin_unlock_irqrestore(&cmd->t_task->t_state_lock, flags); |
c66ac9db NB |
5474 | if (!remove_cmd) |
5475 | return; | |
5476 | ||
5477 | transport_generic_free_cmd(cmd, 0, 0, session_reinstatement); | |
5478 | } | |
5479 | ||
5480 | static int transport_get_sense_codes( | |
5481 | struct se_cmd *cmd, | |
5482 | u8 *asc, | |
5483 | u8 *ascq) | |
5484 | { | |
5485 | *asc = cmd->scsi_asc; | |
5486 | *ascq = cmd->scsi_ascq; | |
5487 | ||
5488 | return 0; | |
5489 | } | |
5490 | ||
5491 | static int transport_set_sense_codes( | |
5492 | struct se_cmd *cmd, | |
5493 | u8 asc, | |
5494 | u8 ascq) | |
5495 | { | |
5496 | cmd->scsi_asc = asc; | |
5497 | cmd->scsi_ascq = ascq; | |
5498 | ||
5499 | return 0; | |
5500 | } | |
5501 | ||
5502 | int transport_send_check_condition_and_sense( | |
5503 | struct se_cmd *cmd, | |
5504 | u8 reason, | |
5505 | int from_transport) | |
5506 | { | |
5507 | unsigned char *buffer = cmd->sense_buffer; | |
5508 | unsigned long flags; | |
5509 | int offset; | |
5510 | u8 asc = 0, ascq = 0; | |
5511 | ||
e3d6f909 | 5512 | spin_lock_irqsave(&cmd->t_task->t_state_lock, flags); |
c66ac9db | 5513 | if (cmd->se_cmd_flags & SCF_SENT_CHECK_CONDITION) { |
e3d6f909 | 5514 | spin_unlock_irqrestore(&cmd->t_task->t_state_lock, flags); |
c66ac9db NB |
5515 | return 0; |
5516 | } | |
5517 | cmd->se_cmd_flags |= SCF_SENT_CHECK_CONDITION; | |
e3d6f909 | 5518 | spin_unlock_irqrestore(&cmd->t_task->t_state_lock, flags); |
c66ac9db NB |
5519 | |
5520 | if (!reason && from_transport) | |
5521 | goto after_reason; | |
5522 | ||
5523 | if (!from_transport) | |
5524 | cmd->se_cmd_flags |= SCF_EMULATED_TASK_SENSE; | |
5525 | /* | |
5526 | * Data Segment and SenseLength of the fabric response PDU. | |
5527 | * | |
5528 | * TRANSPORT_SENSE_BUFFER is now set to SCSI_SENSE_BUFFERSIZE | |
5529 | * from include/scsi/scsi_cmnd.h | |
5530 | */ | |
e3d6f909 | 5531 | offset = cmd->se_tfo->set_fabric_sense_len(cmd, |
c66ac9db NB |
5532 | TRANSPORT_SENSE_BUFFER); |
5533 | /* | |
5534 | * Actual SENSE DATA, see SPC-3 7.23.2 SPC_SENSE_KEY_OFFSET uses | |
5535 | * SENSE KEY values from include/scsi/scsi.h | |
5536 | */ | |
5537 | switch (reason) { | |
5538 | case TCM_NON_EXISTENT_LUN: | |
5539 | case TCM_UNSUPPORTED_SCSI_OPCODE: | |
5540 | case TCM_SECTOR_COUNT_TOO_MANY: | |
5541 | /* CURRENT ERROR */ | |
5542 | buffer[offset] = 0x70; | |
5543 | /* ILLEGAL REQUEST */ | |
5544 | buffer[offset+SPC_SENSE_KEY_OFFSET] = ILLEGAL_REQUEST; | |
5545 | /* INVALID COMMAND OPERATION CODE */ | |
5546 | buffer[offset+SPC_ASC_KEY_OFFSET] = 0x20; | |
5547 | break; | |
5548 | case TCM_UNKNOWN_MODE_PAGE: | |
5549 | /* CURRENT ERROR */ | |
5550 | buffer[offset] = 0x70; | |
5551 | /* ILLEGAL REQUEST */ | |
5552 | buffer[offset+SPC_SENSE_KEY_OFFSET] = ILLEGAL_REQUEST; | |
5553 | /* INVALID FIELD IN CDB */ | |
5554 | buffer[offset+SPC_ASC_KEY_OFFSET] = 0x24; | |
5555 | break; | |
5556 | case TCM_CHECK_CONDITION_ABORT_CMD: | |
5557 | /* CURRENT ERROR */ | |
5558 | buffer[offset] = 0x70; | |
5559 | /* ABORTED COMMAND */ | |
5560 | buffer[offset+SPC_SENSE_KEY_OFFSET] = ABORTED_COMMAND; | |
5561 | /* BUS DEVICE RESET FUNCTION OCCURRED */ | |
5562 | buffer[offset+SPC_ASC_KEY_OFFSET] = 0x29; | |
5563 | buffer[offset+SPC_ASCQ_KEY_OFFSET] = 0x03; | |
5564 | break; | |
5565 | case TCM_INCORRECT_AMOUNT_OF_DATA: | |
5566 | /* CURRENT ERROR */ | |
5567 | buffer[offset] = 0x70; | |
5568 | /* ABORTED COMMAND */ | |
5569 | buffer[offset+SPC_SENSE_KEY_OFFSET] = ABORTED_COMMAND; | |
5570 | /* WRITE ERROR */ | |
5571 | buffer[offset+SPC_ASC_KEY_OFFSET] = 0x0c; | |
5572 | /* NOT ENOUGH UNSOLICITED DATA */ | |
5573 | buffer[offset+SPC_ASCQ_KEY_OFFSET] = 0x0d; | |
5574 | break; | |
5575 | case TCM_INVALID_CDB_FIELD: | |
5576 | /* CURRENT ERROR */ | |
5577 | buffer[offset] = 0x70; | |
5578 | /* ABORTED COMMAND */ | |
5579 | buffer[offset+SPC_SENSE_KEY_OFFSET] = ABORTED_COMMAND; | |
5580 | /* INVALID FIELD IN CDB */ | |
5581 | buffer[offset+SPC_ASC_KEY_OFFSET] = 0x24; | |
5582 | break; | |
5583 | case TCM_INVALID_PARAMETER_LIST: | |
5584 | /* CURRENT ERROR */ | |
5585 | buffer[offset] = 0x70; | |
5586 | /* ABORTED COMMAND */ | |
5587 | buffer[offset+SPC_SENSE_KEY_OFFSET] = ABORTED_COMMAND; | |
5588 | /* INVALID FIELD IN PARAMETER LIST */ | |
5589 | buffer[offset+SPC_ASC_KEY_OFFSET] = 0x26; | |
5590 | break; | |
5591 | case TCM_UNEXPECTED_UNSOLICITED_DATA: | |
5592 | /* CURRENT ERROR */ | |
5593 | buffer[offset] = 0x70; | |
5594 | /* ABORTED COMMAND */ | |
5595 | buffer[offset+SPC_SENSE_KEY_OFFSET] = ABORTED_COMMAND; | |
5596 | /* WRITE ERROR */ | |
5597 | buffer[offset+SPC_ASC_KEY_OFFSET] = 0x0c; | |
5598 | /* UNEXPECTED_UNSOLICITED_DATA */ | |
5599 | buffer[offset+SPC_ASCQ_KEY_OFFSET] = 0x0c; | |
5600 | break; | |
5601 | case TCM_SERVICE_CRC_ERROR: | |
5602 | /* CURRENT ERROR */ | |
5603 | buffer[offset] = 0x70; | |
5604 | /* ABORTED COMMAND */ | |
5605 | buffer[offset+SPC_SENSE_KEY_OFFSET] = ABORTED_COMMAND; | |
5606 | /* PROTOCOL SERVICE CRC ERROR */ | |
5607 | buffer[offset+SPC_ASC_KEY_OFFSET] = 0x47; | |
5608 | /* N/A */ | |
5609 | buffer[offset+SPC_ASCQ_KEY_OFFSET] = 0x05; | |
5610 | break; | |
5611 | case TCM_SNACK_REJECTED: | |
5612 | /* CURRENT ERROR */ | |
5613 | buffer[offset] = 0x70; | |
5614 | /* ABORTED COMMAND */ | |
5615 | buffer[offset+SPC_SENSE_KEY_OFFSET] = ABORTED_COMMAND; | |
5616 | /* READ ERROR */ | |
5617 | buffer[offset+SPC_ASC_KEY_OFFSET] = 0x11; | |
5618 | /* FAILED RETRANSMISSION REQUEST */ | |
5619 | buffer[offset+SPC_ASCQ_KEY_OFFSET] = 0x13; | |
5620 | break; | |
5621 | case TCM_WRITE_PROTECTED: | |
5622 | /* CURRENT ERROR */ | |
5623 | buffer[offset] = 0x70; | |
5624 | /* DATA PROTECT */ | |
5625 | buffer[offset+SPC_SENSE_KEY_OFFSET] = DATA_PROTECT; | |
5626 | /* WRITE PROTECTED */ | |
5627 | buffer[offset+SPC_ASC_KEY_OFFSET] = 0x27; | |
5628 | break; | |
5629 | case TCM_CHECK_CONDITION_UNIT_ATTENTION: | |
5630 | /* CURRENT ERROR */ | |
5631 | buffer[offset] = 0x70; | |
5632 | /* UNIT ATTENTION */ | |
5633 | buffer[offset+SPC_SENSE_KEY_OFFSET] = UNIT_ATTENTION; | |
5634 | core_scsi3_ua_for_check_condition(cmd, &asc, &ascq); | |
5635 | buffer[offset+SPC_ASC_KEY_OFFSET] = asc; | |
5636 | buffer[offset+SPC_ASCQ_KEY_OFFSET] = ascq; | |
5637 | break; | |
5638 | case TCM_CHECK_CONDITION_NOT_READY: | |
5639 | /* CURRENT ERROR */ | |
5640 | buffer[offset] = 0x70; | |
5641 | /* Not Ready */ | |
5642 | buffer[offset+SPC_SENSE_KEY_OFFSET] = NOT_READY; | |
5643 | transport_get_sense_codes(cmd, &asc, &ascq); | |
5644 | buffer[offset+SPC_ASC_KEY_OFFSET] = asc; | |
5645 | buffer[offset+SPC_ASCQ_KEY_OFFSET] = ascq; | |
5646 | break; | |
5647 | case TCM_LOGICAL_UNIT_COMMUNICATION_FAILURE: | |
5648 | default: | |
5649 | /* CURRENT ERROR */ | |
5650 | buffer[offset] = 0x70; | |
5651 | /* ILLEGAL REQUEST */ | |
5652 | buffer[offset+SPC_SENSE_KEY_OFFSET] = ILLEGAL_REQUEST; | |
5653 | /* LOGICAL UNIT COMMUNICATION FAILURE */ | |
5654 | buffer[offset+SPC_ASC_KEY_OFFSET] = 0x80; | |
5655 | break; | |
5656 | } | |
5657 | /* | |
5658 | * This code uses linux/include/scsi/scsi.h SAM status codes! | |
5659 | */ | |
5660 | cmd->scsi_status = SAM_STAT_CHECK_CONDITION; | |
5661 | /* | |
5662 | * Automatically padded, this value is encoded in the fabric's | |
5663 | * data_length response PDU containing the SCSI defined sense data. | |
5664 | */ | |
5665 | cmd->scsi_sense_length = TRANSPORT_SENSE_BUFFER + offset; | |
5666 | ||
5667 | after_reason: | |
e3d6f909 | 5668 | cmd->se_tfo->queue_status(cmd); |
c66ac9db NB |
5669 | return 0; |
5670 | } | |
5671 | EXPORT_SYMBOL(transport_send_check_condition_and_sense); | |
5672 | ||
5673 | int transport_check_aborted_status(struct se_cmd *cmd, int send_status) | |
5674 | { | |
5675 | int ret = 0; | |
5676 | ||
e3d6f909 | 5677 | if (atomic_read(&cmd->t_task->t_transport_aborted) != 0) { |
c66ac9db NB |
5678 | if (!(send_status) || |
5679 | (cmd->se_cmd_flags & SCF_SENT_DELAYED_TAS)) | |
5680 | return 1; | |
5681 | #if 0 | |
5682 | printk(KERN_INFO "Sending delayed SAM_STAT_TASK_ABORTED" | |
5683 | " status for CDB: 0x%02x ITT: 0x%08x\n", | |
e3d6f909 AG |
5684 | cmd->t_task->t_task_cdb[0], |
5685 | cmd->se_tfo->get_task_tag(cmd)); | |
c66ac9db NB |
5686 | #endif |
5687 | cmd->se_cmd_flags |= SCF_SENT_DELAYED_TAS; | |
e3d6f909 | 5688 | cmd->se_tfo->queue_status(cmd); |
c66ac9db NB |
5689 | ret = 1; |
5690 | } | |
5691 | return ret; | |
5692 | } | |
5693 | EXPORT_SYMBOL(transport_check_aborted_status); | |
5694 | ||
5695 | void transport_send_task_abort(struct se_cmd *cmd) | |
5696 | { | |
5697 | /* | |
5698 | * If there are still expected incoming fabric WRITEs, we wait | |
5699 | * until until they have completed before sending a TASK_ABORTED | |
5700 | * response. This response with TASK_ABORTED status will be | |
5701 | * queued back to fabric module by transport_check_aborted_status(). | |
5702 | */ | |
5703 | if (cmd->data_direction == DMA_TO_DEVICE) { | |
e3d6f909 AG |
5704 | if (cmd->se_tfo->write_pending_status(cmd) != 0) { |
5705 | atomic_inc(&cmd->t_task->t_transport_aborted); | |
c66ac9db NB |
5706 | smp_mb__after_atomic_inc(); |
5707 | cmd->scsi_status = SAM_STAT_TASK_ABORTED; | |
5708 | transport_new_cmd_failure(cmd); | |
5709 | return; | |
5710 | } | |
5711 | } | |
5712 | cmd->scsi_status = SAM_STAT_TASK_ABORTED; | |
5713 | #if 0 | |
5714 | printk(KERN_INFO "Setting SAM_STAT_TASK_ABORTED status for CDB: 0x%02x," | |
e3d6f909 AG |
5715 | " ITT: 0x%08x\n", cmd->t_task->t_task_cdb[0], |
5716 | cmd->se_tfo->get_task_tag(cmd)); | |
c66ac9db | 5717 | #endif |
e3d6f909 | 5718 | cmd->se_tfo->queue_status(cmd); |
c66ac9db NB |
5719 | } |
5720 | ||
5721 | /* transport_generic_do_tmr(): | |
5722 | * | |
5723 | * | |
5724 | */ | |
5725 | int transport_generic_do_tmr(struct se_cmd *cmd) | |
5726 | { | |
5727 | struct se_cmd *ref_cmd; | |
e3d6f909 | 5728 | struct se_device *dev = cmd->se_lun->lun_se_dev; |
c66ac9db NB |
5729 | struct se_tmr_req *tmr = cmd->se_tmr_req; |
5730 | int ret; | |
5731 | ||
5732 | switch (tmr->function) { | |
5c6cd613 | 5733 | case TMR_ABORT_TASK: |
c66ac9db NB |
5734 | ref_cmd = tmr->ref_cmd; |
5735 | tmr->response = TMR_FUNCTION_REJECTED; | |
5736 | break; | |
5c6cd613 NB |
5737 | case TMR_ABORT_TASK_SET: |
5738 | case TMR_CLEAR_ACA: | |
5739 | case TMR_CLEAR_TASK_SET: | |
c66ac9db NB |
5740 | tmr->response = TMR_TASK_MGMT_FUNCTION_NOT_SUPPORTED; |
5741 | break; | |
5c6cd613 | 5742 | case TMR_LUN_RESET: |
c66ac9db NB |
5743 | ret = core_tmr_lun_reset(dev, tmr, NULL, NULL); |
5744 | tmr->response = (!ret) ? TMR_FUNCTION_COMPLETE : | |
5745 | TMR_FUNCTION_REJECTED; | |
5746 | break; | |
5c6cd613 | 5747 | case TMR_TARGET_WARM_RESET: |
c66ac9db NB |
5748 | tmr->response = TMR_FUNCTION_REJECTED; |
5749 | break; | |
5c6cd613 | 5750 | case TMR_TARGET_COLD_RESET: |
c66ac9db NB |
5751 | tmr->response = TMR_FUNCTION_REJECTED; |
5752 | break; | |
c66ac9db NB |
5753 | default: |
5754 | printk(KERN_ERR "Uknown TMR function: 0x%02x.\n", | |
5755 | tmr->function); | |
5756 | tmr->response = TMR_FUNCTION_REJECTED; | |
5757 | break; | |
5758 | } | |
5759 | ||
5760 | cmd->t_state = TRANSPORT_ISTATE_PROCESSING; | |
e3d6f909 | 5761 | cmd->se_tfo->queue_tm_rsp(cmd); |
c66ac9db NB |
5762 | |
5763 | transport_cmd_check_stop(cmd, 2, 0); | |
5764 | return 0; | |
5765 | } | |
5766 | ||
5767 | /* | |
5768 | * Called with spin_lock_irq(&dev->execute_task_lock); held | |
5769 | * | |
5770 | */ | |
5771 | static struct se_task * | |
5772 | transport_get_task_from_state_list(struct se_device *dev) | |
5773 | { | |
5774 | struct se_task *task; | |
5775 | ||
5776 | if (list_empty(&dev->state_task_list)) | |
5777 | return NULL; | |
5778 | ||
5779 | list_for_each_entry(task, &dev->state_task_list, t_state_list) | |
5780 | break; | |
5781 | ||
5782 | list_del(&task->t_state_list); | |
5783 | atomic_set(&task->task_state_active, 0); | |
5784 | ||
5785 | return task; | |
5786 | } | |
5787 | ||
5788 | static void transport_processing_shutdown(struct se_device *dev) | |
5789 | { | |
5790 | struct se_cmd *cmd; | |
5791 | struct se_queue_req *qr; | |
5792 | struct se_task *task; | |
5793 | u8 state; | |
5794 | unsigned long flags; | |
5795 | /* | |
5796 | * Empty the struct se_device's struct se_task state list. | |
5797 | */ | |
5798 | spin_lock_irqsave(&dev->execute_task_lock, flags); | |
5799 | while ((task = transport_get_task_from_state_list(dev))) { | |
e3d6f909 AG |
5800 | if (!task->task_se_cmd) { |
5801 | printk(KERN_ERR "task->task_se_cmd is NULL!\n"); | |
c66ac9db NB |
5802 | continue; |
5803 | } | |
e3d6f909 | 5804 | cmd = task->task_se_cmd; |
c66ac9db | 5805 | |
e3d6f909 AG |
5806 | if (!cmd->t_task) { |
5807 | printk(KERN_ERR "cmd->t_task is NULL for task: %p cmd:" | |
c66ac9db | 5808 | " %p ITT: 0x%08x\n", task, cmd, |
e3d6f909 | 5809 | cmd->se_tfo->get_task_tag(cmd)); |
c66ac9db NB |
5810 | continue; |
5811 | } | |
5812 | spin_unlock_irqrestore(&dev->execute_task_lock, flags); | |
5813 | ||
e3d6f909 | 5814 | spin_lock_irqsave(&cmd->t_task->t_state_lock, flags); |
c66ac9db NB |
5815 | |
5816 | DEBUG_DO("PT: cmd: %p task: %p ITT/CmdSN: 0x%08x/0x%08x," | |
5817 | " i_state/def_i_state: %d/%d, t_state/def_t_state:" | |
5818 | " %d/%d cdb: 0x%02x\n", cmd, task, | |
e3d6f909 AG |
5819 | cmd->se_tfo->get_task_tag(cmd), cmd->cmd_sn, |
5820 | cmd->se_tfo->get_cmd_state(cmd), cmd->deferred_i_state, | |
c66ac9db | 5821 | cmd->t_state, cmd->deferred_t_state, |
e3d6f909 | 5822 | cmd->t_task->t_task_cdb[0]); |
c66ac9db NB |
5823 | DEBUG_DO("PT: ITT[0x%08x] - t_task_cdbs: %d t_task_cdbs_left:" |
5824 | " %d t_task_cdbs_sent: %d -- t_transport_active: %d" | |
5825 | " t_transport_stop: %d t_transport_sent: %d\n", | |
e3d6f909 AG |
5826 | cmd->se_tfo->get_task_tag(cmd), |
5827 | cmd->t_task->t_task_cdbs, | |
5828 | atomic_read(&cmd->t_task->t_task_cdbs_left), | |
5829 | atomic_read(&cmd->t_task->t_task_cdbs_sent), | |
5830 | atomic_read(&cmd->t_task->t_transport_active), | |
5831 | atomic_read(&cmd->t_task->t_transport_stop), | |
5832 | atomic_read(&cmd->t_task->t_transport_sent)); | |
c66ac9db NB |
5833 | |
5834 | if (atomic_read(&task->task_active)) { | |
5835 | atomic_set(&task->task_stop, 1); | |
5836 | spin_unlock_irqrestore( | |
e3d6f909 | 5837 | &cmd->t_task->t_state_lock, flags); |
c66ac9db NB |
5838 | |
5839 | DEBUG_DO("Waiting for task: %p to shutdown for dev:" | |
5840 | " %p\n", task, dev); | |
5841 | wait_for_completion(&task->task_stop_comp); | |
5842 | DEBUG_DO("Completed task: %p shutdown for dev: %p\n", | |
5843 | task, dev); | |
5844 | ||
e3d6f909 AG |
5845 | spin_lock_irqsave(&cmd->t_task->t_state_lock, flags); |
5846 | atomic_dec(&cmd->t_task->t_task_cdbs_left); | |
c66ac9db NB |
5847 | |
5848 | atomic_set(&task->task_active, 0); | |
5849 | atomic_set(&task->task_stop, 0); | |
52208ae3 NB |
5850 | } else { |
5851 | if (atomic_read(&task->task_execute_queue) != 0) | |
5852 | transport_remove_task_from_execute_queue(task, dev); | |
c66ac9db NB |
5853 | } |
5854 | __transport_stop_task_timer(task, &flags); | |
5855 | ||
e3d6f909 | 5856 | if (!(atomic_dec_and_test(&cmd->t_task->t_task_cdbs_ex_left))) { |
c66ac9db | 5857 | spin_unlock_irqrestore( |
e3d6f909 | 5858 | &cmd->t_task->t_state_lock, flags); |
c66ac9db NB |
5859 | |
5860 | DEBUG_DO("Skipping task: %p, dev: %p for" | |
5861 | " t_task_cdbs_ex_left: %d\n", task, dev, | |
e3d6f909 | 5862 | atomic_read(&cmd->t_task->t_task_cdbs_ex_left)); |
c66ac9db NB |
5863 | |
5864 | spin_lock_irqsave(&dev->execute_task_lock, flags); | |
5865 | continue; | |
5866 | } | |
5867 | ||
e3d6f909 | 5868 | if (atomic_read(&cmd->t_task->t_transport_active)) { |
c66ac9db NB |
5869 | DEBUG_DO("got t_transport_active = 1 for task: %p, dev:" |
5870 | " %p\n", task, dev); | |
5871 | ||
e3d6f909 | 5872 | if (atomic_read(&cmd->t_task->t_fe_count)) { |
c66ac9db | 5873 | spin_unlock_irqrestore( |
e3d6f909 | 5874 | &cmd->t_task->t_state_lock, flags); |
c66ac9db NB |
5875 | transport_send_check_condition_and_sense( |
5876 | cmd, TCM_LOGICAL_UNIT_COMMUNICATION_FAILURE, | |
5877 | 0); | |
5878 | transport_remove_cmd_from_queue(cmd, | |
e3d6f909 | 5879 | &cmd->se_lun->lun_se_dev->dev_queue_obj); |
c66ac9db NB |
5880 | |
5881 | transport_lun_remove_cmd(cmd); | |
5882 | transport_cmd_check_stop(cmd, 1, 0); | |
5883 | } else { | |
5884 | spin_unlock_irqrestore( | |
e3d6f909 | 5885 | &cmd->t_task->t_state_lock, flags); |
c66ac9db NB |
5886 | |
5887 | transport_remove_cmd_from_queue(cmd, | |
e3d6f909 | 5888 | &cmd->se_lun->lun_se_dev->dev_queue_obj); |
c66ac9db NB |
5889 | |
5890 | transport_lun_remove_cmd(cmd); | |
5891 | ||
5892 | if (transport_cmd_check_stop(cmd, 1, 0)) | |
5893 | transport_generic_remove(cmd, 0, 0); | |
5894 | } | |
5895 | ||
5896 | spin_lock_irqsave(&dev->execute_task_lock, flags); | |
5897 | continue; | |
5898 | } | |
5899 | DEBUG_DO("Got t_transport_active = 0 for task: %p, dev: %p\n", | |
5900 | task, dev); | |
5901 | ||
e3d6f909 | 5902 | if (atomic_read(&cmd->t_task->t_fe_count)) { |
c66ac9db | 5903 | spin_unlock_irqrestore( |
e3d6f909 | 5904 | &cmd->t_task->t_state_lock, flags); |
c66ac9db NB |
5905 | transport_send_check_condition_and_sense(cmd, |
5906 | TCM_LOGICAL_UNIT_COMMUNICATION_FAILURE, 0); | |
5907 | transport_remove_cmd_from_queue(cmd, | |
e3d6f909 | 5908 | &cmd->se_lun->lun_se_dev->dev_queue_obj); |
c66ac9db NB |
5909 | |
5910 | transport_lun_remove_cmd(cmd); | |
5911 | transport_cmd_check_stop(cmd, 1, 0); | |
5912 | } else { | |
5913 | spin_unlock_irqrestore( | |
e3d6f909 | 5914 | &cmd->t_task->t_state_lock, flags); |
c66ac9db NB |
5915 | |
5916 | transport_remove_cmd_from_queue(cmd, | |
e3d6f909 | 5917 | &cmd->se_lun->lun_se_dev->dev_queue_obj); |
c66ac9db NB |
5918 | transport_lun_remove_cmd(cmd); |
5919 | ||
5920 | if (transport_cmd_check_stop(cmd, 1, 0)) | |
5921 | transport_generic_remove(cmd, 0, 0); | |
5922 | } | |
5923 | ||
5924 | spin_lock_irqsave(&dev->execute_task_lock, flags); | |
5925 | } | |
5926 | spin_unlock_irqrestore(&dev->execute_task_lock, flags); | |
5927 | /* | |
5928 | * Empty the struct se_device's struct se_cmd list. | |
5929 | */ | |
e3d6f909 AG |
5930 | while ((qr = transport_get_qr_from_queue(&dev->dev_queue_obj))) { |
5931 | cmd = qr->cmd; | |
c66ac9db NB |
5932 | state = qr->state; |
5933 | kfree(qr); | |
5934 | ||
5935 | DEBUG_DO("From Device Queue: cmd: %p t_state: %d\n", | |
5936 | cmd, state); | |
5937 | ||
e3d6f909 | 5938 | if (atomic_read(&cmd->t_task->t_fe_count)) { |
c66ac9db NB |
5939 | transport_send_check_condition_and_sense(cmd, |
5940 | TCM_LOGICAL_UNIT_COMMUNICATION_FAILURE, 0); | |
5941 | ||
5942 | transport_lun_remove_cmd(cmd); | |
5943 | transport_cmd_check_stop(cmd, 1, 0); | |
5944 | } else { | |
5945 | transport_lun_remove_cmd(cmd); | |
5946 | if (transport_cmd_check_stop(cmd, 1, 0)) | |
5947 | transport_generic_remove(cmd, 0, 0); | |
5948 | } | |
c66ac9db | 5949 | } |
c66ac9db NB |
5950 | } |
5951 | ||
5952 | /* transport_processing_thread(): | |
5953 | * | |
5954 | * | |
5955 | */ | |
5956 | static int transport_processing_thread(void *param) | |
5957 | { | |
5958 | int ret, t_state; | |
5959 | struct se_cmd *cmd; | |
5960 | struct se_device *dev = (struct se_device *) param; | |
5961 | struct se_queue_req *qr; | |
5962 | ||
5963 | set_user_nice(current, -20); | |
5964 | ||
5965 | while (!kthread_should_stop()) { | |
e3d6f909 AG |
5966 | ret = wait_event_interruptible(dev->dev_queue_obj.thread_wq, |
5967 | atomic_read(&dev->dev_queue_obj.queue_cnt) || | |
c66ac9db NB |
5968 | kthread_should_stop()); |
5969 | if (ret < 0) | |
5970 | goto out; | |
5971 | ||
5972 | spin_lock_irq(&dev->dev_status_lock); | |
5973 | if (dev->dev_status & TRANSPORT_DEVICE_SHUTDOWN) { | |
5974 | spin_unlock_irq(&dev->dev_status_lock); | |
5975 | transport_processing_shutdown(dev); | |
5976 | continue; | |
5977 | } | |
5978 | spin_unlock_irq(&dev->dev_status_lock); | |
5979 | ||
5980 | get_cmd: | |
5981 | __transport_execute_tasks(dev); | |
5982 | ||
e3d6f909 | 5983 | qr = transport_get_qr_from_queue(&dev->dev_queue_obj); |
c66ac9db NB |
5984 | if (!(qr)) |
5985 | continue; | |
5986 | ||
e3d6f909 | 5987 | cmd = qr->cmd; |
c66ac9db NB |
5988 | t_state = qr->state; |
5989 | kfree(qr); | |
5990 | ||
5991 | switch (t_state) { | |
5992 | case TRANSPORT_NEW_CMD_MAP: | |
e3d6f909 AG |
5993 | if (!(cmd->se_tfo->new_cmd_map)) { |
5994 | printk(KERN_ERR "cmd->se_tfo->new_cmd_map is" | |
c66ac9db NB |
5995 | " NULL for TRANSPORT_NEW_CMD_MAP\n"); |
5996 | BUG(); | |
5997 | } | |
e3d6f909 | 5998 | ret = cmd->se_tfo->new_cmd_map(cmd); |
c66ac9db NB |
5999 | if (ret < 0) { |
6000 | cmd->transport_error_status = ret; | |
6001 | transport_generic_request_failure(cmd, NULL, | |
6002 | 0, (cmd->data_direction != | |
6003 | DMA_TO_DEVICE)); | |
6004 | break; | |
6005 | } | |
6006 | /* Fall through */ | |
6007 | case TRANSPORT_NEW_CMD: | |
6008 | ret = transport_generic_new_cmd(cmd); | |
6009 | if (ret < 0) { | |
6010 | cmd->transport_error_status = ret; | |
6011 | transport_generic_request_failure(cmd, NULL, | |
6012 | 0, (cmd->data_direction != | |
6013 | DMA_TO_DEVICE)); | |
6014 | } | |
6015 | break; | |
6016 | case TRANSPORT_PROCESS_WRITE: | |
6017 | transport_generic_process_write(cmd); | |
6018 | break; | |
6019 | case TRANSPORT_COMPLETE_OK: | |
6020 | transport_stop_all_task_timers(cmd); | |
6021 | transport_generic_complete_ok(cmd); | |
6022 | break; | |
6023 | case TRANSPORT_REMOVE: | |
6024 | transport_generic_remove(cmd, 1, 0); | |
6025 | break; | |
f4366772 NB |
6026 | case TRANSPORT_FREE_CMD_INTR: |
6027 | transport_generic_free_cmd(cmd, 0, 1, 0); | |
6028 | break; | |
c66ac9db NB |
6029 | case TRANSPORT_PROCESS_TMR: |
6030 | transport_generic_do_tmr(cmd); | |
6031 | break; | |
6032 | case TRANSPORT_COMPLETE_FAILURE: | |
6033 | transport_generic_request_failure(cmd, NULL, 1, 1); | |
6034 | break; | |
6035 | case TRANSPORT_COMPLETE_TIMEOUT: | |
6036 | transport_stop_all_task_timers(cmd); | |
6037 | transport_generic_request_timeout(cmd); | |
6038 | break; | |
6039 | default: | |
6040 | printk(KERN_ERR "Unknown t_state: %d deferred_t_state:" | |
6041 | " %d for ITT: 0x%08x i_state: %d on SE LUN:" | |
6042 | " %u\n", t_state, cmd->deferred_t_state, | |
e3d6f909 AG |
6043 | cmd->se_tfo->get_task_tag(cmd), |
6044 | cmd->se_tfo->get_cmd_state(cmd), | |
6045 | cmd->se_lun->unpacked_lun); | |
c66ac9db NB |
6046 | BUG(); |
6047 | } | |
6048 | ||
6049 | goto get_cmd; | |
6050 | } | |
6051 | ||
6052 | out: | |
6053 | transport_release_all_cmds(dev); | |
6054 | dev->process_thread = NULL; | |
6055 | return 0; | |
6056 | } |