Commit | Line | Data |
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c66ac9db NB |
1 | /******************************************************************************* |
2 | * Filename: target_core_transport.c | |
3 | * | |
4 | * This file contains the Generic Target Engine Core. | |
5 | * | |
4c76251e | 6 | * (c) Copyright 2002-2013 Datera, Inc. |
c66ac9db NB |
7 | * |
8 | * Nicholas A. Bellinger <nab@kernel.org> | |
9 | * | |
10 | * This program is free software; you can redistribute it and/or modify | |
11 | * it under the terms of the GNU General Public License as published by | |
12 | * the Free Software Foundation; either version 2 of the License, or | |
13 | * (at your option) any later version. | |
14 | * | |
15 | * This program is distributed in the hope that it will be useful, | |
16 | * but WITHOUT ANY WARRANTY; without even the implied warranty of | |
17 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
18 | * GNU General Public License for more details. | |
19 | * | |
20 | * You should have received a copy of the GNU General Public License | |
21 | * along with this program; if not, write to the Free Software | |
22 | * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. | |
23 | * | |
24 | ******************************************************************************/ | |
25 | ||
c66ac9db NB |
26 | #include <linux/net.h> |
27 | #include <linux/delay.h> | |
28 | #include <linux/string.h> | |
29 | #include <linux/timer.h> | |
30 | #include <linux/slab.h> | |
c66ac9db | 31 | #include <linux/spinlock.h> |
c66ac9db NB |
32 | #include <linux/kthread.h> |
33 | #include <linux/in.h> | |
34 | #include <linux/cdrom.h> | |
827509e3 | 35 | #include <linux/module.h> |
015487b8 | 36 | #include <linux/ratelimit.h> |
c66ac9db NB |
37 | #include <asm/unaligned.h> |
38 | #include <net/sock.h> | |
39 | #include <net/tcp.h> | |
40 | #include <scsi/scsi.h> | |
41 | #include <scsi/scsi_cmnd.h> | |
e66ecd50 | 42 | #include <scsi/scsi_tcq.h> |
c66ac9db NB |
43 | |
44 | #include <target/target_core_base.h> | |
c4795fb2 CH |
45 | #include <target/target_core_backend.h> |
46 | #include <target/target_core_fabric.h> | |
c66ac9db NB |
47 | #include <target/target_core_configfs.h> |
48 | ||
e26d99ae | 49 | #include "target_core_internal.h" |
c66ac9db | 50 | #include "target_core_alua.h" |
c66ac9db | 51 | #include "target_core_pr.h" |
c66ac9db NB |
52 | #include "target_core_ua.h" |
53 | ||
e5c0d6ad RD |
54 | #define CREATE_TRACE_POINTS |
55 | #include <trace/events/target.h> | |
56 | ||
35e0e757 | 57 | static struct workqueue_struct *target_completion_wq; |
c66ac9db | 58 | static struct kmem_cache *se_sess_cache; |
c66ac9db | 59 | struct kmem_cache *se_ua_cache; |
c66ac9db NB |
60 | struct kmem_cache *t10_pr_reg_cache; |
61 | struct kmem_cache *t10_alua_lu_gp_cache; | |
62 | struct kmem_cache *t10_alua_lu_gp_mem_cache; | |
63 | struct kmem_cache *t10_alua_tg_pt_gp_cache; | |
64 | struct kmem_cache *t10_alua_tg_pt_gp_mem_cache; | |
229d4f11 HR |
65 | struct kmem_cache *t10_alua_lba_map_cache; |
66 | struct kmem_cache *t10_alua_lba_map_mem_cache; | |
c66ac9db | 67 | |
c66ac9db | 68 | static void transport_complete_task_attr(struct se_cmd *cmd); |
07bde79a | 69 | static void transport_handle_queue_full(struct se_cmd *cmd, |
e057f533 | 70 | struct se_device *dev); |
d5ddad41 | 71 | static int transport_put_cmd(struct se_cmd *cmd); |
35e0e757 | 72 | static void target_complete_ok_work(struct work_struct *work); |
c66ac9db | 73 | |
e3d6f909 | 74 | int init_se_kmem_caches(void) |
c66ac9db | 75 | { |
c66ac9db NB |
76 | se_sess_cache = kmem_cache_create("se_sess_cache", |
77 | sizeof(struct se_session), __alignof__(struct se_session), | |
78 | 0, NULL); | |
6708bb27 AG |
79 | if (!se_sess_cache) { |
80 | pr_err("kmem_cache_create() for struct se_session" | |
c66ac9db | 81 | " failed\n"); |
c8e31f26 | 82 | goto out; |
c66ac9db NB |
83 | } |
84 | se_ua_cache = kmem_cache_create("se_ua_cache", | |
85 | sizeof(struct se_ua), __alignof__(struct se_ua), | |
86 | 0, NULL); | |
6708bb27 AG |
87 | if (!se_ua_cache) { |
88 | pr_err("kmem_cache_create() for struct se_ua failed\n"); | |
35e0e757 | 89 | goto out_free_sess_cache; |
c66ac9db | 90 | } |
c66ac9db NB |
91 | t10_pr_reg_cache = kmem_cache_create("t10_pr_reg_cache", |
92 | sizeof(struct t10_pr_registration), | |
93 | __alignof__(struct t10_pr_registration), 0, NULL); | |
6708bb27 AG |
94 | if (!t10_pr_reg_cache) { |
95 | pr_err("kmem_cache_create() for struct t10_pr_registration" | |
c66ac9db | 96 | " failed\n"); |
35e0e757 | 97 | goto out_free_ua_cache; |
c66ac9db NB |
98 | } |
99 | t10_alua_lu_gp_cache = kmem_cache_create("t10_alua_lu_gp_cache", | |
100 | sizeof(struct t10_alua_lu_gp), __alignof__(struct t10_alua_lu_gp), | |
101 | 0, NULL); | |
6708bb27 AG |
102 | if (!t10_alua_lu_gp_cache) { |
103 | pr_err("kmem_cache_create() for t10_alua_lu_gp_cache" | |
c66ac9db | 104 | " failed\n"); |
35e0e757 | 105 | goto out_free_pr_reg_cache; |
c66ac9db NB |
106 | } |
107 | t10_alua_lu_gp_mem_cache = kmem_cache_create("t10_alua_lu_gp_mem_cache", | |
108 | sizeof(struct t10_alua_lu_gp_member), | |
109 | __alignof__(struct t10_alua_lu_gp_member), 0, NULL); | |
6708bb27 AG |
110 | if (!t10_alua_lu_gp_mem_cache) { |
111 | pr_err("kmem_cache_create() for t10_alua_lu_gp_mem_" | |
c66ac9db | 112 | "cache failed\n"); |
35e0e757 | 113 | goto out_free_lu_gp_cache; |
c66ac9db NB |
114 | } |
115 | t10_alua_tg_pt_gp_cache = kmem_cache_create("t10_alua_tg_pt_gp_cache", | |
116 | sizeof(struct t10_alua_tg_pt_gp), | |
117 | __alignof__(struct t10_alua_tg_pt_gp), 0, NULL); | |
6708bb27 AG |
118 | if (!t10_alua_tg_pt_gp_cache) { |
119 | pr_err("kmem_cache_create() for t10_alua_tg_pt_gp_" | |
c66ac9db | 120 | "cache failed\n"); |
35e0e757 | 121 | goto out_free_lu_gp_mem_cache; |
c66ac9db NB |
122 | } |
123 | t10_alua_tg_pt_gp_mem_cache = kmem_cache_create( | |
124 | "t10_alua_tg_pt_gp_mem_cache", | |
125 | sizeof(struct t10_alua_tg_pt_gp_member), | |
126 | __alignof__(struct t10_alua_tg_pt_gp_member), | |
127 | 0, NULL); | |
6708bb27 AG |
128 | if (!t10_alua_tg_pt_gp_mem_cache) { |
129 | pr_err("kmem_cache_create() for t10_alua_tg_pt_gp_" | |
c66ac9db | 130 | "mem_t failed\n"); |
35e0e757 | 131 | goto out_free_tg_pt_gp_cache; |
c66ac9db | 132 | } |
229d4f11 HR |
133 | t10_alua_lba_map_cache = kmem_cache_create( |
134 | "t10_alua_lba_map_cache", | |
135 | sizeof(struct t10_alua_lba_map), | |
136 | __alignof__(struct t10_alua_lba_map), 0, NULL); | |
137 | if (!t10_alua_lba_map_cache) { | |
138 | pr_err("kmem_cache_create() for t10_alua_lba_map_" | |
139 | "cache failed\n"); | |
140 | goto out_free_tg_pt_gp_mem_cache; | |
141 | } | |
142 | t10_alua_lba_map_mem_cache = kmem_cache_create( | |
143 | "t10_alua_lba_map_mem_cache", | |
144 | sizeof(struct t10_alua_lba_map_member), | |
145 | __alignof__(struct t10_alua_lba_map_member), 0, NULL); | |
146 | if (!t10_alua_lba_map_mem_cache) { | |
147 | pr_err("kmem_cache_create() for t10_alua_lba_map_mem_" | |
148 | "cache failed\n"); | |
149 | goto out_free_lba_map_cache; | |
150 | } | |
c66ac9db | 151 | |
35e0e757 CH |
152 | target_completion_wq = alloc_workqueue("target_completion", |
153 | WQ_MEM_RECLAIM, 0); | |
154 | if (!target_completion_wq) | |
229d4f11 | 155 | goto out_free_lba_map_mem_cache; |
35e0e757 | 156 | |
c66ac9db | 157 | return 0; |
35e0e757 | 158 | |
229d4f11 HR |
159 | out_free_lba_map_mem_cache: |
160 | kmem_cache_destroy(t10_alua_lba_map_mem_cache); | |
161 | out_free_lba_map_cache: | |
162 | kmem_cache_destroy(t10_alua_lba_map_cache); | |
35e0e757 CH |
163 | out_free_tg_pt_gp_mem_cache: |
164 | kmem_cache_destroy(t10_alua_tg_pt_gp_mem_cache); | |
165 | out_free_tg_pt_gp_cache: | |
166 | kmem_cache_destroy(t10_alua_tg_pt_gp_cache); | |
167 | out_free_lu_gp_mem_cache: | |
168 | kmem_cache_destroy(t10_alua_lu_gp_mem_cache); | |
169 | out_free_lu_gp_cache: | |
170 | kmem_cache_destroy(t10_alua_lu_gp_cache); | |
171 | out_free_pr_reg_cache: | |
172 | kmem_cache_destroy(t10_pr_reg_cache); | |
173 | out_free_ua_cache: | |
174 | kmem_cache_destroy(se_ua_cache); | |
175 | out_free_sess_cache: | |
176 | kmem_cache_destroy(se_sess_cache); | |
c66ac9db | 177 | out: |
e3d6f909 | 178 | return -ENOMEM; |
c66ac9db NB |
179 | } |
180 | ||
e3d6f909 | 181 | void release_se_kmem_caches(void) |
c66ac9db | 182 | { |
35e0e757 | 183 | destroy_workqueue(target_completion_wq); |
c66ac9db NB |
184 | kmem_cache_destroy(se_sess_cache); |
185 | kmem_cache_destroy(se_ua_cache); | |
c66ac9db NB |
186 | kmem_cache_destroy(t10_pr_reg_cache); |
187 | kmem_cache_destroy(t10_alua_lu_gp_cache); | |
188 | kmem_cache_destroy(t10_alua_lu_gp_mem_cache); | |
189 | kmem_cache_destroy(t10_alua_tg_pt_gp_cache); | |
190 | kmem_cache_destroy(t10_alua_tg_pt_gp_mem_cache); | |
229d4f11 HR |
191 | kmem_cache_destroy(t10_alua_lba_map_cache); |
192 | kmem_cache_destroy(t10_alua_lba_map_mem_cache); | |
c66ac9db NB |
193 | } |
194 | ||
e3d6f909 AG |
195 | /* This code ensures unique mib indexes are handed out. */ |
196 | static DEFINE_SPINLOCK(scsi_mib_index_lock); | |
197 | static u32 scsi_mib_index[SCSI_INDEX_TYPE_MAX]; | |
e89d15ee NB |
198 | |
199 | /* | |
200 | * Allocate a new row index for the entry type specified | |
201 | */ | |
202 | u32 scsi_get_new_index(scsi_index_t type) | |
203 | { | |
204 | u32 new_index; | |
205 | ||
e3d6f909 | 206 | BUG_ON((type < 0) || (type >= SCSI_INDEX_TYPE_MAX)); |
e89d15ee | 207 | |
e3d6f909 AG |
208 | spin_lock(&scsi_mib_index_lock); |
209 | new_index = ++scsi_mib_index[type]; | |
210 | spin_unlock(&scsi_mib_index_lock); | |
e89d15ee NB |
211 | |
212 | return new_index; | |
213 | } | |
214 | ||
dbc5623e | 215 | void transport_subsystem_check_init(void) |
c66ac9db NB |
216 | { |
217 | int ret; | |
283669d2 | 218 | static int sub_api_initialized; |
c66ac9db | 219 | |
dbc5623e NB |
220 | if (sub_api_initialized) |
221 | return; | |
222 | ||
c66ac9db NB |
223 | ret = request_module("target_core_iblock"); |
224 | if (ret != 0) | |
6708bb27 | 225 | pr_err("Unable to load target_core_iblock\n"); |
c66ac9db NB |
226 | |
227 | ret = request_module("target_core_file"); | |
228 | if (ret != 0) | |
6708bb27 | 229 | pr_err("Unable to load target_core_file\n"); |
c66ac9db NB |
230 | |
231 | ret = request_module("target_core_pscsi"); | |
232 | if (ret != 0) | |
6708bb27 | 233 | pr_err("Unable to load target_core_pscsi\n"); |
c66ac9db | 234 | |
7c9e7a6f AG |
235 | ret = request_module("target_core_user"); |
236 | if (ret != 0) | |
237 | pr_err("Unable to load target_core_user\n"); | |
238 | ||
e3d6f909 | 239 | sub_api_initialized = 1; |
c66ac9db NB |
240 | } |
241 | ||
e70beee7 | 242 | struct se_session *transport_init_session(enum target_prot_op sup_prot_ops) |
c66ac9db NB |
243 | { |
244 | struct se_session *se_sess; | |
245 | ||
246 | se_sess = kmem_cache_zalloc(se_sess_cache, GFP_KERNEL); | |
6708bb27 AG |
247 | if (!se_sess) { |
248 | pr_err("Unable to allocate struct se_session from" | |
c66ac9db NB |
249 | " se_sess_cache\n"); |
250 | return ERR_PTR(-ENOMEM); | |
251 | } | |
252 | INIT_LIST_HEAD(&se_sess->sess_list); | |
253 | INIT_LIST_HEAD(&se_sess->sess_acl_list); | |
a17f091d | 254 | INIT_LIST_HEAD(&se_sess->sess_cmd_list); |
9b31a328 | 255 | INIT_LIST_HEAD(&se_sess->sess_wait_list); |
a17f091d | 256 | spin_lock_init(&se_sess->sess_cmd_lock); |
41ac82b6 | 257 | kref_init(&se_sess->sess_kref); |
e70beee7 | 258 | se_sess->sup_prot_ops = sup_prot_ops; |
c66ac9db NB |
259 | |
260 | return se_sess; | |
261 | } | |
262 | EXPORT_SYMBOL(transport_init_session); | |
263 | ||
c0add7fd NB |
264 | int transport_alloc_session_tags(struct se_session *se_sess, |
265 | unsigned int tag_num, unsigned int tag_size) | |
266 | { | |
267 | int rc; | |
268 | ||
8c7f6e9b NB |
269 | se_sess->sess_cmd_map = kzalloc(tag_num * tag_size, |
270 | GFP_KERNEL | __GFP_NOWARN | __GFP_REPEAT); | |
c0add7fd | 271 | if (!se_sess->sess_cmd_map) { |
8c7f6e9b NB |
272 | se_sess->sess_cmd_map = vzalloc(tag_num * tag_size); |
273 | if (!se_sess->sess_cmd_map) { | |
274 | pr_err("Unable to allocate se_sess->sess_cmd_map\n"); | |
275 | return -ENOMEM; | |
276 | } | |
c0add7fd NB |
277 | } |
278 | ||
279 | rc = percpu_ida_init(&se_sess->sess_tag_pool, tag_num); | |
280 | if (rc < 0) { | |
281 | pr_err("Unable to init se_sess->sess_tag_pool," | |
282 | " tag_num: %u\n", tag_num); | |
8c7f6e9b NB |
283 | if (is_vmalloc_addr(se_sess->sess_cmd_map)) |
284 | vfree(se_sess->sess_cmd_map); | |
285 | else | |
286 | kfree(se_sess->sess_cmd_map); | |
c0add7fd NB |
287 | se_sess->sess_cmd_map = NULL; |
288 | return -ENOMEM; | |
289 | } | |
290 | ||
291 | return 0; | |
292 | } | |
293 | EXPORT_SYMBOL(transport_alloc_session_tags); | |
294 | ||
295 | struct se_session *transport_init_session_tags(unsigned int tag_num, | |
e70beee7 NB |
296 | unsigned int tag_size, |
297 | enum target_prot_op sup_prot_ops) | |
c0add7fd NB |
298 | { |
299 | struct se_session *se_sess; | |
300 | int rc; | |
301 | ||
e70beee7 | 302 | se_sess = transport_init_session(sup_prot_ops); |
c0add7fd NB |
303 | if (IS_ERR(se_sess)) |
304 | return se_sess; | |
305 | ||
306 | rc = transport_alloc_session_tags(se_sess, tag_num, tag_size); | |
307 | if (rc < 0) { | |
308 | transport_free_session(se_sess); | |
309 | return ERR_PTR(-ENOMEM); | |
310 | } | |
311 | ||
312 | return se_sess; | |
313 | } | |
314 | EXPORT_SYMBOL(transport_init_session_tags); | |
315 | ||
c66ac9db | 316 | /* |
140854cb | 317 | * Called with spin_lock_irqsave(&struct se_portal_group->session_lock called. |
c66ac9db NB |
318 | */ |
319 | void __transport_register_session( | |
320 | struct se_portal_group *se_tpg, | |
321 | struct se_node_acl *se_nacl, | |
322 | struct se_session *se_sess, | |
323 | void *fabric_sess_ptr) | |
324 | { | |
325 | unsigned char buf[PR_REG_ISID_LEN]; | |
326 | ||
327 | se_sess->se_tpg = se_tpg; | |
328 | se_sess->fabric_sess_ptr = fabric_sess_ptr; | |
329 | /* | |
330 | * Used by struct se_node_acl's under ConfigFS to locate active se_session-t | |
331 | * | |
332 | * Only set for struct se_session's that will actually be moving I/O. | |
333 | * eg: *NOT* discovery sessions. | |
334 | */ | |
335 | if (se_nacl) { | |
336 | /* | |
337 | * If the fabric module supports an ISID based TransportID, | |
338 | * save this value in binary from the fabric I_T Nexus now. | |
339 | */ | |
e3d6f909 | 340 | if (se_tpg->se_tpg_tfo->sess_get_initiator_sid != NULL) { |
c66ac9db | 341 | memset(&buf[0], 0, PR_REG_ISID_LEN); |
e3d6f909 | 342 | se_tpg->se_tpg_tfo->sess_get_initiator_sid(se_sess, |
c66ac9db NB |
343 | &buf[0], PR_REG_ISID_LEN); |
344 | se_sess->sess_bin_isid = get_unaligned_be64(&buf[0]); | |
345 | } | |
afb999ff NB |
346 | kref_get(&se_nacl->acl_kref); |
347 | ||
c66ac9db NB |
348 | spin_lock_irq(&se_nacl->nacl_sess_lock); |
349 | /* | |
350 | * The se_nacl->nacl_sess pointer will be set to the | |
351 | * last active I_T Nexus for each struct se_node_acl. | |
352 | */ | |
353 | se_nacl->nacl_sess = se_sess; | |
354 | ||
355 | list_add_tail(&se_sess->sess_acl_list, | |
356 | &se_nacl->acl_sess_list); | |
357 | spin_unlock_irq(&se_nacl->nacl_sess_lock); | |
358 | } | |
359 | list_add_tail(&se_sess->sess_list, &se_tpg->tpg_sess_list); | |
360 | ||
6708bb27 | 361 | pr_debug("TARGET_CORE[%s]: Registered fabric_sess_ptr: %p\n", |
e3d6f909 | 362 | se_tpg->se_tpg_tfo->get_fabric_name(), se_sess->fabric_sess_ptr); |
c66ac9db NB |
363 | } |
364 | EXPORT_SYMBOL(__transport_register_session); | |
365 | ||
366 | void transport_register_session( | |
367 | struct se_portal_group *se_tpg, | |
368 | struct se_node_acl *se_nacl, | |
369 | struct se_session *se_sess, | |
370 | void *fabric_sess_ptr) | |
371 | { | |
140854cb NB |
372 | unsigned long flags; |
373 | ||
374 | spin_lock_irqsave(&se_tpg->session_lock, flags); | |
c66ac9db | 375 | __transport_register_session(se_tpg, se_nacl, se_sess, fabric_sess_ptr); |
140854cb | 376 | spin_unlock_irqrestore(&se_tpg->session_lock, flags); |
c66ac9db NB |
377 | } |
378 | EXPORT_SYMBOL(transport_register_session); | |
379 | ||
ecf0dd66 | 380 | static void target_release_session(struct kref *kref) |
41ac82b6 NB |
381 | { |
382 | struct se_session *se_sess = container_of(kref, | |
383 | struct se_session, sess_kref); | |
384 | struct se_portal_group *se_tpg = se_sess->se_tpg; | |
385 | ||
386 | se_tpg->se_tpg_tfo->close_session(se_sess); | |
387 | } | |
388 | ||
389 | void target_get_session(struct se_session *se_sess) | |
390 | { | |
391 | kref_get(&se_sess->sess_kref); | |
392 | } | |
393 | EXPORT_SYMBOL(target_get_session); | |
394 | ||
33933a0e | 395 | void target_put_session(struct se_session *se_sess) |
41ac82b6 | 396 | { |
4149268e JE |
397 | struct se_portal_group *tpg = se_sess->se_tpg; |
398 | ||
399 | if (tpg->se_tpg_tfo->put_session != NULL) { | |
400 | tpg->se_tpg_tfo->put_session(se_sess); | |
401 | return; | |
402 | } | |
33933a0e | 403 | kref_put(&se_sess->sess_kref, target_release_session); |
41ac82b6 NB |
404 | } |
405 | EXPORT_SYMBOL(target_put_session); | |
406 | ||
f8e471f9 NB |
407 | ssize_t target_show_dynamic_sessions(struct se_portal_group *se_tpg, char *page) |
408 | { | |
409 | struct se_session *se_sess; | |
410 | ssize_t len = 0; | |
411 | ||
412 | spin_lock_bh(&se_tpg->session_lock); | |
413 | list_for_each_entry(se_sess, &se_tpg->tpg_sess_list, sess_list) { | |
414 | if (!se_sess->se_node_acl) | |
415 | continue; | |
416 | if (!se_sess->se_node_acl->dynamic_node_acl) | |
417 | continue; | |
418 | if (strlen(se_sess->se_node_acl->initiatorname) + 1 + len > PAGE_SIZE) | |
419 | break; | |
420 | ||
421 | len += snprintf(page + len, PAGE_SIZE - len, "%s\n", | |
422 | se_sess->se_node_acl->initiatorname); | |
423 | len += 1; /* Include NULL terminator */ | |
424 | } | |
425 | spin_unlock_bh(&se_tpg->session_lock); | |
426 | ||
427 | return len; | |
428 | } | |
429 | EXPORT_SYMBOL(target_show_dynamic_sessions); | |
430 | ||
afb999ff NB |
431 | static void target_complete_nacl(struct kref *kref) |
432 | { | |
433 | struct se_node_acl *nacl = container_of(kref, | |
434 | struct se_node_acl, acl_kref); | |
435 | ||
436 | complete(&nacl->acl_free_comp); | |
437 | } | |
438 | ||
439 | void target_put_nacl(struct se_node_acl *nacl) | |
440 | { | |
441 | kref_put(&nacl->acl_kref, target_complete_nacl); | |
442 | } | |
443 | ||
c66ac9db NB |
444 | void transport_deregister_session_configfs(struct se_session *se_sess) |
445 | { | |
446 | struct se_node_acl *se_nacl; | |
23388864 | 447 | unsigned long flags; |
c66ac9db NB |
448 | /* |
449 | * Used by struct se_node_acl's under ConfigFS to locate active struct se_session | |
450 | */ | |
451 | se_nacl = se_sess->se_node_acl; | |
6708bb27 | 452 | if (se_nacl) { |
23388864 | 453 | spin_lock_irqsave(&se_nacl->nacl_sess_lock, flags); |
337c0607 NB |
454 | if (se_nacl->acl_stop == 0) |
455 | list_del(&se_sess->sess_acl_list); | |
c66ac9db NB |
456 | /* |
457 | * If the session list is empty, then clear the pointer. | |
458 | * Otherwise, set the struct se_session pointer from the tail | |
459 | * element of the per struct se_node_acl active session list. | |
460 | */ | |
461 | if (list_empty(&se_nacl->acl_sess_list)) | |
462 | se_nacl->nacl_sess = NULL; | |
463 | else { | |
464 | se_nacl->nacl_sess = container_of( | |
465 | se_nacl->acl_sess_list.prev, | |
466 | struct se_session, sess_acl_list); | |
467 | } | |
23388864 | 468 | spin_unlock_irqrestore(&se_nacl->nacl_sess_lock, flags); |
c66ac9db NB |
469 | } |
470 | } | |
471 | EXPORT_SYMBOL(transport_deregister_session_configfs); | |
472 | ||
473 | void transport_free_session(struct se_session *se_sess) | |
474 | { | |
c0add7fd NB |
475 | if (se_sess->sess_cmd_map) { |
476 | percpu_ida_destroy(&se_sess->sess_tag_pool); | |
8c7f6e9b NB |
477 | if (is_vmalloc_addr(se_sess->sess_cmd_map)) |
478 | vfree(se_sess->sess_cmd_map); | |
479 | else | |
480 | kfree(se_sess->sess_cmd_map); | |
c0add7fd | 481 | } |
c66ac9db NB |
482 | kmem_cache_free(se_sess_cache, se_sess); |
483 | } | |
484 | EXPORT_SYMBOL(transport_free_session); | |
485 | ||
486 | void transport_deregister_session(struct se_session *se_sess) | |
487 | { | |
488 | struct se_portal_group *se_tpg = se_sess->se_tpg; | |
01468346 | 489 | struct target_core_fabric_ops *se_tfo; |
c66ac9db | 490 | struct se_node_acl *se_nacl; |
e63a8e19 | 491 | unsigned long flags; |
01468346 | 492 | bool comp_nacl = true; |
c66ac9db | 493 | |
6708bb27 | 494 | if (!se_tpg) { |
c66ac9db NB |
495 | transport_free_session(se_sess); |
496 | return; | |
497 | } | |
01468346 | 498 | se_tfo = se_tpg->se_tpg_tfo; |
c66ac9db | 499 | |
e63a8e19 | 500 | spin_lock_irqsave(&se_tpg->session_lock, flags); |
c66ac9db NB |
501 | list_del(&se_sess->sess_list); |
502 | se_sess->se_tpg = NULL; | |
503 | se_sess->fabric_sess_ptr = NULL; | |
e63a8e19 | 504 | spin_unlock_irqrestore(&se_tpg->session_lock, flags); |
c66ac9db NB |
505 | |
506 | /* | |
507 | * Determine if we need to do extra work for this initiator node's | |
508 | * struct se_node_acl if it had been previously dynamically generated. | |
509 | */ | |
510 | se_nacl = se_sess->se_node_acl; | |
01468346 NB |
511 | |
512 | spin_lock_irqsave(&se_tpg->acl_node_lock, flags); | |
513 | if (se_nacl && se_nacl->dynamic_node_acl) { | |
514 | if (!se_tfo->tpg_check_demo_mode_cache(se_tpg)) { | |
515 | list_del(&se_nacl->acl_list); | |
516 | se_tpg->num_node_acls--; | |
517 | spin_unlock_irqrestore(&se_tpg->acl_node_lock, flags); | |
518 | core_tpg_wait_for_nacl_pr_ref(se_nacl); | |
519 | core_free_device_list_for_node(se_nacl, se_tpg); | |
520 | se_tfo->tpg_release_fabric_acl(se_tpg, se_nacl); | |
521 | ||
522 | comp_nacl = false; | |
523 | spin_lock_irqsave(&se_tpg->acl_node_lock, flags); | |
c66ac9db | 524 | } |
c66ac9db | 525 | } |
01468346 | 526 | spin_unlock_irqrestore(&se_tpg->acl_node_lock, flags); |
c66ac9db | 527 | |
6708bb27 | 528 | pr_debug("TARGET_CORE[%s]: Deregistered fabric_sess\n", |
e3d6f909 | 529 | se_tpg->se_tpg_tfo->get_fabric_name()); |
01468346 | 530 | /* |
125d0119 | 531 | * If last kref is dropping now for an explicit NodeACL, awake sleeping |
afb999ff NB |
532 | * ->acl_free_comp caller to wakeup configfs se_node_acl->acl_group |
533 | * removal context. | |
01468346 | 534 | */ |
0bcc297e | 535 | if (se_nacl && comp_nacl) |
afb999ff | 536 | target_put_nacl(se_nacl); |
01468346 | 537 | |
afb999ff | 538 | transport_free_session(se_sess); |
c66ac9db NB |
539 | } |
540 | EXPORT_SYMBOL(transport_deregister_session); | |
541 | ||
542 | /* | |
a1d8b49a | 543 | * Called with cmd->t_state_lock held. |
c66ac9db | 544 | */ |
cf572a96 | 545 | static void target_remove_from_state_list(struct se_cmd *cmd) |
c66ac9db | 546 | { |
42bf829e | 547 | struct se_device *dev = cmd->se_dev; |
c66ac9db NB |
548 | unsigned long flags; |
549 | ||
42bf829e CH |
550 | if (!dev) |
551 | return; | |
c66ac9db | 552 | |
cf572a96 CH |
553 | if (cmd->transport_state & CMD_T_BUSY) |
554 | return; | |
c66ac9db | 555 | |
cf572a96 CH |
556 | spin_lock_irqsave(&dev->execute_task_lock, flags); |
557 | if (cmd->state_active) { | |
558 | list_del(&cmd->state_list); | |
cf572a96 | 559 | cmd->state_active = false; |
c66ac9db | 560 | } |
cf572a96 | 561 | spin_unlock_irqrestore(&dev->execute_task_lock, flags); |
c66ac9db NB |
562 | } |
563 | ||
862e6389 NB |
564 | static int transport_cmd_check_stop(struct se_cmd *cmd, bool remove_from_lists, |
565 | bool write_pending) | |
c66ac9db NB |
566 | { |
567 | unsigned long flags; | |
568 | ||
a1d8b49a | 569 | spin_lock_irqsave(&cmd->t_state_lock, flags); |
862e6389 NB |
570 | if (write_pending) |
571 | cmd->t_state = TRANSPORT_WRITE_PENDING; | |
572 | ||
f7113a47 CH |
573 | if (remove_from_lists) { |
574 | target_remove_from_state_list(cmd); | |
575 | ||
576 | /* | |
577 | * Clear struct se_cmd->se_lun before the handoff to FE. | |
578 | */ | |
579 | cmd->se_lun = NULL; | |
580 | } | |
581 | ||
c66ac9db NB |
582 | /* |
583 | * Determine if frontend context caller is requesting the stopping of | |
e3d6f909 | 584 | * this command for frontend exceptions. |
c66ac9db | 585 | */ |
7d680f3b CH |
586 | if (cmd->transport_state & CMD_T_STOP) { |
587 | pr_debug("%s:%d CMD_T_STOP for ITT: 0x%08x\n", | |
588 | __func__, __LINE__, | |
e3d6f909 | 589 | cmd->se_tfo->get_task_tag(cmd)); |
c66ac9db | 590 | |
a1d8b49a | 591 | spin_unlock_irqrestore(&cmd->t_state_lock, flags); |
c66ac9db | 592 | |
a95d6511 | 593 | complete_all(&cmd->t_transport_stop_comp); |
c66ac9db NB |
594 | return 1; |
595 | } | |
f7113a47 CH |
596 | |
597 | cmd->transport_state &= ~CMD_T_ACTIVE; | |
598 | if (remove_from_lists) { | |
599 | /* | |
600 | * Some fabric modules like tcm_loop can release | |
601 | * their internally allocated I/O reference now and | |
602 | * struct se_cmd now. | |
603 | * | |
604 | * Fabric modules are expected to return '1' here if the | |
605 | * se_cmd being passed is released at this point, | |
606 | * or zero if not being released. | |
607 | */ | |
608 | if (cmd->se_tfo->check_stop_free != NULL) { | |
609 | spin_unlock_irqrestore(&cmd->t_state_lock, flags); | |
610 | return cmd->se_tfo->check_stop_free(cmd); | |
c66ac9db | 611 | } |
f7113a47 | 612 | } |
c66ac9db | 613 | |
a1d8b49a | 614 | spin_unlock_irqrestore(&cmd->t_state_lock, flags); |
c66ac9db NB |
615 | return 0; |
616 | } | |
617 | ||
618 | static int transport_cmd_check_stop_to_fabric(struct se_cmd *cmd) | |
619 | { | |
862e6389 | 620 | return transport_cmd_check_stop(cmd, true, false); |
c66ac9db NB |
621 | } |
622 | ||
623 | static void transport_lun_remove_cmd(struct se_cmd *cmd) | |
624 | { | |
e3d6f909 | 625 | struct se_lun *lun = cmd->se_lun; |
c66ac9db | 626 | |
5259a06e | 627 | if (!lun) |
c66ac9db NB |
628 | return; |
629 | ||
5259a06e NB |
630 | if (cmpxchg(&cmd->lun_ref_active, true, false)) |
631 | percpu_ref_put(&lun->lun_ref); | |
c66ac9db NB |
632 | } |
633 | ||
634 | void transport_cmd_finish_abort(struct se_cmd *cmd, int remove) | |
635 | { | |
68259b5a AL |
636 | if (cmd->se_cmd_flags & SCF_SE_LUN_CMD) |
637 | transport_lun_remove_cmd(cmd); | |
131e6abc NB |
638 | /* |
639 | * Allow the fabric driver to unmap any resources before | |
640 | * releasing the descriptor via TFO->release_cmd() | |
641 | */ | |
642 | if (remove) | |
643 | cmd->se_tfo->aborted_task(cmd); | |
68259b5a | 644 | |
c66ac9db NB |
645 | if (transport_cmd_check_stop_to_fabric(cmd)) |
646 | return; | |
af877292 | 647 | if (remove) |
e6a2573f | 648 | transport_put_cmd(cmd); |
c66ac9db NB |
649 | } |
650 | ||
35e0e757 CH |
651 | static void target_complete_failure_work(struct work_struct *work) |
652 | { | |
653 | struct se_cmd *cmd = container_of(work, struct se_cmd, work); | |
654 | ||
de103c93 CH |
655 | transport_generic_request_failure(cmd, |
656 | TCM_LOGICAL_UNIT_COMMUNICATION_FAILURE); | |
35e0e757 CH |
657 | } |
658 | ||
6138ed2a | 659 | /* |
d5829eac PB |
660 | * Used when asking transport to copy Sense Data from the underlying |
661 | * Linux/SCSI struct scsi_cmnd | |
6138ed2a | 662 | */ |
d5829eac | 663 | static unsigned char *transport_get_sense_buffer(struct se_cmd *cmd) |
6138ed2a | 664 | { |
6138ed2a | 665 | struct se_device *dev = cmd->se_dev; |
6138ed2a PB |
666 | |
667 | WARN_ON(!cmd->se_lun); | |
668 | ||
669 | if (!dev) | |
d5829eac | 670 | return NULL; |
6138ed2a | 671 | |
d5829eac PB |
672 | if (cmd->se_cmd_flags & SCF_SENT_CHECK_CONDITION) |
673 | return NULL; | |
6138ed2a | 674 | |
9c58b7dd | 675 | cmd->scsi_sense_length = TRANSPORT_SENSE_BUFFER; |
6138ed2a | 676 | |
d5829eac | 677 | pr_debug("HBA_[%u]_PLUG[%s]: Requesting sense for SAM STATUS: 0x%02x\n", |
6138ed2a | 678 | dev->se_hba->hba_id, dev->transport->name, cmd->scsi_status); |
9c58b7dd | 679 | return cmd->sense_buffer; |
6138ed2a PB |
680 | } |
681 | ||
5787cacd | 682 | void target_complete_cmd(struct se_cmd *cmd, u8 scsi_status) |
c66ac9db | 683 | { |
42bf829e | 684 | struct se_device *dev = cmd->se_dev; |
5787cacd | 685 | int success = scsi_status == GOOD; |
c66ac9db | 686 | unsigned long flags; |
c66ac9db | 687 | |
5787cacd CH |
688 | cmd->scsi_status = scsi_status; |
689 | ||
690 | ||
a1d8b49a | 691 | spin_lock_irqsave(&cmd->t_state_lock, flags); |
cf572a96 | 692 | cmd->transport_state &= ~CMD_T_BUSY; |
c66ac9db | 693 | |
c66ac9db | 694 | if (dev && dev->transport->transport_complete) { |
d5829eac PB |
695 | dev->transport->transport_complete(cmd, |
696 | cmd->t_data_sg, | |
697 | transport_get_sense_buffer(cmd)); | |
698 | if (cmd->se_cmd_flags & SCF_TRANSPORT_TASK_SENSE) | |
c66ac9db | 699 | success = 1; |
c66ac9db NB |
700 | } |
701 | ||
702 | /* | |
5787cacd | 703 | * See if we are waiting to complete for an exception condition. |
c66ac9db | 704 | */ |
cf572a96 | 705 | if (cmd->transport_state & CMD_T_REQUEST_STOP) { |
a1d8b49a | 706 | spin_unlock_irqrestore(&cmd->t_state_lock, flags); |
cf572a96 | 707 | complete(&cmd->task_stop_comp); |
c66ac9db NB |
708 | return; |
709 | } | |
2235007c | 710 | |
3d28934a | 711 | /* |
125d0119 | 712 | * Check for case where an explicit ABORT_TASK has been received |
3d28934a NB |
713 | * and transport_wait_for_tasks() will be waiting for completion.. |
714 | */ | |
715 | if (cmd->transport_state & CMD_T_ABORTED && | |
716 | cmd->transport_state & CMD_T_STOP) { | |
717 | spin_unlock_irqrestore(&cmd->t_state_lock, flags); | |
a95d6511 | 718 | complete_all(&cmd->t_transport_stop_comp); |
3d28934a | 719 | return; |
3dca1471 | 720 | } else if (!success) { |
35e0e757 | 721 | INIT_WORK(&cmd->work, target_complete_failure_work); |
c66ac9db | 722 | } else { |
35e0e757 | 723 | INIT_WORK(&cmd->work, target_complete_ok_work); |
c66ac9db | 724 | } |
35e0e757 | 725 | |
35e0e757 | 726 | cmd->t_state = TRANSPORT_COMPLETE; |
3d28934a | 727 | cmd->transport_state |= (CMD_T_COMPLETE | CMD_T_ACTIVE); |
a1d8b49a | 728 | spin_unlock_irqrestore(&cmd->t_state_lock, flags); |
c66ac9db | 729 | |
35e0e757 | 730 | queue_work(target_completion_wq, &cmd->work); |
c66ac9db | 731 | } |
6bb35e00 CH |
732 | EXPORT_SYMBOL(target_complete_cmd); |
733 | ||
2426bd45 RD |
734 | void target_complete_cmd_with_length(struct se_cmd *cmd, u8 scsi_status, int length) |
735 | { | |
736 | if (scsi_status == SAM_STAT_GOOD && length < cmd->data_length) { | |
737 | if (cmd->se_cmd_flags & SCF_UNDERFLOW_BIT) { | |
738 | cmd->residual_count += cmd->data_length - length; | |
739 | } else { | |
740 | cmd->se_cmd_flags |= SCF_UNDERFLOW_BIT; | |
741 | cmd->residual_count = cmd->data_length - length; | |
742 | } | |
743 | ||
744 | cmd->data_length = length; | |
745 | } | |
746 | ||
747 | target_complete_cmd(cmd, scsi_status); | |
748 | } | |
749 | EXPORT_SYMBOL(target_complete_cmd_with_length); | |
750 | ||
cf572a96 | 751 | static void target_add_to_state_list(struct se_cmd *cmd) |
c66ac9db | 752 | { |
cf572a96 CH |
753 | struct se_device *dev = cmd->se_dev; |
754 | unsigned long flags; | |
c66ac9db | 755 | |
cf572a96 CH |
756 | spin_lock_irqsave(&dev->execute_task_lock, flags); |
757 | if (!cmd->state_active) { | |
758 | list_add_tail(&cmd->state_list, &dev->state_list); | |
759 | cmd->state_active = true; | |
c66ac9db | 760 | } |
cf572a96 | 761 | spin_unlock_irqrestore(&dev->execute_task_lock, flags); |
c66ac9db NB |
762 | } |
763 | ||
07bde79a | 764 | /* |
f147abb4 | 765 | * Handle QUEUE_FULL / -EAGAIN and -ENOMEM status |
07bde79a | 766 | */ |
7a6f0a1e CH |
767 | static void transport_write_pending_qf(struct se_cmd *cmd); |
768 | static void transport_complete_qf(struct se_cmd *cmd); | |
07bde79a | 769 | |
0fd97ccf | 770 | void target_qf_do_work(struct work_struct *work) |
07bde79a NB |
771 | { |
772 | struct se_device *dev = container_of(work, struct se_device, | |
773 | qf_work_queue); | |
bcac364a | 774 | LIST_HEAD(qf_cmd_list); |
07bde79a NB |
775 | struct se_cmd *cmd, *cmd_tmp; |
776 | ||
777 | spin_lock_irq(&dev->qf_cmd_lock); | |
bcac364a RD |
778 | list_splice_init(&dev->qf_cmd_list, &qf_cmd_list); |
779 | spin_unlock_irq(&dev->qf_cmd_lock); | |
07bde79a | 780 | |
bcac364a | 781 | list_for_each_entry_safe(cmd, cmd_tmp, &qf_cmd_list, se_qf_node) { |
07bde79a | 782 | list_del(&cmd->se_qf_node); |
33940d09 | 783 | atomic_dec_mb(&dev->dev_qf_count); |
07bde79a | 784 | |
6708bb27 | 785 | pr_debug("Processing %s cmd: %p QUEUE_FULL in work queue" |
07bde79a | 786 | " context: %s\n", cmd->se_tfo->get_fabric_name(), cmd, |
e057f533 | 787 | (cmd->t_state == TRANSPORT_COMPLETE_QF_OK) ? "COMPLETE_OK" : |
07bde79a NB |
788 | (cmd->t_state == TRANSPORT_COMPLETE_QF_WP) ? "WRITE_PENDING" |
789 | : "UNKNOWN"); | |
f7a5cc0b | 790 | |
7a6f0a1e CH |
791 | if (cmd->t_state == TRANSPORT_COMPLETE_QF_WP) |
792 | transport_write_pending_qf(cmd); | |
793 | else if (cmd->t_state == TRANSPORT_COMPLETE_QF_OK) | |
794 | transport_complete_qf(cmd); | |
07bde79a | 795 | } |
07bde79a NB |
796 | } |
797 | ||
c66ac9db NB |
798 | unsigned char *transport_dump_cmd_direction(struct se_cmd *cmd) |
799 | { | |
800 | switch (cmd->data_direction) { | |
801 | case DMA_NONE: | |
802 | return "NONE"; | |
803 | case DMA_FROM_DEVICE: | |
804 | return "READ"; | |
805 | case DMA_TO_DEVICE: | |
806 | return "WRITE"; | |
807 | case DMA_BIDIRECTIONAL: | |
808 | return "BIDI"; | |
809 | default: | |
810 | break; | |
811 | } | |
812 | ||
813 | return "UNKNOWN"; | |
814 | } | |
815 | ||
816 | void transport_dump_dev_state( | |
817 | struct se_device *dev, | |
818 | char *b, | |
819 | int *bl) | |
820 | { | |
821 | *bl += sprintf(b + *bl, "Status: "); | |
0fd97ccf | 822 | if (dev->export_count) |
c66ac9db | 823 | *bl += sprintf(b + *bl, "ACTIVATED"); |
0fd97ccf | 824 | else |
c66ac9db | 825 | *bl += sprintf(b + *bl, "DEACTIVATED"); |
c66ac9db | 826 | |
5f41a31d | 827 | *bl += sprintf(b + *bl, " Max Queue Depth: %d", dev->queue_depth); |
11e764bd | 828 | *bl += sprintf(b + *bl, " SectorSize: %u HwMaxSectors: %u\n", |
0fd97ccf CH |
829 | dev->dev_attrib.block_size, |
830 | dev->dev_attrib.hw_max_sectors); | |
c66ac9db NB |
831 | *bl += sprintf(b + *bl, " "); |
832 | } | |
833 | ||
c66ac9db NB |
834 | void transport_dump_vpd_proto_id( |
835 | struct t10_vpd *vpd, | |
836 | unsigned char *p_buf, | |
837 | int p_buf_len) | |
838 | { | |
839 | unsigned char buf[VPD_TMP_BUF_SIZE]; | |
840 | int len; | |
841 | ||
842 | memset(buf, 0, VPD_TMP_BUF_SIZE); | |
843 | len = sprintf(buf, "T10 VPD Protocol Identifier: "); | |
844 | ||
845 | switch (vpd->protocol_identifier) { | |
846 | case 0x00: | |
847 | sprintf(buf+len, "Fibre Channel\n"); | |
848 | break; | |
849 | case 0x10: | |
850 | sprintf(buf+len, "Parallel SCSI\n"); | |
851 | break; | |
852 | case 0x20: | |
853 | sprintf(buf+len, "SSA\n"); | |
854 | break; | |
855 | case 0x30: | |
856 | sprintf(buf+len, "IEEE 1394\n"); | |
857 | break; | |
858 | case 0x40: | |
859 | sprintf(buf+len, "SCSI Remote Direct Memory Access" | |
860 | " Protocol\n"); | |
861 | break; | |
862 | case 0x50: | |
863 | sprintf(buf+len, "Internet SCSI (iSCSI)\n"); | |
864 | break; | |
865 | case 0x60: | |
866 | sprintf(buf+len, "SAS Serial SCSI Protocol\n"); | |
867 | break; | |
868 | case 0x70: | |
869 | sprintf(buf+len, "Automation/Drive Interface Transport" | |
870 | " Protocol\n"); | |
871 | break; | |
872 | case 0x80: | |
873 | sprintf(buf+len, "AT Attachment Interface ATA/ATAPI\n"); | |
874 | break; | |
875 | default: | |
876 | sprintf(buf+len, "Unknown 0x%02x\n", | |
877 | vpd->protocol_identifier); | |
878 | break; | |
879 | } | |
880 | ||
881 | if (p_buf) | |
882 | strncpy(p_buf, buf, p_buf_len); | |
883 | else | |
6708bb27 | 884 | pr_debug("%s", buf); |
c66ac9db NB |
885 | } |
886 | ||
887 | void | |
888 | transport_set_vpd_proto_id(struct t10_vpd *vpd, unsigned char *page_83) | |
889 | { | |
890 | /* | |
891 | * Check if the Protocol Identifier Valid (PIV) bit is set.. | |
892 | * | |
893 | * from spc3r23.pdf section 7.5.1 | |
894 | */ | |
895 | if (page_83[1] & 0x80) { | |
896 | vpd->protocol_identifier = (page_83[0] & 0xf0); | |
897 | vpd->protocol_identifier_set = 1; | |
898 | transport_dump_vpd_proto_id(vpd, NULL, 0); | |
899 | } | |
900 | } | |
901 | EXPORT_SYMBOL(transport_set_vpd_proto_id); | |
902 | ||
903 | int transport_dump_vpd_assoc( | |
904 | struct t10_vpd *vpd, | |
905 | unsigned char *p_buf, | |
906 | int p_buf_len) | |
907 | { | |
908 | unsigned char buf[VPD_TMP_BUF_SIZE]; | |
e3d6f909 AG |
909 | int ret = 0; |
910 | int len; | |
c66ac9db NB |
911 | |
912 | memset(buf, 0, VPD_TMP_BUF_SIZE); | |
913 | len = sprintf(buf, "T10 VPD Identifier Association: "); | |
914 | ||
915 | switch (vpd->association) { | |
916 | case 0x00: | |
917 | sprintf(buf+len, "addressed logical unit\n"); | |
918 | break; | |
919 | case 0x10: | |
920 | sprintf(buf+len, "target port\n"); | |
921 | break; | |
922 | case 0x20: | |
923 | sprintf(buf+len, "SCSI target device\n"); | |
924 | break; | |
925 | default: | |
926 | sprintf(buf+len, "Unknown 0x%02x\n", vpd->association); | |
e3d6f909 | 927 | ret = -EINVAL; |
c66ac9db NB |
928 | break; |
929 | } | |
930 | ||
931 | if (p_buf) | |
932 | strncpy(p_buf, buf, p_buf_len); | |
933 | else | |
6708bb27 | 934 | pr_debug("%s", buf); |
c66ac9db NB |
935 | |
936 | return ret; | |
937 | } | |
938 | ||
939 | int transport_set_vpd_assoc(struct t10_vpd *vpd, unsigned char *page_83) | |
940 | { | |
941 | /* | |
942 | * The VPD identification association.. | |
943 | * | |
944 | * from spc3r23.pdf Section 7.6.3.1 Table 297 | |
945 | */ | |
946 | vpd->association = (page_83[1] & 0x30); | |
947 | return transport_dump_vpd_assoc(vpd, NULL, 0); | |
948 | } | |
949 | EXPORT_SYMBOL(transport_set_vpd_assoc); | |
950 | ||
951 | int transport_dump_vpd_ident_type( | |
952 | struct t10_vpd *vpd, | |
953 | unsigned char *p_buf, | |
954 | int p_buf_len) | |
955 | { | |
956 | unsigned char buf[VPD_TMP_BUF_SIZE]; | |
e3d6f909 AG |
957 | int ret = 0; |
958 | int len; | |
c66ac9db NB |
959 | |
960 | memset(buf, 0, VPD_TMP_BUF_SIZE); | |
961 | len = sprintf(buf, "T10 VPD Identifier Type: "); | |
962 | ||
963 | switch (vpd->device_identifier_type) { | |
964 | case 0x00: | |
965 | sprintf(buf+len, "Vendor specific\n"); | |
966 | break; | |
967 | case 0x01: | |
968 | sprintf(buf+len, "T10 Vendor ID based\n"); | |
969 | break; | |
970 | case 0x02: | |
971 | sprintf(buf+len, "EUI-64 based\n"); | |
972 | break; | |
973 | case 0x03: | |
974 | sprintf(buf+len, "NAA\n"); | |
975 | break; | |
976 | case 0x04: | |
977 | sprintf(buf+len, "Relative target port identifier\n"); | |
978 | break; | |
979 | case 0x08: | |
980 | sprintf(buf+len, "SCSI name string\n"); | |
981 | break; | |
982 | default: | |
983 | sprintf(buf+len, "Unsupported: 0x%02x\n", | |
984 | vpd->device_identifier_type); | |
e3d6f909 | 985 | ret = -EINVAL; |
c66ac9db NB |
986 | break; |
987 | } | |
988 | ||
e3d6f909 AG |
989 | if (p_buf) { |
990 | if (p_buf_len < strlen(buf)+1) | |
991 | return -EINVAL; | |
c66ac9db | 992 | strncpy(p_buf, buf, p_buf_len); |
e3d6f909 | 993 | } else { |
6708bb27 | 994 | pr_debug("%s", buf); |
e3d6f909 | 995 | } |
c66ac9db NB |
996 | |
997 | return ret; | |
998 | } | |
999 | ||
1000 | int transport_set_vpd_ident_type(struct t10_vpd *vpd, unsigned char *page_83) | |
1001 | { | |
1002 | /* | |
1003 | * The VPD identifier type.. | |
1004 | * | |
1005 | * from spc3r23.pdf Section 7.6.3.1 Table 298 | |
1006 | */ | |
1007 | vpd->device_identifier_type = (page_83[1] & 0x0f); | |
1008 | return transport_dump_vpd_ident_type(vpd, NULL, 0); | |
1009 | } | |
1010 | EXPORT_SYMBOL(transport_set_vpd_ident_type); | |
1011 | ||
1012 | int transport_dump_vpd_ident( | |
1013 | struct t10_vpd *vpd, | |
1014 | unsigned char *p_buf, | |
1015 | int p_buf_len) | |
1016 | { | |
1017 | unsigned char buf[VPD_TMP_BUF_SIZE]; | |
1018 | int ret = 0; | |
1019 | ||
1020 | memset(buf, 0, VPD_TMP_BUF_SIZE); | |
1021 | ||
1022 | switch (vpd->device_identifier_code_set) { | |
1023 | case 0x01: /* Binary */ | |
703d641d DC |
1024 | snprintf(buf, sizeof(buf), |
1025 | "T10 VPD Binary Device Identifier: %s\n", | |
c66ac9db NB |
1026 | &vpd->device_identifier[0]); |
1027 | break; | |
1028 | case 0x02: /* ASCII */ | |
703d641d DC |
1029 | snprintf(buf, sizeof(buf), |
1030 | "T10 VPD ASCII Device Identifier: %s\n", | |
c66ac9db NB |
1031 | &vpd->device_identifier[0]); |
1032 | break; | |
1033 | case 0x03: /* UTF-8 */ | |
703d641d DC |
1034 | snprintf(buf, sizeof(buf), |
1035 | "T10 VPD UTF-8 Device Identifier: %s\n", | |
c66ac9db NB |
1036 | &vpd->device_identifier[0]); |
1037 | break; | |
1038 | default: | |
1039 | sprintf(buf, "T10 VPD Device Identifier encoding unsupported:" | |
1040 | " 0x%02x", vpd->device_identifier_code_set); | |
e3d6f909 | 1041 | ret = -EINVAL; |
c66ac9db NB |
1042 | break; |
1043 | } | |
1044 | ||
1045 | if (p_buf) | |
1046 | strncpy(p_buf, buf, p_buf_len); | |
1047 | else | |
6708bb27 | 1048 | pr_debug("%s", buf); |
c66ac9db NB |
1049 | |
1050 | return ret; | |
1051 | } | |
1052 | ||
1053 | int | |
1054 | transport_set_vpd_ident(struct t10_vpd *vpd, unsigned char *page_83) | |
1055 | { | |
1056 | static const char hex_str[] = "0123456789abcdef"; | |
35d1efe8 | 1057 | int j = 0, i = 4; /* offset to start of the identifier */ |
c66ac9db NB |
1058 | |
1059 | /* | |
1060 | * The VPD Code Set (encoding) | |
1061 | * | |
1062 | * from spc3r23.pdf Section 7.6.3.1 Table 296 | |
1063 | */ | |
1064 | vpd->device_identifier_code_set = (page_83[0] & 0x0f); | |
1065 | switch (vpd->device_identifier_code_set) { | |
1066 | case 0x01: /* Binary */ | |
1067 | vpd->device_identifier[j++] = | |
1068 | hex_str[vpd->device_identifier_type]; | |
1069 | while (i < (4 + page_83[3])) { | |
1070 | vpd->device_identifier[j++] = | |
1071 | hex_str[(page_83[i] & 0xf0) >> 4]; | |
1072 | vpd->device_identifier[j++] = | |
1073 | hex_str[page_83[i] & 0x0f]; | |
1074 | i++; | |
1075 | } | |
1076 | break; | |
1077 | case 0x02: /* ASCII */ | |
1078 | case 0x03: /* UTF-8 */ | |
1079 | while (i < (4 + page_83[3])) | |
1080 | vpd->device_identifier[j++] = page_83[i++]; | |
1081 | break; | |
1082 | default: | |
1083 | break; | |
1084 | } | |
1085 | ||
1086 | return transport_dump_vpd_ident(vpd, NULL, 0); | |
1087 | } | |
1088 | EXPORT_SYMBOL(transport_set_vpd_ident); | |
1089 | ||
de103c93 CH |
1090 | sense_reason_t |
1091 | target_cmd_size_check(struct se_cmd *cmd, unsigned int size) | |
9b3b8041 CH |
1092 | { |
1093 | struct se_device *dev = cmd->se_dev; | |
1094 | ||
1095 | if (cmd->unknown_data_length) { | |
1096 | cmd->data_length = size; | |
1097 | } else if (size != cmd->data_length) { | |
1098 | pr_warn("TARGET_CORE[%s]: Expected Transfer Length:" | |
1099 | " %u does not match SCSI CDB Length: %u for SAM Opcode:" | |
1100 | " 0x%02x\n", cmd->se_tfo->get_fabric_name(), | |
1101 | cmd->data_length, size, cmd->t_task_cdb[0]); | |
1102 | ||
9b3b8041 CH |
1103 | if (cmd->data_direction == DMA_TO_DEVICE) { |
1104 | pr_err("Rejecting underflow/overflow" | |
1105 | " WRITE data\n"); | |
de103c93 | 1106 | return TCM_INVALID_CDB_FIELD; |
9b3b8041 CH |
1107 | } |
1108 | /* | |
1109 | * Reject READ_* or WRITE_* with overflow/underflow for | |
1110 | * type SCF_SCSI_DATA_CDB. | |
1111 | */ | |
0fd97ccf | 1112 | if (dev->dev_attrib.block_size != 512) { |
9b3b8041 CH |
1113 | pr_err("Failing OVERFLOW/UNDERFLOW for LBA op" |
1114 | " CDB on non 512-byte sector setup subsystem" | |
1115 | " plugin: %s\n", dev->transport->name); | |
1116 | /* Returns CHECK_CONDITION + INVALID_CDB_FIELD */ | |
de103c93 | 1117 | return TCM_INVALID_CDB_FIELD; |
9b3b8041 | 1118 | } |
4c054ba6 NB |
1119 | /* |
1120 | * For the overflow case keep the existing fabric provided | |
1121 | * ->data_length. Otherwise for the underflow case, reset | |
1122 | * ->data_length to the smaller SCSI expected data transfer | |
1123 | * length. | |
1124 | */ | |
9b3b8041 CH |
1125 | if (size > cmd->data_length) { |
1126 | cmd->se_cmd_flags |= SCF_OVERFLOW_BIT; | |
1127 | cmd->residual_count = (size - cmd->data_length); | |
1128 | } else { | |
1129 | cmd->se_cmd_flags |= SCF_UNDERFLOW_BIT; | |
1130 | cmd->residual_count = (cmd->data_length - size); | |
4c054ba6 | 1131 | cmd->data_length = size; |
9b3b8041 | 1132 | } |
9b3b8041 CH |
1133 | } |
1134 | ||
1135 | return 0; | |
1136 | ||
9b3b8041 CH |
1137 | } |
1138 | ||
c66ac9db NB |
1139 | /* |
1140 | * Used by fabric modules containing a local struct se_cmd within their | |
1141 | * fabric dependent per I/O descriptor. | |
1142 | */ | |
1143 | void transport_init_se_cmd( | |
1144 | struct se_cmd *cmd, | |
1145 | struct target_core_fabric_ops *tfo, | |
1146 | struct se_session *se_sess, | |
1147 | u32 data_length, | |
1148 | int data_direction, | |
1149 | int task_attr, | |
1150 | unsigned char *sense_buffer) | |
1151 | { | |
5951146d | 1152 | INIT_LIST_HEAD(&cmd->se_delayed_node); |
07bde79a | 1153 | INIT_LIST_HEAD(&cmd->se_qf_node); |
a17f091d | 1154 | INIT_LIST_HEAD(&cmd->se_cmd_list); |
cf572a96 | 1155 | INIT_LIST_HEAD(&cmd->state_list); |
a1d8b49a | 1156 | init_completion(&cmd->t_transport_stop_comp); |
a17f091d | 1157 | init_completion(&cmd->cmd_wait_comp); |
cf572a96 | 1158 | init_completion(&cmd->task_stop_comp); |
a1d8b49a | 1159 | spin_lock_init(&cmd->t_state_lock); |
1e1110c4 | 1160 | kref_init(&cmd->cmd_kref); |
7d680f3b | 1161 | cmd->transport_state = CMD_T_DEV_ACTIVE; |
c66ac9db NB |
1162 | |
1163 | cmd->se_tfo = tfo; | |
1164 | cmd->se_sess = se_sess; | |
1165 | cmd->data_length = data_length; | |
1166 | cmd->data_direction = data_direction; | |
1167 | cmd->sam_task_attr = task_attr; | |
1168 | cmd->sense_buffer = sense_buffer; | |
cf572a96 CH |
1169 | |
1170 | cmd->state_active = false; | |
c66ac9db NB |
1171 | } |
1172 | EXPORT_SYMBOL(transport_init_se_cmd); | |
1173 | ||
de103c93 CH |
1174 | static sense_reason_t |
1175 | transport_check_alloc_task_attr(struct se_cmd *cmd) | |
c66ac9db | 1176 | { |
019c4ca6 CH |
1177 | struct se_device *dev = cmd->se_dev; |
1178 | ||
c66ac9db NB |
1179 | /* |
1180 | * Check if SAM Task Attribute emulation is enabled for this | |
1181 | * struct se_device storage object | |
1182 | */ | |
019c4ca6 | 1183 | if (dev->transport->transport_type == TRANSPORT_PLUGIN_PHBA_PDEV) |
c66ac9db NB |
1184 | return 0; |
1185 | ||
68d81f40 | 1186 | if (cmd->sam_task_attr == TCM_ACA_TAG) { |
6708bb27 | 1187 | pr_debug("SAM Task Attribute ACA" |
c66ac9db | 1188 | " emulation is not supported\n"); |
de103c93 | 1189 | return TCM_INVALID_CDB_FIELD; |
c66ac9db NB |
1190 | } |
1191 | /* | |
1192 | * Used to determine when ORDERED commands should go from | |
1193 | * Dormant to Active status. | |
1194 | */ | |
019c4ca6 | 1195 | cmd->se_ordered_id = atomic_inc_return(&dev->dev_ordered_id); |
6708bb27 | 1196 | pr_debug("Allocated se_ordered_id: %u for Task Attr: 0x%02x on %s\n", |
c66ac9db | 1197 | cmd->se_ordered_id, cmd->sam_task_attr, |
019c4ca6 | 1198 | dev->transport->name); |
c66ac9db NB |
1199 | return 0; |
1200 | } | |
1201 | ||
de103c93 CH |
1202 | sense_reason_t |
1203 | target_setup_cmd_from_cdb(struct se_cmd *cmd, unsigned char *cdb) | |
c66ac9db | 1204 | { |
0fd97ccf | 1205 | struct se_device *dev = cmd->se_dev; |
de103c93 | 1206 | sense_reason_t ret; |
c66ac9db | 1207 | |
c66ac9db NB |
1208 | /* |
1209 | * Ensure that the received CDB is less than the max (252 + 8) bytes | |
1210 | * for VARIABLE_LENGTH_CMD | |
1211 | */ | |
1212 | if (scsi_command_size(cdb) > SCSI_MAX_VARLEN_CDB_SIZE) { | |
6708bb27 | 1213 | pr_err("Received SCSI CDB with command_size: %d that" |
c66ac9db NB |
1214 | " exceeds SCSI_MAX_VARLEN_CDB_SIZE: %d\n", |
1215 | scsi_command_size(cdb), SCSI_MAX_VARLEN_CDB_SIZE); | |
de103c93 | 1216 | return TCM_INVALID_CDB_FIELD; |
c66ac9db NB |
1217 | } |
1218 | /* | |
1219 | * If the received CDB is larger than TCM_MAX_COMMAND_SIZE, | |
1220 | * allocate the additional extended CDB buffer now.. Otherwise | |
1221 | * setup the pointer from __t_task_cdb to t_task_cdb. | |
1222 | */ | |
a1d8b49a AG |
1223 | if (scsi_command_size(cdb) > sizeof(cmd->__t_task_cdb)) { |
1224 | cmd->t_task_cdb = kzalloc(scsi_command_size(cdb), | |
c66ac9db | 1225 | GFP_KERNEL); |
6708bb27 AG |
1226 | if (!cmd->t_task_cdb) { |
1227 | pr_err("Unable to allocate cmd->t_task_cdb" | |
a1d8b49a | 1228 | " %u > sizeof(cmd->__t_task_cdb): %lu ops\n", |
c66ac9db | 1229 | scsi_command_size(cdb), |
a1d8b49a | 1230 | (unsigned long)sizeof(cmd->__t_task_cdb)); |
de103c93 | 1231 | return TCM_OUT_OF_RESOURCES; |
c66ac9db NB |
1232 | } |
1233 | } else | |
a1d8b49a | 1234 | cmd->t_task_cdb = &cmd->__t_task_cdb[0]; |
c66ac9db | 1235 | /* |
a1d8b49a | 1236 | * Copy the original CDB into cmd-> |
c66ac9db | 1237 | */ |
a1d8b49a | 1238 | memcpy(cmd->t_task_cdb, cdb, scsi_command_size(cdb)); |
cb4f4d3c | 1239 | |
e5c0d6ad RD |
1240 | trace_target_sequencer_start(cmd); |
1241 | ||
cb4f4d3c CH |
1242 | /* |
1243 | * Check for an existing UNIT ATTENTION condition | |
1244 | */ | |
de103c93 CH |
1245 | ret = target_scsi3_ua_check(cmd); |
1246 | if (ret) | |
1247 | return ret; | |
cb4f4d3c | 1248 | |
c87fbd56 | 1249 | ret = target_alua_state_check(cmd); |
de103c93 CH |
1250 | if (ret) |
1251 | return ret; | |
cb4f4d3c | 1252 | |
d977f437 | 1253 | ret = target_check_reservation(cmd); |
f85eda8d NB |
1254 | if (ret) { |
1255 | cmd->scsi_status = SAM_STAT_RESERVATION_CONFLICT; | |
d977f437 | 1256 | return ret; |
f85eda8d | 1257 | } |
cb4f4d3c | 1258 | |
0fd97ccf | 1259 | ret = dev->transport->parse_cdb(cmd); |
de103c93 CH |
1260 | if (ret) |
1261 | return ret; | |
1262 | ||
1263 | ret = transport_check_alloc_task_attr(cmd); | |
1264 | if (ret) | |
c66ac9db | 1265 | return ret; |
cb4f4d3c | 1266 | |
cb4f4d3c | 1267 | cmd->se_cmd_flags |= SCF_SUPPORTED_SAM_OPCODE; |
cb4f4d3c | 1268 | |
c66ac9db NB |
1269 | spin_lock(&cmd->se_lun->lun_sep_lock); |
1270 | if (cmd->se_lun->lun_sep) | |
1271 | cmd->se_lun->lun_sep->sep_stats.cmd_pdus++; | |
1272 | spin_unlock(&cmd->se_lun->lun_sep_lock); | |
1273 | return 0; | |
1274 | } | |
a12f41f8 | 1275 | EXPORT_SYMBOL(target_setup_cmd_from_cdb); |
c66ac9db | 1276 | |
695434e1 NB |
1277 | /* |
1278 | * Used by fabric module frontends to queue tasks directly. | |
1279 | * Many only be used from process context only | |
1280 | */ | |
1281 | int transport_handle_cdb_direct( | |
1282 | struct se_cmd *cmd) | |
1283 | { | |
de103c93 | 1284 | sense_reason_t ret; |
dd8ae59d | 1285 | |
695434e1 NB |
1286 | if (!cmd->se_lun) { |
1287 | dump_stack(); | |
6708bb27 | 1288 | pr_err("cmd->se_lun is NULL\n"); |
695434e1 NB |
1289 | return -EINVAL; |
1290 | } | |
1291 | if (in_interrupt()) { | |
1292 | dump_stack(); | |
6708bb27 | 1293 | pr_err("transport_generic_handle_cdb cannot be called" |
695434e1 NB |
1294 | " from interrupt context\n"); |
1295 | return -EINVAL; | |
1296 | } | |
dd8ae59d | 1297 | /* |
af877292 CH |
1298 | * Set TRANSPORT_NEW_CMD state and CMD_T_ACTIVE to ensure that |
1299 | * outstanding descriptors are handled correctly during shutdown via | |
1300 | * transport_wait_for_tasks() | |
dd8ae59d NB |
1301 | * |
1302 | * Also, we don't take cmd->t_state_lock here as we only expect | |
1303 | * this to be called for initial descriptor submission. | |
1304 | */ | |
1305 | cmd->t_state = TRANSPORT_NEW_CMD; | |
7d680f3b CH |
1306 | cmd->transport_state |= CMD_T_ACTIVE; |
1307 | ||
dd8ae59d NB |
1308 | /* |
1309 | * transport_generic_new_cmd() is already handling QUEUE_FULL, | |
1310 | * so follow TRANSPORT_NEW_CMD processing thread context usage | |
1311 | * and call transport_generic_request_failure() if necessary.. | |
1312 | */ | |
1313 | ret = transport_generic_new_cmd(cmd); | |
de103c93 CH |
1314 | if (ret) |
1315 | transport_generic_request_failure(cmd, ret); | |
dd8ae59d | 1316 | return 0; |
695434e1 NB |
1317 | } |
1318 | EXPORT_SYMBOL(transport_handle_cdb_direct); | |
1319 | ||
c5ff8d6b | 1320 | sense_reason_t |
de103c93 CH |
1321 | transport_generic_map_mem_to_cmd(struct se_cmd *cmd, struct scatterlist *sgl, |
1322 | u32 sgl_count, struct scatterlist *sgl_bidi, u32 sgl_bidi_count) | |
1323 | { | |
1324 | if (!sgl || !sgl_count) | |
1325 | return 0; | |
1326 | ||
1327 | /* | |
1328 | * Reject SCSI data overflow with map_mem_to_cmd() as incoming | |
1329 | * scatterlists already have been set to follow what the fabric | |
1330 | * passes for the original expected data transfer length. | |
1331 | */ | |
1332 | if (cmd->se_cmd_flags & SCF_OVERFLOW_BIT) { | |
1333 | pr_warn("Rejecting SCSI DATA overflow for fabric using" | |
1334 | " SCF_PASSTHROUGH_SG_TO_MEM_NOALLOC\n"); | |
1335 | return TCM_INVALID_CDB_FIELD; | |
1336 | } | |
1337 | ||
1338 | cmd->t_data_sg = sgl; | |
1339 | cmd->t_data_nents = sgl_count; | |
1340 | ||
1341 | if (sgl_bidi && sgl_bidi_count) { | |
1342 | cmd->t_bidi_data_sg = sgl_bidi; | |
1343 | cmd->t_bidi_data_nents = sgl_bidi_count; | |
1344 | } | |
1345 | cmd->se_cmd_flags |= SCF_PASSTHROUGH_SG_TO_MEM_NOALLOC; | |
1346 | return 0; | |
1347 | } | |
1348 | ||
a026757f NB |
1349 | /* |
1350 | * target_submit_cmd_map_sgls - lookup unpacked lun and submit uninitialized | |
1351 | * se_cmd + use pre-allocated SGL memory. | |
a6360785 NB |
1352 | * |
1353 | * @se_cmd: command descriptor to submit | |
1354 | * @se_sess: associated se_sess for endpoint | |
1355 | * @cdb: pointer to SCSI CDB | |
1356 | * @sense: pointer to SCSI sense buffer | |
1357 | * @unpacked_lun: unpacked LUN to reference for struct se_lun | |
1358 | * @data_length: fabric expected data transfer length | |
1359 | * @task_addr: SAM task attribute | |
1360 | * @data_dir: DMA data direction | |
1361 | * @flags: flags for command submission from target_sc_flags_tables | |
a026757f NB |
1362 | * @sgl: struct scatterlist memory for unidirectional mapping |
1363 | * @sgl_count: scatterlist count for unidirectional mapping | |
1364 | * @sgl_bidi: struct scatterlist memory for bidirectional READ mapping | |
1365 | * @sgl_bidi_count: scatterlist count for bidirectional READ mapping | |
def2b339 NB |
1366 | * @sgl_prot: struct scatterlist memory protection information |
1367 | * @sgl_prot_count: scatterlist count for protection information | |
a6360785 | 1368 | * |
d6dfc868 RD |
1369 | * Returns non zero to signal active I/O shutdown failure. All other |
1370 | * setup exceptions will be returned as a SCSI CHECK_CONDITION response, | |
1371 | * but still return zero here. | |
1372 | * | |
a6360785 NB |
1373 | * This may only be called from process context, and also currently |
1374 | * assumes internal allocation of fabric payload buffer by target-core. | |
a026757f NB |
1375 | */ |
1376 | int target_submit_cmd_map_sgls(struct se_cmd *se_cmd, struct se_session *se_sess, | |
a6360785 | 1377 | unsigned char *cdb, unsigned char *sense, u32 unpacked_lun, |
a026757f NB |
1378 | u32 data_length, int task_attr, int data_dir, int flags, |
1379 | struct scatterlist *sgl, u32 sgl_count, | |
def2b339 NB |
1380 | struct scatterlist *sgl_bidi, u32 sgl_bidi_count, |
1381 | struct scatterlist *sgl_prot, u32 sgl_prot_count) | |
a6360785 NB |
1382 | { |
1383 | struct se_portal_group *se_tpg; | |
de103c93 CH |
1384 | sense_reason_t rc; |
1385 | int ret; | |
a6360785 NB |
1386 | |
1387 | se_tpg = se_sess->se_tpg; | |
1388 | BUG_ON(!se_tpg); | |
1389 | BUG_ON(se_cmd->se_tfo || se_cmd->se_sess); | |
1390 | BUG_ON(in_interrupt()); | |
1391 | /* | |
1392 | * Initialize se_cmd for target operation. From this point | |
1393 | * exceptions are handled by sending exception status via | |
1394 | * target_core_fabric_ops->queue_status() callback | |
1395 | */ | |
1396 | transport_init_se_cmd(se_cmd, se_tpg->se_tpg_tfo, se_sess, | |
1397 | data_length, data_dir, task_attr, sense); | |
b0d79946 SAS |
1398 | if (flags & TARGET_SCF_UNKNOWN_SIZE) |
1399 | se_cmd->unknown_data_length = 1; | |
a6360785 NB |
1400 | /* |
1401 | * Obtain struct se_cmd->cmd_kref reference and add new cmd to | |
1402 | * se_sess->sess_cmd_list. A second kref_get here is necessary | |
1403 | * for fabrics using TARGET_SCF_ACK_KREF that expect a second | |
1404 | * kref_put() to happen during fabric packet acknowledgement. | |
1405 | */ | |
de103c93 CH |
1406 | ret = target_get_sess_cmd(se_sess, se_cmd, (flags & TARGET_SCF_ACK_KREF)); |
1407 | if (ret) | |
1408 | return ret; | |
a6360785 NB |
1409 | /* |
1410 | * Signal bidirectional data payloads to target-core | |
1411 | */ | |
1412 | if (flags & TARGET_SCF_BIDI_OP) | |
1413 | se_cmd->se_cmd_flags |= SCF_BIDI; | |
1414 | /* | |
1415 | * Locate se_lun pointer and attach it to struct se_cmd | |
1416 | */ | |
de103c93 CH |
1417 | rc = transport_lookup_cmd_lun(se_cmd, unpacked_lun); |
1418 | if (rc) { | |
1419 | transport_send_check_condition_and_sense(se_cmd, rc, 0); | |
735703ca | 1420 | target_put_sess_cmd(se_sess, se_cmd); |
d6dfc868 | 1421 | return 0; |
735703ca | 1422 | } |
b5b8e298 SG |
1423 | |
1424 | rc = target_setup_cmd_from_cdb(se_cmd, cdb); | |
1425 | if (rc != 0) { | |
1426 | transport_generic_request_failure(se_cmd, rc); | |
1427 | return 0; | |
1428 | } | |
1429 | ||
def2b339 NB |
1430 | /* |
1431 | * Save pointers for SGLs containing protection information, | |
1432 | * if present. | |
1433 | */ | |
1434 | if (sgl_prot_count) { | |
1435 | se_cmd->t_prot_sg = sgl_prot; | |
1436 | se_cmd->t_prot_nents = sgl_prot_count; | |
1437 | } | |
d6e0175c | 1438 | |
a026757f NB |
1439 | /* |
1440 | * When a non zero sgl_count has been passed perform SGL passthrough | |
1441 | * mapping for pre-allocated fabric memory instead of having target | |
1442 | * core perform an internal SGL allocation.. | |
1443 | */ | |
1444 | if (sgl_count != 0) { | |
1445 | BUG_ON(!sgl); | |
1446 | ||
944981c7 NB |
1447 | /* |
1448 | * A work-around for tcm_loop as some userspace code via | |
1449 | * scsi-generic do not memset their associated read buffers, | |
1450 | * so go ahead and do that here for type non-data CDBs. Also | |
1451 | * note that this is currently guaranteed to be a single SGL | |
1452 | * for this case by target core in target_setup_cmd_from_cdb() | |
1453 | * -> transport_generic_cmd_sequencer(). | |
1454 | */ | |
1455 | if (!(se_cmd->se_cmd_flags & SCF_SCSI_DATA_CDB) && | |
1456 | se_cmd->data_direction == DMA_FROM_DEVICE) { | |
1457 | unsigned char *buf = NULL; | |
1458 | ||
1459 | if (sgl) | |
1460 | buf = kmap(sg_page(sgl)) + sgl->offset; | |
1461 | ||
1462 | if (buf) { | |
1463 | memset(buf, 0, sgl->length); | |
1464 | kunmap(sg_page(sgl)); | |
1465 | } | |
1466 | } | |
1467 | ||
a026757f NB |
1468 | rc = transport_generic_map_mem_to_cmd(se_cmd, sgl, sgl_count, |
1469 | sgl_bidi, sgl_bidi_count); | |
1470 | if (rc != 0) { | |
de103c93 | 1471 | transport_generic_request_failure(se_cmd, rc); |
a026757f NB |
1472 | return 0; |
1473 | } | |
1474 | } | |
def2b339 | 1475 | |
11e319ed AG |
1476 | /* |
1477 | * Check if we need to delay processing because of ALUA | |
1478 | * Active/NonOptimized primary access state.. | |
1479 | */ | |
1480 | core_alua_check_nonop_delay(se_cmd); | |
1481 | ||
a6360785 | 1482 | transport_handle_cdb_direct(se_cmd); |
d6dfc868 | 1483 | return 0; |
a6360785 | 1484 | } |
a026757f NB |
1485 | EXPORT_SYMBOL(target_submit_cmd_map_sgls); |
1486 | ||
1487 | /* | |
1488 | * target_submit_cmd - lookup unpacked lun and submit uninitialized se_cmd | |
1489 | * | |
1490 | * @se_cmd: command descriptor to submit | |
1491 | * @se_sess: associated se_sess for endpoint | |
1492 | * @cdb: pointer to SCSI CDB | |
1493 | * @sense: pointer to SCSI sense buffer | |
1494 | * @unpacked_lun: unpacked LUN to reference for struct se_lun | |
1495 | * @data_length: fabric expected data transfer length | |
1496 | * @task_addr: SAM task attribute | |
1497 | * @data_dir: DMA data direction | |
1498 | * @flags: flags for command submission from target_sc_flags_tables | |
1499 | * | |
1500 | * Returns non zero to signal active I/O shutdown failure. All other | |
1501 | * setup exceptions will be returned as a SCSI CHECK_CONDITION response, | |
1502 | * but still return zero here. | |
1503 | * | |
1504 | * This may only be called from process context, and also currently | |
1505 | * assumes internal allocation of fabric payload buffer by target-core. | |
1506 | * | |
1507 | * It also assumes interal target core SGL memory allocation. | |
1508 | */ | |
1509 | int target_submit_cmd(struct se_cmd *se_cmd, struct se_session *se_sess, | |
1510 | unsigned char *cdb, unsigned char *sense, u32 unpacked_lun, | |
1511 | u32 data_length, int task_attr, int data_dir, int flags) | |
1512 | { | |
1513 | return target_submit_cmd_map_sgls(se_cmd, se_sess, cdb, sense, | |
1514 | unpacked_lun, data_length, task_attr, data_dir, | |
def2b339 | 1515 | flags, NULL, 0, NULL, 0, NULL, 0); |
a026757f | 1516 | } |
a6360785 NB |
1517 | EXPORT_SYMBOL(target_submit_cmd); |
1518 | ||
9f0d05c2 NB |
1519 | static void target_complete_tmr_failure(struct work_struct *work) |
1520 | { | |
1521 | struct se_cmd *se_cmd = container_of(work, struct se_cmd, work); | |
1522 | ||
1523 | se_cmd->se_tmr_req->response = TMR_LUN_DOES_NOT_EXIST; | |
1524 | se_cmd->se_tfo->queue_tm_rsp(se_cmd); | |
5a3b6fc0 RD |
1525 | |
1526 | transport_cmd_check_stop_to_fabric(se_cmd); | |
9f0d05c2 NB |
1527 | } |
1528 | ||
ea98d7f9 AG |
1529 | /** |
1530 | * target_submit_tmr - lookup unpacked lun and submit uninitialized se_cmd | |
1531 | * for TMR CDBs | |
1532 | * | |
1533 | * @se_cmd: command descriptor to submit | |
1534 | * @se_sess: associated se_sess for endpoint | |
1535 | * @sense: pointer to SCSI sense buffer | |
1536 | * @unpacked_lun: unpacked LUN to reference for struct se_lun | |
1537 | * @fabric_context: fabric context for TMR req | |
1538 | * @tm_type: Type of TM request | |
c0974f89 NB |
1539 | * @gfp: gfp type for caller |
1540 | * @tag: referenced task tag for TMR_ABORT_TASK | |
c7042cae | 1541 | * @flags: submit cmd flags |
ea98d7f9 AG |
1542 | * |
1543 | * Callable from all contexts. | |
1544 | **/ | |
1545 | ||
c7042cae | 1546 | int target_submit_tmr(struct se_cmd *se_cmd, struct se_session *se_sess, |
ea98d7f9 | 1547 | unsigned char *sense, u32 unpacked_lun, |
c0974f89 NB |
1548 | void *fabric_tmr_ptr, unsigned char tm_type, |
1549 | gfp_t gfp, unsigned int tag, int flags) | |
ea98d7f9 AG |
1550 | { |
1551 | struct se_portal_group *se_tpg; | |
1552 | int ret; | |
1553 | ||
1554 | se_tpg = se_sess->se_tpg; | |
1555 | BUG_ON(!se_tpg); | |
1556 | ||
1557 | transport_init_se_cmd(se_cmd, se_tpg->se_tpg_tfo, se_sess, | |
68d81f40 | 1558 | 0, DMA_NONE, TCM_SIMPLE_TAG, sense); |
c7042cae NB |
1559 | /* |
1560 | * FIXME: Currently expect caller to handle se_cmd->se_tmr_req | |
1561 | * allocation failure. | |
1562 | */ | |
c0974f89 | 1563 | ret = core_tmr_alloc_req(se_cmd, fabric_tmr_ptr, tm_type, gfp); |
c7042cae NB |
1564 | if (ret < 0) |
1565 | return -ENOMEM; | |
ea98d7f9 | 1566 | |
c0974f89 NB |
1567 | if (tm_type == TMR_ABORT_TASK) |
1568 | se_cmd->se_tmr_req->ref_task_tag = tag; | |
1569 | ||
ea98d7f9 | 1570 | /* See target_submit_cmd for commentary */ |
bc187ea6 RD |
1571 | ret = target_get_sess_cmd(se_sess, se_cmd, (flags & TARGET_SCF_ACK_KREF)); |
1572 | if (ret) { | |
1573 | core_tmr_release_req(se_cmd->se_tmr_req); | |
1574 | return ret; | |
1575 | } | |
ea98d7f9 | 1576 | |
ea98d7f9 AG |
1577 | ret = transport_lookup_tmr_lun(se_cmd, unpacked_lun); |
1578 | if (ret) { | |
9f0d05c2 NB |
1579 | /* |
1580 | * For callback during failure handling, push this work off | |
1581 | * to process context with TMR_LUN_DOES_NOT_EXIST status. | |
1582 | */ | |
1583 | INIT_WORK(&se_cmd->work, target_complete_tmr_failure); | |
1584 | schedule_work(&se_cmd->work); | |
c7042cae | 1585 | return 0; |
ea98d7f9 AG |
1586 | } |
1587 | transport_generic_handle_tmr(se_cmd); | |
c7042cae | 1588 | return 0; |
ea98d7f9 AG |
1589 | } |
1590 | EXPORT_SYMBOL(target_submit_tmr); | |
1591 | ||
cdbb70bb | 1592 | /* |
cf572a96 | 1593 | * If the cmd is active, request it to be stopped and sleep until it |
cdbb70bb CH |
1594 | * has completed. |
1595 | */ | |
cf572a96 | 1596 | bool target_stop_cmd(struct se_cmd *cmd, unsigned long *flags) |
cdbb70bb | 1597 | { |
cdbb70bb CH |
1598 | bool was_active = false; |
1599 | ||
cf572a96 CH |
1600 | if (cmd->transport_state & CMD_T_BUSY) { |
1601 | cmd->transport_state |= CMD_T_REQUEST_STOP; | |
cdbb70bb CH |
1602 | spin_unlock_irqrestore(&cmd->t_state_lock, *flags); |
1603 | ||
cf572a96 CH |
1604 | pr_debug("cmd %p waiting to complete\n", cmd); |
1605 | wait_for_completion(&cmd->task_stop_comp); | |
1606 | pr_debug("cmd %p stopped successfully\n", cmd); | |
cdbb70bb CH |
1607 | |
1608 | spin_lock_irqsave(&cmd->t_state_lock, *flags); | |
cf572a96 CH |
1609 | cmd->transport_state &= ~CMD_T_REQUEST_STOP; |
1610 | cmd->transport_state &= ~CMD_T_BUSY; | |
cdbb70bb CH |
1611 | was_active = true; |
1612 | } | |
1613 | ||
cdbb70bb CH |
1614 | return was_active; |
1615 | } | |
1616 | ||
c66ac9db NB |
1617 | /* |
1618 | * Handle SAM-esque emulation for generic transport request failures. | |
1619 | */ | |
de103c93 CH |
1620 | void transport_generic_request_failure(struct se_cmd *cmd, |
1621 | sense_reason_t sense_reason) | |
c66ac9db | 1622 | { |
07bde79a NB |
1623 | int ret = 0; |
1624 | ||
6708bb27 | 1625 | pr_debug("-----[ Storage Engine Exception for cmd: %p ITT: 0x%08x" |
e3d6f909 | 1626 | " CDB: 0x%02x\n", cmd, cmd->se_tfo->get_task_tag(cmd), |
a1d8b49a | 1627 | cmd->t_task_cdb[0]); |
de103c93 | 1628 | pr_debug("-----[ i_state: %d t_state: %d sense_reason: %d\n", |
e3d6f909 | 1629 | cmd->se_tfo->get_cmd_state(cmd), |
de103c93 | 1630 | cmd->t_state, sense_reason); |
d43d6aea | 1631 | pr_debug("-----[ CMD_T_ACTIVE: %d CMD_T_STOP: %d CMD_T_SENT: %d\n", |
7d680f3b CH |
1632 | (cmd->transport_state & CMD_T_ACTIVE) != 0, |
1633 | (cmd->transport_state & CMD_T_STOP) != 0, | |
1634 | (cmd->transport_state & CMD_T_SENT) != 0); | |
c66ac9db | 1635 | |
c66ac9db NB |
1636 | /* |
1637 | * For SAM Task Attribute emulation for failed struct se_cmd | |
1638 | */ | |
019c4ca6 | 1639 | transport_complete_task_attr(cmd); |
cf6d1f09 NB |
1640 | /* |
1641 | * Handle special case for COMPARE_AND_WRITE failure, where the | |
1642 | * callback is expected to drop the per device ->caw_mutex. | |
1643 | */ | |
1644 | if ((cmd->se_cmd_flags & SCF_COMPARE_AND_WRITE) && | |
1645 | cmd->transport_complete_callback) | |
1646 | cmd->transport_complete_callback(cmd); | |
c66ac9db | 1647 | |
de103c93 | 1648 | switch (sense_reason) { |
03e98c9e NB |
1649 | case TCM_NON_EXISTENT_LUN: |
1650 | case TCM_UNSUPPORTED_SCSI_OPCODE: | |
1651 | case TCM_INVALID_CDB_FIELD: | |
1652 | case TCM_INVALID_PARAMETER_LIST: | |
bb992e72 | 1653 | case TCM_PARAMETER_LIST_LENGTH_ERROR: |
03e98c9e NB |
1654 | case TCM_LOGICAL_UNIT_COMMUNICATION_FAILURE: |
1655 | case TCM_UNKNOWN_MODE_PAGE: | |
1656 | case TCM_WRITE_PROTECTED: | |
e2397c70 | 1657 | case TCM_ADDRESS_OUT_OF_RANGE: |
03e98c9e NB |
1658 | case TCM_CHECK_CONDITION_ABORT_CMD: |
1659 | case TCM_CHECK_CONDITION_UNIT_ATTENTION: | |
1660 | case TCM_CHECK_CONDITION_NOT_READY: | |
94387aa7 NB |
1661 | case TCM_LOGICAL_BLOCK_GUARD_CHECK_FAILED: |
1662 | case TCM_LOGICAL_BLOCK_APP_TAG_CHECK_FAILED: | |
1663 | case TCM_LOGICAL_BLOCK_REF_TAG_CHECK_FAILED: | |
c66ac9db | 1664 | break; |
de103c93 CH |
1665 | case TCM_OUT_OF_RESOURCES: |
1666 | sense_reason = TCM_LOGICAL_UNIT_COMMUNICATION_FAILURE; | |
1667 | break; | |
03e98c9e | 1668 | case TCM_RESERVATION_CONFLICT: |
c66ac9db NB |
1669 | /* |
1670 | * No SENSE Data payload for this case, set SCSI Status | |
1671 | * and queue the response to $FABRIC_MOD. | |
1672 | * | |
1673 | * Uses linux/include/scsi/scsi.h SAM status codes defs | |
1674 | */ | |
1675 | cmd->scsi_status = SAM_STAT_RESERVATION_CONFLICT; | |
1676 | /* | |
1677 | * For UA Interlock Code 11b, a RESERVATION CONFLICT will | |
1678 | * establish a UNIT ATTENTION with PREVIOUS RESERVATION | |
1679 | * CONFLICT STATUS. | |
1680 | * | |
1681 | * See spc4r17, section 7.4.6 Control Mode Page, Table 349 | |
1682 | */ | |
e3d6f909 | 1683 | if (cmd->se_sess && |
0fd97ccf | 1684 | cmd->se_dev->dev_attrib.emulate_ua_intlck_ctrl == 2) |
e3d6f909 | 1685 | core_scsi3_ua_allocate(cmd->se_sess->se_node_acl, |
c66ac9db NB |
1686 | cmd->orig_fe_lun, 0x2C, |
1687 | ASCQ_2CH_PREVIOUS_RESERVATION_CONFLICT_STATUS); | |
1688 | ||
e5c0d6ad RD |
1689 | trace_target_cmd_complete(cmd); |
1690 | ret = cmd->se_tfo-> queue_status(cmd); | |
f147abb4 | 1691 | if (ret == -EAGAIN || ret == -ENOMEM) |
07bde79a | 1692 | goto queue_full; |
c66ac9db | 1693 | goto check_stop; |
c66ac9db | 1694 | default: |
6708bb27 | 1695 | pr_err("Unknown transport error for CDB 0x%02x: %d\n", |
de103c93 CH |
1696 | cmd->t_task_cdb[0], sense_reason); |
1697 | sense_reason = TCM_UNSUPPORTED_SCSI_OPCODE; | |
c66ac9db NB |
1698 | break; |
1699 | } | |
f3146437 | 1700 | |
de103c93 | 1701 | ret = transport_send_check_condition_and_sense(cmd, sense_reason, 0); |
03e98c9e NB |
1702 | if (ret == -EAGAIN || ret == -ENOMEM) |
1703 | goto queue_full; | |
07bde79a | 1704 | |
c66ac9db NB |
1705 | check_stop: |
1706 | transport_lun_remove_cmd(cmd); | |
6708bb27 | 1707 | if (!transport_cmd_check_stop_to_fabric(cmd)) |
c66ac9db | 1708 | ; |
07bde79a NB |
1709 | return; |
1710 | ||
1711 | queue_full: | |
e057f533 CH |
1712 | cmd->t_state = TRANSPORT_COMPLETE_QF_OK; |
1713 | transport_handle_queue_full(cmd, cmd->se_dev); | |
c66ac9db | 1714 | } |
2fbff127 | 1715 | EXPORT_SYMBOL(transport_generic_request_failure); |
c66ac9db | 1716 | |
76dde50e | 1717 | void __target_execute_cmd(struct se_cmd *cmd) |
c66ac9db | 1718 | { |
de103c93 | 1719 | sense_reason_t ret; |
5f41a31d | 1720 | |
de103c93 CH |
1721 | if (cmd->execute_cmd) { |
1722 | ret = cmd->execute_cmd(cmd); | |
1723 | if (ret) { | |
1724 | spin_lock_irq(&cmd->t_state_lock); | |
1725 | cmd->transport_state &= ~(CMD_T_BUSY|CMD_T_SENT); | |
1726 | spin_unlock_irq(&cmd->t_state_lock); | |
5f41a31d | 1727 | |
de103c93 CH |
1728 | transport_generic_request_failure(cmd, ret); |
1729 | } | |
5f41a31d CH |
1730 | } |
1731 | } | |
1732 | ||
019c4ca6 | 1733 | static bool target_handle_task_attr(struct se_cmd *cmd) |
5f41a31d CH |
1734 | { |
1735 | struct se_device *dev = cmd->se_dev; | |
1736 | ||
019c4ca6 CH |
1737 | if (dev->transport->transport_type == TRANSPORT_PLUGIN_PHBA_PDEV) |
1738 | return false; | |
5f41a31d | 1739 | |
c66ac9db | 1740 | /* |
25985edc | 1741 | * Check for the existence of HEAD_OF_QUEUE, and if true return 1 |
c66ac9db NB |
1742 | * to allow the passed struct se_cmd list of tasks to the front of the list. |
1743 | */ | |
5f41a31d | 1744 | switch (cmd->sam_task_attr) { |
68d81f40 | 1745 | case TCM_HEAD_TAG: |
5f41a31d CH |
1746 | pr_debug("Added HEAD_OF_QUEUE for CDB: 0x%02x, " |
1747 | "se_ordered_id: %u\n", | |
1748 | cmd->t_task_cdb[0], cmd->se_ordered_id); | |
019c4ca6 | 1749 | return false; |
68d81f40 | 1750 | case TCM_ORDERED_TAG: |
33940d09 | 1751 | atomic_inc_mb(&dev->dev_ordered_sync); |
c66ac9db | 1752 | |
5f41a31d CH |
1753 | pr_debug("Added ORDERED for CDB: 0x%02x to ordered list, " |
1754 | " se_ordered_id: %u\n", | |
1755 | cmd->t_task_cdb[0], cmd->se_ordered_id); | |
1756 | ||
c66ac9db | 1757 | /* |
5f41a31d CH |
1758 | * Execute an ORDERED command if no other older commands |
1759 | * exist that need to be completed first. | |
c66ac9db | 1760 | */ |
5f41a31d | 1761 | if (!atomic_read(&dev->simple_cmds)) |
019c4ca6 | 1762 | return false; |
5f41a31d CH |
1763 | break; |
1764 | default: | |
c66ac9db NB |
1765 | /* |
1766 | * For SIMPLE and UNTAGGED Task Attribute commands | |
1767 | */ | |
33940d09 | 1768 | atomic_inc_mb(&dev->simple_cmds); |
5f41a31d | 1769 | break; |
c66ac9db | 1770 | } |
5f41a31d | 1771 | |
019c4ca6 CH |
1772 | if (atomic_read(&dev->dev_ordered_sync) == 0) |
1773 | return false; | |
c66ac9db | 1774 | |
019c4ca6 CH |
1775 | spin_lock(&dev->delayed_cmd_lock); |
1776 | list_add_tail(&cmd->se_delayed_node, &dev->delayed_cmd_list); | |
1777 | spin_unlock(&dev->delayed_cmd_lock); | |
1778 | ||
1779 | pr_debug("Added CDB: 0x%02x Task Attr: 0x%02x to" | |
1780 | " delayed CMD list, se_ordered_id: %u\n", | |
1781 | cmd->t_task_cdb[0], cmd->sam_task_attr, | |
1782 | cmd->se_ordered_id); | |
1783 | return true; | |
1784 | } | |
1785 | ||
1786 | void target_execute_cmd(struct se_cmd *cmd) | |
1787 | { | |
1788 | /* | |
1789 | * If the received CDB has aleady been aborted stop processing it here. | |
1790 | */ | |
4a9a6c8d | 1791 | if (transport_check_aborted_status(cmd, 1)) |
5f41a31d | 1792 | return; |
c66ac9db | 1793 | |
019c4ca6 CH |
1794 | /* |
1795 | * Determine if frontend context caller is requesting the stopping of | |
1796 | * this command for frontend exceptions. | |
1797 | */ | |
4a9a6c8d | 1798 | spin_lock_irq(&cmd->t_state_lock); |
019c4ca6 CH |
1799 | if (cmd->transport_state & CMD_T_STOP) { |
1800 | pr_debug("%s:%d CMD_T_STOP for ITT: 0x%08x\n", | |
1801 | __func__, __LINE__, | |
1802 | cmd->se_tfo->get_task_tag(cmd)); | |
1803 | ||
1804 | spin_unlock_irq(&cmd->t_state_lock); | |
a95d6511 | 1805 | complete_all(&cmd->t_transport_stop_comp); |
019c4ca6 CH |
1806 | return; |
1807 | } | |
1808 | ||
1809 | cmd->t_state = TRANSPORT_PROCESSING; | |
1a398b97 | 1810 | cmd->transport_state |= CMD_T_ACTIVE|CMD_T_BUSY|CMD_T_SENT; |
019c4ca6 | 1811 | spin_unlock_irq(&cmd->t_state_lock); |
a84bf9ee NB |
1812 | /* |
1813 | * Perform WRITE_INSERT of PI using software emulation when backend | |
1814 | * device has PI enabled, if the transport has not already generated | |
1815 | * PI using hardware WRITE_INSERT offload. | |
1816 | */ | |
1817 | if (cmd->prot_op == TARGET_PROT_DOUT_INSERT) { | |
1818 | if (!(cmd->se_sess->sup_prot_ops & TARGET_PROT_DOUT_INSERT)) | |
1819 | sbc_dif_generate(cmd); | |
1820 | } | |
019c4ca6 | 1821 | |
1a398b97 NB |
1822 | if (target_handle_task_attr(cmd)) { |
1823 | spin_lock_irq(&cmd->t_state_lock); | |
1824 | cmd->transport_state &= ~CMD_T_BUSY|CMD_T_SENT; | |
1825 | spin_unlock_irq(&cmd->t_state_lock); | |
1826 | return; | |
1827 | } | |
1828 | ||
1829 | __target_execute_cmd(cmd); | |
c66ac9db | 1830 | } |
70baf0ab | 1831 | EXPORT_SYMBOL(target_execute_cmd); |
c66ac9db | 1832 | |
5f41a31d CH |
1833 | /* |
1834 | * Process all commands up to the last received ORDERED task attribute which | |
1835 | * requires another blocking boundary | |
1836 | */ | |
1837 | static void target_restart_delayed_cmds(struct se_device *dev) | |
1838 | { | |
1839 | for (;;) { | |
1840 | struct se_cmd *cmd; | |
1841 | ||
1842 | spin_lock(&dev->delayed_cmd_lock); | |
1843 | if (list_empty(&dev->delayed_cmd_list)) { | |
1844 | spin_unlock(&dev->delayed_cmd_lock); | |
1845 | break; | |
1846 | } | |
1847 | ||
1848 | cmd = list_entry(dev->delayed_cmd_list.next, | |
1849 | struct se_cmd, se_delayed_node); | |
1850 | list_del(&cmd->se_delayed_node); | |
1851 | spin_unlock(&dev->delayed_cmd_lock); | |
1852 | ||
1853 | __target_execute_cmd(cmd); | |
1854 | ||
68d81f40 | 1855 | if (cmd->sam_task_attr == TCM_ORDERED_TAG) |
5f41a31d CH |
1856 | break; |
1857 | } | |
1858 | } | |
1859 | ||
c66ac9db | 1860 | /* |
35e0e757 | 1861 | * Called from I/O completion to determine which dormant/delayed |
c66ac9db NB |
1862 | * and ordered cmds need to have their tasks added to the execution queue. |
1863 | */ | |
1864 | static void transport_complete_task_attr(struct se_cmd *cmd) | |
1865 | { | |
5951146d | 1866 | struct se_device *dev = cmd->se_dev; |
c66ac9db | 1867 | |
019c4ca6 CH |
1868 | if (dev->transport->transport_type == TRANSPORT_PLUGIN_PHBA_PDEV) |
1869 | return; | |
1870 | ||
68d81f40 | 1871 | if (cmd->sam_task_attr == TCM_SIMPLE_TAG) { |
33940d09 | 1872 | atomic_dec_mb(&dev->simple_cmds); |
c66ac9db | 1873 | dev->dev_cur_ordered_id++; |
6708bb27 | 1874 | pr_debug("Incremented dev->dev_cur_ordered_id: %u for" |
c66ac9db NB |
1875 | " SIMPLE: %u\n", dev->dev_cur_ordered_id, |
1876 | cmd->se_ordered_id); | |
68d81f40 | 1877 | } else if (cmd->sam_task_attr == TCM_HEAD_TAG) { |
c66ac9db | 1878 | dev->dev_cur_ordered_id++; |
6708bb27 | 1879 | pr_debug("Incremented dev_cur_ordered_id: %u for" |
c66ac9db NB |
1880 | " HEAD_OF_QUEUE: %u\n", dev->dev_cur_ordered_id, |
1881 | cmd->se_ordered_id); | |
68d81f40 | 1882 | } else if (cmd->sam_task_attr == TCM_ORDERED_TAG) { |
33940d09 | 1883 | atomic_dec_mb(&dev->dev_ordered_sync); |
c66ac9db NB |
1884 | |
1885 | dev->dev_cur_ordered_id++; | |
6708bb27 | 1886 | pr_debug("Incremented dev_cur_ordered_id: %u for ORDERED:" |
c66ac9db NB |
1887 | " %u\n", dev->dev_cur_ordered_id, cmd->se_ordered_id); |
1888 | } | |
c66ac9db | 1889 | |
5f41a31d | 1890 | target_restart_delayed_cmds(dev); |
c66ac9db NB |
1891 | } |
1892 | ||
e057f533 | 1893 | static void transport_complete_qf(struct se_cmd *cmd) |
07bde79a NB |
1894 | { |
1895 | int ret = 0; | |
1896 | ||
019c4ca6 | 1897 | transport_complete_task_attr(cmd); |
e057f533 CH |
1898 | |
1899 | if (cmd->se_cmd_flags & SCF_TRANSPORT_TASK_SENSE) { | |
e5c0d6ad | 1900 | trace_target_cmd_complete(cmd); |
e057f533 | 1901 | ret = cmd->se_tfo->queue_status(cmd); |
082f58ac | 1902 | goto out; |
e057f533 | 1903 | } |
07bde79a NB |
1904 | |
1905 | switch (cmd->data_direction) { | |
1906 | case DMA_FROM_DEVICE: | |
e5c0d6ad | 1907 | trace_target_cmd_complete(cmd); |
07bde79a NB |
1908 | ret = cmd->se_tfo->queue_data_in(cmd); |
1909 | break; | |
1910 | case DMA_TO_DEVICE: | |
64577407 | 1911 | if (cmd->se_cmd_flags & SCF_BIDI) { |
07bde79a NB |
1912 | ret = cmd->se_tfo->queue_data_in(cmd); |
1913 | if (ret < 0) | |
e057f533 | 1914 | break; |
07bde79a NB |
1915 | } |
1916 | /* Fall through for DMA_TO_DEVICE */ | |
1917 | case DMA_NONE: | |
e5c0d6ad | 1918 | trace_target_cmd_complete(cmd); |
07bde79a NB |
1919 | ret = cmd->se_tfo->queue_status(cmd); |
1920 | break; | |
1921 | default: | |
1922 | break; | |
1923 | } | |
1924 | ||
e057f533 CH |
1925 | out: |
1926 | if (ret < 0) { | |
1927 | transport_handle_queue_full(cmd, cmd->se_dev); | |
1928 | return; | |
1929 | } | |
1930 | transport_lun_remove_cmd(cmd); | |
1931 | transport_cmd_check_stop_to_fabric(cmd); | |
07bde79a NB |
1932 | } |
1933 | ||
1934 | static void transport_handle_queue_full( | |
1935 | struct se_cmd *cmd, | |
e057f533 | 1936 | struct se_device *dev) |
07bde79a NB |
1937 | { |
1938 | spin_lock_irq(&dev->qf_cmd_lock); | |
07bde79a | 1939 | list_add_tail(&cmd->se_qf_node, &cmd->se_dev->qf_cmd_list); |
33940d09 | 1940 | atomic_inc_mb(&dev->dev_qf_count); |
07bde79a NB |
1941 | spin_unlock_irq(&cmd->se_dev->qf_cmd_lock); |
1942 | ||
1943 | schedule_work(&cmd->se_dev->qf_work_queue); | |
1944 | } | |
1945 | ||
bc005869 NB |
1946 | static bool target_check_read_strip(struct se_cmd *cmd) |
1947 | { | |
1948 | sense_reason_t rc; | |
1949 | ||
1950 | if (!(cmd->se_sess->sup_prot_ops & TARGET_PROT_DIN_STRIP)) { | |
1951 | rc = sbc_dif_read_strip(cmd); | |
1952 | if (rc) { | |
1953 | cmd->pi_err = rc; | |
1954 | return true; | |
1955 | } | |
1956 | } | |
1957 | ||
1958 | return false; | |
1959 | } | |
1960 | ||
35e0e757 | 1961 | static void target_complete_ok_work(struct work_struct *work) |
c66ac9db | 1962 | { |
35e0e757 | 1963 | struct se_cmd *cmd = container_of(work, struct se_cmd, work); |
27a27099 | 1964 | int ret; |
35e0e757 | 1965 | |
c66ac9db NB |
1966 | /* |
1967 | * Check if we need to move delayed/dormant tasks from cmds on the | |
1968 | * delayed execution list after a HEAD_OF_QUEUE or ORDERED Task | |
1969 | * Attribute. | |
1970 | */ | |
019c4ca6 CH |
1971 | transport_complete_task_attr(cmd); |
1972 | ||
07bde79a NB |
1973 | /* |
1974 | * Check to schedule QUEUE_FULL work, or execute an existing | |
1975 | * cmd->transport_qf_callback() | |
1976 | */ | |
1977 | if (atomic_read(&cmd->se_dev->dev_qf_count) != 0) | |
1978 | schedule_work(&cmd->se_dev->qf_work_queue); | |
1979 | ||
c66ac9db | 1980 | /* |
d5829eac | 1981 | * Check if we need to send a sense buffer from |
c66ac9db NB |
1982 | * the struct se_cmd in question. |
1983 | */ | |
1984 | if (cmd->se_cmd_flags & SCF_TRANSPORT_TASK_SENSE) { | |
27a27099 | 1985 | WARN_ON(!cmd->scsi_status); |
27a27099 PB |
1986 | ret = transport_send_check_condition_and_sense( |
1987 | cmd, 0, 1); | |
1988 | if (ret == -EAGAIN || ret == -ENOMEM) | |
1989 | goto queue_full; | |
1990 | ||
1991 | transport_lun_remove_cmd(cmd); | |
1992 | transport_cmd_check_stop_to_fabric(cmd); | |
1993 | return; | |
c66ac9db NB |
1994 | } |
1995 | /* | |
25985edc | 1996 | * Check for a callback, used by amongst other things |
a6b0133c | 1997 | * XDWRITE_READ_10 and COMPARE_AND_WRITE emulation. |
c66ac9db | 1998 | */ |
a6b0133c NB |
1999 | if (cmd->transport_complete_callback) { |
2000 | sense_reason_t rc; | |
2001 | ||
2002 | rc = cmd->transport_complete_callback(cmd); | |
a2890087 | 2003 | if (!rc && !(cmd->se_cmd_flags & SCF_COMPARE_AND_WRITE_POST)) { |
a6b0133c | 2004 | return; |
a2890087 NB |
2005 | } else if (rc) { |
2006 | ret = transport_send_check_condition_and_sense(cmd, | |
2007 | rc, 0); | |
2008 | if (ret == -EAGAIN || ret == -ENOMEM) | |
2009 | goto queue_full; | |
a6b0133c | 2010 | |
a2890087 NB |
2011 | transport_lun_remove_cmd(cmd); |
2012 | transport_cmd_check_stop_to_fabric(cmd); | |
2013 | return; | |
2014 | } | |
a6b0133c | 2015 | } |
c66ac9db NB |
2016 | |
2017 | switch (cmd->data_direction) { | |
2018 | case DMA_FROM_DEVICE: | |
2019 | spin_lock(&cmd->se_lun->lun_sep_lock); | |
e3d6f909 AG |
2020 | if (cmd->se_lun->lun_sep) { |
2021 | cmd->se_lun->lun_sep->sep_stats.tx_data_octets += | |
c66ac9db NB |
2022 | cmd->data_length; |
2023 | } | |
2024 | spin_unlock(&cmd->se_lun->lun_sep_lock); | |
bc005869 NB |
2025 | /* |
2026 | * Perform READ_STRIP of PI using software emulation when | |
2027 | * backend had PI enabled, if the transport will not be | |
2028 | * performing hardware READ_STRIP offload. | |
2029 | */ | |
2030 | if (cmd->prot_op == TARGET_PROT_DIN_STRIP && | |
2031 | target_check_read_strip(cmd)) { | |
2032 | ret = transport_send_check_condition_and_sense(cmd, | |
2033 | cmd->pi_err, 0); | |
2034 | if (ret == -EAGAIN || ret == -ENOMEM) | |
2035 | goto queue_full; | |
2036 | ||
2037 | transport_lun_remove_cmd(cmd); | |
2038 | transport_cmd_check_stop_to_fabric(cmd); | |
2039 | return; | |
2040 | } | |
c66ac9db | 2041 | |
e5c0d6ad | 2042 | trace_target_cmd_complete(cmd); |
07bde79a | 2043 | ret = cmd->se_tfo->queue_data_in(cmd); |
f147abb4 | 2044 | if (ret == -EAGAIN || ret == -ENOMEM) |
07bde79a | 2045 | goto queue_full; |
c66ac9db NB |
2046 | break; |
2047 | case DMA_TO_DEVICE: | |
2048 | spin_lock(&cmd->se_lun->lun_sep_lock); | |
e3d6f909 AG |
2049 | if (cmd->se_lun->lun_sep) { |
2050 | cmd->se_lun->lun_sep->sep_stats.rx_data_octets += | |
c66ac9db NB |
2051 | cmd->data_length; |
2052 | } | |
2053 | spin_unlock(&cmd->se_lun->lun_sep_lock); | |
2054 | /* | |
2055 | * Check if we need to send READ payload for BIDI-COMMAND | |
2056 | */ | |
64577407 | 2057 | if (cmd->se_cmd_flags & SCF_BIDI) { |
c66ac9db | 2058 | spin_lock(&cmd->se_lun->lun_sep_lock); |
e3d6f909 AG |
2059 | if (cmd->se_lun->lun_sep) { |
2060 | cmd->se_lun->lun_sep->sep_stats.tx_data_octets += | |
c66ac9db NB |
2061 | cmd->data_length; |
2062 | } | |
2063 | spin_unlock(&cmd->se_lun->lun_sep_lock); | |
07bde79a | 2064 | ret = cmd->se_tfo->queue_data_in(cmd); |
f147abb4 | 2065 | if (ret == -EAGAIN || ret == -ENOMEM) |
07bde79a | 2066 | goto queue_full; |
c66ac9db NB |
2067 | break; |
2068 | } | |
2069 | /* Fall through for DMA_TO_DEVICE */ | |
2070 | case DMA_NONE: | |
e5c0d6ad | 2071 | trace_target_cmd_complete(cmd); |
07bde79a | 2072 | ret = cmd->se_tfo->queue_status(cmd); |
f147abb4 | 2073 | if (ret == -EAGAIN || ret == -ENOMEM) |
07bde79a | 2074 | goto queue_full; |
c66ac9db NB |
2075 | break; |
2076 | default: | |
2077 | break; | |
2078 | } | |
2079 | ||
2080 | transport_lun_remove_cmd(cmd); | |
2081 | transport_cmd_check_stop_to_fabric(cmd); | |
07bde79a NB |
2082 | return; |
2083 | ||
2084 | queue_full: | |
6708bb27 | 2085 | pr_debug("Handling complete_ok QUEUE_FULL: se_cmd: %p," |
07bde79a | 2086 | " data_direction: %d\n", cmd, cmd->data_direction); |
e057f533 CH |
2087 | cmd->t_state = TRANSPORT_COMPLETE_QF_OK; |
2088 | transport_handle_queue_full(cmd, cmd->se_dev); | |
c66ac9db NB |
2089 | } |
2090 | ||
6708bb27 | 2091 | static inline void transport_free_sgl(struct scatterlist *sgl, int nents) |
c66ac9db | 2092 | { |
ec98f782 | 2093 | struct scatterlist *sg; |
ec98f782 | 2094 | int count; |
c66ac9db | 2095 | |
6708bb27 AG |
2096 | for_each_sg(sgl, sg, nents, count) |
2097 | __free_page(sg_page(sg)); | |
c66ac9db | 2098 | |
6708bb27 AG |
2099 | kfree(sgl); |
2100 | } | |
c66ac9db | 2101 | |
47e459e6 NB |
2102 | static inline void transport_reset_sgl_orig(struct se_cmd *cmd) |
2103 | { | |
2104 | /* | |
2105 | * Check for saved t_data_sg that may be used for COMPARE_AND_WRITE | |
2106 | * emulation, and free + reset pointers if necessary.. | |
2107 | */ | |
2108 | if (!cmd->t_data_sg_orig) | |
2109 | return; | |
2110 | ||
2111 | kfree(cmd->t_data_sg); | |
2112 | cmd->t_data_sg = cmd->t_data_sg_orig; | |
2113 | cmd->t_data_sg_orig = NULL; | |
2114 | cmd->t_data_nents = cmd->t_data_nents_orig; | |
2115 | cmd->t_data_nents_orig = 0; | |
2116 | } | |
2117 | ||
6708bb27 AG |
2118 | static inline void transport_free_pages(struct se_cmd *cmd) |
2119 | { | |
47e459e6 NB |
2120 | if (cmd->se_cmd_flags & SCF_PASSTHROUGH_SG_TO_MEM_NOALLOC) { |
2121 | transport_reset_sgl_orig(cmd); | |
6708bb27 | 2122 | return; |
47e459e6 NB |
2123 | } |
2124 | transport_reset_sgl_orig(cmd); | |
6708bb27 AG |
2125 | |
2126 | transport_free_sgl(cmd->t_data_sg, cmd->t_data_nents); | |
ec98f782 AG |
2127 | cmd->t_data_sg = NULL; |
2128 | cmd->t_data_nents = 0; | |
c66ac9db | 2129 | |
6708bb27 | 2130 | transport_free_sgl(cmd->t_bidi_data_sg, cmd->t_bidi_data_nents); |
ec98f782 AG |
2131 | cmd->t_bidi_data_sg = NULL; |
2132 | cmd->t_bidi_data_nents = 0; | |
acb2bde3 SG |
2133 | |
2134 | transport_free_sgl(cmd->t_prot_sg, cmd->t_prot_nents); | |
2135 | cmd->t_prot_sg = NULL; | |
2136 | cmd->t_prot_nents = 0; | |
c66ac9db NB |
2137 | } |
2138 | ||
e26d99ae CH |
2139 | /** |
2140 | * transport_release_cmd - free a command | |
2141 | * @cmd: command to free | |
2142 | * | |
2143 | * This routine unconditionally frees a command, and reference counting | |
2144 | * or list removal must be done in the caller. | |
2145 | */ | |
d5ddad41 | 2146 | static int transport_release_cmd(struct se_cmd *cmd) |
e26d99ae CH |
2147 | { |
2148 | BUG_ON(!cmd->se_tfo); | |
2149 | ||
c8e31f26 | 2150 | if (cmd->se_cmd_flags & SCF_SCSI_TMR_CDB) |
e26d99ae CH |
2151 | core_tmr_release_req(cmd->se_tmr_req); |
2152 | if (cmd->t_task_cdb != cmd->__t_task_cdb) | |
2153 | kfree(cmd->t_task_cdb); | |
2154 | /* | |
7481deb4 NB |
2155 | * If this cmd has been setup with target_get_sess_cmd(), drop |
2156 | * the kref and call ->release_cmd() in kref callback. | |
e26d99ae | 2157 | */ |
ca24976a | 2158 | return target_put_sess_cmd(cmd->se_sess, cmd); |
e26d99ae CH |
2159 | } |
2160 | ||
d3df7825 CH |
2161 | /** |
2162 | * transport_put_cmd - release a reference to a command | |
2163 | * @cmd: command to release | |
2164 | * | |
2165 | * This routine releases our reference to the command and frees it if possible. | |
2166 | */ | |
d5ddad41 | 2167 | static int transport_put_cmd(struct se_cmd *cmd) |
c66ac9db | 2168 | { |
c66ac9db | 2169 | transport_free_pages(cmd); |
d5ddad41 | 2170 | return transport_release_cmd(cmd); |
c66ac9db | 2171 | } |
c66ac9db | 2172 | |
4949314c | 2173 | void *transport_kmap_data_sg(struct se_cmd *cmd) |
05d1c7c0 | 2174 | { |
ec98f782 | 2175 | struct scatterlist *sg = cmd->t_data_sg; |
4949314c AG |
2176 | struct page **pages; |
2177 | int i; | |
05d1c7c0 AG |
2178 | |
2179 | /* | |
ec98f782 AG |
2180 | * We need to take into account a possible offset here for fabrics like |
2181 | * tcm_loop who may be using a contig buffer from the SCSI midlayer for | |
2182 | * control CDBs passed as SGLs via transport_generic_map_mem_to_cmd() | |
05d1c7c0 | 2183 | */ |
4949314c AG |
2184 | if (!cmd->t_data_nents) |
2185 | return NULL; | |
3717ef0c PB |
2186 | |
2187 | BUG_ON(!sg); | |
2188 | if (cmd->t_data_nents == 1) | |
4949314c AG |
2189 | return kmap(sg_page(sg)) + sg->offset; |
2190 | ||
2191 | /* >1 page. use vmap */ | |
2192 | pages = kmalloc(sizeof(*pages) * cmd->t_data_nents, GFP_KERNEL); | |
de103c93 | 2193 | if (!pages) |
4949314c AG |
2194 | return NULL; |
2195 | ||
2196 | /* convert sg[] to pages[] */ | |
2197 | for_each_sg(cmd->t_data_sg, sg, cmd->t_data_nents, i) { | |
2198 | pages[i] = sg_page(sg); | |
2199 | } | |
2200 | ||
2201 | cmd->t_data_vmap = vmap(pages, cmd->t_data_nents, VM_MAP, PAGE_KERNEL); | |
2202 | kfree(pages); | |
de103c93 | 2203 | if (!cmd->t_data_vmap) |
4949314c AG |
2204 | return NULL; |
2205 | ||
2206 | return cmd->t_data_vmap + cmd->t_data_sg[0].offset; | |
05d1c7c0 | 2207 | } |
4949314c | 2208 | EXPORT_SYMBOL(transport_kmap_data_sg); |
05d1c7c0 | 2209 | |
4949314c | 2210 | void transport_kunmap_data_sg(struct se_cmd *cmd) |
05d1c7c0 | 2211 | { |
a1edf9cf | 2212 | if (!cmd->t_data_nents) { |
4949314c | 2213 | return; |
a1edf9cf | 2214 | } else if (cmd->t_data_nents == 1) { |
4949314c | 2215 | kunmap(sg_page(cmd->t_data_sg)); |
a1edf9cf AG |
2216 | return; |
2217 | } | |
4949314c AG |
2218 | |
2219 | vunmap(cmd->t_data_vmap); | |
2220 | cmd->t_data_vmap = NULL; | |
05d1c7c0 | 2221 | } |
4949314c | 2222 | EXPORT_SYMBOL(transport_kunmap_data_sg); |
05d1c7c0 | 2223 | |
c5ff8d6b | 2224 | int |
20093994 NB |
2225 | target_alloc_sgl(struct scatterlist **sgl, unsigned int *nents, u32 length, |
2226 | bool zero_page) | |
c66ac9db | 2227 | { |
20093994 | 2228 | struct scatterlist *sg; |
ec98f782 | 2229 | struct page *page; |
20093994 NB |
2230 | gfp_t zero_flag = (zero_page) ? __GFP_ZERO : 0; |
2231 | unsigned int nent; | |
ec98f782 | 2232 | int i = 0; |
c66ac9db | 2233 | |
20093994 NB |
2234 | nent = DIV_ROUND_UP(length, PAGE_SIZE); |
2235 | sg = kmalloc(sizeof(struct scatterlist) * nent, GFP_KERNEL); | |
2236 | if (!sg) | |
ec98f782 | 2237 | return -ENOMEM; |
c66ac9db | 2238 | |
20093994 | 2239 | sg_init_table(sg, nent); |
9db9da33 | 2240 | |
ec98f782 AG |
2241 | while (length) { |
2242 | u32 page_len = min_t(u32, length, PAGE_SIZE); | |
9db9da33 | 2243 | page = alloc_page(GFP_KERNEL | zero_flag); |
ec98f782 AG |
2244 | if (!page) |
2245 | goto out; | |
c66ac9db | 2246 | |
20093994 | 2247 | sg_set_page(&sg[i], page, page_len, 0); |
ec98f782 AG |
2248 | length -= page_len; |
2249 | i++; | |
c66ac9db | 2250 | } |
20093994 NB |
2251 | *sgl = sg; |
2252 | *nents = nent; | |
c66ac9db | 2253 | return 0; |
c66ac9db | 2254 | |
ec98f782 | 2255 | out: |
d0e27c88 | 2256 | while (i > 0) { |
ec98f782 | 2257 | i--; |
20093994 | 2258 | __free_page(sg_page(&sg[i])); |
c66ac9db | 2259 | } |
20093994 | 2260 | kfree(sg); |
ec98f782 | 2261 | return -ENOMEM; |
c66ac9db NB |
2262 | } |
2263 | ||
da0f7619 | 2264 | /* |
b16a35b0 AG |
2265 | * Allocate any required resources to execute the command. For writes we |
2266 | * might not have the payload yet, so notify the fabric via a call to | |
2267 | * ->write_pending instead. Otherwise place it on the execution queue. | |
c66ac9db | 2268 | */ |
de103c93 CH |
2269 | sense_reason_t |
2270 | transport_generic_new_cmd(struct se_cmd *cmd) | |
c66ac9db | 2271 | { |
c66ac9db NB |
2272 | int ret = 0; |
2273 | ||
2274 | /* | |
2275 | * Determine is the TCM fabric module has already allocated physical | |
2276 | * memory, and is directly calling transport_generic_map_mem_to_cmd() | |
ec98f782 | 2277 | * beforehand. |
c66ac9db | 2278 | */ |
ec98f782 AG |
2279 | if (!(cmd->se_cmd_flags & SCF_PASSTHROUGH_SG_TO_MEM_NOALLOC) && |
2280 | cmd->data_length) { | |
20093994 NB |
2281 | bool zero_flag = !(cmd->se_cmd_flags & SCF_SCSI_DATA_CDB); |
2282 | ||
8cefe07b NB |
2283 | if ((cmd->se_cmd_flags & SCF_BIDI) || |
2284 | (cmd->se_cmd_flags & SCF_COMPARE_AND_WRITE)) { | |
2285 | u32 bidi_length; | |
2286 | ||
2287 | if (cmd->se_cmd_flags & SCF_COMPARE_AND_WRITE) | |
2288 | bidi_length = cmd->t_task_nolb * | |
2289 | cmd->se_dev->dev_attrib.block_size; | |
2290 | else | |
2291 | bidi_length = cmd->data_length; | |
2292 | ||
2293 | ret = target_alloc_sgl(&cmd->t_bidi_data_sg, | |
2294 | &cmd->t_bidi_data_nents, | |
2295 | bidi_length, zero_flag); | |
2296 | if (ret < 0) | |
2297 | return TCM_LOGICAL_UNIT_COMMUNICATION_FAILURE; | |
2298 | } | |
2299 | ||
19f9361a | 2300 | if (cmd->prot_op != TARGET_PROT_NORMAL) { |
acb2bde3 SG |
2301 | ret = target_alloc_sgl(&cmd->t_prot_sg, |
2302 | &cmd->t_prot_nents, | |
2303 | cmd->prot_length, true); | |
2304 | if (ret < 0) | |
2305 | return TCM_LOGICAL_UNIT_COMMUNICATION_FAILURE; | |
2306 | } | |
2307 | ||
20093994 NB |
2308 | ret = target_alloc_sgl(&cmd->t_data_sg, &cmd->t_data_nents, |
2309 | cmd->data_length, zero_flag); | |
c66ac9db | 2310 | if (ret < 0) |
de103c93 | 2311 | return TCM_LOGICAL_UNIT_COMMUNICATION_FAILURE; |
c66ac9db | 2312 | } |
c66ac9db | 2313 | /* |
c3196f0c CH |
2314 | * If this command is not a write we can execute it right here, |
2315 | * for write buffers we need to notify the fabric driver first | |
2316 | * and let it call back once the write buffers are ready. | |
c66ac9db | 2317 | */ |
5f41a31d | 2318 | target_add_to_state_list(cmd); |
885e7b0e | 2319 | if (cmd->data_direction != DMA_TO_DEVICE || cmd->data_length == 0) { |
c3196f0c CH |
2320 | target_execute_cmd(cmd); |
2321 | return 0; | |
2322 | } | |
862e6389 | 2323 | transport_cmd_check_stop(cmd, false, true); |
c3196f0c CH |
2324 | |
2325 | ret = cmd->se_tfo->write_pending(cmd); | |
2326 | if (ret == -EAGAIN || ret == -ENOMEM) | |
2327 | goto queue_full; | |
2328 | ||
de103c93 CH |
2329 | /* fabric drivers should only return -EAGAIN or -ENOMEM as error */ |
2330 | WARN_ON(ret); | |
2331 | ||
b69c1fcf | 2332 | return (!ret) ? 0 : TCM_LOGICAL_UNIT_COMMUNICATION_FAILURE; |
da0f7619 | 2333 | |
c3196f0c CH |
2334 | queue_full: |
2335 | pr_debug("Handling write_pending QUEUE__FULL: se_cmd: %p\n", cmd); | |
2336 | cmd->t_state = TRANSPORT_COMPLETE_QF_WP; | |
2337 | transport_handle_queue_full(cmd, cmd->se_dev); | |
2338 | return 0; | |
c66ac9db | 2339 | } |
a1d8b49a | 2340 | EXPORT_SYMBOL(transport_generic_new_cmd); |
c66ac9db | 2341 | |
e057f533 | 2342 | static void transport_write_pending_qf(struct se_cmd *cmd) |
07bde79a | 2343 | { |
f147abb4 NB |
2344 | int ret; |
2345 | ||
2346 | ret = cmd->se_tfo->write_pending(cmd); | |
2347 | if (ret == -EAGAIN || ret == -ENOMEM) { | |
e057f533 CH |
2348 | pr_debug("Handling write_pending QUEUE__FULL: se_cmd: %p\n", |
2349 | cmd); | |
2350 | transport_handle_queue_full(cmd, cmd->se_dev); | |
2351 | } | |
07bde79a NB |
2352 | } |
2353 | ||
d5ddad41 | 2354 | int transport_generic_free_cmd(struct se_cmd *cmd, int wait_for_tasks) |
c66ac9db | 2355 | { |
c130480b | 2356 | unsigned long flags; |
d5ddad41 NB |
2357 | int ret = 0; |
2358 | ||
d14921d6 | 2359 | if (!(cmd->se_cmd_flags & SCF_SE_LUN_CMD)) { |
c8e31f26 | 2360 | if (wait_for_tasks && (cmd->se_cmd_flags & SCF_SCSI_TMR_CDB)) |
d14921d6 NB |
2361 | transport_wait_for_tasks(cmd); |
2362 | ||
d5ddad41 | 2363 | ret = transport_release_cmd(cmd); |
d14921d6 NB |
2364 | } else { |
2365 | if (wait_for_tasks) | |
2366 | transport_wait_for_tasks(cmd); | |
c130480b NB |
2367 | /* |
2368 | * Handle WRITE failure case where transport_generic_new_cmd() | |
2369 | * has already added se_cmd to state_list, but fabric has | |
2370 | * failed command before I/O submission. | |
2371 | */ | |
2372 | if (cmd->state_active) { | |
2373 | spin_lock_irqsave(&cmd->t_state_lock, flags); | |
2374 | target_remove_from_state_list(cmd); | |
2375 | spin_unlock_irqrestore(&cmd->t_state_lock, flags); | |
2376 | } | |
d14921d6 | 2377 | |
82f1c8a4 | 2378 | if (cmd->se_lun) |
c66ac9db | 2379 | transport_lun_remove_cmd(cmd); |
c66ac9db | 2380 | |
d5ddad41 | 2381 | ret = transport_put_cmd(cmd); |
c66ac9db | 2382 | } |
d5ddad41 | 2383 | return ret; |
c66ac9db NB |
2384 | } |
2385 | EXPORT_SYMBOL(transport_generic_free_cmd); | |
2386 | ||
a17f091d NB |
2387 | /* target_get_sess_cmd - Add command to active ->sess_cmd_list |
2388 | * @se_sess: session to reference | |
2389 | * @se_cmd: command descriptor to add | |
a6360785 | 2390 | * @ack_kref: Signal that fabric will perform an ack target_put_sess_cmd() |
a17f091d | 2391 | */ |
20361e69 | 2392 | int target_get_sess_cmd(struct se_session *se_sess, struct se_cmd *se_cmd, |
bc187ea6 | 2393 | bool ack_kref) |
a17f091d NB |
2394 | { |
2395 | unsigned long flags; | |
bc187ea6 | 2396 | int ret = 0; |
a17f091d | 2397 | |
a6360785 NB |
2398 | /* |
2399 | * Add a second kref if the fabric caller is expecting to handle | |
2400 | * fabric acknowledgement that requires two target_put_sess_cmd() | |
2401 | * invocations before se_cmd descriptor release. | |
2402 | */ | |
0bcc297e | 2403 | if (ack_kref) { |
a6360785 | 2404 | kref_get(&se_cmd->cmd_kref); |
86715569 NB |
2405 | se_cmd->se_cmd_flags |= SCF_ACK_KREF; |
2406 | } | |
7481deb4 | 2407 | |
a17f091d | 2408 | spin_lock_irqsave(&se_sess->sess_cmd_lock, flags); |
bc187ea6 RD |
2409 | if (se_sess->sess_tearing_down) { |
2410 | ret = -ESHUTDOWN; | |
2411 | goto out; | |
2412 | } | |
a17f091d | 2413 | list_add_tail(&se_cmd->se_cmd_list, &se_sess->sess_cmd_list); |
bc187ea6 | 2414 | out: |
a17f091d | 2415 | spin_unlock_irqrestore(&se_sess->sess_cmd_lock, flags); |
bc187ea6 | 2416 | return ret; |
a17f091d | 2417 | } |
20361e69 | 2418 | EXPORT_SYMBOL(target_get_sess_cmd); |
a17f091d | 2419 | |
7481deb4 | 2420 | static void target_release_cmd_kref(struct kref *kref) |
a17f091d | 2421 | { |
7481deb4 NB |
2422 | struct se_cmd *se_cmd = container_of(kref, struct se_cmd, cmd_kref); |
2423 | struct se_session *se_sess = se_cmd->se_sess; | |
a17f091d | 2424 | |
a17f091d | 2425 | if (list_empty(&se_cmd->se_cmd_list)) { |
ccf5ae83 | 2426 | spin_unlock(&se_sess->sess_cmd_lock); |
ffc32d52 | 2427 | se_cmd->se_tfo->release_cmd(se_cmd); |
7481deb4 | 2428 | return; |
a17f091d | 2429 | } |
a17f091d | 2430 | if (se_sess->sess_tearing_down && se_cmd->cmd_wait_set) { |
ccf5ae83 | 2431 | spin_unlock(&se_sess->sess_cmd_lock); |
a17f091d | 2432 | complete(&se_cmd->cmd_wait_comp); |
7481deb4 | 2433 | return; |
a17f091d NB |
2434 | } |
2435 | list_del(&se_cmd->se_cmd_list); | |
ccf5ae83 | 2436 | spin_unlock(&se_sess->sess_cmd_lock); |
a17f091d | 2437 | |
7481deb4 NB |
2438 | se_cmd->se_tfo->release_cmd(se_cmd); |
2439 | } | |
2440 | ||
2441 | /* target_put_sess_cmd - Check for active I/O shutdown via kref_put | |
2442 | * @se_sess: session to reference | |
2443 | * @se_cmd: command descriptor to drop | |
2444 | */ | |
2445 | int target_put_sess_cmd(struct se_session *se_sess, struct se_cmd *se_cmd) | |
2446 | { | |
0ed6e189 NB |
2447 | if (!se_sess) { |
2448 | se_cmd->se_tfo->release_cmd(se_cmd); | |
2449 | return 1; | |
2450 | } | |
ccf5ae83 JE |
2451 | return kref_put_spinlock_irqsave(&se_cmd->cmd_kref, target_release_cmd_kref, |
2452 | &se_sess->sess_cmd_lock); | |
a17f091d NB |
2453 | } |
2454 | EXPORT_SYMBOL(target_put_sess_cmd); | |
2455 | ||
1c7b13fe RD |
2456 | /* target_sess_cmd_list_set_waiting - Flag all commands in |
2457 | * sess_cmd_list to complete cmd_wait_comp. Set | |
2458 | * sess_tearing_down so no more commands are queued. | |
2459 | * @se_sess: session to flag | |
a17f091d | 2460 | */ |
1c7b13fe | 2461 | void target_sess_cmd_list_set_waiting(struct se_session *se_sess) |
a17f091d NB |
2462 | { |
2463 | struct se_cmd *se_cmd; | |
2464 | unsigned long flags; | |
2465 | ||
a17f091d | 2466 | spin_lock_irqsave(&se_sess->sess_cmd_lock, flags); |
9b31a328 NB |
2467 | if (se_sess->sess_tearing_down) { |
2468 | spin_unlock_irqrestore(&se_sess->sess_cmd_lock, flags); | |
2469 | return; | |
2470 | } | |
1c7b13fe | 2471 | se_sess->sess_tearing_down = 1; |
9b31a328 | 2472 | list_splice_init(&se_sess->sess_cmd_list, &se_sess->sess_wait_list); |
a17f091d | 2473 | |
9b31a328 | 2474 | list_for_each_entry(se_cmd, &se_sess->sess_wait_list, se_cmd_list) |
a17f091d NB |
2475 | se_cmd->cmd_wait_set = 1; |
2476 | ||
2477 | spin_unlock_irqrestore(&se_sess->sess_cmd_lock, flags); | |
2478 | } | |
1c7b13fe | 2479 | EXPORT_SYMBOL(target_sess_cmd_list_set_waiting); |
a17f091d NB |
2480 | |
2481 | /* target_wait_for_sess_cmds - Wait for outstanding descriptors | |
2482 | * @se_sess: session to wait for active I/O | |
a17f091d | 2483 | */ |
be646c2d | 2484 | void target_wait_for_sess_cmds(struct se_session *se_sess) |
a17f091d NB |
2485 | { |
2486 | struct se_cmd *se_cmd, *tmp_cmd; | |
9b31a328 | 2487 | unsigned long flags; |
a17f091d NB |
2488 | |
2489 | list_for_each_entry_safe(se_cmd, tmp_cmd, | |
9b31a328 | 2490 | &se_sess->sess_wait_list, se_cmd_list) { |
a17f091d NB |
2491 | list_del(&se_cmd->se_cmd_list); |
2492 | ||
2493 | pr_debug("Waiting for se_cmd: %p t_state: %d, fabric state:" | |
2494 | " %d\n", se_cmd, se_cmd->t_state, | |
2495 | se_cmd->se_tfo->get_cmd_state(se_cmd)); | |
2496 | ||
be646c2d JE |
2497 | wait_for_completion(&se_cmd->cmd_wait_comp); |
2498 | pr_debug("After cmd_wait_comp: se_cmd: %p t_state: %d" | |
2499 | " fabric state: %d\n", se_cmd, se_cmd->t_state, | |
2500 | se_cmd->se_tfo->get_cmd_state(se_cmd)); | |
a17f091d NB |
2501 | |
2502 | se_cmd->se_tfo->release_cmd(se_cmd); | |
2503 | } | |
9b31a328 NB |
2504 | |
2505 | spin_lock_irqsave(&se_sess->sess_cmd_lock, flags); | |
2506 | WARN_ON(!list_empty(&se_sess->sess_cmd_list)); | |
2507 | spin_unlock_irqrestore(&se_sess->sess_cmd_lock, flags); | |
2508 | ||
a17f091d NB |
2509 | } |
2510 | EXPORT_SYMBOL(target_wait_for_sess_cmds); | |
2511 | ||
5277797d | 2512 | static int transport_clear_lun_ref_thread(void *p) |
c66ac9db | 2513 | { |
8359cf43 | 2514 | struct se_lun *lun = p; |
c66ac9db | 2515 | |
5277797d NB |
2516 | percpu_ref_kill(&lun->lun_ref); |
2517 | ||
2518 | wait_for_completion(&lun->lun_ref_comp); | |
c66ac9db NB |
2519 | complete(&lun->lun_shutdown_comp); |
2520 | ||
2521 | return 0; | |
2522 | } | |
2523 | ||
5277797d | 2524 | int transport_clear_lun_ref(struct se_lun *lun) |
c66ac9db NB |
2525 | { |
2526 | struct task_struct *kt; | |
2527 | ||
5277797d | 2528 | kt = kthread_run(transport_clear_lun_ref_thread, lun, |
c66ac9db NB |
2529 | "tcm_cl_%u", lun->unpacked_lun); |
2530 | if (IS_ERR(kt)) { | |
6708bb27 | 2531 | pr_err("Unable to start clear_lun thread\n"); |
e3d6f909 | 2532 | return PTR_ERR(kt); |
c66ac9db NB |
2533 | } |
2534 | wait_for_completion(&lun->lun_shutdown_comp); | |
2535 | ||
2536 | return 0; | |
2537 | } | |
2538 | ||
d14921d6 NB |
2539 | /** |
2540 | * transport_wait_for_tasks - wait for completion to occur | |
2541 | * @cmd: command to wait | |
c66ac9db | 2542 | * |
d14921d6 NB |
2543 | * Called from frontend fabric context to wait for storage engine |
2544 | * to pause and/or release frontend generated struct se_cmd. | |
c66ac9db | 2545 | */ |
a17f091d | 2546 | bool transport_wait_for_tasks(struct se_cmd *cmd) |
c66ac9db NB |
2547 | { |
2548 | unsigned long flags; | |
2549 | ||
a1d8b49a | 2550 | spin_lock_irqsave(&cmd->t_state_lock, flags); |
c8e31f26 AG |
2551 | if (!(cmd->se_cmd_flags & SCF_SE_LUN_CMD) && |
2552 | !(cmd->se_cmd_flags & SCF_SCSI_TMR_CDB)) { | |
d14921d6 | 2553 | spin_unlock_irqrestore(&cmd->t_state_lock, flags); |
a17f091d | 2554 | return false; |
d14921d6 | 2555 | } |
cb4f4d3c | 2556 | |
c8e31f26 AG |
2557 | if (!(cmd->se_cmd_flags & SCF_SUPPORTED_SAM_OPCODE) && |
2558 | !(cmd->se_cmd_flags & SCF_SCSI_TMR_CDB)) { | |
d14921d6 | 2559 | spin_unlock_irqrestore(&cmd->t_state_lock, flags); |
a17f091d | 2560 | return false; |
d14921d6 | 2561 | } |
7d680f3b | 2562 | |
3d28934a | 2563 | if (!(cmd->transport_state & CMD_T_ACTIVE)) { |
d14921d6 | 2564 | spin_unlock_irqrestore(&cmd->t_state_lock, flags); |
a17f091d | 2565 | return false; |
d14921d6 | 2566 | } |
c66ac9db | 2567 | |
7d680f3b | 2568 | cmd->transport_state |= CMD_T_STOP; |
c66ac9db | 2569 | |
6708bb27 | 2570 | pr_debug("wait_for_tasks: Stopping %p ITT: 0x%08x" |
7d680f3b | 2571 | " i_state: %d, t_state: %d, CMD_T_STOP\n", |
f2da9dbd CH |
2572 | cmd, cmd->se_tfo->get_task_tag(cmd), |
2573 | cmd->se_tfo->get_cmd_state(cmd), cmd->t_state); | |
c66ac9db | 2574 | |
a1d8b49a | 2575 | spin_unlock_irqrestore(&cmd->t_state_lock, flags); |
c66ac9db | 2576 | |
a1d8b49a | 2577 | wait_for_completion(&cmd->t_transport_stop_comp); |
c66ac9db | 2578 | |
a1d8b49a | 2579 | spin_lock_irqsave(&cmd->t_state_lock, flags); |
7d680f3b | 2580 | cmd->transport_state &= ~(CMD_T_ACTIVE | CMD_T_STOP); |
c66ac9db | 2581 | |
35d1efe8 | 2582 | pr_debug("wait_for_tasks: Stopped wait_for_completion(" |
a1d8b49a | 2583 | "&cmd->t_transport_stop_comp) for ITT: 0x%08x\n", |
e3d6f909 | 2584 | cmd->se_tfo->get_task_tag(cmd)); |
c66ac9db | 2585 | |
d14921d6 | 2586 | spin_unlock_irqrestore(&cmd->t_state_lock, flags); |
a17f091d NB |
2587 | |
2588 | return true; | |
c66ac9db | 2589 | } |
d14921d6 | 2590 | EXPORT_SYMBOL(transport_wait_for_tasks); |
c66ac9db NB |
2591 | |
2592 | static int transport_get_sense_codes( | |
2593 | struct se_cmd *cmd, | |
2594 | u8 *asc, | |
2595 | u8 *ascq) | |
2596 | { | |
2597 | *asc = cmd->scsi_asc; | |
2598 | *ascq = cmd->scsi_ascq; | |
2599 | ||
2600 | return 0; | |
2601 | } | |
2602 | ||
76736db3 SG |
2603 | static |
2604 | void transport_err_sector_info(unsigned char *buffer, sector_t bad_sector) | |
2605 | { | |
2606 | /* Place failed LBA in sense data information descriptor 0. */ | |
2607 | buffer[SPC_ADD_SENSE_LEN_OFFSET] = 0xc; | |
2608 | buffer[SPC_DESC_TYPE_OFFSET] = 0; /* Information */ | |
2609 | buffer[SPC_ADDITIONAL_DESC_LEN_OFFSET] = 0xa; | |
2610 | buffer[SPC_VALIDITY_OFFSET] = 0x80; | |
2611 | ||
2612 | /* Descriptor Information: failing sector */ | |
2613 | put_unaligned_be64(bad_sector, &buffer[12]); | |
2614 | } | |
2615 | ||
de103c93 CH |
2616 | int |
2617 | transport_send_check_condition_and_sense(struct se_cmd *cmd, | |
2618 | sense_reason_t reason, int from_transport) | |
c66ac9db NB |
2619 | { |
2620 | unsigned char *buffer = cmd->sense_buffer; | |
2621 | unsigned long flags; | |
c66ac9db NB |
2622 | u8 asc = 0, ascq = 0; |
2623 | ||
a1d8b49a | 2624 | spin_lock_irqsave(&cmd->t_state_lock, flags); |
c66ac9db | 2625 | if (cmd->se_cmd_flags & SCF_SENT_CHECK_CONDITION) { |
a1d8b49a | 2626 | spin_unlock_irqrestore(&cmd->t_state_lock, flags); |
c66ac9db NB |
2627 | return 0; |
2628 | } | |
2629 | cmd->se_cmd_flags |= SCF_SENT_CHECK_CONDITION; | |
a1d8b49a | 2630 | spin_unlock_irqrestore(&cmd->t_state_lock, flags); |
c66ac9db NB |
2631 | |
2632 | if (!reason && from_transport) | |
2633 | goto after_reason; | |
2634 | ||
2635 | if (!from_transport) | |
2636 | cmd->se_cmd_flags |= SCF_EMULATED_TASK_SENSE; | |
9c58b7dd | 2637 | |
c66ac9db NB |
2638 | /* |
2639 | * Actual SENSE DATA, see SPC-3 7.23.2 SPC_SENSE_KEY_OFFSET uses | |
2640 | * SENSE KEY values from include/scsi/scsi.h | |
2641 | */ | |
2642 | switch (reason) { | |
ba829137 HR |
2643 | case TCM_NO_SENSE: |
2644 | /* CURRENT ERROR */ | |
2645 | buffer[0] = 0x70; | |
2646 | buffer[SPC_ADD_SENSE_LEN_OFFSET] = 10; | |
2647 | /* Not Ready */ | |
2648 | buffer[SPC_SENSE_KEY_OFFSET] = NOT_READY; | |
2649 | /* NO ADDITIONAL SENSE INFORMATION */ | |
2650 | buffer[SPC_ASC_KEY_OFFSET] = 0; | |
2651 | buffer[SPC_ASCQ_KEY_OFFSET] = 0; | |
2652 | break; | |
c66ac9db | 2653 | case TCM_NON_EXISTENT_LUN: |
eb39d340 | 2654 | /* CURRENT ERROR */ |
9c58b7dd RD |
2655 | buffer[0] = 0x70; |
2656 | buffer[SPC_ADD_SENSE_LEN_OFFSET] = 10; | |
eb39d340 | 2657 | /* ILLEGAL REQUEST */ |
9c58b7dd | 2658 | buffer[SPC_SENSE_KEY_OFFSET] = ILLEGAL_REQUEST; |
eb39d340 | 2659 | /* LOGICAL UNIT NOT SUPPORTED */ |
9c58b7dd | 2660 | buffer[SPC_ASC_KEY_OFFSET] = 0x25; |
eb39d340 | 2661 | break; |
c66ac9db NB |
2662 | case TCM_UNSUPPORTED_SCSI_OPCODE: |
2663 | case TCM_SECTOR_COUNT_TOO_MANY: | |
2664 | /* CURRENT ERROR */ | |
9c58b7dd RD |
2665 | buffer[0] = 0x70; |
2666 | buffer[SPC_ADD_SENSE_LEN_OFFSET] = 10; | |
c66ac9db | 2667 | /* ILLEGAL REQUEST */ |
9c58b7dd | 2668 | buffer[SPC_SENSE_KEY_OFFSET] = ILLEGAL_REQUEST; |
c66ac9db | 2669 | /* INVALID COMMAND OPERATION CODE */ |
9c58b7dd | 2670 | buffer[SPC_ASC_KEY_OFFSET] = 0x20; |
c66ac9db NB |
2671 | break; |
2672 | case TCM_UNKNOWN_MODE_PAGE: | |
2673 | /* CURRENT ERROR */ | |
9c58b7dd RD |
2674 | buffer[0] = 0x70; |
2675 | buffer[SPC_ADD_SENSE_LEN_OFFSET] = 10; | |
c66ac9db | 2676 | /* ILLEGAL REQUEST */ |
9c58b7dd | 2677 | buffer[SPC_SENSE_KEY_OFFSET] = ILLEGAL_REQUEST; |
c66ac9db | 2678 | /* INVALID FIELD IN CDB */ |
9c58b7dd | 2679 | buffer[SPC_ASC_KEY_OFFSET] = 0x24; |
c66ac9db NB |
2680 | break; |
2681 | case TCM_CHECK_CONDITION_ABORT_CMD: | |
2682 | /* CURRENT ERROR */ | |
9c58b7dd RD |
2683 | buffer[0] = 0x70; |
2684 | buffer[SPC_ADD_SENSE_LEN_OFFSET] = 10; | |
c66ac9db | 2685 | /* ABORTED COMMAND */ |
9c58b7dd | 2686 | buffer[SPC_SENSE_KEY_OFFSET] = ABORTED_COMMAND; |
c66ac9db | 2687 | /* BUS DEVICE RESET FUNCTION OCCURRED */ |
9c58b7dd RD |
2688 | buffer[SPC_ASC_KEY_OFFSET] = 0x29; |
2689 | buffer[SPC_ASCQ_KEY_OFFSET] = 0x03; | |
c66ac9db NB |
2690 | break; |
2691 | case TCM_INCORRECT_AMOUNT_OF_DATA: | |
2692 | /* CURRENT ERROR */ | |
9c58b7dd RD |
2693 | buffer[0] = 0x70; |
2694 | buffer[SPC_ADD_SENSE_LEN_OFFSET] = 10; | |
c66ac9db | 2695 | /* ABORTED COMMAND */ |
9c58b7dd | 2696 | buffer[SPC_SENSE_KEY_OFFSET] = ABORTED_COMMAND; |
c66ac9db | 2697 | /* WRITE ERROR */ |
9c58b7dd | 2698 | buffer[SPC_ASC_KEY_OFFSET] = 0x0c; |
c66ac9db | 2699 | /* NOT ENOUGH UNSOLICITED DATA */ |
9c58b7dd | 2700 | buffer[SPC_ASCQ_KEY_OFFSET] = 0x0d; |
c66ac9db NB |
2701 | break; |
2702 | case TCM_INVALID_CDB_FIELD: | |
2703 | /* CURRENT ERROR */ | |
9c58b7dd RD |
2704 | buffer[0] = 0x70; |
2705 | buffer[SPC_ADD_SENSE_LEN_OFFSET] = 10; | |
9fbc8909 | 2706 | /* ILLEGAL REQUEST */ |
9c58b7dd | 2707 | buffer[SPC_SENSE_KEY_OFFSET] = ILLEGAL_REQUEST; |
c66ac9db | 2708 | /* INVALID FIELD IN CDB */ |
9c58b7dd | 2709 | buffer[SPC_ASC_KEY_OFFSET] = 0x24; |
c66ac9db NB |
2710 | break; |
2711 | case TCM_INVALID_PARAMETER_LIST: | |
2712 | /* CURRENT ERROR */ | |
9c58b7dd RD |
2713 | buffer[0] = 0x70; |
2714 | buffer[SPC_ADD_SENSE_LEN_OFFSET] = 10; | |
9fbc8909 | 2715 | /* ILLEGAL REQUEST */ |
9c58b7dd | 2716 | buffer[SPC_SENSE_KEY_OFFSET] = ILLEGAL_REQUEST; |
c66ac9db | 2717 | /* INVALID FIELD IN PARAMETER LIST */ |
9c58b7dd | 2718 | buffer[SPC_ASC_KEY_OFFSET] = 0x26; |
c66ac9db | 2719 | break; |
bb992e72 RD |
2720 | case TCM_PARAMETER_LIST_LENGTH_ERROR: |
2721 | /* CURRENT ERROR */ | |
2722 | buffer[0] = 0x70; | |
2723 | buffer[SPC_ADD_SENSE_LEN_OFFSET] = 10; | |
2724 | /* ILLEGAL REQUEST */ | |
2725 | buffer[SPC_SENSE_KEY_OFFSET] = ILLEGAL_REQUEST; | |
2726 | /* PARAMETER LIST LENGTH ERROR */ | |
2727 | buffer[SPC_ASC_KEY_OFFSET] = 0x1a; | |
2728 | break; | |
c66ac9db NB |
2729 | case TCM_UNEXPECTED_UNSOLICITED_DATA: |
2730 | /* CURRENT ERROR */ | |
9c58b7dd RD |
2731 | buffer[0] = 0x70; |
2732 | buffer[SPC_ADD_SENSE_LEN_OFFSET] = 10; | |
c66ac9db | 2733 | /* ABORTED COMMAND */ |
9c58b7dd | 2734 | buffer[SPC_SENSE_KEY_OFFSET] = ABORTED_COMMAND; |
c66ac9db | 2735 | /* WRITE ERROR */ |
9c58b7dd | 2736 | buffer[SPC_ASC_KEY_OFFSET] = 0x0c; |
c66ac9db | 2737 | /* UNEXPECTED_UNSOLICITED_DATA */ |
9c58b7dd | 2738 | buffer[SPC_ASCQ_KEY_OFFSET] = 0x0c; |
c66ac9db NB |
2739 | break; |
2740 | case TCM_SERVICE_CRC_ERROR: | |
2741 | /* CURRENT ERROR */ | |
9c58b7dd RD |
2742 | buffer[0] = 0x70; |
2743 | buffer[SPC_ADD_SENSE_LEN_OFFSET] = 10; | |
c66ac9db | 2744 | /* ABORTED COMMAND */ |
9c58b7dd | 2745 | buffer[SPC_SENSE_KEY_OFFSET] = ABORTED_COMMAND; |
c66ac9db | 2746 | /* PROTOCOL SERVICE CRC ERROR */ |
9c58b7dd | 2747 | buffer[SPC_ASC_KEY_OFFSET] = 0x47; |
c66ac9db | 2748 | /* N/A */ |
9c58b7dd | 2749 | buffer[SPC_ASCQ_KEY_OFFSET] = 0x05; |
c66ac9db NB |
2750 | break; |
2751 | case TCM_SNACK_REJECTED: | |
2752 | /* CURRENT ERROR */ | |
9c58b7dd RD |
2753 | buffer[0] = 0x70; |
2754 | buffer[SPC_ADD_SENSE_LEN_OFFSET] = 10; | |
c66ac9db | 2755 | /* ABORTED COMMAND */ |
9c58b7dd | 2756 | buffer[SPC_SENSE_KEY_OFFSET] = ABORTED_COMMAND; |
c66ac9db | 2757 | /* READ ERROR */ |
9c58b7dd | 2758 | buffer[SPC_ASC_KEY_OFFSET] = 0x11; |
c66ac9db | 2759 | /* FAILED RETRANSMISSION REQUEST */ |
9c58b7dd | 2760 | buffer[SPC_ASCQ_KEY_OFFSET] = 0x13; |
c66ac9db NB |
2761 | break; |
2762 | case TCM_WRITE_PROTECTED: | |
2763 | /* CURRENT ERROR */ | |
9c58b7dd RD |
2764 | buffer[0] = 0x70; |
2765 | buffer[SPC_ADD_SENSE_LEN_OFFSET] = 10; | |
c66ac9db | 2766 | /* DATA PROTECT */ |
9c58b7dd | 2767 | buffer[SPC_SENSE_KEY_OFFSET] = DATA_PROTECT; |
c66ac9db | 2768 | /* WRITE PROTECTED */ |
9c58b7dd | 2769 | buffer[SPC_ASC_KEY_OFFSET] = 0x27; |
c66ac9db | 2770 | break; |
e2397c70 RD |
2771 | case TCM_ADDRESS_OUT_OF_RANGE: |
2772 | /* CURRENT ERROR */ | |
9c58b7dd RD |
2773 | buffer[0] = 0x70; |
2774 | buffer[SPC_ADD_SENSE_LEN_OFFSET] = 10; | |
e2397c70 | 2775 | /* ILLEGAL REQUEST */ |
9c58b7dd | 2776 | buffer[SPC_SENSE_KEY_OFFSET] = ILLEGAL_REQUEST; |
e2397c70 | 2777 | /* LOGICAL BLOCK ADDRESS OUT OF RANGE */ |
9c58b7dd | 2778 | buffer[SPC_ASC_KEY_OFFSET] = 0x21; |
e2397c70 | 2779 | break; |
c66ac9db NB |
2780 | case TCM_CHECK_CONDITION_UNIT_ATTENTION: |
2781 | /* CURRENT ERROR */ | |
9c58b7dd RD |
2782 | buffer[0] = 0x70; |
2783 | buffer[SPC_ADD_SENSE_LEN_OFFSET] = 10; | |
c66ac9db | 2784 | /* UNIT ATTENTION */ |
9c58b7dd | 2785 | buffer[SPC_SENSE_KEY_OFFSET] = UNIT_ATTENTION; |
c66ac9db | 2786 | core_scsi3_ua_for_check_condition(cmd, &asc, &ascq); |
9c58b7dd RD |
2787 | buffer[SPC_ASC_KEY_OFFSET] = asc; |
2788 | buffer[SPC_ASCQ_KEY_OFFSET] = ascq; | |
c66ac9db NB |
2789 | break; |
2790 | case TCM_CHECK_CONDITION_NOT_READY: | |
2791 | /* CURRENT ERROR */ | |
9c58b7dd RD |
2792 | buffer[0] = 0x70; |
2793 | buffer[SPC_ADD_SENSE_LEN_OFFSET] = 10; | |
c66ac9db | 2794 | /* Not Ready */ |
9c58b7dd | 2795 | buffer[SPC_SENSE_KEY_OFFSET] = NOT_READY; |
c66ac9db | 2796 | transport_get_sense_codes(cmd, &asc, &ascq); |
9c58b7dd RD |
2797 | buffer[SPC_ASC_KEY_OFFSET] = asc; |
2798 | buffer[SPC_ASCQ_KEY_OFFSET] = ascq; | |
c66ac9db | 2799 | break; |
818b571c NB |
2800 | case TCM_MISCOMPARE_VERIFY: |
2801 | /* CURRENT ERROR */ | |
2802 | buffer[0] = 0x70; | |
2803 | buffer[SPC_ADD_SENSE_LEN_OFFSET] = 10; | |
2804 | buffer[SPC_SENSE_KEY_OFFSET] = MISCOMPARE; | |
2805 | /* MISCOMPARE DURING VERIFY OPERATION */ | |
2806 | buffer[SPC_ASC_KEY_OFFSET] = 0x1d; | |
2807 | buffer[SPC_ASCQ_KEY_OFFSET] = 0x00; | |
2808 | break; | |
fcc4f17b NB |
2809 | case TCM_LOGICAL_BLOCK_GUARD_CHECK_FAILED: |
2810 | /* CURRENT ERROR */ | |
2811 | buffer[0] = 0x70; | |
2812 | buffer[SPC_ADD_SENSE_LEN_OFFSET] = 10; | |
2813 | /* ILLEGAL REQUEST */ | |
2814 | buffer[SPC_SENSE_KEY_OFFSET] = ILLEGAL_REQUEST; | |
2815 | /* LOGICAL BLOCK GUARD CHECK FAILED */ | |
2816 | buffer[SPC_ASC_KEY_OFFSET] = 0x10; | |
2817 | buffer[SPC_ASCQ_KEY_OFFSET] = 0x01; | |
76736db3 | 2818 | transport_err_sector_info(buffer, cmd->bad_sector); |
fcc4f17b NB |
2819 | break; |
2820 | case TCM_LOGICAL_BLOCK_APP_TAG_CHECK_FAILED: | |
2821 | /* CURRENT ERROR */ | |
2822 | buffer[0] = 0x70; | |
2823 | buffer[SPC_ADD_SENSE_LEN_OFFSET] = 10; | |
2824 | /* ILLEGAL REQUEST */ | |
2825 | buffer[SPC_SENSE_KEY_OFFSET] = ILLEGAL_REQUEST; | |
2826 | /* LOGICAL BLOCK APPLICATION TAG CHECK FAILED */ | |
2827 | buffer[SPC_ASC_KEY_OFFSET] = 0x10; | |
2828 | buffer[SPC_ASCQ_KEY_OFFSET] = 0x02; | |
76736db3 | 2829 | transport_err_sector_info(buffer, cmd->bad_sector); |
fcc4f17b NB |
2830 | break; |
2831 | case TCM_LOGICAL_BLOCK_REF_TAG_CHECK_FAILED: | |
2832 | /* CURRENT ERROR */ | |
2833 | buffer[0] = 0x70; | |
2834 | buffer[SPC_ADD_SENSE_LEN_OFFSET] = 10; | |
2835 | /* ILLEGAL REQUEST */ | |
2836 | buffer[SPC_SENSE_KEY_OFFSET] = ILLEGAL_REQUEST; | |
2837 | /* LOGICAL BLOCK REFERENCE TAG CHECK FAILED */ | |
2838 | buffer[SPC_ASC_KEY_OFFSET] = 0x10; | |
2839 | buffer[SPC_ASCQ_KEY_OFFSET] = 0x03; | |
76736db3 | 2840 | transport_err_sector_info(buffer, cmd->bad_sector); |
fcc4f17b | 2841 | break; |
c66ac9db NB |
2842 | case TCM_LOGICAL_UNIT_COMMUNICATION_FAILURE: |
2843 | default: | |
2844 | /* CURRENT ERROR */ | |
9c58b7dd RD |
2845 | buffer[0] = 0x70; |
2846 | buffer[SPC_ADD_SENSE_LEN_OFFSET] = 10; | |
ad673282 JE |
2847 | /* |
2848 | * Returning ILLEGAL REQUEST would cause immediate IO errors on | |
2849 | * Solaris initiators. Returning NOT READY instead means the | |
2850 | * operations will be retried a finite number of times and we | |
2851 | * can survive intermittent errors. | |
2852 | */ | |
2853 | buffer[SPC_SENSE_KEY_OFFSET] = NOT_READY; | |
c66ac9db | 2854 | /* LOGICAL UNIT COMMUNICATION FAILURE */ |
18a9df42 | 2855 | buffer[SPC_ASC_KEY_OFFSET] = 0x08; |
c66ac9db NB |
2856 | break; |
2857 | } | |
2858 | /* | |
2859 | * This code uses linux/include/scsi/scsi.h SAM status codes! | |
2860 | */ | |
2861 | cmd->scsi_status = SAM_STAT_CHECK_CONDITION; | |
2862 | /* | |
2863 | * Automatically padded, this value is encoded in the fabric's | |
2864 | * data_length response PDU containing the SCSI defined sense data. | |
2865 | */ | |
9c58b7dd | 2866 | cmd->scsi_sense_length = TRANSPORT_SENSE_BUFFER; |
c66ac9db NB |
2867 | |
2868 | after_reason: | |
e5c0d6ad | 2869 | trace_target_cmd_complete(cmd); |
07bde79a | 2870 | return cmd->se_tfo->queue_status(cmd); |
c66ac9db NB |
2871 | } |
2872 | EXPORT_SYMBOL(transport_send_check_condition_and_sense); | |
2873 | ||
2874 | int transport_check_aborted_status(struct se_cmd *cmd, int send_status) | |
2875 | { | |
c18bc7d8 RD |
2876 | if (!(cmd->transport_state & CMD_T_ABORTED)) |
2877 | return 0; | |
c66ac9db | 2878 | |
68259b5a AL |
2879 | /* |
2880 | * If cmd has been aborted but either no status is to be sent or it has | |
2881 | * already been sent, just return | |
2882 | */ | |
2883 | if (!send_status || !(cmd->se_cmd_flags & SCF_SEND_DELAYED_TAS)) | |
c18bc7d8 | 2884 | return 1; |
8b1e1244 | 2885 | |
c18bc7d8 RD |
2886 | pr_debug("Sending delayed SAM_STAT_TASK_ABORTED status for CDB: 0x%02x ITT: 0x%08x\n", |
2887 | cmd->t_task_cdb[0], cmd->se_tfo->get_task_tag(cmd)); | |
8b1e1244 | 2888 | |
68259b5a | 2889 | cmd->se_cmd_flags &= ~SCF_SEND_DELAYED_TAS; |
29f4c090 | 2890 | cmd->scsi_status = SAM_STAT_TASK_ABORTED; |
e5c0d6ad | 2891 | trace_target_cmd_complete(cmd); |
c18bc7d8 RD |
2892 | cmd->se_tfo->queue_status(cmd); |
2893 | ||
2894 | return 1; | |
c66ac9db NB |
2895 | } |
2896 | EXPORT_SYMBOL(transport_check_aborted_status); | |
2897 | ||
2898 | void transport_send_task_abort(struct se_cmd *cmd) | |
2899 | { | |
c252f003 NB |
2900 | unsigned long flags; |
2901 | ||
2902 | spin_lock_irqsave(&cmd->t_state_lock, flags); | |
68259b5a | 2903 | if (cmd->se_cmd_flags & (SCF_SENT_CHECK_CONDITION)) { |
c252f003 NB |
2904 | spin_unlock_irqrestore(&cmd->t_state_lock, flags); |
2905 | return; | |
2906 | } | |
2907 | spin_unlock_irqrestore(&cmd->t_state_lock, flags); | |
2908 | ||
c66ac9db NB |
2909 | /* |
2910 | * If there are still expected incoming fabric WRITEs, we wait | |
2911 | * until until they have completed before sending a TASK_ABORTED | |
2912 | * response. This response with TASK_ABORTED status will be | |
2913 | * queued back to fabric module by transport_check_aborted_status(). | |
2914 | */ | |
2915 | if (cmd->data_direction == DMA_TO_DEVICE) { | |
e3d6f909 | 2916 | if (cmd->se_tfo->write_pending_status(cmd) != 0) { |
7d680f3b | 2917 | cmd->transport_state |= CMD_T_ABORTED; |
68259b5a | 2918 | cmd->se_cmd_flags |= SCF_SEND_DELAYED_TAS; |
29f4c090 | 2919 | return; |
c66ac9db NB |
2920 | } |
2921 | } | |
2922 | cmd->scsi_status = SAM_STAT_TASK_ABORTED; | |
8b1e1244 | 2923 | |
72b59d6e RD |
2924 | transport_lun_remove_cmd(cmd); |
2925 | ||
6708bb27 | 2926 | pr_debug("Setting SAM_STAT_TASK_ABORTED status for CDB: 0x%02x," |
a1d8b49a | 2927 | " ITT: 0x%08x\n", cmd->t_task_cdb[0], |
e3d6f909 | 2928 | cmd->se_tfo->get_task_tag(cmd)); |
8b1e1244 | 2929 | |
e5c0d6ad | 2930 | trace_target_cmd_complete(cmd); |
e3d6f909 | 2931 | cmd->se_tfo->queue_status(cmd); |
c66ac9db NB |
2932 | } |
2933 | ||
af877292 | 2934 | static void target_tmr_work(struct work_struct *work) |
c66ac9db | 2935 | { |
af877292 | 2936 | struct se_cmd *cmd = container_of(work, struct se_cmd, work); |
5951146d | 2937 | struct se_device *dev = cmd->se_dev; |
c66ac9db NB |
2938 | struct se_tmr_req *tmr = cmd->se_tmr_req; |
2939 | int ret; | |
2940 | ||
2941 | switch (tmr->function) { | |
5c6cd613 | 2942 | case TMR_ABORT_TASK: |
3d28934a | 2943 | core_tmr_abort_task(dev, tmr, cmd->se_sess); |
c66ac9db | 2944 | break; |
5c6cd613 NB |
2945 | case TMR_ABORT_TASK_SET: |
2946 | case TMR_CLEAR_ACA: | |
2947 | case TMR_CLEAR_TASK_SET: | |
c66ac9db NB |
2948 | tmr->response = TMR_TASK_MGMT_FUNCTION_NOT_SUPPORTED; |
2949 | break; | |
5c6cd613 | 2950 | case TMR_LUN_RESET: |
c66ac9db NB |
2951 | ret = core_tmr_lun_reset(dev, tmr, NULL, NULL); |
2952 | tmr->response = (!ret) ? TMR_FUNCTION_COMPLETE : | |
2953 | TMR_FUNCTION_REJECTED; | |
2954 | break; | |
5c6cd613 | 2955 | case TMR_TARGET_WARM_RESET: |
c66ac9db NB |
2956 | tmr->response = TMR_FUNCTION_REJECTED; |
2957 | break; | |
5c6cd613 | 2958 | case TMR_TARGET_COLD_RESET: |
c66ac9db NB |
2959 | tmr->response = TMR_FUNCTION_REJECTED; |
2960 | break; | |
c66ac9db | 2961 | default: |
6708bb27 | 2962 | pr_err("Uknown TMR function: 0x%02x.\n", |
c66ac9db NB |
2963 | tmr->function); |
2964 | tmr->response = TMR_FUNCTION_REJECTED; | |
2965 | break; | |
2966 | } | |
2967 | ||
2968 | cmd->t_state = TRANSPORT_ISTATE_PROCESSING; | |
e3d6f909 | 2969 | cmd->se_tfo->queue_tm_rsp(cmd); |
c66ac9db | 2970 | |
b7b8bef7 | 2971 | transport_cmd_check_stop_to_fabric(cmd); |
c66ac9db NB |
2972 | } |
2973 | ||
af877292 CH |
2974 | int transport_generic_handle_tmr( |
2975 | struct se_cmd *cmd) | |
c66ac9db | 2976 | { |
f15e9cd9 NB |
2977 | unsigned long flags; |
2978 | ||
2979 | spin_lock_irqsave(&cmd->t_state_lock, flags); | |
2980 | cmd->transport_state |= CMD_T_ACTIVE; | |
2981 | spin_unlock_irqrestore(&cmd->t_state_lock, flags); | |
2982 | ||
af877292 CH |
2983 | INIT_WORK(&cmd->work, target_tmr_work); |
2984 | queue_work(cmd->se_dev->tmr_wq, &cmd->work); | |
c66ac9db NB |
2985 | return 0; |
2986 | } | |
af877292 | 2987 | EXPORT_SYMBOL(transport_generic_handle_tmr); |