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e48354ce NB |
1 | /******************************************************************************* |
2 | * This file contains main functions related to the iSCSI Target Core Driver. | |
3 | * | |
4c76251e | 4 | * (c) Copyright 2007-2013 Datera, Inc. |
e48354ce NB |
5 | * |
6 | * Author: Nicholas A. Bellinger <nab@linux-iscsi.org> | |
7 | * | |
8 | * This program is free software; you can redistribute it and/or modify | |
9 | * it under the terms of the GNU General Public License as published by | |
10 | * the Free Software Foundation; either version 2 of the License, or | |
11 | * (at your option) any later version. | |
12 | * | |
13 | * This program is distributed in the hope that it will be useful, | |
14 | * but WITHOUT ANY WARRANTY; without even the implied warranty of | |
15 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
16 | * GNU General Public License for more details. | |
17 | ******************************************************************************/ | |
18 | ||
19 | #include <linux/string.h> | |
20 | #include <linux/kthread.h> | |
21 | #include <linux/crypto.h> | |
22 | #include <linux/completion.h> | |
827509e3 | 23 | #include <linux/module.h> |
40401530 | 24 | #include <linux/idr.h> |
e48354ce NB |
25 | #include <asm/unaligned.h> |
26 | #include <scsi/scsi_device.h> | |
27 | #include <scsi/iscsi_proto.h> | |
d28b1169 | 28 | #include <scsi/scsi_tcq.h> |
e48354ce | 29 | #include <target/target_core_base.h> |
c4795fb2 | 30 | #include <target/target_core_fabric.h> |
d28b1169 | 31 | #include <target/target_core_configfs.h> |
e48354ce NB |
32 | |
33 | #include "iscsi_target_core.h" | |
34 | #include "iscsi_target_parameters.h" | |
35 | #include "iscsi_target_seq_pdu_list.h" | |
36 | #include "iscsi_target_tq.h" | |
37 | #include "iscsi_target_configfs.h" | |
38 | #include "iscsi_target_datain_values.h" | |
39 | #include "iscsi_target_erl0.h" | |
40 | #include "iscsi_target_erl1.h" | |
41 | #include "iscsi_target_erl2.h" | |
42 | #include "iscsi_target_login.h" | |
43 | #include "iscsi_target_tmr.h" | |
44 | #include "iscsi_target_tpg.h" | |
45 | #include "iscsi_target_util.h" | |
46 | #include "iscsi_target.h" | |
47 | #include "iscsi_target_device.h" | |
48 | #include "iscsi_target_stat.h" | |
49 | ||
baa4d64b NB |
50 | #include <target/iscsi/iscsi_transport.h> |
51 | ||
e48354ce NB |
52 | static LIST_HEAD(g_tiqn_list); |
53 | static LIST_HEAD(g_np_list); | |
54 | static DEFINE_SPINLOCK(tiqn_lock); | |
55 | static DEFINE_SPINLOCK(np_lock); | |
56 | ||
57 | static struct idr tiqn_idr; | |
58 | struct idr sess_idr; | |
59 | struct mutex auth_id_lock; | |
60 | spinlock_t sess_idr_lock; | |
61 | ||
62 | struct iscsit_global *iscsit_global; | |
63 | ||
e48354ce NB |
64 | struct kmem_cache *lio_qr_cache; |
65 | struct kmem_cache *lio_dr_cache; | |
66 | struct kmem_cache *lio_ooo_cache; | |
67 | struct kmem_cache *lio_r2t_cache; | |
68 | ||
69 | static int iscsit_handle_immediate_data(struct iscsi_cmd *, | |
2ec5a8c1 | 70 | struct iscsi_scsi_req *, u32); |
e48354ce NB |
71 | |
72 | struct iscsi_tiqn *iscsit_get_tiqn_for_login(unsigned char *buf) | |
73 | { | |
74 | struct iscsi_tiqn *tiqn = NULL; | |
75 | ||
76 | spin_lock(&tiqn_lock); | |
77 | list_for_each_entry(tiqn, &g_tiqn_list, tiqn_list) { | |
78 | if (!strcmp(tiqn->tiqn, buf)) { | |
79 | ||
80 | spin_lock(&tiqn->tiqn_state_lock); | |
81 | if (tiqn->tiqn_state == TIQN_STATE_ACTIVE) { | |
82 | tiqn->tiqn_access_count++; | |
83 | spin_unlock(&tiqn->tiqn_state_lock); | |
84 | spin_unlock(&tiqn_lock); | |
85 | return tiqn; | |
86 | } | |
87 | spin_unlock(&tiqn->tiqn_state_lock); | |
88 | } | |
89 | } | |
90 | spin_unlock(&tiqn_lock); | |
91 | ||
92 | return NULL; | |
93 | } | |
94 | ||
95 | static int iscsit_set_tiqn_shutdown(struct iscsi_tiqn *tiqn) | |
96 | { | |
97 | spin_lock(&tiqn->tiqn_state_lock); | |
98 | if (tiqn->tiqn_state == TIQN_STATE_ACTIVE) { | |
99 | tiqn->tiqn_state = TIQN_STATE_SHUTDOWN; | |
100 | spin_unlock(&tiqn->tiqn_state_lock); | |
101 | return 0; | |
102 | } | |
103 | spin_unlock(&tiqn->tiqn_state_lock); | |
104 | ||
105 | return -1; | |
106 | } | |
107 | ||
108 | void iscsit_put_tiqn_for_login(struct iscsi_tiqn *tiqn) | |
109 | { | |
110 | spin_lock(&tiqn->tiqn_state_lock); | |
111 | tiqn->tiqn_access_count--; | |
112 | spin_unlock(&tiqn->tiqn_state_lock); | |
113 | } | |
114 | ||
115 | /* | |
116 | * Note that IQN formatting is expected to be done in userspace, and | |
117 | * no explict IQN format checks are done here. | |
118 | */ | |
119 | struct iscsi_tiqn *iscsit_add_tiqn(unsigned char *buf) | |
120 | { | |
121 | struct iscsi_tiqn *tiqn = NULL; | |
122 | int ret; | |
123 | ||
8f50c7f5 | 124 | if (strlen(buf) >= ISCSI_IQN_LEN) { |
e48354ce NB |
125 | pr_err("Target IQN exceeds %d bytes\n", |
126 | ISCSI_IQN_LEN); | |
127 | return ERR_PTR(-EINVAL); | |
128 | } | |
129 | ||
130 | tiqn = kzalloc(sizeof(struct iscsi_tiqn), GFP_KERNEL); | |
131 | if (!tiqn) { | |
132 | pr_err("Unable to allocate struct iscsi_tiqn\n"); | |
133 | return ERR_PTR(-ENOMEM); | |
134 | } | |
135 | ||
136 | sprintf(tiqn->tiqn, "%s", buf); | |
137 | INIT_LIST_HEAD(&tiqn->tiqn_list); | |
138 | INIT_LIST_HEAD(&tiqn->tiqn_tpg_list); | |
139 | spin_lock_init(&tiqn->tiqn_state_lock); | |
140 | spin_lock_init(&tiqn->tiqn_tpg_lock); | |
141 | spin_lock_init(&tiqn->sess_err_stats.lock); | |
142 | spin_lock_init(&tiqn->login_stats.lock); | |
143 | spin_lock_init(&tiqn->logout_stats.lock); | |
144 | ||
e48354ce NB |
145 | tiqn->tiqn_state = TIQN_STATE_ACTIVE; |
146 | ||
c9365bd0 | 147 | idr_preload(GFP_KERNEL); |
e48354ce | 148 | spin_lock(&tiqn_lock); |
c9365bd0 TH |
149 | |
150 | ret = idr_alloc(&tiqn_idr, NULL, 0, 0, GFP_NOWAIT); | |
e48354ce | 151 | if (ret < 0) { |
c9365bd0 | 152 | pr_err("idr_alloc() failed for tiqn->tiqn_index\n"); |
e48354ce | 153 | spin_unlock(&tiqn_lock); |
c9365bd0 | 154 | idr_preload_end(); |
e48354ce NB |
155 | kfree(tiqn); |
156 | return ERR_PTR(ret); | |
157 | } | |
c9365bd0 | 158 | tiqn->tiqn_index = ret; |
e48354ce | 159 | list_add_tail(&tiqn->tiqn_list, &g_tiqn_list); |
c9365bd0 | 160 | |
e48354ce | 161 | spin_unlock(&tiqn_lock); |
c9365bd0 | 162 | idr_preload_end(); |
e48354ce NB |
163 | |
164 | pr_debug("CORE[0] - Added iSCSI Target IQN: %s\n", tiqn->tiqn); | |
165 | ||
166 | return tiqn; | |
167 | ||
168 | } | |
169 | ||
170 | static void iscsit_wait_for_tiqn(struct iscsi_tiqn *tiqn) | |
171 | { | |
172 | /* | |
173 | * Wait for accesses to said struct iscsi_tiqn to end. | |
174 | */ | |
175 | spin_lock(&tiqn->tiqn_state_lock); | |
176 | while (tiqn->tiqn_access_count != 0) { | |
177 | spin_unlock(&tiqn->tiqn_state_lock); | |
178 | msleep(10); | |
179 | spin_lock(&tiqn->tiqn_state_lock); | |
180 | } | |
181 | spin_unlock(&tiqn->tiqn_state_lock); | |
182 | } | |
183 | ||
184 | void iscsit_del_tiqn(struct iscsi_tiqn *tiqn) | |
185 | { | |
186 | /* | |
187 | * iscsit_set_tiqn_shutdown sets tiqn->tiqn_state = TIQN_STATE_SHUTDOWN | |
188 | * while holding tiqn->tiqn_state_lock. This means that all subsequent | |
189 | * attempts to access this struct iscsi_tiqn will fail from both transport | |
190 | * fabric and control code paths. | |
191 | */ | |
192 | if (iscsit_set_tiqn_shutdown(tiqn) < 0) { | |
193 | pr_err("iscsit_set_tiqn_shutdown() failed\n"); | |
194 | return; | |
195 | } | |
196 | ||
197 | iscsit_wait_for_tiqn(tiqn); | |
198 | ||
199 | spin_lock(&tiqn_lock); | |
200 | list_del(&tiqn->tiqn_list); | |
201 | idr_remove(&tiqn_idr, tiqn->tiqn_index); | |
202 | spin_unlock(&tiqn_lock); | |
203 | ||
204 | pr_debug("CORE[0] - Deleted iSCSI Target IQN: %s\n", | |
205 | tiqn->tiqn); | |
206 | kfree(tiqn); | |
207 | } | |
208 | ||
209 | int iscsit_access_np(struct iscsi_np *np, struct iscsi_portal_group *tpg) | |
210 | { | |
211 | int ret; | |
212 | /* | |
213 | * Determine if the network portal is accepting storage traffic. | |
214 | */ | |
215 | spin_lock_bh(&np->np_thread_lock); | |
216 | if (np->np_thread_state != ISCSI_NP_THREAD_ACTIVE) { | |
217 | spin_unlock_bh(&np->np_thread_lock); | |
218 | return -1; | |
219 | } | |
e48354ce NB |
220 | spin_unlock_bh(&np->np_thread_lock); |
221 | /* | |
222 | * Determine if the portal group is accepting storage traffic. | |
223 | */ | |
224 | spin_lock_bh(&tpg->tpg_state_lock); | |
225 | if (tpg->tpg_state != TPG_STATE_ACTIVE) { | |
226 | spin_unlock_bh(&tpg->tpg_state_lock); | |
227 | return -1; | |
228 | } | |
229 | spin_unlock_bh(&tpg->tpg_state_lock); | |
230 | ||
231 | /* | |
232 | * Here we serialize access across the TIQN+TPG Tuple. | |
233 | */ | |
a91eb7d9 | 234 | ret = down_interruptible(&tpg->np_login_sem); |
e48354ce NB |
235 | if ((ret != 0) || signal_pending(current)) |
236 | return -1; | |
237 | ||
a91eb7d9 NB |
238 | spin_lock_bh(&tpg->tpg_state_lock); |
239 | if (tpg->tpg_state != TPG_STATE_ACTIVE) { | |
240 | spin_unlock_bh(&tpg->tpg_state_lock); | |
241 | up(&tpg->np_login_sem); | |
242 | return -1; | |
243 | } | |
244 | spin_unlock_bh(&tpg->tpg_state_lock); | |
e48354ce NB |
245 | |
246 | return 0; | |
247 | } | |
248 | ||
a91eb7d9 NB |
249 | void iscsit_login_kref_put(struct kref *kref) |
250 | { | |
251 | struct iscsi_tpg_np *tpg_np = container_of(kref, | |
252 | struct iscsi_tpg_np, tpg_np_kref); | |
253 | ||
254 | complete(&tpg_np->tpg_np_comp); | |
255 | } | |
256 | ||
257 | int iscsit_deaccess_np(struct iscsi_np *np, struct iscsi_portal_group *tpg, | |
258 | struct iscsi_tpg_np *tpg_np) | |
e48354ce NB |
259 | { |
260 | struct iscsi_tiqn *tiqn = tpg->tpg_tiqn; | |
261 | ||
a91eb7d9 | 262 | up(&tpg->np_login_sem); |
e48354ce | 263 | |
a91eb7d9 NB |
264 | if (tpg_np) |
265 | kref_put(&tpg_np->tpg_np_kref, iscsit_login_kref_put); | |
e48354ce NB |
266 | |
267 | if (tiqn) | |
268 | iscsit_put_tiqn_for_login(tiqn); | |
269 | ||
270 | return 0; | |
271 | } | |
272 | ||
05b96892 | 273 | bool iscsit_check_np_match( |
e48354ce | 274 | struct __kernel_sockaddr_storage *sockaddr, |
05b96892 | 275 | struct iscsi_np *np, |
e48354ce NB |
276 | int network_transport) |
277 | { | |
278 | struct sockaddr_in *sock_in, *sock_in_e; | |
279 | struct sockaddr_in6 *sock_in6, *sock_in6_e; | |
05b96892 | 280 | bool ip_match = false; |
e48354ce NB |
281 | u16 port; |
282 | ||
05b96892 NB |
283 | if (sockaddr->ss_family == AF_INET6) { |
284 | sock_in6 = (struct sockaddr_in6 *)sockaddr; | |
285 | sock_in6_e = (struct sockaddr_in6 *)&np->np_sockaddr; | |
286 | ||
287 | if (!memcmp(&sock_in6->sin6_addr.in6_u, | |
288 | &sock_in6_e->sin6_addr.in6_u, | |
289 | sizeof(struct in6_addr))) | |
290 | ip_match = true; | |
291 | ||
292 | port = ntohs(sock_in6->sin6_port); | |
293 | } else { | |
294 | sock_in = (struct sockaddr_in *)sockaddr; | |
295 | sock_in_e = (struct sockaddr_in *)&np->np_sockaddr; | |
296 | ||
297 | if (sock_in->sin_addr.s_addr == sock_in_e->sin_addr.s_addr) | |
298 | ip_match = true; | |
299 | ||
300 | port = ntohs(sock_in->sin_port); | |
301 | } | |
302 | ||
303 | if ((ip_match == true) && (np->np_port == port) && | |
304 | (np->np_network_transport == network_transport)) | |
305 | return true; | |
306 | ||
307 | return false; | |
308 | } | |
309 | ||
310 | static struct iscsi_np *iscsit_get_np( | |
311 | struct __kernel_sockaddr_storage *sockaddr, | |
312 | int network_transport) | |
313 | { | |
314 | struct iscsi_np *np; | |
315 | bool match; | |
316 | ||
e48354ce NB |
317 | spin_lock_bh(&np_lock); |
318 | list_for_each_entry(np, &g_np_list, np_list) { | |
319 | spin_lock(&np->np_thread_lock); | |
320 | if (np->np_thread_state != ISCSI_NP_THREAD_ACTIVE) { | |
321 | spin_unlock(&np->np_thread_lock); | |
322 | continue; | |
323 | } | |
324 | ||
05b96892 NB |
325 | match = iscsit_check_np_match(sockaddr, np, network_transport); |
326 | if (match == true) { | |
e48354ce NB |
327 | /* |
328 | * Increment the np_exports reference count now to | |
329 | * prevent iscsit_del_np() below from being called | |
330 | * while iscsi_tpg_add_network_portal() is called. | |
331 | */ | |
332 | np->np_exports++; | |
333 | spin_unlock(&np->np_thread_lock); | |
334 | spin_unlock_bh(&np_lock); | |
335 | return np; | |
336 | } | |
337 | spin_unlock(&np->np_thread_lock); | |
338 | } | |
339 | spin_unlock_bh(&np_lock); | |
340 | ||
341 | return NULL; | |
342 | } | |
343 | ||
344 | struct iscsi_np *iscsit_add_np( | |
345 | struct __kernel_sockaddr_storage *sockaddr, | |
346 | char *ip_str, | |
347 | int network_transport) | |
348 | { | |
349 | struct sockaddr_in *sock_in; | |
350 | struct sockaddr_in6 *sock_in6; | |
351 | struct iscsi_np *np; | |
352 | int ret; | |
353 | /* | |
354 | * Locate the existing struct iscsi_np if already active.. | |
355 | */ | |
356 | np = iscsit_get_np(sockaddr, network_transport); | |
357 | if (np) | |
358 | return np; | |
359 | ||
360 | np = kzalloc(sizeof(struct iscsi_np), GFP_KERNEL); | |
361 | if (!np) { | |
362 | pr_err("Unable to allocate memory for struct iscsi_np\n"); | |
363 | return ERR_PTR(-ENOMEM); | |
364 | } | |
365 | ||
366 | np->np_flags |= NPF_IP_NETWORK; | |
367 | if (sockaddr->ss_family == AF_INET6) { | |
368 | sock_in6 = (struct sockaddr_in6 *)sockaddr; | |
369 | snprintf(np->np_ip, IPV6_ADDRESS_SPACE, "%s", ip_str); | |
370 | np->np_port = ntohs(sock_in6->sin6_port); | |
371 | } else { | |
372 | sock_in = (struct sockaddr_in *)sockaddr; | |
373 | sprintf(np->np_ip, "%s", ip_str); | |
374 | np->np_port = ntohs(sock_in->sin_port); | |
375 | } | |
376 | ||
377 | np->np_network_transport = network_transport; | |
378 | spin_lock_init(&np->np_thread_lock); | |
379 | init_completion(&np->np_restart_comp); | |
380 | INIT_LIST_HEAD(&np->np_list); | |
381 | ||
382 | ret = iscsi_target_setup_login_socket(np, sockaddr); | |
383 | if (ret != 0) { | |
384 | kfree(np); | |
385 | return ERR_PTR(ret); | |
386 | } | |
387 | ||
388 | np->np_thread = kthread_run(iscsi_target_login_thread, np, "iscsi_np"); | |
389 | if (IS_ERR(np->np_thread)) { | |
390 | pr_err("Unable to create kthread: iscsi_np\n"); | |
391 | ret = PTR_ERR(np->np_thread); | |
392 | kfree(np); | |
393 | return ERR_PTR(ret); | |
394 | } | |
395 | /* | |
396 | * Increment the np_exports reference count now to prevent | |
397 | * iscsit_del_np() below from being run while a new call to | |
398 | * iscsi_tpg_add_network_portal() for a matching iscsi_np is | |
399 | * active. We don't need to hold np->np_thread_lock at this | |
400 | * point because iscsi_np has not been added to g_np_list yet. | |
401 | */ | |
402 | np->np_exports = 1; | |
403 | ||
404 | spin_lock_bh(&np_lock); | |
405 | list_add_tail(&np->np_list, &g_np_list); | |
406 | spin_unlock_bh(&np_lock); | |
407 | ||
408 | pr_debug("CORE[0] - Added Network Portal: %s:%hu on %s\n", | |
baa4d64b | 409 | np->np_ip, np->np_port, np->np_transport->name); |
e48354ce NB |
410 | |
411 | return np; | |
412 | } | |
413 | ||
414 | int iscsit_reset_np_thread( | |
415 | struct iscsi_np *np, | |
416 | struct iscsi_tpg_np *tpg_np, | |
a91eb7d9 NB |
417 | struct iscsi_portal_group *tpg, |
418 | bool shutdown) | |
e48354ce NB |
419 | { |
420 | spin_lock_bh(&np->np_thread_lock); | |
e48354ce NB |
421 | if (np->np_thread_state == ISCSI_NP_THREAD_INACTIVE) { |
422 | spin_unlock_bh(&np->np_thread_lock); | |
423 | return 0; | |
424 | } | |
425 | np->np_thread_state = ISCSI_NP_THREAD_RESET; | |
426 | ||
427 | if (np->np_thread) { | |
428 | spin_unlock_bh(&np->np_thread_lock); | |
429 | send_sig(SIGINT, np->np_thread, 1); | |
430 | wait_for_completion(&np->np_restart_comp); | |
431 | spin_lock_bh(&np->np_thread_lock); | |
432 | } | |
433 | spin_unlock_bh(&np->np_thread_lock); | |
434 | ||
a91eb7d9 NB |
435 | if (tpg_np && shutdown) { |
436 | kref_put(&tpg_np->tpg_np_kref, iscsit_login_kref_put); | |
437 | ||
438 | wait_for_completion(&tpg_np->tpg_np_comp); | |
439 | } | |
440 | ||
e48354ce NB |
441 | return 0; |
442 | } | |
443 | ||
baa4d64b | 444 | static void iscsit_free_np(struct iscsi_np *np) |
e48354ce | 445 | { |
bf6932f4 AV |
446 | if (np->np_socket) |
447 | sock_release(np->np_socket); | |
e48354ce NB |
448 | } |
449 | ||
450 | int iscsit_del_np(struct iscsi_np *np) | |
451 | { | |
452 | spin_lock_bh(&np->np_thread_lock); | |
453 | np->np_exports--; | |
454 | if (np->np_exports) { | |
455 | spin_unlock_bh(&np->np_thread_lock); | |
456 | return 0; | |
457 | } | |
458 | np->np_thread_state = ISCSI_NP_THREAD_SHUTDOWN; | |
459 | spin_unlock_bh(&np->np_thread_lock); | |
460 | ||
461 | if (np->np_thread) { | |
462 | /* | |
463 | * We need to send the signal to wakeup Linux/Net | |
464 | * which may be sleeping in sock_accept().. | |
465 | */ | |
466 | send_sig(SIGINT, np->np_thread, 1); | |
467 | kthread_stop(np->np_thread); | |
db6077fd | 468 | np->np_thread = NULL; |
e48354ce | 469 | } |
baa4d64b NB |
470 | |
471 | np->np_transport->iscsit_free_np(np); | |
e48354ce NB |
472 | |
473 | spin_lock_bh(&np_lock); | |
474 | list_del(&np->np_list); | |
475 | spin_unlock_bh(&np_lock); | |
476 | ||
477 | pr_debug("CORE[0] - Removed Network Portal: %s:%hu on %s\n", | |
baa4d64b | 478 | np->np_ip, np->np_port, np->np_transport->name); |
e48354ce | 479 | |
baa4d64b | 480 | iscsit_put_transport(np->np_transport); |
e48354ce NB |
481 | kfree(np); |
482 | return 0; | |
483 | } | |
484 | ||
2ec5a8c1 NB |
485 | static int iscsit_immediate_queue(struct iscsi_conn *, struct iscsi_cmd *, int); |
486 | static int iscsit_response_queue(struct iscsi_conn *, struct iscsi_cmd *, int); | |
487 | ||
488 | static int iscsit_queue_rsp(struct iscsi_conn *conn, struct iscsi_cmd *cmd) | |
489 | { | |
490 | iscsit_add_cmd_to_response_queue(cmd, cmd->conn, cmd->i_state); | |
491 | return 0; | |
492 | } | |
493 | ||
baa4d64b NB |
494 | static struct iscsit_transport iscsi_target_transport = { |
495 | .name = "iSCSI/TCP", | |
496 | .transport_type = ISCSI_TCP, | |
497 | .owner = NULL, | |
498 | .iscsit_setup_np = iscsit_setup_np, | |
499 | .iscsit_accept_np = iscsit_accept_np, | |
500 | .iscsit_free_np = iscsit_free_np, | |
501 | .iscsit_get_login_rx = iscsit_get_login_rx, | |
502 | .iscsit_put_login_tx = iscsit_put_login_tx, | |
3e1c81a9 | 503 | .iscsit_get_dataout = iscsit_build_r2ts_for_cmd, |
2ec5a8c1 NB |
504 | .iscsit_immediate_queue = iscsit_immediate_queue, |
505 | .iscsit_response_queue = iscsit_response_queue, | |
506 | .iscsit_queue_data_in = iscsit_queue_rsp, | |
507 | .iscsit_queue_status = iscsit_queue_rsp, | |
baa4d64b NB |
508 | }; |
509 | ||
e48354ce NB |
510 | static int __init iscsi_target_init_module(void) |
511 | { | |
512 | int ret = 0; | |
513 | ||
514 | pr_debug("iSCSI-Target "ISCSIT_VERSION"\n"); | |
515 | ||
516 | iscsit_global = kzalloc(sizeof(struct iscsit_global), GFP_KERNEL); | |
517 | if (!iscsit_global) { | |
518 | pr_err("Unable to allocate memory for iscsit_global\n"); | |
519 | return -1; | |
520 | } | |
521 | mutex_init(&auth_id_lock); | |
522 | spin_lock_init(&sess_idr_lock); | |
523 | idr_init(&tiqn_idr); | |
524 | idr_init(&sess_idr); | |
525 | ||
526 | ret = iscsi_target_register_configfs(); | |
527 | if (ret < 0) | |
528 | goto out; | |
529 | ||
530 | ret = iscsi_thread_set_init(); | |
531 | if (ret < 0) | |
532 | goto configfs_out; | |
533 | ||
534 | if (iscsi_allocate_thread_sets(TARGET_THREAD_SET_COUNT) != | |
535 | TARGET_THREAD_SET_COUNT) { | |
536 | pr_err("iscsi_allocate_thread_sets() returned" | |
537 | " unexpected value!\n"); | |
538 | goto ts_out1; | |
539 | } | |
540 | ||
e48354ce NB |
541 | lio_qr_cache = kmem_cache_create("lio_qr_cache", |
542 | sizeof(struct iscsi_queue_req), | |
543 | __alignof__(struct iscsi_queue_req), 0, NULL); | |
544 | if (!lio_qr_cache) { | |
545 | pr_err("nable to kmem_cache_create() for" | |
546 | " lio_qr_cache\n"); | |
d703ce2f | 547 | goto ts_out2; |
e48354ce NB |
548 | } |
549 | ||
550 | lio_dr_cache = kmem_cache_create("lio_dr_cache", | |
551 | sizeof(struct iscsi_datain_req), | |
552 | __alignof__(struct iscsi_datain_req), 0, NULL); | |
553 | if (!lio_dr_cache) { | |
554 | pr_err("Unable to kmem_cache_create() for" | |
555 | " lio_dr_cache\n"); | |
556 | goto qr_out; | |
557 | } | |
558 | ||
559 | lio_ooo_cache = kmem_cache_create("lio_ooo_cache", | |
560 | sizeof(struct iscsi_ooo_cmdsn), | |
561 | __alignof__(struct iscsi_ooo_cmdsn), 0, NULL); | |
562 | if (!lio_ooo_cache) { | |
563 | pr_err("Unable to kmem_cache_create() for" | |
564 | " lio_ooo_cache\n"); | |
565 | goto dr_out; | |
566 | } | |
567 | ||
568 | lio_r2t_cache = kmem_cache_create("lio_r2t_cache", | |
569 | sizeof(struct iscsi_r2t), __alignof__(struct iscsi_r2t), | |
570 | 0, NULL); | |
571 | if (!lio_r2t_cache) { | |
572 | pr_err("Unable to kmem_cache_create() for" | |
573 | " lio_r2t_cache\n"); | |
574 | goto ooo_out; | |
575 | } | |
576 | ||
baa4d64b NB |
577 | iscsit_register_transport(&iscsi_target_transport); |
578 | ||
e48354ce NB |
579 | if (iscsit_load_discovery_tpg() < 0) |
580 | goto r2t_out; | |
581 | ||
582 | return ret; | |
583 | r2t_out: | |
584 | kmem_cache_destroy(lio_r2t_cache); | |
585 | ooo_out: | |
586 | kmem_cache_destroy(lio_ooo_cache); | |
587 | dr_out: | |
588 | kmem_cache_destroy(lio_dr_cache); | |
589 | qr_out: | |
590 | kmem_cache_destroy(lio_qr_cache); | |
e48354ce NB |
591 | ts_out2: |
592 | iscsi_deallocate_thread_sets(); | |
593 | ts_out1: | |
594 | iscsi_thread_set_free(); | |
595 | configfs_out: | |
596 | iscsi_target_deregister_configfs(); | |
597 | out: | |
598 | kfree(iscsit_global); | |
599 | return -ENOMEM; | |
600 | } | |
601 | ||
602 | static void __exit iscsi_target_cleanup_module(void) | |
603 | { | |
604 | iscsi_deallocate_thread_sets(); | |
605 | iscsi_thread_set_free(); | |
606 | iscsit_release_discovery_tpg(); | |
baa4d64b | 607 | iscsit_unregister_transport(&iscsi_target_transport); |
e48354ce NB |
608 | kmem_cache_destroy(lio_qr_cache); |
609 | kmem_cache_destroy(lio_dr_cache); | |
610 | kmem_cache_destroy(lio_ooo_cache); | |
611 | kmem_cache_destroy(lio_r2t_cache); | |
612 | ||
613 | iscsi_target_deregister_configfs(); | |
614 | ||
615 | kfree(iscsit_global); | |
616 | } | |
617 | ||
8b1e1244 | 618 | static int iscsit_add_reject( |
ba159914 | 619 | struct iscsi_conn *conn, |
e48354ce | 620 | u8 reason, |
ba159914 | 621 | unsigned char *buf) |
e48354ce NB |
622 | { |
623 | struct iscsi_cmd *cmd; | |
e48354ce NB |
624 | |
625 | cmd = iscsit_allocate_cmd(conn, GFP_KERNEL); | |
626 | if (!cmd) | |
627 | return -1; | |
628 | ||
629 | cmd->iscsi_opcode = ISCSI_OP_REJECT; | |
ba159914 | 630 | cmd->reject_reason = reason; |
e48354ce | 631 | |
1c3d5794 | 632 | cmd->buf_ptr = kmemdup(buf, ISCSI_HDR_LEN, GFP_KERNEL); |
e48354ce NB |
633 | if (!cmd->buf_ptr) { |
634 | pr_err("Unable to allocate memory for cmd->buf_ptr\n"); | |
aafc9d15 | 635 | iscsit_free_cmd(cmd, false); |
e48354ce NB |
636 | return -1; |
637 | } | |
e48354ce NB |
638 | |
639 | spin_lock_bh(&conn->cmd_lock); | |
2fbb471e | 640 | list_add_tail(&cmd->i_conn_node, &conn->conn_cmd_list); |
e48354ce NB |
641 | spin_unlock_bh(&conn->cmd_lock); |
642 | ||
643 | cmd->i_state = ISTATE_SEND_REJECT; | |
644 | iscsit_add_cmd_to_response_queue(cmd, conn, cmd->i_state); | |
645 | ||
ba159914 | 646 | return -1; |
e48354ce NB |
647 | } |
648 | ||
ba159914 NB |
649 | static int iscsit_add_reject_from_cmd( |
650 | struct iscsi_cmd *cmd, | |
e48354ce | 651 | u8 reason, |
ba159914 NB |
652 | bool add_to_conn, |
653 | unsigned char *buf) | |
e48354ce NB |
654 | { |
655 | struct iscsi_conn *conn; | |
e48354ce NB |
656 | |
657 | if (!cmd->conn) { | |
658 | pr_err("cmd->conn is NULL for ITT: 0x%08x\n", | |
659 | cmd->init_task_tag); | |
660 | return -1; | |
661 | } | |
662 | conn = cmd->conn; | |
663 | ||
664 | cmd->iscsi_opcode = ISCSI_OP_REJECT; | |
ba159914 | 665 | cmd->reject_reason = reason; |
e48354ce | 666 | |
1c3d5794 | 667 | cmd->buf_ptr = kmemdup(buf, ISCSI_HDR_LEN, GFP_KERNEL); |
e48354ce NB |
668 | if (!cmd->buf_ptr) { |
669 | pr_err("Unable to allocate memory for cmd->buf_ptr\n"); | |
aafc9d15 | 670 | iscsit_free_cmd(cmd, false); |
e48354ce NB |
671 | return -1; |
672 | } | |
e48354ce NB |
673 | |
674 | if (add_to_conn) { | |
675 | spin_lock_bh(&conn->cmd_lock); | |
2fbb471e | 676 | list_add_tail(&cmd->i_conn_node, &conn->conn_cmd_list); |
e48354ce NB |
677 | spin_unlock_bh(&conn->cmd_lock); |
678 | } | |
679 | ||
680 | cmd->i_state = ISTATE_SEND_REJECT; | |
681 | iscsit_add_cmd_to_response_queue(cmd, conn, cmd->i_state); | |
3e1c81a9 NB |
682 | /* |
683 | * Perform the kref_put now if se_cmd has already been setup by | |
684 | * scsit_setup_scsi_cmd() | |
685 | */ | |
686 | if (cmd->se_cmd.se_tfo != NULL) { | |
687 | pr_debug("iscsi reject: calling target_put_sess_cmd >>>>>>\n"); | |
688 | target_put_sess_cmd(conn->sess->se_sess, &cmd->se_cmd); | |
689 | } | |
ba159914 NB |
690 | return -1; |
691 | } | |
e48354ce | 692 | |
ba159914 NB |
693 | static int iscsit_add_reject_cmd(struct iscsi_cmd *cmd, u8 reason, |
694 | unsigned char *buf) | |
695 | { | |
696 | return iscsit_add_reject_from_cmd(cmd, reason, true, buf); | |
697 | } | |
698 | ||
699 | int iscsit_reject_cmd(struct iscsi_cmd *cmd, u8 reason, unsigned char *buf) | |
700 | { | |
701 | return iscsit_add_reject_from_cmd(cmd, reason, false, buf); | |
e48354ce NB |
702 | } |
703 | ||
704 | /* | |
705 | * Map some portion of the allocated scatterlist to an iovec, suitable for | |
bfb79eac | 706 | * kernel sockets to copy data in/out. |
e48354ce NB |
707 | */ |
708 | static int iscsit_map_iovec( | |
709 | struct iscsi_cmd *cmd, | |
710 | struct kvec *iov, | |
711 | u32 data_offset, | |
712 | u32 data_length) | |
713 | { | |
714 | u32 i = 0; | |
715 | struct scatterlist *sg; | |
716 | unsigned int page_off; | |
717 | ||
718 | /* | |
bfb79eac | 719 | * We know each entry in t_data_sg contains a page. |
e48354ce | 720 | */ |
bfb79eac | 721 | sg = &cmd->se_cmd.t_data_sg[data_offset / PAGE_SIZE]; |
e48354ce NB |
722 | page_off = (data_offset % PAGE_SIZE); |
723 | ||
724 | cmd->first_data_sg = sg; | |
725 | cmd->first_data_sg_off = page_off; | |
726 | ||
727 | while (data_length) { | |
728 | u32 cur_len = min_t(u32, data_length, sg->length - page_off); | |
729 | ||
730 | iov[i].iov_base = kmap(sg_page(sg)) + sg->offset + page_off; | |
731 | iov[i].iov_len = cur_len; | |
732 | ||
733 | data_length -= cur_len; | |
734 | page_off = 0; | |
735 | sg = sg_next(sg); | |
736 | i++; | |
737 | } | |
738 | ||
739 | cmd->kmapped_nents = i; | |
740 | ||
741 | return i; | |
742 | } | |
743 | ||
744 | static void iscsit_unmap_iovec(struct iscsi_cmd *cmd) | |
745 | { | |
746 | u32 i; | |
747 | struct scatterlist *sg; | |
748 | ||
749 | sg = cmd->first_data_sg; | |
750 | ||
751 | for (i = 0; i < cmd->kmapped_nents; i++) | |
752 | kunmap(sg_page(&sg[i])); | |
753 | } | |
754 | ||
755 | static void iscsit_ack_from_expstatsn(struct iscsi_conn *conn, u32 exp_statsn) | |
756 | { | |
f56cbbb4 NB |
757 | LIST_HEAD(ack_list); |
758 | struct iscsi_cmd *cmd, *cmd_p; | |
e48354ce NB |
759 | |
760 | conn->exp_statsn = exp_statsn; | |
761 | ||
3e1c81a9 NB |
762 | if (conn->sess->sess_ops->RDMAExtensions) |
763 | return; | |
764 | ||
e48354ce | 765 | spin_lock_bh(&conn->cmd_lock); |
f56cbbb4 | 766 | list_for_each_entry_safe(cmd, cmd_p, &conn->conn_cmd_list, i_conn_node) { |
e48354ce NB |
767 | spin_lock(&cmd->istate_lock); |
768 | if ((cmd->i_state == ISTATE_SENT_STATUS) && | |
64c13330 | 769 | iscsi_sna_lt(cmd->stat_sn, exp_statsn)) { |
e48354ce NB |
770 | cmd->i_state = ISTATE_REMOVE; |
771 | spin_unlock(&cmd->istate_lock); | |
f56cbbb4 | 772 | list_move_tail(&cmd->i_conn_node, &ack_list); |
e48354ce NB |
773 | continue; |
774 | } | |
775 | spin_unlock(&cmd->istate_lock); | |
776 | } | |
777 | spin_unlock_bh(&conn->cmd_lock); | |
f56cbbb4 NB |
778 | |
779 | list_for_each_entry_safe(cmd, cmd_p, &ack_list, i_conn_node) { | |
780 | list_del(&cmd->i_conn_node); | |
781 | iscsit_free_cmd(cmd, false); | |
782 | } | |
e48354ce NB |
783 | } |
784 | ||
785 | static int iscsit_allocate_iovecs(struct iscsi_cmd *cmd) | |
786 | { | |
f80e8ed3 | 787 | u32 iov_count = max(1UL, DIV_ROUND_UP(cmd->se_cmd.data_length, PAGE_SIZE)); |
e48354ce | 788 | |
c0427f15 | 789 | iov_count += ISCSI_IOV_DATA_BUFFER; |
e48354ce NB |
790 | |
791 | cmd->iov_data = kzalloc(iov_count * sizeof(struct kvec), GFP_KERNEL); | |
792 | if (!cmd->iov_data) { | |
793 | pr_err("Unable to allocate cmd->iov_data\n"); | |
794 | return -ENOMEM; | |
795 | } | |
796 | ||
797 | cmd->orig_iov_data_count = iov_count; | |
798 | return 0; | |
799 | } | |
800 | ||
3e1c81a9 NB |
801 | int iscsit_setup_scsi_cmd(struct iscsi_conn *conn, struct iscsi_cmd *cmd, |
802 | unsigned char *buf) | |
e48354ce | 803 | { |
3e1c81a9 | 804 | int data_direction, payload_length; |
e48354ce | 805 | struct iscsi_scsi_req *hdr; |
d28b1169 AG |
806 | int iscsi_task_attr; |
807 | int sam_task_attr; | |
e48354ce | 808 | |
04f3b31b | 809 | atomic_long_inc(&conn->sess->cmd_pdus); |
e48354ce NB |
810 | |
811 | hdr = (struct iscsi_scsi_req *) buf; | |
812 | payload_length = ntoh24(hdr->dlength); | |
e48354ce NB |
813 | |
814 | /* FIXME; Add checks for AdditionalHeaderSegment */ | |
815 | ||
816 | if (!(hdr->flags & ISCSI_FLAG_CMD_WRITE) && | |
817 | !(hdr->flags & ISCSI_FLAG_CMD_FINAL)) { | |
818 | pr_err("ISCSI_FLAG_CMD_WRITE & ISCSI_FLAG_CMD_FINAL" | |
819 | " not set. Bad iSCSI Initiator.\n"); | |
ba159914 NB |
820 | return iscsit_add_reject_cmd(cmd, |
821 | ISCSI_REASON_BOOKMARK_INVALID, buf); | |
e48354ce NB |
822 | } |
823 | ||
824 | if (((hdr->flags & ISCSI_FLAG_CMD_READ) || | |
825 | (hdr->flags & ISCSI_FLAG_CMD_WRITE)) && !hdr->data_length) { | |
826 | /* | |
4454b66c NB |
827 | * From RFC-3720 Section 10.3.1: |
828 | * | |
829 | * "Either or both of R and W MAY be 1 when either the | |
830 | * Expected Data Transfer Length and/or Bidirectional Read | |
831 | * Expected Data Transfer Length are 0" | |
832 | * | |
833 | * For this case, go ahead and clear the unnecssary bits | |
834 | * to avoid any confusion with ->data_direction. | |
e48354ce | 835 | */ |
4454b66c NB |
836 | hdr->flags &= ~ISCSI_FLAG_CMD_READ; |
837 | hdr->flags &= ~ISCSI_FLAG_CMD_WRITE; | |
e48354ce | 838 | |
4454b66c | 839 | pr_warn("ISCSI_FLAG_CMD_READ or ISCSI_FLAG_CMD_WRITE" |
e48354ce | 840 | " set when Expected Data Transfer Length is 0 for" |
4454b66c | 841 | " CDB: 0x%02x, Fixing up flags\n", hdr->cdb[0]); |
e48354ce | 842 | } |
e48354ce NB |
843 | |
844 | if (!(hdr->flags & ISCSI_FLAG_CMD_READ) && | |
845 | !(hdr->flags & ISCSI_FLAG_CMD_WRITE) && (hdr->data_length != 0)) { | |
846 | pr_err("ISCSI_FLAG_CMD_READ and/or ISCSI_FLAG_CMD_WRITE" | |
847 | " MUST be set if Expected Data Transfer Length is not 0." | |
848 | " Bad iSCSI Initiator\n"); | |
ba159914 NB |
849 | return iscsit_add_reject_cmd(cmd, |
850 | ISCSI_REASON_BOOKMARK_INVALID, buf); | |
e48354ce NB |
851 | } |
852 | ||
853 | if ((hdr->flags & ISCSI_FLAG_CMD_READ) && | |
854 | (hdr->flags & ISCSI_FLAG_CMD_WRITE)) { | |
855 | pr_err("Bidirectional operations not supported!\n"); | |
ba159914 NB |
856 | return iscsit_add_reject_cmd(cmd, |
857 | ISCSI_REASON_BOOKMARK_INVALID, buf); | |
e48354ce NB |
858 | } |
859 | ||
860 | if (hdr->opcode & ISCSI_OP_IMMEDIATE) { | |
861 | pr_err("Illegally set Immediate Bit in iSCSI Initiator" | |
862 | " Scsi Command PDU.\n"); | |
ba159914 NB |
863 | return iscsit_add_reject_cmd(cmd, |
864 | ISCSI_REASON_BOOKMARK_INVALID, buf); | |
e48354ce NB |
865 | } |
866 | ||
867 | if (payload_length && !conn->sess->sess_ops->ImmediateData) { | |
868 | pr_err("ImmediateData=No but DataSegmentLength=%u," | |
869 | " protocol error.\n", payload_length); | |
ba159914 NB |
870 | return iscsit_add_reject_cmd(cmd, |
871 | ISCSI_REASON_PROTOCOL_ERROR, buf); | |
e48354ce NB |
872 | } |
873 | ||
ba159914 | 874 | if ((be32_to_cpu(hdr->data_length) == payload_length) && |
e48354ce NB |
875 | (!(hdr->flags & ISCSI_FLAG_CMD_FINAL))) { |
876 | pr_err("Expected Data Transfer Length and Length of" | |
877 | " Immediate Data are the same, but ISCSI_FLAG_CMD_FINAL" | |
878 | " bit is not set protocol error\n"); | |
ba159914 NB |
879 | return iscsit_add_reject_cmd(cmd, |
880 | ISCSI_REASON_PROTOCOL_ERROR, buf); | |
e48354ce NB |
881 | } |
882 | ||
50e5c87d | 883 | if (payload_length > be32_to_cpu(hdr->data_length)) { |
e48354ce NB |
884 | pr_err("DataSegmentLength: %u is greater than" |
885 | " EDTL: %u, protocol error.\n", payload_length, | |
886 | hdr->data_length); | |
ba159914 NB |
887 | return iscsit_add_reject_cmd(cmd, |
888 | ISCSI_REASON_PROTOCOL_ERROR, buf); | |
e48354ce NB |
889 | } |
890 | ||
21f5aa7e | 891 | if (payload_length > conn->conn_ops->MaxXmitDataSegmentLength) { |
e48354ce | 892 | pr_err("DataSegmentLength: %u is greater than" |
21f5aa7e NB |
893 | " MaxXmitDataSegmentLength: %u, protocol error.\n", |
894 | payload_length, conn->conn_ops->MaxXmitDataSegmentLength); | |
ba159914 NB |
895 | return iscsit_add_reject_cmd(cmd, |
896 | ISCSI_REASON_PROTOCOL_ERROR, buf); | |
e48354ce NB |
897 | } |
898 | ||
899 | if (payload_length > conn->sess->sess_ops->FirstBurstLength) { | |
900 | pr_err("DataSegmentLength: %u is greater than" | |
901 | " FirstBurstLength: %u, protocol error.\n", | |
902 | payload_length, conn->sess->sess_ops->FirstBurstLength); | |
ba159914 NB |
903 | return iscsit_add_reject_cmd(cmd, |
904 | ISCSI_REASON_BOOKMARK_INVALID, buf); | |
e48354ce NB |
905 | } |
906 | ||
907 | data_direction = (hdr->flags & ISCSI_FLAG_CMD_WRITE) ? DMA_TO_DEVICE : | |
908 | (hdr->flags & ISCSI_FLAG_CMD_READ) ? DMA_FROM_DEVICE : | |
909 | DMA_NONE; | |
910 | ||
d28b1169 | 911 | cmd->data_direction = data_direction; |
d28b1169 AG |
912 | iscsi_task_attr = hdr->flags & ISCSI_FLAG_CMD_ATTR_MASK; |
913 | /* | |
914 | * Figure out the SAM Task Attribute for the incoming SCSI CDB | |
915 | */ | |
916 | if ((iscsi_task_attr == ISCSI_ATTR_UNTAGGED) || | |
917 | (iscsi_task_attr == ISCSI_ATTR_SIMPLE)) | |
918 | sam_task_attr = MSG_SIMPLE_TAG; | |
919 | else if (iscsi_task_attr == ISCSI_ATTR_ORDERED) | |
920 | sam_task_attr = MSG_ORDERED_TAG; | |
921 | else if (iscsi_task_attr == ISCSI_ATTR_HEAD_OF_QUEUE) | |
922 | sam_task_attr = MSG_HEAD_TAG; | |
923 | else if (iscsi_task_attr == ISCSI_ATTR_ACA) | |
924 | sam_task_attr = MSG_ACA_TAG; | |
925 | else { | |
926 | pr_debug("Unknown iSCSI Task Attribute: 0x%02x, using" | |
927 | " MSG_SIMPLE_TAG\n", iscsi_task_attr); | |
928 | sam_task_attr = MSG_SIMPLE_TAG; | |
929 | } | |
930 | ||
e48354ce NB |
931 | cmd->iscsi_opcode = ISCSI_OP_SCSI_CMD; |
932 | cmd->i_state = ISTATE_NEW_CMD; | |
933 | cmd->immediate_cmd = ((hdr->opcode & ISCSI_OP_IMMEDIATE) ? 1 : 0); | |
934 | cmd->immediate_data = (payload_length) ? 1 : 0; | |
935 | cmd->unsolicited_data = ((!(hdr->flags & ISCSI_FLAG_CMD_FINAL) && | |
936 | (hdr->flags & ISCSI_FLAG_CMD_WRITE)) ? 1 : 0); | |
937 | if (cmd->unsolicited_data) | |
938 | cmd->cmd_flags |= ICF_NON_IMMEDIATE_UNSOLICITED_DATA; | |
939 | ||
940 | conn->sess->init_task_tag = cmd->init_task_tag = hdr->itt; | |
941 | if (hdr->flags & ISCSI_FLAG_CMD_READ) { | |
942 | spin_lock_bh(&conn->sess->ttt_lock); | |
943 | cmd->targ_xfer_tag = conn->sess->targ_xfer_tag++; | |
944 | if (cmd->targ_xfer_tag == 0xFFFFFFFF) | |
945 | cmd->targ_xfer_tag = conn->sess->targ_xfer_tag++; | |
946 | spin_unlock_bh(&conn->sess->ttt_lock); | |
947 | } else if (hdr->flags & ISCSI_FLAG_CMD_WRITE) | |
948 | cmd->targ_xfer_tag = 0xFFFFFFFF; | |
50e5c87d CH |
949 | cmd->cmd_sn = be32_to_cpu(hdr->cmdsn); |
950 | cmd->exp_stat_sn = be32_to_cpu(hdr->exp_statsn); | |
e48354ce NB |
951 | cmd->first_burst_len = payload_length; |
952 | ||
3e1c81a9 NB |
953 | if (!conn->sess->sess_ops->RDMAExtensions && |
954 | cmd->data_direction == DMA_FROM_DEVICE) { | |
e48354ce NB |
955 | struct iscsi_datain_req *dr; |
956 | ||
957 | dr = iscsit_allocate_datain_req(); | |
958 | if (!dr) | |
ba159914 NB |
959 | return iscsit_add_reject_cmd(cmd, |
960 | ISCSI_REASON_BOOKMARK_NO_RESOURCES, buf); | |
e48354ce NB |
961 | |
962 | iscsit_attach_datain_req(cmd, dr); | |
963 | } | |
964 | ||
065ca1e4 AG |
965 | /* |
966 | * Initialize struct se_cmd descriptor from target_core_mod infrastructure | |
967 | */ | |
968 | transport_init_se_cmd(&cmd->se_cmd, &lio_target_fabric_configfs->tf_ops, | |
50e5c87d CH |
969 | conn->sess->se_sess, be32_to_cpu(hdr->data_length), |
970 | cmd->data_direction, sam_task_attr, | |
971 | cmd->sense_buffer + 2); | |
065ca1e4 AG |
972 | |
973 | pr_debug("Got SCSI Command, ITT: 0x%08x, CmdSN: 0x%08x," | |
974 | " ExpXferLen: %u, Length: %u, CID: %hu\n", hdr->itt, | |
3e1c81a9 NB |
975 | hdr->cmdsn, be32_to_cpu(hdr->data_length), payload_length, |
976 | conn->cid); | |
977 | ||
978 | target_get_sess_cmd(conn->sess->se_sess, &cmd->se_cmd, true); | |
065ca1e4 | 979 | |
de103c93 CH |
980 | cmd->sense_reason = transport_lookup_cmd_lun(&cmd->se_cmd, |
981 | scsilun_to_int(&hdr->lun)); | |
982 | if (cmd->sense_reason) | |
983 | goto attach_cmd; | |
984 | ||
985 | cmd->sense_reason = target_setup_cmd_from_cdb(&cmd->se_cmd, hdr->cdb); | |
986 | if (cmd->sense_reason) { | |
987 | if (cmd->sense_reason == TCM_OUT_OF_RESOURCES) { | |
ba159914 NB |
988 | return iscsit_add_reject_cmd(cmd, |
989 | ISCSI_REASON_BOOKMARK_NO_RESOURCES, buf); | |
e48354ce | 990 | } |
de103c93 | 991 | |
e48354ce NB |
992 | goto attach_cmd; |
993 | } | |
a12f41f8 | 994 | |
de103c93 | 995 | if (iscsit_build_pdu_and_seq_lists(cmd, payload_length) < 0) { |
ba159914 NB |
996 | return iscsit_add_reject_cmd(cmd, |
997 | ISCSI_REASON_BOOKMARK_NO_RESOURCES, buf); | |
e48354ce NB |
998 | } |
999 | ||
1000 | attach_cmd: | |
1001 | spin_lock_bh(&conn->cmd_lock); | |
2fbb471e | 1002 | list_add_tail(&cmd->i_conn_node, &conn->conn_cmd_list); |
e48354ce NB |
1003 | spin_unlock_bh(&conn->cmd_lock); |
1004 | /* | |
1005 | * Check if we need to delay processing because of ALUA | |
1006 | * Active/NonOptimized primary access state.. | |
1007 | */ | |
1008 | core_alua_check_nonop_delay(&cmd->se_cmd); | |
bfb79eac | 1009 | |
3e1c81a9 NB |
1010 | return 0; |
1011 | } | |
1012 | EXPORT_SYMBOL(iscsit_setup_scsi_cmd); | |
de103c93 | 1013 | |
3e1c81a9 NB |
1014 | void iscsit_set_unsoliticed_dataout(struct iscsi_cmd *cmd) |
1015 | { | |
1016 | iscsit_set_dataout_sequence_values(cmd); | |
1017 | ||
1018 | spin_lock_bh(&cmd->dataout_timeout_lock); | |
1019 | iscsit_start_dataout_timer(cmd, cmd->conn); | |
1020 | spin_unlock_bh(&cmd->dataout_timeout_lock); | |
1021 | } | |
1022 | EXPORT_SYMBOL(iscsit_set_unsoliticed_dataout); | |
1023 | ||
1024 | int iscsit_process_scsi_cmd(struct iscsi_conn *conn, struct iscsi_cmd *cmd, | |
1025 | struct iscsi_scsi_req *hdr) | |
1026 | { | |
1027 | int cmdsn_ret = 0; | |
e48354ce NB |
1028 | /* |
1029 | * Check the CmdSN against ExpCmdSN/MaxCmdSN here if | |
1030 | * the Immediate Bit is not set, and no Immediate | |
1031 | * Data is attached. | |
1032 | * | |
1033 | * A PDU/CmdSN carrying Immediate Data can only | |
1034 | * be processed after the DataCRC has passed. | |
1035 | * If the DataCRC fails, the CmdSN MUST NOT | |
1036 | * be acknowledged. (See below) | |
1037 | */ | |
1038 | if (!cmd->immediate_data) { | |
561bf158 NB |
1039 | cmdsn_ret = iscsit_sequence_cmd(conn, cmd, |
1040 | (unsigned char *)hdr, hdr->cmdsn); | |
1041 | if (cmdsn_ret == CMDSN_ERROR_CANNOT_RECOVER) | |
1042 | return -1; | |
1043 | else if (cmdsn_ret == CMDSN_LOWER_THAN_EXP) { | |
3e1c81a9 | 1044 | target_put_sess_cmd(conn->sess->se_sess, &cmd->se_cmd); |
7e32da55 | 1045 | return 0; |
3e1c81a9 | 1046 | } |
e48354ce NB |
1047 | } |
1048 | ||
50e5c87d | 1049 | iscsit_ack_from_expstatsn(conn, be32_to_cpu(hdr->exp_statsn)); |
e48354ce NB |
1050 | |
1051 | /* | |
1052 | * If no Immediate Data is attached, it's OK to return now. | |
1053 | */ | |
1054 | if (!cmd->immediate_data) { | |
3e1c81a9 NB |
1055 | if (!cmd->sense_reason && cmd->unsolicited_data) |
1056 | iscsit_set_unsoliticed_dataout(cmd); | |
1057 | if (!cmd->sense_reason) | |
1058 | return 0; | |
e48354ce | 1059 | |
3e1c81a9 | 1060 | target_put_sess_cmd(conn->sess->se_sess, &cmd->se_cmd); |
e48354ce NB |
1061 | return 0; |
1062 | } | |
1063 | ||
1064 | /* | |
3e1c81a9 NB |
1065 | * Early CHECK_CONDITIONs with ImmediateData never make it to command |
1066 | * execution. These exceptions are processed in CmdSN order using | |
1067 | * iscsit_check_received_cmdsn() in iscsit_get_immediate_data() below. | |
e48354ce | 1068 | */ |
de103c93 | 1069 | if (cmd->sense_reason) { |
561bf158 NB |
1070 | if (cmd->reject_reason) |
1071 | return 0; | |
1072 | ||
3e1c81a9 | 1073 | return 1; |
e48354ce NB |
1074 | } |
1075 | /* | |
1076 | * Call directly into transport_generic_new_cmd() to perform | |
1077 | * the backend memory allocation. | |
1078 | */ | |
de103c93 | 1079 | cmd->sense_reason = transport_generic_new_cmd(&cmd->se_cmd); |
561bf158 | 1080 | if (cmd->sense_reason) |
3e1c81a9 | 1081 | return 1; |
e48354ce | 1082 | |
3e1c81a9 NB |
1083 | return 0; |
1084 | } | |
1085 | EXPORT_SYMBOL(iscsit_process_scsi_cmd); | |
1086 | ||
1087 | static int | |
1088 | iscsit_get_immediate_data(struct iscsi_cmd *cmd, struct iscsi_scsi_req *hdr, | |
1089 | bool dump_payload) | |
1090 | { | |
561bf158 | 1091 | struct iscsi_conn *conn = cmd->conn; |
3e1c81a9 NB |
1092 | int cmdsn_ret = 0, immed_ret = IMMEDIATE_DATA_NORMAL_OPERATION; |
1093 | /* | |
1094 | * Special case for Unsupported SAM WRITE Opcodes and ImmediateData=Yes. | |
1095 | */ | |
1096 | if (dump_payload == true) | |
1097 | goto after_immediate_data; | |
1098 | ||
1099 | immed_ret = iscsit_handle_immediate_data(cmd, hdr, | |
1100 | cmd->first_burst_len); | |
e48354ce NB |
1101 | after_immediate_data: |
1102 | if (immed_ret == IMMEDIATE_DATA_NORMAL_OPERATION) { | |
1103 | /* | |
1104 | * A PDU/CmdSN carrying Immediate Data passed | |
1105 | * DataCRC, check against ExpCmdSN/MaxCmdSN if | |
1106 | * Immediate Bit is not set. | |
1107 | */ | |
561bf158 NB |
1108 | cmdsn_ret = iscsit_sequence_cmd(cmd->conn, cmd, |
1109 | (unsigned char *)hdr, hdr->cmdsn); | |
9d86a2be | 1110 | if (cmdsn_ret == CMDSN_ERROR_CANNOT_RECOVER) |
561bf158 | 1111 | return -1; |
3e1c81a9 | 1112 | |
9d86a2be | 1113 | if (cmd->sense_reason || cmdsn_ret == CMDSN_LOWER_THAN_EXP) { |
561bf158 NB |
1114 | int rc; |
1115 | ||
1116 | rc = iscsit_dump_data_payload(cmd->conn, | |
1117 | cmd->first_burst_len, 1); | |
1118 | target_put_sess_cmd(conn->sess->se_sess, &cmd->se_cmd); | |
1119 | return rc; | |
3e1c81a9 NB |
1120 | } else if (cmd->unsolicited_data) |
1121 | iscsit_set_unsoliticed_dataout(cmd); | |
e48354ce | 1122 | |
e48354ce NB |
1123 | } else if (immed_ret == IMMEDIATE_DATA_ERL1_CRC_FAILURE) { |
1124 | /* | |
1125 | * Immediate Data failed DataCRC and ERL>=1, | |
1126 | * silently drop this PDU and let the initiator | |
1127 | * plug the CmdSN gap. | |
1128 | * | |
1129 | * FIXME: Send Unsolicited NOPIN with reserved | |
1130 | * TTT here to help the initiator figure out | |
1131 | * the missing CmdSN, although they should be | |
1132 | * intelligent enough to determine the missing | |
1133 | * CmdSN and issue a retry to plug the sequence. | |
1134 | */ | |
1135 | cmd->i_state = ISTATE_REMOVE; | |
3e1c81a9 | 1136 | iscsit_add_cmd_to_immediate_queue(cmd, cmd->conn, cmd->i_state); |
e48354ce NB |
1137 | } else /* immed_ret == IMMEDIATE_DATA_CANNOT_RECOVER */ |
1138 | return -1; | |
1139 | ||
1140 | return 0; | |
1141 | } | |
1142 | ||
3e1c81a9 NB |
1143 | static int |
1144 | iscsit_handle_scsi_cmd(struct iscsi_conn *conn, struct iscsi_cmd *cmd, | |
1145 | unsigned char *buf) | |
1146 | { | |
1147 | struct iscsi_scsi_req *hdr = (struct iscsi_scsi_req *)buf; | |
1148 | int rc, immed_data; | |
1149 | bool dump_payload = false; | |
1150 | ||
1151 | rc = iscsit_setup_scsi_cmd(conn, cmd, buf); | |
1152 | if (rc < 0) | |
561bf158 | 1153 | return 0; |
3e1c81a9 NB |
1154 | /* |
1155 | * Allocation iovecs needed for struct socket operations for | |
1156 | * traditional iSCSI block I/O. | |
1157 | */ | |
1158 | if (iscsit_allocate_iovecs(cmd) < 0) { | |
ba159914 NB |
1159 | return iscsit_add_reject_cmd(cmd, |
1160 | ISCSI_REASON_BOOKMARK_NO_RESOURCES, buf); | |
3e1c81a9 NB |
1161 | } |
1162 | immed_data = cmd->immediate_data; | |
1163 | ||
1164 | rc = iscsit_process_scsi_cmd(conn, cmd, hdr); | |
1165 | if (rc < 0) | |
1166 | return rc; | |
1167 | else if (rc > 0) | |
1168 | dump_payload = true; | |
1169 | ||
1170 | if (!immed_data) | |
1171 | return 0; | |
1172 | ||
1173 | return iscsit_get_immediate_data(cmd, hdr, dump_payload); | |
1174 | } | |
1175 | ||
e48354ce NB |
1176 | static u32 iscsit_do_crypto_hash_sg( |
1177 | struct hash_desc *hash, | |
1178 | struct iscsi_cmd *cmd, | |
1179 | u32 data_offset, | |
1180 | u32 data_length, | |
1181 | u32 padding, | |
1182 | u8 *pad_bytes) | |
1183 | { | |
1184 | u32 data_crc; | |
1185 | u32 i; | |
1186 | struct scatterlist *sg; | |
1187 | unsigned int page_off; | |
1188 | ||
1189 | crypto_hash_init(hash); | |
1190 | ||
1191 | sg = cmd->first_data_sg; | |
1192 | page_off = cmd->first_data_sg_off; | |
1193 | ||
1194 | i = 0; | |
1195 | while (data_length) { | |
1196 | u32 cur_len = min_t(u32, data_length, (sg[i].length - page_off)); | |
1197 | ||
1198 | crypto_hash_update(hash, &sg[i], cur_len); | |
1199 | ||
1200 | data_length -= cur_len; | |
1201 | page_off = 0; | |
1202 | i++; | |
1203 | } | |
1204 | ||
1205 | if (padding) { | |
1206 | struct scatterlist pad_sg; | |
1207 | ||
1208 | sg_init_one(&pad_sg, pad_bytes, padding); | |
1209 | crypto_hash_update(hash, &pad_sg, padding); | |
1210 | } | |
1211 | crypto_hash_final(hash, (u8 *) &data_crc); | |
1212 | ||
1213 | return data_crc; | |
1214 | } | |
1215 | ||
1216 | static void iscsit_do_crypto_hash_buf( | |
1217 | struct hash_desc *hash, | |
80690fdb | 1218 | const void *buf, |
e48354ce NB |
1219 | u32 payload_length, |
1220 | u32 padding, | |
1221 | u8 *pad_bytes, | |
1222 | u8 *data_crc) | |
1223 | { | |
1224 | struct scatterlist sg; | |
1225 | ||
1226 | crypto_hash_init(hash); | |
1227 | ||
8359cf43 | 1228 | sg_init_one(&sg, buf, payload_length); |
e48354ce NB |
1229 | crypto_hash_update(hash, &sg, payload_length); |
1230 | ||
1231 | if (padding) { | |
1232 | sg_init_one(&sg, pad_bytes, padding); | |
1233 | crypto_hash_update(hash, &sg, padding); | |
1234 | } | |
1235 | crypto_hash_final(hash, data_crc); | |
1236 | } | |
1237 | ||
3e1c81a9 NB |
1238 | int |
1239 | iscsit_check_dataout_hdr(struct iscsi_conn *conn, unsigned char *buf, | |
1240 | struct iscsi_cmd **out_cmd) | |
e48354ce | 1241 | { |
3e1c81a9 | 1242 | struct iscsi_data *hdr = (struct iscsi_data *)buf; |
e48354ce NB |
1243 | struct iscsi_cmd *cmd = NULL; |
1244 | struct se_cmd *se_cmd; | |
3e1c81a9 NB |
1245 | u32 payload_length = ntoh24(hdr->dlength); |
1246 | int rc; | |
e48354ce NB |
1247 | |
1248 | if (!payload_length) { | |
dbcbc95c NB |
1249 | pr_warn("DataOUT payload is ZERO, ignoring.\n"); |
1250 | return 0; | |
e48354ce NB |
1251 | } |
1252 | ||
1253 | /* iSCSI write */ | |
04f3b31b | 1254 | atomic_long_add(payload_length, &conn->sess->rx_data_octets); |
e48354ce | 1255 | |
21f5aa7e | 1256 | if (payload_length > conn->conn_ops->MaxXmitDataSegmentLength) { |
e48354ce | 1257 | pr_err("DataSegmentLength: %u is greater than" |
21f5aa7e NB |
1258 | " MaxXmitDataSegmentLength: %u\n", payload_length, |
1259 | conn->conn_ops->MaxXmitDataSegmentLength); | |
ba159914 NB |
1260 | return iscsit_add_reject(conn, ISCSI_REASON_PROTOCOL_ERROR, |
1261 | buf); | |
e48354ce NB |
1262 | } |
1263 | ||
1264 | cmd = iscsit_find_cmd_from_itt_or_dump(conn, hdr->itt, | |
1265 | payload_length); | |
1266 | if (!cmd) | |
1267 | return 0; | |
1268 | ||
1269 | pr_debug("Got DataOut ITT: 0x%08x, TTT: 0x%08x," | |
1270 | " DataSN: 0x%08x, Offset: %u, Length: %u, CID: %hu\n", | |
3e1c81a9 | 1271 | hdr->itt, hdr->ttt, hdr->datasn, ntohl(hdr->offset), |
e48354ce NB |
1272 | payload_length, conn->cid); |
1273 | ||
1274 | if (cmd->cmd_flags & ICF_GOT_LAST_DATAOUT) { | |
1275 | pr_err("Command ITT: 0x%08x received DataOUT after" | |
1276 | " last DataOUT received, dumping payload\n", | |
1277 | cmd->init_task_tag); | |
1278 | return iscsit_dump_data_payload(conn, payload_length, 1); | |
1279 | } | |
1280 | ||
1281 | if (cmd->data_direction != DMA_TO_DEVICE) { | |
1282 | pr_err("Command ITT: 0x%08x received DataOUT for a" | |
1283 | " NON-WRITE command.\n", cmd->init_task_tag); | |
ba159914 | 1284 | return iscsit_reject_cmd(cmd, ISCSI_REASON_PROTOCOL_ERROR, buf); |
e48354ce NB |
1285 | } |
1286 | se_cmd = &cmd->se_cmd; | |
1287 | iscsit_mod_dataout_timer(cmd); | |
1288 | ||
50e5c87d | 1289 | if ((be32_to_cpu(hdr->offset) + payload_length) > cmd->se_cmd.data_length) { |
e48354ce NB |
1290 | pr_err("DataOut Offset: %u, Length %u greater than" |
1291 | " iSCSI Command EDTL %u, protocol error.\n", | |
ebf1d95c | 1292 | hdr->offset, payload_length, cmd->se_cmd.data_length); |
ba159914 | 1293 | return iscsit_reject_cmd(cmd, ISCSI_REASON_BOOKMARK_INVALID, buf); |
e48354ce NB |
1294 | } |
1295 | ||
1296 | if (cmd->unsolicited_data) { | |
1297 | int dump_unsolicited_data = 0; | |
1298 | ||
1299 | if (conn->sess->sess_ops->InitialR2T) { | |
1300 | pr_err("Received unexpected unsolicited data" | |
1301 | " while InitialR2T=Yes, protocol error.\n"); | |
1302 | transport_send_check_condition_and_sense(&cmd->se_cmd, | |
1303 | TCM_UNEXPECTED_UNSOLICITED_DATA, 0); | |
1304 | return -1; | |
1305 | } | |
1306 | /* | |
1307 | * Special case for dealing with Unsolicited DataOUT | |
1308 | * and Unsupported SAM WRITE Opcodes and SE resource allocation | |
1309 | * failures; | |
1310 | */ | |
1311 | ||
1312 | /* Something's amiss if we're not in WRITE_PENDING state... */ | |
e48354ce | 1313 | WARN_ON(se_cmd->t_state != TRANSPORT_WRITE_PENDING); |
de103c93 | 1314 | if (!(se_cmd->se_cmd_flags & SCF_SUPPORTED_SAM_OPCODE)) |
e48354ce | 1315 | dump_unsolicited_data = 1; |
e48354ce NB |
1316 | |
1317 | if (dump_unsolicited_data) { | |
1318 | /* | |
1319 | * Check if a delayed TASK_ABORTED status needs to | |
1320 | * be sent now if the ISCSI_FLAG_CMD_FINAL has been | |
1321 | * received with the unsolicitied data out. | |
1322 | */ | |
1323 | if (hdr->flags & ISCSI_FLAG_CMD_FINAL) | |
1324 | iscsit_stop_dataout_timer(cmd); | |
1325 | ||
1326 | transport_check_aborted_status(se_cmd, | |
1327 | (hdr->flags & ISCSI_FLAG_CMD_FINAL)); | |
1328 | return iscsit_dump_data_payload(conn, payload_length, 1); | |
1329 | } | |
1330 | } else { | |
1331 | /* | |
1332 | * For the normal solicited data path: | |
1333 | * | |
1334 | * Check for a delayed TASK_ABORTED status and dump any | |
1335 | * incoming data out payload if one exists. Also, when the | |
1336 | * ISCSI_FLAG_CMD_FINAL is set to denote the end of the current | |
1337 | * data out sequence, we decrement outstanding_r2ts. Once | |
1338 | * outstanding_r2ts reaches zero, go ahead and send the delayed | |
1339 | * TASK_ABORTED status. | |
1340 | */ | |
7d680f3b | 1341 | if (se_cmd->transport_state & CMD_T_ABORTED) { |
e48354ce NB |
1342 | if (hdr->flags & ISCSI_FLAG_CMD_FINAL) |
1343 | if (--cmd->outstanding_r2ts < 1) { | |
1344 | iscsit_stop_dataout_timer(cmd); | |
1345 | transport_check_aborted_status( | |
1346 | se_cmd, 1); | |
1347 | } | |
1348 | ||
1349 | return iscsit_dump_data_payload(conn, payload_length, 1); | |
1350 | } | |
1351 | } | |
1352 | /* | |
1353 | * Preform DataSN, DataSequenceInOrder, DataPDUInOrder, and | |
1354 | * within-command recovery checks before receiving the payload. | |
1355 | */ | |
3e1c81a9 NB |
1356 | rc = iscsit_check_pre_dataout(cmd, buf); |
1357 | if (rc == DATAOUT_WITHIN_COMMAND_RECOVERY) | |
e48354ce | 1358 | return 0; |
3e1c81a9 | 1359 | else if (rc == DATAOUT_CANNOT_RECOVER) |
e48354ce NB |
1360 | return -1; |
1361 | ||
3e1c81a9 NB |
1362 | *out_cmd = cmd; |
1363 | return 0; | |
1364 | } | |
1365 | EXPORT_SYMBOL(iscsit_check_dataout_hdr); | |
1366 | ||
1367 | static int | |
1368 | iscsit_get_dataout(struct iscsi_conn *conn, struct iscsi_cmd *cmd, | |
1369 | struct iscsi_data *hdr) | |
1370 | { | |
1371 | struct kvec *iov; | |
1372 | u32 checksum, iov_count = 0, padding = 0, rx_got = 0, rx_size = 0; | |
1373 | u32 payload_length = ntoh24(hdr->dlength); | |
1374 | int iov_ret, data_crc_failed = 0; | |
1375 | ||
e48354ce NB |
1376 | rx_size += payload_length; |
1377 | iov = &cmd->iov_data[0]; | |
1378 | ||
50e5c87d CH |
1379 | iov_ret = iscsit_map_iovec(cmd, iov, be32_to_cpu(hdr->offset), |
1380 | payload_length); | |
e48354ce NB |
1381 | if (iov_ret < 0) |
1382 | return -1; | |
1383 | ||
1384 | iov_count += iov_ret; | |
1385 | ||
1386 | padding = ((-payload_length) & 3); | |
1387 | if (padding != 0) { | |
1388 | iov[iov_count].iov_base = cmd->pad_bytes; | |
1389 | iov[iov_count++].iov_len = padding; | |
1390 | rx_size += padding; | |
1391 | pr_debug("Receiving %u padding bytes.\n", padding); | |
1392 | } | |
1393 | ||
1394 | if (conn->conn_ops->DataDigest) { | |
1395 | iov[iov_count].iov_base = &checksum; | |
1396 | iov[iov_count++].iov_len = ISCSI_CRC_LEN; | |
1397 | rx_size += ISCSI_CRC_LEN; | |
1398 | } | |
1399 | ||
1400 | rx_got = rx_data(conn, &cmd->iov_data[0], iov_count, rx_size); | |
1401 | ||
1402 | iscsit_unmap_iovec(cmd); | |
1403 | ||
1404 | if (rx_got != rx_size) | |
1405 | return -1; | |
1406 | ||
1407 | if (conn->conn_ops->DataDigest) { | |
1408 | u32 data_crc; | |
1409 | ||
1410 | data_crc = iscsit_do_crypto_hash_sg(&conn->conn_rx_hash, cmd, | |
50e5c87d CH |
1411 | be32_to_cpu(hdr->offset), |
1412 | payload_length, padding, | |
e48354ce NB |
1413 | cmd->pad_bytes); |
1414 | ||
1415 | if (checksum != data_crc) { | |
1416 | pr_err("ITT: 0x%08x, Offset: %u, Length: %u," | |
1417 | " DataSN: 0x%08x, CRC32C DataDigest 0x%08x" | |
1418 | " does not match computed 0x%08x\n", | |
1419 | hdr->itt, hdr->offset, payload_length, | |
1420 | hdr->datasn, checksum, data_crc); | |
1421 | data_crc_failed = 1; | |
1422 | } else { | |
1423 | pr_debug("Got CRC32C DataDigest 0x%08x for" | |
1424 | " %u bytes of Data Out\n", checksum, | |
1425 | payload_length); | |
1426 | } | |
1427 | } | |
3e1c81a9 NB |
1428 | |
1429 | return data_crc_failed; | |
1430 | } | |
1431 | ||
1432 | int | |
1433 | iscsit_check_dataout_payload(struct iscsi_cmd *cmd, struct iscsi_data *hdr, | |
1434 | bool data_crc_failed) | |
1435 | { | |
1436 | struct iscsi_conn *conn = cmd->conn; | |
1437 | int rc, ooo_cmdsn; | |
e48354ce NB |
1438 | /* |
1439 | * Increment post receive data and CRC values or perform | |
1440 | * within-command recovery. | |
1441 | */ | |
3e1c81a9 NB |
1442 | rc = iscsit_check_post_dataout(cmd, (unsigned char *)hdr, data_crc_failed); |
1443 | if ((rc == DATAOUT_NORMAL) || (rc == DATAOUT_WITHIN_COMMAND_RECOVERY)) | |
e48354ce | 1444 | return 0; |
3e1c81a9 | 1445 | else if (rc == DATAOUT_SEND_R2T) { |
e48354ce | 1446 | iscsit_set_dataout_sequence_values(cmd); |
3e1c81a9 NB |
1447 | conn->conn_transport->iscsit_get_dataout(conn, cmd, false); |
1448 | } else if (rc == DATAOUT_SEND_TO_TRANSPORT) { | |
e48354ce NB |
1449 | /* |
1450 | * Handle extra special case for out of order | |
1451 | * Unsolicited Data Out. | |
1452 | */ | |
1453 | spin_lock_bh(&cmd->istate_lock); | |
1454 | ooo_cmdsn = (cmd->cmd_flags & ICF_OOO_CMDSN); | |
1455 | cmd->cmd_flags |= ICF_GOT_LAST_DATAOUT; | |
1456 | cmd->i_state = ISTATE_RECEIVED_LAST_DATAOUT; | |
1457 | spin_unlock_bh(&cmd->istate_lock); | |
1458 | ||
1459 | iscsit_stop_dataout_timer(cmd); | |
67441b68 CH |
1460 | if (ooo_cmdsn) |
1461 | return 0; | |
1462 | target_execute_cmd(&cmd->se_cmd); | |
1463 | return 0; | |
e48354ce NB |
1464 | } else /* DATAOUT_CANNOT_RECOVER */ |
1465 | return -1; | |
1466 | ||
1467 | return 0; | |
1468 | } | |
3e1c81a9 | 1469 | EXPORT_SYMBOL(iscsit_check_dataout_payload); |
e48354ce | 1470 | |
3e1c81a9 NB |
1471 | static int iscsit_handle_data_out(struct iscsi_conn *conn, unsigned char *buf) |
1472 | { | |
dbcbc95c | 1473 | struct iscsi_cmd *cmd = NULL; |
3e1c81a9 NB |
1474 | struct iscsi_data *hdr = (struct iscsi_data *)buf; |
1475 | int rc; | |
1476 | bool data_crc_failed = false; | |
1477 | ||
1478 | rc = iscsit_check_dataout_hdr(conn, buf, &cmd); | |
1479 | if (rc < 0) | |
561bf158 | 1480 | return 0; |
3e1c81a9 NB |
1481 | else if (!cmd) |
1482 | return 0; | |
1483 | ||
1484 | rc = iscsit_get_dataout(conn, cmd, hdr); | |
1485 | if (rc < 0) | |
1486 | return rc; | |
1487 | else if (rc > 0) | |
1488 | data_crc_failed = true; | |
1489 | ||
1490 | return iscsit_check_dataout_payload(cmd, hdr, data_crc_failed); | |
1491 | } | |
1492 | ||
778de368 NB |
1493 | int iscsit_setup_nop_out(struct iscsi_conn *conn, struct iscsi_cmd *cmd, |
1494 | struct iscsi_nopout *hdr) | |
e48354ce | 1495 | { |
778de368 | 1496 | u32 payload_length = ntoh24(hdr->dlength); |
e48354ce | 1497 | |
66c7db68 | 1498 | if (hdr->itt == RESERVED_ITT && !(hdr->opcode & ISCSI_OP_IMMEDIATE)) { |
e48354ce NB |
1499 | pr_err("NOPOUT ITT is reserved, but Immediate Bit is" |
1500 | " not set, protocol error.\n"); | |
28aaa950 NB |
1501 | if (!cmd) |
1502 | return iscsit_add_reject(conn, ISCSI_REASON_PROTOCOL_ERROR, | |
1503 | (unsigned char *)hdr); | |
1504 | ||
ba159914 NB |
1505 | return iscsit_reject_cmd(cmd, ISCSI_REASON_PROTOCOL_ERROR, |
1506 | (unsigned char *)hdr); | |
e48354ce NB |
1507 | } |
1508 | ||
21f5aa7e | 1509 | if (payload_length > conn->conn_ops->MaxXmitDataSegmentLength) { |
e48354ce | 1510 | pr_err("NOPOUT Ping Data DataSegmentLength: %u is" |
21f5aa7e | 1511 | " greater than MaxXmitDataSegmentLength: %u, protocol" |
e48354ce | 1512 | " error.\n", payload_length, |
21f5aa7e | 1513 | conn->conn_ops->MaxXmitDataSegmentLength); |
28aaa950 NB |
1514 | if (!cmd) |
1515 | return iscsit_add_reject(conn, ISCSI_REASON_PROTOCOL_ERROR, | |
1516 | (unsigned char *)hdr); | |
1517 | ||
ba159914 NB |
1518 | return iscsit_reject_cmd(cmd, ISCSI_REASON_PROTOCOL_ERROR, |
1519 | (unsigned char *)hdr); | |
e48354ce NB |
1520 | } |
1521 | ||
3e1c81a9 | 1522 | pr_debug("Got NOPOUT Ping %s ITT: 0x%08x, TTT: 0x%08x," |
e48354ce | 1523 | " CmdSN: 0x%08x, ExpStatSN: 0x%08x, Length: %u\n", |
66c7db68 | 1524 | hdr->itt == RESERVED_ITT ? "Response" : "Request", |
e48354ce NB |
1525 | hdr->itt, hdr->ttt, hdr->cmdsn, hdr->exp_statsn, |
1526 | payload_length); | |
1527 | /* | |
1528 | * This is not a response to a Unsolicited NopIN, which means | |
1529 | * it can either be a NOPOUT ping request (with a valid ITT), | |
1530 | * or a NOPOUT not requesting a NOPIN (with a reserved ITT). | |
1531 | * Either way, make sure we allocate an struct iscsi_cmd, as both | |
1532 | * can contain ping data. | |
1533 | */ | |
50e5c87d | 1534 | if (hdr->ttt == cpu_to_be32(0xFFFFFFFF)) { |
e48354ce NB |
1535 | cmd->iscsi_opcode = ISCSI_OP_NOOP_OUT; |
1536 | cmd->i_state = ISTATE_SEND_NOPIN; | |
1537 | cmd->immediate_cmd = ((hdr->opcode & ISCSI_OP_IMMEDIATE) ? | |
1538 | 1 : 0); | |
1539 | conn->sess->init_task_tag = cmd->init_task_tag = hdr->itt; | |
1540 | cmd->targ_xfer_tag = 0xFFFFFFFF; | |
50e5c87d CH |
1541 | cmd->cmd_sn = be32_to_cpu(hdr->cmdsn); |
1542 | cmd->exp_stat_sn = be32_to_cpu(hdr->exp_statsn); | |
e48354ce NB |
1543 | cmd->data_direction = DMA_NONE; |
1544 | } | |
1545 | ||
778de368 NB |
1546 | return 0; |
1547 | } | |
1548 | EXPORT_SYMBOL(iscsit_setup_nop_out); | |
1549 | ||
1550 | int iscsit_process_nop_out(struct iscsi_conn *conn, struct iscsi_cmd *cmd, | |
1551 | struct iscsi_nopout *hdr) | |
1552 | { | |
1553 | struct iscsi_cmd *cmd_p = NULL; | |
1554 | int cmdsn_ret = 0; | |
1555 | /* | |
1556 | * Initiator is expecting a NopIN ping reply.. | |
1557 | */ | |
1558 | if (hdr->itt != RESERVED_ITT) { | |
1559 | BUG_ON(!cmd); | |
1560 | ||
1561 | spin_lock_bh(&conn->cmd_lock); | |
1562 | list_add_tail(&cmd->i_conn_node, &conn->conn_cmd_list); | |
1563 | spin_unlock_bh(&conn->cmd_lock); | |
1564 | ||
1565 | iscsit_ack_from_expstatsn(conn, be32_to_cpu(hdr->exp_statsn)); | |
1566 | ||
1567 | if (hdr->opcode & ISCSI_OP_IMMEDIATE) { | |
1568 | iscsit_add_cmd_to_response_queue(cmd, conn, | |
1569 | cmd->i_state); | |
1570 | return 0; | |
1571 | } | |
1572 | ||
561bf158 NB |
1573 | cmdsn_ret = iscsit_sequence_cmd(conn, cmd, |
1574 | (unsigned char *)hdr, hdr->cmdsn); | |
778de368 NB |
1575 | if (cmdsn_ret == CMDSN_LOWER_THAN_EXP) |
1576 | return 0; | |
778de368 | 1577 | if (cmdsn_ret == CMDSN_ERROR_CANNOT_RECOVER) |
ba159914 | 1578 | return -1; |
778de368 NB |
1579 | |
1580 | return 0; | |
1581 | } | |
1582 | /* | |
1583 | * This was a response to a unsolicited NOPIN ping. | |
1584 | */ | |
1585 | if (hdr->ttt != cpu_to_be32(0xFFFFFFFF)) { | |
1586 | cmd_p = iscsit_find_cmd_from_ttt(conn, be32_to_cpu(hdr->ttt)); | |
1587 | if (!cmd_p) | |
1588 | return -EINVAL; | |
1589 | ||
1590 | iscsit_stop_nopin_response_timer(conn); | |
1591 | ||
1592 | cmd_p->i_state = ISTATE_REMOVE; | |
1593 | iscsit_add_cmd_to_immediate_queue(cmd_p, conn, cmd_p->i_state); | |
1594 | ||
1595 | iscsit_start_nopin_timer(conn); | |
1596 | return 0; | |
1597 | } | |
1598 | /* | |
1599 | * Otherwise, initiator is not expecting a NOPIN is response. | |
1600 | * Just ignore for now. | |
1601 | */ | |
1602 | return 0; | |
1603 | } | |
1604 | EXPORT_SYMBOL(iscsit_process_nop_out); | |
1605 | ||
1606 | static int iscsit_handle_nop_out(struct iscsi_conn *conn, struct iscsi_cmd *cmd, | |
1607 | unsigned char *buf) | |
1608 | { | |
1609 | unsigned char *ping_data = NULL; | |
1610 | struct iscsi_nopout *hdr = (struct iscsi_nopout *)buf; | |
1611 | struct kvec *iov = NULL; | |
1612 | u32 payload_length = ntoh24(hdr->dlength); | |
1613 | int ret; | |
1614 | ||
1615 | ret = iscsit_setup_nop_out(conn, cmd, hdr); | |
1616 | if (ret < 0) | |
561bf158 | 1617 | return 0; |
778de368 NB |
1618 | /* |
1619 | * Handle NOP-OUT payload for traditional iSCSI sockets | |
1620 | */ | |
50e5c87d | 1621 | if (payload_length && hdr->ttt == cpu_to_be32(0xFFFFFFFF)) { |
778de368 NB |
1622 | u32 checksum, data_crc, padding = 0; |
1623 | int niov = 0, rx_got, rx_size = payload_length; | |
1624 | ||
e48354ce NB |
1625 | ping_data = kzalloc(payload_length + 1, GFP_KERNEL); |
1626 | if (!ping_data) { | |
1627 | pr_err("Unable to allocate memory for" | |
1628 | " NOPOUT ping data.\n"); | |
1629 | ret = -1; | |
1630 | goto out; | |
1631 | } | |
1632 | ||
1633 | iov = &cmd->iov_misc[0]; | |
1634 | iov[niov].iov_base = ping_data; | |
1635 | iov[niov++].iov_len = payload_length; | |
1636 | ||
1637 | padding = ((-payload_length) & 3); | |
1638 | if (padding != 0) { | |
1639 | pr_debug("Receiving %u additional bytes" | |
1640 | " for padding.\n", padding); | |
1641 | iov[niov].iov_base = &cmd->pad_bytes; | |
1642 | iov[niov++].iov_len = padding; | |
1643 | rx_size += padding; | |
1644 | } | |
1645 | if (conn->conn_ops->DataDigest) { | |
1646 | iov[niov].iov_base = &checksum; | |
1647 | iov[niov++].iov_len = ISCSI_CRC_LEN; | |
1648 | rx_size += ISCSI_CRC_LEN; | |
1649 | } | |
1650 | ||
1651 | rx_got = rx_data(conn, &cmd->iov_misc[0], niov, rx_size); | |
1652 | if (rx_got != rx_size) { | |
1653 | ret = -1; | |
1654 | goto out; | |
1655 | } | |
1656 | ||
1657 | if (conn->conn_ops->DataDigest) { | |
1658 | iscsit_do_crypto_hash_buf(&conn->conn_rx_hash, | |
1659 | ping_data, payload_length, | |
1660 | padding, cmd->pad_bytes, | |
1661 | (u8 *)&data_crc); | |
1662 | ||
1663 | if (checksum != data_crc) { | |
1664 | pr_err("Ping data CRC32C DataDigest" | |
1665 | " 0x%08x does not match computed 0x%08x\n", | |
1666 | checksum, data_crc); | |
1667 | if (!conn->sess->sess_ops->ErrorRecoveryLevel) { | |
1668 | pr_err("Unable to recover from" | |
1669 | " NOPOUT Ping DataCRC failure while in" | |
1670 | " ERL=0.\n"); | |
1671 | ret = -1; | |
1672 | goto out; | |
1673 | } else { | |
1674 | /* | |
1675 | * Silently drop this PDU and let the | |
1676 | * initiator plug the CmdSN gap. | |
1677 | */ | |
1678 | pr_debug("Dropping NOPOUT" | |
1679 | " Command CmdSN: 0x%08x due to" | |
1680 | " DataCRC error.\n", hdr->cmdsn); | |
1681 | ret = 0; | |
1682 | goto out; | |
1683 | } | |
1684 | } else { | |
1685 | pr_debug("Got CRC32C DataDigest" | |
1686 | " 0x%08x for %u bytes of ping data.\n", | |
1687 | checksum, payload_length); | |
1688 | } | |
1689 | } | |
1690 | ||
1691 | ping_data[payload_length] = '\0'; | |
1692 | /* | |
1693 | * Attach ping data to struct iscsi_cmd->buf_ptr. | |
1694 | */ | |
8359cf43 | 1695 | cmd->buf_ptr = ping_data; |
e48354ce NB |
1696 | cmd->buf_ptr_size = payload_length; |
1697 | ||
1698 | pr_debug("Got %u bytes of NOPOUT ping" | |
1699 | " data.\n", payload_length); | |
1700 | pr_debug("Ping Data: \"%s\"\n", ping_data); | |
1701 | } | |
1702 | ||
778de368 | 1703 | return iscsit_process_nop_out(conn, cmd, hdr); |
e48354ce NB |
1704 | out: |
1705 | if (cmd) | |
aafc9d15 | 1706 | iscsit_free_cmd(cmd, false); |
778de368 | 1707 | |
e48354ce NB |
1708 | kfree(ping_data); |
1709 | return ret; | |
1710 | } | |
1711 | ||
3e1c81a9 NB |
1712 | int |
1713 | iscsit_handle_task_mgt_cmd(struct iscsi_conn *conn, struct iscsi_cmd *cmd, | |
1714 | unsigned char *buf) | |
e48354ce | 1715 | { |
e48354ce NB |
1716 | struct se_tmr_req *se_tmr; |
1717 | struct iscsi_tmr_req *tmr_req; | |
1718 | struct iscsi_tm *hdr; | |
186a9647 NB |
1719 | int out_of_order_cmdsn = 0, ret; |
1720 | bool sess_ref = false; | |
e48354ce NB |
1721 | u8 function; |
1722 | ||
1723 | hdr = (struct iscsi_tm *) buf; | |
e48354ce NB |
1724 | hdr->flags &= ~ISCSI_FLAG_CMD_FINAL; |
1725 | function = hdr->flags; | |
1726 | ||
1727 | pr_debug("Got Task Management Request ITT: 0x%08x, CmdSN:" | |
1728 | " 0x%08x, Function: 0x%02x, RefTaskTag: 0x%08x, RefCmdSN:" | |
1729 | " 0x%08x, CID: %hu\n", hdr->itt, hdr->cmdsn, function, | |
1730 | hdr->rtt, hdr->refcmdsn, conn->cid); | |
1731 | ||
1732 | if ((function != ISCSI_TM_FUNC_ABORT_TASK) && | |
1733 | ((function != ISCSI_TM_FUNC_TASK_REASSIGN) && | |
66c7db68 | 1734 | hdr->rtt != RESERVED_ITT)) { |
e48354ce | 1735 | pr_err("RefTaskTag should be set to 0xFFFFFFFF.\n"); |
66c7db68 | 1736 | hdr->rtt = RESERVED_ITT; |
e48354ce NB |
1737 | } |
1738 | ||
1739 | if ((function == ISCSI_TM_FUNC_TASK_REASSIGN) && | |
1740 | !(hdr->opcode & ISCSI_OP_IMMEDIATE)) { | |
1741 | pr_err("Task Management Request TASK_REASSIGN not" | |
1742 | " issued as immediate command, bad iSCSI Initiator" | |
1743 | "implementation\n"); | |
ba159914 NB |
1744 | return iscsit_add_reject_cmd(cmd, |
1745 | ISCSI_REASON_PROTOCOL_ERROR, buf); | |
e48354ce NB |
1746 | } |
1747 | if ((function != ISCSI_TM_FUNC_ABORT_TASK) && | |
50e5c87d CH |
1748 | be32_to_cpu(hdr->refcmdsn) != ISCSI_RESERVED_TAG) |
1749 | hdr->refcmdsn = cpu_to_be32(ISCSI_RESERVED_TAG); | |
e48354ce | 1750 | |
d28b1169 AG |
1751 | cmd->data_direction = DMA_NONE; |
1752 | ||
1753 | cmd->tmr_req = kzalloc(sizeof(struct iscsi_tmr_req), GFP_KERNEL); | |
1754 | if (!cmd->tmr_req) { | |
1755 | pr_err("Unable to allocate memory for" | |
1756 | " Task Management command!\n"); | |
ba159914 NB |
1757 | return iscsit_add_reject_cmd(cmd, |
1758 | ISCSI_REASON_BOOKMARK_NO_RESOURCES, | |
1759 | buf); | |
d28b1169 AG |
1760 | } |
1761 | ||
1762 | /* | |
1763 | * TASK_REASSIGN for ERL=2 / connection stays inside of | |
1764 | * LIO-Target $FABRIC_MOD | |
1765 | */ | |
1766 | if (function != ISCSI_TM_FUNC_TASK_REASSIGN) { | |
1767 | ||
1768 | u8 tcm_function; | |
1769 | int ret; | |
1770 | ||
1771 | transport_init_se_cmd(&cmd->se_cmd, | |
1772 | &lio_target_fabric_configfs->tf_ops, | |
1773 | conn->sess->se_sess, 0, DMA_NONE, | |
9c58b7dd | 1774 | MSG_SIMPLE_TAG, cmd->sense_buffer + 2); |
d28b1169 | 1775 | |
186a9647 NB |
1776 | target_get_sess_cmd(conn->sess->se_sess, &cmd->se_cmd, true); |
1777 | sess_ref = true; | |
1778 | ||
d28b1169 AG |
1779 | switch (function) { |
1780 | case ISCSI_TM_FUNC_ABORT_TASK: | |
1781 | tcm_function = TMR_ABORT_TASK; | |
1782 | break; | |
1783 | case ISCSI_TM_FUNC_ABORT_TASK_SET: | |
1784 | tcm_function = TMR_ABORT_TASK_SET; | |
1785 | break; | |
1786 | case ISCSI_TM_FUNC_CLEAR_ACA: | |
1787 | tcm_function = TMR_CLEAR_ACA; | |
1788 | break; | |
1789 | case ISCSI_TM_FUNC_CLEAR_TASK_SET: | |
1790 | tcm_function = TMR_CLEAR_TASK_SET; | |
1791 | break; | |
1792 | case ISCSI_TM_FUNC_LOGICAL_UNIT_RESET: | |
1793 | tcm_function = TMR_LUN_RESET; | |
1794 | break; | |
1795 | case ISCSI_TM_FUNC_TARGET_WARM_RESET: | |
1796 | tcm_function = TMR_TARGET_WARM_RESET; | |
1797 | break; | |
1798 | case ISCSI_TM_FUNC_TARGET_COLD_RESET: | |
1799 | tcm_function = TMR_TARGET_COLD_RESET; | |
1800 | break; | |
1801 | default: | |
1802 | pr_err("Unknown iSCSI TMR Function:" | |
1803 | " 0x%02x\n", function); | |
ba159914 NB |
1804 | return iscsit_add_reject_cmd(cmd, |
1805 | ISCSI_REASON_BOOKMARK_NO_RESOURCES, buf); | |
d28b1169 AG |
1806 | } |
1807 | ||
1808 | ret = core_tmr_alloc_req(&cmd->se_cmd, cmd->tmr_req, | |
1809 | tcm_function, GFP_KERNEL); | |
1810 | if (ret < 0) | |
ba159914 NB |
1811 | return iscsit_add_reject_cmd(cmd, |
1812 | ISCSI_REASON_BOOKMARK_NO_RESOURCES, buf); | |
d28b1169 AG |
1813 | |
1814 | cmd->tmr_req->se_tmr_req = cmd->se_cmd.se_tmr_req; | |
1815 | } | |
e48354ce NB |
1816 | |
1817 | cmd->iscsi_opcode = ISCSI_OP_SCSI_TMFUNC; | |
1818 | cmd->i_state = ISTATE_SEND_TASKMGTRSP; | |
1819 | cmd->immediate_cmd = ((hdr->opcode & ISCSI_OP_IMMEDIATE) ? 1 : 0); | |
1820 | cmd->init_task_tag = hdr->itt; | |
1821 | cmd->targ_xfer_tag = 0xFFFFFFFF; | |
50e5c87d CH |
1822 | cmd->cmd_sn = be32_to_cpu(hdr->cmdsn); |
1823 | cmd->exp_stat_sn = be32_to_cpu(hdr->exp_statsn); | |
e48354ce NB |
1824 | se_tmr = cmd->se_cmd.se_tmr_req; |
1825 | tmr_req = cmd->tmr_req; | |
1826 | /* | |
1827 | * Locate the struct se_lun for all TMRs not related to ERL=2 TASK_REASSIGN | |
1828 | */ | |
1829 | if (function != ISCSI_TM_FUNC_TASK_REASSIGN) { | |
4f26998a AG |
1830 | ret = transport_lookup_tmr_lun(&cmd->se_cmd, |
1831 | scsilun_to_int(&hdr->lun)); | |
e48354ce | 1832 | if (ret < 0) { |
e48354ce NB |
1833 | se_tmr->response = ISCSI_TMF_RSP_NO_LUN; |
1834 | goto attach; | |
1835 | } | |
1836 | } | |
1837 | ||
1838 | switch (function) { | |
1839 | case ISCSI_TM_FUNC_ABORT_TASK: | |
1840 | se_tmr->response = iscsit_tmr_abort_task(cmd, buf); | |
de103c93 | 1841 | if (se_tmr->response) |
e48354ce | 1842 | goto attach; |
e48354ce NB |
1843 | break; |
1844 | case ISCSI_TM_FUNC_ABORT_TASK_SET: | |
1845 | case ISCSI_TM_FUNC_CLEAR_ACA: | |
1846 | case ISCSI_TM_FUNC_CLEAR_TASK_SET: | |
1847 | case ISCSI_TM_FUNC_LOGICAL_UNIT_RESET: | |
1848 | break; | |
1849 | case ISCSI_TM_FUNC_TARGET_WARM_RESET: | |
1850 | if (iscsit_tmr_task_warm_reset(conn, tmr_req, buf) < 0) { | |
e48354ce NB |
1851 | se_tmr->response = ISCSI_TMF_RSP_AUTH_FAILED; |
1852 | goto attach; | |
1853 | } | |
1854 | break; | |
1855 | case ISCSI_TM_FUNC_TARGET_COLD_RESET: | |
1856 | if (iscsit_tmr_task_cold_reset(conn, tmr_req, buf) < 0) { | |
e48354ce NB |
1857 | se_tmr->response = ISCSI_TMF_RSP_AUTH_FAILED; |
1858 | goto attach; | |
1859 | } | |
1860 | break; | |
1861 | case ISCSI_TM_FUNC_TASK_REASSIGN: | |
1862 | se_tmr->response = iscsit_tmr_task_reassign(cmd, buf); | |
1863 | /* | |
1864 | * Perform sanity checks on the ExpDataSN only if the | |
1865 | * TASK_REASSIGN was successful. | |
1866 | */ | |
de103c93 | 1867 | if (se_tmr->response) |
e48354ce NB |
1868 | break; |
1869 | ||
1870 | if (iscsit_check_task_reassign_expdatasn(tmr_req, conn) < 0) | |
ba159914 NB |
1871 | return iscsit_add_reject_cmd(cmd, |
1872 | ISCSI_REASON_BOOKMARK_INVALID, buf); | |
e48354ce NB |
1873 | break; |
1874 | default: | |
1875 | pr_err("Unknown TMR function: 0x%02x, protocol" | |
1876 | " error.\n", function); | |
e48354ce NB |
1877 | se_tmr->response = ISCSI_TMF_RSP_NOT_SUPPORTED; |
1878 | goto attach; | |
1879 | } | |
1880 | ||
1881 | if ((function != ISCSI_TM_FUNC_TASK_REASSIGN) && | |
1882 | (se_tmr->response == ISCSI_TMF_RSP_COMPLETE)) | |
1883 | se_tmr->call_transport = 1; | |
1884 | attach: | |
1885 | spin_lock_bh(&conn->cmd_lock); | |
2fbb471e | 1886 | list_add_tail(&cmd->i_conn_node, &conn->conn_cmd_list); |
e48354ce NB |
1887 | spin_unlock_bh(&conn->cmd_lock); |
1888 | ||
1889 | if (!(hdr->opcode & ISCSI_OP_IMMEDIATE)) { | |
561bf158 | 1890 | int cmdsn_ret = iscsit_sequence_cmd(conn, cmd, buf, hdr->cmdsn); |
e48354ce NB |
1891 | if (cmdsn_ret == CMDSN_HIGHER_THAN_EXP) |
1892 | out_of_order_cmdsn = 1; | |
5a4c8666 | 1893 | else if (cmdsn_ret == CMDSN_LOWER_THAN_EXP) |
e48354ce | 1894 | return 0; |
5a4c8666 | 1895 | else if (cmdsn_ret == CMDSN_ERROR_CANNOT_RECOVER) |
ba159914 | 1896 | return -1; |
e48354ce | 1897 | } |
50e5c87d | 1898 | iscsit_ack_from_expstatsn(conn, be32_to_cpu(hdr->exp_statsn)); |
e48354ce | 1899 | |
5a4c8666 | 1900 | if (out_of_order_cmdsn || !(hdr->opcode & ISCSI_OP_IMMEDIATE)) |
e48354ce NB |
1901 | return 0; |
1902 | /* | |
1903 | * Found the referenced task, send to transport for processing. | |
1904 | */ | |
1905 | if (se_tmr->call_transport) | |
1906 | return transport_generic_handle_tmr(&cmd->se_cmd); | |
1907 | ||
1908 | /* | |
1909 | * Could not find the referenced LUN, task, or Task Management | |
1910 | * command not authorized or supported. Change state and | |
1911 | * let the tx_thread send the response. | |
1912 | * | |
1913 | * For connection recovery, this is also the default action for | |
1914 | * TMR TASK_REASSIGN. | |
1915 | */ | |
186a9647 NB |
1916 | if (sess_ref) { |
1917 | pr_debug("Handle TMR, using sess_ref=true check\n"); | |
1918 | target_put_sess_cmd(conn->sess->se_sess, &cmd->se_cmd); | |
1919 | } | |
1920 | ||
e48354ce NB |
1921 | iscsit_add_cmd_to_response_queue(cmd, conn, cmd->i_state); |
1922 | return 0; | |
1923 | } | |
3e1c81a9 | 1924 | EXPORT_SYMBOL(iscsit_handle_task_mgt_cmd); |
e48354ce NB |
1925 | |
1926 | /* #warning FIXME: Support Text Command parameters besides SendTargets */ | |
64534aa7 NB |
1927 | int |
1928 | iscsit_setup_text_cmd(struct iscsi_conn *conn, struct iscsi_cmd *cmd, | |
1929 | struct iscsi_text *hdr) | |
e48354ce | 1930 | { |
64534aa7 | 1931 | u32 payload_length = ntoh24(hdr->dlength); |
e48354ce | 1932 | |
21f5aa7e | 1933 | if (payload_length > conn->conn_ops->MaxXmitDataSegmentLength) { |
e48354ce | 1934 | pr_err("Unable to accept text parameter length: %u" |
21f5aa7e NB |
1935 | "greater than MaxXmitDataSegmentLength %u.\n", |
1936 | payload_length, conn->conn_ops->MaxXmitDataSegmentLength); | |
ba159914 NB |
1937 | return iscsit_reject_cmd(cmd, ISCSI_REASON_PROTOCOL_ERROR, |
1938 | (unsigned char *)hdr); | |
e48354ce NB |
1939 | } |
1940 | ||
122f8afc NB |
1941 | if (!(hdr->flags & ISCSI_FLAG_CMD_FINAL) || |
1942 | (hdr->flags & ISCSI_FLAG_TEXT_CONTINUE)) { | |
1943 | pr_err("Multi sequence text commands currently not supported\n"); | |
1944 | return iscsit_reject_cmd(cmd, ISCSI_REASON_CMD_NOT_SUPPORTED, | |
1945 | (unsigned char *)hdr); | |
1946 | } | |
1947 | ||
e48354ce NB |
1948 | pr_debug("Got Text Request: ITT: 0x%08x, CmdSN: 0x%08x," |
1949 | " ExpStatSN: 0x%08x, Length: %u\n", hdr->itt, hdr->cmdsn, | |
1950 | hdr->exp_statsn, payload_length); | |
1951 | ||
64534aa7 NB |
1952 | cmd->iscsi_opcode = ISCSI_OP_TEXT; |
1953 | cmd->i_state = ISTATE_SEND_TEXTRSP; | |
1954 | cmd->immediate_cmd = ((hdr->opcode & ISCSI_OP_IMMEDIATE) ? 1 : 0); | |
1955 | conn->sess->init_task_tag = cmd->init_task_tag = hdr->itt; | |
1956 | cmd->targ_xfer_tag = 0xFFFFFFFF; | |
1957 | cmd->cmd_sn = be32_to_cpu(hdr->cmdsn); | |
1958 | cmd->exp_stat_sn = be32_to_cpu(hdr->exp_statsn); | |
1959 | cmd->data_direction = DMA_NONE; | |
1960 | ||
1961 | return 0; | |
1962 | } | |
1963 | EXPORT_SYMBOL(iscsit_setup_text_cmd); | |
1964 | ||
1965 | int | |
1966 | iscsit_process_text_cmd(struct iscsi_conn *conn, struct iscsi_cmd *cmd, | |
1967 | struct iscsi_text *hdr) | |
1968 | { | |
9864ca9d | 1969 | unsigned char *text_in = cmd->text_in_ptr, *text_ptr; |
64534aa7 NB |
1970 | int cmdsn_ret; |
1971 | ||
9864ca9d NB |
1972 | if (!text_in) { |
1973 | pr_err("Unable to locate text_in buffer for sendtargets" | |
1974 | " discovery\n"); | |
1975 | goto reject; | |
1976 | } | |
1977 | if (strncmp("SendTargets", text_in, 11) != 0) { | |
1978 | pr_err("Received Text Data that is not" | |
1979 | " SendTargets, cannot continue.\n"); | |
1980 | goto reject; | |
1981 | } | |
1982 | text_ptr = strchr(text_in, '='); | |
1983 | if (!text_ptr) { | |
1984 | pr_err("No \"=\" separator found in Text Data," | |
1985 | " cannot continue.\n"); | |
1986 | goto reject; | |
1987 | } | |
1988 | if (!strncmp("=All", text_ptr, 4)) { | |
1989 | cmd->cmd_flags |= IFC_SENDTARGETS_ALL; | |
6665889c NB |
1990 | } else if (!strncmp("=iqn.", text_ptr, 5) || |
1991 | !strncmp("=eui.", text_ptr, 5)) { | |
1992 | cmd->cmd_flags |= IFC_SENDTARGETS_SINGLE; | |
9864ca9d NB |
1993 | } else { |
1994 | pr_err("Unable to locate valid SendTargets=%s value\n", text_ptr); | |
1995 | goto reject; | |
1996 | } | |
1997 | ||
64534aa7 NB |
1998 | spin_lock_bh(&conn->cmd_lock); |
1999 | list_add_tail(&cmd->i_conn_node, &conn->conn_cmd_list); | |
2000 | spin_unlock_bh(&conn->cmd_lock); | |
2001 | ||
2002 | iscsit_ack_from_expstatsn(conn, be32_to_cpu(hdr->exp_statsn)); | |
2003 | ||
2004 | if (!(hdr->opcode & ISCSI_OP_IMMEDIATE)) { | |
561bf158 NB |
2005 | cmdsn_ret = iscsit_sequence_cmd(conn, cmd, |
2006 | (unsigned char *)hdr, hdr->cmdsn); | |
64534aa7 | 2007 | if (cmdsn_ret == CMDSN_ERROR_CANNOT_RECOVER) |
ba159914 NB |
2008 | return -1; |
2009 | ||
64534aa7 NB |
2010 | return 0; |
2011 | } | |
2012 | ||
2013 | return iscsit_execute_cmd(cmd, 0); | |
9864ca9d NB |
2014 | |
2015 | reject: | |
ba159914 NB |
2016 | return iscsit_reject_cmd(cmd, ISCSI_REASON_PROTOCOL_ERROR, |
2017 | (unsigned char *)hdr); | |
64534aa7 NB |
2018 | } |
2019 | EXPORT_SYMBOL(iscsit_process_text_cmd); | |
2020 | ||
2021 | static int | |
2022 | iscsit_handle_text_cmd(struct iscsi_conn *conn, struct iscsi_cmd *cmd, | |
2023 | unsigned char *buf) | |
2024 | { | |
2025 | struct iscsi_text *hdr = (struct iscsi_text *)buf; | |
2026 | char *text_in = NULL; | |
2027 | u32 payload_length = ntoh24(hdr->dlength); | |
2028 | int rx_size, rc; | |
2029 | ||
2030 | rc = iscsit_setup_text_cmd(conn, cmd, hdr); | |
2031 | if (rc < 0) | |
561bf158 | 2032 | return 0; |
64534aa7 NB |
2033 | |
2034 | rx_size = payload_length; | |
2035 | if (payload_length) { | |
64534aa7 NB |
2036 | u32 checksum = 0, data_crc = 0; |
2037 | u32 padding = 0, pad_bytes = 0; | |
2038 | int niov = 0, rx_got; | |
2039 | struct kvec iov[3]; | |
2040 | ||
2041 | text_in = kzalloc(payload_length, GFP_KERNEL); | |
e48354ce NB |
2042 | if (!text_in) { |
2043 | pr_err("Unable to allocate memory for" | |
2044 | " incoming text parameters\n"); | |
64534aa7 | 2045 | goto reject; |
e48354ce | 2046 | } |
9864ca9d | 2047 | cmd->text_in_ptr = text_in; |
e48354ce NB |
2048 | |
2049 | memset(iov, 0, 3 * sizeof(struct kvec)); | |
2050 | iov[niov].iov_base = text_in; | |
64534aa7 | 2051 | iov[niov++].iov_len = payload_length; |
e48354ce NB |
2052 | |
2053 | padding = ((-payload_length) & 3); | |
2054 | if (padding != 0) { | |
76f1928e | 2055 | iov[niov].iov_base = &pad_bytes; |
e48354ce NB |
2056 | iov[niov++].iov_len = padding; |
2057 | rx_size += padding; | |
2058 | pr_debug("Receiving %u additional bytes" | |
2059 | " for padding.\n", padding); | |
2060 | } | |
2061 | if (conn->conn_ops->DataDigest) { | |
2062 | iov[niov].iov_base = &checksum; | |
2063 | iov[niov++].iov_len = ISCSI_CRC_LEN; | |
2064 | rx_size += ISCSI_CRC_LEN; | |
2065 | } | |
2066 | ||
2067 | rx_got = rx_data(conn, &iov[0], niov, rx_size); | |
64534aa7 NB |
2068 | if (rx_got != rx_size) |
2069 | goto reject; | |
e48354ce NB |
2070 | |
2071 | if (conn->conn_ops->DataDigest) { | |
2072 | iscsit_do_crypto_hash_buf(&conn->conn_rx_hash, | |
64534aa7 | 2073 | text_in, payload_length, |
76f1928e | 2074 | padding, (u8 *)&pad_bytes, |
e48354ce NB |
2075 | (u8 *)&data_crc); |
2076 | ||
2077 | if (checksum != data_crc) { | |
2078 | pr_err("Text data CRC32C DataDigest" | |
2079 | " 0x%08x does not match computed" | |
2080 | " 0x%08x\n", checksum, data_crc); | |
2081 | if (!conn->sess->sess_ops->ErrorRecoveryLevel) { | |
2082 | pr_err("Unable to recover from" | |
2083 | " Text Data digest failure while in" | |
2084 | " ERL=0.\n"); | |
64534aa7 | 2085 | goto reject; |
e48354ce NB |
2086 | } else { |
2087 | /* | |
2088 | * Silently drop this PDU and let the | |
2089 | * initiator plug the CmdSN gap. | |
2090 | */ | |
2091 | pr_debug("Dropping Text" | |
2092 | " Command CmdSN: 0x%08x due to" | |
2093 | " DataCRC error.\n", hdr->cmdsn); | |
2094 | kfree(text_in); | |
2095 | return 0; | |
2096 | } | |
2097 | } else { | |
2098 | pr_debug("Got CRC32C DataDigest" | |
2099 | " 0x%08x for %u bytes of text data.\n", | |
64534aa7 | 2100 | checksum, payload_length); |
e48354ce NB |
2101 | } |
2102 | } | |
64534aa7 | 2103 | text_in[payload_length - 1] = '\0'; |
e48354ce | 2104 | pr_debug("Successfully read %d bytes of text" |
64534aa7 | 2105 | " data.\n", payload_length); |
e48354ce NB |
2106 | } |
2107 | ||
64534aa7 | 2108 | return iscsit_process_text_cmd(conn, cmd, hdr); |
e48354ce | 2109 | |
64534aa7 | 2110 | reject: |
9864ca9d NB |
2111 | kfree(cmd->text_in_ptr); |
2112 | cmd->text_in_ptr = NULL; | |
ba159914 | 2113 | return iscsit_reject_cmd(cmd, ISCSI_REASON_PROTOCOL_ERROR, buf); |
e48354ce | 2114 | } |
64534aa7 | 2115 | EXPORT_SYMBOL(iscsit_handle_text_cmd); |
e48354ce NB |
2116 | |
2117 | int iscsit_logout_closesession(struct iscsi_cmd *cmd, struct iscsi_conn *conn) | |
2118 | { | |
2119 | struct iscsi_conn *conn_p; | |
2120 | struct iscsi_session *sess = conn->sess; | |
2121 | ||
2122 | pr_debug("Received logout request CLOSESESSION on CID: %hu" | |
2123 | " for SID: %u.\n", conn->cid, conn->sess->sid); | |
2124 | ||
2125 | atomic_set(&sess->session_logout, 1); | |
2126 | atomic_set(&conn->conn_logout_remove, 1); | |
2127 | conn->conn_logout_reason = ISCSI_LOGOUT_REASON_CLOSE_SESSION; | |
2128 | ||
2129 | iscsit_inc_conn_usage_count(conn); | |
2130 | iscsit_inc_session_usage_count(sess); | |
2131 | ||
2132 | spin_lock_bh(&sess->conn_lock); | |
2133 | list_for_each_entry(conn_p, &sess->sess_conn_list, conn_list) { | |
2134 | if (conn_p->conn_state != TARG_CONN_STATE_LOGGED_IN) | |
2135 | continue; | |
2136 | ||
2137 | pr_debug("Moving to TARG_CONN_STATE_IN_LOGOUT.\n"); | |
2138 | conn_p->conn_state = TARG_CONN_STATE_IN_LOGOUT; | |
2139 | } | |
2140 | spin_unlock_bh(&sess->conn_lock); | |
2141 | ||
2142 | iscsit_add_cmd_to_response_queue(cmd, conn, cmd->i_state); | |
2143 | ||
2144 | return 0; | |
2145 | } | |
2146 | ||
2147 | int iscsit_logout_closeconnection(struct iscsi_cmd *cmd, struct iscsi_conn *conn) | |
2148 | { | |
2149 | struct iscsi_conn *l_conn; | |
2150 | struct iscsi_session *sess = conn->sess; | |
2151 | ||
2152 | pr_debug("Received logout request CLOSECONNECTION for CID:" | |
2153 | " %hu on CID: %hu.\n", cmd->logout_cid, conn->cid); | |
2154 | ||
2155 | /* | |
2156 | * A Logout Request with a CLOSECONNECTION reason code for a CID | |
2157 | * can arrive on a connection with a differing CID. | |
2158 | */ | |
2159 | if (conn->cid == cmd->logout_cid) { | |
2160 | spin_lock_bh(&conn->state_lock); | |
2161 | pr_debug("Moving to TARG_CONN_STATE_IN_LOGOUT.\n"); | |
2162 | conn->conn_state = TARG_CONN_STATE_IN_LOGOUT; | |
2163 | ||
2164 | atomic_set(&conn->conn_logout_remove, 1); | |
2165 | conn->conn_logout_reason = ISCSI_LOGOUT_REASON_CLOSE_CONNECTION; | |
2166 | iscsit_inc_conn_usage_count(conn); | |
2167 | ||
2168 | spin_unlock_bh(&conn->state_lock); | |
2169 | } else { | |
2170 | /* | |
2171 | * Handle all different cid CLOSECONNECTION requests in | |
2172 | * iscsit_logout_post_handler_diffcid() as to give enough | |
2173 | * time for any non immediate command's CmdSN to be | |
2174 | * acknowledged on the connection in question. | |
2175 | * | |
2176 | * Here we simply make sure the CID is still around. | |
2177 | */ | |
2178 | l_conn = iscsit_get_conn_from_cid(sess, | |
2179 | cmd->logout_cid); | |
2180 | if (!l_conn) { | |
2181 | cmd->logout_response = ISCSI_LOGOUT_CID_NOT_FOUND; | |
2182 | iscsit_add_cmd_to_response_queue(cmd, conn, | |
2183 | cmd->i_state); | |
2184 | return 0; | |
2185 | } | |
2186 | ||
2187 | iscsit_dec_conn_usage_count(l_conn); | |
2188 | } | |
2189 | ||
2190 | iscsit_add_cmd_to_response_queue(cmd, conn, cmd->i_state); | |
2191 | ||
2192 | return 0; | |
2193 | } | |
2194 | ||
2195 | int iscsit_logout_removeconnforrecovery(struct iscsi_cmd *cmd, struct iscsi_conn *conn) | |
2196 | { | |
2197 | struct iscsi_session *sess = conn->sess; | |
2198 | ||
2199 | pr_debug("Received explicit REMOVECONNFORRECOVERY logout for" | |
2200 | " CID: %hu on CID: %hu.\n", cmd->logout_cid, conn->cid); | |
2201 | ||
2202 | if (sess->sess_ops->ErrorRecoveryLevel != 2) { | |
2203 | pr_err("Received Logout Request REMOVECONNFORRECOVERY" | |
2204 | " while ERL!=2.\n"); | |
2205 | cmd->logout_response = ISCSI_LOGOUT_RECOVERY_UNSUPPORTED; | |
2206 | iscsit_add_cmd_to_response_queue(cmd, conn, cmd->i_state); | |
2207 | return 0; | |
2208 | } | |
2209 | ||
2210 | if (conn->cid == cmd->logout_cid) { | |
2211 | pr_err("Received Logout Request REMOVECONNFORRECOVERY" | |
2212 | " with CID: %hu on CID: %hu, implementation error.\n", | |
2213 | cmd->logout_cid, conn->cid); | |
2214 | cmd->logout_response = ISCSI_LOGOUT_CLEANUP_FAILED; | |
2215 | iscsit_add_cmd_to_response_queue(cmd, conn, cmd->i_state); | |
2216 | return 0; | |
2217 | } | |
2218 | ||
2219 | iscsit_add_cmd_to_response_queue(cmd, conn, cmd->i_state); | |
2220 | ||
2221 | return 0; | |
2222 | } | |
2223 | ||
3e1c81a9 NB |
2224 | int |
2225 | iscsit_handle_logout_cmd(struct iscsi_conn *conn, struct iscsi_cmd *cmd, | |
2226 | unsigned char *buf) | |
e48354ce NB |
2227 | { |
2228 | int cmdsn_ret, logout_remove = 0; | |
2229 | u8 reason_code = 0; | |
e48354ce NB |
2230 | struct iscsi_logout *hdr; |
2231 | struct iscsi_tiqn *tiqn = iscsit_snmp_get_tiqn(conn); | |
2232 | ||
2233 | hdr = (struct iscsi_logout *) buf; | |
2234 | reason_code = (hdr->flags & 0x7f); | |
e48354ce NB |
2235 | |
2236 | if (tiqn) { | |
2237 | spin_lock(&tiqn->logout_stats.lock); | |
2238 | if (reason_code == ISCSI_LOGOUT_REASON_CLOSE_SESSION) | |
2239 | tiqn->logout_stats.normal_logouts++; | |
2240 | else | |
2241 | tiqn->logout_stats.abnormal_logouts++; | |
2242 | spin_unlock(&tiqn->logout_stats.lock); | |
2243 | } | |
2244 | ||
2245 | pr_debug("Got Logout Request ITT: 0x%08x CmdSN: 0x%08x" | |
2246 | " ExpStatSN: 0x%08x Reason: 0x%02x CID: %hu on CID: %hu\n", | |
2247 | hdr->itt, hdr->cmdsn, hdr->exp_statsn, reason_code, | |
2248 | hdr->cid, conn->cid); | |
2249 | ||
2250 | if (conn->conn_state != TARG_CONN_STATE_LOGGED_IN) { | |
2251 | pr_err("Received logout request on connection that" | |
2252 | " is not in logged in state, ignoring request.\n"); | |
aafc9d15 | 2253 | iscsit_free_cmd(cmd, false); |
e48354ce NB |
2254 | return 0; |
2255 | } | |
2256 | ||
e48354ce NB |
2257 | cmd->iscsi_opcode = ISCSI_OP_LOGOUT; |
2258 | cmd->i_state = ISTATE_SEND_LOGOUTRSP; | |
2259 | cmd->immediate_cmd = ((hdr->opcode & ISCSI_OP_IMMEDIATE) ? 1 : 0); | |
2260 | conn->sess->init_task_tag = cmd->init_task_tag = hdr->itt; | |
2261 | cmd->targ_xfer_tag = 0xFFFFFFFF; | |
50e5c87d CH |
2262 | cmd->cmd_sn = be32_to_cpu(hdr->cmdsn); |
2263 | cmd->exp_stat_sn = be32_to_cpu(hdr->exp_statsn); | |
2264 | cmd->logout_cid = be16_to_cpu(hdr->cid); | |
e48354ce NB |
2265 | cmd->logout_reason = reason_code; |
2266 | cmd->data_direction = DMA_NONE; | |
2267 | ||
2268 | /* | |
2269 | * We need to sleep in these cases (by returning 1) until the Logout | |
2270 | * Response gets sent in the tx thread. | |
2271 | */ | |
2272 | if ((reason_code == ISCSI_LOGOUT_REASON_CLOSE_SESSION) || | |
2273 | ((reason_code == ISCSI_LOGOUT_REASON_CLOSE_CONNECTION) && | |
50e5c87d | 2274 | be16_to_cpu(hdr->cid) == conn->cid)) |
e48354ce NB |
2275 | logout_remove = 1; |
2276 | ||
2277 | spin_lock_bh(&conn->cmd_lock); | |
2fbb471e | 2278 | list_add_tail(&cmd->i_conn_node, &conn->conn_cmd_list); |
e48354ce NB |
2279 | spin_unlock_bh(&conn->cmd_lock); |
2280 | ||
2281 | if (reason_code != ISCSI_LOGOUT_REASON_RECOVERY) | |
50e5c87d | 2282 | iscsit_ack_from_expstatsn(conn, be32_to_cpu(hdr->exp_statsn)); |
e48354ce NB |
2283 | |
2284 | /* | |
2285 | * Immediate commands are executed, well, immediately. | |
2286 | * Non-Immediate Logout Commands are executed in CmdSN order. | |
2287 | */ | |
c6037cc5 | 2288 | if (cmd->immediate_cmd) { |
e48354ce NB |
2289 | int ret = iscsit_execute_cmd(cmd, 0); |
2290 | ||
2291 | if (ret < 0) | |
2292 | return ret; | |
2293 | } else { | |
561bf158 | 2294 | cmdsn_ret = iscsit_sequence_cmd(conn, cmd, buf, hdr->cmdsn); |
ba159914 | 2295 | if (cmdsn_ret == CMDSN_LOWER_THAN_EXP) |
e48354ce | 2296 | logout_remove = 0; |
ba159914 NB |
2297 | else if (cmdsn_ret == CMDSN_ERROR_CANNOT_RECOVER) |
2298 | return -1; | |
e48354ce NB |
2299 | } |
2300 | ||
2301 | return logout_remove; | |
2302 | } | |
3e1c81a9 | 2303 | EXPORT_SYMBOL(iscsit_handle_logout_cmd); |
e48354ce NB |
2304 | |
2305 | static int iscsit_handle_snack( | |
2306 | struct iscsi_conn *conn, | |
2307 | unsigned char *buf) | |
2308 | { | |
e48354ce NB |
2309 | struct iscsi_snack *hdr; |
2310 | ||
2311 | hdr = (struct iscsi_snack *) buf; | |
2312 | hdr->flags &= ~ISCSI_FLAG_CMD_FINAL; | |
e48354ce NB |
2313 | |
2314 | pr_debug("Got ISCSI_INIT_SNACK, ITT: 0x%08x, ExpStatSN:" | |
2315 | " 0x%08x, Type: 0x%02x, BegRun: 0x%08x, RunLength: 0x%08x," | |
2316 | " CID: %hu\n", hdr->itt, hdr->exp_statsn, hdr->flags, | |
2317 | hdr->begrun, hdr->runlength, conn->cid); | |
2318 | ||
2319 | if (!conn->sess->sess_ops->ErrorRecoveryLevel) { | |
2320 | pr_err("Initiator sent SNACK request while in" | |
2321 | " ErrorRecoveryLevel=0.\n"); | |
ba159914 NB |
2322 | return iscsit_add_reject(conn, ISCSI_REASON_PROTOCOL_ERROR, |
2323 | buf); | |
e48354ce NB |
2324 | } |
2325 | /* | |
2326 | * SNACK_DATA and SNACK_R2T are both 0, so check which function to | |
2327 | * call from inside iscsi_send_recovery_datain_or_r2t(). | |
2328 | */ | |
2329 | switch (hdr->flags & ISCSI_FLAG_SNACK_TYPE_MASK) { | |
2330 | case 0: | |
2331 | return iscsit_handle_recovery_datain_or_r2t(conn, buf, | |
50e5c87d CH |
2332 | hdr->itt, |
2333 | be32_to_cpu(hdr->ttt), | |
2334 | be32_to_cpu(hdr->begrun), | |
2335 | be32_to_cpu(hdr->runlength)); | |
e48354ce | 2336 | case ISCSI_FLAG_SNACK_TYPE_STATUS: |
50e5c87d CH |
2337 | return iscsit_handle_status_snack(conn, hdr->itt, |
2338 | be32_to_cpu(hdr->ttt), | |
2339 | be32_to_cpu(hdr->begrun), be32_to_cpu(hdr->runlength)); | |
e48354ce | 2340 | case ISCSI_FLAG_SNACK_TYPE_DATA_ACK: |
50e5c87d CH |
2341 | return iscsit_handle_data_ack(conn, be32_to_cpu(hdr->ttt), |
2342 | be32_to_cpu(hdr->begrun), | |
2343 | be32_to_cpu(hdr->runlength)); | |
e48354ce NB |
2344 | case ISCSI_FLAG_SNACK_TYPE_RDATA: |
2345 | /* FIXME: Support R-Data SNACK */ | |
2346 | pr_err("R-Data SNACK Not Supported.\n"); | |
ba159914 NB |
2347 | return iscsit_add_reject(conn, ISCSI_REASON_PROTOCOL_ERROR, |
2348 | buf); | |
e48354ce NB |
2349 | default: |
2350 | pr_err("Unknown SNACK type 0x%02x, protocol" | |
2351 | " error.\n", hdr->flags & 0x0f); | |
ba159914 NB |
2352 | return iscsit_add_reject(conn, ISCSI_REASON_PROTOCOL_ERROR, |
2353 | buf); | |
e48354ce NB |
2354 | } |
2355 | ||
2356 | return 0; | |
2357 | } | |
2358 | ||
2359 | static void iscsit_rx_thread_wait_for_tcp(struct iscsi_conn *conn) | |
2360 | { | |
2361 | if ((conn->sock->sk->sk_shutdown & SEND_SHUTDOWN) || | |
2362 | (conn->sock->sk->sk_shutdown & RCV_SHUTDOWN)) { | |
2363 | wait_for_completion_interruptible_timeout( | |
2364 | &conn->rx_half_close_comp, | |
2365 | ISCSI_RX_THREAD_TCP_TIMEOUT * HZ); | |
2366 | } | |
2367 | } | |
2368 | ||
2369 | static int iscsit_handle_immediate_data( | |
2370 | struct iscsi_cmd *cmd, | |
3e1c81a9 | 2371 | struct iscsi_scsi_req *hdr, |
e48354ce NB |
2372 | u32 length) |
2373 | { | |
2374 | int iov_ret, rx_got = 0, rx_size = 0; | |
2375 | u32 checksum, iov_count = 0, padding = 0; | |
2376 | struct iscsi_conn *conn = cmd->conn; | |
2377 | struct kvec *iov; | |
2378 | ||
2379 | iov_ret = iscsit_map_iovec(cmd, cmd->iov_data, cmd->write_data_done, length); | |
2380 | if (iov_ret < 0) | |
2381 | return IMMEDIATE_DATA_CANNOT_RECOVER; | |
2382 | ||
2383 | rx_size = length; | |
2384 | iov_count = iov_ret; | |
2385 | iov = &cmd->iov_data[0]; | |
2386 | ||
2387 | padding = ((-length) & 3); | |
2388 | if (padding != 0) { | |
2389 | iov[iov_count].iov_base = cmd->pad_bytes; | |
2390 | iov[iov_count++].iov_len = padding; | |
2391 | rx_size += padding; | |
2392 | } | |
2393 | ||
2394 | if (conn->conn_ops->DataDigest) { | |
2395 | iov[iov_count].iov_base = &checksum; | |
2396 | iov[iov_count++].iov_len = ISCSI_CRC_LEN; | |
2397 | rx_size += ISCSI_CRC_LEN; | |
2398 | } | |
2399 | ||
2400 | rx_got = rx_data(conn, &cmd->iov_data[0], iov_count, rx_size); | |
2401 | ||
2402 | iscsit_unmap_iovec(cmd); | |
2403 | ||
2404 | if (rx_got != rx_size) { | |
2405 | iscsit_rx_thread_wait_for_tcp(conn); | |
2406 | return IMMEDIATE_DATA_CANNOT_RECOVER; | |
2407 | } | |
2408 | ||
2409 | if (conn->conn_ops->DataDigest) { | |
2410 | u32 data_crc; | |
2411 | ||
2412 | data_crc = iscsit_do_crypto_hash_sg(&conn->conn_rx_hash, cmd, | |
2413 | cmd->write_data_done, length, padding, | |
2414 | cmd->pad_bytes); | |
2415 | ||
2416 | if (checksum != data_crc) { | |
2417 | pr_err("ImmediateData CRC32C DataDigest 0x%08x" | |
2418 | " does not match computed 0x%08x\n", checksum, | |
2419 | data_crc); | |
2420 | ||
2421 | if (!conn->sess->sess_ops->ErrorRecoveryLevel) { | |
2422 | pr_err("Unable to recover from" | |
2423 | " Immediate Data digest failure while" | |
2424 | " in ERL=0.\n"); | |
ba159914 | 2425 | iscsit_reject_cmd(cmd, |
e48354ce | 2426 | ISCSI_REASON_DATA_DIGEST_ERROR, |
ba159914 | 2427 | (unsigned char *)hdr); |
e48354ce NB |
2428 | return IMMEDIATE_DATA_CANNOT_RECOVER; |
2429 | } else { | |
ba159914 | 2430 | iscsit_reject_cmd(cmd, |
e48354ce | 2431 | ISCSI_REASON_DATA_DIGEST_ERROR, |
ba159914 | 2432 | (unsigned char *)hdr); |
e48354ce NB |
2433 | return IMMEDIATE_DATA_ERL1_CRC_FAILURE; |
2434 | } | |
2435 | } else { | |
2436 | pr_debug("Got CRC32C DataDigest 0x%08x for" | |
2437 | " %u bytes of Immediate Data\n", checksum, | |
2438 | length); | |
2439 | } | |
2440 | } | |
2441 | ||
2442 | cmd->write_data_done += length; | |
2443 | ||
ebf1d95c | 2444 | if (cmd->write_data_done == cmd->se_cmd.data_length) { |
e48354ce NB |
2445 | spin_lock_bh(&cmd->istate_lock); |
2446 | cmd->cmd_flags |= ICF_GOT_LAST_DATAOUT; | |
2447 | cmd->i_state = ISTATE_RECEIVED_LAST_DATAOUT; | |
2448 | spin_unlock_bh(&cmd->istate_lock); | |
2449 | } | |
2450 | ||
2451 | return IMMEDIATE_DATA_NORMAL_OPERATION; | |
2452 | } | |
2453 | ||
2454 | /* | |
2455 | * Called with sess->conn_lock held. | |
2456 | */ | |
2457 | /* #warning iscsi_build_conn_drop_async_message() only sends out on connections | |
2458 | with active network interface */ | |
2459 | static void iscsit_build_conn_drop_async_message(struct iscsi_conn *conn) | |
2460 | { | |
2461 | struct iscsi_cmd *cmd; | |
2462 | struct iscsi_conn *conn_p; | |
2463 | ||
2464 | /* | |
2465 | * Only send a Asynchronous Message on connections whos network | |
2466 | * interface is still functional. | |
2467 | */ | |
2468 | list_for_each_entry(conn_p, &conn->sess->sess_conn_list, conn_list) { | |
2469 | if (conn_p->conn_state == TARG_CONN_STATE_LOGGED_IN) { | |
2470 | iscsit_inc_conn_usage_count(conn_p); | |
2471 | break; | |
2472 | } | |
2473 | } | |
2474 | ||
2475 | if (!conn_p) | |
2476 | return; | |
2477 | ||
3c989d76 | 2478 | cmd = iscsit_allocate_cmd(conn_p, GFP_ATOMIC); |
e48354ce NB |
2479 | if (!cmd) { |
2480 | iscsit_dec_conn_usage_count(conn_p); | |
2481 | return; | |
2482 | } | |
2483 | ||
2484 | cmd->logout_cid = conn->cid; | |
2485 | cmd->iscsi_opcode = ISCSI_OP_ASYNC_EVENT; | |
2486 | cmd->i_state = ISTATE_SEND_ASYNCMSG; | |
2487 | ||
2488 | spin_lock_bh(&conn_p->cmd_lock); | |
2fbb471e | 2489 | list_add_tail(&cmd->i_conn_node, &conn_p->conn_cmd_list); |
e48354ce NB |
2490 | spin_unlock_bh(&conn_p->cmd_lock); |
2491 | ||
2492 | iscsit_add_cmd_to_response_queue(cmd, conn_p, cmd->i_state); | |
2493 | iscsit_dec_conn_usage_count(conn_p); | |
2494 | } | |
2495 | ||
2496 | static int iscsit_send_conn_drop_async_message( | |
2497 | struct iscsi_cmd *cmd, | |
2498 | struct iscsi_conn *conn) | |
2499 | { | |
2500 | struct iscsi_async *hdr; | |
2501 | ||
2502 | cmd->tx_size = ISCSI_HDR_LEN; | |
2503 | cmd->iscsi_opcode = ISCSI_OP_ASYNC_EVENT; | |
2504 | ||
2505 | hdr = (struct iscsi_async *) cmd->pdu; | |
2506 | hdr->opcode = ISCSI_OP_ASYNC_EVENT; | |
2507 | hdr->flags = ISCSI_FLAG_CMD_FINAL; | |
66c7db68 | 2508 | cmd->init_task_tag = RESERVED_ITT; |
e48354ce NB |
2509 | cmd->targ_xfer_tag = 0xFFFFFFFF; |
2510 | put_unaligned_be64(0xFFFFFFFFFFFFFFFFULL, &hdr->rsvd4[0]); | |
2511 | cmd->stat_sn = conn->stat_sn++; | |
2512 | hdr->statsn = cpu_to_be32(cmd->stat_sn); | |
2513 | hdr->exp_cmdsn = cpu_to_be32(conn->sess->exp_cmd_sn); | |
2514 | hdr->max_cmdsn = cpu_to_be32(conn->sess->max_cmd_sn); | |
2515 | hdr->async_event = ISCSI_ASYNC_MSG_DROPPING_CONNECTION; | |
2516 | hdr->param1 = cpu_to_be16(cmd->logout_cid); | |
2517 | hdr->param2 = cpu_to_be16(conn->sess->sess_ops->DefaultTime2Wait); | |
2518 | hdr->param3 = cpu_to_be16(conn->sess->sess_ops->DefaultTime2Retain); | |
2519 | ||
2520 | if (conn->conn_ops->HeaderDigest) { | |
2521 | u32 *header_digest = (u32 *)&cmd->pdu[ISCSI_HDR_LEN]; | |
2522 | ||
80690fdb GU |
2523 | iscsit_do_crypto_hash_buf(&conn->conn_tx_hash, hdr, |
2524 | ISCSI_HDR_LEN, 0, NULL, (u8 *)header_digest); | |
e48354ce NB |
2525 | |
2526 | cmd->tx_size += ISCSI_CRC_LEN; | |
2527 | pr_debug("Attaching CRC32C HeaderDigest to" | |
2528 | " Async Message 0x%08x\n", *header_digest); | |
2529 | } | |
2530 | ||
2531 | cmd->iov_misc[0].iov_base = cmd->pdu; | |
2532 | cmd->iov_misc[0].iov_len = cmd->tx_size; | |
2533 | cmd->iov_misc_count = 1; | |
2534 | ||
2535 | pr_debug("Sending Connection Dropped Async Message StatSN:" | |
2536 | " 0x%08x, for CID: %hu on CID: %hu\n", cmd->stat_sn, | |
2537 | cmd->logout_cid, conn->cid); | |
2538 | return 0; | |
2539 | } | |
2540 | ||
6f3c0e69 AG |
2541 | static void iscsit_tx_thread_wait_for_tcp(struct iscsi_conn *conn) |
2542 | { | |
2543 | if ((conn->sock->sk->sk_shutdown & SEND_SHUTDOWN) || | |
2544 | (conn->sock->sk->sk_shutdown & RCV_SHUTDOWN)) { | |
2545 | wait_for_completion_interruptible_timeout( | |
2546 | &conn->tx_half_close_comp, | |
2547 | ISCSI_TX_THREAD_TCP_TIMEOUT * HZ); | |
2548 | } | |
2549 | } | |
2550 | ||
2ec5a8c1 NB |
2551 | static void |
2552 | iscsit_build_datain_pdu(struct iscsi_cmd *cmd, struct iscsi_conn *conn, | |
2553 | struct iscsi_datain *datain, struct iscsi_data_rsp *hdr, | |
2554 | bool set_statsn) | |
e48354ce | 2555 | { |
2ec5a8c1 NB |
2556 | hdr->opcode = ISCSI_OP_SCSI_DATA_IN; |
2557 | hdr->flags = datain->flags; | |
2558 | if (hdr->flags & ISCSI_FLAG_DATA_STATUS) { | |
2559 | if (cmd->se_cmd.se_cmd_flags & SCF_OVERFLOW_BIT) { | |
2560 | hdr->flags |= ISCSI_FLAG_DATA_OVERFLOW; | |
2561 | hdr->residual_count = cpu_to_be32(cmd->se_cmd.residual_count); | |
2562 | } else if (cmd->se_cmd.se_cmd_flags & SCF_UNDERFLOW_BIT) { | |
2563 | hdr->flags |= ISCSI_FLAG_DATA_UNDERFLOW; | |
2564 | hdr->residual_count = cpu_to_be32(cmd->se_cmd.residual_count); | |
2565 | } | |
2566 | } | |
2567 | hton24(hdr->dlength, datain->length); | |
2568 | if (hdr->flags & ISCSI_FLAG_DATA_ACK) | |
2569 | int_to_scsilun(cmd->se_cmd.orig_fe_lun, | |
2570 | (struct scsi_lun *)&hdr->lun); | |
2571 | else | |
2572 | put_unaligned_le64(0xFFFFFFFFFFFFFFFFULL, &hdr->lun); | |
2573 | ||
2574 | hdr->itt = cmd->init_task_tag; | |
2575 | ||
2576 | if (hdr->flags & ISCSI_FLAG_DATA_ACK) | |
2577 | hdr->ttt = cpu_to_be32(cmd->targ_xfer_tag); | |
2578 | else | |
2579 | hdr->ttt = cpu_to_be32(0xFFFFFFFF); | |
2580 | if (set_statsn) | |
2581 | hdr->statsn = cpu_to_be32(cmd->stat_sn); | |
2582 | else | |
2583 | hdr->statsn = cpu_to_be32(0xFFFFFFFF); | |
2584 | ||
2585 | hdr->exp_cmdsn = cpu_to_be32(conn->sess->exp_cmd_sn); | |
2586 | hdr->max_cmdsn = cpu_to_be32(conn->sess->max_cmd_sn); | |
2587 | hdr->datasn = cpu_to_be32(datain->data_sn); | |
2588 | hdr->offset = cpu_to_be32(datain->offset); | |
2589 | ||
2590 | pr_debug("Built DataIN ITT: 0x%08x, StatSN: 0x%08x," | |
2591 | " DataSN: 0x%08x, Offset: %u, Length: %u, CID: %hu\n", | |
2592 | cmd->init_task_tag, ntohl(hdr->statsn), ntohl(hdr->datasn), | |
2593 | ntohl(hdr->offset), datain->length, conn->cid); | |
2594 | } | |
2595 | ||
2596 | static int iscsit_send_datain(struct iscsi_cmd *cmd, struct iscsi_conn *conn) | |
2597 | { | |
2598 | struct iscsi_data_rsp *hdr = (struct iscsi_data_rsp *)&cmd->pdu[0]; | |
e48354ce NB |
2599 | struct iscsi_datain datain; |
2600 | struct iscsi_datain_req *dr; | |
e48354ce | 2601 | struct kvec *iov; |
2ec5a8c1 NB |
2602 | u32 iov_count = 0, tx_size = 0; |
2603 | int eodr = 0, ret, iov_ret; | |
2604 | bool set_statsn = false; | |
e48354ce NB |
2605 | |
2606 | memset(&datain, 0, sizeof(struct iscsi_datain)); | |
2607 | dr = iscsit_get_datain_values(cmd, &datain); | |
2608 | if (!dr) { | |
2609 | pr_err("iscsit_get_datain_values failed for ITT: 0x%08x\n", | |
2610 | cmd->init_task_tag); | |
2611 | return -1; | |
2612 | } | |
e48354ce NB |
2613 | /* |
2614 | * Be paranoid and double check the logic for now. | |
2615 | */ | |
ebf1d95c | 2616 | if ((datain.offset + datain.length) > cmd->se_cmd.data_length) { |
e48354ce NB |
2617 | pr_err("Command ITT: 0x%08x, datain.offset: %u and" |
2618 | " datain.length: %u exceeds cmd->data_length: %u\n", | |
2619 | cmd->init_task_tag, datain.offset, datain.length, | |
2ec5a8c1 | 2620 | cmd->se_cmd.data_length); |
e48354ce NB |
2621 | return -1; |
2622 | } | |
2623 | ||
04f3b31b | 2624 | atomic_long_add(datain.length, &conn->sess->tx_data_octets); |
e48354ce NB |
2625 | /* |
2626 | * Special case for successfully execution w/ both DATAIN | |
2627 | * and Sense Data. | |
2628 | */ | |
2629 | if ((datain.flags & ISCSI_FLAG_DATA_STATUS) && | |
2630 | (cmd->se_cmd.se_cmd_flags & SCF_TRANSPORT_TASK_SENSE)) | |
2631 | datain.flags &= ~ISCSI_FLAG_DATA_STATUS; | |
2632 | else { | |
2633 | if ((dr->dr_complete == DATAIN_COMPLETE_NORMAL) || | |
2634 | (dr->dr_complete == DATAIN_COMPLETE_CONNECTION_RECOVERY)) { | |
2635 | iscsit_increment_maxcmdsn(cmd, conn->sess); | |
2636 | cmd->stat_sn = conn->stat_sn++; | |
2ec5a8c1 | 2637 | set_statsn = true; |
e48354ce | 2638 | } else if (dr->dr_complete == |
2ec5a8c1 NB |
2639 | DATAIN_COMPLETE_WITHIN_COMMAND_RECOVERY) |
2640 | set_statsn = true; | |
e48354ce NB |
2641 | } |
2642 | ||
2ec5a8c1 | 2643 | iscsit_build_datain_pdu(cmd, conn, &datain, hdr, set_statsn); |
e48354ce NB |
2644 | |
2645 | iov = &cmd->iov_data[0]; | |
2646 | iov[iov_count].iov_base = cmd->pdu; | |
2647 | iov[iov_count++].iov_len = ISCSI_HDR_LEN; | |
2648 | tx_size += ISCSI_HDR_LEN; | |
2649 | ||
2650 | if (conn->conn_ops->HeaderDigest) { | |
2651 | u32 *header_digest = (u32 *)&cmd->pdu[ISCSI_HDR_LEN]; | |
2652 | ||
80690fdb GU |
2653 | iscsit_do_crypto_hash_buf(&conn->conn_tx_hash, cmd->pdu, |
2654 | ISCSI_HDR_LEN, 0, NULL, (u8 *)header_digest); | |
e48354ce NB |
2655 | |
2656 | iov[0].iov_len += ISCSI_CRC_LEN; | |
2657 | tx_size += ISCSI_CRC_LEN; | |
2658 | ||
2659 | pr_debug("Attaching CRC32 HeaderDigest" | |
2660 | " for DataIN PDU 0x%08x\n", *header_digest); | |
2661 | } | |
2662 | ||
2ec5a8c1 NB |
2663 | iov_ret = iscsit_map_iovec(cmd, &cmd->iov_data[1], |
2664 | datain.offset, datain.length); | |
e48354ce NB |
2665 | if (iov_ret < 0) |
2666 | return -1; | |
2667 | ||
2668 | iov_count += iov_ret; | |
2669 | tx_size += datain.length; | |
2670 | ||
2671 | cmd->padding = ((-datain.length) & 3); | |
2672 | if (cmd->padding) { | |
2673 | iov[iov_count].iov_base = cmd->pad_bytes; | |
2674 | iov[iov_count++].iov_len = cmd->padding; | |
2675 | tx_size += cmd->padding; | |
2676 | ||
2677 | pr_debug("Attaching %u padding bytes\n", | |
2678 | cmd->padding); | |
2679 | } | |
2680 | if (conn->conn_ops->DataDigest) { | |
2681 | cmd->data_crc = iscsit_do_crypto_hash_sg(&conn->conn_tx_hash, cmd, | |
2682 | datain.offset, datain.length, cmd->padding, cmd->pad_bytes); | |
2683 | ||
2684 | iov[iov_count].iov_base = &cmd->data_crc; | |
2685 | iov[iov_count++].iov_len = ISCSI_CRC_LEN; | |
2686 | tx_size += ISCSI_CRC_LEN; | |
2687 | ||
2688 | pr_debug("Attached CRC32C DataDigest %d bytes, crc" | |
2689 | " 0x%08x\n", datain.length+cmd->padding, cmd->data_crc); | |
2690 | } | |
2691 | ||
2692 | cmd->iov_data_count = iov_count; | |
2693 | cmd->tx_size = tx_size; | |
2694 | ||
6f3c0e69 AG |
2695 | /* sendpage is preferred but can't insert markers */ |
2696 | if (!conn->conn_ops->IFMarker) | |
2697 | ret = iscsit_fe_sendpage_sg(cmd, conn); | |
2698 | else | |
2699 | ret = iscsit_send_tx_data(cmd, conn, 0); | |
2700 | ||
2701 | iscsit_unmap_iovec(cmd); | |
2702 | ||
2703 | if (ret < 0) { | |
2704 | iscsit_tx_thread_wait_for_tcp(conn); | |
2705 | return ret; | |
2706 | } | |
2707 | ||
e48354ce | 2708 | if (dr->dr_complete) { |
6f3c0e69 | 2709 | eodr = (cmd->se_cmd.se_cmd_flags & SCF_TRANSPORT_TASK_SENSE) ? |
e48354ce NB |
2710 | 2 : 1; |
2711 | iscsit_free_datain_req(cmd, dr); | |
2712 | } | |
2713 | ||
6f3c0e69 | 2714 | return eodr; |
e48354ce NB |
2715 | } |
2716 | ||
2ec5a8c1 NB |
2717 | int |
2718 | iscsit_build_logout_rsp(struct iscsi_cmd *cmd, struct iscsi_conn *conn, | |
2719 | struct iscsi_logout_rsp *hdr) | |
e48354ce | 2720 | { |
e48354ce NB |
2721 | struct iscsi_conn *logout_conn = NULL; |
2722 | struct iscsi_conn_recovery *cr = NULL; | |
2723 | struct iscsi_session *sess = conn->sess; | |
e48354ce NB |
2724 | /* |
2725 | * The actual shutting down of Sessions and/or Connections | |
2726 | * for CLOSESESSION and CLOSECONNECTION Logout Requests | |
2727 | * is done in scsi_logout_post_handler(). | |
2728 | */ | |
2729 | switch (cmd->logout_reason) { | |
2730 | case ISCSI_LOGOUT_REASON_CLOSE_SESSION: | |
2731 | pr_debug("iSCSI session logout successful, setting" | |
2732 | " logout response to ISCSI_LOGOUT_SUCCESS.\n"); | |
2733 | cmd->logout_response = ISCSI_LOGOUT_SUCCESS; | |
2734 | break; | |
2735 | case ISCSI_LOGOUT_REASON_CLOSE_CONNECTION: | |
2736 | if (cmd->logout_response == ISCSI_LOGOUT_CID_NOT_FOUND) | |
2737 | break; | |
2738 | /* | |
2739 | * For CLOSECONNECTION logout requests carrying | |
2740 | * a matching logout CID -> local CID, the reference | |
2741 | * for the local CID will have been incremented in | |
2742 | * iscsi_logout_closeconnection(). | |
2743 | * | |
2744 | * For CLOSECONNECTION logout requests carrying | |
2745 | * a different CID than the connection it arrived | |
2746 | * on, the connection responding to cmd->logout_cid | |
2747 | * is stopped in iscsit_logout_post_handler_diffcid(). | |
2748 | */ | |
2749 | ||
2750 | pr_debug("iSCSI CID: %hu logout on CID: %hu" | |
2751 | " successful.\n", cmd->logout_cid, conn->cid); | |
2752 | cmd->logout_response = ISCSI_LOGOUT_SUCCESS; | |
2753 | break; | |
2754 | case ISCSI_LOGOUT_REASON_RECOVERY: | |
2755 | if ((cmd->logout_response == ISCSI_LOGOUT_RECOVERY_UNSUPPORTED) || | |
2756 | (cmd->logout_response == ISCSI_LOGOUT_CLEANUP_FAILED)) | |
2757 | break; | |
2758 | /* | |
2759 | * If the connection is still active from our point of view | |
2760 | * force connection recovery to occur. | |
2761 | */ | |
2762 | logout_conn = iscsit_get_conn_from_cid_rcfr(sess, | |
2763 | cmd->logout_cid); | |
ee1b1b9c | 2764 | if (logout_conn) { |
e48354ce NB |
2765 | iscsit_connection_reinstatement_rcfr(logout_conn); |
2766 | iscsit_dec_conn_usage_count(logout_conn); | |
2767 | } | |
2768 | ||
2769 | cr = iscsit_get_inactive_connection_recovery_entry( | |
2770 | conn->sess, cmd->logout_cid); | |
2771 | if (!cr) { | |
2772 | pr_err("Unable to locate CID: %hu for" | |
2773 | " REMOVECONNFORRECOVERY Logout Request.\n", | |
2774 | cmd->logout_cid); | |
2775 | cmd->logout_response = ISCSI_LOGOUT_CID_NOT_FOUND; | |
2776 | break; | |
2777 | } | |
2778 | ||
2779 | iscsit_discard_cr_cmds_by_expstatsn(cr, cmd->exp_stat_sn); | |
2780 | ||
2781 | pr_debug("iSCSI REMOVECONNFORRECOVERY logout" | |
2782 | " for recovery for CID: %hu on CID: %hu successful.\n", | |
2783 | cmd->logout_cid, conn->cid); | |
2784 | cmd->logout_response = ISCSI_LOGOUT_SUCCESS; | |
2785 | break; | |
2786 | default: | |
2787 | pr_err("Unknown cmd->logout_reason: 0x%02x\n", | |
2788 | cmd->logout_reason); | |
2789 | return -1; | |
2790 | } | |
2791 | ||
e48354ce NB |
2792 | hdr->opcode = ISCSI_OP_LOGOUT_RSP; |
2793 | hdr->flags |= ISCSI_FLAG_CMD_FINAL; | |
2794 | hdr->response = cmd->logout_response; | |
66c7db68 | 2795 | hdr->itt = cmd->init_task_tag; |
e48354ce NB |
2796 | cmd->stat_sn = conn->stat_sn++; |
2797 | hdr->statsn = cpu_to_be32(cmd->stat_sn); | |
2798 | ||
2799 | iscsit_increment_maxcmdsn(cmd, conn->sess); | |
2800 | hdr->exp_cmdsn = cpu_to_be32(conn->sess->exp_cmd_sn); | |
2801 | hdr->max_cmdsn = cpu_to_be32(conn->sess->max_cmd_sn); | |
2802 | ||
2ec5a8c1 NB |
2803 | pr_debug("Built Logout Response ITT: 0x%08x StatSN:" |
2804 | " 0x%08x Response: 0x%02x CID: %hu on CID: %hu\n", | |
2805 | cmd->init_task_tag, cmd->stat_sn, hdr->response, | |
2806 | cmd->logout_cid, conn->cid); | |
2807 | ||
2808 | return 0; | |
2809 | } | |
2810 | EXPORT_SYMBOL(iscsit_build_logout_rsp); | |
2811 | ||
2812 | static int | |
2813 | iscsit_send_logout(struct iscsi_cmd *cmd, struct iscsi_conn *conn) | |
2814 | { | |
2815 | struct kvec *iov; | |
2816 | int niov = 0, tx_size, rc; | |
2817 | ||
2818 | rc = iscsit_build_logout_rsp(cmd, conn, | |
2819 | (struct iscsi_logout_rsp *)&cmd->pdu[0]); | |
2820 | if (rc < 0) | |
2821 | return rc; | |
2822 | ||
2823 | tx_size = ISCSI_HDR_LEN; | |
e48354ce NB |
2824 | iov = &cmd->iov_misc[0]; |
2825 | iov[niov].iov_base = cmd->pdu; | |
2826 | iov[niov++].iov_len = ISCSI_HDR_LEN; | |
2827 | ||
2828 | if (conn->conn_ops->HeaderDigest) { | |
2829 | u32 *header_digest = (u32 *)&cmd->pdu[ISCSI_HDR_LEN]; | |
2830 | ||
80690fdb GU |
2831 | iscsit_do_crypto_hash_buf(&conn->conn_tx_hash, &cmd->pdu[0], |
2832 | ISCSI_HDR_LEN, 0, NULL, (u8 *)header_digest); | |
e48354ce NB |
2833 | |
2834 | iov[0].iov_len += ISCSI_CRC_LEN; | |
2835 | tx_size += ISCSI_CRC_LEN; | |
2836 | pr_debug("Attaching CRC32C HeaderDigest to" | |
2837 | " Logout Response 0x%08x\n", *header_digest); | |
2838 | } | |
2839 | cmd->iov_misc_count = niov; | |
2840 | cmd->tx_size = tx_size; | |
2841 | ||
e48354ce NB |
2842 | return 0; |
2843 | } | |
2844 | ||
2ec5a8c1 NB |
2845 | void |
2846 | iscsit_build_nopin_rsp(struct iscsi_cmd *cmd, struct iscsi_conn *conn, | |
2847 | struct iscsi_nopin *hdr, bool nopout_response) | |
2848 | { | |
2849 | hdr->opcode = ISCSI_OP_NOOP_IN; | |
2850 | hdr->flags |= ISCSI_FLAG_CMD_FINAL; | |
2851 | hton24(hdr->dlength, cmd->buf_ptr_size); | |
2852 | if (nopout_response) | |
2853 | put_unaligned_le64(0xFFFFFFFFFFFFFFFFULL, &hdr->lun); | |
2854 | hdr->itt = cmd->init_task_tag; | |
2855 | hdr->ttt = cpu_to_be32(cmd->targ_xfer_tag); | |
2856 | cmd->stat_sn = (nopout_response) ? conn->stat_sn++ : | |
2857 | conn->stat_sn; | |
2858 | hdr->statsn = cpu_to_be32(cmd->stat_sn); | |
2859 | ||
2860 | if (nopout_response) | |
2861 | iscsit_increment_maxcmdsn(cmd, conn->sess); | |
2862 | ||
2863 | hdr->exp_cmdsn = cpu_to_be32(conn->sess->exp_cmd_sn); | |
2864 | hdr->max_cmdsn = cpu_to_be32(conn->sess->max_cmd_sn); | |
2865 | ||
2866 | pr_debug("Built NOPIN %s Response ITT: 0x%08x, TTT: 0x%08x," | |
2867 | " StatSN: 0x%08x, Length %u\n", (nopout_response) ? | |
2868 | "Solicitied" : "Unsolicitied", cmd->init_task_tag, | |
2869 | cmd->targ_xfer_tag, cmd->stat_sn, cmd->buf_ptr_size); | |
2870 | } | |
2871 | EXPORT_SYMBOL(iscsit_build_nopin_rsp); | |
2872 | ||
e48354ce NB |
2873 | /* |
2874 | * Unsolicited NOPIN, either requesting a response or not. | |
2875 | */ | |
2876 | static int iscsit_send_unsolicited_nopin( | |
2877 | struct iscsi_cmd *cmd, | |
2878 | struct iscsi_conn *conn, | |
2879 | int want_response) | |
2880 | { | |
2ec5a8c1 NB |
2881 | struct iscsi_nopin *hdr = (struct iscsi_nopin *)&cmd->pdu[0]; |
2882 | int tx_size = ISCSI_HDR_LEN, ret; | |
e48354ce | 2883 | |
2ec5a8c1 | 2884 | iscsit_build_nopin_rsp(cmd, conn, hdr, false); |
e48354ce NB |
2885 | |
2886 | if (conn->conn_ops->HeaderDigest) { | |
2887 | u32 *header_digest = (u32 *)&cmd->pdu[ISCSI_HDR_LEN]; | |
2888 | ||
80690fdb GU |
2889 | iscsit_do_crypto_hash_buf(&conn->conn_tx_hash, hdr, |
2890 | ISCSI_HDR_LEN, 0, NULL, (u8 *)header_digest); | |
e48354ce NB |
2891 | |
2892 | tx_size += ISCSI_CRC_LEN; | |
2893 | pr_debug("Attaching CRC32C HeaderDigest to" | |
2894 | " NopIN 0x%08x\n", *header_digest); | |
2895 | } | |
2896 | ||
2897 | cmd->iov_misc[0].iov_base = cmd->pdu; | |
2898 | cmd->iov_misc[0].iov_len = tx_size; | |
2899 | cmd->iov_misc_count = 1; | |
2900 | cmd->tx_size = tx_size; | |
2901 | ||
2902 | pr_debug("Sending Unsolicited NOPIN TTT: 0x%08x StatSN:" | |
2903 | " 0x%08x CID: %hu\n", hdr->ttt, cmd->stat_sn, conn->cid); | |
2904 | ||
6f3c0e69 AG |
2905 | ret = iscsit_send_tx_data(cmd, conn, 1); |
2906 | if (ret < 0) { | |
2907 | iscsit_tx_thread_wait_for_tcp(conn); | |
2908 | return ret; | |
2909 | } | |
2910 | ||
2911 | spin_lock_bh(&cmd->istate_lock); | |
2912 | cmd->i_state = want_response ? | |
2913 | ISTATE_SENT_NOPIN_WANT_RESPONSE : ISTATE_SENT_STATUS; | |
2914 | spin_unlock_bh(&cmd->istate_lock); | |
2915 | ||
e48354ce NB |
2916 | return 0; |
2917 | } | |
2918 | ||
2ec5a8c1 NB |
2919 | static int |
2920 | iscsit_send_nopin(struct iscsi_cmd *cmd, struct iscsi_conn *conn) | |
e48354ce | 2921 | { |
2ec5a8c1 | 2922 | struct iscsi_nopin *hdr = (struct iscsi_nopin *)&cmd->pdu[0]; |
e48354ce | 2923 | struct kvec *iov; |
2ec5a8c1 NB |
2924 | u32 padding = 0; |
2925 | int niov = 0, tx_size; | |
e48354ce | 2926 | |
2ec5a8c1 | 2927 | iscsit_build_nopin_rsp(cmd, conn, hdr, true); |
e48354ce | 2928 | |
2ec5a8c1 | 2929 | tx_size = ISCSI_HDR_LEN; |
e48354ce NB |
2930 | iov = &cmd->iov_misc[0]; |
2931 | iov[niov].iov_base = cmd->pdu; | |
2932 | iov[niov++].iov_len = ISCSI_HDR_LEN; | |
2933 | ||
2934 | if (conn->conn_ops->HeaderDigest) { | |
2935 | u32 *header_digest = (u32 *)&cmd->pdu[ISCSI_HDR_LEN]; | |
2936 | ||
80690fdb GU |
2937 | iscsit_do_crypto_hash_buf(&conn->conn_tx_hash, hdr, |
2938 | ISCSI_HDR_LEN, 0, NULL, (u8 *)header_digest); | |
e48354ce NB |
2939 | |
2940 | iov[0].iov_len += ISCSI_CRC_LEN; | |
2941 | tx_size += ISCSI_CRC_LEN; | |
2942 | pr_debug("Attaching CRC32C HeaderDigest" | |
2943 | " to NopIn 0x%08x\n", *header_digest); | |
2944 | } | |
2945 | ||
2946 | /* | |
2947 | * NOPOUT Ping Data is attached to struct iscsi_cmd->buf_ptr. | |
2948 | * NOPOUT DataSegmentLength is at struct iscsi_cmd->buf_ptr_size. | |
2949 | */ | |
2950 | if (cmd->buf_ptr_size) { | |
2951 | iov[niov].iov_base = cmd->buf_ptr; | |
2952 | iov[niov++].iov_len = cmd->buf_ptr_size; | |
2953 | tx_size += cmd->buf_ptr_size; | |
2954 | ||
2955 | pr_debug("Echoing back %u bytes of ping" | |
2956 | " data.\n", cmd->buf_ptr_size); | |
2957 | ||
2958 | padding = ((-cmd->buf_ptr_size) & 3); | |
2959 | if (padding != 0) { | |
2960 | iov[niov].iov_base = &cmd->pad_bytes; | |
2961 | iov[niov++].iov_len = padding; | |
2962 | tx_size += padding; | |
2963 | pr_debug("Attaching %u additional" | |
2964 | " padding bytes.\n", padding); | |
2965 | } | |
2966 | if (conn->conn_ops->DataDigest) { | |
2967 | iscsit_do_crypto_hash_buf(&conn->conn_tx_hash, | |
2968 | cmd->buf_ptr, cmd->buf_ptr_size, | |
2969 | padding, (u8 *)&cmd->pad_bytes, | |
2970 | (u8 *)&cmd->data_crc); | |
2971 | ||
2972 | iov[niov].iov_base = &cmd->data_crc; | |
2973 | iov[niov++].iov_len = ISCSI_CRC_LEN; | |
2974 | tx_size += ISCSI_CRC_LEN; | |
2975 | pr_debug("Attached DataDigest for %u" | |
2976 | " bytes of ping data, CRC 0x%08x\n", | |
2977 | cmd->buf_ptr_size, cmd->data_crc); | |
2978 | } | |
2979 | } | |
2980 | ||
2981 | cmd->iov_misc_count = niov; | |
2982 | cmd->tx_size = tx_size; | |
2983 | ||
e48354ce NB |
2984 | return 0; |
2985 | } | |
2986 | ||
6f3c0e69 | 2987 | static int iscsit_send_r2t( |
e48354ce NB |
2988 | struct iscsi_cmd *cmd, |
2989 | struct iscsi_conn *conn) | |
2990 | { | |
2991 | int tx_size = 0; | |
2992 | struct iscsi_r2t *r2t; | |
2993 | struct iscsi_r2t_rsp *hdr; | |
6f3c0e69 | 2994 | int ret; |
e48354ce NB |
2995 | |
2996 | r2t = iscsit_get_r2t_from_list(cmd); | |
2997 | if (!r2t) | |
2998 | return -1; | |
2999 | ||
3000 | hdr = (struct iscsi_r2t_rsp *) cmd->pdu; | |
3001 | memset(hdr, 0, ISCSI_HDR_LEN); | |
3002 | hdr->opcode = ISCSI_OP_R2T; | |
3003 | hdr->flags |= ISCSI_FLAG_CMD_FINAL; | |
3004 | int_to_scsilun(cmd->se_cmd.orig_fe_lun, | |
3005 | (struct scsi_lun *)&hdr->lun); | |
66c7db68 | 3006 | hdr->itt = cmd->init_task_tag; |
e48354ce NB |
3007 | spin_lock_bh(&conn->sess->ttt_lock); |
3008 | r2t->targ_xfer_tag = conn->sess->targ_xfer_tag++; | |
3009 | if (r2t->targ_xfer_tag == 0xFFFFFFFF) | |
3010 | r2t->targ_xfer_tag = conn->sess->targ_xfer_tag++; | |
3011 | spin_unlock_bh(&conn->sess->ttt_lock); | |
3012 | hdr->ttt = cpu_to_be32(r2t->targ_xfer_tag); | |
3013 | hdr->statsn = cpu_to_be32(conn->stat_sn); | |
3014 | hdr->exp_cmdsn = cpu_to_be32(conn->sess->exp_cmd_sn); | |
3015 | hdr->max_cmdsn = cpu_to_be32(conn->sess->max_cmd_sn); | |
3016 | hdr->r2tsn = cpu_to_be32(r2t->r2t_sn); | |
3017 | hdr->data_offset = cpu_to_be32(r2t->offset); | |
3018 | hdr->data_length = cpu_to_be32(r2t->xfer_len); | |
3019 | ||
3020 | cmd->iov_misc[0].iov_base = cmd->pdu; | |
3021 | cmd->iov_misc[0].iov_len = ISCSI_HDR_LEN; | |
3022 | tx_size += ISCSI_HDR_LEN; | |
3023 | ||
3024 | if (conn->conn_ops->HeaderDigest) { | |
3025 | u32 *header_digest = (u32 *)&cmd->pdu[ISCSI_HDR_LEN]; | |
3026 | ||
80690fdb GU |
3027 | iscsit_do_crypto_hash_buf(&conn->conn_tx_hash, hdr, |
3028 | ISCSI_HDR_LEN, 0, NULL, (u8 *)header_digest); | |
e48354ce NB |
3029 | |
3030 | cmd->iov_misc[0].iov_len += ISCSI_CRC_LEN; | |
3031 | tx_size += ISCSI_CRC_LEN; | |
3032 | pr_debug("Attaching CRC32 HeaderDigest for R2T" | |
3033 | " PDU 0x%08x\n", *header_digest); | |
3034 | } | |
3035 | ||
3036 | pr_debug("Built %sR2T, ITT: 0x%08x, TTT: 0x%08x, StatSN:" | |
3037 | " 0x%08x, R2TSN: 0x%08x, Offset: %u, DDTL: %u, CID: %hu\n", | |
3038 | (!r2t->recovery_r2t) ? "" : "Recovery ", cmd->init_task_tag, | |
3039 | r2t->targ_xfer_tag, ntohl(hdr->statsn), r2t->r2t_sn, | |
3040 | r2t->offset, r2t->xfer_len, conn->cid); | |
3041 | ||
3042 | cmd->iov_misc_count = 1; | |
3043 | cmd->tx_size = tx_size; | |
3044 | ||
3045 | spin_lock_bh(&cmd->r2t_lock); | |
3046 | r2t->sent_r2t = 1; | |
3047 | spin_unlock_bh(&cmd->r2t_lock); | |
3048 | ||
6f3c0e69 AG |
3049 | ret = iscsit_send_tx_data(cmd, conn, 1); |
3050 | if (ret < 0) { | |
3051 | iscsit_tx_thread_wait_for_tcp(conn); | |
3052 | return ret; | |
3053 | } | |
3054 | ||
3055 | spin_lock_bh(&cmd->dataout_timeout_lock); | |
3056 | iscsit_start_dataout_timer(cmd, conn); | |
3057 | spin_unlock_bh(&cmd->dataout_timeout_lock); | |
3058 | ||
e48354ce NB |
3059 | return 0; |
3060 | } | |
3061 | ||
3062 | /* | |
8b1e1244 AG |
3063 | * @recovery: If called from iscsi_task_reassign_complete_write() for |
3064 | * connection recovery. | |
e48354ce NB |
3065 | */ |
3066 | int iscsit_build_r2ts_for_cmd( | |
e48354ce | 3067 | struct iscsi_conn *conn, |
3e1c81a9 | 3068 | struct iscsi_cmd *cmd, |
8b1e1244 | 3069 | bool recovery) |
e48354ce NB |
3070 | { |
3071 | int first_r2t = 1; | |
3072 | u32 offset = 0, xfer_len = 0; | |
3073 | ||
3074 | spin_lock_bh(&cmd->r2t_lock); | |
3075 | if (cmd->cmd_flags & ICF_SENT_LAST_R2T) { | |
3076 | spin_unlock_bh(&cmd->r2t_lock); | |
3077 | return 0; | |
3078 | } | |
3079 | ||
8b1e1244 AG |
3080 | if (conn->sess->sess_ops->DataSequenceInOrder && |
3081 | !recovery) | |
c6037cc5 | 3082 | cmd->r2t_offset = max(cmd->r2t_offset, cmd->write_data_done); |
e48354ce NB |
3083 | |
3084 | while (cmd->outstanding_r2ts < conn->sess->sess_ops->MaxOutstandingR2T) { | |
3085 | if (conn->sess->sess_ops->DataSequenceInOrder) { | |
3086 | offset = cmd->r2t_offset; | |
3087 | ||
8b1e1244 AG |
3088 | if (first_r2t && recovery) { |
3089 | int new_data_end = offset + | |
3090 | conn->sess->sess_ops->MaxBurstLength - | |
3091 | cmd->next_burst_len; | |
3092 | ||
ebf1d95c AG |
3093 | if (new_data_end > cmd->se_cmd.data_length) |
3094 | xfer_len = cmd->se_cmd.data_length - offset; | |
8b1e1244 AG |
3095 | else |
3096 | xfer_len = | |
3097 | conn->sess->sess_ops->MaxBurstLength - | |
3098 | cmd->next_burst_len; | |
e48354ce | 3099 | } else { |
8b1e1244 AG |
3100 | int new_data_end = offset + |
3101 | conn->sess->sess_ops->MaxBurstLength; | |
3102 | ||
ebf1d95c AG |
3103 | if (new_data_end > cmd->se_cmd.data_length) |
3104 | xfer_len = cmd->se_cmd.data_length - offset; | |
8b1e1244 AG |
3105 | else |
3106 | xfer_len = conn->sess->sess_ops->MaxBurstLength; | |
e48354ce NB |
3107 | } |
3108 | cmd->r2t_offset += xfer_len; | |
3109 | ||
ebf1d95c | 3110 | if (cmd->r2t_offset == cmd->se_cmd.data_length) |
e48354ce NB |
3111 | cmd->cmd_flags |= ICF_SENT_LAST_R2T; |
3112 | } else { | |
3113 | struct iscsi_seq *seq; | |
3114 | ||
3115 | seq = iscsit_get_seq_holder_for_r2t(cmd); | |
3116 | if (!seq) { | |
3117 | spin_unlock_bh(&cmd->r2t_lock); | |
3118 | return -1; | |
3119 | } | |
3120 | ||
3121 | offset = seq->offset; | |
3122 | xfer_len = seq->xfer_len; | |
3123 | ||
3124 | if (cmd->seq_send_order == cmd->seq_count) | |
3125 | cmd->cmd_flags |= ICF_SENT_LAST_R2T; | |
3126 | } | |
3127 | cmd->outstanding_r2ts++; | |
3128 | first_r2t = 0; | |
3129 | ||
3130 | if (iscsit_add_r2t_to_list(cmd, offset, xfer_len, 0, 0) < 0) { | |
3131 | spin_unlock_bh(&cmd->r2t_lock); | |
3132 | return -1; | |
3133 | } | |
3134 | ||
3135 | if (cmd->cmd_flags & ICF_SENT_LAST_R2T) | |
3136 | break; | |
3137 | } | |
3138 | spin_unlock_bh(&cmd->r2t_lock); | |
3139 | ||
3140 | return 0; | |
3141 | } | |
3142 | ||
2ec5a8c1 NB |
3143 | void iscsit_build_rsp_pdu(struct iscsi_cmd *cmd, struct iscsi_conn *conn, |
3144 | bool inc_stat_sn, struct iscsi_scsi_rsp *hdr) | |
e48354ce | 3145 | { |
2ec5a8c1 | 3146 | if (inc_stat_sn) |
e48354ce NB |
3147 | cmd->stat_sn = conn->stat_sn++; |
3148 | ||
04f3b31b | 3149 | atomic_long_inc(&conn->sess->rsp_pdus); |
e48354ce | 3150 | |
e48354ce NB |
3151 | memset(hdr, 0, ISCSI_HDR_LEN); |
3152 | hdr->opcode = ISCSI_OP_SCSI_CMD_RSP; | |
3153 | hdr->flags |= ISCSI_FLAG_CMD_FINAL; | |
3154 | if (cmd->se_cmd.se_cmd_flags & SCF_OVERFLOW_BIT) { | |
3155 | hdr->flags |= ISCSI_FLAG_CMD_OVERFLOW; | |
7e46cf02 | 3156 | hdr->residual_count = cpu_to_be32(cmd->se_cmd.residual_count); |
e48354ce NB |
3157 | } else if (cmd->se_cmd.se_cmd_flags & SCF_UNDERFLOW_BIT) { |
3158 | hdr->flags |= ISCSI_FLAG_CMD_UNDERFLOW; | |
7e46cf02 | 3159 | hdr->residual_count = cpu_to_be32(cmd->se_cmd.residual_count); |
e48354ce NB |
3160 | } |
3161 | hdr->response = cmd->iscsi_response; | |
3162 | hdr->cmd_status = cmd->se_cmd.scsi_status; | |
66c7db68 | 3163 | hdr->itt = cmd->init_task_tag; |
e48354ce NB |
3164 | hdr->statsn = cpu_to_be32(cmd->stat_sn); |
3165 | ||
3166 | iscsit_increment_maxcmdsn(cmd, conn->sess); | |
3167 | hdr->exp_cmdsn = cpu_to_be32(conn->sess->exp_cmd_sn); | |
3168 | hdr->max_cmdsn = cpu_to_be32(conn->sess->max_cmd_sn); | |
3169 | ||
2ec5a8c1 NB |
3170 | pr_debug("Built SCSI Response, ITT: 0x%08x, StatSN: 0x%08x," |
3171 | " Response: 0x%02x, SAM Status: 0x%02x, CID: %hu\n", | |
3172 | cmd->init_task_tag, cmd->stat_sn, cmd->se_cmd.scsi_status, | |
3173 | cmd->se_cmd.scsi_status, conn->cid); | |
3174 | } | |
3175 | EXPORT_SYMBOL(iscsit_build_rsp_pdu); | |
3176 | ||
3177 | static int iscsit_send_response(struct iscsi_cmd *cmd, struct iscsi_conn *conn) | |
3178 | { | |
3179 | struct iscsi_scsi_rsp *hdr = (struct iscsi_scsi_rsp *)&cmd->pdu[0]; | |
3180 | struct kvec *iov; | |
3181 | u32 padding = 0, tx_size = 0; | |
3182 | int iov_count = 0; | |
3183 | bool inc_stat_sn = (cmd->i_state == ISTATE_SEND_STATUS); | |
3184 | ||
3185 | iscsit_build_rsp_pdu(cmd, conn, inc_stat_sn, hdr); | |
3186 | ||
e48354ce NB |
3187 | iov = &cmd->iov_misc[0]; |
3188 | iov[iov_count].iov_base = cmd->pdu; | |
3189 | iov[iov_count++].iov_len = ISCSI_HDR_LEN; | |
3190 | tx_size += ISCSI_HDR_LEN; | |
3191 | ||
3192 | /* | |
3193 | * Attach SENSE DATA payload to iSCSI Response PDU | |
3194 | */ | |
3195 | if (cmd->se_cmd.sense_buffer && | |
3196 | ((cmd->se_cmd.se_cmd_flags & SCF_TRANSPORT_TASK_SENSE) || | |
3197 | (cmd->se_cmd.se_cmd_flags & SCF_EMULATED_TASK_SENSE))) { | |
9c58b7dd RD |
3198 | put_unaligned_be16(cmd->se_cmd.scsi_sense_length, cmd->sense_buffer); |
3199 | cmd->se_cmd.scsi_sense_length += sizeof (__be16); | |
3200 | ||
e48354ce | 3201 | padding = -(cmd->se_cmd.scsi_sense_length) & 3; |
50e5c87d | 3202 | hton24(hdr->dlength, (u32)cmd->se_cmd.scsi_sense_length); |
9c58b7dd | 3203 | iov[iov_count].iov_base = cmd->sense_buffer; |
e48354ce NB |
3204 | iov[iov_count++].iov_len = |
3205 | (cmd->se_cmd.scsi_sense_length + padding); | |
3206 | tx_size += cmd->se_cmd.scsi_sense_length; | |
3207 | ||
3208 | if (padding) { | |
9c58b7dd | 3209 | memset(cmd->sense_buffer + |
e48354ce NB |
3210 | cmd->se_cmd.scsi_sense_length, 0, padding); |
3211 | tx_size += padding; | |
3212 | pr_debug("Adding %u bytes of padding to" | |
3213 | " SENSE.\n", padding); | |
3214 | } | |
3215 | ||
3216 | if (conn->conn_ops->DataDigest) { | |
3217 | iscsit_do_crypto_hash_buf(&conn->conn_tx_hash, | |
9c58b7dd | 3218 | cmd->sense_buffer, |
e48354ce NB |
3219 | (cmd->se_cmd.scsi_sense_length + padding), |
3220 | 0, NULL, (u8 *)&cmd->data_crc); | |
3221 | ||
3222 | iov[iov_count].iov_base = &cmd->data_crc; | |
3223 | iov[iov_count++].iov_len = ISCSI_CRC_LEN; | |
3224 | tx_size += ISCSI_CRC_LEN; | |
3225 | ||
3226 | pr_debug("Attaching CRC32 DataDigest for" | |
3227 | " SENSE, %u bytes CRC 0x%08x\n", | |
3228 | (cmd->se_cmd.scsi_sense_length + padding), | |
3229 | cmd->data_crc); | |
3230 | } | |
3231 | ||
3232 | pr_debug("Attaching SENSE DATA: %u bytes to iSCSI" | |
3233 | " Response PDU\n", | |
3234 | cmd->se_cmd.scsi_sense_length); | |
3235 | } | |
3236 | ||
3237 | if (conn->conn_ops->HeaderDigest) { | |
3238 | u32 *header_digest = (u32 *)&cmd->pdu[ISCSI_HDR_LEN]; | |
3239 | ||
80690fdb GU |
3240 | iscsit_do_crypto_hash_buf(&conn->conn_tx_hash, cmd->pdu, |
3241 | ISCSI_HDR_LEN, 0, NULL, (u8 *)header_digest); | |
e48354ce NB |
3242 | |
3243 | iov[0].iov_len += ISCSI_CRC_LEN; | |
3244 | tx_size += ISCSI_CRC_LEN; | |
3245 | pr_debug("Attaching CRC32 HeaderDigest for Response" | |
3246 | " PDU 0x%08x\n", *header_digest); | |
3247 | } | |
3248 | ||
3249 | cmd->iov_misc_count = iov_count; | |
3250 | cmd->tx_size = tx_size; | |
3251 | ||
e48354ce NB |
3252 | return 0; |
3253 | } | |
3254 | ||
3255 | static u8 iscsit_convert_tcm_tmr_rsp(struct se_tmr_req *se_tmr) | |
3256 | { | |
3257 | switch (se_tmr->response) { | |
3258 | case TMR_FUNCTION_COMPLETE: | |
3259 | return ISCSI_TMF_RSP_COMPLETE; | |
3260 | case TMR_TASK_DOES_NOT_EXIST: | |
3261 | return ISCSI_TMF_RSP_NO_TASK; | |
3262 | case TMR_LUN_DOES_NOT_EXIST: | |
3263 | return ISCSI_TMF_RSP_NO_LUN; | |
3264 | case TMR_TASK_MGMT_FUNCTION_NOT_SUPPORTED: | |
3265 | return ISCSI_TMF_RSP_NOT_SUPPORTED; | |
e48354ce NB |
3266 | case TMR_FUNCTION_REJECTED: |
3267 | default: | |
3268 | return ISCSI_TMF_RSP_REJECTED; | |
3269 | } | |
3270 | } | |
3271 | ||
2ec5a8c1 NB |
3272 | void |
3273 | iscsit_build_task_mgt_rsp(struct iscsi_cmd *cmd, struct iscsi_conn *conn, | |
3274 | struct iscsi_tm_rsp *hdr) | |
e48354ce NB |
3275 | { |
3276 | struct se_tmr_req *se_tmr = cmd->se_cmd.se_tmr_req; | |
e48354ce | 3277 | |
e48354ce | 3278 | hdr->opcode = ISCSI_OP_SCSI_TMFUNC_RSP; |
7ae0b103 | 3279 | hdr->flags = ISCSI_FLAG_CMD_FINAL; |
e48354ce | 3280 | hdr->response = iscsit_convert_tcm_tmr_rsp(se_tmr); |
66c7db68 | 3281 | hdr->itt = cmd->init_task_tag; |
e48354ce NB |
3282 | cmd->stat_sn = conn->stat_sn++; |
3283 | hdr->statsn = cpu_to_be32(cmd->stat_sn); | |
3284 | ||
3285 | iscsit_increment_maxcmdsn(cmd, conn->sess); | |
3286 | hdr->exp_cmdsn = cpu_to_be32(conn->sess->exp_cmd_sn); | |
3287 | hdr->max_cmdsn = cpu_to_be32(conn->sess->max_cmd_sn); | |
3288 | ||
2ec5a8c1 NB |
3289 | pr_debug("Built Task Management Response ITT: 0x%08x," |
3290 | " StatSN: 0x%08x, Response: 0x%02x, CID: %hu\n", | |
3291 | cmd->init_task_tag, cmd->stat_sn, hdr->response, conn->cid); | |
3292 | } | |
3293 | EXPORT_SYMBOL(iscsit_build_task_mgt_rsp); | |
3294 | ||
3295 | static int | |
3296 | iscsit_send_task_mgt_rsp(struct iscsi_cmd *cmd, struct iscsi_conn *conn) | |
3297 | { | |
3298 | struct iscsi_tm_rsp *hdr = (struct iscsi_tm_rsp *)&cmd->pdu[0]; | |
3299 | u32 tx_size = 0; | |
3300 | ||
3301 | iscsit_build_task_mgt_rsp(cmd, conn, hdr); | |
3302 | ||
e48354ce NB |
3303 | cmd->iov_misc[0].iov_base = cmd->pdu; |
3304 | cmd->iov_misc[0].iov_len = ISCSI_HDR_LEN; | |
3305 | tx_size += ISCSI_HDR_LEN; | |
3306 | ||
3307 | if (conn->conn_ops->HeaderDigest) { | |
3308 | u32 *header_digest = (u32 *)&cmd->pdu[ISCSI_HDR_LEN]; | |
3309 | ||
80690fdb GU |
3310 | iscsit_do_crypto_hash_buf(&conn->conn_tx_hash, hdr, |
3311 | ISCSI_HDR_LEN, 0, NULL, (u8 *)header_digest); | |
e48354ce NB |
3312 | |
3313 | cmd->iov_misc[0].iov_len += ISCSI_CRC_LEN; | |
3314 | tx_size += ISCSI_CRC_LEN; | |
3315 | pr_debug("Attaching CRC32 HeaderDigest for Task" | |
3316 | " Mgmt Response PDU 0x%08x\n", *header_digest); | |
3317 | } | |
3318 | ||
3319 | cmd->iov_misc_count = 1; | |
3320 | cmd->tx_size = tx_size; | |
3321 | ||
e48354ce NB |
3322 | return 0; |
3323 | } | |
3324 | ||
2f9bc894 NB |
3325 | static bool iscsit_check_inaddr_any(struct iscsi_np *np) |
3326 | { | |
3327 | bool ret = false; | |
3328 | ||
3329 | if (np->np_sockaddr.ss_family == AF_INET6) { | |
3330 | const struct sockaddr_in6 sin6 = { | |
3331 | .sin6_addr = IN6ADDR_ANY_INIT }; | |
3332 | struct sockaddr_in6 *sock_in6 = | |
3333 | (struct sockaddr_in6 *)&np->np_sockaddr; | |
3334 | ||
3335 | if (!memcmp(sock_in6->sin6_addr.s6_addr, | |
3336 | sin6.sin6_addr.s6_addr, 16)) | |
3337 | ret = true; | |
3338 | } else { | |
3339 | struct sockaddr_in * sock_in = | |
3340 | (struct sockaddr_in *)&np->np_sockaddr; | |
3341 | ||
cea0b4ce | 3342 | if (sock_in->sin_addr.s_addr == htonl(INADDR_ANY)) |
2f9bc894 NB |
3343 | ret = true; |
3344 | } | |
3345 | ||
3346 | return ret; | |
3347 | } | |
3348 | ||
8b1e1244 AG |
3349 | #define SENDTARGETS_BUF_LIMIT 32768U |
3350 | ||
e48354ce NB |
3351 | static int iscsit_build_sendtargets_response(struct iscsi_cmd *cmd) |
3352 | { | |
3353 | char *payload = NULL; | |
3354 | struct iscsi_conn *conn = cmd->conn; | |
3355 | struct iscsi_portal_group *tpg; | |
3356 | struct iscsi_tiqn *tiqn; | |
3357 | struct iscsi_tpg_np *tpg_np; | |
3358 | int buffer_len, end_of_buf = 0, len = 0, payload_len = 0; | |
2dd1d53f | 3359 | int target_name_printed; |
8b1e1244 | 3360 | unsigned char buf[ISCSI_IQN_LEN+12]; /* iqn + "TargetName=" + \0 */ |
6665889c | 3361 | unsigned char *text_in = cmd->text_in_ptr, *text_ptr = NULL; |
e48354ce | 3362 | |
8b1e1244 AG |
3363 | buffer_len = max(conn->conn_ops->MaxRecvDataSegmentLength, |
3364 | SENDTARGETS_BUF_LIMIT); | |
e48354ce NB |
3365 | |
3366 | payload = kzalloc(buffer_len, GFP_KERNEL); | |
3367 | if (!payload) { | |
3368 | pr_err("Unable to allocate memory for sendtargets" | |
3369 | " response.\n"); | |
3370 | return -ENOMEM; | |
3371 | } | |
6665889c NB |
3372 | /* |
3373 | * Locate pointer to iqn./eui. string for IFC_SENDTARGETS_SINGLE | |
3374 | * explicit case.. | |
3375 | */ | |
3376 | if (cmd->cmd_flags & IFC_SENDTARGETS_SINGLE) { | |
3377 | text_ptr = strchr(text_in, '='); | |
3378 | if (!text_ptr) { | |
3379 | pr_err("Unable to locate '=' string in text_in:" | |
3380 | " %s\n", text_in); | |
4f45d320 | 3381 | kfree(payload); |
6665889c NB |
3382 | return -EINVAL; |
3383 | } | |
3384 | /* | |
3385 | * Skip over '=' character.. | |
3386 | */ | |
3387 | text_ptr += 1; | |
3388 | } | |
e48354ce NB |
3389 | |
3390 | spin_lock(&tiqn_lock); | |
3391 | list_for_each_entry(tiqn, &g_tiqn_list, tiqn_list) { | |
6665889c NB |
3392 | if ((cmd->cmd_flags & IFC_SENDTARGETS_SINGLE) && |
3393 | strcmp(tiqn->tiqn, text_ptr)) { | |
3394 | continue; | |
3395 | } | |
3396 | ||
2dd1d53f | 3397 | target_name_printed = 0; |
e48354ce NB |
3398 | |
3399 | spin_lock(&tiqn->tiqn_tpg_lock); | |
3400 | list_for_each_entry(tpg, &tiqn->tiqn_tpg_list, tpg_list) { | |
3401 | ||
2dd1d53f TG |
3402 | /* If demo_mode_discovery=0 and generate_node_acls=0 |
3403 | * (demo mode dislabed) do not return | |
3404 | * TargetName+TargetAddress unless a NodeACL exists. | |
3405 | */ | |
3406 | ||
3407 | if ((tpg->tpg_attrib.generate_node_acls == 0) && | |
3408 | (tpg->tpg_attrib.demo_mode_discovery == 0) && | |
3409 | (!core_tpg_get_initiator_node_acl(&tpg->tpg_se_tpg, | |
3410 | cmd->conn->sess->sess_ops->InitiatorName))) { | |
3411 | continue; | |
3412 | } | |
3413 | ||
e48354ce NB |
3414 | spin_lock(&tpg->tpg_state_lock); |
3415 | if ((tpg->tpg_state == TPG_STATE_FREE) || | |
3416 | (tpg->tpg_state == TPG_STATE_INACTIVE)) { | |
3417 | spin_unlock(&tpg->tpg_state_lock); | |
3418 | continue; | |
3419 | } | |
3420 | spin_unlock(&tpg->tpg_state_lock); | |
3421 | ||
3422 | spin_lock(&tpg->tpg_np_lock); | |
3423 | list_for_each_entry(tpg_np, &tpg->tpg_gnp_list, | |
3424 | tpg_np_list) { | |
2f9bc894 NB |
3425 | struct iscsi_np *np = tpg_np->tpg_np; |
3426 | bool inaddr_any = iscsit_check_inaddr_any(np); | |
3427 | ||
2dd1d53f TG |
3428 | if (!target_name_printed) { |
3429 | len = sprintf(buf, "TargetName=%s", | |
3430 | tiqn->tiqn); | |
3431 | len += 1; | |
3432 | ||
3433 | if ((len + payload_len) > buffer_len) { | |
3434 | spin_unlock(&tpg->tpg_np_lock); | |
3435 | spin_unlock(&tiqn->tiqn_tpg_lock); | |
3436 | end_of_buf = 1; | |
3437 | goto eob; | |
3438 | } | |
3439 | memcpy(payload + payload_len, buf, len); | |
3440 | payload_len += len; | |
3441 | target_name_printed = 1; | |
3442 | } | |
3443 | ||
e48354ce | 3444 | len = sprintf(buf, "TargetAddress=" |
dfecf611 CL |
3445 | "%s:%hu,%hu", |
3446 | (inaddr_any == false) ? | |
2f9bc894 | 3447 | np->np_ip : conn->local_ip, |
dfecf611 | 3448 | (inaddr_any == false) ? |
2f9bc894 | 3449 | np->np_port : conn->local_port, |
e48354ce NB |
3450 | tpg->tpgt); |
3451 | len += 1; | |
3452 | ||
3453 | if ((len + payload_len) > buffer_len) { | |
3454 | spin_unlock(&tpg->tpg_np_lock); | |
3455 | spin_unlock(&tiqn->tiqn_tpg_lock); | |
3456 | end_of_buf = 1; | |
3457 | goto eob; | |
3458 | } | |
8359cf43 | 3459 | memcpy(payload + payload_len, buf, len); |
e48354ce NB |
3460 | payload_len += len; |
3461 | } | |
3462 | spin_unlock(&tpg->tpg_np_lock); | |
3463 | } | |
3464 | spin_unlock(&tiqn->tiqn_tpg_lock); | |
3465 | eob: | |
3466 | if (end_of_buf) | |
3467 | break; | |
6665889c NB |
3468 | |
3469 | if (cmd->cmd_flags & IFC_SENDTARGETS_SINGLE) | |
3470 | break; | |
e48354ce NB |
3471 | } |
3472 | spin_unlock(&tiqn_lock); | |
3473 | ||
3474 | cmd->buf_ptr = payload; | |
3475 | ||
3476 | return payload_len; | |
3477 | } | |
3478 | ||
889c8a68 NB |
3479 | int |
3480 | iscsit_build_text_rsp(struct iscsi_cmd *cmd, struct iscsi_conn *conn, | |
3481 | struct iscsi_text_rsp *hdr) | |
e48354ce | 3482 | { |
889c8a68 | 3483 | int text_length, padding; |
e48354ce NB |
3484 | |
3485 | text_length = iscsit_build_sendtargets_response(cmd); | |
3486 | if (text_length < 0) | |
3487 | return text_length; | |
3488 | ||
889c8a68 NB |
3489 | hdr->opcode = ISCSI_OP_TEXT_RSP; |
3490 | hdr->flags |= ISCSI_FLAG_CMD_FINAL; | |
e48354ce | 3491 | padding = ((-text_length) & 3); |
e48354ce | 3492 | hton24(hdr->dlength, text_length); |
889c8a68 NB |
3493 | hdr->itt = cmd->init_task_tag; |
3494 | hdr->ttt = cpu_to_be32(cmd->targ_xfer_tag); | |
3495 | cmd->stat_sn = conn->stat_sn++; | |
3496 | hdr->statsn = cpu_to_be32(cmd->stat_sn); | |
e48354ce NB |
3497 | |
3498 | iscsit_increment_maxcmdsn(cmd, conn->sess); | |
889c8a68 NB |
3499 | hdr->exp_cmdsn = cpu_to_be32(conn->sess->exp_cmd_sn); |
3500 | hdr->max_cmdsn = cpu_to_be32(conn->sess->max_cmd_sn); | |
e48354ce | 3501 | |
889c8a68 NB |
3502 | pr_debug("Built Text Response: ITT: 0x%08x, StatSN: 0x%08x," |
3503 | " Length: %u, CID: %hu\n", cmd->init_task_tag, cmd->stat_sn, | |
3504 | text_length, conn->cid); | |
3505 | ||
3506 | return text_length + padding; | |
3507 | } | |
3508 | EXPORT_SYMBOL(iscsit_build_text_rsp); | |
e48354ce | 3509 | |
889c8a68 NB |
3510 | /* |
3511 | * FIXME: Add support for F_BIT and C_BIT when the length is longer than | |
3512 | * MaxRecvDataSegmentLength. | |
3513 | */ | |
3514 | static int iscsit_send_text_rsp( | |
3515 | struct iscsi_cmd *cmd, | |
3516 | struct iscsi_conn *conn) | |
3517 | { | |
3518 | struct iscsi_text_rsp *hdr = (struct iscsi_text_rsp *)cmd->pdu; | |
3519 | struct kvec *iov; | |
3520 | u32 tx_size = 0; | |
3521 | int text_length, iov_count = 0, rc; | |
3522 | ||
3523 | rc = iscsit_build_text_rsp(cmd, conn, hdr); | |
3524 | if (rc < 0) | |
3525 | return rc; | |
3526 | ||
3527 | text_length = rc; | |
3528 | iov = &cmd->iov_misc[0]; | |
e48354ce NB |
3529 | iov[iov_count].iov_base = cmd->pdu; |
3530 | iov[iov_count++].iov_len = ISCSI_HDR_LEN; | |
3531 | iov[iov_count].iov_base = cmd->buf_ptr; | |
889c8a68 | 3532 | iov[iov_count++].iov_len = text_length; |
e48354ce | 3533 | |
889c8a68 | 3534 | tx_size += (ISCSI_HDR_LEN + text_length); |
e48354ce NB |
3535 | |
3536 | if (conn->conn_ops->HeaderDigest) { | |
3537 | u32 *header_digest = (u32 *)&cmd->pdu[ISCSI_HDR_LEN]; | |
3538 | ||
80690fdb GU |
3539 | iscsit_do_crypto_hash_buf(&conn->conn_tx_hash, hdr, |
3540 | ISCSI_HDR_LEN, 0, NULL, (u8 *)header_digest); | |
e48354ce NB |
3541 | |
3542 | iov[0].iov_len += ISCSI_CRC_LEN; | |
3543 | tx_size += ISCSI_CRC_LEN; | |
3544 | pr_debug("Attaching CRC32 HeaderDigest for" | |
3545 | " Text Response PDU 0x%08x\n", *header_digest); | |
3546 | } | |
3547 | ||
3548 | if (conn->conn_ops->DataDigest) { | |
3549 | iscsit_do_crypto_hash_buf(&conn->conn_tx_hash, | |
889c8a68 | 3550 | cmd->buf_ptr, text_length, |
e48354ce NB |
3551 | 0, NULL, (u8 *)&cmd->data_crc); |
3552 | ||
3553 | iov[iov_count].iov_base = &cmd->data_crc; | |
3554 | iov[iov_count++].iov_len = ISCSI_CRC_LEN; | |
3555 | tx_size += ISCSI_CRC_LEN; | |
3556 | ||
3557 | pr_debug("Attaching DataDigest for %u bytes of text" | |
889c8a68 | 3558 | " data, CRC 0x%08x\n", text_length, |
e48354ce NB |
3559 | cmd->data_crc); |
3560 | } | |
3561 | ||
3562 | cmd->iov_misc_count = iov_count; | |
3563 | cmd->tx_size = tx_size; | |
3564 | ||
e48354ce NB |
3565 | return 0; |
3566 | } | |
3567 | ||
2ec5a8c1 NB |
3568 | void |
3569 | iscsit_build_reject(struct iscsi_cmd *cmd, struct iscsi_conn *conn, | |
3570 | struct iscsi_reject *hdr) | |
3571 | { | |
3572 | hdr->opcode = ISCSI_OP_REJECT; | |
ba159914 | 3573 | hdr->reason = cmd->reject_reason; |
2ec5a8c1 NB |
3574 | hdr->flags |= ISCSI_FLAG_CMD_FINAL; |
3575 | hton24(hdr->dlength, ISCSI_HDR_LEN); | |
3576 | hdr->ffffffff = cpu_to_be32(0xffffffff); | |
3577 | cmd->stat_sn = conn->stat_sn++; | |
3578 | hdr->statsn = cpu_to_be32(cmd->stat_sn); | |
3579 | hdr->exp_cmdsn = cpu_to_be32(conn->sess->exp_cmd_sn); | |
3580 | hdr->max_cmdsn = cpu_to_be32(conn->sess->max_cmd_sn); | |
3581 | ||
3582 | } | |
3583 | EXPORT_SYMBOL(iscsit_build_reject); | |
3584 | ||
e48354ce NB |
3585 | static int iscsit_send_reject( |
3586 | struct iscsi_cmd *cmd, | |
3587 | struct iscsi_conn *conn) | |
3588 | { | |
bfbdb31d | 3589 | struct iscsi_reject *hdr = (struct iscsi_reject *)&cmd->pdu[0]; |
e48354ce | 3590 | struct kvec *iov; |
bfbdb31d | 3591 | u32 iov_count = 0, tx_size; |
e48354ce | 3592 | |
bfbdb31d | 3593 | iscsit_build_reject(cmd, conn, hdr); |
e48354ce NB |
3594 | |
3595 | iov = &cmd->iov_misc[0]; | |
e48354ce NB |
3596 | iov[iov_count].iov_base = cmd->pdu; |
3597 | iov[iov_count++].iov_len = ISCSI_HDR_LEN; | |
3598 | iov[iov_count].iov_base = cmd->buf_ptr; | |
3599 | iov[iov_count++].iov_len = ISCSI_HDR_LEN; | |
3600 | ||
3601 | tx_size = (ISCSI_HDR_LEN + ISCSI_HDR_LEN); | |
3602 | ||
3603 | if (conn->conn_ops->HeaderDigest) { | |
3604 | u32 *header_digest = (u32 *)&cmd->pdu[ISCSI_HDR_LEN]; | |
3605 | ||
80690fdb GU |
3606 | iscsit_do_crypto_hash_buf(&conn->conn_tx_hash, hdr, |
3607 | ISCSI_HDR_LEN, 0, NULL, (u8 *)header_digest); | |
e48354ce NB |
3608 | |
3609 | iov[0].iov_len += ISCSI_CRC_LEN; | |
3610 | tx_size += ISCSI_CRC_LEN; | |
3611 | pr_debug("Attaching CRC32 HeaderDigest for" | |
3612 | " REJECT PDU 0x%08x\n", *header_digest); | |
3613 | } | |
3614 | ||
3615 | if (conn->conn_ops->DataDigest) { | |
80690fdb GU |
3616 | iscsit_do_crypto_hash_buf(&conn->conn_tx_hash, cmd->buf_ptr, |
3617 | ISCSI_HDR_LEN, 0, NULL, (u8 *)&cmd->data_crc); | |
e48354ce NB |
3618 | |
3619 | iov[iov_count].iov_base = &cmd->data_crc; | |
3620 | iov[iov_count++].iov_len = ISCSI_CRC_LEN; | |
3621 | tx_size += ISCSI_CRC_LEN; | |
3622 | pr_debug("Attaching CRC32 DataDigest for REJECT" | |
3623 | " PDU 0x%08x\n", cmd->data_crc); | |
3624 | } | |
3625 | ||
3626 | cmd->iov_misc_count = iov_count; | |
3627 | cmd->tx_size = tx_size; | |
3628 | ||
3629 | pr_debug("Built Reject PDU StatSN: 0x%08x, Reason: 0x%02x," | |
3630 | " CID: %hu\n", ntohl(hdr->statsn), hdr->reason, conn->cid); | |
3631 | ||
3632 | return 0; | |
3633 | } | |
3634 | ||
e48354ce NB |
3635 | void iscsit_thread_get_cpumask(struct iscsi_conn *conn) |
3636 | { | |
3637 | struct iscsi_thread_set *ts = conn->thread_set; | |
3638 | int ord, cpu; | |
3639 | /* | |
3640 | * thread_id is assigned from iscsit_global->ts_bitmap from | |
3641 | * within iscsi_thread_set.c:iscsi_allocate_thread_sets() | |
3642 | * | |
3643 | * Here we use thread_id to determine which CPU that this | |
3644 | * iSCSI connection's iscsi_thread_set will be scheduled to | |
3645 | * execute upon. | |
3646 | */ | |
3647 | ord = ts->thread_id % cpumask_weight(cpu_online_mask); | |
e48354ce NB |
3648 | for_each_online_cpu(cpu) { |
3649 | if (ord-- == 0) { | |
3650 | cpumask_set_cpu(cpu, conn->conn_cpumask); | |
3651 | return; | |
3652 | } | |
3653 | } | |
3654 | /* | |
3655 | * This should never be reached.. | |
3656 | */ | |
3657 | dump_stack(); | |
3658 | cpumask_setall(conn->conn_cpumask); | |
3659 | } | |
3660 | ||
3661 | static inline void iscsit_thread_check_cpumask( | |
3662 | struct iscsi_conn *conn, | |
3663 | struct task_struct *p, | |
3664 | int mode) | |
3665 | { | |
3666 | char buf[128]; | |
3667 | /* | |
3668 | * mode == 1 signals iscsi_target_tx_thread() usage. | |
3669 | * mode == 0 signals iscsi_target_rx_thread() usage. | |
3670 | */ | |
3671 | if (mode == 1) { | |
3672 | if (!conn->conn_tx_reset_cpumask) | |
3673 | return; | |
3674 | conn->conn_tx_reset_cpumask = 0; | |
3675 | } else { | |
3676 | if (!conn->conn_rx_reset_cpumask) | |
3677 | return; | |
3678 | conn->conn_rx_reset_cpumask = 0; | |
3679 | } | |
3680 | /* | |
3681 | * Update the CPU mask for this single kthread so that | |
3682 | * both TX and RX kthreads are scheduled to run on the | |
3683 | * same CPU. | |
3684 | */ | |
3685 | memset(buf, 0, 128); | |
3686 | cpumask_scnprintf(buf, 128, conn->conn_cpumask); | |
e48354ce NB |
3687 | set_cpus_allowed_ptr(p, conn->conn_cpumask); |
3688 | } | |
3689 | ||
2ec5a8c1 NB |
3690 | static int |
3691 | iscsit_immediate_queue(struct iscsi_conn *conn, struct iscsi_cmd *cmd, int state) | |
e48354ce | 3692 | { |
6f3c0e69 AG |
3693 | int ret; |
3694 | ||
2ec5a8c1 NB |
3695 | switch (state) { |
3696 | case ISTATE_SEND_R2T: | |
3697 | ret = iscsit_send_r2t(cmd, conn); | |
3698 | if (ret < 0) | |
3699 | goto err; | |
3700 | break; | |
3701 | case ISTATE_REMOVE: | |
3702 | spin_lock_bh(&conn->cmd_lock); | |
3703 | list_del(&cmd->i_conn_node); | |
3704 | spin_unlock_bh(&conn->cmd_lock); | |
6f3c0e69 | 3705 | |
aafc9d15 | 3706 | iscsit_free_cmd(cmd, false); |
2ec5a8c1 NB |
3707 | break; |
3708 | case ISTATE_SEND_NOPIN_WANT_RESPONSE: | |
3709 | iscsit_mod_nopin_response_timer(conn); | |
3710 | ret = iscsit_send_unsolicited_nopin(cmd, conn, 1); | |
3711 | if (ret < 0) | |
6f3c0e69 | 3712 | goto err; |
2ec5a8c1 NB |
3713 | break; |
3714 | case ISTATE_SEND_NOPIN_NO_RESPONSE: | |
3715 | ret = iscsit_send_unsolicited_nopin(cmd, conn, 0); | |
3716 | if (ret < 0) | |
3717 | goto err; | |
3718 | break; | |
3719 | default: | |
3720 | pr_err("Unknown Opcode: 0x%02x ITT:" | |
3721 | " 0x%08x, i_state: %d on CID: %hu\n", | |
3722 | cmd->iscsi_opcode, cmd->init_task_tag, state, | |
3723 | conn->cid); | |
3724 | goto err; | |
6f3c0e69 AG |
3725 | } |
3726 | ||
3727 | return 0; | |
3728 | ||
3729 | err: | |
3730 | return -1; | |
3731 | } | |
3732 | ||
2ec5a8c1 NB |
3733 | static int |
3734 | iscsit_handle_immediate_queue(struct iscsi_conn *conn) | |
6f3c0e69 | 3735 | { |
2ec5a8c1 | 3736 | struct iscsit_transport *t = conn->conn_transport; |
6f3c0e69 AG |
3737 | struct iscsi_queue_req *qr; |
3738 | struct iscsi_cmd *cmd; | |
3739 | u8 state; | |
3740 | int ret; | |
3741 | ||
2ec5a8c1 NB |
3742 | while ((qr = iscsit_get_cmd_from_immediate_queue(conn))) { |
3743 | atomic_set(&conn->check_immediate_queue, 0); | |
6f3c0e69 AG |
3744 | cmd = qr->cmd; |
3745 | state = qr->state; | |
3746 | kmem_cache_free(lio_qr_cache, qr); | |
3747 | ||
2ec5a8c1 NB |
3748 | ret = t->iscsit_immediate_queue(conn, cmd, state); |
3749 | if (ret < 0) | |
3750 | return ret; | |
3751 | } | |
fd3a9025 | 3752 | |
2ec5a8c1 NB |
3753 | return 0; |
3754 | } | |
6f3c0e69 | 3755 | |
2ec5a8c1 NB |
3756 | static int |
3757 | iscsit_response_queue(struct iscsi_conn *conn, struct iscsi_cmd *cmd, int state) | |
3758 | { | |
3759 | int ret; | |
3760 | ||
3761 | check_rsp_state: | |
3762 | switch (state) { | |
3763 | case ISTATE_SEND_DATAIN: | |
3764 | ret = iscsit_send_datain(cmd, conn); | |
6f3c0e69 AG |
3765 | if (ret < 0) |
3766 | goto err; | |
2ec5a8c1 NB |
3767 | else if (!ret) |
3768 | /* more drs */ | |
3769 | goto check_rsp_state; | |
3770 | else if (ret == 1) { | |
3771 | /* all done */ | |
3772 | spin_lock_bh(&cmd->istate_lock); | |
3773 | cmd->i_state = ISTATE_SENT_STATUS; | |
3774 | spin_unlock_bh(&cmd->istate_lock); | |
6f3c0e69 | 3775 | |
2ec5a8c1 NB |
3776 | if (atomic_read(&conn->check_immediate_queue)) |
3777 | return 1; | |
6f3c0e69 | 3778 | |
2ec5a8c1 NB |
3779 | return 0; |
3780 | } else if (ret == 2) { | |
3781 | /* Still must send status, | |
3782 | SCF_TRANSPORT_TASK_SENSE was set */ | |
6f3c0e69 | 3783 | spin_lock_bh(&cmd->istate_lock); |
2ec5a8c1 | 3784 | cmd->i_state = ISTATE_SEND_STATUS; |
6f3c0e69 | 3785 | spin_unlock_bh(&cmd->istate_lock); |
2ec5a8c1 NB |
3786 | state = ISTATE_SEND_STATUS; |
3787 | goto check_rsp_state; | |
3788 | } | |
3789 | ||
3790 | break; | |
3791 | case ISTATE_SEND_STATUS: | |
3792 | case ISTATE_SEND_STATUS_RECOVERY: | |
3793 | ret = iscsit_send_response(cmd, conn); | |
3794 | break; | |
3795 | case ISTATE_SEND_LOGOUTRSP: | |
3796 | ret = iscsit_send_logout(cmd, conn); | |
3797 | break; | |
3798 | case ISTATE_SEND_ASYNCMSG: | |
3799 | ret = iscsit_send_conn_drop_async_message( | |
3800 | cmd, conn); | |
3801 | break; | |
3802 | case ISTATE_SEND_NOPIN: | |
3803 | ret = iscsit_send_nopin(cmd, conn); | |
3804 | break; | |
3805 | case ISTATE_SEND_REJECT: | |
3806 | ret = iscsit_send_reject(cmd, conn); | |
3807 | break; | |
3808 | case ISTATE_SEND_TASKMGTRSP: | |
3809 | ret = iscsit_send_task_mgt_rsp(cmd, conn); | |
3810 | if (ret != 0) | |
6f3c0e69 | 3811 | break; |
2ec5a8c1 NB |
3812 | ret = iscsit_tmr_post_handler(cmd, conn); |
3813 | if (ret != 0) | |
3814 | iscsit_fall_back_to_erl0(conn->sess); | |
3815 | break; | |
3816 | case ISTATE_SEND_TEXTRSP: | |
3817 | ret = iscsit_send_text_rsp(cmd, conn); | |
3818 | break; | |
3819 | default: | |
3820 | pr_err("Unknown Opcode: 0x%02x ITT:" | |
3821 | " 0x%08x, i_state: %d on CID: %hu\n", | |
3822 | cmd->iscsi_opcode, cmd->init_task_tag, | |
3823 | state, conn->cid); | |
3824 | goto err; | |
3825 | } | |
3826 | if (ret < 0) | |
3827 | goto err; | |
3828 | ||
3829 | if (iscsit_send_tx_data(cmd, conn, 1) < 0) { | |
3830 | iscsit_tx_thread_wait_for_tcp(conn); | |
3831 | iscsit_unmap_iovec(cmd); | |
3832 | goto err; | |
3833 | } | |
3834 | iscsit_unmap_iovec(cmd); | |
3835 | ||
3836 | switch (state) { | |
3837 | case ISTATE_SEND_LOGOUTRSP: | |
3838 | if (!iscsit_logout_post_handler(cmd, conn)) | |
3839 | goto restart; | |
3840 | /* fall through */ | |
3841 | case ISTATE_SEND_STATUS: | |
3842 | case ISTATE_SEND_ASYNCMSG: | |
3843 | case ISTATE_SEND_NOPIN: | |
3844 | case ISTATE_SEND_STATUS_RECOVERY: | |
3845 | case ISTATE_SEND_TEXTRSP: | |
3846 | case ISTATE_SEND_TASKMGTRSP: | |
ba159914 | 3847 | case ISTATE_SEND_REJECT: |
2ec5a8c1 NB |
3848 | spin_lock_bh(&cmd->istate_lock); |
3849 | cmd->i_state = ISTATE_SENT_STATUS; | |
3850 | spin_unlock_bh(&cmd->istate_lock); | |
3851 | break; | |
2ec5a8c1 NB |
3852 | default: |
3853 | pr_err("Unknown Opcode: 0x%02x ITT:" | |
3854 | " 0x%08x, i_state: %d on CID: %hu\n", | |
3855 | cmd->iscsi_opcode, cmd->init_task_tag, | |
3856 | cmd->i_state, conn->cid); | |
3857 | goto err; | |
6f3c0e69 AG |
3858 | } |
3859 | ||
2ec5a8c1 NB |
3860 | if (atomic_read(&conn->check_immediate_queue)) |
3861 | return 1; | |
3862 | ||
6f3c0e69 AG |
3863 | return 0; |
3864 | ||
3865 | err: | |
3866 | return -1; | |
3867 | restart: | |
3868 | return -EAGAIN; | |
3869 | } | |
3870 | ||
2ec5a8c1 NB |
3871 | static int iscsit_handle_response_queue(struct iscsi_conn *conn) |
3872 | { | |
3873 | struct iscsit_transport *t = conn->conn_transport; | |
3874 | struct iscsi_queue_req *qr; | |
3875 | struct iscsi_cmd *cmd; | |
3876 | u8 state; | |
3877 | int ret; | |
3878 | ||
3879 | while ((qr = iscsit_get_cmd_from_response_queue(conn))) { | |
3880 | cmd = qr->cmd; | |
3881 | state = qr->state; | |
3882 | kmem_cache_free(lio_qr_cache, qr); | |
3883 | ||
3884 | ret = t->iscsit_response_queue(conn, cmd, state); | |
3885 | if (ret == 1 || ret < 0) | |
3886 | return ret; | |
3887 | } | |
3888 | ||
3889 | return 0; | |
3890 | } | |
3891 | ||
6f3c0e69 AG |
3892 | int iscsi_target_tx_thread(void *arg) |
3893 | { | |
e48354ce | 3894 | int ret = 0; |
e48354ce | 3895 | struct iscsi_conn *conn; |
8359cf43 | 3896 | struct iscsi_thread_set *ts = arg; |
e48354ce NB |
3897 | /* |
3898 | * Allow ourselves to be interrupted by SIGINT so that a | |
3899 | * connection recovery / failure event can be triggered externally. | |
3900 | */ | |
3901 | allow_signal(SIGINT); | |
3902 | ||
3903 | restart: | |
3904 | conn = iscsi_tx_thread_pre_handler(ts); | |
3905 | if (!conn) | |
3906 | goto out; | |
3907 | ||
6f3c0e69 | 3908 | ret = 0; |
e48354ce NB |
3909 | |
3910 | while (!kthread_should_stop()) { | |
3911 | /* | |
3912 | * Ensure that both TX and RX per connection kthreads | |
3913 | * are scheduled to run on the same CPU. | |
3914 | */ | |
3915 | iscsit_thread_check_cpumask(conn, current, 1); | |
3916 | ||
d5627acb RD |
3917 | wait_event_interruptible(conn->queues_wq, |
3918 | !iscsit_conn_all_queues_empty(conn) || | |
3919 | ts->status == ISCSI_THREAD_SET_RESET); | |
e48354ce NB |
3920 | |
3921 | if ((ts->status == ISCSI_THREAD_SET_RESET) || | |
3922 | signal_pending(current)) | |
3923 | goto transport_err; | |
3924 | ||
fd3a9025 | 3925 | get_immediate: |
2ec5a8c1 | 3926 | ret = iscsit_handle_immediate_queue(conn); |
6f3c0e69 AG |
3927 | if (ret < 0) |
3928 | goto transport_err; | |
e48354ce | 3929 | |
2ec5a8c1 | 3930 | ret = iscsit_handle_response_queue(conn); |
fd3a9025 NB |
3931 | if (ret == 1) |
3932 | goto get_immediate; | |
3933 | else if (ret == -EAGAIN) | |
6f3c0e69 AG |
3934 | goto restart; |
3935 | else if (ret < 0) | |
3936 | goto transport_err; | |
e48354ce NB |
3937 | } |
3938 | ||
3939 | transport_err: | |
3940 | iscsit_take_action_for_connection_exit(conn); | |
3941 | goto restart; | |
3942 | out: | |
3943 | return 0; | |
3944 | } | |
3945 | ||
3e1c81a9 NB |
3946 | static int iscsi_target_rx_opcode(struct iscsi_conn *conn, unsigned char *buf) |
3947 | { | |
3948 | struct iscsi_hdr *hdr = (struct iscsi_hdr *)buf; | |
3949 | struct iscsi_cmd *cmd; | |
3950 | int ret = 0; | |
3951 | ||
3952 | switch (hdr->opcode & ISCSI_OPCODE_MASK) { | |
3953 | case ISCSI_OP_SCSI_CMD: | |
3954 | cmd = iscsit_allocate_cmd(conn, GFP_KERNEL); | |
3955 | if (!cmd) | |
ba159914 | 3956 | goto reject; |
3e1c81a9 NB |
3957 | |
3958 | ret = iscsit_handle_scsi_cmd(conn, cmd, buf); | |
3959 | break; | |
3960 | case ISCSI_OP_SCSI_DATA_OUT: | |
3961 | ret = iscsit_handle_data_out(conn, buf); | |
3962 | break; | |
3963 | case ISCSI_OP_NOOP_OUT: | |
3964 | cmd = NULL; | |
3965 | if (hdr->ttt == cpu_to_be32(0xFFFFFFFF)) { | |
3966 | cmd = iscsit_allocate_cmd(conn, GFP_KERNEL); | |
3967 | if (!cmd) | |
ba159914 | 3968 | goto reject; |
3e1c81a9 NB |
3969 | } |
3970 | ret = iscsit_handle_nop_out(conn, cmd, buf); | |
3971 | break; | |
3972 | case ISCSI_OP_SCSI_TMFUNC: | |
3973 | cmd = iscsit_allocate_cmd(conn, GFP_KERNEL); | |
3974 | if (!cmd) | |
ba159914 | 3975 | goto reject; |
3e1c81a9 NB |
3976 | |
3977 | ret = iscsit_handle_task_mgt_cmd(conn, cmd, buf); | |
3978 | break; | |
3979 | case ISCSI_OP_TEXT: | |
64534aa7 NB |
3980 | cmd = iscsit_allocate_cmd(conn, GFP_KERNEL); |
3981 | if (!cmd) | |
ba159914 | 3982 | goto reject; |
64534aa7 NB |
3983 | |
3984 | ret = iscsit_handle_text_cmd(conn, cmd, buf); | |
3e1c81a9 NB |
3985 | break; |
3986 | case ISCSI_OP_LOGOUT: | |
3987 | cmd = iscsit_allocate_cmd(conn, GFP_KERNEL); | |
3988 | if (!cmd) | |
ba159914 | 3989 | goto reject; |
3e1c81a9 NB |
3990 | |
3991 | ret = iscsit_handle_logout_cmd(conn, cmd, buf); | |
3992 | if (ret > 0) | |
3993 | wait_for_completion_timeout(&conn->conn_logout_comp, | |
3994 | SECONDS_FOR_LOGOUT_COMP * HZ); | |
3995 | break; | |
3996 | case ISCSI_OP_SNACK: | |
3997 | ret = iscsit_handle_snack(conn, buf); | |
3998 | break; | |
3999 | default: | |
4000 | pr_err("Got unknown iSCSI OpCode: 0x%02x\n", hdr->opcode); | |
4001 | if (!conn->sess->sess_ops->ErrorRecoveryLevel) { | |
4002 | pr_err("Cannot recover from unknown" | |
4003 | " opcode while ERL=0, closing iSCSI connection.\n"); | |
4004 | return -1; | |
4005 | } | |
4006 | if (!conn->conn_ops->OFMarker) { | |
4007 | pr_err("Unable to recover from unknown" | |
4008 | " opcode while OFMarker=No, closing iSCSI" | |
4009 | " connection.\n"); | |
4010 | return -1; | |
4011 | } | |
4012 | if (iscsit_recover_from_unknown_opcode(conn) < 0) { | |
4013 | pr_err("Unable to recover from unknown" | |
4014 | " opcode, closing iSCSI connection.\n"); | |
4015 | return -1; | |
4016 | } | |
4017 | break; | |
4018 | } | |
4019 | ||
4020 | return ret; | |
ba159914 NB |
4021 | reject: |
4022 | return iscsit_add_reject(conn, ISCSI_REASON_BOOKMARK_NO_RESOURCES, buf); | |
3e1c81a9 NB |
4023 | } |
4024 | ||
e48354ce NB |
4025 | int iscsi_target_rx_thread(void *arg) |
4026 | { | |
4027 | int ret; | |
4028 | u8 buffer[ISCSI_HDR_LEN], opcode; | |
4029 | u32 checksum = 0, digest = 0; | |
4030 | struct iscsi_conn *conn = NULL; | |
8359cf43 | 4031 | struct iscsi_thread_set *ts = arg; |
e48354ce NB |
4032 | struct kvec iov; |
4033 | /* | |
4034 | * Allow ourselves to be interrupted by SIGINT so that a | |
4035 | * connection recovery / failure event can be triggered externally. | |
4036 | */ | |
4037 | allow_signal(SIGINT); | |
4038 | ||
4039 | restart: | |
4040 | conn = iscsi_rx_thread_pre_handler(ts); | |
4041 | if (!conn) | |
4042 | goto out; | |
4043 | ||
3e1c81a9 NB |
4044 | if (conn->conn_transport->transport_type == ISCSI_INFINIBAND) { |
4045 | struct completion comp; | |
4046 | int rc; | |
4047 | ||
4048 | init_completion(&comp); | |
4049 | rc = wait_for_completion_interruptible(&comp); | |
4050 | if (rc < 0) | |
4051 | goto transport_err; | |
4052 | ||
4053 | goto out; | |
4054 | } | |
4055 | ||
e48354ce NB |
4056 | while (!kthread_should_stop()) { |
4057 | /* | |
4058 | * Ensure that both TX and RX per connection kthreads | |
4059 | * are scheduled to run on the same CPU. | |
4060 | */ | |
4061 | iscsit_thread_check_cpumask(conn, current, 0); | |
4062 | ||
4063 | memset(buffer, 0, ISCSI_HDR_LEN); | |
4064 | memset(&iov, 0, sizeof(struct kvec)); | |
4065 | ||
4066 | iov.iov_base = buffer; | |
4067 | iov.iov_len = ISCSI_HDR_LEN; | |
4068 | ||
4069 | ret = rx_data(conn, &iov, 1, ISCSI_HDR_LEN); | |
4070 | if (ret != ISCSI_HDR_LEN) { | |
4071 | iscsit_rx_thread_wait_for_tcp(conn); | |
4072 | goto transport_err; | |
4073 | } | |
4074 | ||
e48354ce NB |
4075 | if (conn->conn_ops->HeaderDigest) { |
4076 | iov.iov_base = &digest; | |
4077 | iov.iov_len = ISCSI_CRC_LEN; | |
4078 | ||
4079 | ret = rx_data(conn, &iov, 1, ISCSI_CRC_LEN); | |
4080 | if (ret != ISCSI_CRC_LEN) { | |
4081 | iscsit_rx_thread_wait_for_tcp(conn); | |
4082 | goto transport_err; | |
4083 | } | |
4084 | ||
4085 | iscsit_do_crypto_hash_buf(&conn->conn_rx_hash, | |
4086 | buffer, ISCSI_HDR_LEN, | |
4087 | 0, NULL, (u8 *)&checksum); | |
4088 | ||
4089 | if (digest != checksum) { | |
4090 | pr_err("HeaderDigest CRC32C failed," | |
4091 | " received 0x%08x, computed 0x%08x\n", | |
4092 | digest, checksum); | |
4093 | /* | |
4094 | * Set the PDU to 0xff so it will intentionally | |
4095 | * hit default in the switch below. | |
4096 | */ | |
4097 | memset(buffer, 0xff, ISCSI_HDR_LEN); | |
04f3b31b | 4098 | atomic_long_inc(&conn->sess->conn_digest_errors); |
e48354ce NB |
4099 | } else { |
4100 | pr_debug("Got HeaderDigest CRC32C" | |
4101 | " 0x%08x\n", checksum); | |
4102 | } | |
4103 | } | |
4104 | ||
4105 | if (conn->conn_state == TARG_CONN_STATE_IN_LOGOUT) | |
4106 | goto transport_err; | |
4107 | ||
4108 | opcode = buffer[0] & ISCSI_OPCODE_MASK; | |
4109 | ||
4110 | if (conn->sess->sess_ops->SessionType && | |
4111 | ((!(opcode & ISCSI_OP_TEXT)) || | |
4112 | (!(opcode & ISCSI_OP_LOGOUT)))) { | |
4113 | pr_err("Received illegal iSCSI Opcode: 0x%02x" | |
4114 | " while in Discovery Session, rejecting.\n", opcode); | |
ba159914 NB |
4115 | iscsit_add_reject(conn, ISCSI_REASON_PROTOCOL_ERROR, |
4116 | buffer); | |
e48354ce NB |
4117 | goto transport_err; |
4118 | } | |
4119 | ||
3e1c81a9 NB |
4120 | ret = iscsi_target_rx_opcode(conn, buffer); |
4121 | if (ret < 0) | |
4122 | goto transport_err; | |
e48354ce NB |
4123 | } |
4124 | ||
4125 | transport_err: | |
4126 | if (!signal_pending(current)) | |
4127 | atomic_set(&conn->transport_failed, 1); | |
4128 | iscsit_take_action_for_connection_exit(conn); | |
4129 | goto restart; | |
4130 | out: | |
4131 | return 0; | |
4132 | } | |
4133 | ||
4134 | static void iscsit_release_commands_from_conn(struct iscsi_conn *conn) | |
4135 | { | |
4136 | struct iscsi_cmd *cmd = NULL, *cmd_tmp = NULL; | |
4137 | struct iscsi_session *sess = conn->sess; | |
e48354ce NB |
4138 | /* |
4139 | * We expect this function to only ever be called from either RX or TX | |
4140 | * thread context via iscsit_close_connection() once the other context | |
4141 | * has been reset -> returned sleeping pre-handler state. | |
4142 | */ | |
4143 | spin_lock_bh(&conn->cmd_lock); | |
2fbb471e | 4144 | list_for_each_entry_safe(cmd, cmd_tmp, &conn->conn_cmd_list, i_conn_node) { |
e48354ce | 4145 | |
2fbb471e | 4146 | list_del(&cmd->i_conn_node); |
e48354ce NB |
4147 | spin_unlock_bh(&conn->cmd_lock); |
4148 | ||
4149 | iscsit_increment_maxcmdsn(cmd, sess); | |
e48354ce | 4150 | |
aafc9d15 | 4151 | iscsit_free_cmd(cmd, true); |
e48354ce NB |
4152 | |
4153 | spin_lock_bh(&conn->cmd_lock); | |
4154 | } | |
4155 | spin_unlock_bh(&conn->cmd_lock); | |
4156 | } | |
4157 | ||
4158 | static void iscsit_stop_timers_for_cmds( | |
4159 | struct iscsi_conn *conn) | |
4160 | { | |
4161 | struct iscsi_cmd *cmd; | |
4162 | ||
4163 | spin_lock_bh(&conn->cmd_lock); | |
2fbb471e | 4164 | list_for_each_entry(cmd, &conn->conn_cmd_list, i_conn_node) { |
e48354ce NB |
4165 | if (cmd->data_direction == DMA_TO_DEVICE) |
4166 | iscsit_stop_dataout_timer(cmd); | |
4167 | } | |
4168 | spin_unlock_bh(&conn->cmd_lock); | |
4169 | } | |
4170 | ||
4171 | int iscsit_close_connection( | |
4172 | struct iscsi_conn *conn) | |
4173 | { | |
4174 | int conn_logout = (conn->conn_state == TARG_CONN_STATE_IN_LOGOUT); | |
4175 | struct iscsi_session *sess = conn->sess; | |
4176 | ||
4177 | pr_debug("Closing iSCSI connection CID %hu on SID:" | |
4178 | " %u\n", conn->cid, sess->sid); | |
4179 | /* | |
4180 | * Always up conn_logout_comp just in case the RX Thread is sleeping | |
4181 | * and the logout response never got sent because the connection | |
4182 | * failed. | |
4183 | */ | |
4184 | complete(&conn->conn_logout_comp); | |
4185 | ||
4186 | iscsi_release_thread_set(conn); | |
4187 | ||
4188 | iscsit_stop_timers_for_cmds(conn); | |
4189 | iscsit_stop_nopin_response_timer(conn); | |
4190 | iscsit_stop_nopin_timer(conn); | |
4191 | iscsit_free_queue_reqs_for_conn(conn); | |
4192 | ||
4193 | /* | |
4194 | * During Connection recovery drop unacknowledged out of order | |
4195 | * commands for this connection, and prepare the other commands | |
4196 | * for realligence. | |
4197 | * | |
4198 | * During normal operation clear the out of order commands (but | |
4199 | * do not free the struct iscsi_ooo_cmdsn's) and release all | |
4200 | * struct iscsi_cmds. | |
4201 | */ | |
4202 | if (atomic_read(&conn->connection_recovery)) { | |
4203 | iscsit_discard_unacknowledged_ooo_cmdsns_for_conn(conn); | |
4204 | iscsit_prepare_cmds_for_realligance(conn); | |
4205 | } else { | |
4206 | iscsit_clear_ooo_cmdsns_for_conn(conn); | |
4207 | iscsit_release_commands_from_conn(conn); | |
4208 | } | |
4209 | ||
4210 | /* | |
4211 | * Handle decrementing session or connection usage count if | |
4212 | * a logout response was not able to be sent because the | |
4213 | * connection failed. Fall back to Session Recovery here. | |
4214 | */ | |
4215 | if (atomic_read(&conn->conn_logout_remove)) { | |
4216 | if (conn->conn_logout_reason == ISCSI_LOGOUT_REASON_CLOSE_SESSION) { | |
4217 | iscsit_dec_conn_usage_count(conn); | |
4218 | iscsit_dec_session_usage_count(sess); | |
4219 | } | |
4220 | if (conn->conn_logout_reason == ISCSI_LOGOUT_REASON_CLOSE_CONNECTION) | |
4221 | iscsit_dec_conn_usage_count(conn); | |
4222 | ||
4223 | atomic_set(&conn->conn_logout_remove, 0); | |
4224 | atomic_set(&sess->session_reinstatement, 0); | |
4225 | atomic_set(&sess->session_fall_back_to_erl0, 1); | |
4226 | } | |
4227 | ||
4228 | spin_lock_bh(&sess->conn_lock); | |
4229 | list_del(&conn->conn_list); | |
4230 | ||
4231 | /* | |
4232 | * Attempt to let the Initiator know this connection failed by | |
4233 | * sending an Connection Dropped Async Message on another | |
4234 | * active connection. | |
4235 | */ | |
4236 | if (atomic_read(&conn->connection_recovery)) | |
4237 | iscsit_build_conn_drop_async_message(conn); | |
4238 | ||
4239 | spin_unlock_bh(&sess->conn_lock); | |
4240 | ||
4241 | /* | |
4242 | * If connection reinstatement is being performed on this connection, | |
4243 | * up the connection reinstatement semaphore that is being blocked on | |
4244 | * in iscsit_cause_connection_reinstatement(). | |
4245 | */ | |
4246 | spin_lock_bh(&conn->state_lock); | |
4247 | if (atomic_read(&conn->sleep_on_conn_wait_comp)) { | |
4248 | spin_unlock_bh(&conn->state_lock); | |
4249 | complete(&conn->conn_wait_comp); | |
4250 | wait_for_completion(&conn->conn_post_wait_comp); | |
4251 | spin_lock_bh(&conn->state_lock); | |
4252 | } | |
4253 | ||
4254 | /* | |
4255 | * If connection reinstatement is being performed on this connection | |
4256 | * by receiving a REMOVECONNFORRECOVERY logout request, up the | |
4257 | * connection wait rcfr semaphore that is being blocked on | |
4258 | * an iscsit_connection_reinstatement_rcfr(). | |
4259 | */ | |
4260 | if (atomic_read(&conn->connection_wait_rcfr)) { | |
4261 | spin_unlock_bh(&conn->state_lock); | |
4262 | complete(&conn->conn_wait_rcfr_comp); | |
4263 | wait_for_completion(&conn->conn_post_wait_comp); | |
4264 | spin_lock_bh(&conn->state_lock); | |
4265 | } | |
4266 | atomic_set(&conn->connection_reinstatement, 1); | |
4267 | spin_unlock_bh(&conn->state_lock); | |
4268 | ||
4269 | /* | |
4270 | * If any other processes are accessing this connection pointer we | |
4271 | * must wait until they have completed. | |
4272 | */ | |
4273 | iscsit_check_conn_usage_count(conn); | |
4274 | ||
4275 | if (conn->conn_rx_hash.tfm) | |
4276 | crypto_free_hash(conn->conn_rx_hash.tfm); | |
4277 | if (conn->conn_tx_hash.tfm) | |
4278 | crypto_free_hash(conn->conn_tx_hash.tfm); | |
4279 | ||
4280 | if (conn->conn_cpumask) | |
4281 | free_cpumask_var(conn->conn_cpumask); | |
4282 | ||
4283 | kfree(conn->conn_ops); | |
4284 | conn->conn_ops = NULL; | |
4285 | ||
bf6932f4 | 4286 | if (conn->sock) |
e48354ce | 4287 | sock_release(conn->sock); |
baa4d64b NB |
4288 | |
4289 | if (conn->conn_transport->iscsit_free_conn) | |
4290 | conn->conn_transport->iscsit_free_conn(conn); | |
4291 | ||
4292 | iscsit_put_transport(conn->conn_transport); | |
4293 | ||
e48354ce NB |
4294 | conn->thread_set = NULL; |
4295 | ||
4296 | pr_debug("Moving to TARG_CONN_STATE_FREE.\n"); | |
4297 | conn->conn_state = TARG_CONN_STATE_FREE; | |
4298 | kfree(conn); | |
4299 | ||
4300 | spin_lock_bh(&sess->conn_lock); | |
4301 | atomic_dec(&sess->nconn); | |
4302 | pr_debug("Decremented iSCSI connection count to %hu from node:" | |
4303 | " %s\n", atomic_read(&sess->nconn), | |
4304 | sess->sess_ops->InitiatorName); | |
4305 | /* | |
4306 | * Make sure that if one connection fails in an non ERL=2 iSCSI | |
4307 | * Session that they all fail. | |
4308 | */ | |
4309 | if ((sess->sess_ops->ErrorRecoveryLevel != 2) && !conn_logout && | |
4310 | !atomic_read(&sess->session_logout)) | |
4311 | atomic_set(&sess->session_fall_back_to_erl0, 1); | |
4312 | ||
4313 | /* | |
4314 | * If this was not the last connection in the session, and we are | |
4315 | * performing session reinstatement or falling back to ERL=0, call | |
4316 | * iscsit_stop_session() without sleeping to shutdown the other | |
4317 | * active connections. | |
4318 | */ | |
4319 | if (atomic_read(&sess->nconn)) { | |
4320 | if (!atomic_read(&sess->session_reinstatement) && | |
4321 | !atomic_read(&sess->session_fall_back_to_erl0)) { | |
4322 | spin_unlock_bh(&sess->conn_lock); | |
4323 | return 0; | |
4324 | } | |
4325 | if (!atomic_read(&sess->session_stop_active)) { | |
4326 | atomic_set(&sess->session_stop_active, 1); | |
4327 | spin_unlock_bh(&sess->conn_lock); | |
4328 | iscsit_stop_session(sess, 0, 0); | |
4329 | return 0; | |
4330 | } | |
4331 | spin_unlock_bh(&sess->conn_lock); | |
4332 | return 0; | |
4333 | } | |
4334 | ||
4335 | /* | |
4336 | * If this was the last connection in the session and one of the | |
4337 | * following is occurring: | |
4338 | * | |
4339 | * Session Reinstatement is not being performed, and are falling back | |
4340 | * to ERL=0 call iscsit_close_session(). | |
4341 | * | |
4342 | * Session Logout was requested. iscsit_close_session() will be called | |
4343 | * elsewhere. | |
4344 | * | |
4345 | * Session Continuation is not being performed, start the Time2Retain | |
4346 | * handler and check if sleep_on_sess_wait_sem is active. | |
4347 | */ | |
4348 | if (!atomic_read(&sess->session_reinstatement) && | |
4349 | atomic_read(&sess->session_fall_back_to_erl0)) { | |
4350 | spin_unlock_bh(&sess->conn_lock); | |
99367f01 | 4351 | target_put_session(sess->se_sess); |
e48354ce NB |
4352 | |
4353 | return 0; | |
4354 | } else if (atomic_read(&sess->session_logout)) { | |
4355 | pr_debug("Moving to TARG_SESS_STATE_FREE.\n"); | |
4356 | sess->session_state = TARG_SESS_STATE_FREE; | |
4357 | spin_unlock_bh(&sess->conn_lock); | |
4358 | ||
4359 | if (atomic_read(&sess->sleep_on_sess_wait_comp)) | |
4360 | complete(&sess->session_wait_comp); | |
4361 | ||
4362 | return 0; | |
4363 | } else { | |
4364 | pr_debug("Moving to TARG_SESS_STATE_FAILED.\n"); | |
4365 | sess->session_state = TARG_SESS_STATE_FAILED; | |
4366 | ||
4367 | if (!atomic_read(&sess->session_continuation)) { | |
4368 | spin_unlock_bh(&sess->conn_lock); | |
4369 | iscsit_start_time2retain_handler(sess); | |
4370 | } else | |
4371 | spin_unlock_bh(&sess->conn_lock); | |
4372 | ||
4373 | if (atomic_read(&sess->sleep_on_sess_wait_comp)) | |
4374 | complete(&sess->session_wait_comp); | |
4375 | ||
4376 | return 0; | |
4377 | } | |
4378 | spin_unlock_bh(&sess->conn_lock); | |
4379 | ||
4380 | return 0; | |
4381 | } | |
4382 | ||
4383 | int iscsit_close_session(struct iscsi_session *sess) | |
4384 | { | |
60bfcf8e | 4385 | struct iscsi_portal_group *tpg = sess->tpg; |
e48354ce NB |
4386 | struct se_portal_group *se_tpg = &tpg->tpg_se_tpg; |
4387 | ||
4388 | if (atomic_read(&sess->nconn)) { | |
4389 | pr_err("%d connection(s) still exist for iSCSI session" | |
4390 | " to %s\n", atomic_read(&sess->nconn), | |
4391 | sess->sess_ops->InitiatorName); | |
4392 | BUG(); | |
4393 | } | |
4394 | ||
4395 | spin_lock_bh(&se_tpg->session_lock); | |
4396 | atomic_set(&sess->session_logout, 1); | |
4397 | atomic_set(&sess->session_reinstatement, 1); | |
4398 | iscsit_stop_time2retain_timer(sess); | |
4399 | spin_unlock_bh(&se_tpg->session_lock); | |
4400 | ||
4401 | /* | |
4402 | * transport_deregister_session_configfs() will clear the | |
4403 | * struct se_node_acl->nacl_sess pointer now as a iscsi_np process context | |
4404 | * can be setting it again with __transport_register_session() in | |
4405 | * iscsi_post_login_handler() again after the iscsit_stop_session() | |
4406 | * completes in iscsi_np context. | |
4407 | */ | |
4408 | transport_deregister_session_configfs(sess->se_sess); | |
4409 | ||
4410 | /* | |
4411 | * If any other processes are accessing this session pointer we must | |
4412 | * wait until they have completed. If we are in an interrupt (the | |
4413 | * time2retain handler) and contain and active session usage count we | |
4414 | * restart the timer and exit. | |
4415 | */ | |
4416 | if (!in_interrupt()) { | |
4417 | if (iscsit_check_session_usage_count(sess) == 1) | |
4418 | iscsit_stop_session(sess, 1, 1); | |
4419 | } else { | |
4420 | if (iscsit_check_session_usage_count(sess) == 2) { | |
4421 | atomic_set(&sess->session_logout, 0); | |
4422 | iscsit_start_time2retain_handler(sess); | |
4423 | return 0; | |
4424 | } | |
4425 | } | |
4426 | ||
4427 | transport_deregister_session(sess->se_sess); | |
4428 | ||
4429 | if (sess->sess_ops->ErrorRecoveryLevel == 2) | |
4430 | iscsit_free_connection_recovery_entires(sess); | |
4431 | ||
4432 | iscsit_free_all_ooo_cmdsns(sess); | |
4433 | ||
4434 | spin_lock_bh(&se_tpg->session_lock); | |
4435 | pr_debug("Moving to TARG_SESS_STATE_FREE.\n"); | |
4436 | sess->session_state = TARG_SESS_STATE_FREE; | |
4437 | pr_debug("Released iSCSI session from node: %s\n", | |
4438 | sess->sess_ops->InitiatorName); | |
4439 | tpg->nsessions--; | |
4440 | if (tpg->tpg_tiqn) | |
4441 | tpg->tpg_tiqn->tiqn_nsessions--; | |
4442 | ||
4443 | pr_debug("Decremented number of active iSCSI Sessions on" | |
4444 | " iSCSI TPG: %hu to %u\n", tpg->tpgt, tpg->nsessions); | |
4445 | ||
4446 | spin_lock(&sess_idr_lock); | |
4447 | idr_remove(&sess_idr, sess->session_index); | |
4448 | spin_unlock(&sess_idr_lock); | |
4449 | ||
4450 | kfree(sess->sess_ops); | |
4451 | sess->sess_ops = NULL; | |
4452 | spin_unlock_bh(&se_tpg->session_lock); | |
4453 | ||
4454 | kfree(sess); | |
4455 | return 0; | |
4456 | } | |
4457 | ||
4458 | static void iscsit_logout_post_handler_closesession( | |
4459 | struct iscsi_conn *conn) | |
4460 | { | |
4461 | struct iscsi_session *sess = conn->sess; | |
4462 | ||
4463 | iscsi_set_thread_clear(conn, ISCSI_CLEAR_TX_THREAD); | |
4464 | iscsi_set_thread_set_signal(conn, ISCSI_SIGNAL_TX_THREAD); | |
4465 | ||
4466 | atomic_set(&conn->conn_logout_remove, 0); | |
4467 | complete(&conn->conn_logout_comp); | |
4468 | ||
4469 | iscsit_dec_conn_usage_count(conn); | |
4470 | iscsit_stop_session(sess, 1, 1); | |
4471 | iscsit_dec_session_usage_count(sess); | |
99367f01 | 4472 | target_put_session(sess->se_sess); |
e48354ce NB |
4473 | } |
4474 | ||
4475 | static void iscsit_logout_post_handler_samecid( | |
4476 | struct iscsi_conn *conn) | |
4477 | { | |
4478 | iscsi_set_thread_clear(conn, ISCSI_CLEAR_TX_THREAD); | |
4479 | iscsi_set_thread_set_signal(conn, ISCSI_SIGNAL_TX_THREAD); | |
4480 | ||
4481 | atomic_set(&conn->conn_logout_remove, 0); | |
4482 | complete(&conn->conn_logout_comp); | |
4483 | ||
4484 | iscsit_cause_connection_reinstatement(conn, 1); | |
4485 | iscsit_dec_conn_usage_count(conn); | |
4486 | } | |
4487 | ||
4488 | static void iscsit_logout_post_handler_diffcid( | |
4489 | struct iscsi_conn *conn, | |
4490 | u16 cid) | |
4491 | { | |
4492 | struct iscsi_conn *l_conn; | |
4493 | struct iscsi_session *sess = conn->sess; | |
4494 | ||
4495 | if (!sess) | |
4496 | return; | |
4497 | ||
4498 | spin_lock_bh(&sess->conn_lock); | |
4499 | list_for_each_entry(l_conn, &sess->sess_conn_list, conn_list) { | |
4500 | if (l_conn->cid == cid) { | |
4501 | iscsit_inc_conn_usage_count(l_conn); | |
4502 | break; | |
4503 | } | |
4504 | } | |
4505 | spin_unlock_bh(&sess->conn_lock); | |
4506 | ||
4507 | if (!l_conn) | |
4508 | return; | |
4509 | ||
4510 | if (l_conn->sock) | |
4511 | l_conn->sock->ops->shutdown(l_conn->sock, RCV_SHUTDOWN); | |
4512 | ||
4513 | spin_lock_bh(&l_conn->state_lock); | |
4514 | pr_debug("Moving to TARG_CONN_STATE_IN_LOGOUT.\n"); | |
4515 | l_conn->conn_state = TARG_CONN_STATE_IN_LOGOUT; | |
4516 | spin_unlock_bh(&l_conn->state_lock); | |
4517 | ||
4518 | iscsit_cause_connection_reinstatement(l_conn, 1); | |
4519 | iscsit_dec_conn_usage_count(l_conn); | |
4520 | } | |
4521 | ||
4522 | /* | |
4523 | * Return of 0 causes the TX thread to restart. | |
4524 | */ | |
2ec5a8c1 | 4525 | int iscsit_logout_post_handler( |
e48354ce NB |
4526 | struct iscsi_cmd *cmd, |
4527 | struct iscsi_conn *conn) | |
4528 | { | |
4529 | int ret = 0; | |
4530 | ||
4531 | switch (cmd->logout_reason) { | |
4532 | case ISCSI_LOGOUT_REASON_CLOSE_SESSION: | |
4533 | switch (cmd->logout_response) { | |
4534 | case ISCSI_LOGOUT_SUCCESS: | |
4535 | case ISCSI_LOGOUT_CLEANUP_FAILED: | |
4536 | default: | |
4537 | iscsit_logout_post_handler_closesession(conn); | |
4538 | break; | |
4539 | } | |
4540 | ret = 0; | |
4541 | break; | |
4542 | case ISCSI_LOGOUT_REASON_CLOSE_CONNECTION: | |
4543 | if (conn->cid == cmd->logout_cid) { | |
4544 | switch (cmd->logout_response) { | |
4545 | case ISCSI_LOGOUT_SUCCESS: | |
4546 | case ISCSI_LOGOUT_CLEANUP_FAILED: | |
4547 | default: | |
4548 | iscsit_logout_post_handler_samecid(conn); | |
4549 | break; | |
4550 | } | |
4551 | ret = 0; | |
4552 | } else { | |
4553 | switch (cmd->logout_response) { | |
4554 | case ISCSI_LOGOUT_SUCCESS: | |
4555 | iscsit_logout_post_handler_diffcid(conn, | |
4556 | cmd->logout_cid); | |
4557 | break; | |
4558 | case ISCSI_LOGOUT_CID_NOT_FOUND: | |
4559 | case ISCSI_LOGOUT_CLEANUP_FAILED: | |
4560 | default: | |
4561 | break; | |
4562 | } | |
4563 | ret = 1; | |
4564 | } | |
4565 | break; | |
4566 | case ISCSI_LOGOUT_REASON_RECOVERY: | |
4567 | switch (cmd->logout_response) { | |
4568 | case ISCSI_LOGOUT_SUCCESS: | |
4569 | case ISCSI_LOGOUT_CID_NOT_FOUND: | |
4570 | case ISCSI_LOGOUT_RECOVERY_UNSUPPORTED: | |
4571 | case ISCSI_LOGOUT_CLEANUP_FAILED: | |
4572 | default: | |
4573 | break; | |
4574 | } | |
4575 | ret = 1; | |
4576 | break; | |
4577 | default: | |
4578 | break; | |
4579 | ||
4580 | } | |
4581 | return ret; | |
4582 | } | |
2ec5a8c1 | 4583 | EXPORT_SYMBOL(iscsit_logout_post_handler); |
e48354ce NB |
4584 | |
4585 | void iscsit_fail_session(struct iscsi_session *sess) | |
4586 | { | |
4587 | struct iscsi_conn *conn; | |
4588 | ||
4589 | spin_lock_bh(&sess->conn_lock); | |
4590 | list_for_each_entry(conn, &sess->sess_conn_list, conn_list) { | |
4591 | pr_debug("Moving to TARG_CONN_STATE_CLEANUP_WAIT.\n"); | |
4592 | conn->conn_state = TARG_CONN_STATE_CLEANUP_WAIT; | |
4593 | } | |
4594 | spin_unlock_bh(&sess->conn_lock); | |
4595 | ||
4596 | pr_debug("Moving to TARG_SESS_STATE_FAILED.\n"); | |
4597 | sess->session_state = TARG_SESS_STATE_FAILED; | |
4598 | } | |
4599 | ||
4600 | int iscsit_free_session(struct iscsi_session *sess) | |
4601 | { | |
4602 | u16 conn_count = atomic_read(&sess->nconn); | |
4603 | struct iscsi_conn *conn, *conn_tmp = NULL; | |
4604 | int is_last; | |
4605 | ||
4606 | spin_lock_bh(&sess->conn_lock); | |
4607 | atomic_set(&sess->sleep_on_sess_wait_comp, 1); | |
4608 | ||
4609 | list_for_each_entry_safe(conn, conn_tmp, &sess->sess_conn_list, | |
4610 | conn_list) { | |
4611 | if (conn_count == 0) | |
4612 | break; | |
4613 | ||
4614 | if (list_is_last(&conn->conn_list, &sess->sess_conn_list)) { | |
4615 | is_last = 1; | |
4616 | } else { | |
4617 | iscsit_inc_conn_usage_count(conn_tmp); | |
4618 | is_last = 0; | |
4619 | } | |
4620 | iscsit_inc_conn_usage_count(conn); | |
4621 | ||
4622 | spin_unlock_bh(&sess->conn_lock); | |
4623 | iscsit_cause_connection_reinstatement(conn, 1); | |
4624 | spin_lock_bh(&sess->conn_lock); | |
4625 | ||
4626 | iscsit_dec_conn_usage_count(conn); | |
4627 | if (is_last == 0) | |
4628 | iscsit_dec_conn_usage_count(conn_tmp); | |
4629 | ||
4630 | conn_count--; | |
4631 | } | |
4632 | ||
4633 | if (atomic_read(&sess->nconn)) { | |
4634 | spin_unlock_bh(&sess->conn_lock); | |
4635 | wait_for_completion(&sess->session_wait_comp); | |
4636 | } else | |
4637 | spin_unlock_bh(&sess->conn_lock); | |
4638 | ||
99367f01 | 4639 | target_put_session(sess->se_sess); |
e48354ce NB |
4640 | return 0; |
4641 | } | |
4642 | ||
4643 | void iscsit_stop_session( | |
4644 | struct iscsi_session *sess, | |
4645 | int session_sleep, | |
4646 | int connection_sleep) | |
4647 | { | |
4648 | u16 conn_count = atomic_read(&sess->nconn); | |
4649 | struct iscsi_conn *conn, *conn_tmp = NULL; | |
4650 | int is_last; | |
4651 | ||
4652 | spin_lock_bh(&sess->conn_lock); | |
4653 | if (session_sleep) | |
4654 | atomic_set(&sess->sleep_on_sess_wait_comp, 1); | |
4655 | ||
4656 | if (connection_sleep) { | |
4657 | list_for_each_entry_safe(conn, conn_tmp, &sess->sess_conn_list, | |
4658 | conn_list) { | |
4659 | if (conn_count == 0) | |
4660 | break; | |
4661 | ||
4662 | if (list_is_last(&conn->conn_list, &sess->sess_conn_list)) { | |
4663 | is_last = 1; | |
4664 | } else { | |
4665 | iscsit_inc_conn_usage_count(conn_tmp); | |
4666 | is_last = 0; | |
4667 | } | |
4668 | iscsit_inc_conn_usage_count(conn); | |
4669 | ||
4670 | spin_unlock_bh(&sess->conn_lock); | |
4671 | iscsit_cause_connection_reinstatement(conn, 1); | |
4672 | spin_lock_bh(&sess->conn_lock); | |
4673 | ||
4674 | iscsit_dec_conn_usage_count(conn); | |
4675 | if (is_last == 0) | |
4676 | iscsit_dec_conn_usage_count(conn_tmp); | |
4677 | conn_count--; | |
4678 | } | |
4679 | } else { | |
4680 | list_for_each_entry(conn, &sess->sess_conn_list, conn_list) | |
4681 | iscsit_cause_connection_reinstatement(conn, 0); | |
4682 | } | |
4683 | ||
4684 | if (session_sleep && atomic_read(&sess->nconn)) { | |
4685 | spin_unlock_bh(&sess->conn_lock); | |
4686 | wait_for_completion(&sess->session_wait_comp); | |
4687 | } else | |
4688 | spin_unlock_bh(&sess->conn_lock); | |
4689 | } | |
4690 | ||
4691 | int iscsit_release_sessions_for_tpg(struct iscsi_portal_group *tpg, int force) | |
4692 | { | |
4693 | struct iscsi_session *sess; | |
4694 | struct se_portal_group *se_tpg = &tpg->tpg_se_tpg; | |
4695 | struct se_session *se_sess, *se_sess_tmp; | |
4696 | int session_count = 0; | |
4697 | ||
4698 | spin_lock_bh(&se_tpg->session_lock); | |
4699 | if (tpg->nsessions && !force) { | |
4700 | spin_unlock_bh(&se_tpg->session_lock); | |
4701 | return -1; | |
4702 | } | |
4703 | ||
4704 | list_for_each_entry_safe(se_sess, se_sess_tmp, &se_tpg->tpg_sess_list, | |
4705 | sess_list) { | |
4706 | sess = (struct iscsi_session *)se_sess->fabric_sess_ptr; | |
4707 | ||
4708 | spin_lock(&sess->conn_lock); | |
4709 | if (atomic_read(&sess->session_fall_back_to_erl0) || | |
4710 | atomic_read(&sess->session_logout) || | |
4711 | (sess->time2retain_timer_flags & ISCSI_TF_EXPIRED)) { | |
4712 | spin_unlock(&sess->conn_lock); | |
4713 | continue; | |
4714 | } | |
4715 | atomic_set(&sess->session_reinstatement, 1); | |
4716 | spin_unlock(&sess->conn_lock); | |
4717 | spin_unlock_bh(&se_tpg->session_lock); | |
4718 | ||
4719 | iscsit_free_session(sess); | |
4720 | spin_lock_bh(&se_tpg->session_lock); | |
4721 | ||
4722 | session_count++; | |
4723 | } | |
4724 | spin_unlock_bh(&se_tpg->session_lock); | |
4725 | ||
4726 | pr_debug("Released %d iSCSI Session(s) from Target Portal" | |
4727 | " Group: %hu\n", session_count, tpg->tpgt); | |
4728 | return 0; | |
4729 | } | |
4730 | ||
4731 | MODULE_DESCRIPTION("iSCSI-Target Driver for mainline target infrastructure"); | |
4732 | MODULE_VERSION("4.1.x"); | |
4733 | MODULE_AUTHOR("nab@Linux-iSCSI.org"); | |
4734 | MODULE_LICENSE("GPL"); | |
4735 | ||
4736 | module_init(iscsi_target_init_module); | |
4737 | module_exit(iscsi_target_cleanup_module); |