Commit | Line | Data |
---|---|---|
c66ac9db NB |
1 | /******************************************************************************* |
2 | * Filename: target_core_transport.c | |
3 | * | |
4 | * This file contains the Generic Target Engine Core. | |
5 | * | |
fd9a11d7 | 6 | * (c) Copyright 2002-2012 RisingTide Systems LLC. |
c66ac9db NB |
7 | * |
8 | * Nicholas A. Bellinger <nab@kernel.org> | |
9 | * | |
10 | * This program is free software; you can redistribute it and/or modify | |
11 | * it under the terms of the GNU General Public License as published by | |
12 | * the Free Software Foundation; either version 2 of the License, or | |
13 | * (at your option) any later version. | |
14 | * | |
15 | * This program is distributed in the hope that it will be useful, | |
16 | * but WITHOUT ANY WARRANTY; without even the implied warranty of | |
17 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
18 | * GNU General Public License for more details. | |
19 | * | |
20 | * You should have received a copy of the GNU General Public License | |
21 | * along with this program; if not, write to the Free Software | |
22 | * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. | |
23 | * | |
24 | ******************************************************************************/ | |
25 | ||
c66ac9db NB |
26 | #include <linux/net.h> |
27 | #include <linux/delay.h> | |
28 | #include <linux/string.h> | |
29 | #include <linux/timer.h> | |
30 | #include <linux/slab.h> | |
31 | #include <linux/blkdev.h> | |
32 | #include <linux/spinlock.h> | |
c66ac9db NB |
33 | #include <linux/kthread.h> |
34 | #include <linux/in.h> | |
35 | #include <linux/cdrom.h> | |
827509e3 | 36 | #include <linux/module.h> |
015487b8 | 37 | #include <linux/ratelimit.h> |
c66ac9db NB |
38 | #include <asm/unaligned.h> |
39 | #include <net/sock.h> | |
40 | #include <net/tcp.h> | |
41 | #include <scsi/scsi.h> | |
42 | #include <scsi/scsi_cmnd.h> | |
e66ecd50 | 43 | #include <scsi/scsi_tcq.h> |
c66ac9db NB |
44 | |
45 | #include <target/target_core_base.h> | |
c4795fb2 CH |
46 | #include <target/target_core_backend.h> |
47 | #include <target/target_core_fabric.h> | |
c66ac9db NB |
48 | #include <target/target_core_configfs.h> |
49 | ||
e26d99ae | 50 | #include "target_core_internal.h" |
c66ac9db | 51 | #include "target_core_alua.h" |
c66ac9db | 52 | #include "target_core_pr.h" |
c66ac9db NB |
53 | #include "target_core_ua.h" |
54 | ||
e5c0d6ad RD |
55 | #define CREATE_TRACE_POINTS |
56 | #include <trace/events/target.h> | |
57 | ||
35e0e757 | 58 | static struct workqueue_struct *target_completion_wq; |
c66ac9db | 59 | static struct kmem_cache *se_sess_cache; |
c66ac9db | 60 | struct kmem_cache *se_ua_cache; |
c66ac9db NB |
61 | struct kmem_cache *t10_pr_reg_cache; |
62 | struct kmem_cache *t10_alua_lu_gp_cache; | |
63 | struct kmem_cache *t10_alua_lu_gp_mem_cache; | |
64 | struct kmem_cache *t10_alua_tg_pt_gp_cache; | |
65 | struct kmem_cache *t10_alua_tg_pt_gp_mem_cache; | |
66 | ||
c66ac9db | 67 | static void transport_complete_task_attr(struct se_cmd *cmd); |
07bde79a | 68 | static void transport_handle_queue_full(struct se_cmd *cmd, |
e057f533 | 69 | struct se_device *dev); |
05d1c7c0 | 70 | static int transport_generic_get_mem(struct se_cmd *cmd); |
d5ddad41 | 71 | static int transport_put_cmd(struct se_cmd *cmd); |
35e0e757 | 72 | static void target_complete_ok_work(struct work_struct *work); |
c66ac9db | 73 | |
e3d6f909 | 74 | int init_se_kmem_caches(void) |
c66ac9db | 75 | { |
c66ac9db NB |
76 | se_sess_cache = kmem_cache_create("se_sess_cache", |
77 | sizeof(struct se_session), __alignof__(struct se_session), | |
78 | 0, NULL); | |
6708bb27 AG |
79 | if (!se_sess_cache) { |
80 | pr_err("kmem_cache_create() for struct se_session" | |
c66ac9db | 81 | " failed\n"); |
c8e31f26 | 82 | goto out; |
c66ac9db NB |
83 | } |
84 | se_ua_cache = kmem_cache_create("se_ua_cache", | |
85 | sizeof(struct se_ua), __alignof__(struct se_ua), | |
86 | 0, NULL); | |
6708bb27 AG |
87 | if (!se_ua_cache) { |
88 | pr_err("kmem_cache_create() for struct se_ua failed\n"); | |
35e0e757 | 89 | goto out_free_sess_cache; |
c66ac9db | 90 | } |
c66ac9db NB |
91 | t10_pr_reg_cache = kmem_cache_create("t10_pr_reg_cache", |
92 | sizeof(struct t10_pr_registration), | |
93 | __alignof__(struct t10_pr_registration), 0, NULL); | |
6708bb27 AG |
94 | if (!t10_pr_reg_cache) { |
95 | pr_err("kmem_cache_create() for struct t10_pr_registration" | |
c66ac9db | 96 | " failed\n"); |
35e0e757 | 97 | goto out_free_ua_cache; |
c66ac9db NB |
98 | } |
99 | t10_alua_lu_gp_cache = kmem_cache_create("t10_alua_lu_gp_cache", | |
100 | sizeof(struct t10_alua_lu_gp), __alignof__(struct t10_alua_lu_gp), | |
101 | 0, NULL); | |
6708bb27 AG |
102 | if (!t10_alua_lu_gp_cache) { |
103 | pr_err("kmem_cache_create() for t10_alua_lu_gp_cache" | |
c66ac9db | 104 | " failed\n"); |
35e0e757 | 105 | goto out_free_pr_reg_cache; |
c66ac9db NB |
106 | } |
107 | t10_alua_lu_gp_mem_cache = kmem_cache_create("t10_alua_lu_gp_mem_cache", | |
108 | sizeof(struct t10_alua_lu_gp_member), | |
109 | __alignof__(struct t10_alua_lu_gp_member), 0, NULL); | |
6708bb27 AG |
110 | if (!t10_alua_lu_gp_mem_cache) { |
111 | pr_err("kmem_cache_create() for t10_alua_lu_gp_mem_" | |
c66ac9db | 112 | "cache failed\n"); |
35e0e757 | 113 | goto out_free_lu_gp_cache; |
c66ac9db NB |
114 | } |
115 | t10_alua_tg_pt_gp_cache = kmem_cache_create("t10_alua_tg_pt_gp_cache", | |
116 | sizeof(struct t10_alua_tg_pt_gp), | |
117 | __alignof__(struct t10_alua_tg_pt_gp), 0, NULL); | |
6708bb27 AG |
118 | if (!t10_alua_tg_pt_gp_cache) { |
119 | pr_err("kmem_cache_create() for t10_alua_tg_pt_gp_" | |
c66ac9db | 120 | "cache failed\n"); |
35e0e757 | 121 | goto out_free_lu_gp_mem_cache; |
c66ac9db NB |
122 | } |
123 | t10_alua_tg_pt_gp_mem_cache = kmem_cache_create( | |
124 | "t10_alua_tg_pt_gp_mem_cache", | |
125 | sizeof(struct t10_alua_tg_pt_gp_member), | |
126 | __alignof__(struct t10_alua_tg_pt_gp_member), | |
127 | 0, NULL); | |
6708bb27 AG |
128 | if (!t10_alua_tg_pt_gp_mem_cache) { |
129 | pr_err("kmem_cache_create() for t10_alua_tg_pt_gp_" | |
c66ac9db | 130 | "mem_t failed\n"); |
35e0e757 | 131 | goto out_free_tg_pt_gp_cache; |
c66ac9db NB |
132 | } |
133 | ||
35e0e757 CH |
134 | target_completion_wq = alloc_workqueue("target_completion", |
135 | WQ_MEM_RECLAIM, 0); | |
136 | if (!target_completion_wq) | |
137 | goto out_free_tg_pt_gp_mem_cache; | |
138 | ||
c66ac9db | 139 | return 0; |
35e0e757 CH |
140 | |
141 | out_free_tg_pt_gp_mem_cache: | |
142 | kmem_cache_destroy(t10_alua_tg_pt_gp_mem_cache); | |
143 | out_free_tg_pt_gp_cache: | |
144 | kmem_cache_destroy(t10_alua_tg_pt_gp_cache); | |
145 | out_free_lu_gp_mem_cache: | |
146 | kmem_cache_destroy(t10_alua_lu_gp_mem_cache); | |
147 | out_free_lu_gp_cache: | |
148 | kmem_cache_destroy(t10_alua_lu_gp_cache); | |
149 | out_free_pr_reg_cache: | |
150 | kmem_cache_destroy(t10_pr_reg_cache); | |
151 | out_free_ua_cache: | |
152 | kmem_cache_destroy(se_ua_cache); | |
153 | out_free_sess_cache: | |
154 | kmem_cache_destroy(se_sess_cache); | |
c66ac9db | 155 | out: |
e3d6f909 | 156 | return -ENOMEM; |
c66ac9db NB |
157 | } |
158 | ||
e3d6f909 | 159 | void release_se_kmem_caches(void) |
c66ac9db | 160 | { |
35e0e757 | 161 | destroy_workqueue(target_completion_wq); |
c66ac9db NB |
162 | kmem_cache_destroy(se_sess_cache); |
163 | kmem_cache_destroy(se_ua_cache); | |
c66ac9db NB |
164 | kmem_cache_destroy(t10_pr_reg_cache); |
165 | kmem_cache_destroy(t10_alua_lu_gp_cache); | |
166 | kmem_cache_destroy(t10_alua_lu_gp_mem_cache); | |
167 | kmem_cache_destroy(t10_alua_tg_pt_gp_cache); | |
168 | kmem_cache_destroy(t10_alua_tg_pt_gp_mem_cache); | |
c66ac9db NB |
169 | } |
170 | ||
e3d6f909 AG |
171 | /* This code ensures unique mib indexes are handed out. */ |
172 | static DEFINE_SPINLOCK(scsi_mib_index_lock); | |
173 | static u32 scsi_mib_index[SCSI_INDEX_TYPE_MAX]; | |
e89d15ee NB |
174 | |
175 | /* | |
176 | * Allocate a new row index for the entry type specified | |
177 | */ | |
178 | u32 scsi_get_new_index(scsi_index_t type) | |
179 | { | |
180 | u32 new_index; | |
181 | ||
e3d6f909 | 182 | BUG_ON((type < 0) || (type >= SCSI_INDEX_TYPE_MAX)); |
e89d15ee | 183 | |
e3d6f909 AG |
184 | spin_lock(&scsi_mib_index_lock); |
185 | new_index = ++scsi_mib_index[type]; | |
186 | spin_unlock(&scsi_mib_index_lock); | |
e89d15ee NB |
187 | |
188 | return new_index; | |
189 | } | |
190 | ||
dbc5623e | 191 | void transport_subsystem_check_init(void) |
c66ac9db NB |
192 | { |
193 | int ret; | |
283669d2 | 194 | static int sub_api_initialized; |
c66ac9db | 195 | |
dbc5623e NB |
196 | if (sub_api_initialized) |
197 | return; | |
198 | ||
c66ac9db NB |
199 | ret = request_module("target_core_iblock"); |
200 | if (ret != 0) | |
6708bb27 | 201 | pr_err("Unable to load target_core_iblock\n"); |
c66ac9db NB |
202 | |
203 | ret = request_module("target_core_file"); | |
204 | if (ret != 0) | |
6708bb27 | 205 | pr_err("Unable to load target_core_file\n"); |
c66ac9db NB |
206 | |
207 | ret = request_module("target_core_pscsi"); | |
208 | if (ret != 0) | |
6708bb27 | 209 | pr_err("Unable to load target_core_pscsi\n"); |
c66ac9db | 210 | |
e3d6f909 | 211 | sub_api_initialized = 1; |
c66ac9db NB |
212 | } |
213 | ||
214 | struct se_session *transport_init_session(void) | |
215 | { | |
216 | struct se_session *se_sess; | |
217 | ||
218 | se_sess = kmem_cache_zalloc(se_sess_cache, GFP_KERNEL); | |
6708bb27 AG |
219 | if (!se_sess) { |
220 | pr_err("Unable to allocate struct se_session from" | |
c66ac9db NB |
221 | " se_sess_cache\n"); |
222 | return ERR_PTR(-ENOMEM); | |
223 | } | |
224 | INIT_LIST_HEAD(&se_sess->sess_list); | |
225 | INIT_LIST_HEAD(&se_sess->sess_acl_list); | |
a17f091d | 226 | INIT_LIST_HEAD(&se_sess->sess_cmd_list); |
9b31a328 | 227 | INIT_LIST_HEAD(&se_sess->sess_wait_list); |
a17f091d | 228 | spin_lock_init(&se_sess->sess_cmd_lock); |
41ac82b6 | 229 | kref_init(&se_sess->sess_kref); |
c66ac9db NB |
230 | |
231 | return se_sess; | |
232 | } | |
233 | EXPORT_SYMBOL(transport_init_session); | |
234 | ||
c0add7fd NB |
235 | int transport_alloc_session_tags(struct se_session *se_sess, |
236 | unsigned int tag_num, unsigned int tag_size) | |
237 | { | |
238 | int rc; | |
239 | ||
240 | se_sess->sess_cmd_map = kzalloc(tag_num * tag_size, GFP_KERNEL); | |
241 | if (!se_sess->sess_cmd_map) { | |
242 | pr_err("Unable to allocate se_sess->sess_cmd_map\n"); | |
243 | return -ENOMEM; | |
244 | } | |
245 | ||
246 | rc = percpu_ida_init(&se_sess->sess_tag_pool, tag_num); | |
247 | if (rc < 0) { | |
248 | pr_err("Unable to init se_sess->sess_tag_pool," | |
249 | " tag_num: %u\n", tag_num); | |
250 | kfree(se_sess->sess_cmd_map); | |
251 | se_sess->sess_cmd_map = NULL; | |
252 | return -ENOMEM; | |
253 | } | |
254 | ||
255 | return 0; | |
256 | } | |
257 | EXPORT_SYMBOL(transport_alloc_session_tags); | |
258 | ||
259 | struct se_session *transport_init_session_tags(unsigned int tag_num, | |
260 | unsigned int tag_size) | |
261 | { | |
262 | struct se_session *se_sess; | |
263 | int rc; | |
264 | ||
265 | se_sess = transport_init_session(); | |
266 | if (IS_ERR(se_sess)) | |
267 | return se_sess; | |
268 | ||
269 | rc = transport_alloc_session_tags(se_sess, tag_num, tag_size); | |
270 | if (rc < 0) { | |
271 | transport_free_session(se_sess); | |
272 | return ERR_PTR(-ENOMEM); | |
273 | } | |
274 | ||
275 | return se_sess; | |
276 | } | |
277 | EXPORT_SYMBOL(transport_init_session_tags); | |
278 | ||
c66ac9db | 279 | /* |
140854cb | 280 | * Called with spin_lock_irqsave(&struct se_portal_group->session_lock called. |
c66ac9db NB |
281 | */ |
282 | void __transport_register_session( | |
283 | struct se_portal_group *se_tpg, | |
284 | struct se_node_acl *se_nacl, | |
285 | struct se_session *se_sess, | |
286 | void *fabric_sess_ptr) | |
287 | { | |
288 | unsigned char buf[PR_REG_ISID_LEN]; | |
289 | ||
290 | se_sess->se_tpg = se_tpg; | |
291 | se_sess->fabric_sess_ptr = fabric_sess_ptr; | |
292 | /* | |
293 | * Used by struct se_node_acl's under ConfigFS to locate active se_session-t | |
294 | * | |
295 | * Only set for struct se_session's that will actually be moving I/O. | |
296 | * eg: *NOT* discovery sessions. | |
297 | */ | |
298 | if (se_nacl) { | |
299 | /* | |
300 | * If the fabric module supports an ISID based TransportID, | |
301 | * save this value in binary from the fabric I_T Nexus now. | |
302 | */ | |
e3d6f909 | 303 | if (se_tpg->se_tpg_tfo->sess_get_initiator_sid != NULL) { |
c66ac9db | 304 | memset(&buf[0], 0, PR_REG_ISID_LEN); |
e3d6f909 | 305 | se_tpg->se_tpg_tfo->sess_get_initiator_sid(se_sess, |
c66ac9db NB |
306 | &buf[0], PR_REG_ISID_LEN); |
307 | se_sess->sess_bin_isid = get_unaligned_be64(&buf[0]); | |
308 | } | |
afb999ff NB |
309 | kref_get(&se_nacl->acl_kref); |
310 | ||
c66ac9db NB |
311 | spin_lock_irq(&se_nacl->nacl_sess_lock); |
312 | /* | |
313 | * The se_nacl->nacl_sess pointer will be set to the | |
314 | * last active I_T Nexus for each struct se_node_acl. | |
315 | */ | |
316 | se_nacl->nacl_sess = se_sess; | |
317 | ||
318 | list_add_tail(&se_sess->sess_acl_list, | |
319 | &se_nacl->acl_sess_list); | |
320 | spin_unlock_irq(&se_nacl->nacl_sess_lock); | |
321 | } | |
322 | list_add_tail(&se_sess->sess_list, &se_tpg->tpg_sess_list); | |
323 | ||
6708bb27 | 324 | pr_debug("TARGET_CORE[%s]: Registered fabric_sess_ptr: %p\n", |
e3d6f909 | 325 | se_tpg->se_tpg_tfo->get_fabric_name(), se_sess->fabric_sess_ptr); |
c66ac9db NB |
326 | } |
327 | EXPORT_SYMBOL(__transport_register_session); | |
328 | ||
329 | void transport_register_session( | |
330 | struct se_portal_group *se_tpg, | |
331 | struct se_node_acl *se_nacl, | |
332 | struct se_session *se_sess, | |
333 | void *fabric_sess_ptr) | |
334 | { | |
140854cb NB |
335 | unsigned long flags; |
336 | ||
337 | spin_lock_irqsave(&se_tpg->session_lock, flags); | |
c66ac9db | 338 | __transport_register_session(se_tpg, se_nacl, se_sess, fabric_sess_ptr); |
140854cb | 339 | spin_unlock_irqrestore(&se_tpg->session_lock, flags); |
c66ac9db NB |
340 | } |
341 | EXPORT_SYMBOL(transport_register_session); | |
342 | ||
ecf0dd66 | 343 | static void target_release_session(struct kref *kref) |
41ac82b6 NB |
344 | { |
345 | struct se_session *se_sess = container_of(kref, | |
346 | struct se_session, sess_kref); | |
347 | struct se_portal_group *se_tpg = se_sess->se_tpg; | |
348 | ||
349 | se_tpg->se_tpg_tfo->close_session(se_sess); | |
350 | } | |
351 | ||
352 | void target_get_session(struct se_session *se_sess) | |
353 | { | |
354 | kref_get(&se_sess->sess_kref); | |
355 | } | |
356 | EXPORT_SYMBOL(target_get_session); | |
357 | ||
33933a0e | 358 | void target_put_session(struct se_session *se_sess) |
41ac82b6 | 359 | { |
4149268e JE |
360 | struct se_portal_group *tpg = se_sess->se_tpg; |
361 | ||
362 | if (tpg->se_tpg_tfo->put_session != NULL) { | |
363 | tpg->se_tpg_tfo->put_session(se_sess); | |
364 | return; | |
365 | } | |
33933a0e | 366 | kref_put(&se_sess->sess_kref, target_release_session); |
41ac82b6 NB |
367 | } |
368 | EXPORT_SYMBOL(target_put_session); | |
369 | ||
afb999ff NB |
370 | static void target_complete_nacl(struct kref *kref) |
371 | { | |
372 | struct se_node_acl *nacl = container_of(kref, | |
373 | struct se_node_acl, acl_kref); | |
374 | ||
375 | complete(&nacl->acl_free_comp); | |
376 | } | |
377 | ||
378 | void target_put_nacl(struct se_node_acl *nacl) | |
379 | { | |
380 | kref_put(&nacl->acl_kref, target_complete_nacl); | |
381 | } | |
382 | ||
c66ac9db NB |
383 | void transport_deregister_session_configfs(struct se_session *se_sess) |
384 | { | |
385 | struct se_node_acl *se_nacl; | |
23388864 | 386 | unsigned long flags; |
c66ac9db NB |
387 | /* |
388 | * Used by struct se_node_acl's under ConfigFS to locate active struct se_session | |
389 | */ | |
390 | se_nacl = se_sess->se_node_acl; | |
6708bb27 | 391 | if (se_nacl) { |
23388864 | 392 | spin_lock_irqsave(&se_nacl->nacl_sess_lock, flags); |
337c0607 NB |
393 | if (se_nacl->acl_stop == 0) |
394 | list_del(&se_sess->sess_acl_list); | |
c66ac9db NB |
395 | /* |
396 | * If the session list is empty, then clear the pointer. | |
397 | * Otherwise, set the struct se_session pointer from the tail | |
398 | * element of the per struct se_node_acl active session list. | |
399 | */ | |
400 | if (list_empty(&se_nacl->acl_sess_list)) | |
401 | se_nacl->nacl_sess = NULL; | |
402 | else { | |
403 | se_nacl->nacl_sess = container_of( | |
404 | se_nacl->acl_sess_list.prev, | |
405 | struct se_session, sess_acl_list); | |
406 | } | |
23388864 | 407 | spin_unlock_irqrestore(&se_nacl->nacl_sess_lock, flags); |
c66ac9db NB |
408 | } |
409 | } | |
410 | EXPORT_SYMBOL(transport_deregister_session_configfs); | |
411 | ||
412 | void transport_free_session(struct se_session *se_sess) | |
413 | { | |
c0add7fd NB |
414 | if (se_sess->sess_cmd_map) { |
415 | percpu_ida_destroy(&se_sess->sess_tag_pool); | |
416 | kfree(se_sess->sess_cmd_map); | |
417 | } | |
c66ac9db NB |
418 | kmem_cache_free(se_sess_cache, se_sess); |
419 | } | |
420 | EXPORT_SYMBOL(transport_free_session); | |
421 | ||
422 | void transport_deregister_session(struct se_session *se_sess) | |
423 | { | |
424 | struct se_portal_group *se_tpg = se_sess->se_tpg; | |
01468346 | 425 | struct target_core_fabric_ops *se_tfo; |
c66ac9db | 426 | struct se_node_acl *se_nacl; |
e63a8e19 | 427 | unsigned long flags; |
01468346 | 428 | bool comp_nacl = true; |
c66ac9db | 429 | |
6708bb27 | 430 | if (!se_tpg) { |
c66ac9db NB |
431 | transport_free_session(se_sess); |
432 | return; | |
433 | } | |
01468346 | 434 | se_tfo = se_tpg->se_tpg_tfo; |
c66ac9db | 435 | |
e63a8e19 | 436 | spin_lock_irqsave(&se_tpg->session_lock, flags); |
c66ac9db NB |
437 | list_del(&se_sess->sess_list); |
438 | se_sess->se_tpg = NULL; | |
439 | se_sess->fabric_sess_ptr = NULL; | |
e63a8e19 | 440 | spin_unlock_irqrestore(&se_tpg->session_lock, flags); |
c66ac9db NB |
441 | |
442 | /* | |
443 | * Determine if we need to do extra work for this initiator node's | |
444 | * struct se_node_acl if it had been previously dynamically generated. | |
445 | */ | |
446 | se_nacl = se_sess->se_node_acl; | |
01468346 NB |
447 | |
448 | spin_lock_irqsave(&se_tpg->acl_node_lock, flags); | |
449 | if (se_nacl && se_nacl->dynamic_node_acl) { | |
450 | if (!se_tfo->tpg_check_demo_mode_cache(se_tpg)) { | |
451 | list_del(&se_nacl->acl_list); | |
452 | se_tpg->num_node_acls--; | |
453 | spin_unlock_irqrestore(&se_tpg->acl_node_lock, flags); | |
454 | core_tpg_wait_for_nacl_pr_ref(se_nacl); | |
455 | core_free_device_list_for_node(se_nacl, se_tpg); | |
456 | se_tfo->tpg_release_fabric_acl(se_tpg, se_nacl); | |
457 | ||
458 | comp_nacl = false; | |
459 | spin_lock_irqsave(&se_tpg->acl_node_lock, flags); | |
c66ac9db | 460 | } |
c66ac9db | 461 | } |
01468346 | 462 | spin_unlock_irqrestore(&se_tpg->acl_node_lock, flags); |
c66ac9db | 463 | |
6708bb27 | 464 | pr_debug("TARGET_CORE[%s]: Deregistered fabric_sess\n", |
e3d6f909 | 465 | se_tpg->se_tpg_tfo->get_fabric_name()); |
01468346 | 466 | /* |
afb999ff NB |
467 | * If last kref is dropping now for an explict NodeACL, awake sleeping |
468 | * ->acl_free_comp caller to wakeup configfs se_node_acl->acl_group | |
469 | * removal context. | |
01468346 NB |
470 | */ |
471 | if (se_nacl && comp_nacl == true) | |
afb999ff | 472 | target_put_nacl(se_nacl); |
01468346 | 473 | |
afb999ff | 474 | transport_free_session(se_sess); |
c66ac9db NB |
475 | } |
476 | EXPORT_SYMBOL(transport_deregister_session); | |
477 | ||
478 | /* | |
a1d8b49a | 479 | * Called with cmd->t_state_lock held. |
c66ac9db | 480 | */ |
cf572a96 | 481 | static void target_remove_from_state_list(struct se_cmd *cmd) |
c66ac9db | 482 | { |
42bf829e | 483 | struct se_device *dev = cmd->se_dev; |
c66ac9db NB |
484 | unsigned long flags; |
485 | ||
42bf829e CH |
486 | if (!dev) |
487 | return; | |
c66ac9db | 488 | |
cf572a96 CH |
489 | if (cmd->transport_state & CMD_T_BUSY) |
490 | return; | |
c66ac9db | 491 | |
cf572a96 CH |
492 | spin_lock_irqsave(&dev->execute_task_lock, flags); |
493 | if (cmd->state_active) { | |
494 | list_del(&cmd->state_list); | |
cf572a96 | 495 | cmd->state_active = false; |
c66ac9db | 496 | } |
cf572a96 | 497 | spin_unlock_irqrestore(&dev->execute_task_lock, flags); |
c66ac9db NB |
498 | } |
499 | ||
862e6389 NB |
500 | static int transport_cmd_check_stop(struct se_cmd *cmd, bool remove_from_lists, |
501 | bool write_pending) | |
c66ac9db NB |
502 | { |
503 | unsigned long flags; | |
504 | ||
a1d8b49a | 505 | spin_lock_irqsave(&cmd->t_state_lock, flags); |
862e6389 NB |
506 | if (write_pending) |
507 | cmd->t_state = TRANSPORT_WRITE_PENDING; | |
508 | ||
c66ac9db NB |
509 | /* |
510 | * Determine if IOCTL context caller in requesting the stopping of this | |
511 | * command for LUN shutdown purposes. | |
512 | */ | |
7d680f3b CH |
513 | if (cmd->transport_state & CMD_T_LUN_STOP) { |
514 | pr_debug("%s:%d CMD_T_LUN_STOP for ITT: 0x%08x\n", | |
515 | __func__, __LINE__, cmd->se_tfo->get_task_tag(cmd)); | |
c66ac9db | 516 | |
7d680f3b | 517 | cmd->transport_state &= ~CMD_T_ACTIVE; |
f7113a47 | 518 | if (remove_from_lists) |
cf572a96 | 519 | target_remove_from_state_list(cmd); |
a1d8b49a | 520 | spin_unlock_irqrestore(&cmd->t_state_lock, flags); |
c66ac9db | 521 | |
a1d8b49a | 522 | complete(&cmd->transport_lun_stop_comp); |
c66ac9db NB |
523 | return 1; |
524 | } | |
f7113a47 CH |
525 | |
526 | if (remove_from_lists) { | |
527 | target_remove_from_state_list(cmd); | |
528 | ||
529 | /* | |
530 | * Clear struct se_cmd->se_lun before the handoff to FE. | |
531 | */ | |
532 | cmd->se_lun = NULL; | |
533 | } | |
534 | ||
c66ac9db NB |
535 | /* |
536 | * Determine if frontend context caller is requesting the stopping of | |
e3d6f909 | 537 | * this command for frontend exceptions. |
c66ac9db | 538 | */ |
7d680f3b CH |
539 | if (cmd->transport_state & CMD_T_STOP) { |
540 | pr_debug("%s:%d CMD_T_STOP for ITT: 0x%08x\n", | |
541 | __func__, __LINE__, | |
e3d6f909 | 542 | cmd->se_tfo->get_task_tag(cmd)); |
c66ac9db | 543 | |
a1d8b49a | 544 | spin_unlock_irqrestore(&cmd->t_state_lock, flags); |
c66ac9db | 545 | |
a1d8b49a | 546 | complete(&cmd->t_transport_stop_comp); |
c66ac9db NB |
547 | return 1; |
548 | } | |
f7113a47 CH |
549 | |
550 | cmd->transport_state &= ~CMD_T_ACTIVE; | |
551 | if (remove_from_lists) { | |
552 | /* | |
553 | * Some fabric modules like tcm_loop can release | |
554 | * their internally allocated I/O reference now and | |
555 | * struct se_cmd now. | |
556 | * | |
557 | * Fabric modules are expected to return '1' here if the | |
558 | * se_cmd being passed is released at this point, | |
559 | * or zero if not being released. | |
560 | */ | |
561 | if (cmd->se_tfo->check_stop_free != NULL) { | |
562 | spin_unlock_irqrestore(&cmd->t_state_lock, flags); | |
563 | return cmd->se_tfo->check_stop_free(cmd); | |
c66ac9db | 564 | } |
f7113a47 | 565 | } |
c66ac9db | 566 | |
a1d8b49a | 567 | spin_unlock_irqrestore(&cmd->t_state_lock, flags); |
c66ac9db NB |
568 | return 0; |
569 | } | |
570 | ||
571 | static int transport_cmd_check_stop_to_fabric(struct se_cmd *cmd) | |
572 | { | |
862e6389 | 573 | return transport_cmd_check_stop(cmd, true, false); |
c66ac9db NB |
574 | } |
575 | ||
576 | static void transport_lun_remove_cmd(struct se_cmd *cmd) | |
577 | { | |
e3d6f909 | 578 | struct se_lun *lun = cmd->se_lun; |
c66ac9db NB |
579 | unsigned long flags; |
580 | ||
581 | if (!lun) | |
582 | return; | |
583 | ||
c66ac9db | 584 | spin_lock_irqsave(&lun->lun_cmd_lock, flags); |
3d26fea0 CH |
585 | if (!list_empty(&cmd->se_lun_node)) |
586 | list_del_init(&cmd->se_lun_node); | |
c66ac9db NB |
587 | spin_unlock_irqrestore(&lun->lun_cmd_lock, flags); |
588 | } | |
589 | ||
590 | void transport_cmd_finish_abort(struct se_cmd *cmd, int remove) | |
591 | { | |
c66ac9db NB |
592 | if (transport_cmd_check_stop_to_fabric(cmd)) |
593 | return; | |
af877292 | 594 | if (remove) |
e6a2573f | 595 | transport_put_cmd(cmd); |
c66ac9db NB |
596 | } |
597 | ||
35e0e757 CH |
598 | static void target_complete_failure_work(struct work_struct *work) |
599 | { | |
600 | struct se_cmd *cmd = container_of(work, struct se_cmd, work); | |
601 | ||
de103c93 CH |
602 | transport_generic_request_failure(cmd, |
603 | TCM_LOGICAL_UNIT_COMMUNICATION_FAILURE); | |
35e0e757 CH |
604 | } |
605 | ||
6138ed2a | 606 | /* |
d5829eac PB |
607 | * Used when asking transport to copy Sense Data from the underlying |
608 | * Linux/SCSI struct scsi_cmnd | |
6138ed2a | 609 | */ |
d5829eac | 610 | static unsigned char *transport_get_sense_buffer(struct se_cmd *cmd) |
6138ed2a | 611 | { |
6138ed2a | 612 | struct se_device *dev = cmd->se_dev; |
6138ed2a PB |
613 | |
614 | WARN_ON(!cmd->se_lun); | |
615 | ||
616 | if (!dev) | |
d5829eac | 617 | return NULL; |
6138ed2a | 618 | |
d5829eac PB |
619 | if (cmd->se_cmd_flags & SCF_SENT_CHECK_CONDITION) |
620 | return NULL; | |
6138ed2a | 621 | |
9c58b7dd | 622 | cmd->scsi_sense_length = TRANSPORT_SENSE_BUFFER; |
6138ed2a | 623 | |
d5829eac | 624 | pr_debug("HBA_[%u]_PLUG[%s]: Requesting sense for SAM STATUS: 0x%02x\n", |
6138ed2a | 625 | dev->se_hba->hba_id, dev->transport->name, cmd->scsi_status); |
9c58b7dd | 626 | return cmd->sense_buffer; |
6138ed2a PB |
627 | } |
628 | ||
5787cacd | 629 | void target_complete_cmd(struct se_cmd *cmd, u8 scsi_status) |
c66ac9db | 630 | { |
42bf829e | 631 | struct se_device *dev = cmd->se_dev; |
5787cacd | 632 | int success = scsi_status == GOOD; |
c66ac9db | 633 | unsigned long flags; |
c66ac9db | 634 | |
5787cacd CH |
635 | cmd->scsi_status = scsi_status; |
636 | ||
637 | ||
a1d8b49a | 638 | spin_lock_irqsave(&cmd->t_state_lock, flags); |
cf572a96 | 639 | cmd->transport_state &= ~CMD_T_BUSY; |
c66ac9db | 640 | |
c66ac9db | 641 | if (dev && dev->transport->transport_complete) { |
d5829eac PB |
642 | dev->transport->transport_complete(cmd, |
643 | cmd->t_data_sg, | |
644 | transport_get_sense_buffer(cmd)); | |
645 | if (cmd->se_cmd_flags & SCF_TRANSPORT_TASK_SENSE) | |
c66ac9db | 646 | success = 1; |
c66ac9db NB |
647 | } |
648 | ||
649 | /* | |
5787cacd | 650 | * See if we are waiting to complete for an exception condition. |
c66ac9db | 651 | */ |
cf572a96 | 652 | if (cmd->transport_state & CMD_T_REQUEST_STOP) { |
a1d8b49a | 653 | spin_unlock_irqrestore(&cmd->t_state_lock, flags); |
cf572a96 | 654 | complete(&cmd->task_stop_comp); |
c66ac9db NB |
655 | return; |
656 | } | |
2235007c CH |
657 | |
658 | if (!success) | |
7d680f3b | 659 | cmd->transport_state |= CMD_T_FAILED; |
2235007c | 660 | |
3d28934a NB |
661 | /* |
662 | * Check for case where an explict ABORT_TASK has been received | |
663 | * and transport_wait_for_tasks() will be waiting for completion.. | |
664 | */ | |
665 | if (cmd->transport_state & CMD_T_ABORTED && | |
666 | cmd->transport_state & CMD_T_STOP) { | |
667 | spin_unlock_irqrestore(&cmd->t_state_lock, flags); | |
668 | complete(&cmd->t_transport_stop_comp); | |
669 | return; | |
670 | } else if (cmd->transport_state & CMD_T_FAILED) { | |
35e0e757 | 671 | INIT_WORK(&cmd->work, target_complete_failure_work); |
c66ac9db | 672 | } else { |
35e0e757 | 673 | INIT_WORK(&cmd->work, target_complete_ok_work); |
c66ac9db | 674 | } |
35e0e757 | 675 | |
35e0e757 | 676 | cmd->t_state = TRANSPORT_COMPLETE; |
3d28934a | 677 | cmd->transport_state |= (CMD_T_COMPLETE | CMD_T_ACTIVE); |
a1d8b49a | 678 | spin_unlock_irqrestore(&cmd->t_state_lock, flags); |
c66ac9db | 679 | |
35e0e757 | 680 | queue_work(target_completion_wq, &cmd->work); |
c66ac9db | 681 | } |
6bb35e00 CH |
682 | EXPORT_SYMBOL(target_complete_cmd); |
683 | ||
cf572a96 | 684 | static void target_add_to_state_list(struct se_cmd *cmd) |
c66ac9db | 685 | { |
cf572a96 CH |
686 | struct se_device *dev = cmd->se_dev; |
687 | unsigned long flags; | |
c66ac9db | 688 | |
cf572a96 CH |
689 | spin_lock_irqsave(&dev->execute_task_lock, flags); |
690 | if (!cmd->state_active) { | |
691 | list_add_tail(&cmd->state_list, &dev->state_list); | |
692 | cmd->state_active = true; | |
c66ac9db | 693 | } |
cf572a96 | 694 | spin_unlock_irqrestore(&dev->execute_task_lock, flags); |
c66ac9db NB |
695 | } |
696 | ||
07bde79a | 697 | /* |
f147abb4 | 698 | * Handle QUEUE_FULL / -EAGAIN and -ENOMEM status |
07bde79a | 699 | */ |
7a6f0a1e CH |
700 | static void transport_write_pending_qf(struct se_cmd *cmd); |
701 | static void transport_complete_qf(struct se_cmd *cmd); | |
07bde79a | 702 | |
0fd97ccf | 703 | void target_qf_do_work(struct work_struct *work) |
07bde79a NB |
704 | { |
705 | struct se_device *dev = container_of(work, struct se_device, | |
706 | qf_work_queue); | |
bcac364a | 707 | LIST_HEAD(qf_cmd_list); |
07bde79a NB |
708 | struct se_cmd *cmd, *cmd_tmp; |
709 | ||
710 | spin_lock_irq(&dev->qf_cmd_lock); | |
bcac364a RD |
711 | list_splice_init(&dev->qf_cmd_list, &qf_cmd_list); |
712 | spin_unlock_irq(&dev->qf_cmd_lock); | |
07bde79a | 713 | |
bcac364a | 714 | list_for_each_entry_safe(cmd, cmd_tmp, &qf_cmd_list, se_qf_node) { |
07bde79a NB |
715 | list_del(&cmd->se_qf_node); |
716 | atomic_dec(&dev->dev_qf_count); | |
717 | smp_mb__after_atomic_dec(); | |
07bde79a | 718 | |
6708bb27 | 719 | pr_debug("Processing %s cmd: %p QUEUE_FULL in work queue" |
07bde79a | 720 | " context: %s\n", cmd->se_tfo->get_fabric_name(), cmd, |
e057f533 | 721 | (cmd->t_state == TRANSPORT_COMPLETE_QF_OK) ? "COMPLETE_OK" : |
07bde79a NB |
722 | (cmd->t_state == TRANSPORT_COMPLETE_QF_WP) ? "WRITE_PENDING" |
723 | : "UNKNOWN"); | |
f7a5cc0b | 724 | |
7a6f0a1e CH |
725 | if (cmd->t_state == TRANSPORT_COMPLETE_QF_WP) |
726 | transport_write_pending_qf(cmd); | |
727 | else if (cmd->t_state == TRANSPORT_COMPLETE_QF_OK) | |
728 | transport_complete_qf(cmd); | |
07bde79a | 729 | } |
07bde79a NB |
730 | } |
731 | ||
c66ac9db NB |
732 | unsigned char *transport_dump_cmd_direction(struct se_cmd *cmd) |
733 | { | |
734 | switch (cmd->data_direction) { | |
735 | case DMA_NONE: | |
736 | return "NONE"; | |
737 | case DMA_FROM_DEVICE: | |
738 | return "READ"; | |
739 | case DMA_TO_DEVICE: | |
740 | return "WRITE"; | |
741 | case DMA_BIDIRECTIONAL: | |
742 | return "BIDI"; | |
743 | default: | |
744 | break; | |
745 | } | |
746 | ||
747 | return "UNKNOWN"; | |
748 | } | |
749 | ||
750 | void transport_dump_dev_state( | |
751 | struct se_device *dev, | |
752 | char *b, | |
753 | int *bl) | |
754 | { | |
755 | *bl += sprintf(b + *bl, "Status: "); | |
0fd97ccf | 756 | if (dev->export_count) |
c66ac9db | 757 | *bl += sprintf(b + *bl, "ACTIVATED"); |
0fd97ccf | 758 | else |
c66ac9db | 759 | *bl += sprintf(b + *bl, "DEACTIVATED"); |
c66ac9db | 760 | |
5f41a31d | 761 | *bl += sprintf(b + *bl, " Max Queue Depth: %d", dev->queue_depth); |
11e764bd | 762 | *bl += sprintf(b + *bl, " SectorSize: %u HwMaxSectors: %u\n", |
0fd97ccf CH |
763 | dev->dev_attrib.block_size, |
764 | dev->dev_attrib.hw_max_sectors); | |
c66ac9db NB |
765 | *bl += sprintf(b + *bl, " "); |
766 | } | |
767 | ||
c66ac9db NB |
768 | void transport_dump_vpd_proto_id( |
769 | struct t10_vpd *vpd, | |
770 | unsigned char *p_buf, | |
771 | int p_buf_len) | |
772 | { | |
773 | unsigned char buf[VPD_TMP_BUF_SIZE]; | |
774 | int len; | |
775 | ||
776 | memset(buf, 0, VPD_TMP_BUF_SIZE); | |
777 | len = sprintf(buf, "T10 VPD Protocol Identifier: "); | |
778 | ||
779 | switch (vpd->protocol_identifier) { | |
780 | case 0x00: | |
781 | sprintf(buf+len, "Fibre Channel\n"); | |
782 | break; | |
783 | case 0x10: | |
784 | sprintf(buf+len, "Parallel SCSI\n"); | |
785 | break; | |
786 | case 0x20: | |
787 | sprintf(buf+len, "SSA\n"); | |
788 | break; | |
789 | case 0x30: | |
790 | sprintf(buf+len, "IEEE 1394\n"); | |
791 | break; | |
792 | case 0x40: | |
793 | sprintf(buf+len, "SCSI Remote Direct Memory Access" | |
794 | " Protocol\n"); | |
795 | break; | |
796 | case 0x50: | |
797 | sprintf(buf+len, "Internet SCSI (iSCSI)\n"); | |
798 | break; | |
799 | case 0x60: | |
800 | sprintf(buf+len, "SAS Serial SCSI Protocol\n"); | |
801 | break; | |
802 | case 0x70: | |
803 | sprintf(buf+len, "Automation/Drive Interface Transport" | |
804 | " Protocol\n"); | |
805 | break; | |
806 | case 0x80: | |
807 | sprintf(buf+len, "AT Attachment Interface ATA/ATAPI\n"); | |
808 | break; | |
809 | default: | |
810 | sprintf(buf+len, "Unknown 0x%02x\n", | |
811 | vpd->protocol_identifier); | |
812 | break; | |
813 | } | |
814 | ||
815 | if (p_buf) | |
816 | strncpy(p_buf, buf, p_buf_len); | |
817 | else | |
6708bb27 | 818 | pr_debug("%s", buf); |
c66ac9db NB |
819 | } |
820 | ||
821 | void | |
822 | transport_set_vpd_proto_id(struct t10_vpd *vpd, unsigned char *page_83) | |
823 | { | |
824 | /* | |
825 | * Check if the Protocol Identifier Valid (PIV) bit is set.. | |
826 | * | |
827 | * from spc3r23.pdf section 7.5.1 | |
828 | */ | |
829 | if (page_83[1] & 0x80) { | |
830 | vpd->protocol_identifier = (page_83[0] & 0xf0); | |
831 | vpd->protocol_identifier_set = 1; | |
832 | transport_dump_vpd_proto_id(vpd, NULL, 0); | |
833 | } | |
834 | } | |
835 | EXPORT_SYMBOL(transport_set_vpd_proto_id); | |
836 | ||
837 | int transport_dump_vpd_assoc( | |
838 | struct t10_vpd *vpd, | |
839 | unsigned char *p_buf, | |
840 | int p_buf_len) | |
841 | { | |
842 | unsigned char buf[VPD_TMP_BUF_SIZE]; | |
e3d6f909 AG |
843 | int ret = 0; |
844 | int len; | |
c66ac9db NB |
845 | |
846 | memset(buf, 0, VPD_TMP_BUF_SIZE); | |
847 | len = sprintf(buf, "T10 VPD Identifier Association: "); | |
848 | ||
849 | switch (vpd->association) { | |
850 | case 0x00: | |
851 | sprintf(buf+len, "addressed logical unit\n"); | |
852 | break; | |
853 | case 0x10: | |
854 | sprintf(buf+len, "target port\n"); | |
855 | break; | |
856 | case 0x20: | |
857 | sprintf(buf+len, "SCSI target device\n"); | |
858 | break; | |
859 | default: | |
860 | sprintf(buf+len, "Unknown 0x%02x\n", vpd->association); | |
e3d6f909 | 861 | ret = -EINVAL; |
c66ac9db NB |
862 | break; |
863 | } | |
864 | ||
865 | if (p_buf) | |
866 | strncpy(p_buf, buf, p_buf_len); | |
867 | else | |
6708bb27 | 868 | pr_debug("%s", buf); |
c66ac9db NB |
869 | |
870 | return ret; | |
871 | } | |
872 | ||
873 | int transport_set_vpd_assoc(struct t10_vpd *vpd, unsigned char *page_83) | |
874 | { | |
875 | /* | |
876 | * The VPD identification association.. | |
877 | * | |
878 | * from spc3r23.pdf Section 7.6.3.1 Table 297 | |
879 | */ | |
880 | vpd->association = (page_83[1] & 0x30); | |
881 | return transport_dump_vpd_assoc(vpd, NULL, 0); | |
882 | } | |
883 | EXPORT_SYMBOL(transport_set_vpd_assoc); | |
884 | ||
885 | int transport_dump_vpd_ident_type( | |
886 | struct t10_vpd *vpd, | |
887 | unsigned char *p_buf, | |
888 | int p_buf_len) | |
889 | { | |
890 | unsigned char buf[VPD_TMP_BUF_SIZE]; | |
e3d6f909 AG |
891 | int ret = 0; |
892 | int len; | |
c66ac9db NB |
893 | |
894 | memset(buf, 0, VPD_TMP_BUF_SIZE); | |
895 | len = sprintf(buf, "T10 VPD Identifier Type: "); | |
896 | ||
897 | switch (vpd->device_identifier_type) { | |
898 | case 0x00: | |
899 | sprintf(buf+len, "Vendor specific\n"); | |
900 | break; | |
901 | case 0x01: | |
902 | sprintf(buf+len, "T10 Vendor ID based\n"); | |
903 | break; | |
904 | case 0x02: | |
905 | sprintf(buf+len, "EUI-64 based\n"); | |
906 | break; | |
907 | case 0x03: | |
908 | sprintf(buf+len, "NAA\n"); | |
909 | break; | |
910 | case 0x04: | |
911 | sprintf(buf+len, "Relative target port identifier\n"); | |
912 | break; | |
913 | case 0x08: | |
914 | sprintf(buf+len, "SCSI name string\n"); | |
915 | break; | |
916 | default: | |
917 | sprintf(buf+len, "Unsupported: 0x%02x\n", | |
918 | vpd->device_identifier_type); | |
e3d6f909 | 919 | ret = -EINVAL; |
c66ac9db NB |
920 | break; |
921 | } | |
922 | ||
e3d6f909 AG |
923 | if (p_buf) { |
924 | if (p_buf_len < strlen(buf)+1) | |
925 | return -EINVAL; | |
c66ac9db | 926 | strncpy(p_buf, buf, p_buf_len); |
e3d6f909 | 927 | } else { |
6708bb27 | 928 | pr_debug("%s", buf); |
e3d6f909 | 929 | } |
c66ac9db NB |
930 | |
931 | return ret; | |
932 | } | |
933 | ||
934 | int transport_set_vpd_ident_type(struct t10_vpd *vpd, unsigned char *page_83) | |
935 | { | |
936 | /* | |
937 | * The VPD identifier type.. | |
938 | * | |
939 | * from spc3r23.pdf Section 7.6.3.1 Table 298 | |
940 | */ | |
941 | vpd->device_identifier_type = (page_83[1] & 0x0f); | |
942 | return transport_dump_vpd_ident_type(vpd, NULL, 0); | |
943 | } | |
944 | EXPORT_SYMBOL(transport_set_vpd_ident_type); | |
945 | ||
946 | int transport_dump_vpd_ident( | |
947 | struct t10_vpd *vpd, | |
948 | unsigned char *p_buf, | |
949 | int p_buf_len) | |
950 | { | |
951 | unsigned char buf[VPD_TMP_BUF_SIZE]; | |
952 | int ret = 0; | |
953 | ||
954 | memset(buf, 0, VPD_TMP_BUF_SIZE); | |
955 | ||
956 | switch (vpd->device_identifier_code_set) { | |
957 | case 0x01: /* Binary */ | |
703d641d DC |
958 | snprintf(buf, sizeof(buf), |
959 | "T10 VPD Binary Device Identifier: %s\n", | |
c66ac9db NB |
960 | &vpd->device_identifier[0]); |
961 | break; | |
962 | case 0x02: /* ASCII */ | |
703d641d DC |
963 | snprintf(buf, sizeof(buf), |
964 | "T10 VPD ASCII Device Identifier: %s\n", | |
c66ac9db NB |
965 | &vpd->device_identifier[0]); |
966 | break; | |
967 | case 0x03: /* UTF-8 */ | |
703d641d DC |
968 | snprintf(buf, sizeof(buf), |
969 | "T10 VPD UTF-8 Device Identifier: %s\n", | |
c66ac9db NB |
970 | &vpd->device_identifier[0]); |
971 | break; | |
972 | default: | |
973 | sprintf(buf, "T10 VPD Device Identifier encoding unsupported:" | |
974 | " 0x%02x", vpd->device_identifier_code_set); | |
e3d6f909 | 975 | ret = -EINVAL; |
c66ac9db NB |
976 | break; |
977 | } | |
978 | ||
979 | if (p_buf) | |
980 | strncpy(p_buf, buf, p_buf_len); | |
981 | else | |
6708bb27 | 982 | pr_debug("%s", buf); |
c66ac9db NB |
983 | |
984 | return ret; | |
985 | } | |
986 | ||
987 | int | |
988 | transport_set_vpd_ident(struct t10_vpd *vpd, unsigned char *page_83) | |
989 | { | |
990 | static const char hex_str[] = "0123456789abcdef"; | |
35d1efe8 | 991 | int j = 0, i = 4; /* offset to start of the identifier */ |
c66ac9db NB |
992 | |
993 | /* | |
994 | * The VPD Code Set (encoding) | |
995 | * | |
996 | * from spc3r23.pdf Section 7.6.3.1 Table 296 | |
997 | */ | |
998 | vpd->device_identifier_code_set = (page_83[0] & 0x0f); | |
999 | switch (vpd->device_identifier_code_set) { | |
1000 | case 0x01: /* Binary */ | |
1001 | vpd->device_identifier[j++] = | |
1002 | hex_str[vpd->device_identifier_type]; | |
1003 | while (i < (4 + page_83[3])) { | |
1004 | vpd->device_identifier[j++] = | |
1005 | hex_str[(page_83[i] & 0xf0) >> 4]; | |
1006 | vpd->device_identifier[j++] = | |
1007 | hex_str[page_83[i] & 0x0f]; | |
1008 | i++; | |
1009 | } | |
1010 | break; | |
1011 | case 0x02: /* ASCII */ | |
1012 | case 0x03: /* UTF-8 */ | |
1013 | while (i < (4 + page_83[3])) | |
1014 | vpd->device_identifier[j++] = page_83[i++]; | |
1015 | break; | |
1016 | default: | |
1017 | break; | |
1018 | } | |
1019 | ||
1020 | return transport_dump_vpd_ident(vpd, NULL, 0); | |
1021 | } | |
1022 | EXPORT_SYMBOL(transport_set_vpd_ident); | |
1023 | ||
de103c93 CH |
1024 | sense_reason_t |
1025 | target_cmd_size_check(struct se_cmd *cmd, unsigned int size) | |
9b3b8041 CH |
1026 | { |
1027 | struct se_device *dev = cmd->se_dev; | |
1028 | ||
1029 | if (cmd->unknown_data_length) { | |
1030 | cmd->data_length = size; | |
1031 | } else if (size != cmd->data_length) { | |
1032 | pr_warn("TARGET_CORE[%s]: Expected Transfer Length:" | |
1033 | " %u does not match SCSI CDB Length: %u for SAM Opcode:" | |
1034 | " 0x%02x\n", cmd->se_tfo->get_fabric_name(), | |
1035 | cmd->data_length, size, cmd->t_task_cdb[0]); | |
1036 | ||
9b3b8041 CH |
1037 | if (cmd->data_direction == DMA_TO_DEVICE) { |
1038 | pr_err("Rejecting underflow/overflow" | |
1039 | " WRITE data\n"); | |
de103c93 | 1040 | return TCM_INVALID_CDB_FIELD; |
9b3b8041 CH |
1041 | } |
1042 | /* | |
1043 | * Reject READ_* or WRITE_* with overflow/underflow for | |
1044 | * type SCF_SCSI_DATA_CDB. | |
1045 | */ | |
0fd97ccf | 1046 | if (dev->dev_attrib.block_size != 512) { |
9b3b8041 CH |
1047 | pr_err("Failing OVERFLOW/UNDERFLOW for LBA op" |
1048 | " CDB on non 512-byte sector setup subsystem" | |
1049 | " plugin: %s\n", dev->transport->name); | |
1050 | /* Returns CHECK_CONDITION + INVALID_CDB_FIELD */ | |
de103c93 | 1051 | return TCM_INVALID_CDB_FIELD; |
9b3b8041 | 1052 | } |
4c054ba6 NB |
1053 | /* |
1054 | * For the overflow case keep the existing fabric provided | |
1055 | * ->data_length. Otherwise for the underflow case, reset | |
1056 | * ->data_length to the smaller SCSI expected data transfer | |
1057 | * length. | |
1058 | */ | |
9b3b8041 CH |
1059 | if (size > cmd->data_length) { |
1060 | cmd->se_cmd_flags |= SCF_OVERFLOW_BIT; | |
1061 | cmd->residual_count = (size - cmd->data_length); | |
1062 | } else { | |
1063 | cmd->se_cmd_flags |= SCF_UNDERFLOW_BIT; | |
1064 | cmd->residual_count = (cmd->data_length - size); | |
4c054ba6 | 1065 | cmd->data_length = size; |
9b3b8041 | 1066 | } |
9b3b8041 CH |
1067 | } |
1068 | ||
1069 | return 0; | |
1070 | ||
9b3b8041 CH |
1071 | } |
1072 | ||
c66ac9db NB |
1073 | /* |
1074 | * Used by fabric modules containing a local struct se_cmd within their | |
1075 | * fabric dependent per I/O descriptor. | |
1076 | */ | |
1077 | void transport_init_se_cmd( | |
1078 | struct se_cmd *cmd, | |
1079 | struct target_core_fabric_ops *tfo, | |
1080 | struct se_session *se_sess, | |
1081 | u32 data_length, | |
1082 | int data_direction, | |
1083 | int task_attr, | |
1084 | unsigned char *sense_buffer) | |
1085 | { | |
5951146d AG |
1086 | INIT_LIST_HEAD(&cmd->se_lun_node); |
1087 | INIT_LIST_HEAD(&cmd->se_delayed_node); | |
07bde79a | 1088 | INIT_LIST_HEAD(&cmd->se_qf_node); |
a17f091d | 1089 | INIT_LIST_HEAD(&cmd->se_cmd_list); |
cf572a96 | 1090 | INIT_LIST_HEAD(&cmd->state_list); |
a1d8b49a AG |
1091 | init_completion(&cmd->transport_lun_fe_stop_comp); |
1092 | init_completion(&cmd->transport_lun_stop_comp); | |
1093 | init_completion(&cmd->t_transport_stop_comp); | |
a17f091d | 1094 | init_completion(&cmd->cmd_wait_comp); |
cf572a96 | 1095 | init_completion(&cmd->task_stop_comp); |
a1d8b49a | 1096 | spin_lock_init(&cmd->t_state_lock); |
7d680f3b | 1097 | cmd->transport_state = CMD_T_DEV_ACTIVE; |
c66ac9db NB |
1098 | |
1099 | cmd->se_tfo = tfo; | |
1100 | cmd->se_sess = se_sess; | |
1101 | cmd->data_length = data_length; | |
1102 | cmd->data_direction = data_direction; | |
1103 | cmd->sam_task_attr = task_attr; | |
1104 | cmd->sense_buffer = sense_buffer; | |
cf572a96 CH |
1105 | |
1106 | cmd->state_active = false; | |
c66ac9db NB |
1107 | } |
1108 | EXPORT_SYMBOL(transport_init_se_cmd); | |
1109 | ||
de103c93 CH |
1110 | static sense_reason_t |
1111 | transport_check_alloc_task_attr(struct se_cmd *cmd) | |
c66ac9db | 1112 | { |
019c4ca6 CH |
1113 | struct se_device *dev = cmd->se_dev; |
1114 | ||
c66ac9db NB |
1115 | /* |
1116 | * Check if SAM Task Attribute emulation is enabled for this | |
1117 | * struct se_device storage object | |
1118 | */ | |
019c4ca6 | 1119 | if (dev->transport->transport_type == TRANSPORT_PLUGIN_PHBA_PDEV) |
c66ac9db NB |
1120 | return 0; |
1121 | ||
e66ecd50 | 1122 | if (cmd->sam_task_attr == MSG_ACA_TAG) { |
6708bb27 | 1123 | pr_debug("SAM Task Attribute ACA" |
c66ac9db | 1124 | " emulation is not supported\n"); |
de103c93 | 1125 | return TCM_INVALID_CDB_FIELD; |
c66ac9db NB |
1126 | } |
1127 | /* | |
1128 | * Used to determine when ORDERED commands should go from | |
1129 | * Dormant to Active status. | |
1130 | */ | |
019c4ca6 | 1131 | cmd->se_ordered_id = atomic_inc_return(&dev->dev_ordered_id); |
c66ac9db | 1132 | smp_mb__after_atomic_inc(); |
6708bb27 | 1133 | pr_debug("Allocated se_ordered_id: %u for Task Attr: 0x%02x on %s\n", |
c66ac9db | 1134 | cmd->se_ordered_id, cmd->sam_task_attr, |
019c4ca6 | 1135 | dev->transport->name); |
c66ac9db NB |
1136 | return 0; |
1137 | } | |
1138 | ||
de103c93 CH |
1139 | sense_reason_t |
1140 | target_setup_cmd_from_cdb(struct se_cmd *cmd, unsigned char *cdb) | |
c66ac9db | 1141 | { |
0fd97ccf | 1142 | struct se_device *dev = cmd->se_dev; |
de103c93 | 1143 | sense_reason_t ret; |
c66ac9db | 1144 | |
c66ac9db NB |
1145 | /* |
1146 | * Ensure that the received CDB is less than the max (252 + 8) bytes | |
1147 | * for VARIABLE_LENGTH_CMD | |
1148 | */ | |
1149 | if (scsi_command_size(cdb) > SCSI_MAX_VARLEN_CDB_SIZE) { | |
6708bb27 | 1150 | pr_err("Received SCSI CDB with command_size: %d that" |
c66ac9db NB |
1151 | " exceeds SCSI_MAX_VARLEN_CDB_SIZE: %d\n", |
1152 | scsi_command_size(cdb), SCSI_MAX_VARLEN_CDB_SIZE); | |
de103c93 | 1153 | return TCM_INVALID_CDB_FIELD; |
c66ac9db NB |
1154 | } |
1155 | /* | |
1156 | * If the received CDB is larger than TCM_MAX_COMMAND_SIZE, | |
1157 | * allocate the additional extended CDB buffer now.. Otherwise | |
1158 | * setup the pointer from __t_task_cdb to t_task_cdb. | |
1159 | */ | |
a1d8b49a AG |
1160 | if (scsi_command_size(cdb) > sizeof(cmd->__t_task_cdb)) { |
1161 | cmd->t_task_cdb = kzalloc(scsi_command_size(cdb), | |
c66ac9db | 1162 | GFP_KERNEL); |
6708bb27 AG |
1163 | if (!cmd->t_task_cdb) { |
1164 | pr_err("Unable to allocate cmd->t_task_cdb" | |
a1d8b49a | 1165 | " %u > sizeof(cmd->__t_task_cdb): %lu ops\n", |
c66ac9db | 1166 | scsi_command_size(cdb), |
a1d8b49a | 1167 | (unsigned long)sizeof(cmd->__t_task_cdb)); |
de103c93 | 1168 | return TCM_OUT_OF_RESOURCES; |
c66ac9db NB |
1169 | } |
1170 | } else | |
a1d8b49a | 1171 | cmd->t_task_cdb = &cmd->__t_task_cdb[0]; |
c66ac9db | 1172 | /* |
a1d8b49a | 1173 | * Copy the original CDB into cmd-> |
c66ac9db | 1174 | */ |
a1d8b49a | 1175 | memcpy(cmd->t_task_cdb, cdb, scsi_command_size(cdb)); |
cb4f4d3c | 1176 | |
e5c0d6ad RD |
1177 | trace_target_sequencer_start(cmd); |
1178 | ||
cb4f4d3c CH |
1179 | /* |
1180 | * Check for an existing UNIT ATTENTION condition | |
1181 | */ | |
de103c93 CH |
1182 | ret = target_scsi3_ua_check(cmd); |
1183 | if (ret) | |
1184 | return ret; | |
cb4f4d3c | 1185 | |
c87fbd56 | 1186 | ret = target_alua_state_check(cmd); |
de103c93 CH |
1187 | if (ret) |
1188 | return ret; | |
cb4f4d3c | 1189 | |
d977f437 | 1190 | ret = target_check_reservation(cmd); |
f85eda8d NB |
1191 | if (ret) { |
1192 | cmd->scsi_status = SAM_STAT_RESERVATION_CONFLICT; | |
d977f437 | 1193 | return ret; |
f85eda8d | 1194 | } |
cb4f4d3c | 1195 | |
0fd97ccf | 1196 | ret = dev->transport->parse_cdb(cmd); |
de103c93 CH |
1197 | if (ret) |
1198 | return ret; | |
1199 | ||
1200 | ret = transport_check_alloc_task_attr(cmd); | |
1201 | if (ret) | |
c66ac9db | 1202 | return ret; |
cb4f4d3c | 1203 | |
cb4f4d3c | 1204 | cmd->se_cmd_flags |= SCF_SUPPORTED_SAM_OPCODE; |
cb4f4d3c | 1205 | |
c66ac9db NB |
1206 | spin_lock(&cmd->se_lun->lun_sep_lock); |
1207 | if (cmd->se_lun->lun_sep) | |
1208 | cmd->se_lun->lun_sep->sep_stats.cmd_pdus++; | |
1209 | spin_unlock(&cmd->se_lun->lun_sep_lock); | |
1210 | return 0; | |
1211 | } | |
a12f41f8 | 1212 | EXPORT_SYMBOL(target_setup_cmd_from_cdb); |
c66ac9db | 1213 | |
695434e1 NB |
1214 | /* |
1215 | * Used by fabric module frontends to queue tasks directly. | |
1216 | * Many only be used from process context only | |
1217 | */ | |
1218 | int transport_handle_cdb_direct( | |
1219 | struct se_cmd *cmd) | |
1220 | { | |
de103c93 | 1221 | sense_reason_t ret; |
dd8ae59d | 1222 | |
695434e1 NB |
1223 | if (!cmd->se_lun) { |
1224 | dump_stack(); | |
6708bb27 | 1225 | pr_err("cmd->se_lun is NULL\n"); |
695434e1 NB |
1226 | return -EINVAL; |
1227 | } | |
1228 | if (in_interrupt()) { | |
1229 | dump_stack(); | |
6708bb27 | 1230 | pr_err("transport_generic_handle_cdb cannot be called" |
695434e1 NB |
1231 | " from interrupt context\n"); |
1232 | return -EINVAL; | |
1233 | } | |
dd8ae59d | 1234 | /* |
af877292 CH |
1235 | * Set TRANSPORT_NEW_CMD state and CMD_T_ACTIVE to ensure that |
1236 | * outstanding descriptors are handled correctly during shutdown via | |
1237 | * transport_wait_for_tasks() | |
dd8ae59d NB |
1238 | * |
1239 | * Also, we don't take cmd->t_state_lock here as we only expect | |
1240 | * this to be called for initial descriptor submission. | |
1241 | */ | |
1242 | cmd->t_state = TRANSPORT_NEW_CMD; | |
7d680f3b CH |
1243 | cmd->transport_state |= CMD_T_ACTIVE; |
1244 | ||
dd8ae59d NB |
1245 | /* |
1246 | * transport_generic_new_cmd() is already handling QUEUE_FULL, | |
1247 | * so follow TRANSPORT_NEW_CMD processing thread context usage | |
1248 | * and call transport_generic_request_failure() if necessary.. | |
1249 | */ | |
1250 | ret = transport_generic_new_cmd(cmd); | |
de103c93 CH |
1251 | if (ret) |
1252 | transport_generic_request_failure(cmd, ret); | |
dd8ae59d | 1253 | return 0; |
695434e1 NB |
1254 | } |
1255 | EXPORT_SYMBOL(transport_handle_cdb_direct); | |
1256 | ||
de103c93 CH |
1257 | static sense_reason_t |
1258 | transport_generic_map_mem_to_cmd(struct se_cmd *cmd, struct scatterlist *sgl, | |
1259 | u32 sgl_count, struct scatterlist *sgl_bidi, u32 sgl_bidi_count) | |
1260 | { | |
1261 | if (!sgl || !sgl_count) | |
1262 | return 0; | |
1263 | ||
1264 | /* | |
1265 | * Reject SCSI data overflow with map_mem_to_cmd() as incoming | |
1266 | * scatterlists already have been set to follow what the fabric | |
1267 | * passes for the original expected data transfer length. | |
1268 | */ | |
1269 | if (cmd->se_cmd_flags & SCF_OVERFLOW_BIT) { | |
1270 | pr_warn("Rejecting SCSI DATA overflow for fabric using" | |
1271 | " SCF_PASSTHROUGH_SG_TO_MEM_NOALLOC\n"); | |
1272 | return TCM_INVALID_CDB_FIELD; | |
1273 | } | |
1274 | ||
1275 | cmd->t_data_sg = sgl; | |
1276 | cmd->t_data_nents = sgl_count; | |
1277 | ||
1278 | if (sgl_bidi && sgl_bidi_count) { | |
1279 | cmd->t_bidi_data_sg = sgl_bidi; | |
1280 | cmd->t_bidi_data_nents = sgl_bidi_count; | |
1281 | } | |
1282 | cmd->se_cmd_flags |= SCF_PASSTHROUGH_SG_TO_MEM_NOALLOC; | |
1283 | return 0; | |
1284 | } | |
1285 | ||
a026757f NB |
1286 | /* |
1287 | * target_submit_cmd_map_sgls - lookup unpacked lun and submit uninitialized | |
1288 | * se_cmd + use pre-allocated SGL memory. | |
a6360785 NB |
1289 | * |
1290 | * @se_cmd: command descriptor to submit | |
1291 | * @se_sess: associated se_sess for endpoint | |
1292 | * @cdb: pointer to SCSI CDB | |
1293 | * @sense: pointer to SCSI sense buffer | |
1294 | * @unpacked_lun: unpacked LUN to reference for struct se_lun | |
1295 | * @data_length: fabric expected data transfer length | |
1296 | * @task_addr: SAM task attribute | |
1297 | * @data_dir: DMA data direction | |
1298 | * @flags: flags for command submission from target_sc_flags_tables | |
a026757f NB |
1299 | * @sgl: struct scatterlist memory for unidirectional mapping |
1300 | * @sgl_count: scatterlist count for unidirectional mapping | |
1301 | * @sgl_bidi: struct scatterlist memory for bidirectional READ mapping | |
1302 | * @sgl_bidi_count: scatterlist count for bidirectional READ mapping | |
a6360785 | 1303 | * |
d6dfc868 RD |
1304 | * Returns non zero to signal active I/O shutdown failure. All other |
1305 | * setup exceptions will be returned as a SCSI CHECK_CONDITION response, | |
1306 | * but still return zero here. | |
1307 | * | |
a6360785 NB |
1308 | * This may only be called from process context, and also currently |
1309 | * assumes internal allocation of fabric payload buffer by target-core. | |
a026757f NB |
1310 | */ |
1311 | int target_submit_cmd_map_sgls(struct se_cmd *se_cmd, struct se_session *se_sess, | |
a6360785 | 1312 | unsigned char *cdb, unsigned char *sense, u32 unpacked_lun, |
a026757f NB |
1313 | u32 data_length, int task_attr, int data_dir, int flags, |
1314 | struct scatterlist *sgl, u32 sgl_count, | |
1315 | struct scatterlist *sgl_bidi, u32 sgl_bidi_count) | |
a6360785 NB |
1316 | { |
1317 | struct se_portal_group *se_tpg; | |
de103c93 CH |
1318 | sense_reason_t rc; |
1319 | int ret; | |
a6360785 NB |
1320 | |
1321 | se_tpg = se_sess->se_tpg; | |
1322 | BUG_ON(!se_tpg); | |
1323 | BUG_ON(se_cmd->se_tfo || se_cmd->se_sess); | |
1324 | BUG_ON(in_interrupt()); | |
1325 | /* | |
1326 | * Initialize se_cmd for target operation. From this point | |
1327 | * exceptions are handled by sending exception status via | |
1328 | * target_core_fabric_ops->queue_status() callback | |
1329 | */ | |
1330 | transport_init_se_cmd(se_cmd, se_tpg->se_tpg_tfo, se_sess, | |
1331 | data_length, data_dir, task_attr, sense); | |
b0d79946 SAS |
1332 | if (flags & TARGET_SCF_UNKNOWN_SIZE) |
1333 | se_cmd->unknown_data_length = 1; | |
a6360785 NB |
1334 | /* |
1335 | * Obtain struct se_cmd->cmd_kref reference and add new cmd to | |
1336 | * se_sess->sess_cmd_list. A second kref_get here is necessary | |
1337 | * for fabrics using TARGET_SCF_ACK_KREF that expect a second | |
1338 | * kref_put() to happen during fabric packet acknowledgement. | |
1339 | */ | |
de103c93 CH |
1340 | ret = target_get_sess_cmd(se_sess, se_cmd, (flags & TARGET_SCF_ACK_KREF)); |
1341 | if (ret) | |
1342 | return ret; | |
a6360785 NB |
1343 | /* |
1344 | * Signal bidirectional data payloads to target-core | |
1345 | */ | |
1346 | if (flags & TARGET_SCF_BIDI_OP) | |
1347 | se_cmd->se_cmd_flags |= SCF_BIDI; | |
1348 | /* | |
1349 | * Locate se_lun pointer and attach it to struct se_cmd | |
1350 | */ | |
de103c93 CH |
1351 | rc = transport_lookup_cmd_lun(se_cmd, unpacked_lun); |
1352 | if (rc) { | |
1353 | transport_send_check_condition_and_sense(se_cmd, rc, 0); | |
735703ca | 1354 | target_put_sess_cmd(se_sess, se_cmd); |
d6dfc868 | 1355 | return 0; |
735703ca | 1356 | } |
d6e0175c | 1357 | |
a12f41f8 | 1358 | rc = target_setup_cmd_from_cdb(se_cmd, cdb); |
735703ca | 1359 | if (rc != 0) { |
de103c93 | 1360 | transport_generic_request_failure(se_cmd, rc); |
d6dfc868 | 1361 | return 0; |
735703ca | 1362 | } |
a026757f NB |
1363 | /* |
1364 | * When a non zero sgl_count has been passed perform SGL passthrough | |
1365 | * mapping for pre-allocated fabric memory instead of having target | |
1366 | * core perform an internal SGL allocation.. | |
1367 | */ | |
1368 | if (sgl_count != 0) { | |
1369 | BUG_ON(!sgl); | |
1370 | ||
944981c7 NB |
1371 | /* |
1372 | * A work-around for tcm_loop as some userspace code via | |
1373 | * scsi-generic do not memset their associated read buffers, | |
1374 | * so go ahead and do that here for type non-data CDBs. Also | |
1375 | * note that this is currently guaranteed to be a single SGL | |
1376 | * for this case by target core in target_setup_cmd_from_cdb() | |
1377 | * -> transport_generic_cmd_sequencer(). | |
1378 | */ | |
1379 | if (!(se_cmd->se_cmd_flags & SCF_SCSI_DATA_CDB) && | |
1380 | se_cmd->data_direction == DMA_FROM_DEVICE) { | |
1381 | unsigned char *buf = NULL; | |
1382 | ||
1383 | if (sgl) | |
1384 | buf = kmap(sg_page(sgl)) + sgl->offset; | |
1385 | ||
1386 | if (buf) { | |
1387 | memset(buf, 0, sgl->length); | |
1388 | kunmap(sg_page(sgl)); | |
1389 | } | |
1390 | } | |
1391 | ||
a026757f NB |
1392 | rc = transport_generic_map_mem_to_cmd(se_cmd, sgl, sgl_count, |
1393 | sgl_bidi, sgl_bidi_count); | |
1394 | if (rc != 0) { | |
de103c93 | 1395 | transport_generic_request_failure(se_cmd, rc); |
a026757f NB |
1396 | return 0; |
1397 | } | |
1398 | } | |
11e319ed AG |
1399 | /* |
1400 | * Check if we need to delay processing because of ALUA | |
1401 | * Active/NonOptimized primary access state.. | |
1402 | */ | |
1403 | core_alua_check_nonop_delay(se_cmd); | |
1404 | ||
a6360785 | 1405 | transport_handle_cdb_direct(se_cmd); |
d6dfc868 | 1406 | return 0; |
a6360785 | 1407 | } |
a026757f NB |
1408 | EXPORT_SYMBOL(target_submit_cmd_map_sgls); |
1409 | ||
1410 | /* | |
1411 | * target_submit_cmd - lookup unpacked lun and submit uninitialized se_cmd | |
1412 | * | |
1413 | * @se_cmd: command descriptor to submit | |
1414 | * @se_sess: associated se_sess for endpoint | |
1415 | * @cdb: pointer to SCSI CDB | |
1416 | * @sense: pointer to SCSI sense buffer | |
1417 | * @unpacked_lun: unpacked LUN to reference for struct se_lun | |
1418 | * @data_length: fabric expected data transfer length | |
1419 | * @task_addr: SAM task attribute | |
1420 | * @data_dir: DMA data direction | |
1421 | * @flags: flags for command submission from target_sc_flags_tables | |
1422 | * | |
1423 | * Returns non zero to signal active I/O shutdown failure. All other | |
1424 | * setup exceptions will be returned as a SCSI CHECK_CONDITION response, | |
1425 | * but still return zero here. | |
1426 | * | |
1427 | * This may only be called from process context, and also currently | |
1428 | * assumes internal allocation of fabric payload buffer by target-core. | |
1429 | * | |
1430 | * It also assumes interal target core SGL memory allocation. | |
1431 | */ | |
1432 | int target_submit_cmd(struct se_cmd *se_cmd, struct se_session *se_sess, | |
1433 | unsigned char *cdb, unsigned char *sense, u32 unpacked_lun, | |
1434 | u32 data_length, int task_attr, int data_dir, int flags) | |
1435 | { | |
1436 | return target_submit_cmd_map_sgls(se_cmd, se_sess, cdb, sense, | |
1437 | unpacked_lun, data_length, task_attr, data_dir, | |
1438 | flags, NULL, 0, NULL, 0); | |
1439 | } | |
a6360785 NB |
1440 | EXPORT_SYMBOL(target_submit_cmd); |
1441 | ||
9f0d05c2 NB |
1442 | static void target_complete_tmr_failure(struct work_struct *work) |
1443 | { | |
1444 | struct se_cmd *se_cmd = container_of(work, struct se_cmd, work); | |
1445 | ||
1446 | se_cmd->se_tmr_req->response = TMR_LUN_DOES_NOT_EXIST; | |
1447 | se_cmd->se_tfo->queue_tm_rsp(se_cmd); | |
5a3b6fc0 RD |
1448 | |
1449 | transport_cmd_check_stop_to_fabric(se_cmd); | |
9f0d05c2 NB |
1450 | } |
1451 | ||
ea98d7f9 AG |
1452 | /** |
1453 | * target_submit_tmr - lookup unpacked lun and submit uninitialized se_cmd | |
1454 | * for TMR CDBs | |
1455 | * | |
1456 | * @se_cmd: command descriptor to submit | |
1457 | * @se_sess: associated se_sess for endpoint | |
1458 | * @sense: pointer to SCSI sense buffer | |
1459 | * @unpacked_lun: unpacked LUN to reference for struct se_lun | |
1460 | * @fabric_context: fabric context for TMR req | |
1461 | * @tm_type: Type of TM request | |
c0974f89 NB |
1462 | * @gfp: gfp type for caller |
1463 | * @tag: referenced task tag for TMR_ABORT_TASK | |
c7042cae | 1464 | * @flags: submit cmd flags |
ea98d7f9 AG |
1465 | * |
1466 | * Callable from all contexts. | |
1467 | **/ | |
1468 | ||
c7042cae | 1469 | int target_submit_tmr(struct se_cmd *se_cmd, struct se_session *se_sess, |
ea98d7f9 | 1470 | unsigned char *sense, u32 unpacked_lun, |
c0974f89 NB |
1471 | void *fabric_tmr_ptr, unsigned char tm_type, |
1472 | gfp_t gfp, unsigned int tag, int flags) | |
ea98d7f9 AG |
1473 | { |
1474 | struct se_portal_group *se_tpg; | |
1475 | int ret; | |
1476 | ||
1477 | se_tpg = se_sess->se_tpg; | |
1478 | BUG_ON(!se_tpg); | |
1479 | ||
1480 | transport_init_se_cmd(se_cmd, se_tpg->se_tpg_tfo, se_sess, | |
1481 | 0, DMA_NONE, MSG_SIMPLE_TAG, sense); | |
c7042cae NB |
1482 | /* |
1483 | * FIXME: Currently expect caller to handle se_cmd->se_tmr_req | |
1484 | * allocation failure. | |
1485 | */ | |
c0974f89 | 1486 | ret = core_tmr_alloc_req(se_cmd, fabric_tmr_ptr, tm_type, gfp); |
c7042cae NB |
1487 | if (ret < 0) |
1488 | return -ENOMEM; | |
ea98d7f9 | 1489 | |
c0974f89 NB |
1490 | if (tm_type == TMR_ABORT_TASK) |
1491 | se_cmd->se_tmr_req->ref_task_tag = tag; | |
1492 | ||
ea98d7f9 | 1493 | /* See target_submit_cmd for commentary */ |
bc187ea6 RD |
1494 | ret = target_get_sess_cmd(se_sess, se_cmd, (flags & TARGET_SCF_ACK_KREF)); |
1495 | if (ret) { | |
1496 | core_tmr_release_req(se_cmd->se_tmr_req); | |
1497 | return ret; | |
1498 | } | |
ea98d7f9 | 1499 | |
ea98d7f9 AG |
1500 | ret = transport_lookup_tmr_lun(se_cmd, unpacked_lun); |
1501 | if (ret) { | |
9f0d05c2 NB |
1502 | /* |
1503 | * For callback during failure handling, push this work off | |
1504 | * to process context with TMR_LUN_DOES_NOT_EXIST status. | |
1505 | */ | |
1506 | INIT_WORK(&se_cmd->work, target_complete_tmr_failure); | |
1507 | schedule_work(&se_cmd->work); | |
c7042cae | 1508 | return 0; |
ea98d7f9 AG |
1509 | } |
1510 | transport_generic_handle_tmr(se_cmd); | |
c7042cae | 1511 | return 0; |
ea98d7f9 AG |
1512 | } |
1513 | EXPORT_SYMBOL(target_submit_tmr); | |
1514 | ||
cdbb70bb | 1515 | /* |
cf572a96 | 1516 | * If the cmd is active, request it to be stopped and sleep until it |
cdbb70bb CH |
1517 | * has completed. |
1518 | */ | |
cf572a96 | 1519 | bool target_stop_cmd(struct se_cmd *cmd, unsigned long *flags) |
cdbb70bb | 1520 | { |
cdbb70bb CH |
1521 | bool was_active = false; |
1522 | ||
cf572a96 CH |
1523 | if (cmd->transport_state & CMD_T_BUSY) { |
1524 | cmd->transport_state |= CMD_T_REQUEST_STOP; | |
cdbb70bb CH |
1525 | spin_unlock_irqrestore(&cmd->t_state_lock, *flags); |
1526 | ||
cf572a96 CH |
1527 | pr_debug("cmd %p waiting to complete\n", cmd); |
1528 | wait_for_completion(&cmd->task_stop_comp); | |
1529 | pr_debug("cmd %p stopped successfully\n", cmd); | |
cdbb70bb CH |
1530 | |
1531 | spin_lock_irqsave(&cmd->t_state_lock, *flags); | |
cf572a96 CH |
1532 | cmd->transport_state &= ~CMD_T_REQUEST_STOP; |
1533 | cmd->transport_state &= ~CMD_T_BUSY; | |
cdbb70bb CH |
1534 | was_active = true; |
1535 | } | |
1536 | ||
cdbb70bb CH |
1537 | return was_active; |
1538 | } | |
1539 | ||
c66ac9db NB |
1540 | /* |
1541 | * Handle SAM-esque emulation for generic transport request failures. | |
1542 | */ | |
de103c93 CH |
1543 | void transport_generic_request_failure(struct se_cmd *cmd, |
1544 | sense_reason_t sense_reason) | |
c66ac9db | 1545 | { |
07bde79a NB |
1546 | int ret = 0; |
1547 | ||
6708bb27 | 1548 | pr_debug("-----[ Storage Engine Exception for cmd: %p ITT: 0x%08x" |
e3d6f909 | 1549 | " CDB: 0x%02x\n", cmd, cmd->se_tfo->get_task_tag(cmd), |
a1d8b49a | 1550 | cmd->t_task_cdb[0]); |
de103c93 | 1551 | pr_debug("-----[ i_state: %d t_state: %d sense_reason: %d\n", |
e3d6f909 | 1552 | cmd->se_tfo->get_cmd_state(cmd), |
de103c93 | 1553 | cmd->t_state, sense_reason); |
d43d6aea | 1554 | pr_debug("-----[ CMD_T_ACTIVE: %d CMD_T_STOP: %d CMD_T_SENT: %d\n", |
7d680f3b CH |
1555 | (cmd->transport_state & CMD_T_ACTIVE) != 0, |
1556 | (cmd->transport_state & CMD_T_STOP) != 0, | |
1557 | (cmd->transport_state & CMD_T_SENT) != 0); | |
c66ac9db | 1558 | |
c66ac9db NB |
1559 | /* |
1560 | * For SAM Task Attribute emulation for failed struct se_cmd | |
1561 | */ | |
019c4ca6 | 1562 | transport_complete_task_attr(cmd); |
c66ac9db | 1563 | |
de103c93 | 1564 | switch (sense_reason) { |
03e98c9e NB |
1565 | case TCM_NON_EXISTENT_LUN: |
1566 | case TCM_UNSUPPORTED_SCSI_OPCODE: | |
1567 | case TCM_INVALID_CDB_FIELD: | |
1568 | case TCM_INVALID_PARAMETER_LIST: | |
bb992e72 | 1569 | case TCM_PARAMETER_LIST_LENGTH_ERROR: |
03e98c9e NB |
1570 | case TCM_LOGICAL_UNIT_COMMUNICATION_FAILURE: |
1571 | case TCM_UNKNOWN_MODE_PAGE: | |
1572 | case TCM_WRITE_PROTECTED: | |
e2397c70 | 1573 | case TCM_ADDRESS_OUT_OF_RANGE: |
03e98c9e NB |
1574 | case TCM_CHECK_CONDITION_ABORT_CMD: |
1575 | case TCM_CHECK_CONDITION_UNIT_ATTENTION: | |
1576 | case TCM_CHECK_CONDITION_NOT_READY: | |
c66ac9db | 1577 | break; |
de103c93 CH |
1578 | case TCM_OUT_OF_RESOURCES: |
1579 | sense_reason = TCM_LOGICAL_UNIT_COMMUNICATION_FAILURE; | |
1580 | break; | |
03e98c9e | 1581 | case TCM_RESERVATION_CONFLICT: |
c66ac9db NB |
1582 | /* |
1583 | * No SENSE Data payload for this case, set SCSI Status | |
1584 | * and queue the response to $FABRIC_MOD. | |
1585 | * | |
1586 | * Uses linux/include/scsi/scsi.h SAM status codes defs | |
1587 | */ | |
1588 | cmd->scsi_status = SAM_STAT_RESERVATION_CONFLICT; | |
1589 | /* | |
1590 | * For UA Interlock Code 11b, a RESERVATION CONFLICT will | |
1591 | * establish a UNIT ATTENTION with PREVIOUS RESERVATION | |
1592 | * CONFLICT STATUS. | |
1593 | * | |
1594 | * See spc4r17, section 7.4.6 Control Mode Page, Table 349 | |
1595 | */ | |
e3d6f909 | 1596 | if (cmd->se_sess && |
0fd97ccf | 1597 | cmd->se_dev->dev_attrib.emulate_ua_intlck_ctrl == 2) |
e3d6f909 | 1598 | core_scsi3_ua_allocate(cmd->se_sess->se_node_acl, |
c66ac9db NB |
1599 | cmd->orig_fe_lun, 0x2C, |
1600 | ASCQ_2CH_PREVIOUS_RESERVATION_CONFLICT_STATUS); | |
1601 | ||
e5c0d6ad RD |
1602 | trace_target_cmd_complete(cmd); |
1603 | ret = cmd->se_tfo-> queue_status(cmd); | |
f147abb4 | 1604 | if (ret == -EAGAIN || ret == -ENOMEM) |
07bde79a | 1605 | goto queue_full; |
c66ac9db | 1606 | goto check_stop; |
c66ac9db | 1607 | default: |
6708bb27 | 1608 | pr_err("Unknown transport error for CDB 0x%02x: %d\n", |
de103c93 CH |
1609 | cmd->t_task_cdb[0], sense_reason); |
1610 | sense_reason = TCM_UNSUPPORTED_SCSI_OPCODE; | |
c66ac9db NB |
1611 | break; |
1612 | } | |
f3146437 | 1613 | |
de103c93 | 1614 | ret = transport_send_check_condition_and_sense(cmd, sense_reason, 0); |
03e98c9e NB |
1615 | if (ret == -EAGAIN || ret == -ENOMEM) |
1616 | goto queue_full; | |
07bde79a | 1617 | |
c66ac9db NB |
1618 | check_stop: |
1619 | transport_lun_remove_cmd(cmd); | |
6708bb27 | 1620 | if (!transport_cmd_check_stop_to_fabric(cmd)) |
c66ac9db | 1621 | ; |
07bde79a NB |
1622 | return; |
1623 | ||
1624 | queue_full: | |
e057f533 CH |
1625 | cmd->t_state = TRANSPORT_COMPLETE_QF_OK; |
1626 | transport_handle_queue_full(cmd, cmd->se_dev); | |
c66ac9db | 1627 | } |
2fbff127 | 1628 | EXPORT_SYMBOL(transport_generic_request_failure); |
c66ac9db | 1629 | |
5f41a31d | 1630 | static void __target_execute_cmd(struct se_cmd *cmd) |
c66ac9db | 1631 | { |
de103c93 | 1632 | sense_reason_t ret; |
5f41a31d | 1633 | |
de103c93 CH |
1634 | if (cmd->execute_cmd) { |
1635 | ret = cmd->execute_cmd(cmd); | |
1636 | if (ret) { | |
1637 | spin_lock_irq(&cmd->t_state_lock); | |
1638 | cmd->transport_state &= ~(CMD_T_BUSY|CMD_T_SENT); | |
1639 | spin_unlock_irq(&cmd->t_state_lock); | |
5f41a31d | 1640 | |
de103c93 CH |
1641 | transport_generic_request_failure(cmd, ret); |
1642 | } | |
5f41a31d CH |
1643 | } |
1644 | } | |
1645 | ||
019c4ca6 | 1646 | static bool target_handle_task_attr(struct se_cmd *cmd) |
5f41a31d CH |
1647 | { |
1648 | struct se_device *dev = cmd->se_dev; | |
1649 | ||
019c4ca6 CH |
1650 | if (dev->transport->transport_type == TRANSPORT_PLUGIN_PHBA_PDEV) |
1651 | return false; | |
5f41a31d | 1652 | |
c66ac9db | 1653 | /* |
25985edc | 1654 | * Check for the existence of HEAD_OF_QUEUE, and if true return 1 |
c66ac9db NB |
1655 | * to allow the passed struct se_cmd list of tasks to the front of the list. |
1656 | */ | |
5f41a31d CH |
1657 | switch (cmd->sam_task_attr) { |
1658 | case MSG_HEAD_TAG: | |
1659 | pr_debug("Added HEAD_OF_QUEUE for CDB: 0x%02x, " | |
1660 | "se_ordered_id: %u\n", | |
1661 | cmd->t_task_cdb[0], cmd->se_ordered_id); | |
019c4ca6 | 1662 | return false; |
5f41a31d CH |
1663 | case MSG_ORDERED_TAG: |
1664 | atomic_inc(&dev->dev_ordered_sync); | |
c66ac9db NB |
1665 | smp_mb__after_atomic_inc(); |
1666 | ||
5f41a31d CH |
1667 | pr_debug("Added ORDERED for CDB: 0x%02x to ordered list, " |
1668 | " se_ordered_id: %u\n", | |
1669 | cmd->t_task_cdb[0], cmd->se_ordered_id); | |
1670 | ||
c66ac9db | 1671 | /* |
5f41a31d CH |
1672 | * Execute an ORDERED command if no other older commands |
1673 | * exist that need to be completed first. | |
c66ac9db | 1674 | */ |
5f41a31d | 1675 | if (!atomic_read(&dev->simple_cmds)) |
019c4ca6 | 1676 | return false; |
5f41a31d CH |
1677 | break; |
1678 | default: | |
c66ac9db NB |
1679 | /* |
1680 | * For SIMPLE and UNTAGGED Task Attribute commands | |
1681 | */ | |
5f41a31d | 1682 | atomic_inc(&dev->simple_cmds); |
c66ac9db | 1683 | smp_mb__after_atomic_inc(); |
5f41a31d | 1684 | break; |
c66ac9db | 1685 | } |
5f41a31d | 1686 | |
019c4ca6 CH |
1687 | if (atomic_read(&dev->dev_ordered_sync) == 0) |
1688 | return false; | |
c66ac9db | 1689 | |
019c4ca6 CH |
1690 | spin_lock(&dev->delayed_cmd_lock); |
1691 | list_add_tail(&cmd->se_delayed_node, &dev->delayed_cmd_list); | |
1692 | spin_unlock(&dev->delayed_cmd_lock); | |
1693 | ||
1694 | pr_debug("Added CDB: 0x%02x Task Attr: 0x%02x to" | |
1695 | " delayed CMD list, se_ordered_id: %u\n", | |
1696 | cmd->t_task_cdb[0], cmd->sam_task_attr, | |
1697 | cmd->se_ordered_id); | |
1698 | return true; | |
1699 | } | |
1700 | ||
1701 | void target_execute_cmd(struct se_cmd *cmd) | |
1702 | { | |
1703 | /* | |
1704 | * If the received CDB has aleady been aborted stop processing it here. | |
1705 | */ | |
5bd665f2 LT |
1706 | if (transport_check_aborted_status(cmd, 1)) { |
1707 | complete(&cmd->transport_lun_stop_comp); | |
5f41a31d | 1708 | return; |
c66ac9db | 1709 | } |
c66ac9db | 1710 | |
c66ac9db | 1711 | /* |
019c4ca6 CH |
1712 | * Determine if IOCTL context caller in requesting the stopping of this |
1713 | * command for LUN shutdown purposes. | |
c66ac9db | 1714 | */ |
019c4ca6 CH |
1715 | spin_lock_irq(&cmd->t_state_lock); |
1716 | if (cmd->transport_state & CMD_T_LUN_STOP) { | |
1717 | pr_debug("%s:%d CMD_T_LUN_STOP for ITT: 0x%08x\n", | |
1718 | __func__, __LINE__, cmd->se_tfo->get_task_tag(cmd)); | |
1719 | ||
1720 | cmd->transport_state &= ~CMD_T_ACTIVE; | |
1721 | spin_unlock_irq(&cmd->t_state_lock); | |
1722 | complete(&cmd->transport_lun_stop_comp); | |
1723 | return; | |
1724 | } | |
1725 | /* | |
1726 | * Determine if frontend context caller is requesting the stopping of | |
1727 | * this command for frontend exceptions. | |
1728 | */ | |
1729 | if (cmd->transport_state & CMD_T_STOP) { | |
1730 | pr_debug("%s:%d CMD_T_STOP for ITT: 0x%08x\n", | |
1731 | __func__, __LINE__, | |
1732 | cmd->se_tfo->get_task_tag(cmd)); | |
1733 | ||
1734 | spin_unlock_irq(&cmd->t_state_lock); | |
1735 | complete(&cmd->t_transport_stop_comp); | |
1736 | return; | |
1737 | } | |
1738 | ||
1739 | cmd->t_state = TRANSPORT_PROCESSING; | |
1a398b97 | 1740 | cmd->transport_state |= CMD_T_ACTIVE|CMD_T_BUSY|CMD_T_SENT; |
019c4ca6 CH |
1741 | spin_unlock_irq(&cmd->t_state_lock); |
1742 | ||
1a398b97 NB |
1743 | if (target_handle_task_attr(cmd)) { |
1744 | spin_lock_irq(&cmd->t_state_lock); | |
1745 | cmd->transport_state &= ~CMD_T_BUSY|CMD_T_SENT; | |
1746 | spin_unlock_irq(&cmd->t_state_lock); | |
1747 | return; | |
1748 | } | |
1749 | ||
1750 | __target_execute_cmd(cmd); | |
c66ac9db | 1751 | } |
70baf0ab | 1752 | EXPORT_SYMBOL(target_execute_cmd); |
c66ac9db | 1753 | |
5f41a31d CH |
1754 | /* |
1755 | * Process all commands up to the last received ORDERED task attribute which | |
1756 | * requires another blocking boundary | |
1757 | */ | |
1758 | static void target_restart_delayed_cmds(struct se_device *dev) | |
1759 | { | |
1760 | for (;;) { | |
1761 | struct se_cmd *cmd; | |
1762 | ||
1763 | spin_lock(&dev->delayed_cmd_lock); | |
1764 | if (list_empty(&dev->delayed_cmd_list)) { | |
1765 | spin_unlock(&dev->delayed_cmd_lock); | |
1766 | break; | |
1767 | } | |
1768 | ||
1769 | cmd = list_entry(dev->delayed_cmd_list.next, | |
1770 | struct se_cmd, se_delayed_node); | |
1771 | list_del(&cmd->se_delayed_node); | |
1772 | spin_unlock(&dev->delayed_cmd_lock); | |
1773 | ||
1774 | __target_execute_cmd(cmd); | |
1775 | ||
1776 | if (cmd->sam_task_attr == MSG_ORDERED_TAG) | |
1777 | break; | |
1778 | } | |
1779 | } | |
1780 | ||
c66ac9db | 1781 | /* |
35e0e757 | 1782 | * Called from I/O completion to determine which dormant/delayed |
c66ac9db NB |
1783 | * and ordered cmds need to have their tasks added to the execution queue. |
1784 | */ | |
1785 | static void transport_complete_task_attr(struct se_cmd *cmd) | |
1786 | { | |
5951146d | 1787 | struct se_device *dev = cmd->se_dev; |
c66ac9db | 1788 | |
019c4ca6 CH |
1789 | if (dev->transport->transport_type == TRANSPORT_PLUGIN_PHBA_PDEV) |
1790 | return; | |
1791 | ||
e66ecd50 | 1792 | if (cmd->sam_task_attr == MSG_SIMPLE_TAG) { |
c66ac9db NB |
1793 | atomic_dec(&dev->simple_cmds); |
1794 | smp_mb__after_atomic_dec(); | |
1795 | dev->dev_cur_ordered_id++; | |
6708bb27 | 1796 | pr_debug("Incremented dev->dev_cur_ordered_id: %u for" |
c66ac9db NB |
1797 | " SIMPLE: %u\n", dev->dev_cur_ordered_id, |
1798 | cmd->se_ordered_id); | |
e66ecd50 | 1799 | } else if (cmd->sam_task_attr == MSG_HEAD_TAG) { |
c66ac9db | 1800 | dev->dev_cur_ordered_id++; |
6708bb27 | 1801 | pr_debug("Incremented dev_cur_ordered_id: %u for" |
c66ac9db NB |
1802 | " HEAD_OF_QUEUE: %u\n", dev->dev_cur_ordered_id, |
1803 | cmd->se_ordered_id); | |
e66ecd50 | 1804 | } else if (cmd->sam_task_attr == MSG_ORDERED_TAG) { |
c66ac9db NB |
1805 | atomic_dec(&dev->dev_ordered_sync); |
1806 | smp_mb__after_atomic_dec(); | |
c66ac9db NB |
1807 | |
1808 | dev->dev_cur_ordered_id++; | |
6708bb27 | 1809 | pr_debug("Incremented dev_cur_ordered_id: %u for ORDERED:" |
c66ac9db NB |
1810 | " %u\n", dev->dev_cur_ordered_id, cmd->se_ordered_id); |
1811 | } | |
c66ac9db | 1812 | |
5f41a31d | 1813 | target_restart_delayed_cmds(dev); |
c66ac9db NB |
1814 | } |
1815 | ||
e057f533 | 1816 | static void transport_complete_qf(struct se_cmd *cmd) |
07bde79a NB |
1817 | { |
1818 | int ret = 0; | |
1819 | ||
019c4ca6 | 1820 | transport_complete_task_attr(cmd); |
e057f533 CH |
1821 | |
1822 | if (cmd->se_cmd_flags & SCF_TRANSPORT_TASK_SENSE) { | |
e5c0d6ad | 1823 | trace_target_cmd_complete(cmd); |
e057f533 CH |
1824 | ret = cmd->se_tfo->queue_status(cmd); |
1825 | if (ret) | |
1826 | goto out; | |
1827 | } | |
07bde79a NB |
1828 | |
1829 | switch (cmd->data_direction) { | |
1830 | case DMA_FROM_DEVICE: | |
e5c0d6ad | 1831 | trace_target_cmd_complete(cmd); |
07bde79a NB |
1832 | ret = cmd->se_tfo->queue_data_in(cmd); |
1833 | break; | |
1834 | case DMA_TO_DEVICE: | |
ec98f782 | 1835 | if (cmd->t_bidi_data_sg) { |
07bde79a NB |
1836 | ret = cmd->se_tfo->queue_data_in(cmd); |
1837 | if (ret < 0) | |
e057f533 | 1838 | break; |
07bde79a NB |
1839 | } |
1840 | /* Fall through for DMA_TO_DEVICE */ | |
1841 | case DMA_NONE: | |
e5c0d6ad | 1842 | trace_target_cmd_complete(cmd); |
07bde79a NB |
1843 | ret = cmd->se_tfo->queue_status(cmd); |
1844 | break; | |
1845 | default: | |
1846 | break; | |
1847 | } | |
1848 | ||
e057f533 CH |
1849 | out: |
1850 | if (ret < 0) { | |
1851 | transport_handle_queue_full(cmd, cmd->se_dev); | |
1852 | return; | |
1853 | } | |
1854 | transport_lun_remove_cmd(cmd); | |
1855 | transport_cmd_check_stop_to_fabric(cmd); | |
07bde79a NB |
1856 | } |
1857 | ||
1858 | static void transport_handle_queue_full( | |
1859 | struct se_cmd *cmd, | |
e057f533 | 1860 | struct se_device *dev) |
07bde79a NB |
1861 | { |
1862 | spin_lock_irq(&dev->qf_cmd_lock); | |
07bde79a NB |
1863 | list_add_tail(&cmd->se_qf_node, &cmd->se_dev->qf_cmd_list); |
1864 | atomic_inc(&dev->dev_qf_count); | |
1865 | smp_mb__after_atomic_inc(); | |
1866 | spin_unlock_irq(&cmd->se_dev->qf_cmd_lock); | |
1867 | ||
1868 | schedule_work(&cmd->se_dev->qf_work_queue); | |
1869 | } | |
1870 | ||
35e0e757 | 1871 | static void target_complete_ok_work(struct work_struct *work) |
c66ac9db | 1872 | { |
35e0e757 | 1873 | struct se_cmd *cmd = container_of(work, struct se_cmd, work); |
27a27099 | 1874 | int ret; |
35e0e757 | 1875 | |
c66ac9db NB |
1876 | /* |
1877 | * Check if we need to move delayed/dormant tasks from cmds on the | |
1878 | * delayed execution list after a HEAD_OF_QUEUE or ORDERED Task | |
1879 | * Attribute. | |
1880 | */ | |
019c4ca6 CH |
1881 | transport_complete_task_attr(cmd); |
1882 | ||
07bde79a NB |
1883 | /* |
1884 | * Check to schedule QUEUE_FULL work, or execute an existing | |
1885 | * cmd->transport_qf_callback() | |
1886 | */ | |
1887 | if (atomic_read(&cmd->se_dev->dev_qf_count) != 0) | |
1888 | schedule_work(&cmd->se_dev->qf_work_queue); | |
1889 | ||
c66ac9db | 1890 | /* |
d5829eac | 1891 | * Check if we need to send a sense buffer from |
c66ac9db NB |
1892 | * the struct se_cmd in question. |
1893 | */ | |
1894 | if (cmd->se_cmd_flags & SCF_TRANSPORT_TASK_SENSE) { | |
27a27099 | 1895 | WARN_ON(!cmd->scsi_status); |
27a27099 PB |
1896 | ret = transport_send_check_condition_and_sense( |
1897 | cmd, 0, 1); | |
1898 | if (ret == -EAGAIN || ret == -ENOMEM) | |
1899 | goto queue_full; | |
1900 | ||
1901 | transport_lun_remove_cmd(cmd); | |
1902 | transport_cmd_check_stop_to_fabric(cmd); | |
1903 | return; | |
c66ac9db NB |
1904 | } |
1905 | /* | |
25985edc | 1906 | * Check for a callback, used by amongst other things |
c66ac9db NB |
1907 | * XDWRITE_READ_10 emulation. |
1908 | */ | |
1909 | if (cmd->transport_complete_callback) | |
1910 | cmd->transport_complete_callback(cmd); | |
1911 | ||
1912 | switch (cmd->data_direction) { | |
1913 | case DMA_FROM_DEVICE: | |
1914 | spin_lock(&cmd->se_lun->lun_sep_lock); | |
e3d6f909 AG |
1915 | if (cmd->se_lun->lun_sep) { |
1916 | cmd->se_lun->lun_sep->sep_stats.tx_data_octets += | |
c66ac9db NB |
1917 | cmd->data_length; |
1918 | } | |
1919 | spin_unlock(&cmd->se_lun->lun_sep_lock); | |
c66ac9db | 1920 | |
e5c0d6ad | 1921 | trace_target_cmd_complete(cmd); |
07bde79a | 1922 | ret = cmd->se_tfo->queue_data_in(cmd); |
f147abb4 | 1923 | if (ret == -EAGAIN || ret == -ENOMEM) |
07bde79a | 1924 | goto queue_full; |
c66ac9db NB |
1925 | break; |
1926 | case DMA_TO_DEVICE: | |
1927 | spin_lock(&cmd->se_lun->lun_sep_lock); | |
e3d6f909 AG |
1928 | if (cmd->se_lun->lun_sep) { |
1929 | cmd->se_lun->lun_sep->sep_stats.rx_data_octets += | |
c66ac9db NB |
1930 | cmd->data_length; |
1931 | } | |
1932 | spin_unlock(&cmd->se_lun->lun_sep_lock); | |
1933 | /* | |
1934 | * Check if we need to send READ payload for BIDI-COMMAND | |
1935 | */ | |
ec98f782 | 1936 | if (cmd->t_bidi_data_sg) { |
c66ac9db | 1937 | spin_lock(&cmd->se_lun->lun_sep_lock); |
e3d6f909 AG |
1938 | if (cmd->se_lun->lun_sep) { |
1939 | cmd->se_lun->lun_sep->sep_stats.tx_data_octets += | |
c66ac9db NB |
1940 | cmd->data_length; |
1941 | } | |
1942 | spin_unlock(&cmd->se_lun->lun_sep_lock); | |
07bde79a | 1943 | ret = cmd->se_tfo->queue_data_in(cmd); |
f147abb4 | 1944 | if (ret == -EAGAIN || ret == -ENOMEM) |
07bde79a | 1945 | goto queue_full; |
c66ac9db NB |
1946 | break; |
1947 | } | |
1948 | /* Fall through for DMA_TO_DEVICE */ | |
1949 | case DMA_NONE: | |
e5c0d6ad | 1950 | trace_target_cmd_complete(cmd); |
07bde79a | 1951 | ret = cmd->se_tfo->queue_status(cmd); |
f147abb4 | 1952 | if (ret == -EAGAIN || ret == -ENOMEM) |
07bde79a | 1953 | goto queue_full; |
c66ac9db NB |
1954 | break; |
1955 | default: | |
1956 | break; | |
1957 | } | |
1958 | ||
1959 | transport_lun_remove_cmd(cmd); | |
1960 | transport_cmd_check_stop_to_fabric(cmd); | |
07bde79a NB |
1961 | return; |
1962 | ||
1963 | queue_full: | |
6708bb27 | 1964 | pr_debug("Handling complete_ok QUEUE_FULL: se_cmd: %p," |
07bde79a | 1965 | " data_direction: %d\n", cmd, cmd->data_direction); |
e057f533 CH |
1966 | cmd->t_state = TRANSPORT_COMPLETE_QF_OK; |
1967 | transport_handle_queue_full(cmd, cmd->se_dev); | |
c66ac9db NB |
1968 | } |
1969 | ||
6708bb27 | 1970 | static inline void transport_free_sgl(struct scatterlist *sgl, int nents) |
c66ac9db | 1971 | { |
ec98f782 | 1972 | struct scatterlist *sg; |
ec98f782 | 1973 | int count; |
c66ac9db | 1974 | |
6708bb27 AG |
1975 | for_each_sg(sgl, sg, nents, count) |
1976 | __free_page(sg_page(sg)); | |
c66ac9db | 1977 | |
6708bb27 AG |
1978 | kfree(sgl); |
1979 | } | |
c66ac9db | 1980 | |
6708bb27 AG |
1981 | static inline void transport_free_pages(struct se_cmd *cmd) |
1982 | { | |
1983 | if (cmd->se_cmd_flags & SCF_PASSTHROUGH_SG_TO_MEM_NOALLOC) | |
1984 | return; | |
1985 | ||
1986 | transport_free_sgl(cmd->t_data_sg, cmd->t_data_nents); | |
ec98f782 AG |
1987 | cmd->t_data_sg = NULL; |
1988 | cmd->t_data_nents = 0; | |
c66ac9db | 1989 | |
6708bb27 | 1990 | transport_free_sgl(cmd->t_bidi_data_sg, cmd->t_bidi_data_nents); |
ec98f782 AG |
1991 | cmd->t_bidi_data_sg = NULL; |
1992 | cmd->t_bidi_data_nents = 0; | |
c66ac9db NB |
1993 | } |
1994 | ||
e26d99ae CH |
1995 | /** |
1996 | * transport_release_cmd - free a command | |
1997 | * @cmd: command to free | |
1998 | * | |
1999 | * This routine unconditionally frees a command, and reference counting | |
2000 | * or list removal must be done in the caller. | |
2001 | */ | |
d5ddad41 | 2002 | static int transport_release_cmd(struct se_cmd *cmd) |
e26d99ae CH |
2003 | { |
2004 | BUG_ON(!cmd->se_tfo); | |
2005 | ||
c8e31f26 | 2006 | if (cmd->se_cmd_flags & SCF_SCSI_TMR_CDB) |
e26d99ae CH |
2007 | core_tmr_release_req(cmd->se_tmr_req); |
2008 | if (cmd->t_task_cdb != cmd->__t_task_cdb) | |
2009 | kfree(cmd->t_task_cdb); | |
2010 | /* | |
7481deb4 NB |
2011 | * If this cmd has been setup with target_get_sess_cmd(), drop |
2012 | * the kref and call ->release_cmd() in kref callback. | |
e26d99ae | 2013 | */ |
ca24976a | 2014 | return target_put_sess_cmd(cmd->se_sess, cmd); |
e26d99ae CH |
2015 | } |
2016 | ||
d3df7825 CH |
2017 | /** |
2018 | * transport_put_cmd - release a reference to a command | |
2019 | * @cmd: command to release | |
2020 | * | |
2021 | * This routine releases our reference to the command and frees it if possible. | |
2022 | */ | |
d5ddad41 | 2023 | static int transport_put_cmd(struct se_cmd *cmd) |
c66ac9db | 2024 | { |
c66ac9db | 2025 | transport_free_pages(cmd); |
d5ddad41 | 2026 | return transport_release_cmd(cmd); |
c66ac9db | 2027 | } |
c66ac9db | 2028 | |
4949314c | 2029 | void *transport_kmap_data_sg(struct se_cmd *cmd) |
05d1c7c0 | 2030 | { |
ec98f782 | 2031 | struct scatterlist *sg = cmd->t_data_sg; |
4949314c AG |
2032 | struct page **pages; |
2033 | int i; | |
05d1c7c0 AG |
2034 | |
2035 | /* | |
ec98f782 AG |
2036 | * We need to take into account a possible offset here for fabrics like |
2037 | * tcm_loop who may be using a contig buffer from the SCSI midlayer for | |
2038 | * control CDBs passed as SGLs via transport_generic_map_mem_to_cmd() | |
05d1c7c0 | 2039 | */ |
4949314c AG |
2040 | if (!cmd->t_data_nents) |
2041 | return NULL; | |
3717ef0c PB |
2042 | |
2043 | BUG_ON(!sg); | |
2044 | if (cmd->t_data_nents == 1) | |
4949314c AG |
2045 | return kmap(sg_page(sg)) + sg->offset; |
2046 | ||
2047 | /* >1 page. use vmap */ | |
2048 | pages = kmalloc(sizeof(*pages) * cmd->t_data_nents, GFP_KERNEL); | |
de103c93 | 2049 | if (!pages) |
4949314c AG |
2050 | return NULL; |
2051 | ||
2052 | /* convert sg[] to pages[] */ | |
2053 | for_each_sg(cmd->t_data_sg, sg, cmd->t_data_nents, i) { | |
2054 | pages[i] = sg_page(sg); | |
2055 | } | |
2056 | ||
2057 | cmd->t_data_vmap = vmap(pages, cmd->t_data_nents, VM_MAP, PAGE_KERNEL); | |
2058 | kfree(pages); | |
de103c93 | 2059 | if (!cmd->t_data_vmap) |
4949314c AG |
2060 | return NULL; |
2061 | ||
2062 | return cmd->t_data_vmap + cmd->t_data_sg[0].offset; | |
05d1c7c0 | 2063 | } |
4949314c | 2064 | EXPORT_SYMBOL(transport_kmap_data_sg); |
05d1c7c0 | 2065 | |
4949314c | 2066 | void transport_kunmap_data_sg(struct se_cmd *cmd) |
05d1c7c0 | 2067 | { |
a1edf9cf | 2068 | if (!cmd->t_data_nents) { |
4949314c | 2069 | return; |
a1edf9cf | 2070 | } else if (cmd->t_data_nents == 1) { |
4949314c | 2071 | kunmap(sg_page(cmd->t_data_sg)); |
a1edf9cf AG |
2072 | return; |
2073 | } | |
4949314c AG |
2074 | |
2075 | vunmap(cmd->t_data_vmap); | |
2076 | cmd->t_data_vmap = NULL; | |
05d1c7c0 | 2077 | } |
4949314c | 2078 | EXPORT_SYMBOL(transport_kunmap_data_sg); |
05d1c7c0 | 2079 | |
c66ac9db | 2080 | static int |
05d1c7c0 | 2081 | transport_generic_get_mem(struct se_cmd *cmd) |
c66ac9db | 2082 | { |
ec98f782 AG |
2083 | u32 length = cmd->data_length; |
2084 | unsigned int nents; | |
2085 | struct page *page; | |
9db9da33 | 2086 | gfp_t zero_flag; |
ec98f782 | 2087 | int i = 0; |
c66ac9db | 2088 | |
ec98f782 AG |
2089 | nents = DIV_ROUND_UP(length, PAGE_SIZE); |
2090 | cmd->t_data_sg = kmalloc(sizeof(struct scatterlist) * nents, GFP_KERNEL); | |
2091 | if (!cmd->t_data_sg) | |
2092 | return -ENOMEM; | |
c66ac9db | 2093 | |
ec98f782 AG |
2094 | cmd->t_data_nents = nents; |
2095 | sg_init_table(cmd->t_data_sg, nents); | |
c66ac9db | 2096 | |
64f1db38 | 2097 | zero_flag = cmd->se_cmd_flags & SCF_SCSI_DATA_CDB ? 0 : __GFP_ZERO; |
9db9da33 | 2098 | |
ec98f782 AG |
2099 | while (length) { |
2100 | u32 page_len = min_t(u32, length, PAGE_SIZE); | |
9db9da33 | 2101 | page = alloc_page(GFP_KERNEL | zero_flag); |
ec98f782 AG |
2102 | if (!page) |
2103 | goto out; | |
c66ac9db | 2104 | |
ec98f782 AG |
2105 | sg_set_page(&cmd->t_data_sg[i], page, page_len, 0); |
2106 | length -= page_len; | |
2107 | i++; | |
c66ac9db | 2108 | } |
c66ac9db | 2109 | return 0; |
c66ac9db | 2110 | |
ec98f782 | 2111 | out: |
d0e27c88 | 2112 | while (i > 0) { |
ec98f782 | 2113 | i--; |
d0e27c88 | 2114 | __free_page(sg_page(&cmd->t_data_sg[i])); |
c66ac9db | 2115 | } |
ec98f782 AG |
2116 | kfree(cmd->t_data_sg); |
2117 | cmd->t_data_sg = NULL; | |
2118 | return -ENOMEM; | |
c66ac9db NB |
2119 | } |
2120 | ||
da0f7619 | 2121 | /* |
b16a35b0 AG |
2122 | * Allocate any required resources to execute the command. For writes we |
2123 | * might not have the payload yet, so notify the fabric via a call to | |
2124 | * ->write_pending instead. Otherwise place it on the execution queue. | |
c66ac9db | 2125 | */ |
de103c93 CH |
2126 | sense_reason_t |
2127 | transport_generic_new_cmd(struct se_cmd *cmd) | |
c66ac9db | 2128 | { |
c66ac9db NB |
2129 | int ret = 0; |
2130 | ||
2131 | /* | |
2132 | * Determine is the TCM fabric module has already allocated physical | |
2133 | * memory, and is directly calling transport_generic_map_mem_to_cmd() | |
ec98f782 | 2134 | * beforehand. |
c66ac9db | 2135 | */ |
ec98f782 AG |
2136 | if (!(cmd->se_cmd_flags & SCF_PASSTHROUGH_SG_TO_MEM_NOALLOC) && |
2137 | cmd->data_length) { | |
05d1c7c0 | 2138 | ret = transport_generic_get_mem(cmd); |
c66ac9db | 2139 | if (ret < 0) |
de103c93 | 2140 | return TCM_LOGICAL_UNIT_COMMUNICATION_FAILURE; |
c66ac9db | 2141 | } |
c66ac9db | 2142 | /* |
c3196f0c CH |
2143 | * If this command is not a write we can execute it right here, |
2144 | * for write buffers we need to notify the fabric driver first | |
2145 | * and let it call back once the write buffers are ready. | |
c66ac9db | 2146 | */ |
5f41a31d | 2147 | target_add_to_state_list(cmd); |
c3196f0c CH |
2148 | if (cmd->data_direction != DMA_TO_DEVICE) { |
2149 | target_execute_cmd(cmd); | |
2150 | return 0; | |
2151 | } | |
862e6389 | 2152 | transport_cmd_check_stop(cmd, false, true); |
c3196f0c CH |
2153 | |
2154 | ret = cmd->se_tfo->write_pending(cmd); | |
2155 | if (ret == -EAGAIN || ret == -ENOMEM) | |
2156 | goto queue_full; | |
2157 | ||
de103c93 CH |
2158 | /* fabric drivers should only return -EAGAIN or -ENOMEM as error */ |
2159 | WARN_ON(ret); | |
2160 | ||
b69c1fcf | 2161 | return (!ret) ? 0 : TCM_LOGICAL_UNIT_COMMUNICATION_FAILURE; |
da0f7619 | 2162 | |
c3196f0c CH |
2163 | queue_full: |
2164 | pr_debug("Handling write_pending QUEUE__FULL: se_cmd: %p\n", cmd); | |
2165 | cmd->t_state = TRANSPORT_COMPLETE_QF_WP; | |
2166 | transport_handle_queue_full(cmd, cmd->se_dev); | |
2167 | return 0; | |
c66ac9db | 2168 | } |
a1d8b49a | 2169 | EXPORT_SYMBOL(transport_generic_new_cmd); |
c66ac9db | 2170 | |
e057f533 | 2171 | static void transport_write_pending_qf(struct se_cmd *cmd) |
07bde79a | 2172 | { |
f147abb4 NB |
2173 | int ret; |
2174 | ||
2175 | ret = cmd->se_tfo->write_pending(cmd); | |
2176 | if (ret == -EAGAIN || ret == -ENOMEM) { | |
e057f533 CH |
2177 | pr_debug("Handling write_pending QUEUE__FULL: se_cmd: %p\n", |
2178 | cmd); | |
2179 | transport_handle_queue_full(cmd, cmd->se_dev); | |
2180 | } | |
07bde79a NB |
2181 | } |
2182 | ||
d5ddad41 | 2183 | int transport_generic_free_cmd(struct se_cmd *cmd, int wait_for_tasks) |
c66ac9db | 2184 | { |
d5ddad41 NB |
2185 | int ret = 0; |
2186 | ||
d14921d6 | 2187 | if (!(cmd->se_cmd_flags & SCF_SE_LUN_CMD)) { |
c8e31f26 | 2188 | if (wait_for_tasks && (cmd->se_cmd_flags & SCF_SCSI_TMR_CDB)) |
d14921d6 NB |
2189 | transport_wait_for_tasks(cmd); |
2190 | ||
d5ddad41 | 2191 | ret = transport_release_cmd(cmd); |
d14921d6 NB |
2192 | } else { |
2193 | if (wait_for_tasks) | |
2194 | transport_wait_for_tasks(cmd); | |
2195 | ||
82f1c8a4 | 2196 | if (cmd->se_lun) |
c66ac9db | 2197 | transport_lun_remove_cmd(cmd); |
c66ac9db | 2198 | |
d5ddad41 | 2199 | ret = transport_put_cmd(cmd); |
c66ac9db | 2200 | } |
d5ddad41 | 2201 | return ret; |
c66ac9db NB |
2202 | } |
2203 | EXPORT_SYMBOL(transport_generic_free_cmd); | |
2204 | ||
a17f091d NB |
2205 | /* target_get_sess_cmd - Add command to active ->sess_cmd_list |
2206 | * @se_sess: session to reference | |
2207 | * @se_cmd: command descriptor to add | |
a6360785 | 2208 | * @ack_kref: Signal that fabric will perform an ack target_put_sess_cmd() |
a17f091d | 2209 | */ |
20361e69 | 2210 | int target_get_sess_cmd(struct se_session *se_sess, struct se_cmd *se_cmd, |
bc187ea6 | 2211 | bool ack_kref) |
a17f091d NB |
2212 | { |
2213 | unsigned long flags; | |
bc187ea6 | 2214 | int ret = 0; |
a17f091d | 2215 | |
7481deb4 | 2216 | kref_init(&se_cmd->cmd_kref); |
a6360785 NB |
2217 | /* |
2218 | * Add a second kref if the fabric caller is expecting to handle | |
2219 | * fabric acknowledgement that requires two target_put_sess_cmd() | |
2220 | * invocations before se_cmd descriptor release. | |
2221 | */ | |
86715569 | 2222 | if (ack_kref == true) { |
a6360785 | 2223 | kref_get(&se_cmd->cmd_kref); |
86715569 NB |
2224 | se_cmd->se_cmd_flags |= SCF_ACK_KREF; |
2225 | } | |
7481deb4 | 2226 | |
a17f091d | 2227 | spin_lock_irqsave(&se_sess->sess_cmd_lock, flags); |
bc187ea6 RD |
2228 | if (se_sess->sess_tearing_down) { |
2229 | ret = -ESHUTDOWN; | |
2230 | goto out; | |
2231 | } | |
a17f091d | 2232 | list_add_tail(&se_cmd->se_cmd_list, &se_sess->sess_cmd_list); |
bc187ea6 | 2233 | out: |
a17f091d | 2234 | spin_unlock_irqrestore(&se_sess->sess_cmd_lock, flags); |
bc187ea6 | 2235 | return ret; |
a17f091d | 2236 | } |
20361e69 | 2237 | EXPORT_SYMBOL(target_get_sess_cmd); |
a17f091d | 2238 | |
7481deb4 | 2239 | static void target_release_cmd_kref(struct kref *kref) |
a17f091d | 2240 | { |
7481deb4 NB |
2241 | struct se_cmd *se_cmd = container_of(kref, struct se_cmd, cmd_kref); |
2242 | struct se_session *se_sess = se_cmd->se_sess; | |
a17f091d | 2243 | |
a17f091d | 2244 | if (list_empty(&se_cmd->se_cmd_list)) { |
ccf5ae83 | 2245 | spin_unlock(&se_sess->sess_cmd_lock); |
ffc32d52 | 2246 | se_cmd->se_tfo->release_cmd(se_cmd); |
7481deb4 | 2247 | return; |
a17f091d | 2248 | } |
a17f091d | 2249 | if (se_sess->sess_tearing_down && se_cmd->cmd_wait_set) { |
ccf5ae83 | 2250 | spin_unlock(&se_sess->sess_cmd_lock); |
a17f091d | 2251 | complete(&se_cmd->cmd_wait_comp); |
7481deb4 | 2252 | return; |
a17f091d NB |
2253 | } |
2254 | list_del(&se_cmd->se_cmd_list); | |
ccf5ae83 | 2255 | spin_unlock(&se_sess->sess_cmd_lock); |
a17f091d | 2256 | |
7481deb4 NB |
2257 | se_cmd->se_tfo->release_cmd(se_cmd); |
2258 | } | |
2259 | ||
2260 | /* target_put_sess_cmd - Check for active I/O shutdown via kref_put | |
2261 | * @se_sess: session to reference | |
2262 | * @se_cmd: command descriptor to drop | |
2263 | */ | |
2264 | int target_put_sess_cmd(struct se_session *se_sess, struct se_cmd *se_cmd) | |
2265 | { | |
ccf5ae83 JE |
2266 | return kref_put_spinlock_irqsave(&se_cmd->cmd_kref, target_release_cmd_kref, |
2267 | &se_sess->sess_cmd_lock); | |
a17f091d NB |
2268 | } |
2269 | EXPORT_SYMBOL(target_put_sess_cmd); | |
2270 | ||
1c7b13fe RD |
2271 | /* target_sess_cmd_list_set_waiting - Flag all commands in |
2272 | * sess_cmd_list to complete cmd_wait_comp. Set | |
2273 | * sess_tearing_down so no more commands are queued. | |
2274 | * @se_sess: session to flag | |
a17f091d | 2275 | */ |
1c7b13fe | 2276 | void target_sess_cmd_list_set_waiting(struct se_session *se_sess) |
a17f091d NB |
2277 | { |
2278 | struct se_cmd *se_cmd; | |
2279 | unsigned long flags; | |
2280 | ||
a17f091d | 2281 | spin_lock_irqsave(&se_sess->sess_cmd_lock, flags); |
9b31a328 NB |
2282 | if (se_sess->sess_tearing_down) { |
2283 | spin_unlock_irqrestore(&se_sess->sess_cmd_lock, flags); | |
2284 | return; | |
2285 | } | |
1c7b13fe | 2286 | se_sess->sess_tearing_down = 1; |
9b31a328 | 2287 | list_splice_init(&se_sess->sess_cmd_list, &se_sess->sess_wait_list); |
a17f091d | 2288 | |
9b31a328 | 2289 | list_for_each_entry(se_cmd, &se_sess->sess_wait_list, se_cmd_list) |
a17f091d NB |
2290 | se_cmd->cmd_wait_set = 1; |
2291 | ||
2292 | spin_unlock_irqrestore(&se_sess->sess_cmd_lock, flags); | |
2293 | } | |
1c7b13fe | 2294 | EXPORT_SYMBOL(target_sess_cmd_list_set_waiting); |
a17f091d NB |
2295 | |
2296 | /* target_wait_for_sess_cmds - Wait for outstanding descriptors | |
2297 | * @se_sess: session to wait for active I/O | |
a17f091d | 2298 | */ |
be646c2d | 2299 | void target_wait_for_sess_cmds(struct se_session *se_sess) |
a17f091d NB |
2300 | { |
2301 | struct se_cmd *se_cmd, *tmp_cmd; | |
9b31a328 | 2302 | unsigned long flags; |
a17f091d NB |
2303 | |
2304 | list_for_each_entry_safe(se_cmd, tmp_cmd, | |
9b31a328 | 2305 | &se_sess->sess_wait_list, se_cmd_list) { |
a17f091d NB |
2306 | list_del(&se_cmd->se_cmd_list); |
2307 | ||
2308 | pr_debug("Waiting for se_cmd: %p t_state: %d, fabric state:" | |
2309 | " %d\n", se_cmd, se_cmd->t_state, | |
2310 | se_cmd->se_tfo->get_cmd_state(se_cmd)); | |
2311 | ||
be646c2d JE |
2312 | wait_for_completion(&se_cmd->cmd_wait_comp); |
2313 | pr_debug("After cmd_wait_comp: se_cmd: %p t_state: %d" | |
2314 | " fabric state: %d\n", se_cmd, se_cmd->t_state, | |
2315 | se_cmd->se_tfo->get_cmd_state(se_cmd)); | |
a17f091d NB |
2316 | |
2317 | se_cmd->se_tfo->release_cmd(se_cmd); | |
2318 | } | |
9b31a328 NB |
2319 | |
2320 | spin_lock_irqsave(&se_sess->sess_cmd_lock, flags); | |
2321 | WARN_ON(!list_empty(&se_sess->sess_cmd_list)); | |
2322 | spin_unlock_irqrestore(&se_sess->sess_cmd_lock, flags); | |
2323 | ||
a17f091d NB |
2324 | } |
2325 | EXPORT_SYMBOL(target_wait_for_sess_cmds); | |
2326 | ||
c66ac9db NB |
2327 | /* transport_lun_wait_for_tasks(): |
2328 | * | |
2329 | * Called from ConfigFS context to stop the passed struct se_cmd to allow | |
2330 | * an struct se_lun to be successfully shutdown. | |
2331 | */ | |
2332 | static int transport_lun_wait_for_tasks(struct se_cmd *cmd, struct se_lun *lun) | |
2333 | { | |
2334 | unsigned long flags; | |
cf572a96 CH |
2335 | int ret = 0; |
2336 | ||
c66ac9db NB |
2337 | /* |
2338 | * If the frontend has already requested this struct se_cmd to | |
2339 | * be stopped, we can safely ignore this struct se_cmd. | |
2340 | */ | |
a1d8b49a | 2341 | spin_lock_irqsave(&cmd->t_state_lock, flags); |
7d680f3b CH |
2342 | if (cmd->transport_state & CMD_T_STOP) { |
2343 | cmd->transport_state &= ~CMD_T_LUN_STOP; | |
2344 | ||
2345 | pr_debug("ConfigFS ITT[0x%08x] - CMD_T_STOP, skipping\n", | |
2346 | cmd->se_tfo->get_task_tag(cmd)); | |
a1d8b49a | 2347 | spin_unlock_irqrestore(&cmd->t_state_lock, flags); |
862e6389 | 2348 | transport_cmd_check_stop(cmd, false, false); |
e3d6f909 | 2349 | return -EPERM; |
c66ac9db | 2350 | } |
7d680f3b | 2351 | cmd->transport_state |= CMD_T_LUN_FE_STOP; |
a1d8b49a | 2352 | spin_unlock_irqrestore(&cmd->t_state_lock, flags); |
c66ac9db | 2353 | |
cf572a96 CH |
2354 | // XXX: audit task_flags checks. |
2355 | spin_lock_irqsave(&cmd->t_state_lock, flags); | |
2356 | if ((cmd->transport_state & CMD_T_BUSY) && | |
2357 | (cmd->transport_state & CMD_T_SENT)) { | |
2358 | if (!target_stop_cmd(cmd, &flags)) | |
2359 | ret++; | |
cf572a96 | 2360 | } |
5f41a31d | 2361 | spin_unlock_irqrestore(&cmd->t_state_lock, flags); |
c66ac9db | 2362 | |
785fdf70 CH |
2363 | pr_debug("ConfigFS: cmd: %p stop tasks ret:" |
2364 | " %d\n", cmd, ret); | |
c66ac9db | 2365 | if (!ret) { |
6708bb27 | 2366 | pr_debug("ConfigFS: ITT[0x%08x] - stopping cmd....\n", |
e3d6f909 | 2367 | cmd->se_tfo->get_task_tag(cmd)); |
a1d8b49a | 2368 | wait_for_completion(&cmd->transport_lun_stop_comp); |
6708bb27 | 2369 | pr_debug("ConfigFS: ITT[0x%08x] - stopped cmd....\n", |
e3d6f909 | 2370 | cmd->se_tfo->get_task_tag(cmd)); |
c66ac9db | 2371 | } |
c66ac9db NB |
2372 | |
2373 | return 0; | |
2374 | } | |
2375 | ||
c66ac9db NB |
2376 | static void __transport_clear_lun_from_sessions(struct se_lun *lun) |
2377 | { | |
2378 | struct se_cmd *cmd = NULL; | |
2379 | unsigned long lun_flags, cmd_flags; | |
2380 | /* | |
2381 | * Do exception processing and return CHECK_CONDITION status to the | |
2382 | * Initiator Port. | |
2383 | */ | |
2384 | spin_lock_irqsave(&lun->lun_cmd_lock, lun_flags); | |
5951146d AG |
2385 | while (!list_empty(&lun->lun_cmd_list)) { |
2386 | cmd = list_first_entry(&lun->lun_cmd_list, | |
2387 | struct se_cmd, se_lun_node); | |
3d26fea0 | 2388 | list_del_init(&cmd->se_lun_node); |
5951146d | 2389 | |
a1d8b49a | 2390 | spin_lock(&cmd->t_state_lock); |
6708bb27 | 2391 | pr_debug("SE_LUN[%d] - Setting cmd->transport" |
c66ac9db | 2392 | "_lun_stop for ITT: 0x%08x\n", |
e3d6f909 AG |
2393 | cmd->se_lun->unpacked_lun, |
2394 | cmd->se_tfo->get_task_tag(cmd)); | |
7d680f3b | 2395 | cmd->transport_state |= CMD_T_LUN_STOP; |
a1d8b49a | 2396 | spin_unlock(&cmd->t_state_lock); |
c66ac9db NB |
2397 | |
2398 | spin_unlock_irqrestore(&lun->lun_cmd_lock, lun_flags); | |
2399 | ||
6708bb27 AG |
2400 | if (!cmd->se_lun) { |
2401 | pr_err("ITT: 0x%08x, [i,t]_state: %u/%u\n", | |
e3d6f909 AG |
2402 | cmd->se_tfo->get_task_tag(cmd), |
2403 | cmd->se_tfo->get_cmd_state(cmd), cmd->t_state); | |
c66ac9db NB |
2404 | BUG(); |
2405 | } | |
2406 | /* | |
2407 | * If the Storage engine still owns the iscsi_cmd_t, determine | |
2408 | * and/or stop its context. | |
2409 | */ | |
6708bb27 | 2410 | pr_debug("SE_LUN[%d] - ITT: 0x%08x before transport" |
e3d6f909 AG |
2411 | "_lun_wait_for_tasks()\n", cmd->se_lun->unpacked_lun, |
2412 | cmd->se_tfo->get_task_tag(cmd)); | |
c66ac9db | 2413 | |
e3d6f909 | 2414 | if (transport_lun_wait_for_tasks(cmd, cmd->se_lun) < 0) { |
c66ac9db NB |
2415 | spin_lock_irqsave(&lun->lun_cmd_lock, lun_flags); |
2416 | continue; | |
2417 | } | |
2418 | ||
6708bb27 | 2419 | pr_debug("SE_LUN[%d] - ITT: 0x%08x after transport_lun" |
c66ac9db | 2420 | "_wait_for_tasks(): SUCCESS\n", |
e3d6f909 AG |
2421 | cmd->se_lun->unpacked_lun, |
2422 | cmd->se_tfo->get_task_tag(cmd)); | |
c66ac9db | 2423 | |
a1d8b49a | 2424 | spin_lock_irqsave(&cmd->t_state_lock, cmd_flags); |
7d680f3b | 2425 | if (!(cmd->transport_state & CMD_T_DEV_ACTIVE)) { |
a1d8b49a | 2426 | spin_unlock_irqrestore(&cmd->t_state_lock, cmd_flags); |
c66ac9db NB |
2427 | goto check_cond; |
2428 | } | |
7d680f3b | 2429 | cmd->transport_state &= ~CMD_T_DEV_ACTIVE; |
cf572a96 | 2430 | target_remove_from_state_list(cmd); |
a1d8b49a | 2431 | spin_unlock_irqrestore(&cmd->t_state_lock, cmd_flags); |
c66ac9db | 2432 | |
c66ac9db NB |
2433 | /* |
2434 | * The Storage engine stopped this struct se_cmd before it was | |
2435 | * send to the fabric frontend for delivery back to the | |
2436 | * Initiator Node. Return this SCSI CDB back with an | |
2437 | * CHECK_CONDITION status. | |
2438 | */ | |
2439 | check_cond: | |
2440 | transport_send_check_condition_and_sense(cmd, | |
2441 | TCM_NON_EXISTENT_LUN, 0); | |
2442 | /* | |
2443 | * If the fabric frontend is waiting for this iscsi_cmd_t to | |
2444 | * be released, notify the waiting thread now that LU has | |
2445 | * finished accessing it. | |
2446 | */ | |
a1d8b49a | 2447 | spin_lock_irqsave(&cmd->t_state_lock, cmd_flags); |
7d680f3b | 2448 | if (cmd->transport_state & CMD_T_LUN_FE_STOP) { |
6708bb27 | 2449 | pr_debug("SE_LUN[%d] - Detected FE stop for" |
c66ac9db NB |
2450 | " struct se_cmd: %p ITT: 0x%08x\n", |
2451 | lun->unpacked_lun, | |
e3d6f909 | 2452 | cmd, cmd->se_tfo->get_task_tag(cmd)); |
c66ac9db | 2453 | |
a1d8b49a | 2454 | spin_unlock_irqrestore(&cmd->t_state_lock, |
c66ac9db | 2455 | cmd_flags); |
862e6389 | 2456 | transport_cmd_check_stop(cmd, false, false); |
a1d8b49a | 2457 | complete(&cmd->transport_lun_fe_stop_comp); |
c66ac9db NB |
2458 | spin_lock_irqsave(&lun->lun_cmd_lock, lun_flags); |
2459 | continue; | |
2460 | } | |
6708bb27 | 2461 | pr_debug("SE_LUN[%d] - ITT: 0x%08x finished processing\n", |
e3d6f909 | 2462 | lun->unpacked_lun, cmd->se_tfo->get_task_tag(cmd)); |
c66ac9db | 2463 | |
a1d8b49a | 2464 | spin_unlock_irqrestore(&cmd->t_state_lock, cmd_flags); |
c66ac9db NB |
2465 | spin_lock_irqsave(&lun->lun_cmd_lock, lun_flags); |
2466 | } | |
2467 | spin_unlock_irqrestore(&lun->lun_cmd_lock, lun_flags); | |
2468 | } | |
2469 | ||
2470 | static int transport_clear_lun_thread(void *p) | |
2471 | { | |
8359cf43 | 2472 | struct se_lun *lun = p; |
c66ac9db NB |
2473 | |
2474 | __transport_clear_lun_from_sessions(lun); | |
2475 | complete(&lun->lun_shutdown_comp); | |
2476 | ||
2477 | return 0; | |
2478 | } | |
2479 | ||
2480 | int transport_clear_lun_from_sessions(struct se_lun *lun) | |
2481 | { | |
2482 | struct task_struct *kt; | |
2483 | ||
5951146d | 2484 | kt = kthread_run(transport_clear_lun_thread, lun, |
c66ac9db NB |
2485 | "tcm_cl_%u", lun->unpacked_lun); |
2486 | if (IS_ERR(kt)) { | |
6708bb27 | 2487 | pr_err("Unable to start clear_lun thread\n"); |
e3d6f909 | 2488 | return PTR_ERR(kt); |
c66ac9db NB |
2489 | } |
2490 | wait_for_completion(&lun->lun_shutdown_comp); | |
2491 | ||
2492 | return 0; | |
2493 | } | |
2494 | ||
d14921d6 NB |
2495 | /** |
2496 | * transport_wait_for_tasks - wait for completion to occur | |
2497 | * @cmd: command to wait | |
c66ac9db | 2498 | * |
d14921d6 NB |
2499 | * Called from frontend fabric context to wait for storage engine |
2500 | * to pause and/or release frontend generated struct se_cmd. | |
c66ac9db | 2501 | */ |
a17f091d | 2502 | bool transport_wait_for_tasks(struct se_cmd *cmd) |
c66ac9db NB |
2503 | { |
2504 | unsigned long flags; | |
2505 | ||
a1d8b49a | 2506 | spin_lock_irqsave(&cmd->t_state_lock, flags); |
c8e31f26 AG |
2507 | if (!(cmd->se_cmd_flags & SCF_SE_LUN_CMD) && |
2508 | !(cmd->se_cmd_flags & SCF_SCSI_TMR_CDB)) { | |
d14921d6 | 2509 | spin_unlock_irqrestore(&cmd->t_state_lock, flags); |
a17f091d | 2510 | return false; |
d14921d6 | 2511 | } |
cb4f4d3c | 2512 | |
c8e31f26 AG |
2513 | if (!(cmd->se_cmd_flags & SCF_SUPPORTED_SAM_OPCODE) && |
2514 | !(cmd->se_cmd_flags & SCF_SCSI_TMR_CDB)) { | |
d14921d6 | 2515 | spin_unlock_irqrestore(&cmd->t_state_lock, flags); |
a17f091d | 2516 | return false; |
d14921d6 | 2517 | } |
c66ac9db NB |
2518 | /* |
2519 | * If we are already stopped due to an external event (ie: LUN shutdown) | |
2520 | * sleep until the connection can have the passed struct se_cmd back. | |
a1d8b49a | 2521 | * The cmd->transport_lun_stopped_sem will be upped by |
c66ac9db NB |
2522 | * transport_clear_lun_from_sessions() once the ConfigFS context caller |
2523 | * has completed its operation on the struct se_cmd. | |
2524 | */ | |
7d680f3b | 2525 | if (cmd->transport_state & CMD_T_LUN_STOP) { |
6708bb27 | 2526 | pr_debug("wait_for_tasks: Stopping" |
e3d6f909 | 2527 | " wait_for_completion(&cmd->t_tasktransport_lun_fe" |
c66ac9db | 2528 | "_stop_comp); for ITT: 0x%08x\n", |
e3d6f909 | 2529 | cmd->se_tfo->get_task_tag(cmd)); |
c66ac9db NB |
2530 | /* |
2531 | * There is a special case for WRITES where a FE exception + | |
2532 | * LUN shutdown means ConfigFS context is still sleeping on | |
2533 | * transport_lun_stop_comp in transport_lun_wait_for_tasks(). | |
2534 | * We go ahead and up transport_lun_stop_comp just to be sure | |
2535 | * here. | |
2536 | */ | |
a1d8b49a AG |
2537 | spin_unlock_irqrestore(&cmd->t_state_lock, flags); |
2538 | complete(&cmd->transport_lun_stop_comp); | |
2539 | wait_for_completion(&cmd->transport_lun_fe_stop_comp); | |
2540 | spin_lock_irqsave(&cmd->t_state_lock, flags); | |
c66ac9db | 2541 | |
cf572a96 | 2542 | target_remove_from_state_list(cmd); |
c66ac9db NB |
2543 | /* |
2544 | * At this point, the frontend who was the originator of this | |
2545 | * struct se_cmd, now owns the structure and can be released through | |
2546 | * normal means below. | |
2547 | */ | |
6708bb27 | 2548 | pr_debug("wait_for_tasks: Stopped" |
e3d6f909 | 2549 | " wait_for_completion(&cmd->t_tasktransport_lun_fe_" |
c66ac9db | 2550 | "stop_comp); for ITT: 0x%08x\n", |
e3d6f909 | 2551 | cmd->se_tfo->get_task_tag(cmd)); |
c66ac9db | 2552 | |
7d680f3b | 2553 | cmd->transport_state &= ~CMD_T_LUN_STOP; |
c66ac9db | 2554 | } |
7d680f3b | 2555 | |
3d28934a | 2556 | if (!(cmd->transport_state & CMD_T_ACTIVE)) { |
d14921d6 | 2557 | spin_unlock_irqrestore(&cmd->t_state_lock, flags); |
a17f091d | 2558 | return false; |
d14921d6 | 2559 | } |
c66ac9db | 2560 | |
7d680f3b | 2561 | cmd->transport_state |= CMD_T_STOP; |
c66ac9db | 2562 | |
6708bb27 | 2563 | pr_debug("wait_for_tasks: Stopping %p ITT: 0x%08x" |
7d680f3b | 2564 | " i_state: %d, t_state: %d, CMD_T_STOP\n", |
f2da9dbd CH |
2565 | cmd, cmd->se_tfo->get_task_tag(cmd), |
2566 | cmd->se_tfo->get_cmd_state(cmd), cmd->t_state); | |
c66ac9db | 2567 | |
a1d8b49a | 2568 | spin_unlock_irqrestore(&cmd->t_state_lock, flags); |
c66ac9db | 2569 | |
a1d8b49a | 2570 | wait_for_completion(&cmd->t_transport_stop_comp); |
c66ac9db | 2571 | |
a1d8b49a | 2572 | spin_lock_irqsave(&cmd->t_state_lock, flags); |
7d680f3b | 2573 | cmd->transport_state &= ~(CMD_T_ACTIVE | CMD_T_STOP); |
c66ac9db | 2574 | |
35d1efe8 | 2575 | pr_debug("wait_for_tasks: Stopped wait_for_completion(" |
a1d8b49a | 2576 | "&cmd->t_transport_stop_comp) for ITT: 0x%08x\n", |
e3d6f909 | 2577 | cmd->se_tfo->get_task_tag(cmd)); |
c66ac9db | 2578 | |
d14921d6 | 2579 | spin_unlock_irqrestore(&cmd->t_state_lock, flags); |
a17f091d NB |
2580 | |
2581 | return true; | |
c66ac9db | 2582 | } |
d14921d6 | 2583 | EXPORT_SYMBOL(transport_wait_for_tasks); |
c66ac9db NB |
2584 | |
2585 | static int transport_get_sense_codes( | |
2586 | struct se_cmd *cmd, | |
2587 | u8 *asc, | |
2588 | u8 *ascq) | |
2589 | { | |
2590 | *asc = cmd->scsi_asc; | |
2591 | *ascq = cmd->scsi_ascq; | |
2592 | ||
2593 | return 0; | |
2594 | } | |
2595 | ||
de103c93 CH |
2596 | int |
2597 | transport_send_check_condition_and_sense(struct se_cmd *cmd, | |
2598 | sense_reason_t reason, int from_transport) | |
c66ac9db NB |
2599 | { |
2600 | unsigned char *buffer = cmd->sense_buffer; | |
2601 | unsigned long flags; | |
c66ac9db NB |
2602 | u8 asc = 0, ascq = 0; |
2603 | ||
a1d8b49a | 2604 | spin_lock_irqsave(&cmd->t_state_lock, flags); |
c66ac9db | 2605 | if (cmd->se_cmd_flags & SCF_SENT_CHECK_CONDITION) { |
a1d8b49a | 2606 | spin_unlock_irqrestore(&cmd->t_state_lock, flags); |
c66ac9db NB |
2607 | return 0; |
2608 | } | |
2609 | cmd->se_cmd_flags |= SCF_SENT_CHECK_CONDITION; | |
a1d8b49a | 2610 | spin_unlock_irqrestore(&cmd->t_state_lock, flags); |
c66ac9db NB |
2611 | |
2612 | if (!reason && from_transport) | |
2613 | goto after_reason; | |
2614 | ||
2615 | if (!from_transport) | |
2616 | cmd->se_cmd_flags |= SCF_EMULATED_TASK_SENSE; | |
9c58b7dd | 2617 | |
c66ac9db NB |
2618 | /* |
2619 | * Actual SENSE DATA, see SPC-3 7.23.2 SPC_SENSE_KEY_OFFSET uses | |
2620 | * SENSE KEY values from include/scsi/scsi.h | |
2621 | */ | |
2622 | switch (reason) { | |
ba829137 HR |
2623 | case TCM_NO_SENSE: |
2624 | /* CURRENT ERROR */ | |
2625 | buffer[0] = 0x70; | |
2626 | buffer[SPC_ADD_SENSE_LEN_OFFSET] = 10; | |
2627 | /* Not Ready */ | |
2628 | buffer[SPC_SENSE_KEY_OFFSET] = NOT_READY; | |
2629 | /* NO ADDITIONAL SENSE INFORMATION */ | |
2630 | buffer[SPC_ASC_KEY_OFFSET] = 0; | |
2631 | buffer[SPC_ASCQ_KEY_OFFSET] = 0; | |
2632 | break; | |
c66ac9db | 2633 | case TCM_NON_EXISTENT_LUN: |
eb39d340 | 2634 | /* CURRENT ERROR */ |
9c58b7dd RD |
2635 | buffer[0] = 0x70; |
2636 | buffer[SPC_ADD_SENSE_LEN_OFFSET] = 10; | |
eb39d340 | 2637 | /* ILLEGAL REQUEST */ |
9c58b7dd | 2638 | buffer[SPC_SENSE_KEY_OFFSET] = ILLEGAL_REQUEST; |
eb39d340 | 2639 | /* LOGICAL UNIT NOT SUPPORTED */ |
9c58b7dd | 2640 | buffer[SPC_ASC_KEY_OFFSET] = 0x25; |
eb39d340 | 2641 | break; |
c66ac9db NB |
2642 | case TCM_UNSUPPORTED_SCSI_OPCODE: |
2643 | case TCM_SECTOR_COUNT_TOO_MANY: | |
2644 | /* CURRENT ERROR */ | |
9c58b7dd RD |
2645 | buffer[0] = 0x70; |
2646 | buffer[SPC_ADD_SENSE_LEN_OFFSET] = 10; | |
c66ac9db | 2647 | /* ILLEGAL REQUEST */ |
9c58b7dd | 2648 | buffer[SPC_SENSE_KEY_OFFSET] = ILLEGAL_REQUEST; |
c66ac9db | 2649 | /* INVALID COMMAND OPERATION CODE */ |
9c58b7dd | 2650 | buffer[SPC_ASC_KEY_OFFSET] = 0x20; |
c66ac9db NB |
2651 | break; |
2652 | case TCM_UNKNOWN_MODE_PAGE: | |
2653 | /* CURRENT ERROR */ | |
9c58b7dd RD |
2654 | buffer[0] = 0x70; |
2655 | buffer[SPC_ADD_SENSE_LEN_OFFSET] = 10; | |
c66ac9db | 2656 | /* ILLEGAL REQUEST */ |
9c58b7dd | 2657 | buffer[SPC_SENSE_KEY_OFFSET] = ILLEGAL_REQUEST; |
c66ac9db | 2658 | /* INVALID FIELD IN CDB */ |
9c58b7dd | 2659 | buffer[SPC_ASC_KEY_OFFSET] = 0x24; |
c66ac9db NB |
2660 | break; |
2661 | case TCM_CHECK_CONDITION_ABORT_CMD: | |
2662 | /* CURRENT ERROR */ | |
9c58b7dd RD |
2663 | buffer[0] = 0x70; |
2664 | buffer[SPC_ADD_SENSE_LEN_OFFSET] = 10; | |
c66ac9db | 2665 | /* ABORTED COMMAND */ |
9c58b7dd | 2666 | buffer[SPC_SENSE_KEY_OFFSET] = ABORTED_COMMAND; |
c66ac9db | 2667 | /* BUS DEVICE RESET FUNCTION OCCURRED */ |
9c58b7dd RD |
2668 | buffer[SPC_ASC_KEY_OFFSET] = 0x29; |
2669 | buffer[SPC_ASCQ_KEY_OFFSET] = 0x03; | |
c66ac9db NB |
2670 | break; |
2671 | case TCM_INCORRECT_AMOUNT_OF_DATA: | |
2672 | /* CURRENT ERROR */ | |
9c58b7dd RD |
2673 | buffer[0] = 0x70; |
2674 | buffer[SPC_ADD_SENSE_LEN_OFFSET] = 10; | |
c66ac9db | 2675 | /* ABORTED COMMAND */ |
9c58b7dd | 2676 | buffer[SPC_SENSE_KEY_OFFSET] = ABORTED_COMMAND; |
c66ac9db | 2677 | /* WRITE ERROR */ |
9c58b7dd | 2678 | buffer[SPC_ASC_KEY_OFFSET] = 0x0c; |
c66ac9db | 2679 | /* NOT ENOUGH UNSOLICITED DATA */ |
9c58b7dd | 2680 | buffer[SPC_ASCQ_KEY_OFFSET] = 0x0d; |
c66ac9db NB |
2681 | break; |
2682 | case TCM_INVALID_CDB_FIELD: | |
2683 | /* CURRENT ERROR */ | |
9c58b7dd RD |
2684 | buffer[0] = 0x70; |
2685 | buffer[SPC_ADD_SENSE_LEN_OFFSET] = 10; | |
9fbc8909 | 2686 | /* ILLEGAL REQUEST */ |
9c58b7dd | 2687 | buffer[SPC_SENSE_KEY_OFFSET] = ILLEGAL_REQUEST; |
c66ac9db | 2688 | /* INVALID FIELD IN CDB */ |
9c58b7dd | 2689 | buffer[SPC_ASC_KEY_OFFSET] = 0x24; |
c66ac9db NB |
2690 | break; |
2691 | case TCM_INVALID_PARAMETER_LIST: | |
2692 | /* CURRENT ERROR */ | |
9c58b7dd RD |
2693 | buffer[0] = 0x70; |
2694 | buffer[SPC_ADD_SENSE_LEN_OFFSET] = 10; | |
9fbc8909 | 2695 | /* ILLEGAL REQUEST */ |
9c58b7dd | 2696 | buffer[SPC_SENSE_KEY_OFFSET] = ILLEGAL_REQUEST; |
c66ac9db | 2697 | /* INVALID FIELD IN PARAMETER LIST */ |
9c58b7dd | 2698 | buffer[SPC_ASC_KEY_OFFSET] = 0x26; |
c66ac9db | 2699 | break; |
bb992e72 RD |
2700 | case TCM_PARAMETER_LIST_LENGTH_ERROR: |
2701 | /* CURRENT ERROR */ | |
2702 | buffer[0] = 0x70; | |
2703 | buffer[SPC_ADD_SENSE_LEN_OFFSET] = 10; | |
2704 | /* ILLEGAL REQUEST */ | |
2705 | buffer[SPC_SENSE_KEY_OFFSET] = ILLEGAL_REQUEST; | |
2706 | /* PARAMETER LIST LENGTH ERROR */ | |
2707 | buffer[SPC_ASC_KEY_OFFSET] = 0x1a; | |
2708 | break; | |
c66ac9db NB |
2709 | case TCM_UNEXPECTED_UNSOLICITED_DATA: |
2710 | /* CURRENT ERROR */ | |
9c58b7dd RD |
2711 | buffer[0] = 0x70; |
2712 | buffer[SPC_ADD_SENSE_LEN_OFFSET] = 10; | |
c66ac9db | 2713 | /* ABORTED COMMAND */ |
9c58b7dd | 2714 | buffer[SPC_SENSE_KEY_OFFSET] = ABORTED_COMMAND; |
c66ac9db | 2715 | /* WRITE ERROR */ |
9c58b7dd | 2716 | buffer[SPC_ASC_KEY_OFFSET] = 0x0c; |
c66ac9db | 2717 | /* UNEXPECTED_UNSOLICITED_DATA */ |
9c58b7dd | 2718 | buffer[SPC_ASCQ_KEY_OFFSET] = 0x0c; |
c66ac9db NB |
2719 | break; |
2720 | case TCM_SERVICE_CRC_ERROR: | |
2721 | /* CURRENT ERROR */ | |
9c58b7dd RD |
2722 | buffer[0] = 0x70; |
2723 | buffer[SPC_ADD_SENSE_LEN_OFFSET] = 10; | |
c66ac9db | 2724 | /* ABORTED COMMAND */ |
9c58b7dd | 2725 | buffer[SPC_SENSE_KEY_OFFSET] = ABORTED_COMMAND; |
c66ac9db | 2726 | /* PROTOCOL SERVICE CRC ERROR */ |
9c58b7dd | 2727 | buffer[SPC_ASC_KEY_OFFSET] = 0x47; |
c66ac9db | 2728 | /* N/A */ |
9c58b7dd | 2729 | buffer[SPC_ASCQ_KEY_OFFSET] = 0x05; |
c66ac9db NB |
2730 | break; |
2731 | case TCM_SNACK_REJECTED: | |
2732 | /* CURRENT ERROR */ | |
9c58b7dd RD |
2733 | buffer[0] = 0x70; |
2734 | buffer[SPC_ADD_SENSE_LEN_OFFSET] = 10; | |
c66ac9db | 2735 | /* ABORTED COMMAND */ |
9c58b7dd | 2736 | buffer[SPC_SENSE_KEY_OFFSET] = ABORTED_COMMAND; |
c66ac9db | 2737 | /* READ ERROR */ |
9c58b7dd | 2738 | buffer[SPC_ASC_KEY_OFFSET] = 0x11; |
c66ac9db | 2739 | /* FAILED RETRANSMISSION REQUEST */ |
9c58b7dd | 2740 | buffer[SPC_ASCQ_KEY_OFFSET] = 0x13; |
c66ac9db NB |
2741 | break; |
2742 | case TCM_WRITE_PROTECTED: | |
2743 | /* CURRENT ERROR */ | |
9c58b7dd RD |
2744 | buffer[0] = 0x70; |
2745 | buffer[SPC_ADD_SENSE_LEN_OFFSET] = 10; | |
c66ac9db | 2746 | /* DATA PROTECT */ |
9c58b7dd | 2747 | buffer[SPC_SENSE_KEY_OFFSET] = DATA_PROTECT; |
c66ac9db | 2748 | /* WRITE PROTECTED */ |
9c58b7dd | 2749 | buffer[SPC_ASC_KEY_OFFSET] = 0x27; |
c66ac9db | 2750 | break; |
e2397c70 RD |
2751 | case TCM_ADDRESS_OUT_OF_RANGE: |
2752 | /* CURRENT ERROR */ | |
9c58b7dd RD |
2753 | buffer[0] = 0x70; |
2754 | buffer[SPC_ADD_SENSE_LEN_OFFSET] = 10; | |
e2397c70 | 2755 | /* ILLEGAL REQUEST */ |
9c58b7dd | 2756 | buffer[SPC_SENSE_KEY_OFFSET] = ILLEGAL_REQUEST; |
e2397c70 | 2757 | /* LOGICAL BLOCK ADDRESS OUT OF RANGE */ |
9c58b7dd | 2758 | buffer[SPC_ASC_KEY_OFFSET] = 0x21; |
e2397c70 | 2759 | break; |
c66ac9db NB |
2760 | case TCM_CHECK_CONDITION_UNIT_ATTENTION: |
2761 | /* CURRENT ERROR */ | |
9c58b7dd RD |
2762 | buffer[0] = 0x70; |
2763 | buffer[SPC_ADD_SENSE_LEN_OFFSET] = 10; | |
c66ac9db | 2764 | /* UNIT ATTENTION */ |
9c58b7dd | 2765 | buffer[SPC_SENSE_KEY_OFFSET] = UNIT_ATTENTION; |
c66ac9db | 2766 | core_scsi3_ua_for_check_condition(cmd, &asc, &ascq); |
9c58b7dd RD |
2767 | buffer[SPC_ASC_KEY_OFFSET] = asc; |
2768 | buffer[SPC_ASCQ_KEY_OFFSET] = ascq; | |
c66ac9db NB |
2769 | break; |
2770 | case TCM_CHECK_CONDITION_NOT_READY: | |
2771 | /* CURRENT ERROR */ | |
9c58b7dd RD |
2772 | buffer[0] = 0x70; |
2773 | buffer[SPC_ADD_SENSE_LEN_OFFSET] = 10; | |
c66ac9db | 2774 | /* Not Ready */ |
9c58b7dd | 2775 | buffer[SPC_SENSE_KEY_OFFSET] = NOT_READY; |
c66ac9db | 2776 | transport_get_sense_codes(cmd, &asc, &ascq); |
9c58b7dd RD |
2777 | buffer[SPC_ASC_KEY_OFFSET] = asc; |
2778 | buffer[SPC_ASCQ_KEY_OFFSET] = ascq; | |
c66ac9db NB |
2779 | break; |
2780 | case TCM_LOGICAL_UNIT_COMMUNICATION_FAILURE: | |
2781 | default: | |
2782 | /* CURRENT ERROR */ | |
9c58b7dd RD |
2783 | buffer[0] = 0x70; |
2784 | buffer[SPC_ADD_SENSE_LEN_OFFSET] = 10; | |
ad673282 JE |
2785 | /* |
2786 | * Returning ILLEGAL REQUEST would cause immediate IO errors on | |
2787 | * Solaris initiators. Returning NOT READY instead means the | |
2788 | * operations will be retried a finite number of times and we | |
2789 | * can survive intermittent errors. | |
2790 | */ | |
2791 | buffer[SPC_SENSE_KEY_OFFSET] = NOT_READY; | |
c66ac9db | 2792 | /* LOGICAL UNIT COMMUNICATION FAILURE */ |
18a9df42 | 2793 | buffer[SPC_ASC_KEY_OFFSET] = 0x08; |
c66ac9db NB |
2794 | break; |
2795 | } | |
2796 | /* | |
2797 | * This code uses linux/include/scsi/scsi.h SAM status codes! | |
2798 | */ | |
2799 | cmd->scsi_status = SAM_STAT_CHECK_CONDITION; | |
2800 | /* | |
2801 | * Automatically padded, this value is encoded in the fabric's | |
2802 | * data_length response PDU containing the SCSI defined sense data. | |
2803 | */ | |
9c58b7dd | 2804 | cmd->scsi_sense_length = TRANSPORT_SENSE_BUFFER; |
c66ac9db NB |
2805 | |
2806 | after_reason: | |
e5c0d6ad | 2807 | trace_target_cmd_complete(cmd); |
07bde79a | 2808 | return cmd->se_tfo->queue_status(cmd); |
c66ac9db NB |
2809 | } |
2810 | EXPORT_SYMBOL(transport_send_check_condition_and_sense); | |
2811 | ||
2812 | int transport_check_aborted_status(struct se_cmd *cmd, int send_status) | |
2813 | { | |
c18bc7d8 RD |
2814 | if (!(cmd->transport_state & CMD_T_ABORTED)) |
2815 | return 0; | |
c66ac9db | 2816 | |
c18bc7d8 RD |
2817 | if (!send_status || (cmd->se_cmd_flags & SCF_SENT_DELAYED_TAS)) |
2818 | return 1; | |
8b1e1244 | 2819 | |
c18bc7d8 RD |
2820 | pr_debug("Sending delayed SAM_STAT_TASK_ABORTED status for CDB: 0x%02x ITT: 0x%08x\n", |
2821 | cmd->t_task_cdb[0], cmd->se_tfo->get_task_tag(cmd)); | |
8b1e1244 | 2822 | |
c18bc7d8 | 2823 | cmd->se_cmd_flags |= SCF_SENT_DELAYED_TAS; |
e5c0d6ad | 2824 | trace_target_cmd_complete(cmd); |
c18bc7d8 RD |
2825 | cmd->se_tfo->queue_status(cmd); |
2826 | ||
2827 | return 1; | |
c66ac9db NB |
2828 | } |
2829 | EXPORT_SYMBOL(transport_check_aborted_status); | |
2830 | ||
2831 | void transport_send_task_abort(struct se_cmd *cmd) | |
2832 | { | |
c252f003 NB |
2833 | unsigned long flags; |
2834 | ||
2835 | spin_lock_irqsave(&cmd->t_state_lock, flags); | |
3ea160b3 | 2836 | if (cmd->se_cmd_flags & (SCF_SENT_CHECK_CONDITION | SCF_SENT_DELAYED_TAS)) { |
c252f003 NB |
2837 | spin_unlock_irqrestore(&cmd->t_state_lock, flags); |
2838 | return; | |
2839 | } | |
2840 | spin_unlock_irqrestore(&cmd->t_state_lock, flags); | |
2841 | ||
c66ac9db NB |
2842 | /* |
2843 | * If there are still expected incoming fabric WRITEs, we wait | |
2844 | * until until they have completed before sending a TASK_ABORTED | |
2845 | * response. This response with TASK_ABORTED status will be | |
2846 | * queued back to fabric module by transport_check_aborted_status(). | |
2847 | */ | |
2848 | if (cmd->data_direction == DMA_TO_DEVICE) { | |
e3d6f909 | 2849 | if (cmd->se_tfo->write_pending_status(cmd) != 0) { |
7d680f3b | 2850 | cmd->transport_state |= CMD_T_ABORTED; |
c66ac9db | 2851 | smp_mb__after_atomic_inc(); |
c66ac9db NB |
2852 | } |
2853 | } | |
2854 | cmd->scsi_status = SAM_STAT_TASK_ABORTED; | |
8b1e1244 | 2855 | |
72b59d6e RD |
2856 | transport_lun_remove_cmd(cmd); |
2857 | ||
6708bb27 | 2858 | pr_debug("Setting SAM_STAT_TASK_ABORTED status for CDB: 0x%02x," |
a1d8b49a | 2859 | " ITT: 0x%08x\n", cmd->t_task_cdb[0], |
e3d6f909 | 2860 | cmd->se_tfo->get_task_tag(cmd)); |
8b1e1244 | 2861 | |
e5c0d6ad | 2862 | trace_target_cmd_complete(cmd); |
e3d6f909 | 2863 | cmd->se_tfo->queue_status(cmd); |
c66ac9db NB |
2864 | } |
2865 | ||
af877292 | 2866 | static void target_tmr_work(struct work_struct *work) |
c66ac9db | 2867 | { |
af877292 | 2868 | struct se_cmd *cmd = container_of(work, struct se_cmd, work); |
5951146d | 2869 | struct se_device *dev = cmd->se_dev; |
c66ac9db NB |
2870 | struct se_tmr_req *tmr = cmd->se_tmr_req; |
2871 | int ret; | |
2872 | ||
2873 | switch (tmr->function) { | |
5c6cd613 | 2874 | case TMR_ABORT_TASK: |
3d28934a | 2875 | core_tmr_abort_task(dev, tmr, cmd->se_sess); |
c66ac9db | 2876 | break; |
5c6cd613 NB |
2877 | case TMR_ABORT_TASK_SET: |
2878 | case TMR_CLEAR_ACA: | |
2879 | case TMR_CLEAR_TASK_SET: | |
c66ac9db NB |
2880 | tmr->response = TMR_TASK_MGMT_FUNCTION_NOT_SUPPORTED; |
2881 | break; | |
5c6cd613 | 2882 | case TMR_LUN_RESET: |
c66ac9db NB |
2883 | ret = core_tmr_lun_reset(dev, tmr, NULL, NULL); |
2884 | tmr->response = (!ret) ? TMR_FUNCTION_COMPLETE : | |
2885 | TMR_FUNCTION_REJECTED; | |
2886 | break; | |
5c6cd613 | 2887 | case TMR_TARGET_WARM_RESET: |
c66ac9db NB |
2888 | tmr->response = TMR_FUNCTION_REJECTED; |
2889 | break; | |
5c6cd613 | 2890 | case TMR_TARGET_COLD_RESET: |
c66ac9db NB |
2891 | tmr->response = TMR_FUNCTION_REJECTED; |
2892 | break; | |
c66ac9db | 2893 | default: |
6708bb27 | 2894 | pr_err("Uknown TMR function: 0x%02x.\n", |
c66ac9db NB |
2895 | tmr->function); |
2896 | tmr->response = TMR_FUNCTION_REJECTED; | |
2897 | break; | |
2898 | } | |
2899 | ||
2900 | cmd->t_state = TRANSPORT_ISTATE_PROCESSING; | |
e3d6f909 | 2901 | cmd->se_tfo->queue_tm_rsp(cmd); |
c66ac9db | 2902 | |
b7b8bef7 | 2903 | transport_cmd_check_stop_to_fabric(cmd); |
c66ac9db NB |
2904 | } |
2905 | ||
af877292 CH |
2906 | int transport_generic_handle_tmr( |
2907 | struct se_cmd *cmd) | |
c66ac9db | 2908 | { |
af877292 CH |
2909 | INIT_WORK(&cmd->work, target_tmr_work); |
2910 | queue_work(cmd->se_dev->tmr_wq, &cmd->work); | |
c66ac9db NB |
2911 | return 0; |
2912 | } | |
af877292 | 2913 | EXPORT_SYMBOL(transport_generic_handle_tmr); |