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