]>
Commit | Line | Data |
---|---|---|
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 | { | |
9ac8928e | 325 | const struct target_core_fabric_ops *tfo = se_tpg->se_tpg_tfo; |
c66ac9db NB |
326 | unsigned char buf[PR_REG_ISID_LEN]; |
327 | ||
328 | se_sess->se_tpg = se_tpg; | |
329 | se_sess->fabric_sess_ptr = fabric_sess_ptr; | |
330 | /* | |
331 | * Used by struct se_node_acl's under ConfigFS to locate active se_session-t | |
332 | * | |
333 | * Only set for struct se_session's that will actually be moving I/O. | |
334 | * eg: *NOT* discovery sessions. | |
335 | */ | |
336 | if (se_nacl) { | |
bffb5128 NB |
337 | /* |
338 | * | |
339 | * Determine if fabric allows for T10-PI feature bits exposed to | |
340 | * initiators for device backends with !dev->dev_attrib.pi_prot_type. | |
341 | * | |
342 | * If so, then always save prot_type on a per se_node_acl node | |
343 | * basis and re-instate the previous sess_prot_type to avoid | |
344 | * disabling PI from below any previously initiator side | |
345 | * registered LUNs. | |
346 | */ | |
347 | if (se_nacl->saved_prot_type) | |
348 | se_sess->sess_prot_type = se_nacl->saved_prot_type; | |
349 | else if (tfo->tpg_check_prot_fabric_only) | |
350 | se_sess->sess_prot_type = se_nacl->saved_prot_type = | |
351 | tfo->tpg_check_prot_fabric_only(se_tpg); | |
c66ac9db NB |
352 | /* |
353 | * If the fabric module supports an ISID based TransportID, | |
354 | * save this value in binary from the fabric I_T Nexus now. | |
355 | */ | |
e3d6f909 | 356 | if (se_tpg->se_tpg_tfo->sess_get_initiator_sid != NULL) { |
c66ac9db | 357 | memset(&buf[0], 0, PR_REG_ISID_LEN); |
e3d6f909 | 358 | se_tpg->se_tpg_tfo->sess_get_initiator_sid(se_sess, |
c66ac9db NB |
359 | &buf[0], PR_REG_ISID_LEN); |
360 | se_sess->sess_bin_isid = get_unaligned_be64(&buf[0]); | |
361 | } | |
afb999ff NB |
362 | kref_get(&se_nacl->acl_kref); |
363 | ||
c66ac9db NB |
364 | spin_lock_irq(&se_nacl->nacl_sess_lock); |
365 | /* | |
366 | * The se_nacl->nacl_sess pointer will be set to the | |
367 | * last active I_T Nexus for each struct se_node_acl. | |
368 | */ | |
369 | se_nacl->nacl_sess = se_sess; | |
370 | ||
371 | list_add_tail(&se_sess->sess_acl_list, | |
372 | &se_nacl->acl_sess_list); | |
373 | spin_unlock_irq(&se_nacl->nacl_sess_lock); | |
374 | } | |
375 | list_add_tail(&se_sess->sess_list, &se_tpg->tpg_sess_list); | |
376 | ||
6708bb27 | 377 | pr_debug("TARGET_CORE[%s]: Registered fabric_sess_ptr: %p\n", |
e3d6f909 | 378 | se_tpg->se_tpg_tfo->get_fabric_name(), se_sess->fabric_sess_ptr); |
c66ac9db NB |
379 | } |
380 | EXPORT_SYMBOL(__transport_register_session); | |
381 | ||
382 | void transport_register_session( | |
383 | struct se_portal_group *se_tpg, | |
384 | struct se_node_acl *se_nacl, | |
385 | struct se_session *se_sess, | |
386 | void *fabric_sess_ptr) | |
387 | { | |
140854cb NB |
388 | unsigned long flags; |
389 | ||
390 | spin_lock_irqsave(&se_tpg->session_lock, flags); | |
c66ac9db | 391 | __transport_register_session(se_tpg, se_nacl, se_sess, fabric_sess_ptr); |
140854cb | 392 | spin_unlock_irqrestore(&se_tpg->session_lock, flags); |
c66ac9db NB |
393 | } |
394 | EXPORT_SYMBOL(transport_register_session); | |
395 | ||
ecf0dd66 | 396 | static void target_release_session(struct kref *kref) |
41ac82b6 NB |
397 | { |
398 | struct se_session *se_sess = container_of(kref, | |
399 | struct se_session, sess_kref); | |
400 | struct se_portal_group *se_tpg = se_sess->se_tpg; | |
401 | ||
402 | se_tpg->se_tpg_tfo->close_session(se_sess); | |
403 | } | |
404 | ||
405 | void target_get_session(struct se_session *se_sess) | |
406 | { | |
407 | kref_get(&se_sess->sess_kref); | |
408 | } | |
409 | EXPORT_SYMBOL(target_get_session); | |
410 | ||
33933a0e | 411 | void target_put_session(struct se_session *se_sess) |
41ac82b6 | 412 | { |
4149268e JE |
413 | struct se_portal_group *tpg = se_sess->se_tpg; |
414 | ||
415 | if (tpg->se_tpg_tfo->put_session != NULL) { | |
416 | tpg->se_tpg_tfo->put_session(se_sess); | |
417 | return; | |
418 | } | |
33933a0e | 419 | kref_put(&se_sess->sess_kref, target_release_session); |
41ac82b6 NB |
420 | } |
421 | EXPORT_SYMBOL(target_put_session); | |
422 | ||
f8e471f9 NB |
423 | ssize_t target_show_dynamic_sessions(struct se_portal_group *se_tpg, char *page) |
424 | { | |
425 | struct se_session *se_sess; | |
426 | ssize_t len = 0; | |
427 | ||
428 | spin_lock_bh(&se_tpg->session_lock); | |
429 | list_for_each_entry(se_sess, &se_tpg->tpg_sess_list, sess_list) { | |
430 | if (!se_sess->se_node_acl) | |
431 | continue; | |
432 | if (!se_sess->se_node_acl->dynamic_node_acl) | |
433 | continue; | |
434 | if (strlen(se_sess->se_node_acl->initiatorname) + 1 + len > PAGE_SIZE) | |
435 | break; | |
436 | ||
437 | len += snprintf(page + len, PAGE_SIZE - len, "%s\n", | |
438 | se_sess->se_node_acl->initiatorname); | |
439 | len += 1; /* Include NULL terminator */ | |
440 | } | |
441 | spin_unlock_bh(&se_tpg->session_lock); | |
442 | ||
443 | return len; | |
444 | } | |
445 | EXPORT_SYMBOL(target_show_dynamic_sessions); | |
446 | ||
afb999ff NB |
447 | static void target_complete_nacl(struct kref *kref) |
448 | { | |
449 | struct se_node_acl *nacl = container_of(kref, | |
450 | struct se_node_acl, acl_kref); | |
451 | ||
452 | complete(&nacl->acl_free_comp); | |
453 | } | |
454 | ||
455 | void target_put_nacl(struct se_node_acl *nacl) | |
456 | { | |
457 | kref_put(&nacl->acl_kref, target_complete_nacl); | |
458 | } | |
459 | ||
c66ac9db NB |
460 | void transport_deregister_session_configfs(struct se_session *se_sess) |
461 | { | |
462 | struct se_node_acl *se_nacl; | |
23388864 | 463 | unsigned long flags; |
c66ac9db NB |
464 | /* |
465 | * Used by struct se_node_acl's under ConfigFS to locate active struct se_session | |
466 | */ | |
467 | se_nacl = se_sess->se_node_acl; | |
6708bb27 | 468 | if (se_nacl) { |
23388864 | 469 | spin_lock_irqsave(&se_nacl->nacl_sess_lock, flags); |
337c0607 NB |
470 | if (se_nacl->acl_stop == 0) |
471 | list_del(&se_sess->sess_acl_list); | |
c66ac9db NB |
472 | /* |
473 | * If the session list is empty, then clear the pointer. | |
474 | * Otherwise, set the struct se_session pointer from the tail | |
475 | * element of the per struct se_node_acl active session list. | |
476 | */ | |
477 | if (list_empty(&se_nacl->acl_sess_list)) | |
478 | se_nacl->nacl_sess = NULL; | |
479 | else { | |
480 | se_nacl->nacl_sess = container_of( | |
481 | se_nacl->acl_sess_list.prev, | |
482 | struct se_session, sess_acl_list); | |
483 | } | |
23388864 | 484 | spin_unlock_irqrestore(&se_nacl->nacl_sess_lock, flags); |
c66ac9db NB |
485 | } |
486 | } | |
487 | EXPORT_SYMBOL(transport_deregister_session_configfs); | |
488 | ||
489 | void transport_free_session(struct se_session *se_sess) | |
490 | { | |
c0add7fd NB |
491 | if (se_sess->sess_cmd_map) { |
492 | percpu_ida_destroy(&se_sess->sess_tag_pool); | |
8c7f6e9b NB |
493 | if (is_vmalloc_addr(se_sess->sess_cmd_map)) |
494 | vfree(se_sess->sess_cmd_map); | |
495 | else | |
496 | kfree(se_sess->sess_cmd_map); | |
c0add7fd | 497 | } |
c66ac9db NB |
498 | kmem_cache_free(se_sess_cache, se_sess); |
499 | } | |
500 | EXPORT_SYMBOL(transport_free_session); | |
501 | ||
502 | void transport_deregister_session(struct se_session *se_sess) | |
503 | { | |
504 | struct se_portal_group *se_tpg = se_sess->se_tpg; | |
9ac8928e | 505 | const struct target_core_fabric_ops *se_tfo; |
c66ac9db | 506 | struct se_node_acl *se_nacl; |
e63a8e19 | 507 | unsigned long flags; |
01468346 | 508 | bool comp_nacl = true; |
c66ac9db | 509 | |
6708bb27 | 510 | if (!se_tpg) { |
c66ac9db NB |
511 | transport_free_session(se_sess); |
512 | return; | |
513 | } | |
01468346 | 514 | se_tfo = se_tpg->se_tpg_tfo; |
c66ac9db | 515 | |
e63a8e19 | 516 | spin_lock_irqsave(&se_tpg->session_lock, flags); |
c66ac9db NB |
517 | list_del(&se_sess->sess_list); |
518 | se_sess->se_tpg = NULL; | |
519 | se_sess->fabric_sess_ptr = NULL; | |
e63a8e19 | 520 | spin_unlock_irqrestore(&se_tpg->session_lock, flags); |
c66ac9db NB |
521 | |
522 | /* | |
523 | * Determine if we need to do extra work for this initiator node's | |
524 | * struct se_node_acl if it had been previously dynamically generated. | |
525 | */ | |
526 | se_nacl = se_sess->se_node_acl; | |
01468346 NB |
527 | |
528 | spin_lock_irqsave(&se_tpg->acl_node_lock, flags); | |
529 | if (se_nacl && se_nacl->dynamic_node_acl) { | |
530 | if (!se_tfo->tpg_check_demo_mode_cache(se_tpg)) { | |
531 | list_del(&se_nacl->acl_list); | |
532 | se_tpg->num_node_acls--; | |
533 | spin_unlock_irqrestore(&se_tpg->acl_node_lock, flags); | |
534 | core_tpg_wait_for_nacl_pr_ref(se_nacl); | |
535 | core_free_device_list_for_node(se_nacl, se_tpg); | |
536 | se_tfo->tpg_release_fabric_acl(se_tpg, se_nacl); | |
537 | ||
538 | comp_nacl = false; | |
539 | spin_lock_irqsave(&se_tpg->acl_node_lock, flags); | |
c66ac9db | 540 | } |
c66ac9db | 541 | } |
01468346 | 542 | spin_unlock_irqrestore(&se_tpg->acl_node_lock, flags); |
c66ac9db | 543 | |
6708bb27 | 544 | pr_debug("TARGET_CORE[%s]: Deregistered fabric_sess\n", |
e3d6f909 | 545 | se_tpg->se_tpg_tfo->get_fabric_name()); |
01468346 | 546 | /* |
125d0119 | 547 | * If last kref is dropping now for an explicit NodeACL, awake sleeping |
afb999ff NB |
548 | * ->acl_free_comp caller to wakeup configfs se_node_acl->acl_group |
549 | * removal context. | |
01468346 | 550 | */ |
0bcc297e | 551 | if (se_nacl && comp_nacl) |
afb999ff | 552 | target_put_nacl(se_nacl); |
01468346 | 553 | |
afb999ff | 554 | transport_free_session(se_sess); |
c66ac9db NB |
555 | } |
556 | EXPORT_SYMBOL(transport_deregister_session); | |
557 | ||
558 | /* | |
a1d8b49a | 559 | * Called with cmd->t_state_lock held. |
c66ac9db | 560 | */ |
cf572a96 | 561 | static void target_remove_from_state_list(struct se_cmd *cmd) |
c66ac9db | 562 | { |
42bf829e | 563 | struct se_device *dev = cmd->se_dev; |
c66ac9db NB |
564 | unsigned long flags; |
565 | ||
42bf829e CH |
566 | if (!dev) |
567 | return; | |
c66ac9db | 568 | |
cf572a96 CH |
569 | if (cmd->transport_state & CMD_T_BUSY) |
570 | return; | |
c66ac9db | 571 | |
cf572a96 CH |
572 | spin_lock_irqsave(&dev->execute_task_lock, flags); |
573 | if (cmd->state_active) { | |
574 | list_del(&cmd->state_list); | |
cf572a96 | 575 | cmd->state_active = false; |
c66ac9db | 576 | } |
cf572a96 | 577 | spin_unlock_irqrestore(&dev->execute_task_lock, flags); |
c66ac9db NB |
578 | } |
579 | ||
862e6389 NB |
580 | static int transport_cmd_check_stop(struct se_cmd *cmd, bool remove_from_lists, |
581 | bool write_pending) | |
c66ac9db NB |
582 | { |
583 | unsigned long flags; | |
584 | ||
a1d8b49a | 585 | spin_lock_irqsave(&cmd->t_state_lock, flags); |
862e6389 NB |
586 | if (write_pending) |
587 | cmd->t_state = TRANSPORT_WRITE_PENDING; | |
588 | ||
f7113a47 CH |
589 | if (remove_from_lists) { |
590 | target_remove_from_state_list(cmd); | |
591 | ||
592 | /* | |
593 | * Clear struct se_cmd->se_lun before the handoff to FE. | |
594 | */ | |
595 | cmd->se_lun = NULL; | |
596 | } | |
597 | ||
c66ac9db NB |
598 | /* |
599 | * Determine if frontend context caller is requesting the stopping of | |
e3d6f909 | 600 | * this command for frontend exceptions. |
c66ac9db | 601 | */ |
7d680f3b CH |
602 | if (cmd->transport_state & CMD_T_STOP) { |
603 | pr_debug("%s:%d CMD_T_STOP for ITT: 0x%08x\n", | |
604 | __func__, __LINE__, | |
e3d6f909 | 605 | cmd->se_tfo->get_task_tag(cmd)); |
c66ac9db | 606 | |
a1d8b49a | 607 | spin_unlock_irqrestore(&cmd->t_state_lock, flags); |
c66ac9db | 608 | |
a95d6511 | 609 | complete_all(&cmd->t_transport_stop_comp); |
c66ac9db NB |
610 | return 1; |
611 | } | |
f7113a47 CH |
612 | |
613 | cmd->transport_state &= ~CMD_T_ACTIVE; | |
614 | if (remove_from_lists) { | |
615 | /* | |
616 | * Some fabric modules like tcm_loop can release | |
617 | * their internally allocated I/O reference now and | |
618 | * struct se_cmd now. | |
619 | * | |
620 | * Fabric modules are expected to return '1' here if the | |
621 | * se_cmd being passed is released at this point, | |
622 | * or zero if not being released. | |
623 | */ | |
624 | if (cmd->se_tfo->check_stop_free != NULL) { | |
625 | spin_unlock_irqrestore(&cmd->t_state_lock, flags); | |
626 | return cmd->se_tfo->check_stop_free(cmd); | |
c66ac9db | 627 | } |
f7113a47 | 628 | } |
c66ac9db | 629 | |
a1d8b49a | 630 | spin_unlock_irqrestore(&cmd->t_state_lock, flags); |
c66ac9db NB |
631 | return 0; |
632 | } | |
633 | ||
634 | static int transport_cmd_check_stop_to_fabric(struct se_cmd *cmd) | |
635 | { | |
862e6389 | 636 | return transport_cmd_check_stop(cmd, true, false); |
c66ac9db NB |
637 | } |
638 | ||
639 | static void transport_lun_remove_cmd(struct se_cmd *cmd) | |
640 | { | |
e3d6f909 | 641 | struct se_lun *lun = cmd->se_lun; |
c66ac9db | 642 | |
5259a06e | 643 | if (!lun) |
c66ac9db NB |
644 | return; |
645 | ||
5259a06e NB |
646 | if (cmpxchg(&cmd->lun_ref_active, true, false)) |
647 | percpu_ref_put(&lun->lun_ref); | |
c66ac9db NB |
648 | } |
649 | ||
650 | void transport_cmd_finish_abort(struct se_cmd *cmd, int remove) | |
651 | { | |
68259b5a AL |
652 | if (cmd->se_cmd_flags & SCF_SE_LUN_CMD) |
653 | transport_lun_remove_cmd(cmd); | |
131e6abc NB |
654 | /* |
655 | * Allow the fabric driver to unmap any resources before | |
656 | * releasing the descriptor via TFO->release_cmd() | |
657 | */ | |
658 | if (remove) | |
659 | cmd->se_tfo->aborted_task(cmd); | |
68259b5a | 660 | |
c66ac9db NB |
661 | if (transport_cmd_check_stop_to_fabric(cmd)) |
662 | return; | |
af877292 | 663 | if (remove) |
e6a2573f | 664 | transport_put_cmd(cmd); |
c66ac9db NB |
665 | } |
666 | ||
35e0e757 CH |
667 | static void target_complete_failure_work(struct work_struct *work) |
668 | { | |
669 | struct se_cmd *cmd = container_of(work, struct se_cmd, work); | |
670 | ||
de103c93 CH |
671 | transport_generic_request_failure(cmd, |
672 | TCM_LOGICAL_UNIT_COMMUNICATION_FAILURE); | |
35e0e757 CH |
673 | } |
674 | ||
6138ed2a | 675 | /* |
d5829eac PB |
676 | * Used when asking transport to copy Sense Data from the underlying |
677 | * Linux/SCSI struct scsi_cmnd | |
6138ed2a | 678 | */ |
d5829eac | 679 | static unsigned char *transport_get_sense_buffer(struct se_cmd *cmd) |
6138ed2a | 680 | { |
6138ed2a | 681 | struct se_device *dev = cmd->se_dev; |
6138ed2a PB |
682 | |
683 | WARN_ON(!cmd->se_lun); | |
684 | ||
685 | if (!dev) | |
d5829eac | 686 | return NULL; |
6138ed2a | 687 | |
d5829eac PB |
688 | if (cmd->se_cmd_flags & SCF_SENT_CHECK_CONDITION) |
689 | return NULL; | |
6138ed2a | 690 | |
9c58b7dd | 691 | cmd->scsi_sense_length = TRANSPORT_SENSE_BUFFER; |
6138ed2a | 692 | |
d5829eac | 693 | pr_debug("HBA_[%u]_PLUG[%s]: Requesting sense for SAM STATUS: 0x%02x\n", |
6138ed2a | 694 | dev->se_hba->hba_id, dev->transport->name, cmd->scsi_status); |
9c58b7dd | 695 | return cmd->sense_buffer; |
6138ed2a PB |
696 | } |
697 | ||
5787cacd | 698 | void target_complete_cmd(struct se_cmd *cmd, u8 scsi_status) |
c66ac9db | 699 | { |
42bf829e | 700 | struct se_device *dev = cmd->se_dev; |
5787cacd | 701 | int success = scsi_status == GOOD; |
c66ac9db | 702 | unsigned long flags; |
c66ac9db | 703 | |
5787cacd CH |
704 | cmd->scsi_status = scsi_status; |
705 | ||
706 | ||
a1d8b49a | 707 | spin_lock_irqsave(&cmd->t_state_lock, flags); |
cf572a96 | 708 | cmd->transport_state &= ~CMD_T_BUSY; |
c66ac9db | 709 | |
c66ac9db | 710 | if (dev && dev->transport->transport_complete) { |
d5829eac PB |
711 | dev->transport->transport_complete(cmd, |
712 | cmd->t_data_sg, | |
713 | transport_get_sense_buffer(cmd)); | |
714 | if (cmd->se_cmd_flags & SCF_TRANSPORT_TASK_SENSE) | |
c66ac9db | 715 | success = 1; |
c66ac9db NB |
716 | } |
717 | ||
718 | /* | |
5787cacd | 719 | * See if we are waiting to complete for an exception condition. |
c66ac9db | 720 | */ |
cf572a96 | 721 | if (cmd->transport_state & CMD_T_REQUEST_STOP) { |
a1d8b49a | 722 | spin_unlock_irqrestore(&cmd->t_state_lock, flags); |
cf572a96 | 723 | complete(&cmd->task_stop_comp); |
c66ac9db NB |
724 | return; |
725 | } | |
2235007c | 726 | |
3d28934a | 727 | /* |
125d0119 | 728 | * Check for case where an explicit ABORT_TASK has been received |
3d28934a NB |
729 | * and transport_wait_for_tasks() will be waiting for completion.. |
730 | */ | |
731 | if (cmd->transport_state & CMD_T_ABORTED && | |
732 | cmd->transport_state & CMD_T_STOP) { | |
733 | spin_unlock_irqrestore(&cmd->t_state_lock, flags); | |
a95d6511 | 734 | complete_all(&cmd->t_transport_stop_comp); |
3d28934a | 735 | return; |
3dca1471 | 736 | } else if (!success) { |
35e0e757 | 737 | INIT_WORK(&cmd->work, target_complete_failure_work); |
c66ac9db | 738 | } else { |
35e0e757 | 739 | INIT_WORK(&cmd->work, target_complete_ok_work); |
c66ac9db | 740 | } |
35e0e757 | 741 | |
35e0e757 | 742 | cmd->t_state = TRANSPORT_COMPLETE; |
3d28934a | 743 | cmd->transport_state |= (CMD_T_COMPLETE | CMD_T_ACTIVE); |
a1d8b49a | 744 | spin_unlock_irqrestore(&cmd->t_state_lock, flags); |
c66ac9db | 745 | |
35e0e757 | 746 | queue_work(target_completion_wq, &cmd->work); |
c66ac9db | 747 | } |
6bb35e00 CH |
748 | EXPORT_SYMBOL(target_complete_cmd); |
749 | ||
2426bd45 RD |
750 | void target_complete_cmd_with_length(struct se_cmd *cmd, u8 scsi_status, int length) |
751 | { | |
752 | if (scsi_status == SAM_STAT_GOOD && length < cmd->data_length) { | |
753 | if (cmd->se_cmd_flags & SCF_UNDERFLOW_BIT) { | |
754 | cmd->residual_count += cmd->data_length - length; | |
755 | } else { | |
756 | cmd->se_cmd_flags |= SCF_UNDERFLOW_BIT; | |
757 | cmd->residual_count = cmd->data_length - length; | |
758 | } | |
759 | ||
760 | cmd->data_length = length; | |
761 | } | |
762 | ||
763 | target_complete_cmd(cmd, scsi_status); | |
764 | } | |
765 | EXPORT_SYMBOL(target_complete_cmd_with_length); | |
766 | ||
cf572a96 | 767 | static void target_add_to_state_list(struct se_cmd *cmd) |
c66ac9db | 768 | { |
cf572a96 CH |
769 | struct se_device *dev = cmd->se_dev; |
770 | unsigned long flags; | |
c66ac9db | 771 | |
cf572a96 CH |
772 | spin_lock_irqsave(&dev->execute_task_lock, flags); |
773 | if (!cmd->state_active) { | |
774 | list_add_tail(&cmd->state_list, &dev->state_list); | |
775 | cmd->state_active = true; | |
c66ac9db | 776 | } |
cf572a96 | 777 | spin_unlock_irqrestore(&dev->execute_task_lock, flags); |
c66ac9db NB |
778 | } |
779 | ||
07bde79a | 780 | /* |
f147abb4 | 781 | * Handle QUEUE_FULL / -EAGAIN and -ENOMEM status |
07bde79a | 782 | */ |
7a6f0a1e CH |
783 | static void transport_write_pending_qf(struct se_cmd *cmd); |
784 | static void transport_complete_qf(struct se_cmd *cmd); | |
07bde79a | 785 | |
0fd97ccf | 786 | void target_qf_do_work(struct work_struct *work) |
07bde79a NB |
787 | { |
788 | struct se_device *dev = container_of(work, struct se_device, | |
789 | qf_work_queue); | |
bcac364a | 790 | LIST_HEAD(qf_cmd_list); |
07bde79a NB |
791 | struct se_cmd *cmd, *cmd_tmp; |
792 | ||
793 | spin_lock_irq(&dev->qf_cmd_lock); | |
bcac364a RD |
794 | list_splice_init(&dev->qf_cmd_list, &qf_cmd_list); |
795 | spin_unlock_irq(&dev->qf_cmd_lock); | |
07bde79a | 796 | |
bcac364a | 797 | list_for_each_entry_safe(cmd, cmd_tmp, &qf_cmd_list, se_qf_node) { |
07bde79a | 798 | list_del(&cmd->se_qf_node); |
33940d09 | 799 | atomic_dec_mb(&dev->dev_qf_count); |
07bde79a | 800 | |
6708bb27 | 801 | pr_debug("Processing %s cmd: %p QUEUE_FULL in work queue" |
07bde79a | 802 | " context: %s\n", cmd->se_tfo->get_fabric_name(), cmd, |
e057f533 | 803 | (cmd->t_state == TRANSPORT_COMPLETE_QF_OK) ? "COMPLETE_OK" : |
07bde79a NB |
804 | (cmd->t_state == TRANSPORT_COMPLETE_QF_WP) ? "WRITE_PENDING" |
805 | : "UNKNOWN"); | |
f7a5cc0b | 806 | |
7a6f0a1e CH |
807 | if (cmd->t_state == TRANSPORT_COMPLETE_QF_WP) |
808 | transport_write_pending_qf(cmd); | |
809 | else if (cmd->t_state == TRANSPORT_COMPLETE_QF_OK) | |
810 | transport_complete_qf(cmd); | |
07bde79a | 811 | } |
07bde79a NB |
812 | } |
813 | ||
c66ac9db NB |
814 | unsigned char *transport_dump_cmd_direction(struct se_cmd *cmd) |
815 | { | |
816 | switch (cmd->data_direction) { | |
817 | case DMA_NONE: | |
818 | return "NONE"; | |
819 | case DMA_FROM_DEVICE: | |
820 | return "READ"; | |
821 | case DMA_TO_DEVICE: | |
822 | return "WRITE"; | |
823 | case DMA_BIDIRECTIONAL: | |
824 | return "BIDI"; | |
825 | default: | |
826 | break; | |
827 | } | |
828 | ||
829 | return "UNKNOWN"; | |
830 | } | |
831 | ||
832 | void transport_dump_dev_state( | |
833 | struct se_device *dev, | |
834 | char *b, | |
835 | int *bl) | |
836 | { | |
837 | *bl += sprintf(b + *bl, "Status: "); | |
0fd97ccf | 838 | if (dev->export_count) |
c66ac9db | 839 | *bl += sprintf(b + *bl, "ACTIVATED"); |
0fd97ccf | 840 | else |
c66ac9db | 841 | *bl += sprintf(b + *bl, "DEACTIVATED"); |
c66ac9db | 842 | |
5f41a31d | 843 | *bl += sprintf(b + *bl, " Max Queue Depth: %d", dev->queue_depth); |
11e764bd | 844 | *bl += sprintf(b + *bl, " SectorSize: %u HwMaxSectors: %u\n", |
0fd97ccf CH |
845 | dev->dev_attrib.block_size, |
846 | dev->dev_attrib.hw_max_sectors); | |
c66ac9db NB |
847 | *bl += sprintf(b + *bl, " "); |
848 | } | |
849 | ||
c66ac9db NB |
850 | void transport_dump_vpd_proto_id( |
851 | struct t10_vpd *vpd, | |
852 | unsigned char *p_buf, | |
853 | int p_buf_len) | |
854 | { | |
855 | unsigned char buf[VPD_TMP_BUF_SIZE]; | |
856 | int len; | |
857 | ||
858 | memset(buf, 0, VPD_TMP_BUF_SIZE); | |
859 | len = sprintf(buf, "T10 VPD Protocol Identifier: "); | |
860 | ||
861 | switch (vpd->protocol_identifier) { | |
862 | case 0x00: | |
863 | sprintf(buf+len, "Fibre Channel\n"); | |
864 | break; | |
865 | case 0x10: | |
866 | sprintf(buf+len, "Parallel SCSI\n"); | |
867 | break; | |
868 | case 0x20: | |
869 | sprintf(buf+len, "SSA\n"); | |
870 | break; | |
871 | case 0x30: | |
872 | sprintf(buf+len, "IEEE 1394\n"); | |
873 | break; | |
874 | case 0x40: | |
875 | sprintf(buf+len, "SCSI Remote Direct Memory Access" | |
876 | " Protocol\n"); | |
877 | break; | |
878 | case 0x50: | |
879 | sprintf(buf+len, "Internet SCSI (iSCSI)\n"); | |
880 | break; | |
881 | case 0x60: | |
882 | sprintf(buf+len, "SAS Serial SCSI Protocol\n"); | |
883 | break; | |
884 | case 0x70: | |
885 | sprintf(buf+len, "Automation/Drive Interface Transport" | |
886 | " Protocol\n"); | |
887 | break; | |
888 | case 0x80: | |
889 | sprintf(buf+len, "AT Attachment Interface ATA/ATAPI\n"); | |
890 | break; | |
891 | default: | |
892 | sprintf(buf+len, "Unknown 0x%02x\n", | |
893 | vpd->protocol_identifier); | |
894 | break; | |
895 | } | |
896 | ||
897 | if (p_buf) | |
898 | strncpy(p_buf, buf, p_buf_len); | |
899 | else | |
6708bb27 | 900 | pr_debug("%s", buf); |
c66ac9db NB |
901 | } |
902 | ||
903 | void | |
904 | transport_set_vpd_proto_id(struct t10_vpd *vpd, unsigned char *page_83) | |
905 | { | |
906 | /* | |
907 | * Check if the Protocol Identifier Valid (PIV) bit is set.. | |
908 | * | |
909 | * from spc3r23.pdf section 7.5.1 | |
910 | */ | |
911 | if (page_83[1] & 0x80) { | |
912 | vpd->protocol_identifier = (page_83[0] & 0xf0); | |
913 | vpd->protocol_identifier_set = 1; | |
914 | transport_dump_vpd_proto_id(vpd, NULL, 0); | |
915 | } | |
916 | } | |
917 | EXPORT_SYMBOL(transport_set_vpd_proto_id); | |
918 | ||
919 | int transport_dump_vpd_assoc( | |
920 | struct t10_vpd *vpd, | |
921 | unsigned char *p_buf, | |
922 | int p_buf_len) | |
923 | { | |
924 | unsigned char buf[VPD_TMP_BUF_SIZE]; | |
e3d6f909 AG |
925 | int ret = 0; |
926 | int len; | |
c66ac9db NB |
927 | |
928 | memset(buf, 0, VPD_TMP_BUF_SIZE); | |
929 | len = sprintf(buf, "T10 VPD Identifier Association: "); | |
930 | ||
931 | switch (vpd->association) { | |
932 | case 0x00: | |
933 | sprintf(buf+len, "addressed logical unit\n"); | |
934 | break; | |
935 | case 0x10: | |
936 | sprintf(buf+len, "target port\n"); | |
937 | break; | |
938 | case 0x20: | |
939 | sprintf(buf+len, "SCSI target device\n"); | |
940 | break; | |
941 | default: | |
942 | sprintf(buf+len, "Unknown 0x%02x\n", vpd->association); | |
e3d6f909 | 943 | ret = -EINVAL; |
c66ac9db NB |
944 | break; |
945 | } | |
946 | ||
947 | if (p_buf) | |
948 | strncpy(p_buf, buf, p_buf_len); | |
949 | else | |
6708bb27 | 950 | pr_debug("%s", buf); |
c66ac9db NB |
951 | |
952 | return ret; | |
953 | } | |
954 | ||
955 | int transport_set_vpd_assoc(struct t10_vpd *vpd, unsigned char *page_83) | |
956 | { | |
957 | /* | |
958 | * The VPD identification association.. | |
959 | * | |
960 | * from spc3r23.pdf Section 7.6.3.1 Table 297 | |
961 | */ | |
962 | vpd->association = (page_83[1] & 0x30); | |
963 | return transport_dump_vpd_assoc(vpd, NULL, 0); | |
964 | } | |
965 | EXPORT_SYMBOL(transport_set_vpd_assoc); | |
966 | ||
967 | int transport_dump_vpd_ident_type( | |
968 | struct t10_vpd *vpd, | |
969 | unsigned char *p_buf, | |
970 | int p_buf_len) | |
971 | { | |
972 | unsigned char buf[VPD_TMP_BUF_SIZE]; | |
e3d6f909 AG |
973 | int ret = 0; |
974 | int len; | |
c66ac9db NB |
975 | |
976 | memset(buf, 0, VPD_TMP_BUF_SIZE); | |
977 | len = sprintf(buf, "T10 VPD Identifier Type: "); | |
978 | ||
979 | switch (vpd->device_identifier_type) { | |
980 | case 0x00: | |
981 | sprintf(buf+len, "Vendor specific\n"); | |
982 | break; | |
983 | case 0x01: | |
984 | sprintf(buf+len, "T10 Vendor ID based\n"); | |
985 | break; | |
986 | case 0x02: | |
987 | sprintf(buf+len, "EUI-64 based\n"); | |
988 | break; | |
989 | case 0x03: | |
990 | sprintf(buf+len, "NAA\n"); | |
991 | break; | |
992 | case 0x04: | |
993 | sprintf(buf+len, "Relative target port identifier\n"); | |
994 | break; | |
995 | case 0x08: | |
996 | sprintf(buf+len, "SCSI name string\n"); | |
997 | break; | |
998 | default: | |
999 | sprintf(buf+len, "Unsupported: 0x%02x\n", | |
1000 | vpd->device_identifier_type); | |
e3d6f909 | 1001 | ret = -EINVAL; |
c66ac9db NB |
1002 | break; |
1003 | } | |
1004 | ||
e3d6f909 AG |
1005 | if (p_buf) { |
1006 | if (p_buf_len < strlen(buf)+1) | |
1007 | return -EINVAL; | |
c66ac9db | 1008 | strncpy(p_buf, buf, p_buf_len); |
e3d6f909 | 1009 | } else { |
6708bb27 | 1010 | pr_debug("%s", buf); |
e3d6f909 | 1011 | } |
c66ac9db NB |
1012 | |
1013 | return ret; | |
1014 | } | |
1015 | ||
1016 | int transport_set_vpd_ident_type(struct t10_vpd *vpd, unsigned char *page_83) | |
1017 | { | |
1018 | /* | |
1019 | * The VPD identifier type.. | |
1020 | * | |
1021 | * from spc3r23.pdf Section 7.6.3.1 Table 298 | |
1022 | */ | |
1023 | vpd->device_identifier_type = (page_83[1] & 0x0f); | |
1024 | return transport_dump_vpd_ident_type(vpd, NULL, 0); | |
1025 | } | |
1026 | EXPORT_SYMBOL(transport_set_vpd_ident_type); | |
1027 | ||
1028 | int transport_dump_vpd_ident( | |
1029 | struct t10_vpd *vpd, | |
1030 | unsigned char *p_buf, | |
1031 | int p_buf_len) | |
1032 | { | |
1033 | unsigned char buf[VPD_TMP_BUF_SIZE]; | |
1034 | int ret = 0; | |
1035 | ||
1036 | memset(buf, 0, VPD_TMP_BUF_SIZE); | |
1037 | ||
1038 | switch (vpd->device_identifier_code_set) { | |
1039 | case 0x01: /* Binary */ | |
703d641d DC |
1040 | snprintf(buf, sizeof(buf), |
1041 | "T10 VPD Binary Device Identifier: %s\n", | |
c66ac9db NB |
1042 | &vpd->device_identifier[0]); |
1043 | break; | |
1044 | case 0x02: /* ASCII */ | |
703d641d DC |
1045 | snprintf(buf, sizeof(buf), |
1046 | "T10 VPD ASCII Device Identifier: %s\n", | |
c66ac9db NB |
1047 | &vpd->device_identifier[0]); |
1048 | break; | |
1049 | case 0x03: /* UTF-8 */ | |
703d641d DC |
1050 | snprintf(buf, sizeof(buf), |
1051 | "T10 VPD UTF-8 Device Identifier: %s\n", | |
c66ac9db NB |
1052 | &vpd->device_identifier[0]); |
1053 | break; | |
1054 | default: | |
1055 | sprintf(buf, "T10 VPD Device Identifier encoding unsupported:" | |
1056 | " 0x%02x", vpd->device_identifier_code_set); | |
e3d6f909 | 1057 | ret = -EINVAL; |
c66ac9db NB |
1058 | break; |
1059 | } | |
1060 | ||
1061 | if (p_buf) | |
1062 | strncpy(p_buf, buf, p_buf_len); | |
1063 | else | |
6708bb27 | 1064 | pr_debug("%s", buf); |
c66ac9db NB |
1065 | |
1066 | return ret; | |
1067 | } | |
1068 | ||
1069 | int | |
1070 | transport_set_vpd_ident(struct t10_vpd *vpd, unsigned char *page_83) | |
1071 | { | |
1072 | static const char hex_str[] = "0123456789abcdef"; | |
35d1efe8 | 1073 | int j = 0, i = 4; /* offset to start of the identifier */ |
c66ac9db NB |
1074 | |
1075 | /* | |
1076 | * The VPD Code Set (encoding) | |
1077 | * | |
1078 | * from spc3r23.pdf Section 7.6.3.1 Table 296 | |
1079 | */ | |
1080 | vpd->device_identifier_code_set = (page_83[0] & 0x0f); | |
1081 | switch (vpd->device_identifier_code_set) { | |
1082 | case 0x01: /* Binary */ | |
1083 | vpd->device_identifier[j++] = | |
1084 | hex_str[vpd->device_identifier_type]; | |
1085 | while (i < (4 + page_83[3])) { | |
1086 | vpd->device_identifier[j++] = | |
1087 | hex_str[(page_83[i] & 0xf0) >> 4]; | |
1088 | vpd->device_identifier[j++] = | |
1089 | hex_str[page_83[i] & 0x0f]; | |
1090 | i++; | |
1091 | } | |
1092 | break; | |
1093 | case 0x02: /* ASCII */ | |
1094 | case 0x03: /* UTF-8 */ | |
1095 | while (i < (4 + page_83[3])) | |
1096 | vpd->device_identifier[j++] = page_83[i++]; | |
1097 | break; | |
1098 | default: | |
1099 | break; | |
1100 | } | |
1101 | ||
1102 | return transport_dump_vpd_ident(vpd, NULL, 0); | |
1103 | } | |
1104 | EXPORT_SYMBOL(transport_set_vpd_ident); | |
1105 | ||
de103c93 CH |
1106 | sense_reason_t |
1107 | target_cmd_size_check(struct se_cmd *cmd, unsigned int size) | |
9b3b8041 CH |
1108 | { |
1109 | struct se_device *dev = cmd->se_dev; | |
1110 | ||
1111 | if (cmd->unknown_data_length) { | |
1112 | cmd->data_length = size; | |
1113 | } else if (size != cmd->data_length) { | |
1114 | pr_warn("TARGET_CORE[%s]: Expected Transfer Length:" | |
1115 | " %u does not match SCSI CDB Length: %u for SAM Opcode:" | |
1116 | " 0x%02x\n", cmd->se_tfo->get_fabric_name(), | |
1117 | cmd->data_length, size, cmd->t_task_cdb[0]); | |
1118 | ||
9b3b8041 CH |
1119 | if (cmd->data_direction == DMA_TO_DEVICE) { |
1120 | pr_err("Rejecting underflow/overflow" | |
1121 | " WRITE data\n"); | |
de103c93 | 1122 | return TCM_INVALID_CDB_FIELD; |
9b3b8041 CH |
1123 | } |
1124 | /* | |
1125 | * Reject READ_* or WRITE_* with overflow/underflow for | |
1126 | * type SCF_SCSI_DATA_CDB. | |
1127 | */ | |
0fd97ccf | 1128 | if (dev->dev_attrib.block_size != 512) { |
9b3b8041 CH |
1129 | pr_err("Failing OVERFLOW/UNDERFLOW for LBA op" |
1130 | " CDB on non 512-byte sector setup subsystem" | |
1131 | " plugin: %s\n", dev->transport->name); | |
1132 | /* Returns CHECK_CONDITION + INVALID_CDB_FIELD */ | |
de103c93 | 1133 | return TCM_INVALID_CDB_FIELD; |
9b3b8041 | 1134 | } |
4c054ba6 NB |
1135 | /* |
1136 | * For the overflow case keep the existing fabric provided | |
1137 | * ->data_length. Otherwise for the underflow case, reset | |
1138 | * ->data_length to the smaller SCSI expected data transfer | |
1139 | * length. | |
1140 | */ | |
9b3b8041 CH |
1141 | if (size > cmd->data_length) { |
1142 | cmd->se_cmd_flags |= SCF_OVERFLOW_BIT; | |
1143 | cmd->residual_count = (size - cmd->data_length); | |
1144 | } else { | |
1145 | cmd->se_cmd_flags |= SCF_UNDERFLOW_BIT; | |
1146 | cmd->residual_count = (cmd->data_length - size); | |
4c054ba6 | 1147 | cmd->data_length = size; |
9b3b8041 | 1148 | } |
9b3b8041 CH |
1149 | } |
1150 | ||
1151 | return 0; | |
1152 | ||
9b3b8041 CH |
1153 | } |
1154 | ||
c66ac9db NB |
1155 | /* |
1156 | * Used by fabric modules containing a local struct se_cmd within their | |
1157 | * fabric dependent per I/O descriptor. | |
1158 | */ | |
1159 | void transport_init_se_cmd( | |
1160 | struct se_cmd *cmd, | |
9ac8928e | 1161 | const struct target_core_fabric_ops *tfo, |
c66ac9db NB |
1162 | struct se_session *se_sess, |
1163 | u32 data_length, | |
1164 | int data_direction, | |
1165 | int task_attr, | |
1166 | unsigned char *sense_buffer) | |
1167 | { | |
5951146d | 1168 | INIT_LIST_HEAD(&cmd->se_delayed_node); |
07bde79a | 1169 | INIT_LIST_HEAD(&cmd->se_qf_node); |
a17f091d | 1170 | INIT_LIST_HEAD(&cmd->se_cmd_list); |
cf572a96 | 1171 | INIT_LIST_HEAD(&cmd->state_list); |
a1d8b49a | 1172 | init_completion(&cmd->t_transport_stop_comp); |
a17f091d | 1173 | init_completion(&cmd->cmd_wait_comp); |
cf572a96 | 1174 | init_completion(&cmd->task_stop_comp); |
a1d8b49a | 1175 | spin_lock_init(&cmd->t_state_lock); |
1e1110c4 | 1176 | kref_init(&cmd->cmd_kref); |
7d680f3b | 1177 | cmd->transport_state = CMD_T_DEV_ACTIVE; |
c66ac9db NB |
1178 | |
1179 | cmd->se_tfo = tfo; | |
1180 | cmd->se_sess = se_sess; | |
1181 | cmd->data_length = data_length; | |
1182 | cmd->data_direction = data_direction; | |
1183 | cmd->sam_task_attr = task_attr; | |
1184 | cmd->sense_buffer = sense_buffer; | |
cf572a96 CH |
1185 | |
1186 | cmd->state_active = false; | |
c66ac9db NB |
1187 | } |
1188 | EXPORT_SYMBOL(transport_init_se_cmd); | |
1189 | ||
de103c93 CH |
1190 | static sense_reason_t |
1191 | transport_check_alloc_task_attr(struct se_cmd *cmd) | |
c66ac9db | 1192 | { |
019c4ca6 CH |
1193 | struct se_device *dev = cmd->se_dev; |
1194 | ||
c66ac9db NB |
1195 | /* |
1196 | * Check if SAM Task Attribute emulation is enabled for this | |
1197 | * struct se_device storage object | |
1198 | */ | |
a3541703 | 1199 | if (dev->transport->transport_flags & TRANSPORT_FLAG_PASSTHROUGH) |
c66ac9db NB |
1200 | return 0; |
1201 | ||
68d81f40 | 1202 | if (cmd->sam_task_attr == TCM_ACA_TAG) { |
6708bb27 | 1203 | pr_debug("SAM Task Attribute ACA" |
c66ac9db | 1204 | " emulation is not supported\n"); |
de103c93 | 1205 | return TCM_INVALID_CDB_FIELD; |
c66ac9db NB |
1206 | } |
1207 | /* | |
1208 | * Used to determine when ORDERED commands should go from | |
1209 | * Dormant to Active status. | |
1210 | */ | |
019c4ca6 | 1211 | cmd->se_ordered_id = atomic_inc_return(&dev->dev_ordered_id); |
6708bb27 | 1212 | pr_debug("Allocated se_ordered_id: %u for Task Attr: 0x%02x on %s\n", |
c66ac9db | 1213 | cmd->se_ordered_id, cmd->sam_task_attr, |
019c4ca6 | 1214 | dev->transport->name); |
c66ac9db NB |
1215 | return 0; |
1216 | } | |
1217 | ||
de103c93 CH |
1218 | sense_reason_t |
1219 | target_setup_cmd_from_cdb(struct se_cmd *cmd, unsigned char *cdb) | |
c66ac9db | 1220 | { |
0fd97ccf | 1221 | struct se_device *dev = cmd->se_dev; |
de103c93 | 1222 | sense_reason_t ret; |
c66ac9db | 1223 | |
c66ac9db NB |
1224 | /* |
1225 | * Ensure that the received CDB is less than the max (252 + 8) bytes | |
1226 | * for VARIABLE_LENGTH_CMD | |
1227 | */ | |
1228 | if (scsi_command_size(cdb) > SCSI_MAX_VARLEN_CDB_SIZE) { | |
6708bb27 | 1229 | pr_err("Received SCSI CDB with command_size: %d that" |
c66ac9db NB |
1230 | " exceeds SCSI_MAX_VARLEN_CDB_SIZE: %d\n", |
1231 | scsi_command_size(cdb), SCSI_MAX_VARLEN_CDB_SIZE); | |
de103c93 | 1232 | return TCM_INVALID_CDB_FIELD; |
c66ac9db NB |
1233 | } |
1234 | /* | |
1235 | * If the received CDB is larger than TCM_MAX_COMMAND_SIZE, | |
1236 | * allocate the additional extended CDB buffer now.. Otherwise | |
1237 | * setup the pointer from __t_task_cdb to t_task_cdb. | |
1238 | */ | |
a1d8b49a AG |
1239 | if (scsi_command_size(cdb) > sizeof(cmd->__t_task_cdb)) { |
1240 | cmd->t_task_cdb = kzalloc(scsi_command_size(cdb), | |
c66ac9db | 1241 | GFP_KERNEL); |
6708bb27 AG |
1242 | if (!cmd->t_task_cdb) { |
1243 | pr_err("Unable to allocate cmd->t_task_cdb" | |
a1d8b49a | 1244 | " %u > sizeof(cmd->__t_task_cdb): %lu ops\n", |
c66ac9db | 1245 | scsi_command_size(cdb), |
a1d8b49a | 1246 | (unsigned long)sizeof(cmd->__t_task_cdb)); |
de103c93 | 1247 | return TCM_OUT_OF_RESOURCES; |
c66ac9db NB |
1248 | } |
1249 | } else | |
a1d8b49a | 1250 | cmd->t_task_cdb = &cmd->__t_task_cdb[0]; |
c66ac9db | 1251 | /* |
a1d8b49a | 1252 | * Copy the original CDB into cmd-> |
c66ac9db | 1253 | */ |
a1d8b49a | 1254 | memcpy(cmd->t_task_cdb, cdb, scsi_command_size(cdb)); |
cb4f4d3c | 1255 | |
e5c0d6ad RD |
1256 | trace_target_sequencer_start(cmd); |
1257 | ||
cb4f4d3c CH |
1258 | /* |
1259 | * Check for an existing UNIT ATTENTION condition | |
1260 | */ | |
de103c93 CH |
1261 | ret = target_scsi3_ua_check(cmd); |
1262 | if (ret) | |
1263 | return ret; | |
cb4f4d3c | 1264 | |
c87fbd56 | 1265 | ret = target_alua_state_check(cmd); |
de103c93 CH |
1266 | if (ret) |
1267 | return ret; | |
cb4f4d3c | 1268 | |
d977f437 | 1269 | ret = target_check_reservation(cmd); |
f85eda8d NB |
1270 | if (ret) { |
1271 | cmd->scsi_status = SAM_STAT_RESERVATION_CONFLICT; | |
d977f437 | 1272 | return ret; |
f85eda8d | 1273 | } |
cb4f4d3c | 1274 | |
0fd97ccf | 1275 | ret = dev->transport->parse_cdb(cmd); |
de103c93 CH |
1276 | if (ret) |
1277 | return ret; | |
1278 | ||
1279 | ret = transport_check_alloc_task_attr(cmd); | |
1280 | if (ret) | |
c66ac9db | 1281 | return ret; |
cb4f4d3c | 1282 | |
cb4f4d3c | 1283 | cmd->se_cmd_flags |= SCF_SUPPORTED_SAM_OPCODE; |
cb4f4d3c | 1284 | |
c66ac9db NB |
1285 | spin_lock(&cmd->se_lun->lun_sep_lock); |
1286 | if (cmd->se_lun->lun_sep) | |
1287 | cmd->se_lun->lun_sep->sep_stats.cmd_pdus++; | |
1288 | spin_unlock(&cmd->se_lun->lun_sep_lock); | |
1289 | return 0; | |
1290 | } | |
a12f41f8 | 1291 | EXPORT_SYMBOL(target_setup_cmd_from_cdb); |
c66ac9db | 1292 | |
695434e1 NB |
1293 | /* |
1294 | * Used by fabric module frontends to queue tasks directly. | |
1295 | * Many only be used from process context only | |
1296 | */ | |
1297 | int transport_handle_cdb_direct( | |
1298 | struct se_cmd *cmd) | |
1299 | { | |
de103c93 | 1300 | sense_reason_t ret; |
dd8ae59d | 1301 | |
695434e1 NB |
1302 | if (!cmd->se_lun) { |
1303 | dump_stack(); | |
6708bb27 | 1304 | pr_err("cmd->se_lun is NULL\n"); |
695434e1 NB |
1305 | return -EINVAL; |
1306 | } | |
1307 | if (in_interrupt()) { | |
1308 | dump_stack(); | |
6708bb27 | 1309 | pr_err("transport_generic_handle_cdb cannot be called" |
695434e1 NB |
1310 | " from interrupt context\n"); |
1311 | return -EINVAL; | |
1312 | } | |
dd8ae59d | 1313 | /* |
af877292 CH |
1314 | * Set TRANSPORT_NEW_CMD state and CMD_T_ACTIVE to ensure that |
1315 | * outstanding descriptors are handled correctly during shutdown via | |
1316 | * transport_wait_for_tasks() | |
dd8ae59d NB |
1317 | * |
1318 | * Also, we don't take cmd->t_state_lock here as we only expect | |
1319 | * this to be called for initial descriptor submission. | |
1320 | */ | |
1321 | cmd->t_state = TRANSPORT_NEW_CMD; | |
7d680f3b CH |
1322 | cmd->transport_state |= CMD_T_ACTIVE; |
1323 | ||
dd8ae59d NB |
1324 | /* |
1325 | * transport_generic_new_cmd() is already handling QUEUE_FULL, | |
1326 | * so follow TRANSPORT_NEW_CMD processing thread context usage | |
1327 | * and call transport_generic_request_failure() if necessary.. | |
1328 | */ | |
1329 | ret = transport_generic_new_cmd(cmd); | |
de103c93 CH |
1330 | if (ret) |
1331 | transport_generic_request_failure(cmd, ret); | |
dd8ae59d | 1332 | return 0; |
695434e1 NB |
1333 | } |
1334 | EXPORT_SYMBOL(transport_handle_cdb_direct); | |
1335 | ||
c5ff8d6b | 1336 | sense_reason_t |
de103c93 CH |
1337 | transport_generic_map_mem_to_cmd(struct se_cmd *cmd, struct scatterlist *sgl, |
1338 | u32 sgl_count, struct scatterlist *sgl_bidi, u32 sgl_bidi_count) | |
1339 | { | |
1340 | if (!sgl || !sgl_count) | |
1341 | return 0; | |
1342 | ||
1343 | /* | |
1344 | * Reject SCSI data overflow with map_mem_to_cmd() as incoming | |
1345 | * scatterlists already have been set to follow what the fabric | |
1346 | * passes for the original expected data transfer length. | |
1347 | */ | |
1348 | if (cmd->se_cmd_flags & SCF_OVERFLOW_BIT) { | |
1349 | pr_warn("Rejecting SCSI DATA overflow for fabric using" | |
1350 | " SCF_PASSTHROUGH_SG_TO_MEM_NOALLOC\n"); | |
1351 | return TCM_INVALID_CDB_FIELD; | |
1352 | } | |
1353 | ||
1354 | cmd->t_data_sg = sgl; | |
1355 | cmd->t_data_nents = sgl_count; | |
b32bd0a8 IT |
1356 | cmd->t_bidi_data_sg = sgl_bidi; |
1357 | cmd->t_bidi_data_nents = sgl_bidi_count; | |
de103c93 | 1358 | |
de103c93 CH |
1359 | cmd->se_cmd_flags |= SCF_PASSTHROUGH_SG_TO_MEM_NOALLOC; |
1360 | return 0; | |
1361 | } | |
1362 | ||
a026757f NB |
1363 | /* |
1364 | * target_submit_cmd_map_sgls - lookup unpacked lun and submit uninitialized | |
1365 | * se_cmd + use pre-allocated SGL memory. | |
a6360785 NB |
1366 | * |
1367 | * @se_cmd: command descriptor to submit | |
1368 | * @se_sess: associated se_sess for endpoint | |
1369 | * @cdb: pointer to SCSI CDB | |
1370 | * @sense: pointer to SCSI sense buffer | |
1371 | * @unpacked_lun: unpacked LUN to reference for struct se_lun | |
1372 | * @data_length: fabric expected data transfer length | |
1373 | * @task_addr: SAM task attribute | |
1374 | * @data_dir: DMA data direction | |
1375 | * @flags: flags for command submission from target_sc_flags_tables | |
a026757f NB |
1376 | * @sgl: struct scatterlist memory for unidirectional mapping |
1377 | * @sgl_count: scatterlist count for unidirectional mapping | |
1378 | * @sgl_bidi: struct scatterlist memory for bidirectional READ mapping | |
1379 | * @sgl_bidi_count: scatterlist count for bidirectional READ mapping | |
def2b339 NB |
1380 | * @sgl_prot: struct scatterlist memory protection information |
1381 | * @sgl_prot_count: scatterlist count for protection information | |
a6360785 | 1382 | * |
d6dfc868 RD |
1383 | * Returns non zero to signal active I/O shutdown failure. All other |
1384 | * setup exceptions will be returned as a SCSI CHECK_CONDITION response, | |
1385 | * but still return zero here. | |
1386 | * | |
a6360785 NB |
1387 | * This may only be called from process context, and also currently |
1388 | * assumes internal allocation of fabric payload buffer by target-core. | |
a026757f NB |
1389 | */ |
1390 | int target_submit_cmd_map_sgls(struct se_cmd *se_cmd, struct se_session *se_sess, | |
a6360785 | 1391 | unsigned char *cdb, unsigned char *sense, u32 unpacked_lun, |
a026757f NB |
1392 | u32 data_length, int task_attr, int data_dir, int flags, |
1393 | struct scatterlist *sgl, u32 sgl_count, | |
def2b339 NB |
1394 | struct scatterlist *sgl_bidi, u32 sgl_bidi_count, |
1395 | struct scatterlist *sgl_prot, u32 sgl_prot_count) | |
a6360785 NB |
1396 | { |
1397 | struct se_portal_group *se_tpg; | |
de103c93 CH |
1398 | sense_reason_t rc; |
1399 | int ret; | |
a6360785 NB |
1400 | |
1401 | se_tpg = se_sess->se_tpg; | |
1402 | BUG_ON(!se_tpg); | |
1403 | BUG_ON(se_cmd->se_tfo || se_cmd->se_sess); | |
1404 | BUG_ON(in_interrupt()); | |
1405 | /* | |
1406 | * Initialize se_cmd for target operation. From this point | |
1407 | * exceptions are handled by sending exception status via | |
1408 | * target_core_fabric_ops->queue_status() callback | |
1409 | */ | |
1410 | transport_init_se_cmd(se_cmd, se_tpg->se_tpg_tfo, se_sess, | |
1411 | data_length, data_dir, task_attr, sense); | |
b0d79946 SAS |
1412 | if (flags & TARGET_SCF_UNKNOWN_SIZE) |
1413 | se_cmd->unknown_data_length = 1; | |
a6360785 NB |
1414 | /* |
1415 | * Obtain struct se_cmd->cmd_kref reference and add new cmd to | |
1416 | * se_sess->sess_cmd_list. A second kref_get here is necessary | |
1417 | * for fabrics using TARGET_SCF_ACK_KREF that expect a second | |
1418 | * kref_put() to happen during fabric packet acknowledgement. | |
1419 | */ | |
de103c93 CH |
1420 | ret = target_get_sess_cmd(se_sess, se_cmd, (flags & TARGET_SCF_ACK_KREF)); |
1421 | if (ret) | |
1422 | return ret; | |
a6360785 NB |
1423 | /* |
1424 | * Signal bidirectional data payloads to target-core | |
1425 | */ | |
1426 | if (flags & TARGET_SCF_BIDI_OP) | |
1427 | se_cmd->se_cmd_flags |= SCF_BIDI; | |
1428 | /* | |
1429 | * Locate se_lun pointer and attach it to struct se_cmd | |
1430 | */ | |
de103c93 CH |
1431 | rc = transport_lookup_cmd_lun(se_cmd, unpacked_lun); |
1432 | if (rc) { | |
1433 | transport_send_check_condition_and_sense(se_cmd, rc, 0); | |
735703ca | 1434 | target_put_sess_cmd(se_sess, se_cmd); |
d6dfc868 | 1435 | return 0; |
735703ca | 1436 | } |
b5b8e298 SG |
1437 | |
1438 | rc = target_setup_cmd_from_cdb(se_cmd, cdb); | |
1439 | if (rc != 0) { | |
1440 | transport_generic_request_failure(se_cmd, rc); | |
1441 | return 0; | |
1442 | } | |
1443 | ||
def2b339 NB |
1444 | /* |
1445 | * Save pointers for SGLs containing protection information, | |
1446 | * if present. | |
1447 | */ | |
1448 | if (sgl_prot_count) { | |
1449 | se_cmd->t_prot_sg = sgl_prot; | |
1450 | se_cmd->t_prot_nents = sgl_prot_count; | |
1451 | } | |
d6e0175c | 1452 | |
a026757f NB |
1453 | /* |
1454 | * When a non zero sgl_count has been passed perform SGL passthrough | |
1455 | * mapping for pre-allocated fabric memory instead of having target | |
1456 | * core perform an internal SGL allocation.. | |
1457 | */ | |
1458 | if (sgl_count != 0) { | |
1459 | BUG_ON(!sgl); | |
1460 | ||
944981c7 NB |
1461 | /* |
1462 | * A work-around for tcm_loop as some userspace code via | |
1463 | * scsi-generic do not memset their associated read buffers, | |
1464 | * so go ahead and do that here for type non-data CDBs. Also | |
1465 | * note that this is currently guaranteed to be a single SGL | |
1466 | * for this case by target core in target_setup_cmd_from_cdb() | |
1467 | * -> transport_generic_cmd_sequencer(). | |
1468 | */ | |
1469 | if (!(se_cmd->se_cmd_flags & SCF_SCSI_DATA_CDB) && | |
1470 | se_cmd->data_direction == DMA_FROM_DEVICE) { | |
1471 | unsigned char *buf = NULL; | |
1472 | ||
1473 | if (sgl) | |
1474 | buf = kmap(sg_page(sgl)) + sgl->offset; | |
1475 | ||
1476 | if (buf) { | |
1477 | memset(buf, 0, sgl->length); | |
1478 | kunmap(sg_page(sgl)); | |
1479 | } | |
1480 | } | |
1481 | ||
a026757f NB |
1482 | rc = transport_generic_map_mem_to_cmd(se_cmd, sgl, sgl_count, |
1483 | sgl_bidi, sgl_bidi_count); | |
1484 | if (rc != 0) { | |
de103c93 | 1485 | transport_generic_request_failure(se_cmd, rc); |
a026757f NB |
1486 | return 0; |
1487 | } | |
1488 | } | |
def2b339 | 1489 | |
11e319ed AG |
1490 | /* |
1491 | * Check if we need to delay processing because of ALUA | |
1492 | * Active/NonOptimized primary access state.. | |
1493 | */ | |
1494 | core_alua_check_nonop_delay(se_cmd); | |
1495 | ||
a6360785 | 1496 | transport_handle_cdb_direct(se_cmd); |
d6dfc868 | 1497 | return 0; |
a6360785 | 1498 | } |
a026757f NB |
1499 | EXPORT_SYMBOL(target_submit_cmd_map_sgls); |
1500 | ||
1501 | /* | |
1502 | * target_submit_cmd - lookup unpacked lun and submit uninitialized se_cmd | |
1503 | * | |
1504 | * @se_cmd: command descriptor to submit | |
1505 | * @se_sess: associated se_sess for endpoint | |
1506 | * @cdb: pointer to SCSI CDB | |
1507 | * @sense: pointer to SCSI sense buffer | |
1508 | * @unpacked_lun: unpacked LUN to reference for struct se_lun | |
1509 | * @data_length: fabric expected data transfer length | |
1510 | * @task_addr: SAM task attribute | |
1511 | * @data_dir: DMA data direction | |
1512 | * @flags: flags for command submission from target_sc_flags_tables | |
1513 | * | |
1514 | * Returns non zero to signal active I/O shutdown failure. All other | |
1515 | * setup exceptions will be returned as a SCSI CHECK_CONDITION response, | |
1516 | * but still return zero here. | |
1517 | * | |
1518 | * This may only be called from process context, and also currently | |
1519 | * assumes internal allocation of fabric payload buffer by target-core. | |
1520 | * | |
1521 | * It also assumes interal target core SGL memory allocation. | |
1522 | */ | |
1523 | int target_submit_cmd(struct se_cmd *se_cmd, struct se_session *se_sess, | |
1524 | unsigned char *cdb, unsigned char *sense, u32 unpacked_lun, | |
1525 | u32 data_length, int task_attr, int data_dir, int flags) | |
1526 | { | |
1527 | return target_submit_cmd_map_sgls(se_cmd, se_sess, cdb, sense, | |
1528 | unpacked_lun, data_length, task_attr, data_dir, | |
def2b339 | 1529 | flags, NULL, 0, NULL, 0, NULL, 0); |
a026757f | 1530 | } |
a6360785 NB |
1531 | EXPORT_SYMBOL(target_submit_cmd); |
1532 | ||
9f0d05c2 NB |
1533 | static void target_complete_tmr_failure(struct work_struct *work) |
1534 | { | |
1535 | struct se_cmd *se_cmd = container_of(work, struct se_cmd, work); | |
1536 | ||
1537 | se_cmd->se_tmr_req->response = TMR_LUN_DOES_NOT_EXIST; | |
1538 | se_cmd->se_tfo->queue_tm_rsp(se_cmd); | |
5a3b6fc0 RD |
1539 | |
1540 | transport_cmd_check_stop_to_fabric(se_cmd); | |
9f0d05c2 NB |
1541 | } |
1542 | ||
ea98d7f9 AG |
1543 | /** |
1544 | * target_submit_tmr - lookup unpacked lun and submit uninitialized se_cmd | |
1545 | * for TMR CDBs | |
1546 | * | |
1547 | * @se_cmd: command descriptor to submit | |
1548 | * @se_sess: associated se_sess for endpoint | |
1549 | * @sense: pointer to SCSI sense buffer | |
1550 | * @unpacked_lun: unpacked LUN to reference for struct se_lun | |
1551 | * @fabric_context: fabric context for TMR req | |
1552 | * @tm_type: Type of TM request | |
c0974f89 NB |
1553 | * @gfp: gfp type for caller |
1554 | * @tag: referenced task tag for TMR_ABORT_TASK | |
c7042cae | 1555 | * @flags: submit cmd flags |
ea98d7f9 AG |
1556 | * |
1557 | * Callable from all contexts. | |
1558 | **/ | |
1559 | ||
c7042cae | 1560 | int target_submit_tmr(struct se_cmd *se_cmd, struct se_session *se_sess, |
ea98d7f9 | 1561 | unsigned char *sense, u32 unpacked_lun, |
c0974f89 NB |
1562 | void *fabric_tmr_ptr, unsigned char tm_type, |
1563 | gfp_t gfp, unsigned int tag, int flags) | |
ea98d7f9 AG |
1564 | { |
1565 | struct se_portal_group *se_tpg; | |
1566 | int ret; | |
1567 | ||
1568 | se_tpg = se_sess->se_tpg; | |
1569 | BUG_ON(!se_tpg); | |
1570 | ||
1571 | transport_init_se_cmd(se_cmd, se_tpg->se_tpg_tfo, se_sess, | |
68d81f40 | 1572 | 0, DMA_NONE, TCM_SIMPLE_TAG, sense); |
c7042cae NB |
1573 | /* |
1574 | * FIXME: Currently expect caller to handle se_cmd->se_tmr_req | |
1575 | * allocation failure. | |
1576 | */ | |
c0974f89 | 1577 | ret = core_tmr_alloc_req(se_cmd, fabric_tmr_ptr, tm_type, gfp); |
c7042cae NB |
1578 | if (ret < 0) |
1579 | return -ENOMEM; | |
ea98d7f9 | 1580 | |
c0974f89 NB |
1581 | if (tm_type == TMR_ABORT_TASK) |
1582 | se_cmd->se_tmr_req->ref_task_tag = tag; | |
1583 | ||
ea98d7f9 | 1584 | /* See target_submit_cmd for commentary */ |
bc187ea6 RD |
1585 | ret = target_get_sess_cmd(se_sess, se_cmd, (flags & TARGET_SCF_ACK_KREF)); |
1586 | if (ret) { | |
1587 | core_tmr_release_req(se_cmd->se_tmr_req); | |
1588 | return ret; | |
1589 | } | |
ea98d7f9 | 1590 | |
ea98d7f9 AG |
1591 | ret = transport_lookup_tmr_lun(se_cmd, unpacked_lun); |
1592 | if (ret) { | |
9f0d05c2 NB |
1593 | /* |
1594 | * For callback during failure handling, push this work off | |
1595 | * to process context with TMR_LUN_DOES_NOT_EXIST status. | |
1596 | */ | |
1597 | INIT_WORK(&se_cmd->work, target_complete_tmr_failure); | |
1598 | schedule_work(&se_cmd->work); | |
c7042cae | 1599 | return 0; |
ea98d7f9 AG |
1600 | } |
1601 | transport_generic_handle_tmr(se_cmd); | |
c7042cae | 1602 | return 0; |
ea98d7f9 AG |
1603 | } |
1604 | EXPORT_SYMBOL(target_submit_tmr); | |
1605 | ||
cdbb70bb | 1606 | /* |
cf572a96 | 1607 | * If the cmd is active, request it to be stopped and sleep until it |
cdbb70bb CH |
1608 | * has completed. |
1609 | */ | |
cf572a96 | 1610 | bool target_stop_cmd(struct se_cmd *cmd, unsigned long *flags) |
cb0df4d3 BVA |
1611 | __releases(&cmd->t_state_lock) |
1612 | __acquires(&cmd->t_state_lock) | |
cdbb70bb | 1613 | { |
cdbb70bb CH |
1614 | bool was_active = false; |
1615 | ||
cf572a96 CH |
1616 | if (cmd->transport_state & CMD_T_BUSY) { |
1617 | cmd->transport_state |= CMD_T_REQUEST_STOP; | |
cdbb70bb CH |
1618 | spin_unlock_irqrestore(&cmd->t_state_lock, *flags); |
1619 | ||
cf572a96 CH |
1620 | pr_debug("cmd %p waiting to complete\n", cmd); |
1621 | wait_for_completion(&cmd->task_stop_comp); | |
1622 | pr_debug("cmd %p stopped successfully\n", cmd); | |
cdbb70bb CH |
1623 | |
1624 | spin_lock_irqsave(&cmd->t_state_lock, *flags); | |
cf572a96 CH |
1625 | cmd->transport_state &= ~CMD_T_REQUEST_STOP; |
1626 | cmd->transport_state &= ~CMD_T_BUSY; | |
cdbb70bb CH |
1627 | was_active = true; |
1628 | } | |
1629 | ||
cdbb70bb CH |
1630 | return was_active; |
1631 | } | |
1632 | ||
c66ac9db NB |
1633 | /* |
1634 | * Handle SAM-esque emulation for generic transport request failures. | |
1635 | */ | |
de103c93 CH |
1636 | void transport_generic_request_failure(struct se_cmd *cmd, |
1637 | sense_reason_t sense_reason) | |
c66ac9db | 1638 | { |
07bde79a NB |
1639 | int ret = 0; |
1640 | ||
6708bb27 | 1641 | pr_debug("-----[ Storage Engine Exception for cmd: %p ITT: 0x%08x" |
e3d6f909 | 1642 | " CDB: 0x%02x\n", cmd, cmd->se_tfo->get_task_tag(cmd), |
a1d8b49a | 1643 | cmd->t_task_cdb[0]); |
de103c93 | 1644 | pr_debug("-----[ i_state: %d t_state: %d sense_reason: %d\n", |
e3d6f909 | 1645 | cmd->se_tfo->get_cmd_state(cmd), |
de103c93 | 1646 | cmd->t_state, sense_reason); |
d43d6aea | 1647 | pr_debug("-----[ CMD_T_ACTIVE: %d CMD_T_STOP: %d CMD_T_SENT: %d\n", |
7d680f3b CH |
1648 | (cmd->transport_state & CMD_T_ACTIVE) != 0, |
1649 | (cmd->transport_state & CMD_T_STOP) != 0, | |
1650 | (cmd->transport_state & CMD_T_SENT) != 0); | |
c66ac9db | 1651 | |
c66ac9db NB |
1652 | /* |
1653 | * For SAM Task Attribute emulation for failed struct se_cmd | |
1654 | */ | |
019c4ca6 | 1655 | transport_complete_task_attr(cmd); |
cf6d1f09 NB |
1656 | /* |
1657 | * Handle special case for COMPARE_AND_WRITE failure, where the | |
c8e63985 | 1658 | * callback is expected to drop the per device ->caw_sem. |
cf6d1f09 NB |
1659 | */ |
1660 | if ((cmd->se_cmd_flags & SCF_COMPARE_AND_WRITE) && | |
1661 | cmd->transport_complete_callback) | |
c8e63985 | 1662 | cmd->transport_complete_callback(cmd, false); |
c66ac9db | 1663 | |
de103c93 | 1664 | switch (sense_reason) { |
03e98c9e NB |
1665 | case TCM_NON_EXISTENT_LUN: |
1666 | case TCM_UNSUPPORTED_SCSI_OPCODE: | |
1667 | case TCM_INVALID_CDB_FIELD: | |
1668 | case TCM_INVALID_PARAMETER_LIST: | |
bb992e72 | 1669 | case TCM_PARAMETER_LIST_LENGTH_ERROR: |
03e98c9e NB |
1670 | case TCM_LOGICAL_UNIT_COMMUNICATION_FAILURE: |
1671 | case TCM_UNKNOWN_MODE_PAGE: | |
1672 | case TCM_WRITE_PROTECTED: | |
e2397c70 | 1673 | case TCM_ADDRESS_OUT_OF_RANGE: |
03e98c9e NB |
1674 | case TCM_CHECK_CONDITION_ABORT_CMD: |
1675 | case TCM_CHECK_CONDITION_UNIT_ATTENTION: | |
1676 | case TCM_CHECK_CONDITION_NOT_READY: | |
94387aa7 NB |
1677 | case TCM_LOGICAL_BLOCK_GUARD_CHECK_FAILED: |
1678 | case TCM_LOGICAL_BLOCK_APP_TAG_CHECK_FAILED: | |
1679 | case TCM_LOGICAL_BLOCK_REF_TAG_CHECK_FAILED: | |
c66ac9db | 1680 | break; |
de103c93 CH |
1681 | case TCM_OUT_OF_RESOURCES: |
1682 | sense_reason = TCM_LOGICAL_UNIT_COMMUNICATION_FAILURE; | |
1683 | break; | |
03e98c9e | 1684 | case TCM_RESERVATION_CONFLICT: |
c66ac9db NB |
1685 | /* |
1686 | * No SENSE Data payload for this case, set SCSI Status | |
1687 | * and queue the response to $FABRIC_MOD. | |
1688 | * | |
1689 | * Uses linux/include/scsi/scsi.h SAM status codes defs | |
1690 | */ | |
1691 | cmd->scsi_status = SAM_STAT_RESERVATION_CONFLICT; | |
1692 | /* | |
1693 | * For UA Interlock Code 11b, a RESERVATION CONFLICT will | |
1694 | * establish a UNIT ATTENTION with PREVIOUS RESERVATION | |
1695 | * CONFLICT STATUS. | |
1696 | * | |
1697 | * See spc4r17, section 7.4.6 Control Mode Page, Table 349 | |
1698 | */ | |
e3d6f909 | 1699 | if (cmd->se_sess && |
0fd97ccf | 1700 | cmd->se_dev->dev_attrib.emulate_ua_intlck_ctrl == 2) |
e3d6f909 | 1701 | core_scsi3_ua_allocate(cmd->se_sess->se_node_acl, |
c66ac9db NB |
1702 | cmd->orig_fe_lun, 0x2C, |
1703 | ASCQ_2CH_PREVIOUS_RESERVATION_CONFLICT_STATUS); | |
1704 | ||
e5c0d6ad RD |
1705 | trace_target_cmd_complete(cmd); |
1706 | ret = cmd->se_tfo-> queue_status(cmd); | |
f147abb4 | 1707 | if (ret == -EAGAIN || ret == -ENOMEM) |
07bde79a | 1708 | goto queue_full; |
c66ac9db | 1709 | goto check_stop; |
c66ac9db | 1710 | default: |
6708bb27 | 1711 | pr_err("Unknown transport error for CDB 0x%02x: %d\n", |
de103c93 CH |
1712 | cmd->t_task_cdb[0], sense_reason); |
1713 | sense_reason = TCM_UNSUPPORTED_SCSI_OPCODE; | |
c66ac9db NB |
1714 | break; |
1715 | } | |
f3146437 | 1716 | |
de103c93 | 1717 | ret = transport_send_check_condition_and_sense(cmd, sense_reason, 0); |
03e98c9e NB |
1718 | if (ret == -EAGAIN || ret == -ENOMEM) |
1719 | goto queue_full; | |
07bde79a | 1720 | |
c66ac9db NB |
1721 | check_stop: |
1722 | transport_lun_remove_cmd(cmd); | |
6708bb27 | 1723 | if (!transport_cmd_check_stop_to_fabric(cmd)) |
c66ac9db | 1724 | ; |
07bde79a NB |
1725 | return; |
1726 | ||
1727 | queue_full: | |
e057f533 CH |
1728 | cmd->t_state = TRANSPORT_COMPLETE_QF_OK; |
1729 | transport_handle_queue_full(cmd, cmd->se_dev); | |
c66ac9db | 1730 | } |
2fbff127 | 1731 | EXPORT_SYMBOL(transport_generic_request_failure); |
c66ac9db | 1732 | |
76dde50e | 1733 | void __target_execute_cmd(struct se_cmd *cmd) |
c66ac9db | 1734 | { |
de103c93 | 1735 | sense_reason_t ret; |
5f41a31d | 1736 | |
de103c93 CH |
1737 | if (cmd->execute_cmd) { |
1738 | ret = cmd->execute_cmd(cmd); | |
1739 | if (ret) { | |
1740 | spin_lock_irq(&cmd->t_state_lock); | |
1741 | cmd->transport_state &= ~(CMD_T_BUSY|CMD_T_SENT); | |
1742 | spin_unlock_irq(&cmd->t_state_lock); | |
5f41a31d | 1743 | |
de103c93 CH |
1744 | transport_generic_request_failure(cmd, ret); |
1745 | } | |
5f41a31d CH |
1746 | } |
1747 | } | |
1748 | ||
aa58b531 NB |
1749 | static int target_write_prot_action(struct se_cmd *cmd) |
1750 | { | |
5132d1e6 | 1751 | u32 sectors; |
aa58b531 NB |
1752 | /* |
1753 | * Perform WRITE_INSERT of PI using software emulation when backend | |
1754 | * device has PI enabled, if the transport has not already generated | |
1755 | * PI using hardware WRITE_INSERT offload. | |
1756 | */ | |
1757 | switch (cmd->prot_op) { | |
1758 | case TARGET_PROT_DOUT_INSERT: | |
1759 | if (!(cmd->se_sess->sup_prot_ops & TARGET_PROT_DOUT_INSERT)) | |
1760 | sbc_dif_generate(cmd); | |
1761 | break; | |
5132d1e6 NB |
1762 | case TARGET_PROT_DOUT_STRIP: |
1763 | if (cmd->se_sess->sup_prot_ops & TARGET_PROT_DOUT_STRIP) | |
1764 | break; | |
1765 | ||
1766 | sectors = cmd->data_length >> ilog2(cmd->se_dev->dev_attrib.block_size); | |
f75b6fae SG |
1767 | cmd->pi_err = sbc_dif_verify(cmd, cmd->t_task_lba, |
1768 | sectors, 0, cmd->t_prot_sg, 0); | |
5132d1e6 NB |
1769 | if (unlikely(cmd->pi_err)) { |
1770 | spin_lock_irq(&cmd->t_state_lock); | |
6c2faeaa | 1771 | cmd->transport_state &= ~(CMD_T_BUSY|CMD_T_SENT); |
5132d1e6 NB |
1772 | spin_unlock_irq(&cmd->t_state_lock); |
1773 | transport_generic_request_failure(cmd, cmd->pi_err); | |
1774 | return -1; | |
1775 | } | |
1776 | break; | |
aa58b531 NB |
1777 | default: |
1778 | break; | |
1779 | } | |
1780 | ||
1781 | return 0; | |
1782 | } | |
1783 | ||
019c4ca6 | 1784 | static bool target_handle_task_attr(struct se_cmd *cmd) |
5f41a31d CH |
1785 | { |
1786 | struct se_device *dev = cmd->se_dev; | |
1787 | ||
a3541703 | 1788 | if (dev->transport->transport_flags & TRANSPORT_FLAG_PASSTHROUGH) |
019c4ca6 | 1789 | return false; |
5f41a31d | 1790 | |
c66ac9db | 1791 | /* |
25985edc | 1792 | * Check for the existence of HEAD_OF_QUEUE, and if true return 1 |
c66ac9db NB |
1793 | * to allow the passed struct se_cmd list of tasks to the front of the list. |
1794 | */ | |
5f41a31d | 1795 | switch (cmd->sam_task_attr) { |
68d81f40 | 1796 | case TCM_HEAD_TAG: |
5f41a31d CH |
1797 | pr_debug("Added HEAD_OF_QUEUE for CDB: 0x%02x, " |
1798 | "se_ordered_id: %u\n", | |
1799 | cmd->t_task_cdb[0], cmd->se_ordered_id); | |
019c4ca6 | 1800 | return false; |
68d81f40 | 1801 | case TCM_ORDERED_TAG: |
33940d09 | 1802 | atomic_inc_mb(&dev->dev_ordered_sync); |
c66ac9db | 1803 | |
5f41a31d CH |
1804 | pr_debug("Added ORDERED for CDB: 0x%02x to ordered list, " |
1805 | " se_ordered_id: %u\n", | |
1806 | cmd->t_task_cdb[0], cmd->se_ordered_id); | |
1807 | ||
c66ac9db | 1808 | /* |
5f41a31d CH |
1809 | * Execute an ORDERED command if no other older commands |
1810 | * exist that need to be completed first. | |
c66ac9db | 1811 | */ |
5f41a31d | 1812 | if (!atomic_read(&dev->simple_cmds)) |
019c4ca6 | 1813 | return false; |
5f41a31d CH |
1814 | break; |
1815 | default: | |
c66ac9db NB |
1816 | /* |
1817 | * For SIMPLE and UNTAGGED Task Attribute commands | |
1818 | */ | |
33940d09 | 1819 | atomic_inc_mb(&dev->simple_cmds); |
5f41a31d | 1820 | break; |
c66ac9db | 1821 | } |
5f41a31d | 1822 | |
019c4ca6 CH |
1823 | if (atomic_read(&dev->dev_ordered_sync) == 0) |
1824 | return false; | |
c66ac9db | 1825 | |
019c4ca6 CH |
1826 | spin_lock(&dev->delayed_cmd_lock); |
1827 | list_add_tail(&cmd->se_delayed_node, &dev->delayed_cmd_list); | |
1828 | spin_unlock(&dev->delayed_cmd_lock); | |
1829 | ||
1830 | pr_debug("Added CDB: 0x%02x Task Attr: 0x%02x to" | |
1831 | " delayed CMD list, se_ordered_id: %u\n", | |
1832 | cmd->t_task_cdb[0], cmd->sam_task_attr, | |
1833 | cmd->se_ordered_id); | |
1834 | return true; | |
1835 | } | |
1836 | ||
1837 | void target_execute_cmd(struct se_cmd *cmd) | |
1838 | { | |
1839 | /* | |
1840 | * If the received CDB has aleady been aborted stop processing it here. | |
1841 | */ | |
4a9a6c8d | 1842 | if (transport_check_aborted_status(cmd, 1)) |
5f41a31d | 1843 | return; |
c66ac9db | 1844 | |
019c4ca6 CH |
1845 | /* |
1846 | * Determine if frontend context caller is requesting the stopping of | |
1847 | * this command for frontend exceptions. | |
1848 | */ | |
4a9a6c8d | 1849 | spin_lock_irq(&cmd->t_state_lock); |
019c4ca6 CH |
1850 | if (cmd->transport_state & CMD_T_STOP) { |
1851 | pr_debug("%s:%d CMD_T_STOP for ITT: 0x%08x\n", | |
1852 | __func__, __LINE__, | |
1853 | cmd->se_tfo->get_task_tag(cmd)); | |
1854 | ||
1855 | spin_unlock_irq(&cmd->t_state_lock); | |
a95d6511 | 1856 | complete_all(&cmd->t_transport_stop_comp); |
019c4ca6 CH |
1857 | return; |
1858 | } | |
1859 | ||
1860 | cmd->t_state = TRANSPORT_PROCESSING; | |
1a398b97 | 1861 | cmd->transport_state |= CMD_T_ACTIVE|CMD_T_BUSY|CMD_T_SENT; |
019c4ca6 | 1862 | spin_unlock_irq(&cmd->t_state_lock); |
aa58b531 NB |
1863 | |
1864 | if (target_write_prot_action(cmd)) | |
1865 | return; | |
019c4ca6 | 1866 | |
1a398b97 NB |
1867 | if (target_handle_task_attr(cmd)) { |
1868 | spin_lock_irq(&cmd->t_state_lock); | |
6c2faeaa | 1869 | cmd->transport_state &= ~(CMD_T_BUSY | CMD_T_SENT); |
1a398b97 NB |
1870 | spin_unlock_irq(&cmd->t_state_lock); |
1871 | return; | |
1872 | } | |
1873 | ||
1874 | __target_execute_cmd(cmd); | |
c66ac9db | 1875 | } |
70baf0ab | 1876 | EXPORT_SYMBOL(target_execute_cmd); |
c66ac9db | 1877 | |
5f41a31d CH |
1878 | /* |
1879 | * Process all commands up to the last received ORDERED task attribute which | |
1880 | * requires another blocking boundary | |
1881 | */ | |
1882 | static void target_restart_delayed_cmds(struct se_device *dev) | |
1883 | { | |
1884 | for (;;) { | |
1885 | struct se_cmd *cmd; | |
1886 | ||
1887 | spin_lock(&dev->delayed_cmd_lock); | |
1888 | if (list_empty(&dev->delayed_cmd_list)) { | |
1889 | spin_unlock(&dev->delayed_cmd_lock); | |
1890 | break; | |
1891 | } | |
1892 | ||
1893 | cmd = list_entry(dev->delayed_cmd_list.next, | |
1894 | struct se_cmd, se_delayed_node); | |
1895 | list_del(&cmd->se_delayed_node); | |
1896 | spin_unlock(&dev->delayed_cmd_lock); | |
1897 | ||
1898 | __target_execute_cmd(cmd); | |
1899 | ||
68d81f40 | 1900 | if (cmd->sam_task_attr == TCM_ORDERED_TAG) |
5f41a31d CH |
1901 | break; |
1902 | } | |
1903 | } | |
1904 | ||
c66ac9db | 1905 | /* |
35e0e757 | 1906 | * Called from I/O completion to determine which dormant/delayed |
c66ac9db NB |
1907 | * and ordered cmds need to have their tasks added to the execution queue. |
1908 | */ | |
1909 | static void transport_complete_task_attr(struct se_cmd *cmd) | |
1910 | { | |
5951146d | 1911 | struct se_device *dev = cmd->se_dev; |
c66ac9db | 1912 | |
a3541703 | 1913 | if (dev->transport->transport_flags & TRANSPORT_FLAG_PASSTHROUGH) |
019c4ca6 CH |
1914 | return; |
1915 | ||
68d81f40 | 1916 | if (cmd->sam_task_attr == TCM_SIMPLE_TAG) { |
33940d09 | 1917 | atomic_dec_mb(&dev->simple_cmds); |
c66ac9db | 1918 | dev->dev_cur_ordered_id++; |
6708bb27 | 1919 | pr_debug("Incremented dev->dev_cur_ordered_id: %u for" |
c66ac9db NB |
1920 | " SIMPLE: %u\n", dev->dev_cur_ordered_id, |
1921 | cmd->se_ordered_id); | |
68d81f40 | 1922 | } else if (cmd->sam_task_attr == TCM_HEAD_TAG) { |
c66ac9db | 1923 | dev->dev_cur_ordered_id++; |
6708bb27 | 1924 | pr_debug("Incremented dev_cur_ordered_id: %u for" |
c66ac9db NB |
1925 | " HEAD_OF_QUEUE: %u\n", dev->dev_cur_ordered_id, |
1926 | cmd->se_ordered_id); | |
68d81f40 | 1927 | } else if (cmd->sam_task_attr == TCM_ORDERED_TAG) { |
33940d09 | 1928 | atomic_dec_mb(&dev->dev_ordered_sync); |
c66ac9db NB |
1929 | |
1930 | dev->dev_cur_ordered_id++; | |
6708bb27 | 1931 | pr_debug("Incremented dev_cur_ordered_id: %u for ORDERED:" |
c66ac9db NB |
1932 | " %u\n", dev->dev_cur_ordered_id, cmd->se_ordered_id); |
1933 | } | |
c66ac9db | 1934 | |
5f41a31d | 1935 | target_restart_delayed_cmds(dev); |
c66ac9db NB |
1936 | } |
1937 | ||
e057f533 | 1938 | static void transport_complete_qf(struct se_cmd *cmd) |
07bde79a NB |
1939 | { |
1940 | int ret = 0; | |
1941 | ||
019c4ca6 | 1942 | transport_complete_task_attr(cmd); |
e057f533 CH |
1943 | |
1944 | if (cmd->se_cmd_flags & SCF_TRANSPORT_TASK_SENSE) { | |
e5c0d6ad | 1945 | trace_target_cmd_complete(cmd); |
e057f533 | 1946 | ret = cmd->se_tfo->queue_status(cmd); |
082f58ac | 1947 | goto out; |
e057f533 | 1948 | } |
07bde79a NB |
1949 | |
1950 | switch (cmd->data_direction) { | |
1951 | case DMA_FROM_DEVICE: | |
e5c0d6ad | 1952 | trace_target_cmd_complete(cmd); |
07bde79a NB |
1953 | ret = cmd->se_tfo->queue_data_in(cmd); |
1954 | break; | |
1955 | case DMA_TO_DEVICE: | |
64577407 | 1956 | if (cmd->se_cmd_flags & SCF_BIDI) { |
07bde79a | 1957 | ret = cmd->se_tfo->queue_data_in(cmd); |
63509c60 | 1958 | break; |
07bde79a NB |
1959 | } |
1960 | /* Fall through for DMA_TO_DEVICE */ | |
1961 | case DMA_NONE: | |
e5c0d6ad | 1962 | trace_target_cmd_complete(cmd); |
07bde79a NB |
1963 | ret = cmd->se_tfo->queue_status(cmd); |
1964 | break; | |
1965 | default: | |
1966 | break; | |
1967 | } | |
1968 | ||
e057f533 CH |
1969 | out: |
1970 | if (ret < 0) { | |
1971 | transport_handle_queue_full(cmd, cmd->se_dev); | |
1972 | return; | |
1973 | } | |
1974 | transport_lun_remove_cmd(cmd); | |
1975 | transport_cmd_check_stop_to_fabric(cmd); | |
07bde79a NB |
1976 | } |
1977 | ||
1978 | static void transport_handle_queue_full( | |
1979 | struct se_cmd *cmd, | |
e057f533 | 1980 | struct se_device *dev) |
07bde79a NB |
1981 | { |
1982 | spin_lock_irq(&dev->qf_cmd_lock); | |
07bde79a | 1983 | list_add_tail(&cmd->se_qf_node, &cmd->se_dev->qf_cmd_list); |
33940d09 | 1984 | atomic_inc_mb(&dev->dev_qf_count); |
07bde79a NB |
1985 | spin_unlock_irq(&cmd->se_dev->qf_cmd_lock); |
1986 | ||
1987 | schedule_work(&cmd->se_dev->qf_work_queue); | |
1988 | } | |
1989 | ||
fdeab852 | 1990 | static bool target_read_prot_action(struct se_cmd *cmd) |
bc005869 | 1991 | { |
fdeab852 NB |
1992 | switch (cmd->prot_op) { |
1993 | case TARGET_PROT_DIN_STRIP: | |
1994 | if (!(cmd->se_sess->sup_prot_ops & TARGET_PROT_DIN_STRIP)) { | |
f75b6fae SG |
1995 | u32 sectors = cmd->data_length >> |
1996 | ilog2(cmd->se_dev->dev_attrib.block_size); | |
1997 | ||
1998 | cmd->pi_err = sbc_dif_verify(cmd, cmd->t_task_lba, | |
1999 | sectors, 0, cmd->t_prot_sg, | |
2000 | 0); | |
2001 | if (cmd->pi_err) | |
fdeab852 | 2002 | return true; |
bc005869 | 2003 | } |
fdeab852 | 2004 | break; |
72c03850 NB |
2005 | case TARGET_PROT_DIN_INSERT: |
2006 | if (cmd->se_sess->sup_prot_ops & TARGET_PROT_DIN_INSERT) | |
2007 | break; | |
2008 | ||
2009 | sbc_dif_generate(cmd); | |
2010 | break; | |
fdeab852 NB |
2011 | default: |
2012 | break; | |
bc005869 NB |
2013 | } |
2014 | ||
2015 | return false; | |
2016 | } | |
2017 | ||
35e0e757 | 2018 | static void target_complete_ok_work(struct work_struct *work) |
c66ac9db | 2019 | { |
35e0e757 | 2020 | struct se_cmd *cmd = container_of(work, struct se_cmd, work); |
27a27099 | 2021 | int ret; |
35e0e757 | 2022 | |
c66ac9db NB |
2023 | /* |
2024 | * Check if we need to move delayed/dormant tasks from cmds on the | |
2025 | * delayed execution list after a HEAD_OF_QUEUE or ORDERED Task | |
2026 | * Attribute. | |
2027 | */ | |
019c4ca6 CH |
2028 | transport_complete_task_attr(cmd); |
2029 | ||
07bde79a NB |
2030 | /* |
2031 | * Check to schedule QUEUE_FULL work, or execute an existing | |
2032 | * cmd->transport_qf_callback() | |
2033 | */ | |
2034 | if (atomic_read(&cmd->se_dev->dev_qf_count) != 0) | |
2035 | schedule_work(&cmd->se_dev->qf_work_queue); | |
2036 | ||
c66ac9db | 2037 | /* |
d5829eac | 2038 | * Check if we need to send a sense buffer from |
c66ac9db NB |
2039 | * the struct se_cmd in question. |
2040 | */ | |
2041 | if (cmd->se_cmd_flags & SCF_TRANSPORT_TASK_SENSE) { | |
27a27099 | 2042 | WARN_ON(!cmd->scsi_status); |
27a27099 PB |
2043 | ret = transport_send_check_condition_and_sense( |
2044 | cmd, 0, 1); | |
2045 | if (ret == -EAGAIN || ret == -ENOMEM) | |
2046 | goto queue_full; | |
2047 | ||
2048 | transport_lun_remove_cmd(cmd); | |
2049 | transport_cmd_check_stop_to_fabric(cmd); | |
2050 | return; | |
c66ac9db NB |
2051 | } |
2052 | /* | |
25985edc | 2053 | * Check for a callback, used by amongst other things |
a6b0133c | 2054 | * XDWRITE_READ_10 and COMPARE_AND_WRITE emulation. |
c66ac9db | 2055 | */ |
a6b0133c NB |
2056 | if (cmd->transport_complete_callback) { |
2057 | sense_reason_t rc; | |
2058 | ||
c8e63985 | 2059 | rc = cmd->transport_complete_callback(cmd, true); |
a2890087 | 2060 | if (!rc && !(cmd->se_cmd_flags & SCF_COMPARE_AND_WRITE_POST)) { |
c8e63985 NB |
2061 | if ((cmd->se_cmd_flags & SCF_COMPARE_AND_WRITE) && |
2062 | !cmd->data_length) | |
2063 | goto queue_rsp; | |
2064 | ||
a6b0133c | 2065 | return; |
a2890087 NB |
2066 | } else if (rc) { |
2067 | ret = transport_send_check_condition_and_sense(cmd, | |
2068 | rc, 0); | |
2069 | if (ret == -EAGAIN || ret == -ENOMEM) | |
2070 | goto queue_full; | |
a6b0133c | 2071 | |
a2890087 NB |
2072 | transport_lun_remove_cmd(cmd); |
2073 | transport_cmd_check_stop_to_fabric(cmd); | |
2074 | return; | |
2075 | } | |
a6b0133c | 2076 | } |
c66ac9db | 2077 | |
c8e63985 | 2078 | queue_rsp: |
c66ac9db NB |
2079 | switch (cmd->data_direction) { |
2080 | case DMA_FROM_DEVICE: | |
2081 | spin_lock(&cmd->se_lun->lun_sep_lock); | |
e3d6f909 AG |
2082 | if (cmd->se_lun->lun_sep) { |
2083 | cmd->se_lun->lun_sep->sep_stats.tx_data_octets += | |
c66ac9db NB |
2084 | cmd->data_length; |
2085 | } | |
2086 | spin_unlock(&cmd->se_lun->lun_sep_lock); | |
bc005869 NB |
2087 | /* |
2088 | * Perform READ_STRIP of PI using software emulation when | |
2089 | * backend had PI enabled, if the transport will not be | |
2090 | * performing hardware READ_STRIP offload. | |
2091 | */ | |
fdeab852 | 2092 | if (target_read_prot_action(cmd)) { |
bc005869 NB |
2093 | ret = transport_send_check_condition_and_sense(cmd, |
2094 | cmd->pi_err, 0); | |
2095 | if (ret == -EAGAIN || ret == -ENOMEM) | |
2096 | goto queue_full; | |
2097 | ||
2098 | transport_lun_remove_cmd(cmd); | |
2099 | transport_cmd_check_stop_to_fabric(cmd); | |
2100 | return; | |
2101 | } | |
c66ac9db | 2102 | |
e5c0d6ad | 2103 | trace_target_cmd_complete(cmd); |
07bde79a | 2104 | ret = cmd->se_tfo->queue_data_in(cmd); |
f147abb4 | 2105 | if (ret == -EAGAIN || ret == -ENOMEM) |
07bde79a | 2106 | goto queue_full; |
c66ac9db NB |
2107 | break; |
2108 | case DMA_TO_DEVICE: | |
2109 | spin_lock(&cmd->se_lun->lun_sep_lock); | |
e3d6f909 AG |
2110 | if (cmd->se_lun->lun_sep) { |
2111 | cmd->se_lun->lun_sep->sep_stats.rx_data_octets += | |
c66ac9db NB |
2112 | cmd->data_length; |
2113 | } | |
2114 | spin_unlock(&cmd->se_lun->lun_sep_lock); | |
2115 | /* | |
2116 | * Check if we need to send READ payload for BIDI-COMMAND | |
2117 | */ | |
64577407 | 2118 | if (cmd->se_cmd_flags & SCF_BIDI) { |
c66ac9db | 2119 | spin_lock(&cmd->se_lun->lun_sep_lock); |
e3d6f909 AG |
2120 | if (cmd->se_lun->lun_sep) { |
2121 | cmd->se_lun->lun_sep->sep_stats.tx_data_octets += | |
c66ac9db NB |
2122 | cmd->data_length; |
2123 | } | |
2124 | spin_unlock(&cmd->se_lun->lun_sep_lock); | |
07bde79a | 2125 | ret = cmd->se_tfo->queue_data_in(cmd); |
f147abb4 | 2126 | if (ret == -EAGAIN || ret == -ENOMEM) |
07bde79a | 2127 | goto queue_full; |
c66ac9db NB |
2128 | break; |
2129 | } | |
2130 | /* Fall through for DMA_TO_DEVICE */ | |
2131 | case DMA_NONE: | |
e5c0d6ad | 2132 | trace_target_cmd_complete(cmd); |
07bde79a | 2133 | ret = cmd->se_tfo->queue_status(cmd); |
f147abb4 | 2134 | if (ret == -EAGAIN || ret == -ENOMEM) |
07bde79a | 2135 | goto queue_full; |
c66ac9db NB |
2136 | break; |
2137 | default: | |
2138 | break; | |
2139 | } | |
2140 | ||
2141 | transport_lun_remove_cmd(cmd); | |
2142 | transport_cmd_check_stop_to_fabric(cmd); | |
07bde79a NB |
2143 | return; |
2144 | ||
2145 | queue_full: | |
6708bb27 | 2146 | pr_debug("Handling complete_ok QUEUE_FULL: se_cmd: %p," |
07bde79a | 2147 | " data_direction: %d\n", cmd, cmd->data_direction); |
e057f533 CH |
2148 | cmd->t_state = TRANSPORT_COMPLETE_QF_OK; |
2149 | transport_handle_queue_full(cmd, cmd->se_dev); | |
c66ac9db NB |
2150 | } |
2151 | ||
6708bb27 | 2152 | static inline void transport_free_sgl(struct scatterlist *sgl, int nents) |
c66ac9db | 2153 | { |
ec98f782 | 2154 | struct scatterlist *sg; |
ec98f782 | 2155 | int count; |
c66ac9db | 2156 | |
6708bb27 AG |
2157 | for_each_sg(sgl, sg, nents, count) |
2158 | __free_page(sg_page(sg)); | |
c66ac9db | 2159 | |
6708bb27 AG |
2160 | kfree(sgl); |
2161 | } | |
c66ac9db | 2162 | |
47e459e6 NB |
2163 | static inline void transport_reset_sgl_orig(struct se_cmd *cmd) |
2164 | { | |
2165 | /* | |
2166 | * Check for saved t_data_sg that may be used for COMPARE_AND_WRITE | |
2167 | * emulation, and free + reset pointers if necessary.. | |
2168 | */ | |
2169 | if (!cmd->t_data_sg_orig) | |
2170 | return; | |
2171 | ||
2172 | kfree(cmd->t_data_sg); | |
2173 | cmd->t_data_sg = cmd->t_data_sg_orig; | |
2174 | cmd->t_data_sg_orig = NULL; | |
2175 | cmd->t_data_nents = cmd->t_data_nents_orig; | |
2176 | cmd->t_data_nents_orig = 0; | |
2177 | } | |
2178 | ||
6708bb27 AG |
2179 | static inline void transport_free_pages(struct se_cmd *cmd) |
2180 | { | |
47e459e6 | 2181 | if (cmd->se_cmd_flags & SCF_PASSTHROUGH_SG_TO_MEM_NOALLOC) { |
c8e63985 NB |
2182 | /* |
2183 | * Release special case READ buffer payload required for | |
2184 | * SG_TO_MEM_NOALLOC to function with COMPARE_AND_WRITE | |
2185 | */ | |
2186 | if (cmd->se_cmd_flags & SCF_COMPARE_AND_WRITE) { | |
2187 | transport_free_sgl(cmd->t_bidi_data_sg, | |
2188 | cmd->t_bidi_data_nents); | |
2189 | cmd->t_bidi_data_sg = NULL; | |
2190 | cmd->t_bidi_data_nents = 0; | |
2191 | } | |
47e459e6 | 2192 | transport_reset_sgl_orig(cmd); |
6708bb27 | 2193 | return; |
47e459e6 NB |
2194 | } |
2195 | transport_reset_sgl_orig(cmd); | |
6708bb27 AG |
2196 | |
2197 | transport_free_sgl(cmd->t_data_sg, cmd->t_data_nents); | |
ec98f782 AG |
2198 | cmd->t_data_sg = NULL; |
2199 | cmd->t_data_nents = 0; | |
c66ac9db | 2200 | |
6708bb27 | 2201 | transport_free_sgl(cmd->t_bidi_data_sg, cmd->t_bidi_data_nents); |
ec98f782 AG |
2202 | cmd->t_bidi_data_sg = NULL; |
2203 | cmd->t_bidi_data_nents = 0; | |
acb2bde3 SG |
2204 | |
2205 | transport_free_sgl(cmd->t_prot_sg, cmd->t_prot_nents); | |
2206 | cmd->t_prot_sg = NULL; | |
2207 | cmd->t_prot_nents = 0; | |
c66ac9db NB |
2208 | } |
2209 | ||
e26d99ae CH |
2210 | /** |
2211 | * transport_release_cmd - free a command | |
2212 | * @cmd: command to free | |
2213 | * | |
2214 | * This routine unconditionally frees a command, and reference counting | |
2215 | * or list removal must be done in the caller. | |
2216 | */ | |
d5ddad41 | 2217 | static int transport_release_cmd(struct se_cmd *cmd) |
e26d99ae CH |
2218 | { |
2219 | BUG_ON(!cmd->se_tfo); | |
2220 | ||
c8e31f26 | 2221 | if (cmd->se_cmd_flags & SCF_SCSI_TMR_CDB) |
e26d99ae CH |
2222 | core_tmr_release_req(cmd->se_tmr_req); |
2223 | if (cmd->t_task_cdb != cmd->__t_task_cdb) | |
2224 | kfree(cmd->t_task_cdb); | |
2225 | /* | |
7481deb4 NB |
2226 | * If this cmd has been setup with target_get_sess_cmd(), drop |
2227 | * the kref and call ->release_cmd() in kref callback. | |
e26d99ae | 2228 | */ |
ca24976a | 2229 | return target_put_sess_cmd(cmd->se_sess, cmd); |
e26d99ae CH |
2230 | } |
2231 | ||
d3df7825 CH |
2232 | /** |
2233 | * transport_put_cmd - release a reference to a command | |
2234 | * @cmd: command to release | |
2235 | * | |
2236 | * This routine releases our reference to the command and frees it if possible. | |
2237 | */ | |
d5ddad41 | 2238 | static int transport_put_cmd(struct se_cmd *cmd) |
c66ac9db | 2239 | { |
c66ac9db | 2240 | transport_free_pages(cmd); |
d5ddad41 | 2241 | return transport_release_cmd(cmd); |
c66ac9db | 2242 | } |
c66ac9db | 2243 | |
4949314c | 2244 | void *transport_kmap_data_sg(struct se_cmd *cmd) |
05d1c7c0 | 2245 | { |
ec98f782 | 2246 | struct scatterlist *sg = cmd->t_data_sg; |
4949314c AG |
2247 | struct page **pages; |
2248 | int i; | |
05d1c7c0 AG |
2249 | |
2250 | /* | |
ec98f782 AG |
2251 | * We need to take into account a possible offset here for fabrics like |
2252 | * tcm_loop who may be using a contig buffer from the SCSI midlayer for | |
2253 | * control CDBs passed as SGLs via transport_generic_map_mem_to_cmd() | |
05d1c7c0 | 2254 | */ |
4949314c AG |
2255 | if (!cmd->t_data_nents) |
2256 | return NULL; | |
3717ef0c PB |
2257 | |
2258 | BUG_ON(!sg); | |
2259 | if (cmd->t_data_nents == 1) | |
4949314c AG |
2260 | return kmap(sg_page(sg)) + sg->offset; |
2261 | ||
2262 | /* >1 page. use vmap */ | |
2263 | pages = kmalloc(sizeof(*pages) * cmd->t_data_nents, GFP_KERNEL); | |
de103c93 | 2264 | if (!pages) |
4949314c AG |
2265 | return NULL; |
2266 | ||
2267 | /* convert sg[] to pages[] */ | |
2268 | for_each_sg(cmd->t_data_sg, sg, cmd->t_data_nents, i) { | |
2269 | pages[i] = sg_page(sg); | |
2270 | } | |
2271 | ||
2272 | cmd->t_data_vmap = vmap(pages, cmd->t_data_nents, VM_MAP, PAGE_KERNEL); | |
2273 | kfree(pages); | |
de103c93 | 2274 | if (!cmd->t_data_vmap) |
4949314c AG |
2275 | return NULL; |
2276 | ||
2277 | return cmd->t_data_vmap + cmd->t_data_sg[0].offset; | |
05d1c7c0 | 2278 | } |
4949314c | 2279 | EXPORT_SYMBOL(transport_kmap_data_sg); |
05d1c7c0 | 2280 | |
4949314c | 2281 | void transport_kunmap_data_sg(struct se_cmd *cmd) |
05d1c7c0 | 2282 | { |
a1edf9cf | 2283 | if (!cmd->t_data_nents) { |
4949314c | 2284 | return; |
a1edf9cf | 2285 | } else if (cmd->t_data_nents == 1) { |
4949314c | 2286 | kunmap(sg_page(cmd->t_data_sg)); |
a1edf9cf AG |
2287 | return; |
2288 | } | |
4949314c AG |
2289 | |
2290 | vunmap(cmd->t_data_vmap); | |
2291 | cmd->t_data_vmap = NULL; | |
05d1c7c0 | 2292 | } |
4949314c | 2293 | EXPORT_SYMBOL(transport_kunmap_data_sg); |
05d1c7c0 | 2294 | |
c5ff8d6b | 2295 | int |
20093994 NB |
2296 | target_alloc_sgl(struct scatterlist **sgl, unsigned int *nents, u32 length, |
2297 | bool zero_page) | |
c66ac9db | 2298 | { |
20093994 | 2299 | struct scatterlist *sg; |
ec98f782 | 2300 | struct page *page; |
20093994 NB |
2301 | gfp_t zero_flag = (zero_page) ? __GFP_ZERO : 0; |
2302 | unsigned int nent; | |
ec98f782 | 2303 | int i = 0; |
c66ac9db | 2304 | |
20093994 NB |
2305 | nent = DIV_ROUND_UP(length, PAGE_SIZE); |
2306 | sg = kmalloc(sizeof(struct scatterlist) * nent, GFP_KERNEL); | |
2307 | if (!sg) | |
ec98f782 | 2308 | return -ENOMEM; |
c66ac9db | 2309 | |
20093994 | 2310 | sg_init_table(sg, nent); |
9db9da33 | 2311 | |
ec98f782 AG |
2312 | while (length) { |
2313 | u32 page_len = min_t(u32, length, PAGE_SIZE); | |
9db9da33 | 2314 | page = alloc_page(GFP_KERNEL | zero_flag); |
ec98f782 AG |
2315 | if (!page) |
2316 | goto out; | |
c66ac9db | 2317 | |
20093994 | 2318 | sg_set_page(&sg[i], page, page_len, 0); |
ec98f782 AG |
2319 | length -= page_len; |
2320 | i++; | |
c66ac9db | 2321 | } |
20093994 NB |
2322 | *sgl = sg; |
2323 | *nents = nent; | |
c66ac9db | 2324 | return 0; |
c66ac9db | 2325 | |
ec98f782 | 2326 | out: |
d0e27c88 | 2327 | while (i > 0) { |
ec98f782 | 2328 | i--; |
20093994 | 2329 | __free_page(sg_page(&sg[i])); |
c66ac9db | 2330 | } |
20093994 | 2331 | kfree(sg); |
ec98f782 | 2332 | return -ENOMEM; |
c66ac9db NB |
2333 | } |
2334 | ||
da0f7619 | 2335 | /* |
b16a35b0 AG |
2336 | * Allocate any required resources to execute the command. For writes we |
2337 | * might not have the payload yet, so notify the fabric via a call to | |
2338 | * ->write_pending instead. Otherwise place it on the execution queue. | |
c66ac9db | 2339 | */ |
de103c93 CH |
2340 | sense_reason_t |
2341 | transport_generic_new_cmd(struct se_cmd *cmd) | |
c66ac9db | 2342 | { |
c66ac9db | 2343 | int ret = 0; |
c8e63985 | 2344 | bool zero_flag = !(cmd->se_cmd_flags & SCF_SCSI_DATA_CDB); |
c66ac9db NB |
2345 | |
2346 | /* | |
2347 | * Determine is the TCM fabric module has already allocated physical | |
2348 | * memory, and is directly calling transport_generic_map_mem_to_cmd() | |
ec98f782 | 2349 | * beforehand. |
c66ac9db | 2350 | */ |
ec98f782 AG |
2351 | if (!(cmd->se_cmd_flags & SCF_PASSTHROUGH_SG_TO_MEM_NOALLOC) && |
2352 | cmd->data_length) { | |
20093994 | 2353 | |
8cefe07b NB |
2354 | if ((cmd->se_cmd_flags & SCF_BIDI) || |
2355 | (cmd->se_cmd_flags & SCF_COMPARE_AND_WRITE)) { | |
2356 | u32 bidi_length; | |
2357 | ||
2358 | if (cmd->se_cmd_flags & SCF_COMPARE_AND_WRITE) | |
2359 | bidi_length = cmd->t_task_nolb * | |
2360 | cmd->se_dev->dev_attrib.block_size; | |
2361 | else | |
2362 | bidi_length = cmd->data_length; | |
2363 | ||
2364 | ret = target_alloc_sgl(&cmd->t_bidi_data_sg, | |
2365 | &cmd->t_bidi_data_nents, | |
2366 | bidi_length, zero_flag); | |
2367 | if (ret < 0) | |
2368 | return TCM_LOGICAL_UNIT_COMMUNICATION_FAILURE; | |
2369 | } | |
2370 | ||
19f9361a | 2371 | if (cmd->prot_op != TARGET_PROT_NORMAL) { |
acb2bde3 SG |
2372 | ret = target_alloc_sgl(&cmd->t_prot_sg, |
2373 | &cmd->t_prot_nents, | |
2374 | cmd->prot_length, true); | |
2375 | if (ret < 0) | |
2376 | return TCM_LOGICAL_UNIT_COMMUNICATION_FAILURE; | |
2377 | } | |
2378 | ||
20093994 NB |
2379 | ret = target_alloc_sgl(&cmd->t_data_sg, &cmd->t_data_nents, |
2380 | cmd->data_length, zero_flag); | |
c66ac9db | 2381 | if (ret < 0) |
de103c93 | 2382 | return TCM_LOGICAL_UNIT_COMMUNICATION_FAILURE; |
c8e63985 NB |
2383 | } else if ((cmd->se_cmd_flags & SCF_COMPARE_AND_WRITE) && |
2384 | cmd->data_length) { | |
2385 | /* | |
2386 | * Special case for COMPARE_AND_WRITE with fabrics | |
2387 | * using SCF_PASSTHROUGH_SG_TO_MEM_NOALLOC. | |
2388 | */ | |
2389 | u32 caw_length = cmd->t_task_nolb * | |
2390 | cmd->se_dev->dev_attrib.block_size; | |
2391 | ||
2392 | ret = target_alloc_sgl(&cmd->t_bidi_data_sg, | |
2393 | &cmd->t_bidi_data_nents, | |
2394 | caw_length, zero_flag); | |
2395 | if (ret < 0) | |
2396 | return TCM_LOGICAL_UNIT_COMMUNICATION_FAILURE; | |
c66ac9db | 2397 | } |
c66ac9db | 2398 | /* |
c3196f0c CH |
2399 | * If this command is not a write we can execute it right here, |
2400 | * for write buffers we need to notify the fabric driver first | |
2401 | * and let it call back once the write buffers are ready. | |
c66ac9db | 2402 | */ |
5f41a31d | 2403 | target_add_to_state_list(cmd); |
885e7b0e | 2404 | if (cmd->data_direction != DMA_TO_DEVICE || cmd->data_length == 0) { |
c3196f0c CH |
2405 | target_execute_cmd(cmd); |
2406 | return 0; | |
2407 | } | |
862e6389 | 2408 | transport_cmd_check_stop(cmd, false, true); |
c3196f0c CH |
2409 | |
2410 | ret = cmd->se_tfo->write_pending(cmd); | |
2411 | if (ret == -EAGAIN || ret == -ENOMEM) | |
2412 | goto queue_full; | |
2413 | ||
de103c93 CH |
2414 | /* fabric drivers should only return -EAGAIN or -ENOMEM as error */ |
2415 | WARN_ON(ret); | |
2416 | ||
b69c1fcf | 2417 | return (!ret) ? 0 : TCM_LOGICAL_UNIT_COMMUNICATION_FAILURE; |
da0f7619 | 2418 | |
c3196f0c CH |
2419 | queue_full: |
2420 | pr_debug("Handling write_pending QUEUE__FULL: se_cmd: %p\n", cmd); | |
2421 | cmd->t_state = TRANSPORT_COMPLETE_QF_WP; | |
2422 | transport_handle_queue_full(cmd, cmd->se_dev); | |
2423 | return 0; | |
c66ac9db | 2424 | } |
a1d8b49a | 2425 | EXPORT_SYMBOL(transport_generic_new_cmd); |
c66ac9db | 2426 | |
e057f533 | 2427 | static void transport_write_pending_qf(struct se_cmd *cmd) |
07bde79a | 2428 | { |
f147abb4 NB |
2429 | int ret; |
2430 | ||
2431 | ret = cmd->se_tfo->write_pending(cmd); | |
2432 | if (ret == -EAGAIN || ret == -ENOMEM) { | |
e057f533 CH |
2433 | pr_debug("Handling write_pending QUEUE__FULL: se_cmd: %p\n", |
2434 | cmd); | |
2435 | transport_handle_queue_full(cmd, cmd->se_dev); | |
2436 | } | |
07bde79a NB |
2437 | } |
2438 | ||
d5ddad41 | 2439 | int transport_generic_free_cmd(struct se_cmd *cmd, int wait_for_tasks) |
c66ac9db | 2440 | { |
c130480b | 2441 | unsigned long flags; |
d5ddad41 NB |
2442 | int ret = 0; |
2443 | ||
d14921d6 | 2444 | if (!(cmd->se_cmd_flags & SCF_SE_LUN_CMD)) { |
c8e31f26 | 2445 | if (wait_for_tasks && (cmd->se_cmd_flags & SCF_SCSI_TMR_CDB)) |
d14921d6 NB |
2446 | transport_wait_for_tasks(cmd); |
2447 | ||
d5ddad41 | 2448 | ret = transport_release_cmd(cmd); |
d14921d6 NB |
2449 | } else { |
2450 | if (wait_for_tasks) | |
2451 | transport_wait_for_tasks(cmd); | |
c130480b NB |
2452 | /* |
2453 | * Handle WRITE failure case where transport_generic_new_cmd() | |
2454 | * has already added se_cmd to state_list, but fabric has | |
2455 | * failed command before I/O submission. | |
2456 | */ | |
2457 | if (cmd->state_active) { | |
2458 | spin_lock_irqsave(&cmd->t_state_lock, flags); | |
2459 | target_remove_from_state_list(cmd); | |
2460 | spin_unlock_irqrestore(&cmd->t_state_lock, flags); | |
2461 | } | |
d14921d6 | 2462 | |
82f1c8a4 | 2463 | if (cmd->se_lun) |
c66ac9db | 2464 | transport_lun_remove_cmd(cmd); |
c66ac9db | 2465 | |
d5ddad41 | 2466 | ret = transport_put_cmd(cmd); |
c66ac9db | 2467 | } |
d5ddad41 | 2468 | return ret; |
c66ac9db NB |
2469 | } |
2470 | EXPORT_SYMBOL(transport_generic_free_cmd); | |
2471 | ||
a17f091d NB |
2472 | /* target_get_sess_cmd - Add command to active ->sess_cmd_list |
2473 | * @se_sess: session to reference | |
2474 | * @se_cmd: command descriptor to add | |
a6360785 | 2475 | * @ack_kref: Signal that fabric will perform an ack target_put_sess_cmd() |
a17f091d | 2476 | */ |
20361e69 | 2477 | int target_get_sess_cmd(struct se_session *se_sess, struct se_cmd *se_cmd, |
bc187ea6 | 2478 | bool ack_kref) |
a17f091d NB |
2479 | { |
2480 | unsigned long flags; | |
bc187ea6 | 2481 | int ret = 0; |
a17f091d | 2482 | |
a6360785 NB |
2483 | /* |
2484 | * Add a second kref if the fabric caller is expecting to handle | |
2485 | * fabric acknowledgement that requires two target_put_sess_cmd() | |
2486 | * invocations before se_cmd descriptor release. | |
2487 | */ | |
054922bb | 2488 | if (ack_kref) |
a6360785 | 2489 | kref_get(&se_cmd->cmd_kref); |
7481deb4 | 2490 | |
a17f091d | 2491 | spin_lock_irqsave(&se_sess->sess_cmd_lock, flags); |
bc187ea6 RD |
2492 | if (se_sess->sess_tearing_down) { |
2493 | ret = -ESHUTDOWN; | |
2494 | goto out; | |
2495 | } | |
a17f091d | 2496 | list_add_tail(&se_cmd->se_cmd_list, &se_sess->sess_cmd_list); |
bc187ea6 | 2497 | out: |
a17f091d | 2498 | spin_unlock_irqrestore(&se_sess->sess_cmd_lock, flags); |
7544e597 BVA |
2499 | |
2500 | if (ret && ack_kref) | |
2501 | target_put_sess_cmd(se_sess, se_cmd); | |
2502 | ||
bc187ea6 | 2503 | return ret; |
a17f091d | 2504 | } |
20361e69 | 2505 | EXPORT_SYMBOL(target_get_sess_cmd); |
a17f091d | 2506 | |
7481deb4 | 2507 | static void target_release_cmd_kref(struct kref *kref) |
077aa3b2 | 2508 | __releases(&se_cmd->se_sess->sess_cmd_lock) |
a17f091d | 2509 | { |
7481deb4 NB |
2510 | struct se_cmd *se_cmd = container_of(kref, struct se_cmd, cmd_kref); |
2511 | struct se_session *se_sess = se_cmd->se_sess; | |
a17f091d | 2512 | |
a17f091d | 2513 | if (list_empty(&se_cmd->se_cmd_list)) { |
ccf5ae83 | 2514 | spin_unlock(&se_sess->sess_cmd_lock); |
ffc32d52 | 2515 | se_cmd->se_tfo->release_cmd(se_cmd); |
7481deb4 | 2516 | return; |
a17f091d | 2517 | } |
a17f091d | 2518 | if (se_sess->sess_tearing_down && se_cmd->cmd_wait_set) { |
ccf5ae83 | 2519 | spin_unlock(&se_sess->sess_cmd_lock); |
a17f091d | 2520 | complete(&se_cmd->cmd_wait_comp); |
7481deb4 | 2521 | return; |
a17f091d NB |
2522 | } |
2523 | list_del(&se_cmd->se_cmd_list); | |
ccf5ae83 | 2524 | spin_unlock(&se_sess->sess_cmd_lock); |
a17f091d | 2525 | |
7481deb4 NB |
2526 | se_cmd->se_tfo->release_cmd(se_cmd); |
2527 | } | |
2528 | ||
2529 | /* target_put_sess_cmd - Check for active I/O shutdown via kref_put | |
2530 | * @se_sess: session to reference | |
2531 | * @se_cmd: command descriptor to drop | |
2532 | */ | |
2533 | int target_put_sess_cmd(struct se_session *se_sess, struct se_cmd *se_cmd) | |
2534 | { | |
0ed6e189 NB |
2535 | if (!se_sess) { |
2536 | se_cmd->se_tfo->release_cmd(se_cmd); | |
2537 | return 1; | |
2538 | } | |
ccf5ae83 JE |
2539 | return kref_put_spinlock_irqsave(&se_cmd->cmd_kref, target_release_cmd_kref, |
2540 | &se_sess->sess_cmd_lock); | |
a17f091d NB |
2541 | } |
2542 | EXPORT_SYMBOL(target_put_sess_cmd); | |
2543 | ||
1c7b13fe RD |
2544 | /* target_sess_cmd_list_set_waiting - Flag all commands in |
2545 | * sess_cmd_list to complete cmd_wait_comp. Set | |
2546 | * sess_tearing_down so no more commands are queued. | |
2547 | * @se_sess: session to flag | |
a17f091d | 2548 | */ |
1c7b13fe | 2549 | void target_sess_cmd_list_set_waiting(struct se_session *se_sess) |
a17f091d NB |
2550 | { |
2551 | struct se_cmd *se_cmd; | |
2552 | unsigned long flags; | |
2553 | ||
a17f091d | 2554 | spin_lock_irqsave(&se_sess->sess_cmd_lock, flags); |
9b31a328 NB |
2555 | if (se_sess->sess_tearing_down) { |
2556 | spin_unlock_irqrestore(&se_sess->sess_cmd_lock, flags); | |
2557 | return; | |
2558 | } | |
1c7b13fe | 2559 | se_sess->sess_tearing_down = 1; |
9b31a328 | 2560 | list_splice_init(&se_sess->sess_cmd_list, &se_sess->sess_wait_list); |
a17f091d | 2561 | |
9b31a328 | 2562 | list_for_each_entry(se_cmd, &se_sess->sess_wait_list, se_cmd_list) |
a17f091d NB |
2563 | se_cmd->cmd_wait_set = 1; |
2564 | ||
2565 | spin_unlock_irqrestore(&se_sess->sess_cmd_lock, flags); | |
2566 | } | |
1c7b13fe | 2567 | EXPORT_SYMBOL(target_sess_cmd_list_set_waiting); |
a17f091d NB |
2568 | |
2569 | /* target_wait_for_sess_cmds - Wait for outstanding descriptors | |
2570 | * @se_sess: session to wait for active I/O | |
a17f091d | 2571 | */ |
be646c2d | 2572 | void target_wait_for_sess_cmds(struct se_session *se_sess) |
a17f091d NB |
2573 | { |
2574 | struct se_cmd *se_cmd, *tmp_cmd; | |
9b31a328 | 2575 | unsigned long flags; |
a17f091d NB |
2576 | |
2577 | list_for_each_entry_safe(se_cmd, tmp_cmd, | |
9b31a328 | 2578 | &se_sess->sess_wait_list, se_cmd_list) { |
a17f091d NB |
2579 | list_del(&se_cmd->se_cmd_list); |
2580 | ||
2581 | pr_debug("Waiting for se_cmd: %p t_state: %d, fabric state:" | |
2582 | " %d\n", se_cmd, se_cmd->t_state, | |
2583 | se_cmd->se_tfo->get_cmd_state(se_cmd)); | |
2584 | ||
be646c2d JE |
2585 | wait_for_completion(&se_cmd->cmd_wait_comp); |
2586 | pr_debug("After cmd_wait_comp: se_cmd: %p t_state: %d" | |
2587 | " fabric state: %d\n", se_cmd, se_cmd->t_state, | |
2588 | se_cmd->se_tfo->get_cmd_state(se_cmd)); | |
a17f091d NB |
2589 | |
2590 | se_cmd->se_tfo->release_cmd(se_cmd); | |
2591 | } | |
9b31a328 NB |
2592 | |
2593 | spin_lock_irqsave(&se_sess->sess_cmd_lock, flags); | |
2594 | WARN_ON(!list_empty(&se_sess->sess_cmd_list)); | |
2595 | spin_unlock_irqrestore(&se_sess->sess_cmd_lock, flags); | |
2596 | ||
a17f091d NB |
2597 | } |
2598 | EXPORT_SYMBOL(target_wait_for_sess_cmds); | |
2599 | ||
5277797d | 2600 | static int transport_clear_lun_ref_thread(void *p) |
c66ac9db | 2601 | { |
8359cf43 | 2602 | struct se_lun *lun = p; |
c66ac9db | 2603 | |
5277797d NB |
2604 | percpu_ref_kill(&lun->lun_ref); |
2605 | ||
2606 | wait_for_completion(&lun->lun_ref_comp); | |
c66ac9db NB |
2607 | complete(&lun->lun_shutdown_comp); |
2608 | ||
2609 | return 0; | |
2610 | } | |
2611 | ||
5277797d | 2612 | int transport_clear_lun_ref(struct se_lun *lun) |
c66ac9db NB |
2613 | { |
2614 | struct task_struct *kt; | |
2615 | ||
5277797d | 2616 | kt = kthread_run(transport_clear_lun_ref_thread, lun, |
c66ac9db NB |
2617 | "tcm_cl_%u", lun->unpacked_lun); |
2618 | if (IS_ERR(kt)) { | |
6708bb27 | 2619 | pr_err("Unable to start clear_lun thread\n"); |
e3d6f909 | 2620 | return PTR_ERR(kt); |
c66ac9db NB |
2621 | } |
2622 | wait_for_completion(&lun->lun_shutdown_comp); | |
2623 | ||
2624 | return 0; | |
2625 | } | |
2626 | ||
d14921d6 NB |
2627 | /** |
2628 | * transport_wait_for_tasks - wait for completion to occur | |
2629 | * @cmd: command to wait | |
c66ac9db | 2630 | * |
d14921d6 NB |
2631 | * Called from frontend fabric context to wait for storage engine |
2632 | * to pause and/or release frontend generated struct se_cmd. | |
c66ac9db | 2633 | */ |
a17f091d | 2634 | bool transport_wait_for_tasks(struct se_cmd *cmd) |
c66ac9db NB |
2635 | { |
2636 | unsigned long flags; | |
2637 | ||
a1d8b49a | 2638 | spin_lock_irqsave(&cmd->t_state_lock, flags); |
c8e31f26 AG |
2639 | if (!(cmd->se_cmd_flags & SCF_SE_LUN_CMD) && |
2640 | !(cmd->se_cmd_flags & SCF_SCSI_TMR_CDB)) { | |
d14921d6 | 2641 | spin_unlock_irqrestore(&cmd->t_state_lock, flags); |
a17f091d | 2642 | return false; |
d14921d6 | 2643 | } |
cb4f4d3c | 2644 | |
c8e31f26 AG |
2645 | if (!(cmd->se_cmd_flags & SCF_SUPPORTED_SAM_OPCODE) && |
2646 | !(cmd->se_cmd_flags & SCF_SCSI_TMR_CDB)) { | |
d14921d6 | 2647 | spin_unlock_irqrestore(&cmd->t_state_lock, flags); |
a17f091d | 2648 | return false; |
d14921d6 | 2649 | } |
7d680f3b | 2650 | |
3d28934a | 2651 | if (!(cmd->transport_state & CMD_T_ACTIVE)) { |
d14921d6 | 2652 | spin_unlock_irqrestore(&cmd->t_state_lock, flags); |
a17f091d | 2653 | return false; |
d14921d6 | 2654 | } |
c66ac9db | 2655 | |
7d680f3b | 2656 | cmd->transport_state |= CMD_T_STOP; |
c66ac9db | 2657 | |
6708bb27 | 2658 | pr_debug("wait_for_tasks: Stopping %p ITT: 0x%08x" |
7d680f3b | 2659 | " i_state: %d, t_state: %d, CMD_T_STOP\n", |
f2da9dbd CH |
2660 | cmd, cmd->se_tfo->get_task_tag(cmd), |
2661 | cmd->se_tfo->get_cmd_state(cmd), cmd->t_state); | |
c66ac9db | 2662 | |
a1d8b49a | 2663 | spin_unlock_irqrestore(&cmd->t_state_lock, flags); |
c66ac9db | 2664 | |
a1d8b49a | 2665 | wait_for_completion(&cmd->t_transport_stop_comp); |
c66ac9db | 2666 | |
a1d8b49a | 2667 | spin_lock_irqsave(&cmd->t_state_lock, flags); |
7d680f3b | 2668 | cmd->transport_state &= ~(CMD_T_ACTIVE | CMD_T_STOP); |
c66ac9db | 2669 | |
35d1efe8 | 2670 | pr_debug("wait_for_tasks: Stopped wait_for_completion(" |
a1d8b49a | 2671 | "&cmd->t_transport_stop_comp) for ITT: 0x%08x\n", |
e3d6f909 | 2672 | cmd->se_tfo->get_task_tag(cmd)); |
c66ac9db | 2673 | |
d14921d6 | 2674 | spin_unlock_irqrestore(&cmd->t_state_lock, flags); |
a17f091d NB |
2675 | |
2676 | return true; | |
c66ac9db | 2677 | } |
d14921d6 | 2678 | EXPORT_SYMBOL(transport_wait_for_tasks); |
c66ac9db NB |
2679 | |
2680 | static int transport_get_sense_codes( | |
2681 | struct se_cmd *cmd, | |
2682 | u8 *asc, | |
2683 | u8 *ascq) | |
2684 | { | |
2685 | *asc = cmd->scsi_asc; | |
2686 | *ascq = cmd->scsi_ascq; | |
2687 | ||
2688 | return 0; | |
2689 | } | |
2690 | ||
76736db3 SG |
2691 | static |
2692 | void transport_err_sector_info(unsigned char *buffer, sector_t bad_sector) | |
2693 | { | |
2694 | /* Place failed LBA in sense data information descriptor 0. */ | |
2695 | buffer[SPC_ADD_SENSE_LEN_OFFSET] = 0xc; | |
2696 | buffer[SPC_DESC_TYPE_OFFSET] = 0; /* Information */ | |
2697 | buffer[SPC_ADDITIONAL_DESC_LEN_OFFSET] = 0xa; | |
2698 | buffer[SPC_VALIDITY_OFFSET] = 0x80; | |
2699 | ||
2700 | /* Descriptor Information: failing sector */ | |
2701 | put_unaligned_be64(bad_sector, &buffer[12]); | |
2702 | } | |
2703 | ||
de103c93 CH |
2704 | int |
2705 | transport_send_check_condition_and_sense(struct se_cmd *cmd, | |
2706 | sense_reason_t reason, int from_transport) | |
c66ac9db NB |
2707 | { |
2708 | unsigned char *buffer = cmd->sense_buffer; | |
2709 | unsigned long flags; | |
c66ac9db NB |
2710 | u8 asc = 0, ascq = 0; |
2711 | ||
a1d8b49a | 2712 | spin_lock_irqsave(&cmd->t_state_lock, flags); |
c66ac9db | 2713 | if (cmd->se_cmd_flags & SCF_SENT_CHECK_CONDITION) { |
a1d8b49a | 2714 | spin_unlock_irqrestore(&cmd->t_state_lock, flags); |
c66ac9db NB |
2715 | return 0; |
2716 | } | |
2717 | cmd->se_cmd_flags |= SCF_SENT_CHECK_CONDITION; | |
a1d8b49a | 2718 | spin_unlock_irqrestore(&cmd->t_state_lock, flags); |
c66ac9db NB |
2719 | |
2720 | if (!reason && from_transport) | |
2721 | goto after_reason; | |
2722 | ||
2723 | if (!from_transport) | |
2724 | cmd->se_cmd_flags |= SCF_EMULATED_TASK_SENSE; | |
9c58b7dd | 2725 | |
c66ac9db NB |
2726 | /* |
2727 | * Actual SENSE DATA, see SPC-3 7.23.2 SPC_SENSE_KEY_OFFSET uses | |
2728 | * SENSE KEY values from include/scsi/scsi.h | |
2729 | */ | |
2730 | switch (reason) { | |
ba829137 HR |
2731 | case TCM_NO_SENSE: |
2732 | /* CURRENT ERROR */ | |
2733 | buffer[0] = 0x70; | |
2734 | buffer[SPC_ADD_SENSE_LEN_OFFSET] = 10; | |
2735 | /* Not Ready */ | |
2736 | buffer[SPC_SENSE_KEY_OFFSET] = NOT_READY; | |
2737 | /* NO ADDITIONAL SENSE INFORMATION */ | |
2738 | buffer[SPC_ASC_KEY_OFFSET] = 0; | |
2739 | buffer[SPC_ASCQ_KEY_OFFSET] = 0; | |
2740 | break; | |
c66ac9db | 2741 | case TCM_NON_EXISTENT_LUN: |
eb39d340 | 2742 | /* CURRENT ERROR */ |
9c58b7dd RD |
2743 | buffer[0] = 0x70; |
2744 | buffer[SPC_ADD_SENSE_LEN_OFFSET] = 10; | |
eb39d340 | 2745 | /* ILLEGAL REQUEST */ |
9c58b7dd | 2746 | buffer[SPC_SENSE_KEY_OFFSET] = ILLEGAL_REQUEST; |
eb39d340 | 2747 | /* LOGICAL UNIT NOT SUPPORTED */ |
9c58b7dd | 2748 | buffer[SPC_ASC_KEY_OFFSET] = 0x25; |
eb39d340 | 2749 | break; |
c66ac9db NB |
2750 | case TCM_UNSUPPORTED_SCSI_OPCODE: |
2751 | case TCM_SECTOR_COUNT_TOO_MANY: | |
2752 | /* CURRENT ERROR */ | |
9c58b7dd RD |
2753 | buffer[0] = 0x70; |
2754 | buffer[SPC_ADD_SENSE_LEN_OFFSET] = 10; | |
c66ac9db | 2755 | /* ILLEGAL REQUEST */ |
9c58b7dd | 2756 | buffer[SPC_SENSE_KEY_OFFSET] = ILLEGAL_REQUEST; |
c66ac9db | 2757 | /* INVALID COMMAND OPERATION CODE */ |
9c58b7dd | 2758 | buffer[SPC_ASC_KEY_OFFSET] = 0x20; |
c66ac9db NB |
2759 | break; |
2760 | case TCM_UNKNOWN_MODE_PAGE: | |
2761 | /* CURRENT ERROR */ | |
9c58b7dd RD |
2762 | buffer[0] = 0x70; |
2763 | buffer[SPC_ADD_SENSE_LEN_OFFSET] = 10; | |
c66ac9db | 2764 | /* ILLEGAL REQUEST */ |
9c58b7dd | 2765 | buffer[SPC_SENSE_KEY_OFFSET] = ILLEGAL_REQUEST; |
c66ac9db | 2766 | /* INVALID FIELD IN CDB */ |
9c58b7dd | 2767 | buffer[SPC_ASC_KEY_OFFSET] = 0x24; |
c66ac9db NB |
2768 | break; |
2769 | case TCM_CHECK_CONDITION_ABORT_CMD: | |
2770 | /* CURRENT ERROR */ | |
9c58b7dd RD |
2771 | buffer[0] = 0x70; |
2772 | buffer[SPC_ADD_SENSE_LEN_OFFSET] = 10; | |
c66ac9db | 2773 | /* ABORTED COMMAND */ |
9c58b7dd | 2774 | buffer[SPC_SENSE_KEY_OFFSET] = ABORTED_COMMAND; |
c66ac9db | 2775 | /* BUS DEVICE RESET FUNCTION OCCURRED */ |
9c58b7dd RD |
2776 | buffer[SPC_ASC_KEY_OFFSET] = 0x29; |
2777 | buffer[SPC_ASCQ_KEY_OFFSET] = 0x03; | |
c66ac9db NB |
2778 | break; |
2779 | case TCM_INCORRECT_AMOUNT_OF_DATA: | |
2780 | /* CURRENT ERROR */ | |
9c58b7dd RD |
2781 | buffer[0] = 0x70; |
2782 | buffer[SPC_ADD_SENSE_LEN_OFFSET] = 10; | |
c66ac9db | 2783 | /* ABORTED COMMAND */ |
9c58b7dd | 2784 | buffer[SPC_SENSE_KEY_OFFSET] = ABORTED_COMMAND; |
c66ac9db | 2785 | /* WRITE ERROR */ |
9c58b7dd | 2786 | buffer[SPC_ASC_KEY_OFFSET] = 0x0c; |
c66ac9db | 2787 | /* NOT ENOUGH UNSOLICITED DATA */ |
9c58b7dd | 2788 | buffer[SPC_ASCQ_KEY_OFFSET] = 0x0d; |
c66ac9db NB |
2789 | break; |
2790 | case TCM_INVALID_CDB_FIELD: | |
2791 | /* CURRENT ERROR */ | |
9c58b7dd RD |
2792 | buffer[0] = 0x70; |
2793 | buffer[SPC_ADD_SENSE_LEN_OFFSET] = 10; | |
9fbc8909 | 2794 | /* ILLEGAL REQUEST */ |
9c58b7dd | 2795 | buffer[SPC_SENSE_KEY_OFFSET] = ILLEGAL_REQUEST; |
c66ac9db | 2796 | /* INVALID FIELD IN CDB */ |
9c58b7dd | 2797 | buffer[SPC_ASC_KEY_OFFSET] = 0x24; |
c66ac9db NB |
2798 | break; |
2799 | case TCM_INVALID_PARAMETER_LIST: | |
2800 | /* CURRENT ERROR */ | |
9c58b7dd RD |
2801 | buffer[0] = 0x70; |
2802 | buffer[SPC_ADD_SENSE_LEN_OFFSET] = 10; | |
9fbc8909 | 2803 | /* ILLEGAL REQUEST */ |
9c58b7dd | 2804 | buffer[SPC_SENSE_KEY_OFFSET] = ILLEGAL_REQUEST; |
c66ac9db | 2805 | /* INVALID FIELD IN PARAMETER LIST */ |
9c58b7dd | 2806 | buffer[SPC_ASC_KEY_OFFSET] = 0x26; |
c66ac9db | 2807 | break; |
bb992e72 RD |
2808 | case TCM_PARAMETER_LIST_LENGTH_ERROR: |
2809 | /* CURRENT ERROR */ | |
2810 | buffer[0] = 0x70; | |
2811 | buffer[SPC_ADD_SENSE_LEN_OFFSET] = 10; | |
2812 | /* ILLEGAL REQUEST */ | |
2813 | buffer[SPC_SENSE_KEY_OFFSET] = ILLEGAL_REQUEST; | |
2814 | /* PARAMETER LIST LENGTH ERROR */ | |
2815 | buffer[SPC_ASC_KEY_OFFSET] = 0x1a; | |
2816 | break; | |
c66ac9db NB |
2817 | case TCM_UNEXPECTED_UNSOLICITED_DATA: |
2818 | /* CURRENT ERROR */ | |
9c58b7dd RD |
2819 | buffer[0] = 0x70; |
2820 | buffer[SPC_ADD_SENSE_LEN_OFFSET] = 10; | |
c66ac9db | 2821 | /* ABORTED COMMAND */ |
9c58b7dd | 2822 | buffer[SPC_SENSE_KEY_OFFSET] = ABORTED_COMMAND; |
c66ac9db | 2823 | /* WRITE ERROR */ |
9c58b7dd | 2824 | buffer[SPC_ASC_KEY_OFFSET] = 0x0c; |
c66ac9db | 2825 | /* UNEXPECTED_UNSOLICITED_DATA */ |
9c58b7dd | 2826 | buffer[SPC_ASCQ_KEY_OFFSET] = 0x0c; |
c66ac9db NB |
2827 | break; |
2828 | case TCM_SERVICE_CRC_ERROR: | |
2829 | /* CURRENT ERROR */ | |
9c58b7dd RD |
2830 | buffer[0] = 0x70; |
2831 | buffer[SPC_ADD_SENSE_LEN_OFFSET] = 10; | |
c66ac9db | 2832 | /* ABORTED COMMAND */ |
9c58b7dd | 2833 | buffer[SPC_SENSE_KEY_OFFSET] = ABORTED_COMMAND; |
c66ac9db | 2834 | /* PROTOCOL SERVICE CRC ERROR */ |
9c58b7dd | 2835 | buffer[SPC_ASC_KEY_OFFSET] = 0x47; |
c66ac9db | 2836 | /* N/A */ |
9c58b7dd | 2837 | buffer[SPC_ASCQ_KEY_OFFSET] = 0x05; |
c66ac9db NB |
2838 | break; |
2839 | case TCM_SNACK_REJECTED: | |
2840 | /* CURRENT ERROR */ | |
9c58b7dd RD |
2841 | buffer[0] = 0x70; |
2842 | buffer[SPC_ADD_SENSE_LEN_OFFSET] = 10; | |
c66ac9db | 2843 | /* ABORTED COMMAND */ |
9c58b7dd | 2844 | buffer[SPC_SENSE_KEY_OFFSET] = ABORTED_COMMAND; |
c66ac9db | 2845 | /* READ ERROR */ |
9c58b7dd | 2846 | buffer[SPC_ASC_KEY_OFFSET] = 0x11; |
c66ac9db | 2847 | /* FAILED RETRANSMISSION REQUEST */ |
9c58b7dd | 2848 | buffer[SPC_ASCQ_KEY_OFFSET] = 0x13; |
c66ac9db NB |
2849 | break; |
2850 | case TCM_WRITE_PROTECTED: | |
2851 | /* CURRENT ERROR */ | |
9c58b7dd RD |
2852 | buffer[0] = 0x70; |
2853 | buffer[SPC_ADD_SENSE_LEN_OFFSET] = 10; | |
c66ac9db | 2854 | /* DATA PROTECT */ |
9c58b7dd | 2855 | buffer[SPC_SENSE_KEY_OFFSET] = DATA_PROTECT; |
c66ac9db | 2856 | /* WRITE PROTECTED */ |
9c58b7dd | 2857 | buffer[SPC_ASC_KEY_OFFSET] = 0x27; |
c66ac9db | 2858 | break; |
e2397c70 RD |
2859 | case TCM_ADDRESS_OUT_OF_RANGE: |
2860 | /* CURRENT ERROR */ | |
9c58b7dd RD |
2861 | buffer[0] = 0x70; |
2862 | buffer[SPC_ADD_SENSE_LEN_OFFSET] = 10; | |
e2397c70 | 2863 | /* ILLEGAL REQUEST */ |
9c58b7dd | 2864 | buffer[SPC_SENSE_KEY_OFFSET] = ILLEGAL_REQUEST; |
e2397c70 | 2865 | /* LOGICAL BLOCK ADDRESS OUT OF RANGE */ |
9c58b7dd | 2866 | buffer[SPC_ASC_KEY_OFFSET] = 0x21; |
e2397c70 | 2867 | break; |
c66ac9db NB |
2868 | case TCM_CHECK_CONDITION_UNIT_ATTENTION: |
2869 | /* CURRENT ERROR */ | |
9c58b7dd RD |
2870 | buffer[0] = 0x70; |
2871 | buffer[SPC_ADD_SENSE_LEN_OFFSET] = 10; | |
c66ac9db | 2872 | /* UNIT ATTENTION */ |
9c58b7dd | 2873 | buffer[SPC_SENSE_KEY_OFFSET] = UNIT_ATTENTION; |
c66ac9db | 2874 | core_scsi3_ua_for_check_condition(cmd, &asc, &ascq); |
9c58b7dd RD |
2875 | buffer[SPC_ASC_KEY_OFFSET] = asc; |
2876 | buffer[SPC_ASCQ_KEY_OFFSET] = ascq; | |
c66ac9db NB |
2877 | break; |
2878 | case TCM_CHECK_CONDITION_NOT_READY: | |
2879 | /* CURRENT ERROR */ | |
9c58b7dd RD |
2880 | buffer[0] = 0x70; |
2881 | buffer[SPC_ADD_SENSE_LEN_OFFSET] = 10; | |
c66ac9db | 2882 | /* Not Ready */ |
9c58b7dd | 2883 | buffer[SPC_SENSE_KEY_OFFSET] = NOT_READY; |
c66ac9db | 2884 | transport_get_sense_codes(cmd, &asc, &ascq); |
9c58b7dd RD |
2885 | buffer[SPC_ASC_KEY_OFFSET] = asc; |
2886 | buffer[SPC_ASCQ_KEY_OFFSET] = ascq; | |
c66ac9db | 2887 | break; |
818b571c NB |
2888 | case TCM_MISCOMPARE_VERIFY: |
2889 | /* CURRENT ERROR */ | |
2890 | buffer[0] = 0x70; | |
2891 | buffer[SPC_ADD_SENSE_LEN_OFFSET] = 10; | |
2892 | buffer[SPC_SENSE_KEY_OFFSET] = MISCOMPARE; | |
2893 | /* MISCOMPARE DURING VERIFY OPERATION */ | |
2894 | buffer[SPC_ASC_KEY_OFFSET] = 0x1d; | |
2895 | buffer[SPC_ASCQ_KEY_OFFSET] = 0x00; | |
2896 | break; | |
fcc4f17b NB |
2897 | case TCM_LOGICAL_BLOCK_GUARD_CHECK_FAILED: |
2898 | /* CURRENT ERROR */ | |
2899 | buffer[0] = 0x70; | |
2900 | buffer[SPC_ADD_SENSE_LEN_OFFSET] = 10; | |
2901 | /* ILLEGAL REQUEST */ | |
2902 | buffer[SPC_SENSE_KEY_OFFSET] = ILLEGAL_REQUEST; | |
2903 | /* LOGICAL BLOCK GUARD CHECK FAILED */ | |
2904 | buffer[SPC_ASC_KEY_OFFSET] = 0x10; | |
2905 | buffer[SPC_ASCQ_KEY_OFFSET] = 0x01; | |
76736db3 | 2906 | transport_err_sector_info(buffer, cmd->bad_sector); |
fcc4f17b NB |
2907 | break; |
2908 | case TCM_LOGICAL_BLOCK_APP_TAG_CHECK_FAILED: | |
2909 | /* CURRENT ERROR */ | |
2910 | buffer[0] = 0x70; | |
2911 | buffer[SPC_ADD_SENSE_LEN_OFFSET] = 10; | |
2912 | /* ILLEGAL REQUEST */ | |
2913 | buffer[SPC_SENSE_KEY_OFFSET] = ILLEGAL_REQUEST; | |
2914 | /* LOGICAL BLOCK APPLICATION TAG CHECK FAILED */ | |
2915 | buffer[SPC_ASC_KEY_OFFSET] = 0x10; | |
2916 | buffer[SPC_ASCQ_KEY_OFFSET] = 0x02; | |
76736db3 | 2917 | transport_err_sector_info(buffer, cmd->bad_sector); |
fcc4f17b NB |
2918 | break; |
2919 | case TCM_LOGICAL_BLOCK_REF_TAG_CHECK_FAILED: | |
2920 | /* CURRENT ERROR */ | |
2921 | buffer[0] = 0x70; | |
2922 | buffer[SPC_ADD_SENSE_LEN_OFFSET] = 10; | |
2923 | /* ILLEGAL REQUEST */ | |
2924 | buffer[SPC_SENSE_KEY_OFFSET] = ILLEGAL_REQUEST; | |
2925 | /* LOGICAL BLOCK REFERENCE TAG CHECK FAILED */ | |
2926 | buffer[SPC_ASC_KEY_OFFSET] = 0x10; | |
2927 | buffer[SPC_ASCQ_KEY_OFFSET] = 0x03; | |
76736db3 | 2928 | transport_err_sector_info(buffer, cmd->bad_sector); |
fcc4f17b | 2929 | break; |
c66ac9db NB |
2930 | case TCM_LOGICAL_UNIT_COMMUNICATION_FAILURE: |
2931 | default: | |
2932 | /* CURRENT ERROR */ | |
9c58b7dd RD |
2933 | buffer[0] = 0x70; |
2934 | buffer[SPC_ADD_SENSE_LEN_OFFSET] = 10; | |
ad673282 JE |
2935 | /* |
2936 | * Returning ILLEGAL REQUEST would cause immediate IO errors on | |
2937 | * Solaris initiators. Returning NOT READY instead means the | |
2938 | * operations will be retried a finite number of times and we | |
2939 | * can survive intermittent errors. | |
2940 | */ | |
2941 | buffer[SPC_SENSE_KEY_OFFSET] = NOT_READY; | |
c66ac9db | 2942 | /* LOGICAL UNIT COMMUNICATION FAILURE */ |
18a9df42 | 2943 | buffer[SPC_ASC_KEY_OFFSET] = 0x08; |
c66ac9db NB |
2944 | break; |
2945 | } | |
2946 | /* | |
2947 | * This code uses linux/include/scsi/scsi.h SAM status codes! | |
2948 | */ | |
2949 | cmd->scsi_status = SAM_STAT_CHECK_CONDITION; | |
2950 | /* | |
2951 | * Automatically padded, this value is encoded in the fabric's | |
2952 | * data_length response PDU containing the SCSI defined sense data. | |
2953 | */ | |
9c58b7dd | 2954 | cmd->scsi_sense_length = TRANSPORT_SENSE_BUFFER; |
c66ac9db NB |
2955 | |
2956 | after_reason: | |
e5c0d6ad | 2957 | trace_target_cmd_complete(cmd); |
07bde79a | 2958 | return cmd->se_tfo->queue_status(cmd); |
c66ac9db NB |
2959 | } |
2960 | EXPORT_SYMBOL(transport_send_check_condition_and_sense); | |
2961 | ||
2962 | int transport_check_aborted_status(struct se_cmd *cmd, int send_status) | |
2963 | { | |
c18bc7d8 RD |
2964 | if (!(cmd->transport_state & CMD_T_ABORTED)) |
2965 | return 0; | |
c66ac9db | 2966 | |
68259b5a AL |
2967 | /* |
2968 | * If cmd has been aborted but either no status is to be sent or it has | |
2969 | * already been sent, just return | |
2970 | */ | |
2971 | if (!send_status || !(cmd->se_cmd_flags & SCF_SEND_DELAYED_TAS)) | |
c18bc7d8 | 2972 | return 1; |
8b1e1244 | 2973 | |
c18bc7d8 RD |
2974 | pr_debug("Sending delayed SAM_STAT_TASK_ABORTED status for CDB: 0x%02x ITT: 0x%08x\n", |
2975 | cmd->t_task_cdb[0], cmd->se_tfo->get_task_tag(cmd)); | |
8b1e1244 | 2976 | |
68259b5a | 2977 | cmd->se_cmd_flags &= ~SCF_SEND_DELAYED_TAS; |
29f4c090 | 2978 | cmd->scsi_status = SAM_STAT_TASK_ABORTED; |
e5c0d6ad | 2979 | trace_target_cmd_complete(cmd); |
c18bc7d8 RD |
2980 | cmd->se_tfo->queue_status(cmd); |
2981 | ||
2982 | return 1; | |
c66ac9db NB |
2983 | } |
2984 | EXPORT_SYMBOL(transport_check_aborted_status); | |
2985 | ||
2986 | void transport_send_task_abort(struct se_cmd *cmd) | |
2987 | { | |
c252f003 NB |
2988 | unsigned long flags; |
2989 | ||
2990 | spin_lock_irqsave(&cmd->t_state_lock, flags); | |
68259b5a | 2991 | if (cmd->se_cmd_flags & (SCF_SENT_CHECK_CONDITION)) { |
c252f003 NB |
2992 | spin_unlock_irqrestore(&cmd->t_state_lock, flags); |
2993 | return; | |
2994 | } | |
2995 | spin_unlock_irqrestore(&cmd->t_state_lock, flags); | |
2996 | ||
c66ac9db NB |
2997 | /* |
2998 | * If there are still expected incoming fabric WRITEs, we wait | |
2999 | * until until they have completed before sending a TASK_ABORTED | |
3000 | * response. This response with TASK_ABORTED status will be | |
3001 | * queued back to fabric module by transport_check_aborted_status(). | |
3002 | */ | |
3003 | if (cmd->data_direction == DMA_TO_DEVICE) { | |
e3d6f909 | 3004 | if (cmd->se_tfo->write_pending_status(cmd) != 0) { |
7d680f3b | 3005 | cmd->transport_state |= CMD_T_ABORTED; |
68259b5a | 3006 | cmd->se_cmd_flags |= SCF_SEND_DELAYED_TAS; |
29f4c090 | 3007 | return; |
c66ac9db NB |
3008 | } |
3009 | } | |
3010 | cmd->scsi_status = SAM_STAT_TASK_ABORTED; | |
8b1e1244 | 3011 | |
72b59d6e RD |
3012 | transport_lun_remove_cmd(cmd); |
3013 | ||
6708bb27 | 3014 | pr_debug("Setting SAM_STAT_TASK_ABORTED status for CDB: 0x%02x," |
a1d8b49a | 3015 | " ITT: 0x%08x\n", cmd->t_task_cdb[0], |
e3d6f909 | 3016 | cmd->se_tfo->get_task_tag(cmd)); |
8b1e1244 | 3017 | |
e5c0d6ad | 3018 | trace_target_cmd_complete(cmd); |
e3d6f909 | 3019 | cmd->se_tfo->queue_status(cmd); |
c66ac9db NB |
3020 | } |
3021 | ||
af877292 | 3022 | static void target_tmr_work(struct work_struct *work) |
c66ac9db | 3023 | { |
af877292 | 3024 | struct se_cmd *cmd = container_of(work, struct se_cmd, work); |
5951146d | 3025 | struct se_device *dev = cmd->se_dev; |
c66ac9db NB |
3026 | struct se_tmr_req *tmr = cmd->se_tmr_req; |
3027 | int ret; | |
3028 | ||
3029 | switch (tmr->function) { | |
5c6cd613 | 3030 | case TMR_ABORT_TASK: |
3d28934a | 3031 | core_tmr_abort_task(dev, tmr, cmd->se_sess); |
c66ac9db | 3032 | break; |
5c6cd613 NB |
3033 | case TMR_ABORT_TASK_SET: |
3034 | case TMR_CLEAR_ACA: | |
3035 | case TMR_CLEAR_TASK_SET: | |
c66ac9db NB |
3036 | tmr->response = TMR_TASK_MGMT_FUNCTION_NOT_SUPPORTED; |
3037 | break; | |
5c6cd613 | 3038 | case TMR_LUN_RESET: |
c66ac9db NB |
3039 | ret = core_tmr_lun_reset(dev, tmr, NULL, NULL); |
3040 | tmr->response = (!ret) ? TMR_FUNCTION_COMPLETE : | |
3041 | TMR_FUNCTION_REJECTED; | |
3042 | break; | |
5c6cd613 | 3043 | case TMR_TARGET_WARM_RESET: |
c66ac9db NB |
3044 | tmr->response = TMR_FUNCTION_REJECTED; |
3045 | break; | |
5c6cd613 | 3046 | case TMR_TARGET_COLD_RESET: |
c66ac9db NB |
3047 | tmr->response = TMR_FUNCTION_REJECTED; |
3048 | break; | |
c66ac9db | 3049 | default: |
6708bb27 | 3050 | pr_err("Uknown TMR function: 0x%02x.\n", |
c66ac9db NB |
3051 | tmr->function); |
3052 | tmr->response = TMR_FUNCTION_REJECTED; | |
3053 | break; | |
3054 | } | |
3055 | ||
3056 | cmd->t_state = TRANSPORT_ISTATE_PROCESSING; | |
e3d6f909 | 3057 | cmd->se_tfo->queue_tm_rsp(cmd); |
c66ac9db | 3058 | |
b7b8bef7 | 3059 | transport_cmd_check_stop_to_fabric(cmd); |
c66ac9db NB |
3060 | } |
3061 | ||
af877292 CH |
3062 | int transport_generic_handle_tmr( |
3063 | struct se_cmd *cmd) | |
c66ac9db | 3064 | { |
f15e9cd9 NB |
3065 | unsigned long flags; |
3066 | ||
3067 | spin_lock_irqsave(&cmd->t_state_lock, flags); | |
3068 | cmd->transport_state |= CMD_T_ACTIVE; | |
3069 | spin_unlock_irqrestore(&cmd->t_state_lock, flags); | |
3070 | ||
af877292 CH |
3071 | INIT_WORK(&cmd->work, target_tmr_work); |
3072 | queue_work(cmd->se_dev->tmr_wq, &cmd->work); | |
c66ac9db NB |
3073 | return 0; |
3074 | } | |
af877292 | 3075 | EXPORT_SYMBOL(transport_generic_handle_tmr); |
814e5b45 CH |
3076 | |
3077 | bool | |
3078 | target_check_wce(struct se_device *dev) | |
3079 | { | |
3080 | bool wce = false; | |
3081 | ||
3082 | if (dev->transport->get_write_cache) | |
3083 | wce = dev->transport->get_write_cache(dev); | |
3084 | else if (dev->dev_attrib.emulate_write_cache > 0) | |
3085 | wce = true; | |
3086 | ||
3087 | return wce; | |
3088 | } | |
3089 | ||
3090 | bool | |
3091 | target_check_fua(struct se_device *dev) | |
3092 | { | |
3093 | return target_check_wce(dev) && dev->dev_attrib.emulate_fua_write > 0; | |
3094 | } |