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c66ac9db NB |
1 | /******************************************************************************* |
2 | * Filename: target_core_transport.c | |
3 | * | |
4 | * This file contains the Generic Target Engine Core. | |
5 | * | |
6 | * Copyright (c) 2002, 2003, 2004, 2005 PyX Technologies, Inc. | |
7 | * Copyright (c) 2005, 2006, 2007 SBE, Inc. | |
8 | * Copyright (c) 2007-2010 Rising Tide Systems | |
9 | * Copyright (c) 2008-2010 Linux-iSCSI.org | |
10 | * | |
11 | * Nicholas A. Bellinger <nab@kernel.org> | |
12 | * | |
13 | * This program is free software; you can redistribute it and/or modify | |
14 | * it under the terms of the GNU General Public License as published by | |
15 | * the Free Software Foundation; either version 2 of the License, or | |
16 | * (at your option) any later version. | |
17 | * | |
18 | * This program is distributed in the hope that it will be useful, | |
19 | * but WITHOUT ANY WARRANTY; without even the implied warranty of | |
20 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
21 | * GNU General Public License for more details. | |
22 | * | |
23 | * You should have received a copy of the GNU General Public License | |
24 | * along with this program; if not, write to the Free Software | |
25 | * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. | |
26 | * | |
27 | ******************************************************************************/ | |
28 | ||
c66ac9db NB |
29 | #include <linux/net.h> |
30 | #include <linux/delay.h> | |
31 | #include <linux/string.h> | |
32 | #include <linux/timer.h> | |
33 | #include <linux/slab.h> | |
34 | #include <linux/blkdev.h> | |
35 | #include <linux/spinlock.h> | |
c66ac9db NB |
36 | #include <linux/kthread.h> |
37 | #include <linux/in.h> | |
38 | #include <linux/cdrom.h> | |
827509e3 | 39 | #include <linux/module.h> |
015487b8 | 40 | #include <linux/ratelimit.h> |
c66ac9db NB |
41 | #include <asm/unaligned.h> |
42 | #include <net/sock.h> | |
43 | #include <net/tcp.h> | |
44 | #include <scsi/scsi.h> | |
45 | #include <scsi/scsi_cmnd.h> | |
e66ecd50 | 46 | #include <scsi/scsi_tcq.h> |
c66ac9db NB |
47 | |
48 | #include <target/target_core_base.h> | |
c4795fb2 CH |
49 | #include <target/target_core_backend.h> |
50 | #include <target/target_core_fabric.h> | |
c66ac9db NB |
51 | #include <target/target_core_configfs.h> |
52 | ||
e26d99ae | 53 | #include "target_core_internal.h" |
c66ac9db | 54 | #include "target_core_alua.h" |
c66ac9db | 55 | #include "target_core_pr.h" |
c66ac9db NB |
56 | #include "target_core_ua.h" |
57 | ||
e3d6f909 | 58 | static int sub_api_initialized; |
c66ac9db | 59 | |
35e0e757 | 60 | static struct workqueue_struct *target_completion_wq; |
c66ac9db | 61 | static struct kmem_cache *se_sess_cache; |
c66ac9db | 62 | struct kmem_cache *se_ua_cache; |
c66ac9db NB |
63 | struct kmem_cache *t10_pr_reg_cache; |
64 | struct kmem_cache *t10_alua_lu_gp_cache; | |
65 | struct kmem_cache *t10_alua_lu_gp_mem_cache; | |
66 | struct kmem_cache *t10_alua_tg_pt_gp_cache; | |
67 | struct kmem_cache *t10_alua_tg_pt_gp_mem_cache; | |
68 | ||
c66ac9db | 69 | static void transport_complete_task_attr(struct se_cmd *cmd); |
07bde79a | 70 | static void transport_handle_queue_full(struct se_cmd *cmd, |
e057f533 | 71 | struct se_device *dev); |
05d1c7c0 | 72 | static int transport_generic_get_mem(struct se_cmd *cmd); |
bc187ea6 | 73 | static int target_get_sess_cmd(struct se_session *, struct se_cmd *, bool); |
39c05f32 | 74 | static void transport_put_cmd(struct se_cmd *cmd); |
c66ac9db | 75 | static int transport_set_sense_codes(struct se_cmd *cmd, u8 asc, u8 ascq); |
35e0e757 | 76 | static void target_complete_ok_work(struct work_struct *work); |
c66ac9db | 77 | |
e3d6f909 | 78 | int init_se_kmem_caches(void) |
c66ac9db | 79 | { |
c66ac9db NB |
80 | se_sess_cache = kmem_cache_create("se_sess_cache", |
81 | sizeof(struct se_session), __alignof__(struct se_session), | |
82 | 0, NULL); | |
6708bb27 AG |
83 | if (!se_sess_cache) { |
84 | pr_err("kmem_cache_create() for struct se_session" | |
c66ac9db | 85 | " failed\n"); |
c8e31f26 | 86 | goto out; |
c66ac9db NB |
87 | } |
88 | se_ua_cache = kmem_cache_create("se_ua_cache", | |
89 | sizeof(struct se_ua), __alignof__(struct se_ua), | |
90 | 0, NULL); | |
6708bb27 AG |
91 | if (!se_ua_cache) { |
92 | pr_err("kmem_cache_create() for struct se_ua failed\n"); | |
35e0e757 | 93 | goto out_free_sess_cache; |
c66ac9db | 94 | } |
c66ac9db NB |
95 | t10_pr_reg_cache = kmem_cache_create("t10_pr_reg_cache", |
96 | sizeof(struct t10_pr_registration), | |
97 | __alignof__(struct t10_pr_registration), 0, NULL); | |
6708bb27 AG |
98 | if (!t10_pr_reg_cache) { |
99 | pr_err("kmem_cache_create() for struct t10_pr_registration" | |
c66ac9db | 100 | " failed\n"); |
35e0e757 | 101 | goto out_free_ua_cache; |
c66ac9db NB |
102 | } |
103 | t10_alua_lu_gp_cache = kmem_cache_create("t10_alua_lu_gp_cache", | |
104 | sizeof(struct t10_alua_lu_gp), __alignof__(struct t10_alua_lu_gp), | |
105 | 0, NULL); | |
6708bb27 AG |
106 | if (!t10_alua_lu_gp_cache) { |
107 | pr_err("kmem_cache_create() for t10_alua_lu_gp_cache" | |
c66ac9db | 108 | " failed\n"); |
35e0e757 | 109 | goto out_free_pr_reg_cache; |
c66ac9db NB |
110 | } |
111 | t10_alua_lu_gp_mem_cache = kmem_cache_create("t10_alua_lu_gp_mem_cache", | |
112 | sizeof(struct t10_alua_lu_gp_member), | |
113 | __alignof__(struct t10_alua_lu_gp_member), 0, NULL); | |
6708bb27 AG |
114 | if (!t10_alua_lu_gp_mem_cache) { |
115 | pr_err("kmem_cache_create() for t10_alua_lu_gp_mem_" | |
c66ac9db | 116 | "cache failed\n"); |
35e0e757 | 117 | goto out_free_lu_gp_cache; |
c66ac9db NB |
118 | } |
119 | t10_alua_tg_pt_gp_cache = kmem_cache_create("t10_alua_tg_pt_gp_cache", | |
120 | sizeof(struct t10_alua_tg_pt_gp), | |
121 | __alignof__(struct t10_alua_tg_pt_gp), 0, NULL); | |
6708bb27 AG |
122 | if (!t10_alua_tg_pt_gp_cache) { |
123 | pr_err("kmem_cache_create() for t10_alua_tg_pt_gp_" | |
c66ac9db | 124 | "cache failed\n"); |
35e0e757 | 125 | goto out_free_lu_gp_mem_cache; |
c66ac9db NB |
126 | } |
127 | t10_alua_tg_pt_gp_mem_cache = kmem_cache_create( | |
128 | "t10_alua_tg_pt_gp_mem_cache", | |
129 | sizeof(struct t10_alua_tg_pt_gp_member), | |
130 | __alignof__(struct t10_alua_tg_pt_gp_member), | |
131 | 0, NULL); | |
6708bb27 AG |
132 | if (!t10_alua_tg_pt_gp_mem_cache) { |
133 | pr_err("kmem_cache_create() for t10_alua_tg_pt_gp_" | |
c66ac9db | 134 | "mem_t failed\n"); |
35e0e757 | 135 | goto out_free_tg_pt_gp_cache; |
c66ac9db NB |
136 | } |
137 | ||
35e0e757 CH |
138 | target_completion_wq = alloc_workqueue("target_completion", |
139 | WQ_MEM_RECLAIM, 0); | |
140 | if (!target_completion_wq) | |
141 | goto out_free_tg_pt_gp_mem_cache; | |
142 | ||
c66ac9db | 143 | return 0; |
35e0e757 CH |
144 | |
145 | out_free_tg_pt_gp_mem_cache: | |
146 | kmem_cache_destroy(t10_alua_tg_pt_gp_mem_cache); | |
147 | out_free_tg_pt_gp_cache: | |
148 | kmem_cache_destroy(t10_alua_tg_pt_gp_cache); | |
149 | out_free_lu_gp_mem_cache: | |
150 | kmem_cache_destroy(t10_alua_lu_gp_mem_cache); | |
151 | out_free_lu_gp_cache: | |
152 | kmem_cache_destroy(t10_alua_lu_gp_cache); | |
153 | out_free_pr_reg_cache: | |
154 | kmem_cache_destroy(t10_pr_reg_cache); | |
155 | out_free_ua_cache: | |
156 | kmem_cache_destroy(se_ua_cache); | |
157 | out_free_sess_cache: | |
158 | kmem_cache_destroy(se_sess_cache); | |
c66ac9db | 159 | out: |
e3d6f909 | 160 | return -ENOMEM; |
c66ac9db NB |
161 | } |
162 | ||
e3d6f909 | 163 | void release_se_kmem_caches(void) |
c66ac9db | 164 | { |
35e0e757 | 165 | destroy_workqueue(target_completion_wq); |
c66ac9db NB |
166 | kmem_cache_destroy(se_sess_cache); |
167 | kmem_cache_destroy(se_ua_cache); | |
c66ac9db NB |
168 | kmem_cache_destroy(t10_pr_reg_cache); |
169 | kmem_cache_destroy(t10_alua_lu_gp_cache); | |
170 | kmem_cache_destroy(t10_alua_lu_gp_mem_cache); | |
171 | kmem_cache_destroy(t10_alua_tg_pt_gp_cache); | |
172 | kmem_cache_destroy(t10_alua_tg_pt_gp_mem_cache); | |
c66ac9db NB |
173 | } |
174 | ||
e3d6f909 AG |
175 | /* This code ensures unique mib indexes are handed out. */ |
176 | static DEFINE_SPINLOCK(scsi_mib_index_lock); | |
177 | static u32 scsi_mib_index[SCSI_INDEX_TYPE_MAX]; | |
e89d15ee NB |
178 | |
179 | /* | |
180 | * Allocate a new row index for the entry type specified | |
181 | */ | |
182 | u32 scsi_get_new_index(scsi_index_t type) | |
183 | { | |
184 | u32 new_index; | |
185 | ||
e3d6f909 | 186 | BUG_ON((type < 0) || (type >= SCSI_INDEX_TYPE_MAX)); |
e89d15ee | 187 | |
e3d6f909 AG |
188 | spin_lock(&scsi_mib_index_lock); |
189 | new_index = ++scsi_mib_index[type]; | |
190 | spin_unlock(&scsi_mib_index_lock); | |
e89d15ee NB |
191 | |
192 | return new_index; | |
193 | } | |
194 | ||
dbc5623e | 195 | void transport_subsystem_check_init(void) |
c66ac9db NB |
196 | { |
197 | int ret; | |
198 | ||
dbc5623e NB |
199 | if (sub_api_initialized) |
200 | return; | |
201 | ||
c66ac9db NB |
202 | ret = request_module("target_core_iblock"); |
203 | if (ret != 0) | |
6708bb27 | 204 | pr_err("Unable to load target_core_iblock\n"); |
c66ac9db NB |
205 | |
206 | ret = request_module("target_core_file"); | |
207 | if (ret != 0) | |
6708bb27 | 208 | pr_err("Unable to load target_core_file\n"); |
c66ac9db NB |
209 | |
210 | ret = request_module("target_core_pscsi"); | |
211 | if (ret != 0) | |
6708bb27 | 212 | pr_err("Unable to load target_core_pscsi\n"); |
c66ac9db NB |
213 | |
214 | ret = request_module("target_core_stgt"); | |
215 | if (ret != 0) | |
6708bb27 | 216 | pr_err("Unable to load target_core_stgt\n"); |
c66ac9db | 217 | |
e3d6f909 | 218 | sub_api_initialized = 1; |
dbc5623e | 219 | return; |
c66ac9db NB |
220 | } |
221 | ||
222 | struct se_session *transport_init_session(void) | |
223 | { | |
224 | struct se_session *se_sess; | |
225 | ||
226 | se_sess = kmem_cache_zalloc(se_sess_cache, GFP_KERNEL); | |
6708bb27 AG |
227 | if (!se_sess) { |
228 | pr_err("Unable to allocate struct se_session from" | |
c66ac9db NB |
229 | " se_sess_cache\n"); |
230 | return ERR_PTR(-ENOMEM); | |
231 | } | |
232 | INIT_LIST_HEAD(&se_sess->sess_list); | |
233 | INIT_LIST_HEAD(&se_sess->sess_acl_list); | |
a17f091d NB |
234 | INIT_LIST_HEAD(&se_sess->sess_cmd_list); |
235 | INIT_LIST_HEAD(&se_sess->sess_wait_list); | |
236 | spin_lock_init(&se_sess->sess_cmd_lock); | |
41ac82b6 | 237 | kref_init(&se_sess->sess_kref); |
c66ac9db NB |
238 | |
239 | return se_sess; | |
240 | } | |
241 | EXPORT_SYMBOL(transport_init_session); | |
242 | ||
243 | /* | |
140854cb | 244 | * Called with spin_lock_irqsave(&struct se_portal_group->session_lock called. |
c66ac9db NB |
245 | */ |
246 | void __transport_register_session( | |
247 | struct se_portal_group *se_tpg, | |
248 | struct se_node_acl *se_nacl, | |
249 | struct se_session *se_sess, | |
250 | void *fabric_sess_ptr) | |
251 | { | |
252 | unsigned char buf[PR_REG_ISID_LEN]; | |
253 | ||
254 | se_sess->se_tpg = se_tpg; | |
255 | se_sess->fabric_sess_ptr = fabric_sess_ptr; | |
256 | /* | |
257 | * Used by struct se_node_acl's under ConfigFS to locate active se_session-t | |
258 | * | |
259 | * Only set for struct se_session's that will actually be moving I/O. | |
260 | * eg: *NOT* discovery sessions. | |
261 | */ | |
262 | if (se_nacl) { | |
263 | /* | |
264 | * If the fabric module supports an ISID based TransportID, | |
265 | * save this value in binary from the fabric I_T Nexus now. | |
266 | */ | |
e3d6f909 | 267 | if (se_tpg->se_tpg_tfo->sess_get_initiator_sid != NULL) { |
c66ac9db | 268 | memset(&buf[0], 0, PR_REG_ISID_LEN); |
e3d6f909 | 269 | se_tpg->se_tpg_tfo->sess_get_initiator_sid(se_sess, |
c66ac9db NB |
270 | &buf[0], PR_REG_ISID_LEN); |
271 | se_sess->sess_bin_isid = get_unaligned_be64(&buf[0]); | |
272 | } | |
afb999ff NB |
273 | kref_get(&se_nacl->acl_kref); |
274 | ||
c66ac9db NB |
275 | spin_lock_irq(&se_nacl->nacl_sess_lock); |
276 | /* | |
277 | * The se_nacl->nacl_sess pointer will be set to the | |
278 | * last active I_T Nexus for each struct se_node_acl. | |
279 | */ | |
280 | se_nacl->nacl_sess = se_sess; | |
281 | ||
282 | list_add_tail(&se_sess->sess_acl_list, | |
283 | &se_nacl->acl_sess_list); | |
284 | spin_unlock_irq(&se_nacl->nacl_sess_lock); | |
285 | } | |
286 | list_add_tail(&se_sess->sess_list, &se_tpg->tpg_sess_list); | |
287 | ||
6708bb27 | 288 | pr_debug("TARGET_CORE[%s]: Registered fabric_sess_ptr: %p\n", |
e3d6f909 | 289 | se_tpg->se_tpg_tfo->get_fabric_name(), se_sess->fabric_sess_ptr); |
c66ac9db NB |
290 | } |
291 | EXPORT_SYMBOL(__transport_register_session); | |
292 | ||
293 | void transport_register_session( | |
294 | struct se_portal_group *se_tpg, | |
295 | struct se_node_acl *se_nacl, | |
296 | struct se_session *se_sess, | |
297 | void *fabric_sess_ptr) | |
298 | { | |
140854cb NB |
299 | unsigned long flags; |
300 | ||
301 | spin_lock_irqsave(&se_tpg->session_lock, flags); | |
c66ac9db | 302 | __transport_register_session(se_tpg, se_nacl, se_sess, fabric_sess_ptr); |
140854cb | 303 | spin_unlock_irqrestore(&se_tpg->session_lock, flags); |
c66ac9db NB |
304 | } |
305 | EXPORT_SYMBOL(transport_register_session); | |
306 | ||
4149268e | 307 | void target_release_session(struct kref *kref) |
41ac82b6 NB |
308 | { |
309 | struct se_session *se_sess = container_of(kref, | |
310 | struct se_session, sess_kref); | |
311 | struct se_portal_group *se_tpg = se_sess->se_tpg; | |
312 | ||
313 | se_tpg->se_tpg_tfo->close_session(se_sess); | |
314 | } | |
315 | ||
316 | void target_get_session(struct se_session *se_sess) | |
317 | { | |
318 | kref_get(&se_sess->sess_kref); | |
319 | } | |
320 | EXPORT_SYMBOL(target_get_session); | |
321 | ||
33933a0e | 322 | void target_put_session(struct se_session *se_sess) |
41ac82b6 | 323 | { |
4149268e JE |
324 | struct se_portal_group *tpg = se_sess->se_tpg; |
325 | ||
326 | if (tpg->se_tpg_tfo->put_session != NULL) { | |
327 | tpg->se_tpg_tfo->put_session(se_sess); | |
328 | return; | |
329 | } | |
33933a0e | 330 | kref_put(&se_sess->sess_kref, target_release_session); |
41ac82b6 NB |
331 | } |
332 | EXPORT_SYMBOL(target_put_session); | |
333 | ||
afb999ff NB |
334 | static void target_complete_nacl(struct kref *kref) |
335 | { | |
336 | struct se_node_acl *nacl = container_of(kref, | |
337 | struct se_node_acl, acl_kref); | |
338 | ||
339 | complete(&nacl->acl_free_comp); | |
340 | } | |
341 | ||
342 | void target_put_nacl(struct se_node_acl *nacl) | |
343 | { | |
344 | kref_put(&nacl->acl_kref, target_complete_nacl); | |
345 | } | |
346 | ||
c66ac9db NB |
347 | void transport_deregister_session_configfs(struct se_session *se_sess) |
348 | { | |
349 | struct se_node_acl *se_nacl; | |
23388864 | 350 | unsigned long flags; |
c66ac9db NB |
351 | /* |
352 | * Used by struct se_node_acl's under ConfigFS to locate active struct se_session | |
353 | */ | |
354 | se_nacl = se_sess->se_node_acl; | |
6708bb27 | 355 | if (se_nacl) { |
23388864 | 356 | spin_lock_irqsave(&se_nacl->nacl_sess_lock, flags); |
337c0607 NB |
357 | if (se_nacl->acl_stop == 0) |
358 | list_del(&se_sess->sess_acl_list); | |
c66ac9db NB |
359 | /* |
360 | * If the session list is empty, then clear the pointer. | |
361 | * Otherwise, set the struct se_session pointer from the tail | |
362 | * element of the per struct se_node_acl active session list. | |
363 | */ | |
364 | if (list_empty(&se_nacl->acl_sess_list)) | |
365 | se_nacl->nacl_sess = NULL; | |
366 | else { | |
367 | se_nacl->nacl_sess = container_of( | |
368 | se_nacl->acl_sess_list.prev, | |
369 | struct se_session, sess_acl_list); | |
370 | } | |
23388864 | 371 | spin_unlock_irqrestore(&se_nacl->nacl_sess_lock, flags); |
c66ac9db NB |
372 | } |
373 | } | |
374 | EXPORT_SYMBOL(transport_deregister_session_configfs); | |
375 | ||
376 | void transport_free_session(struct se_session *se_sess) | |
377 | { | |
378 | kmem_cache_free(se_sess_cache, se_sess); | |
379 | } | |
380 | EXPORT_SYMBOL(transport_free_session); | |
381 | ||
382 | void transport_deregister_session(struct se_session *se_sess) | |
383 | { | |
384 | struct se_portal_group *se_tpg = se_sess->se_tpg; | |
01468346 | 385 | struct target_core_fabric_ops *se_tfo; |
c66ac9db | 386 | struct se_node_acl *se_nacl; |
e63a8e19 | 387 | unsigned long flags; |
01468346 | 388 | bool comp_nacl = true; |
c66ac9db | 389 | |
6708bb27 | 390 | if (!se_tpg) { |
c66ac9db NB |
391 | transport_free_session(se_sess); |
392 | return; | |
393 | } | |
01468346 | 394 | se_tfo = se_tpg->se_tpg_tfo; |
c66ac9db | 395 | |
e63a8e19 | 396 | spin_lock_irqsave(&se_tpg->session_lock, flags); |
c66ac9db NB |
397 | list_del(&se_sess->sess_list); |
398 | se_sess->se_tpg = NULL; | |
399 | se_sess->fabric_sess_ptr = NULL; | |
e63a8e19 | 400 | spin_unlock_irqrestore(&se_tpg->session_lock, flags); |
c66ac9db NB |
401 | |
402 | /* | |
403 | * Determine if we need to do extra work for this initiator node's | |
404 | * struct se_node_acl if it had been previously dynamically generated. | |
405 | */ | |
406 | se_nacl = se_sess->se_node_acl; | |
01468346 NB |
407 | |
408 | spin_lock_irqsave(&se_tpg->acl_node_lock, flags); | |
409 | if (se_nacl && se_nacl->dynamic_node_acl) { | |
410 | if (!se_tfo->tpg_check_demo_mode_cache(se_tpg)) { | |
411 | list_del(&se_nacl->acl_list); | |
412 | se_tpg->num_node_acls--; | |
413 | spin_unlock_irqrestore(&se_tpg->acl_node_lock, flags); | |
414 | core_tpg_wait_for_nacl_pr_ref(se_nacl); | |
415 | core_free_device_list_for_node(se_nacl, se_tpg); | |
416 | se_tfo->tpg_release_fabric_acl(se_tpg, se_nacl); | |
417 | ||
418 | comp_nacl = false; | |
419 | spin_lock_irqsave(&se_tpg->acl_node_lock, flags); | |
c66ac9db | 420 | } |
c66ac9db | 421 | } |
01468346 | 422 | spin_unlock_irqrestore(&se_tpg->acl_node_lock, flags); |
c66ac9db | 423 | |
6708bb27 | 424 | pr_debug("TARGET_CORE[%s]: Deregistered fabric_sess\n", |
e3d6f909 | 425 | se_tpg->se_tpg_tfo->get_fabric_name()); |
01468346 | 426 | /* |
afb999ff NB |
427 | * If last kref is dropping now for an explict NodeACL, awake sleeping |
428 | * ->acl_free_comp caller to wakeup configfs se_node_acl->acl_group | |
429 | * removal context. | |
01468346 NB |
430 | */ |
431 | if (se_nacl && comp_nacl == true) | |
afb999ff | 432 | target_put_nacl(se_nacl); |
01468346 | 433 | |
afb999ff | 434 | transport_free_session(se_sess); |
c66ac9db NB |
435 | } |
436 | EXPORT_SYMBOL(transport_deregister_session); | |
437 | ||
438 | /* | |
a1d8b49a | 439 | * Called with cmd->t_state_lock held. |
c66ac9db | 440 | */ |
cf572a96 | 441 | static void target_remove_from_state_list(struct se_cmd *cmd) |
c66ac9db | 442 | { |
42bf829e | 443 | struct se_device *dev = cmd->se_dev; |
c66ac9db NB |
444 | unsigned long flags; |
445 | ||
42bf829e CH |
446 | if (!dev) |
447 | return; | |
c66ac9db | 448 | |
cf572a96 CH |
449 | if (cmd->transport_state & CMD_T_BUSY) |
450 | return; | |
c66ac9db | 451 | |
cf572a96 CH |
452 | spin_lock_irqsave(&dev->execute_task_lock, flags); |
453 | if (cmd->state_active) { | |
454 | list_del(&cmd->state_list); | |
cf572a96 | 455 | cmd->state_active = false; |
c66ac9db | 456 | } |
cf572a96 | 457 | spin_unlock_irqrestore(&dev->execute_task_lock, flags); |
c66ac9db NB |
458 | } |
459 | ||
f7113a47 | 460 | static int transport_cmd_check_stop(struct se_cmd *cmd, bool remove_from_lists) |
c66ac9db NB |
461 | { |
462 | unsigned long flags; | |
463 | ||
a1d8b49a | 464 | spin_lock_irqsave(&cmd->t_state_lock, flags); |
c66ac9db NB |
465 | /* |
466 | * Determine if IOCTL context caller in requesting the stopping of this | |
467 | * command for LUN shutdown purposes. | |
468 | */ | |
7d680f3b CH |
469 | if (cmd->transport_state & CMD_T_LUN_STOP) { |
470 | pr_debug("%s:%d CMD_T_LUN_STOP for ITT: 0x%08x\n", | |
471 | __func__, __LINE__, cmd->se_tfo->get_task_tag(cmd)); | |
c66ac9db | 472 | |
7d680f3b | 473 | cmd->transport_state &= ~CMD_T_ACTIVE; |
f7113a47 | 474 | if (remove_from_lists) |
cf572a96 | 475 | target_remove_from_state_list(cmd); |
a1d8b49a | 476 | spin_unlock_irqrestore(&cmd->t_state_lock, flags); |
c66ac9db | 477 | |
a1d8b49a | 478 | complete(&cmd->transport_lun_stop_comp); |
c66ac9db NB |
479 | return 1; |
480 | } | |
f7113a47 CH |
481 | |
482 | if (remove_from_lists) { | |
483 | target_remove_from_state_list(cmd); | |
484 | ||
485 | /* | |
486 | * Clear struct se_cmd->se_lun before the handoff to FE. | |
487 | */ | |
488 | cmd->se_lun = NULL; | |
489 | } | |
490 | ||
c66ac9db NB |
491 | /* |
492 | * Determine if frontend context caller is requesting the stopping of | |
e3d6f909 | 493 | * this command for frontend exceptions. |
c66ac9db | 494 | */ |
7d680f3b CH |
495 | if (cmd->transport_state & CMD_T_STOP) { |
496 | pr_debug("%s:%d CMD_T_STOP for ITT: 0x%08x\n", | |
497 | __func__, __LINE__, | |
e3d6f909 | 498 | cmd->se_tfo->get_task_tag(cmd)); |
c66ac9db | 499 | |
a1d8b49a | 500 | spin_unlock_irqrestore(&cmd->t_state_lock, flags); |
c66ac9db | 501 | |
a1d8b49a | 502 | complete(&cmd->t_transport_stop_comp); |
c66ac9db NB |
503 | return 1; |
504 | } | |
f7113a47 CH |
505 | |
506 | cmd->transport_state &= ~CMD_T_ACTIVE; | |
507 | if (remove_from_lists) { | |
508 | /* | |
509 | * Some fabric modules like tcm_loop can release | |
510 | * their internally allocated I/O reference now and | |
511 | * struct se_cmd now. | |
512 | * | |
513 | * Fabric modules are expected to return '1' here if the | |
514 | * se_cmd being passed is released at this point, | |
515 | * or zero if not being released. | |
516 | */ | |
517 | if (cmd->se_tfo->check_stop_free != NULL) { | |
518 | spin_unlock_irqrestore(&cmd->t_state_lock, flags); | |
519 | return cmd->se_tfo->check_stop_free(cmd); | |
c66ac9db | 520 | } |
f7113a47 | 521 | } |
c66ac9db | 522 | |
a1d8b49a | 523 | spin_unlock_irqrestore(&cmd->t_state_lock, flags); |
c66ac9db NB |
524 | return 0; |
525 | } | |
526 | ||
527 | static int transport_cmd_check_stop_to_fabric(struct se_cmd *cmd) | |
528 | { | |
f7113a47 | 529 | return transport_cmd_check_stop(cmd, true); |
c66ac9db NB |
530 | } |
531 | ||
532 | static void transport_lun_remove_cmd(struct se_cmd *cmd) | |
533 | { | |
e3d6f909 | 534 | struct se_lun *lun = cmd->se_lun; |
c66ac9db NB |
535 | unsigned long flags; |
536 | ||
537 | if (!lun) | |
538 | return; | |
539 | ||
a1d8b49a | 540 | spin_lock_irqsave(&cmd->t_state_lock, flags); |
7d680f3b CH |
541 | if (cmd->transport_state & CMD_T_DEV_ACTIVE) { |
542 | cmd->transport_state &= ~CMD_T_DEV_ACTIVE; | |
cf572a96 | 543 | target_remove_from_state_list(cmd); |
c66ac9db | 544 | } |
a1d8b49a | 545 | spin_unlock_irqrestore(&cmd->t_state_lock, flags); |
c66ac9db | 546 | |
c66ac9db | 547 | spin_lock_irqsave(&lun->lun_cmd_lock, flags); |
3d26fea0 CH |
548 | if (!list_empty(&cmd->se_lun_node)) |
549 | list_del_init(&cmd->se_lun_node); | |
c66ac9db NB |
550 | spin_unlock_irqrestore(&lun->lun_cmd_lock, flags); |
551 | } | |
552 | ||
553 | void transport_cmd_finish_abort(struct se_cmd *cmd, int remove) | |
554 | { | |
c8e31f26 | 555 | if (!(cmd->se_cmd_flags & SCF_SCSI_TMR_CDB)) |
8dc52b54 | 556 | transport_lun_remove_cmd(cmd); |
c66ac9db NB |
557 | |
558 | if (transport_cmd_check_stop_to_fabric(cmd)) | |
559 | return; | |
af877292 | 560 | if (remove) |
e6a2573f | 561 | transport_put_cmd(cmd); |
c66ac9db NB |
562 | } |
563 | ||
35e0e757 CH |
564 | static void target_complete_failure_work(struct work_struct *work) |
565 | { | |
566 | struct se_cmd *cmd = container_of(work, struct se_cmd, work); | |
567 | ||
03e98c9e | 568 | transport_generic_request_failure(cmd); |
35e0e757 CH |
569 | } |
570 | ||
5787cacd | 571 | void target_complete_cmd(struct se_cmd *cmd, u8 scsi_status) |
c66ac9db | 572 | { |
42bf829e | 573 | struct se_device *dev = cmd->se_dev; |
5787cacd | 574 | int success = scsi_status == GOOD; |
c66ac9db | 575 | unsigned long flags; |
c66ac9db | 576 | |
5787cacd CH |
577 | cmd->scsi_status = scsi_status; |
578 | ||
579 | ||
a1d8b49a | 580 | spin_lock_irqsave(&cmd->t_state_lock, flags); |
cf572a96 | 581 | cmd->transport_state &= ~CMD_T_BUSY; |
c66ac9db | 582 | |
c66ac9db | 583 | if (dev && dev->transport->transport_complete) { |
5787cacd CH |
584 | if (dev->transport->transport_complete(cmd, |
585 | cmd->t_data_sg) != 0) { | |
c66ac9db | 586 | cmd->se_cmd_flags |= SCF_TRANSPORT_TASK_SENSE; |
c66ac9db NB |
587 | success = 1; |
588 | } | |
589 | } | |
590 | ||
591 | /* | |
5787cacd | 592 | * See if we are waiting to complete for an exception condition. |
c66ac9db | 593 | */ |
cf572a96 | 594 | if (cmd->transport_state & CMD_T_REQUEST_STOP) { |
a1d8b49a | 595 | spin_unlock_irqrestore(&cmd->t_state_lock, flags); |
cf572a96 | 596 | complete(&cmd->task_stop_comp); |
c66ac9db NB |
597 | return; |
598 | } | |
2235007c CH |
599 | |
600 | if (!success) | |
7d680f3b | 601 | cmd->transport_state |= CMD_T_FAILED; |
2235007c | 602 | |
3d28934a NB |
603 | /* |
604 | * Check for case where an explict ABORT_TASK has been received | |
605 | * and transport_wait_for_tasks() will be waiting for completion.. | |
606 | */ | |
607 | if (cmd->transport_state & CMD_T_ABORTED && | |
608 | cmd->transport_state & CMD_T_STOP) { | |
609 | spin_unlock_irqrestore(&cmd->t_state_lock, flags); | |
610 | complete(&cmd->t_transport_stop_comp); | |
611 | return; | |
612 | } else if (cmd->transport_state & CMD_T_FAILED) { | |
41e16e98 | 613 | cmd->scsi_sense_reason = TCM_LOGICAL_UNIT_COMMUNICATION_FAILURE; |
35e0e757 | 614 | INIT_WORK(&cmd->work, target_complete_failure_work); |
c66ac9db | 615 | } else { |
35e0e757 | 616 | INIT_WORK(&cmd->work, target_complete_ok_work); |
c66ac9db | 617 | } |
35e0e757 | 618 | |
35e0e757 | 619 | cmd->t_state = TRANSPORT_COMPLETE; |
3d28934a | 620 | cmd->transport_state |= (CMD_T_COMPLETE | CMD_T_ACTIVE); |
a1d8b49a | 621 | spin_unlock_irqrestore(&cmd->t_state_lock, flags); |
c66ac9db | 622 | |
35e0e757 | 623 | queue_work(target_completion_wq, &cmd->work); |
c66ac9db | 624 | } |
6bb35e00 CH |
625 | EXPORT_SYMBOL(target_complete_cmd); |
626 | ||
cf572a96 | 627 | static void target_add_to_state_list(struct se_cmd *cmd) |
c66ac9db | 628 | { |
cf572a96 CH |
629 | struct se_device *dev = cmd->se_dev; |
630 | unsigned long flags; | |
c66ac9db | 631 | |
cf572a96 CH |
632 | spin_lock_irqsave(&dev->execute_task_lock, flags); |
633 | if (!cmd->state_active) { | |
634 | list_add_tail(&cmd->state_list, &dev->state_list); | |
635 | cmd->state_active = true; | |
c66ac9db | 636 | } |
cf572a96 | 637 | spin_unlock_irqrestore(&dev->execute_task_lock, flags); |
c66ac9db NB |
638 | } |
639 | ||
07bde79a | 640 | /* |
f147abb4 | 641 | * Handle QUEUE_FULL / -EAGAIN and -ENOMEM status |
07bde79a | 642 | */ |
7a6f0a1e CH |
643 | static void transport_write_pending_qf(struct se_cmd *cmd); |
644 | static void transport_complete_qf(struct se_cmd *cmd); | |
07bde79a NB |
645 | |
646 | static void target_qf_do_work(struct work_struct *work) | |
647 | { | |
648 | struct se_device *dev = container_of(work, struct se_device, | |
649 | qf_work_queue); | |
bcac364a | 650 | LIST_HEAD(qf_cmd_list); |
07bde79a NB |
651 | struct se_cmd *cmd, *cmd_tmp; |
652 | ||
653 | spin_lock_irq(&dev->qf_cmd_lock); | |
bcac364a RD |
654 | list_splice_init(&dev->qf_cmd_list, &qf_cmd_list); |
655 | spin_unlock_irq(&dev->qf_cmd_lock); | |
07bde79a | 656 | |
bcac364a | 657 | list_for_each_entry_safe(cmd, cmd_tmp, &qf_cmd_list, se_qf_node) { |
07bde79a NB |
658 | list_del(&cmd->se_qf_node); |
659 | atomic_dec(&dev->dev_qf_count); | |
660 | smp_mb__after_atomic_dec(); | |
07bde79a | 661 | |
6708bb27 | 662 | pr_debug("Processing %s cmd: %p QUEUE_FULL in work queue" |
07bde79a | 663 | " context: %s\n", cmd->se_tfo->get_fabric_name(), cmd, |
e057f533 | 664 | (cmd->t_state == TRANSPORT_COMPLETE_QF_OK) ? "COMPLETE_OK" : |
07bde79a NB |
665 | (cmd->t_state == TRANSPORT_COMPLETE_QF_WP) ? "WRITE_PENDING" |
666 | : "UNKNOWN"); | |
f7a5cc0b | 667 | |
7a6f0a1e CH |
668 | if (cmd->t_state == TRANSPORT_COMPLETE_QF_WP) |
669 | transport_write_pending_qf(cmd); | |
670 | else if (cmd->t_state == TRANSPORT_COMPLETE_QF_OK) | |
671 | transport_complete_qf(cmd); | |
07bde79a | 672 | } |
07bde79a NB |
673 | } |
674 | ||
c66ac9db NB |
675 | unsigned char *transport_dump_cmd_direction(struct se_cmd *cmd) |
676 | { | |
677 | switch (cmd->data_direction) { | |
678 | case DMA_NONE: | |
679 | return "NONE"; | |
680 | case DMA_FROM_DEVICE: | |
681 | return "READ"; | |
682 | case DMA_TO_DEVICE: | |
683 | return "WRITE"; | |
684 | case DMA_BIDIRECTIONAL: | |
685 | return "BIDI"; | |
686 | default: | |
687 | break; | |
688 | } | |
689 | ||
690 | return "UNKNOWN"; | |
691 | } | |
692 | ||
693 | void transport_dump_dev_state( | |
694 | struct se_device *dev, | |
695 | char *b, | |
696 | int *bl) | |
697 | { | |
698 | *bl += sprintf(b + *bl, "Status: "); | |
699 | switch (dev->dev_status) { | |
700 | case TRANSPORT_DEVICE_ACTIVATED: | |
701 | *bl += sprintf(b + *bl, "ACTIVATED"); | |
702 | break; | |
703 | case TRANSPORT_DEVICE_DEACTIVATED: | |
704 | *bl += sprintf(b + *bl, "DEACTIVATED"); | |
705 | break; | |
706 | case TRANSPORT_DEVICE_SHUTDOWN: | |
707 | *bl += sprintf(b + *bl, "SHUTDOWN"); | |
708 | break; | |
709 | case TRANSPORT_DEVICE_OFFLINE_ACTIVATED: | |
710 | case TRANSPORT_DEVICE_OFFLINE_DEACTIVATED: | |
711 | *bl += sprintf(b + *bl, "OFFLINE"); | |
712 | break; | |
713 | default: | |
714 | *bl += sprintf(b + *bl, "UNKNOWN=%d", dev->dev_status); | |
715 | break; | |
716 | } | |
717 | ||
5f41a31d | 718 | *bl += sprintf(b + *bl, " Max Queue Depth: %d", dev->queue_depth); |
11e764bd NB |
719 | *bl += sprintf(b + *bl, " SectorSize: %u HwMaxSectors: %u\n", |
720 | dev->se_sub_dev->se_dev_attrib.block_size, | |
721 | dev->se_sub_dev->se_dev_attrib.hw_max_sectors); | |
c66ac9db NB |
722 | *bl += sprintf(b + *bl, " "); |
723 | } | |
724 | ||
c66ac9db NB |
725 | void transport_dump_vpd_proto_id( |
726 | struct t10_vpd *vpd, | |
727 | unsigned char *p_buf, | |
728 | int p_buf_len) | |
729 | { | |
730 | unsigned char buf[VPD_TMP_BUF_SIZE]; | |
731 | int len; | |
732 | ||
733 | memset(buf, 0, VPD_TMP_BUF_SIZE); | |
734 | len = sprintf(buf, "T10 VPD Protocol Identifier: "); | |
735 | ||
736 | switch (vpd->protocol_identifier) { | |
737 | case 0x00: | |
738 | sprintf(buf+len, "Fibre Channel\n"); | |
739 | break; | |
740 | case 0x10: | |
741 | sprintf(buf+len, "Parallel SCSI\n"); | |
742 | break; | |
743 | case 0x20: | |
744 | sprintf(buf+len, "SSA\n"); | |
745 | break; | |
746 | case 0x30: | |
747 | sprintf(buf+len, "IEEE 1394\n"); | |
748 | break; | |
749 | case 0x40: | |
750 | sprintf(buf+len, "SCSI Remote Direct Memory Access" | |
751 | " Protocol\n"); | |
752 | break; | |
753 | case 0x50: | |
754 | sprintf(buf+len, "Internet SCSI (iSCSI)\n"); | |
755 | break; | |
756 | case 0x60: | |
757 | sprintf(buf+len, "SAS Serial SCSI Protocol\n"); | |
758 | break; | |
759 | case 0x70: | |
760 | sprintf(buf+len, "Automation/Drive Interface Transport" | |
761 | " Protocol\n"); | |
762 | break; | |
763 | case 0x80: | |
764 | sprintf(buf+len, "AT Attachment Interface ATA/ATAPI\n"); | |
765 | break; | |
766 | default: | |
767 | sprintf(buf+len, "Unknown 0x%02x\n", | |
768 | vpd->protocol_identifier); | |
769 | break; | |
770 | } | |
771 | ||
772 | if (p_buf) | |
773 | strncpy(p_buf, buf, p_buf_len); | |
774 | else | |
6708bb27 | 775 | pr_debug("%s", buf); |
c66ac9db NB |
776 | } |
777 | ||
778 | void | |
779 | transport_set_vpd_proto_id(struct t10_vpd *vpd, unsigned char *page_83) | |
780 | { | |
781 | /* | |
782 | * Check if the Protocol Identifier Valid (PIV) bit is set.. | |
783 | * | |
784 | * from spc3r23.pdf section 7.5.1 | |
785 | */ | |
786 | if (page_83[1] & 0x80) { | |
787 | vpd->protocol_identifier = (page_83[0] & 0xf0); | |
788 | vpd->protocol_identifier_set = 1; | |
789 | transport_dump_vpd_proto_id(vpd, NULL, 0); | |
790 | } | |
791 | } | |
792 | EXPORT_SYMBOL(transport_set_vpd_proto_id); | |
793 | ||
794 | int transport_dump_vpd_assoc( | |
795 | struct t10_vpd *vpd, | |
796 | unsigned char *p_buf, | |
797 | int p_buf_len) | |
798 | { | |
799 | unsigned char buf[VPD_TMP_BUF_SIZE]; | |
e3d6f909 AG |
800 | int ret = 0; |
801 | int len; | |
c66ac9db NB |
802 | |
803 | memset(buf, 0, VPD_TMP_BUF_SIZE); | |
804 | len = sprintf(buf, "T10 VPD Identifier Association: "); | |
805 | ||
806 | switch (vpd->association) { | |
807 | case 0x00: | |
808 | sprintf(buf+len, "addressed logical unit\n"); | |
809 | break; | |
810 | case 0x10: | |
811 | sprintf(buf+len, "target port\n"); | |
812 | break; | |
813 | case 0x20: | |
814 | sprintf(buf+len, "SCSI target device\n"); | |
815 | break; | |
816 | default: | |
817 | sprintf(buf+len, "Unknown 0x%02x\n", vpd->association); | |
e3d6f909 | 818 | ret = -EINVAL; |
c66ac9db NB |
819 | break; |
820 | } | |
821 | ||
822 | if (p_buf) | |
823 | strncpy(p_buf, buf, p_buf_len); | |
824 | else | |
6708bb27 | 825 | pr_debug("%s", buf); |
c66ac9db NB |
826 | |
827 | return ret; | |
828 | } | |
829 | ||
830 | int transport_set_vpd_assoc(struct t10_vpd *vpd, unsigned char *page_83) | |
831 | { | |
832 | /* | |
833 | * The VPD identification association.. | |
834 | * | |
835 | * from spc3r23.pdf Section 7.6.3.1 Table 297 | |
836 | */ | |
837 | vpd->association = (page_83[1] & 0x30); | |
838 | return transport_dump_vpd_assoc(vpd, NULL, 0); | |
839 | } | |
840 | EXPORT_SYMBOL(transport_set_vpd_assoc); | |
841 | ||
842 | int transport_dump_vpd_ident_type( | |
843 | struct t10_vpd *vpd, | |
844 | unsigned char *p_buf, | |
845 | int p_buf_len) | |
846 | { | |
847 | unsigned char buf[VPD_TMP_BUF_SIZE]; | |
e3d6f909 AG |
848 | int ret = 0; |
849 | int len; | |
c66ac9db NB |
850 | |
851 | memset(buf, 0, VPD_TMP_BUF_SIZE); | |
852 | len = sprintf(buf, "T10 VPD Identifier Type: "); | |
853 | ||
854 | switch (vpd->device_identifier_type) { | |
855 | case 0x00: | |
856 | sprintf(buf+len, "Vendor specific\n"); | |
857 | break; | |
858 | case 0x01: | |
859 | sprintf(buf+len, "T10 Vendor ID based\n"); | |
860 | break; | |
861 | case 0x02: | |
862 | sprintf(buf+len, "EUI-64 based\n"); | |
863 | break; | |
864 | case 0x03: | |
865 | sprintf(buf+len, "NAA\n"); | |
866 | break; | |
867 | case 0x04: | |
868 | sprintf(buf+len, "Relative target port identifier\n"); | |
869 | break; | |
870 | case 0x08: | |
871 | sprintf(buf+len, "SCSI name string\n"); | |
872 | break; | |
873 | default: | |
874 | sprintf(buf+len, "Unsupported: 0x%02x\n", | |
875 | vpd->device_identifier_type); | |
e3d6f909 | 876 | ret = -EINVAL; |
c66ac9db NB |
877 | break; |
878 | } | |
879 | ||
e3d6f909 AG |
880 | if (p_buf) { |
881 | if (p_buf_len < strlen(buf)+1) | |
882 | return -EINVAL; | |
c66ac9db | 883 | strncpy(p_buf, buf, p_buf_len); |
e3d6f909 | 884 | } else { |
6708bb27 | 885 | pr_debug("%s", buf); |
e3d6f909 | 886 | } |
c66ac9db NB |
887 | |
888 | return ret; | |
889 | } | |
890 | ||
891 | int transport_set_vpd_ident_type(struct t10_vpd *vpd, unsigned char *page_83) | |
892 | { | |
893 | /* | |
894 | * The VPD identifier type.. | |
895 | * | |
896 | * from spc3r23.pdf Section 7.6.3.1 Table 298 | |
897 | */ | |
898 | vpd->device_identifier_type = (page_83[1] & 0x0f); | |
899 | return transport_dump_vpd_ident_type(vpd, NULL, 0); | |
900 | } | |
901 | EXPORT_SYMBOL(transport_set_vpd_ident_type); | |
902 | ||
903 | int transport_dump_vpd_ident( | |
904 | struct t10_vpd *vpd, | |
905 | unsigned char *p_buf, | |
906 | int p_buf_len) | |
907 | { | |
908 | unsigned char buf[VPD_TMP_BUF_SIZE]; | |
909 | int ret = 0; | |
910 | ||
911 | memset(buf, 0, VPD_TMP_BUF_SIZE); | |
912 | ||
913 | switch (vpd->device_identifier_code_set) { | |
914 | case 0x01: /* Binary */ | |
915 | sprintf(buf, "T10 VPD Binary Device Identifier: %s\n", | |
916 | &vpd->device_identifier[0]); | |
917 | break; | |
918 | case 0x02: /* ASCII */ | |
919 | sprintf(buf, "T10 VPD ASCII Device Identifier: %s\n", | |
920 | &vpd->device_identifier[0]); | |
921 | break; | |
922 | case 0x03: /* UTF-8 */ | |
923 | sprintf(buf, "T10 VPD UTF-8 Device Identifier: %s\n", | |
924 | &vpd->device_identifier[0]); | |
925 | break; | |
926 | default: | |
927 | sprintf(buf, "T10 VPD Device Identifier encoding unsupported:" | |
928 | " 0x%02x", vpd->device_identifier_code_set); | |
e3d6f909 | 929 | ret = -EINVAL; |
c66ac9db NB |
930 | break; |
931 | } | |
932 | ||
933 | if (p_buf) | |
934 | strncpy(p_buf, buf, p_buf_len); | |
935 | else | |
6708bb27 | 936 | pr_debug("%s", buf); |
c66ac9db NB |
937 | |
938 | return ret; | |
939 | } | |
940 | ||
941 | int | |
942 | transport_set_vpd_ident(struct t10_vpd *vpd, unsigned char *page_83) | |
943 | { | |
944 | static const char hex_str[] = "0123456789abcdef"; | |
945 | int j = 0, i = 4; /* offset to start of the identifer */ | |
946 | ||
947 | /* | |
948 | * The VPD Code Set (encoding) | |
949 | * | |
950 | * from spc3r23.pdf Section 7.6.3.1 Table 296 | |
951 | */ | |
952 | vpd->device_identifier_code_set = (page_83[0] & 0x0f); | |
953 | switch (vpd->device_identifier_code_set) { | |
954 | case 0x01: /* Binary */ | |
955 | vpd->device_identifier[j++] = | |
956 | hex_str[vpd->device_identifier_type]; | |
957 | while (i < (4 + page_83[3])) { | |
958 | vpd->device_identifier[j++] = | |
959 | hex_str[(page_83[i] & 0xf0) >> 4]; | |
960 | vpd->device_identifier[j++] = | |
961 | hex_str[page_83[i] & 0x0f]; | |
962 | i++; | |
963 | } | |
964 | break; | |
965 | case 0x02: /* ASCII */ | |
966 | case 0x03: /* UTF-8 */ | |
967 | while (i < (4 + page_83[3])) | |
968 | vpd->device_identifier[j++] = page_83[i++]; | |
969 | break; | |
970 | default: | |
971 | break; | |
972 | } | |
973 | ||
974 | return transport_dump_vpd_ident(vpd, NULL, 0); | |
975 | } | |
976 | EXPORT_SYMBOL(transport_set_vpd_ident); | |
977 | ||
978 | static void core_setup_task_attr_emulation(struct se_device *dev) | |
979 | { | |
980 | /* | |
981 | * If this device is from Target_Core_Mod/pSCSI, disable the | |
982 | * SAM Task Attribute emulation. | |
983 | * | |
984 | * This is currently not available in upsream Linux/SCSI Target | |
985 | * mode code, and is assumed to be disabled while using TCM/pSCSI. | |
986 | */ | |
e3d6f909 | 987 | if (dev->transport->transport_type == TRANSPORT_PLUGIN_PHBA_PDEV) { |
c66ac9db NB |
988 | dev->dev_task_attr_type = SAM_TASK_ATTR_PASSTHROUGH; |
989 | return; | |
990 | } | |
991 | ||
992 | dev->dev_task_attr_type = SAM_TASK_ATTR_EMULATED; | |
6708bb27 | 993 | pr_debug("%s: Using SAM_TASK_ATTR_EMULATED for SPC: 0x%02x" |
e3d6f909 AG |
994 | " device\n", dev->transport->name, |
995 | dev->transport->get_device_rev(dev)); | |
c66ac9db NB |
996 | } |
997 | ||
998 | static void scsi_dump_inquiry(struct se_device *dev) | |
999 | { | |
e3d6f909 | 1000 | struct t10_wwn *wwn = &dev->se_sub_dev->t10_wwn; |
e59a41b6 | 1001 | char buf[17]; |
c66ac9db NB |
1002 | int i, device_type; |
1003 | /* | |
1004 | * Print Linux/SCSI style INQUIRY formatting to the kernel ring buffer | |
1005 | */ | |
c66ac9db NB |
1006 | for (i = 0; i < 8; i++) |
1007 | if (wwn->vendor[i] >= 0x20) | |
e59a41b6 | 1008 | buf[i] = wwn->vendor[i]; |
c66ac9db | 1009 | else |
e59a41b6 SAS |
1010 | buf[i] = ' '; |
1011 | buf[i] = '\0'; | |
1012 | pr_debug(" Vendor: %s\n", buf); | |
c66ac9db | 1013 | |
c66ac9db NB |
1014 | for (i = 0; i < 16; i++) |
1015 | if (wwn->model[i] >= 0x20) | |
e59a41b6 | 1016 | buf[i] = wwn->model[i]; |
c66ac9db | 1017 | else |
e59a41b6 SAS |
1018 | buf[i] = ' '; |
1019 | buf[i] = '\0'; | |
1020 | pr_debug(" Model: %s\n", buf); | |
c66ac9db | 1021 | |
c66ac9db NB |
1022 | for (i = 0; i < 4; i++) |
1023 | if (wwn->revision[i] >= 0x20) | |
e59a41b6 | 1024 | buf[i] = wwn->revision[i]; |
c66ac9db | 1025 | else |
e59a41b6 SAS |
1026 | buf[i] = ' '; |
1027 | buf[i] = '\0'; | |
1028 | pr_debug(" Revision: %s\n", buf); | |
c66ac9db | 1029 | |
e3d6f909 | 1030 | device_type = dev->transport->get_device_type(dev); |
6708bb27 AG |
1031 | pr_debug(" Type: %s ", scsi_device_type(device_type)); |
1032 | pr_debug(" ANSI SCSI revision: %02x\n", | |
e3d6f909 | 1033 | dev->transport->get_device_rev(dev)); |
c66ac9db NB |
1034 | } |
1035 | ||
1036 | struct se_device *transport_add_device_to_core_hba( | |
1037 | struct se_hba *hba, | |
1038 | struct se_subsystem_api *transport, | |
1039 | struct se_subsystem_dev *se_dev, | |
1040 | u32 device_flags, | |
1041 | void *transport_dev, | |
1042 | struct se_dev_limits *dev_limits, | |
1043 | const char *inquiry_prod, | |
1044 | const char *inquiry_rev) | |
1045 | { | |
12a18bdc | 1046 | int force_pt; |
c66ac9db NB |
1047 | struct se_device *dev; |
1048 | ||
1049 | dev = kzalloc(sizeof(struct se_device), GFP_KERNEL); | |
6708bb27 AG |
1050 | if (!dev) { |
1051 | pr_err("Unable to allocate memory for se_dev_t\n"); | |
c66ac9db NB |
1052 | return NULL; |
1053 | } | |
c66ac9db NB |
1054 | |
1055 | dev->dev_flags = device_flags; | |
1056 | dev->dev_status |= TRANSPORT_DEVICE_DEACTIVATED; | |
5951146d | 1057 | dev->dev_ptr = transport_dev; |
c66ac9db NB |
1058 | dev->se_hba = hba; |
1059 | dev->se_sub_dev = se_dev; | |
1060 | dev->transport = transport; | |
c66ac9db NB |
1061 | INIT_LIST_HEAD(&dev->dev_list); |
1062 | INIT_LIST_HEAD(&dev->dev_sep_list); | |
1063 | INIT_LIST_HEAD(&dev->dev_tmr_list); | |
c66ac9db | 1064 | INIT_LIST_HEAD(&dev->delayed_cmd_list); |
cf572a96 | 1065 | INIT_LIST_HEAD(&dev->state_list); |
07bde79a | 1066 | INIT_LIST_HEAD(&dev->qf_cmd_list); |
c66ac9db NB |
1067 | spin_lock_init(&dev->execute_task_lock); |
1068 | spin_lock_init(&dev->delayed_cmd_lock); | |
c66ac9db NB |
1069 | spin_lock_init(&dev->dev_reservation_lock); |
1070 | spin_lock_init(&dev->dev_status_lock); | |
c66ac9db NB |
1071 | spin_lock_init(&dev->se_port_lock); |
1072 | spin_lock_init(&dev->se_tmr_lock); | |
07bde79a | 1073 | spin_lock_init(&dev->qf_cmd_lock); |
c66ac9db NB |
1074 | atomic_set(&dev->dev_ordered_id, 0); |
1075 | ||
1076 | se_dev_set_default_attribs(dev, dev_limits); | |
1077 | ||
1078 | dev->dev_index = scsi_get_new_index(SCSI_DEVICE_INDEX); | |
1079 | dev->creation_time = get_jiffies_64(); | |
1080 | spin_lock_init(&dev->stats_lock); | |
1081 | ||
1082 | spin_lock(&hba->device_lock); | |
1083 | list_add_tail(&dev->dev_list, &hba->hba_dev_list); | |
1084 | hba->dev_count++; | |
1085 | spin_unlock(&hba->device_lock); | |
1086 | /* | |
1087 | * Setup the SAM Task Attribute emulation for struct se_device | |
1088 | */ | |
1089 | core_setup_task_attr_emulation(dev); | |
1090 | /* | |
1091 | * Force PR and ALUA passthrough emulation with internal object use. | |
1092 | */ | |
1093 | force_pt = (hba->hba_flags & HBA_FLAGS_INTERNAL_USE); | |
1094 | /* | |
1095 | * Setup the Reservations infrastructure for struct se_device | |
1096 | */ | |
1097 | core_setup_reservations(dev, force_pt); | |
1098 | /* | |
1099 | * Setup the Asymmetric Logical Unit Assignment for struct se_device | |
1100 | */ | |
1101 | if (core_setup_alua(dev, force_pt) < 0) | |
1102 | goto out; | |
1103 | ||
1104 | /* | |
1105 | * Startup the struct se_device processing thread | |
1106 | */ | |
af877292 CH |
1107 | dev->tmr_wq = alloc_workqueue("tmr-%s", WQ_MEM_RECLAIM | WQ_UNBOUND, 1, |
1108 | dev->transport->name); | |
1109 | if (!dev->tmr_wq) { | |
1110 | pr_err("Unable to create tmr workqueue for %s\n", | |
e3d6f909 | 1111 | dev->transport->name); |
c66ac9db NB |
1112 | goto out; |
1113 | } | |
07bde79a NB |
1114 | /* |
1115 | * Setup work_queue for QUEUE_FULL | |
1116 | */ | |
1117 | INIT_WORK(&dev->qf_work_queue, target_qf_do_work); | |
c66ac9db NB |
1118 | /* |
1119 | * Preload the initial INQUIRY const values if we are doing | |
1120 | * anything virtual (IBLOCK, FILEIO, RAMDISK), but not for TCM/pSCSI | |
1121 | * passthrough because this is being provided by the backend LLD. | |
1122 | * This is required so that transport_get_inquiry() copies these | |
1123 | * originals once back into DEV_T10_WWN(dev) for the virtual device | |
1124 | * setup. | |
1125 | */ | |
e3d6f909 | 1126 | if (dev->transport->transport_type != TRANSPORT_PLUGIN_PHBA_PDEV) { |
f22c1196 | 1127 | if (!inquiry_prod || !inquiry_rev) { |
6708bb27 | 1128 | pr_err("All non TCM/pSCSI plugins require" |
c66ac9db NB |
1129 | " INQUIRY consts\n"); |
1130 | goto out; | |
1131 | } | |
1132 | ||
e3d6f909 AG |
1133 | strncpy(&dev->se_sub_dev->t10_wwn.vendor[0], "LIO-ORG", 8); |
1134 | strncpy(&dev->se_sub_dev->t10_wwn.model[0], inquiry_prod, 16); | |
1135 | strncpy(&dev->se_sub_dev->t10_wwn.revision[0], inquiry_rev, 4); | |
c66ac9db NB |
1136 | } |
1137 | scsi_dump_inquiry(dev); | |
1138 | ||
12a18bdc | 1139 | return dev; |
c66ac9db | 1140 | out: |
af877292 | 1141 | destroy_workqueue(dev->tmr_wq); |
c66ac9db NB |
1142 | |
1143 | spin_lock(&hba->device_lock); | |
1144 | list_del(&dev->dev_list); | |
1145 | hba->dev_count--; | |
1146 | spin_unlock(&hba->device_lock); | |
1147 | ||
1148 | se_release_vpd_for_dev(dev); | |
1149 | ||
c66ac9db NB |
1150 | kfree(dev); |
1151 | ||
1152 | return NULL; | |
1153 | } | |
1154 | EXPORT_SYMBOL(transport_add_device_to_core_hba); | |
1155 | ||
1fd032ee | 1156 | int target_cmd_size_check(struct se_cmd *cmd, unsigned int size) |
9b3b8041 CH |
1157 | { |
1158 | struct se_device *dev = cmd->se_dev; | |
1159 | ||
1160 | if (cmd->unknown_data_length) { | |
1161 | cmd->data_length = size; | |
1162 | } else if (size != cmd->data_length) { | |
1163 | pr_warn("TARGET_CORE[%s]: Expected Transfer Length:" | |
1164 | " %u does not match SCSI CDB Length: %u for SAM Opcode:" | |
1165 | " 0x%02x\n", cmd->se_tfo->get_fabric_name(), | |
1166 | cmd->data_length, size, cmd->t_task_cdb[0]); | |
1167 | ||
1168 | cmd->cmd_spdtl = size; | |
1169 | ||
1170 | if (cmd->data_direction == DMA_TO_DEVICE) { | |
1171 | pr_err("Rejecting underflow/overflow" | |
1172 | " WRITE data\n"); | |
1173 | goto out_invalid_cdb_field; | |
1174 | } | |
1175 | /* | |
1176 | * Reject READ_* or WRITE_* with overflow/underflow for | |
1177 | * type SCF_SCSI_DATA_CDB. | |
1178 | */ | |
1179 | if (dev->se_sub_dev->se_dev_attrib.block_size != 512) { | |
1180 | pr_err("Failing OVERFLOW/UNDERFLOW for LBA op" | |
1181 | " CDB on non 512-byte sector setup subsystem" | |
1182 | " plugin: %s\n", dev->transport->name); | |
1183 | /* Returns CHECK_CONDITION + INVALID_CDB_FIELD */ | |
1184 | goto out_invalid_cdb_field; | |
1185 | } | |
1186 | ||
1187 | if (size > cmd->data_length) { | |
1188 | cmd->se_cmd_flags |= SCF_OVERFLOW_BIT; | |
1189 | cmd->residual_count = (size - cmd->data_length); | |
1190 | } else { | |
1191 | cmd->se_cmd_flags |= SCF_UNDERFLOW_BIT; | |
1192 | cmd->residual_count = (cmd->data_length - size); | |
1193 | } | |
1194 | cmd->data_length = size; | |
1195 | } | |
1196 | ||
1197 | return 0; | |
1198 | ||
1199 | out_invalid_cdb_field: | |
1200 | cmd->se_cmd_flags |= SCF_SCSI_CDB_EXCEPTION; | |
1201 | cmd->scsi_sense_reason = TCM_INVALID_CDB_FIELD; | |
1202 | return -EINVAL; | |
1203 | } | |
1204 | ||
c66ac9db NB |
1205 | /* |
1206 | * Used by fabric modules containing a local struct se_cmd within their | |
1207 | * fabric dependent per I/O descriptor. | |
1208 | */ | |
1209 | void transport_init_se_cmd( | |
1210 | struct se_cmd *cmd, | |
1211 | struct target_core_fabric_ops *tfo, | |
1212 | struct se_session *se_sess, | |
1213 | u32 data_length, | |
1214 | int data_direction, | |
1215 | int task_attr, | |
1216 | unsigned char *sense_buffer) | |
1217 | { | |
5951146d AG |
1218 | INIT_LIST_HEAD(&cmd->se_lun_node); |
1219 | INIT_LIST_HEAD(&cmd->se_delayed_node); | |
07bde79a | 1220 | INIT_LIST_HEAD(&cmd->se_qf_node); |
a17f091d | 1221 | INIT_LIST_HEAD(&cmd->se_cmd_list); |
cf572a96 | 1222 | INIT_LIST_HEAD(&cmd->state_list); |
a1d8b49a AG |
1223 | init_completion(&cmd->transport_lun_fe_stop_comp); |
1224 | init_completion(&cmd->transport_lun_stop_comp); | |
1225 | init_completion(&cmd->t_transport_stop_comp); | |
a17f091d | 1226 | init_completion(&cmd->cmd_wait_comp); |
cf572a96 | 1227 | init_completion(&cmd->task_stop_comp); |
a1d8b49a | 1228 | spin_lock_init(&cmd->t_state_lock); |
7d680f3b | 1229 | cmd->transport_state = CMD_T_DEV_ACTIVE; |
c66ac9db NB |
1230 | |
1231 | cmd->se_tfo = tfo; | |
1232 | cmd->se_sess = se_sess; | |
1233 | cmd->data_length = data_length; | |
1234 | cmd->data_direction = data_direction; | |
1235 | cmd->sam_task_attr = task_attr; | |
1236 | cmd->sense_buffer = sense_buffer; | |
cf572a96 CH |
1237 | |
1238 | cmd->state_active = false; | |
c66ac9db NB |
1239 | } |
1240 | EXPORT_SYMBOL(transport_init_se_cmd); | |
1241 | ||
1242 | static int transport_check_alloc_task_attr(struct se_cmd *cmd) | |
1243 | { | |
1244 | /* | |
1245 | * Check if SAM Task Attribute emulation is enabled for this | |
1246 | * struct se_device storage object | |
1247 | */ | |
5951146d | 1248 | if (cmd->se_dev->dev_task_attr_type != SAM_TASK_ATTR_EMULATED) |
c66ac9db NB |
1249 | return 0; |
1250 | ||
e66ecd50 | 1251 | if (cmd->sam_task_attr == MSG_ACA_TAG) { |
6708bb27 | 1252 | pr_debug("SAM Task Attribute ACA" |
c66ac9db | 1253 | " emulation is not supported\n"); |
e3d6f909 | 1254 | return -EINVAL; |
c66ac9db NB |
1255 | } |
1256 | /* | |
1257 | * Used to determine when ORDERED commands should go from | |
1258 | * Dormant to Active status. | |
1259 | */ | |
5951146d | 1260 | cmd->se_ordered_id = atomic_inc_return(&cmd->se_dev->dev_ordered_id); |
c66ac9db | 1261 | smp_mb__after_atomic_inc(); |
6708bb27 | 1262 | pr_debug("Allocated se_ordered_id: %u for Task Attr: 0x%02x on %s\n", |
c66ac9db | 1263 | cmd->se_ordered_id, cmd->sam_task_attr, |
6708bb27 | 1264 | cmd->se_dev->transport->name); |
c66ac9db NB |
1265 | return 0; |
1266 | } | |
1267 | ||
a12f41f8 | 1268 | /* target_setup_cmd_from_cdb(): |
c66ac9db NB |
1269 | * |
1270 | * Called from fabric RX Thread. | |
1271 | */ | |
a12f41f8 | 1272 | int target_setup_cmd_from_cdb( |
c66ac9db NB |
1273 | struct se_cmd *cmd, |
1274 | unsigned char *cdb) | |
1275 | { | |
cb4f4d3c CH |
1276 | struct se_subsystem_dev *su_dev = cmd->se_dev->se_sub_dev; |
1277 | u32 pr_reg_type = 0; | |
1278 | u8 alua_ascq = 0; | |
1279 | unsigned long flags; | |
c66ac9db NB |
1280 | int ret; |
1281 | ||
c66ac9db NB |
1282 | /* |
1283 | * Ensure that the received CDB is less than the max (252 + 8) bytes | |
1284 | * for VARIABLE_LENGTH_CMD | |
1285 | */ | |
1286 | if (scsi_command_size(cdb) > SCSI_MAX_VARLEN_CDB_SIZE) { | |
6708bb27 | 1287 | pr_err("Received SCSI CDB with command_size: %d that" |
c66ac9db NB |
1288 | " exceeds SCSI_MAX_VARLEN_CDB_SIZE: %d\n", |
1289 | scsi_command_size(cdb), SCSI_MAX_VARLEN_CDB_SIZE); | |
03e98c9e NB |
1290 | cmd->se_cmd_flags |= SCF_SCSI_CDB_EXCEPTION; |
1291 | cmd->scsi_sense_reason = TCM_INVALID_CDB_FIELD; | |
e3d6f909 | 1292 | return -EINVAL; |
c66ac9db NB |
1293 | } |
1294 | /* | |
1295 | * If the received CDB is larger than TCM_MAX_COMMAND_SIZE, | |
1296 | * allocate the additional extended CDB buffer now.. Otherwise | |
1297 | * setup the pointer from __t_task_cdb to t_task_cdb. | |
1298 | */ | |
a1d8b49a AG |
1299 | if (scsi_command_size(cdb) > sizeof(cmd->__t_task_cdb)) { |
1300 | cmd->t_task_cdb = kzalloc(scsi_command_size(cdb), | |
c66ac9db | 1301 | GFP_KERNEL); |
6708bb27 AG |
1302 | if (!cmd->t_task_cdb) { |
1303 | pr_err("Unable to allocate cmd->t_task_cdb" | |
a1d8b49a | 1304 | " %u > sizeof(cmd->__t_task_cdb): %lu ops\n", |
c66ac9db | 1305 | scsi_command_size(cdb), |
a1d8b49a | 1306 | (unsigned long)sizeof(cmd->__t_task_cdb)); |
03e98c9e NB |
1307 | cmd->se_cmd_flags |= SCF_SCSI_CDB_EXCEPTION; |
1308 | cmd->scsi_sense_reason = | |
1309 | TCM_LOGICAL_UNIT_COMMUNICATION_FAILURE; | |
e3d6f909 | 1310 | return -ENOMEM; |
c66ac9db NB |
1311 | } |
1312 | } else | |
a1d8b49a | 1313 | cmd->t_task_cdb = &cmd->__t_task_cdb[0]; |
c66ac9db | 1314 | /* |
a1d8b49a | 1315 | * Copy the original CDB into cmd-> |
c66ac9db | 1316 | */ |
a1d8b49a | 1317 | memcpy(cmd->t_task_cdb, cdb, scsi_command_size(cdb)); |
cb4f4d3c CH |
1318 | |
1319 | /* | |
1320 | * Check for an existing UNIT ATTENTION condition | |
1321 | */ | |
1322 | if (core_scsi3_ua_check(cmd, cdb) < 0) { | |
1323 | cmd->se_cmd_flags |= SCF_SCSI_CDB_EXCEPTION; | |
1324 | cmd->scsi_sense_reason = TCM_CHECK_CONDITION_UNIT_ATTENTION; | |
1325 | return -EINVAL; | |
1326 | } | |
1327 | ||
1328 | ret = su_dev->t10_alua.alua_state_check(cmd, cdb, &alua_ascq); | |
1329 | if (ret != 0) { | |
1330 | /* | |
1331 | * Set SCSI additional sense code (ASC) to 'LUN Not Accessible'; | |
1332 | * The ALUA additional sense code qualifier (ASCQ) is determined | |
1333 | * by the ALUA primary or secondary access state.. | |
1334 | */ | |
1335 | if (ret > 0) { | |
1336 | pr_debug("[%s]: ALUA TG Port not available, " | |
1337 | "SenseKey: NOT_READY, ASC/ASCQ: " | |
1338 | "0x04/0x%02x\n", | |
1339 | cmd->se_tfo->get_fabric_name(), alua_ascq); | |
1340 | ||
1341 | transport_set_sense_codes(cmd, 0x04, alua_ascq); | |
1342 | cmd->se_cmd_flags |= SCF_SCSI_CDB_EXCEPTION; | |
1343 | cmd->scsi_sense_reason = TCM_CHECK_CONDITION_NOT_READY; | |
1344 | return -EINVAL; | |
1345 | } | |
1346 | cmd->se_cmd_flags |= SCF_SCSI_CDB_EXCEPTION; | |
1347 | cmd->scsi_sense_reason = TCM_INVALID_CDB_FIELD; | |
1348 | return -EINVAL; | |
1349 | } | |
1350 | ||
1351 | /* | |
1352 | * Check status for SPC-3 Persistent Reservations | |
1353 | */ | |
1354 | if (su_dev->t10_pr.pr_ops.t10_reservation_check(cmd, &pr_reg_type)) { | |
1355 | if (su_dev->t10_pr.pr_ops.t10_seq_non_holder( | |
1356 | cmd, cdb, pr_reg_type) != 0) { | |
1357 | cmd->se_cmd_flags |= SCF_SCSI_CDB_EXCEPTION; | |
1358 | cmd->se_cmd_flags |= SCF_SCSI_RESERVATION_CONFLICT; | |
1359 | cmd->scsi_status = SAM_STAT_RESERVATION_CONFLICT; | |
1360 | cmd->scsi_sense_reason = TCM_RESERVATION_CONFLICT; | |
1361 | return -EBUSY; | |
1362 | } | |
1363 | /* | |
1364 | * This means the CDB is allowed for the SCSI Initiator port | |
1365 | * when said port is *NOT* holding the legacy SPC-2 or | |
1366 | * SPC-3 Persistent Reservation. | |
1367 | */ | |
1368 | } | |
1369 | ||
1fd032ee | 1370 | ret = cmd->se_dev->transport->parse_cdb(cmd); |
c66ac9db NB |
1371 | if (ret < 0) |
1372 | return ret; | |
cb4f4d3c CH |
1373 | |
1374 | spin_lock_irqsave(&cmd->t_state_lock, flags); | |
1375 | cmd->se_cmd_flags |= SCF_SUPPORTED_SAM_OPCODE; | |
1376 | spin_unlock_irqrestore(&cmd->t_state_lock, flags); | |
1377 | ||
c66ac9db NB |
1378 | /* |
1379 | * Check for SAM Task Attribute Emulation | |
1380 | */ | |
1381 | if (transport_check_alloc_task_attr(cmd) < 0) { | |
1382 | cmd->se_cmd_flags |= SCF_SCSI_CDB_EXCEPTION; | |
1383 | cmd->scsi_sense_reason = TCM_INVALID_CDB_FIELD; | |
5951146d | 1384 | return -EINVAL; |
c66ac9db NB |
1385 | } |
1386 | spin_lock(&cmd->se_lun->lun_sep_lock); | |
1387 | if (cmd->se_lun->lun_sep) | |
1388 | cmd->se_lun->lun_sep->sep_stats.cmd_pdus++; | |
1389 | spin_unlock(&cmd->se_lun->lun_sep_lock); | |
1390 | return 0; | |
1391 | } | |
a12f41f8 | 1392 | EXPORT_SYMBOL(target_setup_cmd_from_cdb); |
c66ac9db | 1393 | |
695434e1 NB |
1394 | /* |
1395 | * Used by fabric module frontends to queue tasks directly. | |
1396 | * Many only be used from process context only | |
1397 | */ | |
1398 | int transport_handle_cdb_direct( | |
1399 | struct se_cmd *cmd) | |
1400 | { | |
dd8ae59d NB |
1401 | int ret; |
1402 | ||
695434e1 NB |
1403 | if (!cmd->se_lun) { |
1404 | dump_stack(); | |
6708bb27 | 1405 | pr_err("cmd->se_lun is NULL\n"); |
695434e1 NB |
1406 | return -EINVAL; |
1407 | } | |
1408 | if (in_interrupt()) { | |
1409 | dump_stack(); | |
6708bb27 | 1410 | pr_err("transport_generic_handle_cdb cannot be called" |
695434e1 NB |
1411 | " from interrupt context\n"); |
1412 | return -EINVAL; | |
1413 | } | |
dd8ae59d | 1414 | /* |
af877292 CH |
1415 | * Set TRANSPORT_NEW_CMD state and CMD_T_ACTIVE to ensure that |
1416 | * outstanding descriptors are handled correctly during shutdown via | |
1417 | * transport_wait_for_tasks() | |
dd8ae59d NB |
1418 | * |
1419 | * Also, we don't take cmd->t_state_lock here as we only expect | |
1420 | * this to be called for initial descriptor submission. | |
1421 | */ | |
1422 | cmd->t_state = TRANSPORT_NEW_CMD; | |
7d680f3b CH |
1423 | cmd->transport_state |= CMD_T_ACTIVE; |
1424 | ||
dd8ae59d NB |
1425 | /* |
1426 | * transport_generic_new_cmd() is already handling QUEUE_FULL, | |
1427 | * so follow TRANSPORT_NEW_CMD processing thread context usage | |
1428 | * and call transport_generic_request_failure() if necessary.. | |
1429 | */ | |
1430 | ret = transport_generic_new_cmd(cmd); | |
03e98c9e NB |
1431 | if (ret < 0) |
1432 | transport_generic_request_failure(cmd); | |
1433 | ||
dd8ae59d | 1434 | return 0; |
695434e1 NB |
1435 | } |
1436 | EXPORT_SYMBOL(transport_handle_cdb_direct); | |
1437 | ||
a6360785 NB |
1438 | /** |
1439 | * target_submit_cmd - lookup unpacked lun and submit uninitialized se_cmd | |
1440 | * | |
1441 | * @se_cmd: command descriptor to submit | |
1442 | * @se_sess: associated se_sess for endpoint | |
1443 | * @cdb: pointer to SCSI CDB | |
1444 | * @sense: pointer to SCSI sense buffer | |
1445 | * @unpacked_lun: unpacked LUN to reference for struct se_lun | |
1446 | * @data_length: fabric expected data transfer length | |
1447 | * @task_addr: SAM task attribute | |
1448 | * @data_dir: DMA data direction | |
1449 | * @flags: flags for command submission from target_sc_flags_tables | |
1450 | * | |
1451 | * This may only be called from process context, and also currently | |
1452 | * assumes internal allocation of fabric payload buffer by target-core. | |
1453 | **/ | |
1edcdb49 | 1454 | void target_submit_cmd(struct se_cmd *se_cmd, struct se_session *se_sess, |
a6360785 NB |
1455 | unsigned char *cdb, unsigned char *sense, u32 unpacked_lun, |
1456 | u32 data_length, int task_attr, int data_dir, int flags) | |
1457 | { | |
1458 | struct se_portal_group *se_tpg; | |
1459 | int rc; | |
1460 | ||
1461 | se_tpg = se_sess->se_tpg; | |
1462 | BUG_ON(!se_tpg); | |
1463 | BUG_ON(se_cmd->se_tfo || se_cmd->se_sess); | |
1464 | BUG_ON(in_interrupt()); | |
1465 | /* | |
1466 | * Initialize se_cmd for target operation. From this point | |
1467 | * exceptions are handled by sending exception status via | |
1468 | * target_core_fabric_ops->queue_status() callback | |
1469 | */ | |
1470 | transport_init_se_cmd(se_cmd, se_tpg->se_tpg_tfo, se_sess, | |
1471 | data_length, data_dir, task_attr, sense); | |
b0d79946 SAS |
1472 | if (flags & TARGET_SCF_UNKNOWN_SIZE) |
1473 | se_cmd->unknown_data_length = 1; | |
a6360785 NB |
1474 | /* |
1475 | * Obtain struct se_cmd->cmd_kref reference and add new cmd to | |
1476 | * se_sess->sess_cmd_list. A second kref_get here is necessary | |
1477 | * for fabrics using TARGET_SCF_ACK_KREF that expect a second | |
1478 | * kref_put() to happen during fabric packet acknowledgement. | |
1479 | */ | |
bc187ea6 RD |
1480 | rc = target_get_sess_cmd(se_sess, se_cmd, (flags & TARGET_SCF_ACK_KREF)); |
1481 | if (rc) | |
1482 | return; | |
a6360785 NB |
1483 | /* |
1484 | * Signal bidirectional data payloads to target-core | |
1485 | */ | |
1486 | if (flags & TARGET_SCF_BIDI_OP) | |
1487 | se_cmd->se_cmd_flags |= SCF_BIDI; | |
1488 | /* | |
1489 | * Locate se_lun pointer and attach it to struct se_cmd | |
1490 | */ | |
735703ca NB |
1491 | if (transport_lookup_cmd_lun(se_cmd, unpacked_lun) < 0) { |
1492 | transport_send_check_condition_and_sense(se_cmd, | |
1493 | se_cmd->scsi_sense_reason, 0); | |
1494 | target_put_sess_cmd(se_sess, se_cmd); | |
1495 | return; | |
1496 | } | |
d6e0175c | 1497 | |
a12f41f8 | 1498 | rc = target_setup_cmd_from_cdb(se_cmd, cdb); |
735703ca NB |
1499 | if (rc != 0) { |
1500 | transport_generic_request_failure(se_cmd); | |
1501 | return; | |
1502 | } | |
11e319ed AG |
1503 | |
1504 | /* | |
1505 | * Check if we need to delay processing because of ALUA | |
1506 | * Active/NonOptimized primary access state.. | |
1507 | */ | |
1508 | core_alua_check_nonop_delay(se_cmd); | |
1509 | ||
a6360785 | 1510 | transport_handle_cdb_direct(se_cmd); |
1edcdb49 | 1511 | return; |
a6360785 NB |
1512 | } |
1513 | EXPORT_SYMBOL(target_submit_cmd); | |
1514 | ||
9f0d05c2 NB |
1515 | static void target_complete_tmr_failure(struct work_struct *work) |
1516 | { | |
1517 | struct se_cmd *se_cmd = container_of(work, struct se_cmd, work); | |
1518 | ||
1519 | se_cmd->se_tmr_req->response = TMR_LUN_DOES_NOT_EXIST; | |
1520 | se_cmd->se_tfo->queue_tm_rsp(se_cmd); | |
1521 | transport_generic_free_cmd(se_cmd, 0); | |
1522 | } | |
1523 | ||
ea98d7f9 AG |
1524 | /** |
1525 | * target_submit_tmr - lookup unpacked lun and submit uninitialized se_cmd | |
1526 | * for TMR CDBs | |
1527 | * | |
1528 | * @se_cmd: command descriptor to submit | |
1529 | * @se_sess: associated se_sess for endpoint | |
1530 | * @sense: pointer to SCSI sense buffer | |
1531 | * @unpacked_lun: unpacked LUN to reference for struct se_lun | |
1532 | * @fabric_context: fabric context for TMR req | |
1533 | * @tm_type: Type of TM request | |
c0974f89 NB |
1534 | * @gfp: gfp type for caller |
1535 | * @tag: referenced task tag for TMR_ABORT_TASK | |
c7042cae | 1536 | * @flags: submit cmd flags |
ea98d7f9 AG |
1537 | * |
1538 | * Callable from all contexts. | |
1539 | **/ | |
1540 | ||
c7042cae | 1541 | int target_submit_tmr(struct se_cmd *se_cmd, struct se_session *se_sess, |
ea98d7f9 | 1542 | unsigned char *sense, u32 unpacked_lun, |
c0974f89 NB |
1543 | void *fabric_tmr_ptr, unsigned char tm_type, |
1544 | gfp_t gfp, unsigned int tag, int flags) | |
ea98d7f9 AG |
1545 | { |
1546 | struct se_portal_group *se_tpg; | |
1547 | int ret; | |
1548 | ||
1549 | se_tpg = se_sess->se_tpg; | |
1550 | BUG_ON(!se_tpg); | |
1551 | ||
1552 | transport_init_se_cmd(se_cmd, se_tpg->se_tpg_tfo, se_sess, | |
1553 | 0, DMA_NONE, MSG_SIMPLE_TAG, sense); | |
c7042cae NB |
1554 | /* |
1555 | * FIXME: Currently expect caller to handle se_cmd->se_tmr_req | |
1556 | * allocation failure. | |
1557 | */ | |
c0974f89 | 1558 | ret = core_tmr_alloc_req(se_cmd, fabric_tmr_ptr, tm_type, gfp); |
c7042cae NB |
1559 | if (ret < 0) |
1560 | return -ENOMEM; | |
ea98d7f9 | 1561 | |
c0974f89 NB |
1562 | if (tm_type == TMR_ABORT_TASK) |
1563 | se_cmd->se_tmr_req->ref_task_tag = tag; | |
1564 | ||
ea98d7f9 | 1565 | /* See target_submit_cmd for commentary */ |
bc187ea6 RD |
1566 | ret = target_get_sess_cmd(se_sess, se_cmd, (flags & TARGET_SCF_ACK_KREF)); |
1567 | if (ret) { | |
1568 | core_tmr_release_req(se_cmd->se_tmr_req); | |
1569 | return ret; | |
1570 | } | |
ea98d7f9 | 1571 | |
ea98d7f9 AG |
1572 | ret = transport_lookup_tmr_lun(se_cmd, unpacked_lun); |
1573 | if (ret) { | |
9f0d05c2 NB |
1574 | /* |
1575 | * For callback during failure handling, push this work off | |
1576 | * to process context with TMR_LUN_DOES_NOT_EXIST status. | |
1577 | */ | |
1578 | INIT_WORK(&se_cmd->work, target_complete_tmr_failure); | |
1579 | schedule_work(&se_cmd->work); | |
c7042cae | 1580 | return 0; |
ea98d7f9 AG |
1581 | } |
1582 | transport_generic_handle_tmr(se_cmd); | |
c7042cae | 1583 | return 0; |
ea98d7f9 AG |
1584 | } |
1585 | EXPORT_SYMBOL(target_submit_tmr); | |
1586 | ||
cdbb70bb | 1587 | /* |
cf572a96 | 1588 | * If the cmd is active, request it to be stopped and sleep until it |
cdbb70bb CH |
1589 | * has completed. |
1590 | */ | |
cf572a96 | 1591 | bool target_stop_cmd(struct se_cmd *cmd, unsigned long *flags) |
cdbb70bb | 1592 | { |
cdbb70bb CH |
1593 | bool was_active = false; |
1594 | ||
cf572a96 CH |
1595 | if (cmd->transport_state & CMD_T_BUSY) { |
1596 | cmd->transport_state |= CMD_T_REQUEST_STOP; | |
cdbb70bb CH |
1597 | spin_unlock_irqrestore(&cmd->t_state_lock, *flags); |
1598 | ||
cf572a96 CH |
1599 | pr_debug("cmd %p waiting to complete\n", cmd); |
1600 | wait_for_completion(&cmd->task_stop_comp); | |
1601 | pr_debug("cmd %p stopped successfully\n", cmd); | |
cdbb70bb CH |
1602 | |
1603 | spin_lock_irqsave(&cmd->t_state_lock, *flags); | |
cf572a96 CH |
1604 | cmd->transport_state &= ~CMD_T_REQUEST_STOP; |
1605 | cmd->transport_state &= ~CMD_T_BUSY; | |
cdbb70bb CH |
1606 | was_active = true; |
1607 | } | |
1608 | ||
cdbb70bb CH |
1609 | return was_active; |
1610 | } | |
1611 | ||
c66ac9db NB |
1612 | /* |
1613 | * Handle SAM-esque emulation for generic transport request failures. | |
1614 | */ | |
2fbff127 | 1615 | void transport_generic_request_failure(struct se_cmd *cmd) |
c66ac9db | 1616 | { |
07bde79a NB |
1617 | int ret = 0; |
1618 | ||
6708bb27 | 1619 | pr_debug("-----[ Storage Engine Exception for cmd: %p ITT: 0x%08x" |
e3d6f909 | 1620 | " CDB: 0x%02x\n", cmd, cmd->se_tfo->get_task_tag(cmd), |
a1d8b49a | 1621 | cmd->t_task_cdb[0]); |
03e98c9e | 1622 | pr_debug("-----[ i_state: %d t_state: %d scsi_sense_reason: %d\n", |
e3d6f909 | 1623 | cmd->se_tfo->get_cmd_state(cmd), |
03e98c9e | 1624 | cmd->t_state, cmd->scsi_sense_reason); |
d43d6aea | 1625 | pr_debug("-----[ CMD_T_ACTIVE: %d CMD_T_STOP: %d CMD_T_SENT: %d\n", |
7d680f3b CH |
1626 | (cmd->transport_state & CMD_T_ACTIVE) != 0, |
1627 | (cmd->transport_state & CMD_T_STOP) != 0, | |
1628 | (cmd->transport_state & CMD_T_SENT) != 0); | |
c66ac9db | 1629 | |
c66ac9db NB |
1630 | /* |
1631 | * For SAM Task Attribute emulation for failed struct se_cmd | |
1632 | */ | |
1633 | if (cmd->se_dev->dev_task_attr_type == SAM_TASK_ATTR_EMULATED) | |
1634 | transport_complete_task_attr(cmd); | |
1635 | ||
03e98c9e NB |
1636 | switch (cmd->scsi_sense_reason) { |
1637 | case TCM_NON_EXISTENT_LUN: | |
1638 | case TCM_UNSUPPORTED_SCSI_OPCODE: | |
1639 | case TCM_INVALID_CDB_FIELD: | |
1640 | case TCM_INVALID_PARAMETER_LIST: | |
1641 | case TCM_LOGICAL_UNIT_COMMUNICATION_FAILURE: | |
1642 | case TCM_UNKNOWN_MODE_PAGE: | |
1643 | case TCM_WRITE_PROTECTED: | |
1644 | case TCM_CHECK_CONDITION_ABORT_CMD: | |
1645 | case TCM_CHECK_CONDITION_UNIT_ATTENTION: | |
1646 | case TCM_CHECK_CONDITION_NOT_READY: | |
c66ac9db | 1647 | break; |
03e98c9e | 1648 | case TCM_RESERVATION_CONFLICT: |
c66ac9db NB |
1649 | /* |
1650 | * No SENSE Data payload for this case, set SCSI Status | |
1651 | * and queue the response to $FABRIC_MOD. | |
1652 | * | |
1653 | * Uses linux/include/scsi/scsi.h SAM status codes defs | |
1654 | */ | |
1655 | cmd->scsi_status = SAM_STAT_RESERVATION_CONFLICT; | |
1656 | /* | |
1657 | * For UA Interlock Code 11b, a RESERVATION CONFLICT will | |
1658 | * establish a UNIT ATTENTION with PREVIOUS RESERVATION | |
1659 | * CONFLICT STATUS. | |
1660 | * | |
1661 | * See spc4r17, section 7.4.6 Control Mode Page, Table 349 | |
1662 | */ | |
e3d6f909 AG |
1663 | if (cmd->se_sess && |
1664 | cmd->se_dev->se_sub_dev->se_dev_attrib.emulate_ua_intlck_ctrl == 2) | |
1665 | core_scsi3_ua_allocate(cmd->se_sess->se_node_acl, | |
c66ac9db NB |
1666 | cmd->orig_fe_lun, 0x2C, |
1667 | ASCQ_2CH_PREVIOUS_RESERVATION_CONFLICT_STATUS); | |
1668 | ||
07bde79a | 1669 | ret = cmd->se_tfo->queue_status(cmd); |
f147abb4 | 1670 | if (ret == -EAGAIN || ret == -ENOMEM) |
07bde79a | 1671 | goto queue_full; |
c66ac9db | 1672 | goto check_stop; |
c66ac9db | 1673 | default: |
6708bb27 | 1674 | pr_err("Unknown transport error for CDB 0x%02x: %d\n", |
03e98c9e | 1675 | cmd->t_task_cdb[0], cmd->scsi_sense_reason); |
c66ac9db NB |
1676 | cmd->scsi_sense_reason = TCM_UNSUPPORTED_SCSI_OPCODE; |
1677 | break; | |
1678 | } | |
f3146437 | 1679 | |
03e98c9e NB |
1680 | ret = transport_send_check_condition_and_sense(cmd, |
1681 | cmd->scsi_sense_reason, 0); | |
1682 | if (ret == -EAGAIN || ret == -ENOMEM) | |
1683 | goto queue_full; | |
07bde79a | 1684 | |
c66ac9db NB |
1685 | check_stop: |
1686 | transport_lun_remove_cmd(cmd); | |
6708bb27 | 1687 | if (!transport_cmd_check_stop_to_fabric(cmd)) |
c66ac9db | 1688 | ; |
07bde79a NB |
1689 | return; |
1690 | ||
1691 | queue_full: | |
e057f533 CH |
1692 | cmd->t_state = TRANSPORT_COMPLETE_QF_OK; |
1693 | transport_handle_queue_full(cmd, cmd->se_dev); | |
c66ac9db | 1694 | } |
2fbff127 | 1695 | EXPORT_SYMBOL(transport_generic_request_failure); |
c66ac9db | 1696 | |
5f41a31d | 1697 | static void __target_execute_cmd(struct se_cmd *cmd) |
c66ac9db | 1698 | { |
0c2ad7d1 | 1699 | int error = 0; |
5f41a31d CH |
1700 | |
1701 | spin_lock_irq(&cmd->t_state_lock); | |
1702 | cmd->transport_state |= (CMD_T_BUSY|CMD_T_SENT); | |
1703 | spin_unlock_irq(&cmd->t_state_lock); | |
1704 | ||
1705 | if (cmd->execute_cmd) | |
1706 | error = cmd->execute_cmd(cmd); | |
5f41a31d CH |
1707 | |
1708 | if (error) { | |
1709 | spin_lock_irq(&cmd->t_state_lock); | |
1710 | cmd->transport_state &= ~(CMD_T_BUSY|CMD_T_SENT); | |
1711 | spin_unlock_irq(&cmd->t_state_lock); | |
1712 | ||
1713 | transport_generic_request_failure(cmd); | |
1714 | } | |
1715 | } | |
1716 | ||
70baf0ab | 1717 | void target_execute_cmd(struct se_cmd *cmd) |
5f41a31d CH |
1718 | { |
1719 | struct se_device *dev = cmd->se_dev; | |
1720 | ||
d59a02b4 CH |
1721 | /* |
1722 | * If the received CDB has aleady been aborted stop processing it here. | |
1723 | */ | |
1724 | if (transport_check_aborted_status(cmd, 1)) | |
1725 | return; | |
1726 | ||
f7113a47 CH |
1727 | /* |
1728 | * Determine if IOCTL context caller in requesting the stopping of this | |
1729 | * command for LUN shutdown purposes. | |
1730 | */ | |
1731 | spin_lock_irq(&cmd->t_state_lock); | |
1732 | if (cmd->transport_state & CMD_T_LUN_STOP) { | |
1733 | pr_debug("%s:%d CMD_T_LUN_STOP for ITT: 0x%08x\n", | |
1734 | __func__, __LINE__, cmd->se_tfo->get_task_tag(cmd)); | |
1735 | ||
1736 | cmd->transport_state &= ~CMD_T_ACTIVE; | |
1737 | spin_unlock_irq(&cmd->t_state_lock); | |
1738 | complete(&cmd->transport_lun_stop_comp); | |
1739 | return; | |
1740 | } | |
1741 | /* | |
1742 | * Determine if frontend context caller is requesting the stopping of | |
1743 | * this command for frontend exceptions. | |
1744 | */ | |
1745 | if (cmd->transport_state & CMD_T_STOP) { | |
1746 | pr_debug("%s:%d CMD_T_STOP for ITT: 0x%08x\n", | |
1747 | __func__, __LINE__, | |
1748 | cmd->se_tfo->get_task_tag(cmd)); | |
1749 | ||
1750 | spin_unlock_irq(&cmd->t_state_lock); | |
1751 | complete(&cmd->t_transport_stop_comp); | |
5f41a31d | 1752 | return; |
f7113a47 CH |
1753 | } |
1754 | ||
1755 | cmd->t_state = TRANSPORT_PROCESSING; | |
1756 | spin_unlock_irq(&cmd->t_state_lock); | |
5f41a31d CH |
1757 | |
1758 | if (dev->dev_task_attr_type != SAM_TASK_ATTR_EMULATED) | |
1759 | goto execute; | |
1760 | ||
c66ac9db | 1761 | /* |
25985edc | 1762 | * Check for the existence of HEAD_OF_QUEUE, and if true return 1 |
c66ac9db NB |
1763 | * to allow the passed struct se_cmd list of tasks to the front of the list. |
1764 | */ | |
5f41a31d CH |
1765 | switch (cmd->sam_task_attr) { |
1766 | case MSG_HEAD_TAG: | |
1767 | pr_debug("Added HEAD_OF_QUEUE for CDB: 0x%02x, " | |
1768 | "se_ordered_id: %u\n", | |
1769 | cmd->t_task_cdb[0], cmd->se_ordered_id); | |
1770 | goto execute; | |
1771 | case MSG_ORDERED_TAG: | |
1772 | atomic_inc(&dev->dev_ordered_sync); | |
c66ac9db NB |
1773 | smp_mb__after_atomic_inc(); |
1774 | ||
5f41a31d CH |
1775 | pr_debug("Added ORDERED for CDB: 0x%02x to ordered list, " |
1776 | " se_ordered_id: %u\n", | |
1777 | cmd->t_task_cdb[0], cmd->se_ordered_id); | |
1778 | ||
c66ac9db | 1779 | /* |
5f41a31d CH |
1780 | * Execute an ORDERED command if no other older commands |
1781 | * exist that need to be completed first. | |
c66ac9db | 1782 | */ |
5f41a31d CH |
1783 | if (!atomic_read(&dev->simple_cmds)) |
1784 | goto execute; | |
1785 | break; | |
1786 | default: | |
c66ac9db NB |
1787 | /* |
1788 | * For SIMPLE and UNTAGGED Task Attribute commands | |
1789 | */ | |
5f41a31d | 1790 | atomic_inc(&dev->simple_cmds); |
c66ac9db | 1791 | smp_mb__after_atomic_inc(); |
5f41a31d | 1792 | break; |
c66ac9db | 1793 | } |
5f41a31d CH |
1794 | |
1795 | if (atomic_read(&dev->dev_ordered_sync) != 0) { | |
1796 | spin_lock(&dev->delayed_cmd_lock); | |
5f41a31d CH |
1797 | list_add_tail(&cmd->se_delayed_node, &dev->delayed_cmd_list); |
1798 | spin_unlock(&dev->delayed_cmd_lock); | |
c66ac9db | 1799 | |
6708bb27 | 1800 | pr_debug("Added CDB: 0x%02x Task Attr: 0x%02x to" |
c66ac9db | 1801 | " delayed CMD list, se_ordered_id: %u\n", |
a1d8b49a | 1802 | cmd->t_task_cdb[0], cmd->sam_task_attr, |
c66ac9db | 1803 | cmd->se_ordered_id); |
5f41a31d | 1804 | return; |
c66ac9db | 1805 | } |
c66ac9db | 1806 | |
5f41a31d | 1807 | execute: |
c66ac9db | 1808 | /* |
5f41a31d | 1809 | * Otherwise, no ORDERED task attributes exist.. |
c66ac9db | 1810 | */ |
5f41a31d | 1811 | __target_execute_cmd(cmd); |
c66ac9db | 1812 | } |
70baf0ab | 1813 | EXPORT_SYMBOL(target_execute_cmd); |
c66ac9db | 1814 | |
c66ac9db NB |
1815 | /* |
1816 | * Used to obtain Sense Data from underlying Linux/SCSI struct scsi_cmnd | |
1817 | */ | |
1818 | static int transport_get_sense_data(struct se_cmd *cmd) | |
1819 | { | |
1820 | unsigned char *buffer = cmd->sense_buffer, *sense_buffer = NULL; | |
42bf829e | 1821 | struct se_device *dev = cmd->se_dev; |
c66ac9db NB |
1822 | unsigned long flags; |
1823 | u32 offset = 0; | |
1824 | ||
e3d6f909 AG |
1825 | WARN_ON(!cmd->se_lun); |
1826 | ||
42bf829e CH |
1827 | if (!dev) |
1828 | return 0; | |
1829 | ||
a1d8b49a | 1830 | spin_lock_irqsave(&cmd->t_state_lock, flags); |
c66ac9db | 1831 | if (cmd->se_cmd_flags & SCF_SENT_CHECK_CONDITION) { |
a1d8b49a | 1832 | spin_unlock_irqrestore(&cmd->t_state_lock, flags); |
c66ac9db NB |
1833 | return 0; |
1834 | } | |
1835 | ||
cf572a96 CH |
1836 | if (!(cmd->se_cmd_flags & SCF_TRANSPORT_TASK_SENSE)) |
1837 | goto out; | |
c66ac9db | 1838 | |
cf572a96 CH |
1839 | if (!dev->transport->get_sense_buffer) { |
1840 | pr_err("dev->transport->get_sense_buffer is NULL\n"); | |
1841 | goto out; | |
1842 | } | |
c66ac9db | 1843 | |
5787cacd | 1844 | sense_buffer = dev->transport->get_sense_buffer(cmd); |
cf572a96 | 1845 | if (!sense_buffer) { |
5787cacd | 1846 | pr_err("ITT 0x%08x cmd %p: Unable to locate" |
cf572a96 | 1847 | " sense buffer for task with sense\n", |
5787cacd | 1848 | cmd->se_tfo->get_task_tag(cmd), cmd); |
cf572a96 | 1849 | goto out; |
c66ac9db | 1850 | } |
5787cacd | 1851 | |
cf572a96 CH |
1852 | spin_unlock_irqrestore(&cmd->t_state_lock, flags); |
1853 | ||
1854 | offset = cmd->se_tfo->set_fabric_sense_len(cmd, TRANSPORT_SENSE_BUFFER); | |
1855 | ||
1856 | memcpy(&buffer[offset], sense_buffer, TRANSPORT_SENSE_BUFFER); | |
cf572a96 CH |
1857 | |
1858 | /* Automatically padded */ | |
1859 | cmd->scsi_sense_length = TRANSPORT_SENSE_BUFFER + offset; | |
1860 | ||
1861 | pr_debug("HBA_[%u]_PLUG[%s]: Set SAM STATUS: 0x%02x and sense\n", | |
1862 | dev->se_hba->hba_id, dev->transport->name, cmd->scsi_status); | |
1863 | return 0; | |
1864 | ||
785fdf70 | 1865 | out: |
a1d8b49a | 1866 | spin_unlock_irqrestore(&cmd->t_state_lock, flags); |
c66ac9db NB |
1867 | return -1; |
1868 | } | |
1869 | ||
5f41a31d CH |
1870 | /* |
1871 | * Process all commands up to the last received ORDERED task attribute which | |
1872 | * requires another blocking boundary | |
1873 | */ | |
1874 | static void target_restart_delayed_cmds(struct se_device *dev) | |
1875 | { | |
1876 | for (;;) { | |
1877 | struct se_cmd *cmd; | |
1878 | ||
1879 | spin_lock(&dev->delayed_cmd_lock); | |
1880 | if (list_empty(&dev->delayed_cmd_list)) { | |
1881 | spin_unlock(&dev->delayed_cmd_lock); | |
1882 | break; | |
1883 | } | |
1884 | ||
1885 | cmd = list_entry(dev->delayed_cmd_list.next, | |
1886 | struct se_cmd, se_delayed_node); | |
1887 | list_del(&cmd->se_delayed_node); | |
1888 | spin_unlock(&dev->delayed_cmd_lock); | |
1889 | ||
1890 | __target_execute_cmd(cmd); | |
1891 | ||
1892 | if (cmd->sam_task_attr == MSG_ORDERED_TAG) | |
1893 | break; | |
1894 | } | |
1895 | } | |
1896 | ||
c66ac9db | 1897 | /* |
35e0e757 | 1898 | * Called from I/O completion to determine which dormant/delayed |
c66ac9db NB |
1899 | * and ordered cmds need to have their tasks added to the execution queue. |
1900 | */ | |
1901 | static void transport_complete_task_attr(struct se_cmd *cmd) | |
1902 | { | |
5951146d | 1903 | struct se_device *dev = cmd->se_dev; |
c66ac9db | 1904 | |
e66ecd50 | 1905 | if (cmd->sam_task_attr == MSG_SIMPLE_TAG) { |
c66ac9db NB |
1906 | atomic_dec(&dev->simple_cmds); |
1907 | smp_mb__after_atomic_dec(); | |
1908 | dev->dev_cur_ordered_id++; | |
6708bb27 | 1909 | pr_debug("Incremented dev->dev_cur_ordered_id: %u for" |
c66ac9db NB |
1910 | " SIMPLE: %u\n", dev->dev_cur_ordered_id, |
1911 | cmd->se_ordered_id); | |
e66ecd50 | 1912 | } else if (cmd->sam_task_attr == MSG_HEAD_TAG) { |
c66ac9db | 1913 | dev->dev_cur_ordered_id++; |
6708bb27 | 1914 | pr_debug("Incremented dev_cur_ordered_id: %u for" |
c66ac9db NB |
1915 | " HEAD_OF_QUEUE: %u\n", dev->dev_cur_ordered_id, |
1916 | cmd->se_ordered_id); | |
e66ecd50 | 1917 | } else if (cmd->sam_task_attr == MSG_ORDERED_TAG) { |
c66ac9db NB |
1918 | atomic_dec(&dev->dev_ordered_sync); |
1919 | smp_mb__after_atomic_dec(); | |
c66ac9db NB |
1920 | |
1921 | dev->dev_cur_ordered_id++; | |
6708bb27 | 1922 | pr_debug("Incremented dev_cur_ordered_id: %u for ORDERED:" |
c66ac9db NB |
1923 | " %u\n", dev->dev_cur_ordered_id, cmd->se_ordered_id); |
1924 | } | |
c66ac9db | 1925 | |
5f41a31d | 1926 | target_restart_delayed_cmds(dev); |
c66ac9db NB |
1927 | } |
1928 | ||
e057f533 | 1929 | static void transport_complete_qf(struct se_cmd *cmd) |
07bde79a NB |
1930 | { |
1931 | int ret = 0; | |
1932 | ||
e057f533 CH |
1933 | if (cmd->se_dev->dev_task_attr_type == SAM_TASK_ATTR_EMULATED) |
1934 | transport_complete_task_attr(cmd); | |
1935 | ||
1936 | if (cmd->se_cmd_flags & SCF_TRANSPORT_TASK_SENSE) { | |
1937 | ret = cmd->se_tfo->queue_status(cmd); | |
1938 | if (ret) | |
1939 | goto out; | |
1940 | } | |
07bde79a NB |
1941 | |
1942 | switch (cmd->data_direction) { | |
1943 | case DMA_FROM_DEVICE: | |
1944 | ret = cmd->se_tfo->queue_data_in(cmd); | |
1945 | break; | |
1946 | case DMA_TO_DEVICE: | |
ec98f782 | 1947 | if (cmd->t_bidi_data_sg) { |
07bde79a NB |
1948 | ret = cmd->se_tfo->queue_data_in(cmd); |
1949 | if (ret < 0) | |
e057f533 | 1950 | break; |
07bde79a NB |
1951 | } |
1952 | /* Fall through for DMA_TO_DEVICE */ | |
1953 | case DMA_NONE: | |
1954 | ret = cmd->se_tfo->queue_status(cmd); | |
1955 | break; | |
1956 | default: | |
1957 | break; | |
1958 | } | |
1959 | ||
e057f533 CH |
1960 | out: |
1961 | if (ret < 0) { | |
1962 | transport_handle_queue_full(cmd, cmd->se_dev); | |
1963 | return; | |
1964 | } | |
1965 | transport_lun_remove_cmd(cmd); | |
1966 | transport_cmd_check_stop_to_fabric(cmd); | |
07bde79a NB |
1967 | } |
1968 | ||
1969 | static void transport_handle_queue_full( | |
1970 | struct se_cmd *cmd, | |
e057f533 | 1971 | struct se_device *dev) |
07bde79a NB |
1972 | { |
1973 | spin_lock_irq(&dev->qf_cmd_lock); | |
07bde79a NB |
1974 | list_add_tail(&cmd->se_qf_node, &cmd->se_dev->qf_cmd_list); |
1975 | atomic_inc(&dev->dev_qf_count); | |
1976 | smp_mb__after_atomic_inc(); | |
1977 | spin_unlock_irq(&cmd->se_dev->qf_cmd_lock); | |
1978 | ||
1979 | schedule_work(&cmd->se_dev->qf_work_queue); | |
1980 | } | |
1981 | ||
35e0e757 | 1982 | static void target_complete_ok_work(struct work_struct *work) |
c66ac9db | 1983 | { |
35e0e757 | 1984 | struct se_cmd *cmd = container_of(work, struct se_cmd, work); |
07bde79a | 1985 | int reason = 0, ret; |
35e0e757 | 1986 | |
c66ac9db NB |
1987 | /* |
1988 | * Check if we need to move delayed/dormant tasks from cmds on the | |
1989 | * delayed execution list after a HEAD_OF_QUEUE or ORDERED Task | |
1990 | * Attribute. | |
1991 | */ | |
5951146d | 1992 | if (cmd->se_dev->dev_task_attr_type == SAM_TASK_ATTR_EMULATED) |
c66ac9db | 1993 | transport_complete_task_attr(cmd); |
07bde79a NB |
1994 | /* |
1995 | * Check to schedule QUEUE_FULL work, or execute an existing | |
1996 | * cmd->transport_qf_callback() | |
1997 | */ | |
1998 | if (atomic_read(&cmd->se_dev->dev_qf_count) != 0) | |
1999 | schedule_work(&cmd->se_dev->qf_work_queue); | |
2000 | ||
c66ac9db NB |
2001 | /* |
2002 | * Check if we need to retrieve a sense buffer from | |
2003 | * the struct se_cmd in question. | |
2004 | */ | |
2005 | if (cmd->se_cmd_flags & SCF_TRANSPORT_TASK_SENSE) { | |
2006 | if (transport_get_sense_data(cmd) < 0) | |
2007 | reason = TCM_NON_EXISTENT_LUN; | |
2008 | ||
c66ac9db | 2009 | if (cmd->scsi_status) { |
07bde79a | 2010 | ret = transport_send_check_condition_and_sense( |
c66ac9db | 2011 | cmd, reason, 1); |
f147abb4 | 2012 | if (ret == -EAGAIN || ret == -ENOMEM) |
07bde79a NB |
2013 | goto queue_full; |
2014 | ||
c66ac9db NB |
2015 | transport_lun_remove_cmd(cmd); |
2016 | transport_cmd_check_stop_to_fabric(cmd); | |
2017 | return; | |
2018 | } | |
2019 | } | |
2020 | /* | |
25985edc | 2021 | * Check for a callback, used by amongst other things |
c66ac9db NB |
2022 | * XDWRITE_READ_10 emulation. |
2023 | */ | |
2024 | if (cmd->transport_complete_callback) | |
2025 | cmd->transport_complete_callback(cmd); | |
2026 | ||
2027 | switch (cmd->data_direction) { | |
2028 | case DMA_FROM_DEVICE: | |
2029 | spin_lock(&cmd->se_lun->lun_sep_lock); | |
e3d6f909 AG |
2030 | if (cmd->se_lun->lun_sep) { |
2031 | cmd->se_lun->lun_sep->sep_stats.tx_data_octets += | |
c66ac9db NB |
2032 | cmd->data_length; |
2033 | } | |
2034 | spin_unlock(&cmd->se_lun->lun_sep_lock); | |
c66ac9db | 2035 | |
07bde79a | 2036 | ret = cmd->se_tfo->queue_data_in(cmd); |
f147abb4 | 2037 | if (ret == -EAGAIN || ret == -ENOMEM) |
07bde79a | 2038 | goto queue_full; |
c66ac9db NB |
2039 | break; |
2040 | case DMA_TO_DEVICE: | |
2041 | spin_lock(&cmd->se_lun->lun_sep_lock); | |
e3d6f909 AG |
2042 | if (cmd->se_lun->lun_sep) { |
2043 | cmd->se_lun->lun_sep->sep_stats.rx_data_octets += | |
c66ac9db NB |
2044 | cmd->data_length; |
2045 | } | |
2046 | spin_unlock(&cmd->se_lun->lun_sep_lock); | |
2047 | /* | |
2048 | * Check if we need to send READ payload for BIDI-COMMAND | |
2049 | */ | |
ec98f782 | 2050 | if (cmd->t_bidi_data_sg) { |
c66ac9db | 2051 | spin_lock(&cmd->se_lun->lun_sep_lock); |
e3d6f909 AG |
2052 | if (cmd->se_lun->lun_sep) { |
2053 | cmd->se_lun->lun_sep->sep_stats.tx_data_octets += | |
c66ac9db NB |
2054 | cmd->data_length; |
2055 | } | |
2056 | spin_unlock(&cmd->se_lun->lun_sep_lock); | |
07bde79a | 2057 | ret = cmd->se_tfo->queue_data_in(cmd); |
f147abb4 | 2058 | if (ret == -EAGAIN || ret == -ENOMEM) |
07bde79a | 2059 | goto queue_full; |
c66ac9db NB |
2060 | break; |
2061 | } | |
2062 | /* Fall through for DMA_TO_DEVICE */ | |
2063 | case DMA_NONE: | |
07bde79a | 2064 | ret = cmd->se_tfo->queue_status(cmd); |
f147abb4 | 2065 | if (ret == -EAGAIN || ret == -ENOMEM) |
07bde79a | 2066 | goto queue_full; |
c66ac9db NB |
2067 | break; |
2068 | default: | |
2069 | break; | |
2070 | } | |
2071 | ||
2072 | transport_lun_remove_cmd(cmd); | |
2073 | transport_cmd_check_stop_to_fabric(cmd); | |
07bde79a NB |
2074 | return; |
2075 | ||
2076 | queue_full: | |
6708bb27 | 2077 | pr_debug("Handling complete_ok QUEUE_FULL: se_cmd: %p," |
07bde79a | 2078 | " data_direction: %d\n", cmd, cmd->data_direction); |
e057f533 CH |
2079 | cmd->t_state = TRANSPORT_COMPLETE_QF_OK; |
2080 | transport_handle_queue_full(cmd, cmd->se_dev); | |
c66ac9db NB |
2081 | } |
2082 | ||
6708bb27 | 2083 | static inline void transport_free_sgl(struct scatterlist *sgl, int nents) |
c66ac9db | 2084 | { |
ec98f782 | 2085 | struct scatterlist *sg; |
ec98f782 | 2086 | int count; |
c66ac9db | 2087 | |
6708bb27 AG |
2088 | for_each_sg(sgl, sg, nents, count) |
2089 | __free_page(sg_page(sg)); | |
c66ac9db | 2090 | |
6708bb27 AG |
2091 | kfree(sgl); |
2092 | } | |
c66ac9db | 2093 | |
6708bb27 AG |
2094 | static inline void transport_free_pages(struct se_cmd *cmd) |
2095 | { | |
2096 | if (cmd->se_cmd_flags & SCF_PASSTHROUGH_SG_TO_MEM_NOALLOC) | |
2097 | return; | |
2098 | ||
2099 | transport_free_sgl(cmd->t_data_sg, cmd->t_data_nents); | |
ec98f782 AG |
2100 | cmd->t_data_sg = NULL; |
2101 | cmd->t_data_nents = 0; | |
c66ac9db | 2102 | |
6708bb27 | 2103 | transport_free_sgl(cmd->t_bidi_data_sg, cmd->t_bidi_data_nents); |
ec98f782 AG |
2104 | cmd->t_bidi_data_sg = NULL; |
2105 | cmd->t_bidi_data_nents = 0; | |
c66ac9db NB |
2106 | } |
2107 | ||
e26d99ae CH |
2108 | /** |
2109 | * transport_release_cmd - free a command | |
2110 | * @cmd: command to free | |
2111 | * | |
2112 | * This routine unconditionally frees a command, and reference counting | |
2113 | * or list removal must be done in the caller. | |
2114 | */ | |
2115 | static void transport_release_cmd(struct se_cmd *cmd) | |
2116 | { | |
2117 | BUG_ON(!cmd->se_tfo); | |
2118 | ||
c8e31f26 | 2119 | if (cmd->se_cmd_flags & SCF_SCSI_TMR_CDB) |
e26d99ae CH |
2120 | core_tmr_release_req(cmd->se_tmr_req); |
2121 | if (cmd->t_task_cdb != cmd->__t_task_cdb) | |
2122 | kfree(cmd->t_task_cdb); | |
2123 | /* | |
7481deb4 NB |
2124 | * If this cmd has been setup with target_get_sess_cmd(), drop |
2125 | * the kref and call ->release_cmd() in kref callback. | |
e26d99ae | 2126 | */ |
7481deb4 NB |
2127 | if (cmd->check_release != 0) { |
2128 | target_put_sess_cmd(cmd->se_sess, cmd); | |
2129 | return; | |
2130 | } | |
e26d99ae CH |
2131 | cmd->se_tfo->release_cmd(cmd); |
2132 | } | |
2133 | ||
d3df7825 CH |
2134 | /** |
2135 | * transport_put_cmd - release a reference to a command | |
2136 | * @cmd: command to release | |
2137 | * | |
2138 | * This routine releases our reference to the command and frees it if possible. | |
2139 | */ | |
39c05f32 | 2140 | static void transport_put_cmd(struct se_cmd *cmd) |
c66ac9db NB |
2141 | { |
2142 | unsigned long flags; | |
c66ac9db | 2143 | |
a1d8b49a | 2144 | spin_lock_irqsave(&cmd->t_state_lock, flags); |
4911e3cc CH |
2145 | if (atomic_read(&cmd->t_fe_count)) { |
2146 | if (!atomic_dec_and_test(&cmd->t_fe_count)) | |
2147 | goto out_busy; | |
2148 | } | |
2149 | ||
7d680f3b CH |
2150 | if (cmd->transport_state & CMD_T_DEV_ACTIVE) { |
2151 | cmd->transport_state &= ~CMD_T_DEV_ACTIVE; | |
cf572a96 | 2152 | target_remove_from_state_list(cmd); |
c66ac9db | 2153 | } |
a1d8b49a | 2154 | spin_unlock_irqrestore(&cmd->t_state_lock, flags); |
c66ac9db | 2155 | |
c66ac9db | 2156 | transport_free_pages(cmd); |
31afc39c | 2157 | transport_release_cmd(cmd); |
39c05f32 | 2158 | return; |
4911e3cc CH |
2159 | out_busy: |
2160 | spin_unlock_irqrestore(&cmd->t_state_lock, flags); | |
c66ac9db NB |
2161 | } |
2162 | ||
c66ac9db | 2163 | /* |
ec98f782 AG |
2164 | * transport_generic_map_mem_to_cmd - Use fabric-alloced pages instead of |
2165 | * allocating in the core. | |
c66ac9db NB |
2166 | * @cmd: Associated se_cmd descriptor |
2167 | * @mem: SGL style memory for TCM WRITE / READ | |
2168 | * @sg_mem_num: Number of SGL elements | |
2169 | * @mem_bidi_in: SGL style memory for TCM BIDI READ | |
2170 | * @sg_mem_bidi_num: Number of BIDI READ SGL elements | |
2171 | * | |
2172 | * Return: nonzero return cmd was rejected for -ENOMEM or inproper usage | |
2173 | * of parameters. | |
2174 | */ | |
2175 | int transport_generic_map_mem_to_cmd( | |
2176 | struct se_cmd *cmd, | |
5951146d AG |
2177 | struct scatterlist *sgl, |
2178 | u32 sgl_count, | |
2179 | struct scatterlist *sgl_bidi, | |
2180 | u32 sgl_bidi_count) | |
c66ac9db | 2181 | { |
5951146d | 2182 | if (!sgl || !sgl_count) |
c66ac9db | 2183 | return 0; |
c66ac9db | 2184 | |
64f1db38 CH |
2185 | /* |
2186 | * Reject SCSI data overflow with map_mem_to_cmd() as incoming | |
2187 | * scatterlists already have been set to follow what the fabric | |
2188 | * passes for the original expected data transfer length. | |
2189 | */ | |
2190 | if (cmd->se_cmd_flags & SCF_OVERFLOW_BIT) { | |
2191 | pr_warn("Rejecting SCSI DATA overflow for fabric using" | |
2192 | " SCF_PASSTHROUGH_SG_TO_MEM_NOALLOC\n"); | |
2193 | cmd->se_cmd_flags |= SCF_SCSI_CDB_EXCEPTION; | |
2194 | cmd->scsi_sense_reason = TCM_INVALID_CDB_FIELD; | |
2195 | return -EINVAL; | |
2196 | } | |
c66ac9db | 2197 | |
64f1db38 CH |
2198 | cmd->t_data_sg = sgl; |
2199 | cmd->t_data_nents = sgl_count; | |
c66ac9db | 2200 | |
64f1db38 CH |
2201 | if (sgl_bidi && sgl_bidi_count) { |
2202 | cmd->t_bidi_data_sg = sgl_bidi; | |
2203 | cmd->t_bidi_data_nents = sgl_bidi_count; | |
c66ac9db | 2204 | } |
64f1db38 | 2205 | cmd->se_cmd_flags |= SCF_PASSTHROUGH_SG_TO_MEM_NOALLOC; |
c66ac9db NB |
2206 | return 0; |
2207 | } | |
2208 | EXPORT_SYMBOL(transport_generic_map_mem_to_cmd); | |
2209 | ||
4949314c | 2210 | void *transport_kmap_data_sg(struct se_cmd *cmd) |
05d1c7c0 | 2211 | { |
ec98f782 | 2212 | struct scatterlist *sg = cmd->t_data_sg; |
4949314c AG |
2213 | struct page **pages; |
2214 | int i; | |
05d1c7c0 | 2215 | |
ec98f782 | 2216 | BUG_ON(!sg); |
05d1c7c0 | 2217 | /* |
ec98f782 AG |
2218 | * We need to take into account a possible offset here for fabrics like |
2219 | * tcm_loop who may be using a contig buffer from the SCSI midlayer for | |
2220 | * control CDBs passed as SGLs via transport_generic_map_mem_to_cmd() | |
05d1c7c0 | 2221 | */ |
4949314c AG |
2222 | if (!cmd->t_data_nents) |
2223 | return NULL; | |
2224 | else if (cmd->t_data_nents == 1) | |
2225 | return kmap(sg_page(sg)) + sg->offset; | |
2226 | ||
2227 | /* >1 page. use vmap */ | |
2228 | pages = kmalloc(sizeof(*pages) * cmd->t_data_nents, GFP_KERNEL); | |
2229 | if (!pages) | |
2230 | return NULL; | |
2231 | ||
2232 | /* convert sg[] to pages[] */ | |
2233 | for_each_sg(cmd->t_data_sg, sg, cmd->t_data_nents, i) { | |
2234 | pages[i] = sg_page(sg); | |
2235 | } | |
2236 | ||
2237 | cmd->t_data_vmap = vmap(pages, cmd->t_data_nents, VM_MAP, PAGE_KERNEL); | |
2238 | kfree(pages); | |
2239 | if (!cmd->t_data_vmap) | |
2240 | return NULL; | |
2241 | ||
2242 | return cmd->t_data_vmap + cmd->t_data_sg[0].offset; | |
05d1c7c0 | 2243 | } |
4949314c | 2244 | EXPORT_SYMBOL(transport_kmap_data_sg); |
05d1c7c0 | 2245 | |
4949314c | 2246 | void transport_kunmap_data_sg(struct se_cmd *cmd) |
05d1c7c0 | 2247 | { |
a1edf9cf | 2248 | if (!cmd->t_data_nents) { |
4949314c | 2249 | return; |
a1edf9cf | 2250 | } else if (cmd->t_data_nents == 1) { |
4949314c | 2251 | kunmap(sg_page(cmd->t_data_sg)); |
a1edf9cf AG |
2252 | return; |
2253 | } | |
4949314c AG |
2254 | |
2255 | vunmap(cmd->t_data_vmap); | |
2256 | cmd->t_data_vmap = NULL; | |
05d1c7c0 | 2257 | } |
4949314c | 2258 | EXPORT_SYMBOL(transport_kunmap_data_sg); |
05d1c7c0 | 2259 | |
c66ac9db | 2260 | static int |
05d1c7c0 | 2261 | transport_generic_get_mem(struct se_cmd *cmd) |
c66ac9db | 2262 | { |
ec98f782 AG |
2263 | u32 length = cmd->data_length; |
2264 | unsigned int nents; | |
2265 | struct page *page; | |
9db9da33 | 2266 | gfp_t zero_flag; |
ec98f782 | 2267 | int i = 0; |
c66ac9db | 2268 | |
ec98f782 AG |
2269 | nents = DIV_ROUND_UP(length, PAGE_SIZE); |
2270 | cmd->t_data_sg = kmalloc(sizeof(struct scatterlist) * nents, GFP_KERNEL); | |
2271 | if (!cmd->t_data_sg) | |
2272 | return -ENOMEM; | |
c66ac9db | 2273 | |
ec98f782 AG |
2274 | cmd->t_data_nents = nents; |
2275 | sg_init_table(cmd->t_data_sg, nents); | |
c66ac9db | 2276 | |
64f1db38 | 2277 | zero_flag = cmd->se_cmd_flags & SCF_SCSI_DATA_CDB ? 0 : __GFP_ZERO; |
9db9da33 | 2278 | |
ec98f782 AG |
2279 | while (length) { |
2280 | u32 page_len = min_t(u32, length, PAGE_SIZE); | |
9db9da33 | 2281 | page = alloc_page(GFP_KERNEL | zero_flag); |
ec98f782 AG |
2282 | if (!page) |
2283 | goto out; | |
c66ac9db | 2284 | |
ec98f782 AG |
2285 | sg_set_page(&cmd->t_data_sg[i], page, page_len, 0); |
2286 | length -= page_len; | |
2287 | i++; | |
c66ac9db | 2288 | } |
c66ac9db | 2289 | return 0; |
c66ac9db | 2290 | |
ec98f782 AG |
2291 | out: |
2292 | while (i >= 0) { | |
2293 | __free_page(sg_page(&cmd->t_data_sg[i])); | |
2294 | i--; | |
c66ac9db | 2295 | } |
ec98f782 AG |
2296 | kfree(cmd->t_data_sg); |
2297 | cmd->t_data_sg = NULL; | |
2298 | return -ENOMEM; | |
c66ac9db NB |
2299 | } |
2300 | ||
da0f7619 | 2301 | /* |
b16a35b0 AG |
2302 | * Allocate any required resources to execute the command. For writes we |
2303 | * might not have the payload yet, so notify the fabric via a call to | |
2304 | * ->write_pending instead. Otherwise place it on the execution queue. | |
c66ac9db | 2305 | */ |
a1d8b49a | 2306 | int transport_generic_new_cmd(struct se_cmd *cmd) |
c66ac9db | 2307 | { |
c66ac9db NB |
2308 | int ret = 0; |
2309 | ||
2310 | /* | |
2311 | * Determine is the TCM fabric module has already allocated physical | |
2312 | * memory, and is directly calling transport_generic_map_mem_to_cmd() | |
ec98f782 | 2313 | * beforehand. |
c66ac9db | 2314 | */ |
ec98f782 AG |
2315 | if (!(cmd->se_cmd_flags & SCF_PASSTHROUGH_SG_TO_MEM_NOALLOC) && |
2316 | cmd->data_length) { | |
05d1c7c0 | 2317 | ret = transport_generic_get_mem(cmd); |
c66ac9db | 2318 | if (ret < 0) |
03e98c9e | 2319 | goto out_fail; |
c66ac9db | 2320 | } |
da0f7619 | 2321 | |
4101f0a8 | 2322 | /* Workaround for handling zero-length control CDBs */ |
64f1db38 | 2323 | if (!(cmd->se_cmd_flags & SCF_SCSI_DATA_CDB) && !cmd->data_length) { |
7d680f3b | 2324 | spin_lock_irq(&cmd->t_state_lock); |
410f6702 | 2325 | cmd->t_state = TRANSPORT_COMPLETE; |
7d680f3b CH |
2326 | cmd->transport_state |= CMD_T_ACTIVE; |
2327 | spin_unlock_irq(&cmd->t_state_lock); | |
91ec1d35 NB |
2328 | |
2329 | if (cmd->t_task_cdb[0] == REQUEST_SENSE) { | |
2330 | u8 ua_asc = 0, ua_ascq = 0; | |
2331 | ||
2332 | core_scsi3_ua_clear_for_request_sense(cmd, | |
2333 | &ua_asc, &ua_ascq); | |
2334 | } | |
2335 | ||
410f6702 RD |
2336 | INIT_WORK(&cmd->work, target_complete_ok_work); |
2337 | queue_work(target_completion_wq, &cmd->work); | |
2338 | return 0; | |
2339 | } | |
da0f7619 | 2340 | |
4101f0a8 | 2341 | atomic_inc(&cmd->t_fe_count); |
4101f0a8 | 2342 | |
c66ac9db | 2343 | /* |
c3196f0c CH |
2344 | * If this command is not a write we can execute it right here, |
2345 | * for write buffers we need to notify the fabric driver first | |
2346 | * and let it call back once the write buffers are ready. | |
c66ac9db | 2347 | */ |
5f41a31d | 2348 | target_add_to_state_list(cmd); |
c3196f0c CH |
2349 | if (cmd->data_direction != DMA_TO_DEVICE) { |
2350 | target_execute_cmd(cmd); | |
2351 | return 0; | |
2352 | } | |
2353 | ||
2354 | spin_lock_irq(&cmd->t_state_lock); | |
2355 | cmd->t_state = TRANSPORT_WRITE_PENDING; | |
2356 | spin_unlock_irq(&cmd->t_state_lock); | |
2357 | ||
2358 | transport_cmd_check_stop(cmd, false); | |
2359 | ||
2360 | ret = cmd->se_tfo->write_pending(cmd); | |
2361 | if (ret == -EAGAIN || ret == -ENOMEM) | |
2362 | goto queue_full; | |
2363 | ||
2364 | if (ret < 0) | |
2365 | return ret; | |
2366 | return 1; | |
da0f7619 CH |
2367 | |
2368 | out_fail: | |
2369 | cmd->se_cmd_flags |= SCF_SCSI_CDB_EXCEPTION; | |
2370 | cmd->scsi_sense_reason = TCM_LOGICAL_UNIT_COMMUNICATION_FAILURE; | |
2371 | return -EINVAL; | |
c3196f0c CH |
2372 | queue_full: |
2373 | pr_debug("Handling write_pending QUEUE__FULL: se_cmd: %p\n", cmd); | |
2374 | cmd->t_state = TRANSPORT_COMPLETE_QF_WP; | |
2375 | transport_handle_queue_full(cmd, cmd->se_dev); | |
2376 | return 0; | |
c66ac9db | 2377 | } |
a1d8b49a | 2378 | EXPORT_SYMBOL(transport_generic_new_cmd); |
c66ac9db | 2379 | |
e057f533 | 2380 | static void transport_write_pending_qf(struct se_cmd *cmd) |
07bde79a | 2381 | { |
f147abb4 NB |
2382 | int ret; |
2383 | ||
2384 | ret = cmd->se_tfo->write_pending(cmd); | |
2385 | if (ret == -EAGAIN || ret == -ENOMEM) { | |
e057f533 CH |
2386 | pr_debug("Handling write_pending QUEUE__FULL: se_cmd: %p\n", |
2387 | cmd); | |
2388 | transport_handle_queue_full(cmd, cmd->se_dev); | |
2389 | } | |
07bde79a NB |
2390 | } |
2391 | ||
39c05f32 | 2392 | void transport_generic_free_cmd(struct se_cmd *cmd, int wait_for_tasks) |
c66ac9db | 2393 | { |
d14921d6 | 2394 | if (!(cmd->se_cmd_flags & SCF_SE_LUN_CMD)) { |
c8e31f26 | 2395 | if (wait_for_tasks && (cmd->se_cmd_flags & SCF_SCSI_TMR_CDB)) |
d14921d6 NB |
2396 | transport_wait_for_tasks(cmd); |
2397 | ||
35462975 | 2398 | transport_release_cmd(cmd); |
d14921d6 NB |
2399 | } else { |
2400 | if (wait_for_tasks) | |
2401 | transport_wait_for_tasks(cmd); | |
2402 | ||
c66ac9db NB |
2403 | core_dec_lacl_count(cmd->se_sess->se_node_acl, cmd); |
2404 | ||
82f1c8a4 | 2405 | if (cmd->se_lun) |
c66ac9db | 2406 | transport_lun_remove_cmd(cmd); |
c66ac9db | 2407 | |
39c05f32 | 2408 | transport_put_cmd(cmd); |
c66ac9db NB |
2409 | } |
2410 | } | |
2411 | EXPORT_SYMBOL(transport_generic_free_cmd); | |
2412 | ||
a17f091d NB |
2413 | /* target_get_sess_cmd - Add command to active ->sess_cmd_list |
2414 | * @se_sess: session to reference | |
2415 | * @se_cmd: command descriptor to add | |
a6360785 | 2416 | * @ack_kref: Signal that fabric will perform an ack target_put_sess_cmd() |
a17f091d | 2417 | */ |
bc187ea6 RD |
2418 | static int target_get_sess_cmd(struct se_session *se_sess, struct se_cmd *se_cmd, |
2419 | bool ack_kref) | |
a17f091d NB |
2420 | { |
2421 | unsigned long flags; | |
bc187ea6 | 2422 | int ret = 0; |
a17f091d | 2423 | |
7481deb4 | 2424 | kref_init(&se_cmd->cmd_kref); |
a6360785 NB |
2425 | /* |
2426 | * Add a second kref if the fabric caller is expecting to handle | |
2427 | * fabric acknowledgement that requires two target_put_sess_cmd() | |
2428 | * invocations before se_cmd descriptor release. | |
2429 | */ | |
86715569 | 2430 | if (ack_kref == true) { |
a6360785 | 2431 | kref_get(&se_cmd->cmd_kref); |
86715569 NB |
2432 | se_cmd->se_cmd_flags |= SCF_ACK_KREF; |
2433 | } | |
7481deb4 | 2434 | |
a17f091d | 2435 | spin_lock_irqsave(&se_sess->sess_cmd_lock, flags); |
bc187ea6 RD |
2436 | if (se_sess->sess_tearing_down) { |
2437 | ret = -ESHUTDOWN; | |
2438 | goto out; | |
2439 | } | |
a17f091d NB |
2440 | list_add_tail(&se_cmd->se_cmd_list, &se_sess->sess_cmd_list); |
2441 | se_cmd->check_release = 1; | |
bc187ea6 RD |
2442 | |
2443 | out: | |
a17f091d | 2444 | spin_unlock_irqrestore(&se_sess->sess_cmd_lock, flags); |
bc187ea6 | 2445 | return ret; |
a17f091d | 2446 | } |
a17f091d | 2447 | |
7481deb4 | 2448 | static void target_release_cmd_kref(struct kref *kref) |
a17f091d | 2449 | { |
7481deb4 NB |
2450 | struct se_cmd *se_cmd = container_of(kref, struct se_cmd, cmd_kref); |
2451 | struct se_session *se_sess = se_cmd->se_sess; | |
a17f091d NB |
2452 | unsigned long flags; |
2453 | ||
2454 | spin_lock_irqsave(&se_sess->sess_cmd_lock, flags); | |
2455 | if (list_empty(&se_cmd->se_cmd_list)) { | |
2456 | spin_unlock_irqrestore(&se_sess->sess_cmd_lock, flags); | |
ffc32d52 | 2457 | se_cmd->se_tfo->release_cmd(se_cmd); |
7481deb4 | 2458 | return; |
a17f091d | 2459 | } |
a17f091d NB |
2460 | if (se_sess->sess_tearing_down && se_cmd->cmd_wait_set) { |
2461 | spin_unlock_irqrestore(&se_sess->sess_cmd_lock, flags); | |
2462 | complete(&se_cmd->cmd_wait_comp); | |
7481deb4 | 2463 | return; |
a17f091d NB |
2464 | } |
2465 | list_del(&se_cmd->se_cmd_list); | |
2466 | spin_unlock_irqrestore(&se_sess->sess_cmd_lock, flags); | |
2467 | ||
7481deb4 NB |
2468 | se_cmd->se_tfo->release_cmd(se_cmd); |
2469 | } | |
2470 | ||
2471 | /* target_put_sess_cmd - Check for active I/O shutdown via kref_put | |
2472 | * @se_sess: session to reference | |
2473 | * @se_cmd: command descriptor to drop | |
2474 | */ | |
2475 | int target_put_sess_cmd(struct se_session *se_sess, struct se_cmd *se_cmd) | |
2476 | { | |
2477 | return kref_put(&se_cmd->cmd_kref, target_release_cmd_kref); | |
a17f091d NB |
2478 | } |
2479 | EXPORT_SYMBOL(target_put_sess_cmd); | |
2480 | ||
2481 | /* target_splice_sess_cmd_list - Split active cmds into sess_wait_list | |
2482 | * @se_sess: session to split | |
2483 | */ | |
2484 | void target_splice_sess_cmd_list(struct se_session *se_sess) | |
2485 | { | |
2486 | struct se_cmd *se_cmd; | |
2487 | unsigned long flags; | |
2488 | ||
2489 | WARN_ON(!list_empty(&se_sess->sess_wait_list)); | |
2490 | INIT_LIST_HEAD(&se_sess->sess_wait_list); | |
2491 | ||
2492 | spin_lock_irqsave(&se_sess->sess_cmd_lock, flags); | |
2493 | se_sess->sess_tearing_down = 1; | |
2494 | ||
2495 | list_splice_init(&se_sess->sess_cmd_list, &se_sess->sess_wait_list); | |
2496 | ||
2497 | list_for_each_entry(se_cmd, &se_sess->sess_wait_list, se_cmd_list) | |
2498 | se_cmd->cmd_wait_set = 1; | |
2499 | ||
2500 | spin_unlock_irqrestore(&se_sess->sess_cmd_lock, flags); | |
2501 | } | |
2502 | EXPORT_SYMBOL(target_splice_sess_cmd_list); | |
2503 | ||
2504 | /* target_wait_for_sess_cmds - Wait for outstanding descriptors | |
2505 | * @se_sess: session to wait for active I/O | |
2506 | * @wait_for_tasks: Make extra transport_wait_for_tasks call | |
2507 | */ | |
2508 | void target_wait_for_sess_cmds( | |
2509 | struct se_session *se_sess, | |
2510 | int wait_for_tasks) | |
2511 | { | |
2512 | struct se_cmd *se_cmd, *tmp_cmd; | |
2513 | bool rc = false; | |
2514 | ||
2515 | list_for_each_entry_safe(se_cmd, tmp_cmd, | |
2516 | &se_sess->sess_wait_list, se_cmd_list) { | |
2517 | list_del(&se_cmd->se_cmd_list); | |
2518 | ||
2519 | pr_debug("Waiting for se_cmd: %p t_state: %d, fabric state:" | |
2520 | " %d\n", se_cmd, se_cmd->t_state, | |
2521 | se_cmd->se_tfo->get_cmd_state(se_cmd)); | |
2522 | ||
2523 | if (wait_for_tasks) { | |
2524 | pr_debug("Calling transport_wait_for_tasks se_cmd: %p t_state: %d," | |
2525 | " fabric state: %d\n", se_cmd, se_cmd->t_state, | |
2526 | se_cmd->se_tfo->get_cmd_state(se_cmd)); | |
2527 | ||
2528 | rc = transport_wait_for_tasks(se_cmd); | |
2529 | ||
2530 | pr_debug("After transport_wait_for_tasks se_cmd: %p t_state: %d," | |
2531 | " fabric state: %d\n", se_cmd, se_cmd->t_state, | |
2532 | se_cmd->se_tfo->get_cmd_state(se_cmd)); | |
2533 | } | |
2534 | ||
2535 | if (!rc) { | |
2536 | wait_for_completion(&se_cmd->cmd_wait_comp); | |
2537 | pr_debug("After cmd_wait_comp: se_cmd: %p t_state: %d" | |
2538 | " fabric state: %d\n", se_cmd, se_cmd->t_state, | |
2539 | se_cmd->se_tfo->get_cmd_state(se_cmd)); | |
2540 | } | |
2541 | ||
2542 | se_cmd->se_tfo->release_cmd(se_cmd); | |
2543 | } | |
2544 | } | |
2545 | EXPORT_SYMBOL(target_wait_for_sess_cmds); | |
2546 | ||
c66ac9db NB |
2547 | /* transport_lun_wait_for_tasks(): |
2548 | * | |
2549 | * Called from ConfigFS context to stop the passed struct se_cmd to allow | |
2550 | * an struct se_lun to be successfully shutdown. | |
2551 | */ | |
2552 | static int transport_lun_wait_for_tasks(struct se_cmd *cmd, struct se_lun *lun) | |
2553 | { | |
2554 | unsigned long flags; | |
cf572a96 CH |
2555 | int ret = 0; |
2556 | ||
c66ac9db NB |
2557 | /* |
2558 | * If the frontend has already requested this struct se_cmd to | |
2559 | * be stopped, we can safely ignore this struct se_cmd. | |
2560 | */ | |
a1d8b49a | 2561 | spin_lock_irqsave(&cmd->t_state_lock, flags); |
7d680f3b CH |
2562 | if (cmd->transport_state & CMD_T_STOP) { |
2563 | cmd->transport_state &= ~CMD_T_LUN_STOP; | |
2564 | ||
2565 | pr_debug("ConfigFS ITT[0x%08x] - CMD_T_STOP, skipping\n", | |
2566 | cmd->se_tfo->get_task_tag(cmd)); | |
a1d8b49a | 2567 | spin_unlock_irqrestore(&cmd->t_state_lock, flags); |
f7113a47 | 2568 | transport_cmd_check_stop(cmd, false); |
e3d6f909 | 2569 | return -EPERM; |
c66ac9db | 2570 | } |
7d680f3b | 2571 | cmd->transport_state |= CMD_T_LUN_FE_STOP; |
a1d8b49a | 2572 | spin_unlock_irqrestore(&cmd->t_state_lock, flags); |
c66ac9db | 2573 | |
cf572a96 CH |
2574 | // XXX: audit task_flags checks. |
2575 | spin_lock_irqsave(&cmd->t_state_lock, flags); | |
2576 | if ((cmd->transport_state & CMD_T_BUSY) && | |
2577 | (cmd->transport_state & CMD_T_SENT)) { | |
2578 | if (!target_stop_cmd(cmd, &flags)) | |
2579 | ret++; | |
cf572a96 | 2580 | } |
5f41a31d | 2581 | spin_unlock_irqrestore(&cmd->t_state_lock, flags); |
c66ac9db | 2582 | |
785fdf70 CH |
2583 | pr_debug("ConfigFS: cmd: %p stop tasks ret:" |
2584 | " %d\n", cmd, ret); | |
c66ac9db | 2585 | if (!ret) { |
6708bb27 | 2586 | pr_debug("ConfigFS: ITT[0x%08x] - stopping cmd....\n", |
e3d6f909 | 2587 | cmd->se_tfo->get_task_tag(cmd)); |
a1d8b49a | 2588 | wait_for_completion(&cmd->transport_lun_stop_comp); |
6708bb27 | 2589 | pr_debug("ConfigFS: ITT[0x%08x] - stopped cmd....\n", |
e3d6f909 | 2590 | cmd->se_tfo->get_task_tag(cmd)); |
c66ac9db | 2591 | } |
c66ac9db NB |
2592 | |
2593 | return 0; | |
2594 | } | |
2595 | ||
c66ac9db NB |
2596 | static void __transport_clear_lun_from_sessions(struct se_lun *lun) |
2597 | { | |
2598 | struct se_cmd *cmd = NULL; | |
2599 | unsigned long lun_flags, cmd_flags; | |
2600 | /* | |
2601 | * Do exception processing and return CHECK_CONDITION status to the | |
2602 | * Initiator Port. | |
2603 | */ | |
2604 | spin_lock_irqsave(&lun->lun_cmd_lock, lun_flags); | |
5951146d AG |
2605 | while (!list_empty(&lun->lun_cmd_list)) { |
2606 | cmd = list_first_entry(&lun->lun_cmd_list, | |
2607 | struct se_cmd, se_lun_node); | |
3d26fea0 | 2608 | list_del_init(&cmd->se_lun_node); |
5951146d | 2609 | |
a1d8b49a | 2610 | spin_lock(&cmd->t_state_lock); |
6708bb27 | 2611 | pr_debug("SE_LUN[%d] - Setting cmd->transport" |
c66ac9db | 2612 | "_lun_stop for ITT: 0x%08x\n", |
e3d6f909 AG |
2613 | cmd->se_lun->unpacked_lun, |
2614 | cmd->se_tfo->get_task_tag(cmd)); | |
7d680f3b | 2615 | cmd->transport_state |= CMD_T_LUN_STOP; |
a1d8b49a | 2616 | spin_unlock(&cmd->t_state_lock); |
c66ac9db NB |
2617 | |
2618 | spin_unlock_irqrestore(&lun->lun_cmd_lock, lun_flags); | |
2619 | ||
6708bb27 AG |
2620 | if (!cmd->se_lun) { |
2621 | pr_err("ITT: 0x%08x, [i,t]_state: %u/%u\n", | |
e3d6f909 AG |
2622 | cmd->se_tfo->get_task_tag(cmd), |
2623 | cmd->se_tfo->get_cmd_state(cmd), cmd->t_state); | |
c66ac9db NB |
2624 | BUG(); |
2625 | } | |
2626 | /* | |
2627 | * If the Storage engine still owns the iscsi_cmd_t, determine | |
2628 | * and/or stop its context. | |
2629 | */ | |
6708bb27 | 2630 | pr_debug("SE_LUN[%d] - ITT: 0x%08x before transport" |
e3d6f909 AG |
2631 | "_lun_wait_for_tasks()\n", cmd->se_lun->unpacked_lun, |
2632 | cmd->se_tfo->get_task_tag(cmd)); | |
c66ac9db | 2633 | |
e3d6f909 | 2634 | if (transport_lun_wait_for_tasks(cmd, cmd->se_lun) < 0) { |
c66ac9db NB |
2635 | spin_lock_irqsave(&lun->lun_cmd_lock, lun_flags); |
2636 | continue; | |
2637 | } | |
2638 | ||
6708bb27 | 2639 | pr_debug("SE_LUN[%d] - ITT: 0x%08x after transport_lun" |
c66ac9db | 2640 | "_wait_for_tasks(): SUCCESS\n", |
e3d6f909 AG |
2641 | cmd->se_lun->unpacked_lun, |
2642 | cmd->se_tfo->get_task_tag(cmd)); | |
c66ac9db | 2643 | |
a1d8b49a | 2644 | spin_lock_irqsave(&cmd->t_state_lock, cmd_flags); |
7d680f3b | 2645 | if (!(cmd->transport_state & CMD_T_DEV_ACTIVE)) { |
a1d8b49a | 2646 | spin_unlock_irqrestore(&cmd->t_state_lock, cmd_flags); |
c66ac9db NB |
2647 | goto check_cond; |
2648 | } | |
7d680f3b | 2649 | cmd->transport_state &= ~CMD_T_DEV_ACTIVE; |
cf572a96 | 2650 | target_remove_from_state_list(cmd); |
a1d8b49a | 2651 | spin_unlock_irqrestore(&cmd->t_state_lock, cmd_flags); |
c66ac9db | 2652 | |
c66ac9db NB |
2653 | /* |
2654 | * The Storage engine stopped this struct se_cmd before it was | |
2655 | * send to the fabric frontend for delivery back to the | |
2656 | * Initiator Node. Return this SCSI CDB back with an | |
2657 | * CHECK_CONDITION status. | |
2658 | */ | |
2659 | check_cond: | |
2660 | transport_send_check_condition_and_sense(cmd, | |
2661 | TCM_NON_EXISTENT_LUN, 0); | |
2662 | /* | |
2663 | * If the fabric frontend is waiting for this iscsi_cmd_t to | |
2664 | * be released, notify the waiting thread now that LU has | |
2665 | * finished accessing it. | |
2666 | */ | |
a1d8b49a | 2667 | spin_lock_irqsave(&cmd->t_state_lock, cmd_flags); |
7d680f3b | 2668 | if (cmd->transport_state & CMD_T_LUN_FE_STOP) { |
6708bb27 | 2669 | pr_debug("SE_LUN[%d] - Detected FE stop for" |
c66ac9db NB |
2670 | " struct se_cmd: %p ITT: 0x%08x\n", |
2671 | lun->unpacked_lun, | |
e3d6f909 | 2672 | cmd, cmd->se_tfo->get_task_tag(cmd)); |
c66ac9db | 2673 | |
a1d8b49a | 2674 | spin_unlock_irqrestore(&cmd->t_state_lock, |
c66ac9db | 2675 | cmd_flags); |
f7113a47 | 2676 | transport_cmd_check_stop(cmd, false); |
a1d8b49a | 2677 | complete(&cmd->transport_lun_fe_stop_comp); |
c66ac9db NB |
2678 | spin_lock_irqsave(&lun->lun_cmd_lock, lun_flags); |
2679 | continue; | |
2680 | } | |
6708bb27 | 2681 | pr_debug("SE_LUN[%d] - ITT: 0x%08x finished processing\n", |
e3d6f909 | 2682 | lun->unpacked_lun, cmd->se_tfo->get_task_tag(cmd)); |
c66ac9db | 2683 | |
a1d8b49a | 2684 | spin_unlock_irqrestore(&cmd->t_state_lock, cmd_flags); |
c66ac9db NB |
2685 | spin_lock_irqsave(&lun->lun_cmd_lock, lun_flags); |
2686 | } | |
2687 | spin_unlock_irqrestore(&lun->lun_cmd_lock, lun_flags); | |
2688 | } | |
2689 | ||
2690 | static int transport_clear_lun_thread(void *p) | |
2691 | { | |
8359cf43 | 2692 | struct se_lun *lun = p; |
c66ac9db NB |
2693 | |
2694 | __transport_clear_lun_from_sessions(lun); | |
2695 | complete(&lun->lun_shutdown_comp); | |
2696 | ||
2697 | return 0; | |
2698 | } | |
2699 | ||
2700 | int transport_clear_lun_from_sessions(struct se_lun *lun) | |
2701 | { | |
2702 | struct task_struct *kt; | |
2703 | ||
5951146d | 2704 | kt = kthread_run(transport_clear_lun_thread, lun, |
c66ac9db NB |
2705 | "tcm_cl_%u", lun->unpacked_lun); |
2706 | if (IS_ERR(kt)) { | |
6708bb27 | 2707 | pr_err("Unable to start clear_lun thread\n"); |
e3d6f909 | 2708 | return PTR_ERR(kt); |
c66ac9db NB |
2709 | } |
2710 | wait_for_completion(&lun->lun_shutdown_comp); | |
2711 | ||
2712 | return 0; | |
2713 | } | |
2714 | ||
d14921d6 NB |
2715 | /** |
2716 | * transport_wait_for_tasks - wait for completion to occur | |
2717 | * @cmd: command to wait | |
c66ac9db | 2718 | * |
d14921d6 NB |
2719 | * Called from frontend fabric context to wait for storage engine |
2720 | * to pause and/or release frontend generated struct se_cmd. | |
c66ac9db | 2721 | */ |
a17f091d | 2722 | bool transport_wait_for_tasks(struct se_cmd *cmd) |
c66ac9db NB |
2723 | { |
2724 | unsigned long flags; | |
2725 | ||
a1d8b49a | 2726 | spin_lock_irqsave(&cmd->t_state_lock, flags); |
c8e31f26 AG |
2727 | if (!(cmd->se_cmd_flags & SCF_SE_LUN_CMD) && |
2728 | !(cmd->se_cmd_flags & SCF_SCSI_TMR_CDB)) { | |
d14921d6 | 2729 | spin_unlock_irqrestore(&cmd->t_state_lock, flags); |
a17f091d | 2730 | return false; |
d14921d6 | 2731 | } |
cb4f4d3c | 2732 | |
c8e31f26 AG |
2733 | if (!(cmd->se_cmd_flags & SCF_SUPPORTED_SAM_OPCODE) && |
2734 | !(cmd->se_cmd_flags & SCF_SCSI_TMR_CDB)) { | |
d14921d6 | 2735 | spin_unlock_irqrestore(&cmd->t_state_lock, flags); |
a17f091d | 2736 | return false; |
d14921d6 | 2737 | } |
c66ac9db NB |
2738 | /* |
2739 | * If we are already stopped due to an external event (ie: LUN shutdown) | |
2740 | * sleep until the connection can have the passed struct se_cmd back. | |
a1d8b49a | 2741 | * The cmd->transport_lun_stopped_sem will be upped by |
c66ac9db NB |
2742 | * transport_clear_lun_from_sessions() once the ConfigFS context caller |
2743 | * has completed its operation on the struct se_cmd. | |
2744 | */ | |
7d680f3b | 2745 | if (cmd->transport_state & CMD_T_LUN_STOP) { |
6708bb27 | 2746 | pr_debug("wait_for_tasks: Stopping" |
e3d6f909 | 2747 | " wait_for_completion(&cmd->t_tasktransport_lun_fe" |
c66ac9db | 2748 | "_stop_comp); for ITT: 0x%08x\n", |
e3d6f909 | 2749 | cmd->se_tfo->get_task_tag(cmd)); |
c66ac9db NB |
2750 | /* |
2751 | * There is a special case for WRITES where a FE exception + | |
2752 | * LUN shutdown means ConfigFS context is still sleeping on | |
2753 | * transport_lun_stop_comp in transport_lun_wait_for_tasks(). | |
2754 | * We go ahead and up transport_lun_stop_comp just to be sure | |
2755 | * here. | |
2756 | */ | |
a1d8b49a AG |
2757 | spin_unlock_irqrestore(&cmd->t_state_lock, flags); |
2758 | complete(&cmd->transport_lun_stop_comp); | |
2759 | wait_for_completion(&cmd->transport_lun_fe_stop_comp); | |
2760 | spin_lock_irqsave(&cmd->t_state_lock, flags); | |
c66ac9db | 2761 | |
cf572a96 | 2762 | target_remove_from_state_list(cmd); |
c66ac9db NB |
2763 | /* |
2764 | * At this point, the frontend who was the originator of this | |
2765 | * struct se_cmd, now owns the structure and can be released through | |
2766 | * normal means below. | |
2767 | */ | |
6708bb27 | 2768 | pr_debug("wait_for_tasks: Stopped" |
e3d6f909 | 2769 | " wait_for_completion(&cmd->t_tasktransport_lun_fe_" |
c66ac9db | 2770 | "stop_comp); for ITT: 0x%08x\n", |
e3d6f909 | 2771 | cmd->se_tfo->get_task_tag(cmd)); |
c66ac9db | 2772 | |
7d680f3b | 2773 | cmd->transport_state &= ~CMD_T_LUN_STOP; |
c66ac9db | 2774 | } |
7d680f3b | 2775 | |
3d28934a | 2776 | if (!(cmd->transport_state & CMD_T_ACTIVE)) { |
d14921d6 | 2777 | spin_unlock_irqrestore(&cmd->t_state_lock, flags); |
a17f091d | 2778 | return false; |
d14921d6 | 2779 | } |
c66ac9db | 2780 | |
7d680f3b | 2781 | cmd->transport_state |= CMD_T_STOP; |
c66ac9db | 2782 | |
6708bb27 | 2783 | pr_debug("wait_for_tasks: Stopping %p ITT: 0x%08x" |
7d680f3b | 2784 | " i_state: %d, t_state: %d, CMD_T_STOP\n", |
f2da9dbd CH |
2785 | cmd, cmd->se_tfo->get_task_tag(cmd), |
2786 | cmd->se_tfo->get_cmd_state(cmd), cmd->t_state); | |
c66ac9db | 2787 | |
a1d8b49a | 2788 | spin_unlock_irqrestore(&cmd->t_state_lock, flags); |
c66ac9db | 2789 | |
a1d8b49a | 2790 | wait_for_completion(&cmd->t_transport_stop_comp); |
c66ac9db | 2791 | |
a1d8b49a | 2792 | spin_lock_irqsave(&cmd->t_state_lock, flags); |
7d680f3b | 2793 | cmd->transport_state &= ~(CMD_T_ACTIVE | CMD_T_STOP); |
c66ac9db | 2794 | |
6708bb27 | 2795 | pr_debug("wait_for_tasks: Stopped wait_for_compltion(" |
a1d8b49a | 2796 | "&cmd->t_transport_stop_comp) for ITT: 0x%08x\n", |
e3d6f909 | 2797 | cmd->se_tfo->get_task_tag(cmd)); |
c66ac9db | 2798 | |
d14921d6 | 2799 | spin_unlock_irqrestore(&cmd->t_state_lock, flags); |
a17f091d NB |
2800 | |
2801 | return true; | |
c66ac9db | 2802 | } |
d14921d6 | 2803 | EXPORT_SYMBOL(transport_wait_for_tasks); |
c66ac9db NB |
2804 | |
2805 | static int transport_get_sense_codes( | |
2806 | struct se_cmd *cmd, | |
2807 | u8 *asc, | |
2808 | u8 *ascq) | |
2809 | { | |
2810 | *asc = cmd->scsi_asc; | |
2811 | *ascq = cmd->scsi_ascq; | |
2812 | ||
2813 | return 0; | |
2814 | } | |
2815 | ||
2816 | static int transport_set_sense_codes( | |
2817 | struct se_cmd *cmd, | |
2818 | u8 asc, | |
2819 | u8 ascq) | |
2820 | { | |
2821 | cmd->scsi_asc = asc; | |
2822 | cmd->scsi_ascq = ascq; | |
2823 | ||
2824 | return 0; | |
2825 | } | |
2826 | ||
2827 | int transport_send_check_condition_and_sense( | |
2828 | struct se_cmd *cmd, | |
2829 | u8 reason, | |
2830 | int from_transport) | |
2831 | { | |
2832 | unsigned char *buffer = cmd->sense_buffer; | |
2833 | unsigned long flags; | |
2834 | int offset; | |
2835 | u8 asc = 0, ascq = 0; | |
2836 | ||
a1d8b49a | 2837 | spin_lock_irqsave(&cmd->t_state_lock, flags); |
c66ac9db | 2838 | if (cmd->se_cmd_flags & SCF_SENT_CHECK_CONDITION) { |
a1d8b49a | 2839 | spin_unlock_irqrestore(&cmd->t_state_lock, flags); |
c66ac9db NB |
2840 | return 0; |
2841 | } | |
2842 | cmd->se_cmd_flags |= SCF_SENT_CHECK_CONDITION; | |
a1d8b49a | 2843 | spin_unlock_irqrestore(&cmd->t_state_lock, flags); |
c66ac9db NB |
2844 | |
2845 | if (!reason && from_transport) | |
2846 | goto after_reason; | |
2847 | ||
2848 | if (!from_transport) | |
2849 | cmd->se_cmd_flags |= SCF_EMULATED_TASK_SENSE; | |
2850 | /* | |
2851 | * Data Segment and SenseLength of the fabric response PDU. | |
2852 | * | |
2853 | * TRANSPORT_SENSE_BUFFER is now set to SCSI_SENSE_BUFFERSIZE | |
2854 | * from include/scsi/scsi_cmnd.h | |
2855 | */ | |
e3d6f909 | 2856 | offset = cmd->se_tfo->set_fabric_sense_len(cmd, |
c66ac9db NB |
2857 | TRANSPORT_SENSE_BUFFER); |
2858 | /* | |
2859 | * Actual SENSE DATA, see SPC-3 7.23.2 SPC_SENSE_KEY_OFFSET uses | |
2860 | * SENSE KEY values from include/scsi/scsi.h | |
2861 | */ | |
2862 | switch (reason) { | |
2863 | case TCM_NON_EXISTENT_LUN: | |
eb39d340 NB |
2864 | /* CURRENT ERROR */ |
2865 | buffer[offset] = 0x70; | |
895f3022 | 2866 | buffer[offset+SPC_ADD_SENSE_LEN_OFFSET] = 10; |
eb39d340 NB |
2867 | /* ILLEGAL REQUEST */ |
2868 | buffer[offset+SPC_SENSE_KEY_OFFSET] = ILLEGAL_REQUEST; | |
2869 | /* LOGICAL UNIT NOT SUPPORTED */ | |
2870 | buffer[offset+SPC_ASC_KEY_OFFSET] = 0x25; | |
2871 | break; | |
c66ac9db NB |
2872 | case TCM_UNSUPPORTED_SCSI_OPCODE: |
2873 | case TCM_SECTOR_COUNT_TOO_MANY: | |
2874 | /* CURRENT ERROR */ | |
2875 | buffer[offset] = 0x70; | |
895f3022 | 2876 | buffer[offset+SPC_ADD_SENSE_LEN_OFFSET] = 10; |
c66ac9db NB |
2877 | /* ILLEGAL REQUEST */ |
2878 | buffer[offset+SPC_SENSE_KEY_OFFSET] = ILLEGAL_REQUEST; | |
2879 | /* INVALID COMMAND OPERATION CODE */ | |
2880 | buffer[offset+SPC_ASC_KEY_OFFSET] = 0x20; | |
2881 | break; | |
2882 | case TCM_UNKNOWN_MODE_PAGE: | |
2883 | /* CURRENT ERROR */ | |
2884 | buffer[offset] = 0x70; | |
895f3022 | 2885 | buffer[offset+SPC_ADD_SENSE_LEN_OFFSET] = 10; |
c66ac9db NB |
2886 | /* ILLEGAL REQUEST */ |
2887 | buffer[offset+SPC_SENSE_KEY_OFFSET] = ILLEGAL_REQUEST; | |
2888 | /* INVALID FIELD IN CDB */ | |
2889 | buffer[offset+SPC_ASC_KEY_OFFSET] = 0x24; | |
2890 | break; | |
2891 | case TCM_CHECK_CONDITION_ABORT_CMD: | |
2892 | /* CURRENT ERROR */ | |
2893 | buffer[offset] = 0x70; | |
895f3022 | 2894 | buffer[offset+SPC_ADD_SENSE_LEN_OFFSET] = 10; |
c66ac9db NB |
2895 | /* ABORTED COMMAND */ |
2896 | buffer[offset+SPC_SENSE_KEY_OFFSET] = ABORTED_COMMAND; | |
2897 | /* BUS DEVICE RESET FUNCTION OCCURRED */ | |
2898 | buffer[offset+SPC_ASC_KEY_OFFSET] = 0x29; | |
2899 | buffer[offset+SPC_ASCQ_KEY_OFFSET] = 0x03; | |
2900 | break; | |
2901 | case TCM_INCORRECT_AMOUNT_OF_DATA: | |
2902 | /* CURRENT ERROR */ | |
2903 | buffer[offset] = 0x70; | |
895f3022 | 2904 | buffer[offset+SPC_ADD_SENSE_LEN_OFFSET] = 10; |
c66ac9db NB |
2905 | /* ABORTED COMMAND */ |
2906 | buffer[offset+SPC_SENSE_KEY_OFFSET] = ABORTED_COMMAND; | |
2907 | /* WRITE ERROR */ | |
2908 | buffer[offset+SPC_ASC_KEY_OFFSET] = 0x0c; | |
2909 | /* NOT ENOUGH UNSOLICITED DATA */ | |
2910 | buffer[offset+SPC_ASCQ_KEY_OFFSET] = 0x0d; | |
2911 | break; | |
2912 | case TCM_INVALID_CDB_FIELD: | |
2913 | /* CURRENT ERROR */ | |
2914 | buffer[offset] = 0x70; | |
895f3022 | 2915 | buffer[offset+SPC_ADD_SENSE_LEN_OFFSET] = 10; |
9fbc8909 RD |
2916 | /* ILLEGAL REQUEST */ |
2917 | buffer[offset+SPC_SENSE_KEY_OFFSET] = ILLEGAL_REQUEST; | |
c66ac9db NB |
2918 | /* INVALID FIELD IN CDB */ |
2919 | buffer[offset+SPC_ASC_KEY_OFFSET] = 0x24; | |
2920 | break; | |
2921 | case TCM_INVALID_PARAMETER_LIST: | |
2922 | /* CURRENT ERROR */ | |
2923 | buffer[offset] = 0x70; | |
895f3022 | 2924 | buffer[offset+SPC_ADD_SENSE_LEN_OFFSET] = 10; |
9fbc8909 RD |
2925 | /* ILLEGAL REQUEST */ |
2926 | buffer[offset+SPC_SENSE_KEY_OFFSET] = ILLEGAL_REQUEST; | |
c66ac9db NB |
2927 | /* INVALID FIELD IN PARAMETER LIST */ |
2928 | buffer[offset+SPC_ASC_KEY_OFFSET] = 0x26; | |
2929 | break; | |
2930 | case TCM_UNEXPECTED_UNSOLICITED_DATA: | |
2931 | /* CURRENT ERROR */ | |
2932 | buffer[offset] = 0x70; | |
895f3022 | 2933 | buffer[offset+SPC_ADD_SENSE_LEN_OFFSET] = 10; |
c66ac9db NB |
2934 | /* ABORTED COMMAND */ |
2935 | buffer[offset+SPC_SENSE_KEY_OFFSET] = ABORTED_COMMAND; | |
2936 | /* WRITE ERROR */ | |
2937 | buffer[offset+SPC_ASC_KEY_OFFSET] = 0x0c; | |
2938 | /* UNEXPECTED_UNSOLICITED_DATA */ | |
2939 | buffer[offset+SPC_ASCQ_KEY_OFFSET] = 0x0c; | |
2940 | break; | |
2941 | case TCM_SERVICE_CRC_ERROR: | |
2942 | /* CURRENT ERROR */ | |
2943 | buffer[offset] = 0x70; | |
895f3022 | 2944 | buffer[offset+SPC_ADD_SENSE_LEN_OFFSET] = 10; |
c66ac9db NB |
2945 | /* ABORTED COMMAND */ |
2946 | buffer[offset+SPC_SENSE_KEY_OFFSET] = ABORTED_COMMAND; | |
2947 | /* PROTOCOL SERVICE CRC ERROR */ | |
2948 | buffer[offset+SPC_ASC_KEY_OFFSET] = 0x47; | |
2949 | /* N/A */ | |
2950 | buffer[offset+SPC_ASCQ_KEY_OFFSET] = 0x05; | |
2951 | break; | |
2952 | case TCM_SNACK_REJECTED: | |
2953 | /* CURRENT ERROR */ | |
2954 | buffer[offset] = 0x70; | |
895f3022 | 2955 | buffer[offset+SPC_ADD_SENSE_LEN_OFFSET] = 10; |
c66ac9db NB |
2956 | /* ABORTED COMMAND */ |
2957 | buffer[offset+SPC_SENSE_KEY_OFFSET] = ABORTED_COMMAND; | |
2958 | /* READ ERROR */ | |
2959 | buffer[offset+SPC_ASC_KEY_OFFSET] = 0x11; | |
2960 | /* FAILED RETRANSMISSION REQUEST */ | |
2961 | buffer[offset+SPC_ASCQ_KEY_OFFSET] = 0x13; | |
2962 | break; | |
2963 | case TCM_WRITE_PROTECTED: | |
2964 | /* CURRENT ERROR */ | |
2965 | buffer[offset] = 0x70; | |
895f3022 | 2966 | buffer[offset+SPC_ADD_SENSE_LEN_OFFSET] = 10; |
c66ac9db NB |
2967 | /* DATA PROTECT */ |
2968 | buffer[offset+SPC_SENSE_KEY_OFFSET] = DATA_PROTECT; | |
2969 | /* WRITE PROTECTED */ | |
2970 | buffer[offset+SPC_ASC_KEY_OFFSET] = 0x27; | |
2971 | break; | |
2972 | case TCM_CHECK_CONDITION_UNIT_ATTENTION: | |
2973 | /* CURRENT ERROR */ | |
2974 | buffer[offset] = 0x70; | |
895f3022 | 2975 | buffer[offset+SPC_ADD_SENSE_LEN_OFFSET] = 10; |
c66ac9db NB |
2976 | /* UNIT ATTENTION */ |
2977 | buffer[offset+SPC_SENSE_KEY_OFFSET] = UNIT_ATTENTION; | |
2978 | core_scsi3_ua_for_check_condition(cmd, &asc, &ascq); | |
2979 | buffer[offset+SPC_ASC_KEY_OFFSET] = asc; | |
2980 | buffer[offset+SPC_ASCQ_KEY_OFFSET] = ascq; | |
2981 | break; | |
2982 | case TCM_CHECK_CONDITION_NOT_READY: | |
2983 | /* CURRENT ERROR */ | |
2984 | buffer[offset] = 0x70; | |
895f3022 | 2985 | buffer[offset+SPC_ADD_SENSE_LEN_OFFSET] = 10; |
c66ac9db NB |
2986 | /* Not Ready */ |
2987 | buffer[offset+SPC_SENSE_KEY_OFFSET] = NOT_READY; | |
2988 | transport_get_sense_codes(cmd, &asc, &ascq); | |
2989 | buffer[offset+SPC_ASC_KEY_OFFSET] = asc; | |
2990 | buffer[offset+SPC_ASCQ_KEY_OFFSET] = ascq; | |
2991 | break; | |
2992 | case TCM_LOGICAL_UNIT_COMMUNICATION_FAILURE: | |
2993 | default: | |
2994 | /* CURRENT ERROR */ | |
2995 | buffer[offset] = 0x70; | |
895f3022 | 2996 | buffer[offset+SPC_ADD_SENSE_LEN_OFFSET] = 10; |
c66ac9db NB |
2997 | /* ILLEGAL REQUEST */ |
2998 | buffer[offset+SPC_SENSE_KEY_OFFSET] = ILLEGAL_REQUEST; | |
2999 | /* LOGICAL UNIT COMMUNICATION FAILURE */ | |
3000 | buffer[offset+SPC_ASC_KEY_OFFSET] = 0x80; | |
3001 | break; | |
3002 | } | |
3003 | /* | |
3004 | * This code uses linux/include/scsi/scsi.h SAM status codes! | |
3005 | */ | |
3006 | cmd->scsi_status = SAM_STAT_CHECK_CONDITION; | |
3007 | /* | |
3008 | * Automatically padded, this value is encoded in the fabric's | |
3009 | * data_length response PDU containing the SCSI defined sense data. | |
3010 | */ | |
3011 | cmd->scsi_sense_length = TRANSPORT_SENSE_BUFFER + offset; | |
3012 | ||
3013 | after_reason: | |
07bde79a | 3014 | return cmd->se_tfo->queue_status(cmd); |
c66ac9db NB |
3015 | } |
3016 | EXPORT_SYMBOL(transport_send_check_condition_and_sense); | |
3017 | ||
3018 | int transport_check_aborted_status(struct se_cmd *cmd, int send_status) | |
3019 | { | |
3020 | int ret = 0; | |
3021 | ||
7d680f3b | 3022 | if (cmd->transport_state & CMD_T_ABORTED) { |
6708bb27 | 3023 | if (!send_status || |
c66ac9db NB |
3024 | (cmd->se_cmd_flags & SCF_SENT_DELAYED_TAS)) |
3025 | return 1; | |
8b1e1244 | 3026 | |
6708bb27 | 3027 | pr_debug("Sending delayed SAM_STAT_TASK_ABORTED" |
c66ac9db | 3028 | " status for CDB: 0x%02x ITT: 0x%08x\n", |
a1d8b49a | 3029 | cmd->t_task_cdb[0], |
e3d6f909 | 3030 | cmd->se_tfo->get_task_tag(cmd)); |
8b1e1244 | 3031 | |
c66ac9db | 3032 | cmd->se_cmd_flags |= SCF_SENT_DELAYED_TAS; |
e3d6f909 | 3033 | cmd->se_tfo->queue_status(cmd); |
c66ac9db NB |
3034 | ret = 1; |
3035 | } | |
3036 | return ret; | |
3037 | } | |
3038 | EXPORT_SYMBOL(transport_check_aborted_status); | |
3039 | ||
3040 | void transport_send_task_abort(struct se_cmd *cmd) | |
3041 | { | |
c252f003 NB |
3042 | unsigned long flags; |
3043 | ||
3044 | spin_lock_irqsave(&cmd->t_state_lock, flags); | |
3045 | if (cmd->se_cmd_flags & SCF_SENT_CHECK_CONDITION) { | |
3046 | spin_unlock_irqrestore(&cmd->t_state_lock, flags); | |
3047 | return; | |
3048 | } | |
3049 | spin_unlock_irqrestore(&cmd->t_state_lock, flags); | |
3050 | ||
c66ac9db NB |
3051 | /* |
3052 | * If there are still expected incoming fabric WRITEs, we wait | |
3053 | * until until they have completed before sending a TASK_ABORTED | |
3054 | * response. This response with TASK_ABORTED status will be | |
3055 | * queued back to fabric module by transport_check_aborted_status(). | |
3056 | */ | |
3057 | if (cmd->data_direction == DMA_TO_DEVICE) { | |
e3d6f909 | 3058 | if (cmd->se_tfo->write_pending_status(cmd) != 0) { |
7d680f3b | 3059 | cmd->transport_state |= CMD_T_ABORTED; |
c66ac9db | 3060 | smp_mb__after_atomic_inc(); |
c66ac9db NB |
3061 | } |
3062 | } | |
3063 | cmd->scsi_status = SAM_STAT_TASK_ABORTED; | |
8b1e1244 | 3064 | |
6708bb27 | 3065 | pr_debug("Setting SAM_STAT_TASK_ABORTED status for CDB: 0x%02x," |
a1d8b49a | 3066 | " ITT: 0x%08x\n", cmd->t_task_cdb[0], |
e3d6f909 | 3067 | cmd->se_tfo->get_task_tag(cmd)); |
8b1e1244 | 3068 | |
e3d6f909 | 3069 | cmd->se_tfo->queue_status(cmd); |
c66ac9db NB |
3070 | } |
3071 | ||
af877292 | 3072 | static void target_tmr_work(struct work_struct *work) |
c66ac9db | 3073 | { |
af877292 | 3074 | struct se_cmd *cmd = container_of(work, struct se_cmd, work); |
5951146d | 3075 | struct se_device *dev = cmd->se_dev; |
c66ac9db NB |
3076 | struct se_tmr_req *tmr = cmd->se_tmr_req; |
3077 | int ret; | |
3078 | ||
3079 | switch (tmr->function) { | |
5c6cd613 | 3080 | case TMR_ABORT_TASK: |
3d28934a | 3081 | core_tmr_abort_task(dev, tmr, cmd->se_sess); |
c66ac9db | 3082 | break; |
5c6cd613 NB |
3083 | case TMR_ABORT_TASK_SET: |
3084 | case TMR_CLEAR_ACA: | |
3085 | case TMR_CLEAR_TASK_SET: | |
c66ac9db NB |
3086 | tmr->response = TMR_TASK_MGMT_FUNCTION_NOT_SUPPORTED; |
3087 | break; | |
5c6cd613 | 3088 | case TMR_LUN_RESET: |
c66ac9db NB |
3089 | ret = core_tmr_lun_reset(dev, tmr, NULL, NULL); |
3090 | tmr->response = (!ret) ? TMR_FUNCTION_COMPLETE : | |
3091 | TMR_FUNCTION_REJECTED; | |
3092 | break; | |
5c6cd613 | 3093 | case TMR_TARGET_WARM_RESET: |
c66ac9db NB |
3094 | tmr->response = TMR_FUNCTION_REJECTED; |
3095 | break; | |
5c6cd613 | 3096 | case TMR_TARGET_COLD_RESET: |
c66ac9db NB |
3097 | tmr->response = TMR_FUNCTION_REJECTED; |
3098 | break; | |
c66ac9db | 3099 | default: |
6708bb27 | 3100 | pr_err("Uknown TMR function: 0x%02x.\n", |
c66ac9db NB |
3101 | tmr->function); |
3102 | tmr->response = TMR_FUNCTION_REJECTED; | |
3103 | break; | |
3104 | } | |
3105 | ||
3106 | cmd->t_state = TRANSPORT_ISTATE_PROCESSING; | |
e3d6f909 | 3107 | cmd->se_tfo->queue_tm_rsp(cmd); |
c66ac9db | 3108 | |
b7b8bef7 | 3109 | transport_cmd_check_stop_to_fabric(cmd); |
c66ac9db NB |
3110 | } |
3111 | ||
af877292 CH |
3112 | int transport_generic_handle_tmr( |
3113 | struct se_cmd *cmd) | |
c66ac9db | 3114 | { |
af877292 CH |
3115 | INIT_WORK(&cmd->work, target_tmr_work); |
3116 | queue_work(cmd->se_dev->tmr_wq, &cmd->work); | |
c66ac9db NB |
3117 | return 0; |
3118 | } | |
af877292 | 3119 | EXPORT_SYMBOL(transport_generic_handle_tmr); |