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c66ac9db NB |
1 | /******************************************************************************* |
2 | * Filename: target_core_transport.c | |
3 | * | |
4 | * This file contains the Generic Target Engine Core. | |
5 | * | |
fd9a11d7 | 6 | * (c) Copyright 2002-2012 RisingTide Systems LLC. |
c66ac9db NB |
7 | * |
8 | * Nicholas A. Bellinger <nab@kernel.org> | |
9 | * | |
10 | * This program is free software; you can redistribute it and/or modify | |
11 | * it under the terms of the GNU General Public License as published by | |
12 | * the Free Software Foundation; either version 2 of the License, or | |
13 | * (at your option) any later version. | |
14 | * | |
15 | * This program is distributed in the hope that it will be useful, | |
16 | * but WITHOUT ANY WARRANTY; without even the implied warranty of | |
17 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
18 | * GNU General Public License for more details. | |
19 | * | |
20 | * You should have received a copy of the GNU General Public License | |
21 | * along with this program; if not, write to the Free Software | |
22 | * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. | |
23 | * | |
24 | ******************************************************************************/ | |
25 | ||
c66ac9db NB |
26 | #include <linux/net.h> |
27 | #include <linux/delay.h> | |
28 | #include <linux/string.h> | |
29 | #include <linux/timer.h> | |
30 | #include <linux/slab.h> | |
31 | #include <linux/blkdev.h> | |
32 | #include <linux/spinlock.h> | |
c66ac9db NB |
33 | #include <linux/kthread.h> |
34 | #include <linux/in.h> | |
35 | #include <linux/cdrom.h> | |
827509e3 | 36 | #include <linux/module.h> |
015487b8 | 37 | #include <linux/ratelimit.h> |
c66ac9db NB |
38 | #include <asm/unaligned.h> |
39 | #include <net/sock.h> | |
40 | #include <net/tcp.h> | |
41 | #include <scsi/scsi.h> | |
42 | #include <scsi/scsi_cmnd.h> | |
e66ecd50 | 43 | #include <scsi/scsi_tcq.h> |
c66ac9db NB |
44 | |
45 | #include <target/target_core_base.h> | |
c4795fb2 CH |
46 | #include <target/target_core_backend.h> |
47 | #include <target/target_core_fabric.h> | |
c66ac9db NB |
48 | #include <target/target_core_configfs.h> |
49 | ||
e26d99ae | 50 | #include "target_core_internal.h" |
c66ac9db | 51 | #include "target_core_alua.h" |
c66ac9db | 52 | #include "target_core_pr.h" |
c66ac9db NB |
53 | #include "target_core_ua.h" |
54 | ||
35e0e757 | 55 | static struct workqueue_struct *target_completion_wq; |
c66ac9db | 56 | static struct kmem_cache *se_sess_cache; |
c66ac9db | 57 | struct kmem_cache *se_ua_cache; |
c66ac9db NB |
58 | struct kmem_cache *t10_pr_reg_cache; |
59 | struct kmem_cache *t10_alua_lu_gp_cache; | |
60 | struct kmem_cache *t10_alua_lu_gp_mem_cache; | |
61 | struct kmem_cache *t10_alua_tg_pt_gp_cache; | |
62 | struct kmem_cache *t10_alua_tg_pt_gp_mem_cache; | |
63 | ||
c66ac9db | 64 | static void transport_complete_task_attr(struct se_cmd *cmd); |
07bde79a | 65 | static void transport_handle_queue_full(struct se_cmd *cmd, |
e057f533 | 66 | struct se_device *dev); |
05d1c7c0 | 67 | static int transport_generic_get_mem(struct se_cmd *cmd); |
bc187ea6 | 68 | static int target_get_sess_cmd(struct se_session *, struct se_cmd *, bool); |
39c05f32 | 69 | static void transport_put_cmd(struct se_cmd *cmd); |
35e0e757 | 70 | static void target_complete_ok_work(struct work_struct *work); |
c66ac9db | 71 | |
e3d6f909 | 72 | int init_se_kmem_caches(void) |
c66ac9db | 73 | { |
c66ac9db NB |
74 | se_sess_cache = kmem_cache_create("se_sess_cache", |
75 | sizeof(struct se_session), __alignof__(struct se_session), | |
76 | 0, NULL); | |
6708bb27 AG |
77 | if (!se_sess_cache) { |
78 | pr_err("kmem_cache_create() for struct se_session" | |
c66ac9db | 79 | " failed\n"); |
c8e31f26 | 80 | goto out; |
c66ac9db NB |
81 | } |
82 | se_ua_cache = kmem_cache_create("se_ua_cache", | |
83 | sizeof(struct se_ua), __alignof__(struct se_ua), | |
84 | 0, NULL); | |
6708bb27 AG |
85 | if (!se_ua_cache) { |
86 | pr_err("kmem_cache_create() for struct se_ua failed\n"); | |
35e0e757 | 87 | goto out_free_sess_cache; |
c66ac9db | 88 | } |
c66ac9db NB |
89 | t10_pr_reg_cache = kmem_cache_create("t10_pr_reg_cache", |
90 | sizeof(struct t10_pr_registration), | |
91 | __alignof__(struct t10_pr_registration), 0, NULL); | |
6708bb27 AG |
92 | if (!t10_pr_reg_cache) { |
93 | pr_err("kmem_cache_create() for struct t10_pr_registration" | |
c66ac9db | 94 | " failed\n"); |
35e0e757 | 95 | goto out_free_ua_cache; |
c66ac9db NB |
96 | } |
97 | t10_alua_lu_gp_cache = kmem_cache_create("t10_alua_lu_gp_cache", | |
98 | sizeof(struct t10_alua_lu_gp), __alignof__(struct t10_alua_lu_gp), | |
99 | 0, NULL); | |
6708bb27 AG |
100 | if (!t10_alua_lu_gp_cache) { |
101 | pr_err("kmem_cache_create() for t10_alua_lu_gp_cache" | |
c66ac9db | 102 | " failed\n"); |
35e0e757 | 103 | goto out_free_pr_reg_cache; |
c66ac9db NB |
104 | } |
105 | t10_alua_lu_gp_mem_cache = kmem_cache_create("t10_alua_lu_gp_mem_cache", | |
106 | sizeof(struct t10_alua_lu_gp_member), | |
107 | __alignof__(struct t10_alua_lu_gp_member), 0, NULL); | |
6708bb27 AG |
108 | if (!t10_alua_lu_gp_mem_cache) { |
109 | pr_err("kmem_cache_create() for t10_alua_lu_gp_mem_" | |
c66ac9db | 110 | "cache failed\n"); |
35e0e757 | 111 | goto out_free_lu_gp_cache; |
c66ac9db NB |
112 | } |
113 | t10_alua_tg_pt_gp_cache = kmem_cache_create("t10_alua_tg_pt_gp_cache", | |
114 | sizeof(struct t10_alua_tg_pt_gp), | |
115 | __alignof__(struct t10_alua_tg_pt_gp), 0, NULL); | |
6708bb27 AG |
116 | if (!t10_alua_tg_pt_gp_cache) { |
117 | pr_err("kmem_cache_create() for t10_alua_tg_pt_gp_" | |
c66ac9db | 118 | "cache failed\n"); |
35e0e757 | 119 | goto out_free_lu_gp_mem_cache; |
c66ac9db NB |
120 | } |
121 | t10_alua_tg_pt_gp_mem_cache = kmem_cache_create( | |
122 | "t10_alua_tg_pt_gp_mem_cache", | |
123 | sizeof(struct t10_alua_tg_pt_gp_member), | |
124 | __alignof__(struct t10_alua_tg_pt_gp_member), | |
125 | 0, NULL); | |
6708bb27 AG |
126 | if (!t10_alua_tg_pt_gp_mem_cache) { |
127 | pr_err("kmem_cache_create() for t10_alua_tg_pt_gp_" | |
c66ac9db | 128 | "mem_t failed\n"); |
35e0e757 | 129 | goto out_free_tg_pt_gp_cache; |
c66ac9db NB |
130 | } |
131 | ||
35e0e757 CH |
132 | target_completion_wq = alloc_workqueue("target_completion", |
133 | WQ_MEM_RECLAIM, 0); | |
134 | if (!target_completion_wq) | |
135 | goto out_free_tg_pt_gp_mem_cache; | |
136 | ||
c66ac9db | 137 | return 0; |
35e0e757 CH |
138 | |
139 | out_free_tg_pt_gp_mem_cache: | |
140 | kmem_cache_destroy(t10_alua_tg_pt_gp_mem_cache); | |
141 | out_free_tg_pt_gp_cache: | |
142 | kmem_cache_destroy(t10_alua_tg_pt_gp_cache); | |
143 | out_free_lu_gp_mem_cache: | |
144 | kmem_cache_destroy(t10_alua_lu_gp_mem_cache); | |
145 | out_free_lu_gp_cache: | |
146 | kmem_cache_destroy(t10_alua_lu_gp_cache); | |
147 | out_free_pr_reg_cache: | |
148 | kmem_cache_destroy(t10_pr_reg_cache); | |
149 | out_free_ua_cache: | |
150 | kmem_cache_destroy(se_ua_cache); | |
151 | out_free_sess_cache: | |
152 | kmem_cache_destroy(se_sess_cache); | |
c66ac9db | 153 | out: |
e3d6f909 | 154 | return -ENOMEM; |
c66ac9db NB |
155 | } |
156 | ||
e3d6f909 | 157 | void release_se_kmem_caches(void) |
c66ac9db | 158 | { |
35e0e757 | 159 | destroy_workqueue(target_completion_wq); |
c66ac9db NB |
160 | kmem_cache_destroy(se_sess_cache); |
161 | kmem_cache_destroy(se_ua_cache); | |
c66ac9db NB |
162 | kmem_cache_destroy(t10_pr_reg_cache); |
163 | kmem_cache_destroy(t10_alua_lu_gp_cache); | |
164 | kmem_cache_destroy(t10_alua_lu_gp_mem_cache); | |
165 | kmem_cache_destroy(t10_alua_tg_pt_gp_cache); | |
166 | kmem_cache_destroy(t10_alua_tg_pt_gp_mem_cache); | |
c66ac9db NB |
167 | } |
168 | ||
e3d6f909 AG |
169 | /* This code ensures unique mib indexes are handed out. */ |
170 | static DEFINE_SPINLOCK(scsi_mib_index_lock); | |
171 | static u32 scsi_mib_index[SCSI_INDEX_TYPE_MAX]; | |
e89d15ee NB |
172 | |
173 | /* | |
174 | * Allocate a new row index for the entry type specified | |
175 | */ | |
176 | u32 scsi_get_new_index(scsi_index_t type) | |
177 | { | |
178 | u32 new_index; | |
179 | ||
e3d6f909 | 180 | BUG_ON((type < 0) || (type >= SCSI_INDEX_TYPE_MAX)); |
e89d15ee | 181 | |
e3d6f909 AG |
182 | spin_lock(&scsi_mib_index_lock); |
183 | new_index = ++scsi_mib_index[type]; | |
184 | spin_unlock(&scsi_mib_index_lock); | |
e89d15ee NB |
185 | |
186 | return new_index; | |
187 | } | |
188 | ||
dbc5623e | 189 | void transport_subsystem_check_init(void) |
c66ac9db NB |
190 | { |
191 | int ret; | |
283669d2 | 192 | static int sub_api_initialized; |
c66ac9db | 193 | |
dbc5623e NB |
194 | if (sub_api_initialized) |
195 | return; | |
196 | ||
c66ac9db NB |
197 | ret = request_module("target_core_iblock"); |
198 | if (ret != 0) | |
6708bb27 | 199 | pr_err("Unable to load target_core_iblock\n"); |
c66ac9db NB |
200 | |
201 | ret = request_module("target_core_file"); | |
202 | if (ret != 0) | |
6708bb27 | 203 | pr_err("Unable to load target_core_file\n"); |
c66ac9db NB |
204 | |
205 | ret = request_module("target_core_pscsi"); | |
206 | if (ret != 0) | |
6708bb27 | 207 | pr_err("Unable to load target_core_pscsi\n"); |
c66ac9db | 208 | |
e3d6f909 | 209 | sub_api_initialized = 1; |
c66ac9db NB |
210 | } |
211 | ||
212 | struct se_session *transport_init_session(void) | |
213 | { | |
214 | struct se_session *se_sess; | |
215 | ||
216 | se_sess = kmem_cache_zalloc(se_sess_cache, GFP_KERNEL); | |
6708bb27 AG |
217 | if (!se_sess) { |
218 | pr_err("Unable to allocate struct se_session from" | |
c66ac9db NB |
219 | " se_sess_cache\n"); |
220 | return ERR_PTR(-ENOMEM); | |
221 | } | |
222 | INIT_LIST_HEAD(&se_sess->sess_list); | |
223 | INIT_LIST_HEAD(&se_sess->sess_acl_list); | |
a17f091d | 224 | INIT_LIST_HEAD(&se_sess->sess_cmd_list); |
a17f091d | 225 | spin_lock_init(&se_sess->sess_cmd_lock); |
41ac82b6 | 226 | kref_init(&se_sess->sess_kref); |
c66ac9db NB |
227 | |
228 | return se_sess; | |
229 | } | |
230 | EXPORT_SYMBOL(transport_init_session); | |
231 | ||
232 | /* | |
140854cb | 233 | * Called with spin_lock_irqsave(&struct se_portal_group->session_lock called. |
c66ac9db NB |
234 | */ |
235 | void __transport_register_session( | |
236 | struct se_portal_group *se_tpg, | |
237 | struct se_node_acl *se_nacl, | |
238 | struct se_session *se_sess, | |
239 | void *fabric_sess_ptr) | |
240 | { | |
241 | unsigned char buf[PR_REG_ISID_LEN]; | |
242 | ||
243 | se_sess->se_tpg = se_tpg; | |
244 | se_sess->fabric_sess_ptr = fabric_sess_ptr; | |
245 | /* | |
246 | * Used by struct se_node_acl's under ConfigFS to locate active se_session-t | |
247 | * | |
248 | * Only set for struct se_session's that will actually be moving I/O. | |
249 | * eg: *NOT* discovery sessions. | |
250 | */ | |
251 | if (se_nacl) { | |
252 | /* | |
253 | * If the fabric module supports an ISID based TransportID, | |
254 | * save this value in binary from the fabric I_T Nexus now. | |
255 | */ | |
e3d6f909 | 256 | if (se_tpg->se_tpg_tfo->sess_get_initiator_sid != NULL) { |
c66ac9db | 257 | memset(&buf[0], 0, PR_REG_ISID_LEN); |
e3d6f909 | 258 | se_tpg->se_tpg_tfo->sess_get_initiator_sid(se_sess, |
c66ac9db NB |
259 | &buf[0], PR_REG_ISID_LEN); |
260 | se_sess->sess_bin_isid = get_unaligned_be64(&buf[0]); | |
261 | } | |
afb999ff NB |
262 | kref_get(&se_nacl->acl_kref); |
263 | ||
c66ac9db NB |
264 | spin_lock_irq(&se_nacl->nacl_sess_lock); |
265 | /* | |
266 | * The se_nacl->nacl_sess pointer will be set to the | |
267 | * last active I_T Nexus for each struct se_node_acl. | |
268 | */ | |
269 | se_nacl->nacl_sess = se_sess; | |
270 | ||
271 | list_add_tail(&se_sess->sess_acl_list, | |
272 | &se_nacl->acl_sess_list); | |
273 | spin_unlock_irq(&se_nacl->nacl_sess_lock); | |
274 | } | |
275 | list_add_tail(&se_sess->sess_list, &se_tpg->tpg_sess_list); | |
276 | ||
6708bb27 | 277 | pr_debug("TARGET_CORE[%s]: Registered fabric_sess_ptr: %p\n", |
e3d6f909 | 278 | se_tpg->se_tpg_tfo->get_fabric_name(), se_sess->fabric_sess_ptr); |
c66ac9db NB |
279 | } |
280 | EXPORT_SYMBOL(__transport_register_session); | |
281 | ||
282 | void transport_register_session( | |
283 | struct se_portal_group *se_tpg, | |
284 | struct se_node_acl *se_nacl, | |
285 | struct se_session *se_sess, | |
286 | void *fabric_sess_ptr) | |
287 | { | |
140854cb NB |
288 | unsigned long flags; |
289 | ||
290 | spin_lock_irqsave(&se_tpg->session_lock, flags); | |
c66ac9db | 291 | __transport_register_session(se_tpg, se_nacl, se_sess, fabric_sess_ptr); |
140854cb | 292 | spin_unlock_irqrestore(&se_tpg->session_lock, flags); |
c66ac9db NB |
293 | } |
294 | EXPORT_SYMBOL(transport_register_session); | |
295 | ||
ecf0dd66 | 296 | static void target_release_session(struct kref *kref) |
41ac82b6 NB |
297 | { |
298 | struct se_session *se_sess = container_of(kref, | |
299 | struct se_session, sess_kref); | |
300 | struct se_portal_group *se_tpg = se_sess->se_tpg; | |
301 | ||
302 | se_tpg->se_tpg_tfo->close_session(se_sess); | |
303 | } | |
304 | ||
305 | void target_get_session(struct se_session *se_sess) | |
306 | { | |
307 | kref_get(&se_sess->sess_kref); | |
308 | } | |
309 | EXPORT_SYMBOL(target_get_session); | |
310 | ||
33933a0e | 311 | void target_put_session(struct se_session *se_sess) |
41ac82b6 | 312 | { |
4149268e JE |
313 | struct se_portal_group *tpg = se_sess->se_tpg; |
314 | ||
315 | if (tpg->se_tpg_tfo->put_session != NULL) { | |
316 | tpg->se_tpg_tfo->put_session(se_sess); | |
317 | return; | |
318 | } | |
33933a0e | 319 | kref_put(&se_sess->sess_kref, target_release_session); |
41ac82b6 NB |
320 | } |
321 | EXPORT_SYMBOL(target_put_session); | |
322 | ||
afb999ff NB |
323 | static void target_complete_nacl(struct kref *kref) |
324 | { | |
325 | struct se_node_acl *nacl = container_of(kref, | |
326 | struct se_node_acl, acl_kref); | |
327 | ||
328 | complete(&nacl->acl_free_comp); | |
329 | } | |
330 | ||
331 | void target_put_nacl(struct se_node_acl *nacl) | |
332 | { | |
333 | kref_put(&nacl->acl_kref, target_complete_nacl); | |
334 | } | |
335 | ||
c66ac9db NB |
336 | void transport_deregister_session_configfs(struct se_session *se_sess) |
337 | { | |
338 | struct se_node_acl *se_nacl; | |
23388864 | 339 | unsigned long flags; |
c66ac9db NB |
340 | /* |
341 | * Used by struct se_node_acl's under ConfigFS to locate active struct se_session | |
342 | */ | |
343 | se_nacl = se_sess->se_node_acl; | |
6708bb27 | 344 | if (se_nacl) { |
23388864 | 345 | spin_lock_irqsave(&se_nacl->nacl_sess_lock, flags); |
337c0607 NB |
346 | if (se_nacl->acl_stop == 0) |
347 | list_del(&se_sess->sess_acl_list); | |
c66ac9db NB |
348 | /* |
349 | * If the session list is empty, then clear the pointer. | |
350 | * Otherwise, set the struct se_session pointer from the tail | |
351 | * element of the per struct se_node_acl active session list. | |
352 | */ | |
353 | if (list_empty(&se_nacl->acl_sess_list)) | |
354 | se_nacl->nacl_sess = NULL; | |
355 | else { | |
356 | se_nacl->nacl_sess = container_of( | |
357 | se_nacl->acl_sess_list.prev, | |
358 | struct se_session, sess_acl_list); | |
359 | } | |
23388864 | 360 | spin_unlock_irqrestore(&se_nacl->nacl_sess_lock, flags); |
c66ac9db NB |
361 | } |
362 | } | |
363 | EXPORT_SYMBOL(transport_deregister_session_configfs); | |
364 | ||
365 | void transport_free_session(struct se_session *se_sess) | |
366 | { | |
367 | kmem_cache_free(se_sess_cache, se_sess); | |
368 | } | |
369 | EXPORT_SYMBOL(transport_free_session); | |
370 | ||
371 | void transport_deregister_session(struct se_session *se_sess) | |
372 | { | |
373 | struct se_portal_group *se_tpg = se_sess->se_tpg; | |
01468346 | 374 | struct target_core_fabric_ops *se_tfo; |
c66ac9db | 375 | struct se_node_acl *se_nacl; |
e63a8e19 | 376 | unsigned long flags; |
01468346 | 377 | bool comp_nacl = true; |
c66ac9db | 378 | |
6708bb27 | 379 | if (!se_tpg) { |
c66ac9db NB |
380 | transport_free_session(se_sess); |
381 | return; | |
382 | } | |
01468346 | 383 | se_tfo = se_tpg->se_tpg_tfo; |
c66ac9db | 384 | |
e63a8e19 | 385 | spin_lock_irqsave(&se_tpg->session_lock, flags); |
c66ac9db NB |
386 | list_del(&se_sess->sess_list); |
387 | se_sess->se_tpg = NULL; | |
388 | se_sess->fabric_sess_ptr = NULL; | |
e63a8e19 | 389 | spin_unlock_irqrestore(&se_tpg->session_lock, flags); |
c66ac9db NB |
390 | |
391 | /* | |
392 | * Determine if we need to do extra work for this initiator node's | |
393 | * struct se_node_acl if it had been previously dynamically generated. | |
394 | */ | |
395 | se_nacl = se_sess->se_node_acl; | |
01468346 NB |
396 | |
397 | spin_lock_irqsave(&se_tpg->acl_node_lock, flags); | |
398 | if (se_nacl && se_nacl->dynamic_node_acl) { | |
399 | if (!se_tfo->tpg_check_demo_mode_cache(se_tpg)) { | |
400 | list_del(&se_nacl->acl_list); | |
401 | se_tpg->num_node_acls--; | |
402 | spin_unlock_irqrestore(&se_tpg->acl_node_lock, flags); | |
403 | core_tpg_wait_for_nacl_pr_ref(se_nacl); | |
404 | core_free_device_list_for_node(se_nacl, se_tpg); | |
405 | se_tfo->tpg_release_fabric_acl(se_tpg, se_nacl); | |
406 | ||
407 | comp_nacl = false; | |
408 | spin_lock_irqsave(&se_tpg->acl_node_lock, flags); | |
c66ac9db | 409 | } |
c66ac9db | 410 | } |
01468346 | 411 | spin_unlock_irqrestore(&se_tpg->acl_node_lock, flags); |
c66ac9db | 412 | |
6708bb27 | 413 | pr_debug("TARGET_CORE[%s]: Deregistered fabric_sess\n", |
e3d6f909 | 414 | se_tpg->se_tpg_tfo->get_fabric_name()); |
01468346 | 415 | /* |
afb999ff NB |
416 | * If last kref is dropping now for an explict NodeACL, awake sleeping |
417 | * ->acl_free_comp caller to wakeup configfs se_node_acl->acl_group | |
418 | * removal context. | |
01468346 NB |
419 | */ |
420 | if (se_nacl && comp_nacl == true) | |
afb999ff | 421 | target_put_nacl(se_nacl); |
01468346 | 422 | |
afb999ff | 423 | transport_free_session(se_sess); |
c66ac9db NB |
424 | } |
425 | EXPORT_SYMBOL(transport_deregister_session); | |
426 | ||
427 | /* | |
a1d8b49a | 428 | * Called with cmd->t_state_lock held. |
c66ac9db | 429 | */ |
cf572a96 | 430 | static void target_remove_from_state_list(struct se_cmd *cmd) |
c66ac9db | 431 | { |
42bf829e | 432 | struct se_device *dev = cmd->se_dev; |
c66ac9db NB |
433 | unsigned long flags; |
434 | ||
42bf829e CH |
435 | if (!dev) |
436 | return; | |
c66ac9db | 437 | |
cf572a96 CH |
438 | if (cmd->transport_state & CMD_T_BUSY) |
439 | return; | |
c66ac9db | 440 | |
cf572a96 CH |
441 | spin_lock_irqsave(&dev->execute_task_lock, flags); |
442 | if (cmd->state_active) { | |
443 | list_del(&cmd->state_list); | |
cf572a96 | 444 | cmd->state_active = false; |
c66ac9db | 445 | } |
cf572a96 | 446 | spin_unlock_irqrestore(&dev->execute_task_lock, flags); |
c66ac9db NB |
447 | } |
448 | ||
f7113a47 | 449 | static int transport_cmd_check_stop(struct se_cmd *cmd, bool remove_from_lists) |
c66ac9db NB |
450 | { |
451 | unsigned long flags; | |
452 | ||
a1d8b49a | 453 | spin_lock_irqsave(&cmd->t_state_lock, flags); |
c66ac9db NB |
454 | /* |
455 | * Determine if IOCTL context caller in requesting the stopping of this | |
456 | * command for LUN shutdown purposes. | |
457 | */ | |
7d680f3b CH |
458 | if (cmd->transport_state & CMD_T_LUN_STOP) { |
459 | pr_debug("%s:%d CMD_T_LUN_STOP for ITT: 0x%08x\n", | |
460 | __func__, __LINE__, cmd->se_tfo->get_task_tag(cmd)); | |
c66ac9db | 461 | |
7d680f3b | 462 | cmd->transport_state &= ~CMD_T_ACTIVE; |
f7113a47 | 463 | if (remove_from_lists) |
cf572a96 | 464 | target_remove_from_state_list(cmd); |
a1d8b49a | 465 | spin_unlock_irqrestore(&cmd->t_state_lock, flags); |
c66ac9db | 466 | |
a1d8b49a | 467 | complete(&cmd->transport_lun_stop_comp); |
c66ac9db NB |
468 | return 1; |
469 | } | |
f7113a47 CH |
470 | |
471 | if (remove_from_lists) { | |
472 | target_remove_from_state_list(cmd); | |
473 | ||
474 | /* | |
475 | * Clear struct se_cmd->se_lun before the handoff to FE. | |
476 | */ | |
477 | cmd->se_lun = NULL; | |
478 | } | |
479 | ||
c66ac9db NB |
480 | /* |
481 | * Determine if frontend context caller is requesting the stopping of | |
e3d6f909 | 482 | * this command for frontend exceptions. |
c66ac9db | 483 | */ |
7d680f3b CH |
484 | if (cmd->transport_state & CMD_T_STOP) { |
485 | pr_debug("%s:%d CMD_T_STOP for ITT: 0x%08x\n", | |
486 | __func__, __LINE__, | |
e3d6f909 | 487 | cmd->se_tfo->get_task_tag(cmd)); |
c66ac9db | 488 | |
a1d8b49a | 489 | spin_unlock_irqrestore(&cmd->t_state_lock, flags); |
c66ac9db | 490 | |
a1d8b49a | 491 | complete(&cmd->t_transport_stop_comp); |
c66ac9db NB |
492 | return 1; |
493 | } | |
f7113a47 CH |
494 | |
495 | cmd->transport_state &= ~CMD_T_ACTIVE; | |
496 | if (remove_from_lists) { | |
497 | /* | |
498 | * Some fabric modules like tcm_loop can release | |
499 | * their internally allocated I/O reference now and | |
500 | * struct se_cmd now. | |
501 | * | |
502 | * Fabric modules are expected to return '1' here if the | |
503 | * se_cmd being passed is released at this point, | |
504 | * or zero if not being released. | |
505 | */ | |
506 | if (cmd->se_tfo->check_stop_free != NULL) { | |
507 | spin_unlock_irqrestore(&cmd->t_state_lock, flags); | |
508 | return cmd->se_tfo->check_stop_free(cmd); | |
c66ac9db | 509 | } |
f7113a47 | 510 | } |
c66ac9db | 511 | |
a1d8b49a | 512 | spin_unlock_irqrestore(&cmd->t_state_lock, flags); |
c66ac9db NB |
513 | return 0; |
514 | } | |
515 | ||
516 | static int transport_cmd_check_stop_to_fabric(struct se_cmd *cmd) | |
517 | { | |
f7113a47 | 518 | return transport_cmd_check_stop(cmd, true); |
c66ac9db NB |
519 | } |
520 | ||
521 | static void transport_lun_remove_cmd(struct se_cmd *cmd) | |
522 | { | |
e3d6f909 | 523 | struct se_lun *lun = cmd->se_lun; |
c66ac9db NB |
524 | unsigned long flags; |
525 | ||
526 | if (!lun) | |
527 | return; | |
528 | ||
a1d8b49a | 529 | spin_lock_irqsave(&cmd->t_state_lock, flags); |
7d680f3b CH |
530 | if (cmd->transport_state & CMD_T_DEV_ACTIVE) { |
531 | cmd->transport_state &= ~CMD_T_DEV_ACTIVE; | |
cf572a96 | 532 | target_remove_from_state_list(cmd); |
c66ac9db | 533 | } |
a1d8b49a | 534 | spin_unlock_irqrestore(&cmd->t_state_lock, flags); |
c66ac9db | 535 | |
c66ac9db | 536 | spin_lock_irqsave(&lun->lun_cmd_lock, flags); |
3d26fea0 CH |
537 | if (!list_empty(&cmd->se_lun_node)) |
538 | list_del_init(&cmd->se_lun_node); | |
c66ac9db NB |
539 | spin_unlock_irqrestore(&lun->lun_cmd_lock, flags); |
540 | } | |
541 | ||
542 | void transport_cmd_finish_abort(struct se_cmd *cmd, int remove) | |
543 | { | |
c66ac9db NB |
544 | if (transport_cmd_check_stop_to_fabric(cmd)) |
545 | return; | |
af877292 | 546 | if (remove) |
e6a2573f | 547 | transport_put_cmd(cmd); |
c66ac9db NB |
548 | } |
549 | ||
35e0e757 CH |
550 | static void target_complete_failure_work(struct work_struct *work) |
551 | { | |
552 | struct se_cmd *cmd = container_of(work, struct se_cmd, work); | |
553 | ||
de103c93 CH |
554 | transport_generic_request_failure(cmd, |
555 | TCM_LOGICAL_UNIT_COMMUNICATION_FAILURE); | |
35e0e757 CH |
556 | } |
557 | ||
6138ed2a | 558 | /* |
d5829eac PB |
559 | * Used when asking transport to copy Sense Data from the underlying |
560 | * Linux/SCSI struct scsi_cmnd | |
6138ed2a | 561 | */ |
d5829eac | 562 | static unsigned char *transport_get_sense_buffer(struct se_cmd *cmd) |
6138ed2a | 563 | { |
6138ed2a | 564 | struct se_device *dev = cmd->se_dev; |
6138ed2a PB |
565 | |
566 | WARN_ON(!cmd->se_lun); | |
567 | ||
568 | if (!dev) | |
d5829eac | 569 | return NULL; |
6138ed2a | 570 | |
d5829eac PB |
571 | if (cmd->se_cmd_flags & SCF_SENT_CHECK_CONDITION) |
572 | return NULL; | |
6138ed2a | 573 | |
9c58b7dd | 574 | cmd->scsi_sense_length = TRANSPORT_SENSE_BUFFER; |
6138ed2a | 575 | |
d5829eac | 576 | pr_debug("HBA_[%u]_PLUG[%s]: Requesting sense for SAM STATUS: 0x%02x\n", |
6138ed2a | 577 | dev->se_hba->hba_id, dev->transport->name, cmd->scsi_status); |
9c58b7dd | 578 | return cmd->sense_buffer; |
6138ed2a PB |
579 | } |
580 | ||
5787cacd | 581 | void target_complete_cmd(struct se_cmd *cmd, u8 scsi_status) |
c66ac9db | 582 | { |
42bf829e | 583 | struct se_device *dev = cmd->se_dev; |
5787cacd | 584 | int success = scsi_status == GOOD; |
c66ac9db | 585 | unsigned long flags; |
c66ac9db | 586 | |
5787cacd CH |
587 | cmd->scsi_status = scsi_status; |
588 | ||
589 | ||
a1d8b49a | 590 | spin_lock_irqsave(&cmd->t_state_lock, flags); |
cf572a96 | 591 | cmd->transport_state &= ~CMD_T_BUSY; |
c66ac9db | 592 | |
c66ac9db | 593 | if (dev && dev->transport->transport_complete) { |
d5829eac PB |
594 | dev->transport->transport_complete(cmd, |
595 | cmd->t_data_sg, | |
596 | transport_get_sense_buffer(cmd)); | |
597 | if (cmd->se_cmd_flags & SCF_TRANSPORT_TASK_SENSE) | |
c66ac9db | 598 | success = 1; |
c66ac9db NB |
599 | } |
600 | ||
601 | /* | |
5787cacd | 602 | * See if we are waiting to complete for an exception condition. |
c66ac9db | 603 | */ |
cf572a96 | 604 | if (cmd->transport_state & CMD_T_REQUEST_STOP) { |
a1d8b49a | 605 | spin_unlock_irqrestore(&cmd->t_state_lock, flags); |
cf572a96 | 606 | complete(&cmd->task_stop_comp); |
c66ac9db NB |
607 | return; |
608 | } | |
2235007c CH |
609 | |
610 | if (!success) | |
7d680f3b | 611 | cmd->transport_state |= CMD_T_FAILED; |
2235007c | 612 | |
3d28934a NB |
613 | /* |
614 | * Check for case where an explict ABORT_TASK has been received | |
615 | * and transport_wait_for_tasks() will be waiting for completion.. | |
616 | */ | |
617 | if (cmd->transport_state & CMD_T_ABORTED && | |
618 | cmd->transport_state & CMD_T_STOP) { | |
619 | spin_unlock_irqrestore(&cmd->t_state_lock, flags); | |
620 | complete(&cmd->t_transport_stop_comp); | |
621 | return; | |
622 | } else if (cmd->transport_state & CMD_T_FAILED) { | |
35e0e757 | 623 | INIT_WORK(&cmd->work, target_complete_failure_work); |
c66ac9db | 624 | } else { |
35e0e757 | 625 | INIT_WORK(&cmd->work, target_complete_ok_work); |
c66ac9db | 626 | } |
35e0e757 | 627 | |
35e0e757 | 628 | cmd->t_state = TRANSPORT_COMPLETE; |
3d28934a | 629 | cmd->transport_state |= (CMD_T_COMPLETE | CMD_T_ACTIVE); |
a1d8b49a | 630 | spin_unlock_irqrestore(&cmd->t_state_lock, flags); |
c66ac9db | 631 | |
35e0e757 | 632 | queue_work(target_completion_wq, &cmd->work); |
c66ac9db | 633 | } |
6bb35e00 CH |
634 | EXPORT_SYMBOL(target_complete_cmd); |
635 | ||
cf572a96 | 636 | static void target_add_to_state_list(struct se_cmd *cmd) |
c66ac9db | 637 | { |
cf572a96 CH |
638 | struct se_device *dev = cmd->se_dev; |
639 | unsigned long flags; | |
c66ac9db | 640 | |
cf572a96 CH |
641 | spin_lock_irqsave(&dev->execute_task_lock, flags); |
642 | if (!cmd->state_active) { | |
643 | list_add_tail(&cmd->state_list, &dev->state_list); | |
644 | cmd->state_active = true; | |
c66ac9db | 645 | } |
cf572a96 | 646 | spin_unlock_irqrestore(&dev->execute_task_lock, flags); |
c66ac9db NB |
647 | } |
648 | ||
07bde79a | 649 | /* |
f147abb4 | 650 | * Handle QUEUE_FULL / -EAGAIN and -ENOMEM status |
07bde79a | 651 | */ |
7a6f0a1e CH |
652 | static void transport_write_pending_qf(struct se_cmd *cmd); |
653 | static void transport_complete_qf(struct se_cmd *cmd); | |
07bde79a | 654 | |
0fd97ccf | 655 | void target_qf_do_work(struct work_struct *work) |
07bde79a NB |
656 | { |
657 | struct se_device *dev = container_of(work, struct se_device, | |
658 | qf_work_queue); | |
bcac364a | 659 | LIST_HEAD(qf_cmd_list); |
07bde79a NB |
660 | struct se_cmd *cmd, *cmd_tmp; |
661 | ||
662 | spin_lock_irq(&dev->qf_cmd_lock); | |
bcac364a RD |
663 | list_splice_init(&dev->qf_cmd_list, &qf_cmd_list); |
664 | spin_unlock_irq(&dev->qf_cmd_lock); | |
07bde79a | 665 | |
bcac364a | 666 | list_for_each_entry_safe(cmd, cmd_tmp, &qf_cmd_list, se_qf_node) { |
07bde79a NB |
667 | list_del(&cmd->se_qf_node); |
668 | atomic_dec(&dev->dev_qf_count); | |
669 | smp_mb__after_atomic_dec(); | |
07bde79a | 670 | |
6708bb27 | 671 | pr_debug("Processing %s cmd: %p QUEUE_FULL in work queue" |
07bde79a | 672 | " context: %s\n", cmd->se_tfo->get_fabric_name(), cmd, |
e057f533 | 673 | (cmd->t_state == TRANSPORT_COMPLETE_QF_OK) ? "COMPLETE_OK" : |
07bde79a NB |
674 | (cmd->t_state == TRANSPORT_COMPLETE_QF_WP) ? "WRITE_PENDING" |
675 | : "UNKNOWN"); | |
f7a5cc0b | 676 | |
7a6f0a1e CH |
677 | if (cmd->t_state == TRANSPORT_COMPLETE_QF_WP) |
678 | transport_write_pending_qf(cmd); | |
679 | else if (cmd->t_state == TRANSPORT_COMPLETE_QF_OK) | |
680 | transport_complete_qf(cmd); | |
07bde79a | 681 | } |
07bde79a NB |
682 | } |
683 | ||
c66ac9db NB |
684 | unsigned char *transport_dump_cmd_direction(struct se_cmd *cmd) |
685 | { | |
686 | switch (cmd->data_direction) { | |
687 | case DMA_NONE: | |
688 | return "NONE"; | |
689 | case DMA_FROM_DEVICE: | |
690 | return "READ"; | |
691 | case DMA_TO_DEVICE: | |
692 | return "WRITE"; | |
693 | case DMA_BIDIRECTIONAL: | |
694 | return "BIDI"; | |
695 | default: | |
696 | break; | |
697 | } | |
698 | ||
699 | return "UNKNOWN"; | |
700 | } | |
701 | ||
702 | void transport_dump_dev_state( | |
703 | struct se_device *dev, | |
704 | char *b, | |
705 | int *bl) | |
706 | { | |
707 | *bl += sprintf(b + *bl, "Status: "); | |
0fd97ccf | 708 | if (dev->export_count) |
c66ac9db | 709 | *bl += sprintf(b + *bl, "ACTIVATED"); |
0fd97ccf | 710 | else |
c66ac9db | 711 | *bl += sprintf(b + *bl, "DEACTIVATED"); |
c66ac9db | 712 | |
5f41a31d | 713 | *bl += sprintf(b + *bl, " Max Queue Depth: %d", dev->queue_depth); |
11e764bd | 714 | *bl += sprintf(b + *bl, " SectorSize: %u HwMaxSectors: %u\n", |
0fd97ccf CH |
715 | dev->dev_attrib.block_size, |
716 | dev->dev_attrib.hw_max_sectors); | |
c66ac9db NB |
717 | *bl += sprintf(b + *bl, " "); |
718 | } | |
719 | ||
c66ac9db NB |
720 | void transport_dump_vpd_proto_id( |
721 | struct t10_vpd *vpd, | |
722 | unsigned char *p_buf, | |
723 | int p_buf_len) | |
724 | { | |
725 | unsigned char buf[VPD_TMP_BUF_SIZE]; | |
726 | int len; | |
727 | ||
728 | memset(buf, 0, VPD_TMP_BUF_SIZE); | |
729 | len = sprintf(buf, "T10 VPD Protocol Identifier: "); | |
730 | ||
731 | switch (vpd->protocol_identifier) { | |
732 | case 0x00: | |
733 | sprintf(buf+len, "Fibre Channel\n"); | |
734 | break; | |
735 | case 0x10: | |
736 | sprintf(buf+len, "Parallel SCSI\n"); | |
737 | break; | |
738 | case 0x20: | |
739 | sprintf(buf+len, "SSA\n"); | |
740 | break; | |
741 | case 0x30: | |
742 | sprintf(buf+len, "IEEE 1394\n"); | |
743 | break; | |
744 | case 0x40: | |
745 | sprintf(buf+len, "SCSI Remote Direct Memory Access" | |
746 | " Protocol\n"); | |
747 | break; | |
748 | case 0x50: | |
749 | sprintf(buf+len, "Internet SCSI (iSCSI)\n"); | |
750 | break; | |
751 | case 0x60: | |
752 | sprintf(buf+len, "SAS Serial SCSI Protocol\n"); | |
753 | break; | |
754 | case 0x70: | |
755 | sprintf(buf+len, "Automation/Drive Interface Transport" | |
756 | " Protocol\n"); | |
757 | break; | |
758 | case 0x80: | |
759 | sprintf(buf+len, "AT Attachment Interface ATA/ATAPI\n"); | |
760 | break; | |
761 | default: | |
762 | sprintf(buf+len, "Unknown 0x%02x\n", | |
763 | vpd->protocol_identifier); | |
764 | break; | |
765 | } | |
766 | ||
767 | if (p_buf) | |
768 | strncpy(p_buf, buf, p_buf_len); | |
769 | else | |
6708bb27 | 770 | pr_debug("%s", buf); |
c66ac9db NB |
771 | } |
772 | ||
773 | void | |
774 | transport_set_vpd_proto_id(struct t10_vpd *vpd, unsigned char *page_83) | |
775 | { | |
776 | /* | |
777 | * Check if the Protocol Identifier Valid (PIV) bit is set.. | |
778 | * | |
779 | * from spc3r23.pdf section 7.5.1 | |
780 | */ | |
781 | if (page_83[1] & 0x80) { | |
782 | vpd->protocol_identifier = (page_83[0] & 0xf0); | |
783 | vpd->protocol_identifier_set = 1; | |
784 | transport_dump_vpd_proto_id(vpd, NULL, 0); | |
785 | } | |
786 | } | |
787 | EXPORT_SYMBOL(transport_set_vpd_proto_id); | |
788 | ||
789 | int transport_dump_vpd_assoc( | |
790 | struct t10_vpd *vpd, | |
791 | unsigned char *p_buf, | |
792 | int p_buf_len) | |
793 | { | |
794 | unsigned char buf[VPD_TMP_BUF_SIZE]; | |
e3d6f909 AG |
795 | int ret = 0; |
796 | int len; | |
c66ac9db NB |
797 | |
798 | memset(buf, 0, VPD_TMP_BUF_SIZE); | |
799 | len = sprintf(buf, "T10 VPD Identifier Association: "); | |
800 | ||
801 | switch (vpd->association) { | |
802 | case 0x00: | |
803 | sprintf(buf+len, "addressed logical unit\n"); | |
804 | break; | |
805 | case 0x10: | |
806 | sprintf(buf+len, "target port\n"); | |
807 | break; | |
808 | case 0x20: | |
809 | sprintf(buf+len, "SCSI target device\n"); | |
810 | break; | |
811 | default: | |
812 | sprintf(buf+len, "Unknown 0x%02x\n", vpd->association); | |
e3d6f909 | 813 | ret = -EINVAL; |
c66ac9db NB |
814 | break; |
815 | } | |
816 | ||
817 | if (p_buf) | |
818 | strncpy(p_buf, buf, p_buf_len); | |
819 | else | |
6708bb27 | 820 | pr_debug("%s", buf); |
c66ac9db NB |
821 | |
822 | return ret; | |
823 | } | |
824 | ||
825 | int transport_set_vpd_assoc(struct t10_vpd *vpd, unsigned char *page_83) | |
826 | { | |
827 | /* | |
828 | * The VPD identification association.. | |
829 | * | |
830 | * from spc3r23.pdf Section 7.6.3.1 Table 297 | |
831 | */ | |
832 | vpd->association = (page_83[1] & 0x30); | |
833 | return transport_dump_vpd_assoc(vpd, NULL, 0); | |
834 | } | |
835 | EXPORT_SYMBOL(transport_set_vpd_assoc); | |
836 | ||
837 | int transport_dump_vpd_ident_type( | |
838 | struct t10_vpd *vpd, | |
839 | unsigned char *p_buf, | |
840 | int p_buf_len) | |
841 | { | |
842 | unsigned char buf[VPD_TMP_BUF_SIZE]; | |
e3d6f909 AG |
843 | int ret = 0; |
844 | int len; | |
c66ac9db NB |
845 | |
846 | memset(buf, 0, VPD_TMP_BUF_SIZE); | |
847 | len = sprintf(buf, "T10 VPD Identifier Type: "); | |
848 | ||
849 | switch (vpd->device_identifier_type) { | |
850 | case 0x00: | |
851 | sprintf(buf+len, "Vendor specific\n"); | |
852 | break; | |
853 | case 0x01: | |
854 | sprintf(buf+len, "T10 Vendor ID based\n"); | |
855 | break; | |
856 | case 0x02: | |
857 | sprintf(buf+len, "EUI-64 based\n"); | |
858 | break; | |
859 | case 0x03: | |
860 | sprintf(buf+len, "NAA\n"); | |
861 | break; | |
862 | case 0x04: | |
863 | sprintf(buf+len, "Relative target port identifier\n"); | |
864 | break; | |
865 | case 0x08: | |
866 | sprintf(buf+len, "SCSI name string\n"); | |
867 | break; | |
868 | default: | |
869 | sprintf(buf+len, "Unsupported: 0x%02x\n", | |
870 | vpd->device_identifier_type); | |
e3d6f909 | 871 | ret = -EINVAL; |
c66ac9db NB |
872 | break; |
873 | } | |
874 | ||
e3d6f909 AG |
875 | if (p_buf) { |
876 | if (p_buf_len < strlen(buf)+1) | |
877 | return -EINVAL; | |
c66ac9db | 878 | strncpy(p_buf, buf, p_buf_len); |
e3d6f909 | 879 | } else { |
6708bb27 | 880 | pr_debug("%s", buf); |
e3d6f909 | 881 | } |
c66ac9db NB |
882 | |
883 | return ret; | |
884 | } | |
885 | ||
886 | int transport_set_vpd_ident_type(struct t10_vpd *vpd, unsigned char *page_83) | |
887 | { | |
888 | /* | |
889 | * The VPD identifier type.. | |
890 | * | |
891 | * from spc3r23.pdf Section 7.6.3.1 Table 298 | |
892 | */ | |
893 | vpd->device_identifier_type = (page_83[1] & 0x0f); | |
894 | return transport_dump_vpd_ident_type(vpd, NULL, 0); | |
895 | } | |
896 | EXPORT_SYMBOL(transport_set_vpd_ident_type); | |
897 | ||
898 | int transport_dump_vpd_ident( | |
899 | struct t10_vpd *vpd, | |
900 | unsigned char *p_buf, | |
901 | int p_buf_len) | |
902 | { | |
903 | unsigned char buf[VPD_TMP_BUF_SIZE]; | |
904 | int ret = 0; | |
905 | ||
906 | memset(buf, 0, VPD_TMP_BUF_SIZE); | |
907 | ||
908 | switch (vpd->device_identifier_code_set) { | |
909 | case 0x01: /* Binary */ | |
910 | sprintf(buf, "T10 VPD Binary Device Identifier: %s\n", | |
911 | &vpd->device_identifier[0]); | |
912 | break; | |
913 | case 0x02: /* ASCII */ | |
914 | sprintf(buf, "T10 VPD ASCII Device Identifier: %s\n", | |
915 | &vpd->device_identifier[0]); | |
916 | break; | |
917 | case 0x03: /* UTF-8 */ | |
918 | sprintf(buf, "T10 VPD UTF-8 Device Identifier: %s\n", | |
919 | &vpd->device_identifier[0]); | |
920 | break; | |
921 | default: | |
922 | sprintf(buf, "T10 VPD Device Identifier encoding unsupported:" | |
923 | " 0x%02x", vpd->device_identifier_code_set); | |
e3d6f909 | 924 | ret = -EINVAL; |
c66ac9db NB |
925 | break; |
926 | } | |
927 | ||
928 | if (p_buf) | |
929 | strncpy(p_buf, buf, p_buf_len); | |
930 | else | |
6708bb27 | 931 | pr_debug("%s", buf); |
c66ac9db NB |
932 | |
933 | return ret; | |
934 | } | |
935 | ||
936 | int | |
937 | transport_set_vpd_ident(struct t10_vpd *vpd, unsigned char *page_83) | |
938 | { | |
939 | static const char hex_str[] = "0123456789abcdef"; | |
35d1efe8 | 940 | int j = 0, i = 4; /* offset to start of the identifier */ |
c66ac9db NB |
941 | |
942 | /* | |
943 | * The VPD Code Set (encoding) | |
944 | * | |
945 | * from spc3r23.pdf Section 7.6.3.1 Table 296 | |
946 | */ | |
947 | vpd->device_identifier_code_set = (page_83[0] & 0x0f); | |
948 | switch (vpd->device_identifier_code_set) { | |
949 | case 0x01: /* Binary */ | |
950 | vpd->device_identifier[j++] = | |
951 | hex_str[vpd->device_identifier_type]; | |
952 | while (i < (4 + page_83[3])) { | |
953 | vpd->device_identifier[j++] = | |
954 | hex_str[(page_83[i] & 0xf0) >> 4]; | |
955 | vpd->device_identifier[j++] = | |
956 | hex_str[page_83[i] & 0x0f]; | |
957 | i++; | |
958 | } | |
959 | break; | |
960 | case 0x02: /* ASCII */ | |
961 | case 0x03: /* UTF-8 */ | |
962 | while (i < (4 + page_83[3])) | |
963 | vpd->device_identifier[j++] = page_83[i++]; | |
964 | break; | |
965 | default: | |
966 | break; | |
967 | } | |
968 | ||
969 | return transport_dump_vpd_ident(vpd, NULL, 0); | |
970 | } | |
971 | EXPORT_SYMBOL(transport_set_vpd_ident); | |
972 | ||
de103c93 CH |
973 | sense_reason_t |
974 | target_cmd_size_check(struct se_cmd *cmd, unsigned int size) | |
9b3b8041 CH |
975 | { |
976 | struct se_device *dev = cmd->se_dev; | |
977 | ||
978 | if (cmd->unknown_data_length) { | |
979 | cmd->data_length = size; | |
980 | } else if (size != cmd->data_length) { | |
981 | pr_warn("TARGET_CORE[%s]: Expected Transfer Length:" | |
982 | " %u does not match SCSI CDB Length: %u for SAM Opcode:" | |
983 | " 0x%02x\n", cmd->se_tfo->get_fabric_name(), | |
984 | cmd->data_length, size, cmd->t_task_cdb[0]); | |
985 | ||
9b3b8041 CH |
986 | if (cmd->data_direction == DMA_TO_DEVICE) { |
987 | pr_err("Rejecting underflow/overflow" | |
988 | " WRITE data\n"); | |
de103c93 | 989 | return TCM_INVALID_CDB_FIELD; |
9b3b8041 CH |
990 | } |
991 | /* | |
992 | * Reject READ_* or WRITE_* with overflow/underflow for | |
993 | * type SCF_SCSI_DATA_CDB. | |
994 | */ | |
0fd97ccf | 995 | if (dev->dev_attrib.block_size != 512) { |
9b3b8041 CH |
996 | pr_err("Failing OVERFLOW/UNDERFLOW for LBA op" |
997 | " CDB on non 512-byte sector setup subsystem" | |
998 | " plugin: %s\n", dev->transport->name); | |
999 | /* Returns CHECK_CONDITION + INVALID_CDB_FIELD */ | |
de103c93 | 1000 | return TCM_INVALID_CDB_FIELD; |
9b3b8041 | 1001 | } |
4c054ba6 NB |
1002 | /* |
1003 | * For the overflow case keep the existing fabric provided | |
1004 | * ->data_length. Otherwise for the underflow case, reset | |
1005 | * ->data_length to the smaller SCSI expected data transfer | |
1006 | * length. | |
1007 | */ | |
9b3b8041 CH |
1008 | if (size > cmd->data_length) { |
1009 | cmd->se_cmd_flags |= SCF_OVERFLOW_BIT; | |
1010 | cmd->residual_count = (size - cmd->data_length); | |
1011 | } else { | |
1012 | cmd->se_cmd_flags |= SCF_UNDERFLOW_BIT; | |
1013 | cmd->residual_count = (cmd->data_length - size); | |
4c054ba6 | 1014 | cmd->data_length = size; |
9b3b8041 | 1015 | } |
9b3b8041 CH |
1016 | } |
1017 | ||
1018 | return 0; | |
1019 | ||
9b3b8041 CH |
1020 | } |
1021 | ||
c66ac9db NB |
1022 | /* |
1023 | * Used by fabric modules containing a local struct se_cmd within their | |
1024 | * fabric dependent per I/O descriptor. | |
1025 | */ | |
1026 | void transport_init_se_cmd( | |
1027 | struct se_cmd *cmd, | |
1028 | struct target_core_fabric_ops *tfo, | |
1029 | struct se_session *se_sess, | |
1030 | u32 data_length, | |
1031 | int data_direction, | |
1032 | int task_attr, | |
1033 | unsigned char *sense_buffer) | |
1034 | { | |
5951146d AG |
1035 | INIT_LIST_HEAD(&cmd->se_lun_node); |
1036 | INIT_LIST_HEAD(&cmd->se_delayed_node); | |
07bde79a | 1037 | INIT_LIST_HEAD(&cmd->se_qf_node); |
a17f091d | 1038 | INIT_LIST_HEAD(&cmd->se_cmd_list); |
cf572a96 | 1039 | INIT_LIST_HEAD(&cmd->state_list); |
a1d8b49a AG |
1040 | init_completion(&cmd->transport_lun_fe_stop_comp); |
1041 | init_completion(&cmd->transport_lun_stop_comp); | |
1042 | init_completion(&cmd->t_transport_stop_comp); | |
a17f091d | 1043 | init_completion(&cmd->cmd_wait_comp); |
cf572a96 | 1044 | init_completion(&cmd->task_stop_comp); |
a1d8b49a | 1045 | spin_lock_init(&cmd->t_state_lock); |
7d680f3b | 1046 | cmd->transport_state = CMD_T_DEV_ACTIVE; |
c66ac9db NB |
1047 | |
1048 | cmd->se_tfo = tfo; | |
1049 | cmd->se_sess = se_sess; | |
1050 | cmd->data_length = data_length; | |
1051 | cmd->data_direction = data_direction; | |
1052 | cmd->sam_task_attr = task_attr; | |
1053 | cmd->sense_buffer = sense_buffer; | |
cf572a96 CH |
1054 | |
1055 | cmd->state_active = false; | |
c66ac9db NB |
1056 | } |
1057 | EXPORT_SYMBOL(transport_init_se_cmd); | |
1058 | ||
de103c93 CH |
1059 | static sense_reason_t |
1060 | transport_check_alloc_task_attr(struct se_cmd *cmd) | |
c66ac9db | 1061 | { |
019c4ca6 CH |
1062 | struct se_device *dev = cmd->se_dev; |
1063 | ||
c66ac9db NB |
1064 | /* |
1065 | * Check if SAM Task Attribute emulation is enabled for this | |
1066 | * struct se_device storage object | |
1067 | */ | |
019c4ca6 | 1068 | if (dev->transport->transport_type == TRANSPORT_PLUGIN_PHBA_PDEV) |
c66ac9db NB |
1069 | return 0; |
1070 | ||
e66ecd50 | 1071 | if (cmd->sam_task_attr == MSG_ACA_TAG) { |
6708bb27 | 1072 | pr_debug("SAM Task Attribute ACA" |
c66ac9db | 1073 | " emulation is not supported\n"); |
de103c93 | 1074 | return TCM_INVALID_CDB_FIELD; |
c66ac9db NB |
1075 | } |
1076 | /* | |
1077 | * Used to determine when ORDERED commands should go from | |
1078 | * Dormant to Active status. | |
1079 | */ | |
019c4ca6 | 1080 | cmd->se_ordered_id = atomic_inc_return(&dev->dev_ordered_id); |
c66ac9db | 1081 | smp_mb__after_atomic_inc(); |
6708bb27 | 1082 | pr_debug("Allocated se_ordered_id: %u for Task Attr: 0x%02x on %s\n", |
c66ac9db | 1083 | cmd->se_ordered_id, cmd->sam_task_attr, |
019c4ca6 | 1084 | dev->transport->name); |
c66ac9db NB |
1085 | return 0; |
1086 | } | |
1087 | ||
de103c93 CH |
1088 | sense_reason_t |
1089 | target_setup_cmd_from_cdb(struct se_cmd *cmd, unsigned char *cdb) | |
c66ac9db | 1090 | { |
0fd97ccf | 1091 | struct se_device *dev = cmd->se_dev; |
cb4f4d3c | 1092 | unsigned long flags; |
de103c93 | 1093 | sense_reason_t ret; |
c66ac9db | 1094 | |
c66ac9db NB |
1095 | /* |
1096 | * Ensure that the received CDB is less than the max (252 + 8) bytes | |
1097 | * for VARIABLE_LENGTH_CMD | |
1098 | */ | |
1099 | if (scsi_command_size(cdb) > SCSI_MAX_VARLEN_CDB_SIZE) { | |
6708bb27 | 1100 | pr_err("Received SCSI CDB with command_size: %d that" |
c66ac9db NB |
1101 | " exceeds SCSI_MAX_VARLEN_CDB_SIZE: %d\n", |
1102 | scsi_command_size(cdb), SCSI_MAX_VARLEN_CDB_SIZE); | |
de103c93 | 1103 | return TCM_INVALID_CDB_FIELD; |
c66ac9db NB |
1104 | } |
1105 | /* | |
1106 | * If the received CDB is larger than TCM_MAX_COMMAND_SIZE, | |
1107 | * allocate the additional extended CDB buffer now.. Otherwise | |
1108 | * setup the pointer from __t_task_cdb to t_task_cdb. | |
1109 | */ | |
a1d8b49a AG |
1110 | if (scsi_command_size(cdb) > sizeof(cmd->__t_task_cdb)) { |
1111 | cmd->t_task_cdb = kzalloc(scsi_command_size(cdb), | |
c66ac9db | 1112 | GFP_KERNEL); |
6708bb27 AG |
1113 | if (!cmd->t_task_cdb) { |
1114 | pr_err("Unable to allocate cmd->t_task_cdb" | |
a1d8b49a | 1115 | " %u > sizeof(cmd->__t_task_cdb): %lu ops\n", |
c66ac9db | 1116 | scsi_command_size(cdb), |
a1d8b49a | 1117 | (unsigned long)sizeof(cmd->__t_task_cdb)); |
de103c93 | 1118 | return TCM_OUT_OF_RESOURCES; |
c66ac9db NB |
1119 | } |
1120 | } else | |
a1d8b49a | 1121 | cmd->t_task_cdb = &cmd->__t_task_cdb[0]; |
c66ac9db | 1122 | /* |
a1d8b49a | 1123 | * Copy the original CDB into cmd-> |
c66ac9db | 1124 | */ |
a1d8b49a | 1125 | memcpy(cmd->t_task_cdb, cdb, scsi_command_size(cdb)); |
cb4f4d3c CH |
1126 | |
1127 | /* | |
1128 | * Check for an existing UNIT ATTENTION condition | |
1129 | */ | |
de103c93 CH |
1130 | ret = target_scsi3_ua_check(cmd); |
1131 | if (ret) | |
1132 | return ret; | |
cb4f4d3c | 1133 | |
c87fbd56 | 1134 | ret = target_alua_state_check(cmd); |
de103c93 CH |
1135 | if (ret) |
1136 | return ret; | |
cb4f4d3c | 1137 | |
d977f437 | 1138 | ret = target_check_reservation(cmd); |
de103c93 | 1139 | if (ret) |
d977f437 | 1140 | return ret; |
cb4f4d3c | 1141 | |
0fd97ccf | 1142 | ret = dev->transport->parse_cdb(cmd); |
de103c93 CH |
1143 | if (ret) |
1144 | return ret; | |
1145 | ||
1146 | ret = transport_check_alloc_task_attr(cmd); | |
1147 | if (ret) | |
c66ac9db | 1148 | return ret; |
cb4f4d3c CH |
1149 | |
1150 | spin_lock_irqsave(&cmd->t_state_lock, flags); | |
1151 | cmd->se_cmd_flags |= SCF_SUPPORTED_SAM_OPCODE; | |
1152 | spin_unlock_irqrestore(&cmd->t_state_lock, flags); | |
1153 | ||
c66ac9db NB |
1154 | spin_lock(&cmd->se_lun->lun_sep_lock); |
1155 | if (cmd->se_lun->lun_sep) | |
1156 | cmd->se_lun->lun_sep->sep_stats.cmd_pdus++; | |
1157 | spin_unlock(&cmd->se_lun->lun_sep_lock); | |
1158 | return 0; | |
1159 | } | |
a12f41f8 | 1160 | EXPORT_SYMBOL(target_setup_cmd_from_cdb); |
c66ac9db | 1161 | |
695434e1 NB |
1162 | /* |
1163 | * Used by fabric module frontends to queue tasks directly. | |
1164 | * Many only be used from process context only | |
1165 | */ | |
1166 | int transport_handle_cdb_direct( | |
1167 | struct se_cmd *cmd) | |
1168 | { | |
de103c93 | 1169 | sense_reason_t ret; |
dd8ae59d | 1170 | |
695434e1 NB |
1171 | if (!cmd->se_lun) { |
1172 | dump_stack(); | |
6708bb27 | 1173 | pr_err("cmd->se_lun is NULL\n"); |
695434e1 NB |
1174 | return -EINVAL; |
1175 | } | |
1176 | if (in_interrupt()) { | |
1177 | dump_stack(); | |
6708bb27 | 1178 | pr_err("transport_generic_handle_cdb cannot be called" |
695434e1 NB |
1179 | " from interrupt context\n"); |
1180 | return -EINVAL; | |
1181 | } | |
dd8ae59d | 1182 | /* |
af877292 CH |
1183 | * Set TRANSPORT_NEW_CMD state and CMD_T_ACTIVE to ensure that |
1184 | * outstanding descriptors are handled correctly during shutdown via | |
1185 | * transport_wait_for_tasks() | |
dd8ae59d NB |
1186 | * |
1187 | * Also, we don't take cmd->t_state_lock here as we only expect | |
1188 | * this to be called for initial descriptor submission. | |
1189 | */ | |
1190 | cmd->t_state = TRANSPORT_NEW_CMD; | |
7d680f3b CH |
1191 | cmd->transport_state |= CMD_T_ACTIVE; |
1192 | ||
dd8ae59d NB |
1193 | /* |
1194 | * transport_generic_new_cmd() is already handling QUEUE_FULL, | |
1195 | * so follow TRANSPORT_NEW_CMD processing thread context usage | |
1196 | * and call transport_generic_request_failure() if necessary.. | |
1197 | */ | |
1198 | ret = transport_generic_new_cmd(cmd); | |
de103c93 CH |
1199 | if (ret) |
1200 | transport_generic_request_failure(cmd, ret); | |
dd8ae59d | 1201 | return 0; |
695434e1 NB |
1202 | } |
1203 | EXPORT_SYMBOL(transport_handle_cdb_direct); | |
1204 | ||
de103c93 CH |
1205 | static sense_reason_t |
1206 | transport_generic_map_mem_to_cmd(struct se_cmd *cmd, struct scatterlist *sgl, | |
1207 | u32 sgl_count, struct scatterlist *sgl_bidi, u32 sgl_bidi_count) | |
1208 | { | |
1209 | if (!sgl || !sgl_count) | |
1210 | return 0; | |
1211 | ||
1212 | /* | |
1213 | * Reject SCSI data overflow with map_mem_to_cmd() as incoming | |
1214 | * scatterlists already have been set to follow what the fabric | |
1215 | * passes for the original expected data transfer length. | |
1216 | */ | |
1217 | if (cmd->se_cmd_flags & SCF_OVERFLOW_BIT) { | |
1218 | pr_warn("Rejecting SCSI DATA overflow for fabric using" | |
1219 | " SCF_PASSTHROUGH_SG_TO_MEM_NOALLOC\n"); | |
1220 | return TCM_INVALID_CDB_FIELD; | |
1221 | } | |
1222 | ||
1223 | cmd->t_data_sg = sgl; | |
1224 | cmd->t_data_nents = sgl_count; | |
1225 | ||
1226 | if (sgl_bidi && sgl_bidi_count) { | |
1227 | cmd->t_bidi_data_sg = sgl_bidi; | |
1228 | cmd->t_bidi_data_nents = sgl_bidi_count; | |
1229 | } | |
1230 | cmd->se_cmd_flags |= SCF_PASSTHROUGH_SG_TO_MEM_NOALLOC; | |
1231 | return 0; | |
1232 | } | |
1233 | ||
a026757f NB |
1234 | /* |
1235 | * target_submit_cmd_map_sgls - lookup unpacked lun and submit uninitialized | |
1236 | * se_cmd + use pre-allocated SGL memory. | |
a6360785 NB |
1237 | * |
1238 | * @se_cmd: command descriptor to submit | |
1239 | * @se_sess: associated se_sess for endpoint | |
1240 | * @cdb: pointer to SCSI CDB | |
1241 | * @sense: pointer to SCSI sense buffer | |
1242 | * @unpacked_lun: unpacked LUN to reference for struct se_lun | |
1243 | * @data_length: fabric expected data transfer length | |
1244 | * @task_addr: SAM task attribute | |
1245 | * @data_dir: DMA data direction | |
1246 | * @flags: flags for command submission from target_sc_flags_tables | |
a026757f NB |
1247 | * @sgl: struct scatterlist memory for unidirectional mapping |
1248 | * @sgl_count: scatterlist count for unidirectional mapping | |
1249 | * @sgl_bidi: struct scatterlist memory for bidirectional READ mapping | |
1250 | * @sgl_bidi_count: scatterlist count for bidirectional READ mapping | |
a6360785 | 1251 | * |
d6dfc868 RD |
1252 | * Returns non zero to signal active I/O shutdown failure. All other |
1253 | * setup exceptions will be returned as a SCSI CHECK_CONDITION response, | |
1254 | * but still return zero here. | |
1255 | * | |
a6360785 NB |
1256 | * This may only be called from process context, and also currently |
1257 | * assumes internal allocation of fabric payload buffer by target-core. | |
a026757f NB |
1258 | */ |
1259 | int target_submit_cmd_map_sgls(struct se_cmd *se_cmd, struct se_session *se_sess, | |
a6360785 | 1260 | unsigned char *cdb, unsigned char *sense, u32 unpacked_lun, |
a026757f NB |
1261 | u32 data_length, int task_attr, int data_dir, int flags, |
1262 | struct scatterlist *sgl, u32 sgl_count, | |
1263 | struct scatterlist *sgl_bidi, u32 sgl_bidi_count) | |
a6360785 NB |
1264 | { |
1265 | struct se_portal_group *se_tpg; | |
de103c93 CH |
1266 | sense_reason_t rc; |
1267 | int ret; | |
a6360785 NB |
1268 | |
1269 | se_tpg = se_sess->se_tpg; | |
1270 | BUG_ON(!se_tpg); | |
1271 | BUG_ON(se_cmd->se_tfo || se_cmd->se_sess); | |
1272 | BUG_ON(in_interrupt()); | |
1273 | /* | |
1274 | * Initialize se_cmd for target operation. From this point | |
1275 | * exceptions are handled by sending exception status via | |
1276 | * target_core_fabric_ops->queue_status() callback | |
1277 | */ | |
1278 | transport_init_se_cmd(se_cmd, se_tpg->se_tpg_tfo, se_sess, | |
1279 | data_length, data_dir, task_attr, sense); | |
b0d79946 SAS |
1280 | if (flags & TARGET_SCF_UNKNOWN_SIZE) |
1281 | se_cmd->unknown_data_length = 1; | |
a6360785 NB |
1282 | /* |
1283 | * Obtain struct se_cmd->cmd_kref reference and add new cmd to | |
1284 | * se_sess->sess_cmd_list. A second kref_get here is necessary | |
1285 | * for fabrics using TARGET_SCF_ACK_KREF that expect a second | |
1286 | * kref_put() to happen during fabric packet acknowledgement. | |
1287 | */ | |
de103c93 CH |
1288 | ret = target_get_sess_cmd(se_sess, se_cmd, (flags & TARGET_SCF_ACK_KREF)); |
1289 | if (ret) | |
1290 | return ret; | |
a6360785 NB |
1291 | /* |
1292 | * Signal bidirectional data payloads to target-core | |
1293 | */ | |
1294 | if (flags & TARGET_SCF_BIDI_OP) | |
1295 | se_cmd->se_cmd_flags |= SCF_BIDI; | |
1296 | /* | |
1297 | * Locate se_lun pointer and attach it to struct se_cmd | |
1298 | */ | |
de103c93 CH |
1299 | rc = transport_lookup_cmd_lun(se_cmd, unpacked_lun); |
1300 | if (rc) { | |
1301 | transport_send_check_condition_and_sense(se_cmd, rc, 0); | |
735703ca | 1302 | target_put_sess_cmd(se_sess, se_cmd); |
d6dfc868 | 1303 | return 0; |
735703ca | 1304 | } |
d6e0175c | 1305 | |
a12f41f8 | 1306 | rc = target_setup_cmd_from_cdb(se_cmd, cdb); |
735703ca | 1307 | if (rc != 0) { |
de103c93 | 1308 | transport_generic_request_failure(se_cmd, rc); |
d6dfc868 | 1309 | return 0; |
735703ca | 1310 | } |
a026757f NB |
1311 | /* |
1312 | * When a non zero sgl_count has been passed perform SGL passthrough | |
1313 | * mapping for pre-allocated fabric memory instead of having target | |
1314 | * core perform an internal SGL allocation.. | |
1315 | */ | |
1316 | if (sgl_count != 0) { | |
1317 | BUG_ON(!sgl); | |
1318 | ||
944981c7 NB |
1319 | /* |
1320 | * A work-around for tcm_loop as some userspace code via | |
1321 | * scsi-generic do not memset their associated read buffers, | |
1322 | * so go ahead and do that here for type non-data CDBs. Also | |
1323 | * note that this is currently guaranteed to be a single SGL | |
1324 | * for this case by target core in target_setup_cmd_from_cdb() | |
1325 | * -> transport_generic_cmd_sequencer(). | |
1326 | */ | |
1327 | if (!(se_cmd->se_cmd_flags & SCF_SCSI_DATA_CDB) && | |
1328 | se_cmd->data_direction == DMA_FROM_DEVICE) { | |
1329 | unsigned char *buf = NULL; | |
1330 | ||
1331 | if (sgl) | |
1332 | buf = kmap(sg_page(sgl)) + sgl->offset; | |
1333 | ||
1334 | if (buf) { | |
1335 | memset(buf, 0, sgl->length); | |
1336 | kunmap(sg_page(sgl)); | |
1337 | } | |
1338 | } | |
1339 | ||
a026757f NB |
1340 | rc = transport_generic_map_mem_to_cmd(se_cmd, sgl, sgl_count, |
1341 | sgl_bidi, sgl_bidi_count); | |
1342 | if (rc != 0) { | |
de103c93 | 1343 | transport_generic_request_failure(se_cmd, rc); |
a026757f NB |
1344 | return 0; |
1345 | } | |
1346 | } | |
11e319ed AG |
1347 | /* |
1348 | * Check if we need to delay processing because of ALUA | |
1349 | * Active/NonOptimized primary access state.. | |
1350 | */ | |
1351 | core_alua_check_nonop_delay(se_cmd); | |
1352 | ||
a6360785 | 1353 | transport_handle_cdb_direct(se_cmd); |
d6dfc868 | 1354 | return 0; |
a6360785 | 1355 | } |
a026757f NB |
1356 | EXPORT_SYMBOL(target_submit_cmd_map_sgls); |
1357 | ||
1358 | /* | |
1359 | * target_submit_cmd - lookup unpacked lun and submit uninitialized se_cmd | |
1360 | * | |
1361 | * @se_cmd: command descriptor to submit | |
1362 | * @se_sess: associated se_sess for endpoint | |
1363 | * @cdb: pointer to SCSI CDB | |
1364 | * @sense: pointer to SCSI sense buffer | |
1365 | * @unpacked_lun: unpacked LUN to reference for struct se_lun | |
1366 | * @data_length: fabric expected data transfer length | |
1367 | * @task_addr: SAM task attribute | |
1368 | * @data_dir: DMA data direction | |
1369 | * @flags: flags for command submission from target_sc_flags_tables | |
1370 | * | |
1371 | * Returns non zero to signal active I/O shutdown failure. All other | |
1372 | * setup exceptions will be returned as a SCSI CHECK_CONDITION response, | |
1373 | * but still return zero here. | |
1374 | * | |
1375 | * This may only be called from process context, and also currently | |
1376 | * assumes internal allocation of fabric payload buffer by target-core. | |
1377 | * | |
1378 | * It also assumes interal target core SGL memory allocation. | |
1379 | */ | |
1380 | int target_submit_cmd(struct se_cmd *se_cmd, struct se_session *se_sess, | |
1381 | unsigned char *cdb, unsigned char *sense, u32 unpacked_lun, | |
1382 | u32 data_length, int task_attr, int data_dir, int flags) | |
1383 | { | |
1384 | return target_submit_cmd_map_sgls(se_cmd, se_sess, cdb, sense, | |
1385 | unpacked_lun, data_length, task_attr, data_dir, | |
1386 | flags, NULL, 0, NULL, 0); | |
1387 | } | |
a6360785 NB |
1388 | EXPORT_SYMBOL(target_submit_cmd); |
1389 | ||
9f0d05c2 NB |
1390 | static void target_complete_tmr_failure(struct work_struct *work) |
1391 | { | |
1392 | struct se_cmd *se_cmd = container_of(work, struct se_cmd, work); | |
1393 | ||
1394 | se_cmd->se_tmr_req->response = TMR_LUN_DOES_NOT_EXIST; | |
1395 | se_cmd->se_tfo->queue_tm_rsp(se_cmd); | |
5a3b6fc0 RD |
1396 | |
1397 | transport_cmd_check_stop_to_fabric(se_cmd); | |
9f0d05c2 NB |
1398 | } |
1399 | ||
ea98d7f9 AG |
1400 | /** |
1401 | * target_submit_tmr - lookup unpacked lun and submit uninitialized se_cmd | |
1402 | * for TMR CDBs | |
1403 | * | |
1404 | * @se_cmd: command descriptor to submit | |
1405 | * @se_sess: associated se_sess for endpoint | |
1406 | * @sense: pointer to SCSI sense buffer | |
1407 | * @unpacked_lun: unpacked LUN to reference for struct se_lun | |
1408 | * @fabric_context: fabric context for TMR req | |
1409 | * @tm_type: Type of TM request | |
c0974f89 NB |
1410 | * @gfp: gfp type for caller |
1411 | * @tag: referenced task tag for TMR_ABORT_TASK | |
c7042cae | 1412 | * @flags: submit cmd flags |
ea98d7f9 AG |
1413 | * |
1414 | * Callable from all contexts. | |
1415 | **/ | |
1416 | ||
c7042cae | 1417 | int target_submit_tmr(struct se_cmd *se_cmd, struct se_session *se_sess, |
ea98d7f9 | 1418 | unsigned char *sense, u32 unpacked_lun, |
c0974f89 NB |
1419 | void *fabric_tmr_ptr, unsigned char tm_type, |
1420 | gfp_t gfp, unsigned int tag, int flags) | |
ea98d7f9 AG |
1421 | { |
1422 | struct se_portal_group *se_tpg; | |
1423 | int ret; | |
1424 | ||
1425 | se_tpg = se_sess->se_tpg; | |
1426 | BUG_ON(!se_tpg); | |
1427 | ||
1428 | transport_init_se_cmd(se_cmd, se_tpg->se_tpg_tfo, se_sess, | |
1429 | 0, DMA_NONE, MSG_SIMPLE_TAG, sense); | |
c7042cae NB |
1430 | /* |
1431 | * FIXME: Currently expect caller to handle se_cmd->se_tmr_req | |
1432 | * allocation failure. | |
1433 | */ | |
c0974f89 | 1434 | ret = core_tmr_alloc_req(se_cmd, fabric_tmr_ptr, tm_type, gfp); |
c7042cae NB |
1435 | if (ret < 0) |
1436 | return -ENOMEM; | |
ea98d7f9 | 1437 | |
c0974f89 NB |
1438 | if (tm_type == TMR_ABORT_TASK) |
1439 | se_cmd->se_tmr_req->ref_task_tag = tag; | |
1440 | ||
ea98d7f9 | 1441 | /* See target_submit_cmd for commentary */ |
bc187ea6 RD |
1442 | ret = target_get_sess_cmd(se_sess, se_cmd, (flags & TARGET_SCF_ACK_KREF)); |
1443 | if (ret) { | |
1444 | core_tmr_release_req(se_cmd->se_tmr_req); | |
1445 | return ret; | |
1446 | } | |
ea98d7f9 | 1447 | |
ea98d7f9 AG |
1448 | ret = transport_lookup_tmr_lun(se_cmd, unpacked_lun); |
1449 | if (ret) { | |
9f0d05c2 NB |
1450 | /* |
1451 | * For callback during failure handling, push this work off | |
1452 | * to process context with TMR_LUN_DOES_NOT_EXIST status. | |
1453 | */ | |
1454 | INIT_WORK(&se_cmd->work, target_complete_tmr_failure); | |
1455 | schedule_work(&se_cmd->work); | |
c7042cae | 1456 | return 0; |
ea98d7f9 AG |
1457 | } |
1458 | transport_generic_handle_tmr(se_cmd); | |
c7042cae | 1459 | return 0; |
ea98d7f9 AG |
1460 | } |
1461 | EXPORT_SYMBOL(target_submit_tmr); | |
1462 | ||
cdbb70bb | 1463 | /* |
cf572a96 | 1464 | * If the cmd is active, request it to be stopped and sleep until it |
cdbb70bb CH |
1465 | * has completed. |
1466 | */ | |
cf572a96 | 1467 | bool target_stop_cmd(struct se_cmd *cmd, unsigned long *flags) |
cdbb70bb | 1468 | { |
cdbb70bb CH |
1469 | bool was_active = false; |
1470 | ||
cf572a96 CH |
1471 | if (cmd->transport_state & CMD_T_BUSY) { |
1472 | cmd->transport_state |= CMD_T_REQUEST_STOP; | |
cdbb70bb CH |
1473 | spin_unlock_irqrestore(&cmd->t_state_lock, *flags); |
1474 | ||
cf572a96 CH |
1475 | pr_debug("cmd %p waiting to complete\n", cmd); |
1476 | wait_for_completion(&cmd->task_stop_comp); | |
1477 | pr_debug("cmd %p stopped successfully\n", cmd); | |
cdbb70bb CH |
1478 | |
1479 | spin_lock_irqsave(&cmd->t_state_lock, *flags); | |
cf572a96 CH |
1480 | cmd->transport_state &= ~CMD_T_REQUEST_STOP; |
1481 | cmd->transport_state &= ~CMD_T_BUSY; | |
cdbb70bb CH |
1482 | was_active = true; |
1483 | } | |
1484 | ||
cdbb70bb CH |
1485 | return was_active; |
1486 | } | |
1487 | ||
c66ac9db NB |
1488 | /* |
1489 | * Handle SAM-esque emulation for generic transport request failures. | |
1490 | */ | |
de103c93 CH |
1491 | void transport_generic_request_failure(struct se_cmd *cmd, |
1492 | sense_reason_t sense_reason) | |
c66ac9db | 1493 | { |
07bde79a NB |
1494 | int ret = 0; |
1495 | ||
6708bb27 | 1496 | pr_debug("-----[ Storage Engine Exception for cmd: %p ITT: 0x%08x" |
e3d6f909 | 1497 | " CDB: 0x%02x\n", cmd, cmd->se_tfo->get_task_tag(cmd), |
a1d8b49a | 1498 | cmd->t_task_cdb[0]); |
de103c93 | 1499 | pr_debug("-----[ i_state: %d t_state: %d sense_reason: %d\n", |
e3d6f909 | 1500 | cmd->se_tfo->get_cmd_state(cmd), |
de103c93 | 1501 | cmd->t_state, sense_reason); |
d43d6aea | 1502 | pr_debug("-----[ CMD_T_ACTIVE: %d CMD_T_STOP: %d CMD_T_SENT: %d\n", |
7d680f3b CH |
1503 | (cmd->transport_state & CMD_T_ACTIVE) != 0, |
1504 | (cmd->transport_state & CMD_T_STOP) != 0, | |
1505 | (cmd->transport_state & CMD_T_SENT) != 0); | |
c66ac9db | 1506 | |
c66ac9db NB |
1507 | /* |
1508 | * For SAM Task Attribute emulation for failed struct se_cmd | |
1509 | */ | |
019c4ca6 | 1510 | transport_complete_task_attr(cmd); |
c66ac9db | 1511 | |
de103c93 | 1512 | switch (sense_reason) { |
03e98c9e NB |
1513 | case TCM_NON_EXISTENT_LUN: |
1514 | case TCM_UNSUPPORTED_SCSI_OPCODE: | |
1515 | case TCM_INVALID_CDB_FIELD: | |
1516 | case TCM_INVALID_PARAMETER_LIST: | |
1517 | case TCM_LOGICAL_UNIT_COMMUNICATION_FAILURE: | |
1518 | case TCM_UNKNOWN_MODE_PAGE: | |
1519 | case TCM_WRITE_PROTECTED: | |
e2397c70 | 1520 | case TCM_ADDRESS_OUT_OF_RANGE: |
03e98c9e NB |
1521 | case TCM_CHECK_CONDITION_ABORT_CMD: |
1522 | case TCM_CHECK_CONDITION_UNIT_ATTENTION: | |
1523 | case TCM_CHECK_CONDITION_NOT_READY: | |
c66ac9db | 1524 | break; |
de103c93 CH |
1525 | case TCM_OUT_OF_RESOURCES: |
1526 | sense_reason = TCM_LOGICAL_UNIT_COMMUNICATION_FAILURE; | |
1527 | break; | |
03e98c9e | 1528 | case TCM_RESERVATION_CONFLICT: |
c66ac9db NB |
1529 | /* |
1530 | * No SENSE Data payload for this case, set SCSI Status | |
1531 | * and queue the response to $FABRIC_MOD. | |
1532 | * | |
1533 | * Uses linux/include/scsi/scsi.h SAM status codes defs | |
1534 | */ | |
1535 | cmd->scsi_status = SAM_STAT_RESERVATION_CONFLICT; | |
1536 | /* | |
1537 | * For UA Interlock Code 11b, a RESERVATION CONFLICT will | |
1538 | * establish a UNIT ATTENTION with PREVIOUS RESERVATION | |
1539 | * CONFLICT STATUS. | |
1540 | * | |
1541 | * See spc4r17, section 7.4.6 Control Mode Page, Table 349 | |
1542 | */ | |
e3d6f909 | 1543 | if (cmd->se_sess && |
0fd97ccf | 1544 | cmd->se_dev->dev_attrib.emulate_ua_intlck_ctrl == 2) |
e3d6f909 | 1545 | core_scsi3_ua_allocate(cmd->se_sess->se_node_acl, |
c66ac9db NB |
1546 | cmd->orig_fe_lun, 0x2C, |
1547 | ASCQ_2CH_PREVIOUS_RESERVATION_CONFLICT_STATUS); | |
1548 | ||
07bde79a | 1549 | ret = cmd->se_tfo->queue_status(cmd); |
f147abb4 | 1550 | if (ret == -EAGAIN || ret == -ENOMEM) |
07bde79a | 1551 | goto queue_full; |
c66ac9db | 1552 | goto check_stop; |
c66ac9db | 1553 | default: |
6708bb27 | 1554 | pr_err("Unknown transport error for CDB 0x%02x: %d\n", |
de103c93 CH |
1555 | cmd->t_task_cdb[0], sense_reason); |
1556 | sense_reason = TCM_UNSUPPORTED_SCSI_OPCODE; | |
c66ac9db NB |
1557 | break; |
1558 | } | |
f3146437 | 1559 | |
de103c93 | 1560 | ret = transport_send_check_condition_and_sense(cmd, sense_reason, 0); |
03e98c9e NB |
1561 | if (ret == -EAGAIN || ret == -ENOMEM) |
1562 | goto queue_full; | |
07bde79a | 1563 | |
c66ac9db NB |
1564 | check_stop: |
1565 | transport_lun_remove_cmd(cmd); | |
6708bb27 | 1566 | if (!transport_cmd_check_stop_to_fabric(cmd)) |
c66ac9db | 1567 | ; |
07bde79a NB |
1568 | return; |
1569 | ||
1570 | queue_full: | |
e057f533 CH |
1571 | cmd->t_state = TRANSPORT_COMPLETE_QF_OK; |
1572 | transport_handle_queue_full(cmd, cmd->se_dev); | |
c66ac9db | 1573 | } |
2fbff127 | 1574 | EXPORT_SYMBOL(transport_generic_request_failure); |
c66ac9db | 1575 | |
5f41a31d | 1576 | static void __target_execute_cmd(struct se_cmd *cmd) |
c66ac9db | 1577 | { |
de103c93 | 1578 | sense_reason_t ret; |
5f41a31d CH |
1579 | |
1580 | spin_lock_irq(&cmd->t_state_lock); | |
1581 | cmd->transport_state |= (CMD_T_BUSY|CMD_T_SENT); | |
1582 | spin_unlock_irq(&cmd->t_state_lock); | |
1583 | ||
de103c93 CH |
1584 | if (cmd->execute_cmd) { |
1585 | ret = cmd->execute_cmd(cmd); | |
1586 | if (ret) { | |
1587 | spin_lock_irq(&cmd->t_state_lock); | |
1588 | cmd->transport_state &= ~(CMD_T_BUSY|CMD_T_SENT); | |
1589 | spin_unlock_irq(&cmd->t_state_lock); | |
5f41a31d | 1590 | |
de103c93 CH |
1591 | transport_generic_request_failure(cmd, ret); |
1592 | } | |
5f41a31d CH |
1593 | } |
1594 | } | |
1595 | ||
019c4ca6 | 1596 | static bool target_handle_task_attr(struct se_cmd *cmd) |
5f41a31d CH |
1597 | { |
1598 | struct se_device *dev = cmd->se_dev; | |
1599 | ||
019c4ca6 CH |
1600 | if (dev->transport->transport_type == TRANSPORT_PLUGIN_PHBA_PDEV) |
1601 | return false; | |
5f41a31d | 1602 | |
c66ac9db | 1603 | /* |
25985edc | 1604 | * Check for the existence of HEAD_OF_QUEUE, and if true return 1 |
c66ac9db NB |
1605 | * to allow the passed struct se_cmd list of tasks to the front of the list. |
1606 | */ | |
5f41a31d CH |
1607 | switch (cmd->sam_task_attr) { |
1608 | case MSG_HEAD_TAG: | |
1609 | pr_debug("Added HEAD_OF_QUEUE for CDB: 0x%02x, " | |
1610 | "se_ordered_id: %u\n", | |
1611 | cmd->t_task_cdb[0], cmd->se_ordered_id); | |
019c4ca6 | 1612 | return false; |
5f41a31d CH |
1613 | case MSG_ORDERED_TAG: |
1614 | atomic_inc(&dev->dev_ordered_sync); | |
c66ac9db NB |
1615 | smp_mb__after_atomic_inc(); |
1616 | ||
5f41a31d CH |
1617 | pr_debug("Added ORDERED for CDB: 0x%02x to ordered list, " |
1618 | " se_ordered_id: %u\n", | |
1619 | cmd->t_task_cdb[0], cmd->se_ordered_id); | |
1620 | ||
c66ac9db | 1621 | /* |
5f41a31d CH |
1622 | * Execute an ORDERED command if no other older commands |
1623 | * exist that need to be completed first. | |
c66ac9db | 1624 | */ |
5f41a31d | 1625 | if (!atomic_read(&dev->simple_cmds)) |
019c4ca6 | 1626 | return false; |
5f41a31d CH |
1627 | break; |
1628 | default: | |
c66ac9db NB |
1629 | /* |
1630 | * For SIMPLE and UNTAGGED Task Attribute commands | |
1631 | */ | |
5f41a31d | 1632 | atomic_inc(&dev->simple_cmds); |
c66ac9db | 1633 | smp_mb__after_atomic_inc(); |
5f41a31d | 1634 | break; |
c66ac9db | 1635 | } |
5f41a31d | 1636 | |
019c4ca6 CH |
1637 | if (atomic_read(&dev->dev_ordered_sync) == 0) |
1638 | return false; | |
c66ac9db | 1639 | |
019c4ca6 CH |
1640 | spin_lock(&dev->delayed_cmd_lock); |
1641 | list_add_tail(&cmd->se_delayed_node, &dev->delayed_cmd_list); | |
1642 | spin_unlock(&dev->delayed_cmd_lock); | |
1643 | ||
1644 | pr_debug("Added CDB: 0x%02x Task Attr: 0x%02x to" | |
1645 | " delayed CMD list, se_ordered_id: %u\n", | |
1646 | cmd->t_task_cdb[0], cmd->sam_task_attr, | |
1647 | cmd->se_ordered_id); | |
1648 | return true; | |
1649 | } | |
1650 | ||
1651 | void target_execute_cmd(struct se_cmd *cmd) | |
1652 | { | |
1653 | /* | |
1654 | * If the received CDB has aleady been aborted stop processing it here. | |
1655 | */ | |
5bd665f2 LT |
1656 | if (transport_check_aborted_status(cmd, 1)) { |
1657 | complete(&cmd->transport_lun_stop_comp); | |
5f41a31d | 1658 | return; |
c66ac9db | 1659 | } |
c66ac9db | 1660 | |
c66ac9db | 1661 | /* |
019c4ca6 CH |
1662 | * Determine if IOCTL context caller in requesting the stopping of this |
1663 | * command for LUN shutdown purposes. | |
c66ac9db | 1664 | */ |
019c4ca6 CH |
1665 | spin_lock_irq(&cmd->t_state_lock); |
1666 | if (cmd->transport_state & CMD_T_LUN_STOP) { | |
1667 | pr_debug("%s:%d CMD_T_LUN_STOP for ITT: 0x%08x\n", | |
1668 | __func__, __LINE__, cmd->se_tfo->get_task_tag(cmd)); | |
1669 | ||
1670 | cmd->transport_state &= ~CMD_T_ACTIVE; | |
1671 | spin_unlock_irq(&cmd->t_state_lock); | |
1672 | complete(&cmd->transport_lun_stop_comp); | |
1673 | return; | |
1674 | } | |
1675 | /* | |
1676 | * Determine if frontend context caller is requesting the stopping of | |
1677 | * this command for frontend exceptions. | |
1678 | */ | |
1679 | if (cmd->transport_state & CMD_T_STOP) { | |
1680 | pr_debug("%s:%d CMD_T_STOP for ITT: 0x%08x\n", | |
1681 | __func__, __LINE__, | |
1682 | cmd->se_tfo->get_task_tag(cmd)); | |
1683 | ||
1684 | spin_unlock_irq(&cmd->t_state_lock); | |
1685 | complete(&cmd->t_transport_stop_comp); | |
1686 | return; | |
1687 | } | |
1688 | ||
1689 | cmd->t_state = TRANSPORT_PROCESSING; | |
e627c615 | 1690 | cmd->transport_state |= CMD_T_ACTIVE; |
019c4ca6 CH |
1691 | spin_unlock_irq(&cmd->t_state_lock); |
1692 | ||
1693 | if (!target_handle_task_attr(cmd)) | |
1694 | __target_execute_cmd(cmd); | |
c66ac9db | 1695 | } |
70baf0ab | 1696 | EXPORT_SYMBOL(target_execute_cmd); |
c66ac9db | 1697 | |
5f41a31d CH |
1698 | /* |
1699 | * Process all commands up to the last received ORDERED task attribute which | |
1700 | * requires another blocking boundary | |
1701 | */ | |
1702 | static void target_restart_delayed_cmds(struct se_device *dev) | |
1703 | { | |
1704 | for (;;) { | |
1705 | struct se_cmd *cmd; | |
1706 | ||
1707 | spin_lock(&dev->delayed_cmd_lock); | |
1708 | if (list_empty(&dev->delayed_cmd_list)) { | |
1709 | spin_unlock(&dev->delayed_cmd_lock); | |
1710 | break; | |
1711 | } | |
1712 | ||
1713 | cmd = list_entry(dev->delayed_cmd_list.next, | |
1714 | struct se_cmd, se_delayed_node); | |
1715 | list_del(&cmd->se_delayed_node); | |
1716 | spin_unlock(&dev->delayed_cmd_lock); | |
1717 | ||
1718 | __target_execute_cmd(cmd); | |
1719 | ||
1720 | if (cmd->sam_task_attr == MSG_ORDERED_TAG) | |
1721 | break; | |
1722 | } | |
1723 | } | |
1724 | ||
c66ac9db | 1725 | /* |
35e0e757 | 1726 | * Called from I/O completion to determine which dormant/delayed |
c66ac9db NB |
1727 | * and ordered cmds need to have their tasks added to the execution queue. |
1728 | */ | |
1729 | static void transport_complete_task_attr(struct se_cmd *cmd) | |
1730 | { | |
5951146d | 1731 | struct se_device *dev = cmd->se_dev; |
c66ac9db | 1732 | |
019c4ca6 CH |
1733 | if (dev->transport->transport_type == TRANSPORT_PLUGIN_PHBA_PDEV) |
1734 | return; | |
1735 | ||
e66ecd50 | 1736 | if (cmd->sam_task_attr == MSG_SIMPLE_TAG) { |
c66ac9db NB |
1737 | atomic_dec(&dev->simple_cmds); |
1738 | smp_mb__after_atomic_dec(); | |
1739 | dev->dev_cur_ordered_id++; | |
6708bb27 | 1740 | pr_debug("Incremented dev->dev_cur_ordered_id: %u for" |
c66ac9db NB |
1741 | " SIMPLE: %u\n", dev->dev_cur_ordered_id, |
1742 | cmd->se_ordered_id); | |
e66ecd50 | 1743 | } else if (cmd->sam_task_attr == MSG_HEAD_TAG) { |
c66ac9db | 1744 | dev->dev_cur_ordered_id++; |
6708bb27 | 1745 | pr_debug("Incremented dev_cur_ordered_id: %u for" |
c66ac9db NB |
1746 | " HEAD_OF_QUEUE: %u\n", dev->dev_cur_ordered_id, |
1747 | cmd->se_ordered_id); | |
e66ecd50 | 1748 | } else if (cmd->sam_task_attr == MSG_ORDERED_TAG) { |
c66ac9db NB |
1749 | atomic_dec(&dev->dev_ordered_sync); |
1750 | smp_mb__after_atomic_dec(); | |
c66ac9db NB |
1751 | |
1752 | dev->dev_cur_ordered_id++; | |
6708bb27 | 1753 | pr_debug("Incremented dev_cur_ordered_id: %u for ORDERED:" |
c66ac9db NB |
1754 | " %u\n", dev->dev_cur_ordered_id, cmd->se_ordered_id); |
1755 | } | |
c66ac9db | 1756 | |
5f41a31d | 1757 | target_restart_delayed_cmds(dev); |
c66ac9db NB |
1758 | } |
1759 | ||
e057f533 | 1760 | static void transport_complete_qf(struct se_cmd *cmd) |
07bde79a NB |
1761 | { |
1762 | int ret = 0; | |
1763 | ||
019c4ca6 | 1764 | transport_complete_task_attr(cmd); |
e057f533 CH |
1765 | |
1766 | if (cmd->se_cmd_flags & SCF_TRANSPORT_TASK_SENSE) { | |
1767 | ret = cmd->se_tfo->queue_status(cmd); | |
1768 | if (ret) | |
1769 | goto out; | |
1770 | } | |
07bde79a NB |
1771 | |
1772 | switch (cmd->data_direction) { | |
1773 | case DMA_FROM_DEVICE: | |
1774 | ret = cmd->se_tfo->queue_data_in(cmd); | |
1775 | break; | |
1776 | case DMA_TO_DEVICE: | |
ec98f782 | 1777 | if (cmd->t_bidi_data_sg) { |
07bde79a NB |
1778 | ret = cmd->se_tfo->queue_data_in(cmd); |
1779 | if (ret < 0) | |
e057f533 | 1780 | break; |
07bde79a NB |
1781 | } |
1782 | /* Fall through for DMA_TO_DEVICE */ | |
1783 | case DMA_NONE: | |
1784 | ret = cmd->se_tfo->queue_status(cmd); | |
1785 | break; | |
1786 | default: | |
1787 | break; | |
1788 | } | |
1789 | ||
e057f533 CH |
1790 | out: |
1791 | if (ret < 0) { | |
1792 | transport_handle_queue_full(cmd, cmd->se_dev); | |
1793 | return; | |
1794 | } | |
1795 | transport_lun_remove_cmd(cmd); | |
1796 | transport_cmd_check_stop_to_fabric(cmd); | |
07bde79a NB |
1797 | } |
1798 | ||
1799 | static void transport_handle_queue_full( | |
1800 | struct se_cmd *cmd, | |
e057f533 | 1801 | struct se_device *dev) |
07bde79a NB |
1802 | { |
1803 | spin_lock_irq(&dev->qf_cmd_lock); | |
07bde79a NB |
1804 | list_add_tail(&cmd->se_qf_node, &cmd->se_dev->qf_cmd_list); |
1805 | atomic_inc(&dev->dev_qf_count); | |
1806 | smp_mb__after_atomic_inc(); | |
1807 | spin_unlock_irq(&cmd->se_dev->qf_cmd_lock); | |
1808 | ||
1809 | schedule_work(&cmd->se_dev->qf_work_queue); | |
1810 | } | |
1811 | ||
35e0e757 | 1812 | static void target_complete_ok_work(struct work_struct *work) |
c66ac9db | 1813 | { |
35e0e757 | 1814 | struct se_cmd *cmd = container_of(work, struct se_cmd, work); |
27a27099 | 1815 | int ret; |
35e0e757 | 1816 | |
c66ac9db NB |
1817 | /* |
1818 | * Check if we need to move delayed/dormant tasks from cmds on the | |
1819 | * delayed execution list after a HEAD_OF_QUEUE or ORDERED Task | |
1820 | * Attribute. | |
1821 | */ | |
019c4ca6 CH |
1822 | transport_complete_task_attr(cmd); |
1823 | ||
07bde79a NB |
1824 | /* |
1825 | * Check to schedule QUEUE_FULL work, or execute an existing | |
1826 | * cmd->transport_qf_callback() | |
1827 | */ | |
1828 | if (atomic_read(&cmd->se_dev->dev_qf_count) != 0) | |
1829 | schedule_work(&cmd->se_dev->qf_work_queue); | |
1830 | ||
c66ac9db | 1831 | /* |
d5829eac | 1832 | * Check if we need to send a sense buffer from |
c66ac9db NB |
1833 | * the struct se_cmd in question. |
1834 | */ | |
1835 | if (cmd->se_cmd_flags & SCF_TRANSPORT_TASK_SENSE) { | |
27a27099 | 1836 | WARN_ON(!cmd->scsi_status); |
27a27099 PB |
1837 | ret = transport_send_check_condition_and_sense( |
1838 | cmd, 0, 1); | |
1839 | if (ret == -EAGAIN || ret == -ENOMEM) | |
1840 | goto queue_full; | |
1841 | ||
1842 | transport_lun_remove_cmd(cmd); | |
1843 | transport_cmd_check_stop_to_fabric(cmd); | |
1844 | return; | |
c66ac9db NB |
1845 | } |
1846 | /* | |
25985edc | 1847 | * Check for a callback, used by amongst other things |
c66ac9db NB |
1848 | * XDWRITE_READ_10 emulation. |
1849 | */ | |
1850 | if (cmd->transport_complete_callback) | |
1851 | cmd->transport_complete_callback(cmd); | |
1852 | ||
1853 | switch (cmd->data_direction) { | |
1854 | case DMA_FROM_DEVICE: | |
1855 | spin_lock(&cmd->se_lun->lun_sep_lock); | |
e3d6f909 AG |
1856 | if (cmd->se_lun->lun_sep) { |
1857 | cmd->se_lun->lun_sep->sep_stats.tx_data_octets += | |
c66ac9db NB |
1858 | cmd->data_length; |
1859 | } | |
1860 | spin_unlock(&cmd->se_lun->lun_sep_lock); | |
c66ac9db | 1861 | |
07bde79a | 1862 | ret = cmd->se_tfo->queue_data_in(cmd); |
f147abb4 | 1863 | if (ret == -EAGAIN || ret == -ENOMEM) |
07bde79a | 1864 | goto queue_full; |
c66ac9db NB |
1865 | break; |
1866 | case DMA_TO_DEVICE: | |
1867 | spin_lock(&cmd->se_lun->lun_sep_lock); | |
e3d6f909 AG |
1868 | if (cmd->se_lun->lun_sep) { |
1869 | cmd->se_lun->lun_sep->sep_stats.rx_data_octets += | |
c66ac9db NB |
1870 | cmd->data_length; |
1871 | } | |
1872 | spin_unlock(&cmd->se_lun->lun_sep_lock); | |
1873 | /* | |
1874 | * Check if we need to send READ payload for BIDI-COMMAND | |
1875 | */ | |
ec98f782 | 1876 | if (cmd->t_bidi_data_sg) { |
c66ac9db | 1877 | spin_lock(&cmd->se_lun->lun_sep_lock); |
e3d6f909 AG |
1878 | if (cmd->se_lun->lun_sep) { |
1879 | cmd->se_lun->lun_sep->sep_stats.tx_data_octets += | |
c66ac9db NB |
1880 | cmd->data_length; |
1881 | } | |
1882 | spin_unlock(&cmd->se_lun->lun_sep_lock); | |
07bde79a | 1883 | ret = cmd->se_tfo->queue_data_in(cmd); |
f147abb4 | 1884 | if (ret == -EAGAIN || ret == -ENOMEM) |
07bde79a | 1885 | goto queue_full; |
c66ac9db NB |
1886 | break; |
1887 | } | |
1888 | /* Fall through for DMA_TO_DEVICE */ | |
1889 | case DMA_NONE: | |
07bde79a | 1890 | ret = cmd->se_tfo->queue_status(cmd); |
f147abb4 | 1891 | if (ret == -EAGAIN || ret == -ENOMEM) |
07bde79a | 1892 | goto queue_full; |
c66ac9db NB |
1893 | break; |
1894 | default: | |
1895 | break; | |
1896 | } | |
1897 | ||
1898 | transport_lun_remove_cmd(cmd); | |
1899 | transport_cmd_check_stop_to_fabric(cmd); | |
07bde79a NB |
1900 | return; |
1901 | ||
1902 | queue_full: | |
6708bb27 | 1903 | pr_debug("Handling complete_ok QUEUE_FULL: se_cmd: %p," |
07bde79a | 1904 | " data_direction: %d\n", cmd, cmd->data_direction); |
e057f533 CH |
1905 | cmd->t_state = TRANSPORT_COMPLETE_QF_OK; |
1906 | transport_handle_queue_full(cmd, cmd->se_dev); | |
c66ac9db NB |
1907 | } |
1908 | ||
6708bb27 | 1909 | static inline void transport_free_sgl(struct scatterlist *sgl, int nents) |
c66ac9db | 1910 | { |
ec98f782 | 1911 | struct scatterlist *sg; |
ec98f782 | 1912 | int count; |
c66ac9db | 1913 | |
6708bb27 AG |
1914 | for_each_sg(sgl, sg, nents, count) |
1915 | __free_page(sg_page(sg)); | |
c66ac9db | 1916 | |
6708bb27 AG |
1917 | kfree(sgl); |
1918 | } | |
c66ac9db | 1919 | |
6708bb27 AG |
1920 | static inline void transport_free_pages(struct se_cmd *cmd) |
1921 | { | |
1922 | if (cmd->se_cmd_flags & SCF_PASSTHROUGH_SG_TO_MEM_NOALLOC) | |
1923 | return; | |
1924 | ||
1925 | transport_free_sgl(cmd->t_data_sg, cmd->t_data_nents); | |
ec98f782 AG |
1926 | cmd->t_data_sg = NULL; |
1927 | cmd->t_data_nents = 0; | |
c66ac9db | 1928 | |
6708bb27 | 1929 | transport_free_sgl(cmd->t_bidi_data_sg, cmd->t_bidi_data_nents); |
ec98f782 AG |
1930 | cmd->t_bidi_data_sg = NULL; |
1931 | cmd->t_bidi_data_nents = 0; | |
c66ac9db NB |
1932 | } |
1933 | ||
e26d99ae CH |
1934 | /** |
1935 | * transport_release_cmd - free a command | |
1936 | * @cmd: command to free | |
1937 | * | |
1938 | * This routine unconditionally frees a command, and reference counting | |
1939 | * or list removal must be done in the caller. | |
1940 | */ | |
1941 | static void transport_release_cmd(struct se_cmd *cmd) | |
1942 | { | |
1943 | BUG_ON(!cmd->se_tfo); | |
1944 | ||
c8e31f26 | 1945 | if (cmd->se_cmd_flags & SCF_SCSI_TMR_CDB) |
e26d99ae CH |
1946 | core_tmr_release_req(cmd->se_tmr_req); |
1947 | if (cmd->t_task_cdb != cmd->__t_task_cdb) | |
1948 | kfree(cmd->t_task_cdb); | |
1949 | /* | |
7481deb4 NB |
1950 | * If this cmd has been setup with target_get_sess_cmd(), drop |
1951 | * the kref and call ->release_cmd() in kref callback. | |
e26d99ae | 1952 | */ |
7481deb4 NB |
1953 | if (cmd->check_release != 0) { |
1954 | target_put_sess_cmd(cmd->se_sess, cmd); | |
1955 | return; | |
1956 | } | |
e26d99ae CH |
1957 | cmd->se_tfo->release_cmd(cmd); |
1958 | } | |
1959 | ||
d3df7825 CH |
1960 | /** |
1961 | * transport_put_cmd - release a reference to a command | |
1962 | * @cmd: command to release | |
1963 | * | |
1964 | * This routine releases our reference to the command and frees it if possible. | |
1965 | */ | |
39c05f32 | 1966 | static void transport_put_cmd(struct se_cmd *cmd) |
c66ac9db NB |
1967 | { |
1968 | unsigned long flags; | |
c66ac9db | 1969 | |
a1d8b49a | 1970 | spin_lock_irqsave(&cmd->t_state_lock, flags); |
d9ed6947 RD |
1971 | if (atomic_read(&cmd->t_fe_count) && |
1972 | !atomic_dec_and_test(&cmd->t_fe_count)) { | |
1973 | spin_unlock_irqrestore(&cmd->t_state_lock, flags); | |
1974 | return; | |
4911e3cc CH |
1975 | } |
1976 | ||
7d680f3b CH |
1977 | if (cmd->transport_state & CMD_T_DEV_ACTIVE) { |
1978 | cmd->transport_state &= ~CMD_T_DEV_ACTIVE; | |
cf572a96 | 1979 | target_remove_from_state_list(cmd); |
c66ac9db | 1980 | } |
a1d8b49a | 1981 | spin_unlock_irqrestore(&cmd->t_state_lock, flags); |
c66ac9db | 1982 | |
c66ac9db | 1983 | transport_free_pages(cmd); |
31afc39c | 1984 | transport_release_cmd(cmd); |
39c05f32 | 1985 | return; |
c66ac9db | 1986 | } |
c66ac9db | 1987 | |
4949314c | 1988 | void *transport_kmap_data_sg(struct se_cmd *cmd) |
05d1c7c0 | 1989 | { |
ec98f782 | 1990 | struct scatterlist *sg = cmd->t_data_sg; |
4949314c AG |
1991 | struct page **pages; |
1992 | int i; | |
05d1c7c0 AG |
1993 | |
1994 | /* | |
ec98f782 AG |
1995 | * We need to take into account a possible offset here for fabrics like |
1996 | * tcm_loop who may be using a contig buffer from the SCSI midlayer for | |
1997 | * control CDBs passed as SGLs via transport_generic_map_mem_to_cmd() | |
05d1c7c0 | 1998 | */ |
4949314c AG |
1999 | if (!cmd->t_data_nents) |
2000 | return NULL; | |
3717ef0c PB |
2001 | |
2002 | BUG_ON(!sg); | |
2003 | if (cmd->t_data_nents == 1) | |
4949314c AG |
2004 | return kmap(sg_page(sg)) + sg->offset; |
2005 | ||
2006 | /* >1 page. use vmap */ | |
2007 | pages = kmalloc(sizeof(*pages) * cmd->t_data_nents, GFP_KERNEL); | |
de103c93 | 2008 | if (!pages) |
4949314c AG |
2009 | return NULL; |
2010 | ||
2011 | /* convert sg[] to pages[] */ | |
2012 | for_each_sg(cmd->t_data_sg, sg, cmd->t_data_nents, i) { | |
2013 | pages[i] = sg_page(sg); | |
2014 | } | |
2015 | ||
2016 | cmd->t_data_vmap = vmap(pages, cmd->t_data_nents, VM_MAP, PAGE_KERNEL); | |
2017 | kfree(pages); | |
de103c93 | 2018 | if (!cmd->t_data_vmap) |
4949314c AG |
2019 | return NULL; |
2020 | ||
2021 | return cmd->t_data_vmap + cmd->t_data_sg[0].offset; | |
05d1c7c0 | 2022 | } |
4949314c | 2023 | EXPORT_SYMBOL(transport_kmap_data_sg); |
05d1c7c0 | 2024 | |
4949314c | 2025 | void transport_kunmap_data_sg(struct se_cmd *cmd) |
05d1c7c0 | 2026 | { |
a1edf9cf | 2027 | if (!cmd->t_data_nents) { |
4949314c | 2028 | return; |
a1edf9cf | 2029 | } else if (cmd->t_data_nents == 1) { |
4949314c | 2030 | kunmap(sg_page(cmd->t_data_sg)); |
a1edf9cf AG |
2031 | return; |
2032 | } | |
4949314c AG |
2033 | |
2034 | vunmap(cmd->t_data_vmap); | |
2035 | cmd->t_data_vmap = NULL; | |
05d1c7c0 | 2036 | } |
4949314c | 2037 | EXPORT_SYMBOL(transport_kunmap_data_sg); |
05d1c7c0 | 2038 | |
c66ac9db | 2039 | static int |
05d1c7c0 | 2040 | transport_generic_get_mem(struct se_cmd *cmd) |
c66ac9db | 2041 | { |
ec98f782 AG |
2042 | u32 length = cmd->data_length; |
2043 | unsigned int nents; | |
2044 | struct page *page; | |
9db9da33 | 2045 | gfp_t zero_flag; |
ec98f782 | 2046 | int i = 0; |
c66ac9db | 2047 | |
ec98f782 AG |
2048 | nents = DIV_ROUND_UP(length, PAGE_SIZE); |
2049 | cmd->t_data_sg = kmalloc(sizeof(struct scatterlist) * nents, GFP_KERNEL); | |
2050 | if (!cmd->t_data_sg) | |
2051 | return -ENOMEM; | |
c66ac9db | 2052 | |
ec98f782 AG |
2053 | cmd->t_data_nents = nents; |
2054 | sg_init_table(cmd->t_data_sg, nents); | |
c66ac9db | 2055 | |
64f1db38 | 2056 | zero_flag = cmd->se_cmd_flags & SCF_SCSI_DATA_CDB ? 0 : __GFP_ZERO; |
9db9da33 | 2057 | |
ec98f782 AG |
2058 | while (length) { |
2059 | u32 page_len = min_t(u32, length, PAGE_SIZE); | |
9db9da33 | 2060 | page = alloc_page(GFP_KERNEL | zero_flag); |
ec98f782 AG |
2061 | if (!page) |
2062 | goto out; | |
c66ac9db | 2063 | |
ec98f782 AG |
2064 | sg_set_page(&cmd->t_data_sg[i], page, page_len, 0); |
2065 | length -= page_len; | |
2066 | i++; | |
c66ac9db | 2067 | } |
c66ac9db | 2068 | return 0; |
c66ac9db | 2069 | |
ec98f782 | 2070 | out: |
d0e27c88 | 2071 | while (i > 0) { |
ec98f782 | 2072 | i--; |
d0e27c88 | 2073 | __free_page(sg_page(&cmd->t_data_sg[i])); |
c66ac9db | 2074 | } |
ec98f782 AG |
2075 | kfree(cmd->t_data_sg); |
2076 | cmd->t_data_sg = NULL; | |
2077 | return -ENOMEM; | |
c66ac9db NB |
2078 | } |
2079 | ||
da0f7619 | 2080 | /* |
b16a35b0 AG |
2081 | * Allocate any required resources to execute the command. For writes we |
2082 | * might not have the payload yet, so notify the fabric via a call to | |
2083 | * ->write_pending instead. Otherwise place it on the execution queue. | |
c66ac9db | 2084 | */ |
de103c93 CH |
2085 | sense_reason_t |
2086 | transport_generic_new_cmd(struct se_cmd *cmd) | |
c66ac9db | 2087 | { |
c66ac9db NB |
2088 | int ret = 0; |
2089 | ||
2090 | /* | |
2091 | * Determine is the TCM fabric module has already allocated physical | |
2092 | * memory, and is directly calling transport_generic_map_mem_to_cmd() | |
ec98f782 | 2093 | * beforehand. |
c66ac9db | 2094 | */ |
ec98f782 AG |
2095 | if (!(cmd->se_cmd_flags & SCF_PASSTHROUGH_SG_TO_MEM_NOALLOC) && |
2096 | cmd->data_length) { | |
05d1c7c0 | 2097 | ret = transport_generic_get_mem(cmd); |
c66ac9db | 2098 | if (ret < 0) |
de103c93 | 2099 | return TCM_LOGICAL_UNIT_COMMUNICATION_FAILURE; |
c66ac9db | 2100 | } |
da0f7619 | 2101 | |
4101f0a8 | 2102 | atomic_inc(&cmd->t_fe_count); |
4101f0a8 | 2103 | |
c66ac9db | 2104 | /* |
c3196f0c CH |
2105 | * If this command is not a write we can execute it right here, |
2106 | * for write buffers we need to notify the fabric driver first | |
2107 | * and let it call back once the write buffers are ready. | |
c66ac9db | 2108 | */ |
5f41a31d | 2109 | target_add_to_state_list(cmd); |
c3196f0c CH |
2110 | if (cmd->data_direction != DMA_TO_DEVICE) { |
2111 | target_execute_cmd(cmd); | |
2112 | return 0; | |
2113 | } | |
2114 | ||
2115 | spin_lock_irq(&cmd->t_state_lock); | |
2116 | cmd->t_state = TRANSPORT_WRITE_PENDING; | |
2117 | spin_unlock_irq(&cmd->t_state_lock); | |
2118 | ||
2119 | transport_cmd_check_stop(cmd, false); | |
2120 | ||
2121 | ret = cmd->se_tfo->write_pending(cmd); | |
2122 | if (ret == -EAGAIN || ret == -ENOMEM) | |
2123 | goto queue_full; | |
2124 | ||
de103c93 CH |
2125 | /* fabric drivers should only return -EAGAIN or -ENOMEM as error */ |
2126 | WARN_ON(ret); | |
2127 | ||
b69c1fcf | 2128 | return (!ret) ? 0 : TCM_LOGICAL_UNIT_COMMUNICATION_FAILURE; |
da0f7619 | 2129 | |
c3196f0c CH |
2130 | queue_full: |
2131 | pr_debug("Handling write_pending QUEUE__FULL: se_cmd: %p\n", cmd); | |
2132 | cmd->t_state = TRANSPORT_COMPLETE_QF_WP; | |
2133 | transport_handle_queue_full(cmd, cmd->se_dev); | |
2134 | return 0; | |
c66ac9db | 2135 | } |
a1d8b49a | 2136 | EXPORT_SYMBOL(transport_generic_new_cmd); |
c66ac9db | 2137 | |
e057f533 | 2138 | static void transport_write_pending_qf(struct se_cmd *cmd) |
07bde79a | 2139 | { |
f147abb4 NB |
2140 | int ret; |
2141 | ||
2142 | ret = cmd->se_tfo->write_pending(cmd); | |
2143 | if (ret == -EAGAIN || ret == -ENOMEM) { | |
e057f533 CH |
2144 | pr_debug("Handling write_pending QUEUE__FULL: se_cmd: %p\n", |
2145 | cmd); | |
2146 | transport_handle_queue_full(cmd, cmd->se_dev); | |
2147 | } | |
07bde79a NB |
2148 | } |
2149 | ||
39c05f32 | 2150 | void transport_generic_free_cmd(struct se_cmd *cmd, int wait_for_tasks) |
c66ac9db | 2151 | { |
d14921d6 | 2152 | if (!(cmd->se_cmd_flags & SCF_SE_LUN_CMD)) { |
c8e31f26 | 2153 | if (wait_for_tasks && (cmd->se_cmd_flags & SCF_SCSI_TMR_CDB)) |
d14921d6 NB |
2154 | transport_wait_for_tasks(cmd); |
2155 | ||
35462975 | 2156 | transport_release_cmd(cmd); |
d14921d6 NB |
2157 | } else { |
2158 | if (wait_for_tasks) | |
2159 | transport_wait_for_tasks(cmd); | |
2160 | ||
c66ac9db NB |
2161 | core_dec_lacl_count(cmd->se_sess->se_node_acl, cmd); |
2162 | ||
82f1c8a4 | 2163 | if (cmd->se_lun) |
c66ac9db | 2164 | transport_lun_remove_cmd(cmd); |
c66ac9db | 2165 | |
39c05f32 | 2166 | transport_put_cmd(cmd); |
c66ac9db NB |
2167 | } |
2168 | } | |
2169 | EXPORT_SYMBOL(transport_generic_free_cmd); | |
2170 | ||
a17f091d NB |
2171 | /* target_get_sess_cmd - Add command to active ->sess_cmd_list |
2172 | * @se_sess: session to reference | |
2173 | * @se_cmd: command descriptor to add | |
a6360785 | 2174 | * @ack_kref: Signal that fabric will perform an ack target_put_sess_cmd() |
a17f091d | 2175 | */ |
bc187ea6 RD |
2176 | static int target_get_sess_cmd(struct se_session *se_sess, struct se_cmd *se_cmd, |
2177 | bool ack_kref) | |
a17f091d NB |
2178 | { |
2179 | unsigned long flags; | |
bc187ea6 | 2180 | int ret = 0; |
a17f091d | 2181 | |
7481deb4 | 2182 | kref_init(&se_cmd->cmd_kref); |
a6360785 NB |
2183 | /* |
2184 | * Add a second kref if the fabric caller is expecting to handle | |
2185 | * fabric acknowledgement that requires two target_put_sess_cmd() | |
2186 | * invocations before se_cmd descriptor release. | |
2187 | */ | |
86715569 | 2188 | if (ack_kref == true) { |
a6360785 | 2189 | kref_get(&se_cmd->cmd_kref); |
86715569 NB |
2190 | se_cmd->se_cmd_flags |= SCF_ACK_KREF; |
2191 | } | |
7481deb4 | 2192 | |
a17f091d | 2193 | spin_lock_irqsave(&se_sess->sess_cmd_lock, flags); |
bc187ea6 RD |
2194 | if (se_sess->sess_tearing_down) { |
2195 | ret = -ESHUTDOWN; | |
2196 | goto out; | |
2197 | } | |
a17f091d NB |
2198 | list_add_tail(&se_cmd->se_cmd_list, &se_sess->sess_cmd_list); |
2199 | se_cmd->check_release = 1; | |
bc187ea6 RD |
2200 | |
2201 | out: | |
a17f091d | 2202 | spin_unlock_irqrestore(&se_sess->sess_cmd_lock, flags); |
bc187ea6 | 2203 | return ret; |
a17f091d | 2204 | } |
a17f091d | 2205 | |
7481deb4 | 2206 | static void target_release_cmd_kref(struct kref *kref) |
a17f091d | 2207 | { |
7481deb4 NB |
2208 | struct se_cmd *se_cmd = container_of(kref, struct se_cmd, cmd_kref); |
2209 | struct se_session *se_sess = se_cmd->se_sess; | |
a17f091d NB |
2210 | unsigned long flags; |
2211 | ||
2212 | spin_lock_irqsave(&se_sess->sess_cmd_lock, flags); | |
2213 | if (list_empty(&se_cmd->se_cmd_list)) { | |
2214 | spin_unlock_irqrestore(&se_sess->sess_cmd_lock, flags); | |
ffc32d52 | 2215 | se_cmd->se_tfo->release_cmd(se_cmd); |
7481deb4 | 2216 | return; |
a17f091d | 2217 | } |
a17f091d NB |
2218 | if (se_sess->sess_tearing_down && se_cmd->cmd_wait_set) { |
2219 | spin_unlock_irqrestore(&se_sess->sess_cmd_lock, flags); | |
2220 | complete(&se_cmd->cmd_wait_comp); | |
7481deb4 | 2221 | return; |
a17f091d NB |
2222 | } |
2223 | list_del(&se_cmd->se_cmd_list); | |
2224 | spin_unlock_irqrestore(&se_sess->sess_cmd_lock, flags); | |
2225 | ||
7481deb4 NB |
2226 | se_cmd->se_tfo->release_cmd(se_cmd); |
2227 | } | |
2228 | ||
2229 | /* target_put_sess_cmd - Check for active I/O shutdown via kref_put | |
2230 | * @se_sess: session to reference | |
2231 | * @se_cmd: command descriptor to drop | |
2232 | */ | |
2233 | int target_put_sess_cmd(struct se_session *se_sess, struct se_cmd *se_cmd) | |
2234 | { | |
2235 | return kref_put(&se_cmd->cmd_kref, target_release_cmd_kref); | |
a17f091d NB |
2236 | } |
2237 | EXPORT_SYMBOL(target_put_sess_cmd); | |
2238 | ||
1c7b13fe RD |
2239 | /* target_sess_cmd_list_set_waiting - Flag all commands in |
2240 | * sess_cmd_list to complete cmd_wait_comp. Set | |
2241 | * sess_tearing_down so no more commands are queued. | |
2242 | * @se_sess: session to flag | |
a17f091d | 2243 | */ |
1c7b13fe | 2244 | void target_sess_cmd_list_set_waiting(struct se_session *se_sess) |
a17f091d NB |
2245 | { |
2246 | struct se_cmd *se_cmd; | |
2247 | unsigned long flags; | |
2248 | ||
a17f091d | 2249 | spin_lock_irqsave(&se_sess->sess_cmd_lock, flags); |
a17f091d | 2250 | |
1c7b13fe RD |
2251 | WARN_ON(se_sess->sess_tearing_down); |
2252 | se_sess->sess_tearing_down = 1; | |
a17f091d | 2253 | |
1c7b13fe | 2254 | list_for_each_entry(se_cmd, &se_sess->sess_cmd_list, se_cmd_list) |
a17f091d NB |
2255 | se_cmd->cmd_wait_set = 1; |
2256 | ||
2257 | spin_unlock_irqrestore(&se_sess->sess_cmd_lock, flags); | |
2258 | } | |
1c7b13fe | 2259 | EXPORT_SYMBOL(target_sess_cmd_list_set_waiting); |
a17f091d NB |
2260 | |
2261 | /* target_wait_for_sess_cmds - Wait for outstanding descriptors | |
2262 | * @se_sess: session to wait for active I/O | |
2263 | * @wait_for_tasks: Make extra transport_wait_for_tasks call | |
2264 | */ | |
2265 | void target_wait_for_sess_cmds( | |
2266 | struct se_session *se_sess, | |
2267 | int wait_for_tasks) | |
2268 | { | |
2269 | struct se_cmd *se_cmd, *tmp_cmd; | |
2270 | bool rc = false; | |
2271 | ||
2272 | list_for_each_entry_safe(se_cmd, tmp_cmd, | |
1c7b13fe | 2273 | &se_sess->sess_cmd_list, se_cmd_list) { |
a17f091d NB |
2274 | list_del(&se_cmd->se_cmd_list); |
2275 | ||
2276 | pr_debug("Waiting for se_cmd: %p t_state: %d, fabric state:" | |
2277 | " %d\n", se_cmd, se_cmd->t_state, | |
2278 | se_cmd->se_tfo->get_cmd_state(se_cmd)); | |
2279 | ||
2280 | if (wait_for_tasks) { | |
2281 | pr_debug("Calling transport_wait_for_tasks se_cmd: %p t_state: %d," | |
2282 | " fabric state: %d\n", se_cmd, se_cmd->t_state, | |
2283 | se_cmd->se_tfo->get_cmd_state(se_cmd)); | |
2284 | ||
2285 | rc = transport_wait_for_tasks(se_cmd); | |
2286 | ||
2287 | pr_debug("After transport_wait_for_tasks se_cmd: %p t_state: %d," | |
2288 | " fabric state: %d\n", se_cmd, se_cmd->t_state, | |
2289 | se_cmd->se_tfo->get_cmd_state(se_cmd)); | |
2290 | } | |
2291 | ||
2292 | if (!rc) { | |
2293 | wait_for_completion(&se_cmd->cmd_wait_comp); | |
2294 | pr_debug("After cmd_wait_comp: se_cmd: %p t_state: %d" | |
2295 | " fabric state: %d\n", se_cmd, se_cmd->t_state, | |
2296 | se_cmd->se_tfo->get_cmd_state(se_cmd)); | |
2297 | } | |
2298 | ||
2299 | se_cmd->se_tfo->release_cmd(se_cmd); | |
2300 | } | |
2301 | } | |
2302 | EXPORT_SYMBOL(target_wait_for_sess_cmds); | |
2303 | ||
c66ac9db NB |
2304 | /* transport_lun_wait_for_tasks(): |
2305 | * | |
2306 | * Called from ConfigFS context to stop the passed struct se_cmd to allow | |
2307 | * an struct se_lun to be successfully shutdown. | |
2308 | */ | |
2309 | static int transport_lun_wait_for_tasks(struct se_cmd *cmd, struct se_lun *lun) | |
2310 | { | |
2311 | unsigned long flags; | |
cf572a96 CH |
2312 | int ret = 0; |
2313 | ||
c66ac9db NB |
2314 | /* |
2315 | * If the frontend has already requested this struct se_cmd to | |
2316 | * be stopped, we can safely ignore this struct se_cmd. | |
2317 | */ | |
a1d8b49a | 2318 | spin_lock_irqsave(&cmd->t_state_lock, flags); |
7d680f3b CH |
2319 | if (cmd->transport_state & CMD_T_STOP) { |
2320 | cmd->transport_state &= ~CMD_T_LUN_STOP; | |
2321 | ||
2322 | pr_debug("ConfigFS ITT[0x%08x] - CMD_T_STOP, skipping\n", | |
2323 | cmd->se_tfo->get_task_tag(cmd)); | |
a1d8b49a | 2324 | spin_unlock_irqrestore(&cmd->t_state_lock, flags); |
f7113a47 | 2325 | transport_cmd_check_stop(cmd, false); |
e3d6f909 | 2326 | return -EPERM; |
c66ac9db | 2327 | } |
7d680f3b | 2328 | cmd->transport_state |= CMD_T_LUN_FE_STOP; |
a1d8b49a | 2329 | spin_unlock_irqrestore(&cmd->t_state_lock, flags); |
c66ac9db | 2330 | |
cf572a96 CH |
2331 | // XXX: audit task_flags checks. |
2332 | spin_lock_irqsave(&cmd->t_state_lock, flags); | |
2333 | if ((cmd->transport_state & CMD_T_BUSY) && | |
2334 | (cmd->transport_state & CMD_T_SENT)) { | |
2335 | if (!target_stop_cmd(cmd, &flags)) | |
2336 | ret++; | |
cf572a96 | 2337 | } |
5f41a31d | 2338 | spin_unlock_irqrestore(&cmd->t_state_lock, flags); |
c66ac9db | 2339 | |
785fdf70 CH |
2340 | pr_debug("ConfigFS: cmd: %p stop tasks ret:" |
2341 | " %d\n", cmd, ret); | |
c66ac9db | 2342 | if (!ret) { |
6708bb27 | 2343 | pr_debug("ConfigFS: ITT[0x%08x] - stopping cmd....\n", |
e3d6f909 | 2344 | cmd->se_tfo->get_task_tag(cmd)); |
a1d8b49a | 2345 | wait_for_completion(&cmd->transport_lun_stop_comp); |
6708bb27 | 2346 | pr_debug("ConfigFS: ITT[0x%08x] - stopped cmd....\n", |
e3d6f909 | 2347 | cmd->se_tfo->get_task_tag(cmd)); |
c66ac9db | 2348 | } |
c66ac9db NB |
2349 | |
2350 | return 0; | |
2351 | } | |
2352 | ||
c66ac9db NB |
2353 | static void __transport_clear_lun_from_sessions(struct se_lun *lun) |
2354 | { | |
2355 | struct se_cmd *cmd = NULL; | |
2356 | unsigned long lun_flags, cmd_flags; | |
2357 | /* | |
2358 | * Do exception processing and return CHECK_CONDITION status to the | |
2359 | * Initiator Port. | |
2360 | */ | |
2361 | spin_lock_irqsave(&lun->lun_cmd_lock, lun_flags); | |
5951146d AG |
2362 | while (!list_empty(&lun->lun_cmd_list)) { |
2363 | cmd = list_first_entry(&lun->lun_cmd_list, | |
2364 | struct se_cmd, se_lun_node); | |
3d26fea0 | 2365 | list_del_init(&cmd->se_lun_node); |
5951146d | 2366 | |
a1d8b49a | 2367 | spin_lock(&cmd->t_state_lock); |
6708bb27 | 2368 | pr_debug("SE_LUN[%d] - Setting cmd->transport" |
c66ac9db | 2369 | "_lun_stop for ITT: 0x%08x\n", |
e3d6f909 AG |
2370 | cmd->se_lun->unpacked_lun, |
2371 | cmd->se_tfo->get_task_tag(cmd)); | |
7d680f3b | 2372 | cmd->transport_state |= CMD_T_LUN_STOP; |
a1d8b49a | 2373 | spin_unlock(&cmd->t_state_lock); |
c66ac9db NB |
2374 | |
2375 | spin_unlock_irqrestore(&lun->lun_cmd_lock, lun_flags); | |
2376 | ||
6708bb27 AG |
2377 | if (!cmd->se_lun) { |
2378 | pr_err("ITT: 0x%08x, [i,t]_state: %u/%u\n", | |
e3d6f909 AG |
2379 | cmd->se_tfo->get_task_tag(cmd), |
2380 | cmd->se_tfo->get_cmd_state(cmd), cmd->t_state); | |
c66ac9db NB |
2381 | BUG(); |
2382 | } | |
2383 | /* | |
2384 | * If the Storage engine still owns the iscsi_cmd_t, determine | |
2385 | * and/or stop its context. | |
2386 | */ | |
6708bb27 | 2387 | pr_debug("SE_LUN[%d] - ITT: 0x%08x before transport" |
e3d6f909 AG |
2388 | "_lun_wait_for_tasks()\n", cmd->se_lun->unpacked_lun, |
2389 | cmd->se_tfo->get_task_tag(cmd)); | |
c66ac9db | 2390 | |
e3d6f909 | 2391 | if (transport_lun_wait_for_tasks(cmd, cmd->se_lun) < 0) { |
c66ac9db NB |
2392 | spin_lock_irqsave(&lun->lun_cmd_lock, lun_flags); |
2393 | continue; | |
2394 | } | |
2395 | ||
6708bb27 | 2396 | pr_debug("SE_LUN[%d] - ITT: 0x%08x after transport_lun" |
c66ac9db | 2397 | "_wait_for_tasks(): SUCCESS\n", |
e3d6f909 AG |
2398 | cmd->se_lun->unpacked_lun, |
2399 | cmd->se_tfo->get_task_tag(cmd)); | |
c66ac9db | 2400 | |
a1d8b49a | 2401 | spin_lock_irqsave(&cmd->t_state_lock, cmd_flags); |
7d680f3b | 2402 | if (!(cmd->transport_state & CMD_T_DEV_ACTIVE)) { |
a1d8b49a | 2403 | spin_unlock_irqrestore(&cmd->t_state_lock, cmd_flags); |
c66ac9db NB |
2404 | goto check_cond; |
2405 | } | |
7d680f3b | 2406 | cmd->transport_state &= ~CMD_T_DEV_ACTIVE; |
cf572a96 | 2407 | target_remove_from_state_list(cmd); |
a1d8b49a | 2408 | spin_unlock_irqrestore(&cmd->t_state_lock, cmd_flags); |
c66ac9db | 2409 | |
c66ac9db NB |
2410 | /* |
2411 | * The Storage engine stopped this struct se_cmd before it was | |
2412 | * send to the fabric frontend for delivery back to the | |
2413 | * Initiator Node. Return this SCSI CDB back with an | |
2414 | * CHECK_CONDITION status. | |
2415 | */ | |
2416 | check_cond: | |
2417 | transport_send_check_condition_and_sense(cmd, | |
2418 | TCM_NON_EXISTENT_LUN, 0); | |
2419 | /* | |
2420 | * If the fabric frontend is waiting for this iscsi_cmd_t to | |
2421 | * be released, notify the waiting thread now that LU has | |
2422 | * finished accessing it. | |
2423 | */ | |
a1d8b49a | 2424 | spin_lock_irqsave(&cmd->t_state_lock, cmd_flags); |
7d680f3b | 2425 | if (cmd->transport_state & CMD_T_LUN_FE_STOP) { |
6708bb27 | 2426 | pr_debug("SE_LUN[%d] - Detected FE stop for" |
c66ac9db NB |
2427 | " struct se_cmd: %p ITT: 0x%08x\n", |
2428 | lun->unpacked_lun, | |
e3d6f909 | 2429 | cmd, cmd->se_tfo->get_task_tag(cmd)); |
c66ac9db | 2430 | |
a1d8b49a | 2431 | spin_unlock_irqrestore(&cmd->t_state_lock, |
c66ac9db | 2432 | cmd_flags); |
f7113a47 | 2433 | transport_cmd_check_stop(cmd, false); |
a1d8b49a | 2434 | complete(&cmd->transport_lun_fe_stop_comp); |
c66ac9db NB |
2435 | spin_lock_irqsave(&lun->lun_cmd_lock, lun_flags); |
2436 | continue; | |
2437 | } | |
6708bb27 | 2438 | pr_debug("SE_LUN[%d] - ITT: 0x%08x finished processing\n", |
e3d6f909 | 2439 | lun->unpacked_lun, cmd->se_tfo->get_task_tag(cmd)); |
c66ac9db | 2440 | |
a1d8b49a | 2441 | spin_unlock_irqrestore(&cmd->t_state_lock, cmd_flags); |
c66ac9db NB |
2442 | spin_lock_irqsave(&lun->lun_cmd_lock, lun_flags); |
2443 | } | |
2444 | spin_unlock_irqrestore(&lun->lun_cmd_lock, lun_flags); | |
2445 | } | |
2446 | ||
2447 | static int transport_clear_lun_thread(void *p) | |
2448 | { | |
8359cf43 | 2449 | struct se_lun *lun = p; |
c66ac9db NB |
2450 | |
2451 | __transport_clear_lun_from_sessions(lun); | |
2452 | complete(&lun->lun_shutdown_comp); | |
2453 | ||
2454 | return 0; | |
2455 | } | |
2456 | ||
2457 | int transport_clear_lun_from_sessions(struct se_lun *lun) | |
2458 | { | |
2459 | struct task_struct *kt; | |
2460 | ||
5951146d | 2461 | kt = kthread_run(transport_clear_lun_thread, lun, |
c66ac9db NB |
2462 | "tcm_cl_%u", lun->unpacked_lun); |
2463 | if (IS_ERR(kt)) { | |
6708bb27 | 2464 | pr_err("Unable to start clear_lun thread\n"); |
e3d6f909 | 2465 | return PTR_ERR(kt); |
c66ac9db NB |
2466 | } |
2467 | wait_for_completion(&lun->lun_shutdown_comp); | |
2468 | ||
2469 | return 0; | |
2470 | } | |
2471 | ||
d14921d6 NB |
2472 | /** |
2473 | * transport_wait_for_tasks - wait for completion to occur | |
2474 | * @cmd: command to wait | |
c66ac9db | 2475 | * |
d14921d6 NB |
2476 | * Called from frontend fabric context to wait for storage engine |
2477 | * to pause and/or release frontend generated struct se_cmd. | |
c66ac9db | 2478 | */ |
a17f091d | 2479 | bool transport_wait_for_tasks(struct se_cmd *cmd) |
c66ac9db NB |
2480 | { |
2481 | unsigned long flags; | |
2482 | ||
a1d8b49a | 2483 | spin_lock_irqsave(&cmd->t_state_lock, flags); |
c8e31f26 AG |
2484 | if (!(cmd->se_cmd_flags & SCF_SE_LUN_CMD) && |
2485 | !(cmd->se_cmd_flags & SCF_SCSI_TMR_CDB)) { | |
d14921d6 | 2486 | spin_unlock_irqrestore(&cmd->t_state_lock, flags); |
a17f091d | 2487 | return false; |
d14921d6 | 2488 | } |
cb4f4d3c | 2489 | |
c8e31f26 AG |
2490 | if (!(cmd->se_cmd_flags & SCF_SUPPORTED_SAM_OPCODE) && |
2491 | !(cmd->se_cmd_flags & SCF_SCSI_TMR_CDB)) { | |
d14921d6 | 2492 | spin_unlock_irqrestore(&cmd->t_state_lock, flags); |
a17f091d | 2493 | return false; |
d14921d6 | 2494 | } |
c66ac9db NB |
2495 | /* |
2496 | * If we are already stopped due to an external event (ie: LUN shutdown) | |
2497 | * sleep until the connection can have the passed struct se_cmd back. | |
a1d8b49a | 2498 | * The cmd->transport_lun_stopped_sem will be upped by |
c66ac9db NB |
2499 | * transport_clear_lun_from_sessions() once the ConfigFS context caller |
2500 | * has completed its operation on the struct se_cmd. | |
2501 | */ | |
7d680f3b | 2502 | if (cmd->transport_state & CMD_T_LUN_STOP) { |
6708bb27 | 2503 | pr_debug("wait_for_tasks: Stopping" |
e3d6f909 | 2504 | " wait_for_completion(&cmd->t_tasktransport_lun_fe" |
c66ac9db | 2505 | "_stop_comp); for ITT: 0x%08x\n", |
e3d6f909 | 2506 | cmd->se_tfo->get_task_tag(cmd)); |
c66ac9db NB |
2507 | /* |
2508 | * There is a special case for WRITES where a FE exception + | |
2509 | * LUN shutdown means ConfigFS context is still sleeping on | |
2510 | * transport_lun_stop_comp in transport_lun_wait_for_tasks(). | |
2511 | * We go ahead and up transport_lun_stop_comp just to be sure | |
2512 | * here. | |
2513 | */ | |
a1d8b49a AG |
2514 | spin_unlock_irqrestore(&cmd->t_state_lock, flags); |
2515 | complete(&cmd->transport_lun_stop_comp); | |
2516 | wait_for_completion(&cmd->transport_lun_fe_stop_comp); | |
2517 | spin_lock_irqsave(&cmd->t_state_lock, flags); | |
c66ac9db | 2518 | |
cf572a96 | 2519 | target_remove_from_state_list(cmd); |
c66ac9db NB |
2520 | /* |
2521 | * At this point, the frontend who was the originator of this | |
2522 | * struct se_cmd, now owns the structure and can be released through | |
2523 | * normal means below. | |
2524 | */ | |
6708bb27 | 2525 | pr_debug("wait_for_tasks: Stopped" |
e3d6f909 | 2526 | " wait_for_completion(&cmd->t_tasktransport_lun_fe_" |
c66ac9db | 2527 | "stop_comp); for ITT: 0x%08x\n", |
e3d6f909 | 2528 | cmd->se_tfo->get_task_tag(cmd)); |
c66ac9db | 2529 | |
7d680f3b | 2530 | cmd->transport_state &= ~CMD_T_LUN_STOP; |
c66ac9db | 2531 | } |
7d680f3b | 2532 | |
3d28934a | 2533 | if (!(cmd->transport_state & CMD_T_ACTIVE)) { |
d14921d6 | 2534 | spin_unlock_irqrestore(&cmd->t_state_lock, flags); |
a17f091d | 2535 | return false; |
d14921d6 | 2536 | } |
c66ac9db | 2537 | |
7d680f3b | 2538 | cmd->transport_state |= CMD_T_STOP; |
c66ac9db | 2539 | |
6708bb27 | 2540 | pr_debug("wait_for_tasks: Stopping %p ITT: 0x%08x" |
7d680f3b | 2541 | " i_state: %d, t_state: %d, CMD_T_STOP\n", |
f2da9dbd CH |
2542 | cmd, cmd->se_tfo->get_task_tag(cmd), |
2543 | cmd->se_tfo->get_cmd_state(cmd), cmd->t_state); | |
c66ac9db | 2544 | |
a1d8b49a | 2545 | spin_unlock_irqrestore(&cmd->t_state_lock, flags); |
c66ac9db | 2546 | |
a1d8b49a | 2547 | wait_for_completion(&cmd->t_transport_stop_comp); |
c66ac9db | 2548 | |
a1d8b49a | 2549 | spin_lock_irqsave(&cmd->t_state_lock, flags); |
7d680f3b | 2550 | cmd->transport_state &= ~(CMD_T_ACTIVE | CMD_T_STOP); |
c66ac9db | 2551 | |
35d1efe8 | 2552 | pr_debug("wait_for_tasks: Stopped wait_for_completion(" |
a1d8b49a | 2553 | "&cmd->t_transport_stop_comp) for ITT: 0x%08x\n", |
e3d6f909 | 2554 | cmd->se_tfo->get_task_tag(cmd)); |
c66ac9db | 2555 | |
d14921d6 | 2556 | spin_unlock_irqrestore(&cmd->t_state_lock, flags); |
a17f091d NB |
2557 | |
2558 | return true; | |
c66ac9db | 2559 | } |
d14921d6 | 2560 | EXPORT_SYMBOL(transport_wait_for_tasks); |
c66ac9db NB |
2561 | |
2562 | static int transport_get_sense_codes( | |
2563 | struct se_cmd *cmd, | |
2564 | u8 *asc, | |
2565 | u8 *ascq) | |
2566 | { | |
2567 | *asc = cmd->scsi_asc; | |
2568 | *ascq = cmd->scsi_ascq; | |
2569 | ||
2570 | return 0; | |
2571 | } | |
2572 | ||
de103c93 CH |
2573 | int |
2574 | transport_send_check_condition_and_sense(struct se_cmd *cmd, | |
2575 | sense_reason_t reason, int from_transport) | |
c66ac9db NB |
2576 | { |
2577 | unsigned char *buffer = cmd->sense_buffer; | |
2578 | unsigned long flags; | |
c66ac9db NB |
2579 | u8 asc = 0, ascq = 0; |
2580 | ||
a1d8b49a | 2581 | spin_lock_irqsave(&cmd->t_state_lock, flags); |
c66ac9db | 2582 | if (cmd->se_cmd_flags & SCF_SENT_CHECK_CONDITION) { |
a1d8b49a | 2583 | spin_unlock_irqrestore(&cmd->t_state_lock, flags); |
c66ac9db NB |
2584 | return 0; |
2585 | } | |
2586 | cmd->se_cmd_flags |= SCF_SENT_CHECK_CONDITION; | |
a1d8b49a | 2587 | spin_unlock_irqrestore(&cmd->t_state_lock, flags); |
c66ac9db NB |
2588 | |
2589 | if (!reason && from_transport) | |
2590 | goto after_reason; | |
2591 | ||
2592 | if (!from_transport) | |
2593 | cmd->se_cmd_flags |= SCF_EMULATED_TASK_SENSE; | |
9c58b7dd | 2594 | |
c66ac9db NB |
2595 | /* |
2596 | * Actual SENSE DATA, see SPC-3 7.23.2 SPC_SENSE_KEY_OFFSET uses | |
2597 | * SENSE KEY values from include/scsi/scsi.h | |
2598 | */ | |
2599 | switch (reason) { | |
ba829137 HR |
2600 | case TCM_NO_SENSE: |
2601 | /* CURRENT ERROR */ | |
2602 | buffer[0] = 0x70; | |
2603 | buffer[SPC_ADD_SENSE_LEN_OFFSET] = 10; | |
2604 | /* Not Ready */ | |
2605 | buffer[SPC_SENSE_KEY_OFFSET] = NOT_READY; | |
2606 | /* NO ADDITIONAL SENSE INFORMATION */ | |
2607 | buffer[SPC_ASC_KEY_OFFSET] = 0; | |
2608 | buffer[SPC_ASCQ_KEY_OFFSET] = 0; | |
2609 | break; | |
c66ac9db | 2610 | case TCM_NON_EXISTENT_LUN: |
eb39d340 | 2611 | /* CURRENT ERROR */ |
9c58b7dd RD |
2612 | buffer[0] = 0x70; |
2613 | buffer[SPC_ADD_SENSE_LEN_OFFSET] = 10; | |
eb39d340 | 2614 | /* ILLEGAL REQUEST */ |
9c58b7dd | 2615 | buffer[SPC_SENSE_KEY_OFFSET] = ILLEGAL_REQUEST; |
eb39d340 | 2616 | /* LOGICAL UNIT NOT SUPPORTED */ |
9c58b7dd | 2617 | buffer[SPC_ASC_KEY_OFFSET] = 0x25; |
eb39d340 | 2618 | break; |
c66ac9db NB |
2619 | case TCM_UNSUPPORTED_SCSI_OPCODE: |
2620 | case TCM_SECTOR_COUNT_TOO_MANY: | |
2621 | /* CURRENT ERROR */ | |
9c58b7dd RD |
2622 | buffer[0] = 0x70; |
2623 | buffer[SPC_ADD_SENSE_LEN_OFFSET] = 10; | |
c66ac9db | 2624 | /* ILLEGAL REQUEST */ |
9c58b7dd | 2625 | buffer[SPC_SENSE_KEY_OFFSET] = ILLEGAL_REQUEST; |
c66ac9db | 2626 | /* INVALID COMMAND OPERATION CODE */ |
9c58b7dd | 2627 | buffer[SPC_ASC_KEY_OFFSET] = 0x20; |
c66ac9db NB |
2628 | break; |
2629 | case TCM_UNKNOWN_MODE_PAGE: | |
2630 | /* CURRENT ERROR */ | |
9c58b7dd RD |
2631 | buffer[0] = 0x70; |
2632 | buffer[SPC_ADD_SENSE_LEN_OFFSET] = 10; | |
c66ac9db | 2633 | /* ILLEGAL REQUEST */ |
9c58b7dd | 2634 | buffer[SPC_SENSE_KEY_OFFSET] = ILLEGAL_REQUEST; |
c66ac9db | 2635 | /* INVALID FIELD IN CDB */ |
9c58b7dd | 2636 | buffer[SPC_ASC_KEY_OFFSET] = 0x24; |
c66ac9db NB |
2637 | break; |
2638 | case TCM_CHECK_CONDITION_ABORT_CMD: | |
2639 | /* CURRENT ERROR */ | |
9c58b7dd RD |
2640 | buffer[0] = 0x70; |
2641 | buffer[SPC_ADD_SENSE_LEN_OFFSET] = 10; | |
c66ac9db | 2642 | /* ABORTED COMMAND */ |
9c58b7dd | 2643 | buffer[SPC_SENSE_KEY_OFFSET] = ABORTED_COMMAND; |
c66ac9db | 2644 | /* BUS DEVICE RESET FUNCTION OCCURRED */ |
9c58b7dd RD |
2645 | buffer[SPC_ASC_KEY_OFFSET] = 0x29; |
2646 | buffer[SPC_ASCQ_KEY_OFFSET] = 0x03; | |
c66ac9db NB |
2647 | break; |
2648 | case TCM_INCORRECT_AMOUNT_OF_DATA: | |
2649 | /* CURRENT ERROR */ | |
9c58b7dd RD |
2650 | buffer[0] = 0x70; |
2651 | buffer[SPC_ADD_SENSE_LEN_OFFSET] = 10; | |
c66ac9db | 2652 | /* ABORTED COMMAND */ |
9c58b7dd | 2653 | buffer[SPC_SENSE_KEY_OFFSET] = ABORTED_COMMAND; |
c66ac9db | 2654 | /* WRITE ERROR */ |
9c58b7dd | 2655 | buffer[SPC_ASC_KEY_OFFSET] = 0x0c; |
c66ac9db | 2656 | /* NOT ENOUGH UNSOLICITED DATA */ |
9c58b7dd | 2657 | buffer[SPC_ASCQ_KEY_OFFSET] = 0x0d; |
c66ac9db NB |
2658 | break; |
2659 | case TCM_INVALID_CDB_FIELD: | |
2660 | /* CURRENT ERROR */ | |
9c58b7dd RD |
2661 | buffer[0] = 0x70; |
2662 | buffer[SPC_ADD_SENSE_LEN_OFFSET] = 10; | |
9fbc8909 | 2663 | /* ILLEGAL REQUEST */ |
9c58b7dd | 2664 | buffer[SPC_SENSE_KEY_OFFSET] = ILLEGAL_REQUEST; |
c66ac9db | 2665 | /* INVALID FIELD IN CDB */ |
9c58b7dd | 2666 | buffer[SPC_ASC_KEY_OFFSET] = 0x24; |
c66ac9db NB |
2667 | break; |
2668 | case TCM_INVALID_PARAMETER_LIST: | |
2669 | /* CURRENT ERROR */ | |
9c58b7dd RD |
2670 | buffer[0] = 0x70; |
2671 | buffer[SPC_ADD_SENSE_LEN_OFFSET] = 10; | |
9fbc8909 | 2672 | /* ILLEGAL REQUEST */ |
9c58b7dd | 2673 | buffer[SPC_SENSE_KEY_OFFSET] = ILLEGAL_REQUEST; |
c66ac9db | 2674 | /* INVALID FIELD IN PARAMETER LIST */ |
9c58b7dd | 2675 | buffer[SPC_ASC_KEY_OFFSET] = 0x26; |
c66ac9db NB |
2676 | break; |
2677 | case TCM_UNEXPECTED_UNSOLICITED_DATA: | |
2678 | /* CURRENT ERROR */ | |
9c58b7dd RD |
2679 | buffer[0] = 0x70; |
2680 | buffer[SPC_ADD_SENSE_LEN_OFFSET] = 10; | |
c66ac9db | 2681 | /* ABORTED COMMAND */ |
9c58b7dd | 2682 | buffer[SPC_SENSE_KEY_OFFSET] = ABORTED_COMMAND; |
c66ac9db | 2683 | /* WRITE ERROR */ |
9c58b7dd | 2684 | buffer[SPC_ASC_KEY_OFFSET] = 0x0c; |
c66ac9db | 2685 | /* UNEXPECTED_UNSOLICITED_DATA */ |
9c58b7dd | 2686 | buffer[SPC_ASCQ_KEY_OFFSET] = 0x0c; |
c66ac9db NB |
2687 | break; |
2688 | case TCM_SERVICE_CRC_ERROR: | |
2689 | /* CURRENT ERROR */ | |
9c58b7dd RD |
2690 | buffer[0] = 0x70; |
2691 | buffer[SPC_ADD_SENSE_LEN_OFFSET] = 10; | |
c66ac9db | 2692 | /* ABORTED COMMAND */ |
9c58b7dd | 2693 | buffer[SPC_SENSE_KEY_OFFSET] = ABORTED_COMMAND; |
c66ac9db | 2694 | /* PROTOCOL SERVICE CRC ERROR */ |
9c58b7dd | 2695 | buffer[SPC_ASC_KEY_OFFSET] = 0x47; |
c66ac9db | 2696 | /* N/A */ |
9c58b7dd | 2697 | buffer[SPC_ASCQ_KEY_OFFSET] = 0x05; |
c66ac9db NB |
2698 | break; |
2699 | case TCM_SNACK_REJECTED: | |
2700 | /* CURRENT ERROR */ | |
9c58b7dd RD |
2701 | buffer[0] = 0x70; |
2702 | buffer[SPC_ADD_SENSE_LEN_OFFSET] = 10; | |
c66ac9db | 2703 | /* ABORTED COMMAND */ |
9c58b7dd | 2704 | buffer[SPC_SENSE_KEY_OFFSET] = ABORTED_COMMAND; |
c66ac9db | 2705 | /* READ ERROR */ |
9c58b7dd | 2706 | buffer[SPC_ASC_KEY_OFFSET] = 0x11; |
c66ac9db | 2707 | /* FAILED RETRANSMISSION REQUEST */ |
9c58b7dd | 2708 | buffer[SPC_ASCQ_KEY_OFFSET] = 0x13; |
c66ac9db NB |
2709 | break; |
2710 | case TCM_WRITE_PROTECTED: | |
2711 | /* CURRENT ERROR */ | |
9c58b7dd RD |
2712 | buffer[0] = 0x70; |
2713 | buffer[SPC_ADD_SENSE_LEN_OFFSET] = 10; | |
c66ac9db | 2714 | /* DATA PROTECT */ |
9c58b7dd | 2715 | buffer[SPC_SENSE_KEY_OFFSET] = DATA_PROTECT; |
c66ac9db | 2716 | /* WRITE PROTECTED */ |
9c58b7dd | 2717 | buffer[SPC_ASC_KEY_OFFSET] = 0x27; |
c66ac9db | 2718 | break; |
e2397c70 RD |
2719 | case TCM_ADDRESS_OUT_OF_RANGE: |
2720 | /* CURRENT ERROR */ | |
9c58b7dd RD |
2721 | buffer[0] = 0x70; |
2722 | buffer[SPC_ADD_SENSE_LEN_OFFSET] = 10; | |
e2397c70 | 2723 | /* ILLEGAL REQUEST */ |
9c58b7dd | 2724 | buffer[SPC_SENSE_KEY_OFFSET] = ILLEGAL_REQUEST; |
e2397c70 | 2725 | /* LOGICAL BLOCK ADDRESS OUT OF RANGE */ |
9c58b7dd | 2726 | buffer[SPC_ASC_KEY_OFFSET] = 0x21; |
e2397c70 | 2727 | break; |
c66ac9db NB |
2728 | case TCM_CHECK_CONDITION_UNIT_ATTENTION: |
2729 | /* CURRENT ERROR */ | |
9c58b7dd RD |
2730 | buffer[0] = 0x70; |
2731 | buffer[SPC_ADD_SENSE_LEN_OFFSET] = 10; | |
c66ac9db | 2732 | /* UNIT ATTENTION */ |
9c58b7dd | 2733 | buffer[SPC_SENSE_KEY_OFFSET] = UNIT_ATTENTION; |
c66ac9db | 2734 | core_scsi3_ua_for_check_condition(cmd, &asc, &ascq); |
9c58b7dd RD |
2735 | buffer[SPC_ASC_KEY_OFFSET] = asc; |
2736 | buffer[SPC_ASCQ_KEY_OFFSET] = ascq; | |
c66ac9db NB |
2737 | break; |
2738 | case TCM_CHECK_CONDITION_NOT_READY: | |
2739 | /* CURRENT ERROR */ | |
9c58b7dd RD |
2740 | buffer[0] = 0x70; |
2741 | buffer[SPC_ADD_SENSE_LEN_OFFSET] = 10; | |
c66ac9db | 2742 | /* Not Ready */ |
9c58b7dd | 2743 | buffer[SPC_SENSE_KEY_OFFSET] = NOT_READY; |
c66ac9db | 2744 | transport_get_sense_codes(cmd, &asc, &ascq); |
9c58b7dd RD |
2745 | buffer[SPC_ASC_KEY_OFFSET] = asc; |
2746 | buffer[SPC_ASCQ_KEY_OFFSET] = ascq; | |
c66ac9db NB |
2747 | break; |
2748 | case TCM_LOGICAL_UNIT_COMMUNICATION_FAILURE: | |
2749 | default: | |
2750 | /* CURRENT ERROR */ | |
9c58b7dd RD |
2751 | buffer[0] = 0x70; |
2752 | buffer[SPC_ADD_SENSE_LEN_OFFSET] = 10; | |
c66ac9db | 2753 | /* ILLEGAL REQUEST */ |
9c58b7dd | 2754 | buffer[SPC_SENSE_KEY_OFFSET] = ILLEGAL_REQUEST; |
c66ac9db | 2755 | /* LOGICAL UNIT COMMUNICATION FAILURE */ |
18a9df42 | 2756 | buffer[SPC_ASC_KEY_OFFSET] = 0x08; |
c66ac9db NB |
2757 | break; |
2758 | } | |
2759 | /* | |
2760 | * This code uses linux/include/scsi/scsi.h SAM status codes! | |
2761 | */ | |
2762 | cmd->scsi_status = SAM_STAT_CHECK_CONDITION; | |
2763 | /* | |
2764 | * Automatically padded, this value is encoded in the fabric's | |
2765 | * data_length response PDU containing the SCSI defined sense data. | |
2766 | */ | |
9c58b7dd | 2767 | cmd->scsi_sense_length = TRANSPORT_SENSE_BUFFER; |
c66ac9db NB |
2768 | |
2769 | after_reason: | |
07bde79a | 2770 | return cmd->se_tfo->queue_status(cmd); |
c66ac9db NB |
2771 | } |
2772 | EXPORT_SYMBOL(transport_send_check_condition_and_sense); | |
2773 | ||
2774 | int transport_check_aborted_status(struct se_cmd *cmd, int send_status) | |
2775 | { | |
c18bc7d8 RD |
2776 | if (!(cmd->transport_state & CMD_T_ABORTED)) |
2777 | return 0; | |
c66ac9db | 2778 | |
c18bc7d8 RD |
2779 | if (!send_status || (cmd->se_cmd_flags & SCF_SENT_DELAYED_TAS)) |
2780 | return 1; | |
8b1e1244 | 2781 | |
c18bc7d8 RD |
2782 | pr_debug("Sending delayed SAM_STAT_TASK_ABORTED status for CDB: 0x%02x ITT: 0x%08x\n", |
2783 | cmd->t_task_cdb[0], cmd->se_tfo->get_task_tag(cmd)); | |
8b1e1244 | 2784 | |
c18bc7d8 RD |
2785 | cmd->se_cmd_flags |= SCF_SENT_DELAYED_TAS; |
2786 | cmd->se_tfo->queue_status(cmd); | |
2787 | ||
2788 | return 1; | |
c66ac9db NB |
2789 | } |
2790 | EXPORT_SYMBOL(transport_check_aborted_status); | |
2791 | ||
2792 | void transport_send_task_abort(struct se_cmd *cmd) | |
2793 | { | |
c252f003 NB |
2794 | unsigned long flags; |
2795 | ||
2796 | spin_lock_irqsave(&cmd->t_state_lock, flags); | |
3ea160b3 | 2797 | if (cmd->se_cmd_flags & (SCF_SENT_CHECK_CONDITION | SCF_SENT_DELAYED_TAS)) { |
c252f003 NB |
2798 | spin_unlock_irqrestore(&cmd->t_state_lock, flags); |
2799 | return; | |
2800 | } | |
2801 | spin_unlock_irqrestore(&cmd->t_state_lock, flags); | |
2802 | ||
c66ac9db NB |
2803 | /* |
2804 | * If there are still expected incoming fabric WRITEs, we wait | |
2805 | * until until they have completed before sending a TASK_ABORTED | |
2806 | * response. This response with TASK_ABORTED status will be | |
2807 | * queued back to fabric module by transport_check_aborted_status(). | |
2808 | */ | |
2809 | if (cmd->data_direction == DMA_TO_DEVICE) { | |
e3d6f909 | 2810 | if (cmd->se_tfo->write_pending_status(cmd) != 0) { |
7d680f3b | 2811 | cmd->transport_state |= CMD_T_ABORTED; |
c66ac9db | 2812 | smp_mb__after_atomic_inc(); |
c66ac9db NB |
2813 | } |
2814 | } | |
2815 | cmd->scsi_status = SAM_STAT_TASK_ABORTED; | |
8b1e1244 | 2816 | |
72b59d6e RD |
2817 | transport_lun_remove_cmd(cmd); |
2818 | ||
6708bb27 | 2819 | pr_debug("Setting SAM_STAT_TASK_ABORTED status for CDB: 0x%02x," |
a1d8b49a | 2820 | " ITT: 0x%08x\n", cmd->t_task_cdb[0], |
e3d6f909 | 2821 | cmd->se_tfo->get_task_tag(cmd)); |
8b1e1244 | 2822 | |
e3d6f909 | 2823 | cmd->se_tfo->queue_status(cmd); |
c66ac9db NB |
2824 | } |
2825 | ||
af877292 | 2826 | static void target_tmr_work(struct work_struct *work) |
c66ac9db | 2827 | { |
af877292 | 2828 | struct se_cmd *cmd = container_of(work, struct se_cmd, work); |
5951146d | 2829 | struct se_device *dev = cmd->se_dev; |
c66ac9db NB |
2830 | struct se_tmr_req *tmr = cmd->se_tmr_req; |
2831 | int ret; | |
2832 | ||
2833 | switch (tmr->function) { | |
5c6cd613 | 2834 | case TMR_ABORT_TASK: |
3d28934a | 2835 | core_tmr_abort_task(dev, tmr, cmd->se_sess); |
c66ac9db | 2836 | break; |
5c6cd613 NB |
2837 | case TMR_ABORT_TASK_SET: |
2838 | case TMR_CLEAR_ACA: | |
2839 | case TMR_CLEAR_TASK_SET: | |
c66ac9db NB |
2840 | tmr->response = TMR_TASK_MGMT_FUNCTION_NOT_SUPPORTED; |
2841 | break; | |
5c6cd613 | 2842 | case TMR_LUN_RESET: |
c66ac9db NB |
2843 | ret = core_tmr_lun_reset(dev, tmr, NULL, NULL); |
2844 | tmr->response = (!ret) ? TMR_FUNCTION_COMPLETE : | |
2845 | TMR_FUNCTION_REJECTED; | |
2846 | break; | |
5c6cd613 | 2847 | case TMR_TARGET_WARM_RESET: |
c66ac9db NB |
2848 | tmr->response = TMR_FUNCTION_REJECTED; |
2849 | break; | |
5c6cd613 | 2850 | case TMR_TARGET_COLD_RESET: |
c66ac9db NB |
2851 | tmr->response = TMR_FUNCTION_REJECTED; |
2852 | break; | |
c66ac9db | 2853 | default: |
6708bb27 | 2854 | pr_err("Uknown TMR function: 0x%02x.\n", |
c66ac9db NB |
2855 | tmr->function); |
2856 | tmr->response = TMR_FUNCTION_REJECTED; | |
2857 | break; | |
2858 | } | |
2859 | ||
2860 | cmd->t_state = TRANSPORT_ISTATE_PROCESSING; | |
e3d6f909 | 2861 | cmd->se_tfo->queue_tm_rsp(cmd); |
c66ac9db | 2862 | |
b7b8bef7 | 2863 | transport_cmd_check_stop_to_fabric(cmd); |
c66ac9db NB |
2864 | } |
2865 | ||
af877292 CH |
2866 | int transport_generic_handle_tmr( |
2867 | struct se_cmd *cmd) | |
c66ac9db | 2868 | { |
af877292 CH |
2869 | INIT_WORK(&cmd->work, target_tmr_work); |
2870 | queue_work(cmd->se_dev->tmr_wq, &cmd->work); | |
c66ac9db NB |
2871 | return 0; |
2872 | } | |
af877292 | 2873 | EXPORT_SYMBOL(transport_generic_handle_tmr); |