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c66ac9db NB |
1 | /******************************************************************************* |
2 | * Filename: target_core_transport.c | |
3 | * | |
4 | * This file contains the Generic Target Engine Core. | |
5 | * | |
6 | * Copyright (c) 2002, 2003, 2004, 2005 PyX Technologies, Inc. | |
7 | * Copyright (c) 2005, 2006, 2007 SBE, Inc. | |
8 | * Copyright (c) 2007-2010 Rising Tide Systems | |
9 | * Copyright (c) 2008-2010 Linux-iSCSI.org | |
10 | * | |
11 | * Nicholas A. Bellinger <nab@kernel.org> | |
12 | * | |
13 | * This program is free software; you can redistribute it and/or modify | |
14 | * it under the terms of the GNU General Public License as published by | |
15 | * the Free Software Foundation; either version 2 of the License, or | |
16 | * (at your option) any later version. | |
17 | * | |
18 | * This program is distributed in the hope that it will be useful, | |
19 | * but WITHOUT ANY WARRANTY; without even the implied warranty of | |
20 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
21 | * GNU General Public License for more details. | |
22 | * | |
23 | * You should have received a copy of the GNU General Public License | |
24 | * along with this program; if not, write to the Free Software | |
25 | * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. | |
26 | * | |
27 | ******************************************************************************/ | |
28 | ||
c66ac9db NB |
29 | #include <linux/net.h> |
30 | #include <linux/delay.h> | |
31 | #include <linux/string.h> | |
32 | #include <linux/timer.h> | |
33 | #include <linux/slab.h> | |
34 | #include <linux/blkdev.h> | |
35 | #include <linux/spinlock.h> | |
c66ac9db NB |
36 | #include <linux/kthread.h> |
37 | #include <linux/in.h> | |
38 | #include <linux/cdrom.h> | |
827509e3 | 39 | #include <linux/module.h> |
015487b8 | 40 | #include <linux/ratelimit.h> |
c66ac9db NB |
41 | #include <asm/unaligned.h> |
42 | #include <net/sock.h> | |
43 | #include <net/tcp.h> | |
44 | #include <scsi/scsi.h> | |
45 | #include <scsi/scsi_cmnd.h> | |
e66ecd50 | 46 | #include <scsi/scsi_tcq.h> |
c66ac9db NB |
47 | |
48 | #include <target/target_core_base.h> | |
c4795fb2 CH |
49 | #include <target/target_core_backend.h> |
50 | #include <target/target_core_fabric.h> | |
c66ac9db NB |
51 | #include <target/target_core_configfs.h> |
52 | ||
e26d99ae | 53 | #include "target_core_internal.h" |
c66ac9db | 54 | #include "target_core_alua.h" |
c66ac9db | 55 | #include "target_core_pr.h" |
c66ac9db NB |
56 | #include "target_core_ua.h" |
57 | ||
e3d6f909 | 58 | static int sub_api_initialized; |
c66ac9db | 59 | |
35e0e757 | 60 | static struct workqueue_struct *target_completion_wq; |
c66ac9db | 61 | static struct kmem_cache *se_sess_cache; |
c66ac9db | 62 | struct kmem_cache *se_ua_cache; |
c66ac9db NB |
63 | struct kmem_cache *t10_pr_reg_cache; |
64 | struct kmem_cache *t10_alua_lu_gp_cache; | |
65 | struct kmem_cache *t10_alua_lu_gp_mem_cache; | |
66 | struct kmem_cache *t10_alua_tg_pt_gp_cache; | |
67 | struct kmem_cache *t10_alua_tg_pt_gp_mem_cache; | |
68 | ||
c66ac9db | 69 | static int transport_generic_write_pending(struct se_cmd *); |
5951146d | 70 | static int transport_processing_thread(void *param); |
4d2300cc | 71 | static int __transport_execute_tasks(struct se_device *dev, struct se_cmd *); |
c66ac9db | 72 | static void transport_complete_task_attr(struct se_cmd *cmd); |
07bde79a | 73 | static void transport_handle_queue_full(struct se_cmd *cmd, |
e057f533 | 74 | struct se_device *dev); |
05d1c7c0 | 75 | static int transport_generic_get_mem(struct se_cmd *cmd); |
39c05f32 | 76 | static void transport_put_cmd(struct se_cmd *cmd); |
3df8d40b | 77 | static void transport_remove_cmd_from_queue(struct se_cmd *cmd); |
c66ac9db | 78 | static int transport_set_sense_codes(struct se_cmd *cmd, u8 asc, u8 ascq); |
35e0e757 | 79 | static void target_complete_ok_work(struct work_struct *work); |
c66ac9db | 80 | |
e3d6f909 | 81 | int init_se_kmem_caches(void) |
c66ac9db | 82 | { |
c66ac9db NB |
83 | se_sess_cache = kmem_cache_create("se_sess_cache", |
84 | sizeof(struct se_session), __alignof__(struct se_session), | |
85 | 0, NULL); | |
6708bb27 AG |
86 | if (!se_sess_cache) { |
87 | pr_err("kmem_cache_create() for struct se_session" | |
c66ac9db | 88 | " failed\n"); |
c8e31f26 | 89 | goto out; |
c66ac9db NB |
90 | } |
91 | se_ua_cache = kmem_cache_create("se_ua_cache", | |
92 | sizeof(struct se_ua), __alignof__(struct se_ua), | |
93 | 0, NULL); | |
6708bb27 AG |
94 | if (!se_ua_cache) { |
95 | pr_err("kmem_cache_create() for struct se_ua failed\n"); | |
35e0e757 | 96 | goto out_free_sess_cache; |
c66ac9db | 97 | } |
c66ac9db NB |
98 | t10_pr_reg_cache = kmem_cache_create("t10_pr_reg_cache", |
99 | sizeof(struct t10_pr_registration), | |
100 | __alignof__(struct t10_pr_registration), 0, NULL); | |
6708bb27 AG |
101 | if (!t10_pr_reg_cache) { |
102 | pr_err("kmem_cache_create() for struct t10_pr_registration" | |
c66ac9db | 103 | " failed\n"); |
35e0e757 | 104 | goto out_free_ua_cache; |
c66ac9db NB |
105 | } |
106 | t10_alua_lu_gp_cache = kmem_cache_create("t10_alua_lu_gp_cache", | |
107 | sizeof(struct t10_alua_lu_gp), __alignof__(struct t10_alua_lu_gp), | |
108 | 0, NULL); | |
6708bb27 AG |
109 | if (!t10_alua_lu_gp_cache) { |
110 | pr_err("kmem_cache_create() for t10_alua_lu_gp_cache" | |
c66ac9db | 111 | " failed\n"); |
35e0e757 | 112 | goto out_free_pr_reg_cache; |
c66ac9db NB |
113 | } |
114 | t10_alua_lu_gp_mem_cache = kmem_cache_create("t10_alua_lu_gp_mem_cache", | |
115 | sizeof(struct t10_alua_lu_gp_member), | |
116 | __alignof__(struct t10_alua_lu_gp_member), 0, NULL); | |
6708bb27 AG |
117 | if (!t10_alua_lu_gp_mem_cache) { |
118 | pr_err("kmem_cache_create() for t10_alua_lu_gp_mem_" | |
c66ac9db | 119 | "cache failed\n"); |
35e0e757 | 120 | goto out_free_lu_gp_cache; |
c66ac9db NB |
121 | } |
122 | t10_alua_tg_pt_gp_cache = kmem_cache_create("t10_alua_tg_pt_gp_cache", | |
123 | sizeof(struct t10_alua_tg_pt_gp), | |
124 | __alignof__(struct t10_alua_tg_pt_gp), 0, NULL); | |
6708bb27 AG |
125 | if (!t10_alua_tg_pt_gp_cache) { |
126 | pr_err("kmem_cache_create() for t10_alua_tg_pt_gp_" | |
c66ac9db | 127 | "cache failed\n"); |
35e0e757 | 128 | goto out_free_lu_gp_mem_cache; |
c66ac9db NB |
129 | } |
130 | t10_alua_tg_pt_gp_mem_cache = kmem_cache_create( | |
131 | "t10_alua_tg_pt_gp_mem_cache", | |
132 | sizeof(struct t10_alua_tg_pt_gp_member), | |
133 | __alignof__(struct t10_alua_tg_pt_gp_member), | |
134 | 0, NULL); | |
6708bb27 AG |
135 | if (!t10_alua_tg_pt_gp_mem_cache) { |
136 | pr_err("kmem_cache_create() for t10_alua_tg_pt_gp_" | |
c66ac9db | 137 | "mem_t failed\n"); |
35e0e757 | 138 | goto out_free_tg_pt_gp_cache; |
c66ac9db NB |
139 | } |
140 | ||
35e0e757 CH |
141 | target_completion_wq = alloc_workqueue("target_completion", |
142 | WQ_MEM_RECLAIM, 0); | |
143 | if (!target_completion_wq) | |
144 | goto out_free_tg_pt_gp_mem_cache; | |
145 | ||
c66ac9db | 146 | return 0; |
35e0e757 CH |
147 | |
148 | out_free_tg_pt_gp_mem_cache: | |
149 | kmem_cache_destroy(t10_alua_tg_pt_gp_mem_cache); | |
150 | out_free_tg_pt_gp_cache: | |
151 | kmem_cache_destroy(t10_alua_tg_pt_gp_cache); | |
152 | out_free_lu_gp_mem_cache: | |
153 | kmem_cache_destroy(t10_alua_lu_gp_mem_cache); | |
154 | out_free_lu_gp_cache: | |
155 | kmem_cache_destroy(t10_alua_lu_gp_cache); | |
156 | out_free_pr_reg_cache: | |
157 | kmem_cache_destroy(t10_pr_reg_cache); | |
158 | out_free_ua_cache: | |
159 | kmem_cache_destroy(se_ua_cache); | |
160 | out_free_sess_cache: | |
161 | kmem_cache_destroy(se_sess_cache); | |
c66ac9db | 162 | out: |
e3d6f909 | 163 | return -ENOMEM; |
c66ac9db NB |
164 | } |
165 | ||
e3d6f909 | 166 | void release_se_kmem_caches(void) |
c66ac9db | 167 | { |
35e0e757 | 168 | destroy_workqueue(target_completion_wq); |
c66ac9db NB |
169 | kmem_cache_destroy(se_sess_cache); |
170 | kmem_cache_destroy(se_ua_cache); | |
c66ac9db NB |
171 | kmem_cache_destroy(t10_pr_reg_cache); |
172 | kmem_cache_destroy(t10_alua_lu_gp_cache); | |
173 | kmem_cache_destroy(t10_alua_lu_gp_mem_cache); | |
174 | kmem_cache_destroy(t10_alua_tg_pt_gp_cache); | |
175 | kmem_cache_destroy(t10_alua_tg_pt_gp_mem_cache); | |
c66ac9db NB |
176 | } |
177 | ||
e3d6f909 AG |
178 | /* This code ensures unique mib indexes are handed out. */ |
179 | static DEFINE_SPINLOCK(scsi_mib_index_lock); | |
180 | static u32 scsi_mib_index[SCSI_INDEX_TYPE_MAX]; | |
e89d15ee NB |
181 | |
182 | /* | |
183 | * Allocate a new row index for the entry type specified | |
184 | */ | |
185 | u32 scsi_get_new_index(scsi_index_t type) | |
186 | { | |
187 | u32 new_index; | |
188 | ||
e3d6f909 | 189 | BUG_ON((type < 0) || (type >= SCSI_INDEX_TYPE_MAX)); |
e89d15ee | 190 | |
e3d6f909 AG |
191 | spin_lock(&scsi_mib_index_lock); |
192 | new_index = ++scsi_mib_index[type]; | |
193 | spin_unlock(&scsi_mib_index_lock); | |
e89d15ee NB |
194 | |
195 | return new_index; | |
196 | } | |
197 | ||
e26d99ae | 198 | static void transport_init_queue_obj(struct se_queue_obj *qobj) |
c66ac9db NB |
199 | { |
200 | atomic_set(&qobj->queue_cnt, 0); | |
201 | INIT_LIST_HEAD(&qobj->qobj_list); | |
202 | init_waitqueue_head(&qobj->thread_wq); | |
203 | spin_lock_init(&qobj->cmd_queue_lock); | |
204 | } | |
c66ac9db | 205 | |
dbc5623e | 206 | void transport_subsystem_check_init(void) |
c66ac9db NB |
207 | { |
208 | int ret; | |
209 | ||
dbc5623e NB |
210 | if (sub_api_initialized) |
211 | return; | |
212 | ||
c66ac9db NB |
213 | ret = request_module("target_core_iblock"); |
214 | if (ret != 0) | |
6708bb27 | 215 | pr_err("Unable to load target_core_iblock\n"); |
c66ac9db NB |
216 | |
217 | ret = request_module("target_core_file"); | |
218 | if (ret != 0) | |
6708bb27 | 219 | pr_err("Unable to load target_core_file\n"); |
c66ac9db NB |
220 | |
221 | ret = request_module("target_core_pscsi"); | |
222 | if (ret != 0) | |
6708bb27 | 223 | pr_err("Unable to load target_core_pscsi\n"); |
c66ac9db NB |
224 | |
225 | ret = request_module("target_core_stgt"); | |
226 | if (ret != 0) | |
6708bb27 | 227 | pr_err("Unable to load target_core_stgt\n"); |
c66ac9db | 228 | |
e3d6f909 | 229 | sub_api_initialized = 1; |
dbc5623e | 230 | return; |
c66ac9db NB |
231 | } |
232 | ||
233 | struct se_session *transport_init_session(void) | |
234 | { | |
235 | struct se_session *se_sess; | |
236 | ||
237 | se_sess = kmem_cache_zalloc(se_sess_cache, GFP_KERNEL); | |
6708bb27 AG |
238 | if (!se_sess) { |
239 | pr_err("Unable to allocate struct se_session from" | |
c66ac9db NB |
240 | " se_sess_cache\n"); |
241 | return ERR_PTR(-ENOMEM); | |
242 | } | |
243 | INIT_LIST_HEAD(&se_sess->sess_list); | |
244 | INIT_LIST_HEAD(&se_sess->sess_acl_list); | |
a17f091d NB |
245 | INIT_LIST_HEAD(&se_sess->sess_cmd_list); |
246 | INIT_LIST_HEAD(&se_sess->sess_wait_list); | |
247 | spin_lock_init(&se_sess->sess_cmd_lock); | |
41ac82b6 | 248 | kref_init(&se_sess->sess_kref); |
c66ac9db NB |
249 | |
250 | return se_sess; | |
251 | } | |
252 | EXPORT_SYMBOL(transport_init_session); | |
253 | ||
254 | /* | |
140854cb | 255 | * Called with spin_lock_irqsave(&struct se_portal_group->session_lock called. |
c66ac9db NB |
256 | */ |
257 | void __transport_register_session( | |
258 | struct se_portal_group *se_tpg, | |
259 | struct se_node_acl *se_nacl, | |
260 | struct se_session *se_sess, | |
261 | void *fabric_sess_ptr) | |
262 | { | |
263 | unsigned char buf[PR_REG_ISID_LEN]; | |
264 | ||
265 | se_sess->se_tpg = se_tpg; | |
266 | se_sess->fabric_sess_ptr = fabric_sess_ptr; | |
267 | /* | |
268 | * Used by struct se_node_acl's under ConfigFS to locate active se_session-t | |
269 | * | |
270 | * Only set for struct se_session's that will actually be moving I/O. | |
271 | * eg: *NOT* discovery sessions. | |
272 | */ | |
273 | if (se_nacl) { | |
274 | /* | |
275 | * If the fabric module supports an ISID based TransportID, | |
276 | * save this value in binary from the fabric I_T Nexus now. | |
277 | */ | |
e3d6f909 | 278 | if (se_tpg->se_tpg_tfo->sess_get_initiator_sid != NULL) { |
c66ac9db | 279 | memset(&buf[0], 0, PR_REG_ISID_LEN); |
e3d6f909 | 280 | se_tpg->se_tpg_tfo->sess_get_initiator_sid(se_sess, |
c66ac9db NB |
281 | &buf[0], PR_REG_ISID_LEN); |
282 | se_sess->sess_bin_isid = get_unaligned_be64(&buf[0]); | |
283 | } | |
afb999ff NB |
284 | kref_get(&se_nacl->acl_kref); |
285 | ||
c66ac9db NB |
286 | spin_lock_irq(&se_nacl->nacl_sess_lock); |
287 | /* | |
288 | * The se_nacl->nacl_sess pointer will be set to the | |
289 | * last active I_T Nexus for each struct se_node_acl. | |
290 | */ | |
291 | se_nacl->nacl_sess = se_sess; | |
292 | ||
293 | list_add_tail(&se_sess->sess_acl_list, | |
294 | &se_nacl->acl_sess_list); | |
295 | spin_unlock_irq(&se_nacl->nacl_sess_lock); | |
296 | } | |
297 | list_add_tail(&se_sess->sess_list, &se_tpg->tpg_sess_list); | |
298 | ||
6708bb27 | 299 | pr_debug("TARGET_CORE[%s]: Registered fabric_sess_ptr: %p\n", |
e3d6f909 | 300 | se_tpg->se_tpg_tfo->get_fabric_name(), se_sess->fabric_sess_ptr); |
c66ac9db NB |
301 | } |
302 | EXPORT_SYMBOL(__transport_register_session); | |
303 | ||
304 | void transport_register_session( | |
305 | struct se_portal_group *se_tpg, | |
306 | struct se_node_acl *se_nacl, | |
307 | struct se_session *se_sess, | |
308 | void *fabric_sess_ptr) | |
309 | { | |
140854cb NB |
310 | unsigned long flags; |
311 | ||
312 | spin_lock_irqsave(&se_tpg->session_lock, flags); | |
c66ac9db | 313 | __transport_register_session(se_tpg, se_nacl, se_sess, fabric_sess_ptr); |
140854cb | 314 | spin_unlock_irqrestore(&se_tpg->session_lock, flags); |
c66ac9db NB |
315 | } |
316 | EXPORT_SYMBOL(transport_register_session); | |
317 | ||
4149268e | 318 | void target_release_session(struct kref *kref) |
41ac82b6 NB |
319 | { |
320 | struct se_session *se_sess = container_of(kref, | |
321 | struct se_session, sess_kref); | |
322 | struct se_portal_group *se_tpg = se_sess->se_tpg; | |
323 | ||
324 | se_tpg->se_tpg_tfo->close_session(se_sess); | |
325 | } | |
326 | ||
327 | void target_get_session(struct se_session *se_sess) | |
328 | { | |
329 | kref_get(&se_sess->sess_kref); | |
330 | } | |
331 | EXPORT_SYMBOL(target_get_session); | |
332 | ||
33933a0e | 333 | void target_put_session(struct se_session *se_sess) |
41ac82b6 | 334 | { |
4149268e JE |
335 | struct se_portal_group *tpg = se_sess->se_tpg; |
336 | ||
337 | if (tpg->se_tpg_tfo->put_session != NULL) { | |
338 | tpg->se_tpg_tfo->put_session(se_sess); | |
339 | return; | |
340 | } | |
33933a0e | 341 | kref_put(&se_sess->sess_kref, target_release_session); |
41ac82b6 NB |
342 | } |
343 | EXPORT_SYMBOL(target_put_session); | |
344 | ||
afb999ff NB |
345 | static void target_complete_nacl(struct kref *kref) |
346 | { | |
347 | struct se_node_acl *nacl = container_of(kref, | |
348 | struct se_node_acl, acl_kref); | |
349 | ||
350 | complete(&nacl->acl_free_comp); | |
351 | } | |
352 | ||
353 | void target_put_nacl(struct se_node_acl *nacl) | |
354 | { | |
355 | kref_put(&nacl->acl_kref, target_complete_nacl); | |
356 | } | |
357 | ||
c66ac9db NB |
358 | void transport_deregister_session_configfs(struct se_session *se_sess) |
359 | { | |
360 | struct se_node_acl *se_nacl; | |
23388864 | 361 | unsigned long flags; |
c66ac9db NB |
362 | /* |
363 | * Used by struct se_node_acl's under ConfigFS to locate active struct se_session | |
364 | */ | |
365 | se_nacl = se_sess->se_node_acl; | |
6708bb27 | 366 | if (se_nacl) { |
23388864 | 367 | spin_lock_irqsave(&se_nacl->nacl_sess_lock, flags); |
337c0607 NB |
368 | if (se_nacl->acl_stop == 0) |
369 | list_del(&se_sess->sess_acl_list); | |
c66ac9db NB |
370 | /* |
371 | * If the session list is empty, then clear the pointer. | |
372 | * Otherwise, set the struct se_session pointer from the tail | |
373 | * element of the per struct se_node_acl active session list. | |
374 | */ | |
375 | if (list_empty(&se_nacl->acl_sess_list)) | |
376 | se_nacl->nacl_sess = NULL; | |
377 | else { | |
378 | se_nacl->nacl_sess = container_of( | |
379 | se_nacl->acl_sess_list.prev, | |
380 | struct se_session, sess_acl_list); | |
381 | } | |
23388864 | 382 | spin_unlock_irqrestore(&se_nacl->nacl_sess_lock, flags); |
c66ac9db NB |
383 | } |
384 | } | |
385 | EXPORT_SYMBOL(transport_deregister_session_configfs); | |
386 | ||
387 | void transport_free_session(struct se_session *se_sess) | |
388 | { | |
389 | kmem_cache_free(se_sess_cache, se_sess); | |
390 | } | |
391 | EXPORT_SYMBOL(transport_free_session); | |
392 | ||
393 | void transport_deregister_session(struct se_session *se_sess) | |
394 | { | |
395 | struct se_portal_group *se_tpg = se_sess->se_tpg; | |
01468346 | 396 | struct target_core_fabric_ops *se_tfo; |
c66ac9db | 397 | struct se_node_acl *se_nacl; |
e63a8e19 | 398 | unsigned long flags; |
01468346 | 399 | bool comp_nacl = true; |
c66ac9db | 400 | |
6708bb27 | 401 | if (!se_tpg) { |
c66ac9db NB |
402 | transport_free_session(se_sess); |
403 | return; | |
404 | } | |
01468346 | 405 | se_tfo = se_tpg->se_tpg_tfo; |
c66ac9db | 406 | |
e63a8e19 | 407 | spin_lock_irqsave(&se_tpg->session_lock, flags); |
c66ac9db NB |
408 | list_del(&se_sess->sess_list); |
409 | se_sess->se_tpg = NULL; | |
410 | se_sess->fabric_sess_ptr = NULL; | |
e63a8e19 | 411 | spin_unlock_irqrestore(&se_tpg->session_lock, flags); |
c66ac9db NB |
412 | |
413 | /* | |
414 | * Determine if we need to do extra work for this initiator node's | |
415 | * struct se_node_acl if it had been previously dynamically generated. | |
416 | */ | |
417 | se_nacl = se_sess->se_node_acl; | |
01468346 NB |
418 | |
419 | spin_lock_irqsave(&se_tpg->acl_node_lock, flags); | |
420 | if (se_nacl && se_nacl->dynamic_node_acl) { | |
421 | if (!se_tfo->tpg_check_demo_mode_cache(se_tpg)) { | |
422 | list_del(&se_nacl->acl_list); | |
423 | se_tpg->num_node_acls--; | |
424 | spin_unlock_irqrestore(&se_tpg->acl_node_lock, flags); | |
425 | core_tpg_wait_for_nacl_pr_ref(se_nacl); | |
426 | core_free_device_list_for_node(se_nacl, se_tpg); | |
427 | se_tfo->tpg_release_fabric_acl(se_tpg, se_nacl); | |
428 | ||
429 | comp_nacl = false; | |
430 | spin_lock_irqsave(&se_tpg->acl_node_lock, flags); | |
c66ac9db | 431 | } |
c66ac9db | 432 | } |
01468346 | 433 | spin_unlock_irqrestore(&se_tpg->acl_node_lock, flags); |
c66ac9db | 434 | |
6708bb27 | 435 | pr_debug("TARGET_CORE[%s]: Deregistered fabric_sess\n", |
e3d6f909 | 436 | se_tpg->se_tpg_tfo->get_fabric_name()); |
01468346 | 437 | /* |
afb999ff NB |
438 | * If last kref is dropping now for an explict NodeACL, awake sleeping |
439 | * ->acl_free_comp caller to wakeup configfs se_node_acl->acl_group | |
440 | * removal context. | |
01468346 NB |
441 | */ |
442 | if (se_nacl && comp_nacl == true) | |
afb999ff | 443 | target_put_nacl(se_nacl); |
01468346 | 444 | |
afb999ff | 445 | transport_free_session(se_sess); |
c66ac9db NB |
446 | } |
447 | EXPORT_SYMBOL(transport_deregister_session); | |
448 | ||
449 | /* | |
a1d8b49a | 450 | * Called with cmd->t_state_lock held. |
c66ac9db | 451 | */ |
cf572a96 | 452 | static void target_remove_from_state_list(struct se_cmd *cmd) |
c66ac9db | 453 | { |
42bf829e | 454 | struct se_device *dev = cmd->se_dev; |
c66ac9db NB |
455 | unsigned long flags; |
456 | ||
42bf829e CH |
457 | if (!dev) |
458 | return; | |
c66ac9db | 459 | |
cf572a96 CH |
460 | if (cmd->transport_state & CMD_T_BUSY) |
461 | return; | |
c66ac9db | 462 | |
cf572a96 CH |
463 | spin_lock_irqsave(&dev->execute_task_lock, flags); |
464 | if (cmd->state_active) { | |
465 | list_del(&cmd->state_list); | |
cf572a96 | 466 | cmd->state_active = false; |
c66ac9db | 467 | } |
cf572a96 | 468 | spin_unlock_irqrestore(&dev->execute_task_lock, flags); |
c66ac9db NB |
469 | } |
470 | ||
471 | /* transport_cmd_check_stop(): | |
472 | * | |
7d680f3b | 473 | * 'transport_off = 1' determines if CMD_T_ACTIVE should be cleared. |
c66ac9db NB |
474 | * 'transport_off = 2' determines if task_dev_state should be removed. |
475 | * | |
476 | * A non-zero u8 t_state sets cmd->t_state. | |
477 | * Returns 1 when command is stopped, else 0. | |
478 | */ | |
479 | static int transport_cmd_check_stop( | |
480 | struct se_cmd *cmd, | |
481 | int transport_off, | |
482 | u8 t_state) | |
483 | { | |
484 | unsigned long flags; | |
485 | ||
a1d8b49a | 486 | spin_lock_irqsave(&cmd->t_state_lock, flags); |
c66ac9db NB |
487 | /* |
488 | * Determine if IOCTL context caller in requesting the stopping of this | |
489 | * command for LUN shutdown purposes. | |
490 | */ | |
7d680f3b CH |
491 | if (cmd->transport_state & CMD_T_LUN_STOP) { |
492 | pr_debug("%s:%d CMD_T_LUN_STOP for ITT: 0x%08x\n", | |
493 | __func__, __LINE__, cmd->se_tfo->get_task_tag(cmd)); | |
c66ac9db | 494 | |
7d680f3b | 495 | cmd->transport_state &= ~CMD_T_ACTIVE; |
c66ac9db | 496 | if (transport_off == 2) |
cf572a96 | 497 | target_remove_from_state_list(cmd); |
a1d8b49a | 498 | spin_unlock_irqrestore(&cmd->t_state_lock, flags); |
c66ac9db | 499 | |
a1d8b49a | 500 | complete(&cmd->transport_lun_stop_comp); |
c66ac9db NB |
501 | return 1; |
502 | } | |
503 | /* | |
504 | * Determine if frontend context caller is requesting the stopping of | |
e3d6f909 | 505 | * this command for frontend exceptions. |
c66ac9db | 506 | */ |
7d680f3b CH |
507 | if (cmd->transport_state & CMD_T_STOP) { |
508 | pr_debug("%s:%d CMD_T_STOP for ITT: 0x%08x\n", | |
509 | __func__, __LINE__, | |
e3d6f909 | 510 | cmd->se_tfo->get_task_tag(cmd)); |
c66ac9db | 511 | |
c66ac9db | 512 | if (transport_off == 2) |
cf572a96 | 513 | target_remove_from_state_list(cmd); |
c66ac9db NB |
514 | |
515 | /* | |
516 | * Clear struct se_cmd->se_lun before the transport_off == 2 handoff | |
517 | * to FE. | |
518 | */ | |
519 | if (transport_off == 2) | |
520 | cmd->se_lun = NULL; | |
a1d8b49a | 521 | spin_unlock_irqrestore(&cmd->t_state_lock, flags); |
c66ac9db | 522 | |
a1d8b49a | 523 | complete(&cmd->t_transport_stop_comp); |
c66ac9db NB |
524 | return 1; |
525 | } | |
526 | if (transport_off) { | |
7d680f3b | 527 | cmd->transport_state &= ~CMD_T_ACTIVE; |
c66ac9db | 528 | if (transport_off == 2) { |
cf572a96 | 529 | target_remove_from_state_list(cmd); |
c66ac9db NB |
530 | /* |
531 | * Clear struct se_cmd->se_lun before the transport_off == 2 | |
532 | * handoff to fabric module. | |
533 | */ | |
534 | cmd->se_lun = NULL; | |
535 | /* | |
536 | * Some fabric modules like tcm_loop can release | |
25985edc | 537 | * their internally allocated I/O reference now and |
c66ac9db | 538 | * struct se_cmd now. |
88dd9e26 NB |
539 | * |
540 | * Fabric modules are expected to return '1' here if the | |
541 | * se_cmd being passed is released at this point, | |
542 | * or zero if not being released. | |
c66ac9db | 543 | */ |
e3d6f909 | 544 | if (cmd->se_tfo->check_stop_free != NULL) { |
c66ac9db | 545 | spin_unlock_irqrestore( |
a1d8b49a | 546 | &cmd->t_state_lock, flags); |
c66ac9db | 547 | |
88dd9e26 | 548 | return cmd->se_tfo->check_stop_free(cmd); |
c66ac9db NB |
549 | } |
550 | } | |
a1d8b49a | 551 | spin_unlock_irqrestore(&cmd->t_state_lock, flags); |
c66ac9db NB |
552 | |
553 | return 0; | |
554 | } else if (t_state) | |
555 | cmd->t_state = t_state; | |
a1d8b49a | 556 | spin_unlock_irqrestore(&cmd->t_state_lock, flags); |
c66ac9db NB |
557 | |
558 | return 0; | |
559 | } | |
560 | ||
561 | static int transport_cmd_check_stop_to_fabric(struct se_cmd *cmd) | |
562 | { | |
563 | return transport_cmd_check_stop(cmd, 2, 0); | |
564 | } | |
565 | ||
566 | static void transport_lun_remove_cmd(struct se_cmd *cmd) | |
567 | { | |
e3d6f909 | 568 | struct se_lun *lun = cmd->se_lun; |
c66ac9db NB |
569 | unsigned long flags; |
570 | ||
571 | if (!lun) | |
572 | return; | |
573 | ||
a1d8b49a | 574 | spin_lock_irqsave(&cmd->t_state_lock, flags); |
7d680f3b CH |
575 | if (cmd->transport_state & CMD_T_DEV_ACTIVE) { |
576 | cmd->transport_state &= ~CMD_T_DEV_ACTIVE; | |
cf572a96 | 577 | target_remove_from_state_list(cmd); |
c66ac9db | 578 | } |
a1d8b49a | 579 | spin_unlock_irqrestore(&cmd->t_state_lock, flags); |
c66ac9db | 580 | |
c66ac9db | 581 | spin_lock_irqsave(&lun->lun_cmd_lock, flags); |
3d26fea0 CH |
582 | if (!list_empty(&cmd->se_lun_node)) |
583 | list_del_init(&cmd->se_lun_node); | |
c66ac9db NB |
584 | spin_unlock_irqrestore(&lun->lun_cmd_lock, flags); |
585 | } | |
586 | ||
587 | void transport_cmd_finish_abort(struct se_cmd *cmd, int remove) | |
588 | { | |
c8e31f26 | 589 | if (!(cmd->se_cmd_flags & SCF_SCSI_TMR_CDB)) |
8dc52b54 | 590 | transport_lun_remove_cmd(cmd); |
c66ac9db NB |
591 | |
592 | if (transport_cmd_check_stop_to_fabric(cmd)) | |
593 | return; | |
77039d1e | 594 | if (remove) { |
3df8d40b | 595 | transport_remove_cmd_from_queue(cmd); |
e6a2573f | 596 | transport_put_cmd(cmd); |
77039d1e | 597 | } |
c66ac9db NB |
598 | } |
599 | ||
f7a5cc0b CH |
600 | static void transport_add_cmd_to_queue(struct se_cmd *cmd, int t_state, |
601 | bool at_head) | |
c66ac9db NB |
602 | { |
603 | struct se_device *dev = cmd->se_dev; | |
e3d6f909 | 604 | struct se_queue_obj *qobj = &dev->dev_queue_obj; |
c66ac9db NB |
605 | unsigned long flags; |
606 | ||
c66ac9db | 607 | if (t_state) { |
a1d8b49a | 608 | spin_lock_irqsave(&cmd->t_state_lock, flags); |
c66ac9db | 609 | cmd->t_state = t_state; |
7d680f3b | 610 | cmd->transport_state |= CMD_T_ACTIVE; |
a1d8b49a | 611 | spin_unlock_irqrestore(&cmd->t_state_lock, flags); |
c66ac9db NB |
612 | } |
613 | ||
614 | spin_lock_irqsave(&qobj->cmd_queue_lock, flags); | |
79a7fef2 RD |
615 | |
616 | /* If the cmd is already on the list, remove it before we add it */ | |
617 | if (!list_empty(&cmd->se_queue_node)) | |
618 | list_del(&cmd->se_queue_node); | |
619 | else | |
620 | atomic_inc(&qobj->queue_cnt); | |
621 | ||
f7a5cc0b | 622 | if (at_head) |
07bde79a | 623 | list_add(&cmd->se_queue_node, &qobj->qobj_list); |
f7a5cc0b | 624 | else |
07bde79a | 625 | list_add_tail(&cmd->se_queue_node, &qobj->qobj_list); |
7d680f3b | 626 | cmd->transport_state |= CMD_T_QUEUED; |
c66ac9db NB |
627 | spin_unlock_irqrestore(&qobj->cmd_queue_lock, flags); |
628 | ||
c66ac9db | 629 | wake_up_interruptible(&qobj->thread_wq); |
c66ac9db NB |
630 | } |
631 | ||
5951146d AG |
632 | static struct se_cmd * |
633 | transport_get_cmd_from_queue(struct se_queue_obj *qobj) | |
c66ac9db | 634 | { |
5951146d | 635 | struct se_cmd *cmd; |
c66ac9db NB |
636 | unsigned long flags; |
637 | ||
638 | spin_lock_irqsave(&qobj->cmd_queue_lock, flags); | |
639 | if (list_empty(&qobj->qobj_list)) { | |
640 | spin_unlock_irqrestore(&qobj->cmd_queue_lock, flags); | |
641 | return NULL; | |
642 | } | |
5951146d | 643 | cmd = list_first_entry(&qobj->qobj_list, struct se_cmd, se_queue_node); |
c66ac9db | 644 | |
7d680f3b | 645 | cmd->transport_state &= ~CMD_T_QUEUED; |
79a7fef2 | 646 | list_del_init(&cmd->se_queue_node); |
c66ac9db NB |
647 | atomic_dec(&qobj->queue_cnt); |
648 | spin_unlock_irqrestore(&qobj->cmd_queue_lock, flags); | |
649 | ||
5951146d | 650 | return cmd; |
c66ac9db NB |
651 | } |
652 | ||
3df8d40b | 653 | static void transport_remove_cmd_from_queue(struct se_cmd *cmd) |
c66ac9db | 654 | { |
3df8d40b | 655 | struct se_queue_obj *qobj = &cmd->se_dev->dev_queue_obj; |
c66ac9db NB |
656 | unsigned long flags; |
657 | ||
658 | spin_lock_irqsave(&qobj->cmd_queue_lock, flags); | |
7d680f3b | 659 | if (!(cmd->transport_state & CMD_T_QUEUED)) { |
c66ac9db NB |
660 | spin_unlock_irqrestore(&qobj->cmd_queue_lock, flags); |
661 | return; | |
662 | } | |
7d680f3b | 663 | cmd->transport_state &= ~CMD_T_QUEUED; |
79a7fef2 RD |
664 | atomic_dec(&qobj->queue_cnt); |
665 | list_del_init(&cmd->se_queue_node); | |
c66ac9db | 666 | spin_unlock_irqrestore(&qobj->cmd_queue_lock, flags); |
c66ac9db NB |
667 | } |
668 | ||
35e0e757 CH |
669 | static void target_complete_failure_work(struct work_struct *work) |
670 | { | |
671 | struct se_cmd *cmd = container_of(work, struct se_cmd, work); | |
672 | ||
03e98c9e | 673 | transport_generic_request_failure(cmd); |
35e0e757 CH |
674 | } |
675 | ||
5787cacd | 676 | void target_complete_cmd(struct se_cmd *cmd, u8 scsi_status) |
c66ac9db | 677 | { |
42bf829e | 678 | struct se_device *dev = cmd->se_dev; |
5787cacd | 679 | int success = scsi_status == GOOD; |
c66ac9db | 680 | unsigned long flags; |
c66ac9db | 681 | |
5787cacd CH |
682 | cmd->scsi_status = scsi_status; |
683 | ||
684 | ||
a1d8b49a | 685 | spin_lock_irqsave(&cmd->t_state_lock, flags); |
cf572a96 | 686 | cmd->transport_state &= ~CMD_T_BUSY; |
c66ac9db | 687 | |
c66ac9db | 688 | if (dev && dev->transport->transport_complete) { |
5787cacd CH |
689 | if (dev->transport->transport_complete(cmd, |
690 | cmd->t_data_sg) != 0) { | |
c66ac9db | 691 | cmd->se_cmd_flags |= SCF_TRANSPORT_TASK_SENSE; |
c66ac9db NB |
692 | success = 1; |
693 | } | |
694 | } | |
695 | ||
696 | /* | |
5787cacd | 697 | * See if we are waiting to complete for an exception condition. |
c66ac9db | 698 | */ |
cf572a96 | 699 | if (cmd->transport_state & CMD_T_REQUEST_STOP) { |
a1d8b49a | 700 | spin_unlock_irqrestore(&cmd->t_state_lock, flags); |
cf572a96 | 701 | complete(&cmd->task_stop_comp); |
c66ac9db NB |
702 | return; |
703 | } | |
2235007c CH |
704 | |
705 | if (!success) | |
7d680f3b | 706 | cmd->transport_state |= CMD_T_FAILED; |
2235007c | 707 | |
3d28934a NB |
708 | /* |
709 | * Check for case where an explict ABORT_TASK has been received | |
710 | * and transport_wait_for_tasks() will be waiting for completion.. | |
711 | */ | |
712 | if (cmd->transport_state & CMD_T_ABORTED && | |
713 | cmd->transport_state & CMD_T_STOP) { | |
714 | spin_unlock_irqrestore(&cmd->t_state_lock, flags); | |
715 | complete(&cmd->t_transport_stop_comp); | |
716 | return; | |
717 | } else if (cmd->transport_state & CMD_T_FAILED) { | |
41e16e98 | 718 | cmd->scsi_sense_reason = TCM_LOGICAL_UNIT_COMMUNICATION_FAILURE; |
35e0e757 | 719 | INIT_WORK(&cmd->work, target_complete_failure_work); |
c66ac9db | 720 | } else { |
35e0e757 | 721 | INIT_WORK(&cmd->work, target_complete_ok_work); |
c66ac9db | 722 | } |
35e0e757 | 723 | |
35e0e757 | 724 | cmd->t_state = TRANSPORT_COMPLETE; |
3d28934a | 725 | cmd->transport_state |= (CMD_T_COMPLETE | CMD_T_ACTIVE); |
a1d8b49a | 726 | spin_unlock_irqrestore(&cmd->t_state_lock, flags); |
c66ac9db | 727 | |
35e0e757 | 728 | queue_work(target_completion_wq, &cmd->work); |
c66ac9db | 729 | } |
6bb35e00 CH |
730 | EXPORT_SYMBOL(target_complete_cmd); |
731 | ||
cf572a96 | 732 | static void target_add_to_state_list(struct se_cmd *cmd) |
c66ac9db | 733 | { |
cf572a96 CH |
734 | struct se_device *dev = cmd->se_dev; |
735 | unsigned long flags; | |
c66ac9db | 736 | |
cf572a96 CH |
737 | spin_lock_irqsave(&dev->execute_task_lock, flags); |
738 | if (!cmd->state_active) { | |
739 | list_add_tail(&cmd->state_list, &dev->state_list); | |
740 | cmd->state_active = true; | |
c66ac9db | 741 | } |
cf572a96 | 742 | spin_unlock_irqrestore(&dev->execute_task_lock, flags); |
c66ac9db NB |
743 | } |
744 | ||
cf572a96 | 745 | static void __target_add_to_execute_list(struct se_cmd *cmd) |
c66ac9db | 746 | { |
cf572a96 CH |
747 | struct se_device *dev = cmd->se_dev; |
748 | bool head_of_queue = false; | |
c66ac9db | 749 | |
cf572a96 | 750 | if (!list_empty(&cmd->execute_list)) |
c66ac9db | 751 | return; |
c66ac9db | 752 | |
cf572a96 CH |
753 | if (dev->dev_task_attr_type == SAM_TASK_ATTR_EMULATED && |
754 | cmd->sam_task_attr == MSG_HEAD_TAG) | |
755 | head_of_queue = true; | |
c66ac9db | 756 | |
cf572a96 CH |
757 | if (head_of_queue) |
758 | list_add(&cmd->execute_list, &dev->execute_list); | |
759 | else | |
760 | list_add_tail(&cmd->execute_list, &dev->execute_list); | |
785fdf70 | 761 | |
cf572a96 | 762 | atomic_inc(&dev->execute_tasks); |
1880807a | 763 | |
cf572a96 CH |
764 | if (cmd->state_active) |
765 | return; | |
c66ac9db | 766 | |
cf572a96 CH |
767 | if (head_of_queue) |
768 | list_add(&cmd->state_list, &dev->state_list); | |
769 | else | |
770 | list_add_tail(&cmd->state_list, &dev->state_list); | |
c66ac9db | 771 | |
cf572a96 | 772 | cmd->state_active = true; |
4d2300cc NB |
773 | } |
774 | ||
cf572a96 | 775 | static void target_add_to_execute_list(struct se_cmd *cmd) |
4d2300cc NB |
776 | { |
777 | unsigned long flags; | |
778 | struct se_device *dev = cmd->se_dev; | |
779 | ||
780 | spin_lock_irqsave(&dev->execute_task_lock, flags); | |
cf572a96 | 781 | __target_add_to_execute_list(cmd); |
c66ac9db | 782 | spin_unlock_irqrestore(&dev->execute_task_lock, flags); |
c66ac9db NB |
783 | } |
784 | ||
cf572a96 | 785 | void __target_remove_from_execute_list(struct se_cmd *cmd) |
04629b7b | 786 | { |
cf572a96 CH |
787 | list_del_init(&cmd->execute_list); |
788 | atomic_dec(&cmd->se_dev->execute_tasks); | |
04629b7b CH |
789 | } |
790 | ||
cf572a96 | 791 | static void target_remove_from_execute_list(struct se_cmd *cmd) |
c66ac9db | 792 | { |
cf572a96 | 793 | struct se_device *dev = cmd->se_dev; |
c66ac9db NB |
794 | unsigned long flags; |
795 | ||
cf572a96 | 796 | if (WARN_ON(list_empty(&cmd->execute_list))) |
af57c3ac | 797 | return; |
af57c3ac | 798 | |
c66ac9db | 799 | spin_lock_irqsave(&dev->execute_task_lock, flags); |
cf572a96 | 800 | __target_remove_from_execute_list(cmd); |
c66ac9db NB |
801 | spin_unlock_irqrestore(&dev->execute_task_lock, flags); |
802 | } | |
803 | ||
07bde79a | 804 | /* |
f147abb4 | 805 | * Handle QUEUE_FULL / -EAGAIN and -ENOMEM status |
07bde79a NB |
806 | */ |
807 | ||
808 | static void target_qf_do_work(struct work_struct *work) | |
809 | { | |
810 | struct se_device *dev = container_of(work, struct se_device, | |
811 | qf_work_queue); | |
bcac364a | 812 | LIST_HEAD(qf_cmd_list); |
07bde79a NB |
813 | struct se_cmd *cmd, *cmd_tmp; |
814 | ||
815 | spin_lock_irq(&dev->qf_cmd_lock); | |
bcac364a RD |
816 | list_splice_init(&dev->qf_cmd_list, &qf_cmd_list); |
817 | spin_unlock_irq(&dev->qf_cmd_lock); | |
07bde79a | 818 | |
bcac364a | 819 | list_for_each_entry_safe(cmd, cmd_tmp, &qf_cmd_list, se_qf_node) { |
07bde79a NB |
820 | list_del(&cmd->se_qf_node); |
821 | atomic_dec(&dev->dev_qf_count); | |
822 | smp_mb__after_atomic_dec(); | |
07bde79a | 823 | |
6708bb27 | 824 | pr_debug("Processing %s cmd: %p QUEUE_FULL in work queue" |
07bde79a | 825 | " context: %s\n", cmd->se_tfo->get_fabric_name(), cmd, |
e057f533 | 826 | (cmd->t_state == TRANSPORT_COMPLETE_QF_OK) ? "COMPLETE_OK" : |
07bde79a NB |
827 | (cmd->t_state == TRANSPORT_COMPLETE_QF_WP) ? "WRITE_PENDING" |
828 | : "UNKNOWN"); | |
f7a5cc0b CH |
829 | |
830 | transport_add_cmd_to_queue(cmd, cmd->t_state, true); | |
07bde79a | 831 | } |
07bde79a NB |
832 | } |
833 | ||
c66ac9db NB |
834 | unsigned char *transport_dump_cmd_direction(struct se_cmd *cmd) |
835 | { | |
836 | switch (cmd->data_direction) { | |
837 | case DMA_NONE: | |
838 | return "NONE"; | |
839 | case DMA_FROM_DEVICE: | |
840 | return "READ"; | |
841 | case DMA_TO_DEVICE: | |
842 | return "WRITE"; | |
843 | case DMA_BIDIRECTIONAL: | |
844 | return "BIDI"; | |
845 | default: | |
846 | break; | |
847 | } | |
848 | ||
849 | return "UNKNOWN"; | |
850 | } | |
851 | ||
852 | void transport_dump_dev_state( | |
853 | struct se_device *dev, | |
854 | char *b, | |
855 | int *bl) | |
856 | { | |
857 | *bl += sprintf(b + *bl, "Status: "); | |
858 | switch (dev->dev_status) { | |
859 | case TRANSPORT_DEVICE_ACTIVATED: | |
860 | *bl += sprintf(b + *bl, "ACTIVATED"); | |
861 | break; | |
862 | case TRANSPORT_DEVICE_DEACTIVATED: | |
863 | *bl += sprintf(b + *bl, "DEACTIVATED"); | |
864 | break; | |
865 | case TRANSPORT_DEVICE_SHUTDOWN: | |
866 | *bl += sprintf(b + *bl, "SHUTDOWN"); | |
867 | break; | |
868 | case TRANSPORT_DEVICE_OFFLINE_ACTIVATED: | |
869 | case TRANSPORT_DEVICE_OFFLINE_DEACTIVATED: | |
870 | *bl += sprintf(b + *bl, "OFFLINE"); | |
871 | break; | |
872 | default: | |
873 | *bl += sprintf(b + *bl, "UNKNOWN=%d", dev->dev_status); | |
874 | break; | |
875 | } | |
876 | ||
65586d51 NB |
877 | *bl += sprintf(b + *bl, " Execute/Max Queue Depth: %d/%d", |
878 | atomic_read(&dev->execute_tasks), dev->queue_depth); | |
11e764bd NB |
879 | *bl += sprintf(b + *bl, " SectorSize: %u HwMaxSectors: %u\n", |
880 | dev->se_sub_dev->se_dev_attrib.block_size, | |
881 | dev->se_sub_dev->se_dev_attrib.hw_max_sectors); | |
c66ac9db NB |
882 | *bl += sprintf(b + *bl, " "); |
883 | } | |
884 | ||
c66ac9db NB |
885 | void transport_dump_vpd_proto_id( |
886 | struct t10_vpd *vpd, | |
887 | unsigned char *p_buf, | |
888 | int p_buf_len) | |
889 | { | |
890 | unsigned char buf[VPD_TMP_BUF_SIZE]; | |
891 | int len; | |
892 | ||
893 | memset(buf, 0, VPD_TMP_BUF_SIZE); | |
894 | len = sprintf(buf, "T10 VPD Protocol Identifier: "); | |
895 | ||
896 | switch (vpd->protocol_identifier) { | |
897 | case 0x00: | |
898 | sprintf(buf+len, "Fibre Channel\n"); | |
899 | break; | |
900 | case 0x10: | |
901 | sprintf(buf+len, "Parallel SCSI\n"); | |
902 | break; | |
903 | case 0x20: | |
904 | sprintf(buf+len, "SSA\n"); | |
905 | break; | |
906 | case 0x30: | |
907 | sprintf(buf+len, "IEEE 1394\n"); | |
908 | break; | |
909 | case 0x40: | |
910 | sprintf(buf+len, "SCSI Remote Direct Memory Access" | |
911 | " Protocol\n"); | |
912 | break; | |
913 | case 0x50: | |
914 | sprintf(buf+len, "Internet SCSI (iSCSI)\n"); | |
915 | break; | |
916 | case 0x60: | |
917 | sprintf(buf+len, "SAS Serial SCSI Protocol\n"); | |
918 | break; | |
919 | case 0x70: | |
920 | sprintf(buf+len, "Automation/Drive Interface Transport" | |
921 | " Protocol\n"); | |
922 | break; | |
923 | case 0x80: | |
924 | sprintf(buf+len, "AT Attachment Interface ATA/ATAPI\n"); | |
925 | break; | |
926 | default: | |
927 | sprintf(buf+len, "Unknown 0x%02x\n", | |
928 | vpd->protocol_identifier); | |
929 | break; | |
930 | } | |
931 | ||
932 | if (p_buf) | |
933 | strncpy(p_buf, buf, p_buf_len); | |
934 | else | |
6708bb27 | 935 | pr_debug("%s", buf); |
c66ac9db NB |
936 | } |
937 | ||
938 | void | |
939 | transport_set_vpd_proto_id(struct t10_vpd *vpd, unsigned char *page_83) | |
940 | { | |
941 | /* | |
942 | * Check if the Protocol Identifier Valid (PIV) bit is set.. | |
943 | * | |
944 | * from spc3r23.pdf section 7.5.1 | |
945 | */ | |
946 | if (page_83[1] & 0x80) { | |
947 | vpd->protocol_identifier = (page_83[0] & 0xf0); | |
948 | vpd->protocol_identifier_set = 1; | |
949 | transport_dump_vpd_proto_id(vpd, NULL, 0); | |
950 | } | |
951 | } | |
952 | EXPORT_SYMBOL(transport_set_vpd_proto_id); | |
953 | ||
954 | int transport_dump_vpd_assoc( | |
955 | struct t10_vpd *vpd, | |
956 | unsigned char *p_buf, | |
957 | int p_buf_len) | |
958 | { | |
959 | unsigned char buf[VPD_TMP_BUF_SIZE]; | |
e3d6f909 AG |
960 | int ret = 0; |
961 | int len; | |
c66ac9db NB |
962 | |
963 | memset(buf, 0, VPD_TMP_BUF_SIZE); | |
964 | len = sprintf(buf, "T10 VPD Identifier Association: "); | |
965 | ||
966 | switch (vpd->association) { | |
967 | case 0x00: | |
968 | sprintf(buf+len, "addressed logical unit\n"); | |
969 | break; | |
970 | case 0x10: | |
971 | sprintf(buf+len, "target port\n"); | |
972 | break; | |
973 | case 0x20: | |
974 | sprintf(buf+len, "SCSI target device\n"); | |
975 | break; | |
976 | default: | |
977 | sprintf(buf+len, "Unknown 0x%02x\n", vpd->association); | |
e3d6f909 | 978 | ret = -EINVAL; |
c66ac9db NB |
979 | break; |
980 | } | |
981 | ||
982 | if (p_buf) | |
983 | strncpy(p_buf, buf, p_buf_len); | |
984 | else | |
6708bb27 | 985 | pr_debug("%s", buf); |
c66ac9db NB |
986 | |
987 | return ret; | |
988 | } | |
989 | ||
990 | int transport_set_vpd_assoc(struct t10_vpd *vpd, unsigned char *page_83) | |
991 | { | |
992 | /* | |
993 | * The VPD identification association.. | |
994 | * | |
995 | * from spc3r23.pdf Section 7.6.3.1 Table 297 | |
996 | */ | |
997 | vpd->association = (page_83[1] & 0x30); | |
998 | return transport_dump_vpd_assoc(vpd, NULL, 0); | |
999 | } | |
1000 | EXPORT_SYMBOL(transport_set_vpd_assoc); | |
1001 | ||
1002 | int transport_dump_vpd_ident_type( | |
1003 | struct t10_vpd *vpd, | |
1004 | unsigned char *p_buf, | |
1005 | int p_buf_len) | |
1006 | { | |
1007 | unsigned char buf[VPD_TMP_BUF_SIZE]; | |
e3d6f909 AG |
1008 | int ret = 0; |
1009 | int len; | |
c66ac9db NB |
1010 | |
1011 | memset(buf, 0, VPD_TMP_BUF_SIZE); | |
1012 | len = sprintf(buf, "T10 VPD Identifier Type: "); | |
1013 | ||
1014 | switch (vpd->device_identifier_type) { | |
1015 | case 0x00: | |
1016 | sprintf(buf+len, "Vendor specific\n"); | |
1017 | break; | |
1018 | case 0x01: | |
1019 | sprintf(buf+len, "T10 Vendor ID based\n"); | |
1020 | break; | |
1021 | case 0x02: | |
1022 | sprintf(buf+len, "EUI-64 based\n"); | |
1023 | break; | |
1024 | case 0x03: | |
1025 | sprintf(buf+len, "NAA\n"); | |
1026 | break; | |
1027 | case 0x04: | |
1028 | sprintf(buf+len, "Relative target port identifier\n"); | |
1029 | break; | |
1030 | case 0x08: | |
1031 | sprintf(buf+len, "SCSI name string\n"); | |
1032 | break; | |
1033 | default: | |
1034 | sprintf(buf+len, "Unsupported: 0x%02x\n", | |
1035 | vpd->device_identifier_type); | |
e3d6f909 | 1036 | ret = -EINVAL; |
c66ac9db NB |
1037 | break; |
1038 | } | |
1039 | ||
e3d6f909 AG |
1040 | if (p_buf) { |
1041 | if (p_buf_len < strlen(buf)+1) | |
1042 | return -EINVAL; | |
c66ac9db | 1043 | strncpy(p_buf, buf, p_buf_len); |
e3d6f909 | 1044 | } else { |
6708bb27 | 1045 | pr_debug("%s", buf); |
e3d6f909 | 1046 | } |
c66ac9db NB |
1047 | |
1048 | return ret; | |
1049 | } | |
1050 | ||
1051 | int transport_set_vpd_ident_type(struct t10_vpd *vpd, unsigned char *page_83) | |
1052 | { | |
1053 | /* | |
1054 | * The VPD identifier type.. | |
1055 | * | |
1056 | * from spc3r23.pdf Section 7.6.3.1 Table 298 | |
1057 | */ | |
1058 | vpd->device_identifier_type = (page_83[1] & 0x0f); | |
1059 | return transport_dump_vpd_ident_type(vpd, NULL, 0); | |
1060 | } | |
1061 | EXPORT_SYMBOL(transport_set_vpd_ident_type); | |
1062 | ||
1063 | int transport_dump_vpd_ident( | |
1064 | struct t10_vpd *vpd, | |
1065 | unsigned char *p_buf, | |
1066 | int p_buf_len) | |
1067 | { | |
1068 | unsigned char buf[VPD_TMP_BUF_SIZE]; | |
1069 | int ret = 0; | |
1070 | ||
1071 | memset(buf, 0, VPD_TMP_BUF_SIZE); | |
1072 | ||
1073 | switch (vpd->device_identifier_code_set) { | |
1074 | case 0x01: /* Binary */ | |
1075 | sprintf(buf, "T10 VPD Binary Device Identifier: %s\n", | |
1076 | &vpd->device_identifier[0]); | |
1077 | break; | |
1078 | case 0x02: /* ASCII */ | |
1079 | sprintf(buf, "T10 VPD ASCII Device Identifier: %s\n", | |
1080 | &vpd->device_identifier[0]); | |
1081 | break; | |
1082 | case 0x03: /* UTF-8 */ | |
1083 | sprintf(buf, "T10 VPD UTF-8 Device Identifier: %s\n", | |
1084 | &vpd->device_identifier[0]); | |
1085 | break; | |
1086 | default: | |
1087 | sprintf(buf, "T10 VPD Device Identifier encoding unsupported:" | |
1088 | " 0x%02x", vpd->device_identifier_code_set); | |
e3d6f909 | 1089 | ret = -EINVAL; |
c66ac9db NB |
1090 | break; |
1091 | } | |
1092 | ||
1093 | if (p_buf) | |
1094 | strncpy(p_buf, buf, p_buf_len); | |
1095 | else | |
6708bb27 | 1096 | pr_debug("%s", buf); |
c66ac9db NB |
1097 | |
1098 | return ret; | |
1099 | } | |
1100 | ||
1101 | int | |
1102 | transport_set_vpd_ident(struct t10_vpd *vpd, unsigned char *page_83) | |
1103 | { | |
1104 | static const char hex_str[] = "0123456789abcdef"; | |
1105 | int j = 0, i = 4; /* offset to start of the identifer */ | |
1106 | ||
1107 | /* | |
1108 | * The VPD Code Set (encoding) | |
1109 | * | |
1110 | * from spc3r23.pdf Section 7.6.3.1 Table 296 | |
1111 | */ | |
1112 | vpd->device_identifier_code_set = (page_83[0] & 0x0f); | |
1113 | switch (vpd->device_identifier_code_set) { | |
1114 | case 0x01: /* Binary */ | |
1115 | vpd->device_identifier[j++] = | |
1116 | hex_str[vpd->device_identifier_type]; | |
1117 | while (i < (4 + page_83[3])) { | |
1118 | vpd->device_identifier[j++] = | |
1119 | hex_str[(page_83[i] & 0xf0) >> 4]; | |
1120 | vpd->device_identifier[j++] = | |
1121 | hex_str[page_83[i] & 0x0f]; | |
1122 | i++; | |
1123 | } | |
1124 | break; | |
1125 | case 0x02: /* ASCII */ | |
1126 | case 0x03: /* UTF-8 */ | |
1127 | while (i < (4 + page_83[3])) | |
1128 | vpd->device_identifier[j++] = page_83[i++]; | |
1129 | break; | |
1130 | default: | |
1131 | break; | |
1132 | } | |
1133 | ||
1134 | return transport_dump_vpd_ident(vpd, NULL, 0); | |
1135 | } | |
1136 | EXPORT_SYMBOL(transport_set_vpd_ident); | |
1137 | ||
1138 | static void core_setup_task_attr_emulation(struct se_device *dev) | |
1139 | { | |
1140 | /* | |
1141 | * If this device is from Target_Core_Mod/pSCSI, disable the | |
1142 | * SAM Task Attribute emulation. | |
1143 | * | |
1144 | * This is currently not available in upsream Linux/SCSI Target | |
1145 | * mode code, and is assumed to be disabled while using TCM/pSCSI. | |
1146 | */ | |
e3d6f909 | 1147 | if (dev->transport->transport_type == TRANSPORT_PLUGIN_PHBA_PDEV) { |
c66ac9db NB |
1148 | dev->dev_task_attr_type = SAM_TASK_ATTR_PASSTHROUGH; |
1149 | return; | |
1150 | } | |
1151 | ||
1152 | dev->dev_task_attr_type = SAM_TASK_ATTR_EMULATED; | |
6708bb27 | 1153 | pr_debug("%s: Using SAM_TASK_ATTR_EMULATED for SPC: 0x%02x" |
e3d6f909 AG |
1154 | " device\n", dev->transport->name, |
1155 | dev->transport->get_device_rev(dev)); | |
c66ac9db NB |
1156 | } |
1157 | ||
1158 | static void scsi_dump_inquiry(struct se_device *dev) | |
1159 | { | |
e3d6f909 | 1160 | struct t10_wwn *wwn = &dev->se_sub_dev->t10_wwn; |
e59a41b6 | 1161 | char buf[17]; |
c66ac9db NB |
1162 | int i, device_type; |
1163 | /* | |
1164 | * Print Linux/SCSI style INQUIRY formatting to the kernel ring buffer | |
1165 | */ | |
c66ac9db NB |
1166 | for (i = 0; i < 8; i++) |
1167 | if (wwn->vendor[i] >= 0x20) | |
e59a41b6 | 1168 | buf[i] = wwn->vendor[i]; |
c66ac9db | 1169 | else |
e59a41b6 SAS |
1170 | buf[i] = ' '; |
1171 | buf[i] = '\0'; | |
1172 | pr_debug(" Vendor: %s\n", buf); | |
c66ac9db | 1173 | |
c66ac9db NB |
1174 | for (i = 0; i < 16; i++) |
1175 | if (wwn->model[i] >= 0x20) | |
e59a41b6 | 1176 | buf[i] = wwn->model[i]; |
c66ac9db | 1177 | else |
e59a41b6 SAS |
1178 | buf[i] = ' '; |
1179 | buf[i] = '\0'; | |
1180 | pr_debug(" Model: %s\n", buf); | |
c66ac9db | 1181 | |
c66ac9db NB |
1182 | for (i = 0; i < 4; i++) |
1183 | if (wwn->revision[i] >= 0x20) | |
e59a41b6 | 1184 | buf[i] = wwn->revision[i]; |
c66ac9db | 1185 | else |
e59a41b6 SAS |
1186 | buf[i] = ' '; |
1187 | buf[i] = '\0'; | |
1188 | pr_debug(" Revision: %s\n", buf); | |
c66ac9db | 1189 | |
e3d6f909 | 1190 | device_type = dev->transport->get_device_type(dev); |
6708bb27 AG |
1191 | pr_debug(" Type: %s ", scsi_device_type(device_type)); |
1192 | pr_debug(" ANSI SCSI revision: %02x\n", | |
e3d6f909 | 1193 | dev->transport->get_device_rev(dev)); |
c66ac9db NB |
1194 | } |
1195 | ||
1196 | struct se_device *transport_add_device_to_core_hba( | |
1197 | struct se_hba *hba, | |
1198 | struct se_subsystem_api *transport, | |
1199 | struct se_subsystem_dev *se_dev, | |
1200 | u32 device_flags, | |
1201 | void *transport_dev, | |
1202 | struct se_dev_limits *dev_limits, | |
1203 | const char *inquiry_prod, | |
1204 | const char *inquiry_rev) | |
1205 | { | |
12a18bdc | 1206 | int force_pt; |
c66ac9db NB |
1207 | struct se_device *dev; |
1208 | ||
1209 | dev = kzalloc(sizeof(struct se_device), GFP_KERNEL); | |
6708bb27 AG |
1210 | if (!dev) { |
1211 | pr_err("Unable to allocate memory for se_dev_t\n"); | |
c66ac9db NB |
1212 | return NULL; |
1213 | } | |
c66ac9db | 1214 | |
e3d6f909 | 1215 | transport_init_queue_obj(&dev->dev_queue_obj); |
c66ac9db NB |
1216 | dev->dev_flags = device_flags; |
1217 | dev->dev_status |= TRANSPORT_DEVICE_DEACTIVATED; | |
5951146d | 1218 | dev->dev_ptr = transport_dev; |
c66ac9db NB |
1219 | dev->se_hba = hba; |
1220 | dev->se_sub_dev = se_dev; | |
1221 | dev->transport = transport; | |
c66ac9db NB |
1222 | INIT_LIST_HEAD(&dev->dev_list); |
1223 | INIT_LIST_HEAD(&dev->dev_sep_list); | |
1224 | INIT_LIST_HEAD(&dev->dev_tmr_list); | |
cf572a96 | 1225 | INIT_LIST_HEAD(&dev->execute_list); |
c66ac9db | 1226 | INIT_LIST_HEAD(&dev->delayed_cmd_list); |
cf572a96 | 1227 | INIT_LIST_HEAD(&dev->state_list); |
07bde79a | 1228 | INIT_LIST_HEAD(&dev->qf_cmd_list); |
c66ac9db NB |
1229 | spin_lock_init(&dev->execute_task_lock); |
1230 | spin_lock_init(&dev->delayed_cmd_lock); | |
c66ac9db NB |
1231 | spin_lock_init(&dev->dev_reservation_lock); |
1232 | spin_lock_init(&dev->dev_status_lock); | |
c66ac9db NB |
1233 | spin_lock_init(&dev->se_port_lock); |
1234 | spin_lock_init(&dev->se_tmr_lock); | |
07bde79a | 1235 | spin_lock_init(&dev->qf_cmd_lock); |
c66ac9db NB |
1236 | atomic_set(&dev->dev_ordered_id, 0); |
1237 | ||
1238 | se_dev_set_default_attribs(dev, dev_limits); | |
1239 | ||
1240 | dev->dev_index = scsi_get_new_index(SCSI_DEVICE_INDEX); | |
1241 | dev->creation_time = get_jiffies_64(); | |
1242 | spin_lock_init(&dev->stats_lock); | |
1243 | ||
1244 | spin_lock(&hba->device_lock); | |
1245 | list_add_tail(&dev->dev_list, &hba->hba_dev_list); | |
1246 | hba->dev_count++; | |
1247 | spin_unlock(&hba->device_lock); | |
1248 | /* | |
1249 | * Setup the SAM Task Attribute emulation for struct se_device | |
1250 | */ | |
1251 | core_setup_task_attr_emulation(dev); | |
1252 | /* | |
1253 | * Force PR and ALUA passthrough emulation with internal object use. | |
1254 | */ | |
1255 | force_pt = (hba->hba_flags & HBA_FLAGS_INTERNAL_USE); | |
1256 | /* | |
1257 | * Setup the Reservations infrastructure for struct se_device | |
1258 | */ | |
1259 | core_setup_reservations(dev, force_pt); | |
1260 | /* | |
1261 | * Setup the Asymmetric Logical Unit Assignment for struct se_device | |
1262 | */ | |
1263 | if (core_setup_alua(dev, force_pt) < 0) | |
1264 | goto out; | |
1265 | ||
1266 | /* | |
1267 | * Startup the struct se_device processing thread | |
1268 | */ | |
1269 | dev->process_thread = kthread_run(transport_processing_thread, dev, | |
e3d6f909 | 1270 | "LIO_%s", dev->transport->name); |
c66ac9db | 1271 | if (IS_ERR(dev->process_thread)) { |
6708bb27 | 1272 | pr_err("Unable to create kthread: LIO_%s\n", |
e3d6f909 | 1273 | dev->transport->name); |
c66ac9db NB |
1274 | goto out; |
1275 | } | |
07bde79a NB |
1276 | /* |
1277 | * Setup work_queue for QUEUE_FULL | |
1278 | */ | |
1279 | INIT_WORK(&dev->qf_work_queue, target_qf_do_work); | |
c66ac9db NB |
1280 | /* |
1281 | * Preload the initial INQUIRY const values if we are doing | |
1282 | * anything virtual (IBLOCK, FILEIO, RAMDISK), but not for TCM/pSCSI | |
1283 | * passthrough because this is being provided by the backend LLD. | |
1284 | * This is required so that transport_get_inquiry() copies these | |
1285 | * originals once back into DEV_T10_WWN(dev) for the virtual device | |
1286 | * setup. | |
1287 | */ | |
e3d6f909 | 1288 | if (dev->transport->transport_type != TRANSPORT_PLUGIN_PHBA_PDEV) { |
f22c1196 | 1289 | if (!inquiry_prod || !inquiry_rev) { |
6708bb27 | 1290 | pr_err("All non TCM/pSCSI plugins require" |
c66ac9db NB |
1291 | " INQUIRY consts\n"); |
1292 | goto out; | |
1293 | } | |
1294 | ||
e3d6f909 AG |
1295 | strncpy(&dev->se_sub_dev->t10_wwn.vendor[0], "LIO-ORG", 8); |
1296 | strncpy(&dev->se_sub_dev->t10_wwn.model[0], inquiry_prod, 16); | |
1297 | strncpy(&dev->se_sub_dev->t10_wwn.revision[0], inquiry_rev, 4); | |
c66ac9db NB |
1298 | } |
1299 | scsi_dump_inquiry(dev); | |
1300 | ||
12a18bdc | 1301 | return dev; |
c66ac9db | 1302 | out: |
c66ac9db NB |
1303 | kthread_stop(dev->process_thread); |
1304 | ||
1305 | spin_lock(&hba->device_lock); | |
1306 | list_del(&dev->dev_list); | |
1307 | hba->dev_count--; | |
1308 | spin_unlock(&hba->device_lock); | |
1309 | ||
1310 | se_release_vpd_for_dev(dev); | |
1311 | ||
c66ac9db NB |
1312 | kfree(dev); |
1313 | ||
1314 | return NULL; | |
1315 | } | |
1316 | EXPORT_SYMBOL(transport_add_device_to_core_hba); | |
1317 | ||
1318 | /* transport_generic_prepare_cdb(): | |
1319 | * | |
1320 | * Since the Initiator sees iSCSI devices as LUNs, the SCSI CDB will | |
1321 | * contain the iSCSI LUN in bits 7-5 of byte 1 as per SAM-2. | |
1322 | * The point of this is since we are mapping iSCSI LUNs to | |
1323 | * SCSI Target IDs having a non-zero LUN in the CDB will throw the | |
1324 | * devices and HBAs for a loop. | |
1325 | */ | |
1326 | static inline void transport_generic_prepare_cdb( | |
1327 | unsigned char *cdb) | |
1328 | { | |
1329 | switch (cdb[0]) { | |
1330 | case READ_10: /* SBC - RDProtect */ | |
1331 | case READ_12: /* SBC - RDProtect */ | |
1332 | case READ_16: /* SBC - RDProtect */ | |
1333 | case SEND_DIAGNOSTIC: /* SPC - SELF-TEST Code */ | |
1334 | case VERIFY: /* SBC - VRProtect */ | |
1335 | case VERIFY_16: /* SBC - VRProtect */ | |
1336 | case WRITE_VERIFY: /* SBC - VRProtect */ | |
1337 | case WRITE_VERIFY_12: /* SBC - VRProtect */ | |
ba539743 | 1338 | case MAINTENANCE_IN: /* SPC - Parameter Data Format for SA RTPG */ |
c66ac9db NB |
1339 | break; |
1340 | default: | |
1341 | cdb[1] &= 0x1f; /* clear logical unit number */ | |
1342 | break; | |
1343 | } | |
1344 | } | |
1345 | ||
c66ac9db NB |
1346 | static int transport_generic_cmd_sequencer(struct se_cmd *, unsigned char *); |
1347 | ||
c66ac9db NB |
1348 | /* |
1349 | * Used by fabric modules containing a local struct se_cmd within their | |
1350 | * fabric dependent per I/O descriptor. | |
1351 | */ | |
1352 | void transport_init_se_cmd( | |
1353 | struct se_cmd *cmd, | |
1354 | struct target_core_fabric_ops *tfo, | |
1355 | struct se_session *se_sess, | |
1356 | u32 data_length, | |
1357 | int data_direction, | |
1358 | int task_attr, | |
1359 | unsigned char *sense_buffer) | |
1360 | { | |
5951146d AG |
1361 | INIT_LIST_HEAD(&cmd->se_lun_node); |
1362 | INIT_LIST_HEAD(&cmd->se_delayed_node); | |
07bde79a | 1363 | INIT_LIST_HEAD(&cmd->se_qf_node); |
79a7fef2 | 1364 | INIT_LIST_HEAD(&cmd->se_queue_node); |
a17f091d | 1365 | INIT_LIST_HEAD(&cmd->se_cmd_list); |
cf572a96 CH |
1366 | INIT_LIST_HEAD(&cmd->execute_list); |
1367 | INIT_LIST_HEAD(&cmd->state_list); | |
a1d8b49a AG |
1368 | init_completion(&cmd->transport_lun_fe_stop_comp); |
1369 | init_completion(&cmd->transport_lun_stop_comp); | |
1370 | init_completion(&cmd->t_transport_stop_comp); | |
a17f091d | 1371 | init_completion(&cmd->cmd_wait_comp); |
cf572a96 | 1372 | init_completion(&cmd->task_stop_comp); |
a1d8b49a | 1373 | spin_lock_init(&cmd->t_state_lock); |
7d680f3b | 1374 | cmd->transport_state = CMD_T_DEV_ACTIVE; |
c66ac9db NB |
1375 | |
1376 | cmd->se_tfo = tfo; | |
1377 | cmd->se_sess = se_sess; | |
1378 | cmd->data_length = data_length; | |
1379 | cmd->data_direction = data_direction; | |
1380 | cmd->sam_task_attr = task_attr; | |
1381 | cmd->sense_buffer = sense_buffer; | |
cf572a96 CH |
1382 | |
1383 | cmd->state_active = false; | |
c66ac9db NB |
1384 | } |
1385 | EXPORT_SYMBOL(transport_init_se_cmd); | |
1386 | ||
1387 | static int transport_check_alloc_task_attr(struct se_cmd *cmd) | |
1388 | { | |
1389 | /* | |
1390 | * Check if SAM Task Attribute emulation is enabled for this | |
1391 | * struct se_device storage object | |
1392 | */ | |
5951146d | 1393 | if (cmd->se_dev->dev_task_attr_type != SAM_TASK_ATTR_EMULATED) |
c66ac9db NB |
1394 | return 0; |
1395 | ||
e66ecd50 | 1396 | if (cmd->sam_task_attr == MSG_ACA_TAG) { |
6708bb27 | 1397 | pr_debug("SAM Task Attribute ACA" |
c66ac9db | 1398 | " emulation is not supported\n"); |
e3d6f909 | 1399 | return -EINVAL; |
c66ac9db NB |
1400 | } |
1401 | /* | |
1402 | * Used to determine when ORDERED commands should go from | |
1403 | * Dormant to Active status. | |
1404 | */ | |
5951146d | 1405 | cmd->se_ordered_id = atomic_inc_return(&cmd->se_dev->dev_ordered_id); |
c66ac9db | 1406 | smp_mb__after_atomic_inc(); |
6708bb27 | 1407 | pr_debug("Allocated se_ordered_id: %u for Task Attr: 0x%02x on %s\n", |
c66ac9db | 1408 | cmd->se_ordered_id, cmd->sam_task_attr, |
6708bb27 | 1409 | cmd->se_dev->transport->name); |
c66ac9db NB |
1410 | return 0; |
1411 | } | |
1412 | ||
a12f41f8 | 1413 | /* target_setup_cmd_from_cdb(): |
c66ac9db NB |
1414 | * |
1415 | * Called from fabric RX Thread. | |
1416 | */ | |
a12f41f8 | 1417 | int target_setup_cmd_from_cdb( |
c66ac9db NB |
1418 | struct se_cmd *cmd, |
1419 | unsigned char *cdb) | |
1420 | { | |
1421 | int ret; | |
1422 | ||
1423 | transport_generic_prepare_cdb(cdb); | |
c66ac9db NB |
1424 | /* |
1425 | * Ensure that the received CDB is less than the max (252 + 8) bytes | |
1426 | * for VARIABLE_LENGTH_CMD | |
1427 | */ | |
1428 | if (scsi_command_size(cdb) > SCSI_MAX_VARLEN_CDB_SIZE) { | |
6708bb27 | 1429 | pr_err("Received SCSI CDB with command_size: %d that" |
c66ac9db NB |
1430 | " exceeds SCSI_MAX_VARLEN_CDB_SIZE: %d\n", |
1431 | scsi_command_size(cdb), SCSI_MAX_VARLEN_CDB_SIZE); | |
03e98c9e NB |
1432 | cmd->se_cmd_flags |= SCF_SCSI_CDB_EXCEPTION; |
1433 | cmd->scsi_sense_reason = TCM_INVALID_CDB_FIELD; | |
e3d6f909 | 1434 | return -EINVAL; |
c66ac9db NB |
1435 | } |
1436 | /* | |
1437 | * If the received CDB is larger than TCM_MAX_COMMAND_SIZE, | |
1438 | * allocate the additional extended CDB buffer now.. Otherwise | |
1439 | * setup the pointer from __t_task_cdb to t_task_cdb. | |
1440 | */ | |
a1d8b49a AG |
1441 | if (scsi_command_size(cdb) > sizeof(cmd->__t_task_cdb)) { |
1442 | cmd->t_task_cdb = kzalloc(scsi_command_size(cdb), | |
c66ac9db | 1443 | GFP_KERNEL); |
6708bb27 AG |
1444 | if (!cmd->t_task_cdb) { |
1445 | pr_err("Unable to allocate cmd->t_task_cdb" | |
a1d8b49a | 1446 | " %u > sizeof(cmd->__t_task_cdb): %lu ops\n", |
c66ac9db | 1447 | scsi_command_size(cdb), |
a1d8b49a | 1448 | (unsigned long)sizeof(cmd->__t_task_cdb)); |
03e98c9e NB |
1449 | cmd->se_cmd_flags |= SCF_SCSI_CDB_EXCEPTION; |
1450 | cmd->scsi_sense_reason = | |
1451 | TCM_LOGICAL_UNIT_COMMUNICATION_FAILURE; | |
e3d6f909 | 1452 | return -ENOMEM; |
c66ac9db NB |
1453 | } |
1454 | } else | |
a1d8b49a | 1455 | cmd->t_task_cdb = &cmd->__t_task_cdb[0]; |
c66ac9db | 1456 | /* |
a1d8b49a | 1457 | * Copy the original CDB into cmd-> |
c66ac9db | 1458 | */ |
a1d8b49a | 1459 | memcpy(cmd->t_task_cdb, cdb, scsi_command_size(cdb)); |
c66ac9db NB |
1460 | /* |
1461 | * Setup the received CDB based on SCSI defined opcodes and | |
1462 | * perform unit attention, persistent reservations and ALUA | |
a1d8b49a | 1463 | * checks for virtual device backends. The cmd->t_task_cdb |
c66ac9db NB |
1464 | * pointer is expected to be setup before we reach this point. |
1465 | */ | |
1466 | ret = transport_generic_cmd_sequencer(cmd, cdb); | |
1467 | if (ret < 0) | |
1468 | return ret; | |
1469 | /* | |
1470 | * Check for SAM Task Attribute Emulation | |
1471 | */ | |
1472 | if (transport_check_alloc_task_attr(cmd) < 0) { | |
1473 | cmd->se_cmd_flags |= SCF_SCSI_CDB_EXCEPTION; | |
1474 | cmd->scsi_sense_reason = TCM_INVALID_CDB_FIELD; | |
5951146d | 1475 | return -EINVAL; |
c66ac9db NB |
1476 | } |
1477 | spin_lock(&cmd->se_lun->lun_sep_lock); | |
1478 | if (cmd->se_lun->lun_sep) | |
1479 | cmd->se_lun->lun_sep->sep_stats.cmd_pdus++; | |
1480 | spin_unlock(&cmd->se_lun->lun_sep_lock); | |
1481 | return 0; | |
1482 | } | |
a12f41f8 | 1483 | EXPORT_SYMBOL(target_setup_cmd_from_cdb); |
c66ac9db | 1484 | |
695434e1 NB |
1485 | /* |
1486 | * Used by fabric module frontends to queue tasks directly. | |
1487 | * Many only be used from process context only | |
1488 | */ | |
1489 | int transport_handle_cdb_direct( | |
1490 | struct se_cmd *cmd) | |
1491 | { | |
dd8ae59d NB |
1492 | int ret; |
1493 | ||
695434e1 NB |
1494 | if (!cmd->se_lun) { |
1495 | dump_stack(); | |
6708bb27 | 1496 | pr_err("cmd->se_lun is NULL\n"); |
695434e1 NB |
1497 | return -EINVAL; |
1498 | } | |
1499 | if (in_interrupt()) { | |
1500 | dump_stack(); | |
6708bb27 | 1501 | pr_err("transport_generic_handle_cdb cannot be called" |
695434e1 NB |
1502 | " from interrupt context\n"); |
1503 | return -EINVAL; | |
1504 | } | |
dd8ae59d | 1505 | /* |
7d680f3b | 1506 | * Set TRANSPORT_NEW_CMD state and CMD_T_ACTIVE following |
dd8ae59d NB |
1507 | * transport_generic_handle_cdb*() -> transport_add_cmd_to_queue() |
1508 | * in existing usage to ensure that outstanding descriptors are handled | |
d14921d6 | 1509 | * correctly during shutdown via transport_wait_for_tasks() |
dd8ae59d NB |
1510 | * |
1511 | * Also, we don't take cmd->t_state_lock here as we only expect | |
1512 | * this to be called for initial descriptor submission. | |
1513 | */ | |
1514 | cmd->t_state = TRANSPORT_NEW_CMD; | |
7d680f3b CH |
1515 | cmd->transport_state |= CMD_T_ACTIVE; |
1516 | ||
dd8ae59d NB |
1517 | /* |
1518 | * transport_generic_new_cmd() is already handling QUEUE_FULL, | |
1519 | * so follow TRANSPORT_NEW_CMD processing thread context usage | |
1520 | * and call transport_generic_request_failure() if necessary.. | |
1521 | */ | |
1522 | ret = transport_generic_new_cmd(cmd); | |
03e98c9e NB |
1523 | if (ret < 0) |
1524 | transport_generic_request_failure(cmd); | |
1525 | ||
dd8ae59d | 1526 | return 0; |
695434e1 NB |
1527 | } |
1528 | EXPORT_SYMBOL(transport_handle_cdb_direct); | |
1529 | ||
a6360785 NB |
1530 | /** |
1531 | * target_submit_cmd - lookup unpacked lun and submit uninitialized se_cmd | |
1532 | * | |
1533 | * @se_cmd: command descriptor to submit | |
1534 | * @se_sess: associated se_sess for endpoint | |
1535 | * @cdb: pointer to SCSI CDB | |
1536 | * @sense: pointer to SCSI sense buffer | |
1537 | * @unpacked_lun: unpacked LUN to reference for struct se_lun | |
1538 | * @data_length: fabric expected data transfer length | |
1539 | * @task_addr: SAM task attribute | |
1540 | * @data_dir: DMA data direction | |
1541 | * @flags: flags for command submission from target_sc_flags_tables | |
1542 | * | |
1543 | * This may only be called from process context, and also currently | |
1544 | * assumes internal allocation of fabric payload buffer by target-core. | |
1545 | **/ | |
1edcdb49 | 1546 | void target_submit_cmd(struct se_cmd *se_cmd, struct se_session *se_sess, |
a6360785 NB |
1547 | unsigned char *cdb, unsigned char *sense, u32 unpacked_lun, |
1548 | u32 data_length, int task_attr, int data_dir, int flags) | |
1549 | { | |
1550 | struct se_portal_group *se_tpg; | |
1551 | int rc; | |
1552 | ||
1553 | se_tpg = se_sess->se_tpg; | |
1554 | BUG_ON(!se_tpg); | |
1555 | BUG_ON(se_cmd->se_tfo || se_cmd->se_sess); | |
1556 | BUG_ON(in_interrupt()); | |
1557 | /* | |
1558 | * Initialize se_cmd for target operation. From this point | |
1559 | * exceptions are handled by sending exception status via | |
1560 | * target_core_fabric_ops->queue_status() callback | |
1561 | */ | |
1562 | transport_init_se_cmd(se_cmd, se_tpg->se_tpg_tfo, se_sess, | |
1563 | data_length, data_dir, task_attr, sense); | |
b0d79946 SAS |
1564 | if (flags & TARGET_SCF_UNKNOWN_SIZE) |
1565 | se_cmd->unknown_data_length = 1; | |
a6360785 NB |
1566 | /* |
1567 | * Obtain struct se_cmd->cmd_kref reference and add new cmd to | |
1568 | * se_sess->sess_cmd_list. A second kref_get here is necessary | |
1569 | * for fabrics using TARGET_SCF_ACK_KREF that expect a second | |
1570 | * kref_put() to happen during fabric packet acknowledgement. | |
1571 | */ | |
1572 | target_get_sess_cmd(se_sess, se_cmd, (flags & TARGET_SCF_ACK_KREF)); | |
1573 | /* | |
1574 | * Signal bidirectional data payloads to target-core | |
1575 | */ | |
1576 | if (flags & TARGET_SCF_BIDI_OP) | |
1577 | se_cmd->se_cmd_flags |= SCF_BIDI; | |
1578 | /* | |
1579 | * Locate se_lun pointer and attach it to struct se_cmd | |
1580 | */ | |
735703ca NB |
1581 | if (transport_lookup_cmd_lun(se_cmd, unpacked_lun) < 0) { |
1582 | transport_send_check_condition_and_sense(se_cmd, | |
1583 | se_cmd->scsi_sense_reason, 0); | |
1584 | target_put_sess_cmd(se_sess, se_cmd); | |
1585 | return; | |
1586 | } | |
a6360785 NB |
1587 | /* |
1588 | * Sanitize CDBs via transport_generic_cmd_sequencer() and | |
1589 | * allocate the necessary tasks to complete the received CDB+data | |
1590 | */ | |
a12f41f8 | 1591 | rc = target_setup_cmd_from_cdb(se_cmd, cdb); |
735703ca NB |
1592 | if (rc != 0) { |
1593 | transport_generic_request_failure(se_cmd); | |
1594 | return; | |
1595 | } | |
11e319ed AG |
1596 | |
1597 | /* | |
1598 | * Check if we need to delay processing because of ALUA | |
1599 | * Active/NonOptimized primary access state.. | |
1600 | */ | |
1601 | core_alua_check_nonop_delay(se_cmd); | |
1602 | ||
a6360785 NB |
1603 | /* |
1604 | * Dispatch se_cmd descriptor to se_lun->lun_se_dev backend | |
1605 | * for immediate execution of READs, otherwise wait for | |
1606 | * transport_generic_handle_data() to be called for WRITEs | |
1607 | * when fabric has filled the incoming buffer. | |
1608 | */ | |
1609 | transport_handle_cdb_direct(se_cmd); | |
1edcdb49 | 1610 | return; |
a6360785 NB |
1611 | } |
1612 | EXPORT_SYMBOL(target_submit_cmd); | |
1613 | ||
9f0d05c2 NB |
1614 | static void target_complete_tmr_failure(struct work_struct *work) |
1615 | { | |
1616 | struct se_cmd *se_cmd = container_of(work, struct se_cmd, work); | |
1617 | ||
1618 | se_cmd->se_tmr_req->response = TMR_LUN_DOES_NOT_EXIST; | |
1619 | se_cmd->se_tfo->queue_tm_rsp(se_cmd); | |
1620 | transport_generic_free_cmd(se_cmd, 0); | |
1621 | } | |
1622 | ||
ea98d7f9 AG |
1623 | /** |
1624 | * target_submit_tmr - lookup unpacked lun and submit uninitialized se_cmd | |
1625 | * for TMR CDBs | |
1626 | * | |
1627 | * @se_cmd: command descriptor to submit | |
1628 | * @se_sess: associated se_sess for endpoint | |
1629 | * @sense: pointer to SCSI sense buffer | |
1630 | * @unpacked_lun: unpacked LUN to reference for struct se_lun | |
1631 | * @fabric_context: fabric context for TMR req | |
1632 | * @tm_type: Type of TM request | |
c0974f89 NB |
1633 | * @gfp: gfp type for caller |
1634 | * @tag: referenced task tag for TMR_ABORT_TASK | |
c7042cae | 1635 | * @flags: submit cmd flags |
ea98d7f9 AG |
1636 | * |
1637 | * Callable from all contexts. | |
1638 | **/ | |
1639 | ||
c7042cae | 1640 | int target_submit_tmr(struct se_cmd *se_cmd, struct se_session *se_sess, |
ea98d7f9 | 1641 | unsigned char *sense, u32 unpacked_lun, |
c0974f89 NB |
1642 | void *fabric_tmr_ptr, unsigned char tm_type, |
1643 | gfp_t gfp, unsigned int tag, int flags) | |
ea98d7f9 AG |
1644 | { |
1645 | struct se_portal_group *se_tpg; | |
1646 | int ret; | |
1647 | ||
1648 | se_tpg = se_sess->se_tpg; | |
1649 | BUG_ON(!se_tpg); | |
1650 | ||
1651 | transport_init_se_cmd(se_cmd, se_tpg->se_tpg_tfo, se_sess, | |
1652 | 0, DMA_NONE, MSG_SIMPLE_TAG, sense); | |
c7042cae NB |
1653 | /* |
1654 | * FIXME: Currently expect caller to handle se_cmd->se_tmr_req | |
1655 | * allocation failure. | |
1656 | */ | |
c0974f89 | 1657 | ret = core_tmr_alloc_req(se_cmd, fabric_tmr_ptr, tm_type, gfp); |
c7042cae NB |
1658 | if (ret < 0) |
1659 | return -ENOMEM; | |
ea98d7f9 | 1660 | |
c0974f89 NB |
1661 | if (tm_type == TMR_ABORT_TASK) |
1662 | se_cmd->se_tmr_req->ref_task_tag = tag; | |
1663 | ||
ea98d7f9 AG |
1664 | /* See target_submit_cmd for commentary */ |
1665 | target_get_sess_cmd(se_sess, se_cmd, (flags & TARGET_SCF_ACK_KREF)); | |
1666 | ||
ea98d7f9 AG |
1667 | ret = transport_lookup_tmr_lun(se_cmd, unpacked_lun); |
1668 | if (ret) { | |
9f0d05c2 NB |
1669 | /* |
1670 | * For callback during failure handling, push this work off | |
1671 | * to process context with TMR_LUN_DOES_NOT_EXIST status. | |
1672 | */ | |
1673 | INIT_WORK(&se_cmd->work, target_complete_tmr_failure); | |
1674 | schedule_work(&se_cmd->work); | |
c7042cae | 1675 | return 0; |
ea98d7f9 AG |
1676 | } |
1677 | transport_generic_handle_tmr(se_cmd); | |
c7042cae | 1678 | return 0; |
ea98d7f9 AG |
1679 | } |
1680 | EXPORT_SYMBOL(target_submit_tmr); | |
1681 | ||
c66ac9db NB |
1682 | /* |
1683 | * Used by fabric module frontends defining a TFO->new_cmd_map() caller | |
1684 | * to queue up a newly setup se_cmd w/ TRANSPORT_NEW_CMD_MAP in order to | |
1685 | * complete setup in TCM process context w/ TFO->new_cmd_map(). | |
1686 | */ | |
1687 | int transport_generic_handle_cdb_map( | |
1688 | struct se_cmd *cmd) | |
1689 | { | |
e3d6f909 | 1690 | if (!cmd->se_lun) { |
c66ac9db | 1691 | dump_stack(); |
6708bb27 | 1692 | pr_err("cmd->se_lun is NULL\n"); |
e3d6f909 | 1693 | return -EINVAL; |
c66ac9db NB |
1694 | } |
1695 | ||
f7a5cc0b | 1696 | transport_add_cmd_to_queue(cmd, TRANSPORT_NEW_CMD_MAP, false); |
c66ac9db NB |
1697 | return 0; |
1698 | } | |
1699 | EXPORT_SYMBOL(transport_generic_handle_cdb_map); | |
1700 | ||
1701 | /* transport_generic_handle_data(): | |
1702 | * | |
1703 | * | |
1704 | */ | |
1705 | int transport_generic_handle_data( | |
1706 | struct se_cmd *cmd) | |
1707 | { | |
1708 | /* | |
1709 | * For the software fabric case, then we assume the nexus is being | |
1710 | * failed/shutdown when signals are pending from the kthread context | |
1711 | * caller, so we return a failure. For the HW target mode case running | |
1712 | * in interrupt code, the signal_pending() check is skipped. | |
1713 | */ | |
1714 | if (!in_interrupt() && signal_pending(current)) | |
e3d6f909 | 1715 | return -EPERM; |
c66ac9db NB |
1716 | /* |
1717 | * If the received CDB has aleady been ABORTED by the generic | |
1718 | * target engine, we now call transport_check_aborted_status() | |
1719 | * to queue any delated TASK_ABORTED status for the received CDB to the | |
25985edc | 1720 | * fabric module as we are expecting no further incoming DATA OUT |
c66ac9db NB |
1721 | * sequences at this point. |
1722 | */ | |
1723 | if (transport_check_aborted_status(cmd, 1) != 0) | |
1724 | return 0; | |
1725 | ||
f7a5cc0b | 1726 | transport_add_cmd_to_queue(cmd, TRANSPORT_PROCESS_WRITE, false); |
c66ac9db NB |
1727 | return 0; |
1728 | } | |
1729 | EXPORT_SYMBOL(transport_generic_handle_data); | |
1730 | ||
1731 | /* transport_generic_handle_tmr(): | |
1732 | * | |
1733 | * | |
1734 | */ | |
1735 | int transport_generic_handle_tmr( | |
1736 | struct se_cmd *cmd) | |
1737 | { | |
f7a5cc0b | 1738 | transport_add_cmd_to_queue(cmd, TRANSPORT_PROCESS_TMR, false); |
c66ac9db NB |
1739 | return 0; |
1740 | } | |
1741 | EXPORT_SYMBOL(transport_generic_handle_tmr); | |
1742 | ||
cdbb70bb | 1743 | /* |
cf572a96 | 1744 | * If the cmd is active, request it to be stopped and sleep until it |
cdbb70bb CH |
1745 | * has completed. |
1746 | */ | |
cf572a96 | 1747 | bool target_stop_cmd(struct se_cmd *cmd, unsigned long *flags) |
cdbb70bb | 1748 | { |
cdbb70bb CH |
1749 | bool was_active = false; |
1750 | ||
cf572a96 CH |
1751 | if (cmd->transport_state & CMD_T_BUSY) { |
1752 | cmd->transport_state |= CMD_T_REQUEST_STOP; | |
cdbb70bb CH |
1753 | spin_unlock_irqrestore(&cmd->t_state_lock, *flags); |
1754 | ||
cf572a96 CH |
1755 | pr_debug("cmd %p waiting to complete\n", cmd); |
1756 | wait_for_completion(&cmd->task_stop_comp); | |
1757 | pr_debug("cmd %p stopped successfully\n", cmd); | |
cdbb70bb CH |
1758 | |
1759 | spin_lock_irqsave(&cmd->t_state_lock, *flags); | |
cf572a96 CH |
1760 | cmd->transport_state &= ~CMD_T_REQUEST_STOP; |
1761 | cmd->transport_state &= ~CMD_T_BUSY; | |
cdbb70bb CH |
1762 | was_active = true; |
1763 | } | |
1764 | ||
cdbb70bb CH |
1765 | return was_active; |
1766 | } | |
1767 | ||
c66ac9db NB |
1768 | /* |
1769 | * Handle SAM-esque emulation for generic transport request failures. | |
1770 | */ | |
2fbff127 | 1771 | void transport_generic_request_failure(struct se_cmd *cmd) |
c66ac9db | 1772 | { |
07bde79a NB |
1773 | int ret = 0; |
1774 | ||
6708bb27 | 1775 | pr_debug("-----[ Storage Engine Exception for cmd: %p ITT: 0x%08x" |
e3d6f909 | 1776 | " CDB: 0x%02x\n", cmd, cmd->se_tfo->get_task_tag(cmd), |
a1d8b49a | 1777 | cmd->t_task_cdb[0]); |
03e98c9e | 1778 | pr_debug("-----[ i_state: %d t_state: %d scsi_sense_reason: %d\n", |
e3d6f909 | 1779 | cmd->se_tfo->get_cmd_state(cmd), |
03e98c9e | 1780 | cmd->t_state, cmd->scsi_sense_reason); |
d43d6aea | 1781 | pr_debug("-----[ CMD_T_ACTIVE: %d CMD_T_STOP: %d CMD_T_SENT: %d\n", |
7d680f3b CH |
1782 | (cmd->transport_state & CMD_T_ACTIVE) != 0, |
1783 | (cmd->transport_state & CMD_T_STOP) != 0, | |
1784 | (cmd->transport_state & CMD_T_SENT) != 0); | |
c66ac9db | 1785 | |
c66ac9db NB |
1786 | /* |
1787 | * For SAM Task Attribute emulation for failed struct se_cmd | |
1788 | */ | |
1789 | if (cmd->se_dev->dev_task_attr_type == SAM_TASK_ATTR_EMULATED) | |
1790 | transport_complete_task_attr(cmd); | |
1791 | ||
03e98c9e NB |
1792 | switch (cmd->scsi_sense_reason) { |
1793 | case TCM_NON_EXISTENT_LUN: | |
1794 | case TCM_UNSUPPORTED_SCSI_OPCODE: | |
1795 | case TCM_INVALID_CDB_FIELD: | |
1796 | case TCM_INVALID_PARAMETER_LIST: | |
1797 | case TCM_LOGICAL_UNIT_COMMUNICATION_FAILURE: | |
1798 | case TCM_UNKNOWN_MODE_PAGE: | |
1799 | case TCM_WRITE_PROTECTED: | |
1800 | case TCM_CHECK_CONDITION_ABORT_CMD: | |
1801 | case TCM_CHECK_CONDITION_UNIT_ATTENTION: | |
1802 | case TCM_CHECK_CONDITION_NOT_READY: | |
c66ac9db | 1803 | break; |
03e98c9e | 1804 | case TCM_RESERVATION_CONFLICT: |
c66ac9db NB |
1805 | /* |
1806 | * No SENSE Data payload for this case, set SCSI Status | |
1807 | * and queue the response to $FABRIC_MOD. | |
1808 | * | |
1809 | * Uses linux/include/scsi/scsi.h SAM status codes defs | |
1810 | */ | |
1811 | cmd->scsi_status = SAM_STAT_RESERVATION_CONFLICT; | |
1812 | /* | |
1813 | * For UA Interlock Code 11b, a RESERVATION CONFLICT will | |
1814 | * establish a UNIT ATTENTION with PREVIOUS RESERVATION | |
1815 | * CONFLICT STATUS. | |
1816 | * | |
1817 | * See spc4r17, section 7.4.6 Control Mode Page, Table 349 | |
1818 | */ | |
e3d6f909 AG |
1819 | if (cmd->se_sess && |
1820 | cmd->se_dev->se_sub_dev->se_dev_attrib.emulate_ua_intlck_ctrl == 2) | |
1821 | core_scsi3_ua_allocate(cmd->se_sess->se_node_acl, | |
c66ac9db NB |
1822 | cmd->orig_fe_lun, 0x2C, |
1823 | ASCQ_2CH_PREVIOUS_RESERVATION_CONFLICT_STATUS); | |
1824 | ||
07bde79a | 1825 | ret = cmd->se_tfo->queue_status(cmd); |
f147abb4 | 1826 | if (ret == -EAGAIN || ret == -ENOMEM) |
07bde79a | 1827 | goto queue_full; |
c66ac9db | 1828 | goto check_stop; |
c66ac9db | 1829 | default: |
6708bb27 | 1830 | pr_err("Unknown transport error for CDB 0x%02x: %d\n", |
03e98c9e | 1831 | cmd->t_task_cdb[0], cmd->scsi_sense_reason); |
c66ac9db NB |
1832 | cmd->scsi_sense_reason = TCM_UNSUPPORTED_SCSI_OPCODE; |
1833 | break; | |
1834 | } | |
16ab8e60 NB |
1835 | /* |
1836 | * If a fabric does not define a cmd->se_tfo->new_cmd_map caller, | |
1837 | * make the call to transport_send_check_condition_and_sense() | |
1838 | * directly. Otherwise expect the fabric to make the call to | |
1839 | * transport_send_check_condition_and_sense() after handling | |
1840 | * possible unsoliticied write data payloads. | |
1841 | */ | |
03e98c9e NB |
1842 | ret = transport_send_check_condition_and_sense(cmd, |
1843 | cmd->scsi_sense_reason, 0); | |
1844 | if (ret == -EAGAIN || ret == -ENOMEM) | |
1845 | goto queue_full; | |
07bde79a | 1846 | |
c66ac9db NB |
1847 | check_stop: |
1848 | transport_lun_remove_cmd(cmd); | |
6708bb27 | 1849 | if (!transport_cmd_check_stop_to_fabric(cmd)) |
c66ac9db | 1850 | ; |
07bde79a NB |
1851 | return; |
1852 | ||
1853 | queue_full: | |
e057f533 CH |
1854 | cmd->t_state = TRANSPORT_COMPLETE_QF_OK; |
1855 | transport_handle_queue_full(cmd, cmd->se_dev); | |
c66ac9db | 1856 | } |
2fbff127 | 1857 | EXPORT_SYMBOL(transport_generic_request_failure); |
c66ac9db | 1858 | |
c66ac9db NB |
1859 | static inline u32 transport_lba_21(unsigned char *cdb) |
1860 | { | |
1861 | return ((cdb[1] & 0x1f) << 16) | (cdb[2] << 8) | cdb[3]; | |
1862 | } | |
1863 | ||
1864 | static inline u32 transport_lba_32(unsigned char *cdb) | |
1865 | { | |
1866 | return (cdb[2] << 24) | (cdb[3] << 16) | (cdb[4] << 8) | cdb[5]; | |
1867 | } | |
1868 | ||
1869 | static inline unsigned long long transport_lba_64(unsigned char *cdb) | |
1870 | { | |
1871 | unsigned int __v1, __v2; | |
1872 | ||
1873 | __v1 = (cdb[2] << 24) | (cdb[3] << 16) | (cdb[4] << 8) | cdb[5]; | |
1874 | __v2 = (cdb[6] << 24) | (cdb[7] << 16) | (cdb[8] << 8) | cdb[9]; | |
1875 | ||
1876 | return ((unsigned long long)__v2) | (unsigned long long)__v1 << 32; | |
1877 | } | |
1878 | ||
1879 | /* | |
1880 | * For VARIABLE_LENGTH_CDB w/ 32 byte extended CDBs | |
1881 | */ | |
1882 | static inline unsigned long long transport_lba_64_ext(unsigned char *cdb) | |
1883 | { | |
1884 | unsigned int __v1, __v2; | |
1885 | ||
1886 | __v1 = (cdb[12] << 24) | (cdb[13] << 16) | (cdb[14] << 8) | cdb[15]; | |
1887 | __v2 = (cdb[16] << 24) | (cdb[17] << 16) | (cdb[18] << 8) | cdb[19]; | |
1888 | ||
1889 | return ((unsigned long long)__v2) | (unsigned long long)__v1 << 32; | |
1890 | } | |
1891 | ||
1892 | static void transport_set_supported_SAM_opcode(struct se_cmd *se_cmd) | |
1893 | { | |
1894 | unsigned long flags; | |
1895 | ||
a1d8b49a | 1896 | spin_lock_irqsave(&se_cmd->t_state_lock, flags); |
c66ac9db | 1897 | se_cmd->se_cmd_flags |= SCF_SUPPORTED_SAM_OPCODE; |
a1d8b49a | 1898 | spin_unlock_irqrestore(&se_cmd->t_state_lock, flags); |
c66ac9db NB |
1899 | } |
1900 | ||
c66ac9db NB |
1901 | /* |
1902 | * Called from Fabric Module context from transport_execute_tasks() | |
1903 | * | |
1904 | * The return of this function determins if the tasks from struct se_cmd | |
1905 | * get added to the execution queue in transport_execute_tasks(), | |
1906 | * or are added to the delayed or ordered lists here. | |
1907 | */ | |
1908 | static inline int transport_execute_task_attr(struct se_cmd *cmd) | |
1909 | { | |
5951146d | 1910 | if (cmd->se_dev->dev_task_attr_type != SAM_TASK_ATTR_EMULATED) |
c66ac9db NB |
1911 | return 1; |
1912 | /* | |
25985edc | 1913 | * Check for the existence of HEAD_OF_QUEUE, and if true return 1 |
c66ac9db NB |
1914 | * to allow the passed struct se_cmd list of tasks to the front of the list. |
1915 | */ | |
e66ecd50 | 1916 | if (cmd->sam_task_attr == MSG_HEAD_TAG) { |
6708bb27 | 1917 | pr_debug("Added HEAD_OF_QUEUE for CDB:" |
c66ac9db | 1918 | " 0x%02x, se_ordered_id: %u\n", |
6708bb27 | 1919 | cmd->t_task_cdb[0], |
c66ac9db NB |
1920 | cmd->se_ordered_id); |
1921 | return 1; | |
e66ecd50 | 1922 | } else if (cmd->sam_task_attr == MSG_ORDERED_TAG) { |
5951146d | 1923 | atomic_inc(&cmd->se_dev->dev_ordered_sync); |
c66ac9db NB |
1924 | smp_mb__after_atomic_inc(); |
1925 | ||
6708bb27 | 1926 | pr_debug("Added ORDERED for CDB: 0x%02x to ordered" |
c66ac9db | 1927 | " list, se_ordered_id: %u\n", |
a1d8b49a | 1928 | cmd->t_task_cdb[0], |
c66ac9db NB |
1929 | cmd->se_ordered_id); |
1930 | /* | |
1931 | * Add ORDERED command to tail of execution queue if | |
1932 | * no other older commands exist that need to be | |
1933 | * completed first. | |
1934 | */ | |
6708bb27 | 1935 | if (!atomic_read(&cmd->se_dev->simple_cmds)) |
c66ac9db NB |
1936 | return 1; |
1937 | } else { | |
1938 | /* | |
1939 | * For SIMPLE and UNTAGGED Task Attribute commands | |
1940 | */ | |
5951146d | 1941 | atomic_inc(&cmd->se_dev->simple_cmds); |
c66ac9db NB |
1942 | smp_mb__after_atomic_inc(); |
1943 | } | |
1944 | /* | |
1945 | * Otherwise if one or more outstanding ORDERED task attribute exist, | |
1946 | * add the dormant task(s) built for the passed struct se_cmd to the | |
1947 | * execution queue and become in Active state for this struct se_device. | |
1948 | */ | |
5951146d | 1949 | if (atomic_read(&cmd->se_dev->dev_ordered_sync) != 0) { |
c66ac9db NB |
1950 | /* |
1951 | * Otherwise, add cmd w/ tasks to delayed cmd queue that | |
25985edc | 1952 | * will be drained upon completion of HEAD_OF_QUEUE task. |
c66ac9db | 1953 | */ |
5951146d | 1954 | spin_lock(&cmd->se_dev->delayed_cmd_lock); |
c66ac9db | 1955 | cmd->se_cmd_flags |= SCF_DELAYED_CMD_FROM_SAM_ATTR; |
5951146d AG |
1956 | list_add_tail(&cmd->se_delayed_node, |
1957 | &cmd->se_dev->delayed_cmd_list); | |
1958 | spin_unlock(&cmd->se_dev->delayed_cmd_lock); | |
c66ac9db | 1959 | |
6708bb27 | 1960 | pr_debug("Added CDB: 0x%02x Task Attr: 0x%02x to" |
c66ac9db | 1961 | " delayed CMD list, se_ordered_id: %u\n", |
a1d8b49a | 1962 | cmd->t_task_cdb[0], cmd->sam_task_attr, |
c66ac9db NB |
1963 | cmd->se_ordered_id); |
1964 | /* | |
1965 | * Return zero to let transport_execute_tasks() know | |
1966 | * not to add the delayed tasks to the execution list. | |
1967 | */ | |
1968 | return 0; | |
1969 | } | |
1970 | /* | |
1971 | * Otherwise, no ORDERED task attributes exist.. | |
1972 | */ | |
1973 | return 1; | |
1974 | } | |
1975 | ||
1976 | /* | |
1977 | * Called from fabric module context in transport_generic_new_cmd() and | |
1978 | * transport_generic_process_write() | |
1979 | */ | |
d28d96dc | 1980 | static void transport_execute_tasks(struct se_cmd *cmd) |
c66ac9db NB |
1981 | { |
1982 | int add_tasks; | |
40be67f4 | 1983 | struct se_device *se_dev = cmd->se_dev; |
c66ac9db NB |
1984 | /* |
1985 | * Call transport_cmd_check_stop() to see if a fabric exception | |
25985edc | 1986 | * has occurred that prevents execution. |
c66ac9db | 1987 | */ |
6708bb27 | 1988 | if (!transport_cmd_check_stop(cmd, 0, TRANSPORT_PROCESSING)) { |
c66ac9db NB |
1989 | /* |
1990 | * Check for SAM Task Attribute emulation and HEAD_OF_QUEUE | |
1991 | * attribute for the tasks of the received struct se_cmd CDB | |
1992 | */ | |
1993 | add_tasks = transport_execute_task_attr(cmd); | |
d28d96dc JE |
1994 | if (add_tasks) { |
1995 | __transport_execute_tasks(se_dev, cmd); | |
1996 | return; | |
1997 | } | |
c66ac9db | 1998 | } |
4d2300cc | 1999 | __transport_execute_tasks(se_dev, NULL); |
c66ac9db NB |
2000 | } |
2001 | ||
4d2300cc | 2002 | static int __transport_execute_tasks(struct se_device *dev, struct se_cmd *new_cmd) |
c66ac9db NB |
2003 | { |
2004 | int error; | |
2005 | struct se_cmd *cmd = NULL; | |
c66ac9db NB |
2006 | unsigned long flags; |
2007 | ||
c66ac9db | 2008 | check_depth: |
e3d6f909 | 2009 | spin_lock_irq(&dev->execute_task_lock); |
4d2300cc | 2010 | if (new_cmd != NULL) |
cf572a96 | 2011 | __target_add_to_execute_list(new_cmd); |
4d2300cc | 2012 | |
cf572a96 | 2013 | if (list_empty(&dev->execute_list)) { |
e3d6f909 | 2014 | spin_unlock_irq(&dev->execute_task_lock); |
c66ac9db NB |
2015 | return 0; |
2016 | } | |
cf572a96 CH |
2017 | cmd = list_first_entry(&dev->execute_list, struct se_cmd, execute_list); |
2018 | __target_remove_from_execute_list(cmd); | |
e3d6f909 | 2019 | spin_unlock_irq(&dev->execute_task_lock); |
c66ac9db | 2020 | |
a1d8b49a | 2021 | spin_lock_irqsave(&cmd->t_state_lock, flags); |
cf572a96 | 2022 | cmd->transport_state |= CMD_T_BUSY; |
785fdf70 | 2023 | cmd->transport_state |= CMD_T_SENT; |
c66ac9db | 2024 | |
a1d8b49a | 2025 | spin_unlock_irqrestore(&cmd->t_state_lock, flags); |
c66ac9db | 2026 | |
6bb35e00 CH |
2027 | if (cmd->execute_cmd) |
2028 | error = cmd->execute_cmd(cmd); | |
5787cacd CH |
2029 | else { |
2030 | error = dev->transport->execute_cmd(cmd, cmd->t_data_sg, | |
2031 | cmd->t_data_nents, cmd->data_direction); | |
2032 | } | |
cf572a96 | 2033 | |
d29a5b6a | 2034 | if (error != 0) { |
d29a5b6a | 2035 | spin_lock_irqsave(&cmd->t_state_lock, flags); |
cf572a96 | 2036 | cmd->transport_state &= ~CMD_T_BUSY; |
7d680f3b | 2037 | cmd->transport_state &= ~CMD_T_SENT; |
d29a5b6a | 2038 | spin_unlock_irqrestore(&cmd->t_state_lock, flags); |
7d680f3b | 2039 | |
03e98c9e | 2040 | transport_generic_request_failure(cmd); |
c66ac9db NB |
2041 | } |
2042 | ||
4d2300cc | 2043 | new_cmd = NULL; |
c66ac9db NB |
2044 | goto check_depth; |
2045 | ||
2046 | return 0; | |
2047 | } | |
2048 | ||
c66ac9db NB |
2049 | static inline u32 transport_get_sectors_6( |
2050 | unsigned char *cdb, | |
2051 | struct se_cmd *cmd, | |
2052 | int *ret) | |
2053 | { | |
5951146d | 2054 | struct se_device *dev = cmd->se_dev; |
c66ac9db NB |
2055 | |
2056 | /* | |
2057 | * Assume TYPE_DISK for non struct se_device objects. | |
2058 | * Use 8-bit sector value. | |
2059 | */ | |
2060 | if (!dev) | |
2061 | goto type_disk; | |
2062 | ||
2063 | /* | |
2064 | * Use 24-bit allocation length for TYPE_TAPE. | |
2065 | */ | |
e3d6f909 | 2066 | if (dev->transport->get_device_type(dev) == TYPE_TAPE) |
c66ac9db NB |
2067 | return (u32)(cdb[2] << 16) + (cdb[3] << 8) + cdb[4]; |
2068 | ||
2069 | /* | |
2070 | * Everything else assume TYPE_DISK Sector CDB location. | |
9b5cd7f3 RD |
2071 | * Use 8-bit sector value. SBC-3 says: |
2072 | * | |
2073 | * A TRANSFER LENGTH field set to zero specifies that 256 | |
2074 | * logical blocks shall be written. Any other value | |
2075 | * specifies the number of logical blocks that shall be | |
2076 | * written. | |
c66ac9db NB |
2077 | */ |
2078 | type_disk: | |
9b5cd7f3 | 2079 | return cdb[4] ? : 256; |
c66ac9db NB |
2080 | } |
2081 | ||
2082 | static inline u32 transport_get_sectors_10( | |
2083 | unsigned char *cdb, | |
2084 | struct se_cmd *cmd, | |
2085 | int *ret) | |
2086 | { | |
5951146d | 2087 | struct se_device *dev = cmd->se_dev; |
c66ac9db NB |
2088 | |
2089 | /* | |
2090 | * Assume TYPE_DISK for non struct se_device objects. | |
2091 | * Use 16-bit sector value. | |
2092 | */ | |
2093 | if (!dev) | |
2094 | goto type_disk; | |
2095 | ||
2096 | /* | |
2097 | * XXX_10 is not defined in SSC, throw an exception | |
2098 | */ | |
e3d6f909 AG |
2099 | if (dev->transport->get_device_type(dev) == TYPE_TAPE) { |
2100 | *ret = -EINVAL; | |
c66ac9db NB |
2101 | return 0; |
2102 | } | |
2103 | ||
2104 | /* | |
2105 | * Everything else assume TYPE_DISK Sector CDB location. | |
2106 | * Use 16-bit sector value. | |
2107 | */ | |
2108 | type_disk: | |
2109 | return (u32)(cdb[7] << 8) + cdb[8]; | |
2110 | } | |
2111 | ||
2112 | static inline u32 transport_get_sectors_12( | |
2113 | unsigned char *cdb, | |
2114 | struct se_cmd *cmd, | |
2115 | int *ret) | |
2116 | { | |
5951146d | 2117 | struct se_device *dev = cmd->se_dev; |
c66ac9db NB |
2118 | |
2119 | /* | |
2120 | * Assume TYPE_DISK for non struct se_device objects. | |
2121 | * Use 32-bit sector value. | |
2122 | */ | |
2123 | if (!dev) | |
2124 | goto type_disk; | |
2125 | ||
2126 | /* | |
2127 | * XXX_12 is not defined in SSC, throw an exception | |
2128 | */ | |
e3d6f909 AG |
2129 | if (dev->transport->get_device_type(dev) == TYPE_TAPE) { |
2130 | *ret = -EINVAL; | |
c66ac9db NB |
2131 | return 0; |
2132 | } | |
2133 | ||
2134 | /* | |
2135 | * Everything else assume TYPE_DISK Sector CDB location. | |
2136 | * Use 32-bit sector value. | |
2137 | */ | |
2138 | type_disk: | |
2139 | return (u32)(cdb[6] << 24) + (cdb[7] << 16) + (cdb[8] << 8) + cdb[9]; | |
2140 | } | |
2141 | ||
2142 | static inline u32 transport_get_sectors_16( | |
2143 | unsigned char *cdb, | |
2144 | struct se_cmd *cmd, | |
2145 | int *ret) | |
2146 | { | |
5951146d | 2147 | struct se_device *dev = cmd->se_dev; |
c66ac9db NB |
2148 | |
2149 | /* | |
2150 | * Assume TYPE_DISK for non struct se_device objects. | |
2151 | * Use 32-bit sector value. | |
2152 | */ | |
2153 | if (!dev) | |
2154 | goto type_disk; | |
2155 | ||
2156 | /* | |
2157 | * Use 24-bit allocation length for TYPE_TAPE. | |
2158 | */ | |
e3d6f909 | 2159 | if (dev->transport->get_device_type(dev) == TYPE_TAPE) |
c66ac9db NB |
2160 | return (u32)(cdb[12] << 16) + (cdb[13] << 8) + cdb[14]; |
2161 | ||
2162 | type_disk: | |
2163 | return (u32)(cdb[10] << 24) + (cdb[11] << 16) + | |
2164 | (cdb[12] << 8) + cdb[13]; | |
2165 | } | |
2166 | ||
2167 | /* | |
2168 | * Used for VARIABLE_LENGTH_CDB WRITE_32 and READ_32 variants | |
2169 | */ | |
2170 | static inline u32 transport_get_sectors_32( | |
2171 | unsigned char *cdb, | |
2172 | struct se_cmd *cmd, | |
2173 | int *ret) | |
2174 | { | |
2175 | /* | |
2176 | * Assume TYPE_DISK for non struct se_device objects. | |
2177 | * Use 32-bit sector value. | |
2178 | */ | |
2179 | return (u32)(cdb[28] << 24) + (cdb[29] << 16) + | |
2180 | (cdb[30] << 8) + cdb[31]; | |
2181 | ||
2182 | } | |
2183 | ||
2184 | static inline u32 transport_get_size( | |
2185 | u32 sectors, | |
2186 | unsigned char *cdb, | |
2187 | struct se_cmd *cmd) | |
2188 | { | |
5951146d | 2189 | struct se_device *dev = cmd->se_dev; |
c66ac9db | 2190 | |
e3d6f909 | 2191 | if (dev->transport->get_device_type(dev) == TYPE_TAPE) { |
c66ac9db | 2192 | if (cdb[1] & 1) { /* sectors */ |
e3d6f909 | 2193 | return dev->se_sub_dev->se_dev_attrib.block_size * sectors; |
c66ac9db NB |
2194 | } else /* bytes */ |
2195 | return sectors; | |
2196 | } | |
8b1e1244 | 2197 | |
6708bb27 | 2198 | pr_debug("Returning block_size: %u, sectors: %u == %u for" |
8b1e1244 AG |
2199 | " %s object\n", dev->se_sub_dev->se_dev_attrib.block_size, |
2200 | sectors, dev->se_sub_dev->se_dev_attrib.block_size * sectors, | |
2201 | dev->transport->name); | |
2202 | ||
e3d6f909 | 2203 | return dev->se_sub_dev->se_dev_attrib.block_size * sectors; |
c66ac9db NB |
2204 | } |
2205 | ||
c66ac9db NB |
2206 | static void transport_xor_callback(struct se_cmd *cmd) |
2207 | { | |
2208 | unsigned char *buf, *addr; | |
ec98f782 | 2209 | struct scatterlist *sg; |
c66ac9db NB |
2210 | unsigned int offset; |
2211 | int i; | |
ec98f782 | 2212 | int count; |
c66ac9db NB |
2213 | /* |
2214 | * From sbc3r22.pdf section 5.48 XDWRITEREAD (10) command | |
2215 | * | |
2216 | * 1) read the specified logical block(s); | |
2217 | * 2) transfer logical blocks from the data-out buffer; | |
2218 | * 3) XOR the logical blocks transferred from the data-out buffer with | |
2219 | * the logical blocks read, storing the resulting XOR data in a buffer; | |
2220 | * 4) if the DISABLE WRITE bit is set to zero, then write the logical | |
2221 | * blocks transferred from the data-out buffer; and | |
2222 | * 5) transfer the resulting XOR data to the data-in buffer. | |
2223 | */ | |
2224 | buf = kmalloc(cmd->data_length, GFP_KERNEL); | |
6708bb27 AG |
2225 | if (!buf) { |
2226 | pr_err("Unable to allocate xor_callback buf\n"); | |
c66ac9db NB |
2227 | return; |
2228 | } | |
2229 | /* | |
ec98f782 | 2230 | * Copy the scatterlist WRITE buffer located at cmd->t_data_sg |
c66ac9db NB |
2231 | * into the locally allocated *buf |
2232 | */ | |
ec98f782 AG |
2233 | sg_copy_to_buffer(cmd->t_data_sg, |
2234 | cmd->t_data_nents, | |
2235 | buf, | |
2236 | cmd->data_length); | |
2237 | ||
c66ac9db NB |
2238 | /* |
2239 | * Now perform the XOR against the BIDI read memory located at | |
a1d8b49a | 2240 | * cmd->t_mem_bidi_list |
c66ac9db NB |
2241 | */ |
2242 | ||
2243 | offset = 0; | |
ec98f782 | 2244 | for_each_sg(cmd->t_bidi_data_sg, sg, cmd->t_bidi_data_nents, count) { |
ca747d61 | 2245 | addr = kmap_atomic(sg_page(sg)); |
ec98f782 | 2246 | if (!addr) |
c66ac9db NB |
2247 | goto out; |
2248 | ||
ec98f782 AG |
2249 | for (i = 0; i < sg->length; i++) |
2250 | *(addr + sg->offset + i) ^= *(buf + offset + i); | |
c66ac9db | 2251 | |
ec98f782 | 2252 | offset += sg->length; |
ca747d61 | 2253 | kunmap_atomic(addr); |
c66ac9db | 2254 | } |
ec98f782 | 2255 | |
c66ac9db NB |
2256 | out: |
2257 | kfree(buf); | |
2258 | } | |
2259 | ||
2260 | /* | |
2261 | * Used to obtain Sense Data from underlying Linux/SCSI struct scsi_cmnd | |
2262 | */ | |
2263 | static int transport_get_sense_data(struct se_cmd *cmd) | |
2264 | { | |
2265 | unsigned char *buffer = cmd->sense_buffer, *sense_buffer = NULL; | |
42bf829e | 2266 | struct se_device *dev = cmd->se_dev; |
c66ac9db NB |
2267 | unsigned long flags; |
2268 | u32 offset = 0; | |
2269 | ||
e3d6f909 AG |
2270 | WARN_ON(!cmd->se_lun); |
2271 | ||
42bf829e CH |
2272 | if (!dev) |
2273 | return 0; | |
2274 | ||
a1d8b49a | 2275 | spin_lock_irqsave(&cmd->t_state_lock, flags); |
c66ac9db | 2276 | if (cmd->se_cmd_flags & SCF_SENT_CHECK_CONDITION) { |
a1d8b49a | 2277 | spin_unlock_irqrestore(&cmd->t_state_lock, flags); |
c66ac9db NB |
2278 | return 0; |
2279 | } | |
2280 | ||
cf572a96 CH |
2281 | if (!(cmd->se_cmd_flags & SCF_TRANSPORT_TASK_SENSE)) |
2282 | goto out; | |
c66ac9db | 2283 | |
cf572a96 CH |
2284 | if (!dev->transport->get_sense_buffer) { |
2285 | pr_err("dev->transport->get_sense_buffer is NULL\n"); | |
2286 | goto out; | |
2287 | } | |
c66ac9db | 2288 | |
5787cacd | 2289 | sense_buffer = dev->transport->get_sense_buffer(cmd); |
cf572a96 | 2290 | if (!sense_buffer) { |
5787cacd | 2291 | pr_err("ITT 0x%08x cmd %p: Unable to locate" |
cf572a96 | 2292 | " sense buffer for task with sense\n", |
5787cacd | 2293 | cmd->se_tfo->get_task_tag(cmd), cmd); |
cf572a96 | 2294 | goto out; |
c66ac9db | 2295 | } |
5787cacd | 2296 | |
cf572a96 CH |
2297 | spin_unlock_irqrestore(&cmd->t_state_lock, flags); |
2298 | ||
2299 | offset = cmd->se_tfo->set_fabric_sense_len(cmd, TRANSPORT_SENSE_BUFFER); | |
2300 | ||
2301 | memcpy(&buffer[offset], sense_buffer, TRANSPORT_SENSE_BUFFER); | |
cf572a96 CH |
2302 | |
2303 | /* Automatically padded */ | |
2304 | cmd->scsi_sense_length = TRANSPORT_SENSE_BUFFER + offset; | |
2305 | ||
2306 | pr_debug("HBA_[%u]_PLUG[%s]: Set SAM STATUS: 0x%02x and sense\n", | |
2307 | dev->se_hba->hba_id, dev->transport->name, cmd->scsi_status); | |
2308 | return 0; | |
2309 | ||
785fdf70 | 2310 | out: |
a1d8b49a | 2311 | spin_unlock_irqrestore(&cmd->t_state_lock, flags); |
c66ac9db NB |
2312 | return -1; |
2313 | } | |
2314 | ||
ec98f782 AG |
2315 | static inline long long transport_dev_end_lba(struct se_device *dev) |
2316 | { | |
2317 | return dev->transport->get_blocks(dev) + 1; | |
2318 | } | |
2319 | ||
2320 | static int transport_cmd_get_valid_sectors(struct se_cmd *cmd) | |
2321 | { | |
2322 | struct se_device *dev = cmd->se_dev; | |
2323 | u32 sectors; | |
2324 | ||
2325 | if (dev->transport->get_device_type(dev) != TYPE_DISK) | |
2326 | return 0; | |
2327 | ||
2328 | sectors = (cmd->data_length / dev->se_sub_dev->se_dev_attrib.block_size); | |
2329 | ||
6708bb27 AG |
2330 | if ((cmd->t_task_lba + sectors) > transport_dev_end_lba(dev)) { |
2331 | pr_err("LBA: %llu Sectors: %u exceeds" | |
ec98f782 AG |
2332 | " transport_dev_end_lba(): %llu\n", |
2333 | cmd->t_task_lba, sectors, | |
2334 | transport_dev_end_lba(dev)); | |
7abbe7f3 | 2335 | return -EINVAL; |
ec98f782 AG |
2336 | } |
2337 | ||
7abbe7f3 | 2338 | return 0; |
ec98f782 AG |
2339 | } |
2340 | ||
706d5860 NB |
2341 | static int target_check_write_same_discard(unsigned char *flags, struct se_device *dev) |
2342 | { | |
2343 | /* | |
2344 | * Determine if the received WRITE_SAME is used to for direct | |
2345 | * passthrough into Linux/SCSI with struct request via TCM/pSCSI | |
2346 | * or we are signaling the use of internal WRITE_SAME + UNMAP=1 | |
2347 | * emulation for -> Linux/BLOCK disbard with TCM/IBLOCK code. | |
2348 | */ | |
2349 | int passthrough = (dev->transport->transport_type == | |
2350 | TRANSPORT_PLUGIN_PHBA_PDEV); | |
2351 | ||
2352 | if (!passthrough) { | |
2353 | if ((flags[0] & 0x04) || (flags[0] & 0x02)) { | |
2354 | pr_err("WRITE_SAME PBDATA and LBDATA" | |
2355 | " bits not supported for Block Discard" | |
2356 | " Emulation\n"); | |
2357 | return -ENOSYS; | |
2358 | } | |
2359 | /* | |
2360 | * Currently for the emulated case we only accept | |
2361 | * tpws with the UNMAP=1 bit set. | |
2362 | */ | |
2363 | if (!(flags[0] & 0x08)) { | |
2364 | pr_err("WRITE_SAME w/o UNMAP bit not" | |
2365 | " supported for Block Discard Emulation\n"); | |
2366 | return -ENOSYS; | |
2367 | } | |
2368 | } | |
2369 | ||
2370 | return 0; | |
2371 | } | |
2372 | ||
c66ac9db NB |
2373 | /* transport_generic_cmd_sequencer(): |
2374 | * | |
2375 | * Generic Command Sequencer that should work for most DAS transport | |
2376 | * drivers. | |
2377 | * | |
a12f41f8 | 2378 | * Called from target_setup_cmd_from_cdb() in the $FABRIC_MOD |
c66ac9db NB |
2379 | * RX Thread. |
2380 | * | |
2381 | * FIXME: Need to support other SCSI OPCODES where as well. | |
2382 | */ | |
2383 | static int transport_generic_cmd_sequencer( | |
2384 | struct se_cmd *cmd, | |
2385 | unsigned char *cdb) | |
2386 | { | |
5951146d | 2387 | struct se_device *dev = cmd->se_dev; |
c66ac9db NB |
2388 | struct se_subsystem_dev *su_dev = dev->se_sub_dev; |
2389 | int ret = 0, sector_ret = 0, passthrough; | |
2390 | u32 sectors = 0, size = 0, pr_reg_type = 0; | |
2391 | u16 service_action; | |
2392 | u8 alua_ascq = 0; | |
2393 | /* | |
2394 | * Check for an existing UNIT ATTENTION condition | |
2395 | */ | |
2396 | if (core_scsi3_ua_check(cmd, cdb) < 0) { | |
c66ac9db NB |
2397 | cmd->se_cmd_flags |= SCF_SCSI_CDB_EXCEPTION; |
2398 | cmd->scsi_sense_reason = TCM_CHECK_CONDITION_UNIT_ATTENTION; | |
5951146d | 2399 | return -EINVAL; |
c66ac9db NB |
2400 | } |
2401 | /* | |
2402 | * Check status of Asymmetric Logical Unit Assignment port | |
2403 | */ | |
e3d6f909 | 2404 | ret = su_dev->t10_alua.alua_state_check(cmd, cdb, &alua_ascq); |
c66ac9db | 2405 | if (ret != 0) { |
c66ac9db | 2406 | /* |
25985edc | 2407 | * Set SCSI additional sense code (ASC) to 'LUN Not Accessible'; |
c66ac9db NB |
2408 | * The ALUA additional sense code qualifier (ASCQ) is determined |
2409 | * by the ALUA primary or secondary access state.. | |
2410 | */ | |
2411 | if (ret > 0) { | |
6708bb27 | 2412 | pr_debug("[%s]: ALUA TG Port not available," |
c66ac9db | 2413 | " SenseKey: NOT_READY, ASC/ASCQ: 0x04/0x%02x\n", |
e3d6f909 | 2414 | cmd->se_tfo->get_fabric_name(), alua_ascq); |
8b1e1244 | 2415 | |
c66ac9db NB |
2416 | transport_set_sense_codes(cmd, 0x04, alua_ascq); |
2417 | cmd->se_cmd_flags |= SCF_SCSI_CDB_EXCEPTION; | |
2418 | cmd->scsi_sense_reason = TCM_CHECK_CONDITION_NOT_READY; | |
5951146d | 2419 | return -EINVAL; |
c66ac9db NB |
2420 | } |
2421 | goto out_invalid_cdb_field; | |
2422 | } | |
2423 | /* | |
2424 | * Check status for SPC-3 Persistent Reservations | |
2425 | */ | |
e3d6f909 AG |
2426 | if (su_dev->t10_pr.pr_ops.t10_reservation_check(cmd, &pr_reg_type) != 0) { |
2427 | if (su_dev->t10_pr.pr_ops.t10_seq_non_holder( | |
03e98c9e NB |
2428 | cmd, cdb, pr_reg_type) != 0) { |
2429 | cmd->se_cmd_flags |= SCF_SCSI_CDB_EXCEPTION; | |
2430 | cmd->se_cmd_flags |= SCF_SCSI_RESERVATION_CONFLICT; | |
087a03b3 | 2431 | cmd->scsi_status = SAM_STAT_RESERVATION_CONFLICT; |
03e98c9e NB |
2432 | cmd->scsi_sense_reason = TCM_RESERVATION_CONFLICT; |
2433 | return -EBUSY; | |
2434 | } | |
c66ac9db NB |
2435 | /* |
2436 | * This means the CDB is allowed for the SCSI Initiator port | |
2437 | * when said port is *NOT* holding the legacy SPC-2 or | |
2438 | * SPC-3 Persistent Reservation. | |
2439 | */ | |
2440 | } | |
2441 | ||
5bda90c8 CH |
2442 | /* |
2443 | * If we operate in passthrough mode we skip most CDB emulation and | |
2444 | * instead hand the commands down to the physical SCSI device. | |
2445 | */ | |
2446 | passthrough = | |
2447 | (dev->transport->transport_type == TRANSPORT_PLUGIN_PHBA_PDEV); | |
2448 | ||
c66ac9db NB |
2449 | switch (cdb[0]) { |
2450 | case READ_6: | |
2451 | sectors = transport_get_sectors_6(cdb, cmd, §or_ret); | |
2452 | if (sector_ret) | |
2453 | goto out_unsupported_cdb; | |
2454 | size = transport_get_size(sectors, cdb, cmd); | |
a1d8b49a | 2455 | cmd->t_task_lba = transport_lba_21(cdb); |
c66ac9db NB |
2456 | cmd->se_cmd_flags |= SCF_SCSI_DATA_SG_IO_CDB; |
2457 | break; | |
2458 | case READ_10: | |
2459 | sectors = transport_get_sectors_10(cdb, cmd, §or_ret); | |
2460 | if (sector_ret) | |
2461 | goto out_unsupported_cdb; | |
2462 | size = transport_get_size(sectors, cdb, cmd); | |
a1d8b49a | 2463 | cmd->t_task_lba = transport_lba_32(cdb); |
c66ac9db NB |
2464 | cmd->se_cmd_flags |= SCF_SCSI_DATA_SG_IO_CDB; |
2465 | break; | |
2466 | case READ_12: | |
2467 | sectors = transport_get_sectors_12(cdb, cmd, §or_ret); | |
2468 | if (sector_ret) | |
2469 | goto out_unsupported_cdb; | |
2470 | size = transport_get_size(sectors, cdb, cmd); | |
a1d8b49a | 2471 | cmd->t_task_lba = transport_lba_32(cdb); |
c66ac9db NB |
2472 | cmd->se_cmd_flags |= SCF_SCSI_DATA_SG_IO_CDB; |
2473 | break; | |
2474 | case READ_16: | |
2475 | sectors = transport_get_sectors_16(cdb, cmd, §or_ret); | |
2476 | if (sector_ret) | |
2477 | goto out_unsupported_cdb; | |
2478 | size = transport_get_size(sectors, cdb, cmd); | |
a1d8b49a | 2479 | cmd->t_task_lba = transport_lba_64(cdb); |
c66ac9db NB |
2480 | cmd->se_cmd_flags |= SCF_SCSI_DATA_SG_IO_CDB; |
2481 | break; | |
2482 | case WRITE_6: | |
2483 | sectors = transport_get_sectors_6(cdb, cmd, §or_ret); | |
2484 | if (sector_ret) | |
2485 | goto out_unsupported_cdb; | |
2486 | size = transport_get_size(sectors, cdb, cmd); | |
a1d8b49a | 2487 | cmd->t_task_lba = transport_lba_21(cdb); |
c66ac9db NB |
2488 | cmd->se_cmd_flags |= SCF_SCSI_DATA_SG_IO_CDB; |
2489 | break; | |
2490 | case WRITE_10: | |
66246617 | 2491 | case WRITE_VERIFY: |
c66ac9db NB |
2492 | sectors = transport_get_sectors_10(cdb, cmd, §or_ret); |
2493 | if (sector_ret) | |
2494 | goto out_unsupported_cdb; | |
2495 | size = transport_get_size(sectors, cdb, cmd); | |
a1d8b49a | 2496 | cmd->t_task_lba = transport_lba_32(cdb); |
2d3a4b51 CH |
2497 | if (cdb[1] & 0x8) |
2498 | cmd->se_cmd_flags |= SCF_FUA; | |
c66ac9db NB |
2499 | cmd->se_cmd_flags |= SCF_SCSI_DATA_SG_IO_CDB; |
2500 | break; | |
2501 | case WRITE_12: | |
2502 | sectors = transport_get_sectors_12(cdb, cmd, §or_ret); | |
2503 | if (sector_ret) | |
2504 | goto out_unsupported_cdb; | |
2505 | size = transport_get_size(sectors, cdb, cmd); | |
a1d8b49a | 2506 | cmd->t_task_lba = transport_lba_32(cdb); |
2d3a4b51 CH |
2507 | if (cdb[1] & 0x8) |
2508 | cmd->se_cmd_flags |= SCF_FUA; | |
c66ac9db NB |
2509 | cmd->se_cmd_flags |= SCF_SCSI_DATA_SG_IO_CDB; |
2510 | break; | |
2511 | case WRITE_16: | |
2512 | sectors = transport_get_sectors_16(cdb, cmd, §or_ret); | |
2513 | if (sector_ret) | |
2514 | goto out_unsupported_cdb; | |
2515 | size = transport_get_size(sectors, cdb, cmd); | |
a1d8b49a | 2516 | cmd->t_task_lba = transport_lba_64(cdb); |
2d3a4b51 CH |
2517 | if (cdb[1] & 0x8) |
2518 | cmd->se_cmd_flags |= SCF_FUA; | |
c66ac9db NB |
2519 | cmd->se_cmd_flags |= SCF_SCSI_DATA_SG_IO_CDB; |
2520 | break; | |
2521 | case XDWRITEREAD_10: | |
2522 | if ((cmd->data_direction != DMA_TO_DEVICE) || | |
33c3fafc | 2523 | !(cmd->se_cmd_flags & SCF_BIDI)) |
c66ac9db NB |
2524 | goto out_invalid_cdb_field; |
2525 | sectors = transport_get_sectors_10(cdb, cmd, §or_ret); | |
2526 | if (sector_ret) | |
2527 | goto out_unsupported_cdb; | |
2528 | size = transport_get_size(sectors, cdb, cmd); | |
a1d8b49a | 2529 | cmd->t_task_lba = transport_lba_32(cdb); |
c66ac9db | 2530 | cmd->se_cmd_flags |= SCF_SCSI_DATA_SG_IO_CDB; |
7c1c6af3 | 2531 | |
5bda90c8 CH |
2532 | /* |
2533 | * Do now allow BIDI commands for passthrough mode. | |
2534 | */ | |
2535 | if (passthrough) | |
7c1c6af3 | 2536 | goto out_unsupported_cdb; |
5bda90c8 | 2537 | |
c66ac9db | 2538 | /* |
35e0e757 | 2539 | * Setup BIDI XOR callback to be run after I/O completion. |
c66ac9db NB |
2540 | */ |
2541 | cmd->transport_complete_callback = &transport_xor_callback; | |
2d3a4b51 CH |
2542 | if (cdb[1] & 0x8) |
2543 | cmd->se_cmd_flags |= SCF_FUA; | |
c66ac9db NB |
2544 | break; |
2545 | case VARIABLE_LENGTH_CMD: | |
2546 | service_action = get_unaligned_be16(&cdb[8]); | |
c66ac9db NB |
2547 | switch (service_action) { |
2548 | case XDWRITEREAD_32: | |
2549 | sectors = transport_get_sectors_32(cdb, cmd, §or_ret); | |
2550 | if (sector_ret) | |
2551 | goto out_unsupported_cdb; | |
2552 | size = transport_get_size(sectors, cdb, cmd); | |
2553 | /* | |
2554 | * Use WRITE_32 and READ_32 opcodes for the emulated | |
2555 | * XDWRITE_READ_32 logic. | |
2556 | */ | |
a1d8b49a | 2557 | cmd->t_task_lba = transport_lba_64_ext(cdb); |
c66ac9db NB |
2558 | cmd->se_cmd_flags |= SCF_SCSI_DATA_SG_IO_CDB; |
2559 | ||
5bda90c8 CH |
2560 | /* |
2561 | * Do now allow BIDI commands for passthrough mode. | |
2562 | */ | |
c66ac9db | 2563 | if (passthrough) |
7c1c6af3 | 2564 | goto out_unsupported_cdb; |
5bda90c8 | 2565 | |
c66ac9db | 2566 | /* |
35e0e757 CH |
2567 | * Setup BIDI XOR callback to be run during after I/O |
2568 | * completion. | |
c66ac9db NB |
2569 | */ |
2570 | cmd->transport_complete_callback = &transport_xor_callback; | |
2d3a4b51 CH |
2571 | if (cdb[1] & 0x8) |
2572 | cmd->se_cmd_flags |= SCF_FUA; | |
c66ac9db NB |
2573 | break; |
2574 | case WRITE_SAME_32: | |
2575 | sectors = transport_get_sectors_32(cdb, cmd, §or_ret); | |
2576 | if (sector_ret) | |
2577 | goto out_unsupported_cdb; | |
dd3a5ad8 | 2578 | |
6708bb27 | 2579 | if (sectors) |
12850626 | 2580 | size = transport_get_size(1, cdb, cmd); |
6708bb27 AG |
2581 | else { |
2582 | pr_err("WSNZ=1, WRITE_SAME w/sectors=0 not" | |
2583 | " supported\n"); | |
2584 | goto out_invalid_cdb_field; | |
2585 | } | |
dd3a5ad8 | 2586 | |
a1d8b49a | 2587 | cmd->t_task_lba = get_unaligned_be64(&cdb[12]); |
c66ac9db NB |
2588 | cmd->se_cmd_flags |= SCF_SCSI_CONTROL_SG_IO_CDB; |
2589 | ||
706d5860 | 2590 | if (target_check_write_same_discard(&cdb[10], dev) < 0) |
67236c44 | 2591 | goto out_unsupported_cdb; |
5bda90c8 | 2592 | if (!passthrough) |
6bb35e00 | 2593 | cmd->execute_cmd = target_emulate_write_same; |
c66ac9db NB |
2594 | break; |
2595 | default: | |
6708bb27 | 2596 | pr_err("VARIABLE_LENGTH_CMD service action" |
c66ac9db NB |
2597 | " 0x%04x not supported\n", service_action); |
2598 | goto out_unsupported_cdb; | |
2599 | } | |
2600 | break; | |
e434f1f1 | 2601 | case MAINTENANCE_IN: |
e3d6f909 | 2602 | if (dev->transport->get_device_type(dev) != TYPE_ROM) { |
c66ac9db NB |
2603 | /* MAINTENANCE_IN from SCC-2 */ |
2604 | /* | |
2605 | * Check for emulated MI_REPORT_TARGET_PGS. | |
2606 | */ | |
ba539743 | 2607 | if ((cdb[1] & 0x1f) == MI_REPORT_TARGET_PGS && |
e76a35d6 | 2608 | su_dev->t10_alua.alua_type == SPC3_ALUA_EMULATED) { |
6bb35e00 | 2609 | cmd->execute_cmd = |
e76a35d6 | 2610 | target_emulate_report_target_port_groups; |
c66ac9db NB |
2611 | } |
2612 | size = (cdb[6] << 24) | (cdb[7] << 16) | | |
2613 | (cdb[8] << 8) | cdb[9]; | |
2614 | } else { | |
2615 | /* GPCMD_SEND_KEY from multi media commands */ | |
2616 | size = (cdb[8] << 8) + cdb[9]; | |
2617 | } | |
05d1c7c0 | 2618 | cmd->se_cmd_flags |= SCF_SCSI_CONTROL_SG_IO_CDB; |
c66ac9db NB |
2619 | break; |
2620 | case MODE_SELECT: | |
2621 | size = cdb[4]; | |
2622 | cmd->se_cmd_flags |= SCF_SCSI_CONTROL_SG_IO_CDB; | |
2623 | break; | |
2624 | case MODE_SELECT_10: | |
2625 | size = (cdb[7] << 8) + cdb[8]; | |
2626 | cmd->se_cmd_flags |= SCF_SCSI_CONTROL_SG_IO_CDB; | |
2627 | break; | |
2628 | case MODE_SENSE: | |
2629 | size = cdb[4]; | |
05d1c7c0 | 2630 | cmd->se_cmd_flags |= SCF_SCSI_CONTROL_SG_IO_CDB; |
5bda90c8 | 2631 | if (!passthrough) |
6bb35e00 | 2632 | cmd->execute_cmd = target_emulate_modesense; |
c66ac9db NB |
2633 | break; |
2634 | case MODE_SENSE_10: | |
5bda90c8 CH |
2635 | size = (cdb[7] << 8) + cdb[8]; |
2636 | cmd->se_cmd_flags |= SCF_SCSI_CONTROL_SG_IO_CDB; | |
2637 | if (!passthrough) | |
6bb35e00 | 2638 | cmd->execute_cmd = target_emulate_modesense; |
5bda90c8 | 2639 | break; |
c66ac9db NB |
2640 | case GPCMD_READ_BUFFER_CAPACITY: |
2641 | case GPCMD_SEND_OPC: | |
2642 | case LOG_SELECT: | |
2643 | case LOG_SENSE: | |
2644 | size = (cdb[7] << 8) + cdb[8]; | |
05d1c7c0 | 2645 | cmd->se_cmd_flags |= SCF_SCSI_CONTROL_SG_IO_CDB; |
c66ac9db NB |
2646 | break; |
2647 | case READ_BLOCK_LIMITS: | |
2648 | size = READ_BLOCK_LEN; | |
05d1c7c0 | 2649 | cmd->se_cmd_flags |= SCF_SCSI_CONTROL_SG_IO_CDB; |
c66ac9db NB |
2650 | break; |
2651 | case GPCMD_GET_CONFIGURATION: | |
2652 | case GPCMD_READ_FORMAT_CAPACITIES: | |
2653 | case GPCMD_READ_DISC_INFO: | |
2654 | case GPCMD_READ_TRACK_RZONE_INFO: | |
2655 | size = (cdb[7] << 8) + cdb[8]; | |
2656 | cmd->se_cmd_flags |= SCF_SCSI_CONTROL_SG_IO_CDB; | |
2657 | break; | |
2658 | case PERSISTENT_RESERVE_IN: | |
617c0e06 | 2659 | if (su_dev->t10_pr.res_type == SPC3_PERSISTENT_RESERVATIONS) |
6bb35e00 | 2660 | cmd->execute_cmd = target_scsi3_emulate_pr_in; |
617c0e06 CH |
2661 | size = (cdb[7] << 8) + cdb[8]; |
2662 | cmd->se_cmd_flags |= SCF_SCSI_CONTROL_SG_IO_CDB; | |
2663 | break; | |
c66ac9db | 2664 | case PERSISTENT_RESERVE_OUT: |
617c0e06 | 2665 | if (su_dev->t10_pr.res_type == SPC3_PERSISTENT_RESERVATIONS) |
6bb35e00 | 2666 | cmd->execute_cmd = target_scsi3_emulate_pr_out; |
c66ac9db | 2667 | size = (cdb[7] << 8) + cdb[8]; |
05d1c7c0 | 2668 | cmd->se_cmd_flags |= SCF_SCSI_CONTROL_SG_IO_CDB; |
c66ac9db NB |
2669 | break; |
2670 | case GPCMD_MECHANISM_STATUS: | |
2671 | case GPCMD_READ_DVD_STRUCTURE: | |
2672 | size = (cdb[8] << 8) + cdb[9]; | |
2673 | cmd->se_cmd_flags |= SCF_SCSI_CONTROL_SG_IO_CDB; | |
2674 | break; | |
2675 | case READ_POSITION: | |
2676 | size = READ_POSITION_LEN; | |
05d1c7c0 | 2677 | cmd->se_cmd_flags |= SCF_SCSI_CONTROL_SG_IO_CDB; |
c66ac9db | 2678 | break; |
e434f1f1 | 2679 | case MAINTENANCE_OUT: |
e3d6f909 | 2680 | if (dev->transport->get_device_type(dev) != TYPE_ROM) { |
c66ac9db NB |
2681 | /* MAINTENANCE_OUT from SCC-2 |
2682 | * | |
2683 | * Check for emulated MO_SET_TARGET_PGS. | |
2684 | */ | |
e76a35d6 CH |
2685 | if (cdb[1] == MO_SET_TARGET_PGS && |
2686 | su_dev->t10_alua.alua_type == SPC3_ALUA_EMULATED) { | |
6bb35e00 | 2687 | cmd->execute_cmd = |
e76a35d6 | 2688 | target_emulate_set_target_port_groups; |
c66ac9db NB |
2689 | } |
2690 | ||
2691 | size = (cdb[6] << 24) | (cdb[7] << 16) | | |
2692 | (cdb[8] << 8) | cdb[9]; | |
2693 | } else { | |
2694 | /* GPCMD_REPORT_KEY from multi media commands */ | |
2695 | size = (cdb[8] << 8) + cdb[9]; | |
2696 | } | |
05d1c7c0 | 2697 | cmd->se_cmd_flags |= SCF_SCSI_CONTROL_SG_IO_CDB; |
c66ac9db NB |
2698 | break; |
2699 | case INQUIRY: | |
2700 | size = (cdb[3] << 8) + cdb[4]; | |
2701 | /* | |
2702 | * Do implict HEAD_OF_QUEUE processing for INQUIRY. | |
2703 | * See spc4r17 section 5.3 | |
2704 | */ | |
5951146d | 2705 | if (cmd->se_dev->dev_task_attr_type == SAM_TASK_ATTR_EMULATED) |
e66ecd50 | 2706 | cmd->sam_task_attr = MSG_HEAD_TAG; |
05d1c7c0 | 2707 | cmd->se_cmd_flags |= SCF_SCSI_CONTROL_SG_IO_CDB; |
5bda90c8 | 2708 | if (!passthrough) |
6bb35e00 | 2709 | cmd->execute_cmd = target_emulate_inquiry; |
c66ac9db NB |
2710 | break; |
2711 | case READ_BUFFER: | |
2712 | size = (cdb[6] << 16) + (cdb[7] << 8) + cdb[8]; | |
05d1c7c0 | 2713 | cmd->se_cmd_flags |= SCF_SCSI_CONTROL_SG_IO_CDB; |
c66ac9db NB |
2714 | break; |
2715 | case READ_CAPACITY: | |
2716 | size = READ_CAP_LEN; | |
05d1c7c0 | 2717 | cmd->se_cmd_flags |= SCF_SCSI_CONTROL_SG_IO_CDB; |
5bda90c8 | 2718 | if (!passthrough) |
6bb35e00 | 2719 | cmd->execute_cmd = target_emulate_readcapacity; |
c66ac9db NB |
2720 | break; |
2721 | case READ_MEDIA_SERIAL_NUMBER: | |
2722 | case SECURITY_PROTOCOL_IN: | |
2723 | case SECURITY_PROTOCOL_OUT: | |
2724 | size = (cdb[6] << 24) | (cdb[7] << 16) | (cdb[8] << 8) | cdb[9]; | |
05d1c7c0 | 2725 | cmd->se_cmd_flags |= SCF_SCSI_CONTROL_SG_IO_CDB; |
c66ac9db NB |
2726 | break; |
2727 | case SERVICE_ACTION_IN: | |
5bda90c8 CH |
2728 | switch (cmd->t_task_cdb[1] & 0x1f) { |
2729 | case SAI_READ_CAPACITY_16: | |
2730 | if (!passthrough) | |
6bb35e00 | 2731 | cmd->execute_cmd = |
5bda90c8 CH |
2732 | target_emulate_readcapacity_16; |
2733 | break; | |
2734 | default: | |
2735 | if (passthrough) | |
2736 | break; | |
2737 | ||
2738 | pr_err("Unsupported SA: 0x%02x\n", | |
2739 | cmd->t_task_cdb[1] & 0x1f); | |
b168fe8c | 2740 | goto out_invalid_cdb_field; |
5bda90c8 CH |
2741 | } |
2742 | /*FALLTHROUGH*/ | |
c66ac9db NB |
2743 | case ACCESS_CONTROL_IN: |
2744 | case ACCESS_CONTROL_OUT: | |
2745 | case EXTENDED_COPY: | |
2746 | case READ_ATTRIBUTE: | |
2747 | case RECEIVE_COPY_RESULTS: | |
2748 | case WRITE_ATTRIBUTE: | |
2749 | size = (cdb[10] << 24) | (cdb[11] << 16) | | |
2750 | (cdb[12] << 8) | cdb[13]; | |
05d1c7c0 | 2751 | cmd->se_cmd_flags |= SCF_SCSI_CONTROL_SG_IO_CDB; |
c66ac9db NB |
2752 | break; |
2753 | case RECEIVE_DIAGNOSTIC: | |
2754 | case SEND_DIAGNOSTIC: | |
2755 | size = (cdb[3] << 8) | cdb[4]; | |
05d1c7c0 | 2756 | cmd->se_cmd_flags |= SCF_SCSI_CONTROL_SG_IO_CDB; |
c66ac9db NB |
2757 | break; |
2758 | /* #warning FIXME: Figure out correct GPCMD_READ_CD blocksize. */ | |
2759 | #if 0 | |
2760 | case GPCMD_READ_CD: | |
2761 | sectors = (cdb[6] << 16) + (cdb[7] << 8) + cdb[8]; | |
2762 | size = (2336 * sectors); | |
05d1c7c0 | 2763 | cmd->se_cmd_flags |= SCF_SCSI_CONTROL_SG_IO_CDB; |
c66ac9db NB |
2764 | break; |
2765 | #endif | |
2766 | case READ_TOC: | |
2767 | size = cdb[8]; | |
05d1c7c0 | 2768 | cmd->se_cmd_flags |= SCF_SCSI_CONTROL_SG_IO_CDB; |
c66ac9db NB |
2769 | break; |
2770 | case REQUEST_SENSE: | |
2771 | size = cdb[4]; | |
05d1c7c0 | 2772 | cmd->se_cmd_flags |= SCF_SCSI_CONTROL_SG_IO_CDB; |
5bda90c8 | 2773 | if (!passthrough) |
6bb35e00 | 2774 | cmd->execute_cmd = target_emulate_request_sense; |
c66ac9db NB |
2775 | break; |
2776 | case READ_ELEMENT_STATUS: | |
2777 | size = 65536 * cdb[7] + 256 * cdb[8] + cdb[9]; | |
05d1c7c0 | 2778 | cmd->se_cmd_flags |= SCF_SCSI_CONTROL_SG_IO_CDB; |
c66ac9db NB |
2779 | break; |
2780 | case WRITE_BUFFER: | |
2781 | size = (cdb[6] << 16) + (cdb[7] << 8) + cdb[8]; | |
05d1c7c0 | 2782 | cmd->se_cmd_flags |= SCF_SCSI_CONTROL_SG_IO_CDB; |
c66ac9db NB |
2783 | break; |
2784 | case RESERVE: | |
2785 | case RESERVE_10: | |
2786 | /* | |
2787 | * The SPC-2 RESERVE does not contain a size in the SCSI CDB. | |
2788 | * Assume the passthrough or $FABRIC_MOD will tell us about it. | |
2789 | */ | |
2790 | if (cdb[0] == RESERVE_10) | |
2791 | size = (cdb[7] << 8) | cdb[8]; | |
2792 | else | |
2793 | size = cmd->data_length; | |
2794 | ||
2795 | /* | |
2796 | * Setup the legacy emulated handler for SPC-2 and | |
2797 | * >= SPC-3 compatible reservation handling (CRH=1) | |
2798 | * Otherwise, we assume the underlying SCSI logic is | |
2799 | * is running in SPC_PASSTHROUGH, and wants reservations | |
2800 | * emulation disabled. | |
2801 | */ | |
e76a35d6 | 2802 | if (su_dev->t10_pr.res_type != SPC_PASSTHROUGH) |
6bb35e00 | 2803 | cmd->execute_cmd = target_scsi2_reservation_reserve; |
c66ac9db NB |
2804 | cmd->se_cmd_flags |= SCF_SCSI_NON_DATA_CDB; |
2805 | break; | |
2806 | case RELEASE: | |
2807 | case RELEASE_10: | |
2808 | /* | |
2809 | * The SPC-2 RELEASE does not contain a size in the SCSI CDB. | |
2810 | * Assume the passthrough or $FABRIC_MOD will tell us about it. | |
2811 | */ | |
2812 | if (cdb[0] == RELEASE_10) | |
2813 | size = (cdb[7] << 8) | cdb[8]; | |
2814 | else | |
2815 | size = cmd->data_length; | |
2816 | ||
e76a35d6 | 2817 | if (su_dev->t10_pr.res_type != SPC_PASSTHROUGH) |
6bb35e00 | 2818 | cmd->execute_cmd = target_scsi2_reservation_release; |
c66ac9db NB |
2819 | cmd->se_cmd_flags |= SCF_SCSI_NON_DATA_CDB; |
2820 | break; | |
2821 | case SYNCHRONIZE_CACHE: | |
8e94b8db | 2822 | case SYNCHRONIZE_CACHE_16: |
c66ac9db NB |
2823 | /* |
2824 | * Extract LBA and range to be flushed for emulated SYNCHRONIZE_CACHE | |
2825 | */ | |
2826 | if (cdb[0] == SYNCHRONIZE_CACHE) { | |
2827 | sectors = transport_get_sectors_10(cdb, cmd, §or_ret); | |
a1d8b49a | 2828 | cmd->t_task_lba = transport_lba_32(cdb); |
c66ac9db NB |
2829 | } else { |
2830 | sectors = transport_get_sectors_16(cdb, cmd, §or_ret); | |
a1d8b49a | 2831 | cmd->t_task_lba = transport_lba_64(cdb); |
c66ac9db NB |
2832 | } |
2833 | if (sector_ret) | |
2834 | goto out_unsupported_cdb; | |
2835 | ||
2836 | size = transport_get_size(sectors, cdb, cmd); | |
2837 | cmd->se_cmd_flags |= SCF_SCSI_NON_DATA_CDB; | |
2838 | ||
5bda90c8 | 2839 | if (passthrough) |
c66ac9db | 2840 | break; |
5bda90c8 | 2841 | |
c66ac9db NB |
2842 | /* |
2843 | * Check to ensure that LBA + Range does not exceed past end of | |
7abbe7f3 | 2844 | * device for IBLOCK and FILEIO ->do_sync_cache() backend calls |
c66ac9db | 2845 | */ |
7abbe7f3 NB |
2846 | if ((cmd->t_task_lba != 0) || (sectors != 0)) { |
2847 | if (transport_cmd_get_valid_sectors(cmd) < 0) | |
2848 | goto out_invalid_cdb_field; | |
2849 | } | |
6bb35e00 | 2850 | cmd->execute_cmd = target_emulate_synchronize_cache; |
c66ac9db NB |
2851 | break; |
2852 | case UNMAP: | |
2853 | size = get_unaligned_be16(&cdb[7]); | |
05d1c7c0 | 2854 | cmd->se_cmd_flags |= SCF_SCSI_CONTROL_SG_IO_CDB; |
5bda90c8 | 2855 | if (!passthrough) |
6bb35e00 | 2856 | cmd->execute_cmd = target_emulate_unmap; |
c66ac9db NB |
2857 | break; |
2858 | case WRITE_SAME_16: | |
2859 | sectors = transport_get_sectors_16(cdb, cmd, §or_ret); | |
2860 | if (sector_ret) | |
2861 | goto out_unsupported_cdb; | |
dd3a5ad8 | 2862 | |
6708bb27 | 2863 | if (sectors) |
12850626 | 2864 | size = transport_get_size(1, cdb, cmd); |
6708bb27 AG |
2865 | else { |
2866 | pr_err("WSNZ=1, WRITE_SAME w/sectors=0 not supported\n"); | |
2867 | goto out_invalid_cdb_field; | |
2868 | } | |
dd3a5ad8 | 2869 | |
5db0753b | 2870 | cmd->t_task_lba = get_unaligned_be64(&cdb[2]); |
706d5860 NB |
2871 | cmd->se_cmd_flags |= SCF_SCSI_CONTROL_SG_IO_CDB; |
2872 | ||
2873 | if (target_check_write_same_discard(&cdb[1], dev) < 0) | |
67236c44 | 2874 | goto out_unsupported_cdb; |
5bda90c8 | 2875 | if (!passthrough) |
6bb35e00 | 2876 | cmd->execute_cmd = target_emulate_write_same; |
706d5860 NB |
2877 | break; |
2878 | case WRITE_SAME: | |
2879 | sectors = transport_get_sectors_10(cdb, cmd, §or_ret); | |
2880 | if (sector_ret) | |
2881 | goto out_unsupported_cdb; | |
2882 | ||
2883 | if (sectors) | |
12850626 | 2884 | size = transport_get_size(1, cdb, cmd); |
706d5860 NB |
2885 | else { |
2886 | pr_err("WSNZ=1, WRITE_SAME w/sectors=0 not supported\n"); | |
2887 | goto out_invalid_cdb_field; | |
c66ac9db | 2888 | } |
706d5860 NB |
2889 | |
2890 | cmd->t_task_lba = get_unaligned_be32(&cdb[2]); | |
c66ac9db | 2891 | cmd->se_cmd_flags |= SCF_SCSI_CONTROL_SG_IO_CDB; |
706d5860 NB |
2892 | /* |
2893 | * Follow sbcr26 with WRITE_SAME (10) and check for the existence | |
2894 | * of byte 1 bit 3 UNMAP instead of original reserved field | |
2895 | */ | |
2896 | if (target_check_write_same_discard(&cdb[1], dev) < 0) | |
67236c44 | 2897 | goto out_unsupported_cdb; |
5bda90c8 | 2898 | if (!passthrough) |
6bb35e00 | 2899 | cmd->execute_cmd = target_emulate_write_same; |
c66ac9db NB |
2900 | break; |
2901 | case ALLOW_MEDIUM_REMOVAL: | |
c66ac9db | 2902 | case ERASE: |
c66ac9db NB |
2903 | case REZERO_UNIT: |
2904 | case SEEK_10: | |
c66ac9db NB |
2905 | case SPACE: |
2906 | case START_STOP: | |
2907 | case TEST_UNIT_READY: | |
2908 | case VERIFY: | |
2909 | case WRITE_FILEMARKS: | |
5bda90c8 CH |
2910 | cmd->se_cmd_flags |= SCF_SCSI_NON_DATA_CDB; |
2911 | if (!passthrough) | |
6bb35e00 | 2912 | cmd->execute_cmd = target_emulate_noop; |
5bda90c8 CH |
2913 | break; |
2914 | case GPCMD_CLOSE_TRACK: | |
2915 | case INITIALIZE_ELEMENT_STATUS: | |
2916 | case GPCMD_LOAD_UNLOAD: | |
2917 | case GPCMD_SET_SPEED: | |
c66ac9db NB |
2918 | case MOVE_MEDIUM: |
2919 | cmd->se_cmd_flags |= SCF_SCSI_NON_DATA_CDB; | |
2920 | break; | |
2921 | case REPORT_LUNS: | |
6bb35e00 | 2922 | cmd->execute_cmd = target_report_luns; |
c66ac9db NB |
2923 | size = (cdb[6] << 24) | (cdb[7] << 16) | (cdb[8] << 8) | cdb[9]; |
2924 | /* | |
2925 | * Do implict HEAD_OF_QUEUE processing for REPORT_LUNS | |
2926 | * See spc4r17 section 5.3 | |
2927 | */ | |
5951146d | 2928 | if (cmd->se_dev->dev_task_attr_type == SAM_TASK_ATTR_EMULATED) |
e66ecd50 | 2929 | cmd->sam_task_attr = MSG_HEAD_TAG; |
05d1c7c0 | 2930 | cmd->se_cmd_flags |= SCF_SCSI_CONTROL_SG_IO_CDB; |
c66ac9db | 2931 | break; |
ed0b2144 SH |
2932 | case GET_EVENT_STATUS_NOTIFICATION: |
2933 | size = (cdb[7] << 8) | cdb[8]; | |
2934 | cmd->se_cmd_flags |= SCF_SCSI_CONTROL_SG_IO_CDB; | |
8da10935 | 2935 | break; |
2936 | case ATA_16: | |
2937 | /* Only support ATA passthrough to pSCSI backends.. */ | |
2938 | if (!passthrough) | |
2939 | goto out_unsupported_cdb; | |
2940 | ||
2941 | /* T_LENGTH */ | |
2942 | switch (cdb[2] & 0x3) { | |
2943 | case 0x0: | |
2944 | sectors = 0; | |
2945 | break; | |
2946 | case 0x1: | |
2947 | sectors = (((cdb[1] & 0x1) ? cdb[3] : 0) << 8) | cdb[4]; | |
2948 | break; | |
2949 | case 0x2: | |
2950 | sectors = (((cdb[1] & 0x1) ? cdb[5] : 0) << 8) | cdb[6]; | |
2951 | break; | |
2952 | case 0x3: | |
2953 | pr_err("T_LENGTH=0x3 not supported for ATA_16\n"); | |
2954 | goto out_invalid_cdb_field; | |
2955 | } | |
2956 | ||
2957 | /* BYTE_BLOCK */ | |
2958 | if (cdb[2] & 0x4) { | |
2959 | /* BLOCK T_TYPE: 512 or sector */ | |
2960 | size = sectors * ((cdb[2] & 0x10) ? | |
2961 | dev->se_sub_dev->se_dev_attrib.block_size : 512); | |
2962 | } else { | |
2963 | /* BYTE */ | |
2964 | size = sectors; | |
2965 | } | |
2966 | cmd->se_cmd_flags |= SCF_SCSI_CONTROL_SG_IO_CDB; | |
ed0b2144 | 2967 | break; |
c66ac9db | 2968 | default: |
6708bb27 | 2969 | pr_warn("TARGET_CORE[%s]: Unsupported SCSI Opcode" |
c66ac9db | 2970 | " 0x%02x, sending CHECK_CONDITION.\n", |
e3d6f909 | 2971 | cmd->se_tfo->get_fabric_name(), cdb[0]); |
c66ac9db NB |
2972 | goto out_unsupported_cdb; |
2973 | } | |
2974 | ||
b0d79946 SAS |
2975 | if (cmd->unknown_data_length) |
2976 | cmd->data_length = size; | |
2977 | ||
c66ac9db | 2978 | if (size != cmd->data_length) { |
6708bb27 | 2979 | pr_warn("TARGET_CORE[%s]: Expected Transfer Length:" |
c66ac9db | 2980 | " %u does not match SCSI CDB Length: %u for SAM Opcode:" |
e3d6f909 | 2981 | " 0x%02x\n", cmd->se_tfo->get_fabric_name(), |
c66ac9db NB |
2982 | cmd->data_length, size, cdb[0]); |
2983 | ||
2984 | cmd->cmd_spdtl = size; | |
2985 | ||
2986 | if (cmd->data_direction == DMA_TO_DEVICE) { | |
6708bb27 | 2987 | pr_err("Rejecting underflow/overflow" |
c66ac9db NB |
2988 | " WRITE data\n"); |
2989 | goto out_invalid_cdb_field; | |
2990 | } | |
2991 | /* | |
2992 | * Reject READ_* or WRITE_* with overflow/underflow for | |
2993 | * type SCF_SCSI_DATA_SG_IO_CDB. | |
2994 | */ | |
6708bb27 AG |
2995 | if (!ret && (dev->se_sub_dev->se_dev_attrib.block_size != 512)) { |
2996 | pr_err("Failing OVERFLOW/UNDERFLOW for LBA op" | |
c66ac9db | 2997 | " CDB on non 512-byte sector setup subsystem" |
e3d6f909 | 2998 | " plugin: %s\n", dev->transport->name); |
c66ac9db NB |
2999 | /* Returns CHECK_CONDITION + INVALID_CDB_FIELD */ |
3000 | goto out_invalid_cdb_field; | |
3001 | } | |
3002 | ||
3003 | if (size > cmd->data_length) { | |
3004 | cmd->se_cmd_flags |= SCF_OVERFLOW_BIT; | |
3005 | cmd->residual_count = (size - cmd->data_length); | |
3006 | } else { | |
3007 | cmd->se_cmd_flags |= SCF_UNDERFLOW_BIT; | |
3008 | cmd->residual_count = (cmd->data_length - size); | |
3009 | } | |
3010 | cmd->data_length = size; | |
3011 | } | |
3012 | ||
7b4deef5 NB |
3013 | if (cmd->se_cmd_flags & SCF_SCSI_DATA_SG_IO_CDB) { |
3014 | if (sectors > su_dev->se_dev_attrib.fabric_max_sectors) { | |
3015 | printk_ratelimited(KERN_ERR "SCSI OP %02xh with too" | |
3016 | " big sectors %u exceeds fabric_max_sectors:" | |
3017 | " %u\n", cdb[0], sectors, | |
3018 | su_dev->se_dev_attrib.fabric_max_sectors); | |
3019 | goto out_invalid_cdb_field; | |
3020 | } | |
3021 | if (sectors > su_dev->se_dev_attrib.hw_max_sectors) { | |
3022 | printk_ratelimited(KERN_ERR "SCSI OP %02xh with too" | |
3023 | " big sectors %u exceeds backend hw_max_sectors:" | |
3024 | " %u\n", cdb[0], sectors, | |
3025 | su_dev->se_dev_attrib.hw_max_sectors); | |
3026 | goto out_invalid_cdb_field; | |
3027 | } | |
015487b8 RD |
3028 | } |
3029 | ||
5bda90c8 | 3030 | /* reject any command that we don't have a handler for */ |
6bb35e00 | 3031 | if (!(passthrough || cmd->execute_cmd || |
5bda90c8 CH |
3032 | (cmd->se_cmd_flags & SCF_SCSI_DATA_SG_IO_CDB))) |
3033 | goto out_unsupported_cdb; | |
3034 | ||
c66ac9db NB |
3035 | transport_set_supported_SAM_opcode(cmd); |
3036 | return ret; | |
3037 | ||
3038 | out_unsupported_cdb: | |
3039 | cmd->se_cmd_flags |= SCF_SCSI_CDB_EXCEPTION; | |
3040 | cmd->scsi_sense_reason = TCM_UNSUPPORTED_SCSI_OPCODE; | |
5951146d | 3041 | return -EINVAL; |
c66ac9db NB |
3042 | out_invalid_cdb_field: |
3043 | cmd->se_cmd_flags |= SCF_SCSI_CDB_EXCEPTION; | |
3044 | cmd->scsi_sense_reason = TCM_INVALID_CDB_FIELD; | |
5951146d | 3045 | return -EINVAL; |
c66ac9db NB |
3046 | } |
3047 | ||
c66ac9db | 3048 | /* |
35e0e757 | 3049 | * Called from I/O completion to determine which dormant/delayed |
c66ac9db NB |
3050 | * and ordered cmds need to have their tasks added to the execution queue. |
3051 | */ | |
3052 | static void transport_complete_task_attr(struct se_cmd *cmd) | |
3053 | { | |
5951146d | 3054 | struct se_device *dev = cmd->se_dev; |
c66ac9db NB |
3055 | struct se_cmd *cmd_p, *cmd_tmp; |
3056 | int new_active_tasks = 0; | |
3057 | ||
e66ecd50 | 3058 | if (cmd->sam_task_attr == MSG_SIMPLE_TAG) { |
c66ac9db NB |
3059 | atomic_dec(&dev->simple_cmds); |
3060 | smp_mb__after_atomic_dec(); | |
3061 | dev->dev_cur_ordered_id++; | |
6708bb27 | 3062 | pr_debug("Incremented dev->dev_cur_ordered_id: %u for" |
c66ac9db NB |
3063 | " SIMPLE: %u\n", dev->dev_cur_ordered_id, |
3064 | cmd->se_ordered_id); | |
e66ecd50 | 3065 | } else if (cmd->sam_task_attr == MSG_HEAD_TAG) { |
c66ac9db | 3066 | dev->dev_cur_ordered_id++; |
6708bb27 | 3067 | pr_debug("Incremented dev_cur_ordered_id: %u for" |
c66ac9db NB |
3068 | " HEAD_OF_QUEUE: %u\n", dev->dev_cur_ordered_id, |
3069 | cmd->se_ordered_id); | |
e66ecd50 | 3070 | } else if (cmd->sam_task_attr == MSG_ORDERED_TAG) { |
c66ac9db NB |
3071 | atomic_dec(&dev->dev_ordered_sync); |
3072 | smp_mb__after_atomic_dec(); | |
c66ac9db NB |
3073 | |
3074 | dev->dev_cur_ordered_id++; | |
6708bb27 | 3075 | pr_debug("Incremented dev_cur_ordered_id: %u for ORDERED:" |
c66ac9db NB |
3076 | " %u\n", dev->dev_cur_ordered_id, cmd->se_ordered_id); |
3077 | } | |
3078 | /* | |
3079 | * Process all commands up to the last received | |
3080 | * ORDERED task attribute which requires another blocking | |
3081 | * boundary | |
3082 | */ | |
3083 | spin_lock(&dev->delayed_cmd_lock); | |
3084 | list_for_each_entry_safe(cmd_p, cmd_tmp, | |
5951146d | 3085 | &dev->delayed_cmd_list, se_delayed_node) { |
c66ac9db | 3086 | |
5951146d | 3087 | list_del(&cmd_p->se_delayed_node); |
c66ac9db NB |
3088 | spin_unlock(&dev->delayed_cmd_lock); |
3089 | ||
6708bb27 | 3090 | pr_debug("Calling add_tasks() for" |
c66ac9db NB |
3091 | " cmd_p: 0x%02x Task Attr: 0x%02x" |
3092 | " Dormant -> Active, se_ordered_id: %u\n", | |
6708bb27 | 3093 | cmd_p->t_task_cdb[0], |
c66ac9db NB |
3094 | cmd_p->sam_task_attr, cmd_p->se_ordered_id); |
3095 | ||
cf572a96 | 3096 | target_add_to_execute_list(cmd_p); |
c66ac9db NB |
3097 | new_active_tasks++; |
3098 | ||
3099 | spin_lock(&dev->delayed_cmd_lock); | |
e66ecd50 | 3100 | if (cmd_p->sam_task_attr == MSG_ORDERED_TAG) |
c66ac9db NB |
3101 | break; |
3102 | } | |
3103 | spin_unlock(&dev->delayed_cmd_lock); | |
3104 | /* | |
3105 | * If new tasks have become active, wake up the transport thread | |
3106 | * to do the processing of the Active tasks. | |
3107 | */ | |
3108 | if (new_active_tasks != 0) | |
e3d6f909 | 3109 | wake_up_interruptible(&dev->dev_queue_obj.thread_wq); |
c66ac9db NB |
3110 | } |
3111 | ||
e057f533 | 3112 | static void transport_complete_qf(struct se_cmd *cmd) |
07bde79a NB |
3113 | { |
3114 | int ret = 0; | |
3115 | ||
e057f533 CH |
3116 | if (cmd->se_dev->dev_task_attr_type == SAM_TASK_ATTR_EMULATED) |
3117 | transport_complete_task_attr(cmd); | |
3118 | ||
3119 | if (cmd->se_cmd_flags & SCF_TRANSPORT_TASK_SENSE) { | |
3120 | ret = cmd->se_tfo->queue_status(cmd); | |
3121 | if (ret) | |
3122 | goto out; | |
3123 | } | |
07bde79a NB |
3124 | |
3125 | switch (cmd->data_direction) { | |
3126 | case DMA_FROM_DEVICE: | |
3127 | ret = cmd->se_tfo->queue_data_in(cmd); | |
3128 | break; | |
3129 | case DMA_TO_DEVICE: | |
ec98f782 | 3130 | if (cmd->t_bidi_data_sg) { |
07bde79a NB |
3131 | ret = cmd->se_tfo->queue_data_in(cmd); |
3132 | if (ret < 0) | |
e057f533 | 3133 | break; |
07bde79a NB |
3134 | } |
3135 | /* Fall through for DMA_TO_DEVICE */ | |
3136 | case DMA_NONE: | |
3137 | ret = cmd->se_tfo->queue_status(cmd); | |
3138 | break; | |
3139 | default: | |
3140 | break; | |
3141 | } | |
3142 | ||
e057f533 CH |
3143 | out: |
3144 | if (ret < 0) { | |
3145 | transport_handle_queue_full(cmd, cmd->se_dev); | |
3146 | return; | |
3147 | } | |
3148 | transport_lun_remove_cmd(cmd); | |
3149 | transport_cmd_check_stop_to_fabric(cmd); | |
07bde79a NB |
3150 | } |
3151 | ||
3152 | static void transport_handle_queue_full( | |
3153 | struct se_cmd *cmd, | |
e057f533 | 3154 | struct se_device *dev) |
07bde79a NB |
3155 | { |
3156 | spin_lock_irq(&dev->qf_cmd_lock); | |
07bde79a NB |
3157 | list_add_tail(&cmd->se_qf_node, &cmd->se_dev->qf_cmd_list); |
3158 | atomic_inc(&dev->dev_qf_count); | |
3159 | smp_mb__after_atomic_inc(); | |
3160 | spin_unlock_irq(&cmd->se_dev->qf_cmd_lock); | |
3161 | ||
3162 | schedule_work(&cmd->se_dev->qf_work_queue); | |
3163 | } | |
3164 | ||
35e0e757 | 3165 | static void target_complete_ok_work(struct work_struct *work) |
c66ac9db | 3166 | { |
35e0e757 | 3167 | struct se_cmd *cmd = container_of(work, struct se_cmd, work); |
07bde79a | 3168 | int reason = 0, ret; |
35e0e757 | 3169 | |
c66ac9db NB |
3170 | /* |
3171 | * Check if we need to move delayed/dormant tasks from cmds on the | |
3172 | * delayed execution list after a HEAD_OF_QUEUE or ORDERED Task | |
3173 | * Attribute. | |
3174 | */ | |
5951146d | 3175 | if (cmd->se_dev->dev_task_attr_type == SAM_TASK_ATTR_EMULATED) |
c66ac9db | 3176 | transport_complete_task_attr(cmd); |
07bde79a NB |
3177 | /* |
3178 | * Check to schedule QUEUE_FULL work, or execute an existing | |
3179 | * cmd->transport_qf_callback() | |
3180 | */ | |
3181 | if (atomic_read(&cmd->se_dev->dev_qf_count) != 0) | |
3182 | schedule_work(&cmd->se_dev->qf_work_queue); | |
3183 | ||
c66ac9db NB |
3184 | /* |
3185 | * Check if we need to retrieve a sense buffer from | |
3186 | * the struct se_cmd in question. | |
3187 | */ | |
3188 | if (cmd->se_cmd_flags & SCF_TRANSPORT_TASK_SENSE) { | |
3189 | if (transport_get_sense_data(cmd) < 0) | |
3190 | reason = TCM_NON_EXISTENT_LUN; | |
3191 | ||
c66ac9db | 3192 | if (cmd->scsi_status) { |
07bde79a | 3193 | ret = transport_send_check_condition_and_sense( |
c66ac9db | 3194 | cmd, reason, 1); |
f147abb4 | 3195 | if (ret == -EAGAIN || ret == -ENOMEM) |
07bde79a NB |
3196 | goto queue_full; |
3197 | ||
c66ac9db NB |
3198 | transport_lun_remove_cmd(cmd); |
3199 | transport_cmd_check_stop_to_fabric(cmd); | |
3200 | return; | |
3201 | } | |
3202 | } | |
3203 | /* | |
25985edc | 3204 | * Check for a callback, used by amongst other things |
c66ac9db NB |
3205 | * XDWRITE_READ_10 emulation. |
3206 | */ | |
3207 | if (cmd->transport_complete_callback) | |
3208 | cmd->transport_complete_callback(cmd); | |
3209 | ||
3210 | switch (cmd->data_direction) { | |
3211 | case DMA_FROM_DEVICE: | |
3212 | spin_lock(&cmd->se_lun->lun_sep_lock); | |
e3d6f909 AG |
3213 | if (cmd->se_lun->lun_sep) { |
3214 | cmd->se_lun->lun_sep->sep_stats.tx_data_octets += | |
c66ac9db NB |
3215 | cmd->data_length; |
3216 | } | |
3217 | spin_unlock(&cmd->se_lun->lun_sep_lock); | |
c66ac9db | 3218 | |
07bde79a | 3219 | ret = cmd->se_tfo->queue_data_in(cmd); |
f147abb4 | 3220 | if (ret == -EAGAIN || ret == -ENOMEM) |
07bde79a | 3221 | goto queue_full; |
c66ac9db NB |
3222 | break; |
3223 | case DMA_TO_DEVICE: | |
3224 | spin_lock(&cmd->se_lun->lun_sep_lock); | |
e3d6f909 AG |
3225 | if (cmd->se_lun->lun_sep) { |
3226 | cmd->se_lun->lun_sep->sep_stats.rx_data_octets += | |
c66ac9db NB |
3227 | cmd->data_length; |
3228 | } | |
3229 | spin_unlock(&cmd->se_lun->lun_sep_lock); | |
3230 | /* | |
3231 | * Check if we need to send READ payload for BIDI-COMMAND | |
3232 | */ | |
ec98f782 | 3233 | if (cmd->t_bidi_data_sg) { |
c66ac9db | 3234 | spin_lock(&cmd->se_lun->lun_sep_lock); |
e3d6f909 AG |
3235 | if (cmd->se_lun->lun_sep) { |
3236 | cmd->se_lun->lun_sep->sep_stats.tx_data_octets += | |
c66ac9db NB |
3237 | cmd->data_length; |
3238 | } | |
3239 | spin_unlock(&cmd->se_lun->lun_sep_lock); | |
07bde79a | 3240 | ret = cmd->se_tfo->queue_data_in(cmd); |
f147abb4 | 3241 | if (ret == -EAGAIN || ret == -ENOMEM) |
07bde79a | 3242 | goto queue_full; |
c66ac9db NB |
3243 | break; |
3244 | } | |
3245 | /* Fall through for DMA_TO_DEVICE */ | |
3246 | case DMA_NONE: | |
07bde79a | 3247 | ret = cmd->se_tfo->queue_status(cmd); |
f147abb4 | 3248 | if (ret == -EAGAIN || ret == -ENOMEM) |
07bde79a | 3249 | goto queue_full; |
c66ac9db NB |
3250 | break; |
3251 | default: | |
3252 | break; | |
3253 | } | |
3254 | ||
3255 | transport_lun_remove_cmd(cmd); | |
3256 | transport_cmd_check_stop_to_fabric(cmd); | |
07bde79a NB |
3257 | return; |
3258 | ||
3259 | queue_full: | |
6708bb27 | 3260 | pr_debug("Handling complete_ok QUEUE_FULL: se_cmd: %p," |
07bde79a | 3261 | " data_direction: %d\n", cmd, cmd->data_direction); |
e057f533 CH |
3262 | cmd->t_state = TRANSPORT_COMPLETE_QF_OK; |
3263 | transport_handle_queue_full(cmd, cmd->se_dev); | |
c66ac9db NB |
3264 | } |
3265 | ||
6708bb27 | 3266 | static inline void transport_free_sgl(struct scatterlist *sgl, int nents) |
c66ac9db | 3267 | { |
ec98f782 | 3268 | struct scatterlist *sg; |
ec98f782 | 3269 | int count; |
c66ac9db | 3270 | |
6708bb27 AG |
3271 | for_each_sg(sgl, sg, nents, count) |
3272 | __free_page(sg_page(sg)); | |
c66ac9db | 3273 | |
6708bb27 AG |
3274 | kfree(sgl); |
3275 | } | |
c66ac9db | 3276 | |
6708bb27 AG |
3277 | static inline void transport_free_pages(struct se_cmd *cmd) |
3278 | { | |
3279 | if (cmd->se_cmd_flags & SCF_PASSTHROUGH_SG_TO_MEM_NOALLOC) | |
3280 | return; | |
3281 | ||
3282 | transport_free_sgl(cmd->t_data_sg, cmd->t_data_nents); | |
ec98f782 AG |
3283 | cmd->t_data_sg = NULL; |
3284 | cmd->t_data_nents = 0; | |
c66ac9db | 3285 | |
6708bb27 | 3286 | transport_free_sgl(cmd->t_bidi_data_sg, cmd->t_bidi_data_nents); |
ec98f782 AG |
3287 | cmd->t_bidi_data_sg = NULL; |
3288 | cmd->t_bidi_data_nents = 0; | |
c66ac9db NB |
3289 | } |
3290 | ||
e26d99ae CH |
3291 | /** |
3292 | * transport_release_cmd - free a command | |
3293 | * @cmd: command to free | |
3294 | * | |
3295 | * This routine unconditionally frees a command, and reference counting | |
3296 | * or list removal must be done in the caller. | |
3297 | */ | |
3298 | static void transport_release_cmd(struct se_cmd *cmd) | |
3299 | { | |
3300 | BUG_ON(!cmd->se_tfo); | |
3301 | ||
c8e31f26 | 3302 | if (cmd->se_cmd_flags & SCF_SCSI_TMR_CDB) |
e26d99ae CH |
3303 | core_tmr_release_req(cmd->se_tmr_req); |
3304 | if (cmd->t_task_cdb != cmd->__t_task_cdb) | |
3305 | kfree(cmd->t_task_cdb); | |
3306 | /* | |
7481deb4 NB |
3307 | * If this cmd has been setup with target_get_sess_cmd(), drop |
3308 | * the kref and call ->release_cmd() in kref callback. | |
e26d99ae | 3309 | */ |
7481deb4 NB |
3310 | if (cmd->check_release != 0) { |
3311 | target_put_sess_cmd(cmd->se_sess, cmd); | |
3312 | return; | |
3313 | } | |
e26d99ae CH |
3314 | cmd->se_tfo->release_cmd(cmd); |
3315 | } | |
3316 | ||
d3df7825 CH |
3317 | /** |
3318 | * transport_put_cmd - release a reference to a command | |
3319 | * @cmd: command to release | |
3320 | * | |
3321 | * This routine releases our reference to the command and frees it if possible. | |
3322 | */ | |
39c05f32 | 3323 | static void transport_put_cmd(struct se_cmd *cmd) |
c66ac9db NB |
3324 | { |
3325 | unsigned long flags; | |
c66ac9db | 3326 | |
a1d8b49a | 3327 | spin_lock_irqsave(&cmd->t_state_lock, flags); |
4911e3cc CH |
3328 | if (atomic_read(&cmd->t_fe_count)) { |
3329 | if (!atomic_dec_and_test(&cmd->t_fe_count)) | |
3330 | goto out_busy; | |
3331 | } | |
3332 | ||
7d680f3b CH |
3333 | if (cmd->transport_state & CMD_T_DEV_ACTIVE) { |
3334 | cmd->transport_state &= ~CMD_T_DEV_ACTIVE; | |
cf572a96 | 3335 | target_remove_from_state_list(cmd); |
c66ac9db | 3336 | } |
a1d8b49a | 3337 | spin_unlock_irqrestore(&cmd->t_state_lock, flags); |
c66ac9db | 3338 | |
c66ac9db | 3339 | transport_free_pages(cmd); |
31afc39c | 3340 | transport_release_cmd(cmd); |
39c05f32 | 3341 | return; |
4911e3cc CH |
3342 | out_busy: |
3343 | spin_unlock_irqrestore(&cmd->t_state_lock, flags); | |
c66ac9db NB |
3344 | } |
3345 | ||
c66ac9db | 3346 | /* |
ec98f782 AG |
3347 | * transport_generic_map_mem_to_cmd - Use fabric-alloced pages instead of |
3348 | * allocating in the core. | |
c66ac9db NB |
3349 | * @cmd: Associated se_cmd descriptor |
3350 | * @mem: SGL style memory for TCM WRITE / READ | |
3351 | * @sg_mem_num: Number of SGL elements | |
3352 | * @mem_bidi_in: SGL style memory for TCM BIDI READ | |
3353 | * @sg_mem_bidi_num: Number of BIDI READ SGL elements | |
3354 | * | |
3355 | * Return: nonzero return cmd was rejected for -ENOMEM or inproper usage | |
3356 | * of parameters. | |
3357 | */ | |
3358 | int transport_generic_map_mem_to_cmd( | |
3359 | struct se_cmd *cmd, | |
5951146d AG |
3360 | struct scatterlist *sgl, |
3361 | u32 sgl_count, | |
3362 | struct scatterlist *sgl_bidi, | |
3363 | u32 sgl_bidi_count) | |
c66ac9db | 3364 | { |
5951146d | 3365 | if (!sgl || !sgl_count) |
c66ac9db | 3366 | return 0; |
c66ac9db | 3367 | |
c66ac9db NB |
3368 | if ((cmd->se_cmd_flags & SCF_SCSI_DATA_SG_IO_CDB) || |
3369 | (cmd->se_cmd_flags & SCF_SCSI_CONTROL_SG_IO_CDB)) { | |
fef58a60 NB |
3370 | /* |
3371 | * Reject SCSI data overflow with map_mem_to_cmd() as incoming | |
3372 | * scatterlists already have been set to follow what the fabric | |
3373 | * passes for the original expected data transfer length. | |
3374 | */ | |
3375 | if (cmd->se_cmd_flags & SCF_OVERFLOW_BIT) { | |
3376 | pr_warn("Rejecting SCSI DATA overflow for fabric using" | |
3377 | " SCF_PASSTHROUGH_SG_TO_MEM_NOALLOC\n"); | |
3378 | cmd->se_cmd_flags |= SCF_SCSI_CDB_EXCEPTION; | |
3379 | cmd->scsi_sense_reason = TCM_INVALID_CDB_FIELD; | |
3380 | return -EINVAL; | |
3381 | } | |
c66ac9db | 3382 | |
ec98f782 AG |
3383 | cmd->t_data_sg = sgl; |
3384 | cmd->t_data_nents = sgl_count; | |
c66ac9db | 3385 | |
ec98f782 AG |
3386 | if (sgl_bidi && sgl_bidi_count) { |
3387 | cmd->t_bidi_data_sg = sgl_bidi; | |
3388 | cmd->t_bidi_data_nents = sgl_bidi_count; | |
c66ac9db NB |
3389 | } |
3390 | cmd->se_cmd_flags |= SCF_PASSTHROUGH_SG_TO_MEM_NOALLOC; | |
c66ac9db NB |
3391 | } |
3392 | ||
3393 | return 0; | |
3394 | } | |
3395 | EXPORT_SYMBOL(transport_generic_map_mem_to_cmd); | |
3396 | ||
4949314c | 3397 | void *transport_kmap_data_sg(struct se_cmd *cmd) |
05d1c7c0 | 3398 | { |
ec98f782 | 3399 | struct scatterlist *sg = cmd->t_data_sg; |
4949314c AG |
3400 | struct page **pages; |
3401 | int i; | |
05d1c7c0 | 3402 | |
ec98f782 | 3403 | BUG_ON(!sg); |
05d1c7c0 | 3404 | /* |
ec98f782 AG |
3405 | * We need to take into account a possible offset here for fabrics like |
3406 | * tcm_loop who may be using a contig buffer from the SCSI midlayer for | |
3407 | * control CDBs passed as SGLs via transport_generic_map_mem_to_cmd() | |
05d1c7c0 | 3408 | */ |
4949314c AG |
3409 | if (!cmd->t_data_nents) |
3410 | return NULL; | |
3411 | else if (cmd->t_data_nents == 1) | |
3412 | return kmap(sg_page(sg)) + sg->offset; | |
3413 | ||
3414 | /* >1 page. use vmap */ | |
3415 | pages = kmalloc(sizeof(*pages) * cmd->t_data_nents, GFP_KERNEL); | |
3416 | if (!pages) | |
3417 | return NULL; | |
3418 | ||
3419 | /* convert sg[] to pages[] */ | |
3420 | for_each_sg(cmd->t_data_sg, sg, cmd->t_data_nents, i) { | |
3421 | pages[i] = sg_page(sg); | |
3422 | } | |
3423 | ||
3424 | cmd->t_data_vmap = vmap(pages, cmd->t_data_nents, VM_MAP, PAGE_KERNEL); | |
3425 | kfree(pages); | |
3426 | if (!cmd->t_data_vmap) | |
3427 | return NULL; | |
3428 | ||
3429 | return cmd->t_data_vmap + cmd->t_data_sg[0].offset; | |
05d1c7c0 | 3430 | } |
4949314c | 3431 | EXPORT_SYMBOL(transport_kmap_data_sg); |
05d1c7c0 | 3432 | |
4949314c | 3433 | void transport_kunmap_data_sg(struct se_cmd *cmd) |
05d1c7c0 | 3434 | { |
a1edf9cf | 3435 | if (!cmd->t_data_nents) { |
4949314c | 3436 | return; |
a1edf9cf | 3437 | } else if (cmd->t_data_nents == 1) { |
4949314c | 3438 | kunmap(sg_page(cmd->t_data_sg)); |
a1edf9cf AG |
3439 | return; |
3440 | } | |
4949314c AG |
3441 | |
3442 | vunmap(cmd->t_data_vmap); | |
3443 | cmd->t_data_vmap = NULL; | |
05d1c7c0 | 3444 | } |
4949314c | 3445 | EXPORT_SYMBOL(transport_kunmap_data_sg); |
05d1c7c0 | 3446 | |
c66ac9db | 3447 | static int |
05d1c7c0 | 3448 | transport_generic_get_mem(struct se_cmd *cmd) |
c66ac9db | 3449 | { |
ec98f782 AG |
3450 | u32 length = cmd->data_length; |
3451 | unsigned int nents; | |
3452 | struct page *page; | |
9db9da33 | 3453 | gfp_t zero_flag; |
ec98f782 | 3454 | int i = 0; |
c66ac9db | 3455 | |
ec98f782 AG |
3456 | nents = DIV_ROUND_UP(length, PAGE_SIZE); |
3457 | cmd->t_data_sg = kmalloc(sizeof(struct scatterlist) * nents, GFP_KERNEL); | |
3458 | if (!cmd->t_data_sg) | |
3459 | return -ENOMEM; | |
c66ac9db | 3460 | |
ec98f782 AG |
3461 | cmd->t_data_nents = nents; |
3462 | sg_init_table(cmd->t_data_sg, nents); | |
c66ac9db | 3463 | |
9db9da33 | 3464 | zero_flag = cmd->se_cmd_flags & SCF_SCSI_DATA_SG_IO_CDB ? 0 : __GFP_ZERO; |
3465 | ||
ec98f782 AG |
3466 | while (length) { |
3467 | u32 page_len = min_t(u32, length, PAGE_SIZE); | |
9db9da33 | 3468 | page = alloc_page(GFP_KERNEL | zero_flag); |
ec98f782 AG |
3469 | if (!page) |
3470 | goto out; | |
c66ac9db | 3471 | |
ec98f782 AG |
3472 | sg_set_page(&cmd->t_data_sg[i], page, page_len, 0); |
3473 | length -= page_len; | |
3474 | i++; | |
c66ac9db | 3475 | } |
c66ac9db | 3476 | return 0; |
c66ac9db | 3477 | |
ec98f782 AG |
3478 | out: |
3479 | while (i >= 0) { | |
3480 | __free_page(sg_page(&cmd->t_data_sg[i])); | |
3481 | i--; | |
c66ac9db | 3482 | } |
ec98f782 AG |
3483 | kfree(cmd->t_data_sg); |
3484 | cmd->t_data_sg = NULL; | |
3485 | return -ENOMEM; | |
c66ac9db NB |
3486 | } |
3487 | ||
da0f7619 | 3488 | /* |
b16a35b0 AG |
3489 | * Allocate any required resources to execute the command. For writes we |
3490 | * might not have the payload yet, so notify the fabric via a call to | |
3491 | * ->write_pending instead. Otherwise place it on the execution queue. | |
c66ac9db | 3492 | */ |
a1d8b49a | 3493 | int transport_generic_new_cmd(struct se_cmd *cmd) |
c66ac9db | 3494 | { |
da0f7619 | 3495 | struct se_device *dev = cmd->se_dev; |
c66ac9db NB |
3496 | int ret = 0; |
3497 | ||
3498 | /* | |
3499 | * Determine is the TCM fabric module has already allocated physical | |
3500 | * memory, and is directly calling transport_generic_map_mem_to_cmd() | |
ec98f782 | 3501 | * beforehand. |
c66ac9db | 3502 | */ |
ec98f782 AG |
3503 | if (!(cmd->se_cmd_flags & SCF_PASSTHROUGH_SG_TO_MEM_NOALLOC) && |
3504 | cmd->data_length) { | |
05d1c7c0 | 3505 | ret = transport_generic_get_mem(cmd); |
c66ac9db | 3506 | if (ret < 0) |
03e98c9e | 3507 | goto out_fail; |
c66ac9db | 3508 | } |
da0f7619 | 3509 | |
4101f0a8 CH |
3510 | /* Workaround for handling zero-length control CDBs */ |
3511 | if ((cmd->se_cmd_flags & SCF_SCSI_CONTROL_SG_IO_CDB) && | |
3512 | !cmd->data_length) { | |
7d680f3b | 3513 | spin_lock_irq(&cmd->t_state_lock); |
410f6702 | 3514 | cmd->t_state = TRANSPORT_COMPLETE; |
7d680f3b CH |
3515 | cmd->transport_state |= CMD_T_ACTIVE; |
3516 | spin_unlock_irq(&cmd->t_state_lock); | |
91ec1d35 NB |
3517 | |
3518 | if (cmd->t_task_cdb[0] == REQUEST_SENSE) { | |
3519 | u8 ua_asc = 0, ua_ascq = 0; | |
3520 | ||
3521 | core_scsi3_ua_clear_for_request_sense(cmd, | |
3522 | &ua_asc, &ua_ascq); | |
3523 | } | |
3524 | ||
410f6702 RD |
3525 | INIT_WORK(&cmd->work, target_complete_ok_work); |
3526 | queue_work(target_completion_wq, &cmd->work); | |
3527 | return 0; | |
3528 | } | |
da0f7619 | 3529 | |
4101f0a8 CH |
3530 | if (cmd->se_cmd_flags & SCF_SCSI_DATA_SG_IO_CDB) { |
3531 | struct se_dev_attrib *attr = &dev->se_sub_dev->se_dev_attrib; | |
3532 | ||
3533 | if (transport_cmd_get_valid_sectors(cmd) < 0) | |
3534 | return -EINVAL; | |
3535 | ||
3536 | BUG_ON(cmd->data_length % attr->block_size); | |
3537 | BUG_ON(DIV_ROUND_UP(cmd->data_length, attr->block_size) > | |
11e764bd | 3538 | attr->hw_max_sectors); |
da0f7619 CH |
3539 | } |
3540 | ||
4101f0a8 | 3541 | atomic_inc(&cmd->t_fe_count); |
4101f0a8 | 3542 | |
c66ac9db | 3543 | /* |
5787cacd CH |
3544 | * For WRITEs, let the fabric know its buffer is ready. |
3545 | * | |
3546 | * The command will be added to the execution queue after its write | |
3547 | * data has arrived. | |
c66ac9db NB |
3548 | */ |
3549 | if (cmd->data_direction == DMA_TO_DEVICE) { | |
cf572a96 | 3550 | target_add_to_state_list(cmd); |
c66ac9db NB |
3551 | return transport_generic_write_pending(cmd); |
3552 | } | |
3553 | /* | |
5787cacd | 3554 | * Everything else but a WRITE, add the command to the execution queue. |
c66ac9db NB |
3555 | */ |
3556 | transport_execute_tasks(cmd); | |
3557 | return 0; | |
da0f7619 CH |
3558 | |
3559 | out_fail: | |
3560 | cmd->se_cmd_flags |= SCF_SCSI_CDB_EXCEPTION; | |
3561 | cmd->scsi_sense_reason = TCM_LOGICAL_UNIT_COMMUNICATION_FAILURE; | |
3562 | return -EINVAL; | |
c66ac9db | 3563 | } |
a1d8b49a | 3564 | EXPORT_SYMBOL(transport_generic_new_cmd); |
c66ac9db NB |
3565 | |
3566 | /* transport_generic_process_write(): | |
3567 | * | |
3568 | * | |
3569 | */ | |
3570 | void transport_generic_process_write(struct se_cmd *cmd) | |
3571 | { | |
c66ac9db NB |
3572 | transport_execute_tasks(cmd); |
3573 | } | |
3574 | EXPORT_SYMBOL(transport_generic_process_write); | |
3575 | ||
e057f533 | 3576 | static void transport_write_pending_qf(struct se_cmd *cmd) |
07bde79a | 3577 | { |
f147abb4 NB |
3578 | int ret; |
3579 | ||
3580 | ret = cmd->se_tfo->write_pending(cmd); | |
3581 | if (ret == -EAGAIN || ret == -ENOMEM) { | |
e057f533 CH |
3582 | pr_debug("Handling write_pending QUEUE__FULL: se_cmd: %p\n", |
3583 | cmd); | |
3584 | transport_handle_queue_full(cmd, cmd->se_dev); | |
3585 | } | |
07bde79a NB |
3586 | } |
3587 | ||
c66ac9db NB |
3588 | static int transport_generic_write_pending(struct se_cmd *cmd) |
3589 | { | |
3590 | unsigned long flags; | |
3591 | int ret; | |
3592 | ||
a1d8b49a | 3593 | spin_lock_irqsave(&cmd->t_state_lock, flags); |
c66ac9db | 3594 | cmd->t_state = TRANSPORT_WRITE_PENDING; |
a1d8b49a | 3595 | spin_unlock_irqrestore(&cmd->t_state_lock, flags); |
07bde79a | 3596 | |
c66ac9db NB |
3597 | /* |
3598 | * Clear the se_cmd for WRITE_PENDING status in order to set | |
7d680f3b CH |
3599 | * CMD_T_ACTIVE so that transport_generic_handle_data can be called |
3600 | * from HW target mode interrupt code. This is safe to be called | |
3601 | * with transport_off=1 before the cmd->se_tfo->write_pending | |
c66ac9db NB |
3602 | * because the se_cmd->se_lun pointer is not being cleared. |
3603 | */ | |
3604 | transport_cmd_check_stop(cmd, 1, 0); | |
3605 | ||
3606 | /* | |
3607 | * Call the fabric write_pending function here to let the | |
3608 | * frontend know that WRITE buffers are ready. | |
3609 | */ | |
e3d6f909 | 3610 | ret = cmd->se_tfo->write_pending(cmd); |
f147abb4 | 3611 | if (ret == -EAGAIN || ret == -ENOMEM) |
07bde79a NB |
3612 | goto queue_full; |
3613 | else if (ret < 0) | |
c66ac9db NB |
3614 | return ret; |
3615 | ||
03e98c9e | 3616 | return 1; |
07bde79a NB |
3617 | |
3618 | queue_full: | |
6708bb27 | 3619 | pr_debug("Handling write_pending QUEUE__FULL: se_cmd: %p\n", cmd); |
07bde79a | 3620 | cmd->t_state = TRANSPORT_COMPLETE_QF_WP; |
e057f533 | 3621 | transport_handle_queue_full(cmd, cmd->se_dev); |
f147abb4 | 3622 | return 0; |
c66ac9db NB |
3623 | } |
3624 | ||
39c05f32 | 3625 | void transport_generic_free_cmd(struct se_cmd *cmd, int wait_for_tasks) |
c66ac9db | 3626 | { |
d14921d6 | 3627 | if (!(cmd->se_cmd_flags & SCF_SE_LUN_CMD)) { |
c8e31f26 | 3628 | if (wait_for_tasks && (cmd->se_cmd_flags & SCF_SCSI_TMR_CDB)) |
d14921d6 NB |
3629 | transport_wait_for_tasks(cmd); |
3630 | ||
35462975 | 3631 | transport_release_cmd(cmd); |
d14921d6 NB |
3632 | } else { |
3633 | if (wait_for_tasks) | |
3634 | transport_wait_for_tasks(cmd); | |
3635 | ||
c66ac9db NB |
3636 | core_dec_lacl_count(cmd->se_sess->se_node_acl, cmd); |
3637 | ||
82f1c8a4 | 3638 | if (cmd->se_lun) |
c66ac9db | 3639 | transport_lun_remove_cmd(cmd); |
c66ac9db | 3640 | |
39c05f32 | 3641 | transport_put_cmd(cmd); |
c66ac9db NB |
3642 | } |
3643 | } | |
3644 | EXPORT_SYMBOL(transport_generic_free_cmd); | |
3645 | ||
a17f091d NB |
3646 | /* target_get_sess_cmd - Add command to active ->sess_cmd_list |
3647 | * @se_sess: session to reference | |
3648 | * @se_cmd: command descriptor to add | |
a6360785 | 3649 | * @ack_kref: Signal that fabric will perform an ack target_put_sess_cmd() |
a17f091d | 3650 | */ |
a6360785 NB |
3651 | void target_get_sess_cmd(struct se_session *se_sess, struct se_cmd *se_cmd, |
3652 | bool ack_kref) | |
a17f091d NB |
3653 | { |
3654 | unsigned long flags; | |
3655 | ||
7481deb4 | 3656 | kref_init(&se_cmd->cmd_kref); |
a6360785 NB |
3657 | /* |
3658 | * Add a second kref if the fabric caller is expecting to handle | |
3659 | * fabric acknowledgement that requires two target_put_sess_cmd() | |
3660 | * invocations before se_cmd descriptor release. | |
3661 | */ | |
86715569 | 3662 | if (ack_kref == true) { |
a6360785 | 3663 | kref_get(&se_cmd->cmd_kref); |
86715569 NB |
3664 | se_cmd->se_cmd_flags |= SCF_ACK_KREF; |
3665 | } | |
7481deb4 | 3666 | |
a17f091d NB |
3667 | spin_lock_irqsave(&se_sess->sess_cmd_lock, flags); |
3668 | list_add_tail(&se_cmd->se_cmd_list, &se_sess->sess_cmd_list); | |
3669 | se_cmd->check_release = 1; | |
3670 | spin_unlock_irqrestore(&se_sess->sess_cmd_lock, flags); | |
3671 | } | |
3672 | EXPORT_SYMBOL(target_get_sess_cmd); | |
3673 | ||
7481deb4 | 3674 | static void target_release_cmd_kref(struct kref *kref) |
a17f091d | 3675 | { |
7481deb4 NB |
3676 | struct se_cmd *se_cmd = container_of(kref, struct se_cmd, cmd_kref); |
3677 | struct se_session *se_sess = se_cmd->se_sess; | |
a17f091d NB |
3678 | unsigned long flags; |
3679 | ||
3680 | spin_lock_irqsave(&se_sess->sess_cmd_lock, flags); | |
3681 | if (list_empty(&se_cmd->se_cmd_list)) { | |
3682 | spin_unlock_irqrestore(&se_sess->sess_cmd_lock, flags); | |
ffc32d52 | 3683 | se_cmd->se_tfo->release_cmd(se_cmd); |
7481deb4 | 3684 | return; |
a17f091d | 3685 | } |
a17f091d NB |
3686 | if (se_sess->sess_tearing_down && se_cmd->cmd_wait_set) { |
3687 | spin_unlock_irqrestore(&se_sess->sess_cmd_lock, flags); | |
3688 | complete(&se_cmd->cmd_wait_comp); | |
7481deb4 | 3689 | return; |
a17f091d NB |
3690 | } |
3691 | list_del(&se_cmd->se_cmd_list); | |
3692 | spin_unlock_irqrestore(&se_sess->sess_cmd_lock, flags); | |
3693 | ||
7481deb4 NB |
3694 | se_cmd->se_tfo->release_cmd(se_cmd); |
3695 | } | |
3696 | ||
3697 | /* target_put_sess_cmd - Check for active I/O shutdown via kref_put | |
3698 | * @se_sess: session to reference | |
3699 | * @se_cmd: command descriptor to drop | |
3700 | */ | |
3701 | int target_put_sess_cmd(struct se_session *se_sess, struct se_cmd *se_cmd) | |
3702 | { | |
3703 | return kref_put(&se_cmd->cmd_kref, target_release_cmd_kref); | |
a17f091d NB |
3704 | } |
3705 | EXPORT_SYMBOL(target_put_sess_cmd); | |
3706 | ||
3707 | /* target_splice_sess_cmd_list - Split active cmds into sess_wait_list | |
3708 | * @se_sess: session to split | |
3709 | */ | |
3710 | void target_splice_sess_cmd_list(struct se_session *se_sess) | |
3711 | { | |
3712 | struct se_cmd *se_cmd; | |
3713 | unsigned long flags; | |
3714 | ||
3715 | WARN_ON(!list_empty(&se_sess->sess_wait_list)); | |
3716 | INIT_LIST_HEAD(&se_sess->sess_wait_list); | |
3717 | ||
3718 | spin_lock_irqsave(&se_sess->sess_cmd_lock, flags); | |
3719 | se_sess->sess_tearing_down = 1; | |
3720 | ||
3721 | list_splice_init(&se_sess->sess_cmd_list, &se_sess->sess_wait_list); | |
3722 | ||
3723 | list_for_each_entry(se_cmd, &se_sess->sess_wait_list, se_cmd_list) | |
3724 | se_cmd->cmd_wait_set = 1; | |
3725 | ||
3726 | spin_unlock_irqrestore(&se_sess->sess_cmd_lock, flags); | |
3727 | } | |
3728 | EXPORT_SYMBOL(target_splice_sess_cmd_list); | |
3729 | ||
3730 | /* target_wait_for_sess_cmds - Wait for outstanding descriptors | |
3731 | * @se_sess: session to wait for active I/O | |
3732 | * @wait_for_tasks: Make extra transport_wait_for_tasks call | |
3733 | */ | |
3734 | void target_wait_for_sess_cmds( | |
3735 | struct se_session *se_sess, | |
3736 | int wait_for_tasks) | |
3737 | { | |
3738 | struct se_cmd *se_cmd, *tmp_cmd; | |
3739 | bool rc = false; | |
3740 | ||
3741 | list_for_each_entry_safe(se_cmd, tmp_cmd, | |
3742 | &se_sess->sess_wait_list, se_cmd_list) { | |
3743 | list_del(&se_cmd->se_cmd_list); | |
3744 | ||
3745 | pr_debug("Waiting for se_cmd: %p t_state: %d, fabric state:" | |
3746 | " %d\n", se_cmd, se_cmd->t_state, | |
3747 | se_cmd->se_tfo->get_cmd_state(se_cmd)); | |
3748 | ||
3749 | if (wait_for_tasks) { | |
3750 | pr_debug("Calling transport_wait_for_tasks se_cmd: %p t_state: %d," | |
3751 | " fabric state: %d\n", se_cmd, se_cmd->t_state, | |
3752 | se_cmd->se_tfo->get_cmd_state(se_cmd)); | |
3753 | ||
3754 | rc = transport_wait_for_tasks(se_cmd); | |
3755 | ||
3756 | pr_debug("After transport_wait_for_tasks se_cmd: %p t_state: %d," | |
3757 | " fabric state: %d\n", se_cmd, se_cmd->t_state, | |
3758 | se_cmd->se_tfo->get_cmd_state(se_cmd)); | |
3759 | } | |
3760 | ||
3761 | if (!rc) { | |
3762 | wait_for_completion(&se_cmd->cmd_wait_comp); | |
3763 | pr_debug("After cmd_wait_comp: se_cmd: %p t_state: %d" | |
3764 | " fabric state: %d\n", se_cmd, se_cmd->t_state, | |
3765 | se_cmd->se_tfo->get_cmd_state(se_cmd)); | |
3766 | } | |
3767 | ||
3768 | se_cmd->se_tfo->release_cmd(se_cmd); | |
3769 | } | |
3770 | } | |
3771 | EXPORT_SYMBOL(target_wait_for_sess_cmds); | |
3772 | ||
c66ac9db NB |
3773 | /* transport_lun_wait_for_tasks(): |
3774 | * | |
3775 | * Called from ConfigFS context to stop the passed struct se_cmd to allow | |
3776 | * an struct se_lun to be successfully shutdown. | |
3777 | */ | |
3778 | static int transport_lun_wait_for_tasks(struct se_cmd *cmd, struct se_lun *lun) | |
3779 | { | |
3780 | unsigned long flags; | |
cf572a96 CH |
3781 | int ret = 0; |
3782 | ||
c66ac9db NB |
3783 | /* |
3784 | * If the frontend has already requested this struct se_cmd to | |
3785 | * be stopped, we can safely ignore this struct se_cmd. | |
3786 | */ | |
a1d8b49a | 3787 | spin_lock_irqsave(&cmd->t_state_lock, flags); |
7d680f3b CH |
3788 | if (cmd->transport_state & CMD_T_STOP) { |
3789 | cmd->transport_state &= ~CMD_T_LUN_STOP; | |
3790 | ||
3791 | pr_debug("ConfigFS ITT[0x%08x] - CMD_T_STOP, skipping\n", | |
3792 | cmd->se_tfo->get_task_tag(cmd)); | |
a1d8b49a | 3793 | spin_unlock_irqrestore(&cmd->t_state_lock, flags); |
c66ac9db | 3794 | transport_cmd_check_stop(cmd, 1, 0); |
e3d6f909 | 3795 | return -EPERM; |
c66ac9db | 3796 | } |
7d680f3b | 3797 | cmd->transport_state |= CMD_T_LUN_FE_STOP; |
a1d8b49a | 3798 | spin_unlock_irqrestore(&cmd->t_state_lock, flags); |
c66ac9db | 3799 | |
5951146d | 3800 | wake_up_interruptible(&cmd->se_dev->dev_queue_obj.thread_wq); |
c66ac9db | 3801 | |
cf572a96 CH |
3802 | // XXX: audit task_flags checks. |
3803 | spin_lock_irqsave(&cmd->t_state_lock, flags); | |
3804 | if ((cmd->transport_state & CMD_T_BUSY) && | |
3805 | (cmd->transport_state & CMD_T_SENT)) { | |
3806 | if (!target_stop_cmd(cmd, &flags)) | |
3807 | ret++; | |
23019170 | 3808 | spin_unlock_irqrestore(&cmd->t_state_lock, flags); |
cf572a96 CH |
3809 | } else { |
3810 | spin_unlock_irqrestore(&cmd->t_state_lock, | |
3811 | flags); | |
3812 | target_remove_from_execute_list(cmd); | |
3813 | } | |
c66ac9db | 3814 | |
785fdf70 CH |
3815 | pr_debug("ConfigFS: cmd: %p stop tasks ret:" |
3816 | " %d\n", cmd, ret); | |
c66ac9db | 3817 | if (!ret) { |
6708bb27 | 3818 | pr_debug("ConfigFS: ITT[0x%08x] - stopping cmd....\n", |
e3d6f909 | 3819 | cmd->se_tfo->get_task_tag(cmd)); |
a1d8b49a | 3820 | wait_for_completion(&cmd->transport_lun_stop_comp); |
6708bb27 | 3821 | pr_debug("ConfigFS: ITT[0x%08x] - stopped cmd....\n", |
e3d6f909 | 3822 | cmd->se_tfo->get_task_tag(cmd)); |
c66ac9db | 3823 | } |
3df8d40b | 3824 | transport_remove_cmd_from_queue(cmd); |
c66ac9db NB |
3825 | |
3826 | return 0; | |
3827 | } | |
3828 | ||
c66ac9db NB |
3829 | static void __transport_clear_lun_from_sessions(struct se_lun *lun) |
3830 | { | |
3831 | struct se_cmd *cmd = NULL; | |
3832 | unsigned long lun_flags, cmd_flags; | |
3833 | /* | |
3834 | * Do exception processing and return CHECK_CONDITION status to the | |
3835 | * Initiator Port. | |
3836 | */ | |
3837 | spin_lock_irqsave(&lun->lun_cmd_lock, lun_flags); | |
5951146d AG |
3838 | while (!list_empty(&lun->lun_cmd_list)) { |
3839 | cmd = list_first_entry(&lun->lun_cmd_list, | |
3840 | struct se_cmd, se_lun_node); | |
3d26fea0 | 3841 | list_del_init(&cmd->se_lun_node); |
5951146d | 3842 | |
c66ac9db NB |
3843 | /* |
3844 | * This will notify iscsi_target_transport.c: | |
3845 | * transport_cmd_check_stop() that a LUN shutdown is in | |
3846 | * progress for the iscsi_cmd_t. | |
3847 | */ | |
a1d8b49a | 3848 | spin_lock(&cmd->t_state_lock); |
6708bb27 | 3849 | pr_debug("SE_LUN[%d] - Setting cmd->transport" |
c66ac9db | 3850 | "_lun_stop for ITT: 0x%08x\n", |
e3d6f909 AG |
3851 | cmd->se_lun->unpacked_lun, |
3852 | cmd->se_tfo->get_task_tag(cmd)); | |
7d680f3b | 3853 | cmd->transport_state |= CMD_T_LUN_STOP; |
a1d8b49a | 3854 | spin_unlock(&cmd->t_state_lock); |
c66ac9db NB |
3855 | |
3856 | spin_unlock_irqrestore(&lun->lun_cmd_lock, lun_flags); | |
3857 | ||
6708bb27 AG |
3858 | if (!cmd->se_lun) { |
3859 | pr_err("ITT: 0x%08x, [i,t]_state: %u/%u\n", | |
e3d6f909 AG |
3860 | cmd->se_tfo->get_task_tag(cmd), |
3861 | cmd->se_tfo->get_cmd_state(cmd), cmd->t_state); | |
c66ac9db NB |
3862 | BUG(); |
3863 | } | |
3864 | /* | |
3865 | * If the Storage engine still owns the iscsi_cmd_t, determine | |
3866 | * and/or stop its context. | |
3867 | */ | |
6708bb27 | 3868 | pr_debug("SE_LUN[%d] - ITT: 0x%08x before transport" |
e3d6f909 AG |
3869 | "_lun_wait_for_tasks()\n", cmd->se_lun->unpacked_lun, |
3870 | cmd->se_tfo->get_task_tag(cmd)); | |
c66ac9db | 3871 | |
e3d6f909 | 3872 | if (transport_lun_wait_for_tasks(cmd, cmd->se_lun) < 0) { |
c66ac9db NB |
3873 | spin_lock_irqsave(&lun->lun_cmd_lock, lun_flags); |
3874 | continue; | |
3875 | } | |
3876 | ||
6708bb27 | 3877 | pr_debug("SE_LUN[%d] - ITT: 0x%08x after transport_lun" |
c66ac9db | 3878 | "_wait_for_tasks(): SUCCESS\n", |
e3d6f909 AG |
3879 | cmd->se_lun->unpacked_lun, |
3880 | cmd->se_tfo->get_task_tag(cmd)); | |
c66ac9db | 3881 | |
a1d8b49a | 3882 | spin_lock_irqsave(&cmd->t_state_lock, cmd_flags); |
7d680f3b | 3883 | if (!(cmd->transport_state & CMD_T_DEV_ACTIVE)) { |
a1d8b49a | 3884 | spin_unlock_irqrestore(&cmd->t_state_lock, cmd_flags); |
c66ac9db NB |
3885 | goto check_cond; |
3886 | } | |
7d680f3b | 3887 | cmd->transport_state &= ~CMD_T_DEV_ACTIVE; |
cf572a96 | 3888 | target_remove_from_state_list(cmd); |
a1d8b49a | 3889 | spin_unlock_irqrestore(&cmd->t_state_lock, cmd_flags); |
c66ac9db | 3890 | |
c66ac9db NB |
3891 | /* |
3892 | * The Storage engine stopped this struct se_cmd before it was | |
3893 | * send to the fabric frontend for delivery back to the | |
3894 | * Initiator Node. Return this SCSI CDB back with an | |
3895 | * CHECK_CONDITION status. | |
3896 | */ | |
3897 | check_cond: | |
3898 | transport_send_check_condition_and_sense(cmd, | |
3899 | TCM_NON_EXISTENT_LUN, 0); | |
3900 | /* | |
3901 | * If the fabric frontend is waiting for this iscsi_cmd_t to | |
3902 | * be released, notify the waiting thread now that LU has | |
3903 | * finished accessing it. | |
3904 | */ | |
a1d8b49a | 3905 | spin_lock_irqsave(&cmd->t_state_lock, cmd_flags); |
7d680f3b | 3906 | if (cmd->transport_state & CMD_T_LUN_FE_STOP) { |
6708bb27 | 3907 | pr_debug("SE_LUN[%d] - Detected FE stop for" |
c66ac9db NB |
3908 | " struct se_cmd: %p ITT: 0x%08x\n", |
3909 | lun->unpacked_lun, | |
e3d6f909 | 3910 | cmd, cmd->se_tfo->get_task_tag(cmd)); |
c66ac9db | 3911 | |
a1d8b49a | 3912 | spin_unlock_irqrestore(&cmd->t_state_lock, |
c66ac9db NB |
3913 | cmd_flags); |
3914 | transport_cmd_check_stop(cmd, 1, 0); | |
a1d8b49a | 3915 | complete(&cmd->transport_lun_fe_stop_comp); |
c66ac9db NB |
3916 | spin_lock_irqsave(&lun->lun_cmd_lock, lun_flags); |
3917 | continue; | |
3918 | } | |
6708bb27 | 3919 | pr_debug("SE_LUN[%d] - ITT: 0x%08x finished processing\n", |
e3d6f909 | 3920 | lun->unpacked_lun, cmd->se_tfo->get_task_tag(cmd)); |
c66ac9db | 3921 | |
a1d8b49a | 3922 | spin_unlock_irqrestore(&cmd->t_state_lock, cmd_flags); |
c66ac9db NB |
3923 | spin_lock_irqsave(&lun->lun_cmd_lock, lun_flags); |
3924 | } | |
3925 | spin_unlock_irqrestore(&lun->lun_cmd_lock, lun_flags); | |
3926 | } | |
3927 | ||
3928 | static int transport_clear_lun_thread(void *p) | |
3929 | { | |
8359cf43 | 3930 | struct se_lun *lun = p; |
c66ac9db NB |
3931 | |
3932 | __transport_clear_lun_from_sessions(lun); | |
3933 | complete(&lun->lun_shutdown_comp); | |
3934 | ||
3935 | return 0; | |
3936 | } | |
3937 | ||
3938 | int transport_clear_lun_from_sessions(struct se_lun *lun) | |
3939 | { | |
3940 | struct task_struct *kt; | |
3941 | ||
5951146d | 3942 | kt = kthread_run(transport_clear_lun_thread, lun, |
c66ac9db NB |
3943 | "tcm_cl_%u", lun->unpacked_lun); |
3944 | if (IS_ERR(kt)) { | |
6708bb27 | 3945 | pr_err("Unable to start clear_lun thread\n"); |
e3d6f909 | 3946 | return PTR_ERR(kt); |
c66ac9db NB |
3947 | } |
3948 | wait_for_completion(&lun->lun_shutdown_comp); | |
3949 | ||
3950 | return 0; | |
3951 | } | |
3952 | ||
d14921d6 NB |
3953 | /** |
3954 | * transport_wait_for_tasks - wait for completion to occur | |
3955 | * @cmd: command to wait | |
c66ac9db | 3956 | * |
d14921d6 NB |
3957 | * Called from frontend fabric context to wait for storage engine |
3958 | * to pause and/or release frontend generated struct se_cmd. | |
c66ac9db | 3959 | */ |
a17f091d | 3960 | bool transport_wait_for_tasks(struct se_cmd *cmd) |
c66ac9db NB |
3961 | { |
3962 | unsigned long flags; | |
3963 | ||
a1d8b49a | 3964 | spin_lock_irqsave(&cmd->t_state_lock, flags); |
c8e31f26 AG |
3965 | if (!(cmd->se_cmd_flags & SCF_SE_LUN_CMD) && |
3966 | !(cmd->se_cmd_flags & SCF_SCSI_TMR_CDB)) { | |
d14921d6 | 3967 | spin_unlock_irqrestore(&cmd->t_state_lock, flags); |
a17f091d | 3968 | return false; |
d14921d6 NB |
3969 | } |
3970 | /* | |
3971 | * Only perform a possible wait_for_tasks if SCF_SUPPORTED_SAM_OPCODE | |
3972 | * has been set in transport_set_supported_SAM_opcode(). | |
3973 | */ | |
c8e31f26 AG |
3974 | if (!(cmd->se_cmd_flags & SCF_SUPPORTED_SAM_OPCODE) && |
3975 | !(cmd->se_cmd_flags & SCF_SCSI_TMR_CDB)) { | |
d14921d6 | 3976 | spin_unlock_irqrestore(&cmd->t_state_lock, flags); |
a17f091d | 3977 | return false; |
d14921d6 | 3978 | } |
c66ac9db NB |
3979 | /* |
3980 | * If we are already stopped due to an external event (ie: LUN shutdown) | |
3981 | * sleep until the connection can have the passed struct se_cmd back. | |
a1d8b49a | 3982 | * The cmd->transport_lun_stopped_sem will be upped by |
c66ac9db NB |
3983 | * transport_clear_lun_from_sessions() once the ConfigFS context caller |
3984 | * has completed its operation on the struct se_cmd. | |
3985 | */ | |
7d680f3b | 3986 | if (cmd->transport_state & CMD_T_LUN_STOP) { |
6708bb27 | 3987 | pr_debug("wait_for_tasks: Stopping" |
e3d6f909 | 3988 | " wait_for_completion(&cmd->t_tasktransport_lun_fe" |
c66ac9db | 3989 | "_stop_comp); for ITT: 0x%08x\n", |
e3d6f909 | 3990 | cmd->se_tfo->get_task_tag(cmd)); |
c66ac9db NB |
3991 | /* |
3992 | * There is a special case for WRITES where a FE exception + | |
3993 | * LUN shutdown means ConfigFS context is still sleeping on | |
3994 | * transport_lun_stop_comp in transport_lun_wait_for_tasks(). | |
3995 | * We go ahead and up transport_lun_stop_comp just to be sure | |
3996 | * here. | |
3997 | */ | |
a1d8b49a AG |
3998 | spin_unlock_irqrestore(&cmd->t_state_lock, flags); |
3999 | complete(&cmd->transport_lun_stop_comp); | |
4000 | wait_for_completion(&cmd->transport_lun_fe_stop_comp); | |
4001 | spin_lock_irqsave(&cmd->t_state_lock, flags); | |
c66ac9db | 4002 | |
cf572a96 | 4003 | target_remove_from_state_list(cmd); |
c66ac9db NB |
4004 | /* |
4005 | * At this point, the frontend who was the originator of this | |
4006 | * struct se_cmd, now owns the structure and can be released through | |
4007 | * normal means below. | |
4008 | */ | |
6708bb27 | 4009 | pr_debug("wait_for_tasks: Stopped" |
e3d6f909 | 4010 | " wait_for_completion(&cmd->t_tasktransport_lun_fe_" |
c66ac9db | 4011 | "stop_comp); for ITT: 0x%08x\n", |
e3d6f909 | 4012 | cmd->se_tfo->get_task_tag(cmd)); |
c66ac9db | 4013 | |
7d680f3b | 4014 | cmd->transport_state &= ~CMD_T_LUN_STOP; |
c66ac9db | 4015 | } |
7d680f3b | 4016 | |
3d28934a | 4017 | if (!(cmd->transport_state & CMD_T_ACTIVE)) { |
d14921d6 | 4018 | spin_unlock_irqrestore(&cmd->t_state_lock, flags); |
a17f091d | 4019 | return false; |
d14921d6 | 4020 | } |
c66ac9db | 4021 | |
7d680f3b | 4022 | cmd->transport_state |= CMD_T_STOP; |
c66ac9db | 4023 | |
6708bb27 | 4024 | pr_debug("wait_for_tasks: Stopping %p ITT: 0x%08x" |
7d680f3b | 4025 | " i_state: %d, t_state: %d, CMD_T_STOP\n", |
f2da9dbd CH |
4026 | cmd, cmd->se_tfo->get_task_tag(cmd), |
4027 | cmd->se_tfo->get_cmd_state(cmd), cmd->t_state); | |
c66ac9db | 4028 | |
a1d8b49a | 4029 | spin_unlock_irqrestore(&cmd->t_state_lock, flags); |
c66ac9db | 4030 | |
5951146d | 4031 | wake_up_interruptible(&cmd->se_dev->dev_queue_obj.thread_wq); |
c66ac9db | 4032 | |
a1d8b49a | 4033 | wait_for_completion(&cmd->t_transport_stop_comp); |
c66ac9db | 4034 | |
a1d8b49a | 4035 | spin_lock_irqsave(&cmd->t_state_lock, flags); |
7d680f3b | 4036 | cmd->transport_state &= ~(CMD_T_ACTIVE | CMD_T_STOP); |
c66ac9db | 4037 | |
6708bb27 | 4038 | pr_debug("wait_for_tasks: Stopped wait_for_compltion(" |
a1d8b49a | 4039 | "&cmd->t_transport_stop_comp) for ITT: 0x%08x\n", |
e3d6f909 | 4040 | cmd->se_tfo->get_task_tag(cmd)); |
c66ac9db | 4041 | |
d14921d6 | 4042 | spin_unlock_irqrestore(&cmd->t_state_lock, flags); |
a17f091d NB |
4043 | |
4044 | return true; | |
c66ac9db | 4045 | } |
d14921d6 | 4046 | EXPORT_SYMBOL(transport_wait_for_tasks); |
c66ac9db NB |
4047 | |
4048 | static int transport_get_sense_codes( | |
4049 | struct se_cmd *cmd, | |
4050 | u8 *asc, | |
4051 | u8 *ascq) | |
4052 | { | |
4053 | *asc = cmd->scsi_asc; | |
4054 | *ascq = cmd->scsi_ascq; | |
4055 | ||
4056 | return 0; | |
4057 | } | |
4058 | ||
4059 | static int transport_set_sense_codes( | |
4060 | struct se_cmd *cmd, | |
4061 | u8 asc, | |
4062 | u8 ascq) | |
4063 | { | |
4064 | cmd->scsi_asc = asc; | |
4065 | cmd->scsi_ascq = ascq; | |
4066 | ||
4067 | return 0; | |
4068 | } | |
4069 | ||
4070 | int transport_send_check_condition_and_sense( | |
4071 | struct se_cmd *cmd, | |
4072 | u8 reason, | |
4073 | int from_transport) | |
4074 | { | |
4075 | unsigned char *buffer = cmd->sense_buffer; | |
4076 | unsigned long flags; | |
4077 | int offset; | |
4078 | u8 asc = 0, ascq = 0; | |
4079 | ||
a1d8b49a | 4080 | spin_lock_irqsave(&cmd->t_state_lock, flags); |
c66ac9db | 4081 | if (cmd->se_cmd_flags & SCF_SENT_CHECK_CONDITION) { |
a1d8b49a | 4082 | spin_unlock_irqrestore(&cmd->t_state_lock, flags); |
c66ac9db NB |
4083 | return 0; |
4084 | } | |
4085 | cmd->se_cmd_flags |= SCF_SENT_CHECK_CONDITION; | |
a1d8b49a | 4086 | spin_unlock_irqrestore(&cmd->t_state_lock, flags); |
c66ac9db NB |
4087 | |
4088 | if (!reason && from_transport) | |
4089 | goto after_reason; | |
4090 | ||
4091 | if (!from_transport) | |
4092 | cmd->se_cmd_flags |= SCF_EMULATED_TASK_SENSE; | |
4093 | /* | |
4094 | * Data Segment and SenseLength of the fabric response PDU. | |
4095 | * | |
4096 | * TRANSPORT_SENSE_BUFFER is now set to SCSI_SENSE_BUFFERSIZE | |
4097 | * from include/scsi/scsi_cmnd.h | |
4098 | */ | |
e3d6f909 | 4099 | offset = cmd->se_tfo->set_fabric_sense_len(cmd, |
c66ac9db NB |
4100 | TRANSPORT_SENSE_BUFFER); |
4101 | /* | |
4102 | * Actual SENSE DATA, see SPC-3 7.23.2 SPC_SENSE_KEY_OFFSET uses | |
4103 | * SENSE KEY values from include/scsi/scsi.h | |
4104 | */ | |
4105 | switch (reason) { | |
4106 | case TCM_NON_EXISTENT_LUN: | |
eb39d340 NB |
4107 | /* CURRENT ERROR */ |
4108 | buffer[offset] = 0x70; | |
895f3022 | 4109 | buffer[offset+SPC_ADD_SENSE_LEN_OFFSET] = 10; |
eb39d340 NB |
4110 | /* ILLEGAL REQUEST */ |
4111 | buffer[offset+SPC_SENSE_KEY_OFFSET] = ILLEGAL_REQUEST; | |
4112 | /* LOGICAL UNIT NOT SUPPORTED */ | |
4113 | buffer[offset+SPC_ASC_KEY_OFFSET] = 0x25; | |
4114 | break; | |
c66ac9db NB |
4115 | case TCM_UNSUPPORTED_SCSI_OPCODE: |
4116 | case TCM_SECTOR_COUNT_TOO_MANY: | |
4117 | /* CURRENT ERROR */ | |
4118 | buffer[offset] = 0x70; | |
895f3022 | 4119 | buffer[offset+SPC_ADD_SENSE_LEN_OFFSET] = 10; |
c66ac9db NB |
4120 | /* ILLEGAL REQUEST */ |
4121 | buffer[offset+SPC_SENSE_KEY_OFFSET] = ILLEGAL_REQUEST; | |
4122 | /* INVALID COMMAND OPERATION CODE */ | |
4123 | buffer[offset+SPC_ASC_KEY_OFFSET] = 0x20; | |
4124 | break; | |
4125 | case TCM_UNKNOWN_MODE_PAGE: | |
4126 | /* CURRENT ERROR */ | |
4127 | buffer[offset] = 0x70; | |
895f3022 | 4128 | buffer[offset+SPC_ADD_SENSE_LEN_OFFSET] = 10; |
c66ac9db NB |
4129 | /* ILLEGAL REQUEST */ |
4130 | buffer[offset+SPC_SENSE_KEY_OFFSET] = ILLEGAL_REQUEST; | |
4131 | /* INVALID FIELD IN CDB */ | |
4132 | buffer[offset+SPC_ASC_KEY_OFFSET] = 0x24; | |
4133 | break; | |
4134 | case TCM_CHECK_CONDITION_ABORT_CMD: | |
4135 | /* CURRENT ERROR */ | |
4136 | buffer[offset] = 0x70; | |
895f3022 | 4137 | buffer[offset+SPC_ADD_SENSE_LEN_OFFSET] = 10; |
c66ac9db NB |
4138 | /* ABORTED COMMAND */ |
4139 | buffer[offset+SPC_SENSE_KEY_OFFSET] = ABORTED_COMMAND; | |
4140 | /* BUS DEVICE RESET FUNCTION OCCURRED */ | |
4141 | buffer[offset+SPC_ASC_KEY_OFFSET] = 0x29; | |
4142 | buffer[offset+SPC_ASCQ_KEY_OFFSET] = 0x03; | |
4143 | break; | |
4144 | case TCM_INCORRECT_AMOUNT_OF_DATA: | |
4145 | /* CURRENT ERROR */ | |
4146 | buffer[offset] = 0x70; | |
895f3022 | 4147 | buffer[offset+SPC_ADD_SENSE_LEN_OFFSET] = 10; |
c66ac9db NB |
4148 | /* ABORTED COMMAND */ |
4149 | buffer[offset+SPC_SENSE_KEY_OFFSET] = ABORTED_COMMAND; | |
4150 | /* WRITE ERROR */ | |
4151 | buffer[offset+SPC_ASC_KEY_OFFSET] = 0x0c; | |
4152 | /* NOT ENOUGH UNSOLICITED DATA */ | |
4153 | buffer[offset+SPC_ASCQ_KEY_OFFSET] = 0x0d; | |
4154 | break; | |
4155 | case TCM_INVALID_CDB_FIELD: | |
4156 | /* CURRENT ERROR */ | |
4157 | buffer[offset] = 0x70; | |
895f3022 | 4158 | buffer[offset+SPC_ADD_SENSE_LEN_OFFSET] = 10; |
9fbc8909 RD |
4159 | /* ILLEGAL REQUEST */ |
4160 | buffer[offset+SPC_SENSE_KEY_OFFSET] = ILLEGAL_REQUEST; | |
c66ac9db NB |
4161 | /* INVALID FIELD IN CDB */ |
4162 | buffer[offset+SPC_ASC_KEY_OFFSET] = 0x24; | |
4163 | break; | |
4164 | case TCM_INVALID_PARAMETER_LIST: | |
4165 | /* CURRENT ERROR */ | |
4166 | buffer[offset] = 0x70; | |
895f3022 | 4167 | buffer[offset+SPC_ADD_SENSE_LEN_OFFSET] = 10; |
9fbc8909 RD |
4168 | /* ILLEGAL REQUEST */ |
4169 | buffer[offset+SPC_SENSE_KEY_OFFSET] = ILLEGAL_REQUEST; | |
c66ac9db NB |
4170 | /* INVALID FIELD IN PARAMETER LIST */ |
4171 | buffer[offset+SPC_ASC_KEY_OFFSET] = 0x26; | |
4172 | break; | |
4173 | case TCM_UNEXPECTED_UNSOLICITED_DATA: | |
4174 | /* CURRENT ERROR */ | |
4175 | buffer[offset] = 0x70; | |
895f3022 | 4176 | buffer[offset+SPC_ADD_SENSE_LEN_OFFSET] = 10; |
c66ac9db NB |
4177 | /* ABORTED COMMAND */ |
4178 | buffer[offset+SPC_SENSE_KEY_OFFSET] = ABORTED_COMMAND; | |
4179 | /* WRITE ERROR */ | |
4180 | buffer[offset+SPC_ASC_KEY_OFFSET] = 0x0c; | |
4181 | /* UNEXPECTED_UNSOLICITED_DATA */ | |
4182 | buffer[offset+SPC_ASCQ_KEY_OFFSET] = 0x0c; | |
4183 | break; | |
4184 | case TCM_SERVICE_CRC_ERROR: | |
4185 | /* CURRENT ERROR */ | |
4186 | buffer[offset] = 0x70; | |
895f3022 | 4187 | buffer[offset+SPC_ADD_SENSE_LEN_OFFSET] = 10; |
c66ac9db NB |
4188 | /* ABORTED COMMAND */ |
4189 | buffer[offset+SPC_SENSE_KEY_OFFSET] = ABORTED_COMMAND; | |
4190 | /* PROTOCOL SERVICE CRC ERROR */ | |
4191 | buffer[offset+SPC_ASC_KEY_OFFSET] = 0x47; | |
4192 | /* N/A */ | |
4193 | buffer[offset+SPC_ASCQ_KEY_OFFSET] = 0x05; | |
4194 | break; | |
4195 | case TCM_SNACK_REJECTED: | |
4196 | /* CURRENT ERROR */ | |
4197 | buffer[offset] = 0x70; | |
895f3022 | 4198 | buffer[offset+SPC_ADD_SENSE_LEN_OFFSET] = 10; |
c66ac9db NB |
4199 | /* ABORTED COMMAND */ |
4200 | buffer[offset+SPC_SENSE_KEY_OFFSET] = ABORTED_COMMAND; | |
4201 | /* READ ERROR */ | |
4202 | buffer[offset+SPC_ASC_KEY_OFFSET] = 0x11; | |
4203 | /* FAILED RETRANSMISSION REQUEST */ | |
4204 | buffer[offset+SPC_ASCQ_KEY_OFFSET] = 0x13; | |
4205 | break; | |
4206 | case TCM_WRITE_PROTECTED: | |
4207 | /* CURRENT ERROR */ | |
4208 | buffer[offset] = 0x70; | |
895f3022 | 4209 | buffer[offset+SPC_ADD_SENSE_LEN_OFFSET] = 10; |
c66ac9db NB |
4210 | /* DATA PROTECT */ |
4211 | buffer[offset+SPC_SENSE_KEY_OFFSET] = DATA_PROTECT; | |
4212 | /* WRITE PROTECTED */ | |
4213 | buffer[offset+SPC_ASC_KEY_OFFSET] = 0x27; | |
4214 | break; | |
4215 | case TCM_CHECK_CONDITION_UNIT_ATTENTION: | |
4216 | /* CURRENT ERROR */ | |
4217 | buffer[offset] = 0x70; | |
895f3022 | 4218 | buffer[offset+SPC_ADD_SENSE_LEN_OFFSET] = 10; |
c66ac9db NB |
4219 | /* UNIT ATTENTION */ |
4220 | buffer[offset+SPC_SENSE_KEY_OFFSET] = UNIT_ATTENTION; | |
4221 | core_scsi3_ua_for_check_condition(cmd, &asc, &ascq); | |
4222 | buffer[offset+SPC_ASC_KEY_OFFSET] = asc; | |
4223 | buffer[offset+SPC_ASCQ_KEY_OFFSET] = ascq; | |
4224 | break; | |
4225 | case TCM_CHECK_CONDITION_NOT_READY: | |
4226 | /* CURRENT ERROR */ | |
4227 | buffer[offset] = 0x70; | |
895f3022 | 4228 | buffer[offset+SPC_ADD_SENSE_LEN_OFFSET] = 10; |
c66ac9db NB |
4229 | /* Not Ready */ |
4230 | buffer[offset+SPC_SENSE_KEY_OFFSET] = NOT_READY; | |
4231 | transport_get_sense_codes(cmd, &asc, &ascq); | |
4232 | buffer[offset+SPC_ASC_KEY_OFFSET] = asc; | |
4233 | buffer[offset+SPC_ASCQ_KEY_OFFSET] = ascq; | |
4234 | break; | |
4235 | case TCM_LOGICAL_UNIT_COMMUNICATION_FAILURE: | |
4236 | default: | |
4237 | /* CURRENT ERROR */ | |
4238 | buffer[offset] = 0x70; | |
895f3022 | 4239 | buffer[offset+SPC_ADD_SENSE_LEN_OFFSET] = 10; |
c66ac9db NB |
4240 | /* ILLEGAL REQUEST */ |
4241 | buffer[offset+SPC_SENSE_KEY_OFFSET] = ILLEGAL_REQUEST; | |
4242 | /* LOGICAL UNIT COMMUNICATION FAILURE */ | |
4243 | buffer[offset+SPC_ASC_KEY_OFFSET] = 0x80; | |
4244 | break; | |
4245 | } | |
4246 | /* | |
4247 | * This code uses linux/include/scsi/scsi.h SAM status codes! | |
4248 | */ | |
4249 | cmd->scsi_status = SAM_STAT_CHECK_CONDITION; | |
4250 | /* | |
4251 | * Automatically padded, this value is encoded in the fabric's | |
4252 | * data_length response PDU containing the SCSI defined sense data. | |
4253 | */ | |
4254 | cmd->scsi_sense_length = TRANSPORT_SENSE_BUFFER + offset; | |
4255 | ||
4256 | after_reason: | |
07bde79a | 4257 | return cmd->se_tfo->queue_status(cmd); |
c66ac9db NB |
4258 | } |
4259 | EXPORT_SYMBOL(transport_send_check_condition_and_sense); | |
4260 | ||
4261 | int transport_check_aborted_status(struct se_cmd *cmd, int send_status) | |
4262 | { | |
4263 | int ret = 0; | |
4264 | ||
7d680f3b | 4265 | if (cmd->transport_state & CMD_T_ABORTED) { |
6708bb27 | 4266 | if (!send_status || |
c66ac9db NB |
4267 | (cmd->se_cmd_flags & SCF_SENT_DELAYED_TAS)) |
4268 | return 1; | |
8b1e1244 | 4269 | |
6708bb27 | 4270 | pr_debug("Sending delayed SAM_STAT_TASK_ABORTED" |
c66ac9db | 4271 | " status for CDB: 0x%02x ITT: 0x%08x\n", |
a1d8b49a | 4272 | cmd->t_task_cdb[0], |
e3d6f909 | 4273 | cmd->se_tfo->get_task_tag(cmd)); |
8b1e1244 | 4274 | |
c66ac9db | 4275 | cmd->se_cmd_flags |= SCF_SENT_DELAYED_TAS; |
e3d6f909 | 4276 | cmd->se_tfo->queue_status(cmd); |
c66ac9db NB |
4277 | ret = 1; |
4278 | } | |
4279 | return ret; | |
4280 | } | |
4281 | EXPORT_SYMBOL(transport_check_aborted_status); | |
4282 | ||
4283 | void transport_send_task_abort(struct se_cmd *cmd) | |
4284 | { | |
c252f003 NB |
4285 | unsigned long flags; |
4286 | ||
4287 | spin_lock_irqsave(&cmd->t_state_lock, flags); | |
4288 | if (cmd->se_cmd_flags & SCF_SENT_CHECK_CONDITION) { | |
4289 | spin_unlock_irqrestore(&cmd->t_state_lock, flags); | |
4290 | return; | |
4291 | } | |
4292 | spin_unlock_irqrestore(&cmd->t_state_lock, flags); | |
4293 | ||
c66ac9db NB |
4294 | /* |
4295 | * If there are still expected incoming fabric WRITEs, we wait | |
4296 | * until until they have completed before sending a TASK_ABORTED | |
4297 | * response. This response with TASK_ABORTED status will be | |
4298 | * queued back to fabric module by transport_check_aborted_status(). | |
4299 | */ | |
4300 | if (cmd->data_direction == DMA_TO_DEVICE) { | |
e3d6f909 | 4301 | if (cmd->se_tfo->write_pending_status(cmd) != 0) { |
7d680f3b | 4302 | cmd->transport_state |= CMD_T_ABORTED; |
c66ac9db | 4303 | smp_mb__after_atomic_inc(); |
c66ac9db NB |
4304 | } |
4305 | } | |
4306 | cmd->scsi_status = SAM_STAT_TASK_ABORTED; | |
8b1e1244 | 4307 | |
6708bb27 | 4308 | pr_debug("Setting SAM_STAT_TASK_ABORTED status for CDB: 0x%02x," |
a1d8b49a | 4309 | " ITT: 0x%08x\n", cmd->t_task_cdb[0], |
e3d6f909 | 4310 | cmd->se_tfo->get_task_tag(cmd)); |
8b1e1244 | 4311 | |
e3d6f909 | 4312 | cmd->se_tfo->queue_status(cmd); |
c66ac9db NB |
4313 | } |
4314 | ||
e26d99ae | 4315 | static int transport_generic_do_tmr(struct se_cmd *cmd) |
c66ac9db | 4316 | { |
5951146d | 4317 | struct se_device *dev = cmd->se_dev; |
c66ac9db NB |
4318 | struct se_tmr_req *tmr = cmd->se_tmr_req; |
4319 | int ret; | |
4320 | ||
4321 | switch (tmr->function) { | |
5c6cd613 | 4322 | case TMR_ABORT_TASK: |
3d28934a | 4323 | core_tmr_abort_task(dev, tmr, cmd->se_sess); |
c66ac9db | 4324 | break; |
5c6cd613 NB |
4325 | case TMR_ABORT_TASK_SET: |
4326 | case TMR_CLEAR_ACA: | |
4327 | case TMR_CLEAR_TASK_SET: | |
c66ac9db NB |
4328 | tmr->response = TMR_TASK_MGMT_FUNCTION_NOT_SUPPORTED; |
4329 | break; | |
5c6cd613 | 4330 | case TMR_LUN_RESET: |
c66ac9db NB |
4331 | ret = core_tmr_lun_reset(dev, tmr, NULL, NULL); |
4332 | tmr->response = (!ret) ? TMR_FUNCTION_COMPLETE : | |
4333 | TMR_FUNCTION_REJECTED; | |
4334 | break; | |
5c6cd613 | 4335 | case TMR_TARGET_WARM_RESET: |
c66ac9db NB |
4336 | tmr->response = TMR_FUNCTION_REJECTED; |
4337 | break; | |
5c6cd613 | 4338 | case TMR_TARGET_COLD_RESET: |
c66ac9db NB |
4339 | tmr->response = TMR_FUNCTION_REJECTED; |
4340 | break; | |
c66ac9db | 4341 | default: |
6708bb27 | 4342 | pr_err("Uknown TMR function: 0x%02x.\n", |
c66ac9db NB |
4343 | tmr->function); |
4344 | tmr->response = TMR_FUNCTION_REJECTED; | |
4345 | break; | |
4346 | } | |
4347 | ||
4348 | cmd->t_state = TRANSPORT_ISTATE_PROCESSING; | |
e3d6f909 | 4349 | cmd->se_tfo->queue_tm_rsp(cmd); |
c66ac9db | 4350 | |
b7b8bef7 | 4351 | transport_cmd_check_stop_to_fabric(cmd); |
c66ac9db NB |
4352 | return 0; |
4353 | } | |
4354 | ||
c66ac9db NB |
4355 | /* transport_processing_thread(): |
4356 | * | |
4357 | * | |
4358 | */ | |
4359 | static int transport_processing_thread(void *param) | |
4360 | { | |
5951146d | 4361 | int ret; |
c66ac9db | 4362 | struct se_cmd *cmd; |
8359cf43 | 4363 | struct se_device *dev = param; |
c66ac9db | 4364 | |
c66ac9db | 4365 | while (!kthread_should_stop()) { |
e3d6f909 AG |
4366 | ret = wait_event_interruptible(dev->dev_queue_obj.thread_wq, |
4367 | atomic_read(&dev->dev_queue_obj.queue_cnt) || | |
c66ac9db NB |
4368 | kthread_should_stop()); |
4369 | if (ret < 0) | |
4370 | goto out; | |
4371 | ||
c66ac9db | 4372 | get_cmd: |
5951146d AG |
4373 | cmd = transport_get_cmd_from_queue(&dev->dev_queue_obj); |
4374 | if (!cmd) | |
c66ac9db NB |
4375 | continue; |
4376 | ||
5951146d | 4377 | switch (cmd->t_state) { |
680b73c5 CH |
4378 | case TRANSPORT_NEW_CMD: |
4379 | BUG(); | |
4380 | break; | |
c66ac9db | 4381 | case TRANSPORT_NEW_CMD_MAP: |
6708bb27 AG |
4382 | if (!cmd->se_tfo->new_cmd_map) { |
4383 | pr_err("cmd->se_tfo->new_cmd_map is" | |
c66ac9db NB |
4384 | " NULL for TRANSPORT_NEW_CMD_MAP\n"); |
4385 | BUG(); | |
4386 | } | |
e3d6f909 | 4387 | ret = cmd->se_tfo->new_cmd_map(cmd); |
c66ac9db | 4388 | if (ret < 0) { |
03e98c9e | 4389 | transport_generic_request_failure(cmd); |
c66ac9db NB |
4390 | break; |
4391 | } | |
c66ac9db | 4392 | ret = transport_generic_new_cmd(cmd); |
f147abb4 | 4393 | if (ret < 0) { |
03e98c9e NB |
4394 | transport_generic_request_failure(cmd); |
4395 | break; | |
c66ac9db NB |
4396 | } |
4397 | break; | |
4398 | case TRANSPORT_PROCESS_WRITE: | |
4399 | transport_generic_process_write(cmd); | |
4400 | break; | |
c66ac9db NB |
4401 | case TRANSPORT_PROCESS_TMR: |
4402 | transport_generic_do_tmr(cmd); | |
4403 | break; | |
07bde79a | 4404 | case TRANSPORT_COMPLETE_QF_WP: |
e057f533 CH |
4405 | transport_write_pending_qf(cmd); |
4406 | break; | |
4407 | case TRANSPORT_COMPLETE_QF_OK: | |
4408 | transport_complete_qf(cmd); | |
07bde79a | 4409 | break; |
c66ac9db | 4410 | default: |
f2da9dbd CH |
4411 | pr_err("Unknown t_state: %d for ITT: 0x%08x " |
4412 | "i_state: %d on SE LUN: %u\n", | |
4413 | cmd->t_state, | |
e3d6f909 AG |
4414 | cmd->se_tfo->get_task_tag(cmd), |
4415 | cmd->se_tfo->get_cmd_state(cmd), | |
4416 | cmd->se_lun->unpacked_lun); | |
c66ac9db NB |
4417 | BUG(); |
4418 | } | |
4419 | ||
4420 | goto get_cmd; | |
4421 | } | |
4422 | ||
4423 | out: | |
cf572a96 | 4424 | WARN_ON(!list_empty(&dev->state_list)); |
ce8762f6 | 4425 | WARN_ON(!list_empty(&dev->dev_queue_obj.qobj_list)); |
c66ac9db NB |
4426 | dev->process_thread = NULL; |
4427 | return 0; | |
4428 | } |