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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); |
c66ac9db | 75 | static void transport_free_dev_tasks(struct se_cmd *cmd); |
05d1c7c0 | 76 | static int transport_generic_get_mem(struct se_cmd *cmd); |
39c05f32 | 77 | static void transport_put_cmd(struct se_cmd *cmd); |
3df8d40b | 78 | static void transport_remove_cmd_from_queue(struct se_cmd *cmd); |
c66ac9db | 79 | static int transport_set_sense_codes(struct se_cmd *cmd, u8 asc, u8 ascq); |
35e0e757 | 80 | static void target_complete_ok_work(struct work_struct *work); |
c66ac9db | 81 | |
e3d6f909 | 82 | int init_se_kmem_caches(void) |
c66ac9db | 83 | { |
c66ac9db NB |
84 | se_sess_cache = kmem_cache_create("se_sess_cache", |
85 | sizeof(struct se_session), __alignof__(struct se_session), | |
86 | 0, NULL); | |
6708bb27 AG |
87 | if (!se_sess_cache) { |
88 | pr_err("kmem_cache_create() for struct se_session" | |
c66ac9db | 89 | " failed\n"); |
c8e31f26 | 90 | goto out; |
c66ac9db NB |
91 | } |
92 | se_ua_cache = kmem_cache_create("se_ua_cache", | |
93 | sizeof(struct se_ua), __alignof__(struct se_ua), | |
94 | 0, NULL); | |
6708bb27 AG |
95 | if (!se_ua_cache) { |
96 | pr_err("kmem_cache_create() for struct se_ua failed\n"); | |
35e0e757 | 97 | goto out_free_sess_cache; |
c66ac9db | 98 | } |
c66ac9db NB |
99 | t10_pr_reg_cache = kmem_cache_create("t10_pr_reg_cache", |
100 | sizeof(struct t10_pr_registration), | |
101 | __alignof__(struct t10_pr_registration), 0, NULL); | |
6708bb27 AG |
102 | if (!t10_pr_reg_cache) { |
103 | pr_err("kmem_cache_create() for struct t10_pr_registration" | |
c66ac9db | 104 | " failed\n"); |
35e0e757 | 105 | goto out_free_ua_cache; |
c66ac9db NB |
106 | } |
107 | t10_alua_lu_gp_cache = kmem_cache_create("t10_alua_lu_gp_cache", | |
108 | sizeof(struct t10_alua_lu_gp), __alignof__(struct t10_alua_lu_gp), | |
109 | 0, NULL); | |
6708bb27 AG |
110 | if (!t10_alua_lu_gp_cache) { |
111 | pr_err("kmem_cache_create() for t10_alua_lu_gp_cache" | |
c66ac9db | 112 | " failed\n"); |
35e0e757 | 113 | goto out_free_pr_reg_cache; |
c66ac9db NB |
114 | } |
115 | t10_alua_lu_gp_mem_cache = kmem_cache_create("t10_alua_lu_gp_mem_cache", | |
116 | sizeof(struct t10_alua_lu_gp_member), | |
117 | __alignof__(struct t10_alua_lu_gp_member), 0, NULL); | |
6708bb27 AG |
118 | if (!t10_alua_lu_gp_mem_cache) { |
119 | pr_err("kmem_cache_create() for t10_alua_lu_gp_mem_" | |
c66ac9db | 120 | "cache failed\n"); |
35e0e757 | 121 | goto out_free_lu_gp_cache; |
c66ac9db NB |
122 | } |
123 | t10_alua_tg_pt_gp_cache = kmem_cache_create("t10_alua_tg_pt_gp_cache", | |
124 | sizeof(struct t10_alua_tg_pt_gp), | |
125 | __alignof__(struct t10_alua_tg_pt_gp), 0, NULL); | |
6708bb27 AG |
126 | if (!t10_alua_tg_pt_gp_cache) { |
127 | pr_err("kmem_cache_create() for t10_alua_tg_pt_gp_" | |
c66ac9db | 128 | "cache failed\n"); |
35e0e757 | 129 | goto out_free_lu_gp_mem_cache; |
c66ac9db NB |
130 | } |
131 | t10_alua_tg_pt_gp_mem_cache = kmem_cache_create( | |
132 | "t10_alua_tg_pt_gp_mem_cache", | |
133 | sizeof(struct t10_alua_tg_pt_gp_member), | |
134 | __alignof__(struct t10_alua_tg_pt_gp_member), | |
135 | 0, NULL); | |
6708bb27 AG |
136 | if (!t10_alua_tg_pt_gp_mem_cache) { |
137 | pr_err("kmem_cache_create() for t10_alua_tg_pt_gp_" | |
c66ac9db | 138 | "mem_t failed\n"); |
35e0e757 | 139 | goto out_free_tg_pt_gp_cache; |
c66ac9db NB |
140 | } |
141 | ||
35e0e757 CH |
142 | target_completion_wq = alloc_workqueue("target_completion", |
143 | WQ_MEM_RECLAIM, 0); | |
144 | if (!target_completion_wq) | |
145 | goto out_free_tg_pt_gp_mem_cache; | |
146 | ||
c66ac9db | 147 | return 0; |
35e0e757 CH |
148 | |
149 | out_free_tg_pt_gp_mem_cache: | |
150 | kmem_cache_destroy(t10_alua_tg_pt_gp_mem_cache); | |
151 | out_free_tg_pt_gp_cache: | |
152 | kmem_cache_destroy(t10_alua_tg_pt_gp_cache); | |
153 | out_free_lu_gp_mem_cache: | |
154 | kmem_cache_destroy(t10_alua_lu_gp_mem_cache); | |
155 | out_free_lu_gp_cache: | |
156 | kmem_cache_destroy(t10_alua_lu_gp_cache); | |
157 | out_free_pr_reg_cache: | |
158 | kmem_cache_destroy(t10_pr_reg_cache); | |
159 | out_free_ua_cache: | |
160 | kmem_cache_destroy(se_ua_cache); | |
161 | out_free_sess_cache: | |
162 | kmem_cache_destroy(se_sess_cache); | |
c66ac9db | 163 | out: |
e3d6f909 | 164 | return -ENOMEM; |
c66ac9db NB |
165 | } |
166 | ||
e3d6f909 | 167 | void release_se_kmem_caches(void) |
c66ac9db | 168 | { |
35e0e757 | 169 | destroy_workqueue(target_completion_wq); |
c66ac9db NB |
170 | kmem_cache_destroy(se_sess_cache); |
171 | kmem_cache_destroy(se_ua_cache); | |
c66ac9db NB |
172 | kmem_cache_destroy(t10_pr_reg_cache); |
173 | kmem_cache_destroy(t10_alua_lu_gp_cache); | |
174 | kmem_cache_destroy(t10_alua_lu_gp_mem_cache); | |
175 | kmem_cache_destroy(t10_alua_tg_pt_gp_cache); | |
176 | kmem_cache_destroy(t10_alua_tg_pt_gp_mem_cache); | |
c66ac9db NB |
177 | } |
178 | ||
e3d6f909 AG |
179 | /* This code ensures unique mib indexes are handed out. */ |
180 | static DEFINE_SPINLOCK(scsi_mib_index_lock); | |
181 | static u32 scsi_mib_index[SCSI_INDEX_TYPE_MAX]; | |
e89d15ee NB |
182 | |
183 | /* | |
184 | * Allocate a new row index for the entry type specified | |
185 | */ | |
186 | u32 scsi_get_new_index(scsi_index_t type) | |
187 | { | |
188 | u32 new_index; | |
189 | ||
e3d6f909 | 190 | BUG_ON((type < 0) || (type >= SCSI_INDEX_TYPE_MAX)); |
e89d15ee | 191 | |
e3d6f909 AG |
192 | spin_lock(&scsi_mib_index_lock); |
193 | new_index = ++scsi_mib_index[type]; | |
194 | spin_unlock(&scsi_mib_index_lock); | |
e89d15ee NB |
195 | |
196 | return new_index; | |
197 | } | |
198 | ||
e26d99ae | 199 | static void transport_init_queue_obj(struct se_queue_obj *qobj) |
c66ac9db NB |
200 | { |
201 | atomic_set(&qobj->queue_cnt, 0); | |
202 | INIT_LIST_HEAD(&qobj->qobj_list); | |
203 | init_waitqueue_head(&qobj->thread_wq); | |
204 | spin_lock_init(&qobj->cmd_queue_lock); | |
205 | } | |
c66ac9db | 206 | |
dbc5623e | 207 | void transport_subsystem_check_init(void) |
c66ac9db NB |
208 | { |
209 | int ret; | |
210 | ||
dbc5623e NB |
211 | if (sub_api_initialized) |
212 | return; | |
213 | ||
c66ac9db NB |
214 | ret = request_module("target_core_iblock"); |
215 | if (ret != 0) | |
6708bb27 | 216 | pr_err("Unable to load target_core_iblock\n"); |
c66ac9db NB |
217 | |
218 | ret = request_module("target_core_file"); | |
219 | if (ret != 0) | |
6708bb27 | 220 | pr_err("Unable to load target_core_file\n"); |
c66ac9db NB |
221 | |
222 | ret = request_module("target_core_pscsi"); | |
223 | if (ret != 0) | |
6708bb27 | 224 | pr_err("Unable to load target_core_pscsi\n"); |
c66ac9db NB |
225 | |
226 | ret = request_module("target_core_stgt"); | |
227 | if (ret != 0) | |
6708bb27 | 228 | pr_err("Unable to load target_core_stgt\n"); |
c66ac9db | 229 | |
e3d6f909 | 230 | sub_api_initialized = 1; |
dbc5623e | 231 | return; |
c66ac9db NB |
232 | } |
233 | ||
234 | struct se_session *transport_init_session(void) | |
235 | { | |
236 | struct se_session *se_sess; | |
237 | ||
238 | se_sess = kmem_cache_zalloc(se_sess_cache, GFP_KERNEL); | |
6708bb27 AG |
239 | if (!se_sess) { |
240 | pr_err("Unable to allocate struct se_session from" | |
c66ac9db NB |
241 | " se_sess_cache\n"); |
242 | return ERR_PTR(-ENOMEM); | |
243 | } | |
244 | INIT_LIST_HEAD(&se_sess->sess_list); | |
245 | INIT_LIST_HEAD(&se_sess->sess_acl_list); | |
a17f091d NB |
246 | INIT_LIST_HEAD(&se_sess->sess_cmd_list); |
247 | INIT_LIST_HEAD(&se_sess->sess_wait_list); | |
248 | spin_lock_init(&se_sess->sess_cmd_lock); | |
41ac82b6 | 249 | kref_init(&se_sess->sess_kref); |
c66ac9db NB |
250 | |
251 | return se_sess; | |
252 | } | |
253 | EXPORT_SYMBOL(transport_init_session); | |
254 | ||
255 | /* | |
140854cb | 256 | * Called with spin_lock_irqsave(&struct se_portal_group->session_lock called. |
c66ac9db NB |
257 | */ |
258 | void __transport_register_session( | |
259 | struct se_portal_group *se_tpg, | |
260 | struct se_node_acl *se_nacl, | |
261 | struct se_session *se_sess, | |
262 | void *fabric_sess_ptr) | |
263 | { | |
264 | unsigned char buf[PR_REG_ISID_LEN]; | |
265 | ||
266 | se_sess->se_tpg = se_tpg; | |
267 | se_sess->fabric_sess_ptr = fabric_sess_ptr; | |
268 | /* | |
269 | * Used by struct se_node_acl's under ConfigFS to locate active se_session-t | |
270 | * | |
271 | * Only set for struct se_session's that will actually be moving I/O. | |
272 | * eg: *NOT* discovery sessions. | |
273 | */ | |
274 | if (se_nacl) { | |
275 | /* | |
276 | * If the fabric module supports an ISID based TransportID, | |
277 | * save this value in binary from the fabric I_T Nexus now. | |
278 | */ | |
e3d6f909 | 279 | if (se_tpg->se_tpg_tfo->sess_get_initiator_sid != NULL) { |
c66ac9db | 280 | memset(&buf[0], 0, PR_REG_ISID_LEN); |
e3d6f909 | 281 | se_tpg->se_tpg_tfo->sess_get_initiator_sid(se_sess, |
c66ac9db NB |
282 | &buf[0], PR_REG_ISID_LEN); |
283 | se_sess->sess_bin_isid = get_unaligned_be64(&buf[0]); | |
284 | } | |
afb999ff NB |
285 | kref_get(&se_nacl->acl_kref); |
286 | ||
c66ac9db NB |
287 | spin_lock_irq(&se_nacl->nacl_sess_lock); |
288 | /* | |
289 | * The se_nacl->nacl_sess pointer will be set to the | |
290 | * last active I_T Nexus for each struct se_node_acl. | |
291 | */ | |
292 | se_nacl->nacl_sess = se_sess; | |
293 | ||
294 | list_add_tail(&se_sess->sess_acl_list, | |
295 | &se_nacl->acl_sess_list); | |
296 | spin_unlock_irq(&se_nacl->nacl_sess_lock); | |
297 | } | |
298 | list_add_tail(&se_sess->sess_list, &se_tpg->tpg_sess_list); | |
299 | ||
6708bb27 | 300 | pr_debug("TARGET_CORE[%s]: Registered fabric_sess_ptr: %p\n", |
e3d6f909 | 301 | se_tpg->se_tpg_tfo->get_fabric_name(), se_sess->fabric_sess_ptr); |
c66ac9db NB |
302 | } |
303 | EXPORT_SYMBOL(__transport_register_session); | |
304 | ||
305 | void transport_register_session( | |
306 | struct se_portal_group *se_tpg, | |
307 | struct se_node_acl *se_nacl, | |
308 | struct se_session *se_sess, | |
309 | void *fabric_sess_ptr) | |
310 | { | |
140854cb NB |
311 | unsigned long flags; |
312 | ||
313 | spin_lock_irqsave(&se_tpg->session_lock, flags); | |
c66ac9db | 314 | __transport_register_session(se_tpg, se_nacl, se_sess, fabric_sess_ptr); |
140854cb | 315 | spin_unlock_irqrestore(&se_tpg->session_lock, flags); |
c66ac9db NB |
316 | } |
317 | EXPORT_SYMBOL(transport_register_session); | |
318 | ||
41ac82b6 NB |
319 | static void target_release_session(struct kref *kref) |
320 | { | |
321 | struct se_session *se_sess = container_of(kref, | |
322 | struct se_session, sess_kref); | |
323 | struct se_portal_group *se_tpg = se_sess->se_tpg; | |
324 | ||
325 | se_tpg->se_tpg_tfo->close_session(se_sess); | |
326 | } | |
327 | ||
328 | void target_get_session(struct se_session *se_sess) | |
329 | { | |
330 | kref_get(&se_sess->sess_kref); | |
331 | } | |
332 | EXPORT_SYMBOL(target_get_session); | |
333 | ||
334 | int target_put_session(struct se_session *se_sess) | |
335 | { | |
336 | return kref_put(&se_sess->sess_kref, target_release_session); | |
337 | } | |
338 | EXPORT_SYMBOL(target_put_session); | |
339 | ||
afb999ff NB |
340 | static void target_complete_nacl(struct kref *kref) |
341 | { | |
342 | struct se_node_acl *nacl = container_of(kref, | |
343 | struct se_node_acl, acl_kref); | |
344 | ||
345 | complete(&nacl->acl_free_comp); | |
346 | } | |
347 | ||
348 | void target_put_nacl(struct se_node_acl *nacl) | |
349 | { | |
350 | kref_put(&nacl->acl_kref, target_complete_nacl); | |
351 | } | |
352 | ||
c66ac9db NB |
353 | void transport_deregister_session_configfs(struct se_session *se_sess) |
354 | { | |
355 | struct se_node_acl *se_nacl; | |
23388864 | 356 | unsigned long flags; |
c66ac9db NB |
357 | /* |
358 | * Used by struct se_node_acl's under ConfigFS to locate active struct se_session | |
359 | */ | |
360 | se_nacl = se_sess->se_node_acl; | |
6708bb27 | 361 | if (se_nacl) { |
23388864 | 362 | spin_lock_irqsave(&se_nacl->nacl_sess_lock, flags); |
337c0607 NB |
363 | if (se_nacl->acl_stop == 0) |
364 | list_del(&se_sess->sess_acl_list); | |
c66ac9db NB |
365 | /* |
366 | * If the session list is empty, then clear the pointer. | |
367 | * Otherwise, set the struct se_session pointer from the tail | |
368 | * element of the per struct se_node_acl active session list. | |
369 | */ | |
370 | if (list_empty(&se_nacl->acl_sess_list)) | |
371 | se_nacl->nacl_sess = NULL; | |
372 | else { | |
373 | se_nacl->nacl_sess = container_of( | |
374 | se_nacl->acl_sess_list.prev, | |
375 | struct se_session, sess_acl_list); | |
376 | } | |
23388864 | 377 | spin_unlock_irqrestore(&se_nacl->nacl_sess_lock, flags); |
c66ac9db NB |
378 | } |
379 | } | |
380 | EXPORT_SYMBOL(transport_deregister_session_configfs); | |
381 | ||
382 | void transport_free_session(struct se_session *se_sess) | |
383 | { | |
384 | kmem_cache_free(se_sess_cache, se_sess); | |
385 | } | |
386 | EXPORT_SYMBOL(transport_free_session); | |
387 | ||
388 | void transport_deregister_session(struct se_session *se_sess) | |
389 | { | |
390 | struct se_portal_group *se_tpg = se_sess->se_tpg; | |
01468346 | 391 | struct target_core_fabric_ops *se_tfo; |
c66ac9db | 392 | struct se_node_acl *se_nacl; |
e63a8e19 | 393 | unsigned long flags; |
01468346 | 394 | bool comp_nacl = true; |
c66ac9db | 395 | |
6708bb27 | 396 | if (!se_tpg) { |
c66ac9db NB |
397 | transport_free_session(se_sess); |
398 | return; | |
399 | } | |
01468346 | 400 | se_tfo = se_tpg->se_tpg_tfo; |
c66ac9db | 401 | |
e63a8e19 | 402 | spin_lock_irqsave(&se_tpg->session_lock, flags); |
c66ac9db NB |
403 | list_del(&se_sess->sess_list); |
404 | se_sess->se_tpg = NULL; | |
405 | se_sess->fabric_sess_ptr = NULL; | |
e63a8e19 | 406 | spin_unlock_irqrestore(&se_tpg->session_lock, flags); |
c66ac9db NB |
407 | |
408 | /* | |
409 | * Determine if we need to do extra work for this initiator node's | |
410 | * struct se_node_acl if it had been previously dynamically generated. | |
411 | */ | |
412 | se_nacl = se_sess->se_node_acl; | |
01468346 NB |
413 | |
414 | spin_lock_irqsave(&se_tpg->acl_node_lock, flags); | |
415 | if (se_nacl && se_nacl->dynamic_node_acl) { | |
416 | if (!se_tfo->tpg_check_demo_mode_cache(se_tpg)) { | |
417 | list_del(&se_nacl->acl_list); | |
418 | se_tpg->num_node_acls--; | |
419 | spin_unlock_irqrestore(&se_tpg->acl_node_lock, flags); | |
420 | core_tpg_wait_for_nacl_pr_ref(se_nacl); | |
421 | core_free_device_list_for_node(se_nacl, se_tpg); | |
422 | se_tfo->tpg_release_fabric_acl(se_tpg, se_nacl); | |
423 | ||
424 | comp_nacl = false; | |
425 | spin_lock_irqsave(&se_tpg->acl_node_lock, flags); | |
c66ac9db | 426 | } |
c66ac9db | 427 | } |
01468346 | 428 | spin_unlock_irqrestore(&se_tpg->acl_node_lock, flags); |
c66ac9db | 429 | |
6708bb27 | 430 | pr_debug("TARGET_CORE[%s]: Deregistered fabric_sess\n", |
e3d6f909 | 431 | se_tpg->se_tpg_tfo->get_fabric_name()); |
01468346 | 432 | /* |
afb999ff NB |
433 | * If last kref is dropping now for an explict NodeACL, awake sleeping |
434 | * ->acl_free_comp caller to wakeup configfs se_node_acl->acl_group | |
435 | * removal context. | |
01468346 NB |
436 | */ |
437 | if (se_nacl && comp_nacl == true) | |
afb999ff | 438 | target_put_nacl(se_nacl); |
01468346 | 439 | |
afb999ff | 440 | transport_free_session(se_sess); |
c66ac9db NB |
441 | } |
442 | EXPORT_SYMBOL(transport_deregister_session); | |
443 | ||
444 | /* | |
a1d8b49a | 445 | * Called with cmd->t_state_lock held. |
c66ac9db NB |
446 | */ |
447 | static void transport_all_task_dev_remove_state(struct se_cmd *cmd) | |
448 | { | |
42bf829e | 449 | struct se_device *dev = cmd->se_dev; |
c66ac9db NB |
450 | struct se_task *task; |
451 | unsigned long flags; | |
452 | ||
42bf829e CH |
453 | if (!dev) |
454 | return; | |
c66ac9db | 455 | |
42bf829e | 456 | list_for_each_entry(task, &cmd->t_task_list, t_list) { |
6c76bf95 | 457 | if (task->task_flags & TF_ACTIVE) |
c66ac9db NB |
458 | continue; |
459 | ||
c66ac9db | 460 | spin_lock_irqsave(&dev->execute_task_lock, flags); |
1880807a CH |
461 | if (task->t_state_active) { |
462 | pr_debug("Removed ITT: 0x%08x dev: %p task[%p]\n", | |
463 | cmd->se_tfo->get_task_tag(cmd), dev, task); | |
c66ac9db | 464 | |
1880807a CH |
465 | list_del(&task->t_state_list); |
466 | atomic_dec(&cmd->t_task_cdbs_ex_left); | |
467 | task->t_state_active = false; | |
468 | } | |
469 | spin_unlock_irqrestore(&dev->execute_task_lock, flags); | |
c66ac9db | 470 | } |
1880807a | 471 | |
c66ac9db NB |
472 | } |
473 | ||
474 | /* transport_cmd_check_stop(): | |
475 | * | |
7d680f3b | 476 | * 'transport_off = 1' determines if CMD_T_ACTIVE should be cleared. |
c66ac9db NB |
477 | * 'transport_off = 2' determines if task_dev_state should be removed. |
478 | * | |
479 | * A non-zero u8 t_state sets cmd->t_state. | |
480 | * Returns 1 when command is stopped, else 0. | |
481 | */ | |
482 | static int transport_cmd_check_stop( | |
483 | struct se_cmd *cmd, | |
484 | int transport_off, | |
485 | u8 t_state) | |
486 | { | |
487 | unsigned long flags; | |
488 | ||
a1d8b49a | 489 | spin_lock_irqsave(&cmd->t_state_lock, flags); |
c66ac9db NB |
490 | /* |
491 | * Determine if IOCTL context caller in requesting the stopping of this | |
492 | * command for LUN shutdown purposes. | |
493 | */ | |
7d680f3b CH |
494 | if (cmd->transport_state & CMD_T_LUN_STOP) { |
495 | pr_debug("%s:%d CMD_T_LUN_STOP for ITT: 0x%08x\n", | |
496 | __func__, __LINE__, cmd->se_tfo->get_task_tag(cmd)); | |
c66ac9db | 497 | |
7d680f3b | 498 | cmd->transport_state &= ~CMD_T_ACTIVE; |
c66ac9db NB |
499 | if (transport_off == 2) |
500 | transport_all_task_dev_remove_state(cmd); | |
a1d8b49a | 501 | spin_unlock_irqrestore(&cmd->t_state_lock, flags); |
c66ac9db | 502 | |
a1d8b49a | 503 | complete(&cmd->transport_lun_stop_comp); |
c66ac9db NB |
504 | return 1; |
505 | } | |
506 | /* | |
507 | * Determine if frontend context caller is requesting the stopping of | |
e3d6f909 | 508 | * this command for frontend exceptions. |
c66ac9db | 509 | */ |
7d680f3b CH |
510 | if (cmd->transport_state & CMD_T_STOP) { |
511 | pr_debug("%s:%d CMD_T_STOP for ITT: 0x%08x\n", | |
512 | __func__, __LINE__, | |
e3d6f909 | 513 | cmd->se_tfo->get_task_tag(cmd)); |
c66ac9db | 514 | |
c66ac9db NB |
515 | if (transport_off == 2) |
516 | transport_all_task_dev_remove_state(cmd); | |
517 | ||
518 | /* | |
519 | * Clear struct se_cmd->se_lun before the transport_off == 2 handoff | |
520 | * to FE. | |
521 | */ | |
522 | if (transport_off == 2) | |
523 | cmd->se_lun = NULL; | |
a1d8b49a | 524 | spin_unlock_irqrestore(&cmd->t_state_lock, flags); |
c66ac9db | 525 | |
a1d8b49a | 526 | complete(&cmd->t_transport_stop_comp); |
c66ac9db NB |
527 | return 1; |
528 | } | |
529 | if (transport_off) { | |
7d680f3b | 530 | cmd->transport_state &= ~CMD_T_ACTIVE; |
c66ac9db NB |
531 | if (transport_off == 2) { |
532 | transport_all_task_dev_remove_state(cmd); | |
533 | /* | |
534 | * Clear struct se_cmd->se_lun before the transport_off == 2 | |
535 | * handoff to fabric module. | |
536 | */ | |
537 | cmd->se_lun = NULL; | |
538 | /* | |
539 | * Some fabric modules like tcm_loop can release | |
25985edc | 540 | * their internally allocated I/O reference now and |
c66ac9db | 541 | * struct se_cmd now. |
88dd9e26 NB |
542 | * |
543 | * Fabric modules are expected to return '1' here if the | |
544 | * se_cmd being passed is released at this point, | |
545 | * or zero if not being released. | |
c66ac9db | 546 | */ |
e3d6f909 | 547 | if (cmd->se_tfo->check_stop_free != NULL) { |
c66ac9db | 548 | spin_unlock_irqrestore( |
a1d8b49a | 549 | &cmd->t_state_lock, flags); |
c66ac9db | 550 | |
88dd9e26 | 551 | return cmd->se_tfo->check_stop_free(cmd); |
c66ac9db NB |
552 | } |
553 | } | |
a1d8b49a | 554 | spin_unlock_irqrestore(&cmd->t_state_lock, flags); |
c66ac9db NB |
555 | |
556 | return 0; | |
557 | } else if (t_state) | |
558 | cmd->t_state = t_state; | |
a1d8b49a | 559 | spin_unlock_irqrestore(&cmd->t_state_lock, flags); |
c66ac9db NB |
560 | |
561 | return 0; | |
562 | } | |
563 | ||
564 | static int transport_cmd_check_stop_to_fabric(struct se_cmd *cmd) | |
565 | { | |
566 | return transport_cmd_check_stop(cmd, 2, 0); | |
567 | } | |
568 | ||
569 | static void transport_lun_remove_cmd(struct se_cmd *cmd) | |
570 | { | |
e3d6f909 | 571 | struct se_lun *lun = cmd->se_lun; |
c66ac9db NB |
572 | unsigned long flags; |
573 | ||
574 | if (!lun) | |
575 | return; | |
576 | ||
a1d8b49a | 577 | spin_lock_irqsave(&cmd->t_state_lock, flags); |
7d680f3b CH |
578 | if (cmd->transport_state & CMD_T_DEV_ACTIVE) { |
579 | cmd->transport_state &= ~CMD_T_DEV_ACTIVE; | |
580 | transport_all_task_dev_remove_state(cmd); | |
c66ac9db | 581 | } |
a1d8b49a | 582 | spin_unlock_irqrestore(&cmd->t_state_lock, flags); |
c66ac9db | 583 | |
c66ac9db | 584 | spin_lock_irqsave(&lun->lun_cmd_lock, flags); |
3d26fea0 CH |
585 | if (!list_empty(&cmd->se_lun_node)) |
586 | list_del_init(&cmd->se_lun_node); | |
c66ac9db NB |
587 | spin_unlock_irqrestore(&lun->lun_cmd_lock, flags); |
588 | } | |
589 | ||
590 | void transport_cmd_finish_abort(struct se_cmd *cmd, int remove) | |
591 | { | |
c8e31f26 | 592 | if (!(cmd->se_cmd_flags & SCF_SCSI_TMR_CDB)) |
8dc52b54 | 593 | transport_lun_remove_cmd(cmd); |
c66ac9db NB |
594 | |
595 | if (transport_cmd_check_stop_to_fabric(cmd)) | |
596 | return; | |
77039d1e | 597 | if (remove) { |
3df8d40b | 598 | transport_remove_cmd_from_queue(cmd); |
e6a2573f | 599 | transport_put_cmd(cmd); |
77039d1e | 600 | } |
c66ac9db NB |
601 | } |
602 | ||
f7a5cc0b CH |
603 | static void transport_add_cmd_to_queue(struct se_cmd *cmd, int t_state, |
604 | bool at_head) | |
c66ac9db NB |
605 | { |
606 | struct se_device *dev = cmd->se_dev; | |
e3d6f909 | 607 | struct se_queue_obj *qobj = &dev->dev_queue_obj; |
c66ac9db NB |
608 | unsigned long flags; |
609 | ||
c66ac9db | 610 | if (t_state) { |
a1d8b49a | 611 | spin_lock_irqsave(&cmd->t_state_lock, flags); |
c66ac9db | 612 | cmd->t_state = t_state; |
7d680f3b | 613 | cmd->transport_state |= CMD_T_ACTIVE; |
a1d8b49a | 614 | spin_unlock_irqrestore(&cmd->t_state_lock, flags); |
c66ac9db NB |
615 | } |
616 | ||
617 | spin_lock_irqsave(&qobj->cmd_queue_lock, flags); | |
79a7fef2 RD |
618 | |
619 | /* If the cmd is already on the list, remove it before we add it */ | |
620 | if (!list_empty(&cmd->se_queue_node)) | |
621 | list_del(&cmd->se_queue_node); | |
622 | else | |
623 | atomic_inc(&qobj->queue_cnt); | |
624 | ||
f7a5cc0b | 625 | if (at_head) |
07bde79a | 626 | list_add(&cmd->se_queue_node, &qobj->qobj_list); |
f7a5cc0b | 627 | else |
07bde79a | 628 | list_add_tail(&cmd->se_queue_node, &qobj->qobj_list); |
7d680f3b | 629 | cmd->transport_state |= CMD_T_QUEUED; |
c66ac9db NB |
630 | spin_unlock_irqrestore(&qobj->cmd_queue_lock, flags); |
631 | ||
c66ac9db | 632 | wake_up_interruptible(&qobj->thread_wq); |
c66ac9db NB |
633 | } |
634 | ||
5951146d AG |
635 | static struct se_cmd * |
636 | transport_get_cmd_from_queue(struct se_queue_obj *qobj) | |
c66ac9db | 637 | { |
5951146d | 638 | struct se_cmd *cmd; |
c66ac9db NB |
639 | unsigned long flags; |
640 | ||
641 | spin_lock_irqsave(&qobj->cmd_queue_lock, flags); | |
642 | if (list_empty(&qobj->qobj_list)) { | |
643 | spin_unlock_irqrestore(&qobj->cmd_queue_lock, flags); | |
644 | return NULL; | |
645 | } | |
5951146d | 646 | cmd = list_first_entry(&qobj->qobj_list, struct se_cmd, se_queue_node); |
c66ac9db | 647 | |
7d680f3b | 648 | cmd->transport_state &= ~CMD_T_QUEUED; |
79a7fef2 | 649 | list_del_init(&cmd->se_queue_node); |
c66ac9db NB |
650 | atomic_dec(&qobj->queue_cnt); |
651 | spin_unlock_irqrestore(&qobj->cmd_queue_lock, flags); | |
652 | ||
5951146d | 653 | return cmd; |
c66ac9db NB |
654 | } |
655 | ||
3df8d40b | 656 | static void transport_remove_cmd_from_queue(struct se_cmd *cmd) |
c66ac9db | 657 | { |
3df8d40b | 658 | struct se_queue_obj *qobj = &cmd->se_dev->dev_queue_obj; |
c66ac9db NB |
659 | unsigned long flags; |
660 | ||
661 | spin_lock_irqsave(&qobj->cmd_queue_lock, flags); | |
7d680f3b | 662 | if (!(cmd->transport_state & CMD_T_QUEUED)) { |
c66ac9db NB |
663 | spin_unlock_irqrestore(&qobj->cmd_queue_lock, flags); |
664 | return; | |
665 | } | |
7d680f3b | 666 | cmd->transport_state &= ~CMD_T_QUEUED; |
79a7fef2 RD |
667 | atomic_dec(&qobj->queue_cnt); |
668 | list_del_init(&cmd->se_queue_node); | |
c66ac9db | 669 | spin_unlock_irqrestore(&qobj->cmd_queue_lock, flags); |
c66ac9db NB |
670 | } |
671 | ||
672 | /* | |
673 | * Completion function used by TCM subsystem plugins (such as FILEIO) | |
674 | * for queueing up response from struct se_subsystem_api->do_task() | |
675 | */ | |
676 | void transport_complete_sync_cache(struct se_cmd *cmd, int good) | |
677 | { | |
a1d8b49a | 678 | struct se_task *task = list_entry(cmd->t_task_list.next, |
c66ac9db NB |
679 | struct se_task, t_list); |
680 | ||
681 | if (good) { | |
682 | cmd->scsi_status = SAM_STAT_GOOD; | |
683 | task->task_scsi_status = GOOD; | |
684 | } else { | |
685 | task->task_scsi_status = SAM_STAT_CHECK_CONDITION; | |
03e98c9e NB |
686 | task->task_se_cmd->scsi_sense_reason = |
687 | TCM_LOGICAL_UNIT_COMMUNICATION_FAILURE; | |
688 | ||
c66ac9db NB |
689 | } |
690 | ||
691 | transport_complete_task(task, good); | |
692 | } | |
693 | EXPORT_SYMBOL(transport_complete_sync_cache); | |
694 | ||
35e0e757 CH |
695 | static void target_complete_failure_work(struct work_struct *work) |
696 | { | |
697 | struct se_cmd *cmd = container_of(work, struct se_cmd, work); | |
698 | ||
03e98c9e | 699 | transport_generic_request_failure(cmd); |
35e0e757 CH |
700 | } |
701 | ||
c66ac9db NB |
702 | /* transport_complete_task(): |
703 | * | |
704 | * Called from interrupt and non interrupt context depending | |
705 | * on the transport plugin. | |
706 | */ | |
707 | void transport_complete_task(struct se_task *task, int success) | |
708 | { | |
e3d6f909 | 709 | struct se_cmd *cmd = task->task_se_cmd; |
42bf829e | 710 | struct se_device *dev = cmd->se_dev; |
c66ac9db | 711 | unsigned long flags; |
c66ac9db | 712 | |
a1d8b49a | 713 | spin_lock_irqsave(&cmd->t_state_lock, flags); |
6c76bf95 | 714 | task->task_flags &= ~TF_ACTIVE; |
c66ac9db NB |
715 | |
716 | /* | |
717 | * See if any sense data exists, if so set the TASK_SENSE flag. | |
718 | * Also check for any other post completion work that needs to be | |
719 | * done by the plugins. | |
720 | */ | |
721 | if (dev && dev->transport->transport_complete) { | |
722 | if (dev->transport->transport_complete(task) != 0) { | |
723 | cmd->se_cmd_flags |= SCF_TRANSPORT_TASK_SENSE; | |
ef804a84 | 724 | task->task_flags |= TF_HAS_SENSE; |
c66ac9db NB |
725 | success = 1; |
726 | } | |
727 | } | |
728 | ||
729 | /* | |
730 | * See if we are waiting for outstanding struct se_task | |
731 | * to complete for an exception condition | |
732 | */ | |
6c76bf95 | 733 | if (task->task_flags & TF_REQUEST_STOP) { |
a1d8b49a | 734 | spin_unlock_irqrestore(&cmd->t_state_lock, flags); |
c66ac9db NB |
735 | complete(&task->task_stop_comp); |
736 | return; | |
737 | } | |
2235007c CH |
738 | |
739 | if (!success) | |
7d680f3b | 740 | cmd->transport_state |= CMD_T_FAILED; |
2235007c | 741 | |
c66ac9db NB |
742 | /* |
743 | * Decrement the outstanding t_task_cdbs_left count. The last | |
744 | * struct se_task from struct se_cmd will complete itself into the | |
745 | * device queue depending upon int success. | |
746 | */ | |
6708bb27 | 747 | if (!atomic_dec_and_test(&cmd->t_task_cdbs_left)) { |
a1d8b49a | 748 | spin_unlock_irqrestore(&cmd->t_state_lock, flags); |
c66ac9db NB |
749 | return; |
750 | } | |
3d28934a NB |
751 | /* |
752 | * Check for case where an explict ABORT_TASK has been received | |
753 | * and transport_wait_for_tasks() will be waiting for completion.. | |
754 | */ | |
755 | if (cmd->transport_state & CMD_T_ABORTED && | |
756 | cmd->transport_state & CMD_T_STOP) { | |
757 | spin_unlock_irqrestore(&cmd->t_state_lock, flags); | |
758 | complete(&cmd->t_transport_stop_comp); | |
759 | return; | |
760 | } else if (cmd->transport_state & CMD_T_FAILED) { | |
41e16e98 | 761 | cmd->scsi_sense_reason = TCM_LOGICAL_UNIT_COMMUNICATION_FAILURE; |
35e0e757 | 762 | INIT_WORK(&cmd->work, target_complete_failure_work); |
c66ac9db | 763 | } else { |
35e0e757 | 764 | INIT_WORK(&cmd->work, target_complete_ok_work); |
c66ac9db | 765 | } |
35e0e757 | 766 | |
35e0e757 | 767 | cmd->t_state = TRANSPORT_COMPLETE; |
3d28934a | 768 | cmd->transport_state |= (CMD_T_COMPLETE | CMD_T_ACTIVE); |
a1d8b49a | 769 | spin_unlock_irqrestore(&cmd->t_state_lock, flags); |
c66ac9db | 770 | |
35e0e757 | 771 | queue_work(target_completion_wq, &cmd->work); |
c66ac9db NB |
772 | } |
773 | EXPORT_SYMBOL(transport_complete_task); | |
774 | ||
775 | /* | |
776 | * Called by transport_add_tasks_from_cmd() once a struct se_cmd's | |
777 | * struct se_task list are ready to be added to the active execution list | |
778 | * struct se_device | |
779 | ||
780 | * Called with se_dev_t->execute_task_lock called. | |
781 | */ | |
782 | static inline int transport_add_task_check_sam_attr( | |
783 | struct se_task *task, | |
784 | struct se_task *task_prev, | |
785 | struct se_device *dev) | |
786 | { | |
787 | /* | |
788 | * No SAM Task attribute emulation enabled, add to tail of | |
789 | * execution queue | |
790 | */ | |
791 | if (dev->dev_task_attr_type != SAM_TASK_ATTR_EMULATED) { | |
792 | list_add_tail(&task->t_execute_list, &dev->execute_task_list); | |
793 | return 0; | |
794 | } | |
795 | /* | |
796 | * HEAD_OF_QUEUE attribute for received CDB, which means | |
797 | * the first task that is associated with a struct se_cmd goes to | |
798 | * head of the struct se_device->execute_task_list, and task_prev | |
799 | * after that for each subsequent task | |
800 | */ | |
e66ecd50 | 801 | if (task->task_se_cmd->sam_task_attr == MSG_HEAD_TAG) { |
c66ac9db NB |
802 | list_add(&task->t_execute_list, |
803 | (task_prev != NULL) ? | |
804 | &task_prev->t_execute_list : | |
805 | &dev->execute_task_list); | |
806 | ||
6708bb27 | 807 | pr_debug("Set HEAD_OF_QUEUE for task CDB: 0x%02x" |
c66ac9db | 808 | " in execution queue\n", |
6708bb27 | 809 | task->task_se_cmd->t_task_cdb[0]); |
c66ac9db NB |
810 | return 1; |
811 | } | |
812 | /* | |
813 | * For ORDERED, SIMPLE or UNTAGGED attribute tasks once they have been | |
814 | * transitioned from Dermant -> Active state, and are added to the end | |
815 | * of the struct se_device->execute_task_list | |
816 | */ | |
817 | list_add_tail(&task->t_execute_list, &dev->execute_task_list); | |
818 | return 0; | |
819 | } | |
820 | ||
821 | /* __transport_add_task_to_execute_queue(): | |
822 | * | |
823 | * Called with se_dev_t->execute_task_lock called. | |
824 | */ | |
825 | static void __transport_add_task_to_execute_queue( | |
826 | struct se_task *task, | |
827 | struct se_task *task_prev, | |
828 | struct se_device *dev) | |
829 | { | |
830 | int head_of_queue; | |
831 | ||
832 | head_of_queue = transport_add_task_check_sam_attr(task, task_prev, dev); | |
833 | atomic_inc(&dev->execute_tasks); | |
834 | ||
1880807a | 835 | if (task->t_state_active) |
c66ac9db NB |
836 | return; |
837 | /* | |
838 | * Determine if this task needs to go to HEAD_OF_QUEUE for the | |
839 | * state list as well. Running with SAM Task Attribute emulation | |
840 | * will always return head_of_queue == 0 here | |
841 | */ | |
842 | if (head_of_queue) | |
843 | list_add(&task->t_state_list, (task_prev) ? | |
844 | &task_prev->t_state_list : | |
845 | &dev->state_task_list); | |
846 | else | |
847 | list_add_tail(&task->t_state_list, &dev->state_task_list); | |
848 | ||
1880807a | 849 | task->t_state_active = true; |
c66ac9db | 850 | |
6708bb27 | 851 | pr_debug("Added ITT: 0x%08x task[%p] to dev: %p\n", |
e3d6f909 | 852 | task->task_se_cmd->se_tfo->get_task_tag(task->task_se_cmd), |
c66ac9db NB |
853 | task, dev); |
854 | } | |
855 | ||
856 | static void transport_add_tasks_to_state_queue(struct se_cmd *cmd) | |
857 | { | |
42bf829e | 858 | struct se_device *dev = cmd->se_dev; |
c66ac9db NB |
859 | struct se_task *task; |
860 | unsigned long flags; | |
861 | ||
a1d8b49a AG |
862 | spin_lock_irqsave(&cmd->t_state_lock, flags); |
863 | list_for_each_entry(task, &cmd->t_task_list, t_list) { | |
c66ac9db | 864 | spin_lock(&dev->execute_task_lock); |
1880807a CH |
865 | if (!task->t_state_active) { |
866 | list_add_tail(&task->t_state_list, | |
867 | &dev->state_task_list); | |
868 | task->t_state_active = true; | |
869 | ||
870 | pr_debug("Added ITT: 0x%08x task[%p] to dev: %p\n", | |
871 | task->task_se_cmd->se_tfo->get_task_tag( | |
872 | task->task_se_cmd), task, dev); | |
873 | } | |
c66ac9db NB |
874 | spin_unlock(&dev->execute_task_lock); |
875 | } | |
a1d8b49a | 876 | spin_unlock_irqrestore(&cmd->t_state_lock, flags); |
c66ac9db NB |
877 | } |
878 | ||
4d2300cc | 879 | static void __transport_add_tasks_from_cmd(struct se_cmd *cmd) |
c66ac9db | 880 | { |
5951146d | 881 | struct se_device *dev = cmd->se_dev; |
c66ac9db | 882 | struct se_task *task, *task_prev = NULL; |
c66ac9db | 883 | |
a1d8b49a | 884 | list_for_each_entry(task, &cmd->t_task_list, t_list) { |
04629b7b | 885 | if (!list_empty(&task->t_execute_list)) |
c66ac9db NB |
886 | continue; |
887 | /* | |
888 | * __transport_add_task_to_execute_queue() handles the | |
889 | * SAM Task Attribute emulation if enabled | |
890 | */ | |
891 | __transport_add_task_to_execute_queue(task, task_prev, dev); | |
c66ac9db NB |
892 | task_prev = task; |
893 | } | |
4d2300cc NB |
894 | } |
895 | ||
896 | static void transport_add_tasks_from_cmd(struct se_cmd *cmd) | |
897 | { | |
898 | unsigned long flags; | |
899 | struct se_device *dev = cmd->se_dev; | |
900 | ||
901 | spin_lock_irqsave(&dev->execute_task_lock, flags); | |
902 | __transport_add_tasks_from_cmd(cmd); | |
c66ac9db | 903 | spin_unlock_irqrestore(&dev->execute_task_lock, flags); |
c66ac9db NB |
904 | } |
905 | ||
04629b7b CH |
906 | void __transport_remove_task_from_execute_queue(struct se_task *task, |
907 | struct se_device *dev) | |
908 | { | |
909 | list_del_init(&task->t_execute_list); | |
910 | atomic_dec(&dev->execute_tasks); | |
911 | } | |
912 | ||
e26d99ae | 913 | static void transport_remove_task_from_execute_queue( |
c66ac9db NB |
914 | struct se_task *task, |
915 | struct se_device *dev) | |
916 | { | |
917 | unsigned long flags; | |
918 | ||
04629b7b | 919 | if (WARN_ON(list_empty(&task->t_execute_list))) |
af57c3ac | 920 | return; |
af57c3ac | 921 | |
c66ac9db | 922 | spin_lock_irqsave(&dev->execute_task_lock, flags); |
04629b7b | 923 | __transport_remove_task_from_execute_queue(task, dev); |
c66ac9db NB |
924 | spin_unlock_irqrestore(&dev->execute_task_lock, flags); |
925 | } | |
926 | ||
07bde79a | 927 | /* |
f147abb4 | 928 | * Handle QUEUE_FULL / -EAGAIN and -ENOMEM status |
07bde79a NB |
929 | */ |
930 | ||
931 | static void target_qf_do_work(struct work_struct *work) | |
932 | { | |
933 | struct se_device *dev = container_of(work, struct se_device, | |
934 | qf_work_queue); | |
bcac364a | 935 | LIST_HEAD(qf_cmd_list); |
07bde79a NB |
936 | struct se_cmd *cmd, *cmd_tmp; |
937 | ||
938 | spin_lock_irq(&dev->qf_cmd_lock); | |
bcac364a RD |
939 | list_splice_init(&dev->qf_cmd_list, &qf_cmd_list); |
940 | spin_unlock_irq(&dev->qf_cmd_lock); | |
07bde79a | 941 | |
bcac364a | 942 | list_for_each_entry_safe(cmd, cmd_tmp, &qf_cmd_list, se_qf_node) { |
07bde79a NB |
943 | list_del(&cmd->se_qf_node); |
944 | atomic_dec(&dev->dev_qf_count); | |
945 | smp_mb__after_atomic_dec(); | |
07bde79a | 946 | |
6708bb27 | 947 | pr_debug("Processing %s cmd: %p QUEUE_FULL in work queue" |
07bde79a | 948 | " context: %s\n", cmd->se_tfo->get_fabric_name(), cmd, |
e057f533 | 949 | (cmd->t_state == TRANSPORT_COMPLETE_QF_OK) ? "COMPLETE_OK" : |
07bde79a NB |
950 | (cmd->t_state == TRANSPORT_COMPLETE_QF_WP) ? "WRITE_PENDING" |
951 | : "UNKNOWN"); | |
f7a5cc0b CH |
952 | |
953 | transport_add_cmd_to_queue(cmd, cmd->t_state, true); | |
07bde79a | 954 | } |
07bde79a NB |
955 | } |
956 | ||
c66ac9db NB |
957 | unsigned char *transport_dump_cmd_direction(struct se_cmd *cmd) |
958 | { | |
959 | switch (cmd->data_direction) { | |
960 | case DMA_NONE: | |
961 | return "NONE"; | |
962 | case DMA_FROM_DEVICE: | |
963 | return "READ"; | |
964 | case DMA_TO_DEVICE: | |
965 | return "WRITE"; | |
966 | case DMA_BIDIRECTIONAL: | |
967 | return "BIDI"; | |
968 | default: | |
969 | break; | |
970 | } | |
971 | ||
972 | return "UNKNOWN"; | |
973 | } | |
974 | ||
975 | void transport_dump_dev_state( | |
976 | struct se_device *dev, | |
977 | char *b, | |
978 | int *bl) | |
979 | { | |
980 | *bl += sprintf(b + *bl, "Status: "); | |
981 | switch (dev->dev_status) { | |
982 | case TRANSPORT_DEVICE_ACTIVATED: | |
983 | *bl += sprintf(b + *bl, "ACTIVATED"); | |
984 | break; | |
985 | case TRANSPORT_DEVICE_DEACTIVATED: | |
986 | *bl += sprintf(b + *bl, "DEACTIVATED"); | |
987 | break; | |
988 | case TRANSPORT_DEVICE_SHUTDOWN: | |
989 | *bl += sprintf(b + *bl, "SHUTDOWN"); | |
990 | break; | |
991 | case TRANSPORT_DEVICE_OFFLINE_ACTIVATED: | |
992 | case TRANSPORT_DEVICE_OFFLINE_DEACTIVATED: | |
993 | *bl += sprintf(b + *bl, "OFFLINE"); | |
994 | break; | |
995 | default: | |
996 | *bl += sprintf(b + *bl, "UNKNOWN=%d", dev->dev_status); | |
997 | break; | |
998 | } | |
999 | ||
65586d51 NB |
1000 | *bl += sprintf(b + *bl, " Execute/Max Queue Depth: %d/%d", |
1001 | atomic_read(&dev->execute_tasks), dev->queue_depth); | |
c66ac9db | 1002 | *bl += sprintf(b + *bl, " SectorSize: %u MaxSectors: %u\n", |
e3d6f909 | 1003 | dev->se_sub_dev->se_dev_attrib.block_size, dev->se_sub_dev->se_dev_attrib.max_sectors); |
c66ac9db NB |
1004 | *bl += sprintf(b + *bl, " "); |
1005 | } | |
1006 | ||
c66ac9db NB |
1007 | void transport_dump_vpd_proto_id( |
1008 | struct t10_vpd *vpd, | |
1009 | unsigned char *p_buf, | |
1010 | int p_buf_len) | |
1011 | { | |
1012 | unsigned char buf[VPD_TMP_BUF_SIZE]; | |
1013 | int len; | |
1014 | ||
1015 | memset(buf, 0, VPD_TMP_BUF_SIZE); | |
1016 | len = sprintf(buf, "T10 VPD Protocol Identifier: "); | |
1017 | ||
1018 | switch (vpd->protocol_identifier) { | |
1019 | case 0x00: | |
1020 | sprintf(buf+len, "Fibre Channel\n"); | |
1021 | break; | |
1022 | case 0x10: | |
1023 | sprintf(buf+len, "Parallel SCSI\n"); | |
1024 | break; | |
1025 | case 0x20: | |
1026 | sprintf(buf+len, "SSA\n"); | |
1027 | break; | |
1028 | case 0x30: | |
1029 | sprintf(buf+len, "IEEE 1394\n"); | |
1030 | break; | |
1031 | case 0x40: | |
1032 | sprintf(buf+len, "SCSI Remote Direct Memory Access" | |
1033 | " Protocol\n"); | |
1034 | break; | |
1035 | case 0x50: | |
1036 | sprintf(buf+len, "Internet SCSI (iSCSI)\n"); | |
1037 | break; | |
1038 | case 0x60: | |
1039 | sprintf(buf+len, "SAS Serial SCSI Protocol\n"); | |
1040 | break; | |
1041 | case 0x70: | |
1042 | sprintf(buf+len, "Automation/Drive Interface Transport" | |
1043 | " Protocol\n"); | |
1044 | break; | |
1045 | case 0x80: | |
1046 | sprintf(buf+len, "AT Attachment Interface ATA/ATAPI\n"); | |
1047 | break; | |
1048 | default: | |
1049 | sprintf(buf+len, "Unknown 0x%02x\n", | |
1050 | vpd->protocol_identifier); | |
1051 | break; | |
1052 | } | |
1053 | ||
1054 | if (p_buf) | |
1055 | strncpy(p_buf, buf, p_buf_len); | |
1056 | else | |
6708bb27 | 1057 | pr_debug("%s", buf); |
c66ac9db NB |
1058 | } |
1059 | ||
1060 | void | |
1061 | transport_set_vpd_proto_id(struct t10_vpd *vpd, unsigned char *page_83) | |
1062 | { | |
1063 | /* | |
1064 | * Check if the Protocol Identifier Valid (PIV) bit is set.. | |
1065 | * | |
1066 | * from spc3r23.pdf section 7.5.1 | |
1067 | */ | |
1068 | if (page_83[1] & 0x80) { | |
1069 | vpd->protocol_identifier = (page_83[0] & 0xf0); | |
1070 | vpd->protocol_identifier_set = 1; | |
1071 | transport_dump_vpd_proto_id(vpd, NULL, 0); | |
1072 | } | |
1073 | } | |
1074 | EXPORT_SYMBOL(transport_set_vpd_proto_id); | |
1075 | ||
1076 | int transport_dump_vpd_assoc( | |
1077 | struct t10_vpd *vpd, | |
1078 | unsigned char *p_buf, | |
1079 | int p_buf_len) | |
1080 | { | |
1081 | unsigned char buf[VPD_TMP_BUF_SIZE]; | |
e3d6f909 AG |
1082 | int ret = 0; |
1083 | int len; | |
c66ac9db NB |
1084 | |
1085 | memset(buf, 0, VPD_TMP_BUF_SIZE); | |
1086 | len = sprintf(buf, "T10 VPD Identifier Association: "); | |
1087 | ||
1088 | switch (vpd->association) { | |
1089 | case 0x00: | |
1090 | sprintf(buf+len, "addressed logical unit\n"); | |
1091 | break; | |
1092 | case 0x10: | |
1093 | sprintf(buf+len, "target port\n"); | |
1094 | break; | |
1095 | case 0x20: | |
1096 | sprintf(buf+len, "SCSI target device\n"); | |
1097 | break; | |
1098 | default: | |
1099 | sprintf(buf+len, "Unknown 0x%02x\n", vpd->association); | |
e3d6f909 | 1100 | ret = -EINVAL; |
c66ac9db NB |
1101 | break; |
1102 | } | |
1103 | ||
1104 | if (p_buf) | |
1105 | strncpy(p_buf, buf, p_buf_len); | |
1106 | else | |
6708bb27 | 1107 | pr_debug("%s", buf); |
c66ac9db NB |
1108 | |
1109 | return ret; | |
1110 | } | |
1111 | ||
1112 | int transport_set_vpd_assoc(struct t10_vpd *vpd, unsigned char *page_83) | |
1113 | { | |
1114 | /* | |
1115 | * The VPD identification association.. | |
1116 | * | |
1117 | * from spc3r23.pdf Section 7.6.3.1 Table 297 | |
1118 | */ | |
1119 | vpd->association = (page_83[1] & 0x30); | |
1120 | return transport_dump_vpd_assoc(vpd, NULL, 0); | |
1121 | } | |
1122 | EXPORT_SYMBOL(transport_set_vpd_assoc); | |
1123 | ||
1124 | int transport_dump_vpd_ident_type( | |
1125 | struct t10_vpd *vpd, | |
1126 | unsigned char *p_buf, | |
1127 | int p_buf_len) | |
1128 | { | |
1129 | unsigned char buf[VPD_TMP_BUF_SIZE]; | |
e3d6f909 AG |
1130 | int ret = 0; |
1131 | int len; | |
c66ac9db NB |
1132 | |
1133 | memset(buf, 0, VPD_TMP_BUF_SIZE); | |
1134 | len = sprintf(buf, "T10 VPD Identifier Type: "); | |
1135 | ||
1136 | switch (vpd->device_identifier_type) { | |
1137 | case 0x00: | |
1138 | sprintf(buf+len, "Vendor specific\n"); | |
1139 | break; | |
1140 | case 0x01: | |
1141 | sprintf(buf+len, "T10 Vendor ID based\n"); | |
1142 | break; | |
1143 | case 0x02: | |
1144 | sprintf(buf+len, "EUI-64 based\n"); | |
1145 | break; | |
1146 | case 0x03: | |
1147 | sprintf(buf+len, "NAA\n"); | |
1148 | break; | |
1149 | case 0x04: | |
1150 | sprintf(buf+len, "Relative target port identifier\n"); | |
1151 | break; | |
1152 | case 0x08: | |
1153 | sprintf(buf+len, "SCSI name string\n"); | |
1154 | break; | |
1155 | default: | |
1156 | sprintf(buf+len, "Unsupported: 0x%02x\n", | |
1157 | vpd->device_identifier_type); | |
e3d6f909 | 1158 | ret = -EINVAL; |
c66ac9db NB |
1159 | break; |
1160 | } | |
1161 | ||
e3d6f909 AG |
1162 | if (p_buf) { |
1163 | if (p_buf_len < strlen(buf)+1) | |
1164 | return -EINVAL; | |
c66ac9db | 1165 | strncpy(p_buf, buf, p_buf_len); |
e3d6f909 | 1166 | } else { |
6708bb27 | 1167 | pr_debug("%s", buf); |
e3d6f909 | 1168 | } |
c66ac9db NB |
1169 | |
1170 | return ret; | |
1171 | } | |
1172 | ||
1173 | int transport_set_vpd_ident_type(struct t10_vpd *vpd, unsigned char *page_83) | |
1174 | { | |
1175 | /* | |
1176 | * The VPD identifier type.. | |
1177 | * | |
1178 | * from spc3r23.pdf Section 7.6.3.1 Table 298 | |
1179 | */ | |
1180 | vpd->device_identifier_type = (page_83[1] & 0x0f); | |
1181 | return transport_dump_vpd_ident_type(vpd, NULL, 0); | |
1182 | } | |
1183 | EXPORT_SYMBOL(transport_set_vpd_ident_type); | |
1184 | ||
1185 | int transport_dump_vpd_ident( | |
1186 | struct t10_vpd *vpd, | |
1187 | unsigned char *p_buf, | |
1188 | int p_buf_len) | |
1189 | { | |
1190 | unsigned char buf[VPD_TMP_BUF_SIZE]; | |
1191 | int ret = 0; | |
1192 | ||
1193 | memset(buf, 0, VPD_TMP_BUF_SIZE); | |
1194 | ||
1195 | switch (vpd->device_identifier_code_set) { | |
1196 | case 0x01: /* Binary */ | |
1197 | sprintf(buf, "T10 VPD Binary Device Identifier: %s\n", | |
1198 | &vpd->device_identifier[0]); | |
1199 | break; | |
1200 | case 0x02: /* ASCII */ | |
1201 | sprintf(buf, "T10 VPD ASCII Device Identifier: %s\n", | |
1202 | &vpd->device_identifier[0]); | |
1203 | break; | |
1204 | case 0x03: /* UTF-8 */ | |
1205 | sprintf(buf, "T10 VPD UTF-8 Device Identifier: %s\n", | |
1206 | &vpd->device_identifier[0]); | |
1207 | break; | |
1208 | default: | |
1209 | sprintf(buf, "T10 VPD Device Identifier encoding unsupported:" | |
1210 | " 0x%02x", vpd->device_identifier_code_set); | |
e3d6f909 | 1211 | ret = -EINVAL; |
c66ac9db NB |
1212 | break; |
1213 | } | |
1214 | ||
1215 | if (p_buf) | |
1216 | strncpy(p_buf, buf, p_buf_len); | |
1217 | else | |
6708bb27 | 1218 | pr_debug("%s", buf); |
c66ac9db NB |
1219 | |
1220 | return ret; | |
1221 | } | |
1222 | ||
1223 | int | |
1224 | transport_set_vpd_ident(struct t10_vpd *vpd, unsigned char *page_83) | |
1225 | { | |
1226 | static const char hex_str[] = "0123456789abcdef"; | |
1227 | int j = 0, i = 4; /* offset to start of the identifer */ | |
1228 | ||
1229 | /* | |
1230 | * The VPD Code Set (encoding) | |
1231 | * | |
1232 | * from spc3r23.pdf Section 7.6.3.1 Table 296 | |
1233 | */ | |
1234 | vpd->device_identifier_code_set = (page_83[0] & 0x0f); | |
1235 | switch (vpd->device_identifier_code_set) { | |
1236 | case 0x01: /* Binary */ | |
1237 | vpd->device_identifier[j++] = | |
1238 | hex_str[vpd->device_identifier_type]; | |
1239 | while (i < (4 + page_83[3])) { | |
1240 | vpd->device_identifier[j++] = | |
1241 | hex_str[(page_83[i] & 0xf0) >> 4]; | |
1242 | vpd->device_identifier[j++] = | |
1243 | hex_str[page_83[i] & 0x0f]; | |
1244 | i++; | |
1245 | } | |
1246 | break; | |
1247 | case 0x02: /* ASCII */ | |
1248 | case 0x03: /* UTF-8 */ | |
1249 | while (i < (4 + page_83[3])) | |
1250 | vpd->device_identifier[j++] = page_83[i++]; | |
1251 | break; | |
1252 | default: | |
1253 | break; | |
1254 | } | |
1255 | ||
1256 | return transport_dump_vpd_ident(vpd, NULL, 0); | |
1257 | } | |
1258 | EXPORT_SYMBOL(transport_set_vpd_ident); | |
1259 | ||
1260 | static void core_setup_task_attr_emulation(struct se_device *dev) | |
1261 | { | |
1262 | /* | |
1263 | * If this device is from Target_Core_Mod/pSCSI, disable the | |
1264 | * SAM Task Attribute emulation. | |
1265 | * | |
1266 | * This is currently not available in upsream Linux/SCSI Target | |
1267 | * mode code, and is assumed to be disabled while using TCM/pSCSI. | |
1268 | */ | |
e3d6f909 | 1269 | if (dev->transport->transport_type == TRANSPORT_PLUGIN_PHBA_PDEV) { |
c66ac9db NB |
1270 | dev->dev_task_attr_type = SAM_TASK_ATTR_PASSTHROUGH; |
1271 | return; | |
1272 | } | |
1273 | ||
1274 | dev->dev_task_attr_type = SAM_TASK_ATTR_EMULATED; | |
6708bb27 | 1275 | pr_debug("%s: Using SAM_TASK_ATTR_EMULATED for SPC: 0x%02x" |
e3d6f909 AG |
1276 | " device\n", dev->transport->name, |
1277 | dev->transport->get_device_rev(dev)); | |
c66ac9db NB |
1278 | } |
1279 | ||
1280 | static void scsi_dump_inquiry(struct se_device *dev) | |
1281 | { | |
e3d6f909 | 1282 | struct t10_wwn *wwn = &dev->se_sub_dev->t10_wwn; |
e59a41b6 | 1283 | char buf[17]; |
c66ac9db NB |
1284 | int i, device_type; |
1285 | /* | |
1286 | * Print Linux/SCSI style INQUIRY formatting to the kernel ring buffer | |
1287 | */ | |
c66ac9db NB |
1288 | for (i = 0; i < 8; i++) |
1289 | if (wwn->vendor[i] >= 0x20) | |
e59a41b6 | 1290 | buf[i] = wwn->vendor[i]; |
c66ac9db | 1291 | else |
e59a41b6 SAS |
1292 | buf[i] = ' '; |
1293 | buf[i] = '\0'; | |
1294 | pr_debug(" Vendor: %s\n", buf); | |
c66ac9db | 1295 | |
c66ac9db NB |
1296 | for (i = 0; i < 16; i++) |
1297 | if (wwn->model[i] >= 0x20) | |
e59a41b6 | 1298 | buf[i] = wwn->model[i]; |
c66ac9db | 1299 | else |
e59a41b6 SAS |
1300 | buf[i] = ' '; |
1301 | buf[i] = '\0'; | |
1302 | pr_debug(" Model: %s\n", buf); | |
c66ac9db | 1303 | |
c66ac9db NB |
1304 | for (i = 0; i < 4; i++) |
1305 | if (wwn->revision[i] >= 0x20) | |
e59a41b6 | 1306 | buf[i] = wwn->revision[i]; |
c66ac9db | 1307 | else |
e59a41b6 SAS |
1308 | buf[i] = ' '; |
1309 | buf[i] = '\0'; | |
1310 | pr_debug(" Revision: %s\n", buf); | |
c66ac9db | 1311 | |
e3d6f909 | 1312 | device_type = dev->transport->get_device_type(dev); |
6708bb27 AG |
1313 | pr_debug(" Type: %s ", scsi_device_type(device_type)); |
1314 | pr_debug(" ANSI SCSI revision: %02x\n", | |
e3d6f909 | 1315 | dev->transport->get_device_rev(dev)); |
c66ac9db NB |
1316 | } |
1317 | ||
1318 | struct se_device *transport_add_device_to_core_hba( | |
1319 | struct se_hba *hba, | |
1320 | struct se_subsystem_api *transport, | |
1321 | struct se_subsystem_dev *se_dev, | |
1322 | u32 device_flags, | |
1323 | void *transport_dev, | |
1324 | struct se_dev_limits *dev_limits, | |
1325 | const char *inquiry_prod, | |
1326 | const char *inquiry_rev) | |
1327 | { | |
12a18bdc | 1328 | int force_pt; |
c66ac9db NB |
1329 | struct se_device *dev; |
1330 | ||
1331 | dev = kzalloc(sizeof(struct se_device), GFP_KERNEL); | |
6708bb27 AG |
1332 | if (!dev) { |
1333 | pr_err("Unable to allocate memory for se_dev_t\n"); | |
c66ac9db NB |
1334 | return NULL; |
1335 | } | |
c66ac9db | 1336 | |
e3d6f909 | 1337 | transport_init_queue_obj(&dev->dev_queue_obj); |
c66ac9db NB |
1338 | dev->dev_flags = device_flags; |
1339 | dev->dev_status |= TRANSPORT_DEVICE_DEACTIVATED; | |
5951146d | 1340 | dev->dev_ptr = transport_dev; |
c66ac9db NB |
1341 | dev->se_hba = hba; |
1342 | dev->se_sub_dev = se_dev; | |
1343 | dev->transport = transport; | |
c66ac9db NB |
1344 | INIT_LIST_HEAD(&dev->dev_list); |
1345 | INIT_LIST_HEAD(&dev->dev_sep_list); | |
1346 | INIT_LIST_HEAD(&dev->dev_tmr_list); | |
1347 | INIT_LIST_HEAD(&dev->execute_task_list); | |
1348 | INIT_LIST_HEAD(&dev->delayed_cmd_list); | |
c66ac9db | 1349 | INIT_LIST_HEAD(&dev->state_task_list); |
07bde79a | 1350 | INIT_LIST_HEAD(&dev->qf_cmd_list); |
c66ac9db NB |
1351 | spin_lock_init(&dev->execute_task_lock); |
1352 | spin_lock_init(&dev->delayed_cmd_lock); | |
c66ac9db NB |
1353 | spin_lock_init(&dev->dev_reservation_lock); |
1354 | spin_lock_init(&dev->dev_status_lock); | |
c66ac9db NB |
1355 | spin_lock_init(&dev->se_port_lock); |
1356 | spin_lock_init(&dev->se_tmr_lock); | |
07bde79a | 1357 | spin_lock_init(&dev->qf_cmd_lock); |
c66ac9db NB |
1358 | atomic_set(&dev->dev_ordered_id, 0); |
1359 | ||
1360 | se_dev_set_default_attribs(dev, dev_limits); | |
1361 | ||
1362 | dev->dev_index = scsi_get_new_index(SCSI_DEVICE_INDEX); | |
1363 | dev->creation_time = get_jiffies_64(); | |
1364 | spin_lock_init(&dev->stats_lock); | |
1365 | ||
1366 | spin_lock(&hba->device_lock); | |
1367 | list_add_tail(&dev->dev_list, &hba->hba_dev_list); | |
1368 | hba->dev_count++; | |
1369 | spin_unlock(&hba->device_lock); | |
1370 | /* | |
1371 | * Setup the SAM Task Attribute emulation for struct se_device | |
1372 | */ | |
1373 | core_setup_task_attr_emulation(dev); | |
1374 | /* | |
1375 | * Force PR and ALUA passthrough emulation with internal object use. | |
1376 | */ | |
1377 | force_pt = (hba->hba_flags & HBA_FLAGS_INTERNAL_USE); | |
1378 | /* | |
1379 | * Setup the Reservations infrastructure for struct se_device | |
1380 | */ | |
1381 | core_setup_reservations(dev, force_pt); | |
1382 | /* | |
1383 | * Setup the Asymmetric Logical Unit Assignment for struct se_device | |
1384 | */ | |
1385 | if (core_setup_alua(dev, force_pt) < 0) | |
1386 | goto out; | |
1387 | ||
1388 | /* | |
1389 | * Startup the struct se_device processing thread | |
1390 | */ | |
1391 | dev->process_thread = kthread_run(transport_processing_thread, dev, | |
e3d6f909 | 1392 | "LIO_%s", dev->transport->name); |
c66ac9db | 1393 | if (IS_ERR(dev->process_thread)) { |
6708bb27 | 1394 | pr_err("Unable to create kthread: LIO_%s\n", |
e3d6f909 | 1395 | dev->transport->name); |
c66ac9db NB |
1396 | goto out; |
1397 | } | |
07bde79a NB |
1398 | /* |
1399 | * Setup work_queue for QUEUE_FULL | |
1400 | */ | |
1401 | INIT_WORK(&dev->qf_work_queue, target_qf_do_work); | |
c66ac9db NB |
1402 | /* |
1403 | * Preload the initial INQUIRY const values if we are doing | |
1404 | * anything virtual (IBLOCK, FILEIO, RAMDISK), but not for TCM/pSCSI | |
1405 | * passthrough because this is being provided by the backend LLD. | |
1406 | * This is required so that transport_get_inquiry() copies these | |
1407 | * originals once back into DEV_T10_WWN(dev) for the virtual device | |
1408 | * setup. | |
1409 | */ | |
e3d6f909 | 1410 | if (dev->transport->transport_type != TRANSPORT_PLUGIN_PHBA_PDEV) { |
f22c1196 | 1411 | if (!inquiry_prod || !inquiry_rev) { |
6708bb27 | 1412 | pr_err("All non TCM/pSCSI plugins require" |
c66ac9db NB |
1413 | " INQUIRY consts\n"); |
1414 | goto out; | |
1415 | } | |
1416 | ||
e3d6f909 AG |
1417 | strncpy(&dev->se_sub_dev->t10_wwn.vendor[0], "LIO-ORG", 8); |
1418 | strncpy(&dev->se_sub_dev->t10_wwn.model[0], inquiry_prod, 16); | |
1419 | strncpy(&dev->se_sub_dev->t10_wwn.revision[0], inquiry_rev, 4); | |
c66ac9db NB |
1420 | } |
1421 | scsi_dump_inquiry(dev); | |
1422 | ||
12a18bdc | 1423 | return dev; |
c66ac9db | 1424 | out: |
c66ac9db NB |
1425 | kthread_stop(dev->process_thread); |
1426 | ||
1427 | spin_lock(&hba->device_lock); | |
1428 | list_del(&dev->dev_list); | |
1429 | hba->dev_count--; | |
1430 | spin_unlock(&hba->device_lock); | |
1431 | ||
1432 | se_release_vpd_for_dev(dev); | |
1433 | ||
c66ac9db NB |
1434 | kfree(dev); |
1435 | ||
1436 | return NULL; | |
1437 | } | |
1438 | EXPORT_SYMBOL(transport_add_device_to_core_hba); | |
1439 | ||
1440 | /* transport_generic_prepare_cdb(): | |
1441 | * | |
1442 | * Since the Initiator sees iSCSI devices as LUNs, the SCSI CDB will | |
1443 | * contain the iSCSI LUN in bits 7-5 of byte 1 as per SAM-2. | |
1444 | * The point of this is since we are mapping iSCSI LUNs to | |
1445 | * SCSI Target IDs having a non-zero LUN in the CDB will throw the | |
1446 | * devices and HBAs for a loop. | |
1447 | */ | |
1448 | static inline void transport_generic_prepare_cdb( | |
1449 | unsigned char *cdb) | |
1450 | { | |
1451 | switch (cdb[0]) { | |
1452 | case READ_10: /* SBC - RDProtect */ | |
1453 | case READ_12: /* SBC - RDProtect */ | |
1454 | case READ_16: /* SBC - RDProtect */ | |
1455 | case SEND_DIAGNOSTIC: /* SPC - SELF-TEST Code */ | |
1456 | case VERIFY: /* SBC - VRProtect */ | |
1457 | case VERIFY_16: /* SBC - VRProtect */ | |
1458 | case WRITE_VERIFY: /* SBC - VRProtect */ | |
1459 | case WRITE_VERIFY_12: /* SBC - VRProtect */ | |
1460 | break; | |
1461 | default: | |
1462 | cdb[1] &= 0x1f; /* clear logical unit number */ | |
1463 | break; | |
1464 | } | |
1465 | } | |
1466 | ||
1467 | static struct se_task * | |
1468 | transport_generic_get_task(struct se_cmd *cmd, | |
1469 | enum dma_data_direction data_direction) | |
1470 | { | |
1471 | struct se_task *task; | |
5951146d | 1472 | struct se_device *dev = cmd->se_dev; |
c66ac9db | 1473 | |
6708bb27 | 1474 | task = dev->transport->alloc_task(cmd->t_task_cdb); |
c66ac9db | 1475 | if (!task) { |
6708bb27 | 1476 | pr_err("Unable to allocate struct se_task\n"); |
c66ac9db NB |
1477 | return NULL; |
1478 | } | |
1479 | ||
1480 | INIT_LIST_HEAD(&task->t_list); | |
1481 | INIT_LIST_HEAD(&task->t_execute_list); | |
1482 | INIT_LIST_HEAD(&task->t_state_list); | |
1483 | init_completion(&task->task_stop_comp); | |
c66ac9db | 1484 | task->task_se_cmd = cmd; |
c66ac9db NB |
1485 | task->task_data_direction = data_direction; |
1486 | ||
c66ac9db NB |
1487 | return task; |
1488 | } | |
1489 | ||
1490 | static int transport_generic_cmd_sequencer(struct se_cmd *, unsigned char *); | |
1491 | ||
c66ac9db NB |
1492 | /* |
1493 | * Used by fabric modules containing a local struct se_cmd within their | |
1494 | * fabric dependent per I/O descriptor. | |
1495 | */ | |
1496 | void transport_init_se_cmd( | |
1497 | struct se_cmd *cmd, | |
1498 | struct target_core_fabric_ops *tfo, | |
1499 | struct se_session *se_sess, | |
1500 | u32 data_length, | |
1501 | int data_direction, | |
1502 | int task_attr, | |
1503 | unsigned char *sense_buffer) | |
1504 | { | |
5951146d AG |
1505 | INIT_LIST_HEAD(&cmd->se_lun_node); |
1506 | INIT_LIST_HEAD(&cmd->se_delayed_node); | |
07bde79a | 1507 | INIT_LIST_HEAD(&cmd->se_qf_node); |
79a7fef2 | 1508 | INIT_LIST_HEAD(&cmd->se_queue_node); |
a17f091d | 1509 | INIT_LIST_HEAD(&cmd->se_cmd_list); |
a1d8b49a AG |
1510 | INIT_LIST_HEAD(&cmd->t_task_list); |
1511 | init_completion(&cmd->transport_lun_fe_stop_comp); | |
1512 | init_completion(&cmd->transport_lun_stop_comp); | |
1513 | init_completion(&cmd->t_transport_stop_comp); | |
a17f091d | 1514 | init_completion(&cmd->cmd_wait_comp); |
a1d8b49a | 1515 | spin_lock_init(&cmd->t_state_lock); |
7d680f3b | 1516 | cmd->transport_state = CMD_T_DEV_ACTIVE; |
c66ac9db NB |
1517 | |
1518 | cmd->se_tfo = tfo; | |
1519 | cmd->se_sess = se_sess; | |
1520 | cmd->data_length = data_length; | |
1521 | cmd->data_direction = data_direction; | |
1522 | cmd->sam_task_attr = task_attr; | |
1523 | cmd->sense_buffer = sense_buffer; | |
1524 | } | |
1525 | EXPORT_SYMBOL(transport_init_se_cmd); | |
1526 | ||
1527 | static int transport_check_alloc_task_attr(struct se_cmd *cmd) | |
1528 | { | |
1529 | /* | |
1530 | * Check if SAM Task Attribute emulation is enabled for this | |
1531 | * struct se_device storage object | |
1532 | */ | |
5951146d | 1533 | if (cmd->se_dev->dev_task_attr_type != SAM_TASK_ATTR_EMULATED) |
c66ac9db NB |
1534 | return 0; |
1535 | ||
e66ecd50 | 1536 | if (cmd->sam_task_attr == MSG_ACA_TAG) { |
6708bb27 | 1537 | pr_debug("SAM Task Attribute ACA" |
c66ac9db | 1538 | " emulation is not supported\n"); |
e3d6f909 | 1539 | return -EINVAL; |
c66ac9db NB |
1540 | } |
1541 | /* | |
1542 | * Used to determine when ORDERED commands should go from | |
1543 | * Dormant to Active status. | |
1544 | */ | |
5951146d | 1545 | cmd->se_ordered_id = atomic_inc_return(&cmd->se_dev->dev_ordered_id); |
c66ac9db | 1546 | smp_mb__after_atomic_inc(); |
6708bb27 | 1547 | pr_debug("Allocated se_ordered_id: %u for Task Attr: 0x%02x on %s\n", |
c66ac9db | 1548 | cmd->se_ordered_id, cmd->sam_task_attr, |
6708bb27 | 1549 | cmd->se_dev->transport->name); |
c66ac9db NB |
1550 | return 0; |
1551 | } | |
1552 | ||
c66ac9db NB |
1553 | /* transport_generic_allocate_tasks(): |
1554 | * | |
1555 | * Called from fabric RX Thread. | |
1556 | */ | |
1557 | int transport_generic_allocate_tasks( | |
1558 | struct se_cmd *cmd, | |
1559 | unsigned char *cdb) | |
1560 | { | |
1561 | int ret; | |
1562 | ||
1563 | transport_generic_prepare_cdb(cdb); | |
c66ac9db NB |
1564 | /* |
1565 | * Ensure that the received CDB is less than the max (252 + 8) bytes | |
1566 | * for VARIABLE_LENGTH_CMD | |
1567 | */ | |
1568 | if (scsi_command_size(cdb) > SCSI_MAX_VARLEN_CDB_SIZE) { | |
6708bb27 | 1569 | pr_err("Received SCSI CDB with command_size: %d that" |
c66ac9db NB |
1570 | " exceeds SCSI_MAX_VARLEN_CDB_SIZE: %d\n", |
1571 | scsi_command_size(cdb), SCSI_MAX_VARLEN_CDB_SIZE); | |
03e98c9e NB |
1572 | cmd->se_cmd_flags |= SCF_SCSI_CDB_EXCEPTION; |
1573 | cmd->scsi_sense_reason = TCM_INVALID_CDB_FIELD; | |
e3d6f909 | 1574 | return -EINVAL; |
c66ac9db NB |
1575 | } |
1576 | /* | |
1577 | * If the received CDB is larger than TCM_MAX_COMMAND_SIZE, | |
1578 | * allocate the additional extended CDB buffer now.. Otherwise | |
1579 | * setup the pointer from __t_task_cdb to t_task_cdb. | |
1580 | */ | |
a1d8b49a AG |
1581 | if (scsi_command_size(cdb) > sizeof(cmd->__t_task_cdb)) { |
1582 | cmd->t_task_cdb = kzalloc(scsi_command_size(cdb), | |
c66ac9db | 1583 | GFP_KERNEL); |
6708bb27 AG |
1584 | if (!cmd->t_task_cdb) { |
1585 | pr_err("Unable to allocate cmd->t_task_cdb" | |
a1d8b49a | 1586 | " %u > sizeof(cmd->__t_task_cdb): %lu ops\n", |
c66ac9db | 1587 | scsi_command_size(cdb), |
a1d8b49a | 1588 | (unsigned long)sizeof(cmd->__t_task_cdb)); |
03e98c9e NB |
1589 | cmd->se_cmd_flags |= SCF_SCSI_CDB_EXCEPTION; |
1590 | cmd->scsi_sense_reason = | |
1591 | TCM_LOGICAL_UNIT_COMMUNICATION_FAILURE; | |
e3d6f909 | 1592 | return -ENOMEM; |
c66ac9db NB |
1593 | } |
1594 | } else | |
a1d8b49a | 1595 | cmd->t_task_cdb = &cmd->__t_task_cdb[0]; |
c66ac9db | 1596 | /* |
a1d8b49a | 1597 | * Copy the original CDB into cmd-> |
c66ac9db | 1598 | */ |
a1d8b49a | 1599 | memcpy(cmd->t_task_cdb, cdb, scsi_command_size(cdb)); |
c66ac9db NB |
1600 | /* |
1601 | * Setup the received CDB based on SCSI defined opcodes and | |
1602 | * perform unit attention, persistent reservations and ALUA | |
a1d8b49a | 1603 | * checks for virtual device backends. The cmd->t_task_cdb |
c66ac9db NB |
1604 | * pointer is expected to be setup before we reach this point. |
1605 | */ | |
1606 | ret = transport_generic_cmd_sequencer(cmd, cdb); | |
1607 | if (ret < 0) | |
1608 | return ret; | |
1609 | /* | |
1610 | * Check for SAM Task Attribute Emulation | |
1611 | */ | |
1612 | if (transport_check_alloc_task_attr(cmd) < 0) { | |
1613 | cmd->se_cmd_flags |= SCF_SCSI_CDB_EXCEPTION; | |
1614 | cmd->scsi_sense_reason = TCM_INVALID_CDB_FIELD; | |
5951146d | 1615 | return -EINVAL; |
c66ac9db NB |
1616 | } |
1617 | spin_lock(&cmd->se_lun->lun_sep_lock); | |
1618 | if (cmd->se_lun->lun_sep) | |
1619 | cmd->se_lun->lun_sep->sep_stats.cmd_pdus++; | |
1620 | spin_unlock(&cmd->se_lun->lun_sep_lock); | |
1621 | return 0; | |
1622 | } | |
1623 | EXPORT_SYMBOL(transport_generic_allocate_tasks); | |
1624 | ||
695434e1 NB |
1625 | /* |
1626 | * Used by fabric module frontends to queue tasks directly. | |
1627 | * Many only be used from process context only | |
1628 | */ | |
1629 | int transport_handle_cdb_direct( | |
1630 | struct se_cmd *cmd) | |
1631 | { | |
dd8ae59d NB |
1632 | int ret; |
1633 | ||
695434e1 NB |
1634 | if (!cmd->se_lun) { |
1635 | dump_stack(); | |
6708bb27 | 1636 | pr_err("cmd->se_lun is NULL\n"); |
695434e1 NB |
1637 | return -EINVAL; |
1638 | } | |
1639 | if (in_interrupt()) { | |
1640 | dump_stack(); | |
6708bb27 | 1641 | pr_err("transport_generic_handle_cdb cannot be called" |
695434e1 NB |
1642 | " from interrupt context\n"); |
1643 | return -EINVAL; | |
1644 | } | |
dd8ae59d | 1645 | /* |
7d680f3b | 1646 | * Set TRANSPORT_NEW_CMD state and CMD_T_ACTIVE following |
dd8ae59d NB |
1647 | * transport_generic_handle_cdb*() -> transport_add_cmd_to_queue() |
1648 | * in existing usage to ensure that outstanding descriptors are handled | |
d14921d6 | 1649 | * correctly during shutdown via transport_wait_for_tasks() |
dd8ae59d NB |
1650 | * |
1651 | * Also, we don't take cmd->t_state_lock here as we only expect | |
1652 | * this to be called for initial descriptor submission. | |
1653 | */ | |
1654 | cmd->t_state = TRANSPORT_NEW_CMD; | |
7d680f3b CH |
1655 | cmd->transport_state |= CMD_T_ACTIVE; |
1656 | ||
dd8ae59d NB |
1657 | /* |
1658 | * transport_generic_new_cmd() is already handling QUEUE_FULL, | |
1659 | * so follow TRANSPORT_NEW_CMD processing thread context usage | |
1660 | * and call transport_generic_request_failure() if necessary.. | |
1661 | */ | |
1662 | ret = transport_generic_new_cmd(cmd); | |
03e98c9e NB |
1663 | if (ret < 0) |
1664 | transport_generic_request_failure(cmd); | |
1665 | ||
dd8ae59d | 1666 | return 0; |
695434e1 NB |
1667 | } |
1668 | EXPORT_SYMBOL(transport_handle_cdb_direct); | |
1669 | ||
a6360785 NB |
1670 | /** |
1671 | * target_submit_cmd - lookup unpacked lun and submit uninitialized se_cmd | |
1672 | * | |
1673 | * @se_cmd: command descriptor to submit | |
1674 | * @se_sess: associated se_sess for endpoint | |
1675 | * @cdb: pointer to SCSI CDB | |
1676 | * @sense: pointer to SCSI sense buffer | |
1677 | * @unpacked_lun: unpacked LUN to reference for struct se_lun | |
1678 | * @data_length: fabric expected data transfer length | |
1679 | * @task_addr: SAM task attribute | |
1680 | * @data_dir: DMA data direction | |
1681 | * @flags: flags for command submission from target_sc_flags_tables | |
1682 | * | |
1683 | * This may only be called from process context, and also currently | |
1684 | * assumes internal allocation of fabric payload buffer by target-core. | |
1685 | **/ | |
1edcdb49 | 1686 | void target_submit_cmd(struct se_cmd *se_cmd, struct se_session *se_sess, |
a6360785 NB |
1687 | unsigned char *cdb, unsigned char *sense, u32 unpacked_lun, |
1688 | u32 data_length, int task_attr, int data_dir, int flags) | |
1689 | { | |
1690 | struct se_portal_group *se_tpg; | |
1691 | int rc; | |
1692 | ||
1693 | se_tpg = se_sess->se_tpg; | |
1694 | BUG_ON(!se_tpg); | |
1695 | BUG_ON(se_cmd->se_tfo || se_cmd->se_sess); | |
1696 | BUG_ON(in_interrupt()); | |
1697 | /* | |
1698 | * Initialize se_cmd for target operation. From this point | |
1699 | * exceptions are handled by sending exception status via | |
1700 | * target_core_fabric_ops->queue_status() callback | |
1701 | */ | |
1702 | transport_init_se_cmd(se_cmd, se_tpg->se_tpg_tfo, se_sess, | |
1703 | data_length, data_dir, task_attr, sense); | |
1704 | /* | |
1705 | * Obtain struct se_cmd->cmd_kref reference and add new cmd to | |
1706 | * se_sess->sess_cmd_list. A second kref_get here is necessary | |
1707 | * for fabrics using TARGET_SCF_ACK_KREF that expect a second | |
1708 | * kref_put() to happen during fabric packet acknowledgement. | |
1709 | */ | |
1710 | target_get_sess_cmd(se_sess, se_cmd, (flags & TARGET_SCF_ACK_KREF)); | |
1711 | /* | |
1712 | * Signal bidirectional data payloads to target-core | |
1713 | */ | |
1714 | if (flags & TARGET_SCF_BIDI_OP) | |
1715 | se_cmd->se_cmd_flags |= SCF_BIDI; | |
1716 | /* | |
1717 | * Locate se_lun pointer and attach it to struct se_cmd | |
1718 | */ | |
735703ca NB |
1719 | if (transport_lookup_cmd_lun(se_cmd, unpacked_lun) < 0) { |
1720 | transport_send_check_condition_and_sense(se_cmd, | |
1721 | se_cmd->scsi_sense_reason, 0); | |
1722 | target_put_sess_cmd(se_sess, se_cmd); | |
1723 | return; | |
1724 | } | |
a6360785 NB |
1725 | /* |
1726 | * Sanitize CDBs via transport_generic_cmd_sequencer() and | |
1727 | * allocate the necessary tasks to complete the received CDB+data | |
1728 | */ | |
1729 | rc = transport_generic_allocate_tasks(se_cmd, cdb); | |
735703ca NB |
1730 | if (rc != 0) { |
1731 | transport_generic_request_failure(se_cmd); | |
1732 | return; | |
1733 | } | |
a6360785 NB |
1734 | /* |
1735 | * Dispatch se_cmd descriptor to se_lun->lun_se_dev backend | |
1736 | * for immediate execution of READs, otherwise wait for | |
1737 | * transport_generic_handle_data() to be called for WRITEs | |
1738 | * when fabric has filled the incoming buffer. | |
1739 | */ | |
1740 | transport_handle_cdb_direct(se_cmd); | |
1edcdb49 | 1741 | return; |
a6360785 NB |
1742 | } |
1743 | EXPORT_SYMBOL(target_submit_cmd); | |
1744 | ||
9f0d05c2 NB |
1745 | static void target_complete_tmr_failure(struct work_struct *work) |
1746 | { | |
1747 | struct se_cmd *se_cmd = container_of(work, struct se_cmd, work); | |
1748 | ||
1749 | se_cmd->se_tmr_req->response = TMR_LUN_DOES_NOT_EXIST; | |
1750 | se_cmd->se_tfo->queue_tm_rsp(se_cmd); | |
1751 | transport_generic_free_cmd(se_cmd, 0); | |
1752 | } | |
1753 | ||
ea98d7f9 AG |
1754 | /** |
1755 | * target_submit_tmr - lookup unpacked lun and submit uninitialized se_cmd | |
1756 | * for TMR CDBs | |
1757 | * | |
1758 | * @se_cmd: command descriptor to submit | |
1759 | * @se_sess: associated se_sess for endpoint | |
1760 | * @sense: pointer to SCSI sense buffer | |
1761 | * @unpacked_lun: unpacked LUN to reference for struct se_lun | |
1762 | * @fabric_context: fabric context for TMR req | |
1763 | * @tm_type: Type of TM request | |
c0974f89 NB |
1764 | * @gfp: gfp type for caller |
1765 | * @tag: referenced task tag for TMR_ABORT_TASK | |
c7042cae | 1766 | * @flags: submit cmd flags |
ea98d7f9 AG |
1767 | * |
1768 | * Callable from all contexts. | |
1769 | **/ | |
1770 | ||
c7042cae | 1771 | int target_submit_tmr(struct se_cmd *se_cmd, struct se_session *se_sess, |
ea98d7f9 | 1772 | unsigned char *sense, u32 unpacked_lun, |
c0974f89 NB |
1773 | void *fabric_tmr_ptr, unsigned char tm_type, |
1774 | gfp_t gfp, unsigned int tag, int flags) | |
ea98d7f9 AG |
1775 | { |
1776 | struct se_portal_group *se_tpg; | |
1777 | int ret; | |
1778 | ||
1779 | se_tpg = se_sess->se_tpg; | |
1780 | BUG_ON(!se_tpg); | |
1781 | ||
1782 | transport_init_se_cmd(se_cmd, se_tpg->se_tpg_tfo, se_sess, | |
1783 | 0, DMA_NONE, MSG_SIMPLE_TAG, sense); | |
c7042cae NB |
1784 | /* |
1785 | * FIXME: Currently expect caller to handle se_cmd->se_tmr_req | |
1786 | * allocation failure. | |
1787 | */ | |
c0974f89 | 1788 | ret = core_tmr_alloc_req(se_cmd, fabric_tmr_ptr, tm_type, gfp); |
c7042cae NB |
1789 | if (ret < 0) |
1790 | return -ENOMEM; | |
ea98d7f9 | 1791 | |
c0974f89 NB |
1792 | if (tm_type == TMR_ABORT_TASK) |
1793 | se_cmd->se_tmr_req->ref_task_tag = tag; | |
1794 | ||
ea98d7f9 AG |
1795 | /* See target_submit_cmd for commentary */ |
1796 | target_get_sess_cmd(se_sess, se_cmd, (flags & TARGET_SCF_ACK_KREF)); | |
1797 | ||
ea98d7f9 AG |
1798 | ret = transport_lookup_tmr_lun(se_cmd, unpacked_lun); |
1799 | if (ret) { | |
9f0d05c2 NB |
1800 | /* |
1801 | * For callback during failure handling, push this work off | |
1802 | * to process context with TMR_LUN_DOES_NOT_EXIST status. | |
1803 | */ | |
1804 | INIT_WORK(&se_cmd->work, target_complete_tmr_failure); | |
1805 | schedule_work(&se_cmd->work); | |
c7042cae | 1806 | return 0; |
ea98d7f9 AG |
1807 | } |
1808 | transport_generic_handle_tmr(se_cmd); | |
c7042cae | 1809 | return 0; |
ea98d7f9 AG |
1810 | } |
1811 | EXPORT_SYMBOL(target_submit_tmr); | |
1812 | ||
c66ac9db NB |
1813 | /* |
1814 | * Used by fabric module frontends defining a TFO->new_cmd_map() caller | |
1815 | * to queue up a newly setup se_cmd w/ TRANSPORT_NEW_CMD_MAP in order to | |
1816 | * complete setup in TCM process context w/ TFO->new_cmd_map(). | |
1817 | */ | |
1818 | int transport_generic_handle_cdb_map( | |
1819 | struct se_cmd *cmd) | |
1820 | { | |
e3d6f909 | 1821 | if (!cmd->se_lun) { |
c66ac9db | 1822 | dump_stack(); |
6708bb27 | 1823 | pr_err("cmd->se_lun is NULL\n"); |
e3d6f909 | 1824 | return -EINVAL; |
c66ac9db NB |
1825 | } |
1826 | ||
f7a5cc0b | 1827 | transport_add_cmd_to_queue(cmd, TRANSPORT_NEW_CMD_MAP, false); |
c66ac9db NB |
1828 | return 0; |
1829 | } | |
1830 | EXPORT_SYMBOL(transport_generic_handle_cdb_map); | |
1831 | ||
1832 | /* transport_generic_handle_data(): | |
1833 | * | |
1834 | * | |
1835 | */ | |
1836 | int transport_generic_handle_data( | |
1837 | struct se_cmd *cmd) | |
1838 | { | |
1839 | /* | |
1840 | * For the software fabric case, then we assume the nexus is being | |
1841 | * failed/shutdown when signals are pending from the kthread context | |
1842 | * caller, so we return a failure. For the HW target mode case running | |
1843 | * in interrupt code, the signal_pending() check is skipped. | |
1844 | */ | |
1845 | if (!in_interrupt() && signal_pending(current)) | |
e3d6f909 | 1846 | return -EPERM; |
c66ac9db NB |
1847 | /* |
1848 | * If the received CDB has aleady been ABORTED by the generic | |
1849 | * target engine, we now call transport_check_aborted_status() | |
1850 | * to queue any delated TASK_ABORTED status for the received CDB to the | |
25985edc | 1851 | * fabric module as we are expecting no further incoming DATA OUT |
c66ac9db NB |
1852 | * sequences at this point. |
1853 | */ | |
1854 | if (transport_check_aborted_status(cmd, 1) != 0) | |
1855 | return 0; | |
1856 | ||
f7a5cc0b | 1857 | transport_add_cmd_to_queue(cmd, TRANSPORT_PROCESS_WRITE, false); |
c66ac9db NB |
1858 | return 0; |
1859 | } | |
1860 | EXPORT_SYMBOL(transport_generic_handle_data); | |
1861 | ||
1862 | /* transport_generic_handle_tmr(): | |
1863 | * | |
1864 | * | |
1865 | */ | |
1866 | int transport_generic_handle_tmr( | |
1867 | struct se_cmd *cmd) | |
1868 | { | |
f7a5cc0b | 1869 | transport_add_cmd_to_queue(cmd, TRANSPORT_PROCESS_TMR, false); |
c66ac9db NB |
1870 | return 0; |
1871 | } | |
1872 | EXPORT_SYMBOL(transport_generic_handle_tmr); | |
1873 | ||
cdbb70bb CH |
1874 | /* |
1875 | * If the task is active, request it to be stopped and sleep until it | |
1876 | * has completed. | |
1877 | */ | |
1878 | bool target_stop_task(struct se_task *task, unsigned long *flags) | |
1879 | { | |
1880 | struct se_cmd *cmd = task->task_se_cmd; | |
1881 | bool was_active = false; | |
1882 | ||
1883 | if (task->task_flags & TF_ACTIVE) { | |
1884 | task->task_flags |= TF_REQUEST_STOP; | |
1885 | spin_unlock_irqrestore(&cmd->t_state_lock, *flags); | |
1886 | ||
1887 | pr_debug("Task %p waiting to complete\n", task); | |
1888 | wait_for_completion(&task->task_stop_comp); | |
1889 | pr_debug("Task %p stopped successfully\n", task); | |
1890 | ||
1891 | spin_lock_irqsave(&cmd->t_state_lock, *flags); | |
1892 | atomic_dec(&cmd->t_task_cdbs_left); | |
1893 | task->task_flags &= ~(TF_ACTIVE | TF_REQUEST_STOP); | |
1894 | was_active = true; | |
1895 | } | |
1896 | ||
cdbb70bb CH |
1897 | return was_active; |
1898 | } | |
1899 | ||
c66ac9db NB |
1900 | static int transport_stop_tasks_for_cmd(struct se_cmd *cmd) |
1901 | { | |
1902 | struct se_task *task, *task_tmp; | |
1903 | unsigned long flags; | |
1904 | int ret = 0; | |
1905 | ||
6708bb27 | 1906 | pr_debug("ITT[0x%08x] - Stopping tasks\n", |
e3d6f909 | 1907 | cmd->se_tfo->get_task_tag(cmd)); |
c66ac9db NB |
1908 | |
1909 | /* | |
1910 | * No tasks remain in the execution queue | |
1911 | */ | |
a1d8b49a | 1912 | spin_lock_irqsave(&cmd->t_state_lock, flags); |
c66ac9db | 1913 | list_for_each_entry_safe(task, task_tmp, |
a1d8b49a | 1914 | &cmd->t_task_list, t_list) { |
04629b7b | 1915 | pr_debug("Processing task %p\n", task); |
c66ac9db NB |
1916 | /* |
1917 | * If the struct se_task has not been sent and is not active, | |
1918 | * remove the struct se_task from the execution queue. | |
1919 | */ | |
6c76bf95 | 1920 | if (!(task->task_flags & (TF_ACTIVE | TF_SENT))) { |
a1d8b49a | 1921 | spin_unlock_irqrestore(&cmd->t_state_lock, |
c66ac9db NB |
1922 | flags); |
1923 | transport_remove_task_from_execute_queue(task, | |
42bf829e | 1924 | cmd->se_dev); |
c66ac9db | 1925 | |
04629b7b | 1926 | pr_debug("Task %p removed from execute queue\n", task); |
a1d8b49a | 1927 | spin_lock_irqsave(&cmd->t_state_lock, flags); |
c66ac9db NB |
1928 | continue; |
1929 | } | |
1930 | ||
cdbb70bb | 1931 | if (!target_stop_task(task, &flags)) { |
04629b7b | 1932 | pr_debug("Task %p - did nothing\n", task); |
c66ac9db NB |
1933 | ret++; |
1934 | } | |
c66ac9db | 1935 | } |
a1d8b49a | 1936 | spin_unlock_irqrestore(&cmd->t_state_lock, flags); |
c66ac9db NB |
1937 | |
1938 | return ret; | |
1939 | } | |
1940 | ||
c66ac9db NB |
1941 | /* |
1942 | * Handle SAM-esque emulation for generic transport request failures. | |
1943 | */ | |
2fbff127 | 1944 | void transport_generic_request_failure(struct se_cmd *cmd) |
c66ac9db | 1945 | { |
07bde79a NB |
1946 | int ret = 0; |
1947 | ||
6708bb27 | 1948 | pr_debug("-----[ Storage Engine Exception for cmd: %p ITT: 0x%08x" |
e3d6f909 | 1949 | " CDB: 0x%02x\n", cmd, cmd->se_tfo->get_task_tag(cmd), |
a1d8b49a | 1950 | cmd->t_task_cdb[0]); |
03e98c9e | 1951 | pr_debug("-----[ i_state: %d t_state: %d scsi_sense_reason: %d\n", |
e3d6f909 | 1952 | cmd->se_tfo->get_cmd_state(cmd), |
03e98c9e | 1953 | cmd->t_state, cmd->scsi_sense_reason); |
6708bb27 | 1954 | pr_debug("-----[ t_tasks: %d t_task_cdbs_left: %d" |
c66ac9db | 1955 | " t_task_cdbs_sent: %d t_task_cdbs_ex_left: %d --" |
7d680f3b CH |
1956 | " CMD_T_ACTIVE: %d CMD_T_STOP: %d CMD_T_SENT: %d\n", |
1957 | cmd->t_task_list_num, | |
a1d8b49a AG |
1958 | atomic_read(&cmd->t_task_cdbs_left), |
1959 | atomic_read(&cmd->t_task_cdbs_sent), | |
1960 | atomic_read(&cmd->t_task_cdbs_ex_left), | |
7d680f3b CH |
1961 | (cmd->transport_state & CMD_T_ACTIVE) != 0, |
1962 | (cmd->transport_state & CMD_T_STOP) != 0, | |
1963 | (cmd->transport_state & CMD_T_SENT) != 0); | |
c66ac9db | 1964 | |
c66ac9db NB |
1965 | /* |
1966 | * For SAM Task Attribute emulation for failed struct se_cmd | |
1967 | */ | |
1968 | if (cmd->se_dev->dev_task_attr_type == SAM_TASK_ATTR_EMULATED) | |
1969 | transport_complete_task_attr(cmd); | |
1970 | ||
03e98c9e NB |
1971 | switch (cmd->scsi_sense_reason) { |
1972 | case TCM_NON_EXISTENT_LUN: | |
1973 | case TCM_UNSUPPORTED_SCSI_OPCODE: | |
1974 | case TCM_INVALID_CDB_FIELD: | |
1975 | case TCM_INVALID_PARAMETER_LIST: | |
1976 | case TCM_LOGICAL_UNIT_COMMUNICATION_FAILURE: | |
1977 | case TCM_UNKNOWN_MODE_PAGE: | |
1978 | case TCM_WRITE_PROTECTED: | |
1979 | case TCM_CHECK_CONDITION_ABORT_CMD: | |
1980 | case TCM_CHECK_CONDITION_UNIT_ATTENTION: | |
1981 | case TCM_CHECK_CONDITION_NOT_READY: | |
c66ac9db | 1982 | break; |
03e98c9e | 1983 | case TCM_RESERVATION_CONFLICT: |
c66ac9db NB |
1984 | /* |
1985 | * No SENSE Data payload for this case, set SCSI Status | |
1986 | * and queue the response to $FABRIC_MOD. | |
1987 | * | |
1988 | * Uses linux/include/scsi/scsi.h SAM status codes defs | |
1989 | */ | |
1990 | cmd->scsi_status = SAM_STAT_RESERVATION_CONFLICT; | |
1991 | /* | |
1992 | * For UA Interlock Code 11b, a RESERVATION CONFLICT will | |
1993 | * establish a UNIT ATTENTION with PREVIOUS RESERVATION | |
1994 | * CONFLICT STATUS. | |
1995 | * | |
1996 | * See spc4r17, section 7.4.6 Control Mode Page, Table 349 | |
1997 | */ | |
e3d6f909 AG |
1998 | if (cmd->se_sess && |
1999 | cmd->se_dev->se_sub_dev->se_dev_attrib.emulate_ua_intlck_ctrl == 2) | |
2000 | core_scsi3_ua_allocate(cmd->se_sess->se_node_acl, | |
c66ac9db NB |
2001 | cmd->orig_fe_lun, 0x2C, |
2002 | ASCQ_2CH_PREVIOUS_RESERVATION_CONFLICT_STATUS); | |
2003 | ||
07bde79a | 2004 | ret = cmd->se_tfo->queue_status(cmd); |
f147abb4 | 2005 | if (ret == -EAGAIN || ret == -ENOMEM) |
07bde79a | 2006 | goto queue_full; |
c66ac9db | 2007 | goto check_stop; |
c66ac9db | 2008 | default: |
6708bb27 | 2009 | pr_err("Unknown transport error for CDB 0x%02x: %d\n", |
03e98c9e | 2010 | cmd->t_task_cdb[0], cmd->scsi_sense_reason); |
c66ac9db NB |
2011 | cmd->scsi_sense_reason = TCM_UNSUPPORTED_SCSI_OPCODE; |
2012 | break; | |
2013 | } | |
16ab8e60 NB |
2014 | /* |
2015 | * If a fabric does not define a cmd->se_tfo->new_cmd_map caller, | |
2016 | * make the call to transport_send_check_condition_and_sense() | |
2017 | * directly. Otherwise expect the fabric to make the call to | |
2018 | * transport_send_check_condition_and_sense() after handling | |
2019 | * possible unsoliticied write data payloads. | |
2020 | */ | |
03e98c9e NB |
2021 | ret = transport_send_check_condition_and_sense(cmd, |
2022 | cmd->scsi_sense_reason, 0); | |
2023 | if (ret == -EAGAIN || ret == -ENOMEM) | |
2024 | goto queue_full; | |
07bde79a | 2025 | |
c66ac9db NB |
2026 | check_stop: |
2027 | transport_lun_remove_cmd(cmd); | |
6708bb27 | 2028 | if (!transport_cmd_check_stop_to_fabric(cmd)) |
c66ac9db | 2029 | ; |
07bde79a NB |
2030 | return; |
2031 | ||
2032 | queue_full: | |
e057f533 CH |
2033 | cmd->t_state = TRANSPORT_COMPLETE_QF_OK; |
2034 | transport_handle_queue_full(cmd, cmd->se_dev); | |
c66ac9db | 2035 | } |
2fbff127 | 2036 | EXPORT_SYMBOL(transport_generic_request_failure); |
c66ac9db | 2037 | |
c66ac9db NB |
2038 | static inline u32 transport_lba_21(unsigned char *cdb) |
2039 | { | |
2040 | return ((cdb[1] & 0x1f) << 16) | (cdb[2] << 8) | cdb[3]; | |
2041 | } | |
2042 | ||
2043 | static inline u32 transport_lba_32(unsigned char *cdb) | |
2044 | { | |
2045 | return (cdb[2] << 24) | (cdb[3] << 16) | (cdb[4] << 8) | cdb[5]; | |
2046 | } | |
2047 | ||
2048 | static inline unsigned long long transport_lba_64(unsigned char *cdb) | |
2049 | { | |
2050 | unsigned int __v1, __v2; | |
2051 | ||
2052 | __v1 = (cdb[2] << 24) | (cdb[3] << 16) | (cdb[4] << 8) | cdb[5]; | |
2053 | __v2 = (cdb[6] << 24) | (cdb[7] << 16) | (cdb[8] << 8) | cdb[9]; | |
2054 | ||
2055 | return ((unsigned long long)__v2) | (unsigned long long)__v1 << 32; | |
2056 | } | |
2057 | ||
2058 | /* | |
2059 | * For VARIABLE_LENGTH_CDB w/ 32 byte extended CDBs | |
2060 | */ | |
2061 | static inline unsigned long long transport_lba_64_ext(unsigned char *cdb) | |
2062 | { | |
2063 | unsigned int __v1, __v2; | |
2064 | ||
2065 | __v1 = (cdb[12] << 24) | (cdb[13] << 16) | (cdb[14] << 8) | cdb[15]; | |
2066 | __v2 = (cdb[16] << 24) | (cdb[17] << 16) | (cdb[18] << 8) | cdb[19]; | |
2067 | ||
2068 | return ((unsigned long long)__v2) | (unsigned long long)__v1 << 32; | |
2069 | } | |
2070 | ||
2071 | static void transport_set_supported_SAM_opcode(struct se_cmd *se_cmd) | |
2072 | { | |
2073 | unsigned long flags; | |
2074 | ||
a1d8b49a | 2075 | spin_lock_irqsave(&se_cmd->t_state_lock, flags); |
c66ac9db | 2076 | se_cmd->se_cmd_flags |= SCF_SUPPORTED_SAM_OPCODE; |
a1d8b49a | 2077 | spin_unlock_irqrestore(&se_cmd->t_state_lock, flags); |
c66ac9db NB |
2078 | } |
2079 | ||
c66ac9db NB |
2080 | /* |
2081 | * Called from Fabric Module context from transport_execute_tasks() | |
2082 | * | |
2083 | * The return of this function determins if the tasks from struct se_cmd | |
2084 | * get added to the execution queue in transport_execute_tasks(), | |
2085 | * or are added to the delayed or ordered lists here. | |
2086 | */ | |
2087 | static inline int transport_execute_task_attr(struct se_cmd *cmd) | |
2088 | { | |
5951146d | 2089 | if (cmd->se_dev->dev_task_attr_type != SAM_TASK_ATTR_EMULATED) |
c66ac9db NB |
2090 | return 1; |
2091 | /* | |
25985edc | 2092 | * Check for the existence of HEAD_OF_QUEUE, and if true return 1 |
c66ac9db NB |
2093 | * to allow the passed struct se_cmd list of tasks to the front of the list. |
2094 | */ | |
e66ecd50 | 2095 | if (cmd->sam_task_attr == MSG_HEAD_TAG) { |
6708bb27 | 2096 | pr_debug("Added HEAD_OF_QUEUE for CDB:" |
c66ac9db | 2097 | " 0x%02x, se_ordered_id: %u\n", |
6708bb27 | 2098 | cmd->t_task_cdb[0], |
c66ac9db NB |
2099 | cmd->se_ordered_id); |
2100 | return 1; | |
e66ecd50 | 2101 | } else if (cmd->sam_task_attr == MSG_ORDERED_TAG) { |
5951146d | 2102 | atomic_inc(&cmd->se_dev->dev_ordered_sync); |
c66ac9db NB |
2103 | smp_mb__after_atomic_inc(); |
2104 | ||
6708bb27 | 2105 | pr_debug("Added ORDERED for CDB: 0x%02x to ordered" |
c66ac9db | 2106 | " list, se_ordered_id: %u\n", |
a1d8b49a | 2107 | cmd->t_task_cdb[0], |
c66ac9db NB |
2108 | cmd->se_ordered_id); |
2109 | /* | |
2110 | * Add ORDERED command to tail of execution queue if | |
2111 | * no other older commands exist that need to be | |
2112 | * completed first. | |
2113 | */ | |
6708bb27 | 2114 | if (!atomic_read(&cmd->se_dev->simple_cmds)) |
c66ac9db NB |
2115 | return 1; |
2116 | } else { | |
2117 | /* | |
2118 | * For SIMPLE and UNTAGGED Task Attribute commands | |
2119 | */ | |
5951146d | 2120 | atomic_inc(&cmd->se_dev->simple_cmds); |
c66ac9db NB |
2121 | smp_mb__after_atomic_inc(); |
2122 | } | |
2123 | /* | |
2124 | * Otherwise if one or more outstanding ORDERED task attribute exist, | |
2125 | * add the dormant task(s) built for the passed struct se_cmd to the | |
2126 | * execution queue and become in Active state for this struct se_device. | |
2127 | */ | |
5951146d | 2128 | if (atomic_read(&cmd->se_dev->dev_ordered_sync) != 0) { |
c66ac9db NB |
2129 | /* |
2130 | * Otherwise, add cmd w/ tasks to delayed cmd queue that | |
25985edc | 2131 | * will be drained upon completion of HEAD_OF_QUEUE task. |
c66ac9db | 2132 | */ |
5951146d | 2133 | spin_lock(&cmd->se_dev->delayed_cmd_lock); |
c66ac9db | 2134 | cmd->se_cmd_flags |= SCF_DELAYED_CMD_FROM_SAM_ATTR; |
5951146d AG |
2135 | list_add_tail(&cmd->se_delayed_node, |
2136 | &cmd->se_dev->delayed_cmd_list); | |
2137 | spin_unlock(&cmd->se_dev->delayed_cmd_lock); | |
c66ac9db | 2138 | |
6708bb27 | 2139 | pr_debug("Added CDB: 0x%02x Task Attr: 0x%02x to" |
c66ac9db | 2140 | " delayed CMD list, se_ordered_id: %u\n", |
a1d8b49a | 2141 | cmd->t_task_cdb[0], cmd->sam_task_attr, |
c66ac9db NB |
2142 | cmd->se_ordered_id); |
2143 | /* | |
2144 | * Return zero to let transport_execute_tasks() know | |
2145 | * not to add the delayed tasks to the execution list. | |
2146 | */ | |
2147 | return 0; | |
2148 | } | |
2149 | /* | |
2150 | * Otherwise, no ORDERED task attributes exist.. | |
2151 | */ | |
2152 | return 1; | |
2153 | } | |
2154 | ||
2155 | /* | |
2156 | * Called from fabric module context in transport_generic_new_cmd() and | |
2157 | * transport_generic_process_write() | |
2158 | */ | |
2159 | static int transport_execute_tasks(struct se_cmd *cmd) | |
2160 | { | |
2161 | int add_tasks; | |
40be67f4 | 2162 | struct se_device *se_dev = cmd->se_dev; |
c66ac9db NB |
2163 | /* |
2164 | * Call transport_cmd_check_stop() to see if a fabric exception | |
25985edc | 2165 | * has occurred that prevents execution. |
c66ac9db | 2166 | */ |
6708bb27 | 2167 | if (!transport_cmd_check_stop(cmd, 0, TRANSPORT_PROCESSING)) { |
c66ac9db NB |
2168 | /* |
2169 | * Check for SAM Task Attribute emulation and HEAD_OF_QUEUE | |
2170 | * attribute for the tasks of the received struct se_cmd CDB | |
2171 | */ | |
2172 | add_tasks = transport_execute_task_attr(cmd); | |
e3d6f909 | 2173 | if (!add_tasks) |
c66ac9db NB |
2174 | goto execute_tasks; |
2175 | /* | |
4d2300cc NB |
2176 | * __transport_execute_tasks() -> __transport_add_tasks_from_cmd() |
2177 | * adds associated se_tasks while holding dev->execute_task_lock | |
2178 | * before I/O dispath to avoid a double spinlock access. | |
c66ac9db | 2179 | */ |
4d2300cc NB |
2180 | __transport_execute_tasks(se_dev, cmd); |
2181 | return 0; | |
c66ac9db | 2182 | } |
4d2300cc | 2183 | |
c66ac9db | 2184 | execute_tasks: |
4d2300cc | 2185 | __transport_execute_tasks(se_dev, NULL); |
c66ac9db NB |
2186 | return 0; |
2187 | } | |
2188 | ||
2189 | /* | |
2190 | * Called to check struct se_device tcq depth window, and once open pull struct se_task | |
2191 | * from struct se_device->execute_task_list and | |
2192 | * | |
2193 | * Called from transport_processing_thread() | |
2194 | */ | |
4d2300cc | 2195 | static int __transport_execute_tasks(struct se_device *dev, struct se_cmd *new_cmd) |
c66ac9db NB |
2196 | { |
2197 | int error; | |
2198 | struct se_cmd *cmd = NULL; | |
e3d6f909 | 2199 | struct se_task *task = NULL; |
c66ac9db NB |
2200 | unsigned long flags; |
2201 | ||
c66ac9db | 2202 | check_depth: |
e3d6f909 | 2203 | spin_lock_irq(&dev->execute_task_lock); |
4d2300cc NB |
2204 | if (new_cmd != NULL) |
2205 | __transport_add_tasks_from_cmd(new_cmd); | |
2206 | ||
e3d6f909 AG |
2207 | if (list_empty(&dev->execute_task_list)) { |
2208 | spin_unlock_irq(&dev->execute_task_lock); | |
c66ac9db NB |
2209 | return 0; |
2210 | } | |
e3d6f909 AG |
2211 | task = list_first_entry(&dev->execute_task_list, |
2212 | struct se_task, t_execute_list); | |
04629b7b | 2213 | __transport_remove_task_from_execute_queue(task, dev); |
e3d6f909 | 2214 | spin_unlock_irq(&dev->execute_task_lock); |
c66ac9db | 2215 | |
e3d6f909 | 2216 | cmd = task->task_se_cmd; |
a1d8b49a | 2217 | spin_lock_irqsave(&cmd->t_state_lock, flags); |
6c76bf95 | 2218 | task->task_flags |= (TF_ACTIVE | TF_SENT); |
a1d8b49a | 2219 | atomic_inc(&cmd->t_task_cdbs_sent); |
c66ac9db | 2220 | |
a1d8b49a AG |
2221 | if (atomic_read(&cmd->t_task_cdbs_sent) == |
2222 | cmd->t_task_list_num) | |
7d680f3b | 2223 | cmd->transport_state |= CMD_T_SENT; |
c66ac9db | 2224 | |
a1d8b49a | 2225 | spin_unlock_irqrestore(&cmd->t_state_lock, flags); |
c66ac9db | 2226 | |
5bda90c8 CH |
2227 | if (cmd->execute_task) |
2228 | error = cmd->execute_task(task); | |
2229 | else | |
2230 | error = dev->transport->do_task(task); | |
d29a5b6a | 2231 | if (error != 0) { |
d29a5b6a CH |
2232 | spin_lock_irqsave(&cmd->t_state_lock, flags); |
2233 | task->task_flags &= ~TF_ACTIVE; | |
7d680f3b | 2234 | cmd->transport_state &= ~CMD_T_SENT; |
d29a5b6a | 2235 | spin_unlock_irqrestore(&cmd->t_state_lock, flags); |
7d680f3b | 2236 | |
d29a5b6a | 2237 | transport_stop_tasks_for_cmd(cmd); |
03e98c9e | 2238 | transport_generic_request_failure(cmd); |
c66ac9db NB |
2239 | } |
2240 | ||
4d2300cc | 2241 | new_cmd = NULL; |
c66ac9db NB |
2242 | goto check_depth; |
2243 | ||
2244 | return 0; | |
2245 | } | |
2246 | ||
c66ac9db NB |
2247 | static inline u32 transport_get_sectors_6( |
2248 | unsigned char *cdb, | |
2249 | struct se_cmd *cmd, | |
2250 | int *ret) | |
2251 | { | |
5951146d | 2252 | struct se_device *dev = cmd->se_dev; |
c66ac9db NB |
2253 | |
2254 | /* | |
2255 | * Assume TYPE_DISK for non struct se_device objects. | |
2256 | * Use 8-bit sector value. | |
2257 | */ | |
2258 | if (!dev) | |
2259 | goto type_disk; | |
2260 | ||
2261 | /* | |
2262 | * Use 24-bit allocation length for TYPE_TAPE. | |
2263 | */ | |
e3d6f909 | 2264 | if (dev->transport->get_device_type(dev) == TYPE_TAPE) |
c66ac9db NB |
2265 | return (u32)(cdb[2] << 16) + (cdb[3] << 8) + cdb[4]; |
2266 | ||
2267 | /* | |
2268 | * Everything else assume TYPE_DISK Sector CDB location. | |
9b5cd7f3 RD |
2269 | * Use 8-bit sector value. SBC-3 says: |
2270 | * | |
2271 | * A TRANSFER LENGTH field set to zero specifies that 256 | |
2272 | * logical blocks shall be written. Any other value | |
2273 | * specifies the number of logical blocks that shall be | |
2274 | * written. | |
c66ac9db NB |
2275 | */ |
2276 | type_disk: | |
9b5cd7f3 | 2277 | return cdb[4] ? : 256; |
c66ac9db NB |
2278 | } |
2279 | ||
2280 | static inline u32 transport_get_sectors_10( | |
2281 | unsigned char *cdb, | |
2282 | struct se_cmd *cmd, | |
2283 | int *ret) | |
2284 | { | |
5951146d | 2285 | struct se_device *dev = cmd->se_dev; |
c66ac9db NB |
2286 | |
2287 | /* | |
2288 | * Assume TYPE_DISK for non struct se_device objects. | |
2289 | * Use 16-bit sector value. | |
2290 | */ | |
2291 | if (!dev) | |
2292 | goto type_disk; | |
2293 | ||
2294 | /* | |
2295 | * XXX_10 is not defined in SSC, throw an exception | |
2296 | */ | |
e3d6f909 AG |
2297 | if (dev->transport->get_device_type(dev) == TYPE_TAPE) { |
2298 | *ret = -EINVAL; | |
c66ac9db NB |
2299 | return 0; |
2300 | } | |
2301 | ||
2302 | /* | |
2303 | * Everything else assume TYPE_DISK Sector CDB location. | |
2304 | * Use 16-bit sector value. | |
2305 | */ | |
2306 | type_disk: | |
2307 | return (u32)(cdb[7] << 8) + cdb[8]; | |
2308 | } | |
2309 | ||
2310 | static inline u32 transport_get_sectors_12( | |
2311 | unsigned char *cdb, | |
2312 | struct se_cmd *cmd, | |
2313 | int *ret) | |
2314 | { | |
5951146d | 2315 | struct se_device *dev = cmd->se_dev; |
c66ac9db NB |
2316 | |
2317 | /* | |
2318 | * Assume TYPE_DISK for non struct se_device objects. | |
2319 | * Use 32-bit sector value. | |
2320 | */ | |
2321 | if (!dev) | |
2322 | goto type_disk; | |
2323 | ||
2324 | /* | |
2325 | * XXX_12 is not defined in SSC, throw an exception | |
2326 | */ | |
e3d6f909 AG |
2327 | if (dev->transport->get_device_type(dev) == TYPE_TAPE) { |
2328 | *ret = -EINVAL; | |
c66ac9db NB |
2329 | return 0; |
2330 | } | |
2331 | ||
2332 | /* | |
2333 | * Everything else assume TYPE_DISK Sector CDB location. | |
2334 | * Use 32-bit sector value. | |
2335 | */ | |
2336 | type_disk: | |
2337 | return (u32)(cdb[6] << 24) + (cdb[7] << 16) + (cdb[8] << 8) + cdb[9]; | |
2338 | } | |
2339 | ||
2340 | static inline u32 transport_get_sectors_16( | |
2341 | unsigned char *cdb, | |
2342 | struct se_cmd *cmd, | |
2343 | int *ret) | |
2344 | { | |
5951146d | 2345 | struct se_device *dev = cmd->se_dev; |
c66ac9db NB |
2346 | |
2347 | /* | |
2348 | * Assume TYPE_DISK for non struct se_device objects. | |
2349 | * Use 32-bit sector value. | |
2350 | */ | |
2351 | if (!dev) | |
2352 | goto type_disk; | |
2353 | ||
2354 | /* | |
2355 | * Use 24-bit allocation length for TYPE_TAPE. | |
2356 | */ | |
e3d6f909 | 2357 | if (dev->transport->get_device_type(dev) == TYPE_TAPE) |
c66ac9db NB |
2358 | return (u32)(cdb[12] << 16) + (cdb[13] << 8) + cdb[14]; |
2359 | ||
2360 | type_disk: | |
2361 | return (u32)(cdb[10] << 24) + (cdb[11] << 16) + | |
2362 | (cdb[12] << 8) + cdb[13]; | |
2363 | } | |
2364 | ||
2365 | /* | |
2366 | * Used for VARIABLE_LENGTH_CDB WRITE_32 and READ_32 variants | |
2367 | */ | |
2368 | static inline u32 transport_get_sectors_32( | |
2369 | unsigned char *cdb, | |
2370 | struct se_cmd *cmd, | |
2371 | int *ret) | |
2372 | { | |
2373 | /* | |
2374 | * Assume TYPE_DISK for non struct se_device objects. | |
2375 | * Use 32-bit sector value. | |
2376 | */ | |
2377 | return (u32)(cdb[28] << 24) + (cdb[29] << 16) + | |
2378 | (cdb[30] << 8) + cdb[31]; | |
2379 | ||
2380 | } | |
2381 | ||
2382 | static inline u32 transport_get_size( | |
2383 | u32 sectors, | |
2384 | unsigned char *cdb, | |
2385 | struct se_cmd *cmd) | |
2386 | { | |
5951146d | 2387 | struct se_device *dev = cmd->se_dev; |
c66ac9db | 2388 | |
e3d6f909 | 2389 | if (dev->transport->get_device_type(dev) == TYPE_TAPE) { |
c66ac9db | 2390 | if (cdb[1] & 1) { /* sectors */ |
e3d6f909 | 2391 | return dev->se_sub_dev->se_dev_attrib.block_size * sectors; |
c66ac9db NB |
2392 | } else /* bytes */ |
2393 | return sectors; | |
2394 | } | |
2395 | #if 0 | |
6708bb27 | 2396 | pr_debug("Returning block_size: %u, sectors: %u == %u for" |
e3d6f909 AG |
2397 | " %s object\n", dev->se_sub_dev->se_dev_attrib.block_size, sectors, |
2398 | dev->se_sub_dev->se_dev_attrib.block_size * sectors, | |
2399 | dev->transport->name); | |
c66ac9db | 2400 | #endif |
e3d6f909 | 2401 | return dev->se_sub_dev->se_dev_attrib.block_size * sectors; |
c66ac9db NB |
2402 | } |
2403 | ||
c66ac9db NB |
2404 | static void transport_xor_callback(struct se_cmd *cmd) |
2405 | { | |
2406 | unsigned char *buf, *addr; | |
ec98f782 | 2407 | struct scatterlist *sg; |
c66ac9db NB |
2408 | unsigned int offset; |
2409 | int i; | |
ec98f782 | 2410 | int count; |
c66ac9db NB |
2411 | /* |
2412 | * From sbc3r22.pdf section 5.48 XDWRITEREAD (10) command | |
2413 | * | |
2414 | * 1) read the specified logical block(s); | |
2415 | * 2) transfer logical blocks from the data-out buffer; | |
2416 | * 3) XOR the logical blocks transferred from the data-out buffer with | |
2417 | * the logical blocks read, storing the resulting XOR data in a buffer; | |
2418 | * 4) if the DISABLE WRITE bit is set to zero, then write the logical | |
2419 | * blocks transferred from the data-out buffer; and | |
2420 | * 5) transfer the resulting XOR data to the data-in buffer. | |
2421 | */ | |
2422 | buf = kmalloc(cmd->data_length, GFP_KERNEL); | |
6708bb27 AG |
2423 | if (!buf) { |
2424 | pr_err("Unable to allocate xor_callback buf\n"); | |
c66ac9db NB |
2425 | return; |
2426 | } | |
2427 | /* | |
ec98f782 | 2428 | * Copy the scatterlist WRITE buffer located at cmd->t_data_sg |
c66ac9db NB |
2429 | * into the locally allocated *buf |
2430 | */ | |
ec98f782 AG |
2431 | sg_copy_to_buffer(cmd->t_data_sg, |
2432 | cmd->t_data_nents, | |
2433 | buf, | |
2434 | cmd->data_length); | |
2435 | ||
c66ac9db NB |
2436 | /* |
2437 | * Now perform the XOR against the BIDI read memory located at | |
a1d8b49a | 2438 | * cmd->t_mem_bidi_list |
c66ac9db NB |
2439 | */ |
2440 | ||
2441 | offset = 0; | |
ec98f782 | 2442 | for_each_sg(cmd->t_bidi_data_sg, sg, cmd->t_bidi_data_nents, count) { |
ca747d61 | 2443 | addr = kmap_atomic(sg_page(sg)); |
ec98f782 | 2444 | if (!addr) |
c66ac9db NB |
2445 | goto out; |
2446 | ||
ec98f782 AG |
2447 | for (i = 0; i < sg->length; i++) |
2448 | *(addr + sg->offset + i) ^= *(buf + offset + i); | |
c66ac9db | 2449 | |
ec98f782 | 2450 | offset += sg->length; |
ca747d61 | 2451 | kunmap_atomic(addr); |
c66ac9db | 2452 | } |
ec98f782 | 2453 | |
c66ac9db NB |
2454 | out: |
2455 | kfree(buf); | |
2456 | } | |
2457 | ||
2458 | /* | |
2459 | * Used to obtain Sense Data from underlying Linux/SCSI struct scsi_cmnd | |
2460 | */ | |
2461 | static int transport_get_sense_data(struct se_cmd *cmd) | |
2462 | { | |
2463 | unsigned char *buffer = cmd->sense_buffer, *sense_buffer = NULL; | |
42bf829e | 2464 | struct se_device *dev = cmd->se_dev; |
c66ac9db NB |
2465 | struct se_task *task = NULL, *task_tmp; |
2466 | unsigned long flags; | |
2467 | u32 offset = 0; | |
2468 | ||
e3d6f909 AG |
2469 | WARN_ON(!cmd->se_lun); |
2470 | ||
42bf829e CH |
2471 | if (!dev) |
2472 | return 0; | |
2473 | ||
a1d8b49a | 2474 | spin_lock_irqsave(&cmd->t_state_lock, flags); |
c66ac9db | 2475 | if (cmd->se_cmd_flags & SCF_SENT_CHECK_CONDITION) { |
a1d8b49a | 2476 | spin_unlock_irqrestore(&cmd->t_state_lock, flags); |
c66ac9db NB |
2477 | return 0; |
2478 | } | |
2479 | ||
2480 | list_for_each_entry_safe(task, task_tmp, | |
a1d8b49a | 2481 | &cmd->t_task_list, t_list) { |
ef804a84 | 2482 | if (!(task->task_flags & TF_HAS_SENSE)) |
c66ac9db NB |
2483 | continue; |
2484 | ||
e3d6f909 | 2485 | if (!dev->transport->get_sense_buffer) { |
6708bb27 | 2486 | pr_err("dev->transport->get_sense_buffer" |
c66ac9db NB |
2487 | " is NULL\n"); |
2488 | continue; | |
2489 | } | |
2490 | ||
e3d6f909 | 2491 | sense_buffer = dev->transport->get_sense_buffer(task); |
6708bb27 | 2492 | if (!sense_buffer) { |
04629b7b | 2493 | pr_err("ITT[0x%08x]_TASK[%p]: Unable to locate" |
c66ac9db | 2494 | " sense buffer for task with sense\n", |
04629b7b | 2495 | cmd->se_tfo->get_task_tag(cmd), task); |
c66ac9db NB |
2496 | continue; |
2497 | } | |
a1d8b49a | 2498 | spin_unlock_irqrestore(&cmd->t_state_lock, flags); |
c66ac9db | 2499 | |
e3d6f909 | 2500 | offset = cmd->se_tfo->set_fabric_sense_len(cmd, |
c66ac9db NB |
2501 | TRANSPORT_SENSE_BUFFER); |
2502 | ||
5951146d | 2503 | memcpy(&buffer[offset], sense_buffer, |
c66ac9db NB |
2504 | TRANSPORT_SENSE_BUFFER); |
2505 | cmd->scsi_status = task->task_scsi_status; | |
2506 | /* Automatically padded */ | |
2507 | cmd->scsi_sense_length = | |
2508 | (TRANSPORT_SENSE_BUFFER + offset); | |
2509 | ||
6708bb27 | 2510 | pr_debug("HBA_[%u]_PLUG[%s]: Set SAM STATUS: 0x%02x" |
c66ac9db | 2511 | " and sense\n", |
e3d6f909 | 2512 | dev->se_hba->hba_id, dev->transport->name, |
c66ac9db NB |
2513 | cmd->scsi_status); |
2514 | return 0; | |
2515 | } | |
a1d8b49a | 2516 | spin_unlock_irqrestore(&cmd->t_state_lock, flags); |
c66ac9db NB |
2517 | |
2518 | return -1; | |
2519 | } | |
2520 | ||
ec98f782 AG |
2521 | static inline long long transport_dev_end_lba(struct se_device *dev) |
2522 | { | |
2523 | return dev->transport->get_blocks(dev) + 1; | |
2524 | } | |
2525 | ||
2526 | static int transport_cmd_get_valid_sectors(struct se_cmd *cmd) | |
2527 | { | |
2528 | struct se_device *dev = cmd->se_dev; | |
2529 | u32 sectors; | |
2530 | ||
2531 | if (dev->transport->get_device_type(dev) != TYPE_DISK) | |
2532 | return 0; | |
2533 | ||
2534 | sectors = (cmd->data_length / dev->se_sub_dev->se_dev_attrib.block_size); | |
2535 | ||
6708bb27 AG |
2536 | if ((cmd->t_task_lba + sectors) > transport_dev_end_lba(dev)) { |
2537 | pr_err("LBA: %llu Sectors: %u exceeds" | |
ec98f782 AG |
2538 | " transport_dev_end_lba(): %llu\n", |
2539 | cmd->t_task_lba, sectors, | |
2540 | transport_dev_end_lba(dev)); | |
7abbe7f3 | 2541 | return -EINVAL; |
ec98f782 AG |
2542 | } |
2543 | ||
7abbe7f3 | 2544 | return 0; |
ec98f782 AG |
2545 | } |
2546 | ||
706d5860 NB |
2547 | static int target_check_write_same_discard(unsigned char *flags, struct se_device *dev) |
2548 | { | |
2549 | /* | |
2550 | * Determine if the received WRITE_SAME is used to for direct | |
2551 | * passthrough into Linux/SCSI with struct request via TCM/pSCSI | |
2552 | * or we are signaling the use of internal WRITE_SAME + UNMAP=1 | |
2553 | * emulation for -> Linux/BLOCK disbard with TCM/IBLOCK code. | |
2554 | */ | |
2555 | int passthrough = (dev->transport->transport_type == | |
2556 | TRANSPORT_PLUGIN_PHBA_PDEV); | |
2557 | ||
2558 | if (!passthrough) { | |
2559 | if ((flags[0] & 0x04) || (flags[0] & 0x02)) { | |
2560 | pr_err("WRITE_SAME PBDATA and LBDATA" | |
2561 | " bits not supported for Block Discard" | |
2562 | " Emulation\n"); | |
2563 | return -ENOSYS; | |
2564 | } | |
2565 | /* | |
2566 | * Currently for the emulated case we only accept | |
2567 | * tpws with the UNMAP=1 bit set. | |
2568 | */ | |
2569 | if (!(flags[0] & 0x08)) { | |
2570 | pr_err("WRITE_SAME w/o UNMAP bit not" | |
2571 | " supported for Block Discard Emulation\n"); | |
2572 | return -ENOSYS; | |
2573 | } | |
2574 | } | |
2575 | ||
2576 | return 0; | |
2577 | } | |
2578 | ||
c66ac9db NB |
2579 | /* transport_generic_cmd_sequencer(): |
2580 | * | |
2581 | * Generic Command Sequencer that should work for most DAS transport | |
2582 | * drivers. | |
2583 | * | |
2584 | * Called from transport_generic_allocate_tasks() in the $FABRIC_MOD | |
2585 | * RX Thread. | |
2586 | * | |
2587 | * FIXME: Need to support other SCSI OPCODES where as well. | |
2588 | */ | |
2589 | static int transport_generic_cmd_sequencer( | |
2590 | struct se_cmd *cmd, | |
2591 | unsigned char *cdb) | |
2592 | { | |
5951146d | 2593 | struct se_device *dev = cmd->se_dev; |
c66ac9db NB |
2594 | struct se_subsystem_dev *su_dev = dev->se_sub_dev; |
2595 | int ret = 0, sector_ret = 0, passthrough; | |
2596 | u32 sectors = 0, size = 0, pr_reg_type = 0; | |
2597 | u16 service_action; | |
2598 | u8 alua_ascq = 0; | |
2599 | /* | |
2600 | * Check for an existing UNIT ATTENTION condition | |
2601 | */ | |
2602 | if (core_scsi3_ua_check(cmd, cdb) < 0) { | |
c66ac9db NB |
2603 | cmd->se_cmd_flags |= SCF_SCSI_CDB_EXCEPTION; |
2604 | cmd->scsi_sense_reason = TCM_CHECK_CONDITION_UNIT_ATTENTION; | |
5951146d | 2605 | return -EINVAL; |
c66ac9db NB |
2606 | } |
2607 | /* | |
2608 | * Check status of Asymmetric Logical Unit Assignment port | |
2609 | */ | |
e3d6f909 | 2610 | ret = su_dev->t10_alua.alua_state_check(cmd, cdb, &alua_ascq); |
c66ac9db | 2611 | if (ret != 0) { |
c66ac9db | 2612 | /* |
25985edc | 2613 | * Set SCSI additional sense code (ASC) to 'LUN Not Accessible'; |
c66ac9db NB |
2614 | * The ALUA additional sense code qualifier (ASCQ) is determined |
2615 | * by the ALUA primary or secondary access state.. | |
2616 | */ | |
2617 | if (ret > 0) { | |
2618 | #if 0 | |
6708bb27 | 2619 | pr_debug("[%s]: ALUA TG Port not available," |
c66ac9db | 2620 | " SenseKey: NOT_READY, ASC/ASCQ: 0x04/0x%02x\n", |
e3d6f909 | 2621 | cmd->se_tfo->get_fabric_name(), alua_ascq); |
c66ac9db NB |
2622 | #endif |
2623 | transport_set_sense_codes(cmd, 0x04, alua_ascq); | |
2624 | cmd->se_cmd_flags |= SCF_SCSI_CDB_EXCEPTION; | |
2625 | cmd->scsi_sense_reason = TCM_CHECK_CONDITION_NOT_READY; | |
5951146d | 2626 | return -EINVAL; |
c66ac9db NB |
2627 | } |
2628 | goto out_invalid_cdb_field; | |
2629 | } | |
2630 | /* | |
2631 | * Check status for SPC-3 Persistent Reservations | |
2632 | */ | |
e3d6f909 AG |
2633 | if (su_dev->t10_pr.pr_ops.t10_reservation_check(cmd, &pr_reg_type) != 0) { |
2634 | if (su_dev->t10_pr.pr_ops.t10_seq_non_holder( | |
03e98c9e NB |
2635 | cmd, cdb, pr_reg_type) != 0) { |
2636 | cmd->se_cmd_flags |= SCF_SCSI_CDB_EXCEPTION; | |
2637 | cmd->se_cmd_flags |= SCF_SCSI_RESERVATION_CONFLICT; | |
087a03b3 | 2638 | cmd->scsi_status = SAM_STAT_RESERVATION_CONFLICT; |
03e98c9e NB |
2639 | cmd->scsi_sense_reason = TCM_RESERVATION_CONFLICT; |
2640 | return -EBUSY; | |
2641 | } | |
c66ac9db NB |
2642 | /* |
2643 | * This means the CDB is allowed for the SCSI Initiator port | |
2644 | * when said port is *NOT* holding the legacy SPC-2 or | |
2645 | * SPC-3 Persistent Reservation. | |
2646 | */ | |
2647 | } | |
2648 | ||
5bda90c8 CH |
2649 | /* |
2650 | * If we operate in passthrough mode we skip most CDB emulation and | |
2651 | * instead hand the commands down to the physical SCSI device. | |
2652 | */ | |
2653 | passthrough = | |
2654 | (dev->transport->transport_type == TRANSPORT_PLUGIN_PHBA_PDEV); | |
2655 | ||
c66ac9db NB |
2656 | switch (cdb[0]) { |
2657 | case READ_6: | |
2658 | sectors = transport_get_sectors_6(cdb, cmd, §or_ret); | |
2659 | if (sector_ret) | |
2660 | goto out_unsupported_cdb; | |
2661 | size = transport_get_size(sectors, cdb, cmd); | |
a1d8b49a | 2662 | cmd->t_task_lba = transport_lba_21(cdb); |
c66ac9db NB |
2663 | cmd->se_cmd_flags |= SCF_SCSI_DATA_SG_IO_CDB; |
2664 | break; | |
2665 | case READ_10: | |
2666 | sectors = transport_get_sectors_10(cdb, cmd, §or_ret); | |
2667 | if (sector_ret) | |
2668 | goto out_unsupported_cdb; | |
2669 | size = transport_get_size(sectors, cdb, cmd); | |
a1d8b49a | 2670 | cmd->t_task_lba = transport_lba_32(cdb); |
c66ac9db NB |
2671 | cmd->se_cmd_flags |= SCF_SCSI_DATA_SG_IO_CDB; |
2672 | break; | |
2673 | case READ_12: | |
2674 | sectors = transport_get_sectors_12(cdb, cmd, §or_ret); | |
2675 | if (sector_ret) | |
2676 | goto out_unsupported_cdb; | |
2677 | size = transport_get_size(sectors, cdb, cmd); | |
a1d8b49a | 2678 | cmd->t_task_lba = transport_lba_32(cdb); |
c66ac9db NB |
2679 | cmd->se_cmd_flags |= SCF_SCSI_DATA_SG_IO_CDB; |
2680 | break; | |
2681 | case READ_16: | |
2682 | sectors = transport_get_sectors_16(cdb, cmd, §or_ret); | |
2683 | if (sector_ret) | |
2684 | goto out_unsupported_cdb; | |
2685 | size = transport_get_size(sectors, cdb, cmd); | |
a1d8b49a | 2686 | cmd->t_task_lba = transport_lba_64(cdb); |
c66ac9db NB |
2687 | cmd->se_cmd_flags |= SCF_SCSI_DATA_SG_IO_CDB; |
2688 | break; | |
2689 | case WRITE_6: | |
2690 | sectors = transport_get_sectors_6(cdb, cmd, §or_ret); | |
2691 | if (sector_ret) | |
2692 | goto out_unsupported_cdb; | |
2693 | size = transport_get_size(sectors, cdb, cmd); | |
a1d8b49a | 2694 | cmd->t_task_lba = transport_lba_21(cdb); |
c66ac9db NB |
2695 | cmd->se_cmd_flags |= SCF_SCSI_DATA_SG_IO_CDB; |
2696 | break; | |
2697 | case WRITE_10: | |
2698 | sectors = transport_get_sectors_10(cdb, cmd, §or_ret); | |
2699 | if (sector_ret) | |
2700 | goto out_unsupported_cdb; | |
2701 | size = transport_get_size(sectors, cdb, cmd); | |
a1d8b49a | 2702 | cmd->t_task_lba = transport_lba_32(cdb); |
2d3a4b51 CH |
2703 | if (cdb[1] & 0x8) |
2704 | cmd->se_cmd_flags |= SCF_FUA; | |
c66ac9db NB |
2705 | cmd->se_cmd_flags |= SCF_SCSI_DATA_SG_IO_CDB; |
2706 | break; | |
2707 | case WRITE_12: | |
2708 | sectors = transport_get_sectors_12(cdb, cmd, §or_ret); | |
2709 | if (sector_ret) | |
2710 | goto out_unsupported_cdb; | |
2711 | size = transport_get_size(sectors, cdb, cmd); | |
a1d8b49a | 2712 | cmd->t_task_lba = transport_lba_32(cdb); |
2d3a4b51 CH |
2713 | if (cdb[1] & 0x8) |
2714 | cmd->se_cmd_flags |= SCF_FUA; | |
c66ac9db NB |
2715 | cmd->se_cmd_flags |= SCF_SCSI_DATA_SG_IO_CDB; |
2716 | break; | |
2717 | case WRITE_16: | |
2718 | sectors = transport_get_sectors_16(cdb, cmd, §or_ret); | |
2719 | if (sector_ret) | |
2720 | goto out_unsupported_cdb; | |
2721 | size = transport_get_size(sectors, cdb, cmd); | |
a1d8b49a | 2722 | cmd->t_task_lba = transport_lba_64(cdb); |
2d3a4b51 CH |
2723 | if (cdb[1] & 0x8) |
2724 | cmd->se_cmd_flags |= SCF_FUA; | |
c66ac9db NB |
2725 | cmd->se_cmd_flags |= SCF_SCSI_DATA_SG_IO_CDB; |
2726 | break; | |
2727 | case XDWRITEREAD_10: | |
2728 | if ((cmd->data_direction != DMA_TO_DEVICE) || | |
33c3fafc | 2729 | !(cmd->se_cmd_flags & SCF_BIDI)) |
c66ac9db NB |
2730 | goto out_invalid_cdb_field; |
2731 | sectors = transport_get_sectors_10(cdb, cmd, §or_ret); | |
2732 | if (sector_ret) | |
2733 | goto out_unsupported_cdb; | |
2734 | size = transport_get_size(sectors, cdb, cmd); | |
a1d8b49a | 2735 | cmd->t_task_lba = transport_lba_32(cdb); |
c66ac9db | 2736 | cmd->se_cmd_flags |= SCF_SCSI_DATA_SG_IO_CDB; |
7c1c6af3 | 2737 | |
5bda90c8 CH |
2738 | /* |
2739 | * Do now allow BIDI commands for passthrough mode. | |
2740 | */ | |
2741 | if (passthrough) | |
7c1c6af3 | 2742 | goto out_unsupported_cdb; |
5bda90c8 | 2743 | |
c66ac9db | 2744 | /* |
35e0e757 | 2745 | * Setup BIDI XOR callback to be run after I/O completion. |
c66ac9db NB |
2746 | */ |
2747 | cmd->transport_complete_callback = &transport_xor_callback; | |
2d3a4b51 CH |
2748 | if (cdb[1] & 0x8) |
2749 | cmd->se_cmd_flags |= SCF_FUA; | |
c66ac9db NB |
2750 | break; |
2751 | case VARIABLE_LENGTH_CMD: | |
2752 | service_action = get_unaligned_be16(&cdb[8]); | |
c66ac9db NB |
2753 | switch (service_action) { |
2754 | case XDWRITEREAD_32: | |
2755 | sectors = transport_get_sectors_32(cdb, cmd, §or_ret); | |
2756 | if (sector_ret) | |
2757 | goto out_unsupported_cdb; | |
2758 | size = transport_get_size(sectors, cdb, cmd); | |
2759 | /* | |
2760 | * Use WRITE_32 and READ_32 opcodes for the emulated | |
2761 | * XDWRITE_READ_32 logic. | |
2762 | */ | |
a1d8b49a | 2763 | cmd->t_task_lba = transport_lba_64_ext(cdb); |
c66ac9db NB |
2764 | cmd->se_cmd_flags |= SCF_SCSI_DATA_SG_IO_CDB; |
2765 | ||
5bda90c8 CH |
2766 | /* |
2767 | * Do now allow BIDI commands for passthrough mode. | |
2768 | */ | |
c66ac9db | 2769 | if (passthrough) |
7c1c6af3 | 2770 | goto out_unsupported_cdb; |
5bda90c8 | 2771 | |
c66ac9db | 2772 | /* |
35e0e757 CH |
2773 | * Setup BIDI XOR callback to be run during after I/O |
2774 | * completion. | |
c66ac9db NB |
2775 | */ |
2776 | cmd->transport_complete_callback = &transport_xor_callback; | |
2d3a4b51 CH |
2777 | if (cdb[1] & 0x8) |
2778 | cmd->se_cmd_flags |= SCF_FUA; | |
c66ac9db NB |
2779 | break; |
2780 | case WRITE_SAME_32: | |
2781 | sectors = transport_get_sectors_32(cdb, cmd, §or_ret); | |
2782 | if (sector_ret) | |
2783 | goto out_unsupported_cdb; | |
dd3a5ad8 | 2784 | |
6708bb27 | 2785 | if (sectors) |
12850626 | 2786 | size = transport_get_size(1, cdb, cmd); |
6708bb27 AG |
2787 | else { |
2788 | pr_err("WSNZ=1, WRITE_SAME w/sectors=0 not" | |
2789 | " supported\n"); | |
2790 | goto out_invalid_cdb_field; | |
2791 | } | |
dd3a5ad8 | 2792 | |
a1d8b49a | 2793 | cmd->t_task_lba = get_unaligned_be64(&cdb[12]); |
c66ac9db NB |
2794 | cmd->se_cmd_flags |= SCF_SCSI_CONTROL_SG_IO_CDB; |
2795 | ||
706d5860 | 2796 | if (target_check_write_same_discard(&cdb[10], dev) < 0) |
67236c44 | 2797 | goto out_unsupported_cdb; |
5bda90c8 CH |
2798 | if (!passthrough) |
2799 | cmd->execute_task = target_emulate_write_same; | |
c66ac9db NB |
2800 | break; |
2801 | default: | |
6708bb27 | 2802 | pr_err("VARIABLE_LENGTH_CMD service action" |
c66ac9db NB |
2803 | " 0x%04x not supported\n", service_action); |
2804 | goto out_unsupported_cdb; | |
2805 | } | |
2806 | break; | |
e434f1f1 | 2807 | case MAINTENANCE_IN: |
e3d6f909 | 2808 | if (dev->transport->get_device_type(dev) != TYPE_ROM) { |
c66ac9db NB |
2809 | /* MAINTENANCE_IN from SCC-2 */ |
2810 | /* | |
2811 | * Check for emulated MI_REPORT_TARGET_PGS. | |
2812 | */ | |
e76a35d6 CH |
2813 | if (cdb[1] == MI_REPORT_TARGET_PGS && |
2814 | su_dev->t10_alua.alua_type == SPC3_ALUA_EMULATED) { | |
2815 | cmd->execute_task = | |
2816 | target_emulate_report_target_port_groups; | |
c66ac9db NB |
2817 | } |
2818 | size = (cdb[6] << 24) | (cdb[7] << 16) | | |
2819 | (cdb[8] << 8) | cdb[9]; | |
2820 | } else { | |
2821 | /* GPCMD_SEND_KEY from multi media commands */ | |
2822 | size = (cdb[8] << 8) + cdb[9]; | |
2823 | } | |
05d1c7c0 | 2824 | cmd->se_cmd_flags |= SCF_SCSI_CONTROL_SG_IO_CDB; |
c66ac9db NB |
2825 | break; |
2826 | case MODE_SELECT: | |
2827 | size = cdb[4]; | |
2828 | cmd->se_cmd_flags |= SCF_SCSI_CONTROL_SG_IO_CDB; | |
2829 | break; | |
2830 | case MODE_SELECT_10: | |
2831 | size = (cdb[7] << 8) + cdb[8]; | |
2832 | cmd->se_cmd_flags |= SCF_SCSI_CONTROL_SG_IO_CDB; | |
2833 | break; | |
2834 | case MODE_SENSE: | |
2835 | size = cdb[4]; | |
05d1c7c0 | 2836 | cmd->se_cmd_flags |= SCF_SCSI_CONTROL_SG_IO_CDB; |
5bda90c8 CH |
2837 | if (!passthrough) |
2838 | cmd->execute_task = target_emulate_modesense; | |
c66ac9db NB |
2839 | break; |
2840 | case MODE_SENSE_10: | |
5bda90c8 CH |
2841 | size = (cdb[7] << 8) + cdb[8]; |
2842 | cmd->se_cmd_flags |= SCF_SCSI_CONTROL_SG_IO_CDB; | |
2843 | if (!passthrough) | |
2844 | cmd->execute_task = target_emulate_modesense; | |
2845 | break; | |
c66ac9db NB |
2846 | case GPCMD_READ_BUFFER_CAPACITY: |
2847 | case GPCMD_SEND_OPC: | |
2848 | case LOG_SELECT: | |
2849 | case LOG_SENSE: | |
2850 | size = (cdb[7] << 8) + cdb[8]; | |
05d1c7c0 | 2851 | cmd->se_cmd_flags |= SCF_SCSI_CONTROL_SG_IO_CDB; |
c66ac9db NB |
2852 | break; |
2853 | case READ_BLOCK_LIMITS: | |
2854 | size = READ_BLOCK_LEN; | |
05d1c7c0 | 2855 | cmd->se_cmd_flags |= SCF_SCSI_CONTROL_SG_IO_CDB; |
c66ac9db NB |
2856 | break; |
2857 | case GPCMD_GET_CONFIGURATION: | |
2858 | case GPCMD_READ_FORMAT_CAPACITIES: | |
2859 | case GPCMD_READ_DISC_INFO: | |
2860 | case GPCMD_READ_TRACK_RZONE_INFO: | |
2861 | size = (cdb[7] << 8) + cdb[8]; | |
2862 | cmd->se_cmd_flags |= SCF_SCSI_CONTROL_SG_IO_CDB; | |
2863 | break; | |
2864 | case PERSISTENT_RESERVE_IN: | |
617c0e06 | 2865 | if (su_dev->t10_pr.res_type == SPC3_PERSISTENT_RESERVATIONS) |
e76a35d6 | 2866 | cmd->execute_task = target_scsi3_emulate_pr_in; |
617c0e06 CH |
2867 | size = (cdb[7] << 8) + cdb[8]; |
2868 | cmd->se_cmd_flags |= SCF_SCSI_CONTROL_SG_IO_CDB; | |
2869 | break; | |
c66ac9db | 2870 | case PERSISTENT_RESERVE_OUT: |
617c0e06 | 2871 | if (su_dev->t10_pr.res_type == SPC3_PERSISTENT_RESERVATIONS) |
e76a35d6 | 2872 | cmd->execute_task = target_scsi3_emulate_pr_out; |
c66ac9db | 2873 | size = (cdb[7] << 8) + cdb[8]; |
05d1c7c0 | 2874 | cmd->se_cmd_flags |= SCF_SCSI_CONTROL_SG_IO_CDB; |
c66ac9db NB |
2875 | break; |
2876 | case GPCMD_MECHANISM_STATUS: | |
2877 | case GPCMD_READ_DVD_STRUCTURE: | |
2878 | size = (cdb[8] << 8) + cdb[9]; | |
2879 | cmd->se_cmd_flags |= SCF_SCSI_CONTROL_SG_IO_CDB; | |
2880 | break; | |
2881 | case READ_POSITION: | |
2882 | size = READ_POSITION_LEN; | |
05d1c7c0 | 2883 | cmd->se_cmd_flags |= SCF_SCSI_CONTROL_SG_IO_CDB; |
c66ac9db | 2884 | break; |
e434f1f1 | 2885 | case MAINTENANCE_OUT: |
e3d6f909 | 2886 | if (dev->transport->get_device_type(dev) != TYPE_ROM) { |
c66ac9db NB |
2887 | /* MAINTENANCE_OUT from SCC-2 |
2888 | * | |
2889 | * Check for emulated MO_SET_TARGET_PGS. | |
2890 | */ | |
e76a35d6 CH |
2891 | if (cdb[1] == MO_SET_TARGET_PGS && |
2892 | su_dev->t10_alua.alua_type == SPC3_ALUA_EMULATED) { | |
2893 | cmd->execute_task = | |
2894 | target_emulate_set_target_port_groups; | |
c66ac9db NB |
2895 | } |
2896 | ||
2897 | size = (cdb[6] << 24) | (cdb[7] << 16) | | |
2898 | (cdb[8] << 8) | cdb[9]; | |
2899 | } else { | |
2900 | /* GPCMD_REPORT_KEY from multi media commands */ | |
2901 | size = (cdb[8] << 8) + cdb[9]; | |
2902 | } | |
05d1c7c0 | 2903 | cmd->se_cmd_flags |= SCF_SCSI_CONTROL_SG_IO_CDB; |
c66ac9db NB |
2904 | break; |
2905 | case INQUIRY: | |
2906 | size = (cdb[3] << 8) + cdb[4]; | |
2907 | /* | |
2908 | * Do implict HEAD_OF_QUEUE processing for INQUIRY. | |
2909 | * See spc4r17 section 5.3 | |
2910 | */ | |
5951146d | 2911 | if (cmd->se_dev->dev_task_attr_type == SAM_TASK_ATTR_EMULATED) |
e66ecd50 | 2912 | cmd->sam_task_attr = MSG_HEAD_TAG; |
05d1c7c0 | 2913 | cmd->se_cmd_flags |= SCF_SCSI_CONTROL_SG_IO_CDB; |
5bda90c8 CH |
2914 | if (!passthrough) |
2915 | cmd->execute_task = target_emulate_inquiry; | |
c66ac9db NB |
2916 | break; |
2917 | case READ_BUFFER: | |
2918 | size = (cdb[6] << 16) + (cdb[7] << 8) + cdb[8]; | |
05d1c7c0 | 2919 | cmd->se_cmd_flags |= SCF_SCSI_CONTROL_SG_IO_CDB; |
c66ac9db NB |
2920 | break; |
2921 | case READ_CAPACITY: | |
2922 | size = READ_CAP_LEN; | |
05d1c7c0 | 2923 | cmd->se_cmd_flags |= SCF_SCSI_CONTROL_SG_IO_CDB; |
5bda90c8 CH |
2924 | if (!passthrough) |
2925 | cmd->execute_task = target_emulate_readcapacity; | |
c66ac9db NB |
2926 | break; |
2927 | case READ_MEDIA_SERIAL_NUMBER: | |
2928 | case SECURITY_PROTOCOL_IN: | |
2929 | case SECURITY_PROTOCOL_OUT: | |
2930 | size = (cdb[6] << 24) | (cdb[7] << 16) | (cdb[8] << 8) | cdb[9]; | |
05d1c7c0 | 2931 | cmd->se_cmd_flags |= SCF_SCSI_CONTROL_SG_IO_CDB; |
c66ac9db NB |
2932 | break; |
2933 | case SERVICE_ACTION_IN: | |
5bda90c8 CH |
2934 | switch (cmd->t_task_cdb[1] & 0x1f) { |
2935 | case SAI_READ_CAPACITY_16: | |
2936 | if (!passthrough) | |
2937 | cmd->execute_task = | |
2938 | target_emulate_readcapacity_16; | |
2939 | break; | |
2940 | default: | |
2941 | if (passthrough) | |
2942 | break; | |
2943 | ||
2944 | pr_err("Unsupported SA: 0x%02x\n", | |
2945 | cmd->t_task_cdb[1] & 0x1f); | |
b168fe8c | 2946 | goto out_invalid_cdb_field; |
5bda90c8 CH |
2947 | } |
2948 | /*FALLTHROUGH*/ | |
c66ac9db NB |
2949 | case ACCESS_CONTROL_IN: |
2950 | case ACCESS_CONTROL_OUT: | |
2951 | case EXTENDED_COPY: | |
2952 | case READ_ATTRIBUTE: | |
2953 | case RECEIVE_COPY_RESULTS: | |
2954 | case WRITE_ATTRIBUTE: | |
2955 | size = (cdb[10] << 24) | (cdb[11] << 16) | | |
2956 | (cdb[12] << 8) | cdb[13]; | |
05d1c7c0 | 2957 | cmd->se_cmd_flags |= SCF_SCSI_CONTROL_SG_IO_CDB; |
c66ac9db NB |
2958 | break; |
2959 | case RECEIVE_DIAGNOSTIC: | |
2960 | case SEND_DIAGNOSTIC: | |
2961 | size = (cdb[3] << 8) | cdb[4]; | |
05d1c7c0 | 2962 | cmd->se_cmd_flags |= SCF_SCSI_CONTROL_SG_IO_CDB; |
c66ac9db NB |
2963 | break; |
2964 | /* #warning FIXME: Figure out correct GPCMD_READ_CD blocksize. */ | |
2965 | #if 0 | |
2966 | case GPCMD_READ_CD: | |
2967 | sectors = (cdb[6] << 16) + (cdb[7] << 8) + cdb[8]; | |
2968 | size = (2336 * sectors); | |
05d1c7c0 | 2969 | cmd->se_cmd_flags |= SCF_SCSI_CONTROL_SG_IO_CDB; |
c66ac9db NB |
2970 | break; |
2971 | #endif | |
2972 | case READ_TOC: | |
2973 | size = cdb[8]; | |
05d1c7c0 | 2974 | cmd->se_cmd_flags |= SCF_SCSI_CONTROL_SG_IO_CDB; |
c66ac9db NB |
2975 | break; |
2976 | case REQUEST_SENSE: | |
2977 | size = cdb[4]; | |
05d1c7c0 | 2978 | cmd->se_cmd_flags |= SCF_SCSI_CONTROL_SG_IO_CDB; |
5bda90c8 CH |
2979 | if (!passthrough) |
2980 | cmd->execute_task = target_emulate_request_sense; | |
c66ac9db NB |
2981 | break; |
2982 | case READ_ELEMENT_STATUS: | |
2983 | size = 65536 * cdb[7] + 256 * cdb[8] + cdb[9]; | |
05d1c7c0 | 2984 | cmd->se_cmd_flags |= SCF_SCSI_CONTROL_SG_IO_CDB; |
c66ac9db NB |
2985 | break; |
2986 | case WRITE_BUFFER: | |
2987 | size = (cdb[6] << 16) + (cdb[7] << 8) + cdb[8]; | |
05d1c7c0 | 2988 | cmd->se_cmd_flags |= SCF_SCSI_CONTROL_SG_IO_CDB; |
c66ac9db NB |
2989 | break; |
2990 | case RESERVE: | |
2991 | case RESERVE_10: | |
2992 | /* | |
2993 | * The SPC-2 RESERVE does not contain a size in the SCSI CDB. | |
2994 | * Assume the passthrough or $FABRIC_MOD will tell us about it. | |
2995 | */ | |
2996 | if (cdb[0] == RESERVE_10) | |
2997 | size = (cdb[7] << 8) | cdb[8]; | |
2998 | else | |
2999 | size = cmd->data_length; | |
3000 | ||
3001 | /* | |
3002 | * Setup the legacy emulated handler for SPC-2 and | |
3003 | * >= SPC-3 compatible reservation handling (CRH=1) | |
3004 | * Otherwise, we assume the underlying SCSI logic is | |
3005 | * is running in SPC_PASSTHROUGH, and wants reservations | |
3006 | * emulation disabled. | |
3007 | */ | |
e76a35d6 CH |
3008 | if (su_dev->t10_pr.res_type != SPC_PASSTHROUGH) |
3009 | cmd->execute_task = target_scsi2_reservation_reserve; | |
c66ac9db NB |
3010 | cmd->se_cmd_flags |= SCF_SCSI_NON_DATA_CDB; |
3011 | break; | |
3012 | case RELEASE: | |
3013 | case RELEASE_10: | |
3014 | /* | |
3015 | * The SPC-2 RELEASE does not contain a size in the SCSI CDB. | |
3016 | * Assume the passthrough or $FABRIC_MOD will tell us about it. | |
3017 | */ | |
3018 | if (cdb[0] == RELEASE_10) | |
3019 | size = (cdb[7] << 8) | cdb[8]; | |
3020 | else | |
3021 | size = cmd->data_length; | |
3022 | ||
e76a35d6 CH |
3023 | if (su_dev->t10_pr.res_type != SPC_PASSTHROUGH) |
3024 | cmd->execute_task = target_scsi2_reservation_release; | |
c66ac9db NB |
3025 | cmd->se_cmd_flags |= SCF_SCSI_NON_DATA_CDB; |
3026 | break; | |
3027 | case SYNCHRONIZE_CACHE: | |
8e94b8db | 3028 | case SYNCHRONIZE_CACHE_16: |
c66ac9db NB |
3029 | /* |
3030 | * Extract LBA and range to be flushed for emulated SYNCHRONIZE_CACHE | |
3031 | */ | |
3032 | if (cdb[0] == SYNCHRONIZE_CACHE) { | |
3033 | sectors = transport_get_sectors_10(cdb, cmd, §or_ret); | |
a1d8b49a | 3034 | cmd->t_task_lba = transport_lba_32(cdb); |
c66ac9db NB |
3035 | } else { |
3036 | sectors = transport_get_sectors_16(cdb, cmd, §or_ret); | |
a1d8b49a | 3037 | cmd->t_task_lba = transport_lba_64(cdb); |
c66ac9db NB |
3038 | } |
3039 | if (sector_ret) | |
3040 | goto out_unsupported_cdb; | |
3041 | ||
3042 | size = transport_get_size(sectors, cdb, cmd); | |
3043 | cmd->se_cmd_flags |= SCF_SCSI_NON_DATA_CDB; | |
3044 | ||
5bda90c8 | 3045 | if (passthrough) |
c66ac9db | 3046 | break; |
5bda90c8 | 3047 | |
c66ac9db NB |
3048 | /* |
3049 | * Check to ensure that LBA + Range does not exceed past end of | |
7abbe7f3 | 3050 | * device for IBLOCK and FILEIO ->do_sync_cache() backend calls |
c66ac9db | 3051 | */ |
7abbe7f3 NB |
3052 | if ((cmd->t_task_lba != 0) || (sectors != 0)) { |
3053 | if (transport_cmd_get_valid_sectors(cmd) < 0) | |
3054 | goto out_invalid_cdb_field; | |
3055 | } | |
5bda90c8 | 3056 | cmd->execute_task = target_emulate_synchronize_cache; |
c66ac9db NB |
3057 | break; |
3058 | case UNMAP: | |
3059 | size = get_unaligned_be16(&cdb[7]); | |
05d1c7c0 | 3060 | cmd->se_cmd_flags |= SCF_SCSI_CONTROL_SG_IO_CDB; |
5bda90c8 CH |
3061 | if (!passthrough) |
3062 | cmd->execute_task = target_emulate_unmap; | |
c66ac9db NB |
3063 | break; |
3064 | case WRITE_SAME_16: | |
3065 | sectors = transport_get_sectors_16(cdb, cmd, §or_ret); | |
3066 | if (sector_ret) | |
3067 | goto out_unsupported_cdb; | |
dd3a5ad8 | 3068 | |
6708bb27 | 3069 | if (sectors) |
12850626 | 3070 | size = transport_get_size(1, cdb, cmd); |
6708bb27 AG |
3071 | else { |
3072 | pr_err("WSNZ=1, WRITE_SAME w/sectors=0 not supported\n"); | |
3073 | goto out_invalid_cdb_field; | |
3074 | } | |
dd3a5ad8 | 3075 | |
5db0753b | 3076 | cmd->t_task_lba = get_unaligned_be64(&cdb[2]); |
706d5860 NB |
3077 | cmd->se_cmd_flags |= SCF_SCSI_CONTROL_SG_IO_CDB; |
3078 | ||
3079 | if (target_check_write_same_discard(&cdb[1], dev) < 0) | |
67236c44 | 3080 | goto out_unsupported_cdb; |
5bda90c8 CH |
3081 | if (!passthrough) |
3082 | cmd->execute_task = target_emulate_write_same; | |
706d5860 NB |
3083 | break; |
3084 | case WRITE_SAME: | |
3085 | sectors = transport_get_sectors_10(cdb, cmd, §or_ret); | |
3086 | if (sector_ret) | |
3087 | goto out_unsupported_cdb; | |
3088 | ||
3089 | if (sectors) | |
12850626 | 3090 | size = transport_get_size(1, cdb, cmd); |
706d5860 NB |
3091 | else { |
3092 | pr_err("WSNZ=1, WRITE_SAME w/sectors=0 not supported\n"); | |
3093 | goto out_invalid_cdb_field; | |
c66ac9db | 3094 | } |
706d5860 NB |
3095 | |
3096 | cmd->t_task_lba = get_unaligned_be32(&cdb[2]); | |
c66ac9db | 3097 | cmd->se_cmd_flags |= SCF_SCSI_CONTROL_SG_IO_CDB; |
706d5860 NB |
3098 | /* |
3099 | * Follow sbcr26 with WRITE_SAME (10) and check for the existence | |
3100 | * of byte 1 bit 3 UNMAP instead of original reserved field | |
3101 | */ | |
3102 | if (target_check_write_same_discard(&cdb[1], dev) < 0) | |
67236c44 | 3103 | goto out_unsupported_cdb; |
5bda90c8 CH |
3104 | if (!passthrough) |
3105 | cmd->execute_task = target_emulate_write_same; | |
c66ac9db NB |
3106 | break; |
3107 | case ALLOW_MEDIUM_REMOVAL: | |
c66ac9db | 3108 | case ERASE: |
c66ac9db NB |
3109 | case REZERO_UNIT: |
3110 | case SEEK_10: | |
c66ac9db NB |
3111 | case SPACE: |
3112 | case START_STOP: | |
3113 | case TEST_UNIT_READY: | |
3114 | case VERIFY: | |
3115 | case WRITE_FILEMARKS: | |
5bda90c8 CH |
3116 | cmd->se_cmd_flags |= SCF_SCSI_NON_DATA_CDB; |
3117 | if (!passthrough) | |
3118 | cmd->execute_task = target_emulate_noop; | |
3119 | break; | |
3120 | case GPCMD_CLOSE_TRACK: | |
3121 | case INITIALIZE_ELEMENT_STATUS: | |
3122 | case GPCMD_LOAD_UNLOAD: | |
3123 | case GPCMD_SET_SPEED: | |
c66ac9db NB |
3124 | case MOVE_MEDIUM: |
3125 | cmd->se_cmd_flags |= SCF_SCSI_NON_DATA_CDB; | |
3126 | break; | |
3127 | case REPORT_LUNS: | |
e76a35d6 | 3128 | cmd->execute_task = target_report_luns; |
c66ac9db NB |
3129 | size = (cdb[6] << 24) | (cdb[7] << 16) | (cdb[8] << 8) | cdb[9]; |
3130 | /* | |
3131 | * Do implict HEAD_OF_QUEUE processing for REPORT_LUNS | |
3132 | * See spc4r17 section 5.3 | |
3133 | */ | |
5951146d | 3134 | if (cmd->se_dev->dev_task_attr_type == SAM_TASK_ATTR_EMULATED) |
e66ecd50 | 3135 | cmd->sam_task_attr = MSG_HEAD_TAG; |
05d1c7c0 | 3136 | cmd->se_cmd_flags |= SCF_SCSI_CONTROL_SG_IO_CDB; |
c66ac9db NB |
3137 | break; |
3138 | default: | |
6708bb27 | 3139 | pr_warn("TARGET_CORE[%s]: Unsupported SCSI Opcode" |
c66ac9db | 3140 | " 0x%02x, sending CHECK_CONDITION.\n", |
e3d6f909 | 3141 | cmd->se_tfo->get_fabric_name(), cdb[0]); |
c66ac9db NB |
3142 | goto out_unsupported_cdb; |
3143 | } | |
3144 | ||
3145 | if (size != cmd->data_length) { | |
6708bb27 | 3146 | pr_warn("TARGET_CORE[%s]: Expected Transfer Length:" |
c66ac9db | 3147 | " %u does not match SCSI CDB Length: %u for SAM Opcode:" |
e3d6f909 | 3148 | " 0x%02x\n", cmd->se_tfo->get_fabric_name(), |
c66ac9db NB |
3149 | cmd->data_length, size, cdb[0]); |
3150 | ||
3151 | cmd->cmd_spdtl = size; | |
3152 | ||
3153 | if (cmd->data_direction == DMA_TO_DEVICE) { | |
6708bb27 | 3154 | pr_err("Rejecting underflow/overflow" |
c66ac9db NB |
3155 | " WRITE data\n"); |
3156 | goto out_invalid_cdb_field; | |
3157 | } | |
3158 | /* | |
3159 | * Reject READ_* or WRITE_* with overflow/underflow for | |
3160 | * type SCF_SCSI_DATA_SG_IO_CDB. | |
3161 | */ | |
6708bb27 AG |
3162 | if (!ret && (dev->se_sub_dev->se_dev_attrib.block_size != 512)) { |
3163 | pr_err("Failing OVERFLOW/UNDERFLOW for LBA op" | |
c66ac9db | 3164 | " CDB on non 512-byte sector setup subsystem" |
e3d6f909 | 3165 | " plugin: %s\n", dev->transport->name); |
c66ac9db NB |
3166 | /* Returns CHECK_CONDITION + INVALID_CDB_FIELD */ |
3167 | goto out_invalid_cdb_field; | |
3168 | } | |
3169 | ||
3170 | if (size > cmd->data_length) { | |
3171 | cmd->se_cmd_flags |= SCF_OVERFLOW_BIT; | |
3172 | cmd->residual_count = (size - cmd->data_length); | |
3173 | } else { | |
3174 | cmd->se_cmd_flags |= SCF_UNDERFLOW_BIT; | |
3175 | cmd->residual_count = (cmd->data_length - size); | |
3176 | } | |
3177 | cmd->data_length = size; | |
3178 | } | |
3179 | ||
015487b8 RD |
3180 | if (cmd->se_cmd_flags & SCF_SCSI_DATA_SG_IO_CDB && |
3181 | sectors > dev->se_sub_dev->se_dev_attrib.fabric_max_sectors) { | |
3182 | printk_ratelimited(KERN_ERR "SCSI OP %02xh with too big sectors %u\n", | |
3183 | cdb[0], sectors); | |
3184 | goto out_invalid_cdb_field; | |
3185 | } | |
3186 | ||
5bda90c8 CH |
3187 | /* reject any command that we don't have a handler for */ |
3188 | if (!(passthrough || cmd->execute_task || | |
3189 | (cmd->se_cmd_flags & SCF_SCSI_DATA_SG_IO_CDB))) | |
3190 | goto out_unsupported_cdb; | |
3191 | ||
c66ac9db NB |
3192 | transport_set_supported_SAM_opcode(cmd); |
3193 | return ret; | |
3194 | ||
3195 | out_unsupported_cdb: | |
3196 | cmd->se_cmd_flags |= SCF_SCSI_CDB_EXCEPTION; | |
3197 | cmd->scsi_sense_reason = TCM_UNSUPPORTED_SCSI_OPCODE; | |
5951146d | 3198 | return -EINVAL; |
c66ac9db NB |
3199 | out_invalid_cdb_field: |
3200 | cmd->se_cmd_flags |= SCF_SCSI_CDB_EXCEPTION; | |
3201 | cmd->scsi_sense_reason = TCM_INVALID_CDB_FIELD; | |
5951146d | 3202 | return -EINVAL; |
c66ac9db NB |
3203 | } |
3204 | ||
c66ac9db | 3205 | /* |
35e0e757 | 3206 | * Called from I/O completion to determine which dormant/delayed |
c66ac9db NB |
3207 | * and ordered cmds need to have their tasks added to the execution queue. |
3208 | */ | |
3209 | static void transport_complete_task_attr(struct se_cmd *cmd) | |
3210 | { | |
5951146d | 3211 | struct se_device *dev = cmd->se_dev; |
c66ac9db NB |
3212 | struct se_cmd *cmd_p, *cmd_tmp; |
3213 | int new_active_tasks = 0; | |
3214 | ||
e66ecd50 | 3215 | if (cmd->sam_task_attr == MSG_SIMPLE_TAG) { |
c66ac9db NB |
3216 | atomic_dec(&dev->simple_cmds); |
3217 | smp_mb__after_atomic_dec(); | |
3218 | dev->dev_cur_ordered_id++; | |
6708bb27 | 3219 | pr_debug("Incremented dev->dev_cur_ordered_id: %u for" |
c66ac9db NB |
3220 | " SIMPLE: %u\n", dev->dev_cur_ordered_id, |
3221 | cmd->se_ordered_id); | |
e66ecd50 | 3222 | } else if (cmd->sam_task_attr == MSG_HEAD_TAG) { |
c66ac9db | 3223 | dev->dev_cur_ordered_id++; |
6708bb27 | 3224 | pr_debug("Incremented dev_cur_ordered_id: %u for" |
c66ac9db NB |
3225 | " HEAD_OF_QUEUE: %u\n", dev->dev_cur_ordered_id, |
3226 | cmd->se_ordered_id); | |
e66ecd50 | 3227 | } else if (cmd->sam_task_attr == MSG_ORDERED_TAG) { |
c66ac9db NB |
3228 | atomic_dec(&dev->dev_ordered_sync); |
3229 | smp_mb__after_atomic_dec(); | |
c66ac9db NB |
3230 | |
3231 | dev->dev_cur_ordered_id++; | |
6708bb27 | 3232 | pr_debug("Incremented dev_cur_ordered_id: %u for ORDERED:" |
c66ac9db NB |
3233 | " %u\n", dev->dev_cur_ordered_id, cmd->se_ordered_id); |
3234 | } | |
3235 | /* | |
3236 | * Process all commands up to the last received | |
3237 | * ORDERED task attribute which requires another blocking | |
3238 | * boundary | |
3239 | */ | |
3240 | spin_lock(&dev->delayed_cmd_lock); | |
3241 | list_for_each_entry_safe(cmd_p, cmd_tmp, | |
5951146d | 3242 | &dev->delayed_cmd_list, se_delayed_node) { |
c66ac9db | 3243 | |
5951146d | 3244 | list_del(&cmd_p->se_delayed_node); |
c66ac9db NB |
3245 | spin_unlock(&dev->delayed_cmd_lock); |
3246 | ||
6708bb27 | 3247 | pr_debug("Calling add_tasks() for" |
c66ac9db NB |
3248 | " cmd_p: 0x%02x Task Attr: 0x%02x" |
3249 | " Dormant -> Active, se_ordered_id: %u\n", | |
6708bb27 | 3250 | cmd_p->t_task_cdb[0], |
c66ac9db NB |
3251 | cmd_p->sam_task_attr, cmd_p->se_ordered_id); |
3252 | ||
3253 | transport_add_tasks_from_cmd(cmd_p); | |
3254 | new_active_tasks++; | |
3255 | ||
3256 | spin_lock(&dev->delayed_cmd_lock); | |
e66ecd50 | 3257 | if (cmd_p->sam_task_attr == MSG_ORDERED_TAG) |
c66ac9db NB |
3258 | break; |
3259 | } | |
3260 | spin_unlock(&dev->delayed_cmd_lock); | |
3261 | /* | |
3262 | * If new tasks have become active, wake up the transport thread | |
3263 | * to do the processing of the Active tasks. | |
3264 | */ | |
3265 | if (new_active_tasks != 0) | |
e3d6f909 | 3266 | wake_up_interruptible(&dev->dev_queue_obj.thread_wq); |
c66ac9db NB |
3267 | } |
3268 | ||
e057f533 | 3269 | static void transport_complete_qf(struct se_cmd *cmd) |
07bde79a NB |
3270 | { |
3271 | int ret = 0; | |
3272 | ||
e057f533 CH |
3273 | if (cmd->se_dev->dev_task_attr_type == SAM_TASK_ATTR_EMULATED) |
3274 | transport_complete_task_attr(cmd); | |
3275 | ||
3276 | if (cmd->se_cmd_flags & SCF_TRANSPORT_TASK_SENSE) { | |
3277 | ret = cmd->se_tfo->queue_status(cmd); | |
3278 | if (ret) | |
3279 | goto out; | |
3280 | } | |
07bde79a NB |
3281 | |
3282 | switch (cmd->data_direction) { | |
3283 | case DMA_FROM_DEVICE: | |
3284 | ret = cmd->se_tfo->queue_data_in(cmd); | |
3285 | break; | |
3286 | case DMA_TO_DEVICE: | |
ec98f782 | 3287 | if (cmd->t_bidi_data_sg) { |
07bde79a NB |
3288 | ret = cmd->se_tfo->queue_data_in(cmd); |
3289 | if (ret < 0) | |
e057f533 | 3290 | break; |
07bde79a NB |
3291 | } |
3292 | /* Fall through for DMA_TO_DEVICE */ | |
3293 | case DMA_NONE: | |
3294 | ret = cmd->se_tfo->queue_status(cmd); | |
3295 | break; | |
3296 | default: | |
3297 | break; | |
3298 | } | |
3299 | ||
e057f533 CH |
3300 | out: |
3301 | if (ret < 0) { | |
3302 | transport_handle_queue_full(cmd, cmd->se_dev); | |
3303 | return; | |
3304 | } | |
3305 | transport_lun_remove_cmd(cmd); | |
3306 | transport_cmd_check_stop_to_fabric(cmd); | |
07bde79a NB |
3307 | } |
3308 | ||
3309 | static void transport_handle_queue_full( | |
3310 | struct se_cmd *cmd, | |
e057f533 | 3311 | struct se_device *dev) |
07bde79a NB |
3312 | { |
3313 | spin_lock_irq(&dev->qf_cmd_lock); | |
07bde79a NB |
3314 | list_add_tail(&cmd->se_qf_node, &cmd->se_dev->qf_cmd_list); |
3315 | atomic_inc(&dev->dev_qf_count); | |
3316 | smp_mb__after_atomic_inc(); | |
3317 | spin_unlock_irq(&cmd->se_dev->qf_cmd_lock); | |
3318 | ||
3319 | schedule_work(&cmd->se_dev->qf_work_queue); | |
3320 | } | |
3321 | ||
35e0e757 | 3322 | static void target_complete_ok_work(struct work_struct *work) |
c66ac9db | 3323 | { |
35e0e757 | 3324 | struct se_cmd *cmd = container_of(work, struct se_cmd, work); |
07bde79a | 3325 | int reason = 0, ret; |
35e0e757 | 3326 | |
c66ac9db NB |
3327 | /* |
3328 | * Check if we need to move delayed/dormant tasks from cmds on the | |
3329 | * delayed execution list after a HEAD_OF_QUEUE or ORDERED Task | |
3330 | * Attribute. | |
3331 | */ | |
5951146d | 3332 | if (cmd->se_dev->dev_task_attr_type == SAM_TASK_ATTR_EMULATED) |
c66ac9db | 3333 | transport_complete_task_attr(cmd); |
07bde79a NB |
3334 | /* |
3335 | * Check to schedule QUEUE_FULL work, or execute an existing | |
3336 | * cmd->transport_qf_callback() | |
3337 | */ | |
3338 | if (atomic_read(&cmd->se_dev->dev_qf_count) != 0) | |
3339 | schedule_work(&cmd->se_dev->qf_work_queue); | |
3340 | ||
c66ac9db NB |
3341 | /* |
3342 | * Check if we need to retrieve a sense buffer from | |
3343 | * the struct se_cmd in question. | |
3344 | */ | |
3345 | if (cmd->se_cmd_flags & SCF_TRANSPORT_TASK_SENSE) { | |
3346 | if (transport_get_sense_data(cmd) < 0) | |
3347 | reason = TCM_NON_EXISTENT_LUN; | |
3348 | ||
3349 | /* | |
3350 | * Only set when an struct se_task->task_scsi_status returned | |
3351 | * a non GOOD status. | |
3352 | */ | |
3353 | if (cmd->scsi_status) { | |
07bde79a | 3354 | ret = transport_send_check_condition_and_sense( |
c66ac9db | 3355 | cmd, reason, 1); |
f147abb4 | 3356 | if (ret == -EAGAIN || ret == -ENOMEM) |
07bde79a NB |
3357 | goto queue_full; |
3358 | ||
c66ac9db NB |
3359 | transport_lun_remove_cmd(cmd); |
3360 | transport_cmd_check_stop_to_fabric(cmd); | |
3361 | return; | |
3362 | } | |
3363 | } | |
3364 | /* | |
25985edc | 3365 | * Check for a callback, used by amongst other things |
c66ac9db NB |
3366 | * XDWRITE_READ_10 emulation. |
3367 | */ | |
3368 | if (cmd->transport_complete_callback) | |
3369 | cmd->transport_complete_callback(cmd); | |
3370 | ||
3371 | switch (cmd->data_direction) { | |
3372 | case DMA_FROM_DEVICE: | |
3373 | spin_lock(&cmd->se_lun->lun_sep_lock); | |
e3d6f909 AG |
3374 | if (cmd->se_lun->lun_sep) { |
3375 | cmd->se_lun->lun_sep->sep_stats.tx_data_octets += | |
c66ac9db NB |
3376 | cmd->data_length; |
3377 | } | |
3378 | spin_unlock(&cmd->se_lun->lun_sep_lock); | |
c66ac9db | 3379 | |
07bde79a | 3380 | ret = cmd->se_tfo->queue_data_in(cmd); |
f147abb4 | 3381 | if (ret == -EAGAIN || ret == -ENOMEM) |
07bde79a | 3382 | goto queue_full; |
c66ac9db NB |
3383 | break; |
3384 | case DMA_TO_DEVICE: | |
3385 | spin_lock(&cmd->se_lun->lun_sep_lock); | |
e3d6f909 AG |
3386 | if (cmd->se_lun->lun_sep) { |
3387 | cmd->se_lun->lun_sep->sep_stats.rx_data_octets += | |
c66ac9db NB |
3388 | cmd->data_length; |
3389 | } | |
3390 | spin_unlock(&cmd->se_lun->lun_sep_lock); | |
3391 | /* | |
3392 | * Check if we need to send READ payload for BIDI-COMMAND | |
3393 | */ | |
ec98f782 | 3394 | if (cmd->t_bidi_data_sg) { |
c66ac9db | 3395 | spin_lock(&cmd->se_lun->lun_sep_lock); |
e3d6f909 AG |
3396 | if (cmd->se_lun->lun_sep) { |
3397 | cmd->se_lun->lun_sep->sep_stats.tx_data_octets += | |
c66ac9db NB |
3398 | cmd->data_length; |
3399 | } | |
3400 | spin_unlock(&cmd->se_lun->lun_sep_lock); | |
07bde79a | 3401 | ret = cmd->se_tfo->queue_data_in(cmd); |
f147abb4 | 3402 | if (ret == -EAGAIN || ret == -ENOMEM) |
07bde79a | 3403 | goto queue_full; |
c66ac9db NB |
3404 | break; |
3405 | } | |
3406 | /* Fall through for DMA_TO_DEVICE */ | |
3407 | case DMA_NONE: | |
07bde79a | 3408 | ret = cmd->se_tfo->queue_status(cmd); |
f147abb4 | 3409 | if (ret == -EAGAIN || ret == -ENOMEM) |
07bde79a | 3410 | goto queue_full; |
c66ac9db NB |
3411 | break; |
3412 | default: | |
3413 | break; | |
3414 | } | |
3415 | ||
3416 | transport_lun_remove_cmd(cmd); | |
3417 | transport_cmd_check_stop_to_fabric(cmd); | |
07bde79a NB |
3418 | return; |
3419 | ||
3420 | queue_full: | |
6708bb27 | 3421 | pr_debug("Handling complete_ok QUEUE_FULL: se_cmd: %p," |
07bde79a | 3422 | " data_direction: %d\n", cmd, cmd->data_direction); |
e057f533 CH |
3423 | cmd->t_state = TRANSPORT_COMPLETE_QF_OK; |
3424 | transport_handle_queue_full(cmd, cmd->se_dev); | |
c66ac9db NB |
3425 | } |
3426 | ||
3427 | static void transport_free_dev_tasks(struct se_cmd *cmd) | |
3428 | { | |
3429 | struct se_task *task, *task_tmp; | |
3430 | unsigned long flags; | |
0c2cfe5f | 3431 | LIST_HEAD(dispose_list); |
c66ac9db | 3432 | |
a1d8b49a | 3433 | spin_lock_irqsave(&cmd->t_state_lock, flags); |
c66ac9db | 3434 | list_for_each_entry_safe(task, task_tmp, |
a1d8b49a | 3435 | &cmd->t_task_list, t_list) { |
0c2cfe5f CH |
3436 | if (!(task->task_flags & TF_ACTIVE)) |
3437 | list_move_tail(&task->t_list, &dispose_list); | |
3438 | } | |
3439 | spin_unlock_irqrestore(&cmd->t_state_lock, flags); | |
3440 | ||
3441 | while (!list_empty(&dispose_list)) { | |
3442 | task = list_first_entry(&dispose_list, struct se_task, t_list); | |
c66ac9db | 3443 | |
af3f00c7 CH |
3444 | if (task->task_sg != cmd->t_data_sg && |
3445 | task->task_sg != cmd->t_bidi_data_sg) | |
3446 | kfree(task->task_sg); | |
c66ac9db NB |
3447 | |
3448 | list_del(&task->t_list); | |
3449 | ||
42bf829e | 3450 | cmd->se_dev->transport->free_task(task); |
c66ac9db | 3451 | } |
c66ac9db NB |
3452 | } |
3453 | ||
6708bb27 | 3454 | static inline void transport_free_sgl(struct scatterlist *sgl, int nents) |
c66ac9db | 3455 | { |
ec98f782 | 3456 | struct scatterlist *sg; |
ec98f782 | 3457 | int count; |
c66ac9db | 3458 | |
6708bb27 AG |
3459 | for_each_sg(sgl, sg, nents, count) |
3460 | __free_page(sg_page(sg)); | |
c66ac9db | 3461 | |
6708bb27 AG |
3462 | kfree(sgl); |
3463 | } | |
c66ac9db | 3464 | |
6708bb27 AG |
3465 | static inline void transport_free_pages(struct se_cmd *cmd) |
3466 | { | |
3467 | if (cmd->se_cmd_flags & SCF_PASSTHROUGH_SG_TO_MEM_NOALLOC) | |
3468 | return; | |
3469 | ||
3470 | transport_free_sgl(cmd->t_data_sg, cmd->t_data_nents); | |
ec98f782 AG |
3471 | cmd->t_data_sg = NULL; |
3472 | cmd->t_data_nents = 0; | |
c66ac9db | 3473 | |
6708bb27 | 3474 | transport_free_sgl(cmd->t_bidi_data_sg, cmd->t_bidi_data_nents); |
ec98f782 AG |
3475 | cmd->t_bidi_data_sg = NULL; |
3476 | cmd->t_bidi_data_nents = 0; | |
c66ac9db NB |
3477 | } |
3478 | ||
e26d99ae CH |
3479 | /** |
3480 | * transport_release_cmd - free a command | |
3481 | * @cmd: command to free | |
3482 | * | |
3483 | * This routine unconditionally frees a command, and reference counting | |
3484 | * or list removal must be done in the caller. | |
3485 | */ | |
3486 | static void transport_release_cmd(struct se_cmd *cmd) | |
3487 | { | |
3488 | BUG_ON(!cmd->se_tfo); | |
3489 | ||
c8e31f26 | 3490 | if (cmd->se_cmd_flags & SCF_SCSI_TMR_CDB) |
e26d99ae CH |
3491 | core_tmr_release_req(cmd->se_tmr_req); |
3492 | if (cmd->t_task_cdb != cmd->__t_task_cdb) | |
3493 | kfree(cmd->t_task_cdb); | |
3494 | /* | |
7481deb4 NB |
3495 | * If this cmd has been setup with target_get_sess_cmd(), drop |
3496 | * the kref and call ->release_cmd() in kref callback. | |
e26d99ae | 3497 | */ |
7481deb4 NB |
3498 | if (cmd->check_release != 0) { |
3499 | target_put_sess_cmd(cmd->se_sess, cmd); | |
3500 | return; | |
3501 | } | |
e26d99ae CH |
3502 | cmd->se_tfo->release_cmd(cmd); |
3503 | } | |
3504 | ||
d3df7825 CH |
3505 | /** |
3506 | * transport_put_cmd - release a reference to a command | |
3507 | * @cmd: command to release | |
3508 | * | |
3509 | * This routine releases our reference to the command and frees it if possible. | |
3510 | */ | |
39c05f32 | 3511 | static void transport_put_cmd(struct se_cmd *cmd) |
c66ac9db NB |
3512 | { |
3513 | unsigned long flags; | |
4911e3cc | 3514 | int free_tasks = 0; |
c66ac9db | 3515 | |
a1d8b49a | 3516 | spin_lock_irqsave(&cmd->t_state_lock, flags); |
4911e3cc CH |
3517 | if (atomic_read(&cmd->t_fe_count)) { |
3518 | if (!atomic_dec_and_test(&cmd->t_fe_count)) | |
3519 | goto out_busy; | |
3520 | } | |
3521 | ||
3522 | if (atomic_read(&cmd->t_se_count)) { | |
3523 | if (!atomic_dec_and_test(&cmd->t_se_count)) | |
3524 | goto out_busy; | |
3525 | } | |
3526 | ||
7d680f3b CH |
3527 | if (cmd->transport_state & CMD_T_DEV_ACTIVE) { |
3528 | cmd->transport_state &= ~CMD_T_DEV_ACTIVE; | |
4911e3cc CH |
3529 | transport_all_task_dev_remove_state(cmd); |
3530 | free_tasks = 1; | |
c66ac9db | 3531 | } |
a1d8b49a | 3532 | spin_unlock_irqrestore(&cmd->t_state_lock, flags); |
c66ac9db | 3533 | |
4911e3cc CH |
3534 | if (free_tasks != 0) |
3535 | transport_free_dev_tasks(cmd); | |
d3df7825 | 3536 | |
c66ac9db | 3537 | transport_free_pages(cmd); |
31afc39c | 3538 | transport_release_cmd(cmd); |
39c05f32 | 3539 | return; |
4911e3cc CH |
3540 | out_busy: |
3541 | spin_unlock_irqrestore(&cmd->t_state_lock, flags); | |
c66ac9db NB |
3542 | } |
3543 | ||
c66ac9db | 3544 | /* |
ec98f782 AG |
3545 | * transport_generic_map_mem_to_cmd - Use fabric-alloced pages instead of |
3546 | * allocating in the core. | |
c66ac9db NB |
3547 | * @cmd: Associated se_cmd descriptor |
3548 | * @mem: SGL style memory for TCM WRITE / READ | |
3549 | * @sg_mem_num: Number of SGL elements | |
3550 | * @mem_bidi_in: SGL style memory for TCM BIDI READ | |
3551 | * @sg_mem_bidi_num: Number of BIDI READ SGL elements | |
3552 | * | |
3553 | * Return: nonzero return cmd was rejected for -ENOMEM or inproper usage | |
3554 | * of parameters. | |
3555 | */ | |
3556 | int transport_generic_map_mem_to_cmd( | |
3557 | struct se_cmd *cmd, | |
5951146d AG |
3558 | struct scatterlist *sgl, |
3559 | u32 sgl_count, | |
3560 | struct scatterlist *sgl_bidi, | |
3561 | u32 sgl_bidi_count) | |
c66ac9db | 3562 | { |
5951146d | 3563 | if (!sgl || !sgl_count) |
c66ac9db | 3564 | return 0; |
c66ac9db | 3565 | |
c66ac9db NB |
3566 | if ((cmd->se_cmd_flags & SCF_SCSI_DATA_SG_IO_CDB) || |
3567 | (cmd->se_cmd_flags & SCF_SCSI_CONTROL_SG_IO_CDB)) { | |
fef58a60 NB |
3568 | /* |
3569 | * Reject SCSI data overflow with map_mem_to_cmd() as incoming | |
3570 | * scatterlists already have been set to follow what the fabric | |
3571 | * passes for the original expected data transfer length. | |
3572 | */ | |
3573 | if (cmd->se_cmd_flags & SCF_OVERFLOW_BIT) { | |
3574 | pr_warn("Rejecting SCSI DATA overflow for fabric using" | |
3575 | " SCF_PASSTHROUGH_SG_TO_MEM_NOALLOC\n"); | |
3576 | cmd->se_cmd_flags |= SCF_SCSI_CDB_EXCEPTION; | |
3577 | cmd->scsi_sense_reason = TCM_INVALID_CDB_FIELD; | |
3578 | return -EINVAL; | |
3579 | } | |
c66ac9db | 3580 | |
ec98f782 AG |
3581 | cmd->t_data_sg = sgl; |
3582 | cmd->t_data_nents = sgl_count; | |
c66ac9db | 3583 | |
ec98f782 AG |
3584 | if (sgl_bidi && sgl_bidi_count) { |
3585 | cmd->t_bidi_data_sg = sgl_bidi; | |
3586 | cmd->t_bidi_data_nents = sgl_bidi_count; | |
c66ac9db NB |
3587 | } |
3588 | cmd->se_cmd_flags |= SCF_PASSTHROUGH_SG_TO_MEM_NOALLOC; | |
c66ac9db NB |
3589 | } |
3590 | ||
3591 | return 0; | |
3592 | } | |
3593 | EXPORT_SYMBOL(transport_generic_map_mem_to_cmd); | |
3594 | ||
4949314c | 3595 | void *transport_kmap_data_sg(struct se_cmd *cmd) |
05d1c7c0 | 3596 | { |
ec98f782 | 3597 | struct scatterlist *sg = cmd->t_data_sg; |
4949314c AG |
3598 | struct page **pages; |
3599 | int i; | |
05d1c7c0 | 3600 | |
ec98f782 | 3601 | BUG_ON(!sg); |
05d1c7c0 | 3602 | /* |
ec98f782 AG |
3603 | * We need to take into account a possible offset here for fabrics like |
3604 | * tcm_loop who may be using a contig buffer from the SCSI midlayer for | |
3605 | * control CDBs passed as SGLs via transport_generic_map_mem_to_cmd() | |
05d1c7c0 | 3606 | */ |
4949314c AG |
3607 | if (!cmd->t_data_nents) |
3608 | return NULL; | |
3609 | else if (cmd->t_data_nents == 1) | |
3610 | return kmap(sg_page(sg)) + sg->offset; | |
3611 | ||
3612 | /* >1 page. use vmap */ | |
3613 | pages = kmalloc(sizeof(*pages) * cmd->t_data_nents, GFP_KERNEL); | |
3614 | if (!pages) | |
3615 | return NULL; | |
3616 | ||
3617 | /* convert sg[] to pages[] */ | |
3618 | for_each_sg(cmd->t_data_sg, sg, cmd->t_data_nents, i) { | |
3619 | pages[i] = sg_page(sg); | |
3620 | } | |
3621 | ||
3622 | cmd->t_data_vmap = vmap(pages, cmd->t_data_nents, VM_MAP, PAGE_KERNEL); | |
3623 | kfree(pages); | |
3624 | if (!cmd->t_data_vmap) | |
3625 | return NULL; | |
3626 | ||
3627 | return cmd->t_data_vmap + cmd->t_data_sg[0].offset; | |
05d1c7c0 | 3628 | } |
4949314c | 3629 | EXPORT_SYMBOL(transport_kmap_data_sg); |
05d1c7c0 | 3630 | |
4949314c | 3631 | void transport_kunmap_data_sg(struct se_cmd *cmd) |
05d1c7c0 | 3632 | { |
a1edf9cf | 3633 | if (!cmd->t_data_nents) { |
4949314c | 3634 | return; |
a1edf9cf | 3635 | } else if (cmd->t_data_nents == 1) { |
4949314c | 3636 | kunmap(sg_page(cmd->t_data_sg)); |
a1edf9cf AG |
3637 | return; |
3638 | } | |
4949314c AG |
3639 | |
3640 | vunmap(cmd->t_data_vmap); | |
3641 | cmd->t_data_vmap = NULL; | |
05d1c7c0 | 3642 | } |
4949314c | 3643 | EXPORT_SYMBOL(transport_kunmap_data_sg); |
05d1c7c0 | 3644 | |
c66ac9db | 3645 | static int |
05d1c7c0 | 3646 | transport_generic_get_mem(struct se_cmd *cmd) |
c66ac9db | 3647 | { |
ec98f782 AG |
3648 | u32 length = cmd->data_length; |
3649 | unsigned int nents; | |
3650 | struct page *page; | |
9db9da33 | 3651 | gfp_t zero_flag; |
ec98f782 | 3652 | int i = 0; |
c66ac9db | 3653 | |
ec98f782 AG |
3654 | nents = DIV_ROUND_UP(length, PAGE_SIZE); |
3655 | cmd->t_data_sg = kmalloc(sizeof(struct scatterlist) * nents, GFP_KERNEL); | |
3656 | if (!cmd->t_data_sg) | |
3657 | return -ENOMEM; | |
c66ac9db | 3658 | |
ec98f782 AG |
3659 | cmd->t_data_nents = nents; |
3660 | sg_init_table(cmd->t_data_sg, nents); | |
c66ac9db | 3661 | |
9db9da33 | 3662 | zero_flag = cmd->se_cmd_flags & SCF_SCSI_DATA_SG_IO_CDB ? 0 : __GFP_ZERO; |
3663 | ||
ec98f782 AG |
3664 | while (length) { |
3665 | u32 page_len = min_t(u32, length, PAGE_SIZE); | |
9db9da33 | 3666 | page = alloc_page(GFP_KERNEL | zero_flag); |
ec98f782 AG |
3667 | if (!page) |
3668 | goto out; | |
c66ac9db | 3669 | |
ec98f782 AG |
3670 | sg_set_page(&cmd->t_data_sg[i], page, page_len, 0); |
3671 | length -= page_len; | |
3672 | i++; | |
c66ac9db | 3673 | } |
c66ac9db | 3674 | return 0; |
c66ac9db | 3675 | |
ec98f782 AG |
3676 | out: |
3677 | while (i >= 0) { | |
3678 | __free_page(sg_page(&cmd->t_data_sg[i])); | |
3679 | i--; | |
c66ac9db | 3680 | } |
ec98f782 AG |
3681 | kfree(cmd->t_data_sg); |
3682 | cmd->t_data_sg = NULL; | |
3683 | return -ENOMEM; | |
c66ac9db NB |
3684 | } |
3685 | ||
a1d8b49a AG |
3686 | /* Reduce sectors if they are too long for the device */ |
3687 | static inline sector_t transport_limit_task_sectors( | |
c66ac9db NB |
3688 | struct se_device *dev, |
3689 | unsigned long long lba, | |
a1d8b49a | 3690 | sector_t sectors) |
c66ac9db | 3691 | { |
a1d8b49a | 3692 | sectors = min_t(sector_t, sectors, dev->se_sub_dev->se_dev_attrib.max_sectors); |
c66ac9db | 3693 | |
a1d8b49a AG |
3694 | if (dev->transport->get_device_type(dev) == TYPE_DISK) |
3695 | if ((lba + sectors) > transport_dev_end_lba(dev)) | |
3696 | sectors = ((transport_dev_end_lba(dev) - lba) + 1); | |
c66ac9db | 3697 | |
a1d8b49a | 3698 | return sectors; |
c66ac9db NB |
3699 | } |
3700 | ||
c66ac9db NB |
3701 | |
3702 | /* | |
3703 | * This function can be used by HW target mode drivers to create a linked | |
3704 | * scatterlist from all contiguously allocated struct se_task->task_sg[]. | |
3705 | * This is intended to be called during the completion path by TCM Core | |
3706 | * when struct target_core_fabric_ops->check_task_sg_chaining is enabled. | |
3707 | */ | |
3708 | void transport_do_task_sg_chain(struct se_cmd *cmd) | |
3709 | { | |
ec98f782 AG |
3710 | struct scatterlist *sg_first = NULL; |
3711 | struct scatterlist *sg_prev = NULL; | |
3712 | int sg_prev_nents = 0; | |
3713 | struct scatterlist *sg; | |
c66ac9db | 3714 | struct se_task *task; |
ec98f782 | 3715 | u32 chained_nents = 0; |
c66ac9db NB |
3716 | int i; |
3717 | ||
ec98f782 AG |
3718 | BUG_ON(!cmd->se_tfo->task_sg_chaining); |
3719 | ||
c66ac9db NB |
3720 | /* |
3721 | * Walk the struct se_task list and setup scatterlist chains | |
a1d8b49a | 3722 | * for each contiguously allocated struct se_task->task_sg[]. |
c66ac9db | 3723 | */ |
a1d8b49a | 3724 | list_for_each_entry(task, &cmd->t_task_list, t_list) { |
ec98f782 | 3725 | if (!task->task_sg) |
c66ac9db NB |
3726 | continue; |
3727 | ||
ec98f782 AG |
3728 | if (!sg_first) { |
3729 | sg_first = task->task_sg; | |
6708bb27 | 3730 | chained_nents = task->task_sg_nents; |
97868c89 | 3731 | } else { |
ec98f782 | 3732 | sg_chain(sg_prev, sg_prev_nents, task->task_sg); |
6708bb27 | 3733 | chained_nents += task->task_sg_nents; |
97868c89 | 3734 | } |
c3c74c7a NB |
3735 | /* |
3736 | * For the padded tasks, use the extra SGL vector allocated | |
3737 | * in transport_allocate_data_tasks() for the sg_prev_nents | |
04629b7b CH |
3738 | * offset into sg_chain() above. |
3739 | * | |
3740 | * We do not need the padding for the last task (or a single | |
3741 | * task), but in that case we will never use the sg_prev_nents | |
3742 | * value below which would be incorrect. | |
c3c74c7a | 3743 | */ |
04629b7b | 3744 | sg_prev_nents = (task->task_sg_nents + 1); |
ec98f782 | 3745 | sg_prev = task->task_sg; |
c66ac9db NB |
3746 | } |
3747 | /* | |
3748 | * Setup the starting pointer and total t_tasks_sg_linked_no including | |
3749 | * padding SGs for linking and to mark the end. | |
3750 | */ | |
a1d8b49a | 3751 | cmd->t_tasks_sg_chained = sg_first; |
ec98f782 | 3752 | cmd->t_tasks_sg_chained_no = chained_nents; |
c66ac9db | 3753 | |
6708bb27 | 3754 | pr_debug("Setup cmd: %p cmd->t_tasks_sg_chained: %p and" |
a1d8b49a AG |
3755 | " t_tasks_sg_chained_no: %u\n", cmd, cmd->t_tasks_sg_chained, |
3756 | cmd->t_tasks_sg_chained_no); | |
c66ac9db | 3757 | |
a1d8b49a AG |
3758 | for_each_sg(cmd->t_tasks_sg_chained, sg, |
3759 | cmd->t_tasks_sg_chained_no, i) { | |
c66ac9db | 3760 | |
6708bb27 | 3761 | pr_debug("SG[%d]: %p page: %p length: %d offset: %d\n", |
5951146d | 3762 | i, sg, sg_page(sg), sg->length, sg->offset); |
c66ac9db | 3763 | if (sg_is_chain(sg)) |
6708bb27 | 3764 | pr_debug("SG: %p sg_is_chain=1\n", sg); |
c66ac9db | 3765 | if (sg_is_last(sg)) |
6708bb27 | 3766 | pr_debug("SG: %p sg_is_last=1\n", sg); |
c66ac9db | 3767 | } |
c66ac9db NB |
3768 | } |
3769 | EXPORT_SYMBOL(transport_do_task_sg_chain); | |
3770 | ||
a1d8b49a AG |
3771 | /* |
3772 | * Break up cmd into chunks transport can handle | |
3773 | */ | |
38b40067 CH |
3774 | static int |
3775 | transport_allocate_data_tasks(struct se_cmd *cmd, | |
c66ac9db | 3776 | enum dma_data_direction data_direction, |
38b40067 | 3777 | struct scatterlist *cmd_sg, unsigned int sgl_nents) |
c66ac9db | 3778 | { |
5951146d | 3779 | struct se_device *dev = cmd->se_dev; |
a3eedc22 | 3780 | int task_count, i; |
38b40067 CH |
3781 | unsigned long long lba; |
3782 | sector_t sectors, dev_max_sectors; | |
3783 | u32 sector_size; | |
3784 | ||
3785 | if (transport_cmd_get_valid_sectors(cmd) < 0) | |
3786 | return -EINVAL; | |
3787 | ||
3788 | dev_max_sectors = dev->se_sub_dev->se_dev_attrib.max_sectors; | |
3789 | sector_size = dev->se_sub_dev->se_dev_attrib.block_size; | |
a1d8b49a | 3790 | |
ec98f782 | 3791 | WARN_ON(cmd->data_length % sector_size); |
38b40067 CH |
3792 | |
3793 | lba = cmd->t_task_lba; | |
ec98f782 | 3794 | sectors = DIV_ROUND_UP(cmd->data_length, sector_size); |
277c5f27 | 3795 | task_count = DIV_ROUND_UP_SECTOR_T(sectors, dev_max_sectors); |
af3f00c7 CH |
3796 | |
3797 | /* | |
3798 | * If we need just a single task reuse the SG list in the command | |
3799 | * and avoid a lot of work. | |
3800 | */ | |
3801 | if (task_count == 1) { | |
3802 | struct se_task *task; | |
3803 | unsigned long flags; | |
3804 | ||
3805 | task = transport_generic_get_task(cmd, data_direction); | |
3806 | if (!task) | |
3807 | return -ENOMEM; | |
3808 | ||
3809 | task->task_sg = cmd_sg; | |
3810 | task->task_sg_nents = sgl_nents; | |
3811 | ||
3812 | task->task_lba = lba; | |
3813 | task->task_sectors = sectors; | |
3814 | task->task_size = task->task_sectors * sector_size; | |
3815 | ||
3816 | spin_lock_irqsave(&cmd->t_state_lock, flags); | |
3817 | list_add_tail(&task->t_list, &cmd->t_task_list); | |
3818 | spin_unlock_irqrestore(&cmd->t_state_lock, flags); | |
3819 | ||
3820 | return task_count; | |
3821 | } | |
3822 | ||
ec98f782 | 3823 | for (i = 0; i < task_count; i++) { |
38b40067 | 3824 | struct se_task *task; |
c3c74c7a | 3825 | unsigned int task_size, task_sg_nents_padded; |
38b40067 CH |
3826 | struct scatterlist *sg; |
3827 | unsigned long flags; | |
ec98f782 | 3828 | int count; |
a1d8b49a | 3829 | |
c66ac9db | 3830 | task = transport_generic_get_task(cmd, data_direction); |
a1d8b49a | 3831 | if (!task) |
ec98f782 | 3832 | return -ENOMEM; |
c66ac9db | 3833 | |
c66ac9db | 3834 | task->task_lba = lba; |
ec98f782 AG |
3835 | task->task_sectors = min(sectors, dev_max_sectors); |
3836 | task->task_size = task->task_sectors * sector_size; | |
c66ac9db | 3837 | |
525a48a2 NB |
3838 | /* |
3839 | * This now assumes that passed sg_ents are in PAGE_SIZE chunks | |
3840 | * in order to calculate the number per task SGL entries | |
3841 | */ | |
3842 | task->task_sg_nents = DIV_ROUND_UP(task->task_size, PAGE_SIZE); | |
c66ac9db | 3843 | /* |
ec98f782 AG |
3844 | * Check if the fabric module driver is requesting that all |
3845 | * struct se_task->task_sg[] be chained together.. If so, | |
3846 | * then allocate an extra padding SG entry for linking and | |
c3c74c7a NB |
3847 | * marking the end of the chained SGL for every task except |
3848 | * the last one for (task_count > 1) operation, or skipping | |
3849 | * the extra padding for the (task_count == 1) case. | |
c66ac9db | 3850 | */ |
c3c74c7a NB |
3851 | if (cmd->se_tfo->task_sg_chaining && (i < (task_count - 1))) { |
3852 | task_sg_nents_padded = (task->task_sg_nents + 1); | |
c3c74c7a NB |
3853 | } else |
3854 | task_sg_nents_padded = task->task_sg_nents; | |
c66ac9db | 3855 | |
1d20bb61 | 3856 | task->task_sg = kmalloc(sizeof(struct scatterlist) * |
c3c74c7a | 3857 | task_sg_nents_padded, GFP_KERNEL); |
ec98f782 AG |
3858 | if (!task->task_sg) { |
3859 | cmd->se_dev->transport->free_task(task); | |
3860 | return -ENOMEM; | |
3861 | } | |
3862 | ||
c3c74c7a | 3863 | sg_init_table(task->task_sg, task_sg_nents_padded); |
c66ac9db | 3864 | |
ec98f782 AG |
3865 | task_size = task->task_size; |
3866 | ||
3867 | /* Build new sgl, only up to task_size */ | |
6708bb27 | 3868 | for_each_sg(task->task_sg, sg, task->task_sg_nents, count) { |
ec98f782 AG |
3869 | if (cmd_sg->length > task_size) |
3870 | break; | |
3871 | ||
3872 | *sg = *cmd_sg; | |
3873 | task_size -= cmd_sg->length; | |
3874 | cmd_sg = sg_next(cmd_sg); | |
c66ac9db | 3875 | } |
c66ac9db | 3876 | |
ec98f782 AG |
3877 | lba += task->task_sectors; |
3878 | sectors -= task->task_sectors; | |
c66ac9db | 3879 | |
ec98f782 AG |
3880 | spin_lock_irqsave(&cmd->t_state_lock, flags); |
3881 | list_add_tail(&task->t_list, &cmd->t_task_list); | |
3882 | spin_unlock_irqrestore(&cmd->t_state_lock, flags); | |
c66ac9db NB |
3883 | } |
3884 | ||
ec98f782 | 3885 | return task_count; |
c66ac9db NB |
3886 | } |
3887 | ||
3888 | static int | |
ec98f782 | 3889 | transport_allocate_control_task(struct se_cmd *cmd) |
c66ac9db | 3890 | { |
c66ac9db | 3891 | struct se_task *task; |
ec98f782 | 3892 | unsigned long flags; |
c66ac9db | 3893 | |
91ec1d35 NB |
3894 | /* Workaround for handling zero-length control CDBs */ |
3895 | if ((cmd->se_cmd_flags & SCF_SCSI_CONTROL_SG_IO_CDB) && | |
3896 | !cmd->data_length) | |
3897 | return 0; | |
3898 | ||
c66ac9db NB |
3899 | task = transport_generic_get_task(cmd, cmd->data_direction); |
3900 | if (!task) | |
ec98f782 | 3901 | return -ENOMEM; |
c66ac9db | 3902 | |
af3f00c7 | 3903 | task->task_sg = cmd->t_data_sg; |
c66ac9db | 3904 | task->task_size = cmd->data_length; |
6708bb27 | 3905 | task->task_sg_nents = cmd->t_data_nents; |
c66ac9db | 3906 | |
ec98f782 AG |
3907 | spin_lock_irqsave(&cmd->t_state_lock, flags); |
3908 | list_add_tail(&task->t_list, &cmd->t_task_list); | |
3909 | spin_unlock_irqrestore(&cmd->t_state_lock, flags); | |
c66ac9db | 3910 | |
6708bb27 | 3911 | /* Success! Return number of tasks allocated */ |
a3eedc22 | 3912 | return 1; |
ec98f782 AG |
3913 | } |
3914 | ||
da0f7619 CH |
3915 | /* |
3916 | * Allocate any required ressources to execute the command, and either place | |
3917 | * it on the execution queue if possible. For writes we might not have the | |
3918 | * payload yet, thus notify the fabric via a call to ->write_pending instead. | |
c66ac9db | 3919 | */ |
a1d8b49a | 3920 | int transport_generic_new_cmd(struct se_cmd *cmd) |
c66ac9db | 3921 | { |
da0f7619 | 3922 | struct se_device *dev = cmd->se_dev; |
9ac54987 | 3923 | int task_cdbs, task_cdbs_bidi = 0; |
da0f7619 | 3924 | int set_counts = 1; |
c66ac9db NB |
3925 | int ret = 0; |
3926 | ||
3927 | /* | |
3928 | * Determine is the TCM fabric module has already allocated physical | |
3929 | * memory, and is directly calling transport_generic_map_mem_to_cmd() | |
ec98f782 | 3930 | * beforehand. |
c66ac9db | 3931 | */ |
ec98f782 AG |
3932 | if (!(cmd->se_cmd_flags & SCF_PASSTHROUGH_SG_TO_MEM_NOALLOC) && |
3933 | cmd->data_length) { | |
05d1c7c0 | 3934 | ret = transport_generic_get_mem(cmd); |
c66ac9db | 3935 | if (ret < 0) |
03e98c9e | 3936 | goto out_fail; |
c66ac9db | 3937 | } |
da0f7619 | 3938 | |
1d20bb61 | 3939 | /* |
38b40067 | 3940 | * For BIDI command set up the read tasks first. |
1d20bb61 | 3941 | */ |
da0f7619 | 3942 | if (cmd->t_bidi_data_sg && |
38b40067 CH |
3943 | dev->transport->transport_type != TRANSPORT_PLUGIN_PHBA_PDEV) { |
3944 | BUG_ON(!(cmd->se_cmd_flags & SCF_SCSI_DATA_SG_IO_CDB)); | |
3945 | ||
9ac54987 NB |
3946 | task_cdbs_bidi = transport_allocate_data_tasks(cmd, |
3947 | DMA_FROM_DEVICE, cmd->t_bidi_data_sg, | |
3948 | cmd->t_bidi_data_nents); | |
3949 | if (task_cdbs_bidi <= 0) | |
da0f7619 CH |
3950 | goto out_fail; |
3951 | ||
3952 | atomic_inc(&cmd->t_fe_count); | |
3953 | atomic_inc(&cmd->t_se_count); | |
3954 | set_counts = 0; | |
3955 | } | |
38b40067 CH |
3956 | |
3957 | if (cmd->se_cmd_flags & SCF_SCSI_DATA_SG_IO_CDB) { | |
3958 | task_cdbs = transport_allocate_data_tasks(cmd, | |
3959 | cmd->data_direction, cmd->t_data_sg, | |
3960 | cmd->t_data_nents); | |
3961 | } else { | |
3962 | task_cdbs = transport_allocate_control_task(cmd); | |
3963 | } | |
3964 | ||
410f6702 | 3965 | if (task_cdbs < 0) |
da0f7619 | 3966 | goto out_fail; |
410f6702 | 3967 | else if (!task_cdbs && (cmd->se_cmd_flags & SCF_SCSI_DATA_SG_IO_CDB)) { |
7d680f3b | 3968 | spin_lock_irq(&cmd->t_state_lock); |
410f6702 | 3969 | cmd->t_state = TRANSPORT_COMPLETE; |
7d680f3b CH |
3970 | cmd->transport_state |= CMD_T_ACTIVE; |
3971 | spin_unlock_irq(&cmd->t_state_lock); | |
91ec1d35 NB |
3972 | |
3973 | if (cmd->t_task_cdb[0] == REQUEST_SENSE) { | |
3974 | u8 ua_asc = 0, ua_ascq = 0; | |
3975 | ||
3976 | core_scsi3_ua_clear_for_request_sense(cmd, | |
3977 | &ua_asc, &ua_ascq); | |
3978 | } | |
3979 | ||
410f6702 RD |
3980 | INIT_WORK(&cmd->work, target_complete_ok_work); |
3981 | queue_work(target_completion_wq, &cmd->work); | |
3982 | return 0; | |
3983 | } | |
da0f7619 CH |
3984 | |
3985 | if (set_counts) { | |
3986 | atomic_inc(&cmd->t_fe_count); | |
3987 | atomic_inc(&cmd->t_se_count); | |
3988 | } | |
3989 | ||
9ac54987 NB |
3990 | cmd->t_task_list_num = (task_cdbs + task_cdbs_bidi); |
3991 | atomic_set(&cmd->t_task_cdbs_left, cmd->t_task_list_num); | |
3992 | atomic_set(&cmd->t_task_cdbs_ex_left, cmd->t_task_list_num); | |
da0f7619 | 3993 | |
c66ac9db | 3994 | /* |
a1d8b49a | 3995 | * For WRITEs, let the fabric know its buffer is ready.. |
c66ac9db NB |
3996 | * This WRITE struct se_cmd (and all of its associated struct se_task's) |
3997 | * will be added to the struct se_device execution queue after its WRITE | |
3998 | * data has arrived. (ie: It gets handled by the transport processing | |
3999 | * thread a second time) | |
4000 | */ | |
4001 | if (cmd->data_direction == DMA_TO_DEVICE) { | |
4002 | transport_add_tasks_to_state_queue(cmd); | |
4003 | return transport_generic_write_pending(cmd); | |
4004 | } | |
4005 | /* | |
4006 | * Everything else but a WRITE, add the struct se_cmd's struct se_task's | |
4007 | * to the execution queue. | |
4008 | */ | |
4009 | transport_execute_tasks(cmd); | |
4010 | return 0; | |
da0f7619 CH |
4011 | |
4012 | out_fail: | |
4013 | cmd->se_cmd_flags |= SCF_SCSI_CDB_EXCEPTION; | |
4014 | cmd->scsi_sense_reason = TCM_LOGICAL_UNIT_COMMUNICATION_FAILURE; | |
4015 | return -EINVAL; | |
c66ac9db | 4016 | } |
a1d8b49a | 4017 | EXPORT_SYMBOL(transport_generic_new_cmd); |
c66ac9db NB |
4018 | |
4019 | /* transport_generic_process_write(): | |
4020 | * | |
4021 | * | |
4022 | */ | |
4023 | void transport_generic_process_write(struct se_cmd *cmd) | |
4024 | { | |
c66ac9db NB |
4025 | transport_execute_tasks(cmd); |
4026 | } | |
4027 | EXPORT_SYMBOL(transport_generic_process_write); | |
4028 | ||
e057f533 | 4029 | static void transport_write_pending_qf(struct se_cmd *cmd) |
07bde79a | 4030 | { |
f147abb4 NB |
4031 | int ret; |
4032 | ||
4033 | ret = cmd->se_tfo->write_pending(cmd); | |
4034 | if (ret == -EAGAIN || ret == -ENOMEM) { | |
e057f533 CH |
4035 | pr_debug("Handling write_pending QUEUE__FULL: se_cmd: %p\n", |
4036 | cmd); | |
4037 | transport_handle_queue_full(cmd, cmd->se_dev); | |
4038 | } | |
07bde79a NB |
4039 | } |
4040 | ||
c66ac9db NB |
4041 | static int transport_generic_write_pending(struct se_cmd *cmd) |
4042 | { | |
4043 | unsigned long flags; | |
4044 | int ret; | |
4045 | ||
a1d8b49a | 4046 | spin_lock_irqsave(&cmd->t_state_lock, flags); |
c66ac9db | 4047 | cmd->t_state = TRANSPORT_WRITE_PENDING; |
a1d8b49a | 4048 | spin_unlock_irqrestore(&cmd->t_state_lock, flags); |
07bde79a | 4049 | |
c66ac9db NB |
4050 | /* |
4051 | * Clear the se_cmd for WRITE_PENDING status in order to set | |
7d680f3b CH |
4052 | * CMD_T_ACTIVE so that transport_generic_handle_data can be called |
4053 | * from HW target mode interrupt code. This is safe to be called | |
4054 | * with transport_off=1 before the cmd->se_tfo->write_pending | |
c66ac9db NB |
4055 | * because the se_cmd->se_lun pointer is not being cleared. |
4056 | */ | |
4057 | transport_cmd_check_stop(cmd, 1, 0); | |
4058 | ||
4059 | /* | |
4060 | * Call the fabric write_pending function here to let the | |
4061 | * frontend know that WRITE buffers are ready. | |
4062 | */ | |
e3d6f909 | 4063 | ret = cmd->se_tfo->write_pending(cmd); |
f147abb4 | 4064 | if (ret == -EAGAIN || ret == -ENOMEM) |
07bde79a NB |
4065 | goto queue_full; |
4066 | else if (ret < 0) | |
c66ac9db NB |
4067 | return ret; |
4068 | ||
03e98c9e | 4069 | return 1; |
07bde79a NB |
4070 | |
4071 | queue_full: | |
6708bb27 | 4072 | pr_debug("Handling write_pending QUEUE__FULL: se_cmd: %p\n", cmd); |
07bde79a | 4073 | cmd->t_state = TRANSPORT_COMPLETE_QF_WP; |
e057f533 | 4074 | transport_handle_queue_full(cmd, cmd->se_dev); |
f147abb4 | 4075 | return 0; |
c66ac9db NB |
4076 | } |
4077 | ||
39c05f32 | 4078 | void transport_generic_free_cmd(struct se_cmd *cmd, int wait_for_tasks) |
c66ac9db | 4079 | { |
d14921d6 | 4080 | if (!(cmd->se_cmd_flags & SCF_SE_LUN_CMD)) { |
c8e31f26 | 4081 | if (wait_for_tasks && (cmd->se_cmd_flags & SCF_SCSI_TMR_CDB)) |
d14921d6 NB |
4082 | transport_wait_for_tasks(cmd); |
4083 | ||
35462975 | 4084 | transport_release_cmd(cmd); |
d14921d6 NB |
4085 | } else { |
4086 | if (wait_for_tasks) | |
4087 | transport_wait_for_tasks(cmd); | |
4088 | ||
c66ac9db NB |
4089 | core_dec_lacl_count(cmd->se_sess->se_node_acl, cmd); |
4090 | ||
82f1c8a4 | 4091 | if (cmd->se_lun) |
c66ac9db | 4092 | transport_lun_remove_cmd(cmd); |
c66ac9db | 4093 | |
f4366772 NB |
4094 | transport_free_dev_tasks(cmd); |
4095 | ||
39c05f32 | 4096 | transport_put_cmd(cmd); |
c66ac9db NB |
4097 | } |
4098 | } | |
4099 | EXPORT_SYMBOL(transport_generic_free_cmd); | |
4100 | ||
a17f091d NB |
4101 | /* target_get_sess_cmd - Add command to active ->sess_cmd_list |
4102 | * @se_sess: session to reference | |
4103 | * @se_cmd: command descriptor to add | |
a6360785 | 4104 | * @ack_kref: Signal that fabric will perform an ack target_put_sess_cmd() |
a17f091d | 4105 | */ |
a6360785 NB |
4106 | void target_get_sess_cmd(struct se_session *se_sess, struct se_cmd *se_cmd, |
4107 | bool ack_kref) | |
a17f091d NB |
4108 | { |
4109 | unsigned long flags; | |
4110 | ||
7481deb4 | 4111 | kref_init(&se_cmd->cmd_kref); |
a6360785 NB |
4112 | /* |
4113 | * Add a second kref if the fabric caller is expecting to handle | |
4114 | * fabric acknowledgement that requires two target_put_sess_cmd() | |
4115 | * invocations before se_cmd descriptor release. | |
4116 | */ | |
86715569 | 4117 | if (ack_kref == true) { |
a6360785 | 4118 | kref_get(&se_cmd->cmd_kref); |
86715569 NB |
4119 | se_cmd->se_cmd_flags |= SCF_ACK_KREF; |
4120 | } | |
7481deb4 | 4121 | |
a17f091d NB |
4122 | spin_lock_irqsave(&se_sess->sess_cmd_lock, flags); |
4123 | list_add_tail(&se_cmd->se_cmd_list, &se_sess->sess_cmd_list); | |
4124 | se_cmd->check_release = 1; | |
4125 | spin_unlock_irqrestore(&se_sess->sess_cmd_lock, flags); | |
4126 | } | |
4127 | EXPORT_SYMBOL(target_get_sess_cmd); | |
4128 | ||
7481deb4 | 4129 | static void target_release_cmd_kref(struct kref *kref) |
a17f091d | 4130 | { |
7481deb4 NB |
4131 | struct se_cmd *se_cmd = container_of(kref, struct se_cmd, cmd_kref); |
4132 | struct se_session *se_sess = se_cmd->se_sess; | |
a17f091d NB |
4133 | unsigned long flags; |
4134 | ||
4135 | spin_lock_irqsave(&se_sess->sess_cmd_lock, flags); | |
4136 | if (list_empty(&se_cmd->se_cmd_list)) { | |
4137 | spin_unlock_irqrestore(&se_sess->sess_cmd_lock, flags); | |
ffc32d52 | 4138 | se_cmd->se_tfo->release_cmd(se_cmd); |
7481deb4 | 4139 | return; |
a17f091d | 4140 | } |
a17f091d NB |
4141 | if (se_sess->sess_tearing_down && se_cmd->cmd_wait_set) { |
4142 | spin_unlock_irqrestore(&se_sess->sess_cmd_lock, flags); | |
4143 | complete(&se_cmd->cmd_wait_comp); | |
7481deb4 | 4144 | return; |
a17f091d NB |
4145 | } |
4146 | list_del(&se_cmd->se_cmd_list); | |
4147 | spin_unlock_irqrestore(&se_sess->sess_cmd_lock, flags); | |
4148 | ||
7481deb4 NB |
4149 | se_cmd->se_tfo->release_cmd(se_cmd); |
4150 | } | |
4151 | ||
4152 | /* target_put_sess_cmd - Check for active I/O shutdown via kref_put | |
4153 | * @se_sess: session to reference | |
4154 | * @se_cmd: command descriptor to drop | |
4155 | */ | |
4156 | int target_put_sess_cmd(struct se_session *se_sess, struct se_cmd *se_cmd) | |
4157 | { | |
4158 | return kref_put(&se_cmd->cmd_kref, target_release_cmd_kref); | |
a17f091d NB |
4159 | } |
4160 | EXPORT_SYMBOL(target_put_sess_cmd); | |
4161 | ||
4162 | /* target_splice_sess_cmd_list - Split active cmds into sess_wait_list | |
4163 | * @se_sess: session to split | |
4164 | */ | |
4165 | void target_splice_sess_cmd_list(struct se_session *se_sess) | |
4166 | { | |
4167 | struct se_cmd *se_cmd; | |
4168 | unsigned long flags; | |
4169 | ||
4170 | WARN_ON(!list_empty(&se_sess->sess_wait_list)); | |
4171 | INIT_LIST_HEAD(&se_sess->sess_wait_list); | |
4172 | ||
4173 | spin_lock_irqsave(&se_sess->sess_cmd_lock, flags); | |
4174 | se_sess->sess_tearing_down = 1; | |
4175 | ||
4176 | list_splice_init(&se_sess->sess_cmd_list, &se_sess->sess_wait_list); | |
4177 | ||
4178 | list_for_each_entry(se_cmd, &se_sess->sess_wait_list, se_cmd_list) | |
4179 | se_cmd->cmd_wait_set = 1; | |
4180 | ||
4181 | spin_unlock_irqrestore(&se_sess->sess_cmd_lock, flags); | |
4182 | } | |
4183 | EXPORT_SYMBOL(target_splice_sess_cmd_list); | |
4184 | ||
4185 | /* target_wait_for_sess_cmds - Wait for outstanding descriptors | |
4186 | * @se_sess: session to wait for active I/O | |
4187 | * @wait_for_tasks: Make extra transport_wait_for_tasks call | |
4188 | */ | |
4189 | void target_wait_for_sess_cmds( | |
4190 | struct se_session *se_sess, | |
4191 | int wait_for_tasks) | |
4192 | { | |
4193 | struct se_cmd *se_cmd, *tmp_cmd; | |
4194 | bool rc = false; | |
4195 | ||
4196 | list_for_each_entry_safe(se_cmd, tmp_cmd, | |
4197 | &se_sess->sess_wait_list, se_cmd_list) { | |
4198 | list_del(&se_cmd->se_cmd_list); | |
4199 | ||
4200 | pr_debug("Waiting for se_cmd: %p t_state: %d, fabric state:" | |
4201 | " %d\n", se_cmd, se_cmd->t_state, | |
4202 | se_cmd->se_tfo->get_cmd_state(se_cmd)); | |
4203 | ||
4204 | if (wait_for_tasks) { | |
4205 | pr_debug("Calling transport_wait_for_tasks se_cmd: %p t_state: %d," | |
4206 | " fabric state: %d\n", se_cmd, se_cmd->t_state, | |
4207 | se_cmd->se_tfo->get_cmd_state(se_cmd)); | |
4208 | ||
4209 | rc = transport_wait_for_tasks(se_cmd); | |
4210 | ||
4211 | pr_debug("After transport_wait_for_tasks se_cmd: %p t_state: %d," | |
4212 | " fabric state: %d\n", se_cmd, se_cmd->t_state, | |
4213 | se_cmd->se_tfo->get_cmd_state(se_cmd)); | |
4214 | } | |
4215 | ||
4216 | if (!rc) { | |
4217 | wait_for_completion(&se_cmd->cmd_wait_comp); | |
4218 | pr_debug("After cmd_wait_comp: se_cmd: %p t_state: %d" | |
4219 | " fabric state: %d\n", se_cmd, se_cmd->t_state, | |
4220 | se_cmd->se_tfo->get_cmd_state(se_cmd)); | |
4221 | } | |
4222 | ||
4223 | se_cmd->se_tfo->release_cmd(se_cmd); | |
4224 | } | |
4225 | } | |
4226 | EXPORT_SYMBOL(target_wait_for_sess_cmds); | |
4227 | ||
c66ac9db NB |
4228 | /* transport_lun_wait_for_tasks(): |
4229 | * | |
4230 | * Called from ConfigFS context to stop the passed struct se_cmd to allow | |
4231 | * an struct se_lun to be successfully shutdown. | |
4232 | */ | |
4233 | static int transport_lun_wait_for_tasks(struct se_cmd *cmd, struct se_lun *lun) | |
4234 | { | |
4235 | unsigned long flags; | |
4236 | int ret; | |
4237 | /* | |
4238 | * If the frontend has already requested this struct se_cmd to | |
4239 | * be stopped, we can safely ignore this struct se_cmd. | |
4240 | */ | |
a1d8b49a | 4241 | spin_lock_irqsave(&cmd->t_state_lock, flags); |
7d680f3b CH |
4242 | if (cmd->transport_state & CMD_T_STOP) { |
4243 | cmd->transport_state &= ~CMD_T_LUN_STOP; | |
4244 | ||
4245 | pr_debug("ConfigFS ITT[0x%08x] - CMD_T_STOP, skipping\n", | |
4246 | cmd->se_tfo->get_task_tag(cmd)); | |
a1d8b49a | 4247 | spin_unlock_irqrestore(&cmd->t_state_lock, flags); |
c66ac9db | 4248 | transport_cmd_check_stop(cmd, 1, 0); |
e3d6f909 | 4249 | return -EPERM; |
c66ac9db | 4250 | } |
7d680f3b | 4251 | cmd->transport_state |= CMD_T_LUN_FE_STOP; |
a1d8b49a | 4252 | spin_unlock_irqrestore(&cmd->t_state_lock, flags); |
c66ac9db | 4253 | |
5951146d | 4254 | wake_up_interruptible(&cmd->se_dev->dev_queue_obj.thread_wq); |
c66ac9db NB |
4255 | |
4256 | ret = transport_stop_tasks_for_cmd(cmd); | |
4257 | ||
6708bb27 AG |
4258 | pr_debug("ConfigFS: cmd: %p t_tasks: %d stop tasks ret:" |
4259 | " %d\n", cmd, cmd->t_task_list_num, ret); | |
c66ac9db | 4260 | if (!ret) { |
6708bb27 | 4261 | pr_debug("ConfigFS: ITT[0x%08x] - stopping cmd....\n", |
e3d6f909 | 4262 | cmd->se_tfo->get_task_tag(cmd)); |
a1d8b49a | 4263 | wait_for_completion(&cmd->transport_lun_stop_comp); |
6708bb27 | 4264 | pr_debug("ConfigFS: ITT[0x%08x] - stopped cmd....\n", |
e3d6f909 | 4265 | cmd->se_tfo->get_task_tag(cmd)); |
c66ac9db | 4266 | } |
3df8d40b | 4267 | transport_remove_cmd_from_queue(cmd); |
c66ac9db NB |
4268 | |
4269 | return 0; | |
4270 | } | |
4271 | ||
c66ac9db NB |
4272 | static void __transport_clear_lun_from_sessions(struct se_lun *lun) |
4273 | { | |
4274 | struct se_cmd *cmd = NULL; | |
4275 | unsigned long lun_flags, cmd_flags; | |
4276 | /* | |
4277 | * Do exception processing and return CHECK_CONDITION status to the | |
4278 | * Initiator Port. | |
4279 | */ | |
4280 | spin_lock_irqsave(&lun->lun_cmd_lock, lun_flags); | |
5951146d AG |
4281 | while (!list_empty(&lun->lun_cmd_list)) { |
4282 | cmd = list_first_entry(&lun->lun_cmd_list, | |
4283 | struct se_cmd, se_lun_node); | |
3d26fea0 | 4284 | list_del_init(&cmd->se_lun_node); |
5951146d | 4285 | |
c66ac9db NB |
4286 | /* |
4287 | * This will notify iscsi_target_transport.c: | |
4288 | * transport_cmd_check_stop() that a LUN shutdown is in | |
4289 | * progress for the iscsi_cmd_t. | |
4290 | */ | |
a1d8b49a | 4291 | spin_lock(&cmd->t_state_lock); |
6708bb27 | 4292 | pr_debug("SE_LUN[%d] - Setting cmd->transport" |
c66ac9db | 4293 | "_lun_stop for ITT: 0x%08x\n", |
e3d6f909 AG |
4294 | cmd->se_lun->unpacked_lun, |
4295 | cmd->se_tfo->get_task_tag(cmd)); | |
7d680f3b | 4296 | cmd->transport_state |= CMD_T_LUN_STOP; |
a1d8b49a | 4297 | spin_unlock(&cmd->t_state_lock); |
c66ac9db NB |
4298 | |
4299 | spin_unlock_irqrestore(&lun->lun_cmd_lock, lun_flags); | |
4300 | ||
6708bb27 AG |
4301 | if (!cmd->se_lun) { |
4302 | pr_err("ITT: 0x%08x, [i,t]_state: %u/%u\n", | |
e3d6f909 AG |
4303 | cmd->se_tfo->get_task_tag(cmd), |
4304 | cmd->se_tfo->get_cmd_state(cmd), cmd->t_state); | |
c66ac9db NB |
4305 | BUG(); |
4306 | } | |
4307 | /* | |
4308 | * If the Storage engine still owns the iscsi_cmd_t, determine | |
4309 | * and/or stop its context. | |
4310 | */ | |
6708bb27 | 4311 | pr_debug("SE_LUN[%d] - ITT: 0x%08x before transport" |
e3d6f909 AG |
4312 | "_lun_wait_for_tasks()\n", cmd->se_lun->unpacked_lun, |
4313 | cmd->se_tfo->get_task_tag(cmd)); | |
c66ac9db | 4314 | |
e3d6f909 | 4315 | if (transport_lun_wait_for_tasks(cmd, cmd->se_lun) < 0) { |
c66ac9db NB |
4316 | spin_lock_irqsave(&lun->lun_cmd_lock, lun_flags); |
4317 | continue; | |
4318 | } | |
4319 | ||
6708bb27 | 4320 | pr_debug("SE_LUN[%d] - ITT: 0x%08x after transport_lun" |
c66ac9db | 4321 | "_wait_for_tasks(): SUCCESS\n", |
e3d6f909 AG |
4322 | cmd->se_lun->unpacked_lun, |
4323 | cmd->se_tfo->get_task_tag(cmd)); | |
c66ac9db | 4324 | |
a1d8b49a | 4325 | spin_lock_irqsave(&cmd->t_state_lock, cmd_flags); |
7d680f3b | 4326 | if (!(cmd->transport_state & CMD_T_DEV_ACTIVE)) { |
a1d8b49a | 4327 | spin_unlock_irqrestore(&cmd->t_state_lock, cmd_flags); |
c66ac9db NB |
4328 | goto check_cond; |
4329 | } | |
7d680f3b | 4330 | cmd->transport_state &= ~CMD_T_DEV_ACTIVE; |
c66ac9db | 4331 | transport_all_task_dev_remove_state(cmd); |
a1d8b49a | 4332 | spin_unlock_irqrestore(&cmd->t_state_lock, cmd_flags); |
c66ac9db NB |
4333 | |
4334 | transport_free_dev_tasks(cmd); | |
4335 | /* | |
4336 | * The Storage engine stopped this struct se_cmd before it was | |
4337 | * send to the fabric frontend for delivery back to the | |
4338 | * Initiator Node. Return this SCSI CDB back with an | |
4339 | * CHECK_CONDITION status. | |
4340 | */ | |
4341 | check_cond: | |
4342 | transport_send_check_condition_and_sense(cmd, | |
4343 | TCM_NON_EXISTENT_LUN, 0); | |
4344 | /* | |
4345 | * If the fabric frontend is waiting for this iscsi_cmd_t to | |
4346 | * be released, notify the waiting thread now that LU has | |
4347 | * finished accessing it. | |
4348 | */ | |
a1d8b49a | 4349 | spin_lock_irqsave(&cmd->t_state_lock, cmd_flags); |
7d680f3b | 4350 | if (cmd->transport_state & CMD_T_LUN_FE_STOP) { |
6708bb27 | 4351 | pr_debug("SE_LUN[%d] - Detected FE stop for" |
c66ac9db NB |
4352 | " struct se_cmd: %p ITT: 0x%08x\n", |
4353 | lun->unpacked_lun, | |
e3d6f909 | 4354 | cmd, cmd->se_tfo->get_task_tag(cmd)); |
c66ac9db | 4355 | |
a1d8b49a | 4356 | spin_unlock_irqrestore(&cmd->t_state_lock, |
c66ac9db NB |
4357 | cmd_flags); |
4358 | transport_cmd_check_stop(cmd, 1, 0); | |
a1d8b49a | 4359 | complete(&cmd->transport_lun_fe_stop_comp); |
c66ac9db NB |
4360 | spin_lock_irqsave(&lun->lun_cmd_lock, lun_flags); |
4361 | continue; | |
4362 | } | |
6708bb27 | 4363 | pr_debug("SE_LUN[%d] - ITT: 0x%08x finished processing\n", |
e3d6f909 | 4364 | lun->unpacked_lun, cmd->se_tfo->get_task_tag(cmd)); |
c66ac9db | 4365 | |
a1d8b49a | 4366 | spin_unlock_irqrestore(&cmd->t_state_lock, cmd_flags); |
c66ac9db NB |
4367 | spin_lock_irqsave(&lun->lun_cmd_lock, lun_flags); |
4368 | } | |
4369 | spin_unlock_irqrestore(&lun->lun_cmd_lock, lun_flags); | |
4370 | } | |
4371 | ||
4372 | static int transport_clear_lun_thread(void *p) | |
4373 | { | |
8359cf43 | 4374 | struct se_lun *lun = p; |
c66ac9db NB |
4375 | |
4376 | __transport_clear_lun_from_sessions(lun); | |
4377 | complete(&lun->lun_shutdown_comp); | |
4378 | ||
4379 | return 0; | |
4380 | } | |
4381 | ||
4382 | int transport_clear_lun_from_sessions(struct se_lun *lun) | |
4383 | { | |
4384 | struct task_struct *kt; | |
4385 | ||
5951146d | 4386 | kt = kthread_run(transport_clear_lun_thread, lun, |
c66ac9db NB |
4387 | "tcm_cl_%u", lun->unpacked_lun); |
4388 | if (IS_ERR(kt)) { | |
6708bb27 | 4389 | pr_err("Unable to start clear_lun thread\n"); |
e3d6f909 | 4390 | return PTR_ERR(kt); |
c66ac9db NB |
4391 | } |
4392 | wait_for_completion(&lun->lun_shutdown_comp); | |
4393 | ||
4394 | return 0; | |
4395 | } | |
4396 | ||
d14921d6 NB |
4397 | /** |
4398 | * transport_wait_for_tasks - wait for completion to occur | |
4399 | * @cmd: command to wait | |
c66ac9db | 4400 | * |
d14921d6 NB |
4401 | * Called from frontend fabric context to wait for storage engine |
4402 | * to pause and/or release frontend generated struct se_cmd. | |
c66ac9db | 4403 | */ |
a17f091d | 4404 | bool transport_wait_for_tasks(struct se_cmd *cmd) |
c66ac9db NB |
4405 | { |
4406 | unsigned long flags; | |
4407 | ||
a1d8b49a | 4408 | spin_lock_irqsave(&cmd->t_state_lock, flags); |
c8e31f26 AG |
4409 | if (!(cmd->se_cmd_flags & SCF_SE_LUN_CMD) && |
4410 | !(cmd->se_cmd_flags & SCF_SCSI_TMR_CDB)) { | |
d14921d6 | 4411 | spin_unlock_irqrestore(&cmd->t_state_lock, flags); |
a17f091d | 4412 | return false; |
d14921d6 NB |
4413 | } |
4414 | /* | |
4415 | * Only perform a possible wait_for_tasks if SCF_SUPPORTED_SAM_OPCODE | |
4416 | * has been set in transport_set_supported_SAM_opcode(). | |
4417 | */ | |
c8e31f26 AG |
4418 | if (!(cmd->se_cmd_flags & SCF_SUPPORTED_SAM_OPCODE) && |
4419 | !(cmd->se_cmd_flags & SCF_SCSI_TMR_CDB)) { | |
d14921d6 | 4420 | spin_unlock_irqrestore(&cmd->t_state_lock, flags); |
a17f091d | 4421 | return false; |
d14921d6 | 4422 | } |
c66ac9db NB |
4423 | /* |
4424 | * If we are already stopped due to an external event (ie: LUN shutdown) | |
4425 | * sleep until the connection can have the passed struct se_cmd back. | |
a1d8b49a | 4426 | * The cmd->transport_lun_stopped_sem will be upped by |
c66ac9db NB |
4427 | * transport_clear_lun_from_sessions() once the ConfigFS context caller |
4428 | * has completed its operation on the struct se_cmd. | |
4429 | */ | |
7d680f3b | 4430 | if (cmd->transport_state & CMD_T_LUN_STOP) { |
6708bb27 | 4431 | pr_debug("wait_for_tasks: Stopping" |
e3d6f909 | 4432 | " wait_for_completion(&cmd->t_tasktransport_lun_fe" |
c66ac9db | 4433 | "_stop_comp); for ITT: 0x%08x\n", |
e3d6f909 | 4434 | cmd->se_tfo->get_task_tag(cmd)); |
c66ac9db NB |
4435 | /* |
4436 | * There is a special case for WRITES where a FE exception + | |
4437 | * LUN shutdown means ConfigFS context is still sleeping on | |
4438 | * transport_lun_stop_comp in transport_lun_wait_for_tasks(). | |
4439 | * We go ahead and up transport_lun_stop_comp just to be sure | |
4440 | * here. | |
4441 | */ | |
a1d8b49a AG |
4442 | spin_unlock_irqrestore(&cmd->t_state_lock, flags); |
4443 | complete(&cmd->transport_lun_stop_comp); | |
4444 | wait_for_completion(&cmd->transport_lun_fe_stop_comp); | |
4445 | spin_lock_irqsave(&cmd->t_state_lock, flags); | |
c66ac9db NB |
4446 | |
4447 | transport_all_task_dev_remove_state(cmd); | |
4448 | /* | |
4449 | * At this point, the frontend who was the originator of this | |
4450 | * struct se_cmd, now owns the structure and can be released through | |
4451 | * normal means below. | |
4452 | */ | |
6708bb27 | 4453 | pr_debug("wait_for_tasks: Stopped" |
e3d6f909 | 4454 | " wait_for_completion(&cmd->t_tasktransport_lun_fe_" |
c66ac9db | 4455 | "stop_comp); for ITT: 0x%08x\n", |
e3d6f909 | 4456 | cmd->se_tfo->get_task_tag(cmd)); |
c66ac9db | 4457 | |
7d680f3b | 4458 | cmd->transport_state &= ~CMD_T_LUN_STOP; |
c66ac9db | 4459 | } |
7d680f3b | 4460 | |
3d28934a | 4461 | if (!(cmd->transport_state & CMD_T_ACTIVE)) { |
d14921d6 | 4462 | spin_unlock_irqrestore(&cmd->t_state_lock, flags); |
a17f091d | 4463 | return false; |
d14921d6 | 4464 | } |
c66ac9db | 4465 | |
7d680f3b | 4466 | cmd->transport_state |= CMD_T_STOP; |
c66ac9db | 4467 | |
6708bb27 | 4468 | pr_debug("wait_for_tasks: Stopping %p ITT: 0x%08x" |
7d680f3b | 4469 | " i_state: %d, t_state: %d, CMD_T_STOP\n", |
f2da9dbd CH |
4470 | cmd, cmd->se_tfo->get_task_tag(cmd), |
4471 | cmd->se_tfo->get_cmd_state(cmd), cmd->t_state); | |
c66ac9db | 4472 | |
a1d8b49a | 4473 | spin_unlock_irqrestore(&cmd->t_state_lock, flags); |
c66ac9db | 4474 | |
5951146d | 4475 | wake_up_interruptible(&cmd->se_dev->dev_queue_obj.thread_wq); |
c66ac9db | 4476 | |
a1d8b49a | 4477 | wait_for_completion(&cmd->t_transport_stop_comp); |
c66ac9db | 4478 | |
a1d8b49a | 4479 | spin_lock_irqsave(&cmd->t_state_lock, flags); |
7d680f3b | 4480 | cmd->transport_state &= ~(CMD_T_ACTIVE | CMD_T_STOP); |
c66ac9db | 4481 | |
6708bb27 | 4482 | pr_debug("wait_for_tasks: Stopped wait_for_compltion(" |
a1d8b49a | 4483 | "&cmd->t_transport_stop_comp) for ITT: 0x%08x\n", |
e3d6f909 | 4484 | cmd->se_tfo->get_task_tag(cmd)); |
c66ac9db | 4485 | |
d14921d6 | 4486 | spin_unlock_irqrestore(&cmd->t_state_lock, flags); |
a17f091d NB |
4487 | |
4488 | return true; | |
c66ac9db | 4489 | } |
d14921d6 | 4490 | EXPORT_SYMBOL(transport_wait_for_tasks); |
c66ac9db NB |
4491 | |
4492 | static int transport_get_sense_codes( | |
4493 | struct se_cmd *cmd, | |
4494 | u8 *asc, | |
4495 | u8 *ascq) | |
4496 | { | |
4497 | *asc = cmd->scsi_asc; | |
4498 | *ascq = cmd->scsi_ascq; | |
4499 | ||
4500 | return 0; | |
4501 | } | |
4502 | ||
4503 | static int transport_set_sense_codes( | |
4504 | struct se_cmd *cmd, | |
4505 | u8 asc, | |
4506 | u8 ascq) | |
4507 | { | |
4508 | cmd->scsi_asc = asc; | |
4509 | cmd->scsi_ascq = ascq; | |
4510 | ||
4511 | return 0; | |
4512 | } | |
4513 | ||
4514 | int transport_send_check_condition_and_sense( | |
4515 | struct se_cmd *cmd, | |
4516 | u8 reason, | |
4517 | int from_transport) | |
4518 | { | |
4519 | unsigned char *buffer = cmd->sense_buffer; | |
4520 | unsigned long flags; | |
4521 | int offset; | |
4522 | u8 asc = 0, ascq = 0; | |
4523 | ||
a1d8b49a | 4524 | spin_lock_irqsave(&cmd->t_state_lock, flags); |
c66ac9db | 4525 | if (cmd->se_cmd_flags & SCF_SENT_CHECK_CONDITION) { |
a1d8b49a | 4526 | spin_unlock_irqrestore(&cmd->t_state_lock, flags); |
c66ac9db NB |
4527 | return 0; |
4528 | } | |
4529 | cmd->se_cmd_flags |= SCF_SENT_CHECK_CONDITION; | |
a1d8b49a | 4530 | spin_unlock_irqrestore(&cmd->t_state_lock, flags); |
c66ac9db NB |
4531 | |
4532 | if (!reason && from_transport) | |
4533 | goto after_reason; | |
4534 | ||
4535 | if (!from_transport) | |
4536 | cmd->se_cmd_flags |= SCF_EMULATED_TASK_SENSE; | |
4537 | /* | |
4538 | * Data Segment and SenseLength of the fabric response PDU. | |
4539 | * | |
4540 | * TRANSPORT_SENSE_BUFFER is now set to SCSI_SENSE_BUFFERSIZE | |
4541 | * from include/scsi/scsi_cmnd.h | |
4542 | */ | |
e3d6f909 | 4543 | offset = cmd->se_tfo->set_fabric_sense_len(cmd, |
c66ac9db NB |
4544 | TRANSPORT_SENSE_BUFFER); |
4545 | /* | |
4546 | * Actual SENSE DATA, see SPC-3 7.23.2 SPC_SENSE_KEY_OFFSET uses | |
4547 | * SENSE KEY values from include/scsi/scsi.h | |
4548 | */ | |
4549 | switch (reason) { | |
4550 | case TCM_NON_EXISTENT_LUN: | |
eb39d340 NB |
4551 | /* CURRENT ERROR */ |
4552 | buffer[offset] = 0x70; | |
895f3022 | 4553 | buffer[offset+SPC_ADD_SENSE_LEN_OFFSET] = 10; |
eb39d340 NB |
4554 | /* ILLEGAL REQUEST */ |
4555 | buffer[offset+SPC_SENSE_KEY_OFFSET] = ILLEGAL_REQUEST; | |
4556 | /* LOGICAL UNIT NOT SUPPORTED */ | |
4557 | buffer[offset+SPC_ASC_KEY_OFFSET] = 0x25; | |
4558 | break; | |
c66ac9db NB |
4559 | case TCM_UNSUPPORTED_SCSI_OPCODE: |
4560 | case TCM_SECTOR_COUNT_TOO_MANY: | |
4561 | /* CURRENT ERROR */ | |
4562 | buffer[offset] = 0x70; | |
895f3022 | 4563 | buffer[offset+SPC_ADD_SENSE_LEN_OFFSET] = 10; |
c66ac9db NB |
4564 | /* ILLEGAL REQUEST */ |
4565 | buffer[offset+SPC_SENSE_KEY_OFFSET] = ILLEGAL_REQUEST; | |
4566 | /* INVALID COMMAND OPERATION CODE */ | |
4567 | buffer[offset+SPC_ASC_KEY_OFFSET] = 0x20; | |
4568 | break; | |
4569 | case TCM_UNKNOWN_MODE_PAGE: | |
4570 | /* CURRENT ERROR */ | |
4571 | buffer[offset] = 0x70; | |
895f3022 | 4572 | buffer[offset+SPC_ADD_SENSE_LEN_OFFSET] = 10; |
c66ac9db NB |
4573 | /* ILLEGAL REQUEST */ |
4574 | buffer[offset+SPC_SENSE_KEY_OFFSET] = ILLEGAL_REQUEST; | |
4575 | /* INVALID FIELD IN CDB */ | |
4576 | buffer[offset+SPC_ASC_KEY_OFFSET] = 0x24; | |
4577 | break; | |
4578 | case TCM_CHECK_CONDITION_ABORT_CMD: | |
4579 | /* CURRENT ERROR */ | |
4580 | buffer[offset] = 0x70; | |
895f3022 | 4581 | buffer[offset+SPC_ADD_SENSE_LEN_OFFSET] = 10; |
c66ac9db NB |
4582 | /* ABORTED COMMAND */ |
4583 | buffer[offset+SPC_SENSE_KEY_OFFSET] = ABORTED_COMMAND; | |
4584 | /* BUS DEVICE RESET FUNCTION OCCURRED */ | |
4585 | buffer[offset+SPC_ASC_KEY_OFFSET] = 0x29; | |
4586 | buffer[offset+SPC_ASCQ_KEY_OFFSET] = 0x03; | |
4587 | break; | |
4588 | case TCM_INCORRECT_AMOUNT_OF_DATA: | |
4589 | /* CURRENT ERROR */ | |
4590 | buffer[offset] = 0x70; | |
895f3022 | 4591 | buffer[offset+SPC_ADD_SENSE_LEN_OFFSET] = 10; |
c66ac9db NB |
4592 | /* ABORTED COMMAND */ |
4593 | buffer[offset+SPC_SENSE_KEY_OFFSET] = ABORTED_COMMAND; | |
4594 | /* WRITE ERROR */ | |
4595 | buffer[offset+SPC_ASC_KEY_OFFSET] = 0x0c; | |
4596 | /* NOT ENOUGH UNSOLICITED DATA */ | |
4597 | buffer[offset+SPC_ASCQ_KEY_OFFSET] = 0x0d; | |
4598 | break; | |
4599 | case TCM_INVALID_CDB_FIELD: | |
4600 | /* CURRENT ERROR */ | |
4601 | buffer[offset] = 0x70; | |
895f3022 | 4602 | buffer[offset+SPC_ADD_SENSE_LEN_OFFSET] = 10; |
9fbc8909 RD |
4603 | /* ILLEGAL REQUEST */ |
4604 | buffer[offset+SPC_SENSE_KEY_OFFSET] = ILLEGAL_REQUEST; | |
c66ac9db NB |
4605 | /* INVALID FIELD IN CDB */ |
4606 | buffer[offset+SPC_ASC_KEY_OFFSET] = 0x24; | |
4607 | break; | |
4608 | case TCM_INVALID_PARAMETER_LIST: | |
4609 | /* CURRENT ERROR */ | |
4610 | buffer[offset] = 0x70; | |
895f3022 | 4611 | buffer[offset+SPC_ADD_SENSE_LEN_OFFSET] = 10; |
9fbc8909 RD |
4612 | /* ILLEGAL REQUEST */ |
4613 | buffer[offset+SPC_SENSE_KEY_OFFSET] = ILLEGAL_REQUEST; | |
c66ac9db NB |
4614 | /* INVALID FIELD IN PARAMETER LIST */ |
4615 | buffer[offset+SPC_ASC_KEY_OFFSET] = 0x26; | |
4616 | break; | |
4617 | case TCM_UNEXPECTED_UNSOLICITED_DATA: | |
4618 | /* CURRENT ERROR */ | |
4619 | buffer[offset] = 0x70; | |
895f3022 | 4620 | buffer[offset+SPC_ADD_SENSE_LEN_OFFSET] = 10; |
c66ac9db NB |
4621 | /* ABORTED COMMAND */ |
4622 | buffer[offset+SPC_SENSE_KEY_OFFSET] = ABORTED_COMMAND; | |
4623 | /* WRITE ERROR */ | |
4624 | buffer[offset+SPC_ASC_KEY_OFFSET] = 0x0c; | |
4625 | /* UNEXPECTED_UNSOLICITED_DATA */ | |
4626 | buffer[offset+SPC_ASCQ_KEY_OFFSET] = 0x0c; | |
4627 | break; | |
4628 | case TCM_SERVICE_CRC_ERROR: | |
4629 | /* CURRENT ERROR */ | |
4630 | buffer[offset] = 0x70; | |
895f3022 | 4631 | buffer[offset+SPC_ADD_SENSE_LEN_OFFSET] = 10; |
c66ac9db NB |
4632 | /* ABORTED COMMAND */ |
4633 | buffer[offset+SPC_SENSE_KEY_OFFSET] = ABORTED_COMMAND; | |
4634 | /* PROTOCOL SERVICE CRC ERROR */ | |
4635 | buffer[offset+SPC_ASC_KEY_OFFSET] = 0x47; | |
4636 | /* N/A */ | |
4637 | buffer[offset+SPC_ASCQ_KEY_OFFSET] = 0x05; | |
4638 | break; | |
4639 | case TCM_SNACK_REJECTED: | |
4640 | /* CURRENT ERROR */ | |
4641 | buffer[offset] = 0x70; | |
895f3022 | 4642 | buffer[offset+SPC_ADD_SENSE_LEN_OFFSET] = 10; |
c66ac9db NB |
4643 | /* ABORTED COMMAND */ |
4644 | buffer[offset+SPC_SENSE_KEY_OFFSET] = ABORTED_COMMAND; | |
4645 | /* READ ERROR */ | |
4646 | buffer[offset+SPC_ASC_KEY_OFFSET] = 0x11; | |
4647 | /* FAILED RETRANSMISSION REQUEST */ | |
4648 | buffer[offset+SPC_ASCQ_KEY_OFFSET] = 0x13; | |
4649 | break; | |
4650 | case TCM_WRITE_PROTECTED: | |
4651 | /* CURRENT ERROR */ | |
4652 | buffer[offset] = 0x70; | |
895f3022 | 4653 | buffer[offset+SPC_ADD_SENSE_LEN_OFFSET] = 10; |
c66ac9db NB |
4654 | /* DATA PROTECT */ |
4655 | buffer[offset+SPC_SENSE_KEY_OFFSET] = DATA_PROTECT; | |
4656 | /* WRITE PROTECTED */ | |
4657 | buffer[offset+SPC_ASC_KEY_OFFSET] = 0x27; | |
4658 | break; | |
4659 | case TCM_CHECK_CONDITION_UNIT_ATTENTION: | |
4660 | /* CURRENT ERROR */ | |
4661 | buffer[offset] = 0x70; | |
895f3022 | 4662 | buffer[offset+SPC_ADD_SENSE_LEN_OFFSET] = 10; |
c66ac9db NB |
4663 | /* UNIT ATTENTION */ |
4664 | buffer[offset+SPC_SENSE_KEY_OFFSET] = UNIT_ATTENTION; | |
4665 | core_scsi3_ua_for_check_condition(cmd, &asc, &ascq); | |
4666 | buffer[offset+SPC_ASC_KEY_OFFSET] = asc; | |
4667 | buffer[offset+SPC_ASCQ_KEY_OFFSET] = ascq; | |
4668 | break; | |
4669 | case TCM_CHECK_CONDITION_NOT_READY: | |
4670 | /* CURRENT ERROR */ | |
4671 | buffer[offset] = 0x70; | |
895f3022 | 4672 | buffer[offset+SPC_ADD_SENSE_LEN_OFFSET] = 10; |
c66ac9db NB |
4673 | /* Not Ready */ |
4674 | buffer[offset+SPC_SENSE_KEY_OFFSET] = NOT_READY; | |
4675 | transport_get_sense_codes(cmd, &asc, &ascq); | |
4676 | buffer[offset+SPC_ASC_KEY_OFFSET] = asc; | |
4677 | buffer[offset+SPC_ASCQ_KEY_OFFSET] = ascq; | |
4678 | break; | |
4679 | case TCM_LOGICAL_UNIT_COMMUNICATION_FAILURE: | |
4680 | default: | |
4681 | /* CURRENT ERROR */ | |
4682 | buffer[offset] = 0x70; | |
895f3022 | 4683 | buffer[offset+SPC_ADD_SENSE_LEN_OFFSET] = 10; |
c66ac9db NB |
4684 | /* ILLEGAL REQUEST */ |
4685 | buffer[offset+SPC_SENSE_KEY_OFFSET] = ILLEGAL_REQUEST; | |
4686 | /* LOGICAL UNIT COMMUNICATION FAILURE */ | |
4687 | buffer[offset+SPC_ASC_KEY_OFFSET] = 0x80; | |
4688 | break; | |
4689 | } | |
4690 | /* | |
4691 | * This code uses linux/include/scsi/scsi.h SAM status codes! | |
4692 | */ | |
4693 | cmd->scsi_status = SAM_STAT_CHECK_CONDITION; | |
4694 | /* | |
4695 | * Automatically padded, this value is encoded in the fabric's | |
4696 | * data_length response PDU containing the SCSI defined sense data. | |
4697 | */ | |
4698 | cmd->scsi_sense_length = TRANSPORT_SENSE_BUFFER + offset; | |
4699 | ||
4700 | after_reason: | |
07bde79a | 4701 | return cmd->se_tfo->queue_status(cmd); |
c66ac9db NB |
4702 | } |
4703 | EXPORT_SYMBOL(transport_send_check_condition_and_sense); | |
4704 | ||
4705 | int transport_check_aborted_status(struct se_cmd *cmd, int send_status) | |
4706 | { | |
4707 | int ret = 0; | |
4708 | ||
7d680f3b | 4709 | if (cmd->transport_state & CMD_T_ABORTED) { |
6708bb27 | 4710 | if (!send_status || |
c66ac9db NB |
4711 | (cmd->se_cmd_flags & SCF_SENT_DELAYED_TAS)) |
4712 | return 1; | |
4713 | #if 0 | |
6708bb27 | 4714 | pr_debug("Sending delayed SAM_STAT_TASK_ABORTED" |
c66ac9db | 4715 | " status for CDB: 0x%02x ITT: 0x%08x\n", |
a1d8b49a | 4716 | cmd->t_task_cdb[0], |
e3d6f909 | 4717 | cmd->se_tfo->get_task_tag(cmd)); |
c66ac9db NB |
4718 | #endif |
4719 | cmd->se_cmd_flags |= SCF_SENT_DELAYED_TAS; | |
e3d6f909 | 4720 | cmd->se_tfo->queue_status(cmd); |
c66ac9db NB |
4721 | ret = 1; |
4722 | } | |
4723 | return ret; | |
4724 | } | |
4725 | EXPORT_SYMBOL(transport_check_aborted_status); | |
4726 | ||
4727 | void transport_send_task_abort(struct se_cmd *cmd) | |
4728 | { | |
c252f003 NB |
4729 | unsigned long flags; |
4730 | ||
4731 | spin_lock_irqsave(&cmd->t_state_lock, flags); | |
4732 | if (cmd->se_cmd_flags & SCF_SENT_CHECK_CONDITION) { | |
4733 | spin_unlock_irqrestore(&cmd->t_state_lock, flags); | |
4734 | return; | |
4735 | } | |
4736 | spin_unlock_irqrestore(&cmd->t_state_lock, flags); | |
4737 | ||
c66ac9db NB |
4738 | /* |
4739 | * If there are still expected incoming fabric WRITEs, we wait | |
4740 | * until until they have completed before sending a TASK_ABORTED | |
4741 | * response. This response with TASK_ABORTED status will be | |
4742 | * queued back to fabric module by transport_check_aborted_status(). | |
4743 | */ | |
4744 | if (cmd->data_direction == DMA_TO_DEVICE) { | |
e3d6f909 | 4745 | if (cmd->se_tfo->write_pending_status(cmd) != 0) { |
7d680f3b | 4746 | cmd->transport_state |= CMD_T_ABORTED; |
c66ac9db | 4747 | smp_mb__after_atomic_inc(); |
c66ac9db NB |
4748 | } |
4749 | } | |
4750 | cmd->scsi_status = SAM_STAT_TASK_ABORTED; | |
4751 | #if 0 | |
6708bb27 | 4752 | pr_debug("Setting SAM_STAT_TASK_ABORTED status for CDB: 0x%02x," |
a1d8b49a | 4753 | " ITT: 0x%08x\n", cmd->t_task_cdb[0], |
e3d6f909 | 4754 | cmd->se_tfo->get_task_tag(cmd)); |
c66ac9db | 4755 | #endif |
e3d6f909 | 4756 | cmd->se_tfo->queue_status(cmd); |
c66ac9db NB |
4757 | } |
4758 | ||
e26d99ae | 4759 | static int transport_generic_do_tmr(struct se_cmd *cmd) |
c66ac9db | 4760 | { |
5951146d | 4761 | struct se_device *dev = cmd->se_dev; |
c66ac9db NB |
4762 | struct se_tmr_req *tmr = cmd->se_tmr_req; |
4763 | int ret; | |
4764 | ||
4765 | switch (tmr->function) { | |
5c6cd613 | 4766 | case TMR_ABORT_TASK: |
3d28934a | 4767 | core_tmr_abort_task(dev, tmr, cmd->se_sess); |
c66ac9db | 4768 | break; |
5c6cd613 NB |
4769 | case TMR_ABORT_TASK_SET: |
4770 | case TMR_CLEAR_ACA: | |
4771 | case TMR_CLEAR_TASK_SET: | |
c66ac9db NB |
4772 | tmr->response = TMR_TASK_MGMT_FUNCTION_NOT_SUPPORTED; |
4773 | break; | |
5c6cd613 | 4774 | case TMR_LUN_RESET: |
c66ac9db NB |
4775 | ret = core_tmr_lun_reset(dev, tmr, NULL, NULL); |
4776 | tmr->response = (!ret) ? TMR_FUNCTION_COMPLETE : | |
4777 | TMR_FUNCTION_REJECTED; | |
4778 | break; | |
5c6cd613 | 4779 | case TMR_TARGET_WARM_RESET: |
c66ac9db NB |
4780 | tmr->response = TMR_FUNCTION_REJECTED; |
4781 | break; | |
5c6cd613 | 4782 | case TMR_TARGET_COLD_RESET: |
c66ac9db NB |
4783 | tmr->response = TMR_FUNCTION_REJECTED; |
4784 | break; | |
c66ac9db | 4785 | default: |
6708bb27 | 4786 | pr_err("Uknown TMR function: 0x%02x.\n", |
c66ac9db NB |
4787 | tmr->function); |
4788 | tmr->response = TMR_FUNCTION_REJECTED; | |
4789 | break; | |
4790 | } | |
4791 | ||
4792 | cmd->t_state = TRANSPORT_ISTATE_PROCESSING; | |
e3d6f909 | 4793 | cmd->se_tfo->queue_tm_rsp(cmd); |
c66ac9db | 4794 | |
b7b8bef7 | 4795 | transport_cmd_check_stop_to_fabric(cmd); |
c66ac9db NB |
4796 | return 0; |
4797 | } | |
4798 | ||
c66ac9db NB |
4799 | /* transport_processing_thread(): |
4800 | * | |
4801 | * | |
4802 | */ | |
4803 | static int transport_processing_thread(void *param) | |
4804 | { | |
5951146d | 4805 | int ret; |
c66ac9db | 4806 | struct se_cmd *cmd; |
8359cf43 | 4807 | struct se_device *dev = param; |
c66ac9db | 4808 | |
c66ac9db | 4809 | while (!kthread_should_stop()) { |
e3d6f909 AG |
4810 | ret = wait_event_interruptible(dev->dev_queue_obj.thread_wq, |
4811 | atomic_read(&dev->dev_queue_obj.queue_cnt) || | |
c66ac9db NB |
4812 | kthread_should_stop()); |
4813 | if (ret < 0) | |
4814 | goto out; | |
4815 | ||
c66ac9db | 4816 | get_cmd: |
5951146d AG |
4817 | cmd = transport_get_cmd_from_queue(&dev->dev_queue_obj); |
4818 | if (!cmd) | |
c66ac9db NB |
4819 | continue; |
4820 | ||
5951146d | 4821 | switch (cmd->t_state) { |
680b73c5 CH |
4822 | case TRANSPORT_NEW_CMD: |
4823 | BUG(); | |
4824 | break; | |
c66ac9db | 4825 | case TRANSPORT_NEW_CMD_MAP: |
6708bb27 AG |
4826 | if (!cmd->se_tfo->new_cmd_map) { |
4827 | pr_err("cmd->se_tfo->new_cmd_map is" | |
c66ac9db NB |
4828 | " NULL for TRANSPORT_NEW_CMD_MAP\n"); |
4829 | BUG(); | |
4830 | } | |
e3d6f909 | 4831 | ret = cmd->se_tfo->new_cmd_map(cmd); |
c66ac9db | 4832 | if (ret < 0) { |
03e98c9e | 4833 | transport_generic_request_failure(cmd); |
c66ac9db NB |
4834 | break; |
4835 | } | |
c66ac9db | 4836 | ret = transport_generic_new_cmd(cmd); |
f147abb4 | 4837 | if (ret < 0) { |
03e98c9e NB |
4838 | transport_generic_request_failure(cmd); |
4839 | break; | |
c66ac9db NB |
4840 | } |
4841 | break; | |
4842 | case TRANSPORT_PROCESS_WRITE: | |
4843 | transport_generic_process_write(cmd); | |
4844 | break; | |
c66ac9db NB |
4845 | case TRANSPORT_PROCESS_TMR: |
4846 | transport_generic_do_tmr(cmd); | |
4847 | break; | |
07bde79a | 4848 | case TRANSPORT_COMPLETE_QF_WP: |
e057f533 CH |
4849 | transport_write_pending_qf(cmd); |
4850 | break; | |
4851 | case TRANSPORT_COMPLETE_QF_OK: | |
4852 | transport_complete_qf(cmd); | |
07bde79a | 4853 | break; |
c66ac9db | 4854 | default: |
f2da9dbd CH |
4855 | pr_err("Unknown t_state: %d for ITT: 0x%08x " |
4856 | "i_state: %d on SE LUN: %u\n", | |
4857 | cmd->t_state, | |
e3d6f909 AG |
4858 | cmd->se_tfo->get_task_tag(cmd), |
4859 | cmd->se_tfo->get_cmd_state(cmd), | |
4860 | cmd->se_lun->unpacked_lun); | |
c66ac9db NB |
4861 | BUG(); |
4862 | } | |
4863 | ||
4864 | goto get_cmd; | |
4865 | } | |
4866 | ||
4867 | out: | |
ce8762f6 NB |
4868 | WARN_ON(!list_empty(&dev->state_task_list)); |
4869 | WARN_ON(!list_empty(&dev->dev_queue_obj.qobj_list)); | |
c66ac9db NB |
4870 | dev->process_thread = NULL; |
4871 | return 0; | |
4872 | } |