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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> |
c66ac9db NB |
40 | #include <asm/unaligned.h> |
41 | #include <net/sock.h> | |
42 | #include <net/tcp.h> | |
43 | #include <scsi/scsi.h> | |
44 | #include <scsi/scsi_cmnd.h> | |
e66ecd50 | 45 | #include <scsi/scsi_tcq.h> |
c66ac9db NB |
46 | |
47 | #include <target/target_core_base.h> | |
48 | #include <target/target_core_device.h> | |
49 | #include <target/target_core_tmr.h> | |
50 | #include <target/target_core_tpg.h> | |
51 | #include <target/target_core_transport.h> | |
52 | #include <target/target_core_fabric_ops.h> | |
53 | #include <target/target_core_configfs.h> | |
54 | ||
55 | #include "target_core_alua.h" | |
5bda90c8 | 56 | #include "target_core_cdb.h" |
c66ac9db NB |
57 | #include "target_core_hba.h" |
58 | #include "target_core_pr.h" | |
c66ac9db NB |
59 | #include "target_core_ua.h" |
60 | ||
e3d6f909 | 61 | static int sub_api_initialized; |
c66ac9db | 62 | |
35e0e757 | 63 | static struct workqueue_struct *target_completion_wq; |
c66ac9db NB |
64 | static struct kmem_cache *se_sess_cache; |
65 | struct kmem_cache *se_tmr_req_cache; | |
66 | struct kmem_cache *se_ua_cache; | |
c66ac9db NB |
67 | struct kmem_cache *t10_pr_reg_cache; |
68 | struct kmem_cache *t10_alua_lu_gp_cache; | |
69 | struct kmem_cache *t10_alua_lu_gp_mem_cache; | |
70 | struct kmem_cache *t10_alua_tg_pt_gp_cache; | |
71 | struct kmem_cache *t10_alua_tg_pt_gp_mem_cache; | |
72 | ||
c66ac9db | 73 | static int transport_generic_write_pending(struct se_cmd *); |
5951146d | 74 | static int transport_processing_thread(void *param); |
c66ac9db NB |
75 | static int __transport_execute_tasks(struct se_device *dev); |
76 | static void transport_complete_task_attr(struct se_cmd *cmd); | |
07bde79a | 77 | static void transport_handle_queue_full(struct se_cmd *cmd, |
e057f533 | 78 | struct se_device *dev); |
c66ac9db | 79 | static void transport_free_dev_tasks(struct se_cmd *cmd); |
05d1c7c0 | 80 | static int transport_generic_get_mem(struct se_cmd *cmd); |
39c05f32 | 81 | static void transport_put_cmd(struct se_cmd *cmd); |
3df8d40b | 82 | static void transport_remove_cmd_from_queue(struct se_cmd *cmd); |
c66ac9db | 83 | static int transport_set_sense_codes(struct se_cmd *cmd, u8 asc, u8 ascq); |
03e98c9e | 84 | static void transport_generic_request_failure(struct se_cmd *); |
35e0e757 | 85 | static void target_complete_ok_work(struct work_struct *work); |
c66ac9db | 86 | |
e3d6f909 | 87 | int init_se_kmem_caches(void) |
c66ac9db | 88 | { |
c66ac9db NB |
89 | se_tmr_req_cache = kmem_cache_create("se_tmr_cache", |
90 | sizeof(struct se_tmr_req), __alignof__(struct se_tmr_req), | |
91 | 0, NULL); | |
6708bb27 AG |
92 | if (!se_tmr_req_cache) { |
93 | pr_err("kmem_cache_create() for struct se_tmr_req" | |
c66ac9db | 94 | " failed\n"); |
97c34f3b | 95 | goto out; |
c66ac9db NB |
96 | } |
97 | se_sess_cache = kmem_cache_create("se_sess_cache", | |
98 | sizeof(struct se_session), __alignof__(struct se_session), | |
99 | 0, NULL); | |
6708bb27 AG |
100 | if (!se_sess_cache) { |
101 | pr_err("kmem_cache_create() for struct se_session" | |
c66ac9db | 102 | " failed\n"); |
35e0e757 | 103 | goto out_free_tmr_req_cache; |
c66ac9db NB |
104 | } |
105 | se_ua_cache = kmem_cache_create("se_ua_cache", | |
106 | sizeof(struct se_ua), __alignof__(struct se_ua), | |
107 | 0, NULL); | |
6708bb27 AG |
108 | if (!se_ua_cache) { |
109 | pr_err("kmem_cache_create() for struct se_ua failed\n"); | |
35e0e757 | 110 | goto out_free_sess_cache; |
c66ac9db | 111 | } |
c66ac9db NB |
112 | t10_pr_reg_cache = kmem_cache_create("t10_pr_reg_cache", |
113 | sizeof(struct t10_pr_registration), | |
114 | __alignof__(struct t10_pr_registration), 0, NULL); | |
6708bb27 AG |
115 | if (!t10_pr_reg_cache) { |
116 | pr_err("kmem_cache_create() for struct t10_pr_registration" | |
c66ac9db | 117 | " failed\n"); |
35e0e757 | 118 | goto out_free_ua_cache; |
c66ac9db NB |
119 | } |
120 | t10_alua_lu_gp_cache = kmem_cache_create("t10_alua_lu_gp_cache", | |
121 | sizeof(struct t10_alua_lu_gp), __alignof__(struct t10_alua_lu_gp), | |
122 | 0, NULL); | |
6708bb27 AG |
123 | if (!t10_alua_lu_gp_cache) { |
124 | pr_err("kmem_cache_create() for t10_alua_lu_gp_cache" | |
c66ac9db | 125 | " failed\n"); |
35e0e757 | 126 | goto out_free_pr_reg_cache; |
c66ac9db NB |
127 | } |
128 | t10_alua_lu_gp_mem_cache = kmem_cache_create("t10_alua_lu_gp_mem_cache", | |
129 | sizeof(struct t10_alua_lu_gp_member), | |
130 | __alignof__(struct t10_alua_lu_gp_member), 0, NULL); | |
6708bb27 AG |
131 | if (!t10_alua_lu_gp_mem_cache) { |
132 | pr_err("kmem_cache_create() for t10_alua_lu_gp_mem_" | |
c66ac9db | 133 | "cache failed\n"); |
35e0e757 | 134 | goto out_free_lu_gp_cache; |
c66ac9db NB |
135 | } |
136 | t10_alua_tg_pt_gp_cache = kmem_cache_create("t10_alua_tg_pt_gp_cache", | |
137 | sizeof(struct t10_alua_tg_pt_gp), | |
138 | __alignof__(struct t10_alua_tg_pt_gp), 0, NULL); | |
6708bb27 AG |
139 | if (!t10_alua_tg_pt_gp_cache) { |
140 | pr_err("kmem_cache_create() for t10_alua_tg_pt_gp_" | |
c66ac9db | 141 | "cache failed\n"); |
35e0e757 | 142 | goto out_free_lu_gp_mem_cache; |
c66ac9db NB |
143 | } |
144 | t10_alua_tg_pt_gp_mem_cache = kmem_cache_create( | |
145 | "t10_alua_tg_pt_gp_mem_cache", | |
146 | sizeof(struct t10_alua_tg_pt_gp_member), | |
147 | __alignof__(struct t10_alua_tg_pt_gp_member), | |
148 | 0, NULL); | |
6708bb27 AG |
149 | if (!t10_alua_tg_pt_gp_mem_cache) { |
150 | pr_err("kmem_cache_create() for t10_alua_tg_pt_gp_" | |
c66ac9db | 151 | "mem_t failed\n"); |
35e0e757 | 152 | goto out_free_tg_pt_gp_cache; |
c66ac9db NB |
153 | } |
154 | ||
35e0e757 CH |
155 | target_completion_wq = alloc_workqueue("target_completion", |
156 | WQ_MEM_RECLAIM, 0); | |
157 | if (!target_completion_wq) | |
158 | goto out_free_tg_pt_gp_mem_cache; | |
159 | ||
c66ac9db | 160 | return 0; |
35e0e757 CH |
161 | |
162 | out_free_tg_pt_gp_mem_cache: | |
163 | kmem_cache_destroy(t10_alua_tg_pt_gp_mem_cache); | |
164 | out_free_tg_pt_gp_cache: | |
165 | kmem_cache_destroy(t10_alua_tg_pt_gp_cache); | |
166 | out_free_lu_gp_mem_cache: | |
167 | kmem_cache_destroy(t10_alua_lu_gp_mem_cache); | |
168 | out_free_lu_gp_cache: | |
169 | kmem_cache_destroy(t10_alua_lu_gp_cache); | |
170 | out_free_pr_reg_cache: | |
171 | kmem_cache_destroy(t10_pr_reg_cache); | |
172 | out_free_ua_cache: | |
173 | kmem_cache_destroy(se_ua_cache); | |
174 | out_free_sess_cache: | |
175 | kmem_cache_destroy(se_sess_cache); | |
176 | out_free_tmr_req_cache: | |
177 | kmem_cache_destroy(se_tmr_req_cache); | |
c66ac9db | 178 | out: |
e3d6f909 | 179 | return -ENOMEM; |
c66ac9db NB |
180 | } |
181 | ||
e3d6f909 | 182 | void release_se_kmem_caches(void) |
c66ac9db | 183 | { |
35e0e757 | 184 | destroy_workqueue(target_completion_wq); |
c66ac9db NB |
185 | kmem_cache_destroy(se_tmr_req_cache); |
186 | kmem_cache_destroy(se_sess_cache); | |
187 | kmem_cache_destroy(se_ua_cache); | |
c66ac9db NB |
188 | kmem_cache_destroy(t10_pr_reg_cache); |
189 | kmem_cache_destroy(t10_alua_lu_gp_cache); | |
190 | kmem_cache_destroy(t10_alua_lu_gp_mem_cache); | |
191 | kmem_cache_destroy(t10_alua_tg_pt_gp_cache); | |
192 | kmem_cache_destroy(t10_alua_tg_pt_gp_mem_cache); | |
c66ac9db NB |
193 | } |
194 | ||
e3d6f909 AG |
195 | /* This code ensures unique mib indexes are handed out. */ |
196 | static DEFINE_SPINLOCK(scsi_mib_index_lock); | |
197 | static u32 scsi_mib_index[SCSI_INDEX_TYPE_MAX]; | |
e89d15ee NB |
198 | |
199 | /* | |
200 | * Allocate a new row index for the entry type specified | |
201 | */ | |
202 | u32 scsi_get_new_index(scsi_index_t type) | |
203 | { | |
204 | u32 new_index; | |
205 | ||
e3d6f909 | 206 | BUG_ON((type < 0) || (type >= SCSI_INDEX_TYPE_MAX)); |
e89d15ee | 207 | |
e3d6f909 AG |
208 | spin_lock(&scsi_mib_index_lock); |
209 | new_index = ++scsi_mib_index[type]; | |
210 | spin_unlock(&scsi_mib_index_lock); | |
e89d15ee NB |
211 | |
212 | return new_index; | |
213 | } | |
214 | ||
c66ac9db NB |
215 | void transport_init_queue_obj(struct se_queue_obj *qobj) |
216 | { | |
217 | atomic_set(&qobj->queue_cnt, 0); | |
218 | INIT_LIST_HEAD(&qobj->qobj_list); | |
219 | init_waitqueue_head(&qobj->thread_wq); | |
220 | spin_lock_init(&qobj->cmd_queue_lock); | |
221 | } | |
222 | EXPORT_SYMBOL(transport_init_queue_obj); | |
223 | ||
dbc5623e | 224 | void transport_subsystem_check_init(void) |
c66ac9db NB |
225 | { |
226 | int ret; | |
227 | ||
dbc5623e NB |
228 | if (sub_api_initialized) |
229 | return; | |
230 | ||
c66ac9db NB |
231 | ret = request_module("target_core_iblock"); |
232 | if (ret != 0) | |
6708bb27 | 233 | pr_err("Unable to load target_core_iblock\n"); |
c66ac9db NB |
234 | |
235 | ret = request_module("target_core_file"); | |
236 | if (ret != 0) | |
6708bb27 | 237 | pr_err("Unable to load target_core_file\n"); |
c66ac9db NB |
238 | |
239 | ret = request_module("target_core_pscsi"); | |
240 | if (ret != 0) | |
6708bb27 | 241 | pr_err("Unable to load target_core_pscsi\n"); |
c66ac9db NB |
242 | |
243 | ret = request_module("target_core_stgt"); | |
244 | if (ret != 0) | |
6708bb27 | 245 | pr_err("Unable to load target_core_stgt\n"); |
c66ac9db | 246 | |
e3d6f909 | 247 | sub_api_initialized = 1; |
dbc5623e | 248 | return; |
c66ac9db NB |
249 | } |
250 | ||
251 | struct se_session *transport_init_session(void) | |
252 | { | |
253 | struct se_session *se_sess; | |
254 | ||
255 | se_sess = kmem_cache_zalloc(se_sess_cache, GFP_KERNEL); | |
6708bb27 AG |
256 | if (!se_sess) { |
257 | pr_err("Unable to allocate struct se_session from" | |
c66ac9db NB |
258 | " se_sess_cache\n"); |
259 | return ERR_PTR(-ENOMEM); | |
260 | } | |
261 | INIT_LIST_HEAD(&se_sess->sess_list); | |
262 | INIT_LIST_HEAD(&se_sess->sess_acl_list); | |
a17f091d NB |
263 | INIT_LIST_HEAD(&se_sess->sess_cmd_list); |
264 | INIT_LIST_HEAD(&se_sess->sess_wait_list); | |
265 | spin_lock_init(&se_sess->sess_cmd_lock); | |
c66ac9db NB |
266 | |
267 | return se_sess; | |
268 | } | |
269 | EXPORT_SYMBOL(transport_init_session); | |
270 | ||
271 | /* | |
272 | * Called with spin_lock_bh(&struct se_portal_group->session_lock called. | |
273 | */ | |
274 | void __transport_register_session( | |
275 | struct se_portal_group *se_tpg, | |
276 | struct se_node_acl *se_nacl, | |
277 | struct se_session *se_sess, | |
278 | void *fabric_sess_ptr) | |
279 | { | |
280 | unsigned char buf[PR_REG_ISID_LEN]; | |
281 | ||
282 | se_sess->se_tpg = se_tpg; | |
283 | se_sess->fabric_sess_ptr = fabric_sess_ptr; | |
284 | /* | |
285 | * Used by struct se_node_acl's under ConfigFS to locate active se_session-t | |
286 | * | |
287 | * Only set for struct se_session's that will actually be moving I/O. | |
288 | * eg: *NOT* discovery sessions. | |
289 | */ | |
290 | if (se_nacl) { | |
291 | /* | |
292 | * If the fabric module supports an ISID based TransportID, | |
293 | * save this value in binary from the fabric I_T Nexus now. | |
294 | */ | |
e3d6f909 | 295 | if (se_tpg->se_tpg_tfo->sess_get_initiator_sid != NULL) { |
c66ac9db | 296 | memset(&buf[0], 0, PR_REG_ISID_LEN); |
e3d6f909 | 297 | se_tpg->se_tpg_tfo->sess_get_initiator_sid(se_sess, |
c66ac9db NB |
298 | &buf[0], PR_REG_ISID_LEN); |
299 | se_sess->sess_bin_isid = get_unaligned_be64(&buf[0]); | |
300 | } | |
301 | spin_lock_irq(&se_nacl->nacl_sess_lock); | |
302 | /* | |
303 | * The se_nacl->nacl_sess pointer will be set to the | |
304 | * last active I_T Nexus for each struct se_node_acl. | |
305 | */ | |
306 | se_nacl->nacl_sess = se_sess; | |
307 | ||
308 | list_add_tail(&se_sess->sess_acl_list, | |
309 | &se_nacl->acl_sess_list); | |
310 | spin_unlock_irq(&se_nacl->nacl_sess_lock); | |
311 | } | |
312 | list_add_tail(&se_sess->sess_list, &se_tpg->tpg_sess_list); | |
313 | ||
6708bb27 | 314 | pr_debug("TARGET_CORE[%s]: Registered fabric_sess_ptr: %p\n", |
e3d6f909 | 315 | se_tpg->se_tpg_tfo->get_fabric_name(), se_sess->fabric_sess_ptr); |
c66ac9db NB |
316 | } |
317 | EXPORT_SYMBOL(__transport_register_session); | |
318 | ||
319 | void transport_register_session( | |
320 | struct se_portal_group *se_tpg, | |
321 | struct se_node_acl *se_nacl, | |
322 | struct se_session *se_sess, | |
323 | void *fabric_sess_ptr) | |
324 | { | |
325 | spin_lock_bh(&se_tpg->session_lock); | |
326 | __transport_register_session(se_tpg, se_nacl, se_sess, fabric_sess_ptr); | |
327 | spin_unlock_bh(&se_tpg->session_lock); | |
328 | } | |
329 | EXPORT_SYMBOL(transport_register_session); | |
330 | ||
331 | void transport_deregister_session_configfs(struct se_session *se_sess) | |
332 | { | |
333 | struct se_node_acl *se_nacl; | |
23388864 | 334 | unsigned long flags; |
c66ac9db NB |
335 | /* |
336 | * Used by struct se_node_acl's under ConfigFS to locate active struct se_session | |
337 | */ | |
338 | se_nacl = se_sess->se_node_acl; | |
6708bb27 | 339 | if (se_nacl) { |
23388864 | 340 | spin_lock_irqsave(&se_nacl->nacl_sess_lock, flags); |
c66ac9db NB |
341 | list_del(&se_sess->sess_acl_list); |
342 | /* | |
343 | * If the session list is empty, then clear the pointer. | |
344 | * Otherwise, set the struct se_session pointer from the tail | |
345 | * element of the per struct se_node_acl active session list. | |
346 | */ | |
347 | if (list_empty(&se_nacl->acl_sess_list)) | |
348 | se_nacl->nacl_sess = NULL; | |
349 | else { | |
350 | se_nacl->nacl_sess = container_of( | |
351 | se_nacl->acl_sess_list.prev, | |
352 | struct se_session, sess_acl_list); | |
353 | } | |
23388864 | 354 | spin_unlock_irqrestore(&se_nacl->nacl_sess_lock, flags); |
c66ac9db NB |
355 | } |
356 | } | |
357 | EXPORT_SYMBOL(transport_deregister_session_configfs); | |
358 | ||
359 | void transport_free_session(struct se_session *se_sess) | |
360 | { | |
361 | kmem_cache_free(se_sess_cache, se_sess); | |
362 | } | |
363 | EXPORT_SYMBOL(transport_free_session); | |
364 | ||
365 | void transport_deregister_session(struct se_session *se_sess) | |
366 | { | |
367 | struct se_portal_group *se_tpg = se_sess->se_tpg; | |
368 | struct se_node_acl *se_nacl; | |
e63a8e19 | 369 | unsigned long flags; |
c66ac9db | 370 | |
6708bb27 | 371 | if (!se_tpg) { |
c66ac9db NB |
372 | transport_free_session(se_sess); |
373 | return; | |
374 | } | |
c66ac9db | 375 | |
e63a8e19 | 376 | spin_lock_irqsave(&se_tpg->session_lock, flags); |
c66ac9db NB |
377 | list_del(&se_sess->sess_list); |
378 | se_sess->se_tpg = NULL; | |
379 | se_sess->fabric_sess_ptr = NULL; | |
e63a8e19 | 380 | spin_unlock_irqrestore(&se_tpg->session_lock, flags); |
c66ac9db NB |
381 | |
382 | /* | |
383 | * Determine if we need to do extra work for this initiator node's | |
384 | * struct se_node_acl if it had been previously dynamically generated. | |
385 | */ | |
386 | se_nacl = se_sess->se_node_acl; | |
6708bb27 | 387 | if (se_nacl) { |
e63a8e19 | 388 | spin_lock_irqsave(&se_tpg->acl_node_lock, flags); |
c66ac9db | 389 | if (se_nacl->dynamic_node_acl) { |
6708bb27 AG |
390 | if (!se_tpg->se_tpg_tfo->tpg_check_demo_mode_cache( |
391 | se_tpg)) { | |
c66ac9db NB |
392 | list_del(&se_nacl->acl_list); |
393 | se_tpg->num_node_acls--; | |
e63a8e19 | 394 | spin_unlock_irqrestore(&se_tpg->acl_node_lock, flags); |
c66ac9db NB |
395 | |
396 | core_tpg_wait_for_nacl_pr_ref(se_nacl); | |
c66ac9db | 397 | core_free_device_list_for_node(se_nacl, se_tpg); |
e3d6f909 | 398 | se_tpg->se_tpg_tfo->tpg_release_fabric_acl(se_tpg, |
c66ac9db | 399 | se_nacl); |
e63a8e19 | 400 | spin_lock_irqsave(&se_tpg->acl_node_lock, flags); |
c66ac9db NB |
401 | } |
402 | } | |
e63a8e19 | 403 | spin_unlock_irqrestore(&se_tpg->acl_node_lock, flags); |
c66ac9db NB |
404 | } |
405 | ||
406 | transport_free_session(se_sess); | |
407 | ||
6708bb27 | 408 | pr_debug("TARGET_CORE[%s]: Deregistered fabric_sess\n", |
e3d6f909 | 409 | se_tpg->se_tpg_tfo->get_fabric_name()); |
c66ac9db NB |
410 | } |
411 | EXPORT_SYMBOL(transport_deregister_session); | |
412 | ||
413 | /* | |
a1d8b49a | 414 | * Called with cmd->t_state_lock held. |
c66ac9db NB |
415 | */ |
416 | static void transport_all_task_dev_remove_state(struct se_cmd *cmd) | |
417 | { | |
42bf829e | 418 | struct se_device *dev = cmd->se_dev; |
c66ac9db NB |
419 | struct se_task *task; |
420 | unsigned long flags; | |
421 | ||
42bf829e CH |
422 | if (!dev) |
423 | return; | |
c66ac9db | 424 | |
42bf829e | 425 | list_for_each_entry(task, &cmd->t_task_list, t_list) { |
6c76bf95 | 426 | if (task->task_flags & TF_ACTIVE) |
c66ac9db NB |
427 | continue; |
428 | ||
6708bb27 | 429 | if (!atomic_read(&task->task_state_active)) |
c66ac9db NB |
430 | continue; |
431 | ||
432 | spin_lock_irqsave(&dev->execute_task_lock, flags); | |
433 | list_del(&task->t_state_list); | |
6708bb27 AG |
434 | pr_debug("Removed ITT: 0x%08x dev: %p task[%p]\n", |
435 | cmd->se_tfo->get_task_tag(cmd), dev, task); | |
c66ac9db NB |
436 | spin_unlock_irqrestore(&dev->execute_task_lock, flags); |
437 | ||
438 | atomic_set(&task->task_state_active, 0); | |
a1d8b49a | 439 | atomic_dec(&cmd->t_task_cdbs_ex_left); |
c66ac9db NB |
440 | } |
441 | } | |
442 | ||
443 | /* transport_cmd_check_stop(): | |
444 | * | |
445 | * 'transport_off = 1' determines if t_transport_active should be cleared. | |
446 | * 'transport_off = 2' determines if task_dev_state should be removed. | |
447 | * | |
448 | * A non-zero u8 t_state sets cmd->t_state. | |
449 | * Returns 1 when command is stopped, else 0. | |
450 | */ | |
451 | static int transport_cmd_check_stop( | |
452 | struct se_cmd *cmd, | |
453 | int transport_off, | |
454 | u8 t_state) | |
455 | { | |
456 | unsigned long flags; | |
457 | ||
a1d8b49a | 458 | spin_lock_irqsave(&cmd->t_state_lock, flags); |
c66ac9db NB |
459 | /* |
460 | * Determine if IOCTL context caller in requesting the stopping of this | |
461 | * command for LUN shutdown purposes. | |
462 | */ | |
a1d8b49a | 463 | if (atomic_read(&cmd->transport_lun_stop)) { |
6708bb27 | 464 | pr_debug("%s:%d atomic_read(&cmd->transport_lun_stop)" |
c66ac9db | 465 | " == TRUE for ITT: 0x%08x\n", __func__, __LINE__, |
e3d6f909 | 466 | cmd->se_tfo->get_task_tag(cmd)); |
c66ac9db | 467 | |
a1d8b49a | 468 | atomic_set(&cmd->t_transport_active, 0); |
c66ac9db NB |
469 | if (transport_off == 2) |
470 | transport_all_task_dev_remove_state(cmd); | |
a1d8b49a | 471 | spin_unlock_irqrestore(&cmd->t_state_lock, flags); |
c66ac9db | 472 | |
a1d8b49a | 473 | complete(&cmd->transport_lun_stop_comp); |
c66ac9db NB |
474 | return 1; |
475 | } | |
476 | /* | |
477 | * Determine if frontend context caller is requesting the stopping of | |
e3d6f909 | 478 | * this command for frontend exceptions. |
c66ac9db | 479 | */ |
a1d8b49a | 480 | if (atomic_read(&cmd->t_transport_stop)) { |
6708bb27 | 481 | pr_debug("%s:%d atomic_read(&cmd->t_transport_stop) ==" |
c66ac9db | 482 | " TRUE for ITT: 0x%08x\n", __func__, __LINE__, |
e3d6f909 | 483 | cmd->se_tfo->get_task_tag(cmd)); |
c66ac9db | 484 | |
c66ac9db NB |
485 | if (transport_off == 2) |
486 | transport_all_task_dev_remove_state(cmd); | |
487 | ||
488 | /* | |
489 | * Clear struct se_cmd->se_lun before the transport_off == 2 handoff | |
490 | * to FE. | |
491 | */ | |
492 | if (transport_off == 2) | |
493 | cmd->se_lun = NULL; | |
a1d8b49a | 494 | spin_unlock_irqrestore(&cmd->t_state_lock, flags); |
c66ac9db | 495 | |
a1d8b49a | 496 | complete(&cmd->t_transport_stop_comp); |
c66ac9db NB |
497 | return 1; |
498 | } | |
499 | if (transport_off) { | |
a1d8b49a | 500 | atomic_set(&cmd->t_transport_active, 0); |
c66ac9db NB |
501 | if (transport_off == 2) { |
502 | transport_all_task_dev_remove_state(cmd); | |
503 | /* | |
504 | * Clear struct se_cmd->se_lun before the transport_off == 2 | |
505 | * handoff to fabric module. | |
506 | */ | |
507 | cmd->se_lun = NULL; | |
508 | /* | |
509 | * Some fabric modules like tcm_loop can release | |
25985edc | 510 | * their internally allocated I/O reference now and |
c66ac9db | 511 | * struct se_cmd now. |
88dd9e26 NB |
512 | * |
513 | * Fabric modules are expected to return '1' here if the | |
514 | * se_cmd being passed is released at this point, | |
515 | * or zero if not being released. | |
c66ac9db | 516 | */ |
e3d6f909 | 517 | if (cmd->se_tfo->check_stop_free != NULL) { |
c66ac9db | 518 | spin_unlock_irqrestore( |
a1d8b49a | 519 | &cmd->t_state_lock, flags); |
c66ac9db | 520 | |
88dd9e26 | 521 | return cmd->se_tfo->check_stop_free(cmd); |
c66ac9db NB |
522 | } |
523 | } | |
a1d8b49a | 524 | spin_unlock_irqrestore(&cmd->t_state_lock, flags); |
c66ac9db NB |
525 | |
526 | return 0; | |
527 | } else if (t_state) | |
528 | cmd->t_state = t_state; | |
a1d8b49a | 529 | spin_unlock_irqrestore(&cmd->t_state_lock, flags); |
c66ac9db NB |
530 | |
531 | return 0; | |
532 | } | |
533 | ||
534 | static int transport_cmd_check_stop_to_fabric(struct se_cmd *cmd) | |
535 | { | |
536 | return transport_cmd_check_stop(cmd, 2, 0); | |
537 | } | |
538 | ||
539 | static void transport_lun_remove_cmd(struct se_cmd *cmd) | |
540 | { | |
e3d6f909 | 541 | struct se_lun *lun = cmd->se_lun; |
c66ac9db NB |
542 | unsigned long flags; |
543 | ||
544 | if (!lun) | |
545 | return; | |
546 | ||
a1d8b49a | 547 | spin_lock_irqsave(&cmd->t_state_lock, flags); |
6708bb27 | 548 | if (!atomic_read(&cmd->transport_dev_active)) { |
a1d8b49a | 549 | spin_unlock_irqrestore(&cmd->t_state_lock, flags); |
c66ac9db NB |
550 | goto check_lun; |
551 | } | |
a1d8b49a | 552 | atomic_set(&cmd->transport_dev_active, 0); |
c66ac9db | 553 | transport_all_task_dev_remove_state(cmd); |
a1d8b49a | 554 | spin_unlock_irqrestore(&cmd->t_state_lock, flags); |
c66ac9db | 555 | |
c66ac9db NB |
556 | |
557 | check_lun: | |
558 | spin_lock_irqsave(&lun->lun_cmd_lock, flags); | |
a1d8b49a | 559 | if (atomic_read(&cmd->transport_lun_active)) { |
5951146d | 560 | list_del(&cmd->se_lun_node); |
a1d8b49a | 561 | atomic_set(&cmd->transport_lun_active, 0); |
c66ac9db | 562 | #if 0 |
6708bb27 | 563 | pr_debug("Removed ITT: 0x%08x from LUN LIST[%d]\n" |
e3d6f909 | 564 | cmd->se_tfo->get_task_tag(cmd), lun->unpacked_lun); |
c66ac9db NB |
565 | #endif |
566 | } | |
567 | spin_unlock_irqrestore(&lun->lun_cmd_lock, flags); | |
568 | } | |
569 | ||
570 | void transport_cmd_finish_abort(struct se_cmd *cmd, int remove) | |
571 | { | |
8dc52b54 NB |
572 | if (!cmd->se_tmr_req) |
573 | transport_lun_remove_cmd(cmd); | |
c66ac9db NB |
574 | |
575 | if (transport_cmd_check_stop_to_fabric(cmd)) | |
576 | return; | |
77039d1e | 577 | if (remove) { |
3df8d40b | 578 | transport_remove_cmd_from_queue(cmd); |
e6a2573f | 579 | transport_put_cmd(cmd); |
77039d1e | 580 | } |
c66ac9db NB |
581 | } |
582 | ||
f7a5cc0b CH |
583 | static void transport_add_cmd_to_queue(struct se_cmd *cmd, int t_state, |
584 | bool at_head) | |
c66ac9db NB |
585 | { |
586 | struct se_device *dev = cmd->se_dev; | |
e3d6f909 | 587 | struct se_queue_obj *qobj = &dev->dev_queue_obj; |
c66ac9db NB |
588 | unsigned long flags; |
589 | ||
c66ac9db | 590 | if (t_state) { |
a1d8b49a | 591 | spin_lock_irqsave(&cmd->t_state_lock, flags); |
c66ac9db | 592 | cmd->t_state = t_state; |
a1d8b49a AG |
593 | atomic_set(&cmd->t_transport_active, 1); |
594 | spin_unlock_irqrestore(&cmd->t_state_lock, flags); | |
c66ac9db NB |
595 | } |
596 | ||
597 | spin_lock_irqsave(&qobj->cmd_queue_lock, flags); | |
79a7fef2 RD |
598 | |
599 | /* If the cmd is already on the list, remove it before we add it */ | |
600 | if (!list_empty(&cmd->se_queue_node)) | |
601 | list_del(&cmd->se_queue_node); | |
602 | else | |
603 | atomic_inc(&qobj->queue_cnt); | |
604 | ||
f7a5cc0b | 605 | if (at_head) |
07bde79a | 606 | list_add(&cmd->se_queue_node, &qobj->qobj_list); |
f7a5cc0b | 607 | else |
07bde79a | 608 | list_add_tail(&cmd->se_queue_node, &qobj->qobj_list); |
79a7fef2 | 609 | atomic_set(&cmd->t_transport_queue_active, 1); |
c66ac9db NB |
610 | spin_unlock_irqrestore(&qobj->cmd_queue_lock, flags); |
611 | ||
c66ac9db | 612 | wake_up_interruptible(&qobj->thread_wq); |
c66ac9db NB |
613 | } |
614 | ||
5951146d AG |
615 | static struct se_cmd * |
616 | transport_get_cmd_from_queue(struct se_queue_obj *qobj) | |
c66ac9db | 617 | { |
5951146d | 618 | struct se_cmd *cmd; |
c66ac9db NB |
619 | unsigned long flags; |
620 | ||
621 | spin_lock_irqsave(&qobj->cmd_queue_lock, flags); | |
622 | if (list_empty(&qobj->qobj_list)) { | |
623 | spin_unlock_irqrestore(&qobj->cmd_queue_lock, flags); | |
624 | return NULL; | |
625 | } | |
5951146d | 626 | cmd = list_first_entry(&qobj->qobj_list, struct se_cmd, se_queue_node); |
c66ac9db | 627 | |
79a7fef2 | 628 | atomic_set(&cmd->t_transport_queue_active, 0); |
c66ac9db | 629 | |
79a7fef2 | 630 | list_del_init(&cmd->se_queue_node); |
c66ac9db NB |
631 | atomic_dec(&qobj->queue_cnt); |
632 | spin_unlock_irqrestore(&qobj->cmd_queue_lock, flags); | |
633 | ||
5951146d | 634 | return cmd; |
c66ac9db NB |
635 | } |
636 | ||
3df8d40b | 637 | static void transport_remove_cmd_from_queue(struct se_cmd *cmd) |
c66ac9db | 638 | { |
3df8d40b | 639 | struct se_queue_obj *qobj = &cmd->se_dev->dev_queue_obj; |
c66ac9db NB |
640 | unsigned long flags; |
641 | ||
642 | spin_lock_irqsave(&qobj->cmd_queue_lock, flags); | |
6708bb27 | 643 | if (!atomic_read(&cmd->t_transport_queue_active)) { |
c66ac9db NB |
644 | spin_unlock_irqrestore(&qobj->cmd_queue_lock, flags); |
645 | return; | |
646 | } | |
79a7fef2 RD |
647 | atomic_set(&cmd->t_transport_queue_active, 0); |
648 | atomic_dec(&qobj->queue_cnt); | |
649 | list_del_init(&cmd->se_queue_node); | |
c66ac9db NB |
650 | spin_unlock_irqrestore(&qobj->cmd_queue_lock, flags); |
651 | ||
a1d8b49a | 652 | if (atomic_read(&cmd->t_transport_queue_active)) { |
6708bb27 | 653 | pr_err("ITT: 0x%08x t_transport_queue_active: %d\n", |
e3d6f909 | 654 | cmd->se_tfo->get_task_tag(cmd), |
a1d8b49a | 655 | atomic_read(&cmd->t_transport_queue_active)); |
c66ac9db NB |
656 | } |
657 | } | |
658 | ||
659 | /* | |
660 | * Completion function used by TCM subsystem plugins (such as FILEIO) | |
661 | * for queueing up response from struct se_subsystem_api->do_task() | |
662 | */ | |
663 | void transport_complete_sync_cache(struct se_cmd *cmd, int good) | |
664 | { | |
a1d8b49a | 665 | struct se_task *task = list_entry(cmd->t_task_list.next, |
c66ac9db NB |
666 | struct se_task, t_list); |
667 | ||
668 | if (good) { | |
669 | cmd->scsi_status = SAM_STAT_GOOD; | |
670 | task->task_scsi_status = GOOD; | |
671 | } else { | |
672 | task->task_scsi_status = SAM_STAT_CHECK_CONDITION; | |
03e98c9e NB |
673 | task->task_se_cmd->scsi_sense_reason = |
674 | TCM_LOGICAL_UNIT_COMMUNICATION_FAILURE; | |
675 | ||
c66ac9db NB |
676 | } |
677 | ||
678 | transport_complete_task(task, good); | |
679 | } | |
680 | EXPORT_SYMBOL(transport_complete_sync_cache); | |
681 | ||
35e0e757 CH |
682 | static void target_complete_failure_work(struct work_struct *work) |
683 | { | |
684 | struct se_cmd *cmd = container_of(work, struct se_cmd, work); | |
685 | ||
03e98c9e | 686 | transport_generic_request_failure(cmd); |
35e0e757 CH |
687 | } |
688 | ||
c66ac9db NB |
689 | /* transport_complete_task(): |
690 | * | |
691 | * Called from interrupt and non interrupt context depending | |
692 | * on the transport plugin. | |
693 | */ | |
694 | void transport_complete_task(struct se_task *task, int success) | |
695 | { | |
e3d6f909 | 696 | struct se_cmd *cmd = task->task_se_cmd; |
42bf829e | 697 | struct se_device *dev = cmd->se_dev; |
c66ac9db NB |
698 | unsigned long flags; |
699 | #if 0 | |
6708bb27 | 700 | pr_debug("task: %p CDB: 0x%02x obj_ptr: %p\n", task, |
a1d8b49a | 701 | cmd->t_task_cdb[0], dev); |
c66ac9db | 702 | #endif |
e3d6f909 | 703 | if (dev) |
c66ac9db | 704 | atomic_inc(&dev->depth_left); |
c66ac9db | 705 | |
a1d8b49a | 706 | spin_lock_irqsave(&cmd->t_state_lock, flags); |
6c76bf95 | 707 | task->task_flags &= ~TF_ACTIVE; |
c66ac9db NB |
708 | |
709 | /* | |
710 | * See if any sense data exists, if so set the TASK_SENSE flag. | |
711 | * Also check for any other post completion work that needs to be | |
712 | * done by the plugins. | |
713 | */ | |
714 | if (dev && dev->transport->transport_complete) { | |
715 | if (dev->transport->transport_complete(task) != 0) { | |
716 | cmd->se_cmd_flags |= SCF_TRANSPORT_TASK_SENSE; | |
717 | task->task_sense = 1; | |
718 | success = 1; | |
719 | } | |
720 | } | |
721 | ||
722 | /* | |
723 | * See if we are waiting for outstanding struct se_task | |
724 | * to complete for an exception condition | |
725 | */ | |
6c76bf95 | 726 | if (task->task_flags & TF_REQUEST_STOP) { |
a1d8b49a | 727 | spin_unlock_irqrestore(&cmd->t_state_lock, flags); |
c66ac9db NB |
728 | complete(&task->task_stop_comp); |
729 | return; | |
730 | } | |
2235007c CH |
731 | |
732 | if (!success) | |
733 | cmd->t_tasks_failed = 1; | |
734 | ||
c66ac9db NB |
735 | /* |
736 | * Decrement the outstanding t_task_cdbs_left count. The last | |
737 | * struct se_task from struct se_cmd will complete itself into the | |
738 | * device queue depending upon int success. | |
739 | */ | |
6708bb27 | 740 | if (!atomic_dec_and_test(&cmd->t_task_cdbs_left)) { |
a1d8b49a | 741 | spin_unlock_irqrestore(&cmd->t_state_lock, flags); |
c66ac9db NB |
742 | return; |
743 | } | |
744 | ||
2235007c | 745 | if (cmd->t_tasks_failed) { |
c66ac9db NB |
746 | if (!task->task_error_status) { |
747 | task->task_error_status = | |
03e98c9e NB |
748 | TCM_LOGICAL_UNIT_COMMUNICATION_FAILURE; |
749 | cmd->scsi_sense_reason = | |
750 | TCM_LOGICAL_UNIT_COMMUNICATION_FAILURE; | |
c66ac9db | 751 | } |
03e98c9e | 752 | |
35e0e757 | 753 | INIT_WORK(&cmd->work, target_complete_failure_work); |
c66ac9db | 754 | } else { |
a1d8b49a | 755 | atomic_set(&cmd->t_transport_complete, 1); |
35e0e757 | 756 | INIT_WORK(&cmd->work, target_complete_ok_work); |
c66ac9db | 757 | } |
35e0e757 | 758 | |
35e0e757 CH |
759 | cmd->t_state = TRANSPORT_COMPLETE; |
760 | atomic_set(&cmd->t_transport_active, 1); | |
a1d8b49a | 761 | spin_unlock_irqrestore(&cmd->t_state_lock, flags); |
c66ac9db | 762 | |
35e0e757 | 763 | queue_work(target_completion_wq, &cmd->work); |
c66ac9db NB |
764 | } |
765 | EXPORT_SYMBOL(transport_complete_task); | |
766 | ||
767 | /* | |
768 | * Called by transport_add_tasks_from_cmd() once a struct se_cmd's | |
769 | * struct se_task list are ready to be added to the active execution list | |
770 | * struct se_device | |
771 | ||
772 | * Called with se_dev_t->execute_task_lock called. | |
773 | */ | |
774 | static inline int transport_add_task_check_sam_attr( | |
775 | struct se_task *task, | |
776 | struct se_task *task_prev, | |
777 | struct se_device *dev) | |
778 | { | |
779 | /* | |
780 | * No SAM Task attribute emulation enabled, add to tail of | |
781 | * execution queue | |
782 | */ | |
783 | if (dev->dev_task_attr_type != SAM_TASK_ATTR_EMULATED) { | |
784 | list_add_tail(&task->t_execute_list, &dev->execute_task_list); | |
785 | return 0; | |
786 | } | |
787 | /* | |
788 | * HEAD_OF_QUEUE attribute for received CDB, which means | |
789 | * the first task that is associated with a struct se_cmd goes to | |
790 | * head of the struct se_device->execute_task_list, and task_prev | |
791 | * after that for each subsequent task | |
792 | */ | |
e66ecd50 | 793 | if (task->task_se_cmd->sam_task_attr == MSG_HEAD_TAG) { |
c66ac9db NB |
794 | list_add(&task->t_execute_list, |
795 | (task_prev != NULL) ? | |
796 | &task_prev->t_execute_list : | |
797 | &dev->execute_task_list); | |
798 | ||
6708bb27 | 799 | pr_debug("Set HEAD_OF_QUEUE for task CDB: 0x%02x" |
c66ac9db | 800 | " in execution queue\n", |
6708bb27 | 801 | task->task_se_cmd->t_task_cdb[0]); |
c66ac9db NB |
802 | return 1; |
803 | } | |
804 | /* | |
805 | * For ORDERED, SIMPLE or UNTAGGED attribute tasks once they have been | |
806 | * transitioned from Dermant -> Active state, and are added to the end | |
807 | * of the struct se_device->execute_task_list | |
808 | */ | |
809 | list_add_tail(&task->t_execute_list, &dev->execute_task_list); | |
810 | return 0; | |
811 | } | |
812 | ||
813 | /* __transport_add_task_to_execute_queue(): | |
814 | * | |
815 | * Called with se_dev_t->execute_task_lock called. | |
816 | */ | |
817 | static void __transport_add_task_to_execute_queue( | |
818 | struct se_task *task, | |
819 | struct se_task *task_prev, | |
820 | struct se_device *dev) | |
821 | { | |
822 | int head_of_queue; | |
823 | ||
824 | head_of_queue = transport_add_task_check_sam_attr(task, task_prev, dev); | |
825 | atomic_inc(&dev->execute_tasks); | |
826 | ||
827 | if (atomic_read(&task->task_state_active)) | |
828 | return; | |
829 | /* | |
830 | * Determine if this task needs to go to HEAD_OF_QUEUE for the | |
831 | * state list as well. Running with SAM Task Attribute emulation | |
832 | * will always return head_of_queue == 0 here | |
833 | */ | |
834 | if (head_of_queue) | |
835 | list_add(&task->t_state_list, (task_prev) ? | |
836 | &task_prev->t_state_list : | |
837 | &dev->state_task_list); | |
838 | else | |
839 | list_add_tail(&task->t_state_list, &dev->state_task_list); | |
840 | ||
841 | atomic_set(&task->task_state_active, 1); | |
842 | ||
6708bb27 | 843 | pr_debug("Added ITT: 0x%08x task[%p] to dev: %p\n", |
e3d6f909 | 844 | task->task_se_cmd->se_tfo->get_task_tag(task->task_se_cmd), |
c66ac9db NB |
845 | task, dev); |
846 | } | |
847 | ||
848 | static void transport_add_tasks_to_state_queue(struct se_cmd *cmd) | |
849 | { | |
42bf829e | 850 | struct se_device *dev = cmd->se_dev; |
c66ac9db NB |
851 | struct se_task *task; |
852 | unsigned long flags; | |
853 | ||
a1d8b49a AG |
854 | spin_lock_irqsave(&cmd->t_state_lock, flags); |
855 | list_for_each_entry(task, &cmd->t_task_list, t_list) { | |
c66ac9db NB |
856 | if (atomic_read(&task->task_state_active)) |
857 | continue; | |
858 | ||
859 | spin_lock(&dev->execute_task_lock); | |
860 | list_add_tail(&task->t_state_list, &dev->state_task_list); | |
861 | atomic_set(&task->task_state_active, 1); | |
862 | ||
6708bb27 AG |
863 | pr_debug("Added ITT: 0x%08x task[%p] to dev: %p\n", |
864 | task->task_se_cmd->se_tfo->get_task_tag( | |
c66ac9db NB |
865 | task->task_se_cmd), task, dev); |
866 | ||
867 | spin_unlock(&dev->execute_task_lock); | |
868 | } | |
a1d8b49a | 869 | spin_unlock_irqrestore(&cmd->t_state_lock, flags); |
c66ac9db NB |
870 | } |
871 | ||
872 | static void transport_add_tasks_from_cmd(struct se_cmd *cmd) | |
873 | { | |
5951146d | 874 | struct se_device *dev = cmd->se_dev; |
c66ac9db NB |
875 | struct se_task *task, *task_prev = NULL; |
876 | unsigned long flags; | |
877 | ||
878 | spin_lock_irqsave(&dev->execute_task_lock, flags); | |
a1d8b49a | 879 | list_for_each_entry(task, &cmd->t_task_list, t_list) { |
04629b7b | 880 | if (!list_empty(&task->t_execute_list)) |
c66ac9db NB |
881 | continue; |
882 | /* | |
883 | * __transport_add_task_to_execute_queue() handles the | |
884 | * SAM Task Attribute emulation if enabled | |
885 | */ | |
886 | __transport_add_task_to_execute_queue(task, task_prev, dev); | |
c66ac9db NB |
887 | task_prev = task; |
888 | } | |
889 | spin_unlock_irqrestore(&dev->execute_task_lock, flags); | |
c66ac9db NB |
890 | } |
891 | ||
04629b7b CH |
892 | void __transport_remove_task_from_execute_queue(struct se_task *task, |
893 | struct se_device *dev) | |
894 | { | |
895 | list_del_init(&task->t_execute_list); | |
896 | atomic_dec(&dev->execute_tasks); | |
897 | } | |
898 | ||
52208ae3 | 899 | void transport_remove_task_from_execute_queue( |
c66ac9db NB |
900 | struct se_task *task, |
901 | struct se_device *dev) | |
902 | { | |
903 | unsigned long flags; | |
904 | ||
04629b7b | 905 | if (WARN_ON(list_empty(&task->t_execute_list))) |
af57c3ac | 906 | return; |
af57c3ac | 907 | |
c66ac9db | 908 | spin_lock_irqsave(&dev->execute_task_lock, flags); |
04629b7b | 909 | __transport_remove_task_from_execute_queue(task, dev); |
c66ac9db NB |
910 | spin_unlock_irqrestore(&dev->execute_task_lock, flags); |
911 | } | |
912 | ||
07bde79a | 913 | /* |
f147abb4 | 914 | * Handle QUEUE_FULL / -EAGAIN and -ENOMEM status |
07bde79a NB |
915 | */ |
916 | ||
917 | static void target_qf_do_work(struct work_struct *work) | |
918 | { | |
919 | struct se_device *dev = container_of(work, struct se_device, | |
920 | qf_work_queue); | |
bcac364a | 921 | LIST_HEAD(qf_cmd_list); |
07bde79a NB |
922 | struct se_cmd *cmd, *cmd_tmp; |
923 | ||
924 | spin_lock_irq(&dev->qf_cmd_lock); | |
bcac364a RD |
925 | list_splice_init(&dev->qf_cmd_list, &qf_cmd_list); |
926 | spin_unlock_irq(&dev->qf_cmd_lock); | |
07bde79a | 927 | |
bcac364a | 928 | list_for_each_entry_safe(cmd, cmd_tmp, &qf_cmd_list, se_qf_node) { |
07bde79a NB |
929 | list_del(&cmd->se_qf_node); |
930 | atomic_dec(&dev->dev_qf_count); | |
931 | smp_mb__after_atomic_dec(); | |
07bde79a | 932 | |
6708bb27 | 933 | pr_debug("Processing %s cmd: %p QUEUE_FULL in work queue" |
07bde79a | 934 | " context: %s\n", cmd->se_tfo->get_fabric_name(), cmd, |
e057f533 | 935 | (cmd->t_state == TRANSPORT_COMPLETE_QF_OK) ? "COMPLETE_OK" : |
07bde79a NB |
936 | (cmd->t_state == TRANSPORT_COMPLETE_QF_WP) ? "WRITE_PENDING" |
937 | : "UNKNOWN"); | |
f7a5cc0b CH |
938 | |
939 | transport_add_cmd_to_queue(cmd, cmd->t_state, true); | |
07bde79a | 940 | } |
07bde79a NB |
941 | } |
942 | ||
c66ac9db NB |
943 | unsigned char *transport_dump_cmd_direction(struct se_cmd *cmd) |
944 | { | |
945 | switch (cmd->data_direction) { | |
946 | case DMA_NONE: | |
947 | return "NONE"; | |
948 | case DMA_FROM_DEVICE: | |
949 | return "READ"; | |
950 | case DMA_TO_DEVICE: | |
951 | return "WRITE"; | |
952 | case DMA_BIDIRECTIONAL: | |
953 | return "BIDI"; | |
954 | default: | |
955 | break; | |
956 | } | |
957 | ||
958 | return "UNKNOWN"; | |
959 | } | |
960 | ||
961 | void transport_dump_dev_state( | |
962 | struct se_device *dev, | |
963 | char *b, | |
964 | int *bl) | |
965 | { | |
966 | *bl += sprintf(b + *bl, "Status: "); | |
967 | switch (dev->dev_status) { | |
968 | case TRANSPORT_DEVICE_ACTIVATED: | |
969 | *bl += sprintf(b + *bl, "ACTIVATED"); | |
970 | break; | |
971 | case TRANSPORT_DEVICE_DEACTIVATED: | |
972 | *bl += sprintf(b + *bl, "DEACTIVATED"); | |
973 | break; | |
974 | case TRANSPORT_DEVICE_SHUTDOWN: | |
975 | *bl += sprintf(b + *bl, "SHUTDOWN"); | |
976 | break; | |
977 | case TRANSPORT_DEVICE_OFFLINE_ACTIVATED: | |
978 | case TRANSPORT_DEVICE_OFFLINE_DEACTIVATED: | |
979 | *bl += sprintf(b + *bl, "OFFLINE"); | |
980 | break; | |
981 | default: | |
982 | *bl += sprintf(b + *bl, "UNKNOWN=%d", dev->dev_status); | |
983 | break; | |
984 | } | |
985 | ||
986 | *bl += sprintf(b + *bl, " Execute/Left/Max Queue Depth: %d/%d/%d", | |
987 | atomic_read(&dev->execute_tasks), atomic_read(&dev->depth_left), | |
988 | dev->queue_depth); | |
989 | *bl += sprintf(b + *bl, " SectorSize: %u MaxSectors: %u\n", | |
e3d6f909 | 990 | dev->se_sub_dev->se_dev_attrib.block_size, dev->se_sub_dev->se_dev_attrib.max_sectors); |
c66ac9db NB |
991 | *bl += sprintf(b + *bl, " "); |
992 | } | |
993 | ||
c66ac9db NB |
994 | void transport_dump_vpd_proto_id( |
995 | struct t10_vpd *vpd, | |
996 | unsigned char *p_buf, | |
997 | int p_buf_len) | |
998 | { | |
999 | unsigned char buf[VPD_TMP_BUF_SIZE]; | |
1000 | int len; | |
1001 | ||
1002 | memset(buf, 0, VPD_TMP_BUF_SIZE); | |
1003 | len = sprintf(buf, "T10 VPD Protocol Identifier: "); | |
1004 | ||
1005 | switch (vpd->protocol_identifier) { | |
1006 | case 0x00: | |
1007 | sprintf(buf+len, "Fibre Channel\n"); | |
1008 | break; | |
1009 | case 0x10: | |
1010 | sprintf(buf+len, "Parallel SCSI\n"); | |
1011 | break; | |
1012 | case 0x20: | |
1013 | sprintf(buf+len, "SSA\n"); | |
1014 | break; | |
1015 | case 0x30: | |
1016 | sprintf(buf+len, "IEEE 1394\n"); | |
1017 | break; | |
1018 | case 0x40: | |
1019 | sprintf(buf+len, "SCSI Remote Direct Memory Access" | |
1020 | " Protocol\n"); | |
1021 | break; | |
1022 | case 0x50: | |
1023 | sprintf(buf+len, "Internet SCSI (iSCSI)\n"); | |
1024 | break; | |
1025 | case 0x60: | |
1026 | sprintf(buf+len, "SAS Serial SCSI Protocol\n"); | |
1027 | break; | |
1028 | case 0x70: | |
1029 | sprintf(buf+len, "Automation/Drive Interface Transport" | |
1030 | " Protocol\n"); | |
1031 | break; | |
1032 | case 0x80: | |
1033 | sprintf(buf+len, "AT Attachment Interface ATA/ATAPI\n"); | |
1034 | break; | |
1035 | default: | |
1036 | sprintf(buf+len, "Unknown 0x%02x\n", | |
1037 | vpd->protocol_identifier); | |
1038 | break; | |
1039 | } | |
1040 | ||
1041 | if (p_buf) | |
1042 | strncpy(p_buf, buf, p_buf_len); | |
1043 | else | |
6708bb27 | 1044 | pr_debug("%s", buf); |
c66ac9db NB |
1045 | } |
1046 | ||
1047 | void | |
1048 | transport_set_vpd_proto_id(struct t10_vpd *vpd, unsigned char *page_83) | |
1049 | { | |
1050 | /* | |
1051 | * Check if the Protocol Identifier Valid (PIV) bit is set.. | |
1052 | * | |
1053 | * from spc3r23.pdf section 7.5.1 | |
1054 | */ | |
1055 | if (page_83[1] & 0x80) { | |
1056 | vpd->protocol_identifier = (page_83[0] & 0xf0); | |
1057 | vpd->protocol_identifier_set = 1; | |
1058 | transport_dump_vpd_proto_id(vpd, NULL, 0); | |
1059 | } | |
1060 | } | |
1061 | EXPORT_SYMBOL(transport_set_vpd_proto_id); | |
1062 | ||
1063 | int transport_dump_vpd_assoc( | |
1064 | struct t10_vpd *vpd, | |
1065 | unsigned char *p_buf, | |
1066 | int p_buf_len) | |
1067 | { | |
1068 | unsigned char buf[VPD_TMP_BUF_SIZE]; | |
e3d6f909 AG |
1069 | int ret = 0; |
1070 | int len; | |
c66ac9db NB |
1071 | |
1072 | memset(buf, 0, VPD_TMP_BUF_SIZE); | |
1073 | len = sprintf(buf, "T10 VPD Identifier Association: "); | |
1074 | ||
1075 | switch (vpd->association) { | |
1076 | case 0x00: | |
1077 | sprintf(buf+len, "addressed logical unit\n"); | |
1078 | break; | |
1079 | case 0x10: | |
1080 | sprintf(buf+len, "target port\n"); | |
1081 | break; | |
1082 | case 0x20: | |
1083 | sprintf(buf+len, "SCSI target device\n"); | |
1084 | break; | |
1085 | default: | |
1086 | sprintf(buf+len, "Unknown 0x%02x\n", vpd->association); | |
e3d6f909 | 1087 | ret = -EINVAL; |
c66ac9db NB |
1088 | break; |
1089 | } | |
1090 | ||
1091 | if (p_buf) | |
1092 | strncpy(p_buf, buf, p_buf_len); | |
1093 | else | |
6708bb27 | 1094 | pr_debug("%s", buf); |
c66ac9db NB |
1095 | |
1096 | return ret; | |
1097 | } | |
1098 | ||
1099 | int transport_set_vpd_assoc(struct t10_vpd *vpd, unsigned char *page_83) | |
1100 | { | |
1101 | /* | |
1102 | * The VPD identification association.. | |
1103 | * | |
1104 | * from spc3r23.pdf Section 7.6.3.1 Table 297 | |
1105 | */ | |
1106 | vpd->association = (page_83[1] & 0x30); | |
1107 | return transport_dump_vpd_assoc(vpd, NULL, 0); | |
1108 | } | |
1109 | EXPORT_SYMBOL(transport_set_vpd_assoc); | |
1110 | ||
1111 | int transport_dump_vpd_ident_type( | |
1112 | struct t10_vpd *vpd, | |
1113 | unsigned char *p_buf, | |
1114 | int p_buf_len) | |
1115 | { | |
1116 | unsigned char buf[VPD_TMP_BUF_SIZE]; | |
e3d6f909 AG |
1117 | int ret = 0; |
1118 | int len; | |
c66ac9db NB |
1119 | |
1120 | memset(buf, 0, VPD_TMP_BUF_SIZE); | |
1121 | len = sprintf(buf, "T10 VPD Identifier Type: "); | |
1122 | ||
1123 | switch (vpd->device_identifier_type) { | |
1124 | case 0x00: | |
1125 | sprintf(buf+len, "Vendor specific\n"); | |
1126 | break; | |
1127 | case 0x01: | |
1128 | sprintf(buf+len, "T10 Vendor ID based\n"); | |
1129 | break; | |
1130 | case 0x02: | |
1131 | sprintf(buf+len, "EUI-64 based\n"); | |
1132 | break; | |
1133 | case 0x03: | |
1134 | sprintf(buf+len, "NAA\n"); | |
1135 | break; | |
1136 | case 0x04: | |
1137 | sprintf(buf+len, "Relative target port identifier\n"); | |
1138 | break; | |
1139 | case 0x08: | |
1140 | sprintf(buf+len, "SCSI name string\n"); | |
1141 | break; | |
1142 | default: | |
1143 | sprintf(buf+len, "Unsupported: 0x%02x\n", | |
1144 | vpd->device_identifier_type); | |
e3d6f909 | 1145 | ret = -EINVAL; |
c66ac9db NB |
1146 | break; |
1147 | } | |
1148 | ||
e3d6f909 AG |
1149 | if (p_buf) { |
1150 | if (p_buf_len < strlen(buf)+1) | |
1151 | return -EINVAL; | |
c66ac9db | 1152 | strncpy(p_buf, buf, p_buf_len); |
e3d6f909 | 1153 | } else { |
6708bb27 | 1154 | pr_debug("%s", buf); |
e3d6f909 | 1155 | } |
c66ac9db NB |
1156 | |
1157 | return ret; | |
1158 | } | |
1159 | ||
1160 | int transport_set_vpd_ident_type(struct t10_vpd *vpd, unsigned char *page_83) | |
1161 | { | |
1162 | /* | |
1163 | * The VPD identifier type.. | |
1164 | * | |
1165 | * from spc3r23.pdf Section 7.6.3.1 Table 298 | |
1166 | */ | |
1167 | vpd->device_identifier_type = (page_83[1] & 0x0f); | |
1168 | return transport_dump_vpd_ident_type(vpd, NULL, 0); | |
1169 | } | |
1170 | EXPORT_SYMBOL(transport_set_vpd_ident_type); | |
1171 | ||
1172 | int transport_dump_vpd_ident( | |
1173 | struct t10_vpd *vpd, | |
1174 | unsigned char *p_buf, | |
1175 | int p_buf_len) | |
1176 | { | |
1177 | unsigned char buf[VPD_TMP_BUF_SIZE]; | |
1178 | int ret = 0; | |
1179 | ||
1180 | memset(buf, 0, VPD_TMP_BUF_SIZE); | |
1181 | ||
1182 | switch (vpd->device_identifier_code_set) { | |
1183 | case 0x01: /* Binary */ | |
1184 | sprintf(buf, "T10 VPD Binary Device Identifier: %s\n", | |
1185 | &vpd->device_identifier[0]); | |
1186 | break; | |
1187 | case 0x02: /* ASCII */ | |
1188 | sprintf(buf, "T10 VPD ASCII Device Identifier: %s\n", | |
1189 | &vpd->device_identifier[0]); | |
1190 | break; | |
1191 | case 0x03: /* UTF-8 */ | |
1192 | sprintf(buf, "T10 VPD UTF-8 Device Identifier: %s\n", | |
1193 | &vpd->device_identifier[0]); | |
1194 | break; | |
1195 | default: | |
1196 | sprintf(buf, "T10 VPD Device Identifier encoding unsupported:" | |
1197 | " 0x%02x", vpd->device_identifier_code_set); | |
e3d6f909 | 1198 | ret = -EINVAL; |
c66ac9db NB |
1199 | break; |
1200 | } | |
1201 | ||
1202 | if (p_buf) | |
1203 | strncpy(p_buf, buf, p_buf_len); | |
1204 | else | |
6708bb27 | 1205 | pr_debug("%s", buf); |
c66ac9db NB |
1206 | |
1207 | return ret; | |
1208 | } | |
1209 | ||
1210 | int | |
1211 | transport_set_vpd_ident(struct t10_vpd *vpd, unsigned char *page_83) | |
1212 | { | |
1213 | static const char hex_str[] = "0123456789abcdef"; | |
1214 | int j = 0, i = 4; /* offset to start of the identifer */ | |
1215 | ||
1216 | /* | |
1217 | * The VPD Code Set (encoding) | |
1218 | * | |
1219 | * from spc3r23.pdf Section 7.6.3.1 Table 296 | |
1220 | */ | |
1221 | vpd->device_identifier_code_set = (page_83[0] & 0x0f); | |
1222 | switch (vpd->device_identifier_code_set) { | |
1223 | case 0x01: /* Binary */ | |
1224 | vpd->device_identifier[j++] = | |
1225 | hex_str[vpd->device_identifier_type]; | |
1226 | while (i < (4 + page_83[3])) { | |
1227 | vpd->device_identifier[j++] = | |
1228 | hex_str[(page_83[i] & 0xf0) >> 4]; | |
1229 | vpd->device_identifier[j++] = | |
1230 | hex_str[page_83[i] & 0x0f]; | |
1231 | i++; | |
1232 | } | |
1233 | break; | |
1234 | case 0x02: /* ASCII */ | |
1235 | case 0x03: /* UTF-8 */ | |
1236 | while (i < (4 + page_83[3])) | |
1237 | vpd->device_identifier[j++] = page_83[i++]; | |
1238 | break; | |
1239 | default: | |
1240 | break; | |
1241 | } | |
1242 | ||
1243 | return transport_dump_vpd_ident(vpd, NULL, 0); | |
1244 | } | |
1245 | EXPORT_SYMBOL(transport_set_vpd_ident); | |
1246 | ||
1247 | static void core_setup_task_attr_emulation(struct se_device *dev) | |
1248 | { | |
1249 | /* | |
1250 | * If this device is from Target_Core_Mod/pSCSI, disable the | |
1251 | * SAM Task Attribute emulation. | |
1252 | * | |
1253 | * This is currently not available in upsream Linux/SCSI Target | |
1254 | * mode code, and is assumed to be disabled while using TCM/pSCSI. | |
1255 | */ | |
e3d6f909 | 1256 | if (dev->transport->transport_type == TRANSPORT_PLUGIN_PHBA_PDEV) { |
c66ac9db NB |
1257 | dev->dev_task_attr_type = SAM_TASK_ATTR_PASSTHROUGH; |
1258 | return; | |
1259 | } | |
1260 | ||
1261 | dev->dev_task_attr_type = SAM_TASK_ATTR_EMULATED; | |
6708bb27 | 1262 | pr_debug("%s: Using SAM_TASK_ATTR_EMULATED for SPC: 0x%02x" |
e3d6f909 AG |
1263 | " device\n", dev->transport->name, |
1264 | dev->transport->get_device_rev(dev)); | |
c66ac9db NB |
1265 | } |
1266 | ||
1267 | static void scsi_dump_inquiry(struct se_device *dev) | |
1268 | { | |
e3d6f909 | 1269 | struct t10_wwn *wwn = &dev->se_sub_dev->t10_wwn; |
c66ac9db NB |
1270 | int i, device_type; |
1271 | /* | |
1272 | * Print Linux/SCSI style INQUIRY formatting to the kernel ring buffer | |
1273 | */ | |
6708bb27 | 1274 | pr_debug(" Vendor: "); |
c66ac9db NB |
1275 | for (i = 0; i < 8; i++) |
1276 | if (wwn->vendor[i] >= 0x20) | |
6708bb27 | 1277 | pr_debug("%c", wwn->vendor[i]); |
c66ac9db | 1278 | else |
6708bb27 | 1279 | pr_debug(" "); |
c66ac9db | 1280 | |
6708bb27 | 1281 | pr_debug(" Model: "); |
c66ac9db NB |
1282 | for (i = 0; i < 16; i++) |
1283 | if (wwn->model[i] >= 0x20) | |
6708bb27 | 1284 | pr_debug("%c", wwn->model[i]); |
c66ac9db | 1285 | else |
6708bb27 | 1286 | pr_debug(" "); |
c66ac9db | 1287 | |
6708bb27 | 1288 | pr_debug(" Revision: "); |
c66ac9db NB |
1289 | for (i = 0; i < 4; i++) |
1290 | if (wwn->revision[i] >= 0x20) | |
6708bb27 | 1291 | pr_debug("%c", wwn->revision[i]); |
c66ac9db | 1292 | else |
6708bb27 | 1293 | pr_debug(" "); |
c66ac9db | 1294 | |
6708bb27 | 1295 | pr_debug("\n"); |
c66ac9db | 1296 | |
e3d6f909 | 1297 | device_type = dev->transport->get_device_type(dev); |
6708bb27 AG |
1298 | pr_debug(" Type: %s ", scsi_device_type(device_type)); |
1299 | pr_debug(" ANSI SCSI revision: %02x\n", | |
e3d6f909 | 1300 | dev->transport->get_device_rev(dev)); |
c66ac9db NB |
1301 | } |
1302 | ||
1303 | struct se_device *transport_add_device_to_core_hba( | |
1304 | struct se_hba *hba, | |
1305 | struct se_subsystem_api *transport, | |
1306 | struct se_subsystem_dev *se_dev, | |
1307 | u32 device_flags, | |
1308 | void *transport_dev, | |
1309 | struct se_dev_limits *dev_limits, | |
1310 | const char *inquiry_prod, | |
1311 | const char *inquiry_rev) | |
1312 | { | |
12a18bdc | 1313 | int force_pt; |
c66ac9db NB |
1314 | struct se_device *dev; |
1315 | ||
1316 | dev = kzalloc(sizeof(struct se_device), GFP_KERNEL); | |
6708bb27 AG |
1317 | if (!dev) { |
1318 | pr_err("Unable to allocate memory for se_dev_t\n"); | |
c66ac9db NB |
1319 | return NULL; |
1320 | } | |
c66ac9db | 1321 | |
e3d6f909 | 1322 | transport_init_queue_obj(&dev->dev_queue_obj); |
c66ac9db NB |
1323 | dev->dev_flags = device_flags; |
1324 | dev->dev_status |= TRANSPORT_DEVICE_DEACTIVATED; | |
5951146d | 1325 | dev->dev_ptr = transport_dev; |
c66ac9db NB |
1326 | dev->se_hba = hba; |
1327 | dev->se_sub_dev = se_dev; | |
1328 | dev->transport = transport; | |
c66ac9db NB |
1329 | INIT_LIST_HEAD(&dev->dev_list); |
1330 | INIT_LIST_HEAD(&dev->dev_sep_list); | |
1331 | INIT_LIST_HEAD(&dev->dev_tmr_list); | |
1332 | INIT_LIST_HEAD(&dev->execute_task_list); | |
1333 | INIT_LIST_HEAD(&dev->delayed_cmd_list); | |
c66ac9db | 1334 | INIT_LIST_HEAD(&dev->state_task_list); |
07bde79a | 1335 | INIT_LIST_HEAD(&dev->qf_cmd_list); |
c66ac9db NB |
1336 | spin_lock_init(&dev->execute_task_lock); |
1337 | spin_lock_init(&dev->delayed_cmd_lock); | |
c66ac9db NB |
1338 | spin_lock_init(&dev->dev_reservation_lock); |
1339 | spin_lock_init(&dev->dev_status_lock); | |
c66ac9db NB |
1340 | spin_lock_init(&dev->se_port_lock); |
1341 | spin_lock_init(&dev->se_tmr_lock); | |
07bde79a | 1342 | spin_lock_init(&dev->qf_cmd_lock); |
c66ac9db NB |
1343 | |
1344 | dev->queue_depth = dev_limits->queue_depth; | |
1345 | atomic_set(&dev->depth_left, dev->queue_depth); | |
1346 | atomic_set(&dev->dev_ordered_id, 0); | |
1347 | ||
1348 | se_dev_set_default_attribs(dev, dev_limits); | |
1349 | ||
1350 | dev->dev_index = scsi_get_new_index(SCSI_DEVICE_INDEX); | |
1351 | dev->creation_time = get_jiffies_64(); | |
1352 | spin_lock_init(&dev->stats_lock); | |
1353 | ||
1354 | spin_lock(&hba->device_lock); | |
1355 | list_add_tail(&dev->dev_list, &hba->hba_dev_list); | |
1356 | hba->dev_count++; | |
1357 | spin_unlock(&hba->device_lock); | |
1358 | /* | |
1359 | * Setup the SAM Task Attribute emulation for struct se_device | |
1360 | */ | |
1361 | core_setup_task_attr_emulation(dev); | |
1362 | /* | |
1363 | * Force PR and ALUA passthrough emulation with internal object use. | |
1364 | */ | |
1365 | force_pt = (hba->hba_flags & HBA_FLAGS_INTERNAL_USE); | |
1366 | /* | |
1367 | * Setup the Reservations infrastructure for struct se_device | |
1368 | */ | |
1369 | core_setup_reservations(dev, force_pt); | |
1370 | /* | |
1371 | * Setup the Asymmetric Logical Unit Assignment for struct se_device | |
1372 | */ | |
1373 | if (core_setup_alua(dev, force_pt) < 0) | |
1374 | goto out; | |
1375 | ||
1376 | /* | |
1377 | * Startup the struct se_device processing thread | |
1378 | */ | |
1379 | dev->process_thread = kthread_run(transport_processing_thread, dev, | |
e3d6f909 | 1380 | "LIO_%s", dev->transport->name); |
c66ac9db | 1381 | if (IS_ERR(dev->process_thread)) { |
6708bb27 | 1382 | pr_err("Unable to create kthread: LIO_%s\n", |
e3d6f909 | 1383 | dev->transport->name); |
c66ac9db NB |
1384 | goto out; |
1385 | } | |
07bde79a NB |
1386 | /* |
1387 | * Setup work_queue for QUEUE_FULL | |
1388 | */ | |
1389 | INIT_WORK(&dev->qf_work_queue, target_qf_do_work); | |
c66ac9db NB |
1390 | /* |
1391 | * Preload the initial INQUIRY const values if we are doing | |
1392 | * anything virtual (IBLOCK, FILEIO, RAMDISK), but not for TCM/pSCSI | |
1393 | * passthrough because this is being provided by the backend LLD. | |
1394 | * This is required so that transport_get_inquiry() copies these | |
1395 | * originals once back into DEV_T10_WWN(dev) for the virtual device | |
1396 | * setup. | |
1397 | */ | |
e3d6f909 | 1398 | if (dev->transport->transport_type != TRANSPORT_PLUGIN_PHBA_PDEV) { |
f22c1196 | 1399 | if (!inquiry_prod || !inquiry_rev) { |
6708bb27 | 1400 | pr_err("All non TCM/pSCSI plugins require" |
c66ac9db NB |
1401 | " INQUIRY consts\n"); |
1402 | goto out; | |
1403 | } | |
1404 | ||
e3d6f909 AG |
1405 | strncpy(&dev->se_sub_dev->t10_wwn.vendor[0], "LIO-ORG", 8); |
1406 | strncpy(&dev->se_sub_dev->t10_wwn.model[0], inquiry_prod, 16); | |
1407 | strncpy(&dev->se_sub_dev->t10_wwn.revision[0], inquiry_rev, 4); | |
c66ac9db NB |
1408 | } |
1409 | scsi_dump_inquiry(dev); | |
1410 | ||
12a18bdc | 1411 | return dev; |
c66ac9db | 1412 | out: |
c66ac9db NB |
1413 | kthread_stop(dev->process_thread); |
1414 | ||
1415 | spin_lock(&hba->device_lock); | |
1416 | list_del(&dev->dev_list); | |
1417 | hba->dev_count--; | |
1418 | spin_unlock(&hba->device_lock); | |
1419 | ||
1420 | se_release_vpd_for_dev(dev); | |
1421 | ||
c66ac9db NB |
1422 | kfree(dev); |
1423 | ||
1424 | return NULL; | |
1425 | } | |
1426 | EXPORT_SYMBOL(transport_add_device_to_core_hba); | |
1427 | ||
1428 | /* transport_generic_prepare_cdb(): | |
1429 | * | |
1430 | * Since the Initiator sees iSCSI devices as LUNs, the SCSI CDB will | |
1431 | * contain the iSCSI LUN in bits 7-5 of byte 1 as per SAM-2. | |
1432 | * The point of this is since we are mapping iSCSI LUNs to | |
1433 | * SCSI Target IDs having a non-zero LUN in the CDB will throw the | |
1434 | * devices and HBAs for a loop. | |
1435 | */ | |
1436 | static inline void transport_generic_prepare_cdb( | |
1437 | unsigned char *cdb) | |
1438 | { | |
1439 | switch (cdb[0]) { | |
1440 | case READ_10: /* SBC - RDProtect */ | |
1441 | case READ_12: /* SBC - RDProtect */ | |
1442 | case READ_16: /* SBC - RDProtect */ | |
1443 | case SEND_DIAGNOSTIC: /* SPC - SELF-TEST Code */ | |
1444 | case VERIFY: /* SBC - VRProtect */ | |
1445 | case VERIFY_16: /* SBC - VRProtect */ | |
1446 | case WRITE_VERIFY: /* SBC - VRProtect */ | |
1447 | case WRITE_VERIFY_12: /* SBC - VRProtect */ | |
1448 | break; | |
1449 | default: | |
1450 | cdb[1] &= 0x1f; /* clear logical unit number */ | |
1451 | break; | |
1452 | } | |
1453 | } | |
1454 | ||
1455 | static struct se_task * | |
1456 | transport_generic_get_task(struct se_cmd *cmd, | |
1457 | enum dma_data_direction data_direction) | |
1458 | { | |
1459 | struct se_task *task; | |
5951146d | 1460 | struct se_device *dev = cmd->se_dev; |
c66ac9db | 1461 | |
6708bb27 | 1462 | task = dev->transport->alloc_task(cmd->t_task_cdb); |
c66ac9db | 1463 | if (!task) { |
6708bb27 | 1464 | pr_err("Unable to allocate struct se_task\n"); |
c66ac9db NB |
1465 | return NULL; |
1466 | } | |
1467 | ||
1468 | INIT_LIST_HEAD(&task->t_list); | |
1469 | INIT_LIST_HEAD(&task->t_execute_list); | |
1470 | INIT_LIST_HEAD(&task->t_state_list); | |
1471 | init_completion(&task->task_stop_comp); | |
c66ac9db | 1472 | task->task_se_cmd = cmd; |
c66ac9db NB |
1473 | task->task_data_direction = data_direction; |
1474 | ||
c66ac9db NB |
1475 | return task; |
1476 | } | |
1477 | ||
1478 | static int transport_generic_cmd_sequencer(struct se_cmd *, unsigned char *); | |
1479 | ||
c66ac9db NB |
1480 | /* |
1481 | * Used by fabric modules containing a local struct se_cmd within their | |
1482 | * fabric dependent per I/O descriptor. | |
1483 | */ | |
1484 | void transport_init_se_cmd( | |
1485 | struct se_cmd *cmd, | |
1486 | struct target_core_fabric_ops *tfo, | |
1487 | struct se_session *se_sess, | |
1488 | u32 data_length, | |
1489 | int data_direction, | |
1490 | int task_attr, | |
1491 | unsigned char *sense_buffer) | |
1492 | { | |
5951146d AG |
1493 | INIT_LIST_HEAD(&cmd->se_lun_node); |
1494 | INIT_LIST_HEAD(&cmd->se_delayed_node); | |
07bde79a | 1495 | INIT_LIST_HEAD(&cmd->se_qf_node); |
79a7fef2 | 1496 | INIT_LIST_HEAD(&cmd->se_queue_node); |
a17f091d | 1497 | INIT_LIST_HEAD(&cmd->se_cmd_list); |
a1d8b49a AG |
1498 | INIT_LIST_HEAD(&cmd->t_task_list); |
1499 | init_completion(&cmd->transport_lun_fe_stop_comp); | |
1500 | init_completion(&cmd->transport_lun_stop_comp); | |
1501 | init_completion(&cmd->t_transport_stop_comp); | |
a17f091d | 1502 | init_completion(&cmd->cmd_wait_comp); |
a1d8b49a AG |
1503 | spin_lock_init(&cmd->t_state_lock); |
1504 | atomic_set(&cmd->transport_dev_active, 1); | |
c66ac9db NB |
1505 | |
1506 | cmd->se_tfo = tfo; | |
1507 | cmd->se_sess = se_sess; | |
1508 | cmd->data_length = data_length; | |
1509 | cmd->data_direction = data_direction; | |
1510 | cmd->sam_task_attr = task_attr; | |
1511 | cmd->sense_buffer = sense_buffer; | |
1512 | } | |
1513 | EXPORT_SYMBOL(transport_init_se_cmd); | |
1514 | ||
1515 | static int transport_check_alloc_task_attr(struct se_cmd *cmd) | |
1516 | { | |
1517 | /* | |
1518 | * Check if SAM Task Attribute emulation is enabled for this | |
1519 | * struct se_device storage object | |
1520 | */ | |
5951146d | 1521 | if (cmd->se_dev->dev_task_attr_type != SAM_TASK_ATTR_EMULATED) |
c66ac9db NB |
1522 | return 0; |
1523 | ||
e66ecd50 | 1524 | if (cmd->sam_task_attr == MSG_ACA_TAG) { |
6708bb27 | 1525 | pr_debug("SAM Task Attribute ACA" |
c66ac9db | 1526 | " emulation is not supported\n"); |
e3d6f909 | 1527 | return -EINVAL; |
c66ac9db NB |
1528 | } |
1529 | /* | |
1530 | * Used to determine when ORDERED commands should go from | |
1531 | * Dormant to Active status. | |
1532 | */ | |
5951146d | 1533 | cmd->se_ordered_id = atomic_inc_return(&cmd->se_dev->dev_ordered_id); |
c66ac9db | 1534 | smp_mb__after_atomic_inc(); |
6708bb27 | 1535 | pr_debug("Allocated se_ordered_id: %u for Task Attr: 0x%02x on %s\n", |
c66ac9db | 1536 | cmd->se_ordered_id, cmd->sam_task_attr, |
6708bb27 | 1537 | cmd->se_dev->transport->name); |
c66ac9db NB |
1538 | return 0; |
1539 | } | |
1540 | ||
c66ac9db NB |
1541 | /* transport_generic_allocate_tasks(): |
1542 | * | |
1543 | * Called from fabric RX Thread. | |
1544 | */ | |
1545 | int transport_generic_allocate_tasks( | |
1546 | struct se_cmd *cmd, | |
1547 | unsigned char *cdb) | |
1548 | { | |
1549 | int ret; | |
1550 | ||
1551 | transport_generic_prepare_cdb(cdb); | |
c66ac9db NB |
1552 | /* |
1553 | * Ensure that the received CDB is less than the max (252 + 8) bytes | |
1554 | * for VARIABLE_LENGTH_CMD | |
1555 | */ | |
1556 | if (scsi_command_size(cdb) > SCSI_MAX_VARLEN_CDB_SIZE) { | |
6708bb27 | 1557 | pr_err("Received SCSI CDB with command_size: %d that" |
c66ac9db NB |
1558 | " exceeds SCSI_MAX_VARLEN_CDB_SIZE: %d\n", |
1559 | scsi_command_size(cdb), SCSI_MAX_VARLEN_CDB_SIZE); | |
03e98c9e NB |
1560 | cmd->se_cmd_flags |= SCF_SCSI_CDB_EXCEPTION; |
1561 | cmd->scsi_sense_reason = TCM_INVALID_CDB_FIELD; | |
e3d6f909 | 1562 | return -EINVAL; |
c66ac9db NB |
1563 | } |
1564 | /* | |
1565 | * If the received CDB is larger than TCM_MAX_COMMAND_SIZE, | |
1566 | * allocate the additional extended CDB buffer now.. Otherwise | |
1567 | * setup the pointer from __t_task_cdb to t_task_cdb. | |
1568 | */ | |
a1d8b49a AG |
1569 | if (scsi_command_size(cdb) > sizeof(cmd->__t_task_cdb)) { |
1570 | cmd->t_task_cdb = kzalloc(scsi_command_size(cdb), | |
c66ac9db | 1571 | GFP_KERNEL); |
6708bb27 AG |
1572 | if (!cmd->t_task_cdb) { |
1573 | pr_err("Unable to allocate cmd->t_task_cdb" | |
a1d8b49a | 1574 | " %u > sizeof(cmd->__t_task_cdb): %lu ops\n", |
c66ac9db | 1575 | scsi_command_size(cdb), |
a1d8b49a | 1576 | (unsigned long)sizeof(cmd->__t_task_cdb)); |
03e98c9e NB |
1577 | cmd->se_cmd_flags |= SCF_SCSI_CDB_EXCEPTION; |
1578 | cmd->scsi_sense_reason = | |
1579 | TCM_LOGICAL_UNIT_COMMUNICATION_FAILURE; | |
e3d6f909 | 1580 | return -ENOMEM; |
c66ac9db NB |
1581 | } |
1582 | } else | |
a1d8b49a | 1583 | cmd->t_task_cdb = &cmd->__t_task_cdb[0]; |
c66ac9db | 1584 | /* |
a1d8b49a | 1585 | * Copy the original CDB into cmd-> |
c66ac9db | 1586 | */ |
a1d8b49a | 1587 | memcpy(cmd->t_task_cdb, cdb, scsi_command_size(cdb)); |
c66ac9db NB |
1588 | /* |
1589 | * Setup the received CDB based on SCSI defined opcodes and | |
1590 | * perform unit attention, persistent reservations and ALUA | |
a1d8b49a | 1591 | * checks for virtual device backends. The cmd->t_task_cdb |
c66ac9db NB |
1592 | * pointer is expected to be setup before we reach this point. |
1593 | */ | |
1594 | ret = transport_generic_cmd_sequencer(cmd, cdb); | |
1595 | if (ret < 0) | |
1596 | return ret; | |
1597 | /* | |
1598 | * Check for SAM Task Attribute Emulation | |
1599 | */ | |
1600 | if (transport_check_alloc_task_attr(cmd) < 0) { | |
1601 | cmd->se_cmd_flags |= SCF_SCSI_CDB_EXCEPTION; | |
1602 | cmd->scsi_sense_reason = TCM_INVALID_CDB_FIELD; | |
5951146d | 1603 | return -EINVAL; |
c66ac9db NB |
1604 | } |
1605 | spin_lock(&cmd->se_lun->lun_sep_lock); | |
1606 | if (cmd->se_lun->lun_sep) | |
1607 | cmd->se_lun->lun_sep->sep_stats.cmd_pdus++; | |
1608 | spin_unlock(&cmd->se_lun->lun_sep_lock); | |
1609 | return 0; | |
1610 | } | |
1611 | EXPORT_SYMBOL(transport_generic_allocate_tasks); | |
1612 | ||
695434e1 NB |
1613 | /* |
1614 | * Used by fabric module frontends to queue tasks directly. | |
1615 | * Many only be used from process context only | |
1616 | */ | |
1617 | int transport_handle_cdb_direct( | |
1618 | struct se_cmd *cmd) | |
1619 | { | |
dd8ae59d NB |
1620 | int ret; |
1621 | ||
695434e1 NB |
1622 | if (!cmd->se_lun) { |
1623 | dump_stack(); | |
6708bb27 | 1624 | pr_err("cmd->se_lun is NULL\n"); |
695434e1 NB |
1625 | return -EINVAL; |
1626 | } | |
1627 | if (in_interrupt()) { | |
1628 | dump_stack(); | |
6708bb27 | 1629 | pr_err("transport_generic_handle_cdb cannot be called" |
695434e1 NB |
1630 | " from interrupt context\n"); |
1631 | return -EINVAL; | |
1632 | } | |
dd8ae59d NB |
1633 | /* |
1634 | * Set TRANSPORT_NEW_CMD state and cmd->t_transport_active=1 following | |
1635 | * transport_generic_handle_cdb*() -> transport_add_cmd_to_queue() | |
1636 | * in existing usage to ensure that outstanding descriptors are handled | |
d14921d6 | 1637 | * correctly during shutdown via transport_wait_for_tasks() |
dd8ae59d NB |
1638 | * |
1639 | * Also, we don't take cmd->t_state_lock here as we only expect | |
1640 | * this to be called for initial descriptor submission. | |
1641 | */ | |
1642 | cmd->t_state = TRANSPORT_NEW_CMD; | |
1643 | atomic_set(&cmd->t_transport_active, 1); | |
1644 | /* | |
1645 | * transport_generic_new_cmd() is already handling QUEUE_FULL, | |
1646 | * so follow TRANSPORT_NEW_CMD processing thread context usage | |
1647 | * and call transport_generic_request_failure() if necessary.. | |
1648 | */ | |
1649 | ret = transport_generic_new_cmd(cmd); | |
03e98c9e NB |
1650 | if (ret < 0) |
1651 | transport_generic_request_failure(cmd); | |
1652 | ||
dd8ae59d | 1653 | return 0; |
695434e1 NB |
1654 | } |
1655 | EXPORT_SYMBOL(transport_handle_cdb_direct); | |
1656 | ||
c66ac9db NB |
1657 | /* |
1658 | * Used by fabric module frontends defining a TFO->new_cmd_map() caller | |
1659 | * to queue up a newly setup se_cmd w/ TRANSPORT_NEW_CMD_MAP in order to | |
1660 | * complete setup in TCM process context w/ TFO->new_cmd_map(). | |
1661 | */ | |
1662 | int transport_generic_handle_cdb_map( | |
1663 | struct se_cmd *cmd) | |
1664 | { | |
e3d6f909 | 1665 | if (!cmd->se_lun) { |
c66ac9db | 1666 | dump_stack(); |
6708bb27 | 1667 | pr_err("cmd->se_lun is NULL\n"); |
e3d6f909 | 1668 | return -EINVAL; |
c66ac9db NB |
1669 | } |
1670 | ||
f7a5cc0b | 1671 | transport_add_cmd_to_queue(cmd, TRANSPORT_NEW_CMD_MAP, false); |
c66ac9db NB |
1672 | return 0; |
1673 | } | |
1674 | EXPORT_SYMBOL(transport_generic_handle_cdb_map); | |
1675 | ||
1676 | /* transport_generic_handle_data(): | |
1677 | * | |
1678 | * | |
1679 | */ | |
1680 | int transport_generic_handle_data( | |
1681 | struct se_cmd *cmd) | |
1682 | { | |
1683 | /* | |
1684 | * For the software fabric case, then we assume the nexus is being | |
1685 | * failed/shutdown when signals are pending from the kthread context | |
1686 | * caller, so we return a failure. For the HW target mode case running | |
1687 | * in interrupt code, the signal_pending() check is skipped. | |
1688 | */ | |
1689 | if (!in_interrupt() && signal_pending(current)) | |
e3d6f909 | 1690 | return -EPERM; |
c66ac9db NB |
1691 | /* |
1692 | * If the received CDB has aleady been ABORTED by the generic | |
1693 | * target engine, we now call transport_check_aborted_status() | |
1694 | * to queue any delated TASK_ABORTED status for the received CDB to the | |
25985edc | 1695 | * fabric module as we are expecting no further incoming DATA OUT |
c66ac9db NB |
1696 | * sequences at this point. |
1697 | */ | |
1698 | if (transport_check_aborted_status(cmd, 1) != 0) | |
1699 | return 0; | |
1700 | ||
f7a5cc0b | 1701 | transport_add_cmd_to_queue(cmd, TRANSPORT_PROCESS_WRITE, false); |
c66ac9db NB |
1702 | return 0; |
1703 | } | |
1704 | EXPORT_SYMBOL(transport_generic_handle_data); | |
1705 | ||
1706 | /* transport_generic_handle_tmr(): | |
1707 | * | |
1708 | * | |
1709 | */ | |
1710 | int transport_generic_handle_tmr( | |
1711 | struct se_cmd *cmd) | |
1712 | { | |
f7a5cc0b | 1713 | transport_add_cmd_to_queue(cmd, TRANSPORT_PROCESS_TMR, false); |
c66ac9db NB |
1714 | return 0; |
1715 | } | |
1716 | EXPORT_SYMBOL(transport_generic_handle_tmr); | |
1717 | ||
cdbb70bb CH |
1718 | /* |
1719 | * If the task is active, request it to be stopped and sleep until it | |
1720 | * has completed. | |
1721 | */ | |
1722 | bool target_stop_task(struct se_task *task, unsigned long *flags) | |
1723 | { | |
1724 | struct se_cmd *cmd = task->task_se_cmd; | |
1725 | bool was_active = false; | |
1726 | ||
1727 | if (task->task_flags & TF_ACTIVE) { | |
1728 | task->task_flags |= TF_REQUEST_STOP; | |
1729 | spin_unlock_irqrestore(&cmd->t_state_lock, *flags); | |
1730 | ||
1731 | pr_debug("Task %p waiting to complete\n", task); | |
1732 | wait_for_completion(&task->task_stop_comp); | |
1733 | pr_debug("Task %p stopped successfully\n", task); | |
1734 | ||
1735 | spin_lock_irqsave(&cmd->t_state_lock, *flags); | |
1736 | atomic_dec(&cmd->t_task_cdbs_left); | |
1737 | task->task_flags &= ~(TF_ACTIVE | TF_REQUEST_STOP); | |
1738 | was_active = true; | |
1739 | } | |
1740 | ||
cdbb70bb CH |
1741 | return was_active; |
1742 | } | |
1743 | ||
c66ac9db NB |
1744 | static int transport_stop_tasks_for_cmd(struct se_cmd *cmd) |
1745 | { | |
1746 | struct se_task *task, *task_tmp; | |
1747 | unsigned long flags; | |
1748 | int ret = 0; | |
1749 | ||
6708bb27 | 1750 | pr_debug("ITT[0x%08x] - Stopping tasks\n", |
e3d6f909 | 1751 | cmd->se_tfo->get_task_tag(cmd)); |
c66ac9db NB |
1752 | |
1753 | /* | |
1754 | * No tasks remain in the execution queue | |
1755 | */ | |
a1d8b49a | 1756 | spin_lock_irqsave(&cmd->t_state_lock, flags); |
c66ac9db | 1757 | list_for_each_entry_safe(task, task_tmp, |
a1d8b49a | 1758 | &cmd->t_task_list, t_list) { |
04629b7b | 1759 | pr_debug("Processing task %p\n", task); |
c66ac9db NB |
1760 | /* |
1761 | * If the struct se_task has not been sent and is not active, | |
1762 | * remove the struct se_task from the execution queue. | |
1763 | */ | |
6c76bf95 | 1764 | if (!(task->task_flags & (TF_ACTIVE | TF_SENT))) { |
a1d8b49a | 1765 | spin_unlock_irqrestore(&cmd->t_state_lock, |
c66ac9db NB |
1766 | flags); |
1767 | transport_remove_task_from_execute_queue(task, | |
42bf829e | 1768 | cmd->se_dev); |
c66ac9db | 1769 | |
04629b7b | 1770 | pr_debug("Task %p removed from execute queue\n", task); |
a1d8b49a | 1771 | spin_lock_irqsave(&cmd->t_state_lock, flags); |
c66ac9db NB |
1772 | continue; |
1773 | } | |
1774 | ||
cdbb70bb | 1775 | if (!target_stop_task(task, &flags)) { |
04629b7b | 1776 | pr_debug("Task %p - did nothing\n", task); |
c66ac9db NB |
1777 | ret++; |
1778 | } | |
c66ac9db | 1779 | } |
a1d8b49a | 1780 | spin_unlock_irqrestore(&cmd->t_state_lock, flags); |
c66ac9db NB |
1781 | |
1782 | return ret; | |
1783 | } | |
1784 | ||
c66ac9db NB |
1785 | /* |
1786 | * Handle SAM-esque emulation for generic transport request failures. | |
1787 | */ | |
03e98c9e | 1788 | static void transport_generic_request_failure(struct se_cmd *cmd) |
c66ac9db | 1789 | { |
07bde79a NB |
1790 | int ret = 0; |
1791 | ||
6708bb27 | 1792 | pr_debug("-----[ Storage Engine Exception for cmd: %p ITT: 0x%08x" |
e3d6f909 | 1793 | " CDB: 0x%02x\n", cmd, cmd->se_tfo->get_task_tag(cmd), |
a1d8b49a | 1794 | cmd->t_task_cdb[0]); |
03e98c9e | 1795 | pr_debug("-----[ i_state: %d t_state: %d scsi_sense_reason: %d\n", |
e3d6f909 | 1796 | cmd->se_tfo->get_cmd_state(cmd), |
03e98c9e | 1797 | cmd->t_state, cmd->scsi_sense_reason); |
6708bb27 | 1798 | pr_debug("-----[ t_tasks: %d t_task_cdbs_left: %d" |
c66ac9db NB |
1799 | " t_task_cdbs_sent: %d t_task_cdbs_ex_left: %d --" |
1800 | " t_transport_active: %d t_transport_stop: %d" | |
6708bb27 | 1801 | " t_transport_sent: %d\n", cmd->t_task_list_num, |
a1d8b49a AG |
1802 | atomic_read(&cmd->t_task_cdbs_left), |
1803 | atomic_read(&cmd->t_task_cdbs_sent), | |
1804 | atomic_read(&cmd->t_task_cdbs_ex_left), | |
1805 | atomic_read(&cmd->t_transport_active), | |
1806 | atomic_read(&cmd->t_transport_stop), | |
1807 | atomic_read(&cmd->t_transport_sent)); | |
c66ac9db | 1808 | |
c66ac9db NB |
1809 | /* |
1810 | * For SAM Task Attribute emulation for failed struct se_cmd | |
1811 | */ | |
1812 | if (cmd->se_dev->dev_task_attr_type == SAM_TASK_ATTR_EMULATED) | |
1813 | transport_complete_task_attr(cmd); | |
1814 | ||
03e98c9e NB |
1815 | switch (cmd->scsi_sense_reason) { |
1816 | case TCM_NON_EXISTENT_LUN: | |
1817 | case TCM_UNSUPPORTED_SCSI_OPCODE: | |
1818 | case TCM_INVALID_CDB_FIELD: | |
1819 | case TCM_INVALID_PARAMETER_LIST: | |
1820 | case TCM_LOGICAL_UNIT_COMMUNICATION_FAILURE: | |
1821 | case TCM_UNKNOWN_MODE_PAGE: | |
1822 | case TCM_WRITE_PROTECTED: | |
1823 | case TCM_CHECK_CONDITION_ABORT_CMD: | |
1824 | case TCM_CHECK_CONDITION_UNIT_ATTENTION: | |
1825 | case TCM_CHECK_CONDITION_NOT_READY: | |
c66ac9db | 1826 | break; |
03e98c9e | 1827 | case TCM_RESERVATION_CONFLICT: |
c66ac9db NB |
1828 | /* |
1829 | * No SENSE Data payload for this case, set SCSI Status | |
1830 | * and queue the response to $FABRIC_MOD. | |
1831 | * | |
1832 | * Uses linux/include/scsi/scsi.h SAM status codes defs | |
1833 | */ | |
1834 | cmd->scsi_status = SAM_STAT_RESERVATION_CONFLICT; | |
1835 | /* | |
1836 | * For UA Interlock Code 11b, a RESERVATION CONFLICT will | |
1837 | * establish a UNIT ATTENTION with PREVIOUS RESERVATION | |
1838 | * CONFLICT STATUS. | |
1839 | * | |
1840 | * See spc4r17, section 7.4.6 Control Mode Page, Table 349 | |
1841 | */ | |
e3d6f909 AG |
1842 | if (cmd->se_sess && |
1843 | cmd->se_dev->se_sub_dev->se_dev_attrib.emulate_ua_intlck_ctrl == 2) | |
1844 | core_scsi3_ua_allocate(cmd->se_sess->se_node_acl, | |
c66ac9db NB |
1845 | cmd->orig_fe_lun, 0x2C, |
1846 | ASCQ_2CH_PREVIOUS_RESERVATION_CONFLICT_STATUS); | |
1847 | ||
07bde79a | 1848 | ret = cmd->se_tfo->queue_status(cmd); |
f147abb4 | 1849 | if (ret == -EAGAIN || ret == -ENOMEM) |
07bde79a | 1850 | goto queue_full; |
c66ac9db | 1851 | goto check_stop; |
c66ac9db | 1852 | default: |
6708bb27 | 1853 | pr_err("Unknown transport error for CDB 0x%02x: %d\n", |
03e98c9e | 1854 | cmd->t_task_cdb[0], cmd->scsi_sense_reason); |
c66ac9db NB |
1855 | cmd->scsi_sense_reason = TCM_UNSUPPORTED_SCSI_OPCODE; |
1856 | break; | |
1857 | } | |
16ab8e60 NB |
1858 | /* |
1859 | * If a fabric does not define a cmd->se_tfo->new_cmd_map caller, | |
1860 | * make the call to transport_send_check_condition_and_sense() | |
1861 | * directly. Otherwise expect the fabric to make the call to | |
1862 | * transport_send_check_condition_and_sense() after handling | |
1863 | * possible unsoliticied write data payloads. | |
1864 | */ | |
03e98c9e NB |
1865 | ret = transport_send_check_condition_and_sense(cmd, |
1866 | cmd->scsi_sense_reason, 0); | |
1867 | if (ret == -EAGAIN || ret == -ENOMEM) | |
1868 | goto queue_full; | |
07bde79a | 1869 | |
c66ac9db NB |
1870 | check_stop: |
1871 | transport_lun_remove_cmd(cmd); | |
6708bb27 | 1872 | if (!transport_cmd_check_stop_to_fabric(cmd)) |
c66ac9db | 1873 | ; |
07bde79a NB |
1874 | return; |
1875 | ||
1876 | queue_full: | |
e057f533 CH |
1877 | cmd->t_state = TRANSPORT_COMPLETE_QF_OK; |
1878 | transport_handle_queue_full(cmd, cmd->se_dev); | |
c66ac9db NB |
1879 | } |
1880 | ||
c66ac9db NB |
1881 | static inline u32 transport_lba_21(unsigned char *cdb) |
1882 | { | |
1883 | return ((cdb[1] & 0x1f) << 16) | (cdb[2] << 8) | cdb[3]; | |
1884 | } | |
1885 | ||
1886 | static inline u32 transport_lba_32(unsigned char *cdb) | |
1887 | { | |
1888 | return (cdb[2] << 24) | (cdb[3] << 16) | (cdb[4] << 8) | cdb[5]; | |
1889 | } | |
1890 | ||
1891 | static inline unsigned long long transport_lba_64(unsigned char *cdb) | |
1892 | { | |
1893 | unsigned int __v1, __v2; | |
1894 | ||
1895 | __v1 = (cdb[2] << 24) | (cdb[3] << 16) | (cdb[4] << 8) | cdb[5]; | |
1896 | __v2 = (cdb[6] << 24) | (cdb[7] << 16) | (cdb[8] << 8) | cdb[9]; | |
1897 | ||
1898 | return ((unsigned long long)__v2) | (unsigned long long)__v1 << 32; | |
1899 | } | |
1900 | ||
1901 | /* | |
1902 | * For VARIABLE_LENGTH_CDB w/ 32 byte extended CDBs | |
1903 | */ | |
1904 | static inline unsigned long long transport_lba_64_ext(unsigned char *cdb) | |
1905 | { | |
1906 | unsigned int __v1, __v2; | |
1907 | ||
1908 | __v1 = (cdb[12] << 24) | (cdb[13] << 16) | (cdb[14] << 8) | cdb[15]; | |
1909 | __v2 = (cdb[16] << 24) | (cdb[17] << 16) | (cdb[18] << 8) | cdb[19]; | |
1910 | ||
1911 | return ((unsigned long long)__v2) | (unsigned long long)__v1 << 32; | |
1912 | } | |
1913 | ||
1914 | static void transport_set_supported_SAM_opcode(struct se_cmd *se_cmd) | |
1915 | { | |
1916 | unsigned long flags; | |
1917 | ||
a1d8b49a | 1918 | spin_lock_irqsave(&se_cmd->t_state_lock, flags); |
c66ac9db | 1919 | se_cmd->se_cmd_flags |= SCF_SUPPORTED_SAM_OPCODE; |
a1d8b49a | 1920 | spin_unlock_irqrestore(&se_cmd->t_state_lock, flags); |
c66ac9db NB |
1921 | } |
1922 | ||
c66ac9db NB |
1923 | static inline int transport_tcq_window_closed(struct se_device *dev) |
1924 | { | |
1925 | if (dev->dev_tcq_window_closed++ < | |
1926 | PYX_TRANSPORT_WINDOW_CLOSED_THRESHOLD) { | |
1927 | msleep(PYX_TRANSPORT_WINDOW_CLOSED_WAIT_SHORT); | |
1928 | } else | |
1929 | msleep(PYX_TRANSPORT_WINDOW_CLOSED_WAIT_LONG); | |
1930 | ||
e3d6f909 | 1931 | wake_up_interruptible(&dev->dev_queue_obj.thread_wq); |
c66ac9db NB |
1932 | return 0; |
1933 | } | |
1934 | ||
1935 | /* | |
1936 | * Called from Fabric Module context from transport_execute_tasks() | |
1937 | * | |
1938 | * The return of this function determins if the tasks from struct se_cmd | |
1939 | * get added to the execution queue in transport_execute_tasks(), | |
1940 | * or are added to the delayed or ordered lists here. | |
1941 | */ | |
1942 | static inline int transport_execute_task_attr(struct se_cmd *cmd) | |
1943 | { | |
5951146d | 1944 | if (cmd->se_dev->dev_task_attr_type != SAM_TASK_ATTR_EMULATED) |
c66ac9db NB |
1945 | return 1; |
1946 | /* | |
25985edc | 1947 | * Check for the existence of HEAD_OF_QUEUE, and if true return 1 |
c66ac9db NB |
1948 | * to allow the passed struct se_cmd list of tasks to the front of the list. |
1949 | */ | |
e66ecd50 | 1950 | if (cmd->sam_task_attr == MSG_HEAD_TAG) { |
6708bb27 | 1951 | pr_debug("Added HEAD_OF_QUEUE for CDB:" |
c66ac9db | 1952 | " 0x%02x, se_ordered_id: %u\n", |
6708bb27 | 1953 | cmd->t_task_cdb[0], |
c66ac9db NB |
1954 | cmd->se_ordered_id); |
1955 | return 1; | |
e66ecd50 | 1956 | } else if (cmd->sam_task_attr == MSG_ORDERED_TAG) { |
5951146d | 1957 | atomic_inc(&cmd->se_dev->dev_ordered_sync); |
c66ac9db NB |
1958 | smp_mb__after_atomic_inc(); |
1959 | ||
6708bb27 | 1960 | pr_debug("Added ORDERED for CDB: 0x%02x to ordered" |
c66ac9db | 1961 | " list, se_ordered_id: %u\n", |
a1d8b49a | 1962 | cmd->t_task_cdb[0], |
c66ac9db NB |
1963 | cmd->se_ordered_id); |
1964 | /* | |
1965 | * Add ORDERED command to tail of execution queue if | |
1966 | * no other older commands exist that need to be | |
1967 | * completed first. | |
1968 | */ | |
6708bb27 | 1969 | if (!atomic_read(&cmd->se_dev->simple_cmds)) |
c66ac9db NB |
1970 | return 1; |
1971 | } else { | |
1972 | /* | |
1973 | * For SIMPLE and UNTAGGED Task Attribute commands | |
1974 | */ | |
5951146d | 1975 | atomic_inc(&cmd->se_dev->simple_cmds); |
c66ac9db NB |
1976 | smp_mb__after_atomic_inc(); |
1977 | } | |
1978 | /* | |
1979 | * Otherwise if one or more outstanding ORDERED task attribute exist, | |
1980 | * add the dormant task(s) built for the passed struct se_cmd to the | |
1981 | * execution queue and become in Active state for this struct se_device. | |
1982 | */ | |
5951146d | 1983 | if (atomic_read(&cmd->se_dev->dev_ordered_sync) != 0) { |
c66ac9db NB |
1984 | /* |
1985 | * Otherwise, add cmd w/ tasks to delayed cmd queue that | |
25985edc | 1986 | * will be drained upon completion of HEAD_OF_QUEUE task. |
c66ac9db | 1987 | */ |
5951146d | 1988 | spin_lock(&cmd->se_dev->delayed_cmd_lock); |
c66ac9db | 1989 | cmd->se_cmd_flags |= SCF_DELAYED_CMD_FROM_SAM_ATTR; |
5951146d AG |
1990 | list_add_tail(&cmd->se_delayed_node, |
1991 | &cmd->se_dev->delayed_cmd_list); | |
1992 | spin_unlock(&cmd->se_dev->delayed_cmd_lock); | |
c66ac9db | 1993 | |
6708bb27 | 1994 | pr_debug("Added CDB: 0x%02x Task Attr: 0x%02x to" |
c66ac9db | 1995 | " delayed CMD list, se_ordered_id: %u\n", |
a1d8b49a | 1996 | cmd->t_task_cdb[0], cmd->sam_task_attr, |
c66ac9db NB |
1997 | cmd->se_ordered_id); |
1998 | /* | |
1999 | * Return zero to let transport_execute_tasks() know | |
2000 | * not to add the delayed tasks to the execution list. | |
2001 | */ | |
2002 | return 0; | |
2003 | } | |
2004 | /* | |
2005 | * Otherwise, no ORDERED task attributes exist.. | |
2006 | */ | |
2007 | return 1; | |
2008 | } | |
2009 | ||
2010 | /* | |
2011 | * Called from fabric module context in transport_generic_new_cmd() and | |
2012 | * transport_generic_process_write() | |
2013 | */ | |
2014 | static int transport_execute_tasks(struct se_cmd *cmd) | |
2015 | { | |
2016 | int add_tasks; | |
2017 | ||
58a2801a | 2018 | if (se_dev_check_online(cmd->se_dev) != 0) { |
03e98c9e NB |
2019 | cmd->scsi_sense_reason = TCM_LOGICAL_UNIT_COMMUNICATION_FAILURE; |
2020 | transport_generic_request_failure(cmd); | |
db1620a2 | 2021 | return 0; |
c66ac9db | 2022 | } |
db1620a2 | 2023 | |
c66ac9db NB |
2024 | /* |
2025 | * Call transport_cmd_check_stop() to see if a fabric exception | |
25985edc | 2026 | * has occurred that prevents execution. |
c66ac9db | 2027 | */ |
6708bb27 | 2028 | if (!transport_cmd_check_stop(cmd, 0, TRANSPORT_PROCESSING)) { |
c66ac9db NB |
2029 | /* |
2030 | * Check for SAM Task Attribute emulation and HEAD_OF_QUEUE | |
2031 | * attribute for the tasks of the received struct se_cmd CDB | |
2032 | */ | |
2033 | add_tasks = transport_execute_task_attr(cmd); | |
e3d6f909 | 2034 | if (!add_tasks) |
c66ac9db NB |
2035 | goto execute_tasks; |
2036 | /* | |
2037 | * This calls transport_add_tasks_from_cmd() to handle | |
2038 | * HEAD_OF_QUEUE ordering for SAM Task Attribute emulation | |
2039 | * (if enabled) in __transport_add_task_to_execute_queue() and | |
2040 | * transport_add_task_check_sam_attr(). | |
2041 | */ | |
2042 | transport_add_tasks_from_cmd(cmd); | |
2043 | } | |
2044 | /* | |
2045 | * Kick the execution queue for the cmd associated struct se_device | |
2046 | * storage object. | |
2047 | */ | |
2048 | execute_tasks: | |
5951146d | 2049 | __transport_execute_tasks(cmd->se_dev); |
c66ac9db NB |
2050 | return 0; |
2051 | } | |
2052 | ||
2053 | /* | |
2054 | * Called to check struct se_device tcq depth window, and once open pull struct se_task | |
2055 | * from struct se_device->execute_task_list and | |
2056 | * | |
2057 | * Called from transport_processing_thread() | |
2058 | */ | |
2059 | static int __transport_execute_tasks(struct se_device *dev) | |
2060 | { | |
2061 | int error; | |
2062 | struct se_cmd *cmd = NULL; | |
e3d6f909 | 2063 | struct se_task *task = NULL; |
c66ac9db NB |
2064 | unsigned long flags; |
2065 | ||
2066 | /* | |
2067 | * Check if there is enough room in the device and HBA queue to send | |
a1d8b49a | 2068 | * struct se_tasks to the selected transport. |
c66ac9db NB |
2069 | */ |
2070 | check_depth: | |
e3d6f909 | 2071 | if (!atomic_read(&dev->depth_left)) |
c66ac9db | 2072 | return transport_tcq_window_closed(dev); |
c66ac9db | 2073 | |
e3d6f909 | 2074 | dev->dev_tcq_window_closed = 0; |
c66ac9db | 2075 | |
e3d6f909 AG |
2076 | spin_lock_irq(&dev->execute_task_lock); |
2077 | if (list_empty(&dev->execute_task_list)) { | |
2078 | spin_unlock_irq(&dev->execute_task_lock); | |
c66ac9db NB |
2079 | return 0; |
2080 | } | |
e3d6f909 AG |
2081 | task = list_first_entry(&dev->execute_task_list, |
2082 | struct se_task, t_execute_list); | |
04629b7b | 2083 | __transport_remove_task_from_execute_queue(task, dev); |
e3d6f909 | 2084 | spin_unlock_irq(&dev->execute_task_lock); |
c66ac9db NB |
2085 | |
2086 | atomic_dec(&dev->depth_left); | |
c66ac9db | 2087 | |
e3d6f909 | 2088 | cmd = task->task_se_cmd; |
c66ac9db | 2089 | |
a1d8b49a | 2090 | spin_lock_irqsave(&cmd->t_state_lock, flags); |
6c76bf95 | 2091 | task->task_flags |= (TF_ACTIVE | TF_SENT); |
a1d8b49a | 2092 | atomic_inc(&cmd->t_task_cdbs_sent); |
c66ac9db | 2093 | |
a1d8b49a AG |
2094 | if (atomic_read(&cmd->t_task_cdbs_sent) == |
2095 | cmd->t_task_list_num) | |
415a090a | 2096 | atomic_set(&cmd->t_transport_sent, 1); |
c66ac9db | 2097 | |
a1d8b49a | 2098 | spin_unlock_irqrestore(&cmd->t_state_lock, flags); |
c66ac9db | 2099 | |
5bda90c8 CH |
2100 | if (cmd->execute_task) |
2101 | error = cmd->execute_task(task); | |
2102 | else | |
2103 | error = dev->transport->do_task(task); | |
d29a5b6a | 2104 | if (error != 0) { |
d29a5b6a CH |
2105 | spin_lock_irqsave(&cmd->t_state_lock, flags); |
2106 | task->task_flags &= ~TF_ACTIVE; | |
2107 | spin_unlock_irqrestore(&cmd->t_state_lock, flags); | |
2108 | atomic_set(&cmd->t_transport_sent, 0); | |
2109 | transport_stop_tasks_for_cmd(cmd); | |
2110 | atomic_inc(&dev->depth_left); | |
03e98c9e | 2111 | transport_generic_request_failure(cmd); |
c66ac9db NB |
2112 | } |
2113 | ||
2114 | goto check_depth; | |
2115 | ||
2116 | return 0; | |
2117 | } | |
2118 | ||
c66ac9db NB |
2119 | static inline u32 transport_get_sectors_6( |
2120 | unsigned char *cdb, | |
2121 | struct se_cmd *cmd, | |
2122 | int *ret) | |
2123 | { | |
5951146d | 2124 | struct se_device *dev = cmd->se_dev; |
c66ac9db NB |
2125 | |
2126 | /* | |
2127 | * Assume TYPE_DISK for non struct se_device objects. | |
2128 | * Use 8-bit sector value. | |
2129 | */ | |
2130 | if (!dev) | |
2131 | goto type_disk; | |
2132 | ||
2133 | /* | |
2134 | * Use 24-bit allocation length for TYPE_TAPE. | |
2135 | */ | |
e3d6f909 | 2136 | if (dev->transport->get_device_type(dev) == TYPE_TAPE) |
c66ac9db NB |
2137 | return (u32)(cdb[2] << 16) + (cdb[3] << 8) + cdb[4]; |
2138 | ||
2139 | /* | |
2140 | * Everything else assume TYPE_DISK Sector CDB location. | |
9b5cd7f3 RD |
2141 | * Use 8-bit sector value. SBC-3 says: |
2142 | * | |
2143 | * A TRANSFER LENGTH field set to zero specifies that 256 | |
2144 | * logical blocks shall be written. Any other value | |
2145 | * specifies the number of logical blocks that shall be | |
2146 | * written. | |
c66ac9db NB |
2147 | */ |
2148 | type_disk: | |
9b5cd7f3 | 2149 | return cdb[4] ? : 256; |
c66ac9db NB |
2150 | } |
2151 | ||
2152 | static inline u32 transport_get_sectors_10( | |
2153 | unsigned char *cdb, | |
2154 | struct se_cmd *cmd, | |
2155 | int *ret) | |
2156 | { | |
5951146d | 2157 | struct se_device *dev = cmd->se_dev; |
c66ac9db NB |
2158 | |
2159 | /* | |
2160 | * Assume TYPE_DISK for non struct se_device objects. | |
2161 | * Use 16-bit sector value. | |
2162 | */ | |
2163 | if (!dev) | |
2164 | goto type_disk; | |
2165 | ||
2166 | /* | |
2167 | * XXX_10 is not defined in SSC, throw an exception | |
2168 | */ | |
e3d6f909 AG |
2169 | if (dev->transport->get_device_type(dev) == TYPE_TAPE) { |
2170 | *ret = -EINVAL; | |
c66ac9db NB |
2171 | return 0; |
2172 | } | |
2173 | ||
2174 | /* | |
2175 | * Everything else assume TYPE_DISK Sector CDB location. | |
2176 | * Use 16-bit sector value. | |
2177 | */ | |
2178 | type_disk: | |
2179 | return (u32)(cdb[7] << 8) + cdb[8]; | |
2180 | } | |
2181 | ||
2182 | static inline u32 transport_get_sectors_12( | |
2183 | unsigned char *cdb, | |
2184 | struct se_cmd *cmd, | |
2185 | int *ret) | |
2186 | { | |
5951146d | 2187 | struct se_device *dev = cmd->se_dev; |
c66ac9db NB |
2188 | |
2189 | /* | |
2190 | * Assume TYPE_DISK for non struct se_device objects. | |
2191 | * Use 32-bit sector value. | |
2192 | */ | |
2193 | if (!dev) | |
2194 | goto type_disk; | |
2195 | ||
2196 | /* | |
2197 | * XXX_12 is not defined in SSC, throw an exception | |
2198 | */ | |
e3d6f909 AG |
2199 | if (dev->transport->get_device_type(dev) == TYPE_TAPE) { |
2200 | *ret = -EINVAL; | |
c66ac9db NB |
2201 | return 0; |
2202 | } | |
2203 | ||
2204 | /* | |
2205 | * Everything else assume TYPE_DISK Sector CDB location. | |
2206 | * Use 32-bit sector value. | |
2207 | */ | |
2208 | type_disk: | |
2209 | return (u32)(cdb[6] << 24) + (cdb[7] << 16) + (cdb[8] << 8) + cdb[9]; | |
2210 | } | |
2211 | ||
2212 | static inline u32 transport_get_sectors_16( | |
2213 | unsigned char *cdb, | |
2214 | struct se_cmd *cmd, | |
2215 | int *ret) | |
2216 | { | |
5951146d | 2217 | struct se_device *dev = cmd->se_dev; |
c66ac9db NB |
2218 | |
2219 | /* | |
2220 | * Assume TYPE_DISK for non struct se_device objects. | |
2221 | * Use 32-bit sector value. | |
2222 | */ | |
2223 | if (!dev) | |
2224 | goto type_disk; | |
2225 | ||
2226 | /* | |
2227 | * Use 24-bit allocation length for TYPE_TAPE. | |
2228 | */ | |
e3d6f909 | 2229 | if (dev->transport->get_device_type(dev) == TYPE_TAPE) |
c66ac9db NB |
2230 | return (u32)(cdb[12] << 16) + (cdb[13] << 8) + cdb[14]; |
2231 | ||
2232 | type_disk: | |
2233 | return (u32)(cdb[10] << 24) + (cdb[11] << 16) + | |
2234 | (cdb[12] << 8) + cdb[13]; | |
2235 | } | |
2236 | ||
2237 | /* | |
2238 | * Used for VARIABLE_LENGTH_CDB WRITE_32 and READ_32 variants | |
2239 | */ | |
2240 | static inline u32 transport_get_sectors_32( | |
2241 | unsigned char *cdb, | |
2242 | struct se_cmd *cmd, | |
2243 | int *ret) | |
2244 | { | |
2245 | /* | |
2246 | * Assume TYPE_DISK for non struct se_device objects. | |
2247 | * Use 32-bit sector value. | |
2248 | */ | |
2249 | return (u32)(cdb[28] << 24) + (cdb[29] << 16) + | |
2250 | (cdb[30] << 8) + cdb[31]; | |
2251 | ||
2252 | } | |
2253 | ||
2254 | static inline u32 transport_get_size( | |
2255 | u32 sectors, | |
2256 | unsigned char *cdb, | |
2257 | struct se_cmd *cmd) | |
2258 | { | |
5951146d | 2259 | struct se_device *dev = cmd->se_dev; |
c66ac9db | 2260 | |
e3d6f909 | 2261 | if (dev->transport->get_device_type(dev) == TYPE_TAPE) { |
c66ac9db | 2262 | if (cdb[1] & 1) { /* sectors */ |
e3d6f909 | 2263 | return dev->se_sub_dev->se_dev_attrib.block_size * sectors; |
c66ac9db NB |
2264 | } else /* bytes */ |
2265 | return sectors; | |
2266 | } | |
2267 | #if 0 | |
6708bb27 | 2268 | pr_debug("Returning block_size: %u, sectors: %u == %u for" |
e3d6f909 AG |
2269 | " %s object\n", dev->se_sub_dev->se_dev_attrib.block_size, sectors, |
2270 | dev->se_sub_dev->se_dev_attrib.block_size * sectors, | |
2271 | dev->transport->name); | |
c66ac9db | 2272 | #endif |
e3d6f909 | 2273 | return dev->se_sub_dev->se_dev_attrib.block_size * sectors; |
c66ac9db NB |
2274 | } |
2275 | ||
c66ac9db NB |
2276 | static void transport_xor_callback(struct se_cmd *cmd) |
2277 | { | |
2278 | unsigned char *buf, *addr; | |
ec98f782 | 2279 | struct scatterlist *sg; |
c66ac9db NB |
2280 | unsigned int offset; |
2281 | int i; | |
ec98f782 | 2282 | int count; |
c66ac9db NB |
2283 | /* |
2284 | * From sbc3r22.pdf section 5.48 XDWRITEREAD (10) command | |
2285 | * | |
2286 | * 1) read the specified logical block(s); | |
2287 | * 2) transfer logical blocks from the data-out buffer; | |
2288 | * 3) XOR the logical blocks transferred from the data-out buffer with | |
2289 | * the logical blocks read, storing the resulting XOR data in a buffer; | |
2290 | * 4) if the DISABLE WRITE bit is set to zero, then write the logical | |
2291 | * blocks transferred from the data-out buffer; and | |
2292 | * 5) transfer the resulting XOR data to the data-in buffer. | |
2293 | */ | |
2294 | buf = kmalloc(cmd->data_length, GFP_KERNEL); | |
6708bb27 AG |
2295 | if (!buf) { |
2296 | pr_err("Unable to allocate xor_callback buf\n"); | |
c66ac9db NB |
2297 | return; |
2298 | } | |
2299 | /* | |
ec98f782 | 2300 | * Copy the scatterlist WRITE buffer located at cmd->t_data_sg |
c66ac9db NB |
2301 | * into the locally allocated *buf |
2302 | */ | |
ec98f782 AG |
2303 | sg_copy_to_buffer(cmd->t_data_sg, |
2304 | cmd->t_data_nents, | |
2305 | buf, | |
2306 | cmd->data_length); | |
2307 | ||
c66ac9db NB |
2308 | /* |
2309 | * Now perform the XOR against the BIDI read memory located at | |
a1d8b49a | 2310 | * cmd->t_mem_bidi_list |
c66ac9db NB |
2311 | */ |
2312 | ||
2313 | offset = 0; | |
ec98f782 AG |
2314 | for_each_sg(cmd->t_bidi_data_sg, sg, cmd->t_bidi_data_nents, count) { |
2315 | addr = kmap_atomic(sg_page(sg), KM_USER0); | |
2316 | if (!addr) | |
c66ac9db NB |
2317 | goto out; |
2318 | ||
ec98f782 AG |
2319 | for (i = 0; i < sg->length; i++) |
2320 | *(addr + sg->offset + i) ^= *(buf + offset + i); | |
c66ac9db | 2321 | |
ec98f782 | 2322 | offset += sg->length; |
c66ac9db NB |
2323 | kunmap_atomic(addr, KM_USER0); |
2324 | } | |
ec98f782 | 2325 | |
c66ac9db NB |
2326 | out: |
2327 | kfree(buf); | |
2328 | } | |
2329 | ||
2330 | /* | |
2331 | * Used to obtain Sense Data from underlying Linux/SCSI struct scsi_cmnd | |
2332 | */ | |
2333 | static int transport_get_sense_data(struct se_cmd *cmd) | |
2334 | { | |
2335 | unsigned char *buffer = cmd->sense_buffer, *sense_buffer = NULL; | |
42bf829e | 2336 | struct se_device *dev = cmd->se_dev; |
c66ac9db NB |
2337 | struct se_task *task = NULL, *task_tmp; |
2338 | unsigned long flags; | |
2339 | u32 offset = 0; | |
2340 | ||
e3d6f909 AG |
2341 | WARN_ON(!cmd->se_lun); |
2342 | ||
42bf829e CH |
2343 | if (!dev) |
2344 | return 0; | |
2345 | ||
a1d8b49a | 2346 | spin_lock_irqsave(&cmd->t_state_lock, flags); |
c66ac9db | 2347 | if (cmd->se_cmd_flags & SCF_SENT_CHECK_CONDITION) { |
a1d8b49a | 2348 | spin_unlock_irqrestore(&cmd->t_state_lock, flags); |
c66ac9db NB |
2349 | return 0; |
2350 | } | |
2351 | ||
2352 | list_for_each_entry_safe(task, task_tmp, | |
a1d8b49a | 2353 | &cmd->t_task_list, t_list) { |
c66ac9db NB |
2354 | if (!task->task_sense) |
2355 | continue; | |
2356 | ||
e3d6f909 | 2357 | if (!dev->transport->get_sense_buffer) { |
6708bb27 | 2358 | pr_err("dev->transport->get_sense_buffer" |
c66ac9db NB |
2359 | " is NULL\n"); |
2360 | continue; | |
2361 | } | |
2362 | ||
e3d6f909 | 2363 | sense_buffer = dev->transport->get_sense_buffer(task); |
6708bb27 | 2364 | if (!sense_buffer) { |
04629b7b | 2365 | pr_err("ITT[0x%08x]_TASK[%p]: Unable to locate" |
c66ac9db | 2366 | " sense buffer for task with sense\n", |
04629b7b | 2367 | cmd->se_tfo->get_task_tag(cmd), task); |
c66ac9db NB |
2368 | continue; |
2369 | } | |
a1d8b49a | 2370 | spin_unlock_irqrestore(&cmd->t_state_lock, flags); |
c66ac9db | 2371 | |
e3d6f909 | 2372 | offset = cmd->se_tfo->set_fabric_sense_len(cmd, |
c66ac9db NB |
2373 | TRANSPORT_SENSE_BUFFER); |
2374 | ||
5951146d | 2375 | memcpy(&buffer[offset], sense_buffer, |
c66ac9db NB |
2376 | TRANSPORT_SENSE_BUFFER); |
2377 | cmd->scsi_status = task->task_scsi_status; | |
2378 | /* Automatically padded */ | |
2379 | cmd->scsi_sense_length = | |
2380 | (TRANSPORT_SENSE_BUFFER + offset); | |
2381 | ||
6708bb27 | 2382 | pr_debug("HBA_[%u]_PLUG[%s]: Set SAM STATUS: 0x%02x" |
c66ac9db | 2383 | " and sense\n", |
e3d6f909 | 2384 | dev->se_hba->hba_id, dev->transport->name, |
c66ac9db NB |
2385 | cmd->scsi_status); |
2386 | return 0; | |
2387 | } | |
a1d8b49a | 2388 | spin_unlock_irqrestore(&cmd->t_state_lock, flags); |
c66ac9db NB |
2389 | |
2390 | return -1; | |
2391 | } | |
2392 | ||
ec98f782 AG |
2393 | static inline long long transport_dev_end_lba(struct se_device *dev) |
2394 | { | |
2395 | return dev->transport->get_blocks(dev) + 1; | |
2396 | } | |
2397 | ||
2398 | static int transport_cmd_get_valid_sectors(struct se_cmd *cmd) | |
2399 | { | |
2400 | struct se_device *dev = cmd->se_dev; | |
2401 | u32 sectors; | |
2402 | ||
2403 | if (dev->transport->get_device_type(dev) != TYPE_DISK) | |
2404 | return 0; | |
2405 | ||
2406 | sectors = (cmd->data_length / dev->se_sub_dev->se_dev_attrib.block_size); | |
2407 | ||
6708bb27 AG |
2408 | if ((cmd->t_task_lba + sectors) > transport_dev_end_lba(dev)) { |
2409 | pr_err("LBA: %llu Sectors: %u exceeds" | |
ec98f782 AG |
2410 | " transport_dev_end_lba(): %llu\n", |
2411 | cmd->t_task_lba, sectors, | |
2412 | transport_dev_end_lba(dev)); | |
7abbe7f3 | 2413 | return -EINVAL; |
ec98f782 AG |
2414 | } |
2415 | ||
7abbe7f3 | 2416 | return 0; |
ec98f782 AG |
2417 | } |
2418 | ||
706d5860 NB |
2419 | static int target_check_write_same_discard(unsigned char *flags, struct se_device *dev) |
2420 | { | |
2421 | /* | |
2422 | * Determine if the received WRITE_SAME is used to for direct | |
2423 | * passthrough into Linux/SCSI with struct request via TCM/pSCSI | |
2424 | * or we are signaling the use of internal WRITE_SAME + UNMAP=1 | |
2425 | * emulation for -> Linux/BLOCK disbard with TCM/IBLOCK code. | |
2426 | */ | |
2427 | int passthrough = (dev->transport->transport_type == | |
2428 | TRANSPORT_PLUGIN_PHBA_PDEV); | |
2429 | ||
2430 | if (!passthrough) { | |
2431 | if ((flags[0] & 0x04) || (flags[0] & 0x02)) { | |
2432 | pr_err("WRITE_SAME PBDATA and LBDATA" | |
2433 | " bits not supported for Block Discard" | |
2434 | " Emulation\n"); | |
2435 | return -ENOSYS; | |
2436 | } | |
2437 | /* | |
2438 | * Currently for the emulated case we only accept | |
2439 | * tpws with the UNMAP=1 bit set. | |
2440 | */ | |
2441 | if (!(flags[0] & 0x08)) { | |
2442 | pr_err("WRITE_SAME w/o UNMAP bit not" | |
2443 | " supported for Block Discard Emulation\n"); | |
2444 | return -ENOSYS; | |
2445 | } | |
2446 | } | |
2447 | ||
2448 | return 0; | |
2449 | } | |
2450 | ||
c66ac9db NB |
2451 | /* transport_generic_cmd_sequencer(): |
2452 | * | |
2453 | * Generic Command Sequencer that should work for most DAS transport | |
2454 | * drivers. | |
2455 | * | |
2456 | * Called from transport_generic_allocate_tasks() in the $FABRIC_MOD | |
2457 | * RX Thread. | |
2458 | * | |
2459 | * FIXME: Need to support other SCSI OPCODES where as well. | |
2460 | */ | |
2461 | static int transport_generic_cmd_sequencer( | |
2462 | struct se_cmd *cmd, | |
2463 | unsigned char *cdb) | |
2464 | { | |
5951146d | 2465 | struct se_device *dev = cmd->se_dev; |
c66ac9db NB |
2466 | struct se_subsystem_dev *su_dev = dev->se_sub_dev; |
2467 | int ret = 0, sector_ret = 0, passthrough; | |
2468 | u32 sectors = 0, size = 0, pr_reg_type = 0; | |
2469 | u16 service_action; | |
2470 | u8 alua_ascq = 0; | |
2471 | /* | |
2472 | * Check for an existing UNIT ATTENTION condition | |
2473 | */ | |
2474 | if (core_scsi3_ua_check(cmd, cdb) < 0) { | |
c66ac9db NB |
2475 | cmd->se_cmd_flags |= SCF_SCSI_CDB_EXCEPTION; |
2476 | cmd->scsi_sense_reason = TCM_CHECK_CONDITION_UNIT_ATTENTION; | |
5951146d | 2477 | return -EINVAL; |
c66ac9db NB |
2478 | } |
2479 | /* | |
2480 | * Check status of Asymmetric Logical Unit Assignment port | |
2481 | */ | |
e3d6f909 | 2482 | ret = su_dev->t10_alua.alua_state_check(cmd, cdb, &alua_ascq); |
c66ac9db | 2483 | if (ret != 0) { |
c66ac9db | 2484 | /* |
25985edc | 2485 | * Set SCSI additional sense code (ASC) to 'LUN Not Accessible'; |
c66ac9db NB |
2486 | * The ALUA additional sense code qualifier (ASCQ) is determined |
2487 | * by the ALUA primary or secondary access state.. | |
2488 | */ | |
2489 | if (ret > 0) { | |
2490 | #if 0 | |
6708bb27 | 2491 | pr_debug("[%s]: ALUA TG Port not available," |
c66ac9db | 2492 | " SenseKey: NOT_READY, ASC/ASCQ: 0x04/0x%02x\n", |
e3d6f909 | 2493 | cmd->se_tfo->get_fabric_name(), alua_ascq); |
c66ac9db NB |
2494 | #endif |
2495 | transport_set_sense_codes(cmd, 0x04, alua_ascq); | |
2496 | cmd->se_cmd_flags |= SCF_SCSI_CDB_EXCEPTION; | |
2497 | cmd->scsi_sense_reason = TCM_CHECK_CONDITION_NOT_READY; | |
5951146d | 2498 | return -EINVAL; |
c66ac9db NB |
2499 | } |
2500 | goto out_invalid_cdb_field; | |
2501 | } | |
2502 | /* | |
2503 | * Check status for SPC-3 Persistent Reservations | |
2504 | */ | |
e3d6f909 AG |
2505 | if (su_dev->t10_pr.pr_ops.t10_reservation_check(cmd, &pr_reg_type) != 0) { |
2506 | if (su_dev->t10_pr.pr_ops.t10_seq_non_holder( | |
03e98c9e NB |
2507 | cmd, cdb, pr_reg_type) != 0) { |
2508 | cmd->se_cmd_flags |= SCF_SCSI_CDB_EXCEPTION; | |
2509 | cmd->se_cmd_flags |= SCF_SCSI_RESERVATION_CONFLICT; | |
2510 | cmd->scsi_sense_reason = TCM_RESERVATION_CONFLICT; | |
2511 | return -EBUSY; | |
2512 | } | |
c66ac9db NB |
2513 | /* |
2514 | * This means the CDB is allowed for the SCSI Initiator port | |
2515 | * when said port is *NOT* holding the legacy SPC-2 or | |
2516 | * SPC-3 Persistent Reservation. | |
2517 | */ | |
2518 | } | |
2519 | ||
5bda90c8 CH |
2520 | /* |
2521 | * If we operate in passthrough mode we skip most CDB emulation and | |
2522 | * instead hand the commands down to the physical SCSI device. | |
2523 | */ | |
2524 | passthrough = | |
2525 | (dev->transport->transport_type == TRANSPORT_PLUGIN_PHBA_PDEV); | |
2526 | ||
c66ac9db NB |
2527 | switch (cdb[0]) { |
2528 | case READ_6: | |
2529 | sectors = transport_get_sectors_6(cdb, cmd, §or_ret); | |
2530 | if (sector_ret) | |
2531 | goto out_unsupported_cdb; | |
2532 | size = transport_get_size(sectors, cdb, cmd); | |
a1d8b49a | 2533 | cmd->t_task_lba = transport_lba_21(cdb); |
c66ac9db NB |
2534 | cmd->se_cmd_flags |= SCF_SCSI_DATA_SG_IO_CDB; |
2535 | break; | |
2536 | case READ_10: | |
2537 | sectors = transport_get_sectors_10(cdb, cmd, §or_ret); | |
2538 | if (sector_ret) | |
2539 | goto out_unsupported_cdb; | |
2540 | size = transport_get_size(sectors, cdb, cmd); | |
a1d8b49a | 2541 | cmd->t_task_lba = transport_lba_32(cdb); |
c66ac9db NB |
2542 | cmd->se_cmd_flags |= SCF_SCSI_DATA_SG_IO_CDB; |
2543 | break; | |
2544 | case READ_12: | |
2545 | sectors = transport_get_sectors_12(cdb, cmd, §or_ret); | |
2546 | if (sector_ret) | |
2547 | goto out_unsupported_cdb; | |
2548 | size = transport_get_size(sectors, cdb, cmd); | |
a1d8b49a | 2549 | cmd->t_task_lba = transport_lba_32(cdb); |
c66ac9db NB |
2550 | cmd->se_cmd_flags |= SCF_SCSI_DATA_SG_IO_CDB; |
2551 | break; | |
2552 | case READ_16: | |
2553 | sectors = transport_get_sectors_16(cdb, cmd, §or_ret); | |
2554 | if (sector_ret) | |
2555 | goto out_unsupported_cdb; | |
2556 | size = transport_get_size(sectors, cdb, cmd); | |
a1d8b49a | 2557 | cmd->t_task_lba = transport_lba_64(cdb); |
c66ac9db NB |
2558 | cmd->se_cmd_flags |= SCF_SCSI_DATA_SG_IO_CDB; |
2559 | break; | |
2560 | case WRITE_6: | |
2561 | sectors = transport_get_sectors_6(cdb, cmd, §or_ret); | |
2562 | if (sector_ret) | |
2563 | goto out_unsupported_cdb; | |
2564 | size = transport_get_size(sectors, cdb, cmd); | |
a1d8b49a | 2565 | cmd->t_task_lba = transport_lba_21(cdb); |
c66ac9db NB |
2566 | cmd->se_cmd_flags |= SCF_SCSI_DATA_SG_IO_CDB; |
2567 | break; | |
2568 | case WRITE_10: | |
2569 | sectors = transport_get_sectors_10(cdb, cmd, §or_ret); | |
2570 | if (sector_ret) | |
2571 | goto out_unsupported_cdb; | |
2572 | size = transport_get_size(sectors, cdb, cmd); | |
a1d8b49a | 2573 | cmd->t_task_lba = transport_lba_32(cdb); |
2d3a4b51 CH |
2574 | if (cdb[1] & 0x8) |
2575 | cmd->se_cmd_flags |= SCF_FUA; | |
c66ac9db NB |
2576 | cmd->se_cmd_flags |= SCF_SCSI_DATA_SG_IO_CDB; |
2577 | break; | |
2578 | case WRITE_12: | |
2579 | sectors = transport_get_sectors_12(cdb, cmd, §or_ret); | |
2580 | if (sector_ret) | |
2581 | goto out_unsupported_cdb; | |
2582 | size = transport_get_size(sectors, cdb, cmd); | |
a1d8b49a | 2583 | cmd->t_task_lba = transport_lba_32(cdb); |
2d3a4b51 CH |
2584 | if (cdb[1] & 0x8) |
2585 | cmd->se_cmd_flags |= SCF_FUA; | |
c66ac9db NB |
2586 | cmd->se_cmd_flags |= SCF_SCSI_DATA_SG_IO_CDB; |
2587 | break; | |
2588 | case WRITE_16: | |
2589 | sectors = transport_get_sectors_16(cdb, cmd, §or_ret); | |
2590 | if (sector_ret) | |
2591 | goto out_unsupported_cdb; | |
2592 | size = transport_get_size(sectors, cdb, cmd); | |
a1d8b49a | 2593 | cmd->t_task_lba = transport_lba_64(cdb); |
2d3a4b51 CH |
2594 | if (cdb[1] & 0x8) |
2595 | cmd->se_cmd_flags |= SCF_FUA; | |
c66ac9db NB |
2596 | cmd->se_cmd_flags |= SCF_SCSI_DATA_SG_IO_CDB; |
2597 | break; | |
2598 | case XDWRITEREAD_10: | |
2599 | if ((cmd->data_direction != DMA_TO_DEVICE) || | |
33c3fafc | 2600 | !(cmd->se_cmd_flags & SCF_BIDI)) |
c66ac9db NB |
2601 | goto out_invalid_cdb_field; |
2602 | sectors = transport_get_sectors_10(cdb, cmd, §or_ret); | |
2603 | if (sector_ret) | |
2604 | goto out_unsupported_cdb; | |
2605 | size = transport_get_size(sectors, cdb, cmd); | |
a1d8b49a | 2606 | cmd->t_task_lba = transport_lba_32(cdb); |
c66ac9db | 2607 | cmd->se_cmd_flags |= SCF_SCSI_DATA_SG_IO_CDB; |
7c1c6af3 | 2608 | |
5bda90c8 CH |
2609 | /* |
2610 | * Do now allow BIDI commands for passthrough mode. | |
2611 | */ | |
2612 | if (passthrough) | |
7c1c6af3 | 2613 | goto out_unsupported_cdb; |
5bda90c8 | 2614 | |
c66ac9db | 2615 | /* |
35e0e757 | 2616 | * Setup BIDI XOR callback to be run after I/O completion. |
c66ac9db NB |
2617 | */ |
2618 | cmd->transport_complete_callback = &transport_xor_callback; | |
2d3a4b51 CH |
2619 | if (cdb[1] & 0x8) |
2620 | cmd->se_cmd_flags |= SCF_FUA; | |
c66ac9db NB |
2621 | break; |
2622 | case VARIABLE_LENGTH_CMD: | |
2623 | service_action = get_unaligned_be16(&cdb[8]); | |
c66ac9db NB |
2624 | switch (service_action) { |
2625 | case XDWRITEREAD_32: | |
2626 | sectors = transport_get_sectors_32(cdb, cmd, §or_ret); | |
2627 | if (sector_ret) | |
2628 | goto out_unsupported_cdb; | |
2629 | size = transport_get_size(sectors, cdb, cmd); | |
2630 | /* | |
2631 | * Use WRITE_32 and READ_32 opcodes for the emulated | |
2632 | * XDWRITE_READ_32 logic. | |
2633 | */ | |
a1d8b49a | 2634 | cmd->t_task_lba = transport_lba_64_ext(cdb); |
c66ac9db NB |
2635 | cmd->se_cmd_flags |= SCF_SCSI_DATA_SG_IO_CDB; |
2636 | ||
5bda90c8 CH |
2637 | /* |
2638 | * Do now allow BIDI commands for passthrough mode. | |
2639 | */ | |
c66ac9db | 2640 | if (passthrough) |
7c1c6af3 | 2641 | goto out_unsupported_cdb; |
5bda90c8 | 2642 | |
c66ac9db | 2643 | /* |
35e0e757 CH |
2644 | * Setup BIDI XOR callback to be run during after I/O |
2645 | * completion. | |
c66ac9db NB |
2646 | */ |
2647 | cmd->transport_complete_callback = &transport_xor_callback; | |
2d3a4b51 CH |
2648 | if (cdb[1] & 0x8) |
2649 | cmd->se_cmd_flags |= SCF_FUA; | |
c66ac9db NB |
2650 | break; |
2651 | case WRITE_SAME_32: | |
2652 | sectors = transport_get_sectors_32(cdb, cmd, §or_ret); | |
2653 | if (sector_ret) | |
2654 | goto out_unsupported_cdb; | |
dd3a5ad8 | 2655 | |
6708bb27 | 2656 | if (sectors) |
12850626 | 2657 | size = transport_get_size(1, cdb, cmd); |
6708bb27 AG |
2658 | else { |
2659 | pr_err("WSNZ=1, WRITE_SAME w/sectors=0 not" | |
2660 | " supported\n"); | |
2661 | goto out_invalid_cdb_field; | |
2662 | } | |
dd3a5ad8 | 2663 | |
a1d8b49a | 2664 | cmd->t_task_lba = get_unaligned_be64(&cdb[12]); |
c66ac9db NB |
2665 | cmd->se_cmd_flags |= SCF_SCSI_CONTROL_SG_IO_CDB; |
2666 | ||
706d5860 | 2667 | if (target_check_write_same_discard(&cdb[10], dev) < 0) |
c66ac9db | 2668 | goto out_invalid_cdb_field; |
5bda90c8 CH |
2669 | if (!passthrough) |
2670 | cmd->execute_task = target_emulate_write_same; | |
c66ac9db NB |
2671 | break; |
2672 | default: | |
6708bb27 | 2673 | pr_err("VARIABLE_LENGTH_CMD service action" |
c66ac9db NB |
2674 | " 0x%04x not supported\n", service_action); |
2675 | goto out_unsupported_cdb; | |
2676 | } | |
2677 | break; | |
e434f1f1 | 2678 | case MAINTENANCE_IN: |
e3d6f909 | 2679 | if (dev->transport->get_device_type(dev) != TYPE_ROM) { |
c66ac9db NB |
2680 | /* MAINTENANCE_IN from SCC-2 */ |
2681 | /* | |
2682 | * Check for emulated MI_REPORT_TARGET_PGS. | |
2683 | */ | |
e76a35d6 CH |
2684 | if (cdb[1] == MI_REPORT_TARGET_PGS && |
2685 | su_dev->t10_alua.alua_type == SPC3_ALUA_EMULATED) { | |
2686 | cmd->execute_task = | |
2687 | target_emulate_report_target_port_groups; | |
c66ac9db NB |
2688 | } |
2689 | size = (cdb[6] << 24) | (cdb[7] << 16) | | |
2690 | (cdb[8] << 8) | cdb[9]; | |
2691 | } else { | |
2692 | /* GPCMD_SEND_KEY from multi media commands */ | |
2693 | size = (cdb[8] << 8) + cdb[9]; | |
2694 | } | |
05d1c7c0 | 2695 | cmd->se_cmd_flags |= SCF_SCSI_CONTROL_SG_IO_CDB; |
c66ac9db NB |
2696 | break; |
2697 | case MODE_SELECT: | |
2698 | size = cdb[4]; | |
2699 | cmd->se_cmd_flags |= SCF_SCSI_CONTROL_SG_IO_CDB; | |
2700 | break; | |
2701 | case MODE_SELECT_10: | |
2702 | size = (cdb[7] << 8) + cdb[8]; | |
2703 | cmd->se_cmd_flags |= SCF_SCSI_CONTROL_SG_IO_CDB; | |
2704 | break; | |
2705 | case MODE_SENSE: | |
2706 | size = cdb[4]; | |
05d1c7c0 | 2707 | cmd->se_cmd_flags |= SCF_SCSI_CONTROL_SG_IO_CDB; |
5bda90c8 CH |
2708 | if (!passthrough) |
2709 | cmd->execute_task = target_emulate_modesense; | |
c66ac9db NB |
2710 | break; |
2711 | case MODE_SENSE_10: | |
5bda90c8 CH |
2712 | size = (cdb[7] << 8) + cdb[8]; |
2713 | cmd->se_cmd_flags |= SCF_SCSI_CONTROL_SG_IO_CDB; | |
2714 | if (!passthrough) | |
2715 | cmd->execute_task = target_emulate_modesense; | |
2716 | break; | |
c66ac9db NB |
2717 | case GPCMD_READ_BUFFER_CAPACITY: |
2718 | case GPCMD_SEND_OPC: | |
2719 | case LOG_SELECT: | |
2720 | case LOG_SENSE: | |
2721 | size = (cdb[7] << 8) + cdb[8]; | |
05d1c7c0 | 2722 | cmd->se_cmd_flags |= SCF_SCSI_CONTROL_SG_IO_CDB; |
c66ac9db NB |
2723 | break; |
2724 | case READ_BLOCK_LIMITS: | |
2725 | size = READ_BLOCK_LEN; | |
05d1c7c0 | 2726 | cmd->se_cmd_flags |= SCF_SCSI_CONTROL_SG_IO_CDB; |
c66ac9db NB |
2727 | break; |
2728 | case GPCMD_GET_CONFIGURATION: | |
2729 | case GPCMD_READ_FORMAT_CAPACITIES: | |
2730 | case GPCMD_READ_DISC_INFO: | |
2731 | case GPCMD_READ_TRACK_RZONE_INFO: | |
2732 | size = (cdb[7] << 8) + cdb[8]; | |
2733 | cmd->se_cmd_flags |= SCF_SCSI_CONTROL_SG_IO_CDB; | |
2734 | break; | |
2735 | case PERSISTENT_RESERVE_IN: | |
617c0e06 | 2736 | if (su_dev->t10_pr.res_type == SPC3_PERSISTENT_RESERVATIONS) |
e76a35d6 | 2737 | cmd->execute_task = target_scsi3_emulate_pr_in; |
617c0e06 CH |
2738 | size = (cdb[7] << 8) + cdb[8]; |
2739 | cmd->se_cmd_flags |= SCF_SCSI_CONTROL_SG_IO_CDB; | |
2740 | break; | |
c66ac9db | 2741 | case PERSISTENT_RESERVE_OUT: |
617c0e06 | 2742 | if (su_dev->t10_pr.res_type == SPC3_PERSISTENT_RESERVATIONS) |
e76a35d6 | 2743 | cmd->execute_task = target_scsi3_emulate_pr_out; |
c66ac9db | 2744 | size = (cdb[7] << 8) + cdb[8]; |
05d1c7c0 | 2745 | cmd->se_cmd_flags |= SCF_SCSI_CONTROL_SG_IO_CDB; |
c66ac9db NB |
2746 | break; |
2747 | case GPCMD_MECHANISM_STATUS: | |
2748 | case GPCMD_READ_DVD_STRUCTURE: | |
2749 | size = (cdb[8] << 8) + cdb[9]; | |
2750 | cmd->se_cmd_flags |= SCF_SCSI_CONTROL_SG_IO_CDB; | |
2751 | break; | |
2752 | case READ_POSITION: | |
2753 | size = READ_POSITION_LEN; | |
05d1c7c0 | 2754 | cmd->se_cmd_flags |= SCF_SCSI_CONTROL_SG_IO_CDB; |
c66ac9db | 2755 | break; |
e434f1f1 | 2756 | case MAINTENANCE_OUT: |
e3d6f909 | 2757 | if (dev->transport->get_device_type(dev) != TYPE_ROM) { |
c66ac9db NB |
2758 | /* MAINTENANCE_OUT from SCC-2 |
2759 | * | |
2760 | * Check for emulated MO_SET_TARGET_PGS. | |
2761 | */ | |
e76a35d6 CH |
2762 | if (cdb[1] == MO_SET_TARGET_PGS && |
2763 | su_dev->t10_alua.alua_type == SPC3_ALUA_EMULATED) { | |
2764 | cmd->execute_task = | |
2765 | target_emulate_set_target_port_groups; | |
c66ac9db NB |
2766 | } |
2767 | ||
2768 | size = (cdb[6] << 24) | (cdb[7] << 16) | | |
2769 | (cdb[8] << 8) | cdb[9]; | |
2770 | } else { | |
2771 | /* GPCMD_REPORT_KEY from multi media commands */ | |
2772 | size = (cdb[8] << 8) + cdb[9]; | |
2773 | } | |
05d1c7c0 | 2774 | cmd->se_cmd_flags |= SCF_SCSI_CONTROL_SG_IO_CDB; |
c66ac9db NB |
2775 | break; |
2776 | case INQUIRY: | |
2777 | size = (cdb[3] << 8) + cdb[4]; | |
2778 | /* | |
2779 | * Do implict HEAD_OF_QUEUE processing for INQUIRY. | |
2780 | * See spc4r17 section 5.3 | |
2781 | */ | |
5951146d | 2782 | if (cmd->se_dev->dev_task_attr_type == SAM_TASK_ATTR_EMULATED) |
e66ecd50 | 2783 | cmd->sam_task_attr = MSG_HEAD_TAG; |
05d1c7c0 | 2784 | cmd->se_cmd_flags |= SCF_SCSI_CONTROL_SG_IO_CDB; |
5bda90c8 CH |
2785 | if (!passthrough) |
2786 | cmd->execute_task = target_emulate_inquiry; | |
c66ac9db NB |
2787 | break; |
2788 | case READ_BUFFER: | |
2789 | size = (cdb[6] << 16) + (cdb[7] << 8) + cdb[8]; | |
05d1c7c0 | 2790 | cmd->se_cmd_flags |= SCF_SCSI_CONTROL_SG_IO_CDB; |
c66ac9db NB |
2791 | break; |
2792 | case READ_CAPACITY: | |
2793 | size = READ_CAP_LEN; | |
05d1c7c0 | 2794 | cmd->se_cmd_flags |= SCF_SCSI_CONTROL_SG_IO_CDB; |
5bda90c8 CH |
2795 | if (!passthrough) |
2796 | cmd->execute_task = target_emulate_readcapacity; | |
c66ac9db NB |
2797 | break; |
2798 | case READ_MEDIA_SERIAL_NUMBER: | |
2799 | case SECURITY_PROTOCOL_IN: | |
2800 | case SECURITY_PROTOCOL_OUT: | |
2801 | size = (cdb[6] << 24) | (cdb[7] << 16) | (cdb[8] << 8) | cdb[9]; | |
05d1c7c0 | 2802 | cmd->se_cmd_flags |= SCF_SCSI_CONTROL_SG_IO_CDB; |
c66ac9db NB |
2803 | break; |
2804 | case SERVICE_ACTION_IN: | |
5bda90c8 CH |
2805 | switch (cmd->t_task_cdb[1] & 0x1f) { |
2806 | case SAI_READ_CAPACITY_16: | |
2807 | if (!passthrough) | |
2808 | cmd->execute_task = | |
2809 | target_emulate_readcapacity_16; | |
2810 | break; | |
2811 | default: | |
2812 | if (passthrough) | |
2813 | break; | |
2814 | ||
2815 | pr_err("Unsupported SA: 0x%02x\n", | |
2816 | cmd->t_task_cdb[1] & 0x1f); | |
2817 | goto out_unsupported_cdb; | |
2818 | } | |
2819 | /*FALLTHROUGH*/ | |
c66ac9db NB |
2820 | case ACCESS_CONTROL_IN: |
2821 | case ACCESS_CONTROL_OUT: | |
2822 | case EXTENDED_COPY: | |
2823 | case READ_ATTRIBUTE: | |
2824 | case RECEIVE_COPY_RESULTS: | |
2825 | case WRITE_ATTRIBUTE: | |
2826 | size = (cdb[10] << 24) | (cdb[11] << 16) | | |
2827 | (cdb[12] << 8) | cdb[13]; | |
05d1c7c0 | 2828 | cmd->se_cmd_flags |= SCF_SCSI_CONTROL_SG_IO_CDB; |
c66ac9db NB |
2829 | break; |
2830 | case RECEIVE_DIAGNOSTIC: | |
2831 | case SEND_DIAGNOSTIC: | |
2832 | size = (cdb[3] << 8) | cdb[4]; | |
05d1c7c0 | 2833 | cmd->se_cmd_flags |= SCF_SCSI_CONTROL_SG_IO_CDB; |
c66ac9db NB |
2834 | break; |
2835 | /* #warning FIXME: Figure out correct GPCMD_READ_CD blocksize. */ | |
2836 | #if 0 | |
2837 | case GPCMD_READ_CD: | |
2838 | sectors = (cdb[6] << 16) + (cdb[7] << 8) + cdb[8]; | |
2839 | size = (2336 * sectors); | |
05d1c7c0 | 2840 | cmd->se_cmd_flags |= SCF_SCSI_CONTROL_SG_IO_CDB; |
c66ac9db NB |
2841 | break; |
2842 | #endif | |
2843 | case READ_TOC: | |
2844 | size = cdb[8]; | |
05d1c7c0 | 2845 | cmd->se_cmd_flags |= SCF_SCSI_CONTROL_SG_IO_CDB; |
c66ac9db NB |
2846 | break; |
2847 | case REQUEST_SENSE: | |
2848 | size = cdb[4]; | |
05d1c7c0 | 2849 | cmd->se_cmd_flags |= SCF_SCSI_CONTROL_SG_IO_CDB; |
5bda90c8 CH |
2850 | if (!passthrough) |
2851 | cmd->execute_task = target_emulate_request_sense; | |
c66ac9db NB |
2852 | break; |
2853 | case READ_ELEMENT_STATUS: | |
2854 | size = 65536 * cdb[7] + 256 * cdb[8] + cdb[9]; | |
05d1c7c0 | 2855 | cmd->se_cmd_flags |= SCF_SCSI_CONTROL_SG_IO_CDB; |
c66ac9db NB |
2856 | break; |
2857 | case WRITE_BUFFER: | |
2858 | size = (cdb[6] << 16) + (cdb[7] << 8) + cdb[8]; | |
05d1c7c0 | 2859 | cmd->se_cmd_flags |= SCF_SCSI_CONTROL_SG_IO_CDB; |
c66ac9db NB |
2860 | break; |
2861 | case RESERVE: | |
2862 | case RESERVE_10: | |
2863 | /* | |
2864 | * The SPC-2 RESERVE does not contain a size in the SCSI CDB. | |
2865 | * Assume the passthrough or $FABRIC_MOD will tell us about it. | |
2866 | */ | |
2867 | if (cdb[0] == RESERVE_10) | |
2868 | size = (cdb[7] << 8) | cdb[8]; | |
2869 | else | |
2870 | size = cmd->data_length; | |
2871 | ||
2872 | /* | |
2873 | * Setup the legacy emulated handler for SPC-2 and | |
2874 | * >= SPC-3 compatible reservation handling (CRH=1) | |
2875 | * Otherwise, we assume the underlying SCSI logic is | |
2876 | * is running in SPC_PASSTHROUGH, and wants reservations | |
2877 | * emulation disabled. | |
2878 | */ | |
e76a35d6 CH |
2879 | if (su_dev->t10_pr.res_type != SPC_PASSTHROUGH) |
2880 | cmd->execute_task = target_scsi2_reservation_reserve; | |
c66ac9db NB |
2881 | cmd->se_cmd_flags |= SCF_SCSI_NON_DATA_CDB; |
2882 | break; | |
2883 | case RELEASE: | |
2884 | case RELEASE_10: | |
2885 | /* | |
2886 | * The SPC-2 RELEASE does not contain a size in the SCSI CDB. | |
2887 | * Assume the passthrough or $FABRIC_MOD will tell us about it. | |
2888 | */ | |
2889 | if (cdb[0] == RELEASE_10) | |
2890 | size = (cdb[7] << 8) | cdb[8]; | |
2891 | else | |
2892 | size = cmd->data_length; | |
2893 | ||
e76a35d6 CH |
2894 | if (su_dev->t10_pr.res_type != SPC_PASSTHROUGH) |
2895 | cmd->execute_task = target_scsi2_reservation_release; | |
c66ac9db NB |
2896 | cmd->se_cmd_flags |= SCF_SCSI_NON_DATA_CDB; |
2897 | break; | |
2898 | case SYNCHRONIZE_CACHE: | |
2899 | case 0x91: /* SYNCHRONIZE_CACHE_16: */ | |
2900 | /* | |
2901 | * Extract LBA and range to be flushed for emulated SYNCHRONIZE_CACHE | |
2902 | */ | |
2903 | if (cdb[0] == SYNCHRONIZE_CACHE) { | |
2904 | sectors = transport_get_sectors_10(cdb, cmd, §or_ret); | |
a1d8b49a | 2905 | cmd->t_task_lba = transport_lba_32(cdb); |
c66ac9db NB |
2906 | } else { |
2907 | sectors = transport_get_sectors_16(cdb, cmd, §or_ret); | |
a1d8b49a | 2908 | cmd->t_task_lba = transport_lba_64(cdb); |
c66ac9db NB |
2909 | } |
2910 | if (sector_ret) | |
2911 | goto out_unsupported_cdb; | |
2912 | ||
2913 | size = transport_get_size(sectors, cdb, cmd); | |
2914 | cmd->se_cmd_flags |= SCF_SCSI_NON_DATA_CDB; | |
2915 | ||
5bda90c8 | 2916 | if (passthrough) |
c66ac9db | 2917 | break; |
5bda90c8 | 2918 | |
c66ac9db NB |
2919 | /* |
2920 | * Check to ensure that LBA + Range does not exceed past end of | |
7abbe7f3 | 2921 | * device for IBLOCK and FILEIO ->do_sync_cache() backend calls |
c66ac9db | 2922 | */ |
7abbe7f3 NB |
2923 | if ((cmd->t_task_lba != 0) || (sectors != 0)) { |
2924 | if (transport_cmd_get_valid_sectors(cmd) < 0) | |
2925 | goto out_invalid_cdb_field; | |
2926 | } | |
5bda90c8 | 2927 | cmd->execute_task = target_emulate_synchronize_cache; |
c66ac9db NB |
2928 | break; |
2929 | case UNMAP: | |
2930 | size = get_unaligned_be16(&cdb[7]); | |
05d1c7c0 | 2931 | cmd->se_cmd_flags |= SCF_SCSI_CONTROL_SG_IO_CDB; |
5bda90c8 CH |
2932 | if (!passthrough) |
2933 | cmd->execute_task = target_emulate_unmap; | |
c66ac9db NB |
2934 | break; |
2935 | case WRITE_SAME_16: | |
2936 | sectors = transport_get_sectors_16(cdb, cmd, §or_ret); | |
2937 | if (sector_ret) | |
2938 | goto out_unsupported_cdb; | |
dd3a5ad8 | 2939 | |
6708bb27 | 2940 | if (sectors) |
12850626 | 2941 | size = transport_get_size(1, cdb, cmd); |
6708bb27 AG |
2942 | else { |
2943 | pr_err("WSNZ=1, WRITE_SAME w/sectors=0 not supported\n"); | |
2944 | goto out_invalid_cdb_field; | |
2945 | } | |
dd3a5ad8 | 2946 | |
5db0753b | 2947 | cmd->t_task_lba = get_unaligned_be64(&cdb[2]); |
706d5860 NB |
2948 | cmd->se_cmd_flags |= SCF_SCSI_CONTROL_SG_IO_CDB; |
2949 | ||
2950 | if (target_check_write_same_discard(&cdb[1], dev) < 0) | |
2951 | goto out_invalid_cdb_field; | |
5bda90c8 CH |
2952 | if (!passthrough) |
2953 | cmd->execute_task = target_emulate_write_same; | |
706d5860 NB |
2954 | break; |
2955 | case WRITE_SAME: | |
2956 | sectors = transport_get_sectors_10(cdb, cmd, §or_ret); | |
2957 | if (sector_ret) | |
2958 | goto out_unsupported_cdb; | |
2959 | ||
2960 | if (sectors) | |
12850626 | 2961 | size = transport_get_size(1, cdb, cmd); |
706d5860 NB |
2962 | else { |
2963 | pr_err("WSNZ=1, WRITE_SAME w/sectors=0 not supported\n"); | |
2964 | goto out_invalid_cdb_field; | |
c66ac9db | 2965 | } |
706d5860 NB |
2966 | |
2967 | cmd->t_task_lba = get_unaligned_be32(&cdb[2]); | |
c66ac9db | 2968 | cmd->se_cmd_flags |= SCF_SCSI_CONTROL_SG_IO_CDB; |
706d5860 NB |
2969 | /* |
2970 | * Follow sbcr26 with WRITE_SAME (10) and check for the existence | |
2971 | * of byte 1 bit 3 UNMAP instead of original reserved field | |
2972 | */ | |
2973 | if (target_check_write_same_discard(&cdb[1], dev) < 0) | |
2974 | goto out_invalid_cdb_field; | |
5bda90c8 CH |
2975 | if (!passthrough) |
2976 | cmd->execute_task = target_emulate_write_same; | |
c66ac9db NB |
2977 | break; |
2978 | case ALLOW_MEDIUM_REMOVAL: | |
c66ac9db | 2979 | case ERASE: |
c66ac9db NB |
2980 | case REZERO_UNIT: |
2981 | case SEEK_10: | |
c66ac9db NB |
2982 | case SPACE: |
2983 | case START_STOP: | |
2984 | case TEST_UNIT_READY: | |
2985 | case VERIFY: | |
2986 | case WRITE_FILEMARKS: | |
5bda90c8 CH |
2987 | cmd->se_cmd_flags |= SCF_SCSI_NON_DATA_CDB; |
2988 | if (!passthrough) | |
2989 | cmd->execute_task = target_emulate_noop; | |
2990 | break; | |
2991 | case GPCMD_CLOSE_TRACK: | |
2992 | case INITIALIZE_ELEMENT_STATUS: | |
2993 | case GPCMD_LOAD_UNLOAD: | |
2994 | case GPCMD_SET_SPEED: | |
c66ac9db NB |
2995 | case MOVE_MEDIUM: |
2996 | cmd->se_cmd_flags |= SCF_SCSI_NON_DATA_CDB; | |
2997 | break; | |
2998 | case REPORT_LUNS: | |
e76a35d6 | 2999 | cmd->execute_task = target_report_luns; |
c66ac9db NB |
3000 | size = (cdb[6] << 24) | (cdb[7] << 16) | (cdb[8] << 8) | cdb[9]; |
3001 | /* | |
3002 | * Do implict HEAD_OF_QUEUE processing for REPORT_LUNS | |
3003 | * See spc4r17 section 5.3 | |
3004 | */ | |
5951146d | 3005 | if (cmd->se_dev->dev_task_attr_type == SAM_TASK_ATTR_EMULATED) |
e66ecd50 | 3006 | cmd->sam_task_attr = MSG_HEAD_TAG; |
05d1c7c0 | 3007 | cmd->se_cmd_flags |= SCF_SCSI_CONTROL_SG_IO_CDB; |
c66ac9db NB |
3008 | break; |
3009 | default: | |
6708bb27 | 3010 | pr_warn("TARGET_CORE[%s]: Unsupported SCSI Opcode" |
c66ac9db | 3011 | " 0x%02x, sending CHECK_CONDITION.\n", |
e3d6f909 | 3012 | cmd->se_tfo->get_fabric_name(), cdb[0]); |
c66ac9db NB |
3013 | goto out_unsupported_cdb; |
3014 | } | |
3015 | ||
3016 | if (size != cmd->data_length) { | |
6708bb27 | 3017 | pr_warn("TARGET_CORE[%s]: Expected Transfer Length:" |
c66ac9db | 3018 | " %u does not match SCSI CDB Length: %u for SAM Opcode:" |
e3d6f909 | 3019 | " 0x%02x\n", cmd->se_tfo->get_fabric_name(), |
c66ac9db NB |
3020 | cmd->data_length, size, cdb[0]); |
3021 | ||
3022 | cmd->cmd_spdtl = size; | |
3023 | ||
3024 | if (cmd->data_direction == DMA_TO_DEVICE) { | |
6708bb27 | 3025 | pr_err("Rejecting underflow/overflow" |
c66ac9db NB |
3026 | " WRITE data\n"); |
3027 | goto out_invalid_cdb_field; | |
3028 | } | |
3029 | /* | |
3030 | * Reject READ_* or WRITE_* with overflow/underflow for | |
3031 | * type SCF_SCSI_DATA_SG_IO_CDB. | |
3032 | */ | |
6708bb27 AG |
3033 | if (!ret && (dev->se_sub_dev->se_dev_attrib.block_size != 512)) { |
3034 | pr_err("Failing OVERFLOW/UNDERFLOW for LBA op" | |
c66ac9db | 3035 | " CDB on non 512-byte sector setup subsystem" |
e3d6f909 | 3036 | " plugin: %s\n", dev->transport->name); |
c66ac9db NB |
3037 | /* Returns CHECK_CONDITION + INVALID_CDB_FIELD */ |
3038 | goto out_invalid_cdb_field; | |
3039 | } | |
3040 | ||
3041 | if (size > cmd->data_length) { | |
3042 | cmd->se_cmd_flags |= SCF_OVERFLOW_BIT; | |
3043 | cmd->residual_count = (size - cmd->data_length); | |
3044 | } else { | |
3045 | cmd->se_cmd_flags |= SCF_UNDERFLOW_BIT; | |
3046 | cmd->residual_count = (cmd->data_length - size); | |
3047 | } | |
3048 | cmd->data_length = size; | |
3049 | } | |
3050 | ||
5bda90c8 CH |
3051 | /* reject any command that we don't have a handler for */ |
3052 | if (!(passthrough || cmd->execute_task || | |
3053 | (cmd->se_cmd_flags & SCF_SCSI_DATA_SG_IO_CDB))) | |
3054 | goto out_unsupported_cdb; | |
3055 | ||
d0229ae3 AG |
3056 | /* Let's limit control cdbs to a page, for simplicity's sake. */ |
3057 | if ((cmd->se_cmd_flags & SCF_SCSI_CONTROL_SG_IO_CDB) && | |
3058 | size > PAGE_SIZE) | |
3059 | goto out_invalid_cdb_field; | |
3060 | ||
c66ac9db NB |
3061 | transport_set_supported_SAM_opcode(cmd); |
3062 | return ret; | |
3063 | ||
3064 | out_unsupported_cdb: | |
3065 | cmd->se_cmd_flags |= SCF_SCSI_CDB_EXCEPTION; | |
3066 | cmd->scsi_sense_reason = TCM_UNSUPPORTED_SCSI_OPCODE; | |
5951146d | 3067 | return -EINVAL; |
c66ac9db NB |
3068 | out_invalid_cdb_field: |
3069 | cmd->se_cmd_flags |= SCF_SCSI_CDB_EXCEPTION; | |
3070 | cmd->scsi_sense_reason = TCM_INVALID_CDB_FIELD; | |
5951146d | 3071 | return -EINVAL; |
c66ac9db NB |
3072 | } |
3073 | ||
c66ac9db | 3074 | /* |
35e0e757 | 3075 | * Called from I/O completion to determine which dormant/delayed |
c66ac9db NB |
3076 | * and ordered cmds need to have their tasks added to the execution queue. |
3077 | */ | |
3078 | static void transport_complete_task_attr(struct se_cmd *cmd) | |
3079 | { | |
5951146d | 3080 | struct se_device *dev = cmd->se_dev; |
c66ac9db NB |
3081 | struct se_cmd *cmd_p, *cmd_tmp; |
3082 | int new_active_tasks = 0; | |
3083 | ||
e66ecd50 | 3084 | if (cmd->sam_task_attr == MSG_SIMPLE_TAG) { |
c66ac9db NB |
3085 | atomic_dec(&dev->simple_cmds); |
3086 | smp_mb__after_atomic_dec(); | |
3087 | dev->dev_cur_ordered_id++; | |
6708bb27 | 3088 | pr_debug("Incremented dev->dev_cur_ordered_id: %u for" |
c66ac9db NB |
3089 | " SIMPLE: %u\n", dev->dev_cur_ordered_id, |
3090 | cmd->se_ordered_id); | |
e66ecd50 | 3091 | } else if (cmd->sam_task_attr == MSG_HEAD_TAG) { |
c66ac9db | 3092 | dev->dev_cur_ordered_id++; |
6708bb27 | 3093 | pr_debug("Incremented dev_cur_ordered_id: %u for" |
c66ac9db NB |
3094 | " HEAD_OF_QUEUE: %u\n", dev->dev_cur_ordered_id, |
3095 | cmd->se_ordered_id); | |
e66ecd50 | 3096 | } else if (cmd->sam_task_attr == MSG_ORDERED_TAG) { |
c66ac9db NB |
3097 | atomic_dec(&dev->dev_ordered_sync); |
3098 | smp_mb__after_atomic_dec(); | |
c66ac9db NB |
3099 | |
3100 | dev->dev_cur_ordered_id++; | |
6708bb27 | 3101 | pr_debug("Incremented dev_cur_ordered_id: %u for ORDERED:" |
c66ac9db NB |
3102 | " %u\n", dev->dev_cur_ordered_id, cmd->se_ordered_id); |
3103 | } | |
3104 | /* | |
3105 | * Process all commands up to the last received | |
3106 | * ORDERED task attribute which requires another blocking | |
3107 | * boundary | |
3108 | */ | |
3109 | spin_lock(&dev->delayed_cmd_lock); | |
3110 | list_for_each_entry_safe(cmd_p, cmd_tmp, | |
5951146d | 3111 | &dev->delayed_cmd_list, se_delayed_node) { |
c66ac9db | 3112 | |
5951146d | 3113 | list_del(&cmd_p->se_delayed_node); |
c66ac9db NB |
3114 | spin_unlock(&dev->delayed_cmd_lock); |
3115 | ||
6708bb27 | 3116 | pr_debug("Calling add_tasks() for" |
c66ac9db NB |
3117 | " cmd_p: 0x%02x Task Attr: 0x%02x" |
3118 | " Dormant -> Active, se_ordered_id: %u\n", | |
6708bb27 | 3119 | cmd_p->t_task_cdb[0], |
c66ac9db NB |
3120 | cmd_p->sam_task_attr, cmd_p->se_ordered_id); |
3121 | ||
3122 | transport_add_tasks_from_cmd(cmd_p); | |
3123 | new_active_tasks++; | |
3124 | ||
3125 | spin_lock(&dev->delayed_cmd_lock); | |
e66ecd50 | 3126 | if (cmd_p->sam_task_attr == MSG_ORDERED_TAG) |
c66ac9db NB |
3127 | break; |
3128 | } | |
3129 | spin_unlock(&dev->delayed_cmd_lock); | |
3130 | /* | |
3131 | * If new tasks have become active, wake up the transport thread | |
3132 | * to do the processing of the Active tasks. | |
3133 | */ | |
3134 | if (new_active_tasks != 0) | |
e3d6f909 | 3135 | wake_up_interruptible(&dev->dev_queue_obj.thread_wq); |
c66ac9db NB |
3136 | } |
3137 | ||
e057f533 | 3138 | static void transport_complete_qf(struct se_cmd *cmd) |
07bde79a NB |
3139 | { |
3140 | int ret = 0; | |
3141 | ||
e057f533 CH |
3142 | if (cmd->se_dev->dev_task_attr_type == SAM_TASK_ATTR_EMULATED) |
3143 | transport_complete_task_attr(cmd); | |
3144 | ||
3145 | if (cmd->se_cmd_flags & SCF_TRANSPORT_TASK_SENSE) { | |
3146 | ret = cmd->se_tfo->queue_status(cmd); | |
3147 | if (ret) | |
3148 | goto out; | |
3149 | } | |
07bde79a NB |
3150 | |
3151 | switch (cmd->data_direction) { | |
3152 | case DMA_FROM_DEVICE: | |
3153 | ret = cmd->se_tfo->queue_data_in(cmd); | |
3154 | break; | |
3155 | case DMA_TO_DEVICE: | |
ec98f782 | 3156 | if (cmd->t_bidi_data_sg) { |
07bde79a NB |
3157 | ret = cmd->se_tfo->queue_data_in(cmd); |
3158 | if (ret < 0) | |
e057f533 | 3159 | break; |
07bde79a NB |
3160 | } |
3161 | /* Fall through for DMA_TO_DEVICE */ | |
3162 | case DMA_NONE: | |
3163 | ret = cmd->se_tfo->queue_status(cmd); | |
3164 | break; | |
3165 | default: | |
3166 | break; | |
3167 | } | |
3168 | ||
e057f533 CH |
3169 | out: |
3170 | if (ret < 0) { | |
3171 | transport_handle_queue_full(cmd, cmd->se_dev); | |
3172 | return; | |
3173 | } | |
3174 | transport_lun_remove_cmd(cmd); | |
3175 | transport_cmd_check_stop_to_fabric(cmd); | |
07bde79a NB |
3176 | } |
3177 | ||
3178 | static void transport_handle_queue_full( | |
3179 | struct se_cmd *cmd, | |
e057f533 | 3180 | struct se_device *dev) |
07bde79a NB |
3181 | { |
3182 | spin_lock_irq(&dev->qf_cmd_lock); | |
07bde79a NB |
3183 | list_add_tail(&cmd->se_qf_node, &cmd->se_dev->qf_cmd_list); |
3184 | atomic_inc(&dev->dev_qf_count); | |
3185 | smp_mb__after_atomic_inc(); | |
3186 | spin_unlock_irq(&cmd->se_dev->qf_cmd_lock); | |
3187 | ||
3188 | schedule_work(&cmd->se_dev->qf_work_queue); | |
3189 | } | |
3190 | ||
35e0e757 | 3191 | static void target_complete_ok_work(struct work_struct *work) |
c66ac9db | 3192 | { |
35e0e757 | 3193 | struct se_cmd *cmd = container_of(work, struct se_cmd, work); |
07bde79a | 3194 | int reason = 0, ret; |
35e0e757 | 3195 | |
c66ac9db NB |
3196 | /* |
3197 | * Check if we need to move delayed/dormant tasks from cmds on the | |
3198 | * delayed execution list after a HEAD_OF_QUEUE or ORDERED Task | |
3199 | * Attribute. | |
3200 | */ | |
5951146d | 3201 | if (cmd->se_dev->dev_task_attr_type == SAM_TASK_ATTR_EMULATED) |
c66ac9db | 3202 | transport_complete_task_attr(cmd); |
07bde79a NB |
3203 | /* |
3204 | * Check to schedule QUEUE_FULL work, or execute an existing | |
3205 | * cmd->transport_qf_callback() | |
3206 | */ | |
3207 | if (atomic_read(&cmd->se_dev->dev_qf_count) != 0) | |
3208 | schedule_work(&cmd->se_dev->qf_work_queue); | |
3209 | ||
c66ac9db NB |
3210 | /* |
3211 | * Check if we need to retrieve a sense buffer from | |
3212 | * the struct se_cmd in question. | |
3213 | */ | |
3214 | if (cmd->se_cmd_flags & SCF_TRANSPORT_TASK_SENSE) { | |
3215 | if (transport_get_sense_data(cmd) < 0) | |
3216 | reason = TCM_NON_EXISTENT_LUN; | |
3217 | ||
3218 | /* | |
3219 | * Only set when an struct se_task->task_scsi_status returned | |
3220 | * a non GOOD status. | |
3221 | */ | |
3222 | if (cmd->scsi_status) { | |
07bde79a | 3223 | ret = transport_send_check_condition_and_sense( |
c66ac9db | 3224 | cmd, reason, 1); |
f147abb4 | 3225 | if (ret == -EAGAIN || ret == -ENOMEM) |
07bde79a NB |
3226 | goto queue_full; |
3227 | ||
c66ac9db NB |
3228 | transport_lun_remove_cmd(cmd); |
3229 | transport_cmd_check_stop_to_fabric(cmd); | |
3230 | return; | |
3231 | } | |
3232 | } | |
3233 | /* | |
25985edc | 3234 | * Check for a callback, used by amongst other things |
c66ac9db NB |
3235 | * XDWRITE_READ_10 emulation. |
3236 | */ | |
3237 | if (cmd->transport_complete_callback) | |
3238 | cmd->transport_complete_callback(cmd); | |
3239 | ||
3240 | switch (cmd->data_direction) { | |
3241 | case DMA_FROM_DEVICE: | |
3242 | spin_lock(&cmd->se_lun->lun_sep_lock); | |
e3d6f909 AG |
3243 | if (cmd->se_lun->lun_sep) { |
3244 | cmd->se_lun->lun_sep->sep_stats.tx_data_octets += | |
c66ac9db NB |
3245 | cmd->data_length; |
3246 | } | |
3247 | spin_unlock(&cmd->se_lun->lun_sep_lock); | |
c66ac9db | 3248 | |
07bde79a | 3249 | ret = cmd->se_tfo->queue_data_in(cmd); |
f147abb4 | 3250 | if (ret == -EAGAIN || ret == -ENOMEM) |
07bde79a | 3251 | goto queue_full; |
c66ac9db NB |
3252 | break; |
3253 | case DMA_TO_DEVICE: | |
3254 | spin_lock(&cmd->se_lun->lun_sep_lock); | |
e3d6f909 AG |
3255 | if (cmd->se_lun->lun_sep) { |
3256 | cmd->se_lun->lun_sep->sep_stats.rx_data_octets += | |
c66ac9db NB |
3257 | cmd->data_length; |
3258 | } | |
3259 | spin_unlock(&cmd->se_lun->lun_sep_lock); | |
3260 | /* | |
3261 | * Check if we need to send READ payload for BIDI-COMMAND | |
3262 | */ | |
ec98f782 | 3263 | if (cmd->t_bidi_data_sg) { |
c66ac9db | 3264 | spin_lock(&cmd->se_lun->lun_sep_lock); |
e3d6f909 AG |
3265 | if (cmd->se_lun->lun_sep) { |
3266 | cmd->se_lun->lun_sep->sep_stats.tx_data_octets += | |
c66ac9db NB |
3267 | cmd->data_length; |
3268 | } | |
3269 | spin_unlock(&cmd->se_lun->lun_sep_lock); | |
07bde79a | 3270 | ret = cmd->se_tfo->queue_data_in(cmd); |
f147abb4 | 3271 | if (ret == -EAGAIN || ret == -ENOMEM) |
07bde79a | 3272 | goto queue_full; |
c66ac9db NB |
3273 | break; |
3274 | } | |
3275 | /* Fall through for DMA_TO_DEVICE */ | |
3276 | case DMA_NONE: | |
07bde79a | 3277 | ret = cmd->se_tfo->queue_status(cmd); |
f147abb4 | 3278 | if (ret == -EAGAIN || ret == -ENOMEM) |
07bde79a | 3279 | goto queue_full; |
c66ac9db NB |
3280 | break; |
3281 | default: | |
3282 | break; | |
3283 | } | |
3284 | ||
3285 | transport_lun_remove_cmd(cmd); | |
3286 | transport_cmd_check_stop_to_fabric(cmd); | |
07bde79a NB |
3287 | return; |
3288 | ||
3289 | queue_full: | |
6708bb27 | 3290 | pr_debug("Handling complete_ok QUEUE_FULL: se_cmd: %p," |
07bde79a | 3291 | " data_direction: %d\n", cmd, cmd->data_direction); |
e057f533 CH |
3292 | cmd->t_state = TRANSPORT_COMPLETE_QF_OK; |
3293 | transport_handle_queue_full(cmd, cmd->se_dev); | |
c66ac9db NB |
3294 | } |
3295 | ||
3296 | static void transport_free_dev_tasks(struct se_cmd *cmd) | |
3297 | { | |
3298 | struct se_task *task, *task_tmp; | |
3299 | unsigned long flags; | |
0c2cfe5f | 3300 | LIST_HEAD(dispose_list); |
c66ac9db | 3301 | |
a1d8b49a | 3302 | spin_lock_irqsave(&cmd->t_state_lock, flags); |
c66ac9db | 3303 | list_for_each_entry_safe(task, task_tmp, |
a1d8b49a | 3304 | &cmd->t_task_list, t_list) { |
0c2cfe5f CH |
3305 | if (!(task->task_flags & TF_ACTIVE)) |
3306 | list_move_tail(&task->t_list, &dispose_list); | |
3307 | } | |
3308 | spin_unlock_irqrestore(&cmd->t_state_lock, flags); | |
3309 | ||
3310 | while (!list_empty(&dispose_list)) { | |
3311 | task = list_first_entry(&dispose_list, struct se_task, t_list); | |
c66ac9db | 3312 | |
af3f00c7 CH |
3313 | if (task->task_sg != cmd->t_data_sg && |
3314 | task->task_sg != cmd->t_bidi_data_sg) | |
3315 | kfree(task->task_sg); | |
c66ac9db NB |
3316 | |
3317 | list_del(&task->t_list); | |
3318 | ||
42bf829e | 3319 | cmd->se_dev->transport->free_task(task); |
c66ac9db | 3320 | } |
c66ac9db NB |
3321 | } |
3322 | ||
6708bb27 | 3323 | static inline void transport_free_sgl(struct scatterlist *sgl, int nents) |
c66ac9db | 3324 | { |
ec98f782 | 3325 | struct scatterlist *sg; |
ec98f782 | 3326 | int count; |
c66ac9db | 3327 | |
6708bb27 AG |
3328 | for_each_sg(sgl, sg, nents, count) |
3329 | __free_page(sg_page(sg)); | |
c66ac9db | 3330 | |
6708bb27 AG |
3331 | kfree(sgl); |
3332 | } | |
c66ac9db | 3333 | |
6708bb27 AG |
3334 | static inline void transport_free_pages(struct se_cmd *cmd) |
3335 | { | |
3336 | if (cmd->se_cmd_flags & SCF_PASSTHROUGH_SG_TO_MEM_NOALLOC) | |
3337 | return; | |
3338 | ||
3339 | transport_free_sgl(cmd->t_data_sg, cmd->t_data_nents); | |
ec98f782 AG |
3340 | cmd->t_data_sg = NULL; |
3341 | cmd->t_data_nents = 0; | |
c66ac9db | 3342 | |
6708bb27 | 3343 | transport_free_sgl(cmd->t_bidi_data_sg, cmd->t_bidi_data_nents); |
ec98f782 AG |
3344 | cmd->t_bidi_data_sg = NULL; |
3345 | cmd->t_bidi_data_nents = 0; | |
c66ac9db NB |
3346 | } |
3347 | ||
d3df7825 CH |
3348 | /** |
3349 | * transport_put_cmd - release a reference to a command | |
3350 | * @cmd: command to release | |
3351 | * | |
3352 | * This routine releases our reference to the command and frees it if possible. | |
3353 | */ | |
39c05f32 | 3354 | static void transport_put_cmd(struct se_cmd *cmd) |
c66ac9db NB |
3355 | { |
3356 | unsigned long flags; | |
4911e3cc | 3357 | int free_tasks = 0; |
c66ac9db | 3358 | |
a1d8b49a | 3359 | spin_lock_irqsave(&cmd->t_state_lock, flags); |
4911e3cc CH |
3360 | if (atomic_read(&cmd->t_fe_count)) { |
3361 | if (!atomic_dec_and_test(&cmd->t_fe_count)) | |
3362 | goto out_busy; | |
3363 | } | |
3364 | ||
3365 | if (atomic_read(&cmd->t_se_count)) { | |
3366 | if (!atomic_dec_and_test(&cmd->t_se_count)) | |
3367 | goto out_busy; | |
3368 | } | |
3369 | ||
3370 | if (atomic_read(&cmd->transport_dev_active)) { | |
3371 | atomic_set(&cmd->transport_dev_active, 0); | |
3372 | transport_all_task_dev_remove_state(cmd); | |
3373 | free_tasks = 1; | |
c66ac9db | 3374 | } |
a1d8b49a | 3375 | spin_unlock_irqrestore(&cmd->t_state_lock, flags); |
c66ac9db | 3376 | |
4911e3cc CH |
3377 | if (free_tasks != 0) |
3378 | transport_free_dev_tasks(cmd); | |
d3df7825 | 3379 | |
c66ac9db | 3380 | transport_free_pages(cmd); |
31afc39c | 3381 | transport_release_cmd(cmd); |
39c05f32 | 3382 | return; |
4911e3cc CH |
3383 | out_busy: |
3384 | spin_unlock_irqrestore(&cmd->t_state_lock, flags); | |
c66ac9db NB |
3385 | } |
3386 | ||
c66ac9db | 3387 | /* |
ec98f782 AG |
3388 | * transport_generic_map_mem_to_cmd - Use fabric-alloced pages instead of |
3389 | * allocating in the core. | |
c66ac9db NB |
3390 | * @cmd: Associated se_cmd descriptor |
3391 | * @mem: SGL style memory for TCM WRITE / READ | |
3392 | * @sg_mem_num: Number of SGL elements | |
3393 | * @mem_bidi_in: SGL style memory for TCM BIDI READ | |
3394 | * @sg_mem_bidi_num: Number of BIDI READ SGL elements | |
3395 | * | |
3396 | * Return: nonzero return cmd was rejected for -ENOMEM or inproper usage | |
3397 | * of parameters. | |
3398 | */ | |
3399 | int transport_generic_map_mem_to_cmd( | |
3400 | struct se_cmd *cmd, | |
5951146d AG |
3401 | struct scatterlist *sgl, |
3402 | u32 sgl_count, | |
3403 | struct scatterlist *sgl_bidi, | |
3404 | u32 sgl_bidi_count) | |
c66ac9db | 3405 | { |
5951146d | 3406 | if (!sgl || !sgl_count) |
c66ac9db | 3407 | return 0; |
c66ac9db | 3408 | |
c66ac9db NB |
3409 | if ((cmd->se_cmd_flags & SCF_SCSI_DATA_SG_IO_CDB) || |
3410 | (cmd->se_cmd_flags & SCF_SCSI_CONTROL_SG_IO_CDB)) { | |
fef58a60 NB |
3411 | /* |
3412 | * Reject SCSI data overflow with map_mem_to_cmd() as incoming | |
3413 | * scatterlists already have been set to follow what the fabric | |
3414 | * passes for the original expected data transfer length. | |
3415 | */ | |
3416 | if (cmd->se_cmd_flags & SCF_OVERFLOW_BIT) { | |
3417 | pr_warn("Rejecting SCSI DATA overflow for fabric using" | |
3418 | " SCF_PASSTHROUGH_SG_TO_MEM_NOALLOC\n"); | |
3419 | cmd->se_cmd_flags |= SCF_SCSI_CDB_EXCEPTION; | |
3420 | cmd->scsi_sense_reason = TCM_INVALID_CDB_FIELD; | |
3421 | return -EINVAL; | |
3422 | } | |
c66ac9db | 3423 | |
ec98f782 AG |
3424 | cmd->t_data_sg = sgl; |
3425 | cmd->t_data_nents = sgl_count; | |
c66ac9db | 3426 | |
ec98f782 AG |
3427 | if (sgl_bidi && sgl_bidi_count) { |
3428 | cmd->t_bidi_data_sg = sgl_bidi; | |
3429 | cmd->t_bidi_data_nents = sgl_bidi_count; | |
c66ac9db NB |
3430 | } |
3431 | cmd->se_cmd_flags |= SCF_PASSTHROUGH_SG_TO_MEM_NOALLOC; | |
c66ac9db NB |
3432 | } |
3433 | ||
3434 | return 0; | |
3435 | } | |
3436 | EXPORT_SYMBOL(transport_generic_map_mem_to_cmd); | |
3437 | ||
05d1c7c0 AG |
3438 | void *transport_kmap_first_data_page(struct se_cmd *cmd) |
3439 | { | |
ec98f782 | 3440 | struct scatterlist *sg = cmd->t_data_sg; |
05d1c7c0 | 3441 | |
ec98f782 | 3442 | BUG_ON(!sg); |
05d1c7c0 | 3443 | /* |
ec98f782 AG |
3444 | * We need to take into account a possible offset here for fabrics like |
3445 | * tcm_loop who may be using a contig buffer from the SCSI midlayer for | |
3446 | * control CDBs passed as SGLs via transport_generic_map_mem_to_cmd() | |
05d1c7c0 | 3447 | */ |
ec98f782 | 3448 | return kmap(sg_page(sg)) + sg->offset; |
05d1c7c0 AG |
3449 | } |
3450 | EXPORT_SYMBOL(transport_kmap_first_data_page); | |
3451 | ||
3452 | void transport_kunmap_first_data_page(struct se_cmd *cmd) | |
3453 | { | |
ec98f782 | 3454 | kunmap(sg_page(cmd->t_data_sg)); |
05d1c7c0 AG |
3455 | } |
3456 | EXPORT_SYMBOL(transport_kunmap_first_data_page); | |
3457 | ||
c66ac9db | 3458 | static int |
05d1c7c0 | 3459 | transport_generic_get_mem(struct se_cmd *cmd) |
c66ac9db | 3460 | { |
ec98f782 AG |
3461 | u32 length = cmd->data_length; |
3462 | unsigned int nents; | |
3463 | struct page *page; | |
3464 | int i = 0; | |
c66ac9db | 3465 | |
ec98f782 AG |
3466 | nents = DIV_ROUND_UP(length, PAGE_SIZE); |
3467 | cmd->t_data_sg = kmalloc(sizeof(struct scatterlist) * nents, GFP_KERNEL); | |
3468 | if (!cmd->t_data_sg) | |
3469 | return -ENOMEM; | |
c66ac9db | 3470 | |
ec98f782 AG |
3471 | cmd->t_data_nents = nents; |
3472 | sg_init_table(cmd->t_data_sg, nents); | |
c66ac9db | 3473 | |
ec98f782 AG |
3474 | while (length) { |
3475 | u32 page_len = min_t(u32, length, PAGE_SIZE); | |
3476 | page = alloc_page(GFP_KERNEL | __GFP_ZERO); | |
3477 | if (!page) | |
3478 | goto out; | |
c66ac9db | 3479 | |
ec98f782 AG |
3480 | sg_set_page(&cmd->t_data_sg[i], page, page_len, 0); |
3481 | length -= page_len; | |
3482 | i++; | |
c66ac9db | 3483 | } |
c66ac9db | 3484 | return 0; |
c66ac9db | 3485 | |
ec98f782 AG |
3486 | out: |
3487 | while (i >= 0) { | |
3488 | __free_page(sg_page(&cmd->t_data_sg[i])); | |
3489 | i--; | |
c66ac9db | 3490 | } |
ec98f782 AG |
3491 | kfree(cmd->t_data_sg); |
3492 | cmd->t_data_sg = NULL; | |
3493 | return -ENOMEM; | |
c66ac9db NB |
3494 | } |
3495 | ||
a1d8b49a AG |
3496 | /* Reduce sectors if they are too long for the device */ |
3497 | static inline sector_t transport_limit_task_sectors( | |
c66ac9db NB |
3498 | struct se_device *dev, |
3499 | unsigned long long lba, | |
a1d8b49a | 3500 | sector_t sectors) |
c66ac9db | 3501 | { |
a1d8b49a | 3502 | sectors = min_t(sector_t, sectors, dev->se_sub_dev->se_dev_attrib.max_sectors); |
c66ac9db | 3503 | |
a1d8b49a AG |
3504 | if (dev->transport->get_device_type(dev) == TYPE_DISK) |
3505 | if ((lba + sectors) > transport_dev_end_lba(dev)) | |
3506 | sectors = ((transport_dev_end_lba(dev) - lba) + 1); | |
c66ac9db | 3507 | |
a1d8b49a | 3508 | return sectors; |
c66ac9db NB |
3509 | } |
3510 | ||
c66ac9db NB |
3511 | |
3512 | /* | |
3513 | * This function can be used by HW target mode drivers to create a linked | |
3514 | * scatterlist from all contiguously allocated struct se_task->task_sg[]. | |
3515 | * This is intended to be called during the completion path by TCM Core | |
3516 | * when struct target_core_fabric_ops->check_task_sg_chaining is enabled. | |
3517 | */ | |
3518 | void transport_do_task_sg_chain(struct se_cmd *cmd) | |
3519 | { | |
ec98f782 AG |
3520 | struct scatterlist *sg_first = NULL; |
3521 | struct scatterlist *sg_prev = NULL; | |
3522 | int sg_prev_nents = 0; | |
3523 | struct scatterlist *sg; | |
c66ac9db | 3524 | struct se_task *task; |
ec98f782 | 3525 | u32 chained_nents = 0; |
c66ac9db NB |
3526 | int i; |
3527 | ||
ec98f782 AG |
3528 | BUG_ON(!cmd->se_tfo->task_sg_chaining); |
3529 | ||
c66ac9db NB |
3530 | /* |
3531 | * Walk the struct se_task list and setup scatterlist chains | |
a1d8b49a | 3532 | * for each contiguously allocated struct se_task->task_sg[]. |
c66ac9db | 3533 | */ |
a1d8b49a | 3534 | list_for_each_entry(task, &cmd->t_task_list, t_list) { |
ec98f782 | 3535 | if (!task->task_sg) |
c66ac9db NB |
3536 | continue; |
3537 | ||
ec98f782 AG |
3538 | if (!sg_first) { |
3539 | sg_first = task->task_sg; | |
6708bb27 | 3540 | chained_nents = task->task_sg_nents; |
97868c89 | 3541 | } else { |
ec98f782 | 3542 | sg_chain(sg_prev, sg_prev_nents, task->task_sg); |
6708bb27 | 3543 | chained_nents += task->task_sg_nents; |
97868c89 | 3544 | } |
c3c74c7a NB |
3545 | /* |
3546 | * For the padded tasks, use the extra SGL vector allocated | |
3547 | * in transport_allocate_data_tasks() for the sg_prev_nents | |
04629b7b CH |
3548 | * offset into sg_chain() above. |
3549 | * | |
3550 | * We do not need the padding for the last task (or a single | |
3551 | * task), but in that case we will never use the sg_prev_nents | |
3552 | * value below which would be incorrect. | |
c3c74c7a | 3553 | */ |
04629b7b | 3554 | sg_prev_nents = (task->task_sg_nents + 1); |
ec98f782 | 3555 | sg_prev = task->task_sg; |
c66ac9db NB |
3556 | } |
3557 | /* | |
3558 | * Setup the starting pointer and total t_tasks_sg_linked_no including | |
3559 | * padding SGs for linking and to mark the end. | |
3560 | */ | |
a1d8b49a | 3561 | cmd->t_tasks_sg_chained = sg_first; |
ec98f782 | 3562 | cmd->t_tasks_sg_chained_no = chained_nents; |
c66ac9db | 3563 | |
6708bb27 | 3564 | pr_debug("Setup cmd: %p cmd->t_tasks_sg_chained: %p and" |
a1d8b49a AG |
3565 | " t_tasks_sg_chained_no: %u\n", cmd, cmd->t_tasks_sg_chained, |
3566 | cmd->t_tasks_sg_chained_no); | |
c66ac9db | 3567 | |
a1d8b49a AG |
3568 | for_each_sg(cmd->t_tasks_sg_chained, sg, |
3569 | cmd->t_tasks_sg_chained_no, i) { | |
c66ac9db | 3570 | |
6708bb27 | 3571 | pr_debug("SG[%d]: %p page: %p length: %d offset: %d\n", |
5951146d | 3572 | i, sg, sg_page(sg), sg->length, sg->offset); |
c66ac9db | 3573 | if (sg_is_chain(sg)) |
6708bb27 | 3574 | pr_debug("SG: %p sg_is_chain=1\n", sg); |
c66ac9db | 3575 | if (sg_is_last(sg)) |
6708bb27 | 3576 | pr_debug("SG: %p sg_is_last=1\n", sg); |
c66ac9db | 3577 | } |
c66ac9db NB |
3578 | } |
3579 | EXPORT_SYMBOL(transport_do_task_sg_chain); | |
3580 | ||
a1d8b49a AG |
3581 | /* |
3582 | * Break up cmd into chunks transport can handle | |
3583 | */ | |
38b40067 CH |
3584 | static int |
3585 | transport_allocate_data_tasks(struct se_cmd *cmd, | |
c66ac9db | 3586 | enum dma_data_direction data_direction, |
38b40067 | 3587 | struct scatterlist *cmd_sg, unsigned int sgl_nents) |
c66ac9db | 3588 | { |
5951146d | 3589 | struct se_device *dev = cmd->se_dev; |
a3eedc22 | 3590 | int task_count, i; |
38b40067 CH |
3591 | unsigned long long lba; |
3592 | sector_t sectors, dev_max_sectors; | |
3593 | u32 sector_size; | |
3594 | ||
3595 | if (transport_cmd_get_valid_sectors(cmd) < 0) | |
3596 | return -EINVAL; | |
3597 | ||
3598 | dev_max_sectors = dev->se_sub_dev->se_dev_attrib.max_sectors; | |
3599 | sector_size = dev->se_sub_dev->se_dev_attrib.block_size; | |
a1d8b49a | 3600 | |
ec98f782 | 3601 | WARN_ON(cmd->data_length % sector_size); |
38b40067 CH |
3602 | |
3603 | lba = cmd->t_task_lba; | |
ec98f782 | 3604 | sectors = DIV_ROUND_UP(cmd->data_length, sector_size); |
277c5f27 | 3605 | task_count = DIV_ROUND_UP_SECTOR_T(sectors, dev_max_sectors); |
af3f00c7 CH |
3606 | |
3607 | /* | |
3608 | * If we need just a single task reuse the SG list in the command | |
3609 | * and avoid a lot of work. | |
3610 | */ | |
3611 | if (task_count == 1) { | |
3612 | struct se_task *task; | |
3613 | unsigned long flags; | |
3614 | ||
3615 | task = transport_generic_get_task(cmd, data_direction); | |
3616 | if (!task) | |
3617 | return -ENOMEM; | |
3618 | ||
3619 | task->task_sg = cmd_sg; | |
3620 | task->task_sg_nents = sgl_nents; | |
3621 | ||
3622 | task->task_lba = lba; | |
3623 | task->task_sectors = sectors; | |
3624 | task->task_size = task->task_sectors * sector_size; | |
3625 | ||
3626 | spin_lock_irqsave(&cmd->t_state_lock, flags); | |
3627 | list_add_tail(&task->t_list, &cmd->t_task_list); | |
3628 | spin_unlock_irqrestore(&cmd->t_state_lock, flags); | |
3629 | ||
3630 | return task_count; | |
3631 | } | |
3632 | ||
ec98f782 | 3633 | for (i = 0; i < task_count; i++) { |
38b40067 | 3634 | struct se_task *task; |
c3c74c7a | 3635 | unsigned int task_size, task_sg_nents_padded; |
38b40067 CH |
3636 | struct scatterlist *sg; |
3637 | unsigned long flags; | |
ec98f782 | 3638 | int count; |
a1d8b49a | 3639 | |
c66ac9db | 3640 | task = transport_generic_get_task(cmd, data_direction); |
a1d8b49a | 3641 | if (!task) |
ec98f782 | 3642 | return -ENOMEM; |
c66ac9db | 3643 | |
c66ac9db | 3644 | task->task_lba = lba; |
ec98f782 AG |
3645 | task->task_sectors = min(sectors, dev_max_sectors); |
3646 | task->task_size = task->task_sectors * sector_size; | |
c66ac9db | 3647 | |
525a48a2 NB |
3648 | /* |
3649 | * This now assumes that passed sg_ents are in PAGE_SIZE chunks | |
3650 | * in order to calculate the number per task SGL entries | |
3651 | */ | |
3652 | task->task_sg_nents = DIV_ROUND_UP(task->task_size, PAGE_SIZE); | |
c66ac9db | 3653 | /* |
ec98f782 AG |
3654 | * Check if the fabric module driver is requesting that all |
3655 | * struct se_task->task_sg[] be chained together.. If so, | |
3656 | * then allocate an extra padding SG entry for linking and | |
c3c74c7a NB |
3657 | * marking the end of the chained SGL for every task except |
3658 | * the last one for (task_count > 1) operation, or skipping | |
3659 | * the extra padding for the (task_count == 1) case. | |
c66ac9db | 3660 | */ |
c3c74c7a NB |
3661 | if (cmd->se_tfo->task_sg_chaining && (i < (task_count - 1))) { |
3662 | task_sg_nents_padded = (task->task_sg_nents + 1); | |
c3c74c7a NB |
3663 | } else |
3664 | task_sg_nents_padded = task->task_sg_nents; | |
c66ac9db | 3665 | |
1d20bb61 | 3666 | task->task_sg = kmalloc(sizeof(struct scatterlist) * |
c3c74c7a | 3667 | task_sg_nents_padded, GFP_KERNEL); |
ec98f782 AG |
3668 | if (!task->task_sg) { |
3669 | cmd->se_dev->transport->free_task(task); | |
3670 | return -ENOMEM; | |
3671 | } | |
3672 | ||
c3c74c7a | 3673 | sg_init_table(task->task_sg, task_sg_nents_padded); |
c66ac9db | 3674 | |
ec98f782 AG |
3675 | task_size = task->task_size; |
3676 | ||
3677 | /* Build new sgl, only up to task_size */ | |
6708bb27 | 3678 | for_each_sg(task->task_sg, sg, task->task_sg_nents, count) { |
ec98f782 AG |
3679 | if (cmd_sg->length > task_size) |
3680 | break; | |
3681 | ||
3682 | *sg = *cmd_sg; | |
3683 | task_size -= cmd_sg->length; | |
3684 | cmd_sg = sg_next(cmd_sg); | |
c66ac9db | 3685 | } |
c66ac9db | 3686 | |
ec98f782 AG |
3687 | lba += task->task_sectors; |
3688 | sectors -= task->task_sectors; | |
c66ac9db | 3689 | |
ec98f782 AG |
3690 | spin_lock_irqsave(&cmd->t_state_lock, flags); |
3691 | list_add_tail(&task->t_list, &cmd->t_task_list); | |
3692 | spin_unlock_irqrestore(&cmd->t_state_lock, flags); | |
c66ac9db NB |
3693 | } |
3694 | ||
ec98f782 | 3695 | return task_count; |
c66ac9db NB |
3696 | } |
3697 | ||
3698 | static int | |
ec98f782 | 3699 | transport_allocate_control_task(struct se_cmd *cmd) |
c66ac9db | 3700 | { |
c66ac9db | 3701 | struct se_task *task; |
ec98f782 | 3702 | unsigned long flags; |
c66ac9db NB |
3703 | |
3704 | task = transport_generic_get_task(cmd, cmd->data_direction); | |
3705 | if (!task) | |
ec98f782 | 3706 | return -ENOMEM; |
c66ac9db | 3707 | |
af3f00c7 | 3708 | task->task_sg = cmd->t_data_sg; |
c66ac9db | 3709 | task->task_size = cmd->data_length; |
6708bb27 | 3710 | task->task_sg_nents = cmd->t_data_nents; |
c66ac9db | 3711 | |
ec98f782 AG |
3712 | spin_lock_irqsave(&cmd->t_state_lock, flags); |
3713 | list_add_tail(&task->t_list, &cmd->t_task_list); | |
3714 | spin_unlock_irqrestore(&cmd->t_state_lock, flags); | |
c66ac9db | 3715 | |
6708bb27 | 3716 | /* Success! Return number of tasks allocated */ |
a3eedc22 | 3717 | return 1; |
ec98f782 AG |
3718 | } |
3719 | ||
da0f7619 CH |
3720 | /* |
3721 | * Allocate any required ressources to execute the command, and either place | |
3722 | * it on the execution queue if possible. For writes we might not have the | |
3723 | * payload yet, thus notify the fabric via a call to ->write_pending instead. | |
c66ac9db | 3724 | */ |
a1d8b49a | 3725 | int transport_generic_new_cmd(struct se_cmd *cmd) |
c66ac9db | 3726 | { |
da0f7619 | 3727 | struct se_device *dev = cmd->se_dev; |
9ac54987 | 3728 | int task_cdbs, task_cdbs_bidi = 0; |
da0f7619 | 3729 | int set_counts = 1; |
c66ac9db NB |
3730 | int ret = 0; |
3731 | ||
3732 | /* | |
3733 | * Determine is the TCM fabric module has already allocated physical | |
3734 | * memory, and is directly calling transport_generic_map_mem_to_cmd() | |
ec98f782 | 3735 | * beforehand. |
c66ac9db | 3736 | */ |
ec98f782 AG |
3737 | if (!(cmd->se_cmd_flags & SCF_PASSTHROUGH_SG_TO_MEM_NOALLOC) && |
3738 | cmd->data_length) { | |
05d1c7c0 | 3739 | ret = transport_generic_get_mem(cmd); |
c66ac9db | 3740 | if (ret < 0) |
03e98c9e | 3741 | goto out_fail; |
c66ac9db | 3742 | } |
da0f7619 | 3743 | |
1d20bb61 | 3744 | /* |
38b40067 | 3745 | * For BIDI command set up the read tasks first. |
1d20bb61 | 3746 | */ |
da0f7619 | 3747 | if (cmd->t_bidi_data_sg && |
38b40067 CH |
3748 | dev->transport->transport_type != TRANSPORT_PLUGIN_PHBA_PDEV) { |
3749 | BUG_ON(!(cmd->se_cmd_flags & SCF_SCSI_DATA_SG_IO_CDB)); | |
3750 | ||
9ac54987 NB |
3751 | task_cdbs_bidi = transport_allocate_data_tasks(cmd, |
3752 | DMA_FROM_DEVICE, cmd->t_bidi_data_sg, | |
3753 | cmd->t_bidi_data_nents); | |
3754 | if (task_cdbs_bidi <= 0) | |
da0f7619 CH |
3755 | goto out_fail; |
3756 | ||
3757 | atomic_inc(&cmd->t_fe_count); | |
3758 | atomic_inc(&cmd->t_se_count); | |
3759 | set_counts = 0; | |
3760 | } | |
38b40067 CH |
3761 | |
3762 | if (cmd->se_cmd_flags & SCF_SCSI_DATA_SG_IO_CDB) { | |
3763 | task_cdbs = transport_allocate_data_tasks(cmd, | |
3764 | cmd->data_direction, cmd->t_data_sg, | |
3765 | cmd->t_data_nents); | |
3766 | } else { | |
3767 | task_cdbs = transport_allocate_control_task(cmd); | |
3768 | } | |
3769 | ||
410f6702 | 3770 | if (task_cdbs < 0) |
da0f7619 | 3771 | goto out_fail; |
410f6702 RD |
3772 | else if (!task_cdbs && (cmd->se_cmd_flags & SCF_SCSI_DATA_SG_IO_CDB)) { |
3773 | cmd->t_state = TRANSPORT_COMPLETE; | |
3774 | atomic_set(&cmd->t_transport_active, 1); | |
3775 | INIT_WORK(&cmd->work, target_complete_ok_work); | |
3776 | queue_work(target_completion_wq, &cmd->work); | |
3777 | return 0; | |
3778 | } | |
da0f7619 CH |
3779 | |
3780 | if (set_counts) { | |
3781 | atomic_inc(&cmd->t_fe_count); | |
3782 | atomic_inc(&cmd->t_se_count); | |
3783 | } | |
3784 | ||
9ac54987 NB |
3785 | cmd->t_task_list_num = (task_cdbs + task_cdbs_bidi); |
3786 | atomic_set(&cmd->t_task_cdbs_left, cmd->t_task_list_num); | |
3787 | atomic_set(&cmd->t_task_cdbs_ex_left, cmd->t_task_list_num); | |
da0f7619 | 3788 | |
c66ac9db | 3789 | /* |
a1d8b49a | 3790 | * For WRITEs, let the fabric know its buffer is ready.. |
c66ac9db NB |
3791 | * This WRITE struct se_cmd (and all of its associated struct se_task's) |
3792 | * will be added to the struct se_device execution queue after its WRITE | |
3793 | * data has arrived. (ie: It gets handled by the transport processing | |
3794 | * thread a second time) | |
3795 | */ | |
3796 | if (cmd->data_direction == DMA_TO_DEVICE) { | |
3797 | transport_add_tasks_to_state_queue(cmd); | |
3798 | return transport_generic_write_pending(cmd); | |
3799 | } | |
3800 | /* | |
3801 | * Everything else but a WRITE, add the struct se_cmd's struct se_task's | |
3802 | * to the execution queue. | |
3803 | */ | |
3804 | transport_execute_tasks(cmd); | |
3805 | return 0; | |
da0f7619 CH |
3806 | |
3807 | out_fail: | |
3808 | cmd->se_cmd_flags |= SCF_SCSI_CDB_EXCEPTION; | |
3809 | cmd->scsi_sense_reason = TCM_LOGICAL_UNIT_COMMUNICATION_FAILURE; | |
3810 | return -EINVAL; | |
c66ac9db | 3811 | } |
a1d8b49a | 3812 | EXPORT_SYMBOL(transport_generic_new_cmd); |
c66ac9db NB |
3813 | |
3814 | /* transport_generic_process_write(): | |
3815 | * | |
3816 | * | |
3817 | */ | |
3818 | void transport_generic_process_write(struct se_cmd *cmd) | |
3819 | { | |
c66ac9db NB |
3820 | transport_execute_tasks(cmd); |
3821 | } | |
3822 | EXPORT_SYMBOL(transport_generic_process_write); | |
3823 | ||
e057f533 | 3824 | static void transport_write_pending_qf(struct se_cmd *cmd) |
07bde79a | 3825 | { |
f147abb4 NB |
3826 | int ret; |
3827 | ||
3828 | ret = cmd->se_tfo->write_pending(cmd); | |
3829 | if (ret == -EAGAIN || ret == -ENOMEM) { | |
e057f533 CH |
3830 | pr_debug("Handling write_pending QUEUE__FULL: se_cmd: %p\n", |
3831 | cmd); | |
3832 | transport_handle_queue_full(cmd, cmd->se_dev); | |
3833 | } | |
07bde79a NB |
3834 | } |
3835 | ||
c66ac9db NB |
3836 | static int transport_generic_write_pending(struct se_cmd *cmd) |
3837 | { | |
3838 | unsigned long flags; | |
3839 | int ret; | |
3840 | ||
a1d8b49a | 3841 | spin_lock_irqsave(&cmd->t_state_lock, flags); |
c66ac9db | 3842 | cmd->t_state = TRANSPORT_WRITE_PENDING; |
a1d8b49a | 3843 | spin_unlock_irqrestore(&cmd->t_state_lock, flags); |
07bde79a | 3844 | |
c66ac9db NB |
3845 | /* |
3846 | * Clear the se_cmd for WRITE_PENDING status in order to set | |
a1d8b49a | 3847 | * cmd->t_transport_active=0 so that transport_generic_handle_data |
c66ac9db | 3848 | * can be called from HW target mode interrupt code. This is safe |
e3d6f909 | 3849 | * to be called with transport_off=1 before the cmd->se_tfo->write_pending |
c66ac9db NB |
3850 | * because the se_cmd->se_lun pointer is not being cleared. |
3851 | */ | |
3852 | transport_cmd_check_stop(cmd, 1, 0); | |
3853 | ||
3854 | /* | |
3855 | * Call the fabric write_pending function here to let the | |
3856 | * frontend know that WRITE buffers are ready. | |
3857 | */ | |
e3d6f909 | 3858 | ret = cmd->se_tfo->write_pending(cmd); |
f147abb4 | 3859 | if (ret == -EAGAIN || ret == -ENOMEM) |
07bde79a NB |
3860 | goto queue_full; |
3861 | else if (ret < 0) | |
c66ac9db NB |
3862 | return ret; |
3863 | ||
03e98c9e | 3864 | return 1; |
07bde79a NB |
3865 | |
3866 | queue_full: | |
6708bb27 | 3867 | pr_debug("Handling write_pending QUEUE__FULL: se_cmd: %p\n", cmd); |
07bde79a | 3868 | cmd->t_state = TRANSPORT_COMPLETE_QF_WP; |
e057f533 | 3869 | transport_handle_queue_full(cmd, cmd->se_dev); |
f147abb4 | 3870 | return 0; |
c66ac9db NB |
3871 | } |
3872 | ||
2dbc43d2 CH |
3873 | /** |
3874 | * transport_release_cmd - free a command | |
3875 | * @cmd: command to free | |
3876 | * | |
3877 | * This routine unconditionally frees a command, and reference counting | |
3878 | * or list removal must be done in the caller. | |
3879 | */ | |
35462975 | 3880 | void transport_release_cmd(struct se_cmd *cmd) |
c66ac9db | 3881 | { |
e3d6f909 | 3882 | BUG_ON(!cmd->se_tfo); |
c66ac9db | 3883 | |
2dbc43d2 CH |
3884 | if (cmd->se_tmr_req) |
3885 | core_tmr_release_req(cmd->se_tmr_req); | |
3886 | if (cmd->t_task_cdb != cmd->__t_task_cdb) | |
3887 | kfree(cmd->t_task_cdb); | |
a17f091d NB |
3888 | /* |
3889 | * Check if target_wait_for_sess_cmds() is expecting to | |
3890 | * release se_cmd directly here.. | |
3891 | */ | |
3892 | if (cmd->check_release != 0 && cmd->se_tfo->check_release_cmd) | |
3893 | if (cmd->se_tfo->check_release_cmd(cmd) != 0) | |
3894 | return; | |
3895 | ||
35462975 | 3896 | cmd->se_tfo->release_cmd(cmd); |
c66ac9db | 3897 | } |
35462975 | 3898 | EXPORT_SYMBOL(transport_release_cmd); |
c66ac9db | 3899 | |
39c05f32 | 3900 | void transport_generic_free_cmd(struct se_cmd *cmd, int wait_for_tasks) |
c66ac9db | 3901 | { |
d14921d6 NB |
3902 | if (!(cmd->se_cmd_flags & SCF_SE_LUN_CMD)) { |
3903 | if (wait_for_tasks && cmd->se_tmr_req) | |
3904 | transport_wait_for_tasks(cmd); | |
3905 | ||
35462975 | 3906 | transport_release_cmd(cmd); |
d14921d6 NB |
3907 | } else { |
3908 | if (wait_for_tasks) | |
3909 | transport_wait_for_tasks(cmd); | |
3910 | ||
c66ac9db NB |
3911 | core_dec_lacl_count(cmd->se_sess->se_node_acl, cmd); |
3912 | ||
82f1c8a4 | 3913 | if (cmd->se_lun) |
c66ac9db | 3914 | transport_lun_remove_cmd(cmd); |
c66ac9db | 3915 | |
f4366772 NB |
3916 | transport_free_dev_tasks(cmd); |
3917 | ||
39c05f32 | 3918 | transport_put_cmd(cmd); |
c66ac9db NB |
3919 | } |
3920 | } | |
3921 | EXPORT_SYMBOL(transport_generic_free_cmd); | |
3922 | ||
a17f091d NB |
3923 | /* target_get_sess_cmd - Add command to active ->sess_cmd_list |
3924 | * @se_sess: session to reference | |
3925 | * @se_cmd: command descriptor to add | |
3926 | */ | |
3927 | void target_get_sess_cmd(struct se_session *se_sess, struct se_cmd *se_cmd) | |
3928 | { | |
3929 | unsigned long flags; | |
3930 | ||
3931 | spin_lock_irqsave(&se_sess->sess_cmd_lock, flags); | |
3932 | list_add_tail(&se_cmd->se_cmd_list, &se_sess->sess_cmd_list); | |
3933 | se_cmd->check_release = 1; | |
3934 | spin_unlock_irqrestore(&se_sess->sess_cmd_lock, flags); | |
3935 | } | |
3936 | EXPORT_SYMBOL(target_get_sess_cmd); | |
3937 | ||
3938 | /* target_put_sess_cmd - Check for active I/O shutdown or list delete | |
3939 | * @se_sess: session to reference | |
3940 | * @se_cmd: command descriptor to drop | |
3941 | */ | |
3942 | int target_put_sess_cmd(struct se_session *se_sess, struct se_cmd *se_cmd) | |
3943 | { | |
3944 | unsigned long flags; | |
3945 | ||
3946 | spin_lock_irqsave(&se_sess->sess_cmd_lock, flags); | |
3947 | if (list_empty(&se_cmd->se_cmd_list)) { | |
3948 | spin_unlock_irqrestore(&se_sess->sess_cmd_lock, flags); | |
3949 | WARN_ON(1); | |
3950 | return 0; | |
3951 | } | |
3952 | ||
3953 | if (se_sess->sess_tearing_down && se_cmd->cmd_wait_set) { | |
3954 | spin_unlock_irqrestore(&se_sess->sess_cmd_lock, flags); | |
3955 | complete(&se_cmd->cmd_wait_comp); | |
3956 | return 1; | |
3957 | } | |
3958 | list_del(&se_cmd->se_cmd_list); | |
3959 | spin_unlock_irqrestore(&se_sess->sess_cmd_lock, flags); | |
3960 | ||
3961 | return 0; | |
3962 | } | |
3963 | EXPORT_SYMBOL(target_put_sess_cmd); | |
3964 | ||
3965 | /* target_splice_sess_cmd_list - Split active cmds into sess_wait_list | |
3966 | * @se_sess: session to split | |
3967 | */ | |
3968 | void target_splice_sess_cmd_list(struct se_session *se_sess) | |
3969 | { | |
3970 | struct se_cmd *se_cmd; | |
3971 | unsigned long flags; | |
3972 | ||
3973 | WARN_ON(!list_empty(&se_sess->sess_wait_list)); | |
3974 | INIT_LIST_HEAD(&se_sess->sess_wait_list); | |
3975 | ||
3976 | spin_lock_irqsave(&se_sess->sess_cmd_lock, flags); | |
3977 | se_sess->sess_tearing_down = 1; | |
3978 | ||
3979 | list_splice_init(&se_sess->sess_cmd_list, &se_sess->sess_wait_list); | |
3980 | ||
3981 | list_for_each_entry(se_cmd, &se_sess->sess_wait_list, se_cmd_list) | |
3982 | se_cmd->cmd_wait_set = 1; | |
3983 | ||
3984 | spin_unlock_irqrestore(&se_sess->sess_cmd_lock, flags); | |
3985 | } | |
3986 | EXPORT_SYMBOL(target_splice_sess_cmd_list); | |
3987 | ||
3988 | /* target_wait_for_sess_cmds - Wait for outstanding descriptors | |
3989 | * @se_sess: session to wait for active I/O | |
3990 | * @wait_for_tasks: Make extra transport_wait_for_tasks call | |
3991 | */ | |
3992 | void target_wait_for_sess_cmds( | |
3993 | struct se_session *se_sess, | |
3994 | int wait_for_tasks) | |
3995 | { | |
3996 | struct se_cmd *se_cmd, *tmp_cmd; | |
3997 | bool rc = false; | |
3998 | ||
3999 | list_for_each_entry_safe(se_cmd, tmp_cmd, | |
4000 | &se_sess->sess_wait_list, se_cmd_list) { | |
4001 | list_del(&se_cmd->se_cmd_list); | |
4002 | ||
4003 | pr_debug("Waiting for se_cmd: %p t_state: %d, fabric state:" | |
4004 | " %d\n", se_cmd, se_cmd->t_state, | |
4005 | se_cmd->se_tfo->get_cmd_state(se_cmd)); | |
4006 | ||
4007 | if (wait_for_tasks) { | |
4008 | pr_debug("Calling transport_wait_for_tasks se_cmd: %p t_state: %d," | |
4009 | " fabric state: %d\n", se_cmd, se_cmd->t_state, | |
4010 | se_cmd->se_tfo->get_cmd_state(se_cmd)); | |
4011 | ||
4012 | rc = transport_wait_for_tasks(se_cmd); | |
4013 | ||
4014 | pr_debug("After transport_wait_for_tasks se_cmd: %p t_state: %d," | |
4015 | " fabric state: %d\n", se_cmd, se_cmd->t_state, | |
4016 | se_cmd->se_tfo->get_cmd_state(se_cmd)); | |
4017 | } | |
4018 | ||
4019 | if (!rc) { | |
4020 | wait_for_completion(&se_cmd->cmd_wait_comp); | |
4021 | pr_debug("After cmd_wait_comp: se_cmd: %p t_state: %d" | |
4022 | " fabric state: %d\n", se_cmd, se_cmd->t_state, | |
4023 | se_cmd->se_tfo->get_cmd_state(se_cmd)); | |
4024 | } | |
4025 | ||
4026 | se_cmd->se_tfo->release_cmd(se_cmd); | |
4027 | } | |
4028 | } | |
4029 | EXPORT_SYMBOL(target_wait_for_sess_cmds); | |
4030 | ||
c66ac9db NB |
4031 | /* transport_lun_wait_for_tasks(): |
4032 | * | |
4033 | * Called from ConfigFS context to stop the passed struct se_cmd to allow | |
4034 | * an struct se_lun to be successfully shutdown. | |
4035 | */ | |
4036 | static int transport_lun_wait_for_tasks(struct se_cmd *cmd, struct se_lun *lun) | |
4037 | { | |
4038 | unsigned long flags; | |
4039 | int ret; | |
4040 | /* | |
4041 | * If the frontend has already requested this struct se_cmd to | |
4042 | * be stopped, we can safely ignore this struct se_cmd. | |
4043 | */ | |
a1d8b49a AG |
4044 | spin_lock_irqsave(&cmd->t_state_lock, flags); |
4045 | if (atomic_read(&cmd->t_transport_stop)) { | |
4046 | atomic_set(&cmd->transport_lun_stop, 0); | |
6708bb27 | 4047 | pr_debug("ConfigFS ITT[0x%08x] - t_transport_stop ==" |
e3d6f909 | 4048 | " TRUE, skipping\n", cmd->se_tfo->get_task_tag(cmd)); |
a1d8b49a | 4049 | spin_unlock_irqrestore(&cmd->t_state_lock, flags); |
c66ac9db | 4050 | transport_cmd_check_stop(cmd, 1, 0); |
e3d6f909 | 4051 | return -EPERM; |
c66ac9db | 4052 | } |
a1d8b49a AG |
4053 | atomic_set(&cmd->transport_lun_fe_stop, 1); |
4054 | spin_unlock_irqrestore(&cmd->t_state_lock, flags); | |
c66ac9db | 4055 | |
5951146d | 4056 | wake_up_interruptible(&cmd->se_dev->dev_queue_obj.thread_wq); |
c66ac9db NB |
4057 | |
4058 | ret = transport_stop_tasks_for_cmd(cmd); | |
4059 | ||
6708bb27 AG |
4060 | pr_debug("ConfigFS: cmd: %p t_tasks: %d stop tasks ret:" |
4061 | " %d\n", cmd, cmd->t_task_list_num, ret); | |
c66ac9db | 4062 | if (!ret) { |
6708bb27 | 4063 | pr_debug("ConfigFS: ITT[0x%08x] - stopping cmd....\n", |
e3d6f909 | 4064 | cmd->se_tfo->get_task_tag(cmd)); |
a1d8b49a | 4065 | wait_for_completion(&cmd->transport_lun_stop_comp); |
6708bb27 | 4066 | pr_debug("ConfigFS: ITT[0x%08x] - stopped cmd....\n", |
e3d6f909 | 4067 | cmd->se_tfo->get_task_tag(cmd)); |
c66ac9db | 4068 | } |
3df8d40b | 4069 | transport_remove_cmd_from_queue(cmd); |
c66ac9db NB |
4070 | |
4071 | return 0; | |
4072 | } | |
4073 | ||
c66ac9db NB |
4074 | static void __transport_clear_lun_from_sessions(struct se_lun *lun) |
4075 | { | |
4076 | struct se_cmd *cmd = NULL; | |
4077 | unsigned long lun_flags, cmd_flags; | |
4078 | /* | |
4079 | * Do exception processing and return CHECK_CONDITION status to the | |
4080 | * Initiator Port. | |
4081 | */ | |
4082 | spin_lock_irqsave(&lun->lun_cmd_lock, lun_flags); | |
5951146d AG |
4083 | while (!list_empty(&lun->lun_cmd_list)) { |
4084 | cmd = list_first_entry(&lun->lun_cmd_list, | |
4085 | struct se_cmd, se_lun_node); | |
4086 | list_del(&cmd->se_lun_node); | |
4087 | ||
a1d8b49a | 4088 | atomic_set(&cmd->transport_lun_active, 0); |
c66ac9db NB |
4089 | /* |
4090 | * This will notify iscsi_target_transport.c: | |
4091 | * transport_cmd_check_stop() that a LUN shutdown is in | |
4092 | * progress for the iscsi_cmd_t. | |
4093 | */ | |
a1d8b49a | 4094 | spin_lock(&cmd->t_state_lock); |
6708bb27 | 4095 | pr_debug("SE_LUN[%d] - Setting cmd->transport" |
c66ac9db | 4096 | "_lun_stop for ITT: 0x%08x\n", |
e3d6f909 AG |
4097 | cmd->se_lun->unpacked_lun, |
4098 | cmd->se_tfo->get_task_tag(cmd)); | |
a1d8b49a AG |
4099 | atomic_set(&cmd->transport_lun_stop, 1); |
4100 | spin_unlock(&cmd->t_state_lock); | |
c66ac9db NB |
4101 | |
4102 | spin_unlock_irqrestore(&lun->lun_cmd_lock, lun_flags); | |
4103 | ||
6708bb27 AG |
4104 | if (!cmd->se_lun) { |
4105 | pr_err("ITT: 0x%08x, [i,t]_state: %u/%u\n", | |
e3d6f909 AG |
4106 | cmd->se_tfo->get_task_tag(cmd), |
4107 | cmd->se_tfo->get_cmd_state(cmd), cmd->t_state); | |
c66ac9db NB |
4108 | BUG(); |
4109 | } | |
4110 | /* | |
4111 | * If the Storage engine still owns the iscsi_cmd_t, determine | |
4112 | * and/or stop its context. | |
4113 | */ | |
6708bb27 | 4114 | pr_debug("SE_LUN[%d] - ITT: 0x%08x before transport" |
e3d6f909 AG |
4115 | "_lun_wait_for_tasks()\n", cmd->se_lun->unpacked_lun, |
4116 | cmd->se_tfo->get_task_tag(cmd)); | |
c66ac9db | 4117 | |
e3d6f909 | 4118 | if (transport_lun_wait_for_tasks(cmd, cmd->se_lun) < 0) { |
c66ac9db NB |
4119 | spin_lock_irqsave(&lun->lun_cmd_lock, lun_flags); |
4120 | continue; | |
4121 | } | |
4122 | ||
6708bb27 | 4123 | pr_debug("SE_LUN[%d] - ITT: 0x%08x after transport_lun" |
c66ac9db | 4124 | "_wait_for_tasks(): SUCCESS\n", |
e3d6f909 AG |
4125 | cmd->se_lun->unpacked_lun, |
4126 | cmd->se_tfo->get_task_tag(cmd)); | |
c66ac9db | 4127 | |
a1d8b49a | 4128 | spin_lock_irqsave(&cmd->t_state_lock, cmd_flags); |
6708bb27 | 4129 | if (!atomic_read(&cmd->transport_dev_active)) { |
a1d8b49a | 4130 | spin_unlock_irqrestore(&cmd->t_state_lock, cmd_flags); |
c66ac9db NB |
4131 | goto check_cond; |
4132 | } | |
a1d8b49a | 4133 | atomic_set(&cmd->transport_dev_active, 0); |
c66ac9db | 4134 | transport_all_task_dev_remove_state(cmd); |
a1d8b49a | 4135 | spin_unlock_irqrestore(&cmd->t_state_lock, cmd_flags); |
c66ac9db NB |
4136 | |
4137 | transport_free_dev_tasks(cmd); | |
4138 | /* | |
4139 | * The Storage engine stopped this struct se_cmd before it was | |
4140 | * send to the fabric frontend for delivery back to the | |
4141 | * Initiator Node. Return this SCSI CDB back with an | |
4142 | * CHECK_CONDITION status. | |
4143 | */ | |
4144 | check_cond: | |
4145 | transport_send_check_condition_and_sense(cmd, | |
4146 | TCM_NON_EXISTENT_LUN, 0); | |
4147 | /* | |
4148 | * If the fabric frontend is waiting for this iscsi_cmd_t to | |
4149 | * be released, notify the waiting thread now that LU has | |
4150 | * finished accessing it. | |
4151 | */ | |
a1d8b49a AG |
4152 | spin_lock_irqsave(&cmd->t_state_lock, cmd_flags); |
4153 | if (atomic_read(&cmd->transport_lun_fe_stop)) { | |
6708bb27 | 4154 | pr_debug("SE_LUN[%d] - Detected FE stop for" |
c66ac9db NB |
4155 | " struct se_cmd: %p ITT: 0x%08x\n", |
4156 | lun->unpacked_lun, | |
e3d6f909 | 4157 | cmd, cmd->se_tfo->get_task_tag(cmd)); |
c66ac9db | 4158 | |
a1d8b49a | 4159 | spin_unlock_irqrestore(&cmd->t_state_lock, |
c66ac9db NB |
4160 | cmd_flags); |
4161 | transport_cmd_check_stop(cmd, 1, 0); | |
a1d8b49a | 4162 | complete(&cmd->transport_lun_fe_stop_comp); |
c66ac9db NB |
4163 | spin_lock_irqsave(&lun->lun_cmd_lock, lun_flags); |
4164 | continue; | |
4165 | } | |
6708bb27 | 4166 | pr_debug("SE_LUN[%d] - ITT: 0x%08x finished processing\n", |
e3d6f909 | 4167 | lun->unpacked_lun, cmd->se_tfo->get_task_tag(cmd)); |
c66ac9db | 4168 | |
a1d8b49a | 4169 | spin_unlock_irqrestore(&cmd->t_state_lock, cmd_flags); |
c66ac9db NB |
4170 | spin_lock_irqsave(&lun->lun_cmd_lock, lun_flags); |
4171 | } | |
4172 | spin_unlock_irqrestore(&lun->lun_cmd_lock, lun_flags); | |
4173 | } | |
4174 | ||
4175 | static int transport_clear_lun_thread(void *p) | |
4176 | { | |
4177 | struct se_lun *lun = (struct se_lun *)p; | |
4178 | ||
4179 | __transport_clear_lun_from_sessions(lun); | |
4180 | complete(&lun->lun_shutdown_comp); | |
4181 | ||
4182 | return 0; | |
4183 | } | |
4184 | ||
4185 | int transport_clear_lun_from_sessions(struct se_lun *lun) | |
4186 | { | |
4187 | struct task_struct *kt; | |
4188 | ||
5951146d | 4189 | kt = kthread_run(transport_clear_lun_thread, lun, |
c66ac9db NB |
4190 | "tcm_cl_%u", lun->unpacked_lun); |
4191 | if (IS_ERR(kt)) { | |
6708bb27 | 4192 | pr_err("Unable to start clear_lun thread\n"); |
e3d6f909 | 4193 | return PTR_ERR(kt); |
c66ac9db NB |
4194 | } |
4195 | wait_for_completion(&lun->lun_shutdown_comp); | |
4196 | ||
4197 | return 0; | |
4198 | } | |
4199 | ||
d14921d6 NB |
4200 | /** |
4201 | * transport_wait_for_tasks - wait for completion to occur | |
4202 | * @cmd: command to wait | |
c66ac9db | 4203 | * |
d14921d6 NB |
4204 | * Called from frontend fabric context to wait for storage engine |
4205 | * to pause and/or release frontend generated struct se_cmd. | |
c66ac9db | 4206 | */ |
a17f091d | 4207 | bool transport_wait_for_tasks(struct se_cmd *cmd) |
c66ac9db NB |
4208 | { |
4209 | unsigned long flags; | |
4210 | ||
a1d8b49a | 4211 | spin_lock_irqsave(&cmd->t_state_lock, flags); |
d14921d6 NB |
4212 | if (!(cmd->se_cmd_flags & SCF_SE_LUN_CMD) && !(cmd->se_tmr_req)) { |
4213 | spin_unlock_irqrestore(&cmd->t_state_lock, flags); | |
a17f091d | 4214 | return false; |
d14921d6 NB |
4215 | } |
4216 | /* | |
4217 | * Only perform a possible wait_for_tasks if SCF_SUPPORTED_SAM_OPCODE | |
4218 | * has been set in transport_set_supported_SAM_opcode(). | |
4219 | */ | |
4220 | if (!(cmd->se_cmd_flags & SCF_SUPPORTED_SAM_OPCODE) && !cmd->se_tmr_req) { | |
4221 | spin_unlock_irqrestore(&cmd->t_state_lock, flags); | |
a17f091d | 4222 | return false; |
d14921d6 | 4223 | } |
c66ac9db NB |
4224 | /* |
4225 | * If we are already stopped due to an external event (ie: LUN shutdown) | |
4226 | * sleep until the connection can have the passed struct se_cmd back. | |
a1d8b49a | 4227 | * The cmd->transport_lun_stopped_sem will be upped by |
c66ac9db NB |
4228 | * transport_clear_lun_from_sessions() once the ConfigFS context caller |
4229 | * has completed its operation on the struct se_cmd. | |
4230 | */ | |
a1d8b49a | 4231 | if (atomic_read(&cmd->transport_lun_stop)) { |
c66ac9db | 4232 | |
6708bb27 | 4233 | pr_debug("wait_for_tasks: Stopping" |
e3d6f909 | 4234 | " wait_for_completion(&cmd->t_tasktransport_lun_fe" |
c66ac9db | 4235 | "_stop_comp); for ITT: 0x%08x\n", |
e3d6f909 | 4236 | cmd->se_tfo->get_task_tag(cmd)); |
c66ac9db NB |
4237 | /* |
4238 | * There is a special case for WRITES where a FE exception + | |
4239 | * LUN shutdown means ConfigFS context is still sleeping on | |
4240 | * transport_lun_stop_comp in transport_lun_wait_for_tasks(). | |
4241 | * We go ahead and up transport_lun_stop_comp just to be sure | |
4242 | * here. | |
4243 | */ | |
a1d8b49a AG |
4244 | spin_unlock_irqrestore(&cmd->t_state_lock, flags); |
4245 | complete(&cmd->transport_lun_stop_comp); | |
4246 | wait_for_completion(&cmd->transport_lun_fe_stop_comp); | |
4247 | spin_lock_irqsave(&cmd->t_state_lock, flags); | |
c66ac9db NB |
4248 | |
4249 | transport_all_task_dev_remove_state(cmd); | |
4250 | /* | |
4251 | * At this point, the frontend who was the originator of this | |
4252 | * struct se_cmd, now owns the structure and can be released through | |
4253 | * normal means below. | |
4254 | */ | |
6708bb27 | 4255 | pr_debug("wait_for_tasks: Stopped" |
e3d6f909 | 4256 | " wait_for_completion(&cmd->t_tasktransport_lun_fe_" |
c66ac9db | 4257 | "stop_comp); for ITT: 0x%08x\n", |
e3d6f909 | 4258 | cmd->se_tfo->get_task_tag(cmd)); |
c66ac9db | 4259 | |
a1d8b49a | 4260 | atomic_set(&cmd->transport_lun_stop, 0); |
c66ac9db | 4261 | } |
a1d8b49a | 4262 | if (!atomic_read(&cmd->t_transport_active) || |
d14921d6 NB |
4263 | atomic_read(&cmd->t_transport_aborted)) { |
4264 | spin_unlock_irqrestore(&cmd->t_state_lock, flags); | |
a17f091d | 4265 | return false; |
d14921d6 | 4266 | } |
c66ac9db | 4267 | |
a1d8b49a | 4268 | atomic_set(&cmd->t_transport_stop, 1); |
c66ac9db | 4269 | |
6708bb27 | 4270 | pr_debug("wait_for_tasks: Stopping %p ITT: 0x%08x" |
f2da9dbd CH |
4271 | " i_state: %d, t_state: %d, t_transport_stop = TRUE\n", |
4272 | cmd, cmd->se_tfo->get_task_tag(cmd), | |
4273 | cmd->se_tfo->get_cmd_state(cmd), cmd->t_state); | |
c66ac9db | 4274 | |
a1d8b49a | 4275 | spin_unlock_irqrestore(&cmd->t_state_lock, flags); |
c66ac9db | 4276 | |
5951146d | 4277 | wake_up_interruptible(&cmd->se_dev->dev_queue_obj.thread_wq); |
c66ac9db | 4278 | |
a1d8b49a | 4279 | wait_for_completion(&cmd->t_transport_stop_comp); |
c66ac9db | 4280 | |
a1d8b49a AG |
4281 | spin_lock_irqsave(&cmd->t_state_lock, flags); |
4282 | atomic_set(&cmd->t_transport_active, 0); | |
4283 | atomic_set(&cmd->t_transport_stop, 0); | |
c66ac9db | 4284 | |
6708bb27 | 4285 | pr_debug("wait_for_tasks: Stopped wait_for_compltion(" |
a1d8b49a | 4286 | "&cmd->t_transport_stop_comp) for ITT: 0x%08x\n", |
e3d6f909 | 4287 | cmd->se_tfo->get_task_tag(cmd)); |
c66ac9db | 4288 | |
d14921d6 | 4289 | spin_unlock_irqrestore(&cmd->t_state_lock, flags); |
a17f091d NB |
4290 | |
4291 | return true; | |
c66ac9db | 4292 | } |
d14921d6 | 4293 | EXPORT_SYMBOL(transport_wait_for_tasks); |
c66ac9db NB |
4294 | |
4295 | static int transport_get_sense_codes( | |
4296 | struct se_cmd *cmd, | |
4297 | u8 *asc, | |
4298 | u8 *ascq) | |
4299 | { | |
4300 | *asc = cmd->scsi_asc; | |
4301 | *ascq = cmd->scsi_ascq; | |
4302 | ||
4303 | return 0; | |
4304 | } | |
4305 | ||
4306 | static int transport_set_sense_codes( | |
4307 | struct se_cmd *cmd, | |
4308 | u8 asc, | |
4309 | u8 ascq) | |
4310 | { | |
4311 | cmd->scsi_asc = asc; | |
4312 | cmd->scsi_ascq = ascq; | |
4313 | ||
4314 | return 0; | |
4315 | } | |
4316 | ||
4317 | int transport_send_check_condition_and_sense( | |
4318 | struct se_cmd *cmd, | |
4319 | u8 reason, | |
4320 | int from_transport) | |
4321 | { | |
4322 | unsigned char *buffer = cmd->sense_buffer; | |
4323 | unsigned long flags; | |
4324 | int offset; | |
4325 | u8 asc = 0, ascq = 0; | |
4326 | ||
a1d8b49a | 4327 | spin_lock_irqsave(&cmd->t_state_lock, flags); |
c66ac9db | 4328 | if (cmd->se_cmd_flags & SCF_SENT_CHECK_CONDITION) { |
a1d8b49a | 4329 | spin_unlock_irqrestore(&cmd->t_state_lock, flags); |
c66ac9db NB |
4330 | return 0; |
4331 | } | |
4332 | cmd->se_cmd_flags |= SCF_SENT_CHECK_CONDITION; | |
a1d8b49a | 4333 | spin_unlock_irqrestore(&cmd->t_state_lock, flags); |
c66ac9db NB |
4334 | |
4335 | if (!reason && from_transport) | |
4336 | goto after_reason; | |
4337 | ||
4338 | if (!from_transport) | |
4339 | cmd->se_cmd_flags |= SCF_EMULATED_TASK_SENSE; | |
4340 | /* | |
4341 | * Data Segment and SenseLength of the fabric response PDU. | |
4342 | * | |
4343 | * TRANSPORT_SENSE_BUFFER is now set to SCSI_SENSE_BUFFERSIZE | |
4344 | * from include/scsi/scsi_cmnd.h | |
4345 | */ | |
e3d6f909 | 4346 | offset = cmd->se_tfo->set_fabric_sense_len(cmd, |
c66ac9db NB |
4347 | TRANSPORT_SENSE_BUFFER); |
4348 | /* | |
4349 | * Actual SENSE DATA, see SPC-3 7.23.2 SPC_SENSE_KEY_OFFSET uses | |
4350 | * SENSE KEY values from include/scsi/scsi.h | |
4351 | */ | |
4352 | switch (reason) { | |
4353 | case TCM_NON_EXISTENT_LUN: | |
eb39d340 NB |
4354 | /* CURRENT ERROR */ |
4355 | buffer[offset] = 0x70; | |
4356 | /* ILLEGAL REQUEST */ | |
4357 | buffer[offset+SPC_SENSE_KEY_OFFSET] = ILLEGAL_REQUEST; | |
4358 | /* LOGICAL UNIT NOT SUPPORTED */ | |
4359 | buffer[offset+SPC_ASC_KEY_OFFSET] = 0x25; | |
4360 | break; | |
c66ac9db NB |
4361 | case TCM_UNSUPPORTED_SCSI_OPCODE: |
4362 | case TCM_SECTOR_COUNT_TOO_MANY: | |
4363 | /* CURRENT ERROR */ | |
4364 | buffer[offset] = 0x70; | |
4365 | /* ILLEGAL REQUEST */ | |
4366 | buffer[offset+SPC_SENSE_KEY_OFFSET] = ILLEGAL_REQUEST; | |
4367 | /* INVALID COMMAND OPERATION CODE */ | |
4368 | buffer[offset+SPC_ASC_KEY_OFFSET] = 0x20; | |
4369 | break; | |
4370 | case TCM_UNKNOWN_MODE_PAGE: | |
4371 | /* CURRENT ERROR */ | |
4372 | buffer[offset] = 0x70; | |
4373 | /* ILLEGAL REQUEST */ | |
4374 | buffer[offset+SPC_SENSE_KEY_OFFSET] = ILLEGAL_REQUEST; | |
4375 | /* INVALID FIELD IN CDB */ | |
4376 | buffer[offset+SPC_ASC_KEY_OFFSET] = 0x24; | |
4377 | break; | |
4378 | case TCM_CHECK_CONDITION_ABORT_CMD: | |
4379 | /* CURRENT ERROR */ | |
4380 | buffer[offset] = 0x70; | |
4381 | /* ABORTED COMMAND */ | |
4382 | buffer[offset+SPC_SENSE_KEY_OFFSET] = ABORTED_COMMAND; | |
4383 | /* BUS DEVICE RESET FUNCTION OCCURRED */ | |
4384 | buffer[offset+SPC_ASC_KEY_OFFSET] = 0x29; | |
4385 | buffer[offset+SPC_ASCQ_KEY_OFFSET] = 0x03; | |
4386 | break; | |
4387 | case TCM_INCORRECT_AMOUNT_OF_DATA: | |
4388 | /* CURRENT ERROR */ | |
4389 | buffer[offset] = 0x70; | |
4390 | /* ABORTED COMMAND */ | |
4391 | buffer[offset+SPC_SENSE_KEY_OFFSET] = ABORTED_COMMAND; | |
4392 | /* WRITE ERROR */ | |
4393 | buffer[offset+SPC_ASC_KEY_OFFSET] = 0x0c; | |
4394 | /* NOT ENOUGH UNSOLICITED DATA */ | |
4395 | buffer[offset+SPC_ASCQ_KEY_OFFSET] = 0x0d; | |
4396 | break; | |
4397 | case TCM_INVALID_CDB_FIELD: | |
4398 | /* CURRENT ERROR */ | |
4399 | buffer[offset] = 0x70; | |
4400 | /* ABORTED COMMAND */ | |
4401 | buffer[offset+SPC_SENSE_KEY_OFFSET] = ABORTED_COMMAND; | |
4402 | /* INVALID FIELD IN CDB */ | |
4403 | buffer[offset+SPC_ASC_KEY_OFFSET] = 0x24; | |
4404 | break; | |
4405 | case TCM_INVALID_PARAMETER_LIST: | |
4406 | /* CURRENT ERROR */ | |
4407 | buffer[offset] = 0x70; | |
4408 | /* ABORTED COMMAND */ | |
4409 | buffer[offset+SPC_SENSE_KEY_OFFSET] = ABORTED_COMMAND; | |
4410 | /* INVALID FIELD IN PARAMETER LIST */ | |
4411 | buffer[offset+SPC_ASC_KEY_OFFSET] = 0x26; | |
4412 | break; | |
4413 | case TCM_UNEXPECTED_UNSOLICITED_DATA: | |
4414 | /* CURRENT ERROR */ | |
4415 | buffer[offset] = 0x70; | |
4416 | /* ABORTED COMMAND */ | |
4417 | buffer[offset+SPC_SENSE_KEY_OFFSET] = ABORTED_COMMAND; | |
4418 | /* WRITE ERROR */ | |
4419 | buffer[offset+SPC_ASC_KEY_OFFSET] = 0x0c; | |
4420 | /* UNEXPECTED_UNSOLICITED_DATA */ | |
4421 | buffer[offset+SPC_ASCQ_KEY_OFFSET] = 0x0c; | |
4422 | break; | |
4423 | case TCM_SERVICE_CRC_ERROR: | |
4424 | /* CURRENT ERROR */ | |
4425 | buffer[offset] = 0x70; | |
4426 | /* ABORTED COMMAND */ | |
4427 | buffer[offset+SPC_SENSE_KEY_OFFSET] = ABORTED_COMMAND; | |
4428 | /* PROTOCOL SERVICE CRC ERROR */ | |
4429 | buffer[offset+SPC_ASC_KEY_OFFSET] = 0x47; | |
4430 | /* N/A */ | |
4431 | buffer[offset+SPC_ASCQ_KEY_OFFSET] = 0x05; | |
4432 | break; | |
4433 | case TCM_SNACK_REJECTED: | |
4434 | /* CURRENT ERROR */ | |
4435 | buffer[offset] = 0x70; | |
4436 | /* ABORTED COMMAND */ | |
4437 | buffer[offset+SPC_SENSE_KEY_OFFSET] = ABORTED_COMMAND; | |
4438 | /* READ ERROR */ | |
4439 | buffer[offset+SPC_ASC_KEY_OFFSET] = 0x11; | |
4440 | /* FAILED RETRANSMISSION REQUEST */ | |
4441 | buffer[offset+SPC_ASCQ_KEY_OFFSET] = 0x13; | |
4442 | break; | |
4443 | case TCM_WRITE_PROTECTED: | |
4444 | /* CURRENT ERROR */ | |
4445 | buffer[offset] = 0x70; | |
4446 | /* DATA PROTECT */ | |
4447 | buffer[offset+SPC_SENSE_KEY_OFFSET] = DATA_PROTECT; | |
4448 | /* WRITE PROTECTED */ | |
4449 | buffer[offset+SPC_ASC_KEY_OFFSET] = 0x27; | |
4450 | break; | |
4451 | case TCM_CHECK_CONDITION_UNIT_ATTENTION: | |
4452 | /* CURRENT ERROR */ | |
4453 | buffer[offset] = 0x70; | |
4454 | /* UNIT ATTENTION */ | |
4455 | buffer[offset+SPC_SENSE_KEY_OFFSET] = UNIT_ATTENTION; | |
4456 | core_scsi3_ua_for_check_condition(cmd, &asc, &ascq); | |
4457 | buffer[offset+SPC_ASC_KEY_OFFSET] = asc; | |
4458 | buffer[offset+SPC_ASCQ_KEY_OFFSET] = ascq; | |
4459 | break; | |
4460 | case TCM_CHECK_CONDITION_NOT_READY: | |
4461 | /* CURRENT ERROR */ | |
4462 | buffer[offset] = 0x70; | |
4463 | /* Not Ready */ | |
4464 | buffer[offset+SPC_SENSE_KEY_OFFSET] = NOT_READY; | |
4465 | transport_get_sense_codes(cmd, &asc, &ascq); | |
4466 | buffer[offset+SPC_ASC_KEY_OFFSET] = asc; | |
4467 | buffer[offset+SPC_ASCQ_KEY_OFFSET] = ascq; | |
4468 | break; | |
4469 | case TCM_LOGICAL_UNIT_COMMUNICATION_FAILURE: | |
4470 | default: | |
4471 | /* CURRENT ERROR */ | |
4472 | buffer[offset] = 0x70; | |
4473 | /* ILLEGAL REQUEST */ | |
4474 | buffer[offset+SPC_SENSE_KEY_OFFSET] = ILLEGAL_REQUEST; | |
4475 | /* LOGICAL UNIT COMMUNICATION FAILURE */ | |
4476 | buffer[offset+SPC_ASC_KEY_OFFSET] = 0x80; | |
4477 | break; | |
4478 | } | |
4479 | /* | |
4480 | * This code uses linux/include/scsi/scsi.h SAM status codes! | |
4481 | */ | |
4482 | cmd->scsi_status = SAM_STAT_CHECK_CONDITION; | |
4483 | /* | |
4484 | * Automatically padded, this value is encoded in the fabric's | |
4485 | * data_length response PDU containing the SCSI defined sense data. | |
4486 | */ | |
4487 | cmd->scsi_sense_length = TRANSPORT_SENSE_BUFFER + offset; | |
4488 | ||
4489 | after_reason: | |
07bde79a | 4490 | return cmd->se_tfo->queue_status(cmd); |
c66ac9db NB |
4491 | } |
4492 | EXPORT_SYMBOL(transport_send_check_condition_and_sense); | |
4493 | ||
4494 | int transport_check_aborted_status(struct se_cmd *cmd, int send_status) | |
4495 | { | |
4496 | int ret = 0; | |
4497 | ||
a1d8b49a | 4498 | if (atomic_read(&cmd->t_transport_aborted) != 0) { |
6708bb27 | 4499 | if (!send_status || |
c66ac9db NB |
4500 | (cmd->se_cmd_flags & SCF_SENT_DELAYED_TAS)) |
4501 | return 1; | |
4502 | #if 0 | |
6708bb27 | 4503 | pr_debug("Sending delayed SAM_STAT_TASK_ABORTED" |
c66ac9db | 4504 | " status for CDB: 0x%02x ITT: 0x%08x\n", |
a1d8b49a | 4505 | cmd->t_task_cdb[0], |
e3d6f909 | 4506 | cmd->se_tfo->get_task_tag(cmd)); |
c66ac9db NB |
4507 | #endif |
4508 | cmd->se_cmd_flags |= SCF_SENT_DELAYED_TAS; | |
e3d6f909 | 4509 | cmd->se_tfo->queue_status(cmd); |
c66ac9db NB |
4510 | ret = 1; |
4511 | } | |
4512 | return ret; | |
4513 | } | |
4514 | EXPORT_SYMBOL(transport_check_aborted_status); | |
4515 | ||
4516 | void transport_send_task_abort(struct se_cmd *cmd) | |
4517 | { | |
c252f003 NB |
4518 | unsigned long flags; |
4519 | ||
4520 | spin_lock_irqsave(&cmd->t_state_lock, flags); | |
4521 | if (cmd->se_cmd_flags & SCF_SENT_CHECK_CONDITION) { | |
4522 | spin_unlock_irqrestore(&cmd->t_state_lock, flags); | |
4523 | return; | |
4524 | } | |
4525 | spin_unlock_irqrestore(&cmd->t_state_lock, flags); | |
4526 | ||
c66ac9db NB |
4527 | /* |
4528 | * If there are still expected incoming fabric WRITEs, we wait | |
4529 | * until until they have completed before sending a TASK_ABORTED | |
4530 | * response. This response with TASK_ABORTED status will be | |
4531 | * queued back to fabric module by transport_check_aborted_status(). | |
4532 | */ | |
4533 | if (cmd->data_direction == DMA_TO_DEVICE) { | |
e3d6f909 | 4534 | if (cmd->se_tfo->write_pending_status(cmd) != 0) { |
a1d8b49a | 4535 | atomic_inc(&cmd->t_transport_aborted); |
c66ac9db | 4536 | smp_mb__after_atomic_inc(); |
c66ac9db NB |
4537 | } |
4538 | } | |
4539 | cmd->scsi_status = SAM_STAT_TASK_ABORTED; | |
4540 | #if 0 | |
6708bb27 | 4541 | pr_debug("Setting SAM_STAT_TASK_ABORTED status for CDB: 0x%02x," |
a1d8b49a | 4542 | " ITT: 0x%08x\n", cmd->t_task_cdb[0], |
e3d6f909 | 4543 | cmd->se_tfo->get_task_tag(cmd)); |
c66ac9db | 4544 | #endif |
e3d6f909 | 4545 | cmd->se_tfo->queue_status(cmd); |
c66ac9db NB |
4546 | } |
4547 | ||
4548 | /* transport_generic_do_tmr(): | |
4549 | * | |
4550 | * | |
4551 | */ | |
4552 | int transport_generic_do_tmr(struct se_cmd *cmd) | |
4553 | { | |
5951146d | 4554 | struct se_device *dev = cmd->se_dev; |
c66ac9db NB |
4555 | struct se_tmr_req *tmr = cmd->se_tmr_req; |
4556 | int ret; | |
4557 | ||
4558 | switch (tmr->function) { | |
5c6cd613 | 4559 | case TMR_ABORT_TASK: |
c66ac9db NB |
4560 | tmr->response = TMR_FUNCTION_REJECTED; |
4561 | break; | |
5c6cd613 NB |
4562 | case TMR_ABORT_TASK_SET: |
4563 | case TMR_CLEAR_ACA: | |
4564 | case TMR_CLEAR_TASK_SET: | |
c66ac9db NB |
4565 | tmr->response = TMR_TASK_MGMT_FUNCTION_NOT_SUPPORTED; |
4566 | break; | |
5c6cd613 | 4567 | case TMR_LUN_RESET: |
c66ac9db NB |
4568 | ret = core_tmr_lun_reset(dev, tmr, NULL, NULL); |
4569 | tmr->response = (!ret) ? TMR_FUNCTION_COMPLETE : | |
4570 | TMR_FUNCTION_REJECTED; | |
4571 | break; | |
5c6cd613 | 4572 | case TMR_TARGET_WARM_RESET: |
c66ac9db NB |
4573 | tmr->response = TMR_FUNCTION_REJECTED; |
4574 | break; | |
5c6cd613 | 4575 | case TMR_TARGET_COLD_RESET: |
c66ac9db NB |
4576 | tmr->response = TMR_FUNCTION_REJECTED; |
4577 | break; | |
c66ac9db | 4578 | default: |
6708bb27 | 4579 | pr_err("Uknown TMR function: 0x%02x.\n", |
c66ac9db NB |
4580 | tmr->function); |
4581 | tmr->response = TMR_FUNCTION_REJECTED; | |
4582 | break; | |
4583 | } | |
4584 | ||
4585 | cmd->t_state = TRANSPORT_ISTATE_PROCESSING; | |
e3d6f909 | 4586 | cmd->se_tfo->queue_tm_rsp(cmd); |
c66ac9db | 4587 | |
b7b8bef7 | 4588 | transport_cmd_check_stop_to_fabric(cmd); |
c66ac9db NB |
4589 | return 0; |
4590 | } | |
4591 | ||
c66ac9db NB |
4592 | /* transport_processing_thread(): |
4593 | * | |
4594 | * | |
4595 | */ | |
4596 | static int transport_processing_thread(void *param) | |
4597 | { | |
5951146d | 4598 | int ret; |
c66ac9db NB |
4599 | struct se_cmd *cmd; |
4600 | struct se_device *dev = (struct se_device *) param; | |
c66ac9db | 4601 | |
c66ac9db | 4602 | while (!kthread_should_stop()) { |
e3d6f909 AG |
4603 | ret = wait_event_interruptible(dev->dev_queue_obj.thread_wq, |
4604 | atomic_read(&dev->dev_queue_obj.queue_cnt) || | |
c66ac9db NB |
4605 | kthread_should_stop()); |
4606 | if (ret < 0) | |
4607 | goto out; | |
4608 | ||
c66ac9db NB |
4609 | get_cmd: |
4610 | __transport_execute_tasks(dev); | |
4611 | ||
5951146d AG |
4612 | cmd = transport_get_cmd_from_queue(&dev->dev_queue_obj); |
4613 | if (!cmd) | |
c66ac9db NB |
4614 | continue; |
4615 | ||
5951146d | 4616 | switch (cmd->t_state) { |
680b73c5 CH |
4617 | case TRANSPORT_NEW_CMD: |
4618 | BUG(); | |
4619 | break; | |
c66ac9db | 4620 | case TRANSPORT_NEW_CMD_MAP: |
6708bb27 AG |
4621 | if (!cmd->se_tfo->new_cmd_map) { |
4622 | pr_err("cmd->se_tfo->new_cmd_map is" | |
c66ac9db NB |
4623 | " NULL for TRANSPORT_NEW_CMD_MAP\n"); |
4624 | BUG(); | |
4625 | } | |
e3d6f909 | 4626 | ret = cmd->se_tfo->new_cmd_map(cmd); |
c66ac9db | 4627 | if (ret < 0) { |
03e98c9e | 4628 | transport_generic_request_failure(cmd); |
c66ac9db NB |
4629 | break; |
4630 | } | |
c66ac9db | 4631 | ret = transport_generic_new_cmd(cmd); |
f147abb4 | 4632 | if (ret < 0) { |
03e98c9e NB |
4633 | transport_generic_request_failure(cmd); |
4634 | break; | |
c66ac9db NB |
4635 | } |
4636 | break; | |
4637 | case TRANSPORT_PROCESS_WRITE: | |
4638 | transport_generic_process_write(cmd); | |
4639 | break; | |
c66ac9db NB |
4640 | case TRANSPORT_PROCESS_TMR: |
4641 | transport_generic_do_tmr(cmd); | |
4642 | break; | |
07bde79a | 4643 | case TRANSPORT_COMPLETE_QF_WP: |
e057f533 CH |
4644 | transport_write_pending_qf(cmd); |
4645 | break; | |
4646 | case TRANSPORT_COMPLETE_QF_OK: | |
4647 | transport_complete_qf(cmd); | |
07bde79a | 4648 | break; |
c66ac9db | 4649 | default: |
f2da9dbd CH |
4650 | pr_err("Unknown t_state: %d for ITT: 0x%08x " |
4651 | "i_state: %d on SE LUN: %u\n", | |
4652 | cmd->t_state, | |
e3d6f909 AG |
4653 | cmd->se_tfo->get_task_tag(cmd), |
4654 | cmd->se_tfo->get_cmd_state(cmd), | |
4655 | cmd->se_lun->unpacked_lun); | |
c66ac9db NB |
4656 | BUG(); |
4657 | } | |
4658 | ||
4659 | goto get_cmd; | |
4660 | } | |
4661 | ||
4662 | out: | |
ce8762f6 NB |
4663 | WARN_ON(!list_empty(&dev->state_task_list)); |
4664 | WARN_ON(!list_empty(&dev->dev_queue_obj.qobj_list)); | |
c66ac9db NB |
4665 | dev->process_thread = NULL; |
4666 | return 0; | |
4667 | } |