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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 | ||
e26d99ae | 55 | #include "target_core_internal.h" |
c66ac9db | 56 | #include "target_core_alua.h" |
c66ac9db | 57 | #include "target_core_pr.h" |
c66ac9db NB |
58 | #include "target_core_ua.h" |
59 | ||
e3d6f909 | 60 | static int sub_api_initialized; |
c66ac9db | 61 | |
35e0e757 | 62 | static struct workqueue_struct *target_completion_wq; |
c66ac9db NB |
63 | static struct kmem_cache *se_sess_cache; |
64 | struct kmem_cache *se_tmr_req_cache; | |
65 | struct kmem_cache *se_ua_cache; | |
c66ac9db NB |
66 | struct kmem_cache *t10_pr_reg_cache; |
67 | struct kmem_cache *t10_alua_lu_gp_cache; | |
68 | struct kmem_cache *t10_alua_lu_gp_mem_cache; | |
69 | struct kmem_cache *t10_alua_tg_pt_gp_cache; | |
70 | struct kmem_cache *t10_alua_tg_pt_gp_mem_cache; | |
71 | ||
c66ac9db | 72 | static int transport_generic_write_pending(struct se_cmd *); |
5951146d | 73 | static int transport_processing_thread(void *param); |
c66ac9db NB |
74 | static int __transport_execute_tasks(struct se_device *dev); |
75 | static void transport_complete_task_attr(struct se_cmd *cmd); | |
07bde79a | 76 | static void transport_handle_queue_full(struct se_cmd *cmd, |
e057f533 | 77 | struct se_device *dev); |
c66ac9db | 78 | static void transport_free_dev_tasks(struct se_cmd *cmd); |
05d1c7c0 | 79 | static int transport_generic_get_mem(struct se_cmd *cmd); |
39c05f32 | 80 | static void transport_put_cmd(struct se_cmd *cmd); |
3df8d40b | 81 | static void transport_remove_cmd_from_queue(struct se_cmd *cmd); |
c66ac9db | 82 | static int transport_set_sense_codes(struct se_cmd *cmd, u8 asc, u8 ascq); |
03e98c9e | 83 | static void transport_generic_request_failure(struct se_cmd *); |
35e0e757 | 84 | static void target_complete_ok_work(struct work_struct *work); |
c66ac9db | 85 | |
e3d6f909 | 86 | int init_se_kmem_caches(void) |
c66ac9db | 87 | { |
c66ac9db NB |
88 | se_tmr_req_cache = kmem_cache_create("se_tmr_cache", |
89 | sizeof(struct se_tmr_req), __alignof__(struct se_tmr_req), | |
90 | 0, NULL); | |
6708bb27 AG |
91 | if (!se_tmr_req_cache) { |
92 | pr_err("kmem_cache_create() for struct se_tmr_req" | |
c66ac9db | 93 | " failed\n"); |
97c34f3b | 94 | goto out; |
c66ac9db NB |
95 | } |
96 | se_sess_cache = kmem_cache_create("se_sess_cache", | |
97 | sizeof(struct se_session), __alignof__(struct se_session), | |
98 | 0, NULL); | |
6708bb27 AG |
99 | if (!se_sess_cache) { |
100 | pr_err("kmem_cache_create() for struct se_session" | |
c66ac9db | 101 | " failed\n"); |
35e0e757 | 102 | goto out_free_tmr_req_cache; |
c66ac9db NB |
103 | } |
104 | se_ua_cache = kmem_cache_create("se_ua_cache", | |
105 | sizeof(struct se_ua), __alignof__(struct se_ua), | |
106 | 0, NULL); | |
6708bb27 AG |
107 | if (!se_ua_cache) { |
108 | pr_err("kmem_cache_create() for struct se_ua failed\n"); | |
35e0e757 | 109 | goto out_free_sess_cache; |
c66ac9db | 110 | } |
c66ac9db NB |
111 | t10_pr_reg_cache = kmem_cache_create("t10_pr_reg_cache", |
112 | sizeof(struct t10_pr_registration), | |
113 | __alignof__(struct t10_pr_registration), 0, NULL); | |
6708bb27 AG |
114 | if (!t10_pr_reg_cache) { |
115 | pr_err("kmem_cache_create() for struct t10_pr_registration" | |
c66ac9db | 116 | " failed\n"); |
35e0e757 | 117 | goto out_free_ua_cache; |
c66ac9db NB |
118 | } |
119 | t10_alua_lu_gp_cache = kmem_cache_create("t10_alua_lu_gp_cache", | |
120 | sizeof(struct t10_alua_lu_gp), __alignof__(struct t10_alua_lu_gp), | |
121 | 0, NULL); | |
6708bb27 AG |
122 | if (!t10_alua_lu_gp_cache) { |
123 | pr_err("kmem_cache_create() for t10_alua_lu_gp_cache" | |
c66ac9db | 124 | " failed\n"); |
35e0e757 | 125 | goto out_free_pr_reg_cache; |
c66ac9db NB |
126 | } |
127 | t10_alua_lu_gp_mem_cache = kmem_cache_create("t10_alua_lu_gp_mem_cache", | |
128 | sizeof(struct t10_alua_lu_gp_member), | |
129 | __alignof__(struct t10_alua_lu_gp_member), 0, NULL); | |
6708bb27 AG |
130 | if (!t10_alua_lu_gp_mem_cache) { |
131 | pr_err("kmem_cache_create() for t10_alua_lu_gp_mem_" | |
c66ac9db | 132 | "cache failed\n"); |
35e0e757 | 133 | goto out_free_lu_gp_cache; |
c66ac9db NB |
134 | } |
135 | t10_alua_tg_pt_gp_cache = kmem_cache_create("t10_alua_tg_pt_gp_cache", | |
136 | sizeof(struct t10_alua_tg_pt_gp), | |
137 | __alignof__(struct t10_alua_tg_pt_gp), 0, NULL); | |
6708bb27 AG |
138 | if (!t10_alua_tg_pt_gp_cache) { |
139 | pr_err("kmem_cache_create() for t10_alua_tg_pt_gp_" | |
c66ac9db | 140 | "cache failed\n"); |
35e0e757 | 141 | goto out_free_lu_gp_mem_cache; |
c66ac9db NB |
142 | } |
143 | t10_alua_tg_pt_gp_mem_cache = kmem_cache_create( | |
144 | "t10_alua_tg_pt_gp_mem_cache", | |
145 | sizeof(struct t10_alua_tg_pt_gp_member), | |
146 | __alignof__(struct t10_alua_tg_pt_gp_member), | |
147 | 0, NULL); | |
6708bb27 AG |
148 | if (!t10_alua_tg_pt_gp_mem_cache) { |
149 | pr_err("kmem_cache_create() for t10_alua_tg_pt_gp_" | |
c66ac9db | 150 | "mem_t failed\n"); |
35e0e757 | 151 | goto out_free_tg_pt_gp_cache; |
c66ac9db NB |
152 | } |
153 | ||
35e0e757 CH |
154 | target_completion_wq = alloc_workqueue("target_completion", |
155 | WQ_MEM_RECLAIM, 0); | |
156 | if (!target_completion_wq) | |
157 | goto out_free_tg_pt_gp_mem_cache; | |
158 | ||
c66ac9db | 159 | return 0; |
35e0e757 CH |
160 | |
161 | out_free_tg_pt_gp_mem_cache: | |
162 | kmem_cache_destroy(t10_alua_tg_pt_gp_mem_cache); | |
163 | out_free_tg_pt_gp_cache: | |
164 | kmem_cache_destroy(t10_alua_tg_pt_gp_cache); | |
165 | out_free_lu_gp_mem_cache: | |
166 | kmem_cache_destroy(t10_alua_lu_gp_mem_cache); | |
167 | out_free_lu_gp_cache: | |
168 | kmem_cache_destroy(t10_alua_lu_gp_cache); | |
169 | out_free_pr_reg_cache: | |
170 | kmem_cache_destroy(t10_pr_reg_cache); | |
171 | out_free_ua_cache: | |
172 | kmem_cache_destroy(se_ua_cache); | |
173 | out_free_sess_cache: | |
174 | kmem_cache_destroy(se_sess_cache); | |
175 | out_free_tmr_req_cache: | |
176 | kmem_cache_destroy(se_tmr_req_cache); | |
c66ac9db | 177 | out: |
e3d6f909 | 178 | return -ENOMEM; |
c66ac9db NB |
179 | } |
180 | ||
e3d6f909 | 181 | void release_se_kmem_caches(void) |
c66ac9db | 182 | { |
35e0e757 | 183 | destroy_workqueue(target_completion_wq); |
c66ac9db NB |
184 | kmem_cache_destroy(se_tmr_req_cache); |
185 | kmem_cache_destroy(se_sess_cache); | |
186 | kmem_cache_destroy(se_ua_cache); | |
c66ac9db NB |
187 | kmem_cache_destroy(t10_pr_reg_cache); |
188 | kmem_cache_destroy(t10_alua_lu_gp_cache); | |
189 | kmem_cache_destroy(t10_alua_lu_gp_mem_cache); | |
190 | kmem_cache_destroy(t10_alua_tg_pt_gp_cache); | |
191 | kmem_cache_destroy(t10_alua_tg_pt_gp_mem_cache); | |
c66ac9db NB |
192 | } |
193 | ||
e3d6f909 AG |
194 | /* This code ensures unique mib indexes are handed out. */ |
195 | static DEFINE_SPINLOCK(scsi_mib_index_lock); | |
196 | static u32 scsi_mib_index[SCSI_INDEX_TYPE_MAX]; | |
e89d15ee NB |
197 | |
198 | /* | |
199 | * Allocate a new row index for the entry type specified | |
200 | */ | |
201 | u32 scsi_get_new_index(scsi_index_t type) | |
202 | { | |
203 | u32 new_index; | |
204 | ||
e3d6f909 | 205 | BUG_ON((type < 0) || (type >= SCSI_INDEX_TYPE_MAX)); |
e89d15ee | 206 | |
e3d6f909 AG |
207 | spin_lock(&scsi_mib_index_lock); |
208 | new_index = ++scsi_mib_index[type]; | |
209 | spin_unlock(&scsi_mib_index_lock); | |
e89d15ee NB |
210 | |
211 | return new_index; | |
212 | } | |
213 | ||
e26d99ae | 214 | static void transport_init_queue_obj(struct se_queue_obj *qobj) |
c66ac9db NB |
215 | { |
216 | atomic_set(&qobj->queue_cnt, 0); | |
217 | INIT_LIST_HEAD(&qobj->qobj_list); | |
218 | init_waitqueue_head(&qobj->thread_wq); | |
219 | spin_lock_init(&qobj->cmd_queue_lock); | |
220 | } | |
c66ac9db | 221 | |
dbc5623e | 222 | void transport_subsystem_check_init(void) |
c66ac9db NB |
223 | { |
224 | int ret; | |
225 | ||
dbc5623e NB |
226 | if (sub_api_initialized) |
227 | return; | |
228 | ||
c66ac9db NB |
229 | ret = request_module("target_core_iblock"); |
230 | if (ret != 0) | |
6708bb27 | 231 | pr_err("Unable to load target_core_iblock\n"); |
c66ac9db NB |
232 | |
233 | ret = request_module("target_core_file"); | |
234 | if (ret != 0) | |
6708bb27 | 235 | pr_err("Unable to load target_core_file\n"); |
c66ac9db NB |
236 | |
237 | ret = request_module("target_core_pscsi"); | |
238 | if (ret != 0) | |
6708bb27 | 239 | pr_err("Unable to load target_core_pscsi\n"); |
c66ac9db NB |
240 | |
241 | ret = request_module("target_core_stgt"); | |
242 | if (ret != 0) | |
6708bb27 | 243 | pr_err("Unable to load target_core_stgt\n"); |
c66ac9db | 244 | |
e3d6f909 | 245 | sub_api_initialized = 1; |
dbc5623e | 246 | return; |
c66ac9db NB |
247 | } |
248 | ||
249 | struct se_session *transport_init_session(void) | |
250 | { | |
251 | struct se_session *se_sess; | |
252 | ||
253 | se_sess = kmem_cache_zalloc(se_sess_cache, GFP_KERNEL); | |
6708bb27 AG |
254 | if (!se_sess) { |
255 | pr_err("Unable to allocate struct se_session from" | |
c66ac9db NB |
256 | " se_sess_cache\n"); |
257 | return ERR_PTR(-ENOMEM); | |
258 | } | |
259 | INIT_LIST_HEAD(&se_sess->sess_list); | |
260 | INIT_LIST_HEAD(&se_sess->sess_acl_list); | |
a17f091d NB |
261 | INIT_LIST_HEAD(&se_sess->sess_cmd_list); |
262 | INIT_LIST_HEAD(&se_sess->sess_wait_list); | |
263 | spin_lock_init(&se_sess->sess_cmd_lock); | |
c66ac9db NB |
264 | |
265 | return se_sess; | |
266 | } | |
267 | EXPORT_SYMBOL(transport_init_session); | |
268 | ||
269 | /* | |
270 | * Called with spin_lock_bh(&struct se_portal_group->session_lock called. | |
271 | */ | |
272 | void __transport_register_session( | |
273 | struct se_portal_group *se_tpg, | |
274 | struct se_node_acl *se_nacl, | |
275 | struct se_session *se_sess, | |
276 | void *fabric_sess_ptr) | |
277 | { | |
278 | unsigned char buf[PR_REG_ISID_LEN]; | |
279 | ||
280 | se_sess->se_tpg = se_tpg; | |
281 | se_sess->fabric_sess_ptr = fabric_sess_ptr; | |
282 | /* | |
283 | * Used by struct se_node_acl's under ConfigFS to locate active se_session-t | |
284 | * | |
285 | * Only set for struct se_session's that will actually be moving I/O. | |
286 | * eg: *NOT* discovery sessions. | |
287 | */ | |
288 | if (se_nacl) { | |
289 | /* | |
290 | * If the fabric module supports an ISID based TransportID, | |
291 | * save this value in binary from the fabric I_T Nexus now. | |
292 | */ | |
e3d6f909 | 293 | if (se_tpg->se_tpg_tfo->sess_get_initiator_sid != NULL) { |
c66ac9db | 294 | memset(&buf[0], 0, PR_REG_ISID_LEN); |
e3d6f909 | 295 | se_tpg->se_tpg_tfo->sess_get_initiator_sid(se_sess, |
c66ac9db NB |
296 | &buf[0], PR_REG_ISID_LEN); |
297 | se_sess->sess_bin_isid = get_unaligned_be64(&buf[0]); | |
298 | } | |
299 | spin_lock_irq(&se_nacl->nacl_sess_lock); | |
300 | /* | |
301 | * The se_nacl->nacl_sess pointer will be set to the | |
302 | * last active I_T Nexus for each struct se_node_acl. | |
303 | */ | |
304 | se_nacl->nacl_sess = se_sess; | |
305 | ||
306 | list_add_tail(&se_sess->sess_acl_list, | |
307 | &se_nacl->acl_sess_list); | |
308 | spin_unlock_irq(&se_nacl->nacl_sess_lock); | |
309 | } | |
310 | list_add_tail(&se_sess->sess_list, &se_tpg->tpg_sess_list); | |
311 | ||
6708bb27 | 312 | pr_debug("TARGET_CORE[%s]: Registered fabric_sess_ptr: %p\n", |
e3d6f909 | 313 | se_tpg->se_tpg_tfo->get_fabric_name(), se_sess->fabric_sess_ptr); |
c66ac9db NB |
314 | } |
315 | EXPORT_SYMBOL(__transport_register_session); | |
316 | ||
317 | void transport_register_session( | |
318 | struct se_portal_group *se_tpg, | |
319 | struct se_node_acl *se_nacl, | |
320 | struct se_session *se_sess, | |
321 | void *fabric_sess_ptr) | |
322 | { | |
323 | spin_lock_bh(&se_tpg->session_lock); | |
324 | __transport_register_session(se_tpg, se_nacl, se_sess, fabric_sess_ptr); | |
325 | spin_unlock_bh(&se_tpg->session_lock); | |
326 | } | |
327 | EXPORT_SYMBOL(transport_register_session); | |
328 | ||
329 | void transport_deregister_session_configfs(struct se_session *se_sess) | |
330 | { | |
331 | struct se_node_acl *se_nacl; | |
23388864 | 332 | unsigned long flags; |
c66ac9db NB |
333 | /* |
334 | * Used by struct se_node_acl's under ConfigFS to locate active struct se_session | |
335 | */ | |
336 | se_nacl = se_sess->se_node_acl; | |
6708bb27 | 337 | if (se_nacl) { |
23388864 | 338 | spin_lock_irqsave(&se_nacl->nacl_sess_lock, flags); |
c66ac9db NB |
339 | list_del(&se_sess->sess_acl_list); |
340 | /* | |
341 | * If the session list is empty, then clear the pointer. | |
342 | * Otherwise, set the struct se_session pointer from the tail | |
343 | * element of the per struct se_node_acl active session list. | |
344 | */ | |
345 | if (list_empty(&se_nacl->acl_sess_list)) | |
346 | se_nacl->nacl_sess = NULL; | |
347 | else { | |
348 | se_nacl->nacl_sess = container_of( | |
349 | se_nacl->acl_sess_list.prev, | |
350 | struct se_session, sess_acl_list); | |
351 | } | |
23388864 | 352 | spin_unlock_irqrestore(&se_nacl->nacl_sess_lock, flags); |
c66ac9db NB |
353 | } |
354 | } | |
355 | EXPORT_SYMBOL(transport_deregister_session_configfs); | |
356 | ||
357 | void transport_free_session(struct se_session *se_sess) | |
358 | { | |
359 | kmem_cache_free(se_sess_cache, se_sess); | |
360 | } | |
361 | EXPORT_SYMBOL(transport_free_session); | |
362 | ||
363 | void transport_deregister_session(struct se_session *se_sess) | |
364 | { | |
365 | struct se_portal_group *se_tpg = se_sess->se_tpg; | |
366 | struct se_node_acl *se_nacl; | |
e63a8e19 | 367 | unsigned long flags; |
c66ac9db | 368 | |
6708bb27 | 369 | if (!se_tpg) { |
c66ac9db NB |
370 | transport_free_session(se_sess); |
371 | return; | |
372 | } | |
c66ac9db | 373 | |
e63a8e19 | 374 | spin_lock_irqsave(&se_tpg->session_lock, flags); |
c66ac9db NB |
375 | list_del(&se_sess->sess_list); |
376 | se_sess->se_tpg = NULL; | |
377 | se_sess->fabric_sess_ptr = NULL; | |
e63a8e19 | 378 | spin_unlock_irqrestore(&se_tpg->session_lock, flags); |
c66ac9db NB |
379 | |
380 | /* | |
381 | * Determine if we need to do extra work for this initiator node's | |
382 | * struct se_node_acl if it had been previously dynamically generated. | |
383 | */ | |
384 | se_nacl = se_sess->se_node_acl; | |
6708bb27 | 385 | if (se_nacl) { |
e63a8e19 | 386 | spin_lock_irqsave(&se_tpg->acl_node_lock, flags); |
c66ac9db | 387 | if (se_nacl->dynamic_node_acl) { |
6708bb27 AG |
388 | if (!se_tpg->se_tpg_tfo->tpg_check_demo_mode_cache( |
389 | se_tpg)) { | |
c66ac9db NB |
390 | list_del(&se_nacl->acl_list); |
391 | se_tpg->num_node_acls--; | |
e63a8e19 | 392 | spin_unlock_irqrestore(&se_tpg->acl_node_lock, flags); |
c66ac9db NB |
393 | |
394 | core_tpg_wait_for_nacl_pr_ref(se_nacl); | |
c66ac9db | 395 | core_free_device_list_for_node(se_nacl, se_tpg); |
e3d6f909 | 396 | se_tpg->se_tpg_tfo->tpg_release_fabric_acl(se_tpg, |
c66ac9db | 397 | se_nacl); |
e63a8e19 | 398 | spin_lock_irqsave(&se_tpg->acl_node_lock, flags); |
c66ac9db NB |
399 | } |
400 | } | |
e63a8e19 | 401 | spin_unlock_irqrestore(&se_tpg->acl_node_lock, flags); |
c66ac9db NB |
402 | } |
403 | ||
404 | transport_free_session(se_sess); | |
405 | ||
6708bb27 | 406 | pr_debug("TARGET_CORE[%s]: Deregistered fabric_sess\n", |
e3d6f909 | 407 | se_tpg->se_tpg_tfo->get_fabric_name()); |
c66ac9db NB |
408 | } |
409 | EXPORT_SYMBOL(transport_deregister_session); | |
410 | ||
411 | /* | |
a1d8b49a | 412 | * Called with cmd->t_state_lock held. |
c66ac9db NB |
413 | */ |
414 | static void transport_all_task_dev_remove_state(struct se_cmd *cmd) | |
415 | { | |
42bf829e | 416 | struct se_device *dev = cmd->se_dev; |
c66ac9db NB |
417 | struct se_task *task; |
418 | unsigned long flags; | |
419 | ||
42bf829e CH |
420 | if (!dev) |
421 | return; | |
c66ac9db | 422 | |
42bf829e | 423 | list_for_each_entry(task, &cmd->t_task_list, t_list) { |
6c76bf95 | 424 | if (task->task_flags & TF_ACTIVE) |
c66ac9db NB |
425 | continue; |
426 | ||
6708bb27 | 427 | if (!atomic_read(&task->task_state_active)) |
c66ac9db NB |
428 | continue; |
429 | ||
430 | spin_lock_irqsave(&dev->execute_task_lock, flags); | |
431 | list_del(&task->t_state_list); | |
6708bb27 AG |
432 | pr_debug("Removed ITT: 0x%08x dev: %p task[%p]\n", |
433 | cmd->se_tfo->get_task_tag(cmd), dev, task); | |
c66ac9db NB |
434 | spin_unlock_irqrestore(&dev->execute_task_lock, flags); |
435 | ||
436 | atomic_set(&task->task_state_active, 0); | |
a1d8b49a | 437 | atomic_dec(&cmd->t_task_cdbs_ex_left); |
c66ac9db NB |
438 | } |
439 | } | |
440 | ||
441 | /* transport_cmd_check_stop(): | |
442 | * | |
443 | * 'transport_off = 1' determines if t_transport_active should be cleared. | |
444 | * 'transport_off = 2' determines if task_dev_state should be removed. | |
445 | * | |
446 | * A non-zero u8 t_state sets cmd->t_state. | |
447 | * Returns 1 when command is stopped, else 0. | |
448 | */ | |
449 | static int transport_cmd_check_stop( | |
450 | struct se_cmd *cmd, | |
451 | int transport_off, | |
452 | u8 t_state) | |
453 | { | |
454 | unsigned long flags; | |
455 | ||
a1d8b49a | 456 | spin_lock_irqsave(&cmd->t_state_lock, flags); |
c66ac9db NB |
457 | /* |
458 | * Determine if IOCTL context caller in requesting the stopping of this | |
459 | * command for LUN shutdown purposes. | |
460 | */ | |
a1d8b49a | 461 | if (atomic_read(&cmd->transport_lun_stop)) { |
6708bb27 | 462 | pr_debug("%s:%d atomic_read(&cmd->transport_lun_stop)" |
c66ac9db | 463 | " == TRUE for ITT: 0x%08x\n", __func__, __LINE__, |
e3d6f909 | 464 | cmd->se_tfo->get_task_tag(cmd)); |
c66ac9db | 465 | |
a1d8b49a | 466 | atomic_set(&cmd->t_transport_active, 0); |
c66ac9db NB |
467 | if (transport_off == 2) |
468 | transport_all_task_dev_remove_state(cmd); | |
a1d8b49a | 469 | spin_unlock_irqrestore(&cmd->t_state_lock, flags); |
c66ac9db | 470 | |
a1d8b49a | 471 | complete(&cmd->transport_lun_stop_comp); |
c66ac9db NB |
472 | return 1; |
473 | } | |
474 | /* | |
475 | * Determine if frontend context caller is requesting the stopping of | |
e3d6f909 | 476 | * this command for frontend exceptions. |
c66ac9db | 477 | */ |
a1d8b49a | 478 | if (atomic_read(&cmd->t_transport_stop)) { |
6708bb27 | 479 | pr_debug("%s:%d atomic_read(&cmd->t_transport_stop) ==" |
c66ac9db | 480 | " TRUE for ITT: 0x%08x\n", __func__, __LINE__, |
e3d6f909 | 481 | cmd->se_tfo->get_task_tag(cmd)); |
c66ac9db | 482 | |
c66ac9db NB |
483 | if (transport_off == 2) |
484 | transport_all_task_dev_remove_state(cmd); | |
485 | ||
486 | /* | |
487 | * Clear struct se_cmd->se_lun before the transport_off == 2 handoff | |
488 | * to FE. | |
489 | */ | |
490 | if (transport_off == 2) | |
491 | cmd->se_lun = NULL; | |
a1d8b49a | 492 | spin_unlock_irqrestore(&cmd->t_state_lock, flags); |
c66ac9db | 493 | |
a1d8b49a | 494 | complete(&cmd->t_transport_stop_comp); |
c66ac9db NB |
495 | return 1; |
496 | } | |
497 | if (transport_off) { | |
a1d8b49a | 498 | atomic_set(&cmd->t_transport_active, 0); |
c66ac9db NB |
499 | if (transport_off == 2) { |
500 | transport_all_task_dev_remove_state(cmd); | |
501 | /* | |
502 | * Clear struct se_cmd->se_lun before the transport_off == 2 | |
503 | * handoff to fabric module. | |
504 | */ | |
505 | cmd->se_lun = NULL; | |
506 | /* | |
507 | * Some fabric modules like tcm_loop can release | |
25985edc | 508 | * their internally allocated I/O reference now and |
c66ac9db | 509 | * struct se_cmd now. |
88dd9e26 NB |
510 | * |
511 | * Fabric modules are expected to return '1' here if the | |
512 | * se_cmd being passed is released at this point, | |
513 | * or zero if not being released. | |
c66ac9db | 514 | */ |
e3d6f909 | 515 | if (cmd->se_tfo->check_stop_free != NULL) { |
c66ac9db | 516 | spin_unlock_irqrestore( |
a1d8b49a | 517 | &cmd->t_state_lock, flags); |
c66ac9db | 518 | |
88dd9e26 | 519 | return cmd->se_tfo->check_stop_free(cmd); |
c66ac9db NB |
520 | } |
521 | } | |
a1d8b49a | 522 | spin_unlock_irqrestore(&cmd->t_state_lock, flags); |
c66ac9db NB |
523 | |
524 | return 0; | |
525 | } else if (t_state) | |
526 | cmd->t_state = t_state; | |
a1d8b49a | 527 | spin_unlock_irqrestore(&cmd->t_state_lock, flags); |
c66ac9db NB |
528 | |
529 | return 0; | |
530 | } | |
531 | ||
532 | static int transport_cmd_check_stop_to_fabric(struct se_cmd *cmd) | |
533 | { | |
534 | return transport_cmd_check_stop(cmd, 2, 0); | |
535 | } | |
536 | ||
537 | static void transport_lun_remove_cmd(struct se_cmd *cmd) | |
538 | { | |
e3d6f909 | 539 | struct se_lun *lun = cmd->se_lun; |
c66ac9db NB |
540 | unsigned long flags; |
541 | ||
542 | if (!lun) | |
543 | return; | |
544 | ||
a1d8b49a | 545 | spin_lock_irqsave(&cmd->t_state_lock, flags); |
6708bb27 | 546 | if (!atomic_read(&cmd->transport_dev_active)) { |
a1d8b49a | 547 | spin_unlock_irqrestore(&cmd->t_state_lock, flags); |
c66ac9db NB |
548 | goto check_lun; |
549 | } | |
a1d8b49a | 550 | atomic_set(&cmd->transport_dev_active, 0); |
c66ac9db | 551 | transport_all_task_dev_remove_state(cmd); |
a1d8b49a | 552 | spin_unlock_irqrestore(&cmd->t_state_lock, flags); |
c66ac9db | 553 | |
c66ac9db NB |
554 | |
555 | check_lun: | |
556 | spin_lock_irqsave(&lun->lun_cmd_lock, flags); | |
a1d8b49a | 557 | if (atomic_read(&cmd->transport_lun_active)) { |
5951146d | 558 | list_del(&cmd->se_lun_node); |
a1d8b49a | 559 | atomic_set(&cmd->transport_lun_active, 0); |
c66ac9db | 560 | #if 0 |
6708bb27 | 561 | pr_debug("Removed ITT: 0x%08x from LUN LIST[%d]\n" |
e3d6f909 | 562 | cmd->se_tfo->get_task_tag(cmd), lun->unpacked_lun); |
c66ac9db NB |
563 | #endif |
564 | } | |
565 | spin_unlock_irqrestore(&lun->lun_cmd_lock, flags); | |
566 | } | |
567 | ||
568 | void transport_cmd_finish_abort(struct se_cmd *cmd, int remove) | |
569 | { | |
8dc52b54 NB |
570 | if (!cmd->se_tmr_req) |
571 | transport_lun_remove_cmd(cmd); | |
c66ac9db NB |
572 | |
573 | if (transport_cmd_check_stop_to_fabric(cmd)) | |
574 | return; | |
77039d1e | 575 | if (remove) { |
3df8d40b | 576 | transport_remove_cmd_from_queue(cmd); |
e6a2573f | 577 | transport_put_cmd(cmd); |
77039d1e | 578 | } |
c66ac9db NB |
579 | } |
580 | ||
f7a5cc0b CH |
581 | static void transport_add_cmd_to_queue(struct se_cmd *cmd, int t_state, |
582 | bool at_head) | |
c66ac9db NB |
583 | { |
584 | struct se_device *dev = cmd->se_dev; | |
e3d6f909 | 585 | struct se_queue_obj *qobj = &dev->dev_queue_obj; |
c66ac9db NB |
586 | unsigned long flags; |
587 | ||
c66ac9db | 588 | if (t_state) { |
a1d8b49a | 589 | spin_lock_irqsave(&cmd->t_state_lock, flags); |
c66ac9db | 590 | cmd->t_state = t_state; |
a1d8b49a AG |
591 | atomic_set(&cmd->t_transport_active, 1); |
592 | spin_unlock_irqrestore(&cmd->t_state_lock, flags); | |
c66ac9db NB |
593 | } |
594 | ||
595 | spin_lock_irqsave(&qobj->cmd_queue_lock, flags); | |
79a7fef2 RD |
596 | |
597 | /* If the cmd is already on the list, remove it before we add it */ | |
598 | if (!list_empty(&cmd->se_queue_node)) | |
599 | list_del(&cmd->se_queue_node); | |
600 | else | |
601 | atomic_inc(&qobj->queue_cnt); | |
602 | ||
f7a5cc0b | 603 | if (at_head) |
07bde79a | 604 | list_add(&cmd->se_queue_node, &qobj->qobj_list); |
f7a5cc0b | 605 | else |
07bde79a | 606 | list_add_tail(&cmd->se_queue_node, &qobj->qobj_list); |
79a7fef2 | 607 | atomic_set(&cmd->t_transport_queue_active, 1); |
c66ac9db NB |
608 | spin_unlock_irqrestore(&qobj->cmd_queue_lock, flags); |
609 | ||
c66ac9db | 610 | wake_up_interruptible(&qobj->thread_wq); |
c66ac9db NB |
611 | } |
612 | ||
5951146d AG |
613 | static struct se_cmd * |
614 | transport_get_cmd_from_queue(struct se_queue_obj *qobj) | |
c66ac9db | 615 | { |
5951146d | 616 | struct se_cmd *cmd; |
c66ac9db NB |
617 | unsigned long flags; |
618 | ||
619 | spin_lock_irqsave(&qobj->cmd_queue_lock, flags); | |
620 | if (list_empty(&qobj->qobj_list)) { | |
621 | spin_unlock_irqrestore(&qobj->cmd_queue_lock, flags); | |
622 | return NULL; | |
623 | } | |
5951146d | 624 | cmd = list_first_entry(&qobj->qobj_list, struct se_cmd, se_queue_node); |
c66ac9db | 625 | |
79a7fef2 | 626 | atomic_set(&cmd->t_transport_queue_active, 0); |
c66ac9db | 627 | |
79a7fef2 | 628 | list_del_init(&cmd->se_queue_node); |
c66ac9db NB |
629 | atomic_dec(&qobj->queue_cnt); |
630 | spin_unlock_irqrestore(&qobj->cmd_queue_lock, flags); | |
631 | ||
5951146d | 632 | return cmd; |
c66ac9db NB |
633 | } |
634 | ||
3df8d40b | 635 | static void transport_remove_cmd_from_queue(struct se_cmd *cmd) |
c66ac9db | 636 | { |
3df8d40b | 637 | struct se_queue_obj *qobj = &cmd->se_dev->dev_queue_obj; |
c66ac9db NB |
638 | unsigned long flags; |
639 | ||
640 | spin_lock_irqsave(&qobj->cmd_queue_lock, flags); | |
6708bb27 | 641 | if (!atomic_read(&cmd->t_transport_queue_active)) { |
c66ac9db NB |
642 | spin_unlock_irqrestore(&qobj->cmd_queue_lock, flags); |
643 | return; | |
644 | } | |
79a7fef2 RD |
645 | atomic_set(&cmd->t_transport_queue_active, 0); |
646 | atomic_dec(&qobj->queue_cnt); | |
647 | list_del_init(&cmd->se_queue_node); | |
c66ac9db NB |
648 | spin_unlock_irqrestore(&qobj->cmd_queue_lock, flags); |
649 | ||
a1d8b49a | 650 | if (atomic_read(&cmd->t_transport_queue_active)) { |
6708bb27 | 651 | pr_err("ITT: 0x%08x t_transport_queue_active: %d\n", |
e3d6f909 | 652 | cmd->se_tfo->get_task_tag(cmd), |
a1d8b49a | 653 | atomic_read(&cmd->t_transport_queue_active)); |
c66ac9db NB |
654 | } |
655 | } | |
656 | ||
657 | /* | |
658 | * Completion function used by TCM subsystem plugins (such as FILEIO) | |
659 | * for queueing up response from struct se_subsystem_api->do_task() | |
660 | */ | |
661 | void transport_complete_sync_cache(struct se_cmd *cmd, int good) | |
662 | { | |
a1d8b49a | 663 | struct se_task *task = list_entry(cmd->t_task_list.next, |
c66ac9db NB |
664 | struct se_task, t_list); |
665 | ||
666 | if (good) { | |
667 | cmd->scsi_status = SAM_STAT_GOOD; | |
668 | task->task_scsi_status = GOOD; | |
669 | } else { | |
670 | task->task_scsi_status = SAM_STAT_CHECK_CONDITION; | |
03e98c9e NB |
671 | task->task_se_cmd->scsi_sense_reason = |
672 | TCM_LOGICAL_UNIT_COMMUNICATION_FAILURE; | |
673 | ||
c66ac9db NB |
674 | } |
675 | ||
676 | transport_complete_task(task, good); | |
677 | } | |
678 | EXPORT_SYMBOL(transport_complete_sync_cache); | |
679 | ||
35e0e757 CH |
680 | static void target_complete_failure_work(struct work_struct *work) |
681 | { | |
682 | struct se_cmd *cmd = container_of(work, struct se_cmd, work); | |
683 | ||
03e98c9e | 684 | transport_generic_request_failure(cmd); |
35e0e757 CH |
685 | } |
686 | ||
c66ac9db NB |
687 | /* transport_complete_task(): |
688 | * | |
689 | * Called from interrupt and non interrupt context depending | |
690 | * on the transport plugin. | |
691 | */ | |
692 | void transport_complete_task(struct se_task *task, int success) | |
693 | { | |
e3d6f909 | 694 | struct se_cmd *cmd = task->task_se_cmd; |
42bf829e | 695 | struct se_device *dev = cmd->se_dev; |
c66ac9db NB |
696 | unsigned long flags; |
697 | #if 0 | |
6708bb27 | 698 | pr_debug("task: %p CDB: 0x%02x obj_ptr: %p\n", task, |
a1d8b49a | 699 | cmd->t_task_cdb[0], dev); |
c66ac9db | 700 | #endif |
e3d6f909 | 701 | if (dev) |
c66ac9db | 702 | atomic_inc(&dev->depth_left); |
c66ac9db | 703 | |
a1d8b49a | 704 | spin_lock_irqsave(&cmd->t_state_lock, flags); |
6c76bf95 | 705 | task->task_flags &= ~TF_ACTIVE; |
c66ac9db NB |
706 | |
707 | /* | |
708 | * See if any sense data exists, if so set the TASK_SENSE flag. | |
709 | * Also check for any other post completion work that needs to be | |
710 | * done by the plugins. | |
711 | */ | |
712 | if (dev && dev->transport->transport_complete) { | |
713 | if (dev->transport->transport_complete(task) != 0) { | |
714 | cmd->se_cmd_flags |= SCF_TRANSPORT_TASK_SENSE; | |
715 | task->task_sense = 1; | |
716 | success = 1; | |
717 | } | |
718 | } | |
719 | ||
720 | /* | |
721 | * See if we are waiting for outstanding struct se_task | |
722 | * to complete for an exception condition | |
723 | */ | |
6c76bf95 | 724 | if (task->task_flags & TF_REQUEST_STOP) { |
a1d8b49a | 725 | spin_unlock_irqrestore(&cmd->t_state_lock, flags); |
c66ac9db NB |
726 | complete(&task->task_stop_comp); |
727 | return; | |
728 | } | |
2235007c CH |
729 | |
730 | if (!success) | |
731 | cmd->t_tasks_failed = 1; | |
732 | ||
c66ac9db NB |
733 | /* |
734 | * Decrement the outstanding t_task_cdbs_left count. The last | |
735 | * struct se_task from struct se_cmd will complete itself into the | |
736 | * device queue depending upon int success. | |
737 | */ | |
6708bb27 | 738 | if (!atomic_dec_and_test(&cmd->t_task_cdbs_left)) { |
a1d8b49a | 739 | spin_unlock_irqrestore(&cmd->t_state_lock, flags); |
c66ac9db NB |
740 | return; |
741 | } | |
742 | ||
2235007c | 743 | if (cmd->t_tasks_failed) { |
c66ac9db NB |
744 | if (!task->task_error_status) { |
745 | task->task_error_status = | |
03e98c9e NB |
746 | TCM_LOGICAL_UNIT_COMMUNICATION_FAILURE; |
747 | cmd->scsi_sense_reason = | |
748 | TCM_LOGICAL_UNIT_COMMUNICATION_FAILURE; | |
c66ac9db | 749 | } |
03e98c9e | 750 | |
35e0e757 | 751 | INIT_WORK(&cmd->work, target_complete_failure_work); |
c66ac9db | 752 | } else { |
a1d8b49a | 753 | atomic_set(&cmd->t_transport_complete, 1); |
35e0e757 | 754 | INIT_WORK(&cmd->work, target_complete_ok_work); |
c66ac9db | 755 | } |
35e0e757 | 756 | |
35e0e757 CH |
757 | cmd->t_state = TRANSPORT_COMPLETE; |
758 | atomic_set(&cmd->t_transport_active, 1); | |
a1d8b49a | 759 | spin_unlock_irqrestore(&cmd->t_state_lock, flags); |
c66ac9db | 760 | |
35e0e757 | 761 | queue_work(target_completion_wq, &cmd->work); |
c66ac9db NB |
762 | } |
763 | EXPORT_SYMBOL(transport_complete_task); | |
764 | ||
765 | /* | |
766 | * Called by transport_add_tasks_from_cmd() once a struct se_cmd's | |
767 | * struct se_task list are ready to be added to the active execution list | |
768 | * struct se_device | |
769 | ||
770 | * Called with se_dev_t->execute_task_lock called. | |
771 | */ | |
772 | static inline int transport_add_task_check_sam_attr( | |
773 | struct se_task *task, | |
774 | struct se_task *task_prev, | |
775 | struct se_device *dev) | |
776 | { | |
777 | /* | |
778 | * No SAM Task attribute emulation enabled, add to tail of | |
779 | * execution queue | |
780 | */ | |
781 | if (dev->dev_task_attr_type != SAM_TASK_ATTR_EMULATED) { | |
782 | list_add_tail(&task->t_execute_list, &dev->execute_task_list); | |
783 | return 0; | |
784 | } | |
785 | /* | |
786 | * HEAD_OF_QUEUE attribute for received CDB, which means | |
787 | * the first task that is associated with a struct se_cmd goes to | |
788 | * head of the struct se_device->execute_task_list, and task_prev | |
789 | * after that for each subsequent task | |
790 | */ | |
e66ecd50 | 791 | if (task->task_se_cmd->sam_task_attr == MSG_HEAD_TAG) { |
c66ac9db NB |
792 | list_add(&task->t_execute_list, |
793 | (task_prev != NULL) ? | |
794 | &task_prev->t_execute_list : | |
795 | &dev->execute_task_list); | |
796 | ||
6708bb27 | 797 | pr_debug("Set HEAD_OF_QUEUE for task CDB: 0x%02x" |
c66ac9db | 798 | " in execution queue\n", |
6708bb27 | 799 | task->task_se_cmd->t_task_cdb[0]); |
c66ac9db NB |
800 | return 1; |
801 | } | |
802 | /* | |
803 | * For ORDERED, SIMPLE or UNTAGGED attribute tasks once they have been | |
804 | * transitioned from Dermant -> Active state, and are added to the end | |
805 | * of the struct se_device->execute_task_list | |
806 | */ | |
807 | list_add_tail(&task->t_execute_list, &dev->execute_task_list); | |
808 | return 0; | |
809 | } | |
810 | ||
811 | /* __transport_add_task_to_execute_queue(): | |
812 | * | |
813 | * Called with se_dev_t->execute_task_lock called. | |
814 | */ | |
815 | static void __transport_add_task_to_execute_queue( | |
816 | struct se_task *task, | |
817 | struct se_task *task_prev, | |
818 | struct se_device *dev) | |
819 | { | |
820 | int head_of_queue; | |
821 | ||
822 | head_of_queue = transport_add_task_check_sam_attr(task, task_prev, dev); | |
823 | atomic_inc(&dev->execute_tasks); | |
824 | ||
825 | if (atomic_read(&task->task_state_active)) | |
826 | return; | |
827 | /* | |
828 | * Determine if this task needs to go to HEAD_OF_QUEUE for the | |
829 | * state list as well. Running with SAM Task Attribute emulation | |
830 | * will always return head_of_queue == 0 here | |
831 | */ | |
832 | if (head_of_queue) | |
833 | list_add(&task->t_state_list, (task_prev) ? | |
834 | &task_prev->t_state_list : | |
835 | &dev->state_task_list); | |
836 | else | |
837 | list_add_tail(&task->t_state_list, &dev->state_task_list); | |
838 | ||
839 | atomic_set(&task->task_state_active, 1); | |
840 | ||
6708bb27 | 841 | pr_debug("Added ITT: 0x%08x task[%p] to dev: %p\n", |
e3d6f909 | 842 | task->task_se_cmd->se_tfo->get_task_tag(task->task_se_cmd), |
c66ac9db NB |
843 | task, dev); |
844 | } | |
845 | ||
846 | static void transport_add_tasks_to_state_queue(struct se_cmd *cmd) | |
847 | { | |
42bf829e | 848 | struct se_device *dev = cmd->se_dev; |
c66ac9db NB |
849 | struct se_task *task; |
850 | unsigned long flags; | |
851 | ||
a1d8b49a AG |
852 | spin_lock_irqsave(&cmd->t_state_lock, flags); |
853 | list_for_each_entry(task, &cmd->t_task_list, t_list) { | |
c66ac9db NB |
854 | if (atomic_read(&task->task_state_active)) |
855 | continue; | |
856 | ||
857 | spin_lock(&dev->execute_task_lock); | |
858 | list_add_tail(&task->t_state_list, &dev->state_task_list); | |
859 | atomic_set(&task->task_state_active, 1); | |
860 | ||
6708bb27 AG |
861 | pr_debug("Added ITT: 0x%08x task[%p] to dev: %p\n", |
862 | task->task_se_cmd->se_tfo->get_task_tag( | |
c66ac9db NB |
863 | task->task_se_cmd), task, dev); |
864 | ||
865 | spin_unlock(&dev->execute_task_lock); | |
866 | } | |
a1d8b49a | 867 | spin_unlock_irqrestore(&cmd->t_state_lock, flags); |
c66ac9db NB |
868 | } |
869 | ||
870 | static void transport_add_tasks_from_cmd(struct se_cmd *cmd) | |
871 | { | |
5951146d | 872 | struct se_device *dev = cmd->se_dev; |
c66ac9db NB |
873 | struct se_task *task, *task_prev = NULL; |
874 | unsigned long flags; | |
875 | ||
876 | spin_lock_irqsave(&dev->execute_task_lock, flags); | |
a1d8b49a | 877 | list_for_each_entry(task, &cmd->t_task_list, t_list) { |
04629b7b | 878 | if (!list_empty(&task->t_execute_list)) |
c66ac9db NB |
879 | continue; |
880 | /* | |
881 | * __transport_add_task_to_execute_queue() handles the | |
882 | * SAM Task Attribute emulation if enabled | |
883 | */ | |
884 | __transport_add_task_to_execute_queue(task, task_prev, dev); | |
c66ac9db NB |
885 | task_prev = task; |
886 | } | |
887 | spin_unlock_irqrestore(&dev->execute_task_lock, flags); | |
c66ac9db NB |
888 | } |
889 | ||
04629b7b CH |
890 | void __transport_remove_task_from_execute_queue(struct se_task *task, |
891 | struct se_device *dev) | |
892 | { | |
893 | list_del_init(&task->t_execute_list); | |
894 | atomic_dec(&dev->execute_tasks); | |
895 | } | |
896 | ||
e26d99ae | 897 | static void transport_remove_task_from_execute_queue( |
c66ac9db NB |
898 | struct se_task *task, |
899 | struct se_device *dev) | |
900 | { | |
901 | unsigned long flags; | |
902 | ||
04629b7b | 903 | if (WARN_ON(list_empty(&task->t_execute_list))) |
af57c3ac | 904 | return; |
af57c3ac | 905 | |
c66ac9db | 906 | spin_lock_irqsave(&dev->execute_task_lock, flags); |
04629b7b | 907 | __transport_remove_task_from_execute_queue(task, dev); |
c66ac9db NB |
908 | spin_unlock_irqrestore(&dev->execute_task_lock, flags); |
909 | } | |
910 | ||
07bde79a | 911 | /* |
f147abb4 | 912 | * Handle QUEUE_FULL / -EAGAIN and -ENOMEM status |
07bde79a NB |
913 | */ |
914 | ||
915 | static void target_qf_do_work(struct work_struct *work) | |
916 | { | |
917 | struct se_device *dev = container_of(work, struct se_device, | |
918 | qf_work_queue); | |
bcac364a | 919 | LIST_HEAD(qf_cmd_list); |
07bde79a NB |
920 | struct se_cmd *cmd, *cmd_tmp; |
921 | ||
922 | spin_lock_irq(&dev->qf_cmd_lock); | |
bcac364a RD |
923 | list_splice_init(&dev->qf_cmd_list, &qf_cmd_list); |
924 | spin_unlock_irq(&dev->qf_cmd_lock); | |
07bde79a | 925 | |
bcac364a | 926 | list_for_each_entry_safe(cmd, cmd_tmp, &qf_cmd_list, se_qf_node) { |
07bde79a NB |
927 | list_del(&cmd->se_qf_node); |
928 | atomic_dec(&dev->dev_qf_count); | |
929 | smp_mb__after_atomic_dec(); | |
07bde79a | 930 | |
6708bb27 | 931 | pr_debug("Processing %s cmd: %p QUEUE_FULL in work queue" |
07bde79a | 932 | " context: %s\n", cmd->se_tfo->get_fabric_name(), cmd, |
e057f533 | 933 | (cmd->t_state == TRANSPORT_COMPLETE_QF_OK) ? "COMPLETE_OK" : |
07bde79a NB |
934 | (cmd->t_state == TRANSPORT_COMPLETE_QF_WP) ? "WRITE_PENDING" |
935 | : "UNKNOWN"); | |
f7a5cc0b CH |
936 | |
937 | transport_add_cmd_to_queue(cmd, cmd->t_state, true); | |
07bde79a | 938 | } |
07bde79a NB |
939 | } |
940 | ||
c66ac9db NB |
941 | unsigned char *transport_dump_cmd_direction(struct se_cmd *cmd) |
942 | { | |
943 | switch (cmd->data_direction) { | |
944 | case DMA_NONE: | |
945 | return "NONE"; | |
946 | case DMA_FROM_DEVICE: | |
947 | return "READ"; | |
948 | case DMA_TO_DEVICE: | |
949 | return "WRITE"; | |
950 | case DMA_BIDIRECTIONAL: | |
951 | return "BIDI"; | |
952 | default: | |
953 | break; | |
954 | } | |
955 | ||
956 | return "UNKNOWN"; | |
957 | } | |
958 | ||
959 | void transport_dump_dev_state( | |
960 | struct se_device *dev, | |
961 | char *b, | |
962 | int *bl) | |
963 | { | |
964 | *bl += sprintf(b + *bl, "Status: "); | |
965 | switch (dev->dev_status) { | |
966 | case TRANSPORT_DEVICE_ACTIVATED: | |
967 | *bl += sprintf(b + *bl, "ACTIVATED"); | |
968 | break; | |
969 | case TRANSPORT_DEVICE_DEACTIVATED: | |
970 | *bl += sprintf(b + *bl, "DEACTIVATED"); | |
971 | break; | |
972 | case TRANSPORT_DEVICE_SHUTDOWN: | |
973 | *bl += sprintf(b + *bl, "SHUTDOWN"); | |
974 | break; | |
975 | case TRANSPORT_DEVICE_OFFLINE_ACTIVATED: | |
976 | case TRANSPORT_DEVICE_OFFLINE_DEACTIVATED: | |
977 | *bl += sprintf(b + *bl, "OFFLINE"); | |
978 | break; | |
979 | default: | |
980 | *bl += sprintf(b + *bl, "UNKNOWN=%d", dev->dev_status); | |
981 | break; | |
982 | } | |
983 | ||
984 | *bl += sprintf(b + *bl, " Execute/Left/Max Queue Depth: %d/%d/%d", | |
985 | atomic_read(&dev->execute_tasks), atomic_read(&dev->depth_left), | |
986 | dev->queue_depth); | |
987 | *bl += sprintf(b + *bl, " SectorSize: %u MaxSectors: %u\n", | |
e3d6f909 | 988 | dev->se_sub_dev->se_dev_attrib.block_size, dev->se_sub_dev->se_dev_attrib.max_sectors); |
c66ac9db NB |
989 | *bl += sprintf(b + *bl, " "); |
990 | } | |
991 | ||
c66ac9db NB |
992 | void transport_dump_vpd_proto_id( |
993 | struct t10_vpd *vpd, | |
994 | unsigned char *p_buf, | |
995 | int p_buf_len) | |
996 | { | |
997 | unsigned char buf[VPD_TMP_BUF_SIZE]; | |
998 | int len; | |
999 | ||
1000 | memset(buf, 0, VPD_TMP_BUF_SIZE); | |
1001 | len = sprintf(buf, "T10 VPD Protocol Identifier: "); | |
1002 | ||
1003 | switch (vpd->protocol_identifier) { | |
1004 | case 0x00: | |
1005 | sprintf(buf+len, "Fibre Channel\n"); | |
1006 | break; | |
1007 | case 0x10: | |
1008 | sprintf(buf+len, "Parallel SCSI\n"); | |
1009 | break; | |
1010 | case 0x20: | |
1011 | sprintf(buf+len, "SSA\n"); | |
1012 | break; | |
1013 | case 0x30: | |
1014 | sprintf(buf+len, "IEEE 1394\n"); | |
1015 | break; | |
1016 | case 0x40: | |
1017 | sprintf(buf+len, "SCSI Remote Direct Memory Access" | |
1018 | " Protocol\n"); | |
1019 | break; | |
1020 | case 0x50: | |
1021 | sprintf(buf+len, "Internet SCSI (iSCSI)\n"); | |
1022 | break; | |
1023 | case 0x60: | |
1024 | sprintf(buf+len, "SAS Serial SCSI Protocol\n"); | |
1025 | break; | |
1026 | case 0x70: | |
1027 | sprintf(buf+len, "Automation/Drive Interface Transport" | |
1028 | " Protocol\n"); | |
1029 | break; | |
1030 | case 0x80: | |
1031 | sprintf(buf+len, "AT Attachment Interface ATA/ATAPI\n"); | |
1032 | break; | |
1033 | default: | |
1034 | sprintf(buf+len, "Unknown 0x%02x\n", | |
1035 | vpd->protocol_identifier); | |
1036 | break; | |
1037 | } | |
1038 | ||
1039 | if (p_buf) | |
1040 | strncpy(p_buf, buf, p_buf_len); | |
1041 | else | |
6708bb27 | 1042 | pr_debug("%s", buf); |
c66ac9db NB |
1043 | } |
1044 | ||
1045 | void | |
1046 | transport_set_vpd_proto_id(struct t10_vpd *vpd, unsigned char *page_83) | |
1047 | { | |
1048 | /* | |
1049 | * Check if the Protocol Identifier Valid (PIV) bit is set.. | |
1050 | * | |
1051 | * from spc3r23.pdf section 7.5.1 | |
1052 | */ | |
1053 | if (page_83[1] & 0x80) { | |
1054 | vpd->protocol_identifier = (page_83[0] & 0xf0); | |
1055 | vpd->protocol_identifier_set = 1; | |
1056 | transport_dump_vpd_proto_id(vpd, NULL, 0); | |
1057 | } | |
1058 | } | |
1059 | EXPORT_SYMBOL(transport_set_vpd_proto_id); | |
1060 | ||
1061 | int transport_dump_vpd_assoc( | |
1062 | struct t10_vpd *vpd, | |
1063 | unsigned char *p_buf, | |
1064 | int p_buf_len) | |
1065 | { | |
1066 | unsigned char buf[VPD_TMP_BUF_SIZE]; | |
e3d6f909 AG |
1067 | int ret = 0; |
1068 | int len; | |
c66ac9db NB |
1069 | |
1070 | memset(buf, 0, VPD_TMP_BUF_SIZE); | |
1071 | len = sprintf(buf, "T10 VPD Identifier Association: "); | |
1072 | ||
1073 | switch (vpd->association) { | |
1074 | case 0x00: | |
1075 | sprintf(buf+len, "addressed logical unit\n"); | |
1076 | break; | |
1077 | case 0x10: | |
1078 | sprintf(buf+len, "target port\n"); | |
1079 | break; | |
1080 | case 0x20: | |
1081 | sprintf(buf+len, "SCSI target device\n"); | |
1082 | break; | |
1083 | default: | |
1084 | sprintf(buf+len, "Unknown 0x%02x\n", vpd->association); | |
e3d6f909 | 1085 | ret = -EINVAL; |
c66ac9db NB |
1086 | break; |
1087 | } | |
1088 | ||
1089 | if (p_buf) | |
1090 | strncpy(p_buf, buf, p_buf_len); | |
1091 | else | |
6708bb27 | 1092 | pr_debug("%s", buf); |
c66ac9db NB |
1093 | |
1094 | return ret; | |
1095 | } | |
1096 | ||
1097 | int transport_set_vpd_assoc(struct t10_vpd *vpd, unsigned char *page_83) | |
1098 | { | |
1099 | /* | |
1100 | * The VPD identification association.. | |
1101 | * | |
1102 | * from spc3r23.pdf Section 7.6.3.1 Table 297 | |
1103 | */ | |
1104 | vpd->association = (page_83[1] & 0x30); | |
1105 | return transport_dump_vpd_assoc(vpd, NULL, 0); | |
1106 | } | |
1107 | EXPORT_SYMBOL(transport_set_vpd_assoc); | |
1108 | ||
1109 | int transport_dump_vpd_ident_type( | |
1110 | struct t10_vpd *vpd, | |
1111 | unsigned char *p_buf, | |
1112 | int p_buf_len) | |
1113 | { | |
1114 | unsigned char buf[VPD_TMP_BUF_SIZE]; | |
e3d6f909 AG |
1115 | int ret = 0; |
1116 | int len; | |
c66ac9db NB |
1117 | |
1118 | memset(buf, 0, VPD_TMP_BUF_SIZE); | |
1119 | len = sprintf(buf, "T10 VPD Identifier Type: "); | |
1120 | ||
1121 | switch (vpd->device_identifier_type) { | |
1122 | case 0x00: | |
1123 | sprintf(buf+len, "Vendor specific\n"); | |
1124 | break; | |
1125 | case 0x01: | |
1126 | sprintf(buf+len, "T10 Vendor ID based\n"); | |
1127 | break; | |
1128 | case 0x02: | |
1129 | sprintf(buf+len, "EUI-64 based\n"); | |
1130 | break; | |
1131 | case 0x03: | |
1132 | sprintf(buf+len, "NAA\n"); | |
1133 | break; | |
1134 | case 0x04: | |
1135 | sprintf(buf+len, "Relative target port identifier\n"); | |
1136 | break; | |
1137 | case 0x08: | |
1138 | sprintf(buf+len, "SCSI name string\n"); | |
1139 | break; | |
1140 | default: | |
1141 | sprintf(buf+len, "Unsupported: 0x%02x\n", | |
1142 | vpd->device_identifier_type); | |
e3d6f909 | 1143 | ret = -EINVAL; |
c66ac9db NB |
1144 | break; |
1145 | } | |
1146 | ||
e3d6f909 AG |
1147 | if (p_buf) { |
1148 | if (p_buf_len < strlen(buf)+1) | |
1149 | return -EINVAL; | |
c66ac9db | 1150 | strncpy(p_buf, buf, p_buf_len); |
e3d6f909 | 1151 | } else { |
6708bb27 | 1152 | pr_debug("%s", buf); |
e3d6f909 | 1153 | } |
c66ac9db NB |
1154 | |
1155 | return ret; | |
1156 | } | |
1157 | ||
1158 | int transport_set_vpd_ident_type(struct t10_vpd *vpd, unsigned char *page_83) | |
1159 | { | |
1160 | /* | |
1161 | * The VPD identifier type.. | |
1162 | * | |
1163 | * from spc3r23.pdf Section 7.6.3.1 Table 298 | |
1164 | */ | |
1165 | vpd->device_identifier_type = (page_83[1] & 0x0f); | |
1166 | return transport_dump_vpd_ident_type(vpd, NULL, 0); | |
1167 | } | |
1168 | EXPORT_SYMBOL(transport_set_vpd_ident_type); | |
1169 | ||
1170 | int transport_dump_vpd_ident( | |
1171 | struct t10_vpd *vpd, | |
1172 | unsigned char *p_buf, | |
1173 | int p_buf_len) | |
1174 | { | |
1175 | unsigned char buf[VPD_TMP_BUF_SIZE]; | |
1176 | int ret = 0; | |
1177 | ||
1178 | memset(buf, 0, VPD_TMP_BUF_SIZE); | |
1179 | ||
1180 | switch (vpd->device_identifier_code_set) { | |
1181 | case 0x01: /* Binary */ | |
1182 | sprintf(buf, "T10 VPD Binary Device Identifier: %s\n", | |
1183 | &vpd->device_identifier[0]); | |
1184 | break; | |
1185 | case 0x02: /* ASCII */ | |
1186 | sprintf(buf, "T10 VPD ASCII Device Identifier: %s\n", | |
1187 | &vpd->device_identifier[0]); | |
1188 | break; | |
1189 | case 0x03: /* UTF-8 */ | |
1190 | sprintf(buf, "T10 VPD UTF-8 Device Identifier: %s\n", | |
1191 | &vpd->device_identifier[0]); | |
1192 | break; | |
1193 | default: | |
1194 | sprintf(buf, "T10 VPD Device Identifier encoding unsupported:" | |
1195 | " 0x%02x", vpd->device_identifier_code_set); | |
e3d6f909 | 1196 | ret = -EINVAL; |
c66ac9db NB |
1197 | break; |
1198 | } | |
1199 | ||
1200 | if (p_buf) | |
1201 | strncpy(p_buf, buf, p_buf_len); | |
1202 | else | |
6708bb27 | 1203 | pr_debug("%s", buf); |
c66ac9db NB |
1204 | |
1205 | return ret; | |
1206 | } | |
1207 | ||
1208 | int | |
1209 | transport_set_vpd_ident(struct t10_vpd *vpd, unsigned char *page_83) | |
1210 | { | |
1211 | static const char hex_str[] = "0123456789abcdef"; | |
1212 | int j = 0, i = 4; /* offset to start of the identifer */ | |
1213 | ||
1214 | /* | |
1215 | * The VPD Code Set (encoding) | |
1216 | * | |
1217 | * from spc3r23.pdf Section 7.6.3.1 Table 296 | |
1218 | */ | |
1219 | vpd->device_identifier_code_set = (page_83[0] & 0x0f); | |
1220 | switch (vpd->device_identifier_code_set) { | |
1221 | case 0x01: /* Binary */ | |
1222 | vpd->device_identifier[j++] = | |
1223 | hex_str[vpd->device_identifier_type]; | |
1224 | while (i < (4 + page_83[3])) { | |
1225 | vpd->device_identifier[j++] = | |
1226 | hex_str[(page_83[i] & 0xf0) >> 4]; | |
1227 | vpd->device_identifier[j++] = | |
1228 | hex_str[page_83[i] & 0x0f]; | |
1229 | i++; | |
1230 | } | |
1231 | break; | |
1232 | case 0x02: /* ASCII */ | |
1233 | case 0x03: /* UTF-8 */ | |
1234 | while (i < (4 + page_83[3])) | |
1235 | vpd->device_identifier[j++] = page_83[i++]; | |
1236 | break; | |
1237 | default: | |
1238 | break; | |
1239 | } | |
1240 | ||
1241 | return transport_dump_vpd_ident(vpd, NULL, 0); | |
1242 | } | |
1243 | EXPORT_SYMBOL(transport_set_vpd_ident); | |
1244 | ||
1245 | static void core_setup_task_attr_emulation(struct se_device *dev) | |
1246 | { | |
1247 | /* | |
1248 | * If this device is from Target_Core_Mod/pSCSI, disable the | |
1249 | * SAM Task Attribute emulation. | |
1250 | * | |
1251 | * This is currently not available in upsream Linux/SCSI Target | |
1252 | * mode code, and is assumed to be disabled while using TCM/pSCSI. | |
1253 | */ | |
e3d6f909 | 1254 | if (dev->transport->transport_type == TRANSPORT_PLUGIN_PHBA_PDEV) { |
c66ac9db NB |
1255 | dev->dev_task_attr_type = SAM_TASK_ATTR_PASSTHROUGH; |
1256 | return; | |
1257 | } | |
1258 | ||
1259 | dev->dev_task_attr_type = SAM_TASK_ATTR_EMULATED; | |
6708bb27 | 1260 | pr_debug("%s: Using SAM_TASK_ATTR_EMULATED for SPC: 0x%02x" |
e3d6f909 AG |
1261 | " device\n", dev->transport->name, |
1262 | dev->transport->get_device_rev(dev)); | |
c66ac9db NB |
1263 | } |
1264 | ||
1265 | static void scsi_dump_inquiry(struct se_device *dev) | |
1266 | { | |
e3d6f909 | 1267 | struct t10_wwn *wwn = &dev->se_sub_dev->t10_wwn; |
c66ac9db NB |
1268 | int i, device_type; |
1269 | /* | |
1270 | * Print Linux/SCSI style INQUIRY formatting to the kernel ring buffer | |
1271 | */ | |
6708bb27 | 1272 | pr_debug(" Vendor: "); |
c66ac9db NB |
1273 | for (i = 0; i < 8; i++) |
1274 | if (wwn->vendor[i] >= 0x20) | |
6708bb27 | 1275 | pr_debug("%c", wwn->vendor[i]); |
c66ac9db | 1276 | else |
6708bb27 | 1277 | pr_debug(" "); |
c66ac9db | 1278 | |
6708bb27 | 1279 | pr_debug(" Model: "); |
c66ac9db NB |
1280 | for (i = 0; i < 16; i++) |
1281 | if (wwn->model[i] >= 0x20) | |
6708bb27 | 1282 | pr_debug("%c", wwn->model[i]); |
c66ac9db | 1283 | else |
6708bb27 | 1284 | pr_debug(" "); |
c66ac9db | 1285 | |
6708bb27 | 1286 | pr_debug(" Revision: "); |
c66ac9db NB |
1287 | for (i = 0; i < 4; i++) |
1288 | if (wwn->revision[i] >= 0x20) | |
6708bb27 | 1289 | pr_debug("%c", wwn->revision[i]); |
c66ac9db | 1290 | else |
6708bb27 | 1291 | pr_debug(" "); |
c66ac9db | 1292 | |
6708bb27 | 1293 | pr_debug("\n"); |
c66ac9db | 1294 | |
e3d6f909 | 1295 | device_type = dev->transport->get_device_type(dev); |
6708bb27 AG |
1296 | pr_debug(" Type: %s ", scsi_device_type(device_type)); |
1297 | pr_debug(" ANSI SCSI revision: %02x\n", | |
e3d6f909 | 1298 | dev->transport->get_device_rev(dev)); |
c66ac9db NB |
1299 | } |
1300 | ||
1301 | struct se_device *transport_add_device_to_core_hba( | |
1302 | struct se_hba *hba, | |
1303 | struct se_subsystem_api *transport, | |
1304 | struct se_subsystem_dev *se_dev, | |
1305 | u32 device_flags, | |
1306 | void *transport_dev, | |
1307 | struct se_dev_limits *dev_limits, | |
1308 | const char *inquiry_prod, | |
1309 | const char *inquiry_rev) | |
1310 | { | |
12a18bdc | 1311 | int force_pt; |
c66ac9db NB |
1312 | struct se_device *dev; |
1313 | ||
1314 | dev = kzalloc(sizeof(struct se_device), GFP_KERNEL); | |
6708bb27 AG |
1315 | if (!dev) { |
1316 | pr_err("Unable to allocate memory for se_dev_t\n"); | |
c66ac9db NB |
1317 | return NULL; |
1318 | } | |
c66ac9db | 1319 | |
e3d6f909 | 1320 | transport_init_queue_obj(&dev->dev_queue_obj); |
c66ac9db NB |
1321 | dev->dev_flags = device_flags; |
1322 | dev->dev_status |= TRANSPORT_DEVICE_DEACTIVATED; | |
5951146d | 1323 | dev->dev_ptr = transport_dev; |
c66ac9db NB |
1324 | dev->se_hba = hba; |
1325 | dev->se_sub_dev = se_dev; | |
1326 | dev->transport = transport; | |
c66ac9db NB |
1327 | INIT_LIST_HEAD(&dev->dev_list); |
1328 | INIT_LIST_HEAD(&dev->dev_sep_list); | |
1329 | INIT_LIST_HEAD(&dev->dev_tmr_list); | |
1330 | INIT_LIST_HEAD(&dev->execute_task_list); | |
1331 | INIT_LIST_HEAD(&dev->delayed_cmd_list); | |
c66ac9db | 1332 | INIT_LIST_HEAD(&dev->state_task_list); |
07bde79a | 1333 | INIT_LIST_HEAD(&dev->qf_cmd_list); |
c66ac9db NB |
1334 | spin_lock_init(&dev->execute_task_lock); |
1335 | spin_lock_init(&dev->delayed_cmd_lock); | |
c66ac9db NB |
1336 | spin_lock_init(&dev->dev_reservation_lock); |
1337 | spin_lock_init(&dev->dev_status_lock); | |
c66ac9db NB |
1338 | spin_lock_init(&dev->se_port_lock); |
1339 | spin_lock_init(&dev->se_tmr_lock); | |
07bde79a | 1340 | spin_lock_init(&dev->qf_cmd_lock); |
c66ac9db NB |
1341 | |
1342 | dev->queue_depth = dev_limits->queue_depth; | |
1343 | atomic_set(&dev->depth_left, dev->queue_depth); | |
1344 | atomic_set(&dev->dev_ordered_id, 0); | |
1345 | ||
1346 | se_dev_set_default_attribs(dev, dev_limits); | |
1347 | ||
1348 | dev->dev_index = scsi_get_new_index(SCSI_DEVICE_INDEX); | |
1349 | dev->creation_time = get_jiffies_64(); | |
1350 | spin_lock_init(&dev->stats_lock); | |
1351 | ||
1352 | spin_lock(&hba->device_lock); | |
1353 | list_add_tail(&dev->dev_list, &hba->hba_dev_list); | |
1354 | hba->dev_count++; | |
1355 | spin_unlock(&hba->device_lock); | |
1356 | /* | |
1357 | * Setup the SAM Task Attribute emulation for struct se_device | |
1358 | */ | |
1359 | core_setup_task_attr_emulation(dev); | |
1360 | /* | |
1361 | * Force PR and ALUA passthrough emulation with internal object use. | |
1362 | */ | |
1363 | force_pt = (hba->hba_flags & HBA_FLAGS_INTERNAL_USE); | |
1364 | /* | |
1365 | * Setup the Reservations infrastructure for struct se_device | |
1366 | */ | |
1367 | core_setup_reservations(dev, force_pt); | |
1368 | /* | |
1369 | * Setup the Asymmetric Logical Unit Assignment for struct se_device | |
1370 | */ | |
1371 | if (core_setup_alua(dev, force_pt) < 0) | |
1372 | goto out; | |
1373 | ||
1374 | /* | |
1375 | * Startup the struct se_device processing thread | |
1376 | */ | |
1377 | dev->process_thread = kthread_run(transport_processing_thread, dev, | |
e3d6f909 | 1378 | "LIO_%s", dev->transport->name); |
c66ac9db | 1379 | if (IS_ERR(dev->process_thread)) { |
6708bb27 | 1380 | pr_err("Unable to create kthread: LIO_%s\n", |
e3d6f909 | 1381 | dev->transport->name); |
c66ac9db NB |
1382 | goto out; |
1383 | } | |
07bde79a NB |
1384 | /* |
1385 | * Setup work_queue for QUEUE_FULL | |
1386 | */ | |
1387 | INIT_WORK(&dev->qf_work_queue, target_qf_do_work); | |
c66ac9db NB |
1388 | /* |
1389 | * Preload the initial INQUIRY const values if we are doing | |
1390 | * anything virtual (IBLOCK, FILEIO, RAMDISK), but not for TCM/pSCSI | |
1391 | * passthrough because this is being provided by the backend LLD. | |
1392 | * This is required so that transport_get_inquiry() copies these | |
1393 | * originals once back into DEV_T10_WWN(dev) for the virtual device | |
1394 | * setup. | |
1395 | */ | |
e3d6f909 | 1396 | if (dev->transport->transport_type != TRANSPORT_PLUGIN_PHBA_PDEV) { |
f22c1196 | 1397 | if (!inquiry_prod || !inquiry_rev) { |
6708bb27 | 1398 | pr_err("All non TCM/pSCSI plugins require" |
c66ac9db NB |
1399 | " INQUIRY consts\n"); |
1400 | goto out; | |
1401 | } | |
1402 | ||
e3d6f909 AG |
1403 | strncpy(&dev->se_sub_dev->t10_wwn.vendor[0], "LIO-ORG", 8); |
1404 | strncpy(&dev->se_sub_dev->t10_wwn.model[0], inquiry_prod, 16); | |
1405 | strncpy(&dev->se_sub_dev->t10_wwn.revision[0], inquiry_rev, 4); | |
c66ac9db NB |
1406 | } |
1407 | scsi_dump_inquiry(dev); | |
1408 | ||
12a18bdc | 1409 | return dev; |
c66ac9db | 1410 | out: |
c66ac9db NB |
1411 | kthread_stop(dev->process_thread); |
1412 | ||
1413 | spin_lock(&hba->device_lock); | |
1414 | list_del(&dev->dev_list); | |
1415 | hba->dev_count--; | |
1416 | spin_unlock(&hba->device_lock); | |
1417 | ||
1418 | se_release_vpd_for_dev(dev); | |
1419 | ||
c66ac9db NB |
1420 | kfree(dev); |
1421 | ||
1422 | return NULL; | |
1423 | } | |
1424 | EXPORT_SYMBOL(transport_add_device_to_core_hba); | |
1425 | ||
1426 | /* transport_generic_prepare_cdb(): | |
1427 | * | |
1428 | * Since the Initiator sees iSCSI devices as LUNs, the SCSI CDB will | |
1429 | * contain the iSCSI LUN in bits 7-5 of byte 1 as per SAM-2. | |
1430 | * The point of this is since we are mapping iSCSI LUNs to | |
1431 | * SCSI Target IDs having a non-zero LUN in the CDB will throw the | |
1432 | * devices and HBAs for a loop. | |
1433 | */ | |
1434 | static inline void transport_generic_prepare_cdb( | |
1435 | unsigned char *cdb) | |
1436 | { | |
1437 | switch (cdb[0]) { | |
1438 | case READ_10: /* SBC - RDProtect */ | |
1439 | case READ_12: /* SBC - RDProtect */ | |
1440 | case READ_16: /* SBC - RDProtect */ | |
1441 | case SEND_DIAGNOSTIC: /* SPC - SELF-TEST Code */ | |
1442 | case VERIFY: /* SBC - VRProtect */ | |
1443 | case VERIFY_16: /* SBC - VRProtect */ | |
1444 | case WRITE_VERIFY: /* SBC - VRProtect */ | |
1445 | case WRITE_VERIFY_12: /* SBC - VRProtect */ | |
1446 | break; | |
1447 | default: | |
1448 | cdb[1] &= 0x1f; /* clear logical unit number */ | |
1449 | break; | |
1450 | } | |
1451 | } | |
1452 | ||
1453 | static struct se_task * | |
1454 | transport_generic_get_task(struct se_cmd *cmd, | |
1455 | enum dma_data_direction data_direction) | |
1456 | { | |
1457 | struct se_task *task; | |
5951146d | 1458 | struct se_device *dev = cmd->se_dev; |
c66ac9db | 1459 | |
6708bb27 | 1460 | task = dev->transport->alloc_task(cmd->t_task_cdb); |
c66ac9db | 1461 | if (!task) { |
6708bb27 | 1462 | pr_err("Unable to allocate struct se_task\n"); |
c66ac9db NB |
1463 | return NULL; |
1464 | } | |
1465 | ||
1466 | INIT_LIST_HEAD(&task->t_list); | |
1467 | INIT_LIST_HEAD(&task->t_execute_list); | |
1468 | INIT_LIST_HEAD(&task->t_state_list); | |
1469 | init_completion(&task->task_stop_comp); | |
c66ac9db | 1470 | task->task_se_cmd = cmd; |
c66ac9db NB |
1471 | task->task_data_direction = data_direction; |
1472 | ||
c66ac9db NB |
1473 | return task; |
1474 | } | |
1475 | ||
1476 | static int transport_generic_cmd_sequencer(struct se_cmd *, unsigned char *); | |
1477 | ||
c66ac9db NB |
1478 | /* |
1479 | * Used by fabric modules containing a local struct se_cmd within their | |
1480 | * fabric dependent per I/O descriptor. | |
1481 | */ | |
1482 | void transport_init_se_cmd( | |
1483 | struct se_cmd *cmd, | |
1484 | struct target_core_fabric_ops *tfo, | |
1485 | struct se_session *se_sess, | |
1486 | u32 data_length, | |
1487 | int data_direction, | |
1488 | int task_attr, | |
1489 | unsigned char *sense_buffer) | |
1490 | { | |
5951146d AG |
1491 | INIT_LIST_HEAD(&cmd->se_lun_node); |
1492 | INIT_LIST_HEAD(&cmd->se_delayed_node); | |
07bde79a | 1493 | INIT_LIST_HEAD(&cmd->se_qf_node); |
79a7fef2 | 1494 | INIT_LIST_HEAD(&cmd->se_queue_node); |
a17f091d | 1495 | INIT_LIST_HEAD(&cmd->se_cmd_list); |
a1d8b49a AG |
1496 | INIT_LIST_HEAD(&cmd->t_task_list); |
1497 | init_completion(&cmd->transport_lun_fe_stop_comp); | |
1498 | init_completion(&cmd->transport_lun_stop_comp); | |
1499 | init_completion(&cmd->t_transport_stop_comp); | |
a17f091d | 1500 | init_completion(&cmd->cmd_wait_comp); |
a1d8b49a AG |
1501 | spin_lock_init(&cmd->t_state_lock); |
1502 | atomic_set(&cmd->transport_dev_active, 1); | |
c66ac9db NB |
1503 | |
1504 | cmd->se_tfo = tfo; | |
1505 | cmd->se_sess = se_sess; | |
1506 | cmd->data_length = data_length; | |
1507 | cmd->data_direction = data_direction; | |
1508 | cmd->sam_task_attr = task_attr; | |
1509 | cmd->sense_buffer = sense_buffer; | |
1510 | } | |
1511 | EXPORT_SYMBOL(transport_init_se_cmd); | |
1512 | ||
1513 | static int transport_check_alloc_task_attr(struct se_cmd *cmd) | |
1514 | { | |
1515 | /* | |
1516 | * Check if SAM Task Attribute emulation is enabled for this | |
1517 | * struct se_device storage object | |
1518 | */ | |
5951146d | 1519 | if (cmd->se_dev->dev_task_attr_type != SAM_TASK_ATTR_EMULATED) |
c66ac9db NB |
1520 | return 0; |
1521 | ||
e66ecd50 | 1522 | if (cmd->sam_task_attr == MSG_ACA_TAG) { |
6708bb27 | 1523 | pr_debug("SAM Task Attribute ACA" |
c66ac9db | 1524 | " emulation is not supported\n"); |
e3d6f909 | 1525 | return -EINVAL; |
c66ac9db NB |
1526 | } |
1527 | /* | |
1528 | * Used to determine when ORDERED commands should go from | |
1529 | * Dormant to Active status. | |
1530 | */ | |
5951146d | 1531 | cmd->se_ordered_id = atomic_inc_return(&cmd->se_dev->dev_ordered_id); |
c66ac9db | 1532 | smp_mb__after_atomic_inc(); |
6708bb27 | 1533 | pr_debug("Allocated se_ordered_id: %u for Task Attr: 0x%02x on %s\n", |
c66ac9db | 1534 | cmd->se_ordered_id, cmd->sam_task_attr, |
6708bb27 | 1535 | cmd->se_dev->transport->name); |
c66ac9db NB |
1536 | return 0; |
1537 | } | |
1538 | ||
c66ac9db NB |
1539 | /* transport_generic_allocate_tasks(): |
1540 | * | |
1541 | * Called from fabric RX Thread. | |
1542 | */ | |
1543 | int transport_generic_allocate_tasks( | |
1544 | struct se_cmd *cmd, | |
1545 | unsigned char *cdb) | |
1546 | { | |
1547 | int ret; | |
1548 | ||
1549 | transport_generic_prepare_cdb(cdb); | |
c66ac9db NB |
1550 | /* |
1551 | * Ensure that the received CDB is less than the max (252 + 8) bytes | |
1552 | * for VARIABLE_LENGTH_CMD | |
1553 | */ | |
1554 | if (scsi_command_size(cdb) > SCSI_MAX_VARLEN_CDB_SIZE) { | |
6708bb27 | 1555 | pr_err("Received SCSI CDB with command_size: %d that" |
c66ac9db NB |
1556 | " exceeds SCSI_MAX_VARLEN_CDB_SIZE: %d\n", |
1557 | scsi_command_size(cdb), SCSI_MAX_VARLEN_CDB_SIZE); | |
03e98c9e NB |
1558 | cmd->se_cmd_flags |= SCF_SCSI_CDB_EXCEPTION; |
1559 | cmd->scsi_sense_reason = TCM_INVALID_CDB_FIELD; | |
e3d6f909 | 1560 | return -EINVAL; |
c66ac9db NB |
1561 | } |
1562 | /* | |
1563 | * If the received CDB is larger than TCM_MAX_COMMAND_SIZE, | |
1564 | * allocate the additional extended CDB buffer now.. Otherwise | |
1565 | * setup the pointer from __t_task_cdb to t_task_cdb. | |
1566 | */ | |
a1d8b49a AG |
1567 | if (scsi_command_size(cdb) > sizeof(cmd->__t_task_cdb)) { |
1568 | cmd->t_task_cdb = kzalloc(scsi_command_size(cdb), | |
c66ac9db | 1569 | GFP_KERNEL); |
6708bb27 AG |
1570 | if (!cmd->t_task_cdb) { |
1571 | pr_err("Unable to allocate cmd->t_task_cdb" | |
a1d8b49a | 1572 | " %u > sizeof(cmd->__t_task_cdb): %lu ops\n", |
c66ac9db | 1573 | scsi_command_size(cdb), |
a1d8b49a | 1574 | (unsigned long)sizeof(cmd->__t_task_cdb)); |
03e98c9e NB |
1575 | cmd->se_cmd_flags |= SCF_SCSI_CDB_EXCEPTION; |
1576 | cmd->scsi_sense_reason = | |
1577 | TCM_LOGICAL_UNIT_COMMUNICATION_FAILURE; | |
e3d6f909 | 1578 | return -ENOMEM; |
c66ac9db NB |
1579 | } |
1580 | } else | |
a1d8b49a | 1581 | cmd->t_task_cdb = &cmd->__t_task_cdb[0]; |
c66ac9db | 1582 | /* |
a1d8b49a | 1583 | * Copy the original CDB into cmd-> |
c66ac9db | 1584 | */ |
a1d8b49a | 1585 | memcpy(cmd->t_task_cdb, cdb, scsi_command_size(cdb)); |
c66ac9db NB |
1586 | /* |
1587 | * Setup the received CDB based on SCSI defined opcodes and | |
1588 | * perform unit attention, persistent reservations and ALUA | |
a1d8b49a | 1589 | * checks for virtual device backends. The cmd->t_task_cdb |
c66ac9db NB |
1590 | * pointer is expected to be setup before we reach this point. |
1591 | */ | |
1592 | ret = transport_generic_cmd_sequencer(cmd, cdb); | |
1593 | if (ret < 0) | |
1594 | return ret; | |
1595 | /* | |
1596 | * Check for SAM Task Attribute Emulation | |
1597 | */ | |
1598 | if (transport_check_alloc_task_attr(cmd) < 0) { | |
1599 | cmd->se_cmd_flags |= SCF_SCSI_CDB_EXCEPTION; | |
1600 | cmd->scsi_sense_reason = TCM_INVALID_CDB_FIELD; | |
5951146d | 1601 | return -EINVAL; |
c66ac9db NB |
1602 | } |
1603 | spin_lock(&cmd->se_lun->lun_sep_lock); | |
1604 | if (cmd->se_lun->lun_sep) | |
1605 | cmd->se_lun->lun_sep->sep_stats.cmd_pdus++; | |
1606 | spin_unlock(&cmd->se_lun->lun_sep_lock); | |
1607 | return 0; | |
1608 | } | |
1609 | EXPORT_SYMBOL(transport_generic_allocate_tasks); | |
1610 | ||
695434e1 NB |
1611 | /* |
1612 | * Used by fabric module frontends to queue tasks directly. | |
1613 | * Many only be used from process context only | |
1614 | */ | |
1615 | int transport_handle_cdb_direct( | |
1616 | struct se_cmd *cmd) | |
1617 | { | |
dd8ae59d NB |
1618 | int ret; |
1619 | ||
695434e1 NB |
1620 | if (!cmd->se_lun) { |
1621 | dump_stack(); | |
6708bb27 | 1622 | pr_err("cmd->se_lun is NULL\n"); |
695434e1 NB |
1623 | return -EINVAL; |
1624 | } | |
1625 | if (in_interrupt()) { | |
1626 | dump_stack(); | |
6708bb27 | 1627 | pr_err("transport_generic_handle_cdb cannot be called" |
695434e1 NB |
1628 | " from interrupt context\n"); |
1629 | return -EINVAL; | |
1630 | } | |
dd8ae59d NB |
1631 | /* |
1632 | * Set TRANSPORT_NEW_CMD state and cmd->t_transport_active=1 following | |
1633 | * transport_generic_handle_cdb*() -> transport_add_cmd_to_queue() | |
1634 | * in existing usage to ensure that outstanding descriptors are handled | |
d14921d6 | 1635 | * correctly during shutdown via transport_wait_for_tasks() |
dd8ae59d NB |
1636 | * |
1637 | * Also, we don't take cmd->t_state_lock here as we only expect | |
1638 | * this to be called for initial descriptor submission. | |
1639 | */ | |
1640 | cmd->t_state = TRANSPORT_NEW_CMD; | |
1641 | atomic_set(&cmd->t_transport_active, 1); | |
1642 | /* | |
1643 | * transport_generic_new_cmd() is already handling QUEUE_FULL, | |
1644 | * so follow TRANSPORT_NEW_CMD processing thread context usage | |
1645 | * and call transport_generic_request_failure() if necessary.. | |
1646 | */ | |
1647 | ret = transport_generic_new_cmd(cmd); | |
03e98c9e NB |
1648 | if (ret < 0) |
1649 | transport_generic_request_failure(cmd); | |
1650 | ||
dd8ae59d | 1651 | return 0; |
695434e1 NB |
1652 | } |
1653 | EXPORT_SYMBOL(transport_handle_cdb_direct); | |
1654 | ||
c66ac9db NB |
1655 | /* |
1656 | * Used by fabric module frontends defining a TFO->new_cmd_map() caller | |
1657 | * to queue up a newly setup se_cmd w/ TRANSPORT_NEW_CMD_MAP in order to | |
1658 | * complete setup in TCM process context w/ TFO->new_cmd_map(). | |
1659 | */ | |
1660 | int transport_generic_handle_cdb_map( | |
1661 | struct se_cmd *cmd) | |
1662 | { | |
e3d6f909 | 1663 | if (!cmd->se_lun) { |
c66ac9db | 1664 | dump_stack(); |
6708bb27 | 1665 | pr_err("cmd->se_lun is NULL\n"); |
e3d6f909 | 1666 | return -EINVAL; |
c66ac9db NB |
1667 | } |
1668 | ||
f7a5cc0b | 1669 | transport_add_cmd_to_queue(cmd, TRANSPORT_NEW_CMD_MAP, false); |
c66ac9db NB |
1670 | return 0; |
1671 | } | |
1672 | EXPORT_SYMBOL(transport_generic_handle_cdb_map); | |
1673 | ||
1674 | /* transport_generic_handle_data(): | |
1675 | * | |
1676 | * | |
1677 | */ | |
1678 | int transport_generic_handle_data( | |
1679 | struct se_cmd *cmd) | |
1680 | { | |
1681 | /* | |
1682 | * For the software fabric case, then we assume the nexus is being | |
1683 | * failed/shutdown when signals are pending from the kthread context | |
1684 | * caller, so we return a failure. For the HW target mode case running | |
1685 | * in interrupt code, the signal_pending() check is skipped. | |
1686 | */ | |
1687 | if (!in_interrupt() && signal_pending(current)) | |
e3d6f909 | 1688 | return -EPERM; |
c66ac9db NB |
1689 | /* |
1690 | * If the received CDB has aleady been ABORTED by the generic | |
1691 | * target engine, we now call transport_check_aborted_status() | |
1692 | * to queue any delated TASK_ABORTED status for the received CDB to the | |
25985edc | 1693 | * fabric module as we are expecting no further incoming DATA OUT |
c66ac9db NB |
1694 | * sequences at this point. |
1695 | */ | |
1696 | if (transport_check_aborted_status(cmd, 1) != 0) | |
1697 | return 0; | |
1698 | ||
f7a5cc0b | 1699 | transport_add_cmd_to_queue(cmd, TRANSPORT_PROCESS_WRITE, false); |
c66ac9db NB |
1700 | return 0; |
1701 | } | |
1702 | EXPORT_SYMBOL(transport_generic_handle_data); | |
1703 | ||
1704 | /* transport_generic_handle_tmr(): | |
1705 | * | |
1706 | * | |
1707 | */ | |
1708 | int transport_generic_handle_tmr( | |
1709 | struct se_cmd *cmd) | |
1710 | { | |
f7a5cc0b | 1711 | transport_add_cmd_to_queue(cmd, TRANSPORT_PROCESS_TMR, false); |
c66ac9db NB |
1712 | return 0; |
1713 | } | |
1714 | EXPORT_SYMBOL(transport_generic_handle_tmr); | |
1715 | ||
cdbb70bb CH |
1716 | /* |
1717 | * If the task is active, request it to be stopped and sleep until it | |
1718 | * has completed. | |
1719 | */ | |
1720 | bool target_stop_task(struct se_task *task, unsigned long *flags) | |
1721 | { | |
1722 | struct se_cmd *cmd = task->task_se_cmd; | |
1723 | bool was_active = false; | |
1724 | ||
1725 | if (task->task_flags & TF_ACTIVE) { | |
1726 | task->task_flags |= TF_REQUEST_STOP; | |
1727 | spin_unlock_irqrestore(&cmd->t_state_lock, *flags); | |
1728 | ||
1729 | pr_debug("Task %p waiting to complete\n", task); | |
1730 | wait_for_completion(&task->task_stop_comp); | |
1731 | pr_debug("Task %p stopped successfully\n", task); | |
1732 | ||
1733 | spin_lock_irqsave(&cmd->t_state_lock, *flags); | |
1734 | atomic_dec(&cmd->t_task_cdbs_left); | |
1735 | task->task_flags &= ~(TF_ACTIVE | TF_REQUEST_STOP); | |
1736 | was_active = true; | |
1737 | } | |
1738 | ||
cdbb70bb CH |
1739 | return was_active; |
1740 | } | |
1741 | ||
c66ac9db NB |
1742 | static int transport_stop_tasks_for_cmd(struct se_cmd *cmd) |
1743 | { | |
1744 | struct se_task *task, *task_tmp; | |
1745 | unsigned long flags; | |
1746 | int ret = 0; | |
1747 | ||
6708bb27 | 1748 | pr_debug("ITT[0x%08x] - Stopping tasks\n", |
e3d6f909 | 1749 | cmd->se_tfo->get_task_tag(cmd)); |
c66ac9db NB |
1750 | |
1751 | /* | |
1752 | * No tasks remain in the execution queue | |
1753 | */ | |
a1d8b49a | 1754 | spin_lock_irqsave(&cmd->t_state_lock, flags); |
c66ac9db | 1755 | list_for_each_entry_safe(task, task_tmp, |
a1d8b49a | 1756 | &cmd->t_task_list, t_list) { |
04629b7b | 1757 | pr_debug("Processing task %p\n", task); |
c66ac9db NB |
1758 | /* |
1759 | * If the struct se_task has not been sent and is not active, | |
1760 | * remove the struct se_task from the execution queue. | |
1761 | */ | |
6c76bf95 | 1762 | if (!(task->task_flags & (TF_ACTIVE | TF_SENT))) { |
a1d8b49a | 1763 | spin_unlock_irqrestore(&cmd->t_state_lock, |
c66ac9db NB |
1764 | flags); |
1765 | transport_remove_task_from_execute_queue(task, | |
42bf829e | 1766 | cmd->se_dev); |
c66ac9db | 1767 | |
04629b7b | 1768 | pr_debug("Task %p removed from execute queue\n", task); |
a1d8b49a | 1769 | spin_lock_irqsave(&cmd->t_state_lock, flags); |
c66ac9db NB |
1770 | continue; |
1771 | } | |
1772 | ||
cdbb70bb | 1773 | if (!target_stop_task(task, &flags)) { |
04629b7b | 1774 | pr_debug("Task %p - did nothing\n", task); |
c66ac9db NB |
1775 | ret++; |
1776 | } | |
c66ac9db | 1777 | } |
a1d8b49a | 1778 | spin_unlock_irqrestore(&cmd->t_state_lock, flags); |
c66ac9db NB |
1779 | |
1780 | return ret; | |
1781 | } | |
1782 | ||
c66ac9db NB |
1783 | /* |
1784 | * Handle SAM-esque emulation for generic transport request failures. | |
1785 | */ | |
03e98c9e | 1786 | static void transport_generic_request_failure(struct se_cmd *cmd) |
c66ac9db | 1787 | { |
07bde79a NB |
1788 | int ret = 0; |
1789 | ||
6708bb27 | 1790 | pr_debug("-----[ Storage Engine Exception for cmd: %p ITT: 0x%08x" |
e3d6f909 | 1791 | " CDB: 0x%02x\n", cmd, cmd->se_tfo->get_task_tag(cmd), |
a1d8b49a | 1792 | cmd->t_task_cdb[0]); |
03e98c9e | 1793 | pr_debug("-----[ i_state: %d t_state: %d scsi_sense_reason: %d\n", |
e3d6f909 | 1794 | cmd->se_tfo->get_cmd_state(cmd), |
03e98c9e | 1795 | cmd->t_state, cmd->scsi_sense_reason); |
6708bb27 | 1796 | pr_debug("-----[ t_tasks: %d t_task_cdbs_left: %d" |
c66ac9db NB |
1797 | " t_task_cdbs_sent: %d t_task_cdbs_ex_left: %d --" |
1798 | " t_transport_active: %d t_transport_stop: %d" | |
6708bb27 | 1799 | " t_transport_sent: %d\n", cmd->t_task_list_num, |
a1d8b49a AG |
1800 | atomic_read(&cmd->t_task_cdbs_left), |
1801 | atomic_read(&cmd->t_task_cdbs_sent), | |
1802 | atomic_read(&cmd->t_task_cdbs_ex_left), | |
1803 | atomic_read(&cmd->t_transport_active), | |
1804 | atomic_read(&cmd->t_transport_stop), | |
1805 | atomic_read(&cmd->t_transport_sent)); | |
c66ac9db | 1806 | |
c66ac9db NB |
1807 | /* |
1808 | * For SAM Task Attribute emulation for failed struct se_cmd | |
1809 | */ | |
1810 | if (cmd->se_dev->dev_task_attr_type == SAM_TASK_ATTR_EMULATED) | |
1811 | transport_complete_task_attr(cmd); | |
1812 | ||
03e98c9e NB |
1813 | switch (cmd->scsi_sense_reason) { |
1814 | case TCM_NON_EXISTENT_LUN: | |
1815 | case TCM_UNSUPPORTED_SCSI_OPCODE: | |
1816 | case TCM_INVALID_CDB_FIELD: | |
1817 | case TCM_INVALID_PARAMETER_LIST: | |
1818 | case TCM_LOGICAL_UNIT_COMMUNICATION_FAILURE: | |
1819 | case TCM_UNKNOWN_MODE_PAGE: | |
1820 | case TCM_WRITE_PROTECTED: | |
1821 | case TCM_CHECK_CONDITION_ABORT_CMD: | |
1822 | case TCM_CHECK_CONDITION_UNIT_ATTENTION: | |
1823 | case TCM_CHECK_CONDITION_NOT_READY: | |
c66ac9db | 1824 | break; |
03e98c9e | 1825 | case TCM_RESERVATION_CONFLICT: |
c66ac9db NB |
1826 | /* |
1827 | * No SENSE Data payload for this case, set SCSI Status | |
1828 | * and queue the response to $FABRIC_MOD. | |
1829 | * | |
1830 | * Uses linux/include/scsi/scsi.h SAM status codes defs | |
1831 | */ | |
1832 | cmd->scsi_status = SAM_STAT_RESERVATION_CONFLICT; | |
1833 | /* | |
1834 | * For UA Interlock Code 11b, a RESERVATION CONFLICT will | |
1835 | * establish a UNIT ATTENTION with PREVIOUS RESERVATION | |
1836 | * CONFLICT STATUS. | |
1837 | * | |
1838 | * See spc4r17, section 7.4.6 Control Mode Page, Table 349 | |
1839 | */ | |
e3d6f909 AG |
1840 | if (cmd->se_sess && |
1841 | cmd->se_dev->se_sub_dev->se_dev_attrib.emulate_ua_intlck_ctrl == 2) | |
1842 | core_scsi3_ua_allocate(cmd->se_sess->se_node_acl, | |
c66ac9db NB |
1843 | cmd->orig_fe_lun, 0x2C, |
1844 | ASCQ_2CH_PREVIOUS_RESERVATION_CONFLICT_STATUS); | |
1845 | ||
07bde79a | 1846 | ret = cmd->se_tfo->queue_status(cmd); |
f147abb4 | 1847 | if (ret == -EAGAIN || ret == -ENOMEM) |
07bde79a | 1848 | goto queue_full; |
c66ac9db | 1849 | goto check_stop; |
c66ac9db | 1850 | default: |
6708bb27 | 1851 | pr_err("Unknown transport error for CDB 0x%02x: %d\n", |
03e98c9e | 1852 | cmd->t_task_cdb[0], cmd->scsi_sense_reason); |
c66ac9db NB |
1853 | cmd->scsi_sense_reason = TCM_UNSUPPORTED_SCSI_OPCODE; |
1854 | break; | |
1855 | } | |
16ab8e60 NB |
1856 | /* |
1857 | * If a fabric does not define a cmd->se_tfo->new_cmd_map caller, | |
1858 | * make the call to transport_send_check_condition_and_sense() | |
1859 | * directly. Otherwise expect the fabric to make the call to | |
1860 | * transport_send_check_condition_and_sense() after handling | |
1861 | * possible unsoliticied write data payloads. | |
1862 | */ | |
03e98c9e NB |
1863 | ret = transport_send_check_condition_and_sense(cmd, |
1864 | cmd->scsi_sense_reason, 0); | |
1865 | if (ret == -EAGAIN || ret == -ENOMEM) | |
1866 | goto queue_full; | |
07bde79a | 1867 | |
c66ac9db NB |
1868 | check_stop: |
1869 | transport_lun_remove_cmd(cmd); | |
6708bb27 | 1870 | if (!transport_cmd_check_stop_to_fabric(cmd)) |
c66ac9db | 1871 | ; |
07bde79a NB |
1872 | return; |
1873 | ||
1874 | queue_full: | |
e057f533 CH |
1875 | cmd->t_state = TRANSPORT_COMPLETE_QF_OK; |
1876 | transport_handle_queue_full(cmd, cmd->se_dev); | |
c66ac9db NB |
1877 | } |
1878 | ||
c66ac9db NB |
1879 | static inline u32 transport_lba_21(unsigned char *cdb) |
1880 | { | |
1881 | return ((cdb[1] & 0x1f) << 16) | (cdb[2] << 8) | cdb[3]; | |
1882 | } | |
1883 | ||
1884 | static inline u32 transport_lba_32(unsigned char *cdb) | |
1885 | { | |
1886 | return (cdb[2] << 24) | (cdb[3] << 16) | (cdb[4] << 8) | cdb[5]; | |
1887 | } | |
1888 | ||
1889 | static inline unsigned long long transport_lba_64(unsigned char *cdb) | |
1890 | { | |
1891 | unsigned int __v1, __v2; | |
1892 | ||
1893 | __v1 = (cdb[2] << 24) | (cdb[3] << 16) | (cdb[4] << 8) | cdb[5]; | |
1894 | __v2 = (cdb[6] << 24) | (cdb[7] << 16) | (cdb[8] << 8) | cdb[9]; | |
1895 | ||
1896 | return ((unsigned long long)__v2) | (unsigned long long)__v1 << 32; | |
1897 | } | |
1898 | ||
1899 | /* | |
1900 | * For VARIABLE_LENGTH_CDB w/ 32 byte extended CDBs | |
1901 | */ | |
1902 | static inline unsigned long long transport_lba_64_ext(unsigned char *cdb) | |
1903 | { | |
1904 | unsigned int __v1, __v2; | |
1905 | ||
1906 | __v1 = (cdb[12] << 24) | (cdb[13] << 16) | (cdb[14] << 8) | cdb[15]; | |
1907 | __v2 = (cdb[16] << 24) | (cdb[17] << 16) | (cdb[18] << 8) | cdb[19]; | |
1908 | ||
1909 | return ((unsigned long long)__v2) | (unsigned long long)__v1 << 32; | |
1910 | } | |
1911 | ||
1912 | static void transport_set_supported_SAM_opcode(struct se_cmd *se_cmd) | |
1913 | { | |
1914 | unsigned long flags; | |
1915 | ||
a1d8b49a | 1916 | spin_lock_irqsave(&se_cmd->t_state_lock, flags); |
c66ac9db | 1917 | se_cmd->se_cmd_flags |= SCF_SUPPORTED_SAM_OPCODE; |
a1d8b49a | 1918 | spin_unlock_irqrestore(&se_cmd->t_state_lock, flags); |
c66ac9db NB |
1919 | } |
1920 | ||
c66ac9db NB |
1921 | static inline int transport_tcq_window_closed(struct se_device *dev) |
1922 | { | |
1923 | if (dev->dev_tcq_window_closed++ < | |
1924 | PYX_TRANSPORT_WINDOW_CLOSED_THRESHOLD) { | |
1925 | msleep(PYX_TRANSPORT_WINDOW_CLOSED_WAIT_SHORT); | |
1926 | } else | |
1927 | msleep(PYX_TRANSPORT_WINDOW_CLOSED_WAIT_LONG); | |
1928 | ||
e3d6f909 | 1929 | wake_up_interruptible(&dev->dev_queue_obj.thread_wq); |
c66ac9db NB |
1930 | return 0; |
1931 | } | |
1932 | ||
1933 | /* | |
1934 | * Called from Fabric Module context from transport_execute_tasks() | |
1935 | * | |
1936 | * The return of this function determins if the tasks from struct se_cmd | |
1937 | * get added to the execution queue in transport_execute_tasks(), | |
1938 | * or are added to the delayed or ordered lists here. | |
1939 | */ | |
1940 | static inline int transport_execute_task_attr(struct se_cmd *cmd) | |
1941 | { | |
5951146d | 1942 | if (cmd->se_dev->dev_task_attr_type != SAM_TASK_ATTR_EMULATED) |
c66ac9db NB |
1943 | return 1; |
1944 | /* | |
25985edc | 1945 | * Check for the existence of HEAD_OF_QUEUE, and if true return 1 |
c66ac9db NB |
1946 | * to allow the passed struct se_cmd list of tasks to the front of the list. |
1947 | */ | |
e66ecd50 | 1948 | if (cmd->sam_task_attr == MSG_HEAD_TAG) { |
6708bb27 | 1949 | pr_debug("Added HEAD_OF_QUEUE for CDB:" |
c66ac9db | 1950 | " 0x%02x, se_ordered_id: %u\n", |
6708bb27 | 1951 | cmd->t_task_cdb[0], |
c66ac9db NB |
1952 | cmd->se_ordered_id); |
1953 | return 1; | |
e66ecd50 | 1954 | } else if (cmd->sam_task_attr == MSG_ORDERED_TAG) { |
5951146d | 1955 | atomic_inc(&cmd->se_dev->dev_ordered_sync); |
c66ac9db NB |
1956 | smp_mb__after_atomic_inc(); |
1957 | ||
6708bb27 | 1958 | pr_debug("Added ORDERED for CDB: 0x%02x to ordered" |
c66ac9db | 1959 | " list, se_ordered_id: %u\n", |
a1d8b49a | 1960 | cmd->t_task_cdb[0], |
c66ac9db NB |
1961 | cmd->se_ordered_id); |
1962 | /* | |
1963 | * Add ORDERED command to tail of execution queue if | |
1964 | * no other older commands exist that need to be | |
1965 | * completed first. | |
1966 | */ | |
6708bb27 | 1967 | if (!atomic_read(&cmd->se_dev->simple_cmds)) |
c66ac9db NB |
1968 | return 1; |
1969 | } else { | |
1970 | /* | |
1971 | * For SIMPLE and UNTAGGED Task Attribute commands | |
1972 | */ | |
5951146d | 1973 | atomic_inc(&cmd->se_dev->simple_cmds); |
c66ac9db NB |
1974 | smp_mb__after_atomic_inc(); |
1975 | } | |
1976 | /* | |
1977 | * Otherwise if one or more outstanding ORDERED task attribute exist, | |
1978 | * add the dormant task(s) built for the passed struct se_cmd to the | |
1979 | * execution queue and become in Active state for this struct se_device. | |
1980 | */ | |
5951146d | 1981 | if (atomic_read(&cmd->se_dev->dev_ordered_sync) != 0) { |
c66ac9db NB |
1982 | /* |
1983 | * Otherwise, add cmd w/ tasks to delayed cmd queue that | |
25985edc | 1984 | * will be drained upon completion of HEAD_OF_QUEUE task. |
c66ac9db | 1985 | */ |
5951146d | 1986 | spin_lock(&cmd->se_dev->delayed_cmd_lock); |
c66ac9db | 1987 | cmd->se_cmd_flags |= SCF_DELAYED_CMD_FROM_SAM_ATTR; |
5951146d AG |
1988 | list_add_tail(&cmd->se_delayed_node, |
1989 | &cmd->se_dev->delayed_cmd_list); | |
1990 | spin_unlock(&cmd->se_dev->delayed_cmd_lock); | |
c66ac9db | 1991 | |
6708bb27 | 1992 | pr_debug("Added CDB: 0x%02x Task Attr: 0x%02x to" |
c66ac9db | 1993 | " delayed CMD list, se_ordered_id: %u\n", |
a1d8b49a | 1994 | cmd->t_task_cdb[0], cmd->sam_task_attr, |
c66ac9db NB |
1995 | cmd->se_ordered_id); |
1996 | /* | |
1997 | * Return zero to let transport_execute_tasks() know | |
1998 | * not to add the delayed tasks to the execution list. | |
1999 | */ | |
2000 | return 0; | |
2001 | } | |
2002 | /* | |
2003 | * Otherwise, no ORDERED task attributes exist.. | |
2004 | */ | |
2005 | return 1; | |
2006 | } | |
2007 | ||
2008 | /* | |
2009 | * Called from fabric module context in transport_generic_new_cmd() and | |
2010 | * transport_generic_process_write() | |
2011 | */ | |
2012 | static int transport_execute_tasks(struct se_cmd *cmd) | |
2013 | { | |
2014 | int add_tasks; | |
2015 | ||
58a2801a | 2016 | if (se_dev_check_online(cmd->se_dev) != 0) { |
03e98c9e NB |
2017 | cmd->scsi_sense_reason = TCM_LOGICAL_UNIT_COMMUNICATION_FAILURE; |
2018 | transport_generic_request_failure(cmd); | |
db1620a2 | 2019 | return 0; |
c66ac9db | 2020 | } |
db1620a2 | 2021 | |
c66ac9db NB |
2022 | /* |
2023 | * Call transport_cmd_check_stop() to see if a fabric exception | |
25985edc | 2024 | * has occurred that prevents execution. |
c66ac9db | 2025 | */ |
6708bb27 | 2026 | if (!transport_cmd_check_stop(cmd, 0, TRANSPORT_PROCESSING)) { |
c66ac9db NB |
2027 | /* |
2028 | * Check for SAM Task Attribute emulation and HEAD_OF_QUEUE | |
2029 | * attribute for the tasks of the received struct se_cmd CDB | |
2030 | */ | |
2031 | add_tasks = transport_execute_task_attr(cmd); | |
e3d6f909 | 2032 | if (!add_tasks) |
c66ac9db NB |
2033 | goto execute_tasks; |
2034 | /* | |
2035 | * This calls transport_add_tasks_from_cmd() to handle | |
2036 | * HEAD_OF_QUEUE ordering for SAM Task Attribute emulation | |
2037 | * (if enabled) in __transport_add_task_to_execute_queue() and | |
2038 | * transport_add_task_check_sam_attr(). | |
2039 | */ | |
2040 | transport_add_tasks_from_cmd(cmd); | |
2041 | } | |
2042 | /* | |
2043 | * Kick the execution queue for the cmd associated struct se_device | |
2044 | * storage object. | |
2045 | */ | |
2046 | execute_tasks: | |
5951146d | 2047 | __transport_execute_tasks(cmd->se_dev); |
c66ac9db NB |
2048 | return 0; |
2049 | } | |
2050 | ||
2051 | /* | |
2052 | * Called to check struct se_device tcq depth window, and once open pull struct se_task | |
2053 | * from struct se_device->execute_task_list and | |
2054 | * | |
2055 | * Called from transport_processing_thread() | |
2056 | */ | |
2057 | static int __transport_execute_tasks(struct se_device *dev) | |
2058 | { | |
2059 | int error; | |
2060 | struct se_cmd *cmd = NULL; | |
e3d6f909 | 2061 | struct se_task *task = NULL; |
c66ac9db NB |
2062 | unsigned long flags; |
2063 | ||
2064 | /* | |
2065 | * Check if there is enough room in the device and HBA queue to send | |
a1d8b49a | 2066 | * struct se_tasks to the selected transport. |
c66ac9db NB |
2067 | */ |
2068 | check_depth: | |
e3d6f909 | 2069 | if (!atomic_read(&dev->depth_left)) |
c66ac9db | 2070 | return transport_tcq_window_closed(dev); |
c66ac9db | 2071 | |
e3d6f909 | 2072 | dev->dev_tcq_window_closed = 0; |
c66ac9db | 2073 | |
e3d6f909 AG |
2074 | spin_lock_irq(&dev->execute_task_lock); |
2075 | if (list_empty(&dev->execute_task_list)) { | |
2076 | spin_unlock_irq(&dev->execute_task_lock); | |
c66ac9db NB |
2077 | return 0; |
2078 | } | |
e3d6f909 AG |
2079 | task = list_first_entry(&dev->execute_task_list, |
2080 | struct se_task, t_execute_list); | |
04629b7b | 2081 | __transport_remove_task_from_execute_queue(task, dev); |
e3d6f909 | 2082 | spin_unlock_irq(&dev->execute_task_lock); |
c66ac9db NB |
2083 | |
2084 | atomic_dec(&dev->depth_left); | |
c66ac9db | 2085 | |
e3d6f909 | 2086 | cmd = task->task_se_cmd; |
c66ac9db | 2087 | |
a1d8b49a | 2088 | spin_lock_irqsave(&cmd->t_state_lock, flags); |
6c76bf95 | 2089 | task->task_flags |= (TF_ACTIVE | TF_SENT); |
a1d8b49a | 2090 | atomic_inc(&cmd->t_task_cdbs_sent); |
c66ac9db | 2091 | |
a1d8b49a AG |
2092 | if (atomic_read(&cmd->t_task_cdbs_sent) == |
2093 | cmd->t_task_list_num) | |
415a090a | 2094 | atomic_set(&cmd->t_transport_sent, 1); |
c66ac9db | 2095 | |
a1d8b49a | 2096 | spin_unlock_irqrestore(&cmd->t_state_lock, flags); |
c66ac9db | 2097 | |
5bda90c8 CH |
2098 | if (cmd->execute_task) |
2099 | error = cmd->execute_task(task); | |
2100 | else | |
2101 | error = dev->transport->do_task(task); | |
d29a5b6a | 2102 | if (error != 0) { |
d29a5b6a CH |
2103 | spin_lock_irqsave(&cmd->t_state_lock, flags); |
2104 | task->task_flags &= ~TF_ACTIVE; | |
2105 | spin_unlock_irqrestore(&cmd->t_state_lock, flags); | |
2106 | atomic_set(&cmd->t_transport_sent, 0); | |
2107 | transport_stop_tasks_for_cmd(cmd); | |
2108 | atomic_inc(&dev->depth_left); | |
03e98c9e | 2109 | transport_generic_request_failure(cmd); |
c66ac9db NB |
2110 | } |
2111 | ||
2112 | goto check_depth; | |
2113 | ||
2114 | return 0; | |
2115 | } | |
2116 | ||
c66ac9db NB |
2117 | static inline u32 transport_get_sectors_6( |
2118 | unsigned char *cdb, | |
2119 | struct se_cmd *cmd, | |
2120 | int *ret) | |
2121 | { | |
5951146d | 2122 | struct se_device *dev = cmd->se_dev; |
c66ac9db NB |
2123 | |
2124 | /* | |
2125 | * Assume TYPE_DISK for non struct se_device objects. | |
2126 | * Use 8-bit sector value. | |
2127 | */ | |
2128 | if (!dev) | |
2129 | goto type_disk; | |
2130 | ||
2131 | /* | |
2132 | * Use 24-bit allocation length for TYPE_TAPE. | |
2133 | */ | |
e3d6f909 | 2134 | if (dev->transport->get_device_type(dev) == TYPE_TAPE) |
c66ac9db NB |
2135 | return (u32)(cdb[2] << 16) + (cdb[3] << 8) + cdb[4]; |
2136 | ||
2137 | /* | |
2138 | * Everything else assume TYPE_DISK Sector CDB location. | |
9b5cd7f3 RD |
2139 | * Use 8-bit sector value. SBC-3 says: |
2140 | * | |
2141 | * A TRANSFER LENGTH field set to zero specifies that 256 | |
2142 | * logical blocks shall be written. Any other value | |
2143 | * specifies the number of logical blocks that shall be | |
2144 | * written. | |
c66ac9db NB |
2145 | */ |
2146 | type_disk: | |
9b5cd7f3 | 2147 | return cdb[4] ? : 256; |
c66ac9db NB |
2148 | } |
2149 | ||
2150 | static inline u32 transport_get_sectors_10( | |
2151 | unsigned char *cdb, | |
2152 | struct se_cmd *cmd, | |
2153 | int *ret) | |
2154 | { | |
5951146d | 2155 | struct se_device *dev = cmd->se_dev; |
c66ac9db NB |
2156 | |
2157 | /* | |
2158 | * Assume TYPE_DISK for non struct se_device objects. | |
2159 | * Use 16-bit sector value. | |
2160 | */ | |
2161 | if (!dev) | |
2162 | goto type_disk; | |
2163 | ||
2164 | /* | |
2165 | * XXX_10 is not defined in SSC, throw an exception | |
2166 | */ | |
e3d6f909 AG |
2167 | if (dev->transport->get_device_type(dev) == TYPE_TAPE) { |
2168 | *ret = -EINVAL; | |
c66ac9db NB |
2169 | return 0; |
2170 | } | |
2171 | ||
2172 | /* | |
2173 | * Everything else assume TYPE_DISK Sector CDB location. | |
2174 | * Use 16-bit sector value. | |
2175 | */ | |
2176 | type_disk: | |
2177 | return (u32)(cdb[7] << 8) + cdb[8]; | |
2178 | } | |
2179 | ||
2180 | static inline u32 transport_get_sectors_12( | |
2181 | unsigned char *cdb, | |
2182 | struct se_cmd *cmd, | |
2183 | int *ret) | |
2184 | { | |
5951146d | 2185 | struct se_device *dev = cmd->se_dev; |
c66ac9db NB |
2186 | |
2187 | /* | |
2188 | * Assume TYPE_DISK for non struct se_device objects. | |
2189 | * Use 32-bit sector value. | |
2190 | */ | |
2191 | if (!dev) | |
2192 | goto type_disk; | |
2193 | ||
2194 | /* | |
2195 | * XXX_12 is not defined in SSC, throw an exception | |
2196 | */ | |
e3d6f909 AG |
2197 | if (dev->transport->get_device_type(dev) == TYPE_TAPE) { |
2198 | *ret = -EINVAL; | |
c66ac9db NB |
2199 | return 0; |
2200 | } | |
2201 | ||
2202 | /* | |
2203 | * Everything else assume TYPE_DISK Sector CDB location. | |
2204 | * Use 32-bit sector value. | |
2205 | */ | |
2206 | type_disk: | |
2207 | return (u32)(cdb[6] << 24) + (cdb[7] << 16) + (cdb[8] << 8) + cdb[9]; | |
2208 | } | |
2209 | ||
2210 | static inline u32 transport_get_sectors_16( | |
2211 | unsigned char *cdb, | |
2212 | struct se_cmd *cmd, | |
2213 | int *ret) | |
2214 | { | |
5951146d | 2215 | struct se_device *dev = cmd->se_dev; |
c66ac9db NB |
2216 | |
2217 | /* | |
2218 | * Assume TYPE_DISK for non struct se_device objects. | |
2219 | * Use 32-bit sector value. | |
2220 | */ | |
2221 | if (!dev) | |
2222 | goto type_disk; | |
2223 | ||
2224 | /* | |
2225 | * Use 24-bit allocation length for TYPE_TAPE. | |
2226 | */ | |
e3d6f909 | 2227 | if (dev->transport->get_device_type(dev) == TYPE_TAPE) |
c66ac9db NB |
2228 | return (u32)(cdb[12] << 16) + (cdb[13] << 8) + cdb[14]; |
2229 | ||
2230 | type_disk: | |
2231 | return (u32)(cdb[10] << 24) + (cdb[11] << 16) + | |
2232 | (cdb[12] << 8) + cdb[13]; | |
2233 | } | |
2234 | ||
2235 | /* | |
2236 | * Used for VARIABLE_LENGTH_CDB WRITE_32 and READ_32 variants | |
2237 | */ | |
2238 | static inline u32 transport_get_sectors_32( | |
2239 | unsigned char *cdb, | |
2240 | struct se_cmd *cmd, | |
2241 | int *ret) | |
2242 | { | |
2243 | /* | |
2244 | * Assume TYPE_DISK for non struct se_device objects. | |
2245 | * Use 32-bit sector value. | |
2246 | */ | |
2247 | return (u32)(cdb[28] << 24) + (cdb[29] << 16) + | |
2248 | (cdb[30] << 8) + cdb[31]; | |
2249 | ||
2250 | } | |
2251 | ||
2252 | static inline u32 transport_get_size( | |
2253 | u32 sectors, | |
2254 | unsigned char *cdb, | |
2255 | struct se_cmd *cmd) | |
2256 | { | |
5951146d | 2257 | struct se_device *dev = cmd->se_dev; |
c66ac9db | 2258 | |
e3d6f909 | 2259 | if (dev->transport->get_device_type(dev) == TYPE_TAPE) { |
c66ac9db | 2260 | if (cdb[1] & 1) { /* sectors */ |
e3d6f909 | 2261 | return dev->se_sub_dev->se_dev_attrib.block_size * sectors; |
c66ac9db NB |
2262 | } else /* bytes */ |
2263 | return sectors; | |
2264 | } | |
2265 | #if 0 | |
6708bb27 | 2266 | pr_debug("Returning block_size: %u, sectors: %u == %u for" |
e3d6f909 AG |
2267 | " %s object\n", dev->se_sub_dev->se_dev_attrib.block_size, sectors, |
2268 | dev->se_sub_dev->se_dev_attrib.block_size * sectors, | |
2269 | dev->transport->name); | |
c66ac9db | 2270 | #endif |
e3d6f909 | 2271 | return dev->se_sub_dev->se_dev_attrib.block_size * sectors; |
c66ac9db NB |
2272 | } |
2273 | ||
c66ac9db NB |
2274 | static void transport_xor_callback(struct se_cmd *cmd) |
2275 | { | |
2276 | unsigned char *buf, *addr; | |
ec98f782 | 2277 | struct scatterlist *sg; |
c66ac9db NB |
2278 | unsigned int offset; |
2279 | int i; | |
ec98f782 | 2280 | int count; |
c66ac9db NB |
2281 | /* |
2282 | * From sbc3r22.pdf section 5.48 XDWRITEREAD (10) command | |
2283 | * | |
2284 | * 1) read the specified logical block(s); | |
2285 | * 2) transfer logical blocks from the data-out buffer; | |
2286 | * 3) XOR the logical blocks transferred from the data-out buffer with | |
2287 | * the logical blocks read, storing the resulting XOR data in a buffer; | |
2288 | * 4) if the DISABLE WRITE bit is set to zero, then write the logical | |
2289 | * blocks transferred from the data-out buffer; and | |
2290 | * 5) transfer the resulting XOR data to the data-in buffer. | |
2291 | */ | |
2292 | buf = kmalloc(cmd->data_length, GFP_KERNEL); | |
6708bb27 AG |
2293 | if (!buf) { |
2294 | pr_err("Unable to allocate xor_callback buf\n"); | |
c66ac9db NB |
2295 | return; |
2296 | } | |
2297 | /* | |
ec98f782 | 2298 | * Copy the scatterlist WRITE buffer located at cmd->t_data_sg |
c66ac9db NB |
2299 | * into the locally allocated *buf |
2300 | */ | |
ec98f782 AG |
2301 | sg_copy_to_buffer(cmd->t_data_sg, |
2302 | cmd->t_data_nents, | |
2303 | buf, | |
2304 | cmd->data_length); | |
2305 | ||
c66ac9db NB |
2306 | /* |
2307 | * Now perform the XOR against the BIDI read memory located at | |
a1d8b49a | 2308 | * cmd->t_mem_bidi_list |
c66ac9db NB |
2309 | */ |
2310 | ||
2311 | offset = 0; | |
ec98f782 AG |
2312 | for_each_sg(cmd->t_bidi_data_sg, sg, cmd->t_bidi_data_nents, count) { |
2313 | addr = kmap_atomic(sg_page(sg), KM_USER0); | |
2314 | if (!addr) | |
c66ac9db NB |
2315 | goto out; |
2316 | ||
ec98f782 AG |
2317 | for (i = 0; i < sg->length; i++) |
2318 | *(addr + sg->offset + i) ^= *(buf + offset + i); | |
c66ac9db | 2319 | |
ec98f782 | 2320 | offset += sg->length; |
c66ac9db NB |
2321 | kunmap_atomic(addr, KM_USER0); |
2322 | } | |
ec98f782 | 2323 | |
c66ac9db NB |
2324 | out: |
2325 | kfree(buf); | |
2326 | } | |
2327 | ||
2328 | /* | |
2329 | * Used to obtain Sense Data from underlying Linux/SCSI struct scsi_cmnd | |
2330 | */ | |
2331 | static int transport_get_sense_data(struct se_cmd *cmd) | |
2332 | { | |
2333 | unsigned char *buffer = cmd->sense_buffer, *sense_buffer = NULL; | |
42bf829e | 2334 | struct se_device *dev = cmd->se_dev; |
c66ac9db NB |
2335 | struct se_task *task = NULL, *task_tmp; |
2336 | unsigned long flags; | |
2337 | u32 offset = 0; | |
2338 | ||
e3d6f909 AG |
2339 | WARN_ON(!cmd->se_lun); |
2340 | ||
42bf829e CH |
2341 | if (!dev) |
2342 | return 0; | |
2343 | ||
a1d8b49a | 2344 | spin_lock_irqsave(&cmd->t_state_lock, flags); |
c66ac9db | 2345 | if (cmd->se_cmd_flags & SCF_SENT_CHECK_CONDITION) { |
a1d8b49a | 2346 | spin_unlock_irqrestore(&cmd->t_state_lock, flags); |
c66ac9db NB |
2347 | return 0; |
2348 | } | |
2349 | ||
2350 | list_for_each_entry_safe(task, task_tmp, | |
a1d8b49a | 2351 | &cmd->t_task_list, t_list) { |
c66ac9db NB |
2352 | if (!task->task_sense) |
2353 | continue; | |
2354 | ||
e3d6f909 | 2355 | if (!dev->transport->get_sense_buffer) { |
6708bb27 | 2356 | pr_err("dev->transport->get_sense_buffer" |
c66ac9db NB |
2357 | " is NULL\n"); |
2358 | continue; | |
2359 | } | |
2360 | ||
e3d6f909 | 2361 | sense_buffer = dev->transport->get_sense_buffer(task); |
6708bb27 | 2362 | if (!sense_buffer) { |
04629b7b | 2363 | pr_err("ITT[0x%08x]_TASK[%p]: Unable to locate" |
c66ac9db | 2364 | " sense buffer for task with sense\n", |
04629b7b | 2365 | cmd->se_tfo->get_task_tag(cmd), task); |
c66ac9db NB |
2366 | continue; |
2367 | } | |
a1d8b49a | 2368 | spin_unlock_irqrestore(&cmd->t_state_lock, flags); |
c66ac9db | 2369 | |
e3d6f909 | 2370 | offset = cmd->se_tfo->set_fabric_sense_len(cmd, |
c66ac9db NB |
2371 | TRANSPORT_SENSE_BUFFER); |
2372 | ||
5951146d | 2373 | memcpy(&buffer[offset], sense_buffer, |
c66ac9db NB |
2374 | TRANSPORT_SENSE_BUFFER); |
2375 | cmd->scsi_status = task->task_scsi_status; | |
2376 | /* Automatically padded */ | |
2377 | cmd->scsi_sense_length = | |
2378 | (TRANSPORT_SENSE_BUFFER + offset); | |
2379 | ||
6708bb27 | 2380 | pr_debug("HBA_[%u]_PLUG[%s]: Set SAM STATUS: 0x%02x" |
c66ac9db | 2381 | " and sense\n", |
e3d6f909 | 2382 | dev->se_hba->hba_id, dev->transport->name, |
c66ac9db NB |
2383 | cmd->scsi_status); |
2384 | return 0; | |
2385 | } | |
a1d8b49a | 2386 | spin_unlock_irqrestore(&cmd->t_state_lock, flags); |
c66ac9db NB |
2387 | |
2388 | return -1; | |
2389 | } | |
2390 | ||
ec98f782 AG |
2391 | static inline long long transport_dev_end_lba(struct se_device *dev) |
2392 | { | |
2393 | return dev->transport->get_blocks(dev) + 1; | |
2394 | } | |
2395 | ||
2396 | static int transport_cmd_get_valid_sectors(struct se_cmd *cmd) | |
2397 | { | |
2398 | struct se_device *dev = cmd->se_dev; | |
2399 | u32 sectors; | |
2400 | ||
2401 | if (dev->transport->get_device_type(dev) != TYPE_DISK) | |
2402 | return 0; | |
2403 | ||
2404 | sectors = (cmd->data_length / dev->se_sub_dev->se_dev_attrib.block_size); | |
2405 | ||
6708bb27 AG |
2406 | if ((cmd->t_task_lba + sectors) > transport_dev_end_lba(dev)) { |
2407 | pr_err("LBA: %llu Sectors: %u exceeds" | |
ec98f782 AG |
2408 | " transport_dev_end_lba(): %llu\n", |
2409 | cmd->t_task_lba, sectors, | |
2410 | transport_dev_end_lba(dev)); | |
7abbe7f3 | 2411 | return -EINVAL; |
ec98f782 AG |
2412 | } |
2413 | ||
7abbe7f3 | 2414 | return 0; |
ec98f782 AG |
2415 | } |
2416 | ||
706d5860 NB |
2417 | static int target_check_write_same_discard(unsigned char *flags, struct se_device *dev) |
2418 | { | |
2419 | /* | |
2420 | * Determine if the received WRITE_SAME is used to for direct | |
2421 | * passthrough into Linux/SCSI with struct request via TCM/pSCSI | |
2422 | * or we are signaling the use of internal WRITE_SAME + UNMAP=1 | |
2423 | * emulation for -> Linux/BLOCK disbard with TCM/IBLOCK code. | |
2424 | */ | |
2425 | int passthrough = (dev->transport->transport_type == | |
2426 | TRANSPORT_PLUGIN_PHBA_PDEV); | |
2427 | ||
2428 | if (!passthrough) { | |
2429 | if ((flags[0] & 0x04) || (flags[0] & 0x02)) { | |
2430 | pr_err("WRITE_SAME PBDATA and LBDATA" | |
2431 | " bits not supported for Block Discard" | |
2432 | " Emulation\n"); | |
2433 | return -ENOSYS; | |
2434 | } | |
2435 | /* | |
2436 | * Currently for the emulated case we only accept | |
2437 | * tpws with the UNMAP=1 bit set. | |
2438 | */ | |
2439 | if (!(flags[0] & 0x08)) { | |
2440 | pr_err("WRITE_SAME w/o UNMAP bit not" | |
2441 | " supported for Block Discard Emulation\n"); | |
2442 | return -ENOSYS; | |
2443 | } | |
2444 | } | |
2445 | ||
2446 | return 0; | |
2447 | } | |
2448 | ||
c66ac9db NB |
2449 | /* transport_generic_cmd_sequencer(): |
2450 | * | |
2451 | * Generic Command Sequencer that should work for most DAS transport | |
2452 | * drivers. | |
2453 | * | |
2454 | * Called from transport_generic_allocate_tasks() in the $FABRIC_MOD | |
2455 | * RX Thread. | |
2456 | * | |
2457 | * FIXME: Need to support other SCSI OPCODES where as well. | |
2458 | */ | |
2459 | static int transport_generic_cmd_sequencer( | |
2460 | struct se_cmd *cmd, | |
2461 | unsigned char *cdb) | |
2462 | { | |
5951146d | 2463 | struct se_device *dev = cmd->se_dev; |
c66ac9db NB |
2464 | struct se_subsystem_dev *su_dev = dev->se_sub_dev; |
2465 | int ret = 0, sector_ret = 0, passthrough; | |
2466 | u32 sectors = 0, size = 0, pr_reg_type = 0; | |
2467 | u16 service_action; | |
2468 | u8 alua_ascq = 0; | |
2469 | /* | |
2470 | * Check for an existing UNIT ATTENTION condition | |
2471 | */ | |
2472 | if (core_scsi3_ua_check(cmd, cdb) < 0) { | |
c66ac9db NB |
2473 | cmd->se_cmd_flags |= SCF_SCSI_CDB_EXCEPTION; |
2474 | cmd->scsi_sense_reason = TCM_CHECK_CONDITION_UNIT_ATTENTION; | |
5951146d | 2475 | return -EINVAL; |
c66ac9db NB |
2476 | } |
2477 | /* | |
2478 | * Check status of Asymmetric Logical Unit Assignment port | |
2479 | */ | |
e3d6f909 | 2480 | ret = su_dev->t10_alua.alua_state_check(cmd, cdb, &alua_ascq); |
c66ac9db | 2481 | if (ret != 0) { |
c66ac9db | 2482 | /* |
25985edc | 2483 | * Set SCSI additional sense code (ASC) to 'LUN Not Accessible'; |
c66ac9db NB |
2484 | * The ALUA additional sense code qualifier (ASCQ) is determined |
2485 | * by the ALUA primary or secondary access state.. | |
2486 | */ | |
2487 | if (ret > 0) { | |
2488 | #if 0 | |
6708bb27 | 2489 | pr_debug("[%s]: ALUA TG Port not available," |
c66ac9db | 2490 | " SenseKey: NOT_READY, ASC/ASCQ: 0x04/0x%02x\n", |
e3d6f909 | 2491 | cmd->se_tfo->get_fabric_name(), alua_ascq); |
c66ac9db NB |
2492 | #endif |
2493 | transport_set_sense_codes(cmd, 0x04, alua_ascq); | |
2494 | cmd->se_cmd_flags |= SCF_SCSI_CDB_EXCEPTION; | |
2495 | cmd->scsi_sense_reason = TCM_CHECK_CONDITION_NOT_READY; | |
5951146d | 2496 | return -EINVAL; |
c66ac9db NB |
2497 | } |
2498 | goto out_invalid_cdb_field; | |
2499 | } | |
2500 | /* | |
2501 | * Check status for SPC-3 Persistent Reservations | |
2502 | */ | |
e3d6f909 AG |
2503 | if (su_dev->t10_pr.pr_ops.t10_reservation_check(cmd, &pr_reg_type) != 0) { |
2504 | if (su_dev->t10_pr.pr_ops.t10_seq_non_holder( | |
03e98c9e NB |
2505 | cmd, cdb, pr_reg_type) != 0) { |
2506 | cmd->se_cmd_flags |= SCF_SCSI_CDB_EXCEPTION; | |
2507 | cmd->se_cmd_flags |= SCF_SCSI_RESERVATION_CONFLICT; | |
2508 | cmd->scsi_sense_reason = TCM_RESERVATION_CONFLICT; | |
2509 | return -EBUSY; | |
2510 | } | |
c66ac9db NB |
2511 | /* |
2512 | * This means the CDB is allowed for the SCSI Initiator port | |
2513 | * when said port is *NOT* holding the legacy SPC-2 or | |
2514 | * SPC-3 Persistent Reservation. | |
2515 | */ | |
2516 | } | |
2517 | ||
5bda90c8 CH |
2518 | /* |
2519 | * If we operate in passthrough mode we skip most CDB emulation and | |
2520 | * instead hand the commands down to the physical SCSI device. | |
2521 | */ | |
2522 | passthrough = | |
2523 | (dev->transport->transport_type == TRANSPORT_PLUGIN_PHBA_PDEV); | |
2524 | ||
c66ac9db NB |
2525 | switch (cdb[0]) { |
2526 | case READ_6: | |
2527 | sectors = transport_get_sectors_6(cdb, cmd, §or_ret); | |
2528 | if (sector_ret) | |
2529 | goto out_unsupported_cdb; | |
2530 | size = transport_get_size(sectors, cdb, cmd); | |
a1d8b49a | 2531 | cmd->t_task_lba = transport_lba_21(cdb); |
c66ac9db NB |
2532 | cmd->se_cmd_flags |= SCF_SCSI_DATA_SG_IO_CDB; |
2533 | break; | |
2534 | case READ_10: | |
2535 | sectors = transport_get_sectors_10(cdb, cmd, §or_ret); | |
2536 | if (sector_ret) | |
2537 | goto out_unsupported_cdb; | |
2538 | size = transport_get_size(sectors, cdb, cmd); | |
a1d8b49a | 2539 | cmd->t_task_lba = transport_lba_32(cdb); |
c66ac9db NB |
2540 | cmd->se_cmd_flags |= SCF_SCSI_DATA_SG_IO_CDB; |
2541 | break; | |
2542 | case READ_12: | |
2543 | sectors = transport_get_sectors_12(cdb, cmd, §or_ret); | |
2544 | if (sector_ret) | |
2545 | goto out_unsupported_cdb; | |
2546 | size = transport_get_size(sectors, cdb, cmd); | |
a1d8b49a | 2547 | cmd->t_task_lba = transport_lba_32(cdb); |
c66ac9db NB |
2548 | cmd->se_cmd_flags |= SCF_SCSI_DATA_SG_IO_CDB; |
2549 | break; | |
2550 | case READ_16: | |
2551 | sectors = transport_get_sectors_16(cdb, cmd, §or_ret); | |
2552 | if (sector_ret) | |
2553 | goto out_unsupported_cdb; | |
2554 | size = transport_get_size(sectors, cdb, cmd); | |
a1d8b49a | 2555 | cmd->t_task_lba = transport_lba_64(cdb); |
c66ac9db NB |
2556 | cmd->se_cmd_flags |= SCF_SCSI_DATA_SG_IO_CDB; |
2557 | break; | |
2558 | case WRITE_6: | |
2559 | sectors = transport_get_sectors_6(cdb, cmd, §or_ret); | |
2560 | if (sector_ret) | |
2561 | goto out_unsupported_cdb; | |
2562 | size = transport_get_size(sectors, cdb, cmd); | |
a1d8b49a | 2563 | cmd->t_task_lba = transport_lba_21(cdb); |
c66ac9db NB |
2564 | cmd->se_cmd_flags |= SCF_SCSI_DATA_SG_IO_CDB; |
2565 | break; | |
2566 | case WRITE_10: | |
2567 | sectors = transport_get_sectors_10(cdb, cmd, §or_ret); | |
2568 | if (sector_ret) | |
2569 | goto out_unsupported_cdb; | |
2570 | size = transport_get_size(sectors, cdb, cmd); | |
a1d8b49a | 2571 | cmd->t_task_lba = transport_lba_32(cdb); |
2d3a4b51 CH |
2572 | if (cdb[1] & 0x8) |
2573 | cmd->se_cmd_flags |= SCF_FUA; | |
c66ac9db NB |
2574 | cmd->se_cmd_flags |= SCF_SCSI_DATA_SG_IO_CDB; |
2575 | break; | |
2576 | case WRITE_12: | |
2577 | sectors = transport_get_sectors_12(cdb, cmd, §or_ret); | |
2578 | if (sector_ret) | |
2579 | goto out_unsupported_cdb; | |
2580 | size = transport_get_size(sectors, cdb, cmd); | |
a1d8b49a | 2581 | cmd->t_task_lba = transport_lba_32(cdb); |
2d3a4b51 CH |
2582 | if (cdb[1] & 0x8) |
2583 | cmd->se_cmd_flags |= SCF_FUA; | |
c66ac9db NB |
2584 | cmd->se_cmd_flags |= SCF_SCSI_DATA_SG_IO_CDB; |
2585 | break; | |
2586 | case WRITE_16: | |
2587 | sectors = transport_get_sectors_16(cdb, cmd, §or_ret); | |
2588 | if (sector_ret) | |
2589 | goto out_unsupported_cdb; | |
2590 | size = transport_get_size(sectors, cdb, cmd); | |
a1d8b49a | 2591 | cmd->t_task_lba = transport_lba_64(cdb); |
2d3a4b51 CH |
2592 | if (cdb[1] & 0x8) |
2593 | cmd->se_cmd_flags |= SCF_FUA; | |
c66ac9db NB |
2594 | cmd->se_cmd_flags |= SCF_SCSI_DATA_SG_IO_CDB; |
2595 | break; | |
2596 | case XDWRITEREAD_10: | |
2597 | if ((cmd->data_direction != DMA_TO_DEVICE) || | |
33c3fafc | 2598 | !(cmd->se_cmd_flags & SCF_BIDI)) |
c66ac9db NB |
2599 | goto out_invalid_cdb_field; |
2600 | sectors = transport_get_sectors_10(cdb, cmd, §or_ret); | |
2601 | if (sector_ret) | |
2602 | goto out_unsupported_cdb; | |
2603 | size = transport_get_size(sectors, cdb, cmd); | |
a1d8b49a | 2604 | cmd->t_task_lba = transport_lba_32(cdb); |
c66ac9db | 2605 | cmd->se_cmd_flags |= SCF_SCSI_DATA_SG_IO_CDB; |
7c1c6af3 | 2606 | |
5bda90c8 CH |
2607 | /* |
2608 | * Do now allow BIDI commands for passthrough mode. | |
2609 | */ | |
2610 | if (passthrough) | |
7c1c6af3 | 2611 | goto out_unsupported_cdb; |
5bda90c8 | 2612 | |
c66ac9db | 2613 | /* |
35e0e757 | 2614 | * Setup BIDI XOR callback to be run after I/O completion. |
c66ac9db NB |
2615 | */ |
2616 | cmd->transport_complete_callback = &transport_xor_callback; | |
2d3a4b51 CH |
2617 | if (cdb[1] & 0x8) |
2618 | cmd->se_cmd_flags |= SCF_FUA; | |
c66ac9db NB |
2619 | break; |
2620 | case VARIABLE_LENGTH_CMD: | |
2621 | service_action = get_unaligned_be16(&cdb[8]); | |
c66ac9db NB |
2622 | switch (service_action) { |
2623 | case XDWRITEREAD_32: | |
2624 | sectors = transport_get_sectors_32(cdb, cmd, §or_ret); | |
2625 | if (sector_ret) | |
2626 | goto out_unsupported_cdb; | |
2627 | size = transport_get_size(sectors, cdb, cmd); | |
2628 | /* | |
2629 | * Use WRITE_32 and READ_32 opcodes for the emulated | |
2630 | * XDWRITE_READ_32 logic. | |
2631 | */ | |
a1d8b49a | 2632 | cmd->t_task_lba = transport_lba_64_ext(cdb); |
c66ac9db NB |
2633 | cmd->se_cmd_flags |= SCF_SCSI_DATA_SG_IO_CDB; |
2634 | ||
5bda90c8 CH |
2635 | /* |
2636 | * Do now allow BIDI commands for passthrough mode. | |
2637 | */ | |
c66ac9db | 2638 | if (passthrough) |
7c1c6af3 | 2639 | goto out_unsupported_cdb; |
5bda90c8 | 2640 | |
c66ac9db | 2641 | /* |
35e0e757 CH |
2642 | * Setup BIDI XOR callback to be run during after I/O |
2643 | * completion. | |
c66ac9db NB |
2644 | */ |
2645 | cmd->transport_complete_callback = &transport_xor_callback; | |
2d3a4b51 CH |
2646 | if (cdb[1] & 0x8) |
2647 | cmd->se_cmd_flags |= SCF_FUA; | |
c66ac9db NB |
2648 | break; |
2649 | case WRITE_SAME_32: | |
2650 | sectors = transport_get_sectors_32(cdb, cmd, §or_ret); | |
2651 | if (sector_ret) | |
2652 | goto out_unsupported_cdb; | |
dd3a5ad8 | 2653 | |
6708bb27 | 2654 | if (sectors) |
12850626 | 2655 | size = transport_get_size(1, cdb, cmd); |
6708bb27 AG |
2656 | else { |
2657 | pr_err("WSNZ=1, WRITE_SAME w/sectors=0 not" | |
2658 | " supported\n"); | |
2659 | goto out_invalid_cdb_field; | |
2660 | } | |
dd3a5ad8 | 2661 | |
a1d8b49a | 2662 | cmd->t_task_lba = get_unaligned_be64(&cdb[12]); |
c66ac9db NB |
2663 | cmd->se_cmd_flags |= SCF_SCSI_CONTROL_SG_IO_CDB; |
2664 | ||
706d5860 | 2665 | if (target_check_write_same_discard(&cdb[10], dev) < 0) |
c66ac9db | 2666 | goto out_invalid_cdb_field; |
5bda90c8 CH |
2667 | if (!passthrough) |
2668 | cmd->execute_task = target_emulate_write_same; | |
c66ac9db NB |
2669 | break; |
2670 | default: | |
6708bb27 | 2671 | pr_err("VARIABLE_LENGTH_CMD service action" |
c66ac9db NB |
2672 | " 0x%04x not supported\n", service_action); |
2673 | goto out_unsupported_cdb; | |
2674 | } | |
2675 | break; | |
e434f1f1 | 2676 | case MAINTENANCE_IN: |
e3d6f909 | 2677 | if (dev->transport->get_device_type(dev) != TYPE_ROM) { |
c66ac9db NB |
2678 | /* MAINTENANCE_IN from SCC-2 */ |
2679 | /* | |
2680 | * Check for emulated MI_REPORT_TARGET_PGS. | |
2681 | */ | |
e76a35d6 CH |
2682 | if (cdb[1] == MI_REPORT_TARGET_PGS && |
2683 | su_dev->t10_alua.alua_type == SPC3_ALUA_EMULATED) { | |
2684 | cmd->execute_task = | |
2685 | target_emulate_report_target_port_groups; | |
c66ac9db NB |
2686 | } |
2687 | size = (cdb[6] << 24) | (cdb[7] << 16) | | |
2688 | (cdb[8] << 8) | cdb[9]; | |
2689 | } else { | |
2690 | /* GPCMD_SEND_KEY from multi media commands */ | |
2691 | size = (cdb[8] << 8) + cdb[9]; | |
2692 | } | |
05d1c7c0 | 2693 | cmd->se_cmd_flags |= SCF_SCSI_CONTROL_SG_IO_CDB; |
c66ac9db NB |
2694 | break; |
2695 | case MODE_SELECT: | |
2696 | size = cdb[4]; | |
2697 | cmd->se_cmd_flags |= SCF_SCSI_CONTROL_SG_IO_CDB; | |
2698 | break; | |
2699 | case MODE_SELECT_10: | |
2700 | size = (cdb[7] << 8) + cdb[8]; | |
2701 | cmd->se_cmd_flags |= SCF_SCSI_CONTROL_SG_IO_CDB; | |
2702 | break; | |
2703 | case MODE_SENSE: | |
2704 | size = cdb[4]; | |
05d1c7c0 | 2705 | cmd->se_cmd_flags |= SCF_SCSI_CONTROL_SG_IO_CDB; |
5bda90c8 CH |
2706 | if (!passthrough) |
2707 | cmd->execute_task = target_emulate_modesense; | |
c66ac9db NB |
2708 | break; |
2709 | case MODE_SENSE_10: | |
5bda90c8 CH |
2710 | size = (cdb[7] << 8) + cdb[8]; |
2711 | cmd->se_cmd_flags |= SCF_SCSI_CONTROL_SG_IO_CDB; | |
2712 | if (!passthrough) | |
2713 | cmd->execute_task = target_emulate_modesense; | |
2714 | break; | |
c66ac9db NB |
2715 | case GPCMD_READ_BUFFER_CAPACITY: |
2716 | case GPCMD_SEND_OPC: | |
2717 | case LOG_SELECT: | |
2718 | case LOG_SENSE: | |
2719 | size = (cdb[7] << 8) + cdb[8]; | |
05d1c7c0 | 2720 | cmd->se_cmd_flags |= SCF_SCSI_CONTROL_SG_IO_CDB; |
c66ac9db NB |
2721 | break; |
2722 | case READ_BLOCK_LIMITS: | |
2723 | size = READ_BLOCK_LEN; | |
05d1c7c0 | 2724 | cmd->se_cmd_flags |= SCF_SCSI_CONTROL_SG_IO_CDB; |
c66ac9db NB |
2725 | break; |
2726 | case GPCMD_GET_CONFIGURATION: | |
2727 | case GPCMD_READ_FORMAT_CAPACITIES: | |
2728 | case GPCMD_READ_DISC_INFO: | |
2729 | case GPCMD_READ_TRACK_RZONE_INFO: | |
2730 | size = (cdb[7] << 8) + cdb[8]; | |
2731 | cmd->se_cmd_flags |= SCF_SCSI_CONTROL_SG_IO_CDB; | |
2732 | break; | |
2733 | case PERSISTENT_RESERVE_IN: | |
617c0e06 | 2734 | if (su_dev->t10_pr.res_type == SPC3_PERSISTENT_RESERVATIONS) |
e76a35d6 | 2735 | cmd->execute_task = target_scsi3_emulate_pr_in; |
617c0e06 CH |
2736 | size = (cdb[7] << 8) + cdb[8]; |
2737 | cmd->se_cmd_flags |= SCF_SCSI_CONTROL_SG_IO_CDB; | |
2738 | break; | |
c66ac9db | 2739 | case PERSISTENT_RESERVE_OUT: |
617c0e06 | 2740 | if (su_dev->t10_pr.res_type == SPC3_PERSISTENT_RESERVATIONS) |
e76a35d6 | 2741 | cmd->execute_task = target_scsi3_emulate_pr_out; |
c66ac9db | 2742 | size = (cdb[7] << 8) + cdb[8]; |
05d1c7c0 | 2743 | cmd->se_cmd_flags |= SCF_SCSI_CONTROL_SG_IO_CDB; |
c66ac9db NB |
2744 | break; |
2745 | case GPCMD_MECHANISM_STATUS: | |
2746 | case GPCMD_READ_DVD_STRUCTURE: | |
2747 | size = (cdb[8] << 8) + cdb[9]; | |
2748 | cmd->se_cmd_flags |= SCF_SCSI_CONTROL_SG_IO_CDB; | |
2749 | break; | |
2750 | case READ_POSITION: | |
2751 | size = READ_POSITION_LEN; | |
05d1c7c0 | 2752 | cmd->se_cmd_flags |= SCF_SCSI_CONTROL_SG_IO_CDB; |
c66ac9db | 2753 | break; |
e434f1f1 | 2754 | case MAINTENANCE_OUT: |
e3d6f909 | 2755 | if (dev->transport->get_device_type(dev) != TYPE_ROM) { |
c66ac9db NB |
2756 | /* MAINTENANCE_OUT from SCC-2 |
2757 | * | |
2758 | * Check for emulated MO_SET_TARGET_PGS. | |
2759 | */ | |
e76a35d6 CH |
2760 | if (cdb[1] == MO_SET_TARGET_PGS && |
2761 | su_dev->t10_alua.alua_type == SPC3_ALUA_EMULATED) { | |
2762 | cmd->execute_task = | |
2763 | target_emulate_set_target_port_groups; | |
c66ac9db NB |
2764 | } |
2765 | ||
2766 | size = (cdb[6] << 24) | (cdb[7] << 16) | | |
2767 | (cdb[8] << 8) | cdb[9]; | |
2768 | } else { | |
2769 | /* GPCMD_REPORT_KEY from multi media commands */ | |
2770 | size = (cdb[8] << 8) + cdb[9]; | |
2771 | } | |
05d1c7c0 | 2772 | cmd->se_cmd_flags |= SCF_SCSI_CONTROL_SG_IO_CDB; |
c66ac9db NB |
2773 | break; |
2774 | case INQUIRY: | |
2775 | size = (cdb[3] << 8) + cdb[4]; | |
2776 | /* | |
2777 | * Do implict HEAD_OF_QUEUE processing for INQUIRY. | |
2778 | * See spc4r17 section 5.3 | |
2779 | */ | |
5951146d | 2780 | if (cmd->se_dev->dev_task_attr_type == SAM_TASK_ATTR_EMULATED) |
e66ecd50 | 2781 | cmd->sam_task_attr = MSG_HEAD_TAG; |
05d1c7c0 | 2782 | cmd->se_cmd_flags |= SCF_SCSI_CONTROL_SG_IO_CDB; |
5bda90c8 CH |
2783 | if (!passthrough) |
2784 | cmd->execute_task = target_emulate_inquiry; | |
c66ac9db NB |
2785 | break; |
2786 | case READ_BUFFER: | |
2787 | size = (cdb[6] << 16) + (cdb[7] << 8) + cdb[8]; | |
05d1c7c0 | 2788 | cmd->se_cmd_flags |= SCF_SCSI_CONTROL_SG_IO_CDB; |
c66ac9db NB |
2789 | break; |
2790 | case READ_CAPACITY: | |
2791 | size = READ_CAP_LEN; | |
05d1c7c0 | 2792 | cmd->se_cmd_flags |= SCF_SCSI_CONTROL_SG_IO_CDB; |
5bda90c8 CH |
2793 | if (!passthrough) |
2794 | cmd->execute_task = target_emulate_readcapacity; | |
c66ac9db NB |
2795 | break; |
2796 | case READ_MEDIA_SERIAL_NUMBER: | |
2797 | case SECURITY_PROTOCOL_IN: | |
2798 | case SECURITY_PROTOCOL_OUT: | |
2799 | size = (cdb[6] << 24) | (cdb[7] << 16) | (cdb[8] << 8) | cdb[9]; | |
05d1c7c0 | 2800 | cmd->se_cmd_flags |= SCF_SCSI_CONTROL_SG_IO_CDB; |
c66ac9db NB |
2801 | break; |
2802 | case SERVICE_ACTION_IN: | |
5bda90c8 CH |
2803 | switch (cmd->t_task_cdb[1] & 0x1f) { |
2804 | case SAI_READ_CAPACITY_16: | |
2805 | if (!passthrough) | |
2806 | cmd->execute_task = | |
2807 | target_emulate_readcapacity_16; | |
2808 | break; | |
2809 | default: | |
2810 | if (passthrough) | |
2811 | break; | |
2812 | ||
2813 | pr_err("Unsupported SA: 0x%02x\n", | |
2814 | cmd->t_task_cdb[1] & 0x1f); | |
2815 | goto out_unsupported_cdb; | |
2816 | } | |
2817 | /*FALLTHROUGH*/ | |
c66ac9db NB |
2818 | case ACCESS_CONTROL_IN: |
2819 | case ACCESS_CONTROL_OUT: | |
2820 | case EXTENDED_COPY: | |
2821 | case READ_ATTRIBUTE: | |
2822 | case RECEIVE_COPY_RESULTS: | |
2823 | case WRITE_ATTRIBUTE: | |
2824 | size = (cdb[10] << 24) | (cdb[11] << 16) | | |
2825 | (cdb[12] << 8) | cdb[13]; | |
05d1c7c0 | 2826 | cmd->se_cmd_flags |= SCF_SCSI_CONTROL_SG_IO_CDB; |
c66ac9db NB |
2827 | break; |
2828 | case RECEIVE_DIAGNOSTIC: | |
2829 | case SEND_DIAGNOSTIC: | |
2830 | size = (cdb[3] << 8) | cdb[4]; | |
05d1c7c0 | 2831 | cmd->se_cmd_flags |= SCF_SCSI_CONTROL_SG_IO_CDB; |
c66ac9db NB |
2832 | break; |
2833 | /* #warning FIXME: Figure out correct GPCMD_READ_CD blocksize. */ | |
2834 | #if 0 | |
2835 | case GPCMD_READ_CD: | |
2836 | sectors = (cdb[6] << 16) + (cdb[7] << 8) + cdb[8]; | |
2837 | size = (2336 * sectors); | |
05d1c7c0 | 2838 | cmd->se_cmd_flags |= SCF_SCSI_CONTROL_SG_IO_CDB; |
c66ac9db NB |
2839 | break; |
2840 | #endif | |
2841 | case READ_TOC: | |
2842 | size = cdb[8]; | |
05d1c7c0 | 2843 | cmd->se_cmd_flags |= SCF_SCSI_CONTROL_SG_IO_CDB; |
c66ac9db NB |
2844 | break; |
2845 | case REQUEST_SENSE: | |
2846 | size = cdb[4]; | |
05d1c7c0 | 2847 | cmd->se_cmd_flags |= SCF_SCSI_CONTROL_SG_IO_CDB; |
5bda90c8 CH |
2848 | if (!passthrough) |
2849 | cmd->execute_task = target_emulate_request_sense; | |
c66ac9db NB |
2850 | break; |
2851 | case READ_ELEMENT_STATUS: | |
2852 | size = 65536 * cdb[7] + 256 * cdb[8] + cdb[9]; | |
05d1c7c0 | 2853 | cmd->se_cmd_flags |= SCF_SCSI_CONTROL_SG_IO_CDB; |
c66ac9db NB |
2854 | break; |
2855 | case WRITE_BUFFER: | |
2856 | size = (cdb[6] << 16) + (cdb[7] << 8) + cdb[8]; | |
05d1c7c0 | 2857 | cmd->se_cmd_flags |= SCF_SCSI_CONTROL_SG_IO_CDB; |
c66ac9db NB |
2858 | break; |
2859 | case RESERVE: | |
2860 | case RESERVE_10: | |
2861 | /* | |
2862 | * The SPC-2 RESERVE does not contain a size in the SCSI CDB. | |
2863 | * Assume the passthrough or $FABRIC_MOD will tell us about it. | |
2864 | */ | |
2865 | if (cdb[0] == RESERVE_10) | |
2866 | size = (cdb[7] << 8) | cdb[8]; | |
2867 | else | |
2868 | size = cmd->data_length; | |
2869 | ||
2870 | /* | |
2871 | * Setup the legacy emulated handler for SPC-2 and | |
2872 | * >= SPC-3 compatible reservation handling (CRH=1) | |
2873 | * Otherwise, we assume the underlying SCSI logic is | |
2874 | * is running in SPC_PASSTHROUGH, and wants reservations | |
2875 | * emulation disabled. | |
2876 | */ | |
e76a35d6 CH |
2877 | if (su_dev->t10_pr.res_type != SPC_PASSTHROUGH) |
2878 | cmd->execute_task = target_scsi2_reservation_reserve; | |
c66ac9db NB |
2879 | cmd->se_cmd_flags |= SCF_SCSI_NON_DATA_CDB; |
2880 | break; | |
2881 | case RELEASE: | |
2882 | case RELEASE_10: | |
2883 | /* | |
2884 | * The SPC-2 RELEASE does not contain a size in the SCSI CDB. | |
2885 | * Assume the passthrough or $FABRIC_MOD will tell us about it. | |
2886 | */ | |
2887 | if (cdb[0] == RELEASE_10) | |
2888 | size = (cdb[7] << 8) | cdb[8]; | |
2889 | else | |
2890 | size = cmd->data_length; | |
2891 | ||
e76a35d6 CH |
2892 | if (su_dev->t10_pr.res_type != SPC_PASSTHROUGH) |
2893 | cmd->execute_task = target_scsi2_reservation_release; | |
c66ac9db NB |
2894 | cmd->se_cmd_flags |= SCF_SCSI_NON_DATA_CDB; |
2895 | break; | |
2896 | case SYNCHRONIZE_CACHE: | |
2897 | case 0x91: /* SYNCHRONIZE_CACHE_16: */ | |
2898 | /* | |
2899 | * Extract LBA and range to be flushed for emulated SYNCHRONIZE_CACHE | |
2900 | */ | |
2901 | if (cdb[0] == SYNCHRONIZE_CACHE) { | |
2902 | sectors = transport_get_sectors_10(cdb, cmd, §or_ret); | |
a1d8b49a | 2903 | cmd->t_task_lba = transport_lba_32(cdb); |
c66ac9db NB |
2904 | } else { |
2905 | sectors = transport_get_sectors_16(cdb, cmd, §or_ret); | |
a1d8b49a | 2906 | cmd->t_task_lba = transport_lba_64(cdb); |
c66ac9db NB |
2907 | } |
2908 | if (sector_ret) | |
2909 | goto out_unsupported_cdb; | |
2910 | ||
2911 | size = transport_get_size(sectors, cdb, cmd); | |
2912 | cmd->se_cmd_flags |= SCF_SCSI_NON_DATA_CDB; | |
2913 | ||
5bda90c8 | 2914 | if (passthrough) |
c66ac9db | 2915 | break; |
5bda90c8 | 2916 | |
c66ac9db NB |
2917 | /* |
2918 | * Check to ensure that LBA + Range does not exceed past end of | |
7abbe7f3 | 2919 | * device for IBLOCK and FILEIO ->do_sync_cache() backend calls |
c66ac9db | 2920 | */ |
7abbe7f3 NB |
2921 | if ((cmd->t_task_lba != 0) || (sectors != 0)) { |
2922 | if (transport_cmd_get_valid_sectors(cmd) < 0) | |
2923 | goto out_invalid_cdb_field; | |
2924 | } | |
5bda90c8 | 2925 | cmd->execute_task = target_emulate_synchronize_cache; |
c66ac9db NB |
2926 | break; |
2927 | case UNMAP: | |
2928 | size = get_unaligned_be16(&cdb[7]); | |
05d1c7c0 | 2929 | cmd->se_cmd_flags |= SCF_SCSI_CONTROL_SG_IO_CDB; |
5bda90c8 CH |
2930 | if (!passthrough) |
2931 | cmd->execute_task = target_emulate_unmap; | |
c66ac9db NB |
2932 | break; |
2933 | case WRITE_SAME_16: | |
2934 | sectors = transport_get_sectors_16(cdb, cmd, §or_ret); | |
2935 | if (sector_ret) | |
2936 | goto out_unsupported_cdb; | |
dd3a5ad8 | 2937 | |
6708bb27 | 2938 | if (sectors) |
12850626 | 2939 | size = transport_get_size(1, cdb, cmd); |
6708bb27 AG |
2940 | else { |
2941 | pr_err("WSNZ=1, WRITE_SAME w/sectors=0 not supported\n"); | |
2942 | goto out_invalid_cdb_field; | |
2943 | } | |
dd3a5ad8 | 2944 | |
5db0753b | 2945 | cmd->t_task_lba = get_unaligned_be64(&cdb[2]); |
706d5860 NB |
2946 | cmd->se_cmd_flags |= SCF_SCSI_CONTROL_SG_IO_CDB; |
2947 | ||
2948 | if (target_check_write_same_discard(&cdb[1], dev) < 0) | |
2949 | goto out_invalid_cdb_field; | |
5bda90c8 CH |
2950 | if (!passthrough) |
2951 | cmd->execute_task = target_emulate_write_same; | |
706d5860 NB |
2952 | break; |
2953 | case WRITE_SAME: | |
2954 | sectors = transport_get_sectors_10(cdb, cmd, §or_ret); | |
2955 | if (sector_ret) | |
2956 | goto out_unsupported_cdb; | |
2957 | ||
2958 | if (sectors) | |
12850626 | 2959 | size = transport_get_size(1, cdb, cmd); |
706d5860 NB |
2960 | else { |
2961 | pr_err("WSNZ=1, WRITE_SAME w/sectors=0 not supported\n"); | |
2962 | goto out_invalid_cdb_field; | |
c66ac9db | 2963 | } |
706d5860 NB |
2964 | |
2965 | cmd->t_task_lba = get_unaligned_be32(&cdb[2]); | |
c66ac9db | 2966 | cmd->se_cmd_flags |= SCF_SCSI_CONTROL_SG_IO_CDB; |
706d5860 NB |
2967 | /* |
2968 | * Follow sbcr26 with WRITE_SAME (10) and check for the existence | |
2969 | * of byte 1 bit 3 UNMAP instead of original reserved field | |
2970 | */ | |
2971 | if (target_check_write_same_discard(&cdb[1], dev) < 0) | |
2972 | goto out_invalid_cdb_field; | |
5bda90c8 CH |
2973 | if (!passthrough) |
2974 | cmd->execute_task = target_emulate_write_same; | |
c66ac9db NB |
2975 | break; |
2976 | case ALLOW_MEDIUM_REMOVAL: | |
c66ac9db | 2977 | case ERASE: |
c66ac9db NB |
2978 | case REZERO_UNIT: |
2979 | case SEEK_10: | |
c66ac9db NB |
2980 | case SPACE: |
2981 | case START_STOP: | |
2982 | case TEST_UNIT_READY: | |
2983 | case VERIFY: | |
2984 | case WRITE_FILEMARKS: | |
5bda90c8 CH |
2985 | cmd->se_cmd_flags |= SCF_SCSI_NON_DATA_CDB; |
2986 | if (!passthrough) | |
2987 | cmd->execute_task = target_emulate_noop; | |
2988 | break; | |
2989 | case GPCMD_CLOSE_TRACK: | |
2990 | case INITIALIZE_ELEMENT_STATUS: | |
2991 | case GPCMD_LOAD_UNLOAD: | |
2992 | case GPCMD_SET_SPEED: | |
c66ac9db NB |
2993 | case MOVE_MEDIUM: |
2994 | cmd->se_cmd_flags |= SCF_SCSI_NON_DATA_CDB; | |
2995 | break; | |
2996 | case REPORT_LUNS: | |
e76a35d6 | 2997 | cmd->execute_task = target_report_luns; |
c66ac9db NB |
2998 | size = (cdb[6] << 24) | (cdb[7] << 16) | (cdb[8] << 8) | cdb[9]; |
2999 | /* | |
3000 | * Do implict HEAD_OF_QUEUE processing for REPORT_LUNS | |
3001 | * See spc4r17 section 5.3 | |
3002 | */ | |
5951146d | 3003 | if (cmd->se_dev->dev_task_attr_type == SAM_TASK_ATTR_EMULATED) |
e66ecd50 | 3004 | cmd->sam_task_attr = MSG_HEAD_TAG; |
05d1c7c0 | 3005 | cmd->se_cmd_flags |= SCF_SCSI_CONTROL_SG_IO_CDB; |
c66ac9db NB |
3006 | break; |
3007 | default: | |
6708bb27 | 3008 | pr_warn("TARGET_CORE[%s]: Unsupported SCSI Opcode" |
c66ac9db | 3009 | " 0x%02x, sending CHECK_CONDITION.\n", |
e3d6f909 | 3010 | cmd->se_tfo->get_fabric_name(), cdb[0]); |
c66ac9db NB |
3011 | goto out_unsupported_cdb; |
3012 | } | |
3013 | ||
3014 | if (size != cmd->data_length) { | |
6708bb27 | 3015 | pr_warn("TARGET_CORE[%s]: Expected Transfer Length:" |
c66ac9db | 3016 | " %u does not match SCSI CDB Length: %u for SAM Opcode:" |
e3d6f909 | 3017 | " 0x%02x\n", cmd->se_tfo->get_fabric_name(), |
c66ac9db NB |
3018 | cmd->data_length, size, cdb[0]); |
3019 | ||
3020 | cmd->cmd_spdtl = size; | |
3021 | ||
3022 | if (cmd->data_direction == DMA_TO_DEVICE) { | |
6708bb27 | 3023 | pr_err("Rejecting underflow/overflow" |
c66ac9db NB |
3024 | " WRITE data\n"); |
3025 | goto out_invalid_cdb_field; | |
3026 | } | |
3027 | /* | |
3028 | * Reject READ_* or WRITE_* with overflow/underflow for | |
3029 | * type SCF_SCSI_DATA_SG_IO_CDB. | |
3030 | */ | |
6708bb27 AG |
3031 | if (!ret && (dev->se_sub_dev->se_dev_attrib.block_size != 512)) { |
3032 | pr_err("Failing OVERFLOW/UNDERFLOW for LBA op" | |
c66ac9db | 3033 | " CDB on non 512-byte sector setup subsystem" |
e3d6f909 | 3034 | " plugin: %s\n", dev->transport->name); |
c66ac9db NB |
3035 | /* Returns CHECK_CONDITION + INVALID_CDB_FIELD */ |
3036 | goto out_invalid_cdb_field; | |
3037 | } | |
3038 | ||
3039 | if (size > cmd->data_length) { | |
3040 | cmd->se_cmd_flags |= SCF_OVERFLOW_BIT; | |
3041 | cmd->residual_count = (size - cmd->data_length); | |
3042 | } else { | |
3043 | cmd->se_cmd_flags |= SCF_UNDERFLOW_BIT; | |
3044 | cmd->residual_count = (cmd->data_length - size); | |
3045 | } | |
3046 | cmd->data_length = size; | |
3047 | } | |
3048 | ||
5bda90c8 CH |
3049 | /* reject any command that we don't have a handler for */ |
3050 | if (!(passthrough || cmd->execute_task || | |
3051 | (cmd->se_cmd_flags & SCF_SCSI_DATA_SG_IO_CDB))) | |
3052 | goto out_unsupported_cdb; | |
3053 | ||
d0229ae3 AG |
3054 | /* Let's limit control cdbs to a page, for simplicity's sake. */ |
3055 | if ((cmd->se_cmd_flags & SCF_SCSI_CONTROL_SG_IO_CDB) && | |
3056 | size > PAGE_SIZE) | |
3057 | goto out_invalid_cdb_field; | |
3058 | ||
c66ac9db NB |
3059 | transport_set_supported_SAM_opcode(cmd); |
3060 | return ret; | |
3061 | ||
3062 | out_unsupported_cdb: | |
3063 | cmd->se_cmd_flags |= SCF_SCSI_CDB_EXCEPTION; | |
3064 | cmd->scsi_sense_reason = TCM_UNSUPPORTED_SCSI_OPCODE; | |
5951146d | 3065 | return -EINVAL; |
c66ac9db NB |
3066 | out_invalid_cdb_field: |
3067 | cmd->se_cmd_flags |= SCF_SCSI_CDB_EXCEPTION; | |
3068 | cmd->scsi_sense_reason = TCM_INVALID_CDB_FIELD; | |
5951146d | 3069 | return -EINVAL; |
c66ac9db NB |
3070 | } |
3071 | ||
c66ac9db | 3072 | /* |
35e0e757 | 3073 | * Called from I/O completion to determine which dormant/delayed |
c66ac9db NB |
3074 | * and ordered cmds need to have their tasks added to the execution queue. |
3075 | */ | |
3076 | static void transport_complete_task_attr(struct se_cmd *cmd) | |
3077 | { | |
5951146d | 3078 | struct se_device *dev = cmd->se_dev; |
c66ac9db NB |
3079 | struct se_cmd *cmd_p, *cmd_tmp; |
3080 | int new_active_tasks = 0; | |
3081 | ||
e66ecd50 | 3082 | if (cmd->sam_task_attr == MSG_SIMPLE_TAG) { |
c66ac9db NB |
3083 | atomic_dec(&dev->simple_cmds); |
3084 | smp_mb__after_atomic_dec(); | |
3085 | dev->dev_cur_ordered_id++; | |
6708bb27 | 3086 | pr_debug("Incremented dev->dev_cur_ordered_id: %u for" |
c66ac9db NB |
3087 | " SIMPLE: %u\n", dev->dev_cur_ordered_id, |
3088 | cmd->se_ordered_id); | |
e66ecd50 | 3089 | } else if (cmd->sam_task_attr == MSG_HEAD_TAG) { |
c66ac9db | 3090 | dev->dev_cur_ordered_id++; |
6708bb27 | 3091 | pr_debug("Incremented dev_cur_ordered_id: %u for" |
c66ac9db NB |
3092 | " HEAD_OF_QUEUE: %u\n", dev->dev_cur_ordered_id, |
3093 | cmd->se_ordered_id); | |
e66ecd50 | 3094 | } else if (cmd->sam_task_attr == MSG_ORDERED_TAG) { |
c66ac9db NB |
3095 | atomic_dec(&dev->dev_ordered_sync); |
3096 | smp_mb__after_atomic_dec(); | |
c66ac9db NB |
3097 | |
3098 | dev->dev_cur_ordered_id++; | |
6708bb27 | 3099 | pr_debug("Incremented dev_cur_ordered_id: %u for ORDERED:" |
c66ac9db NB |
3100 | " %u\n", dev->dev_cur_ordered_id, cmd->se_ordered_id); |
3101 | } | |
3102 | /* | |
3103 | * Process all commands up to the last received | |
3104 | * ORDERED task attribute which requires another blocking | |
3105 | * boundary | |
3106 | */ | |
3107 | spin_lock(&dev->delayed_cmd_lock); | |
3108 | list_for_each_entry_safe(cmd_p, cmd_tmp, | |
5951146d | 3109 | &dev->delayed_cmd_list, se_delayed_node) { |
c66ac9db | 3110 | |
5951146d | 3111 | list_del(&cmd_p->se_delayed_node); |
c66ac9db NB |
3112 | spin_unlock(&dev->delayed_cmd_lock); |
3113 | ||
6708bb27 | 3114 | pr_debug("Calling add_tasks() for" |
c66ac9db NB |
3115 | " cmd_p: 0x%02x Task Attr: 0x%02x" |
3116 | " Dormant -> Active, se_ordered_id: %u\n", | |
6708bb27 | 3117 | cmd_p->t_task_cdb[0], |
c66ac9db NB |
3118 | cmd_p->sam_task_attr, cmd_p->se_ordered_id); |
3119 | ||
3120 | transport_add_tasks_from_cmd(cmd_p); | |
3121 | new_active_tasks++; | |
3122 | ||
3123 | spin_lock(&dev->delayed_cmd_lock); | |
e66ecd50 | 3124 | if (cmd_p->sam_task_attr == MSG_ORDERED_TAG) |
c66ac9db NB |
3125 | break; |
3126 | } | |
3127 | spin_unlock(&dev->delayed_cmd_lock); | |
3128 | /* | |
3129 | * If new tasks have become active, wake up the transport thread | |
3130 | * to do the processing of the Active tasks. | |
3131 | */ | |
3132 | if (new_active_tasks != 0) | |
e3d6f909 | 3133 | wake_up_interruptible(&dev->dev_queue_obj.thread_wq); |
c66ac9db NB |
3134 | } |
3135 | ||
e057f533 | 3136 | static void transport_complete_qf(struct se_cmd *cmd) |
07bde79a NB |
3137 | { |
3138 | int ret = 0; | |
3139 | ||
e057f533 CH |
3140 | if (cmd->se_dev->dev_task_attr_type == SAM_TASK_ATTR_EMULATED) |
3141 | transport_complete_task_attr(cmd); | |
3142 | ||
3143 | if (cmd->se_cmd_flags & SCF_TRANSPORT_TASK_SENSE) { | |
3144 | ret = cmd->se_tfo->queue_status(cmd); | |
3145 | if (ret) | |
3146 | goto out; | |
3147 | } | |
07bde79a NB |
3148 | |
3149 | switch (cmd->data_direction) { | |
3150 | case DMA_FROM_DEVICE: | |
3151 | ret = cmd->se_tfo->queue_data_in(cmd); | |
3152 | break; | |
3153 | case DMA_TO_DEVICE: | |
ec98f782 | 3154 | if (cmd->t_bidi_data_sg) { |
07bde79a NB |
3155 | ret = cmd->se_tfo->queue_data_in(cmd); |
3156 | if (ret < 0) | |
e057f533 | 3157 | break; |
07bde79a NB |
3158 | } |
3159 | /* Fall through for DMA_TO_DEVICE */ | |
3160 | case DMA_NONE: | |
3161 | ret = cmd->se_tfo->queue_status(cmd); | |
3162 | break; | |
3163 | default: | |
3164 | break; | |
3165 | } | |
3166 | ||
e057f533 CH |
3167 | out: |
3168 | if (ret < 0) { | |
3169 | transport_handle_queue_full(cmd, cmd->se_dev); | |
3170 | return; | |
3171 | } | |
3172 | transport_lun_remove_cmd(cmd); | |
3173 | transport_cmd_check_stop_to_fabric(cmd); | |
07bde79a NB |
3174 | } |
3175 | ||
3176 | static void transport_handle_queue_full( | |
3177 | struct se_cmd *cmd, | |
e057f533 | 3178 | struct se_device *dev) |
07bde79a NB |
3179 | { |
3180 | spin_lock_irq(&dev->qf_cmd_lock); | |
07bde79a NB |
3181 | list_add_tail(&cmd->se_qf_node, &cmd->se_dev->qf_cmd_list); |
3182 | atomic_inc(&dev->dev_qf_count); | |
3183 | smp_mb__after_atomic_inc(); | |
3184 | spin_unlock_irq(&cmd->se_dev->qf_cmd_lock); | |
3185 | ||
3186 | schedule_work(&cmd->se_dev->qf_work_queue); | |
3187 | } | |
3188 | ||
35e0e757 | 3189 | static void target_complete_ok_work(struct work_struct *work) |
c66ac9db | 3190 | { |
35e0e757 | 3191 | struct se_cmd *cmd = container_of(work, struct se_cmd, work); |
07bde79a | 3192 | int reason = 0, ret; |
35e0e757 | 3193 | |
c66ac9db NB |
3194 | /* |
3195 | * Check if we need to move delayed/dormant tasks from cmds on the | |
3196 | * delayed execution list after a HEAD_OF_QUEUE or ORDERED Task | |
3197 | * Attribute. | |
3198 | */ | |
5951146d | 3199 | if (cmd->se_dev->dev_task_attr_type == SAM_TASK_ATTR_EMULATED) |
c66ac9db | 3200 | transport_complete_task_attr(cmd); |
07bde79a NB |
3201 | /* |
3202 | * Check to schedule QUEUE_FULL work, or execute an existing | |
3203 | * cmd->transport_qf_callback() | |
3204 | */ | |
3205 | if (atomic_read(&cmd->se_dev->dev_qf_count) != 0) | |
3206 | schedule_work(&cmd->se_dev->qf_work_queue); | |
3207 | ||
c66ac9db NB |
3208 | /* |
3209 | * Check if we need to retrieve a sense buffer from | |
3210 | * the struct se_cmd in question. | |
3211 | */ | |
3212 | if (cmd->se_cmd_flags & SCF_TRANSPORT_TASK_SENSE) { | |
3213 | if (transport_get_sense_data(cmd) < 0) | |
3214 | reason = TCM_NON_EXISTENT_LUN; | |
3215 | ||
3216 | /* | |
3217 | * Only set when an struct se_task->task_scsi_status returned | |
3218 | * a non GOOD status. | |
3219 | */ | |
3220 | if (cmd->scsi_status) { | |
07bde79a | 3221 | ret = transport_send_check_condition_and_sense( |
c66ac9db | 3222 | cmd, reason, 1); |
f147abb4 | 3223 | if (ret == -EAGAIN || ret == -ENOMEM) |
07bde79a NB |
3224 | goto queue_full; |
3225 | ||
c66ac9db NB |
3226 | transport_lun_remove_cmd(cmd); |
3227 | transport_cmd_check_stop_to_fabric(cmd); | |
3228 | return; | |
3229 | } | |
3230 | } | |
3231 | /* | |
25985edc | 3232 | * Check for a callback, used by amongst other things |
c66ac9db NB |
3233 | * XDWRITE_READ_10 emulation. |
3234 | */ | |
3235 | if (cmd->transport_complete_callback) | |
3236 | cmd->transport_complete_callback(cmd); | |
3237 | ||
3238 | switch (cmd->data_direction) { | |
3239 | case DMA_FROM_DEVICE: | |
3240 | spin_lock(&cmd->se_lun->lun_sep_lock); | |
e3d6f909 AG |
3241 | if (cmd->se_lun->lun_sep) { |
3242 | cmd->se_lun->lun_sep->sep_stats.tx_data_octets += | |
c66ac9db NB |
3243 | cmd->data_length; |
3244 | } | |
3245 | spin_unlock(&cmd->se_lun->lun_sep_lock); | |
c66ac9db | 3246 | |
07bde79a | 3247 | ret = cmd->se_tfo->queue_data_in(cmd); |
f147abb4 | 3248 | if (ret == -EAGAIN || ret == -ENOMEM) |
07bde79a | 3249 | goto queue_full; |
c66ac9db NB |
3250 | break; |
3251 | case DMA_TO_DEVICE: | |
3252 | spin_lock(&cmd->se_lun->lun_sep_lock); | |
e3d6f909 AG |
3253 | if (cmd->se_lun->lun_sep) { |
3254 | cmd->se_lun->lun_sep->sep_stats.rx_data_octets += | |
c66ac9db NB |
3255 | cmd->data_length; |
3256 | } | |
3257 | spin_unlock(&cmd->se_lun->lun_sep_lock); | |
3258 | /* | |
3259 | * Check if we need to send READ payload for BIDI-COMMAND | |
3260 | */ | |
ec98f782 | 3261 | if (cmd->t_bidi_data_sg) { |
c66ac9db | 3262 | spin_lock(&cmd->se_lun->lun_sep_lock); |
e3d6f909 AG |
3263 | if (cmd->se_lun->lun_sep) { |
3264 | cmd->se_lun->lun_sep->sep_stats.tx_data_octets += | |
c66ac9db NB |
3265 | cmd->data_length; |
3266 | } | |
3267 | spin_unlock(&cmd->se_lun->lun_sep_lock); | |
07bde79a | 3268 | ret = cmd->se_tfo->queue_data_in(cmd); |
f147abb4 | 3269 | if (ret == -EAGAIN || ret == -ENOMEM) |
07bde79a | 3270 | goto queue_full; |
c66ac9db NB |
3271 | break; |
3272 | } | |
3273 | /* Fall through for DMA_TO_DEVICE */ | |
3274 | case DMA_NONE: | |
07bde79a | 3275 | ret = cmd->se_tfo->queue_status(cmd); |
f147abb4 | 3276 | if (ret == -EAGAIN || ret == -ENOMEM) |
07bde79a | 3277 | goto queue_full; |
c66ac9db NB |
3278 | break; |
3279 | default: | |
3280 | break; | |
3281 | } | |
3282 | ||
3283 | transport_lun_remove_cmd(cmd); | |
3284 | transport_cmd_check_stop_to_fabric(cmd); | |
07bde79a NB |
3285 | return; |
3286 | ||
3287 | queue_full: | |
6708bb27 | 3288 | pr_debug("Handling complete_ok QUEUE_FULL: se_cmd: %p," |
07bde79a | 3289 | " data_direction: %d\n", cmd, cmd->data_direction); |
e057f533 CH |
3290 | cmd->t_state = TRANSPORT_COMPLETE_QF_OK; |
3291 | transport_handle_queue_full(cmd, cmd->se_dev); | |
c66ac9db NB |
3292 | } |
3293 | ||
3294 | static void transport_free_dev_tasks(struct se_cmd *cmd) | |
3295 | { | |
3296 | struct se_task *task, *task_tmp; | |
3297 | unsigned long flags; | |
0c2cfe5f | 3298 | LIST_HEAD(dispose_list); |
c66ac9db | 3299 | |
a1d8b49a | 3300 | spin_lock_irqsave(&cmd->t_state_lock, flags); |
c66ac9db | 3301 | list_for_each_entry_safe(task, task_tmp, |
a1d8b49a | 3302 | &cmd->t_task_list, t_list) { |
0c2cfe5f CH |
3303 | if (!(task->task_flags & TF_ACTIVE)) |
3304 | list_move_tail(&task->t_list, &dispose_list); | |
3305 | } | |
3306 | spin_unlock_irqrestore(&cmd->t_state_lock, flags); | |
3307 | ||
3308 | while (!list_empty(&dispose_list)) { | |
3309 | task = list_first_entry(&dispose_list, struct se_task, t_list); | |
c66ac9db | 3310 | |
af3f00c7 CH |
3311 | if (task->task_sg != cmd->t_data_sg && |
3312 | task->task_sg != cmd->t_bidi_data_sg) | |
3313 | kfree(task->task_sg); | |
c66ac9db NB |
3314 | |
3315 | list_del(&task->t_list); | |
3316 | ||
42bf829e | 3317 | cmd->se_dev->transport->free_task(task); |
c66ac9db | 3318 | } |
c66ac9db NB |
3319 | } |
3320 | ||
6708bb27 | 3321 | static inline void transport_free_sgl(struct scatterlist *sgl, int nents) |
c66ac9db | 3322 | { |
ec98f782 | 3323 | struct scatterlist *sg; |
ec98f782 | 3324 | int count; |
c66ac9db | 3325 | |
6708bb27 AG |
3326 | for_each_sg(sgl, sg, nents, count) |
3327 | __free_page(sg_page(sg)); | |
c66ac9db | 3328 | |
6708bb27 AG |
3329 | kfree(sgl); |
3330 | } | |
c66ac9db | 3331 | |
6708bb27 AG |
3332 | static inline void transport_free_pages(struct se_cmd *cmd) |
3333 | { | |
3334 | if (cmd->se_cmd_flags & SCF_PASSTHROUGH_SG_TO_MEM_NOALLOC) | |
3335 | return; | |
3336 | ||
3337 | transport_free_sgl(cmd->t_data_sg, cmd->t_data_nents); | |
ec98f782 AG |
3338 | cmd->t_data_sg = NULL; |
3339 | cmd->t_data_nents = 0; | |
c66ac9db | 3340 | |
6708bb27 | 3341 | transport_free_sgl(cmd->t_bidi_data_sg, cmd->t_bidi_data_nents); |
ec98f782 AG |
3342 | cmd->t_bidi_data_sg = NULL; |
3343 | cmd->t_bidi_data_nents = 0; | |
c66ac9db NB |
3344 | } |
3345 | ||
e26d99ae CH |
3346 | /** |
3347 | * transport_release_cmd - free a command | |
3348 | * @cmd: command to free | |
3349 | * | |
3350 | * This routine unconditionally frees a command, and reference counting | |
3351 | * or list removal must be done in the caller. | |
3352 | */ | |
3353 | static void transport_release_cmd(struct se_cmd *cmd) | |
3354 | { | |
3355 | BUG_ON(!cmd->se_tfo); | |
3356 | ||
3357 | if (cmd->se_tmr_req) | |
3358 | core_tmr_release_req(cmd->se_tmr_req); | |
3359 | if (cmd->t_task_cdb != cmd->__t_task_cdb) | |
3360 | kfree(cmd->t_task_cdb); | |
3361 | /* | |
3362 | * Check if target_wait_for_sess_cmds() is expecting to | |
3363 | * release se_cmd directly here.. | |
3364 | */ | |
3365 | if (cmd->check_release != 0 && cmd->se_tfo->check_release_cmd) | |
3366 | if (cmd->se_tfo->check_release_cmd(cmd) != 0) | |
3367 | return; | |
3368 | ||
3369 | cmd->se_tfo->release_cmd(cmd); | |
3370 | } | |
3371 | ||
d3df7825 CH |
3372 | /** |
3373 | * transport_put_cmd - release a reference to a command | |
3374 | * @cmd: command to release | |
3375 | * | |
3376 | * This routine releases our reference to the command and frees it if possible. | |
3377 | */ | |
39c05f32 | 3378 | static void transport_put_cmd(struct se_cmd *cmd) |
c66ac9db NB |
3379 | { |
3380 | unsigned long flags; | |
4911e3cc | 3381 | int free_tasks = 0; |
c66ac9db | 3382 | |
a1d8b49a | 3383 | spin_lock_irqsave(&cmd->t_state_lock, flags); |
4911e3cc CH |
3384 | if (atomic_read(&cmd->t_fe_count)) { |
3385 | if (!atomic_dec_and_test(&cmd->t_fe_count)) | |
3386 | goto out_busy; | |
3387 | } | |
3388 | ||
3389 | if (atomic_read(&cmd->t_se_count)) { | |
3390 | if (!atomic_dec_and_test(&cmd->t_se_count)) | |
3391 | goto out_busy; | |
3392 | } | |
3393 | ||
3394 | if (atomic_read(&cmd->transport_dev_active)) { | |
3395 | atomic_set(&cmd->transport_dev_active, 0); | |
3396 | transport_all_task_dev_remove_state(cmd); | |
3397 | free_tasks = 1; | |
c66ac9db | 3398 | } |
a1d8b49a | 3399 | spin_unlock_irqrestore(&cmd->t_state_lock, flags); |
c66ac9db | 3400 | |
4911e3cc CH |
3401 | if (free_tasks != 0) |
3402 | transport_free_dev_tasks(cmd); | |
d3df7825 | 3403 | |
c66ac9db | 3404 | transport_free_pages(cmd); |
31afc39c | 3405 | transport_release_cmd(cmd); |
39c05f32 | 3406 | return; |
4911e3cc CH |
3407 | out_busy: |
3408 | spin_unlock_irqrestore(&cmd->t_state_lock, flags); | |
c66ac9db NB |
3409 | } |
3410 | ||
c66ac9db | 3411 | /* |
ec98f782 AG |
3412 | * transport_generic_map_mem_to_cmd - Use fabric-alloced pages instead of |
3413 | * allocating in the core. | |
c66ac9db NB |
3414 | * @cmd: Associated se_cmd descriptor |
3415 | * @mem: SGL style memory for TCM WRITE / READ | |
3416 | * @sg_mem_num: Number of SGL elements | |
3417 | * @mem_bidi_in: SGL style memory for TCM BIDI READ | |
3418 | * @sg_mem_bidi_num: Number of BIDI READ SGL elements | |
3419 | * | |
3420 | * Return: nonzero return cmd was rejected for -ENOMEM or inproper usage | |
3421 | * of parameters. | |
3422 | */ | |
3423 | int transport_generic_map_mem_to_cmd( | |
3424 | struct se_cmd *cmd, | |
5951146d AG |
3425 | struct scatterlist *sgl, |
3426 | u32 sgl_count, | |
3427 | struct scatterlist *sgl_bidi, | |
3428 | u32 sgl_bidi_count) | |
c66ac9db | 3429 | { |
5951146d | 3430 | if (!sgl || !sgl_count) |
c66ac9db | 3431 | return 0; |
c66ac9db | 3432 | |
c66ac9db NB |
3433 | if ((cmd->se_cmd_flags & SCF_SCSI_DATA_SG_IO_CDB) || |
3434 | (cmd->se_cmd_flags & SCF_SCSI_CONTROL_SG_IO_CDB)) { | |
fef58a60 NB |
3435 | /* |
3436 | * Reject SCSI data overflow with map_mem_to_cmd() as incoming | |
3437 | * scatterlists already have been set to follow what the fabric | |
3438 | * passes for the original expected data transfer length. | |
3439 | */ | |
3440 | if (cmd->se_cmd_flags & SCF_OVERFLOW_BIT) { | |
3441 | pr_warn("Rejecting SCSI DATA overflow for fabric using" | |
3442 | " SCF_PASSTHROUGH_SG_TO_MEM_NOALLOC\n"); | |
3443 | cmd->se_cmd_flags |= SCF_SCSI_CDB_EXCEPTION; | |
3444 | cmd->scsi_sense_reason = TCM_INVALID_CDB_FIELD; | |
3445 | return -EINVAL; | |
3446 | } | |
c66ac9db | 3447 | |
ec98f782 AG |
3448 | cmd->t_data_sg = sgl; |
3449 | cmd->t_data_nents = sgl_count; | |
c66ac9db | 3450 | |
ec98f782 AG |
3451 | if (sgl_bidi && sgl_bidi_count) { |
3452 | cmd->t_bidi_data_sg = sgl_bidi; | |
3453 | cmd->t_bidi_data_nents = sgl_bidi_count; | |
c66ac9db NB |
3454 | } |
3455 | cmd->se_cmd_flags |= SCF_PASSTHROUGH_SG_TO_MEM_NOALLOC; | |
c66ac9db NB |
3456 | } |
3457 | ||
3458 | return 0; | |
3459 | } | |
3460 | EXPORT_SYMBOL(transport_generic_map_mem_to_cmd); | |
3461 | ||
05d1c7c0 AG |
3462 | void *transport_kmap_first_data_page(struct se_cmd *cmd) |
3463 | { | |
ec98f782 | 3464 | struct scatterlist *sg = cmd->t_data_sg; |
05d1c7c0 | 3465 | |
ec98f782 | 3466 | BUG_ON(!sg); |
05d1c7c0 | 3467 | /* |
ec98f782 AG |
3468 | * We need to take into account a possible offset here for fabrics like |
3469 | * tcm_loop who may be using a contig buffer from the SCSI midlayer for | |
3470 | * control CDBs passed as SGLs via transport_generic_map_mem_to_cmd() | |
05d1c7c0 | 3471 | */ |
ec98f782 | 3472 | return kmap(sg_page(sg)) + sg->offset; |
05d1c7c0 AG |
3473 | } |
3474 | EXPORT_SYMBOL(transport_kmap_first_data_page); | |
3475 | ||
3476 | void transport_kunmap_first_data_page(struct se_cmd *cmd) | |
3477 | { | |
ec98f782 | 3478 | kunmap(sg_page(cmd->t_data_sg)); |
05d1c7c0 AG |
3479 | } |
3480 | EXPORT_SYMBOL(transport_kunmap_first_data_page); | |
3481 | ||
c66ac9db | 3482 | static int |
05d1c7c0 | 3483 | transport_generic_get_mem(struct se_cmd *cmd) |
c66ac9db | 3484 | { |
ec98f782 AG |
3485 | u32 length = cmd->data_length; |
3486 | unsigned int nents; | |
3487 | struct page *page; | |
3488 | int i = 0; | |
c66ac9db | 3489 | |
ec98f782 AG |
3490 | nents = DIV_ROUND_UP(length, PAGE_SIZE); |
3491 | cmd->t_data_sg = kmalloc(sizeof(struct scatterlist) * nents, GFP_KERNEL); | |
3492 | if (!cmd->t_data_sg) | |
3493 | return -ENOMEM; | |
c66ac9db | 3494 | |
ec98f782 AG |
3495 | cmd->t_data_nents = nents; |
3496 | sg_init_table(cmd->t_data_sg, nents); | |
c66ac9db | 3497 | |
ec98f782 AG |
3498 | while (length) { |
3499 | u32 page_len = min_t(u32, length, PAGE_SIZE); | |
3500 | page = alloc_page(GFP_KERNEL | __GFP_ZERO); | |
3501 | if (!page) | |
3502 | goto out; | |
c66ac9db | 3503 | |
ec98f782 AG |
3504 | sg_set_page(&cmd->t_data_sg[i], page, page_len, 0); |
3505 | length -= page_len; | |
3506 | i++; | |
c66ac9db | 3507 | } |
c66ac9db | 3508 | return 0; |
c66ac9db | 3509 | |
ec98f782 AG |
3510 | out: |
3511 | while (i >= 0) { | |
3512 | __free_page(sg_page(&cmd->t_data_sg[i])); | |
3513 | i--; | |
c66ac9db | 3514 | } |
ec98f782 AG |
3515 | kfree(cmd->t_data_sg); |
3516 | cmd->t_data_sg = NULL; | |
3517 | return -ENOMEM; | |
c66ac9db NB |
3518 | } |
3519 | ||
a1d8b49a AG |
3520 | /* Reduce sectors if they are too long for the device */ |
3521 | static inline sector_t transport_limit_task_sectors( | |
c66ac9db NB |
3522 | struct se_device *dev, |
3523 | unsigned long long lba, | |
a1d8b49a | 3524 | sector_t sectors) |
c66ac9db | 3525 | { |
a1d8b49a | 3526 | sectors = min_t(sector_t, sectors, dev->se_sub_dev->se_dev_attrib.max_sectors); |
c66ac9db | 3527 | |
a1d8b49a AG |
3528 | if (dev->transport->get_device_type(dev) == TYPE_DISK) |
3529 | if ((lba + sectors) > transport_dev_end_lba(dev)) | |
3530 | sectors = ((transport_dev_end_lba(dev) - lba) + 1); | |
c66ac9db | 3531 | |
a1d8b49a | 3532 | return sectors; |
c66ac9db NB |
3533 | } |
3534 | ||
c66ac9db NB |
3535 | |
3536 | /* | |
3537 | * This function can be used by HW target mode drivers to create a linked | |
3538 | * scatterlist from all contiguously allocated struct se_task->task_sg[]. | |
3539 | * This is intended to be called during the completion path by TCM Core | |
3540 | * when struct target_core_fabric_ops->check_task_sg_chaining is enabled. | |
3541 | */ | |
3542 | void transport_do_task_sg_chain(struct se_cmd *cmd) | |
3543 | { | |
ec98f782 AG |
3544 | struct scatterlist *sg_first = NULL; |
3545 | struct scatterlist *sg_prev = NULL; | |
3546 | int sg_prev_nents = 0; | |
3547 | struct scatterlist *sg; | |
c66ac9db | 3548 | struct se_task *task; |
ec98f782 | 3549 | u32 chained_nents = 0; |
c66ac9db NB |
3550 | int i; |
3551 | ||
ec98f782 AG |
3552 | BUG_ON(!cmd->se_tfo->task_sg_chaining); |
3553 | ||
c66ac9db NB |
3554 | /* |
3555 | * Walk the struct se_task list and setup scatterlist chains | |
a1d8b49a | 3556 | * for each contiguously allocated struct se_task->task_sg[]. |
c66ac9db | 3557 | */ |
a1d8b49a | 3558 | list_for_each_entry(task, &cmd->t_task_list, t_list) { |
ec98f782 | 3559 | if (!task->task_sg) |
c66ac9db NB |
3560 | continue; |
3561 | ||
ec98f782 AG |
3562 | if (!sg_first) { |
3563 | sg_first = task->task_sg; | |
6708bb27 | 3564 | chained_nents = task->task_sg_nents; |
97868c89 | 3565 | } else { |
ec98f782 | 3566 | sg_chain(sg_prev, sg_prev_nents, task->task_sg); |
6708bb27 | 3567 | chained_nents += task->task_sg_nents; |
97868c89 | 3568 | } |
c3c74c7a NB |
3569 | /* |
3570 | * For the padded tasks, use the extra SGL vector allocated | |
3571 | * in transport_allocate_data_tasks() for the sg_prev_nents | |
04629b7b CH |
3572 | * offset into sg_chain() above. |
3573 | * | |
3574 | * We do not need the padding for the last task (or a single | |
3575 | * task), but in that case we will never use the sg_prev_nents | |
3576 | * value below which would be incorrect. | |
c3c74c7a | 3577 | */ |
04629b7b | 3578 | sg_prev_nents = (task->task_sg_nents + 1); |
ec98f782 | 3579 | sg_prev = task->task_sg; |
c66ac9db NB |
3580 | } |
3581 | /* | |
3582 | * Setup the starting pointer and total t_tasks_sg_linked_no including | |
3583 | * padding SGs for linking and to mark the end. | |
3584 | */ | |
a1d8b49a | 3585 | cmd->t_tasks_sg_chained = sg_first; |
ec98f782 | 3586 | cmd->t_tasks_sg_chained_no = chained_nents; |
c66ac9db | 3587 | |
6708bb27 | 3588 | pr_debug("Setup cmd: %p cmd->t_tasks_sg_chained: %p and" |
a1d8b49a AG |
3589 | " t_tasks_sg_chained_no: %u\n", cmd, cmd->t_tasks_sg_chained, |
3590 | cmd->t_tasks_sg_chained_no); | |
c66ac9db | 3591 | |
a1d8b49a AG |
3592 | for_each_sg(cmd->t_tasks_sg_chained, sg, |
3593 | cmd->t_tasks_sg_chained_no, i) { | |
c66ac9db | 3594 | |
6708bb27 | 3595 | pr_debug("SG[%d]: %p page: %p length: %d offset: %d\n", |
5951146d | 3596 | i, sg, sg_page(sg), sg->length, sg->offset); |
c66ac9db | 3597 | if (sg_is_chain(sg)) |
6708bb27 | 3598 | pr_debug("SG: %p sg_is_chain=1\n", sg); |
c66ac9db | 3599 | if (sg_is_last(sg)) |
6708bb27 | 3600 | pr_debug("SG: %p sg_is_last=1\n", sg); |
c66ac9db | 3601 | } |
c66ac9db NB |
3602 | } |
3603 | EXPORT_SYMBOL(transport_do_task_sg_chain); | |
3604 | ||
a1d8b49a AG |
3605 | /* |
3606 | * Break up cmd into chunks transport can handle | |
3607 | */ | |
38b40067 CH |
3608 | static int |
3609 | transport_allocate_data_tasks(struct se_cmd *cmd, | |
c66ac9db | 3610 | enum dma_data_direction data_direction, |
38b40067 | 3611 | struct scatterlist *cmd_sg, unsigned int sgl_nents) |
c66ac9db | 3612 | { |
5951146d | 3613 | struct se_device *dev = cmd->se_dev; |
a3eedc22 | 3614 | int task_count, i; |
38b40067 CH |
3615 | unsigned long long lba; |
3616 | sector_t sectors, dev_max_sectors; | |
3617 | u32 sector_size; | |
3618 | ||
3619 | if (transport_cmd_get_valid_sectors(cmd) < 0) | |
3620 | return -EINVAL; | |
3621 | ||
3622 | dev_max_sectors = dev->se_sub_dev->se_dev_attrib.max_sectors; | |
3623 | sector_size = dev->se_sub_dev->se_dev_attrib.block_size; | |
a1d8b49a | 3624 | |
ec98f782 | 3625 | WARN_ON(cmd->data_length % sector_size); |
38b40067 CH |
3626 | |
3627 | lba = cmd->t_task_lba; | |
ec98f782 | 3628 | sectors = DIV_ROUND_UP(cmd->data_length, sector_size); |
277c5f27 | 3629 | task_count = DIV_ROUND_UP_SECTOR_T(sectors, dev_max_sectors); |
af3f00c7 CH |
3630 | |
3631 | /* | |
3632 | * If we need just a single task reuse the SG list in the command | |
3633 | * and avoid a lot of work. | |
3634 | */ | |
3635 | if (task_count == 1) { | |
3636 | struct se_task *task; | |
3637 | unsigned long flags; | |
3638 | ||
3639 | task = transport_generic_get_task(cmd, data_direction); | |
3640 | if (!task) | |
3641 | return -ENOMEM; | |
3642 | ||
3643 | task->task_sg = cmd_sg; | |
3644 | task->task_sg_nents = sgl_nents; | |
3645 | ||
3646 | task->task_lba = lba; | |
3647 | task->task_sectors = sectors; | |
3648 | task->task_size = task->task_sectors * sector_size; | |
3649 | ||
3650 | spin_lock_irqsave(&cmd->t_state_lock, flags); | |
3651 | list_add_tail(&task->t_list, &cmd->t_task_list); | |
3652 | spin_unlock_irqrestore(&cmd->t_state_lock, flags); | |
3653 | ||
3654 | return task_count; | |
3655 | } | |
3656 | ||
ec98f782 | 3657 | for (i = 0; i < task_count; i++) { |
38b40067 | 3658 | struct se_task *task; |
c3c74c7a | 3659 | unsigned int task_size, task_sg_nents_padded; |
38b40067 CH |
3660 | struct scatterlist *sg; |
3661 | unsigned long flags; | |
ec98f782 | 3662 | int count; |
a1d8b49a | 3663 | |
c66ac9db | 3664 | task = transport_generic_get_task(cmd, data_direction); |
a1d8b49a | 3665 | if (!task) |
ec98f782 | 3666 | return -ENOMEM; |
c66ac9db | 3667 | |
c66ac9db | 3668 | task->task_lba = lba; |
ec98f782 AG |
3669 | task->task_sectors = min(sectors, dev_max_sectors); |
3670 | task->task_size = task->task_sectors * sector_size; | |
c66ac9db | 3671 | |
525a48a2 NB |
3672 | /* |
3673 | * This now assumes that passed sg_ents are in PAGE_SIZE chunks | |
3674 | * in order to calculate the number per task SGL entries | |
3675 | */ | |
3676 | task->task_sg_nents = DIV_ROUND_UP(task->task_size, PAGE_SIZE); | |
c66ac9db | 3677 | /* |
ec98f782 AG |
3678 | * Check if the fabric module driver is requesting that all |
3679 | * struct se_task->task_sg[] be chained together.. If so, | |
3680 | * then allocate an extra padding SG entry for linking and | |
c3c74c7a NB |
3681 | * marking the end of the chained SGL for every task except |
3682 | * the last one for (task_count > 1) operation, or skipping | |
3683 | * the extra padding for the (task_count == 1) case. | |
c66ac9db | 3684 | */ |
c3c74c7a NB |
3685 | if (cmd->se_tfo->task_sg_chaining && (i < (task_count - 1))) { |
3686 | task_sg_nents_padded = (task->task_sg_nents + 1); | |
c3c74c7a NB |
3687 | } else |
3688 | task_sg_nents_padded = task->task_sg_nents; | |
c66ac9db | 3689 | |
1d20bb61 | 3690 | task->task_sg = kmalloc(sizeof(struct scatterlist) * |
c3c74c7a | 3691 | task_sg_nents_padded, GFP_KERNEL); |
ec98f782 AG |
3692 | if (!task->task_sg) { |
3693 | cmd->se_dev->transport->free_task(task); | |
3694 | return -ENOMEM; | |
3695 | } | |
3696 | ||
c3c74c7a | 3697 | sg_init_table(task->task_sg, task_sg_nents_padded); |
c66ac9db | 3698 | |
ec98f782 AG |
3699 | task_size = task->task_size; |
3700 | ||
3701 | /* Build new sgl, only up to task_size */ | |
6708bb27 | 3702 | for_each_sg(task->task_sg, sg, task->task_sg_nents, count) { |
ec98f782 AG |
3703 | if (cmd_sg->length > task_size) |
3704 | break; | |
3705 | ||
3706 | *sg = *cmd_sg; | |
3707 | task_size -= cmd_sg->length; | |
3708 | cmd_sg = sg_next(cmd_sg); | |
c66ac9db | 3709 | } |
c66ac9db | 3710 | |
ec98f782 AG |
3711 | lba += task->task_sectors; |
3712 | sectors -= task->task_sectors; | |
c66ac9db | 3713 | |
ec98f782 AG |
3714 | spin_lock_irqsave(&cmd->t_state_lock, flags); |
3715 | list_add_tail(&task->t_list, &cmd->t_task_list); | |
3716 | spin_unlock_irqrestore(&cmd->t_state_lock, flags); | |
c66ac9db NB |
3717 | } |
3718 | ||
ec98f782 | 3719 | return task_count; |
c66ac9db NB |
3720 | } |
3721 | ||
3722 | static int | |
ec98f782 | 3723 | transport_allocate_control_task(struct se_cmd *cmd) |
c66ac9db | 3724 | { |
c66ac9db | 3725 | struct se_task *task; |
ec98f782 | 3726 | unsigned long flags; |
c66ac9db NB |
3727 | |
3728 | task = transport_generic_get_task(cmd, cmd->data_direction); | |
3729 | if (!task) | |
ec98f782 | 3730 | return -ENOMEM; |
c66ac9db | 3731 | |
af3f00c7 | 3732 | task->task_sg = cmd->t_data_sg; |
c66ac9db | 3733 | task->task_size = cmd->data_length; |
6708bb27 | 3734 | task->task_sg_nents = cmd->t_data_nents; |
c66ac9db | 3735 | |
ec98f782 AG |
3736 | spin_lock_irqsave(&cmd->t_state_lock, flags); |
3737 | list_add_tail(&task->t_list, &cmd->t_task_list); | |
3738 | spin_unlock_irqrestore(&cmd->t_state_lock, flags); | |
c66ac9db | 3739 | |
6708bb27 | 3740 | /* Success! Return number of tasks allocated */ |
a3eedc22 | 3741 | return 1; |
ec98f782 AG |
3742 | } |
3743 | ||
da0f7619 CH |
3744 | /* |
3745 | * Allocate any required ressources to execute the command, and either place | |
3746 | * it on the execution queue if possible. For writes we might not have the | |
3747 | * payload yet, thus notify the fabric via a call to ->write_pending instead. | |
c66ac9db | 3748 | */ |
a1d8b49a | 3749 | int transport_generic_new_cmd(struct se_cmd *cmd) |
c66ac9db | 3750 | { |
da0f7619 | 3751 | struct se_device *dev = cmd->se_dev; |
9ac54987 | 3752 | int task_cdbs, task_cdbs_bidi = 0; |
da0f7619 | 3753 | int set_counts = 1; |
c66ac9db NB |
3754 | int ret = 0; |
3755 | ||
3756 | /* | |
3757 | * Determine is the TCM fabric module has already allocated physical | |
3758 | * memory, and is directly calling transport_generic_map_mem_to_cmd() | |
ec98f782 | 3759 | * beforehand. |
c66ac9db | 3760 | */ |
ec98f782 AG |
3761 | if (!(cmd->se_cmd_flags & SCF_PASSTHROUGH_SG_TO_MEM_NOALLOC) && |
3762 | cmd->data_length) { | |
05d1c7c0 | 3763 | ret = transport_generic_get_mem(cmd); |
c66ac9db | 3764 | if (ret < 0) |
03e98c9e | 3765 | goto out_fail; |
c66ac9db | 3766 | } |
da0f7619 | 3767 | |
1d20bb61 | 3768 | /* |
38b40067 | 3769 | * For BIDI command set up the read tasks first. |
1d20bb61 | 3770 | */ |
da0f7619 | 3771 | if (cmd->t_bidi_data_sg && |
38b40067 CH |
3772 | dev->transport->transport_type != TRANSPORT_PLUGIN_PHBA_PDEV) { |
3773 | BUG_ON(!(cmd->se_cmd_flags & SCF_SCSI_DATA_SG_IO_CDB)); | |
3774 | ||
9ac54987 NB |
3775 | task_cdbs_bidi = transport_allocate_data_tasks(cmd, |
3776 | DMA_FROM_DEVICE, cmd->t_bidi_data_sg, | |
3777 | cmd->t_bidi_data_nents); | |
3778 | if (task_cdbs_bidi <= 0) | |
da0f7619 CH |
3779 | goto out_fail; |
3780 | ||
3781 | atomic_inc(&cmd->t_fe_count); | |
3782 | atomic_inc(&cmd->t_se_count); | |
3783 | set_counts = 0; | |
3784 | } | |
38b40067 CH |
3785 | |
3786 | if (cmd->se_cmd_flags & SCF_SCSI_DATA_SG_IO_CDB) { | |
3787 | task_cdbs = transport_allocate_data_tasks(cmd, | |
3788 | cmd->data_direction, cmd->t_data_sg, | |
3789 | cmd->t_data_nents); | |
3790 | } else { | |
3791 | task_cdbs = transport_allocate_control_task(cmd); | |
3792 | } | |
3793 | ||
410f6702 | 3794 | if (task_cdbs < 0) |
da0f7619 | 3795 | goto out_fail; |
410f6702 RD |
3796 | else if (!task_cdbs && (cmd->se_cmd_flags & SCF_SCSI_DATA_SG_IO_CDB)) { |
3797 | cmd->t_state = TRANSPORT_COMPLETE; | |
3798 | atomic_set(&cmd->t_transport_active, 1); | |
3799 | INIT_WORK(&cmd->work, target_complete_ok_work); | |
3800 | queue_work(target_completion_wq, &cmd->work); | |
3801 | return 0; | |
3802 | } | |
da0f7619 CH |
3803 | |
3804 | if (set_counts) { | |
3805 | atomic_inc(&cmd->t_fe_count); | |
3806 | atomic_inc(&cmd->t_se_count); | |
3807 | } | |
3808 | ||
9ac54987 NB |
3809 | cmd->t_task_list_num = (task_cdbs + task_cdbs_bidi); |
3810 | atomic_set(&cmd->t_task_cdbs_left, cmd->t_task_list_num); | |
3811 | atomic_set(&cmd->t_task_cdbs_ex_left, cmd->t_task_list_num); | |
da0f7619 | 3812 | |
c66ac9db | 3813 | /* |
a1d8b49a | 3814 | * For WRITEs, let the fabric know its buffer is ready.. |
c66ac9db NB |
3815 | * This WRITE struct se_cmd (and all of its associated struct se_task's) |
3816 | * will be added to the struct se_device execution queue after its WRITE | |
3817 | * data has arrived. (ie: It gets handled by the transport processing | |
3818 | * thread a second time) | |
3819 | */ | |
3820 | if (cmd->data_direction == DMA_TO_DEVICE) { | |
3821 | transport_add_tasks_to_state_queue(cmd); | |
3822 | return transport_generic_write_pending(cmd); | |
3823 | } | |
3824 | /* | |
3825 | * Everything else but a WRITE, add the struct se_cmd's struct se_task's | |
3826 | * to the execution queue. | |
3827 | */ | |
3828 | transport_execute_tasks(cmd); | |
3829 | return 0; | |
da0f7619 CH |
3830 | |
3831 | out_fail: | |
3832 | cmd->se_cmd_flags |= SCF_SCSI_CDB_EXCEPTION; | |
3833 | cmd->scsi_sense_reason = TCM_LOGICAL_UNIT_COMMUNICATION_FAILURE; | |
3834 | return -EINVAL; | |
c66ac9db | 3835 | } |
a1d8b49a | 3836 | EXPORT_SYMBOL(transport_generic_new_cmd); |
c66ac9db NB |
3837 | |
3838 | /* transport_generic_process_write(): | |
3839 | * | |
3840 | * | |
3841 | */ | |
3842 | void transport_generic_process_write(struct se_cmd *cmd) | |
3843 | { | |
c66ac9db NB |
3844 | transport_execute_tasks(cmd); |
3845 | } | |
3846 | EXPORT_SYMBOL(transport_generic_process_write); | |
3847 | ||
e057f533 | 3848 | static void transport_write_pending_qf(struct se_cmd *cmd) |
07bde79a | 3849 | { |
f147abb4 NB |
3850 | int ret; |
3851 | ||
3852 | ret = cmd->se_tfo->write_pending(cmd); | |
3853 | if (ret == -EAGAIN || ret == -ENOMEM) { | |
e057f533 CH |
3854 | pr_debug("Handling write_pending QUEUE__FULL: se_cmd: %p\n", |
3855 | cmd); | |
3856 | transport_handle_queue_full(cmd, cmd->se_dev); | |
3857 | } | |
07bde79a NB |
3858 | } |
3859 | ||
c66ac9db NB |
3860 | static int transport_generic_write_pending(struct se_cmd *cmd) |
3861 | { | |
3862 | unsigned long flags; | |
3863 | int ret; | |
3864 | ||
a1d8b49a | 3865 | spin_lock_irqsave(&cmd->t_state_lock, flags); |
c66ac9db | 3866 | cmd->t_state = TRANSPORT_WRITE_PENDING; |
a1d8b49a | 3867 | spin_unlock_irqrestore(&cmd->t_state_lock, flags); |
07bde79a | 3868 | |
c66ac9db NB |
3869 | /* |
3870 | * Clear the se_cmd for WRITE_PENDING status in order to set | |
a1d8b49a | 3871 | * cmd->t_transport_active=0 so that transport_generic_handle_data |
c66ac9db | 3872 | * can be called from HW target mode interrupt code. This is safe |
e3d6f909 | 3873 | * to be called with transport_off=1 before the cmd->se_tfo->write_pending |
c66ac9db NB |
3874 | * because the se_cmd->se_lun pointer is not being cleared. |
3875 | */ | |
3876 | transport_cmd_check_stop(cmd, 1, 0); | |
3877 | ||
3878 | /* | |
3879 | * Call the fabric write_pending function here to let the | |
3880 | * frontend know that WRITE buffers are ready. | |
3881 | */ | |
e3d6f909 | 3882 | ret = cmd->se_tfo->write_pending(cmd); |
f147abb4 | 3883 | if (ret == -EAGAIN || ret == -ENOMEM) |
07bde79a NB |
3884 | goto queue_full; |
3885 | else if (ret < 0) | |
c66ac9db NB |
3886 | return ret; |
3887 | ||
03e98c9e | 3888 | return 1; |
07bde79a NB |
3889 | |
3890 | queue_full: | |
6708bb27 | 3891 | pr_debug("Handling write_pending QUEUE__FULL: se_cmd: %p\n", cmd); |
07bde79a | 3892 | cmd->t_state = TRANSPORT_COMPLETE_QF_WP; |
e057f533 | 3893 | transport_handle_queue_full(cmd, cmd->se_dev); |
f147abb4 | 3894 | return 0; |
c66ac9db NB |
3895 | } |
3896 | ||
39c05f32 | 3897 | void transport_generic_free_cmd(struct se_cmd *cmd, int wait_for_tasks) |
c66ac9db | 3898 | { |
d14921d6 NB |
3899 | if (!(cmd->se_cmd_flags & SCF_SE_LUN_CMD)) { |
3900 | if (wait_for_tasks && cmd->se_tmr_req) | |
3901 | transport_wait_for_tasks(cmd); | |
3902 | ||
35462975 | 3903 | transport_release_cmd(cmd); |
d14921d6 NB |
3904 | } else { |
3905 | if (wait_for_tasks) | |
3906 | transport_wait_for_tasks(cmd); | |
3907 | ||
c66ac9db NB |
3908 | core_dec_lacl_count(cmd->se_sess->se_node_acl, cmd); |
3909 | ||
82f1c8a4 | 3910 | if (cmd->se_lun) |
c66ac9db | 3911 | transport_lun_remove_cmd(cmd); |
c66ac9db | 3912 | |
f4366772 NB |
3913 | transport_free_dev_tasks(cmd); |
3914 | ||
39c05f32 | 3915 | transport_put_cmd(cmd); |
c66ac9db NB |
3916 | } |
3917 | } | |
3918 | EXPORT_SYMBOL(transport_generic_free_cmd); | |
3919 | ||
a17f091d NB |
3920 | /* target_get_sess_cmd - Add command to active ->sess_cmd_list |
3921 | * @se_sess: session to reference | |
3922 | * @se_cmd: command descriptor to add | |
3923 | */ | |
3924 | void target_get_sess_cmd(struct se_session *se_sess, struct se_cmd *se_cmd) | |
3925 | { | |
3926 | unsigned long flags; | |
3927 | ||
3928 | spin_lock_irqsave(&se_sess->sess_cmd_lock, flags); | |
3929 | list_add_tail(&se_cmd->se_cmd_list, &se_sess->sess_cmd_list); | |
3930 | se_cmd->check_release = 1; | |
3931 | spin_unlock_irqrestore(&se_sess->sess_cmd_lock, flags); | |
3932 | } | |
3933 | EXPORT_SYMBOL(target_get_sess_cmd); | |
3934 | ||
3935 | /* target_put_sess_cmd - Check for active I/O shutdown or list delete | |
3936 | * @se_sess: session to reference | |
3937 | * @se_cmd: command descriptor to drop | |
3938 | */ | |
3939 | int target_put_sess_cmd(struct se_session *se_sess, struct se_cmd *se_cmd) | |
3940 | { | |
3941 | unsigned long flags; | |
3942 | ||
3943 | spin_lock_irqsave(&se_sess->sess_cmd_lock, flags); | |
3944 | if (list_empty(&se_cmd->se_cmd_list)) { | |
3945 | spin_unlock_irqrestore(&se_sess->sess_cmd_lock, flags); | |
3946 | WARN_ON(1); | |
3947 | return 0; | |
3948 | } | |
3949 | ||
3950 | if (se_sess->sess_tearing_down && se_cmd->cmd_wait_set) { | |
3951 | spin_unlock_irqrestore(&se_sess->sess_cmd_lock, flags); | |
3952 | complete(&se_cmd->cmd_wait_comp); | |
3953 | return 1; | |
3954 | } | |
3955 | list_del(&se_cmd->se_cmd_list); | |
3956 | spin_unlock_irqrestore(&se_sess->sess_cmd_lock, flags); | |
3957 | ||
3958 | return 0; | |
3959 | } | |
3960 | EXPORT_SYMBOL(target_put_sess_cmd); | |
3961 | ||
3962 | /* target_splice_sess_cmd_list - Split active cmds into sess_wait_list | |
3963 | * @se_sess: session to split | |
3964 | */ | |
3965 | void target_splice_sess_cmd_list(struct se_session *se_sess) | |
3966 | { | |
3967 | struct se_cmd *se_cmd; | |
3968 | unsigned long flags; | |
3969 | ||
3970 | WARN_ON(!list_empty(&se_sess->sess_wait_list)); | |
3971 | INIT_LIST_HEAD(&se_sess->sess_wait_list); | |
3972 | ||
3973 | spin_lock_irqsave(&se_sess->sess_cmd_lock, flags); | |
3974 | se_sess->sess_tearing_down = 1; | |
3975 | ||
3976 | list_splice_init(&se_sess->sess_cmd_list, &se_sess->sess_wait_list); | |
3977 | ||
3978 | list_for_each_entry(se_cmd, &se_sess->sess_wait_list, se_cmd_list) | |
3979 | se_cmd->cmd_wait_set = 1; | |
3980 | ||
3981 | spin_unlock_irqrestore(&se_sess->sess_cmd_lock, flags); | |
3982 | } | |
3983 | EXPORT_SYMBOL(target_splice_sess_cmd_list); | |
3984 | ||
3985 | /* target_wait_for_sess_cmds - Wait for outstanding descriptors | |
3986 | * @se_sess: session to wait for active I/O | |
3987 | * @wait_for_tasks: Make extra transport_wait_for_tasks call | |
3988 | */ | |
3989 | void target_wait_for_sess_cmds( | |
3990 | struct se_session *se_sess, | |
3991 | int wait_for_tasks) | |
3992 | { | |
3993 | struct se_cmd *se_cmd, *tmp_cmd; | |
3994 | bool rc = false; | |
3995 | ||
3996 | list_for_each_entry_safe(se_cmd, tmp_cmd, | |
3997 | &se_sess->sess_wait_list, se_cmd_list) { | |
3998 | list_del(&se_cmd->se_cmd_list); | |
3999 | ||
4000 | pr_debug("Waiting for se_cmd: %p t_state: %d, fabric state:" | |
4001 | " %d\n", se_cmd, se_cmd->t_state, | |
4002 | se_cmd->se_tfo->get_cmd_state(se_cmd)); | |
4003 | ||
4004 | if (wait_for_tasks) { | |
4005 | pr_debug("Calling transport_wait_for_tasks se_cmd: %p t_state: %d," | |
4006 | " fabric state: %d\n", se_cmd, se_cmd->t_state, | |
4007 | se_cmd->se_tfo->get_cmd_state(se_cmd)); | |
4008 | ||
4009 | rc = transport_wait_for_tasks(se_cmd); | |
4010 | ||
4011 | pr_debug("After transport_wait_for_tasks se_cmd: %p t_state: %d," | |
4012 | " fabric state: %d\n", se_cmd, se_cmd->t_state, | |
4013 | se_cmd->se_tfo->get_cmd_state(se_cmd)); | |
4014 | } | |
4015 | ||
4016 | if (!rc) { | |
4017 | wait_for_completion(&se_cmd->cmd_wait_comp); | |
4018 | pr_debug("After cmd_wait_comp: se_cmd: %p t_state: %d" | |
4019 | " fabric state: %d\n", se_cmd, se_cmd->t_state, | |
4020 | se_cmd->se_tfo->get_cmd_state(se_cmd)); | |
4021 | } | |
4022 | ||
4023 | se_cmd->se_tfo->release_cmd(se_cmd); | |
4024 | } | |
4025 | } | |
4026 | EXPORT_SYMBOL(target_wait_for_sess_cmds); | |
4027 | ||
c66ac9db NB |
4028 | /* transport_lun_wait_for_tasks(): |
4029 | * | |
4030 | * Called from ConfigFS context to stop the passed struct se_cmd to allow | |
4031 | * an struct se_lun to be successfully shutdown. | |
4032 | */ | |
4033 | static int transport_lun_wait_for_tasks(struct se_cmd *cmd, struct se_lun *lun) | |
4034 | { | |
4035 | unsigned long flags; | |
4036 | int ret; | |
4037 | /* | |
4038 | * If the frontend has already requested this struct se_cmd to | |
4039 | * be stopped, we can safely ignore this struct se_cmd. | |
4040 | */ | |
a1d8b49a AG |
4041 | spin_lock_irqsave(&cmd->t_state_lock, flags); |
4042 | if (atomic_read(&cmd->t_transport_stop)) { | |
4043 | atomic_set(&cmd->transport_lun_stop, 0); | |
6708bb27 | 4044 | pr_debug("ConfigFS ITT[0x%08x] - t_transport_stop ==" |
e3d6f909 | 4045 | " TRUE, skipping\n", cmd->se_tfo->get_task_tag(cmd)); |
a1d8b49a | 4046 | spin_unlock_irqrestore(&cmd->t_state_lock, flags); |
c66ac9db | 4047 | transport_cmd_check_stop(cmd, 1, 0); |
e3d6f909 | 4048 | return -EPERM; |
c66ac9db | 4049 | } |
a1d8b49a AG |
4050 | atomic_set(&cmd->transport_lun_fe_stop, 1); |
4051 | spin_unlock_irqrestore(&cmd->t_state_lock, flags); | |
c66ac9db | 4052 | |
5951146d | 4053 | wake_up_interruptible(&cmd->se_dev->dev_queue_obj.thread_wq); |
c66ac9db NB |
4054 | |
4055 | ret = transport_stop_tasks_for_cmd(cmd); | |
4056 | ||
6708bb27 AG |
4057 | pr_debug("ConfigFS: cmd: %p t_tasks: %d stop tasks ret:" |
4058 | " %d\n", cmd, cmd->t_task_list_num, ret); | |
c66ac9db | 4059 | if (!ret) { |
6708bb27 | 4060 | pr_debug("ConfigFS: ITT[0x%08x] - stopping cmd....\n", |
e3d6f909 | 4061 | cmd->se_tfo->get_task_tag(cmd)); |
a1d8b49a | 4062 | wait_for_completion(&cmd->transport_lun_stop_comp); |
6708bb27 | 4063 | pr_debug("ConfigFS: ITT[0x%08x] - stopped cmd....\n", |
e3d6f909 | 4064 | cmd->se_tfo->get_task_tag(cmd)); |
c66ac9db | 4065 | } |
3df8d40b | 4066 | transport_remove_cmd_from_queue(cmd); |
c66ac9db NB |
4067 | |
4068 | return 0; | |
4069 | } | |
4070 | ||
c66ac9db NB |
4071 | static void __transport_clear_lun_from_sessions(struct se_lun *lun) |
4072 | { | |
4073 | struct se_cmd *cmd = NULL; | |
4074 | unsigned long lun_flags, cmd_flags; | |
4075 | /* | |
4076 | * Do exception processing and return CHECK_CONDITION status to the | |
4077 | * Initiator Port. | |
4078 | */ | |
4079 | spin_lock_irqsave(&lun->lun_cmd_lock, lun_flags); | |
5951146d AG |
4080 | while (!list_empty(&lun->lun_cmd_list)) { |
4081 | cmd = list_first_entry(&lun->lun_cmd_list, | |
4082 | struct se_cmd, se_lun_node); | |
4083 | list_del(&cmd->se_lun_node); | |
4084 | ||
a1d8b49a | 4085 | atomic_set(&cmd->transport_lun_active, 0); |
c66ac9db NB |
4086 | /* |
4087 | * This will notify iscsi_target_transport.c: | |
4088 | * transport_cmd_check_stop() that a LUN shutdown is in | |
4089 | * progress for the iscsi_cmd_t. | |
4090 | */ | |
a1d8b49a | 4091 | spin_lock(&cmd->t_state_lock); |
6708bb27 | 4092 | pr_debug("SE_LUN[%d] - Setting cmd->transport" |
c66ac9db | 4093 | "_lun_stop for ITT: 0x%08x\n", |
e3d6f909 AG |
4094 | cmd->se_lun->unpacked_lun, |
4095 | cmd->se_tfo->get_task_tag(cmd)); | |
a1d8b49a AG |
4096 | atomic_set(&cmd->transport_lun_stop, 1); |
4097 | spin_unlock(&cmd->t_state_lock); | |
c66ac9db NB |
4098 | |
4099 | spin_unlock_irqrestore(&lun->lun_cmd_lock, lun_flags); | |
4100 | ||
6708bb27 AG |
4101 | if (!cmd->se_lun) { |
4102 | pr_err("ITT: 0x%08x, [i,t]_state: %u/%u\n", | |
e3d6f909 AG |
4103 | cmd->se_tfo->get_task_tag(cmd), |
4104 | cmd->se_tfo->get_cmd_state(cmd), cmd->t_state); | |
c66ac9db NB |
4105 | BUG(); |
4106 | } | |
4107 | /* | |
4108 | * If the Storage engine still owns the iscsi_cmd_t, determine | |
4109 | * and/or stop its context. | |
4110 | */ | |
6708bb27 | 4111 | pr_debug("SE_LUN[%d] - ITT: 0x%08x before transport" |
e3d6f909 AG |
4112 | "_lun_wait_for_tasks()\n", cmd->se_lun->unpacked_lun, |
4113 | cmd->se_tfo->get_task_tag(cmd)); | |
c66ac9db | 4114 | |
e3d6f909 | 4115 | if (transport_lun_wait_for_tasks(cmd, cmd->se_lun) < 0) { |
c66ac9db NB |
4116 | spin_lock_irqsave(&lun->lun_cmd_lock, lun_flags); |
4117 | continue; | |
4118 | } | |
4119 | ||
6708bb27 | 4120 | pr_debug("SE_LUN[%d] - ITT: 0x%08x after transport_lun" |
c66ac9db | 4121 | "_wait_for_tasks(): SUCCESS\n", |
e3d6f909 AG |
4122 | cmd->se_lun->unpacked_lun, |
4123 | cmd->se_tfo->get_task_tag(cmd)); | |
c66ac9db | 4124 | |
a1d8b49a | 4125 | spin_lock_irqsave(&cmd->t_state_lock, cmd_flags); |
6708bb27 | 4126 | if (!atomic_read(&cmd->transport_dev_active)) { |
a1d8b49a | 4127 | spin_unlock_irqrestore(&cmd->t_state_lock, cmd_flags); |
c66ac9db NB |
4128 | goto check_cond; |
4129 | } | |
a1d8b49a | 4130 | atomic_set(&cmd->transport_dev_active, 0); |
c66ac9db | 4131 | transport_all_task_dev_remove_state(cmd); |
a1d8b49a | 4132 | spin_unlock_irqrestore(&cmd->t_state_lock, cmd_flags); |
c66ac9db NB |
4133 | |
4134 | transport_free_dev_tasks(cmd); | |
4135 | /* | |
4136 | * The Storage engine stopped this struct se_cmd before it was | |
4137 | * send to the fabric frontend for delivery back to the | |
4138 | * Initiator Node. Return this SCSI CDB back with an | |
4139 | * CHECK_CONDITION status. | |
4140 | */ | |
4141 | check_cond: | |
4142 | transport_send_check_condition_and_sense(cmd, | |
4143 | TCM_NON_EXISTENT_LUN, 0); | |
4144 | /* | |
4145 | * If the fabric frontend is waiting for this iscsi_cmd_t to | |
4146 | * be released, notify the waiting thread now that LU has | |
4147 | * finished accessing it. | |
4148 | */ | |
a1d8b49a AG |
4149 | spin_lock_irqsave(&cmd->t_state_lock, cmd_flags); |
4150 | if (atomic_read(&cmd->transport_lun_fe_stop)) { | |
6708bb27 | 4151 | pr_debug("SE_LUN[%d] - Detected FE stop for" |
c66ac9db NB |
4152 | " struct se_cmd: %p ITT: 0x%08x\n", |
4153 | lun->unpacked_lun, | |
e3d6f909 | 4154 | cmd, cmd->se_tfo->get_task_tag(cmd)); |
c66ac9db | 4155 | |
a1d8b49a | 4156 | spin_unlock_irqrestore(&cmd->t_state_lock, |
c66ac9db NB |
4157 | cmd_flags); |
4158 | transport_cmd_check_stop(cmd, 1, 0); | |
a1d8b49a | 4159 | complete(&cmd->transport_lun_fe_stop_comp); |
c66ac9db NB |
4160 | spin_lock_irqsave(&lun->lun_cmd_lock, lun_flags); |
4161 | continue; | |
4162 | } | |
6708bb27 | 4163 | pr_debug("SE_LUN[%d] - ITT: 0x%08x finished processing\n", |
e3d6f909 | 4164 | lun->unpacked_lun, cmd->se_tfo->get_task_tag(cmd)); |
c66ac9db | 4165 | |
a1d8b49a | 4166 | spin_unlock_irqrestore(&cmd->t_state_lock, cmd_flags); |
c66ac9db NB |
4167 | spin_lock_irqsave(&lun->lun_cmd_lock, lun_flags); |
4168 | } | |
4169 | spin_unlock_irqrestore(&lun->lun_cmd_lock, lun_flags); | |
4170 | } | |
4171 | ||
4172 | static int transport_clear_lun_thread(void *p) | |
4173 | { | |
4174 | struct se_lun *lun = (struct se_lun *)p; | |
4175 | ||
4176 | __transport_clear_lun_from_sessions(lun); | |
4177 | complete(&lun->lun_shutdown_comp); | |
4178 | ||
4179 | return 0; | |
4180 | } | |
4181 | ||
4182 | int transport_clear_lun_from_sessions(struct se_lun *lun) | |
4183 | { | |
4184 | struct task_struct *kt; | |
4185 | ||
5951146d | 4186 | kt = kthread_run(transport_clear_lun_thread, lun, |
c66ac9db NB |
4187 | "tcm_cl_%u", lun->unpacked_lun); |
4188 | if (IS_ERR(kt)) { | |
6708bb27 | 4189 | pr_err("Unable to start clear_lun thread\n"); |
e3d6f909 | 4190 | return PTR_ERR(kt); |
c66ac9db NB |
4191 | } |
4192 | wait_for_completion(&lun->lun_shutdown_comp); | |
4193 | ||
4194 | return 0; | |
4195 | } | |
4196 | ||
d14921d6 NB |
4197 | /** |
4198 | * transport_wait_for_tasks - wait for completion to occur | |
4199 | * @cmd: command to wait | |
c66ac9db | 4200 | * |
d14921d6 NB |
4201 | * Called from frontend fabric context to wait for storage engine |
4202 | * to pause and/or release frontend generated struct se_cmd. | |
c66ac9db | 4203 | */ |
a17f091d | 4204 | bool transport_wait_for_tasks(struct se_cmd *cmd) |
c66ac9db NB |
4205 | { |
4206 | unsigned long flags; | |
4207 | ||
a1d8b49a | 4208 | spin_lock_irqsave(&cmd->t_state_lock, flags); |
d14921d6 NB |
4209 | if (!(cmd->se_cmd_flags & SCF_SE_LUN_CMD) && !(cmd->se_tmr_req)) { |
4210 | spin_unlock_irqrestore(&cmd->t_state_lock, flags); | |
a17f091d | 4211 | return false; |
d14921d6 NB |
4212 | } |
4213 | /* | |
4214 | * Only perform a possible wait_for_tasks if SCF_SUPPORTED_SAM_OPCODE | |
4215 | * has been set in transport_set_supported_SAM_opcode(). | |
4216 | */ | |
4217 | if (!(cmd->se_cmd_flags & SCF_SUPPORTED_SAM_OPCODE) && !cmd->se_tmr_req) { | |
4218 | spin_unlock_irqrestore(&cmd->t_state_lock, flags); | |
a17f091d | 4219 | return false; |
d14921d6 | 4220 | } |
c66ac9db NB |
4221 | /* |
4222 | * If we are already stopped due to an external event (ie: LUN shutdown) | |
4223 | * sleep until the connection can have the passed struct se_cmd back. | |
a1d8b49a | 4224 | * The cmd->transport_lun_stopped_sem will be upped by |
c66ac9db NB |
4225 | * transport_clear_lun_from_sessions() once the ConfigFS context caller |
4226 | * has completed its operation on the struct se_cmd. | |
4227 | */ | |
a1d8b49a | 4228 | if (atomic_read(&cmd->transport_lun_stop)) { |
c66ac9db | 4229 | |
6708bb27 | 4230 | pr_debug("wait_for_tasks: Stopping" |
e3d6f909 | 4231 | " wait_for_completion(&cmd->t_tasktransport_lun_fe" |
c66ac9db | 4232 | "_stop_comp); for ITT: 0x%08x\n", |
e3d6f909 | 4233 | cmd->se_tfo->get_task_tag(cmd)); |
c66ac9db NB |
4234 | /* |
4235 | * There is a special case for WRITES where a FE exception + | |
4236 | * LUN shutdown means ConfigFS context is still sleeping on | |
4237 | * transport_lun_stop_comp in transport_lun_wait_for_tasks(). | |
4238 | * We go ahead and up transport_lun_stop_comp just to be sure | |
4239 | * here. | |
4240 | */ | |
a1d8b49a AG |
4241 | spin_unlock_irqrestore(&cmd->t_state_lock, flags); |
4242 | complete(&cmd->transport_lun_stop_comp); | |
4243 | wait_for_completion(&cmd->transport_lun_fe_stop_comp); | |
4244 | spin_lock_irqsave(&cmd->t_state_lock, flags); | |
c66ac9db NB |
4245 | |
4246 | transport_all_task_dev_remove_state(cmd); | |
4247 | /* | |
4248 | * At this point, the frontend who was the originator of this | |
4249 | * struct se_cmd, now owns the structure and can be released through | |
4250 | * normal means below. | |
4251 | */ | |
6708bb27 | 4252 | pr_debug("wait_for_tasks: Stopped" |
e3d6f909 | 4253 | " wait_for_completion(&cmd->t_tasktransport_lun_fe_" |
c66ac9db | 4254 | "stop_comp); for ITT: 0x%08x\n", |
e3d6f909 | 4255 | cmd->se_tfo->get_task_tag(cmd)); |
c66ac9db | 4256 | |
a1d8b49a | 4257 | atomic_set(&cmd->transport_lun_stop, 0); |
c66ac9db | 4258 | } |
a1d8b49a | 4259 | if (!atomic_read(&cmd->t_transport_active) || |
d14921d6 NB |
4260 | atomic_read(&cmd->t_transport_aborted)) { |
4261 | spin_unlock_irqrestore(&cmd->t_state_lock, flags); | |
a17f091d | 4262 | return false; |
d14921d6 | 4263 | } |
c66ac9db | 4264 | |
a1d8b49a | 4265 | atomic_set(&cmd->t_transport_stop, 1); |
c66ac9db | 4266 | |
6708bb27 | 4267 | pr_debug("wait_for_tasks: Stopping %p ITT: 0x%08x" |
f2da9dbd CH |
4268 | " i_state: %d, t_state: %d, t_transport_stop = TRUE\n", |
4269 | cmd, cmd->se_tfo->get_task_tag(cmd), | |
4270 | cmd->se_tfo->get_cmd_state(cmd), cmd->t_state); | |
c66ac9db | 4271 | |
a1d8b49a | 4272 | spin_unlock_irqrestore(&cmd->t_state_lock, flags); |
c66ac9db | 4273 | |
5951146d | 4274 | wake_up_interruptible(&cmd->se_dev->dev_queue_obj.thread_wq); |
c66ac9db | 4275 | |
a1d8b49a | 4276 | wait_for_completion(&cmd->t_transport_stop_comp); |
c66ac9db | 4277 | |
a1d8b49a AG |
4278 | spin_lock_irqsave(&cmd->t_state_lock, flags); |
4279 | atomic_set(&cmd->t_transport_active, 0); | |
4280 | atomic_set(&cmd->t_transport_stop, 0); | |
c66ac9db | 4281 | |
6708bb27 | 4282 | pr_debug("wait_for_tasks: Stopped wait_for_compltion(" |
a1d8b49a | 4283 | "&cmd->t_transport_stop_comp) for ITT: 0x%08x\n", |
e3d6f909 | 4284 | cmd->se_tfo->get_task_tag(cmd)); |
c66ac9db | 4285 | |
d14921d6 | 4286 | spin_unlock_irqrestore(&cmd->t_state_lock, flags); |
a17f091d NB |
4287 | |
4288 | return true; | |
c66ac9db | 4289 | } |
d14921d6 | 4290 | EXPORT_SYMBOL(transport_wait_for_tasks); |
c66ac9db NB |
4291 | |
4292 | static int transport_get_sense_codes( | |
4293 | struct se_cmd *cmd, | |
4294 | u8 *asc, | |
4295 | u8 *ascq) | |
4296 | { | |
4297 | *asc = cmd->scsi_asc; | |
4298 | *ascq = cmd->scsi_ascq; | |
4299 | ||
4300 | return 0; | |
4301 | } | |
4302 | ||
4303 | static int transport_set_sense_codes( | |
4304 | struct se_cmd *cmd, | |
4305 | u8 asc, | |
4306 | u8 ascq) | |
4307 | { | |
4308 | cmd->scsi_asc = asc; | |
4309 | cmd->scsi_ascq = ascq; | |
4310 | ||
4311 | return 0; | |
4312 | } | |
4313 | ||
4314 | int transport_send_check_condition_and_sense( | |
4315 | struct se_cmd *cmd, | |
4316 | u8 reason, | |
4317 | int from_transport) | |
4318 | { | |
4319 | unsigned char *buffer = cmd->sense_buffer; | |
4320 | unsigned long flags; | |
4321 | int offset; | |
4322 | u8 asc = 0, ascq = 0; | |
4323 | ||
a1d8b49a | 4324 | spin_lock_irqsave(&cmd->t_state_lock, flags); |
c66ac9db | 4325 | if (cmd->se_cmd_flags & SCF_SENT_CHECK_CONDITION) { |
a1d8b49a | 4326 | spin_unlock_irqrestore(&cmd->t_state_lock, flags); |
c66ac9db NB |
4327 | return 0; |
4328 | } | |
4329 | cmd->se_cmd_flags |= SCF_SENT_CHECK_CONDITION; | |
a1d8b49a | 4330 | spin_unlock_irqrestore(&cmd->t_state_lock, flags); |
c66ac9db NB |
4331 | |
4332 | if (!reason && from_transport) | |
4333 | goto after_reason; | |
4334 | ||
4335 | if (!from_transport) | |
4336 | cmd->se_cmd_flags |= SCF_EMULATED_TASK_SENSE; | |
4337 | /* | |
4338 | * Data Segment and SenseLength of the fabric response PDU. | |
4339 | * | |
4340 | * TRANSPORT_SENSE_BUFFER is now set to SCSI_SENSE_BUFFERSIZE | |
4341 | * from include/scsi/scsi_cmnd.h | |
4342 | */ | |
e3d6f909 | 4343 | offset = cmd->se_tfo->set_fabric_sense_len(cmd, |
c66ac9db NB |
4344 | TRANSPORT_SENSE_BUFFER); |
4345 | /* | |
4346 | * Actual SENSE DATA, see SPC-3 7.23.2 SPC_SENSE_KEY_OFFSET uses | |
4347 | * SENSE KEY values from include/scsi/scsi.h | |
4348 | */ | |
4349 | switch (reason) { | |
4350 | case TCM_NON_EXISTENT_LUN: | |
eb39d340 NB |
4351 | /* CURRENT ERROR */ |
4352 | buffer[offset] = 0x70; | |
4353 | /* ILLEGAL REQUEST */ | |
4354 | buffer[offset+SPC_SENSE_KEY_OFFSET] = ILLEGAL_REQUEST; | |
4355 | /* LOGICAL UNIT NOT SUPPORTED */ | |
4356 | buffer[offset+SPC_ASC_KEY_OFFSET] = 0x25; | |
4357 | break; | |
c66ac9db NB |
4358 | case TCM_UNSUPPORTED_SCSI_OPCODE: |
4359 | case TCM_SECTOR_COUNT_TOO_MANY: | |
4360 | /* CURRENT ERROR */ | |
4361 | buffer[offset] = 0x70; | |
4362 | /* ILLEGAL REQUEST */ | |
4363 | buffer[offset+SPC_SENSE_KEY_OFFSET] = ILLEGAL_REQUEST; | |
4364 | /* INVALID COMMAND OPERATION CODE */ | |
4365 | buffer[offset+SPC_ASC_KEY_OFFSET] = 0x20; | |
4366 | break; | |
4367 | case TCM_UNKNOWN_MODE_PAGE: | |
4368 | /* CURRENT ERROR */ | |
4369 | buffer[offset] = 0x70; | |
4370 | /* ILLEGAL REQUEST */ | |
4371 | buffer[offset+SPC_SENSE_KEY_OFFSET] = ILLEGAL_REQUEST; | |
4372 | /* INVALID FIELD IN CDB */ | |
4373 | buffer[offset+SPC_ASC_KEY_OFFSET] = 0x24; | |
4374 | break; | |
4375 | case TCM_CHECK_CONDITION_ABORT_CMD: | |
4376 | /* CURRENT ERROR */ | |
4377 | buffer[offset] = 0x70; | |
4378 | /* ABORTED COMMAND */ | |
4379 | buffer[offset+SPC_SENSE_KEY_OFFSET] = ABORTED_COMMAND; | |
4380 | /* BUS DEVICE RESET FUNCTION OCCURRED */ | |
4381 | buffer[offset+SPC_ASC_KEY_OFFSET] = 0x29; | |
4382 | buffer[offset+SPC_ASCQ_KEY_OFFSET] = 0x03; | |
4383 | break; | |
4384 | case TCM_INCORRECT_AMOUNT_OF_DATA: | |
4385 | /* CURRENT ERROR */ | |
4386 | buffer[offset] = 0x70; | |
4387 | /* ABORTED COMMAND */ | |
4388 | buffer[offset+SPC_SENSE_KEY_OFFSET] = ABORTED_COMMAND; | |
4389 | /* WRITE ERROR */ | |
4390 | buffer[offset+SPC_ASC_KEY_OFFSET] = 0x0c; | |
4391 | /* NOT ENOUGH UNSOLICITED DATA */ | |
4392 | buffer[offset+SPC_ASCQ_KEY_OFFSET] = 0x0d; | |
4393 | break; | |
4394 | case TCM_INVALID_CDB_FIELD: | |
4395 | /* CURRENT ERROR */ | |
4396 | buffer[offset] = 0x70; | |
4397 | /* ABORTED COMMAND */ | |
4398 | buffer[offset+SPC_SENSE_KEY_OFFSET] = ABORTED_COMMAND; | |
4399 | /* INVALID FIELD IN CDB */ | |
4400 | buffer[offset+SPC_ASC_KEY_OFFSET] = 0x24; | |
4401 | break; | |
4402 | case TCM_INVALID_PARAMETER_LIST: | |
4403 | /* CURRENT ERROR */ | |
4404 | buffer[offset] = 0x70; | |
4405 | /* ABORTED COMMAND */ | |
4406 | buffer[offset+SPC_SENSE_KEY_OFFSET] = ABORTED_COMMAND; | |
4407 | /* INVALID FIELD IN PARAMETER LIST */ | |
4408 | buffer[offset+SPC_ASC_KEY_OFFSET] = 0x26; | |
4409 | break; | |
4410 | case TCM_UNEXPECTED_UNSOLICITED_DATA: | |
4411 | /* CURRENT ERROR */ | |
4412 | buffer[offset] = 0x70; | |
4413 | /* ABORTED COMMAND */ | |
4414 | buffer[offset+SPC_SENSE_KEY_OFFSET] = ABORTED_COMMAND; | |
4415 | /* WRITE ERROR */ | |
4416 | buffer[offset+SPC_ASC_KEY_OFFSET] = 0x0c; | |
4417 | /* UNEXPECTED_UNSOLICITED_DATA */ | |
4418 | buffer[offset+SPC_ASCQ_KEY_OFFSET] = 0x0c; | |
4419 | break; | |
4420 | case TCM_SERVICE_CRC_ERROR: | |
4421 | /* CURRENT ERROR */ | |
4422 | buffer[offset] = 0x70; | |
4423 | /* ABORTED COMMAND */ | |
4424 | buffer[offset+SPC_SENSE_KEY_OFFSET] = ABORTED_COMMAND; | |
4425 | /* PROTOCOL SERVICE CRC ERROR */ | |
4426 | buffer[offset+SPC_ASC_KEY_OFFSET] = 0x47; | |
4427 | /* N/A */ | |
4428 | buffer[offset+SPC_ASCQ_KEY_OFFSET] = 0x05; | |
4429 | break; | |
4430 | case TCM_SNACK_REJECTED: | |
4431 | /* CURRENT ERROR */ | |
4432 | buffer[offset] = 0x70; | |
4433 | /* ABORTED COMMAND */ | |
4434 | buffer[offset+SPC_SENSE_KEY_OFFSET] = ABORTED_COMMAND; | |
4435 | /* READ ERROR */ | |
4436 | buffer[offset+SPC_ASC_KEY_OFFSET] = 0x11; | |
4437 | /* FAILED RETRANSMISSION REQUEST */ | |
4438 | buffer[offset+SPC_ASCQ_KEY_OFFSET] = 0x13; | |
4439 | break; | |
4440 | case TCM_WRITE_PROTECTED: | |
4441 | /* CURRENT ERROR */ | |
4442 | buffer[offset] = 0x70; | |
4443 | /* DATA PROTECT */ | |
4444 | buffer[offset+SPC_SENSE_KEY_OFFSET] = DATA_PROTECT; | |
4445 | /* WRITE PROTECTED */ | |
4446 | buffer[offset+SPC_ASC_KEY_OFFSET] = 0x27; | |
4447 | break; | |
4448 | case TCM_CHECK_CONDITION_UNIT_ATTENTION: | |
4449 | /* CURRENT ERROR */ | |
4450 | buffer[offset] = 0x70; | |
4451 | /* UNIT ATTENTION */ | |
4452 | buffer[offset+SPC_SENSE_KEY_OFFSET] = UNIT_ATTENTION; | |
4453 | core_scsi3_ua_for_check_condition(cmd, &asc, &ascq); | |
4454 | buffer[offset+SPC_ASC_KEY_OFFSET] = asc; | |
4455 | buffer[offset+SPC_ASCQ_KEY_OFFSET] = ascq; | |
4456 | break; | |
4457 | case TCM_CHECK_CONDITION_NOT_READY: | |
4458 | /* CURRENT ERROR */ | |
4459 | buffer[offset] = 0x70; | |
4460 | /* Not Ready */ | |
4461 | buffer[offset+SPC_SENSE_KEY_OFFSET] = NOT_READY; | |
4462 | transport_get_sense_codes(cmd, &asc, &ascq); | |
4463 | buffer[offset+SPC_ASC_KEY_OFFSET] = asc; | |
4464 | buffer[offset+SPC_ASCQ_KEY_OFFSET] = ascq; | |
4465 | break; | |
4466 | case TCM_LOGICAL_UNIT_COMMUNICATION_FAILURE: | |
4467 | default: | |
4468 | /* CURRENT ERROR */ | |
4469 | buffer[offset] = 0x70; | |
4470 | /* ILLEGAL REQUEST */ | |
4471 | buffer[offset+SPC_SENSE_KEY_OFFSET] = ILLEGAL_REQUEST; | |
4472 | /* LOGICAL UNIT COMMUNICATION FAILURE */ | |
4473 | buffer[offset+SPC_ASC_KEY_OFFSET] = 0x80; | |
4474 | break; | |
4475 | } | |
4476 | /* | |
4477 | * This code uses linux/include/scsi/scsi.h SAM status codes! | |
4478 | */ | |
4479 | cmd->scsi_status = SAM_STAT_CHECK_CONDITION; | |
4480 | /* | |
4481 | * Automatically padded, this value is encoded in the fabric's | |
4482 | * data_length response PDU containing the SCSI defined sense data. | |
4483 | */ | |
4484 | cmd->scsi_sense_length = TRANSPORT_SENSE_BUFFER + offset; | |
4485 | ||
4486 | after_reason: | |
07bde79a | 4487 | return cmd->se_tfo->queue_status(cmd); |
c66ac9db NB |
4488 | } |
4489 | EXPORT_SYMBOL(transport_send_check_condition_and_sense); | |
4490 | ||
4491 | int transport_check_aborted_status(struct se_cmd *cmd, int send_status) | |
4492 | { | |
4493 | int ret = 0; | |
4494 | ||
a1d8b49a | 4495 | if (atomic_read(&cmd->t_transport_aborted) != 0) { |
6708bb27 | 4496 | if (!send_status || |
c66ac9db NB |
4497 | (cmd->se_cmd_flags & SCF_SENT_DELAYED_TAS)) |
4498 | return 1; | |
4499 | #if 0 | |
6708bb27 | 4500 | pr_debug("Sending delayed SAM_STAT_TASK_ABORTED" |
c66ac9db | 4501 | " status for CDB: 0x%02x ITT: 0x%08x\n", |
a1d8b49a | 4502 | cmd->t_task_cdb[0], |
e3d6f909 | 4503 | cmd->se_tfo->get_task_tag(cmd)); |
c66ac9db NB |
4504 | #endif |
4505 | cmd->se_cmd_flags |= SCF_SENT_DELAYED_TAS; | |
e3d6f909 | 4506 | cmd->se_tfo->queue_status(cmd); |
c66ac9db NB |
4507 | ret = 1; |
4508 | } | |
4509 | return ret; | |
4510 | } | |
4511 | EXPORT_SYMBOL(transport_check_aborted_status); | |
4512 | ||
4513 | void transport_send_task_abort(struct se_cmd *cmd) | |
4514 | { | |
c252f003 NB |
4515 | unsigned long flags; |
4516 | ||
4517 | spin_lock_irqsave(&cmd->t_state_lock, flags); | |
4518 | if (cmd->se_cmd_flags & SCF_SENT_CHECK_CONDITION) { | |
4519 | spin_unlock_irqrestore(&cmd->t_state_lock, flags); | |
4520 | return; | |
4521 | } | |
4522 | spin_unlock_irqrestore(&cmd->t_state_lock, flags); | |
4523 | ||
c66ac9db NB |
4524 | /* |
4525 | * If there are still expected incoming fabric WRITEs, we wait | |
4526 | * until until they have completed before sending a TASK_ABORTED | |
4527 | * response. This response with TASK_ABORTED status will be | |
4528 | * queued back to fabric module by transport_check_aborted_status(). | |
4529 | */ | |
4530 | if (cmd->data_direction == DMA_TO_DEVICE) { | |
e3d6f909 | 4531 | if (cmd->se_tfo->write_pending_status(cmd) != 0) { |
a1d8b49a | 4532 | atomic_inc(&cmd->t_transport_aborted); |
c66ac9db | 4533 | smp_mb__after_atomic_inc(); |
c66ac9db NB |
4534 | } |
4535 | } | |
4536 | cmd->scsi_status = SAM_STAT_TASK_ABORTED; | |
4537 | #if 0 | |
6708bb27 | 4538 | pr_debug("Setting SAM_STAT_TASK_ABORTED status for CDB: 0x%02x," |
a1d8b49a | 4539 | " ITT: 0x%08x\n", cmd->t_task_cdb[0], |
e3d6f909 | 4540 | cmd->se_tfo->get_task_tag(cmd)); |
c66ac9db | 4541 | #endif |
e3d6f909 | 4542 | cmd->se_tfo->queue_status(cmd); |
c66ac9db NB |
4543 | } |
4544 | ||
e26d99ae | 4545 | static int transport_generic_do_tmr(struct se_cmd *cmd) |
c66ac9db | 4546 | { |
5951146d | 4547 | struct se_device *dev = cmd->se_dev; |
c66ac9db NB |
4548 | struct se_tmr_req *tmr = cmd->se_tmr_req; |
4549 | int ret; | |
4550 | ||
4551 | switch (tmr->function) { | |
5c6cd613 | 4552 | case TMR_ABORT_TASK: |
c66ac9db NB |
4553 | tmr->response = TMR_FUNCTION_REJECTED; |
4554 | break; | |
5c6cd613 NB |
4555 | case TMR_ABORT_TASK_SET: |
4556 | case TMR_CLEAR_ACA: | |
4557 | case TMR_CLEAR_TASK_SET: | |
c66ac9db NB |
4558 | tmr->response = TMR_TASK_MGMT_FUNCTION_NOT_SUPPORTED; |
4559 | break; | |
5c6cd613 | 4560 | case TMR_LUN_RESET: |
c66ac9db NB |
4561 | ret = core_tmr_lun_reset(dev, tmr, NULL, NULL); |
4562 | tmr->response = (!ret) ? TMR_FUNCTION_COMPLETE : | |
4563 | TMR_FUNCTION_REJECTED; | |
4564 | break; | |
5c6cd613 | 4565 | case TMR_TARGET_WARM_RESET: |
c66ac9db NB |
4566 | tmr->response = TMR_FUNCTION_REJECTED; |
4567 | break; | |
5c6cd613 | 4568 | case TMR_TARGET_COLD_RESET: |
c66ac9db NB |
4569 | tmr->response = TMR_FUNCTION_REJECTED; |
4570 | break; | |
c66ac9db | 4571 | default: |
6708bb27 | 4572 | pr_err("Uknown TMR function: 0x%02x.\n", |
c66ac9db NB |
4573 | tmr->function); |
4574 | tmr->response = TMR_FUNCTION_REJECTED; | |
4575 | break; | |
4576 | } | |
4577 | ||
4578 | cmd->t_state = TRANSPORT_ISTATE_PROCESSING; | |
e3d6f909 | 4579 | cmd->se_tfo->queue_tm_rsp(cmd); |
c66ac9db | 4580 | |
b7b8bef7 | 4581 | transport_cmd_check_stop_to_fabric(cmd); |
c66ac9db NB |
4582 | return 0; |
4583 | } | |
4584 | ||
c66ac9db NB |
4585 | /* transport_processing_thread(): |
4586 | * | |
4587 | * | |
4588 | */ | |
4589 | static int transport_processing_thread(void *param) | |
4590 | { | |
5951146d | 4591 | int ret; |
c66ac9db NB |
4592 | struct se_cmd *cmd; |
4593 | struct se_device *dev = (struct se_device *) param; | |
c66ac9db | 4594 | |
c66ac9db | 4595 | while (!kthread_should_stop()) { |
e3d6f909 AG |
4596 | ret = wait_event_interruptible(dev->dev_queue_obj.thread_wq, |
4597 | atomic_read(&dev->dev_queue_obj.queue_cnt) || | |
c66ac9db NB |
4598 | kthread_should_stop()); |
4599 | if (ret < 0) | |
4600 | goto out; | |
4601 | ||
c66ac9db NB |
4602 | get_cmd: |
4603 | __transport_execute_tasks(dev); | |
4604 | ||
5951146d AG |
4605 | cmd = transport_get_cmd_from_queue(&dev->dev_queue_obj); |
4606 | if (!cmd) | |
c66ac9db NB |
4607 | continue; |
4608 | ||
5951146d | 4609 | switch (cmd->t_state) { |
680b73c5 CH |
4610 | case TRANSPORT_NEW_CMD: |
4611 | BUG(); | |
4612 | break; | |
c66ac9db | 4613 | case TRANSPORT_NEW_CMD_MAP: |
6708bb27 AG |
4614 | if (!cmd->se_tfo->new_cmd_map) { |
4615 | pr_err("cmd->se_tfo->new_cmd_map is" | |
c66ac9db NB |
4616 | " NULL for TRANSPORT_NEW_CMD_MAP\n"); |
4617 | BUG(); | |
4618 | } | |
e3d6f909 | 4619 | ret = cmd->se_tfo->new_cmd_map(cmd); |
c66ac9db | 4620 | if (ret < 0) { |
03e98c9e | 4621 | transport_generic_request_failure(cmd); |
c66ac9db NB |
4622 | break; |
4623 | } | |
c66ac9db | 4624 | ret = transport_generic_new_cmd(cmd); |
f147abb4 | 4625 | if (ret < 0) { |
03e98c9e NB |
4626 | transport_generic_request_failure(cmd); |
4627 | break; | |
c66ac9db NB |
4628 | } |
4629 | break; | |
4630 | case TRANSPORT_PROCESS_WRITE: | |
4631 | transport_generic_process_write(cmd); | |
4632 | break; | |
c66ac9db NB |
4633 | case TRANSPORT_PROCESS_TMR: |
4634 | transport_generic_do_tmr(cmd); | |
4635 | break; | |
07bde79a | 4636 | case TRANSPORT_COMPLETE_QF_WP: |
e057f533 CH |
4637 | transport_write_pending_qf(cmd); |
4638 | break; | |
4639 | case TRANSPORT_COMPLETE_QF_OK: | |
4640 | transport_complete_qf(cmd); | |
07bde79a | 4641 | break; |
c66ac9db | 4642 | default: |
f2da9dbd CH |
4643 | pr_err("Unknown t_state: %d for ITT: 0x%08x " |
4644 | "i_state: %d on SE LUN: %u\n", | |
4645 | cmd->t_state, | |
e3d6f909 AG |
4646 | cmd->se_tfo->get_task_tag(cmd), |
4647 | cmd->se_tfo->get_cmd_state(cmd), | |
4648 | cmd->se_lun->unpacked_lun); | |
c66ac9db NB |
4649 | BUG(); |
4650 | } | |
4651 | ||
4652 | goto get_cmd; | |
4653 | } | |
4654 | ||
4655 | out: | |
ce8762f6 NB |
4656 | WARN_ON(!list_empty(&dev->state_task_list)); |
4657 | WARN_ON(!list_empty(&dev->dev_queue_obj.qobj_list)); | |
c66ac9db NB |
4658 | dev->process_thread = NULL; |
4659 | return 0; | |
4660 | } |