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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 | ||
29 | #include <linux/version.h> | |
30 | #include <linux/net.h> | |
31 | #include <linux/delay.h> | |
32 | #include <linux/string.h> | |
33 | #include <linux/timer.h> | |
34 | #include <linux/slab.h> | |
35 | #include <linux/blkdev.h> | |
36 | #include <linux/spinlock.h> | |
c66ac9db NB |
37 | #include <linux/kthread.h> |
38 | #include <linux/in.h> | |
39 | #include <linux/cdrom.h> | |
40 | #include <asm/unaligned.h> | |
41 | #include <net/sock.h> | |
42 | #include <net/tcp.h> | |
43 | #include <scsi/scsi.h> | |
44 | #include <scsi/scsi_cmnd.h> | |
e66ecd50 | 45 | #include <scsi/scsi_tcq.h> |
c66ac9db NB |
46 | |
47 | #include <target/target_core_base.h> | |
48 | #include <target/target_core_device.h> | |
49 | #include <target/target_core_tmr.h> | |
50 | #include <target/target_core_tpg.h> | |
51 | #include <target/target_core_transport.h> | |
52 | #include <target/target_core_fabric_ops.h> | |
53 | #include <target/target_core_configfs.h> | |
54 | ||
55 | #include "target_core_alua.h" | |
56 | #include "target_core_hba.h" | |
57 | #include "target_core_pr.h" | |
58 | #include "target_core_scdb.h" | |
59 | #include "target_core_ua.h" | |
60 | ||
e3d6f909 | 61 | static int sub_api_initialized; |
c66ac9db NB |
62 | |
63 | static struct kmem_cache *se_cmd_cache; | |
64 | static struct kmem_cache *se_sess_cache; | |
65 | struct kmem_cache *se_tmr_req_cache; | |
66 | struct kmem_cache *se_ua_cache; | |
c66ac9db NB |
67 | struct kmem_cache *t10_pr_reg_cache; |
68 | struct kmem_cache *t10_alua_lu_gp_cache; | |
69 | struct kmem_cache *t10_alua_lu_gp_mem_cache; | |
70 | struct kmem_cache *t10_alua_tg_pt_gp_cache; | |
71 | struct kmem_cache *t10_alua_tg_pt_gp_mem_cache; | |
72 | ||
73 | /* Used for transport_dev_get_map_*() */ | |
74 | typedef int (*map_func_t)(struct se_task *, u32); | |
75 | ||
76 | static int transport_generic_write_pending(struct se_cmd *); | |
5951146d | 77 | static int transport_processing_thread(void *param); |
c66ac9db NB |
78 | static int __transport_execute_tasks(struct se_device *dev); |
79 | static void transport_complete_task_attr(struct se_cmd *cmd); | |
07bde79a NB |
80 | static int transport_complete_qf(struct se_cmd *cmd); |
81 | static void transport_handle_queue_full(struct se_cmd *cmd, | |
82 | struct se_device *dev, int (*qf_callback)(struct se_cmd *)); | |
c66ac9db NB |
83 | static void transport_direct_request_timeout(struct se_cmd *cmd); |
84 | static void transport_free_dev_tasks(struct se_cmd *cmd); | |
a1d8b49a | 85 | static u32 transport_allocate_tasks(struct se_cmd *cmd, |
ec98f782 | 86 | unsigned long long starting_lba, |
c66ac9db | 87 | enum dma_data_direction data_direction, |
ec98f782 | 88 | struct scatterlist *sgl, unsigned int nents); |
05d1c7c0 | 89 | static int transport_generic_get_mem(struct se_cmd *cmd); |
c66ac9db | 90 | static int transport_generic_remove(struct se_cmd *cmd, |
35462975 | 91 | int session_reinstatement); |
c66ac9db NB |
92 | static void transport_release_fe_cmd(struct se_cmd *cmd); |
93 | static void transport_remove_cmd_from_queue(struct se_cmd *cmd, | |
94 | struct se_queue_obj *qobj); | |
95 | static int transport_set_sense_codes(struct se_cmd *cmd, u8 asc, u8 ascq); | |
96 | static void transport_stop_all_task_timers(struct se_cmd *cmd); | |
97 | ||
e3d6f909 | 98 | int init_se_kmem_caches(void) |
c66ac9db | 99 | { |
c66ac9db NB |
100 | se_cmd_cache = kmem_cache_create("se_cmd_cache", |
101 | sizeof(struct se_cmd), __alignof__(struct se_cmd), 0, NULL); | |
6708bb27 AG |
102 | if (!se_cmd_cache) { |
103 | pr_err("kmem_cache_create for struct se_cmd failed\n"); | |
c66ac9db NB |
104 | goto out; |
105 | } | |
106 | se_tmr_req_cache = kmem_cache_create("se_tmr_cache", | |
107 | sizeof(struct se_tmr_req), __alignof__(struct se_tmr_req), | |
108 | 0, NULL); | |
6708bb27 AG |
109 | if (!se_tmr_req_cache) { |
110 | pr_err("kmem_cache_create() for struct se_tmr_req" | |
c66ac9db NB |
111 | " failed\n"); |
112 | goto out; | |
113 | } | |
114 | se_sess_cache = kmem_cache_create("se_sess_cache", | |
115 | sizeof(struct se_session), __alignof__(struct se_session), | |
116 | 0, NULL); | |
6708bb27 AG |
117 | if (!se_sess_cache) { |
118 | pr_err("kmem_cache_create() for struct se_session" | |
c66ac9db NB |
119 | " failed\n"); |
120 | goto out; | |
121 | } | |
122 | se_ua_cache = kmem_cache_create("se_ua_cache", | |
123 | sizeof(struct se_ua), __alignof__(struct se_ua), | |
124 | 0, NULL); | |
6708bb27 AG |
125 | if (!se_ua_cache) { |
126 | pr_err("kmem_cache_create() for struct se_ua failed\n"); | |
c66ac9db NB |
127 | goto out; |
128 | } | |
c66ac9db NB |
129 | t10_pr_reg_cache = kmem_cache_create("t10_pr_reg_cache", |
130 | sizeof(struct t10_pr_registration), | |
131 | __alignof__(struct t10_pr_registration), 0, NULL); | |
6708bb27 AG |
132 | if (!t10_pr_reg_cache) { |
133 | pr_err("kmem_cache_create() for struct t10_pr_registration" | |
c66ac9db NB |
134 | " failed\n"); |
135 | goto out; | |
136 | } | |
137 | t10_alua_lu_gp_cache = kmem_cache_create("t10_alua_lu_gp_cache", | |
138 | sizeof(struct t10_alua_lu_gp), __alignof__(struct t10_alua_lu_gp), | |
139 | 0, NULL); | |
6708bb27 AG |
140 | if (!t10_alua_lu_gp_cache) { |
141 | pr_err("kmem_cache_create() for t10_alua_lu_gp_cache" | |
c66ac9db NB |
142 | " failed\n"); |
143 | goto out; | |
144 | } | |
145 | t10_alua_lu_gp_mem_cache = kmem_cache_create("t10_alua_lu_gp_mem_cache", | |
146 | sizeof(struct t10_alua_lu_gp_member), | |
147 | __alignof__(struct t10_alua_lu_gp_member), 0, NULL); | |
6708bb27 AG |
148 | if (!t10_alua_lu_gp_mem_cache) { |
149 | pr_err("kmem_cache_create() for t10_alua_lu_gp_mem_" | |
c66ac9db NB |
150 | "cache failed\n"); |
151 | goto out; | |
152 | } | |
153 | t10_alua_tg_pt_gp_cache = kmem_cache_create("t10_alua_tg_pt_gp_cache", | |
154 | sizeof(struct t10_alua_tg_pt_gp), | |
155 | __alignof__(struct t10_alua_tg_pt_gp), 0, NULL); | |
6708bb27 AG |
156 | if (!t10_alua_tg_pt_gp_cache) { |
157 | pr_err("kmem_cache_create() for t10_alua_tg_pt_gp_" | |
c66ac9db NB |
158 | "cache failed\n"); |
159 | goto out; | |
160 | } | |
161 | t10_alua_tg_pt_gp_mem_cache = kmem_cache_create( | |
162 | "t10_alua_tg_pt_gp_mem_cache", | |
163 | sizeof(struct t10_alua_tg_pt_gp_member), | |
164 | __alignof__(struct t10_alua_tg_pt_gp_member), | |
165 | 0, NULL); | |
6708bb27 AG |
166 | if (!t10_alua_tg_pt_gp_mem_cache) { |
167 | pr_err("kmem_cache_create() for t10_alua_tg_pt_gp_" | |
c66ac9db NB |
168 | "mem_t failed\n"); |
169 | goto out; | |
170 | } | |
171 | ||
c66ac9db NB |
172 | return 0; |
173 | out: | |
174 | if (se_cmd_cache) | |
175 | kmem_cache_destroy(se_cmd_cache); | |
176 | if (se_tmr_req_cache) | |
177 | kmem_cache_destroy(se_tmr_req_cache); | |
178 | if (se_sess_cache) | |
179 | kmem_cache_destroy(se_sess_cache); | |
180 | if (se_ua_cache) | |
181 | kmem_cache_destroy(se_ua_cache); | |
c66ac9db NB |
182 | if (t10_pr_reg_cache) |
183 | kmem_cache_destroy(t10_pr_reg_cache); | |
184 | if (t10_alua_lu_gp_cache) | |
185 | kmem_cache_destroy(t10_alua_lu_gp_cache); | |
186 | if (t10_alua_lu_gp_mem_cache) | |
187 | kmem_cache_destroy(t10_alua_lu_gp_mem_cache); | |
188 | if (t10_alua_tg_pt_gp_cache) | |
189 | kmem_cache_destroy(t10_alua_tg_pt_gp_cache); | |
190 | if (t10_alua_tg_pt_gp_mem_cache) | |
191 | kmem_cache_destroy(t10_alua_tg_pt_gp_mem_cache); | |
e3d6f909 | 192 | return -ENOMEM; |
c66ac9db NB |
193 | } |
194 | ||
e3d6f909 | 195 | void release_se_kmem_caches(void) |
c66ac9db | 196 | { |
c66ac9db NB |
197 | kmem_cache_destroy(se_cmd_cache); |
198 | kmem_cache_destroy(se_tmr_req_cache); | |
199 | kmem_cache_destroy(se_sess_cache); | |
200 | kmem_cache_destroy(se_ua_cache); | |
c66ac9db NB |
201 | kmem_cache_destroy(t10_pr_reg_cache); |
202 | kmem_cache_destroy(t10_alua_lu_gp_cache); | |
203 | kmem_cache_destroy(t10_alua_lu_gp_mem_cache); | |
204 | kmem_cache_destroy(t10_alua_tg_pt_gp_cache); | |
205 | kmem_cache_destroy(t10_alua_tg_pt_gp_mem_cache); | |
c66ac9db NB |
206 | } |
207 | ||
e3d6f909 AG |
208 | /* This code ensures unique mib indexes are handed out. */ |
209 | static DEFINE_SPINLOCK(scsi_mib_index_lock); | |
210 | static u32 scsi_mib_index[SCSI_INDEX_TYPE_MAX]; | |
e89d15ee NB |
211 | |
212 | /* | |
213 | * Allocate a new row index for the entry type specified | |
214 | */ | |
215 | u32 scsi_get_new_index(scsi_index_t type) | |
216 | { | |
217 | u32 new_index; | |
218 | ||
e3d6f909 | 219 | BUG_ON((type < 0) || (type >= SCSI_INDEX_TYPE_MAX)); |
e89d15ee | 220 | |
e3d6f909 AG |
221 | spin_lock(&scsi_mib_index_lock); |
222 | new_index = ++scsi_mib_index[type]; | |
223 | spin_unlock(&scsi_mib_index_lock); | |
e89d15ee NB |
224 | |
225 | return new_index; | |
226 | } | |
227 | ||
c66ac9db NB |
228 | void transport_init_queue_obj(struct se_queue_obj *qobj) |
229 | { | |
230 | atomic_set(&qobj->queue_cnt, 0); | |
231 | INIT_LIST_HEAD(&qobj->qobj_list); | |
232 | init_waitqueue_head(&qobj->thread_wq); | |
233 | spin_lock_init(&qobj->cmd_queue_lock); | |
234 | } | |
235 | EXPORT_SYMBOL(transport_init_queue_obj); | |
236 | ||
237 | static int transport_subsystem_reqmods(void) | |
238 | { | |
239 | int ret; | |
240 | ||
241 | ret = request_module("target_core_iblock"); | |
242 | if (ret != 0) | |
6708bb27 | 243 | pr_err("Unable to load target_core_iblock\n"); |
c66ac9db NB |
244 | |
245 | ret = request_module("target_core_file"); | |
246 | if (ret != 0) | |
6708bb27 | 247 | pr_err("Unable to load target_core_file\n"); |
c66ac9db NB |
248 | |
249 | ret = request_module("target_core_pscsi"); | |
250 | if (ret != 0) | |
6708bb27 | 251 | pr_err("Unable to load target_core_pscsi\n"); |
c66ac9db NB |
252 | |
253 | ret = request_module("target_core_stgt"); | |
254 | if (ret != 0) | |
6708bb27 | 255 | pr_err("Unable to load target_core_stgt\n"); |
c66ac9db NB |
256 | |
257 | return 0; | |
258 | } | |
259 | ||
260 | int transport_subsystem_check_init(void) | |
261 | { | |
e3d6f909 AG |
262 | int ret; |
263 | ||
264 | if (sub_api_initialized) | |
c66ac9db NB |
265 | return 0; |
266 | /* | |
267 | * Request the loading of known TCM subsystem plugins.. | |
268 | */ | |
e3d6f909 AG |
269 | ret = transport_subsystem_reqmods(); |
270 | if (ret < 0) | |
271 | return ret; | |
c66ac9db | 272 | |
e3d6f909 | 273 | sub_api_initialized = 1; |
c66ac9db NB |
274 | return 0; |
275 | } | |
276 | ||
277 | struct se_session *transport_init_session(void) | |
278 | { | |
279 | struct se_session *se_sess; | |
280 | ||
281 | se_sess = kmem_cache_zalloc(se_sess_cache, GFP_KERNEL); | |
6708bb27 AG |
282 | if (!se_sess) { |
283 | pr_err("Unable to allocate struct se_session from" | |
c66ac9db NB |
284 | " se_sess_cache\n"); |
285 | return ERR_PTR(-ENOMEM); | |
286 | } | |
287 | INIT_LIST_HEAD(&se_sess->sess_list); | |
288 | INIT_LIST_HEAD(&se_sess->sess_acl_list); | |
c66ac9db NB |
289 | |
290 | return se_sess; | |
291 | } | |
292 | EXPORT_SYMBOL(transport_init_session); | |
293 | ||
294 | /* | |
295 | * Called with spin_lock_bh(&struct se_portal_group->session_lock called. | |
296 | */ | |
297 | void __transport_register_session( | |
298 | struct se_portal_group *se_tpg, | |
299 | struct se_node_acl *se_nacl, | |
300 | struct se_session *se_sess, | |
301 | void *fabric_sess_ptr) | |
302 | { | |
303 | unsigned char buf[PR_REG_ISID_LEN]; | |
304 | ||
305 | se_sess->se_tpg = se_tpg; | |
306 | se_sess->fabric_sess_ptr = fabric_sess_ptr; | |
307 | /* | |
308 | * Used by struct se_node_acl's under ConfigFS to locate active se_session-t | |
309 | * | |
310 | * Only set for struct se_session's that will actually be moving I/O. | |
311 | * eg: *NOT* discovery sessions. | |
312 | */ | |
313 | if (se_nacl) { | |
314 | /* | |
315 | * If the fabric module supports an ISID based TransportID, | |
316 | * save this value in binary from the fabric I_T Nexus now. | |
317 | */ | |
e3d6f909 | 318 | if (se_tpg->se_tpg_tfo->sess_get_initiator_sid != NULL) { |
c66ac9db | 319 | memset(&buf[0], 0, PR_REG_ISID_LEN); |
e3d6f909 | 320 | se_tpg->se_tpg_tfo->sess_get_initiator_sid(se_sess, |
c66ac9db NB |
321 | &buf[0], PR_REG_ISID_LEN); |
322 | se_sess->sess_bin_isid = get_unaligned_be64(&buf[0]); | |
323 | } | |
324 | spin_lock_irq(&se_nacl->nacl_sess_lock); | |
325 | /* | |
326 | * The se_nacl->nacl_sess pointer will be set to the | |
327 | * last active I_T Nexus for each struct se_node_acl. | |
328 | */ | |
329 | se_nacl->nacl_sess = se_sess; | |
330 | ||
331 | list_add_tail(&se_sess->sess_acl_list, | |
332 | &se_nacl->acl_sess_list); | |
333 | spin_unlock_irq(&se_nacl->nacl_sess_lock); | |
334 | } | |
335 | list_add_tail(&se_sess->sess_list, &se_tpg->tpg_sess_list); | |
336 | ||
6708bb27 | 337 | pr_debug("TARGET_CORE[%s]: Registered fabric_sess_ptr: %p\n", |
e3d6f909 | 338 | se_tpg->se_tpg_tfo->get_fabric_name(), se_sess->fabric_sess_ptr); |
c66ac9db NB |
339 | } |
340 | EXPORT_SYMBOL(__transport_register_session); | |
341 | ||
342 | void transport_register_session( | |
343 | struct se_portal_group *se_tpg, | |
344 | struct se_node_acl *se_nacl, | |
345 | struct se_session *se_sess, | |
346 | void *fabric_sess_ptr) | |
347 | { | |
348 | spin_lock_bh(&se_tpg->session_lock); | |
349 | __transport_register_session(se_tpg, se_nacl, se_sess, fabric_sess_ptr); | |
350 | spin_unlock_bh(&se_tpg->session_lock); | |
351 | } | |
352 | EXPORT_SYMBOL(transport_register_session); | |
353 | ||
354 | void transport_deregister_session_configfs(struct se_session *se_sess) | |
355 | { | |
356 | struct se_node_acl *se_nacl; | |
23388864 | 357 | unsigned long flags; |
c66ac9db NB |
358 | /* |
359 | * Used by struct se_node_acl's under ConfigFS to locate active struct se_session | |
360 | */ | |
361 | se_nacl = se_sess->se_node_acl; | |
6708bb27 | 362 | if (se_nacl) { |
23388864 | 363 | spin_lock_irqsave(&se_nacl->nacl_sess_lock, flags); |
c66ac9db NB |
364 | list_del(&se_sess->sess_acl_list); |
365 | /* | |
366 | * If the session list is empty, then clear the pointer. | |
367 | * Otherwise, set the struct se_session pointer from the tail | |
368 | * element of the per struct se_node_acl active session list. | |
369 | */ | |
370 | if (list_empty(&se_nacl->acl_sess_list)) | |
371 | se_nacl->nacl_sess = NULL; | |
372 | else { | |
373 | se_nacl->nacl_sess = container_of( | |
374 | se_nacl->acl_sess_list.prev, | |
375 | struct se_session, sess_acl_list); | |
376 | } | |
23388864 | 377 | spin_unlock_irqrestore(&se_nacl->nacl_sess_lock, flags); |
c66ac9db NB |
378 | } |
379 | } | |
380 | EXPORT_SYMBOL(transport_deregister_session_configfs); | |
381 | ||
382 | void transport_free_session(struct se_session *se_sess) | |
383 | { | |
384 | kmem_cache_free(se_sess_cache, se_sess); | |
385 | } | |
386 | EXPORT_SYMBOL(transport_free_session); | |
387 | ||
388 | void transport_deregister_session(struct se_session *se_sess) | |
389 | { | |
390 | struct se_portal_group *se_tpg = se_sess->se_tpg; | |
391 | struct se_node_acl *se_nacl; | |
392 | ||
6708bb27 | 393 | if (!se_tpg) { |
c66ac9db NB |
394 | transport_free_session(se_sess); |
395 | return; | |
396 | } | |
c66ac9db NB |
397 | |
398 | spin_lock_bh(&se_tpg->session_lock); | |
399 | list_del(&se_sess->sess_list); | |
400 | se_sess->se_tpg = NULL; | |
401 | se_sess->fabric_sess_ptr = NULL; | |
402 | spin_unlock_bh(&se_tpg->session_lock); | |
403 | ||
404 | /* | |
405 | * Determine if we need to do extra work for this initiator node's | |
406 | * struct se_node_acl if it had been previously dynamically generated. | |
407 | */ | |
408 | se_nacl = se_sess->se_node_acl; | |
6708bb27 | 409 | if (se_nacl) { |
c66ac9db NB |
410 | spin_lock_bh(&se_tpg->acl_node_lock); |
411 | if (se_nacl->dynamic_node_acl) { | |
6708bb27 AG |
412 | if (!se_tpg->se_tpg_tfo->tpg_check_demo_mode_cache( |
413 | se_tpg)) { | |
c66ac9db NB |
414 | list_del(&se_nacl->acl_list); |
415 | se_tpg->num_node_acls--; | |
416 | spin_unlock_bh(&se_tpg->acl_node_lock); | |
417 | ||
418 | core_tpg_wait_for_nacl_pr_ref(se_nacl); | |
c66ac9db | 419 | core_free_device_list_for_node(se_nacl, se_tpg); |
e3d6f909 | 420 | se_tpg->se_tpg_tfo->tpg_release_fabric_acl(se_tpg, |
c66ac9db NB |
421 | se_nacl); |
422 | spin_lock_bh(&se_tpg->acl_node_lock); | |
423 | } | |
424 | } | |
425 | spin_unlock_bh(&se_tpg->acl_node_lock); | |
426 | } | |
427 | ||
428 | transport_free_session(se_sess); | |
429 | ||
6708bb27 | 430 | pr_debug("TARGET_CORE[%s]: Deregistered fabric_sess\n", |
e3d6f909 | 431 | se_tpg->se_tpg_tfo->get_fabric_name()); |
c66ac9db NB |
432 | } |
433 | EXPORT_SYMBOL(transport_deregister_session); | |
434 | ||
435 | /* | |
a1d8b49a | 436 | * Called with cmd->t_state_lock held. |
c66ac9db NB |
437 | */ |
438 | static void transport_all_task_dev_remove_state(struct se_cmd *cmd) | |
439 | { | |
440 | struct se_device *dev; | |
441 | struct se_task *task; | |
442 | unsigned long flags; | |
443 | ||
a1d8b49a | 444 | list_for_each_entry(task, &cmd->t_task_list, t_list) { |
c66ac9db | 445 | dev = task->se_dev; |
6708bb27 | 446 | if (!dev) |
c66ac9db NB |
447 | continue; |
448 | ||
449 | if (atomic_read(&task->task_active)) | |
450 | continue; | |
451 | ||
6708bb27 | 452 | if (!atomic_read(&task->task_state_active)) |
c66ac9db NB |
453 | continue; |
454 | ||
455 | spin_lock_irqsave(&dev->execute_task_lock, flags); | |
456 | list_del(&task->t_state_list); | |
6708bb27 AG |
457 | pr_debug("Removed ITT: 0x%08x dev: %p task[%p]\n", |
458 | cmd->se_tfo->get_task_tag(cmd), dev, task); | |
c66ac9db NB |
459 | spin_unlock_irqrestore(&dev->execute_task_lock, flags); |
460 | ||
461 | atomic_set(&task->task_state_active, 0); | |
a1d8b49a | 462 | atomic_dec(&cmd->t_task_cdbs_ex_left); |
c66ac9db NB |
463 | } |
464 | } | |
465 | ||
466 | /* transport_cmd_check_stop(): | |
467 | * | |
468 | * 'transport_off = 1' determines if t_transport_active should be cleared. | |
469 | * 'transport_off = 2' determines if task_dev_state should be removed. | |
470 | * | |
471 | * A non-zero u8 t_state sets cmd->t_state. | |
472 | * Returns 1 when command is stopped, else 0. | |
473 | */ | |
474 | static int transport_cmd_check_stop( | |
475 | struct se_cmd *cmd, | |
476 | int transport_off, | |
477 | u8 t_state) | |
478 | { | |
479 | unsigned long flags; | |
480 | ||
a1d8b49a | 481 | spin_lock_irqsave(&cmd->t_state_lock, flags); |
c66ac9db NB |
482 | /* |
483 | * Determine if IOCTL context caller in requesting the stopping of this | |
484 | * command for LUN shutdown purposes. | |
485 | */ | |
a1d8b49a | 486 | if (atomic_read(&cmd->transport_lun_stop)) { |
6708bb27 | 487 | pr_debug("%s:%d atomic_read(&cmd->transport_lun_stop)" |
c66ac9db | 488 | " == TRUE for ITT: 0x%08x\n", __func__, __LINE__, |
e3d6f909 | 489 | cmd->se_tfo->get_task_tag(cmd)); |
c66ac9db NB |
490 | |
491 | cmd->deferred_t_state = cmd->t_state; | |
492 | cmd->t_state = TRANSPORT_DEFERRED_CMD; | |
a1d8b49a | 493 | atomic_set(&cmd->t_transport_active, 0); |
c66ac9db NB |
494 | if (transport_off == 2) |
495 | transport_all_task_dev_remove_state(cmd); | |
a1d8b49a | 496 | spin_unlock_irqrestore(&cmd->t_state_lock, flags); |
c66ac9db | 497 | |
a1d8b49a | 498 | complete(&cmd->transport_lun_stop_comp); |
c66ac9db NB |
499 | return 1; |
500 | } | |
501 | /* | |
502 | * Determine if frontend context caller is requesting the stopping of | |
e3d6f909 | 503 | * this command for frontend exceptions. |
c66ac9db | 504 | */ |
a1d8b49a | 505 | if (atomic_read(&cmd->t_transport_stop)) { |
6708bb27 | 506 | pr_debug("%s:%d atomic_read(&cmd->t_transport_stop) ==" |
c66ac9db | 507 | " TRUE for ITT: 0x%08x\n", __func__, __LINE__, |
e3d6f909 | 508 | cmd->se_tfo->get_task_tag(cmd)); |
c66ac9db NB |
509 | |
510 | cmd->deferred_t_state = cmd->t_state; | |
511 | cmd->t_state = TRANSPORT_DEFERRED_CMD; | |
512 | if (transport_off == 2) | |
513 | transport_all_task_dev_remove_state(cmd); | |
514 | ||
515 | /* | |
516 | * Clear struct se_cmd->se_lun before the transport_off == 2 handoff | |
517 | * to FE. | |
518 | */ | |
519 | if (transport_off == 2) | |
520 | cmd->se_lun = NULL; | |
a1d8b49a | 521 | spin_unlock_irqrestore(&cmd->t_state_lock, flags); |
c66ac9db | 522 | |
a1d8b49a | 523 | complete(&cmd->t_transport_stop_comp); |
c66ac9db NB |
524 | return 1; |
525 | } | |
526 | if (transport_off) { | |
a1d8b49a | 527 | atomic_set(&cmd->t_transport_active, 0); |
c66ac9db NB |
528 | if (transport_off == 2) { |
529 | transport_all_task_dev_remove_state(cmd); | |
530 | /* | |
531 | * Clear struct se_cmd->se_lun before the transport_off == 2 | |
532 | * handoff to fabric module. | |
533 | */ | |
534 | cmd->se_lun = NULL; | |
535 | /* | |
536 | * Some fabric modules like tcm_loop can release | |
25985edc | 537 | * their internally allocated I/O reference now and |
c66ac9db NB |
538 | * struct se_cmd now. |
539 | */ | |
e3d6f909 | 540 | if (cmd->se_tfo->check_stop_free != NULL) { |
c66ac9db | 541 | spin_unlock_irqrestore( |
a1d8b49a | 542 | &cmd->t_state_lock, flags); |
c66ac9db | 543 | |
e3d6f909 | 544 | cmd->se_tfo->check_stop_free(cmd); |
c66ac9db NB |
545 | return 1; |
546 | } | |
547 | } | |
a1d8b49a | 548 | spin_unlock_irqrestore(&cmd->t_state_lock, flags); |
c66ac9db NB |
549 | |
550 | return 0; | |
551 | } else if (t_state) | |
552 | cmd->t_state = t_state; | |
a1d8b49a | 553 | spin_unlock_irqrestore(&cmd->t_state_lock, flags); |
c66ac9db NB |
554 | |
555 | return 0; | |
556 | } | |
557 | ||
558 | static int transport_cmd_check_stop_to_fabric(struct se_cmd *cmd) | |
559 | { | |
560 | return transport_cmd_check_stop(cmd, 2, 0); | |
561 | } | |
562 | ||
563 | static void transport_lun_remove_cmd(struct se_cmd *cmd) | |
564 | { | |
e3d6f909 | 565 | struct se_lun *lun = cmd->se_lun; |
c66ac9db NB |
566 | unsigned long flags; |
567 | ||
568 | if (!lun) | |
569 | return; | |
570 | ||
a1d8b49a | 571 | spin_lock_irqsave(&cmd->t_state_lock, flags); |
6708bb27 | 572 | if (!atomic_read(&cmd->transport_dev_active)) { |
a1d8b49a | 573 | spin_unlock_irqrestore(&cmd->t_state_lock, flags); |
c66ac9db NB |
574 | goto check_lun; |
575 | } | |
a1d8b49a | 576 | atomic_set(&cmd->transport_dev_active, 0); |
c66ac9db | 577 | transport_all_task_dev_remove_state(cmd); |
a1d8b49a | 578 | spin_unlock_irqrestore(&cmd->t_state_lock, flags); |
c66ac9db | 579 | |
c66ac9db NB |
580 | |
581 | check_lun: | |
582 | spin_lock_irqsave(&lun->lun_cmd_lock, flags); | |
a1d8b49a | 583 | if (atomic_read(&cmd->transport_lun_active)) { |
5951146d | 584 | list_del(&cmd->se_lun_node); |
a1d8b49a | 585 | atomic_set(&cmd->transport_lun_active, 0); |
c66ac9db | 586 | #if 0 |
6708bb27 | 587 | pr_debug("Removed ITT: 0x%08x from LUN LIST[%d]\n" |
e3d6f909 | 588 | cmd->se_tfo->get_task_tag(cmd), lun->unpacked_lun); |
c66ac9db NB |
589 | #endif |
590 | } | |
591 | spin_unlock_irqrestore(&lun->lun_cmd_lock, flags); | |
592 | } | |
593 | ||
594 | void transport_cmd_finish_abort(struct se_cmd *cmd, int remove) | |
595 | { | |
5951146d | 596 | transport_remove_cmd_from_queue(cmd, &cmd->se_dev->dev_queue_obj); |
c66ac9db NB |
597 | transport_lun_remove_cmd(cmd); |
598 | ||
599 | if (transport_cmd_check_stop_to_fabric(cmd)) | |
600 | return; | |
601 | if (remove) | |
35462975 | 602 | transport_generic_remove(cmd, 0); |
c66ac9db NB |
603 | } |
604 | ||
605 | void transport_cmd_finish_abort_tmr(struct se_cmd *cmd) | |
606 | { | |
5951146d | 607 | transport_remove_cmd_from_queue(cmd, &cmd->se_dev->dev_queue_obj); |
c66ac9db NB |
608 | |
609 | if (transport_cmd_check_stop_to_fabric(cmd)) | |
610 | return; | |
611 | ||
35462975 | 612 | transport_generic_remove(cmd, 0); |
c66ac9db NB |
613 | } |
614 | ||
5951146d | 615 | static void transport_add_cmd_to_queue( |
c66ac9db NB |
616 | struct se_cmd *cmd, |
617 | int t_state) | |
618 | { | |
619 | struct se_device *dev = cmd->se_dev; | |
e3d6f909 | 620 | struct se_queue_obj *qobj = &dev->dev_queue_obj; |
c66ac9db NB |
621 | unsigned long flags; |
622 | ||
5951146d | 623 | INIT_LIST_HEAD(&cmd->se_queue_node); |
c66ac9db NB |
624 | |
625 | if (t_state) { | |
a1d8b49a | 626 | spin_lock_irqsave(&cmd->t_state_lock, flags); |
c66ac9db | 627 | cmd->t_state = t_state; |
a1d8b49a AG |
628 | atomic_set(&cmd->t_transport_active, 1); |
629 | spin_unlock_irqrestore(&cmd->t_state_lock, flags); | |
c66ac9db NB |
630 | } |
631 | ||
632 | spin_lock_irqsave(&qobj->cmd_queue_lock, flags); | |
07bde79a NB |
633 | if (cmd->se_cmd_flags & SCF_EMULATE_QUEUE_FULL) { |
634 | cmd->se_cmd_flags &= ~SCF_EMULATE_QUEUE_FULL; | |
635 | list_add(&cmd->se_queue_node, &qobj->qobj_list); | |
636 | } else | |
637 | list_add_tail(&cmd->se_queue_node, &qobj->qobj_list); | |
a1d8b49a | 638 | atomic_inc(&cmd->t_transport_queue_active); |
c66ac9db NB |
639 | spin_unlock_irqrestore(&qobj->cmd_queue_lock, flags); |
640 | ||
641 | atomic_inc(&qobj->queue_cnt); | |
642 | wake_up_interruptible(&qobj->thread_wq); | |
c66ac9db NB |
643 | } |
644 | ||
5951146d AG |
645 | static struct se_cmd * |
646 | transport_get_cmd_from_queue(struct se_queue_obj *qobj) | |
c66ac9db | 647 | { |
5951146d | 648 | struct se_cmd *cmd; |
c66ac9db NB |
649 | unsigned long flags; |
650 | ||
651 | spin_lock_irqsave(&qobj->cmd_queue_lock, flags); | |
652 | if (list_empty(&qobj->qobj_list)) { | |
653 | spin_unlock_irqrestore(&qobj->cmd_queue_lock, flags); | |
654 | return NULL; | |
655 | } | |
5951146d | 656 | cmd = list_first_entry(&qobj->qobj_list, struct se_cmd, se_queue_node); |
c66ac9db | 657 | |
a1d8b49a | 658 | atomic_dec(&cmd->t_transport_queue_active); |
c66ac9db | 659 | |
5951146d | 660 | list_del(&cmd->se_queue_node); |
c66ac9db NB |
661 | atomic_dec(&qobj->queue_cnt); |
662 | spin_unlock_irqrestore(&qobj->cmd_queue_lock, flags); | |
663 | ||
5951146d | 664 | return cmd; |
c66ac9db NB |
665 | } |
666 | ||
667 | static void transport_remove_cmd_from_queue(struct se_cmd *cmd, | |
668 | struct se_queue_obj *qobj) | |
669 | { | |
5951146d | 670 | struct se_cmd *t; |
c66ac9db NB |
671 | unsigned long flags; |
672 | ||
673 | spin_lock_irqsave(&qobj->cmd_queue_lock, flags); | |
6708bb27 | 674 | if (!atomic_read(&cmd->t_transport_queue_active)) { |
c66ac9db NB |
675 | spin_unlock_irqrestore(&qobj->cmd_queue_lock, flags); |
676 | return; | |
677 | } | |
678 | ||
5951146d AG |
679 | list_for_each_entry(t, &qobj->qobj_list, se_queue_node) |
680 | if (t == cmd) { | |
a1d8b49a | 681 | atomic_dec(&cmd->t_transport_queue_active); |
5951146d AG |
682 | atomic_dec(&qobj->queue_cnt); |
683 | list_del(&cmd->se_queue_node); | |
684 | break; | |
685 | } | |
c66ac9db NB |
686 | spin_unlock_irqrestore(&qobj->cmd_queue_lock, flags); |
687 | ||
a1d8b49a | 688 | if (atomic_read(&cmd->t_transport_queue_active)) { |
6708bb27 | 689 | pr_err("ITT: 0x%08x t_transport_queue_active: %d\n", |
e3d6f909 | 690 | cmd->se_tfo->get_task_tag(cmd), |
a1d8b49a | 691 | atomic_read(&cmd->t_transport_queue_active)); |
c66ac9db NB |
692 | } |
693 | } | |
694 | ||
695 | /* | |
696 | * Completion function used by TCM subsystem plugins (such as FILEIO) | |
697 | * for queueing up response from struct se_subsystem_api->do_task() | |
698 | */ | |
699 | void transport_complete_sync_cache(struct se_cmd *cmd, int good) | |
700 | { | |
a1d8b49a | 701 | struct se_task *task = list_entry(cmd->t_task_list.next, |
c66ac9db NB |
702 | struct se_task, t_list); |
703 | ||
704 | if (good) { | |
705 | cmd->scsi_status = SAM_STAT_GOOD; | |
706 | task->task_scsi_status = GOOD; | |
707 | } else { | |
708 | task->task_scsi_status = SAM_STAT_CHECK_CONDITION; | |
709 | task->task_error_status = PYX_TRANSPORT_ILLEGAL_REQUEST; | |
e3d6f909 | 710 | task->task_se_cmd->transport_error_status = |
c66ac9db NB |
711 | PYX_TRANSPORT_ILLEGAL_REQUEST; |
712 | } | |
713 | ||
714 | transport_complete_task(task, good); | |
715 | } | |
716 | EXPORT_SYMBOL(transport_complete_sync_cache); | |
717 | ||
718 | /* transport_complete_task(): | |
719 | * | |
720 | * Called from interrupt and non interrupt context depending | |
721 | * on the transport plugin. | |
722 | */ | |
723 | void transport_complete_task(struct se_task *task, int success) | |
724 | { | |
e3d6f909 | 725 | struct se_cmd *cmd = task->task_se_cmd; |
c66ac9db NB |
726 | struct se_device *dev = task->se_dev; |
727 | int t_state; | |
728 | unsigned long flags; | |
729 | #if 0 | |
6708bb27 | 730 | pr_debug("task: %p CDB: 0x%02x obj_ptr: %p\n", task, |
a1d8b49a | 731 | cmd->t_task_cdb[0], dev); |
c66ac9db | 732 | #endif |
e3d6f909 | 733 | if (dev) |
c66ac9db | 734 | atomic_inc(&dev->depth_left); |
c66ac9db | 735 | |
a1d8b49a | 736 | spin_lock_irqsave(&cmd->t_state_lock, flags); |
c66ac9db NB |
737 | atomic_set(&task->task_active, 0); |
738 | ||
739 | /* | |
740 | * See if any sense data exists, if so set the TASK_SENSE flag. | |
741 | * Also check for any other post completion work that needs to be | |
742 | * done by the plugins. | |
743 | */ | |
744 | if (dev && dev->transport->transport_complete) { | |
745 | if (dev->transport->transport_complete(task) != 0) { | |
746 | cmd->se_cmd_flags |= SCF_TRANSPORT_TASK_SENSE; | |
747 | task->task_sense = 1; | |
748 | success = 1; | |
749 | } | |
750 | } | |
751 | ||
752 | /* | |
753 | * See if we are waiting for outstanding struct se_task | |
754 | * to complete for an exception condition | |
755 | */ | |
756 | if (atomic_read(&task->task_stop)) { | |
757 | /* | |
a1d8b49a | 758 | * Decrement cmd->t_se_count if this task had |
c66ac9db NB |
759 | * previously thrown its timeout exception handler. |
760 | */ | |
761 | if (atomic_read(&task->task_timeout)) { | |
a1d8b49a | 762 | atomic_dec(&cmd->t_se_count); |
c66ac9db NB |
763 | atomic_set(&task->task_timeout, 0); |
764 | } | |
a1d8b49a | 765 | spin_unlock_irqrestore(&cmd->t_state_lock, flags); |
c66ac9db NB |
766 | |
767 | complete(&task->task_stop_comp); | |
768 | return; | |
769 | } | |
770 | /* | |
771 | * If the task's timeout handler has fired, use the t_task_cdbs_timeout | |
772 | * left counter to determine when the struct se_cmd is ready to be queued to | |
773 | * the processing thread. | |
774 | */ | |
775 | if (atomic_read(&task->task_timeout)) { | |
6708bb27 AG |
776 | if (!atomic_dec_and_test( |
777 | &cmd->t_task_cdbs_timeout_left)) { | |
a1d8b49a | 778 | spin_unlock_irqrestore(&cmd->t_state_lock, |
c66ac9db NB |
779 | flags); |
780 | return; | |
781 | } | |
782 | t_state = TRANSPORT_COMPLETE_TIMEOUT; | |
a1d8b49a | 783 | spin_unlock_irqrestore(&cmd->t_state_lock, flags); |
c66ac9db NB |
784 | |
785 | transport_add_cmd_to_queue(cmd, t_state); | |
786 | return; | |
787 | } | |
a1d8b49a | 788 | atomic_dec(&cmd->t_task_cdbs_timeout_left); |
c66ac9db NB |
789 | |
790 | /* | |
791 | * Decrement the outstanding t_task_cdbs_left count. The last | |
792 | * struct se_task from struct se_cmd will complete itself into the | |
793 | * device queue depending upon int success. | |
794 | */ | |
6708bb27 | 795 | if (!atomic_dec_and_test(&cmd->t_task_cdbs_left)) { |
c66ac9db | 796 | if (!success) |
a1d8b49a | 797 | cmd->t_tasks_failed = 1; |
c66ac9db | 798 | |
a1d8b49a | 799 | spin_unlock_irqrestore(&cmd->t_state_lock, flags); |
c66ac9db NB |
800 | return; |
801 | } | |
802 | ||
a1d8b49a | 803 | if (!success || cmd->t_tasks_failed) { |
c66ac9db NB |
804 | t_state = TRANSPORT_COMPLETE_FAILURE; |
805 | if (!task->task_error_status) { | |
806 | task->task_error_status = | |
807 | PYX_TRANSPORT_UNKNOWN_SAM_OPCODE; | |
808 | cmd->transport_error_status = | |
809 | PYX_TRANSPORT_UNKNOWN_SAM_OPCODE; | |
810 | } | |
811 | } else { | |
a1d8b49a | 812 | atomic_set(&cmd->t_transport_complete, 1); |
c66ac9db NB |
813 | t_state = TRANSPORT_COMPLETE_OK; |
814 | } | |
a1d8b49a | 815 | spin_unlock_irqrestore(&cmd->t_state_lock, flags); |
c66ac9db NB |
816 | |
817 | transport_add_cmd_to_queue(cmd, t_state); | |
818 | } | |
819 | EXPORT_SYMBOL(transport_complete_task); | |
820 | ||
821 | /* | |
822 | * Called by transport_add_tasks_from_cmd() once a struct se_cmd's | |
823 | * struct se_task list are ready to be added to the active execution list | |
824 | * struct se_device | |
825 | ||
826 | * Called with se_dev_t->execute_task_lock called. | |
827 | */ | |
828 | static inline int transport_add_task_check_sam_attr( | |
829 | struct se_task *task, | |
830 | struct se_task *task_prev, | |
831 | struct se_device *dev) | |
832 | { | |
833 | /* | |
834 | * No SAM Task attribute emulation enabled, add to tail of | |
835 | * execution queue | |
836 | */ | |
837 | if (dev->dev_task_attr_type != SAM_TASK_ATTR_EMULATED) { | |
838 | list_add_tail(&task->t_execute_list, &dev->execute_task_list); | |
839 | return 0; | |
840 | } | |
841 | /* | |
842 | * HEAD_OF_QUEUE attribute for received CDB, which means | |
843 | * the first task that is associated with a struct se_cmd goes to | |
844 | * head of the struct se_device->execute_task_list, and task_prev | |
845 | * after that for each subsequent task | |
846 | */ | |
e66ecd50 | 847 | if (task->task_se_cmd->sam_task_attr == MSG_HEAD_TAG) { |
c66ac9db NB |
848 | list_add(&task->t_execute_list, |
849 | (task_prev != NULL) ? | |
850 | &task_prev->t_execute_list : | |
851 | &dev->execute_task_list); | |
852 | ||
6708bb27 | 853 | pr_debug("Set HEAD_OF_QUEUE for task CDB: 0x%02x" |
c66ac9db | 854 | " in execution queue\n", |
6708bb27 | 855 | task->task_se_cmd->t_task_cdb[0]); |
c66ac9db NB |
856 | return 1; |
857 | } | |
858 | /* | |
859 | * For ORDERED, SIMPLE or UNTAGGED attribute tasks once they have been | |
860 | * transitioned from Dermant -> Active state, and are added to the end | |
861 | * of the struct se_device->execute_task_list | |
862 | */ | |
863 | list_add_tail(&task->t_execute_list, &dev->execute_task_list); | |
864 | return 0; | |
865 | } | |
866 | ||
867 | /* __transport_add_task_to_execute_queue(): | |
868 | * | |
869 | * Called with se_dev_t->execute_task_lock called. | |
870 | */ | |
871 | static void __transport_add_task_to_execute_queue( | |
872 | struct se_task *task, | |
873 | struct se_task *task_prev, | |
874 | struct se_device *dev) | |
875 | { | |
876 | int head_of_queue; | |
877 | ||
878 | head_of_queue = transport_add_task_check_sam_attr(task, task_prev, dev); | |
879 | atomic_inc(&dev->execute_tasks); | |
880 | ||
881 | if (atomic_read(&task->task_state_active)) | |
882 | return; | |
883 | /* | |
884 | * Determine if this task needs to go to HEAD_OF_QUEUE for the | |
885 | * state list as well. Running with SAM Task Attribute emulation | |
886 | * will always return head_of_queue == 0 here | |
887 | */ | |
888 | if (head_of_queue) | |
889 | list_add(&task->t_state_list, (task_prev) ? | |
890 | &task_prev->t_state_list : | |
891 | &dev->state_task_list); | |
892 | else | |
893 | list_add_tail(&task->t_state_list, &dev->state_task_list); | |
894 | ||
895 | atomic_set(&task->task_state_active, 1); | |
896 | ||
6708bb27 | 897 | pr_debug("Added ITT: 0x%08x task[%p] to dev: %p\n", |
e3d6f909 | 898 | task->task_se_cmd->se_tfo->get_task_tag(task->task_se_cmd), |
c66ac9db NB |
899 | task, dev); |
900 | } | |
901 | ||
902 | static void transport_add_tasks_to_state_queue(struct se_cmd *cmd) | |
903 | { | |
904 | struct se_device *dev; | |
905 | struct se_task *task; | |
906 | unsigned long flags; | |
907 | ||
a1d8b49a AG |
908 | spin_lock_irqsave(&cmd->t_state_lock, flags); |
909 | list_for_each_entry(task, &cmd->t_task_list, t_list) { | |
c66ac9db NB |
910 | dev = task->se_dev; |
911 | ||
912 | if (atomic_read(&task->task_state_active)) | |
913 | continue; | |
914 | ||
915 | spin_lock(&dev->execute_task_lock); | |
916 | list_add_tail(&task->t_state_list, &dev->state_task_list); | |
917 | atomic_set(&task->task_state_active, 1); | |
918 | ||
6708bb27 AG |
919 | pr_debug("Added ITT: 0x%08x task[%p] to dev: %p\n", |
920 | task->task_se_cmd->se_tfo->get_task_tag( | |
c66ac9db NB |
921 | task->task_se_cmd), task, dev); |
922 | ||
923 | spin_unlock(&dev->execute_task_lock); | |
924 | } | |
a1d8b49a | 925 | spin_unlock_irqrestore(&cmd->t_state_lock, flags); |
c66ac9db NB |
926 | } |
927 | ||
928 | static void transport_add_tasks_from_cmd(struct se_cmd *cmd) | |
929 | { | |
5951146d | 930 | struct se_device *dev = cmd->se_dev; |
c66ac9db NB |
931 | struct se_task *task, *task_prev = NULL; |
932 | unsigned long flags; | |
933 | ||
934 | spin_lock_irqsave(&dev->execute_task_lock, flags); | |
a1d8b49a | 935 | list_for_each_entry(task, &cmd->t_task_list, t_list) { |
c66ac9db NB |
936 | if (atomic_read(&task->task_execute_queue)) |
937 | continue; | |
938 | /* | |
939 | * __transport_add_task_to_execute_queue() handles the | |
940 | * SAM Task Attribute emulation if enabled | |
941 | */ | |
942 | __transport_add_task_to_execute_queue(task, task_prev, dev); | |
943 | atomic_set(&task->task_execute_queue, 1); | |
944 | task_prev = task; | |
945 | } | |
946 | spin_unlock_irqrestore(&dev->execute_task_lock, flags); | |
c66ac9db NB |
947 | } |
948 | ||
949 | /* transport_remove_task_from_execute_queue(): | |
950 | * | |
951 | * | |
952 | */ | |
52208ae3 | 953 | void transport_remove_task_from_execute_queue( |
c66ac9db NB |
954 | struct se_task *task, |
955 | struct se_device *dev) | |
956 | { | |
957 | unsigned long flags; | |
958 | ||
af57c3ac NB |
959 | if (atomic_read(&task->task_execute_queue) == 0) { |
960 | dump_stack(); | |
961 | return; | |
962 | } | |
963 | ||
c66ac9db NB |
964 | spin_lock_irqsave(&dev->execute_task_lock, flags); |
965 | list_del(&task->t_execute_list); | |
af57c3ac | 966 | atomic_set(&task->task_execute_queue, 0); |
c66ac9db NB |
967 | atomic_dec(&dev->execute_tasks); |
968 | spin_unlock_irqrestore(&dev->execute_task_lock, flags); | |
969 | } | |
970 | ||
07bde79a NB |
971 | /* |
972 | * Handle QUEUE_FULL / -EAGAIN status | |
973 | */ | |
974 | ||
975 | static void target_qf_do_work(struct work_struct *work) | |
976 | { | |
977 | struct se_device *dev = container_of(work, struct se_device, | |
978 | qf_work_queue); | |
979 | struct se_cmd *cmd, *cmd_tmp; | |
980 | ||
981 | spin_lock_irq(&dev->qf_cmd_lock); | |
982 | list_for_each_entry_safe(cmd, cmd_tmp, &dev->qf_cmd_list, se_qf_node) { | |
983 | ||
984 | list_del(&cmd->se_qf_node); | |
985 | atomic_dec(&dev->dev_qf_count); | |
986 | smp_mb__after_atomic_dec(); | |
987 | spin_unlock_irq(&dev->qf_cmd_lock); | |
988 | ||
6708bb27 | 989 | pr_debug("Processing %s cmd: %p QUEUE_FULL in work queue" |
07bde79a NB |
990 | " context: %s\n", cmd->se_tfo->get_fabric_name(), cmd, |
991 | (cmd->t_state == TRANSPORT_COMPLETE_OK) ? "COMPLETE_OK" : | |
992 | (cmd->t_state == TRANSPORT_COMPLETE_QF_WP) ? "WRITE_PENDING" | |
993 | : "UNKNOWN"); | |
994 | /* | |
995 | * The SCF_EMULATE_QUEUE_FULL flag will be cleared once se_cmd | |
996 | * has been added to head of queue | |
997 | */ | |
998 | transport_add_cmd_to_queue(cmd, cmd->t_state); | |
999 | ||
1000 | spin_lock_irq(&dev->qf_cmd_lock); | |
1001 | } | |
1002 | spin_unlock_irq(&dev->qf_cmd_lock); | |
1003 | } | |
1004 | ||
c66ac9db NB |
1005 | unsigned char *transport_dump_cmd_direction(struct se_cmd *cmd) |
1006 | { | |
1007 | switch (cmd->data_direction) { | |
1008 | case DMA_NONE: | |
1009 | return "NONE"; | |
1010 | case DMA_FROM_DEVICE: | |
1011 | return "READ"; | |
1012 | case DMA_TO_DEVICE: | |
1013 | return "WRITE"; | |
1014 | case DMA_BIDIRECTIONAL: | |
1015 | return "BIDI"; | |
1016 | default: | |
1017 | break; | |
1018 | } | |
1019 | ||
1020 | return "UNKNOWN"; | |
1021 | } | |
1022 | ||
1023 | void transport_dump_dev_state( | |
1024 | struct se_device *dev, | |
1025 | char *b, | |
1026 | int *bl) | |
1027 | { | |
1028 | *bl += sprintf(b + *bl, "Status: "); | |
1029 | switch (dev->dev_status) { | |
1030 | case TRANSPORT_DEVICE_ACTIVATED: | |
1031 | *bl += sprintf(b + *bl, "ACTIVATED"); | |
1032 | break; | |
1033 | case TRANSPORT_DEVICE_DEACTIVATED: | |
1034 | *bl += sprintf(b + *bl, "DEACTIVATED"); | |
1035 | break; | |
1036 | case TRANSPORT_DEVICE_SHUTDOWN: | |
1037 | *bl += sprintf(b + *bl, "SHUTDOWN"); | |
1038 | break; | |
1039 | case TRANSPORT_DEVICE_OFFLINE_ACTIVATED: | |
1040 | case TRANSPORT_DEVICE_OFFLINE_DEACTIVATED: | |
1041 | *bl += sprintf(b + *bl, "OFFLINE"); | |
1042 | break; | |
1043 | default: | |
1044 | *bl += sprintf(b + *bl, "UNKNOWN=%d", dev->dev_status); | |
1045 | break; | |
1046 | } | |
1047 | ||
1048 | *bl += sprintf(b + *bl, " Execute/Left/Max Queue Depth: %d/%d/%d", | |
1049 | atomic_read(&dev->execute_tasks), atomic_read(&dev->depth_left), | |
1050 | dev->queue_depth); | |
1051 | *bl += sprintf(b + *bl, " SectorSize: %u MaxSectors: %u\n", | |
e3d6f909 | 1052 | dev->se_sub_dev->se_dev_attrib.block_size, dev->se_sub_dev->se_dev_attrib.max_sectors); |
c66ac9db NB |
1053 | *bl += sprintf(b + *bl, " "); |
1054 | } | |
1055 | ||
1056 | /* transport_release_all_cmds(): | |
1057 | * | |
1058 | * | |
1059 | */ | |
1060 | static void transport_release_all_cmds(struct se_device *dev) | |
1061 | { | |
5951146d | 1062 | struct se_cmd *cmd, *tcmd; |
c66ac9db NB |
1063 | int bug_out = 0, t_state; |
1064 | unsigned long flags; | |
1065 | ||
e3d6f909 | 1066 | spin_lock_irqsave(&dev->dev_queue_obj.cmd_queue_lock, flags); |
5951146d AG |
1067 | list_for_each_entry_safe(cmd, tcmd, &dev->dev_queue_obj.qobj_list, |
1068 | se_queue_node) { | |
1069 | t_state = cmd->t_state; | |
1070 | list_del(&cmd->se_queue_node); | |
e3d6f909 | 1071 | spin_unlock_irqrestore(&dev->dev_queue_obj.cmd_queue_lock, |
c66ac9db NB |
1072 | flags); |
1073 | ||
6708bb27 | 1074 | pr_err("Releasing ITT: 0x%08x, i_state: %u," |
c66ac9db | 1075 | " t_state: %u directly\n", |
e3d6f909 AG |
1076 | cmd->se_tfo->get_task_tag(cmd), |
1077 | cmd->se_tfo->get_cmd_state(cmd), t_state); | |
c66ac9db NB |
1078 | |
1079 | transport_release_fe_cmd(cmd); | |
1080 | bug_out = 1; | |
1081 | ||
e3d6f909 | 1082 | spin_lock_irqsave(&dev->dev_queue_obj.cmd_queue_lock, flags); |
c66ac9db | 1083 | } |
e3d6f909 | 1084 | spin_unlock_irqrestore(&dev->dev_queue_obj.cmd_queue_lock, flags); |
c66ac9db NB |
1085 | #if 0 |
1086 | if (bug_out) | |
1087 | BUG(); | |
1088 | #endif | |
1089 | } | |
1090 | ||
1091 | void transport_dump_vpd_proto_id( | |
1092 | struct t10_vpd *vpd, | |
1093 | unsigned char *p_buf, | |
1094 | int p_buf_len) | |
1095 | { | |
1096 | unsigned char buf[VPD_TMP_BUF_SIZE]; | |
1097 | int len; | |
1098 | ||
1099 | memset(buf, 0, VPD_TMP_BUF_SIZE); | |
1100 | len = sprintf(buf, "T10 VPD Protocol Identifier: "); | |
1101 | ||
1102 | switch (vpd->protocol_identifier) { | |
1103 | case 0x00: | |
1104 | sprintf(buf+len, "Fibre Channel\n"); | |
1105 | break; | |
1106 | case 0x10: | |
1107 | sprintf(buf+len, "Parallel SCSI\n"); | |
1108 | break; | |
1109 | case 0x20: | |
1110 | sprintf(buf+len, "SSA\n"); | |
1111 | break; | |
1112 | case 0x30: | |
1113 | sprintf(buf+len, "IEEE 1394\n"); | |
1114 | break; | |
1115 | case 0x40: | |
1116 | sprintf(buf+len, "SCSI Remote Direct Memory Access" | |
1117 | " Protocol\n"); | |
1118 | break; | |
1119 | case 0x50: | |
1120 | sprintf(buf+len, "Internet SCSI (iSCSI)\n"); | |
1121 | break; | |
1122 | case 0x60: | |
1123 | sprintf(buf+len, "SAS Serial SCSI Protocol\n"); | |
1124 | break; | |
1125 | case 0x70: | |
1126 | sprintf(buf+len, "Automation/Drive Interface Transport" | |
1127 | " Protocol\n"); | |
1128 | break; | |
1129 | case 0x80: | |
1130 | sprintf(buf+len, "AT Attachment Interface ATA/ATAPI\n"); | |
1131 | break; | |
1132 | default: | |
1133 | sprintf(buf+len, "Unknown 0x%02x\n", | |
1134 | vpd->protocol_identifier); | |
1135 | break; | |
1136 | } | |
1137 | ||
1138 | if (p_buf) | |
1139 | strncpy(p_buf, buf, p_buf_len); | |
1140 | else | |
6708bb27 | 1141 | pr_debug("%s", buf); |
c66ac9db NB |
1142 | } |
1143 | ||
1144 | void | |
1145 | transport_set_vpd_proto_id(struct t10_vpd *vpd, unsigned char *page_83) | |
1146 | { | |
1147 | /* | |
1148 | * Check if the Protocol Identifier Valid (PIV) bit is set.. | |
1149 | * | |
1150 | * from spc3r23.pdf section 7.5.1 | |
1151 | */ | |
1152 | if (page_83[1] & 0x80) { | |
1153 | vpd->protocol_identifier = (page_83[0] & 0xf0); | |
1154 | vpd->protocol_identifier_set = 1; | |
1155 | transport_dump_vpd_proto_id(vpd, NULL, 0); | |
1156 | } | |
1157 | } | |
1158 | EXPORT_SYMBOL(transport_set_vpd_proto_id); | |
1159 | ||
1160 | int transport_dump_vpd_assoc( | |
1161 | struct t10_vpd *vpd, | |
1162 | unsigned char *p_buf, | |
1163 | int p_buf_len) | |
1164 | { | |
1165 | unsigned char buf[VPD_TMP_BUF_SIZE]; | |
e3d6f909 AG |
1166 | int ret = 0; |
1167 | int len; | |
c66ac9db NB |
1168 | |
1169 | memset(buf, 0, VPD_TMP_BUF_SIZE); | |
1170 | len = sprintf(buf, "T10 VPD Identifier Association: "); | |
1171 | ||
1172 | switch (vpd->association) { | |
1173 | case 0x00: | |
1174 | sprintf(buf+len, "addressed logical unit\n"); | |
1175 | break; | |
1176 | case 0x10: | |
1177 | sprintf(buf+len, "target port\n"); | |
1178 | break; | |
1179 | case 0x20: | |
1180 | sprintf(buf+len, "SCSI target device\n"); | |
1181 | break; | |
1182 | default: | |
1183 | sprintf(buf+len, "Unknown 0x%02x\n", vpd->association); | |
e3d6f909 | 1184 | ret = -EINVAL; |
c66ac9db NB |
1185 | break; |
1186 | } | |
1187 | ||
1188 | if (p_buf) | |
1189 | strncpy(p_buf, buf, p_buf_len); | |
1190 | else | |
6708bb27 | 1191 | pr_debug("%s", buf); |
c66ac9db NB |
1192 | |
1193 | return ret; | |
1194 | } | |
1195 | ||
1196 | int transport_set_vpd_assoc(struct t10_vpd *vpd, unsigned char *page_83) | |
1197 | { | |
1198 | /* | |
1199 | * The VPD identification association.. | |
1200 | * | |
1201 | * from spc3r23.pdf Section 7.6.3.1 Table 297 | |
1202 | */ | |
1203 | vpd->association = (page_83[1] & 0x30); | |
1204 | return transport_dump_vpd_assoc(vpd, NULL, 0); | |
1205 | } | |
1206 | EXPORT_SYMBOL(transport_set_vpd_assoc); | |
1207 | ||
1208 | int transport_dump_vpd_ident_type( | |
1209 | struct t10_vpd *vpd, | |
1210 | unsigned char *p_buf, | |
1211 | int p_buf_len) | |
1212 | { | |
1213 | unsigned char buf[VPD_TMP_BUF_SIZE]; | |
e3d6f909 AG |
1214 | int ret = 0; |
1215 | int len; | |
c66ac9db NB |
1216 | |
1217 | memset(buf, 0, VPD_TMP_BUF_SIZE); | |
1218 | len = sprintf(buf, "T10 VPD Identifier Type: "); | |
1219 | ||
1220 | switch (vpd->device_identifier_type) { | |
1221 | case 0x00: | |
1222 | sprintf(buf+len, "Vendor specific\n"); | |
1223 | break; | |
1224 | case 0x01: | |
1225 | sprintf(buf+len, "T10 Vendor ID based\n"); | |
1226 | break; | |
1227 | case 0x02: | |
1228 | sprintf(buf+len, "EUI-64 based\n"); | |
1229 | break; | |
1230 | case 0x03: | |
1231 | sprintf(buf+len, "NAA\n"); | |
1232 | break; | |
1233 | case 0x04: | |
1234 | sprintf(buf+len, "Relative target port identifier\n"); | |
1235 | break; | |
1236 | case 0x08: | |
1237 | sprintf(buf+len, "SCSI name string\n"); | |
1238 | break; | |
1239 | default: | |
1240 | sprintf(buf+len, "Unsupported: 0x%02x\n", | |
1241 | vpd->device_identifier_type); | |
e3d6f909 | 1242 | ret = -EINVAL; |
c66ac9db NB |
1243 | break; |
1244 | } | |
1245 | ||
e3d6f909 AG |
1246 | if (p_buf) { |
1247 | if (p_buf_len < strlen(buf)+1) | |
1248 | return -EINVAL; | |
c66ac9db | 1249 | strncpy(p_buf, buf, p_buf_len); |
e3d6f909 | 1250 | } else { |
6708bb27 | 1251 | pr_debug("%s", buf); |
e3d6f909 | 1252 | } |
c66ac9db NB |
1253 | |
1254 | return ret; | |
1255 | } | |
1256 | ||
1257 | int transport_set_vpd_ident_type(struct t10_vpd *vpd, unsigned char *page_83) | |
1258 | { | |
1259 | /* | |
1260 | * The VPD identifier type.. | |
1261 | * | |
1262 | * from spc3r23.pdf Section 7.6.3.1 Table 298 | |
1263 | */ | |
1264 | vpd->device_identifier_type = (page_83[1] & 0x0f); | |
1265 | return transport_dump_vpd_ident_type(vpd, NULL, 0); | |
1266 | } | |
1267 | EXPORT_SYMBOL(transport_set_vpd_ident_type); | |
1268 | ||
1269 | int transport_dump_vpd_ident( | |
1270 | struct t10_vpd *vpd, | |
1271 | unsigned char *p_buf, | |
1272 | int p_buf_len) | |
1273 | { | |
1274 | unsigned char buf[VPD_TMP_BUF_SIZE]; | |
1275 | int ret = 0; | |
1276 | ||
1277 | memset(buf, 0, VPD_TMP_BUF_SIZE); | |
1278 | ||
1279 | switch (vpd->device_identifier_code_set) { | |
1280 | case 0x01: /* Binary */ | |
1281 | sprintf(buf, "T10 VPD Binary Device Identifier: %s\n", | |
1282 | &vpd->device_identifier[0]); | |
1283 | break; | |
1284 | case 0x02: /* ASCII */ | |
1285 | sprintf(buf, "T10 VPD ASCII Device Identifier: %s\n", | |
1286 | &vpd->device_identifier[0]); | |
1287 | break; | |
1288 | case 0x03: /* UTF-8 */ | |
1289 | sprintf(buf, "T10 VPD UTF-8 Device Identifier: %s\n", | |
1290 | &vpd->device_identifier[0]); | |
1291 | break; | |
1292 | default: | |
1293 | sprintf(buf, "T10 VPD Device Identifier encoding unsupported:" | |
1294 | " 0x%02x", vpd->device_identifier_code_set); | |
e3d6f909 | 1295 | ret = -EINVAL; |
c66ac9db NB |
1296 | break; |
1297 | } | |
1298 | ||
1299 | if (p_buf) | |
1300 | strncpy(p_buf, buf, p_buf_len); | |
1301 | else | |
6708bb27 | 1302 | pr_debug("%s", buf); |
c66ac9db NB |
1303 | |
1304 | return ret; | |
1305 | } | |
1306 | ||
1307 | int | |
1308 | transport_set_vpd_ident(struct t10_vpd *vpd, unsigned char *page_83) | |
1309 | { | |
1310 | static const char hex_str[] = "0123456789abcdef"; | |
1311 | int j = 0, i = 4; /* offset to start of the identifer */ | |
1312 | ||
1313 | /* | |
1314 | * The VPD Code Set (encoding) | |
1315 | * | |
1316 | * from spc3r23.pdf Section 7.6.3.1 Table 296 | |
1317 | */ | |
1318 | vpd->device_identifier_code_set = (page_83[0] & 0x0f); | |
1319 | switch (vpd->device_identifier_code_set) { | |
1320 | case 0x01: /* Binary */ | |
1321 | vpd->device_identifier[j++] = | |
1322 | hex_str[vpd->device_identifier_type]; | |
1323 | while (i < (4 + page_83[3])) { | |
1324 | vpd->device_identifier[j++] = | |
1325 | hex_str[(page_83[i] & 0xf0) >> 4]; | |
1326 | vpd->device_identifier[j++] = | |
1327 | hex_str[page_83[i] & 0x0f]; | |
1328 | i++; | |
1329 | } | |
1330 | break; | |
1331 | case 0x02: /* ASCII */ | |
1332 | case 0x03: /* UTF-8 */ | |
1333 | while (i < (4 + page_83[3])) | |
1334 | vpd->device_identifier[j++] = page_83[i++]; | |
1335 | break; | |
1336 | default: | |
1337 | break; | |
1338 | } | |
1339 | ||
1340 | return transport_dump_vpd_ident(vpd, NULL, 0); | |
1341 | } | |
1342 | EXPORT_SYMBOL(transport_set_vpd_ident); | |
1343 | ||
1344 | static void core_setup_task_attr_emulation(struct se_device *dev) | |
1345 | { | |
1346 | /* | |
1347 | * If this device is from Target_Core_Mod/pSCSI, disable the | |
1348 | * SAM Task Attribute emulation. | |
1349 | * | |
1350 | * This is currently not available in upsream Linux/SCSI Target | |
1351 | * mode code, and is assumed to be disabled while using TCM/pSCSI. | |
1352 | */ | |
e3d6f909 | 1353 | if (dev->transport->transport_type == TRANSPORT_PLUGIN_PHBA_PDEV) { |
c66ac9db NB |
1354 | dev->dev_task_attr_type = SAM_TASK_ATTR_PASSTHROUGH; |
1355 | return; | |
1356 | } | |
1357 | ||
1358 | dev->dev_task_attr_type = SAM_TASK_ATTR_EMULATED; | |
6708bb27 | 1359 | pr_debug("%s: Using SAM_TASK_ATTR_EMULATED for SPC: 0x%02x" |
e3d6f909 AG |
1360 | " device\n", dev->transport->name, |
1361 | dev->transport->get_device_rev(dev)); | |
c66ac9db NB |
1362 | } |
1363 | ||
1364 | static void scsi_dump_inquiry(struct se_device *dev) | |
1365 | { | |
e3d6f909 | 1366 | struct t10_wwn *wwn = &dev->se_sub_dev->t10_wwn; |
c66ac9db NB |
1367 | int i, device_type; |
1368 | /* | |
1369 | * Print Linux/SCSI style INQUIRY formatting to the kernel ring buffer | |
1370 | */ | |
6708bb27 | 1371 | pr_debug(" Vendor: "); |
c66ac9db NB |
1372 | for (i = 0; i < 8; i++) |
1373 | if (wwn->vendor[i] >= 0x20) | |
6708bb27 | 1374 | pr_debug("%c", wwn->vendor[i]); |
c66ac9db | 1375 | else |
6708bb27 | 1376 | pr_debug(" "); |
c66ac9db | 1377 | |
6708bb27 | 1378 | pr_debug(" Model: "); |
c66ac9db NB |
1379 | for (i = 0; i < 16; i++) |
1380 | if (wwn->model[i] >= 0x20) | |
6708bb27 | 1381 | pr_debug("%c", wwn->model[i]); |
c66ac9db | 1382 | else |
6708bb27 | 1383 | pr_debug(" "); |
c66ac9db | 1384 | |
6708bb27 | 1385 | pr_debug(" Revision: "); |
c66ac9db NB |
1386 | for (i = 0; i < 4; i++) |
1387 | if (wwn->revision[i] >= 0x20) | |
6708bb27 | 1388 | pr_debug("%c", wwn->revision[i]); |
c66ac9db | 1389 | else |
6708bb27 | 1390 | pr_debug(" "); |
c66ac9db | 1391 | |
6708bb27 | 1392 | pr_debug("\n"); |
c66ac9db | 1393 | |
e3d6f909 | 1394 | device_type = dev->transport->get_device_type(dev); |
6708bb27 AG |
1395 | pr_debug(" Type: %s ", scsi_device_type(device_type)); |
1396 | pr_debug(" ANSI SCSI revision: %02x\n", | |
e3d6f909 | 1397 | dev->transport->get_device_rev(dev)); |
c66ac9db NB |
1398 | } |
1399 | ||
1400 | struct se_device *transport_add_device_to_core_hba( | |
1401 | struct se_hba *hba, | |
1402 | struct se_subsystem_api *transport, | |
1403 | struct se_subsystem_dev *se_dev, | |
1404 | u32 device_flags, | |
1405 | void *transport_dev, | |
1406 | struct se_dev_limits *dev_limits, | |
1407 | const char *inquiry_prod, | |
1408 | const char *inquiry_rev) | |
1409 | { | |
12a18bdc | 1410 | int force_pt; |
c66ac9db NB |
1411 | struct se_device *dev; |
1412 | ||
1413 | dev = kzalloc(sizeof(struct se_device), GFP_KERNEL); | |
6708bb27 AG |
1414 | if (!dev) { |
1415 | pr_err("Unable to allocate memory for se_dev_t\n"); | |
c66ac9db NB |
1416 | return NULL; |
1417 | } | |
c66ac9db | 1418 | |
e3d6f909 | 1419 | transport_init_queue_obj(&dev->dev_queue_obj); |
c66ac9db NB |
1420 | dev->dev_flags = device_flags; |
1421 | dev->dev_status |= TRANSPORT_DEVICE_DEACTIVATED; | |
5951146d | 1422 | dev->dev_ptr = transport_dev; |
c66ac9db NB |
1423 | dev->se_hba = hba; |
1424 | dev->se_sub_dev = se_dev; | |
1425 | dev->transport = transport; | |
1426 | atomic_set(&dev->active_cmds, 0); | |
1427 | INIT_LIST_HEAD(&dev->dev_list); | |
1428 | INIT_LIST_HEAD(&dev->dev_sep_list); | |
1429 | INIT_LIST_HEAD(&dev->dev_tmr_list); | |
1430 | INIT_LIST_HEAD(&dev->execute_task_list); | |
1431 | INIT_LIST_HEAD(&dev->delayed_cmd_list); | |
1432 | INIT_LIST_HEAD(&dev->ordered_cmd_list); | |
1433 | INIT_LIST_HEAD(&dev->state_task_list); | |
07bde79a | 1434 | INIT_LIST_HEAD(&dev->qf_cmd_list); |
c66ac9db NB |
1435 | spin_lock_init(&dev->execute_task_lock); |
1436 | spin_lock_init(&dev->delayed_cmd_lock); | |
1437 | spin_lock_init(&dev->ordered_cmd_lock); | |
1438 | spin_lock_init(&dev->state_task_lock); | |
1439 | spin_lock_init(&dev->dev_alua_lock); | |
1440 | spin_lock_init(&dev->dev_reservation_lock); | |
1441 | spin_lock_init(&dev->dev_status_lock); | |
1442 | spin_lock_init(&dev->dev_status_thr_lock); | |
1443 | spin_lock_init(&dev->se_port_lock); | |
1444 | spin_lock_init(&dev->se_tmr_lock); | |
07bde79a | 1445 | spin_lock_init(&dev->qf_cmd_lock); |
c66ac9db NB |
1446 | |
1447 | dev->queue_depth = dev_limits->queue_depth; | |
1448 | atomic_set(&dev->depth_left, dev->queue_depth); | |
1449 | atomic_set(&dev->dev_ordered_id, 0); | |
1450 | ||
1451 | se_dev_set_default_attribs(dev, dev_limits); | |
1452 | ||
1453 | dev->dev_index = scsi_get_new_index(SCSI_DEVICE_INDEX); | |
1454 | dev->creation_time = get_jiffies_64(); | |
1455 | spin_lock_init(&dev->stats_lock); | |
1456 | ||
1457 | spin_lock(&hba->device_lock); | |
1458 | list_add_tail(&dev->dev_list, &hba->hba_dev_list); | |
1459 | hba->dev_count++; | |
1460 | spin_unlock(&hba->device_lock); | |
1461 | /* | |
1462 | * Setup the SAM Task Attribute emulation for struct se_device | |
1463 | */ | |
1464 | core_setup_task_attr_emulation(dev); | |
1465 | /* | |
1466 | * Force PR and ALUA passthrough emulation with internal object use. | |
1467 | */ | |
1468 | force_pt = (hba->hba_flags & HBA_FLAGS_INTERNAL_USE); | |
1469 | /* | |
1470 | * Setup the Reservations infrastructure for struct se_device | |
1471 | */ | |
1472 | core_setup_reservations(dev, force_pt); | |
1473 | /* | |
1474 | * Setup the Asymmetric Logical Unit Assignment for struct se_device | |
1475 | */ | |
1476 | if (core_setup_alua(dev, force_pt) < 0) | |
1477 | goto out; | |
1478 | ||
1479 | /* | |
1480 | * Startup the struct se_device processing thread | |
1481 | */ | |
1482 | dev->process_thread = kthread_run(transport_processing_thread, dev, | |
e3d6f909 | 1483 | "LIO_%s", dev->transport->name); |
c66ac9db | 1484 | if (IS_ERR(dev->process_thread)) { |
6708bb27 | 1485 | pr_err("Unable to create kthread: LIO_%s\n", |
e3d6f909 | 1486 | dev->transport->name); |
c66ac9db NB |
1487 | goto out; |
1488 | } | |
07bde79a NB |
1489 | /* |
1490 | * Setup work_queue for QUEUE_FULL | |
1491 | */ | |
1492 | INIT_WORK(&dev->qf_work_queue, target_qf_do_work); | |
c66ac9db NB |
1493 | /* |
1494 | * Preload the initial INQUIRY const values if we are doing | |
1495 | * anything virtual (IBLOCK, FILEIO, RAMDISK), but not for TCM/pSCSI | |
1496 | * passthrough because this is being provided by the backend LLD. | |
1497 | * This is required so that transport_get_inquiry() copies these | |
1498 | * originals once back into DEV_T10_WWN(dev) for the virtual device | |
1499 | * setup. | |
1500 | */ | |
e3d6f909 | 1501 | if (dev->transport->transport_type != TRANSPORT_PLUGIN_PHBA_PDEV) { |
f22c1196 | 1502 | if (!inquiry_prod || !inquiry_rev) { |
6708bb27 | 1503 | pr_err("All non TCM/pSCSI plugins require" |
c66ac9db NB |
1504 | " INQUIRY consts\n"); |
1505 | goto out; | |
1506 | } | |
1507 | ||
e3d6f909 AG |
1508 | strncpy(&dev->se_sub_dev->t10_wwn.vendor[0], "LIO-ORG", 8); |
1509 | strncpy(&dev->se_sub_dev->t10_wwn.model[0], inquiry_prod, 16); | |
1510 | strncpy(&dev->se_sub_dev->t10_wwn.revision[0], inquiry_rev, 4); | |
c66ac9db NB |
1511 | } |
1512 | scsi_dump_inquiry(dev); | |
1513 | ||
12a18bdc | 1514 | return dev; |
c66ac9db | 1515 | out: |
c66ac9db NB |
1516 | kthread_stop(dev->process_thread); |
1517 | ||
1518 | spin_lock(&hba->device_lock); | |
1519 | list_del(&dev->dev_list); | |
1520 | hba->dev_count--; | |
1521 | spin_unlock(&hba->device_lock); | |
1522 | ||
1523 | se_release_vpd_for_dev(dev); | |
1524 | ||
c66ac9db NB |
1525 | kfree(dev); |
1526 | ||
1527 | return NULL; | |
1528 | } | |
1529 | EXPORT_SYMBOL(transport_add_device_to_core_hba); | |
1530 | ||
1531 | /* transport_generic_prepare_cdb(): | |
1532 | * | |
1533 | * Since the Initiator sees iSCSI devices as LUNs, the SCSI CDB will | |
1534 | * contain the iSCSI LUN in bits 7-5 of byte 1 as per SAM-2. | |
1535 | * The point of this is since we are mapping iSCSI LUNs to | |
1536 | * SCSI Target IDs having a non-zero LUN in the CDB will throw the | |
1537 | * devices and HBAs for a loop. | |
1538 | */ | |
1539 | static inline void transport_generic_prepare_cdb( | |
1540 | unsigned char *cdb) | |
1541 | { | |
1542 | switch (cdb[0]) { | |
1543 | case READ_10: /* SBC - RDProtect */ | |
1544 | case READ_12: /* SBC - RDProtect */ | |
1545 | case READ_16: /* SBC - RDProtect */ | |
1546 | case SEND_DIAGNOSTIC: /* SPC - SELF-TEST Code */ | |
1547 | case VERIFY: /* SBC - VRProtect */ | |
1548 | case VERIFY_16: /* SBC - VRProtect */ | |
1549 | case WRITE_VERIFY: /* SBC - VRProtect */ | |
1550 | case WRITE_VERIFY_12: /* SBC - VRProtect */ | |
1551 | break; | |
1552 | default: | |
1553 | cdb[1] &= 0x1f; /* clear logical unit number */ | |
1554 | break; | |
1555 | } | |
1556 | } | |
1557 | ||
1558 | static struct se_task * | |
1559 | transport_generic_get_task(struct se_cmd *cmd, | |
1560 | enum dma_data_direction data_direction) | |
1561 | { | |
1562 | struct se_task *task; | |
5951146d | 1563 | struct se_device *dev = cmd->se_dev; |
c66ac9db | 1564 | |
6708bb27 | 1565 | task = dev->transport->alloc_task(cmd->t_task_cdb); |
c66ac9db | 1566 | if (!task) { |
6708bb27 | 1567 | pr_err("Unable to allocate struct se_task\n"); |
c66ac9db NB |
1568 | return NULL; |
1569 | } | |
1570 | ||
1571 | INIT_LIST_HEAD(&task->t_list); | |
1572 | INIT_LIST_HEAD(&task->t_execute_list); | |
1573 | INIT_LIST_HEAD(&task->t_state_list); | |
1574 | init_completion(&task->task_stop_comp); | |
c66ac9db NB |
1575 | task->task_se_cmd = cmd; |
1576 | task->se_dev = dev; | |
1577 | task->task_data_direction = data_direction; | |
1578 | ||
c66ac9db NB |
1579 | return task; |
1580 | } | |
1581 | ||
1582 | static int transport_generic_cmd_sequencer(struct se_cmd *, unsigned char *); | |
1583 | ||
c66ac9db NB |
1584 | /* |
1585 | * Used by fabric modules containing a local struct se_cmd within their | |
1586 | * fabric dependent per I/O descriptor. | |
1587 | */ | |
1588 | void transport_init_se_cmd( | |
1589 | struct se_cmd *cmd, | |
1590 | struct target_core_fabric_ops *tfo, | |
1591 | struct se_session *se_sess, | |
1592 | u32 data_length, | |
1593 | int data_direction, | |
1594 | int task_attr, | |
1595 | unsigned char *sense_buffer) | |
1596 | { | |
5951146d AG |
1597 | INIT_LIST_HEAD(&cmd->se_lun_node); |
1598 | INIT_LIST_HEAD(&cmd->se_delayed_node); | |
1599 | INIT_LIST_HEAD(&cmd->se_ordered_node); | |
07bde79a | 1600 | INIT_LIST_HEAD(&cmd->se_qf_node); |
c66ac9db | 1601 | |
a1d8b49a AG |
1602 | INIT_LIST_HEAD(&cmd->t_task_list); |
1603 | init_completion(&cmd->transport_lun_fe_stop_comp); | |
1604 | init_completion(&cmd->transport_lun_stop_comp); | |
1605 | init_completion(&cmd->t_transport_stop_comp); | |
1606 | spin_lock_init(&cmd->t_state_lock); | |
1607 | atomic_set(&cmd->transport_dev_active, 1); | |
c66ac9db NB |
1608 | |
1609 | cmd->se_tfo = tfo; | |
1610 | cmd->se_sess = se_sess; | |
1611 | cmd->data_length = data_length; | |
1612 | cmd->data_direction = data_direction; | |
1613 | cmd->sam_task_attr = task_attr; | |
1614 | cmd->sense_buffer = sense_buffer; | |
1615 | } | |
1616 | EXPORT_SYMBOL(transport_init_se_cmd); | |
1617 | ||
1618 | static int transport_check_alloc_task_attr(struct se_cmd *cmd) | |
1619 | { | |
1620 | /* | |
1621 | * Check if SAM Task Attribute emulation is enabled for this | |
1622 | * struct se_device storage object | |
1623 | */ | |
5951146d | 1624 | if (cmd->se_dev->dev_task_attr_type != SAM_TASK_ATTR_EMULATED) |
c66ac9db NB |
1625 | return 0; |
1626 | ||
e66ecd50 | 1627 | if (cmd->sam_task_attr == MSG_ACA_TAG) { |
6708bb27 | 1628 | pr_debug("SAM Task Attribute ACA" |
c66ac9db | 1629 | " emulation is not supported\n"); |
e3d6f909 | 1630 | return -EINVAL; |
c66ac9db NB |
1631 | } |
1632 | /* | |
1633 | * Used to determine when ORDERED commands should go from | |
1634 | * Dormant to Active status. | |
1635 | */ | |
5951146d | 1636 | cmd->se_ordered_id = atomic_inc_return(&cmd->se_dev->dev_ordered_id); |
c66ac9db | 1637 | smp_mb__after_atomic_inc(); |
6708bb27 | 1638 | pr_debug("Allocated se_ordered_id: %u for Task Attr: 0x%02x on %s\n", |
c66ac9db | 1639 | cmd->se_ordered_id, cmd->sam_task_attr, |
6708bb27 | 1640 | cmd->se_dev->transport->name); |
c66ac9db NB |
1641 | return 0; |
1642 | } | |
1643 | ||
1644 | void transport_free_se_cmd( | |
1645 | struct se_cmd *se_cmd) | |
1646 | { | |
1647 | if (se_cmd->se_tmr_req) | |
1648 | core_tmr_release_req(se_cmd->se_tmr_req); | |
1649 | /* | |
1650 | * Check and free any extended CDB buffer that was allocated | |
1651 | */ | |
a1d8b49a AG |
1652 | if (se_cmd->t_task_cdb != se_cmd->__t_task_cdb) |
1653 | kfree(se_cmd->t_task_cdb); | |
c66ac9db NB |
1654 | } |
1655 | EXPORT_SYMBOL(transport_free_se_cmd); | |
1656 | ||
1657 | static void transport_generic_wait_for_tasks(struct se_cmd *, int, int); | |
1658 | ||
1659 | /* transport_generic_allocate_tasks(): | |
1660 | * | |
1661 | * Called from fabric RX Thread. | |
1662 | */ | |
1663 | int transport_generic_allocate_tasks( | |
1664 | struct se_cmd *cmd, | |
1665 | unsigned char *cdb) | |
1666 | { | |
1667 | int ret; | |
1668 | ||
1669 | transport_generic_prepare_cdb(cdb); | |
1670 | ||
1671 | /* | |
1672 | * This is needed for early exceptions. | |
1673 | */ | |
1674 | cmd->transport_wait_for_tasks = &transport_generic_wait_for_tasks; | |
1675 | ||
c66ac9db NB |
1676 | /* |
1677 | * Ensure that the received CDB is less than the max (252 + 8) bytes | |
1678 | * for VARIABLE_LENGTH_CMD | |
1679 | */ | |
1680 | if (scsi_command_size(cdb) > SCSI_MAX_VARLEN_CDB_SIZE) { | |
6708bb27 | 1681 | pr_err("Received SCSI CDB with command_size: %d that" |
c66ac9db NB |
1682 | " exceeds SCSI_MAX_VARLEN_CDB_SIZE: %d\n", |
1683 | scsi_command_size(cdb), SCSI_MAX_VARLEN_CDB_SIZE); | |
e3d6f909 | 1684 | return -EINVAL; |
c66ac9db NB |
1685 | } |
1686 | /* | |
1687 | * If the received CDB is larger than TCM_MAX_COMMAND_SIZE, | |
1688 | * allocate the additional extended CDB buffer now.. Otherwise | |
1689 | * setup the pointer from __t_task_cdb to t_task_cdb. | |
1690 | */ | |
a1d8b49a AG |
1691 | if (scsi_command_size(cdb) > sizeof(cmd->__t_task_cdb)) { |
1692 | cmd->t_task_cdb = kzalloc(scsi_command_size(cdb), | |
c66ac9db | 1693 | GFP_KERNEL); |
6708bb27 AG |
1694 | if (!cmd->t_task_cdb) { |
1695 | pr_err("Unable to allocate cmd->t_task_cdb" | |
a1d8b49a | 1696 | " %u > sizeof(cmd->__t_task_cdb): %lu ops\n", |
c66ac9db | 1697 | scsi_command_size(cdb), |
a1d8b49a | 1698 | (unsigned long)sizeof(cmd->__t_task_cdb)); |
e3d6f909 | 1699 | return -ENOMEM; |
c66ac9db NB |
1700 | } |
1701 | } else | |
a1d8b49a | 1702 | cmd->t_task_cdb = &cmd->__t_task_cdb[0]; |
c66ac9db | 1703 | /* |
a1d8b49a | 1704 | * Copy the original CDB into cmd-> |
c66ac9db | 1705 | */ |
a1d8b49a | 1706 | memcpy(cmd->t_task_cdb, cdb, scsi_command_size(cdb)); |
c66ac9db NB |
1707 | /* |
1708 | * Setup the received CDB based on SCSI defined opcodes and | |
1709 | * perform unit attention, persistent reservations and ALUA | |
a1d8b49a | 1710 | * checks for virtual device backends. The cmd->t_task_cdb |
c66ac9db NB |
1711 | * pointer is expected to be setup before we reach this point. |
1712 | */ | |
1713 | ret = transport_generic_cmd_sequencer(cmd, cdb); | |
1714 | if (ret < 0) | |
1715 | return ret; | |
1716 | /* | |
1717 | * Check for SAM Task Attribute Emulation | |
1718 | */ | |
1719 | if (transport_check_alloc_task_attr(cmd) < 0) { | |
1720 | cmd->se_cmd_flags |= SCF_SCSI_CDB_EXCEPTION; | |
1721 | cmd->scsi_sense_reason = TCM_INVALID_CDB_FIELD; | |
5951146d | 1722 | return -EINVAL; |
c66ac9db NB |
1723 | } |
1724 | spin_lock(&cmd->se_lun->lun_sep_lock); | |
1725 | if (cmd->se_lun->lun_sep) | |
1726 | cmd->se_lun->lun_sep->sep_stats.cmd_pdus++; | |
1727 | spin_unlock(&cmd->se_lun->lun_sep_lock); | |
1728 | return 0; | |
1729 | } | |
1730 | EXPORT_SYMBOL(transport_generic_allocate_tasks); | |
1731 | ||
1732 | /* | |
1733 | * Used by fabric module frontends not defining a TFO->new_cmd_map() | |
1734 | * to queue up a newly setup se_cmd w/ TRANSPORT_NEW_CMD statis | |
1735 | */ | |
1736 | int transport_generic_handle_cdb( | |
1737 | struct se_cmd *cmd) | |
1738 | { | |
e3d6f909 | 1739 | if (!cmd->se_lun) { |
c66ac9db | 1740 | dump_stack(); |
6708bb27 | 1741 | pr_err("cmd->se_lun is NULL\n"); |
e3d6f909 | 1742 | return -EINVAL; |
c66ac9db | 1743 | } |
695434e1 | 1744 | |
c66ac9db NB |
1745 | transport_add_cmd_to_queue(cmd, TRANSPORT_NEW_CMD); |
1746 | return 0; | |
1747 | } | |
1748 | EXPORT_SYMBOL(transport_generic_handle_cdb); | |
1749 | ||
695434e1 NB |
1750 | /* |
1751 | * Used by fabric module frontends to queue tasks directly. | |
1752 | * Many only be used from process context only | |
1753 | */ | |
1754 | int transport_handle_cdb_direct( | |
1755 | struct se_cmd *cmd) | |
1756 | { | |
1757 | if (!cmd->se_lun) { | |
1758 | dump_stack(); | |
6708bb27 | 1759 | pr_err("cmd->se_lun is NULL\n"); |
695434e1 NB |
1760 | return -EINVAL; |
1761 | } | |
1762 | if (in_interrupt()) { | |
1763 | dump_stack(); | |
6708bb27 | 1764 | pr_err("transport_generic_handle_cdb cannot be called" |
695434e1 NB |
1765 | " from interrupt context\n"); |
1766 | return -EINVAL; | |
1767 | } | |
1768 | ||
1769 | return transport_generic_new_cmd(cmd); | |
1770 | } | |
1771 | EXPORT_SYMBOL(transport_handle_cdb_direct); | |
1772 | ||
c66ac9db NB |
1773 | /* |
1774 | * Used by fabric module frontends defining a TFO->new_cmd_map() caller | |
1775 | * to queue up a newly setup se_cmd w/ TRANSPORT_NEW_CMD_MAP in order to | |
1776 | * complete setup in TCM process context w/ TFO->new_cmd_map(). | |
1777 | */ | |
1778 | int transport_generic_handle_cdb_map( | |
1779 | struct se_cmd *cmd) | |
1780 | { | |
e3d6f909 | 1781 | if (!cmd->se_lun) { |
c66ac9db | 1782 | dump_stack(); |
6708bb27 | 1783 | pr_err("cmd->se_lun is NULL\n"); |
e3d6f909 | 1784 | return -EINVAL; |
c66ac9db NB |
1785 | } |
1786 | ||
1787 | transport_add_cmd_to_queue(cmd, TRANSPORT_NEW_CMD_MAP); | |
1788 | return 0; | |
1789 | } | |
1790 | EXPORT_SYMBOL(transport_generic_handle_cdb_map); | |
1791 | ||
1792 | /* transport_generic_handle_data(): | |
1793 | * | |
1794 | * | |
1795 | */ | |
1796 | int transport_generic_handle_data( | |
1797 | struct se_cmd *cmd) | |
1798 | { | |
1799 | /* | |
1800 | * For the software fabric case, then we assume the nexus is being | |
1801 | * failed/shutdown when signals are pending from the kthread context | |
1802 | * caller, so we return a failure. For the HW target mode case running | |
1803 | * in interrupt code, the signal_pending() check is skipped. | |
1804 | */ | |
1805 | if (!in_interrupt() && signal_pending(current)) | |
e3d6f909 | 1806 | return -EPERM; |
c66ac9db NB |
1807 | /* |
1808 | * If the received CDB has aleady been ABORTED by the generic | |
1809 | * target engine, we now call transport_check_aborted_status() | |
1810 | * to queue any delated TASK_ABORTED status for the received CDB to the | |
25985edc | 1811 | * fabric module as we are expecting no further incoming DATA OUT |
c66ac9db NB |
1812 | * sequences at this point. |
1813 | */ | |
1814 | if (transport_check_aborted_status(cmd, 1) != 0) | |
1815 | return 0; | |
1816 | ||
1817 | transport_add_cmd_to_queue(cmd, TRANSPORT_PROCESS_WRITE); | |
1818 | return 0; | |
1819 | } | |
1820 | EXPORT_SYMBOL(transport_generic_handle_data); | |
1821 | ||
1822 | /* transport_generic_handle_tmr(): | |
1823 | * | |
1824 | * | |
1825 | */ | |
1826 | int transport_generic_handle_tmr( | |
1827 | struct se_cmd *cmd) | |
1828 | { | |
1829 | /* | |
1830 | * This is needed for early exceptions. | |
1831 | */ | |
1832 | cmd->transport_wait_for_tasks = &transport_generic_wait_for_tasks; | |
c66ac9db NB |
1833 | |
1834 | transport_add_cmd_to_queue(cmd, TRANSPORT_PROCESS_TMR); | |
1835 | return 0; | |
1836 | } | |
1837 | EXPORT_SYMBOL(transport_generic_handle_tmr); | |
1838 | ||
f4366772 NB |
1839 | void transport_generic_free_cmd_intr( |
1840 | struct se_cmd *cmd) | |
1841 | { | |
1842 | transport_add_cmd_to_queue(cmd, TRANSPORT_FREE_CMD_INTR); | |
1843 | } | |
1844 | EXPORT_SYMBOL(transport_generic_free_cmd_intr); | |
1845 | ||
c66ac9db NB |
1846 | static int transport_stop_tasks_for_cmd(struct se_cmd *cmd) |
1847 | { | |
1848 | struct se_task *task, *task_tmp; | |
1849 | unsigned long flags; | |
1850 | int ret = 0; | |
1851 | ||
6708bb27 | 1852 | pr_debug("ITT[0x%08x] - Stopping tasks\n", |
e3d6f909 | 1853 | cmd->se_tfo->get_task_tag(cmd)); |
c66ac9db NB |
1854 | |
1855 | /* | |
1856 | * No tasks remain in the execution queue | |
1857 | */ | |
a1d8b49a | 1858 | spin_lock_irqsave(&cmd->t_state_lock, flags); |
c66ac9db | 1859 | list_for_each_entry_safe(task, task_tmp, |
a1d8b49a | 1860 | &cmd->t_task_list, t_list) { |
6708bb27 | 1861 | pr_debug("task_no[%d] - Processing task %p\n", |
c66ac9db NB |
1862 | task->task_no, task); |
1863 | /* | |
1864 | * If the struct se_task has not been sent and is not active, | |
1865 | * remove the struct se_task from the execution queue. | |
1866 | */ | |
1867 | if (!atomic_read(&task->task_sent) && | |
1868 | !atomic_read(&task->task_active)) { | |
a1d8b49a | 1869 | spin_unlock_irqrestore(&cmd->t_state_lock, |
c66ac9db NB |
1870 | flags); |
1871 | transport_remove_task_from_execute_queue(task, | |
1872 | task->se_dev); | |
1873 | ||
6708bb27 | 1874 | pr_debug("task_no[%d] - Removed from execute queue\n", |
c66ac9db | 1875 | task->task_no); |
a1d8b49a | 1876 | spin_lock_irqsave(&cmd->t_state_lock, flags); |
c66ac9db NB |
1877 | continue; |
1878 | } | |
1879 | ||
1880 | /* | |
1881 | * If the struct se_task is active, sleep until it is returned | |
1882 | * from the plugin. | |
1883 | */ | |
1884 | if (atomic_read(&task->task_active)) { | |
1885 | atomic_set(&task->task_stop, 1); | |
a1d8b49a | 1886 | spin_unlock_irqrestore(&cmd->t_state_lock, |
c66ac9db NB |
1887 | flags); |
1888 | ||
6708bb27 | 1889 | pr_debug("task_no[%d] - Waiting to complete\n", |
c66ac9db NB |
1890 | task->task_no); |
1891 | wait_for_completion(&task->task_stop_comp); | |
6708bb27 | 1892 | pr_debug("task_no[%d] - Stopped successfully\n", |
c66ac9db NB |
1893 | task->task_no); |
1894 | ||
a1d8b49a AG |
1895 | spin_lock_irqsave(&cmd->t_state_lock, flags); |
1896 | atomic_dec(&cmd->t_task_cdbs_left); | |
c66ac9db NB |
1897 | |
1898 | atomic_set(&task->task_active, 0); | |
1899 | atomic_set(&task->task_stop, 0); | |
1900 | } else { | |
6708bb27 | 1901 | pr_debug("task_no[%d] - Did nothing\n", task->task_no); |
c66ac9db NB |
1902 | ret++; |
1903 | } | |
1904 | ||
1905 | __transport_stop_task_timer(task, &flags); | |
1906 | } | |
a1d8b49a | 1907 | spin_unlock_irqrestore(&cmd->t_state_lock, flags); |
c66ac9db NB |
1908 | |
1909 | return ret; | |
1910 | } | |
1911 | ||
c66ac9db NB |
1912 | /* |
1913 | * Handle SAM-esque emulation for generic transport request failures. | |
1914 | */ | |
1915 | static void transport_generic_request_failure( | |
1916 | struct se_cmd *cmd, | |
1917 | struct se_device *dev, | |
1918 | int complete, | |
1919 | int sc) | |
1920 | { | |
07bde79a NB |
1921 | int ret = 0; |
1922 | ||
6708bb27 | 1923 | pr_debug("-----[ Storage Engine Exception for cmd: %p ITT: 0x%08x" |
e3d6f909 | 1924 | " CDB: 0x%02x\n", cmd, cmd->se_tfo->get_task_tag(cmd), |
a1d8b49a | 1925 | cmd->t_task_cdb[0]); |
6708bb27 | 1926 | pr_debug("-----[ i_state: %d t_state/def_t_state:" |
c66ac9db | 1927 | " %d/%d transport_error_status: %d\n", |
e3d6f909 | 1928 | cmd->se_tfo->get_cmd_state(cmd), |
c66ac9db NB |
1929 | cmd->t_state, cmd->deferred_t_state, |
1930 | cmd->transport_error_status); | |
6708bb27 | 1931 | pr_debug("-----[ t_tasks: %d t_task_cdbs_left: %d" |
c66ac9db NB |
1932 | " t_task_cdbs_sent: %d t_task_cdbs_ex_left: %d --" |
1933 | " t_transport_active: %d t_transport_stop: %d" | |
6708bb27 | 1934 | " t_transport_sent: %d\n", cmd->t_task_list_num, |
a1d8b49a AG |
1935 | atomic_read(&cmd->t_task_cdbs_left), |
1936 | atomic_read(&cmd->t_task_cdbs_sent), | |
1937 | atomic_read(&cmd->t_task_cdbs_ex_left), | |
1938 | atomic_read(&cmd->t_transport_active), | |
1939 | atomic_read(&cmd->t_transport_stop), | |
1940 | atomic_read(&cmd->t_transport_sent)); | |
c66ac9db NB |
1941 | |
1942 | transport_stop_all_task_timers(cmd); | |
1943 | ||
1944 | if (dev) | |
e3d6f909 | 1945 | atomic_inc(&dev->depth_left); |
c66ac9db NB |
1946 | /* |
1947 | * For SAM Task Attribute emulation for failed struct se_cmd | |
1948 | */ | |
1949 | if (cmd->se_dev->dev_task_attr_type == SAM_TASK_ATTR_EMULATED) | |
1950 | transport_complete_task_attr(cmd); | |
1951 | ||
1952 | if (complete) { | |
1953 | transport_direct_request_timeout(cmd); | |
1954 | cmd->transport_error_status = PYX_TRANSPORT_LU_COMM_FAILURE; | |
1955 | } | |
1956 | ||
1957 | switch (cmd->transport_error_status) { | |
1958 | case PYX_TRANSPORT_UNKNOWN_SAM_OPCODE: | |
1959 | cmd->scsi_sense_reason = TCM_UNSUPPORTED_SCSI_OPCODE; | |
1960 | break; | |
1961 | case PYX_TRANSPORT_REQ_TOO_MANY_SECTORS: | |
1962 | cmd->scsi_sense_reason = TCM_SECTOR_COUNT_TOO_MANY; | |
1963 | break; | |
1964 | case PYX_TRANSPORT_INVALID_CDB_FIELD: | |
1965 | cmd->scsi_sense_reason = TCM_INVALID_CDB_FIELD; | |
1966 | break; | |
1967 | case PYX_TRANSPORT_INVALID_PARAMETER_LIST: | |
1968 | cmd->scsi_sense_reason = TCM_INVALID_PARAMETER_LIST; | |
1969 | break; | |
1970 | case PYX_TRANSPORT_OUT_OF_MEMORY_RESOURCES: | |
1971 | if (!sc) | |
1972 | transport_new_cmd_failure(cmd); | |
1973 | /* | |
1974 | * Currently for PYX_TRANSPORT_OUT_OF_MEMORY_RESOURCES, | |
1975 | * we force this session to fall back to session | |
1976 | * recovery. | |
1977 | */ | |
e3d6f909 AG |
1978 | cmd->se_tfo->fall_back_to_erl0(cmd->se_sess); |
1979 | cmd->se_tfo->stop_session(cmd->se_sess, 0, 0); | |
c66ac9db NB |
1980 | |
1981 | goto check_stop; | |
1982 | case PYX_TRANSPORT_LU_COMM_FAILURE: | |
1983 | case PYX_TRANSPORT_ILLEGAL_REQUEST: | |
1984 | cmd->scsi_sense_reason = TCM_LOGICAL_UNIT_COMMUNICATION_FAILURE; | |
1985 | break; | |
1986 | case PYX_TRANSPORT_UNKNOWN_MODE_PAGE: | |
1987 | cmd->scsi_sense_reason = TCM_UNKNOWN_MODE_PAGE; | |
1988 | break; | |
1989 | case PYX_TRANSPORT_WRITE_PROTECTED: | |
1990 | cmd->scsi_sense_reason = TCM_WRITE_PROTECTED; | |
1991 | break; | |
1992 | case PYX_TRANSPORT_RESERVATION_CONFLICT: | |
1993 | /* | |
1994 | * No SENSE Data payload for this case, set SCSI Status | |
1995 | * and queue the response to $FABRIC_MOD. | |
1996 | * | |
1997 | * Uses linux/include/scsi/scsi.h SAM status codes defs | |
1998 | */ | |
1999 | cmd->scsi_status = SAM_STAT_RESERVATION_CONFLICT; | |
2000 | /* | |
2001 | * For UA Interlock Code 11b, a RESERVATION CONFLICT will | |
2002 | * establish a UNIT ATTENTION with PREVIOUS RESERVATION | |
2003 | * CONFLICT STATUS. | |
2004 | * | |
2005 | * See spc4r17, section 7.4.6 Control Mode Page, Table 349 | |
2006 | */ | |
e3d6f909 AG |
2007 | if (cmd->se_sess && |
2008 | cmd->se_dev->se_sub_dev->se_dev_attrib.emulate_ua_intlck_ctrl == 2) | |
2009 | core_scsi3_ua_allocate(cmd->se_sess->se_node_acl, | |
c66ac9db NB |
2010 | cmd->orig_fe_lun, 0x2C, |
2011 | ASCQ_2CH_PREVIOUS_RESERVATION_CONFLICT_STATUS); | |
2012 | ||
07bde79a NB |
2013 | ret = cmd->se_tfo->queue_status(cmd); |
2014 | if (ret == -EAGAIN) | |
2015 | goto queue_full; | |
c66ac9db NB |
2016 | goto check_stop; |
2017 | case PYX_TRANSPORT_USE_SENSE_REASON: | |
2018 | /* | |
2019 | * struct se_cmd->scsi_sense_reason already set | |
2020 | */ | |
2021 | break; | |
2022 | default: | |
6708bb27 | 2023 | pr_err("Unknown transport error for CDB 0x%02x: %d\n", |
a1d8b49a | 2024 | cmd->t_task_cdb[0], |
c66ac9db NB |
2025 | cmd->transport_error_status); |
2026 | cmd->scsi_sense_reason = TCM_UNSUPPORTED_SCSI_OPCODE; | |
2027 | break; | |
2028 | } | |
2029 | ||
2030 | if (!sc) | |
2031 | transport_new_cmd_failure(cmd); | |
07bde79a NB |
2032 | else { |
2033 | ret = transport_send_check_condition_and_sense(cmd, | |
2034 | cmd->scsi_sense_reason, 0); | |
2035 | if (ret == -EAGAIN) | |
2036 | goto queue_full; | |
2037 | } | |
2038 | ||
c66ac9db NB |
2039 | check_stop: |
2040 | transport_lun_remove_cmd(cmd); | |
6708bb27 | 2041 | if (!transport_cmd_check_stop_to_fabric(cmd)) |
c66ac9db | 2042 | ; |
07bde79a NB |
2043 | return; |
2044 | ||
2045 | queue_full: | |
2046 | cmd->t_state = TRANSPORT_COMPLETE_OK; | |
2047 | transport_handle_queue_full(cmd, cmd->se_dev, transport_complete_qf); | |
c66ac9db NB |
2048 | } |
2049 | ||
2050 | static void transport_direct_request_timeout(struct se_cmd *cmd) | |
2051 | { | |
2052 | unsigned long flags; | |
2053 | ||
a1d8b49a | 2054 | spin_lock_irqsave(&cmd->t_state_lock, flags); |
6708bb27 | 2055 | if (!atomic_read(&cmd->t_transport_timeout)) { |
a1d8b49a | 2056 | spin_unlock_irqrestore(&cmd->t_state_lock, flags); |
c66ac9db NB |
2057 | return; |
2058 | } | |
a1d8b49a AG |
2059 | if (atomic_read(&cmd->t_task_cdbs_timeout_left)) { |
2060 | spin_unlock_irqrestore(&cmd->t_state_lock, flags); | |
c66ac9db NB |
2061 | return; |
2062 | } | |
2063 | ||
a1d8b49a AG |
2064 | atomic_sub(atomic_read(&cmd->t_transport_timeout), |
2065 | &cmd->t_se_count); | |
2066 | spin_unlock_irqrestore(&cmd->t_state_lock, flags); | |
c66ac9db NB |
2067 | } |
2068 | ||
2069 | static void transport_generic_request_timeout(struct se_cmd *cmd) | |
2070 | { | |
2071 | unsigned long flags; | |
2072 | ||
2073 | /* | |
a1d8b49a | 2074 | * Reset cmd->t_se_count to allow transport_generic_remove() |
c66ac9db NB |
2075 | * to allow last call to free memory resources. |
2076 | */ | |
a1d8b49a AG |
2077 | spin_lock_irqsave(&cmd->t_state_lock, flags); |
2078 | if (atomic_read(&cmd->t_transport_timeout) > 1) { | |
2079 | int tmp = (atomic_read(&cmd->t_transport_timeout) - 1); | |
c66ac9db | 2080 | |
a1d8b49a | 2081 | atomic_sub(tmp, &cmd->t_se_count); |
c66ac9db | 2082 | } |
a1d8b49a | 2083 | spin_unlock_irqrestore(&cmd->t_state_lock, flags); |
c66ac9db | 2084 | |
35462975 | 2085 | transport_generic_remove(cmd, 0); |
c66ac9db NB |
2086 | } |
2087 | ||
c66ac9db NB |
2088 | static inline u32 transport_lba_21(unsigned char *cdb) |
2089 | { | |
2090 | return ((cdb[1] & 0x1f) << 16) | (cdb[2] << 8) | cdb[3]; | |
2091 | } | |
2092 | ||
2093 | static inline u32 transport_lba_32(unsigned char *cdb) | |
2094 | { | |
2095 | return (cdb[2] << 24) | (cdb[3] << 16) | (cdb[4] << 8) | cdb[5]; | |
2096 | } | |
2097 | ||
2098 | static inline unsigned long long transport_lba_64(unsigned char *cdb) | |
2099 | { | |
2100 | unsigned int __v1, __v2; | |
2101 | ||
2102 | __v1 = (cdb[2] << 24) | (cdb[3] << 16) | (cdb[4] << 8) | cdb[5]; | |
2103 | __v2 = (cdb[6] << 24) | (cdb[7] << 16) | (cdb[8] << 8) | cdb[9]; | |
2104 | ||
2105 | return ((unsigned long long)__v2) | (unsigned long long)__v1 << 32; | |
2106 | } | |
2107 | ||
2108 | /* | |
2109 | * For VARIABLE_LENGTH_CDB w/ 32 byte extended CDBs | |
2110 | */ | |
2111 | static inline unsigned long long transport_lba_64_ext(unsigned char *cdb) | |
2112 | { | |
2113 | unsigned int __v1, __v2; | |
2114 | ||
2115 | __v1 = (cdb[12] << 24) | (cdb[13] << 16) | (cdb[14] << 8) | cdb[15]; | |
2116 | __v2 = (cdb[16] << 24) | (cdb[17] << 16) | (cdb[18] << 8) | cdb[19]; | |
2117 | ||
2118 | return ((unsigned long long)__v2) | (unsigned long long)__v1 << 32; | |
2119 | } | |
2120 | ||
2121 | static void transport_set_supported_SAM_opcode(struct se_cmd *se_cmd) | |
2122 | { | |
2123 | unsigned long flags; | |
2124 | ||
a1d8b49a | 2125 | spin_lock_irqsave(&se_cmd->t_state_lock, flags); |
c66ac9db | 2126 | se_cmd->se_cmd_flags |= SCF_SUPPORTED_SAM_OPCODE; |
a1d8b49a | 2127 | spin_unlock_irqrestore(&se_cmd->t_state_lock, flags); |
c66ac9db NB |
2128 | } |
2129 | ||
2130 | /* | |
2131 | * Called from interrupt context. | |
2132 | */ | |
2133 | static void transport_task_timeout_handler(unsigned long data) | |
2134 | { | |
2135 | struct se_task *task = (struct se_task *)data; | |
e3d6f909 | 2136 | struct se_cmd *cmd = task->task_se_cmd; |
c66ac9db NB |
2137 | unsigned long flags; |
2138 | ||
6708bb27 | 2139 | pr_debug("transport task timeout fired! task: %p cmd: %p\n", task, cmd); |
c66ac9db | 2140 | |
a1d8b49a | 2141 | spin_lock_irqsave(&cmd->t_state_lock, flags); |
c66ac9db | 2142 | if (task->task_flags & TF_STOP) { |
a1d8b49a | 2143 | spin_unlock_irqrestore(&cmd->t_state_lock, flags); |
c66ac9db NB |
2144 | return; |
2145 | } | |
2146 | task->task_flags &= ~TF_RUNNING; | |
2147 | ||
2148 | /* | |
2149 | * Determine if transport_complete_task() has already been called. | |
2150 | */ | |
6708bb27 AG |
2151 | if (!atomic_read(&task->task_active)) { |
2152 | pr_debug("transport task: %p cmd: %p timeout task_active" | |
c66ac9db | 2153 | " == 0\n", task, cmd); |
a1d8b49a | 2154 | spin_unlock_irqrestore(&cmd->t_state_lock, flags); |
c66ac9db NB |
2155 | return; |
2156 | } | |
2157 | ||
a1d8b49a AG |
2158 | atomic_inc(&cmd->t_se_count); |
2159 | atomic_inc(&cmd->t_transport_timeout); | |
2160 | cmd->t_tasks_failed = 1; | |
c66ac9db NB |
2161 | |
2162 | atomic_set(&task->task_timeout, 1); | |
2163 | task->task_error_status = PYX_TRANSPORT_TASK_TIMEOUT; | |
2164 | task->task_scsi_status = 1; | |
2165 | ||
2166 | if (atomic_read(&task->task_stop)) { | |
6708bb27 | 2167 | pr_debug("transport task: %p cmd: %p timeout task_stop" |
c66ac9db | 2168 | " == 1\n", task, cmd); |
a1d8b49a | 2169 | spin_unlock_irqrestore(&cmd->t_state_lock, flags); |
c66ac9db NB |
2170 | complete(&task->task_stop_comp); |
2171 | return; | |
2172 | } | |
2173 | ||
6708bb27 AG |
2174 | if (!atomic_dec_and_test(&cmd->t_task_cdbs_left)) { |
2175 | pr_debug("transport task: %p cmd: %p timeout non zero" | |
c66ac9db | 2176 | " t_task_cdbs_left\n", task, cmd); |
a1d8b49a | 2177 | spin_unlock_irqrestore(&cmd->t_state_lock, flags); |
c66ac9db NB |
2178 | return; |
2179 | } | |
6708bb27 | 2180 | pr_debug("transport task: %p cmd: %p timeout ZERO t_task_cdbs_left\n", |
c66ac9db NB |
2181 | task, cmd); |
2182 | ||
2183 | cmd->t_state = TRANSPORT_COMPLETE_FAILURE; | |
a1d8b49a | 2184 | spin_unlock_irqrestore(&cmd->t_state_lock, flags); |
c66ac9db NB |
2185 | |
2186 | transport_add_cmd_to_queue(cmd, TRANSPORT_COMPLETE_FAILURE); | |
2187 | } | |
2188 | ||
2189 | /* | |
a1d8b49a | 2190 | * Called with cmd->t_state_lock held. |
c66ac9db NB |
2191 | */ |
2192 | static void transport_start_task_timer(struct se_task *task) | |
2193 | { | |
2194 | struct se_device *dev = task->se_dev; | |
2195 | int timeout; | |
2196 | ||
2197 | if (task->task_flags & TF_RUNNING) | |
2198 | return; | |
2199 | /* | |
2200 | * If the task_timeout is disabled, exit now. | |
2201 | */ | |
e3d6f909 | 2202 | timeout = dev->se_sub_dev->se_dev_attrib.task_timeout; |
6708bb27 | 2203 | if (!timeout) |
c66ac9db NB |
2204 | return; |
2205 | ||
2206 | init_timer(&task->task_timer); | |
2207 | task->task_timer.expires = (get_jiffies_64() + timeout * HZ); | |
2208 | task->task_timer.data = (unsigned long) task; | |
2209 | task->task_timer.function = transport_task_timeout_handler; | |
2210 | ||
2211 | task->task_flags |= TF_RUNNING; | |
2212 | add_timer(&task->task_timer); | |
2213 | #if 0 | |
6708bb27 | 2214 | pr_debug("Starting task timer for cmd: %p task: %p seconds:" |
c66ac9db NB |
2215 | " %d\n", task->task_se_cmd, task, timeout); |
2216 | #endif | |
2217 | } | |
2218 | ||
2219 | /* | |
a1d8b49a | 2220 | * Called with spin_lock_irq(&cmd->t_state_lock) held. |
c66ac9db NB |
2221 | */ |
2222 | void __transport_stop_task_timer(struct se_task *task, unsigned long *flags) | |
2223 | { | |
e3d6f909 | 2224 | struct se_cmd *cmd = task->task_se_cmd; |
c66ac9db | 2225 | |
6708bb27 | 2226 | if (!task->task_flags & TF_RUNNING) |
c66ac9db NB |
2227 | return; |
2228 | ||
2229 | task->task_flags |= TF_STOP; | |
a1d8b49a | 2230 | spin_unlock_irqrestore(&cmd->t_state_lock, *flags); |
c66ac9db NB |
2231 | |
2232 | del_timer_sync(&task->task_timer); | |
2233 | ||
a1d8b49a | 2234 | spin_lock_irqsave(&cmd->t_state_lock, *flags); |
c66ac9db NB |
2235 | task->task_flags &= ~TF_RUNNING; |
2236 | task->task_flags &= ~TF_STOP; | |
2237 | } | |
2238 | ||
2239 | static void transport_stop_all_task_timers(struct se_cmd *cmd) | |
2240 | { | |
2241 | struct se_task *task = NULL, *task_tmp; | |
2242 | unsigned long flags; | |
2243 | ||
a1d8b49a | 2244 | spin_lock_irqsave(&cmd->t_state_lock, flags); |
c66ac9db | 2245 | list_for_each_entry_safe(task, task_tmp, |
a1d8b49a | 2246 | &cmd->t_task_list, t_list) |
c66ac9db | 2247 | __transport_stop_task_timer(task, &flags); |
a1d8b49a | 2248 | spin_unlock_irqrestore(&cmd->t_state_lock, flags); |
c66ac9db NB |
2249 | } |
2250 | ||
2251 | static inline int transport_tcq_window_closed(struct se_device *dev) | |
2252 | { | |
2253 | if (dev->dev_tcq_window_closed++ < | |
2254 | PYX_TRANSPORT_WINDOW_CLOSED_THRESHOLD) { | |
2255 | msleep(PYX_TRANSPORT_WINDOW_CLOSED_WAIT_SHORT); | |
2256 | } else | |
2257 | msleep(PYX_TRANSPORT_WINDOW_CLOSED_WAIT_LONG); | |
2258 | ||
e3d6f909 | 2259 | wake_up_interruptible(&dev->dev_queue_obj.thread_wq); |
c66ac9db NB |
2260 | return 0; |
2261 | } | |
2262 | ||
2263 | /* | |
2264 | * Called from Fabric Module context from transport_execute_tasks() | |
2265 | * | |
2266 | * The return of this function determins if the tasks from struct se_cmd | |
2267 | * get added to the execution queue in transport_execute_tasks(), | |
2268 | * or are added to the delayed or ordered lists here. | |
2269 | */ | |
2270 | static inline int transport_execute_task_attr(struct se_cmd *cmd) | |
2271 | { | |
5951146d | 2272 | if (cmd->se_dev->dev_task_attr_type != SAM_TASK_ATTR_EMULATED) |
c66ac9db NB |
2273 | return 1; |
2274 | /* | |
25985edc | 2275 | * Check for the existence of HEAD_OF_QUEUE, and if true return 1 |
c66ac9db NB |
2276 | * to allow the passed struct se_cmd list of tasks to the front of the list. |
2277 | */ | |
e66ecd50 | 2278 | if (cmd->sam_task_attr == MSG_HEAD_TAG) { |
5951146d | 2279 | atomic_inc(&cmd->se_dev->dev_hoq_count); |
c66ac9db | 2280 | smp_mb__after_atomic_inc(); |
6708bb27 | 2281 | pr_debug("Added HEAD_OF_QUEUE for CDB:" |
c66ac9db | 2282 | " 0x%02x, se_ordered_id: %u\n", |
6708bb27 | 2283 | cmd->t_task_cdb[0], |
c66ac9db NB |
2284 | cmd->se_ordered_id); |
2285 | return 1; | |
e66ecd50 | 2286 | } else if (cmd->sam_task_attr == MSG_ORDERED_TAG) { |
5951146d AG |
2287 | spin_lock(&cmd->se_dev->ordered_cmd_lock); |
2288 | list_add_tail(&cmd->se_ordered_node, | |
2289 | &cmd->se_dev->ordered_cmd_list); | |
2290 | spin_unlock(&cmd->se_dev->ordered_cmd_lock); | |
c66ac9db | 2291 | |
5951146d | 2292 | atomic_inc(&cmd->se_dev->dev_ordered_sync); |
c66ac9db NB |
2293 | smp_mb__after_atomic_inc(); |
2294 | ||
6708bb27 | 2295 | pr_debug("Added ORDERED for CDB: 0x%02x to ordered" |
c66ac9db | 2296 | " list, se_ordered_id: %u\n", |
a1d8b49a | 2297 | cmd->t_task_cdb[0], |
c66ac9db NB |
2298 | cmd->se_ordered_id); |
2299 | /* | |
2300 | * Add ORDERED command to tail of execution queue if | |
2301 | * no other older commands exist that need to be | |
2302 | * completed first. | |
2303 | */ | |
6708bb27 | 2304 | if (!atomic_read(&cmd->se_dev->simple_cmds)) |
c66ac9db NB |
2305 | return 1; |
2306 | } else { | |
2307 | /* | |
2308 | * For SIMPLE and UNTAGGED Task Attribute commands | |
2309 | */ | |
5951146d | 2310 | atomic_inc(&cmd->se_dev->simple_cmds); |
c66ac9db NB |
2311 | smp_mb__after_atomic_inc(); |
2312 | } | |
2313 | /* | |
2314 | * Otherwise if one or more outstanding ORDERED task attribute exist, | |
2315 | * add the dormant task(s) built for the passed struct se_cmd to the | |
2316 | * execution queue and become in Active state for this struct se_device. | |
2317 | */ | |
5951146d | 2318 | if (atomic_read(&cmd->se_dev->dev_ordered_sync) != 0) { |
c66ac9db NB |
2319 | /* |
2320 | * Otherwise, add cmd w/ tasks to delayed cmd queue that | |
25985edc | 2321 | * will be drained upon completion of HEAD_OF_QUEUE task. |
c66ac9db | 2322 | */ |
5951146d | 2323 | spin_lock(&cmd->se_dev->delayed_cmd_lock); |
c66ac9db | 2324 | cmd->se_cmd_flags |= SCF_DELAYED_CMD_FROM_SAM_ATTR; |
5951146d AG |
2325 | list_add_tail(&cmd->se_delayed_node, |
2326 | &cmd->se_dev->delayed_cmd_list); | |
2327 | spin_unlock(&cmd->se_dev->delayed_cmd_lock); | |
c66ac9db | 2328 | |
6708bb27 | 2329 | pr_debug("Added CDB: 0x%02x Task Attr: 0x%02x to" |
c66ac9db | 2330 | " delayed CMD list, se_ordered_id: %u\n", |
a1d8b49a | 2331 | cmd->t_task_cdb[0], cmd->sam_task_attr, |
c66ac9db NB |
2332 | cmd->se_ordered_id); |
2333 | /* | |
2334 | * Return zero to let transport_execute_tasks() know | |
2335 | * not to add the delayed tasks to the execution list. | |
2336 | */ | |
2337 | return 0; | |
2338 | } | |
2339 | /* | |
2340 | * Otherwise, no ORDERED task attributes exist.. | |
2341 | */ | |
2342 | return 1; | |
2343 | } | |
2344 | ||
2345 | /* | |
2346 | * Called from fabric module context in transport_generic_new_cmd() and | |
2347 | * transport_generic_process_write() | |
2348 | */ | |
2349 | static int transport_execute_tasks(struct se_cmd *cmd) | |
2350 | { | |
2351 | int add_tasks; | |
2352 | ||
db1620a2 CH |
2353 | if (se_dev_check_online(cmd->se_orig_obj_ptr) != 0) { |
2354 | cmd->transport_error_status = PYX_TRANSPORT_LU_COMM_FAILURE; | |
2355 | transport_generic_request_failure(cmd, NULL, 0, 1); | |
2356 | return 0; | |
c66ac9db | 2357 | } |
db1620a2 | 2358 | |
c66ac9db NB |
2359 | /* |
2360 | * Call transport_cmd_check_stop() to see if a fabric exception | |
25985edc | 2361 | * has occurred that prevents execution. |
c66ac9db | 2362 | */ |
6708bb27 | 2363 | if (!transport_cmd_check_stop(cmd, 0, TRANSPORT_PROCESSING)) { |
c66ac9db NB |
2364 | /* |
2365 | * Check for SAM Task Attribute emulation and HEAD_OF_QUEUE | |
2366 | * attribute for the tasks of the received struct se_cmd CDB | |
2367 | */ | |
2368 | add_tasks = transport_execute_task_attr(cmd); | |
e3d6f909 | 2369 | if (!add_tasks) |
c66ac9db NB |
2370 | goto execute_tasks; |
2371 | /* | |
2372 | * This calls transport_add_tasks_from_cmd() to handle | |
2373 | * HEAD_OF_QUEUE ordering for SAM Task Attribute emulation | |
2374 | * (if enabled) in __transport_add_task_to_execute_queue() and | |
2375 | * transport_add_task_check_sam_attr(). | |
2376 | */ | |
2377 | transport_add_tasks_from_cmd(cmd); | |
2378 | } | |
2379 | /* | |
2380 | * Kick the execution queue for the cmd associated struct se_device | |
2381 | * storage object. | |
2382 | */ | |
2383 | execute_tasks: | |
5951146d | 2384 | __transport_execute_tasks(cmd->se_dev); |
c66ac9db NB |
2385 | return 0; |
2386 | } | |
2387 | ||
2388 | /* | |
2389 | * Called to check struct se_device tcq depth window, and once open pull struct se_task | |
2390 | * from struct se_device->execute_task_list and | |
2391 | * | |
2392 | * Called from transport_processing_thread() | |
2393 | */ | |
2394 | static int __transport_execute_tasks(struct se_device *dev) | |
2395 | { | |
2396 | int error; | |
2397 | struct se_cmd *cmd = NULL; | |
e3d6f909 | 2398 | struct se_task *task = NULL; |
c66ac9db NB |
2399 | unsigned long flags; |
2400 | ||
2401 | /* | |
2402 | * Check if there is enough room in the device and HBA queue to send | |
a1d8b49a | 2403 | * struct se_tasks to the selected transport. |
c66ac9db NB |
2404 | */ |
2405 | check_depth: | |
e3d6f909 | 2406 | if (!atomic_read(&dev->depth_left)) |
c66ac9db | 2407 | return transport_tcq_window_closed(dev); |
c66ac9db | 2408 | |
e3d6f909 | 2409 | dev->dev_tcq_window_closed = 0; |
c66ac9db | 2410 | |
e3d6f909 AG |
2411 | spin_lock_irq(&dev->execute_task_lock); |
2412 | if (list_empty(&dev->execute_task_list)) { | |
2413 | spin_unlock_irq(&dev->execute_task_lock); | |
c66ac9db NB |
2414 | return 0; |
2415 | } | |
e3d6f909 AG |
2416 | task = list_first_entry(&dev->execute_task_list, |
2417 | struct se_task, t_execute_list); | |
2418 | list_del(&task->t_execute_list); | |
2419 | atomic_set(&task->task_execute_queue, 0); | |
2420 | atomic_dec(&dev->execute_tasks); | |
2421 | spin_unlock_irq(&dev->execute_task_lock); | |
c66ac9db NB |
2422 | |
2423 | atomic_dec(&dev->depth_left); | |
c66ac9db | 2424 | |
e3d6f909 | 2425 | cmd = task->task_se_cmd; |
c66ac9db | 2426 | |
a1d8b49a | 2427 | spin_lock_irqsave(&cmd->t_state_lock, flags); |
c66ac9db NB |
2428 | atomic_set(&task->task_active, 1); |
2429 | atomic_set(&task->task_sent, 1); | |
a1d8b49a | 2430 | atomic_inc(&cmd->t_task_cdbs_sent); |
c66ac9db | 2431 | |
a1d8b49a AG |
2432 | if (atomic_read(&cmd->t_task_cdbs_sent) == |
2433 | cmd->t_task_list_num) | |
c66ac9db NB |
2434 | atomic_set(&cmd->transport_sent, 1); |
2435 | ||
2436 | transport_start_task_timer(task); | |
a1d8b49a | 2437 | spin_unlock_irqrestore(&cmd->t_state_lock, flags); |
c66ac9db NB |
2438 | /* |
2439 | * The struct se_cmd->transport_emulate_cdb() function pointer is used | |
e3d6f909 | 2440 | * to grab REPORT_LUNS and other CDBs we want to handle before they hit the |
c66ac9db NB |
2441 | * struct se_subsystem_api->do_task() caller below. |
2442 | */ | |
2443 | if (cmd->transport_emulate_cdb) { | |
2444 | error = cmd->transport_emulate_cdb(cmd); | |
2445 | if (error != 0) { | |
2446 | cmd->transport_error_status = error; | |
2447 | atomic_set(&task->task_active, 0); | |
2448 | atomic_set(&cmd->transport_sent, 0); | |
2449 | transport_stop_tasks_for_cmd(cmd); | |
2450 | transport_generic_request_failure(cmd, dev, 0, 1); | |
2451 | goto check_depth; | |
2452 | } | |
2453 | /* | |
2454 | * Handle the successful completion for transport_emulate_cdb() | |
2455 | * for synchronous operation, following SCF_EMULATE_CDB_ASYNC | |
2456 | * Otherwise the caller is expected to complete the task with | |
2457 | * proper status. | |
2458 | */ | |
2459 | if (!(cmd->se_cmd_flags & SCF_EMULATE_CDB_ASYNC)) { | |
2460 | cmd->scsi_status = SAM_STAT_GOOD; | |
2461 | task->task_scsi_status = GOOD; | |
2462 | transport_complete_task(task, 1); | |
2463 | } | |
2464 | } else { | |
2465 | /* | |
2466 | * Currently for all virtual TCM plugins including IBLOCK, FILEIO and | |
2467 | * RAMDISK we use the internal transport_emulate_control_cdb() logic | |
2468 | * with struct se_subsystem_api callers for the primary SPC-3 TYPE_DISK | |
2469 | * LUN emulation code. | |
2470 | * | |
2471 | * For TCM/pSCSI and all other SCF_SCSI_DATA_SG_IO_CDB I/O tasks we | |
2472 | * call ->do_task() directly and let the underlying TCM subsystem plugin | |
2473 | * code handle the CDB emulation. | |
2474 | */ | |
e3d6f909 AG |
2475 | if ((dev->transport->transport_type != TRANSPORT_PLUGIN_PHBA_PDEV) && |
2476 | (!(task->task_se_cmd->se_cmd_flags & SCF_SCSI_DATA_SG_IO_CDB))) | |
c66ac9db NB |
2477 | error = transport_emulate_control_cdb(task); |
2478 | else | |
e3d6f909 | 2479 | error = dev->transport->do_task(task); |
c66ac9db NB |
2480 | |
2481 | if (error != 0) { | |
2482 | cmd->transport_error_status = error; | |
2483 | atomic_set(&task->task_active, 0); | |
2484 | atomic_set(&cmd->transport_sent, 0); | |
2485 | transport_stop_tasks_for_cmd(cmd); | |
2486 | transport_generic_request_failure(cmd, dev, 0, 1); | |
2487 | } | |
2488 | } | |
2489 | ||
2490 | goto check_depth; | |
2491 | ||
2492 | return 0; | |
2493 | } | |
2494 | ||
2495 | void transport_new_cmd_failure(struct se_cmd *se_cmd) | |
2496 | { | |
2497 | unsigned long flags; | |
2498 | /* | |
2499 | * Any unsolicited data will get dumped for failed command inside of | |
2500 | * the fabric plugin | |
2501 | */ | |
a1d8b49a | 2502 | spin_lock_irqsave(&se_cmd->t_state_lock, flags); |
c66ac9db NB |
2503 | se_cmd->se_cmd_flags |= SCF_SE_CMD_FAILED; |
2504 | se_cmd->se_cmd_flags |= SCF_SCSI_CDB_EXCEPTION; | |
a1d8b49a | 2505 | spin_unlock_irqrestore(&se_cmd->t_state_lock, flags); |
c66ac9db NB |
2506 | } |
2507 | ||
2508 | static void transport_nop_wait_for_tasks(struct se_cmd *, int, int); | |
2509 | ||
2510 | static inline u32 transport_get_sectors_6( | |
2511 | unsigned char *cdb, | |
2512 | struct se_cmd *cmd, | |
2513 | int *ret) | |
2514 | { | |
5951146d | 2515 | struct se_device *dev = cmd->se_dev; |
c66ac9db NB |
2516 | |
2517 | /* | |
2518 | * Assume TYPE_DISK for non struct se_device objects. | |
2519 | * Use 8-bit sector value. | |
2520 | */ | |
2521 | if (!dev) | |
2522 | goto type_disk; | |
2523 | ||
2524 | /* | |
2525 | * Use 24-bit allocation length for TYPE_TAPE. | |
2526 | */ | |
e3d6f909 | 2527 | if (dev->transport->get_device_type(dev) == TYPE_TAPE) |
c66ac9db NB |
2528 | return (u32)(cdb[2] << 16) + (cdb[3] << 8) + cdb[4]; |
2529 | ||
2530 | /* | |
2531 | * Everything else assume TYPE_DISK Sector CDB location. | |
2532 | * Use 8-bit sector value. | |
2533 | */ | |
2534 | type_disk: | |
2535 | return (u32)cdb[4]; | |
2536 | } | |
2537 | ||
2538 | static inline u32 transport_get_sectors_10( | |
2539 | unsigned char *cdb, | |
2540 | struct se_cmd *cmd, | |
2541 | int *ret) | |
2542 | { | |
5951146d | 2543 | struct se_device *dev = cmd->se_dev; |
c66ac9db NB |
2544 | |
2545 | /* | |
2546 | * Assume TYPE_DISK for non struct se_device objects. | |
2547 | * Use 16-bit sector value. | |
2548 | */ | |
2549 | if (!dev) | |
2550 | goto type_disk; | |
2551 | ||
2552 | /* | |
2553 | * XXX_10 is not defined in SSC, throw an exception | |
2554 | */ | |
e3d6f909 AG |
2555 | if (dev->transport->get_device_type(dev) == TYPE_TAPE) { |
2556 | *ret = -EINVAL; | |
c66ac9db NB |
2557 | return 0; |
2558 | } | |
2559 | ||
2560 | /* | |
2561 | * Everything else assume TYPE_DISK Sector CDB location. | |
2562 | * Use 16-bit sector value. | |
2563 | */ | |
2564 | type_disk: | |
2565 | return (u32)(cdb[7] << 8) + cdb[8]; | |
2566 | } | |
2567 | ||
2568 | static inline u32 transport_get_sectors_12( | |
2569 | unsigned char *cdb, | |
2570 | struct se_cmd *cmd, | |
2571 | int *ret) | |
2572 | { | |
5951146d | 2573 | struct se_device *dev = cmd->se_dev; |
c66ac9db NB |
2574 | |
2575 | /* | |
2576 | * Assume TYPE_DISK for non struct se_device objects. | |
2577 | * Use 32-bit sector value. | |
2578 | */ | |
2579 | if (!dev) | |
2580 | goto type_disk; | |
2581 | ||
2582 | /* | |
2583 | * XXX_12 is not defined in SSC, throw an exception | |
2584 | */ | |
e3d6f909 AG |
2585 | if (dev->transport->get_device_type(dev) == TYPE_TAPE) { |
2586 | *ret = -EINVAL; | |
c66ac9db NB |
2587 | return 0; |
2588 | } | |
2589 | ||
2590 | /* | |
2591 | * Everything else assume TYPE_DISK Sector CDB location. | |
2592 | * Use 32-bit sector value. | |
2593 | */ | |
2594 | type_disk: | |
2595 | return (u32)(cdb[6] << 24) + (cdb[7] << 16) + (cdb[8] << 8) + cdb[9]; | |
2596 | } | |
2597 | ||
2598 | static inline u32 transport_get_sectors_16( | |
2599 | unsigned char *cdb, | |
2600 | struct se_cmd *cmd, | |
2601 | int *ret) | |
2602 | { | |
5951146d | 2603 | struct se_device *dev = cmd->se_dev; |
c66ac9db NB |
2604 | |
2605 | /* | |
2606 | * Assume TYPE_DISK for non struct se_device objects. | |
2607 | * Use 32-bit sector value. | |
2608 | */ | |
2609 | if (!dev) | |
2610 | goto type_disk; | |
2611 | ||
2612 | /* | |
2613 | * Use 24-bit allocation length for TYPE_TAPE. | |
2614 | */ | |
e3d6f909 | 2615 | if (dev->transport->get_device_type(dev) == TYPE_TAPE) |
c66ac9db NB |
2616 | return (u32)(cdb[12] << 16) + (cdb[13] << 8) + cdb[14]; |
2617 | ||
2618 | type_disk: | |
2619 | return (u32)(cdb[10] << 24) + (cdb[11] << 16) + | |
2620 | (cdb[12] << 8) + cdb[13]; | |
2621 | } | |
2622 | ||
2623 | /* | |
2624 | * Used for VARIABLE_LENGTH_CDB WRITE_32 and READ_32 variants | |
2625 | */ | |
2626 | static inline u32 transport_get_sectors_32( | |
2627 | unsigned char *cdb, | |
2628 | struct se_cmd *cmd, | |
2629 | int *ret) | |
2630 | { | |
2631 | /* | |
2632 | * Assume TYPE_DISK for non struct se_device objects. | |
2633 | * Use 32-bit sector value. | |
2634 | */ | |
2635 | return (u32)(cdb[28] << 24) + (cdb[29] << 16) + | |
2636 | (cdb[30] << 8) + cdb[31]; | |
2637 | ||
2638 | } | |
2639 | ||
2640 | static inline u32 transport_get_size( | |
2641 | u32 sectors, | |
2642 | unsigned char *cdb, | |
2643 | struct se_cmd *cmd) | |
2644 | { | |
5951146d | 2645 | struct se_device *dev = cmd->se_dev; |
c66ac9db | 2646 | |
e3d6f909 | 2647 | if (dev->transport->get_device_type(dev) == TYPE_TAPE) { |
c66ac9db | 2648 | if (cdb[1] & 1) { /* sectors */ |
e3d6f909 | 2649 | return dev->se_sub_dev->se_dev_attrib.block_size * sectors; |
c66ac9db NB |
2650 | } else /* bytes */ |
2651 | return sectors; | |
2652 | } | |
2653 | #if 0 | |
6708bb27 | 2654 | pr_debug("Returning block_size: %u, sectors: %u == %u for" |
e3d6f909 AG |
2655 | " %s object\n", dev->se_sub_dev->se_dev_attrib.block_size, sectors, |
2656 | dev->se_sub_dev->se_dev_attrib.block_size * sectors, | |
2657 | dev->transport->name); | |
c66ac9db | 2658 | #endif |
e3d6f909 | 2659 | return dev->se_sub_dev->se_dev_attrib.block_size * sectors; |
c66ac9db NB |
2660 | } |
2661 | ||
c66ac9db NB |
2662 | static void transport_xor_callback(struct se_cmd *cmd) |
2663 | { | |
2664 | unsigned char *buf, *addr; | |
ec98f782 | 2665 | struct scatterlist *sg; |
c66ac9db NB |
2666 | unsigned int offset; |
2667 | int i; | |
ec98f782 | 2668 | int count; |
c66ac9db NB |
2669 | /* |
2670 | * From sbc3r22.pdf section 5.48 XDWRITEREAD (10) command | |
2671 | * | |
2672 | * 1) read the specified logical block(s); | |
2673 | * 2) transfer logical blocks from the data-out buffer; | |
2674 | * 3) XOR the logical blocks transferred from the data-out buffer with | |
2675 | * the logical blocks read, storing the resulting XOR data in a buffer; | |
2676 | * 4) if the DISABLE WRITE bit is set to zero, then write the logical | |
2677 | * blocks transferred from the data-out buffer; and | |
2678 | * 5) transfer the resulting XOR data to the data-in buffer. | |
2679 | */ | |
2680 | buf = kmalloc(cmd->data_length, GFP_KERNEL); | |
6708bb27 AG |
2681 | if (!buf) { |
2682 | pr_err("Unable to allocate xor_callback buf\n"); | |
c66ac9db NB |
2683 | return; |
2684 | } | |
2685 | /* | |
ec98f782 | 2686 | * Copy the scatterlist WRITE buffer located at cmd->t_data_sg |
c66ac9db NB |
2687 | * into the locally allocated *buf |
2688 | */ | |
ec98f782 AG |
2689 | sg_copy_to_buffer(cmd->t_data_sg, |
2690 | cmd->t_data_nents, | |
2691 | buf, | |
2692 | cmd->data_length); | |
2693 | ||
c66ac9db NB |
2694 | /* |
2695 | * Now perform the XOR against the BIDI read memory located at | |
a1d8b49a | 2696 | * cmd->t_mem_bidi_list |
c66ac9db NB |
2697 | */ |
2698 | ||
2699 | offset = 0; | |
ec98f782 AG |
2700 | for_each_sg(cmd->t_bidi_data_sg, sg, cmd->t_bidi_data_nents, count) { |
2701 | addr = kmap_atomic(sg_page(sg), KM_USER0); | |
2702 | if (!addr) | |
c66ac9db NB |
2703 | goto out; |
2704 | ||
ec98f782 AG |
2705 | for (i = 0; i < sg->length; i++) |
2706 | *(addr + sg->offset + i) ^= *(buf + offset + i); | |
c66ac9db | 2707 | |
ec98f782 | 2708 | offset += sg->length; |
c66ac9db NB |
2709 | kunmap_atomic(addr, KM_USER0); |
2710 | } | |
ec98f782 | 2711 | |
c66ac9db NB |
2712 | out: |
2713 | kfree(buf); | |
2714 | } | |
2715 | ||
2716 | /* | |
2717 | * Used to obtain Sense Data from underlying Linux/SCSI struct scsi_cmnd | |
2718 | */ | |
2719 | static int transport_get_sense_data(struct se_cmd *cmd) | |
2720 | { | |
2721 | unsigned char *buffer = cmd->sense_buffer, *sense_buffer = NULL; | |
2722 | struct se_device *dev; | |
2723 | struct se_task *task = NULL, *task_tmp; | |
2724 | unsigned long flags; | |
2725 | u32 offset = 0; | |
2726 | ||
e3d6f909 AG |
2727 | WARN_ON(!cmd->se_lun); |
2728 | ||
a1d8b49a | 2729 | spin_lock_irqsave(&cmd->t_state_lock, flags); |
c66ac9db | 2730 | if (cmd->se_cmd_flags & SCF_SENT_CHECK_CONDITION) { |
a1d8b49a | 2731 | spin_unlock_irqrestore(&cmd->t_state_lock, flags); |
c66ac9db NB |
2732 | return 0; |
2733 | } | |
2734 | ||
2735 | list_for_each_entry_safe(task, task_tmp, | |
a1d8b49a | 2736 | &cmd->t_task_list, t_list) { |
c66ac9db NB |
2737 | |
2738 | if (!task->task_sense) | |
2739 | continue; | |
2740 | ||
2741 | dev = task->se_dev; | |
6708bb27 | 2742 | if (!dev) |
c66ac9db NB |
2743 | continue; |
2744 | ||
e3d6f909 | 2745 | if (!dev->transport->get_sense_buffer) { |
6708bb27 | 2746 | pr_err("dev->transport->get_sense_buffer" |
c66ac9db NB |
2747 | " is NULL\n"); |
2748 | continue; | |
2749 | } | |
2750 | ||
e3d6f909 | 2751 | sense_buffer = dev->transport->get_sense_buffer(task); |
6708bb27 AG |
2752 | if (!sense_buffer) { |
2753 | pr_err("ITT[0x%08x]_TASK[%d]: Unable to locate" | |
c66ac9db | 2754 | " sense buffer for task with sense\n", |
e3d6f909 | 2755 | cmd->se_tfo->get_task_tag(cmd), task->task_no); |
c66ac9db NB |
2756 | continue; |
2757 | } | |
a1d8b49a | 2758 | spin_unlock_irqrestore(&cmd->t_state_lock, flags); |
c66ac9db | 2759 | |
e3d6f909 | 2760 | offset = cmd->se_tfo->set_fabric_sense_len(cmd, |
c66ac9db NB |
2761 | TRANSPORT_SENSE_BUFFER); |
2762 | ||
5951146d | 2763 | memcpy(&buffer[offset], sense_buffer, |
c66ac9db NB |
2764 | TRANSPORT_SENSE_BUFFER); |
2765 | cmd->scsi_status = task->task_scsi_status; | |
2766 | /* Automatically padded */ | |
2767 | cmd->scsi_sense_length = | |
2768 | (TRANSPORT_SENSE_BUFFER + offset); | |
2769 | ||
6708bb27 | 2770 | pr_debug("HBA_[%u]_PLUG[%s]: Set SAM STATUS: 0x%02x" |
c66ac9db | 2771 | " and sense\n", |
e3d6f909 | 2772 | dev->se_hba->hba_id, dev->transport->name, |
c66ac9db NB |
2773 | cmd->scsi_status); |
2774 | return 0; | |
2775 | } | |
a1d8b49a | 2776 | spin_unlock_irqrestore(&cmd->t_state_lock, flags); |
c66ac9db NB |
2777 | |
2778 | return -1; | |
2779 | } | |
2780 | ||
c66ac9db NB |
2781 | static int |
2782 | transport_handle_reservation_conflict(struct se_cmd *cmd) | |
2783 | { | |
2784 | cmd->transport_wait_for_tasks = &transport_nop_wait_for_tasks; | |
2785 | cmd->se_cmd_flags |= SCF_SCSI_CDB_EXCEPTION; | |
2786 | cmd->se_cmd_flags |= SCF_SCSI_RESERVATION_CONFLICT; | |
2787 | cmd->scsi_status = SAM_STAT_RESERVATION_CONFLICT; | |
2788 | /* | |
2789 | * For UA Interlock Code 11b, a RESERVATION CONFLICT will | |
2790 | * establish a UNIT ATTENTION with PREVIOUS RESERVATION | |
2791 | * CONFLICT STATUS. | |
2792 | * | |
2793 | * See spc4r17, section 7.4.6 Control Mode Page, Table 349 | |
2794 | */ | |
e3d6f909 AG |
2795 | if (cmd->se_sess && |
2796 | cmd->se_dev->se_sub_dev->se_dev_attrib.emulate_ua_intlck_ctrl == 2) | |
2797 | core_scsi3_ua_allocate(cmd->se_sess->se_node_acl, | |
c66ac9db NB |
2798 | cmd->orig_fe_lun, 0x2C, |
2799 | ASCQ_2CH_PREVIOUS_RESERVATION_CONFLICT_STATUS); | |
5951146d | 2800 | return -EINVAL; |
c66ac9db NB |
2801 | } |
2802 | ||
ec98f782 AG |
2803 | static inline long long transport_dev_end_lba(struct se_device *dev) |
2804 | { | |
2805 | return dev->transport->get_blocks(dev) + 1; | |
2806 | } | |
2807 | ||
2808 | static int transport_cmd_get_valid_sectors(struct se_cmd *cmd) | |
2809 | { | |
2810 | struct se_device *dev = cmd->se_dev; | |
2811 | u32 sectors; | |
2812 | ||
2813 | if (dev->transport->get_device_type(dev) != TYPE_DISK) | |
2814 | return 0; | |
2815 | ||
2816 | sectors = (cmd->data_length / dev->se_sub_dev->se_dev_attrib.block_size); | |
2817 | ||
6708bb27 AG |
2818 | if ((cmd->t_task_lba + sectors) > transport_dev_end_lba(dev)) { |
2819 | pr_err("LBA: %llu Sectors: %u exceeds" | |
ec98f782 AG |
2820 | " transport_dev_end_lba(): %llu\n", |
2821 | cmd->t_task_lba, sectors, | |
2822 | transport_dev_end_lba(dev)); | |
6708bb27 | 2823 | pr_err(" We should return CHECK_CONDITION" |
ec98f782 AG |
2824 | " but we don't yet\n"); |
2825 | return 0; | |
2826 | } | |
2827 | ||
2828 | return sectors; | |
2829 | } | |
2830 | ||
c66ac9db NB |
2831 | /* transport_generic_cmd_sequencer(): |
2832 | * | |
2833 | * Generic Command Sequencer that should work for most DAS transport | |
2834 | * drivers. | |
2835 | * | |
2836 | * Called from transport_generic_allocate_tasks() in the $FABRIC_MOD | |
2837 | * RX Thread. | |
2838 | * | |
2839 | * FIXME: Need to support other SCSI OPCODES where as well. | |
2840 | */ | |
2841 | static int transport_generic_cmd_sequencer( | |
2842 | struct se_cmd *cmd, | |
2843 | unsigned char *cdb) | |
2844 | { | |
5951146d | 2845 | struct se_device *dev = cmd->se_dev; |
c66ac9db NB |
2846 | struct se_subsystem_dev *su_dev = dev->se_sub_dev; |
2847 | int ret = 0, sector_ret = 0, passthrough; | |
2848 | u32 sectors = 0, size = 0, pr_reg_type = 0; | |
2849 | u16 service_action; | |
2850 | u8 alua_ascq = 0; | |
2851 | /* | |
2852 | * Check for an existing UNIT ATTENTION condition | |
2853 | */ | |
2854 | if (core_scsi3_ua_check(cmd, cdb) < 0) { | |
2855 | cmd->transport_wait_for_tasks = | |
2856 | &transport_nop_wait_for_tasks; | |
2857 | cmd->se_cmd_flags |= SCF_SCSI_CDB_EXCEPTION; | |
2858 | cmd->scsi_sense_reason = TCM_CHECK_CONDITION_UNIT_ATTENTION; | |
5951146d | 2859 | return -EINVAL; |
c66ac9db NB |
2860 | } |
2861 | /* | |
2862 | * Check status of Asymmetric Logical Unit Assignment port | |
2863 | */ | |
e3d6f909 | 2864 | ret = su_dev->t10_alua.alua_state_check(cmd, cdb, &alua_ascq); |
c66ac9db NB |
2865 | if (ret != 0) { |
2866 | cmd->transport_wait_for_tasks = &transport_nop_wait_for_tasks; | |
2867 | /* | |
25985edc | 2868 | * Set SCSI additional sense code (ASC) to 'LUN Not Accessible'; |
c66ac9db NB |
2869 | * The ALUA additional sense code qualifier (ASCQ) is determined |
2870 | * by the ALUA primary or secondary access state.. | |
2871 | */ | |
2872 | if (ret > 0) { | |
2873 | #if 0 | |
6708bb27 | 2874 | pr_debug("[%s]: ALUA TG Port not available," |
c66ac9db | 2875 | " SenseKey: NOT_READY, ASC/ASCQ: 0x04/0x%02x\n", |
e3d6f909 | 2876 | cmd->se_tfo->get_fabric_name(), alua_ascq); |
c66ac9db NB |
2877 | #endif |
2878 | transport_set_sense_codes(cmd, 0x04, alua_ascq); | |
2879 | cmd->se_cmd_flags |= SCF_SCSI_CDB_EXCEPTION; | |
2880 | cmd->scsi_sense_reason = TCM_CHECK_CONDITION_NOT_READY; | |
5951146d | 2881 | return -EINVAL; |
c66ac9db NB |
2882 | } |
2883 | goto out_invalid_cdb_field; | |
2884 | } | |
2885 | /* | |
2886 | * Check status for SPC-3 Persistent Reservations | |
2887 | */ | |
e3d6f909 AG |
2888 | if (su_dev->t10_pr.pr_ops.t10_reservation_check(cmd, &pr_reg_type) != 0) { |
2889 | if (su_dev->t10_pr.pr_ops.t10_seq_non_holder( | |
c66ac9db NB |
2890 | cmd, cdb, pr_reg_type) != 0) |
2891 | return transport_handle_reservation_conflict(cmd); | |
2892 | /* | |
2893 | * This means the CDB is allowed for the SCSI Initiator port | |
2894 | * when said port is *NOT* holding the legacy SPC-2 or | |
2895 | * SPC-3 Persistent Reservation. | |
2896 | */ | |
2897 | } | |
2898 | ||
2899 | switch (cdb[0]) { | |
2900 | case READ_6: | |
2901 | sectors = transport_get_sectors_6(cdb, cmd, §or_ret); | |
2902 | if (sector_ret) | |
2903 | goto out_unsupported_cdb; | |
2904 | size = transport_get_size(sectors, cdb, cmd); | |
2905 | cmd->transport_split_cdb = &split_cdb_XX_6; | |
a1d8b49a | 2906 | cmd->t_task_lba = transport_lba_21(cdb); |
c66ac9db NB |
2907 | cmd->se_cmd_flags |= SCF_SCSI_DATA_SG_IO_CDB; |
2908 | break; | |
2909 | case READ_10: | |
2910 | sectors = transport_get_sectors_10(cdb, cmd, §or_ret); | |
2911 | if (sector_ret) | |
2912 | goto out_unsupported_cdb; | |
2913 | size = transport_get_size(sectors, cdb, cmd); | |
2914 | cmd->transport_split_cdb = &split_cdb_XX_10; | |
a1d8b49a | 2915 | cmd->t_task_lba = transport_lba_32(cdb); |
c66ac9db NB |
2916 | cmd->se_cmd_flags |= SCF_SCSI_DATA_SG_IO_CDB; |
2917 | break; | |
2918 | case READ_12: | |
2919 | sectors = transport_get_sectors_12(cdb, cmd, §or_ret); | |
2920 | if (sector_ret) | |
2921 | goto out_unsupported_cdb; | |
2922 | size = transport_get_size(sectors, cdb, cmd); | |
2923 | cmd->transport_split_cdb = &split_cdb_XX_12; | |
a1d8b49a | 2924 | cmd->t_task_lba = transport_lba_32(cdb); |
c66ac9db NB |
2925 | cmd->se_cmd_flags |= SCF_SCSI_DATA_SG_IO_CDB; |
2926 | break; | |
2927 | case READ_16: | |
2928 | sectors = transport_get_sectors_16(cdb, cmd, §or_ret); | |
2929 | if (sector_ret) | |
2930 | goto out_unsupported_cdb; | |
2931 | size = transport_get_size(sectors, cdb, cmd); | |
2932 | cmd->transport_split_cdb = &split_cdb_XX_16; | |
a1d8b49a | 2933 | cmd->t_task_lba = transport_lba_64(cdb); |
c66ac9db NB |
2934 | cmd->se_cmd_flags |= SCF_SCSI_DATA_SG_IO_CDB; |
2935 | break; | |
2936 | case WRITE_6: | |
2937 | sectors = transport_get_sectors_6(cdb, cmd, §or_ret); | |
2938 | if (sector_ret) | |
2939 | goto out_unsupported_cdb; | |
2940 | size = transport_get_size(sectors, cdb, cmd); | |
2941 | cmd->transport_split_cdb = &split_cdb_XX_6; | |
a1d8b49a | 2942 | cmd->t_task_lba = transport_lba_21(cdb); |
c66ac9db NB |
2943 | cmd->se_cmd_flags |= SCF_SCSI_DATA_SG_IO_CDB; |
2944 | break; | |
2945 | case WRITE_10: | |
2946 | sectors = transport_get_sectors_10(cdb, cmd, §or_ret); | |
2947 | if (sector_ret) | |
2948 | goto out_unsupported_cdb; | |
2949 | size = transport_get_size(sectors, cdb, cmd); | |
2950 | cmd->transport_split_cdb = &split_cdb_XX_10; | |
a1d8b49a AG |
2951 | cmd->t_task_lba = transport_lba_32(cdb); |
2952 | cmd->t_tasks_fua = (cdb[1] & 0x8); | |
c66ac9db NB |
2953 | cmd->se_cmd_flags |= SCF_SCSI_DATA_SG_IO_CDB; |
2954 | break; | |
2955 | case WRITE_12: | |
2956 | sectors = transport_get_sectors_12(cdb, cmd, §or_ret); | |
2957 | if (sector_ret) | |
2958 | goto out_unsupported_cdb; | |
2959 | size = transport_get_size(sectors, cdb, cmd); | |
2960 | cmd->transport_split_cdb = &split_cdb_XX_12; | |
a1d8b49a AG |
2961 | cmd->t_task_lba = transport_lba_32(cdb); |
2962 | cmd->t_tasks_fua = (cdb[1] & 0x8); | |
c66ac9db NB |
2963 | cmd->se_cmd_flags |= SCF_SCSI_DATA_SG_IO_CDB; |
2964 | break; | |
2965 | case WRITE_16: | |
2966 | sectors = transport_get_sectors_16(cdb, cmd, §or_ret); | |
2967 | if (sector_ret) | |
2968 | goto out_unsupported_cdb; | |
2969 | size = transport_get_size(sectors, cdb, cmd); | |
2970 | cmd->transport_split_cdb = &split_cdb_XX_16; | |
a1d8b49a AG |
2971 | cmd->t_task_lba = transport_lba_64(cdb); |
2972 | cmd->t_tasks_fua = (cdb[1] & 0x8); | |
c66ac9db NB |
2973 | cmd->se_cmd_flags |= SCF_SCSI_DATA_SG_IO_CDB; |
2974 | break; | |
2975 | case XDWRITEREAD_10: | |
2976 | if ((cmd->data_direction != DMA_TO_DEVICE) || | |
a1d8b49a | 2977 | !(cmd->t_tasks_bidi)) |
c66ac9db NB |
2978 | goto out_invalid_cdb_field; |
2979 | sectors = transport_get_sectors_10(cdb, cmd, §or_ret); | |
2980 | if (sector_ret) | |
2981 | goto out_unsupported_cdb; | |
2982 | size = transport_get_size(sectors, cdb, cmd); | |
2983 | cmd->transport_split_cdb = &split_cdb_XX_10; | |
a1d8b49a | 2984 | cmd->t_task_lba = transport_lba_32(cdb); |
c66ac9db | 2985 | cmd->se_cmd_flags |= SCF_SCSI_DATA_SG_IO_CDB; |
e3d6f909 | 2986 | passthrough = (dev->transport->transport_type == |
c66ac9db NB |
2987 | TRANSPORT_PLUGIN_PHBA_PDEV); |
2988 | /* | |
2989 | * Skip the remaining assignments for TCM/PSCSI passthrough | |
2990 | */ | |
2991 | if (passthrough) | |
2992 | break; | |
2993 | /* | |
2994 | * Setup BIDI XOR callback to be run during transport_generic_complete_ok() | |
2995 | */ | |
2996 | cmd->transport_complete_callback = &transport_xor_callback; | |
a1d8b49a | 2997 | cmd->t_tasks_fua = (cdb[1] & 0x8); |
c66ac9db NB |
2998 | break; |
2999 | case VARIABLE_LENGTH_CMD: | |
3000 | service_action = get_unaligned_be16(&cdb[8]); | |
3001 | /* | |
3002 | * Determine if this is TCM/PSCSI device and we should disable | |
3003 | * internal emulation for this CDB. | |
3004 | */ | |
e3d6f909 | 3005 | passthrough = (dev->transport->transport_type == |
c66ac9db NB |
3006 | TRANSPORT_PLUGIN_PHBA_PDEV); |
3007 | ||
3008 | switch (service_action) { | |
3009 | case XDWRITEREAD_32: | |
3010 | sectors = transport_get_sectors_32(cdb, cmd, §or_ret); | |
3011 | if (sector_ret) | |
3012 | goto out_unsupported_cdb; | |
3013 | size = transport_get_size(sectors, cdb, cmd); | |
3014 | /* | |
3015 | * Use WRITE_32 and READ_32 opcodes for the emulated | |
3016 | * XDWRITE_READ_32 logic. | |
3017 | */ | |
3018 | cmd->transport_split_cdb = &split_cdb_XX_32; | |
a1d8b49a | 3019 | cmd->t_task_lba = transport_lba_64_ext(cdb); |
c66ac9db NB |
3020 | cmd->se_cmd_flags |= SCF_SCSI_DATA_SG_IO_CDB; |
3021 | ||
3022 | /* | |
3023 | * Skip the remaining assignments for TCM/PSCSI passthrough | |
3024 | */ | |
3025 | if (passthrough) | |
3026 | break; | |
3027 | ||
3028 | /* | |
3029 | * Setup BIDI XOR callback to be run during | |
3030 | * transport_generic_complete_ok() | |
3031 | */ | |
3032 | cmd->transport_complete_callback = &transport_xor_callback; | |
a1d8b49a | 3033 | cmd->t_tasks_fua = (cdb[10] & 0x8); |
c66ac9db NB |
3034 | break; |
3035 | case WRITE_SAME_32: | |
3036 | sectors = transport_get_sectors_32(cdb, cmd, §or_ret); | |
3037 | if (sector_ret) | |
3038 | goto out_unsupported_cdb; | |
dd3a5ad8 | 3039 | |
6708bb27 | 3040 | if (sectors) |
dd3a5ad8 | 3041 | size = transport_get_size(sectors, cdb, cmd); |
6708bb27 AG |
3042 | else { |
3043 | pr_err("WSNZ=1, WRITE_SAME w/sectors=0 not" | |
3044 | " supported\n"); | |
3045 | goto out_invalid_cdb_field; | |
3046 | } | |
dd3a5ad8 | 3047 | |
a1d8b49a | 3048 | cmd->t_task_lba = get_unaligned_be64(&cdb[12]); |
c66ac9db NB |
3049 | cmd->se_cmd_flags |= SCF_SCSI_CONTROL_SG_IO_CDB; |
3050 | ||
3051 | /* | |
3052 | * Skip the remaining assignments for TCM/PSCSI passthrough | |
3053 | */ | |
3054 | if (passthrough) | |
3055 | break; | |
3056 | ||
3057 | if ((cdb[10] & 0x04) || (cdb[10] & 0x02)) { | |
6708bb27 | 3058 | pr_err("WRITE_SAME PBDATA and LBDATA" |
c66ac9db NB |
3059 | " bits not supported for Block Discard" |
3060 | " Emulation\n"); | |
3061 | goto out_invalid_cdb_field; | |
3062 | } | |
3063 | /* | |
3064 | * Currently for the emulated case we only accept | |
3065 | * tpws with the UNMAP=1 bit set. | |
3066 | */ | |
3067 | if (!(cdb[10] & 0x08)) { | |
6708bb27 | 3068 | pr_err("WRITE_SAME w/o UNMAP bit not" |
c66ac9db NB |
3069 | " supported for Block Discard Emulation\n"); |
3070 | goto out_invalid_cdb_field; | |
3071 | } | |
3072 | break; | |
3073 | default: | |
6708bb27 | 3074 | pr_err("VARIABLE_LENGTH_CMD service action" |
c66ac9db NB |
3075 | " 0x%04x not supported\n", service_action); |
3076 | goto out_unsupported_cdb; | |
3077 | } | |
3078 | break; | |
e434f1f1 | 3079 | case MAINTENANCE_IN: |
e3d6f909 | 3080 | if (dev->transport->get_device_type(dev) != TYPE_ROM) { |
c66ac9db NB |
3081 | /* MAINTENANCE_IN from SCC-2 */ |
3082 | /* | |
3083 | * Check for emulated MI_REPORT_TARGET_PGS. | |
3084 | */ | |
3085 | if (cdb[1] == MI_REPORT_TARGET_PGS) { | |
3086 | cmd->transport_emulate_cdb = | |
e3d6f909 | 3087 | (su_dev->t10_alua.alua_type == |
c66ac9db | 3088 | SPC3_ALUA_EMULATED) ? |
e3d6f909 | 3089 | core_emulate_report_target_port_groups : |
c66ac9db NB |
3090 | NULL; |
3091 | } | |
3092 | size = (cdb[6] << 24) | (cdb[7] << 16) | | |
3093 | (cdb[8] << 8) | cdb[9]; | |
3094 | } else { | |
3095 | /* GPCMD_SEND_KEY from multi media commands */ | |
3096 | size = (cdb[8] << 8) + cdb[9]; | |
3097 | } | |
05d1c7c0 | 3098 | cmd->se_cmd_flags |= SCF_SCSI_CONTROL_SG_IO_CDB; |
c66ac9db NB |
3099 | break; |
3100 | case MODE_SELECT: | |
3101 | size = cdb[4]; | |
3102 | cmd->se_cmd_flags |= SCF_SCSI_CONTROL_SG_IO_CDB; | |
3103 | break; | |
3104 | case MODE_SELECT_10: | |
3105 | size = (cdb[7] << 8) + cdb[8]; | |
3106 | cmd->se_cmd_flags |= SCF_SCSI_CONTROL_SG_IO_CDB; | |
3107 | break; | |
3108 | case MODE_SENSE: | |
3109 | size = cdb[4]; | |
05d1c7c0 | 3110 | cmd->se_cmd_flags |= SCF_SCSI_CONTROL_SG_IO_CDB; |
c66ac9db NB |
3111 | break; |
3112 | case MODE_SENSE_10: | |
3113 | case GPCMD_READ_BUFFER_CAPACITY: | |
3114 | case GPCMD_SEND_OPC: | |
3115 | case LOG_SELECT: | |
3116 | case LOG_SENSE: | |
3117 | size = (cdb[7] << 8) + cdb[8]; | |
05d1c7c0 | 3118 | cmd->se_cmd_flags |= SCF_SCSI_CONTROL_SG_IO_CDB; |
c66ac9db NB |
3119 | break; |
3120 | case READ_BLOCK_LIMITS: | |
3121 | size = READ_BLOCK_LEN; | |
05d1c7c0 | 3122 | cmd->se_cmd_flags |= SCF_SCSI_CONTROL_SG_IO_CDB; |
c66ac9db NB |
3123 | break; |
3124 | case GPCMD_GET_CONFIGURATION: | |
3125 | case GPCMD_READ_FORMAT_CAPACITIES: | |
3126 | case GPCMD_READ_DISC_INFO: | |
3127 | case GPCMD_READ_TRACK_RZONE_INFO: | |
3128 | size = (cdb[7] << 8) + cdb[8]; | |
3129 | cmd->se_cmd_flags |= SCF_SCSI_CONTROL_SG_IO_CDB; | |
3130 | break; | |
3131 | case PERSISTENT_RESERVE_IN: | |
3132 | case PERSISTENT_RESERVE_OUT: | |
3133 | cmd->transport_emulate_cdb = | |
e3d6f909 | 3134 | (su_dev->t10_pr.res_type == |
c66ac9db | 3135 | SPC3_PERSISTENT_RESERVATIONS) ? |
e3d6f909 | 3136 | core_scsi3_emulate_pr : NULL; |
c66ac9db | 3137 | size = (cdb[7] << 8) + cdb[8]; |
05d1c7c0 | 3138 | cmd->se_cmd_flags |= SCF_SCSI_CONTROL_SG_IO_CDB; |
c66ac9db NB |
3139 | break; |
3140 | case GPCMD_MECHANISM_STATUS: | |
3141 | case GPCMD_READ_DVD_STRUCTURE: | |
3142 | size = (cdb[8] << 8) + cdb[9]; | |
3143 | cmd->se_cmd_flags |= SCF_SCSI_CONTROL_SG_IO_CDB; | |
3144 | break; | |
3145 | case READ_POSITION: | |
3146 | size = READ_POSITION_LEN; | |
05d1c7c0 | 3147 | cmd->se_cmd_flags |= SCF_SCSI_CONTROL_SG_IO_CDB; |
c66ac9db | 3148 | break; |
e434f1f1 | 3149 | case MAINTENANCE_OUT: |
e3d6f909 | 3150 | if (dev->transport->get_device_type(dev) != TYPE_ROM) { |
c66ac9db NB |
3151 | /* MAINTENANCE_OUT from SCC-2 |
3152 | * | |
3153 | * Check for emulated MO_SET_TARGET_PGS. | |
3154 | */ | |
3155 | if (cdb[1] == MO_SET_TARGET_PGS) { | |
3156 | cmd->transport_emulate_cdb = | |
e3d6f909 | 3157 | (su_dev->t10_alua.alua_type == |
c66ac9db | 3158 | SPC3_ALUA_EMULATED) ? |
e3d6f909 | 3159 | core_emulate_set_target_port_groups : |
c66ac9db NB |
3160 | NULL; |
3161 | } | |
3162 | ||
3163 | size = (cdb[6] << 24) | (cdb[7] << 16) | | |
3164 | (cdb[8] << 8) | cdb[9]; | |
3165 | } else { | |
3166 | /* GPCMD_REPORT_KEY from multi media commands */ | |
3167 | size = (cdb[8] << 8) + cdb[9]; | |
3168 | } | |
05d1c7c0 | 3169 | cmd->se_cmd_flags |= SCF_SCSI_CONTROL_SG_IO_CDB; |
c66ac9db NB |
3170 | break; |
3171 | case INQUIRY: | |
3172 | size = (cdb[3] << 8) + cdb[4]; | |
3173 | /* | |
3174 | * Do implict HEAD_OF_QUEUE processing for INQUIRY. | |
3175 | * See spc4r17 section 5.3 | |
3176 | */ | |
5951146d | 3177 | if (cmd->se_dev->dev_task_attr_type == SAM_TASK_ATTR_EMULATED) |
e66ecd50 | 3178 | cmd->sam_task_attr = MSG_HEAD_TAG; |
05d1c7c0 | 3179 | cmd->se_cmd_flags |= SCF_SCSI_CONTROL_SG_IO_CDB; |
c66ac9db NB |
3180 | break; |
3181 | case READ_BUFFER: | |
3182 | size = (cdb[6] << 16) + (cdb[7] << 8) + cdb[8]; | |
05d1c7c0 | 3183 | cmd->se_cmd_flags |= SCF_SCSI_CONTROL_SG_IO_CDB; |
c66ac9db NB |
3184 | break; |
3185 | case READ_CAPACITY: | |
3186 | size = READ_CAP_LEN; | |
05d1c7c0 | 3187 | cmd->se_cmd_flags |= SCF_SCSI_CONTROL_SG_IO_CDB; |
c66ac9db NB |
3188 | break; |
3189 | case READ_MEDIA_SERIAL_NUMBER: | |
3190 | case SECURITY_PROTOCOL_IN: | |
3191 | case SECURITY_PROTOCOL_OUT: | |
3192 | size = (cdb[6] << 24) | (cdb[7] << 16) | (cdb[8] << 8) | cdb[9]; | |
05d1c7c0 | 3193 | cmd->se_cmd_flags |= SCF_SCSI_CONTROL_SG_IO_CDB; |
c66ac9db NB |
3194 | break; |
3195 | case SERVICE_ACTION_IN: | |
3196 | case ACCESS_CONTROL_IN: | |
3197 | case ACCESS_CONTROL_OUT: | |
3198 | case EXTENDED_COPY: | |
3199 | case READ_ATTRIBUTE: | |
3200 | case RECEIVE_COPY_RESULTS: | |
3201 | case WRITE_ATTRIBUTE: | |
3202 | size = (cdb[10] << 24) | (cdb[11] << 16) | | |
3203 | (cdb[12] << 8) | cdb[13]; | |
05d1c7c0 | 3204 | cmd->se_cmd_flags |= SCF_SCSI_CONTROL_SG_IO_CDB; |
c66ac9db NB |
3205 | break; |
3206 | case RECEIVE_DIAGNOSTIC: | |
3207 | case SEND_DIAGNOSTIC: | |
3208 | size = (cdb[3] << 8) | cdb[4]; | |
05d1c7c0 | 3209 | cmd->se_cmd_flags |= SCF_SCSI_CONTROL_SG_IO_CDB; |
c66ac9db NB |
3210 | break; |
3211 | /* #warning FIXME: Figure out correct GPCMD_READ_CD blocksize. */ | |
3212 | #if 0 | |
3213 | case GPCMD_READ_CD: | |
3214 | sectors = (cdb[6] << 16) + (cdb[7] << 8) + cdb[8]; | |
3215 | size = (2336 * sectors); | |
05d1c7c0 | 3216 | cmd->se_cmd_flags |= SCF_SCSI_CONTROL_SG_IO_CDB; |
c66ac9db NB |
3217 | break; |
3218 | #endif | |
3219 | case READ_TOC: | |
3220 | size = cdb[8]; | |
05d1c7c0 | 3221 | cmd->se_cmd_flags |= SCF_SCSI_CONTROL_SG_IO_CDB; |
c66ac9db NB |
3222 | break; |
3223 | case REQUEST_SENSE: | |
3224 | size = cdb[4]; | |
05d1c7c0 | 3225 | cmd->se_cmd_flags |= SCF_SCSI_CONTROL_SG_IO_CDB; |
c66ac9db NB |
3226 | break; |
3227 | case READ_ELEMENT_STATUS: | |
3228 | size = 65536 * cdb[7] + 256 * cdb[8] + cdb[9]; | |
05d1c7c0 | 3229 | cmd->se_cmd_flags |= SCF_SCSI_CONTROL_SG_IO_CDB; |
c66ac9db NB |
3230 | break; |
3231 | case WRITE_BUFFER: | |
3232 | size = (cdb[6] << 16) + (cdb[7] << 8) + cdb[8]; | |
05d1c7c0 | 3233 | cmd->se_cmd_flags |= SCF_SCSI_CONTROL_SG_IO_CDB; |
c66ac9db NB |
3234 | break; |
3235 | case RESERVE: | |
3236 | case RESERVE_10: | |
3237 | /* | |
3238 | * The SPC-2 RESERVE does not contain a size in the SCSI CDB. | |
3239 | * Assume the passthrough or $FABRIC_MOD will tell us about it. | |
3240 | */ | |
3241 | if (cdb[0] == RESERVE_10) | |
3242 | size = (cdb[7] << 8) | cdb[8]; | |
3243 | else | |
3244 | size = cmd->data_length; | |
3245 | ||
3246 | /* | |
3247 | * Setup the legacy emulated handler for SPC-2 and | |
3248 | * >= SPC-3 compatible reservation handling (CRH=1) | |
3249 | * Otherwise, we assume the underlying SCSI logic is | |
3250 | * is running in SPC_PASSTHROUGH, and wants reservations | |
3251 | * emulation disabled. | |
3252 | */ | |
3253 | cmd->transport_emulate_cdb = | |
e3d6f909 | 3254 | (su_dev->t10_pr.res_type != |
c66ac9db | 3255 | SPC_PASSTHROUGH) ? |
e3d6f909 | 3256 | core_scsi2_emulate_crh : NULL; |
c66ac9db NB |
3257 | cmd->se_cmd_flags |= SCF_SCSI_NON_DATA_CDB; |
3258 | break; | |
3259 | case RELEASE: | |
3260 | case RELEASE_10: | |
3261 | /* | |
3262 | * The SPC-2 RELEASE does not contain a size in the SCSI CDB. | |
3263 | * Assume the passthrough or $FABRIC_MOD will tell us about it. | |
3264 | */ | |
3265 | if (cdb[0] == RELEASE_10) | |
3266 | size = (cdb[7] << 8) | cdb[8]; | |
3267 | else | |
3268 | size = cmd->data_length; | |
3269 | ||
3270 | cmd->transport_emulate_cdb = | |
e3d6f909 | 3271 | (su_dev->t10_pr.res_type != |
c66ac9db | 3272 | SPC_PASSTHROUGH) ? |
e3d6f909 | 3273 | core_scsi2_emulate_crh : NULL; |
c66ac9db NB |
3274 | cmd->se_cmd_flags |= SCF_SCSI_NON_DATA_CDB; |
3275 | break; | |
3276 | case SYNCHRONIZE_CACHE: | |
3277 | case 0x91: /* SYNCHRONIZE_CACHE_16: */ | |
3278 | /* | |
3279 | * Extract LBA and range to be flushed for emulated SYNCHRONIZE_CACHE | |
3280 | */ | |
3281 | if (cdb[0] == SYNCHRONIZE_CACHE) { | |
3282 | sectors = transport_get_sectors_10(cdb, cmd, §or_ret); | |
a1d8b49a | 3283 | cmd->t_task_lba = transport_lba_32(cdb); |
c66ac9db NB |
3284 | } else { |
3285 | sectors = transport_get_sectors_16(cdb, cmd, §or_ret); | |
a1d8b49a | 3286 | cmd->t_task_lba = transport_lba_64(cdb); |
c66ac9db NB |
3287 | } |
3288 | if (sector_ret) | |
3289 | goto out_unsupported_cdb; | |
3290 | ||
3291 | size = transport_get_size(sectors, cdb, cmd); | |
3292 | cmd->se_cmd_flags |= SCF_SCSI_NON_DATA_CDB; | |
3293 | ||
3294 | /* | |
3295 | * For TCM/pSCSI passthrough, skip cmd->transport_emulate_cdb() | |
3296 | */ | |
e3d6f909 | 3297 | if (dev->transport->transport_type == TRANSPORT_PLUGIN_PHBA_PDEV) |
c66ac9db NB |
3298 | break; |
3299 | /* | |
3300 | * Set SCF_EMULATE_CDB_ASYNC to ensure asynchronous operation | |
3301 | * for SYNCHRONIZE_CACHE* Immed=1 case in __transport_execute_tasks() | |
3302 | */ | |
3303 | cmd->se_cmd_flags |= SCF_EMULATE_CDB_ASYNC; | |
3304 | /* | |
3305 | * Check to ensure that LBA + Range does not exceed past end of | |
3306 | * device. | |
3307 | */ | |
a1d8b49a | 3308 | if (!transport_cmd_get_valid_sectors(cmd)) |
c66ac9db NB |
3309 | goto out_invalid_cdb_field; |
3310 | break; | |
3311 | case UNMAP: | |
3312 | size = get_unaligned_be16(&cdb[7]); | |
05d1c7c0 | 3313 | cmd->se_cmd_flags |= SCF_SCSI_CONTROL_SG_IO_CDB; |
c66ac9db NB |
3314 | break; |
3315 | case WRITE_SAME_16: | |
3316 | sectors = transport_get_sectors_16(cdb, cmd, §or_ret); | |
3317 | if (sector_ret) | |
3318 | goto out_unsupported_cdb; | |
dd3a5ad8 | 3319 | |
6708bb27 | 3320 | if (sectors) |
dd3a5ad8 | 3321 | size = transport_get_size(sectors, cdb, cmd); |
6708bb27 AG |
3322 | else { |
3323 | pr_err("WSNZ=1, WRITE_SAME w/sectors=0 not supported\n"); | |
3324 | goto out_invalid_cdb_field; | |
3325 | } | |
dd3a5ad8 | 3326 | |
5db0753b | 3327 | cmd->t_task_lba = get_unaligned_be64(&cdb[2]); |
e3d6f909 | 3328 | passthrough = (dev->transport->transport_type == |
c66ac9db NB |
3329 | TRANSPORT_PLUGIN_PHBA_PDEV); |
3330 | /* | |
3331 | * Determine if the received WRITE_SAME_16 is used to for direct | |
3332 | * passthrough into Linux/SCSI with struct request via TCM/pSCSI | |
3333 | * or we are signaling the use of internal WRITE_SAME + UNMAP=1 | |
3334 | * emulation for -> Linux/BLOCK disbard with TCM/IBLOCK and | |
3335 | * TCM/FILEIO subsystem plugin backstores. | |
3336 | */ | |
6708bb27 | 3337 | if (!passthrough) { |
c66ac9db | 3338 | if ((cdb[1] & 0x04) || (cdb[1] & 0x02)) { |
6708bb27 | 3339 | pr_err("WRITE_SAME PBDATA and LBDATA" |
c66ac9db NB |
3340 | " bits not supported for Block Discard" |
3341 | " Emulation\n"); | |
3342 | goto out_invalid_cdb_field; | |
3343 | } | |
3344 | /* | |
3345 | * Currently for the emulated case we only accept | |
3346 | * tpws with the UNMAP=1 bit set. | |
3347 | */ | |
3348 | if (!(cdb[1] & 0x08)) { | |
6708bb27 | 3349 | pr_err("WRITE_SAME w/o UNMAP bit not " |
c66ac9db NB |
3350 | " supported for Block Discard Emulation\n"); |
3351 | goto out_invalid_cdb_field; | |
3352 | } | |
3353 | } | |
3354 | cmd->se_cmd_flags |= SCF_SCSI_CONTROL_SG_IO_CDB; | |
3355 | break; | |
3356 | case ALLOW_MEDIUM_REMOVAL: | |
3357 | case GPCMD_CLOSE_TRACK: | |
3358 | case ERASE: | |
3359 | case INITIALIZE_ELEMENT_STATUS: | |
3360 | case GPCMD_LOAD_UNLOAD: | |
3361 | case REZERO_UNIT: | |
3362 | case SEEK_10: | |
3363 | case GPCMD_SET_SPEED: | |
3364 | case SPACE: | |
3365 | case START_STOP: | |
3366 | case TEST_UNIT_READY: | |
3367 | case VERIFY: | |
3368 | case WRITE_FILEMARKS: | |
3369 | case MOVE_MEDIUM: | |
3370 | cmd->se_cmd_flags |= SCF_SCSI_NON_DATA_CDB; | |
3371 | break; | |
3372 | case REPORT_LUNS: | |
3373 | cmd->transport_emulate_cdb = | |
e3d6f909 | 3374 | transport_core_report_lun_response; |
c66ac9db NB |
3375 | size = (cdb[6] << 24) | (cdb[7] << 16) | (cdb[8] << 8) | cdb[9]; |
3376 | /* | |
3377 | * Do implict HEAD_OF_QUEUE processing for REPORT_LUNS | |
3378 | * See spc4r17 section 5.3 | |
3379 | */ | |
5951146d | 3380 | if (cmd->se_dev->dev_task_attr_type == SAM_TASK_ATTR_EMULATED) |
e66ecd50 | 3381 | cmd->sam_task_attr = MSG_HEAD_TAG; |
05d1c7c0 | 3382 | cmd->se_cmd_flags |= SCF_SCSI_CONTROL_SG_IO_CDB; |
c66ac9db NB |
3383 | break; |
3384 | default: | |
6708bb27 | 3385 | pr_warn("TARGET_CORE[%s]: Unsupported SCSI Opcode" |
c66ac9db | 3386 | " 0x%02x, sending CHECK_CONDITION.\n", |
e3d6f909 | 3387 | cmd->se_tfo->get_fabric_name(), cdb[0]); |
c66ac9db NB |
3388 | cmd->transport_wait_for_tasks = &transport_nop_wait_for_tasks; |
3389 | goto out_unsupported_cdb; | |
3390 | } | |
3391 | ||
3392 | if (size != cmd->data_length) { | |
6708bb27 | 3393 | pr_warn("TARGET_CORE[%s]: Expected Transfer Length:" |
c66ac9db | 3394 | " %u does not match SCSI CDB Length: %u for SAM Opcode:" |
e3d6f909 | 3395 | " 0x%02x\n", cmd->se_tfo->get_fabric_name(), |
c66ac9db NB |
3396 | cmd->data_length, size, cdb[0]); |
3397 | ||
3398 | cmd->cmd_spdtl = size; | |
3399 | ||
3400 | if (cmd->data_direction == DMA_TO_DEVICE) { | |
6708bb27 | 3401 | pr_err("Rejecting underflow/overflow" |
c66ac9db NB |
3402 | " WRITE data\n"); |
3403 | goto out_invalid_cdb_field; | |
3404 | } | |
3405 | /* | |
3406 | * Reject READ_* or WRITE_* with overflow/underflow for | |
3407 | * type SCF_SCSI_DATA_SG_IO_CDB. | |
3408 | */ | |
6708bb27 AG |
3409 | if (!ret && (dev->se_sub_dev->se_dev_attrib.block_size != 512)) { |
3410 | pr_err("Failing OVERFLOW/UNDERFLOW for LBA op" | |
c66ac9db | 3411 | " CDB on non 512-byte sector setup subsystem" |
e3d6f909 | 3412 | " plugin: %s\n", dev->transport->name); |
c66ac9db NB |
3413 | /* Returns CHECK_CONDITION + INVALID_CDB_FIELD */ |
3414 | goto out_invalid_cdb_field; | |
3415 | } | |
3416 | ||
3417 | if (size > cmd->data_length) { | |
3418 | cmd->se_cmd_flags |= SCF_OVERFLOW_BIT; | |
3419 | cmd->residual_count = (size - cmd->data_length); | |
3420 | } else { | |
3421 | cmd->se_cmd_flags |= SCF_UNDERFLOW_BIT; | |
3422 | cmd->residual_count = (cmd->data_length - size); | |
3423 | } | |
3424 | cmd->data_length = size; | |
3425 | } | |
3426 | ||
d0229ae3 AG |
3427 | /* Let's limit control cdbs to a page, for simplicity's sake. */ |
3428 | if ((cmd->se_cmd_flags & SCF_SCSI_CONTROL_SG_IO_CDB) && | |
3429 | size > PAGE_SIZE) | |
3430 | goto out_invalid_cdb_field; | |
3431 | ||
c66ac9db NB |
3432 | transport_set_supported_SAM_opcode(cmd); |
3433 | return ret; | |
3434 | ||
3435 | out_unsupported_cdb: | |
3436 | cmd->se_cmd_flags |= SCF_SCSI_CDB_EXCEPTION; | |
3437 | cmd->scsi_sense_reason = TCM_UNSUPPORTED_SCSI_OPCODE; | |
5951146d | 3438 | return -EINVAL; |
c66ac9db NB |
3439 | out_invalid_cdb_field: |
3440 | cmd->se_cmd_flags |= SCF_SCSI_CDB_EXCEPTION; | |
3441 | cmd->scsi_sense_reason = TCM_INVALID_CDB_FIELD; | |
5951146d | 3442 | return -EINVAL; |
c66ac9db NB |
3443 | } |
3444 | ||
c66ac9db NB |
3445 | /* |
3446 | * Called from transport_generic_complete_ok() and | |
3447 | * transport_generic_request_failure() to determine which dormant/delayed | |
3448 | * and ordered cmds need to have their tasks added to the execution queue. | |
3449 | */ | |
3450 | static void transport_complete_task_attr(struct se_cmd *cmd) | |
3451 | { | |
5951146d | 3452 | struct se_device *dev = cmd->se_dev; |
c66ac9db NB |
3453 | struct se_cmd *cmd_p, *cmd_tmp; |
3454 | int new_active_tasks = 0; | |
3455 | ||
e66ecd50 | 3456 | if (cmd->sam_task_attr == MSG_SIMPLE_TAG) { |
c66ac9db NB |
3457 | atomic_dec(&dev->simple_cmds); |
3458 | smp_mb__after_atomic_dec(); | |
3459 | dev->dev_cur_ordered_id++; | |
6708bb27 | 3460 | pr_debug("Incremented dev->dev_cur_ordered_id: %u for" |
c66ac9db NB |
3461 | " SIMPLE: %u\n", dev->dev_cur_ordered_id, |
3462 | cmd->se_ordered_id); | |
e66ecd50 | 3463 | } else if (cmd->sam_task_attr == MSG_HEAD_TAG) { |
c66ac9db NB |
3464 | atomic_dec(&dev->dev_hoq_count); |
3465 | smp_mb__after_atomic_dec(); | |
3466 | dev->dev_cur_ordered_id++; | |
6708bb27 | 3467 | pr_debug("Incremented dev_cur_ordered_id: %u for" |
c66ac9db NB |
3468 | " HEAD_OF_QUEUE: %u\n", dev->dev_cur_ordered_id, |
3469 | cmd->se_ordered_id); | |
e66ecd50 | 3470 | } else if (cmd->sam_task_attr == MSG_ORDERED_TAG) { |
c66ac9db | 3471 | spin_lock(&dev->ordered_cmd_lock); |
5951146d | 3472 | list_del(&cmd->se_ordered_node); |
c66ac9db NB |
3473 | atomic_dec(&dev->dev_ordered_sync); |
3474 | smp_mb__after_atomic_dec(); | |
3475 | spin_unlock(&dev->ordered_cmd_lock); | |
3476 | ||
3477 | dev->dev_cur_ordered_id++; | |
6708bb27 | 3478 | pr_debug("Incremented dev_cur_ordered_id: %u for ORDERED:" |
c66ac9db NB |
3479 | " %u\n", dev->dev_cur_ordered_id, cmd->se_ordered_id); |
3480 | } | |
3481 | /* | |
3482 | * Process all commands up to the last received | |
3483 | * ORDERED task attribute which requires another blocking | |
3484 | * boundary | |
3485 | */ | |
3486 | spin_lock(&dev->delayed_cmd_lock); | |
3487 | list_for_each_entry_safe(cmd_p, cmd_tmp, | |
5951146d | 3488 | &dev->delayed_cmd_list, se_delayed_node) { |
c66ac9db | 3489 | |
5951146d | 3490 | list_del(&cmd_p->se_delayed_node); |
c66ac9db NB |
3491 | spin_unlock(&dev->delayed_cmd_lock); |
3492 | ||
6708bb27 | 3493 | pr_debug("Calling add_tasks() for" |
c66ac9db NB |
3494 | " cmd_p: 0x%02x Task Attr: 0x%02x" |
3495 | " Dormant -> Active, se_ordered_id: %u\n", | |
6708bb27 | 3496 | cmd_p->t_task_cdb[0], |
c66ac9db NB |
3497 | cmd_p->sam_task_attr, cmd_p->se_ordered_id); |
3498 | ||
3499 | transport_add_tasks_from_cmd(cmd_p); | |
3500 | new_active_tasks++; | |
3501 | ||
3502 | spin_lock(&dev->delayed_cmd_lock); | |
e66ecd50 | 3503 | if (cmd_p->sam_task_attr == MSG_ORDERED_TAG) |
c66ac9db NB |
3504 | break; |
3505 | } | |
3506 | spin_unlock(&dev->delayed_cmd_lock); | |
3507 | /* | |
3508 | * If new tasks have become active, wake up the transport thread | |
3509 | * to do the processing of the Active tasks. | |
3510 | */ | |
3511 | if (new_active_tasks != 0) | |
e3d6f909 | 3512 | wake_up_interruptible(&dev->dev_queue_obj.thread_wq); |
c66ac9db NB |
3513 | } |
3514 | ||
07bde79a NB |
3515 | static int transport_complete_qf(struct se_cmd *cmd) |
3516 | { | |
3517 | int ret = 0; | |
3518 | ||
3519 | if (cmd->se_cmd_flags & SCF_TRANSPORT_TASK_SENSE) | |
3520 | return cmd->se_tfo->queue_status(cmd); | |
3521 | ||
3522 | switch (cmd->data_direction) { | |
3523 | case DMA_FROM_DEVICE: | |
3524 | ret = cmd->se_tfo->queue_data_in(cmd); | |
3525 | break; | |
3526 | case DMA_TO_DEVICE: | |
ec98f782 | 3527 | if (cmd->t_bidi_data_sg) { |
07bde79a NB |
3528 | ret = cmd->se_tfo->queue_data_in(cmd); |
3529 | if (ret < 0) | |
3530 | return ret; | |
3531 | } | |
3532 | /* Fall through for DMA_TO_DEVICE */ | |
3533 | case DMA_NONE: | |
3534 | ret = cmd->se_tfo->queue_status(cmd); | |
3535 | break; | |
3536 | default: | |
3537 | break; | |
3538 | } | |
3539 | ||
3540 | return ret; | |
3541 | } | |
3542 | ||
3543 | static void transport_handle_queue_full( | |
3544 | struct se_cmd *cmd, | |
3545 | struct se_device *dev, | |
3546 | int (*qf_callback)(struct se_cmd *)) | |
3547 | { | |
3548 | spin_lock_irq(&dev->qf_cmd_lock); | |
3549 | cmd->se_cmd_flags |= SCF_EMULATE_QUEUE_FULL; | |
3550 | cmd->transport_qf_callback = qf_callback; | |
3551 | list_add_tail(&cmd->se_qf_node, &cmd->se_dev->qf_cmd_list); | |
3552 | atomic_inc(&dev->dev_qf_count); | |
3553 | smp_mb__after_atomic_inc(); | |
3554 | spin_unlock_irq(&cmd->se_dev->qf_cmd_lock); | |
3555 | ||
3556 | schedule_work(&cmd->se_dev->qf_work_queue); | |
3557 | } | |
3558 | ||
c66ac9db NB |
3559 | static void transport_generic_complete_ok(struct se_cmd *cmd) |
3560 | { | |
07bde79a | 3561 | int reason = 0, ret; |
c66ac9db NB |
3562 | /* |
3563 | * Check if we need to move delayed/dormant tasks from cmds on the | |
3564 | * delayed execution list after a HEAD_OF_QUEUE or ORDERED Task | |
3565 | * Attribute. | |
3566 | */ | |
5951146d | 3567 | if (cmd->se_dev->dev_task_attr_type == SAM_TASK_ATTR_EMULATED) |
c66ac9db | 3568 | transport_complete_task_attr(cmd); |
07bde79a NB |
3569 | /* |
3570 | * Check to schedule QUEUE_FULL work, or execute an existing | |
3571 | * cmd->transport_qf_callback() | |
3572 | */ | |
3573 | if (atomic_read(&cmd->se_dev->dev_qf_count) != 0) | |
3574 | schedule_work(&cmd->se_dev->qf_work_queue); | |
3575 | ||
3576 | if (cmd->transport_qf_callback) { | |
3577 | ret = cmd->transport_qf_callback(cmd); | |
3578 | if (ret < 0) | |
3579 | goto queue_full; | |
3580 | ||
3581 | cmd->transport_qf_callback = NULL; | |
3582 | goto done; | |
3583 | } | |
c66ac9db NB |
3584 | /* |
3585 | * Check if we need to retrieve a sense buffer from | |
3586 | * the struct se_cmd in question. | |
3587 | */ | |
3588 | if (cmd->se_cmd_flags & SCF_TRANSPORT_TASK_SENSE) { | |
3589 | if (transport_get_sense_data(cmd) < 0) | |
3590 | reason = TCM_NON_EXISTENT_LUN; | |
3591 | ||
3592 | /* | |
3593 | * Only set when an struct se_task->task_scsi_status returned | |
3594 | * a non GOOD status. | |
3595 | */ | |
3596 | if (cmd->scsi_status) { | |
07bde79a | 3597 | ret = transport_send_check_condition_and_sense( |
c66ac9db | 3598 | cmd, reason, 1); |
07bde79a NB |
3599 | if (ret == -EAGAIN) |
3600 | goto queue_full; | |
3601 | ||
c66ac9db NB |
3602 | transport_lun_remove_cmd(cmd); |
3603 | transport_cmd_check_stop_to_fabric(cmd); | |
3604 | return; | |
3605 | } | |
3606 | } | |
3607 | /* | |
25985edc | 3608 | * Check for a callback, used by amongst other things |
c66ac9db NB |
3609 | * XDWRITE_READ_10 emulation. |
3610 | */ | |
3611 | if (cmd->transport_complete_callback) | |
3612 | cmd->transport_complete_callback(cmd); | |
3613 | ||
3614 | switch (cmd->data_direction) { | |
3615 | case DMA_FROM_DEVICE: | |
3616 | spin_lock(&cmd->se_lun->lun_sep_lock); | |
e3d6f909 AG |
3617 | if (cmd->se_lun->lun_sep) { |
3618 | cmd->se_lun->lun_sep->sep_stats.tx_data_octets += | |
c66ac9db NB |
3619 | cmd->data_length; |
3620 | } | |
3621 | spin_unlock(&cmd->se_lun->lun_sep_lock); | |
c66ac9db | 3622 | |
07bde79a NB |
3623 | ret = cmd->se_tfo->queue_data_in(cmd); |
3624 | if (ret == -EAGAIN) | |
3625 | goto queue_full; | |
c66ac9db NB |
3626 | break; |
3627 | case DMA_TO_DEVICE: | |
3628 | spin_lock(&cmd->se_lun->lun_sep_lock); | |
e3d6f909 AG |
3629 | if (cmd->se_lun->lun_sep) { |
3630 | cmd->se_lun->lun_sep->sep_stats.rx_data_octets += | |
c66ac9db NB |
3631 | cmd->data_length; |
3632 | } | |
3633 | spin_unlock(&cmd->se_lun->lun_sep_lock); | |
3634 | /* | |
3635 | * Check if we need to send READ payload for BIDI-COMMAND | |
3636 | */ | |
ec98f782 | 3637 | if (cmd->t_bidi_data_sg) { |
c66ac9db | 3638 | spin_lock(&cmd->se_lun->lun_sep_lock); |
e3d6f909 AG |
3639 | if (cmd->se_lun->lun_sep) { |
3640 | cmd->se_lun->lun_sep->sep_stats.tx_data_octets += | |
c66ac9db NB |
3641 | cmd->data_length; |
3642 | } | |
3643 | spin_unlock(&cmd->se_lun->lun_sep_lock); | |
07bde79a NB |
3644 | ret = cmd->se_tfo->queue_data_in(cmd); |
3645 | if (ret == -EAGAIN) | |
3646 | goto queue_full; | |
c66ac9db NB |
3647 | break; |
3648 | } | |
3649 | /* Fall through for DMA_TO_DEVICE */ | |
3650 | case DMA_NONE: | |
07bde79a NB |
3651 | ret = cmd->se_tfo->queue_status(cmd); |
3652 | if (ret == -EAGAIN) | |
3653 | goto queue_full; | |
c66ac9db NB |
3654 | break; |
3655 | default: | |
3656 | break; | |
3657 | } | |
3658 | ||
07bde79a | 3659 | done: |
c66ac9db NB |
3660 | transport_lun_remove_cmd(cmd); |
3661 | transport_cmd_check_stop_to_fabric(cmd); | |
07bde79a NB |
3662 | return; |
3663 | ||
3664 | queue_full: | |
6708bb27 | 3665 | pr_debug("Handling complete_ok QUEUE_FULL: se_cmd: %p," |
07bde79a NB |
3666 | " data_direction: %d\n", cmd, cmd->data_direction); |
3667 | transport_handle_queue_full(cmd, cmd->se_dev, transport_complete_qf); | |
c66ac9db NB |
3668 | } |
3669 | ||
3670 | static void transport_free_dev_tasks(struct se_cmd *cmd) | |
3671 | { | |
3672 | struct se_task *task, *task_tmp; | |
3673 | unsigned long flags; | |
3674 | ||
a1d8b49a | 3675 | spin_lock_irqsave(&cmd->t_state_lock, flags); |
c66ac9db | 3676 | list_for_each_entry_safe(task, task_tmp, |
a1d8b49a | 3677 | &cmd->t_task_list, t_list) { |
c66ac9db NB |
3678 | if (atomic_read(&task->task_active)) |
3679 | continue; | |
3680 | ||
3681 | kfree(task->task_sg_bidi); | |
3682 | kfree(task->task_sg); | |
3683 | ||
3684 | list_del(&task->t_list); | |
3685 | ||
a1d8b49a | 3686 | spin_unlock_irqrestore(&cmd->t_state_lock, flags); |
c66ac9db | 3687 | if (task->se_dev) |
e3d6f909 | 3688 | task->se_dev->transport->free_task(task); |
c66ac9db | 3689 | else |
6708bb27 | 3690 | pr_err("task[%u] - task->se_dev is NULL\n", |
c66ac9db | 3691 | task->task_no); |
a1d8b49a | 3692 | spin_lock_irqsave(&cmd->t_state_lock, flags); |
c66ac9db | 3693 | } |
a1d8b49a | 3694 | spin_unlock_irqrestore(&cmd->t_state_lock, flags); |
c66ac9db NB |
3695 | } |
3696 | ||
6708bb27 | 3697 | static inline void transport_free_sgl(struct scatterlist *sgl, int nents) |
c66ac9db | 3698 | { |
ec98f782 | 3699 | struct scatterlist *sg; |
ec98f782 | 3700 | int count; |
c66ac9db | 3701 | |
6708bb27 AG |
3702 | for_each_sg(sgl, sg, nents, count) |
3703 | __free_page(sg_page(sg)); | |
c66ac9db | 3704 | |
6708bb27 AG |
3705 | kfree(sgl); |
3706 | } | |
c66ac9db | 3707 | |
6708bb27 AG |
3708 | static inline void transport_free_pages(struct se_cmd *cmd) |
3709 | { | |
3710 | if (cmd->se_cmd_flags & SCF_PASSTHROUGH_SG_TO_MEM_NOALLOC) | |
3711 | return; | |
3712 | ||
3713 | transport_free_sgl(cmd->t_data_sg, cmd->t_data_nents); | |
ec98f782 AG |
3714 | cmd->t_data_sg = NULL; |
3715 | cmd->t_data_nents = 0; | |
c66ac9db | 3716 | |
6708bb27 | 3717 | transport_free_sgl(cmd->t_bidi_data_sg, cmd->t_bidi_data_nents); |
ec98f782 AG |
3718 | cmd->t_bidi_data_sg = NULL; |
3719 | cmd->t_bidi_data_nents = 0; | |
c66ac9db NB |
3720 | } |
3721 | ||
3722 | static inline void transport_release_tasks(struct se_cmd *cmd) | |
3723 | { | |
3724 | transport_free_dev_tasks(cmd); | |
3725 | } | |
3726 | ||
3727 | static inline int transport_dec_and_check(struct se_cmd *cmd) | |
3728 | { | |
3729 | unsigned long flags; | |
3730 | ||
a1d8b49a AG |
3731 | spin_lock_irqsave(&cmd->t_state_lock, flags); |
3732 | if (atomic_read(&cmd->t_fe_count)) { | |
6708bb27 | 3733 | if (!atomic_dec_and_test(&cmd->t_fe_count)) { |
a1d8b49a | 3734 | spin_unlock_irqrestore(&cmd->t_state_lock, |
c66ac9db NB |
3735 | flags); |
3736 | return 1; | |
3737 | } | |
3738 | } | |
3739 | ||
a1d8b49a | 3740 | if (atomic_read(&cmd->t_se_count)) { |
6708bb27 | 3741 | if (!atomic_dec_and_test(&cmd->t_se_count)) { |
a1d8b49a | 3742 | spin_unlock_irqrestore(&cmd->t_state_lock, |
c66ac9db NB |
3743 | flags); |
3744 | return 1; | |
3745 | } | |
3746 | } | |
a1d8b49a | 3747 | spin_unlock_irqrestore(&cmd->t_state_lock, flags); |
c66ac9db NB |
3748 | |
3749 | return 0; | |
3750 | } | |
3751 | ||
3752 | static void transport_release_fe_cmd(struct se_cmd *cmd) | |
3753 | { | |
3754 | unsigned long flags; | |
3755 | ||
3756 | if (transport_dec_and_check(cmd)) | |
3757 | return; | |
3758 | ||
a1d8b49a | 3759 | spin_lock_irqsave(&cmd->t_state_lock, flags); |
6708bb27 | 3760 | if (!atomic_read(&cmd->transport_dev_active)) { |
a1d8b49a | 3761 | spin_unlock_irqrestore(&cmd->t_state_lock, flags); |
c66ac9db NB |
3762 | goto free_pages; |
3763 | } | |
a1d8b49a | 3764 | atomic_set(&cmd->transport_dev_active, 0); |
c66ac9db | 3765 | transport_all_task_dev_remove_state(cmd); |
a1d8b49a | 3766 | spin_unlock_irqrestore(&cmd->t_state_lock, flags); |
c66ac9db NB |
3767 | |
3768 | transport_release_tasks(cmd); | |
3769 | free_pages: | |
3770 | transport_free_pages(cmd); | |
3771 | transport_free_se_cmd(cmd); | |
35462975 | 3772 | cmd->se_tfo->release_cmd(cmd); |
c66ac9db NB |
3773 | } |
3774 | ||
35462975 CH |
3775 | static int |
3776 | transport_generic_remove(struct se_cmd *cmd, int session_reinstatement) | |
c66ac9db NB |
3777 | { |
3778 | unsigned long flags; | |
3779 | ||
c66ac9db NB |
3780 | if (transport_dec_and_check(cmd)) { |
3781 | if (session_reinstatement) { | |
a1d8b49a | 3782 | spin_lock_irqsave(&cmd->t_state_lock, flags); |
c66ac9db | 3783 | transport_all_task_dev_remove_state(cmd); |
a1d8b49a | 3784 | spin_unlock_irqrestore(&cmd->t_state_lock, |
c66ac9db NB |
3785 | flags); |
3786 | } | |
3787 | return 1; | |
3788 | } | |
3789 | ||
a1d8b49a | 3790 | spin_lock_irqsave(&cmd->t_state_lock, flags); |
6708bb27 | 3791 | if (!atomic_read(&cmd->transport_dev_active)) { |
a1d8b49a | 3792 | spin_unlock_irqrestore(&cmd->t_state_lock, flags); |
c66ac9db NB |
3793 | goto free_pages; |
3794 | } | |
a1d8b49a | 3795 | atomic_set(&cmd->transport_dev_active, 0); |
c66ac9db | 3796 | transport_all_task_dev_remove_state(cmd); |
a1d8b49a | 3797 | spin_unlock_irqrestore(&cmd->t_state_lock, flags); |
c66ac9db NB |
3798 | |
3799 | transport_release_tasks(cmd); | |
5951146d | 3800 | |
c66ac9db NB |
3801 | free_pages: |
3802 | transport_free_pages(cmd); | |
35462975 | 3803 | transport_release_cmd(cmd); |
c66ac9db NB |
3804 | return 0; |
3805 | } | |
3806 | ||
3807 | /* | |
ec98f782 AG |
3808 | * transport_generic_map_mem_to_cmd - Use fabric-alloced pages instead of |
3809 | * allocating in the core. | |
c66ac9db NB |
3810 | * @cmd: Associated se_cmd descriptor |
3811 | * @mem: SGL style memory for TCM WRITE / READ | |
3812 | * @sg_mem_num: Number of SGL elements | |
3813 | * @mem_bidi_in: SGL style memory for TCM BIDI READ | |
3814 | * @sg_mem_bidi_num: Number of BIDI READ SGL elements | |
3815 | * | |
3816 | * Return: nonzero return cmd was rejected for -ENOMEM or inproper usage | |
3817 | * of parameters. | |
3818 | */ | |
3819 | int transport_generic_map_mem_to_cmd( | |
3820 | struct se_cmd *cmd, | |
5951146d AG |
3821 | struct scatterlist *sgl, |
3822 | u32 sgl_count, | |
3823 | struct scatterlist *sgl_bidi, | |
3824 | u32 sgl_bidi_count) | |
c66ac9db | 3825 | { |
5951146d | 3826 | if (!sgl || !sgl_count) |
c66ac9db | 3827 | return 0; |
c66ac9db | 3828 | |
c66ac9db NB |
3829 | if ((cmd->se_cmd_flags & SCF_SCSI_DATA_SG_IO_CDB) || |
3830 | (cmd->se_cmd_flags & SCF_SCSI_CONTROL_SG_IO_CDB)) { | |
c66ac9db | 3831 | |
ec98f782 AG |
3832 | cmd->t_data_sg = sgl; |
3833 | cmd->t_data_nents = sgl_count; | |
c66ac9db | 3834 | |
ec98f782 AG |
3835 | if (sgl_bidi && sgl_bidi_count) { |
3836 | cmd->t_bidi_data_sg = sgl_bidi; | |
3837 | cmd->t_bidi_data_nents = sgl_bidi_count; | |
c66ac9db NB |
3838 | } |
3839 | cmd->se_cmd_flags |= SCF_PASSTHROUGH_SG_TO_MEM_NOALLOC; | |
c66ac9db NB |
3840 | } |
3841 | ||
3842 | return 0; | |
3843 | } | |
3844 | EXPORT_SYMBOL(transport_generic_map_mem_to_cmd); | |
3845 | ||
c66ac9db NB |
3846 | static int transport_new_cmd_obj(struct se_cmd *cmd) |
3847 | { | |
5951146d | 3848 | struct se_device *dev = cmd->se_dev; |
a1d8b49a AG |
3849 | u32 task_cdbs; |
3850 | u32 rc; | |
ec98f782 | 3851 | int set_counts = 1; |
c66ac9db | 3852 | |
ec98f782 AG |
3853 | /* |
3854 | * Setup any BIDI READ tasks and memory from | |
3855 | * cmd->t_mem_bidi_list so the READ struct se_tasks | |
3856 | * are queued first for the non pSCSI passthrough case. | |
3857 | */ | |
3858 | if (cmd->t_bidi_data_sg && | |
3859 | (dev->transport->transport_type != TRANSPORT_PLUGIN_PHBA_PDEV)) { | |
3860 | rc = transport_allocate_tasks(cmd, | |
3861 | cmd->t_task_lba, | |
3862 | DMA_FROM_DEVICE, | |
3863 | cmd->t_bidi_data_sg, | |
3864 | cmd->t_bidi_data_nents); | |
6708bb27 | 3865 | if (rc <= 0) { |
c66ac9db NB |
3866 | cmd->se_cmd_flags |= SCF_SCSI_CDB_EXCEPTION; |
3867 | cmd->scsi_sense_reason = | |
ec98f782 | 3868 | TCM_LOGICAL_UNIT_COMMUNICATION_FAILURE; |
c66ac9db NB |
3869 | return PYX_TRANSPORT_LU_COMM_FAILURE; |
3870 | } | |
ec98f782 AG |
3871 | atomic_inc(&cmd->t_fe_count); |
3872 | atomic_inc(&cmd->t_se_count); | |
3873 | set_counts = 0; | |
3874 | } | |
3875 | /* | |
3876 | * Setup the tasks and memory from cmd->t_mem_list | |
3877 | * Note for BIDI transfers this will contain the WRITE payload | |
3878 | */ | |
3879 | task_cdbs = transport_allocate_tasks(cmd, | |
3880 | cmd->t_task_lba, | |
3881 | cmd->data_direction, | |
3882 | cmd->t_data_sg, | |
3883 | cmd->t_data_nents); | |
6708bb27 | 3884 | if (task_cdbs <= 0) { |
ec98f782 AG |
3885 | cmd->se_cmd_flags |= SCF_SCSI_CDB_EXCEPTION; |
3886 | cmd->scsi_sense_reason = | |
3887 | TCM_LOGICAL_UNIT_COMMUNICATION_FAILURE; | |
3888 | return PYX_TRANSPORT_LU_COMM_FAILURE; | |
3889 | } | |
c66ac9db | 3890 | |
ec98f782 AG |
3891 | if (set_counts) { |
3892 | atomic_inc(&cmd->t_fe_count); | |
3893 | atomic_inc(&cmd->t_se_count); | |
c66ac9db NB |
3894 | } |
3895 | ||
ec98f782 AG |
3896 | cmd->t_task_list_num = task_cdbs; |
3897 | ||
a1d8b49a AG |
3898 | atomic_set(&cmd->t_task_cdbs_left, task_cdbs); |
3899 | atomic_set(&cmd->t_task_cdbs_ex_left, task_cdbs); | |
3900 | atomic_set(&cmd->t_task_cdbs_timeout_left, task_cdbs); | |
c66ac9db NB |
3901 | return 0; |
3902 | } | |
3903 | ||
05d1c7c0 AG |
3904 | void *transport_kmap_first_data_page(struct se_cmd *cmd) |
3905 | { | |
ec98f782 | 3906 | struct scatterlist *sg = cmd->t_data_sg; |
05d1c7c0 | 3907 | |
ec98f782 | 3908 | BUG_ON(!sg); |
05d1c7c0 | 3909 | /* |
ec98f782 AG |
3910 | * We need to take into account a possible offset here for fabrics like |
3911 | * tcm_loop who may be using a contig buffer from the SCSI midlayer for | |
3912 | * control CDBs passed as SGLs via transport_generic_map_mem_to_cmd() | |
05d1c7c0 | 3913 | */ |
ec98f782 | 3914 | return kmap(sg_page(sg)) + sg->offset; |
05d1c7c0 AG |
3915 | } |
3916 | EXPORT_SYMBOL(transport_kmap_first_data_page); | |
3917 | ||
3918 | void transport_kunmap_first_data_page(struct se_cmd *cmd) | |
3919 | { | |
ec98f782 | 3920 | kunmap(sg_page(cmd->t_data_sg)); |
05d1c7c0 AG |
3921 | } |
3922 | EXPORT_SYMBOL(transport_kunmap_first_data_page); | |
3923 | ||
c66ac9db | 3924 | static int |
05d1c7c0 | 3925 | transport_generic_get_mem(struct se_cmd *cmd) |
c66ac9db | 3926 | { |
ec98f782 AG |
3927 | u32 length = cmd->data_length; |
3928 | unsigned int nents; | |
3929 | struct page *page; | |
3930 | int i = 0; | |
c66ac9db | 3931 | |
ec98f782 AG |
3932 | nents = DIV_ROUND_UP(length, PAGE_SIZE); |
3933 | cmd->t_data_sg = kmalloc(sizeof(struct scatterlist) * nents, GFP_KERNEL); | |
3934 | if (!cmd->t_data_sg) | |
3935 | return -ENOMEM; | |
c66ac9db | 3936 | |
ec98f782 AG |
3937 | cmd->t_data_nents = nents; |
3938 | sg_init_table(cmd->t_data_sg, nents); | |
c66ac9db | 3939 | |
ec98f782 AG |
3940 | while (length) { |
3941 | u32 page_len = min_t(u32, length, PAGE_SIZE); | |
3942 | page = alloc_page(GFP_KERNEL | __GFP_ZERO); | |
3943 | if (!page) | |
3944 | goto out; | |
c66ac9db | 3945 | |
ec98f782 AG |
3946 | sg_set_page(&cmd->t_data_sg[i], page, page_len, 0); |
3947 | length -= page_len; | |
3948 | i++; | |
c66ac9db | 3949 | } |
c66ac9db | 3950 | return 0; |
c66ac9db | 3951 | |
ec98f782 AG |
3952 | out: |
3953 | while (i >= 0) { | |
3954 | __free_page(sg_page(&cmd->t_data_sg[i])); | |
3955 | i--; | |
c66ac9db | 3956 | } |
ec98f782 AG |
3957 | kfree(cmd->t_data_sg); |
3958 | cmd->t_data_sg = NULL; | |
3959 | return -ENOMEM; | |
c66ac9db NB |
3960 | } |
3961 | ||
a1d8b49a AG |
3962 | /* Reduce sectors if they are too long for the device */ |
3963 | static inline sector_t transport_limit_task_sectors( | |
c66ac9db NB |
3964 | struct se_device *dev, |
3965 | unsigned long long lba, | |
a1d8b49a | 3966 | sector_t sectors) |
c66ac9db | 3967 | { |
a1d8b49a | 3968 | sectors = min_t(sector_t, sectors, dev->se_sub_dev->se_dev_attrib.max_sectors); |
c66ac9db | 3969 | |
a1d8b49a AG |
3970 | if (dev->transport->get_device_type(dev) == TYPE_DISK) |
3971 | if ((lba + sectors) > transport_dev_end_lba(dev)) | |
3972 | sectors = ((transport_dev_end_lba(dev) - lba) + 1); | |
c66ac9db | 3973 | |
a1d8b49a | 3974 | return sectors; |
c66ac9db NB |
3975 | } |
3976 | ||
c66ac9db NB |
3977 | |
3978 | /* | |
3979 | * This function can be used by HW target mode drivers to create a linked | |
3980 | * scatterlist from all contiguously allocated struct se_task->task_sg[]. | |
3981 | * This is intended to be called during the completion path by TCM Core | |
3982 | * when struct target_core_fabric_ops->check_task_sg_chaining is enabled. | |
3983 | */ | |
3984 | void transport_do_task_sg_chain(struct se_cmd *cmd) | |
3985 | { | |
ec98f782 AG |
3986 | struct scatterlist *sg_first = NULL; |
3987 | struct scatterlist *sg_prev = NULL; | |
3988 | int sg_prev_nents = 0; | |
3989 | struct scatterlist *sg; | |
c66ac9db | 3990 | struct se_task *task; |
ec98f782 | 3991 | u32 chained_nents = 0; |
c66ac9db NB |
3992 | int i; |
3993 | ||
ec98f782 AG |
3994 | BUG_ON(!cmd->se_tfo->task_sg_chaining); |
3995 | ||
c66ac9db NB |
3996 | /* |
3997 | * Walk the struct se_task list and setup scatterlist chains | |
a1d8b49a | 3998 | * for each contiguously allocated struct se_task->task_sg[]. |
c66ac9db | 3999 | */ |
a1d8b49a | 4000 | list_for_each_entry(task, &cmd->t_task_list, t_list) { |
ec98f782 | 4001 | if (!task->task_sg) |
c66ac9db NB |
4002 | continue; |
4003 | ||
ec98f782 | 4004 | BUG_ON(!task->task_padded_sg); |
c66ac9db | 4005 | |
ec98f782 AG |
4006 | if (!sg_first) { |
4007 | sg_first = task->task_sg; | |
6708bb27 | 4008 | chained_nents = task->task_sg_nents; |
97868c89 | 4009 | } else { |
ec98f782 | 4010 | sg_chain(sg_prev, sg_prev_nents, task->task_sg); |
6708bb27 | 4011 | chained_nents += task->task_sg_nents; |
97868c89 | 4012 | } |
ec98f782 AG |
4013 | |
4014 | sg_prev = task->task_sg; | |
6708bb27 | 4015 | sg_prev_nents = task->task_sg_nents; |
c66ac9db NB |
4016 | } |
4017 | /* | |
4018 | * Setup the starting pointer and total t_tasks_sg_linked_no including | |
4019 | * padding SGs for linking and to mark the end. | |
4020 | */ | |
a1d8b49a | 4021 | cmd->t_tasks_sg_chained = sg_first; |
ec98f782 | 4022 | cmd->t_tasks_sg_chained_no = chained_nents; |
c66ac9db | 4023 | |
6708bb27 | 4024 | pr_debug("Setup cmd: %p cmd->t_tasks_sg_chained: %p and" |
a1d8b49a AG |
4025 | " t_tasks_sg_chained_no: %u\n", cmd, cmd->t_tasks_sg_chained, |
4026 | cmd->t_tasks_sg_chained_no); | |
c66ac9db | 4027 | |
a1d8b49a AG |
4028 | for_each_sg(cmd->t_tasks_sg_chained, sg, |
4029 | cmd->t_tasks_sg_chained_no, i) { | |
c66ac9db | 4030 | |
6708bb27 | 4031 | pr_debug("SG[%d]: %p page: %p length: %d offset: %d\n", |
5951146d | 4032 | i, sg, sg_page(sg), sg->length, sg->offset); |
c66ac9db | 4033 | if (sg_is_chain(sg)) |
6708bb27 | 4034 | pr_debug("SG: %p sg_is_chain=1\n", sg); |
c66ac9db | 4035 | if (sg_is_last(sg)) |
6708bb27 | 4036 | pr_debug("SG: %p sg_is_last=1\n", sg); |
c66ac9db | 4037 | } |
c66ac9db NB |
4038 | } |
4039 | EXPORT_SYMBOL(transport_do_task_sg_chain); | |
4040 | ||
a1d8b49a AG |
4041 | /* |
4042 | * Break up cmd into chunks transport can handle | |
4043 | */ | |
ec98f782 | 4044 | static int transport_allocate_data_tasks( |
c66ac9db NB |
4045 | struct se_cmd *cmd, |
4046 | unsigned long long lba, | |
c66ac9db | 4047 | enum dma_data_direction data_direction, |
ec98f782 AG |
4048 | struct scatterlist *sgl, |
4049 | unsigned int sgl_nents) | |
c66ac9db NB |
4050 | { |
4051 | unsigned char *cdb = NULL; | |
4052 | struct se_task *task; | |
5951146d | 4053 | struct se_device *dev = cmd->se_dev; |
ec98f782 | 4054 | unsigned long flags; |
1d20bb61 | 4055 | int task_count, i, ret; |
277c5f27 | 4056 | sector_t sectors, dev_max_sectors = dev->se_sub_dev->se_dev_attrib.max_sectors; |
ec98f782 AG |
4057 | u32 sector_size = dev->se_sub_dev->se_dev_attrib.block_size; |
4058 | struct scatterlist *sg; | |
4059 | struct scatterlist *cmd_sg; | |
a1d8b49a | 4060 | |
ec98f782 AG |
4061 | WARN_ON(cmd->data_length % sector_size); |
4062 | sectors = DIV_ROUND_UP(cmd->data_length, sector_size); | |
277c5f27 NB |
4063 | task_count = DIV_ROUND_UP_SECTOR_T(sectors, dev_max_sectors); |
4064 | ||
ec98f782 AG |
4065 | cmd_sg = sgl; |
4066 | for (i = 0; i < task_count; i++) { | |
4067 | unsigned int task_size; | |
4068 | int count; | |
a1d8b49a | 4069 | |
c66ac9db | 4070 | task = transport_generic_get_task(cmd, data_direction); |
a1d8b49a | 4071 | if (!task) |
ec98f782 | 4072 | return -ENOMEM; |
c66ac9db | 4073 | |
c66ac9db | 4074 | task->task_lba = lba; |
ec98f782 AG |
4075 | task->task_sectors = min(sectors, dev_max_sectors); |
4076 | task->task_size = task->task_sectors * sector_size; | |
c66ac9db | 4077 | |
e3d6f909 | 4078 | cdb = dev->transport->get_cdb(task); |
a1d8b49a AG |
4079 | BUG_ON(!cdb); |
4080 | ||
4081 | memcpy(cdb, cmd->t_task_cdb, | |
4082 | scsi_command_size(cmd->t_task_cdb)); | |
4083 | ||
4084 | /* Update new cdb with updated lba/sectors */ | |
3a867205 | 4085 | cmd->transport_split_cdb(task->task_lba, task->task_sectors, cdb); |
c66ac9db NB |
4086 | |
4087 | /* | |
ec98f782 AG |
4088 | * Check if the fabric module driver is requesting that all |
4089 | * struct se_task->task_sg[] be chained together.. If so, | |
4090 | * then allocate an extra padding SG entry for linking and | |
4091 | * marking the end of the chained SGL. | |
4092 | * Possibly over-allocate task sgl size by using cmd sgl size. | |
4093 | * It's so much easier and only a waste when task_count > 1. | |
4094 | * That is extremely rare. | |
c66ac9db | 4095 | */ |
6708bb27 | 4096 | task->task_sg_nents = sgl_nents; |
ec98f782 | 4097 | if (cmd->se_tfo->task_sg_chaining) { |
6708bb27 | 4098 | task->task_sg_nents++; |
ec98f782 AG |
4099 | task->task_padded_sg = 1; |
4100 | } | |
c66ac9db | 4101 | |
1d20bb61 | 4102 | task->task_sg = kmalloc(sizeof(struct scatterlist) * |
6708bb27 | 4103 | task->task_sg_nents, GFP_KERNEL); |
ec98f782 AG |
4104 | if (!task->task_sg) { |
4105 | cmd->se_dev->transport->free_task(task); | |
4106 | return -ENOMEM; | |
4107 | } | |
4108 | ||
6708bb27 | 4109 | sg_init_table(task->task_sg, task->task_sg_nents); |
c66ac9db | 4110 | |
ec98f782 AG |
4111 | task_size = task->task_size; |
4112 | ||
4113 | /* Build new sgl, only up to task_size */ | |
6708bb27 | 4114 | for_each_sg(task->task_sg, sg, task->task_sg_nents, count) { |
ec98f782 AG |
4115 | if (cmd_sg->length > task_size) |
4116 | break; | |
4117 | ||
4118 | *sg = *cmd_sg; | |
4119 | task_size -= cmd_sg->length; | |
4120 | cmd_sg = sg_next(cmd_sg); | |
c66ac9db | 4121 | } |
c66ac9db | 4122 | |
ec98f782 AG |
4123 | lba += task->task_sectors; |
4124 | sectors -= task->task_sectors; | |
c66ac9db | 4125 | |
ec98f782 AG |
4126 | spin_lock_irqsave(&cmd->t_state_lock, flags); |
4127 | list_add_tail(&task->t_list, &cmd->t_task_list); | |
4128 | spin_unlock_irqrestore(&cmd->t_state_lock, flags); | |
c66ac9db | 4129 | } |
1d20bb61 NB |
4130 | /* |
4131 | * Now perform the memory map of task->task_sg[] into backend | |
4132 | * subsystem memory.. | |
4133 | */ | |
4134 | list_for_each_entry(task, &cmd->t_task_list, t_list) { | |
4135 | if (atomic_read(&task->task_sent)) | |
4136 | continue; | |
4137 | if (!dev->transport->map_data_SG) | |
4138 | continue; | |
4139 | ||
4140 | ret = dev->transport->map_data_SG(task); | |
4141 | if (ret < 0) | |
4142 | return 0; | |
4143 | } | |
c66ac9db | 4144 | |
ec98f782 | 4145 | return task_count; |
c66ac9db NB |
4146 | } |
4147 | ||
4148 | static int | |
ec98f782 | 4149 | transport_allocate_control_task(struct se_cmd *cmd) |
c66ac9db | 4150 | { |
5951146d | 4151 | struct se_device *dev = cmd->se_dev; |
c66ac9db NB |
4152 | unsigned char *cdb; |
4153 | struct se_task *task; | |
ec98f782 | 4154 | unsigned long flags; |
6708bb27 | 4155 | int ret = 0; |
c66ac9db NB |
4156 | |
4157 | task = transport_generic_get_task(cmd, cmd->data_direction); | |
4158 | if (!task) | |
ec98f782 | 4159 | return -ENOMEM; |
c66ac9db | 4160 | |
e3d6f909 | 4161 | cdb = dev->transport->get_cdb(task); |
a1d8b49a AG |
4162 | BUG_ON(!cdb); |
4163 | memcpy(cdb, cmd->t_task_cdb, | |
4164 | scsi_command_size(cmd->t_task_cdb)); | |
c66ac9db | 4165 | |
ec98f782 AG |
4166 | task->task_sg = kmalloc(sizeof(struct scatterlist) * cmd->t_data_nents, |
4167 | GFP_KERNEL); | |
4168 | if (!task->task_sg) { | |
4169 | cmd->se_dev->transport->free_task(task); | |
4170 | return -ENOMEM; | |
4171 | } | |
4172 | ||
4173 | memcpy(task->task_sg, cmd->t_data_sg, | |
4174 | sizeof(struct scatterlist) * cmd->t_data_nents); | |
c66ac9db | 4175 | task->task_size = cmd->data_length; |
6708bb27 | 4176 | task->task_sg_nents = cmd->t_data_nents; |
c66ac9db | 4177 | |
ec98f782 AG |
4178 | spin_lock_irqsave(&cmd->t_state_lock, flags); |
4179 | list_add_tail(&task->t_list, &cmd->t_task_list); | |
4180 | spin_unlock_irqrestore(&cmd->t_state_lock, flags); | |
c66ac9db NB |
4181 | |
4182 | if (cmd->se_cmd_flags & SCF_SCSI_CONTROL_SG_IO_CDB) { | |
1d20bb61 NB |
4183 | if (dev->transport->map_control_SG) |
4184 | ret = dev->transport->map_control_SG(task); | |
c66ac9db NB |
4185 | } else if (cmd->se_cmd_flags & SCF_SCSI_NON_DATA_CDB) { |
4186 | if (dev->transport->cdb_none) | |
6708bb27 | 4187 | ret = dev->transport->cdb_none(task); |
c66ac9db | 4188 | } else { |
6708bb27 | 4189 | pr_err("target: Unknown control cmd type!\n"); |
c66ac9db | 4190 | BUG(); |
ec98f782 | 4191 | } |
6708bb27 AG |
4192 | |
4193 | /* Success! Return number of tasks allocated */ | |
4194 | if (ret == 0) | |
4195 | return 1; | |
4196 | return ret; | |
ec98f782 AG |
4197 | } |
4198 | ||
4199 | static u32 transport_allocate_tasks( | |
4200 | struct se_cmd *cmd, | |
4201 | unsigned long long lba, | |
4202 | enum dma_data_direction data_direction, | |
4203 | struct scatterlist *sgl, | |
4204 | unsigned int sgl_nents) | |
4205 | { | |
6708bb27 | 4206 | if (cmd->se_cmd_flags & SCF_SCSI_DATA_SG_IO_CDB) |
ec98f782 AG |
4207 | return transport_allocate_data_tasks(cmd, lba, data_direction, |
4208 | sgl, sgl_nents); | |
6708bb27 AG |
4209 | else |
4210 | return transport_allocate_control_task(cmd); | |
4211 | ||
c66ac9db NB |
4212 | } |
4213 | ||
ec98f782 | 4214 | |
c66ac9db NB |
4215 | /* transport_generic_new_cmd(): Called from transport_processing_thread() |
4216 | * | |
4217 | * Allocate storage transport resources from a set of values predefined | |
4218 | * by transport_generic_cmd_sequencer() from the iSCSI Target RX process. | |
4219 | * Any non zero return here is treated as an "out of resource' op here. | |
4220 | */ | |
4221 | /* | |
4222 | * Generate struct se_task(s) and/or their payloads for this CDB. | |
4223 | */ | |
a1d8b49a | 4224 | int transport_generic_new_cmd(struct se_cmd *cmd) |
c66ac9db | 4225 | { |
c66ac9db NB |
4226 | int ret = 0; |
4227 | ||
4228 | /* | |
4229 | * Determine is the TCM fabric module has already allocated physical | |
4230 | * memory, and is directly calling transport_generic_map_mem_to_cmd() | |
ec98f782 | 4231 | * beforehand. |
c66ac9db | 4232 | */ |
ec98f782 AG |
4233 | if (!(cmd->se_cmd_flags & SCF_PASSTHROUGH_SG_TO_MEM_NOALLOC) && |
4234 | cmd->data_length) { | |
05d1c7c0 | 4235 | ret = transport_generic_get_mem(cmd); |
c66ac9db NB |
4236 | if (ret < 0) |
4237 | return ret; | |
4238 | } | |
1d20bb61 NB |
4239 | /* |
4240 | * Call transport_new_cmd_obj() to invoke transport_allocate_tasks() for | |
4241 | * control or data CDB types, and perform the map to backend subsystem | |
4242 | * code from SGL memory allocated here by transport_generic_get_mem(), or | |
4243 | * via pre-existing SGL memory setup explictly by fabric module code with | |
4244 | * transport_generic_map_mem_to_cmd(). | |
4245 | */ | |
c66ac9db NB |
4246 | ret = transport_new_cmd_obj(cmd); |
4247 | if (ret < 0) | |
4248 | return ret; | |
c66ac9db | 4249 | /* |
a1d8b49a | 4250 | * For WRITEs, let the fabric know its buffer is ready.. |
c66ac9db NB |
4251 | * This WRITE struct se_cmd (and all of its associated struct se_task's) |
4252 | * will be added to the struct se_device execution queue after its WRITE | |
4253 | * data has arrived. (ie: It gets handled by the transport processing | |
4254 | * thread a second time) | |
4255 | */ | |
4256 | if (cmd->data_direction == DMA_TO_DEVICE) { | |
4257 | transport_add_tasks_to_state_queue(cmd); | |
4258 | return transport_generic_write_pending(cmd); | |
4259 | } | |
4260 | /* | |
4261 | * Everything else but a WRITE, add the struct se_cmd's struct se_task's | |
4262 | * to the execution queue. | |
4263 | */ | |
4264 | transport_execute_tasks(cmd); | |
4265 | return 0; | |
4266 | } | |
a1d8b49a | 4267 | EXPORT_SYMBOL(transport_generic_new_cmd); |
c66ac9db NB |
4268 | |
4269 | /* transport_generic_process_write(): | |
4270 | * | |
4271 | * | |
4272 | */ | |
4273 | void transport_generic_process_write(struct se_cmd *cmd) | |
4274 | { | |
c66ac9db NB |
4275 | transport_execute_tasks(cmd); |
4276 | } | |
4277 | EXPORT_SYMBOL(transport_generic_process_write); | |
4278 | ||
07bde79a NB |
4279 | static int transport_write_pending_qf(struct se_cmd *cmd) |
4280 | { | |
4281 | return cmd->se_tfo->write_pending(cmd); | |
4282 | } | |
4283 | ||
c66ac9db NB |
4284 | /* transport_generic_write_pending(): |
4285 | * | |
4286 | * | |
4287 | */ | |
4288 | static int transport_generic_write_pending(struct se_cmd *cmd) | |
4289 | { | |
4290 | unsigned long flags; | |
4291 | int ret; | |
4292 | ||
a1d8b49a | 4293 | spin_lock_irqsave(&cmd->t_state_lock, flags); |
c66ac9db | 4294 | cmd->t_state = TRANSPORT_WRITE_PENDING; |
a1d8b49a | 4295 | spin_unlock_irqrestore(&cmd->t_state_lock, flags); |
07bde79a NB |
4296 | |
4297 | if (cmd->transport_qf_callback) { | |
4298 | ret = cmd->transport_qf_callback(cmd); | |
4299 | if (ret == -EAGAIN) | |
4300 | goto queue_full; | |
4301 | else if (ret < 0) | |
4302 | return ret; | |
4303 | ||
4304 | cmd->transport_qf_callback = NULL; | |
4305 | return 0; | |
4306 | } | |
05d1c7c0 | 4307 | |
c66ac9db NB |
4308 | /* |
4309 | * Clear the se_cmd for WRITE_PENDING status in order to set | |
a1d8b49a | 4310 | * cmd->t_transport_active=0 so that transport_generic_handle_data |
c66ac9db | 4311 | * can be called from HW target mode interrupt code. This is safe |
e3d6f909 | 4312 | * to be called with transport_off=1 before the cmd->se_tfo->write_pending |
c66ac9db NB |
4313 | * because the se_cmd->se_lun pointer is not being cleared. |
4314 | */ | |
4315 | transport_cmd_check_stop(cmd, 1, 0); | |
4316 | ||
4317 | /* | |
4318 | * Call the fabric write_pending function here to let the | |
4319 | * frontend know that WRITE buffers are ready. | |
4320 | */ | |
e3d6f909 | 4321 | ret = cmd->se_tfo->write_pending(cmd); |
07bde79a NB |
4322 | if (ret == -EAGAIN) |
4323 | goto queue_full; | |
4324 | else if (ret < 0) | |
c66ac9db NB |
4325 | return ret; |
4326 | ||
4327 | return PYX_TRANSPORT_WRITE_PENDING; | |
07bde79a NB |
4328 | |
4329 | queue_full: | |
6708bb27 | 4330 | pr_debug("Handling write_pending QUEUE__FULL: se_cmd: %p\n", cmd); |
07bde79a NB |
4331 | cmd->t_state = TRANSPORT_COMPLETE_QF_WP; |
4332 | transport_handle_queue_full(cmd, cmd->se_dev, | |
4333 | transport_write_pending_qf); | |
4334 | return ret; | |
c66ac9db NB |
4335 | } |
4336 | ||
35462975 | 4337 | void transport_release_cmd(struct se_cmd *cmd) |
c66ac9db | 4338 | { |
e3d6f909 | 4339 | BUG_ON(!cmd->se_tfo); |
c66ac9db NB |
4340 | |
4341 | transport_free_se_cmd(cmd); | |
35462975 | 4342 | cmd->se_tfo->release_cmd(cmd); |
c66ac9db | 4343 | } |
35462975 | 4344 | EXPORT_SYMBOL(transport_release_cmd); |
c66ac9db NB |
4345 | |
4346 | /* transport_generic_free_cmd(): | |
4347 | * | |
4348 | * Called from processing frontend to release storage engine resources | |
4349 | */ | |
4350 | void transport_generic_free_cmd( | |
4351 | struct se_cmd *cmd, | |
4352 | int wait_for_tasks, | |
c66ac9db NB |
4353 | int session_reinstatement) |
4354 | { | |
5951146d | 4355 | if (!(cmd->se_cmd_flags & SCF_SE_LUN_CMD)) |
35462975 | 4356 | transport_release_cmd(cmd); |
c66ac9db NB |
4357 | else { |
4358 | core_dec_lacl_count(cmd->se_sess->se_node_acl, cmd); | |
4359 | ||
e3d6f909 | 4360 | if (cmd->se_lun) { |
c66ac9db | 4361 | #if 0 |
6708bb27 | 4362 | pr_debug("cmd: %p ITT: 0x%08x contains" |
e3d6f909 AG |
4363 | " cmd->se_lun\n", cmd, |
4364 | cmd->se_tfo->get_task_tag(cmd)); | |
c66ac9db NB |
4365 | #endif |
4366 | transport_lun_remove_cmd(cmd); | |
4367 | } | |
4368 | ||
4369 | if (wait_for_tasks && cmd->transport_wait_for_tasks) | |
4370 | cmd->transport_wait_for_tasks(cmd, 0, 0); | |
4371 | ||
f4366772 NB |
4372 | transport_free_dev_tasks(cmd); |
4373 | ||
35462975 | 4374 | transport_generic_remove(cmd, session_reinstatement); |
c66ac9db NB |
4375 | } |
4376 | } | |
4377 | EXPORT_SYMBOL(transport_generic_free_cmd); | |
4378 | ||
4379 | static void transport_nop_wait_for_tasks( | |
4380 | struct se_cmd *cmd, | |
4381 | int remove_cmd, | |
4382 | int session_reinstatement) | |
4383 | { | |
4384 | return; | |
4385 | } | |
4386 | ||
4387 | /* transport_lun_wait_for_tasks(): | |
4388 | * | |
4389 | * Called from ConfigFS context to stop the passed struct se_cmd to allow | |
4390 | * an struct se_lun to be successfully shutdown. | |
4391 | */ | |
4392 | static int transport_lun_wait_for_tasks(struct se_cmd *cmd, struct se_lun *lun) | |
4393 | { | |
4394 | unsigned long flags; | |
4395 | int ret; | |
4396 | /* | |
4397 | * If the frontend has already requested this struct se_cmd to | |
4398 | * be stopped, we can safely ignore this struct se_cmd. | |
4399 | */ | |
a1d8b49a AG |
4400 | spin_lock_irqsave(&cmd->t_state_lock, flags); |
4401 | if (atomic_read(&cmd->t_transport_stop)) { | |
4402 | atomic_set(&cmd->transport_lun_stop, 0); | |
6708bb27 | 4403 | pr_debug("ConfigFS ITT[0x%08x] - t_transport_stop ==" |
e3d6f909 | 4404 | " TRUE, skipping\n", cmd->se_tfo->get_task_tag(cmd)); |
a1d8b49a | 4405 | spin_unlock_irqrestore(&cmd->t_state_lock, flags); |
c66ac9db | 4406 | transport_cmd_check_stop(cmd, 1, 0); |
e3d6f909 | 4407 | return -EPERM; |
c66ac9db | 4408 | } |
a1d8b49a AG |
4409 | atomic_set(&cmd->transport_lun_fe_stop, 1); |
4410 | spin_unlock_irqrestore(&cmd->t_state_lock, flags); | |
c66ac9db | 4411 | |
5951146d | 4412 | wake_up_interruptible(&cmd->se_dev->dev_queue_obj.thread_wq); |
c66ac9db NB |
4413 | |
4414 | ret = transport_stop_tasks_for_cmd(cmd); | |
4415 | ||
6708bb27 AG |
4416 | pr_debug("ConfigFS: cmd: %p t_tasks: %d stop tasks ret:" |
4417 | " %d\n", cmd, cmd->t_task_list_num, ret); | |
c66ac9db | 4418 | if (!ret) { |
6708bb27 | 4419 | pr_debug("ConfigFS: ITT[0x%08x] - stopping cmd....\n", |
e3d6f909 | 4420 | cmd->se_tfo->get_task_tag(cmd)); |
a1d8b49a | 4421 | wait_for_completion(&cmd->transport_lun_stop_comp); |
6708bb27 | 4422 | pr_debug("ConfigFS: ITT[0x%08x] - stopped cmd....\n", |
e3d6f909 | 4423 | cmd->se_tfo->get_task_tag(cmd)); |
c66ac9db | 4424 | } |
5951146d | 4425 | transport_remove_cmd_from_queue(cmd, &cmd->se_dev->dev_queue_obj); |
c66ac9db NB |
4426 | |
4427 | return 0; | |
4428 | } | |
4429 | ||
c66ac9db NB |
4430 | static void __transport_clear_lun_from_sessions(struct se_lun *lun) |
4431 | { | |
4432 | struct se_cmd *cmd = NULL; | |
4433 | unsigned long lun_flags, cmd_flags; | |
4434 | /* | |
4435 | * Do exception processing and return CHECK_CONDITION status to the | |
4436 | * Initiator Port. | |
4437 | */ | |
4438 | spin_lock_irqsave(&lun->lun_cmd_lock, lun_flags); | |
5951146d AG |
4439 | while (!list_empty(&lun->lun_cmd_list)) { |
4440 | cmd = list_first_entry(&lun->lun_cmd_list, | |
4441 | struct se_cmd, se_lun_node); | |
4442 | list_del(&cmd->se_lun_node); | |
4443 | ||
a1d8b49a | 4444 | atomic_set(&cmd->transport_lun_active, 0); |
c66ac9db NB |
4445 | /* |
4446 | * This will notify iscsi_target_transport.c: | |
4447 | * transport_cmd_check_stop() that a LUN shutdown is in | |
4448 | * progress for the iscsi_cmd_t. | |
4449 | */ | |
a1d8b49a | 4450 | spin_lock(&cmd->t_state_lock); |
6708bb27 | 4451 | pr_debug("SE_LUN[%d] - Setting cmd->transport" |
c66ac9db | 4452 | "_lun_stop for ITT: 0x%08x\n", |
e3d6f909 AG |
4453 | cmd->se_lun->unpacked_lun, |
4454 | cmd->se_tfo->get_task_tag(cmd)); | |
a1d8b49a AG |
4455 | atomic_set(&cmd->transport_lun_stop, 1); |
4456 | spin_unlock(&cmd->t_state_lock); | |
c66ac9db NB |
4457 | |
4458 | spin_unlock_irqrestore(&lun->lun_cmd_lock, lun_flags); | |
4459 | ||
6708bb27 AG |
4460 | if (!cmd->se_lun) { |
4461 | pr_err("ITT: 0x%08x, [i,t]_state: %u/%u\n", | |
e3d6f909 AG |
4462 | cmd->se_tfo->get_task_tag(cmd), |
4463 | cmd->se_tfo->get_cmd_state(cmd), cmd->t_state); | |
c66ac9db NB |
4464 | BUG(); |
4465 | } | |
4466 | /* | |
4467 | * If the Storage engine still owns the iscsi_cmd_t, determine | |
4468 | * and/or stop its context. | |
4469 | */ | |
6708bb27 | 4470 | pr_debug("SE_LUN[%d] - ITT: 0x%08x before transport" |
e3d6f909 AG |
4471 | "_lun_wait_for_tasks()\n", cmd->se_lun->unpacked_lun, |
4472 | cmd->se_tfo->get_task_tag(cmd)); | |
c66ac9db | 4473 | |
e3d6f909 | 4474 | if (transport_lun_wait_for_tasks(cmd, cmd->se_lun) < 0) { |
c66ac9db NB |
4475 | spin_lock_irqsave(&lun->lun_cmd_lock, lun_flags); |
4476 | continue; | |
4477 | } | |
4478 | ||
6708bb27 | 4479 | pr_debug("SE_LUN[%d] - ITT: 0x%08x after transport_lun" |
c66ac9db | 4480 | "_wait_for_tasks(): SUCCESS\n", |
e3d6f909 AG |
4481 | cmd->se_lun->unpacked_lun, |
4482 | cmd->se_tfo->get_task_tag(cmd)); | |
c66ac9db | 4483 | |
a1d8b49a | 4484 | spin_lock_irqsave(&cmd->t_state_lock, cmd_flags); |
6708bb27 | 4485 | if (!atomic_read(&cmd->transport_dev_active)) { |
a1d8b49a | 4486 | spin_unlock_irqrestore(&cmd->t_state_lock, cmd_flags); |
c66ac9db NB |
4487 | goto check_cond; |
4488 | } | |
a1d8b49a | 4489 | atomic_set(&cmd->transport_dev_active, 0); |
c66ac9db | 4490 | transport_all_task_dev_remove_state(cmd); |
a1d8b49a | 4491 | spin_unlock_irqrestore(&cmd->t_state_lock, cmd_flags); |
c66ac9db NB |
4492 | |
4493 | transport_free_dev_tasks(cmd); | |
4494 | /* | |
4495 | * The Storage engine stopped this struct se_cmd before it was | |
4496 | * send to the fabric frontend for delivery back to the | |
4497 | * Initiator Node. Return this SCSI CDB back with an | |
4498 | * CHECK_CONDITION status. | |
4499 | */ | |
4500 | check_cond: | |
4501 | transport_send_check_condition_and_sense(cmd, | |
4502 | TCM_NON_EXISTENT_LUN, 0); | |
4503 | /* | |
4504 | * If the fabric frontend is waiting for this iscsi_cmd_t to | |
4505 | * be released, notify the waiting thread now that LU has | |
4506 | * finished accessing it. | |
4507 | */ | |
a1d8b49a AG |
4508 | spin_lock_irqsave(&cmd->t_state_lock, cmd_flags); |
4509 | if (atomic_read(&cmd->transport_lun_fe_stop)) { | |
6708bb27 | 4510 | pr_debug("SE_LUN[%d] - Detected FE stop for" |
c66ac9db NB |
4511 | " struct se_cmd: %p ITT: 0x%08x\n", |
4512 | lun->unpacked_lun, | |
e3d6f909 | 4513 | cmd, cmd->se_tfo->get_task_tag(cmd)); |
c66ac9db | 4514 | |
a1d8b49a | 4515 | spin_unlock_irqrestore(&cmd->t_state_lock, |
c66ac9db NB |
4516 | cmd_flags); |
4517 | transport_cmd_check_stop(cmd, 1, 0); | |
a1d8b49a | 4518 | complete(&cmd->transport_lun_fe_stop_comp); |
c66ac9db NB |
4519 | spin_lock_irqsave(&lun->lun_cmd_lock, lun_flags); |
4520 | continue; | |
4521 | } | |
6708bb27 | 4522 | pr_debug("SE_LUN[%d] - ITT: 0x%08x finished processing\n", |
e3d6f909 | 4523 | lun->unpacked_lun, cmd->se_tfo->get_task_tag(cmd)); |
c66ac9db | 4524 | |
a1d8b49a | 4525 | spin_unlock_irqrestore(&cmd->t_state_lock, cmd_flags); |
c66ac9db NB |
4526 | spin_lock_irqsave(&lun->lun_cmd_lock, lun_flags); |
4527 | } | |
4528 | spin_unlock_irqrestore(&lun->lun_cmd_lock, lun_flags); | |
4529 | } | |
4530 | ||
4531 | static int transport_clear_lun_thread(void *p) | |
4532 | { | |
4533 | struct se_lun *lun = (struct se_lun *)p; | |
4534 | ||
4535 | __transport_clear_lun_from_sessions(lun); | |
4536 | complete(&lun->lun_shutdown_comp); | |
4537 | ||
4538 | return 0; | |
4539 | } | |
4540 | ||
4541 | int transport_clear_lun_from_sessions(struct se_lun *lun) | |
4542 | { | |
4543 | struct task_struct *kt; | |
4544 | ||
5951146d | 4545 | kt = kthread_run(transport_clear_lun_thread, lun, |
c66ac9db NB |
4546 | "tcm_cl_%u", lun->unpacked_lun); |
4547 | if (IS_ERR(kt)) { | |
6708bb27 | 4548 | pr_err("Unable to start clear_lun thread\n"); |
e3d6f909 | 4549 | return PTR_ERR(kt); |
c66ac9db NB |
4550 | } |
4551 | wait_for_completion(&lun->lun_shutdown_comp); | |
4552 | ||
4553 | return 0; | |
4554 | } | |
4555 | ||
4556 | /* transport_generic_wait_for_tasks(): | |
4557 | * | |
4558 | * Called from frontend or passthrough context to wait for storage engine | |
4559 | * to pause and/or release frontend generated struct se_cmd. | |
4560 | */ | |
4561 | static void transport_generic_wait_for_tasks( | |
4562 | struct se_cmd *cmd, | |
4563 | int remove_cmd, | |
4564 | int session_reinstatement) | |
4565 | { | |
4566 | unsigned long flags; | |
4567 | ||
4568 | if (!(cmd->se_cmd_flags & SCF_SE_LUN_CMD) && !(cmd->se_tmr_req)) | |
4569 | return; | |
4570 | ||
a1d8b49a | 4571 | spin_lock_irqsave(&cmd->t_state_lock, flags); |
c66ac9db NB |
4572 | /* |
4573 | * If we are already stopped due to an external event (ie: LUN shutdown) | |
4574 | * sleep until the connection can have the passed struct se_cmd back. | |
a1d8b49a | 4575 | * The cmd->transport_lun_stopped_sem will be upped by |
c66ac9db NB |
4576 | * transport_clear_lun_from_sessions() once the ConfigFS context caller |
4577 | * has completed its operation on the struct se_cmd. | |
4578 | */ | |
a1d8b49a | 4579 | if (atomic_read(&cmd->transport_lun_stop)) { |
c66ac9db | 4580 | |
6708bb27 | 4581 | pr_debug("wait_for_tasks: Stopping" |
e3d6f909 | 4582 | " wait_for_completion(&cmd->t_tasktransport_lun_fe" |
c66ac9db | 4583 | "_stop_comp); for ITT: 0x%08x\n", |
e3d6f909 | 4584 | cmd->se_tfo->get_task_tag(cmd)); |
c66ac9db NB |
4585 | /* |
4586 | * There is a special case for WRITES where a FE exception + | |
4587 | * LUN shutdown means ConfigFS context is still sleeping on | |
4588 | * transport_lun_stop_comp in transport_lun_wait_for_tasks(). | |
4589 | * We go ahead and up transport_lun_stop_comp just to be sure | |
4590 | * here. | |
4591 | */ | |
a1d8b49a AG |
4592 | spin_unlock_irqrestore(&cmd->t_state_lock, flags); |
4593 | complete(&cmd->transport_lun_stop_comp); | |
4594 | wait_for_completion(&cmd->transport_lun_fe_stop_comp); | |
4595 | spin_lock_irqsave(&cmd->t_state_lock, flags); | |
c66ac9db NB |
4596 | |
4597 | transport_all_task_dev_remove_state(cmd); | |
4598 | /* | |
4599 | * At this point, the frontend who was the originator of this | |
4600 | * struct se_cmd, now owns the structure and can be released through | |
4601 | * normal means below. | |
4602 | */ | |
6708bb27 | 4603 | pr_debug("wait_for_tasks: Stopped" |
e3d6f909 | 4604 | " wait_for_completion(&cmd->t_tasktransport_lun_fe_" |
c66ac9db | 4605 | "stop_comp); for ITT: 0x%08x\n", |
e3d6f909 | 4606 | cmd->se_tfo->get_task_tag(cmd)); |
c66ac9db | 4607 | |
a1d8b49a | 4608 | atomic_set(&cmd->transport_lun_stop, 0); |
c66ac9db | 4609 | } |
a1d8b49a AG |
4610 | if (!atomic_read(&cmd->t_transport_active) || |
4611 | atomic_read(&cmd->t_transport_aborted)) | |
c66ac9db NB |
4612 | goto remove; |
4613 | ||
a1d8b49a | 4614 | atomic_set(&cmd->t_transport_stop, 1); |
c66ac9db | 4615 | |
6708bb27 | 4616 | pr_debug("wait_for_tasks: Stopping %p ITT: 0x%08x" |
c66ac9db | 4617 | " i_state: %d, t_state/def_t_state: %d/%d, t_transport_stop" |
e3d6f909 AG |
4618 | " = TRUE\n", cmd, cmd->se_tfo->get_task_tag(cmd), |
4619 | cmd->se_tfo->get_cmd_state(cmd), cmd->t_state, | |
c66ac9db NB |
4620 | cmd->deferred_t_state); |
4621 | ||
a1d8b49a | 4622 | spin_unlock_irqrestore(&cmd->t_state_lock, flags); |
c66ac9db | 4623 | |
5951146d | 4624 | wake_up_interruptible(&cmd->se_dev->dev_queue_obj.thread_wq); |
c66ac9db | 4625 | |
a1d8b49a | 4626 | wait_for_completion(&cmd->t_transport_stop_comp); |
c66ac9db | 4627 | |
a1d8b49a AG |
4628 | spin_lock_irqsave(&cmd->t_state_lock, flags); |
4629 | atomic_set(&cmd->t_transport_active, 0); | |
4630 | atomic_set(&cmd->t_transport_stop, 0); | |
c66ac9db | 4631 | |
6708bb27 | 4632 | pr_debug("wait_for_tasks: Stopped wait_for_compltion(" |
a1d8b49a | 4633 | "&cmd->t_transport_stop_comp) for ITT: 0x%08x\n", |
e3d6f909 | 4634 | cmd->se_tfo->get_task_tag(cmd)); |
c66ac9db | 4635 | remove: |
a1d8b49a | 4636 | spin_unlock_irqrestore(&cmd->t_state_lock, flags); |
c66ac9db NB |
4637 | if (!remove_cmd) |
4638 | return; | |
4639 | ||
35462975 | 4640 | transport_generic_free_cmd(cmd, 0, session_reinstatement); |
c66ac9db NB |
4641 | } |
4642 | ||
4643 | static int transport_get_sense_codes( | |
4644 | struct se_cmd *cmd, | |
4645 | u8 *asc, | |
4646 | u8 *ascq) | |
4647 | { | |
4648 | *asc = cmd->scsi_asc; | |
4649 | *ascq = cmd->scsi_ascq; | |
4650 | ||
4651 | return 0; | |
4652 | } | |
4653 | ||
4654 | static int transport_set_sense_codes( | |
4655 | struct se_cmd *cmd, | |
4656 | u8 asc, | |
4657 | u8 ascq) | |
4658 | { | |
4659 | cmd->scsi_asc = asc; | |
4660 | cmd->scsi_ascq = ascq; | |
4661 | ||
4662 | return 0; | |
4663 | } | |
4664 | ||
4665 | int transport_send_check_condition_and_sense( | |
4666 | struct se_cmd *cmd, | |
4667 | u8 reason, | |
4668 | int from_transport) | |
4669 | { | |
4670 | unsigned char *buffer = cmd->sense_buffer; | |
4671 | unsigned long flags; | |
4672 | int offset; | |
4673 | u8 asc = 0, ascq = 0; | |
4674 | ||
a1d8b49a | 4675 | spin_lock_irqsave(&cmd->t_state_lock, flags); |
c66ac9db | 4676 | if (cmd->se_cmd_flags & SCF_SENT_CHECK_CONDITION) { |
a1d8b49a | 4677 | spin_unlock_irqrestore(&cmd->t_state_lock, flags); |
c66ac9db NB |
4678 | return 0; |
4679 | } | |
4680 | cmd->se_cmd_flags |= SCF_SENT_CHECK_CONDITION; | |
a1d8b49a | 4681 | spin_unlock_irqrestore(&cmd->t_state_lock, flags); |
c66ac9db NB |
4682 | |
4683 | if (!reason && from_transport) | |
4684 | goto after_reason; | |
4685 | ||
4686 | if (!from_transport) | |
4687 | cmd->se_cmd_flags |= SCF_EMULATED_TASK_SENSE; | |
4688 | /* | |
4689 | * Data Segment and SenseLength of the fabric response PDU. | |
4690 | * | |
4691 | * TRANSPORT_SENSE_BUFFER is now set to SCSI_SENSE_BUFFERSIZE | |
4692 | * from include/scsi/scsi_cmnd.h | |
4693 | */ | |
e3d6f909 | 4694 | offset = cmd->se_tfo->set_fabric_sense_len(cmd, |
c66ac9db NB |
4695 | TRANSPORT_SENSE_BUFFER); |
4696 | /* | |
4697 | * Actual SENSE DATA, see SPC-3 7.23.2 SPC_SENSE_KEY_OFFSET uses | |
4698 | * SENSE KEY values from include/scsi/scsi.h | |
4699 | */ | |
4700 | switch (reason) { | |
4701 | case TCM_NON_EXISTENT_LUN: | |
4702 | case TCM_UNSUPPORTED_SCSI_OPCODE: | |
4703 | case TCM_SECTOR_COUNT_TOO_MANY: | |
4704 | /* CURRENT ERROR */ | |
4705 | buffer[offset] = 0x70; | |
4706 | /* ILLEGAL REQUEST */ | |
4707 | buffer[offset+SPC_SENSE_KEY_OFFSET] = ILLEGAL_REQUEST; | |
4708 | /* INVALID COMMAND OPERATION CODE */ | |
4709 | buffer[offset+SPC_ASC_KEY_OFFSET] = 0x20; | |
4710 | break; | |
4711 | case TCM_UNKNOWN_MODE_PAGE: | |
4712 | /* CURRENT ERROR */ | |
4713 | buffer[offset] = 0x70; | |
4714 | /* ILLEGAL REQUEST */ | |
4715 | buffer[offset+SPC_SENSE_KEY_OFFSET] = ILLEGAL_REQUEST; | |
4716 | /* INVALID FIELD IN CDB */ | |
4717 | buffer[offset+SPC_ASC_KEY_OFFSET] = 0x24; | |
4718 | break; | |
4719 | case TCM_CHECK_CONDITION_ABORT_CMD: | |
4720 | /* CURRENT ERROR */ | |
4721 | buffer[offset] = 0x70; | |
4722 | /* ABORTED COMMAND */ | |
4723 | buffer[offset+SPC_SENSE_KEY_OFFSET] = ABORTED_COMMAND; | |
4724 | /* BUS DEVICE RESET FUNCTION OCCURRED */ | |
4725 | buffer[offset+SPC_ASC_KEY_OFFSET] = 0x29; | |
4726 | buffer[offset+SPC_ASCQ_KEY_OFFSET] = 0x03; | |
4727 | break; | |
4728 | case TCM_INCORRECT_AMOUNT_OF_DATA: | |
4729 | /* CURRENT ERROR */ | |
4730 | buffer[offset] = 0x70; | |
4731 | /* ABORTED COMMAND */ | |
4732 | buffer[offset+SPC_SENSE_KEY_OFFSET] = ABORTED_COMMAND; | |
4733 | /* WRITE ERROR */ | |
4734 | buffer[offset+SPC_ASC_KEY_OFFSET] = 0x0c; | |
4735 | /* NOT ENOUGH UNSOLICITED DATA */ | |
4736 | buffer[offset+SPC_ASCQ_KEY_OFFSET] = 0x0d; | |
4737 | break; | |
4738 | case TCM_INVALID_CDB_FIELD: | |
4739 | /* CURRENT ERROR */ | |
4740 | buffer[offset] = 0x70; | |
4741 | /* ABORTED COMMAND */ | |
4742 | buffer[offset+SPC_SENSE_KEY_OFFSET] = ABORTED_COMMAND; | |
4743 | /* INVALID FIELD IN CDB */ | |
4744 | buffer[offset+SPC_ASC_KEY_OFFSET] = 0x24; | |
4745 | break; | |
4746 | case TCM_INVALID_PARAMETER_LIST: | |
4747 | /* CURRENT ERROR */ | |
4748 | buffer[offset] = 0x70; | |
4749 | /* ABORTED COMMAND */ | |
4750 | buffer[offset+SPC_SENSE_KEY_OFFSET] = ABORTED_COMMAND; | |
4751 | /* INVALID FIELD IN PARAMETER LIST */ | |
4752 | buffer[offset+SPC_ASC_KEY_OFFSET] = 0x26; | |
4753 | break; | |
4754 | case TCM_UNEXPECTED_UNSOLICITED_DATA: | |
4755 | /* CURRENT ERROR */ | |
4756 | buffer[offset] = 0x70; | |
4757 | /* ABORTED COMMAND */ | |
4758 | buffer[offset+SPC_SENSE_KEY_OFFSET] = ABORTED_COMMAND; | |
4759 | /* WRITE ERROR */ | |
4760 | buffer[offset+SPC_ASC_KEY_OFFSET] = 0x0c; | |
4761 | /* UNEXPECTED_UNSOLICITED_DATA */ | |
4762 | buffer[offset+SPC_ASCQ_KEY_OFFSET] = 0x0c; | |
4763 | break; | |
4764 | case TCM_SERVICE_CRC_ERROR: | |
4765 | /* CURRENT ERROR */ | |
4766 | buffer[offset] = 0x70; | |
4767 | /* ABORTED COMMAND */ | |
4768 | buffer[offset+SPC_SENSE_KEY_OFFSET] = ABORTED_COMMAND; | |
4769 | /* PROTOCOL SERVICE CRC ERROR */ | |
4770 | buffer[offset+SPC_ASC_KEY_OFFSET] = 0x47; | |
4771 | /* N/A */ | |
4772 | buffer[offset+SPC_ASCQ_KEY_OFFSET] = 0x05; | |
4773 | break; | |
4774 | case TCM_SNACK_REJECTED: | |
4775 | /* CURRENT ERROR */ | |
4776 | buffer[offset] = 0x70; | |
4777 | /* ABORTED COMMAND */ | |
4778 | buffer[offset+SPC_SENSE_KEY_OFFSET] = ABORTED_COMMAND; | |
4779 | /* READ ERROR */ | |
4780 | buffer[offset+SPC_ASC_KEY_OFFSET] = 0x11; | |
4781 | /* FAILED RETRANSMISSION REQUEST */ | |
4782 | buffer[offset+SPC_ASCQ_KEY_OFFSET] = 0x13; | |
4783 | break; | |
4784 | case TCM_WRITE_PROTECTED: | |
4785 | /* CURRENT ERROR */ | |
4786 | buffer[offset] = 0x70; | |
4787 | /* DATA PROTECT */ | |
4788 | buffer[offset+SPC_SENSE_KEY_OFFSET] = DATA_PROTECT; | |
4789 | /* WRITE PROTECTED */ | |
4790 | buffer[offset+SPC_ASC_KEY_OFFSET] = 0x27; | |
4791 | break; | |
4792 | case TCM_CHECK_CONDITION_UNIT_ATTENTION: | |
4793 | /* CURRENT ERROR */ | |
4794 | buffer[offset] = 0x70; | |
4795 | /* UNIT ATTENTION */ | |
4796 | buffer[offset+SPC_SENSE_KEY_OFFSET] = UNIT_ATTENTION; | |
4797 | core_scsi3_ua_for_check_condition(cmd, &asc, &ascq); | |
4798 | buffer[offset+SPC_ASC_KEY_OFFSET] = asc; | |
4799 | buffer[offset+SPC_ASCQ_KEY_OFFSET] = ascq; | |
4800 | break; | |
4801 | case TCM_CHECK_CONDITION_NOT_READY: | |
4802 | /* CURRENT ERROR */ | |
4803 | buffer[offset] = 0x70; | |
4804 | /* Not Ready */ | |
4805 | buffer[offset+SPC_SENSE_KEY_OFFSET] = NOT_READY; | |
4806 | transport_get_sense_codes(cmd, &asc, &ascq); | |
4807 | buffer[offset+SPC_ASC_KEY_OFFSET] = asc; | |
4808 | buffer[offset+SPC_ASCQ_KEY_OFFSET] = ascq; | |
4809 | break; | |
4810 | case TCM_LOGICAL_UNIT_COMMUNICATION_FAILURE: | |
4811 | default: | |
4812 | /* CURRENT ERROR */ | |
4813 | buffer[offset] = 0x70; | |
4814 | /* ILLEGAL REQUEST */ | |
4815 | buffer[offset+SPC_SENSE_KEY_OFFSET] = ILLEGAL_REQUEST; | |
4816 | /* LOGICAL UNIT COMMUNICATION FAILURE */ | |
4817 | buffer[offset+SPC_ASC_KEY_OFFSET] = 0x80; | |
4818 | break; | |
4819 | } | |
4820 | /* | |
4821 | * This code uses linux/include/scsi/scsi.h SAM status codes! | |
4822 | */ | |
4823 | cmd->scsi_status = SAM_STAT_CHECK_CONDITION; | |
4824 | /* | |
4825 | * Automatically padded, this value is encoded in the fabric's | |
4826 | * data_length response PDU containing the SCSI defined sense data. | |
4827 | */ | |
4828 | cmd->scsi_sense_length = TRANSPORT_SENSE_BUFFER + offset; | |
4829 | ||
4830 | after_reason: | |
07bde79a | 4831 | return cmd->se_tfo->queue_status(cmd); |
c66ac9db NB |
4832 | } |
4833 | EXPORT_SYMBOL(transport_send_check_condition_and_sense); | |
4834 | ||
4835 | int transport_check_aborted_status(struct se_cmd *cmd, int send_status) | |
4836 | { | |
4837 | int ret = 0; | |
4838 | ||
a1d8b49a | 4839 | if (atomic_read(&cmd->t_transport_aborted) != 0) { |
6708bb27 | 4840 | if (!send_status || |
c66ac9db NB |
4841 | (cmd->se_cmd_flags & SCF_SENT_DELAYED_TAS)) |
4842 | return 1; | |
4843 | #if 0 | |
6708bb27 | 4844 | pr_debug("Sending delayed SAM_STAT_TASK_ABORTED" |
c66ac9db | 4845 | " status for CDB: 0x%02x ITT: 0x%08x\n", |
a1d8b49a | 4846 | cmd->t_task_cdb[0], |
e3d6f909 | 4847 | cmd->se_tfo->get_task_tag(cmd)); |
c66ac9db NB |
4848 | #endif |
4849 | cmd->se_cmd_flags |= SCF_SENT_DELAYED_TAS; | |
e3d6f909 | 4850 | cmd->se_tfo->queue_status(cmd); |
c66ac9db NB |
4851 | ret = 1; |
4852 | } | |
4853 | return ret; | |
4854 | } | |
4855 | EXPORT_SYMBOL(transport_check_aborted_status); | |
4856 | ||
4857 | void transport_send_task_abort(struct se_cmd *cmd) | |
4858 | { | |
4859 | /* | |
4860 | * If there are still expected incoming fabric WRITEs, we wait | |
4861 | * until until they have completed before sending a TASK_ABORTED | |
4862 | * response. This response with TASK_ABORTED status will be | |
4863 | * queued back to fabric module by transport_check_aborted_status(). | |
4864 | */ | |
4865 | if (cmd->data_direction == DMA_TO_DEVICE) { | |
e3d6f909 | 4866 | if (cmd->se_tfo->write_pending_status(cmd) != 0) { |
a1d8b49a | 4867 | atomic_inc(&cmd->t_transport_aborted); |
c66ac9db NB |
4868 | smp_mb__after_atomic_inc(); |
4869 | cmd->scsi_status = SAM_STAT_TASK_ABORTED; | |
4870 | transport_new_cmd_failure(cmd); | |
4871 | return; | |
4872 | } | |
4873 | } | |
4874 | cmd->scsi_status = SAM_STAT_TASK_ABORTED; | |
4875 | #if 0 | |
6708bb27 | 4876 | pr_debug("Setting SAM_STAT_TASK_ABORTED status for CDB: 0x%02x," |
a1d8b49a | 4877 | " ITT: 0x%08x\n", cmd->t_task_cdb[0], |
e3d6f909 | 4878 | cmd->se_tfo->get_task_tag(cmd)); |
c66ac9db | 4879 | #endif |
e3d6f909 | 4880 | cmd->se_tfo->queue_status(cmd); |
c66ac9db NB |
4881 | } |
4882 | ||
4883 | /* transport_generic_do_tmr(): | |
4884 | * | |
4885 | * | |
4886 | */ | |
4887 | int transport_generic_do_tmr(struct se_cmd *cmd) | |
4888 | { | |
5951146d | 4889 | struct se_device *dev = cmd->se_dev; |
c66ac9db NB |
4890 | struct se_tmr_req *tmr = cmd->se_tmr_req; |
4891 | int ret; | |
4892 | ||
4893 | switch (tmr->function) { | |
5c6cd613 | 4894 | case TMR_ABORT_TASK: |
c66ac9db NB |
4895 | tmr->response = TMR_FUNCTION_REJECTED; |
4896 | break; | |
5c6cd613 NB |
4897 | case TMR_ABORT_TASK_SET: |
4898 | case TMR_CLEAR_ACA: | |
4899 | case TMR_CLEAR_TASK_SET: | |
c66ac9db NB |
4900 | tmr->response = TMR_TASK_MGMT_FUNCTION_NOT_SUPPORTED; |
4901 | break; | |
5c6cd613 | 4902 | case TMR_LUN_RESET: |
c66ac9db NB |
4903 | ret = core_tmr_lun_reset(dev, tmr, NULL, NULL); |
4904 | tmr->response = (!ret) ? TMR_FUNCTION_COMPLETE : | |
4905 | TMR_FUNCTION_REJECTED; | |
4906 | break; | |
5c6cd613 | 4907 | case TMR_TARGET_WARM_RESET: |
c66ac9db NB |
4908 | tmr->response = TMR_FUNCTION_REJECTED; |
4909 | break; | |
5c6cd613 | 4910 | case TMR_TARGET_COLD_RESET: |
c66ac9db NB |
4911 | tmr->response = TMR_FUNCTION_REJECTED; |
4912 | break; | |
c66ac9db | 4913 | default: |
6708bb27 | 4914 | pr_err("Uknown TMR function: 0x%02x.\n", |
c66ac9db NB |
4915 | tmr->function); |
4916 | tmr->response = TMR_FUNCTION_REJECTED; | |
4917 | break; | |
4918 | } | |
4919 | ||
4920 | cmd->t_state = TRANSPORT_ISTATE_PROCESSING; | |
e3d6f909 | 4921 | cmd->se_tfo->queue_tm_rsp(cmd); |
c66ac9db NB |
4922 | |
4923 | transport_cmd_check_stop(cmd, 2, 0); | |
4924 | return 0; | |
4925 | } | |
4926 | ||
4927 | /* | |
4928 | * Called with spin_lock_irq(&dev->execute_task_lock); held | |
4929 | * | |
4930 | */ | |
4931 | static struct se_task * | |
4932 | transport_get_task_from_state_list(struct se_device *dev) | |
4933 | { | |
4934 | struct se_task *task; | |
4935 | ||
4936 | if (list_empty(&dev->state_task_list)) | |
4937 | return NULL; | |
4938 | ||
4939 | list_for_each_entry(task, &dev->state_task_list, t_state_list) | |
4940 | break; | |
4941 | ||
4942 | list_del(&task->t_state_list); | |
4943 | atomic_set(&task->task_state_active, 0); | |
4944 | ||
4945 | return task; | |
4946 | } | |
4947 | ||
4948 | static void transport_processing_shutdown(struct se_device *dev) | |
4949 | { | |
4950 | struct se_cmd *cmd; | |
c66ac9db | 4951 | struct se_task *task; |
c66ac9db NB |
4952 | unsigned long flags; |
4953 | /* | |
4954 | * Empty the struct se_device's struct se_task state list. | |
4955 | */ | |
4956 | spin_lock_irqsave(&dev->execute_task_lock, flags); | |
4957 | while ((task = transport_get_task_from_state_list(dev))) { | |
e3d6f909 | 4958 | if (!task->task_se_cmd) { |
6708bb27 | 4959 | pr_err("task->task_se_cmd is NULL!\n"); |
c66ac9db NB |
4960 | continue; |
4961 | } | |
e3d6f909 | 4962 | cmd = task->task_se_cmd; |
c66ac9db | 4963 | |
c66ac9db NB |
4964 | spin_unlock_irqrestore(&dev->execute_task_lock, flags); |
4965 | ||
a1d8b49a | 4966 | spin_lock_irqsave(&cmd->t_state_lock, flags); |
c66ac9db | 4967 | |
6708bb27 AG |
4968 | pr_debug("PT: cmd: %p task: %p ITT: 0x%08x," |
4969 | " i_state: %d, t_state/def_t_state:" | |
c66ac9db | 4970 | " %d/%d cdb: 0x%02x\n", cmd, task, |
6708bb27 AG |
4971 | cmd->se_tfo->get_task_tag(cmd), |
4972 | cmd->se_tfo->get_cmd_state(cmd), | |
c66ac9db | 4973 | cmd->t_state, cmd->deferred_t_state, |
a1d8b49a | 4974 | cmd->t_task_cdb[0]); |
6708bb27 | 4975 | pr_debug("PT: ITT[0x%08x] - t_tasks: %d t_task_cdbs_left:" |
c66ac9db NB |
4976 | " %d t_task_cdbs_sent: %d -- t_transport_active: %d" |
4977 | " t_transport_stop: %d t_transport_sent: %d\n", | |
e3d6f909 | 4978 | cmd->se_tfo->get_task_tag(cmd), |
6708bb27 | 4979 | cmd->t_task_list_num, |
a1d8b49a AG |
4980 | atomic_read(&cmd->t_task_cdbs_left), |
4981 | atomic_read(&cmd->t_task_cdbs_sent), | |
4982 | atomic_read(&cmd->t_transport_active), | |
4983 | atomic_read(&cmd->t_transport_stop), | |
4984 | atomic_read(&cmd->t_transport_sent)); | |
c66ac9db NB |
4985 | |
4986 | if (atomic_read(&task->task_active)) { | |
4987 | atomic_set(&task->task_stop, 1); | |
4988 | spin_unlock_irqrestore( | |
a1d8b49a | 4989 | &cmd->t_state_lock, flags); |
c66ac9db | 4990 | |
6708bb27 | 4991 | pr_debug("Waiting for task: %p to shutdown for dev:" |
c66ac9db NB |
4992 | " %p\n", task, dev); |
4993 | wait_for_completion(&task->task_stop_comp); | |
6708bb27 | 4994 | pr_debug("Completed task: %p shutdown for dev: %p\n", |
c66ac9db NB |
4995 | task, dev); |
4996 | ||
a1d8b49a AG |
4997 | spin_lock_irqsave(&cmd->t_state_lock, flags); |
4998 | atomic_dec(&cmd->t_task_cdbs_left); | |
c66ac9db NB |
4999 | |
5000 | atomic_set(&task->task_active, 0); | |
5001 | atomic_set(&task->task_stop, 0); | |
52208ae3 NB |
5002 | } else { |
5003 | if (atomic_read(&task->task_execute_queue) != 0) | |
5004 | transport_remove_task_from_execute_queue(task, dev); | |
c66ac9db NB |
5005 | } |
5006 | __transport_stop_task_timer(task, &flags); | |
5007 | ||
6708bb27 | 5008 | if (!atomic_dec_and_test(&cmd->t_task_cdbs_ex_left)) { |
c66ac9db | 5009 | spin_unlock_irqrestore( |
a1d8b49a | 5010 | &cmd->t_state_lock, flags); |
c66ac9db | 5011 | |
6708bb27 | 5012 | pr_debug("Skipping task: %p, dev: %p for" |
c66ac9db | 5013 | " t_task_cdbs_ex_left: %d\n", task, dev, |
a1d8b49a | 5014 | atomic_read(&cmd->t_task_cdbs_ex_left)); |
c66ac9db NB |
5015 | |
5016 | spin_lock_irqsave(&dev->execute_task_lock, flags); | |
5017 | continue; | |
5018 | } | |
5019 | ||
a1d8b49a | 5020 | if (atomic_read(&cmd->t_transport_active)) { |
6708bb27 | 5021 | pr_debug("got t_transport_active = 1 for task: %p, dev:" |
c66ac9db NB |
5022 | " %p\n", task, dev); |
5023 | ||
a1d8b49a | 5024 | if (atomic_read(&cmd->t_fe_count)) { |
c66ac9db | 5025 | spin_unlock_irqrestore( |
a1d8b49a | 5026 | &cmd->t_state_lock, flags); |
c66ac9db NB |
5027 | transport_send_check_condition_and_sense( |
5028 | cmd, TCM_LOGICAL_UNIT_COMMUNICATION_FAILURE, | |
5029 | 0); | |
5030 | transport_remove_cmd_from_queue(cmd, | |
5951146d | 5031 | &cmd->se_dev->dev_queue_obj); |
c66ac9db NB |
5032 | |
5033 | transport_lun_remove_cmd(cmd); | |
5034 | transport_cmd_check_stop(cmd, 1, 0); | |
5035 | } else { | |
5036 | spin_unlock_irqrestore( | |
a1d8b49a | 5037 | &cmd->t_state_lock, flags); |
c66ac9db NB |
5038 | |
5039 | transport_remove_cmd_from_queue(cmd, | |
5951146d | 5040 | &cmd->se_dev->dev_queue_obj); |
c66ac9db NB |
5041 | |
5042 | transport_lun_remove_cmd(cmd); | |
5043 | ||
5044 | if (transport_cmd_check_stop(cmd, 1, 0)) | |
35462975 | 5045 | transport_generic_remove(cmd, 0); |
c66ac9db NB |
5046 | } |
5047 | ||
5048 | spin_lock_irqsave(&dev->execute_task_lock, flags); | |
5049 | continue; | |
5050 | } | |
6708bb27 | 5051 | pr_debug("Got t_transport_active = 0 for task: %p, dev: %p\n", |
c66ac9db NB |
5052 | task, dev); |
5053 | ||
a1d8b49a | 5054 | if (atomic_read(&cmd->t_fe_count)) { |
c66ac9db | 5055 | spin_unlock_irqrestore( |
a1d8b49a | 5056 | &cmd->t_state_lock, flags); |
c66ac9db NB |
5057 | transport_send_check_condition_and_sense(cmd, |
5058 | TCM_LOGICAL_UNIT_COMMUNICATION_FAILURE, 0); | |
5059 | transport_remove_cmd_from_queue(cmd, | |
5951146d | 5060 | &cmd->se_dev->dev_queue_obj); |
c66ac9db NB |
5061 | |
5062 | transport_lun_remove_cmd(cmd); | |
5063 | transport_cmd_check_stop(cmd, 1, 0); | |
5064 | } else { | |
5065 | spin_unlock_irqrestore( | |
a1d8b49a | 5066 | &cmd->t_state_lock, flags); |
c66ac9db NB |
5067 | |
5068 | transport_remove_cmd_from_queue(cmd, | |
5951146d | 5069 | &cmd->se_dev->dev_queue_obj); |
c66ac9db NB |
5070 | transport_lun_remove_cmd(cmd); |
5071 | ||
5072 | if (transport_cmd_check_stop(cmd, 1, 0)) | |
35462975 | 5073 | transport_generic_remove(cmd, 0); |
c66ac9db NB |
5074 | } |
5075 | ||
5076 | spin_lock_irqsave(&dev->execute_task_lock, flags); | |
5077 | } | |
5078 | spin_unlock_irqrestore(&dev->execute_task_lock, flags); | |
5079 | /* | |
5080 | * Empty the struct se_device's struct se_cmd list. | |
5081 | */ | |
5951146d | 5082 | while ((cmd = transport_get_cmd_from_queue(&dev->dev_queue_obj))) { |
c66ac9db | 5083 | |
6708bb27 | 5084 | pr_debug("From Device Queue: cmd: %p t_state: %d\n", |
5951146d | 5085 | cmd, cmd->t_state); |
c66ac9db | 5086 | |
a1d8b49a | 5087 | if (atomic_read(&cmd->t_fe_count)) { |
c66ac9db NB |
5088 | transport_send_check_condition_and_sense(cmd, |
5089 | TCM_LOGICAL_UNIT_COMMUNICATION_FAILURE, 0); | |
5090 | ||
5091 | transport_lun_remove_cmd(cmd); | |
5092 | transport_cmd_check_stop(cmd, 1, 0); | |
5093 | } else { | |
5094 | transport_lun_remove_cmd(cmd); | |
5095 | if (transport_cmd_check_stop(cmd, 1, 0)) | |
35462975 | 5096 | transport_generic_remove(cmd, 0); |
c66ac9db | 5097 | } |
c66ac9db | 5098 | } |
c66ac9db NB |
5099 | } |
5100 | ||
5101 | /* transport_processing_thread(): | |
5102 | * | |
5103 | * | |
5104 | */ | |
5105 | static int transport_processing_thread(void *param) | |
5106 | { | |
5951146d | 5107 | int ret; |
c66ac9db NB |
5108 | struct se_cmd *cmd; |
5109 | struct se_device *dev = (struct se_device *) param; | |
c66ac9db NB |
5110 | |
5111 | set_user_nice(current, -20); | |
5112 | ||
5113 | while (!kthread_should_stop()) { | |
e3d6f909 AG |
5114 | ret = wait_event_interruptible(dev->dev_queue_obj.thread_wq, |
5115 | atomic_read(&dev->dev_queue_obj.queue_cnt) || | |
c66ac9db NB |
5116 | kthread_should_stop()); |
5117 | if (ret < 0) | |
5118 | goto out; | |
5119 | ||
5120 | spin_lock_irq(&dev->dev_status_lock); | |
5121 | if (dev->dev_status & TRANSPORT_DEVICE_SHUTDOWN) { | |
5122 | spin_unlock_irq(&dev->dev_status_lock); | |
5123 | transport_processing_shutdown(dev); | |
5124 | continue; | |
5125 | } | |
5126 | spin_unlock_irq(&dev->dev_status_lock); | |
5127 | ||
5128 | get_cmd: | |
5129 | __transport_execute_tasks(dev); | |
5130 | ||
5951146d AG |
5131 | cmd = transport_get_cmd_from_queue(&dev->dev_queue_obj); |
5132 | if (!cmd) | |
c66ac9db NB |
5133 | continue; |
5134 | ||
5951146d | 5135 | switch (cmd->t_state) { |
c66ac9db | 5136 | case TRANSPORT_NEW_CMD_MAP: |
6708bb27 AG |
5137 | if (!cmd->se_tfo->new_cmd_map) { |
5138 | pr_err("cmd->se_tfo->new_cmd_map is" | |
c66ac9db NB |
5139 | " NULL for TRANSPORT_NEW_CMD_MAP\n"); |
5140 | BUG(); | |
5141 | } | |
e3d6f909 | 5142 | ret = cmd->se_tfo->new_cmd_map(cmd); |
c66ac9db NB |
5143 | if (ret < 0) { |
5144 | cmd->transport_error_status = ret; | |
5145 | transport_generic_request_failure(cmd, NULL, | |
5146 | 0, (cmd->data_direction != | |
5147 | DMA_TO_DEVICE)); | |
5148 | break; | |
5149 | } | |
5150 | /* Fall through */ | |
5151 | case TRANSPORT_NEW_CMD: | |
5152 | ret = transport_generic_new_cmd(cmd); | |
07bde79a NB |
5153 | if (ret == -EAGAIN) |
5154 | break; | |
5155 | else if (ret < 0) { | |
c66ac9db NB |
5156 | cmd->transport_error_status = ret; |
5157 | transport_generic_request_failure(cmd, NULL, | |
5158 | 0, (cmd->data_direction != | |
5159 | DMA_TO_DEVICE)); | |
5160 | } | |
5161 | break; | |
5162 | case TRANSPORT_PROCESS_WRITE: | |
5163 | transport_generic_process_write(cmd); | |
5164 | break; | |
5165 | case TRANSPORT_COMPLETE_OK: | |
5166 | transport_stop_all_task_timers(cmd); | |
5167 | transport_generic_complete_ok(cmd); | |
5168 | break; | |
5169 | case TRANSPORT_REMOVE: | |
35462975 | 5170 | transport_generic_remove(cmd, 0); |
c66ac9db | 5171 | break; |
f4366772 | 5172 | case TRANSPORT_FREE_CMD_INTR: |
35462975 | 5173 | transport_generic_free_cmd(cmd, 0, 0); |
f4366772 | 5174 | break; |
c66ac9db NB |
5175 | case TRANSPORT_PROCESS_TMR: |
5176 | transport_generic_do_tmr(cmd); | |
5177 | break; | |
5178 | case TRANSPORT_COMPLETE_FAILURE: | |
5179 | transport_generic_request_failure(cmd, NULL, 1, 1); | |
5180 | break; | |
5181 | case TRANSPORT_COMPLETE_TIMEOUT: | |
5182 | transport_stop_all_task_timers(cmd); | |
5183 | transport_generic_request_timeout(cmd); | |
5184 | break; | |
07bde79a NB |
5185 | case TRANSPORT_COMPLETE_QF_WP: |
5186 | transport_generic_write_pending(cmd); | |
5187 | break; | |
c66ac9db | 5188 | default: |
6708bb27 | 5189 | pr_err("Unknown t_state: %d deferred_t_state:" |
c66ac9db | 5190 | " %d for ITT: 0x%08x i_state: %d on SE LUN:" |
5951146d | 5191 | " %u\n", cmd->t_state, cmd->deferred_t_state, |
e3d6f909 AG |
5192 | cmd->se_tfo->get_task_tag(cmd), |
5193 | cmd->se_tfo->get_cmd_state(cmd), | |
5194 | cmd->se_lun->unpacked_lun); | |
c66ac9db NB |
5195 | BUG(); |
5196 | } | |
5197 | ||
5198 | goto get_cmd; | |
5199 | } | |
5200 | ||
5201 | out: | |
5202 | transport_release_all_cmds(dev); | |
5203 | dev->process_thread = NULL; | |
5204 | return 0; | |
5205 | } |