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c66ac9db NB |
1 | /******************************************************************************* |
2 | * Filename: target_core_transport.c | |
3 | * | |
4 | * This file contains the Generic Target Engine Core. | |
5 | * | |
6 | * Copyright (c) 2002, 2003, 2004, 2005 PyX Technologies, Inc. | |
7 | * Copyright (c) 2005, 2006, 2007 SBE, Inc. | |
8 | * Copyright (c) 2007-2010 Rising Tide Systems | |
9 | * Copyright (c) 2008-2010 Linux-iSCSI.org | |
10 | * | |
11 | * Nicholas A. Bellinger <nab@kernel.org> | |
12 | * | |
13 | * This program is free software; you can redistribute it and/or modify | |
14 | * it under the terms of the GNU General Public License as published by | |
15 | * the Free Software Foundation; either version 2 of the License, or | |
16 | * (at your option) any later version. | |
17 | * | |
18 | * This program is distributed in the hope that it will be useful, | |
19 | * but WITHOUT ANY WARRANTY; without even the implied warranty of | |
20 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
21 | * GNU General Public License for more details. | |
22 | * | |
23 | * You should have received a copy of the GNU General Public License | |
24 | * along with this program; if not, write to the Free Software | |
25 | * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. | |
26 | * | |
27 | ******************************************************************************/ | |
28 | ||
c66ac9db NB |
29 | #include <linux/net.h> |
30 | #include <linux/delay.h> | |
31 | #include <linux/string.h> | |
32 | #include <linux/timer.h> | |
33 | #include <linux/slab.h> | |
34 | #include <linux/blkdev.h> | |
35 | #include <linux/spinlock.h> | |
c66ac9db NB |
36 | #include <linux/kthread.h> |
37 | #include <linux/in.h> | |
38 | #include <linux/cdrom.h> | |
39 | #include <asm/unaligned.h> | |
40 | #include <net/sock.h> | |
41 | #include <net/tcp.h> | |
42 | #include <scsi/scsi.h> | |
43 | #include <scsi/scsi_cmnd.h> | |
e66ecd50 | 44 | #include <scsi/scsi_tcq.h> |
c66ac9db NB |
45 | |
46 | #include <target/target_core_base.h> | |
47 | #include <target/target_core_device.h> | |
48 | #include <target/target_core_tmr.h> | |
49 | #include <target/target_core_tpg.h> | |
50 | #include <target/target_core_transport.h> | |
51 | #include <target/target_core_fabric_ops.h> | |
52 | #include <target/target_core_configfs.h> | |
53 | ||
54 | #include "target_core_alua.h" | |
55 | #include "target_core_hba.h" | |
56 | #include "target_core_pr.h" | |
57 | #include "target_core_scdb.h" | |
58 | #include "target_core_ua.h" | |
59 | ||
e3d6f909 | 60 | static int sub_api_initialized; |
c66ac9db NB |
61 | |
62 | static struct kmem_cache *se_cmd_cache; | |
63 | static struct kmem_cache *se_sess_cache; | |
64 | struct kmem_cache *se_tmr_req_cache; | |
65 | struct kmem_cache *se_ua_cache; | |
c66ac9db NB |
66 | struct kmem_cache *t10_pr_reg_cache; |
67 | struct kmem_cache *t10_alua_lu_gp_cache; | |
68 | struct kmem_cache *t10_alua_lu_gp_mem_cache; | |
69 | struct kmem_cache *t10_alua_tg_pt_gp_cache; | |
70 | struct kmem_cache *t10_alua_tg_pt_gp_mem_cache; | |
71 | ||
72 | /* Used for transport_dev_get_map_*() */ | |
73 | typedef int (*map_func_t)(struct se_task *, u32); | |
74 | ||
75 | static int transport_generic_write_pending(struct se_cmd *); | |
5951146d | 76 | static int transport_processing_thread(void *param); |
c66ac9db NB |
77 | static int __transport_execute_tasks(struct se_device *dev); |
78 | static void transport_complete_task_attr(struct se_cmd *cmd); | |
07bde79a NB |
79 | static int transport_complete_qf(struct se_cmd *cmd); |
80 | static void transport_handle_queue_full(struct se_cmd *cmd, | |
81 | struct se_device *dev, int (*qf_callback)(struct se_cmd *)); | |
c66ac9db NB |
82 | static void transport_direct_request_timeout(struct se_cmd *cmd); |
83 | static void transport_free_dev_tasks(struct se_cmd *cmd); | |
a1d8b49a | 84 | static u32 transport_allocate_tasks(struct se_cmd *cmd, |
ec98f782 | 85 | unsigned long long starting_lba, |
c66ac9db | 86 | enum dma_data_direction data_direction, |
ec98f782 | 87 | struct scatterlist *sgl, unsigned int nents); |
05d1c7c0 | 88 | static int transport_generic_get_mem(struct se_cmd *cmd); |
39c05f32 | 89 | static void transport_put_cmd(struct se_cmd *cmd); |
c66ac9db NB |
90 | static void transport_remove_cmd_from_queue(struct se_cmd *cmd, |
91 | struct se_queue_obj *qobj); | |
92 | static int transport_set_sense_codes(struct se_cmd *cmd, u8 asc, u8 ascq); | |
93 | static void transport_stop_all_task_timers(struct se_cmd *cmd); | |
94 | ||
e3d6f909 | 95 | int init_se_kmem_caches(void) |
c66ac9db | 96 | { |
c66ac9db NB |
97 | se_cmd_cache = kmem_cache_create("se_cmd_cache", |
98 | sizeof(struct se_cmd), __alignof__(struct se_cmd), 0, NULL); | |
6708bb27 AG |
99 | if (!se_cmd_cache) { |
100 | pr_err("kmem_cache_create for struct se_cmd failed\n"); | |
c66ac9db NB |
101 | goto out; |
102 | } | |
103 | se_tmr_req_cache = kmem_cache_create("se_tmr_cache", | |
104 | sizeof(struct se_tmr_req), __alignof__(struct se_tmr_req), | |
105 | 0, NULL); | |
6708bb27 AG |
106 | if (!se_tmr_req_cache) { |
107 | pr_err("kmem_cache_create() for struct se_tmr_req" | |
c66ac9db NB |
108 | " failed\n"); |
109 | goto out; | |
110 | } | |
111 | se_sess_cache = kmem_cache_create("se_sess_cache", | |
112 | sizeof(struct se_session), __alignof__(struct se_session), | |
113 | 0, NULL); | |
6708bb27 AG |
114 | if (!se_sess_cache) { |
115 | pr_err("kmem_cache_create() for struct se_session" | |
c66ac9db NB |
116 | " failed\n"); |
117 | goto out; | |
118 | } | |
119 | se_ua_cache = kmem_cache_create("se_ua_cache", | |
120 | sizeof(struct se_ua), __alignof__(struct se_ua), | |
121 | 0, NULL); | |
6708bb27 AG |
122 | if (!se_ua_cache) { |
123 | pr_err("kmem_cache_create() for struct se_ua failed\n"); | |
c66ac9db NB |
124 | goto out; |
125 | } | |
c66ac9db NB |
126 | t10_pr_reg_cache = kmem_cache_create("t10_pr_reg_cache", |
127 | sizeof(struct t10_pr_registration), | |
128 | __alignof__(struct t10_pr_registration), 0, NULL); | |
6708bb27 AG |
129 | if (!t10_pr_reg_cache) { |
130 | pr_err("kmem_cache_create() for struct t10_pr_registration" | |
c66ac9db NB |
131 | " failed\n"); |
132 | goto out; | |
133 | } | |
134 | t10_alua_lu_gp_cache = kmem_cache_create("t10_alua_lu_gp_cache", | |
135 | sizeof(struct t10_alua_lu_gp), __alignof__(struct t10_alua_lu_gp), | |
136 | 0, NULL); | |
6708bb27 AG |
137 | if (!t10_alua_lu_gp_cache) { |
138 | pr_err("kmem_cache_create() for t10_alua_lu_gp_cache" | |
c66ac9db NB |
139 | " failed\n"); |
140 | goto out; | |
141 | } | |
142 | t10_alua_lu_gp_mem_cache = kmem_cache_create("t10_alua_lu_gp_mem_cache", | |
143 | sizeof(struct t10_alua_lu_gp_member), | |
144 | __alignof__(struct t10_alua_lu_gp_member), 0, NULL); | |
6708bb27 AG |
145 | if (!t10_alua_lu_gp_mem_cache) { |
146 | pr_err("kmem_cache_create() for t10_alua_lu_gp_mem_" | |
c66ac9db NB |
147 | "cache failed\n"); |
148 | goto out; | |
149 | } | |
150 | t10_alua_tg_pt_gp_cache = kmem_cache_create("t10_alua_tg_pt_gp_cache", | |
151 | sizeof(struct t10_alua_tg_pt_gp), | |
152 | __alignof__(struct t10_alua_tg_pt_gp), 0, NULL); | |
6708bb27 AG |
153 | if (!t10_alua_tg_pt_gp_cache) { |
154 | pr_err("kmem_cache_create() for t10_alua_tg_pt_gp_" | |
c66ac9db NB |
155 | "cache failed\n"); |
156 | goto out; | |
157 | } | |
158 | t10_alua_tg_pt_gp_mem_cache = kmem_cache_create( | |
159 | "t10_alua_tg_pt_gp_mem_cache", | |
160 | sizeof(struct t10_alua_tg_pt_gp_member), | |
161 | __alignof__(struct t10_alua_tg_pt_gp_member), | |
162 | 0, NULL); | |
6708bb27 AG |
163 | if (!t10_alua_tg_pt_gp_mem_cache) { |
164 | pr_err("kmem_cache_create() for t10_alua_tg_pt_gp_" | |
c66ac9db NB |
165 | "mem_t failed\n"); |
166 | goto out; | |
167 | } | |
168 | ||
c66ac9db NB |
169 | return 0; |
170 | out: | |
171 | if (se_cmd_cache) | |
172 | kmem_cache_destroy(se_cmd_cache); | |
173 | if (se_tmr_req_cache) | |
174 | kmem_cache_destroy(se_tmr_req_cache); | |
175 | if (se_sess_cache) | |
176 | kmem_cache_destroy(se_sess_cache); | |
177 | if (se_ua_cache) | |
178 | kmem_cache_destroy(se_ua_cache); | |
c66ac9db NB |
179 | if (t10_pr_reg_cache) |
180 | kmem_cache_destroy(t10_pr_reg_cache); | |
181 | if (t10_alua_lu_gp_cache) | |
182 | kmem_cache_destroy(t10_alua_lu_gp_cache); | |
183 | if (t10_alua_lu_gp_mem_cache) | |
184 | kmem_cache_destroy(t10_alua_lu_gp_mem_cache); | |
185 | if (t10_alua_tg_pt_gp_cache) | |
186 | kmem_cache_destroy(t10_alua_tg_pt_gp_cache); | |
187 | if (t10_alua_tg_pt_gp_mem_cache) | |
188 | kmem_cache_destroy(t10_alua_tg_pt_gp_mem_cache); | |
e3d6f909 | 189 | return -ENOMEM; |
c66ac9db NB |
190 | } |
191 | ||
e3d6f909 | 192 | void release_se_kmem_caches(void) |
c66ac9db | 193 | { |
c66ac9db NB |
194 | kmem_cache_destroy(se_cmd_cache); |
195 | kmem_cache_destroy(se_tmr_req_cache); | |
196 | kmem_cache_destroy(se_sess_cache); | |
197 | kmem_cache_destroy(se_ua_cache); | |
c66ac9db NB |
198 | kmem_cache_destroy(t10_pr_reg_cache); |
199 | kmem_cache_destroy(t10_alua_lu_gp_cache); | |
200 | kmem_cache_destroy(t10_alua_lu_gp_mem_cache); | |
201 | kmem_cache_destroy(t10_alua_tg_pt_gp_cache); | |
202 | kmem_cache_destroy(t10_alua_tg_pt_gp_mem_cache); | |
c66ac9db NB |
203 | } |
204 | ||
e3d6f909 AG |
205 | /* This code ensures unique mib indexes are handed out. */ |
206 | static DEFINE_SPINLOCK(scsi_mib_index_lock); | |
207 | static u32 scsi_mib_index[SCSI_INDEX_TYPE_MAX]; | |
e89d15ee NB |
208 | |
209 | /* | |
210 | * Allocate a new row index for the entry type specified | |
211 | */ | |
212 | u32 scsi_get_new_index(scsi_index_t type) | |
213 | { | |
214 | u32 new_index; | |
215 | ||
e3d6f909 | 216 | BUG_ON((type < 0) || (type >= SCSI_INDEX_TYPE_MAX)); |
e89d15ee | 217 | |
e3d6f909 AG |
218 | spin_lock(&scsi_mib_index_lock); |
219 | new_index = ++scsi_mib_index[type]; | |
220 | spin_unlock(&scsi_mib_index_lock); | |
e89d15ee NB |
221 | |
222 | return new_index; | |
223 | } | |
224 | ||
c66ac9db NB |
225 | void transport_init_queue_obj(struct se_queue_obj *qobj) |
226 | { | |
227 | atomic_set(&qobj->queue_cnt, 0); | |
228 | INIT_LIST_HEAD(&qobj->qobj_list); | |
229 | init_waitqueue_head(&qobj->thread_wq); | |
230 | spin_lock_init(&qobj->cmd_queue_lock); | |
231 | } | |
232 | EXPORT_SYMBOL(transport_init_queue_obj); | |
233 | ||
234 | static int transport_subsystem_reqmods(void) | |
235 | { | |
236 | int ret; | |
237 | ||
238 | ret = request_module("target_core_iblock"); | |
239 | if (ret != 0) | |
6708bb27 | 240 | pr_err("Unable to load target_core_iblock\n"); |
c66ac9db NB |
241 | |
242 | ret = request_module("target_core_file"); | |
243 | if (ret != 0) | |
6708bb27 | 244 | pr_err("Unable to load target_core_file\n"); |
c66ac9db NB |
245 | |
246 | ret = request_module("target_core_pscsi"); | |
247 | if (ret != 0) | |
6708bb27 | 248 | pr_err("Unable to load target_core_pscsi\n"); |
c66ac9db NB |
249 | |
250 | ret = request_module("target_core_stgt"); | |
251 | if (ret != 0) | |
6708bb27 | 252 | pr_err("Unable to load target_core_stgt\n"); |
c66ac9db NB |
253 | |
254 | return 0; | |
255 | } | |
256 | ||
257 | int transport_subsystem_check_init(void) | |
258 | { | |
e3d6f909 AG |
259 | int ret; |
260 | ||
261 | if (sub_api_initialized) | |
c66ac9db NB |
262 | return 0; |
263 | /* | |
264 | * Request the loading of known TCM subsystem plugins.. | |
265 | */ | |
e3d6f909 AG |
266 | ret = transport_subsystem_reqmods(); |
267 | if (ret < 0) | |
268 | return ret; | |
c66ac9db | 269 | |
e3d6f909 | 270 | sub_api_initialized = 1; |
c66ac9db NB |
271 | return 0; |
272 | } | |
273 | ||
274 | struct se_session *transport_init_session(void) | |
275 | { | |
276 | struct se_session *se_sess; | |
277 | ||
278 | se_sess = kmem_cache_zalloc(se_sess_cache, GFP_KERNEL); | |
6708bb27 AG |
279 | if (!se_sess) { |
280 | pr_err("Unable to allocate struct se_session from" | |
c66ac9db NB |
281 | " se_sess_cache\n"); |
282 | return ERR_PTR(-ENOMEM); | |
283 | } | |
284 | INIT_LIST_HEAD(&se_sess->sess_list); | |
285 | INIT_LIST_HEAD(&se_sess->sess_acl_list); | |
c66ac9db NB |
286 | |
287 | return se_sess; | |
288 | } | |
289 | EXPORT_SYMBOL(transport_init_session); | |
290 | ||
291 | /* | |
292 | * Called with spin_lock_bh(&struct se_portal_group->session_lock called. | |
293 | */ | |
294 | void __transport_register_session( | |
295 | struct se_portal_group *se_tpg, | |
296 | struct se_node_acl *se_nacl, | |
297 | struct se_session *se_sess, | |
298 | void *fabric_sess_ptr) | |
299 | { | |
300 | unsigned char buf[PR_REG_ISID_LEN]; | |
301 | ||
302 | se_sess->se_tpg = se_tpg; | |
303 | se_sess->fabric_sess_ptr = fabric_sess_ptr; | |
304 | /* | |
305 | * Used by struct se_node_acl's under ConfigFS to locate active se_session-t | |
306 | * | |
307 | * Only set for struct se_session's that will actually be moving I/O. | |
308 | * eg: *NOT* discovery sessions. | |
309 | */ | |
310 | if (se_nacl) { | |
311 | /* | |
312 | * If the fabric module supports an ISID based TransportID, | |
313 | * save this value in binary from the fabric I_T Nexus now. | |
314 | */ | |
e3d6f909 | 315 | if (se_tpg->se_tpg_tfo->sess_get_initiator_sid != NULL) { |
c66ac9db | 316 | memset(&buf[0], 0, PR_REG_ISID_LEN); |
e3d6f909 | 317 | se_tpg->se_tpg_tfo->sess_get_initiator_sid(se_sess, |
c66ac9db NB |
318 | &buf[0], PR_REG_ISID_LEN); |
319 | se_sess->sess_bin_isid = get_unaligned_be64(&buf[0]); | |
320 | } | |
321 | spin_lock_irq(&se_nacl->nacl_sess_lock); | |
322 | /* | |
323 | * The se_nacl->nacl_sess pointer will be set to the | |
324 | * last active I_T Nexus for each struct se_node_acl. | |
325 | */ | |
326 | se_nacl->nacl_sess = se_sess; | |
327 | ||
328 | list_add_tail(&se_sess->sess_acl_list, | |
329 | &se_nacl->acl_sess_list); | |
330 | spin_unlock_irq(&se_nacl->nacl_sess_lock); | |
331 | } | |
332 | list_add_tail(&se_sess->sess_list, &se_tpg->tpg_sess_list); | |
333 | ||
6708bb27 | 334 | pr_debug("TARGET_CORE[%s]: Registered fabric_sess_ptr: %p\n", |
e3d6f909 | 335 | se_tpg->se_tpg_tfo->get_fabric_name(), se_sess->fabric_sess_ptr); |
c66ac9db NB |
336 | } |
337 | EXPORT_SYMBOL(__transport_register_session); | |
338 | ||
339 | void transport_register_session( | |
340 | struct se_portal_group *se_tpg, | |
341 | struct se_node_acl *se_nacl, | |
342 | struct se_session *se_sess, | |
343 | void *fabric_sess_ptr) | |
344 | { | |
345 | spin_lock_bh(&se_tpg->session_lock); | |
346 | __transport_register_session(se_tpg, se_nacl, se_sess, fabric_sess_ptr); | |
347 | spin_unlock_bh(&se_tpg->session_lock); | |
348 | } | |
349 | EXPORT_SYMBOL(transport_register_session); | |
350 | ||
351 | void transport_deregister_session_configfs(struct se_session *se_sess) | |
352 | { | |
353 | struct se_node_acl *se_nacl; | |
23388864 | 354 | unsigned long flags; |
c66ac9db NB |
355 | /* |
356 | * Used by struct se_node_acl's under ConfigFS to locate active struct se_session | |
357 | */ | |
358 | se_nacl = se_sess->se_node_acl; | |
6708bb27 | 359 | if (se_nacl) { |
23388864 | 360 | spin_lock_irqsave(&se_nacl->nacl_sess_lock, flags); |
c66ac9db NB |
361 | list_del(&se_sess->sess_acl_list); |
362 | /* | |
363 | * If the session list is empty, then clear the pointer. | |
364 | * Otherwise, set the struct se_session pointer from the tail | |
365 | * element of the per struct se_node_acl active session list. | |
366 | */ | |
367 | if (list_empty(&se_nacl->acl_sess_list)) | |
368 | se_nacl->nacl_sess = NULL; | |
369 | else { | |
370 | se_nacl->nacl_sess = container_of( | |
371 | se_nacl->acl_sess_list.prev, | |
372 | struct se_session, sess_acl_list); | |
373 | } | |
23388864 | 374 | spin_unlock_irqrestore(&se_nacl->nacl_sess_lock, flags); |
c66ac9db NB |
375 | } |
376 | } | |
377 | EXPORT_SYMBOL(transport_deregister_session_configfs); | |
378 | ||
379 | void transport_free_session(struct se_session *se_sess) | |
380 | { | |
381 | kmem_cache_free(se_sess_cache, se_sess); | |
382 | } | |
383 | EXPORT_SYMBOL(transport_free_session); | |
384 | ||
385 | void transport_deregister_session(struct se_session *se_sess) | |
386 | { | |
387 | struct se_portal_group *se_tpg = se_sess->se_tpg; | |
388 | struct se_node_acl *se_nacl; | |
e63a8e19 | 389 | unsigned long flags; |
c66ac9db | 390 | |
6708bb27 | 391 | if (!se_tpg) { |
c66ac9db NB |
392 | transport_free_session(se_sess); |
393 | return; | |
394 | } | |
c66ac9db | 395 | |
e63a8e19 | 396 | spin_lock_irqsave(&se_tpg->session_lock, flags); |
c66ac9db NB |
397 | list_del(&se_sess->sess_list); |
398 | se_sess->se_tpg = NULL; | |
399 | se_sess->fabric_sess_ptr = NULL; | |
e63a8e19 | 400 | spin_unlock_irqrestore(&se_tpg->session_lock, flags); |
c66ac9db NB |
401 | |
402 | /* | |
403 | * Determine if we need to do extra work for this initiator node's | |
404 | * struct se_node_acl if it had been previously dynamically generated. | |
405 | */ | |
406 | se_nacl = se_sess->se_node_acl; | |
6708bb27 | 407 | if (se_nacl) { |
e63a8e19 | 408 | spin_lock_irqsave(&se_tpg->acl_node_lock, flags); |
c66ac9db | 409 | if (se_nacl->dynamic_node_acl) { |
6708bb27 AG |
410 | if (!se_tpg->se_tpg_tfo->tpg_check_demo_mode_cache( |
411 | se_tpg)) { | |
c66ac9db NB |
412 | list_del(&se_nacl->acl_list); |
413 | se_tpg->num_node_acls--; | |
e63a8e19 | 414 | spin_unlock_irqrestore(&se_tpg->acl_node_lock, flags); |
c66ac9db NB |
415 | |
416 | core_tpg_wait_for_nacl_pr_ref(se_nacl); | |
c66ac9db | 417 | core_free_device_list_for_node(se_nacl, se_tpg); |
e3d6f909 | 418 | se_tpg->se_tpg_tfo->tpg_release_fabric_acl(se_tpg, |
c66ac9db | 419 | se_nacl); |
e63a8e19 | 420 | spin_lock_irqsave(&se_tpg->acl_node_lock, flags); |
c66ac9db NB |
421 | } |
422 | } | |
e63a8e19 | 423 | spin_unlock_irqrestore(&se_tpg->acl_node_lock, flags); |
c66ac9db NB |
424 | } |
425 | ||
426 | transport_free_session(se_sess); | |
427 | ||
6708bb27 | 428 | pr_debug("TARGET_CORE[%s]: Deregistered fabric_sess\n", |
e3d6f909 | 429 | se_tpg->se_tpg_tfo->get_fabric_name()); |
c66ac9db NB |
430 | } |
431 | EXPORT_SYMBOL(transport_deregister_session); | |
432 | ||
433 | /* | |
a1d8b49a | 434 | * Called with cmd->t_state_lock held. |
c66ac9db NB |
435 | */ |
436 | static void transport_all_task_dev_remove_state(struct se_cmd *cmd) | |
437 | { | |
438 | struct se_device *dev; | |
439 | struct se_task *task; | |
440 | unsigned long flags; | |
441 | ||
a1d8b49a | 442 | list_for_each_entry(task, &cmd->t_task_list, t_list) { |
c66ac9db | 443 | dev = task->se_dev; |
6708bb27 | 444 | if (!dev) |
c66ac9db NB |
445 | continue; |
446 | ||
447 | if (atomic_read(&task->task_active)) | |
448 | continue; | |
449 | ||
6708bb27 | 450 | if (!atomic_read(&task->task_state_active)) |
c66ac9db NB |
451 | continue; |
452 | ||
453 | spin_lock_irqsave(&dev->execute_task_lock, flags); | |
454 | list_del(&task->t_state_list); | |
6708bb27 AG |
455 | pr_debug("Removed ITT: 0x%08x dev: %p task[%p]\n", |
456 | cmd->se_tfo->get_task_tag(cmd), dev, task); | |
c66ac9db NB |
457 | spin_unlock_irqrestore(&dev->execute_task_lock, flags); |
458 | ||
459 | atomic_set(&task->task_state_active, 0); | |
a1d8b49a | 460 | atomic_dec(&cmd->t_task_cdbs_ex_left); |
c66ac9db NB |
461 | } |
462 | } | |
463 | ||
464 | /* transport_cmd_check_stop(): | |
465 | * | |
466 | * 'transport_off = 1' determines if t_transport_active should be cleared. | |
467 | * 'transport_off = 2' determines if task_dev_state should be removed. | |
468 | * | |
469 | * A non-zero u8 t_state sets cmd->t_state. | |
470 | * Returns 1 when command is stopped, else 0. | |
471 | */ | |
472 | static int transport_cmd_check_stop( | |
473 | struct se_cmd *cmd, | |
474 | int transport_off, | |
475 | u8 t_state) | |
476 | { | |
477 | unsigned long flags; | |
478 | ||
a1d8b49a | 479 | spin_lock_irqsave(&cmd->t_state_lock, flags); |
c66ac9db NB |
480 | /* |
481 | * Determine if IOCTL context caller in requesting the stopping of this | |
482 | * command for LUN shutdown purposes. | |
483 | */ | |
a1d8b49a | 484 | if (atomic_read(&cmd->transport_lun_stop)) { |
6708bb27 | 485 | pr_debug("%s:%d atomic_read(&cmd->transport_lun_stop)" |
c66ac9db | 486 | " == TRUE for ITT: 0x%08x\n", __func__, __LINE__, |
e3d6f909 | 487 | cmd->se_tfo->get_task_tag(cmd)); |
c66ac9db NB |
488 | |
489 | cmd->deferred_t_state = cmd->t_state; | |
490 | cmd->t_state = TRANSPORT_DEFERRED_CMD; | |
a1d8b49a | 491 | atomic_set(&cmd->t_transport_active, 0); |
c66ac9db NB |
492 | if (transport_off == 2) |
493 | transport_all_task_dev_remove_state(cmd); | |
a1d8b49a | 494 | spin_unlock_irqrestore(&cmd->t_state_lock, flags); |
c66ac9db | 495 | |
a1d8b49a | 496 | complete(&cmd->transport_lun_stop_comp); |
c66ac9db NB |
497 | return 1; |
498 | } | |
499 | /* | |
500 | * Determine if frontend context caller is requesting the stopping of | |
e3d6f909 | 501 | * this command for frontend exceptions. |
c66ac9db | 502 | */ |
a1d8b49a | 503 | if (atomic_read(&cmd->t_transport_stop)) { |
6708bb27 | 504 | pr_debug("%s:%d atomic_read(&cmd->t_transport_stop) ==" |
c66ac9db | 505 | " TRUE for ITT: 0x%08x\n", __func__, __LINE__, |
e3d6f909 | 506 | cmd->se_tfo->get_task_tag(cmd)); |
c66ac9db NB |
507 | |
508 | cmd->deferred_t_state = cmd->t_state; | |
509 | cmd->t_state = TRANSPORT_DEFERRED_CMD; | |
510 | if (transport_off == 2) | |
511 | transport_all_task_dev_remove_state(cmd); | |
512 | ||
513 | /* | |
514 | * Clear struct se_cmd->se_lun before the transport_off == 2 handoff | |
515 | * to FE. | |
516 | */ | |
517 | if (transport_off == 2) | |
518 | cmd->se_lun = NULL; | |
a1d8b49a | 519 | spin_unlock_irqrestore(&cmd->t_state_lock, flags); |
c66ac9db | 520 | |
a1d8b49a | 521 | complete(&cmd->t_transport_stop_comp); |
c66ac9db NB |
522 | return 1; |
523 | } | |
524 | if (transport_off) { | |
a1d8b49a | 525 | atomic_set(&cmd->t_transport_active, 0); |
c66ac9db NB |
526 | if (transport_off == 2) { |
527 | transport_all_task_dev_remove_state(cmd); | |
528 | /* | |
529 | * Clear struct se_cmd->se_lun before the transport_off == 2 | |
530 | * handoff to fabric module. | |
531 | */ | |
532 | cmd->se_lun = NULL; | |
533 | /* | |
534 | * Some fabric modules like tcm_loop can release | |
25985edc | 535 | * their internally allocated I/O reference now and |
c66ac9db NB |
536 | * struct se_cmd now. |
537 | */ | |
e3d6f909 | 538 | if (cmd->se_tfo->check_stop_free != NULL) { |
c66ac9db | 539 | spin_unlock_irqrestore( |
a1d8b49a | 540 | &cmd->t_state_lock, flags); |
c66ac9db | 541 | |
e3d6f909 | 542 | cmd->se_tfo->check_stop_free(cmd); |
c66ac9db NB |
543 | return 1; |
544 | } | |
545 | } | |
a1d8b49a | 546 | spin_unlock_irqrestore(&cmd->t_state_lock, flags); |
c66ac9db NB |
547 | |
548 | return 0; | |
549 | } else if (t_state) | |
550 | cmd->t_state = t_state; | |
a1d8b49a | 551 | spin_unlock_irqrestore(&cmd->t_state_lock, flags); |
c66ac9db NB |
552 | |
553 | return 0; | |
554 | } | |
555 | ||
556 | static int transport_cmd_check_stop_to_fabric(struct se_cmd *cmd) | |
557 | { | |
558 | return transport_cmd_check_stop(cmd, 2, 0); | |
559 | } | |
560 | ||
561 | static void transport_lun_remove_cmd(struct se_cmd *cmd) | |
562 | { | |
e3d6f909 | 563 | struct se_lun *lun = cmd->se_lun; |
c66ac9db NB |
564 | unsigned long flags; |
565 | ||
566 | if (!lun) | |
567 | return; | |
568 | ||
a1d8b49a | 569 | spin_lock_irqsave(&cmd->t_state_lock, flags); |
6708bb27 | 570 | if (!atomic_read(&cmd->transport_dev_active)) { |
a1d8b49a | 571 | spin_unlock_irqrestore(&cmd->t_state_lock, flags); |
c66ac9db NB |
572 | goto check_lun; |
573 | } | |
a1d8b49a | 574 | atomic_set(&cmd->transport_dev_active, 0); |
c66ac9db | 575 | transport_all_task_dev_remove_state(cmd); |
a1d8b49a | 576 | spin_unlock_irqrestore(&cmd->t_state_lock, flags); |
c66ac9db | 577 | |
c66ac9db NB |
578 | |
579 | check_lun: | |
580 | spin_lock_irqsave(&lun->lun_cmd_lock, flags); | |
a1d8b49a | 581 | if (atomic_read(&cmd->transport_lun_active)) { |
5951146d | 582 | list_del(&cmd->se_lun_node); |
a1d8b49a | 583 | atomic_set(&cmd->transport_lun_active, 0); |
c66ac9db | 584 | #if 0 |
6708bb27 | 585 | pr_debug("Removed ITT: 0x%08x from LUN LIST[%d]\n" |
e3d6f909 | 586 | cmd->se_tfo->get_task_tag(cmd), lun->unpacked_lun); |
c66ac9db NB |
587 | #endif |
588 | } | |
589 | spin_unlock_irqrestore(&lun->lun_cmd_lock, flags); | |
590 | } | |
591 | ||
592 | void transport_cmd_finish_abort(struct se_cmd *cmd, int remove) | |
593 | { | |
c66ac9db NB |
594 | transport_lun_remove_cmd(cmd); |
595 | ||
596 | if (transport_cmd_check_stop_to_fabric(cmd)) | |
597 | return; | |
77039d1e NB |
598 | if (remove) { |
599 | transport_remove_cmd_from_queue(cmd, &cmd->se_dev->dev_queue_obj); | |
e6a2573f | 600 | transport_put_cmd(cmd); |
77039d1e | 601 | } |
c66ac9db NB |
602 | } |
603 | ||
604 | void transport_cmd_finish_abort_tmr(struct se_cmd *cmd) | |
605 | { | |
5951146d | 606 | transport_remove_cmd_from_queue(cmd, &cmd->se_dev->dev_queue_obj); |
c66ac9db NB |
607 | |
608 | if (transport_cmd_check_stop_to_fabric(cmd)) | |
609 | return; | |
610 | ||
e6a2573f | 611 | transport_put_cmd(cmd); |
c66ac9db NB |
612 | } |
613 | ||
5951146d | 614 | static void transport_add_cmd_to_queue( |
c66ac9db NB |
615 | struct se_cmd *cmd, |
616 | int t_state) | |
617 | { | |
618 | struct se_device *dev = cmd->se_dev; | |
e3d6f909 | 619 | struct se_queue_obj *qobj = &dev->dev_queue_obj; |
c66ac9db NB |
620 | unsigned long flags; |
621 | ||
c66ac9db | 622 | if (t_state) { |
a1d8b49a | 623 | spin_lock_irqsave(&cmd->t_state_lock, flags); |
c66ac9db | 624 | cmd->t_state = t_state; |
a1d8b49a AG |
625 | atomic_set(&cmd->t_transport_active, 1); |
626 | spin_unlock_irqrestore(&cmd->t_state_lock, flags); | |
c66ac9db NB |
627 | } |
628 | ||
629 | spin_lock_irqsave(&qobj->cmd_queue_lock, flags); | |
79a7fef2 RD |
630 | |
631 | /* If the cmd is already on the list, remove it before we add it */ | |
632 | if (!list_empty(&cmd->se_queue_node)) | |
633 | list_del(&cmd->se_queue_node); | |
634 | else | |
635 | atomic_inc(&qobj->queue_cnt); | |
636 | ||
07bde79a NB |
637 | if (cmd->se_cmd_flags & SCF_EMULATE_QUEUE_FULL) { |
638 | cmd->se_cmd_flags &= ~SCF_EMULATE_QUEUE_FULL; | |
639 | list_add(&cmd->se_queue_node, &qobj->qobj_list); | |
640 | } else | |
641 | list_add_tail(&cmd->se_queue_node, &qobj->qobj_list); | |
79a7fef2 | 642 | atomic_set(&cmd->t_transport_queue_active, 1); |
c66ac9db NB |
643 | spin_unlock_irqrestore(&qobj->cmd_queue_lock, flags); |
644 | ||
c66ac9db | 645 | wake_up_interruptible(&qobj->thread_wq); |
c66ac9db NB |
646 | } |
647 | ||
5951146d AG |
648 | static struct se_cmd * |
649 | transport_get_cmd_from_queue(struct se_queue_obj *qobj) | |
c66ac9db | 650 | { |
5951146d | 651 | struct se_cmd *cmd; |
c66ac9db NB |
652 | unsigned long flags; |
653 | ||
654 | spin_lock_irqsave(&qobj->cmd_queue_lock, flags); | |
655 | if (list_empty(&qobj->qobj_list)) { | |
656 | spin_unlock_irqrestore(&qobj->cmd_queue_lock, flags); | |
657 | return NULL; | |
658 | } | |
5951146d | 659 | cmd = list_first_entry(&qobj->qobj_list, struct se_cmd, se_queue_node); |
c66ac9db | 660 | |
79a7fef2 | 661 | atomic_set(&cmd->t_transport_queue_active, 0); |
c66ac9db | 662 | |
79a7fef2 | 663 | list_del_init(&cmd->se_queue_node); |
c66ac9db NB |
664 | atomic_dec(&qobj->queue_cnt); |
665 | spin_unlock_irqrestore(&qobj->cmd_queue_lock, flags); | |
666 | ||
5951146d | 667 | return cmd; |
c66ac9db NB |
668 | } |
669 | ||
670 | static void transport_remove_cmd_from_queue(struct se_cmd *cmd, | |
671 | struct se_queue_obj *qobj) | |
672 | { | |
c66ac9db NB |
673 | unsigned long flags; |
674 | ||
675 | spin_lock_irqsave(&qobj->cmd_queue_lock, flags); | |
6708bb27 | 676 | if (!atomic_read(&cmd->t_transport_queue_active)) { |
c66ac9db NB |
677 | spin_unlock_irqrestore(&qobj->cmd_queue_lock, flags); |
678 | return; | |
679 | } | |
79a7fef2 RD |
680 | atomic_set(&cmd->t_transport_queue_active, 0); |
681 | atomic_dec(&qobj->queue_cnt); | |
682 | list_del_init(&cmd->se_queue_node); | |
c66ac9db NB |
683 | spin_unlock_irqrestore(&qobj->cmd_queue_lock, flags); |
684 | ||
a1d8b49a | 685 | if (atomic_read(&cmd->t_transport_queue_active)) { |
6708bb27 | 686 | pr_err("ITT: 0x%08x t_transport_queue_active: %d\n", |
e3d6f909 | 687 | cmd->se_tfo->get_task_tag(cmd), |
a1d8b49a | 688 | atomic_read(&cmd->t_transport_queue_active)); |
c66ac9db NB |
689 | } |
690 | } | |
691 | ||
692 | /* | |
693 | * Completion function used by TCM subsystem plugins (such as FILEIO) | |
694 | * for queueing up response from struct se_subsystem_api->do_task() | |
695 | */ | |
696 | void transport_complete_sync_cache(struct se_cmd *cmd, int good) | |
697 | { | |
a1d8b49a | 698 | struct se_task *task = list_entry(cmd->t_task_list.next, |
c66ac9db NB |
699 | struct se_task, t_list); |
700 | ||
701 | if (good) { | |
702 | cmd->scsi_status = SAM_STAT_GOOD; | |
703 | task->task_scsi_status = GOOD; | |
704 | } else { | |
705 | task->task_scsi_status = SAM_STAT_CHECK_CONDITION; | |
706 | task->task_error_status = PYX_TRANSPORT_ILLEGAL_REQUEST; | |
e3d6f909 | 707 | task->task_se_cmd->transport_error_status = |
c66ac9db NB |
708 | PYX_TRANSPORT_ILLEGAL_REQUEST; |
709 | } | |
710 | ||
711 | transport_complete_task(task, good); | |
712 | } | |
713 | EXPORT_SYMBOL(transport_complete_sync_cache); | |
714 | ||
715 | /* transport_complete_task(): | |
716 | * | |
717 | * Called from interrupt and non interrupt context depending | |
718 | * on the transport plugin. | |
719 | */ | |
720 | void transport_complete_task(struct se_task *task, int success) | |
721 | { | |
e3d6f909 | 722 | struct se_cmd *cmd = task->task_se_cmd; |
c66ac9db NB |
723 | struct se_device *dev = task->se_dev; |
724 | int t_state; | |
725 | unsigned long flags; | |
726 | #if 0 | |
6708bb27 | 727 | pr_debug("task: %p CDB: 0x%02x obj_ptr: %p\n", task, |
a1d8b49a | 728 | cmd->t_task_cdb[0], dev); |
c66ac9db | 729 | #endif |
e3d6f909 | 730 | if (dev) |
c66ac9db | 731 | atomic_inc(&dev->depth_left); |
c66ac9db | 732 | |
a1d8b49a | 733 | spin_lock_irqsave(&cmd->t_state_lock, flags); |
c66ac9db NB |
734 | atomic_set(&task->task_active, 0); |
735 | ||
736 | /* | |
737 | * See if any sense data exists, if so set the TASK_SENSE flag. | |
738 | * Also check for any other post completion work that needs to be | |
739 | * done by the plugins. | |
740 | */ | |
741 | if (dev && dev->transport->transport_complete) { | |
742 | if (dev->transport->transport_complete(task) != 0) { | |
743 | cmd->se_cmd_flags |= SCF_TRANSPORT_TASK_SENSE; | |
744 | task->task_sense = 1; | |
745 | success = 1; | |
746 | } | |
747 | } | |
748 | ||
749 | /* | |
750 | * See if we are waiting for outstanding struct se_task | |
751 | * to complete for an exception condition | |
752 | */ | |
753 | if (atomic_read(&task->task_stop)) { | |
754 | /* | |
a1d8b49a | 755 | * Decrement cmd->t_se_count if this task had |
c66ac9db NB |
756 | * previously thrown its timeout exception handler. |
757 | */ | |
758 | if (atomic_read(&task->task_timeout)) { | |
a1d8b49a | 759 | atomic_dec(&cmd->t_se_count); |
c66ac9db NB |
760 | atomic_set(&task->task_timeout, 0); |
761 | } | |
a1d8b49a | 762 | spin_unlock_irqrestore(&cmd->t_state_lock, flags); |
c66ac9db NB |
763 | |
764 | complete(&task->task_stop_comp); | |
765 | return; | |
766 | } | |
767 | /* | |
768 | * If the task's timeout handler has fired, use the t_task_cdbs_timeout | |
769 | * left counter to determine when the struct se_cmd is ready to be queued to | |
770 | * the processing thread. | |
771 | */ | |
772 | if (atomic_read(&task->task_timeout)) { | |
6708bb27 AG |
773 | if (!atomic_dec_and_test( |
774 | &cmd->t_task_cdbs_timeout_left)) { | |
a1d8b49a | 775 | spin_unlock_irqrestore(&cmd->t_state_lock, |
c66ac9db NB |
776 | flags); |
777 | return; | |
778 | } | |
779 | t_state = TRANSPORT_COMPLETE_TIMEOUT; | |
a1d8b49a | 780 | spin_unlock_irqrestore(&cmd->t_state_lock, flags); |
c66ac9db NB |
781 | |
782 | transport_add_cmd_to_queue(cmd, t_state); | |
783 | return; | |
784 | } | |
a1d8b49a | 785 | atomic_dec(&cmd->t_task_cdbs_timeout_left); |
c66ac9db NB |
786 | |
787 | /* | |
788 | * Decrement the outstanding t_task_cdbs_left count. The last | |
789 | * struct se_task from struct se_cmd will complete itself into the | |
790 | * device queue depending upon int success. | |
791 | */ | |
6708bb27 | 792 | if (!atomic_dec_and_test(&cmd->t_task_cdbs_left)) { |
c66ac9db | 793 | if (!success) |
a1d8b49a | 794 | cmd->t_tasks_failed = 1; |
c66ac9db | 795 | |
a1d8b49a | 796 | spin_unlock_irqrestore(&cmd->t_state_lock, flags); |
c66ac9db NB |
797 | return; |
798 | } | |
799 | ||
a1d8b49a | 800 | if (!success || cmd->t_tasks_failed) { |
c66ac9db NB |
801 | t_state = TRANSPORT_COMPLETE_FAILURE; |
802 | if (!task->task_error_status) { | |
803 | task->task_error_status = | |
804 | PYX_TRANSPORT_UNKNOWN_SAM_OPCODE; | |
805 | cmd->transport_error_status = | |
806 | PYX_TRANSPORT_UNKNOWN_SAM_OPCODE; | |
807 | } | |
808 | } else { | |
a1d8b49a | 809 | atomic_set(&cmd->t_transport_complete, 1); |
c66ac9db NB |
810 | t_state = TRANSPORT_COMPLETE_OK; |
811 | } | |
a1d8b49a | 812 | spin_unlock_irqrestore(&cmd->t_state_lock, flags); |
c66ac9db NB |
813 | |
814 | transport_add_cmd_to_queue(cmd, t_state); | |
815 | } | |
816 | EXPORT_SYMBOL(transport_complete_task); | |
817 | ||
818 | /* | |
819 | * Called by transport_add_tasks_from_cmd() once a struct se_cmd's | |
820 | * struct se_task list are ready to be added to the active execution list | |
821 | * struct se_device | |
822 | ||
823 | * Called with se_dev_t->execute_task_lock called. | |
824 | */ | |
825 | static inline int transport_add_task_check_sam_attr( | |
826 | struct se_task *task, | |
827 | struct se_task *task_prev, | |
828 | struct se_device *dev) | |
829 | { | |
830 | /* | |
831 | * No SAM Task attribute emulation enabled, add to tail of | |
832 | * execution queue | |
833 | */ | |
834 | if (dev->dev_task_attr_type != SAM_TASK_ATTR_EMULATED) { | |
835 | list_add_tail(&task->t_execute_list, &dev->execute_task_list); | |
836 | return 0; | |
837 | } | |
838 | /* | |
839 | * HEAD_OF_QUEUE attribute for received CDB, which means | |
840 | * the first task that is associated with a struct se_cmd goes to | |
841 | * head of the struct se_device->execute_task_list, and task_prev | |
842 | * after that for each subsequent task | |
843 | */ | |
e66ecd50 | 844 | if (task->task_se_cmd->sam_task_attr == MSG_HEAD_TAG) { |
c66ac9db NB |
845 | list_add(&task->t_execute_list, |
846 | (task_prev != NULL) ? | |
847 | &task_prev->t_execute_list : | |
848 | &dev->execute_task_list); | |
849 | ||
6708bb27 | 850 | pr_debug("Set HEAD_OF_QUEUE for task CDB: 0x%02x" |
c66ac9db | 851 | " in execution queue\n", |
6708bb27 | 852 | task->task_se_cmd->t_task_cdb[0]); |
c66ac9db NB |
853 | return 1; |
854 | } | |
855 | /* | |
856 | * For ORDERED, SIMPLE or UNTAGGED attribute tasks once they have been | |
857 | * transitioned from Dermant -> Active state, and are added to the end | |
858 | * of the struct se_device->execute_task_list | |
859 | */ | |
860 | list_add_tail(&task->t_execute_list, &dev->execute_task_list); | |
861 | return 0; | |
862 | } | |
863 | ||
864 | /* __transport_add_task_to_execute_queue(): | |
865 | * | |
866 | * Called with se_dev_t->execute_task_lock called. | |
867 | */ | |
868 | static void __transport_add_task_to_execute_queue( | |
869 | struct se_task *task, | |
870 | struct se_task *task_prev, | |
871 | struct se_device *dev) | |
872 | { | |
873 | int head_of_queue; | |
874 | ||
875 | head_of_queue = transport_add_task_check_sam_attr(task, task_prev, dev); | |
876 | atomic_inc(&dev->execute_tasks); | |
877 | ||
878 | if (atomic_read(&task->task_state_active)) | |
879 | return; | |
880 | /* | |
881 | * Determine if this task needs to go to HEAD_OF_QUEUE for the | |
882 | * state list as well. Running with SAM Task Attribute emulation | |
883 | * will always return head_of_queue == 0 here | |
884 | */ | |
885 | if (head_of_queue) | |
886 | list_add(&task->t_state_list, (task_prev) ? | |
887 | &task_prev->t_state_list : | |
888 | &dev->state_task_list); | |
889 | else | |
890 | list_add_tail(&task->t_state_list, &dev->state_task_list); | |
891 | ||
892 | atomic_set(&task->task_state_active, 1); | |
893 | ||
6708bb27 | 894 | pr_debug("Added ITT: 0x%08x task[%p] to dev: %p\n", |
e3d6f909 | 895 | task->task_se_cmd->se_tfo->get_task_tag(task->task_se_cmd), |
c66ac9db NB |
896 | task, dev); |
897 | } | |
898 | ||
899 | static void transport_add_tasks_to_state_queue(struct se_cmd *cmd) | |
900 | { | |
901 | struct se_device *dev; | |
902 | struct se_task *task; | |
903 | unsigned long flags; | |
904 | ||
a1d8b49a AG |
905 | spin_lock_irqsave(&cmd->t_state_lock, flags); |
906 | list_for_each_entry(task, &cmd->t_task_list, t_list) { | |
c66ac9db NB |
907 | dev = task->se_dev; |
908 | ||
909 | if (atomic_read(&task->task_state_active)) | |
910 | continue; | |
911 | ||
912 | spin_lock(&dev->execute_task_lock); | |
913 | list_add_tail(&task->t_state_list, &dev->state_task_list); | |
914 | atomic_set(&task->task_state_active, 1); | |
915 | ||
6708bb27 AG |
916 | pr_debug("Added ITT: 0x%08x task[%p] to dev: %p\n", |
917 | task->task_se_cmd->se_tfo->get_task_tag( | |
c66ac9db NB |
918 | task->task_se_cmd), task, dev); |
919 | ||
920 | spin_unlock(&dev->execute_task_lock); | |
921 | } | |
a1d8b49a | 922 | spin_unlock_irqrestore(&cmd->t_state_lock, flags); |
c66ac9db NB |
923 | } |
924 | ||
925 | static void transport_add_tasks_from_cmd(struct se_cmd *cmd) | |
926 | { | |
5951146d | 927 | struct se_device *dev = cmd->se_dev; |
c66ac9db NB |
928 | struct se_task *task, *task_prev = NULL; |
929 | unsigned long flags; | |
930 | ||
931 | spin_lock_irqsave(&dev->execute_task_lock, flags); | |
a1d8b49a | 932 | list_for_each_entry(task, &cmd->t_task_list, t_list) { |
c66ac9db NB |
933 | if (atomic_read(&task->task_execute_queue)) |
934 | continue; | |
935 | /* | |
936 | * __transport_add_task_to_execute_queue() handles the | |
937 | * SAM Task Attribute emulation if enabled | |
938 | */ | |
939 | __transport_add_task_to_execute_queue(task, task_prev, dev); | |
940 | atomic_set(&task->task_execute_queue, 1); | |
941 | task_prev = task; | |
942 | } | |
943 | spin_unlock_irqrestore(&dev->execute_task_lock, flags); | |
c66ac9db NB |
944 | } |
945 | ||
946 | /* transport_remove_task_from_execute_queue(): | |
947 | * | |
948 | * | |
949 | */ | |
52208ae3 | 950 | void transport_remove_task_from_execute_queue( |
c66ac9db NB |
951 | struct se_task *task, |
952 | struct se_device *dev) | |
953 | { | |
954 | unsigned long flags; | |
955 | ||
af57c3ac NB |
956 | if (atomic_read(&task->task_execute_queue) == 0) { |
957 | dump_stack(); | |
958 | return; | |
959 | } | |
960 | ||
c66ac9db NB |
961 | spin_lock_irqsave(&dev->execute_task_lock, flags); |
962 | list_del(&task->t_execute_list); | |
af57c3ac | 963 | atomic_set(&task->task_execute_queue, 0); |
c66ac9db NB |
964 | atomic_dec(&dev->execute_tasks); |
965 | spin_unlock_irqrestore(&dev->execute_task_lock, flags); | |
966 | } | |
967 | ||
07bde79a NB |
968 | /* |
969 | * Handle QUEUE_FULL / -EAGAIN status | |
970 | */ | |
971 | ||
972 | static void target_qf_do_work(struct work_struct *work) | |
973 | { | |
974 | struct se_device *dev = container_of(work, struct se_device, | |
975 | qf_work_queue); | |
bcac364a | 976 | LIST_HEAD(qf_cmd_list); |
07bde79a NB |
977 | struct se_cmd *cmd, *cmd_tmp; |
978 | ||
979 | spin_lock_irq(&dev->qf_cmd_lock); | |
bcac364a RD |
980 | list_splice_init(&dev->qf_cmd_list, &qf_cmd_list); |
981 | spin_unlock_irq(&dev->qf_cmd_lock); | |
07bde79a | 982 | |
bcac364a | 983 | list_for_each_entry_safe(cmd, cmd_tmp, &qf_cmd_list, se_qf_node) { |
07bde79a NB |
984 | list_del(&cmd->se_qf_node); |
985 | atomic_dec(&dev->dev_qf_count); | |
986 | smp_mb__after_atomic_dec(); | |
07bde79a | 987 | |
6708bb27 | 988 | pr_debug("Processing %s cmd: %p QUEUE_FULL in work queue" |
07bde79a NB |
989 | " context: %s\n", cmd->se_tfo->get_fabric_name(), cmd, |
990 | (cmd->t_state == TRANSPORT_COMPLETE_OK) ? "COMPLETE_OK" : | |
991 | (cmd->t_state == TRANSPORT_COMPLETE_QF_WP) ? "WRITE_PENDING" | |
992 | : "UNKNOWN"); | |
993 | /* | |
994 | * The SCF_EMULATE_QUEUE_FULL flag will be cleared once se_cmd | |
995 | * has been added to head of queue | |
996 | */ | |
997 | transport_add_cmd_to_queue(cmd, cmd->t_state); | |
07bde79a | 998 | } |
07bde79a NB |
999 | } |
1000 | ||
c66ac9db NB |
1001 | unsigned char *transport_dump_cmd_direction(struct se_cmd *cmd) |
1002 | { | |
1003 | switch (cmd->data_direction) { | |
1004 | case DMA_NONE: | |
1005 | return "NONE"; | |
1006 | case DMA_FROM_DEVICE: | |
1007 | return "READ"; | |
1008 | case DMA_TO_DEVICE: | |
1009 | return "WRITE"; | |
1010 | case DMA_BIDIRECTIONAL: | |
1011 | return "BIDI"; | |
1012 | default: | |
1013 | break; | |
1014 | } | |
1015 | ||
1016 | return "UNKNOWN"; | |
1017 | } | |
1018 | ||
1019 | void transport_dump_dev_state( | |
1020 | struct se_device *dev, | |
1021 | char *b, | |
1022 | int *bl) | |
1023 | { | |
1024 | *bl += sprintf(b + *bl, "Status: "); | |
1025 | switch (dev->dev_status) { | |
1026 | case TRANSPORT_DEVICE_ACTIVATED: | |
1027 | *bl += sprintf(b + *bl, "ACTIVATED"); | |
1028 | break; | |
1029 | case TRANSPORT_DEVICE_DEACTIVATED: | |
1030 | *bl += sprintf(b + *bl, "DEACTIVATED"); | |
1031 | break; | |
1032 | case TRANSPORT_DEVICE_SHUTDOWN: | |
1033 | *bl += sprintf(b + *bl, "SHUTDOWN"); | |
1034 | break; | |
1035 | case TRANSPORT_DEVICE_OFFLINE_ACTIVATED: | |
1036 | case TRANSPORT_DEVICE_OFFLINE_DEACTIVATED: | |
1037 | *bl += sprintf(b + *bl, "OFFLINE"); | |
1038 | break; | |
1039 | default: | |
1040 | *bl += sprintf(b + *bl, "UNKNOWN=%d", dev->dev_status); | |
1041 | break; | |
1042 | } | |
1043 | ||
1044 | *bl += sprintf(b + *bl, " Execute/Left/Max Queue Depth: %d/%d/%d", | |
1045 | atomic_read(&dev->execute_tasks), atomic_read(&dev->depth_left), | |
1046 | dev->queue_depth); | |
1047 | *bl += sprintf(b + *bl, " SectorSize: %u MaxSectors: %u\n", | |
e3d6f909 | 1048 | dev->se_sub_dev->se_dev_attrib.block_size, dev->se_sub_dev->se_dev_attrib.max_sectors); |
c66ac9db NB |
1049 | *bl += sprintf(b + *bl, " "); |
1050 | } | |
1051 | ||
1052 | /* transport_release_all_cmds(): | |
1053 | * | |
1054 | * | |
1055 | */ | |
1056 | static void transport_release_all_cmds(struct se_device *dev) | |
1057 | { | |
5951146d | 1058 | struct se_cmd *cmd, *tcmd; |
c66ac9db NB |
1059 | int bug_out = 0, t_state; |
1060 | unsigned long flags; | |
1061 | ||
e3d6f909 | 1062 | spin_lock_irqsave(&dev->dev_queue_obj.cmd_queue_lock, flags); |
5951146d AG |
1063 | list_for_each_entry_safe(cmd, tcmd, &dev->dev_queue_obj.qobj_list, |
1064 | se_queue_node) { | |
1065 | t_state = cmd->t_state; | |
79a7fef2 | 1066 | list_del_init(&cmd->se_queue_node); |
e3d6f909 | 1067 | spin_unlock_irqrestore(&dev->dev_queue_obj.cmd_queue_lock, |
c66ac9db NB |
1068 | flags); |
1069 | ||
6708bb27 | 1070 | pr_err("Releasing ITT: 0x%08x, i_state: %u," |
c66ac9db | 1071 | " t_state: %u directly\n", |
e3d6f909 AG |
1072 | cmd->se_tfo->get_task_tag(cmd), |
1073 | cmd->se_tfo->get_cmd_state(cmd), t_state); | |
c66ac9db | 1074 | |
d3df7825 | 1075 | transport_put_cmd(cmd); |
c66ac9db NB |
1076 | bug_out = 1; |
1077 | ||
e3d6f909 | 1078 | spin_lock_irqsave(&dev->dev_queue_obj.cmd_queue_lock, flags); |
c66ac9db | 1079 | } |
e3d6f909 | 1080 | spin_unlock_irqrestore(&dev->dev_queue_obj.cmd_queue_lock, flags); |
c66ac9db NB |
1081 | #if 0 |
1082 | if (bug_out) | |
1083 | BUG(); | |
1084 | #endif | |
1085 | } | |
1086 | ||
1087 | void transport_dump_vpd_proto_id( | |
1088 | struct t10_vpd *vpd, | |
1089 | unsigned char *p_buf, | |
1090 | int p_buf_len) | |
1091 | { | |
1092 | unsigned char buf[VPD_TMP_BUF_SIZE]; | |
1093 | int len; | |
1094 | ||
1095 | memset(buf, 0, VPD_TMP_BUF_SIZE); | |
1096 | len = sprintf(buf, "T10 VPD Protocol Identifier: "); | |
1097 | ||
1098 | switch (vpd->protocol_identifier) { | |
1099 | case 0x00: | |
1100 | sprintf(buf+len, "Fibre Channel\n"); | |
1101 | break; | |
1102 | case 0x10: | |
1103 | sprintf(buf+len, "Parallel SCSI\n"); | |
1104 | break; | |
1105 | case 0x20: | |
1106 | sprintf(buf+len, "SSA\n"); | |
1107 | break; | |
1108 | case 0x30: | |
1109 | sprintf(buf+len, "IEEE 1394\n"); | |
1110 | break; | |
1111 | case 0x40: | |
1112 | sprintf(buf+len, "SCSI Remote Direct Memory Access" | |
1113 | " Protocol\n"); | |
1114 | break; | |
1115 | case 0x50: | |
1116 | sprintf(buf+len, "Internet SCSI (iSCSI)\n"); | |
1117 | break; | |
1118 | case 0x60: | |
1119 | sprintf(buf+len, "SAS Serial SCSI Protocol\n"); | |
1120 | break; | |
1121 | case 0x70: | |
1122 | sprintf(buf+len, "Automation/Drive Interface Transport" | |
1123 | " Protocol\n"); | |
1124 | break; | |
1125 | case 0x80: | |
1126 | sprintf(buf+len, "AT Attachment Interface ATA/ATAPI\n"); | |
1127 | break; | |
1128 | default: | |
1129 | sprintf(buf+len, "Unknown 0x%02x\n", | |
1130 | vpd->protocol_identifier); | |
1131 | break; | |
1132 | } | |
1133 | ||
1134 | if (p_buf) | |
1135 | strncpy(p_buf, buf, p_buf_len); | |
1136 | else | |
6708bb27 | 1137 | pr_debug("%s", buf); |
c66ac9db NB |
1138 | } |
1139 | ||
1140 | void | |
1141 | transport_set_vpd_proto_id(struct t10_vpd *vpd, unsigned char *page_83) | |
1142 | { | |
1143 | /* | |
1144 | * Check if the Protocol Identifier Valid (PIV) bit is set.. | |
1145 | * | |
1146 | * from spc3r23.pdf section 7.5.1 | |
1147 | */ | |
1148 | if (page_83[1] & 0x80) { | |
1149 | vpd->protocol_identifier = (page_83[0] & 0xf0); | |
1150 | vpd->protocol_identifier_set = 1; | |
1151 | transport_dump_vpd_proto_id(vpd, NULL, 0); | |
1152 | } | |
1153 | } | |
1154 | EXPORT_SYMBOL(transport_set_vpd_proto_id); | |
1155 | ||
1156 | int transport_dump_vpd_assoc( | |
1157 | struct t10_vpd *vpd, | |
1158 | unsigned char *p_buf, | |
1159 | int p_buf_len) | |
1160 | { | |
1161 | unsigned char buf[VPD_TMP_BUF_SIZE]; | |
e3d6f909 AG |
1162 | int ret = 0; |
1163 | int len; | |
c66ac9db NB |
1164 | |
1165 | memset(buf, 0, VPD_TMP_BUF_SIZE); | |
1166 | len = sprintf(buf, "T10 VPD Identifier Association: "); | |
1167 | ||
1168 | switch (vpd->association) { | |
1169 | case 0x00: | |
1170 | sprintf(buf+len, "addressed logical unit\n"); | |
1171 | break; | |
1172 | case 0x10: | |
1173 | sprintf(buf+len, "target port\n"); | |
1174 | break; | |
1175 | case 0x20: | |
1176 | sprintf(buf+len, "SCSI target device\n"); | |
1177 | break; | |
1178 | default: | |
1179 | sprintf(buf+len, "Unknown 0x%02x\n", vpd->association); | |
e3d6f909 | 1180 | ret = -EINVAL; |
c66ac9db NB |
1181 | break; |
1182 | } | |
1183 | ||
1184 | if (p_buf) | |
1185 | strncpy(p_buf, buf, p_buf_len); | |
1186 | else | |
6708bb27 | 1187 | pr_debug("%s", buf); |
c66ac9db NB |
1188 | |
1189 | return ret; | |
1190 | } | |
1191 | ||
1192 | int transport_set_vpd_assoc(struct t10_vpd *vpd, unsigned char *page_83) | |
1193 | { | |
1194 | /* | |
1195 | * The VPD identification association.. | |
1196 | * | |
1197 | * from spc3r23.pdf Section 7.6.3.1 Table 297 | |
1198 | */ | |
1199 | vpd->association = (page_83[1] & 0x30); | |
1200 | return transport_dump_vpd_assoc(vpd, NULL, 0); | |
1201 | } | |
1202 | EXPORT_SYMBOL(transport_set_vpd_assoc); | |
1203 | ||
1204 | int transport_dump_vpd_ident_type( | |
1205 | struct t10_vpd *vpd, | |
1206 | unsigned char *p_buf, | |
1207 | int p_buf_len) | |
1208 | { | |
1209 | unsigned char buf[VPD_TMP_BUF_SIZE]; | |
e3d6f909 AG |
1210 | int ret = 0; |
1211 | int len; | |
c66ac9db NB |
1212 | |
1213 | memset(buf, 0, VPD_TMP_BUF_SIZE); | |
1214 | len = sprintf(buf, "T10 VPD Identifier Type: "); | |
1215 | ||
1216 | switch (vpd->device_identifier_type) { | |
1217 | case 0x00: | |
1218 | sprintf(buf+len, "Vendor specific\n"); | |
1219 | break; | |
1220 | case 0x01: | |
1221 | sprintf(buf+len, "T10 Vendor ID based\n"); | |
1222 | break; | |
1223 | case 0x02: | |
1224 | sprintf(buf+len, "EUI-64 based\n"); | |
1225 | break; | |
1226 | case 0x03: | |
1227 | sprintf(buf+len, "NAA\n"); | |
1228 | break; | |
1229 | case 0x04: | |
1230 | sprintf(buf+len, "Relative target port identifier\n"); | |
1231 | break; | |
1232 | case 0x08: | |
1233 | sprintf(buf+len, "SCSI name string\n"); | |
1234 | break; | |
1235 | default: | |
1236 | sprintf(buf+len, "Unsupported: 0x%02x\n", | |
1237 | vpd->device_identifier_type); | |
e3d6f909 | 1238 | ret = -EINVAL; |
c66ac9db NB |
1239 | break; |
1240 | } | |
1241 | ||
e3d6f909 AG |
1242 | if (p_buf) { |
1243 | if (p_buf_len < strlen(buf)+1) | |
1244 | return -EINVAL; | |
c66ac9db | 1245 | strncpy(p_buf, buf, p_buf_len); |
e3d6f909 | 1246 | } else { |
6708bb27 | 1247 | pr_debug("%s", buf); |
e3d6f909 | 1248 | } |
c66ac9db NB |
1249 | |
1250 | return ret; | |
1251 | } | |
1252 | ||
1253 | int transport_set_vpd_ident_type(struct t10_vpd *vpd, unsigned char *page_83) | |
1254 | { | |
1255 | /* | |
1256 | * The VPD identifier type.. | |
1257 | * | |
1258 | * from spc3r23.pdf Section 7.6.3.1 Table 298 | |
1259 | */ | |
1260 | vpd->device_identifier_type = (page_83[1] & 0x0f); | |
1261 | return transport_dump_vpd_ident_type(vpd, NULL, 0); | |
1262 | } | |
1263 | EXPORT_SYMBOL(transport_set_vpd_ident_type); | |
1264 | ||
1265 | int transport_dump_vpd_ident( | |
1266 | struct t10_vpd *vpd, | |
1267 | unsigned char *p_buf, | |
1268 | int p_buf_len) | |
1269 | { | |
1270 | unsigned char buf[VPD_TMP_BUF_SIZE]; | |
1271 | int ret = 0; | |
1272 | ||
1273 | memset(buf, 0, VPD_TMP_BUF_SIZE); | |
1274 | ||
1275 | switch (vpd->device_identifier_code_set) { | |
1276 | case 0x01: /* Binary */ | |
1277 | sprintf(buf, "T10 VPD Binary Device Identifier: %s\n", | |
1278 | &vpd->device_identifier[0]); | |
1279 | break; | |
1280 | case 0x02: /* ASCII */ | |
1281 | sprintf(buf, "T10 VPD ASCII Device Identifier: %s\n", | |
1282 | &vpd->device_identifier[0]); | |
1283 | break; | |
1284 | case 0x03: /* UTF-8 */ | |
1285 | sprintf(buf, "T10 VPD UTF-8 Device Identifier: %s\n", | |
1286 | &vpd->device_identifier[0]); | |
1287 | break; | |
1288 | default: | |
1289 | sprintf(buf, "T10 VPD Device Identifier encoding unsupported:" | |
1290 | " 0x%02x", vpd->device_identifier_code_set); | |
e3d6f909 | 1291 | ret = -EINVAL; |
c66ac9db NB |
1292 | break; |
1293 | } | |
1294 | ||
1295 | if (p_buf) | |
1296 | strncpy(p_buf, buf, p_buf_len); | |
1297 | else | |
6708bb27 | 1298 | pr_debug("%s", buf); |
c66ac9db NB |
1299 | |
1300 | return ret; | |
1301 | } | |
1302 | ||
1303 | int | |
1304 | transport_set_vpd_ident(struct t10_vpd *vpd, unsigned char *page_83) | |
1305 | { | |
1306 | static const char hex_str[] = "0123456789abcdef"; | |
1307 | int j = 0, i = 4; /* offset to start of the identifer */ | |
1308 | ||
1309 | /* | |
1310 | * The VPD Code Set (encoding) | |
1311 | * | |
1312 | * from spc3r23.pdf Section 7.6.3.1 Table 296 | |
1313 | */ | |
1314 | vpd->device_identifier_code_set = (page_83[0] & 0x0f); | |
1315 | switch (vpd->device_identifier_code_set) { | |
1316 | case 0x01: /* Binary */ | |
1317 | vpd->device_identifier[j++] = | |
1318 | hex_str[vpd->device_identifier_type]; | |
1319 | while (i < (4 + page_83[3])) { | |
1320 | vpd->device_identifier[j++] = | |
1321 | hex_str[(page_83[i] & 0xf0) >> 4]; | |
1322 | vpd->device_identifier[j++] = | |
1323 | hex_str[page_83[i] & 0x0f]; | |
1324 | i++; | |
1325 | } | |
1326 | break; | |
1327 | case 0x02: /* ASCII */ | |
1328 | case 0x03: /* UTF-8 */ | |
1329 | while (i < (4 + page_83[3])) | |
1330 | vpd->device_identifier[j++] = page_83[i++]; | |
1331 | break; | |
1332 | default: | |
1333 | break; | |
1334 | } | |
1335 | ||
1336 | return transport_dump_vpd_ident(vpd, NULL, 0); | |
1337 | } | |
1338 | EXPORT_SYMBOL(transport_set_vpd_ident); | |
1339 | ||
1340 | static void core_setup_task_attr_emulation(struct se_device *dev) | |
1341 | { | |
1342 | /* | |
1343 | * If this device is from Target_Core_Mod/pSCSI, disable the | |
1344 | * SAM Task Attribute emulation. | |
1345 | * | |
1346 | * This is currently not available in upsream Linux/SCSI Target | |
1347 | * mode code, and is assumed to be disabled while using TCM/pSCSI. | |
1348 | */ | |
e3d6f909 | 1349 | if (dev->transport->transport_type == TRANSPORT_PLUGIN_PHBA_PDEV) { |
c66ac9db NB |
1350 | dev->dev_task_attr_type = SAM_TASK_ATTR_PASSTHROUGH; |
1351 | return; | |
1352 | } | |
1353 | ||
1354 | dev->dev_task_attr_type = SAM_TASK_ATTR_EMULATED; | |
6708bb27 | 1355 | pr_debug("%s: Using SAM_TASK_ATTR_EMULATED for SPC: 0x%02x" |
e3d6f909 AG |
1356 | " device\n", dev->transport->name, |
1357 | dev->transport->get_device_rev(dev)); | |
c66ac9db NB |
1358 | } |
1359 | ||
1360 | static void scsi_dump_inquiry(struct se_device *dev) | |
1361 | { | |
e3d6f909 | 1362 | struct t10_wwn *wwn = &dev->se_sub_dev->t10_wwn; |
c66ac9db NB |
1363 | int i, device_type; |
1364 | /* | |
1365 | * Print Linux/SCSI style INQUIRY formatting to the kernel ring buffer | |
1366 | */ | |
6708bb27 | 1367 | pr_debug(" Vendor: "); |
c66ac9db NB |
1368 | for (i = 0; i < 8; i++) |
1369 | if (wwn->vendor[i] >= 0x20) | |
6708bb27 | 1370 | pr_debug("%c", wwn->vendor[i]); |
c66ac9db | 1371 | else |
6708bb27 | 1372 | pr_debug(" "); |
c66ac9db | 1373 | |
6708bb27 | 1374 | pr_debug(" Model: "); |
c66ac9db NB |
1375 | for (i = 0; i < 16; i++) |
1376 | if (wwn->model[i] >= 0x20) | |
6708bb27 | 1377 | pr_debug("%c", wwn->model[i]); |
c66ac9db | 1378 | else |
6708bb27 | 1379 | pr_debug(" "); |
c66ac9db | 1380 | |
6708bb27 | 1381 | pr_debug(" Revision: "); |
c66ac9db NB |
1382 | for (i = 0; i < 4; i++) |
1383 | if (wwn->revision[i] >= 0x20) | |
6708bb27 | 1384 | pr_debug("%c", wwn->revision[i]); |
c66ac9db | 1385 | else |
6708bb27 | 1386 | pr_debug(" "); |
c66ac9db | 1387 | |
6708bb27 | 1388 | pr_debug("\n"); |
c66ac9db | 1389 | |
e3d6f909 | 1390 | device_type = dev->transport->get_device_type(dev); |
6708bb27 AG |
1391 | pr_debug(" Type: %s ", scsi_device_type(device_type)); |
1392 | pr_debug(" ANSI SCSI revision: %02x\n", | |
e3d6f909 | 1393 | dev->transport->get_device_rev(dev)); |
c66ac9db NB |
1394 | } |
1395 | ||
1396 | struct se_device *transport_add_device_to_core_hba( | |
1397 | struct se_hba *hba, | |
1398 | struct se_subsystem_api *transport, | |
1399 | struct se_subsystem_dev *se_dev, | |
1400 | u32 device_flags, | |
1401 | void *transport_dev, | |
1402 | struct se_dev_limits *dev_limits, | |
1403 | const char *inquiry_prod, | |
1404 | const char *inquiry_rev) | |
1405 | { | |
12a18bdc | 1406 | int force_pt; |
c66ac9db NB |
1407 | struct se_device *dev; |
1408 | ||
1409 | dev = kzalloc(sizeof(struct se_device), GFP_KERNEL); | |
6708bb27 AG |
1410 | if (!dev) { |
1411 | pr_err("Unable to allocate memory for se_dev_t\n"); | |
c66ac9db NB |
1412 | return NULL; |
1413 | } | |
c66ac9db | 1414 | |
e3d6f909 | 1415 | transport_init_queue_obj(&dev->dev_queue_obj); |
c66ac9db NB |
1416 | dev->dev_flags = device_flags; |
1417 | dev->dev_status |= TRANSPORT_DEVICE_DEACTIVATED; | |
5951146d | 1418 | dev->dev_ptr = transport_dev; |
c66ac9db NB |
1419 | dev->se_hba = hba; |
1420 | dev->se_sub_dev = se_dev; | |
1421 | dev->transport = transport; | |
1422 | atomic_set(&dev->active_cmds, 0); | |
1423 | INIT_LIST_HEAD(&dev->dev_list); | |
1424 | INIT_LIST_HEAD(&dev->dev_sep_list); | |
1425 | INIT_LIST_HEAD(&dev->dev_tmr_list); | |
1426 | INIT_LIST_HEAD(&dev->execute_task_list); | |
1427 | INIT_LIST_HEAD(&dev->delayed_cmd_list); | |
1428 | INIT_LIST_HEAD(&dev->ordered_cmd_list); | |
1429 | INIT_LIST_HEAD(&dev->state_task_list); | |
07bde79a | 1430 | INIT_LIST_HEAD(&dev->qf_cmd_list); |
c66ac9db NB |
1431 | spin_lock_init(&dev->execute_task_lock); |
1432 | spin_lock_init(&dev->delayed_cmd_lock); | |
1433 | spin_lock_init(&dev->ordered_cmd_lock); | |
1434 | spin_lock_init(&dev->state_task_lock); | |
1435 | spin_lock_init(&dev->dev_alua_lock); | |
1436 | spin_lock_init(&dev->dev_reservation_lock); | |
1437 | spin_lock_init(&dev->dev_status_lock); | |
1438 | spin_lock_init(&dev->dev_status_thr_lock); | |
1439 | spin_lock_init(&dev->se_port_lock); | |
1440 | spin_lock_init(&dev->se_tmr_lock); | |
07bde79a | 1441 | spin_lock_init(&dev->qf_cmd_lock); |
c66ac9db NB |
1442 | |
1443 | dev->queue_depth = dev_limits->queue_depth; | |
1444 | atomic_set(&dev->depth_left, dev->queue_depth); | |
1445 | atomic_set(&dev->dev_ordered_id, 0); | |
1446 | ||
1447 | se_dev_set_default_attribs(dev, dev_limits); | |
1448 | ||
1449 | dev->dev_index = scsi_get_new_index(SCSI_DEVICE_INDEX); | |
1450 | dev->creation_time = get_jiffies_64(); | |
1451 | spin_lock_init(&dev->stats_lock); | |
1452 | ||
1453 | spin_lock(&hba->device_lock); | |
1454 | list_add_tail(&dev->dev_list, &hba->hba_dev_list); | |
1455 | hba->dev_count++; | |
1456 | spin_unlock(&hba->device_lock); | |
1457 | /* | |
1458 | * Setup the SAM Task Attribute emulation for struct se_device | |
1459 | */ | |
1460 | core_setup_task_attr_emulation(dev); | |
1461 | /* | |
1462 | * Force PR and ALUA passthrough emulation with internal object use. | |
1463 | */ | |
1464 | force_pt = (hba->hba_flags & HBA_FLAGS_INTERNAL_USE); | |
1465 | /* | |
1466 | * Setup the Reservations infrastructure for struct se_device | |
1467 | */ | |
1468 | core_setup_reservations(dev, force_pt); | |
1469 | /* | |
1470 | * Setup the Asymmetric Logical Unit Assignment for struct se_device | |
1471 | */ | |
1472 | if (core_setup_alua(dev, force_pt) < 0) | |
1473 | goto out; | |
1474 | ||
1475 | /* | |
1476 | * Startup the struct se_device processing thread | |
1477 | */ | |
1478 | dev->process_thread = kthread_run(transport_processing_thread, dev, | |
e3d6f909 | 1479 | "LIO_%s", dev->transport->name); |
c66ac9db | 1480 | if (IS_ERR(dev->process_thread)) { |
6708bb27 | 1481 | pr_err("Unable to create kthread: LIO_%s\n", |
e3d6f909 | 1482 | dev->transport->name); |
c66ac9db NB |
1483 | goto out; |
1484 | } | |
07bde79a NB |
1485 | /* |
1486 | * Setup work_queue for QUEUE_FULL | |
1487 | */ | |
1488 | INIT_WORK(&dev->qf_work_queue, target_qf_do_work); | |
c66ac9db NB |
1489 | /* |
1490 | * Preload the initial INQUIRY const values if we are doing | |
1491 | * anything virtual (IBLOCK, FILEIO, RAMDISK), but not for TCM/pSCSI | |
1492 | * passthrough because this is being provided by the backend LLD. | |
1493 | * This is required so that transport_get_inquiry() copies these | |
1494 | * originals once back into DEV_T10_WWN(dev) for the virtual device | |
1495 | * setup. | |
1496 | */ | |
e3d6f909 | 1497 | if (dev->transport->transport_type != TRANSPORT_PLUGIN_PHBA_PDEV) { |
f22c1196 | 1498 | if (!inquiry_prod || !inquiry_rev) { |
6708bb27 | 1499 | pr_err("All non TCM/pSCSI plugins require" |
c66ac9db NB |
1500 | " INQUIRY consts\n"); |
1501 | goto out; | |
1502 | } | |
1503 | ||
e3d6f909 AG |
1504 | strncpy(&dev->se_sub_dev->t10_wwn.vendor[0], "LIO-ORG", 8); |
1505 | strncpy(&dev->se_sub_dev->t10_wwn.model[0], inquiry_prod, 16); | |
1506 | strncpy(&dev->se_sub_dev->t10_wwn.revision[0], inquiry_rev, 4); | |
c66ac9db NB |
1507 | } |
1508 | scsi_dump_inquiry(dev); | |
1509 | ||
12a18bdc | 1510 | return dev; |
c66ac9db | 1511 | out: |
c66ac9db NB |
1512 | kthread_stop(dev->process_thread); |
1513 | ||
1514 | spin_lock(&hba->device_lock); | |
1515 | list_del(&dev->dev_list); | |
1516 | hba->dev_count--; | |
1517 | spin_unlock(&hba->device_lock); | |
1518 | ||
1519 | se_release_vpd_for_dev(dev); | |
1520 | ||
c66ac9db NB |
1521 | kfree(dev); |
1522 | ||
1523 | return NULL; | |
1524 | } | |
1525 | EXPORT_SYMBOL(transport_add_device_to_core_hba); | |
1526 | ||
1527 | /* transport_generic_prepare_cdb(): | |
1528 | * | |
1529 | * Since the Initiator sees iSCSI devices as LUNs, the SCSI CDB will | |
1530 | * contain the iSCSI LUN in bits 7-5 of byte 1 as per SAM-2. | |
1531 | * The point of this is since we are mapping iSCSI LUNs to | |
1532 | * SCSI Target IDs having a non-zero LUN in the CDB will throw the | |
1533 | * devices and HBAs for a loop. | |
1534 | */ | |
1535 | static inline void transport_generic_prepare_cdb( | |
1536 | unsigned char *cdb) | |
1537 | { | |
1538 | switch (cdb[0]) { | |
1539 | case READ_10: /* SBC - RDProtect */ | |
1540 | case READ_12: /* SBC - RDProtect */ | |
1541 | case READ_16: /* SBC - RDProtect */ | |
1542 | case SEND_DIAGNOSTIC: /* SPC - SELF-TEST Code */ | |
1543 | case VERIFY: /* SBC - VRProtect */ | |
1544 | case VERIFY_16: /* SBC - VRProtect */ | |
1545 | case WRITE_VERIFY: /* SBC - VRProtect */ | |
1546 | case WRITE_VERIFY_12: /* SBC - VRProtect */ | |
1547 | break; | |
1548 | default: | |
1549 | cdb[1] &= 0x1f; /* clear logical unit number */ | |
1550 | break; | |
1551 | } | |
1552 | } | |
1553 | ||
1554 | static struct se_task * | |
1555 | transport_generic_get_task(struct se_cmd *cmd, | |
1556 | enum dma_data_direction data_direction) | |
1557 | { | |
1558 | struct se_task *task; | |
5951146d | 1559 | struct se_device *dev = cmd->se_dev; |
c66ac9db | 1560 | |
6708bb27 | 1561 | task = dev->transport->alloc_task(cmd->t_task_cdb); |
c66ac9db | 1562 | if (!task) { |
6708bb27 | 1563 | pr_err("Unable to allocate struct se_task\n"); |
c66ac9db NB |
1564 | return NULL; |
1565 | } | |
1566 | ||
1567 | INIT_LIST_HEAD(&task->t_list); | |
1568 | INIT_LIST_HEAD(&task->t_execute_list); | |
1569 | INIT_LIST_HEAD(&task->t_state_list); | |
1570 | init_completion(&task->task_stop_comp); | |
c66ac9db NB |
1571 | task->task_se_cmd = cmd; |
1572 | task->se_dev = dev; | |
1573 | task->task_data_direction = data_direction; | |
1574 | ||
c66ac9db NB |
1575 | return task; |
1576 | } | |
1577 | ||
1578 | static int transport_generic_cmd_sequencer(struct se_cmd *, unsigned char *); | |
1579 | ||
c66ac9db NB |
1580 | /* |
1581 | * Used by fabric modules containing a local struct se_cmd within their | |
1582 | * fabric dependent per I/O descriptor. | |
1583 | */ | |
1584 | void transport_init_se_cmd( | |
1585 | struct se_cmd *cmd, | |
1586 | struct target_core_fabric_ops *tfo, | |
1587 | struct se_session *se_sess, | |
1588 | u32 data_length, | |
1589 | int data_direction, | |
1590 | int task_attr, | |
1591 | unsigned char *sense_buffer) | |
1592 | { | |
5951146d AG |
1593 | INIT_LIST_HEAD(&cmd->se_lun_node); |
1594 | INIT_LIST_HEAD(&cmd->se_delayed_node); | |
1595 | INIT_LIST_HEAD(&cmd->se_ordered_node); | |
07bde79a | 1596 | INIT_LIST_HEAD(&cmd->se_qf_node); |
79a7fef2 | 1597 | INIT_LIST_HEAD(&cmd->se_queue_node); |
c66ac9db | 1598 | |
a1d8b49a AG |
1599 | INIT_LIST_HEAD(&cmd->t_task_list); |
1600 | init_completion(&cmd->transport_lun_fe_stop_comp); | |
1601 | init_completion(&cmd->transport_lun_stop_comp); | |
1602 | init_completion(&cmd->t_transport_stop_comp); | |
1603 | spin_lock_init(&cmd->t_state_lock); | |
1604 | atomic_set(&cmd->transport_dev_active, 1); | |
c66ac9db NB |
1605 | |
1606 | cmd->se_tfo = tfo; | |
1607 | cmd->se_sess = se_sess; | |
1608 | cmd->data_length = data_length; | |
1609 | cmd->data_direction = data_direction; | |
1610 | cmd->sam_task_attr = task_attr; | |
1611 | cmd->sense_buffer = sense_buffer; | |
1612 | } | |
1613 | EXPORT_SYMBOL(transport_init_se_cmd); | |
1614 | ||
1615 | static int transport_check_alloc_task_attr(struct se_cmd *cmd) | |
1616 | { | |
1617 | /* | |
1618 | * Check if SAM Task Attribute emulation is enabled for this | |
1619 | * struct se_device storage object | |
1620 | */ | |
5951146d | 1621 | if (cmd->se_dev->dev_task_attr_type != SAM_TASK_ATTR_EMULATED) |
c66ac9db NB |
1622 | return 0; |
1623 | ||
e66ecd50 | 1624 | if (cmd->sam_task_attr == MSG_ACA_TAG) { |
6708bb27 | 1625 | pr_debug("SAM Task Attribute ACA" |
c66ac9db | 1626 | " emulation is not supported\n"); |
e3d6f909 | 1627 | return -EINVAL; |
c66ac9db NB |
1628 | } |
1629 | /* | |
1630 | * Used to determine when ORDERED commands should go from | |
1631 | * Dormant to Active status. | |
1632 | */ | |
5951146d | 1633 | cmd->se_ordered_id = atomic_inc_return(&cmd->se_dev->dev_ordered_id); |
c66ac9db | 1634 | smp_mb__after_atomic_inc(); |
6708bb27 | 1635 | pr_debug("Allocated se_ordered_id: %u for Task Attr: 0x%02x on %s\n", |
c66ac9db | 1636 | cmd->se_ordered_id, cmd->sam_task_attr, |
6708bb27 | 1637 | cmd->se_dev->transport->name); |
c66ac9db NB |
1638 | return 0; |
1639 | } | |
1640 | ||
39c05f32 | 1641 | static void transport_generic_wait_for_tasks(struct se_cmd *, int); |
c66ac9db NB |
1642 | |
1643 | /* transport_generic_allocate_tasks(): | |
1644 | * | |
1645 | * Called from fabric RX Thread. | |
1646 | */ | |
1647 | int transport_generic_allocate_tasks( | |
1648 | struct se_cmd *cmd, | |
1649 | unsigned char *cdb) | |
1650 | { | |
1651 | int ret; | |
1652 | ||
1653 | transport_generic_prepare_cdb(cdb); | |
1654 | ||
1655 | /* | |
1656 | * This is needed for early exceptions. | |
1657 | */ | |
1658 | cmd->transport_wait_for_tasks = &transport_generic_wait_for_tasks; | |
1659 | ||
c66ac9db NB |
1660 | /* |
1661 | * Ensure that the received CDB is less than the max (252 + 8) bytes | |
1662 | * for VARIABLE_LENGTH_CMD | |
1663 | */ | |
1664 | if (scsi_command_size(cdb) > SCSI_MAX_VARLEN_CDB_SIZE) { | |
6708bb27 | 1665 | pr_err("Received SCSI CDB with command_size: %d that" |
c66ac9db NB |
1666 | " exceeds SCSI_MAX_VARLEN_CDB_SIZE: %d\n", |
1667 | scsi_command_size(cdb), SCSI_MAX_VARLEN_CDB_SIZE); | |
e3d6f909 | 1668 | return -EINVAL; |
c66ac9db NB |
1669 | } |
1670 | /* | |
1671 | * If the received CDB is larger than TCM_MAX_COMMAND_SIZE, | |
1672 | * allocate the additional extended CDB buffer now.. Otherwise | |
1673 | * setup the pointer from __t_task_cdb to t_task_cdb. | |
1674 | */ | |
a1d8b49a AG |
1675 | if (scsi_command_size(cdb) > sizeof(cmd->__t_task_cdb)) { |
1676 | cmd->t_task_cdb = kzalloc(scsi_command_size(cdb), | |
c66ac9db | 1677 | GFP_KERNEL); |
6708bb27 AG |
1678 | if (!cmd->t_task_cdb) { |
1679 | pr_err("Unable to allocate cmd->t_task_cdb" | |
a1d8b49a | 1680 | " %u > sizeof(cmd->__t_task_cdb): %lu ops\n", |
c66ac9db | 1681 | scsi_command_size(cdb), |
a1d8b49a | 1682 | (unsigned long)sizeof(cmd->__t_task_cdb)); |
e3d6f909 | 1683 | return -ENOMEM; |
c66ac9db NB |
1684 | } |
1685 | } else | |
a1d8b49a | 1686 | cmd->t_task_cdb = &cmd->__t_task_cdb[0]; |
c66ac9db | 1687 | /* |
a1d8b49a | 1688 | * Copy the original CDB into cmd-> |
c66ac9db | 1689 | */ |
a1d8b49a | 1690 | memcpy(cmd->t_task_cdb, cdb, scsi_command_size(cdb)); |
c66ac9db NB |
1691 | /* |
1692 | * Setup the received CDB based on SCSI defined opcodes and | |
1693 | * perform unit attention, persistent reservations and ALUA | |
a1d8b49a | 1694 | * checks for virtual device backends. The cmd->t_task_cdb |
c66ac9db NB |
1695 | * pointer is expected to be setup before we reach this point. |
1696 | */ | |
1697 | ret = transport_generic_cmd_sequencer(cmd, cdb); | |
1698 | if (ret < 0) | |
1699 | return ret; | |
1700 | /* | |
1701 | * Check for SAM Task Attribute Emulation | |
1702 | */ | |
1703 | if (transport_check_alloc_task_attr(cmd) < 0) { | |
1704 | cmd->se_cmd_flags |= SCF_SCSI_CDB_EXCEPTION; | |
1705 | cmd->scsi_sense_reason = TCM_INVALID_CDB_FIELD; | |
5951146d | 1706 | return -EINVAL; |
c66ac9db NB |
1707 | } |
1708 | spin_lock(&cmd->se_lun->lun_sep_lock); | |
1709 | if (cmd->se_lun->lun_sep) | |
1710 | cmd->se_lun->lun_sep->sep_stats.cmd_pdus++; | |
1711 | spin_unlock(&cmd->se_lun->lun_sep_lock); | |
1712 | return 0; | |
1713 | } | |
1714 | EXPORT_SYMBOL(transport_generic_allocate_tasks); | |
1715 | ||
dd8ae59d NB |
1716 | static void transport_generic_request_failure(struct se_cmd *, |
1717 | struct se_device *, int, int); | |
695434e1 NB |
1718 | /* |
1719 | * Used by fabric module frontends to queue tasks directly. | |
1720 | * Many only be used from process context only | |
1721 | */ | |
1722 | int transport_handle_cdb_direct( | |
1723 | struct se_cmd *cmd) | |
1724 | { | |
dd8ae59d NB |
1725 | int ret; |
1726 | ||
695434e1 NB |
1727 | if (!cmd->se_lun) { |
1728 | dump_stack(); | |
6708bb27 | 1729 | pr_err("cmd->se_lun is NULL\n"); |
695434e1 NB |
1730 | return -EINVAL; |
1731 | } | |
1732 | if (in_interrupt()) { | |
1733 | dump_stack(); | |
6708bb27 | 1734 | pr_err("transport_generic_handle_cdb cannot be called" |
695434e1 NB |
1735 | " from interrupt context\n"); |
1736 | return -EINVAL; | |
1737 | } | |
dd8ae59d NB |
1738 | /* |
1739 | * Set TRANSPORT_NEW_CMD state and cmd->t_transport_active=1 following | |
1740 | * transport_generic_handle_cdb*() -> transport_add_cmd_to_queue() | |
1741 | * in existing usage to ensure that outstanding descriptors are handled | |
1742 | * correctly during shutdown via transport_generic_wait_for_tasks() | |
1743 | * | |
1744 | * Also, we don't take cmd->t_state_lock here as we only expect | |
1745 | * this to be called for initial descriptor submission. | |
1746 | */ | |
1747 | cmd->t_state = TRANSPORT_NEW_CMD; | |
1748 | atomic_set(&cmd->t_transport_active, 1); | |
1749 | /* | |
1750 | * transport_generic_new_cmd() is already handling QUEUE_FULL, | |
1751 | * so follow TRANSPORT_NEW_CMD processing thread context usage | |
1752 | * and call transport_generic_request_failure() if necessary.. | |
1753 | */ | |
1754 | ret = transport_generic_new_cmd(cmd); | |
1755 | if (ret == -EAGAIN) | |
1756 | return 0; | |
1757 | else if (ret < 0) { | |
1758 | cmd->transport_error_status = ret; | |
1759 | transport_generic_request_failure(cmd, NULL, 0, | |
1760 | (cmd->data_direction != DMA_TO_DEVICE)); | |
1761 | } | |
1762 | return 0; | |
695434e1 NB |
1763 | } |
1764 | EXPORT_SYMBOL(transport_handle_cdb_direct); | |
1765 | ||
c66ac9db NB |
1766 | /* |
1767 | * Used by fabric module frontends defining a TFO->new_cmd_map() caller | |
1768 | * to queue up a newly setup se_cmd w/ TRANSPORT_NEW_CMD_MAP in order to | |
1769 | * complete setup in TCM process context w/ TFO->new_cmd_map(). | |
1770 | */ | |
1771 | int transport_generic_handle_cdb_map( | |
1772 | struct se_cmd *cmd) | |
1773 | { | |
e3d6f909 | 1774 | if (!cmd->se_lun) { |
c66ac9db | 1775 | dump_stack(); |
6708bb27 | 1776 | pr_err("cmd->se_lun is NULL\n"); |
e3d6f909 | 1777 | return -EINVAL; |
c66ac9db NB |
1778 | } |
1779 | ||
1780 | transport_add_cmd_to_queue(cmd, TRANSPORT_NEW_CMD_MAP); | |
1781 | return 0; | |
1782 | } | |
1783 | EXPORT_SYMBOL(transport_generic_handle_cdb_map); | |
1784 | ||
1785 | /* transport_generic_handle_data(): | |
1786 | * | |
1787 | * | |
1788 | */ | |
1789 | int transport_generic_handle_data( | |
1790 | struct se_cmd *cmd) | |
1791 | { | |
1792 | /* | |
1793 | * For the software fabric case, then we assume the nexus is being | |
1794 | * failed/shutdown when signals are pending from the kthread context | |
1795 | * caller, so we return a failure. For the HW target mode case running | |
1796 | * in interrupt code, the signal_pending() check is skipped. | |
1797 | */ | |
1798 | if (!in_interrupt() && signal_pending(current)) | |
e3d6f909 | 1799 | return -EPERM; |
c66ac9db NB |
1800 | /* |
1801 | * If the received CDB has aleady been ABORTED by the generic | |
1802 | * target engine, we now call transport_check_aborted_status() | |
1803 | * to queue any delated TASK_ABORTED status for the received CDB to the | |
25985edc | 1804 | * fabric module as we are expecting no further incoming DATA OUT |
c66ac9db NB |
1805 | * sequences at this point. |
1806 | */ | |
1807 | if (transport_check_aborted_status(cmd, 1) != 0) | |
1808 | return 0; | |
1809 | ||
1810 | transport_add_cmd_to_queue(cmd, TRANSPORT_PROCESS_WRITE); | |
1811 | return 0; | |
1812 | } | |
1813 | EXPORT_SYMBOL(transport_generic_handle_data); | |
1814 | ||
1815 | /* transport_generic_handle_tmr(): | |
1816 | * | |
1817 | * | |
1818 | */ | |
1819 | int transport_generic_handle_tmr( | |
1820 | struct se_cmd *cmd) | |
1821 | { | |
1822 | /* | |
1823 | * This is needed for early exceptions. | |
1824 | */ | |
1825 | cmd->transport_wait_for_tasks = &transport_generic_wait_for_tasks; | |
c66ac9db NB |
1826 | |
1827 | transport_add_cmd_to_queue(cmd, TRANSPORT_PROCESS_TMR); | |
1828 | return 0; | |
1829 | } | |
1830 | EXPORT_SYMBOL(transport_generic_handle_tmr); | |
1831 | ||
f4366772 NB |
1832 | void transport_generic_free_cmd_intr( |
1833 | struct se_cmd *cmd) | |
1834 | { | |
1835 | transport_add_cmd_to_queue(cmd, TRANSPORT_FREE_CMD_INTR); | |
1836 | } | |
1837 | EXPORT_SYMBOL(transport_generic_free_cmd_intr); | |
1838 | ||
c66ac9db NB |
1839 | static int transport_stop_tasks_for_cmd(struct se_cmd *cmd) |
1840 | { | |
1841 | struct se_task *task, *task_tmp; | |
1842 | unsigned long flags; | |
1843 | int ret = 0; | |
1844 | ||
6708bb27 | 1845 | pr_debug("ITT[0x%08x] - Stopping tasks\n", |
e3d6f909 | 1846 | cmd->se_tfo->get_task_tag(cmd)); |
c66ac9db NB |
1847 | |
1848 | /* | |
1849 | * No tasks remain in the execution queue | |
1850 | */ | |
a1d8b49a | 1851 | spin_lock_irqsave(&cmd->t_state_lock, flags); |
c66ac9db | 1852 | list_for_each_entry_safe(task, task_tmp, |
a1d8b49a | 1853 | &cmd->t_task_list, t_list) { |
6708bb27 | 1854 | pr_debug("task_no[%d] - Processing task %p\n", |
c66ac9db NB |
1855 | task->task_no, task); |
1856 | /* | |
1857 | * If the struct se_task has not been sent and is not active, | |
1858 | * remove the struct se_task from the execution queue. | |
1859 | */ | |
1860 | if (!atomic_read(&task->task_sent) && | |
1861 | !atomic_read(&task->task_active)) { | |
a1d8b49a | 1862 | spin_unlock_irqrestore(&cmd->t_state_lock, |
c66ac9db NB |
1863 | flags); |
1864 | transport_remove_task_from_execute_queue(task, | |
1865 | task->se_dev); | |
1866 | ||
6708bb27 | 1867 | pr_debug("task_no[%d] - Removed from execute queue\n", |
c66ac9db | 1868 | task->task_no); |
a1d8b49a | 1869 | spin_lock_irqsave(&cmd->t_state_lock, flags); |
c66ac9db NB |
1870 | continue; |
1871 | } | |
1872 | ||
1873 | /* | |
1874 | * If the struct se_task is active, sleep until it is returned | |
1875 | * from the plugin. | |
1876 | */ | |
1877 | if (atomic_read(&task->task_active)) { | |
1878 | atomic_set(&task->task_stop, 1); | |
a1d8b49a | 1879 | spin_unlock_irqrestore(&cmd->t_state_lock, |
c66ac9db NB |
1880 | flags); |
1881 | ||
6708bb27 | 1882 | pr_debug("task_no[%d] - Waiting to complete\n", |
c66ac9db NB |
1883 | task->task_no); |
1884 | wait_for_completion(&task->task_stop_comp); | |
6708bb27 | 1885 | pr_debug("task_no[%d] - Stopped successfully\n", |
c66ac9db NB |
1886 | task->task_no); |
1887 | ||
a1d8b49a AG |
1888 | spin_lock_irqsave(&cmd->t_state_lock, flags); |
1889 | atomic_dec(&cmd->t_task_cdbs_left); | |
c66ac9db NB |
1890 | |
1891 | atomic_set(&task->task_active, 0); | |
1892 | atomic_set(&task->task_stop, 0); | |
1893 | } else { | |
6708bb27 | 1894 | pr_debug("task_no[%d] - Did nothing\n", task->task_no); |
c66ac9db NB |
1895 | ret++; |
1896 | } | |
1897 | ||
1898 | __transport_stop_task_timer(task, &flags); | |
1899 | } | |
a1d8b49a | 1900 | spin_unlock_irqrestore(&cmd->t_state_lock, flags); |
c66ac9db NB |
1901 | |
1902 | return ret; | |
1903 | } | |
1904 | ||
c66ac9db NB |
1905 | /* |
1906 | * Handle SAM-esque emulation for generic transport request failures. | |
1907 | */ | |
1908 | static void transport_generic_request_failure( | |
1909 | struct se_cmd *cmd, | |
1910 | struct se_device *dev, | |
1911 | int complete, | |
1912 | int sc) | |
1913 | { | |
07bde79a NB |
1914 | int ret = 0; |
1915 | ||
6708bb27 | 1916 | pr_debug("-----[ Storage Engine Exception for cmd: %p ITT: 0x%08x" |
e3d6f909 | 1917 | " CDB: 0x%02x\n", cmd, cmd->se_tfo->get_task_tag(cmd), |
a1d8b49a | 1918 | cmd->t_task_cdb[0]); |
6708bb27 | 1919 | pr_debug("-----[ i_state: %d t_state/def_t_state:" |
c66ac9db | 1920 | " %d/%d transport_error_status: %d\n", |
e3d6f909 | 1921 | cmd->se_tfo->get_cmd_state(cmd), |
c66ac9db NB |
1922 | cmd->t_state, cmd->deferred_t_state, |
1923 | cmd->transport_error_status); | |
6708bb27 | 1924 | pr_debug("-----[ t_tasks: %d t_task_cdbs_left: %d" |
c66ac9db NB |
1925 | " t_task_cdbs_sent: %d t_task_cdbs_ex_left: %d --" |
1926 | " t_transport_active: %d t_transport_stop: %d" | |
6708bb27 | 1927 | " t_transport_sent: %d\n", cmd->t_task_list_num, |
a1d8b49a AG |
1928 | atomic_read(&cmd->t_task_cdbs_left), |
1929 | atomic_read(&cmd->t_task_cdbs_sent), | |
1930 | atomic_read(&cmd->t_task_cdbs_ex_left), | |
1931 | atomic_read(&cmd->t_transport_active), | |
1932 | atomic_read(&cmd->t_transport_stop), | |
1933 | atomic_read(&cmd->t_transport_sent)); | |
c66ac9db NB |
1934 | |
1935 | transport_stop_all_task_timers(cmd); | |
1936 | ||
1937 | if (dev) | |
e3d6f909 | 1938 | atomic_inc(&dev->depth_left); |
c66ac9db NB |
1939 | /* |
1940 | * For SAM Task Attribute emulation for failed struct se_cmd | |
1941 | */ | |
1942 | if (cmd->se_dev->dev_task_attr_type == SAM_TASK_ATTR_EMULATED) | |
1943 | transport_complete_task_attr(cmd); | |
1944 | ||
1945 | if (complete) { | |
1946 | transport_direct_request_timeout(cmd); | |
1947 | cmd->transport_error_status = PYX_TRANSPORT_LU_COMM_FAILURE; | |
1948 | } | |
1949 | ||
1950 | switch (cmd->transport_error_status) { | |
1951 | case PYX_TRANSPORT_UNKNOWN_SAM_OPCODE: | |
1952 | cmd->scsi_sense_reason = TCM_UNSUPPORTED_SCSI_OPCODE; | |
1953 | break; | |
1954 | case PYX_TRANSPORT_REQ_TOO_MANY_SECTORS: | |
1955 | cmd->scsi_sense_reason = TCM_SECTOR_COUNT_TOO_MANY; | |
1956 | break; | |
1957 | case PYX_TRANSPORT_INVALID_CDB_FIELD: | |
1958 | cmd->scsi_sense_reason = TCM_INVALID_CDB_FIELD; | |
1959 | break; | |
1960 | case PYX_TRANSPORT_INVALID_PARAMETER_LIST: | |
1961 | cmd->scsi_sense_reason = TCM_INVALID_PARAMETER_LIST; | |
1962 | break; | |
1963 | case PYX_TRANSPORT_OUT_OF_MEMORY_RESOURCES: | |
1964 | if (!sc) | |
1965 | transport_new_cmd_failure(cmd); | |
1966 | /* | |
1967 | * Currently for PYX_TRANSPORT_OUT_OF_MEMORY_RESOURCES, | |
1968 | * we force this session to fall back to session | |
1969 | * recovery. | |
1970 | */ | |
e3d6f909 AG |
1971 | cmd->se_tfo->fall_back_to_erl0(cmd->se_sess); |
1972 | cmd->se_tfo->stop_session(cmd->se_sess, 0, 0); | |
c66ac9db NB |
1973 | |
1974 | goto check_stop; | |
1975 | case PYX_TRANSPORT_LU_COMM_FAILURE: | |
1976 | case PYX_TRANSPORT_ILLEGAL_REQUEST: | |
1977 | cmd->scsi_sense_reason = TCM_LOGICAL_UNIT_COMMUNICATION_FAILURE; | |
1978 | break; | |
1979 | case PYX_TRANSPORT_UNKNOWN_MODE_PAGE: | |
1980 | cmd->scsi_sense_reason = TCM_UNKNOWN_MODE_PAGE; | |
1981 | break; | |
1982 | case PYX_TRANSPORT_WRITE_PROTECTED: | |
1983 | cmd->scsi_sense_reason = TCM_WRITE_PROTECTED; | |
1984 | break; | |
1985 | case PYX_TRANSPORT_RESERVATION_CONFLICT: | |
1986 | /* | |
1987 | * No SENSE Data payload for this case, set SCSI Status | |
1988 | * and queue the response to $FABRIC_MOD. | |
1989 | * | |
1990 | * Uses linux/include/scsi/scsi.h SAM status codes defs | |
1991 | */ | |
1992 | cmd->scsi_status = SAM_STAT_RESERVATION_CONFLICT; | |
1993 | /* | |
1994 | * For UA Interlock Code 11b, a RESERVATION CONFLICT will | |
1995 | * establish a UNIT ATTENTION with PREVIOUS RESERVATION | |
1996 | * CONFLICT STATUS. | |
1997 | * | |
1998 | * See spc4r17, section 7.4.6 Control Mode Page, Table 349 | |
1999 | */ | |
e3d6f909 AG |
2000 | if (cmd->se_sess && |
2001 | cmd->se_dev->se_sub_dev->se_dev_attrib.emulate_ua_intlck_ctrl == 2) | |
2002 | core_scsi3_ua_allocate(cmd->se_sess->se_node_acl, | |
c66ac9db NB |
2003 | cmd->orig_fe_lun, 0x2C, |
2004 | ASCQ_2CH_PREVIOUS_RESERVATION_CONFLICT_STATUS); | |
2005 | ||
07bde79a NB |
2006 | ret = cmd->se_tfo->queue_status(cmd); |
2007 | if (ret == -EAGAIN) | |
2008 | goto queue_full; | |
c66ac9db NB |
2009 | goto check_stop; |
2010 | case PYX_TRANSPORT_USE_SENSE_REASON: | |
2011 | /* | |
2012 | * struct se_cmd->scsi_sense_reason already set | |
2013 | */ | |
2014 | break; | |
2015 | default: | |
6708bb27 | 2016 | pr_err("Unknown transport error for CDB 0x%02x: %d\n", |
a1d8b49a | 2017 | cmd->t_task_cdb[0], |
c66ac9db NB |
2018 | cmd->transport_error_status); |
2019 | cmd->scsi_sense_reason = TCM_UNSUPPORTED_SCSI_OPCODE; | |
2020 | break; | |
2021 | } | |
16ab8e60 NB |
2022 | /* |
2023 | * If a fabric does not define a cmd->se_tfo->new_cmd_map caller, | |
2024 | * make the call to transport_send_check_condition_and_sense() | |
2025 | * directly. Otherwise expect the fabric to make the call to | |
2026 | * transport_send_check_condition_and_sense() after handling | |
2027 | * possible unsoliticied write data payloads. | |
2028 | */ | |
2029 | if (!sc && !cmd->se_tfo->new_cmd_map) | |
c66ac9db | 2030 | transport_new_cmd_failure(cmd); |
07bde79a NB |
2031 | else { |
2032 | ret = transport_send_check_condition_and_sense(cmd, | |
2033 | cmd->scsi_sense_reason, 0); | |
2034 | if (ret == -EAGAIN) | |
2035 | goto queue_full; | |
2036 | } | |
2037 | ||
c66ac9db NB |
2038 | check_stop: |
2039 | transport_lun_remove_cmd(cmd); | |
6708bb27 | 2040 | if (!transport_cmd_check_stop_to_fabric(cmd)) |
c66ac9db | 2041 | ; |
07bde79a NB |
2042 | return; |
2043 | ||
2044 | queue_full: | |
2045 | cmd->t_state = TRANSPORT_COMPLETE_OK; | |
2046 | transport_handle_queue_full(cmd, cmd->se_dev, transport_complete_qf); | |
c66ac9db NB |
2047 | } |
2048 | ||
2049 | static void transport_direct_request_timeout(struct se_cmd *cmd) | |
2050 | { | |
2051 | unsigned long flags; | |
2052 | ||
a1d8b49a | 2053 | spin_lock_irqsave(&cmd->t_state_lock, flags); |
6708bb27 | 2054 | if (!atomic_read(&cmd->t_transport_timeout)) { |
a1d8b49a | 2055 | spin_unlock_irqrestore(&cmd->t_state_lock, flags); |
c66ac9db NB |
2056 | return; |
2057 | } | |
a1d8b49a AG |
2058 | if (atomic_read(&cmd->t_task_cdbs_timeout_left)) { |
2059 | spin_unlock_irqrestore(&cmd->t_state_lock, flags); | |
c66ac9db NB |
2060 | return; |
2061 | } | |
2062 | ||
a1d8b49a AG |
2063 | atomic_sub(atomic_read(&cmd->t_transport_timeout), |
2064 | &cmd->t_se_count); | |
2065 | spin_unlock_irqrestore(&cmd->t_state_lock, flags); | |
c66ac9db NB |
2066 | } |
2067 | ||
2068 | static void transport_generic_request_timeout(struct se_cmd *cmd) | |
2069 | { | |
2070 | unsigned long flags; | |
2071 | ||
2072 | /* | |
e6a2573f | 2073 | * Reset cmd->t_se_count to allow transport_put_cmd() |
c66ac9db NB |
2074 | * to allow last call to free memory resources. |
2075 | */ | |
a1d8b49a AG |
2076 | spin_lock_irqsave(&cmd->t_state_lock, flags); |
2077 | if (atomic_read(&cmd->t_transport_timeout) > 1) { | |
2078 | int tmp = (atomic_read(&cmd->t_transport_timeout) - 1); | |
c66ac9db | 2079 | |
a1d8b49a | 2080 | atomic_sub(tmp, &cmd->t_se_count); |
c66ac9db | 2081 | } |
a1d8b49a | 2082 | spin_unlock_irqrestore(&cmd->t_state_lock, flags); |
c66ac9db | 2083 | |
e6a2573f | 2084 | transport_put_cmd(cmd); |
c66ac9db NB |
2085 | } |
2086 | ||
c66ac9db NB |
2087 | static inline u32 transport_lba_21(unsigned char *cdb) |
2088 | { | |
2089 | return ((cdb[1] & 0x1f) << 16) | (cdb[2] << 8) | cdb[3]; | |
2090 | } | |
2091 | ||
2092 | static inline u32 transport_lba_32(unsigned char *cdb) | |
2093 | { | |
2094 | return (cdb[2] << 24) | (cdb[3] << 16) | (cdb[4] << 8) | cdb[5]; | |
2095 | } | |
2096 | ||
2097 | static inline unsigned long long transport_lba_64(unsigned char *cdb) | |
2098 | { | |
2099 | unsigned int __v1, __v2; | |
2100 | ||
2101 | __v1 = (cdb[2] << 24) | (cdb[3] << 16) | (cdb[4] << 8) | cdb[5]; | |
2102 | __v2 = (cdb[6] << 24) | (cdb[7] << 16) | (cdb[8] << 8) | cdb[9]; | |
2103 | ||
2104 | return ((unsigned long long)__v2) | (unsigned long long)__v1 << 32; | |
2105 | } | |
2106 | ||
2107 | /* | |
2108 | * For VARIABLE_LENGTH_CDB w/ 32 byte extended CDBs | |
2109 | */ | |
2110 | static inline unsigned long long transport_lba_64_ext(unsigned char *cdb) | |
2111 | { | |
2112 | unsigned int __v1, __v2; | |
2113 | ||
2114 | __v1 = (cdb[12] << 24) | (cdb[13] << 16) | (cdb[14] << 8) | cdb[15]; | |
2115 | __v2 = (cdb[16] << 24) | (cdb[17] << 16) | (cdb[18] << 8) | cdb[19]; | |
2116 | ||
2117 | return ((unsigned long long)__v2) | (unsigned long long)__v1 << 32; | |
2118 | } | |
2119 | ||
2120 | static void transport_set_supported_SAM_opcode(struct se_cmd *se_cmd) | |
2121 | { | |
2122 | unsigned long flags; | |
2123 | ||
a1d8b49a | 2124 | spin_lock_irqsave(&se_cmd->t_state_lock, flags); |
c66ac9db | 2125 | se_cmd->se_cmd_flags |= SCF_SUPPORTED_SAM_OPCODE; |
a1d8b49a | 2126 | spin_unlock_irqrestore(&se_cmd->t_state_lock, flags); |
c66ac9db NB |
2127 | } |
2128 | ||
2129 | /* | |
2130 | * Called from interrupt context. | |
2131 | */ | |
2132 | static void transport_task_timeout_handler(unsigned long data) | |
2133 | { | |
2134 | struct se_task *task = (struct se_task *)data; | |
e3d6f909 | 2135 | struct se_cmd *cmd = task->task_se_cmd; |
c66ac9db NB |
2136 | unsigned long flags; |
2137 | ||
6708bb27 | 2138 | pr_debug("transport task timeout fired! task: %p cmd: %p\n", task, cmd); |
c66ac9db | 2139 | |
a1d8b49a | 2140 | spin_lock_irqsave(&cmd->t_state_lock, flags); |
c66ac9db | 2141 | if (task->task_flags & TF_STOP) { |
a1d8b49a | 2142 | spin_unlock_irqrestore(&cmd->t_state_lock, flags); |
c66ac9db NB |
2143 | return; |
2144 | } | |
2145 | task->task_flags &= ~TF_RUNNING; | |
2146 | ||
2147 | /* | |
2148 | * Determine if transport_complete_task() has already been called. | |
2149 | */ | |
6708bb27 AG |
2150 | if (!atomic_read(&task->task_active)) { |
2151 | pr_debug("transport task: %p cmd: %p timeout task_active" | |
c66ac9db | 2152 | " == 0\n", task, cmd); |
a1d8b49a | 2153 | spin_unlock_irqrestore(&cmd->t_state_lock, flags); |
c66ac9db NB |
2154 | return; |
2155 | } | |
2156 | ||
a1d8b49a AG |
2157 | atomic_inc(&cmd->t_se_count); |
2158 | atomic_inc(&cmd->t_transport_timeout); | |
2159 | cmd->t_tasks_failed = 1; | |
c66ac9db NB |
2160 | |
2161 | atomic_set(&task->task_timeout, 1); | |
2162 | task->task_error_status = PYX_TRANSPORT_TASK_TIMEOUT; | |
2163 | task->task_scsi_status = 1; | |
2164 | ||
2165 | if (atomic_read(&task->task_stop)) { | |
6708bb27 | 2166 | pr_debug("transport task: %p cmd: %p timeout task_stop" |
c66ac9db | 2167 | " == 1\n", task, cmd); |
a1d8b49a | 2168 | spin_unlock_irqrestore(&cmd->t_state_lock, flags); |
c66ac9db NB |
2169 | complete(&task->task_stop_comp); |
2170 | return; | |
2171 | } | |
2172 | ||
6708bb27 AG |
2173 | if (!atomic_dec_and_test(&cmd->t_task_cdbs_left)) { |
2174 | pr_debug("transport task: %p cmd: %p timeout non zero" | |
c66ac9db | 2175 | " t_task_cdbs_left\n", task, cmd); |
a1d8b49a | 2176 | spin_unlock_irqrestore(&cmd->t_state_lock, flags); |
c66ac9db NB |
2177 | return; |
2178 | } | |
6708bb27 | 2179 | pr_debug("transport task: %p cmd: %p timeout ZERO t_task_cdbs_left\n", |
c66ac9db NB |
2180 | task, cmd); |
2181 | ||
2182 | cmd->t_state = TRANSPORT_COMPLETE_FAILURE; | |
a1d8b49a | 2183 | spin_unlock_irqrestore(&cmd->t_state_lock, flags); |
c66ac9db NB |
2184 | |
2185 | transport_add_cmd_to_queue(cmd, TRANSPORT_COMPLETE_FAILURE); | |
2186 | } | |
2187 | ||
2188 | /* | |
a1d8b49a | 2189 | * Called with cmd->t_state_lock held. |
c66ac9db NB |
2190 | */ |
2191 | static void transport_start_task_timer(struct se_task *task) | |
2192 | { | |
2193 | struct se_device *dev = task->se_dev; | |
2194 | int timeout; | |
2195 | ||
2196 | if (task->task_flags & TF_RUNNING) | |
2197 | return; | |
2198 | /* | |
2199 | * If the task_timeout is disabled, exit now. | |
2200 | */ | |
e3d6f909 | 2201 | timeout = dev->se_sub_dev->se_dev_attrib.task_timeout; |
6708bb27 | 2202 | if (!timeout) |
c66ac9db NB |
2203 | return; |
2204 | ||
2205 | init_timer(&task->task_timer); | |
2206 | task->task_timer.expires = (get_jiffies_64() + timeout * HZ); | |
2207 | task->task_timer.data = (unsigned long) task; | |
2208 | task->task_timer.function = transport_task_timeout_handler; | |
2209 | ||
2210 | task->task_flags |= TF_RUNNING; | |
2211 | add_timer(&task->task_timer); | |
2212 | #if 0 | |
6708bb27 | 2213 | pr_debug("Starting task timer for cmd: %p task: %p seconds:" |
c66ac9db NB |
2214 | " %d\n", task->task_se_cmd, task, timeout); |
2215 | #endif | |
2216 | } | |
2217 | ||
2218 | /* | |
a1d8b49a | 2219 | * Called with spin_lock_irq(&cmd->t_state_lock) held. |
c66ac9db NB |
2220 | */ |
2221 | void __transport_stop_task_timer(struct se_task *task, unsigned long *flags) | |
2222 | { | |
e3d6f909 | 2223 | struct se_cmd *cmd = task->task_se_cmd; |
c66ac9db | 2224 | |
6708bb27 | 2225 | if (!task->task_flags & TF_RUNNING) |
c66ac9db NB |
2226 | return; |
2227 | ||
2228 | task->task_flags |= TF_STOP; | |
a1d8b49a | 2229 | spin_unlock_irqrestore(&cmd->t_state_lock, *flags); |
c66ac9db NB |
2230 | |
2231 | del_timer_sync(&task->task_timer); | |
2232 | ||
a1d8b49a | 2233 | spin_lock_irqsave(&cmd->t_state_lock, *flags); |
c66ac9db NB |
2234 | task->task_flags &= ~TF_RUNNING; |
2235 | task->task_flags &= ~TF_STOP; | |
2236 | } | |
2237 | ||
2238 | static void transport_stop_all_task_timers(struct se_cmd *cmd) | |
2239 | { | |
2240 | struct se_task *task = NULL, *task_tmp; | |
2241 | unsigned long flags; | |
2242 | ||
a1d8b49a | 2243 | spin_lock_irqsave(&cmd->t_state_lock, flags); |
c66ac9db | 2244 | list_for_each_entry_safe(task, task_tmp, |
a1d8b49a | 2245 | &cmd->t_task_list, t_list) |
c66ac9db | 2246 | __transport_stop_task_timer(task, &flags); |
a1d8b49a | 2247 | spin_unlock_irqrestore(&cmd->t_state_lock, flags); |
c66ac9db NB |
2248 | } |
2249 | ||
2250 | static inline int transport_tcq_window_closed(struct se_device *dev) | |
2251 | { | |
2252 | if (dev->dev_tcq_window_closed++ < | |
2253 | PYX_TRANSPORT_WINDOW_CLOSED_THRESHOLD) { | |
2254 | msleep(PYX_TRANSPORT_WINDOW_CLOSED_WAIT_SHORT); | |
2255 | } else | |
2256 | msleep(PYX_TRANSPORT_WINDOW_CLOSED_WAIT_LONG); | |
2257 | ||
e3d6f909 | 2258 | wake_up_interruptible(&dev->dev_queue_obj.thread_wq); |
c66ac9db NB |
2259 | return 0; |
2260 | } | |
2261 | ||
2262 | /* | |
2263 | * Called from Fabric Module context from transport_execute_tasks() | |
2264 | * | |
2265 | * The return of this function determins if the tasks from struct se_cmd | |
2266 | * get added to the execution queue in transport_execute_tasks(), | |
2267 | * or are added to the delayed or ordered lists here. | |
2268 | */ | |
2269 | static inline int transport_execute_task_attr(struct se_cmd *cmd) | |
2270 | { | |
5951146d | 2271 | if (cmd->se_dev->dev_task_attr_type != SAM_TASK_ATTR_EMULATED) |
c66ac9db NB |
2272 | return 1; |
2273 | /* | |
25985edc | 2274 | * Check for the existence of HEAD_OF_QUEUE, and if true return 1 |
c66ac9db NB |
2275 | * to allow the passed struct se_cmd list of tasks to the front of the list. |
2276 | */ | |
e66ecd50 | 2277 | if (cmd->sam_task_attr == MSG_HEAD_TAG) { |
5951146d | 2278 | atomic_inc(&cmd->se_dev->dev_hoq_count); |
c66ac9db | 2279 | smp_mb__after_atomic_inc(); |
6708bb27 | 2280 | pr_debug("Added HEAD_OF_QUEUE for CDB:" |
c66ac9db | 2281 | " 0x%02x, se_ordered_id: %u\n", |
6708bb27 | 2282 | cmd->t_task_cdb[0], |
c66ac9db NB |
2283 | cmd->se_ordered_id); |
2284 | return 1; | |
e66ecd50 | 2285 | } else if (cmd->sam_task_attr == MSG_ORDERED_TAG) { |
5951146d AG |
2286 | spin_lock(&cmd->se_dev->ordered_cmd_lock); |
2287 | list_add_tail(&cmd->se_ordered_node, | |
2288 | &cmd->se_dev->ordered_cmd_list); | |
2289 | spin_unlock(&cmd->se_dev->ordered_cmd_lock); | |
c66ac9db | 2290 | |
5951146d | 2291 | atomic_inc(&cmd->se_dev->dev_ordered_sync); |
c66ac9db NB |
2292 | smp_mb__after_atomic_inc(); |
2293 | ||
6708bb27 | 2294 | pr_debug("Added ORDERED for CDB: 0x%02x to ordered" |
c66ac9db | 2295 | " list, se_ordered_id: %u\n", |
a1d8b49a | 2296 | cmd->t_task_cdb[0], |
c66ac9db NB |
2297 | cmd->se_ordered_id); |
2298 | /* | |
2299 | * Add ORDERED command to tail of execution queue if | |
2300 | * no other older commands exist that need to be | |
2301 | * completed first. | |
2302 | */ | |
6708bb27 | 2303 | if (!atomic_read(&cmd->se_dev->simple_cmds)) |
c66ac9db NB |
2304 | return 1; |
2305 | } else { | |
2306 | /* | |
2307 | * For SIMPLE and UNTAGGED Task Attribute commands | |
2308 | */ | |
5951146d | 2309 | atomic_inc(&cmd->se_dev->simple_cmds); |
c66ac9db NB |
2310 | smp_mb__after_atomic_inc(); |
2311 | } | |
2312 | /* | |
2313 | * Otherwise if one or more outstanding ORDERED task attribute exist, | |
2314 | * add the dormant task(s) built for the passed struct se_cmd to the | |
2315 | * execution queue and become in Active state for this struct se_device. | |
2316 | */ | |
5951146d | 2317 | if (atomic_read(&cmd->se_dev->dev_ordered_sync) != 0) { |
c66ac9db NB |
2318 | /* |
2319 | * Otherwise, add cmd w/ tasks to delayed cmd queue that | |
25985edc | 2320 | * will be drained upon completion of HEAD_OF_QUEUE task. |
c66ac9db | 2321 | */ |
5951146d | 2322 | spin_lock(&cmd->se_dev->delayed_cmd_lock); |
c66ac9db | 2323 | cmd->se_cmd_flags |= SCF_DELAYED_CMD_FROM_SAM_ATTR; |
5951146d AG |
2324 | list_add_tail(&cmd->se_delayed_node, |
2325 | &cmd->se_dev->delayed_cmd_list); | |
2326 | spin_unlock(&cmd->se_dev->delayed_cmd_lock); | |
c66ac9db | 2327 | |
6708bb27 | 2328 | pr_debug("Added CDB: 0x%02x Task Attr: 0x%02x to" |
c66ac9db | 2329 | " delayed CMD list, se_ordered_id: %u\n", |
a1d8b49a | 2330 | cmd->t_task_cdb[0], cmd->sam_task_attr, |
c66ac9db NB |
2331 | cmd->se_ordered_id); |
2332 | /* | |
2333 | * Return zero to let transport_execute_tasks() know | |
2334 | * not to add the delayed tasks to the execution list. | |
2335 | */ | |
2336 | return 0; | |
2337 | } | |
2338 | /* | |
2339 | * Otherwise, no ORDERED task attributes exist.. | |
2340 | */ | |
2341 | return 1; | |
2342 | } | |
2343 | ||
2344 | /* | |
2345 | * Called from fabric module context in transport_generic_new_cmd() and | |
2346 | * transport_generic_process_write() | |
2347 | */ | |
2348 | static int transport_execute_tasks(struct se_cmd *cmd) | |
2349 | { | |
2350 | int add_tasks; | |
2351 | ||
db1620a2 CH |
2352 | if (se_dev_check_online(cmd->se_orig_obj_ptr) != 0) { |
2353 | cmd->transport_error_status = PYX_TRANSPORT_LU_COMM_FAILURE; | |
2354 | transport_generic_request_failure(cmd, NULL, 0, 1); | |
2355 | return 0; | |
c66ac9db | 2356 | } |
db1620a2 | 2357 | |
c66ac9db NB |
2358 | /* |
2359 | * Call transport_cmd_check_stop() to see if a fabric exception | |
25985edc | 2360 | * has occurred that prevents execution. |
c66ac9db | 2361 | */ |
6708bb27 | 2362 | if (!transport_cmd_check_stop(cmd, 0, TRANSPORT_PROCESSING)) { |
c66ac9db NB |
2363 | /* |
2364 | * Check for SAM Task Attribute emulation and HEAD_OF_QUEUE | |
2365 | * attribute for the tasks of the received struct se_cmd CDB | |
2366 | */ | |
2367 | add_tasks = transport_execute_task_attr(cmd); | |
e3d6f909 | 2368 | if (!add_tasks) |
c66ac9db NB |
2369 | goto execute_tasks; |
2370 | /* | |
2371 | * This calls transport_add_tasks_from_cmd() to handle | |
2372 | * HEAD_OF_QUEUE ordering for SAM Task Attribute emulation | |
2373 | * (if enabled) in __transport_add_task_to_execute_queue() and | |
2374 | * transport_add_task_check_sam_attr(). | |
2375 | */ | |
2376 | transport_add_tasks_from_cmd(cmd); | |
2377 | } | |
2378 | /* | |
2379 | * Kick the execution queue for the cmd associated struct se_device | |
2380 | * storage object. | |
2381 | */ | |
2382 | execute_tasks: | |
5951146d | 2383 | __transport_execute_tasks(cmd->se_dev); |
c66ac9db NB |
2384 | return 0; |
2385 | } | |
2386 | ||
2387 | /* | |
2388 | * Called to check struct se_device tcq depth window, and once open pull struct se_task | |
2389 | * from struct se_device->execute_task_list and | |
2390 | * | |
2391 | * Called from transport_processing_thread() | |
2392 | */ | |
2393 | static int __transport_execute_tasks(struct se_device *dev) | |
2394 | { | |
2395 | int error; | |
2396 | struct se_cmd *cmd = NULL; | |
e3d6f909 | 2397 | struct se_task *task = NULL; |
c66ac9db NB |
2398 | unsigned long flags; |
2399 | ||
2400 | /* | |
2401 | * Check if there is enough room in the device and HBA queue to send | |
a1d8b49a | 2402 | * struct se_tasks to the selected transport. |
c66ac9db NB |
2403 | */ |
2404 | check_depth: | |
e3d6f909 | 2405 | if (!atomic_read(&dev->depth_left)) |
c66ac9db | 2406 | return transport_tcq_window_closed(dev); |
c66ac9db | 2407 | |
e3d6f909 | 2408 | dev->dev_tcq_window_closed = 0; |
c66ac9db | 2409 | |
e3d6f909 AG |
2410 | spin_lock_irq(&dev->execute_task_lock); |
2411 | if (list_empty(&dev->execute_task_list)) { | |
2412 | spin_unlock_irq(&dev->execute_task_lock); | |
c66ac9db NB |
2413 | return 0; |
2414 | } | |
e3d6f909 AG |
2415 | task = list_first_entry(&dev->execute_task_list, |
2416 | struct se_task, t_execute_list); | |
2417 | list_del(&task->t_execute_list); | |
2418 | atomic_set(&task->task_execute_queue, 0); | |
2419 | atomic_dec(&dev->execute_tasks); | |
2420 | spin_unlock_irq(&dev->execute_task_lock); | |
c66ac9db NB |
2421 | |
2422 | atomic_dec(&dev->depth_left); | |
c66ac9db | 2423 | |
e3d6f909 | 2424 | cmd = task->task_se_cmd; |
c66ac9db | 2425 | |
a1d8b49a | 2426 | spin_lock_irqsave(&cmd->t_state_lock, flags); |
c66ac9db NB |
2427 | atomic_set(&task->task_active, 1); |
2428 | atomic_set(&task->task_sent, 1); | |
a1d8b49a | 2429 | atomic_inc(&cmd->t_task_cdbs_sent); |
c66ac9db | 2430 | |
a1d8b49a AG |
2431 | if (atomic_read(&cmd->t_task_cdbs_sent) == |
2432 | cmd->t_task_list_num) | |
c66ac9db NB |
2433 | atomic_set(&cmd->transport_sent, 1); |
2434 | ||
2435 | transport_start_task_timer(task); | |
a1d8b49a | 2436 | spin_unlock_irqrestore(&cmd->t_state_lock, flags); |
c66ac9db NB |
2437 | /* |
2438 | * The struct se_cmd->transport_emulate_cdb() function pointer is used | |
e3d6f909 | 2439 | * to grab REPORT_LUNS and other CDBs we want to handle before they hit the |
c66ac9db NB |
2440 | * struct se_subsystem_api->do_task() caller below. |
2441 | */ | |
2442 | if (cmd->transport_emulate_cdb) { | |
2443 | error = cmd->transport_emulate_cdb(cmd); | |
2444 | if (error != 0) { | |
2445 | cmd->transport_error_status = error; | |
2446 | atomic_set(&task->task_active, 0); | |
2447 | atomic_set(&cmd->transport_sent, 0); | |
2448 | transport_stop_tasks_for_cmd(cmd); | |
2449 | transport_generic_request_failure(cmd, dev, 0, 1); | |
2450 | goto check_depth; | |
2451 | } | |
2452 | /* | |
2453 | * Handle the successful completion for transport_emulate_cdb() | |
2454 | * for synchronous operation, following SCF_EMULATE_CDB_ASYNC | |
2455 | * Otherwise the caller is expected to complete the task with | |
2456 | * proper status. | |
2457 | */ | |
2458 | if (!(cmd->se_cmd_flags & SCF_EMULATE_CDB_ASYNC)) { | |
2459 | cmd->scsi_status = SAM_STAT_GOOD; | |
2460 | task->task_scsi_status = GOOD; | |
2461 | transport_complete_task(task, 1); | |
2462 | } | |
2463 | } else { | |
2464 | /* | |
2465 | * Currently for all virtual TCM plugins including IBLOCK, FILEIO and | |
2466 | * RAMDISK we use the internal transport_emulate_control_cdb() logic | |
2467 | * with struct se_subsystem_api callers for the primary SPC-3 TYPE_DISK | |
2468 | * LUN emulation code. | |
2469 | * | |
2470 | * For TCM/pSCSI and all other SCF_SCSI_DATA_SG_IO_CDB I/O tasks we | |
2471 | * call ->do_task() directly and let the underlying TCM subsystem plugin | |
2472 | * code handle the CDB emulation. | |
2473 | */ | |
e3d6f909 AG |
2474 | if ((dev->transport->transport_type != TRANSPORT_PLUGIN_PHBA_PDEV) && |
2475 | (!(task->task_se_cmd->se_cmd_flags & SCF_SCSI_DATA_SG_IO_CDB))) | |
c66ac9db NB |
2476 | error = transport_emulate_control_cdb(task); |
2477 | else | |
e3d6f909 | 2478 | error = dev->transport->do_task(task); |
c66ac9db NB |
2479 | |
2480 | if (error != 0) { | |
2481 | cmd->transport_error_status = error; | |
2482 | atomic_set(&task->task_active, 0); | |
2483 | atomic_set(&cmd->transport_sent, 0); | |
2484 | transport_stop_tasks_for_cmd(cmd); | |
2485 | transport_generic_request_failure(cmd, dev, 0, 1); | |
2486 | } | |
2487 | } | |
2488 | ||
2489 | goto check_depth; | |
2490 | ||
2491 | return 0; | |
2492 | } | |
2493 | ||
2494 | void transport_new_cmd_failure(struct se_cmd *se_cmd) | |
2495 | { | |
2496 | unsigned long flags; | |
2497 | /* | |
2498 | * Any unsolicited data will get dumped for failed command inside of | |
2499 | * the fabric plugin | |
2500 | */ | |
a1d8b49a | 2501 | spin_lock_irqsave(&se_cmd->t_state_lock, flags); |
c66ac9db NB |
2502 | se_cmd->se_cmd_flags |= SCF_SE_CMD_FAILED; |
2503 | se_cmd->se_cmd_flags |= SCF_SCSI_CDB_EXCEPTION; | |
a1d8b49a | 2504 | spin_unlock_irqrestore(&se_cmd->t_state_lock, flags); |
c66ac9db NB |
2505 | } |
2506 | ||
39c05f32 | 2507 | static void transport_nop_wait_for_tasks(struct se_cmd *, int); |
c66ac9db NB |
2508 | |
2509 | static inline u32 transport_get_sectors_6( | |
2510 | unsigned char *cdb, | |
2511 | struct se_cmd *cmd, | |
2512 | int *ret) | |
2513 | { | |
5951146d | 2514 | struct se_device *dev = cmd->se_dev; |
c66ac9db NB |
2515 | |
2516 | /* | |
2517 | * Assume TYPE_DISK for non struct se_device objects. | |
2518 | * Use 8-bit sector value. | |
2519 | */ | |
2520 | if (!dev) | |
2521 | goto type_disk; | |
2522 | ||
2523 | /* | |
2524 | * Use 24-bit allocation length for TYPE_TAPE. | |
2525 | */ | |
e3d6f909 | 2526 | if (dev->transport->get_device_type(dev) == TYPE_TAPE) |
c66ac9db NB |
2527 | return (u32)(cdb[2] << 16) + (cdb[3] << 8) + cdb[4]; |
2528 | ||
2529 | /* | |
2530 | * Everything else assume TYPE_DISK Sector CDB location. | |
2531 | * Use 8-bit sector value. | |
2532 | */ | |
2533 | type_disk: | |
2534 | return (u32)cdb[4]; | |
2535 | } | |
2536 | ||
2537 | static inline u32 transport_get_sectors_10( | |
2538 | unsigned char *cdb, | |
2539 | struct se_cmd *cmd, | |
2540 | int *ret) | |
2541 | { | |
5951146d | 2542 | struct se_device *dev = cmd->se_dev; |
c66ac9db NB |
2543 | |
2544 | /* | |
2545 | * Assume TYPE_DISK for non struct se_device objects. | |
2546 | * Use 16-bit sector value. | |
2547 | */ | |
2548 | if (!dev) | |
2549 | goto type_disk; | |
2550 | ||
2551 | /* | |
2552 | * XXX_10 is not defined in SSC, throw an exception | |
2553 | */ | |
e3d6f909 AG |
2554 | if (dev->transport->get_device_type(dev) == TYPE_TAPE) { |
2555 | *ret = -EINVAL; | |
c66ac9db NB |
2556 | return 0; |
2557 | } | |
2558 | ||
2559 | /* | |
2560 | * Everything else assume TYPE_DISK Sector CDB location. | |
2561 | * Use 16-bit sector value. | |
2562 | */ | |
2563 | type_disk: | |
2564 | return (u32)(cdb[7] << 8) + cdb[8]; | |
2565 | } | |
2566 | ||
2567 | static inline u32 transport_get_sectors_12( | |
2568 | unsigned char *cdb, | |
2569 | struct se_cmd *cmd, | |
2570 | int *ret) | |
2571 | { | |
5951146d | 2572 | struct se_device *dev = cmd->se_dev; |
c66ac9db NB |
2573 | |
2574 | /* | |
2575 | * Assume TYPE_DISK for non struct se_device objects. | |
2576 | * Use 32-bit sector value. | |
2577 | */ | |
2578 | if (!dev) | |
2579 | goto type_disk; | |
2580 | ||
2581 | /* | |
2582 | * XXX_12 is not defined in SSC, throw an exception | |
2583 | */ | |
e3d6f909 AG |
2584 | if (dev->transport->get_device_type(dev) == TYPE_TAPE) { |
2585 | *ret = -EINVAL; | |
c66ac9db NB |
2586 | return 0; |
2587 | } | |
2588 | ||
2589 | /* | |
2590 | * Everything else assume TYPE_DISK Sector CDB location. | |
2591 | * Use 32-bit sector value. | |
2592 | */ | |
2593 | type_disk: | |
2594 | return (u32)(cdb[6] << 24) + (cdb[7] << 16) + (cdb[8] << 8) + cdb[9]; | |
2595 | } | |
2596 | ||
2597 | static inline u32 transport_get_sectors_16( | |
2598 | unsigned char *cdb, | |
2599 | struct se_cmd *cmd, | |
2600 | int *ret) | |
2601 | { | |
5951146d | 2602 | struct se_device *dev = cmd->se_dev; |
c66ac9db NB |
2603 | |
2604 | /* | |
2605 | * Assume TYPE_DISK for non struct se_device objects. | |
2606 | * Use 32-bit sector value. | |
2607 | */ | |
2608 | if (!dev) | |
2609 | goto type_disk; | |
2610 | ||
2611 | /* | |
2612 | * Use 24-bit allocation length for TYPE_TAPE. | |
2613 | */ | |
e3d6f909 | 2614 | if (dev->transport->get_device_type(dev) == TYPE_TAPE) |
c66ac9db NB |
2615 | return (u32)(cdb[12] << 16) + (cdb[13] << 8) + cdb[14]; |
2616 | ||
2617 | type_disk: | |
2618 | return (u32)(cdb[10] << 24) + (cdb[11] << 16) + | |
2619 | (cdb[12] << 8) + cdb[13]; | |
2620 | } | |
2621 | ||
2622 | /* | |
2623 | * Used for VARIABLE_LENGTH_CDB WRITE_32 and READ_32 variants | |
2624 | */ | |
2625 | static inline u32 transport_get_sectors_32( | |
2626 | unsigned char *cdb, | |
2627 | struct se_cmd *cmd, | |
2628 | int *ret) | |
2629 | { | |
2630 | /* | |
2631 | * Assume TYPE_DISK for non struct se_device objects. | |
2632 | * Use 32-bit sector value. | |
2633 | */ | |
2634 | return (u32)(cdb[28] << 24) + (cdb[29] << 16) + | |
2635 | (cdb[30] << 8) + cdb[31]; | |
2636 | ||
2637 | } | |
2638 | ||
2639 | static inline u32 transport_get_size( | |
2640 | u32 sectors, | |
2641 | unsigned char *cdb, | |
2642 | struct se_cmd *cmd) | |
2643 | { | |
5951146d | 2644 | struct se_device *dev = cmd->se_dev; |
c66ac9db | 2645 | |
e3d6f909 | 2646 | if (dev->transport->get_device_type(dev) == TYPE_TAPE) { |
c66ac9db | 2647 | if (cdb[1] & 1) { /* sectors */ |
e3d6f909 | 2648 | return dev->se_sub_dev->se_dev_attrib.block_size * sectors; |
c66ac9db NB |
2649 | } else /* bytes */ |
2650 | return sectors; | |
2651 | } | |
2652 | #if 0 | |
6708bb27 | 2653 | pr_debug("Returning block_size: %u, sectors: %u == %u for" |
e3d6f909 AG |
2654 | " %s object\n", dev->se_sub_dev->se_dev_attrib.block_size, sectors, |
2655 | dev->se_sub_dev->se_dev_attrib.block_size * sectors, | |
2656 | dev->transport->name); | |
c66ac9db | 2657 | #endif |
e3d6f909 | 2658 | return dev->se_sub_dev->se_dev_attrib.block_size * sectors; |
c66ac9db NB |
2659 | } |
2660 | ||
c66ac9db NB |
2661 | static void transport_xor_callback(struct se_cmd *cmd) |
2662 | { | |
2663 | unsigned char *buf, *addr; | |
ec98f782 | 2664 | struct scatterlist *sg; |
c66ac9db NB |
2665 | unsigned int offset; |
2666 | int i; | |
ec98f782 | 2667 | int count; |
c66ac9db NB |
2668 | /* |
2669 | * From sbc3r22.pdf section 5.48 XDWRITEREAD (10) command | |
2670 | * | |
2671 | * 1) read the specified logical block(s); | |
2672 | * 2) transfer logical blocks from the data-out buffer; | |
2673 | * 3) XOR the logical blocks transferred from the data-out buffer with | |
2674 | * the logical blocks read, storing the resulting XOR data in a buffer; | |
2675 | * 4) if the DISABLE WRITE bit is set to zero, then write the logical | |
2676 | * blocks transferred from the data-out buffer; and | |
2677 | * 5) transfer the resulting XOR data to the data-in buffer. | |
2678 | */ | |
2679 | buf = kmalloc(cmd->data_length, GFP_KERNEL); | |
6708bb27 AG |
2680 | if (!buf) { |
2681 | pr_err("Unable to allocate xor_callback buf\n"); | |
c66ac9db NB |
2682 | return; |
2683 | } | |
2684 | /* | |
ec98f782 | 2685 | * Copy the scatterlist WRITE buffer located at cmd->t_data_sg |
c66ac9db NB |
2686 | * into the locally allocated *buf |
2687 | */ | |
ec98f782 AG |
2688 | sg_copy_to_buffer(cmd->t_data_sg, |
2689 | cmd->t_data_nents, | |
2690 | buf, | |
2691 | cmd->data_length); | |
2692 | ||
c66ac9db NB |
2693 | /* |
2694 | * Now perform the XOR against the BIDI read memory located at | |
a1d8b49a | 2695 | * cmd->t_mem_bidi_list |
c66ac9db NB |
2696 | */ |
2697 | ||
2698 | offset = 0; | |
ec98f782 AG |
2699 | for_each_sg(cmd->t_bidi_data_sg, sg, cmd->t_bidi_data_nents, count) { |
2700 | addr = kmap_atomic(sg_page(sg), KM_USER0); | |
2701 | if (!addr) | |
c66ac9db NB |
2702 | goto out; |
2703 | ||
ec98f782 AG |
2704 | for (i = 0; i < sg->length; i++) |
2705 | *(addr + sg->offset + i) ^= *(buf + offset + i); | |
c66ac9db | 2706 | |
ec98f782 | 2707 | offset += sg->length; |
c66ac9db NB |
2708 | kunmap_atomic(addr, KM_USER0); |
2709 | } | |
ec98f782 | 2710 | |
c66ac9db NB |
2711 | out: |
2712 | kfree(buf); | |
2713 | } | |
2714 | ||
2715 | /* | |
2716 | * Used to obtain Sense Data from underlying Linux/SCSI struct scsi_cmnd | |
2717 | */ | |
2718 | static int transport_get_sense_data(struct se_cmd *cmd) | |
2719 | { | |
2720 | unsigned char *buffer = cmd->sense_buffer, *sense_buffer = NULL; | |
2721 | struct se_device *dev; | |
2722 | struct se_task *task = NULL, *task_tmp; | |
2723 | unsigned long flags; | |
2724 | u32 offset = 0; | |
2725 | ||
e3d6f909 AG |
2726 | WARN_ON(!cmd->se_lun); |
2727 | ||
a1d8b49a | 2728 | spin_lock_irqsave(&cmd->t_state_lock, flags); |
c66ac9db | 2729 | if (cmd->se_cmd_flags & SCF_SENT_CHECK_CONDITION) { |
a1d8b49a | 2730 | spin_unlock_irqrestore(&cmd->t_state_lock, flags); |
c66ac9db NB |
2731 | return 0; |
2732 | } | |
2733 | ||
2734 | list_for_each_entry_safe(task, task_tmp, | |
a1d8b49a | 2735 | &cmd->t_task_list, t_list) { |
c66ac9db NB |
2736 | |
2737 | if (!task->task_sense) | |
2738 | continue; | |
2739 | ||
2740 | dev = task->se_dev; | |
6708bb27 | 2741 | if (!dev) |
c66ac9db NB |
2742 | continue; |
2743 | ||
e3d6f909 | 2744 | if (!dev->transport->get_sense_buffer) { |
6708bb27 | 2745 | pr_err("dev->transport->get_sense_buffer" |
c66ac9db NB |
2746 | " is NULL\n"); |
2747 | continue; | |
2748 | } | |
2749 | ||
e3d6f909 | 2750 | sense_buffer = dev->transport->get_sense_buffer(task); |
6708bb27 AG |
2751 | if (!sense_buffer) { |
2752 | pr_err("ITT[0x%08x]_TASK[%d]: Unable to locate" | |
c66ac9db | 2753 | " sense buffer for task with sense\n", |
e3d6f909 | 2754 | cmd->se_tfo->get_task_tag(cmd), task->task_no); |
c66ac9db NB |
2755 | continue; |
2756 | } | |
a1d8b49a | 2757 | spin_unlock_irqrestore(&cmd->t_state_lock, flags); |
c66ac9db | 2758 | |
e3d6f909 | 2759 | offset = cmd->se_tfo->set_fabric_sense_len(cmd, |
c66ac9db NB |
2760 | TRANSPORT_SENSE_BUFFER); |
2761 | ||
5951146d | 2762 | memcpy(&buffer[offset], sense_buffer, |
c66ac9db NB |
2763 | TRANSPORT_SENSE_BUFFER); |
2764 | cmd->scsi_status = task->task_scsi_status; | |
2765 | /* Automatically padded */ | |
2766 | cmd->scsi_sense_length = | |
2767 | (TRANSPORT_SENSE_BUFFER + offset); | |
2768 | ||
6708bb27 | 2769 | pr_debug("HBA_[%u]_PLUG[%s]: Set SAM STATUS: 0x%02x" |
c66ac9db | 2770 | " and sense\n", |
e3d6f909 | 2771 | dev->se_hba->hba_id, dev->transport->name, |
c66ac9db NB |
2772 | cmd->scsi_status); |
2773 | return 0; | |
2774 | } | |
a1d8b49a | 2775 | spin_unlock_irqrestore(&cmd->t_state_lock, flags); |
c66ac9db NB |
2776 | |
2777 | return -1; | |
2778 | } | |
2779 | ||
c66ac9db NB |
2780 | static int |
2781 | transport_handle_reservation_conflict(struct se_cmd *cmd) | |
2782 | { | |
2783 | cmd->transport_wait_for_tasks = &transport_nop_wait_for_tasks; | |
2784 | cmd->se_cmd_flags |= SCF_SCSI_CDB_EXCEPTION; | |
2785 | cmd->se_cmd_flags |= SCF_SCSI_RESERVATION_CONFLICT; | |
2786 | cmd->scsi_status = SAM_STAT_RESERVATION_CONFLICT; | |
2787 | /* | |
2788 | * For UA Interlock Code 11b, a RESERVATION CONFLICT will | |
2789 | * establish a UNIT ATTENTION with PREVIOUS RESERVATION | |
2790 | * CONFLICT STATUS. | |
2791 | * | |
2792 | * See spc4r17, section 7.4.6 Control Mode Page, Table 349 | |
2793 | */ | |
e3d6f909 AG |
2794 | if (cmd->se_sess && |
2795 | cmd->se_dev->se_sub_dev->se_dev_attrib.emulate_ua_intlck_ctrl == 2) | |
2796 | core_scsi3_ua_allocate(cmd->se_sess->se_node_acl, | |
c66ac9db NB |
2797 | cmd->orig_fe_lun, 0x2C, |
2798 | ASCQ_2CH_PREVIOUS_RESERVATION_CONFLICT_STATUS); | |
5951146d | 2799 | return -EINVAL; |
c66ac9db NB |
2800 | } |
2801 | ||
ec98f782 AG |
2802 | static inline long long transport_dev_end_lba(struct se_device *dev) |
2803 | { | |
2804 | return dev->transport->get_blocks(dev) + 1; | |
2805 | } | |
2806 | ||
2807 | static int transport_cmd_get_valid_sectors(struct se_cmd *cmd) | |
2808 | { | |
2809 | struct se_device *dev = cmd->se_dev; | |
2810 | u32 sectors; | |
2811 | ||
2812 | if (dev->transport->get_device_type(dev) != TYPE_DISK) | |
2813 | return 0; | |
2814 | ||
2815 | sectors = (cmd->data_length / dev->se_sub_dev->se_dev_attrib.block_size); | |
2816 | ||
6708bb27 AG |
2817 | if ((cmd->t_task_lba + sectors) > transport_dev_end_lba(dev)) { |
2818 | pr_err("LBA: %llu Sectors: %u exceeds" | |
ec98f782 AG |
2819 | " transport_dev_end_lba(): %llu\n", |
2820 | cmd->t_task_lba, sectors, | |
2821 | transport_dev_end_lba(dev)); | |
7abbe7f3 | 2822 | return -EINVAL; |
ec98f782 AG |
2823 | } |
2824 | ||
7abbe7f3 | 2825 | return 0; |
ec98f782 AG |
2826 | } |
2827 | ||
706d5860 NB |
2828 | static int target_check_write_same_discard(unsigned char *flags, struct se_device *dev) |
2829 | { | |
2830 | /* | |
2831 | * Determine if the received WRITE_SAME is used to for direct | |
2832 | * passthrough into Linux/SCSI with struct request via TCM/pSCSI | |
2833 | * or we are signaling the use of internal WRITE_SAME + UNMAP=1 | |
2834 | * emulation for -> Linux/BLOCK disbard with TCM/IBLOCK code. | |
2835 | */ | |
2836 | int passthrough = (dev->transport->transport_type == | |
2837 | TRANSPORT_PLUGIN_PHBA_PDEV); | |
2838 | ||
2839 | if (!passthrough) { | |
2840 | if ((flags[0] & 0x04) || (flags[0] & 0x02)) { | |
2841 | pr_err("WRITE_SAME PBDATA and LBDATA" | |
2842 | " bits not supported for Block Discard" | |
2843 | " Emulation\n"); | |
2844 | return -ENOSYS; | |
2845 | } | |
2846 | /* | |
2847 | * Currently for the emulated case we only accept | |
2848 | * tpws with the UNMAP=1 bit set. | |
2849 | */ | |
2850 | if (!(flags[0] & 0x08)) { | |
2851 | pr_err("WRITE_SAME w/o UNMAP bit not" | |
2852 | " supported for Block Discard Emulation\n"); | |
2853 | return -ENOSYS; | |
2854 | } | |
2855 | } | |
2856 | ||
2857 | return 0; | |
2858 | } | |
2859 | ||
c66ac9db NB |
2860 | /* transport_generic_cmd_sequencer(): |
2861 | * | |
2862 | * Generic Command Sequencer that should work for most DAS transport | |
2863 | * drivers. | |
2864 | * | |
2865 | * Called from transport_generic_allocate_tasks() in the $FABRIC_MOD | |
2866 | * RX Thread. | |
2867 | * | |
2868 | * FIXME: Need to support other SCSI OPCODES where as well. | |
2869 | */ | |
2870 | static int transport_generic_cmd_sequencer( | |
2871 | struct se_cmd *cmd, | |
2872 | unsigned char *cdb) | |
2873 | { | |
5951146d | 2874 | struct se_device *dev = cmd->se_dev; |
c66ac9db NB |
2875 | struct se_subsystem_dev *su_dev = dev->se_sub_dev; |
2876 | int ret = 0, sector_ret = 0, passthrough; | |
2877 | u32 sectors = 0, size = 0, pr_reg_type = 0; | |
2878 | u16 service_action; | |
2879 | u8 alua_ascq = 0; | |
2880 | /* | |
2881 | * Check for an existing UNIT ATTENTION condition | |
2882 | */ | |
2883 | if (core_scsi3_ua_check(cmd, cdb) < 0) { | |
2884 | cmd->transport_wait_for_tasks = | |
2885 | &transport_nop_wait_for_tasks; | |
2886 | cmd->se_cmd_flags |= SCF_SCSI_CDB_EXCEPTION; | |
2887 | cmd->scsi_sense_reason = TCM_CHECK_CONDITION_UNIT_ATTENTION; | |
5951146d | 2888 | return -EINVAL; |
c66ac9db NB |
2889 | } |
2890 | /* | |
2891 | * Check status of Asymmetric Logical Unit Assignment port | |
2892 | */ | |
e3d6f909 | 2893 | ret = su_dev->t10_alua.alua_state_check(cmd, cdb, &alua_ascq); |
c66ac9db NB |
2894 | if (ret != 0) { |
2895 | cmd->transport_wait_for_tasks = &transport_nop_wait_for_tasks; | |
2896 | /* | |
25985edc | 2897 | * Set SCSI additional sense code (ASC) to 'LUN Not Accessible'; |
c66ac9db NB |
2898 | * The ALUA additional sense code qualifier (ASCQ) is determined |
2899 | * by the ALUA primary or secondary access state.. | |
2900 | */ | |
2901 | if (ret > 0) { | |
2902 | #if 0 | |
6708bb27 | 2903 | pr_debug("[%s]: ALUA TG Port not available," |
c66ac9db | 2904 | " SenseKey: NOT_READY, ASC/ASCQ: 0x04/0x%02x\n", |
e3d6f909 | 2905 | cmd->se_tfo->get_fabric_name(), alua_ascq); |
c66ac9db NB |
2906 | #endif |
2907 | transport_set_sense_codes(cmd, 0x04, alua_ascq); | |
2908 | cmd->se_cmd_flags |= SCF_SCSI_CDB_EXCEPTION; | |
2909 | cmd->scsi_sense_reason = TCM_CHECK_CONDITION_NOT_READY; | |
5951146d | 2910 | return -EINVAL; |
c66ac9db NB |
2911 | } |
2912 | goto out_invalid_cdb_field; | |
2913 | } | |
2914 | /* | |
2915 | * Check status for SPC-3 Persistent Reservations | |
2916 | */ | |
e3d6f909 AG |
2917 | if (su_dev->t10_pr.pr_ops.t10_reservation_check(cmd, &pr_reg_type) != 0) { |
2918 | if (su_dev->t10_pr.pr_ops.t10_seq_non_holder( | |
c66ac9db NB |
2919 | cmd, cdb, pr_reg_type) != 0) |
2920 | return transport_handle_reservation_conflict(cmd); | |
2921 | /* | |
2922 | * This means the CDB is allowed for the SCSI Initiator port | |
2923 | * when said port is *NOT* holding the legacy SPC-2 or | |
2924 | * SPC-3 Persistent Reservation. | |
2925 | */ | |
2926 | } | |
2927 | ||
2928 | switch (cdb[0]) { | |
2929 | case READ_6: | |
2930 | sectors = transport_get_sectors_6(cdb, cmd, §or_ret); | |
2931 | if (sector_ret) | |
2932 | goto out_unsupported_cdb; | |
2933 | size = transport_get_size(sectors, cdb, cmd); | |
2934 | cmd->transport_split_cdb = &split_cdb_XX_6; | |
a1d8b49a | 2935 | cmd->t_task_lba = transport_lba_21(cdb); |
c66ac9db NB |
2936 | cmd->se_cmd_flags |= SCF_SCSI_DATA_SG_IO_CDB; |
2937 | break; | |
2938 | case READ_10: | |
2939 | sectors = transport_get_sectors_10(cdb, cmd, §or_ret); | |
2940 | if (sector_ret) | |
2941 | goto out_unsupported_cdb; | |
2942 | size = transport_get_size(sectors, cdb, cmd); | |
2943 | cmd->transport_split_cdb = &split_cdb_XX_10; | |
a1d8b49a | 2944 | cmd->t_task_lba = transport_lba_32(cdb); |
c66ac9db NB |
2945 | cmd->se_cmd_flags |= SCF_SCSI_DATA_SG_IO_CDB; |
2946 | break; | |
2947 | case READ_12: | |
2948 | sectors = transport_get_sectors_12(cdb, cmd, §or_ret); | |
2949 | if (sector_ret) | |
2950 | goto out_unsupported_cdb; | |
2951 | size = transport_get_size(sectors, cdb, cmd); | |
2952 | cmd->transport_split_cdb = &split_cdb_XX_12; | |
a1d8b49a | 2953 | cmd->t_task_lba = transport_lba_32(cdb); |
c66ac9db NB |
2954 | cmd->se_cmd_flags |= SCF_SCSI_DATA_SG_IO_CDB; |
2955 | break; | |
2956 | case READ_16: | |
2957 | sectors = transport_get_sectors_16(cdb, cmd, §or_ret); | |
2958 | if (sector_ret) | |
2959 | goto out_unsupported_cdb; | |
2960 | size = transport_get_size(sectors, cdb, cmd); | |
2961 | cmd->transport_split_cdb = &split_cdb_XX_16; | |
a1d8b49a | 2962 | cmd->t_task_lba = transport_lba_64(cdb); |
c66ac9db NB |
2963 | cmd->se_cmd_flags |= SCF_SCSI_DATA_SG_IO_CDB; |
2964 | break; | |
2965 | case WRITE_6: | |
2966 | sectors = transport_get_sectors_6(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_6; | |
a1d8b49a | 2971 | cmd->t_task_lba = transport_lba_21(cdb); |
c66ac9db NB |
2972 | cmd->se_cmd_flags |= SCF_SCSI_DATA_SG_IO_CDB; |
2973 | break; | |
2974 | case WRITE_10: | |
2975 | sectors = transport_get_sectors_10(cdb, cmd, §or_ret); | |
2976 | if (sector_ret) | |
2977 | goto out_unsupported_cdb; | |
2978 | size = transport_get_size(sectors, cdb, cmd); | |
2979 | cmd->transport_split_cdb = &split_cdb_XX_10; | |
a1d8b49a AG |
2980 | cmd->t_task_lba = transport_lba_32(cdb); |
2981 | cmd->t_tasks_fua = (cdb[1] & 0x8); | |
c66ac9db NB |
2982 | cmd->se_cmd_flags |= SCF_SCSI_DATA_SG_IO_CDB; |
2983 | break; | |
2984 | case WRITE_12: | |
2985 | sectors = transport_get_sectors_12(cdb, cmd, §or_ret); | |
2986 | if (sector_ret) | |
2987 | goto out_unsupported_cdb; | |
2988 | size = transport_get_size(sectors, cdb, cmd); | |
2989 | cmd->transport_split_cdb = &split_cdb_XX_12; | |
a1d8b49a AG |
2990 | cmd->t_task_lba = transport_lba_32(cdb); |
2991 | cmd->t_tasks_fua = (cdb[1] & 0x8); | |
c66ac9db NB |
2992 | cmd->se_cmd_flags |= SCF_SCSI_DATA_SG_IO_CDB; |
2993 | break; | |
2994 | case WRITE_16: | |
2995 | sectors = transport_get_sectors_16(cdb, cmd, §or_ret); | |
2996 | if (sector_ret) | |
2997 | goto out_unsupported_cdb; | |
2998 | size = transport_get_size(sectors, cdb, cmd); | |
2999 | cmd->transport_split_cdb = &split_cdb_XX_16; | |
a1d8b49a AG |
3000 | cmd->t_task_lba = transport_lba_64(cdb); |
3001 | cmd->t_tasks_fua = (cdb[1] & 0x8); | |
c66ac9db NB |
3002 | cmd->se_cmd_flags |= SCF_SCSI_DATA_SG_IO_CDB; |
3003 | break; | |
3004 | case XDWRITEREAD_10: | |
3005 | if ((cmd->data_direction != DMA_TO_DEVICE) || | |
a1d8b49a | 3006 | !(cmd->t_tasks_bidi)) |
c66ac9db NB |
3007 | goto out_invalid_cdb_field; |
3008 | sectors = transport_get_sectors_10(cdb, cmd, §or_ret); | |
3009 | if (sector_ret) | |
3010 | goto out_unsupported_cdb; | |
3011 | size = transport_get_size(sectors, cdb, cmd); | |
3012 | cmd->transport_split_cdb = &split_cdb_XX_10; | |
a1d8b49a | 3013 | cmd->t_task_lba = transport_lba_32(cdb); |
c66ac9db | 3014 | cmd->se_cmd_flags |= SCF_SCSI_DATA_SG_IO_CDB; |
e3d6f909 | 3015 | passthrough = (dev->transport->transport_type == |
c66ac9db NB |
3016 | TRANSPORT_PLUGIN_PHBA_PDEV); |
3017 | /* | |
3018 | * Skip the remaining assignments for TCM/PSCSI passthrough | |
3019 | */ | |
3020 | if (passthrough) | |
3021 | break; | |
3022 | /* | |
3023 | * Setup BIDI XOR callback to be run during transport_generic_complete_ok() | |
3024 | */ | |
3025 | cmd->transport_complete_callback = &transport_xor_callback; | |
a1d8b49a | 3026 | cmd->t_tasks_fua = (cdb[1] & 0x8); |
c66ac9db NB |
3027 | break; |
3028 | case VARIABLE_LENGTH_CMD: | |
3029 | service_action = get_unaligned_be16(&cdb[8]); | |
3030 | /* | |
3031 | * Determine if this is TCM/PSCSI device and we should disable | |
3032 | * internal emulation for this CDB. | |
3033 | */ | |
e3d6f909 | 3034 | passthrough = (dev->transport->transport_type == |
c66ac9db NB |
3035 | TRANSPORT_PLUGIN_PHBA_PDEV); |
3036 | ||
3037 | switch (service_action) { | |
3038 | case XDWRITEREAD_32: | |
3039 | sectors = transport_get_sectors_32(cdb, cmd, §or_ret); | |
3040 | if (sector_ret) | |
3041 | goto out_unsupported_cdb; | |
3042 | size = transport_get_size(sectors, cdb, cmd); | |
3043 | /* | |
3044 | * Use WRITE_32 and READ_32 opcodes for the emulated | |
3045 | * XDWRITE_READ_32 logic. | |
3046 | */ | |
3047 | cmd->transport_split_cdb = &split_cdb_XX_32; | |
a1d8b49a | 3048 | cmd->t_task_lba = transport_lba_64_ext(cdb); |
c66ac9db NB |
3049 | cmd->se_cmd_flags |= SCF_SCSI_DATA_SG_IO_CDB; |
3050 | ||
3051 | /* | |
3052 | * Skip the remaining assignments for TCM/PSCSI passthrough | |
3053 | */ | |
3054 | if (passthrough) | |
3055 | break; | |
3056 | ||
3057 | /* | |
3058 | * Setup BIDI XOR callback to be run during | |
3059 | * transport_generic_complete_ok() | |
3060 | */ | |
3061 | cmd->transport_complete_callback = &transport_xor_callback; | |
a1d8b49a | 3062 | cmd->t_tasks_fua = (cdb[10] & 0x8); |
c66ac9db NB |
3063 | break; |
3064 | case WRITE_SAME_32: | |
3065 | sectors = transport_get_sectors_32(cdb, cmd, §or_ret); | |
3066 | if (sector_ret) | |
3067 | goto out_unsupported_cdb; | |
dd3a5ad8 | 3068 | |
6708bb27 | 3069 | if (sectors) |
12850626 | 3070 | size = transport_get_size(1, cdb, cmd); |
6708bb27 AG |
3071 | else { |
3072 | pr_err("WSNZ=1, WRITE_SAME w/sectors=0 not" | |
3073 | " supported\n"); | |
3074 | goto out_invalid_cdb_field; | |
3075 | } | |
dd3a5ad8 | 3076 | |
a1d8b49a | 3077 | cmd->t_task_lba = get_unaligned_be64(&cdb[12]); |
c66ac9db NB |
3078 | cmd->se_cmd_flags |= SCF_SCSI_CONTROL_SG_IO_CDB; |
3079 | ||
706d5860 | 3080 | if (target_check_write_same_discard(&cdb[10], dev) < 0) |
c66ac9db | 3081 | goto out_invalid_cdb_field; |
706d5860 | 3082 | |
c66ac9db NB |
3083 | break; |
3084 | default: | |
6708bb27 | 3085 | pr_err("VARIABLE_LENGTH_CMD service action" |
c66ac9db NB |
3086 | " 0x%04x not supported\n", service_action); |
3087 | goto out_unsupported_cdb; | |
3088 | } | |
3089 | break; | |
e434f1f1 | 3090 | case MAINTENANCE_IN: |
e3d6f909 | 3091 | if (dev->transport->get_device_type(dev) != TYPE_ROM) { |
c66ac9db NB |
3092 | /* MAINTENANCE_IN from SCC-2 */ |
3093 | /* | |
3094 | * Check for emulated MI_REPORT_TARGET_PGS. | |
3095 | */ | |
3096 | if (cdb[1] == MI_REPORT_TARGET_PGS) { | |
3097 | cmd->transport_emulate_cdb = | |
e3d6f909 | 3098 | (su_dev->t10_alua.alua_type == |
c66ac9db | 3099 | SPC3_ALUA_EMULATED) ? |
e3d6f909 | 3100 | core_emulate_report_target_port_groups : |
c66ac9db NB |
3101 | NULL; |
3102 | } | |
3103 | size = (cdb[6] << 24) | (cdb[7] << 16) | | |
3104 | (cdb[8] << 8) | cdb[9]; | |
3105 | } else { | |
3106 | /* GPCMD_SEND_KEY from multi media commands */ | |
3107 | size = (cdb[8] << 8) + cdb[9]; | |
3108 | } | |
05d1c7c0 | 3109 | cmd->se_cmd_flags |= SCF_SCSI_CONTROL_SG_IO_CDB; |
c66ac9db NB |
3110 | break; |
3111 | case MODE_SELECT: | |
3112 | size = cdb[4]; | |
3113 | cmd->se_cmd_flags |= SCF_SCSI_CONTROL_SG_IO_CDB; | |
3114 | break; | |
3115 | case MODE_SELECT_10: | |
3116 | size = (cdb[7] << 8) + cdb[8]; | |
3117 | cmd->se_cmd_flags |= SCF_SCSI_CONTROL_SG_IO_CDB; | |
3118 | break; | |
3119 | case MODE_SENSE: | |
3120 | size = cdb[4]; | |
05d1c7c0 | 3121 | cmd->se_cmd_flags |= SCF_SCSI_CONTROL_SG_IO_CDB; |
c66ac9db NB |
3122 | break; |
3123 | case MODE_SENSE_10: | |
3124 | case GPCMD_READ_BUFFER_CAPACITY: | |
3125 | case GPCMD_SEND_OPC: | |
3126 | case LOG_SELECT: | |
3127 | case LOG_SENSE: | |
3128 | size = (cdb[7] << 8) + cdb[8]; | |
05d1c7c0 | 3129 | cmd->se_cmd_flags |= SCF_SCSI_CONTROL_SG_IO_CDB; |
c66ac9db NB |
3130 | break; |
3131 | case READ_BLOCK_LIMITS: | |
3132 | size = READ_BLOCK_LEN; | |
05d1c7c0 | 3133 | cmd->se_cmd_flags |= SCF_SCSI_CONTROL_SG_IO_CDB; |
c66ac9db NB |
3134 | break; |
3135 | case GPCMD_GET_CONFIGURATION: | |
3136 | case GPCMD_READ_FORMAT_CAPACITIES: | |
3137 | case GPCMD_READ_DISC_INFO: | |
3138 | case GPCMD_READ_TRACK_RZONE_INFO: | |
3139 | size = (cdb[7] << 8) + cdb[8]; | |
3140 | cmd->se_cmd_flags |= SCF_SCSI_CONTROL_SG_IO_CDB; | |
3141 | break; | |
3142 | case PERSISTENT_RESERVE_IN: | |
3143 | case PERSISTENT_RESERVE_OUT: | |
3144 | cmd->transport_emulate_cdb = | |
e3d6f909 | 3145 | (su_dev->t10_pr.res_type == |
c66ac9db | 3146 | SPC3_PERSISTENT_RESERVATIONS) ? |
e3d6f909 | 3147 | core_scsi3_emulate_pr : NULL; |
c66ac9db | 3148 | size = (cdb[7] << 8) + cdb[8]; |
05d1c7c0 | 3149 | cmd->se_cmd_flags |= SCF_SCSI_CONTROL_SG_IO_CDB; |
c66ac9db NB |
3150 | break; |
3151 | case GPCMD_MECHANISM_STATUS: | |
3152 | case GPCMD_READ_DVD_STRUCTURE: | |
3153 | size = (cdb[8] << 8) + cdb[9]; | |
3154 | cmd->se_cmd_flags |= SCF_SCSI_CONTROL_SG_IO_CDB; | |
3155 | break; | |
3156 | case READ_POSITION: | |
3157 | size = READ_POSITION_LEN; | |
05d1c7c0 | 3158 | cmd->se_cmd_flags |= SCF_SCSI_CONTROL_SG_IO_CDB; |
c66ac9db | 3159 | break; |
e434f1f1 | 3160 | case MAINTENANCE_OUT: |
e3d6f909 | 3161 | if (dev->transport->get_device_type(dev) != TYPE_ROM) { |
c66ac9db NB |
3162 | /* MAINTENANCE_OUT from SCC-2 |
3163 | * | |
3164 | * Check for emulated MO_SET_TARGET_PGS. | |
3165 | */ | |
3166 | if (cdb[1] == MO_SET_TARGET_PGS) { | |
3167 | cmd->transport_emulate_cdb = | |
e3d6f909 | 3168 | (su_dev->t10_alua.alua_type == |
c66ac9db | 3169 | SPC3_ALUA_EMULATED) ? |
e3d6f909 | 3170 | core_emulate_set_target_port_groups : |
c66ac9db NB |
3171 | NULL; |
3172 | } | |
3173 | ||
3174 | size = (cdb[6] << 24) | (cdb[7] << 16) | | |
3175 | (cdb[8] << 8) | cdb[9]; | |
3176 | } else { | |
3177 | /* GPCMD_REPORT_KEY from multi media commands */ | |
3178 | size = (cdb[8] << 8) + cdb[9]; | |
3179 | } | |
05d1c7c0 | 3180 | cmd->se_cmd_flags |= SCF_SCSI_CONTROL_SG_IO_CDB; |
c66ac9db NB |
3181 | break; |
3182 | case INQUIRY: | |
3183 | size = (cdb[3] << 8) + cdb[4]; | |
3184 | /* | |
3185 | * Do implict HEAD_OF_QUEUE processing for INQUIRY. | |
3186 | * See spc4r17 section 5.3 | |
3187 | */ | |
5951146d | 3188 | if (cmd->se_dev->dev_task_attr_type == SAM_TASK_ATTR_EMULATED) |
e66ecd50 | 3189 | cmd->sam_task_attr = MSG_HEAD_TAG; |
05d1c7c0 | 3190 | cmd->se_cmd_flags |= SCF_SCSI_CONTROL_SG_IO_CDB; |
c66ac9db NB |
3191 | break; |
3192 | case READ_BUFFER: | |
3193 | size = (cdb[6] << 16) + (cdb[7] << 8) + cdb[8]; | |
05d1c7c0 | 3194 | cmd->se_cmd_flags |= SCF_SCSI_CONTROL_SG_IO_CDB; |
c66ac9db NB |
3195 | break; |
3196 | case READ_CAPACITY: | |
3197 | size = READ_CAP_LEN; | |
05d1c7c0 | 3198 | cmd->se_cmd_flags |= SCF_SCSI_CONTROL_SG_IO_CDB; |
c66ac9db NB |
3199 | break; |
3200 | case READ_MEDIA_SERIAL_NUMBER: | |
3201 | case SECURITY_PROTOCOL_IN: | |
3202 | case SECURITY_PROTOCOL_OUT: | |
3203 | size = (cdb[6] << 24) | (cdb[7] << 16) | (cdb[8] << 8) | cdb[9]; | |
05d1c7c0 | 3204 | cmd->se_cmd_flags |= SCF_SCSI_CONTROL_SG_IO_CDB; |
c66ac9db NB |
3205 | break; |
3206 | case SERVICE_ACTION_IN: | |
3207 | case ACCESS_CONTROL_IN: | |
3208 | case ACCESS_CONTROL_OUT: | |
3209 | case EXTENDED_COPY: | |
3210 | case READ_ATTRIBUTE: | |
3211 | case RECEIVE_COPY_RESULTS: | |
3212 | case WRITE_ATTRIBUTE: | |
3213 | size = (cdb[10] << 24) | (cdb[11] << 16) | | |
3214 | (cdb[12] << 8) | cdb[13]; | |
05d1c7c0 | 3215 | cmd->se_cmd_flags |= SCF_SCSI_CONTROL_SG_IO_CDB; |
c66ac9db NB |
3216 | break; |
3217 | case RECEIVE_DIAGNOSTIC: | |
3218 | case SEND_DIAGNOSTIC: | |
3219 | size = (cdb[3] << 8) | cdb[4]; | |
05d1c7c0 | 3220 | cmd->se_cmd_flags |= SCF_SCSI_CONTROL_SG_IO_CDB; |
c66ac9db NB |
3221 | break; |
3222 | /* #warning FIXME: Figure out correct GPCMD_READ_CD blocksize. */ | |
3223 | #if 0 | |
3224 | case GPCMD_READ_CD: | |
3225 | sectors = (cdb[6] << 16) + (cdb[7] << 8) + cdb[8]; | |
3226 | size = (2336 * sectors); | |
05d1c7c0 | 3227 | cmd->se_cmd_flags |= SCF_SCSI_CONTROL_SG_IO_CDB; |
c66ac9db NB |
3228 | break; |
3229 | #endif | |
3230 | case READ_TOC: | |
3231 | size = cdb[8]; | |
05d1c7c0 | 3232 | cmd->se_cmd_flags |= SCF_SCSI_CONTROL_SG_IO_CDB; |
c66ac9db NB |
3233 | break; |
3234 | case REQUEST_SENSE: | |
3235 | size = cdb[4]; | |
05d1c7c0 | 3236 | cmd->se_cmd_flags |= SCF_SCSI_CONTROL_SG_IO_CDB; |
c66ac9db NB |
3237 | break; |
3238 | case READ_ELEMENT_STATUS: | |
3239 | size = 65536 * cdb[7] + 256 * cdb[8] + cdb[9]; | |
05d1c7c0 | 3240 | cmd->se_cmd_flags |= SCF_SCSI_CONTROL_SG_IO_CDB; |
c66ac9db NB |
3241 | break; |
3242 | case WRITE_BUFFER: | |
3243 | size = (cdb[6] << 16) + (cdb[7] << 8) + cdb[8]; | |
05d1c7c0 | 3244 | cmd->se_cmd_flags |= SCF_SCSI_CONTROL_SG_IO_CDB; |
c66ac9db NB |
3245 | break; |
3246 | case RESERVE: | |
3247 | case RESERVE_10: | |
3248 | /* | |
3249 | * The SPC-2 RESERVE does not contain a size in the SCSI CDB. | |
3250 | * Assume the passthrough or $FABRIC_MOD will tell us about it. | |
3251 | */ | |
3252 | if (cdb[0] == RESERVE_10) | |
3253 | size = (cdb[7] << 8) | cdb[8]; | |
3254 | else | |
3255 | size = cmd->data_length; | |
3256 | ||
3257 | /* | |
3258 | * Setup the legacy emulated handler for SPC-2 and | |
3259 | * >= SPC-3 compatible reservation handling (CRH=1) | |
3260 | * Otherwise, we assume the underlying SCSI logic is | |
3261 | * is running in SPC_PASSTHROUGH, and wants reservations | |
3262 | * emulation disabled. | |
3263 | */ | |
3264 | cmd->transport_emulate_cdb = | |
e3d6f909 | 3265 | (su_dev->t10_pr.res_type != |
c66ac9db | 3266 | SPC_PASSTHROUGH) ? |
e3d6f909 | 3267 | core_scsi2_emulate_crh : NULL; |
c66ac9db NB |
3268 | cmd->se_cmd_flags |= SCF_SCSI_NON_DATA_CDB; |
3269 | break; | |
3270 | case RELEASE: | |
3271 | case RELEASE_10: | |
3272 | /* | |
3273 | * The SPC-2 RELEASE does not contain a size in the SCSI CDB. | |
3274 | * Assume the passthrough or $FABRIC_MOD will tell us about it. | |
3275 | */ | |
3276 | if (cdb[0] == RELEASE_10) | |
3277 | size = (cdb[7] << 8) | cdb[8]; | |
3278 | else | |
3279 | size = cmd->data_length; | |
3280 | ||
3281 | cmd->transport_emulate_cdb = | |
e3d6f909 | 3282 | (su_dev->t10_pr.res_type != |
c66ac9db | 3283 | SPC_PASSTHROUGH) ? |
e3d6f909 | 3284 | core_scsi2_emulate_crh : NULL; |
c66ac9db NB |
3285 | cmd->se_cmd_flags |= SCF_SCSI_NON_DATA_CDB; |
3286 | break; | |
3287 | case SYNCHRONIZE_CACHE: | |
3288 | case 0x91: /* SYNCHRONIZE_CACHE_16: */ | |
3289 | /* | |
3290 | * Extract LBA and range to be flushed for emulated SYNCHRONIZE_CACHE | |
3291 | */ | |
3292 | if (cdb[0] == SYNCHRONIZE_CACHE) { | |
3293 | sectors = transport_get_sectors_10(cdb, cmd, §or_ret); | |
a1d8b49a | 3294 | cmd->t_task_lba = transport_lba_32(cdb); |
c66ac9db NB |
3295 | } else { |
3296 | sectors = transport_get_sectors_16(cdb, cmd, §or_ret); | |
a1d8b49a | 3297 | cmd->t_task_lba = transport_lba_64(cdb); |
c66ac9db NB |
3298 | } |
3299 | if (sector_ret) | |
3300 | goto out_unsupported_cdb; | |
3301 | ||
3302 | size = transport_get_size(sectors, cdb, cmd); | |
3303 | cmd->se_cmd_flags |= SCF_SCSI_NON_DATA_CDB; | |
3304 | ||
3305 | /* | |
3306 | * For TCM/pSCSI passthrough, skip cmd->transport_emulate_cdb() | |
3307 | */ | |
e3d6f909 | 3308 | if (dev->transport->transport_type == TRANSPORT_PLUGIN_PHBA_PDEV) |
c66ac9db NB |
3309 | break; |
3310 | /* | |
3311 | * Set SCF_EMULATE_CDB_ASYNC to ensure asynchronous operation | |
3312 | * for SYNCHRONIZE_CACHE* Immed=1 case in __transport_execute_tasks() | |
3313 | */ | |
3314 | cmd->se_cmd_flags |= SCF_EMULATE_CDB_ASYNC; | |
3315 | /* | |
3316 | * Check to ensure that LBA + Range does not exceed past end of | |
7abbe7f3 | 3317 | * device for IBLOCK and FILEIO ->do_sync_cache() backend calls |
c66ac9db | 3318 | */ |
7abbe7f3 NB |
3319 | if ((cmd->t_task_lba != 0) || (sectors != 0)) { |
3320 | if (transport_cmd_get_valid_sectors(cmd) < 0) | |
3321 | goto out_invalid_cdb_field; | |
3322 | } | |
c66ac9db NB |
3323 | break; |
3324 | case UNMAP: | |
3325 | size = get_unaligned_be16(&cdb[7]); | |
05d1c7c0 | 3326 | cmd->se_cmd_flags |= SCF_SCSI_CONTROL_SG_IO_CDB; |
c66ac9db NB |
3327 | break; |
3328 | case WRITE_SAME_16: | |
3329 | sectors = transport_get_sectors_16(cdb, cmd, §or_ret); | |
3330 | if (sector_ret) | |
3331 | goto out_unsupported_cdb; | |
dd3a5ad8 | 3332 | |
6708bb27 | 3333 | if (sectors) |
12850626 | 3334 | size = transport_get_size(1, cdb, cmd); |
6708bb27 AG |
3335 | else { |
3336 | pr_err("WSNZ=1, WRITE_SAME w/sectors=0 not supported\n"); | |
3337 | goto out_invalid_cdb_field; | |
3338 | } | |
dd3a5ad8 | 3339 | |
5db0753b | 3340 | cmd->t_task_lba = get_unaligned_be64(&cdb[2]); |
706d5860 NB |
3341 | cmd->se_cmd_flags |= SCF_SCSI_CONTROL_SG_IO_CDB; |
3342 | ||
3343 | if (target_check_write_same_discard(&cdb[1], dev) < 0) | |
3344 | goto out_invalid_cdb_field; | |
3345 | break; | |
3346 | case WRITE_SAME: | |
3347 | sectors = transport_get_sectors_10(cdb, cmd, §or_ret); | |
3348 | if (sector_ret) | |
3349 | goto out_unsupported_cdb; | |
3350 | ||
3351 | if (sectors) | |
12850626 | 3352 | size = transport_get_size(1, cdb, cmd); |
706d5860 NB |
3353 | else { |
3354 | pr_err("WSNZ=1, WRITE_SAME w/sectors=0 not supported\n"); | |
3355 | goto out_invalid_cdb_field; | |
c66ac9db | 3356 | } |
706d5860 NB |
3357 | |
3358 | cmd->t_task_lba = get_unaligned_be32(&cdb[2]); | |
c66ac9db | 3359 | cmd->se_cmd_flags |= SCF_SCSI_CONTROL_SG_IO_CDB; |
706d5860 NB |
3360 | /* |
3361 | * Follow sbcr26 with WRITE_SAME (10) and check for the existence | |
3362 | * of byte 1 bit 3 UNMAP instead of original reserved field | |
3363 | */ | |
3364 | if (target_check_write_same_discard(&cdb[1], dev) < 0) | |
3365 | goto out_invalid_cdb_field; | |
c66ac9db NB |
3366 | break; |
3367 | case ALLOW_MEDIUM_REMOVAL: | |
3368 | case GPCMD_CLOSE_TRACK: | |
3369 | case ERASE: | |
3370 | case INITIALIZE_ELEMENT_STATUS: | |
3371 | case GPCMD_LOAD_UNLOAD: | |
3372 | case REZERO_UNIT: | |
3373 | case SEEK_10: | |
3374 | case GPCMD_SET_SPEED: | |
3375 | case SPACE: | |
3376 | case START_STOP: | |
3377 | case TEST_UNIT_READY: | |
3378 | case VERIFY: | |
3379 | case WRITE_FILEMARKS: | |
3380 | case MOVE_MEDIUM: | |
3381 | cmd->se_cmd_flags |= SCF_SCSI_NON_DATA_CDB; | |
3382 | break; | |
3383 | case REPORT_LUNS: | |
3384 | cmd->transport_emulate_cdb = | |
e3d6f909 | 3385 | transport_core_report_lun_response; |
c66ac9db NB |
3386 | size = (cdb[6] << 24) | (cdb[7] << 16) | (cdb[8] << 8) | cdb[9]; |
3387 | /* | |
3388 | * Do implict HEAD_OF_QUEUE processing for REPORT_LUNS | |
3389 | * See spc4r17 section 5.3 | |
3390 | */ | |
5951146d | 3391 | if (cmd->se_dev->dev_task_attr_type == SAM_TASK_ATTR_EMULATED) |
e66ecd50 | 3392 | cmd->sam_task_attr = MSG_HEAD_TAG; |
05d1c7c0 | 3393 | cmd->se_cmd_flags |= SCF_SCSI_CONTROL_SG_IO_CDB; |
c66ac9db NB |
3394 | break; |
3395 | default: | |
6708bb27 | 3396 | pr_warn("TARGET_CORE[%s]: Unsupported SCSI Opcode" |
c66ac9db | 3397 | " 0x%02x, sending CHECK_CONDITION.\n", |
e3d6f909 | 3398 | cmd->se_tfo->get_fabric_name(), cdb[0]); |
c66ac9db NB |
3399 | cmd->transport_wait_for_tasks = &transport_nop_wait_for_tasks; |
3400 | goto out_unsupported_cdb; | |
3401 | } | |
3402 | ||
3403 | if (size != cmd->data_length) { | |
6708bb27 | 3404 | pr_warn("TARGET_CORE[%s]: Expected Transfer Length:" |
c66ac9db | 3405 | " %u does not match SCSI CDB Length: %u for SAM Opcode:" |
e3d6f909 | 3406 | " 0x%02x\n", cmd->se_tfo->get_fabric_name(), |
c66ac9db NB |
3407 | cmd->data_length, size, cdb[0]); |
3408 | ||
3409 | cmd->cmd_spdtl = size; | |
3410 | ||
3411 | if (cmd->data_direction == DMA_TO_DEVICE) { | |
6708bb27 | 3412 | pr_err("Rejecting underflow/overflow" |
c66ac9db NB |
3413 | " WRITE data\n"); |
3414 | goto out_invalid_cdb_field; | |
3415 | } | |
3416 | /* | |
3417 | * Reject READ_* or WRITE_* with overflow/underflow for | |
3418 | * type SCF_SCSI_DATA_SG_IO_CDB. | |
3419 | */ | |
6708bb27 AG |
3420 | if (!ret && (dev->se_sub_dev->se_dev_attrib.block_size != 512)) { |
3421 | pr_err("Failing OVERFLOW/UNDERFLOW for LBA op" | |
c66ac9db | 3422 | " CDB on non 512-byte sector setup subsystem" |
e3d6f909 | 3423 | " plugin: %s\n", dev->transport->name); |
c66ac9db NB |
3424 | /* Returns CHECK_CONDITION + INVALID_CDB_FIELD */ |
3425 | goto out_invalid_cdb_field; | |
3426 | } | |
3427 | ||
3428 | if (size > cmd->data_length) { | |
3429 | cmd->se_cmd_flags |= SCF_OVERFLOW_BIT; | |
3430 | cmd->residual_count = (size - cmd->data_length); | |
3431 | } else { | |
3432 | cmd->se_cmd_flags |= SCF_UNDERFLOW_BIT; | |
3433 | cmd->residual_count = (cmd->data_length - size); | |
3434 | } | |
3435 | cmd->data_length = size; | |
3436 | } | |
3437 | ||
d0229ae3 AG |
3438 | /* Let's limit control cdbs to a page, for simplicity's sake. */ |
3439 | if ((cmd->se_cmd_flags & SCF_SCSI_CONTROL_SG_IO_CDB) && | |
3440 | size > PAGE_SIZE) | |
3441 | goto out_invalid_cdb_field; | |
3442 | ||
c66ac9db NB |
3443 | transport_set_supported_SAM_opcode(cmd); |
3444 | return ret; | |
3445 | ||
3446 | out_unsupported_cdb: | |
3447 | cmd->se_cmd_flags |= SCF_SCSI_CDB_EXCEPTION; | |
3448 | cmd->scsi_sense_reason = TCM_UNSUPPORTED_SCSI_OPCODE; | |
5951146d | 3449 | return -EINVAL; |
c66ac9db NB |
3450 | out_invalid_cdb_field: |
3451 | cmd->se_cmd_flags |= SCF_SCSI_CDB_EXCEPTION; | |
3452 | cmd->scsi_sense_reason = TCM_INVALID_CDB_FIELD; | |
5951146d | 3453 | return -EINVAL; |
c66ac9db NB |
3454 | } |
3455 | ||
c66ac9db NB |
3456 | /* |
3457 | * Called from transport_generic_complete_ok() and | |
3458 | * transport_generic_request_failure() to determine which dormant/delayed | |
3459 | * and ordered cmds need to have their tasks added to the execution queue. | |
3460 | */ | |
3461 | static void transport_complete_task_attr(struct se_cmd *cmd) | |
3462 | { | |
5951146d | 3463 | struct se_device *dev = cmd->se_dev; |
c66ac9db NB |
3464 | struct se_cmd *cmd_p, *cmd_tmp; |
3465 | int new_active_tasks = 0; | |
3466 | ||
e66ecd50 | 3467 | if (cmd->sam_task_attr == MSG_SIMPLE_TAG) { |
c66ac9db NB |
3468 | atomic_dec(&dev->simple_cmds); |
3469 | smp_mb__after_atomic_dec(); | |
3470 | dev->dev_cur_ordered_id++; | |
6708bb27 | 3471 | pr_debug("Incremented dev->dev_cur_ordered_id: %u for" |
c66ac9db NB |
3472 | " SIMPLE: %u\n", dev->dev_cur_ordered_id, |
3473 | cmd->se_ordered_id); | |
e66ecd50 | 3474 | } else if (cmd->sam_task_attr == MSG_HEAD_TAG) { |
c66ac9db NB |
3475 | atomic_dec(&dev->dev_hoq_count); |
3476 | smp_mb__after_atomic_dec(); | |
3477 | dev->dev_cur_ordered_id++; | |
6708bb27 | 3478 | pr_debug("Incremented dev_cur_ordered_id: %u for" |
c66ac9db NB |
3479 | " HEAD_OF_QUEUE: %u\n", dev->dev_cur_ordered_id, |
3480 | cmd->se_ordered_id); | |
e66ecd50 | 3481 | } else if (cmd->sam_task_attr == MSG_ORDERED_TAG) { |
c66ac9db | 3482 | spin_lock(&dev->ordered_cmd_lock); |
5951146d | 3483 | list_del(&cmd->se_ordered_node); |
c66ac9db NB |
3484 | atomic_dec(&dev->dev_ordered_sync); |
3485 | smp_mb__after_atomic_dec(); | |
3486 | spin_unlock(&dev->ordered_cmd_lock); | |
3487 | ||
3488 | dev->dev_cur_ordered_id++; | |
6708bb27 | 3489 | pr_debug("Incremented dev_cur_ordered_id: %u for ORDERED:" |
c66ac9db NB |
3490 | " %u\n", dev->dev_cur_ordered_id, cmd->se_ordered_id); |
3491 | } | |
3492 | /* | |
3493 | * Process all commands up to the last received | |
3494 | * ORDERED task attribute which requires another blocking | |
3495 | * boundary | |
3496 | */ | |
3497 | spin_lock(&dev->delayed_cmd_lock); | |
3498 | list_for_each_entry_safe(cmd_p, cmd_tmp, | |
5951146d | 3499 | &dev->delayed_cmd_list, se_delayed_node) { |
c66ac9db | 3500 | |
5951146d | 3501 | list_del(&cmd_p->se_delayed_node); |
c66ac9db NB |
3502 | spin_unlock(&dev->delayed_cmd_lock); |
3503 | ||
6708bb27 | 3504 | pr_debug("Calling add_tasks() for" |
c66ac9db NB |
3505 | " cmd_p: 0x%02x Task Attr: 0x%02x" |
3506 | " Dormant -> Active, se_ordered_id: %u\n", | |
6708bb27 | 3507 | cmd_p->t_task_cdb[0], |
c66ac9db NB |
3508 | cmd_p->sam_task_attr, cmd_p->se_ordered_id); |
3509 | ||
3510 | transport_add_tasks_from_cmd(cmd_p); | |
3511 | new_active_tasks++; | |
3512 | ||
3513 | spin_lock(&dev->delayed_cmd_lock); | |
e66ecd50 | 3514 | if (cmd_p->sam_task_attr == MSG_ORDERED_TAG) |
c66ac9db NB |
3515 | break; |
3516 | } | |
3517 | spin_unlock(&dev->delayed_cmd_lock); | |
3518 | /* | |
3519 | * If new tasks have become active, wake up the transport thread | |
3520 | * to do the processing of the Active tasks. | |
3521 | */ | |
3522 | if (new_active_tasks != 0) | |
e3d6f909 | 3523 | wake_up_interruptible(&dev->dev_queue_obj.thread_wq); |
c66ac9db NB |
3524 | } |
3525 | ||
07bde79a NB |
3526 | static int transport_complete_qf(struct se_cmd *cmd) |
3527 | { | |
3528 | int ret = 0; | |
3529 | ||
3530 | if (cmd->se_cmd_flags & SCF_TRANSPORT_TASK_SENSE) | |
3531 | return cmd->se_tfo->queue_status(cmd); | |
3532 | ||
3533 | switch (cmd->data_direction) { | |
3534 | case DMA_FROM_DEVICE: | |
3535 | ret = cmd->se_tfo->queue_data_in(cmd); | |
3536 | break; | |
3537 | case DMA_TO_DEVICE: | |
ec98f782 | 3538 | if (cmd->t_bidi_data_sg) { |
07bde79a NB |
3539 | ret = cmd->se_tfo->queue_data_in(cmd); |
3540 | if (ret < 0) | |
3541 | return ret; | |
3542 | } | |
3543 | /* Fall through for DMA_TO_DEVICE */ | |
3544 | case DMA_NONE: | |
3545 | ret = cmd->se_tfo->queue_status(cmd); | |
3546 | break; | |
3547 | default: | |
3548 | break; | |
3549 | } | |
3550 | ||
3551 | return ret; | |
3552 | } | |
3553 | ||
3554 | static void transport_handle_queue_full( | |
3555 | struct se_cmd *cmd, | |
3556 | struct se_device *dev, | |
3557 | int (*qf_callback)(struct se_cmd *)) | |
3558 | { | |
3559 | spin_lock_irq(&dev->qf_cmd_lock); | |
3560 | cmd->se_cmd_flags |= SCF_EMULATE_QUEUE_FULL; | |
3561 | cmd->transport_qf_callback = qf_callback; | |
3562 | list_add_tail(&cmd->se_qf_node, &cmd->se_dev->qf_cmd_list); | |
3563 | atomic_inc(&dev->dev_qf_count); | |
3564 | smp_mb__after_atomic_inc(); | |
3565 | spin_unlock_irq(&cmd->se_dev->qf_cmd_lock); | |
3566 | ||
3567 | schedule_work(&cmd->se_dev->qf_work_queue); | |
3568 | } | |
3569 | ||
c66ac9db NB |
3570 | static void transport_generic_complete_ok(struct se_cmd *cmd) |
3571 | { | |
07bde79a | 3572 | int reason = 0, ret; |
c66ac9db NB |
3573 | /* |
3574 | * Check if we need to move delayed/dormant tasks from cmds on the | |
3575 | * delayed execution list after a HEAD_OF_QUEUE or ORDERED Task | |
3576 | * Attribute. | |
3577 | */ | |
5951146d | 3578 | if (cmd->se_dev->dev_task_attr_type == SAM_TASK_ATTR_EMULATED) |
c66ac9db | 3579 | transport_complete_task_attr(cmd); |
07bde79a NB |
3580 | /* |
3581 | * Check to schedule QUEUE_FULL work, or execute an existing | |
3582 | * cmd->transport_qf_callback() | |
3583 | */ | |
3584 | if (atomic_read(&cmd->se_dev->dev_qf_count) != 0) | |
3585 | schedule_work(&cmd->se_dev->qf_work_queue); | |
3586 | ||
3587 | if (cmd->transport_qf_callback) { | |
3588 | ret = cmd->transport_qf_callback(cmd); | |
3589 | if (ret < 0) | |
3590 | goto queue_full; | |
3591 | ||
3592 | cmd->transport_qf_callback = NULL; | |
3593 | goto done; | |
3594 | } | |
c66ac9db NB |
3595 | /* |
3596 | * Check if we need to retrieve a sense buffer from | |
3597 | * the struct se_cmd in question. | |
3598 | */ | |
3599 | if (cmd->se_cmd_flags & SCF_TRANSPORT_TASK_SENSE) { | |
3600 | if (transport_get_sense_data(cmd) < 0) | |
3601 | reason = TCM_NON_EXISTENT_LUN; | |
3602 | ||
3603 | /* | |
3604 | * Only set when an struct se_task->task_scsi_status returned | |
3605 | * a non GOOD status. | |
3606 | */ | |
3607 | if (cmd->scsi_status) { | |
07bde79a | 3608 | ret = transport_send_check_condition_and_sense( |
c66ac9db | 3609 | cmd, reason, 1); |
07bde79a NB |
3610 | if (ret == -EAGAIN) |
3611 | goto queue_full; | |
3612 | ||
c66ac9db NB |
3613 | transport_lun_remove_cmd(cmd); |
3614 | transport_cmd_check_stop_to_fabric(cmd); | |
3615 | return; | |
3616 | } | |
3617 | } | |
3618 | /* | |
25985edc | 3619 | * Check for a callback, used by amongst other things |
c66ac9db NB |
3620 | * XDWRITE_READ_10 emulation. |
3621 | */ | |
3622 | if (cmd->transport_complete_callback) | |
3623 | cmd->transport_complete_callback(cmd); | |
3624 | ||
3625 | switch (cmd->data_direction) { | |
3626 | case DMA_FROM_DEVICE: | |
3627 | spin_lock(&cmd->se_lun->lun_sep_lock); | |
e3d6f909 AG |
3628 | if (cmd->se_lun->lun_sep) { |
3629 | cmd->se_lun->lun_sep->sep_stats.tx_data_octets += | |
c66ac9db NB |
3630 | cmd->data_length; |
3631 | } | |
3632 | spin_unlock(&cmd->se_lun->lun_sep_lock); | |
c66ac9db | 3633 | |
07bde79a NB |
3634 | ret = cmd->se_tfo->queue_data_in(cmd); |
3635 | if (ret == -EAGAIN) | |
3636 | goto queue_full; | |
c66ac9db NB |
3637 | break; |
3638 | case DMA_TO_DEVICE: | |
3639 | spin_lock(&cmd->se_lun->lun_sep_lock); | |
e3d6f909 AG |
3640 | if (cmd->se_lun->lun_sep) { |
3641 | cmd->se_lun->lun_sep->sep_stats.rx_data_octets += | |
c66ac9db NB |
3642 | cmd->data_length; |
3643 | } | |
3644 | spin_unlock(&cmd->se_lun->lun_sep_lock); | |
3645 | /* | |
3646 | * Check if we need to send READ payload for BIDI-COMMAND | |
3647 | */ | |
ec98f782 | 3648 | if (cmd->t_bidi_data_sg) { |
c66ac9db | 3649 | spin_lock(&cmd->se_lun->lun_sep_lock); |
e3d6f909 AG |
3650 | if (cmd->se_lun->lun_sep) { |
3651 | cmd->se_lun->lun_sep->sep_stats.tx_data_octets += | |
c66ac9db NB |
3652 | cmd->data_length; |
3653 | } | |
3654 | spin_unlock(&cmd->se_lun->lun_sep_lock); | |
07bde79a NB |
3655 | ret = cmd->se_tfo->queue_data_in(cmd); |
3656 | if (ret == -EAGAIN) | |
3657 | goto queue_full; | |
c66ac9db NB |
3658 | break; |
3659 | } | |
3660 | /* Fall through for DMA_TO_DEVICE */ | |
3661 | case DMA_NONE: | |
07bde79a NB |
3662 | ret = cmd->se_tfo->queue_status(cmd); |
3663 | if (ret == -EAGAIN) | |
3664 | goto queue_full; | |
c66ac9db NB |
3665 | break; |
3666 | default: | |
3667 | break; | |
3668 | } | |
3669 | ||
07bde79a | 3670 | done: |
c66ac9db NB |
3671 | transport_lun_remove_cmd(cmd); |
3672 | transport_cmd_check_stop_to_fabric(cmd); | |
07bde79a NB |
3673 | return; |
3674 | ||
3675 | queue_full: | |
6708bb27 | 3676 | pr_debug("Handling complete_ok QUEUE_FULL: se_cmd: %p," |
07bde79a NB |
3677 | " data_direction: %d\n", cmd, cmd->data_direction); |
3678 | transport_handle_queue_full(cmd, cmd->se_dev, transport_complete_qf); | |
c66ac9db NB |
3679 | } |
3680 | ||
3681 | static void transport_free_dev_tasks(struct se_cmd *cmd) | |
3682 | { | |
3683 | struct se_task *task, *task_tmp; | |
3684 | unsigned long flags; | |
3685 | ||
a1d8b49a | 3686 | spin_lock_irqsave(&cmd->t_state_lock, flags); |
c66ac9db | 3687 | list_for_each_entry_safe(task, task_tmp, |
a1d8b49a | 3688 | &cmd->t_task_list, t_list) { |
c66ac9db NB |
3689 | if (atomic_read(&task->task_active)) |
3690 | continue; | |
3691 | ||
3692 | kfree(task->task_sg_bidi); | |
3693 | kfree(task->task_sg); | |
3694 | ||
3695 | list_del(&task->t_list); | |
3696 | ||
a1d8b49a | 3697 | spin_unlock_irqrestore(&cmd->t_state_lock, flags); |
c66ac9db | 3698 | if (task->se_dev) |
e3d6f909 | 3699 | task->se_dev->transport->free_task(task); |
c66ac9db | 3700 | else |
6708bb27 | 3701 | pr_err("task[%u] - task->se_dev is NULL\n", |
c66ac9db | 3702 | task->task_no); |
a1d8b49a | 3703 | spin_lock_irqsave(&cmd->t_state_lock, flags); |
c66ac9db | 3704 | } |
a1d8b49a | 3705 | spin_unlock_irqrestore(&cmd->t_state_lock, flags); |
c66ac9db NB |
3706 | } |
3707 | ||
6708bb27 | 3708 | static inline void transport_free_sgl(struct scatterlist *sgl, int nents) |
c66ac9db | 3709 | { |
ec98f782 | 3710 | struct scatterlist *sg; |
ec98f782 | 3711 | int count; |
c66ac9db | 3712 | |
6708bb27 AG |
3713 | for_each_sg(sgl, sg, nents, count) |
3714 | __free_page(sg_page(sg)); | |
c66ac9db | 3715 | |
6708bb27 AG |
3716 | kfree(sgl); |
3717 | } | |
c66ac9db | 3718 | |
6708bb27 AG |
3719 | static inline void transport_free_pages(struct se_cmd *cmd) |
3720 | { | |
3721 | if (cmd->se_cmd_flags & SCF_PASSTHROUGH_SG_TO_MEM_NOALLOC) | |
3722 | return; | |
3723 | ||
3724 | transport_free_sgl(cmd->t_data_sg, cmd->t_data_nents); | |
ec98f782 AG |
3725 | cmd->t_data_sg = NULL; |
3726 | cmd->t_data_nents = 0; | |
c66ac9db | 3727 | |
6708bb27 | 3728 | transport_free_sgl(cmd->t_bidi_data_sg, cmd->t_bidi_data_nents); |
ec98f782 AG |
3729 | cmd->t_bidi_data_sg = NULL; |
3730 | cmd->t_bidi_data_nents = 0; | |
c66ac9db NB |
3731 | } |
3732 | ||
d3df7825 CH |
3733 | /** |
3734 | * transport_put_cmd - release a reference to a command | |
3735 | * @cmd: command to release | |
3736 | * | |
3737 | * This routine releases our reference to the command and frees it if possible. | |
3738 | */ | |
39c05f32 | 3739 | static void transport_put_cmd(struct se_cmd *cmd) |
c66ac9db NB |
3740 | { |
3741 | unsigned long flags; | |
4911e3cc | 3742 | int free_tasks = 0; |
c66ac9db | 3743 | |
a1d8b49a | 3744 | spin_lock_irqsave(&cmd->t_state_lock, flags); |
4911e3cc CH |
3745 | if (atomic_read(&cmd->t_fe_count)) { |
3746 | if (!atomic_dec_and_test(&cmd->t_fe_count)) | |
3747 | goto out_busy; | |
3748 | } | |
3749 | ||
3750 | if (atomic_read(&cmd->t_se_count)) { | |
3751 | if (!atomic_dec_and_test(&cmd->t_se_count)) | |
3752 | goto out_busy; | |
3753 | } | |
3754 | ||
3755 | if (atomic_read(&cmd->transport_dev_active)) { | |
3756 | atomic_set(&cmd->transport_dev_active, 0); | |
3757 | transport_all_task_dev_remove_state(cmd); | |
3758 | free_tasks = 1; | |
c66ac9db | 3759 | } |
a1d8b49a | 3760 | spin_unlock_irqrestore(&cmd->t_state_lock, flags); |
c66ac9db | 3761 | |
4911e3cc CH |
3762 | if (free_tasks != 0) |
3763 | transport_free_dev_tasks(cmd); | |
d3df7825 | 3764 | |
c66ac9db | 3765 | transport_free_pages(cmd); |
31afc39c | 3766 | transport_release_cmd(cmd); |
39c05f32 | 3767 | return; |
4911e3cc CH |
3768 | out_busy: |
3769 | spin_unlock_irqrestore(&cmd->t_state_lock, flags); | |
c66ac9db NB |
3770 | } |
3771 | ||
c66ac9db | 3772 | /* |
ec98f782 AG |
3773 | * transport_generic_map_mem_to_cmd - Use fabric-alloced pages instead of |
3774 | * allocating in the core. | |
c66ac9db NB |
3775 | * @cmd: Associated se_cmd descriptor |
3776 | * @mem: SGL style memory for TCM WRITE / READ | |
3777 | * @sg_mem_num: Number of SGL elements | |
3778 | * @mem_bidi_in: SGL style memory for TCM BIDI READ | |
3779 | * @sg_mem_bidi_num: Number of BIDI READ SGL elements | |
3780 | * | |
3781 | * Return: nonzero return cmd was rejected for -ENOMEM or inproper usage | |
3782 | * of parameters. | |
3783 | */ | |
3784 | int transport_generic_map_mem_to_cmd( | |
3785 | struct se_cmd *cmd, | |
5951146d AG |
3786 | struct scatterlist *sgl, |
3787 | u32 sgl_count, | |
3788 | struct scatterlist *sgl_bidi, | |
3789 | u32 sgl_bidi_count) | |
c66ac9db | 3790 | { |
5951146d | 3791 | if (!sgl || !sgl_count) |
c66ac9db | 3792 | return 0; |
c66ac9db | 3793 | |
c66ac9db NB |
3794 | if ((cmd->se_cmd_flags & SCF_SCSI_DATA_SG_IO_CDB) || |
3795 | (cmd->se_cmd_flags & SCF_SCSI_CONTROL_SG_IO_CDB)) { | |
c66ac9db | 3796 | |
ec98f782 AG |
3797 | cmd->t_data_sg = sgl; |
3798 | cmd->t_data_nents = sgl_count; | |
c66ac9db | 3799 | |
ec98f782 AG |
3800 | if (sgl_bidi && sgl_bidi_count) { |
3801 | cmd->t_bidi_data_sg = sgl_bidi; | |
3802 | cmd->t_bidi_data_nents = sgl_bidi_count; | |
c66ac9db NB |
3803 | } |
3804 | cmd->se_cmd_flags |= SCF_PASSTHROUGH_SG_TO_MEM_NOALLOC; | |
c66ac9db NB |
3805 | } |
3806 | ||
3807 | return 0; | |
3808 | } | |
3809 | EXPORT_SYMBOL(transport_generic_map_mem_to_cmd); | |
3810 | ||
c66ac9db NB |
3811 | static int transport_new_cmd_obj(struct se_cmd *cmd) |
3812 | { | |
5951146d | 3813 | struct se_device *dev = cmd->se_dev; |
01cde4d5 | 3814 | int set_counts = 1, rc, task_cdbs; |
c66ac9db | 3815 | |
ec98f782 AG |
3816 | /* |
3817 | * Setup any BIDI READ tasks and memory from | |
3818 | * cmd->t_mem_bidi_list so the READ struct se_tasks | |
3819 | * are queued first for the non pSCSI passthrough case. | |
3820 | */ | |
3821 | if (cmd->t_bidi_data_sg && | |
3822 | (dev->transport->transport_type != TRANSPORT_PLUGIN_PHBA_PDEV)) { | |
3823 | rc = transport_allocate_tasks(cmd, | |
3824 | cmd->t_task_lba, | |
3825 | DMA_FROM_DEVICE, | |
3826 | cmd->t_bidi_data_sg, | |
3827 | cmd->t_bidi_data_nents); | |
6708bb27 | 3828 | if (rc <= 0) { |
c66ac9db NB |
3829 | cmd->se_cmd_flags |= SCF_SCSI_CDB_EXCEPTION; |
3830 | cmd->scsi_sense_reason = | |
ec98f782 | 3831 | TCM_LOGICAL_UNIT_COMMUNICATION_FAILURE; |
01cde4d5 | 3832 | return -EINVAL; |
c66ac9db | 3833 | } |
ec98f782 AG |
3834 | atomic_inc(&cmd->t_fe_count); |
3835 | atomic_inc(&cmd->t_se_count); | |
3836 | set_counts = 0; | |
3837 | } | |
3838 | /* | |
3839 | * Setup the tasks and memory from cmd->t_mem_list | |
3840 | * Note for BIDI transfers this will contain the WRITE payload | |
3841 | */ | |
3842 | task_cdbs = transport_allocate_tasks(cmd, | |
3843 | cmd->t_task_lba, | |
3844 | cmd->data_direction, | |
3845 | cmd->t_data_sg, | |
3846 | cmd->t_data_nents); | |
6708bb27 | 3847 | if (task_cdbs <= 0) { |
ec98f782 AG |
3848 | cmd->se_cmd_flags |= SCF_SCSI_CDB_EXCEPTION; |
3849 | cmd->scsi_sense_reason = | |
3850 | TCM_LOGICAL_UNIT_COMMUNICATION_FAILURE; | |
01cde4d5 | 3851 | return -EINVAL; |
ec98f782 | 3852 | } |
c66ac9db | 3853 | |
ec98f782 AG |
3854 | if (set_counts) { |
3855 | atomic_inc(&cmd->t_fe_count); | |
3856 | atomic_inc(&cmd->t_se_count); | |
c66ac9db NB |
3857 | } |
3858 | ||
ec98f782 AG |
3859 | cmd->t_task_list_num = task_cdbs; |
3860 | ||
a1d8b49a AG |
3861 | atomic_set(&cmd->t_task_cdbs_left, task_cdbs); |
3862 | atomic_set(&cmd->t_task_cdbs_ex_left, task_cdbs); | |
3863 | atomic_set(&cmd->t_task_cdbs_timeout_left, task_cdbs); | |
c66ac9db NB |
3864 | return 0; |
3865 | } | |
3866 | ||
05d1c7c0 AG |
3867 | void *transport_kmap_first_data_page(struct se_cmd *cmd) |
3868 | { | |
ec98f782 | 3869 | struct scatterlist *sg = cmd->t_data_sg; |
05d1c7c0 | 3870 | |
ec98f782 | 3871 | BUG_ON(!sg); |
05d1c7c0 | 3872 | /* |
ec98f782 AG |
3873 | * We need to take into account a possible offset here for fabrics like |
3874 | * tcm_loop who may be using a contig buffer from the SCSI midlayer for | |
3875 | * control CDBs passed as SGLs via transport_generic_map_mem_to_cmd() | |
05d1c7c0 | 3876 | */ |
ec98f782 | 3877 | return kmap(sg_page(sg)) + sg->offset; |
05d1c7c0 AG |
3878 | } |
3879 | EXPORT_SYMBOL(transport_kmap_first_data_page); | |
3880 | ||
3881 | void transport_kunmap_first_data_page(struct se_cmd *cmd) | |
3882 | { | |
ec98f782 | 3883 | kunmap(sg_page(cmd->t_data_sg)); |
05d1c7c0 AG |
3884 | } |
3885 | EXPORT_SYMBOL(transport_kunmap_first_data_page); | |
3886 | ||
c66ac9db | 3887 | static int |
05d1c7c0 | 3888 | transport_generic_get_mem(struct se_cmd *cmd) |
c66ac9db | 3889 | { |
ec98f782 AG |
3890 | u32 length = cmd->data_length; |
3891 | unsigned int nents; | |
3892 | struct page *page; | |
3893 | int i = 0; | |
c66ac9db | 3894 | |
ec98f782 AG |
3895 | nents = DIV_ROUND_UP(length, PAGE_SIZE); |
3896 | cmd->t_data_sg = kmalloc(sizeof(struct scatterlist) * nents, GFP_KERNEL); | |
3897 | if (!cmd->t_data_sg) | |
3898 | return -ENOMEM; | |
c66ac9db | 3899 | |
ec98f782 AG |
3900 | cmd->t_data_nents = nents; |
3901 | sg_init_table(cmd->t_data_sg, nents); | |
c66ac9db | 3902 | |
ec98f782 AG |
3903 | while (length) { |
3904 | u32 page_len = min_t(u32, length, PAGE_SIZE); | |
3905 | page = alloc_page(GFP_KERNEL | __GFP_ZERO); | |
3906 | if (!page) | |
3907 | goto out; | |
c66ac9db | 3908 | |
ec98f782 AG |
3909 | sg_set_page(&cmd->t_data_sg[i], page, page_len, 0); |
3910 | length -= page_len; | |
3911 | i++; | |
c66ac9db | 3912 | } |
c66ac9db | 3913 | return 0; |
c66ac9db | 3914 | |
ec98f782 AG |
3915 | out: |
3916 | while (i >= 0) { | |
3917 | __free_page(sg_page(&cmd->t_data_sg[i])); | |
3918 | i--; | |
c66ac9db | 3919 | } |
ec98f782 AG |
3920 | kfree(cmd->t_data_sg); |
3921 | cmd->t_data_sg = NULL; | |
3922 | return -ENOMEM; | |
c66ac9db NB |
3923 | } |
3924 | ||
a1d8b49a AG |
3925 | /* Reduce sectors if they are too long for the device */ |
3926 | static inline sector_t transport_limit_task_sectors( | |
c66ac9db NB |
3927 | struct se_device *dev, |
3928 | unsigned long long lba, | |
a1d8b49a | 3929 | sector_t sectors) |
c66ac9db | 3930 | { |
a1d8b49a | 3931 | sectors = min_t(sector_t, sectors, dev->se_sub_dev->se_dev_attrib.max_sectors); |
c66ac9db | 3932 | |
a1d8b49a AG |
3933 | if (dev->transport->get_device_type(dev) == TYPE_DISK) |
3934 | if ((lba + sectors) > transport_dev_end_lba(dev)) | |
3935 | sectors = ((transport_dev_end_lba(dev) - lba) + 1); | |
c66ac9db | 3936 | |
a1d8b49a | 3937 | return sectors; |
c66ac9db NB |
3938 | } |
3939 | ||
c66ac9db NB |
3940 | |
3941 | /* | |
3942 | * This function can be used by HW target mode drivers to create a linked | |
3943 | * scatterlist from all contiguously allocated struct se_task->task_sg[]. | |
3944 | * This is intended to be called during the completion path by TCM Core | |
3945 | * when struct target_core_fabric_ops->check_task_sg_chaining is enabled. | |
3946 | */ | |
3947 | void transport_do_task_sg_chain(struct se_cmd *cmd) | |
3948 | { | |
ec98f782 AG |
3949 | struct scatterlist *sg_first = NULL; |
3950 | struct scatterlist *sg_prev = NULL; | |
3951 | int sg_prev_nents = 0; | |
3952 | struct scatterlist *sg; | |
c66ac9db | 3953 | struct se_task *task; |
ec98f782 | 3954 | u32 chained_nents = 0; |
c66ac9db NB |
3955 | int i; |
3956 | ||
ec98f782 AG |
3957 | BUG_ON(!cmd->se_tfo->task_sg_chaining); |
3958 | ||
c66ac9db NB |
3959 | /* |
3960 | * Walk the struct se_task list and setup scatterlist chains | |
a1d8b49a | 3961 | * for each contiguously allocated struct se_task->task_sg[]. |
c66ac9db | 3962 | */ |
a1d8b49a | 3963 | list_for_each_entry(task, &cmd->t_task_list, t_list) { |
ec98f782 | 3964 | if (!task->task_sg) |
c66ac9db NB |
3965 | continue; |
3966 | ||
ec98f782 AG |
3967 | if (!sg_first) { |
3968 | sg_first = task->task_sg; | |
6708bb27 | 3969 | chained_nents = task->task_sg_nents; |
97868c89 | 3970 | } else { |
ec98f782 | 3971 | sg_chain(sg_prev, sg_prev_nents, task->task_sg); |
6708bb27 | 3972 | chained_nents += task->task_sg_nents; |
97868c89 | 3973 | } |
c3c74c7a NB |
3974 | /* |
3975 | * For the padded tasks, use the extra SGL vector allocated | |
3976 | * in transport_allocate_data_tasks() for the sg_prev_nents | |
3977 | * offset into sg_chain() above.. The last task of a | |
3978 | * multi-task list, or a single task will not have | |
3979 | * task->task_sg_padded set.. | |
3980 | */ | |
3981 | if (task->task_padded_sg) | |
3982 | sg_prev_nents = (task->task_sg_nents + 1); | |
3983 | else | |
3984 | sg_prev_nents = task->task_sg_nents; | |
ec98f782 AG |
3985 | |
3986 | sg_prev = task->task_sg; | |
c66ac9db NB |
3987 | } |
3988 | /* | |
3989 | * Setup the starting pointer and total t_tasks_sg_linked_no including | |
3990 | * padding SGs for linking and to mark the end. | |
3991 | */ | |
a1d8b49a | 3992 | cmd->t_tasks_sg_chained = sg_first; |
ec98f782 | 3993 | cmd->t_tasks_sg_chained_no = chained_nents; |
c66ac9db | 3994 | |
6708bb27 | 3995 | pr_debug("Setup cmd: %p cmd->t_tasks_sg_chained: %p and" |
a1d8b49a AG |
3996 | " t_tasks_sg_chained_no: %u\n", cmd, cmd->t_tasks_sg_chained, |
3997 | cmd->t_tasks_sg_chained_no); | |
c66ac9db | 3998 | |
a1d8b49a AG |
3999 | for_each_sg(cmd->t_tasks_sg_chained, sg, |
4000 | cmd->t_tasks_sg_chained_no, i) { | |
c66ac9db | 4001 | |
6708bb27 | 4002 | pr_debug("SG[%d]: %p page: %p length: %d offset: %d\n", |
5951146d | 4003 | i, sg, sg_page(sg), sg->length, sg->offset); |
c66ac9db | 4004 | if (sg_is_chain(sg)) |
6708bb27 | 4005 | pr_debug("SG: %p sg_is_chain=1\n", sg); |
c66ac9db | 4006 | if (sg_is_last(sg)) |
6708bb27 | 4007 | pr_debug("SG: %p sg_is_last=1\n", sg); |
c66ac9db | 4008 | } |
c66ac9db NB |
4009 | } |
4010 | EXPORT_SYMBOL(transport_do_task_sg_chain); | |
4011 | ||
a1d8b49a AG |
4012 | /* |
4013 | * Break up cmd into chunks transport can handle | |
4014 | */ | |
ec98f782 | 4015 | static int transport_allocate_data_tasks( |
c66ac9db NB |
4016 | struct se_cmd *cmd, |
4017 | unsigned long long lba, | |
c66ac9db | 4018 | enum dma_data_direction data_direction, |
ec98f782 AG |
4019 | struct scatterlist *sgl, |
4020 | unsigned int sgl_nents) | |
c66ac9db NB |
4021 | { |
4022 | unsigned char *cdb = NULL; | |
4023 | struct se_task *task; | |
5951146d | 4024 | struct se_device *dev = cmd->se_dev; |
ec98f782 | 4025 | unsigned long flags; |
a3eedc22 | 4026 | int task_count, i; |
277c5f27 | 4027 | sector_t sectors, dev_max_sectors = dev->se_sub_dev->se_dev_attrib.max_sectors; |
ec98f782 AG |
4028 | u32 sector_size = dev->se_sub_dev->se_dev_attrib.block_size; |
4029 | struct scatterlist *sg; | |
4030 | struct scatterlist *cmd_sg; | |
a1d8b49a | 4031 | |
ec98f782 AG |
4032 | WARN_ON(cmd->data_length % sector_size); |
4033 | sectors = DIV_ROUND_UP(cmd->data_length, sector_size); | |
277c5f27 NB |
4034 | task_count = DIV_ROUND_UP_SECTOR_T(sectors, dev_max_sectors); |
4035 | ||
ec98f782 AG |
4036 | cmd_sg = sgl; |
4037 | for (i = 0; i < task_count; i++) { | |
c3c74c7a | 4038 | unsigned int task_size, task_sg_nents_padded; |
ec98f782 | 4039 | int count; |
a1d8b49a | 4040 | |
c66ac9db | 4041 | task = transport_generic_get_task(cmd, data_direction); |
a1d8b49a | 4042 | if (!task) |
ec98f782 | 4043 | return -ENOMEM; |
c66ac9db | 4044 | |
c66ac9db | 4045 | task->task_lba = lba; |
ec98f782 AG |
4046 | task->task_sectors = min(sectors, dev_max_sectors); |
4047 | task->task_size = task->task_sectors * sector_size; | |
c66ac9db | 4048 | |
e3d6f909 | 4049 | cdb = dev->transport->get_cdb(task); |
a1d8b49a AG |
4050 | BUG_ON(!cdb); |
4051 | ||
4052 | memcpy(cdb, cmd->t_task_cdb, | |
4053 | scsi_command_size(cmd->t_task_cdb)); | |
4054 | ||
4055 | /* Update new cdb with updated lba/sectors */ | |
3a867205 | 4056 | cmd->transport_split_cdb(task->task_lba, task->task_sectors, cdb); |
525a48a2 NB |
4057 | /* |
4058 | * This now assumes that passed sg_ents are in PAGE_SIZE chunks | |
4059 | * in order to calculate the number per task SGL entries | |
4060 | */ | |
4061 | task->task_sg_nents = DIV_ROUND_UP(task->task_size, PAGE_SIZE); | |
c66ac9db | 4062 | /* |
ec98f782 AG |
4063 | * Check if the fabric module driver is requesting that all |
4064 | * struct se_task->task_sg[] be chained together.. If so, | |
4065 | * then allocate an extra padding SG entry for linking and | |
c3c74c7a NB |
4066 | * marking the end of the chained SGL for every task except |
4067 | * the last one for (task_count > 1) operation, or skipping | |
4068 | * the extra padding for the (task_count == 1) case. | |
c66ac9db | 4069 | */ |
c3c74c7a NB |
4070 | if (cmd->se_tfo->task_sg_chaining && (i < (task_count - 1))) { |
4071 | task_sg_nents_padded = (task->task_sg_nents + 1); | |
ec98f782 | 4072 | task->task_padded_sg = 1; |
c3c74c7a NB |
4073 | } else |
4074 | task_sg_nents_padded = task->task_sg_nents; | |
c66ac9db | 4075 | |
1d20bb61 | 4076 | task->task_sg = kmalloc(sizeof(struct scatterlist) * |
c3c74c7a | 4077 | task_sg_nents_padded, GFP_KERNEL); |
ec98f782 AG |
4078 | if (!task->task_sg) { |
4079 | cmd->se_dev->transport->free_task(task); | |
4080 | return -ENOMEM; | |
4081 | } | |
4082 | ||
c3c74c7a | 4083 | sg_init_table(task->task_sg, task_sg_nents_padded); |
c66ac9db | 4084 | |
ec98f782 AG |
4085 | task_size = task->task_size; |
4086 | ||
4087 | /* Build new sgl, only up to task_size */ | |
6708bb27 | 4088 | for_each_sg(task->task_sg, sg, task->task_sg_nents, count) { |
ec98f782 AG |
4089 | if (cmd_sg->length > task_size) |
4090 | break; | |
4091 | ||
4092 | *sg = *cmd_sg; | |
4093 | task_size -= cmd_sg->length; | |
4094 | cmd_sg = sg_next(cmd_sg); | |
c66ac9db | 4095 | } |
c66ac9db | 4096 | |
ec98f782 AG |
4097 | lba += task->task_sectors; |
4098 | sectors -= task->task_sectors; | |
c66ac9db | 4099 | |
ec98f782 AG |
4100 | spin_lock_irqsave(&cmd->t_state_lock, flags); |
4101 | list_add_tail(&task->t_list, &cmd->t_task_list); | |
4102 | spin_unlock_irqrestore(&cmd->t_state_lock, flags); | |
c66ac9db NB |
4103 | } |
4104 | ||
ec98f782 | 4105 | return task_count; |
c66ac9db NB |
4106 | } |
4107 | ||
4108 | static int | |
ec98f782 | 4109 | transport_allocate_control_task(struct se_cmd *cmd) |
c66ac9db | 4110 | { |
5951146d | 4111 | struct se_device *dev = cmd->se_dev; |
c66ac9db NB |
4112 | unsigned char *cdb; |
4113 | struct se_task *task; | |
ec98f782 | 4114 | unsigned long flags; |
c66ac9db NB |
4115 | |
4116 | task = transport_generic_get_task(cmd, cmd->data_direction); | |
4117 | if (!task) | |
ec98f782 | 4118 | return -ENOMEM; |
c66ac9db | 4119 | |
e3d6f909 | 4120 | cdb = dev->transport->get_cdb(task); |
a1d8b49a AG |
4121 | BUG_ON(!cdb); |
4122 | memcpy(cdb, cmd->t_task_cdb, | |
4123 | scsi_command_size(cmd->t_task_cdb)); | |
c66ac9db | 4124 | |
ec98f782 AG |
4125 | task->task_sg = kmalloc(sizeof(struct scatterlist) * cmd->t_data_nents, |
4126 | GFP_KERNEL); | |
4127 | if (!task->task_sg) { | |
4128 | cmd->se_dev->transport->free_task(task); | |
4129 | return -ENOMEM; | |
4130 | } | |
4131 | ||
4132 | memcpy(task->task_sg, cmd->t_data_sg, | |
4133 | sizeof(struct scatterlist) * cmd->t_data_nents); | |
c66ac9db | 4134 | task->task_size = cmd->data_length; |
6708bb27 | 4135 | task->task_sg_nents = cmd->t_data_nents; |
c66ac9db | 4136 | |
ec98f782 AG |
4137 | spin_lock_irqsave(&cmd->t_state_lock, flags); |
4138 | list_add_tail(&task->t_list, &cmd->t_task_list); | |
4139 | spin_unlock_irqrestore(&cmd->t_state_lock, flags); | |
c66ac9db | 4140 | |
6708bb27 | 4141 | /* Success! Return number of tasks allocated */ |
a3eedc22 | 4142 | return 1; |
ec98f782 AG |
4143 | } |
4144 | ||
4145 | static u32 transport_allocate_tasks( | |
4146 | struct se_cmd *cmd, | |
4147 | unsigned long long lba, | |
4148 | enum dma_data_direction data_direction, | |
4149 | struct scatterlist *sgl, | |
4150 | unsigned int sgl_nents) | |
4151 | { | |
01cde4d5 NB |
4152 | if (cmd->se_cmd_flags & SCF_SCSI_DATA_SG_IO_CDB) { |
4153 | if (transport_cmd_get_valid_sectors(cmd) < 0) | |
4154 | return -EINVAL; | |
4155 | ||
ec98f782 AG |
4156 | return transport_allocate_data_tasks(cmd, lba, data_direction, |
4157 | sgl, sgl_nents); | |
01cde4d5 | 4158 | } else |
6708bb27 AG |
4159 | return transport_allocate_control_task(cmd); |
4160 | ||
c66ac9db NB |
4161 | } |
4162 | ||
ec98f782 | 4163 | |
c66ac9db NB |
4164 | /* transport_generic_new_cmd(): Called from transport_processing_thread() |
4165 | * | |
4166 | * Allocate storage transport resources from a set of values predefined | |
4167 | * by transport_generic_cmd_sequencer() from the iSCSI Target RX process. | |
4168 | * Any non zero return here is treated as an "out of resource' op here. | |
4169 | */ | |
4170 | /* | |
4171 | * Generate struct se_task(s) and/or their payloads for this CDB. | |
4172 | */ | |
a1d8b49a | 4173 | int transport_generic_new_cmd(struct se_cmd *cmd) |
c66ac9db | 4174 | { |
c66ac9db NB |
4175 | int ret = 0; |
4176 | ||
4177 | /* | |
4178 | * Determine is the TCM fabric module has already allocated physical | |
4179 | * memory, and is directly calling transport_generic_map_mem_to_cmd() | |
ec98f782 | 4180 | * beforehand. |
c66ac9db | 4181 | */ |
ec98f782 AG |
4182 | if (!(cmd->se_cmd_flags & SCF_PASSTHROUGH_SG_TO_MEM_NOALLOC) && |
4183 | cmd->data_length) { | |
05d1c7c0 | 4184 | ret = transport_generic_get_mem(cmd); |
c66ac9db NB |
4185 | if (ret < 0) |
4186 | return ret; | |
4187 | } | |
1d20bb61 NB |
4188 | /* |
4189 | * Call transport_new_cmd_obj() to invoke transport_allocate_tasks() for | |
4190 | * control or data CDB types, and perform the map to backend subsystem | |
4191 | * code from SGL memory allocated here by transport_generic_get_mem(), or | |
4192 | * via pre-existing SGL memory setup explictly by fabric module code with | |
4193 | * transport_generic_map_mem_to_cmd(). | |
4194 | */ | |
c66ac9db NB |
4195 | ret = transport_new_cmd_obj(cmd); |
4196 | if (ret < 0) | |
4197 | return ret; | |
c66ac9db | 4198 | /* |
a1d8b49a | 4199 | * For WRITEs, let the fabric know its buffer is ready.. |
c66ac9db NB |
4200 | * This WRITE struct se_cmd (and all of its associated struct se_task's) |
4201 | * will be added to the struct se_device execution queue after its WRITE | |
4202 | * data has arrived. (ie: It gets handled by the transport processing | |
4203 | * thread a second time) | |
4204 | */ | |
4205 | if (cmd->data_direction == DMA_TO_DEVICE) { | |
4206 | transport_add_tasks_to_state_queue(cmd); | |
4207 | return transport_generic_write_pending(cmd); | |
4208 | } | |
4209 | /* | |
4210 | * Everything else but a WRITE, add the struct se_cmd's struct se_task's | |
4211 | * to the execution queue. | |
4212 | */ | |
4213 | transport_execute_tasks(cmd); | |
4214 | return 0; | |
4215 | } | |
a1d8b49a | 4216 | EXPORT_SYMBOL(transport_generic_new_cmd); |
c66ac9db NB |
4217 | |
4218 | /* transport_generic_process_write(): | |
4219 | * | |
4220 | * | |
4221 | */ | |
4222 | void transport_generic_process_write(struct se_cmd *cmd) | |
4223 | { | |
c66ac9db NB |
4224 | transport_execute_tasks(cmd); |
4225 | } | |
4226 | EXPORT_SYMBOL(transport_generic_process_write); | |
4227 | ||
07bde79a NB |
4228 | static int transport_write_pending_qf(struct se_cmd *cmd) |
4229 | { | |
4230 | return cmd->se_tfo->write_pending(cmd); | |
4231 | } | |
4232 | ||
c66ac9db NB |
4233 | /* transport_generic_write_pending(): |
4234 | * | |
4235 | * | |
4236 | */ | |
4237 | static int transport_generic_write_pending(struct se_cmd *cmd) | |
4238 | { | |
4239 | unsigned long flags; | |
4240 | int ret; | |
4241 | ||
a1d8b49a | 4242 | spin_lock_irqsave(&cmd->t_state_lock, flags); |
c66ac9db | 4243 | cmd->t_state = TRANSPORT_WRITE_PENDING; |
a1d8b49a | 4244 | spin_unlock_irqrestore(&cmd->t_state_lock, flags); |
07bde79a NB |
4245 | |
4246 | if (cmd->transport_qf_callback) { | |
4247 | ret = cmd->transport_qf_callback(cmd); | |
4248 | if (ret == -EAGAIN) | |
4249 | goto queue_full; | |
4250 | else if (ret < 0) | |
4251 | return ret; | |
4252 | ||
4253 | cmd->transport_qf_callback = NULL; | |
4254 | return 0; | |
4255 | } | |
05d1c7c0 | 4256 | |
c66ac9db NB |
4257 | /* |
4258 | * Clear the se_cmd for WRITE_PENDING status in order to set | |
a1d8b49a | 4259 | * cmd->t_transport_active=0 so that transport_generic_handle_data |
c66ac9db | 4260 | * can be called from HW target mode interrupt code. This is safe |
e3d6f909 | 4261 | * to be called with transport_off=1 before the cmd->se_tfo->write_pending |
c66ac9db NB |
4262 | * because the se_cmd->se_lun pointer is not being cleared. |
4263 | */ | |
4264 | transport_cmd_check_stop(cmd, 1, 0); | |
4265 | ||
4266 | /* | |
4267 | * Call the fabric write_pending function here to let the | |
4268 | * frontend know that WRITE buffers are ready. | |
4269 | */ | |
e3d6f909 | 4270 | ret = cmd->se_tfo->write_pending(cmd); |
07bde79a NB |
4271 | if (ret == -EAGAIN) |
4272 | goto queue_full; | |
4273 | else if (ret < 0) | |
c66ac9db NB |
4274 | return ret; |
4275 | ||
4276 | return PYX_TRANSPORT_WRITE_PENDING; | |
07bde79a NB |
4277 | |
4278 | queue_full: | |
6708bb27 | 4279 | pr_debug("Handling write_pending QUEUE__FULL: se_cmd: %p\n", cmd); |
07bde79a NB |
4280 | cmd->t_state = TRANSPORT_COMPLETE_QF_WP; |
4281 | transport_handle_queue_full(cmd, cmd->se_dev, | |
4282 | transport_write_pending_qf); | |
4283 | return ret; | |
c66ac9db NB |
4284 | } |
4285 | ||
2dbc43d2 CH |
4286 | /** |
4287 | * transport_release_cmd - free a command | |
4288 | * @cmd: command to free | |
4289 | * | |
4290 | * This routine unconditionally frees a command, and reference counting | |
4291 | * or list removal must be done in the caller. | |
4292 | */ | |
35462975 | 4293 | void transport_release_cmd(struct se_cmd *cmd) |
c66ac9db | 4294 | { |
e3d6f909 | 4295 | BUG_ON(!cmd->se_tfo); |
c66ac9db | 4296 | |
2dbc43d2 CH |
4297 | if (cmd->se_tmr_req) |
4298 | core_tmr_release_req(cmd->se_tmr_req); | |
4299 | if (cmd->t_task_cdb != cmd->__t_task_cdb) | |
4300 | kfree(cmd->t_task_cdb); | |
35462975 | 4301 | cmd->se_tfo->release_cmd(cmd); |
c66ac9db | 4302 | } |
35462975 | 4303 | EXPORT_SYMBOL(transport_release_cmd); |
c66ac9db | 4304 | |
39c05f32 | 4305 | void transport_generic_free_cmd(struct se_cmd *cmd, int wait_for_tasks) |
c66ac9db | 4306 | { |
5951146d | 4307 | if (!(cmd->se_cmd_flags & SCF_SE_LUN_CMD)) |
35462975 | 4308 | transport_release_cmd(cmd); |
c66ac9db NB |
4309 | else { |
4310 | core_dec_lacl_count(cmd->se_sess->se_node_acl, cmd); | |
4311 | ||
82f1c8a4 | 4312 | if (cmd->se_lun) |
c66ac9db | 4313 | transport_lun_remove_cmd(cmd); |
c66ac9db NB |
4314 | |
4315 | if (wait_for_tasks && cmd->transport_wait_for_tasks) | |
39c05f32 | 4316 | cmd->transport_wait_for_tasks(cmd, 0); |
c66ac9db | 4317 | |
f4366772 NB |
4318 | transport_free_dev_tasks(cmd); |
4319 | ||
39c05f32 | 4320 | transport_put_cmd(cmd); |
c66ac9db NB |
4321 | } |
4322 | } | |
4323 | EXPORT_SYMBOL(transport_generic_free_cmd); | |
4324 | ||
4325 | static void transport_nop_wait_for_tasks( | |
4326 | struct se_cmd *cmd, | |
39c05f32 | 4327 | int remove_cmd) |
c66ac9db NB |
4328 | { |
4329 | return; | |
4330 | } | |
4331 | ||
4332 | /* transport_lun_wait_for_tasks(): | |
4333 | * | |
4334 | * Called from ConfigFS context to stop the passed struct se_cmd to allow | |
4335 | * an struct se_lun to be successfully shutdown. | |
4336 | */ | |
4337 | static int transport_lun_wait_for_tasks(struct se_cmd *cmd, struct se_lun *lun) | |
4338 | { | |
4339 | unsigned long flags; | |
4340 | int ret; | |
4341 | /* | |
4342 | * If the frontend has already requested this struct se_cmd to | |
4343 | * be stopped, we can safely ignore this struct se_cmd. | |
4344 | */ | |
a1d8b49a AG |
4345 | spin_lock_irqsave(&cmd->t_state_lock, flags); |
4346 | if (atomic_read(&cmd->t_transport_stop)) { | |
4347 | atomic_set(&cmd->transport_lun_stop, 0); | |
6708bb27 | 4348 | pr_debug("ConfigFS ITT[0x%08x] - t_transport_stop ==" |
e3d6f909 | 4349 | " TRUE, skipping\n", cmd->se_tfo->get_task_tag(cmd)); |
a1d8b49a | 4350 | spin_unlock_irqrestore(&cmd->t_state_lock, flags); |
c66ac9db | 4351 | transport_cmd_check_stop(cmd, 1, 0); |
e3d6f909 | 4352 | return -EPERM; |
c66ac9db | 4353 | } |
a1d8b49a AG |
4354 | atomic_set(&cmd->transport_lun_fe_stop, 1); |
4355 | spin_unlock_irqrestore(&cmd->t_state_lock, flags); | |
c66ac9db | 4356 | |
5951146d | 4357 | wake_up_interruptible(&cmd->se_dev->dev_queue_obj.thread_wq); |
c66ac9db NB |
4358 | |
4359 | ret = transport_stop_tasks_for_cmd(cmd); | |
4360 | ||
6708bb27 AG |
4361 | pr_debug("ConfigFS: cmd: %p t_tasks: %d stop tasks ret:" |
4362 | " %d\n", cmd, cmd->t_task_list_num, ret); | |
c66ac9db | 4363 | if (!ret) { |
6708bb27 | 4364 | pr_debug("ConfigFS: ITT[0x%08x] - stopping cmd....\n", |
e3d6f909 | 4365 | cmd->se_tfo->get_task_tag(cmd)); |
a1d8b49a | 4366 | wait_for_completion(&cmd->transport_lun_stop_comp); |
6708bb27 | 4367 | pr_debug("ConfigFS: ITT[0x%08x] - stopped cmd....\n", |
e3d6f909 | 4368 | cmd->se_tfo->get_task_tag(cmd)); |
c66ac9db | 4369 | } |
5951146d | 4370 | transport_remove_cmd_from_queue(cmd, &cmd->se_dev->dev_queue_obj); |
c66ac9db NB |
4371 | |
4372 | return 0; | |
4373 | } | |
4374 | ||
c66ac9db NB |
4375 | static void __transport_clear_lun_from_sessions(struct se_lun *lun) |
4376 | { | |
4377 | struct se_cmd *cmd = NULL; | |
4378 | unsigned long lun_flags, cmd_flags; | |
4379 | /* | |
4380 | * Do exception processing and return CHECK_CONDITION status to the | |
4381 | * Initiator Port. | |
4382 | */ | |
4383 | spin_lock_irqsave(&lun->lun_cmd_lock, lun_flags); | |
5951146d AG |
4384 | while (!list_empty(&lun->lun_cmd_list)) { |
4385 | cmd = list_first_entry(&lun->lun_cmd_list, | |
4386 | struct se_cmd, se_lun_node); | |
4387 | list_del(&cmd->se_lun_node); | |
4388 | ||
a1d8b49a | 4389 | atomic_set(&cmd->transport_lun_active, 0); |
c66ac9db NB |
4390 | /* |
4391 | * This will notify iscsi_target_transport.c: | |
4392 | * transport_cmd_check_stop() that a LUN shutdown is in | |
4393 | * progress for the iscsi_cmd_t. | |
4394 | */ | |
a1d8b49a | 4395 | spin_lock(&cmd->t_state_lock); |
6708bb27 | 4396 | pr_debug("SE_LUN[%d] - Setting cmd->transport" |
c66ac9db | 4397 | "_lun_stop for ITT: 0x%08x\n", |
e3d6f909 AG |
4398 | cmd->se_lun->unpacked_lun, |
4399 | cmd->se_tfo->get_task_tag(cmd)); | |
a1d8b49a AG |
4400 | atomic_set(&cmd->transport_lun_stop, 1); |
4401 | spin_unlock(&cmd->t_state_lock); | |
c66ac9db NB |
4402 | |
4403 | spin_unlock_irqrestore(&lun->lun_cmd_lock, lun_flags); | |
4404 | ||
6708bb27 AG |
4405 | if (!cmd->se_lun) { |
4406 | pr_err("ITT: 0x%08x, [i,t]_state: %u/%u\n", | |
e3d6f909 AG |
4407 | cmd->se_tfo->get_task_tag(cmd), |
4408 | cmd->se_tfo->get_cmd_state(cmd), cmd->t_state); | |
c66ac9db NB |
4409 | BUG(); |
4410 | } | |
4411 | /* | |
4412 | * If the Storage engine still owns the iscsi_cmd_t, determine | |
4413 | * and/or stop its context. | |
4414 | */ | |
6708bb27 | 4415 | pr_debug("SE_LUN[%d] - ITT: 0x%08x before transport" |
e3d6f909 AG |
4416 | "_lun_wait_for_tasks()\n", cmd->se_lun->unpacked_lun, |
4417 | cmd->se_tfo->get_task_tag(cmd)); | |
c66ac9db | 4418 | |
e3d6f909 | 4419 | if (transport_lun_wait_for_tasks(cmd, cmd->se_lun) < 0) { |
c66ac9db NB |
4420 | spin_lock_irqsave(&lun->lun_cmd_lock, lun_flags); |
4421 | continue; | |
4422 | } | |
4423 | ||
6708bb27 | 4424 | pr_debug("SE_LUN[%d] - ITT: 0x%08x after transport_lun" |
c66ac9db | 4425 | "_wait_for_tasks(): SUCCESS\n", |
e3d6f909 AG |
4426 | cmd->se_lun->unpacked_lun, |
4427 | cmd->se_tfo->get_task_tag(cmd)); | |
c66ac9db | 4428 | |
a1d8b49a | 4429 | spin_lock_irqsave(&cmd->t_state_lock, cmd_flags); |
6708bb27 | 4430 | if (!atomic_read(&cmd->transport_dev_active)) { |
a1d8b49a | 4431 | spin_unlock_irqrestore(&cmd->t_state_lock, cmd_flags); |
c66ac9db NB |
4432 | goto check_cond; |
4433 | } | |
a1d8b49a | 4434 | atomic_set(&cmd->transport_dev_active, 0); |
c66ac9db | 4435 | transport_all_task_dev_remove_state(cmd); |
a1d8b49a | 4436 | spin_unlock_irqrestore(&cmd->t_state_lock, cmd_flags); |
c66ac9db NB |
4437 | |
4438 | transport_free_dev_tasks(cmd); | |
4439 | /* | |
4440 | * The Storage engine stopped this struct se_cmd before it was | |
4441 | * send to the fabric frontend for delivery back to the | |
4442 | * Initiator Node. Return this SCSI CDB back with an | |
4443 | * CHECK_CONDITION status. | |
4444 | */ | |
4445 | check_cond: | |
4446 | transport_send_check_condition_and_sense(cmd, | |
4447 | TCM_NON_EXISTENT_LUN, 0); | |
4448 | /* | |
4449 | * If the fabric frontend is waiting for this iscsi_cmd_t to | |
4450 | * be released, notify the waiting thread now that LU has | |
4451 | * finished accessing it. | |
4452 | */ | |
a1d8b49a AG |
4453 | spin_lock_irqsave(&cmd->t_state_lock, cmd_flags); |
4454 | if (atomic_read(&cmd->transport_lun_fe_stop)) { | |
6708bb27 | 4455 | pr_debug("SE_LUN[%d] - Detected FE stop for" |
c66ac9db NB |
4456 | " struct se_cmd: %p ITT: 0x%08x\n", |
4457 | lun->unpacked_lun, | |
e3d6f909 | 4458 | cmd, cmd->se_tfo->get_task_tag(cmd)); |
c66ac9db | 4459 | |
a1d8b49a | 4460 | spin_unlock_irqrestore(&cmd->t_state_lock, |
c66ac9db NB |
4461 | cmd_flags); |
4462 | transport_cmd_check_stop(cmd, 1, 0); | |
a1d8b49a | 4463 | complete(&cmd->transport_lun_fe_stop_comp); |
c66ac9db NB |
4464 | spin_lock_irqsave(&lun->lun_cmd_lock, lun_flags); |
4465 | continue; | |
4466 | } | |
6708bb27 | 4467 | pr_debug("SE_LUN[%d] - ITT: 0x%08x finished processing\n", |
e3d6f909 | 4468 | lun->unpacked_lun, cmd->se_tfo->get_task_tag(cmd)); |
c66ac9db | 4469 | |
a1d8b49a | 4470 | spin_unlock_irqrestore(&cmd->t_state_lock, cmd_flags); |
c66ac9db NB |
4471 | spin_lock_irqsave(&lun->lun_cmd_lock, lun_flags); |
4472 | } | |
4473 | spin_unlock_irqrestore(&lun->lun_cmd_lock, lun_flags); | |
4474 | } | |
4475 | ||
4476 | static int transport_clear_lun_thread(void *p) | |
4477 | { | |
4478 | struct se_lun *lun = (struct se_lun *)p; | |
4479 | ||
4480 | __transport_clear_lun_from_sessions(lun); | |
4481 | complete(&lun->lun_shutdown_comp); | |
4482 | ||
4483 | return 0; | |
4484 | } | |
4485 | ||
4486 | int transport_clear_lun_from_sessions(struct se_lun *lun) | |
4487 | { | |
4488 | struct task_struct *kt; | |
4489 | ||
5951146d | 4490 | kt = kthread_run(transport_clear_lun_thread, lun, |
c66ac9db NB |
4491 | "tcm_cl_%u", lun->unpacked_lun); |
4492 | if (IS_ERR(kt)) { | |
6708bb27 | 4493 | pr_err("Unable to start clear_lun thread\n"); |
e3d6f909 | 4494 | return PTR_ERR(kt); |
c66ac9db NB |
4495 | } |
4496 | wait_for_completion(&lun->lun_shutdown_comp); | |
4497 | ||
4498 | return 0; | |
4499 | } | |
4500 | ||
4501 | /* transport_generic_wait_for_tasks(): | |
4502 | * | |
4503 | * Called from frontend or passthrough context to wait for storage engine | |
4504 | * to pause and/or release frontend generated struct se_cmd. | |
4505 | */ | |
4506 | static void transport_generic_wait_for_tasks( | |
4507 | struct se_cmd *cmd, | |
39c05f32 | 4508 | int remove_cmd) |
c66ac9db NB |
4509 | { |
4510 | unsigned long flags; | |
4511 | ||
4512 | if (!(cmd->se_cmd_flags & SCF_SE_LUN_CMD) && !(cmd->se_tmr_req)) | |
4513 | return; | |
4514 | ||
a1d8b49a | 4515 | spin_lock_irqsave(&cmd->t_state_lock, flags); |
c66ac9db NB |
4516 | /* |
4517 | * If we are already stopped due to an external event (ie: LUN shutdown) | |
4518 | * sleep until the connection can have the passed struct se_cmd back. | |
a1d8b49a | 4519 | * The cmd->transport_lun_stopped_sem will be upped by |
c66ac9db NB |
4520 | * transport_clear_lun_from_sessions() once the ConfigFS context caller |
4521 | * has completed its operation on the struct se_cmd. | |
4522 | */ | |
a1d8b49a | 4523 | if (atomic_read(&cmd->transport_lun_stop)) { |
c66ac9db | 4524 | |
6708bb27 | 4525 | pr_debug("wait_for_tasks: Stopping" |
e3d6f909 | 4526 | " wait_for_completion(&cmd->t_tasktransport_lun_fe" |
c66ac9db | 4527 | "_stop_comp); for ITT: 0x%08x\n", |
e3d6f909 | 4528 | cmd->se_tfo->get_task_tag(cmd)); |
c66ac9db NB |
4529 | /* |
4530 | * There is a special case for WRITES where a FE exception + | |
4531 | * LUN shutdown means ConfigFS context is still sleeping on | |
4532 | * transport_lun_stop_comp in transport_lun_wait_for_tasks(). | |
4533 | * We go ahead and up transport_lun_stop_comp just to be sure | |
4534 | * here. | |
4535 | */ | |
a1d8b49a AG |
4536 | spin_unlock_irqrestore(&cmd->t_state_lock, flags); |
4537 | complete(&cmd->transport_lun_stop_comp); | |
4538 | wait_for_completion(&cmd->transport_lun_fe_stop_comp); | |
4539 | spin_lock_irqsave(&cmd->t_state_lock, flags); | |
c66ac9db NB |
4540 | |
4541 | transport_all_task_dev_remove_state(cmd); | |
4542 | /* | |
4543 | * At this point, the frontend who was the originator of this | |
4544 | * struct se_cmd, now owns the structure and can be released through | |
4545 | * normal means below. | |
4546 | */ | |
6708bb27 | 4547 | pr_debug("wait_for_tasks: Stopped" |
e3d6f909 | 4548 | " wait_for_completion(&cmd->t_tasktransport_lun_fe_" |
c66ac9db | 4549 | "stop_comp); for ITT: 0x%08x\n", |
e3d6f909 | 4550 | cmd->se_tfo->get_task_tag(cmd)); |
c66ac9db | 4551 | |
a1d8b49a | 4552 | atomic_set(&cmd->transport_lun_stop, 0); |
c66ac9db | 4553 | } |
a1d8b49a AG |
4554 | if (!atomic_read(&cmd->t_transport_active) || |
4555 | atomic_read(&cmd->t_transport_aborted)) | |
c66ac9db NB |
4556 | goto remove; |
4557 | ||
a1d8b49a | 4558 | atomic_set(&cmd->t_transport_stop, 1); |
c66ac9db | 4559 | |
6708bb27 | 4560 | pr_debug("wait_for_tasks: Stopping %p ITT: 0x%08x" |
c66ac9db | 4561 | " i_state: %d, t_state/def_t_state: %d/%d, t_transport_stop" |
e3d6f909 AG |
4562 | " = TRUE\n", cmd, cmd->se_tfo->get_task_tag(cmd), |
4563 | cmd->se_tfo->get_cmd_state(cmd), cmd->t_state, | |
c66ac9db NB |
4564 | cmd->deferred_t_state); |
4565 | ||
a1d8b49a | 4566 | spin_unlock_irqrestore(&cmd->t_state_lock, flags); |
c66ac9db | 4567 | |
5951146d | 4568 | wake_up_interruptible(&cmd->se_dev->dev_queue_obj.thread_wq); |
c66ac9db | 4569 | |
a1d8b49a | 4570 | wait_for_completion(&cmd->t_transport_stop_comp); |
c66ac9db | 4571 | |
a1d8b49a AG |
4572 | spin_lock_irqsave(&cmd->t_state_lock, flags); |
4573 | atomic_set(&cmd->t_transport_active, 0); | |
4574 | atomic_set(&cmd->t_transport_stop, 0); | |
c66ac9db | 4575 | |
6708bb27 | 4576 | pr_debug("wait_for_tasks: Stopped wait_for_compltion(" |
a1d8b49a | 4577 | "&cmd->t_transport_stop_comp) for ITT: 0x%08x\n", |
e3d6f909 | 4578 | cmd->se_tfo->get_task_tag(cmd)); |
c66ac9db | 4579 | remove: |
a1d8b49a | 4580 | spin_unlock_irqrestore(&cmd->t_state_lock, flags); |
c66ac9db NB |
4581 | if (!remove_cmd) |
4582 | return; | |
4583 | ||
39c05f32 | 4584 | transport_generic_free_cmd(cmd, 0); |
c66ac9db NB |
4585 | } |
4586 | ||
4587 | static int transport_get_sense_codes( | |
4588 | struct se_cmd *cmd, | |
4589 | u8 *asc, | |
4590 | u8 *ascq) | |
4591 | { | |
4592 | *asc = cmd->scsi_asc; | |
4593 | *ascq = cmd->scsi_ascq; | |
4594 | ||
4595 | return 0; | |
4596 | } | |
4597 | ||
4598 | static int transport_set_sense_codes( | |
4599 | struct se_cmd *cmd, | |
4600 | u8 asc, | |
4601 | u8 ascq) | |
4602 | { | |
4603 | cmd->scsi_asc = asc; | |
4604 | cmd->scsi_ascq = ascq; | |
4605 | ||
4606 | return 0; | |
4607 | } | |
4608 | ||
4609 | int transport_send_check_condition_and_sense( | |
4610 | struct se_cmd *cmd, | |
4611 | u8 reason, | |
4612 | int from_transport) | |
4613 | { | |
4614 | unsigned char *buffer = cmd->sense_buffer; | |
4615 | unsigned long flags; | |
4616 | int offset; | |
4617 | u8 asc = 0, ascq = 0; | |
4618 | ||
a1d8b49a | 4619 | spin_lock_irqsave(&cmd->t_state_lock, flags); |
c66ac9db | 4620 | if (cmd->se_cmd_flags & SCF_SENT_CHECK_CONDITION) { |
a1d8b49a | 4621 | spin_unlock_irqrestore(&cmd->t_state_lock, flags); |
c66ac9db NB |
4622 | return 0; |
4623 | } | |
4624 | cmd->se_cmd_flags |= SCF_SENT_CHECK_CONDITION; | |
a1d8b49a | 4625 | spin_unlock_irqrestore(&cmd->t_state_lock, flags); |
c66ac9db NB |
4626 | |
4627 | if (!reason && from_transport) | |
4628 | goto after_reason; | |
4629 | ||
4630 | if (!from_transport) | |
4631 | cmd->se_cmd_flags |= SCF_EMULATED_TASK_SENSE; | |
4632 | /* | |
4633 | * Data Segment and SenseLength of the fabric response PDU. | |
4634 | * | |
4635 | * TRANSPORT_SENSE_BUFFER is now set to SCSI_SENSE_BUFFERSIZE | |
4636 | * from include/scsi/scsi_cmnd.h | |
4637 | */ | |
e3d6f909 | 4638 | offset = cmd->se_tfo->set_fabric_sense_len(cmd, |
c66ac9db NB |
4639 | TRANSPORT_SENSE_BUFFER); |
4640 | /* | |
4641 | * Actual SENSE DATA, see SPC-3 7.23.2 SPC_SENSE_KEY_OFFSET uses | |
4642 | * SENSE KEY values from include/scsi/scsi.h | |
4643 | */ | |
4644 | switch (reason) { | |
4645 | case TCM_NON_EXISTENT_LUN: | |
eb39d340 NB |
4646 | /* CURRENT ERROR */ |
4647 | buffer[offset] = 0x70; | |
4648 | /* ILLEGAL REQUEST */ | |
4649 | buffer[offset+SPC_SENSE_KEY_OFFSET] = ILLEGAL_REQUEST; | |
4650 | /* LOGICAL UNIT NOT SUPPORTED */ | |
4651 | buffer[offset+SPC_ASC_KEY_OFFSET] = 0x25; | |
4652 | break; | |
c66ac9db NB |
4653 | case TCM_UNSUPPORTED_SCSI_OPCODE: |
4654 | case TCM_SECTOR_COUNT_TOO_MANY: | |
4655 | /* CURRENT ERROR */ | |
4656 | buffer[offset] = 0x70; | |
4657 | /* ILLEGAL REQUEST */ | |
4658 | buffer[offset+SPC_SENSE_KEY_OFFSET] = ILLEGAL_REQUEST; | |
4659 | /* INVALID COMMAND OPERATION CODE */ | |
4660 | buffer[offset+SPC_ASC_KEY_OFFSET] = 0x20; | |
4661 | break; | |
4662 | case TCM_UNKNOWN_MODE_PAGE: | |
4663 | /* CURRENT ERROR */ | |
4664 | buffer[offset] = 0x70; | |
4665 | /* ILLEGAL REQUEST */ | |
4666 | buffer[offset+SPC_SENSE_KEY_OFFSET] = ILLEGAL_REQUEST; | |
4667 | /* INVALID FIELD IN CDB */ | |
4668 | buffer[offset+SPC_ASC_KEY_OFFSET] = 0x24; | |
4669 | break; | |
4670 | case TCM_CHECK_CONDITION_ABORT_CMD: | |
4671 | /* CURRENT ERROR */ | |
4672 | buffer[offset] = 0x70; | |
4673 | /* ABORTED COMMAND */ | |
4674 | buffer[offset+SPC_SENSE_KEY_OFFSET] = ABORTED_COMMAND; | |
4675 | /* BUS DEVICE RESET FUNCTION OCCURRED */ | |
4676 | buffer[offset+SPC_ASC_KEY_OFFSET] = 0x29; | |
4677 | buffer[offset+SPC_ASCQ_KEY_OFFSET] = 0x03; | |
4678 | break; | |
4679 | case TCM_INCORRECT_AMOUNT_OF_DATA: | |
4680 | /* CURRENT ERROR */ | |
4681 | buffer[offset] = 0x70; | |
4682 | /* ABORTED COMMAND */ | |
4683 | buffer[offset+SPC_SENSE_KEY_OFFSET] = ABORTED_COMMAND; | |
4684 | /* WRITE ERROR */ | |
4685 | buffer[offset+SPC_ASC_KEY_OFFSET] = 0x0c; | |
4686 | /* NOT ENOUGH UNSOLICITED DATA */ | |
4687 | buffer[offset+SPC_ASCQ_KEY_OFFSET] = 0x0d; | |
4688 | break; | |
4689 | case TCM_INVALID_CDB_FIELD: | |
4690 | /* CURRENT ERROR */ | |
4691 | buffer[offset] = 0x70; | |
4692 | /* ABORTED COMMAND */ | |
4693 | buffer[offset+SPC_SENSE_KEY_OFFSET] = ABORTED_COMMAND; | |
4694 | /* INVALID FIELD IN CDB */ | |
4695 | buffer[offset+SPC_ASC_KEY_OFFSET] = 0x24; | |
4696 | break; | |
4697 | case TCM_INVALID_PARAMETER_LIST: | |
4698 | /* CURRENT ERROR */ | |
4699 | buffer[offset] = 0x70; | |
4700 | /* ABORTED COMMAND */ | |
4701 | buffer[offset+SPC_SENSE_KEY_OFFSET] = ABORTED_COMMAND; | |
4702 | /* INVALID FIELD IN PARAMETER LIST */ | |
4703 | buffer[offset+SPC_ASC_KEY_OFFSET] = 0x26; | |
4704 | break; | |
4705 | case TCM_UNEXPECTED_UNSOLICITED_DATA: | |
4706 | /* CURRENT ERROR */ | |
4707 | buffer[offset] = 0x70; | |
4708 | /* ABORTED COMMAND */ | |
4709 | buffer[offset+SPC_SENSE_KEY_OFFSET] = ABORTED_COMMAND; | |
4710 | /* WRITE ERROR */ | |
4711 | buffer[offset+SPC_ASC_KEY_OFFSET] = 0x0c; | |
4712 | /* UNEXPECTED_UNSOLICITED_DATA */ | |
4713 | buffer[offset+SPC_ASCQ_KEY_OFFSET] = 0x0c; | |
4714 | break; | |
4715 | case TCM_SERVICE_CRC_ERROR: | |
4716 | /* CURRENT ERROR */ | |
4717 | buffer[offset] = 0x70; | |
4718 | /* ABORTED COMMAND */ | |
4719 | buffer[offset+SPC_SENSE_KEY_OFFSET] = ABORTED_COMMAND; | |
4720 | /* PROTOCOL SERVICE CRC ERROR */ | |
4721 | buffer[offset+SPC_ASC_KEY_OFFSET] = 0x47; | |
4722 | /* N/A */ | |
4723 | buffer[offset+SPC_ASCQ_KEY_OFFSET] = 0x05; | |
4724 | break; | |
4725 | case TCM_SNACK_REJECTED: | |
4726 | /* CURRENT ERROR */ | |
4727 | buffer[offset] = 0x70; | |
4728 | /* ABORTED COMMAND */ | |
4729 | buffer[offset+SPC_SENSE_KEY_OFFSET] = ABORTED_COMMAND; | |
4730 | /* READ ERROR */ | |
4731 | buffer[offset+SPC_ASC_KEY_OFFSET] = 0x11; | |
4732 | /* FAILED RETRANSMISSION REQUEST */ | |
4733 | buffer[offset+SPC_ASCQ_KEY_OFFSET] = 0x13; | |
4734 | break; | |
4735 | case TCM_WRITE_PROTECTED: | |
4736 | /* CURRENT ERROR */ | |
4737 | buffer[offset] = 0x70; | |
4738 | /* DATA PROTECT */ | |
4739 | buffer[offset+SPC_SENSE_KEY_OFFSET] = DATA_PROTECT; | |
4740 | /* WRITE PROTECTED */ | |
4741 | buffer[offset+SPC_ASC_KEY_OFFSET] = 0x27; | |
4742 | break; | |
4743 | case TCM_CHECK_CONDITION_UNIT_ATTENTION: | |
4744 | /* CURRENT ERROR */ | |
4745 | buffer[offset] = 0x70; | |
4746 | /* UNIT ATTENTION */ | |
4747 | buffer[offset+SPC_SENSE_KEY_OFFSET] = UNIT_ATTENTION; | |
4748 | core_scsi3_ua_for_check_condition(cmd, &asc, &ascq); | |
4749 | buffer[offset+SPC_ASC_KEY_OFFSET] = asc; | |
4750 | buffer[offset+SPC_ASCQ_KEY_OFFSET] = ascq; | |
4751 | break; | |
4752 | case TCM_CHECK_CONDITION_NOT_READY: | |
4753 | /* CURRENT ERROR */ | |
4754 | buffer[offset] = 0x70; | |
4755 | /* Not Ready */ | |
4756 | buffer[offset+SPC_SENSE_KEY_OFFSET] = NOT_READY; | |
4757 | transport_get_sense_codes(cmd, &asc, &ascq); | |
4758 | buffer[offset+SPC_ASC_KEY_OFFSET] = asc; | |
4759 | buffer[offset+SPC_ASCQ_KEY_OFFSET] = ascq; | |
4760 | break; | |
4761 | case TCM_LOGICAL_UNIT_COMMUNICATION_FAILURE: | |
4762 | default: | |
4763 | /* CURRENT ERROR */ | |
4764 | buffer[offset] = 0x70; | |
4765 | /* ILLEGAL REQUEST */ | |
4766 | buffer[offset+SPC_SENSE_KEY_OFFSET] = ILLEGAL_REQUEST; | |
4767 | /* LOGICAL UNIT COMMUNICATION FAILURE */ | |
4768 | buffer[offset+SPC_ASC_KEY_OFFSET] = 0x80; | |
4769 | break; | |
4770 | } | |
4771 | /* | |
4772 | * This code uses linux/include/scsi/scsi.h SAM status codes! | |
4773 | */ | |
4774 | cmd->scsi_status = SAM_STAT_CHECK_CONDITION; | |
4775 | /* | |
4776 | * Automatically padded, this value is encoded in the fabric's | |
4777 | * data_length response PDU containing the SCSI defined sense data. | |
4778 | */ | |
4779 | cmd->scsi_sense_length = TRANSPORT_SENSE_BUFFER + offset; | |
4780 | ||
4781 | after_reason: | |
07bde79a | 4782 | return cmd->se_tfo->queue_status(cmd); |
c66ac9db NB |
4783 | } |
4784 | EXPORT_SYMBOL(transport_send_check_condition_and_sense); | |
4785 | ||
4786 | int transport_check_aborted_status(struct se_cmd *cmd, int send_status) | |
4787 | { | |
4788 | int ret = 0; | |
4789 | ||
a1d8b49a | 4790 | if (atomic_read(&cmd->t_transport_aborted) != 0) { |
6708bb27 | 4791 | if (!send_status || |
c66ac9db NB |
4792 | (cmd->se_cmd_flags & SCF_SENT_DELAYED_TAS)) |
4793 | return 1; | |
4794 | #if 0 | |
6708bb27 | 4795 | pr_debug("Sending delayed SAM_STAT_TASK_ABORTED" |
c66ac9db | 4796 | " status for CDB: 0x%02x ITT: 0x%08x\n", |
a1d8b49a | 4797 | cmd->t_task_cdb[0], |
e3d6f909 | 4798 | cmd->se_tfo->get_task_tag(cmd)); |
c66ac9db NB |
4799 | #endif |
4800 | cmd->se_cmd_flags |= SCF_SENT_DELAYED_TAS; | |
e3d6f909 | 4801 | cmd->se_tfo->queue_status(cmd); |
c66ac9db NB |
4802 | ret = 1; |
4803 | } | |
4804 | return ret; | |
4805 | } | |
4806 | EXPORT_SYMBOL(transport_check_aborted_status); | |
4807 | ||
4808 | void transport_send_task_abort(struct se_cmd *cmd) | |
4809 | { | |
c252f003 NB |
4810 | unsigned long flags; |
4811 | ||
4812 | spin_lock_irqsave(&cmd->t_state_lock, flags); | |
4813 | if (cmd->se_cmd_flags & SCF_SENT_CHECK_CONDITION) { | |
4814 | spin_unlock_irqrestore(&cmd->t_state_lock, flags); | |
4815 | return; | |
4816 | } | |
4817 | spin_unlock_irqrestore(&cmd->t_state_lock, flags); | |
4818 | ||
c66ac9db NB |
4819 | /* |
4820 | * If there are still expected incoming fabric WRITEs, we wait | |
4821 | * until until they have completed before sending a TASK_ABORTED | |
4822 | * response. This response with TASK_ABORTED status will be | |
4823 | * queued back to fabric module by transport_check_aborted_status(). | |
4824 | */ | |
4825 | if (cmd->data_direction == DMA_TO_DEVICE) { | |
e3d6f909 | 4826 | if (cmd->se_tfo->write_pending_status(cmd) != 0) { |
a1d8b49a | 4827 | atomic_inc(&cmd->t_transport_aborted); |
c66ac9db NB |
4828 | smp_mb__after_atomic_inc(); |
4829 | cmd->scsi_status = SAM_STAT_TASK_ABORTED; | |
4830 | transport_new_cmd_failure(cmd); | |
4831 | return; | |
4832 | } | |
4833 | } | |
4834 | cmd->scsi_status = SAM_STAT_TASK_ABORTED; | |
4835 | #if 0 | |
6708bb27 | 4836 | pr_debug("Setting SAM_STAT_TASK_ABORTED status for CDB: 0x%02x," |
a1d8b49a | 4837 | " ITT: 0x%08x\n", cmd->t_task_cdb[0], |
e3d6f909 | 4838 | cmd->se_tfo->get_task_tag(cmd)); |
c66ac9db | 4839 | #endif |
e3d6f909 | 4840 | cmd->se_tfo->queue_status(cmd); |
c66ac9db NB |
4841 | } |
4842 | ||
4843 | /* transport_generic_do_tmr(): | |
4844 | * | |
4845 | * | |
4846 | */ | |
4847 | int transport_generic_do_tmr(struct se_cmd *cmd) | |
4848 | { | |
5951146d | 4849 | struct se_device *dev = cmd->se_dev; |
c66ac9db NB |
4850 | struct se_tmr_req *tmr = cmd->se_tmr_req; |
4851 | int ret; | |
4852 | ||
4853 | switch (tmr->function) { | |
5c6cd613 | 4854 | case TMR_ABORT_TASK: |
c66ac9db NB |
4855 | tmr->response = TMR_FUNCTION_REJECTED; |
4856 | break; | |
5c6cd613 NB |
4857 | case TMR_ABORT_TASK_SET: |
4858 | case TMR_CLEAR_ACA: | |
4859 | case TMR_CLEAR_TASK_SET: | |
c66ac9db NB |
4860 | tmr->response = TMR_TASK_MGMT_FUNCTION_NOT_SUPPORTED; |
4861 | break; | |
5c6cd613 | 4862 | case TMR_LUN_RESET: |
c66ac9db NB |
4863 | ret = core_tmr_lun_reset(dev, tmr, NULL, NULL); |
4864 | tmr->response = (!ret) ? TMR_FUNCTION_COMPLETE : | |
4865 | TMR_FUNCTION_REJECTED; | |
4866 | break; | |
5c6cd613 | 4867 | case TMR_TARGET_WARM_RESET: |
c66ac9db NB |
4868 | tmr->response = TMR_FUNCTION_REJECTED; |
4869 | break; | |
5c6cd613 | 4870 | case TMR_TARGET_COLD_RESET: |
c66ac9db NB |
4871 | tmr->response = TMR_FUNCTION_REJECTED; |
4872 | break; | |
c66ac9db | 4873 | default: |
6708bb27 | 4874 | pr_err("Uknown TMR function: 0x%02x.\n", |
c66ac9db NB |
4875 | tmr->function); |
4876 | tmr->response = TMR_FUNCTION_REJECTED; | |
4877 | break; | |
4878 | } | |
4879 | ||
4880 | cmd->t_state = TRANSPORT_ISTATE_PROCESSING; | |
e3d6f909 | 4881 | cmd->se_tfo->queue_tm_rsp(cmd); |
c66ac9db NB |
4882 | |
4883 | transport_cmd_check_stop(cmd, 2, 0); | |
4884 | return 0; | |
4885 | } | |
4886 | ||
4887 | /* | |
4888 | * Called with spin_lock_irq(&dev->execute_task_lock); held | |
4889 | * | |
4890 | */ | |
4891 | static struct se_task * | |
4892 | transport_get_task_from_state_list(struct se_device *dev) | |
4893 | { | |
4894 | struct se_task *task; | |
4895 | ||
4896 | if (list_empty(&dev->state_task_list)) | |
4897 | return NULL; | |
4898 | ||
4899 | list_for_each_entry(task, &dev->state_task_list, t_state_list) | |
4900 | break; | |
4901 | ||
4902 | list_del(&task->t_state_list); | |
4903 | atomic_set(&task->task_state_active, 0); | |
4904 | ||
4905 | return task; | |
4906 | } | |
4907 | ||
4908 | static void transport_processing_shutdown(struct se_device *dev) | |
4909 | { | |
4910 | struct se_cmd *cmd; | |
c66ac9db | 4911 | struct se_task *task; |
c66ac9db NB |
4912 | unsigned long flags; |
4913 | /* | |
4914 | * Empty the struct se_device's struct se_task state list. | |
4915 | */ | |
4916 | spin_lock_irqsave(&dev->execute_task_lock, flags); | |
4917 | while ((task = transport_get_task_from_state_list(dev))) { | |
e3d6f909 | 4918 | if (!task->task_se_cmd) { |
6708bb27 | 4919 | pr_err("task->task_se_cmd is NULL!\n"); |
c66ac9db NB |
4920 | continue; |
4921 | } | |
e3d6f909 | 4922 | cmd = task->task_se_cmd; |
c66ac9db | 4923 | |
c66ac9db NB |
4924 | spin_unlock_irqrestore(&dev->execute_task_lock, flags); |
4925 | ||
a1d8b49a | 4926 | spin_lock_irqsave(&cmd->t_state_lock, flags); |
c66ac9db | 4927 | |
6708bb27 AG |
4928 | pr_debug("PT: cmd: %p task: %p ITT: 0x%08x," |
4929 | " i_state: %d, t_state/def_t_state:" | |
c66ac9db | 4930 | " %d/%d cdb: 0x%02x\n", cmd, task, |
6708bb27 AG |
4931 | cmd->se_tfo->get_task_tag(cmd), |
4932 | cmd->se_tfo->get_cmd_state(cmd), | |
c66ac9db | 4933 | cmd->t_state, cmd->deferred_t_state, |
a1d8b49a | 4934 | cmd->t_task_cdb[0]); |
6708bb27 | 4935 | pr_debug("PT: ITT[0x%08x] - t_tasks: %d t_task_cdbs_left:" |
c66ac9db NB |
4936 | " %d t_task_cdbs_sent: %d -- t_transport_active: %d" |
4937 | " t_transport_stop: %d t_transport_sent: %d\n", | |
e3d6f909 | 4938 | cmd->se_tfo->get_task_tag(cmd), |
6708bb27 | 4939 | cmd->t_task_list_num, |
a1d8b49a AG |
4940 | atomic_read(&cmd->t_task_cdbs_left), |
4941 | atomic_read(&cmd->t_task_cdbs_sent), | |
4942 | atomic_read(&cmd->t_transport_active), | |
4943 | atomic_read(&cmd->t_transport_stop), | |
4944 | atomic_read(&cmd->t_transport_sent)); | |
c66ac9db NB |
4945 | |
4946 | if (atomic_read(&task->task_active)) { | |
4947 | atomic_set(&task->task_stop, 1); | |
4948 | spin_unlock_irqrestore( | |
a1d8b49a | 4949 | &cmd->t_state_lock, flags); |
c66ac9db | 4950 | |
6708bb27 | 4951 | pr_debug("Waiting for task: %p to shutdown for dev:" |
c66ac9db NB |
4952 | " %p\n", task, dev); |
4953 | wait_for_completion(&task->task_stop_comp); | |
6708bb27 | 4954 | pr_debug("Completed task: %p shutdown for dev: %p\n", |
c66ac9db NB |
4955 | task, dev); |
4956 | ||
a1d8b49a AG |
4957 | spin_lock_irqsave(&cmd->t_state_lock, flags); |
4958 | atomic_dec(&cmd->t_task_cdbs_left); | |
c66ac9db NB |
4959 | |
4960 | atomic_set(&task->task_active, 0); | |
4961 | atomic_set(&task->task_stop, 0); | |
52208ae3 NB |
4962 | } else { |
4963 | if (atomic_read(&task->task_execute_queue) != 0) | |
4964 | transport_remove_task_from_execute_queue(task, dev); | |
c66ac9db NB |
4965 | } |
4966 | __transport_stop_task_timer(task, &flags); | |
4967 | ||
6708bb27 | 4968 | if (!atomic_dec_and_test(&cmd->t_task_cdbs_ex_left)) { |
c66ac9db | 4969 | spin_unlock_irqrestore( |
a1d8b49a | 4970 | &cmd->t_state_lock, flags); |
c66ac9db | 4971 | |
6708bb27 | 4972 | pr_debug("Skipping task: %p, dev: %p for" |
c66ac9db | 4973 | " t_task_cdbs_ex_left: %d\n", task, dev, |
a1d8b49a | 4974 | atomic_read(&cmd->t_task_cdbs_ex_left)); |
c66ac9db NB |
4975 | |
4976 | spin_lock_irqsave(&dev->execute_task_lock, flags); | |
4977 | continue; | |
4978 | } | |
4979 | ||
a1d8b49a | 4980 | if (atomic_read(&cmd->t_transport_active)) { |
6708bb27 | 4981 | pr_debug("got t_transport_active = 1 for task: %p, dev:" |
c66ac9db NB |
4982 | " %p\n", task, dev); |
4983 | ||
a1d8b49a | 4984 | if (atomic_read(&cmd->t_fe_count)) { |
c66ac9db | 4985 | spin_unlock_irqrestore( |
a1d8b49a | 4986 | &cmd->t_state_lock, flags); |
c66ac9db NB |
4987 | transport_send_check_condition_and_sense( |
4988 | cmd, TCM_LOGICAL_UNIT_COMMUNICATION_FAILURE, | |
4989 | 0); | |
4990 | transport_remove_cmd_from_queue(cmd, | |
5951146d | 4991 | &cmd->se_dev->dev_queue_obj); |
c66ac9db NB |
4992 | |
4993 | transport_lun_remove_cmd(cmd); | |
4994 | transport_cmd_check_stop(cmd, 1, 0); | |
4995 | } else { | |
4996 | spin_unlock_irqrestore( | |
a1d8b49a | 4997 | &cmd->t_state_lock, flags); |
c66ac9db NB |
4998 | |
4999 | transport_remove_cmd_from_queue(cmd, | |
5951146d | 5000 | &cmd->se_dev->dev_queue_obj); |
c66ac9db NB |
5001 | |
5002 | transport_lun_remove_cmd(cmd); | |
5003 | ||
5004 | if (transport_cmd_check_stop(cmd, 1, 0)) | |
e6a2573f | 5005 | transport_put_cmd(cmd); |
c66ac9db NB |
5006 | } |
5007 | ||
5008 | spin_lock_irqsave(&dev->execute_task_lock, flags); | |
5009 | continue; | |
5010 | } | |
6708bb27 | 5011 | pr_debug("Got t_transport_active = 0 for task: %p, dev: %p\n", |
c66ac9db NB |
5012 | task, dev); |
5013 | ||
a1d8b49a | 5014 | if (atomic_read(&cmd->t_fe_count)) { |
c66ac9db | 5015 | spin_unlock_irqrestore( |
a1d8b49a | 5016 | &cmd->t_state_lock, flags); |
c66ac9db NB |
5017 | transport_send_check_condition_and_sense(cmd, |
5018 | TCM_LOGICAL_UNIT_COMMUNICATION_FAILURE, 0); | |
5019 | transport_remove_cmd_from_queue(cmd, | |
5951146d | 5020 | &cmd->se_dev->dev_queue_obj); |
c66ac9db NB |
5021 | |
5022 | transport_lun_remove_cmd(cmd); | |
5023 | transport_cmd_check_stop(cmd, 1, 0); | |
5024 | } else { | |
5025 | spin_unlock_irqrestore( | |
a1d8b49a | 5026 | &cmd->t_state_lock, flags); |
c66ac9db NB |
5027 | |
5028 | transport_remove_cmd_from_queue(cmd, | |
5951146d | 5029 | &cmd->se_dev->dev_queue_obj); |
c66ac9db NB |
5030 | transport_lun_remove_cmd(cmd); |
5031 | ||
5032 | if (transport_cmd_check_stop(cmd, 1, 0)) | |
e6a2573f | 5033 | transport_put_cmd(cmd); |
c66ac9db NB |
5034 | } |
5035 | ||
5036 | spin_lock_irqsave(&dev->execute_task_lock, flags); | |
5037 | } | |
5038 | spin_unlock_irqrestore(&dev->execute_task_lock, flags); | |
5039 | /* | |
5040 | * Empty the struct se_device's struct se_cmd list. | |
5041 | */ | |
5951146d | 5042 | while ((cmd = transport_get_cmd_from_queue(&dev->dev_queue_obj))) { |
c66ac9db | 5043 | |
6708bb27 | 5044 | pr_debug("From Device Queue: cmd: %p t_state: %d\n", |
5951146d | 5045 | cmd, cmd->t_state); |
c66ac9db | 5046 | |
a1d8b49a | 5047 | if (atomic_read(&cmd->t_fe_count)) { |
c66ac9db NB |
5048 | transport_send_check_condition_and_sense(cmd, |
5049 | TCM_LOGICAL_UNIT_COMMUNICATION_FAILURE, 0); | |
5050 | ||
5051 | transport_lun_remove_cmd(cmd); | |
5052 | transport_cmd_check_stop(cmd, 1, 0); | |
5053 | } else { | |
5054 | transport_lun_remove_cmd(cmd); | |
5055 | if (transport_cmd_check_stop(cmd, 1, 0)) | |
e6a2573f | 5056 | transport_put_cmd(cmd); |
c66ac9db | 5057 | } |
c66ac9db | 5058 | } |
c66ac9db NB |
5059 | } |
5060 | ||
5061 | /* transport_processing_thread(): | |
5062 | * | |
5063 | * | |
5064 | */ | |
5065 | static int transport_processing_thread(void *param) | |
5066 | { | |
5951146d | 5067 | int ret; |
c66ac9db NB |
5068 | struct se_cmd *cmd; |
5069 | struct se_device *dev = (struct se_device *) param; | |
c66ac9db NB |
5070 | |
5071 | set_user_nice(current, -20); | |
5072 | ||
5073 | while (!kthread_should_stop()) { | |
e3d6f909 AG |
5074 | ret = wait_event_interruptible(dev->dev_queue_obj.thread_wq, |
5075 | atomic_read(&dev->dev_queue_obj.queue_cnt) || | |
c66ac9db NB |
5076 | kthread_should_stop()); |
5077 | if (ret < 0) | |
5078 | goto out; | |
5079 | ||
5080 | spin_lock_irq(&dev->dev_status_lock); | |
5081 | if (dev->dev_status & TRANSPORT_DEVICE_SHUTDOWN) { | |
5082 | spin_unlock_irq(&dev->dev_status_lock); | |
5083 | transport_processing_shutdown(dev); | |
5084 | continue; | |
5085 | } | |
5086 | spin_unlock_irq(&dev->dev_status_lock); | |
5087 | ||
5088 | get_cmd: | |
5089 | __transport_execute_tasks(dev); | |
5090 | ||
5951146d AG |
5091 | cmd = transport_get_cmd_from_queue(&dev->dev_queue_obj); |
5092 | if (!cmd) | |
c66ac9db NB |
5093 | continue; |
5094 | ||
5951146d | 5095 | switch (cmd->t_state) { |
680b73c5 CH |
5096 | case TRANSPORT_NEW_CMD: |
5097 | BUG(); | |
5098 | break; | |
c66ac9db | 5099 | case TRANSPORT_NEW_CMD_MAP: |
6708bb27 AG |
5100 | if (!cmd->se_tfo->new_cmd_map) { |
5101 | pr_err("cmd->se_tfo->new_cmd_map is" | |
c66ac9db NB |
5102 | " NULL for TRANSPORT_NEW_CMD_MAP\n"); |
5103 | BUG(); | |
5104 | } | |
e3d6f909 | 5105 | ret = cmd->se_tfo->new_cmd_map(cmd); |
c66ac9db NB |
5106 | if (ret < 0) { |
5107 | cmd->transport_error_status = ret; | |
5108 | transport_generic_request_failure(cmd, NULL, | |
5109 | 0, (cmd->data_direction != | |
5110 | DMA_TO_DEVICE)); | |
5111 | break; | |
5112 | } | |
c66ac9db | 5113 | ret = transport_generic_new_cmd(cmd); |
07bde79a NB |
5114 | if (ret == -EAGAIN) |
5115 | break; | |
5116 | else if (ret < 0) { | |
c66ac9db NB |
5117 | cmd->transport_error_status = ret; |
5118 | transport_generic_request_failure(cmd, NULL, | |
5119 | 0, (cmd->data_direction != | |
5120 | DMA_TO_DEVICE)); | |
5121 | } | |
5122 | break; | |
5123 | case TRANSPORT_PROCESS_WRITE: | |
5124 | transport_generic_process_write(cmd); | |
5125 | break; | |
5126 | case TRANSPORT_COMPLETE_OK: | |
5127 | transport_stop_all_task_timers(cmd); | |
5128 | transport_generic_complete_ok(cmd); | |
5129 | break; | |
5130 | case TRANSPORT_REMOVE: | |
e6a2573f | 5131 | transport_put_cmd(cmd); |
c66ac9db | 5132 | break; |
f4366772 | 5133 | case TRANSPORT_FREE_CMD_INTR: |
82f1c8a4 | 5134 | transport_generic_free_cmd(cmd, 0); |
f4366772 | 5135 | break; |
c66ac9db NB |
5136 | case TRANSPORT_PROCESS_TMR: |
5137 | transport_generic_do_tmr(cmd); | |
5138 | break; | |
5139 | case TRANSPORT_COMPLETE_FAILURE: | |
5140 | transport_generic_request_failure(cmd, NULL, 1, 1); | |
5141 | break; | |
5142 | case TRANSPORT_COMPLETE_TIMEOUT: | |
5143 | transport_stop_all_task_timers(cmd); | |
5144 | transport_generic_request_timeout(cmd); | |
5145 | break; | |
07bde79a NB |
5146 | case TRANSPORT_COMPLETE_QF_WP: |
5147 | transport_generic_write_pending(cmd); | |
5148 | break; | |
c66ac9db | 5149 | default: |
6708bb27 | 5150 | pr_err("Unknown t_state: %d deferred_t_state:" |
c66ac9db | 5151 | " %d for ITT: 0x%08x i_state: %d on SE LUN:" |
5951146d | 5152 | " %u\n", cmd->t_state, cmd->deferred_t_state, |
e3d6f909 AG |
5153 | cmd->se_tfo->get_task_tag(cmd), |
5154 | cmd->se_tfo->get_cmd_state(cmd), | |
5155 | cmd->se_lun->unpacked_lun); | |
c66ac9db NB |
5156 | BUG(); |
5157 | } | |
5158 | ||
5159 | goto get_cmd; | |
5160 | } | |
5161 | ||
5162 | out: | |
5163 | transport_release_all_cmds(dev); | |
5164 | dev->process_thread = NULL; | |
5165 | return 0; | |
5166 | } |