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c66ac9db NB |
1 | /******************************************************************************* |
2 | * Filename: target_core_transport.c | |
3 | * | |
4 | * This file contains the Generic Target Engine Core. | |
5 | * | |
6 | * Copyright (c) 2002, 2003, 2004, 2005 PyX Technologies, Inc. | |
7 | * Copyright (c) 2005, 2006, 2007 SBE, Inc. | |
8 | * Copyright (c) 2007-2010 Rising Tide Systems | |
9 | * Copyright (c) 2008-2010 Linux-iSCSI.org | |
10 | * | |
11 | * Nicholas A. Bellinger <nab@kernel.org> | |
12 | * | |
13 | * This program is free software; you can redistribute it and/or modify | |
14 | * it under the terms of the GNU General Public License as published by | |
15 | * the Free Software Foundation; either version 2 of the License, or | |
16 | * (at your option) any later version. | |
17 | * | |
18 | * This program is distributed in the hope that it will be useful, | |
19 | * but WITHOUT ANY WARRANTY; without even the implied warranty of | |
20 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
21 | * GNU General Public License for more details. | |
22 | * | |
23 | * You should have received a copy of the GNU General Public License | |
24 | * along with this program; if not, write to the Free Software | |
25 | * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. | |
26 | * | |
27 | ******************************************************************************/ | |
28 | ||
29 | #include <linux/version.h> | |
30 | #include <linux/net.h> | |
31 | #include <linux/delay.h> | |
32 | #include <linux/string.h> | |
33 | #include <linux/timer.h> | |
34 | #include <linux/slab.h> | |
35 | #include <linux/blkdev.h> | |
36 | #include <linux/spinlock.h> | |
c66ac9db NB |
37 | #include <linux/kthread.h> |
38 | #include <linux/in.h> | |
39 | #include <linux/cdrom.h> | |
40 | #include <asm/unaligned.h> | |
41 | #include <net/sock.h> | |
42 | #include <net/tcp.h> | |
43 | #include <scsi/scsi.h> | |
44 | #include <scsi/scsi_cmnd.h> | |
e66ecd50 | 45 | #include <scsi/scsi_tcq.h> |
c66ac9db NB |
46 | |
47 | #include <target/target_core_base.h> | |
48 | #include <target/target_core_device.h> | |
49 | #include <target/target_core_tmr.h> | |
50 | #include <target/target_core_tpg.h> | |
51 | #include <target/target_core_transport.h> | |
52 | #include <target/target_core_fabric_ops.h> | |
53 | #include <target/target_core_configfs.h> | |
54 | ||
55 | #include "target_core_alua.h" | |
56 | #include "target_core_hba.h" | |
57 | #include "target_core_pr.h" | |
58 | #include "target_core_scdb.h" | |
59 | #include "target_core_ua.h" | |
60 | ||
e3d6f909 | 61 | static int sub_api_initialized; |
c66ac9db NB |
62 | |
63 | static struct kmem_cache *se_cmd_cache; | |
64 | static struct kmem_cache *se_sess_cache; | |
65 | struct kmem_cache *se_tmr_req_cache; | |
66 | struct kmem_cache *se_ua_cache; | |
c66ac9db NB |
67 | struct kmem_cache *t10_pr_reg_cache; |
68 | struct kmem_cache *t10_alua_lu_gp_cache; | |
69 | struct kmem_cache *t10_alua_lu_gp_mem_cache; | |
70 | struct kmem_cache *t10_alua_tg_pt_gp_cache; | |
71 | struct kmem_cache *t10_alua_tg_pt_gp_mem_cache; | |
72 | ||
73 | /* Used for transport_dev_get_map_*() */ | |
74 | typedef int (*map_func_t)(struct se_task *, u32); | |
75 | ||
76 | static int transport_generic_write_pending(struct se_cmd *); | |
5951146d | 77 | static int transport_processing_thread(void *param); |
c66ac9db NB |
78 | static int __transport_execute_tasks(struct se_device *dev); |
79 | static void transport_complete_task_attr(struct se_cmd *cmd); | |
07bde79a NB |
80 | static int transport_complete_qf(struct se_cmd *cmd); |
81 | static void transport_handle_queue_full(struct se_cmd *cmd, | |
82 | struct se_device *dev, int (*qf_callback)(struct se_cmd *)); | |
c66ac9db NB |
83 | static void transport_direct_request_timeout(struct se_cmd *cmd); |
84 | static void transport_free_dev_tasks(struct se_cmd *cmd); | |
a1d8b49a | 85 | static u32 transport_allocate_tasks(struct se_cmd *cmd, |
ec98f782 | 86 | unsigned long long starting_lba, |
c66ac9db | 87 | enum dma_data_direction data_direction, |
ec98f782 | 88 | struct scatterlist *sgl, unsigned int nents); |
05d1c7c0 | 89 | static int transport_generic_get_mem(struct se_cmd *cmd); |
c66ac9db | 90 | static int transport_generic_remove(struct se_cmd *cmd, |
35462975 | 91 | int session_reinstatement); |
c66ac9db NB |
92 | static void transport_release_fe_cmd(struct se_cmd *cmd); |
93 | static void transport_remove_cmd_from_queue(struct se_cmd *cmd, | |
94 | struct se_queue_obj *qobj); | |
95 | static int transport_set_sense_codes(struct se_cmd *cmd, u8 asc, u8 ascq); | |
96 | static void transport_stop_all_task_timers(struct se_cmd *cmd); | |
97 | ||
e3d6f909 | 98 | int init_se_kmem_caches(void) |
c66ac9db | 99 | { |
c66ac9db NB |
100 | se_cmd_cache = kmem_cache_create("se_cmd_cache", |
101 | sizeof(struct se_cmd), __alignof__(struct se_cmd), 0, NULL); | |
6708bb27 AG |
102 | if (!se_cmd_cache) { |
103 | pr_err("kmem_cache_create for struct se_cmd failed\n"); | |
c66ac9db NB |
104 | goto out; |
105 | } | |
106 | se_tmr_req_cache = kmem_cache_create("se_tmr_cache", | |
107 | sizeof(struct se_tmr_req), __alignof__(struct se_tmr_req), | |
108 | 0, NULL); | |
6708bb27 AG |
109 | if (!se_tmr_req_cache) { |
110 | pr_err("kmem_cache_create() for struct se_tmr_req" | |
c66ac9db NB |
111 | " failed\n"); |
112 | goto out; | |
113 | } | |
114 | se_sess_cache = kmem_cache_create("se_sess_cache", | |
115 | sizeof(struct se_session), __alignof__(struct se_session), | |
116 | 0, NULL); | |
6708bb27 AG |
117 | if (!se_sess_cache) { |
118 | pr_err("kmem_cache_create() for struct se_session" | |
c66ac9db NB |
119 | " failed\n"); |
120 | goto out; | |
121 | } | |
122 | se_ua_cache = kmem_cache_create("se_ua_cache", | |
123 | sizeof(struct se_ua), __alignof__(struct se_ua), | |
124 | 0, NULL); | |
6708bb27 AG |
125 | if (!se_ua_cache) { |
126 | pr_err("kmem_cache_create() for struct se_ua failed\n"); | |
c66ac9db NB |
127 | goto out; |
128 | } | |
c66ac9db NB |
129 | t10_pr_reg_cache = kmem_cache_create("t10_pr_reg_cache", |
130 | sizeof(struct t10_pr_registration), | |
131 | __alignof__(struct t10_pr_registration), 0, NULL); | |
6708bb27 AG |
132 | if (!t10_pr_reg_cache) { |
133 | pr_err("kmem_cache_create() for struct t10_pr_registration" | |
c66ac9db NB |
134 | " failed\n"); |
135 | goto out; | |
136 | } | |
137 | t10_alua_lu_gp_cache = kmem_cache_create("t10_alua_lu_gp_cache", | |
138 | sizeof(struct t10_alua_lu_gp), __alignof__(struct t10_alua_lu_gp), | |
139 | 0, NULL); | |
6708bb27 AG |
140 | if (!t10_alua_lu_gp_cache) { |
141 | pr_err("kmem_cache_create() for t10_alua_lu_gp_cache" | |
c66ac9db NB |
142 | " failed\n"); |
143 | goto out; | |
144 | } | |
145 | t10_alua_lu_gp_mem_cache = kmem_cache_create("t10_alua_lu_gp_mem_cache", | |
146 | sizeof(struct t10_alua_lu_gp_member), | |
147 | __alignof__(struct t10_alua_lu_gp_member), 0, NULL); | |
6708bb27 AG |
148 | if (!t10_alua_lu_gp_mem_cache) { |
149 | pr_err("kmem_cache_create() for t10_alua_lu_gp_mem_" | |
c66ac9db NB |
150 | "cache failed\n"); |
151 | goto out; | |
152 | } | |
153 | t10_alua_tg_pt_gp_cache = kmem_cache_create("t10_alua_tg_pt_gp_cache", | |
154 | sizeof(struct t10_alua_tg_pt_gp), | |
155 | __alignof__(struct t10_alua_tg_pt_gp), 0, NULL); | |
6708bb27 AG |
156 | if (!t10_alua_tg_pt_gp_cache) { |
157 | pr_err("kmem_cache_create() for t10_alua_tg_pt_gp_" | |
c66ac9db NB |
158 | "cache failed\n"); |
159 | goto out; | |
160 | } | |
161 | t10_alua_tg_pt_gp_mem_cache = kmem_cache_create( | |
162 | "t10_alua_tg_pt_gp_mem_cache", | |
163 | sizeof(struct t10_alua_tg_pt_gp_member), | |
164 | __alignof__(struct t10_alua_tg_pt_gp_member), | |
165 | 0, NULL); | |
6708bb27 AG |
166 | if (!t10_alua_tg_pt_gp_mem_cache) { |
167 | pr_err("kmem_cache_create() for t10_alua_tg_pt_gp_" | |
c66ac9db NB |
168 | "mem_t failed\n"); |
169 | goto out; | |
170 | } | |
171 | ||
c66ac9db NB |
172 | return 0; |
173 | out: | |
174 | if (se_cmd_cache) | |
175 | kmem_cache_destroy(se_cmd_cache); | |
176 | if (se_tmr_req_cache) | |
177 | kmem_cache_destroy(se_tmr_req_cache); | |
178 | if (se_sess_cache) | |
179 | kmem_cache_destroy(se_sess_cache); | |
180 | if (se_ua_cache) | |
181 | kmem_cache_destroy(se_ua_cache); | |
c66ac9db NB |
182 | if (t10_pr_reg_cache) |
183 | kmem_cache_destroy(t10_pr_reg_cache); | |
184 | if (t10_alua_lu_gp_cache) | |
185 | kmem_cache_destroy(t10_alua_lu_gp_cache); | |
186 | if (t10_alua_lu_gp_mem_cache) | |
187 | kmem_cache_destroy(t10_alua_lu_gp_mem_cache); | |
188 | if (t10_alua_tg_pt_gp_cache) | |
189 | kmem_cache_destroy(t10_alua_tg_pt_gp_cache); | |
190 | if (t10_alua_tg_pt_gp_mem_cache) | |
191 | kmem_cache_destroy(t10_alua_tg_pt_gp_mem_cache); | |
e3d6f909 | 192 | return -ENOMEM; |
c66ac9db NB |
193 | } |
194 | ||
e3d6f909 | 195 | void release_se_kmem_caches(void) |
c66ac9db | 196 | { |
c66ac9db NB |
197 | kmem_cache_destroy(se_cmd_cache); |
198 | kmem_cache_destroy(se_tmr_req_cache); | |
199 | kmem_cache_destroy(se_sess_cache); | |
200 | kmem_cache_destroy(se_ua_cache); | |
c66ac9db NB |
201 | kmem_cache_destroy(t10_pr_reg_cache); |
202 | kmem_cache_destroy(t10_alua_lu_gp_cache); | |
203 | kmem_cache_destroy(t10_alua_lu_gp_mem_cache); | |
204 | kmem_cache_destroy(t10_alua_tg_pt_gp_cache); | |
205 | kmem_cache_destroy(t10_alua_tg_pt_gp_mem_cache); | |
c66ac9db NB |
206 | } |
207 | ||
e3d6f909 AG |
208 | /* This code ensures unique mib indexes are handed out. */ |
209 | static DEFINE_SPINLOCK(scsi_mib_index_lock); | |
210 | static u32 scsi_mib_index[SCSI_INDEX_TYPE_MAX]; | |
e89d15ee NB |
211 | |
212 | /* | |
213 | * Allocate a new row index for the entry type specified | |
214 | */ | |
215 | u32 scsi_get_new_index(scsi_index_t type) | |
216 | { | |
217 | u32 new_index; | |
218 | ||
e3d6f909 | 219 | BUG_ON((type < 0) || (type >= SCSI_INDEX_TYPE_MAX)); |
e89d15ee | 220 | |
e3d6f909 AG |
221 | spin_lock(&scsi_mib_index_lock); |
222 | new_index = ++scsi_mib_index[type]; | |
223 | spin_unlock(&scsi_mib_index_lock); | |
e89d15ee NB |
224 | |
225 | return new_index; | |
226 | } | |
227 | ||
c66ac9db NB |
228 | void transport_init_queue_obj(struct se_queue_obj *qobj) |
229 | { | |
230 | atomic_set(&qobj->queue_cnt, 0); | |
231 | INIT_LIST_HEAD(&qobj->qobj_list); | |
232 | init_waitqueue_head(&qobj->thread_wq); | |
233 | spin_lock_init(&qobj->cmd_queue_lock); | |
234 | } | |
235 | EXPORT_SYMBOL(transport_init_queue_obj); | |
236 | ||
237 | static int transport_subsystem_reqmods(void) | |
238 | { | |
239 | int ret; | |
240 | ||
241 | ret = request_module("target_core_iblock"); | |
242 | if (ret != 0) | |
6708bb27 | 243 | pr_err("Unable to load target_core_iblock\n"); |
c66ac9db NB |
244 | |
245 | ret = request_module("target_core_file"); | |
246 | if (ret != 0) | |
6708bb27 | 247 | pr_err("Unable to load target_core_file\n"); |
c66ac9db NB |
248 | |
249 | ret = request_module("target_core_pscsi"); | |
250 | if (ret != 0) | |
6708bb27 | 251 | pr_err("Unable to load target_core_pscsi\n"); |
c66ac9db NB |
252 | |
253 | ret = request_module("target_core_stgt"); | |
254 | if (ret != 0) | |
6708bb27 | 255 | pr_err("Unable to load target_core_stgt\n"); |
c66ac9db NB |
256 | |
257 | return 0; | |
258 | } | |
259 | ||
260 | int transport_subsystem_check_init(void) | |
261 | { | |
e3d6f909 AG |
262 | int ret; |
263 | ||
264 | if (sub_api_initialized) | |
c66ac9db NB |
265 | return 0; |
266 | /* | |
267 | * Request the loading of known TCM subsystem plugins.. | |
268 | */ | |
e3d6f909 AG |
269 | ret = transport_subsystem_reqmods(); |
270 | if (ret < 0) | |
271 | return ret; | |
c66ac9db | 272 | |
e3d6f909 | 273 | sub_api_initialized = 1; |
c66ac9db NB |
274 | return 0; |
275 | } | |
276 | ||
277 | struct se_session *transport_init_session(void) | |
278 | { | |
279 | struct se_session *se_sess; | |
280 | ||
281 | se_sess = kmem_cache_zalloc(se_sess_cache, GFP_KERNEL); | |
6708bb27 AG |
282 | if (!se_sess) { |
283 | pr_err("Unable to allocate struct se_session from" | |
c66ac9db NB |
284 | " se_sess_cache\n"); |
285 | return ERR_PTR(-ENOMEM); | |
286 | } | |
287 | INIT_LIST_HEAD(&se_sess->sess_list); | |
288 | INIT_LIST_HEAD(&se_sess->sess_acl_list); | |
c66ac9db NB |
289 | |
290 | return se_sess; | |
291 | } | |
292 | EXPORT_SYMBOL(transport_init_session); | |
293 | ||
294 | /* | |
295 | * Called with spin_lock_bh(&struct se_portal_group->session_lock called. | |
296 | */ | |
297 | void __transport_register_session( | |
298 | struct se_portal_group *se_tpg, | |
299 | struct se_node_acl *se_nacl, | |
300 | struct se_session *se_sess, | |
301 | void *fabric_sess_ptr) | |
302 | { | |
303 | unsigned char buf[PR_REG_ISID_LEN]; | |
304 | ||
305 | se_sess->se_tpg = se_tpg; | |
306 | se_sess->fabric_sess_ptr = fabric_sess_ptr; | |
307 | /* | |
308 | * Used by struct se_node_acl's under ConfigFS to locate active se_session-t | |
309 | * | |
310 | * Only set for struct se_session's that will actually be moving I/O. | |
311 | * eg: *NOT* discovery sessions. | |
312 | */ | |
313 | if (se_nacl) { | |
314 | /* | |
315 | * If the fabric module supports an ISID based TransportID, | |
316 | * save this value in binary from the fabric I_T Nexus now. | |
317 | */ | |
e3d6f909 | 318 | if (se_tpg->se_tpg_tfo->sess_get_initiator_sid != NULL) { |
c66ac9db | 319 | memset(&buf[0], 0, PR_REG_ISID_LEN); |
e3d6f909 | 320 | se_tpg->se_tpg_tfo->sess_get_initiator_sid(se_sess, |
c66ac9db NB |
321 | &buf[0], PR_REG_ISID_LEN); |
322 | se_sess->sess_bin_isid = get_unaligned_be64(&buf[0]); | |
323 | } | |
324 | spin_lock_irq(&se_nacl->nacl_sess_lock); | |
325 | /* | |
326 | * The se_nacl->nacl_sess pointer will be set to the | |
327 | * last active I_T Nexus for each struct se_node_acl. | |
328 | */ | |
329 | se_nacl->nacl_sess = se_sess; | |
330 | ||
331 | list_add_tail(&se_sess->sess_acl_list, | |
332 | &se_nacl->acl_sess_list); | |
333 | spin_unlock_irq(&se_nacl->nacl_sess_lock); | |
334 | } | |
335 | list_add_tail(&se_sess->sess_list, &se_tpg->tpg_sess_list); | |
336 | ||
6708bb27 | 337 | pr_debug("TARGET_CORE[%s]: Registered fabric_sess_ptr: %p\n", |
e3d6f909 | 338 | se_tpg->se_tpg_tfo->get_fabric_name(), se_sess->fabric_sess_ptr); |
c66ac9db NB |
339 | } |
340 | EXPORT_SYMBOL(__transport_register_session); | |
341 | ||
342 | void transport_register_session( | |
343 | struct se_portal_group *se_tpg, | |
344 | struct se_node_acl *se_nacl, | |
345 | struct se_session *se_sess, | |
346 | void *fabric_sess_ptr) | |
347 | { | |
348 | spin_lock_bh(&se_tpg->session_lock); | |
349 | __transport_register_session(se_tpg, se_nacl, se_sess, fabric_sess_ptr); | |
350 | spin_unlock_bh(&se_tpg->session_lock); | |
351 | } | |
352 | EXPORT_SYMBOL(transport_register_session); | |
353 | ||
354 | void transport_deregister_session_configfs(struct se_session *se_sess) | |
355 | { | |
356 | struct se_node_acl *se_nacl; | |
23388864 | 357 | unsigned long flags; |
c66ac9db NB |
358 | /* |
359 | * Used by struct se_node_acl's under ConfigFS to locate active struct se_session | |
360 | */ | |
361 | se_nacl = se_sess->se_node_acl; | |
6708bb27 | 362 | if (se_nacl) { |
23388864 | 363 | spin_lock_irqsave(&se_nacl->nacl_sess_lock, flags); |
c66ac9db NB |
364 | list_del(&se_sess->sess_acl_list); |
365 | /* | |
366 | * If the session list is empty, then clear the pointer. | |
367 | * Otherwise, set the struct se_session pointer from the tail | |
368 | * element of the per struct se_node_acl active session list. | |
369 | */ | |
370 | if (list_empty(&se_nacl->acl_sess_list)) | |
371 | se_nacl->nacl_sess = NULL; | |
372 | else { | |
373 | se_nacl->nacl_sess = container_of( | |
374 | se_nacl->acl_sess_list.prev, | |
375 | struct se_session, sess_acl_list); | |
376 | } | |
23388864 | 377 | spin_unlock_irqrestore(&se_nacl->nacl_sess_lock, flags); |
c66ac9db NB |
378 | } |
379 | } | |
380 | EXPORT_SYMBOL(transport_deregister_session_configfs); | |
381 | ||
382 | void transport_free_session(struct se_session *se_sess) | |
383 | { | |
384 | kmem_cache_free(se_sess_cache, se_sess); | |
385 | } | |
386 | EXPORT_SYMBOL(transport_free_session); | |
387 | ||
388 | void transport_deregister_session(struct se_session *se_sess) | |
389 | { | |
390 | struct se_portal_group *se_tpg = se_sess->se_tpg; | |
391 | struct se_node_acl *se_nacl; | |
e63a8e19 | 392 | unsigned long flags; |
c66ac9db | 393 | |
6708bb27 | 394 | if (!se_tpg) { |
c66ac9db NB |
395 | transport_free_session(se_sess); |
396 | return; | |
397 | } | |
c66ac9db | 398 | |
e63a8e19 | 399 | spin_lock_irqsave(&se_tpg->session_lock, flags); |
c66ac9db NB |
400 | list_del(&se_sess->sess_list); |
401 | se_sess->se_tpg = NULL; | |
402 | se_sess->fabric_sess_ptr = NULL; | |
e63a8e19 | 403 | spin_unlock_irqrestore(&se_tpg->session_lock, flags); |
c66ac9db NB |
404 | |
405 | /* | |
406 | * Determine if we need to do extra work for this initiator node's | |
407 | * struct se_node_acl if it had been previously dynamically generated. | |
408 | */ | |
409 | se_nacl = se_sess->se_node_acl; | |
6708bb27 | 410 | if (se_nacl) { |
e63a8e19 | 411 | spin_lock_irqsave(&se_tpg->acl_node_lock, flags); |
c66ac9db | 412 | if (se_nacl->dynamic_node_acl) { |
6708bb27 AG |
413 | if (!se_tpg->se_tpg_tfo->tpg_check_demo_mode_cache( |
414 | se_tpg)) { | |
c66ac9db NB |
415 | list_del(&se_nacl->acl_list); |
416 | se_tpg->num_node_acls--; | |
e63a8e19 | 417 | spin_unlock_irqrestore(&se_tpg->acl_node_lock, flags); |
c66ac9db NB |
418 | |
419 | core_tpg_wait_for_nacl_pr_ref(se_nacl); | |
c66ac9db | 420 | core_free_device_list_for_node(se_nacl, se_tpg); |
e3d6f909 | 421 | se_tpg->se_tpg_tfo->tpg_release_fabric_acl(se_tpg, |
c66ac9db | 422 | se_nacl); |
e63a8e19 | 423 | spin_lock_irqsave(&se_tpg->acl_node_lock, flags); |
c66ac9db NB |
424 | } |
425 | } | |
e63a8e19 | 426 | spin_unlock_irqrestore(&se_tpg->acl_node_lock, flags); |
c66ac9db NB |
427 | } |
428 | ||
429 | transport_free_session(se_sess); | |
430 | ||
6708bb27 | 431 | pr_debug("TARGET_CORE[%s]: Deregistered fabric_sess\n", |
e3d6f909 | 432 | se_tpg->se_tpg_tfo->get_fabric_name()); |
c66ac9db NB |
433 | } |
434 | EXPORT_SYMBOL(transport_deregister_session); | |
435 | ||
436 | /* | |
a1d8b49a | 437 | * Called with cmd->t_state_lock held. |
c66ac9db NB |
438 | */ |
439 | static void transport_all_task_dev_remove_state(struct se_cmd *cmd) | |
440 | { | |
441 | struct se_device *dev; | |
442 | struct se_task *task; | |
443 | unsigned long flags; | |
444 | ||
a1d8b49a | 445 | list_for_each_entry(task, &cmd->t_task_list, t_list) { |
c66ac9db | 446 | dev = task->se_dev; |
6708bb27 | 447 | if (!dev) |
c66ac9db NB |
448 | continue; |
449 | ||
450 | if (atomic_read(&task->task_active)) | |
451 | continue; | |
452 | ||
6708bb27 | 453 | if (!atomic_read(&task->task_state_active)) |
c66ac9db NB |
454 | continue; |
455 | ||
456 | spin_lock_irqsave(&dev->execute_task_lock, flags); | |
457 | list_del(&task->t_state_list); | |
6708bb27 AG |
458 | pr_debug("Removed ITT: 0x%08x dev: %p task[%p]\n", |
459 | cmd->se_tfo->get_task_tag(cmd), dev, task); | |
c66ac9db NB |
460 | spin_unlock_irqrestore(&dev->execute_task_lock, flags); |
461 | ||
462 | atomic_set(&task->task_state_active, 0); | |
a1d8b49a | 463 | atomic_dec(&cmd->t_task_cdbs_ex_left); |
c66ac9db NB |
464 | } |
465 | } | |
466 | ||
467 | /* transport_cmd_check_stop(): | |
468 | * | |
469 | * 'transport_off = 1' determines if t_transport_active should be cleared. | |
470 | * 'transport_off = 2' determines if task_dev_state should be removed. | |
471 | * | |
472 | * A non-zero u8 t_state sets cmd->t_state. | |
473 | * Returns 1 when command is stopped, else 0. | |
474 | */ | |
475 | static int transport_cmd_check_stop( | |
476 | struct se_cmd *cmd, | |
477 | int transport_off, | |
478 | u8 t_state) | |
479 | { | |
480 | unsigned long flags; | |
481 | ||
a1d8b49a | 482 | spin_lock_irqsave(&cmd->t_state_lock, flags); |
c66ac9db NB |
483 | /* |
484 | * Determine if IOCTL context caller in requesting the stopping of this | |
485 | * command for LUN shutdown purposes. | |
486 | */ | |
a1d8b49a | 487 | if (atomic_read(&cmd->transport_lun_stop)) { |
6708bb27 | 488 | pr_debug("%s:%d atomic_read(&cmd->transport_lun_stop)" |
c66ac9db | 489 | " == TRUE for ITT: 0x%08x\n", __func__, __LINE__, |
e3d6f909 | 490 | cmd->se_tfo->get_task_tag(cmd)); |
c66ac9db NB |
491 | |
492 | cmd->deferred_t_state = cmd->t_state; | |
493 | cmd->t_state = TRANSPORT_DEFERRED_CMD; | |
a1d8b49a | 494 | atomic_set(&cmd->t_transport_active, 0); |
c66ac9db NB |
495 | if (transport_off == 2) |
496 | transport_all_task_dev_remove_state(cmd); | |
a1d8b49a | 497 | spin_unlock_irqrestore(&cmd->t_state_lock, flags); |
c66ac9db | 498 | |
a1d8b49a | 499 | complete(&cmd->transport_lun_stop_comp); |
c66ac9db NB |
500 | return 1; |
501 | } | |
502 | /* | |
503 | * Determine if frontend context caller is requesting the stopping of | |
e3d6f909 | 504 | * this command for frontend exceptions. |
c66ac9db | 505 | */ |
a1d8b49a | 506 | if (atomic_read(&cmd->t_transport_stop)) { |
6708bb27 | 507 | pr_debug("%s:%d atomic_read(&cmd->t_transport_stop) ==" |
c66ac9db | 508 | " TRUE for ITT: 0x%08x\n", __func__, __LINE__, |
e3d6f909 | 509 | cmd->se_tfo->get_task_tag(cmd)); |
c66ac9db NB |
510 | |
511 | cmd->deferred_t_state = cmd->t_state; | |
512 | cmd->t_state = TRANSPORT_DEFERRED_CMD; | |
513 | if (transport_off == 2) | |
514 | transport_all_task_dev_remove_state(cmd); | |
515 | ||
516 | /* | |
517 | * Clear struct se_cmd->se_lun before the transport_off == 2 handoff | |
518 | * to FE. | |
519 | */ | |
520 | if (transport_off == 2) | |
521 | cmd->se_lun = NULL; | |
a1d8b49a | 522 | spin_unlock_irqrestore(&cmd->t_state_lock, flags); |
c66ac9db | 523 | |
a1d8b49a | 524 | complete(&cmd->t_transport_stop_comp); |
c66ac9db NB |
525 | return 1; |
526 | } | |
527 | if (transport_off) { | |
a1d8b49a | 528 | atomic_set(&cmd->t_transport_active, 0); |
c66ac9db NB |
529 | if (transport_off == 2) { |
530 | transport_all_task_dev_remove_state(cmd); | |
531 | /* | |
532 | * Clear struct se_cmd->se_lun before the transport_off == 2 | |
533 | * handoff to fabric module. | |
534 | */ | |
535 | cmd->se_lun = NULL; | |
536 | /* | |
537 | * Some fabric modules like tcm_loop can release | |
25985edc | 538 | * their internally allocated I/O reference now and |
c66ac9db NB |
539 | * struct se_cmd now. |
540 | */ | |
e3d6f909 | 541 | if (cmd->se_tfo->check_stop_free != NULL) { |
c66ac9db | 542 | spin_unlock_irqrestore( |
a1d8b49a | 543 | &cmd->t_state_lock, flags); |
c66ac9db | 544 | |
e3d6f909 | 545 | cmd->se_tfo->check_stop_free(cmd); |
c66ac9db NB |
546 | return 1; |
547 | } | |
548 | } | |
a1d8b49a | 549 | spin_unlock_irqrestore(&cmd->t_state_lock, flags); |
c66ac9db NB |
550 | |
551 | return 0; | |
552 | } else if (t_state) | |
553 | cmd->t_state = t_state; | |
a1d8b49a | 554 | spin_unlock_irqrestore(&cmd->t_state_lock, flags); |
c66ac9db NB |
555 | |
556 | return 0; | |
557 | } | |
558 | ||
559 | static int transport_cmd_check_stop_to_fabric(struct se_cmd *cmd) | |
560 | { | |
561 | return transport_cmd_check_stop(cmd, 2, 0); | |
562 | } | |
563 | ||
564 | static void transport_lun_remove_cmd(struct se_cmd *cmd) | |
565 | { | |
e3d6f909 | 566 | struct se_lun *lun = cmd->se_lun; |
c66ac9db NB |
567 | unsigned long flags; |
568 | ||
569 | if (!lun) | |
570 | return; | |
571 | ||
a1d8b49a | 572 | spin_lock_irqsave(&cmd->t_state_lock, flags); |
6708bb27 | 573 | if (!atomic_read(&cmd->transport_dev_active)) { |
a1d8b49a | 574 | spin_unlock_irqrestore(&cmd->t_state_lock, flags); |
c66ac9db NB |
575 | goto check_lun; |
576 | } | |
a1d8b49a | 577 | atomic_set(&cmd->transport_dev_active, 0); |
c66ac9db | 578 | transport_all_task_dev_remove_state(cmd); |
a1d8b49a | 579 | spin_unlock_irqrestore(&cmd->t_state_lock, flags); |
c66ac9db | 580 | |
c66ac9db NB |
581 | |
582 | check_lun: | |
583 | spin_lock_irqsave(&lun->lun_cmd_lock, flags); | |
a1d8b49a | 584 | if (atomic_read(&cmd->transport_lun_active)) { |
5951146d | 585 | list_del(&cmd->se_lun_node); |
a1d8b49a | 586 | atomic_set(&cmd->transport_lun_active, 0); |
c66ac9db | 587 | #if 0 |
6708bb27 | 588 | pr_debug("Removed ITT: 0x%08x from LUN LIST[%d]\n" |
e3d6f909 | 589 | cmd->se_tfo->get_task_tag(cmd), lun->unpacked_lun); |
c66ac9db NB |
590 | #endif |
591 | } | |
592 | spin_unlock_irqrestore(&lun->lun_cmd_lock, flags); | |
593 | } | |
594 | ||
595 | void transport_cmd_finish_abort(struct se_cmd *cmd, int remove) | |
596 | { | |
5951146d | 597 | transport_remove_cmd_from_queue(cmd, &cmd->se_dev->dev_queue_obj); |
c66ac9db NB |
598 | transport_lun_remove_cmd(cmd); |
599 | ||
600 | if (transport_cmd_check_stop_to_fabric(cmd)) | |
601 | return; | |
602 | if (remove) | |
35462975 | 603 | transport_generic_remove(cmd, 0); |
c66ac9db NB |
604 | } |
605 | ||
606 | void transport_cmd_finish_abort_tmr(struct se_cmd *cmd) | |
607 | { | |
5951146d | 608 | transport_remove_cmd_from_queue(cmd, &cmd->se_dev->dev_queue_obj); |
c66ac9db NB |
609 | |
610 | if (transport_cmd_check_stop_to_fabric(cmd)) | |
611 | return; | |
612 | ||
35462975 | 613 | transport_generic_remove(cmd, 0); |
c66ac9db NB |
614 | } |
615 | ||
5951146d | 616 | static void transport_add_cmd_to_queue( |
c66ac9db NB |
617 | struct se_cmd *cmd, |
618 | int t_state) | |
619 | { | |
620 | struct se_device *dev = cmd->se_dev; | |
e3d6f909 | 621 | struct se_queue_obj *qobj = &dev->dev_queue_obj; |
c66ac9db NB |
622 | unsigned long flags; |
623 | ||
5951146d | 624 | INIT_LIST_HEAD(&cmd->se_queue_node); |
c66ac9db NB |
625 | |
626 | if (t_state) { | |
a1d8b49a | 627 | spin_lock_irqsave(&cmd->t_state_lock, flags); |
c66ac9db | 628 | cmd->t_state = t_state; |
a1d8b49a AG |
629 | atomic_set(&cmd->t_transport_active, 1); |
630 | spin_unlock_irqrestore(&cmd->t_state_lock, flags); | |
c66ac9db NB |
631 | } |
632 | ||
633 | spin_lock_irqsave(&qobj->cmd_queue_lock, flags); | |
07bde79a NB |
634 | if (cmd->se_cmd_flags & SCF_EMULATE_QUEUE_FULL) { |
635 | cmd->se_cmd_flags &= ~SCF_EMULATE_QUEUE_FULL; | |
636 | list_add(&cmd->se_queue_node, &qobj->qobj_list); | |
637 | } else | |
638 | list_add_tail(&cmd->se_queue_node, &qobj->qobj_list); | |
a1d8b49a | 639 | atomic_inc(&cmd->t_transport_queue_active); |
c66ac9db NB |
640 | spin_unlock_irqrestore(&qobj->cmd_queue_lock, flags); |
641 | ||
642 | atomic_inc(&qobj->queue_cnt); | |
643 | wake_up_interruptible(&qobj->thread_wq); | |
c66ac9db NB |
644 | } |
645 | ||
5951146d AG |
646 | static struct se_cmd * |
647 | transport_get_cmd_from_queue(struct se_queue_obj *qobj) | |
c66ac9db | 648 | { |
5951146d | 649 | struct se_cmd *cmd; |
c66ac9db NB |
650 | unsigned long flags; |
651 | ||
652 | spin_lock_irqsave(&qobj->cmd_queue_lock, flags); | |
653 | if (list_empty(&qobj->qobj_list)) { | |
654 | spin_unlock_irqrestore(&qobj->cmd_queue_lock, flags); | |
655 | return NULL; | |
656 | } | |
5951146d | 657 | cmd = list_first_entry(&qobj->qobj_list, struct se_cmd, se_queue_node); |
c66ac9db | 658 | |
a1d8b49a | 659 | atomic_dec(&cmd->t_transport_queue_active); |
c66ac9db | 660 | |
5951146d | 661 | list_del(&cmd->se_queue_node); |
c66ac9db NB |
662 | atomic_dec(&qobj->queue_cnt); |
663 | spin_unlock_irqrestore(&qobj->cmd_queue_lock, flags); | |
664 | ||
5951146d | 665 | return cmd; |
c66ac9db NB |
666 | } |
667 | ||
668 | static void transport_remove_cmd_from_queue(struct se_cmd *cmd, | |
669 | struct se_queue_obj *qobj) | |
670 | { | |
5951146d | 671 | struct se_cmd *t; |
c66ac9db NB |
672 | unsigned long flags; |
673 | ||
674 | spin_lock_irqsave(&qobj->cmd_queue_lock, flags); | |
6708bb27 | 675 | if (!atomic_read(&cmd->t_transport_queue_active)) { |
c66ac9db NB |
676 | spin_unlock_irqrestore(&qobj->cmd_queue_lock, flags); |
677 | return; | |
678 | } | |
679 | ||
5951146d AG |
680 | list_for_each_entry(t, &qobj->qobj_list, se_queue_node) |
681 | if (t == cmd) { | |
a1d8b49a | 682 | atomic_dec(&cmd->t_transport_queue_active); |
5951146d AG |
683 | atomic_dec(&qobj->queue_cnt); |
684 | list_del(&cmd->se_queue_node); | |
685 | break; | |
686 | } | |
c66ac9db NB |
687 | spin_unlock_irqrestore(&qobj->cmd_queue_lock, flags); |
688 | ||
a1d8b49a | 689 | if (atomic_read(&cmd->t_transport_queue_active)) { |
6708bb27 | 690 | pr_err("ITT: 0x%08x t_transport_queue_active: %d\n", |
e3d6f909 | 691 | cmd->se_tfo->get_task_tag(cmd), |
a1d8b49a | 692 | atomic_read(&cmd->t_transport_queue_active)); |
c66ac9db NB |
693 | } |
694 | } | |
695 | ||
696 | /* | |
697 | * Completion function used by TCM subsystem plugins (such as FILEIO) | |
698 | * for queueing up response from struct se_subsystem_api->do_task() | |
699 | */ | |
700 | void transport_complete_sync_cache(struct se_cmd *cmd, int good) | |
701 | { | |
a1d8b49a | 702 | struct se_task *task = list_entry(cmd->t_task_list.next, |
c66ac9db NB |
703 | struct se_task, t_list); |
704 | ||
705 | if (good) { | |
706 | cmd->scsi_status = SAM_STAT_GOOD; | |
707 | task->task_scsi_status = GOOD; | |
708 | } else { | |
709 | task->task_scsi_status = SAM_STAT_CHECK_CONDITION; | |
710 | task->task_error_status = PYX_TRANSPORT_ILLEGAL_REQUEST; | |
e3d6f909 | 711 | task->task_se_cmd->transport_error_status = |
c66ac9db NB |
712 | PYX_TRANSPORT_ILLEGAL_REQUEST; |
713 | } | |
714 | ||
715 | transport_complete_task(task, good); | |
716 | } | |
717 | EXPORT_SYMBOL(transport_complete_sync_cache); | |
718 | ||
719 | /* transport_complete_task(): | |
720 | * | |
721 | * Called from interrupt and non interrupt context depending | |
722 | * on the transport plugin. | |
723 | */ | |
724 | void transport_complete_task(struct se_task *task, int success) | |
725 | { | |
e3d6f909 | 726 | struct se_cmd *cmd = task->task_se_cmd; |
c66ac9db NB |
727 | struct se_device *dev = task->se_dev; |
728 | int t_state; | |
729 | unsigned long flags; | |
730 | #if 0 | |
6708bb27 | 731 | pr_debug("task: %p CDB: 0x%02x obj_ptr: %p\n", task, |
a1d8b49a | 732 | cmd->t_task_cdb[0], dev); |
c66ac9db | 733 | #endif |
e3d6f909 | 734 | if (dev) |
c66ac9db | 735 | atomic_inc(&dev->depth_left); |
c66ac9db | 736 | |
a1d8b49a | 737 | spin_lock_irqsave(&cmd->t_state_lock, flags); |
c66ac9db NB |
738 | atomic_set(&task->task_active, 0); |
739 | ||
740 | /* | |
741 | * See if any sense data exists, if so set the TASK_SENSE flag. | |
742 | * Also check for any other post completion work that needs to be | |
743 | * done by the plugins. | |
744 | */ | |
745 | if (dev && dev->transport->transport_complete) { | |
746 | if (dev->transport->transport_complete(task) != 0) { | |
747 | cmd->se_cmd_flags |= SCF_TRANSPORT_TASK_SENSE; | |
748 | task->task_sense = 1; | |
749 | success = 1; | |
750 | } | |
751 | } | |
752 | ||
753 | /* | |
754 | * See if we are waiting for outstanding struct se_task | |
755 | * to complete for an exception condition | |
756 | */ | |
757 | if (atomic_read(&task->task_stop)) { | |
758 | /* | |
a1d8b49a | 759 | * Decrement cmd->t_se_count if this task had |
c66ac9db NB |
760 | * previously thrown its timeout exception handler. |
761 | */ | |
762 | if (atomic_read(&task->task_timeout)) { | |
a1d8b49a | 763 | atomic_dec(&cmd->t_se_count); |
c66ac9db NB |
764 | atomic_set(&task->task_timeout, 0); |
765 | } | |
a1d8b49a | 766 | spin_unlock_irqrestore(&cmd->t_state_lock, flags); |
c66ac9db NB |
767 | |
768 | complete(&task->task_stop_comp); | |
769 | return; | |
770 | } | |
771 | /* | |
772 | * If the task's timeout handler has fired, use the t_task_cdbs_timeout | |
773 | * left counter to determine when the struct se_cmd is ready to be queued to | |
774 | * the processing thread. | |
775 | */ | |
776 | if (atomic_read(&task->task_timeout)) { | |
6708bb27 AG |
777 | if (!atomic_dec_and_test( |
778 | &cmd->t_task_cdbs_timeout_left)) { | |
a1d8b49a | 779 | spin_unlock_irqrestore(&cmd->t_state_lock, |
c66ac9db NB |
780 | flags); |
781 | return; | |
782 | } | |
783 | t_state = TRANSPORT_COMPLETE_TIMEOUT; | |
a1d8b49a | 784 | spin_unlock_irqrestore(&cmd->t_state_lock, flags); |
c66ac9db NB |
785 | |
786 | transport_add_cmd_to_queue(cmd, t_state); | |
787 | return; | |
788 | } | |
a1d8b49a | 789 | atomic_dec(&cmd->t_task_cdbs_timeout_left); |
c66ac9db NB |
790 | |
791 | /* | |
792 | * Decrement the outstanding t_task_cdbs_left count. The last | |
793 | * struct se_task from struct se_cmd will complete itself into the | |
794 | * device queue depending upon int success. | |
795 | */ | |
6708bb27 | 796 | if (!atomic_dec_and_test(&cmd->t_task_cdbs_left)) { |
c66ac9db | 797 | if (!success) |
a1d8b49a | 798 | cmd->t_tasks_failed = 1; |
c66ac9db | 799 | |
a1d8b49a | 800 | spin_unlock_irqrestore(&cmd->t_state_lock, flags); |
c66ac9db NB |
801 | return; |
802 | } | |
803 | ||
a1d8b49a | 804 | if (!success || cmd->t_tasks_failed) { |
c66ac9db NB |
805 | t_state = TRANSPORT_COMPLETE_FAILURE; |
806 | if (!task->task_error_status) { | |
807 | task->task_error_status = | |
808 | PYX_TRANSPORT_UNKNOWN_SAM_OPCODE; | |
809 | cmd->transport_error_status = | |
810 | PYX_TRANSPORT_UNKNOWN_SAM_OPCODE; | |
811 | } | |
812 | } else { | |
a1d8b49a | 813 | atomic_set(&cmd->t_transport_complete, 1); |
c66ac9db NB |
814 | t_state = TRANSPORT_COMPLETE_OK; |
815 | } | |
a1d8b49a | 816 | spin_unlock_irqrestore(&cmd->t_state_lock, flags); |
c66ac9db NB |
817 | |
818 | transport_add_cmd_to_queue(cmd, t_state); | |
819 | } | |
820 | EXPORT_SYMBOL(transport_complete_task); | |
821 | ||
822 | /* | |
823 | * Called by transport_add_tasks_from_cmd() once a struct se_cmd's | |
824 | * struct se_task list are ready to be added to the active execution list | |
825 | * struct se_device | |
826 | ||
827 | * Called with se_dev_t->execute_task_lock called. | |
828 | */ | |
829 | static inline int transport_add_task_check_sam_attr( | |
830 | struct se_task *task, | |
831 | struct se_task *task_prev, | |
832 | struct se_device *dev) | |
833 | { | |
834 | /* | |
835 | * No SAM Task attribute emulation enabled, add to tail of | |
836 | * execution queue | |
837 | */ | |
838 | if (dev->dev_task_attr_type != SAM_TASK_ATTR_EMULATED) { | |
839 | list_add_tail(&task->t_execute_list, &dev->execute_task_list); | |
840 | return 0; | |
841 | } | |
842 | /* | |
843 | * HEAD_OF_QUEUE attribute for received CDB, which means | |
844 | * the first task that is associated with a struct se_cmd goes to | |
845 | * head of the struct se_device->execute_task_list, and task_prev | |
846 | * after that for each subsequent task | |
847 | */ | |
e66ecd50 | 848 | if (task->task_se_cmd->sam_task_attr == MSG_HEAD_TAG) { |
c66ac9db NB |
849 | list_add(&task->t_execute_list, |
850 | (task_prev != NULL) ? | |
851 | &task_prev->t_execute_list : | |
852 | &dev->execute_task_list); | |
853 | ||
6708bb27 | 854 | pr_debug("Set HEAD_OF_QUEUE for task CDB: 0x%02x" |
c66ac9db | 855 | " in execution queue\n", |
6708bb27 | 856 | task->task_se_cmd->t_task_cdb[0]); |
c66ac9db NB |
857 | return 1; |
858 | } | |
859 | /* | |
860 | * For ORDERED, SIMPLE or UNTAGGED attribute tasks once they have been | |
861 | * transitioned from Dermant -> Active state, and are added to the end | |
862 | * of the struct se_device->execute_task_list | |
863 | */ | |
864 | list_add_tail(&task->t_execute_list, &dev->execute_task_list); | |
865 | return 0; | |
866 | } | |
867 | ||
868 | /* __transport_add_task_to_execute_queue(): | |
869 | * | |
870 | * Called with se_dev_t->execute_task_lock called. | |
871 | */ | |
872 | static void __transport_add_task_to_execute_queue( | |
873 | struct se_task *task, | |
874 | struct se_task *task_prev, | |
875 | struct se_device *dev) | |
876 | { | |
877 | int head_of_queue; | |
878 | ||
879 | head_of_queue = transport_add_task_check_sam_attr(task, task_prev, dev); | |
880 | atomic_inc(&dev->execute_tasks); | |
881 | ||
882 | if (atomic_read(&task->task_state_active)) | |
883 | return; | |
884 | /* | |
885 | * Determine if this task needs to go to HEAD_OF_QUEUE for the | |
886 | * state list as well. Running with SAM Task Attribute emulation | |
887 | * will always return head_of_queue == 0 here | |
888 | */ | |
889 | if (head_of_queue) | |
890 | list_add(&task->t_state_list, (task_prev) ? | |
891 | &task_prev->t_state_list : | |
892 | &dev->state_task_list); | |
893 | else | |
894 | list_add_tail(&task->t_state_list, &dev->state_task_list); | |
895 | ||
896 | atomic_set(&task->task_state_active, 1); | |
897 | ||
6708bb27 | 898 | pr_debug("Added ITT: 0x%08x task[%p] to dev: %p\n", |
e3d6f909 | 899 | task->task_se_cmd->se_tfo->get_task_tag(task->task_se_cmd), |
c66ac9db NB |
900 | task, dev); |
901 | } | |
902 | ||
903 | static void transport_add_tasks_to_state_queue(struct se_cmd *cmd) | |
904 | { | |
905 | struct se_device *dev; | |
906 | struct se_task *task; | |
907 | unsigned long flags; | |
908 | ||
a1d8b49a AG |
909 | spin_lock_irqsave(&cmd->t_state_lock, flags); |
910 | list_for_each_entry(task, &cmd->t_task_list, t_list) { | |
c66ac9db NB |
911 | dev = task->se_dev; |
912 | ||
913 | if (atomic_read(&task->task_state_active)) | |
914 | continue; | |
915 | ||
916 | spin_lock(&dev->execute_task_lock); | |
917 | list_add_tail(&task->t_state_list, &dev->state_task_list); | |
918 | atomic_set(&task->task_state_active, 1); | |
919 | ||
6708bb27 AG |
920 | pr_debug("Added ITT: 0x%08x task[%p] to dev: %p\n", |
921 | task->task_se_cmd->se_tfo->get_task_tag( | |
c66ac9db NB |
922 | task->task_se_cmd), task, dev); |
923 | ||
924 | spin_unlock(&dev->execute_task_lock); | |
925 | } | |
a1d8b49a | 926 | spin_unlock_irqrestore(&cmd->t_state_lock, flags); |
c66ac9db NB |
927 | } |
928 | ||
929 | static void transport_add_tasks_from_cmd(struct se_cmd *cmd) | |
930 | { | |
5951146d | 931 | struct se_device *dev = cmd->se_dev; |
c66ac9db NB |
932 | struct se_task *task, *task_prev = NULL; |
933 | unsigned long flags; | |
934 | ||
935 | spin_lock_irqsave(&dev->execute_task_lock, flags); | |
a1d8b49a | 936 | list_for_each_entry(task, &cmd->t_task_list, t_list) { |
c66ac9db NB |
937 | if (atomic_read(&task->task_execute_queue)) |
938 | continue; | |
939 | /* | |
940 | * __transport_add_task_to_execute_queue() handles the | |
941 | * SAM Task Attribute emulation if enabled | |
942 | */ | |
943 | __transport_add_task_to_execute_queue(task, task_prev, dev); | |
944 | atomic_set(&task->task_execute_queue, 1); | |
945 | task_prev = task; | |
946 | } | |
947 | spin_unlock_irqrestore(&dev->execute_task_lock, flags); | |
c66ac9db NB |
948 | } |
949 | ||
950 | /* transport_remove_task_from_execute_queue(): | |
951 | * | |
952 | * | |
953 | */ | |
52208ae3 | 954 | void transport_remove_task_from_execute_queue( |
c66ac9db NB |
955 | struct se_task *task, |
956 | struct se_device *dev) | |
957 | { | |
958 | unsigned long flags; | |
959 | ||
af57c3ac NB |
960 | if (atomic_read(&task->task_execute_queue) == 0) { |
961 | dump_stack(); | |
962 | return; | |
963 | } | |
964 | ||
c66ac9db NB |
965 | spin_lock_irqsave(&dev->execute_task_lock, flags); |
966 | list_del(&task->t_execute_list); | |
af57c3ac | 967 | atomic_set(&task->task_execute_queue, 0); |
c66ac9db NB |
968 | atomic_dec(&dev->execute_tasks); |
969 | spin_unlock_irqrestore(&dev->execute_task_lock, flags); | |
970 | } | |
971 | ||
07bde79a NB |
972 | /* |
973 | * Handle QUEUE_FULL / -EAGAIN status | |
974 | */ | |
975 | ||
976 | static void target_qf_do_work(struct work_struct *work) | |
977 | { | |
978 | struct se_device *dev = container_of(work, struct se_device, | |
979 | qf_work_queue); | |
980 | struct se_cmd *cmd, *cmd_tmp; | |
981 | ||
982 | spin_lock_irq(&dev->qf_cmd_lock); | |
983 | list_for_each_entry_safe(cmd, cmd_tmp, &dev->qf_cmd_list, se_qf_node) { | |
984 | ||
985 | list_del(&cmd->se_qf_node); | |
986 | atomic_dec(&dev->dev_qf_count); | |
987 | smp_mb__after_atomic_dec(); | |
988 | spin_unlock_irq(&dev->qf_cmd_lock); | |
989 | ||
6708bb27 | 990 | pr_debug("Processing %s cmd: %p QUEUE_FULL in work queue" |
07bde79a NB |
991 | " context: %s\n", cmd->se_tfo->get_fabric_name(), cmd, |
992 | (cmd->t_state == TRANSPORT_COMPLETE_OK) ? "COMPLETE_OK" : | |
993 | (cmd->t_state == TRANSPORT_COMPLETE_QF_WP) ? "WRITE_PENDING" | |
994 | : "UNKNOWN"); | |
995 | /* | |
996 | * The SCF_EMULATE_QUEUE_FULL flag will be cleared once se_cmd | |
997 | * has been added to head of queue | |
998 | */ | |
999 | transport_add_cmd_to_queue(cmd, cmd->t_state); | |
1000 | ||
1001 | spin_lock_irq(&dev->qf_cmd_lock); | |
1002 | } | |
1003 | spin_unlock_irq(&dev->qf_cmd_lock); | |
1004 | } | |
1005 | ||
c66ac9db NB |
1006 | unsigned char *transport_dump_cmd_direction(struct se_cmd *cmd) |
1007 | { | |
1008 | switch (cmd->data_direction) { | |
1009 | case DMA_NONE: | |
1010 | return "NONE"; | |
1011 | case DMA_FROM_DEVICE: | |
1012 | return "READ"; | |
1013 | case DMA_TO_DEVICE: | |
1014 | return "WRITE"; | |
1015 | case DMA_BIDIRECTIONAL: | |
1016 | return "BIDI"; | |
1017 | default: | |
1018 | break; | |
1019 | } | |
1020 | ||
1021 | return "UNKNOWN"; | |
1022 | } | |
1023 | ||
1024 | void transport_dump_dev_state( | |
1025 | struct se_device *dev, | |
1026 | char *b, | |
1027 | int *bl) | |
1028 | { | |
1029 | *bl += sprintf(b + *bl, "Status: "); | |
1030 | switch (dev->dev_status) { | |
1031 | case TRANSPORT_DEVICE_ACTIVATED: | |
1032 | *bl += sprintf(b + *bl, "ACTIVATED"); | |
1033 | break; | |
1034 | case TRANSPORT_DEVICE_DEACTIVATED: | |
1035 | *bl += sprintf(b + *bl, "DEACTIVATED"); | |
1036 | break; | |
1037 | case TRANSPORT_DEVICE_SHUTDOWN: | |
1038 | *bl += sprintf(b + *bl, "SHUTDOWN"); | |
1039 | break; | |
1040 | case TRANSPORT_DEVICE_OFFLINE_ACTIVATED: | |
1041 | case TRANSPORT_DEVICE_OFFLINE_DEACTIVATED: | |
1042 | *bl += sprintf(b + *bl, "OFFLINE"); | |
1043 | break; | |
1044 | default: | |
1045 | *bl += sprintf(b + *bl, "UNKNOWN=%d", dev->dev_status); | |
1046 | break; | |
1047 | } | |
1048 | ||
1049 | *bl += sprintf(b + *bl, " Execute/Left/Max Queue Depth: %d/%d/%d", | |
1050 | atomic_read(&dev->execute_tasks), atomic_read(&dev->depth_left), | |
1051 | dev->queue_depth); | |
1052 | *bl += sprintf(b + *bl, " SectorSize: %u MaxSectors: %u\n", | |
e3d6f909 | 1053 | dev->se_sub_dev->se_dev_attrib.block_size, dev->se_sub_dev->se_dev_attrib.max_sectors); |
c66ac9db NB |
1054 | *bl += sprintf(b + *bl, " "); |
1055 | } | |
1056 | ||
1057 | /* transport_release_all_cmds(): | |
1058 | * | |
1059 | * | |
1060 | */ | |
1061 | static void transport_release_all_cmds(struct se_device *dev) | |
1062 | { | |
5951146d | 1063 | struct se_cmd *cmd, *tcmd; |
c66ac9db NB |
1064 | int bug_out = 0, t_state; |
1065 | unsigned long flags; | |
1066 | ||
e3d6f909 | 1067 | spin_lock_irqsave(&dev->dev_queue_obj.cmd_queue_lock, flags); |
5951146d AG |
1068 | list_for_each_entry_safe(cmd, tcmd, &dev->dev_queue_obj.qobj_list, |
1069 | se_queue_node) { | |
1070 | t_state = cmd->t_state; | |
1071 | list_del(&cmd->se_queue_node); | |
e3d6f909 | 1072 | spin_unlock_irqrestore(&dev->dev_queue_obj.cmd_queue_lock, |
c66ac9db NB |
1073 | flags); |
1074 | ||
6708bb27 | 1075 | pr_err("Releasing ITT: 0x%08x, i_state: %u," |
c66ac9db | 1076 | " t_state: %u directly\n", |
e3d6f909 AG |
1077 | cmd->se_tfo->get_task_tag(cmd), |
1078 | cmd->se_tfo->get_cmd_state(cmd), t_state); | |
c66ac9db NB |
1079 | |
1080 | transport_release_fe_cmd(cmd); | |
1081 | bug_out = 1; | |
1082 | ||
e3d6f909 | 1083 | spin_lock_irqsave(&dev->dev_queue_obj.cmd_queue_lock, flags); |
c66ac9db | 1084 | } |
e3d6f909 | 1085 | spin_unlock_irqrestore(&dev->dev_queue_obj.cmd_queue_lock, flags); |
c66ac9db NB |
1086 | #if 0 |
1087 | if (bug_out) | |
1088 | BUG(); | |
1089 | #endif | |
1090 | } | |
1091 | ||
1092 | void transport_dump_vpd_proto_id( | |
1093 | struct t10_vpd *vpd, | |
1094 | unsigned char *p_buf, | |
1095 | int p_buf_len) | |
1096 | { | |
1097 | unsigned char buf[VPD_TMP_BUF_SIZE]; | |
1098 | int len; | |
1099 | ||
1100 | memset(buf, 0, VPD_TMP_BUF_SIZE); | |
1101 | len = sprintf(buf, "T10 VPD Protocol Identifier: "); | |
1102 | ||
1103 | switch (vpd->protocol_identifier) { | |
1104 | case 0x00: | |
1105 | sprintf(buf+len, "Fibre Channel\n"); | |
1106 | break; | |
1107 | case 0x10: | |
1108 | sprintf(buf+len, "Parallel SCSI\n"); | |
1109 | break; | |
1110 | case 0x20: | |
1111 | sprintf(buf+len, "SSA\n"); | |
1112 | break; | |
1113 | case 0x30: | |
1114 | sprintf(buf+len, "IEEE 1394\n"); | |
1115 | break; | |
1116 | case 0x40: | |
1117 | sprintf(buf+len, "SCSI Remote Direct Memory Access" | |
1118 | " Protocol\n"); | |
1119 | break; | |
1120 | case 0x50: | |
1121 | sprintf(buf+len, "Internet SCSI (iSCSI)\n"); | |
1122 | break; | |
1123 | case 0x60: | |
1124 | sprintf(buf+len, "SAS Serial SCSI Protocol\n"); | |
1125 | break; | |
1126 | case 0x70: | |
1127 | sprintf(buf+len, "Automation/Drive Interface Transport" | |
1128 | " Protocol\n"); | |
1129 | break; | |
1130 | case 0x80: | |
1131 | sprintf(buf+len, "AT Attachment Interface ATA/ATAPI\n"); | |
1132 | break; | |
1133 | default: | |
1134 | sprintf(buf+len, "Unknown 0x%02x\n", | |
1135 | vpd->protocol_identifier); | |
1136 | break; | |
1137 | } | |
1138 | ||
1139 | if (p_buf) | |
1140 | strncpy(p_buf, buf, p_buf_len); | |
1141 | else | |
6708bb27 | 1142 | pr_debug("%s", buf); |
c66ac9db NB |
1143 | } |
1144 | ||
1145 | void | |
1146 | transport_set_vpd_proto_id(struct t10_vpd *vpd, unsigned char *page_83) | |
1147 | { | |
1148 | /* | |
1149 | * Check if the Protocol Identifier Valid (PIV) bit is set.. | |
1150 | * | |
1151 | * from spc3r23.pdf section 7.5.1 | |
1152 | */ | |
1153 | if (page_83[1] & 0x80) { | |
1154 | vpd->protocol_identifier = (page_83[0] & 0xf0); | |
1155 | vpd->protocol_identifier_set = 1; | |
1156 | transport_dump_vpd_proto_id(vpd, NULL, 0); | |
1157 | } | |
1158 | } | |
1159 | EXPORT_SYMBOL(transport_set_vpd_proto_id); | |
1160 | ||
1161 | int transport_dump_vpd_assoc( | |
1162 | struct t10_vpd *vpd, | |
1163 | unsigned char *p_buf, | |
1164 | int p_buf_len) | |
1165 | { | |
1166 | unsigned char buf[VPD_TMP_BUF_SIZE]; | |
e3d6f909 AG |
1167 | int ret = 0; |
1168 | int len; | |
c66ac9db NB |
1169 | |
1170 | memset(buf, 0, VPD_TMP_BUF_SIZE); | |
1171 | len = sprintf(buf, "T10 VPD Identifier Association: "); | |
1172 | ||
1173 | switch (vpd->association) { | |
1174 | case 0x00: | |
1175 | sprintf(buf+len, "addressed logical unit\n"); | |
1176 | break; | |
1177 | case 0x10: | |
1178 | sprintf(buf+len, "target port\n"); | |
1179 | break; | |
1180 | case 0x20: | |
1181 | sprintf(buf+len, "SCSI target device\n"); | |
1182 | break; | |
1183 | default: | |
1184 | sprintf(buf+len, "Unknown 0x%02x\n", vpd->association); | |
e3d6f909 | 1185 | ret = -EINVAL; |
c66ac9db NB |
1186 | break; |
1187 | } | |
1188 | ||
1189 | if (p_buf) | |
1190 | strncpy(p_buf, buf, p_buf_len); | |
1191 | else | |
6708bb27 | 1192 | pr_debug("%s", buf); |
c66ac9db NB |
1193 | |
1194 | return ret; | |
1195 | } | |
1196 | ||
1197 | int transport_set_vpd_assoc(struct t10_vpd *vpd, unsigned char *page_83) | |
1198 | { | |
1199 | /* | |
1200 | * The VPD identification association.. | |
1201 | * | |
1202 | * from spc3r23.pdf Section 7.6.3.1 Table 297 | |
1203 | */ | |
1204 | vpd->association = (page_83[1] & 0x30); | |
1205 | return transport_dump_vpd_assoc(vpd, NULL, 0); | |
1206 | } | |
1207 | EXPORT_SYMBOL(transport_set_vpd_assoc); | |
1208 | ||
1209 | int transport_dump_vpd_ident_type( | |
1210 | struct t10_vpd *vpd, | |
1211 | unsigned char *p_buf, | |
1212 | int p_buf_len) | |
1213 | { | |
1214 | unsigned char buf[VPD_TMP_BUF_SIZE]; | |
e3d6f909 AG |
1215 | int ret = 0; |
1216 | int len; | |
c66ac9db NB |
1217 | |
1218 | memset(buf, 0, VPD_TMP_BUF_SIZE); | |
1219 | len = sprintf(buf, "T10 VPD Identifier Type: "); | |
1220 | ||
1221 | switch (vpd->device_identifier_type) { | |
1222 | case 0x00: | |
1223 | sprintf(buf+len, "Vendor specific\n"); | |
1224 | break; | |
1225 | case 0x01: | |
1226 | sprintf(buf+len, "T10 Vendor ID based\n"); | |
1227 | break; | |
1228 | case 0x02: | |
1229 | sprintf(buf+len, "EUI-64 based\n"); | |
1230 | break; | |
1231 | case 0x03: | |
1232 | sprintf(buf+len, "NAA\n"); | |
1233 | break; | |
1234 | case 0x04: | |
1235 | sprintf(buf+len, "Relative target port identifier\n"); | |
1236 | break; | |
1237 | case 0x08: | |
1238 | sprintf(buf+len, "SCSI name string\n"); | |
1239 | break; | |
1240 | default: | |
1241 | sprintf(buf+len, "Unsupported: 0x%02x\n", | |
1242 | vpd->device_identifier_type); | |
e3d6f909 | 1243 | ret = -EINVAL; |
c66ac9db NB |
1244 | break; |
1245 | } | |
1246 | ||
e3d6f909 AG |
1247 | if (p_buf) { |
1248 | if (p_buf_len < strlen(buf)+1) | |
1249 | return -EINVAL; | |
c66ac9db | 1250 | strncpy(p_buf, buf, p_buf_len); |
e3d6f909 | 1251 | } else { |
6708bb27 | 1252 | pr_debug("%s", buf); |
e3d6f909 | 1253 | } |
c66ac9db NB |
1254 | |
1255 | return ret; | |
1256 | } | |
1257 | ||
1258 | int transport_set_vpd_ident_type(struct t10_vpd *vpd, unsigned char *page_83) | |
1259 | { | |
1260 | /* | |
1261 | * The VPD identifier type.. | |
1262 | * | |
1263 | * from spc3r23.pdf Section 7.6.3.1 Table 298 | |
1264 | */ | |
1265 | vpd->device_identifier_type = (page_83[1] & 0x0f); | |
1266 | return transport_dump_vpd_ident_type(vpd, NULL, 0); | |
1267 | } | |
1268 | EXPORT_SYMBOL(transport_set_vpd_ident_type); | |
1269 | ||
1270 | int transport_dump_vpd_ident( | |
1271 | struct t10_vpd *vpd, | |
1272 | unsigned char *p_buf, | |
1273 | int p_buf_len) | |
1274 | { | |
1275 | unsigned char buf[VPD_TMP_BUF_SIZE]; | |
1276 | int ret = 0; | |
1277 | ||
1278 | memset(buf, 0, VPD_TMP_BUF_SIZE); | |
1279 | ||
1280 | switch (vpd->device_identifier_code_set) { | |
1281 | case 0x01: /* Binary */ | |
1282 | sprintf(buf, "T10 VPD Binary Device Identifier: %s\n", | |
1283 | &vpd->device_identifier[0]); | |
1284 | break; | |
1285 | case 0x02: /* ASCII */ | |
1286 | sprintf(buf, "T10 VPD ASCII Device Identifier: %s\n", | |
1287 | &vpd->device_identifier[0]); | |
1288 | break; | |
1289 | case 0x03: /* UTF-8 */ | |
1290 | sprintf(buf, "T10 VPD UTF-8 Device Identifier: %s\n", | |
1291 | &vpd->device_identifier[0]); | |
1292 | break; | |
1293 | default: | |
1294 | sprintf(buf, "T10 VPD Device Identifier encoding unsupported:" | |
1295 | " 0x%02x", vpd->device_identifier_code_set); | |
e3d6f909 | 1296 | ret = -EINVAL; |
c66ac9db NB |
1297 | break; |
1298 | } | |
1299 | ||
1300 | if (p_buf) | |
1301 | strncpy(p_buf, buf, p_buf_len); | |
1302 | else | |
6708bb27 | 1303 | pr_debug("%s", buf); |
c66ac9db NB |
1304 | |
1305 | return ret; | |
1306 | } | |
1307 | ||
1308 | int | |
1309 | transport_set_vpd_ident(struct t10_vpd *vpd, unsigned char *page_83) | |
1310 | { | |
1311 | static const char hex_str[] = "0123456789abcdef"; | |
1312 | int j = 0, i = 4; /* offset to start of the identifer */ | |
1313 | ||
1314 | /* | |
1315 | * The VPD Code Set (encoding) | |
1316 | * | |
1317 | * from spc3r23.pdf Section 7.6.3.1 Table 296 | |
1318 | */ | |
1319 | vpd->device_identifier_code_set = (page_83[0] & 0x0f); | |
1320 | switch (vpd->device_identifier_code_set) { | |
1321 | case 0x01: /* Binary */ | |
1322 | vpd->device_identifier[j++] = | |
1323 | hex_str[vpd->device_identifier_type]; | |
1324 | while (i < (4 + page_83[3])) { | |
1325 | vpd->device_identifier[j++] = | |
1326 | hex_str[(page_83[i] & 0xf0) >> 4]; | |
1327 | vpd->device_identifier[j++] = | |
1328 | hex_str[page_83[i] & 0x0f]; | |
1329 | i++; | |
1330 | } | |
1331 | break; | |
1332 | case 0x02: /* ASCII */ | |
1333 | case 0x03: /* UTF-8 */ | |
1334 | while (i < (4 + page_83[3])) | |
1335 | vpd->device_identifier[j++] = page_83[i++]; | |
1336 | break; | |
1337 | default: | |
1338 | break; | |
1339 | } | |
1340 | ||
1341 | return transport_dump_vpd_ident(vpd, NULL, 0); | |
1342 | } | |
1343 | EXPORT_SYMBOL(transport_set_vpd_ident); | |
1344 | ||
1345 | static void core_setup_task_attr_emulation(struct se_device *dev) | |
1346 | { | |
1347 | /* | |
1348 | * If this device is from Target_Core_Mod/pSCSI, disable the | |
1349 | * SAM Task Attribute emulation. | |
1350 | * | |
1351 | * This is currently not available in upsream Linux/SCSI Target | |
1352 | * mode code, and is assumed to be disabled while using TCM/pSCSI. | |
1353 | */ | |
e3d6f909 | 1354 | if (dev->transport->transport_type == TRANSPORT_PLUGIN_PHBA_PDEV) { |
c66ac9db NB |
1355 | dev->dev_task_attr_type = SAM_TASK_ATTR_PASSTHROUGH; |
1356 | return; | |
1357 | } | |
1358 | ||
1359 | dev->dev_task_attr_type = SAM_TASK_ATTR_EMULATED; | |
6708bb27 | 1360 | pr_debug("%s: Using SAM_TASK_ATTR_EMULATED for SPC: 0x%02x" |
e3d6f909 AG |
1361 | " device\n", dev->transport->name, |
1362 | dev->transport->get_device_rev(dev)); | |
c66ac9db NB |
1363 | } |
1364 | ||
1365 | static void scsi_dump_inquiry(struct se_device *dev) | |
1366 | { | |
e3d6f909 | 1367 | struct t10_wwn *wwn = &dev->se_sub_dev->t10_wwn; |
c66ac9db NB |
1368 | int i, device_type; |
1369 | /* | |
1370 | * Print Linux/SCSI style INQUIRY formatting to the kernel ring buffer | |
1371 | */ | |
6708bb27 | 1372 | pr_debug(" Vendor: "); |
c66ac9db NB |
1373 | for (i = 0; i < 8; i++) |
1374 | if (wwn->vendor[i] >= 0x20) | |
6708bb27 | 1375 | pr_debug("%c", wwn->vendor[i]); |
c66ac9db | 1376 | else |
6708bb27 | 1377 | pr_debug(" "); |
c66ac9db | 1378 | |
6708bb27 | 1379 | pr_debug(" Model: "); |
c66ac9db NB |
1380 | for (i = 0; i < 16; i++) |
1381 | if (wwn->model[i] >= 0x20) | |
6708bb27 | 1382 | pr_debug("%c", wwn->model[i]); |
c66ac9db | 1383 | else |
6708bb27 | 1384 | pr_debug(" "); |
c66ac9db | 1385 | |
6708bb27 | 1386 | pr_debug(" Revision: "); |
c66ac9db NB |
1387 | for (i = 0; i < 4; i++) |
1388 | if (wwn->revision[i] >= 0x20) | |
6708bb27 | 1389 | pr_debug("%c", wwn->revision[i]); |
c66ac9db | 1390 | else |
6708bb27 | 1391 | pr_debug(" "); |
c66ac9db | 1392 | |
6708bb27 | 1393 | pr_debug("\n"); |
c66ac9db | 1394 | |
e3d6f909 | 1395 | device_type = dev->transport->get_device_type(dev); |
6708bb27 AG |
1396 | pr_debug(" Type: %s ", scsi_device_type(device_type)); |
1397 | pr_debug(" ANSI SCSI revision: %02x\n", | |
e3d6f909 | 1398 | dev->transport->get_device_rev(dev)); |
c66ac9db NB |
1399 | } |
1400 | ||
1401 | struct se_device *transport_add_device_to_core_hba( | |
1402 | struct se_hba *hba, | |
1403 | struct se_subsystem_api *transport, | |
1404 | struct se_subsystem_dev *se_dev, | |
1405 | u32 device_flags, | |
1406 | void *transport_dev, | |
1407 | struct se_dev_limits *dev_limits, | |
1408 | const char *inquiry_prod, | |
1409 | const char *inquiry_rev) | |
1410 | { | |
12a18bdc | 1411 | int force_pt; |
c66ac9db NB |
1412 | struct se_device *dev; |
1413 | ||
1414 | dev = kzalloc(sizeof(struct se_device), GFP_KERNEL); | |
6708bb27 AG |
1415 | if (!dev) { |
1416 | pr_err("Unable to allocate memory for se_dev_t\n"); | |
c66ac9db NB |
1417 | return NULL; |
1418 | } | |
c66ac9db | 1419 | |
e3d6f909 | 1420 | transport_init_queue_obj(&dev->dev_queue_obj); |
c66ac9db NB |
1421 | dev->dev_flags = device_flags; |
1422 | dev->dev_status |= TRANSPORT_DEVICE_DEACTIVATED; | |
5951146d | 1423 | dev->dev_ptr = transport_dev; |
c66ac9db NB |
1424 | dev->se_hba = hba; |
1425 | dev->se_sub_dev = se_dev; | |
1426 | dev->transport = transport; | |
1427 | atomic_set(&dev->active_cmds, 0); | |
1428 | INIT_LIST_HEAD(&dev->dev_list); | |
1429 | INIT_LIST_HEAD(&dev->dev_sep_list); | |
1430 | INIT_LIST_HEAD(&dev->dev_tmr_list); | |
1431 | INIT_LIST_HEAD(&dev->execute_task_list); | |
1432 | INIT_LIST_HEAD(&dev->delayed_cmd_list); | |
1433 | INIT_LIST_HEAD(&dev->ordered_cmd_list); | |
1434 | INIT_LIST_HEAD(&dev->state_task_list); | |
07bde79a | 1435 | INIT_LIST_HEAD(&dev->qf_cmd_list); |
c66ac9db NB |
1436 | spin_lock_init(&dev->execute_task_lock); |
1437 | spin_lock_init(&dev->delayed_cmd_lock); | |
1438 | spin_lock_init(&dev->ordered_cmd_lock); | |
1439 | spin_lock_init(&dev->state_task_lock); | |
1440 | spin_lock_init(&dev->dev_alua_lock); | |
1441 | spin_lock_init(&dev->dev_reservation_lock); | |
1442 | spin_lock_init(&dev->dev_status_lock); | |
1443 | spin_lock_init(&dev->dev_status_thr_lock); | |
1444 | spin_lock_init(&dev->se_port_lock); | |
1445 | spin_lock_init(&dev->se_tmr_lock); | |
07bde79a | 1446 | spin_lock_init(&dev->qf_cmd_lock); |
c66ac9db NB |
1447 | |
1448 | dev->queue_depth = dev_limits->queue_depth; | |
1449 | atomic_set(&dev->depth_left, dev->queue_depth); | |
1450 | atomic_set(&dev->dev_ordered_id, 0); | |
1451 | ||
1452 | se_dev_set_default_attribs(dev, dev_limits); | |
1453 | ||
1454 | dev->dev_index = scsi_get_new_index(SCSI_DEVICE_INDEX); | |
1455 | dev->creation_time = get_jiffies_64(); | |
1456 | spin_lock_init(&dev->stats_lock); | |
1457 | ||
1458 | spin_lock(&hba->device_lock); | |
1459 | list_add_tail(&dev->dev_list, &hba->hba_dev_list); | |
1460 | hba->dev_count++; | |
1461 | spin_unlock(&hba->device_lock); | |
1462 | /* | |
1463 | * Setup the SAM Task Attribute emulation for struct se_device | |
1464 | */ | |
1465 | core_setup_task_attr_emulation(dev); | |
1466 | /* | |
1467 | * Force PR and ALUA passthrough emulation with internal object use. | |
1468 | */ | |
1469 | force_pt = (hba->hba_flags & HBA_FLAGS_INTERNAL_USE); | |
1470 | /* | |
1471 | * Setup the Reservations infrastructure for struct se_device | |
1472 | */ | |
1473 | core_setup_reservations(dev, force_pt); | |
1474 | /* | |
1475 | * Setup the Asymmetric Logical Unit Assignment for struct se_device | |
1476 | */ | |
1477 | if (core_setup_alua(dev, force_pt) < 0) | |
1478 | goto out; | |
1479 | ||
1480 | /* | |
1481 | * Startup the struct se_device processing thread | |
1482 | */ | |
1483 | dev->process_thread = kthread_run(transport_processing_thread, dev, | |
e3d6f909 | 1484 | "LIO_%s", dev->transport->name); |
c66ac9db | 1485 | if (IS_ERR(dev->process_thread)) { |
6708bb27 | 1486 | pr_err("Unable to create kthread: LIO_%s\n", |
e3d6f909 | 1487 | dev->transport->name); |
c66ac9db NB |
1488 | goto out; |
1489 | } | |
07bde79a NB |
1490 | /* |
1491 | * Setup work_queue for QUEUE_FULL | |
1492 | */ | |
1493 | INIT_WORK(&dev->qf_work_queue, target_qf_do_work); | |
c66ac9db NB |
1494 | /* |
1495 | * Preload the initial INQUIRY const values if we are doing | |
1496 | * anything virtual (IBLOCK, FILEIO, RAMDISK), but not for TCM/pSCSI | |
1497 | * passthrough because this is being provided by the backend LLD. | |
1498 | * This is required so that transport_get_inquiry() copies these | |
1499 | * originals once back into DEV_T10_WWN(dev) for the virtual device | |
1500 | * setup. | |
1501 | */ | |
e3d6f909 | 1502 | if (dev->transport->transport_type != TRANSPORT_PLUGIN_PHBA_PDEV) { |
f22c1196 | 1503 | if (!inquiry_prod || !inquiry_rev) { |
6708bb27 | 1504 | pr_err("All non TCM/pSCSI plugins require" |
c66ac9db NB |
1505 | " INQUIRY consts\n"); |
1506 | goto out; | |
1507 | } | |
1508 | ||
e3d6f909 AG |
1509 | strncpy(&dev->se_sub_dev->t10_wwn.vendor[0], "LIO-ORG", 8); |
1510 | strncpy(&dev->se_sub_dev->t10_wwn.model[0], inquiry_prod, 16); | |
1511 | strncpy(&dev->se_sub_dev->t10_wwn.revision[0], inquiry_rev, 4); | |
c66ac9db NB |
1512 | } |
1513 | scsi_dump_inquiry(dev); | |
1514 | ||
12a18bdc | 1515 | return dev; |
c66ac9db | 1516 | out: |
c66ac9db NB |
1517 | kthread_stop(dev->process_thread); |
1518 | ||
1519 | spin_lock(&hba->device_lock); | |
1520 | list_del(&dev->dev_list); | |
1521 | hba->dev_count--; | |
1522 | spin_unlock(&hba->device_lock); | |
1523 | ||
1524 | se_release_vpd_for_dev(dev); | |
1525 | ||
c66ac9db NB |
1526 | kfree(dev); |
1527 | ||
1528 | return NULL; | |
1529 | } | |
1530 | EXPORT_SYMBOL(transport_add_device_to_core_hba); | |
1531 | ||
1532 | /* transport_generic_prepare_cdb(): | |
1533 | * | |
1534 | * Since the Initiator sees iSCSI devices as LUNs, the SCSI CDB will | |
1535 | * contain the iSCSI LUN in bits 7-5 of byte 1 as per SAM-2. | |
1536 | * The point of this is since we are mapping iSCSI LUNs to | |
1537 | * SCSI Target IDs having a non-zero LUN in the CDB will throw the | |
1538 | * devices and HBAs for a loop. | |
1539 | */ | |
1540 | static inline void transport_generic_prepare_cdb( | |
1541 | unsigned char *cdb) | |
1542 | { | |
1543 | switch (cdb[0]) { | |
1544 | case READ_10: /* SBC - RDProtect */ | |
1545 | case READ_12: /* SBC - RDProtect */ | |
1546 | case READ_16: /* SBC - RDProtect */ | |
1547 | case SEND_DIAGNOSTIC: /* SPC - SELF-TEST Code */ | |
1548 | case VERIFY: /* SBC - VRProtect */ | |
1549 | case VERIFY_16: /* SBC - VRProtect */ | |
1550 | case WRITE_VERIFY: /* SBC - VRProtect */ | |
1551 | case WRITE_VERIFY_12: /* SBC - VRProtect */ | |
1552 | break; | |
1553 | default: | |
1554 | cdb[1] &= 0x1f; /* clear logical unit number */ | |
1555 | break; | |
1556 | } | |
1557 | } | |
1558 | ||
1559 | static struct se_task * | |
1560 | transport_generic_get_task(struct se_cmd *cmd, | |
1561 | enum dma_data_direction data_direction) | |
1562 | { | |
1563 | struct se_task *task; | |
5951146d | 1564 | struct se_device *dev = cmd->se_dev; |
c66ac9db | 1565 | |
6708bb27 | 1566 | task = dev->transport->alloc_task(cmd->t_task_cdb); |
c66ac9db | 1567 | if (!task) { |
6708bb27 | 1568 | pr_err("Unable to allocate struct se_task\n"); |
c66ac9db NB |
1569 | return NULL; |
1570 | } | |
1571 | ||
1572 | INIT_LIST_HEAD(&task->t_list); | |
1573 | INIT_LIST_HEAD(&task->t_execute_list); | |
1574 | INIT_LIST_HEAD(&task->t_state_list); | |
1575 | init_completion(&task->task_stop_comp); | |
c66ac9db NB |
1576 | task->task_se_cmd = cmd; |
1577 | task->se_dev = dev; | |
1578 | task->task_data_direction = data_direction; | |
1579 | ||
c66ac9db NB |
1580 | return task; |
1581 | } | |
1582 | ||
1583 | static int transport_generic_cmd_sequencer(struct se_cmd *, unsigned char *); | |
1584 | ||
c66ac9db NB |
1585 | /* |
1586 | * Used by fabric modules containing a local struct se_cmd within their | |
1587 | * fabric dependent per I/O descriptor. | |
1588 | */ | |
1589 | void transport_init_se_cmd( | |
1590 | struct se_cmd *cmd, | |
1591 | struct target_core_fabric_ops *tfo, | |
1592 | struct se_session *se_sess, | |
1593 | u32 data_length, | |
1594 | int data_direction, | |
1595 | int task_attr, | |
1596 | unsigned char *sense_buffer) | |
1597 | { | |
5951146d AG |
1598 | INIT_LIST_HEAD(&cmd->se_lun_node); |
1599 | INIT_LIST_HEAD(&cmd->se_delayed_node); | |
1600 | INIT_LIST_HEAD(&cmd->se_ordered_node); | |
07bde79a | 1601 | INIT_LIST_HEAD(&cmd->se_qf_node); |
c66ac9db | 1602 | |
a1d8b49a AG |
1603 | INIT_LIST_HEAD(&cmd->t_task_list); |
1604 | init_completion(&cmd->transport_lun_fe_stop_comp); | |
1605 | init_completion(&cmd->transport_lun_stop_comp); | |
1606 | init_completion(&cmd->t_transport_stop_comp); | |
1607 | spin_lock_init(&cmd->t_state_lock); | |
1608 | atomic_set(&cmd->transport_dev_active, 1); | |
c66ac9db NB |
1609 | |
1610 | cmd->se_tfo = tfo; | |
1611 | cmd->se_sess = se_sess; | |
1612 | cmd->data_length = data_length; | |
1613 | cmd->data_direction = data_direction; | |
1614 | cmd->sam_task_attr = task_attr; | |
1615 | cmd->sense_buffer = sense_buffer; | |
1616 | } | |
1617 | EXPORT_SYMBOL(transport_init_se_cmd); | |
1618 | ||
1619 | static int transport_check_alloc_task_attr(struct se_cmd *cmd) | |
1620 | { | |
1621 | /* | |
1622 | * Check if SAM Task Attribute emulation is enabled for this | |
1623 | * struct se_device storage object | |
1624 | */ | |
5951146d | 1625 | if (cmd->se_dev->dev_task_attr_type != SAM_TASK_ATTR_EMULATED) |
c66ac9db NB |
1626 | return 0; |
1627 | ||
e66ecd50 | 1628 | if (cmd->sam_task_attr == MSG_ACA_TAG) { |
6708bb27 | 1629 | pr_debug("SAM Task Attribute ACA" |
c66ac9db | 1630 | " emulation is not supported\n"); |
e3d6f909 | 1631 | return -EINVAL; |
c66ac9db NB |
1632 | } |
1633 | /* | |
1634 | * Used to determine when ORDERED commands should go from | |
1635 | * Dormant to Active status. | |
1636 | */ | |
5951146d | 1637 | cmd->se_ordered_id = atomic_inc_return(&cmd->se_dev->dev_ordered_id); |
c66ac9db | 1638 | smp_mb__after_atomic_inc(); |
6708bb27 | 1639 | pr_debug("Allocated se_ordered_id: %u for Task Attr: 0x%02x on %s\n", |
c66ac9db | 1640 | cmd->se_ordered_id, cmd->sam_task_attr, |
6708bb27 | 1641 | cmd->se_dev->transport->name); |
c66ac9db NB |
1642 | return 0; |
1643 | } | |
1644 | ||
1645 | void transport_free_se_cmd( | |
1646 | struct se_cmd *se_cmd) | |
1647 | { | |
1648 | if (se_cmd->se_tmr_req) | |
1649 | core_tmr_release_req(se_cmd->se_tmr_req); | |
1650 | /* | |
1651 | * Check and free any extended CDB buffer that was allocated | |
1652 | */ | |
a1d8b49a AG |
1653 | if (se_cmd->t_task_cdb != se_cmd->__t_task_cdb) |
1654 | kfree(se_cmd->t_task_cdb); | |
c66ac9db NB |
1655 | } |
1656 | EXPORT_SYMBOL(transport_free_se_cmd); | |
1657 | ||
1658 | static void transport_generic_wait_for_tasks(struct se_cmd *, int, int); | |
1659 | ||
1660 | /* transport_generic_allocate_tasks(): | |
1661 | * | |
1662 | * Called from fabric RX Thread. | |
1663 | */ | |
1664 | int transport_generic_allocate_tasks( | |
1665 | struct se_cmd *cmd, | |
1666 | unsigned char *cdb) | |
1667 | { | |
1668 | int ret; | |
1669 | ||
1670 | transport_generic_prepare_cdb(cdb); | |
1671 | ||
1672 | /* | |
1673 | * This is needed for early exceptions. | |
1674 | */ | |
1675 | cmd->transport_wait_for_tasks = &transport_generic_wait_for_tasks; | |
1676 | ||
c66ac9db NB |
1677 | /* |
1678 | * Ensure that the received CDB is less than the max (252 + 8) bytes | |
1679 | * for VARIABLE_LENGTH_CMD | |
1680 | */ | |
1681 | if (scsi_command_size(cdb) > SCSI_MAX_VARLEN_CDB_SIZE) { | |
6708bb27 | 1682 | pr_err("Received SCSI CDB with command_size: %d that" |
c66ac9db NB |
1683 | " exceeds SCSI_MAX_VARLEN_CDB_SIZE: %d\n", |
1684 | scsi_command_size(cdb), SCSI_MAX_VARLEN_CDB_SIZE); | |
e3d6f909 | 1685 | return -EINVAL; |
c66ac9db NB |
1686 | } |
1687 | /* | |
1688 | * If the received CDB is larger than TCM_MAX_COMMAND_SIZE, | |
1689 | * allocate the additional extended CDB buffer now.. Otherwise | |
1690 | * setup the pointer from __t_task_cdb to t_task_cdb. | |
1691 | */ | |
a1d8b49a AG |
1692 | if (scsi_command_size(cdb) > sizeof(cmd->__t_task_cdb)) { |
1693 | cmd->t_task_cdb = kzalloc(scsi_command_size(cdb), | |
c66ac9db | 1694 | GFP_KERNEL); |
6708bb27 AG |
1695 | if (!cmd->t_task_cdb) { |
1696 | pr_err("Unable to allocate cmd->t_task_cdb" | |
a1d8b49a | 1697 | " %u > sizeof(cmd->__t_task_cdb): %lu ops\n", |
c66ac9db | 1698 | scsi_command_size(cdb), |
a1d8b49a | 1699 | (unsigned long)sizeof(cmd->__t_task_cdb)); |
e3d6f909 | 1700 | return -ENOMEM; |
c66ac9db NB |
1701 | } |
1702 | } else | |
a1d8b49a | 1703 | cmd->t_task_cdb = &cmd->__t_task_cdb[0]; |
c66ac9db | 1704 | /* |
a1d8b49a | 1705 | * Copy the original CDB into cmd-> |
c66ac9db | 1706 | */ |
a1d8b49a | 1707 | memcpy(cmd->t_task_cdb, cdb, scsi_command_size(cdb)); |
c66ac9db NB |
1708 | /* |
1709 | * Setup the received CDB based on SCSI defined opcodes and | |
1710 | * perform unit attention, persistent reservations and ALUA | |
a1d8b49a | 1711 | * checks for virtual device backends. The cmd->t_task_cdb |
c66ac9db NB |
1712 | * pointer is expected to be setup before we reach this point. |
1713 | */ | |
1714 | ret = transport_generic_cmd_sequencer(cmd, cdb); | |
1715 | if (ret < 0) | |
1716 | return ret; | |
1717 | /* | |
1718 | * Check for SAM Task Attribute Emulation | |
1719 | */ | |
1720 | if (transport_check_alloc_task_attr(cmd) < 0) { | |
1721 | cmd->se_cmd_flags |= SCF_SCSI_CDB_EXCEPTION; | |
1722 | cmd->scsi_sense_reason = TCM_INVALID_CDB_FIELD; | |
5951146d | 1723 | return -EINVAL; |
c66ac9db NB |
1724 | } |
1725 | spin_lock(&cmd->se_lun->lun_sep_lock); | |
1726 | if (cmd->se_lun->lun_sep) | |
1727 | cmd->se_lun->lun_sep->sep_stats.cmd_pdus++; | |
1728 | spin_unlock(&cmd->se_lun->lun_sep_lock); | |
1729 | return 0; | |
1730 | } | |
1731 | EXPORT_SYMBOL(transport_generic_allocate_tasks); | |
1732 | ||
1733 | /* | |
1734 | * Used by fabric module frontends not defining a TFO->new_cmd_map() | |
1735 | * to queue up a newly setup se_cmd w/ TRANSPORT_NEW_CMD statis | |
1736 | */ | |
1737 | int transport_generic_handle_cdb( | |
1738 | struct se_cmd *cmd) | |
1739 | { | |
e3d6f909 | 1740 | if (!cmd->se_lun) { |
c66ac9db | 1741 | dump_stack(); |
6708bb27 | 1742 | pr_err("cmd->se_lun is NULL\n"); |
e3d6f909 | 1743 | return -EINVAL; |
c66ac9db | 1744 | } |
695434e1 | 1745 | |
c66ac9db NB |
1746 | transport_add_cmd_to_queue(cmd, TRANSPORT_NEW_CMD); |
1747 | return 0; | |
1748 | } | |
1749 | EXPORT_SYMBOL(transport_generic_handle_cdb); | |
1750 | ||
dd8ae59d NB |
1751 | static void transport_generic_request_failure(struct se_cmd *, |
1752 | struct se_device *, int, int); | |
695434e1 NB |
1753 | /* |
1754 | * Used by fabric module frontends to queue tasks directly. | |
1755 | * Many only be used from process context only | |
1756 | */ | |
1757 | int transport_handle_cdb_direct( | |
1758 | struct se_cmd *cmd) | |
1759 | { | |
dd8ae59d NB |
1760 | int ret; |
1761 | ||
695434e1 NB |
1762 | if (!cmd->se_lun) { |
1763 | dump_stack(); | |
6708bb27 | 1764 | pr_err("cmd->se_lun is NULL\n"); |
695434e1 NB |
1765 | return -EINVAL; |
1766 | } | |
1767 | if (in_interrupt()) { | |
1768 | dump_stack(); | |
6708bb27 | 1769 | pr_err("transport_generic_handle_cdb cannot be called" |
695434e1 NB |
1770 | " from interrupt context\n"); |
1771 | return -EINVAL; | |
1772 | } | |
dd8ae59d NB |
1773 | /* |
1774 | * Set TRANSPORT_NEW_CMD state and cmd->t_transport_active=1 following | |
1775 | * transport_generic_handle_cdb*() -> transport_add_cmd_to_queue() | |
1776 | * in existing usage to ensure that outstanding descriptors are handled | |
1777 | * correctly during shutdown via transport_generic_wait_for_tasks() | |
1778 | * | |
1779 | * Also, we don't take cmd->t_state_lock here as we only expect | |
1780 | * this to be called for initial descriptor submission. | |
1781 | */ | |
1782 | cmd->t_state = TRANSPORT_NEW_CMD; | |
1783 | atomic_set(&cmd->t_transport_active, 1); | |
1784 | /* | |
1785 | * transport_generic_new_cmd() is already handling QUEUE_FULL, | |
1786 | * so follow TRANSPORT_NEW_CMD processing thread context usage | |
1787 | * and call transport_generic_request_failure() if necessary.. | |
1788 | */ | |
1789 | ret = transport_generic_new_cmd(cmd); | |
1790 | if (ret == -EAGAIN) | |
1791 | return 0; | |
1792 | else if (ret < 0) { | |
1793 | cmd->transport_error_status = ret; | |
1794 | transport_generic_request_failure(cmd, NULL, 0, | |
1795 | (cmd->data_direction != DMA_TO_DEVICE)); | |
1796 | } | |
1797 | return 0; | |
695434e1 NB |
1798 | } |
1799 | EXPORT_SYMBOL(transport_handle_cdb_direct); | |
1800 | ||
c66ac9db NB |
1801 | /* |
1802 | * Used by fabric module frontends defining a TFO->new_cmd_map() caller | |
1803 | * to queue up a newly setup se_cmd w/ TRANSPORT_NEW_CMD_MAP in order to | |
1804 | * complete setup in TCM process context w/ TFO->new_cmd_map(). | |
1805 | */ | |
1806 | int transport_generic_handle_cdb_map( | |
1807 | struct se_cmd *cmd) | |
1808 | { | |
e3d6f909 | 1809 | if (!cmd->se_lun) { |
c66ac9db | 1810 | dump_stack(); |
6708bb27 | 1811 | pr_err("cmd->se_lun is NULL\n"); |
e3d6f909 | 1812 | return -EINVAL; |
c66ac9db NB |
1813 | } |
1814 | ||
1815 | transport_add_cmd_to_queue(cmd, TRANSPORT_NEW_CMD_MAP); | |
1816 | return 0; | |
1817 | } | |
1818 | EXPORT_SYMBOL(transport_generic_handle_cdb_map); | |
1819 | ||
1820 | /* transport_generic_handle_data(): | |
1821 | * | |
1822 | * | |
1823 | */ | |
1824 | int transport_generic_handle_data( | |
1825 | struct se_cmd *cmd) | |
1826 | { | |
1827 | /* | |
1828 | * For the software fabric case, then we assume the nexus is being | |
1829 | * failed/shutdown when signals are pending from the kthread context | |
1830 | * caller, so we return a failure. For the HW target mode case running | |
1831 | * in interrupt code, the signal_pending() check is skipped. | |
1832 | */ | |
1833 | if (!in_interrupt() && signal_pending(current)) | |
e3d6f909 | 1834 | return -EPERM; |
c66ac9db NB |
1835 | /* |
1836 | * If the received CDB has aleady been ABORTED by the generic | |
1837 | * target engine, we now call transport_check_aborted_status() | |
1838 | * to queue any delated TASK_ABORTED status for the received CDB to the | |
25985edc | 1839 | * fabric module as we are expecting no further incoming DATA OUT |
c66ac9db NB |
1840 | * sequences at this point. |
1841 | */ | |
1842 | if (transport_check_aborted_status(cmd, 1) != 0) | |
1843 | return 0; | |
1844 | ||
1845 | transport_add_cmd_to_queue(cmd, TRANSPORT_PROCESS_WRITE); | |
1846 | return 0; | |
1847 | } | |
1848 | EXPORT_SYMBOL(transport_generic_handle_data); | |
1849 | ||
1850 | /* transport_generic_handle_tmr(): | |
1851 | * | |
1852 | * | |
1853 | */ | |
1854 | int transport_generic_handle_tmr( | |
1855 | struct se_cmd *cmd) | |
1856 | { | |
1857 | /* | |
1858 | * This is needed for early exceptions. | |
1859 | */ | |
1860 | cmd->transport_wait_for_tasks = &transport_generic_wait_for_tasks; | |
c66ac9db NB |
1861 | |
1862 | transport_add_cmd_to_queue(cmd, TRANSPORT_PROCESS_TMR); | |
1863 | return 0; | |
1864 | } | |
1865 | EXPORT_SYMBOL(transport_generic_handle_tmr); | |
1866 | ||
f4366772 NB |
1867 | void transport_generic_free_cmd_intr( |
1868 | struct se_cmd *cmd) | |
1869 | { | |
1870 | transport_add_cmd_to_queue(cmd, TRANSPORT_FREE_CMD_INTR); | |
1871 | } | |
1872 | EXPORT_SYMBOL(transport_generic_free_cmd_intr); | |
1873 | ||
c66ac9db NB |
1874 | static int transport_stop_tasks_for_cmd(struct se_cmd *cmd) |
1875 | { | |
1876 | struct se_task *task, *task_tmp; | |
1877 | unsigned long flags; | |
1878 | int ret = 0; | |
1879 | ||
6708bb27 | 1880 | pr_debug("ITT[0x%08x] - Stopping tasks\n", |
e3d6f909 | 1881 | cmd->se_tfo->get_task_tag(cmd)); |
c66ac9db NB |
1882 | |
1883 | /* | |
1884 | * No tasks remain in the execution queue | |
1885 | */ | |
a1d8b49a | 1886 | spin_lock_irqsave(&cmd->t_state_lock, flags); |
c66ac9db | 1887 | list_for_each_entry_safe(task, task_tmp, |
a1d8b49a | 1888 | &cmd->t_task_list, t_list) { |
6708bb27 | 1889 | pr_debug("task_no[%d] - Processing task %p\n", |
c66ac9db NB |
1890 | task->task_no, task); |
1891 | /* | |
1892 | * If the struct se_task has not been sent and is not active, | |
1893 | * remove the struct se_task from the execution queue. | |
1894 | */ | |
1895 | if (!atomic_read(&task->task_sent) && | |
1896 | !atomic_read(&task->task_active)) { | |
a1d8b49a | 1897 | spin_unlock_irqrestore(&cmd->t_state_lock, |
c66ac9db NB |
1898 | flags); |
1899 | transport_remove_task_from_execute_queue(task, | |
1900 | task->se_dev); | |
1901 | ||
6708bb27 | 1902 | pr_debug("task_no[%d] - Removed from execute queue\n", |
c66ac9db | 1903 | task->task_no); |
a1d8b49a | 1904 | spin_lock_irqsave(&cmd->t_state_lock, flags); |
c66ac9db NB |
1905 | continue; |
1906 | } | |
1907 | ||
1908 | /* | |
1909 | * If the struct se_task is active, sleep until it is returned | |
1910 | * from the plugin. | |
1911 | */ | |
1912 | if (atomic_read(&task->task_active)) { | |
1913 | atomic_set(&task->task_stop, 1); | |
a1d8b49a | 1914 | spin_unlock_irqrestore(&cmd->t_state_lock, |
c66ac9db NB |
1915 | flags); |
1916 | ||
6708bb27 | 1917 | pr_debug("task_no[%d] - Waiting to complete\n", |
c66ac9db NB |
1918 | task->task_no); |
1919 | wait_for_completion(&task->task_stop_comp); | |
6708bb27 | 1920 | pr_debug("task_no[%d] - Stopped successfully\n", |
c66ac9db NB |
1921 | task->task_no); |
1922 | ||
a1d8b49a AG |
1923 | spin_lock_irqsave(&cmd->t_state_lock, flags); |
1924 | atomic_dec(&cmd->t_task_cdbs_left); | |
c66ac9db NB |
1925 | |
1926 | atomic_set(&task->task_active, 0); | |
1927 | atomic_set(&task->task_stop, 0); | |
1928 | } else { | |
6708bb27 | 1929 | pr_debug("task_no[%d] - Did nothing\n", task->task_no); |
c66ac9db NB |
1930 | ret++; |
1931 | } | |
1932 | ||
1933 | __transport_stop_task_timer(task, &flags); | |
1934 | } | |
a1d8b49a | 1935 | spin_unlock_irqrestore(&cmd->t_state_lock, flags); |
c66ac9db NB |
1936 | |
1937 | return ret; | |
1938 | } | |
1939 | ||
c66ac9db NB |
1940 | /* |
1941 | * Handle SAM-esque emulation for generic transport request failures. | |
1942 | */ | |
1943 | static void transport_generic_request_failure( | |
1944 | struct se_cmd *cmd, | |
1945 | struct se_device *dev, | |
1946 | int complete, | |
1947 | int sc) | |
1948 | { | |
07bde79a NB |
1949 | int ret = 0; |
1950 | ||
6708bb27 | 1951 | pr_debug("-----[ Storage Engine Exception for cmd: %p ITT: 0x%08x" |
e3d6f909 | 1952 | " CDB: 0x%02x\n", cmd, cmd->se_tfo->get_task_tag(cmd), |
a1d8b49a | 1953 | cmd->t_task_cdb[0]); |
6708bb27 | 1954 | pr_debug("-----[ i_state: %d t_state/def_t_state:" |
c66ac9db | 1955 | " %d/%d transport_error_status: %d\n", |
e3d6f909 | 1956 | cmd->se_tfo->get_cmd_state(cmd), |
c66ac9db NB |
1957 | cmd->t_state, cmd->deferred_t_state, |
1958 | cmd->transport_error_status); | |
6708bb27 | 1959 | pr_debug("-----[ t_tasks: %d t_task_cdbs_left: %d" |
c66ac9db NB |
1960 | " t_task_cdbs_sent: %d t_task_cdbs_ex_left: %d --" |
1961 | " t_transport_active: %d t_transport_stop: %d" | |
6708bb27 | 1962 | " t_transport_sent: %d\n", cmd->t_task_list_num, |
a1d8b49a AG |
1963 | atomic_read(&cmd->t_task_cdbs_left), |
1964 | atomic_read(&cmd->t_task_cdbs_sent), | |
1965 | atomic_read(&cmd->t_task_cdbs_ex_left), | |
1966 | atomic_read(&cmd->t_transport_active), | |
1967 | atomic_read(&cmd->t_transport_stop), | |
1968 | atomic_read(&cmd->t_transport_sent)); | |
c66ac9db NB |
1969 | |
1970 | transport_stop_all_task_timers(cmd); | |
1971 | ||
1972 | if (dev) | |
e3d6f909 | 1973 | atomic_inc(&dev->depth_left); |
c66ac9db NB |
1974 | /* |
1975 | * For SAM Task Attribute emulation for failed struct se_cmd | |
1976 | */ | |
1977 | if (cmd->se_dev->dev_task_attr_type == SAM_TASK_ATTR_EMULATED) | |
1978 | transport_complete_task_attr(cmd); | |
1979 | ||
1980 | if (complete) { | |
1981 | transport_direct_request_timeout(cmd); | |
1982 | cmd->transport_error_status = PYX_TRANSPORT_LU_COMM_FAILURE; | |
1983 | } | |
1984 | ||
1985 | switch (cmd->transport_error_status) { | |
1986 | case PYX_TRANSPORT_UNKNOWN_SAM_OPCODE: | |
1987 | cmd->scsi_sense_reason = TCM_UNSUPPORTED_SCSI_OPCODE; | |
1988 | break; | |
1989 | case PYX_TRANSPORT_REQ_TOO_MANY_SECTORS: | |
1990 | cmd->scsi_sense_reason = TCM_SECTOR_COUNT_TOO_MANY; | |
1991 | break; | |
1992 | case PYX_TRANSPORT_INVALID_CDB_FIELD: | |
1993 | cmd->scsi_sense_reason = TCM_INVALID_CDB_FIELD; | |
1994 | break; | |
1995 | case PYX_TRANSPORT_INVALID_PARAMETER_LIST: | |
1996 | cmd->scsi_sense_reason = TCM_INVALID_PARAMETER_LIST; | |
1997 | break; | |
1998 | case PYX_TRANSPORT_OUT_OF_MEMORY_RESOURCES: | |
1999 | if (!sc) | |
2000 | transport_new_cmd_failure(cmd); | |
2001 | /* | |
2002 | * Currently for PYX_TRANSPORT_OUT_OF_MEMORY_RESOURCES, | |
2003 | * we force this session to fall back to session | |
2004 | * recovery. | |
2005 | */ | |
e3d6f909 AG |
2006 | cmd->se_tfo->fall_back_to_erl0(cmd->se_sess); |
2007 | cmd->se_tfo->stop_session(cmd->se_sess, 0, 0); | |
c66ac9db NB |
2008 | |
2009 | goto check_stop; | |
2010 | case PYX_TRANSPORT_LU_COMM_FAILURE: | |
2011 | case PYX_TRANSPORT_ILLEGAL_REQUEST: | |
2012 | cmd->scsi_sense_reason = TCM_LOGICAL_UNIT_COMMUNICATION_FAILURE; | |
2013 | break; | |
2014 | case PYX_TRANSPORT_UNKNOWN_MODE_PAGE: | |
2015 | cmd->scsi_sense_reason = TCM_UNKNOWN_MODE_PAGE; | |
2016 | break; | |
2017 | case PYX_TRANSPORT_WRITE_PROTECTED: | |
2018 | cmd->scsi_sense_reason = TCM_WRITE_PROTECTED; | |
2019 | break; | |
2020 | case PYX_TRANSPORT_RESERVATION_CONFLICT: | |
2021 | /* | |
2022 | * No SENSE Data payload for this case, set SCSI Status | |
2023 | * and queue the response to $FABRIC_MOD. | |
2024 | * | |
2025 | * Uses linux/include/scsi/scsi.h SAM status codes defs | |
2026 | */ | |
2027 | cmd->scsi_status = SAM_STAT_RESERVATION_CONFLICT; | |
2028 | /* | |
2029 | * For UA Interlock Code 11b, a RESERVATION CONFLICT will | |
2030 | * establish a UNIT ATTENTION with PREVIOUS RESERVATION | |
2031 | * CONFLICT STATUS. | |
2032 | * | |
2033 | * See spc4r17, section 7.4.6 Control Mode Page, Table 349 | |
2034 | */ | |
e3d6f909 AG |
2035 | if (cmd->se_sess && |
2036 | cmd->se_dev->se_sub_dev->se_dev_attrib.emulate_ua_intlck_ctrl == 2) | |
2037 | core_scsi3_ua_allocate(cmd->se_sess->se_node_acl, | |
c66ac9db NB |
2038 | cmd->orig_fe_lun, 0x2C, |
2039 | ASCQ_2CH_PREVIOUS_RESERVATION_CONFLICT_STATUS); | |
2040 | ||
07bde79a NB |
2041 | ret = cmd->se_tfo->queue_status(cmd); |
2042 | if (ret == -EAGAIN) | |
2043 | goto queue_full; | |
c66ac9db NB |
2044 | goto check_stop; |
2045 | case PYX_TRANSPORT_USE_SENSE_REASON: | |
2046 | /* | |
2047 | * struct se_cmd->scsi_sense_reason already set | |
2048 | */ | |
2049 | break; | |
2050 | default: | |
6708bb27 | 2051 | pr_err("Unknown transport error for CDB 0x%02x: %d\n", |
a1d8b49a | 2052 | cmd->t_task_cdb[0], |
c66ac9db NB |
2053 | cmd->transport_error_status); |
2054 | cmd->scsi_sense_reason = TCM_UNSUPPORTED_SCSI_OPCODE; | |
2055 | break; | |
2056 | } | |
16ab8e60 NB |
2057 | /* |
2058 | * If a fabric does not define a cmd->se_tfo->new_cmd_map caller, | |
2059 | * make the call to transport_send_check_condition_and_sense() | |
2060 | * directly. Otherwise expect the fabric to make the call to | |
2061 | * transport_send_check_condition_and_sense() after handling | |
2062 | * possible unsoliticied write data payloads. | |
2063 | */ | |
2064 | if (!sc && !cmd->se_tfo->new_cmd_map) | |
c66ac9db | 2065 | transport_new_cmd_failure(cmd); |
07bde79a NB |
2066 | else { |
2067 | ret = transport_send_check_condition_and_sense(cmd, | |
2068 | cmd->scsi_sense_reason, 0); | |
2069 | if (ret == -EAGAIN) | |
2070 | goto queue_full; | |
2071 | } | |
2072 | ||
c66ac9db NB |
2073 | check_stop: |
2074 | transport_lun_remove_cmd(cmd); | |
6708bb27 | 2075 | if (!transport_cmd_check_stop_to_fabric(cmd)) |
c66ac9db | 2076 | ; |
07bde79a NB |
2077 | return; |
2078 | ||
2079 | queue_full: | |
2080 | cmd->t_state = TRANSPORT_COMPLETE_OK; | |
2081 | transport_handle_queue_full(cmd, cmd->se_dev, transport_complete_qf); | |
c66ac9db NB |
2082 | } |
2083 | ||
2084 | static void transport_direct_request_timeout(struct se_cmd *cmd) | |
2085 | { | |
2086 | unsigned long flags; | |
2087 | ||
a1d8b49a | 2088 | spin_lock_irqsave(&cmd->t_state_lock, flags); |
6708bb27 | 2089 | if (!atomic_read(&cmd->t_transport_timeout)) { |
a1d8b49a | 2090 | spin_unlock_irqrestore(&cmd->t_state_lock, flags); |
c66ac9db NB |
2091 | return; |
2092 | } | |
a1d8b49a AG |
2093 | if (atomic_read(&cmd->t_task_cdbs_timeout_left)) { |
2094 | spin_unlock_irqrestore(&cmd->t_state_lock, flags); | |
c66ac9db NB |
2095 | return; |
2096 | } | |
2097 | ||
a1d8b49a AG |
2098 | atomic_sub(atomic_read(&cmd->t_transport_timeout), |
2099 | &cmd->t_se_count); | |
2100 | spin_unlock_irqrestore(&cmd->t_state_lock, flags); | |
c66ac9db NB |
2101 | } |
2102 | ||
2103 | static void transport_generic_request_timeout(struct se_cmd *cmd) | |
2104 | { | |
2105 | unsigned long flags; | |
2106 | ||
2107 | /* | |
a1d8b49a | 2108 | * Reset cmd->t_se_count to allow transport_generic_remove() |
c66ac9db NB |
2109 | * to allow last call to free memory resources. |
2110 | */ | |
a1d8b49a AG |
2111 | spin_lock_irqsave(&cmd->t_state_lock, flags); |
2112 | if (atomic_read(&cmd->t_transport_timeout) > 1) { | |
2113 | int tmp = (atomic_read(&cmd->t_transport_timeout) - 1); | |
c66ac9db | 2114 | |
a1d8b49a | 2115 | atomic_sub(tmp, &cmd->t_se_count); |
c66ac9db | 2116 | } |
a1d8b49a | 2117 | spin_unlock_irqrestore(&cmd->t_state_lock, flags); |
c66ac9db | 2118 | |
35462975 | 2119 | transport_generic_remove(cmd, 0); |
c66ac9db NB |
2120 | } |
2121 | ||
c66ac9db NB |
2122 | static inline u32 transport_lba_21(unsigned char *cdb) |
2123 | { | |
2124 | return ((cdb[1] & 0x1f) << 16) | (cdb[2] << 8) | cdb[3]; | |
2125 | } | |
2126 | ||
2127 | static inline u32 transport_lba_32(unsigned char *cdb) | |
2128 | { | |
2129 | return (cdb[2] << 24) | (cdb[3] << 16) | (cdb[4] << 8) | cdb[5]; | |
2130 | } | |
2131 | ||
2132 | static inline unsigned long long transport_lba_64(unsigned char *cdb) | |
2133 | { | |
2134 | unsigned int __v1, __v2; | |
2135 | ||
2136 | __v1 = (cdb[2] << 24) | (cdb[3] << 16) | (cdb[4] << 8) | cdb[5]; | |
2137 | __v2 = (cdb[6] << 24) | (cdb[7] << 16) | (cdb[8] << 8) | cdb[9]; | |
2138 | ||
2139 | return ((unsigned long long)__v2) | (unsigned long long)__v1 << 32; | |
2140 | } | |
2141 | ||
2142 | /* | |
2143 | * For VARIABLE_LENGTH_CDB w/ 32 byte extended CDBs | |
2144 | */ | |
2145 | static inline unsigned long long transport_lba_64_ext(unsigned char *cdb) | |
2146 | { | |
2147 | unsigned int __v1, __v2; | |
2148 | ||
2149 | __v1 = (cdb[12] << 24) | (cdb[13] << 16) | (cdb[14] << 8) | cdb[15]; | |
2150 | __v2 = (cdb[16] << 24) | (cdb[17] << 16) | (cdb[18] << 8) | cdb[19]; | |
2151 | ||
2152 | return ((unsigned long long)__v2) | (unsigned long long)__v1 << 32; | |
2153 | } | |
2154 | ||
2155 | static void transport_set_supported_SAM_opcode(struct se_cmd *se_cmd) | |
2156 | { | |
2157 | unsigned long flags; | |
2158 | ||
a1d8b49a | 2159 | spin_lock_irqsave(&se_cmd->t_state_lock, flags); |
c66ac9db | 2160 | se_cmd->se_cmd_flags |= SCF_SUPPORTED_SAM_OPCODE; |
a1d8b49a | 2161 | spin_unlock_irqrestore(&se_cmd->t_state_lock, flags); |
c66ac9db NB |
2162 | } |
2163 | ||
2164 | /* | |
2165 | * Called from interrupt context. | |
2166 | */ | |
2167 | static void transport_task_timeout_handler(unsigned long data) | |
2168 | { | |
2169 | struct se_task *task = (struct se_task *)data; | |
e3d6f909 | 2170 | struct se_cmd *cmd = task->task_se_cmd; |
c66ac9db NB |
2171 | unsigned long flags; |
2172 | ||
6708bb27 | 2173 | pr_debug("transport task timeout fired! task: %p cmd: %p\n", task, cmd); |
c66ac9db | 2174 | |
a1d8b49a | 2175 | spin_lock_irqsave(&cmd->t_state_lock, flags); |
c66ac9db | 2176 | if (task->task_flags & TF_STOP) { |
a1d8b49a | 2177 | spin_unlock_irqrestore(&cmd->t_state_lock, flags); |
c66ac9db NB |
2178 | return; |
2179 | } | |
2180 | task->task_flags &= ~TF_RUNNING; | |
2181 | ||
2182 | /* | |
2183 | * Determine if transport_complete_task() has already been called. | |
2184 | */ | |
6708bb27 AG |
2185 | if (!atomic_read(&task->task_active)) { |
2186 | pr_debug("transport task: %p cmd: %p timeout task_active" | |
c66ac9db | 2187 | " == 0\n", task, cmd); |
a1d8b49a | 2188 | spin_unlock_irqrestore(&cmd->t_state_lock, flags); |
c66ac9db NB |
2189 | return; |
2190 | } | |
2191 | ||
a1d8b49a AG |
2192 | atomic_inc(&cmd->t_se_count); |
2193 | atomic_inc(&cmd->t_transport_timeout); | |
2194 | cmd->t_tasks_failed = 1; | |
c66ac9db NB |
2195 | |
2196 | atomic_set(&task->task_timeout, 1); | |
2197 | task->task_error_status = PYX_TRANSPORT_TASK_TIMEOUT; | |
2198 | task->task_scsi_status = 1; | |
2199 | ||
2200 | if (atomic_read(&task->task_stop)) { | |
6708bb27 | 2201 | pr_debug("transport task: %p cmd: %p timeout task_stop" |
c66ac9db | 2202 | " == 1\n", task, cmd); |
a1d8b49a | 2203 | spin_unlock_irqrestore(&cmd->t_state_lock, flags); |
c66ac9db NB |
2204 | complete(&task->task_stop_comp); |
2205 | return; | |
2206 | } | |
2207 | ||
6708bb27 AG |
2208 | if (!atomic_dec_and_test(&cmd->t_task_cdbs_left)) { |
2209 | pr_debug("transport task: %p cmd: %p timeout non zero" | |
c66ac9db | 2210 | " t_task_cdbs_left\n", task, cmd); |
a1d8b49a | 2211 | spin_unlock_irqrestore(&cmd->t_state_lock, flags); |
c66ac9db NB |
2212 | return; |
2213 | } | |
6708bb27 | 2214 | pr_debug("transport task: %p cmd: %p timeout ZERO t_task_cdbs_left\n", |
c66ac9db NB |
2215 | task, cmd); |
2216 | ||
2217 | cmd->t_state = TRANSPORT_COMPLETE_FAILURE; | |
a1d8b49a | 2218 | spin_unlock_irqrestore(&cmd->t_state_lock, flags); |
c66ac9db NB |
2219 | |
2220 | transport_add_cmd_to_queue(cmd, TRANSPORT_COMPLETE_FAILURE); | |
2221 | } | |
2222 | ||
2223 | /* | |
a1d8b49a | 2224 | * Called with cmd->t_state_lock held. |
c66ac9db NB |
2225 | */ |
2226 | static void transport_start_task_timer(struct se_task *task) | |
2227 | { | |
2228 | struct se_device *dev = task->se_dev; | |
2229 | int timeout; | |
2230 | ||
2231 | if (task->task_flags & TF_RUNNING) | |
2232 | return; | |
2233 | /* | |
2234 | * If the task_timeout is disabled, exit now. | |
2235 | */ | |
e3d6f909 | 2236 | timeout = dev->se_sub_dev->se_dev_attrib.task_timeout; |
6708bb27 | 2237 | if (!timeout) |
c66ac9db NB |
2238 | return; |
2239 | ||
2240 | init_timer(&task->task_timer); | |
2241 | task->task_timer.expires = (get_jiffies_64() + timeout * HZ); | |
2242 | task->task_timer.data = (unsigned long) task; | |
2243 | task->task_timer.function = transport_task_timeout_handler; | |
2244 | ||
2245 | task->task_flags |= TF_RUNNING; | |
2246 | add_timer(&task->task_timer); | |
2247 | #if 0 | |
6708bb27 | 2248 | pr_debug("Starting task timer for cmd: %p task: %p seconds:" |
c66ac9db NB |
2249 | " %d\n", task->task_se_cmd, task, timeout); |
2250 | #endif | |
2251 | } | |
2252 | ||
2253 | /* | |
a1d8b49a | 2254 | * Called with spin_lock_irq(&cmd->t_state_lock) held. |
c66ac9db NB |
2255 | */ |
2256 | void __transport_stop_task_timer(struct se_task *task, unsigned long *flags) | |
2257 | { | |
e3d6f909 | 2258 | struct se_cmd *cmd = task->task_se_cmd; |
c66ac9db | 2259 | |
6708bb27 | 2260 | if (!task->task_flags & TF_RUNNING) |
c66ac9db NB |
2261 | return; |
2262 | ||
2263 | task->task_flags |= TF_STOP; | |
a1d8b49a | 2264 | spin_unlock_irqrestore(&cmd->t_state_lock, *flags); |
c66ac9db NB |
2265 | |
2266 | del_timer_sync(&task->task_timer); | |
2267 | ||
a1d8b49a | 2268 | spin_lock_irqsave(&cmd->t_state_lock, *flags); |
c66ac9db NB |
2269 | task->task_flags &= ~TF_RUNNING; |
2270 | task->task_flags &= ~TF_STOP; | |
2271 | } | |
2272 | ||
2273 | static void transport_stop_all_task_timers(struct se_cmd *cmd) | |
2274 | { | |
2275 | struct se_task *task = NULL, *task_tmp; | |
2276 | unsigned long flags; | |
2277 | ||
a1d8b49a | 2278 | spin_lock_irqsave(&cmd->t_state_lock, flags); |
c66ac9db | 2279 | list_for_each_entry_safe(task, task_tmp, |
a1d8b49a | 2280 | &cmd->t_task_list, t_list) |
c66ac9db | 2281 | __transport_stop_task_timer(task, &flags); |
a1d8b49a | 2282 | spin_unlock_irqrestore(&cmd->t_state_lock, flags); |
c66ac9db NB |
2283 | } |
2284 | ||
2285 | static inline int transport_tcq_window_closed(struct se_device *dev) | |
2286 | { | |
2287 | if (dev->dev_tcq_window_closed++ < | |
2288 | PYX_TRANSPORT_WINDOW_CLOSED_THRESHOLD) { | |
2289 | msleep(PYX_TRANSPORT_WINDOW_CLOSED_WAIT_SHORT); | |
2290 | } else | |
2291 | msleep(PYX_TRANSPORT_WINDOW_CLOSED_WAIT_LONG); | |
2292 | ||
e3d6f909 | 2293 | wake_up_interruptible(&dev->dev_queue_obj.thread_wq); |
c66ac9db NB |
2294 | return 0; |
2295 | } | |
2296 | ||
2297 | /* | |
2298 | * Called from Fabric Module context from transport_execute_tasks() | |
2299 | * | |
2300 | * The return of this function determins if the tasks from struct se_cmd | |
2301 | * get added to the execution queue in transport_execute_tasks(), | |
2302 | * or are added to the delayed or ordered lists here. | |
2303 | */ | |
2304 | static inline int transport_execute_task_attr(struct se_cmd *cmd) | |
2305 | { | |
5951146d | 2306 | if (cmd->se_dev->dev_task_attr_type != SAM_TASK_ATTR_EMULATED) |
c66ac9db NB |
2307 | return 1; |
2308 | /* | |
25985edc | 2309 | * Check for the existence of HEAD_OF_QUEUE, and if true return 1 |
c66ac9db NB |
2310 | * to allow the passed struct se_cmd list of tasks to the front of the list. |
2311 | */ | |
e66ecd50 | 2312 | if (cmd->sam_task_attr == MSG_HEAD_TAG) { |
5951146d | 2313 | atomic_inc(&cmd->se_dev->dev_hoq_count); |
c66ac9db | 2314 | smp_mb__after_atomic_inc(); |
6708bb27 | 2315 | pr_debug("Added HEAD_OF_QUEUE for CDB:" |
c66ac9db | 2316 | " 0x%02x, se_ordered_id: %u\n", |
6708bb27 | 2317 | cmd->t_task_cdb[0], |
c66ac9db NB |
2318 | cmd->se_ordered_id); |
2319 | return 1; | |
e66ecd50 | 2320 | } else if (cmd->sam_task_attr == MSG_ORDERED_TAG) { |
5951146d AG |
2321 | spin_lock(&cmd->se_dev->ordered_cmd_lock); |
2322 | list_add_tail(&cmd->se_ordered_node, | |
2323 | &cmd->se_dev->ordered_cmd_list); | |
2324 | spin_unlock(&cmd->se_dev->ordered_cmd_lock); | |
c66ac9db | 2325 | |
5951146d | 2326 | atomic_inc(&cmd->se_dev->dev_ordered_sync); |
c66ac9db NB |
2327 | smp_mb__after_atomic_inc(); |
2328 | ||
6708bb27 | 2329 | pr_debug("Added ORDERED for CDB: 0x%02x to ordered" |
c66ac9db | 2330 | " list, se_ordered_id: %u\n", |
a1d8b49a | 2331 | cmd->t_task_cdb[0], |
c66ac9db NB |
2332 | cmd->se_ordered_id); |
2333 | /* | |
2334 | * Add ORDERED command to tail of execution queue if | |
2335 | * no other older commands exist that need to be | |
2336 | * completed first. | |
2337 | */ | |
6708bb27 | 2338 | if (!atomic_read(&cmd->se_dev->simple_cmds)) |
c66ac9db NB |
2339 | return 1; |
2340 | } else { | |
2341 | /* | |
2342 | * For SIMPLE and UNTAGGED Task Attribute commands | |
2343 | */ | |
5951146d | 2344 | atomic_inc(&cmd->se_dev->simple_cmds); |
c66ac9db NB |
2345 | smp_mb__after_atomic_inc(); |
2346 | } | |
2347 | /* | |
2348 | * Otherwise if one or more outstanding ORDERED task attribute exist, | |
2349 | * add the dormant task(s) built for the passed struct se_cmd to the | |
2350 | * execution queue and become in Active state for this struct se_device. | |
2351 | */ | |
5951146d | 2352 | if (atomic_read(&cmd->se_dev->dev_ordered_sync) != 0) { |
c66ac9db NB |
2353 | /* |
2354 | * Otherwise, add cmd w/ tasks to delayed cmd queue that | |
25985edc | 2355 | * will be drained upon completion of HEAD_OF_QUEUE task. |
c66ac9db | 2356 | */ |
5951146d | 2357 | spin_lock(&cmd->se_dev->delayed_cmd_lock); |
c66ac9db | 2358 | cmd->se_cmd_flags |= SCF_DELAYED_CMD_FROM_SAM_ATTR; |
5951146d AG |
2359 | list_add_tail(&cmd->se_delayed_node, |
2360 | &cmd->se_dev->delayed_cmd_list); | |
2361 | spin_unlock(&cmd->se_dev->delayed_cmd_lock); | |
c66ac9db | 2362 | |
6708bb27 | 2363 | pr_debug("Added CDB: 0x%02x Task Attr: 0x%02x to" |
c66ac9db | 2364 | " delayed CMD list, se_ordered_id: %u\n", |
a1d8b49a | 2365 | cmd->t_task_cdb[0], cmd->sam_task_attr, |
c66ac9db NB |
2366 | cmd->se_ordered_id); |
2367 | /* | |
2368 | * Return zero to let transport_execute_tasks() know | |
2369 | * not to add the delayed tasks to the execution list. | |
2370 | */ | |
2371 | return 0; | |
2372 | } | |
2373 | /* | |
2374 | * Otherwise, no ORDERED task attributes exist.. | |
2375 | */ | |
2376 | return 1; | |
2377 | } | |
2378 | ||
2379 | /* | |
2380 | * Called from fabric module context in transport_generic_new_cmd() and | |
2381 | * transport_generic_process_write() | |
2382 | */ | |
2383 | static int transport_execute_tasks(struct se_cmd *cmd) | |
2384 | { | |
2385 | int add_tasks; | |
2386 | ||
db1620a2 CH |
2387 | if (se_dev_check_online(cmd->se_orig_obj_ptr) != 0) { |
2388 | cmd->transport_error_status = PYX_TRANSPORT_LU_COMM_FAILURE; | |
2389 | transport_generic_request_failure(cmd, NULL, 0, 1); | |
2390 | return 0; | |
c66ac9db | 2391 | } |
db1620a2 | 2392 | |
c66ac9db NB |
2393 | /* |
2394 | * Call transport_cmd_check_stop() to see if a fabric exception | |
25985edc | 2395 | * has occurred that prevents execution. |
c66ac9db | 2396 | */ |
6708bb27 | 2397 | if (!transport_cmd_check_stop(cmd, 0, TRANSPORT_PROCESSING)) { |
c66ac9db NB |
2398 | /* |
2399 | * Check for SAM Task Attribute emulation and HEAD_OF_QUEUE | |
2400 | * attribute for the tasks of the received struct se_cmd CDB | |
2401 | */ | |
2402 | add_tasks = transport_execute_task_attr(cmd); | |
e3d6f909 | 2403 | if (!add_tasks) |
c66ac9db NB |
2404 | goto execute_tasks; |
2405 | /* | |
2406 | * This calls transport_add_tasks_from_cmd() to handle | |
2407 | * HEAD_OF_QUEUE ordering for SAM Task Attribute emulation | |
2408 | * (if enabled) in __transport_add_task_to_execute_queue() and | |
2409 | * transport_add_task_check_sam_attr(). | |
2410 | */ | |
2411 | transport_add_tasks_from_cmd(cmd); | |
2412 | } | |
2413 | /* | |
2414 | * Kick the execution queue for the cmd associated struct se_device | |
2415 | * storage object. | |
2416 | */ | |
2417 | execute_tasks: | |
5951146d | 2418 | __transport_execute_tasks(cmd->se_dev); |
c66ac9db NB |
2419 | return 0; |
2420 | } | |
2421 | ||
2422 | /* | |
2423 | * Called to check struct se_device tcq depth window, and once open pull struct se_task | |
2424 | * from struct se_device->execute_task_list and | |
2425 | * | |
2426 | * Called from transport_processing_thread() | |
2427 | */ | |
2428 | static int __transport_execute_tasks(struct se_device *dev) | |
2429 | { | |
2430 | int error; | |
2431 | struct se_cmd *cmd = NULL; | |
e3d6f909 | 2432 | struct se_task *task = NULL; |
c66ac9db NB |
2433 | unsigned long flags; |
2434 | ||
2435 | /* | |
2436 | * Check if there is enough room in the device and HBA queue to send | |
a1d8b49a | 2437 | * struct se_tasks to the selected transport. |
c66ac9db NB |
2438 | */ |
2439 | check_depth: | |
e3d6f909 | 2440 | if (!atomic_read(&dev->depth_left)) |
c66ac9db | 2441 | return transport_tcq_window_closed(dev); |
c66ac9db | 2442 | |
e3d6f909 | 2443 | dev->dev_tcq_window_closed = 0; |
c66ac9db | 2444 | |
e3d6f909 AG |
2445 | spin_lock_irq(&dev->execute_task_lock); |
2446 | if (list_empty(&dev->execute_task_list)) { | |
2447 | spin_unlock_irq(&dev->execute_task_lock); | |
c66ac9db NB |
2448 | return 0; |
2449 | } | |
e3d6f909 AG |
2450 | task = list_first_entry(&dev->execute_task_list, |
2451 | struct se_task, t_execute_list); | |
2452 | list_del(&task->t_execute_list); | |
2453 | atomic_set(&task->task_execute_queue, 0); | |
2454 | atomic_dec(&dev->execute_tasks); | |
2455 | spin_unlock_irq(&dev->execute_task_lock); | |
c66ac9db NB |
2456 | |
2457 | atomic_dec(&dev->depth_left); | |
c66ac9db | 2458 | |
e3d6f909 | 2459 | cmd = task->task_se_cmd; |
c66ac9db | 2460 | |
a1d8b49a | 2461 | spin_lock_irqsave(&cmd->t_state_lock, flags); |
c66ac9db NB |
2462 | atomic_set(&task->task_active, 1); |
2463 | atomic_set(&task->task_sent, 1); | |
a1d8b49a | 2464 | atomic_inc(&cmd->t_task_cdbs_sent); |
c66ac9db | 2465 | |
a1d8b49a AG |
2466 | if (atomic_read(&cmd->t_task_cdbs_sent) == |
2467 | cmd->t_task_list_num) | |
c66ac9db NB |
2468 | atomic_set(&cmd->transport_sent, 1); |
2469 | ||
2470 | transport_start_task_timer(task); | |
a1d8b49a | 2471 | spin_unlock_irqrestore(&cmd->t_state_lock, flags); |
c66ac9db NB |
2472 | /* |
2473 | * The struct se_cmd->transport_emulate_cdb() function pointer is used | |
e3d6f909 | 2474 | * to grab REPORT_LUNS and other CDBs we want to handle before they hit the |
c66ac9db NB |
2475 | * struct se_subsystem_api->do_task() caller below. |
2476 | */ | |
2477 | if (cmd->transport_emulate_cdb) { | |
2478 | error = cmd->transport_emulate_cdb(cmd); | |
2479 | if (error != 0) { | |
2480 | cmd->transport_error_status = error; | |
2481 | atomic_set(&task->task_active, 0); | |
2482 | atomic_set(&cmd->transport_sent, 0); | |
2483 | transport_stop_tasks_for_cmd(cmd); | |
2484 | transport_generic_request_failure(cmd, dev, 0, 1); | |
2485 | goto check_depth; | |
2486 | } | |
2487 | /* | |
2488 | * Handle the successful completion for transport_emulate_cdb() | |
2489 | * for synchronous operation, following SCF_EMULATE_CDB_ASYNC | |
2490 | * Otherwise the caller is expected to complete the task with | |
2491 | * proper status. | |
2492 | */ | |
2493 | if (!(cmd->se_cmd_flags & SCF_EMULATE_CDB_ASYNC)) { | |
2494 | cmd->scsi_status = SAM_STAT_GOOD; | |
2495 | task->task_scsi_status = GOOD; | |
2496 | transport_complete_task(task, 1); | |
2497 | } | |
2498 | } else { | |
2499 | /* | |
2500 | * Currently for all virtual TCM plugins including IBLOCK, FILEIO and | |
2501 | * RAMDISK we use the internal transport_emulate_control_cdb() logic | |
2502 | * with struct se_subsystem_api callers for the primary SPC-3 TYPE_DISK | |
2503 | * LUN emulation code. | |
2504 | * | |
2505 | * For TCM/pSCSI and all other SCF_SCSI_DATA_SG_IO_CDB I/O tasks we | |
2506 | * call ->do_task() directly and let the underlying TCM subsystem plugin | |
2507 | * code handle the CDB emulation. | |
2508 | */ | |
e3d6f909 AG |
2509 | if ((dev->transport->transport_type != TRANSPORT_PLUGIN_PHBA_PDEV) && |
2510 | (!(task->task_se_cmd->se_cmd_flags & SCF_SCSI_DATA_SG_IO_CDB))) | |
c66ac9db NB |
2511 | error = transport_emulate_control_cdb(task); |
2512 | else | |
e3d6f909 | 2513 | error = dev->transport->do_task(task); |
c66ac9db NB |
2514 | |
2515 | if (error != 0) { | |
2516 | cmd->transport_error_status = error; | |
2517 | atomic_set(&task->task_active, 0); | |
2518 | atomic_set(&cmd->transport_sent, 0); | |
2519 | transport_stop_tasks_for_cmd(cmd); | |
2520 | transport_generic_request_failure(cmd, dev, 0, 1); | |
2521 | } | |
2522 | } | |
2523 | ||
2524 | goto check_depth; | |
2525 | ||
2526 | return 0; | |
2527 | } | |
2528 | ||
2529 | void transport_new_cmd_failure(struct se_cmd *se_cmd) | |
2530 | { | |
2531 | unsigned long flags; | |
2532 | /* | |
2533 | * Any unsolicited data will get dumped for failed command inside of | |
2534 | * the fabric plugin | |
2535 | */ | |
a1d8b49a | 2536 | spin_lock_irqsave(&se_cmd->t_state_lock, flags); |
c66ac9db NB |
2537 | se_cmd->se_cmd_flags |= SCF_SE_CMD_FAILED; |
2538 | se_cmd->se_cmd_flags |= SCF_SCSI_CDB_EXCEPTION; | |
a1d8b49a | 2539 | spin_unlock_irqrestore(&se_cmd->t_state_lock, flags); |
c66ac9db NB |
2540 | } |
2541 | ||
2542 | static void transport_nop_wait_for_tasks(struct se_cmd *, int, int); | |
2543 | ||
2544 | static inline u32 transport_get_sectors_6( | |
2545 | unsigned char *cdb, | |
2546 | struct se_cmd *cmd, | |
2547 | int *ret) | |
2548 | { | |
5951146d | 2549 | struct se_device *dev = cmd->se_dev; |
c66ac9db NB |
2550 | |
2551 | /* | |
2552 | * Assume TYPE_DISK for non struct se_device objects. | |
2553 | * Use 8-bit sector value. | |
2554 | */ | |
2555 | if (!dev) | |
2556 | goto type_disk; | |
2557 | ||
2558 | /* | |
2559 | * Use 24-bit allocation length for TYPE_TAPE. | |
2560 | */ | |
e3d6f909 | 2561 | if (dev->transport->get_device_type(dev) == TYPE_TAPE) |
c66ac9db NB |
2562 | return (u32)(cdb[2] << 16) + (cdb[3] << 8) + cdb[4]; |
2563 | ||
2564 | /* | |
2565 | * Everything else assume TYPE_DISK Sector CDB location. | |
2566 | * Use 8-bit sector value. | |
2567 | */ | |
2568 | type_disk: | |
2569 | return (u32)cdb[4]; | |
2570 | } | |
2571 | ||
2572 | static inline u32 transport_get_sectors_10( | |
2573 | unsigned char *cdb, | |
2574 | struct se_cmd *cmd, | |
2575 | int *ret) | |
2576 | { | |
5951146d | 2577 | struct se_device *dev = cmd->se_dev; |
c66ac9db NB |
2578 | |
2579 | /* | |
2580 | * Assume TYPE_DISK for non struct se_device objects. | |
2581 | * Use 16-bit sector value. | |
2582 | */ | |
2583 | if (!dev) | |
2584 | goto type_disk; | |
2585 | ||
2586 | /* | |
2587 | * XXX_10 is not defined in SSC, throw an exception | |
2588 | */ | |
e3d6f909 AG |
2589 | if (dev->transport->get_device_type(dev) == TYPE_TAPE) { |
2590 | *ret = -EINVAL; | |
c66ac9db NB |
2591 | return 0; |
2592 | } | |
2593 | ||
2594 | /* | |
2595 | * Everything else assume TYPE_DISK Sector CDB location. | |
2596 | * Use 16-bit sector value. | |
2597 | */ | |
2598 | type_disk: | |
2599 | return (u32)(cdb[7] << 8) + cdb[8]; | |
2600 | } | |
2601 | ||
2602 | static inline u32 transport_get_sectors_12( | |
2603 | unsigned char *cdb, | |
2604 | struct se_cmd *cmd, | |
2605 | int *ret) | |
2606 | { | |
5951146d | 2607 | struct se_device *dev = cmd->se_dev; |
c66ac9db NB |
2608 | |
2609 | /* | |
2610 | * Assume TYPE_DISK for non struct se_device objects. | |
2611 | * Use 32-bit sector value. | |
2612 | */ | |
2613 | if (!dev) | |
2614 | goto type_disk; | |
2615 | ||
2616 | /* | |
2617 | * XXX_12 is not defined in SSC, throw an exception | |
2618 | */ | |
e3d6f909 AG |
2619 | if (dev->transport->get_device_type(dev) == TYPE_TAPE) { |
2620 | *ret = -EINVAL; | |
c66ac9db NB |
2621 | return 0; |
2622 | } | |
2623 | ||
2624 | /* | |
2625 | * Everything else assume TYPE_DISK Sector CDB location. | |
2626 | * Use 32-bit sector value. | |
2627 | */ | |
2628 | type_disk: | |
2629 | return (u32)(cdb[6] << 24) + (cdb[7] << 16) + (cdb[8] << 8) + cdb[9]; | |
2630 | } | |
2631 | ||
2632 | static inline u32 transport_get_sectors_16( | |
2633 | unsigned char *cdb, | |
2634 | struct se_cmd *cmd, | |
2635 | int *ret) | |
2636 | { | |
5951146d | 2637 | struct se_device *dev = cmd->se_dev; |
c66ac9db NB |
2638 | |
2639 | /* | |
2640 | * Assume TYPE_DISK for non struct se_device objects. | |
2641 | * Use 32-bit sector value. | |
2642 | */ | |
2643 | if (!dev) | |
2644 | goto type_disk; | |
2645 | ||
2646 | /* | |
2647 | * Use 24-bit allocation length for TYPE_TAPE. | |
2648 | */ | |
e3d6f909 | 2649 | if (dev->transport->get_device_type(dev) == TYPE_TAPE) |
c66ac9db NB |
2650 | return (u32)(cdb[12] << 16) + (cdb[13] << 8) + cdb[14]; |
2651 | ||
2652 | type_disk: | |
2653 | return (u32)(cdb[10] << 24) + (cdb[11] << 16) + | |
2654 | (cdb[12] << 8) + cdb[13]; | |
2655 | } | |
2656 | ||
2657 | /* | |
2658 | * Used for VARIABLE_LENGTH_CDB WRITE_32 and READ_32 variants | |
2659 | */ | |
2660 | static inline u32 transport_get_sectors_32( | |
2661 | unsigned char *cdb, | |
2662 | struct se_cmd *cmd, | |
2663 | int *ret) | |
2664 | { | |
2665 | /* | |
2666 | * Assume TYPE_DISK for non struct se_device objects. | |
2667 | * Use 32-bit sector value. | |
2668 | */ | |
2669 | return (u32)(cdb[28] << 24) + (cdb[29] << 16) + | |
2670 | (cdb[30] << 8) + cdb[31]; | |
2671 | ||
2672 | } | |
2673 | ||
2674 | static inline u32 transport_get_size( | |
2675 | u32 sectors, | |
2676 | unsigned char *cdb, | |
2677 | struct se_cmd *cmd) | |
2678 | { | |
5951146d | 2679 | struct se_device *dev = cmd->se_dev; |
c66ac9db | 2680 | |
e3d6f909 | 2681 | if (dev->transport->get_device_type(dev) == TYPE_TAPE) { |
c66ac9db | 2682 | if (cdb[1] & 1) { /* sectors */ |
e3d6f909 | 2683 | return dev->se_sub_dev->se_dev_attrib.block_size * sectors; |
c66ac9db NB |
2684 | } else /* bytes */ |
2685 | return sectors; | |
2686 | } | |
2687 | #if 0 | |
6708bb27 | 2688 | pr_debug("Returning block_size: %u, sectors: %u == %u for" |
e3d6f909 AG |
2689 | " %s object\n", dev->se_sub_dev->se_dev_attrib.block_size, sectors, |
2690 | dev->se_sub_dev->se_dev_attrib.block_size * sectors, | |
2691 | dev->transport->name); | |
c66ac9db | 2692 | #endif |
e3d6f909 | 2693 | return dev->se_sub_dev->se_dev_attrib.block_size * sectors; |
c66ac9db NB |
2694 | } |
2695 | ||
c66ac9db NB |
2696 | static void transport_xor_callback(struct se_cmd *cmd) |
2697 | { | |
2698 | unsigned char *buf, *addr; | |
ec98f782 | 2699 | struct scatterlist *sg; |
c66ac9db NB |
2700 | unsigned int offset; |
2701 | int i; | |
ec98f782 | 2702 | int count; |
c66ac9db NB |
2703 | /* |
2704 | * From sbc3r22.pdf section 5.48 XDWRITEREAD (10) command | |
2705 | * | |
2706 | * 1) read the specified logical block(s); | |
2707 | * 2) transfer logical blocks from the data-out buffer; | |
2708 | * 3) XOR the logical blocks transferred from the data-out buffer with | |
2709 | * the logical blocks read, storing the resulting XOR data in a buffer; | |
2710 | * 4) if the DISABLE WRITE bit is set to zero, then write the logical | |
2711 | * blocks transferred from the data-out buffer; and | |
2712 | * 5) transfer the resulting XOR data to the data-in buffer. | |
2713 | */ | |
2714 | buf = kmalloc(cmd->data_length, GFP_KERNEL); | |
6708bb27 AG |
2715 | if (!buf) { |
2716 | pr_err("Unable to allocate xor_callback buf\n"); | |
c66ac9db NB |
2717 | return; |
2718 | } | |
2719 | /* | |
ec98f782 | 2720 | * Copy the scatterlist WRITE buffer located at cmd->t_data_sg |
c66ac9db NB |
2721 | * into the locally allocated *buf |
2722 | */ | |
ec98f782 AG |
2723 | sg_copy_to_buffer(cmd->t_data_sg, |
2724 | cmd->t_data_nents, | |
2725 | buf, | |
2726 | cmd->data_length); | |
2727 | ||
c66ac9db NB |
2728 | /* |
2729 | * Now perform the XOR against the BIDI read memory located at | |
a1d8b49a | 2730 | * cmd->t_mem_bidi_list |
c66ac9db NB |
2731 | */ |
2732 | ||
2733 | offset = 0; | |
ec98f782 AG |
2734 | for_each_sg(cmd->t_bidi_data_sg, sg, cmd->t_bidi_data_nents, count) { |
2735 | addr = kmap_atomic(sg_page(sg), KM_USER0); | |
2736 | if (!addr) | |
c66ac9db NB |
2737 | goto out; |
2738 | ||
ec98f782 AG |
2739 | for (i = 0; i < sg->length; i++) |
2740 | *(addr + sg->offset + i) ^= *(buf + offset + i); | |
c66ac9db | 2741 | |
ec98f782 | 2742 | offset += sg->length; |
c66ac9db NB |
2743 | kunmap_atomic(addr, KM_USER0); |
2744 | } | |
ec98f782 | 2745 | |
c66ac9db NB |
2746 | out: |
2747 | kfree(buf); | |
2748 | } | |
2749 | ||
2750 | /* | |
2751 | * Used to obtain Sense Data from underlying Linux/SCSI struct scsi_cmnd | |
2752 | */ | |
2753 | static int transport_get_sense_data(struct se_cmd *cmd) | |
2754 | { | |
2755 | unsigned char *buffer = cmd->sense_buffer, *sense_buffer = NULL; | |
2756 | struct se_device *dev; | |
2757 | struct se_task *task = NULL, *task_tmp; | |
2758 | unsigned long flags; | |
2759 | u32 offset = 0; | |
2760 | ||
e3d6f909 AG |
2761 | WARN_ON(!cmd->se_lun); |
2762 | ||
a1d8b49a | 2763 | spin_lock_irqsave(&cmd->t_state_lock, flags); |
c66ac9db | 2764 | if (cmd->se_cmd_flags & SCF_SENT_CHECK_CONDITION) { |
a1d8b49a | 2765 | spin_unlock_irqrestore(&cmd->t_state_lock, flags); |
c66ac9db NB |
2766 | return 0; |
2767 | } | |
2768 | ||
2769 | list_for_each_entry_safe(task, task_tmp, | |
a1d8b49a | 2770 | &cmd->t_task_list, t_list) { |
c66ac9db NB |
2771 | |
2772 | if (!task->task_sense) | |
2773 | continue; | |
2774 | ||
2775 | dev = task->se_dev; | |
6708bb27 | 2776 | if (!dev) |
c66ac9db NB |
2777 | continue; |
2778 | ||
e3d6f909 | 2779 | if (!dev->transport->get_sense_buffer) { |
6708bb27 | 2780 | pr_err("dev->transport->get_sense_buffer" |
c66ac9db NB |
2781 | " is NULL\n"); |
2782 | continue; | |
2783 | } | |
2784 | ||
e3d6f909 | 2785 | sense_buffer = dev->transport->get_sense_buffer(task); |
6708bb27 AG |
2786 | if (!sense_buffer) { |
2787 | pr_err("ITT[0x%08x]_TASK[%d]: Unable to locate" | |
c66ac9db | 2788 | " sense buffer for task with sense\n", |
e3d6f909 | 2789 | cmd->se_tfo->get_task_tag(cmd), task->task_no); |
c66ac9db NB |
2790 | continue; |
2791 | } | |
a1d8b49a | 2792 | spin_unlock_irqrestore(&cmd->t_state_lock, flags); |
c66ac9db | 2793 | |
e3d6f909 | 2794 | offset = cmd->se_tfo->set_fabric_sense_len(cmd, |
c66ac9db NB |
2795 | TRANSPORT_SENSE_BUFFER); |
2796 | ||
5951146d | 2797 | memcpy(&buffer[offset], sense_buffer, |
c66ac9db NB |
2798 | TRANSPORT_SENSE_BUFFER); |
2799 | cmd->scsi_status = task->task_scsi_status; | |
2800 | /* Automatically padded */ | |
2801 | cmd->scsi_sense_length = | |
2802 | (TRANSPORT_SENSE_BUFFER + offset); | |
2803 | ||
6708bb27 | 2804 | pr_debug("HBA_[%u]_PLUG[%s]: Set SAM STATUS: 0x%02x" |
c66ac9db | 2805 | " and sense\n", |
e3d6f909 | 2806 | dev->se_hba->hba_id, dev->transport->name, |
c66ac9db NB |
2807 | cmd->scsi_status); |
2808 | return 0; | |
2809 | } | |
a1d8b49a | 2810 | spin_unlock_irqrestore(&cmd->t_state_lock, flags); |
c66ac9db NB |
2811 | |
2812 | return -1; | |
2813 | } | |
2814 | ||
c66ac9db NB |
2815 | static int |
2816 | transport_handle_reservation_conflict(struct se_cmd *cmd) | |
2817 | { | |
2818 | cmd->transport_wait_for_tasks = &transport_nop_wait_for_tasks; | |
2819 | cmd->se_cmd_flags |= SCF_SCSI_CDB_EXCEPTION; | |
2820 | cmd->se_cmd_flags |= SCF_SCSI_RESERVATION_CONFLICT; | |
2821 | cmd->scsi_status = SAM_STAT_RESERVATION_CONFLICT; | |
2822 | /* | |
2823 | * For UA Interlock Code 11b, a RESERVATION CONFLICT will | |
2824 | * establish a UNIT ATTENTION with PREVIOUS RESERVATION | |
2825 | * CONFLICT STATUS. | |
2826 | * | |
2827 | * See spc4r17, section 7.4.6 Control Mode Page, Table 349 | |
2828 | */ | |
e3d6f909 AG |
2829 | if (cmd->se_sess && |
2830 | cmd->se_dev->se_sub_dev->se_dev_attrib.emulate_ua_intlck_ctrl == 2) | |
2831 | core_scsi3_ua_allocate(cmd->se_sess->se_node_acl, | |
c66ac9db NB |
2832 | cmd->orig_fe_lun, 0x2C, |
2833 | ASCQ_2CH_PREVIOUS_RESERVATION_CONFLICT_STATUS); | |
5951146d | 2834 | return -EINVAL; |
c66ac9db NB |
2835 | } |
2836 | ||
ec98f782 AG |
2837 | static inline long long transport_dev_end_lba(struct se_device *dev) |
2838 | { | |
2839 | return dev->transport->get_blocks(dev) + 1; | |
2840 | } | |
2841 | ||
2842 | static int transport_cmd_get_valid_sectors(struct se_cmd *cmd) | |
2843 | { | |
2844 | struct se_device *dev = cmd->se_dev; | |
2845 | u32 sectors; | |
2846 | ||
2847 | if (dev->transport->get_device_type(dev) != TYPE_DISK) | |
2848 | return 0; | |
2849 | ||
2850 | sectors = (cmd->data_length / dev->se_sub_dev->se_dev_attrib.block_size); | |
2851 | ||
6708bb27 AG |
2852 | if ((cmd->t_task_lba + sectors) > transport_dev_end_lba(dev)) { |
2853 | pr_err("LBA: %llu Sectors: %u exceeds" | |
ec98f782 AG |
2854 | " transport_dev_end_lba(): %llu\n", |
2855 | cmd->t_task_lba, sectors, | |
2856 | transport_dev_end_lba(dev)); | |
7abbe7f3 | 2857 | return -EINVAL; |
ec98f782 AG |
2858 | } |
2859 | ||
7abbe7f3 | 2860 | return 0; |
ec98f782 AG |
2861 | } |
2862 | ||
706d5860 NB |
2863 | static int target_check_write_same_discard(unsigned char *flags, struct se_device *dev) |
2864 | { | |
2865 | /* | |
2866 | * Determine if the received WRITE_SAME is used to for direct | |
2867 | * passthrough into Linux/SCSI with struct request via TCM/pSCSI | |
2868 | * or we are signaling the use of internal WRITE_SAME + UNMAP=1 | |
2869 | * emulation for -> Linux/BLOCK disbard with TCM/IBLOCK code. | |
2870 | */ | |
2871 | int passthrough = (dev->transport->transport_type == | |
2872 | TRANSPORT_PLUGIN_PHBA_PDEV); | |
2873 | ||
2874 | if (!passthrough) { | |
2875 | if ((flags[0] & 0x04) || (flags[0] & 0x02)) { | |
2876 | pr_err("WRITE_SAME PBDATA and LBDATA" | |
2877 | " bits not supported for Block Discard" | |
2878 | " Emulation\n"); | |
2879 | return -ENOSYS; | |
2880 | } | |
2881 | /* | |
2882 | * Currently for the emulated case we only accept | |
2883 | * tpws with the UNMAP=1 bit set. | |
2884 | */ | |
2885 | if (!(flags[0] & 0x08)) { | |
2886 | pr_err("WRITE_SAME w/o UNMAP bit not" | |
2887 | " supported for Block Discard Emulation\n"); | |
2888 | return -ENOSYS; | |
2889 | } | |
2890 | } | |
2891 | ||
2892 | return 0; | |
2893 | } | |
2894 | ||
c66ac9db NB |
2895 | /* transport_generic_cmd_sequencer(): |
2896 | * | |
2897 | * Generic Command Sequencer that should work for most DAS transport | |
2898 | * drivers. | |
2899 | * | |
2900 | * Called from transport_generic_allocate_tasks() in the $FABRIC_MOD | |
2901 | * RX Thread. | |
2902 | * | |
2903 | * FIXME: Need to support other SCSI OPCODES where as well. | |
2904 | */ | |
2905 | static int transport_generic_cmd_sequencer( | |
2906 | struct se_cmd *cmd, | |
2907 | unsigned char *cdb) | |
2908 | { | |
5951146d | 2909 | struct se_device *dev = cmd->se_dev; |
c66ac9db NB |
2910 | struct se_subsystem_dev *su_dev = dev->se_sub_dev; |
2911 | int ret = 0, sector_ret = 0, passthrough; | |
2912 | u32 sectors = 0, size = 0, pr_reg_type = 0; | |
2913 | u16 service_action; | |
2914 | u8 alua_ascq = 0; | |
2915 | /* | |
2916 | * Check for an existing UNIT ATTENTION condition | |
2917 | */ | |
2918 | if (core_scsi3_ua_check(cmd, cdb) < 0) { | |
2919 | cmd->transport_wait_for_tasks = | |
2920 | &transport_nop_wait_for_tasks; | |
2921 | cmd->se_cmd_flags |= SCF_SCSI_CDB_EXCEPTION; | |
2922 | cmd->scsi_sense_reason = TCM_CHECK_CONDITION_UNIT_ATTENTION; | |
5951146d | 2923 | return -EINVAL; |
c66ac9db NB |
2924 | } |
2925 | /* | |
2926 | * Check status of Asymmetric Logical Unit Assignment port | |
2927 | */ | |
e3d6f909 | 2928 | ret = su_dev->t10_alua.alua_state_check(cmd, cdb, &alua_ascq); |
c66ac9db NB |
2929 | if (ret != 0) { |
2930 | cmd->transport_wait_for_tasks = &transport_nop_wait_for_tasks; | |
2931 | /* | |
25985edc | 2932 | * Set SCSI additional sense code (ASC) to 'LUN Not Accessible'; |
c66ac9db NB |
2933 | * The ALUA additional sense code qualifier (ASCQ) is determined |
2934 | * by the ALUA primary or secondary access state.. | |
2935 | */ | |
2936 | if (ret > 0) { | |
2937 | #if 0 | |
6708bb27 | 2938 | pr_debug("[%s]: ALUA TG Port not available," |
c66ac9db | 2939 | " SenseKey: NOT_READY, ASC/ASCQ: 0x04/0x%02x\n", |
e3d6f909 | 2940 | cmd->se_tfo->get_fabric_name(), alua_ascq); |
c66ac9db NB |
2941 | #endif |
2942 | transport_set_sense_codes(cmd, 0x04, alua_ascq); | |
2943 | cmd->se_cmd_flags |= SCF_SCSI_CDB_EXCEPTION; | |
2944 | cmd->scsi_sense_reason = TCM_CHECK_CONDITION_NOT_READY; | |
5951146d | 2945 | return -EINVAL; |
c66ac9db NB |
2946 | } |
2947 | goto out_invalid_cdb_field; | |
2948 | } | |
2949 | /* | |
2950 | * Check status for SPC-3 Persistent Reservations | |
2951 | */ | |
e3d6f909 AG |
2952 | if (su_dev->t10_pr.pr_ops.t10_reservation_check(cmd, &pr_reg_type) != 0) { |
2953 | if (su_dev->t10_pr.pr_ops.t10_seq_non_holder( | |
c66ac9db NB |
2954 | cmd, cdb, pr_reg_type) != 0) |
2955 | return transport_handle_reservation_conflict(cmd); | |
2956 | /* | |
2957 | * This means the CDB is allowed for the SCSI Initiator port | |
2958 | * when said port is *NOT* holding the legacy SPC-2 or | |
2959 | * SPC-3 Persistent Reservation. | |
2960 | */ | |
2961 | } | |
2962 | ||
2963 | switch (cdb[0]) { | |
2964 | case READ_6: | |
2965 | sectors = transport_get_sectors_6(cdb, cmd, §or_ret); | |
2966 | if (sector_ret) | |
2967 | goto out_unsupported_cdb; | |
2968 | size = transport_get_size(sectors, cdb, cmd); | |
2969 | cmd->transport_split_cdb = &split_cdb_XX_6; | |
a1d8b49a | 2970 | cmd->t_task_lba = transport_lba_21(cdb); |
c66ac9db NB |
2971 | cmd->se_cmd_flags |= SCF_SCSI_DATA_SG_IO_CDB; |
2972 | break; | |
2973 | case READ_10: | |
2974 | sectors = transport_get_sectors_10(cdb, cmd, §or_ret); | |
2975 | if (sector_ret) | |
2976 | goto out_unsupported_cdb; | |
2977 | size = transport_get_size(sectors, cdb, cmd); | |
2978 | cmd->transport_split_cdb = &split_cdb_XX_10; | |
a1d8b49a | 2979 | cmd->t_task_lba = transport_lba_32(cdb); |
c66ac9db NB |
2980 | cmd->se_cmd_flags |= SCF_SCSI_DATA_SG_IO_CDB; |
2981 | break; | |
2982 | case READ_12: | |
2983 | sectors = transport_get_sectors_12(cdb, cmd, §or_ret); | |
2984 | if (sector_ret) | |
2985 | goto out_unsupported_cdb; | |
2986 | size = transport_get_size(sectors, cdb, cmd); | |
2987 | cmd->transport_split_cdb = &split_cdb_XX_12; | |
a1d8b49a | 2988 | cmd->t_task_lba = transport_lba_32(cdb); |
c66ac9db NB |
2989 | cmd->se_cmd_flags |= SCF_SCSI_DATA_SG_IO_CDB; |
2990 | break; | |
2991 | case READ_16: | |
2992 | sectors = transport_get_sectors_16(cdb, cmd, §or_ret); | |
2993 | if (sector_ret) | |
2994 | goto out_unsupported_cdb; | |
2995 | size = transport_get_size(sectors, cdb, cmd); | |
2996 | cmd->transport_split_cdb = &split_cdb_XX_16; | |
a1d8b49a | 2997 | cmd->t_task_lba = transport_lba_64(cdb); |
c66ac9db NB |
2998 | cmd->se_cmd_flags |= SCF_SCSI_DATA_SG_IO_CDB; |
2999 | break; | |
3000 | case WRITE_6: | |
3001 | sectors = transport_get_sectors_6(cdb, cmd, §or_ret); | |
3002 | if (sector_ret) | |
3003 | goto out_unsupported_cdb; | |
3004 | size = transport_get_size(sectors, cdb, cmd); | |
3005 | cmd->transport_split_cdb = &split_cdb_XX_6; | |
a1d8b49a | 3006 | cmd->t_task_lba = transport_lba_21(cdb); |
c66ac9db NB |
3007 | cmd->se_cmd_flags |= SCF_SCSI_DATA_SG_IO_CDB; |
3008 | break; | |
3009 | case WRITE_10: | |
3010 | sectors = transport_get_sectors_10(cdb, cmd, §or_ret); | |
3011 | if (sector_ret) | |
3012 | goto out_unsupported_cdb; | |
3013 | size = transport_get_size(sectors, cdb, cmd); | |
3014 | cmd->transport_split_cdb = &split_cdb_XX_10; | |
a1d8b49a AG |
3015 | cmd->t_task_lba = transport_lba_32(cdb); |
3016 | cmd->t_tasks_fua = (cdb[1] & 0x8); | |
c66ac9db NB |
3017 | cmd->se_cmd_flags |= SCF_SCSI_DATA_SG_IO_CDB; |
3018 | break; | |
3019 | case WRITE_12: | |
3020 | sectors = transport_get_sectors_12(cdb, cmd, §or_ret); | |
3021 | if (sector_ret) | |
3022 | goto out_unsupported_cdb; | |
3023 | size = transport_get_size(sectors, cdb, cmd); | |
3024 | cmd->transport_split_cdb = &split_cdb_XX_12; | |
a1d8b49a AG |
3025 | cmd->t_task_lba = transport_lba_32(cdb); |
3026 | cmd->t_tasks_fua = (cdb[1] & 0x8); | |
c66ac9db NB |
3027 | cmd->se_cmd_flags |= SCF_SCSI_DATA_SG_IO_CDB; |
3028 | break; | |
3029 | case WRITE_16: | |
3030 | sectors = transport_get_sectors_16(cdb, cmd, §or_ret); | |
3031 | if (sector_ret) | |
3032 | goto out_unsupported_cdb; | |
3033 | size = transport_get_size(sectors, cdb, cmd); | |
3034 | cmd->transport_split_cdb = &split_cdb_XX_16; | |
a1d8b49a AG |
3035 | cmd->t_task_lba = transport_lba_64(cdb); |
3036 | cmd->t_tasks_fua = (cdb[1] & 0x8); | |
c66ac9db NB |
3037 | cmd->se_cmd_flags |= SCF_SCSI_DATA_SG_IO_CDB; |
3038 | break; | |
3039 | case XDWRITEREAD_10: | |
3040 | if ((cmd->data_direction != DMA_TO_DEVICE) || | |
a1d8b49a | 3041 | !(cmd->t_tasks_bidi)) |
c66ac9db NB |
3042 | goto out_invalid_cdb_field; |
3043 | sectors = transport_get_sectors_10(cdb, cmd, §or_ret); | |
3044 | if (sector_ret) | |
3045 | goto out_unsupported_cdb; | |
3046 | size = transport_get_size(sectors, cdb, cmd); | |
3047 | cmd->transport_split_cdb = &split_cdb_XX_10; | |
a1d8b49a | 3048 | cmd->t_task_lba = transport_lba_32(cdb); |
c66ac9db | 3049 | cmd->se_cmd_flags |= SCF_SCSI_DATA_SG_IO_CDB; |
e3d6f909 | 3050 | passthrough = (dev->transport->transport_type == |
c66ac9db NB |
3051 | TRANSPORT_PLUGIN_PHBA_PDEV); |
3052 | /* | |
3053 | * Skip the remaining assignments for TCM/PSCSI passthrough | |
3054 | */ | |
3055 | if (passthrough) | |
3056 | break; | |
3057 | /* | |
3058 | * Setup BIDI XOR callback to be run during transport_generic_complete_ok() | |
3059 | */ | |
3060 | cmd->transport_complete_callback = &transport_xor_callback; | |
a1d8b49a | 3061 | cmd->t_tasks_fua = (cdb[1] & 0x8); |
c66ac9db NB |
3062 | break; |
3063 | case VARIABLE_LENGTH_CMD: | |
3064 | service_action = get_unaligned_be16(&cdb[8]); | |
3065 | /* | |
3066 | * Determine if this is TCM/PSCSI device and we should disable | |
3067 | * internal emulation for this CDB. | |
3068 | */ | |
e3d6f909 | 3069 | passthrough = (dev->transport->transport_type == |
c66ac9db NB |
3070 | TRANSPORT_PLUGIN_PHBA_PDEV); |
3071 | ||
3072 | switch (service_action) { | |
3073 | case XDWRITEREAD_32: | |
3074 | sectors = transport_get_sectors_32(cdb, cmd, §or_ret); | |
3075 | if (sector_ret) | |
3076 | goto out_unsupported_cdb; | |
3077 | size = transport_get_size(sectors, cdb, cmd); | |
3078 | /* | |
3079 | * Use WRITE_32 and READ_32 opcodes for the emulated | |
3080 | * XDWRITE_READ_32 logic. | |
3081 | */ | |
3082 | cmd->transport_split_cdb = &split_cdb_XX_32; | |
a1d8b49a | 3083 | cmd->t_task_lba = transport_lba_64_ext(cdb); |
c66ac9db NB |
3084 | cmd->se_cmd_flags |= SCF_SCSI_DATA_SG_IO_CDB; |
3085 | ||
3086 | /* | |
3087 | * Skip the remaining assignments for TCM/PSCSI passthrough | |
3088 | */ | |
3089 | if (passthrough) | |
3090 | break; | |
3091 | ||
3092 | /* | |
3093 | * Setup BIDI XOR callback to be run during | |
3094 | * transport_generic_complete_ok() | |
3095 | */ | |
3096 | cmd->transport_complete_callback = &transport_xor_callback; | |
a1d8b49a | 3097 | cmd->t_tasks_fua = (cdb[10] & 0x8); |
c66ac9db NB |
3098 | break; |
3099 | case WRITE_SAME_32: | |
3100 | sectors = transport_get_sectors_32(cdb, cmd, §or_ret); | |
3101 | if (sector_ret) | |
3102 | goto out_unsupported_cdb; | |
dd3a5ad8 | 3103 | |
6708bb27 | 3104 | if (sectors) |
12850626 | 3105 | size = transport_get_size(1, cdb, cmd); |
6708bb27 AG |
3106 | else { |
3107 | pr_err("WSNZ=1, WRITE_SAME w/sectors=0 not" | |
3108 | " supported\n"); | |
3109 | goto out_invalid_cdb_field; | |
3110 | } | |
dd3a5ad8 | 3111 | |
a1d8b49a | 3112 | cmd->t_task_lba = get_unaligned_be64(&cdb[12]); |
c66ac9db NB |
3113 | cmd->se_cmd_flags |= SCF_SCSI_CONTROL_SG_IO_CDB; |
3114 | ||
706d5860 | 3115 | if (target_check_write_same_discard(&cdb[10], dev) < 0) |
c66ac9db | 3116 | goto out_invalid_cdb_field; |
706d5860 | 3117 | |
c66ac9db NB |
3118 | break; |
3119 | default: | |
6708bb27 | 3120 | pr_err("VARIABLE_LENGTH_CMD service action" |
c66ac9db NB |
3121 | " 0x%04x not supported\n", service_action); |
3122 | goto out_unsupported_cdb; | |
3123 | } | |
3124 | break; | |
e434f1f1 | 3125 | case MAINTENANCE_IN: |
e3d6f909 | 3126 | if (dev->transport->get_device_type(dev) != TYPE_ROM) { |
c66ac9db NB |
3127 | /* MAINTENANCE_IN from SCC-2 */ |
3128 | /* | |
3129 | * Check for emulated MI_REPORT_TARGET_PGS. | |
3130 | */ | |
3131 | if (cdb[1] == MI_REPORT_TARGET_PGS) { | |
3132 | cmd->transport_emulate_cdb = | |
e3d6f909 | 3133 | (su_dev->t10_alua.alua_type == |
c66ac9db | 3134 | SPC3_ALUA_EMULATED) ? |
e3d6f909 | 3135 | core_emulate_report_target_port_groups : |
c66ac9db NB |
3136 | NULL; |
3137 | } | |
3138 | size = (cdb[6] << 24) | (cdb[7] << 16) | | |
3139 | (cdb[8] << 8) | cdb[9]; | |
3140 | } else { | |
3141 | /* GPCMD_SEND_KEY from multi media commands */ | |
3142 | size = (cdb[8] << 8) + cdb[9]; | |
3143 | } | |
05d1c7c0 | 3144 | cmd->se_cmd_flags |= SCF_SCSI_CONTROL_SG_IO_CDB; |
c66ac9db NB |
3145 | break; |
3146 | case MODE_SELECT: | |
3147 | size = cdb[4]; | |
3148 | cmd->se_cmd_flags |= SCF_SCSI_CONTROL_SG_IO_CDB; | |
3149 | break; | |
3150 | case MODE_SELECT_10: | |
3151 | size = (cdb[7] << 8) + cdb[8]; | |
3152 | cmd->se_cmd_flags |= SCF_SCSI_CONTROL_SG_IO_CDB; | |
3153 | break; | |
3154 | case MODE_SENSE: | |
3155 | size = cdb[4]; | |
05d1c7c0 | 3156 | cmd->se_cmd_flags |= SCF_SCSI_CONTROL_SG_IO_CDB; |
c66ac9db NB |
3157 | break; |
3158 | case MODE_SENSE_10: | |
3159 | case GPCMD_READ_BUFFER_CAPACITY: | |
3160 | case GPCMD_SEND_OPC: | |
3161 | case LOG_SELECT: | |
3162 | case LOG_SENSE: | |
3163 | size = (cdb[7] << 8) + cdb[8]; | |
05d1c7c0 | 3164 | cmd->se_cmd_flags |= SCF_SCSI_CONTROL_SG_IO_CDB; |
c66ac9db NB |
3165 | break; |
3166 | case READ_BLOCK_LIMITS: | |
3167 | size = READ_BLOCK_LEN; | |
05d1c7c0 | 3168 | cmd->se_cmd_flags |= SCF_SCSI_CONTROL_SG_IO_CDB; |
c66ac9db NB |
3169 | break; |
3170 | case GPCMD_GET_CONFIGURATION: | |
3171 | case GPCMD_READ_FORMAT_CAPACITIES: | |
3172 | case GPCMD_READ_DISC_INFO: | |
3173 | case GPCMD_READ_TRACK_RZONE_INFO: | |
3174 | size = (cdb[7] << 8) + cdb[8]; | |
3175 | cmd->se_cmd_flags |= SCF_SCSI_CONTROL_SG_IO_CDB; | |
3176 | break; | |
3177 | case PERSISTENT_RESERVE_IN: | |
3178 | case PERSISTENT_RESERVE_OUT: | |
3179 | cmd->transport_emulate_cdb = | |
e3d6f909 | 3180 | (su_dev->t10_pr.res_type == |
c66ac9db | 3181 | SPC3_PERSISTENT_RESERVATIONS) ? |
e3d6f909 | 3182 | core_scsi3_emulate_pr : NULL; |
c66ac9db | 3183 | size = (cdb[7] << 8) + cdb[8]; |
05d1c7c0 | 3184 | cmd->se_cmd_flags |= SCF_SCSI_CONTROL_SG_IO_CDB; |
c66ac9db NB |
3185 | break; |
3186 | case GPCMD_MECHANISM_STATUS: | |
3187 | case GPCMD_READ_DVD_STRUCTURE: | |
3188 | size = (cdb[8] << 8) + cdb[9]; | |
3189 | cmd->se_cmd_flags |= SCF_SCSI_CONTROL_SG_IO_CDB; | |
3190 | break; | |
3191 | case READ_POSITION: | |
3192 | size = READ_POSITION_LEN; | |
05d1c7c0 | 3193 | cmd->se_cmd_flags |= SCF_SCSI_CONTROL_SG_IO_CDB; |
c66ac9db | 3194 | break; |
e434f1f1 | 3195 | case MAINTENANCE_OUT: |
e3d6f909 | 3196 | if (dev->transport->get_device_type(dev) != TYPE_ROM) { |
c66ac9db NB |
3197 | /* MAINTENANCE_OUT from SCC-2 |
3198 | * | |
3199 | * Check for emulated MO_SET_TARGET_PGS. | |
3200 | */ | |
3201 | if (cdb[1] == MO_SET_TARGET_PGS) { | |
3202 | cmd->transport_emulate_cdb = | |
e3d6f909 | 3203 | (su_dev->t10_alua.alua_type == |
c66ac9db | 3204 | SPC3_ALUA_EMULATED) ? |
e3d6f909 | 3205 | core_emulate_set_target_port_groups : |
c66ac9db NB |
3206 | NULL; |
3207 | } | |
3208 | ||
3209 | size = (cdb[6] << 24) | (cdb[7] << 16) | | |
3210 | (cdb[8] << 8) | cdb[9]; | |
3211 | } else { | |
3212 | /* GPCMD_REPORT_KEY from multi media commands */ | |
3213 | size = (cdb[8] << 8) + cdb[9]; | |
3214 | } | |
05d1c7c0 | 3215 | cmd->se_cmd_flags |= SCF_SCSI_CONTROL_SG_IO_CDB; |
c66ac9db NB |
3216 | break; |
3217 | case INQUIRY: | |
3218 | size = (cdb[3] << 8) + cdb[4]; | |
3219 | /* | |
3220 | * Do implict HEAD_OF_QUEUE processing for INQUIRY. | |
3221 | * See spc4r17 section 5.3 | |
3222 | */ | |
5951146d | 3223 | if (cmd->se_dev->dev_task_attr_type == SAM_TASK_ATTR_EMULATED) |
e66ecd50 | 3224 | cmd->sam_task_attr = MSG_HEAD_TAG; |
05d1c7c0 | 3225 | cmd->se_cmd_flags |= SCF_SCSI_CONTROL_SG_IO_CDB; |
c66ac9db NB |
3226 | break; |
3227 | case READ_BUFFER: | |
3228 | size = (cdb[6] << 16) + (cdb[7] << 8) + cdb[8]; | |
05d1c7c0 | 3229 | cmd->se_cmd_flags |= SCF_SCSI_CONTROL_SG_IO_CDB; |
c66ac9db NB |
3230 | break; |
3231 | case READ_CAPACITY: | |
3232 | size = READ_CAP_LEN; | |
05d1c7c0 | 3233 | cmd->se_cmd_flags |= SCF_SCSI_CONTROL_SG_IO_CDB; |
c66ac9db NB |
3234 | break; |
3235 | case READ_MEDIA_SERIAL_NUMBER: | |
3236 | case SECURITY_PROTOCOL_IN: | |
3237 | case SECURITY_PROTOCOL_OUT: | |
3238 | size = (cdb[6] << 24) | (cdb[7] << 16) | (cdb[8] << 8) | cdb[9]; | |
05d1c7c0 | 3239 | cmd->se_cmd_flags |= SCF_SCSI_CONTROL_SG_IO_CDB; |
c66ac9db NB |
3240 | break; |
3241 | case SERVICE_ACTION_IN: | |
3242 | case ACCESS_CONTROL_IN: | |
3243 | case ACCESS_CONTROL_OUT: | |
3244 | case EXTENDED_COPY: | |
3245 | case READ_ATTRIBUTE: | |
3246 | case RECEIVE_COPY_RESULTS: | |
3247 | case WRITE_ATTRIBUTE: | |
3248 | size = (cdb[10] << 24) | (cdb[11] << 16) | | |
3249 | (cdb[12] << 8) | cdb[13]; | |
05d1c7c0 | 3250 | cmd->se_cmd_flags |= SCF_SCSI_CONTROL_SG_IO_CDB; |
c66ac9db NB |
3251 | break; |
3252 | case RECEIVE_DIAGNOSTIC: | |
3253 | case SEND_DIAGNOSTIC: | |
3254 | size = (cdb[3] << 8) | cdb[4]; | |
05d1c7c0 | 3255 | cmd->se_cmd_flags |= SCF_SCSI_CONTROL_SG_IO_CDB; |
c66ac9db NB |
3256 | break; |
3257 | /* #warning FIXME: Figure out correct GPCMD_READ_CD blocksize. */ | |
3258 | #if 0 | |
3259 | case GPCMD_READ_CD: | |
3260 | sectors = (cdb[6] << 16) + (cdb[7] << 8) + cdb[8]; | |
3261 | size = (2336 * sectors); | |
05d1c7c0 | 3262 | cmd->se_cmd_flags |= SCF_SCSI_CONTROL_SG_IO_CDB; |
c66ac9db NB |
3263 | break; |
3264 | #endif | |
3265 | case READ_TOC: | |
3266 | size = cdb[8]; | |
05d1c7c0 | 3267 | cmd->se_cmd_flags |= SCF_SCSI_CONTROL_SG_IO_CDB; |
c66ac9db NB |
3268 | break; |
3269 | case REQUEST_SENSE: | |
3270 | size = cdb[4]; | |
05d1c7c0 | 3271 | cmd->se_cmd_flags |= SCF_SCSI_CONTROL_SG_IO_CDB; |
c66ac9db NB |
3272 | break; |
3273 | case READ_ELEMENT_STATUS: | |
3274 | size = 65536 * cdb[7] + 256 * cdb[8] + cdb[9]; | |
05d1c7c0 | 3275 | cmd->se_cmd_flags |= SCF_SCSI_CONTROL_SG_IO_CDB; |
c66ac9db NB |
3276 | break; |
3277 | case WRITE_BUFFER: | |
3278 | size = (cdb[6] << 16) + (cdb[7] << 8) + cdb[8]; | |
05d1c7c0 | 3279 | cmd->se_cmd_flags |= SCF_SCSI_CONTROL_SG_IO_CDB; |
c66ac9db NB |
3280 | break; |
3281 | case RESERVE: | |
3282 | case RESERVE_10: | |
3283 | /* | |
3284 | * The SPC-2 RESERVE does not contain a size in the SCSI CDB. | |
3285 | * Assume the passthrough or $FABRIC_MOD will tell us about it. | |
3286 | */ | |
3287 | if (cdb[0] == RESERVE_10) | |
3288 | size = (cdb[7] << 8) | cdb[8]; | |
3289 | else | |
3290 | size = cmd->data_length; | |
3291 | ||
3292 | /* | |
3293 | * Setup the legacy emulated handler for SPC-2 and | |
3294 | * >= SPC-3 compatible reservation handling (CRH=1) | |
3295 | * Otherwise, we assume the underlying SCSI logic is | |
3296 | * is running in SPC_PASSTHROUGH, and wants reservations | |
3297 | * emulation disabled. | |
3298 | */ | |
3299 | cmd->transport_emulate_cdb = | |
e3d6f909 | 3300 | (su_dev->t10_pr.res_type != |
c66ac9db | 3301 | SPC_PASSTHROUGH) ? |
e3d6f909 | 3302 | core_scsi2_emulate_crh : NULL; |
c66ac9db NB |
3303 | cmd->se_cmd_flags |= SCF_SCSI_NON_DATA_CDB; |
3304 | break; | |
3305 | case RELEASE: | |
3306 | case RELEASE_10: | |
3307 | /* | |
3308 | * The SPC-2 RELEASE does not contain a size in the SCSI CDB. | |
3309 | * Assume the passthrough or $FABRIC_MOD will tell us about it. | |
3310 | */ | |
3311 | if (cdb[0] == RELEASE_10) | |
3312 | size = (cdb[7] << 8) | cdb[8]; | |
3313 | else | |
3314 | size = cmd->data_length; | |
3315 | ||
3316 | cmd->transport_emulate_cdb = | |
e3d6f909 | 3317 | (su_dev->t10_pr.res_type != |
c66ac9db | 3318 | SPC_PASSTHROUGH) ? |
e3d6f909 | 3319 | core_scsi2_emulate_crh : NULL; |
c66ac9db NB |
3320 | cmd->se_cmd_flags |= SCF_SCSI_NON_DATA_CDB; |
3321 | break; | |
3322 | case SYNCHRONIZE_CACHE: | |
3323 | case 0x91: /* SYNCHRONIZE_CACHE_16: */ | |
3324 | /* | |
3325 | * Extract LBA and range to be flushed for emulated SYNCHRONIZE_CACHE | |
3326 | */ | |
3327 | if (cdb[0] == SYNCHRONIZE_CACHE) { | |
3328 | sectors = transport_get_sectors_10(cdb, cmd, §or_ret); | |
a1d8b49a | 3329 | cmd->t_task_lba = transport_lba_32(cdb); |
c66ac9db NB |
3330 | } else { |
3331 | sectors = transport_get_sectors_16(cdb, cmd, §or_ret); | |
a1d8b49a | 3332 | cmd->t_task_lba = transport_lba_64(cdb); |
c66ac9db NB |
3333 | } |
3334 | if (sector_ret) | |
3335 | goto out_unsupported_cdb; | |
3336 | ||
3337 | size = transport_get_size(sectors, cdb, cmd); | |
3338 | cmd->se_cmd_flags |= SCF_SCSI_NON_DATA_CDB; | |
3339 | ||
3340 | /* | |
3341 | * For TCM/pSCSI passthrough, skip cmd->transport_emulate_cdb() | |
3342 | */ | |
e3d6f909 | 3343 | if (dev->transport->transport_type == TRANSPORT_PLUGIN_PHBA_PDEV) |
c66ac9db NB |
3344 | break; |
3345 | /* | |
3346 | * Set SCF_EMULATE_CDB_ASYNC to ensure asynchronous operation | |
3347 | * for SYNCHRONIZE_CACHE* Immed=1 case in __transport_execute_tasks() | |
3348 | */ | |
3349 | cmd->se_cmd_flags |= SCF_EMULATE_CDB_ASYNC; | |
3350 | /* | |
3351 | * Check to ensure that LBA + Range does not exceed past end of | |
7abbe7f3 | 3352 | * device for IBLOCK and FILEIO ->do_sync_cache() backend calls |
c66ac9db | 3353 | */ |
7abbe7f3 NB |
3354 | if ((cmd->t_task_lba != 0) || (sectors != 0)) { |
3355 | if (transport_cmd_get_valid_sectors(cmd) < 0) | |
3356 | goto out_invalid_cdb_field; | |
3357 | } | |
c66ac9db NB |
3358 | break; |
3359 | case UNMAP: | |
3360 | size = get_unaligned_be16(&cdb[7]); | |
05d1c7c0 | 3361 | cmd->se_cmd_flags |= SCF_SCSI_CONTROL_SG_IO_CDB; |
c66ac9db NB |
3362 | break; |
3363 | case WRITE_SAME_16: | |
3364 | sectors = transport_get_sectors_16(cdb, cmd, §or_ret); | |
3365 | if (sector_ret) | |
3366 | goto out_unsupported_cdb; | |
dd3a5ad8 | 3367 | |
6708bb27 | 3368 | if (sectors) |
12850626 | 3369 | size = transport_get_size(1, cdb, cmd); |
6708bb27 AG |
3370 | else { |
3371 | pr_err("WSNZ=1, WRITE_SAME w/sectors=0 not supported\n"); | |
3372 | goto out_invalid_cdb_field; | |
3373 | } | |
dd3a5ad8 | 3374 | |
5db0753b | 3375 | cmd->t_task_lba = get_unaligned_be64(&cdb[2]); |
706d5860 NB |
3376 | cmd->se_cmd_flags |= SCF_SCSI_CONTROL_SG_IO_CDB; |
3377 | ||
3378 | if (target_check_write_same_discard(&cdb[1], dev) < 0) | |
3379 | goto out_invalid_cdb_field; | |
3380 | break; | |
3381 | case WRITE_SAME: | |
3382 | sectors = transport_get_sectors_10(cdb, cmd, §or_ret); | |
3383 | if (sector_ret) | |
3384 | goto out_unsupported_cdb; | |
3385 | ||
3386 | if (sectors) | |
12850626 | 3387 | size = transport_get_size(1, cdb, cmd); |
706d5860 NB |
3388 | else { |
3389 | pr_err("WSNZ=1, WRITE_SAME w/sectors=0 not supported\n"); | |
3390 | goto out_invalid_cdb_field; | |
c66ac9db | 3391 | } |
706d5860 NB |
3392 | |
3393 | cmd->t_task_lba = get_unaligned_be32(&cdb[2]); | |
c66ac9db | 3394 | cmd->se_cmd_flags |= SCF_SCSI_CONTROL_SG_IO_CDB; |
706d5860 NB |
3395 | /* |
3396 | * Follow sbcr26 with WRITE_SAME (10) and check for the existence | |
3397 | * of byte 1 bit 3 UNMAP instead of original reserved field | |
3398 | */ | |
3399 | if (target_check_write_same_discard(&cdb[1], dev) < 0) | |
3400 | goto out_invalid_cdb_field; | |
c66ac9db NB |
3401 | break; |
3402 | case ALLOW_MEDIUM_REMOVAL: | |
3403 | case GPCMD_CLOSE_TRACK: | |
3404 | case ERASE: | |
3405 | case INITIALIZE_ELEMENT_STATUS: | |
3406 | case GPCMD_LOAD_UNLOAD: | |
3407 | case REZERO_UNIT: | |
3408 | case SEEK_10: | |
3409 | case GPCMD_SET_SPEED: | |
3410 | case SPACE: | |
3411 | case START_STOP: | |
3412 | case TEST_UNIT_READY: | |
3413 | case VERIFY: | |
3414 | case WRITE_FILEMARKS: | |
3415 | case MOVE_MEDIUM: | |
3416 | cmd->se_cmd_flags |= SCF_SCSI_NON_DATA_CDB; | |
3417 | break; | |
3418 | case REPORT_LUNS: | |
3419 | cmd->transport_emulate_cdb = | |
e3d6f909 | 3420 | transport_core_report_lun_response; |
c66ac9db NB |
3421 | size = (cdb[6] << 24) | (cdb[7] << 16) | (cdb[8] << 8) | cdb[9]; |
3422 | /* | |
3423 | * Do implict HEAD_OF_QUEUE processing for REPORT_LUNS | |
3424 | * See spc4r17 section 5.3 | |
3425 | */ | |
5951146d | 3426 | if (cmd->se_dev->dev_task_attr_type == SAM_TASK_ATTR_EMULATED) |
e66ecd50 | 3427 | cmd->sam_task_attr = MSG_HEAD_TAG; |
05d1c7c0 | 3428 | cmd->se_cmd_flags |= SCF_SCSI_CONTROL_SG_IO_CDB; |
c66ac9db NB |
3429 | break; |
3430 | default: | |
6708bb27 | 3431 | pr_warn("TARGET_CORE[%s]: Unsupported SCSI Opcode" |
c66ac9db | 3432 | " 0x%02x, sending CHECK_CONDITION.\n", |
e3d6f909 | 3433 | cmd->se_tfo->get_fabric_name(), cdb[0]); |
c66ac9db NB |
3434 | cmd->transport_wait_for_tasks = &transport_nop_wait_for_tasks; |
3435 | goto out_unsupported_cdb; | |
3436 | } | |
3437 | ||
3438 | if (size != cmd->data_length) { | |
6708bb27 | 3439 | pr_warn("TARGET_CORE[%s]: Expected Transfer Length:" |
c66ac9db | 3440 | " %u does not match SCSI CDB Length: %u for SAM Opcode:" |
e3d6f909 | 3441 | " 0x%02x\n", cmd->se_tfo->get_fabric_name(), |
c66ac9db NB |
3442 | cmd->data_length, size, cdb[0]); |
3443 | ||
3444 | cmd->cmd_spdtl = size; | |
3445 | ||
3446 | if (cmd->data_direction == DMA_TO_DEVICE) { | |
6708bb27 | 3447 | pr_err("Rejecting underflow/overflow" |
c66ac9db NB |
3448 | " WRITE data\n"); |
3449 | goto out_invalid_cdb_field; | |
3450 | } | |
3451 | /* | |
3452 | * Reject READ_* or WRITE_* with overflow/underflow for | |
3453 | * type SCF_SCSI_DATA_SG_IO_CDB. | |
3454 | */ | |
6708bb27 AG |
3455 | if (!ret && (dev->se_sub_dev->se_dev_attrib.block_size != 512)) { |
3456 | pr_err("Failing OVERFLOW/UNDERFLOW for LBA op" | |
c66ac9db | 3457 | " CDB on non 512-byte sector setup subsystem" |
e3d6f909 | 3458 | " plugin: %s\n", dev->transport->name); |
c66ac9db NB |
3459 | /* Returns CHECK_CONDITION + INVALID_CDB_FIELD */ |
3460 | goto out_invalid_cdb_field; | |
3461 | } | |
3462 | ||
3463 | if (size > cmd->data_length) { | |
3464 | cmd->se_cmd_flags |= SCF_OVERFLOW_BIT; | |
3465 | cmd->residual_count = (size - cmd->data_length); | |
3466 | } else { | |
3467 | cmd->se_cmd_flags |= SCF_UNDERFLOW_BIT; | |
3468 | cmd->residual_count = (cmd->data_length - size); | |
3469 | } | |
3470 | cmd->data_length = size; | |
3471 | } | |
3472 | ||
d0229ae3 AG |
3473 | /* Let's limit control cdbs to a page, for simplicity's sake. */ |
3474 | if ((cmd->se_cmd_flags & SCF_SCSI_CONTROL_SG_IO_CDB) && | |
3475 | size > PAGE_SIZE) | |
3476 | goto out_invalid_cdb_field; | |
3477 | ||
c66ac9db NB |
3478 | transport_set_supported_SAM_opcode(cmd); |
3479 | return ret; | |
3480 | ||
3481 | out_unsupported_cdb: | |
3482 | cmd->se_cmd_flags |= SCF_SCSI_CDB_EXCEPTION; | |
3483 | cmd->scsi_sense_reason = TCM_UNSUPPORTED_SCSI_OPCODE; | |
5951146d | 3484 | return -EINVAL; |
c66ac9db NB |
3485 | out_invalid_cdb_field: |
3486 | cmd->se_cmd_flags |= SCF_SCSI_CDB_EXCEPTION; | |
3487 | cmd->scsi_sense_reason = TCM_INVALID_CDB_FIELD; | |
5951146d | 3488 | return -EINVAL; |
c66ac9db NB |
3489 | } |
3490 | ||
c66ac9db NB |
3491 | /* |
3492 | * Called from transport_generic_complete_ok() and | |
3493 | * transport_generic_request_failure() to determine which dormant/delayed | |
3494 | * and ordered cmds need to have their tasks added to the execution queue. | |
3495 | */ | |
3496 | static void transport_complete_task_attr(struct se_cmd *cmd) | |
3497 | { | |
5951146d | 3498 | struct se_device *dev = cmd->se_dev; |
c66ac9db NB |
3499 | struct se_cmd *cmd_p, *cmd_tmp; |
3500 | int new_active_tasks = 0; | |
3501 | ||
e66ecd50 | 3502 | if (cmd->sam_task_attr == MSG_SIMPLE_TAG) { |
c66ac9db NB |
3503 | atomic_dec(&dev->simple_cmds); |
3504 | smp_mb__after_atomic_dec(); | |
3505 | dev->dev_cur_ordered_id++; | |
6708bb27 | 3506 | pr_debug("Incremented dev->dev_cur_ordered_id: %u for" |
c66ac9db NB |
3507 | " SIMPLE: %u\n", dev->dev_cur_ordered_id, |
3508 | cmd->se_ordered_id); | |
e66ecd50 | 3509 | } else if (cmd->sam_task_attr == MSG_HEAD_TAG) { |
c66ac9db NB |
3510 | atomic_dec(&dev->dev_hoq_count); |
3511 | smp_mb__after_atomic_dec(); | |
3512 | dev->dev_cur_ordered_id++; | |
6708bb27 | 3513 | pr_debug("Incremented dev_cur_ordered_id: %u for" |
c66ac9db NB |
3514 | " HEAD_OF_QUEUE: %u\n", dev->dev_cur_ordered_id, |
3515 | cmd->se_ordered_id); | |
e66ecd50 | 3516 | } else if (cmd->sam_task_attr == MSG_ORDERED_TAG) { |
c66ac9db | 3517 | spin_lock(&dev->ordered_cmd_lock); |
5951146d | 3518 | list_del(&cmd->se_ordered_node); |
c66ac9db NB |
3519 | atomic_dec(&dev->dev_ordered_sync); |
3520 | smp_mb__after_atomic_dec(); | |
3521 | spin_unlock(&dev->ordered_cmd_lock); | |
3522 | ||
3523 | dev->dev_cur_ordered_id++; | |
6708bb27 | 3524 | pr_debug("Incremented dev_cur_ordered_id: %u for ORDERED:" |
c66ac9db NB |
3525 | " %u\n", dev->dev_cur_ordered_id, cmd->se_ordered_id); |
3526 | } | |
3527 | /* | |
3528 | * Process all commands up to the last received | |
3529 | * ORDERED task attribute which requires another blocking | |
3530 | * boundary | |
3531 | */ | |
3532 | spin_lock(&dev->delayed_cmd_lock); | |
3533 | list_for_each_entry_safe(cmd_p, cmd_tmp, | |
5951146d | 3534 | &dev->delayed_cmd_list, se_delayed_node) { |
c66ac9db | 3535 | |
5951146d | 3536 | list_del(&cmd_p->se_delayed_node); |
c66ac9db NB |
3537 | spin_unlock(&dev->delayed_cmd_lock); |
3538 | ||
6708bb27 | 3539 | pr_debug("Calling add_tasks() for" |
c66ac9db NB |
3540 | " cmd_p: 0x%02x Task Attr: 0x%02x" |
3541 | " Dormant -> Active, se_ordered_id: %u\n", | |
6708bb27 | 3542 | cmd_p->t_task_cdb[0], |
c66ac9db NB |
3543 | cmd_p->sam_task_attr, cmd_p->se_ordered_id); |
3544 | ||
3545 | transport_add_tasks_from_cmd(cmd_p); | |
3546 | new_active_tasks++; | |
3547 | ||
3548 | spin_lock(&dev->delayed_cmd_lock); | |
e66ecd50 | 3549 | if (cmd_p->sam_task_attr == MSG_ORDERED_TAG) |
c66ac9db NB |
3550 | break; |
3551 | } | |
3552 | spin_unlock(&dev->delayed_cmd_lock); | |
3553 | /* | |
3554 | * If new tasks have become active, wake up the transport thread | |
3555 | * to do the processing of the Active tasks. | |
3556 | */ | |
3557 | if (new_active_tasks != 0) | |
e3d6f909 | 3558 | wake_up_interruptible(&dev->dev_queue_obj.thread_wq); |
c66ac9db NB |
3559 | } |
3560 | ||
07bde79a NB |
3561 | static int transport_complete_qf(struct se_cmd *cmd) |
3562 | { | |
3563 | int ret = 0; | |
3564 | ||
3565 | if (cmd->se_cmd_flags & SCF_TRANSPORT_TASK_SENSE) | |
3566 | return cmd->se_tfo->queue_status(cmd); | |
3567 | ||
3568 | switch (cmd->data_direction) { | |
3569 | case DMA_FROM_DEVICE: | |
3570 | ret = cmd->se_tfo->queue_data_in(cmd); | |
3571 | break; | |
3572 | case DMA_TO_DEVICE: | |
ec98f782 | 3573 | if (cmd->t_bidi_data_sg) { |
07bde79a NB |
3574 | ret = cmd->se_tfo->queue_data_in(cmd); |
3575 | if (ret < 0) | |
3576 | return ret; | |
3577 | } | |
3578 | /* Fall through for DMA_TO_DEVICE */ | |
3579 | case DMA_NONE: | |
3580 | ret = cmd->se_tfo->queue_status(cmd); | |
3581 | break; | |
3582 | default: | |
3583 | break; | |
3584 | } | |
3585 | ||
3586 | return ret; | |
3587 | } | |
3588 | ||
3589 | static void transport_handle_queue_full( | |
3590 | struct se_cmd *cmd, | |
3591 | struct se_device *dev, | |
3592 | int (*qf_callback)(struct se_cmd *)) | |
3593 | { | |
3594 | spin_lock_irq(&dev->qf_cmd_lock); | |
3595 | cmd->se_cmd_flags |= SCF_EMULATE_QUEUE_FULL; | |
3596 | cmd->transport_qf_callback = qf_callback; | |
3597 | list_add_tail(&cmd->se_qf_node, &cmd->se_dev->qf_cmd_list); | |
3598 | atomic_inc(&dev->dev_qf_count); | |
3599 | smp_mb__after_atomic_inc(); | |
3600 | spin_unlock_irq(&cmd->se_dev->qf_cmd_lock); | |
3601 | ||
3602 | schedule_work(&cmd->se_dev->qf_work_queue); | |
3603 | } | |
3604 | ||
c66ac9db NB |
3605 | static void transport_generic_complete_ok(struct se_cmd *cmd) |
3606 | { | |
07bde79a | 3607 | int reason = 0, ret; |
c66ac9db NB |
3608 | /* |
3609 | * Check if we need to move delayed/dormant tasks from cmds on the | |
3610 | * delayed execution list after a HEAD_OF_QUEUE or ORDERED Task | |
3611 | * Attribute. | |
3612 | */ | |
5951146d | 3613 | if (cmd->se_dev->dev_task_attr_type == SAM_TASK_ATTR_EMULATED) |
c66ac9db | 3614 | transport_complete_task_attr(cmd); |
07bde79a NB |
3615 | /* |
3616 | * Check to schedule QUEUE_FULL work, or execute an existing | |
3617 | * cmd->transport_qf_callback() | |
3618 | */ | |
3619 | if (atomic_read(&cmd->se_dev->dev_qf_count) != 0) | |
3620 | schedule_work(&cmd->se_dev->qf_work_queue); | |
3621 | ||
3622 | if (cmd->transport_qf_callback) { | |
3623 | ret = cmd->transport_qf_callback(cmd); | |
3624 | if (ret < 0) | |
3625 | goto queue_full; | |
3626 | ||
3627 | cmd->transport_qf_callback = NULL; | |
3628 | goto done; | |
3629 | } | |
c66ac9db NB |
3630 | /* |
3631 | * Check if we need to retrieve a sense buffer from | |
3632 | * the struct se_cmd in question. | |
3633 | */ | |
3634 | if (cmd->se_cmd_flags & SCF_TRANSPORT_TASK_SENSE) { | |
3635 | if (transport_get_sense_data(cmd) < 0) | |
3636 | reason = TCM_NON_EXISTENT_LUN; | |
3637 | ||
3638 | /* | |
3639 | * Only set when an struct se_task->task_scsi_status returned | |
3640 | * a non GOOD status. | |
3641 | */ | |
3642 | if (cmd->scsi_status) { | |
07bde79a | 3643 | ret = transport_send_check_condition_and_sense( |
c66ac9db | 3644 | cmd, reason, 1); |
07bde79a NB |
3645 | if (ret == -EAGAIN) |
3646 | goto queue_full; | |
3647 | ||
c66ac9db NB |
3648 | transport_lun_remove_cmd(cmd); |
3649 | transport_cmd_check_stop_to_fabric(cmd); | |
3650 | return; | |
3651 | } | |
3652 | } | |
3653 | /* | |
25985edc | 3654 | * Check for a callback, used by amongst other things |
c66ac9db NB |
3655 | * XDWRITE_READ_10 emulation. |
3656 | */ | |
3657 | if (cmd->transport_complete_callback) | |
3658 | cmd->transport_complete_callback(cmd); | |
3659 | ||
3660 | switch (cmd->data_direction) { | |
3661 | case DMA_FROM_DEVICE: | |
3662 | spin_lock(&cmd->se_lun->lun_sep_lock); | |
e3d6f909 AG |
3663 | if (cmd->se_lun->lun_sep) { |
3664 | cmd->se_lun->lun_sep->sep_stats.tx_data_octets += | |
c66ac9db NB |
3665 | cmd->data_length; |
3666 | } | |
3667 | spin_unlock(&cmd->se_lun->lun_sep_lock); | |
c66ac9db | 3668 | |
07bde79a NB |
3669 | ret = cmd->se_tfo->queue_data_in(cmd); |
3670 | if (ret == -EAGAIN) | |
3671 | goto queue_full; | |
c66ac9db NB |
3672 | break; |
3673 | case DMA_TO_DEVICE: | |
3674 | spin_lock(&cmd->se_lun->lun_sep_lock); | |
e3d6f909 AG |
3675 | if (cmd->se_lun->lun_sep) { |
3676 | cmd->se_lun->lun_sep->sep_stats.rx_data_octets += | |
c66ac9db NB |
3677 | cmd->data_length; |
3678 | } | |
3679 | spin_unlock(&cmd->se_lun->lun_sep_lock); | |
3680 | /* | |
3681 | * Check if we need to send READ payload for BIDI-COMMAND | |
3682 | */ | |
ec98f782 | 3683 | if (cmd->t_bidi_data_sg) { |
c66ac9db | 3684 | spin_lock(&cmd->se_lun->lun_sep_lock); |
e3d6f909 AG |
3685 | if (cmd->se_lun->lun_sep) { |
3686 | cmd->se_lun->lun_sep->sep_stats.tx_data_octets += | |
c66ac9db NB |
3687 | cmd->data_length; |
3688 | } | |
3689 | spin_unlock(&cmd->se_lun->lun_sep_lock); | |
07bde79a NB |
3690 | ret = cmd->se_tfo->queue_data_in(cmd); |
3691 | if (ret == -EAGAIN) | |
3692 | goto queue_full; | |
c66ac9db NB |
3693 | break; |
3694 | } | |
3695 | /* Fall through for DMA_TO_DEVICE */ | |
3696 | case DMA_NONE: | |
07bde79a NB |
3697 | ret = cmd->se_tfo->queue_status(cmd); |
3698 | if (ret == -EAGAIN) | |
3699 | goto queue_full; | |
c66ac9db NB |
3700 | break; |
3701 | default: | |
3702 | break; | |
3703 | } | |
3704 | ||
07bde79a | 3705 | done: |
c66ac9db NB |
3706 | transport_lun_remove_cmd(cmd); |
3707 | transport_cmd_check_stop_to_fabric(cmd); | |
07bde79a NB |
3708 | return; |
3709 | ||
3710 | queue_full: | |
6708bb27 | 3711 | pr_debug("Handling complete_ok QUEUE_FULL: se_cmd: %p," |
07bde79a NB |
3712 | " data_direction: %d\n", cmd, cmd->data_direction); |
3713 | transport_handle_queue_full(cmd, cmd->se_dev, transport_complete_qf); | |
c66ac9db NB |
3714 | } |
3715 | ||
3716 | static void transport_free_dev_tasks(struct se_cmd *cmd) | |
3717 | { | |
3718 | struct se_task *task, *task_tmp; | |
3719 | unsigned long flags; | |
3720 | ||
a1d8b49a | 3721 | spin_lock_irqsave(&cmd->t_state_lock, flags); |
c66ac9db | 3722 | list_for_each_entry_safe(task, task_tmp, |
a1d8b49a | 3723 | &cmd->t_task_list, t_list) { |
c66ac9db NB |
3724 | if (atomic_read(&task->task_active)) |
3725 | continue; | |
3726 | ||
3727 | kfree(task->task_sg_bidi); | |
3728 | kfree(task->task_sg); | |
3729 | ||
3730 | list_del(&task->t_list); | |
3731 | ||
a1d8b49a | 3732 | spin_unlock_irqrestore(&cmd->t_state_lock, flags); |
c66ac9db | 3733 | if (task->se_dev) |
e3d6f909 | 3734 | task->se_dev->transport->free_task(task); |
c66ac9db | 3735 | else |
6708bb27 | 3736 | pr_err("task[%u] - task->se_dev is NULL\n", |
c66ac9db | 3737 | task->task_no); |
a1d8b49a | 3738 | spin_lock_irqsave(&cmd->t_state_lock, flags); |
c66ac9db | 3739 | } |
a1d8b49a | 3740 | spin_unlock_irqrestore(&cmd->t_state_lock, flags); |
c66ac9db NB |
3741 | } |
3742 | ||
6708bb27 | 3743 | static inline void transport_free_sgl(struct scatterlist *sgl, int nents) |
c66ac9db | 3744 | { |
ec98f782 | 3745 | struct scatterlist *sg; |
ec98f782 | 3746 | int count; |
c66ac9db | 3747 | |
6708bb27 AG |
3748 | for_each_sg(sgl, sg, nents, count) |
3749 | __free_page(sg_page(sg)); | |
c66ac9db | 3750 | |
6708bb27 AG |
3751 | kfree(sgl); |
3752 | } | |
c66ac9db | 3753 | |
6708bb27 AG |
3754 | static inline void transport_free_pages(struct se_cmd *cmd) |
3755 | { | |
3756 | if (cmd->se_cmd_flags & SCF_PASSTHROUGH_SG_TO_MEM_NOALLOC) | |
3757 | return; | |
3758 | ||
3759 | transport_free_sgl(cmd->t_data_sg, cmd->t_data_nents); | |
ec98f782 AG |
3760 | cmd->t_data_sg = NULL; |
3761 | cmd->t_data_nents = 0; | |
c66ac9db | 3762 | |
6708bb27 | 3763 | transport_free_sgl(cmd->t_bidi_data_sg, cmd->t_bidi_data_nents); |
ec98f782 AG |
3764 | cmd->t_bidi_data_sg = NULL; |
3765 | cmd->t_bidi_data_nents = 0; | |
c66ac9db NB |
3766 | } |
3767 | ||
3768 | static inline void transport_release_tasks(struct se_cmd *cmd) | |
3769 | { | |
3770 | transport_free_dev_tasks(cmd); | |
3771 | } | |
3772 | ||
3773 | static inline int transport_dec_and_check(struct se_cmd *cmd) | |
3774 | { | |
3775 | unsigned long flags; | |
3776 | ||
a1d8b49a AG |
3777 | spin_lock_irqsave(&cmd->t_state_lock, flags); |
3778 | if (atomic_read(&cmd->t_fe_count)) { | |
6708bb27 | 3779 | if (!atomic_dec_and_test(&cmd->t_fe_count)) { |
a1d8b49a | 3780 | spin_unlock_irqrestore(&cmd->t_state_lock, |
c66ac9db NB |
3781 | flags); |
3782 | return 1; | |
3783 | } | |
3784 | } | |
3785 | ||
a1d8b49a | 3786 | if (atomic_read(&cmd->t_se_count)) { |
6708bb27 | 3787 | if (!atomic_dec_and_test(&cmd->t_se_count)) { |
a1d8b49a | 3788 | spin_unlock_irqrestore(&cmd->t_state_lock, |
c66ac9db NB |
3789 | flags); |
3790 | return 1; | |
3791 | } | |
3792 | } | |
a1d8b49a | 3793 | spin_unlock_irqrestore(&cmd->t_state_lock, flags); |
c66ac9db NB |
3794 | |
3795 | return 0; | |
3796 | } | |
3797 | ||
3798 | static void transport_release_fe_cmd(struct se_cmd *cmd) | |
3799 | { | |
3800 | unsigned long flags; | |
3801 | ||
3802 | if (transport_dec_and_check(cmd)) | |
3803 | return; | |
3804 | ||
a1d8b49a | 3805 | spin_lock_irqsave(&cmd->t_state_lock, flags); |
6708bb27 | 3806 | if (!atomic_read(&cmd->transport_dev_active)) { |
a1d8b49a | 3807 | spin_unlock_irqrestore(&cmd->t_state_lock, flags); |
c66ac9db NB |
3808 | goto free_pages; |
3809 | } | |
a1d8b49a | 3810 | atomic_set(&cmd->transport_dev_active, 0); |
c66ac9db | 3811 | transport_all_task_dev_remove_state(cmd); |
a1d8b49a | 3812 | spin_unlock_irqrestore(&cmd->t_state_lock, flags); |
c66ac9db NB |
3813 | |
3814 | transport_release_tasks(cmd); | |
3815 | free_pages: | |
3816 | transport_free_pages(cmd); | |
3817 | transport_free_se_cmd(cmd); | |
35462975 | 3818 | cmd->se_tfo->release_cmd(cmd); |
c66ac9db NB |
3819 | } |
3820 | ||
35462975 CH |
3821 | static int |
3822 | transport_generic_remove(struct se_cmd *cmd, int session_reinstatement) | |
c66ac9db NB |
3823 | { |
3824 | unsigned long flags; | |
3825 | ||
c66ac9db NB |
3826 | if (transport_dec_and_check(cmd)) { |
3827 | if (session_reinstatement) { | |
a1d8b49a | 3828 | spin_lock_irqsave(&cmd->t_state_lock, flags); |
c66ac9db | 3829 | transport_all_task_dev_remove_state(cmd); |
a1d8b49a | 3830 | spin_unlock_irqrestore(&cmd->t_state_lock, |
c66ac9db NB |
3831 | flags); |
3832 | } | |
3833 | return 1; | |
3834 | } | |
3835 | ||
a1d8b49a | 3836 | spin_lock_irqsave(&cmd->t_state_lock, flags); |
6708bb27 | 3837 | if (!atomic_read(&cmd->transport_dev_active)) { |
a1d8b49a | 3838 | spin_unlock_irqrestore(&cmd->t_state_lock, flags); |
c66ac9db NB |
3839 | goto free_pages; |
3840 | } | |
a1d8b49a | 3841 | atomic_set(&cmd->transport_dev_active, 0); |
c66ac9db | 3842 | transport_all_task_dev_remove_state(cmd); |
a1d8b49a | 3843 | spin_unlock_irqrestore(&cmd->t_state_lock, flags); |
c66ac9db NB |
3844 | |
3845 | transport_release_tasks(cmd); | |
5951146d | 3846 | |
c66ac9db NB |
3847 | free_pages: |
3848 | transport_free_pages(cmd); | |
35462975 | 3849 | transport_release_cmd(cmd); |
c66ac9db NB |
3850 | return 0; |
3851 | } | |
3852 | ||
3853 | /* | |
ec98f782 AG |
3854 | * transport_generic_map_mem_to_cmd - Use fabric-alloced pages instead of |
3855 | * allocating in the core. | |
c66ac9db NB |
3856 | * @cmd: Associated se_cmd descriptor |
3857 | * @mem: SGL style memory for TCM WRITE / READ | |
3858 | * @sg_mem_num: Number of SGL elements | |
3859 | * @mem_bidi_in: SGL style memory for TCM BIDI READ | |
3860 | * @sg_mem_bidi_num: Number of BIDI READ SGL elements | |
3861 | * | |
3862 | * Return: nonzero return cmd was rejected for -ENOMEM or inproper usage | |
3863 | * of parameters. | |
3864 | */ | |
3865 | int transport_generic_map_mem_to_cmd( | |
3866 | struct se_cmd *cmd, | |
5951146d AG |
3867 | struct scatterlist *sgl, |
3868 | u32 sgl_count, | |
3869 | struct scatterlist *sgl_bidi, | |
3870 | u32 sgl_bidi_count) | |
c66ac9db | 3871 | { |
5951146d | 3872 | if (!sgl || !sgl_count) |
c66ac9db | 3873 | return 0; |
c66ac9db | 3874 | |
c66ac9db NB |
3875 | if ((cmd->se_cmd_flags & SCF_SCSI_DATA_SG_IO_CDB) || |
3876 | (cmd->se_cmd_flags & SCF_SCSI_CONTROL_SG_IO_CDB)) { | |
c66ac9db | 3877 | |
ec98f782 AG |
3878 | cmd->t_data_sg = sgl; |
3879 | cmd->t_data_nents = sgl_count; | |
c66ac9db | 3880 | |
ec98f782 AG |
3881 | if (sgl_bidi && sgl_bidi_count) { |
3882 | cmd->t_bidi_data_sg = sgl_bidi; | |
3883 | cmd->t_bidi_data_nents = sgl_bidi_count; | |
c66ac9db NB |
3884 | } |
3885 | cmd->se_cmd_flags |= SCF_PASSTHROUGH_SG_TO_MEM_NOALLOC; | |
c66ac9db NB |
3886 | } |
3887 | ||
3888 | return 0; | |
3889 | } | |
3890 | EXPORT_SYMBOL(transport_generic_map_mem_to_cmd); | |
3891 | ||
c66ac9db NB |
3892 | static int transport_new_cmd_obj(struct se_cmd *cmd) |
3893 | { | |
5951146d | 3894 | struct se_device *dev = cmd->se_dev; |
01cde4d5 | 3895 | int set_counts = 1, rc, task_cdbs; |
c66ac9db | 3896 | |
ec98f782 AG |
3897 | /* |
3898 | * Setup any BIDI READ tasks and memory from | |
3899 | * cmd->t_mem_bidi_list so the READ struct se_tasks | |
3900 | * are queued first for the non pSCSI passthrough case. | |
3901 | */ | |
3902 | if (cmd->t_bidi_data_sg && | |
3903 | (dev->transport->transport_type != TRANSPORT_PLUGIN_PHBA_PDEV)) { | |
3904 | rc = transport_allocate_tasks(cmd, | |
3905 | cmd->t_task_lba, | |
3906 | DMA_FROM_DEVICE, | |
3907 | cmd->t_bidi_data_sg, | |
3908 | cmd->t_bidi_data_nents); | |
6708bb27 | 3909 | if (rc <= 0) { |
c66ac9db NB |
3910 | cmd->se_cmd_flags |= SCF_SCSI_CDB_EXCEPTION; |
3911 | cmd->scsi_sense_reason = | |
ec98f782 | 3912 | TCM_LOGICAL_UNIT_COMMUNICATION_FAILURE; |
01cde4d5 | 3913 | return -EINVAL; |
c66ac9db | 3914 | } |
ec98f782 AG |
3915 | atomic_inc(&cmd->t_fe_count); |
3916 | atomic_inc(&cmd->t_se_count); | |
3917 | set_counts = 0; | |
3918 | } | |
3919 | /* | |
3920 | * Setup the tasks and memory from cmd->t_mem_list | |
3921 | * Note for BIDI transfers this will contain the WRITE payload | |
3922 | */ | |
3923 | task_cdbs = transport_allocate_tasks(cmd, | |
3924 | cmd->t_task_lba, | |
3925 | cmd->data_direction, | |
3926 | cmd->t_data_sg, | |
3927 | cmd->t_data_nents); | |
6708bb27 | 3928 | if (task_cdbs <= 0) { |
ec98f782 AG |
3929 | cmd->se_cmd_flags |= SCF_SCSI_CDB_EXCEPTION; |
3930 | cmd->scsi_sense_reason = | |
3931 | TCM_LOGICAL_UNIT_COMMUNICATION_FAILURE; | |
01cde4d5 | 3932 | return -EINVAL; |
ec98f782 | 3933 | } |
c66ac9db | 3934 | |
ec98f782 AG |
3935 | if (set_counts) { |
3936 | atomic_inc(&cmd->t_fe_count); | |
3937 | atomic_inc(&cmd->t_se_count); | |
c66ac9db NB |
3938 | } |
3939 | ||
ec98f782 AG |
3940 | cmd->t_task_list_num = task_cdbs; |
3941 | ||
a1d8b49a AG |
3942 | atomic_set(&cmd->t_task_cdbs_left, task_cdbs); |
3943 | atomic_set(&cmd->t_task_cdbs_ex_left, task_cdbs); | |
3944 | atomic_set(&cmd->t_task_cdbs_timeout_left, task_cdbs); | |
c66ac9db NB |
3945 | return 0; |
3946 | } | |
3947 | ||
05d1c7c0 AG |
3948 | void *transport_kmap_first_data_page(struct se_cmd *cmd) |
3949 | { | |
ec98f782 | 3950 | struct scatterlist *sg = cmd->t_data_sg; |
05d1c7c0 | 3951 | |
ec98f782 | 3952 | BUG_ON(!sg); |
05d1c7c0 | 3953 | /* |
ec98f782 AG |
3954 | * We need to take into account a possible offset here for fabrics like |
3955 | * tcm_loop who may be using a contig buffer from the SCSI midlayer for | |
3956 | * control CDBs passed as SGLs via transport_generic_map_mem_to_cmd() | |
05d1c7c0 | 3957 | */ |
ec98f782 | 3958 | return kmap(sg_page(sg)) + sg->offset; |
05d1c7c0 AG |
3959 | } |
3960 | EXPORT_SYMBOL(transport_kmap_first_data_page); | |
3961 | ||
3962 | void transport_kunmap_first_data_page(struct se_cmd *cmd) | |
3963 | { | |
ec98f782 | 3964 | kunmap(sg_page(cmd->t_data_sg)); |
05d1c7c0 AG |
3965 | } |
3966 | EXPORT_SYMBOL(transport_kunmap_first_data_page); | |
3967 | ||
c66ac9db | 3968 | static int |
05d1c7c0 | 3969 | transport_generic_get_mem(struct se_cmd *cmd) |
c66ac9db | 3970 | { |
ec98f782 AG |
3971 | u32 length = cmd->data_length; |
3972 | unsigned int nents; | |
3973 | struct page *page; | |
3974 | int i = 0; | |
c66ac9db | 3975 | |
ec98f782 AG |
3976 | nents = DIV_ROUND_UP(length, PAGE_SIZE); |
3977 | cmd->t_data_sg = kmalloc(sizeof(struct scatterlist) * nents, GFP_KERNEL); | |
3978 | if (!cmd->t_data_sg) | |
3979 | return -ENOMEM; | |
c66ac9db | 3980 | |
ec98f782 AG |
3981 | cmd->t_data_nents = nents; |
3982 | sg_init_table(cmd->t_data_sg, nents); | |
c66ac9db | 3983 | |
ec98f782 AG |
3984 | while (length) { |
3985 | u32 page_len = min_t(u32, length, PAGE_SIZE); | |
3986 | page = alloc_page(GFP_KERNEL | __GFP_ZERO); | |
3987 | if (!page) | |
3988 | goto out; | |
c66ac9db | 3989 | |
ec98f782 AG |
3990 | sg_set_page(&cmd->t_data_sg[i], page, page_len, 0); |
3991 | length -= page_len; | |
3992 | i++; | |
c66ac9db | 3993 | } |
c66ac9db | 3994 | return 0; |
c66ac9db | 3995 | |
ec98f782 AG |
3996 | out: |
3997 | while (i >= 0) { | |
3998 | __free_page(sg_page(&cmd->t_data_sg[i])); | |
3999 | i--; | |
c66ac9db | 4000 | } |
ec98f782 AG |
4001 | kfree(cmd->t_data_sg); |
4002 | cmd->t_data_sg = NULL; | |
4003 | return -ENOMEM; | |
c66ac9db NB |
4004 | } |
4005 | ||
a1d8b49a AG |
4006 | /* Reduce sectors if they are too long for the device */ |
4007 | static inline sector_t transport_limit_task_sectors( | |
c66ac9db NB |
4008 | struct se_device *dev, |
4009 | unsigned long long lba, | |
a1d8b49a | 4010 | sector_t sectors) |
c66ac9db | 4011 | { |
a1d8b49a | 4012 | sectors = min_t(sector_t, sectors, dev->se_sub_dev->se_dev_attrib.max_sectors); |
c66ac9db | 4013 | |
a1d8b49a AG |
4014 | if (dev->transport->get_device_type(dev) == TYPE_DISK) |
4015 | if ((lba + sectors) > transport_dev_end_lba(dev)) | |
4016 | sectors = ((transport_dev_end_lba(dev) - lba) + 1); | |
c66ac9db | 4017 | |
a1d8b49a | 4018 | return sectors; |
c66ac9db NB |
4019 | } |
4020 | ||
c66ac9db NB |
4021 | |
4022 | /* | |
4023 | * This function can be used by HW target mode drivers to create a linked | |
4024 | * scatterlist from all contiguously allocated struct se_task->task_sg[]. | |
4025 | * This is intended to be called during the completion path by TCM Core | |
4026 | * when struct target_core_fabric_ops->check_task_sg_chaining is enabled. | |
4027 | */ | |
4028 | void transport_do_task_sg_chain(struct se_cmd *cmd) | |
4029 | { | |
ec98f782 AG |
4030 | struct scatterlist *sg_first = NULL; |
4031 | struct scatterlist *sg_prev = NULL; | |
4032 | int sg_prev_nents = 0; | |
4033 | struct scatterlist *sg; | |
c66ac9db | 4034 | struct se_task *task; |
ec98f782 | 4035 | u32 chained_nents = 0; |
c66ac9db NB |
4036 | int i; |
4037 | ||
ec98f782 AG |
4038 | BUG_ON(!cmd->se_tfo->task_sg_chaining); |
4039 | ||
c66ac9db NB |
4040 | /* |
4041 | * Walk the struct se_task list and setup scatterlist chains | |
a1d8b49a | 4042 | * for each contiguously allocated struct se_task->task_sg[]. |
c66ac9db | 4043 | */ |
a1d8b49a | 4044 | list_for_each_entry(task, &cmd->t_task_list, t_list) { |
ec98f782 | 4045 | if (!task->task_sg) |
c66ac9db NB |
4046 | continue; |
4047 | ||
ec98f782 AG |
4048 | if (!sg_first) { |
4049 | sg_first = task->task_sg; | |
6708bb27 | 4050 | chained_nents = task->task_sg_nents; |
97868c89 | 4051 | } else { |
ec98f782 | 4052 | sg_chain(sg_prev, sg_prev_nents, task->task_sg); |
6708bb27 | 4053 | chained_nents += task->task_sg_nents; |
97868c89 | 4054 | } |
c3c74c7a NB |
4055 | /* |
4056 | * For the padded tasks, use the extra SGL vector allocated | |
4057 | * in transport_allocate_data_tasks() for the sg_prev_nents | |
4058 | * offset into sg_chain() above.. The last task of a | |
4059 | * multi-task list, or a single task will not have | |
4060 | * task->task_sg_padded set.. | |
4061 | */ | |
4062 | if (task->task_padded_sg) | |
4063 | sg_prev_nents = (task->task_sg_nents + 1); | |
4064 | else | |
4065 | sg_prev_nents = task->task_sg_nents; | |
ec98f782 AG |
4066 | |
4067 | sg_prev = task->task_sg; | |
c66ac9db NB |
4068 | } |
4069 | /* | |
4070 | * Setup the starting pointer and total t_tasks_sg_linked_no including | |
4071 | * padding SGs for linking and to mark the end. | |
4072 | */ | |
a1d8b49a | 4073 | cmd->t_tasks_sg_chained = sg_first; |
ec98f782 | 4074 | cmd->t_tasks_sg_chained_no = chained_nents; |
c66ac9db | 4075 | |
6708bb27 | 4076 | pr_debug("Setup cmd: %p cmd->t_tasks_sg_chained: %p and" |
a1d8b49a AG |
4077 | " t_tasks_sg_chained_no: %u\n", cmd, cmd->t_tasks_sg_chained, |
4078 | cmd->t_tasks_sg_chained_no); | |
c66ac9db | 4079 | |
a1d8b49a AG |
4080 | for_each_sg(cmd->t_tasks_sg_chained, sg, |
4081 | cmd->t_tasks_sg_chained_no, i) { | |
c66ac9db | 4082 | |
6708bb27 | 4083 | pr_debug("SG[%d]: %p page: %p length: %d offset: %d\n", |
5951146d | 4084 | i, sg, sg_page(sg), sg->length, sg->offset); |
c66ac9db | 4085 | if (sg_is_chain(sg)) |
6708bb27 | 4086 | pr_debug("SG: %p sg_is_chain=1\n", sg); |
c66ac9db | 4087 | if (sg_is_last(sg)) |
6708bb27 | 4088 | pr_debug("SG: %p sg_is_last=1\n", sg); |
c66ac9db | 4089 | } |
c66ac9db NB |
4090 | } |
4091 | EXPORT_SYMBOL(transport_do_task_sg_chain); | |
4092 | ||
a1d8b49a AG |
4093 | /* |
4094 | * Break up cmd into chunks transport can handle | |
4095 | */ | |
ec98f782 | 4096 | static int transport_allocate_data_tasks( |
c66ac9db NB |
4097 | struct se_cmd *cmd, |
4098 | unsigned long long lba, | |
c66ac9db | 4099 | enum dma_data_direction data_direction, |
ec98f782 AG |
4100 | struct scatterlist *sgl, |
4101 | unsigned int sgl_nents) | |
c66ac9db NB |
4102 | { |
4103 | unsigned char *cdb = NULL; | |
4104 | struct se_task *task; | |
5951146d | 4105 | struct se_device *dev = cmd->se_dev; |
ec98f782 | 4106 | unsigned long flags; |
1d20bb61 | 4107 | int task_count, i, ret; |
277c5f27 | 4108 | sector_t sectors, dev_max_sectors = dev->se_sub_dev->se_dev_attrib.max_sectors; |
ec98f782 AG |
4109 | u32 sector_size = dev->se_sub_dev->se_dev_attrib.block_size; |
4110 | struct scatterlist *sg; | |
4111 | struct scatterlist *cmd_sg; | |
a1d8b49a | 4112 | |
ec98f782 AG |
4113 | WARN_ON(cmd->data_length % sector_size); |
4114 | sectors = DIV_ROUND_UP(cmd->data_length, sector_size); | |
277c5f27 NB |
4115 | task_count = DIV_ROUND_UP_SECTOR_T(sectors, dev_max_sectors); |
4116 | ||
ec98f782 AG |
4117 | cmd_sg = sgl; |
4118 | for (i = 0; i < task_count; i++) { | |
c3c74c7a | 4119 | unsigned int task_size, task_sg_nents_padded; |
ec98f782 | 4120 | int count; |
a1d8b49a | 4121 | |
c66ac9db | 4122 | task = transport_generic_get_task(cmd, data_direction); |
a1d8b49a | 4123 | if (!task) |
ec98f782 | 4124 | return -ENOMEM; |
c66ac9db | 4125 | |
c66ac9db | 4126 | task->task_lba = lba; |
ec98f782 AG |
4127 | task->task_sectors = min(sectors, dev_max_sectors); |
4128 | task->task_size = task->task_sectors * sector_size; | |
c66ac9db | 4129 | |
e3d6f909 | 4130 | cdb = dev->transport->get_cdb(task); |
a1d8b49a AG |
4131 | BUG_ON(!cdb); |
4132 | ||
4133 | memcpy(cdb, cmd->t_task_cdb, | |
4134 | scsi_command_size(cmd->t_task_cdb)); | |
4135 | ||
4136 | /* Update new cdb with updated lba/sectors */ | |
3a867205 | 4137 | cmd->transport_split_cdb(task->task_lba, task->task_sectors, cdb); |
525a48a2 NB |
4138 | /* |
4139 | * This now assumes that passed sg_ents are in PAGE_SIZE chunks | |
4140 | * in order to calculate the number per task SGL entries | |
4141 | */ | |
4142 | task->task_sg_nents = DIV_ROUND_UP(task->task_size, PAGE_SIZE); | |
c66ac9db | 4143 | /* |
ec98f782 AG |
4144 | * Check if the fabric module driver is requesting that all |
4145 | * struct se_task->task_sg[] be chained together.. If so, | |
4146 | * then allocate an extra padding SG entry for linking and | |
c3c74c7a NB |
4147 | * marking the end of the chained SGL for every task except |
4148 | * the last one for (task_count > 1) operation, or skipping | |
4149 | * the extra padding for the (task_count == 1) case. | |
c66ac9db | 4150 | */ |
c3c74c7a NB |
4151 | if (cmd->se_tfo->task_sg_chaining && (i < (task_count - 1))) { |
4152 | task_sg_nents_padded = (task->task_sg_nents + 1); | |
ec98f782 | 4153 | task->task_padded_sg = 1; |
c3c74c7a NB |
4154 | } else |
4155 | task_sg_nents_padded = task->task_sg_nents; | |
c66ac9db | 4156 | |
1d20bb61 | 4157 | task->task_sg = kmalloc(sizeof(struct scatterlist) * |
c3c74c7a | 4158 | task_sg_nents_padded, GFP_KERNEL); |
ec98f782 AG |
4159 | if (!task->task_sg) { |
4160 | cmd->se_dev->transport->free_task(task); | |
4161 | return -ENOMEM; | |
4162 | } | |
4163 | ||
c3c74c7a | 4164 | sg_init_table(task->task_sg, task_sg_nents_padded); |
c66ac9db | 4165 | |
ec98f782 AG |
4166 | task_size = task->task_size; |
4167 | ||
4168 | /* Build new sgl, only up to task_size */ | |
6708bb27 | 4169 | for_each_sg(task->task_sg, sg, task->task_sg_nents, count) { |
ec98f782 AG |
4170 | if (cmd_sg->length > task_size) |
4171 | break; | |
4172 | ||
4173 | *sg = *cmd_sg; | |
4174 | task_size -= cmd_sg->length; | |
4175 | cmd_sg = sg_next(cmd_sg); | |
c66ac9db | 4176 | } |
c66ac9db | 4177 | |
ec98f782 AG |
4178 | lba += task->task_sectors; |
4179 | sectors -= task->task_sectors; | |
c66ac9db | 4180 | |
ec98f782 AG |
4181 | spin_lock_irqsave(&cmd->t_state_lock, flags); |
4182 | list_add_tail(&task->t_list, &cmd->t_task_list); | |
4183 | spin_unlock_irqrestore(&cmd->t_state_lock, flags); | |
c66ac9db | 4184 | } |
1d20bb61 NB |
4185 | /* |
4186 | * Now perform the memory map of task->task_sg[] into backend | |
4187 | * subsystem memory.. | |
4188 | */ | |
4189 | list_for_each_entry(task, &cmd->t_task_list, t_list) { | |
4190 | if (atomic_read(&task->task_sent)) | |
4191 | continue; | |
4192 | if (!dev->transport->map_data_SG) | |
4193 | continue; | |
4194 | ||
4195 | ret = dev->transport->map_data_SG(task); | |
4196 | if (ret < 0) | |
4197 | return 0; | |
4198 | } | |
c66ac9db | 4199 | |
ec98f782 | 4200 | return task_count; |
c66ac9db NB |
4201 | } |
4202 | ||
4203 | static int | |
ec98f782 | 4204 | transport_allocate_control_task(struct se_cmd *cmd) |
c66ac9db | 4205 | { |
5951146d | 4206 | struct se_device *dev = cmd->se_dev; |
c66ac9db NB |
4207 | unsigned char *cdb; |
4208 | struct se_task *task; | |
ec98f782 | 4209 | unsigned long flags; |
6708bb27 | 4210 | int ret = 0; |
c66ac9db NB |
4211 | |
4212 | task = transport_generic_get_task(cmd, cmd->data_direction); | |
4213 | if (!task) | |
ec98f782 | 4214 | return -ENOMEM; |
c66ac9db | 4215 | |
e3d6f909 | 4216 | cdb = dev->transport->get_cdb(task); |
a1d8b49a AG |
4217 | BUG_ON(!cdb); |
4218 | memcpy(cdb, cmd->t_task_cdb, | |
4219 | scsi_command_size(cmd->t_task_cdb)); | |
c66ac9db | 4220 | |
ec98f782 AG |
4221 | task->task_sg = kmalloc(sizeof(struct scatterlist) * cmd->t_data_nents, |
4222 | GFP_KERNEL); | |
4223 | if (!task->task_sg) { | |
4224 | cmd->se_dev->transport->free_task(task); | |
4225 | return -ENOMEM; | |
4226 | } | |
4227 | ||
4228 | memcpy(task->task_sg, cmd->t_data_sg, | |
4229 | sizeof(struct scatterlist) * cmd->t_data_nents); | |
c66ac9db | 4230 | task->task_size = cmd->data_length; |
6708bb27 | 4231 | task->task_sg_nents = cmd->t_data_nents; |
c66ac9db | 4232 | |
ec98f782 AG |
4233 | spin_lock_irqsave(&cmd->t_state_lock, flags); |
4234 | list_add_tail(&task->t_list, &cmd->t_task_list); | |
4235 | spin_unlock_irqrestore(&cmd->t_state_lock, flags); | |
c66ac9db NB |
4236 | |
4237 | if (cmd->se_cmd_flags & SCF_SCSI_CONTROL_SG_IO_CDB) { | |
1d20bb61 NB |
4238 | if (dev->transport->map_control_SG) |
4239 | ret = dev->transport->map_control_SG(task); | |
c66ac9db NB |
4240 | } else if (cmd->se_cmd_flags & SCF_SCSI_NON_DATA_CDB) { |
4241 | if (dev->transport->cdb_none) | |
6708bb27 | 4242 | ret = dev->transport->cdb_none(task); |
c66ac9db | 4243 | } else { |
6708bb27 | 4244 | pr_err("target: Unknown control cmd type!\n"); |
c66ac9db | 4245 | BUG(); |
ec98f782 | 4246 | } |
6708bb27 AG |
4247 | |
4248 | /* Success! Return number of tasks allocated */ | |
4249 | if (ret == 0) | |
4250 | return 1; | |
4251 | return ret; | |
ec98f782 AG |
4252 | } |
4253 | ||
4254 | static u32 transport_allocate_tasks( | |
4255 | struct se_cmd *cmd, | |
4256 | unsigned long long lba, | |
4257 | enum dma_data_direction data_direction, | |
4258 | struct scatterlist *sgl, | |
4259 | unsigned int sgl_nents) | |
4260 | { | |
01cde4d5 NB |
4261 | if (cmd->se_cmd_flags & SCF_SCSI_DATA_SG_IO_CDB) { |
4262 | if (transport_cmd_get_valid_sectors(cmd) < 0) | |
4263 | return -EINVAL; | |
4264 | ||
ec98f782 AG |
4265 | return transport_allocate_data_tasks(cmd, lba, data_direction, |
4266 | sgl, sgl_nents); | |
01cde4d5 | 4267 | } else |
6708bb27 AG |
4268 | return transport_allocate_control_task(cmd); |
4269 | ||
c66ac9db NB |
4270 | } |
4271 | ||
ec98f782 | 4272 | |
c66ac9db NB |
4273 | /* transport_generic_new_cmd(): Called from transport_processing_thread() |
4274 | * | |
4275 | * Allocate storage transport resources from a set of values predefined | |
4276 | * by transport_generic_cmd_sequencer() from the iSCSI Target RX process. | |
4277 | * Any non zero return here is treated as an "out of resource' op here. | |
4278 | */ | |
4279 | /* | |
4280 | * Generate struct se_task(s) and/or their payloads for this CDB. | |
4281 | */ | |
a1d8b49a | 4282 | int transport_generic_new_cmd(struct se_cmd *cmd) |
c66ac9db | 4283 | { |
c66ac9db NB |
4284 | int ret = 0; |
4285 | ||
4286 | /* | |
4287 | * Determine is the TCM fabric module has already allocated physical | |
4288 | * memory, and is directly calling transport_generic_map_mem_to_cmd() | |
ec98f782 | 4289 | * beforehand. |
c66ac9db | 4290 | */ |
ec98f782 AG |
4291 | if (!(cmd->se_cmd_flags & SCF_PASSTHROUGH_SG_TO_MEM_NOALLOC) && |
4292 | cmd->data_length) { | |
05d1c7c0 | 4293 | ret = transport_generic_get_mem(cmd); |
c66ac9db NB |
4294 | if (ret < 0) |
4295 | return ret; | |
4296 | } | |
1d20bb61 NB |
4297 | /* |
4298 | * Call transport_new_cmd_obj() to invoke transport_allocate_tasks() for | |
4299 | * control or data CDB types, and perform the map to backend subsystem | |
4300 | * code from SGL memory allocated here by transport_generic_get_mem(), or | |
4301 | * via pre-existing SGL memory setup explictly by fabric module code with | |
4302 | * transport_generic_map_mem_to_cmd(). | |
4303 | */ | |
c66ac9db NB |
4304 | ret = transport_new_cmd_obj(cmd); |
4305 | if (ret < 0) | |
4306 | return ret; | |
c66ac9db | 4307 | /* |
a1d8b49a | 4308 | * For WRITEs, let the fabric know its buffer is ready.. |
c66ac9db NB |
4309 | * This WRITE struct se_cmd (and all of its associated struct se_task's) |
4310 | * will be added to the struct se_device execution queue after its WRITE | |
4311 | * data has arrived. (ie: It gets handled by the transport processing | |
4312 | * thread a second time) | |
4313 | */ | |
4314 | if (cmd->data_direction == DMA_TO_DEVICE) { | |
4315 | transport_add_tasks_to_state_queue(cmd); | |
4316 | return transport_generic_write_pending(cmd); | |
4317 | } | |
4318 | /* | |
4319 | * Everything else but a WRITE, add the struct se_cmd's struct se_task's | |
4320 | * to the execution queue. | |
4321 | */ | |
4322 | transport_execute_tasks(cmd); | |
4323 | return 0; | |
4324 | } | |
a1d8b49a | 4325 | EXPORT_SYMBOL(transport_generic_new_cmd); |
c66ac9db NB |
4326 | |
4327 | /* transport_generic_process_write(): | |
4328 | * | |
4329 | * | |
4330 | */ | |
4331 | void transport_generic_process_write(struct se_cmd *cmd) | |
4332 | { | |
c66ac9db NB |
4333 | transport_execute_tasks(cmd); |
4334 | } | |
4335 | EXPORT_SYMBOL(transport_generic_process_write); | |
4336 | ||
07bde79a NB |
4337 | static int transport_write_pending_qf(struct se_cmd *cmd) |
4338 | { | |
4339 | return cmd->se_tfo->write_pending(cmd); | |
4340 | } | |
4341 | ||
c66ac9db NB |
4342 | /* transport_generic_write_pending(): |
4343 | * | |
4344 | * | |
4345 | */ | |
4346 | static int transport_generic_write_pending(struct se_cmd *cmd) | |
4347 | { | |
4348 | unsigned long flags; | |
4349 | int ret; | |
4350 | ||
a1d8b49a | 4351 | spin_lock_irqsave(&cmd->t_state_lock, flags); |
c66ac9db | 4352 | cmd->t_state = TRANSPORT_WRITE_PENDING; |
a1d8b49a | 4353 | spin_unlock_irqrestore(&cmd->t_state_lock, flags); |
07bde79a NB |
4354 | |
4355 | if (cmd->transport_qf_callback) { | |
4356 | ret = cmd->transport_qf_callback(cmd); | |
4357 | if (ret == -EAGAIN) | |
4358 | goto queue_full; | |
4359 | else if (ret < 0) | |
4360 | return ret; | |
4361 | ||
4362 | cmd->transport_qf_callback = NULL; | |
4363 | return 0; | |
4364 | } | |
05d1c7c0 | 4365 | |
c66ac9db NB |
4366 | /* |
4367 | * Clear the se_cmd for WRITE_PENDING status in order to set | |
a1d8b49a | 4368 | * cmd->t_transport_active=0 so that transport_generic_handle_data |
c66ac9db | 4369 | * can be called from HW target mode interrupt code. This is safe |
e3d6f909 | 4370 | * to be called with transport_off=1 before the cmd->se_tfo->write_pending |
c66ac9db NB |
4371 | * because the se_cmd->se_lun pointer is not being cleared. |
4372 | */ | |
4373 | transport_cmd_check_stop(cmd, 1, 0); | |
4374 | ||
4375 | /* | |
4376 | * Call the fabric write_pending function here to let the | |
4377 | * frontend know that WRITE buffers are ready. | |
4378 | */ | |
e3d6f909 | 4379 | ret = cmd->se_tfo->write_pending(cmd); |
07bde79a NB |
4380 | if (ret == -EAGAIN) |
4381 | goto queue_full; | |
4382 | else if (ret < 0) | |
c66ac9db NB |
4383 | return ret; |
4384 | ||
4385 | return PYX_TRANSPORT_WRITE_PENDING; | |
07bde79a NB |
4386 | |
4387 | queue_full: | |
6708bb27 | 4388 | pr_debug("Handling write_pending QUEUE__FULL: se_cmd: %p\n", cmd); |
07bde79a NB |
4389 | cmd->t_state = TRANSPORT_COMPLETE_QF_WP; |
4390 | transport_handle_queue_full(cmd, cmd->se_dev, | |
4391 | transport_write_pending_qf); | |
4392 | return ret; | |
c66ac9db NB |
4393 | } |
4394 | ||
35462975 | 4395 | void transport_release_cmd(struct se_cmd *cmd) |
c66ac9db | 4396 | { |
e3d6f909 | 4397 | BUG_ON(!cmd->se_tfo); |
c66ac9db NB |
4398 | |
4399 | transport_free_se_cmd(cmd); | |
35462975 | 4400 | cmd->se_tfo->release_cmd(cmd); |
c66ac9db | 4401 | } |
35462975 | 4402 | EXPORT_SYMBOL(transport_release_cmd); |
c66ac9db NB |
4403 | |
4404 | /* transport_generic_free_cmd(): | |
4405 | * | |
4406 | * Called from processing frontend to release storage engine resources | |
4407 | */ | |
4408 | void transport_generic_free_cmd( | |
4409 | struct se_cmd *cmd, | |
4410 | int wait_for_tasks, | |
c66ac9db NB |
4411 | int session_reinstatement) |
4412 | { | |
5951146d | 4413 | if (!(cmd->se_cmd_flags & SCF_SE_LUN_CMD)) |
35462975 | 4414 | transport_release_cmd(cmd); |
c66ac9db NB |
4415 | else { |
4416 | core_dec_lacl_count(cmd->se_sess->se_node_acl, cmd); | |
4417 | ||
e3d6f909 | 4418 | if (cmd->se_lun) { |
c66ac9db | 4419 | #if 0 |
6708bb27 | 4420 | pr_debug("cmd: %p ITT: 0x%08x contains" |
e3d6f909 AG |
4421 | " cmd->se_lun\n", cmd, |
4422 | cmd->se_tfo->get_task_tag(cmd)); | |
c66ac9db NB |
4423 | #endif |
4424 | transport_lun_remove_cmd(cmd); | |
4425 | } | |
4426 | ||
4427 | if (wait_for_tasks && cmd->transport_wait_for_tasks) | |
4428 | cmd->transport_wait_for_tasks(cmd, 0, 0); | |
4429 | ||
f4366772 NB |
4430 | transport_free_dev_tasks(cmd); |
4431 | ||
35462975 | 4432 | transport_generic_remove(cmd, session_reinstatement); |
c66ac9db NB |
4433 | } |
4434 | } | |
4435 | EXPORT_SYMBOL(transport_generic_free_cmd); | |
4436 | ||
4437 | static void transport_nop_wait_for_tasks( | |
4438 | struct se_cmd *cmd, | |
4439 | int remove_cmd, | |
4440 | int session_reinstatement) | |
4441 | { | |
4442 | return; | |
4443 | } | |
4444 | ||
4445 | /* transport_lun_wait_for_tasks(): | |
4446 | * | |
4447 | * Called from ConfigFS context to stop the passed struct se_cmd to allow | |
4448 | * an struct se_lun to be successfully shutdown. | |
4449 | */ | |
4450 | static int transport_lun_wait_for_tasks(struct se_cmd *cmd, struct se_lun *lun) | |
4451 | { | |
4452 | unsigned long flags; | |
4453 | int ret; | |
4454 | /* | |
4455 | * If the frontend has already requested this struct se_cmd to | |
4456 | * be stopped, we can safely ignore this struct se_cmd. | |
4457 | */ | |
a1d8b49a AG |
4458 | spin_lock_irqsave(&cmd->t_state_lock, flags); |
4459 | if (atomic_read(&cmd->t_transport_stop)) { | |
4460 | atomic_set(&cmd->transport_lun_stop, 0); | |
6708bb27 | 4461 | pr_debug("ConfigFS ITT[0x%08x] - t_transport_stop ==" |
e3d6f909 | 4462 | " TRUE, skipping\n", cmd->se_tfo->get_task_tag(cmd)); |
a1d8b49a | 4463 | spin_unlock_irqrestore(&cmd->t_state_lock, flags); |
c66ac9db | 4464 | transport_cmd_check_stop(cmd, 1, 0); |
e3d6f909 | 4465 | return -EPERM; |
c66ac9db | 4466 | } |
a1d8b49a AG |
4467 | atomic_set(&cmd->transport_lun_fe_stop, 1); |
4468 | spin_unlock_irqrestore(&cmd->t_state_lock, flags); | |
c66ac9db | 4469 | |
5951146d | 4470 | wake_up_interruptible(&cmd->se_dev->dev_queue_obj.thread_wq); |
c66ac9db NB |
4471 | |
4472 | ret = transport_stop_tasks_for_cmd(cmd); | |
4473 | ||
6708bb27 AG |
4474 | pr_debug("ConfigFS: cmd: %p t_tasks: %d stop tasks ret:" |
4475 | " %d\n", cmd, cmd->t_task_list_num, ret); | |
c66ac9db | 4476 | if (!ret) { |
6708bb27 | 4477 | pr_debug("ConfigFS: ITT[0x%08x] - stopping cmd....\n", |
e3d6f909 | 4478 | cmd->se_tfo->get_task_tag(cmd)); |
a1d8b49a | 4479 | wait_for_completion(&cmd->transport_lun_stop_comp); |
6708bb27 | 4480 | pr_debug("ConfigFS: ITT[0x%08x] - stopped cmd....\n", |
e3d6f909 | 4481 | cmd->se_tfo->get_task_tag(cmd)); |
c66ac9db | 4482 | } |
5951146d | 4483 | transport_remove_cmd_from_queue(cmd, &cmd->se_dev->dev_queue_obj); |
c66ac9db NB |
4484 | |
4485 | return 0; | |
4486 | } | |
4487 | ||
c66ac9db NB |
4488 | static void __transport_clear_lun_from_sessions(struct se_lun *lun) |
4489 | { | |
4490 | struct se_cmd *cmd = NULL; | |
4491 | unsigned long lun_flags, cmd_flags; | |
4492 | /* | |
4493 | * Do exception processing and return CHECK_CONDITION status to the | |
4494 | * Initiator Port. | |
4495 | */ | |
4496 | spin_lock_irqsave(&lun->lun_cmd_lock, lun_flags); | |
5951146d AG |
4497 | while (!list_empty(&lun->lun_cmd_list)) { |
4498 | cmd = list_first_entry(&lun->lun_cmd_list, | |
4499 | struct se_cmd, se_lun_node); | |
4500 | list_del(&cmd->se_lun_node); | |
4501 | ||
a1d8b49a | 4502 | atomic_set(&cmd->transport_lun_active, 0); |
c66ac9db NB |
4503 | /* |
4504 | * This will notify iscsi_target_transport.c: | |
4505 | * transport_cmd_check_stop() that a LUN shutdown is in | |
4506 | * progress for the iscsi_cmd_t. | |
4507 | */ | |
a1d8b49a | 4508 | spin_lock(&cmd->t_state_lock); |
6708bb27 | 4509 | pr_debug("SE_LUN[%d] - Setting cmd->transport" |
c66ac9db | 4510 | "_lun_stop for ITT: 0x%08x\n", |
e3d6f909 AG |
4511 | cmd->se_lun->unpacked_lun, |
4512 | cmd->se_tfo->get_task_tag(cmd)); | |
a1d8b49a AG |
4513 | atomic_set(&cmd->transport_lun_stop, 1); |
4514 | spin_unlock(&cmd->t_state_lock); | |
c66ac9db NB |
4515 | |
4516 | spin_unlock_irqrestore(&lun->lun_cmd_lock, lun_flags); | |
4517 | ||
6708bb27 AG |
4518 | if (!cmd->se_lun) { |
4519 | pr_err("ITT: 0x%08x, [i,t]_state: %u/%u\n", | |
e3d6f909 AG |
4520 | cmd->se_tfo->get_task_tag(cmd), |
4521 | cmd->se_tfo->get_cmd_state(cmd), cmd->t_state); | |
c66ac9db NB |
4522 | BUG(); |
4523 | } | |
4524 | /* | |
4525 | * If the Storage engine still owns the iscsi_cmd_t, determine | |
4526 | * and/or stop its context. | |
4527 | */ | |
6708bb27 | 4528 | pr_debug("SE_LUN[%d] - ITT: 0x%08x before transport" |
e3d6f909 AG |
4529 | "_lun_wait_for_tasks()\n", cmd->se_lun->unpacked_lun, |
4530 | cmd->se_tfo->get_task_tag(cmd)); | |
c66ac9db | 4531 | |
e3d6f909 | 4532 | if (transport_lun_wait_for_tasks(cmd, cmd->se_lun) < 0) { |
c66ac9db NB |
4533 | spin_lock_irqsave(&lun->lun_cmd_lock, lun_flags); |
4534 | continue; | |
4535 | } | |
4536 | ||
6708bb27 | 4537 | pr_debug("SE_LUN[%d] - ITT: 0x%08x after transport_lun" |
c66ac9db | 4538 | "_wait_for_tasks(): SUCCESS\n", |
e3d6f909 AG |
4539 | cmd->se_lun->unpacked_lun, |
4540 | cmd->se_tfo->get_task_tag(cmd)); | |
c66ac9db | 4541 | |
a1d8b49a | 4542 | spin_lock_irqsave(&cmd->t_state_lock, cmd_flags); |
6708bb27 | 4543 | if (!atomic_read(&cmd->transport_dev_active)) { |
a1d8b49a | 4544 | spin_unlock_irqrestore(&cmd->t_state_lock, cmd_flags); |
c66ac9db NB |
4545 | goto check_cond; |
4546 | } | |
a1d8b49a | 4547 | atomic_set(&cmd->transport_dev_active, 0); |
c66ac9db | 4548 | transport_all_task_dev_remove_state(cmd); |
a1d8b49a | 4549 | spin_unlock_irqrestore(&cmd->t_state_lock, cmd_flags); |
c66ac9db NB |
4550 | |
4551 | transport_free_dev_tasks(cmd); | |
4552 | /* | |
4553 | * The Storage engine stopped this struct se_cmd before it was | |
4554 | * send to the fabric frontend for delivery back to the | |
4555 | * Initiator Node. Return this SCSI CDB back with an | |
4556 | * CHECK_CONDITION status. | |
4557 | */ | |
4558 | check_cond: | |
4559 | transport_send_check_condition_and_sense(cmd, | |
4560 | TCM_NON_EXISTENT_LUN, 0); | |
4561 | /* | |
4562 | * If the fabric frontend is waiting for this iscsi_cmd_t to | |
4563 | * be released, notify the waiting thread now that LU has | |
4564 | * finished accessing it. | |
4565 | */ | |
a1d8b49a AG |
4566 | spin_lock_irqsave(&cmd->t_state_lock, cmd_flags); |
4567 | if (atomic_read(&cmd->transport_lun_fe_stop)) { | |
6708bb27 | 4568 | pr_debug("SE_LUN[%d] - Detected FE stop for" |
c66ac9db NB |
4569 | " struct se_cmd: %p ITT: 0x%08x\n", |
4570 | lun->unpacked_lun, | |
e3d6f909 | 4571 | cmd, cmd->se_tfo->get_task_tag(cmd)); |
c66ac9db | 4572 | |
a1d8b49a | 4573 | spin_unlock_irqrestore(&cmd->t_state_lock, |
c66ac9db NB |
4574 | cmd_flags); |
4575 | transport_cmd_check_stop(cmd, 1, 0); | |
a1d8b49a | 4576 | complete(&cmd->transport_lun_fe_stop_comp); |
c66ac9db NB |
4577 | spin_lock_irqsave(&lun->lun_cmd_lock, lun_flags); |
4578 | continue; | |
4579 | } | |
6708bb27 | 4580 | pr_debug("SE_LUN[%d] - ITT: 0x%08x finished processing\n", |
e3d6f909 | 4581 | lun->unpacked_lun, cmd->se_tfo->get_task_tag(cmd)); |
c66ac9db | 4582 | |
a1d8b49a | 4583 | spin_unlock_irqrestore(&cmd->t_state_lock, cmd_flags); |
c66ac9db NB |
4584 | spin_lock_irqsave(&lun->lun_cmd_lock, lun_flags); |
4585 | } | |
4586 | spin_unlock_irqrestore(&lun->lun_cmd_lock, lun_flags); | |
4587 | } | |
4588 | ||
4589 | static int transport_clear_lun_thread(void *p) | |
4590 | { | |
4591 | struct se_lun *lun = (struct se_lun *)p; | |
4592 | ||
4593 | __transport_clear_lun_from_sessions(lun); | |
4594 | complete(&lun->lun_shutdown_comp); | |
4595 | ||
4596 | return 0; | |
4597 | } | |
4598 | ||
4599 | int transport_clear_lun_from_sessions(struct se_lun *lun) | |
4600 | { | |
4601 | struct task_struct *kt; | |
4602 | ||
5951146d | 4603 | kt = kthread_run(transport_clear_lun_thread, lun, |
c66ac9db NB |
4604 | "tcm_cl_%u", lun->unpacked_lun); |
4605 | if (IS_ERR(kt)) { | |
6708bb27 | 4606 | pr_err("Unable to start clear_lun thread\n"); |
e3d6f909 | 4607 | return PTR_ERR(kt); |
c66ac9db NB |
4608 | } |
4609 | wait_for_completion(&lun->lun_shutdown_comp); | |
4610 | ||
4611 | return 0; | |
4612 | } | |
4613 | ||
4614 | /* transport_generic_wait_for_tasks(): | |
4615 | * | |
4616 | * Called from frontend or passthrough context to wait for storage engine | |
4617 | * to pause and/or release frontend generated struct se_cmd. | |
4618 | */ | |
4619 | static void transport_generic_wait_for_tasks( | |
4620 | struct se_cmd *cmd, | |
4621 | int remove_cmd, | |
4622 | int session_reinstatement) | |
4623 | { | |
4624 | unsigned long flags; | |
4625 | ||
4626 | if (!(cmd->se_cmd_flags & SCF_SE_LUN_CMD) && !(cmd->se_tmr_req)) | |
4627 | return; | |
4628 | ||
a1d8b49a | 4629 | spin_lock_irqsave(&cmd->t_state_lock, flags); |
c66ac9db NB |
4630 | /* |
4631 | * If we are already stopped due to an external event (ie: LUN shutdown) | |
4632 | * sleep until the connection can have the passed struct se_cmd back. | |
a1d8b49a | 4633 | * The cmd->transport_lun_stopped_sem will be upped by |
c66ac9db NB |
4634 | * transport_clear_lun_from_sessions() once the ConfigFS context caller |
4635 | * has completed its operation on the struct se_cmd. | |
4636 | */ | |
a1d8b49a | 4637 | if (atomic_read(&cmd->transport_lun_stop)) { |
c66ac9db | 4638 | |
6708bb27 | 4639 | pr_debug("wait_for_tasks: Stopping" |
e3d6f909 | 4640 | " wait_for_completion(&cmd->t_tasktransport_lun_fe" |
c66ac9db | 4641 | "_stop_comp); for ITT: 0x%08x\n", |
e3d6f909 | 4642 | cmd->se_tfo->get_task_tag(cmd)); |
c66ac9db NB |
4643 | /* |
4644 | * There is a special case for WRITES where a FE exception + | |
4645 | * LUN shutdown means ConfigFS context is still sleeping on | |
4646 | * transport_lun_stop_comp in transport_lun_wait_for_tasks(). | |
4647 | * We go ahead and up transport_lun_stop_comp just to be sure | |
4648 | * here. | |
4649 | */ | |
a1d8b49a AG |
4650 | spin_unlock_irqrestore(&cmd->t_state_lock, flags); |
4651 | complete(&cmd->transport_lun_stop_comp); | |
4652 | wait_for_completion(&cmd->transport_lun_fe_stop_comp); | |
4653 | spin_lock_irqsave(&cmd->t_state_lock, flags); | |
c66ac9db NB |
4654 | |
4655 | transport_all_task_dev_remove_state(cmd); | |
4656 | /* | |
4657 | * At this point, the frontend who was the originator of this | |
4658 | * struct se_cmd, now owns the structure and can be released through | |
4659 | * normal means below. | |
4660 | */ | |
6708bb27 | 4661 | pr_debug("wait_for_tasks: Stopped" |
e3d6f909 | 4662 | " wait_for_completion(&cmd->t_tasktransport_lun_fe_" |
c66ac9db | 4663 | "stop_comp); for ITT: 0x%08x\n", |
e3d6f909 | 4664 | cmd->se_tfo->get_task_tag(cmd)); |
c66ac9db | 4665 | |
a1d8b49a | 4666 | atomic_set(&cmd->transport_lun_stop, 0); |
c66ac9db | 4667 | } |
a1d8b49a AG |
4668 | if (!atomic_read(&cmd->t_transport_active) || |
4669 | atomic_read(&cmd->t_transport_aborted)) | |
c66ac9db NB |
4670 | goto remove; |
4671 | ||
a1d8b49a | 4672 | atomic_set(&cmd->t_transport_stop, 1); |
c66ac9db | 4673 | |
6708bb27 | 4674 | pr_debug("wait_for_tasks: Stopping %p ITT: 0x%08x" |
c66ac9db | 4675 | " i_state: %d, t_state/def_t_state: %d/%d, t_transport_stop" |
e3d6f909 AG |
4676 | " = TRUE\n", cmd, cmd->se_tfo->get_task_tag(cmd), |
4677 | cmd->se_tfo->get_cmd_state(cmd), cmd->t_state, | |
c66ac9db NB |
4678 | cmd->deferred_t_state); |
4679 | ||
a1d8b49a | 4680 | spin_unlock_irqrestore(&cmd->t_state_lock, flags); |
c66ac9db | 4681 | |
5951146d | 4682 | wake_up_interruptible(&cmd->se_dev->dev_queue_obj.thread_wq); |
c66ac9db | 4683 | |
a1d8b49a | 4684 | wait_for_completion(&cmd->t_transport_stop_comp); |
c66ac9db | 4685 | |
a1d8b49a AG |
4686 | spin_lock_irqsave(&cmd->t_state_lock, flags); |
4687 | atomic_set(&cmd->t_transport_active, 0); | |
4688 | atomic_set(&cmd->t_transport_stop, 0); | |
c66ac9db | 4689 | |
6708bb27 | 4690 | pr_debug("wait_for_tasks: Stopped wait_for_compltion(" |
a1d8b49a | 4691 | "&cmd->t_transport_stop_comp) for ITT: 0x%08x\n", |
e3d6f909 | 4692 | cmd->se_tfo->get_task_tag(cmd)); |
c66ac9db | 4693 | remove: |
a1d8b49a | 4694 | spin_unlock_irqrestore(&cmd->t_state_lock, flags); |
c66ac9db NB |
4695 | if (!remove_cmd) |
4696 | return; | |
4697 | ||
35462975 | 4698 | transport_generic_free_cmd(cmd, 0, session_reinstatement); |
c66ac9db NB |
4699 | } |
4700 | ||
4701 | static int transport_get_sense_codes( | |
4702 | struct se_cmd *cmd, | |
4703 | u8 *asc, | |
4704 | u8 *ascq) | |
4705 | { | |
4706 | *asc = cmd->scsi_asc; | |
4707 | *ascq = cmd->scsi_ascq; | |
4708 | ||
4709 | return 0; | |
4710 | } | |
4711 | ||
4712 | static int transport_set_sense_codes( | |
4713 | struct se_cmd *cmd, | |
4714 | u8 asc, | |
4715 | u8 ascq) | |
4716 | { | |
4717 | cmd->scsi_asc = asc; | |
4718 | cmd->scsi_ascq = ascq; | |
4719 | ||
4720 | return 0; | |
4721 | } | |
4722 | ||
4723 | int transport_send_check_condition_and_sense( | |
4724 | struct se_cmd *cmd, | |
4725 | u8 reason, | |
4726 | int from_transport) | |
4727 | { | |
4728 | unsigned char *buffer = cmd->sense_buffer; | |
4729 | unsigned long flags; | |
4730 | int offset; | |
4731 | u8 asc = 0, ascq = 0; | |
4732 | ||
a1d8b49a | 4733 | spin_lock_irqsave(&cmd->t_state_lock, flags); |
c66ac9db | 4734 | if (cmd->se_cmd_flags & SCF_SENT_CHECK_CONDITION) { |
a1d8b49a | 4735 | spin_unlock_irqrestore(&cmd->t_state_lock, flags); |
c66ac9db NB |
4736 | return 0; |
4737 | } | |
4738 | cmd->se_cmd_flags |= SCF_SENT_CHECK_CONDITION; | |
a1d8b49a | 4739 | spin_unlock_irqrestore(&cmd->t_state_lock, flags); |
c66ac9db NB |
4740 | |
4741 | if (!reason && from_transport) | |
4742 | goto after_reason; | |
4743 | ||
4744 | if (!from_transport) | |
4745 | cmd->se_cmd_flags |= SCF_EMULATED_TASK_SENSE; | |
4746 | /* | |
4747 | * Data Segment and SenseLength of the fabric response PDU. | |
4748 | * | |
4749 | * TRANSPORT_SENSE_BUFFER is now set to SCSI_SENSE_BUFFERSIZE | |
4750 | * from include/scsi/scsi_cmnd.h | |
4751 | */ | |
e3d6f909 | 4752 | offset = cmd->se_tfo->set_fabric_sense_len(cmd, |
c66ac9db NB |
4753 | TRANSPORT_SENSE_BUFFER); |
4754 | /* | |
4755 | * Actual SENSE DATA, see SPC-3 7.23.2 SPC_SENSE_KEY_OFFSET uses | |
4756 | * SENSE KEY values from include/scsi/scsi.h | |
4757 | */ | |
4758 | switch (reason) { | |
4759 | case TCM_NON_EXISTENT_LUN: | |
eb39d340 NB |
4760 | /* CURRENT ERROR */ |
4761 | buffer[offset] = 0x70; | |
4762 | /* ILLEGAL REQUEST */ | |
4763 | buffer[offset+SPC_SENSE_KEY_OFFSET] = ILLEGAL_REQUEST; | |
4764 | /* LOGICAL UNIT NOT SUPPORTED */ | |
4765 | buffer[offset+SPC_ASC_KEY_OFFSET] = 0x25; | |
4766 | break; | |
c66ac9db NB |
4767 | case TCM_UNSUPPORTED_SCSI_OPCODE: |
4768 | case TCM_SECTOR_COUNT_TOO_MANY: | |
4769 | /* CURRENT ERROR */ | |
4770 | buffer[offset] = 0x70; | |
4771 | /* ILLEGAL REQUEST */ | |
4772 | buffer[offset+SPC_SENSE_KEY_OFFSET] = ILLEGAL_REQUEST; | |
4773 | /* INVALID COMMAND OPERATION CODE */ | |
4774 | buffer[offset+SPC_ASC_KEY_OFFSET] = 0x20; | |
4775 | break; | |
4776 | case TCM_UNKNOWN_MODE_PAGE: | |
4777 | /* CURRENT ERROR */ | |
4778 | buffer[offset] = 0x70; | |
4779 | /* ILLEGAL REQUEST */ | |
4780 | buffer[offset+SPC_SENSE_KEY_OFFSET] = ILLEGAL_REQUEST; | |
4781 | /* INVALID FIELD IN CDB */ | |
4782 | buffer[offset+SPC_ASC_KEY_OFFSET] = 0x24; | |
4783 | break; | |
4784 | case TCM_CHECK_CONDITION_ABORT_CMD: | |
4785 | /* CURRENT ERROR */ | |
4786 | buffer[offset] = 0x70; | |
4787 | /* ABORTED COMMAND */ | |
4788 | buffer[offset+SPC_SENSE_KEY_OFFSET] = ABORTED_COMMAND; | |
4789 | /* BUS DEVICE RESET FUNCTION OCCURRED */ | |
4790 | buffer[offset+SPC_ASC_KEY_OFFSET] = 0x29; | |
4791 | buffer[offset+SPC_ASCQ_KEY_OFFSET] = 0x03; | |
4792 | break; | |
4793 | case TCM_INCORRECT_AMOUNT_OF_DATA: | |
4794 | /* CURRENT ERROR */ | |
4795 | buffer[offset] = 0x70; | |
4796 | /* ABORTED COMMAND */ | |
4797 | buffer[offset+SPC_SENSE_KEY_OFFSET] = ABORTED_COMMAND; | |
4798 | /* WRITE ERROR */ | |
4799 | buffer[offset+SPC_ASC_KEY_OFFSET] = 0x0c; | |
4800 | /* NOT ENOUGH UNSOLICITED DATA */ | |
4801 | buffer[offset+SPC_ASCQ_KEY_OFFSET] = 0x0d; | |
4802 | break; | |
4803 | case TCM_INVALID_CDB_FIELD: | |
4804 | /* CURRENT ERROR */ | |
4805 | buffer[offset] = 0x70; | |
4806 | /* ABORTED COMMAND */ | |
4807 | buffer[offset+SPC_SENSE_KEY_OFFSET] = ABORTED_COMMAND; | |
4808 | /* INVALID FIELD IN CDB */ | |
4809 | buffer[offset+SPC_ASC_KEY_OFFSET] = 0x24; | |
4810 | break; | |
4811 | case TCM_INVALID_PARAMETER_LIST: | |
4812 | /* CURRENT ERROR */ | |
4813 | buffer[offset] = 0x70; | |
4814 | /* ABORTED COMMAND */ | |
4815 | buffer[offset+SPC_SENSE_KEY_OFFSET] = ABORTED_COMMAND; | |
4816 | /* INVALID FIELD IN PARAMETER LIST */ | |
4817 | buffer[offset+SPC_ASC_KEY_OFFSET] = 0x26; | |
4818 | break; | |
4819 | case TCM_UNEXPECTED_UNSOLICITED_DATA: | |
4820 | /* CURRENT ERROR */ | |
4821 | buffer[offset] = 0x70; | |
4822 | /* ABORTED COMMAND */ | |
4823 | buffer[offset+SPC_SENSE_KEY_OFFSET] = ABORTED_COMMAND; | |
4824 | /* WRITE ERROR */ | |
4825 | buffer[offset+SPC_ASC_KEY_OFFSET] = 0x0c; | |
4826 | /* UNEXPECTED_UNSOLICITED_DATA */ | |
4827 | buffer[offset+SPC_ASCQ_KEY_OFFSET] = 0x0c; | |
4828 | break; | |
4829 | case TCM_SERVICE_CRC_ERROR: | |
4830 | /* CURRENT ERROR */ | |
4831 | buffer[offset] = 0x70; | |
4832 | /* ABORTED COMMAND */ | |
4833 | buffer[offset+SPC_SENSE_KEY_OFFSET] = ABORTED_COMMAND; | |
4834 | /* PROTOCOL SERVICE CRC ERROR */ | |
4835 | buffer[offset+SPC_ASC_KEY_OFFSET] = 0x47; | |
4836 | /* N/A */ | |
4837 | buffer[offset+SPC_ASCQ_KEY_OFFSET] = 0x05; | |
4838 | break; | |
4839 | case TCM_SNACK_REJECTED: | |
4840 | /* CURRENT ERROR */ | |
4841 | buffer[offset] = 0x70; | |
4842 | /* ABORTED COMMAND */ | |
4843 | buffer[offset+SPC_SENSE_KEY_OFFSET] = ABORTED_COMMAND; | |
4844 | /* READ ERROR */ | |
4845 | buffer[offset+SPC_ASC_KEY_OFFSET] = 0x11; | |
4846 | /* FAILED RETRANSMISSION REQUEST */ | |
4847 | buffer[offset+SPC_ASCQ_KEY_OFFSET] = 0x13; | |
4848 | break; | |
4849 | case TCM_WRITE_PROTECTED: | |
4850 | /* CURRENT ERROR */ | |
4851 | buffer[offset] = 0x70; | |
4852 | /* DATA PROTECT */ | |
4853 | buffer[offset+SPC_SENSE_KEY_OFFSET] = DATA_PROTECT; | |
4854 | /* WRITE PROTECTED */ | |
4855 | buffer[offset+SPC_ASC_KEY_OFFSET] = 0x27; | |
4856 | break; | |
4857 | case TCM_CHECK_CONDITION_UNIT_ATTENTION: | |
4858 | /* CURRENT ERROR */ | |
4859 | buffer[offset] = 0x70; | |
4860 | /* UNIT ATTENTION */ | |
4861 | buffer[offset+SPC_SENSE_KEY_OFFSET] = UNIT_ATTENTION; | |
4862 | core_scsi3_ua_for_check_condition(cmd, &asc, &ascq); | |
4863 | buffer[offset+SPC_ASC_KEY_OFFSET] = asc; | |
4864 | buffer[offset+SPC_ASCQ_KEY_OFFSET] = ascq; | |
4865 | break; | |
4866 | case TCM_CHECK_CONDITION_NOT_READY: | |
4867 | /* CURRENT ERROR */ | |
4868 | buffer[offset] = 0x70; | |
4869 | /* Not Ready */ | |
4870 | buffer[offset+SPC_SENSE_KEY_OFFSET] = NOT_READY; | |
4871 | transport_get_sense_codes(cmd, &asc, &ascq); | |
4872 | buffer[offset+SPC_ASC_KEY_OFFSET] = asc; | |
4873 | buffer[offset+SPC_ASCQ_KEY_OFFSET] = ascq; | |
4874 | break; | |
4875 | case TCM_LOGICAL_UNIT_COMMUNICATION_FAILURE: | |
4876 | default: | |
4877 | /* CURRENT ERROR */ | |
4878 | buffer[offset] = 0x70; | |
4879 | /* ILLEGAL REQUEST */ | |
4880 | buffer[offset+SPC_SENSE_KEY_OFFSET] = ILLEGAL_REQUEST; | |
4881 | /* LOGICAL UNIT COMMUNICATION FAILURE */ | |
4882 | buffer[offset+SPC_ASC_KEY_OFFSET] = 0x80; | |
4883 | break; | |
4884 | } | |
4885 | /* | |
4886 | * This code uses linux/include/scsi/scsi.h SAM status codes! | |
4887 | */ | |
4888 | cmd->scsi_status = SAM_STAT_CHECK_CONDITION; | |
4889 | /* | |
4890 | * Automatically padded, this value is encoded in the fabric's | |
4891 | * data_length response PDU containing the SCSI defined sense data. | |
4892 | */ | |
4893 | cmd->scsi_sense_length = TRANSPORT_SENSE_BUFFER + offset; | |
4894 | ||
4895 | after_reason: | |
07bde79a | 4896 | return cmd->se_tfo->queue_status(cmd); |
c66ac9db NB |
4897 | } |
4898 | EXPORT_SYMBOL(transport_send_check_condition_and_sense); | |
4899 | ||
4900 | int transport_check_aborted_status(struct se_cmd *cmd, int send_status) | |
4901 | { | |
4902 | int ret = 0; | |
4903 | ||
a1d8b49a | 4904 | if (atomic_read(&cmd->t_transport_aborted) != 0) { |
6708bb27 | 4905 | if (!send_status || |
c66ac9db NB |
4906 | (cmd->se_cmd_flags & SCF_SENT_DELAYED_TAS)) |
4907 | return 1; | |
4908 | #if 0 | |
6708bb27 | 4909 | pr_debug("Sending delayed SAM_STAT_TASK_ABORTED" |
c66ac9db | 4910 | " status for CDB: 0x%02x ITT: 0x%08x\n", |
a1d8b49a | 4911 | cmd->t_task_cdb[0], |
e3d6f909 | 4912 | cmd->se_tfo->get_task_tag(cmd)); |
c66ac9db NB |
4913 | #endif |
4914 | cmd->se_cmd_flags |= SCF_SENT_DELAYED_TAS; | |
e3d6f909 | 4915 | cmd->se_tfo->queue_status(cmd); |
c66ac9db NB |
4916 | ret = 1; |
4917 | } | |
4918 | return ret; | |
4919 | } | |
4920 | EXPORT_SYMBOL(transport_check_aborted_status); | |
4921 | ||
4922 | void transport_send_task_abort(struct se_cmd *cmd) | |
4923 | { | |
4924 | /* | |
4925 | * If there are still expected incoming fabric WRITEs, we wait | |
4926 | * until until they have completed before sending a TASK_ABORTED | |
4927 | * response. This response with TASK_ABORTED status will be | |
4928 | * queued back to fabric module by transport_check_aborted_status(). | |
4929 | */ | |
4930 | if (cmd->data_direction == DMA_TO_DEVICE) { | |
e3d6f909 | 4931 | if (cmd->se_tfo->write_pending_status(cmd) != 0) { |
a1d8b49a | 4932 | atomic_inc(&cmd->t_transport_aborted); |
c66ac9db NB |
4933 | smp_mb__after_atomic_inc(); |
4934 | cmd->scsi_status = SAM_STAT_TASK_ABORTED; | |
4935 | transport_new_cmd_failure(cmd); | |
4936 | return; | |
4937 | } | |
4938 | } | |
4939 | cmd->scsi_status = SAM_STAT_TASK_ABORTED; | |
4940 | #if 0 | |
6708bb27 | 4941 | pr_debug("Setting SAM_STAT_TASK_ABORTED status for CDB: 0x%02x," |
a1d8b49a | 4942 | " ITT: 0x%08x\n", cmd->t_task_cdb[0], |
e3d6f909 | 4943 | cmd->se_tfo->get_task_tag(cmd)); |
c66ac9db | 4944 | #endif |
e3d6f909 | 4945 | cmd->se_tfo->queue_status(cmd); |
c66ac9db NB |
4946 | } |
4947 | ||
4948 | /* transport_generic_do_tmr(): | |
4949 | * | |
4950 | * | |
4951 | */ | |
4952 | int transport_generic_do_tmr(struct se_cmd *cmd) | |
4953 | { | |
5951146d | 4954 | struct se_device *dev = cmd->se_dev; |
c66ac9db NB |
4955 | struct se_tmr_req *tmr = cmd->se_tmr_req; |
4956 | int ret; | |
4957 | ||
4958 | switch (tmr->function) { | |
5c6cd613 | 4959 | case TMR_ABORT_TASK: |
c66ac9db NB |
4960 | tmr->response = TMR_FUNCTION_REJECTED; |
4961 | break; | |
5c6cd613 NB |
4962 | case TMR_ABORT_TASK_SET: |
4963 | case TMR_CLEAR_ACA: | |
4964 | case TMR_CLEAR_TASK_SET: | |
c66ac9db NB |
4965 | tmr->response = TMR_TASK_MGMT_FUNCTION_NOT_SUPPORTED; |
4966 | break; | |
5c6cd613 | 4967 | case TMR_LUN_RESET: |
c66ac9db NB |
4968 | ret = core_tmr_lun_reset(dev, tmr, NULL, NULL); |
4969 | tmr->response = (!ret) ? TMR_FUNCTION_COMPLETE : | |
4970 | TMR_FUNCTION_REJECTED; | |
4971 | break; | |
5c6cd613 | 4972 | case TMR_TARGET_WARM_RESET: |
c66ac9db NB |
4973 | tmr->response = TMR_FUNCTION_REJECTED; |
4974 | break; | |
5c6cd613 | 4975 | case TMR_TARGET_COLD_RESET: |
c66ac9db NB |
4976 | tmr->response = TMR_FUNCTION_REJECTED; |
4977 | break; | |
c66ac9db | 4978 | default: |
6708bb27 | 4979 | pr_err("Uknown TMR function: 0x%02x.\n", |
c66ac9db NB |
4980 | tmr->function); |
4981 | tmr->response = TMR_FUNCTION_REJECTED; | |
4982 | break; | |
4983 | } | |
4984 | ||
4985 | cmd->t_state = TRANSPORT_ISTATE_PROCESSING; | |
e3d6f909 | 4986 | cmd->se_tfo->queue_tm_rsp(cmd); |
c66ac9db NB |
4987 | |
4988 | transport_cmd_check_stop(cmd, 2, 0); | |
4989 | return 0; | |
4990 | } | |
4991 | ||
4992 | /* | |
4993 | * Called with spin_lock_irq(&dev->execute_task_lock); held | |
4994 | * | |
4995 | */ | |
4996 | static struct se_task * | |
4997 | transport_get_task_from_state_list(struct se_device *dev) | |
4998 | { | |
4999 | struct se_task *task; | |
5000 | ||
5001 | if (list_empty(&dev->state_task_list)) | |
5002 | return NULL; | |
5003 | ||
5004 | list_for_each_entry(task, &dev->state_task_list, t_state_list) | |
5005 | break; | |
5006 | ||
5007 | list_del(&task->t_state_list); | |
5008 | atomic_set(&task->task_state_active, 0); | |
5009 | ||
5010 | return task; | |
5011 | } | |
5012 | ||
5013 | static void transport_processing_shutdown(struct se_device *dev) | |
5014 | { | |
5015 | struct se_cmd *cmd; | |
c66ac9db | 5016 | struct se_task *task; |
c66ac9db NB |
5017 | unsigned long flags; |
5018 | /* | |
5019 | * Empty the struct se_device's struct se_task state list. | |
5020 | */ | |
5021 | spin_lock_irqsave(&dev->execute_task_lock, flags); | |
5022 | while ((task = transport_get_task_from_state_list(dev))) { | |
e3d6f909 | 5023 | if (!task->task_se_cmd) { |
6708bb27 | 5024 | pr_err("task->task_se_cmd is NULL!\n"); |
c66ac9db NB |
5025 | continue; |
5026 | } | |
e3d6f909 | 5027 | cmd = task->task_se_cmd; |
c66ac9db | 5028 | |
c66ac9db NB |
5029 | spin_unlock_irqrestore(&dev->execute_task_lock, flags); |
5030 | ||
a1d8b49a | 5031 | spin_lock_irqsave(&cmd->t_state_lock, flags); |
c66ac9db | 5032 | |
6708bb27 AG |
5033 | pr_debug("PT: cmd: %p task: %p ITT: 0x%08x," |
5034 | " i_state: %d, t_state/def_t_state:" | |
c66ac9db | 5035 | " %d/%d cdb: 0x%02x\n", cmd, task, |
6708bb27 AG |
5036 | cmd->se_tfo->get_task_tag(cmd), |
5037 | cmd->se_tfo->get_cmd_state(cmd), | |
c66ac9db | 5038 | cmd->t_state, cmd->deferred_t_state, |
a1d8b49a | 5039 | cmd->t_task_cdb[0]); |
6708bb27 | 5040 | pr_debug("PT: ITT[0x%08x] - t_tasks: %d t_task_cdbs_left:" |
c66ac9db NB |
5041 | " %d t_task_cdbs_sent: %d -- t_transport_active: %d" |
5042 | " t_transport_stop: %d t_transport_sent: %d\n", | |
e3d6f909 | 5043 | cmd->se_tfo->get_task_tag(cmd), |
6708bb27 | 5044 | cmd->t_task_list_num, |
a1d8b49a AG |
5045 | atomic_read(&cmd->t_task_cdbs_left), |
5046 | atomic_read(&cmd->t_task_cdbs_sent), | |
5047 | atomic_read(&cmd->t_transport_active), | |
5048 | atomic_read(&cmd->t_transport_stop), | |
5049 | atomic_read(&cmd->t_transport_sent)); | |
c66ac9db NB |
5050 | |
5051 | if (atomic_read(&task->task_active)) { | |
5052 | atomic_set(&task->task_stop, 1); | |
5053 | spin_unlock_irqrestore( | |
a1d8b49a | 5054 | &cmd->t_state_lock, flags); |
c66ac9db | 5055 | |
6708bb27 | 5056 | pr_debug("Waiting for task: %p to shutdown for dev:" |
c66ac9db NB |
5057 | " %p\n", task, dev); |
5058 | wait_for_completion(&task->task_stop_comp); | |
6708bb27 | 5059 | pr_debug("Completed task: %p shutdown for dev: %p\n", |
c66ac9db NB |
5060 | task, dev); |
5061 | ||
a1d8b49a AG |
5062 | spin_lock_irqsave(&cmd->t_state_lock, flags); |
5063 | atomic_dec(&cmd->t_task_cdbs_left); | |
c66ac9db NB |
5064 | |
5065 | atomic_set(&task->task_active, 0); | |
5066 | atomic_set(&task->task_stop, 0); | |
52208ae3 NB |
5067 | } else { |
5068 | if (atomic_read(&task->task_execute_queue) != 0) | |
5069 | transport_remove_task_from_execute_queue(task, dev); | |
c66ac9db NB |
5070 | } |
5071 | __transport_stop_task_timer(task, &flags); | |
5072 | ||
6708bb27 | 5073 | if (!atomic_dec_and_test(&cmd->t_task_cdbs_ex_left)) { |
c66ac9db | 5074 | spin_unlock_irqrestore( |
a1d8b49a | 5075 | &cmd->t_state_lock, flags); |
c66ac9db | 5076 | |
6708bb27 | 5077 | pr_debug("Skipping task: %p, dev: %p for" |
c66ac9db | 5078 | " t_task_cdbs_ex_left: %d\n", task, dev, |
a1d8b49a | 5079 | atomic_read(&cmd->t_task_cdbs_ex_left)); |
c66ac9db NB |
5080 | |
5081 | spin_lock_irqsave(&dev->execute_task_lock, flags); | |
5082 | continue; | |
5083 | } | |
5084 | ||
a1d8b49a | 5085 | if (atomic_read(&cmd->t_transport_active)) { |
6708bb27 | 5086 | pr_debug("got t_transport_active = 1 for task: %p, dev:" |
c66ac9db NB |
5087 | " %p\n", task, dev); |
5088 | ||
a1d8b49a | 5089 | if (atomic_read(&cmd->t_fe_count)) { |
c66ac9db | 5090 | spin_unlock_irqrestore( |
a1d8b49a | 5091 | &cmd->t_state_lock, flags); |
c66ac9db NB |
5092 | transport_send_check_condition_and_sense( |
5093 | cmd, TCM_LOGICAL_UNIT_COMMUNICATION_FAILURE, | |
5094 | 0); | |
5095 | transport_remove_cmd_from_queue(cmd, | |
5951146d | 5096 | &cmd->se_dev->dev_queue_obj); |
c66ac9db NB |
5097 | |
5098 | transport_lun_remove_cmd(cmd); | |
5099 | transport_cmd_check_stop(cmd, 1, 0); | |
5100 | } else { | |
5101 | spin_unlock_irqrestore( | |
a1d8b49a | 5102 | &cmd->t_state_lock, flags); |
c66ac9db NB |
5103 | |
5104 | transport_remove_cmd_from_queue(cmd, | |
5951146d | 5105 | &cmd->se_dev->dev_queue_obj); |
c66ac9db NB |
5106 | |
5107 | transport_lun_remove_cmd(cmd); | |
5108 | ||
5109 | if (transport_cmd_check_stop(cmd, 1, 0)) | |
35462975 | 5110 | transport_generic_remove(cmd, 0); |
c66ac9db NB |
5111 | } |
5112 | ||
5113 | spin_lock_irqsave(&dev->execute_task_lock, flags); | |
5114 | continue; | |
5115 | } | |
6708bb27 | 5116 | pr_debug("Got t_transport_active = 0 for task: %p, dev: %p\n", |
c66ac9db NB |
5117 | task, dev); |
5118 | ||
a1d8b49a | 5119 | if (atomic_read(&cmd->t_fe_count)) { |
c66ac9db | 5120 | spin_unlock_irqrestore( |
a1d8b49a | 5121 | &cmd->t_state_lock, flags); |
c66ac9db NB |
5122 | transport_send_check_condition_and_sense(cmd, |
5123 | TCM_LOGICAL_UNIT_COMMUNICATION_FAILURE, 0); | |
5124 | transport_remove_cmd_from_queue(cmd, | |
5951146d | 5125 | &cmd->se_dev->dev_queue_obj); |
c66ac9db NB |
5126 | |
5127 | transport_lun_remove_cmd(cmd); | |
5128 | transport_cmd_check_stop(cmd, 1, 0); | |
5129 | } else { | |
5130 | spin_unlock_irqrestore( | |
a1d8b49a | 5131 | &cmd->t_state_lock, flags); |
c66ac9db NB |
5132 | |
5133 | transport_remove_cmd_from_queue(cmd, | |
5951146d | 5134 | &cmd->se_dev->dev_queue_obj); |
c66ac9db NB |
5135 | transport_lun_remove_cmd(cmd); |
5136 | ||
5137 | if (transport_cmd_check_stop(cmd, 1, 0)) | |
35462975 | 5138 | transport_generic_remove(cmd, 0); |
c66ac9db NB |
5139 | } |
5140 | ||
5141 | spin_lock_irqsave(&dev->execute_task_lock, flags); | |
5142 | } | |
5143 | spin_unlock_irqrestore(&dev->execute_task_lock, flags); | |
5144 | /* | |
5145 | * Empty the struct se_device's struct se_cmd list. | |
5146 | */ | |
5951146d | 5147 | while ((cmd = transport_get_cmd_from_queue(&dev->dev_queue_obj))) { |
c66ac9db | 5148 | |
6708bb27 | 5149 | pr_debug("From Device Queue: cmd: %p t_state: %d\n", |
5951146d | 5150 | cmd, cmd->t_state); |
c66ac9db | 5151 | |
a1d8b49a | 5152 | if (atomic_read(&cmd->t_fe_count)) { |
c66ac9db NB |
5153 | transport_send_check_condition_and_sense(cmd, |
5154 | TCM_LOGICAL_UNIT_COMMUNICATION_FAILURE, 0); | |
5155 | ||
5156 | transport_lun_remove_cmd(cmd); | |
5157 | transport_cmd_check_stop(cmd, 1, 0); | |
5158 | } else { | |
5159 | transport_lun_remove_cmd(cmd); | |
5160 | if (transport_cmd_check_stop(cmd, 1, 0)) | |
35462975 | 5161 | transport_generic_remove(cmd, 0); |
c66ac9db | 5162 | } |
c66ac9db | 5163 | } |
c66ac9db NB |
5164 | } |
5165 | ||
5166 | /* transport_processing_thread(): | |
5167 | * | |
5168 | * | |
5169 | */ | |
5170 | static int transport_processing_thread(void *param) | |
5171 | { | |
5951146d | 5172 | int ret; |
c66ac9db NB |
5173 | struct se_cmd *cmd; |
5174 | struct se_device *dev = (struct se_device *) param; | |
c66ac9db NB |
5175 | |
5176 | set_user_nice(current, -20); | |
5177 | ||
5178 | while (!kthread_should_stop()) { | |
e3d6f909 AG |
5179 | ret = wait_event_interruptible(dev->dev_queue_obj.thread_wq, |
5180 | atomic_read(&dev->dev_queue_obj.queue_cnt) || | |
c66ac9db NB |
5181 | kthread_should_stop()); |
5182 | if (ret < 0) | |
5183 | goto out; | |
5184 | ||
5185 | spin_lock_irq(&dev->dev_status_lock); | |
5186 | if (dev->dev_status & TRANSPORT_DEVICE_SHUTDOWN) { | |
5187 | spin_unlock_irq(&dev->dev_status_lock); | |
5188 | transport_processing_shutdown(dev); | |
5189 | continue; | |
5190 | } | |
5191 | spin_unlock_irq(&dev->dev_status_lock); | |
5192 | ||
5193 | get_cmd: | |
5194 | __transport_execute_tasks(dev); | |
5195 | ||
5951146d AG |
5196 | cmd = transport_get_cmd_from_queue(&dev->dev_queue_obj); |
5197 | if (!cmd) | |
c66ac9db NB |
5198 | continue; |
5199 | ||
5951146d | 5200 | switch (cmd->t_state) { |
c66ac9db | 5201 | case TRANSPORT_NEW_CMD_MAP: |
6708bb27 AG |
5202 | if (!cmd->se_tfo->new_cmd_map) { |
5203 | pr_err("cmd->se_tfo->new_cmd_map is" | |
c66ac9db NB |
5204 | " NULL for TRANSPORT_NEW_CMD_MAP\n"); |
5205 | BUG(); | |
5206 | } | |
e3d6f909 | 5207 | ret = cmd->se_tfo->new_cmd_map(cmd); |
c66ac9db NB |
5208 | if (ret < 0) { |
5209 | cmd->transport_error_status = ret; | |
5210 | transport_generic_request_failure(cmd, NULL, | |
5211 | 0, (cmd->data_direction != | |
5212 | DMA_TO_DEVICE)); | |
5213 | break; | |
5214 | } | |
5215 | /* Fall through */ | |
5216 | case TRANSPORT_NEW_CMD: | |
5217 | ret = transport_generic_new_cmd(cmd); | |
07bde79a NB |
5218 | if (ret == -EAGAIN) |
5219 | break; | |
5220 | else if (ret < 0) { | |
c66ac9db NB |
5221 | cmd->transport_error_status = ret; |
5222 | transport_generic_request_failure(cmd, NULL, | |
5223 | 0, (cmd->data_direction != | |
5224 | DMA_TO_DEVICE)); | |
5225 | } | |
5226 | break; | |
5227 | case TRANSPORT_PROCESS_WRITE: | |
5228 | transport_generic_process_write(cmd); | |
5229 | break; | |
5230 | case TRANSPORT_COMPLETE_OK: | |
5231 | transport_stop_all_task_timers(cmd); | |
5232 | transport_generic_complete_ok(cmd); | |
5233 | break; | |
5234 | case TRANSPORT_REMOVE: | |
35462975 | 5235 | transport_generic_remove(cmd, 0); |
c66ac9db | 5236 | break; |
f4366772 | 5237 | case TRANSPORT_FREE_CMD_INTR: |
35462975 | 5238 | transport_generic_free_cmd(cmd, 0, 0); |
f4366772 | 5239 | break; |
c66ac9db NB |
5240 | case TRANSPORT_PROCESS_TMR: |
5241 | transport_generic_do_tmr(cmd); | |
5242 | break; | |
5243 | case TRANSPORT_COMPLETE_FAILURE: | |
5244 | transport_generic_request_failure(cmd, NULL, 1, 1); | |
5245 | break; | |
5246 | case TRANSPORT_COMPLETE_TIMEOUT: | |
5247 | transport_stop_all_task_timers(cmd); | |
5248 | transport_generic_request_timeout(cmd); | |
5249 | break; | |
07bde79a NB |
5250 | case TRANSPORT_COMPLETE_QF_WP: |
5251 | transport_generic_write_pending(cmd); | |
5252 | break; | |
c66ac9db | 5253 | default: |
6708bb27 | 5254 | pr_err("Unknown t_state: %d deferred_t_state:" |
c66ac9db | 5255 | " %d for ITT: 0x%08x i_state: %d on SE LUN:" |
5951146d | 5256 | " %u\n", cmd->t_state, cmd->deferred_t_state, |
e3d6f909 AG |
5257 | cmd->se_tfo->get_task_tag(cmd), |
5258 | cmd->se_tfo->get_cmd_state(cmd), | |
5259 | cmd->se_lun->unpacked_lun); | |
c66ac9db NB |
5260 | BUG(); |
5261 | } | |
5262 | ||
5263 | goto get_cmd; | |
5264 | } | |
5265 | ||
5266 | out: | |
5267 | transport_release_all_cmds(dev); | |
5268 | dev->process_thread = NULL; | |
5269 | return 0; | |
5270 | } |