Commit | Line | Data |
---|---|---|
c66ac9db NB |
1 | /******************************************************************************* |
2 | * Filename: target_core_transport.c | |
3 | * | |
4 | * This file contains the Generic Target Engine Core. | |
5 | * | |
6 | * Copyright (c) 2002, 2003, 2004, 2005 PyX Technologies, Inc. | |
7 | * Copyright (c) 2005, 2006, 2007 SBE, Inc. | |
8 | * Copyright (c) 2007-2010 Rising Tide Systems | |
9 | * Copyright (c) 2008-2010 Linux-iSCSI.org | |
10 | * | |
11 | * Nicholas A. Bellinger <nab@kernel.org> | |
12 | * | |
13 | * This program is free software; you can redistribute it and/or modify | |
14 | * it under the terms of the GNU General Public License as published by | |
15 | * the Free Software Foundation; either version 2 of the License, or | |
16 | * (at your option) any later version. | |
17 | * | |
18 | * This program is distributed in the hope that it will be useful, | |
19 | * but WITHOUT ANY WARRANTY; without even the implied warranty of | |
20 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
21 | * GNU General Public License for more details. | |
22 | * | |
23 | * You should have received a copy of the GNU General Public License | |
24 | * along with this program; if not, write to the Free Software | |
25 | * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. | |
26 | * | |
27 | ******************************************************************************/ | |
28 | ||
c66ac9db NB |
29 | #include <linux/net.h> |
30 | #include <linux/delay.h> | |
31 | #include <linux/string.h> | |
32 | #include <linux/timer.h> | |
33 | #include <linux/slab.h> | |
34 | #include <linux/blkdev.h> | |
35 | #include <linux/spinlock.h> | |
c66ac9db NB |
36 | #include <linux/kthread.h> |
37 | #include <linux/in.h> | |
38 | #include <linux/cdrom.h> | |
39 | #include <asm/unaligned.h> | |
40 | #include <net/sock.h> | |
41 | #include <net/tcp.h> | |
42 | #include <scsi/scsi.h> | |
43 | #include <scsi/scsi_cmnd.h> | |
e66ecd50 | 44 | #include <scsi/scsi_tcq.h> |
c66ac9db NB |
45 | |
46 | #include <target/target_core_base.h> | |
47 | #include <target/target_core_device.h> | |
48 | #include <target/target_core_tmr.h> | |
49 | #include <target/target_core_tpg.h> | |
50 | #include <target/target_core_transport.h> | |
51 | #include <target/target_core_fabric_ops.h> | |
52 | #include <target/target_core_configfs.h> | |
53 | ||
54 | #include "target_core_alua.h" | |
55 | #include "target_core_hba.h" | |
56 | #include "target_core_pr.h" | |
57 | #include "target_core_scdb.h" | |
58 | #include "target_core_ua.h" | |
59 | ||
e3d6f909 | 60 | static int sub_api_initialized; |
c66ac9db NB |
61 | |
62 | static struct kmem_cache *se_cmd_cache; | |
63 | static struct kmem_cache *se_sess_cache; | |
64 | struct kmem_cache *se_tmr_req_cache; | |
65 | struct kmem_cache *se_ua_cache; | |
c66ac9db NB |
66 | struct kmem_cache *t10_pr_reg_cache; |
67 | struct kmem_cache *t10_alua_lu_gp_cache; | |
68 | struct kmem_cache *t10_alua_lu_gp_mem_cache; | |
69 | struct kmem_cache *t10_alua_tg_pt_gp_cache; | |
70 | struct kmem_cache *t10_alua_tg_pt_gp_mem_cache; | |
71 | ||
c66ac9db | 72 | static int transport_generic_write_pending(struct se_cmd *); |
5951146d | 73 | static int transport_processing_thread(void *param); |
c66ac9db NB |
74 | static int __transport_execute_tasks(struct se_device *dev); |
75 | static void transport_complete_task_attr(struct se_cmd *cmd); | |
07bde79a NB |
76 | static int transport_complete_qf(struct se_cmd *cmd); |
77 | static void transport_handle_queue_full(struct se_cmd *cmd, | |
78 | struct se_device *dev, int (*qf_callback)(struct se_cmd *)); | |
c66ac9db NB |
79 | static void transport_direct_request_timeout(struct se_cmd *cmd); |
80 | static void transport_free_dev_tasks(struct se_cmd *cmd); | |
a1d8b49a | 81 | static u32 transport_allocate_tasks(struct se_cmd *cmd, |
ec98f782 | 82 | unsigned long long starting_lba, |
c66ac9db | 83 | enum dma_data_direction data_direction, |
ec98f782 | 84 | struct scatterlist *sgl, unsigned int nents); |
05d1c7c0 | 85 | static int transport_generic_get_mem(struct se_cmd *cmd); |
39c05f32 | 86 | static void transport_put_cmd(struct se_cmd *cmd); |
c66ac9db NB |
87 | static void transport_remove_cmd_from_queue(struct se_cmd *cmd, |
88 | struct se_queue_obj *qobj); | |
89 | static int transport_set_sense_codes(struct se_cmd *cmd, u8 asc, u8 ascq); | |
90 | static void transport_stop_all_task_timers(struct se_cmd *cmd); | |
91 | ||
e3d6f909 | 92 | int init_se_kmem_caches(void) |
c66ac9db | 93 | { |
c66ac9db NB |
94 | se_cmd_cache = kmem_cache_create("se_cmd_cache", |
95 | sizeof(struct se_cmd), __alignof__(struct se_cmd), 0, NULL); | |
6708bb27 AG |
96 | if (!se_cmd_cache) { |
97 | pr_err("kmem_cache_create for struct se_cmd failed\n"); | |
c66ac9db NB |
98 | goto out; |
99 | } | |
100 | se_tmr_req_cache = kmem_cache_create("se_tmr_cache", | |
101 | sizeof(struct se_tmr_req), __alignof__(struct se_tmr_req), | |
102 | 0, NULL); | |
6708bb27 AG |
103 | if (!se_tmr_req_cache) { |
104 | pr_err("kmem_cache_create() for struct se_tmr_req" | |
c66ac9db NB |
105 | " failed\n"); |
106 | goto out; | |
107 | } | |
108 | se_sess_cache = kmem_cache_create("se_sess_cache", | |
109 | sizeof(struct se_session), __alignof__(struct se_session), | |
110 | 0, NULL); | |
6708bb27 AG |
111 | if (!se_sess_cache) { |
112 | pr_err("kmem_cache_create() for struct se_session" | |
c66ac9db NB |
113 | " failed\n"); |
114 | goto out; | |
115 | } | |
116 | se_ua_cache = kmem_cache_create("se_ua_cache", | |
117 | sizeof(struct se_ua), __alignof__(struct se_ua), | |
118 | 0, NULL); | |
6708bb27 AG |
119 | if (!se_ua_cache) { |
120 | pr_err("kmem_cache_create() for struct se_ua failed\n"); | |
c66ac9db NB |
121 | goto out; |
122 | } | |
c66ac9db NB |
123 | t10_pr_reg_cache = kmem_cache_create("t10_pr_reg_cache", |
124 | sizeof(struct t10_pr_registration), | |
125 | __alignof__(struct t10_pr_registration), 0, NULL); | |
6708bb27 AG |
126 | if (!t10_pr_reg_cache) { |
127 | pr_err("kmem_cache_create() for struct t10_pr_registration" | |
c66ac9db NB |
128 | " failed\n"); |
129 | goto out; | |
130 | } | |
131 | t10_alua_lu_gp_cache = kmem_cache_create("t10_alua_lu_gp_cache", | |
132 | sizeof(struct t10_alua_lu_gp), __alignof__(struct t10_alua_lu_gp), | |
133 | 0, NULL); | |
6708bb27 AG |
134 | if (!t10_alua_lu_gp_cache) { |
135 | pr_err("kmem_cache_create() for t10_alua_lu_gp_cache" | |
c66ac9db NB |
136 | " failed\n"); |
137 | goto out; | |
138 | } | |
139 | t10_alua_lu_gp_mem_cache = kmem_cache_create("t10_alua_lu_gp_mem_cache", | |
140 | sizeof(struct t10_alua_lu_gp_member), | |
141 | __alignof__(struct t10_alua_lu_gp_member), 0, NULL); | |
6708bb27 AG |
142 | if (!t10_alua_lu_gp_mem_cache) { |
143 | pr_err("kmem_cache_create() for t10_alua_lu_gp_mem_" | |
c66ac9db NB |
144 | "cache failed\n"); |
145 | goto out; | |
146 | } | |
147 | t10_alua_tg_pt_gp_cache = kmem_cache_create("t10_alua_tg_pt_gp_cache", | |
148 | sizeof(struct t10_alua_tg_pt_gp), | |
149 | __alignof__(struct t10_alua_tg_pt_gp), 0, NULL); | |
6708bb27 AG |
150 | if (!t10_alua_tg_pt_gp_cache) { |
151 | pr_err("kmem_cache_create() for t10_alua_tg_pt_gp_" | |
c66ac9db NB |
152 | "cache failed\n"); |
153 | goto out; | |
154 | } | |
155 | t10_alua_tg_pt_gp_mem_cache = kmem_cache_create( | |
156 | "t10_alua_tg_pt_gp_mem_cache", | |
157 | sizeof(struct t10_alua_tg_pt_gp_member), | |
158 | __alignof__(struct t10_alua_tg_pt_gp_member), | |
159 | 0, NULL); | |
6708bb27 AG |
160 | if (!t10_alua_tg_pt_gp_mem_cache) { |
161 | pr_err("kmem_cache_create() for t10_alua_tg_pt_gp_" | |
c66ac9db NB |
162 | "mem_t failed\n"); |
163 | goto out; | |
164 | } | |
165 | ||
c66ac9db NB |
166 | return 0; |
167 | out: | |
168 | if (se_cmd_cache) | |
169 | kmem_cache_destroy(se_cmd_cache); | |
170 | if (se_tmr_req_cache) | |
171 | kmem_cache_destroy(se_tmr_req_cache); | |
172 | if (se_sess_cache) | |
173 | kmem_cache_destroy(se_sess_cache); | |
174 | if (se_ua_cache) | |
175 | kmem_cache_destroy(se_ua_cache); | |
c66ac9db NB |
176 | if (t10_pr_reg_cache) |
177 | kmem_cache_destroy(t10_pr_reg_cache); | |
178 | if (t10_alua_lu_gp_cache) | |
179 | kmem_cache_destroy(t10_alua_lu_gp_cache); | |
180 | if (t10_alua_lu_gp_mem_cache) | |
181 | kmem_cache_destroy(t10_alua_lu_gp_mem_cache); | |
182 | if (t10_alua_tg_pt_gp_cache) | |
183 | kmem_cache_destroy(t10_alua_tg_pt_gp_cache); | |
184 | if (t10_alua_tg_pt_gp_mem_cache) | |
185 | kmem_cache_destroy(t10_alua_tg_pt_gp_mem_cache); | |
e3d6f909 | 186 | return -ENOMEM; |
c66ac9db NB |
187 | } |
188 | ||
e3d6f909 | 189 | void release_se_kmem_caches(void) |
c66ac9db | 190 | { |
c66ac9db NB |
191 | kmem_cache_destroy(se_cmd_cache); |
192 | kmem_cache_destroy(se_tmr_req_cache); | |
193 | kmem_cache_destroy(se_sess_cache); | |
194 | kmem_cache_destroy(se_ua_cache); | |
c66ac9db NB |
195 | kmem_cache_destroy(t10_pr_reg_cache); |
196 | kmem_cache_destroy(t10_alua_lu_gp_cache); | |
197 | kmem_cache_destroy(t10_alua_lu_gp_mem_cache); | |
198 | kmem_cache_destroy(t10_alua_tg_pt_gp_cache); | |
199 | kmem_cache_destroy(t10_alua_tg_pt_gp_mem_cache); | |
c66ac9db NB |
200 | } |
201 | ||
e3d6f909 AG |
202 | /* This code ensures unique mib indexes are handed out. */ |
203 | static DEFINE_SPINLOCK(scsi_mib_index_lock); | |
204 | static u32 scsi_mib_index[SCSI_INDEX_TYPE_MAX]; | |
e89d15ee NB |
205 | |
206 | /* | |
207 | * Allocate a new row index for the entry type specified | |
208 | */ | |
209 | u32 scsi_get_new_index(scsi_index_t type) | |
210 | { | |
211 | u32 new_index; | |
212 | ||
e3d6f909 | 213 | BUG_ON((type < 0) || (type >= SCSI_INDEX_TYPE_MAX)); |
e89d15ee | 214 | |
e3d6f909 AG |
215 | spin_lock(&scsi_mib_index_lock); |
216 | new_index = ++scsi_mib_index[type]; | |
217 | spin_unlock(&scsi_mib_index_lock); | |
e89d15ee NB |
218 | |
219 | return new_index; | |
220 | } | |
221 | ||
c66ac9db NB |
222 | void transport_init_queue_obj(struct se_queue_obj *qobj) |
223 | { | |
224 | atomic_set(&qobj->queue_cnt, 0); | |
225 | INIT_LIST_HEAD(&qobj->qobj_list); | |
226 | init_waitqueue_head(&qobj->thread_wq); | |
227 | spin_lock_init(&qobj->cmd_queue_lock); | |
228 | } | |
229 | EXPORT_SYMBOL(transport_init_queue_obj); | |
230 | ||
231 | static int transport_subsystem_reqmods(void) | |
232 | { | |
233 | int ret; | |
234 | ||
235 | ret = request_module("target_core_iblock"); | |
236 | if (ret != 0) | |
6708bb27 | 237 | pr_err("Unable to load target_core_iblock\n"); |
c66ac9db NB |
238 | |
239 | ret = request_module("target_core_file"); | |
240 | if (ret != 0) | |
6708bb27 | 241 | pr_err("Unable to load target_core_file\n"); |
c66ac9db NB |
242 | |
243 | ret = request_module("target_core_pscsi"); | |
244 | if (ret != 0) | |
6708bb27 | 245 | pr_err("Unable to load target_core_pscsi\n"); |
c66ac9db NB |
246 | |
247 | ret = request_module("target_core_stgt"); | |
248 | if (ret != 0) | |
6708bb27 | 249 | pr_err("Unable to load target_core_stgt\n"); |
c66ac9db NB |
250 | |
251 | return 0; | |
252 | } | |
253 | ||
254 | int transport_subsystem_check_init(void) | |
255 | { | |
e3d6f909 AG |
256 | int ret; |
257 | ||
258 | if (sub_api_initialized) | |
c66ac9db NB |
259 | return 0; |
260 | /* | |
261 | * Request the loading of known TCM subsystem plugins.. | |
262 | */ | |
e3d6f909 AG |
263 | ret = transport_subsystem_reqmods(); |
264 | if (ret < 0) | |
265 | return ret; | |
c66ac9db | 266 | |
e3d6f909 | 267 | sub_api_initialized = 1; |
c66ac9db NB |
268 | return 0; |
269 | } | |
270 | ||
271 | struct se_session *transport_init_session(void) | |
272 | { | |
273 | struct se_session *se_sess; | |
274 | ||
275 | se_sess = kmem_cache_zalloc(se_sess_cache, GFP_KERNEL); | |
6708bb27 AG |
276 | if (!se_sess) { |
277 | pr_err("Unable to allocate struct se_session from" | |
c66ac9db NB |
278 | " se_sess_cache\n"); |
279 | return ERR_PTR(-ENOMEM); | |
280 | } | |
281 | INIT_LIST_HEAD(&se_sess->sess_list); | |
282 | INIT_LIST_HEAD(&se_sess->sess_acl_list); | |
c66ac9db NB |
283 | |
284 | return se_sess; | |
285 | } | |
286 | EXPORT_SYMBOL(transport_init_session); | |
287 | ||
288 | /* | |
289 | * Called with spin_lock_bh(&struct se_portal_group->session_lock called. | |
290 | */ | |
291 | void __transport_register_session( | |
292 | struct se_portal_group *se_tpg, | |
293 | struct se_node_acl *se_nacl, | |
294 | struct se_session *se_sess, | |
295 | void *fabric_sess_ptr) | |
296 | { | |
297 | unsigned char buf[PR_REG_ISID_LEN]; | |
298 | ||
299 | se_sess->se_tpg = se_tpg; | |
300 | se_sess->fabric_sess_ptr = fabric_sess_ptr; | |
301 | /* | |
302 | * Used by struct se_node_acl's under ConfigFS to locate active se_session-t | |
303 | * | |
304 | * Only set for struct se_session's that will actually be moving I/O. | |
305 | * eg: *NOT* discovery sessions. | |
306 | */ | |
307 | if (se_nacl) { | |
308 | /* | |
309 | * If the fabric module supports an ISID based TransportID, | |
310 | * save this value in binary from the fabric I_T Nexus now. | |
311 | */ | |
e3d6f909 | 312 | if (se_tpg->se_tpg_tfo->sess_get_initiator_sid != NULL) { |
c66ac9db | 313 | memset(&buf[0], 0, PR_REG_ISID_LEN); |
e3d6f909 | 314 | se_tpg->se_tpg_tfo->sess_get_initiator_sid(se_sess, |
c66ac9db NB |
315 | &buf[0], PR_REG_ISID_LEN); |
316 | se_sess->sess_bin_isid = get_unaligned_be64(&buf[0]); | |
317 | } | |
318 | spin_lock_irq(&se_nacl->nacl_sess_lock); | |
319 | /* | |
320 | * The se_nacl->nacl_sess pointer will be set to the | |
321 | * last active I_T Nexus for each struct se_node_acl. | |
322 | */ | |
323 | se_nacl->nacl_sess = se_sess; | |
324 | ||
325 | list_add_tail(&se_sess->sess_acl_list, | |
326 | &se_nacl->acl_sess_list); | |
327 | spin_unlock_irq(&se_nacl->nacl_sess_lock); | |
328 | } | |
329 | list_add_tail(&se_sess->sess_list, &se_tpg->tpg_sess_list); | |
330 | ||
6708bb27 | 331 | pr_debug("TARGET_CORE[%s]: Registered fabric_sess_ptr: %p\n", |
e3d6f909 | 332 | se_tpg->se_tpg_tfo->get_fabric_name(), se_sess->fabric_sess_ptr); |
c66ac9db NB |
333 | } |
334 | EXPORT_SYMBOL(__transport_register_session); | |
335 | ||
336 | void transport_register_session( | |
337 | struct se_portal_group *se_tpg, | |
338 | struct se_node_acl *se_nacl, | |
339 | struct se_session *se_sess, | |
340 | void *fabric_sess_ptr) | |
341 | { | |
342 | spin_lock_bh(&se_tpg->session_lock); | |
343 | __transport_register_session(se_tpg, se_nacl, se_sess, fabric_sess_ptr); | |
344 | spin_unlock_bh(&se_tpg->session_lock); | |
345 | } | |
346 | EXPORT_SYMBOL(transport_register_session); | |
347 | ||
348 | void transport_deregister_session_configfs(struct se_session *se_sess) | |
349 | { | |
350 | struct se_node_acl *se_nacl; | |
23388864 | 351 | unsigned long flags; |
c66ac9db NB |
352 | /* |
353 | * Used by struct se_node_acl's under ConfigFS to locate active struct se_session | |
354 | */ | |
355 | se_nacl = se_sess->se_node_acl; | |
6708bb27 | 356 | if (se_nacl) { |
23388864 | 357 | spin_lock_irqsave(&se_nacl->nacl_sess_lock, flags); |
c66ac9db NB |
358 | list_del(&se_sess->sess_acl_list); |
359 | /* | |
360 | * If the session list is empty, then clear the pointer. | |
361 | * Otherwise, set the struct se_session pointer from the tail | |
362 | * element of the per struct se_node_acl active session list. | |
363 | */ | |
364 | if (list_empty(&se_nacl->acl_sess_list)) | |
365 | se_nacl->nacl_sess = NULL; | |
366 | else { | |
367 | se_nacl->nacl_sess = container_of( | |
368 | se_nacl->acl_sess_list.prev, | |
369 | struct se_session, sess_acl_list); | |
370 | } | |
23388864 | 371 | spin_unlock_irqrestore(&se_nacl->nacl_sess_lock, flags); |
c66ac9db NB |
372 | } |
373 | } | |
374 | EXPORT_SYMBOL(transport_deregister_session_configfs); | |
375 | ||
376 | void transport_free_session(struct se_session *se_sess) | |
377 | { | |
378 | kmem_cache_free(se_sess_cache, se_sess); | |
379 | } | |
380 | EXPORT_SYMBOL(transport_free_session); | |
381 | ||
382 | void transport_deregister_session(struct se_session *se_sess) | |
383 | { | |
384 | struct se_portal_group *se_tpg = se_sess->se_tpg; | |
385 | struct se_node_acl *se_nacl; | |
e63a8e19 | 386 | unsigned long flags; |
c66ac9db | 387 | |
6708bb27 | 388 | if (!se_tpg) { |
c66ac9db NB |
389 | transport_free_session(se_sess); |
390 | return; | |
391 | } | |
c66ac9db | 392 | |
e63a8e19 | 393 | spin_lock_irqsave(&se_tpg->session_lock, flags); |
c66ac9db NB |
394 | list_del(&se_sess->sess_list); |
395 | se_sess->se_tpg = NULL; | |
396 | se_sess->fabric_sess_ptr = NULL; | |
e63a8e19 | 397 | spin_unlock_irqrestore(&se_tpg->session_lock, flags); |
c66ac9db NB |
398 | |
399 | /* | |
400 | * Determine if we need to do extra work for this initiator node's | |
401 | * struct se_node_acl if it had been previously dynamically generated. | |
402 | */ | |
403 | se_nacl = se_sess->se_node_acl; | |
6708bb27 | 404 | if (se_nacl) { |
e63a8e19 | 405 | spin_lock_irqsave(&se_tpg->acl_node_lock, flags); |
c66ac9db | 406 | if (se_nacl->dynamic_node_acl) { |
6708bb27 AG |
407 | if (!se_tpg->se_tpg_tfo->tpg_check_demo_mode_cache( |
408 | se_tpg)) { | |
c66ac9db NB |
409 | list_del(&se_nacl->acl_list); |
410 | se_tpg->num_node_acls--; | |
e63a8e19 | 411 | spin_unlock_irqrestore(&se_tpg->acl_node_lock, flags); |
c66ac9db NB |
412 | |
413 | core_tpg_wait_for_nacl_pr_ref(se_nacl); | |
c66ac9db | 414 | core_free_device_list_for_node(se_nacl, se_tpg); |
e3d6f909 | 415 | se_tpg->se_tpg_tfo->tpg_release_fabric_acl(se_tpg, |
c66ac9db | 416 | se_nacl); |
e63a8e19 | 417 | spin_lock_irqsave(&se_tpg->acl_node_lock, flags); |
c66ac9db NB |
418 | } |
419 | } | |
e63a8e19 | 420 | spin_unlock_irqrestore(&se_tpg->acl_node_lock, flags); |
c66ac9db NB |
421 | } |
422 | ||
423 | transport_free_session(se_sess); | |
424 | ||
6708bb27 | 425 | pr_debug("TARGET_CORE[%s]: Deregistered fabric_sess\n", |
e3d6f909 | 426 | se_tpg->se_tpg_tfo->get_fabric_name()); |
c66ac9db NB |
427 | } |
428 | EXPORT_SYMBOL(transport_deregister_session); | |
429 | ||
430 | /* | |
a1d8b49a | 431 | * Called with cmd->t_state_lock held. |
c66ac9db NB |
432 | */ |
433 | static void transport_all_task_dev_remove_state(struct se_cmd *cmd) | |
434 | { | |
435 | struct se_device *dev; | |
436 | struct se_task *task; | |
437 | unsigned long flags; | |
438 | ||
a1d8b49a | 439 | list_for_each_entry(task, &cmd->t_task_list, t_list) { |
c66ac9db | 440 | dev = task->se_dev; |
6708bb27 | 441 | if (!dev) |
c66ac9db NB |
442 | continue; |
443 | ||
444 | if (atomic_read(&task->task_active)) | |
445 | continue; | |
446 | ||
6708bb27 | 447 | if (!atomic_read(&task->task_state_active)) |
c66ac9db NB |
448 | continue; |
449 | ||
450 | spin_lock_irqsave(&dev->execute_task_lock, flags); | |
451 | list_del(&task->t_state_list); | |
6708bb27 AG |
452 | pr_debug("Removed ITT: 0x%08x dev: %p task[%p]\n", |
453 | cmd->se_tfo->get_task_tag(cmd), dev, task); | |
c66ac9db NB |
454 | spin_unlock_irqrestore(&dev->execute_task_lock, flags); |
455 | ||
456 | atomic_set(&task->task_state_active, 0); | |
a1d8b49a | 457 | atomic_dec(&cmd->t_task_cdbs_ex_left); |
c66ac9db NB |
458 | } |
459 | } | |
460 | ||
461 | /* transport_cmd_check_stop(): | |
462 | * | |
463 | * 'transport_off = 1' determines if t_transport_active should be cleared. | |
464 | * 'transport_off = 2' determines if task_dev_state should be removed. | |
465 | * | |
466 | * A non-zero u8 t_state sets cmd->t_state. | |
467 | * Returns 1 when command is stopped, else 0. | |
468 | */ | |
469 | static int transport_cmd_check_stop( | |
470 | struct se_cmd *cmd, | |
471 | int transport_off, | |
472 | u8 t_state) | |
473 | { | |
474 | unsigned long flags; | |
475 | ||
a1d8b49a | 476 | spin_lock_irqsave(&cmd->t_state_lock, flags); |
c66ac9db NB |
477 | /* |
478 | * Determine if IOCTL context caller in requesting the stopping of this | |
479 | * command for LUN shutdown purposes. | |
480 | */ | |
a1d8b49a | 481 | if (atomic_read(&cmd->transport_lun_stop)) { |
6708bb27 | 482 | pr_debug("%s:%d atomic_read(&cmd->transport_lun_stop)" |
c66ac9db | 483 | " == TRUE for ITT: 0x%08x\n", __func__, __LINE__, |
e3d6f909 | 484 | cmd->se_tfo->get_task_tag(cmd)); |
c66ac9db NB |
485 | |
486 | cmd->deferred_t_state = cmd->t_state; | |
487 | cmd->t_state = TRANSPORT_DEFERRED_CMD; | |
a1d8b49a | 488 | atomic_set(&cmd->t_transport_active, 0); |
c66ac9db NB |
489 | if (transport_off == 2) |
490 | transport_all_task_dev_remove_state(cmd); | |
a1d8b49a | 491 | spin_unlock_irqrestore(&cmd->t_state_lock, flags); |
c66ac9db | 492 | |
a1d8b49a | 493 | complete(&cmd->transport_lun_stop_comp); |
c66ac9db NB |
494 | return 1; |
495 | } | |
496 | /* | |
497 | * Determine if frontend context caller is requesting the stopping of | |
e3d6f909 | 498 | * this command for frontend exceptions. |
c66ac9db | 499 | */ |
a1d8b49a | 500 | if (atomic_read(&cmd->t_transport_stop)) { |
6708bb27 | 501 | pr_debug("%s:%d atomic_read(&cmd->t_transport_stop) ==" |
c66ac9db | 502 | " TRUE for ITT: 0x%08x\n", __func__, __LINE__, |
e3d6f909 | 503 | cmd->se_tfo->get_task_tag(cmd)); |
c66ac9db NB |
504 | |
505 | cmd->deferred_t_state = cmd->t_state; | |
506 | cmd->t_state = TRANSPORT_DEFERRED_CMD; | |
507 | if (transport_off == 2) | |
508 | transport_all_task_dev_remove_state(cmd); | |
509 | ||
510 | /* | |
511 | * Clear struct se_cmd->se_lun before the transport_off == 2 handoff | |
512 | * to FE. | |
513 | */ | |
514 | if (transport_off == 2) | |
515 | cmd->se_lun = NULL; | |
a1d8b49a | 516 | spin_unlock_irqrestore(&cmd->t_state_lock, flags); |
c66ac9db | 517 | |
a1d8b49a | 518 | complete(&cmd->t_transport_stop_comp); |
c66ac9db NB |
519 | return 1; |
520 | } | |
521 | if (transport_off) { | |
a1d8b49a | 522 | atomic_set(&cmd->t_transport_active, 0); |
c66ac9db NB |
523 | if (transport_off == 2) { |
524 | transport_all_task_dev_remove_state(cmd); | |
525 | /* | |
526 | * Clear struct se_cmd->se_lun before the transport_off == 2 | |
527 | * handoff to fabric module. | |
528 | */ | |
529 | cmd->se_lun = NULL; | |
530 | /* | |
531 | * Some fabric modules like tcm_loop can release | |
25985edc | 532 | * their internally allocated I/O reference now and |
c66ac9db NB |
533 | * struct se_cmd now. |
534 | */ | |
e3d6f909 | 535 | if (cmd->se_tfo->check_stop_free != NULL) { |
c66ac9db | 536 | spin_unlock_irqrestore( |
a1d8b49a | 537 | &cmd->t_state_lock, flags); |
c66ac9db | 538 | |
e3d6f909 | 539 | cmd->se_tfo->check_stop_free(cmd); |
c66ac9db NB |
540 | return 1; |
541 | } | |
542 | } | |
a1d8b49a | 543 | spin_unlock_irqrestore(&cmd->t_state_lock, flags); |
c66ac9db NB |
544 | |
545 | return 0; | |
546 | } else if (t_state) | |
547 | cmd->t_state = t_state; | |
a1d8b49a | 548 | spin_unlock_irqrestore(&cmd->t_state_lock, flags); |
c66ac9db NB |
549 | |
550 | return 0; | |
551 | } | |
552 | ||
553 | static int transport_cmd_check_stop_to_fabric(struct se_cmd *cmd) | |
554 | { | |
555 | return transport_cmd_check_stop(cmd, 2, 0); | |
556 | } | |
557 | ||
558 | static void transport_lun_remove_cmd(struct se_cmd *cmd) | |
559 | { | |
e3d6f909 | 560 | struct se_lun *lun = cmd->se_lun; |
c66ac9db NB |
561 | unsigned long flags; |
562 | ||
563 | if (!lun) | |
564 | return; | |
565 | ||
a1d8b49a | 566 | spin_lock_irqsave(&cmd->t_state_lock, flags); |
6708bb27 | 567 | if (!atomic_read(&cmd->transport_dev_active)) { |
a1d8b49a | 568 | spin_unlock_irqrestore(&cmd->t_state_lock, flags); |
c66ac9db NB |
569 | goto check_lun; |
570 | } | |
a1d8b49a | 571 | atomic_set(&cmd->transport_dev_active, 0); |
c66ac9db | 572 | transport_all_task_dev_remove_state(cmd); |
a1d8b49a | 573 | spin_unlock_irqrestore(&cmd->t_state_lock, flags); |
c66ac9db | 574 | |
c66ac9db NB |
575 | |
576 | check_lun: | |
577 | spin_lock_irqsave(&lun->lun_cmd_lock, flags); | |
a1d8b49a | 578 | if (atomic_read(&cmd->transport_lun_active)) { |
5951146d | 579 | list_del(&cmd->se_lun_node); |
a1d8b49a | 580 | atomic_set(&cmd->transport_lun_active, 0); |
c66ac9db | 581 | #if 0 |
6708bb27 | 582 | pr_debug("Removed ITT: 0x%08x from LUN LIST[%d]\n" |
e3d6f909 | 583 | cmd->se_tfo->get_task_tag(cmd), lun->unpacked_lun); |
c66ac9db NB |
584 | #endif |
585 | } | |
586 | spin_unlock_irqrestore(&lun->lun_cmd_lock, flags); | |
587 | } | |
588 | ||
589 | void transport_cmd_finish_abort(struct se_cmd *cmd, int remove) | |
590 | { | |
8dc52b54 NB |
591 | if (!cmd->se_tmr_req) |
592 | transport_lun_remove_cmd(cmd); | |
c66ac9db NB |
593 | |
594 | if (transport_cmd_check_stop_to_fabric(cmd)) | |
595 | return; | |
77039d1e NB |
596 | if (remove) { |
597 | transport_remove_cmd_from_queue(cmd, &cmd->se_dev->dev_queue_obj); | |
e6a2573f | 598 | transport_put_cmd(cmd); |
77039d1e | 599 | } |
c66ac9db NB |
600 | } |
601 | ||
5951146d | 602 | static void transport_add_cmd_to_queue( |
c66ac9db NB |
603 | struct se_cmd *cmd, |
604 | int t_state) | |
605 | { | |
606 | struct se_device *dev = cmd->se_dev; | |
e3d6f909 | 607 | struct se_queue_obj *qobj = &dev->dev_queue_obj; |
c66ac9db NB |
608 | unsigned long flags; |
609 | ||
c66ac9db | 610 | if (t_state) { |
a1d8b49a | 611 | spin_lock_irqsave(&cmd->t_state_lock, flags); |
c66ac9db | 612 | cmd->t_state = t_state; |
a1d8b49a AG |
613 | atomic_set(&cmd->t_transport_active, 1); |
614 | spin_unlock_irqrestore(&cmd->t_state_lock, flags); | |
c66ac9db NB |
615 | } |
616 | ||
617 | spin_lock_irqsave(&qobj->cmd_queue_lock, flags); | |
79a7fef2 RD |
618 | |
619 | /* If the cmd is already on the list, remove it before we add it */ | |
620 | if (!list_empty(&cmd->se_queue_node)) | |
621 | list_del(&cmd->se_queue_node); | |
622 | else | |
623 | atomic_inc(&qobj->queue_cnt); | |
624 | ||
07bde79a NB |
625 | if (cmd->se_cmd_flags & SCF_EMULATE_QUEUE_FULL) { |
626 | cmd->se_cmd_flags &= ~SCF_EMULATE_QUEUE_FULL; | |
627 | list_add(&cmd->se_queue_node, &qobj->qobj_list); | |
628 | } else | |
629 | list_add_tail(&cmd->se_queue_node, &qobj->qobj_list); | |
79a7fef2 | 630 | atomic_set(&cmd->t_transport_queue_active, 1); |
c66ac9db NB |
631 | spin_unlock_irqrestore(&qobj->cmd_queue_lock, flags); |
632 | ||
c66ac9db | 633 | wake_up_interruptible(&qobj->thread_wq); |
c66ac9db NB |
634 | } |
635 | ||
5951146d AG |
636 | static struct se_cmd * |
637 | transport_get_cmd_from_queue(struct se_queue_obj *qobj) | |
c66ac9db | 638 | { |
5951146d | 639 | struct se_cmd *cmd; |
c66ac9db NB |
640 | unsigned long flags; |
641 | ||
642 | spin_lock_irqsave(&qobj->cmd_queue_lock, flags); | |
643 | if (list_empty(&qobj->qobj_list)) { | |
644 | spin_unlock_irqrestore(&qobj->cmd_queue_lock, flags); | |
645 | return NULL; | |
646 | } | |
5951146d | 647 | cmd = list_first_entry(&qobj->qobj_list, struct se_cmd, se_queue_node); |
c66ac9db | 648 | |
79a7fef2 | 649 | atomic_set(&cmd->t_transport_queue_active, 0); |
c66ac9db | 650 | |
79a7fef2 | 651 | list_del_init(&cmd->se_queue_node); |
c66ac9db NB |
652 | atomic_dec(&qobj->queue_cnt); |
653 | spin_unlock_irqrestore(&qobj->cmd_queue_lock, flags); | |
654 | ||
5951146d | 655 | return cmd; |
c66ac9db NB |
656 | } |
657 | ||
658 | static void transport_remove_cmd_from_queue(struct se_cmd *cmd, | |
659 | struct se_queue_obj *qobj) | |
660 | { | |
c66ac9db NB |
661 | unsigned long flags; |
662 | ||
663 | spin_lock_irqsave(&qobj->cmd_queue_lock, flags); | |
6708bb27 | 664 | if (!atomic_read(&cmd->t_transport_queue_active)) { |
c66ac9db NB |
665 | spin_unlock_irqrestore(&qobj->cmd_queue_lock, flags); |
666 | return; | |
667 | } | |
79a7fef2 RD |
668 | atomic_set(&cmd->t_transport_queue_active, 0); |
669 | atomic_dec(&qobj->queue_cnt); | |
670 | list_del_init(&cmd->se_queue_node); | |
c66ac9db NB |
671 | spin_unlock_irqrestore(&qobj->cmd_queue_lock, flags); |
672 | ||
a1d8b49a | 673 | if (atomic_read(&cmd->t_transport_queue_active)) { |
6708bb27 | 674 | pr_err("ITT: 0x%08x t_transport_queue_active: %d\n", |
e3d6f909 | 675 | cmd->se_tfo->get_task_tag(cmd), |
a1d8b49a | 676 | atomic_read(&cmd->t_transport_queue_active)); |
c66ac9db NB |
677 | } |
678 | } | |
679 | ||
680 | /* | |
681 | * Completion function used by TCM subsystem plugins (such as FILEIO) | |
682 | * for queueing up response from struct se_subsystem_api->do_task() | |
683 | */ | |
684 | void transport_complete_sync_cache(struct se_cmd *cmd, int good) | |
685 | { | |
a1d8b49a | 686 | struct se_task *task = list_entry(cmd->t_task_list.next, |
c66ac9db NB |
687 | struct se_task, t_list); |
688 | ||
689 | if (good) { | |
690 | cmd->scsi_status = SAM_STAT_GOOD; | |
691 | task->task_scsi_status = GOOD; | |
692 | } else { | |
693 | task->task_scsi_status = SAM_STAT_CHECK_CONDITION; | |
694 | task->task_error_status = PYX_TRANSPORT_ILLEGAL_REQUEST; | |
e3d6f909 | 695 | task->task_se_cmd->transport_error_status = |
c66ac9db NB |
696 | PYX_TRANSPORT_ILLEGAL_REQUEST; |
697 | } | |
698 | ||
699 | transport_complete_task(task, good); | |
700 | } | |
701 | EXPORT_SYMBOL(transport_complete_sync_cache); | |
702 | ||
703 | /* transport_complete_task(): | |
704 | * | |
705 | * Called from interrupt and non interrupt context depending | |
706 | * on the transport plugin. | |
707 | */ | |
708 | void transport_complete_task(struct se_task *task, int success) | |
709 | { | |
e3d6f909 | 710 | struct se_cmd *cmd = task->task_se_cmd; |
c66ac9db NB |
711 | struct se_device *dev = task->se_dev; |
712 | int t_state; | |
713 | unsigned long flags; | |
714 | #if 0 | |
6708bb27 | 715 | pr_debug("task: %p CDB: 0x%02x obj_ptr: %p\n", task, |
a1d8b49a | 716 | cmd->t_task_cdb[0], dev); |
c66ac9db | 717 | #endif |
e3d6f909 | 718 | if (dev) |
c66ac9db | 719 | atomic_inc(&dev->depth_left); |
c66ac9db | 720 | |
a1d8b49a | 721 | spin_lock_irqsave(&cmd->t_state_lock, flags); |
c66ac9db NB |
722 | atomic_set(&task->task_active, 0); |
723 | ||
724 | /* | |
725 | * See if any sense data exists, if so set the TASK_SENSE flag. | |
726 | * Also check for any other post completion work that needs to be | |
727 | * done by the plugins. | |
728 | */ | |
729 | if (dev && dev->transport->transport_complete) { | |
730 | if (dev->transport->transport_complete(task) != 0) { | |
731 | cmd->se_cmd_flags |= SCF_TRANSPORT_TASK_SENSE; | |
732 | task->task_sense = 1; | |
733 | success = 1; | |
734 | } | |
735 | } | |
736 | ||
737 | /* | |
738 | * See if we are waiting for outstanding struct se_task | |
739 | * to complete for an exception condition | |
740 | */ | |
741 | if (atomic_read(&task->task_stop)) { | |
742 | /* | |
a1d8b49a | 743 | * Decrement cmd->t_se_count if this task had |
c66ac9db NB |
744 | * previously thrown its timeout exception handler. |
745 | */ | |
746 | if (atomic_read(&task->task_timeout)) { | |
a1d8b49a | 747 | atomic_dec(&cmd->t_se_count); |
c66ac9db NB |
748 | atomic_set(&task->task_timeout, 0); |
749 | } | |
a1d8b49a | 750 | spin_unlock_irqrestore(&cmd->t_state_lock, flags); |
c66ac9db NB |
751 | |
752 | complete(&task->task_stop_comp); | |
753 | return; | |
754 | } | |
755 | /* | |
756 | * If the task's timeout handler has fired, use the t_task_cdbs_timeout | |
757 | * left counter to determine when the struct se_cmd is ready to be queued to | |
758 | * the processing thread. | |
759 | */ | |
760 | if (atomic_read(&task->task_timeout)) { | |
6708bb27 AG |
761 | if (!atomic_dec_and_test( |
762 | &cmd->t_task_cdbs_timeout_left)) { | |
a1d8b49a | 763 | spin_unlock_irqrestore(&cmd->t_state_lock, |
c66ac9db NB |
764 | flags); |
765 | return; | |
766 | } | |
767 | t_state = TRANSPORT_COMPLETE_TIMEOUT; | |
a1d8b49a | 768 | spin_unlock_irqrestore(&cmd->t_state_lock, flags); |
c66ac9db NB |
769 | |
770 | transport_add_cmd_to_queue(cmd, t_state); | |
771 | return; | |
772 | } | |
a1d8b49a | 773 | atomic_dec(&cmd->t_task_cdbs_timeout_left); |
c66ac9db NB |
774 | |
775 | /* | |
776 | * Decrement the outstanding t_task_cdbs_left count. The last | |
777 | * struct se_task from struct se_cmd will complete itself into the | |
778 | * device queue depending upon int success. | |
779 | */ | |
6708bb27 | 780 | if (!atomic_dec_and_test(&cmd->t_task_cdbs_left)) { |
c66ac9db | 781 | if (!success) |
a1d8b49a | 782 | cmd->t_tasks_failed = 1; |
c66ac9db | 783 | |
a1d8b49a | 784 | spin_unlock_irqrestore(&cmd->t_state_lock, flags); |
c66ac9db NB |
785 | return; |
786 | } | |
787 | ||
a1d8b49a | 788 | if (!success || cmd->t_tasks_failed) { |
c66ac9db NB |
789 | t_state = TRANSPORT_COMPLETE_FAILURE; |
790 | if (!task->task_error_status) { | |
791 | task->task_error_status = | |
792 | PYX_TRANSPORT_UNKNOWN_SAM_OPCODE; | |
793 | cmd->transport_error_status = | |
794 | PYX_TRANSPORT_UNKNOWN_SAM_OPCODE; | |
795 | } | |
796 | } else { | |
a1d8b49a | 797 | atomic_set(&cmd->t_transport_complete, 1); |
c66ac9db NB |
798 | t_state = TRANSPORT_COMPLETE_OK; |
799 | } | |
a1d8b49a | 800 | spin_unlock_irqrestore(&cmd->t_state_lock, flags); |
c66ac9db NB |
801 | |
802 | transport_add_cmd_to_queue(cmd, t_state); | |
803 | } | |
804 | EXPORT_SYMBOL(transport_complete_task); | |
805 | ||
806 | /* | |
807 | * Called by transport_add_tasks_from_cmd() once a struct se_cmd's | |
808 | * struct se_task list are ready to be added to the active execution list | |
809 | * struct se_device | |
810 | ||
811 | * Called with se_dev_t->execute_task_lock called. | |
812 | */ | |
813 | static inline int transport_add_task_check_sam_attr( | |
814 | struct se_task *task, | |
815 | struct se_task *task_prev, | |
816 | struct se_device *dev) | |
817 | { | |
818 | /* | |
819 | * No SAM Task attribute emulation enabled, add to tail of | |
820 | * execution queue | |
821 | */ | |
822 | if (dev->dev_task_attr_type != SAM_TASK_ATTR_EMULATED) { | |
823 | list_add_tail(&task->t_execute_list, &dev->execute_task_list); | |
824 | return 0; | |
825 | } | |
826 | /* | |
827 | * HEAD_OF_QUEUE attribute for received CDB, which means | |
828 | * the first task that is associated with a struct se_cmd goes to | |
829 | * head of the struct se_device->execute_task_list, and task_prev | |
830 | * after that for each subsequent task | |
831 | */ | |
e66ecd50 | 832 | if (task->task_se_cmd->sam_task_attr == MSG_HEAD_TAG) { |
c66ac9db NB |
833 | list_add(&task->t_execute_list, |
834 | (task_prev != NULL) ? | |
835 | &task_prev->t_execute_list : | |
836 | &dev->execute_task_list); | |
837 | ||
6708bb27 | 838 | pr_debug("Set HEAD_OF_QUEUE for task CDB: 0x%02x" |
c66ac9db | 839 | " in execution queue\n", |
6708bb27 | 840 | task->task_se_cmd->t_task_cdb[0]); |
c66ac9db NB |
841 | return 1; |
842 | } | |
843 | /* | |
844 | * For ORDERED, SIMPLE or UNTAGGED attribute tasks once they have been | |
845 | * transitioned from Dermant -> Active state, and are added to the end | |
846 | * of the struct se_device->execute_task_list | |
847 | */ | |
848 | list_add_tail(&task->t_execute_list, &dev->execute_task_list); | |
849 | return 0; | |
850 | } | |
851 | ||
852 | /* __transport_add_task_to_execute_queue(): | |
853 | * | |
854 | * Called with se_dev_t->execute_task_lock called. | |
855 | */ | |
856 | static void __transport_add_task_to_execute_queue( | |
857 | struct se_task *task, | |
858 | struct se_task *task_prev, | |
859 | struct se_device *dev) | |
860 | { | |
861 | int head_of_queue; | |
862 | ||
863 | head_of_queue = transport_add_task_check_sam_attr(task, task_prev, dev); | |
864 | atomic_inc(&dev->execute_tasks); | |
865 | ||
866 | if (atomic_read(&task->task_state_active)) | |
867 | return; | |
868 | /* | |
869 | * Determine if this task needs to go to HEAD_OF_QUEUE for the | |
870 | * state list as well. Running with SAM Task Attribute emulation | |
871 | * will always return head_of_queue == 0 here | |
872 | */ | |
873 | if (head_of_queue) | |
874 | list_add(&task->t_state_list, (task_prev) ? | |
875 | &task_prev->t_state_list : | |
876 | &dev->state_task_list); | |
877 | else | |
878 | list_add_tail(&task->t_state_list, &dev->state_task_list); | |
879 | ||
880 | atomic_set(&task->task_state_active, 1); | |
881 | ||
6708bb27 | 882 | pr_debug("Added ITT: 0x%08x task[%p] to dev: %p\n", |
e3d6f909 | 883 | task->task_se_cmd->se_tfo->get_task_tag(task->task_se_cmd), |
c66ac9db NB |
884 | task, dev); |
885 | } | |
886 | ||
887 | static void transport_add_tasks_to_state_queue(struct se_cmd *cmd) | |
888 | { | |
889 | struct se_device *dev; | |
890 | struct se_task *task; | |
891 | unsigned long flags; | |
892 | ||
a1d8b49a AG |
893 | spin_lock_irqsave(&cmd->t_state_lock, flags); |
894 | list_for_each_entry(task, &cmd->t_task_list, t_list) { | |
c66ac9db NB |
895 | dev = task->se_dev; |
896 | ||
897 | if (atomic_read(&task->task_state_active)) | |
898 | continue; | |
899 | ||
900 | spin_lock(&dev->execute_task_lock); | |
901 | list_add_tail(&task->t_state_list, &dev->state_task_list); | |
902 | atomic_set(&task->task_state_active, 1); | |
903 | ||
6708bb27 AG |
904 | pr_debug("Added ITT: 0x%08x task[%p] to dev: %p\n", |
905 | task->task_se_cmd->se_tfo->get_task_tag( | |
c66ac9db NB |
906 | task->task_se_cmd), task, dev); |
907 | ||
908 | spin_unlock(&dev->execute_task_lock); | |
909 | } | |
a1d8b49a | 910 | spin_unlock_irqrestore(&cmd->t_state_lock, flags); |
c66ac9db NB |
911 | } |
912 | ||
913 | static void transport_add_tasks_from_cmd(struct se_cmd *cmd) | |
914 | { | |
5951146d | 915 | struct se_device *dev = cmd->se_dev; |
c66ac9db NB |
916 | struct se_task *task, *task_prev = NULL; |
917 | unsigned long flags; | |
918 | ||
919 | spin_lock_irqsave(&dev->execute_task_lock, flags); | |
a1d8b49a | 920 | list_for_each_entry(task, &cmd->t_task_list, t_list) { |
c66ac9db NB |
921 | if (atomic_read(&task->task_execute_queue)) |
922 | continue; | |
923 | /* | |
924 | * __transport_add_task_to_execute_queue() handles the | |
925 | * SAM Task Attribute emulation if enabled | |
926 | */ | |
927 | __transport_add_task_to_execute_queue(task, task_prev, dev); | |
928 | atomic_set(&task->task_execute_queue, 1); | |
929 | task_prev = task; | |
930 | } | |
931 | spin_unlock_irqrestore(&dev->execute_task_lock, flags); | |
c66ac9db NB |
932 | } |
933 | ||
934 | /* transport_remove_task_from_execute_queue(): | |
935 | * | |
936 | * | |
937 | */ | |
52208ae3 | 938 | void transport_remove_task_from_execute_queue( |
c66ac9db NB |
939 | struct se_task *task, |
940 | struct se_device *dev) | |
941 | { | |
942 | unsigned long flags; | |
943 | ||
af57c3ac NB |
944 | if (atomic_read(&task->task_execute_queue) == 0) { |
945 | dump_stack(); | |
946 | return; | |
947 | } | |
948 | ||
c66ac9db NB |
949 | spin_lock_irqsave(&dev->execute_task_lock, flags); |
950 | list_del(&task->t_execute_list); | |
af57c3ac | 951 | atomic_set(&task->task_execute_queue, 0); |
c66ac9db NB |
952 | atomic_dec(&dev->execute_tasks); |
953 | spin_unlock_irqrestore(&dev->execute_task_lock, flags); | |
954 | } | |
955 | ||
07bde79a NB |
956 | /* |
957 | * Handle QUEUE_FULL / -EAGAIN status | |
958 | */ | |
959 | ||
960 | static void target_qf_do_work(struct work_struct *work) | |
961 | { | |
962 | struct se_device *dev = container_of(work, struct se_device, | |
963 | qf_work_queue); | |
bcac364a | 964 | LIST_HEAD(qf_cmd_list); |
07bde79a NB |
965 | struct se_cmd *cmd, *cmd_tmp; |
966 | ||
967 | spin_lock_irq(&dev->qf_cmd_lock); | |
bcac364a RD |
968 | list_splice_init(&dev->qf_cmd_list, &qf_cmd_list); |
969 | spin_unlock_irq(&dev->qf_cmd_lock); | |
07bde79a | 970 | |
bcac364a | 971 | list_for_each_entry_safe(cmd, cmd_tmp, &qf_cmd_list, se_qf_node) { |
07bde79a NB |
972 | list_del(&cmd->se_qf_node); |
973 | atomic_dec(&dev->dev_qf_count); | |
974 | smp_mb__after_atomic_dec(); | |
07bde79a | 975 | |
6708bb27 | 976 | pr_debug("Processing %s cmd: %p QUEUE_FULL in work queue" |
07bde79a NB |
977 | " context: %s\n", cmd->se_tfo->get_fabric_name(), cmd, |
978 | (cmd->t_state == TRANSPORT_COMPLETE_OK) ? "COMPLETE_OK" : | |
979 | (cmd->t_state == TRANSPORT_COMPLETE_QF_WP) ? "WRITE_PENDING" | |
980 | : "UNKNOWN"); | |
981 | /* | |
982 | * The SCF_EMULATE_QUEUE_FULL flag will be cleared once se_cmd | |
983 | * has been added to head of queue | |
984 | */ | |
985 | transport_add_cmd_to_queue(cmd, cmd->t_state); | |
07bde79a | 986 | } |
07bde79a NB |
987 | } |
988 | ||
c66ac9db NB |
989 | unsigned char *transport_dump_cmd_direction(struct se_cmd *cmd) |
990 | { | |
991 | switch (cmd->data_direction) { | |
992 | case DMA_NONE: | |
993 | return "NONE"; | |
994 | case DMA_FROM_DEVICE: | |
995 | return "READ"; | |
996 | case DMA_TO_DEVICE: | |
997 | return "WRITE"; | |
998 | case DMA_BIDIRECTIONAL: | |
999 | return "BIDI"; | |
1000 | default: | |
1001 | break; | |
1002 | } | |
1003 | ||
1004 | return "UNKNOWN"; | |
1005 | } | |
1006 | ||
1007 | void transport_dump_dev_state( | |
1008 | struct se_device *dev, | |
1009 | char *b, | |
1010 | int *bl) | |
1011 | { | |
1012 | *bl += sprintf(b + *bl, "Status: "); | |
1013 | switch (dev->dev_status) { | |
1014 | case TRANSPORT_DEVICE_ACTIVATED: | |
1015 | *bl += sprintf(b + *bl, "ACTIVATED"); | |
1016 | break; | |
1017 | case TRANSPORT_DEVICE_DEACTIVATED: | |
1018 | *bl += sprintf(b + *bl, "DEACTIVATED"); | |
1019 | break; | |
1020 | case TRANSPORT_DEVICE_SHUTDOWN: | |
1021 | *bl += sprintf(b + *bl, "SHUTDOWN"); | |
1022 | break; | |
1023 | case TRANSPORT_DEVICE_OFFLINE_ACTIVATED: | |
1024 | case TRANSPORT_DEVICE_OFFLINE_DEACTIVATED: | |
1025 | *bl += sprintf(b + *bl, "OFFLINE"); | |
1026 | break; | |
1027 | default: | |
1028 | *bl += sprintf(b + *bl, "UNKNOWN=%d", dev->dev_status); | |
1029 | break; | |
1030 | } | |
1031 | ||
1032 | *bl += sprintf(b + *bl, " Execute/Left/Max Queue Depth: %d/%d/%d", | |
1033 | atomic_read(&dev->execute_tasks), atomic_read(&dev->depth_left), | |
1034 | dev->queue_depth); | |
1035 | *bl += sprintf(b + *bl, " SectorSize: %u MaxSectors: %u\n", | |
e3d6f909 | 1036 | dev->se_sub_dev->se_dev_attrib.block_size, dev->se_sub_dev->se_dev_attrib.max_sectors); |
c66ac9db NB |
1037 | *bl += sprintf(b + *bl, " "); |
1038 | } | |
1039 | ||
c66ac9db NB |
1040 | void transport_dump_vpd_proto_id( |
1041 | struct t10_vpd *vpd, | |
1042 | unsigned char *p_buf, | |
1043 | int p_buf_len) | |
1044 | { | |
1045 | unsigned char buf[VPD_TMP_BUF_SIZE]; | |
1046 | int len; | |
1047 | ||
1048 | memset(buf, 0, VPD_TMP_BUF_SIZE); | |
1049 | len = sprintf(buf, "T10 VPD Protocol Identifier: "); | |
1050 | ||
1051 | switch (vpd->protocol_identifier) { | |
1052 | case 0x00: | |
1053 | sprintf(buf+len, "Fibre Channel\n"); | |
1054 | break; | |
1055 | case 0x10: | |
1056 | sprintf(buf+len, "Parallel SCSI\n"); | |
1057 | break; | |
1058 | case 0x20: | |
1059 | sprintf(buf+len, "SSA\n"); | |
1060 | break; | |
1061 | case 0x30: | |
1062 | sprintf(buf+len, "IEEE 1394\n"); | |
1063 | break; | |
1064 | case 0x40: | |
1065 | sprintf(buf+len, "SCSI Remote Direct Memory Access" | |
1066 | " Protocol\n"); | |
1067 | break; | |
1068 | case 0x50: | |
1069 | sprintf(buf+len, "Internet SCSI (iSCSI)\n"); | |
1070 | break; | |
1071 | case 0x60: | |
1072 | sprintf(buf+len, "SAS Serial SCSI Protocol\n"); | |
1073 | break; | |
1074 | case 0x70: | |
1075 | sprintf(buf+len, "Automation/Drive Interface Transport" | |
1076 | " Protocol\n"); | |
1077 | break; | |
1078 | case 0x80: | |
1079 | sprintf(buf+len, "AT Attachment Interface ATA/ATAPI\n"); | |
1080 | break; | |
1081 | default: | |
1082 | sprintf(buf+len, "Unknown 0x%02x\n", | |
1083 | vpd->protocol_identifier); | |
1084 | break; | |
1085 | } | |
1086 | ||
1087 | if (p_buf) | |
1088 | strncpy(p_buf, buf, p_buf_len); | |
1089 | else | |
6708bb27 | 1090 | pr_debug("%s", buf); |
c66ac9db NB |
1091 | } |
1092 | ||
1093 | void | |
1094 | transport_set_vpd_proto_id(struct t10_vpd *vpd, unsigned char *page_83) | |
1095 | { | |
1096 | /* | |
1097 | * Check if the Protocol Identifier Valid (PIV) bit is set.. | |
1098 | * | |
1099 | * from spc3r23.pdf section 7.5.1 | |
1100 | */ | |
1101 | if (page_83[1] & 0x80) { | |
1102 | vpd->protocol_identifier = (page_83[0] & 0xf0); | |
1103 | vpd->protocol_identifier_set = 1; | |
1104 | transport_dump_vpd_proto_id(vpd, NULL, 0); | |
1105 | } | |
1106 | } | |
1107 | EXPORT_SYMBOL(transport_set_vpd_proto_id); | |
1108 | ||
1109 | int transport_dump_vpd_assoc( | |
1110 | struct t10_vpd *vpd, | |
1111 | unsigned char *p_buf, | |
1112 | int p_buf_len) | |
1113 | { | |
1114 | unsigned char buf[VPD_TMP_BUF_SIZE]; | |
e3d6f909 AG |
1115 | int ret = 0; |
1116 | int len; | |
c66ac9db NB |
1117 | |
1118 | memset(buf, 0, VPD_TMP_BUF_SIZE); | |
1119 | len = sprintf(buf, "T10 VPD Identifier Association: "); | |
1120 | ||
1121 | switch (vpd->association) { | |
1122 | case 0x00: | |
1123 | sprintf(buf+len, "addressed logical unit\n"); | |
1124 | break; | |
1125 | case 0x10: | |
1126 | sprintf(buf+len, "target port\n"); | |
1127 | break; | |
1128 | case 0x20: | |
1129 | sprintf(buf+len, "SCSI target device\n"); | |
1130 | break; | |
1131 | default: | |
1132 | sprintf(buf+len, "Unknown 0x%02x\n", vpd->association); | |
e3d6f909 | 1133 | ret = -EINVAL; |
c66ac9db NB |
1134 | break; |
1135 | } | |
1136 | ||
1137 | if (p_buf) | |
1138 | strncpy(p_buf, buf, p_buf_len); | |
1139 | else | |
6708bb27 | 1140 | pr_debug("%s", buf); |
c66ac9db NB |
1141 | |
1142 | return ret; | |
1143 | } | |
1144 | ||
1145 | int transport_set_vpd_assoc(struct t10_vpd *vpd, unsigned char *page_83) | |
1146 | { | |
1147 | /* | |
1148 | * The VPD identification association.. | |
1149 | * | |
1150 | * from spc3r23.pdf Section 7.6.3.1 Table 297 | |
1151 | */ | |
1152 | vpd->association = (page_83[1] & 0x30); | |
1153 | return transport_dump_vpd_assoc(vpd, NULL, 0); | |
1154 | } | |
1155 | EXPORT_SYMBOL(transport_set_vpd_assoc); | |
1156 | ||
1157 | int transport_dump_vpd_ident_type( | |
1158 | struct t10_vpd *vpd, | |
1159 | unsigned char *p_buf, | |
1160 | int p_buf_len) | |
1161 | { | |
1162 | unsigned char buf[VPD_TMP_BUF_SIZE]; | |
e3d6f909 AG |
1163 | int ret = 0; |
1164 | int len; | |
c66ac9db NB |
1165 | |
1166 | memset(buf, 0, VPD_TMP_BUF_SIZE); | |
1167 | len = sprintf(buf, "T10 VPD Identifier Type: "); | |
1168 | ||
1169 | switch (vpd->device_identifier_type) { | |
1170 | case 0x00: | |
1171 | sprintf(buf+len, "Vendor specific\n"); | |
1172 | break; | |
1173 | case 0x01: | |
1174 | sprintf(buf+len, "T10 Vendor ID based\n"); | |
1175 | break; | |
1176 | case 0x02: | |
1177 | sprintf(buf+len, "EUI-64 based\n"); | |
1178 | break; | |
1179 | case 0x03: | |
1180 | sprintf(buf+len, "NAA\n"); | |
1181 | break; | |
1182 | case 0x04: | |
1183 | sprintf(buf+len, "Relative target port identifier\n"); | |
1184 | break; | |
1185 | case 0x08: | |
1186 | sprintf(buf+len, "SCSI name string\n"); | |
1187 | break; | |
1188 | default: | |
1189 | sprintf(buf+len, "Unsupported: 0x%02x\n", | |
1190 | vpd->device_identifier_type); | |
e3d6f909 | 1191 | ret = -EINVAL; |
c66ac9db NB |
1192 | break; |
1193 | } | |
1194 | ||
e3d6f909 AG |
1195 | if (p_buf) { |
1196 | if (p_buf_len < strlen(buf)+1) | |
1197 | return -EINVAL; | |
c66ac9db | 1198 | strncpy(p_buf, buf, p_buf_len); |
e3d6f909 | 1199 | } else { |
6708bb27 | 1200 | pr_debug("%s", buf); |
e3d6f909 | 1201 | } |
c66ac9db NB |
1202 | |
1203 | return ret; | |
1204 | } | |
1205 | ||
1206 | int transport_set_vpd_ident_type(struct t10_vpd *vpd, unsigned char *page_83) | |
1207 | { | |
1208 | /* | |
1209 | * The VPD identifier type.. | |
1210 | * | |
1211 | * from spc3r23.pdf Section 7.6.3.1 Table 298 | |
1212 | */ | |
1213 | vpd->device_identifier_type = (page_83[1] & 0x0f); | |
1214 | return transport_dump_vpd_ident_type(vpd, NULL, 0); | |
1215 | } | |
1216 | EXPORT_SYMBOL(transport_set_vpd_ident_type); | |
1217 | ||
1218 | int transport_dump_vpd_ident( | |
1219 | struct t10_vpd *vpd, | |
1220 | unsigned char *p_buf, | |
1221 | int p_buf_len) | |
1222 | { | |
1223 | unsigned char buf[VPD_TMP_BUF_SIZE]; | |
1224 | int ret = 0; | |
1225 | ||
1226 | memset(buf, 0, VPD_TMP_BUF_SIZE); | |
1227 | ||
1228 | switch (vpd->device_identifier_code_set) { | |
1229 | case 0x01: /* Binary */ | |
1230 | sprintf(buf, "T10 VPD Binary Device Identifier: %s\n", | |
1231 | &vpd->device_identifier[0]); | |
1232 | break; | |
1233 | case 0x02: /* ASCII */ | |
1234 | sprintf(buf, "T10 VPD ASCII Device Identifier: %s\n", | |
1235 | &vpd->device_identifier[0]); | |
1236 | break; | |
1237 | case 0x03: /* UTF-8 */ | |
1238 | sprintf(buf, "T10 VPD UTF-8 Device Identifier: %s\n", | |
1239 | &vpd->device_identifier[0]); | |
1240 | break; | |
1241 | default: | |
1242 | sprintf(buf, "T10 VPD Device Identifier encoding unsupported:" | |
1243 | " 0x%02x", vpd->device_identifier_code_set); | |
e3d6f909 | 1244 | ret = -EINVAL; |
c66ac9db NB |
1245 | break; |
1246 | } | |
1247 | ||
1248 | if (p_buf) | |
1249 | strncpy(p_buf, buf, p_buf_len); | |
1250 | else | |
6708bb27 | 1251 | pr_debug("%s", buf); |
c66ac9db NB |
1252 | |
1253 | return ret; | |
1254 | } | |
1255 | ||
1256 | int | |
1257 | transport_set_vpd_ident(struct t10_vpd *vpd, unsigned char *page_83) | |
1258 | { | |
1259 | static const char hex_str[] = "0123456789abcdef"; | |
1260 | int j = 0, i = 4; /* offset to start of the identifer */ | |
1261 | ||
1262 | /* | |
1263 | * The VPD Code Set (encoding) | |
1264 | * | |
1265 | * from spc3r23.pdf Section 7.6.3.1 Table 296 | |
1266 | */ | |
1267 | vpd->device_identifier_code_set = (page_83[0] & 0x0f); | |
1268 | switch (vpd->device_identifier_code_set) { | |
1269 | case 0x01: /* Binary */ | |
1270 | vpd->device_identifier[j++] = | |
1271 | hex_str[vpd->device_identifier_type]; | |
1272 | while (i < (4 + page_83[3])) { | |
1273 | vpd->device_identifier[j++] = | |
1274 | hex_str[(page_83[i] & 0xf0) >> 4]; | |
1275 | vpd->device_identifier[j++] = | |
1276 | hex_str[page_83[i] & 0x0f]; | |
1277 | i++; | |
1278 | } | |
1279 | break; | |
1280 | case 0x02: /* ASCII */ | |
1281 | case 0x03: /* UTF-8 */ | |
1282 | while (i < (4 + page_83[3])) | |
1283 | vpd->device_identifier[j++] = page_83[i++]; | |
1284 | break; | |
1285 | default: | |
1286 | break; | |
1287 | } | |
1288 | ||
1289 | return transport_dump_vpd_ident(vpd, NULL, 0); | |
1290 | } | |
1291 | EXPORT_SYMBOL(transport_set_vpd_ident); | |
1292 | ||
1293 | static void core_setup_task_attr_emulation(struct se_device *dev) | |
1294 | { | |
1295 | /* | |
1296 | * If this device is from Target_Core_Mod/pSCSI, disable the | |
1297 | * SAM Task Attribute emulation. | |
1298 | * | |
1299 | * This is currently not available in upsream Linux/SCSI Target | |
1300 | * mode code, and is assumed to be disabled while using TCM/pSCSI. | |
1301 | */ | |
e3d6f909 | 1302 | if (dev->transport->transport_type == TRANSPORT_PLUGIN_PHBA_PDEV) { |
c66ac9db NB |
1303 | dev->dev_task_attr_type = SAM_TASK_ATTR_PASSTHROUGH; |
1304 | return; | |
1305 | } | |
1306 | ||
1307 | dev->dev_task_attr_type = SAM_TASK_ATTR_EMULATED; | |
6708bb27 | 1308 | pr_debug("%s: Using SAM_TASK_ATTR_EMULATED for SPC: 0x%02x" |
e3d6f909 AG |
1309 | " device\n", dev->transport->name, |
1310 | dev->transport->get_device_rev(dev)); | |
c66ac9db NB |
1311 | } |
1312 | ||
1313 | static void scsi_dump_inquiry(struct se_device *dev) | |
1314 | { | |
e3d6f909 | 1315 | struct t10_wwn *wwn = &dev->se_sub_dev->t10_wwn; |
c66ac9db NB |
1316 | int i, device_type; |
1317 | /* | |
1318 | * Print Linux/SCSI style INQUIRY formatting to the kernel ring buffer | |
1319 | */ | |
6708bb27 | 1320 | pr_debug(" Vendor: "); |
c66ac9db NB |
1321 | for (i = 0; i < 8; i++) |
1322 | if (wwn->vendor[i] >= 0x20) | |
6708bb27 | 1323 | pr_debug("%c", wwn->vendor[i]); |
c66ac9db | 1324 | else |
6708bb27 | 1325 | pr_debug(" "); |
c66ac9db | 1326 | |
6708bb27 | 1327 | pr_debug(" Model: "); |
c66ac9db NB |
1328 | for (i = 0; i < 16; i++) |
1329 | if (wwn->model[i] >= 0x20) | |
6708bb27 | 1330 | pr_debug("%c", wwn->model[i]); |
c66ac9db | 1331 | else |
6708bb27 | 1332 | pr_debug(" "); |
c66ac9db | 1333 | |
6708bb27 | 1334 | pr_debug(" Revision: "); |
c66ac9db NB |
1335 | for (i = 0; i < 4; i++) |
1336 | if (wwn->revision[i] >= 0x20) | |
6708bb27 | 1337 | pr_debug("%c", wwn->revision[i]); |
c66ac9db | 1338 | else |
6708bb27 | 1339 | pr_debug(" "); |
c66ac9db | 1340 | |
6708bb27 | 1341 | pr_debug("\n"); |
c66ac9db | 1342 | |
e3d6f909 | 1343 | device_type = dev->transport->get_device_type(dev); |
6708bb27 AG |
1344 | pr_debug(" Type: %s ", scsi_device_type(device_type)); |
1345 | pr_debug(" ANSI SCSI revision: %02x\n", | |
e3d6f909 | 1346 | dev->transport->get_device_rev(dev)); |
c66ac9db NB |
1347 | } |
1348 | ||
1349 | struct se_device *transport_add_device_to_core_hba( | |
1350 | struct se_hba *hba, | |
1351 | struct se_subsystem_api *transport, | |
1352 | struct se_subsystem_dev *se_dev, | |
1353 | u32 device_flags, | |
1354 | void *transport_dev, | |
1355 | struct se_dev_limits *dev_limits, | |
1356 | const char *inquiry_prod, | |
1357 | const char *inquiry_rev) | |
1358 | { | |
12a18bdc | 1359 | int force_pt; |
c66ac9db NB |
1360 | struct se_device *dev; |
1361 | ||
1362 | dev = kzalloc(sizeof(struct se_device), GFP_KERNEL); | |
6708bb27 AG |
1363 | if (!dev) { |
1364 | pr_err("Unable to allocate memory for se_dev_t\n"); | |
c66ac9db NB |
1365 | return NULL; |
1366 | } | |
c66ac9db | 1367 | |
e3d6f909 | 1368 | transport_init_queue_obj(&dev->dev_queue_obj); |
c66ac9db NB |
1369 | dev->dev_flags = device_flags; |
1370 | dev->dev_status |= TRANSPORT_DEVICE_DEACTIVATED; | |
5951146d | 1371 | dev->dev_ptr = transport_dev; |
c66ac9db NB |
1372 | dev->se_hba = hba; |
1373 | dev->se_sub_dev = se_dev; | |
1374 | dev->transport = transport; | |
1375 | atomic_set(&dev->active_cmds, 0); | |
1376 | INIT_LIST_HEAD(&dev->dev_list); | |
1377 | INIT_LIST_HEAD(&dev->dev_sep_list); | |
1378 | INIT_LIST_HEAD(&dev->dev_tmr_list); | |
1379 | INIT_LIST_HEAD(&dev->execute_task_list); | |
1380 | INIT_LIST_HEAD(&dev->delayed_cmd_list); | |
1381 | INIT_LIST_HEAD(&dev->ordered_cmd_list); | |
1382 | INIT_LIST_HEAD(&dev->state_task_list); | |
07bde79a | 1383 | INIT_LIST_HEAD(&dev->qf_cmd_list); |
c66ac9db NB |
1384 | spin_lock_init(&dev->execute_task_lock); |
1385 | spin_lock_init(&dev->delayed_cmd_lock); | |
1386 | spin_lock_init(&dev->ordered_cmd_lock); | |
1387 | spin_lock_init(&dev->state_task_lock); | |
1388 | spin_lock_init(&dev->dev_alua_lock); | |
1389 | spin_lock_init(&dev->dev_reservation_lock); | |
1390 | spin_lock_init(&dev->dev_status_lock); | |
1391 | spin_lock_init(&dev->dev_status_thr_lock); | |
1392 | spin_lock_init(&dev->se_port_lock); | |
1393 | spin_lock_init(&dev->se_tmr_lock); | |
07bde79a | 1394 | spin_lock_init(&dev->qf_cmd_lock); |
c66ac9db NB |
1395 | |
1396 | dev->queue_depth = dev_limits->queue_depth; | |
1397 | atomic_set(&dev->depth_left, dev->queue_depth); | |
1398 | atomic_set(&dev->dev_ordered_id, 0); | |
1399 | ||
1400 | se_dev_set_default_attribs(dev, dev_limits); | |
1401 | ||
1402 | dev->dev_index = scsi_get_new_index(SCSI_DEVICE_INDEX); | |
1403 | dev->creation_time = get_jiffies_64(); | |
1404 | spin_lock_init(&dev->stats_lock); | |
1405 | ||
1406 | spin_lock(&hba->device_lock); | |
1407 | list_add_tail(&dev->dev_list, &hba->hba_dev_list); | |
1408 | hba->dev_count++; | |
1409 | spin_unlock(&hba->device_lock); | |
1410 | /* | |
1411 | * Setup the SAM Task Attribute emulation for struct se_device | |
1412 | */ | |
1413 | core_setup_task_attr_emulation(dev); | |
1414 | /* | |
1415 | * Force PR and ALUA passthrough emulation with internal object use. | |
1416 | */ | |
1417 | force_pt = (hba->hba_flags & HBA_FLAGS_INTERNAL_USE); | |
1418 | /* | |
1419 | * Setup the Reservations infrastructure for struct se_device | |
1420 | */ | |
1421 | core_setup_reservations(dev, force_pt); | |
1422 | /* | |
1423 | * Setup the Asymmetric Logical Unit Assignment for struct se_device | |
1424 | */ | |
1425 | if (core_setup_alua(dev, force_pt) < 0) | |
1426 | goto out; | |
1427 | ||
1428 | /* | |
1429 | * Startup the struct se_device processing thread | |
1430 | */ | |
1431 | dev->process_thread = kthread_run(transport_processing_thread, dev, | |
e3d6f909 | 1432 | "LIO_%s", dev->transport->name); |
c66ac9db | 1433 | if (IS_ERR(dev->process_thread)) { |
6708bb27 | 1434 | pr_err("Unable to create kthread: LIO_%s\n", |
e3d6f909 | 1435 | dev->transport->name); |
c66ac9db NB |
1436 | goto out; |
1437 | } | |
07bde79a NB |
1438 | /* |
1439 | * Setup work_queue for QUEUE_FULL | |
1440 | */ | |
1441 | INIT_WORK(&dev->qf_work_queue, target_qf_do_work); | |
c66ac9db NB |
1442 | /* |
1443 | * Preload the initial INQUIRY const values if we are doing | |
1444 | * anything virtual (IBLOCK, FILEIO, RAMDISK), but not for TCM/pSCSI | |
1445 | * passthrough because this is being provided by the backend LLD. | |
1446 | * This is required so that transport_get_inquiry() copies these | |
1447 | * originals once back into DEV_T10_WWN(dev) for the virtual device | |
1448 | * setup. | |
1449 | */ | |
e3d6f909 | 1450 | if (dev->transport->transport_type != TRANSPORT_PLUGIN_PHBA_PDEV) { |
f22c1196 | 1451 | if (!inquiry_prod || !inquiry_rev) { |
6708bb27 | 1452 | pr_err("All non TCM/pSCSI plugins require" |
c66ac9db NB |
1453 | " INQUIRY consts\n"); |
1454 | goto out; | |
1455 | } | |
1456 | ||
e3d6f909 AG |
1457 | strncpy(&dev->se_sub_dev->t10_wwn.vendor[0], "LIO-ORG", 8); |
1458 | strncpy(&dev->se_sub_dev->t10_wwn.model[0], inquiry_prod, 16); | |
1459 | strncpy(&dev->se_sub_dev->t10_wwn.revision[0], inquiry_rev, 4); | |
c66ac9db NB |
1460 | } |
1461 | scsi_dump_inquiry(dev); | |
1462 | ||
12a18bdc | 1463 | return dev; |
c66ac9db | 1464 | out: |
c66ac9db NB |
1465 | kthread_stop(dev->process_thread); |
1466 | ||
1467 | spin_lock(&hba->device_lock); | |
1468 | list_del(&dev->dev_list); | |
1469 | hba->dev_count--; | |
1470 | spin_unlock(&hba->device_lock); | |
1471 | ||
1472 | se_release_vpd_for_dev(dev); | |
1473 | ||
c66ac9db NB |
1474 | kfree(dev); |
1475 | ||
1476 | return NULL; | |
1477 | } | |
1478 | EXPORT_SYMBOL(transport_add_device_to_core_hba); | |
1479 | ||
1480 | /* transport_generic_prepare_cdb(): | |
1481 | * | |
1482 | * Since the Initiator sees iSCSI devices as LUNs, the SCSI CDB will | |
1483 | * contain the iSCSI LUN in bits 7-5 of byte 1 as per SAM-2. | |
1484 | * The point of this is since we are mapping iSCSI LUNs to | |
1485 | * SCSI Target IDs having a non-zero LUN in the CDB will throw the | |
1486 | * devices and HBAs for a loop. | |
1487 | */ | |
1488 | static inline void transport_generic_prepare_cdb( | |
1489 | unsigned char *cdb) | |
1490 | { | |
1491 | switch (cdb[0]) { | |
1492 | case READ_10: /* SBC - RDProtect */ | |
1493 | case READ_12: /* SBC - RDProtect */ | |
1494 | case READ_16: /* SBC - RDProtect */ | |
1495 | case SEND_DIAGNOSTIC: /* SPC - SELF-TEST Code */ | |
1496 | case VERIFY: /* SBC - VRProtect */ | |
1497 | case VERIFY_16: /* SBC - VRProtect */ | |
1498 | case WRITE_VERIFY: /* SBC - VRProtect */ | |
1499 | case WRITE_VERIFY_12: /* SBC - VRProtect */ | |
1500 | break; | |
1501 | default: | |
1502 | cdb[1] &= 0x1f; /* clear logical unit number */ | |
1503 | break; | |
1504 | } | |
1505 | } | |
1506 | ||
1507 | static struct se_task * | |
1508 | transport_generic_get_task(struct se_cmd *cmd, | |
1509 | enum dma_data_direction data_direction) | |
1510 | { | |
1511 | struct se_task *task; | |
5951146d | 1512 | struct se_device *dev = cmd->se_dev; |
c66ac9db | 1513 | |
6708bb27 | 1514 | task = dev->transport->alloc_task(cmd->t_task_cdb); |
c66ac9db | 1515 | if (!task) { |
6708bb27 | 1516 | pr_err("Unable to allocate struct se_task\n"); |
c66ac9db NB |
1517 | return NULL; |
1518 | } | |
1519 | ||
1520 | INIT_LIST_HEAD(&task->t_list); | |
1521 | INIT_LIST_HEAD(&task->t_execute_list); | |
1522 | INIT_LIST_HEAD(&task->t_state_list); | |
1523 | init_completion(&task->task_stop_comp); | |
c66ac9db NB |
1524 | task->task_se_cmd = cmd; |
1525 | task->se_dev = dev; | |
1526 | task->task_data_direction = data_direction; | |
1527 | ||
c66ac9db NB |
1528 | return task; |
1529 | } | |
1530 | ||
1531 | static int transport_generic_cmd_sequencer(struct se_cmd *, unsigned char *); | |
1532 | ||
c66ac9db NB |
1533 | /* |
1534 | * Used by fabric modules containing a local struct se_cmd within their | |
1535 | * fabric dependent per I/O descriptor. | |
1536 | */ | |
1537 | void transport_init_se_cmd( | |
1538 | struct se_cmd *cmd, | |
1539 | struct target_core_fabric_ops *tfo, | |
1540 | struct se_session *se_sess, | |
1541 | u32 data_length, | |
1542 | int data_direction, | |
1543 | int task_attr, | |
1544 | unsigned char *sense_buffer) | |
1545 | { | |
5951146d AG |
1546 | INIT_LIST_HEAD(&cmd->se_lun_node); |
1547 | INIT_LIST_HEAD(&cmd->se_delayed_node); | |
1548 | INIT_LIST_HEAD(&cmd->se_ordered_node); | |
07bde79a | 1549 | INIT_LIST_HEAD(&cmd->se_qf_node); |
79a7fef2 | 1550 | INIT_LIST_HEAD(&cmd->se_queue_node); |
c66ac9db | 1551 | |
a1d8b49a AG |
1552 | INIT_LIST_HEAD(&cmd->t_task_list); |
1553 | init_completion(&cmd->transport_lun_fe_stop_comp); | |
1554 | init_completion(&cmd->transport_lun_stop_comp); | |
1555 | init_completion(&cmd->t_transport_stop_comp); | |
1556 | spin_lock_init(&cmd->t_state_lock); | |
1557 | atomic_set(&cmd->transport_dev_active, 1); | |
c66ac9db NB |
1558 | |
1559 | cmd->se_tfo = tfo; | |
1560 | cmd->se_sess = se_sess; | |
1561 | cmd->data_length = data_length; | |
1562 | cmd->data_direction = data_direction; | |
1563 | cmd->sam_task_attr = task_attr; | |
1564 | cmd->sense_buffer = sense_buffer; | |
1565 | } | |
1566 | EXPORT_SYMBOL(transport_init_se_cmd); | |
1567 | ||
1568 | static int transport_check_alloc_task_attr(struct se_cmd *cmd) | |
1569 | { | |
1570 | /* | |
1571 | * Check if SAM Task Attribute emulation is enabled for this | |
1572 | * struct se_device storage object | |
1573 | */ | |
5951146d | 1574 | if (cmd->se_dev->dev_task_attr_type != SAM_TASK_ATTR_EMULATED) |
c66ac9db NB |
1575 | return 0; |
1576 | ||
e66ecd50 | 1577 | if (cmd->sam_task_attr == MSG_ACA_TAG) { |
6708bb27 | 1578 | pr_debug("SAM Task Attribute ACA" |
c66ac9db | 1579 | " emulation is not supported\n"); |
e3d6f909 | 1580 | return -EINVAL; |
c66ac9db NB |
1581 | } |
1582 | /* | |
1583 | * Used to determine when ORDERED commands should go from | |
1584 | * Dormant to Active status. | |
1585 | */ | |
5951146d | 1586 | cmd->se_ordered_id = atomic_inc_return(&cmd->se_dev->dev_ordered_id); |
c66ac9db | 1587 | smp_mb__after_atomic_inc(); |
6708bb27 | 1588 | pr_debug("Allocated se_ordered_id: %u for Task Attr: 0x%02x on %s\n", |
c66ac9db | 1589 | cmd->se_ordered_id, cmd->sam_task_attr, |
6708bb27 | 1590 | cmd->se_dev->transport->name); |
c66ac9db NB |
1591 | return 0; |
1592 | } | |
1593 | ||
c66ac9db NB |
1594 | /* transport_generic_allocate_tasks(): |
1595 | * | |
1596 | * Called from fabric RX Thread. | |
1597 | */ | |
1598 | int transport_generic_allocate_tasks( | |
1599 | struct se_cmd *cmd, | |
1600 | unsigned char *cdb) | |
1601 | { | |
1602 | int ret; | |
1603 | ||
1604 | transport_generic_prepare_cdb(cdb); | |
c66ac9db NB |
1605 | /* |
1606 | * Ensure that the received CDB is less than the max (252 + 8) bytes | |
1607 | * for VARIABLE_LENGTH_CMD | |
1608 | */ | |
1609 | if (scsi_command_size(cdb) > SCSI_MAX_VARLEN_CDB_SIZE) { | |
6708bb27 | 1610 | pr_err("Received SCSI CDB with command_size: %d that" |
c66ac9db NB |
1611 | " exceeds SCSI_MAX_VARLEN_CDB_SIZE: %d\n", |
1612 | scsi_command_size(cdb), SCSI_MAX_VARLEN_CDB_SIZE); | |
e3d6f909 | 1613 | return -EINVAL; |
c66ac9db NB |
1614 | } |
1615 | /* | |
1616 | * If the received CDB is larger than TCM_MAX_COMMAND_SIZE, | |
1617 | * allocate the additional extended CDB buffer now.. Otherwise | |
1618 | * setup the pointer from __t_task_cdb to t_task_cdb. | |
1619 | */ | |
a1d8b49a AG |
1620 | if (scsi_command_size(cdb) > sizeof(cmd->__t_task_cdb)) { |
1621 | cmd->t_task_cdb = kzalloc(scsi_command_size(cdb), | |
c66ac9db | 1622 | GFP_KERNEL); |
6708bb27 AG |
1623 | if (!cmd->t_task_cdb) { |
1624 | pr_err("Unable to allocate cmd->t_task_cdb" | |
a1d8b49a | 1625 | " %u > sizeof(cmd->__t_task_cdb): %lu ops\n", |
c66ac9db | 1626 | scsi_command_size(cdb), |
a1d8b49a | 1627 | (unsigned long)sizeof(cmd->__t_task_cdb)); |
e3d6f909 | 1628 | return -ENOMEM; |
c66ac9db NB |
1629 | } |
1630 | } else | |
a1d8b49a | 1631 | cmd->t_task_cdb = &cmd->__t_task_cdb[0]; |
c66ac9db | 1632 | /* |
a1d8b49a | 1633 | * Copy the original CDB into cmd-> |
c66ac9db | 1634 | */ |
a1d8b49a | 1635 | memcpy(cmd->t_task_cdb, cdb, scsi_command_size(cdb)); |
c66ac9db NB |
1636 | /* |
1637 | * Setup the received CDB based on SCSI defined opcodes and | |
1638 | * perform unit attention, persistent reservations and ALUA | |
a1d8b49a | 1639 | * checks for virtual device backends. The cmd->t_task_cdb |
c66ac9db NB |
1640 | * pointer is expected to be setup before we reach this point. |
1641 | */ | |
1642 | ret = transport_generic_cmd_sequencer(cmd, cdb); | |
1643 | if (ret < 0) | |
1644 | return ret; | |
1645 | /* | |
1646 | * Check for SAM Task Attribute Emulation | |
1647 | */ | |
1648 | if (transport_check_alloc_task_attr(cmd) < 0) { | |
1649 | cmd->se_cmd_flags |= SCF_SCSI_CDB_EXCEPTION; | |
1650 | cmd->scsi_sense_reason = TCM_INVALID_CDB_FIELD; | |
5951146d | 1651 | return -EINVAL; |
c66ac9db NB |
1652 | } |
1653 | spin_lock(&cmd->se_lun->lun_sep_lock); | |
1654 | if (cmd->se_lun->lun_sep) | |
1655 | cmd->se_lun->lun_sep->sep_stats.cmd_pdus++; | |
1656 | spin_unlock(&cmd->se_lun->lun_sep_lock); | |
1657 | return 0; | |
1658 | } | |
1659 | EXPORT_SYMBOL(transport_generic_allocate_tasks); | |
1660 | ||
dd8ae59d NB |
1661 | static void transport_generic_request_failure(struct se_cmd *, |
1662 | struct se_device *, int, int); | |
695434e1 NB |
1663 | /* |
1664 | * Used by fabric module frontends to queue tasks directly. | |
1665 | * Many only be used from process context only | |
1666 | */ | |
1667 | int transport_handle_cdb_direct( | |
1668 | struct se_cmd *cmd) | |
1669 | { | |
dd8ae59d NB |
1670 | int ret; |
1671 | ||
695434e1 NB |
1672 | if (!cmd->se_lun) { |
1673 | dump_stack(); | |
6708bb27 | 1674 | pr_err("cmd->se_lun is NULL\n"); |
695434e1 NB |
1675 | return -EINVAL; |
1676 | } | |
1677 | if (in_interrupt()) { | |
1678 | dump_stack(); | |
6708bb27 | 1679 | pr_err("transport_generic_handle_cdb cannot be called" |
695434e1 NB |
1680 | " from interrupt context\n"); |
1681 | return -EINVAL; | |
1682 | } | |
dd8ae59d NB |
1683 | /* |
1684 | * Set TRANSPORT_NEW_CMD state and cmd->t_transport_active=1 following | |
1685 | * transport_generic_handle_cdb*() -> transport_add_cmd_to_queue() | |
1686 | * in existing usage to ensure that outstanding descriptors are handled | |
d14921d6 | 1687 | * correctly during shutdown via transport_wait_for_tasks() |
dd8ae59d NB |
1688 | * |
1689 | * Also, we don't take cmd->t_state_lock here as we only expect | |
1690 | * this to be called for initial descriptor submission. | |
1691 | */ | |
1692 | cmd->t_state = TRANSPORT_NEW_CMD; | |
1693 | atomic_set(&cmd->t_transport_active, 1); | |
1694 | /* | |
1695 | * transport_generic_new_cmd() is already handling QUEUE_FULL, | |
1696 | * so follow TRANSPORT_NEW_CMD processing thread context usage | |
1697 | * and call transport_generic_request_failure() if necessary.. | |
1698 | */ | |
1699 | ret = transport_generic_new_cmd(cmd); | |
1700 | if (ret == -EAGAIN) | |
1701 | return 0; | |
1702 | else if (ret < 0) { | |
1703 | cmd->transport_error_status = ret; | |
1704 | transport_generic_request_failure(cmd, NULL, 0, | |
1705 | (cmd->data_direction != DMA_TO_DEVICE)); | |
1706 | } | |
1707 | return 0; | |
695434e1 NB |
1708 | } |
1709 | EXPORT_SYMBOL(transport_handle_cdb_direct); | |
1710 | ||
c66ac9db NB |
1711 | /* |
1712 | * Used by fabric module frontends defining a TFO->new_cmd_map() caller | |
1713 | * to queue up a newly setup se_cmd w/ TRANSPORT_NEW_CMD_MAP in order to | |
1714 | * complete setup in TCM process context w/ TFO->new_cmd_map(). | |
1715 | */ | |
1716 | int transport_generic_handle_cdb_map( | |
1717 | struct se_cmd *cmd) | |
1718 | { | |
e3d6f909 | 1719 | if (!cmd->se_lun) { |
c66ac9db | 1720 | dump_stack(); |
6708bb27 | 1721 | pr_err("cmd->se_lun is NULL\n"); |
e3d6f909 | 1722 | return -EINVAL; |
c66ac9db NB |
1723 | } |
1724 | ||
1725 | transport_add_cmd_to_queue(cmd, TRANSPORT_NEW_CMD_MAP); | |
1726 | return 0; | |
1727 | } | |
1728 | EXPORT_SYMBOL(transport_generic_handle_cdb_map); | |
1729 | ||
1730 | /* transport_generic_handle_data(): | |
1731 | * | |
1732 | * | |
1733 | */ | |
1734 | int transport_generic_handle_data( | |
1735 | struct se_cmd *cmd) | |
1736 | { | |
1737 | /* | |
1738 | * For the software fabric case, then we assume the nexus is being | |
1739 | * failed/shutdown when signals are pending from the kthread context | |
1740 | * caller, so we return a failure. For the HW target mode case running | |
1741 | * in interrupt code, the signal_pending() check is skipped. | |
1742 | */ | |
1743 | if (!in_interrupt() && signal_pending(current)) | |
e3d6f909 | 1744 | return -EPERM; |
c66ac9db NB |
1745 | /* |
1746 | * If the received CDB has aleady been ABORTED by the generic | |
1747 | * target engine, we now call transport_check_aborted_status() | |
1748 | * to queue any delated TASK_ABORTED status for the received CDB to the | |
25985edc | 1749 | * fabric module as we are expecting no further incoming DATA OUT |
c66ac9db NB |
1750 | * sequences at this point. |
1751 | */ | |
1752 | if (transport_check_aborted_status(cmd, 1) != 0) | |
1753 | return 0; | |
1754 | ||
1755 | transport_add_cmd_to_queue(cmd, TRANSPORT_PROCESS_WRITE); | |
1756 | return 0; | |
1757 | } | |
1758 | EXPORT_SYMBOL(transport_generic_handle_data); | |
1759 | ||
1760 | /* transport_generic_handle_tmr(): | |
1761 | * | |
1762 | * | |
1763 | */ | |
1764 | int transport_generic_handle_tmr( | |
1765 | struct se_cmd *cmd) | |
1766 | { | |
c66ac9db NB |
1767 | transport_add_cmd_to_queue(cmd, TRANSPORT_PROCESS_TMR); |
1768 | return 0; | |
1769 | } | |
1770 | EXPORT_SYMBOL(transport_generic_handle_tmr); | |
1771 | ||
f4366772 NB |
1772 | void transport_generic_free_cmd_intr( |
1773 | struct se_cmd *cmd) | |
1774 | { | |
1775 | transport_add_cmd_to_queue(cmd, TRANSPORT_FREE_CMD_INTR); | |
1776 | } | |
1777 | EXPORT_SYMBOL(transport_generic_free_cmd_intr); | |
1778 | ||
c66ac9db NB |
1779 | static int transport_stop_tasks_for_cmd(struct se_cmd *cmd) |
1780 | { | |
1781 | struct se_task *task, *task_tmp; | |
1782 | unsigned long flags; | |
1783 | int ret = 0; | |
1784 | ||
6708bb27 | 1785 | pr_debug("ITT[0x%08x] - Stopping tasks\n", |
e3d6f909 | 1786 | cmd->se_tfo->get_task_tag(cmd)); |
c66ac9db NB |
1787 | |
1788 | /* | |
1789 | * No tasks remain in the execution queue | |
1790 | */ | |
a1d8b49a | 1791 | spin_lock_irqsave(&cmd->t_state_lock, flags); |
c66ac9db | 1792 | list_for_each_entry_safe(task, task_tmp, |
a1d8b49a | 1793 | &cmd->t_task_list, t_list) { |
6708bb27 | 1794 | pr_debug("task_no[%d] - Processing task %p\n", |
c66ac9db NB |
1795 | task->task_no, task); |
1796 | /* | |
1797 | * If the struct se_task has not been sent and is not active, | |
1798 | * remove the struct se_task from the execution queue. | |
1799 | */ | |
1800 | if (!atomic_read(&task->task_sent) && | |
1801 | !atomic_read(&task->task_active)) { | |
a1d8b49a | 1802 | spin_unlock_irqrestore(&cmd->t_state_lock, |
c66ac9db NB |
1803 | flags); |
1804 | transport_remove_task_from_execute_queue(task, | |
1805 | task->se_dev); | |
1806 | ||
6708bb27 | 1807 | pr_debug("task_no[%d] - Removed from execute queue\n", |
c66ac9db | 1808 | task->task_no); |
a1d8b49a | 1809 | spin_lock_irqsave(&cmd->t_state_lock, flags); |
c66ac9db NB |
1810 | continue; |
1811 | } | |
1812 | ||
1813 | /* | |
1814 | * If the struct se_task is active, sleep until it is returned | |
1815 | * from the plugin. | |
1816 | */ | |
1817 | if (atomic_read(&task->task_active)) { | |
1818 | atomic_set(&task->task_stop, 1); | |
a1d8b49a | 1819 | spin_unlock_irqrestore(&cmd->t_state_lock, |
c66ac9db NB |
1820 | flags); |
1821 | ||
6708bb27 | 1822 | pr_debug("task_no[%d] - Waiting to complete\n", |
c66ac9db NB |
1823 | task->task_no); |
1824 | wait_for_completion(&task->task_stop_comp); | |
6708bb27 | 1825 | pr_debug("task_no[%d] - Stopped successfully\n", |
c66ac9db NB |
1826 | task->task_no); |
1827 | ||
a1d8b49a AG |
1828 | spin_lock_irqsave(&cmd->t_state_lock, flags); |
1829 | atomic_dec(&cmd->t_task_cdbs_left); | |
c66ac9db NB |
1830 | |
1831 | atomic_set(&task->task_active, 0); | |
1832 | atomic_set(&task->task_stop, 0); | |
1833 | } else { | |
6708bb27 | 1834 | pr_debug("task_no[%d] - Did nothing\n", task->task_no); |
c66ac9db NB |
1835 | ret++; |
1836 | } | |
1837 | ||
1838 | __transport_stop_task_timer(task, &flags); | |
1839 | } | |
a1d8b49a | 1840 | spin_unlock_irqrestore(&cmd->t_state_lock, flags); |
c66ac9db NB |
1841 | |
1842 | return ret; | |
1843 | } | |
1844 | ||
c66ac9db NB |
1845 | /* |
1846 | * Handle SAM-esque emulation for generic transport request failures. | |
1847 | */ | |
1848 | static void transport_generic_request_failure( | |
1849 | struct se_cmd *cmd, | |
1850 | struct se_device *dev, | |
1851 | int complete, | |
1852 | int sc) | |
1853 | { | |
07bde79a NB |
1854 | int ret = 0; |
1855 | ||
6708bb27 | 1856 | pr_debug("-----[ Storage Engine Exception for cmd: %p ITT: 0x%08x" |
e3d6f909 | 1857 | " CDB: 0x%02x\n", cmd, cmd->se_tfo->get_task_tag(cmd), |
a1d8b49a | 1858 | cmd->t_task_cdb[0]); |
6708bb27 | 1859 | pr_debug("-----[ i_state: %d t_state/def_t_state:" |
c66ac9db | 1860 | " %d/%d transport_error_status: %d\n", |
e3d6f909 | 1861 | cmd->se_tfo->get_cmd_state(cmd), |
c66ac9db NB |
1862 | cmd->t_state, cmd->deferred_t_state, |
1863 | cmd->transport_error_status); | |
6708bb27 | 1864 | pr_debug("-----[ t_tasks: %d t_task_cdbs_left: %d" |
c66ac9db NB |
1865 | " t_task_cdbs_sent: %d t_task_cdbs_ex_left: %d --" |
1866 | " t_transport_active: %d t_transport_stop: %d" | |
6708bb27 | 1867 | " t_transport_sent: %d\n", cmd->t_task_list_num, |
a1d8b49a AG |
1868 | atomic_read(&cmd->t_task_cdbs_left), |
1869 | atomic_read(&cmd->t_task_cdbs_sent), | |
1870 | atomic_read(&cmd->t_task_cdbs_ex_left), | |
1871 | atomic_read(&cmd->t_transport_active), | |
1872 | atomic_read(&cmd->t_transport_stop), | |
1873 | atomic_read(&cmd->t_transport_sent)); | |
c66ac9db NB |
1874 | |
1875 | transport_stop_all_task_timers(cmd); | |
1876 | ||
1877 | if (dev) | |
e3d6f909 | 1878 | atomic_inc(&dev->depth_left); |
c66ac9db NB |
1879 | /* |
1880 | * For SAM Task Attribute emulation for failed struct se_cmd | |
1881 | */ | |
1882 | if (cmd->se_dev->dev_task_attr_type == SAM_TASK_ATTR_EMULATED) | |
1883 | transport_complete_task_attr(cmd); | |
1884 | ||
1885 | if (complete) { | |
1886 | transport_direct_request_timeout(cmd); | |
1887 | cmd->transport_error_status = PYX_TRANSPORT_LU_COMM_FAILURE; | |
1888 | } | |
1889 | ||
1890 | switch (cmd->transport_error_status) { | |
1891 | case PYX_TRANSPORT_UNKNOWN_SAM_OPCODE: | |
1892 | cmd->scsi_sense_reason = TCM_UNSUPPORTED_SCSI_OPCODE; | |
1893 | break; | |
1894 | case PYX_TRANSPORT_REQ_TOO_MANY_SECTORS: | |
1895 | cmd->scsi_sense_reason = TCM_SECTOR_COUNT_TOO_MANY; | |
1896 | break; | |
1897 | case PYX_TRANSPORT_INVALID_CDB_FIELD: | |
1898 | cmd->scsi_sense_reason = TCM_INVALID_CDB_FIELD; | |
1899 | break; | |
1900 | case PYX_TRANSPORT_INVALID_PARAMETER_LIST: | |
1901 | cmd->scsi_sense_reason = TCM_INVALID_PARAMETER_LIST; | |
1902 | break; | |
1903 | case PYX_TRANSPORT_OUT_OF_MEMORY_RESOURCES: | |
1904 | if (!sc) | |
1905 | transport_new_cmd_failure(cmd); | |
1906 | /* | |
1907 | * Currently for PYX_TRANSPORT_OUT_OF_MEMORY_RESOURCES, | |
1908 | * we force this session to fall back to session | |
1909 | * recovery. | |
1910 | */ | |
e3d6f909 AG |
1911 | cmd->se_tfo->fall_back_to_erl0(cmd->se_sess); |
1912 | cmd->se_tfo->stop_session(cmd->se_sess, 0, 0); | |
c66ac9db NB |
1913 | |
1914 | goto check_stop; | |
1915 | case PYX_TRANSPORT_LU_COMM_FAILURE: | |
1916 | case PYX_TRANSPORT_ILLEGAL_REQUEST: | |
1917 | cmd->scsi_sense_reason = TCM_LOGICAL_UNIT_COMMUNICATION_FAILURE; | |
1918 | break; | |
1919 | case PYX_TRANSPORT_UNKNOWN_MODE_PAGE: | |
1920 | cmd->scsi_sense_reason = TCM_UNKNOWN_MODE_PAGE; | |
1921 | break; | |
1922 | case PYX_TRANSPORT_WRITE_PROTECTED: | |
1923 | cmd->scsi_sense_reason = TCM_WRITE_PROTECTED; | |
1924 | break; | |
1925 | case PYX_TRANSPORT_RESERVATION_CONFLICT: | |
1926 | /* | |
1927 | * No SENSE Data payload for this case, set SCSI Status | |
1928 | * and queue the response to $FABRIC_MOD. | |
1929 | * | |
1930 | * Uses linux/include/scsi/scsi.h SAM status codes defs | |
1931 | */ | |
1932 | cmd->scsi_status = SAM_STAT_RESERVATION_CONFLICT; | |
1933 | /* | |
1934 | * For UA Interlock Code 11b, a RESERVATION CONFLICT will | |
1935 | * establish a UNIT ATTENTION with PREVIOUS RESERVATION | |
1936 | * CONFLICT STATUS. | |
1937 | * | |
1938 | * See spc4r17, section 7.4.6 Control Mode Page, Table 349 | |
1939 | */ | |
e3d6f909 AG |
1940 | if (cmd->se_sess && |
1941 | cmd->se_dev->se_sub_dev->se_dev_attrib.emulate_ua_intlck_ctrl == 2) | |
1942 | core_scsi3_ua_allocate(cmd->se_sess->se_node_acl, | |
c66ac9db NB |
1943 | cmd->orig_fe_lun, 0x2C, |
1944 | ASCQ_2CH_PREVIOUS_RESERVATION_CONFLICT_STATUS); | |
1945 | ||
07bde79a NB |
1946 | ret = cmd->se_tfo->queue_status(cmd); |
1947 | if (ret == -EAGAIN) | |
1948 | goto queue_full; | |
c66ac9db NB |
1949 | goto check_stop; |
1950 | case PYX_TRANSPORT_USE_SENSE_REASON: | |
1951 | /* | |
1952 | * struct se_cmd->scsi_sense_reason already set | |
1953 | */ | |
1954 | break; | |
1955 | default: | |
6708bb27 | 1956 | pr_err("Unknown transport error for CDB 0x%02x: %d\n", |
a1d8b49a | 1957 | cmd->t_task_cdb[0], |
c66ac9db NB |
1958 | cmd->transport_error_status); |
1959 | cmd->scsi_sense_reason = TCM_UNSUPPORTED_SCSI_OPCODE; | |
1960 | break; | |
1961 | } | |
16ab8e60 NB |
1962 | /* |
1963 | * If a fabric does not define a cmd->se_tfo->new_cmd_map caller, | |
1964 | * make the call to transport_send_check_condition_and_sense() | |
1965 | * directly. Otherwise expect the fabric to make the call to | |
1966 | * transport_send_check_condition_and_sense() after handling | |
1967 | * possible unsoliticied write data payloads. | |
1968 | */ | |
1969 | if (!sc && !cmd->se_tfo->new_cmd_map) | |
c66ac9db | 1970 | transport_new_cmd_failure(cmd); |
07bde79a NB |
1971 | else { |
1972 | ret = transport_send_check_condition_and_sense(cmd, | |
1973 | cmd->scsi_sense_reason, 0); | |
1974 | if (ret == -EAGAIN) | |
1975 | goto queue_full; | |
1976 | } | |
1977 | ||
c66ac9db NB |
1978 | check_stop: |
1979 | transport_lun_remove_cmd(cmd); | |
6708bb27 | 1980 | if (!transport_cmd_check_stop_to_fabric(cmd)) |
c66ac9db | 1981 | ; |
07bde79a NB |
1982 | return; |
1983 | ||
1984 | queue_full: | |
1985 | cmd->t_state = TRANSPORT_COMPLETE_OK; | |
1986 | transport_handle_queue_full(cmd, cmd->se_dev, transport_complete_qf); | |
c66ac9db NB |
1987 | } |
1988 | ||
1989 | static void transport_direct_request_timeout(struct se_cmd *cmd) | |
1990 | { | |
1991 | unsigned long flags; | |
1992 | ||
a1d8b49a | 1993 | spin_lock_irqsave(&cmd->t_state_lock, flags); |
6708bb27 | 1994 | if (!atomic_read(&cmd->t_transport_timeout)) { |
a1d8b49a | 1995 | spin_unlock_irqrestore(&cmd->t_state_lock, flags); |
c66ac9db NB |
1996 | return; |
1997 | } | |
a1d8b49a AG |
1998 | if (atomic_read(&cmd->t_task_cdbs_timeout_left)) { |
1999 | spin_unlock_irqrestore(&cmd->t_state_lock, flags); | |
c66ac9db NB |
2000 | return; |
2001 | } | |
2002 | ||
a1d8b49a AG |
2003 | atomic_sub(atomic_read(&cmd->t_transport_timeout), |
2004 | &cmd->t_se_count); | |
2005 | spin_unlock_irqrestore(&cmd->t_state_lock, flags); | |
c66ac9db NB |
2006 | } |
2007 | ||
2008 | static void transport_generic_request_timeout(struct se_cmd *cmd) | |
2009 | { | |
2010 | unsigned long flags; | |
2011 | ||
2012 | /* | |
e6a2573f | 2013 | * Reset cmd->t_se_count to allow transport_put_cmd() |
c66ac9db NB |
2014 | * to allow last call to free memory resources. |
2015 | */ | |
a1d8b49a AG |
2016 | spin_lock_irqsave(&cmd->t_state_lock, flags); |
2017 | if (atomic_read(&cmd->t_transport_timeout) > 1) { | |
2018 | int tmp = (atomic_read(&cmd->t_transport_timeout) - 1); | |
c66ac9db | 2019 | |
a1d8b49a | 2020 | atomic_sub(tmp, &cmd->t_se_count); |
c66ac9db | 2021 | } |
a1d8b49a | 2022 | spin_unlock_irqrestore(&cmd->t_state_lock, flags); |
c66ac9db | 2023 | |
e6a2573f | 2024 | transport_put_cmd(cmd); |
c66ac9db NB |
2025 | } |
2026 | ||
c66ac9db NB |
2027 | static inline u32 transport_lba_21(unsigned char *cdb) |
2028 | { | |
2029 | return ((cdb[1] & 0x1f) << 16) | (cdb[2] << 8) | cdb[3]; | |
2030 | } | |
2031 | ||
2032 | static inline u32 transport_lba_32(unsigned char *cdb) | |
2033 | { | |
2034 | return (cdb[2] << 24) | (cdb[3] << 16) | (cdb[4] << 8) | cdb[5]; | |
2035 | } | |
2036 | ||
2037 | static inline unsigned long long transport_lba_64(unsigned char *cdb) | |
2038 | { | |
2039 | unsigned int __v1, __v2; | |
2040 | ||
2041 | __v1 = (cdb[2] << 24) | (cdb[3] << 16) | (cdb[4] << 8) | cdb[5]; | |
2042 | __v2 = (cdb[6] << 24) | (cdb[7] << 16) | (cdb[8] << 8) | cdb[9]; | |
2043 | ||
2044 | return ((unsigned long long)__v2) | (unsigned long long)__v1 << 32; | |
2045 | } | |
2046 | ||
2047 | /* | |
2048 | * For VARIABLE_LENGTH_CDB w/ 32 byte extended CDBs | |
2049 | */ | |
2050 | static inline unsigned long long transport_lba_64_ext(unsigned char *cdb) | |
2051 | { | |
2052 | unsigned int __v1, __v2; | |
2053 | ||
2054 | __v1 = (cdb[12] << 24) | (cdb[13] << 16) | (cdb[14] << 8) | cdb[15]; | |
2055 | __v2 = (cdb[16] << 24) | (cdb[17] << 16) | (cdb[18] << 8) | cdb[19]; | |
2056 | ||
2057 | return ((unsigned long long)__v2) | (unsigned long long)__v1 << 32; | |
2058 | } | |
2059 | ||
2060 | static void transport_set_supported_SAM_opcode(struct se_cmd *se_cmd) | |
2061 | { | |
2062 | unsigned long flags; | |
2063 | ||
a1d8b49a | 2064 | spin_lock_irqsave(&se_cmd->t_state_lock, flags); |
c66ac9db | 2065 | se_cmd->se_cmd_flags |= SCF_SUPPORTED_SAM_OPCODE; |
a1d8b49a | 2066 | spin_unlock_irqrestore(&se_cmd->t_state_lock, flags); |
c66ac9db NB |
2067 | } |
2068 | ||
2069 | /* | |
2070 | * Called from interrupt context. | |
2071 | */ | |
2072 | static void transport_task_timeout_handler(unsigned long data) | |
2073 | { | |
2074 | struct se_task *task = (struct se_task *)data; | |
e3d6f909 | 2075 | struct se_cmd *cmd = task->task_se_cmd; |
c66ac9db NB |
2076 | unsigned long flags; |
2077 | ||
6708bb27 | 2078 | pr_debug("transport task timeout fired! task: %p cmd: %p\n", task, cmd); |
c66ac9db | 2079 | |
a1d8b49a | 2080 | spin_lock_irqsave(&cmd->t_state_lock, flags); |
c66ac9db | 2081 | if (task->task_flags & TF_STOP) { |
a1d8b49a | 2082 | spin_unlock_irqrestore(&cmd->t_state_lock, flags); |
c66ac9db NB |
2083 | return; |
2084 | } | |
2085 | task->task_flags &= ~TF_RUNNING; | |
2086 | ||
2087 | /* | |
2088 | * Determine if transport_complete_task() has already been called. | |
2089 | */ | |
6708bb27 AG |
2090 | if (!atomic_read(&task->task_active)) { |
2091 | pr_debug("transport task: %p cmd: %p timeout task_active" | |
c66ac9db | 2092 | " == 0\n", task, cmd); |
a1d8b49a | 2093 | spin_unlock_irqrestore(&cmd->t_state_lock, flags); |
c66ac9db NB |
2094 | return; |
2095 | } | |
2096 | ||
a1d8b49a AG |
2097 | atomic_inc(&cmd->t_se_count); |
2098 | atomic_inc(&cmd->t_transport_timeout); | |
2099 | cmd->t_tasks_failed = 1; | |
c66ac9db NB |
2100 | |
2101 | atomic_set(&task->task_timeout, 1); | |
2102 | task->task_error_status = PYX_TRANSPORT_TASK_TIMEOUT; | |
2103 | task->task_scsi_status = 1; | |
2104 | ||
2105 | if (atomic_read(&task->task_stop)) { | |
6708bb27 | 2106 | pr_debug("transport task: %p cmd: %p timeout task_stop" |
c66ac9db | 2107 | " == 1\n", task, cmd); |
a1d8b49a | 2108 | spin_unlock_irqrestore(&cmd->t_state_lock, flags); |
c66ac9db NB |
2109 | complete(&task->task_stop_comp); |
2110 | return; | |
2111 | } | |
2112 | ||
6708bb27 AG |
2113 | if (!atomic_dec_and_test(&cmd->t_task_cdbs_left)) { |
2114 | pr_debug("transport task: %p cmd: %p timeout non zero" | |
c66ac9db | 2115 | " t_task_cdbs_left\n", task, cmd); |
a1d8b49a | 2116 | spin_unlock_irqrestore(&cmd->t_state_lock, flags); |
c66ac9db NB |
2117 | return; |
2118 | } | |
6708bb27 | 2119 | pr_debug("transport task: %p cmd: %p timeout ZERO t_task_cdbs_left\n", |
c66ac9db NB |
2120 | task, cmd); |
2121 | ||
2122 | cmd->t_state = TRANSPORT_COMPLETE_FAILURE; | |
a1d8b49a | 2123 | spin_unlock_irqrestore(&cmd->t_state_lock, flags); |
c66ac9db NB |
2124 | |
2125 | transport_add_cmd_to_queue(cmd, TRANSPORT_COMPLETE_FAILURE); | |
2126 | } | |
2127 | ||
2128 | /* | |
a1d8b49a | 2129 | * Called with cmd->t_state_lock held. |
c66ac9db NB |
2130 | */ |
2131 | static void transport_start_task_timer(struct se_task *task) | |
2132 | { | |
2133 | struct se_device *dev = task->se_dev; | |
2134 | int timeout; | |
2135 | ||
2136 | if (task->task_flags & TF_RUNNING) | |
2137 | return; | |
2138 | /* | |
2139 | * If the task_timeout is disabled, exit now. | |
2140 | */ | |
e3d6f909 | 2141 | timeout = dev->se_sub_dev->se_dev_attrib.task_timeout; |
6708bb27 | 2142 | if (!timeout) |
c66ac9db NB |
2143 | return; |
2144 | ||
2145 | init_timer(&task->task_timer); | |
2146 | task->task_timer.expires = (get_jiffies_64() + timeout * HZ); | |
2147 | task->task_timer.data = (unsigned long) task; | |
2148 | task->task_timer.function = transport_task_timeout_handler; | |
2149 | ||
2150 | task->task_flags |= TF_RUNNING; | |
2151 | add_timer(&task->task_timer); | |
2152 | #if 0 | |
6708bb27 | 2153 | pr_debug("Starting task timer for cmd: %p task: %p seconds:" |
c66ac9db NB |
2154 | " %d\n", task->task_se_cmd, task, timeout); |
2155 | #endif | |
2156 | } | |
2157 | ||
2158 | /* | |
a1d8b49a | 2159 | * Called with spin_lock_irq(&cmd->t_state_lock) held. |
c66ac9db NB |
2160 | */ |
2161 | void __transport_stop_task_timer(struct se_task *task, unsigned long *flags) | |
2162 | { | |
e3d6f909 | 2163 | struct se_cmd *cmd = task->task_se_cmd; |
c66ac9db | 2164 | |
6708bb27 | 2165 | if (!task->task_flags & TF_RUNNING) |
c66ac9db NB |
2166 | return; |
2167 | ||
2168 | task->task_flags |= TF_STOP; | |
a1d8b49a | 2169 | spin_unlock_irqrestore(&cmd->t_state_lock, *flags); |
c66ac9db NB |
2170 | |
2171 | del_timer_sync(&task->task_timer); | |
2172 | ||
a1d8b49a | 2173 | spin_lock_irqsave(&cmd->t_state_lock, *flags); |
c66ac9db NB |
2174 | task->task_flags &= ~TF_RUNNING; |
2175 | task->task_flags &= ~TF_STOP; | |
2176 | } | |
2177 | ||
2178 | static void transport_stop_all_task_timers(struct se_cmd *cmd) | |
2179 | { | |
2180 | struct se_task *task = NULL, *task_tmp; | |
2181 | unsigned long flags; | |
2182 | ||
a1d8b49a | 2183 | spin_lock_irqsave(&cmd->t_state_lock, flags); |
c66ac9db | 2184 | list_for_each_entry_safe(task, task_tmp, |
a1d8b49a | 2185 | &cmd->t_task_list, t_list) |
c66ac9db | 2186 | __transport_stop_task_timer(task, &flags); |
a1d8b49a | 2187 | spin_unlock_irqrestore(&cmd->t_state_lock, flags); |
c66ac9db NB |
2188 | } |
2189 | ||
2190 | static inline int transport_tcq_window_closed(struct se_device *dev) | |
2191 | { | |
2192 | if (dev->dev_tcq_window_closed++ < | |
2193 | PYX_TRANSPORT_WINDOW_CLOSED_THRESHOLD) { | |
2194 | msleep(PYX_TRANSPORT_WINDOW_CLOSED_WAIT_SHORT); | |
2195 | } else | |
2196 | msleep(PYX_TRANSPORT_WINDOW_CLOSED_WAIT_LONG); | |
2197 | ||
e3d6f909 | 2198 | wake_up_interruptible(&dev->dev_queue_obj.thread_wq); |
c66ac9db NB |
2199 | return 0; |
2200 | } | |
2201 | ||
2202 | /* | |
2203 | * Called from Fabric Module context from transport_execute_tasks() | |
2204 | * | |
2205 | * The return of this function determins if the tasks from struct se_cmd | |
2206 | * get added to the execution queue in transport_execute_tasks(), | |
2207 | * or are added to the delayed or ordered lists here. | |
2208 | */ | |
2209 | static inline int transport_execute_task_attr(struct se_cmd *cmd) | |
2210 | { | |
5951146d | 2211 | if (cmd->se_dev->dev_task_attr_type != SAM_TASK_ATTR_EMULATED) |
c66ac9db NB |
2212 | return 1; |
2213 | /* | |
25985edc | 2214 | * Check for the existence of HEAD_OF_QUEUE, and if true return 1 |
c66ac9db NB |
2215 | * to allow the passed struct se_cmd list of tasks to the front of the list. |
2216 | */ | |
e66ecd50 | 2217 | if (cmd->sam_task_attr == MSG_HEAD_TAG) { |
5951146d | 2218 | atomic_inc(&cmd->se_dev->dev_hoq_count); |
c66ac9db | 2219 | smp_mb__after_atomic_inc(); |
6708bb27 | 2220 | pr_debug("Added HEAD_OF_QUEUE for CDB:" |
c66ac9db | 2221 | " 0x%02x, se_ordered_id: %u\n", |
6708bb27 | 2222 | cmd->t_task_cdb[0], |
c66ac9db NB |
2223 | cmd->se_ordered_id); |
2224 | return 1; | |
e66ecd50 | 2225 | } else if (cmd->sam_task_attr == MSG_ORDERED_TAG) { |
5951146d AG |
2226 | spin_lock(&cmd->se_dev->ordered_cmd_lock); |
2227 | list_add_tail(&cmd->se_ordered_node, | |
2228 | &cmd->se_dev->ordered_cmd_list); | |
2229 | spin_unlock(&cmd->se_dev->ordered_cmd_lock); | |
c66ac9db | 2230 | |
5951146d | 2231 | atomic_inc(&cmd->se_dev->dev_ordered_sync); |
c66ac9db NB |
2232 | smp_mb__after_atomic_inc(); |
2233 | ||
6708bb27 | 2234 | pr_debug("Added ORDERED for CDB: 0x%02x to ordered" |
c66ac9db | 2235 | " list, se_ordered_id: %u\n", |
a1d8b49a | 2236 | cmd->t_task_cdb[0], |
c66ac9db NB |
2237 | cmd->se_ordered_id); |
2238 | /* | |
2239 | * Add ORDERED command to tail of execution queue if | |
2240 | * no other older commands exist that need to be | |
2241 | * completed first. | |
2242 | */ | |
6708bb27 | 2243 | if (!atomic_read(&cmd->se_dev->simple_cmds)) |
c66ac9db NB |
2244 | return 1; |
2245 | } else { | |
2246 | /* | |
2247 | * For SIMPLE and UNTAGGED Task Attribute commands | |
2248 | */ | |
5951146d | 2249 | atomic_inc(&cmd->se_dev->simple_cmds); |
c66ac9db NB |
2250 | smp_mb__after_atomic_inc(); |
2251 | } | |
2252 | /* | |
2253 | * Otherwise if one or more outstanding ORDERED task attribute exist, | |
2254 | * add the dormant task(s) built for the passed struct se_cmd to the | |
2255 | * execution queue and become in Active state for this struct se_device. | |
2256 | */ | |
5951146d | 2257 | if (atomic_read(&cmd->se_dev->dev_ordered_sync) != 0) { |
c66ac9db NB |
2258 | /* |
2259 | * Otherwise, add cmd w/ tasks to delayed cmd queue that | |
25985edc | 2260 | * will be drained upon completion of HEAD_OF_QUEUE task. |
c66ac9db | 2261 | */ |
5951146d | 2262 | spin_lock(&cmd->se_dev->delayed_cmd_lock); |
c66ac9db | 2263 | cmd->se_cmd_flags |= SCF_DELAYED_CMD_FROM_SAM_ATTR; |
5951146d AG |
2264 | list_add_tail(&cmd->se_delayed_node, |
2265 | &cmd->se_dev->delayed_cmd_list); | |
2266 | spin_unlock(&cmd->se_dev->delayed_cmd_lock); | |
c66ac9db | 2267 | |
6708bb27 | 2268 | pr_debug("Added CDB: 0x%02x Task Attr: 0x%02x to" |
c66ac9db | 2269 | " delayed CMD list, se_ordered_id: %u\n", |
a1d8b49a | 2270 | cmd->t_task_cdb[0], cmd->sam_task_attr, |
c66ac9db NB |
2271 | cmd->se_ordered_id); |
2272 | /* | |
2273 | * Return zero to let transport_execute_tasks() know | |
2274 | * not to add the delayed tasks to the execution list. | |
2275 | */ | |
2276 | return 0; | |
2277 | } | |
2278 | /* | |
2279 | * Otherwise, no ORDERED task attributes exist.. | |
2280 | */ | |
2281 | return 1; | |
2282 | } | |
2283 | ||
2284 | /* | |
2285 | * Called from fabric module context in transport_generic_new_cmd() and | |
2286 | * transport_generic_process_write() | |
2287 | */ | |
2288 | static int transport_execute_tasks(struct se_cmd *cmd) | |
2289 | { | |
2290 | int add_tasks; | |
2291 | ||
db1620a2 CH |
2292 | if (se_dev_check_online(cmd->se_orig_obj_ptr) != 0) { |
2293 | cmd->transport_error_status = PYX_TRANSPORT_LU_COMM_FAILURE; | |
2294 | transport_generic_request_failure(cmd, NULL, 0, 1); | |
2295 | return 0; | |
c66ac9db | 2296 | } |
db1620a2 | 2297 | |
c66ac9db NB |
2298 | /* |
2299 | * Call transport_cmd_check_stop() to see if a fabric exception | |
25985edc | 2300 | * has occurred that prevents execution. |
c66ac9db | 2301 | */ |
6708bb27 | 2302 | if (!transport_cmd_check_stop(cmd, 0, TRANSPORT_PROCESSING)) { |
c66ac9db NB |
2303 | /* |
2304 | * Check for SAM Task Attribute emulation and HEAD_OF_QUEUE | |
2305 | * attribute for the tasks of the received struct se_cmd CDB | |
2306 | */ | |
2307 | add_tasks = transport_execute_task_attr(cmd); | |
e3d6f909 | 2308 | if (!add_tasks) |
c66ac9db NB |
2309 | goto execute_tasks; |
2310 | /* | |
2311 | * This calls transport_add_tasks_from_cmd() to handle | |
2312 | * HEAD_OF_QUEUE ordering for SAM Task Attribute emulation | |
2313 | * (if enabled) in __transport_add_task_to_execute_queue() and | |
2314 | * transport_add_task_check_sam_attr(). | |
2315 | */ | |
2316 | transport_add_tasks_from_cmd(cmd); | |
2317 | } | |
2318 | /* | |
2319 | * Kick the execution queue for the cmd associated struct se_device | |
2320 | * storage object. | |
2321 | */ | |
2322 | execute_tasks: | |
5951146d | 2323 | __transport_execute_tasks(cmd->se_dev); |
c66ac9db NB |
2324 | return 0; |
2325 | } | |
2326 | ||
2327 | /* | |
2328 | * Called to check struct se_device tcq depth window, and once open pull struct se_task | |
2329 | * from struct se_device->execute_task_list and | |
2330 | * | |
2331 | * Called from transport_processing_thread() | |
2332 | */ | |
2333 | static int __transport_execute_tasks(struct se_device *dev) | |
2334 | { | |
2335 | int error; | |
2336 | struct se_cmd *cmd = NULL; | |
e3d6f909 | 2337 | struct se_task *task = NULL; |
c66ac9db NB |
2338 | unsigned long flags; |
2339 | ||
2340 | /* | |
2341 | * Check if there is enough room in the device and HBA queue to send | |
a1d8b49a | 2342 | * struct se_tasks to the selected transport. |
c66ac9db NB |
2343 | */ |
2344 | check_depth: | |
e3d6f909 | 2345 | if (!atomic_read(&dev->depth_left)) |
c66ac9db | 2346 | return transport_tcq_window_closed(dev); |
c66ac9db | 2347 | |
e3d6f909 | 2348 | dev->dev_tcq_window_closed = 0; |
c66ac9db | 2349 | |
e3d6f909 AG |
2350 | spin_lock_irq(&dev->execute_task_lock); |
2351 | if (list_empty(&dev->execute_task_list)) { | |
2352 | spin_unlock_irq(&dev->execute_task_lock); | |
c66ac9db NB |
2353 | return 0; |
2354 | } | |
e3d6f909 AG |
2355 | task = list_first_entry(&dev->execute_task_list, |
2356 | struct se_task, t_execute_list); | |
2357 | list_del(&task->t_execute_list); | |
2358 | atomic_set(&task->task_execute_queue, 0); | |
2359 | atomic_dec(&dev->execute_tasks); | |
2360 | spin_unlock_irq(&dev->execute_task_lock); | |
c66ac9db NB |
2361 | |
2362 | atomic_dec(&dev->depth_left); | |
c66ac9db | 2363 | |
e3d6f909 | 2364 | cmd = task->task_se_cmd; |
c66ac9db | 2365 | |
a1d8b49a | 2366 | spin_lock_irqsave(&cmd->t_state_lock, flags); |
c66ac9db NB |
2367 | atomic_set(&task->task_active, 1); |
2368 | atomic_set(&task->task_sent, 1); | |
a1d8b49a | 2369 | atomic_inc(&cmd->t_task_cdbs_sent); |
c66ac9db | 2370 | |
a1d8b49a AG |
2371 | if (atomic_read(&cmd->t_task_cdbs_sent) == |
2372 | cmd->t_task_list_num) | |
c66ac9db NB |
2373 | atomic_set(&cmd->transport_sent, 1); |
2374 | ||
2375 | transport_start_task_timer(task); | |
a1d8b49a | 2376 | spin_unlock_irqrestore(&cmd->t_state_lock, flags); |
c66ac9db NB |
2377 | /* |
2378 | * The struct se_cmd->transport_emulate_cdb() function pointer is used | |
e3d6f909 | 2379 | * to grab REPORT_LUNS and other CDBs we want to handle before they hit the |
c66ac9db NB |
2380 | * struct se_subsystem_api->do_task() caller below. |
2381 | */ | |
2382 | if (cmd->transport_emulate_cdb) { | |
2383 | error = cmd->transport_emulate_cdb(cmd); | |
2384 | if (error != 0) { | |
2385 | cmd->transport_error_status = error; | |
2386 | atomic_set(&task->task_active, 0); | |
2387 | atomic_set(&cmd->transport_sent, 0); | |
2388 | transport_stop_tasks_for_cmd(cmd); | |
2389 | transport_generic_request_failure(cmd, dev, 0, 1); | |
2390 | goto check_depth; | |
2391 | } | |
2392 | /* | |
2393 | * Handle the successful completion for transport_emulate_cdb() | |
2394 | * for synchronous operation, following SCF_EMULATE_CDB_ASYNC | |
2395 | * Otherwise the caller is expected to complete the task with | |
2396 | * proper status. | |
2397 | */ | |
2398 | if (!(cmd->se_cmd_flags & SCF_EMULATE_CDB_ASYNC)) { | |
2399 | cmd->scsi_status = SAM_STAT_GOOD; | |
2400 | task->task_scsi_status = GOOD; | |
2401 | transport_complete_task(task, 1); | |
2402 | } | |
2403 | } else { | |
2404 | /* | |
2405 | * Currently for all virtual TCM plugins including IBLOCK, FILEIO and | |
2406 | * RAMDISK we use the internal transport_emulate_control_cdb() logic | |
2407 | * with struct se_subsystem_api callers for the primary SPC-3 TYPE_DISK | |
2408 | * LUN emulation code. | |
2409 | * | |
2410 | * For TCM/pSCSI and all other SCF_SCSI_DATA_SG_IO_CDB I/O tasks we | |
2411 | * call ->do_task() directly and let the underlying TCM subsystem plugin | |
2412 | * code handle the CDB emulation. | |
2413 | */ | |
e3d6f909 AG |
2414 | if ((dev->transport->transport_type != TRANSPORT_PLUGIN_PHBA_PDEV) && |
2415 | (!(task->task_se_cmd->se_cmd_flags & SCF_SCSI_DATA_SG_IO_CDB))) | |
c66ac9db NB |
2416 | error = transport_emulate_control_cdb(task); |
2417 | else | |
e3d6f909 | 2418 | error = dev->transport->do_task(task); |
c66ac9db NB |
2419 | |
2420 | if (error != 0) { | |
2421 | cmd->transport_error_status = error; | |
2422 | atomic_set(&task->task_active, 0); | |
2423 | atomic_set(&cmd->transport_sent, 0); | |
2424 | transport_stop_tasks_for_cmd(cmd); | |
2425 | transport_generic_request_failure(cmd, dev, 0, 1); | |
2426 | } | |
2427 | } | |
2428 | ||
2429 | goto check_depth; | |
2430 | ||
2431 | return 0; | |
2432 | } | |
2433 | ||
2434 | void transport_new_cmd_failure(struct se_cmd *se_cmd) | |
2435 | { | |
2436 | unsigned long flags; | |
2437 | /* | |
2438 | * Any unsolicited data will get dumped for failed command inside of | |
2439 | * the fabric plugin | |
2440 | */ | |
a1d8b49a | 2441 | spin_lock_irqsave(&se_cmd->t_state_lock, flags); |
c66ac9db NB |
2442 | se_cmd->se_cmd_flags |= SCF_SE_CMD_FAILED; |
2443 | se_cmd->se_cmd_flags |= SCF_SCSI_CDB_EXCEPTION; | |
a1d8b49a | 2444 | spin_unlock_irqrestore(&se_cmd->t_state_lock, flags); |
c66ac9db NB |
2445 | } |
2446 | ||
c66ac9db NB |
2447 | static inline u32 transport_get_sectors_6( |
2448 | unsigned char *cdb, | |
2449 | struct se_cmd *cmd, | |
2450 | int *ret) | |
2451 | { | |
5951146d | 2452 | struct se_device *dev = cmd->se_dev; |
c66ac9db NB |
2453 | |
2454 | /* | |
2455 | * Assume TYPE_DISK for non struct se_device objects. | |
2456 | * Use 8-bit sector value. | |
2457 | */ | |
2458 | if (!dev) | |
2459 | goto type_disk; | |
2460 | ||
2461 | /* | |
2462 | * Use 24-bit allocation length for TYPE_TAPE. | |
2463 | */ | |
e3d6f909 | 2464 | if (dev->transport->get_device_type(dev) == TYPE_TAPE) |
c66ac9db NB |
2465 | return (u32)(cdb[2] << 16) + (cdb[3] << 8) + cdb[4]; |
2466 | ||
2467 | /* | |
2468 | * Everything else assume TYPE_DISK Sector CDB location. | |
2469 | * Use 8-bit sector value. | |
2470 | */ | |
2471 | type_disk: | |
2472 | return (u32)cdb[4]; | |
2473 | } | |
2474 | ||
2475 | static inline u32 transport_get_sectors_10( | |
2476 | unsigned char *cdb, | |
2477 | struct se_cmd *cmd, | |
2478 | int *ret) | |
2479 | { | |
5951146d | 2480 | struct se_device *dev = cmd->se_dev; |
c66ac9db NB |
2481 | |
2482 | /* | |
2483 | * Assume TYPE_DISK for non struct se_device objects. | |
2484 | * Use 16-bit sector value. | |
2485 | */ | |
2486 | if (!dev) | |
2487 | goto type_disk; | |
2488 | ||
2489 | /* | |
2490 | * XXX_10 is not defined in SSC, throw an exception | |
2491 | */ | |
e3d6f909 AG |
2492 | if (dev->transport->get_device_type(dev) == TYPE_TAPE) { |
2493 | *ret = -EINVAL; | |
c66ac9db NB |
2494 | return 0; |
2495 | } | |
2496 | ||
2497 | /* | |
2498 | * Everything else assume TYPE_DISK Sector CDB location. | |
2499 | * Use 16-bit sector value. | |
2500 | */ | |
2501 | type_disk: | |
2502 | return (u32)(cdb[7] << 8) + cdb[8]; | |
2503 | } | |
2504 | ||
2505 | static inline u32 transport_get_sectors_12( | |
2506 | unsigned char *cdb, | |
2507 | struct se_cmd *cmd, | |
2508 | int *ret) | |
2509 | { | |
5951146d | 2510 | struct se_device *dev = cmd->se_dev; |
c66ac9db NB |
2511 | |
2512 | /* | |
2513 | * Assume TYPE_DISK for non struct se_device objects. | |
2514 | * Use 32-bit sector value. | |
2515 | */ | |
2516 | if (!dev) | |
2517 | goto type_disk; | |
2518 | ||
2519 | /* | |
2520 | * XXX_12 is not defined in SSC, throw an exception | |
2521 | */ | |
e3d6f909 AG |
2522 | if (dev->transport->get_device_type(dev) == TYPE_TAPE) { |
2523 | *ret = -EINVAL; | |
c66ac9db NB |
2524 | return 0; |
2525 | } | |
2526 | ||
2527 | /* | |
2528 | * Everything else assume TYPE_DISK Sector CDB location. | |
2529 | * Use 32-bit sector value. | |
2530 | */ | |
2531 | type_disk: | |
2532 | return (u32)(cdb[6] << 24) + (cdb[7] << 16) + (cdb[8] << 8) + cdb[9]; | |
2533 | } | |
2534 | ||
2535 | static inline u32 transport_get_sectors_16( | |
2536 | unsigned char *cdb, | |
2537 | struct se_cmd *cmd, | |
2538 | int *ret) | |
2539 | { | |
5951146d | 2540 | struct se_device *dev = cmd->se_dev; |
c66ac9db NB |
2541 | |
2542 | /* | |
2543 | * Assume TYPE_DISK for non struct se_device objects. | |
2544 | * Use 32-bit sector value. | |
2545 | */ | |
2546 | if (!dev) | |
2547 | goto type_disk; | |
2548 | ||
2549 | /* | |
2550 | * Use 24-bit allocation length for TYPE_TAPE. | |
2551 | */ | |
e3d6f909 | 2552 | if (dev->transport->get_device_type(dev) == TYPE_TAPE) |
c66ac9db NB |
2553 | return (u32)(cdb[12] << 16) + (cdb[13] << 8) + cdb[14]; |
2554 | ||
2555 | type_disk: | |
2556 | return (u32)(cdb[10] << 24) + (cdb[11] << 16) + | |
2557 | (cdb[12] << 8) + cdb[13]; | |
2558 | } | |
2559 | ||
2560 | /* | |
2561 | * Used for VARIABLE_LENGTH_CDB WRITE_32 and READ_32 variants | |
2562 | */ | |
2563 | static inline u32 transport_get_sectors_32( | |
2564 | unsigned char *cdb, | |
2565 | struct se_cmd *cmd, | |
2566 | int *ret) | |
2567 | { | |
2568 | /* | |
2569 | * Assume TYPE_DISK for non struct se_device objects. | |
2570 | * Use 32-bit sector value. | |
2571 | */ | |
2572 | return (u32)(cdb[28] << 24) + (cdb[29] << 16) + | |
2573 | (cdb[30] << 8) + cdb[31]; | |
2574 | ||
2575 | } | |
2576 | ||
2577 | static inline u32 transport_get_size( | |
2578 | u32 sectors, | |
2579 | unsigned char *cdb, | |
2580 | struct se_cmd *cmd) | |
2581 | { | |
5951146d | 2582 | struct se_device *dev = cmd->se_dev; |
c66ac9db | 2583 | |
e3d6f909 | 2584 | if (dev->transport->get_device_type(dev) == TYPE_TAPE) { |
c66ac9db | 2585 | if (cdb[1] & 1) { /* sectors */ |
e3d6f909 | 2586 | return dev->se_sub_dev->se_dev_attrib.block_size * sectors; |
c66ac9db NB |
2587 | } else /* bytes */ |
2588 | return sectors; | |
2589 | } | |
2590 | #if 0 | |
6708bb27 | 2591 | pr_debug("Returning block_size: %u, sectors: %u == %u for" |
e3d6f909 AG |
2592 | " %s object\n", dev->se_sub_dev->se_dev_attrib.block_size, sectors, |
2593 | dev->se_sub_dev->se_dev_attrib.block_size * sectors, | |
2594 | dev->transport->name); | |
c66ac9db | 2595 | #endif |
e3d6f909 | 2596 | return dev->se_sub_dev->se_dev_attrib.block_size * sectors; |
c66ac9db NB |
2597 | } |
2598 | ||
c66ac9db NB |
2599 | static void transport_xor_callback(struct se_cmd *cmd) |
2600 | { | |
2601 | unsigned char *buf, *addr; | |
ec98f782 | 2602 | struct scatterlist *sg; |
c66ac9db NB |
2603 | unsigned int offset; |
2604 | int i; | |
ec98f782 | 2605 | int count; |
c66ac9db NB |
2606 | /* |
2607 | * From sbc3r22.pdf section 5.48 XDWRITEREAD (10) command | |
2608 | * | |
2609 | * 1) read the specified logical block(s); | |
2610 | * 2) transfer logical blocks from the data-out buffer; | |
2611 | * 3) XOR the logical blocks transferred from the data-out buffer with | |
2612 | * the logical blocks read, storing the resulting XOR data in a buffer; | |
2613 | * 4) if the DISABLE WRITE bit is set to zero, then write the logical | |
2614 | * blocks transferred from the data-out buffer; and | |
2615 | * 5) transfer the resulting XOR data to the data-in buffer. | |
2616 | */ | |
2617 | buf = kmalloc(cmd->data_length, GFP_KERNEL); | |
6708bb27 AG |
2618 | if (!buf) { |
2619 | pr_err("Unable to allocate xor_callback buf\n"); | |
c66ac9db NB |
2620 | return; |
2621 | } | |
2622 | /* | |
ec98f782 | 2623 | * Copy the scatterlist WRITE buffer located at cmd->t_data_sg |
c66ac9db NB |
2624 | * into the locally allocated *buf |
2625 | */ | |
ec98f782 AG |
2626 | sg_copy_to_buffer(cmd->t_data_sg, |
2627 | cmd->t_data_nents, | |
2628 | buf, | |
2629 | cmd->data_length); | |
2630 | ||
c66ac9db NB |
2631 | /* |
2632 | * Now perform the XOR against the BIDI read memory located at | |
a1d8b49a | 2633 | * cmd->t_mem_bidi_list |
c66ac9db NB |
2634 | */ |
2635 | ||
2636 | offset = 0; | |
ec98f782 AG |
2637 | for_each_sg(cmd->t_bidi_data_sg, sg, cmd->t_bidi_data_nents, count) { |
2638 | addr = kmap_atomic(sg_page(sg), KM_USER0); | |
2639 | if (!addr) | |
c66ac9db NB |
2640 | goto out; |
2641 | ||
ec98f782 AG |
2642 | for (i = 0; i < sg->length; i++) |
2643 | *(addr + sg->offset + i) ^= *(buf + offset + i); | |
c66ac9db | 2644 | |
ec98f782 | 2645 | offset += sg->length; |
c66ac9db NB |
2646 | kunmap_atomic(addr, KM_USER0); |
2647 | } | |
ec98f782 | 2648 | |
c66ac9db NB |
2649 | out: |
2650 | kfree(buf); | |
2651 | } | |
2652 | ||
2653 | /* | |
2654 | * Used to obtain Sense Data from underlying Linux/SCSI struct scsi_cmnd | |
2655 | */ | |
2656 | static int transport_get_sense_data(struct se_cmd *cmd) | |
2657 | { | |
2658 | unsigned char *buffer = cmd->sense_buffer, *sense_buffer = NULL; | |
2659 | struct se_device *dev; | |
2660 | struct se_task *task = NULL, *task_tmp; | |
2661 | unsigned long flags; | |
2662 | u32 offset = 0; | |
2663 | ||
e3d6f909 AG |
2664 | WARN_ON(!cmd->se_lun); |
2665 | ||
a1d8b49a | 2666 | spin_lock_irqsave(&cmd->t_state_lock, flags); |
c66ac9db | 2667 | if (cmd->se_cmd_flags & SCF_SENT_CHECK_CONDITION) { |
a1d8b49a | 2668 | spin_unlock_irqrestore(&cmd->t_state_lock, flags); |
c66ac9db NB |
2669 | return 0; |
2670 | } | |
2671 | ||
2672 | list_for_each_entry_safe(task, task_tmp, | |
a1d8b49a | 2673 | &cmd->t_task_list, t_list) { |
c66ac9db NB |
2674 | |
2675 | if (!task->task_sense) | |
2676 | continue; | |
2677 | ||
2678 | dev = task->se_dev; | |
6708bb27 | 2679 | if (!dev) |
c66ac9db NB |
2680 | continue; |
2681 | ||
e3d6f909 | 2682 | if (!dev->transport->get_sense_buffer) { |
6708bb27 | 2683 | pr_err("dev->transport->get_sense_buffer" |
c66ac9db NB |
2684 | " is NULL\n"); |
2685 | continue; | |
2686 | } | |
2687 | ||
e3d6f909 | 2688 | sense_buffer = dev->transport->get_sense_buffer(task); |
6708bb27 AG |
2689 | if (!sense_buffer) { |
2690 | pr_err("ITT[0x%08x]_TASK[%d]: Unable to locate" | |
c66ac9db | 2691 | " sense buffer for task with sense\n", |
e3d6f909 | 2692 | cmd->se_tfo->get_task_tag(cmd), task->task_no); |
c66ac9db NB |
2693 | continue; |
2694 | } | |
a1d8b49a | 2695 | spin_unlock_irqrestore(&cmd->t_state_lock, flags); |
c66ac9db | 2696 | |
e3d6f909 | 2697 | offset = cmd->se_tfo->set_fabric_sense_len(cmd, |
c66ac9db NB |
2698 | TRANSPORT_SENSE_BUFFER); |
2699 | ||
5951146d | 2700 | memcpy(&buffer[offset], sense_buffer, |
c66ac9db NB |
2701 | TRANSPORT_SENSE_BUFFER); |
2702 | cmd->scsi_status = task->task_scsi_status; | |
2703 | /* Automatically padded */ | |
2704 | cmd->scsi_sense_length = | |
2705 | (TRANSPORT_SENSE_BUFFER + offset); | |
2706 | ||
6708bb27 | 2707 | pr_debug("HBA_[%u]_PLUG[%s]: Set SAM STATUS: 0x%02x" |
c66ac9db | 2708 | " and sense\n", |
e3d6f909 | 2709 | dev->se_hba->hba_id, dev->transport->name, |
c66ac9db NB |
2710 | cmd->scsi_status); |
2711 | return 0; | |
2712 | } | |
a1d8b49a | 2713 | spin_unlock_irqrestore(&cmd->t_state_lock, flags); |
c66ac9db NB |
2714 | |
2715 | return -1; | |
2716 | } | |
2717 | ||
c66ac9db NB |
2718 | static int |
2719 | transport_handle_reservation_conflict(struct se_cmd *cmd) | |
2720 | { | |
c66ac9db NB |
2721 | cmd->se_cmd_flags |= SCF_SCSI_CDB_EXCEPTION; |
2722 | cmd->se_cmd_flags |= SCF_SCSI_RESERVATION_CONFLICT; | |
2723 | cmd->scsi_status = SAM_STAT_RESERVATION_CONFLICT; | |
2724 | /* | |
2725 | * For UA Interlock Code 11b, a RESERVATION CONFLICT will | |
2726 | * establish a UNIT ATTENTION with PREVIOUS RESERVATION | |
2727 | * CONFLICT STATUS. | |
2728 | * | |
2729 | * See spc4r17, section 7.4.6 Control Mode Page, Table 349 | |
2730 | */ | |
e3d6f909 AG |
2731 | if (cmd->se_sess && |
2732 | cmd->se_dev->se_sub_dev->se_dev_attrib.emulate_ua_intlck_ctrl == 2) | |
2733 | core_scsi3_ua_allocate(cmd->se_sess->se_node_acl, | |
c66ac9db NB |
2734 | cmd->orig_fe_lun, 0x2C, |
2735 | ASCQ_2CH_PREVIOUS_RESERVATION_CONFLICT_STATUS); | |
5951146d | 2736 | return -EINVAL; |
c66ac9db NB |
2737 | } |
2738 | ||
ec98f782 AG |
2739 | static inline long long transport_dev_end_lba(struct se_device *dev) |
2740 | { | |
2741 | return dev->transport->get_blocks(dev) + 1; | |
2742 | } | |
2743 | ||
2744 | static int transport_cmd_get_valid_sectors(struct se_cmd *cmd) | |
2745 | { | |
2746 | struct se_device *dev = cmd->se_dev; | |
2747 | u32 sectors; | |
2748 | ||
2749 | if (dev->transport->get_device_type(dev) != TYPE_DISK) | |
2750 | return 0; | |
2751 | ||
2752 | sectors = (cmd->data_length / dev->se_sub_dev->se_dev_attrib.block_size); | |
2753 | ||
6708bb27 AG |
2754 | if ((cmd->t_task_lba + sectors) > transport_dev_end_lba(dev)) { |
2755 | pr_err("LBA: %llu Sectors: %u exceeds" | |
ec98f782 AG |
2756 | " transport_dev_end_lba(): %llu\n", |
2757 | cmd->t_task_lba, sectors, | |
2758 | transport_dev_end_lba(dev)); | |
7abbe7f3 | 2759 | return -EINVAL; |
ec98f782 AG |
2760 | } |
2761 | ||
7abbe7f3 | 2762 | return 0; |
ec98f782 AG |
2763 | } |
2764 | ||
706d5860 NB |
2765 | static int target_check_write_same_discard(unsigned char *flags, struct se_device *dev) |
2766 | { | |
2767 | /* | |
2768 | * Determine if the received WRITE_SAME is used to for direct | |
2769 | * passthrough into Linux/SCSI with struct request via TCM/pSCSI | |
2770 | * or we are signaling the use of internal WRITE_SAME + UNMAP=1 | |
2771 | * emulation for -> Linux/BLOCK disbard with TCM/IBLOCK code. | |
2772 | */ | |
2773 | int passthrough = (dev->transport->transport_type == | |
2774 | TRANSPORT_PLUGIN_PHBA_PDEV); | |
2775 | ||
2776 | if (!passthrough) { | |
2777 | if ((flags[0] & 0x04) || (flags[0] & 0x02)) { | |
2778 | pr_err("WRITE_SAME PBDATA and LBDATA" | |
2779 | " bits not supported for Block Discard" | |
2780 | " Emulation\n"); | |
2781 | return -ENOSYS; | |
2782 | } | |
2783 | /* | |
2784 | * Currently for the emulated case we only accept | |
2785 | * tpws with the UNMAP=1 bit set. | |
2786 | */ | |
2787 | if (!(flags[0] & 0x08)) { | |
2788 | pr_err("WRITE_SAME w/o UNMAP bit not" | |
2789 | " supported for Block Discard Emulation\n"); | |
2790 | return -ENOSYS; | |
2791 | } | |
2792 | } | |
2793 | ||
2794 | return 0; | |
2795 | } | |
2796 | ||
c66ac9db NB |
2797 | /* transport_generic_cmd_sequencer(): |
2798 | * | |
2799 | * Generic Command Sequencer that should work for most DAS transport | |
2800 | * drivers. | |
2801 | * | |
2802 | * Called from transport_generic_allocate_tasks() in the $FABRIC_MOD | |
2803 | * RX Thread. | |
2804 | * | |
2805 | * FIXME: Need to support other SCSI OPCODES where as well. | |
2806 | */ | |
2807 | static int transport_generic_cmd_sequencer( | |
2808 | struct se_cmd *cmd, | |
2809 | unsigned char *cdb) | |
2810 | { | |
5951146d | 2811 | struct se_device *dev = cmd->se_dev; |
c66ac9db NB |
2812 | struct se_subsystem_dev *su_dev = dev->se_sub_dev; |
2813 | int ret = 0, sector_ret = 0, passthrough; | |
2814 | u32 sectors = 0, size = 0, pr_reg_type = 0; | |
2815 | u16 service_action; | |
2816 | u8 alua_ascq = 0; | |
2817 | /* | |
2818 | * Check for an existing UNIT ATTENTION condition | |
2819 | */ | |
2820 | if (core_scsi3_ua_check(cmd, cdb) < 0) { | |
c66ac9db NB |
2821 | cmd->se_cmd_flags |= SCF_SCSI_CDB_EXCEPTION; |
2822 | cmd->scsi_sense_reason = TCM_CHECK_CONDITION_UNIT_ATTENTION; | |
5951146d | 2823 | return -EINVAL; |
c66ac9db NB |
2824 | } |
2825 | /* | |
2826 | * Check status of Asymmetric Logical Unit Assignment port | |
2827 | */ | |
e3d6f909 | 2828 | ret = su_dev->t10_alua.alua_state_check(cmd, cdb, &alua_ascq); |
c66ac9db | 2829 | if (ret != 0) { |
c66ac9db | 2830 | /* |
25985edc | 2831 | * Set SCSI additional sense code (ASC) to 'LUN Not Accessible'; |
c66ac9db NB |
2832 | * The ALUA additional sense code qualifier (ASCQ) is determined |
2833 | * by the ALUA primary or secondary access state.. | |
2834 | */ | |
2835 | if (ret > 0) { | |
2836 | #if 0 | |
6708bb27 | 2837 | pr_debug("[%s]: ALUA TG Port not available," |
c66ac9db | 2838 | " SenseKey: NOT_READY, ASC/ASCQ: 0x04/0x%02x\n", |
e3d6f909 | 2839 | cmd->se_tfo->get_fabric_name(), alua_ascq); |
c66ac9db NB |
2840 | #endif |
2841 | transport_set_sense_codes(cmd, 0x04, alua_ascq); | |
2842 | cmd->se_cmd_flags |= SCF_SCSI_CDB_EXCEPTION; | |
2843 | cmd->scsi_sense_reason = TCM_CHECK_CONDITION_NOT_READY; | |
5951146d | 2844 | return -EINVAL; |
c66ac9db NB |
2845 | } |
2846 | goto out_invalid_cdb_field; | |
2847 | } | |
2848 | /* | |
2849 | * Check status for SPC-3 Persistent Reservations | |
2850 | */ | |
e3d6f909 AG |
2851 | if (su_dev->t10_pr.pr_ops.t10_reservation_check(cmd, &pr_reg_type) != 0) { |
2852 | if (su_dev->t10_pr.pr_ops.t10_seq_non_holder( | |
c66ac9db NB |
2853 | cmd, cdb, pr_reg_type) != 0) |
2854 | return transport_handle_reservation_conflict(cmd); | |
2855 | /* | |
2856 | * This means the CDB is allowed for the SCSI Initiator port | |
2857 | * when said port is *NOT* holding the legacy SPC-2 or | |
2858 | * SPC-3 Persistent Reservation. | |
2859 | */ | |
2860 | } | |
2861 | ||
2862 | switch (cdb[0]) { | |
2863 | case READ_6: | |
2864 | sectors = transport_get_sectors_6(cdb, cmd, §or_ret); | |
2865 | if (sector_ret) | |
2866 | goto out_unsupported_cdb; | |
2867 | size = transport_get_size(sectors, cdb, cmd); | |
2868 | cmd->transport_split_cdb = &split_cdb_XX_6; | |
a1d8b49a | 2869 | cmd->t_task_lba = transport_lba_21(cdb); |
c66ac9db NB |
2870 | cmd->se_cmd_flags |= SCF_SCSI_DATA_SG_IO_CDB; |
2871 | break; | |
2872 | case READ_10: | |
2873 | sectors = transport_get_sectors_10(cdb, cmd, §or_ret); | |
2874 | if (sector_ret) | |
2875 | goto out_unsupported_cdb; | |
2876 | size = transport_get_size(sectors, cdb, cmd); | |
2877 | cmd->transport_split_cdb = &split_cdb_XX_10; | |
a1d8b49a | 2878 | cmd->t_task_lba = transport_lba_32(cdb); |
c66ac9db NB |
2879 | cmd->se_cmd_flags |= SCF_SCSI_DATA_SG_IO_CDB; |
2880 | break; | |
2881 | case READ_12: | |
2882 | sectors = transport_get_sectors_12(cdb, cmd, §or_ret); | |
2883 | if (sector_ret) | |
2884 | goto out_unsupported_cdb; | |
2885 | size = transport_get_size(sectors, cdb, cmd); | |
2886 | cmd->transport_split_cdb = &split_cdb_XX_12; | |
a1d8b49a | 2887 | cmd->t_task_lba = transport_lba_32(cdb); |
c66ac9db NB |
2888 | cmd->se_cmd_flags |= SCF_SCSI_DATA_SG_IO_CDB; |
2889 | break; | |
2890 | case READ_16: | |
2891 | sectors = transport_get_sectors_16(cdb, cmd, §or_ret); | |
2892 | if (sector_ret) | |
2893 | goto out_unsupported_cdb; | |
2894 | size = transport_get_size(sectors, cdb, cmd); | |
2895 | cmd->transport_split_cdb = &split_cdb_XX_16; | |
a1d8b49a | 2896 | cmd->t_task_lba = transport_lba_64(cdb); |
c66ac9db NB |
2897 | cmd->se_cmd_flags |= SCF_SCSI_DATA_SG_IO_CDB; |
2898 | break; | |
2899 | case WRITE_6: | |
2900 | sectors = transport_get_sectors_6(cdb, cmd, §or_ret); | |
2901 | if (sector_ret) | |
2902 | goto out_unsupported_cdb; | |
2903 | size = transport_get_size(sectors, cdb, cmd); | |
2904 | cmd->transport_split_cdb = &split_cdb_XX_6; | |
a1d8b49a | 2905 | cmd->t_task_lba = transport_lba_21(cdb); |
c66ac9db NB |
2906 | cmd->se_cmd_flags |= SCF_SCSI_DATA_SG_IO_CDB; |
2907 | break; | |
2908 | case WRITE_10: | |
2909 | sectors = transport_get_sectors_10(cdb, cmd, §or_ret); | |
2910 | if (sector_ret) | |
2911 | goto out_unsupported_cdb; | |
2912 | size = transport_get_size(sectors, cdb, cmd); | |
2913 | cmd->transport_split_cdb = &split_cdb_XX_10; | |
a1d8b49a AG |
2914 | cmd->t_task_lba = transport_lba_32(cdb); |
2915 | cmd->t_tasks_fua = (cdb[1] & 0x8); | |
c66ac9db NB |
2916 | cmd->se_cmd_flags |= SCF_SCSI_DATA_SG_IO_CDB; |
2917 | break; | |
2918 | case WRITE_12: | |
2919 | sectors = transport_get_sectors_12(cdb, cmd, §or_ret); | |
2920 | if (sector_ret) | |
2921 | goto out_unsupported_cdb; | |
2922 | size = transport_get_size(sectors, cdb, cmd); | |
2923 | cmd->transport_split_cdb = &split_cdb_XX_12; | |
a1d8b49a AG |
2924 | cmd->t_task_lba = transport_lba_32(cdb); |
2925 | cmd->t_tasks_fua = (cdb[1] & 0x8); | |
c66ac9db NB |
2926 | cmd->se_cmd_flags |= SCF_SCSI_DATA_SG_IO_CDB; |
2927 | break; | |
2928 | case WRITE_16: | |
2929 | sectors = transport_get_sectors_16(cdb, cmd, §or_ret); | |
2930 | if (sector_ret) | |
2931 | goto out_unsupported_cdb; | |
2932 | size = transport_get_size(sectors, cdb, cmd); | |
2933 | cmd->transport_split_cdb = &split_cdb_XX_16; | |
a1d8b49a AG |
2934 | cmd->t_task_lba = transport_lba_64(cdb); |
2935 | cmd->t_tasks_fua = (cdb[1] & 0x8); | |
c66ac9db NB |
2936 | cmd->se_cmd_flags |= SCF_SCSI_DATA_SG_IO_CDB; |
2937 | break; | |
2938 | case XDWRITEREAD_10: | |
2939 | if ((cmd->data_direction != DMA_TO_DEVICE) || | |
a1d8b49a | 2940 | !(cmd->t_tasks_bidi)) |
c66ac9db NB |
2941 | goto out_invalid_cdb_field; |
2942 | sectors = transport_get_sectors_10(cdb, cmd, §or_ret); | |
2943 | if (sector_ret) | |
2944 | goto out_unsupported_cdb; | |
2945 | size = transport_get_size(sectors, cdb, cmd); | |
2946 | cmd->transport_split_cdb = &split_cdb_XX_10; | |
a1d8b49a | 2947 | cmd->t_task_lba = transport_lba_32(cdb); |
c66ac9db | 2948 | cmd->se_cmd_flags |= SCF_SCSI_DATA_SG_IO_CDB; |
e3d6f909 | 2949 | passthrough = (dev->transport->transport_type == |
c66ac9db NB |
2950 | TRANSPORT_PLUGIN_PHBA_PDEV); |
2951 | /* | |
2952 | * Skip the remaining assignments for TCM/PSCSI passthrough | |
2953 | */ | |
2954 | if (passthrough) | |
2955 | break; | |
2956 | /* | |
2957 | * Setup BIDI XOR callback to be run during transport_generic_complete_ok() | |
2958 | */ | |
2959 | cmd->transport_complete_callback = &transport_xor_callback; | |
a1d8b49a | 2960 | cmd->t_tasks_fua = (cdb[1] & 0x8); |
c66ac9db NB |
2961 | break; |
2962 | case VARIABLE_LENGTH_CMD: | |
2963 | service_action = get_unaligned_be16(&cdb[8]); | |
2964 | /* | |
2965 | * Determine if this is TCM/PSCSI device and we should disable | |
2966 | * internal emulation for this CDB. | |
2967 | */ | |
e3d6f909 | 2968 | passthrough = (dev->transport->transport_type == |
c66ac9db NB |
2969 | TRANSPORT_PLUGIN_PHBA_PDEV); |
2970 | ||
2971 | switch (service_action) { | |
2972 | case XDWRITEREAD_32: | |
2973 | sectors = transport_get_sectors_32(cdb, cmd, §or_ret); | |
2974 | if (sector_ret) | |
2975 | goto out_unsupported_cdb; | |
2976 | size = transport_get_size(sectors, cdb, cmd); | |
2977 | /* | |
2978 | * Use WRITE_32 and READ_32 opcodes for the emulated | |
2979 | * XDWRITE_READ_32 logic. | |
2980 | */ | |
2981 | cmd->transport_split_cdb = &split_cdb_XX_32; | |
a1d8b49a | 2982 | cmd->t_task_lba = transport_lba_64_ext(cdb); |
c66ac9db NB |
2983 | cmd->se_cmd_flags |= SCF_SCSI_DATA_SG_IO_CDB; |
2984 | ||
2985 | /* | |
2986 | * Skip the remaining assignments for TCM/PSCSI passthrough | |
2987 | */ | |
2988 | if (passthrough) | |
2989 | break; | |
2990 | ||
2991 | /* | |
2992 | * Setup BIDI XOR callback to be run during | |
2993 | * transport_generic_complete_ok() | |
2994 | */ | |
2995 | cmd->transport_complete_callback = &transport_xor_callback; | |
a1d8b49a | 2996 | cmd->t_tasks_fua = (cdb[10] & 0x8); |
c66ac9db NB |
2997 | break; |
2998 | case WRITE_SAME_32: | |
2999 | sectors = transport_get_sectors_32(cdb, cmd, §or_ret); | |
3000 | if (sector_ret) | |
3001 | goto out_unsupported_cdb; | |
dd3a5ad8 | 3002 | |
6708bb27 | 3003 | if (sectors) |
12850626 | 3004 | size = transport_get_size(1, cdb, cmd); |
6708bb27 AG |
3005 | else { |
3006 | pr_err("WSNZ=1, WRITE_SAME w/sectors=0 not" | |
3007 | " supported\n"); | |
3008 | goto out_invalid_cdb_field; | |
3009 | } | |
dd3a5ad8 | 3010 | |
a1d8b49a | 3011 | cmd->t_task_lba = get_unaligned_be64(&cdb[12]); |
c66ac9db NB |
3012 | cmd->se_cmd_flags |= SCF_SCSI_CONTROL_SG_IO_CDB; |
3013 | ||
706d5860 | 3014 | if (target_check_write_same_discard(&cdb[10], dev) < 0) |
c66ac9db | 3015 | goto out_invalid_cdb_field; |
706d5860 | 3016 | |
c66ac9db NB |
3017 | break; |
3018 | default: | |
6708bb27 | 3019 | pr_err("VARIABLE_LENGTH_CMD service action" |
c66ac9db NB |
3020 | " 0x%04x not supported\n", service_action); |
3021 | goto out_unsupported_cdb; | |
3022 | } | |
3023 | break; | |
e434f1f1 | 3024 | case MAINTENANCE_IN: |
e3d6f909 | 3025 | if (dev->transport->get_device_type(dev) != TYPE_ROM) { |
c66ac9db NB |
3026 | /* MAINTENANCE_IN from SCC-2 */ |
3027 | /* | |
3028 | * Check for emulated MI_REPORT_TARGET_PGS. | |
3029 | */ | |
3030 | if (cdb[1] == MI_REPORT_TARGET_PGS) { | |
3031 | cmd->transport_emulate_cdb = | |
e3d6f909 | 3032 | (su_dev->t10_alua.alua_type == |
c66ac9db | 3033 | SPC3_ALUA_EMULATED) ? |
e3d6f909 | 3034 | core_emulate_report_target_port_groups : |
c66ac9db NB |
3035 | NULL; |
3036 | } | |
3037 | size = (cdb[6] << 24) | (cdb[7] << 16) | | |
3038 | (cdb[8] << 8) | cdb[9]; | |
3039 | } else { | |
3040 | /* GPCMD_SEND_KEY from multi media commands */ | |
3041 | size = (cdb[8] << 8) + cdb[9]; | |
3042 | } | |
05d1c7c0 | 3043 | cmd->se_cmd_flags |= SCF_SCSI_CONTROL_SG_IO_CDB; |
c66ac9db NB |
3044 | break; |
3045 | case MODE_SELECT: | |
3046 | size = cdb[4]; | |
3047 | cmd->se_cmd_flags |= SCF_SCSI_CONTROL_SG_IO_CDB; | |
3048 | break; | |
3049 | case MODE_SELECT_10: | |
3050 | size = (cdb[7] << 8) + cdb[8]; | |
3051 | cmd->se_cmd_flags |= SCF_SCSI_CONTROL_SG_IO_CDB; | |
3052 | break; | |
3053 | case MODE_SENSE: | |
3054 | size = cdb[4]; | |
05d1c7c0 | 3055 | cmd->se_cmd_flags |= SCF_SCSI_CONTROL_SG_IO_CDB; |
c66ac9db NB |
3056 | break; |
3057 | case MODE_SENSE_10: | |
3058 | case GPCMD_READ_BUFFER_CAPACITY: | |
3059 | case GPCMD_SEND_OPC: | |
3060 | case LOG_SELECT: | |
3061 | case LOG_SENSE: | |
3062 | size = (cdb[7] << 8) + cdb[8]; | |
05d1c7c0 | 3063 | cmd->se_cmd_flags |= SCF_SCSI_CONTROL_SG_IO_CDB; |
c66ac9db NB |
3064 | break; |
3065 | case READ_BLOCK_LIMITS: | |
3066 | size = READ_BLOCK_LEN; | |
05d1c7c0 | 3067 | cmd->se_cmd_flags |= SCF_SCSI_CONTROL_SG_IO_CDB; |
c66ac9db NB |
3068 | break; |
3069 | case GPCMD_GET_CONFIGURATION: | |
3070 | case GPCMD_READ_FORMAT_CAPACITIES: | |
3071 | case GPCMD_READ_DISC_INFO: | |
3072 | case GPCMD_READ_TRACK_RZONE_INFO: | |
3073 | size = (cdb[7] << 8) + cdb[8]; | |
3074 | cmd->se_cmd_flags |= SCF_SCSI_CONTROL_SG_IO_CDB; | |
3075 | break; | |
3076 | case PERSISTENT_RESERVE_IN: | |
3077 | case PERSISTENT_RESERVE_OUT: | |
3078 | cmd->transport_emulate_cdb = | |
e3d6f909 | 3079 | (su_dev->t10_pr.res_type == |
c66ac9db | 3080 | SPC3_PERSISTENT_RESERVATIONS) ? |
e3d6f909 | 3081 | core_scsi3_emulate_pr : NULL; |
c66ac9db | 3082 | size = (cdb[7] << 8) + cdb[8]; |
05d1c7c0 | 3083 | cmd->se_cmd_flags |= SCF_SCSI_CONTROL_SG_IO_CDB; |
c66ac9db NB |
3084 | break; |
3085 | case GPCMD_MECHANISM_STATUS: | |
3086 | case GPCMD_READ_DVD_STRUCTURE: | |
3087 | size = (cdb[8] << 8) + cdb[9]; | |
3088 | cmd->se_cmd_flags |= SCF_SCSI_CONTROL_SG_IO_CDB; | |
3089 | break; | |
3090 | case READ_POSITION: | |
3091 | size = READ_POSITION_LEN; | |
05d1c7c0 | 3092 | cmd->se_cmd_flags |= SCF_SCSI_CONTROL_SG_IO_CDB; |
c66ac9db | 3093 | break; |
e434f1f1 | 3094 | case MAINTENANCE_OUT: |
e3d6f909 | 3095 | if (dev->transport->get_device_type(dev) != TYPE_ROM) { |
c66ac9db NB |
3096 | /* MAINTENANCE_OUT from SCC-2 |
3097 | * | |
3098 | * Check for emulated MO_SET_TARGET_PGS. | |
3099 | */ | |
3100 | if (cdb[1] == MO_SET_TARGET_PGS) { | |
3101 | cmd->transport_emulate_cdb = | |
e3d6f909 | 3102 | (su_dev->t10_alua.alua_type == |
c66ac9db | 3103 | SPC3_ALUA_EMULATED) ? |
e3d6f909 | 3104 | core_emulate_set_target_port_groups : |
c66ac9db NB |
3105 | NULL; |
3106 | } | |
3107 | ||
3108 | size = (cdb[6] << 24) | (cdb[7] << 16) | | |
3109 | (cdb[8] << 8) | cdb[9]; | |
3110 | } else { | |
3111 | /* GPCMD_REPORT_KEY from multi media commands */ | |
3112 | size = (cdb[8] << 8) + cdb[9]; | |
3113 | } | |
05d1c7c0 | 3114 | cmd->se_cmd_flags |= SCF_SCSI_CONTROL_SG_IO_CDB; |
c66ac9db NB |
3115 | break; |
3116 | case INQUIRY: | |
3117 | size = (cdb[3] << 8) + cdb[4]; | |
3118 | /* | |
3119 | * Do implict HEAD_OF_QUEUE processing for INQUIRY. | |
3120 | * See spc4r17 section 5.3 | |
3121 | */ | |
5951146d | 3122 | if (cmd->se_dev->dev_task_attr_type == SAM_TASK_ATTR_EMULATED) |
e66ecd50 | 3123 | cmd->sam_task_attr = MSG_HEAD_TAG; |
05d1c7c0 | 3124 | cmd->se_cmd_flags |= SCF_SCSI_CONTROL_SG_IO_CDB; |
c66ac9db NB |
3125 | break; |
3126 | case READ_BUFFER: | |
3127 | size = (cdb[6] << 16) + (cdb[7] << 8) + cdb[8]; | |
05d1c7c0 | 3128 | cmd->se_cmd_flags |= SCF_SCSI_CONTROL_SG_IO_CDB; |
c66ac9db NB |
3129 | break; |
3130 | case READ_CAPACITY: | |
3131 | size = READ_CAP_LEN; | |
05d1c7c0 | 3132 | cmd->se_cmd_flags |= SCF_SCSI_CONTROL_SG_IO_CDB; |
c66ac9db NB |
3133 | break; |
3134 | case READ_MEDIA_SERIAL_NUMBER: | |
3135 | case SECURITY_PROTOCOL_IN: | |
3136 | case SECURITY_PROTOCOL_OUT: | |
3137 | size = (cdb[6] << 24) | (cdb[7] << 16) | (cdb[8] << 8) | cdb[9]; | |
05d1c7c0 | 3138 | cmd->se_cmd_flags |= SCF_SCSI_CONTROL_SG_IO_CDB; |
c66ac9db NB |
3139 | break; |
3140 | case SERVICE_ACTION_IN: | |
3141 | case ACCESS_CONTROL_IN: | |
3142 | case ACCESS_CONTROL_OUT: | |
3143 | case EXTENDED_COPY: | |
3144 | case READ_ATTRIBUTE: | |
3145 | case RECEIVE_COPY_RESULTS: | |
3146 | case WRITE_ATTRIBUTE: | |
3147 | size = (cdb[10] << 24) | (cdb[11] << 16) | | |
3148 | (cdb[12] << 8) | cdb[13]; | |
05d1c7c0 | 3149 | cmd->se_cmd_flags |= SCF_SCSI_CONTROL_SG_IO_CDB; |
c66ac9db NB |
3150 | break; |
3151 | case RECEIVE_DIAGNOSTIC: | |
3152 | case SEND_DIAGNOSTIC: | |
3153 | size = (cdb[3] << 8) | cdb[4]; | |
05d1c7c0 | 3154 | cmd->se_cmd_flags |= SCF_SCSI_CONTROL_SG_IO_CDB; |
c66ac9db NB |
3155 | break; |
3156 | /* #warning FIXME: Figure out correct GPCMD_READ_CD blocksize. */ | |
3157 | #if 0 | |
3158 | case GPCMD_READ_CD: | |
3159 | sectors = (cdb[6] << 16) + (cdb[7] << 8) + cdb[8]; | |
3160 | size = (2336 * sectors); | |
05d1c7c0 | 3161 | cmd->se_cmd_flags |= SCF_SCSI_CONTROL_SG_IO_CDB; |
c66ac9db NB |
3162 | break; |
3163 | #endif | |
3164 | case READ_TOC: | |
3165 | size = cdb[8]; | |
05d1c7c0 | 3166 | cmd->se_cmd_flags |= SCF_SCSI_CONTROL_SG_IO_CDB; |
c66ac9db NB |
3167 | break; |
3168 | case REQUEST_SENSE: | |
3169 | size = cdb[4]; | |
05d1c7c0 | 3170 | cmd->se_cmd_flags |= SCF_SCSI_CONTROL_SG_IO_CDB; |
c66ac9db NB |
3171 | break; |
3172 | case READ_ELEMENT_STATUS: | |
3173 | size = 65536 * cdb[7] + 256 * cdb[8] + cdb[9]; | |
05d1c7c0 | 3174 | cmd->se_cmd_flags |= SCF_SCSI_CONTROL_SG_IO_CDB; |
c66ac9db NB |
3175 | break; |
3176 | case WRITE_BUFFER: | |
3177 | size = (cdb[6] << 16) + (cdb[7] << 8) + cdb[8]; | |
05d1c7c0 | 3178 | cmd->se_cmd_flags |= SCF_SCSI_CONTROL_SG_IO_CDB; |
c66ac9db NB |
3179 | break; |
3180 | case RESERVE: | |
3181 | case RESERVE_10: | |
3182 | /* | |
3183 | * The SPC-2 RESERVE does not contain a size in the SCSI CDB. | |
3184 | * Assume the passthrough or $FABRIC_MOD will tell us about it. | |
3185 | */ | |
3186 | if (cdb[0] == RESERVE_10) | |
3187 | size = (cdb[7] << 8) | cdb[8]; | |
3188 | else | |
3189 | size = cmd->data_length; | |
3190 | ||
3191 | /* | |
3192 | * Setup the legacy emulated handler for SPC-2 and | |
3193 | * >= SPC-3 compatible reservation handling (CRH=1) | |
3194 | * Otherwise, we assume the underlying SCSI logic is | |
3195 | * is running in SPC_PASSTHROUGH, and wants reservations | |
3196 | * emulation disabled. | |
3197 | */ | |
3198 | cmd->transport_emulate_cdb = | |
e3d6f909 | 3199 | (su_dev->t10_pr.res_type != |
c66ac9db | 3200 | SPC_PASSTHROUGH) ? |
e3d6f909 | 3201 | core_scsi2_emulate_crh : NULL; |
c66ac9db NB |
3202 | cmd->se_cmd_flags |= SCF_SCSI_NON_DATA_CDB; |
3203 | break; | |
3204 | case RELEASE: | |
3205 | case RELEASE_10: | |
3206 | /* | |
3207 | * The SPC-2 RELEASE does not contain a size in the SCSI CDB. | |
3208 | * Assume the passthrough or $FABRIC_MOD will tell us about it. | |
3209 | */ | |
3210 | if (cdb[0] == RELEASE_10) | |
3211 | size = (cdb[7] << 8) | cdb[8]; | |
3212 | else | |
3213 | size = cmd->data_length; | |
3214 | ||
3215 | cmd->transport_emulate_cdb = | |
e3d6f909 | 3216 | (su_dev->t10_pr.res_type != |
c66ac9db | 3217 | SPC_PASSTHROUGH) ? |
e3d6f909 | 3218 | core_scsi2_emulate_crh : NULL; |
c66ac9db NB |
3219 | cmd->se_cmd_flags |= SCF_SCSI_NON_DATA_CDB; |
3220 | break; | |
3221 | case SYNCHRONIZE_CACHE: | |
3222 | case 0x91: /* SYNCHRONIZE_CACHE_16: */ | |
3223 | /* | |
3224 | * Extract LBA and range to be flushed for emulated SYNCHRONIZE_CACHE | |
3225 | */ | |
3226 | if (cdb[0] == SYNCHRONIZE_CACHE) { | |
3227 | sectors = transport_get_sectors_10(cdb, cmd, §or_ret); | |
a1d8b49a | 3228 | cmd->t_task_lba = transport_lba_32(cdb); |
c66ac9db NB |
3229 | } else { |
3230 | sectors = transport_get_sectors_16(cdb, cmd, §or_ret); | |
a1d8b49a | 3231 | cmd->t_task_lba = transport_lba_64(cdb); |
c66ac9db NB |
3232 | } |
3233 | if (sector_ret) | |
3234 | goto out_unsupported_cdb; | |
3235 | ||
3236 | size = transport_get_size(sectors, cdb, cmd); | |
3237 | cmd->se_cmd_flags |= SCF_SCSI_NON_DATA_CDB; | |
3238 | ||
3239 | /* | |
3240 | * For TCM/pSCSI passthrough, skip cmd->transport_emulate_cdb() | |
3241 | */ | |
e3d6f909 | 3242 | if (dev->transport->transport_type == TRANSPORT_PLUGIN_PHBA_PDEV) |
c66ac9db NB |
3243 | break; |
3244 | /* | |
3245 | * Set SCF_EMULATE_CDB_ASYNC to ensure asynchronous operation | |
3246 | * for SYNCHRONIZE_CACHE* Immed=1 case in __transport_execute_tasks() | |
3247 | */ | |
3248 | cmd->se_cmd_flags |= SCF_EMULATE_CDB_ASYNC; | |
3249 | /* | |
3250 | * Check to ensure that LBA + Range does not exceed past end of | |
7abbe7f3 | 3251 | * device for IBLOCK and FILEIO ->do_sync_cache() backend calls |
c66ac9db | 3252 | */ |
7abbe7f3 NB |
3253 | if ((cmd->t_task_lba != 0) || (sectors != 0)) { |
3254 | if (transport_cmd_get_valid_sectors(cmd) < 0) | |
3255 | goto out_invalid_cdb_field; | |
3256 | } | |
c66ac9db NB |
3257 | break; |
3258 | case UNMAP: | |
3259 | size = get_unaligned_be16(&cdb[7]); | |
05d1c7c0 | 3260 | cmd->se_cmd_flags |= SCF_SCSI_CONTROL_SG_IO_CDB; |
c66ac9db NB |
3261 | break; |
3262 | case WRITE_SAME_16: | |
3263 | sectors = transport_get_sectors_16(cdb, cmd, §or_ret); | |
3264 | if (sector_ret) | |
3265 | goto out_unsupported_cdb; | |
dd3a5ad8 | 3266 | |
6708bb27 | 3267 | if (sectors) |
12850626 | 3268 | size = transport_get_size(1, cdb, cmd); |
6708bb27 AG |
3269 | else { |
3270 | pr_err("WSNZ=1, WRITE_SAME w/sectors=0 not supported\n"); | |
3271 | goto out_invalid_cdb_field; | |
3272 | } | |
dd3a5ad8 | 3273 | |
5db0753b | 3274 | cmd->t_task_lba = get_unaligned_be64(&cdb[2]); |
706d5860 NB |
3275 | cmd->se_cmd_flags |= SCF_SCSI_CONTROL_SG_IO_CDB; |
3276 | ||
3277 | if (target_check_write_same_discard(&cdb[1], dev) < 0) | |
3278 | goto out_invalid_cdb_field; | |
3279 | break; | |
3280 | case WRITE_SAME: | |
3281 | sectors = transport_get_sectors_10(cdb, cmd, §or_ret); | |
3282 | if (sector_ret) | |
3283 | goto out_unsupported_cdb; | |
3284 | ||
3285 | if (sectors) | |
12850626 | 3286 | size = transport_get_size(1, cdb, cmd); |
706d5860 NB |
3287 | else { |
3288 | pr_err("WSNZ=1, WRITE_SAME w/sectors=0 not supported\n"); | |
3289 | goto out_invalid_cdb_field; | |
c66ac9db | 3290 | } |
706d5860 NB |
3291 | |
3292 | cmd->t_task_lba = get_unaligned_be32(&cdb[2]); | |
c66ac9db | 3293 | cmd->se_cmd_flags |= SCF_SCSI_CONTROL_SG_IO_CDB; |
706d5860 NB |
3294 | /* |
3295 | * Follow sbcr26 with WRITE_SAME (10) and check for the existence | |
3296 | * of byte 1 bit 3 UNMAP instead of original reserved field | |
3297 | */ | |
3298 | if (target_check_write_same_discard(&cdb[1], dev) < 0) | |
3299 | goto out_invalid_cdb_field; | |
c66ac9db NB |
3300 | break; |
3301 | case ALLOW_MEDIUM_REMOVAL: | |
3302 | case GPCMD_CLOSE_TRACK: | |
3303 | case ERASE: | |
3304 | case INITIALIZE_ELEMENT_STATUS: | |
3305 | case GPCMD_LOAD_UNLOAD: | |
3306 | case REZERO_UNIT: | |
3307 | case SEEK_10: | |
3308 | case GPCMD_SET_SPEED: | |
3309 | case SPACE: | |
3310 | case START_STOP: | |
3311 | case TEST_UNIT_READY: | |
3312 | case VERIFY: | |
3313 | case WRITE_FILEMARKS: | |
3314 | case MOVE_MEDIUM: | |
3315 | cmd->se_cmd_flags |= SCF_SCSI_NON_DATA_CDB; | |
3316 | break; | |
3317 | case REPORT_LUNS: | |
3318 | cmd->transport_emulate_cdb = | |
e3d6f909 | 3319 | transport_core_report_lun_response; |
c66ac9db NB |
3320 | size = (cdb[6] << 24) | (cdb[7] << 16) | (cdb[8] << 8) | cdb[9]; |
3321 | /* | |
3322 | * Do implict HEAD_OF_QUEUE processing for REPORT_LUNS | |
3323 | * See spc4r17 section 5.3 | |
3324 | */ | |
5951146d | 3325 | if (cmd->se_dev->dev_task_attr_type == SAM_TASK_ATTR_EMULATED) |
e66ecd50 | 3326 | cmd->sam_task_attr = MSG_HEAD_TAG; |
05d1c7c0 | 3327 | cmd->se_cmd_flags |= SCF_SCSI_CONTROL_SG_IO_CDB; |
c66ac9db NB |
3328 | break; |
3329 | default: | |
6708bb27 | 3330 | pr_warn("TARGET_CORE[%s]: Unsupported SCSI Opcode" |
c66ac9db | 3331 | " 0x%02x, sending CHECK_CONDITION.\n", |
e3d6f909 | 3332 | cmd->se_tfo->get_fabric_name(), cdb[0]); |
c66ac9db NB |
3333 | goto out_unsupported_cdb; |
3334 | } | |
3335 | ||
3336 | if (size != cmd->data_length) { | |
6708bb27 | 3337 | pr_warn("TARGET_CORE[%s]: Expected Transfer Length:" |
c66ac9db | 3338 | " %u does not match SCSI CDB Length: %u for SAM Opcode:" |
e3d6f909 | 3339 | " 0x%02x\n", cmd->se_tfo->get_fabric_name(), |
c66ac9db NB |
3340 | cmd->data_length, size, cdb[0]); |
3341 | ||
3342 | cmd->cmd_spdtl = size; | |
3343 | ||
3344 | if (cmd->data_direction == DMA_TO_DEVICE) { | |
6708bb27 | 3345 | pr_err("Rejecting underflow/overflow" |
c66ac9db NB |
3346 | " WRITE data\n"); |
3347 | goto out_invalid_cdb_field; | |
3348 | } | |
3349 | /* | |
3350 | * Reject READ_* or WRITE_* with overflow/underflow for | |
3351 | * type SCF_SCSI_DATA_SG_IO_CDB. | |
3352 | */ | |
6708bb27 AG |
3353 | if (!ret && (dev->se_sub_dev->se_dev_attrib.block_size != 512)) { |
3354 | pr_err("Failing OVERFLOW/UNDERFLOW for LBA op" | |
c66ac9db | 3355 | " CDB on non 512-byte sector setup subsystem" |
e3d6f909 | 3356 | " plugin: %s\n", dev->transport->name); |
c66ac9db NB |
3357 | /* Returns CHECK_CONDITION + INVALID_CDB_FIELD */ |
3358 | goto out_invalid_cdb_field; | |
3359 | } | |
3360 | ||
3361 | if (size > cmd->data_length) { | |
3362 | cmd->se_cmd_flags |= SCF_OVERFLOW_BIT; | |
3363 | cmd->residual_count = (size - cmd->data_length); | |
3364 | } else { | |
3365 | cmd->se_cmd_flags |= SCF_UNDERFLOW_BIT; | |
3366 | cmd->residual_count = (cmd->data_length - size); | |
3367 | } | |
3368 | cmd->data_length = size; | |
3369 | } | |
3370 | ||
d0229ae3 AG |
3371 | /* Let's limit control cdbs to a page, for simplicity's sake. */ |
3372 | if ((cmd->se_cmd_flags & SCF_SCSI_CONTROL_SG_IO_CDB) && | |
3373 | size > PAGE_SIZE) | |
3374 | goto out_invalid_cdb_field; | |
3375 | ||
c66ac9db NB |
3376 | transport_set_supported_SAM_opcode(cmd); |
3377 | return ret; | |
3378 | ||
3379 | out_unsupported_cdb: | |
3380 | cmd->se_cmd_flags |= SCF_SCSI_CDB_EXCEPTION; | |
3381 | cmd->scsi_sense_reason = TCM_UNSUPPORTED_SCSI_OPCODE; | |
5951146d | 3382 | return -EINVAL; |
c66ac9db NB |
3383 | out_invalid_cdb_field: |
3384 | cmd->se_cmd_flags |= SCF_SCSI_CDB_EXCEPTION; | |
3385 | cmd->scsi_sense_reason = TCM_INVALID_CDB_FIELD; | |
5951146d | 3386 | return -EINVAL; |
c66ac9db NB |
3387 | } |
3388 | ||
c66ac9db NB |
3389 | /* |
3390 | * Called from transport_generic_complete_ok() and | |
3391 | * transport_generic_request_failure() to determine which dormant/delayed | |
3392 | * and ordered cmds need to have their tasks added to the execution queue. | |
3393 | */ | |
3394 | static void transport_complete_task_attr(struct se_cmd *cmd) | |
3395 | { | |
5951146d | 3396 | struct se_device *dev = cmd->se_dev; |
c66ac9db NB |
3397 | struct se_cmd *cmd_p, *cmd_tmp; |
3398 | int new_active_tasks = 0; | |
3399 | ||
e66ecd50 | 3400 | if (cmd->sam_task_attr == MSG_SIMPLE_TAG) { |
c66ac9db NB |
3401 | atomic_dec(&dev->simple_cmds); |
3402 | smp_mb__after_atomic_dec(); | |
3403 | dev->dev_cur_ordered_id++; | |
6708bb27 | 3404 | pr_debug("Incremented dev->dev_cur_ordered_id: %u for" |
c66ac9db NB |
3405 | " SIMPLE: %u\n", dev->dev_cur_ordered_id, |
3406 | cmd->se_ordered_id); | |
e66ecd50 | 3407 | } else if (cmd->sam_task_attr == MSG_HEAD_TAG) { |
c66ac9db NB |
3408 | atomic_dec(&dev->dev_hoq_count); |
3409 | smp_mb__after_atomic_dec(); | |
3410 | dev->dev_cur_ordered_id++; | |
6708bb27 | 3411 | pr_debug("Incremented dev_cur_ordered_id: %u for" |
c66ac9db NB |
3412 | " HEAD_OF_QUEUE: %u\n", dev->dev_cur_ordered_id, |
3413 | cmd->se_ordered_id); | |
e66ecd50 | 3414 | } else if (cmd->sam_task_attr == MSG_ORDERED_TAG) { |
c66ac9db | 3415 | spin_lock(&dev->ordered_cmd_lock); |
5951146d | 3416 | list_del(&cmd->se_ordered_node); |
c66ac9db NB |
3417 | atomic_dec(&dev->dev_ordered_sync); |
3418 | smp_mb__after_atomic_dec(); | |
3419 | spin_unlock(&dev->ordered_cmd_lock); | |
3420 | ||
3421 | dev->dev_cur_ordered_id++; | |
6708bb27 | 3422 | pr_debug("Incremented dev_cur_ordered_id: %u for ORDERED:" |
c66ac9db NB |
3423 | " %u\n", dev->dev_cur_ordered_id, cmd->se_ordered_id); |
3424 | } | |
3425 | /* | |
3426 | * Process all commands up to the last received | |
3427 | * ORDERED task attribute which requires another blocking | |
3428 | * boundary | |
3429 | */ | |
3430 | spin_lock(&dev->delayed_cmd_lock); | |
3431 | list_for_each_entry_safe(cmd_p, cmd_tmp, | |
5951146d | 3432 | &dev->delayed_cmd_list, se_delayed_node) { |
c66ac9db | 3433 | |
5951146d | 3434 | list_del(&cmd_p->se_delayed_node); |
c66ac9db NB |
3435 | spin_unlock(&dev->delayed_cmd_lock); |
3436 | ||
6708bb27 | 3437 | pr_debug("Calling add_tasks() for" |
c66ac9db NB |
3438 | " cmd_p: 0x%02x Task Attr: 0x%02x" |
3439 | " Dormant -> Active, se_ordered_id: %u\n", | |
6708bb27 | 3440 | cmd_p->t_task_cdb[0], |
c66ac9db NB |
3441 | cmd_p->sam_task_attr, cmd_p->se_ordered_id); |
3442 | ||
3443 | transport_add_tasks_from_cmd(cmd_p); | |
3444 | new_active_tasks++; | |
3445 | ||
3446 | spin_lock(&dev->delayed_cmd_lock); | |
e66ecd50 | 3447 | if (cmd_p->sam_task_attr == MSG_ORDERED_TAG) |
c66ac9db NB |
3448 | break; |
3449 | } | |
3450 | spin_unlock(&dev->delayed_cmd_lock); | |
3451 | /* | |
3452 | * If new tasks have become active, wake up the transport thread | |
3453 | * to do the processing of the Active tasks. | |
3454 | */ | |
3455 | if (new_active_tasks != 0) | |
e3d6f909 | 3456 | wake_up_interruptible(&dev->dev_queue_obj.thread_wq); |
c66ac9db NB |
3457 | } |
3458 | ||
07bde79a NB |
3459 | static int transport_complete_qf(struct se_cmd *cmd) |
3460 | { | |
3461 | int ret = 0; | |
3462 | ||
3463 | if (cmd->se_cmd_flags & SCF_TRANSPORT_TASK_SENSE) | |
3464 | return cmd->se_tfo->queue_status(cmd); | |
3465 | ||
3466 | switch (cmd->data_direction) { | |
3467 | case DMA_FROM_DEVICE: | |
3468 | ret = cmd->se_tfo->queue_data_in(cmd); | |
3469 | break; | |
3470 | case DMA_TO_DEVICE: | |
ec98f782 | 3471 | if (cmd->t_bidi_data_sg) { |
07bde79a NB |
3472 | ret = cmd->se_tfo->queue_data_in(cmd); |
3473 | if (ret < 0) | |
3474 | return ret; | |
3475 | } | |
3476 | /* Fall through for DMA_TO_DEVICE */ | |
3477 | case DMA_NONE: | |
3478 | ret = cmd->se_tfo->queue_status(cmd); | |
3479 | break; | |
3480 | default: | |
3481 | break; | |
3482 | } | |
3483 | ||
3484 | return ret; | |
3485 | } | |
3486 | ||
3487 | static void transport_handle_queue_full( | |
3488 | struct se_cmd *cmd, | |
3489 | struct se_device *dev, | |
3490 | int (*qf_callback)(struct se_cmd *)) | |
3491 | { | |
3492 | spin_lock_irq(&dev->qf_cmd_lock); | |
3493 | cmd->se_cmd_flags |= SCF_EMULATE_QUEUE_FULL; | |
3494 | cmd->transport_qf_callback = qf_callback; | |
3495 | list_add_tail(&cmd->se_qf_node, &cmd->se_dev->qf_cmd_list); | |
3496 | atomic_inc(&dev->dev_qf_count); | |
3497 | smp_mb__after_atomic_inc(); | |
3498 | spin_unlock_irq(&cmd->se_dev->qf_cmd_lock); | |
3499 | ||
3500 | schedule_work(&cmd->se_dev->qf_work_queue); | |
3501 | } | |
3502 | ||
c66ac9db NB |
3503 | static void transport_generic_complete_ok(struct se_cmd *cmd) |
3504 | { | |
07bde79a | 3505 | int reason = 0, ret; |
c66ac9db NB |
3506 | /* |
3507 | * Check if we need to move delayed/dormant tasks from cmds on the | |
3508 | * delayed execution list after a HEAD_OF_QUEUE or ORDERED Task | |
3509 | * Attribute. | |
3510 | */ | |
5951146d | 3511 | if (cmd->se_dev->dev_task_attr_type == SAM_TASK_ATTR_EMULATED) |
c66ac9db | 3512 | transport_complete_task_attr(cmd); |
07bde79a NB |
3513 | /* |
3514 | * Check to schedule QUEUE_FULL work, or execute an existing | |
3515 | * cmd->transport_qf_callback() | |
3516 | */ | |
3517 | if (atomic_read(&cmd->se_dev->dev_qf_count) != 0) | |
3518 | schedule_work(&cmd->se_dev->qf_work_queue); | |
3519 | ||
3520 | if (cmd->transport_qf_callback) { | |
3521 | ret = cmd->transport_qf_callback(cmd); | |
3522 | if (ret < 0) | |
3523 | goto queue_full; | |
3524 | ||
3525 | cmd->transport_qf_callback = NULL; | |
3526 | goto done; | |
3527 | } | |
c66ac9db NB |
3528 | /* |
3529 | * Check if we need to retrieve a sense buffer from | |
3530 | * the struct se_cmd in question. | |
3531 | */ | |
3532 | if (cmd->se_cmd_flags & SCF_TRANSPORT_TASK_SENSE) { | |
3533 | if (transport_get_sense_data(cmd) < 0) | |
3534 | reason = TCM_NON_EXISTENT_LUN; | |
3535 | ||
3536 | /* | |
3537 | * Only set when an struct se_task->task_scsi_status returned | |
3538 | * a non GOOD status. | |
3539 | */ | |
3540 | if (cmd->scsi_status) { | |
07bde79a | 3541 | ret = transport_send_check_condition_and_sense( |
c66ac9db | 3542 | cmd, reason, 1); |
07bde79a NB |
3543 | if (ret == -EAGAIN) |
3544 | goto queue_full; | |
3545 | ||
c66ac9db NB |
3546 | transport_lun_remove_cmd(cmd); |
3547 | transport_cmd_check_stop_to_fabric(cmd); | |
3548 | return; | |
3549 | } | |
3550 | } | |
3551 | /* | |
25985edc | 3552 | * Check for a callback, used by amongst other things |
c66ac9db NB |
3553 | * XDWRITE_READ_10 emulation. |
3554 | */ | |
3555 | if (cmd->transport_complete_callback) | |
3556 | cmd->transport_complete_callback(cmd); | |
3557 | ||
3558 | switch (cmd->data_direction) { | |
3559 | case DMA_FROM_DEVICE: | |
3560 | spin_lock(&cmd->se_lun->lun_sep_lock); | |
e3d6f909 AG |
3561 | if (cmd->se_lun->lun_sep) { |
3562 | cmd->se_lun->lun_sep->sep_stats.tx_data_octets += | |
c66ac9db NB |
3563 | cmd->data_length; |
3564 | } | |
3565 | spin_unlock(&cmd->se_lun->lun_sep_lock); | |
c66ac9db | 3566 | |
07bde79a NB |
3567 | ret = cmd->se_tfo->queue_data_in(cmd); |
3568 | if (ret == -EAGAIN) | |
3569 | goto queue_full; | |
c66ac9db NB |
3570 | break; |
3571 | case DMA_TO_DEVICE: | |
3572 | spin_lock(&cmd->se_lun->lun_sep_lock); | |
e3d6f909 AG |
3573 | if (cmd->se_lun->lun_sep) { |
3574 | cmd->se_lun->lun_sep->sep_stats.rx_data_octets += | |
c66ac9db NB |
3575 | cmd->data_length; |
3576 | } | |
3577 | spin_unlock(&cmd->se_lun->lun_sep_lock); | |
3578 | /* | |
3579 | * Check if we need to send READ payload for BIDI-COMMAND | |
3580 | */ | |
ec98f782 | 3581 | if (cmd->t_bidi_data_sg) { |
c66ac9db | 3582 | spin_lock(&cmd->se_lun->lun_sep_lock); |
e3d6f909 AG |
3583 | if (cmd->se_lun->lun_sep) { |
3584 | cmd->se_lun->lun_sep->sep_stats.tx_data_octets += | |
c66ac9db NB |
3585 | cmd->data_length; |
3586 | } | |
3587 | spin_unlock(&cmd->se_lun->lun_sep_lock); | |
07bde79a NB |
3588 | ret = cmd->se_tfo->queue_data_in(cmd); |
3589 | if (ret == -EAGAIN) | |
3590 | goto queue_full; | |
c66ac9db NB |
3591 | break; |
3592 | } | |
3593 | /* Fall through for DMA_TO_DEVICE */ | |
3594 | case DMA_NONE: | |
07bde79a NB |
3595 | ret = cmd->se_tfo->queue_status(cmd); |
3596 | if (ret == -EAGAIN) | |
3597 | goto queue_full; | |
c66ac9db NB |
3598 | break; |
3599 | default: | |
3600 | break; | |
3601 | } | |
3602 | ||
07bde79a | 3603 | done: |
c66ac9db NB |
3604 | transport_lun_remove_cmd(cmd); |
3605 | transport_cmd_check_stop_to_fabric(cmd); | |
07bde79a NB |
3606 | return; |
3607 | ||
3608 | queue_full: | |
6708bb27 | 3609 | pr_debug("Handling complete_ok QUEUE_FULL: se_cmd: %p," |
07bde79a NB |
3610 | " data_direction: %d\n", cmd, cmd->data_direction); |
3611 | transport_handle_queue_full(cmd, cmd->se_dev, transport_complete_qf); | |
c66ac9db NB |
3612 | } |
3613 | ||
3614 | static void transport_free_dev_tasks(struct se_cmd *cmd) | |
3615 | { | |
3616 | struct se_task *task, *task_tmp; | |
3617 | unsigned long flags; | |
3618 | ||
a1d8b49a | 3619 | spin_lock_irqsave(&cmd->t_state_lock, flags); |
c66ac9db | 3620 | list_for_each_entry_safe(task, task_tmp, |
a1d8b49a | 3621 | &cmd->t_task_list, t_list) { |
c66ac9db NB |
3622 | if (atomic_read(&task->task_active)) |
3623 | continue; | |
3624 | ||
3625 | kfree(task->task_sg_bidi); | |
3626 | kfree(task->task_sg); | |
3627 | ||
3628 | list_del(&task->t_list); | |
3629 | ||
a1d8b49a | 3630 | spin_unlock_irqrestore(&cmd->t_state_lock, flags); |
c66ac9db | 3631 | if (task->se_dev) |
e3d6f909 | 3632 | task->se_dev->transport->free_task(task); |
c66ac9db | 3633 | else |
6708bb27 | 3634 | pr_err("task[%u] - task->se_dev is NULL\n", |
c66ac9db | 3635 | task->task_no); |
a1d8b49a | 3636 | spin_lock_irqsave(&cmd->t_state_lock, flags); |
c66ac9db | 3637 | } |
a1d8b49a | 3638 | spin_unlock_irqrestore(&cmd->t_state_lock, flags); |
c66ac9db NB |
3639 | } |
3640 | ||
6708bb27 | 3641 | static inline void transport_free_sgl(struct scatterlist *sgl, int nents) |
c66ac9db | 3642 | { |
ec98f782 | 3643 | struct scatterlist *sg; |
ec98f782 | 3644 | int count; |
c66ac9db | 3645 | |
6708bb27 AG |
3646 | for_each_sg(sgl, sg, nents, count) |
3647 | __free_page(sg_page(sg)); | |
c66ac9db | 3648 | |
6708bb27 AG |
3649 | kfree(sgl); |
3650 | } | |
c66ac9db | 3651 | |
6708bb27 AG |
3652 | static inline void transport_free_pages(struct se_cmd *cmd) |
3653 | { | |
3654 | if (cmd->se_cmd_flags & SCF_PASSTHROUGH_SG_TO_MEM_NOALLOC) | |
3655 | return; | |
3656 | ||
3657 | transport_free_sgl(cmd->t_data_sg, cmd->t_data_nents); | |
ec98f782 AG |
3658 | cmd->t_data_sg = NULL; |
3659 | cmd->t_data_nents = 0; | |
c66ac9db | 3660 | |
6708bb27 | 3661 | transport_free_sgl(cmd->t_bidi_data_sg, cmd->t_bidi_data_nents); |
ec98f782 AG |
3662 | cmd->t_bidi_data_sg = NULL; |
3663 | cmd->t_bidi_data_nents = 0; | |
c66ac9db NB |
3664 | } |
3665 | ||
d3df7825 CH |
3666 | /** |
3667 | * transport_put_cmd - release a reference to a command | |
3668 | * @cmd: command to release | |
3669 | * | |
3670 | * This routine releases our reference to the command and frees it if possible. | |
3671 | */ | |
39c05f32 | 3672 | static void transport_put_cmd(struct se_cmd *cmd) |
c66ac9db NB |
3673 | { |
3674 | unsigned long flags; | |
4911e3cc | 3675 | int free_tasks = 0; |
c66ac9db | 3676 | |
a1d8b49a | 3677 | spin_lock_irqsave(&cmd->t_state_lock, flags); |
4911e3cc CH |
3678 | if (atomic_read(&cmd->t_fe_count)) { |
3679 | if (!atomic_dec_and_test(&cmd->t_fe_count)) | |
3680 | goto out_busy; | |
3681 | } | |
3682 | ||
3683 | if (atomic_read(&cmd->t_se_count)) { | |
3684 | if (!atomic_dec_and_test(&cmd->t_se_count)) | |
3685 | goto out_busy; | |
3686 | } | |
3687 | ||
3688 | if (atomic_read(&cmd->transport_dev_active)) { | |
3689 | atomic_set(&cmd->transport_dev_active, 0); | |
3690 | transport_all_task_dev_remove_state(cmd); | |
3691 | free_tasks = 1; | |
c66ac9db | 3692 | } |
a1d8b49a | 3693 | spin_unlock_irqrestore(&cmd->t_state_lock, flags); |
c66ac9db | 3694 | |
4911e3cc CH |
3695 | if (free_tasks != 0) |
3696 | transport_free_dev_tasks(cmd); | |
d3df7825 | 3697 | |
c66ac9db | 3698 | transport_free_pages(cmd); |
31afc39c | 3699 | transport_release_cmd(cmd); |
39c05f32 | 3700 | return; |
4911e3cc CH |
3701 | out_busy: |
3702 | spin_unlock_irqrestore(&cmd->t_state_lock, flags); | |
c66ac9db NB |
3703 | } |
3704 | ||
c66ac9db | 3705 | /* |
ec98f782 AG |
3706 | * transport_generic_map_mem_to_cmd - Use fabric-alloced pages instead of |
3707 | * allocating in the core. | |
c66ac9db NB |
3708 | * @cmd: Associated se_cmd descriptor |
3709 | * @mem: SGL style memory for TCM WRITE / READ | |
3710 | * @sg_mem_num: Number of SGL elements | |
3711 | * @mem_bidi_in: SGL style memory for TCM BIDI READ | |
3712 | * @sg_mem_bidi_num: Number of BIDI READ SGL elements | |
3713 | * | |
3714 | * Return: nonzero return cmd was rejected for -ENOMEM or inproper usage | |
3715 | * of parameters. | |
3716 | */ | |
3717 | int transport_generic_map_mem_to_cmd( | |
3718 | struct se_cmd *cmd, | |
5951146d AG |
3719 | struct scatterlist *sgl, |
3720 | u32 sgl_count, | |
3721 | struct scatterlist *sgl_bidi, | |
3722 | u32 sgl_bidi_count) | |
c66ac9db | 3723 | { |
5951146d | 3724 | if (!sgl || !sgl_count) |
c66ac9db | 3725 | return 0; |
c66ac9db | 3726 | |
c66ac9db NB |
3727 | if ((cmd->se_cmd_flags & SCF_SCSI_DATA_SG_IO_CDB) || |
3728 | (cmd->se_cmd_flags & SCF_SCSI_CONTROL_SG_IO_CDB)) { | |
c66ac9db | 3729 | |
ec98f782 AG |
3730 | cmd->t_data_sg = sgl; |
3731 | cmd->t_data_nents = sgl_count; | |
c66ac9db | 3732 | |
ec98f782 AG |
3733 | if (sgl_bidi && sgl_bidi_count) { |
3734 | cmd->t_bidi_data_sg = sgl_bidi; | |
3735 | cmd->t_bidi_data_nents = sgl_bidi_count; | |
c66ac9db NB |
3736 | } |
3737 | cmd->se_cmd_flags |= SCF_PASSTHROUGH_SG_TO_MEM_NOALLOC; | |
c66ac9db NB |
3738 | } |
3739 | ||
3740 | return 0; | |
3741 | } | |
3742 | EXPORT_SYMBOL(transport_generic_map_mem_to_cmd); | |
3743 | ||
c66ac9db NB |
3744 | static int transport_new_cmd_obj(struct se_cmd *cmd) |
3745 | { | |
5951146d | 3746 | struct se_device *dev = cmd->se_dev; |
01cde4d5 | 3747 | int set_counts = 1, rc, task_cdbs; |
c66ac9db | 3748 | |
ec98f782 AG |
3749 | /* |
3750 | * Setup any BIDI READ tasks and memory from | |
3751 | * cmd->t_mem_bidi_list so the READ struct se_tasks | |
3752 | * are queued first for the non pSCSI passthrough case. | |
3753 | */ | |
3754 | if (cmd->t_bidi_data_sg && | |
3755 | (dev->transport->transport_type != TRANSPORT_PLUGIN_PHBA_PDEV)) { | |
3756 | rc = transport_allocate_tasks(cmd, | |
3757 | cmd->t_task_lba, | |
3758 | DMA_FROM_DEVICE, | |
3759 | cmd->t_bidi_data_sg, | |
3760 | cmd->t_bidi_data_nents); | |
6708bb27 | 3761 | if (rc <= 0) { |
c66ac9db NB |
3762 | cmd->se_cmd_flags |= SCF_SCSI_CDB_EXCEPTION; |
3763 | cmd->scsi_sense_reason = | |
ec98f782 | 3764 | TCM_LOGICAL_UNIT_COMMUNICATION_FAILURE; |
01cde4d5 | 3765 | return -EINVAL; |
c66ac9db | 3766 | } |
ec98f782 AG |
3767 | atomic_inc(&cmd->t_fe_count); |
3768 | atomic_inc(&cmd->t_se_count); | |
3769 | set_counts = 0; | |
3770 | } | |
3771 | /* | |
3772 | * Setup the tasks and memory from cmd->t_mem_list | |
3773 | * Note for BIDI transfers this will contain the WRITE payload | |
3774 | */ | |
3775 | task_cdbs = transport_allocate_tasks(cmd, | |
3776 | cmd->t_task_lba, | |
3777 | cmd->data_direction, | |
3778 | cmd->t_data_sg, | |
3779 | cmd->t_data_nents); | |
6708bb27 | 3780 | if (task_cdbs <= 0) { |
ec98f782 AG |
3781 | cmd->se_cmd_flags |= SCF_SCSI_CDB_EXCEPTION; |
3782 | cmd->scsi_sense_reason = | |
3783 | TCM_LOGICAL_UNIT_COMMUNICATION_FAILURE; | |
01cde4d5 | 3784 | return -EINVAL; |
ec98f782 | 3785 | } |
c66ac9db | 3786 | |
ec98f782 AG |
3787 | if (set_counts) { |
3788 | atomic_inc(&cmd->t_fe_count); | |
3789 | atomic_inc(&cmd->t_se_count); | |
c66ac9db NB |
3790 | } |
3791 | ||
ec98f782 AG |
3792 | cmd->t_task_list_num = task_cdbs; |
3793 | ||
a1d8b49a AG |
3794 | atomic_set(&cmd->t_task_cdbs_left, task_cdbs); |
3795 | atomic_set(&cmd->t_task_cdbs_ex_left, task_cdbs); | |
3796 | atomic_set(&cmd->t_task_cdbs_timeout_left, task_cdbs); | |
c66ac9db NB |
3797 | return 0; |
3798 | } | |
3799 | ||
05d1c7c0 AG |
3800 | void *transport_kmap_first_data_page(struct se_cmd *cmd) |
3801 | { | |
ec98f782 | 3802 | struct scatterlist *sg = cmd->t_data_sg; |
05d1c7c0 | 3803 | |
ec98f782 | 3804 | BUG_ON(!sg); |
05d1c7c0 | 3805 | /* |
ec98f782 AG |
3806 | * We need to take into account a possible offset here for fabrics like |
3807 | * tcm_loop who may be using a contig buffer from the SCSI midlayer for | |
3808 | * control CDBs passed as SGLs via transport_generic_map_mem_to_cmd() | |
05d1c7c0 | 3809 | */ |
ec98f782 | 3810 | return kmap(sg_page(sg)) + sg->offset; |
05d1c7c0 AG |
3811 | } |
3812 | EXPORT_SYMBOL(transport_kmap_first_data_page); | |
3813 | ||
3814 | void transport_kunmap_first_data_page(struct se_cmd *cmd) | |
3815 | { | |
ec98f782 | 3816 | kunmap(sg_page(cmd->t_data_sg)); |
05d1c7c0 AG |
3817 | } |
3818 | EXPORT_SYMBOL(transport_kunmap_first_data_page); | |
3819 | ||
c66ac9db | 3820 | static int |
05d1c7c0 | 3821 | transport_generic_get_mem(struct se_cmd *cmd) |
c66ac9db | 3822 | { |
ec98f782 AG |
3823 | u32 length = cmd->data_length; |
3824 | unsigned int nents; | |
3825 | struct page *page; | |
3826 | int i = 0; | |
c66ac9db | 3827 | |
ec98f782 AG |
3828 | nents = DIV_ROUND_UP(length, PAGE_SIZE); |
3829 | cmd->t_data_sg = kmalloc(sizeof(struct scatterlist) * nents, GFP_KERNEL); | |
3830 | if (!cmd->t_data_sg) | |
3831 | return -ENOMEM; | |
c66ac9db | 3832 | |
ec98f782 AG |
3833 | cmd->t_data_nents = nents; |
3834 | sg_init_table(cmd->t_data_sg, nents); | |
c66ac9db | 3835 | |
ec98f782 AG |
3836 | while (length) { |
3837 | u32 page_len = min_t(u32, length, PAGE_SIZE); | |
3838 | page = alloc_page(GFP_KERNEL | __GFP_ZERO); | |
3839 | if (!page) | |
3840 | goto out; | |
c66ac9db | 3841 | |
ec98f782 AG |
3842 | sg_set_page(&cmd->t_data_sg[i], page, page_len, 0); |
3843 | length -= page_len; | |
3844 | i++; | |
c66ac9db | 3845 | } |
c66ac9db | 3846 | return 0; |
c66ac9db | 3847 | |
ec98f782 AG |
3848 | out: |
3849 | while (i >= 0) { | |
3850 | __free_page(sg_page(&cmd->t_data_sg[i])); | |
3851 | i--; | |
c66ac9db | 3852 | } |
ec98f782 AG |
3853 | kfree(cmd->t_data_sg); |
3854 | cmd->t_data_sg = NULL; | |
3855 | return -ENOMEM; | |
c66ac9db NB |
3856 | } |
3857 | ||
a1d8b49a AG |
3858 | /* Reduce sectors if they are too long for the device */ |
3859 | static inline sector_t transport_limit_task_sectors( | |
c66ac9db NB |
3860 | struct se_device *dev, |
3861 | unsigned long long lba, | |
a1d8b49a | 3862 | sector_t sectors) |
c66ac9db | 3863 | { |
a1d8b49a | 3864 | sectors = min_t(sector_t, sectors, dev->se_sub_dev->se_dev_attrib.max_sectors); |
c66ac9db | 3865 | |
a1d8b49a AG |
3866 | if (dev->transport->get_device_type(dev) == TYPE_DISK) |
3867 | if ((lba + sectors) > transport_dev_end_lba(dev)) | |
3868 | sectors = ((transport_dev_end_lba(dev) - lba) + 1); | |
c66ac9db | 3869 | |
a1d8b49a | 3870 | return sectors; |
c66ac9db NB |
3871 | } |
3872 | ||
c66ac9db NB |
3873 | |
3874 | /* | |
3875 | * This function can be used by HW target mode drivers to create a linked | |
3876 | * scatterlist from all contiguously allocated struct se_task->task_sg[]. | |
3877 | * This is intended to be called during the completion path by TCM Core | |
3878 | * when struct target_core_fabric_ops->check_task_sg_chaining is enabled. | |
3879 | */ | |
3880 | void transport_do_task_sg_chain(struct se_cmd *cmd) | |
3881 | { | |
ec98f782 AG |
3882 | struct scatterlist *sg_first = NULL; |
3883 | struct scatterlist *sg_prev = NULL; | |
3884 | int sg_prev_nents = 0; | |
3885 | struct scatterlist *sg; | |
c66ac9db | 3886 | struct se_task *task; |
ec98f782 | 3887 | u32 chained_nents = 0; |
c66ac9db NB |
3888 | int i; |
3889 | ||
ec98f782 AG |
3890 | BUG_ON(!cmd->se_tfo->task_sg_chaining); |
3891 | ||
c66ac9db NB |
3892 | /* |
3893 | * Walk the struct se_task list and setup scatterlist chains | |
a1d8b49a | 3894 | * for each contiguously allocated struct se_task->task_sg[]. |
c66ac9db | 3895 | */ |
a1d8b49a | 3896 | list_for_each_entry(task, &cmd->t_task_list, t_list) { |
ec98f782 | 3897 | if (!task->task_sg) |
c66ac9db NB |
3898 | continue; |
3899 | ||
ec98f782 AG |
3900 | if (!sg_first) { |
3901 | sg_first = task->task_sg; | |
6708bb27 | 3902 | chained_nents = task->task_sg_nents; |
97868c89 | 3903 | } else { |
ec98f782 | 3904 | sg_chain(sg_prev, sg_prev_nents, task->task_sg); |
6708bb27 | 3905 | chained_nents += task->task_sg_nents; |
97868c89 | 3906 | } |
c3c74c7a NB |
3907 | /* |
3908 | * For the padded tasks, use the extra SGL vector allocated | |
3909 | * in transport_allocate_data_tasks() for the sg_prev_nents | |
3910 | * offset into sg_chain() above.. The last task of a | |
3911 | * multi-task list, or a single task will not have | |
3912 | * task->task_sg_padded set.. | |
3913 | */ | |
3914 | if (task->task_padded_sg) | |
3915 | sg_prev_nents = (task->task_sg_nents + 1); | |
3916 | else | |
3917 | sg_prev_nents = task->task_sg_nents; | |
ec98f782 AG |
3918 | |
3919 | sg_prev = task->task_sg; | |
c66ac9db NB |
3920 | } |
3921 | /* | |
3922 | * Setup the starting pointer and total t_tasks_sg_linked_no including | |
3923 | * padding SGs for linking and to mark the end. | |
3924 | */ | |
a1d8b49a | 3925 | cmd->t_tasks_sg_chained = sg_first; |
ec98f782 | 3926 | cmd->t_tasks_sg_chained_no = chained_nents; |
c66ac9db | 3927 | |
6708bb27 | 3928 | pr_debug("Setup cmd: %p cmd->t_tasks_sg_chained: %p and" |
a1d8b49a AG |
3929 | " t_tasks_sg_chained_no: %u\n", cmd, cmd->t_tasks_sg_chained, |
3930 | cmd->t_tasks_sg_chained_no); | |
c66ac9db | 3931 | |
a1d8b49a AG |
3932 | for_each_sg(cmd->t_tasks_sg_chained, sg, |
3933 | cmd->t_tasks_sg_chained_no, i) { | |
c66ac9db | 3934 | |
6708bb27 | 3935 | pr_debug("SG[%d]: %p page: %p length: %d offset: %d\n", |
5951146d | 3936 | i, sg, sg_page(sg), sg->length, sg->offset); |
c66ac9db | 3937 | if (sg_is_chain(sg)) |
6708bb27 | 3938 | pr_debug("SG: %p sg_is_chain=1\n", sg); |
c66ac9db | 3939 | if (sg_is_last(sg)) |
6708bb27 | 3940 | pr_debug("SG: %p sg_is_last=1\n", sg); |
c66ac9db | 3941 | } |
c66ac9db NB |
3942 | } |
3943 | EXPORT_SYMBOL(transport_do_task_sg_chain); | |
3944 | ||
a1d8b49a AG |
3945 | /* |
3946 | * Break up cmd into chunks transport can handle | |
3947 | */ | |
ec98f782 | 3948 | static int transport_allocate_data_tasks( |
c66ac9db NB |
3949 | struct se_cmd *cmd, |
3950 | unsigned long long lba, | |
c66ac9db | 3951 | enum dma_data_direction data_direction, |
ec98f782 AG |
3952 | struct scatterlist *sgl, |
3953 | unsigned int sgl_nents) | |
c66ac9db NB |
3954 | { |
3955 | unsigned char *cdb = NULL; | |
3956 | struct se_task *task; | |
5951146d | 3957 | struct se_device *dev = cmd->se_dev; |
ec98f782 | 3958 | unsigned long flags; |
a3eedc22 | 3959 | int task_count, i; |
277c5f27 | 3960 | sector_t sectors, dev_max_sectors = dev->se_sub_dev->se_dev_attrib.max_sectors; |
ec98f782 AG |
3961 | u32 sector_size = dev->se_sub_dev->se_dev_attrib.block_size; |
3962 | struct scatterlist *sg; | |
3963 | struct scatterlist *cmd_sg; | |
a1d8b49a | 3964 | |
ec98f782 AG |
3965 | WARN_ON(cmd->data_length % sector_size); |
3966 | sectors = DIV_ROUND_UP(cmd->data_length, sector_size); | |
277c5f27 NB |
3967 | task_count = DIV_ROUND_UP_SECTOR_T(sectors, dev_max_sectors); |
3968 | ||
ec98f782 AG |
3969 | cmd_sg = sgl; |
3970 | for (i = 0; i < task_count; i++) { | |
c3c74c7a | 3971 | unsigned int task_size, task_sg_nents_padded; |
ec98f782 | 3972 | int count; |
a1d8b49a | 3973 | |
c66ac9db | 3974 | task = transport_generic_get_task(cmd, data_direction); |
a1d8b49a | 3975 | if (!task) |
ec98f782 | 3976 | return -ENOMEM; |
c66ac9db | 3977 | |
c66ac9db | 3978 | task->task_lba = lba; |
ec98f782 AG |
3979 | task->task_sectors = min(sectors, dev_max_sectors); |
3980 | task->task_size = task->task_sectors * sector_size; | |
c66ac9db | 3981 | |
e3d6f909 | 3982 | cdb = dev->transport->get_cdb(task); |
a1d8b49a AG |
3983 | BUG_ON(!cdb); |
3984 | ||
3985 | memcpy(cdb, cmd->t_task_cdb, | |
3986 | scsi_command_size(cmd->t_task_cdb)); | |
3987 | ||
3988 | /* Update new cdb with updated lba/sectors */ | |
3a867205 | 3989 | cmd->transport_split_cdb(task->task_lba, task->task_sectors, cdb); |
525a48a2 NB |
3990 | /* |
3991 | * This now assumes that passed sg_ents are in PAGE_SIZE chunks | |
3992 | * in order to calculate the number per task SGL entries | |
3993 | */ | |
3994 | task->task_sg_nents = DIV_ROUND_UP(task->task_size, PAGE_SIZE); | |
c66ac9db | 3995 | /* |
ec98f782 AG |
3996 | * Check if the fabric module driver is requesting that all |
3997 | * struct se_task->task_sg[] be chained together.. If so, | |
3998 | * then allocate an extra padding SG entry for linking and | |
c3c74c7a NB |
3999 | * marking the end of the chained SGL for every task except |
4000 | * the last one for (task_count > 1) operation, or skipping | |
4001 | * the extra padding for the (task_count == 1) case. | |
c66ac9db | 4002 | */ |
c3c74c7a NB |
4003 | if (cmd->se_tfo->task_sg_chaining && (i < (task_count - 1))) { |
4004 | task_sg_nents_padded = (task->task_sg_nents + 1); | |
ec98f782 | 4005 | task->task_padded_sg = 1; |
c3c74c7a NB |
4006 | } else |
4007 | task_sg_nents_padded = task->task_sg_nents; | |
c66ac9db | 4008 | |
1d20bb61 | 4009 | task->task_sg = kmalloc(sizeof(struct scatterlist) * |
c3c74c7a | 4010 | task_sg_nents_padded, GFP_KERNEL); |
ec98f782 AG |
4011 | if (!task->task_sg) { |
4012 | cmd->se_dev->transport->free_task(task); | |
4013 | return -ENOMEM; | |
4014 | } | |
4015 | ||
c3c74c7a | 4016 | sg_init_table(task->task_sg, task_sg_nents_padded); |
c66ac9db | 4017 | |
ec98f782 AG |
4018 | task_size = task->task_size; |
4019 | ||
4020 | /* Build new sgl, only up to task_size */ | |
6708bb27 | 4021 | for_each_sg(task->task_sg, sg, task->task_sg_nents, count) { |
ec98f782 AG |
4022 | if (cmd_sg->length > task_size) |
4023 | break; | |
4024 | ||
4025 | *sg = *cmd_sg; | |
4026 | task_size -= cmd_sg->length; | |
4027 | cmd_sg = sg_next(cmd_sg); | |
c66ac9db | 4028 | } |
c66ac9db | 4029 | |
ec98f782 AG |
4030 | lba += task->task_sectors; |
4031 | sectors -= task->task_sectors; | |
c66ac9db | 4032 | |
ec98f782 AG |
4033 | spin_lock_irqsave(&cmd->t_state_lock, flags); |
4034 | list_add_tail(&task->t_list, &cmd->t_task_list); | |
4035 | spin_unlock_irqrestore(&cmd->t_state_lock, flags); | |
c66ac9db NB |
4036 | } |
4037 | ||
ec98f782 | 4038 | return task_count; |
c66ac9db NB |
4039 | } |
4040 | ||
4041 | static int | |
ec98f782 | 4042 | transport_allocate_control_task(struct se_cmd *cmd) |
c66ac9db | 4043 | { |
5951146d | 4044 | struct se_device *dev = cmd->se_dev; |
c66ac9db NB |
4045 | unsigned char *cdb; |
4046 | struct se_task *task; | |
ec98f782 | 4047 | unsigned long flags; |
c66ac9db NB |
4048 | |
4049 | task = transport_generic_get_task(cmd, cmd->data_direction); | |
4050 | if (!task) | |
ec98f782 | 4051 | return -ENOMEM; |
c66ac9db | 4052 | |
e3d6f909 | 4053 | cdb = dev->transport->get_cdb(task); |
a1d8b49a AG |
4054 | BUG_ON(!cdb); |
4055 | memcpy(cdb, cmd->t_task_cdb, | |
4056 | scsi_command_size(cmd->t_task_cdb)); | |
c66ac9db | 4057 | |
ec98f782 AG |
4058 | task->task_sg = kmalloc(sizeof(struct scatterlist) * cmd->t_data_nents, |
4059 | GFP_KERNEL); | |
4060 | if (!task->task_sg) { | |
4061 | cmd->se_dev->transport->free_task(task); | |
4062 | return -ENOMEM; | |
4063 | } | |
4064 | ||
4065 | memcpy(task->task_sg, cmd->t_data_sg, | |
4066 | sizeof(struct scatterlist) * cmd->t_data_nents); | |
c66ac9db | 4067 | task->task_size = cmd->data_length; |
6708bb27 | 4068 | task->task_sg_nents = cmd->t_data_nents; |
c66ac9db | 4069 | |
ec98f782 AG |
4070 | spin_lock_irqsave(&cmd->t_state_lock, flags); |
4071 | list_add_tail(&task->t_list, &cmd->t_task_list); | |
4072 | spin_unlock_irqrestore(&cmd->t_state_lock, flags); | |
c66ac9db | 4073 | |
6708bb27 | 4074 | /* Success! Return number of tasks allocated */ |
a3eedc22 | 4075 | return 1; |
ec98f782 AG |
4076 | } |
4077 | ||
4078 | static u32 transport_allocate_tasks( | |
4079 | struct se_cmd *cmd, | |
4080 | unsigned long long lba, | |
4081 | enum dma_data_direction data_direction, | |
4082 | struct scatterlist *sgl, | |
4083 | unsigned int sgl_nents) | |
4084 | { | |
01cde4d5 NB |
4085 | if (cmd->se_cmd_flags & SCF_SCSI_DATA_SG_IO_CDB) { |
4086 | if (transport_cmd_get_valid_sectors(cmd) < 0) | |
4087 | return -EINVAL; | |
4088 | ||
ec98f782 AG |
4089 | return transport_allocate_data_tasks(cmd, lba, data_direction, |
4090 | sgl, sgl_nents); | |
01cde4d5 | 4091 | } else |
6708bb27 AG |
4092 | return transport_allocate_control_task(cmd); |
4093 | ||
c66ac9db NB |
4094 | } |
4095 | ||
ec98f782 | 4096 | |
c66ac9db NB |
4097 | /* transport_generic_new_cmd(): Called from transport_processing_thread() |
4098 | * | |
4099 | * Allocate storage transport resources from a set of values predefined | |
4100 | * by transport_generic_cmd_sequencer() from the iSCSI Target RX process. | |
4101 | * Any non zero return here is treated as an "out of resource' op here. | |
4102 | */ | |
4103 | /* | |
4104 | * Generate struct se_task(s) and/or their payloads for this CDB. | |
4105 | */ | |
a1d8b49a | 4106 | int transport_generic_new_cmd(struct se_cmd *cmd) |
c66ac9db | 4107 | { |
c66ac9db NB |
4108 | int ret = 0; |
4109 | ||
4110 | /* | |
4111 | * Determine is the TCM fabric module has already allocated physical | |
4112 | * memory, and is directly calling transport_generic_map_mem_to_cmd() | |
ec98f782 | 4113 | * beforehand. |
c66ac9db | 4114 | */ |
ec98f782 AG |
4115 | if (!(cmd->se_cmd_flags & SCF_PASSTHROUGH_SG_TO_MEM_NOALLOC) && |
4116 | cmd->data_length) { | |
05d1c7c0 | 4117 | ret = transport_generic_get_mem(cmd); |
c66ac9db NB |
4118 | if (ret < 0) |
4119 | return ret; | |
4120 | } | |
1d20bb61 NB |
4121 | /* |
4122 | * Call transport_new_cmd_obj() to invoke transport_allocate_tasks() for | |
4123 | * control or data CDB types, and perform the map to backend subsystem | |
4124 | * code from SGL memory allocated here by transport_generic_get_mem(), or | |
4125 | * via pre-existing SGL memory setup explictly by fabric module code with | |
4126 | * transport_generic_map_mem_to_cmd(). | |
4127 | */ | |
c66ac9db NB |
4128 | ret = transport_new_cmd_obj(cmd); |
4129 | if (ret < 0) | |
4130 | return ret; | |
c66ac9db | 4131 | /* |
a1d8b49a | 4132 | * For WRITEs, let the fabric know its buffer is ready.. |
c66ac9db NB |
4133 | * This WRITE struct se_cmd (and all of its associated struct se_task's) |
4134 | * will be added to the struct se_device execution queue after its WRITE | |
4135 | * data has arrived. (ie: It gets handled by the transport processing | |
4136 | * thread a second time) | |
4137 | */ | |
4138 | if (cmd->data_direction == DMA_TO_DEVICE) { | |
4139 | transport_add_tasks_to_state_queue(cmd); | |
4140 | return transport_generic_write_pending(cmd); | |
4141 | } | |
4142 | /* | |
4143 | * Everything else but a WRITE, add the struct se_cmd's struct se_task's | |
4144 | * to the execution queue. | |
4145 | */ | |
4146 | transport_execute_tasks(cmd); | |
4147 | return 0; | |
4148 | } | |
a1d8b49a | 4149 | EXPORT_SYMBOL(transport_generic_new_cmd); |
c66ac9db NB |
4150 | |
4151 | /* transport_generic_process_write(): | |
4152 | * | |
4153 | * | |
4154 | */ | |
4155 | void transport_generic_process_write(struct se_cmd *cmd) | |
4156 | { | |
c66ac9db NB |
4157 | transport_execute_tasks(cmd); |
4158 | } | |
4159 | EXPORT_SYMBOL(transport_generic_process_write); | |
4160 | ||
07bde79a NB |
4161 | static int transport_write_pending_qf(struct se_cmd *cmd) |
4162 | { | |
4163 | return cmd->se_tfo->write_pending(cmd); | |
4164 | } | |
4165 | ||
c66ac9db NB |
4166 | /* transport_generic_write_pending(): |
4167 | * | |
4168 | * | |
4169 | */ | |
4170 | static int transport_generic_write_pending(struct se_cmd *cmd) | |
4171 | { | |
4172 | unsigned long flags; | |
4173 | int ret; | |
4174 | ||
a1d8b49a | 4175 | spin_lock_irqsave(&cmd->t_state_lock, flags); |
c66ac9db | 4176 | cmd->t_state = TRANSPORT_WRITE_PENDING; |
a1d8b49a | 4177 | spin_unlock_irqrestore(&cmd->t_state_lock, flags); |
07bde79a NB |
4178 | |
4179 | if (cmd->transport_qf_callback) { | |
4180 | ret = cmd->transport_qf_callback(cmd); | |
4181 | if (ret == -EAGAIN) | |
4182 | goto queue_full; | |
4183 | else if (ret < 0) | |
4184 | return ret; | |
4185 | ||
4186 | cmd->transport_qf_callback = NULL; | |
4187 | return 0; | |
4188 | } | |
05d1c7c0 | 4189 | |
c66ac9db NB |
4190 | /* |
4191 | * Clear the se_cmd for WRITE_PENDING status in order to set | |
a1d8b49a | 4192 | * cmd->t_transport_active=0 so that transport_generic_handle_data |
c66ac9db | 4193 | * can be called from HW target mode interrupt code. This is safe |
e3d6f909 | 4194 | * to be called with transport_off=1 before the cmd->se_tfo->write_pending |
c66ac9db NB |
4195 | * because the se_cmd->se_lun pointer is not being cleared. |
4196 | */ | |
4197 | transport_cmd_check_stop(cmd, 1, 0); | |
4198 | ||
4199 | /* | |
4200 | * Call the fabric write_pending function here to let the | |
4201 | * frontend know that WRITE buffers are ready. | |
4202 | */ | |
e3d6f909 | 4203 | ret = cmd->se_tfo->write_pending(cmd); |
07bde79a NB |
4204 | if (ret == -EAGAIN) |
4205 | goto queue_full; | |
4206 | else if (ret < 0) | |
c66ac9db NB |
4207 | return ret; |
4208 | ||
4209 | return PYX_TRANSPORT_WRITE_PENDING; | |
07bde79a NB |
4210 | |
4211 | queue_full: | |
6708bb27 | 4212 | pr_debug("Handling write_pending QUEUE__FULL: se_cmd: %p\n", cmd); |
07bde79a NB |
4213 | cmd->t_state = TRANSPORT_COMPLETE_QF_WP; |
4214 | transport_handle_queue_full(cmd, cmd->se_dev, | |
4215 | transport_write_pending_qf); | |
4216 | return ret; | |
c66ac9db NB |
4217 | } |
4218 | ||
2dbc43d2 CH |
4219 | /** |
4220 | * transport_release_cmd - free a command | |
4221 | * @cmd: command to free | |
4222 | * | |
4223 | * This routine unconditionally frees a command, and reference counting | |
4224 | * or list removal must be done in the caller. | |
4225 | */ | |
35462975 | 4226 | void transport_release_cmd(struct se_cmd *cmd) |
c66ac9db | 4227 | { |
e3d6f909 | 4228 | BUG_ON(!cmd->se_tfo); |
c66ac9db | 4229 | |
2dbc43d2 CH |
4230 | if (cmd->se_tmr_req) |
4231 | core_tmr_release_req(cmd->se_tmr_req); | |
4232 | if (cmd->t_task_cdb != cmd->__t_task_cdb) | |
4233 | kfree(cmd->t_task_cdb); | |
35462975 | 4234 | cmd->se_tfo->release_cmd(cmd); |
c66ac9db | 4235 | } |
35462975 | 4236 | EXPORT_SYMBOL(transport_release_cmd); |
c66ac9db | 4237 | |
39c05f32 | 4238 | void transport_generic_free_cmd(struct se_cmd *cmd, int wait_for_tasks) |
c66ac9db | 4239 | { |
d14921d6 NB |
4240 | if (!(cmd->se_cmd_flags & SCF_SE_LUN_CMD)) { |
4241 | if (wait_for_tasks && cmd->se_tmr_req) | |
4242 | transport_wait_for_tasks(cmd); | |
4243 | ||
35462975 | 4244 | transport_release_cmd(cmd); |
d14921d6 NB |
4245 | } else { |
4246 | if (wait_for_tasks) | |
4247 | transport_wait_for_tasks(cmd); | |
4248 | ||
c66ac9db NB |
4249 | core_dec_lacl_count(cmd->se_sess->se_node_acl, cmd); |
4250 | ||
82f1c8a4 | 4251 | if (cmd->se_lun) |
c66ac9db | 4252 | transport_lun_remove_cmd(cmd); |
c66ac9db | 4253 | |
f4366772 NB |
4254 | transport_free_dev_tasks(cmd); |
4255 | ||
39c05f32 | 4256 | transport_put_cmd(cmd); |
c66ac9db NB |
4257 | } |
4258 | } | |
4259 | EXPORT_SYMBOL(transport_generic_free_cmd); | |
4260 | ||
c66ac9db NB |
4261 | /* transport_lun_wait_for_tasks(): |
4262 | * | |
4263 | * Called from ConfigFS context to stop the passed struct se_cmd to allow | |
4264 | * an struct se_lun to be successfully shutdown. | |
4265 | */ | |
4266 | static int transport_lun_wait_for_tasks(struct se_cmd *cmd, struct se_lun *lun) | |
4267 | { | |
4268 | unsigned long flags; | |
4269 | int ret; | |
4270 | /* | |
4271 | * If the frontend has already requested this struct se_cmd to | |
4272 | * be stopped, we can safely ignore this struct se_cmd. | |
4273 | */ | |
a1d8b49a AG |
4274 | spin_lock_irqsave(&cmd->t_state_lock, flags); |
4275 | if (atomic_read(&cmd->t_transport_stop)) { | |
4276 | atomic_set(&cmd->transport_lun_stop, 0); | |
6708bb27 | 4277 | pr_debug("ConfigFS ITT[0x%08x] - t_transport_stop ==" |
e3d6f909 | 4278 | " TRUE, skipping\n", cmd->se_tfo->get_task_tag(cmd)); |
a1d8b49a | 4279 | spin_unlock_irqrestore(&cmd->t_state_lock, flags); |
c66ac9db | 4280 | transport_cmd_check_stop(cmd, 1, 0); |
e3d6f909 | 4281 | return -EPERM; |
c66ac9db | 4282 | } |
a1d8b49a AG |
4283 | atomic_set(&cmd->transport_lun_fe_stop, 1); |
4284 | spin_unlock_irqrestore(&cmd->t_state_lock, flags); | |
c66ac9db | 4285 | |
5951146d | 4286 | wake_up_interruptible(&cmd->se_dev->dev_queue_obj.thread_wq); |
c66ac9db NB |
4287 | |
4288 | ret = transport_stop_tasks_for_cmd(cmd); | |
4289 | ||
6708bb27 AG |
4290 | pr_debug("ConfigFS: cmd: %p t_tasks: %d stop tasks ret:" |
4291 | " %d\n", cmd, cmd->t_task_list_num, ret); | |
c66ac9db | 4292 | if (!ret) { |
6708bb27 | 4293 | pr_debug("ConfigFS: ITT[0x%08x] - stopping cmd....\n", |
e3d6f909 | 4294 | cmd->se_tfo->get_task_tag(cmd)); |
a1d8b49a | 4295 | wait_for_completion(&cmd->transport_lun_stop_comp); |
6708bb27 | 4296 | pr_debug("ConfigFS: ITT[0x%08x] - stopped cmd....\n", |
e3d6f909 | 4297 | cmd->se_tfo->get_task_tag(cmd)); |
c66ac9db | 4298 | } |
5951146d | 4299 | transport_remove_cmd_from_queue(cmd, &cmd->se_dev->dev_queue_obj); |
c66ac9db NB |
4300 | |
4301 | return 0; | |
4302 | } | |
4303 | ||
c66ac9db NB |
4304 | static void __transport_clear_lun_from_sessions(struct se_lun *lun) |
4305 | { | |
4306 | struct se_cmd *cmd = NULL; | |
4307 | unsigned long lun_flags, cmd_flags; | |
4308 | /* | |
4309 | * Do exception processing and return CHECK_CONDITION status to the | |
4310 | * Initiator Port. | |
4311 | */ | |
4312 | spin_lock_irqsave(&lun->lun_cmd_lock, lun_flags); | |
5951146d AG |
4313 | while (!list_empty(&lun->lun_cmd_list)) { |
4314 | cmd = list_first_entry(&lun->lun_cmd_list, | |
4315 | struct se_cmd, se_lun_node); | |
4316 | list_del(&cmd->se_lun_node); | |
4317 | ||
a1d8b49a | 4318 | atomic_set(&cmd->transport_lun_active, 0); |
c66ac9db NB |
4319 | /* |
4320 | * This will notify iscsi_target_transport.c: | |
4321 | * transport_cmd_check_stop() that a LUN shutdown is in | |
4322 | * progress for the iscsi_cmd_t. | |
4323 | */ | |
a1d8b49a | 4324 | spin_lock(&cmd->t_state_lock); |
6708bb27 | 4325 | pr_debug("SE_LUN[%d] - Setting cmd->transport" |
c66ac9db | 4326 | "_lun_stop for ITT: 0x%08x\n", |
e3d6f909 AG |
4327 | cmd->se_lun->unpacked_lun, |
4328 | cmd->se_tfo->get_task_tag(cmd)); | |
a1d8b49a AG |
4329 | atomic_set(&cmd->transport_lun_stop, 1); |
4330 | spin_unlock(&cmd->t_state_lock); | |
c66ac9db NB |
4331 | |
4332 | spin_unlock_irqrestore(&lun->lun_cmd_lock, lun_flags); | |
4333 | ||
6708bb27 AG |
4334 | if (!cmd->se_lun) { |
4335 | pr_err("ITT: 0x%08x, [i,t]_state: %u/%u\n", | |
e3d6f909 AG |
4336 | cmd->se_tfo->get_task_tag(cmd), |
4337 | cmd->se_tfo->get_cmd_state(cmd), cmd->t_state); | |
c66ac9db NB |
4338 | BUG(); |
4339 | } | |
4340 | /* | |
4341 | * If the Storage engine still owns the iscsi_cmd_t, determine | |
4342 | * and/or stop its context. | |
4343 | */ | |
6708bb27 | 4344 | pr_debug("SE_LUN[%d] - ITT: 0x%08x before transport" |
e3d6f909 AG |
4345 | "_lun_wait_for_tasks()\n", cmd->se_lun->unpacked_lun, |
4346 | cmd->se_tfo->get_task_tag(cmd)); | |
c66ac9db | 4347 | |
e3d6f909 | 4348 | if (transport_lun_wait_for_tasks(cmd, cmd->se_lun) < 0) { |
c66ac9db NB |
4349 | spin_lock_irqsave(&lun->lun_cmd_lock, lun_flags); |
4350 | continue; | |
4351 | } | |
4352 | ||
6708bb27 | 4353 | pr_debug("SE_LUN[%d] - ITT: 0x%08x after transport_lun" |
c66ac9db | 4354 | "_wait_for_tasks(): SUCCESS\n", |
e3d6f909 AG |
4355 | cmd->se_lun->unpacked_lun, |
4356 | cmd->se_tfo->get_task_tag(cmd)); | |
c66ac9db | 4357 | |
a1d8b49a | 4358 | spin_lock_irqsave(&cmd->t_state_lock, cmd_flags); |
6708bb27 | 4359 | if (!atomic_read(&cmd->transport_dev_active)) { |
a1d8b49a | 4360 | spin_unlock_irqrestore(&cmd->t_state_lock, cmd_flags); |
c66ac9db NB |
4361 | goto check_cond; |
4362 | } | |
a1d8b49a | 4363 | atomic_set(&cmd->transport_dev_active, 0); |
c66ac9db | 4364 | transport_all_task_dev_remove_state(cmd); |
a1d8b49a | 4365 | spin_unlock_irqrestore(&cmd->t_state_lock, cmd_flags); |
c66ac9db NB |
4366 | |
4367 | transport_free_dev_tasks(cmd); | |
4368 | /* | |
4369 | * The Storage engine stopped this struct se_cmd before it was | |
4370 | * send to the fabric frontend for delivery back to the | |
4371 | * Initiator Node. Return this SCSI CDB back with an | |
4372 | * CHECK_CONDITION status. | |
4373 | */ | |
4374 | check_cond: | |
4375 | transport_send_check_condition_and_sense(cmd, | |
4376 | TCM_NON_EXISTENT_LUN, 0); | |
4377 | /* | |
4378 | * If the fabric frontend is waiting for this iscsi_cmd_t to | |
4379 | * be released, notify the waiting thread now that LU has | |
4380 | * finished accessing it. | |
4381 | */ | |
a1d8b49a AG |
4382 | spin_lock_irqsave(&cmd->t_state_lock, cmd_flags); |
4383 | if (atomic_read(&cmd->transport_lun_fe_stop)) { | |
6708bb27 | 4384 | pr_debug("SE_LUN[%d] - Detected FE stop for" |
c66ac9db NB |
4385 | " struct se_cmd: %p ITT: 0x%08x\n", |
4386 | lun->unpacked_lun, | |
e3d6f909 | 4387 | cmd, cmd->se_tfo->get_task_tag(cmd)); |
c66ac9db | 4388 | |
a1d8b49a | 4389 | spin_unlock_irqrestore(&cmd->t_state_lock, |
c66ac9db NB |
4390 | cmd_flags); |
4391 | transport_cmd_check_stop(cmd, 1, 0); | |
a1d8b49a | 4392 | complete(&cmd->transport_lun_fe_stop_comp); |
c66ac9db NB |
4393 | spin_lock_irqsave(&lun->lun_cmd_lock, lun_flags); |
4394 | continue; | |
4395 | } | |
6708bb27 | 4396 | pr_debug("SE_LUN[%d] - ITT: 0x%08x finished processing\n", |
e3d6f909 | 4397 | lun->unpacked_lun, cmd->se_tfo->get_task_tag(cmd)); |
c66ac9db | 4398 | |
a1d8b49a | 4399 | spin_unlock_irqrestore(&cmd->t_state_lock, cmd_flags); |
c66ac9db NB |
4400 | spin_lock_irqsave(&lun->lun_cmd_lock, lun_flags); |
4401 | } | |
4402 | spin_unlock_irqrestore(&lun->lun_cmd_lock, lun_flags); | |
4403 | } | |
4404 | ||
4405 | static int transport_clear_lun_thread(void *p) | |
4406 | { | |
4407 | struct se_lun *lun = (struct se_lun *)p; | |
4408 | ||
4409 | __transport_clear_lun_from_sessions(lun); | |
4410 | complete(&lun->lun_shutdown_comp); | |
4411 | ||
4412 | return 0; | |
4413 | } | |
4414 | ||
4415 | int transport_clear_lun_from_sessions(struct se_lun *lun) | |
4416 | { | |
4417 | struct task_struct *kt; | |
4418 | ||
5951146d | 4419 | kt = kthread_run(transport_clear_lun_thread, lun, |
c66ac9db NB |
4420 | "tcm_cl_%u", lun->unpacked_lun); |
4421 | if (IS_ERR(kt)) { | |
6708bb27 | 4422 | pr_err("Unable to start clear_lun thread\n"); |
e3d6f909 | 4423 | return PTR_ERR(kt); |
c66ac9db NB |
4424 | } |
4425 | wait_for_completion(&lun->lun_shutdown_comp); | |
4426 | ||
4427 | return 0; | |
4428 | } | |
4429 | ||
d14921d6 NB |
4430 | /** |
4431 | * transport_wait_for_tasks - wait for completion to occur | |
4432 | * @cmd: command to wait | |
c66ac9db | 4433 | * |
d14921d6 NB |
4434 | * Called from frontend fabric context to wait for storage engine |
4435 | * to pause and/or release frontend generated struct se_cmd. | |
c66ac9db | 4436 | */ |
d14921d6 | 4437 | void transport_wait_for_tasks(struct se_cmd *cmd) |
c66ac9db NB |
4438 | { |
4439 | unsigned long flags; | |
4440 | ||
a1d8b49a | 4441 | spin_lock_irqsave(&cmd->t_state_lock, flags); |
d14921d6 NB |
4442 | if (!(cmd->se_cmd_flags & SCF_SE_LUN_CMD) && !(cmd->se_tmr_req)) { |
4443 | spin_unlock_irqrestore(&cmd->t_state_lock, flags); | |
4444 | return; | |
4445 | } | |
4446 | /* | |
4447 | * Only perform a possible wait_for_tasks if SCF_SUPPORTED_SAM_OPCODE | |
4448 | * has been set in transport_set_supported_SAM_opcode(). | |
4449 | */ | |
4450 | if (!(cmd->se_cmd_flags & SCF_SUPPORTED_SAM_OPCODE) && !cmd->se_tmr_req) { | |
4451 | spin_unlock_irqrestore(&cmd->t_state_lock, flags); | |
4452 | return; | |
4453 | } | |
c66ac9db NB |
4454 | /* |
4455 | * If we are already stopped due to an external event (ie: LUN shutdown) | |
4456 | * sleep until the connection can have the passed struct se_cmd back. | |
a1d8b49a | 4457 | * The cmd->transport_lun_stopped_sem will be upped by |
c66ac9db NB |
4458 | * transport_clear_lun_from_sessions() once the ConfigFS context caller |
4459 | * has completed its operation on the struct se_cmd. | |
4460 | */ | |
a1d8b49a | 4461 | if (atomic_read(&cmd->transport_lun_stop)) { |
c66ac9db | 4462 | |
6708bb27 | 4463 | pr_debug("wait_for_tasks: Stopping" |
e3d6f909 | 4464 | " wait_for_completion(&cmd->t_tasktransport_lun_fe" |
c66ac9db | 4465 | "_stop_comp); for ITT: 0x%08x\n", |
e3d6f909 | 4466 | cmd->se_tfo->get_task_tag(cmd)); |
c66ac9db NB |
4467 | /* |
4468 | * There is a special case for WRITES where a FE exception + | |
4469 | * LUN shutdown means ConfigFS context is still sleeping on | |
4470 | * transport_lun_stop_comp in transport_lun_wait_for_tasks(). | |
4471 | * We go ahead and up transport_lun_stop_comp just to be sure | |
4472 | * here. | |
4473 | */ | |
a1d8b49a AG |
4474 | spin_unlock_irqrestore(&cmd->t_state_lock, flags); |
4475 | complete(&cmd->transport_lun_stop_comp); | |
4476 | wait_for_completion(&cmd->transport_lun_fe_stop_comp); | |
4477 | spin_lock_irqsave(&cmd->t_state_lock, flags); | |
c66ac9db NB |
4478 | |
4479 | transport_all_task_dev_remove_state(cmd); | |
4480 | /* | |
4481 | * At this point, the frontend who was the originator of this | |
4482 | * struct se_cmd, now owns the structure and can be released through | |
4483 | * normal means below. | |
4484 | */ | |
6708bb27 | 4485 | pr_debug("wait_for_tasks: Stopped" |
e3d6f909 | 4486 | " wait_for_completion(&cmd->t_tasktransport_lun_fe_" |
c66ac9db | 4487 | "stop_comp); for ITT: 0x%08x\n", |
e3d6f909 | 4488 | cmd->se_tfo->get_task_tag(cmd)); |
c66ac9db | 4489 | |
a1d8b49a | 4490 | atomic_set(&cmd->transport_lun_stop, 0); |
c66ac9db | 4491 | } |
a1d8b49a | 4492 | if (!atomic_read(&cmd->t_transport_active) || |
d14921d6 NB |
4493 | atomic_read(&cmd->t_transport_aborted)) { |
4494 | spin_unlock_irqrestore(&cmd->t_state_lock, flags); | |
4495 | return; | |
4496 | } | |
c66ac9db | 4497 | |
a1d8b49a | 4498 | atomic_set(&cmd->t_transport_stop, 1); |
c66ac9db | 4499 | |
6708bb27 | 4500 | pr_debug("wait_for_tasks: Stopping %p ITT: 0x%08x" |
c66ac9db | 4501 | " i_state: %d, t_state/def_t_state: %d/%d, t_transport_stop" |
e3d6f909 AG |
4502 | " = TRUE\n", cmd, cmd->se_tfo->get_task_tag(cmd), |
4503 | cmd->se_tfo->get_cmd_state(cmd), cmd->t_state, | |
c66ac9db NB |
4504 | cmd->deferred_t_state); |
4505 | ||
a1d8b49a | 4506 | spin_unlock_irqrestore(&cmd->t_state_lock, flags); |
c66ac9db | 4507 | |
5951146d | 4508 | wake_up_interruptible(&cmd->se_dev->dev_queue_obj.thread_wq); |
c66ac9db | 4509 | |
a1d8b49a | 4510 | wait_for_completion(&cmd->t_transport_stop_comp); |
c66ac9db | 4511 | |
a1d8b49a AG |
4512 | spin_lock_irqsave(&cmd->t_state_lock, flags); |
4513 | atomic_set(&cmd->t_transport_active, 0); | |
4514 | atomic_set(&cmd->t_transport_stop, 0); | |
c66ac9db | 4515 | |
6708bb27 | 4516 | pr_debug("wait_for_tasks: Stopped wait_for_compltion(" |
a1d8b49a | 4517 | "&cmd->t_transport_stop_comp) for ITT: 0x%08x\n", |
e3d6f909 | 4518 | cmd->se_tfo->get_task_tag(cmd)); |
c66ac9db | 4519 | |
d14921d6 | 4520 | spin_unlock_irqrestore(&cmd->t_state_lock, flags); |
c66ac9db | 4521 | } |
d14921d6 | 4522 | EXPORT_SYMBOL(transport_wait_for_tasks); |
c66ac9db NB |
4523 | |
4524 | static int transport_get_sense_codes( | |
4525 | struct se_cmd *cmd, | |
4526 | u8 *asc, | |
4527 | u8 *ascq) | |
4528 | { | |
4529 | *asc = cmd->scsi_asc; | |
4530 | *ascq = cmd->scsi_ascq; | |
4531 | ||
4532 | return 0; | |
4533 | } | |
4534 | ||
4535 | static int transport_set_sense_codes( | |
4536 | struct se_cmd *cmd, | |
4537 | u8 asc, | |
4538 | u8 ascq) | |
4539 | { | |
4540 | cmd->scsi_asc = asc; | |
4541 | cmd->scsi_ascq = ascq; | |
4542 | ||
4543 | return 0; | |
4544 | } | |
4545 | ||
4546 | int transport_send_check_condition_and_sense( | |
4547 | struct se_cmd *cmd, | |
4548 | u8 reason, | |
4549 | int from_transport) | |
4550 | { | |
4551 | unsigned char *buffer = cmd->sense_buffer; | |
4552 | unsigned long flags; | |
4553 | int offset; | |
4554 | u8 asc = 0, ascq = 0; | |
4555 | ||
a1d8b49a | 4556 | spin_lock_irqsave(&cmd->t_state_lock, flags); |
c66ac9db | 4557 | if (cmd->se_cmd_flags & SCF_SENT_CHECK_CONDITION) { |
a1d8b49a | 4558 | spin_unlock_irqrestore(&cmd->t_state_lock, flags); |
c66ac9db NB |
4559 | return 0; |
4560 | } | |
4561 | cmd->se_cmd_flags |= SCF_SENT_CHECK_CONDITION; | |
a1d8b49a | 4562 | spin_unlock_irqrestore(&cmd->t_state_lock, flags); |
c66ac9db NB |
4563 | |
4564 | if (!reason && from_transport) | |
4565 | goto after_reason; | |
4566 | ||
4567 | if (!from_transport) | |
4568 | cmd->se_cmd_flags |= SCF_EMULATED_TASK_SENSE; | |
4569 | /* | |
4570 | * Data Segment and SenseLength of the fabric response PDU. | |
4571 | * | |
4572 | * TRANSPORT_SENSE_BUFFER is now set to SCSI_SENSE_BUFFERSIZE | |
4573 | * from include/scsi/scsi_cmnd.h | |
4574 | */ | |
e3d6f909 | 4575 | offset = cmd->se_tfo->set_fabric_sense_len(cmd, |
c66ac9db NB |
4576 | TRANSPORT_SENSE_BUFFER); |
4577 | /* | |
4578 | * Actual SENSE DATA, see SPC-3 7.23.2 SPC_SENSE_KEY_OFFSET uses | |
4579 | * SENSE KEY values from include/scsi/scsi.h | |
4580 | */ | |
4581 | switch (reason) { | |
4582 | case TCM_NON_EXISTENT_LUN: | |
eb39d340 NB |
4583 | /* CURRENT ERROR */ |
4584 | buffer[offset] = 0x70; | |
4585 | /* ILLEGAL REQUEST */ | |
4586 | buffer[offset+SPC_SENSE_KEY_OFFSET] = ILLEGAL_REQUEST; | |
4587 | /* LOGICAL UNIT NOT SUPPORTED */ | |
4588 | buffer[offset+SPC_ASC_KEY_OFFSET] = 0x25; | |
4589 | break; | |
c66ac9db NB |
4590 | case TCM_UNSUPPORTED_SCSI_OPCODE: |
4591 | case TCM_SECTOR_COUNT_TOO_MANY: | |
4592 | /* CURRENT ERROR */ | |
4593 | buffer[offset] = 0x70; | |
4594 | /* ILLEGAL REQUEST */ | |
4595 | buffer[offset+SPC_SENSE_KEY_OFFSET] = ILLEGAL_REQUEST; | |
4596 | /* INVALID COMMAND OPERATION CODE */ | |
4597 | buffer[offset+SPC_ASC_KEY_OFFSET] = 0x20; | |
4598 | break; | |
4599 | case TCM_UNKNOWN_MODE_PAGE: | |
4600 | /* CURRENT ERROR */ | |
4601 | buffer[offset] = 0x70; | |
4602 | /* ILLEGAL REQUEST */ | |
4603 | buffer[offset+SPC_SENSE_KEY_OFFSET] = ILLEGAL_REQUEST; | |
4604 | /* INVALID FIELD IN CDB */ | |
4605 | buffer[offset+SPC_ASC_KEY_OFFSET] = 0x24; | |
4606 | break; | |
4607 | case TCM_CHECK_CONDITION_ABORT_CMD: | |
4608 | /* CURRENT ERROR */ | |
4609 | buffer[offset] = 0x70; | |
4610 | /* ABORTED COMMAND */ | |
4611 | buffer[offset+SPC_SENSE_KEY_OFFSET] = ABORTED_COMMAND; | |
4612 | /* BUS DEVICE RESET FUNCTION OCCURRED */ | |
4613 | buffer[offset+SPC_ASC_KEY_OFFSET] = 0x29; | |
4614 | buffer[offset+SPC_ASCQ_KEY_OFFSET] = 0x03; | |
4615 | break; | |
4616 | case TCM_INCORRECT_AMOUNT_OF_DATA: | |
4617 | /* CURRENT ERROR */ | |
4618 | buffer[offset] = 0x70; | |
4619 | /* ABORTED COMMAND */ | |
4620 | buffer[offset+SPC_SENSE_KEY_OFFSET] = ABORTED_COMMAND; | |
4621 | /* WRITE ERROR */ | |
4622 | buffer[offset+SPC_ASC_KEY_OFFSET] = 0x0c; | |
4623 | /* NOT ENOUGH UNSOLICITED DATA */ | |
4624 | buffer[offset+SPC_ASCQ_KEY_OFFSET] = 0x0d; | |
4625 | break; | |
4626 | case TCM_INVALID_CDB_FIELD: | |
4627 | /* CURRENT ERROR */ | |
4628 | buffer[offset] = 0x70; | |
4629 | /* ABORTED COMMAND */ | |
4630 | buffer[offset+SPC_SENSE_KEY_OFFSET] = ABORTED_COMMAND; | |
4631 | /* INVALID FIELD IN CDB */ | |
4632 | buffer[offset+SPC_ASC_KEY_OFFSET] = 0x24; | |
4633 | break; | |
4634 | case TCM_INVALID_PARAMETER_LIST: | |
4635 | /* CURRENT ERROR */ | |
4636 | buffer[offset] = 0x70; | |
4637 | /* ABORTED COMMAND */ | |
4638 | buffer[offset+SPC_SENSE_KEY_OFFSET] = ABORTED_COMMAND; | |
4639 | /* INVALID FIELD IN PARAMETER LIST */ | |
4640 | buffer[offset+SPC_ASC_KEY_OFFSET] = 0x26; | |
4641 | break; | |
4642 | case TCM_UNEXPECTED_UNSOLICITED_DATA: | |
4643 | /* CURRENT ERROR */ | |
4644 | buffer[offset] = 0x70; | |
4645 | /* ABORTED COMMAND */ | |
4646 | buffer[offset+SPC_SENSE_KEY_OFFSET] = ABORTED_COMMAND; | |
4647 | /* WRITE ERROR */ | |
4648 | buffer[offset+SPC_ASC_KEY_OFFSET] = 0x0c; | |
4649 | /* UNEXPECTED_UNSOLICITED_DATA */ | |
4650 | buffer[offset+SPC_ASCQ_KEY_OFFSET] = 0x0c; | |
4651 | break; | |
4652 | case TCM_SERVICE_CRC_ERROR: | |
4653 | /* CURRENT ERROR */ | |
4654 | buffer[offset] = 0x70; | |
4655 | /* ABORTED COMMAND */ | |
4656 | buffer[offset+SPC_SENSE_KEY_OFFSET] = ABORTED_COMMAND; | |
4657 | /* PROTOCOL SERVICE CRC ERROR */ | |
4658 | buffer[offset+SPC_ASC_KEY_OFFSET] = 0x47; | |
4659 | /* N/A */ | |
4660 | buffer[offset+SPC_ASCQ_KEY_OFFSET] = 0x05; | |
4661 | break; | |
4662 | case TCM_SNACK_REJECTED: | |
4663 | /* CURRENT ERROR */ | |
4664 | buffer[offset] = 0x70; | |
4665 | /* ABORTED COMMAND */ | |
4666 | buffer[offset+SPC_SENSE_KEY_OFFSET] = ABORTED_COMMAND; | |
4667 | /* READ ERROR */ | |
4668 | buffer[offset+SPC_ASC_KEY_OFFSET] = 0x11; | |
4669 | /* FAILED RETRANSMISSION REQUEST */ | |
4670 | buffer[offset+SPC_ASCQ_KEY_OFFSET] = 0x13; | |
4671 | break; | |
4672 | case TCM_WRITE_PROTECTED: | |
4673 | /* CURRENT ERROR */ | |
4674 | buffer[offset] = 0x70; | |
4675 | /* DATA PROTECT */ | |
4676 | buffer[offset+SPC_SENSE_KEY_OFFSET] = DATA_PROTECT; | |
4677 | /* WRITE PROTECTED */ | |
4678 | buffer[offset+SPC_ASC_KEY_OFFSET] = 0x27; | |
4679 | break; | |
4680 | case TCM_CHECK_CONDITION_UNIT_ATTENTION: | |
4681 | /* CURRENT ERROR */ | |
4682 | buffer[offset] = 0x70; | |
4683 | /* UNIT ATTENTION */ | |
4684 | buffer[offset+SPC_SENSE_KEY_OFFSET] = UNIT_ATTENTION; | |
4685 | core_scsi3_ua_for_check_condition(cmd, &asc, &ascq); | |
4686 | buffer[offset+SPC_ASC_KEY_OFFSET] = asc; | |
4687 | buffer[offset+SPC_ASCQ_KEY_OFFSET] = ascq; | |
4688 | break; | |
4689 | case TCM_CHECK_CONDITION_NOT_READY: | |
4690 | /* CURRENT ERROR */ | |
4691 | buffer[offset] = 0x70; | |
4692 | /* Not Ready */ | |
4693 | buffer[offset+SPC_SENSE_KEY_OFFSET] = NOT_READY; | |
4694 | transport_get_sense_codes(cmd, &asc, &ascq); | |
4695 | buffer[offset+SPC_ASC_KEY_OFFSET] = asc; | |
4696 | buffer[offset+SPC_ASCQ_KEY_OFFSET] = ascq; | |
4697 | break; | |
4698 | case TCM_LOGICAL_UNIT_COMMUNICATION_FAILURE: | |
4699 | default: | |
4700 | /* CURRENT ERROR */ | |
4701 | buffer[offset] = 0x70; | |
4702 | /* ILLEGAL REQUEST */ | |
4703 | buffer[offset+SPC_SENSE_KEY_OFFSET] = ILLEGAL_REQUEST; | |
4704 | /* LOGICAL UNIT COMMUNICATION FAILURE */ | |
4705 | buffer[offset+SPC_ASC_KEY_OFFSET] = 0x80; | |
4706 | break; | |
4707 | } | |
4708 | /* | |
4709 | * This code uses linux/include/scsi/scsi.h SAM status codes! | |
4710 | */ | |
4711 | cmd->scsi_status = SAM_STAT_CHECK_CONDITION; | |
4712 | /* | |
4713 | * Automatically padded, this value is encoded in the fabric's | |
4714 | * data_length response PDU containing the SCSI defined sense data. | |
4715 | */ | |
4716 | cmd->scsi_sense_length = TRANSPORT_SENSE_BUFFER + offset; | |
4717 | ||
4718 | after_reason: | |
07bde79a | 4719 | return cmd->se_tfo->queue_status(cmd); |
c66ac9db NB |
4720 | } |
4721 | EXPORT_SYMBOL(transport_send_check_condition_and_sense); | |
4722 | ||
4723 | int transport_check_aborted_status(struct se_cmd *cmd, int send_status) | |
4724 | { | |
4725 | int ret = 0; | |
4726 | ||
a1d8b49a | 4727 | if (atomic_read(&cmd->t_transport_aborted) != 0) { |
6708bb27 | 4728 | if (!send_status || |
c66ac9db NB |
4729 | (cmd->se_cmd_flags & SCF_SENT_DELAYED_TAS)) |
4730 | return 1; | |
4731 | #if 0 | |
6708bb27 | 4732 | pr_debug("Sending delayed SAM_STAT_TASK_ABORTED" |
c66ac9db | 4733 | " status for CDB: 0x%02x ITT: 0x%08x\n", |
a1d8b49a | 4734 | cmd->t_task_cdb[0], |
e3d6f909 | 4735 | cmd->se_tfo->get_task_tag(cmd)); |
c66ac9db NB |
4736 | #endif |
4737 | cmd->se_cmd_flags |= SCF_SENT_DELAYED_TAS; | |
e3d6f909 | 4738 | cmd->se_tfo->queue_status(cmd); |
c66ac9db NB |
4739 | ret = 1; |
4740 | } | |
4741 | return ret; | |
4742 | } | |
4743 | EXPORT_SYMBOL(transport_check_aborted_status); | |
4744 | ||
4745 | void transport_send_task_abort(struct se_cmd *cmd) | |
4746 | { | |
c252f003 NB |
4747 | unsigned long flags; |
4748 | ||
4749 | spin_lock_irqsave(&cmd->t_state_lock, flags); | |
4750 | if (cmd->se_cmd_flags & SCF_SENT_CHECK_CONDITION) { | |
4751 | spin_unlock_irqrestore(&cmd->t_state_lock, flags); | |
4752 | return; | |
4753 | } | |
4754 | spin_unlock_irqrestore(&cmd->t_state_lock, flags); | |
4755 | ||
c66ac9db NB |
4756 | /* |
4757 | * If there are still expected incoming fabric WRITEs, we wait | |
4758 | * until until they have completed before sending a TASK_ABORTED | |
4759 | * response. This response with TASK_ABORTED status will be | |
4760 | * queued back to fabric module by transport_check_aborted_status(). | |
4761 | */ | |
4762 | if (cmd->data_direction == DMA_TO_DEVICE) { | |
e3d6f909 | 4763 | if (cmd->se_tfo->write_pending_status(cmd) != 0) { |
a1d8b49a | 4764 | atomic_inc(&cmd->t_transport_aborted); |
c66ac9db NB |
4765 | smp_mb__after_atomic_inc(); |
4766 | cmd->scsi_status = SAM_STAT_TASK_ABORTED; | |
4767 | transport_new_cmd_failure(cmd); | |
4768 | return; | |
4769 | } | |
4770 | } | |
4771 | cmd->scsi_status = SAM_STAT_TASK_ABORTED; | |
4772 | #if 0 | |
6708bb27 | 4773 | pr_debug("Setting SAM_STAT_TASK_ABORTED status for CDB: 0x%02x," |
a1d8b49a | 4774 | " ITT: 0x%08x\n", cmd->t_task_cdb[0], |
e3d6f909 | 4775 | cmd->se_tfo->get_task_tag(cmd)); |
c66ac9db | 4776 | #endif |
e3d6f909 | 4777 | cmd->se_tfo->queue_status(cmd); |
c66ac9db NB |
4778 | } |
4779 | ||
4780 | /* transport_generic_do_tmr(): | |
4781 | * | |
4782 | * | |
4783 | */ | |
4784 | int transport_generic_do_tmr(struct se_cmd *cmd) | |
4785 | { | |
5951146d | 4786 | struct se_device *dev = cmd->se_dev; |
c66ac9db NB |
4787 | struct se_tmr_req *tmr = cmd->se_tmr_req; |
4788 | int ret; | |
4789 | ||
4790 | switch (tmr->function) { | |
5c6cd613 | 4791 | case TMR_ABORT_TASK: |
c66ac9db NB |
4792 | tmr->response = TMR_FUNCTION_REJECTED; |
4793 | break; | |
5c6cd613 NB |
4794 | case TMR_ABORT_TASK_SET: |
4795 | case TMR_CLEAR_ACA: | |
4796 | case TMR_CLEAR_TASK_SET: | |
c66ac9db NB |
4797 | tmr->response = TMR_TASK_MGMT_FUNCTION_NOT_SUPPORTED; |
4798 | break; | |
5c6cd613 | 4799 | case TMR_LUN_RESET: |
c66ac9db NB |
4800 | ret = core_tmr_lun_reset(dev, tmr, NULL, NULL); |
4801 | tmr->response = (!ret) ? TMR_FUNCTION_COMPLETE : | |
4802 | TMR_FUNCTION_REJECTED; | |
4803 | break; | |
5c6cd613 | 4804 | case TMR_TARGET_WARM_RESET: |
c66ac9db NB |
4805 | tmr->response = TMR_FUNCTION_REJECTED; |
4806 | break; | |
5c6cd613 | 4807 | case TMR_TARGET_COLD_RESET: |
c66ac9db NB |
4808 | tmr->response = TMR_FUNCTION_REJECTED; |
4809 | break; | |
c66ac9db | 4810 | default: |
6708bb27 | 4811 | pr_err("Uknown TMR function: 0x%02x.\n", |
c66ac9db NB |
4812 | tmr->function); |
4813 | tmr->response = TMR_FUNCTION_REJECTED; | |
4814 | break; | |
4815 | } | |
4816 | ||
4817 | cmd->t_state = TRANSPORT_ISTATE_PROCESSING; | |
e3d6f909 | 4818 | cmd->se_tfo->queue_tm_rsp(cmd); |
c66ac9db NB |
4819 | |
4820 | transport_cmd_check_stop(cmd, 2, 0); | |
4821 | return 0; | |
4822 | } | |
4823 | ||
c66ac9db NB |
4824 | /* transport_processing_thread(): |
4825 | * | |
4826 | * | |
4827 | */ | |
4828 | static int transport_processing_thread(void *param) | |
4829 | { | |
5951146d | 4830 | int ret; |
c66ac9db NB |
4831 | struct se_cmd *cmd; |
4832 | struct se_device *dev = (struct se_device *) param; | |
c66ac9db NB |
4833 | |
4834 | set_user_nice(current, -20); | |
4835 | ||
4836 | while (!kthread_should_stop()) { | |
e3d6f909 AG |
4837 | ret = wait_event_interruptible(dev->dev_queue_obj.thread_wq, |
4838 | atomic_read(&dev->dev_queue_obj.queue_cnt) || | |
c66ac9db NB |
4839 | kthread_should_stop()); |
4840 | if (ret < 0) | |
4841 | goto out; | |
4842 | ||
c66ac9db NB |
4843 | get_cmd: |
4844 | __transport_execute_tasks(dev); | |
4845 | ||
5951146d AG |
4846 | cmd = transport_get_cmd_from_queue(&dev->dev_queue_obj); |
4847 | if (!cmd) | |
c66ac9db NB |
4848 | continue; |
4849 | ||
5951146d | 4850 | switch (cmd->t_state) { |
680b73c5 CH |
4851 | case TRANSPORT_NEW_CMD: |
4852 | BUG(); | |
4853 | break; | |
c66ac9db | 4854 | case TRANSPORT_NEW_CMD_MAP: |
6708bb27 AG |
4855 | if (!cmd->se_tfo->new_cmd_map) { |
4856 | pr_err("cmd->se_tfo->new_cmd_map is" | |
c66ac9db NB |
4857 | " NULL for TRANSPORT_NEW_CMD_MAP\n"); |
4858 | BUG(); | |
4859 | } | |
e3d6f909 | 4860 | ret = cmd->se_tfo->new_cmd_map(cmd); |
c66ac9db NB |
4861 | if (ret < 0) { |
4862 | cmd->transport_error_status = ret; | |
4863 | transport_generic_request_failure(cmd, NULL, | |
4864 | 0, (cmd->data_direction != | |
4865 | DMA_TO_DEVICE)); | |
4866 | break; | |
4867 | } | |
c66ac9db | 4868 | ret = transport_generic_new_cmd(cmd); |
07bde79a NB |
4869 | if (ret == -EAGAIN) |
4870 | break; | |
4871 | else if (ret < 0) { | |
c66ac9db NB |
4872 | cmd->transport_error_status = ret; |
4873 | transport_generic_request_failure(cmd, NULL, | |
4874 | 0, (cmd->data_direction != | |
4875 | DMA_TO_DEVICE)); | |
4876 | } | |
4877 | break; | |
4878 | case TRANSPORT_PROCESS_WRITE: | |
4879 | transport_generic_process_write(cmd); | |
4880 | break; | |
4881 | case TRANSPORT_COMPLETE_OK: | |
4882 | transport_stop_all_task_timers(cmd); | |
4883 | transport_generic_complete_ok(cmd); | |
4884 | break; | |
4885 | case TRANSPORT_REMOVE: | |
e6a2573f | 4886 | transport_put_cmd(cmd); |
c66ac9db | 4887 | break; |
f4366772 | 4888 | case TRANSPORT_FREE_CMD_INTR: |
82f1c8a4 | 4889 | transport_generic_free_cmd(cmd, 0); |
f4366772 | 4890 | break; |
c66ac9db NB |
4891 | case TRANSPORT_PROCESS_TMR: |
4892 | transport_generic_do_tmr(cmd); | |
4893 | break; | |
4894 | case TRANSPORT_COMPLETE_FAILURE: | |
4895 | transport_generic_request_failure(cmd, NULL, 1, 1); | |
4896 | break; | |
4897 | case TRANSPORT_COMPLETE_TIMEOUT: | |
4898 | transport_stop_all_task_timers(cmd); | |
4899 | transport_generic_request_timeout(cmd); | |
4900 | break; | |
07bde79a NB |
4901 | case TRANSPORT_COMPLETE_QF_WP: |
4902 | transport_generic_write_pending(cmd); | |
4903 | break; | |
c66ac9db | 4904 | default: |
6708bb27 | 4905 | pr_err("Unknown t_state: %d deferred_t_state:" |
c66ac9db | 4906 | " %d for ITT: 0x%08x i_state: %d on SE LUN:" |
5951146d | 4907 | " %u\n", cmd->t_state, cmd->deferred_t_state, |
e3d6f909 AG |
4908 | cmd->se_tfo->get_task_tag(cmd), |
4909 | cmd->se_tfo->get_cmd_state(cmd), | |
4910 | cmd->se_lun->unpacked_lun); | |
c66ac9db NB |
4911 | BUG(); |
4912 | } | |
4913 | ||
4914 | goto get_cmd; | |
4915 | } | |
4916 | ||
4917 | out: | |
ce8762f6 NB |
4918 | WARN_ON(!list_empty(&dev->state_task_list)); |
4919 | WARN_ON(!list_empty(&dev->dev_queue_obj.qobj_list)); | |
c66ac9db NB |
4920 | dev->process_thread = NULL; |
4921 | return 0; | |
4922 | } |