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c66ac9db NB |
1 | /******************************************************************************* |
2 | * Filename: target_core_transport.c | |
3 | * | |
4 | * This file contains the Generic Target Engine Core. | |
5 | * | |
6 | * Copyright (c) 2002, 2003, 2004, 2005 PyX Technologies, Inc. | |
7 | * Copyright (c) 2005, 2006, 2007 SBE, Inc. | |
8 | * Copyright (c) 2007-2010 Rising Tide Systems | |
9 | * Copyright (c) 2008-2010 Linux-iSCSI.org | |
10 | * | |
11 | * Nicholas A. Bellinger <nab@kernel.org> | |
12 | * | |
13 | * This program is free software; you can redistribute it and/or modify | |
14 | * it under the terms of the GNU General Public License as published by | |
15 | * the Free Software Foundation; either version 2 of the License, or | |
16 | * (at your option) any later version. | |
17 | * | |
18 | * This program is distributed in the hope that it will be useful, | |
19 | * but WITHOUT ANY WARRANTY; without even the implied warranty of | |
20 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
21 | * GNU General Public License for more details. | |
22 | * | |
23 | * You should have received a copy of the GNU General Public License | |
24 | * along with this program; if not, write to the Free Software | |
25 | * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. | |
26 | * | |
27 | ******************************************************************************/ | |
28 | ||
c66ac9db NB |
29 | #include <linux/net.h> |
30 | #include <linux/delay.h> | |
31 | #include <linux/string.h> | |
32 | #include <linux/timer.h> | |
33 | #include <linux/slab.h> | |
34 | #include <linux/blkdev.h> | |
35 | #include <linux/spinlock.h> | |
c66ac9db NB |
36 | #include <linux/kthread.h> |
37 | #include <linux/in.h> | |
38 | #include <linux/cdrom.h> | |
39 | #include <asm/unaligned.h> | |
40 | #include <net/sock.h> | |
41 | #include <net/tcp.h> | |
42 | #include <scsi/scsi.h> | |
43 | #include <scsi/scsi_cmnd.h> | |
e66ecd50 | 44 | #include <scsi/scsi_tcq.h> |
c66ac9db NB |
45 | |
46 | #include <target/target_core_base.h> | |
47 | #include <target/target_core_device.h> | |
48 | #include <target/target_core_tmr.h> | |
49 | #include <target/target_core_tpg.h> | |
50 | #include <target/target_core_transport.h> | |
51 | #include <target/target_core_fabric_ops.h> | |
52 | #include <target/target_core_configfs.h> | |
53 | ||
54 | #include "target_core_alua.h" | |
55 | #include "target_core_hba.h" | |
56 | #include "target_core_pr.h" | |
c66ac9db NB |
57 | #include "target_core_ua.h" |
58 | ||
e3d6f909 | 59 | static int sub_api_initialized; |
c66ac9db | 60 | |
35e0e757 | 61 | static struct workqueue_struct *target_completion_wq; |
c66ac9db NB |
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 | 76 | static void transport_handle_queue_full(struct se_cmd *cmd, |
e057f533 | 77 | struct se_device *dev); |
c66ac9db NB |
78 | static void transport_direct_request_timeout(struct se_cmd *cmd); |
79 | static void transport_free_dev_tasks(struct se_cmd *cmd); | |
a1d8b49a | 80 | static u32 transport_allocate_tasks(struct se_cmd *cmd, |
ec98f782 | 81 | unsigned long long starting_lba, |
c66ac9db | 82 | enum dma_data_direction data_direction, |
ec98f782 | 83 | struct scatterlist *sgl, unsigned int nents); |
05d1c7c0 | 84 | static int transport_generic_get_mem(struct se_cmd *cmd); |
39c05f32 | 85 | static void transport_put_cmd(struct se_cmd *cmd); |
3df8d40b | 86 | static void transport_remove_cmd_from_queue(struct se_cmd *cmd); |
c66ac9db | 87 | static int transport_set_sense_codes(struct se_cmd *cmd, u8 asc, u8 ascq); |
35e0e757 CH |
88 | static void transport_generic_request_failure(struct se_cmd *, int, int); |
89 | static void target_complete_ok_work(struct work_struct *work); | |
c66ac9db | 90 | |
e3d6f909 | 91 | int init_se_kmem_caches(void) |
c66ac9db | 92 | { |
c66ac9db NB |
93 | se_cmd_cache = kmem_cache_create("se_cmd_cache", |
94 | sizeof(struct se_cmd), __alignof__(struct se_cmd), 0, NULL); | |
6708bb27 AG |
95 | if (!se_cmd_cache) { |
96 | pr_err("kmem_cache_create for struct se_cmd failed\n"); | |
c66ac9db NB |
97 | goto out; |
98 | } | |
99 | se_tmr_req_cache = kmem_cache_create("se_tmr_cache", | |
100 | sizeof(struct se_tmr_req), __alignof__(struct se_tmr_req), | |
101 | 0, NULL); | |
6708bb27 AG |
102 | if (!se_tmr_req_cache) { |
103 | pr_err("kmem_cache_create() for struct se_tmr_req" | |
c66ac9db | 104 | " failed\n"); |
35e0e757 | 105 | goto out_free_cmd_cache; |
c66ac9db NB |
106 | } |
107 | se_sess_cache = kmem_cache_create("se_sess_cache", | |
108 | sizeof(struct se_session), __alignof__(struct se_session), | |
109 | 0, NULL); | |
6708bb27 AG |
110 | if (!se_sess_cache) { |
111 | pr_err("kmem_cache_create() for struct se_session" | |
c66ac9db | 112 | " failed\n"); |
35e0e757 | 113 | goto out_free_tmr_req_cache; |
c66ac9db NB |
114 | } |
115 | se_ua_cache = kmem_cache_create("se_ua_cache", | |
116 | sizeof(struct se_ua), __alignof__(struct se_ua), | |
117 | 0, NULL); | |
6708bb27 AG |
118 | if (!se_ua_cache) { |
119 | pr_err("kmem_cache_create() for struct se_ua failed\n"); | |
35e0e757 | 120 | goto out_free_sess_cache; |
c66ac9db | 121 | } |
c66ac9db NB |
122 | t10_pr_reg_cache = kmem_cache_create("t10_pr_reg_cache", |
123 | sizeof(struct t10_pr_registration), | |
124 | __alignof__(struct t10_pr_registration), 0, NULL); | |
6708bb27 AG |
125 | if (!t10_pr_reg_cache) { |
126 | pr_err("kmem_cache_create() for struct t10_pr_registration" | |
c66ac9db | 127 | " failed\n"); |
35e0e757 | 128 | goto out_free_ua_cache; |
c66ac9db NB |
129 | } |
130 | t10_alua_lu_gp_cache = kmem_cache_create("t10_alua_lu_gp_cache", | |
131 | sizeof(struct t10_alua_lu_gp), __alignof__(struct t10_alua_lu_gp), | |
132 | 0, NULL); | |
6708bb27 AG |
133 | if (!t10_alua_lu_gp_cache) { |
134 | pr_err("kmem_cache_create() for t10_alua_lu_gp_cache" | |
c66ac9db | 135 | " failed\n"); |
35e0e757 | 136 | goto out_free_pr_reg_cache; |
c66ac9db NB |
137 | } |
138 | t10_alua_lu_gp_mem_cache = kmem_cache_create("t10_alua_lu_gp_mem_cache", | |
139 | sizeof(struct t10_alua_lu_gp_member), | |
140 | __alignof__(struct t10_alua_lu_gp_member), 0, NULL); | |
6708bb27 AG |
141 | if (!t10_alua_lu_gp_mem_cache) { |
142 | pr_err("kmem_cache_create() for t10_alua_lu_gp_mem_" | |
c66ac9db | 143 | "cache failed\n"); |
35e0e757 | 144 | goto out_free_lu_gp_cache; |
c66ac9db NB |
145 | } |
146 | t10_alua_tg_pt_gp_cache = kmem_cache_create("t10_alua_tg_pt_gp_cache", | |
147 | sizeof(struct t10_alua_tg_pt_gp), | |
148 | __alignof__(struct t10_alua_tg_pt_gp), 0, NULL); | |
6708bb27 AG |
149 | if (!t10_alua_tg_pt_gp_cache) { |
150 | pr_err("kmem_cache_create() for t10_alua_tg_pt_gp_" | |
c66ac9db | 151 | "cache failed\n"); |
35e0e757 | 152 | goto out_free_lu_gp_mem_cache; |
c66ac9db NB |
153 | } |
154 | t10_alua_tg_pt_gp_mem_cache = kmem_cache_create( | |
155 | "t10_alua_tg_pt_gp_mem_cache", | |
156 | sizeof(struct t10_alua_tg_pt_gp_member), | |
157 | __alignof__(struct t10_alua_tg_pt_gp_member), | |
158 | 0, NULL); | |
6708bb27 AG |
159 | if (!t10_alua_tg_pt_gp_mem_cache) { |
160 | pr_err("kmem_cache_create() for t10_alua_tg_pt_gp_" | |
c66ac9db | 161 | "mem_t failed\n"); |
35e0e757 | 162 | goto out_free_tg_pt_gp_cache; |
c66ac9db NB |
163 | } |
164 | ||
35e0e757 CH |
165 | target_completion_wq = alloc_workqueue("target_completion", |
166 | WQ_MEM_RECLAIM, 0); | |
167 | if (!target_completion_wq) | |
168 | goto out_free_tg_pt_gp_mem_cache; | |
169 | ||
c66ac9db | 170 | return 0; |
35e0e757 CH |
171 | |
172 | out_free_tg_pt_gp_mem_cache: | |
173 | kmem_cache_destroy(t10_alua_tg_pt_gp_mem_cache); | |
174 | out_free_tg_pt_gp_cache: | |
175 | kmem_cache_destroy(t10_alua_tg_pt_gp_cache); | |
176 | out_free_lu_gp_mem_cache: | |
177 | kmem_cache_destroy(t10_alua_lu_gp_mem_cache); | |
178 | out_free_lu_gp_cache: | |
179 | kmem_cache_destroy(t10_alua_lu_gp_cache); | |
180 | out_free_pr_reg_cache: | |
181 | kmem_cache_destroy(t10_pr_reg_cache); | |
182 | out_free_ua_cache: | |
183 | kmem_cache_destroy(se_ua_cache); | |
184 | out_free_sess_cache: | |
185 | kmem_cache_destroy(se_sess_cache); | |
186 | out_free_tmr_req_cache: | |
187 | kmem_cache_destroy(se_tmr_req_cache); | |
188 | out_free_cmd_cache: | |
189 | kmem_cache_destroy(se_cmd_cache); | |
c66ac9db | 190 | out: |
e3d6f909 | 191 | return -ENOMEM; |
c66ac9db NB |
192 | } |
193 | ||
e3d6f909 | 194 | void release_se_kmem_caches(void) |
c66ac9db | 195 | { |
35e0e757 | 196 | destroy_workqueue(target_completion_wq); |
c66ac9db NB |
197 | kmem_cache_destroy(se_cmd_cache); |
198 | kmem_cache_destroy(se_tmr_req_cache); | |
199 | kmem_cache_destroy(se_sess_cache); | |
200 | kmem_cache_destroy(se_ua_cache); | |
c66ac9db NB |
201 | kmem_cache_destroy(t10_pr_reg_cache); |
202 | kmem_cache_destroy(t10_alua_lu_gp_cache); | |
203 | kmem_cache_destroy(t10_alua_lu_gp_mem_cache); | |
204 | kmem_cache_destroy(t10_alua_tg_pt_gp_cache); | |
205 | kmem_cache_destroy(t10_alua_tg_pt_gp_mem_cache); | |
c66ac9db NB |
206 | } |
207 | ||
e3d6f909 AG |
208 | /* This code ensures unique mib indexes are handed out. */ |
209 | static DEFINE_SPINLOCK(scsi_mib_index_lock); | |
210 | static u32 scsi_mib_index[SCSI_INDEX_TYPE_MAX]; | |
e89d15ee NB |
211 | |
212 | /* | |
213 | * Allocate a new row index for the entry type specified | |
214 | */ | |
215 | u32 scsi_get_new_index(scsi_index_t type) | |
216 | { | |
217 | u32 new_index; | |
218 | ||
e3d6f909 | 219 | BUG_ON((type < 0) || (type >= SCSI_INDEX_TYPE_MAX)); |
e89d15ee | 220 | |
e3d6f909 AG |
221 | spin_lock(&scsi_mib_index_lock); |
222 | new_index = ++scsi_mib_index[type]; | |
223 | spin_unlock(&scsi_mib_index_lock); | |
e89d15ee NB |
224 | |
225 | return new_index; | |
226 | } | |
227 | ||
c66ac9db NB |
228 | void transport_init_queue_obj(struct se_queue_obj *qobj) |
229 | { | |
230 | atomic_set(&qobj->queue_cnt, 0); | |
231 | INIT_LIST_HEAD(&qobj->qobj_list); | |
232 | init_waitqueue_head(&qobj->thread_wq); | |
233 | spin_lock_init(&qobj->cmd_queue_lock); | |
234 | } | |
235 | EXPORT_SYMBOL(transport_init_queue_obj); | |
236 | ||
dbc5623e | 237 | void transport_subsystem_check_init(void) |
c66ac9db NB |
238 | { |
239 | int ret; | |
240 | ||
dbc5623e NB |
241 | if (sub_api_initialized) |
242 | return; | |
243 | ||
c66ac9db NB |
244 | ret = request_module("target_core_iblock"); |
245 | if (ret != 0) | |
6708bb27 | 246 | pr_err("Unable to load target_core_iblock\n"); |
c66ac9db NB |
247 | |
248 | ret = request_module("target_core_file"); | |
249 | if (ret != 0) | |
6708bb27 | 250 | pr_err("Unable to load target_core_file\n"); |
c66ac9db NB |
251 | |
252 | ret = request_module("target_core_pscsi"); | |
253 | if (ret != 0) | |
6708bb27 | 254 | pr_err("Unable to load target_core_pscsi\n"); |
c66ac9db NB |
255 | |
256 | ret = request_module("target_core_stgt"); | |
257 | if (ret != 0) | |
6708bb27 | 258 | pr_err("Unable to load target_core_stgt\n"); |
c66ac9db | 259 | |
e3d6f909 | 260 | sub_api_initialized = 1; |
dbc5623e | 261 | return; |
c66ac9db NB |
262 | } |
263 | ||
264 | struct se_session *transport_init_session(void) | |
265 | { | |
266 | struct se_session *se_sess; | |
267 | ||
268 | se_sess = kmem_cache_zalloc(se_sess_cache, GFP_KERNEL); | |
6708bb27 AG |
269 | if (!se_sess) { |
270 | pr_err("Unable to allocate struct se_session from" | |
c66ac9db NB |
271 | " se_sess_cache\n"); |
272 | return ERR_PTR(-ENOMEM); | |
273 | } | |
274 | INIT_LIST_HEAD(&se_sess->sess_list); | |
275 | INIT_LIST_HEAD(&se_sess->sess_acl_list); | |
c66ac9db NB |
276 | |
277 | return se_sess; | |
278 | } | |
279 | EXPORT_SYMBOL(transport_init_session); | |
280 | ||
281 | /* | |
282 | * Called with spin_lock_bh(&struct se_portal_group->session_lock called. | |
283 | */ | |
284 | void __transport_register_session( | |
285 | struct se_portal_group *se_tpg, | |
286 | struct se_node_acl *se_nacl, | |
287 | struct se_session *se_sess, | |
288 | void *fabric_sess_ptr) | |
289 | { | |
290 | unsigned char buf[PR_REG_ISID_LEN]; | |
291 | ||
292 | se_sess->se_tpg = se_tpg; | |
293 | se_sess->fabric_sess_ptr = fabric_sess_ptr; | |
294 | /* | |
295 | * Used by struct se_node_acl's under ConfigFS to locate active se_session-t | |
296 | * | |
297 | * Only set for struct se_session's that will actually be moving I/O. | |
298 | * eg: *NOT* discovery sessions. | |
299 | */ | |
300 | if (se_nacl) { | |
301 | /* | |
302 | * If the fabric module supports an ISID based TransportID, | |
303 | * save this value in binary from the fabric I_T Nexus now. | |
304 | */ | |
e3d6f909 | 305 | if (se_tpg->se_tpg_tfo->sess_get_initiator_sid != NULL) { |
c66ac9db | 306 | memset(&buf[0], 0, PR_REG_ISID_LEN); |
e3d6f909 | 307 | se_tpg->se_tpg_tfo->sess_get_initiator_sid(se_sess, |
c66ac9db NB |
308 | &buf[0], PR_REG_ISID_LEN); |
309 | se_sess->sess_bin_isid = get_unaligned_be64(&buf[0]); | |
310 | } | |
311 | spin_lock_irq(&se_nacl->nacl_sess_lock); | |
312 | /* | |
313 | * The se_nacl->nacl_sess pointer will be set to the | |
314 | * last active I_T Nexus for each struct se_node_acl. | |
315 | */ | |
316 | se_nacl->nacl_sess = se_sess; | |
317 | ||
318 | list_add_tail(&se_sess->sess_acl_list, | |
319 | &se_nacl->acl_sess_list); | |
320 | spin_unlock_irq(&se_nacl->nacl_sess_lock); | |
321 | } | |
322 | list_add_tail(&se_sess->sess_list, &se_tpg->tpg_sess_list); | |
323 | ||
6708bb27 | 324 | pr_debug("TARGET_CORE[%s]: Registered fabric_sess_ptr: %p\n", |
e3d6f909 | 325 | se_tpg->se_tpg_tfo->get_fabric_name(), se_sess->fabric_sess_ptr); |
c66ac9db NB |
326 | } |
327 | EXPORT_SYMBOL(__transport_register_session); | |
328 | ||
329 | void transport_register_session( | |
330 | struct se_portal_group *se_tpg, | |
331 | struct se_node_acl *se_nacl, | |
332 | struct se_session *se_sess, | |
333 | void *fabric_sess_ptr) | |
334 | { | |
335 | spin_lock_bh(&se_tpg->session_lock); | |
336 | __transport_register_session(se_tpg, se_nacl, se_sess, fabric_sess_ptr); | |
337 | spin_unlock_bh(&se_tpg->session_lock); | |
338 | } | |
339 | EXPORT_SYMBOL(transport_register_session); | |
340 | ||
341 | void transport_deregister_session_configfs(struct se_session *se_sess) | |
342 | { | |
343 | struct se_node_acl *se_nacl; | |
23388864 | 344 | unsigned long flags; |
c66ac9db NB |
345 | /* |
346 | * Used by struct se_node_acl's under ConfigFS to locate active struct se_session | |
347 | */ | |
348 | se_nacl = se_sess->se_node_acl; | |
6708bb27 | 349 | if (se_nacl) { |
23388864 | 350 | spin_lock_irqsave(&se_nacl->nacl_sess_lock, flags); |
c66ac9db NB |
351 | list_del(&se_sess->sess_acl_list); |
352 | /* | |
353 | * If the session list is empty, then clear the pointer. | |
354 | * Otherwise, set the struct se_session pointer from the tail | |
355 | * element of the per struct se_node_acl active session list. | |
356 | */ | |
357 | if (list_empty(&se_nacl->acl_sess_list)) | |
358 | se_nacl->nacl_sess = NULL; | |
359 | else { | |
360 | se_nacl->nacl_sess = container_of( | |
361 | se_nacl->acl_sess_list.prev, | |
362 | struct se_session, sess_acl_list); | |
363 | } | |
23388864 | 364 | spin_unlock_irqrestore(&se_nacl->nacl_sess_lock, flags); |
c66ac9db NB |
365 | } |
366 | } | |
367 | EXPORT_SYMBOL(transport_deregister_session_configfs); | |
368 | ||
369 | void transport_free_session(struct se_session *se_sess) | |
370 | { | |
371 | kmem_cache_free(se_sess_cache, se_sess); | |
372 | } | |
373 | EXPORT_SYMBOL(transport_free_session); | |
374 | ||
375 | void transport_deregister_session(struct se_session *se_sess) | |
376 | { | |
377 | struct se_portal_group *se_tpg = se_sess->se_tpg; | |
378 | struct se_node_acl *se_nacl; | |
e63a8e19 | 379 | unsigned long flags; |
c66ac9db | 380 | |
6708bb27 | 381 | if (!se_tpg) { |
c66ac9db NB |
382 | transport_free_session(se_sess); |
383 | return; | |
384 | } | |
c66ac9db | 385 | |
e63a8e19 | 386 | spin_lock_irqsave(&se_tpg->session_lock, flags); |
c66ac9db NB |
387 | list_del(&se_sess->sess_list); |
388 | se_sess->se_tpg = NULL; | |
389 | se_sess->fabric_sess_ptr = NULL; | |
e63a8e19 | 390 | spin_unlock_irqrestore(&se_tpg->session_lock, flags); |
c66ac9db NB |
391 | |
392 | /* | |
393 | * Determine if we need to do extra work for this initiator node's | |
394 | * struct se_node_acl if it had been previously dynamically generated. | |
395 | */ | |
396 | se_nacl = se_sess->se_node_acl; | |
6708bb27 | 397 | if (se_nacl) { |
e63a8e19 | 398 | spin_lock_irqsave(&se_tpg->acl_node_lock, flags); |
c66ac9db | 399 | if (se_nacl->dynamic_node_acl) { |
6708bb27 AG |
400 | if (!se_tpg->se_tpg_tfo->tpg_check_demo_mode_cache( |
401 | se_tpg)) { | |
c66ac9db NB |
402 | list_del(&se_nacl->acl_list); |
403 | se_tpg->num_node_acls--; | |
e63a8e19 | 404 | spin_unlock_irqrestore(&se_tpg->acl_node_lock, flags); |
c66ac9db NB |
405 | |
406 | core_tpg_wait_for_nacl_pr_ref(se_nacl); | |
c66ac9db | 407 | core_free_device_list_for_node(se_nacl, se_tpg); |
e3d6f909 | 408 | se_tpg->se_tpg_tfo->tpg_release_fabric_acl(se_tpg, |
c66ac9db | 409 | se_nacl); |
e63a8e19 | 410 | spin_lock_irqsave(&se_tpg->acl_node_lock, flags); |
c66ac9db NB |
411 | } |
412 | } | |
e63a8e19 | 413 | spin_unlock_irqrestore(&se_tpg->acl_node_lock, flags); |
c66ac9db NB |
414 | } |
415 | ||
416 | transport_free_session(se_sess); | |
417 | ||
6708bb27 | 418 | pr_debug("TARGET_CORE[%s]: Deregistered fabric_sess\n", |
e3d6f909 | 419 | se_tpg->se_tpg_tfo->get_fabric_name()); |
c66ac9db NB |
420 | } |
421 | EXPORT_SYMBOL(transport_deregister_session); | |
422 | ||
423 | /* | |
a1d8b49a | 424 | * Called with cmd->t_state_lock held. |
c66ac9db NB |
425 | */ |
426 | static void transport_all_task_dev_remove_state(struct se_cmd *cmd) | |
427 | { | |
42bf829e | 428 | struct se_device *dev = cmd->se_dev; |
c66ac9db NB |
429 | struct se_task *task; |
430 | unsigned long flags; | |
431 | ||
42bf829e CH |
432 | if (!dev) |
433 | return; | |
c66ac9db | 434 | |
42bf829e | 435 | list_for_each_entry(task, &cmd->t_task_list, t_list) { |
6c76bf95 | 436 | if (task->task_flags & TF_ACTIVE) |
c66ac9db NB |
437 | continue; |
438 | ||
6708bb27 | 439 | if (!atomic_read(&task->task_state_active)) |
c66ac9db NB |
440 | continue; |
441 | ||
442 | spin_lock_irqsave(&dev->execute_task_lock, flags); | |
443 | list_del(&task->t_state_list); | |
6708bb27 AG |
444 | pr_debug("Removed ITT: 0x%08x dev: %p task[%p]\n", |
445 | cmd->se_tfo->get_task_tag(cmd), dev, task); | |
c66ac9db NB |
446 | spin_unlock_irqrestore(&dev->execute_task_lock, flags); |
447 | ||
448 | atomic_set(&task->task_state_active, 0); | |
a1d8b49a | 449 | atomic_dec(&cmd->t_task_cdbs_ex_left); |
c66ac9db NB |
450 | } |
451 | } | |
452 | ||
453 | /* transport_cmd_check_stop(): | |
454 | * | |
455 | * 'transport_off = 1' determines if t_transport_active should be cleared. | |
456 | * 'transport_off = 2' determines if task_dev_state should be removed. | |
457 | * | |
458 | * A non-zero u8 t_state sets cmd->t_state. | |
459 | * Returns 1 when command is stopped, else 0. | |
460 | */ | |
461 | static int transport_cmd_check_stop( | |
462 | struct se_cmd *cmd, | |
463 | int transport_off, | |
464 | u8 t_state) | |
465 | { | |
466 | unsigned long flags; | |
467 | ||
a1d8b49a | 468 | spin_lock_irqsave(&cmd->t_state_lock, flags); |
c66ac9db NB |
469 | /* |
470 | * Determine if IOCTL context caller in requesting the stopping of this | |
471 | * command for LUN shutdown purposes. | |
472 | */ | |
a1d8b49a | 473 | if (atomic_read(&cmd->transport_lun_stop)) { |
6708bb27 | 474 | pr_debug("%s:%d atomic_read(&cmd->transport_lun_stop)" |
c66ac9db | 475 | " == TRUE for ITT: 0x%08x\n", __func__, __LINE__, |
e3d6f909 | 476 | cmd->se_tfo->get_task_tag(cmd)); |
c66ac9db | 477 | |
a1d8b49a | 478 | atomic_set(&cmd->t_transport_active, 0); |
c66ac9db NB |
479 | if (transport_off == 2) |
480 | transport_all_task_dev_remove_state(cmd); | |
a1d8b49a | 481 | spin_unlock_irqrestore(&cmd->t_state_lock, flags); |
c66ac9db | 482 | |
a1d8b49a | 483 | complete(&cmd->transport_lun_stop_comp); |
c66ac9db NB |
484 | return 1; |
485 | } | |
486 | /* | |
487 | * Determine if frontend context caller is requesting the stopping of | |
e3d6f909 | 488 | * this command for frontend exceptions. |
c66ac9db | 489 | */ |
a1d8b49a | 490 | if (atomic_read(&cmd->t_transport_stop)) { |
6708bb27 | 491 | pr_debug("%s:%d atomic_read(&cmd->t_transport_stop) ==" |
c66ac9db | 492 | " TRUE for ITT: 0x%08x\n", __func__, __LINE__, |
e3d6f909 | 493 | cmd->se_tfo->get_task_tag(cmd)); |
c66ac9db | 494 | |
c66ac9db NB |
495 | if (transport_off == 2) |
496 | transport_all_task_dev_remove_state(cmd); | |
497 | ||
498 | /* | |
499 | * Clear struct se_cmd->se_lun before the transport_off == 2 handoff | |
500 | * to FE. | |
501 | */ | |
502 | if (transport_off == 2) | |
503 | cmd->se_lun = NULL; | |
a1d8b49a | 504 | spin_unlock_irqrestore(&cmd->t_state_lock, flags); |
c66ac9db | 505 | |
a1d8b49a | 506 | complete(&cmd->t_transport_stop_comp); |
c66ac9db NB |
507 | return 1; |
508 | } | |
509 | if (transport_off) { | |
a1d8b49a | 510 | atomic_set(&cmd->t_transport_active, 0); |
c66ac9db NB |
511 | if (transport_off == 2) { |
512 | transport_all_task_dev_remove_state(cmd); | |
513 | /* | |
514 | * Clear struct se_cmd->se_lun before the transport_off == 2 | |
515 | * handoff to fabric module. | |
516 | */ | |
517 | cmd->se_lun = NULL; | |
518 | /* | |
519 | * Some fabric modules like tcm_loop can release | |
25985edc | 520 | * their internally allocated I/O reference now and |
c66ac9db NB |
521 | * struct se_cmd now. |
522 | */ | |
e3d6f909 | 523 | if (cmd->se_tfo->check_stop_free != NULL) { |
c66ac9db | 524 | spin_unlock_irqrestore( |
a1d8b49a | 525 | &cmd->t_state_lock, flags); |
c66ac9db | 526 | |
e3d6f909 | 527 | cmd->se_tfo->check_stop_free(cmd); |
c66ac9db NB |
528 | return 1; |
529 | } | |
530 | } | |
a1d8b49a | 531 | spin_unlock_irqrestore(&cmd->t_state_lock, flags); |
c66ac9db NB |
532 | |
533 | return 0; | |
534 | } else if (t_state) | |
535 | cmd->t_state = t_state; | |
a1d8b49a | 536 | spin_unlock_irqrestore(&cmd->t_state_lock, flags); |
c66ac9db NB |
537 | |
538 | return 0; | |
539 | } | |
540 | ||
541 | static int transport_cmd_check_stop_to_fabric(struct se_cmd *cmd) | |
542 | { | |
543 | return transport_cmd_check_stop(cmd, 2, 0); | |
544 | } | |
545 | ||
546 | static void transport_lun_remove_cmd(struct se_cmd *cmd) | |
547 | { | |
e3d6f909 | 548 | struct se_lun *lun = cmd->se_lun; |
c66ac9db NB |
549 | unsigned long flags; |
550 | ||
551 | if (!lun) | |
552 | return; | |
553 | ||
a1d8b49a | 554 | spin_lock_irqsave(&cmd->t_state_lock, flags); |
6708bb27 | 555 | if (!atomic_read(&cmd->transport_dev_active)) { |
a1d8b49a | 556 | spin_unlock_irqrestore(&cmd->t_state_lock, flags); |
c66ac9db NB |
557 | goto check_lun; |
558 | } | |
a1d8b49a | 559 | atomic_set(&cmd->transport_dev_active, 0); |
c66ac9db | 560 | transport_all_task_dev_remove_state(cmd); |
a1d8b49a | 561 | spin_unlock_irqrestore(&cmd->t_state_lock, flags); |
c66ac9db | 562 | |
c66ac9db NB |
563 | |
564 | check_lun: | |
565 | spin_lock_irqsave(&lun->lun_cmd_lock, flags); | |
a1d8b49a | 566 | if (atomic_read(&cmd->transport_lun_active)) { |
5951146d | 567 | list_del(&cmd->se_lun_node); |
a1d8b49a | 568 | atomic_set(&cmd->transport_lun_active, 0); |
c66ac9db | 569 | #if 0 |
6708bb27 | 570 | pr_debug("Removed ITT: 0x%08x from LUN LIST[%d]\n" |
e3d6f909 | 571 | cmd->se_tfo->get_task_tag(cmd), lun->unpacked_lun); |
c66ac9db NB |
572 | #endif |
573 | } | |
574 | spin_unlock_irqrestore(&lun->lun_cmd_lock, flags); | |
575 | } | |
576 | ||
577 | void transport_cmd_finish_abort(struct se_cmd *cmd, int remove) | |
578 | { | |
8dc52b54 NB |
579 | if (!cmd->se_tmr_req) |
580 | transport_lun_remove_cmd(cmd); | |
c66ac9db NB |
581 | |
582 | if (transport_cmd_check_stop_to_fabric(cmd)) | |
583 | return; | |
77039d1e | 584 | if (remove) { |
3df8d40b | 585 | transport_remove_cmd_from_queue(cmd); |
e6a2573f | 586 | transport_put_cmd(cmd); |
77039d1e | 587 | } |
c66ac9db NB |
588 | } |
589 | ||
f7a5cc0b CH |
590 | static void transport_add_cmd_to_queue(struct se_cmd *cmd, int t_state, |
591 | bool at_head) | |
c66ac9db NB |
592 | { |
593 | struct se_device *dev = cmd->se_dev; | |
e3d6f909 | 594 | struct se_queue_obj *qobj = &dev->dev_queue_obj; |
c66ac9db NB |
595 | unsigned long flags; |
596 | ||
c66ac9db | 597 | if (t_state) { |
a1d8b49a | 598 | spin_lock_irqsave(&cmd->t_state_lock, flags); |
c66ac9db | 599 | cmd->t_state = t_state; |
a1d8b49a AG |
600 | atomic_set(&cmd->t_transport_active, 1); |
601 | spin_unlock_irqrestore(&cmd->t_state_lock, flags); | |
c66ac9db NB |
602 | } |
603 | ||
604 | spin_lock_irqsave(&qobj->cmd_queue_lock, flags); | |
79a7fef2 RD |
605 | |
606 | /* If the cmd is already on the list, remove it before we add it */ | |
607 | if (!list_empty(&cmd->se_queue_node)) | |
608 | list_del(&cmd->se_queue_node); | |
609 | else | |
610 | atomic_inc(&qobj->queue_cnt); | |
611 | ||
f7a5cc0b | 612 | if (at_head) |
07bde79a | 613 | list_add(&cmd->se_queue_node, &qobj->qobj_list); |
f7a5cc0b | 614 | else |
07bde79a | 615 | list_add_tail(&cmd->se_queue_node, &qobj->qobj_list); |
79a7fef2 | 616 | atomic_set(&cmd->t_transport_queue_active, 1); |
c66ac9db NB |
617 | spin_unlock_irqrestore(&qobj->cmd_queue_lock, flags); |
618 | ||
c66ac9db | 619 | wake_up_interruptible(&qobj->thread_wq); |
c66ac9db NB |
620 | } |
621 | ||
5951146d AG |
622 | static struct se_cmd * |
623 | transport_get_cmd_from_queue(struct se_queue_obj *qobj) | |
c66ac9db | 624 | { |
5951146d | 625 | struct se_cmd *cmd; |
c66ac9db NB |
626 | unsigned long flags; |
627 | ||
628 | spin_lock_irqsave(&qobj->cmd_queue_lock, flags); | |
629 | if (list_empty(&qobj->qobj_list)) { | |
630 | spin_unlock_irqrestore(&qobj->cmd_queue_lock, flags); | |
631 | return NULL; | |
632 | } | |
5951146d | 633 | cmd = list_first_entry(&qobj->qobj_list, struct se_cmd, se_queue_node); |
c66ac9db | 634 | |
79a7fef2 | 635 | atomic_set(&cmd->t_transport_queue_active, 0); |
c66ac9db | 636 | |
79a7fef2 | 637 | list_del_init(&cmd->se_queue_node); |
c66ac9db NB |
638 | atomic_dec(&qobj->queue_cnt); |
639 | spin_unlock_irqrestore(&qobj->cmd_queue_lock, flags); | |
640 | ||
5951146d | 641 | return cmd; |
c66ac9db NB |
642 | } |
643 | ||
3df8d40b | 644 | static void transport_remove_cmd_from_queue(struct se_cmd *cmd) |
c66ac9db | 645 | { |
3df8d40b | 646 | struct se_queue_obj *qobj = &cmd->se_dev->dev_queue_obj; |
c66ac9db NB |
647 | unsigned long flags; |
648 | ||
649 | spin_lock_irqsave(&qobj->cmd_queue_lock, flags); | |
6708bb27 | 650 | if (!atomic_read(&cmd->t_transport_queue_active)) { |
c66ac9db NB |
651 | spin_unlock_irqrestore(&qobj->cmd_queue_lock, flags); |
652 | return; | |
653 | } | |
79a7fef2 RD |
654 | atomic_set(&cmd->t_transport_queue_active, 0); |
655 | atomic_dec(&qobj->queue_cnt); | |
656 | list_del_init(&cmd->se_queue_node); | |
c66ac9db NB |
657 | spin_unlock_irqrestore(&qobj->cmd_queue_lock, flags); |
658 | ||
a1d8b49a | 659 | if (atomic_read(&cmd->t_transport_queue_active)) { |
6708bb27 | 660 | pr_err("ITT: 0x%08x t_transport_queue_active: %d\n", |
e3d6f909 | 661 | cmd->se_tfo->get_task_tag(cmd), |
a1d8b49a | 662 | atomic_read(&cmd->t_transport_queue_active)); |
c66ac9db NB |
663 | } |
664 | } | |
665 | ||
666 | /* | |
667 | * Completion function used by TCM subsystem plugins (such as FILEIO) | |
668 | * for queueing up response from struct se_subsystem_api->do_task() | |
669 | */ | |
670 | void transport_complete_sync_cache(struct se_cmd *cmd, int good) | |
671 | { | |
a1d8b49a | 672 | struct se_task *task = list_entry(cmd->t_task_list.next, |
c66ac9db NB |
673 | struct se_task, t_list); |
674 | ||
675 | if (good) { | |
676 | cmd->scsi_status = SAM_STAT_GOOD; | |
677 | task->task_scsi_status = GOOD; | |
678 | } else { | |
679 | task->task_scsi_status = SAM_STAT_CHECK_CONDITION; | |
680 | task->task_error_status = PYX_TRANSPORT_ILLEGAL_REQUEST; | |
e3d6f909 | 681 | task->task_se_cmd->transport_error_status = |
c66ac9db NB |
682 | PYX_TRANSPORT_ILLEGAL_REQUEST; |
683 | } | |
684 | ||
685 | transport_complete_task(task, good); | |
686 | } | |
687 | EXPORT_SYMBOL(transport_complete_sync_cache); | |
688 | ||
35e0e757 CH |
689 | static void target_complete_timeout_work(struct work_struct *work) |
690 | { | |
691 | struct se_cmd *cmd = container_of(work, struct se_cmd, work); | |
692 | unsigned long flags; | |
693 | ||
694 | /* | |
695 | * Reset cmd->t_se_count to allow transport_put_cmd() | |
696 | * to allow last call to free memory resources. | |
697 | */ | |
698 | spin_lock_irqsave(&cmd->t_state_lock, flags); | |
699 | if (atomic_read(&cmd->t_transport_timeout) > 1) { | |
700 | int tmp = (atomic_read(&cmd->t_transport_timeout) - 1); | |
701 | ||
702 | atomic_sub(tmp, &cmd->t_se_count); | |
703 | } | |
704 | spin_unlock_irqrestore(&cmd->t_state_lock, flags); | |
705 | ||
706 | transport_put_cmd(cmd); | |
707 | } | |
708 | ||
709 | static void target_complete_failure_work(struct work_struct *work) | |
710 | { | |
711 | struct se_cmd *cmd = container_of(work, struct se_cmd, work); | |
712 | ||
713 | transport_generic_request_failure(cmd, 1, 1); | |
714 | } | |
715 | ||
c66ac9db NB |
716 | /* transport_complete_task(): |
717 | * | |
718 | * Called from interrupt and non interrupt context depending | |
719 | * on the transport plugin. | |
720 | */ | |
721 | void transport_complete_task(struct se_task *task, int success) | |
722 | { | |
e3d6f909 | 723 | struct se_cmd *cmd = task->task_se_cmd; |
42bf829e | 724 | struct se_device *dev = cmd->se_dev; |
c66ac9db NB |
725 | unsigned long flags; |
726 | #if 0 | |
6708bb27 | 727 | pr_debug("task: %p CDB: 0x%02x obj_ptr: %p\n", task, |
a1d8b49a | 728 | cmd->t_task_cdb[0], dev); |
c66ac9db | 729 | #endif |
e3d6f909 | 730 | if (dev) |
c66ac9db | 731 | atomic_inc(&dev->depth_left); |
c66ac9db | 732 | |
cc5d0f0f CH |
733 | del_timer(&task->task_timer); |
734 | ||
a1d8b49a | 735 | spin_lock_irqsave(&cmd->t_state_lock, flags); |
6c76bf95 | 736 | task->task_flags &= ~TF_ACTIVE; |
c66ac9db NB |
737 | |
738 | /* | |
739 | * See if any sense data exists, if so set the TASK_SENSE flag. | |
740 | * Also check for any other post completion work that needs to be | |
741 | * done by the plugins. | |
742 | */ | |
743 | if (dev && dev->transport->transport_complete) { | |
744 | if (dev->transport->transport_complete(task) != 0) { | |
745 | cmd->se_cmd_flags |= SCF_TRANSPORT_TASK_SENSE; | |
746 | task->task_sense = 1; | |
747 | success = 1; | |
748 | } | |
749 | } | |
750 | ||
751 | /* | |
752 | * See if we are waiting for outstanding struct se_task | |
753 | * to complete for an exception condition | |
754 | */ | |
6c76bf95 | 755 | if (task->task_flags & TF_REQUEST_STOP) { |
c66ac9db | 756 | /* |
a1d8b49a | 757 | * Decrement cmd->t_se_count if this task had |
c66ac9db NB |
758 | * previously thrown its timeout exception handler. |
759 | */ | |
6c76bf95 | 760 | if (task->task_flags & TF_TIMEOUT) { |
a1d8b49a | 761 | atomic_dec(&cmd->t_se_count); |
6c76bf95 | 762 | task->task_flags &= ~TF_TIMEOUT; |
c66ac9db | 763 | } |
a1d8b49a | 764 | spin_unlock_irqrestore(&cmd->t_state_lock, flags); |
c66ac9db NB |
765 | |
766 | complete(&task->task_stop_comp); | |
767 | return; | |
768 | } | |
769 | /* | |
770 | * If the task's timeout handler has fired, use the t_task_cdbs_timeout | |
771 | * left counter to determine when the struct se_cmd is ready to be queued to | |
772 | * the processing thread. | |
773 | */ | |
6c76bf95 | 774 | if (task->task_flags & TF_TIMEOUT) { |
35e0e757 CH |
775 | if (!atomic_dec_and_test(&cmd->t_task_cdbs_timeout_left)) { |
776 | spin_unlock_irqrestore(&cmd->t_state_lock, flags); | |
c66ac9db NB |
777 | return; |
778 | } | |
35e0e757 CH |
779 | INIT_WORK(&cmd->work, target_complete_timeout_work); |
780 | goto out_queue; | |
c66ac9db | 781 | } |
a1d8b49a | 782 | atomic_dec(&cmd->t_task_cdbs_timeout_left); |
c66ac9db NB |
783 | |
784 | /* | |
785 | * Decrement the outstanding t_task_cdbs_left count. The last | |
786 | * struct se_task from struct se_cmd will complete itself into the | |
787 | * device queue depending upon int success. | |
788 | */ | |
6708bb27 | 789 | if (!atomic_dec_and_test(&cmd->t_task_cdbs_left)) { |
a1d8b49a | 790 | spin_unlock_irqrestore(&cmd->t_state_lock, flags); |
c66ac9db NB |
791 | return; |
792 | } | |
793 | ||
a1d8b49a | 794 | if (!success || cmd->t_tasks_failed) { |
c66ac9db NB |
795 | if (!task->task_error_status) { |
796 | task->task_error_status = | |
797 | PYX_TRANSPORT_UNKNOWN_SAM_OPCODE; | |
798 | cmd->transport_error_status = | |
799 | PYX_TRANSPORT_UNKNOWN_SAM_OPCODE; | |
800 | } | |
35e0e757 | 801 | INIT_WORK(&cmd->work, target_complete_failure_work); |
c66ac9db | 802 | } else { |
a1d8b49a | 803 | atomic_set(&cmd->t_transport_complete, 1); |
35e0e757 | 804 | INIT_WORK(&cmd->work, target_complete_ok_work); |
c66ac9db | 805 | } |
35e0e757 CH |
806 | |
807 | out_queue: | |
808 | cmd->t_state = TRANSPORT_COMPLETE; | |
809 | atomic_set(&cmd->t_transport_active, 1); | |
a1d8b49a | 810 | spin_unlock_irqrestore(&cmd->t_state_lock, flags); |
c66ac9db | 811 | |
35e0e757 | 812 | queue_work(target_completion_wq, &cmd->work); |
c66ac9db NB |
813 | } |
814 | EXPORT_SYMBOL(transport_complete_task); | |
815 | ||
816 | /* | |
817 | * Called by transport_add_tasks_from_cmd() once a struct se_cmd's | |
818 | * struct se_task list are ready to be added to the active execution list | |
819 | * struct se_device | |
820 | ||
821 | * Called with se_dev_t->execute_task_lock called. | |
822 | */ | |
823 | static inline int transport_add_task_check_sam_attr( | |
824 | struct se_task *task, | |
825 | struct se_task *task_prev, | |
826 | struct se_device *dev) | |
827 | { | |
828 | /* | |
829 | * No SAM Task attribute emulation enabled, add to tail of | |
830 | * execution queue | |
831 | */ | |
832 | if (dev->dev_task_attr_type != SAM_TASK_ATTR_EMULATED) { | |
833 | list_add_tail(&task->t_execute_list, &dev->execute_task_list); | |
834 | return 0; | |
835 | } | |
836 | /* | |
837 | * HEAD_OF_QUEUE attribute for received CDB, which means | |
838 | * the first task that is associated with a struct se_cmd goes to | |
839 | * head of the struct se_device->execute_task_list, and task_prev | |
840 | * after that for each subsequent task | |
841 | */ | |
e66ecd50 | 842 | if (task->task_se_cmd->sam_task_attr == MSG_HEAD_TAG) { |
c66ac9db NB |
843 | list_add(&task->t_execute_list, |
844 | (task_prev != NULL) ? | |
845 | &task_prev->t_execute_list : | |
846 | &dev->execute_task_list); | |
847 | ||
6708bb27 | 848 | pr_debug("Set HEAD_OF_QUEUE for task CDB: 0x%02x" |
c66ac9db | 849 | " in execution queue\n", |
6708bb27 | 850 | task->task_se_cmd->t_task_cdb[0]); |
c66ac9db NB |
851 | return 1; |
852 | } | |
853 | /* | |
854 | * For ORDERED, SIMPLE or UNTAGGED attribute tasks once they have been | |
855 | * transitioned from Dermant -> Active state, and are added to the end | |
856 | * of the struct se_device->execute_task_list | |
857 | */ | |
858 | list_add_tail(&task->t_execute_list, &dev->execute_task_list); | |
859 | return 0; | |
860 | } | |
861 | ||
862 | /* __transport_add_task_to_execute_queue(): | |
863 | * | |
864 | * Called with se_dev_t->execute_task_lock called. | |
865 | */ | |
866 | static void __transport_add_task_to_execute_queue( | |
867 | struct se_task *task, | |
868 | struct se_task *task_prev, | |
869 | struct se_device *dev) | |
870 | { | |
871 | int head_of_queue; | |
872 | ||
873 | head_of_queue = transport_add_task_check_sam_attr(task, task_prev, dev); | |
874 | atomic_inc(&dev->execute_tasks); | |
875 | ||
876 | if (atomic_read(&task->task_state_active)) | |
877 | return; | |
878 | /* | |
879 | * Determine if this task needs to go to HEAD_OF_QUEUE for the | |
880 | * state list as well. Running with SAM Task Attribute emulation | |
881 | * will always return head_of_queue == 0 here | |
882 | */ | |
883 | if (head_of_queue) | |
884 | list_add(&task->t_state_list, (task_prev) ? | |
885 | &task_prev->t_state_list : | |
886 | &dev->state_task_list); | |
887 | else | |
888 | list_add_tail(&task->t_state_list, &dev->state_task_list); | |
889 | ||
890 | atomic_set(&task->task_state_active, 1); | |
891 | ||
6708bb27 | 892 | pr_debug("Added ITT: 0x%08x task[%p] to dev: %p\n", |
e3d6f909 | 893 | task->task_se_cmd->se_tfo->get_task_tag(task->task_se_cmd), |
c66ac9db NB |
894 | task, dev); |
895 | } | |
896 | ||
897 | static void transport_add_tasks_to_state_queue(struct se_cmd *cmd) | |
898 | { | |
42bf829e | 899 | struct se_device *dev = cmd->se_dev; |
c66ac9db NB |
900 | struct se_task *task; |
901 | unsigned long flags; | |
902 | ||
a1d8b49a AG |
903 | spin_lock_irqsave(&cmd->t_state_lock, flags); |
904 | list_for_each_entry(task, &cmd->t_task_list, t_list) { | |
c66ac9db NB |
905 | if (atomic_read(&task->task_state_active)) |
906 | continue; | |
907 | ||
908 | spin_lock(&dev->execute_task_lock); | |
909 | list_add_tail(&task->t_state_list, &dev->state_task_list); | |
910 | atomic_set(&task->task_state_active, 1); | |
911 | ||
6708bb27 AG |
912 | pr_debug("Added ITT: 0x%08x task[%p] to dev: %p\n", |
913 | task->task_se_cmd->se_tfo->get_task_tag( | |
c66ac9db NB |
914 | task->task_se_cmd), task, dev); |
915 | ||
916 | spin_unlock(&dev->execute_task_lock); | |
917 | } | |
a1d8b49a | 918 | spin_unlock_irqrestore(&cmd->t_state_lock, flags); |
c66ac9db NB |
919 | } |
920 | ||
921 | static void transport_add_tasks_from_cmd(struct se_cmd *cmd) | |
922 | { | |
5951146d | 923 | struct se_device *dev = cmd->se_dev; |
c66ac9db NB |
924 | struct se_task *task, *task_prev = NULL; |
925 | unsigned long flags; | |
926 | ||
927 | spin_lock_irqsave(&dev->execute_task_lock, flags); | |
a1d8b49a | 928 | list_for_each_entry(task, &cmd->t_task_list, t_list) { |
04629b7b | 929 | if (!list_empty(&task->t_execute_list)) |
c66ac9db NB |
930 | continue; |
931 | /* | |
932 | * __transport_add_task_to_execute_queue() handles the | |
933 | * SAM Task Attribute emulation if enabled | |
934 | */ | |
935 | __transport_add_task_to_execute_queue(task, task_prev, dev); | |
c66ac9db NB |
936 | task_prev = task; |
937 | } | |
938 | spin_unlock_irqrestore(&dev->execute_task_lock, flags); | |
c66ac9db NB |
939 | } |
940 | ||
04629b7b CH |
941 | void __transport_remove_task_from_execute_queue(struct se_task *task, |
942 | struct se_device *dev) | |
943 | { | |
944 | list_del_init(&task->t_execute_list); | |
945 | atomic_dec(&dev->execute_tasks); | |
946 | } | |
947 | ||
52208ae3 | 948 | void transport_remove_task_from_execute_queue( |
c66ac9db NB |
949 | struct se_task *task, |
950 | struct se_device *dev) | |
951 | { | |
952 | unsigned long flags; | |
953 | ||
04629b7b | 954 | if (WARN_ON(list_empty(&task->t_execute_list))) |
af57c3ac | 955 | return; |
af57c3ac | 956 | |
c66ac9db | 957 | spin_lock_irqsave(&dev->execute_task_lock, flags); |
04629b7b | 958 | __transport_remove_task_from_execute_queue(task, dev); |
c66ac9db NB |
959 | spin_unlock_irqrestore(&dev->execute_task_lock, flags); |
960 | } | |
961 | ||
07bde79a NB |
962 | /* |
963 | * Handle QUEUE_FULL / -EAGAIN status | |
964 | */ | |
965 | ||
966 | static void target_qf_do_work(struct work_struct *work) | |
967 | { | |
968 | struct se_device *dev = container_of(work, struct se_device, | |
969 | qf_work_queue); | |
bcac364a | 970 | LIST_HEAD(qf_cmd_list); |
07bde79a NB |
971 | struct se_cmd *cmd, *cmd_tmp; |
972 | ||
973 | spin_lock_irq(&dev->qf_cmd_lock); | |
bcac364a RD |
974 | list_splice_init(&dev->qf_cmd_list, &qf_cmd_list); |
975 | spin_unlock_irq(&dev->qf_cmd_lock); | |
07bde79a | 976 | |
bcac364a | 977 | list_for_each_entry_safe(cmd, cmd_tmp, &qf_cmd_list, se_qf_node) { |
07bde79a NB |
978 | list_del(&cmd->se_qf_node); |
979 | atomic_dec(&dev->dev_qf_count); | |
980 | smp_mb__after_atomic_dec(); | |
07bde79a | 981 | |
6708bb27 | 982 | pr_debug("Processing %s cmd: %p QUEUE_FULL in work queue" |
07bde79a | 983 | " context: %s\n", cmd->se_tfo->get_fabric_name(), cmd, |
e057f533 | 984 | (cmd->t_state == TRANSPORT_COMPLETE_QF_OK) ? "COMPLETE_OK" : |
07bde79a NB |
985 | (cmd->t_state == TRANSPORT_COMPLETE_QF_WP) ? "WRITE_PENDING" |
986 | : "UNKNOWN"); | |
f7a5cc0b CH |
987 | |
988 | transport_add_cmd_to_queue(cmd, cmd->t_state, true); | |
07bde79a | 989 | } |
07bde79a NB |
990 | } |
991 | ||
c66ac9db NB |
992 | unsigned char *transport_dump_cmd_direction(struct se_cmd *cmd) |
993 | { | |
994 | switch (cmd->data_direction) { | |
995 | case DMA_NONE: | |
996 | return "NONE"; | |
997 | case DMA_FROM_DEVICE: | |
998 | return "READ"; | |
999 | case DMA_TO_DEVICE: | |
1000 | return "WRITE"; | |
1001 | case DMA_BIDIRECTIONAL: | |
1002 | return "BIDI"; | |
1003 | default: | |
1004 | break; | |
1005 | } | |
1006 | ||
1007 | return "UNKNOWN"; | |
1008 | } | |
1009 | ||
1010 | void transport_dump_dev_state( | |
1011 | struct se_device *dev, | |
1012 | char *b, | |
1013 | int *bl) | |
1014 | { | |
1015 | *bl += sprintf(b + *bl, "Status: "); | |
1016 | switch (dev->dev_status) { | |
1017 | case TRANSPORT_DEVICE_ACTIVATED: | |
1018 | *bl += sprintf(b + *bl, "ACTIVATED"); | |
1019 | break; | |
1020 | case TRANSPORT_DEVICE_DEACTIVATED: | |
1021 | *bl += sprintf(b + *bl, "DEACTIVATED"); | |
1022 | break; | |
1023 | case TRANSPORT_DEVICE_SHUTDOWN: | |
1024 | *bl += sprintf(b + *bl, "SHUTDOWN"); | |
1025 | break; | |
1026 | case TRANSPORT_DEVICE_OFFLINE_ACTIVATED: | |
1027 | case TRANSPORT_DEVICE_OFFLINE_DEACTIVATED: | |
1028 | *bl += sprintf(b + *bl, "OFFLINE"); | |
1029 | break; | |
1030 | default: | |
1031 | *bl += sprintf(b + *bl, "UNKNOWN=%d", dev->dev_status); | |
1032 | break; | |
1033 | } | |
1034 | ||
1035 | *bl += sprintf(b + *bl, " Execute/Left/Max Queue Depth: %d/%d/%d", | |
1036 | atomic_read(&dev->execute_tasks), atomic_read(&dev->depth_left), | |
1037 | dev->queue_depth); | |
1038 | *bl += sprintf(b + *bl, " SectorSize: %u MaxSectors: %u\n", | |
e3d6f909 | 1039 | dev->se_sub_dev->se_dev_attrib.block_size, dev->se_sub_dev->se_dev_attrib.max_sectors); |
c66ac9db NB |
1040 | *bl += sprintf(b + *bl, " "); |
1041 | } | |
1042 | ||
c66ac9db NB |
1043 | void transport_dump_vpd_proto_id( |
1044 | struct t10_vpd *vpd, | |
1045 | unsigned char *p_buf, | |
1046 | int p_buf_len) | |
1047 | { | |
1048 | unsigned char buf[VPD_TMP_BUF_SIZE]; | |
1049 | int len; | |
1050 | ||
1051 | memset(buf, 0, VPD_TMP_BUF_SIZE); | |
1052 | len = sprintf(buf, "T10 VPD Protocol Identifier: "); | |
1053 | ||
1054 | switch (vpd->protocol_identifier) { | |
1055 | case 0x00: | |
1056 | sprintf(buf+len, "Fibre Channel\n"); | |
1057 | break; | |
1058 | case 0x10: | |
1059 | sprintf(buf+len, "Parallel SCSI\n"); | |
1060 | break; | |
1061 | case 0x20: | |
1062 | sprintf(buf+len, "SSA\n"); | |
1063 | break; | |
1064 | case 0x30: | |
1065 | sprintf(buf+len, "IEEE 1394\n"); | |
1066 | break; | |
1067 | case 0x40: | |
1068 | sprintf(buf+len, "SCSI Remote Direct Memory Access" | |
1069 | " Protocol\n"); | |
1070 | break; | |
1071 | case 0x50: | |
1072 | sprintf(buf+len, "Internet SCSI (iSCSI)\n"); | |
1073 | break; | |
1074 | case 0x60: | |
1075 | sprintf(buf+len, "SAS Serial SCSI Protocol\n"); | |
1076 | break; | |
1077 | case 0x70: | |
1078 | sprintf(buf+len, "Automation/Drive Interface Transport" | |
1079 | " Protocol\n"); | |
1080 | break; | |
1081 | case 0x80: | |
1082 | sprintf(buf+len, "AT Attachment Interface ATA/ATAPI\n"); | |
1083 | break; | |
1084 | default: | |
1085 | sprintf(buf+len, "Unknown 0x%02x\n", | |
1086 | vpd->protocol_identifier); | |
1087 | break; | |
1088 | } | |
1089 | ||
1090 | if (p_buf) | |
1091 | strncpy(p_buf, buf, p_buf_len); | |
1092 | else | |
6708bb27 | 1093 | pr_debug("%s", buf); |
c66ac9db NB |
1094 | } |
1095 | ||
1096 | void | |
1097 | transport_set_vpd_proto_id(struct t10_vpd *vpd, unsigned char *page_83) | |
1098 | { | |
1099 | /* | |
1100 | * Check if the Protocol Identifier Valid (PIV) bit is set.. | |
1101 | * | |
1102 | * from spc3r23.pdf section 7.5.1 | |
1103 | */ | |
1104 | if (page_83[1] & 0x80) { | |
1105 | vpd->protocol_identifier = (page_83[0] & 0xf0); | |
1106 | vpd->protocol_identifier_set = 1; | |
1107 | transport_dump_vpd_proto_id(vpd, NULL, 0); | |
1108 | } | |
1109 | } | |
1110 | EXPORT_SYMBOL(transport_set_vpd_proto_id); | |
1111 | ||
1112 | int transport_dump_vpd_assoc( | |
1113 | struct t10_vpd *vpd, | |
1114 | unsigned char *p_buf, | |
1115 | int p_buf_len) | |
1116 | { | |
1117 | unsigned char buf[VPD_TMP_BUF_SIZE]; | |
e3d6f909 AG |
1118 | int ret = 0; |
1119 | int len; | |
c66ac9db NB |
1120 | |
1121 | memset(buf, 0, VPD_TMP_BUF_SIZE); | |
1122 | len = sprintf(buf, "T10 VPD Identifier Association: "); | |
1123 | ||
1124 | switch (vpd->association) { | |
1125 | case 0x00: | |
1126 | sprintf(buf+len, "addressed logical unit\n"); | |
1127 | break; | |
1128 | case 0x10: | |
1129 | sprintf(buf+len, "target port\n"); | |
1130 | break; | |
1131 | case 0x20: | |
1132 | sprintf(buf+len, "SCSI target device\n"); | |
1133 | break; | |
1134 | default: | |
1135 | sprintf(buf+len, "Unknown 0x%02x\n", vpd->association); | |
e3d6f909 | 1136 | ret = -EINVAL; |
c66ac9db NB |
1137 | break; |
1138 | } | |
1139 | ||
1140 | if (p_buf) | |
1141 | strncpy(p_buf, buf, p_buf_len); | |
1142 | else | |
6708bb27 | 1143 | pr_debug("%s", buf); |
c66ac9db NB |
1144 | |
1145 | return ret; | |
1146 | } | |
1147 | ||
1148 | int transport_set_vpd_assoc(struct t10_vpd *vpd, unsigned char *page_83) | |
1149 | { | |
1150 | /* | |
1151 | * The VPD identification association.. | |
1152 | * | |
1153 | * from spc3r23.pdf Section 7.6.3.1 Table 297 | |
1154 | */ | |
1155 | vpd->association = (page_83[1] & 0x30); | |
1156 | return transport_dump_vpd_assoc(vpd, NULL, 0); | |
1157 | } | |
1158 | EXPORT_SYMBOL(transport_set_vpd_assoc); | |
1159 | ||
1160 | int transport_dump_vpd_ident_type( | |
1161 | struct t10_vpd *vpd, | |
1162 | unsigned char *p_buf, | |
1163 | int p_buf_len) | |
1164 | { | |
1165 | unsigned char buf[VPD_TMP_BUF_SIZE]; | |
e3d6f909 AG |
1166 | int ret = 0; |
1167 | int len; | |
c66ac9db NB |
1168 | |
1169 | memset(buf, 0, VPD_TMP_BUF_SIZE); | |
1170 | len = sprintf(buf, "T10 VPD Identifier Type: "); | |
1171 | ||
1172 | switch (vpd->device_identifier_type) { | |
1173 | case 0x00: | |
1174 | sprintf(buf+len, "Vendor specific\n"); | |
1175 | break; | |
1176 | case 0x01: | |
1177 | sprintf(buf+len, "T10 Vendor ID based\n"); | |
1178 | break; | |
1179 | case 0x02: | |
1180 | sprintf(buf+len, "EUI-64 based\n"); | |
1181 | break; | |
1182 | case 0x03: | |
1183 | sprintf(buf+len, "NAA\n"); | |
1184 | break; | |
1185 | case 0x04: | |
1186 | sprintf(buf+len, "Relative target port identifier\n"); | |
1187 | break; | |
1188 | case 0x08: | |
1189 | sprintf(buf+len, "SCSI name string\n"); | |
1190 | break; | |
1191 | default: | |
1192 | sprintf(buf+len, "Unsupported: 0x%02x\n", | |
1193 | vpd->device_identifier_type); | |
e3d6f909 | 1194 | ret = -EINVAL; |
c66ac9db NB |
1195 | break; |
1196 | } | |
1197 | ||
e3d6f909 AG |
1198 | if (p_buf) { |
1199 | if (p_buf_len < strlen(buf)+1) | |
1200 | return -EINVAL; | |
c66ac9db | 1201 | strncpy(p_buf, buf, p_buf_len); |
e3d6f909 | 1202 | } else { |
6708bb27 | 1203 | pr_debug("%s", buf); |
e3d6f909 | 1204 | } |
c66ac9db NB |
1205 | |
1206 | return ret; | |
1207 | } | |
1208 | ||
1209 | int transport_set_vpd_ident_type(struct t10_vpd *vpd, unsigned char *page_83) | |
1210 | { | |
1211 | /* | |
1212 | * The VPD identifier type.. | |
1213 | * | |
1214 | * from spc3r23.pdf Section 7.6.3.1 Table 298 | |
1215 | */ | |
1216 | vpd->device_identifier_type = (page_83[1] & 0x0f); | |
1217 | return transport_dump_vpd_ident_type(vpd, NULL, 0); | |
1218 | } | |
1219 | EXPORT_SYMBOL(transport_set_vpd_ident_type); | |
1220 | ||
1221 | int transport_dump_vpd_ident( | |
1222 | struct t10_vpd *vpd, | |
1223 | unsigned char *p_buf, | |
1224 | int p_buf_len) | |
1225 | { | |
1226 | unsigned char buf[VPD_TMP_BUF_SIZE]; | |
1227 | int ret = 0; | |
1228 | ||
1229 | memset(buf, 0, VPD_TMP_BUF_SIZE); | |
1230 | ||
1231 | switch (vpd->device_identifier_code_set) { | |
1232 | case 0x01: /* Binary */ | |
1233 | sprintf(buf, "T10 VPD Binary Device Identifier: %s\n", | |
1234 | &vpd->device_identifier[0]); | |
1235 | break; | |
1236 | case 0x02: /* ASCII */ | |
1237 | sprintf(buf, "T10 VPD ASCII Device Identifier: %s\n", | |
1238 | &vpd->device_identifier[0]); | |
1239 | break; | |
1240 | case 0x03: /* UTF-8 */ | |
1241 | sprintf(buf, "T10 VPD UTF-8 Device Identifier: %s\n", | |
1242 | &vpd->device_identifier[0]); | |
1243 | break; | |
1244 | default: | |
1245 | sprintf(buf, "T10 VPD Device Identifier encoding unsupported:" | |
1246 | " 0x%02x", vpd->device_identifier_code_set); | |
e3d6f909 | 1247 | ret = -EINVAL; |
c66ac9db NB |
1248 | break; |
1249 | } | |
1250 | ||
1251 | if (p_buf) | |
1252 | strncpy(p_buf, buf, p_buf_len); | |
1253 | else | |
6708bb27 | 1254 | pr_debug("%s", buf); |
c66ac9db NB |
1255 | |
1256 | return ret; | |
1257 | } | |
1258 | ||
1259 | int | |
1260 | transport_set_vpd_ident(struct t10_vpd *vpd, unsigned char *page_83) | |
1261 | { | |
1262 | static const char hex_str[] = "0123456789abcdef"; | |
1263 | int j = 0, i = 4; /* offset to start of the identifer */ | |
1264 | ||
1265 | /* | |
1266 | * The VPD Code Set (encoding) | |
1267 | * | |
1268 | * from spc3r23.pdf Section 7.6.3.1 Table 296 | |
1269 | */ | |
1270 | vpd->device_identifier_code_set = (page_83[0] & 0x0f); | |
1271 | switch (vpd->device_identifier_code_set) { | |
1272 | case 0x01: /* Binary */ | |
1273 | vpd->device_identifier[j++] = | |
1274 | hex_str[vpd->device_identifier_type]; | |
1275 | while (i < (4 + page_83[3])) { | |
1276 | vpd->device_identifier[j++] = | |
1277 | hex_str[(page_83[i] & 0xf0) >> 4]; | |
1278 | vpd->device_identifier[j++] = | |
1279 | hex_str[page_83[i] & 0x0f]; | |
1280 | i++; | |
1281 | } | |
1282 | break; | |
1283 | case 0x02: /* ASCII */ | |
1284 | case 0x03: /* UTF-8 */ | |
1285 | while (i < (4 + page_83[3])) | |
1286 | vpd->device_identifier[j++] = page_83[i++]; | |
1287 | break; | |
1288 | default: | |
1289 | break; | |
1290 | } | |
1291 | ||
1292 | return transport_dump_vpd_ident(vpd, NULL, 0); | |
1293 | } | |
1294 | EXPORT_SYMBOL(transport_set_vpd_ident); | |
1295 | ||
1296 | static void core_setup_task_attr_emulation(struct se_device *dev) | |
1297 | { | |
1298 | /* | |
1299 | * If this device is from Target_Core_Mod/pSCSI, disable the | |
1300 | * SAM Task Attribute emulation. | |
1301 | * | |
1302 | * This is currently not available in upsream Linux/SCSI Target | |
1303 | * mode code, and is assumed to be disabled while using TCM/pSCSI. | |
1304 | */ | |
e3d6f909 | 1305 | if (dev->transport->transport_type == TRANSPORT_PLUGIN_PHBA_PDEV) { |
c66ac9db NB |
1306 | dev->dev_task_attr_type = SAM_TASK_ATTR_PASSTHROUGH; |
1307 | return; | |
1308 | } | |
1309 | ||
1310 | dev->dev_task_attr_type = SAM_TASK_ATTR_EMULATED; | |
6708bb27 | 1311 | pr_debug("%s: Using SAM_TASK_ATTR_EMULATED for SPC: 0x%02x" |
e3d6f909 AG |
1312 | " device\n", dev->transport->name, |
1313 | dev->transport->get_device_rev(dev)); | |
c66ac9db NB |
1314 | } |
1315 | ||
1316 | static void scsi_dump_inquiry(struct se_device *dev) | |
1317 | { | |
e3d6f909 | 1318 | struct t10_wwn *wwn = &dev->se_sub_dev->t10_wwn; |
c66ac9db NB |
1319 | int i, device_type; |
1320 | /* | |
1321 | * Print Linux/SCSI style INQUIRY formatting to the kernel ring buffer | |
1322 | */ | |
6708bb27 | 1323 | pr_debug(" Vendor: "); |
c66ac9db NB |
1324 | for (i = 0; i < 8; i++) |
1325 | if (wwn->vendor[i] >= 0x20) | |
6708bb27 | 1326 | pr_debug("%c", wwn->vendor[i]); |
c66ac9db | 1327 | else |
6708bb27 | 1328 | pr_debug(" "); |
c66ac9db | 1329 | |
6708bb27 | 1330 | pr_debug(" Model: "); |
c66ac9db NB |
1331 | for (i = 0; i < 16; i++) |
1332 | if (wwn->model[i] >= 0x20) | |
6708bb27 | 1333 | pr_debug("%c", wwn->model[i]); |
c66ac9db | 1334 | else |
6708bb27 | 1335 | pr_debug(" "); |
c66ac9db | 1336 | |
6708bb27 | 1337 | pr_debug(" Revision: "); |
c66ac9db NB |
1338 | for (i = 0; i < 4; i++) |
1339 | if (wwn->revision[i] >= 0x20) | |
6708bb27 | 1340 | pr_debug("%c", wwn->revision[i]); |
c66ac9db | 1341 | else |
6708bb27 | 1342 | pr_debug(" "); |
c66ac9db | 1343 | |
6708bb27 | 1344 | pr_debug("\n"); |
c66ac9db | 1345 | |
e3d6f909 | 1346 | device_type = dev->transport->get_device_type(dev); |
6708bb27 AG |
1347 | pr_debug(" Type: %s ", scsi_device_type(device_type)); |
1348 | pr_debug(" ANSI SCSI revision: %02x\n", | |
e3d6f909 | 1349 | dev->transport->get_device_rev(dev)); |
c66ac9db NB |
1350 | } |
1351 | ||
1352 | struct se_device *transport_add_device_to_core_hba( | |
1353 | struct se_hba *hba, | |
1354 | struct se_subsystem_api *transport, | |
1355 | struct se_subsystem_dev *se_dev, | |
1356 | u32 device_flags, | |
1357 | void *transport_dev, | |
1358 | struct se_dev_limits *dev_limits, | |
1359 | const char *inquiry_prod, | |
1360 | const char *inquiry_rev) | |
1361 | { | |
12a18bdc | 1362 | int force_pt; |
c66ac9db NB |
1363 | struct se_device *dev; |
1364 | ||
1365 | dev = kzalloc(sizeof(struct se_device), GFP_KERNEL); | |
6708bb27 AG |
1366 | if (!dev) { |
1367 | pr_err("Unable to allocate memory for se_dev_t\n"); | |
c66ac9db NB |
1368 | return NULL; |
1369 | } | |
c66ac9db | 1370 | |
e3d6f909 | 1371 | transport_init_queue_obj(&dev->dev_queue_obj); |
c66ac9db NB |
1372 | dev->dev_flags = device_flags; |
1373 | dev->dev_status |= TRANSPORT_DEVICE_DEACTIVATED; | |
5951146d | 1374 | dev->dev_ptr = transport_dev; |
c66ac9db NB |
1375 | dev->se_hba = hba; |
1376 | dev->se_sub_dev = se_dev; | |
1377 | dev->transport = transport; | |
1378 | atomic_set(&dev->active_cmds, 0); | |
1379 | INIT_LIST_HEAD(&dev->dev_list); | |
1380 | INIT_LIST_HEAD(&dev->dev_sep_list); | |
1381 | INIT_LIST_HEAD(&dev->dev_tmr_list); | |
1382 | INIT_LIST_HEAD(&dev->execute_task_list); | |
1383 | INIT_LIST_HEAD(&dev->delayed_cmd_list); | |
1384 | INIT_LIST_HEAD(&dev->ordered_cmd_list); | |
1385 | INIT_LIST_HEAD(&dev->state_task_list); | |
07bde79a | 1386 | INIT_LIST_HEAD(&dev->qf_cmd_list); |
c66ac9db NB |
1387 | spin_lock_init(&dev->execute_task_lock); |
1388 | spin_lock_init(&dev->delayed_cmd_lock); | |
1389 | spin_lock_init(&dev->ordered_cmd_lock); | |
1390 | spin_lock_init(&dev->state_task_lock); | |
1391 | spin_lock_init(&dev->dev_alua_lock); | |
1392 | spin_lock_init(&dev->dev_reservation_lock); | |
1393 | spin_lock_init(&dev->dev_status_lock); | |
1394 | spin_lock_init(&dev->dev_status_thr_lock); | |
1395 | spin_lock_init(&dev->se_port_lock); | |
1396 | spin_lock_init(&dev->se_tmr_lock); | |
07bde79a | 1397 | spin_lock_init(&dev->qf_cmd_lock); |
c66ac9db NB |
1398 | |
1399 | dev->queue_depth = dev_limits->queue_depth; | |
1400 | atomic_set(&dev->depth_left, dev->queue_depth); | |
1401 | atomic_set(&dev->dev_ordered_id, 0); | |
1402 | ||
1403 | se_dev_set_default_attribs(dev, dev_limits); | |
1404 | ||
1405 | dev->dev_index = scsi_get_new_index(SCSI_DEVICE_INDEX); | |
1406 | dev->creation_time = get_jiffies_64(); | |
1407 | spin_lock_init(&dev->stats_lock); | |
1408 | ||
1409 | spin_lock(&hba->device_lock); | |
1410 | list_add_tail(&dev->dev_list, &hba->hba_dev_list); | |
1411 | hba->dev_count++; | |
1412 | spin_unlock(&hba->device_lock); | |
1413 | /* | |
1414 | * Setup the SAM Task Attribute emulation for struct se_device | |
1415 | */ | |
1416 | core_setup_task_attr_emulation(dev); | |
1417 | /* | |
1418 | * Force PR and ALUA passthrough emulation with internal object use. | |
1419 | */ | |
1420 | force_pt = (hba->hba_flags & HBA_FLAGS_INTERNAL_USE); | |
1421 | /* | |
1422 | * Setup the Reservations infrastructure for struct se_device | |
1423 | */ | |
1424 | core_setup_reservations(dev, force_pt); | |
1425 | /* | |
1426 | * Setup the Asymmetric Logical Unit Assignment for struct se_device | |
1427 | */ | |
1428 | if (core_setup_alua(dev, force_pt) < 0) | |
1429 | goto out; | |
1430 | ||
1431 | /* | |
1432 | * Startup the struct se_device processing thread | |
1433 | */ | |
1434 | dev->process_thread = kthread_run(transport_processing_thread, dev, | |
e3d6f909 | 1435 | "LIO_%s", dev->transport->name); |
c66ac9db | 1436 | if (IS_ERR(dev->process_thread)) { |
6708bb27 | 1437 | pr_err("Unable to create kthread: LIO_%s\n", |
e3d6f909 | 1438 | dev->transport->name); |
c66ac9db NB |
1439 | goto out; |
1440 | } | |
07bde79a NB |
1441 | /* |
1442 | * Setup work_queue for QUEUE_FULL | |
1443 | */ | |
1444 | INIT_WORK(&dev->qf_work_queue, target_qf_do_work); | |
c66ac9db NB |
1445 | /* |
1446 | * Preload the initial INQUIRY const values if we are doing | |
1447 | * anything virtual (IBLOCK, FILEIO, RAMDISK), but not for TCM/pSCSI | |
1448 | * passthrough because this is being provided by the backend LLD. | |
1449 | * This is required so that transport_get_inquiry() copies these | |
1450 | * originals once back into DEV_T10_WWN(dev) for the virtual device | |
1451 | * setup. | |
1452 | */ | |
e3d6f909 | 1453 | if (dev->transport->transport_type != TRANSPORT_PLUGIN_PHBA_PDEV) { |
f22c1196 | 1454 | if (!inquiry_prod || !inquiry_rev) { |
6708bb27 | 1455 | pr_err("All non TCM/pSCSI plugins require" |
c66ac9db NB |
1456 | " INQUIRY consts\n"); |
1457 | goto out; | |
1458 | } | |
1459 | ||
e3d6f909 AG |
1460 | strncpy(&dev->se_sub_dev->t10_wwn.vendor[0], "LIO-ORG", 8); |
1461 | strncpy(&dev->se_sub_dev->t10_wwn.model[0], inquiry_prod, 16); | |
1462 | strncpy(&dev->se_sub_dev->t10_wwn.revision[0], inquiry_rev, 4); | |
c66ac9db NB |
1463 | } |
1464 | scsi_dump_inquiry(dev); | |
1465 | ||
12a18bdc | 1466 | return dev; |
c66ac9db | 1467 | out: |
c66ac9db NB |
1468 | kthread_stop(dev->process_thread); |
1469 | ||
1470 | spin_lock(&hba->device_lock); | |
1471 | list_del(&dev->dev_list); | |
1472 | hba->dev_count--; | |
1473 | spin_unlock(&hba->device_lock); | |
1474 | ||
1475 | se_release_vpd_for_dev(dev); | |
1476 | ||
c66ac9db NB |
1477 | kfree(dev); |
1478 | ||
1479 | return NULL; | |
1480 | } | |
1481 | EXPORT_SYMBOL(transport_add_device_to_core_hba); | |
1482 | ||
1483 | /* transport_generic_prepare_cdb(): | |
1484 | * | |
1485 | * Since the Initiator sees iSCSI devices as LUNs, the SCSI CDB will | |
1486 | * contain the iSCSI LUN in bits 7-5 of byte 1 as per SAM-2. | |
1487 | * The point of this is since we are mapping iSCSI LUNs to | |
1488 | * SCSI Target IDs having a non-zero LUN in the CDB will throw the | |
1489 | * devices and HBAs for a loop. | |
1490 | */ | |
1491 | static inline void transport_generic_prepare_cdb( | |
1492 | unsigned char *cdb) | |
1493 | { | |
1494 | switch (cdb[0]) { | |
1495 | case READ_10: /* SBC - RDProtect */ | |
1496 | case READ_12: /* SBC - RDProtect */ | |
1497 | case READ_16: /* SBC - RDProtect */ | |
1498 | case SEND_DIAGNOSTIC: /* SPC - SELF-TEST Code */ | |
1499 | case VERIFY: /* SBC - VRProtect */ | |
1500 | case VERIFY_16: /* SBC - VRProtect */ | |
1501 | case WRITE_VERIFY: /* SBC - VRProtect */ | |
1502 | case WRITE_VERIFY_12: /* SBC - VRProtect */ | |
1503 | break; | |
1504 | default: | |
1505 | cdb[1] &= 0x1f; /* clear logical unit number */ | |
1506 | break; | |
1507 | } | |
1508 | } | |
1509 | ||
1510 | static struct se_task * | |
1511 | transport_generic_get_task(struct se_cmd *cmd, | |
1512 | enum dma_data_direction data_direction) | |
1513 | { | |
1514 | struct se_task *task; | |
5951146d | 1515 | struct se_device *dev = cmd->se_dev; |
c66ac9db | 1516 | |
6708bb27 | 1517 | task = dev->transport->alloc_task(cmd->t_task_cdb); |
c66ac9db | 1518 | if (!task) { |
6708bb27 | 1519 | pr_err("Unable to allocate struct se_task\n"); |
c66ac9db NB |
1520 | return NULL; |
1521 | } | |
1522 | ||
1523 | INIT_LIST_HEAD(&task->t_list); | |
1524 | INIT_LIST_HEAD(&task->t_execute_list); | |
1525 | INIT_LIST_HEAD(&task->t_state_list); | |
cc5d0f0f | 1526 | init_timer(&task->task_timer); |
c66ac9db | 1527 | init_completion(&task->task_stop_comp); |
c66ac9db | 1528 | task->task_se_cmd = cmd; |
c66ac9db NB |
1529 | task->task_data_direction = data_direction; |
1530 | ||
c66ac9db NB |
1531 | return task; |
1532 | } | |
1533 | ||
1534 | static int transport_generic_cmd_sequencer(struct se_cmd *, unsigned char *); | |
1535 | ||
c66ac9db NB |
1536 | /* |
1537 | * Used by fabric modules containing a local struct se_cmd within their | |
1538 | * fabric dependent per I/O descriptor. | |
1539 | */ | |
1540 | void transport_init_se_cmd( | |
1541 | struct se_cmd *cmd, | |
1542 | struct target_core_fabric_ops *tfo, | |
1543 | struct se_session *se_sess, | |
1544 | u32 data_length, | |
1545 | int data_direction, | |
1546 | int task_attr, | |
1547 | unsigned char *sense_buffer) | |
1548 | { | |
5951146d AG |
1549 | INIT_LIST_HEAD(&cmd->se_lun_node); |
1550 | INIT_LIST_HEAD(&cmd->se_delayed_node); | |
1551 | INIT_LIST_HEAD(&cmd->se_ordered_node); | |
07bde79a | 1552 | INIT_LIST_HEAD(&cmd->se_qf_node); |
79a7fef2 | 1553 | INIT_LIST_HEAD(&cmd->se_queue_node); |
c66ac9db | 1554 | |
a1d8b49a AG |
1555 | INIT_LIST_HEAD(&cmd->t_task_list); |
1556 | init_completion(&cmd->transport_lun_fe_stop_comp); | |
1557 | init_completion(&cmd->transport_lun_stop_comp); | |
1558 | init_completion(&cmd->t_transport_stop_comp); | |
1559 | spin_lock_init(&cmd->t_state_lock); | |
1560 | atomic_set(&cmd->transport_dev_active, 1); | |
c66ac9db NB |
1561 | |
1562 | cmd->se_tfo = tfo; | |
1563 | cmd->se_sess = se_sess; | |
1564 | cmd->data_length = data_length; | |
1565 | cmd->data_direction = data_direction; | |
1566 | cmd->sam_task_attr = task_attr; | |
1567 | cmd->sense_buffer = sense_buffer; | |
1568 | } | |
1569 | EXPORT_SYMBOL(transport_init_se_cmd); | |
1570 | ||
1571 | static int transport_check_alloc_task_attr(struct se_cmd *cmd) | |
1572 | { | |
1573 | /* | |
1574 | * Check if SAM Task Attribute emulation is enabled for this | |
1575 | * struct se_device storage object | |
1576 | */ | |
5951146d | 1577 | if (cmd->se_dev->dev_task_attr_type != SAM_TASK_ATTR_EMULATED) |
c66ac9db NB |
1578 | return 0; |
1579 | ||
e66ecd50 | 1580 | if (cmd->sam_task_attr == MSG_ACA_TAG) { |
6708bb27 | 1581 | pr_debug("SAM Task Attribute ACA" |
c66ac9db | 1582 | " emulation is not supported\n"); |
e3d6f909 | 1583 | return -EINVAL; |
c66ac9db NB |
1584 | } |
1585 | /* | |
1586 | * Used to determine when ORDERED commands should go from | |
1587 | * Dormant to Active status. | |
1588 | */ | |
5951146d | 1589 | cmd->se_ordered_id = atomic_inc_return(&cmd->se_dev->dev_ordered_id); |
c66ac9db | 1590 | smp_mb__after_atomic_inc(); |
6708bb27 | 1591 | pr_debug("Allocated se_ordered_id: %u for Task Attr: 0x%02x on %s\n", |
c66ac9db | 1592 | cmd->se_ordered_id, cmd->sam_task_attr, |
6708bb27 | 1593 | cmd->se_dev->transport->name); |
c66ac9db NB |
1594 | return 0; |
1595 | } | |
1596 | ||
c66ac9db NB |
1597 | /* transport_generic_allocate_tasks(): |
1598 | * | |
1599 | * Called from fabric RX Thread. | |
1600 | */ | |
1601 | int transport_generic_allocate_tasks( | |
1602 | struct se_cmd *cmd, | |
1603 | unsigned char *cdb) | |
1604 | { | |
1605 | int ret; | |
1606 | ||
1607 | transport_generic_prepare_cdb(cdb); | |
c66ac9db NB |
1608 | /* |
1609 | * Ensure that the received CDB is less than the max (252 + 8) bytes | |
1610 | * for VARIABLE_LENGTH_CMD | |
1611 | */ | |
1612 | if (scsi_command_size(cdb) > SCSI_MAX_VARLEN_CDB_SIZE) { | |
6708bb27 | 1613 | pr_err("Received SCSI CDB with command_size: %d that" |
c66ac9db NB |
1614 | " exceeds SCSI_MAX_VARLEN_CDB_SIZE: %d\n", |
1615 | scsi_command_size(cdb), SCSI_MAX_VARLEN_CDB_SIZE); | |
e3d6f909 | 1616 | return -EINVAL; |
c66ac9db NB |
1617 | } |
1618 | /* | |
1619 | * If the received CDB is larger than TCM_MAX_COMMAND_SIZE, | |
1620 | * allocate the additional extended CDB buffer now.. Otherwise | |
1621 | * setup the pointer from __t_task_cdb to t_task_cdb. | |
1622 | */ | |
a1d8b49a AG |
1623 | if (scsi_command_size(cdb) > sizeof(cmd->__t_task_cdb)) { |
1624 | cmd->t_task_cdb = kzalloc(scsi_command_size(cdb), | |
c66ac9db | 1625 | GFP_KERNEL); |
6708bb27 AG |
1626 | if (!cmd->t_task_cdb) { |
1627 | pr_err("Unable to allocate cmd->t_task_cdb" | |
a1d8b49a | 1628 | " %u > sizeof(cmd->__t_task_cdb): %lu ops\n", |
c66ac9db | 1629 | scsi_command_size(cdb), |
a1d8b49a | 1630 | (unsigned long)sizeof(cmd->__t_task_cdb)); |
e3d6f909 | 1631 | return -ENOMEM; |
c66ac9db NB |
1632 | } |
1633 | } else | |
a1d8b49a | 1634 | cmd->t_task_cdb = &cmd->__t_task_cdb[0]; |
c66ac9db | 1635 | /* |
a1d8b49a | 1636 | * Copy the original CDB into cmd-> |
c66ac9db | 1637 | */ |
a1d8b49a | 1638 | memcpy(cmd->t_task_cdb, cdb, scsi_command_size(cdb)); |
c66ac9db NB |
1639 | /* |
1640 | * Setup the received CDB based on SCSI defined opcodes and | |
1641 | * perform unit attention, persistent reservations and ALUA | |
a1d8b49a | 1642 | * checks for virtual device backends. The cmd->t_task_cdb |
c66ac9db NB |
1643 | * pointer is expected to be setup before we reach this point. |
1644 | */ | |
1645 | ret = transport_generic_cmd_sequencer(cmd, cdb); | |
1646 | if (ret < 0) | |
1647 | return ret; | |
1648 | /* | |
1649 | * Check for SAM Task Attribute Emulation | |
1650 | */ | |
1651 | if (transport_check_alloc_task_attr(cmd) < 0) { | |
1652 | cmd->se_cmd_flags |= SCF_SCSI_CDB_EXCEPTION; | |
1653 | cmd->scsi_sense_reason = TCM_INVALID_CDB_FIELD; | |
5951146d | 1654 | return -EINVAL; |
c66ac9db NB |
1655 | } |
1656 | spin_lock(&cmd->se_lun->lun_sep_lock); | |
1657 | if (cmd->se_lun->lun_sep) | |
1658 | cmd->se_lun->lun_sep->sep_stats.cmd_pdus++; | |
1659 | spin_unlock(&cmd->se_lun->lun_sep_lock); | |
1660 | return 0; | |
1661 | } | |
1662 | EXPORT_SYMBOL(transport_generic_allocate_tasks); | |
1663 | ||
695434e1 NB |
1664 | /* |
1665 | * Used by fabric module frontends to queue tasks directly. | |
1666 | * Many only be used from process context only | |
1667 | */ | |
1668 | int transport_handle_cdb_direct( | |
1669 | struct se_cmd *cmd) | |
1670 | { | |
dd8ae59d NB |
1671 | int ret; |
1672 | ||
695434e1 NB |
1673 | if (!cmd->se_lun) { |
1674 | dump_stack(); | |
6708bb27 | 1675 | pr_err("cmd->se_lun is NULL\n"); |
695434e1 NB |
1676 | return -EINVAL; |
1677 | } | |
1678 | if (in_interrupt()) { | |
1679 | dump_stack(); | |
6708bb27 | 1680 | pr_err("transport_generic_handle_cdb cannot be called" |
695434e1 NB |
1681 | " from interrupt context\n"); |
1682 | return -EINVAL; | |
1683 | } | |
dd8ae59d NB |
1684 | /* |
1685 | * Set TRANSPORT_NEW_CMD state and cmd->t_transport_active=1 following | |
1686 | * transport_generic_handle_cdb*() -> transport_add_cmd_to_queue() | |
1687 | * in existing usage to ensure that outstanding descriptors are handled | |
d14921d6 | 1688 | * correctly during shutdown via transport_wait_for_tasks() |
dd8ae59d NB |
1689 | * |
1690 | * Also, we don't take cmd->t_state_lock here as we only expect | |
1691 | * this to be called for initial descriptor submission. | |
1692 | */ | |
1693 | cmd->t_state = TRANSPORT_NEW_CMD; | |
1694 | atomic_set(&cmd->t_transport_active, 1); | |
1695 | /* | |
1696 | * transport_generic_new_cmd() is already handling QUEUE_FULL, | |
1697 | * so follow TRANSPORT_NEW_CMD processing thread context usage | |
1698 | * and call transport_generic_request_failure() if necessary.. | |
1699 | */ | |
1700 | ret = transport_generic_new_cmd(cmd); | |
1701 | if (ret == -EAGAIN) | |
1702 | return 0; | |
1703 | else if (ret < 0) { | |
1704 | cmd->transport_error_status = ret; | |
4499dda8 | 1705 | transport_generic_request_failure(cmd, 0, |
dd8ae59d NB |
1706 | (cmd->data_direction != DMA_TO_DEVICE)); |
1707 | } | |
1708 | return 0; | |
695434e1 NB |
1709 | } |
1710 | EXPORT_SYMBOL(transport_handle_cdb_direct); | |
1711 | ||
c66ac9db NB |
1712 | /* |
1713 | * Used by fabric module frontends defining a TFO->new_cmd_map() caller | |
1714 | * to queue up a newly setup se_cmd w/ TRANSPORT_NEW_CMD_MAP in order to | |
1715 | * complete setup in TCM process context w/ TFO->new_cmd_map(). | |
1716 | */ | |
1717 | int transport_generic_handle_cdb_map( | |
1718 | struct se_cmd *cmd) | |
1719 | { | |
e3d6f909 | 1720 | if (!cmd->se_lun) { |
c66ac9db | 1721 | dump_stack(); |
6708bb27 | 1722 | pr_err("cmd->se_lun is NULL\n"); |
e3d6f909 | 1723 | return -EINVAL; |
c66ac9db NB |
1724 | } |
1725 | ||
f7a5cc0b | 1726 | transport_add_cmd_to_queue(cmd, TRANSPORT_NEW_CMD_MAP, false); |
c66ac9db NB |
1727 | return 0; |
1728 | } | |
1729 | EXPORT_SYMBOL(transport_generic_handle_cdb_map); | |
1730 | ||
1731 | /* transport_generic_handle_data(): | |
1732 | * | |
1733 | * | |
1734 | */ | |
1735 | int transport_generic_handle_data( | |
1736 | struct se_cmd *cmd) | |
1737 | { | |
1738 | /* | |
1739 | * For the software fabric case, then we assume the nexus is being | |
1740 | * failed/shutdown when signals are pending from the kthread context | |
1741 | * caller, so we return a failure. For the HW target mode case running | |
1742 | * in interrupt code, the signal_pending() check is skipped. | |
1743 | */ | |
1744 | if (!in_interrupt() && signal_pending(current)) | |
e3d6f909 | 1745 | return -EPERM; |
c66ac9db NB |
1746 | /* |
1747 | * If the received CDB has aleady been ABORTED by the generic | |
1748 | * target engine, we now call transport_check_aborted_status() | |
1749 | * to queue any delated TASK_ABORTED status for the received CDB to the | |
25985edc | 1750 | * fabric module as we are expecting no further incoming DATA OUT |
c66ac9db NB |
1751 | * sequences at this point. |
1752 | */ | |
1753 | if (transport_check_aborted_status(cmd, 1) != 0) | |
1754 | return 0; | |
1755 | ||
f7a5cc0b | 1756 | transport_add_cmd_to_queue(cmd, TRANSPORT_PROCESS_WRITE, false); |
c66ac9db NB |
1757 | return 0; |
1758 | } | |
1759 | EXPORT_SYMBOL(transport_generic_handle_data); | |
1760 | ||
1761 | /* transport_generic_handle_tmr(): | |
1762 | * | |
1763 | * | |
1764 | */ | |
1765 | int transport_generic_handle_tmr( | |
1766 | struct se_cmd *cmd) | |
1767 | { | |
f7a5cc0b | 1768 | transport_add_cmd_to_queue(cmd, TRANSPORT_PROCESS_TMR, false); |
c66ac9db NB |
1769 | return 0; |
1770 | } | |
1771 | EXPORT_SYMBOL(transport_generic_handle_tmr); | |
1772 | ||
f4366772 NB |
1773 | void transport_generic_free_cmd_intr( |
1774 | struct se_cmd *cmd) | |
1775 | { | |
f7a5cc0b | 1776 | transport_add_cmd_to_queue(cmd, TRANSPORT_FREE_CMD_INTR, false); |
f4366772 NB |
1777 | } |
1778 | EXPORT_SYMBOL(transport_generic_free_cmd_intr); | |
1779 | ||
cdbb70bb CH |
1780 | /* |
1781 | * If the task is active, request it to be stopped and sleep until it | |
1782 | * has completed. | |
1783 | */ | |
1784 | bool target_stop_task(struct se_task *task, unsigned long *flags) | |
1785 | { | |
1786 | struct se_cmd *cmd = task->task_se_cmd; | |
1787 | bool was_active = false; | |
1788 | ||
1789 | if (task->task_flags & TF_ACTIVE) { | |
1790 | task->task_flags |= TF_REQUEST_STOP; | |
1791 | spin_unlock_irqrestore(&cmd->t_state_lock, *flags); | |
1792 | ||
1793 | pr_debug("Task %p waiting to complete\n", task); | |
cc5d0f0f | 1794 | del_timer_sync(&task->task_timer); |
cdbb70bb CH |
1795 | wait_for_completion(&task->task_stop_comp); |
1796 | pr_debug("Task %p stopped successfully\n", task); | |
1797 | ||
1798 | spin_lock_irqsave(&cmd->t_state_lock, *flags); | |
1799 | atomic_dec(&cmd->t_task_cdbs_left); | |
1800 | task->task_flags &= ~(TF_ACTIVE | TF_REQUEST_STOP); | |
1801 | was_active = true; | |
1802 | } | |
1803 | ||
cdbb70bb CH |
1804 | return was_active; |
1805 | } | |
1806 | ||
c66ac9db NB |
1807 | static int transport_stop_tasks_for_cmd(struct se_cmd *cmd) |
1808 | { | |
1809 | struct se_task *task, *task_tmp; | |
1810 | unsigned long flags; | |
1811 | int ret = 0; | |
1812 | ||
6708bb27 | 1813 | pr_debug("ITT[0x%08x] - Stopping tasks\n", |
e3d6f909 | 1814 | cmd->se_tfo->get_task_tag(cmd)); |
c66ac9db NB |
1815 | |
1816 | /* | |
1817 | * No tasks remain in the execution queue | |
1818 | */ | |
a1d8b49a | 1819 | spin_lock_irqsave(&cmd->t_state_lock, flags); |
c66ac9db | 1820 | list_for_each_entry_safe(task, task_tmp, |
a1d8b49a | 1821 | &cmd->t_task_list, t_list) { |
04629b7b | 1822 | pr_debug("Processing task %p\n", task); |
c66ac9db NB |
1823 | /* |
1824 | * If the struct se_task has not been sent and is not active, | |
1825 | * remove the struct se_task from the execution queue. | |
1826 | */ | |
6c76bf95 | 1827 | if (!(task->task_flags & (TF_ACTIVE | TF_SENT))) { |
a1d8b49a | 1828 | spin_unlock_irqrestore(&cmd->t_state_lock, |
c66ac9db NB |
1829 | flags); |
1830 | transport_remove_task_from_execute_queue(task, | |
42bf829e | 1831 | cmd->se_dev); |
c66ac9db | 1832 | |
04629b7b | 1833 | pr_debug("Task %p removed from execute queue\n", task); |
a1d8b49a | 1834 | spin_lock_irqsave(&cmd->t_state_lock, flags); |
c66ac9db NB |
1835 | continue; |
1836 | } | |
1837 | ||
cdbb70bb | 1838 | if (!target_stop_task(task, &flags)) { |
04629b7b | 1839 | pr_debug("Task %p - did nothing\n", task); |
c66ac9db NB |
1840 | ret++; |
1841 | } | |
c66ac9db | 1842 | } |
a1d8b49a | 1843 | spin_unlock_irqrestore(&cmd->t_state_lock, flags); |
c66ac9db NB |
1844 | |
1845 | return ret; | |
1846 | } | |
1847 | ||
c66ac9db NB |
1848 | /* |
1849 | * Handle SAM-esque emulation for generic transport request failures. | |
1850 | */ | |
1851 | static void transport_generic_request_failure( | |
1852 | struct se_cmd *cmd, | |
c66ac9db NB |
1853 | int complete, |
1854 | int sc) | |
1855 | { | |
07bde79a NB |
1856 | int ret = 0; |
1857 | ||
6708bb27 | 1858 | pr_debug("-----[ Storage Engine Exception for cmd: %p ITT: 0x%08x" |
e3d6f909 | 1859 | " CDB: 0x%02x\n", cmd, cmd->se_tfo->get_task_tag(cmd), |
a1d8b49a | 1860 | cmd->t_task_cdb[0]); |
f2da9dbd | 1861 | pr_debug("-----[ i_state: %d t_state: %d transport_error_status: %d\n", |
e3d6f909 | 1862 | cmd->se_tfo->get_cmd_state(cmd), |
f2da9dbd | 1863 | cmd->t_state, |
c66ac9db | 1864 | cmd->transport_error_status); |
6708bb27 | 1865 | pr_debug("-----[ t_tasks: %d t_task_cdbs_left: %d" |
c66ac9db NB |
1866 | " t_task_cdbs_sent: %d t_task_cdbs_ex_left: %d --" |
1867 | " t_transport_active: %d t_transport_stop: %d" | |
6708bb27 | 1868 | " t_transport_sent: %d\n", cmd->t_task_list_num, |
a1d8b49a AG |
1869 | atomic_read(&cmd->t_task_cdbs_left), |
1870 | atomic_read(&cmd->t_task_cdbs_sent), | |
1871 | atomic_read(&cmd->t_task_cdbs_ex_left), | |
1872 | atomic_read(&cmd->t_transport_active), | |
1873 | atomic_read(&cmd->t_transport_stop), | |
1874 | atomic_read(&cmd->t_transport_sent)); | |
c66ac9db | 1875 | |
c66ac9db NB |
1876 | /* |
1877 | * For SAM Task Attribute emulation for failed struct se_cmd | |
1878 | */ | |
1879 | if (cmd->se_dev->dev_task_attr_type == SAM_TASK_ATTR_EMULATED) | |
1880 | transport_complete_task_attr(cmd); | |
1881 | ||
1882 | if (complete) { | |
1883 | transport_direct_request_timeout(cmd); | |
1884 | cmd->transport_error_status = PYX_TRANSPORT_LU_COMM_FAILURE; | |
1885 | } | |
1886 | ||
1887 | switch (cmd->transport_error_status) { | |
1888 | case PYX_TRANSPORT_UNKNOWN_SAM_OPCODE: | |
1889 | cmd->scsi_sense_reason = TCM_UNSUPPORTED_SCSI_OPCODE; | |
1890 | break; | |
1891 | case PYX_TRANSPORT_REQ_TOO_MANY_SECTORS: | |
1892 | cmd->scsi_sense_reason = TCM_SECTOR_COUNT_TOO_MANY; | |
1893 | break; | |
1894 | case PYX_TRANSPORT_INVALID_CDB_FIELD: | |
1895 | cmd->scsi_sense_reason = TCM_INVALID_CDB_FIELD; | |
1896 | break; | |
1897 | case PYX_TRANSPORT_INVALID_PARAMETER_LIST: | |
1898 | cmd->scsi_sense_reason = TCM_INVALID_PARAMETER_LIST; | |
1899 | break; | |
1900 | case PYX_TRANSPORT_OUT_OF_MEMORY_RESOURCES: | |
1901 | if (!sc) | |
1902 | transport_new_cmd_failure(cmd); | |
1903 | /* | |
1904 | * Currently for PYX_TRANSPORT_OUT_OF_MEMORY_RESOURCES, | |
1905 | * we force this session to fall back to session | |
1906 | * recovery. | |
1907 | */ | |
e3d6f909 AG |
1908 | cmd->se_tfo->fall_back_to_erl0(cmd->se_sess); |
1909 | cmd->se_tfo->stop_session(cmd->se_sess, 0, 0); | |
c66ac9db NB |
1910 | |
1911 | goto check_stop; | |
1912 | case PYX_TRANSPORT_LU_COMM_FAILURE: | |
1913 | case PYX_TRANSPORT_ILLEGAL_REQUEST: | |
1914 | cmd->scsi_sense_reason = TCM_LOGICAL_UNIT_COMMUNICATION_FAILURE; | |
1915 | break; | |
1916 | case PYX_TRANSPORT_UNKNOWN_MODE_PAGE: | |
1917 | cmd->scsi_sense_reason = TCM_UNKNOWN_MODE_PAGE; | |
1918 | break; | |
1919 | case PYX_TRANSPORT_WRITE_PROTECTED: | |
1920 | cmd->scsi_sense_reason = TCM_WRITE_PROTECTED; | |
1921 | break; | |
1922 | case PYX_TRANSPORT_RESERVATION_CONFLICT: | |
1923 | /* | |
1924 | * No SENSE Data payload for this case, set SCSI Status | |
1925 | * and queue the response to $FABRIC_MOD. | |
1926 | * | |
1927 | * Uses linux/include/scsi/scsi.h SAM status codes defs | |
1928 | */ | |
1929 | cmd->scsi_status = SAM_STAT_RESERVATION_CONFLICT; | |
1930 | /* | |
1931 | * For UA Interlock Code 11b, a RESERVATION CONFLICT will | |
1932 | * establish a UNIT ATTENTION with PREVIOUS RESERVATION | |
1933 | * CONFLICT STATUS. | |
1934 | * | |
1935 | * See spc4r17, section 7.4.6 Control Mode Page, Table 349 | |
1936 | */ | |
e3d6f909 AG |
1937 | if (cmd->se_sess && |
1938 | cmd->se_dev->se_sub_dev->se_dev_attrib.emulate_ua_intlck_ctrl == 2) | |
1939 | core_scsi3_ua_allocate(cmd->se_sess->se_node_acl, | |
c66ac9db NB |
1940 | cmd->orig_fe_lun, 0x2C, |
1941 | ASCQ_2CH_PREVIOUS_RESERVATION_CONFLICT_STATUS); | |
1942 | ||
07bde79a NB |
1943 | ret = cmd->se_tfo->queue_status(cmd); |
1944 | if (ret == -EAGAIN) | |
1945 | goto queue_full; | |
c66ac9db NB |
1946 | goto check_stop; |
1947 | case PYX_TRANSPORT_USE_SENSE_REASON: | |
1948 | /* | |
1949 | * struct se_cmd->scsi_sense_reason already set | |
1950 | */ | |
1951 | break; | |
1952 | default: | |
6708bb27 | 1953 | pr_err("Unknown transport error for CDB 0x%02x: %d\n", |
a1d8b49a | 1954 | cmd->t_task_cdb[0], |
c66ac9db NB |
1955 | cmd->transport_error_status); |
1956 | cmd->scsi_sense_reason = TCM_UNSUPPORTED_SCSI_OPCODE; | |
1957 | break; | |
1958 | } | |
16ab8e60 NB |
1959 | /* |
1960 | * If a fabric does not define a cmd->se_tfo->new_cmd_map caller, | |
1961 | * make the call to transport_send_check_condition_and_sense() | |
1962 | * directly. Otherwise expect the fabric to make the call to | |
1963 | * transport_send_check_condition_and_sense() after handling | |
1964 | * possible unsoliticied write data payloads. | |
1965 | */ | |
1966 | if (!sc && !cmd->se_tfo->new_cmd_map) | |
c66ac9db | 1967 | transport_new_cmd_failure(cmd); |
07bde79a NB |
1968 | else { |
1969 | ret = transport_send_check_condition_and_sense(cmd, | |
1970 | cmd->scsi_sense_reason, 0); | |
1971 | if (ret == -EAGAIN) | |
1972 | goto queue_full; | |
1973 | } | |
1974 | ||
c66ac9db NB |
1975 | check_stop: |
1976 | transport_lun_remove_cmd(cmd); | |
6708bb27 | 1977 | if (!transport_cmd_check_stop_to_fabric(cmd)) |
c66ac9db | 1978 | ; |
07bde79a NB |
1979 | return; |
1980 | ||
1981 | queue_full: | |
e057f533 CH |
1982 | cmd->t_state = TRANSPORT_COMPLETE_QF_OK; |
1983 | transport_handle_queue_full(cmd, cmd->se_dev); | |
c66ac9db NB |
1984 | } |
1985 | ||
1986 | static void transport_direct_request_timeout(struct se_cmd *cmd) | |
1987 | { | |
1988 | unsigned long flags; | |
1989 | ||
a1d8b49a | 1990 | spin_lock_irqsave(&cmd->t_state_lock, flags); |
6708bb27 | 1991 | if (!atomic_read(&cmd->t_transport_timeout)) { |
a1d8b49a | 1992 | spin_unlock_irqrestore(&cmd->t_state_lock, flags); |
c66ac9db NB |
1993 | return; |
1994 | } | |
a1d8b49a AG |
1995 | if (atomic_read(&cmd->t_task_cdbs_timeout_left)) { |
1996 | spin_unlock_irqrestore(&cmd->t_state_lock, flags); | |
c66ac9db NB |
1997 | return; |
1998 | } | |
1999 | ||
a1d8b49a AG |
2000 | atomic_sub(atomic_read(&cmd->t_transport_timeout), |
2001 | &cmd->t_se_count); | |
2002 | spin_unlock_irqrestore(&cmd->t_state_lock, flags); | |
c66ac9db NB |
2003 | } |
2004 | ||
c66ac9db NB |
2005 | static inline u32 transport_lba_21(unsigned char *cdb) |
2006 | { | |
2007 | return ((cdb[1] & 0x1f) << 16) | (cdb[2] << 8) | cdb[3]; | |
2008 | } | |
2009 | ||
2010 | static inline u32 transport_lba_32(unsigned char *cdb) | |
2011 | { | |
2012 | return (cdb[2] << 24) | (cdb[3] << 16) | (cdb[4] << 8) | cdb[5]; | |
2013 | } | |
2014 | ||
2015 | static inline unsigned long long transport_lba_64(unsigned char *cdb) | |
2016 | { | |
2017 | unsigned int __v1, __v2; | |
2018 | ||
2019 | __v1 = (cdb[2] << 24) | (cdb[3] << 16) | (cdb[4] << 8) | cdb[5]; | |
2020 | __v2 = (cdb[6] << 24) | (cdb[7] << 16) | (cdb[8] << 8) | cdb[9]; | |
2021 | ||
2022 | return ((unsigned long long)__v2) | (unsigned long long)__v1 << 32; | |
2023 | } | |
2024 | ||
2025 | /* | |
2026 | * For VARIABLE_LENGTH_CDB w/ 32 byte extended CDBs | |
2027 | */ | |
2028 | static inline unsigned long long transport_lba_64_ext(unsigned char *cdb) | |
2029 | { | |
2030 | unsigned int __v1, __v2; | |
2031 | ||
2032 | __v1 = (cdb[12] << 24) | (cdb[13] << 16) | (cdb[14] << 8) | cdb[15]; | |
2033 | __v2 = (cdb[16] << 24) | (cdb[17] << 16) | (cdb[18] << 8) | cdb[19]; | |
2034 | ||
2035 | return ((unsigned long long)__v2) | (unsigned long long)__v1 << 32; | |
2036 | } | |
2037 | ||
2038 | static void transport_set_supported_SAM_opcode(struct se_cmd *se_cmd) | |
2039 | { | |
2040 | unsigned long flags; | |
2041 | ||
a1d8b49a | 2042 | spin_lock_irqsave(&se_cmd->t_state_lock, flags); |
c66ac9db | 2043 | se_cmd->se_cmd_flags |= SCF_SUPPORTED_SAM_OPCODE; |
a1d8b49a | 2044 | spin_unlock_irqrestore(&se_cmd->t_state_lock, flags); |
c66ac9db NB |
2045 | } |
2046 | ||
2047 | /* | |
2048 | * Called from interrupt context. | |
2049 | */ | |
2050 | static void transport_task_timeout_handler(unsigned long data) | |
2051 | { | |
2052 | struct se_task *task = (struct se_task *)data; | |
e3d6f909 | 2053 | struct se_cmd *cmd = task->task_se_cmd; |
c66ac9db NB |
2054 | unsigned long flags; |
2055 | ||
6708bb27 | 2056 | pr_debug("transport task timeout fired! task: %p cmd: %p\n", task, cmd); |
c66ac9db | 2057 | |
a1d8b49a | 2058 | spin_lock_irqsave(&cmd->t_state_lock, flags); |
c66ac9db NB |
2059 | |
2060 | /* | |
2061 | * Determine if transport_complete_task() has already been called. | |
2062 | */ | |
6c76bf95 CH |
2063 | if (!(task->task_flags & TF_ACTIVE)) { |
2064 | pr_debug("transport task: %p cmd: %p timeout !TF_ACTIVE\n", | |
2065 | task, cmd); | |
a1d8b49a | 2066 | spin_unlock_irqrestore(&cmd->t_state_lock, flags); |
c66ac9db NB |
2067 | return; |
2068 | } | |
2069 | ||
a1d8b49a AG |
2070 | atomic_inc(&cmd->t_se_count); |
2071 | atomic_inc(&cmd->t_transport_timeout); | |
2072 | cmd->t_tasks_failed = 1; | |
c66ac9db | 2073 | |
6c76bf95 | 2074 | task->task_flags |= TF_TIMEOUT; |
c66ac9db NB |
2075 | task->task_error_status = PYX_TRANSPORT_TASK_TIMEOUT; |
2076 | task->task_scsi_status = 1; | |
2077 | ||
6c76bf95 CH |
2078 | if (task->task_flags & TF_REQUEST_STOP) { |
2079 | pr_debug("transport task: %p cmd: %p timeout TF_REQUEST_STOP" | |
c66ac9db | 2080 | " == 1\n", task, cmd); |
a1d8b49a | 2081 | spin_unlock_irqrestore(&cmd->t_state_lock, flags); |
c66ac9db NB |
2082 | complete(&task->task_stop_comp); |
2083 | return; | |
2084 | } | |
2085 | ||
6708bb27 AG |
2086 | if (!atomic_dec_and_test(&cmd->t_task_cdbs_left)) { |
2087 | pr_debug("transport task: %p cmd: %p timeout non zero" | |
c66ac9db | 2088 | " t_task_cdbs_left\n", task, cmd); |
a1d8b49a | 2089 | spin_unlock_irqrestore(&cmd->t_state_lock, flags); |
c66ac9db NB |
2090 | return; |
2091 | } | |
6708bb27 | 2092 | pr_debug("transport task: %p cmd: %p timeout ZERO t_task_cdbs_left\n", |
c66ac9db NB |
2093 | task, cmd); |
2094 | ||
35e0e757 CH |
2095 | INIT_WORK(&cmd->work, target_complete_failure_work); |
2096 | cmd->t_state = TRANSPORT_COMPLETE; | |
2097 | atomic_set(&cmd->t_transport_active, 1); | |
a1d8b49a | 2098 | spin_unlock_irqrestore(&cmd->t_state_lock, flags); |
c66ac9db | 2099 | |
35e0e757 | 2100 | queue_work(target_completion_wq, &cmd->work); |
c66ac9db NB |
2101 | } |
2102 | ||
c66ac9db NB |
2103 | static void transport_start_task_timer(struct se_task *task) |
2104 | { | |
42bf829e | 2105 | struct se_device *dev = task->task_se_cmd->se_dev; |
c66ac9db NB |
2106 | int timeout; |
2107 | ||
c66ac9db NB |
2108 | /* |
2109 | * If the task_timeout is disabled, exit now. | |
2110 | */ | |
e3d6f909 | 2111 | timeout = dev->se_sub_dev->se_dev_attrib.task_timeout; |
6708bb27 | 2112 | if (!timeout) |
c66ac9db NB |
2113 | return; |
2114 | ||
c66ac9db NB |
2115 | task->task_timer.expires = (get_jiffies_64() + timeout * HZ); |
2116 | task->task_timer.data = (unsigned long) task; | |
2117 | task->task_timer.function = transport_task_timeout_handler; | |
c66ac9db | 2118 | add_timer(&task->task_timer); |
c66ac9db NB |
2119 | } |
2120 | ||
2121 | static inline int transport_tcq_window_closed(struct se_device *dev) | |
2122 | { | |
2123 | if (dev->dev_tcq_window_closed++ < | |
2124 | PYX_TRANSPORT_WINDOW_CLOSED_THRESHOLD) { | |
2125 | msleep(PYX_TRANSPORT_WINDOW_CLOSED_WAIT_SHORT); | |
2126 | } else | |
2127 | msleep(PYX_TRANSPORT_WINDOW_CLOSED_WAIT_LONG); | |
2128 | ||
e3d6f909 | 2129 | wake_up_interruptible(&dev->dev_queue_obj.thread_wq); |
c66ac9db NB |
2130 | return 0; |
2131 | } | |
2132 | ||
2133 | /* | |
2134 | * Called from Fabric Module context from transport_execute_tasks() | |
2135 | * | |
2136 | * The return of this function determins if the tasks from struct se_cmd | |
2137 | * get added to the execution queue in transport_execute_tasks(), | |
2138 | * or are added to the delayed or ordered lists here. | |
2139 | */ | |
2140 | static inline int transport_execute_task_attr(struct se_cmd *cmd) | |
2141 | { | |
5951146d | 2142 | if (cmd->se_dev->dev_task_attr_type != SAM_TASK_ATTR_EMULATED) |
c66ac9db NB |
2143 | return 1; |
2144 | /* | |
25985edc | 2145 | * Check for the existence of HEAD_OF_QUEUE, and if true return 1 |
c66ac9db NB |
2146 | * to allow the passed struct se_cmd list of tasks to the front of the list. |
2147 | */ | |
e66ecd50 | 2148 | if (cmd->sam_task_attr == MSG_HEAD_TAG) { |
5951146d | 2149 | atomic_inc(&cmd->se_dev->dev_hoq_count); |
c66ac9db | 2150 | smp_mb__after_atomic_inc(); |
6708bb27 | 2151 | pr_debug("Added HEAD_OF_QUEUE for CDB:" |
c66ac9db | 2152 | " 0x%02x, se_ordered_id: %u\n", |
6708bb27 | 2153 | cmd->t_task_cdb[0], |
c66ac9db NB |
2154 | cmd->se_ordered_id); |
2155 | return 1; | |
e66ecd50 | 2156 | } else if (cmd->sam_task_attr == MSG_ORDERED_TAG) { |
5951146d AG |
2157 | spin_lock(&cmd->se_dev->ordered_cmd_lock); |
2158 | list_add_tail(&cmd->se_ordered_node, | |
2159 | &cmd->se_dev->ordered_cmd_list); | |
2160 | spin_unlock(&cmd->se_dev->ordered_cmd_lock); | |
c66ac9db | 2161 | |
5951146d | 2162 | atomic_inc(&cmd->se_dev->dev_ordered_sync); |
c66ac9db NB |
2163 | smp_mb__after_atomic_inc(); |
2164 | ||
6708bb27 | 2165 | pr_debug("Added ORDERED for CDB: 0x%02x to ordered" |
c66ac9db | 2166 | " list, se_ordered_id: %u\n", |
a1d8b49a | 2167 | cmd->t_task_cdb[0], |
c66ac9db NB |
2168 | cmd->se_ordered_id); |
2169 | /* | |
2170 | * Add ORDERED command to tail of execution queue if | |
2171 | * no other older commands exist that need to be | |
2172 | * completed first. | |
2173 | */ | |
6708bb27 | 2174 | if (!atomic_read(&cmd->se_dev->simple_cmds)) |
c66ac9db NB |
2175 | return 1; |
2176 | } else { | |
2177 | /* | |
2178 | * For SIMPLE and UNTAGGED Task Attribute commands | |
2179 | */ | |
5951146d | 2180 | atomic_inc(&cmd->se_dev->simple_cmds); |
c66ac9db NB |
2181 | smp_mb__after_atomic_inc(); |
2182 | } | |
2183 | /* | |
2184 | * Otherwise if one or more outstanding ORDERED task attribute exist, | |
2185 | * add the dormant task(s) built for the passed struct se_cmd to the | |
2186 | * execution queue and become in Active state for this struct se_device. | |
2187 | */ | |
5951146d | 2188 | if (atomic_read(&cmd->se_dev->dev_ordered_sync) != 0) { |
c66ac9db NB |
2189 | /* |
2190 | * Otherwise, add cmd w/ tasks to delayed cmd queue that | |
25985edc | 2191 | * will be drained upon completion of HEAD_OF_QUEUE task. |
c66ac9db | 2192 | */ |
5951146d | 2193 | spin_lock(&cmd->se_dev->delayed_cmd_lock); |
c66ac9db | 2194 | cmd->se_cmd_flags |= SCF_DELAYED_CMD_FROM_SAM_ATTR; |
5951146d AG |
2195 | list_add_tail(&cmd->se_delayed_node, |
2196 | &cmd->se_dev->delayed_cmd_list); | |
2197 | spin_unlock(&cmd->se_dev->delayed_cmd_lock); | |
c66ac9db | 2198 | |
6708bb27 | 2199 | pr_debug("Added CDB: 0x%02x Task Attr: 0x%02x to" |
c66ac9db | 2200 | " delayed CMD list, se_ordered_id: %u\n", |
a1d8b49a | 2201 | cmd->t_task_cdb[0], cmd->sam_task_attr, |
c66ac9db NB |
2202 | cmd->se_ordered_id); |
2203 | /* | |
2204 | * Return zero to let transport_execute_tasks() know | |
2205 | * not to add the delayed tasks to the execution list. | |
2206 | */ | |
2207 | return 0; | |
2208 | } | |
2209 | /* | |
2210 | * Otherwise, no ORDERED task attributes exist.. | |
2211 | */ | |
2212 | return 1; | |
2213 | } | |
2214 | ||
2215 | /* | |
2216 | * Called from fabric module context in transport_generic_new_cmd() and | |
2217 | * transport_generic_process_write() | |
2218 | */ | |
2219 | static int transport_execute_tasks(struct se_cmd *cmd) | |
2220 | { | |
2221 | int add_tasks; | |
2222 | ||
db1620a2 CH |
2223 | if (se_dev_check_online(cmd->se_orig_obj_ptr) != 0) { |
2224 | cmd->transport_error_status = PYX_TRANSPORT_LU_COMM_FAILURE; | |
4499dda8 | 2225 | transport_generic_request_failure(cmd, 0, 1); |
db1620a2 | 2226 | return 0; |
c66ac9db | 2227 | } |
db1620a2 | 2228 | |
c66ac9db NB |
2229 | /* |
2230 | * Call transport_cmd_check_stop() to see if a fabric exception | |
25985edc | 2231 | * has occurred that prevents execution. |
c66ac9db | 2232 | */ |
6708bb27 | 2233 | if (!transport_cmd_check_stop(cmd, 0, TRANSPORT_PROCESSING)) { |
c66ac9db NB |
2234 | /* |
2235 | * Check for SAM Task Attribute emulation and HEAD_OF_QUEUE | |
2236 | * attribute for the tasks of the received struct se_cmd CDB | |
2237 | */ | |
2238 | add_tasks = transport_execute_task_attr(cmd); | |
e3d6f909 | 2239 | if (!add_tasks) |
c66ac9db NB |
2240 | goto execute_tasks; |
2241 | /* | |
2242 | * This calls transport_add_tasks_from_cmd() to handle | |
2243 | * HEAD_OF_QUEUE ordering for SAM Task Attribute emulation | |
2244 | * (if enabled) in __transport_add_task_to_execute_queue() and | |
2245 | * transport_add_task_check_sam_attr(). | |
2246 | */ | |
2247 | transport_add_tasks_from_cmd(cmd); | |
2248 | } | |
2249 | /* | |
2250 | * Kick the execution queue for the cmd associated struct se_device | |
2251 | * storage object. | |
2252 | */ | |
2253 | execute_tasks: | |
5951146d | 2254 | __transport_execute_tasks(cmd->se_dev); |
c66ac9db NB |
2255 | return 0; |
2256 | } | |
2257 | ||
2258 | /* | |
2259 | * Called to check struct se_device tcq depth window, and once open pull struct se_task | |
2260 | * from struct se_device->execute_task_list and | |
2261 | * | |
2262 | * Called from transport_processing_thread() | |
2263 | */ | |
2264 | static int __transport_execute_tasks(struct se_device *dev) | |
2265 | { | |
2266 | int error; | |
2267 | struct se_cmd *cmd = NULL; | |
e3d6f909 | 2268 | struct se_task *task = NULL; |
c66ac9db NB |
2269 | unsigned long flags; |
2270 | ||
2271 | /* | |
2272 | * Check if there is enough room in the device and HBA queue to send | |
a1d8b49a | 2273 | * struct se_tasks to the selected transport. |
c66ac9db NB |
2274 | */ |
2275 | check_depth: | |
e3d6f909 | 2276 | if (!atomic_read(&dev->depth_left)) |
c66ac9db | 2277 | return transport_tcq_window_closed(dev); |
c66ac9db | 2278 | |
e3d6f909 | 2279 | dev->dev_tcq_window_closed = 0; |
c66ac9db | 2280 | |
e3d6f909 AG |
2281 | spin_lock_irq(&dev->execute_task_lock); |
2282 | if (list_empty(&dev->execute_task_list)) { | |
2283 | spin_unlock_irq(&dev->execute_task_lock); | |
c66ac9db NB |
2284 | return 0; |
2285 | } | |
e3d6f909 AG |
2286 | task = list_first_entry(&dev->execute_task_list, |
2287 | struct se_task, t_execute_list); | |
04629b7b | 2288 | __transport_remove_task_from_execute_queue(task, dev); |
e3d6f909 | 2289 | spin_unlock_irq(&dev->execute_task_lock); |
c66ac9db NB |
2290 | |
2291 | atomic_dec(&dev->depth_left); | |
c66ac9db | 2292 | |
e3d6f909 | 2293 | cmd = task->task_se_cmd; |
c66ac9db | 2294 | |
a1d8b49a | 2295 | spin_lock_irqsave(&cmd->t_state_lock, flags); |
6c76bf95 | 2296 | task->task_flags |= (TF_ACTIVE | TF_SENT); |
a1d8b49a | 2297 | atomic_inc(&cmd->t_task_cdbs_sent); |
c66ac9db | 2298 | |
a1d8b49a AG |
2299 | if (atomic_read(&cmd->t_task_cdbs_sent) == |
2300 | cmd->t_task_list_num) | |
c66ac9db NB |
2301 | atomic_set(&cmd->transport_sent, 1); |
2302 | ||
2303 | transport_start_task_timer(task); | |
a1d8b49a | 2304 | spin_unlock_irqrestore(&cmd->t_state_lock, flags); |
c66ac9db NB |
2305 | /* |
2306 | * The struct se_cmd->transport_emulate_cdb() function pointer is used | |
e3d6f909 | 2307 | * to grab REPORT_LUNS and other CDBs we want to handle before they hit the |
c66ac9db NB |
2308 | * struct se_subsystem_api->do_task() caller below. |
2309 | */ | |
2310 | if (cmd->transport_emulate_cdb) { | |
2311 | error = cmd->transport_emulate_cdb(cmd); | |
2312 | if (error != 0) { | |
2313 | cmd->transport_error_status = error; | |
6c76bf95 CH |
2314 | spin_lock_irqsave(&cmd->t_state_lock, flags); |
2315 | task->task_flags &= ~TF_ACTIVE; | |
2316 | spin_unlock_irqrestore(&cmd->t_state_lock, flags); | |
cc5d0f0f | 2317 | del_timer_sync(&task->task_timer); |
c66ac9db NB |
2318 | atomic_set(&cmd->transport_sent, 0); |
2319 | transport_stop_tasks_for_cmd(cmd); | |
4499dda8 CH |
2320 | atomic_inc(&dev->depth_left); |
2321 | transport_generic_request_failure(cmd, 0, 1); | |
c66ac9db NB |
2322 | goto check_depth; |
2323 | } | |
2324 | /* | |
2325 | * Handle the successful completion for transport_emulate_cdb() | |
2326 | * for synchronous operation, following SCF_EMULATE_CDB_ASYNC | |
2327 | * Otherwise the caller is expected to complete the task with | |
2328 | * proper status. | |
2329 | */ | |
2330 | if (!(cmd->se_cmd_flags & SCF_EMULATE_CDB_ASYNC)) { | |
2331 | cmd->scsi_status = SAM_STAT_GOOD; | |
2332 | task->task_scsi_status = GOOD; | |
2333 | transport_complete_task(task, 1); | |
2334 | } | |
2335 | } else { | |
2336 | /* | |
2337 | * Currently for all virtual TCM plugins including IBLOCK, FILEIO and | |
2338 | * RAMDISK we use the internal transport_emulate_control_cdb() logic | |
2339 | * with struct se_subsystem_api callers for the primary SPC-3 TYPE_DISK | |
2340 | * LUN emulation code. | |
2341 | * | |
2342 | * For TCM/pSCSI and all other SCF_SCSI_DATA_SG_IO_CDB I/O tasks we | |
2343 | * call ->do_task() directly and let the underlying TCM subsystem plugin | |
2344 | * code handle the CDB emulation. | |
2345 | */ | |
e3d6f909 AG |
2346 | if ((dev->transport->transport_type != TRANSPORT_PLUGIN_PHBA_PDEV) && |
2347 | (!(task->task_se_cmd->se_cmd_flags & SCF_SCSI_DATA_SG_IO_CDB))) | |
c66ac9db NB |
2348 | error = transport_emulate_control_cdb(task); |
2349 | else | |
e3d6f909 | 2350 | error = dev->transport->do_task(task); |
c66ac9db NB |
2351 | |
2352 | if (error != 0) { | |
2353 | cmd->transport_error_status = error; | |
6c76bf95 CH |
2354 | spin_lock_irqsave(&cmd->t_state_lock, flags); |
2355 | task->task_flags &= ~TF_ACTIVE; | |
2356 | spin_unlock_irqrestore(&cmd->t_state_lock, flags); | |
cc5d0f0f | 2357 | del_timer_sync(&task->task_timer); |
c66ac9db NB |
2358 | atomic_set(&cmd->transport_sent, 0); |
2359 | transport_stop_tasks_for_cmd(cmd); | |
4499dda8 CH |
2360 | atomic_inc(&dev->depth_left); |
2361 | transport_generic_request_failure(cmd, 0, 1); | |
c66ac9db NB |
2362 | } |
2363 | } | |
2364 | ||
2365 | goto check_depth; | |
2366 | ||
2367 | return 0; | |
2368 | } | |
2369 | ||
2370 | void transport_new_cmd_failure(struct se_cmd *se_cmd) | |
2371 | { | |
2372 | unsigned long flags; | |
2373 | /* | |
2374 | * Any unsolicited data will get dumped for failed command inside of | |
2375 | * the fabric plugin | |
2376 | */ | |
a1d8b49a | 2377 | spin_lock_irqsave(&se_cmd->t_state_lock, flags); |
c66ac9db NB |
2378 | se_cmd->se_cmd_flags |= SCF_SE_CMD_FAILED; |
2379 | se_cmd->se_cmd_flags |= SCF_SCSI_CDB_EXCEPTION; | |
a1d8b49a | 2380 | spin_unlock_irqrestore(&se_cmd->t_state_lock, flags); |
c66ac9db NB |
2381 | } |
2382 | ||
c66ac9db NB |
2383 | static inline u32 transport_get_sectors_6( |
2384 | unsigned char *cdb, | |
2385 | struct se_cmd *cmd, | |
2386 | int *ret) | |
2387 | { | |
5951146d | 2388 | struct se_device *dev = cmd->se_dev; |
c66ac9db NB |
2389 | |
2390 | /* | |
2391 | * Assume TYPE_DISK for non struct se_device objects. | |
2392 | * Use 8-bit sector value. | |
2393 | */ | |
2394 | if (!dev) | |
2395 | goto type_disk; | |
2396 | ||
2397 | /* | |
2398 | * Use 24-bit allocation length for TYPE_TAPE. | |
2399 | */ | |
e3d6f909 | 2400 | if (dev->transport->get_device_type(dev) == TYPE_TAPE) |
c66ac9db NB |
2401 | return (u32)(cdb[2] << 16) + (cdb[3] << 8) + cdb[4]; |
2402 | ||
2403 | /* | |
2404 | * Everything else assume TYPE_DISK Sector CDB location. | |
2405 | * Use 8-bit sector value. | |
2406 | */ | |
2407 | type_disk: | |
2408 | return (u32)cdb[4]; | |
2409 | } | |
2410 | ||
2411 | static inline u32 transport_get_sectors_10( | |
2412 | unsigned char *cdb, | |
2413 | struct se_cmd *cmd, | |
2414 | int *ret) | |
2415 | { | |
5951146d | 2416 | struct se_device *dev = cmd->se_dev; |
c66ac9db NB |
2417 | |
2418 | /* | |
2419 | * Assume TYPE_DISK for non struct se_device objects. | |
2420 | * Use 16-bit sector value. | |
2421 | */ | |
2422 | if (!dev) | |
2423 | goto type_disk; | |
2424 | ||
2425 | /* | |
2426 | * XXX_10 is not defined in SSC, throw an exception | |
2427 | */ | |
e3d6f909 AG |
2428 | if (dev->transport->get_device_type(dev) == TYPE_TAPE) { |
2429 | *ret = -EINVAL; | |
c66ac9db NB |
2430 | return 0; |
2431 | } | |
2432 | ||
2433 | /* | |
2434 | * Everything else assume TYPE_DISK Sector CDB location. | |
2435 | * Use 16-bit sector value. | |
2436 | */ | |
2437 | type_disk: | |
2438 | return (u32)(cdb[7] << 8) + cdb[8]; | |
2439 | } | |
2440 | ||
2441 | static inline u32 transport_get_sectors_12( | |
2442 | unsigned char *cdb, | |
2443 | struct se_cmd *cmd, | |
2444 | int *ret) | |
2445 | { | |
5951146d | 2446 | struct se_device *dev = cmd->se_dev; |
c66ac9db NB |
2447 | |
2448 | /* | |
2449 | * Assume TYPE_DISK for non struct se_device objects. | |
2450 | * Use 32-bit sector value. | |
2451 | */ | |
2452 | if (!dev) | |
2453 | goto type_disk; | |
2454 | ||
2455 | /* | |
2456 | * XXX_12 is not defined in SSC, throw an exception | |
2457 | */ | |
e3d6f909 AG |
2458 | if (dev->transport->get_device_type(dev) == TYPE_TAPE) { |
2459 | *ret = -EINVAL; | |
c66ac9db NB |
2460 | return 0; |
2461 | } | |
2462 | ||
2463 | /* | |
2464 | * Everything else assume TYPE_DISK Sector CDB location. | |
2465 | * Use 32-bit sector value. | |
2466 | */ | |
2467 | type_disk: | |
2468 | return (u32)(cdb[6] << 24) + (cdb[7] << 16) + (cdb[8] << 8) + cdb[9]; | |
2469 | } | |
2470 | ||
2471 | static inline u32 transport_get_sectors_16( | |
2472 | unsigned char *cdb, | |
2473 | struct se_cmd *cmd, | |
2474 | int *ret) | |
2475 | { | |
5951146d | 2476 | struct se_device *dev = cmd->se_dev; |
c66ac9db NB |
2477 | |
2478 | /* | |
2479 | * Assume TYPE_DISK for non struct se_device objects. | |
2480 | * Use 32-bit sector value. | |
2481 | */ | |
2482 | if (!dev) | |
2483 | goto type_disk; | |
2484 | ||
2485 | /* | |
2486 | * Use 24-bit allocation length for TYPE_TAPE. | |
2487 | */ | |
e3d6f909 | 2488 | if (dev->transport->get_device_type(dev) == TYPE_TAPE) |
c66ac9db NB |
2489 | return (u32)(cdb[12] << 16) + (cdb[13] << 8) + cdb[14]; |
2490 | ||
2491 | type_disk: | |
2492 | return (u32)(cdb[10] << 24) + (cdb[11] << 16) + | |
2493 | (cdb[12] << 8) + cdb[13]; | |
2494 | } | |
2495 | ||
2496 | /* | |
2497 | * Used for VARIABLE_LENGTH_CDB WRITE_32 and READ_32 variants | |
2498 | */ | |
2499 | static inline u32 transport_get_sectors_32( | |
2500 | unsigned char *cdb, | |
2501 | struct se_cmd *cmd, | |
2502 | int *ret) | |
2503 | { | |
2504 | /* | |
2505 | * Assume TYPE_DISK for non struct se_device objects. | |
2506 | * Use 32-bit sector value. | |
2507 | */ | |
2508 | return (u32)(cdb[28] << 24) + (cdb[29] << 16) + | |
2509 | (cdb[30] << 8) + cdb[31]; | |
2510 | ||
2511 | } | |
2512 | ||
2513 | static inline u32 transport_get_size( | |
2514 | u32 sectors, | |
2515 | unsigned char *cdb, | |
2516 | struct se_cmd *cmd) | |
2517 | { | |
5951146d | 2518 | struct se_device *dev = cmd->se_dev; |
c66ac9db | 2519 | |
e3d6f909 | 2520 | if (dev->transport->get_device_type(dev) == TYPE_TAPE) { |
c66ac9db | 2521 | if (cdb[1] & 1) { /* sectors */ |
e3d6f909 | 2522 | return dev->se_sub_dev->se_dev_attrib.block_size * sectors; |
c66ac9db NB |
2523 | } else /* bytes */ |
2524 | return sectors; | |
2525 | } | |
2526 | #if 0 | |
6708bb27 | 2527 | pr_debug("Returning block_size: %u, sectors: %u == %u for" |
e3d6f909 AG |
2528 | " %s object\n", dev->se_sub_dev->se_dev_attrib.block_size, sectors, |
2529 | dev->se_sub_dev->se_dev_attrib.block_size * sectors, | |
2530 | dev->transport->name); | |
c66ac9db | 2531 | #endif |
e3d6f909 | 2532 | return dev->se_sub_dev->se_dev_attrib.block_size * sectors; |
c66ac9db NB |
2533 | } |
2534 | ||
c66ac9db NB |
2535 | static void transport_xor_callback(struct se_cmd *cmd) |
2536 | { | |
2537 | unsigned char *buf, *addr; | |
ec98f782 | 2538 | struct scatterlist *sg; |
c66ac9db NB |
2539 | unsigned int offset; |
2540 | int i; | |
ec98f782 | 2541 | int count; |
c66ac9db NB |
2542 | /* |
2543 | * From sbc3r22.pdf section 5.48 XDWRITEREAD (10) command | |
2544 | * | |
2545 | * 1) read the specified logical block(s); | |
2546 | * 2) transfer logical blocks from the data-out buffer; | |
2547 | * 3) XOR the logical blocks transferred from the data-out buffer with | |
2548 | * the logical blocks read, storing the resulting XOR data in a buffer; | |
2549 | * 4) if the DISABLE WRITE bit is set to zero, then write the logical | |
2550 | * blocks transferred from the data-out buffer; and | |
2551 | * 5) transfer the resulting XOR data to the data-in buffer. | |
2552 | */ | |
2553 | buf = kmalloc(cmd->data_length, GFP_KERNEL); | |
6708bb27 AG |
2554 | if (!buf) { |
2555 | pr_err("Unable to allocate xor_callback buf\n"); | |
c66ac9db NB |
2556 | return; |
2557 | } | |
2558 | /* | |
ec98f782 | 2559 | * Copy the scatterlist WRITE buffer located at cmd->t_data_sg |
c66ac9db NB |
2560 | * into the locally allocated *buf |
2561 | */ | |
ec98f782 AG |
2562 | sg_copy_to_buffer(cmd->t_data_sg, |
2563 | cmd->t_data_nents, | |
2564 | buf, | |
2565 | cmd->data_length); | |
2566 | ||
c66ac9db NB |
2567 | /* |
2568 | * Now perform the XOR against the BIDI read memory located at | |
a1d8b49a | 2569 | * cmd->t_mem_bidi_list |
c66ac9db NB |
2570 | */ |
2571 | ||
2572 | offset = 0; | |
ec98f782 AG |
2573 | for_each_sg(cmd->t_bidi_data_sg, sg, cmd->t_bidi_data_nents, count) { |
2574 | addr = kmap_atomic(sg_page(sg), KM_USER0); | |
2575 | if (!addr) | |
c66ac9db NB |
2576 | goto out; |
2577 | ||
ec98f782 AG |
2578 | for (i = 0; i < sg->length; i++) |
2579 | *(addr + sg->offset + i) ^= *(buf + offset + i); | |
c66ac9db | 2580 | |
ec98f782 | 2581 | offset += sg->length; |
c66ac9db NB |
2582 | kunmap_atomic(addr, KM_USER0); |
2583 | } | |
ec98f782 | 2584 | |
c66ac9db NB |
2585 | out: |
2586 | kfree(buf); | |
2587 | } | |
2588 | ||
2589 | /* | |
2590 | * Used to obtain Sense Data from underlying Linux/SCSI struct scsi_cmnd | |
2591 | */ | |
2592 | static int transport_get_sense_data(struct se_cmd *cmd) | |
2593 | { | |
2594 | unsigned char *buffer = cmd->sense_buffer, *sense_buffer = NULL; | |
42bf829e | 2595 | struct se_device *dev = cmd->se_dev; |
c66ac9db NB |
2596 | struct se_task *task = NULL, *task_tmp; |
2597 | unsigned long flags; | |
2598 | u32 offset = 0; | |
2599 | ||
e3d6f909 AG |
2600 | WARN_ON(!cmd->se_lun); |
2601 | ||
42bf829e CH |
2602 | if (!dev) |
2603 | return 0; | |
2604 | ||
a1d8b49a | 2605 | spin_lock_irqsave(&cmd->t_state_lock, flags); |
c66ac9db | 2606 | if (cmd->se_cmd_flags & SCF_SENT_CHECK_CONDITION) { |
a1d8b49a | 2607 | spin_unlock_irqrestore(&cmd->t_state_lock, flags); |
c66ac9db NB |
2608 | return 0; |
2609 | } | |
2610 | ||
2611 | list_for_each_entry_safe(task, task_tmp, | |
a1d8b49a | 2612 | &cmd->t_task_list, t_list) { |
c66ac9db NB |
2613 | if (!task->task_sense) |
2614 | continue; | |
2615 | ||
e3d6f909 | 2616 | if (!dev->transport->get_sense_buffer) { |
6708bb27 | 2617 | pr_err("dev->transport->get_sense_buffer" |
c66ac9db NB |
2618 | " is NULL\n"); |
2619 | continue; | |
2620 | } | |
2621 | ||
e3d6f909 | 2622 | sense_buffer = dev->transport->get_sense_buffer(task); |
6708bb27 | 2623 | if (!sense_buffer) { |
04629b7b | 2624 | pr_err("ITT[0x%08x]_TASK[%p]: Unable to locate" |
c66ac9db | 2625 | " sense buffer for task with sense\n", |
04629b7b | 2626 | cmd->se_tfo->get_task_tag(cmd), task); |
c66ac9db NB |
2627 | continue; |
2628 | } | |
a1d8b49a | 2629 | spin_unlock_irqrestore(&cmd->t_state_lock, flags); |
c66ac9db | 2630 | |
e3d6f909 | 2631 | offset = cmd->se_tfo->set_fabric_sense_len(cmd, |
c66ac9db NB |
2632 | TRANSPORT_SENSE_BUFFER); |
2633 | ||
5951146d | 2634 | memcpy(&buffer[offset], sense_buffer, |
c66ac9db NB |
2635 | TRANSPORT_SENSE_BUFFER); |
2636 | cmd->scsi_status = task->task_scsi_status; | |
2637 | /* Automatically padded */ | |
2638 | cmd->scsi_sense_length = | |
2639 | (TRANSPORT_SENSE_BUFFER + offset); | |
2640 | ||
6708bb27 | 2641 | pr_debug("HBA_[%u]_PLUG[%s]: Set SAM STATUS: 0x%02x" |
c66ac9db | 2642 | " and sense\n", |
e3d6f909 | 2643 | dev->se_hba->hba_id, dev->transport->name, |
c66ac9db NB |
2644 | cmd->scsi_status); |
2645 | return 0; | |
2646 | } | |
a1d8b49a | 2647 | spin_unlock_irqrestore(&cmd->t_state_lock, flags); |
c66ac9db NB |
2648 | |
2649 | return -1; | |
2650 | } | |
2651 | ||
c66ac9db NB |
2652 | static int |
2653 | transport_handle_reservation_conflict(struct se_cmd *cmd) | |
2654 | { | |
c66ac9db NB |
2655 | cmd->se_cmd_flags |= SCF_SCSI_CDB_EXCEPTION; |
2656 | cmd->se_cmd_flags |= SCF_SCSI_RESERVATION_CONFLICT; | |
2657 | cmd->scsi_status = SAM_STAT_RESERVATION_CONFLICT; | |
2658 | /* | |
2659 | * For UA Interlock Code 11b, a RESERVATION CONFLICT will | |
2660 | * establish a UNIT ATTENTION with PREVIOUS RESERVATION | |
2661 | * CONFLICT STATUS. | |
2662 | * | |
2663 | * See spc4r17, section 7.4.6 Control Mode Page, Table 349 | |
2664 | */ | |
e3d6f909 AG |
2665 | if (cmd->se_sess && |
2666 | cmd->se_dev->se_sub_dev->se_dev_attrib.emulate_ua_intlck_ctrl == 2) | |
2667 | core_scsi3_ua_allocate(cmd->se_sess->se_node_acl, | |
c66ac9db NB |
2668 | cmd->orig_fe_lun, 0x2C, |
2669 | ASCQ_2CH_PREVIOUS_RESERVATION_CONFLICT_STATUS); | |
5951146d | 2670 | return -EINVAL; |
c66ac9db NB |
2671 | } |
2672 | ||
ec98f782 AG |
2673 | static inline long long transport_dev_end_lba(struct se_device *dev) |
2674 | { | |
2675 | return dev->transport->get_blocks(dev) + 1; | |
2676 | } | |
2677 | ||
2678 | static int transport_cmd_get_valid_sectors(struct se_cmd *cmd) | |
2679 | { | |
2680 | struct se_device *dev = cmd->se_dev; | |
2681 | u32 sectors; | |
2682 | ||
2683 | if (dev->transport->get_device_type(dev) != TYPE_DISK) | |
2684 | return 0; | |
2685 | ||
2686 | sectors = (cmd->data_length / dev->se_sub_dev->se_dev_attrib.block_size); | |
2687 | ||
6708bb27 AG |
2688 | if ((cmd->t_task_lba + sectors) > transport_dev_end_lba(dev)) { |
2689 | pr_err("LBA: %llu Sectors: %u exceeds" | |
ec98f782 AG |
2690 | " transport_dev_end_lba(): %llu\n", |
2691 | cmd->t_task_lba, sectors, | |
2692 | transport_dev_end_lba(dev)); | |
7abbe7f3 | 2693 | return -EINVAL; |
ec98f782 AG |
2694 | } |
2695 | ||
7abbe7f3 | 2696 | return 0; |
ec98f782 AG |
2697 | } |
2698 | ||
706d5860 NB |
2699 | static int target_check_write_same_discard(unsigned char *flags, struct se_device *dev) |
2700 | { | |
2701 | /* | |
2702 | * Determine if the received WRITE_SAME is used to for direct | |
2703 | * passthrough into Linux/SCSI with struct request via TCM/pSCSI | |
2704 | * or we are signaling the use of internal WRITE_SAME + UNMAP=1 | |
2705 | * emulation for -> Linux/BLOCK disbard with TCM/IBLOCK code. | |
2706 | */ | |
2707 | int passthrough = (dev->transport->transport_type == | |
2708 | TRANSPORT_PLUGIN_PHBA_PDEV); | |
2709 | ||
2710 | if (!passthrough) { | |
2711 | if ((flags[0] & 0x04) || (flags[0] & 0x02)) { | |
2712 | pr_err("WRITE_SAME PBDATA and LBDATA" | |
2713 | " bits not supported for Block Discard" | |
2714 | " Emulation\n"); | |
2715 | return -ENOSYS; | |
2716 | } | |
2717 | /* | |
2718 | * Currently for the emulated case we only accept | |
2719 | * tpws with the UNMAP=1 bit set. | |
2720 | */ | |
2721 | if (!(flags[0] & 0x08)) { | |
2722 | pr_err("WRITE_SAME w/o UNMAP bit not" | |
2723 | " supported for Block Discard Emulation\n"); | |
2724 | return -ENOSYS; | |
2725 | } | |
2726 | } | |
2727 | ||
2728 | return 0; | |
2729 | } | |
2730 | ||
c66ac9db NB |
2731 | /* transport_generic_cmd_sequencer(): |
2732 | * | |
2733 | * Generic Command Sequencer that should work for most DAS transport | |
2734 | * drivers. | |
2735 | * | |
2736 | * Called from transport_generic_allocate_tasks() in the $FABRIC_MOD | |
2737 | * RX Thread. | |
2738 | * | |
2739 | * FIXME: Need to support other SCSI OPCODES where as well. | |
2740 | */ | |
2741 | static int transport_generic_cmd_sequencer( | |
2742 | struct se_cmd *cmd, | |
2743 | unsigned char *cdb) | |
2744 | { | |
5951146d | 2745 | struct se_device *dev = cmd->se_dev; |
c66ac9db NB |
2746 | struct se_subsystem_dev *su_dev = dev->se_sub_dev; |
2747 | int ret = 0, sector_ret = 0, passthrough; | |
2748 | u32 sectors = 0, size = 0, pr_reg_type = 0; | |
2749 | u16 service_action; | |
2750 | u8 alua_ascq = 0; | |
2751 | /* | |
2752 | * Check for an existing UNIT ATTENTION condition | |
2753 | */ | |
2754 | if (core_scsi3_ua_check(cmd, cdb) < 0) { | |
c66ac9db NB |
2755 | cmd->se_cmd_flags |= SCF_SCSI_CDB_EXCEPTION; |
2756 | cmd->scsi_sense_reason = TCM_CHECK_CONDITION_UNIT_ATTENTION; | |
5951146d | 2757 | return -EINVAL; |
c66ac9db NB |
2758 | } |
2759 | /* | |
2760 | * Check status of Asymmetric Logical Unit Assignment port | |
2761 | */ | |
e3d6f909 | 2762 | ret = su_dev->t10_alua.alua_state_check(cmd, cdb, &alua_ascq); |
c66ac9db | 2763 | if (ret != 0) { |
c66ac9db | 2764 | /* |
25985edc | 2765 | * Set SCSI additional sense code (ASC) to 'LUN Not Accessible'; |
c66ac9db NB |
2766 | * The ALUA additional sense code qualifier (ASCQ) is determined |
2767 | * by the ALUA primary or secondary access state.. | |
2768 | */ | |
2769 | if (ret > 0) { | |
2770 | #if 0 | |
6708bb27 | 2771 | pr_debug("[%s]: ALUA TG Port not available," |
c66ac9db | 2772 | " SenseKey: NOT_READY, ASC/ASCQ: 0x04/0x%02x\n", |
e3d6f909 | 2773 | cmd->se_tfo->get_fabric_name(), alua_ascq); |
c66ac9db NB |
2774 | #endif |
2775 | transport_set_sense_codes(cmd, 0x04, alua_ascq); | |
2776 | cmd->se_cmd_flags |= SCF_SCSI_CDB_EXCEPTION; | |
2777 | cmd->scsi_sense_reason = TCM_CHECK_CONDITION_NOT_READY; | |
5951146d | 2778 | return -EINVAL; |
c66ac9db NB |
2779 | } |
2780 | goto out_invalid_cdb_field; | |
2781 | } | |
2782 | /* | |
2783 | * Check status for SPC-3 Persistent Reservations | |
2784 | */ | |
e3d6f909 AG |
2785 | if (su_dev->t10_pr.pr_ops.t10_reservation_check(cmd, &pr_reg_type) != 0) { |
2786 | if (su_dev->t10_pr.pr_ops.t10_seq_non_holder( | |
c66ac9db NB |
2787 | cmd, cdb, pr_reg_type) != 0) |
2788 | return transport_handle_reservation_conflict(cmd); | |
2789 | /* | |
2790 | * This means the CDB is allowed for the SCSI Initiator port | |
2791 | * when said port is *NOT* holding the legacy SPC-2 or | |
2792 | * SPC-3 Persistent Reservation. | |
2793 | */ | |
2794 | } | |
2795 | ||
2796 | switch (cdb[0]) { | |
2797 | case READ_6: | |
2798 | sectors = transport_get_sectors_6(cdb, cmd, §or_ret); | |
2799 | if (sector_ret) | |
2800 | goto out_unsupported_cdb; | |
2801 | size = transport_get_size(sectors, cdb, cmd); | |
a1d8b49a | 2802 | cmd->t_task_lba = transport_lba_21(cdb); |
c66ac9db NB |
2803 | cmd->se_cmd_flags |= SCF_SCSI_DATA_SG_IO_CDB; |
2804 | break; | |
2805 | case READ_10: | |
2806 | sectors = transport_get_sectors_10(cdb, cmd, §or_ret); | |
2807 | if (sector_ret) | |
2808 | goto out_unsupported_cdb; | |
2809 | size = transport_get_size(sectors, cdb, cmd); | |
a1d8b49a | 2810 | cmd->t_task_lba = transport_lba_32(cdb); |
c66ac9db NB |
2811 | cmd->se_cmd_flags |= SCF_SCSI_DATA_SG_IO_CDB; |
2812 | break; | |
2813 | case READ_12: | |
2814 | sectors = transport_get_sectors_12(cdb, cmd, §or_ret); | |
2815 | if (sector_ret) | |
2816 | goto out_unsupported_cdb; | |
2817 | size = transport_get_size(sectors, cdb, cmd); | |
a1d8b49a | 2818 | cmd->t_task_lba = transport_lba_32(cdb); |
c66ac9db NB |
2819 | cmd->se_cmd_flags |= SCF_SCSI_DATA_SG_IO_CDB; |
2820 | break; | |
2821 | case READ_16: | |
2822 | sectors = transport_get_sectors_16(cdb, cmd, §or_ret); | |
2823 | if (sector_ret) | |
2824 | goto out_unsupported_cdb; | |
2825 | size = transport_get_size(sectors, cdb, cmd); | |
a1d8b49a | 2826 | cmd->t_task_lba = transport_lba_64(cdb); |
c66ac9db NB |
2827 | cmd->se_cmd_flags |= SCF_SCSI_DATA_SG_IO_CDB; |
2828 | break; | |
2829 | case WRITE_6: | |
2830 | sectors = transport_get_sectors_6(cdb, cmd, §or_ret); | |
2831 | if (sector_ret) | |
2832 | goto out_unsupported_cdb; | |
2833 | size = transport_get_size(sectors, cdb, cmd); | |
a1d8b49a | 2834 | cmd->t_task_lba = transport_lba_21(cdb); |
c66ac9db NB |
2835 | cmd->se_cmd_flags |= SCF_SCSI_DATA_SG_IO_CDB; |
2836 | break; | |
2837 | case WRITE_10: | |
2838 | sectors = transport_get_sectors_10(cdb, cmd, §or_ret); | |
2839 | if (sector_ret) | |
2840 | goto out_unsupported_cdb; | |
2841 | size = transport_get_size(sectors, cdb, cmd); | |
a1d8b49a AG |
2842 | cmd->t_task_lba = transport_lba_32(cdb); |
2843 | cmd->t_tasks_fua = (cdb[1] & 0x8); | |
c66ac9db NB |
2844 | cmd->se_cmd_flags |= SCF_SCSI_DATA_SG_IO_CDB; |
2845 | break; | |
2846 | case WRITE_12: | |
2847 | sectors = transport_get_sectors_12(cdb, cmd, §or_ret); | |
2848 | if (sector_ret) | |
2849 | goto out_unsupported_cdb; | |
2850 | size = transport_get_size(sectors, cdb, cmd); | |
a1d8b49a AG |
2851 | cmd->t_task_lba = transport_lba_32(cdb); |
2852 | cmd->t_tasks_fua = (cdb[1] & 0x8); | |
c66ac9db NB |
2853 | cmd->se_cmd_flags |= SCF_SCSI_DATA_SG_IO_CDB; |
2854 | break; | |
2855 | case WRITE_16: | |
2856 | sectors = transport_get_sectors_16(cdb, cmd, §or_ret); | |
2857 | if (sector_ret) | |
2858 | goto out_unsupported_cdb; | |
2859 | size = transport_get_size(sectors, cdb, cmd); | |
a1d8b49a AG |
2860 | cmd->t_task_lba = transport_lba_64(cdb); |
2861 | cmd->t_tasks_fua = (cdb[1] & 0x8); | |
c66ac9db NB |
2862 | cmd->se_cmd_flags |= SCF_SCSI_DATA_SG_IO_CDB; |
2863 | break; | |
2864 | case XDWRITEREAD_10: | |
2865 | if ((cmd->data_direction != DMA_TO_DEVICE) || | |
a1d8b49a | 2866 | !(cmd->t_tasks_bidi)) |
c66ac9db NB |
2867 | goto out_invalid_cdb_field; |
2868 | sectors = transport_get_sectors_10(cdb, cmd, §or_ret); | |
2869 | if (sector_ret) | |
2870 | goto out_unsupported_cdb; | |
2871 | size = transport_get_size(sectors, cdb, cmd); | |
a1d8b49a | 2872 | cmd->t_task_lba = transport_lba_32(cdb); |
c66ac9db | 2873 | cmd->se_cmd_flags |= SCF_SCSI_DATA_SG_IO_CDB; |
e3d6f909 | 2874 | passthrough = (dev->transport->transport_type == |
c66ac9db NB |
2875 | TRANSPORT_PLUGIN_PHBA_PDEV); |
2876 | /* | |
2877 | * Skip the remaining assignments for TCM/PSCSI passthrough | |
2878 | */ | |
2879 | if (passthrough) | |
2880 | break; | |
2881 | /* | |
35e0e757 | 2882 | * Setup BIDI XOR callback to be run after I/O completion. |
c66ac9db NB |
2883 | */ |
2884 | cmd->transport_complete_callback = &transport_xor_callback; | |
a1d8b49a | 2885 | cmd->t_tasks_fua = (cdb[1] & 0x8); |
c66ac9db NB |
2886 | break; |
2887 | case VARIABLE_LENGTH_CMD: | |
2888 | service_action = get_unaligned_be16(&cdb[8]); | |
2889 | /* | |
2890 | * Determine if this is TCM/PSCSI device and we should disable | |
2891 | * internal emulation for this CDB. | |
2892 | */ | |
e3d6f909 | 2893 | passthrough = (dev->transport->transport_type == |
c66ac9db NB |
2894 | TRANSPORT_PLUGIN_PHBA_PDEV); |
2895 | ||
2896 | switch (service_action) { | |
2897 | case XDWRITEREAD_32: | |
2898 | sectors = transport_get_sectors_32(cdb, cmd, §or_ret); | |
2899 | if (sector_ret) | |
2900 | goto out_unsupported_cdb; | |
2901 | size = transport_get_size(sectors, cdb, cmd); | |
2902 | /* | |
2903 | * Use WRITE_32 and READ_32 opcodes for the emulated | |
2904 | * XDWRITE_READ_32 logic. | |
2905 | */ | |
a1d8b49a | 2906 | cmd->t_task_lba = transport_lba_64_ext(cdb); |
c66ac9db NB |
2907 | cmd->se_cmd_flags |= SCF_SCSI_DATA_SG_IO_CDB; |
2908 | ||
2909 | /* | |
2910 | * Skip the remaining assignments for TCM/PSCSI passthrough | |
2911 | */ | |
2912 | if (passthrough) | |
2913 | break; | |
2914 | ||
2915 | /* | |
35e0e757 CH |
2916 | * Setup BIDI XOR callback to be run during after I/O |
2917 | * completion. | |
c66ac9db NB |
2918 | */ |
2919 | cmd->transport_complete_callback = &transport_xor_callback; | |
a1d8b49a | 2920 | cmd->t_tasks_fua = (cdb[10] & 0x8); |
c66ac9db NB |
2921 | break; |
2922 | case WRITE_SAME_32: | |
2923 | sectors = transport_get_sectors_32(cdb, cmd, §or_ret); | |
2924 | if (sector_ret) | |
2925 | goto out_unsupported_cdb; | |
dd3a5ad8 | 2926 | |
6708bb27 | 2927 | if (sectors) |
12850626 | 2928 | size = transport_get_size(1, cdb, cmd); |
6708bb27 AG |
2929 | else { |
2930 | pr_err("WSNZ=1, WRITE_SAME w/sectors=0 not" | |
2931 | " supported\n"); | |
2932 | goto out_invalid_cdb_field; | |
2933 | } | |
dd3a5ad8 | 2934 | |
a1d8b49a | 2935 | cmd->t_task_lba = get_unaligned_be64(&cdb[12]); |
c66ac9db NB |
2936 | cmd->se_cmd_flags |= SCF_SCSI_CONTROL_SG_IO_CDB; |
2937 | ||
706d5860 | 2938 | if (target_check_write_same_discard(&cdb[10], dev) < 0) |
c66ac9db | 2939 | goto out_invalid_cdb_field; |
706d5860 | 2940 | |
c66ac9db NB |
2941 | break; |
2942 | default: | |
6708bb27 | 2943 | pr_err("VARIABLE_LENGTH_CMD service action" |
c66ac9db NB |
2944 | " 0x%04x not supported\n", service_action); |
2945 | goto out_unsupported_cdb; | |
2946 | } | |
2947 | break; | |
e434f1f1 | 2948 | case MAINTENANCE_IN: |
e3d6f909 | 2949 | if (dev->transport->get_device_type(dev) != TYPE_ROM) { |
c66ac9db NB |
2950 | /* MAINTENANCE_IN from SCC-2 */ |
2951 | /* | |
2952 | * Check for emulated MI_REPORT_TARGET_PGS. | |
2953 | */ | |
2954 | if (cdb[1] == MI_REPORT_TARGET_PGS) { | |
2955 | cmd->transport_emulate_cdb = | |
e3d6f909 | 2956 | (su_dev->t10_alua.alua_type == |
c66ac9db | 2957 | SPC3_ALUA_EMULATED) ? |
e3d6f909 | 2958 | core_emulate_report_target_port_groups : |
c66ac9db NB |
2959 | NULL; |
2960 | } | |
2961 | size = (cdb[6] << 24) | (cdb[7] << 16) | | |
2962 | (cdb[8] << 8) | cdb[9]; | |
2963 | } else { | |
2964 | /* GPCMD_SEND_KEY from multi media commands */ | |
2965 | size = (cdb[8] << 8) + cdb[9]; | |
2966 | } | |
05d1c7c0 | 2967 | cmd->se_cmd_flags |= SCF_SCSI_CONTROL_SG_IO_CDB; |
c66ac9db NB |
2968 | break; |
2969 | case MODE_SELECT: | |
2970 | size = cdb[4]; | |
2971 | cmd->se_cmd_flags |= SCF_SCSI_CONTROL_SG_IO_CDB; | |
2972 | break; | |
2973 | case MODE_SELECT_10: | |
2974 | size = (cdb[7] << 8) + cdb[8]; | |
2975 | cmd->se_cmd_flags |= SCF_SCSI_CONTROL_SG_IO_CDB; | |
2976 | break; | |
2977 | case MODE_SENSE: | |
2978 | size = cdb[4]; | |
05d1c7c0 | 2979 | cmd->se_cmd_flags |= SCF_SCSI_CONTROL_SG_IO_CDB; |
c66ac9db NB |
2980 | break; |
2981 | case MODE_SENSE_10: | |
2982 | case GPCMD_READ_BUFFER_CAPACITY: | |
2983 | case GPCMD_SEND_OPC: | |
2984 | case LOG_SELECT: | |
2985 | case LOG_SENSE: | |
2986 | size = (cdb[7] << 8) + cdb[8]; | |
05d1c7c0 | 2987 | cmd->se_cmd_flags |= SCF_SCSI_CONTROL_SG_IO_CDB; |
c66ac9db NB |
2988 | break; |
2989 | case READ_BLOCK_LIMITS: | |
2990 | size = READ_BLOCK_LEN; | |
05d1c7c0 | 2991 | cmd->se_cmd_flags |= SCF_SCSI_CONTROL_SG_IO_CDB; |
c66ac9db NB |
2992 | break; |
2993 | case GPCMD_GET_CONFIGURATION: | |
2994 | case GPCMD_READ_FORMAT_CAPACITIES: | |
2995 | case GPCMD_READ_DISC_INFO: | |
2996 | case GPCMD_READ_TRACK_RZONE_INFO: | |
2997 | size = (cdb[7] << 8) + cdb[8]; | |
2998 | cmd->se_cmd_flags |= SCF_SCSI_CONTROL_SG_IO_CDB; | |
2999 | break; | |
3000 | case PERSISTENT_RESERVE_IN: | |
3001 | case PERSISTENT_RESERVE_OUT: | |
3002 | cmd->transport_emulate_cdb = | |
e3d6f909 | 3003 | (su_dev->t10_pr.res_type == |
c66ac9db | 3004 | SPC3_PERSISTENT_RESERVATIONS) ? |
e3d6f909 | 3005 | core_scsi3_emulate_pr : NULL; |
c66ac9db | 3006 | size = (cdb[7] << 8) + cdb[8]; |
05d1c7c0 | 3007 | cmd->se_cmd_flags |= SCF_SCSI_CONTROL_SG_IO_CDB; |
c66ac9db NB |
3008 | break; |
3009 | case GPCMD_MECHANISM_STATUS: | |
3010 | case GPCMD_READ_DVD_STRUCTURE: | |
3011 | size = (cdb[8] << 8) + cdb[9]; | |
3012 | cmd->se_cmd_flags |= SCF_SCSI_CONTROL_SG_IO_CDB; | |
3013 | break; | |
3014 | case READ_POSITION: | |
3015 | size = READ_POSITION_LEN; | |
05d1c7c0 | 3016 | cmd->se_cmd_flags |= SCF_SCSI_CONTROL_SG_IO_CDB; |
c66ac9db | 3017 | break; |
e434f1f1 | 3018 | case MAINTENANCE_OUT: |
e3d6f909 | 3019 | if (dev->transport->get_device_type(dev) != TYPE_ROM) { |
c66ac9db NB |
3020 | /* MAINTENANCE_OUT from SCC-2 |
3021 | * | |
3022 | * Check for emulated MO_SET_TARGET_PGS. | |
3023 | */ | |
3024 | if (cdb[1] == MO_SET_TARGET_PGS) { | |
3025 | cmd->transport_emulate_cdb = | |
e3d6f909 | 3026 | (su_dev->t10_alua.alua_type == |
c66ac9db | 3027 | SPC3_ALUA_EMULATED) ? |
e3d6f909 | 3028 | core_emulate_set_target_port_groups : |
c66ac9db NB |
3029 | NULL; |
3030 | } | |
3031 | ||
3032 | size = (cdb[6] << 24) | (cdb[7] << 16) | | |
3033 | (cdb[8] << 8) | cdb[9]; | |
3034 | } else { | |
3035 | /* GPCMD_REPORT_KEY from multi media commands */ | |
3036 | size = (cdb[8] << 8) + cdb[9]; | |
3037 | } | |
05d1c7c0 | 3038 | cmd->se_cmd_flags |= SCF_SCSI_CONTROL_SG_IO_CDB; |
c66ac9db NB |
3039 | break; |
3040 | case INQUIRY: | |
3041 | size = (cdb[3] << 8) + cdb[4]; | |
3042 | /* | |
3043 | * Do implict HEAD_OF_QUEUE processing for INQUIRY. | |
3044 | * See spc4r17 section 5.3 | |
3045 | */ | |
5951146d | 3046 | if (cmd->se_dev->dev_task_attr_type == SAM_TASK_ATTR_EMULATED) |
e66ecd50 | 3047 | cmd->sam_task_attr = MSG_HEAD_TAG; |
05d1c7c0 | 3048 | cmd->se_cmd_flags |= SCF_SCSI_CONTROL_SG_IO_CDB; |
c66ac9db NB |
3049 | break; |
3050 | case READ_BUFFER: | |
3051 | size = (cdb[6] << 16) + (cdb[7] << 8) + cdb[8]; | |
05d1c7c0 | 3052 | cmd->se_cmd_flags |= SCF_SCSI_CONTROL_SG_IO_CDB; |
c66ac9db NB |
3053 | break; |
3054 | case READ_CAPACITY: | |
3055 | size = READ_CAP_LEN; | |
05d1c7c0 | 3056 | cmd->se_cmd_flags |= SCF_SCSI_CONTROL_SG_IO_CDB; |
c66ac9db NB |
3057 | break; |
3058 | case READ_MEDIA_SERIAL_NUMBER: | |
3059 | case SECURITY_PROTOCOL_IN: | |
3060 | case SECURITY_PROTOCOL_OUT: | |
3061 | size = (cdb[6] << 24) | (cdb[7] << 16) | (cdb[8] << 8) | cdb[9]; | |
05d1c7c0 | 3062 | cmd->se_cmd_flags |= SCF_SCSI_CONTROL_SG_IO_CDB; |
c66ac9db NB |
3063 | break; |
3064 | case SERVICE_ACTION_IN: | |
3065 | case ACCESS_CONTROL_IN: | |
3066 | case ACCESS_CONTROL_OUT: | |
3067 | case EXTENDED_COPY: | |
3068 | case READ_ATTRIBUTE: | |
3069 | case RECEIVE_COPY_RESULTS: | |
3070 | case WRITE_ATTRIBUTE: | |
3071 | size = (cdb[10] << 24) | (cdb[11] << 16) | | |
3072 | (cdb[12] << 8) | cdb[13]; | |
05d1c7c0 | 3073 | cmd->se_cmd_flags |= SCF_SCSI_CONTROL_SG_IO_CDB; |
c66ac9db NB |
3074 | break; |
3075 | case RECEIVE_DIAGNOSTIC: | |
3076 | case SEND_DIAGNOSTIC: | |
3077 | size = (cdb[3] << 8) | cdb[4]; | |
05d1c7c0 | 3078 | cmd->se_cmd_flags |= SCF_SCSI_CONTROL_SG_IO_CDB; |
c66ac9db NB |
3079 | break; |
3080 | /* #warning FIXME: Figure out correct GPCMD_READ_CD blocksize. */ | |
3081 | #if 0 | |
3082 | case GPCMD_READ_CD: | |
3083 | sectors = (cdb[6] << 16) + (cdb[7] << 8) + cdb[8]; | |
3084 | size = (2336 * sectors); | |
05d1c7c0 | 3085 | cmd->se_cmd_flags |= SCF_SCSI_CONTROL_SG_IO_CDB; |
c66ac9db NB |
3086 | break; |
3087 | #endif | |
3088 | case READ_TOC: | |
3089 | size = cdb[8]; | |
05d1c7c0 | 3090 | cmd->se_cmd_flags |= SCF_SCSI_CONTROL_SG_IO_CDB; |
c66ac9db NB |
3091 | break; |
3092 | case REQUEST_SENSE: | |
3093 | size = cdb[4]; | |
05d1c7c0 | 3094 | cmd->se_cmd_flags |= SCF_SCSI_CONTROL_SG_IO_CDB; |
c66ac9db NB |
3095 | break; |
3096 | case READ_ELEMENT_STATUS: | |
3097 | size = 65536 * cdb[7] + 256 * cdb[8] + cdb[9]; | |
05d1c7c0 | 3098 | cmd->se_cmd_flags |= SCF_SCSI_CONTROL_SG_IO_CDB; |
c66ac9db NB |
3099 | break; |
3100 | case WRITE_BUFFER: | |
3101 | size = (cdb[6] << 16) + (cdb[7] << 8) + cdb[8]; | |
05d1c7c0 | 3102 | cmd->se_cmd_flags |= SCF_SCSI_CONTROL_SG_IO_CDB; |
c66ac9db NB |
3103 | break; |
3104 | case RESERVE: | |
3105 | case RESERVE_10: | |
3106 | /* | |
3107 | * The SPC-2 RESERVE does not contain a size in the SCSI CDB. | |
3108 | * Assume the passthrough or $FABRIC_MOD will tell us about it. | |
3109 | */ | |
3110 | if (cdb[0] == RESERVE_10) | |
3111 | size = (cdb[7] << 8) | cdb[8]; | |
3112 | else | |
3113 | size = cmd->data_length; | |
3114 | ||
3115 | /* | |
3116 | * Setup the legacy emulated handler for SPC-2 and | |
3117 | * >= SPC-3 compatible reservation handling (CRH=1) | |
3118 | * Otherwise, we assume the underlying SCSI logic is | |
3119 | * is running in SPC_PASSTHROUGH, and wants reservations | |
3120 | * emulation disabled. | |
3121 | */ | |
3122 | cmd->transport_emulate_cdb = | |
e3d6f909 | 3123 | (su_dev->t10_pr.res_type != |
c66ac9db | 3124 | SPC_PASSTHROUGH) ? |
e3d6f909 | 3125 | core_scsi2_emulate_crh : NULL; |
c66ac9db NB |
3126 | cmd->se_cmd_flags |= SCF_SCSI_NON_DATA_CDB; |
3127 | break; | |
3128 | case RELEASE: | |
3129 | case RELEASE_10: | |
3130 | /* | |
3131 | * The SPC-2 RELEASE does not contain a size in the SCSI CDB. | |
3132 | * Assume the passthrough or $FABRIC_MOD will tell us about it. | |
3133 | */ | |
3134 | if (cdb[0] == RELEASE_10) | |
3135 | size = (cdb[7] << 8) | cdb[8]; | |
3136 | else | |
3137 | size = cmd->data_length; | |
3138 | ||
3139 | cmd->transport_emulate_cdb = | |
e3d6f909 | 3140 | (su_dev->t10_pr.res_type != |
c66ac9db | 3141 | SPC_PASSTHROUGH) ? |
e3d6f909 | 3142 | core_scsi2_emulate_crh : NULL; |
c66ac9db NB |
3143 | cmd->se_cmd_flags |= SCF_SCSI_NON_DATA_CDB; |
3144 | break; | |
3145 | case SYNCHRONIZE_CACHE: | |
3146 | case 0x91: /* SYNCHRONIZE_CACHE_16: */ | |
3147 | /* | |
3148 | * Extract LBA and range to be flushed for emulated SYNCHRONIZE_CACHE | |
3149 | */ | |
3150 | if (cdb[0] == SYNCHRONIZE_CACHE) { | |
3151 | sectors = transport_get_sectors_10(cdb, cmd, §or_ret); | |
a1d8b49a | 3152 | cmd->t_task_lba = transport_lba_32(cdb); |
c66ac9db NB |
3153 | } else { |
3154 | sectors = transport_get_sectors_16(cdb, cmd, §or_ret); | |
a1d8b49a | 3155 | cmd->t_task_lba = transport_lba_64(cdb); |
c66ac9db NB |
3156 | } |
3157 | if (sector_ret) | |
3158 | goto out_unsupported_cdb; | |
3159 | ||
3160 | size = transport_get_size(sectors, cdb, cmd); | |
3161 | cmd->se_cmd_flags |= SCF_SCSI_NON_DATA_CDB; | |
3162 | ||
3163 | /* | |
3164 | * For TCM/pSCSI passthrough, skip cmd->transport_emulate_cdb() | |
3165 | */ | |
e3d6f909 | 3166 | if (dev->transport->transport_type == TRANSPORT_PLUGIN_PHBA_PDEV) |
c66ac9db NB |
3167 | break; |
3168 | /* | |
3169 | * Set SCF_EMULATE_CDB_ASYNC to ensure asynchronous operation | |
3170 | * for SYNCHRONIZE_CACHE* Immed=1 case in __transport_execute_tasks() | |
3171 | */ | |
3172 | cmd->se_cmd_flags |= SCF_EMULATE_CDB_ASYNC; | |
3173 | /* | |
3174 | * Check to ensure that LBA + Range does not exceed past end of | |
7abbe7f3 | 3175 | * device for IBLOCK and FILEIO ->do_sync_cache() backend calls |
c66ac9db | 3176 | */ |
7abbe7f3 NB |
3177 | if ((cmd->t_task_lba != 0) || (sectors != 0)) { |
3178 | if (transport_cmd_get_valid_sectors(cmd) < 0) | |
3179 | goto out_invalid_cdb_field; | |
3180 | } | |
c66ac9db NB |
3181 | break; |
3182 | case UNMAP: | |
3183 | size = get_unaligned_be16(&cdb[7]); | |
05d1c7c0 | 3184 | cmd->se_cmd_flags |= SCF_SCSI_CONTROL_SG_IO_CDB; |
c66ac9db NB |
3185 | break; |
3186 | case WRITE_SAME_16: | |
3187 | sectors = transport_get_sectors_16(cdb, cmd, §or_ret); | |
3188 | if (sector_ret) | |
3189 | goto out_unsupported_cdb; | |
dd3a5ad8 | 3190 | |
6708bb27 | 3191 | if (sectors) |
12850626 | 3192 | size = transport_get_size(1, cdb, cmd); |
6708bb27 AG |
3193 | else { |
3194 | pr_err("WSNZ=1, WRITE_SAME w/sectors=0 not supported\n"); | |
3195 | goto out_invalid_cdb_field; | |
3196 | } | |
dd3a5ad8 | 3197 | |
5db0753b | 3198 | cmd->t_task_lba = get_unaligned_be64(&cdb[2]); |
706d5860 NB |
3199 | cmd->se_cmd_flags |= SCF_SCSI_CONTROL_SG_IO_CDB; |
3200 | ||
3201 | if (target_check_write_same_discard(&cdb[1], dev) < 0) | |
3202 | goto out_invalid_cdb_field; | |
3203 | break; | |
3204 | case WRITE_SAME: | |
3205 | sectors = transport_get_sectors_10(cdb, cmd, §or_ret); | |
3206 | if (sector_ret) | |
3207 | goto out_unsupported_cdb; | |
3208 | ||
3209 | if (sectors) | |
12850626 | 3210 | size = transport_get_size(1, cdb, cmd); |
706d5860 NB |
3211 | else { |
3212 | pr_err("WSNZ=1, WRITE_SAME w/sectors=0 not supported\n"); | |
3213 | goto out_invalid_cdb_field; | |
c66ac9db | 3214 | } |
706d5860 NB |
3215 | |
3216 | cmd->t_task_lba = get_unaligned_be32(&cdb[2]); | |
c66ac9db | 3217 | cmd->se_cmd_flags |= SCF_SCSI_CONTROL_SG_IO_CDB; |
706d5860 NB |
3218 | /* |
3219 | * Follow sbcr26 with WRITE_SAME (10) and check for the existence | |
3220 | * of byte 1 bit 3 UNMAP instead of original reserved field | |
3221 | */ | |
3222 | if (target_check_write_same_discard(&cdb[1], dev) < 0) | |
3223 | goto out_invalid_cdb_field; | |
c66ac9db NB |
3224 | break; |
3225 | case ALLOW_MEDIUM_REMOVAL: | |
3226 | case GPCMD_CLOSE_TRACK: | |
3227 | case ERASE: | |
3228 | case INITIALIZE_ELEMENT_STATUS: | |
3229 | case GPCMD_LOAD_UNLOAD: | |
3230 | case REZERO_UNIT: | |
3231 | case SEEK_10: | |
3232 | case GPCMD_SET_SPEED: | |
3233 | case SPACE: | |
3234 | case START_STOP: | |
3235 | case TEST_UNIT_READY: | |
3236 | case VERIFY: | |
3237 | case WRITE_FILEMARKS: | |
3238 | case MOVE_MEDIUM: | |
3239 | cmd->se_cmd_flags |= SCF_SCSI_NON_DATA_CDB; | |
3240 | break; | |
3241 | case REPORT_LUNS: | |
3242 | cmd->transport_emulate_cdb = | |
e3d6f909 | 3243 | transport_core_report_lun_response; |
c66ac9db NB |
3244 | size = (cdb[6] << 24) | (cdb[7] << 16) | (cdb[8] << 8) | cdb[9]; |
3245 | /* | |
3246 | * Do implict HEAD_OF_QUEUE processing for REPORT_LUNS | |
3247 | * See spc4r17 section 5.3 | |
3248 | */ | |
5951146d | 3249 | if (cmd->se_dev->dev_task_attr_type == SAM_TASK_ATTR_EMULATED) |
e66ecd50 | 3250 | cmd->sam_task_attr = MSG_HEAD_TAG; |
05d1c7c0 | 3251 | cmd->se_cmd_flags |= SCF_SCSI_CONTROL_SG_IO_CDB; |
c66ac9db NB |
3252 | break; |
3253 | default: | |
6708bb27 | 3254 | pr_warn("TARGET_CORE[%s]: Unsupported SCSI Opcode" |
c66ac9db | 3255 | " 0x%02x, sending CHECK_CONDITION.\n", |
e3d6f909 | 3256 | cmd->se_tfo->get_fabric_name(), cdb[0]); |
c66ac9db NB |
3257 | goto out_unsupported_cdb; |
3258 | } | |
3259 | ||
3260 | if (size != cmd->data_length) { | |
6708bb27 | 3261 | pr_warn("TARGET_CORE[%s]: Expected Transfer Length:" |
c66ac9db | 3262 | " %u does not match SCSI CDB Length: %u for SAM Opcode:" |
e3d6f909 | 3263 | " 0x%02x\n", cmd->se_tfo->get_fabric_name(), |
c66ac9db NB |
3264 | cmd->data_length, size, cdb[0]); |
3265 | ||
3266 | cmd->cmd_spdtl = size; | |
3267 | ||
3268 | if (cmd->data_direction == DMA_TO_DEVICE) { | |
6708bb27 | 3269 | pr_err("Rejecting underflow/overflow" |
c66ac9db NB |
3270 | " WRITE data\n"); |
3271 | goto out_invalid_cdb_field; | |
3272 | } | |
3273 | /* | |
3274 | * Reject READ_* or WRITE_* with overflow/underflow for | |
3275 | * type SCF_SCSI_DATA_SG_IO_CDB. | |
3276 | */ | |
6708bb27 AG |
3277 | if (!ret && (dev->se_sub_dev->se_dev_attrib.block_size != 512)) { |
3278 | pr_err("Failing OVERFLOW/UNDERFLOW for LBA op" | |
c66ac9db | 3279 | " CDB on non 512-byte sector setup subsystem" |
e3d6f909 | 3280 | " plugin: %s\n", dev->transport->name); |
c66ac9db NB |
3281 | /* Returns CHECK_CONDITION + INVALID_CDB_FIELD */ |
3282 | goto out_invalid_cdb_field; | |
3283 | } | |
3284 | ||
3285 | if (size > cmd->data_length) { | |
3286 | cmd->se_cmd_flags |= SCF_OVERFLOW_BIT; | |
3287 | cmd->residual_count = (size - cmd->data_length); | |
3288 | } else { | |
3289 | cmd->se_cmd_flags |= SCF_UNDERFLOW_BIT; | |
3290 | cmd->residual_count = (cmd->data_length - size); | |
3291 | } | |
3292 | cmd->data_length = size; | |
3293 | } | |
3294 | ||
d0229ae3 AG |
3295 | /* Let's limit control cdbs to a page, for simplicity's sake. */ |
3296 | if ((cmd->se_cmd_flags & SCF_SCSI_CONTROL_SG_IO_CDB) && | |
3297 | size > PAGE_SIZE) | |
3298 | goto out_invalid_cdb_field; | |
3299 | ||
c66ac9db NB |
3300 | transport_set_supported_SAM_opcode(cmd); |
3301 | return ret; | |
3302 | ||
3303 | out_unsupported_cdb: | |
3304 | cmd->se_cmd_flags |= SCF_SCSI_CDB_EXCEPTION; | |
3305 | cmd->scsi_sense_reason = TCM_UNSUPPORTED_SCSI_OPCODE; | |
5951146d | 3306 | return -EINVAL; |
c66ac9db NB |
3307 | out_invalid_cdb_field: |
3308 | cmd->se_cmd_flags |= SCF_SCSI_CDB_EXCEPTION; | |
3309 | cmd->scsi_sense_reason = TCM_INVALID_CDB_FIELD; | |
5951146d | 3310 | return -EINVAL; |
c66ac9db NB |
3311 | } |
3312 | ||
c66ac9db | 3313 | /* |
35e0e757 | 3314 | * Called from I/O completion to determine which dormant/delayed |
c66ac9db NB |
3315 | * and ordered cmds need to have their tasks added to the execution queue. |
3316 | */ | |
3317 | static void transport_complete_task_attr(struct se_cmd *cmd) | |
3318 | { | |
5951146d | 3319 | struct se_device *dev = cmd->se_dev; |
c66ac9db NB |
3320 | struct se_cmd *cmd_p, *cmd_tmp; |
3321 | int new_active_tasks = 0; | |
3322 | ||
e66ecd50 | 3323 | if (cmd->sam_task_attr == MSG_SIMPLE_TAG) { |
c66ac9db NB |
3324 | atomic_dec(&dev->simple_cmds); |
3325 | smp_mb__after_atomic_dec(); | |
3326 | dev->dev_cur_ordered_id++; | |
6708bb27 | 3327 | pr_debug("Incremented dev->dev_cur_ordered_id: %u for" |
c66ac9db NB |
3328 | " SIMPLE: %u\n", dev->dev_cur_ordered_id, |
3329 | cmd->se_ordered_id); | |
e66ecd50 | 3330 | } else if (cmd->sam_task_attr == MSG_HEAD_TAG) { |
c66ac9db NB |
3331 | atomic_dec(&dev->dev_hoq_count); |
3332 | smp_mb__after_atomic_dec(); | |
3333 | dev->dev_cur_ordered_id++; | |
6708bb27 | 3334 | pr_debug("Incremented dev_cur_ordered_id: %u for" |
c66ac9db NB |
3335 | " HEAD_OF_QUEUE: %u\n", dev->dev_cur_ordered_id, |
3336 | cmd->se_ordered_id); | |
e66ecd50 | 3337 | } else if (cmd->sam_task_attr == MSG_ORDERED_TAG) { |
c66ac9db | 3338 | spin_lock(&dev->ordered_cmd_lock); |
5951146d | 3339 | list_del(&cmd->se_ordered_node); |
c66ac9db NB |
3340 | atomic_dec(&dev->dev_ordered_sync); |
3341 | smp_mb__after_atomic_dec(); | |
3342 | spin_unlock(&dev->ordered_cmd_lock); | |
3343 | ||
3344 | dev->dev_cur_ordered_id++; | |
6708bb27 | 3345 | pr_debug("Incremented dev_cur_ordered_id: %u for ORDERED:" |
c66ac9db NB |
3346 | " %u\n", dev->dev_cur_ordered_id, cmd->se_ordered_id); |
3347 | } | |
3348 | /* | |
3349 | * Process all commands up to the last received | |
3350 | * ORDERED task attribute which requires another blocking | |
3351 | * boundary | |
3352 | */ | |
3353 | spin_lock(&dev->delayed_cmd_lock); | |
3354 | list_for_each_entry_safe(cmd_p, cmd_tmp, | |
5951146d | 3355 | &dev->delayed_cmd_list, se_delayed_node) { |
c66ac9db | 3356 | |
5951146d | 3357 | list_del(&cmd_p->se_delayed_node); |
c66ac9db NB |
3358 | spin_unlock(&dev->delayed_cmd_lock); |
3359 | ||
6708bb27 | 3360 | pr_debug("Calling add_tasks() for" |
c66ac9db NB |
3361 | " cmd_p: 0x%02x Task Attr: 0x%02x" |
3362 | " Dormant -> Active, se_ordered_id: %u\n", | |
6708bb27 | 3363 | cmd_p->t_task_cdb[0], |
c66ac9db NB |
3364 | cmd_p->sam_task_attr, cmd_p->se_ordered_id); |
3365 | ||
3366 | transport_add_tasks_from_cmd(cmd_p); | |
3367 | new_active_tasks++; | |
3368 | ||
3369 | spin_lock(&dev->delayed_cmd_lock); | |
e66ecd50 | 3370 | if (cmd_p->sam_task_attr == MSG_ORDERED_TAG) |
c66ac9db NB |
3371 | break; |
3372 | } | |
3373 | spin_unlock(&dev->delayed_cmd_lock); | |
3374 | /* | |
3375 | * If new tasks have become active, wake up the transport thread | |
3376 | * to do the processing of the Active tasks. | |
3377 | */ | |
3378 | if (new_active_tasks != 0) | |
e3d6f909 | 3379 | wake_up_interruptible(&dev->dev_queue_obj.thread_wq); |
c66ac9db NB |
3380 | } |
3381 | ||
e057f533 | 3382 | static void transport_complete_qf(struct se_cmd *cmd) |
07bde79a NB |
3383 | { |
3384 | int ret = 0; | |
3385 | ||
e057f533 CH |
3386 | if (cmd->se_dev->dev_task_attr_type == SAM_TASK_ATTR_EMULATED) |
3387 | transport_complete_task_attr(cmd); | |
3388 | ||
3389 | if (cmd->se_cmd_flags & SCF_TRANSPORT_TASK_SENSE) { | |
3390 | ret = cmd->se_tfo->queue_status(cmd); | |
3391 | if (ret) | |
3392 | goto out; | |
3393 | } | |
07bde79a NB |
3394 | |
3395 | switch (cmd->data_direction) { | |
3396 | case DMA_FROM_DEVICE: | |
3397 | ret = cmd->se_tfo->queue_data_in(cmd); | |
3398 | break; | |
3399 | case DMA_TO_DEVICE: | |
ec98f782 | 3400 | if (cmd->t_bidi_data_sg) { |
07bde79a NB |
3401 | ret = cmd->se_tfo->queue_data_in(cmd); |
3402 | if (ret < 0) | |
e057f533 | 3403 | break; |
07bde79a NB |
3404 | } |
3405 | /* Fall through for DMA_TO_DEVICE */ | |
3406 | case DMA_NONE: | |
3407 | ret = cmd->se_tfo->queue_status(cmd); | |
3408 | break; | |
3409 | default: | |
3410 | break; | |
3411 | } | |
3412 | ||
e057f533 CH |
3413 | out: |
3414 | if (ret < 0) { | |
3415 | transport_handle_queue_full(cmd, cmd->se_dev); | |
3416 | return; | |
3417 | } | |
3418 | transport_lun_remove_cmd(cmd); | |
3419 | transport_cmd_check_stop_to_fabric(cmd); | |
07bde79a NB |
3420 | } |
3421 | ||
3422 | static void transport_handle_queue_full( | |
3423 | struct se_cmd *cmd, | |
e057f533 | 3424 | struct se_device *dev) |
07bde79a NB |
3425 | { |
3426 | spin_lock_irq(&dev->qf_cmd_lock); | |
07bde79a NB |
3427 | list_add_tail(&cmd->se_qf_node, &cmd->se_dev->qf_cmd_list); |
3428 | atomic_inc(&dev->dev_qf_count); | |
3429 | smp_mb__after_atomic_inc(); | |
3430 | spin_unlock_irq(&cmd->se_dev->qf_cmd_lock); | |
3431 | ||
3432 | schedule_work(&cmd->se_dev->qf_work_queue); | |
3433 | } | |
3434 | ||
35e0e757 | 3435 | static void target_complete_ok_work(struct work_struct *work) |
c66ac9db | 3436 | { |
35e0e757 | 3437 | struct se_cmd *cmd = container_of(work, struct se_cmd, work); |
07bde79a | 3438 | int reason = 0, ret; |
35e0e757 | 3439 | |
c66ac9db NB |
3440 | /* |
3441 | * Check if we need to move delayed/dormant tasks from cmds on the | |
3442 | * delayed execution list after a HEAD_OF_QUEUE or ORDERED Task | |
3443 | * Attribute. | |
3444 | */ | |
5951146d | 3445 | if (cmd->se_dev->dev_task_attr_type == SAM_TASK_ATTR_EMULATED) |
c66ac9db | 3446 | transport_complete_task_attr(cmd); |
07bde79a NB |
3447 | /* |
3448 | * Check to schedule QUEUE_FULL work, or execute an existing | |
3449 | * cmd->transport_qf_callback() | |
3450 | */ | |
3451 | if (atomic_read(&cmd->se_dev->dev_qf_count) != 0) | |
3452 | schedule_work(&cmd->se_dev->qf_work_queue); | |
3453 | ||
c66ac9db NB |
3454 | /* |
3455 | * Check if we need to retrieve a sense buffer from | |
3456 | * the struct se_cmd in question. | |
3457 | */ | |
3458 | if (cmd->se_cmd_flags & SCF_TRANSPORT_TASK_SENSE) { | |
3459 | if (transport_get_sense_data(cmd) < 0) | |
3460 | reason = TCM_NON_EXISTENT_LUN; | |
3461 | ||
3462 | /* | |
3463 | * Only set when an struct se_task->task_scsi_status returned | |
3464 | * a non GOOD status. | |
3465 | */ | |
3466 | if (cmd->scsi_status) { | |
07bde79a | 3467 | ret = transport_send_check_condition_and_sense( |
c66ac9db | 3468 | cmd, reason, 1); |
07bde79a NB |
3469 | if (ret == -EAGAIN) |
3470 | goto queue_full; | |
3471 | ||
c66ac9db NB |
3472 | transport_lun_remove_cmd(cmd); |
3473 | transport_cmd_check_stop_to_fabric(cmd); | |
3474 | return; | |
3475 | } | |
3476 | } | |
3477 | /* | |
25985edc | 3478 | * Check for a callback, used by amongst other things |
c66ac9db NB |
3479 | * XDWRITE_READ_10 emulation. |
3480 | */ | |
3481 | if (cmd->transport_complete_callback) | |
3482 | cmd->transport_complete_callback(cmd); | |
3483 | ||
3484 | switch (cmd->data_direction) { | |
3485 | case DMA_FROM_DEVICE: | |
3486 | spin_lock(&cmd->se_lun->lun_sep_lock); | |
e3d6f909 AG |
3487 | if (cmd->se_lun->lun_sep) { |
3488 | cmd->se_lun->lun_sep->sep_stats.tx_data_octets += | |
c66ac9db NB |
3489 | cmd->data_length; |
3490 | } | |
3491 | spin_unlock(&cmd->se_lun->lun_sep_lock); | |
c66ac9db | 3492 | |
07bde79a NB |
3493 | ret = cmd->se_tfo->queue_data_in(cmd); |
3494 | if (ret == -EAGAIN) | |
3495 | goto queue_full; | |
c66ac9db NB |
3496 | break; |
3497 | case DMA_TO_DEVICE: | |
3498 | spin_lock(&cmd->se_lun->lun_sep_lock); | |
e3d6f909 AG |
3499 | if (cmd->se_lun->lun_sep) { |
3500 | cmd->se_lun->lun_sep->sep_stats.rx_data_octets += | |
c66ac9db NB |
3501 | cmd->data_length; |
3502 | } | |
3503 | spin_unlock(&cmd->se_lun->lun_sep_lock); | |
3504 | /* | |
3505 | * Check if we need to send READ payload for BIDI-COMMAND | |
3506 | */ | |
ec98f782 | 3507 | if (cmd->t_bidi_data_sg) { |
c66ac9db | 3508 | spin_lock(&cmd->se_lun->lun_sep_lock); |
e3d6f909 AG |
3509 | if (cmd->se_lun->lun_sep) { |
3510 | cmd->se_lun->lun_sep->sep_stats.tx_data_octets += | |
c66ac9db NB |
3511 | cmd->data_length; |
3512 | } | |
3513 | spin_unlock(&cmd->se_lun->lun_sep_lock); | |
07bde79a NB |
3514 | ret = cmd->se_tfo->queue_data_in(cmd); |
3515 | if (ret == -EAGAIN) | |
3516 | goto queue_full; | |
c66ac9db NB |
3517 | break; |
3518 | } | |
3519 | /* Fall through for DMA_TO_DEVICE */ | |
3520 | case DMA_NONE: | |
07bde79a NB |
3521 | ret = cmd->se_tfo->queue_status(cmd); |
3522 | if (ret == -EAGAIN) | |
3523 | goto queue_full; | |
c66ac9db NB |
3524 | break; |
3525 | default: | |
3526 | break; | |
3527 | } | |
3528 | ||
3529 | transport_lun_remove_cmd(cmd); | |
3530 | transport_cmd_check_stop_to_fabric(cmd); | |
07bde79a NB |
3531 | return; |
3532 | ||
3533 | queue_full: | |
6708bb27 | 3534 | pr_debug("Handling complete_ok QUEUE_FULL: se_cmd: %p," |
07bde79a | 3535 | " data_direction: %d\n", cmd, cmd->data_direction); |
e057f533 CH |
3536 | cmd->t_state = TRANSPORT_COMPLETE_QF_OK; |
3537 | transport_handle_queue_full(cmd, cmd->se_dev); | |
c66ac9db NB |
3538 | } |
3539 | ||
3540 | static void transport_free_dev_tasks(struct se_cmd *cmd) | |
3541 | { | |
3542 | struct se_task *task, *task_tmp; | |
3543 | unsigned long flags; | |
0c2cfe5f | 3544 | LIST_HEAD(dispose_list); |
c66ac9db | 3545 | |
a1d8b49a | 3546 | spin_lock_irqsave(&cmd->t_state_lock, flags); |
c66ac9db | 3547 | list_for_each_entry_safe(task, task_tmp, |
a1d8b49a | 3548 | &cmd->t_task_list, t_list) { |
0c2cfe5f CH |
3549 | if (!(task->task_flags & TF_ACTIVE)) |
3550 | list_move_tail(&task->t_list, &dispose_list); | |
3551 | } | |
3552 | spin_unlock_irqrestore(&cmd->t_state_lock, flags); | |
3553 | ||
3554 | while (!list_empty(&dispose_list)) { | |
3555 | task = list_first_entry(&dispose_list, struct se_task, t_list); | |
c66ac9db | 3556 | |
cc5d0f0f CH |
3557 | /* |
3558 | * We already cancelled all pending timers in | |
3559 | * transport_complete_task, but that was just a pure del_timer, | |
3560 | * so do a full del_timer_sync here to make sure any handler | |
3561 | * that was running at that point has finished execution. | |
3562 | */ | |
3563 | del_timer_sync(&task->task_timer); | |
3564 | ||
c66ac9db NB |
3565 | kfree(task->task_sg_bidi); |
3566 | kfree(task->task_sg); | |
3567 | ||
3568 | list_del(&task->t_list); | |
3569 | ||
42bf829e | 3570 | cmd->se_dev->transport->free_task(task); |
c66ac9db | 3571 | } |
c66ac9db NB |
3572 | } |
3573 | ||
6708bb27 | 3574 | static inline void transport_free_sgl(struct scatterlist *sgl, int nents) |
c66ac9db | 3575 | { |
ec98f782 | 3576 | struct scatterlist *sg; |
ec98f782 | 3577 | int count; |
c66ac9db | 3578 | |
6708bb27 AG |
3579 | for_each_sg(sgl, sg, nents, count) |
3580 | __free_page(sg_page(sg)); | |
c66ac9db | 3581 | |
6708bb27 AG |
3582 | kfree(sgl); |
3583 | } | |
c66ac9db | 3584 | |
6708bb27 AG |
3585 | static inline void transport_free_pages(struct se_cmd *cmd) |
3586 | { | |
3587 | if (cmd->se_cmd_flags & SCF_PASSTHROUGH_SG_TO_MEM_NOALLOC) | |
3588 | return; | |
3589 | ||
3590 | transport_free_sgl(cmd->t_data_sg, cmd->t_data_nents); | |
ec98f782 AG |
3591 | cmd->t_data_sg = NULL; |
3592 | cmd->t_data_nents = 0; | |
c66ac9db | 3593 | |
6708bb27 | 3594 | transport_free_sgl(cmd->t_bidi_data_sg, cmd->t_bidi_data_nents); |
ec98f782 AG |
3595 | cmd->t_bidi_data_sg = NULL; |
3596 | cmd->t_bidi_data_nents = 0; | |
c66ac9db NB |
3597 | } |
3598 | ||
d3df7825 CH |
3599 | /** |
3600 | * transport_put_cmd - release a reference to a command | |
3601 | * @cmd: command to release | |
3602 | * | |
3603 | * This routine releases our reference to the command and frees it if possible. | |
3604 | */ | |
39c05f32 | 3605 | static void transport_put_cmd(struct se_cmd *cmd) |
c66ac9db NB |
3606 | { |
3607 | unsigned long flags; | |
4911e3cc | 3608 | int free_tasks = 0; |
c66ac9db | 3609 | |
a1d8b49a | 3610 | spin_lock_irqsave(&cmd->t_state_lock, flags); |
4911e3cc CH |
3611 | if (atomic_read(&cmd->t_fe_count)) { |
3612 | if (!atomic_dec_and_test(&cmd->t_fe_count)) | |
3613 | goto out_busy; | |
3614 | } | |
3615 | ||
3616 | if (atomic_read(&cmd->t_se_count)) { | |
3617 | if (!atomic_dec_and_test(&cmd->t_se_count)) | |
3618 | goto out_busy; | |
3619 | } | |
3620 | ||
3621 | if (atomic_read(&cmd->transport_dev_active)) { | |
3622 | atomic_set(&cmd->transport_dev_active, 0); | |
3623 | transport_all_task_dev_remove_state(cmd); | |
3624 | free_tasks = 1; | |
c66ac9db | 3625 | } |
a1d8b49a | 3626 | spin_unlock_irqrestore(&cmd->t_state_lock, flags); |
c66ac9db | 3627 | |
4911e3cc CH |
3628 | if (free_tasks != 0) |
3629 | transport_free_dev_tasks(cmd); | |
d3df7825 | 3630 | |
c66ac9db | 3631 | transport_free_pages(cmd); |
31afc39c | 3632 | transport_release_cmd(cmd); |
39c05f32 | 3633 | return; |
4911e3cc CH |
3634 | out_busy: |
3635 | spin_unlock_irqrestore(&cmd->t_state_lock, flags); | |
c66ac9db NB |
3636 | } |
3637 | ||
c66ac9db | 3638 | /* |
ec98f782 AG |
3639 | * transport_generic_map_mem_to_cmd - Use fabric-alloced pages instead of |
3640 | * allocating in the core. | |
c66ac9db NB |
3641 | * @cmd: Associated se_cmd descriptor |
3642 | * @mem: SGL style memory for TCM WRITE / READ | |
3643 | * @sg_mem_num: Number of SGL elements | |
3644 | * @mem_bidi_in: SGL style memory for TCM BIDI READ | |
3645 | * @sg_mem_bidi_num: Number of BIDI READ SGL elements | |
3646 | * | |
3647 | * Return: nonzero return cmd was rejected for -ENOMEM or inproper usage | |
3648 | * of parameters. | |
3649 | */ | |
3650 | int transport_generic_map_mem_to_cmd( | |
3651 | struct se_cmd *cmd, | |
5951146d AG |
3652 | struct scatterlist *sgl, |
3653 | u32 sgl_count, | |
3654 | struct scatterlist *sgl_bidi, | |
3655 | u32 sgl_bidi_count) | |
c66ac9db | 3656 | { |
5951146d | 3657 | if (!sgl || !sgl_count) |
c66ac9db | 3658 | return 0; |
c66ac9db | 3659 | |
c66ac9db NB |
3660 | if ((cmd->se_cmd_flags & SCF_SCSI_DATA_SG_IO_CDB) || |
3661 | (cmd->se_cmd_flags & SCF_SCSI_CONTROL_SG_IO_CDB)) { | |
c66ac9db | 3662 | |
ec98f782 AG |
3663 | cmd->t_data_sg = sgl; |
3664 | cmd->t_data_nents = sgl_count; | |
c66ac9db | 3665 | |
ec98f782 AG |
3666 | if (sgl_bidi && sgl_bidi_count) { |
3667 | cmd->t_bidi_data_sg = sgl_bidi; | |
3668 | cmd->t_bidi_data_nents = sgl_bidi_count; | |
c66ac9db NB |
3669 | } |
3670 | cmd->se_cmd_flags |= SCF_PASSTHROUGH_SG_TO_MEM_NOALLOC; | |
c66ac9db NB |
3671 | } |
3672 | ||
3673 | return 0; | |
3674 | } | |
3675 | EXPORT_SYMBOL(transport_generic_map_mem_to_cmd); | |
3676 | ||
c66ac9db NB |
3677 | static int transport_new_cmd_obj(struct se_cmd *cmd) |
3678 | { | |
5951146d | 3679 | struct se_device *dev = cmd->se_dev; |
01cde4d5 | 3680 | int set_counts = 1, rc, task_cdbs; |
c66ac9db | 3681 | |
ec98f782 AG |
3682 | /* |
3683 | * Setup any BIDI READ tasks and memory from | |
3684 | * cmd->t_mem_bidi_list so the READ struct se_tasks | |
3685 | * are queued first for the non pSCSI passthrough case. | |
3686 | */ | |
3687 | if (cmd->t_bidi_data_sg && | |
3688 | (dev->transport->transport_type != TRANSPORT_PLUGIN_PHBA_PDEV)) { | |
3689 | rc = transport_allocate_tasks(cmd, | |
3690 | cmd->t_task_lba, | |
3691 | DMA_FROM_DEVICE, | |
3692 | cmd->t_bidi_data_sg, | |
3693 | cmd->t_bidi_data_nents); | |
6708bb27 | 3694 | if (rc <= 0) { |
c66ac9db NB |
3695 | cmd->se_cmd_flags |= SCF_SCSI_CDB_EXCEPTION; |
3696 | cmd->scsi_sense_reason = | |
ec98f782 | 3697 | TCM_LOGICAL_UNIT_COMMUNICATION_FAILURE; |
01cde4d5 | 3698 | return -EINVAL; |
c66ac9db | 3699 | } |
ec98f782 AG |
3700 | atomic_inc(&cmd->t_fe_count); |
3701 | atomic_inc(&cmd->t_se_count); | |
3702 | set_counts = 0; | |
3703 | } | |
3704 | /* | |
3705 | * Setup the tasks and memory from cmd->t_mem_list | |
3706 | * Note for BIDI transfers this will contain the WRITE payload | |
3707 | */ | |
3708 | task_cdbs = transport_allocate_tasks(cmd, | |
3709 | cmd->t_task_lba, | |
3710 | cmd->data_direction, | |
3711 | cmd->t_data_sg, | |
3712 | cmd->t_data_nents); | |
6708bb27 | 3713 | if (task_cdbs <= 0) { |
ec98f782 AG |
3714 | cmd->se_cmd_flags |= SCF_SCSI_CDB_EXCEPTION; |
3715 | cmd->scsi_sense_reason = | |
3716 | TCM_LOGICAL_UNIT_COMMUNICATION_FAILURE; | |
01cde4d5 | 3717 | return -EINVAL; |
ec98f782 | 3718 | } |
c66ac9db | 3719 | |
ec98f782 AG |
3720 | if (set_counts) { |
3721 | atomic_inc(&cmd->t_fe_count); | |
3722 | atomic_inc(&cmd->t_se_count); | |
c66ac9db NB |
3723 | } |
3724 | ||
ec98f782 AG |
3725 | cmd->t_task_list_num = task_cdbs; |
3726 | ||
a1d8b49a AG |
3727 | atomic_set(&cmd->t_task_cdbs_left, task_cdbs); |
3728 | atomic_set(&cmd->t_task_cdbs_ex_left, task_cdbs); | |
3729 | atomic_set(&cmd->t_task_cdbs_timeout_left, task_cdbs); | |
c66ac9db NB |
3730 | return 0; |
3731 | } | |
3732 | ||
05d1c7c0 AG |
3733 | void *transport_kmap_first_data_page(struct se_cmd *cmd) |
3734 | { | |
ec98f782 | 3735 | struct scatterlist *sg = cmd->t_data_sg; |
05d1c7c0 | 3736 | |
ec98f782 | 3737 | BUG_ON(!sg); |
05d1c7c0 | 3738 | /* |
ec98f782 AG |
3739 | * We need to take into account a possible offset here for fabrics like |
3740 | * tcm_loop who may be using a contig buffer from the SCSI midlayer for | |
3741 | * control CDBs passed as SGLs via transport_generic_map_mem_to_cmd() | |
05d1c7c0 | 3742 | */ |
ec98f782 | 3743 | return kmap(sg_page(sg)) + sg->offset; |
05d1c7c0 AG |
3744 | } |
3745 | EXPORT_SYMBOL(transport_kmap_first_data_page); | |
3746 | ||
3747 | void transport_kunmap_first_data_page(struct se_cmd *cmd) | |
3748 | { | |
ec98f782 | 3749 | kunmap(sg_page(cmd->t_data_sg)); |
05d1c7c0 AG |
3750 | } |
3751 | EXPORT_SYMBOL(transport_kunmap_first_data_page); | |
3752 | ||
c66ac9db | 3753 | static int |
05d1c7c0 | 3754 | transport_generic_get_mem(struct se_cmd *cmd) |
c66ac9db | 3755 | { |
ec98f782 AG |
3756 | u32 length = cmd->data_length; |
3757 | unsigned int nents; | |
3758 | struct page *page; | |
3759 | int i = 0; | |
c66ac9db | 3760 | |
ec98f782 AG |
3761 | nents = DIV_ROUND_UP(length, PAGE_SIZE); |
3762 | cmd->t_data_sg = kmalloc(sizeof(struct scatterlist) * nents, GFP_KERNEL); | |
3763 | if (!cmd->t_data_sg) | |
3764 | return -ENOMEM; | |
c66ac9db | 3765 | |
ec98f782 AG |
3766 | cmd->t_data_nents = nents; |
3767 | sg_init_table(cmd->t_data_sg, nents); | |
c66ac9db | 3768 | |
ec98f782 AG |
3769 | while (length) { |
3770 | u32 page_len = min_t(u32, length, PAGE_SIZE); | |
3771 | page = alloc_page(GFP_KERNEL | __GFP_ZERO); | |
3772 | if (!page) | |
3773 | goto out; | |
c66ac9db | 3774 | |
ec98f782 AG |
3775 | sg_set_page(&cmd->t_data_sg[i], page, page_len, 0); |
3776 | length -= page_len; | |
3777 | i++; | |
c66ac9db | 3778 | } |
c66ac9db | 3779 | return 0; |
c66ac9db | 3780 | |
ec98f782 AG |
3781 | out: |
3782 | while (i >= 0) { | |
3783 | __free_page(sg_page(&cmd->t_data_sg[i])); | |
3784 | i--; | |
c66ac9db | 3785 | } |
ec98f782 AG |
3786 | kfree(cmd->t_data_sg); |
3787 | cmd->t_data_sg = NULL; | |
3788 | return -ENOMEM; | |
c66ac9db NB |
3789 | } |
3790 | ||
a1d8b49a AG |
3791 | /* Reduce sectors if they are too long for the device */ |
3792 | static inline sector_t transport_limit_task_sectors( | |
c66ac9db NB |
3793 | struct se_device *dev, |
3794 | unsigned long long lba, | |
a1d8b49a | 3795 | sector_t sectors) |
c66ac9db | 3796 | { |
a1d8b49a | 3797 | sectors = min_t(sector_t, sectors, dev->se_sub_dev->se_dev_attrib.max_sectors); |
c66ac9db | 3798 | |
a1d8b49a AG |
3799 | if (dev->transport->get_device_type(dev) == TYPE_DISK) |
3800 | if ((lba + sectors) > transport_dev_end_lba(dev)) | |
3801 | sectors = ((transport_dev_end_lba(dev) - lba) + 1); | |
c66ac9db | 3802 | |
a1d8b49a | 3803 | return sectors; |
c66ac9db NB |
3804 | } |
3805 | ||
c66ac9db NB |
3806 | |
3807 | /* | |
3808 | * This function can be used by HW target mode drivers to create a linked | |
3809 | * scatterlist from all contiguously allocated struct se_task->task_sg[]. | |
3810 | * This is intended to be called during the completion path by TCM Core | |
3811 | * when struct target_core_fabric_ops->check_task_sg_chaining is enabled. | |
3812 | */ | |
3813 | void transport_do_task_sg_chain(struct se_cmd *cmd) | |
3814 | { | |
ec98f782 AG |
3815 | struct scatterlist *sg_first = NULL; |
3816 | struct scatterlist *sg_prev = NULL; | |
3817 | int sg_prev_nents = 0; | |
3818 | struct scatterlist *sg; | |
c66ac9db | 3819 | struct se_task *task; |
ec98f782 | 3820 | u32 chained_nents = 0; |
c66ac9db NB |
3821 | int i; |
3822 | ||
ec98f782 AG |
3823 | BUG_ON(!cmd->se_tfo->task_sg_chaining); |
3824 | ||
c66ac9db NB |
3825 | /* |
3826 | * Walk the struct se_task list and setup scatterlist chains | |
a1d8b49a | 3827 | * for each contiguously allocated struct se_task->task_sg[]. |
c66ac9db | 3828 | */ |
a1d8b49a | 3829 | list_for_each_entry(task, &cmd->t_task_list, t_list) { |
ec98f782 | 3830 | if (!task->task_sg) |
c66ac9db NB |
3831 | continue; |
3832 | ||
ec98f782 AG |
3833 | if (!sg_first) { |
3834 | sg_first = task->task_sg; | |
6708bb27 | 3835 | chained_nents = task->task_sg_nents; |
97868c89 | 3836 | } else { |
ec98f782 | 3837 | sg_chain(sg_prev, sg_prev_nents, task->task_sg); |
6708bb27 | 3838 | chained_nents += task->task_sg_nents; |
97868c89 | 3839 | } |
c3c74c7a NB |
3840 | /* |
3841 | * For the padded tasks, use the extra SGL vector allocated | |
3842 | * in transport_allocate_data_tasks() for the sg_prev_nents | |
04629b7b CH |
3843 | * offset into sg_chain() above. |
3844 | * | |
3845 | * We do not need the padding for the last task (or a single | |
3846 | * task), but in that case we will never use the sg_prev_nents | |
3847 | * value below which would be incorrect. | |
c3c74c7a | 3848 | */ |
04629b7b | 3849 | sg_prev_nents = (task->task_sg_nents + 1); |
ec98f782 | 3850 | sg_prev = task->task_sg; |
c66ac9db NB |
3851 | } |
3852 | /* | |
3853 | * Setup the starting pointer and total t_tasks_sg_linked_no including | |
3854 | * padding SGs for linking and to mark the end. | |
3855 | */ | |
a1d8b49a | 3856 | cmd->t_tasks_sg_chained = sg_first; |
ec98f782 | 3857 | cmd->t_tasks_sg_chained_no = chained_nents; |
c66ac9db | 3858 | |
6708bb27 | 3859 | pr_debug("Setup cmd: %p cmd->t_tasks_sg_chained: %p and" |
a1d8b49a AG |
3860 | " t_tasks_sg_chained_no: %u\n", cmd, cmd->t_tasks_sg_chained, |
3861 | cmd->t_tasks_sg_chained_no); | |
c66ac9db | 3862 | |
a1d8b49a AG |
3863 | for_each_sg(cmd->t_tasks_sg_chained, sg, |
3864 | cmd->t_tasks_sg_chained_no, i) { | |
c66ac9db | 3865 | |
6708bb27 | 3866 | pr_debug("SG[%d]: %p page: %p length: %d offset: %d\n", |
5951146d | 3867 | i, sg, sg_page(sg), sg->length, sg->offset); |
c66ac9db | 3868 | if (sg_is_chain(sg)) |
6708bb27 | 3869 | pr_debug("SG: %p sg_is_chain=1\n", sg); |
c66ac9db | 3870 | if (sg_is_last(sg)) |
6708bb27 | 3871 | pr_debug("SG: %p sg_is_last=1\n", sg); |
c66ac9db | 3872 | } |
c66ac9db NB |
3873 | } |
3874 | EXPORT_SYMBOL(transport_do_task_sg_chain); | |
3875 | ||
a1d8b49a AG |
3876 | /* |
3877 | * Break up cmd into chunks transport can handle | |
3878 | */ | |
ec98f782 | 3879 | static int transport_allocate_data_tasks( |
c66ac9db NB |
3880 | struct se_cmd *cmd, |
3881 | unsigned long long lba, | |
c66ac9db | 3882 | enum dma_data_direction data_direction, |
ec98f782 AG |
3883 | struct scatterlist *sgl, |
3884 | unsigned int sgl_nents) | |
c66ac9db | 3885 | { |
c66ac9db | 3886 | struct se_task *task; |
5951146d | 3887 | struct se_device *dev = cmd->se_dev; |
ec98f782 | 3888 | unsigned long flags; |
a3eedc22 | 3889 | int task_count, i; |
277c5f27 | 3890 | sector_t sectors, dev_max_sectors = dev->se_sub_dev->se_dev_attrib.max_sectors; |
ec98f782 AG |
3891 | u32 sector_size = dev->se_sub_dev->se_dev_attrib.block_size; |
3892 | struct scatterlist *sg; | |
3893 | struct scatterlist *cmd_sg; | |
a1d8b49a | 3894 | |
ec98f782 AG |
3895 | WARN_ON(cmd->data_length % sector_size); |
3896 | sectors = DIV_ROUND_UP(cmd->data_length, sector_size); | |
277c5f27 NB |
3897 | task_count = DIV_ROUND_UP_SECTOR_T(sectors, dev_max_sectors); |
3898 | ||
ec98f782 AG |
3899 | cmd_sg = sgl; |
3900 | for (i = 0; i < task_count; i++) { | |
c3c74c7a | 3901 | unsigned int task_size, task_sg_nents_padded; |
ec98f782 | 3902 | int count; |
a1d8b49a | 3903 | |
c66ac9db | 3904 | task = transport_generic_get_task(cmd, data_direction); |
a1d8b49a | 3905 | if (!task) |
ec98f782 | 3906 | return -ENOMEM; |
c66ac9db | 3907 | |
c66ac9db | 3908 | task->task_lba = lba; |
ec98f782 AG |
3909 | task->task_sectors = min(sectors, dev_max_sectors); |
3910 | task->task_size = task->task_sectors * sector_size; | |
c66ac9db | 3911 | |
525a48a2 NB |
3912 | /* |
3913 | * This now assumes that passed sg_ents are in PAGE_SIZE chunks | |
3914 | * in order to calculate the number per task SGL entries | |
3915 | */ | |
3916 | task->task_sg_nents = DIV_ROUND_UP(task->task_size, PAGE_SIZE); | |
c66ac9db | 3917 | /* |
ec98f782 AG |
3918 | * Check if the fabric module driver is requesting that all |
3919 | * struct se_task->task_sg[] be chained together.. If so, | |
3920 | * then allocate an extra padding SG entry for linking and | |
c3c74c7a NB |
3921 | * marking the end of the chained SGL for every task except |
3922 | * the last one for (task_count > 1) operation, or skipping | |
3923 | * the extra padding for the (task_count == 1) case. | |
c66ac9db | 3924 | */ |
c3c74c7a NB |
3925 | if (cmd->se_tfo->task_sg_chaining && (i < (task_count - 1))) { |
3926 | task_sg_nents_padded = (task->task_sg_nents + 1); | |
c3c74c7a NB |
3927 | } else |
3928 | task_sg_nents_padded = task->task_sg_nents; | |
c66ac9db | 3929 | |
1d20bb61 | 3930 | task->task_sg = kmalloc(sizeof(struct scatterlist) * |
c3c74c7a | 3931 | task_sg_nents_padded, GFP_KERNEL); |
ec98f782 AG |
3932 | if (!task->task_sg) { |
3933 | cmd->se_dev->transport->free_task(task); | |
3934 | return -ENOMEM; | |
3935 | } | |
3936 | ||
c3c74c7a | 3937 | sg_init_table(task->task_sg, task_sg_nents_padded); |
c66ac9db | 3938 | |
ec98f782 AG |
3939 | task_size = task->task_size; |
3940 | ||
3941 | /* Build new sgl, only up to task_size */ | |
6708bb27 | 3942 | for_each_sg(task->task_sg, sg, task->task_sg_nents, count) { |
ec98f782 AG |
3943 | if (cmd_sg->length > task_size) |
3944 | break; | |
3945 | ||
3946 | *sg = *cmd_sg; | |
3947 | task_size -= cmd_sg->length; | |
3948 | cmd_sg = sg_next(cmd_sg); | |
c66ac9db | 3949 | } |
c66ac9db | 3950 | |
ec98f782 AG |
3951 | lba += task->task_sectors; |
3952 | sectors -= task->task_sectors; | |
c66ac9db | 3953 | |
ec98f782 AG |
3954 | spin_lock_irqsave(&cmd->t_state_lock, flags); |
3955 | list_add_tail(&task->t_list, &cmd->t_task_list); | |
3956 | spin_unlock_irqrestore(&cmd->t_state_lock, flags); | |
c66ac9db NB |
3957 | } |
3958 | ||
ec98f782 | 3959 | return task_count; |
c66ac9db NB |
3960 | } |
3961 | ||
3962 | static int | |
ec98f782 | 3963 | transport_allocate_control_task(struct se_cmd *cmd) |
c66ac9db | 3964 | { |
c66ac9db | 3965 | struct se_task *task; |
ec98f782 | 3966 | unsigned long flags; |
c66ac9db NB |
3967 | |
3968 | task = transport_generic_get_task(cmd, cmd->data_direction); | |
3969 | if (!task) | |
ec98f782 | 3970 | return -ENOMEM; |
c66ac9db | 3971 | |
ec98f782 AG |
3972 | task->task_sg = kmalloc(sizeof(struct scatterlist) * cmd->t_data_nents, |
3973 | GFP_KERNEL); | |
3974 | if (!task->task_sg) { | |
3975 | cmd->se_dev->transport->free_task(task); | |
3976 | return -ENOMEM; | |
3977 | } | |
3978 | ||
3979 | memcpy(task->task_sg, cmd->t_data_sg, | |
3980 | sizeof(struct scatterlist) * cmd->t_data_nents); | |
c66ac9db | 3981 | task->task_size = cmd->data_length; |
6708bb27 | 3982 | task->task_sg_nents = cmd->t_data_nents; |
c66ac9db | 3983 | |
ec98f782 AG |
3984 | spin_lock_irqsave(&cmd->t_state_lock, flags); |
3985 | list_add_tail(&task->t_list, &cmd->t_task_list); | |
3986 | spin_unlock_irqrestore(&cmd->t_state_lock, flags); | |
c66ac9db | 3987 | |
6708bb27 | 3988 | /* Success! Return number of tasks allocated */ |
a3eedc22 | 3989 | return 1; |
ec98f782 AG |
3990 | } |
3991 | ||
3992 | static u32 transport_allocate_tasks( | |
3993 | struct se_cmd *cmd, | |
3994 | unsigned long long lba, | |
3995 | enum dma_data_direction data_direction, | |
3996 | struct scatterlist *sgl, | |
3997 | unsigned int sgl_nents) | |
3998 | { | |
01cde4d5 NB |
3999 | if (cmd->se_cmd_flags & SCF_SCSI_DATA_SG_IO_CDB) { |
4000 | if (transport_cmd_get_valid_sectors(cmd) < 0) | |
4001 | return -EINVAL; | |
4002 | ||
ec98f782 AG |
4003 | return transport_allocate_data_tasks(cmd, lba, data_direction, |
4004 | sgl, sgl_nents); | |
01cde4d5 | 4005 | } else |
6708bb27 AG |
4006 | return transport_allocate_control_task(cmd); |
4007 | ||
c66ac9db NB |
4008 | } |
4009 | ||
ec98f782 | 4010 | |
c66ac9db NB |
4011 | /* transport_generic_new_cmd(): Called from transport_processing_thread() |
4012 | * | |
4013 | * Allocate storage transport resources from a set of values predefined | |
4014 | * by transport_generic_cmd_sequencer() from the iSCSI Target RX process. | |
4015 | * Any non zero return here is treated as an "out of resource' op here. | |
4016 | */ | |
4017 | /* | |
4018 | * Generate struct se_task(s) and/or their payloads for this CDB. | |
4019 | */ | |
a1d8b49a | 4020 | int transport_generic_new_cmd(struct se_cmd *cmd) |
c66ac9db | 4021 | { |
c66ac9db NB |
4022 | int ret = 0; |
4023 | ||
4024 | /* | |
4025 | * Determine is the TCM fabric module has already allocated physical | |
4026 | * memory, and is directly calling transport_generic_map_mem_to_cmd() | |
ec98f782 | 4027 | * beforehand. |
c66ac9db | 4028 | */ |
ec98f782 AG |
4029 | if (!(cmd->se_cmd_flags & SCF_PASSTHROUGH_SG_TO_MEM_NOALLOC) && |
4030 | cmd->data_length) { | |
05d1c7c0 | 4031 | ret = transport_generic_get_mem(cmd); |
c66ac9db NB |
4032 | if (ret < 0) |
4033 | return ret; | |
4034 | } | |
1d20bb61 NB |
4035 | /* |
4036 | * Call transport_new_cmd_obj() to invoke transport_allocate_tasks() for | |
4037 | * control or data CDB types, and perform the map to backend subsystem | |
4038 | * code from SGL memory allocated here by transport_generic_get_mem(), or | |
4039 | * via pre-existing SGL memory setup explictly by fabric module code with | |
4040 | * transport_generic_map_mem_to_cmd(). | |
4041 | */ | |
c66ac9db NB |
4042 | ret = transport_new_cmd_obj(cmd); |
4043 | if (ret < 0) | |
4044 | return ret; | |
c66ac9db | 4045 | /* |
a1d8b49a | 4046 | * For WRITEs, let the fabric know its buffer is ready.. |
c66ac9db NB |
4047 | * This WRITE struct se_cmd (and all of its associated struct se_task's) |
4048 | * will be added to the struct se_device execution queue after its WRITE | |
4049 | * data has arrived. (ie: It gets handled by the transport processing | |
4050 | * thread a second time) | |
4051 | */ | |
4052 | if (cmd->data_direction == DMA_TO_DEVICE) { | |
4053 | transport_add_tasks_to_state_queue(cmd); | |
4054 | return transport_generic_write_pending(cmd); | |
4055 | } | |
4056 | /* | |
4057 | * Everything else but a WRITE, add the struct se_cmd's struct se_task's | |
4058 | * to the execution queue. | |
4059 | */ | |
4060 | transport_execute_tasks(cmd); | |
4061 | return 0; | |
4062 | } | |
a1d8b49a | 4063 | EXPORT_SYMBOL(transport_generic_new_cmd); |
c66ac9db NB |
4064 | |
4065 | /* transport_generic_process_write(): | |
4066 | * | |
4067 | * | |
4068 | */ | |
4069 | void transport_generic_process_write(struct se_cmd *cmd) | |
4070 | { | |
c66ac9db NB |
4071 | transport_execute_tasks(cmd); |
4072 | } | |
4073 | EXPORT_SYMBOL(transport_generic_process_write); | |
4074 | ||
e057f533 | 4075 | static void transport_write_pending_qf(struct se_cmd *cmd) |
07bde79a | 4076 | { |
e057f533 CH |
4077 | if (cmd->se_tfo->write_pending(cmd) == -EAGAIN) { |
4078 | pr_debug("Handling write_pending QUEUE__FULL: se_cmd: %p\n", | |
4079 | cmd); | |
4080 | transport_handle_queue_full(cmd, cmd->se_dev); | |
4081 | } | |
07bde79a NB |
4082 | } |
4083 | ||
c66ac9db NB |
4084 | static int transport_generic_write_pending(struct se_cmd *cmd) |
4085 | { | |
4086 | unsigned long flags; | |
4087 | int ret; | |
4088 | ||
a1d8b49a | 4089 | spin_lock_irqsave(&cmd->t_state_lock, flags); |
c66ac9db | 4090 | cmd->t_state = TRANSPORT_WRITE_PENDING; |
a1d8b49a | 4091 | spin_unlock_irqrestore(&cmd->t_state_lock, flags); |
07bde79a | 4092 | |
c66ac9db NB |
4093 | /* |
4094 | * Clear the se_cmd for WRITE_PENDING status in order to set | |
a1d8b49a | 4095 | * cmd->t_transport_active=0 so that transport_generic_handle_data |
c66ac9db | 4096 | * can be called from HW target mode interrupt code. This is safe |
e3d6f909 | 4097 | * to be called with transport_off=1 before the cmd->se_tfo->write_pending |
c66ac9db NB |
4098 | * because the se_cmd->se_lun pointer is not being cleared. |
4099 | */ | |
4100 | transport_cmd_check_stop(cmd, 1, 0); | |
4101 | ||
4102 | /* | |
4103 | * Call the fabric write_pending function here to let the | |
4104 | * frontend know that WRITE buffers are ready. | |
4105 | */ | |
e3d6f909 | 4106 | ret = cmd->se_tfo->write_pending(cmd); |
07bde79a NB |
4107 | if (ret == -EAGAIN) |
4108 | goto queue_full; | |
4109 | else if (ret < 0) | |
c66ac9db NB |
4110 | return ret; |
4111 | ||
4112 | return PYX_TRANSPORT_WRITE_PENDING; | |
07bde79a NB |
4113 | |
4114 | queue_full: | |
6708bb27 | 4115 | pr_debug("Handling write_pending QUEUE__FULL: se_cmd: %p\n", cmd); |
07bde79a | 4116 | cmd->t_state = TRANSPORT_COMPLETE_QF_WP; |
e057f533 | 4117 | transport_handle_queue_full(cmd, cmd->se_dev); |
07bde79a | 4118 | return ret; |
c66ac9db NB |
4119 | } |
4120 | ||
2dbc43d2 CH |
4121 | /** |
4122 | * transport_release_cmd - free a command | |
4123 | * @cmd: command to free | |
4124 | * | |
4125 | * This routine unconditionally frees a command, and reference counting | |
4126 | * or list removal must be done in the caller. | |
4127 | */ | |
35462975 | 4128 | void transport_release_cmd(struct se_cmd *cmd) |
c66ac9db | 4129 | { |
e3d6f909 | 4130 | BUG_ON(!cmd->se_tfo); |
c66ac9db | 4131 | |
2dbc43d2 CH |
4132 | if (cmd->se_tmr_req) |
4133 | core_tmr_release_req(cmd->se_tmr_req); | |
4134 | if (cmd->t_task_cdb != cmd->__t_task_cdb) | |
4135 | kfree(cmd->t_task_cdb); | |
35462975 | 4136 | cmd->se_tfo->release_cmd(cmd); |
c66ac9db | 4137 | } |
35462975 | 4138 | EXPORT_SYMBOL(transport_release_cmd); |
c66ac9db | 4139 | |
39c05f32 | 4140 | void transport_generic_free_cmd(struct se_cmd *cmd, int wait_for_tasks) |
c66ac9db | 4141 | { |
d14921d6 NB |
4142 | if (!(cmd->se_cmd_flags & SCF_SE_LUN_CMD)) { |
4143 | if (wait_for_tasks && cmd->se_tmr_req) | |
4144 | transport_wait_for_tasks(cmd); | |
4145 | ||
35462975 | 4146 | transport_release_cmd(cmd); |
d14921d6 NB |
4147 | } else { |
4148 | if (wait_for_tasks) | |
4149 | transport_wait_for_tasks(cmd); | |
4150 | ||
c66ac9db NB |
4151 | core_dec_lacl_count(cmd->se_sess->se_node_acl, cmd); |
4152 | ||
82f1c8a4 | 4153 | if (cmd->se_lun) |
c66ac9db | 4154 | transport_lun_remove_cmd(cmd); |
c66ac9db | 4155 | |
f4366772 NB |
4156 | transport_free_dev_tasks(cmd); |
4157 | ||
39c05f32 | 4158 | transport_put_cmd(cmd); |
c66ac9db NB |
4159 | } |
4160 | } | |
4161 | EXPORT_SYMBOL(transport_generic_free_cmd); | |
4162 | ||
c66ac9db NB |
4163 | /* transport_lun_wait_for_tasks(): |
4164 | * | |
4165 | * Called from ConfigFS context to stop the passed struct se_cmd to allow | |
4166 | * an struct se_lun to be successfully shutdown. | |
4167 | */ | |
4168 | static int transport_lun_wait_for_tasks(struct se_cmd *cmd, struct se_lun *lun) | |
4169 | { | |
4170 | unsigned long flags; | |
4171 | int ret; | |
4172 | /* | |
4173 | * If the frontend has already requested this struct se_cmd to | |
4174 | * be stopped, we can safely ignore this struct se_cmd. | |
4175 | */ | |
a1d8b49a AG |
4176 | spin_lock_irqsave(&cmd->t_state_lock, flags); |
4177 | if (atomic_read(&cmd->t_transport_stop)) { | |
4178 | atomic_set(&cmd->transport_lun_stop, 0); | |
6708bb27 | 4179 | pr_debug("ConfigFS ITT[0x%08x] - t_transport_stop ==" |
e3d6f909 | 4180 | " TRUE, skipping\n", cmd->se_tfo->get_task_tag(cmd)); |
a1d8b49a | 4181 | spin_unlock_irqrestore(&cmd->t_state_lock, flags); |
c66ac9db | 4182 | transport_cmd_check_stop(cmd, 1, 0); |
e3d6f909 | 4183 | return -EPERM; |
c66ac9db | 4184 | } |
a1d8b49a AG |
4185 | atomic_set(&cmd->transport_lun_fe_stop, 1); |
4186 | spin_unlock_irqrestore(&cmd->t_state_lock, flags); | |
c66ac9db | 4187 | |
5951146d | 4188 | wake_up_interruptible(&cmd->se_dev->dev_queue_obj.thread_wq); |
c66ac9db NB |
4189 | |
4190 | ret = transport_stop_tasks_for_cmd(cmd); | |
4191 | ||
6708bb27 AG |
4192 | pr_debug("ConfigFS: cmd: %p t_tasks: %d stop tasks ret:" |
4193 | " %d\n", cmd, cmd->t_task_list_num, ret); | |
c66ac9db | 4194 | if (!ret) { |
6708bb27 | 4195 | pr_debug("ConfigFS: ITT[0x%08x] - stopping cmd....\n", |
e3d6f909 | 4196 | cmd->se_tfo->get_task_tag(cmd)); |
a1d8b49a | 4197 | wait_for_completion(&cmd->transport_lun_stop_comp); |
6708bb27 | 4198 | pr_debug("ConfigFS: ITT[0x%08x] - stopped cmd....\n", |
e3d6f909 | 4199 | cmd->se_tfo->get_task_tag(cmd)); |
c66ac9db | 4200 | } |
3df8d40b | 4201 | transport_remove_cmd_from_queue(cmd); |
c66ac9db NB |
4202 | |
4203 | return 0; | |
4204 | } | |
4205 | ||
c66ac9db NB |
4206 | static void __transport_clear_lun_from_sessions(struct se_lun *lun) |
4207 | { | |
4208 | struct se_cmd *cmd = NULL; | |
4209 | unsigned long lun_flags, cmd_flags; | |
4210 | /* | |
4211 | * Do exception processing and return CHECK_CONDITION status to the | |
4212 | * Initiator Port. | |
4213 | */ | |
4214 | spin_lock_irqsave(&lun->lun_cmd_lock, lun_flags); | |
5951146d AG |
4215 | while (!list_empty(&lun->lun_cmd_list)) { |
4216 | cmd = list_first_entry(&lun->lun_cmd_list, | |
4217 | struct se_cmd, se_lun_node); | |
4218 | list_del(&cmd->se_lun_node); | |
4219 | ||
a1d8b49a | 4220 | atomic_set(&cmd->transport_lun_active, 0); |
c66ac9db NB |
4221 | /* |
4222 | * This will notify iscsi_target_transport.c: | |
4223 | * transport_cmd_check_stop() that a LUN shutdown is in | |
4224 | * progress for the iscsi_cmd_t. | |
4225 | */ | |
a1d8b49a | 4226 | spin_lock(&cmd->t_state_lock); |
6708bb27 | 4227 | pr_debug("SE_LUN[%d] - Setting cmd->transport" |
c66ac9db | 4228 | "_lun_stop for ITT: 0x%08x\n", |
e3d6f909 AG |
4229 | cmd->se_lun->unpacked_lun, |
4230 | cmd->se_tfo->get_task_tag(cmd)); | |
a1d8b49a AG |
4231 | atomic_set(&cmd->transport_lun_stop, 1); |
4232 | spin_unlock(&cmd->t_state_lock); | |
c66ac9db NB |
4233 | |
4234 | spin_unlock_irqrestore(&lun->lun_cmd_lock, lun_flags); | |
4235 | ||
6708bb27 AG |
4236 | if (!cmd->se_lun) { |
4237 | pr_err("ITT: 0x%08x, [i,t]_state: %u/%u\n", | |
e3d6f909 AG |
4238 | cmd->se_tfo->get_task_tag(cmd), |
4239 | cmd->se_tfo->get_cmd_state(cmd), cmd->t_state); | |
c66ac9db NB |
4240 | BUG(); |
4241 | } | |
4242 | /* | |
4243 | * If the Storage engine still owns the iscsi_cmd_t, determine | |
4244 | * and/or stop its context. | |
4245 | */ | |
6708bb27 | 4246 | pr_debug("SE_LUN[%d] - ITT: 0x%08x before transport" |
e3d6f909 AG |
4247 | "_lun_wait_for_tasks()\n", cmd->se_lun->unpacked_lun, |
4248 | cmd->se_tfo->get_task_tag(cmd)); | |
c66ac9db | 4249 | |
e3d6f909 | 4250 | if (transport_lun_wait_for_tasks(cmd, cmd->se_lun) < 0) { |
c66ac9db NB |
4251 | spin_lock_irqsave(&lun->lun_cmd_lock, lun_flags); |
4252 | continue; | |
4253 | } | |
4254 | ||
6708bb27 | 4255 | pr_debug("SE_LUN[%d] - ITT: 0x%08x after transport_lun" |
c66ac9db | 4256 | "_wait_for_tasks(): SUCCESS\n", |
e3d6f909 AG |
4257 | cmd->se_lun->unpacked_lun, |
4258 | cmd->se_tfo->get_task_tag(cmd)); | |
c66ac9db | 4259 | |
a1d8b49a | 4260 | spin_lock_irqsave(&cmd->t_state_lock, cmd_flags); |
6708bb27 | 4261 | if (!atomic_read(&cmd->transport_dev_active)) { |
a1d8b49a | 4262 | spin_unlock_irqrestore(&cmd->t_state_lock, cmd_flags); |
c66ac9db NB |
4263 | goto check_cond; |
4264 | } | |
a1d8b49a | 4265 | atomic_set(&cmd->transport_dev_active, 0); |
c66ac9db | 4266 | transport_all_task_dev_remove_state(cmd); |
a1d8b49a | 4267 | spin_unlock_irqrestore(&cmd->t_state_lock, cmd_flags); |
c66ac9db NB |
4268 | |
4269 | transport_free_dev_tasks(cmd); | |
4270 | /* | |
4271 | * The Storage engine stopped this struct se_cmd before it was | |
4272 | * send to the fabric frontend for delivery back to the | |
4273 | * Initiator Node. Return this SCSI CDB back with an | |
4274 | * CHECK_CONDITION status. | |
4275 | */ | |
4276 | check_cond: | |
4277 | transport_send_check_condition_and_sense(cmd, | |
4278 | TCM_NON_EXISTENT_LUN, 0); | |
4279 | /* | |
4280 | * If the fabric frontend is waiting for this iscsi_cmd_t to | |
4281 | * be released, notify the waiting thread now that LU has | |
4282 | * finished accessing it. | |
4283 | */ | |
a1d8b49a AG |
4284 | spin_lock_irqsave(&cmd->t_state_lock, cmd_flags); |
4285 | if (atomic_read(&cmd->transport_lun_fe_stop)) { | |
6708bb27 | 4286 | pr_debug("SE_LUN[%d] - Detected FE stop for" |
c66ac9db NB |
4287 | " struct se_cmd: %p ITT: 0x%08x\n", |
4288 | lun->unpacked_lun, | |
e3d6f909 | 4289 | cmd, cmd->se_tfo->get_task_tag(cmd)); |
c66ac9db | 4290 | |
a1d8b49a | 4291 | spin_unlock_irqrestore(&cmd->t_state_lock, |
c66ac9db NB |
4292 | cmd_flags); |
4293 | transport_cmd_check_stop(cmd, 1, 0); | |
a1d8b49a | 4294 | complete(&cmd->transport_lun_fe_stop_comp); |
c66ac9db NB |
4295 | spin_lock_irqsave(&lun->lun_cmd_lock, lun_flags); |
4296 | continue; | |
4297 | } | |
6708bb27 | 4298 | pr_debug("SE_LUN[%d] - ITT: 0x%08x finished processing\n", |
e3d6f909 | 4299 | lun->unpacked_lun, cmd->se_tfo->get_task_tag(cmd)); |
c66ac9db | 4300 | |
a1d8b49a | 4301 | spin_unlock_irqrestore(&cmd->t_state_lock, cmd_flags); |
c66ac9db NB |
4302 | spin_lock_irqsave(&lun->lun_cmd_lock, lun_flags); |
4303 | } | |
4304 | spin_unlock_irqrestore(&lun->lun_cmd_lock, lun_flags); | |
4305 | } | |
4306 | ||
4307 | static int transport_clear_lun_thread(void *p) | |
4308 | { | |
4309 | struct se_lun *lun = (struct se_lun *)p; | |
4310 | ||
4311 | __transport_clear_lun_from_sessions(lun); | |
4312 | complete(&lun->lun_shutdown_comp); | |
4313 | ||
4314 | return 0; | |
4315 | } | |
4316 | ||
4317 | int transport_clear_lun_from_sessions(struct se_lun *lun) | |
4318 | { | |
4319 | struct task_struct *kt; | |
4320 | ||
5951146d | 4321 | kt = kthread_run(transport_clear_lun_thread, lun, |
c66ac9db NB |
4322 | "tcm_cl_%u", lun->unpacked_lun); |
4323 | if (IS_ERR(kt)) { | |
6708bb27 | 4324 | pr_err("Unable to start clear_lun thread\n"); |
e3d6f909 | 4325 | return PTR_ERR(kt); |
c66ac9db NB |
4326 | } |
4327 | wait_for_completion(&lun->lun_shutdown_comp); | |
4328 | ||
4329 | return 0; | |
4330 | } | |
4331 | ||
d14921d6 NB |
4332 | /** |
4333 | * transport_wait_for_tasks - wait for completion to occur | |
4334 | * @cmd: command to wait | |
c66ac9db | 4335 | * |
d14921d6 NB |
4336 | * Called from frontend fabric context to wait for storage engine |
4337 | * to pause and/or release frontend generated struct se_cmd. | |
c66ac9db | 4338 | */ |
d14921d6 | 4339 | void transport_wait_for_tasks(struct se_cmd *cmd) |
c66ac9db NB |
4340 | { |
4341 | unsigned long flags; | |
4342 | ||
a1d8b49a | 4343 | spin_lock_irqsave(&cmd->t_state_lock, flags); |
d14921d6 NB |
4344 | if (!(cmd->se_cmd_flags & SCF_SE_LUN_CMD) && !(cmd->se_tmr_req)) { |
4345 | spin_unlock_irqrestore(&cmd->t_state_lock, flags); | |
4346 | return; | |
4347 | } | |
4348 | /* | |
4349 | * Only perform a possible wait_for_tasks if SCF_SUPPORTED_SAM_OPCODE | |
4350 | * has been set in transport_set_supported_SAM_opcode(). | |
4351 | */ | |
4352 | if (!(cmd->se_cmd_flags & SCF_SUPPORTED_SAM_OPCODE) && !cmd->se_tmr_req) { | |
4353 | spin_unlock_irqrestore(&cmd->t_state_lock, flags); | |
4354 | return; | |
4355 | } | |
c66ac9db NB |
4356 | /* |
4357 | * If we are already stopped due to an external event (ie: LUN shutdown) | |
4358 | * sleep until the connection can have the passed struct se_cmd back. | |
a1d8b49a | 4359 | * The cmd->transport_lun_stopped_sem will be upped by |
c66ac9db NB |
4360 | * transport_clear_lun_from_sessions() once the ConfigFS context caller |
4361 | * has completed its operation on the struct se_cmd. | |
4362 | */ | |
a1d8b49a | 4363 | if (atomic_read(&cmd->transport_lun_stop)) { |
c66ac9db | 4364 | |
6708bb27 | 4365 | pr_debug("wait_for_tasks: Stopping" |
e3d6f909 | 4366 | " wait_for_completion(&cmd->t_tasktransport_lun_fe" |
c66ac9db | 4367 | "_stop_comp); for ITT: 0x%08x\n", |
e3d6f909 | 4368 | cmd->se_tfo->get_task_tag(cmd)); |
c66ac9db NB |
4369 | /* |
4370 | * There is a special case for WRITES where a FE exception + | |
4371 | * LUN shutdown means ConfigFS context is still sleeping on | |
4372 | * transport_lun_stop_comp in transport_lun_wait_for_tasks(). | |
4373 | * We go ahead and up transport_lun_stop_comp just to be sure | |
4374 | * here. | |
4375 | */ | |
a1d8b49a AG |
4376 | spin_unlock_irqrestore(&cmd->t_state_lock, flags); |
4377 | complete(&cmd->transport_lun_stop_comp); | |
4378 | wait_for_completion(&cmd->transport_lun_fe_stop_comp); | |
4379 | spin_lock_irqsave(&cmd->t_state_lock, flags); | |
c66ac9db NB |
4380 | |
4381 | transport_all_task_dev_remove_state(cmd); | |
4382 | /* | |
4383 | * At this point, the frontend who was the originator of this | |
4384 | * struct se_cmd, now owns the structure and can be released through | |
4385 | * normal means below. | |
4386 | */ | |
6708bb27 | 4387 | pr_debug("wait_for_tasks: Stopped" |
e3d6f909 | 4388 | " wait_for_completion(&cmd->t_tasktransport_lun_fe_" |
c66ac9db | 4389 | "stop_comp); for ITT: 0x%08x\n", |
e3d6f909 | 4390 | cmd->se_tfo->get_task_tag(cmd)); |
c66ac9db | 4391 | |
a1d8b49a | 4392 | atomic_set(&cmd->transport_lun_stop, 0); |
c66ac9db | 4393 | } |
a1d8b49a | 4394 | if (!atomic_read(&cmd->t_transport_active) || |
d14921d6 NB |
4395 | atomic_read(&cmd->t_transport_aborted)) { |
4396 | spin_unlock_irqrestore(&cmd->t_state_lock, flags); | |
4397 | return; | |
4398 | } | |
c66ac9db | 4399 | |
a1d8b49a | 4400 | atomic_set(&cmd->t_transport_stop, 1); |
c66ac9db | 4401 | |
6708bb27 | 4402 | pr_debug("wait_for_tasks: Stopping %p ITT: 0x%08x" |
f2da9dbd CH |
4403 | " i_state: %d, t_state: %d, t_transport_stop = TRUE\n", |
4404 | cmd, cmd->se_tfo->get_task_tag(cmd), | |
4405 | cmd->se_tfo->get_cmd_state(cmd), cmd->t_state); | |
c66ac9db | 4406 | |
a1d8b49a | 4407 | spin_unlock_irqrestore(&cmd->t_state_lock, flags); |
c66ac9db | 4408 | |
5951146d | 4409 | wake_up_interruptible(&cmd->se_dev->dev_queue_obj.thread_wq); |
c66ac9db | 4410 | |
a1d8b49a | 4411 | wait_for_completion(&cmd->t_transport_stop_comp); |
c66ac9db | 4412 | |
a1d8b49a AG |
4413 | spin_lock_irqsave(&cmd->t_state_lock, flags); |
4414 | atomic_set(&cmd->t_transport_active, 0); | |
4415 | atomic_set(&cmd->t_transport_stop, 0); | |
c66ac9db | 4416 | |
6708bb27 | 4417 | pr_debug("wait_for_tasks: Stopped wait_for_compltion(" |
a1d8b49a | 4418 | "&cmd->t_transport_stop_comp) for ITT: 0x%08x\n", |
e3d6f909 | 4419 | cmd->se_tfo->get_task_tag(cmd)); |
c66ac9db | 4420 | |
d14921d6 | 4421 | spin_unlock_irqrestore(&cmd->t_state_lock, flags); |
c66ac9db | 4422 | } |
d14921d6 | 4423 | EXPORT_SYMBOL(transport_wait_for_tasks); |
c66ac9db NB |
4424 | |
4425 | static int transport_get_sense_codes( | |
4426 | struct se_cmd *cmd, | |
4427 | u8 *asc, | |
4428 | u8 *ascq) | |
4429 | { | |
4430 | *asc = cmd->scsi_asc; | |
4431 | *ascq = cmd->scsi_ascq; | |
4432 | ||
4433 | return 0; | |
4434 | } | |
4435 | ||
4436 | static int transport_set_sense_codes( | |
4437 | struct se_cmd *cmd, | |
4438 | u8 asc, | |
4439 | u8 ascq) | |
4440 | { | |
4441 | cmd->scsi_asc = asc; | |
4442 | cmd->scsi_ascq = ascq; | |
4443 | ||
4444 | return 0; | |
4445 | } | |
4446 | ||
4447 | int transport_send_check_condition_and_sense( | |
4448 | struct se_cmd *cmd, | |
4449 | u8 reason, | |
4450 | int from_transport) | |
4451 | { | |
4452 | unsigned char *buffer = cmd->sense_buffer; | |
4453 | unsigned long flags; | |
4454 | int offset; | |
4455 | u8 asc = 0, ascq = 0; | |
4456 | ||
a1d8b49a | 4457 | spin_lock_irqsave(&cmd->t_state_lock, flags); |
c66ac9db | 4458 | if (cmd->se_cmd_flags & SCF_SENT_CHECK_CONDITION) { |
a1d8b49a | 4459 | spin_unlock_irqrestore(&cmd->t_state_lock, flags); |
c66ac9db NB |
4460 | return 0; |
4461 | } | |
4462 | cmd->se_cmd_flags |= SCF_SENT_CHECK_CONDITION; | |
a1d8b49a | 4463 | spin_unlock_irqrestore(&cmd->t_state_lock, flags); |
c66ac9db NB |
4464 | |
4465 | if (!reason && from_transport) | |
4466 | goto after_reason; | |
4467 | ||
4468 | if (!from_transport) | |
4469 | cmd->se_cmd_flags |= SCF_EMULATED_TASK_SENSE; | |
4470 | /* | |
4471 | * Data Segment and SenseLength of the fabric response PDU. | |
4472 | * | |
4473 | * TRANSPORT_SENSE_BUFFER is now set to SCSI_SENSE_BUFFERSIZE | |
4474 | * from include/scsi/scsi_cmnd.h | |
4475 | */ | |
e3d6f909 | 4476 | offset = cmd->se_tfo->set_fabric_sense_len(cmd, |
c66ac9db NB |
4477 | TRANSPORT_SENSE_BUFFER); |
4478 | /* | |
4479 | * Actual SENSE DATA, see SPC-3 7.23.2 SPC_SENSE_KEY_OFFSET uses | |
4480 | * SENSE KEY values from include/scsi/scsi.h | |
4481 | */ | |
4482 | switch (reason) { | |
4483 | case TCM_NON_EXISTENT_LUN: | |
eb39d340 NB |
4484 | /* CURRENT ERROR */ |
4485 | buffer[offset] = 0x70; | |
4486 | /* ILLEGAL REQUEST */ | |
4487 | buffer[offset+SPC_SENSE_KEY_OFFSET] = ILLEGAL_REQUEST; | |
4488 | /* LOGICAL UNIT NOT SUPPORTED */ | |
4489 | buffer[offset+SPC_ASC_KEY_OFFSET] = 0x25; | |
4490 | break; | |
c66ac9db NB |
4491 | case TCM_UNSUPPORTED_SCSI_OPCODE: |
4492 | case TCM_SECTOR_COUNT_TOO_MANY: | |
4493 | /* CURRENT ERROR */ | |
4494 | buffer[offset] = 0x70; | |
4495 | /* ILLEGAL REQUEST */ | |
4496 | buffer[offset+SPC_SENSE_KEY_OFFSET] = ILLEGAL_REQUEST; | |
4497 | /* INVALID COMMAND OPERATION CODE */ | |
4498 | buffer[offset+SPC_ASC_KEY_OFFSET] = 0x20; | |
4499 | break; | |
4500 | case TCM_UNKNOWN_MODE_PAGE: | |
4501 | /* CURRENT ERROR */ | |
4502 | buffer[offset] = 0x70; | |
4503 | /* ILLEGAL REQUEST */ | |
4504 | buffer[offset+SPC_SENSE_KEY_OFFSET] = ILLEGAL_REQUEST; | |
4505 | /* INVALID FIELD IN CDB */ | |
4506 | buffer[offset+SPC_ASC_KEY_OFFSET] = 0x24; | |
4507 | break; | |
4508 | case TCM_CHECK_CONDITION_ABORT_CMD: | |
4509 | /* CURRENT ERROR */ | |
4510 | buffer[offset] = 0x70; | |
4511 | /* ABORTED COMMAND */ | |
4512 | buffer[offset+SPC_SENSE_KEY_OFFSET] = ABORTED_COMMAND; | |
4513 | /* BUS DEVICE RESET FUNCTION OCCURRED */ | |
4514 | buffer[offset+SPC_ASC_KEY_OFFSET] = 0x29; | |
4515 | buffer[offset+SPC_ASCQ_KEY_OFFSET] = 0x03; | |
4516 | break; | |
4517 | case TCM_INCORRECT_AMOUNT_OF_DATA: | |
4518 | /* CURRENT ERROR */ | |
4519 | buffer[offset] = 0x70; | |
4520 | /* ABORTED COMMAND */ | |
4521 | buffer[offset+SPC_SENSE_KEY_OFFSET] = ABORTED_COMMAND; | |
4522 | /* WRITE ERROR */ | |
4523 | buffer[offset+SPC_ASC_KEY_OFFSET] = 0x0c; | |
4524 | /* NOT ENOUGH UNSOLICITED DATA */ | |
4525 | buffer[offset+SPC_ASCQ_KEY_OFFSET] = 0x0d; | |
4526 | break; | |
4527 | case TCM_INVALID_CDB_FIELD: | |
4528 | /* CURRENT ERROR */ | |
4529 | buffer[offset] = 0x70; | |
4530 | /* ABORTED COMMAND */ | |
4531 | buffer[offset+SPC_SENSE_KEY_OFFSET] = ABORTED_COMMAND; | |
4532 | /* INVALID FIELD IN CDB */ | |
4533 | buffer[offset+SPC_ASC_KEY_OFFSET] = 0x24; | |
4534 | break; | |
4535 | case TCM_INVALID_PARAMETER_LIST: | |
4536 | /* CURRENT ERROR */ | |
4537 | buffer[offset] = 0x70; | |
4538 | /* ABORTED COMMAND */ | |
4539 | buffer[offset+SPC_SENSE_KEY_OFFSET] = ABORTED_COMMAND; | |
4540 | /* INVALID FIELD IN PARAMETER LIST */ | |
4541 | buffer[offset+SPC_ASC_KEY_OFFSET] = 0x26; | |
4542 | break; | |
4543 | case TCM_UNEXPECTED_UNSOLICITED_DATA: | |
4544 | /* CURRENT ERROR */ | |
4545 | buffer[offset] = 0x70; | |
4546 | /* ABORTED COMMAND */ | |
4547 | buffer[offset+SPC_SENSE_KEY_OFFSET] = ABORTED_COMMAND; | |
4548 | /* WRITE ERROR */ | |
4549 | buffer[offset+SPC_ASC_KEY_OFFSET] = 0x0c; | |
4550 | /* UNEXPECTED_UNSOLICITED_DATA */ | |
4551 | buffer[offset+SPC_ASCQ_KEY_OFFSET] = 0x0c; | |
4552 | break; | |
4553 | case TCM_SERVICE_CRC_ERROR: | |
4554 | /* CURRENT ERROR */ | |
4555 | buffer[offset] = 0x70; | |
4556 | /* ABORTED COMMAND */ | |
4557 | buffer[offset+SPC_SENSE_KEY_OFFSET] = ABORTED_COMMAND; | |
4558 | /* PROTOCOL SERVICE CRC ERROR */ | |
4559 | buffer[offset+SPC_ASC_KEY_OFFSET] = 0x47; | |
4560 | /* N/A */ | |
4561 | buffer[offset+SPC_ASCQ_KEY_OFFSET] = 0x05; | |
4562 | break; | |
4563 | case TCM_SNACK_REJECTED: | |
4564 | /* CURRENT ERROR */ | |
4565 | buffer[offset] = 0x70; | |
4566 | /* ABORTED COMMAND */ | |
4567 | buffer[offset+SPC_SENSE_KEY_OFFSET] = ABORTED_COMMAND; | |
4568 | /* READ ERROR */ | |
4569 | buffer[offset+SPC_ASC_KEY_OFFSET] = 0x11; | |
4570 | /* FAILED RETRANSMISSION REQUEST */ | |
4571 | buffer[offset+SPC_ASCQ_KEY_OFFSET] = 0x13; | |
4572 | break; | |
4573 | case TCM_WRITE_PROTECTED: | |
4574 | /* CURRENT ERROR */ | |
4575 | buffer[offset] = 0x70; | |
4576 | /* DATA PROTECT */ | |
4577 | buffer[offset+SPC_SENSE_KEY_OFFSET] = DATA_PROTECT; | |
4578 | /* WRITE PROTECTED */ | |
4579 | buffer[offset+SPC_ASC_KEY_OFFSET] = 0x27; | |
4580 | break; | |
4581 | case TCM_CHECK_CONDITION_UNIT_ATTENTION: | |
4582 | /* CURRENT ERROR */ | |
4583 | buffer[offset] = 0x70; | |
4584 | /* UNIT ATTENTION */ | |
4585 | buffer[offset+SPC_SENSE_KEY_OFFSET] = UNIT_ATTENTION; | |
4586 | core_scsi3_ua_for_check_condition(cmd, &asc, &ascq); | |
4587 | buffer[offset+SPC_ASC_KEY_OFFSET] = asc; | |
4588 | buffer[offset+SPC_ASCQ_KEY_OFFSET] = ascq; | |
4589 | break; | |
4590 | case TCM_CHECK_CONDITION_NOT_READY: | |
4591 | /* CURRENT ERROR */ | |
4592 | buffer[offset] = 0x70; | |
4593 | /* Not Ready */ | |
4594 | buffer[offset+SPC_SENSE_KEY_OFFSET] = NOT_READY; | |
4595 | transport_get_sense_codes(cmd, &asc, &ascq); | |
4596 | buffer[offset+SPC_ASC_KEY_OFFSET] = asc; | |
4597 | buffer[offset+SPC_ASCQ_KEY_OFFSET] = ascq; | |
4598 | break; | |
4599 | case TCM_LOGICAL_UNIT_COMMUNICATION_FAILURE: | |
4600 | default: | |
4601 | /* CURRENT ERROR */ | |
4602 | buffer[offset] = 0x70; | |
4603 | /* ILLEGAL REQUEST */ | |
4604 | buffer[offset+SPC_SENSE_KEY_OFFSET] = ILLEGAL_REQUEST; | |
4605 | /* LOGICAL UNIT COMMUNICATION FAILURE */ | |
4606 | buffer[offset+SPC_ASC_KEY_OFFSET] = 0x80; | |
4607 | break; | |
4608 | } | |
4609 | /* | |
4610 | * This code uses linux/include/scsi/scsi.h SAM status codes! | |
4611 | */ | |
4612 | cmd->scsi_status = SAM_STAT_CHECK_CONDITION; | |
4613 | /* | |
4614 | * Automatically padded, this value is encoded in the fabric's | |
4615 | * data_length response PDU containing the SCSI defined sense data. | |
4616 | */ | |
4617 | cmd->scsi_sense_length = TRANSPORT_SENSE_BUFFER + offset; | |
4618 | ||
4619 | after_reason: | |
07bde79a | 4620 | return cmd->se_tfo->queue_status(cmd); |
c66ac9db NB |
4621 | } |
4622 | EXPORT_SYMBOL(transport_send_check_condition_and_sense); | |
4623 | ||
4624 | int transport_check_aborted_status(struct se_cmd *cmd, int send_status) | |
4625 | { | |
4626 | int ret = 0; | |
4627 | ||
a1d8b49a | 4628 | if (atomic_read(&cmd->t_transport_aborted) != 0) { |
6708bb27 | 4629 | if (!send_status || |
c66ac9db NB |
4630 | (cmd->se_cmd_flags & SCF_SENT_DELAYED_TAS)) |
4631 | return 1; | |
4632 | #if 0 | |
6708bb27 | 4633 | pr_debug("Sending delayed SAM_STAT_TASK_ABORTED" |
c66ac9db | 4634 | " status for CDB: 0x%02x ITT: 0x%08x\n", |
a1d8b49a | 4635 | cmd->t_task_cdb[0], |
e3d6f909 | 4636 | cmd->se_tfo->get_task_tag(cmd)); |
c66ac9db NB |
4637 | #endif |
4638 | cmd->se_cmd_flags |= SCF_SENT_DELAYED_TAS; | |
e3d6f909 | 4639 | cmd->se_tfo->queue_status(cmd); |
c66ac9db NB |
4640 | ret = 1; |
4641 | } | |
4642 | return ret; | |
4643 | } | |
4644 | EXPORT_SYMBOL(transport_check_aborted_status); | |
4645 | ||
4646 | void transport_send_task_abort(struct se_cmd *cmd) | |
4647 | { | |
c252f003 NB |
4648 | unsigned long flags; |
4649 | ||
4650 | spin_lock_irqsave(&cmd->t_state_lock, flags); | |
4651 | if (cmd->se_cmd_flags & SCF_SENT_CHECK_CONDITION) { | |
4652 | spin_unlock_irqrestore(&cmd->t_state_lock, flags); | |
4653 | return; | |
4654 | } | |
4655 | spin_unlock_irqrestore(&cmd->t_state_lock, flags); | |
4656 | ||
c66ac9db NB |
4657 | /* |
4658 | * If there are still expected incoming fabric WRITEs, we wait | |
4659 | * until until they have completed before sending a TASK_ABORTED | |
4660 | * response. This response with TASK_ABORTED status will be | |
4661 | * queued back to fabric module by transport_check_aborted_status(). | |
4662 | */ | |
4663 | if (cmd->data_direction == DMA_TO_DEVICE) { | |
e3d6f909 | 4664 | if (cmd->se_tfo->write_pending_status(cmd) != 0) { |
a1d8b49a | 4665 | atomic_inc(&cmd->t_transport_aborted); |
c66ac9db NB |
4666 | smp_mb__after_atomic_inc(); |
4667 | cmd->scsi_status = SAM_STAT_TASK_ABORTED; | |
4668 | transport_new_cmd_failure(cmd); | |
4669 | return; | |
4670 | } | |
4671 | } | |
4672 | cmd->scsi_status = SAM_STAT_TASK_ABORTED; | |
4673 | #if 0 | |
6708bb27 | 4674 | pr_debug("Setting SAM_STAT_TASK_ABORTED status for CDB: 0x%02x," |
a1d8b49a | 4675 | " ITT: 0x%08x\n", cmd->t_task_cdb[0], |
e3d6f909 | 4676 | cmd->se_tfo->get_task_tag(cmd)); |
c66ac9db | 4677 | #endif |
e3d6f909 | 4678 | cmd->se_tfo->queue_status(cmd); |
c66ac9db NB |
4679 | } |
4680 | ||
4681 | /* transport_generic_do_tmr(): | |
4682 | * | |
4683 | * | |
4684 | */ | |
4685 | int transport_generic_do_tmr(struct se_cmd *cmd) | |
4686 | { | |
5951146d | 4687 | struct se_device *dev = cmd->se_dev; |
c66ac9db NB |
4688 | struct se_tmr_req *tmr = cmd->se_tmr_req; |
4689 | int ret; | |
4690 | ||
4691 | switch (tmr->function) { | |
5c6cd613 | 4692 | case TMR_ABORT_TASK: |
c66ac9db NB |
4693 | tmr->response = TMR_FUNCTION_REJECTED; |
4694 | break; | |
5c6cd613 NB |
4695 | case TMR_ABORT_TASK_SET: |
4696 | case TMR_CLEAR_ACA: | |
4697 | case TMR_CLEAR_TASK_SET: | |
c66ac9db NB |
4698 | tmr->response = TMR_TASK_MGMT_FUNCTION_NOT_SUPPORTED; |
4699 | break; | |
5c6cd613 | 4700 | case TMR_LUN_RESET: |
c66ac9db NB |
4701 | ret = core_tmr_lun_reset(dev, tmr, NULL, NULL); |
4702 | tmr->response = (!ret) ? TMR_FUNCTION_COMPLETE : | |
4703 | TMR_FUNCTION_REJECTED; | |
4704 | break; | |
5c6cd613 | 4705 | case TMR_TARGET_WARM_RESET: |
c66ac9db NB |
4706 | tmr->response = TMR_FUNCTION_REJECTED; |
4707 | break; | |
5c6cd613 | 4708 | case TMR_TARGET_COLD_RESET: |
c66ac9db NB |
4709 | tmr->response = TMR_FUNCTION_REJECTED; |
4710 | break; | |
c66ac9db | 4711 | default: |
6708bb27 | 4712 | pr_err("Uknown TMR function: 0x%02x.\n", |
c66ac9db NB |
4713 | tmr->function); |
4714 | tmr->response = TMR_FUNCTION_REJECTED; | |
4715 | break; | |
4716 | } | |
4717 | ||
4718 | cmd->t_state = TRANSPORT_ISTATE_PROCESSING; | |
e3d6f909 | 4719 | cmd->se_tfo->queue_tm_rsp(cmd); |
c66ac9db | 4720 | |
b7b8bef7 | 4721 | transport_cmd_check_stop_to_fabric(cmd); |
c66ac9db NB |
4722 | return 0; |
4723 | } | |
4724 | ||
c66ac9db NB |
4725 | /* transport_processing_thread(): |
4726 | * | |
4727 | * | |
4728 | */ | |
4729 | static int transport_processing_thread(void *param) | |
4730 | { | |
5951146d | 4731 | int ret; |
c66ac9db NB |
4732 | struct se_cmd *cmd; |
4733 | struct se_device *dev = (struct se_device *) param; | |
c66ac9db NB |
4734 | |
4735 | set_user_nice(current, -20); | |
4736 | ||
4737 | while (!kthread_should_stop()) { | |
e3d6f909 AG |
4738 | ret = wait_event_interruptible(dev->dev_queue_obj.thread_wq, |
4739 | atomic_read(&dev->dev_queue_obj.queue_cnt) || | |
c66ac9db NB |
4740 | kthread_should_stop()); |
4741 | if (ret < 0) | |
4742 | goto out; | |
4743 | ||
c66ac9db NB |
4744 | get_cmd: |
4745 | __transport_execute_tasks(dev); | |
4746 | ||
5951146d AG |
4747 | cmd = transport_get_cmd_from_queue(&dev->dev_queue_obj); |
4748 | if (!cmd) | |
c66ac9db NB |
4749 | continue; |
4750 | ||
5951146d | 4751 | switch (cmd->t_state) { |
680b73c5 CH |
4752 | case TRANSPORT_NEW_CMD: |
4753 | BUG(); | |
4754 | break; | |
c66ac9db | 4755 | case TRANSPORT_NEW_CMD_MAP: |
6708bb27 AG |
4756 | if (!cmd->se_tfo->new_cmd_map) { |
4757 | pr_err("cmd->se_tfo->new_cmd_map is" | |
c66ac9db NB |
4758 | " NULL for TRANSPORT_NEW_CMD_MAP\n"); |
4759 | BUG(); | |
4760 | } | |
e3d6f909 | 4761 | ret = cmd->se_tfo->new_cmd_map(cmd); |
c66ac9db NB |
4762 | if (ret < 0) { |
4763 | cmd->transport_error_status = ret; | |
4499dda8 | 4764 | transport_generic_request_failure(cmd, |
c66ac9db NB |
4765 | 0, (cmd->data_direction != |
4766 | DMA_TO_DEVICE)); | |
4767 | break; | |
4768 | } | |
c66ac9db | 4769 | ret = transport_generic_new_cmd(cmd); |
07bde79a NB |
4770 | if (ret == -EAGAIN) |
4771 | break; | |
4772 | else if (ret < 0) { | |
c66ac9db | 4773 | cmd->transport_error_status = ret; |
4499dda8 | 4774 | transport_generic_request_failure(cmd, |
c66ac9db NB |
4775 | 0, (cmd->data_direction != |
4776 | DMA_TO_DEVICE)); | |
4777 | } | |
4778 | break; | |
4779 | case TRANSPORT_PROCESS_WRITE: | |
4780 | transport_generic_process_write(cmd); | |
4781 | break; | |
f4366772 | 4782 | case TRANSPORT_FREE_CMD_INTR: |
82f1c8a4 | 4783 | transport_generic_free_cmd(cmd, 0); |
f4366772 | 4784 | break; |
c66ac9db NB |
4785 | case TRANSPORT_PROCESS_TMR: |
4786 | transport_generic_do_tmr(cmd); | |
4787 | break; | |
07bde79a | 4788 | case TRANSPORT_COMPLETE_QF_WP: |
e057f533 CH |
4789 | transport_write_pending_qf(cmd); |
4790 | break; | |
4791 | case TRANSPORT_COMPLETE_QF_OK: | |
4792 | transport_complete_qf(cmd); | |
07bde79a | 4793 | break; |
c66ac9db | 4794 | default: |
f2da9dbd CH |
4795 | pr_err("Unknown t_state: %d for ITT: 0x%08x " |
4796 | "i_state: %d on SE LUN: %u\n", | |
4797 | cmd->t_state, | |
e3d6f909 AG |
4798 | cmd->se_tfo->get_task_tag(cmd), |
4799 | cmd->se_tfo->get_cmd_state(cmd), | |
4800 | cmd->se_lun->unpacked_lun); | |
c66ac9db NB |
4801 | BUG(); |
4802 | } | |
4803 | ||
4804 | goto get_cmd; | |
4805 | } | |
4806 | ||
4807 | out: | |
ce8762f6 NB |
4808 | WARN_ON(!list_empty(&dev->state_task_list)); |
4809 | WARN_ON(!list_empty(&dev->dev_queue_obj.qobj_list)); | |
c66ac9db NB |
4810 | dev->process_thread = NULL; |
4811 | return 0; | |
4812 | } |