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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); | |
05d1c7c0 | 80 | static int transport_generic_get_mem(struct se_cmd *cmd); |
39c05f32 | 81 | static void transport_put_cmd(struct se_cmd *cmd); |
3df8d40b | 82 | static void transport_remove_cmd_from_queue(struct se_cmd *cmd); |
c66ac9db | 83 | static int transport_set_sense_codes(struct se_cmd *cmd, u8 asc, u8 ascq); |
35e0e757 CH |
84 | static void transport_generic_request_failure(struct se_cmd *, int, int); |
85 | static void target_complete_ok_work(struct work_struct *work); | |
c66ac9db | 86 | |
e3d6f909 | 87 | int init_se_kmem_caches(void) |
c66ac9db | 88 | { |
c66ac9db NB |
89 | se_cmd_cache = kmem_cache_create("se_cmd_cache", |
90 | sizeof(struct se_cmd), __alignof__(struct se_cmd), 0, NULL); | |
6708bb27 AG |
91 | if (!se_cmd_cache) { |
92 | pr_err("kmem_cache_create for struct se_cmd failed\n"); | |
c66ac9db NB |
93 | goto out; |
94 | } | |
95 | se_tmr_req_cache = kmem_cache_create("se_tmr_cache", | |
96 | sizeof(struct se_tmr_req), __alignof__(struct se_tmr_req), | |
97 | 0, NULL); | |
6708bb27 AG |
98 | if (!se_tmr_req_cache) { |
99 | pr_err("kmem_cache_create() for struct se_tmr_req" | |
c66ac9db | 100 | " failed\n"); |
35e0e757 | 101 | goto out_free_cmd_cache; |
c66ac9db NB |
102 | } |
103 | se_sess_cache = kmem_cache_create("se_sess_cache", | |
104 | sizeof(struct se_session), __alignof__(struct se_session), | |
105 | 0, NULL); | |
6708bb27 AG |
106 | if (!se_sess_cache) { |
107 | pr_err("kmem_cache_create() for struct se_session" | |
c66ac9db | 108 | " failed\n"); |
35e0e757 | 109 | goto out_free_tmr_req_cache; |
c66ac9db NB |
110 | } |
111 | se_ua_cache = kmem_cache_create("se_ua_cache", | |
112 | sizeof(struct se_ua), __alignof__(struct se_ua), | |
113 | 0, NULL); | |
6708bb27 AG |
114 | if (!se_ua_cache) { |
115 | pr_err("kmem_cache_create() for struct se_ua failed\n"); | |
35e0e757 | 116 | goto out_free_sess_cache; |
c66ac9db | 117 | } |
c66ac9db NB |
118 | t10_pr_reg_cache = kmem_cache_create("t10_pr_reg_cache", |
119 | sizeof(struct t10_pr_registration), | |
120 | __alignof__(struct t10_pr_registration), 0, NULL); | |
6708bb27 AG |
121 | if (!t10_pr_reg_cache) { |
122 | pr_err("kmem_cache_create() for struct t10_pr_registration" | |
c66ac9db | 123 | " failed\n"); |
35e0e757 | 124 | goto out_free_ua_cache; |
c66ac9db NB |
125 | } |
126 | t10_alua_lu_gp_cache = kmem_cache_create("t10_alua_lu_gp_cache", | |
127 | sizeof(struct t10_alua_lu_gp), __alignof__(struct t10_alua_lu_gp), | |
128 | 0, NULL); | |
6708bb27 AG |
129 | if (!t10_alua_lu_gp_cache) { |
130 | pr_err("kmem_cache_create() for t10_alua_lu_gp_cache" | |
c66ac9db | 131 | " failed\n"); |
35e0e757 | 132 | goto out_free_pr_reg_cache; |
c66ac9db NB |
133 | } |
134 | t10_alua_lu_gp_mem_cache = kmem_cache_create("t10_alua_lu_gp_mem_cache", | |
135 | sizeof(struct t10_alua_lu_gp_member), | |
136 | __alignof__(struct t10_alua_lu_gp_member), 0, NULL); | |
6708bb27 AG |
137 | if (!t10_alua_lu_gp_mem_cache) { |
138 | pr_err("kmem_cache_create() for t10_alua_lu_gp_mem_" | |
c66ac9db | 139 | "cache failed\n"); |
35e0e757 | 140 | goto out_free_lu_gp_cache; |
c66ac9db NB |
141 | } |
142 | t10_alua_tg_pt_gp_cache = kmem_cache_create("t10_alua_tg_pt_gp_cache", | |
143 | sizeof(struct t10_alua_tg_pt_gp), | |
144 | __alignof__(struct t10_alua_tg_pt_gp), 0, NULL); | |
6708bb27 AG |
145 | if (!t10_alua_tg_pt_gp_cache) { |
146 | pr_err("kmem_cache_create() for t10_alua_tg_pt_gp_" | |
c66ac9db | 147 | "cache failed\n"); |
35e0e757 | 148 | goto out_free_lu_gp_mem_cache; |
c66ac9db NB |
149 | } |
150 | t10_alua_tg_pt_gp_mem_cache = kmem_cache_create( | |
151 | "t10_alua_tg_pt_gp_mem_cache", | |
152 | sizeof(struct t10_alua_tg_pt_gp_member), | |
153 | __alignof__(struct t10_alua_tg_pt_gp_member), | |
154 | 0, NULL); | |
6708bb27 AG |
155 | if (!t10_alua_tg_pt_gp_mem_cache) { |
156 | pr_err("kmem_cache_create() for t10_alua_tg_pt_gp_" | |
c66ac9db | 157 | "mem_t failed\n"); |
35e0e757 | 158 | goto out_free_tg_pt_gp_cache; |
c66ac9db NB |
159 | } |
160 | ||
35e0e757 CH |
161 | target_completion_wq = alloc_workqueue("target_completion", |
162 | WQ_MEM_RECLAIM, 0); | |
163 | if (!target_completion_wq) | |
164 | goto out_free_tg_pt_gp_mem_cache; | |
165 | ||
c66ac9db | 166 | return 0; |
35e0e757 CH |
167 | |
168 | out_free_tg_pt_gp_mem_cache: | |
169 | kmem_cache_destroy(t10_alua_tg_pt_gp_mem_cache); | |
170 | out_free_tg_pt_gp_cache: | |
171 | kmem_cache_destroy(t10_alua_tg_pt_gp_cache); | |
172 | out_free_lu_gp_mem_cache: | |
173 | kmem_cache_destroy(t10_alua_lu_gp_mem_cache); | |
174 | out_free_lu_gp_cache: | |
175 | kmem_cache_destroy(t10_alua_lu_gp_cache); | |
176 | out_free_pr_reg_cache: | |
177 | kmem_cache_destroy(t10_pr_reg_cache); | |
178 | out_free_ua_cache: | |
179 | kmem_cache_destroy(se_ua_cache); | |
180 | out_free_sess_cache: | |
181 | kmem_cache_destroy(se_sess_cache); | |
182 | out_free_tmr_req_cache: | |
183 | kmem_cache_destroy(se_tmr_req_cache); | |
184 | out_free_cmd_cache: | |
185 | kmem_cache_destroy(se_cmd_cache); | |
c66ac9db | 186 | out: |
e3d6f909 | 187 | return -ENOMEM; |
c66ac9db NB |
188 | } |
189 | ||
e3d6f909 | 190 | void release_se_kmem_caches(void) |
c66ac9db | 191 | { |
35e0e757 | 192 | destroy_workqueue(target_completion_wq); |
c66ac9db NB |
193 | kmem_cache_destroy(se_cmd_cache); |
194 | kmem_cache_destroy(se_tmr_req_cache); | |
195 | kmem_cache_destroy(se_sess_cache); | |
196 | kmem_cache_destroy(se_ua_cache); | |
c66ac9db NB |
197 | kmem_cache_destroy(t10_pr_reg_cache); |
198 | kmem_cache_destroy(t10_alua_lu_gp_cache); | |
199 | kmem_cache_destroy(t10_alua_lu_gp_mem_cache); | |
200 | kmem_cache_destroy(t10_alua_tg_pt_gp_cache); | |
201 | kmem_cache_destroy(t10_alua_tg_pt_gp_mem_cache); | |
c66ac9db NB |
202 | } |
203 | ||
e3d6f909 AG |
204 | /* This code ensures unique mib indexes are handed out. */ |
205 | static DEFINE_SPINLOCK(scsi_mib_index_lock); | |
206 | static u32 scsi_mib_index[SCSI_INDEX_TYPE_MAX]; | |
e89d15ee NB |
207 | |
208 | /* | |
209 | * Allocate a new row index for the entry type specified | |
210 | */ | |
211 | u32 scsi_get_new_index(scsi_index_t type) | |
212 | { | |
213 | u32 new_index; | |
214 | ||
e3d6f909 | 215 | BUG_ON((type < 0) || (type >= SCSI_INDEX_TYPE_MAX)); |
e89d15ee | 216 | |
e3d6f909 AG |
217 | spin_lock(&scsi_mib_index_lock); |
218 | new_index = ++scsi_mib_index[type]; | |
219 | spin_unlock(&scsi_mib_index_lock); | |
e89d15ee NB |
220 | |
221 | return new_index; | |
222 | } | |
223 | ||
c66ac9db NB |
224 | void transport_init_queue_obj(struct se_queue_obj *qobj) |
225 | { | |
226 | atomic_set(&qobj->queue_cnt, 0); | |
227 | INIT_LIST_HEAD(&qobj->qobj_list); | |
228 | init_waitqueue_head(&qobj->thread_wq); | |
229 | spin_lock_init(&qobj->cmd_queue_lock); | |
230 | } | |
231 | EXPORT_SYMBOL(transport_init_queue_obj); | |
232 | ||
dbc5623e | 233 | void transport_subsystem_check_init(void) |
c66ac9db NB |
234 | { |
235 | int ret; | |
236 | ||
dbc5623e NB |
237 | if (sub_api_initialized) |
238 | return; | |
239 | ||
c66ac9db NB |
240 | ret = request_module("target_core_iblock"); |
241 | if (ret != 0) | |
6708bb27 | 242 | pr_err("Unable to load target_core_iblock\n"); |
c66ac9db NB |
243 | |
244 | ret = request_module("target_core_file"); | |
245 | if (ret != 0) | |
6708bb27 | 246 | pr_err("Unable to load target_core_file\n"); |
c66ac9db NB |
247 | |
248 | ret = request_module("target_core_pscsi"); | |
249 | if (ret != 0) | |
6708bb27 | 250 | pr_err("Unable to load target_core_pscsi\n"); |
c66ac9db NB |
251 | |
252 | ret = request_module("target_core_stgt"); | |
253 | if (ret != 0) | |
6708bb27 | 254 | pr_err("Unable to load target_core_stgt\n"); |
c66ac9db | 255 | |
e3d6f909 | 256 | sub_api_initialized = 1; |
dbc5623e | 257 | return; |
c66ac9db NB |
258 | } |
259 | ||
260 | struct se_session *transport_init_session(void) | |
261 | { | |
262 | struct se_session *se_sess; | |
263 | ||
264 | se_sess = kmem_cache_zalloc(se_sess_cache, GFP_KERNEL); | |
6708bb27 AG |
265 | if (!se_sess) { |
266 | pr_err("Unable to allocate struct se_session from" | |
c66ac9db NB |
267 | " se_sess_cache\n"); |
268 | return ERR_PTR(-ENOMEM); | |
269 | } | |
270 | INIT_LIST_HEAD(&se_sess->sess_list); | |
271 | INIT_LIST_HEAD(&se_sess->sess_acl_list); | |
c66ac9db NB |
272 | |
273 | return se_sess; | |
274 | } | |
275 | EXPORT_SYMBOL(transport_init_session); | |
276 | ||
277 | /* | |
278 | * Called with spin_lock_bh(&struct se_portal_group->session_lock called. | |
279 | */ | |
280 | void __transport_register_session( | |
281 | struct se_portal_group *se_tpg, | |
282 | struct se_node_acl *se_nacl, | |
283 | struct se_session *se_sess, | |
284 | void *fabric_sess_ptr) | |
285 | { | |
286 | unsigned char buf[PR_REG_ISID_LEN]; | |
287 | ||
288 | se_sess->se_tpg = se_tpg; | |
289 | se_sess->fabric_sess_ptr = fabric_sess_ptr; | |
290 | /* | |
291 | * Used by struct se_node_acl's under ConfigFS to locate active se_session-t | |
292 | * | |
293 | * Only set for struct se_session's that will actually be moving I/O. | |
294 | * eg: *NOT* discovery sessions. | |
295 | */ | |
296 | if (se_nacl) { | |
297 | /* | |
298 | * If the fabric module supports an ISID based TransportID, | |
299 | * save this value in binary from the fabric I_T Nexus now. | |
300 | */ | |
e3d6f909 | 301 | if (se_tpg->se_tpg_tfo->sess_get_initiator_sid != NULL) { |
c66ac9db | 302 | memset(&buf[0], 0, PR_REG_ISID_LEN); |
e3d6f909 | 303 | se_tpg->se_tpg_tfo->sess_get_initiator_sid(se_sess, |
c66ac9db NB |
304 | &buf[0], PR_REG_ISID_LEN); |
305 | se_sess->sess_bin_isid = get_unaligned_be64(&buf[0]); | |
306 | } | |
307 | spin_lock_irq(&se_nacl->nacl_sess_lock); | |
308 | /* | |
309 | * The se_nacl->nacl_sess pointer will be set to the | |
310 | * last active I_T Nexus for each struct se_node_acl. | |
311 | */ | |
312 | se_nacl->nacl_sess = se_sess; | |
313 | ||
314 | list_add_tail(&se_sess->sess_acl_list, | |
315 | &se_nacl->acl_sess_list); | |
316 | spin_unlock_irq(&se_nacl->nacl_sess_lock); | |
317 | } | |
318 | list_add_tail(&se_sess->sess_list, &se_tpg->tpg_sess_list); | |
319 | ||
6708bb27 | 320 | pr_debug("TARGET_CORE[%s]: Registered fabric_sess_ptr: %p\n", |
e3d6f909 | 321 | se_tpg->se_tpg_tfo->get_fabric_name(), se_sess->fabric_sess_ptr); |
c66ac9db NB |
322 | } |
323 | EXPORT_SYMBOL(__transport_register_session); | |
324 | ||
325 | void transport_register_session( | |
326 | struct se_portal_group *se_tpg, | |
327 | struct se_node_acl *se_nacl, | |
328 | struct se_session *se_sess, | |
329 | void *fabric_sess_ptr) | |
330 | { | |
331 | spin_lock_bh(&se_tpg->session_lock); | |
332 | __transport_register_session(se_tpg, se_nacl, se_sess, fabric_sess_ptr); | |
333 | spin_unlock_bh(&se_tpg->session_lock); | |
334 | } | |
335 | EXPORT_SYMBOL(transport_register_session); | |
336 | ||
337 | void transport_deregister_session_configfs(struct se_session *se_sess) | |
338 | { | |
339 | struct se_node_acl *se_nacl; | |
23388864 | 340 | unsigned long flags; |
c66ac9db NB |
341 | /* |
342 | * Used by struct se_node_acl's under ConfigFS to locate active struct se_session | |
343 | */ | |
344 | se_nacl = se_sess->se_node_acl; | |
6708bb27 | 345 | if (se_nacl) { |
23388864 | 346 | spin_lock_irqsave(&se_nacl->nacl_sess_lock, flags); |
c66ac9db NB |
347 | list_del(&se_sess->sess_acl_list); |
348 | /* | |
349 | * If the session list is empty, then clear the pointer. | |
350 | * Otherwise, set the struct se_session pointer from the tail | |
351 | * element of the per struct se_node_acl active session list. | |
352 | */ | |
353 | if (list_empty(&se_nacl->acl_sess_list)) | |
354 | se_nacl->nacl_sess = NULL; | |
355 | else { | |
356 | se_nacl->nacl_sess = container_of( | |
357 | se_nacl->acl_sess_list.prev, | |
358 | struct se_session, sess_acl_list); | |
359 | } | |
23388864 | 360 | spin_unlock_irqrestore(&se_nacl->nacl_sess_lock, flags); |
c66ac9db NB |
361 | } |
362 | } | |
363 | EXPORT_SYMBOL(transport_deregister_session_configfs); | |
364 | ||
365 | void transport_free_session(struct se_session *se_sess) | |
366 | { | |
367 | kmem_cache_free(se_sess_cache, se_sess); | |
368 | } | |
369 | EXPORT_SYMBOL(transport_free_session); | |
370 | ||
371 | void transport_deregister_session(struct se_session *se_sess) | |
372 | { | |
373 | struct se_portal_group *se_tpg = se_sess->se_tpg; | |
374 | struct se_node_acl *se_nacl; | |
e63a8e19 | 375 | unsigned long flags; |
c66ac9db | 376 | |
6708bb27 | 377 | if (!se_tpg) { |
c66ac9db NB |
378 | transport_free_session(se_sess); |
379 | return; | |
380 | } | |
c66ac9db | 381 | |
e63a8e19 | 382 | spin_lock_irqsave(&se_tpg->session_lock, flags); |
c66ac9db NB |
383 | list_del(&se_sess->sess_list); |
384 | se_sess->se_tpg = NULL; | |
385 | se_sess->fabric_sess_ptr = NULL; | |
e63a8e19 | 386 | spin_unlock_irqrestore(&se_tpg->session_lock, flags); |
c66ac9db NB |
387 | |
388 | /* | |
389 | * Determine if we need to do extra work for this initiator node's | |
390 | * struct se_node_acl if it had been previously dynamically generated. | |
391 | */ | |
392 | se_nacl = se_sess->se_node_acl; | |
6708bb27 | 393 | if (se_nacl) { |
e63a8e19 | 394 | spin_lock_irqsave(&se_tpg->acl_node_lock, flags); |
c66ac9db | 395 | if (se_nacl->dynamic_node_acl) { |
6708bb27 AG |
396 | if (!se_tpg->se_tpg_tfo->tpg_check_demo_mode_cache( |
397 | se_tpg)) { | |
c66ac9db NB |
398 | list_del(&se_nacl->acl_list); |
399 | se_tpg->num_node_acls--; | |
e63a8e19 | 400 | spin_unlock_irqrestore(&se_tpg->acl_node_lock, flags); |
c66ac9db NB |
401 | |
402 | core_tpg_wait_for_nacl_pr_ref(se_nacl); | |
c66ac9db | 403 | core_free_device_list_for_node(se_nacl, se_tpg); |
e3d6f909 | 404 | se_tpg->se_tpg_tfo->tpg_release_fabric_acl(se_tpg, |
c66ac9db | 405 | se_nacl); |
e63a8e19 | 406 | spin_lock_irqsave(&se_tpg->acl_node_lock, flags); |
c66ac9db NB |
407 | } |
408 | } | |
e63a8e19 | 409 | spin_unlock_irqrestore(&se_tpg->acl_node_lock, flags); |
c66ac9db NB |
410 | } |
411 | ||
412 | transport_free_session(se_sess); | |
413 | ||
6708bb27 | 414 | pr_debug("TARGET_CORE[%s]: Deregistered fabric_sess\n", |
e3d6f909 | 415 | se_tpg->se_tpg_tfo->get_fabric_name()); |
c66ac9db NB |
416 | } |
417 | EXPORT_SYMBOL(transport_deregister_session); | |
418 | ||
419 | /* | |
a1d8b49a | 420 | * Called with cmd->t_state_lock held. |
c66ac9db NB |
421 | */ |
422 | static void transport_all_task_dev_remove_state(struct se_cmd *cmd) | |
423 | { | |
42bf829e | 424 | struct se_device *dev = cmd->se_dev; |
c66ac9db NB |
425 | struct se_task *task; |
426 | unsigned long flags; | |
427 | ||
42bf829e CH |
428 | if (!dev) |
429 | return; | |
c66ac9db | 430 | |
42bf829e | 431 | list_for_each_entry(task, &cmd->t_task_list, t_list) { |
6c76bf95 | 432 | if (task->task_flags & TF_ACTIVE) |
c66ac9db NB |
433 | continue; |
434 | ||
6708bb27 | 435 | if (!atomic_read(&task->task_state_active)) |
c66ac9db NB |
436 | continue; |
437 | ||
438 | spin_lock_irqsave(&dev->execute_task_lock, flags); | |
439 | list_del(&task->t_state_list); | |
6708bb27 AG |
440 | pr_debug("Removed ITT: 0x%08x dev: %p task[%p]\n", |
441 | cmd->se_tfo->get_task_tag(cmd), dev, task); | |
c66ac9db NB |
442 | spin_unlock_irqrestore(&dev->execute_task_lock, flags); |
443 | ||
444 | atomic_set(&task->task_state_active, 0); | |
a1d8b49a | 445 | atomic_dec(&cmd->t_task_cdbs_ex_left); |
c66ac9db NB |
446 | } |
447 | } | |
448 | ||
449 | /* transport_cmd_check_stop(): | |
450 | * | |
451 | * 'transport_off = 1' determines if t_transport_active should be cleared. | |
452 | * 'transport_off = 2' determines if task_dev_state should be removed. | |
453 | * | |
454 | * A non-zero u8 t_state sets cmd->t_state. | |
455 | * Returns 1 when command is stopped, else 0. | |
456 | */ | |
457 | static int transport_cmd_check_stop( | |
458 | struct se_cmd *cmd, | |
459 | int transport_off, | |
460 | u8 t_state) | |
461 | { | |
462 | unsigned long flags; | |
463 | ||
a1d8b49a | 464 | spin_lock_irqsave(&cmd->t_state_lock, flags); |
c66ac9db NB |
465 | /* |
466 | * Determine if IOCTL context caller in requesting the stopping of this | |
467 | * command for LUN shutdown purposes. | |
468 | */ | |
a1d8b49a | 469 | if (atomic_read(&cmd->transport_lun_stop)) { |
6708bb27 | 470 | pr_debug("%s:%d atomic_read(&cmd->transport_lun_stop)" |
c66ac9db | 471 | " == TRUE for ITT: 0x%08x\n", __func__, __LINE__, |
e3d6f909 | 472 | cmd->se_tfo->get_task_tag(cmd)); |
c66ac9db | 473 | |
a1d8b49a | 474 | atomic_set(&cmd->t_transport_active, 0); |
c66ac9db NB |
475 | if (transport_off == 2) |
476 | transport_all_task_dev_remove_state(cmd); | |
a1d8b49a | 477 | spin_unlock_irqrestore(&cmd->t_state_lock, flags); |
c66ac9db | 478 | |
a1d8b49a | 479 | complete(&cmd->transport_lun_stop_comp); |
c66ac9db NB |
480 | return 1; |
481 | } | |
482 | /* | |
483 | * Determine if frontend context caller is requesting the stopping of | |
e3d6f909 | 484 | * this command for frontend exceptions. |
c66ac9db | 485 | */ |
a1d8b49a | 486 | if (atomic_read(&cmd->t_transport_stop)) { |
6708bb27 | 487 | pr_debug("%s:%d atomic_read(&cmd->t_transport_stop) ==" |
c66ac9db | 488 | " TRUE for ITT: 0x%08x\n", __func__, __LINE__, |
e3d6f909 | 489 | cmd->se_tfo->get_task_tag(cmd)); |
c66ac9db | 490 | |
c66ac9db NB |
491 | if (transport_off == 2) |
492 | transport_all_task_dev_remove_state(cmd); | |
493 | ||
494 | /* | |
495 | * Clear struct se_cmd->se_lun before the transport_off == 2 handoff | |
496 | * to FE. | |
497 | */ | |
498 | if (transport_off == 2) | |
499 | cmd->se_lun = NULL; | |
a1d8b49a | 500 | spin_unlock_irqrestore(&cmd->t_state_lock, flags); |
c66ac9db | 501 | |
a1d8b49a | 502 | complete(&cmd->t_transport_stop_comp); |
c66ac9db NB |
503 | return 1; |
504 | } | |
505 | if (transport_off) { | |
a1d8b49a | 506 | atomic_set(&cmd->t_transport_active, 0); |
c66ac9db NB |
507 | if (transport_off == 2) { |
508 | transport_all_task_dev_remove_state(cmd); | |
509 | /* | |
510 | * Clear struct se_cmd->se_lun before the transport_off == 2 | |
511 | * handoff to fabric module. | |
512 | */ | |
513 | cmd->se_lun = NULL; | |
514 | /* | |
515 | * Some fabric modules like tcm_loop can release | |
25985edc | 516 | * their internally allocated I/O reference now and |
c66ac9db NB |
517 | * struct se_cmd now. |
518 | */ | |
e3d6f909 | 519 | if (cmd->se_tfo->check_stop_free != NULL) { |
c66ac9db | 520 | spin_unlock_irqrestore( |
a1d8b49a | 521 | &cmd->t_state_lock, flags); |
c66ac9db | 522 | |
e3d6f909 | 523 | cmd->se_tfo->check_stop_free(cmd); |
c66ac9db NB |
524 | return 1; |
525 | } | |
526 | } | |
a1d8b49a | 527 | spin_unlock_irqrestore(&cmd->t_state_lock, flags); |
c66ac9db NB |
528 | |
529 | return 0; | |
530 | } else if (t_state) | |
531 | cmd->t_state = t_state; | |
a1d8b49a | 532 | spin_unlock_irqrestore(&cmd->t_state_lock, flags); |
c66ac9db NB |
533 | |
534 | return 0; | |
535 | } | |
536 | ||
537 | static int transport_cmd_check_stop_to_fabric(struct se_cmd *cmd) | |
538 | { | |
539 | return transport_cmd_check_stop(cmd, 2, 0); | |
540 | } | |
541 | ||
542 | static void transport_lun_remove_cmd(struct se_cmd *cmd) | |
543 | { | |
e3d6f909 | 544 | struct se_lun *lun = cmd->se_lun; |
c66ac9db NB |
545 | unsigned long flags; |
546 | ||
547 | if (!lun) | |
548 | return; | |
549 | ||
a1d8b49a | 550 | spin_lock_irqsave(&cmd->t_state_lock, flags); |
6708bb27 | 551 | if (!atomic_read(&cmd->transport_dev_active)) { |
a1d8b49a | 552 | spin_unlock_irqrestore(&cmd->t_state_lock, flags); |
c66ac9db NB |
553 | goto check_lun; |
554 | } | |
a1d8b49a | 555 | atomic_set(&cmd->transport_dev_active, 0); |
c66ac9db | 556 | transport_all_task_dev_remove_state(cmd); |
a1d8b49a | 557 | spin_unlock_irqrestore(&cmd->t_state_lock, flags); |
c66ac9db | 558 | |
c66ac9db NB |
559 | |
560 | check_lun: | |
561 | spin_lock_irqsave(&lun->lun_cmd_lock, flags); | |
a1d8b49a | 562 | if (atomic_read(&cmd->transport_lun_active)) { |
5951146d | 563 | list_del(&cmd->se_lun_node); |
a1d8b49a | 564 | atomic_set(&cmd->transport_lun_active, 0); |
c66ac9db | 565 | #if 0 |
6708bb27 | 566 | pr_debug("Removed ITT: 0x%08x from LUN LIST[%d]\n" |
e3d6f909 | 567 | cmd->se_tfo->get_task_tag(cmd), lun->unpacked_lun); |
c66ac9db NB |
568 | #endif |
569 | } | |
570 | spin_unlock_irqrestore(&lun->lun_cmd_lock, flags); | |
571 | } | |
572 | ||
573 | void transport_cmd_finish_abort(struct se_cmd *cmd, int remove) | |
574 | { | |
8dc52b54 NB |
575 | if (!cmd->se_tmr_req) |
576 | transport_lun_remove_cmd(cmd); | |
c66ac9db NB |
577 | |
578 | if (transport_cmd_check_stop_to_fabric(cmd)) | |
579 | return; | |
77039d1e | 580 | if (remove) { |
3df8d40b | 581 | transport_remove_cmd_from_queue(cmd); |
e6a2573f | 582 | transport_put_cmd(cmd); |
77039d1e | 583 | } |
c66ac9db NB |
584 | } |
585 | ||
f7a5cc0b CH |
586 | static void transport_add_cmd_to_queue(struct se_cmd *cmd, int t_state, |
587 | bool at_head) | |
c66ac9db NB |
588 | { |
589 | struct se_device *dev = cmd->se_dev; | |
e3d6f909 | 590 | struct se_queue_obj *qobj = &dev->dev_queue_obj; |
c66ac9db NB |
591 | unsigned long flags; |
592 | ||
c66ac9db | 593 | if (t_state) { |
a1d8b49a | 594 | spin_lock_irqsave(&cmd->t_state_lock, flags); |
c66ac9db | 595 | cmd->t_state = t_state; |
a1d8b49a AG |
596 | atomic_set(&cmd->t_transport_active, 1); |
597 | spin_unlock_irqrestore(&cmd->t_state_lock, flags); | |
c66ac9db NB |
598 | } |
599 | ||
600 | spin_lock_irqsave(&qobj->cmd_queue_lock, flags); | |
79a7fef2 RD |
601 | |
602 | /* If the cmd is already on the list, remove it before we add it */ | |
603 | if (!list_empty(&cmd->se_queue_node)) | |
604 | list_del(&cmd->se_queue_node); | |
605 | else | |
606 | atomic_inc(&qobj->queue_cnt); | |
607 | ||
f7a5cc0b | 608 | if (at_head) |
07bde79a | 609 | list_add(&cmd->se_queue_node, &qobj->qobj_list); |
f7a5cc0b | 610 | else |
07bde79a | 611 | list_add_tail(&cmd->se_queue_node, &qobj->qobj_list); |
79a7fef2 | 612 | atomic_set(&cmd->t_transport_queue_active, 1); |
c66ac9db NB |
613 | spin_unlock_irqrestore(&qobj->cmd_queue_lock, flags); |
614 | ||
c66ac9db | 615 | wake_up_interruptible(&qobj->thread_wq); |
c66ac9db NB |
616 | } |
617 | ||
5951146d AG |
618 | static struct se_cmd * |
619 | transport_get_cmd_from_queue(struct se_queue_obj *qobj) | |
c66ac9db | 620 | { |
5951146d | 621 | struct se_cmd *cmd; |
c66ac9db NB |
622 | unsigned long flags; |
623 | ||
624 | spin_lock_irqsave(&qobj->cmd_queue_lock, flags); | |
625 | if (list_empty(&qobj->qobj_list)) { | |
626 | spin_unlock_irqrestore(&qobj->cmd_queue_lock, flags); | |
627 | return NULL; | |
628 | } | |
5951146d | 629 | cmd = list_first_entry(&qobj->qobj_list, struct se_cmd, se_queue_node); |
c66ac9db | 630 | |
79a7fef2 | 631 | atomic_set(&cmd->t_transport_queue_active, 0); |
c66ac9db | 632 | |
79a7fef2 | 633 | list_del_init(&cmd->se_queue_node); |
c66ac9db NB |
634 | atomic_dec(&qobj->queue_cnt); |
635 | spin_unlock_irqrestore(&qobj->cmd_queue_lock, flags); | |
636 | ||
5951146d | 637 | return cmd; |
c66ac9db NB |
638 | } |
639 | ||
3df8d40b | 640 | static void transport_remove_cmd_from_queue(struct se_cmd *cmd) |
c66ac9db | 641 | { |
3df8d40b | 642 | struct se_queue_obj *qobj = &cmd->se_dev->dev_queue_obj; |
c66ac9db NB |
643 | unsigned long flags; |
644 | ||
645 | spin_lock_irqsave(&qobj->cmd_queue_lock, flags); | |
6708bb27 | 646 | if (!atomic_read(&cmd->t_transport_queue_active)) { |
c66ac9db NB |
647 | spin_unlock_irqrestore(&qobj->cmd_queue_lock, flags); |
648 | return; | |
649 | } | |
79a7fef2 RD |
650 | atomic_set(&cmd->t_transport_queue_active, 0); |
651 | atomic_dec(&qobj->queue_cnt); | |
652 | list_del_init(&cmd->se_queue_node); | |
c66ac9db NB |
653 | spin_unlock_irqrestore(&qobj->cmd_queue_lock, flags); |
654 | ||
a1d8b49a | 655 | if (atomic_read(&cmd->t_transport_queue_active)) { |
6708bb27 | 656 | pr_err("ITT: 0x%08x t_transport_queue_active: %d\n", |
e3d6f909 | 657 | cmd->se_tfo->get_task_tag(cmd), |
a1d8b49a | 658 | atomic_read(&cmd->t_transport_queue_active)); |
c66ac9db NB |
659 | } |
660 | } | |
661 | ||
662 | /* | |
663 | * Completion function used by TCM subsystem plugins (such as FILEIO) | |
664 | * for queueing up response from struct se_subsystem_api->do_task() | |
665 | */ | |
666 | void transport_complete_sync_cache(struct se_cmd *cmd, int good) | |
667 | { | |
a1d8b49a | 668 | struct se_task *task = list_entry(cmd->t_task_list.next, |
c66ac9db NB |
669 | struct se_task, t_list); |
670 | ||
671 | if (good) { | |
672 | cmd->scsi_status = SAM_STAT_GOOD; | |
673 | task->task_scsi_status = GOOD; | |
674 | } else { | |
675 | task->task_scsi_status = SAM_STAT_CHECK_CONDITION; | |
676 | task->task_error_status = PYX_TRANSPORT_ILLEGAL_REQUEST; | |
e3d6f909 | 677 | task->task_se_cmd->transport_error_status = |
c66ac9db NB |
678 | PYX_TRANSPORT_ILLEGAL_REQUEST; |
679 | } | |
680 | ||
681 | transport_complete_task(task, good); | |
682 | } | |
683 | EXPORT_SYMBOL(transport_complete_sync_cache); | |
684 | ||
35e0e757 CH |
685 | static void target_complete_timeout_work(struct work_struct *work) |
686 | { | |
687 | struct se_cmd *cmd = container_of(work, struct se_cmd, work); | |
688 | unsigned long flags; | |
689 | ||
690 | /* | |
691 | * Reset cmd->t_se_count to allow transport_put_cmd() | |
692 | * to allow last call to free memory resources. | |
693 | */ | |
694 | spin_lock_irqsave(&cmd->t_state_lock, flags); | |
695 | if (atomic_read(&cmd->t_transport_timeout) > 1) { | |
696 | int tmp = (atomic_read(&cmd->t_transport_timeout) - 1); | |
697 | ||
698 | atomic_sub(tmp, &cmd->t_se_count); | |
699 | } | |
700 | spin_unlock_irqrestore(&cmd->t_state_lock, flags); | |
701 | ||
702 | transport_put_cmd(cmd); | |
703 | } | |
704 | ||
705 | static void target_complete_failure_work(struct work_struct *work) | |
706 | { | |
707 | struct se_cmd *cmd = container_of(work, struct se_cmd, work); | |
708 | ||
709 | transport_generic_request_failure(cmd, 1, 1); | |
710 | } | |
711 | ||
c66ac9db NB |
712 | /* transport_complete_task(): |
713 | * | |
714 | * Called from interrupt and non interrupt context depending | |
715 | * on the transport plugin. | |
716 | */ | |
717 | void transport_complete_task(struct se_task *task, int success) | |
718 | { | |
e3d6f909 | 719 | struct se_cmd *cmd = task->task_se_cmd; |
42bf829e | 720 | struct se_device *dev = cmd->se_dev; |
c66ac9db NB |
721 | unsigned long flags; |
722 | #if 0 | |
6708bb27 | 723 | pr_debug("task: %p CDB: 0x%02x obj_ptr: %p\n", task, |
a1d8b49a | 724 | cmd->t_task_cdb[0], dev); |
c66ac9db | 725 | #endif |
e3d6f909 | 726 | if (dev) |
c66ac9db | 727 | atomic_inc(&dev->depth_left); |
c66ac9db | 728 | |
cc5d0f0f CH |
729 | del_timer(&task->task_timer); |
730 | ||
a1d8b49a | 731 | spin_lock_irqsave(&cmd->t_state_lock, flags); |
6c76bf95 | 732 | task->task_flags &= ~TF_ACTIVE; |
c66ac9db NB |
733 | |
734 | /* | |
735 | * See if any sense data exists, if so set the TASK_SENSE flag. | |
736 | * Also check for any other post completion work that needs to be | |
737 | * done by the plugins. | |
738 | */ | |
739 | if (dev && dev->transport->transport_complete) { | |
740 | if (dev->transport->transport_complete(task) != 0) { | |
741 | cmd->se_cmd_flags |= SCF_TRANSPORT_TASK_SENSE; | |
742 | task->task_sense = 1; | |
743 | success = 1; | |
744 | } | |
745 | } | |
746 | ||
747 | /* | |
748 | * See if we are waiting for outstanding struct se_task | |
749 | * to complete for an exception condition | |
750 | */ | |
6c76bf95 | 751 | if (task->task_flags & TF_REQUEST_STOP) { |
c66ac9db | 752 | /* |
a1d8b49a | 753 | * Decrement cmd->t_se_count if this task had |
c66ac9db NB |
754 | * previously thrown its timeout exception handler. |
755 | */ | |
6c76bf95 | 756 | if (task->task_flags & TF_TIMEOUT) { |
a1d8b49a | 757 | atomic_dec(&cmd->t_se_count); |
6c76bf95 | 758 | task->task_flags &= ~TF_TIMEOUT; |
c66ac9db | 759 | } |
a1d8b49a | 760 | spin_unlock_irqrestore(&cmd->t_state_lock, flags); |
c66ac9db NB |
761 | |
762 | complete(&task->task_stop_comp); | |
763 | return; | |
764 | } | |
765 | /* | |
766 | * If the task's timeout handler has fired, use the t_task_cdbs_timeout | |
767 | * left counter to determine when the struct se_cmd is ready to be queued to | |
768 | * the processing thread. | |
769 | */ | |
6c76bf95 | 770 | if (task->task_flags & TF_TIMEOUT) { |
35e0e757 CH |
771 | if (!atomic_dec_and_test(&cmd->t_task_cdbs_timeout_left)) { |
772 | spin_unlock_irqrestore(&cmd->t_state_lock, flags); | |
c66ac9db NB |
773 | return; |
774 | } | |
35e0e757 CH |
775 | INIT_WORK(&cmd->work, target_complete_timeout_work); |
776 | goto out_queue; | |
c66ac9db | 777 | } |
a1d8b49a | 778 | atomic_dec(&cmd->t_task_cdbs_timeout_left); |
c66ac9db NB |
779 | |
780 | /* | |
781 | * Decrement the outstanding t_task_cdbs_left count. The last | |
782 | * struct se_task from struct se_cmd will complete itself into the | |
783 | * device queue depending upon int success. | |
784 | */ | |
6708bb27 | 785 | if (!atomic_dec_and_test(&cmd->t_task_cdbs_left)) { |
a1d8b49a | 786 | spin_unlock_irqrestore(&cmd->t_state_lock, flags); |
c66ac9db NB |
787 | return; |
788 | } | |
789 | ||
a1d8b49a | 790 | if (!success || cmd->t_tasks_failed) { |
c66ac9db NB |
791 | if (!task->task_error_status) { |
792 | task->task_error_status = | |
793 | PYX_TRANSPORT_UNKNOWN_SAM_OPCODE; | |
794 | cmd->transport_error_status = | |
795 | PYX_TRANSPORT_UNKNOWN_SAM_OPCODE; | |
796 | } | |
35e0e757 | 797 | INIT_WORK(&cmd->work, target_complete_failure_work); |
c66ac9db | 798 | } else { |
a1d8b49a | 799 | atomic_set(&cmd->t_transport_complete, 1); |
35e0e757 | 800 | INIT_WORK(&cmd->work, target_complete_ok_work); |
c66ac9db | 801 | } |
35e0e757 CH |
802 | |
803 | out_queue: | |
804 | cmd->t_state = TRANSPORT_COMPLETE; | |
805 | atomic_set(&cmd->t_transport_active, 1); | |
a1d8b49a | 806 | spin_unlock_irqrestore(&cmd->t_state_lock, flags); |
c66ac9db | 807 | |
35e0e757 | 808 | queue_work(target_completion_wq, &cmd->work); |
c66ac9db NB |
809 | } |
810 | EXPORT_SYMBOL(transport_complete_task); | |
811 | ||
812 | /* | |
813 | * Called by transport_add_tasks_from_cmd() once a struct se_cmd's | |
814 | * struct se_task list are ready to be added to the active execution list | |
815 | * struct se_device | |
816 | ||
817 | * Called with se_dev_t->execute_task_lock called. | |
818 | */ | |
819 | static inline int transport_add_task_check_sam_attr( | |
820 | struct se_task *task, | |
821 | struct se_task *task_prev, | |
822 | struct se_device *dev) | |
823 | { | |
824 | /* | |
825 | * No SAM Task attribute emulation enabled, add to tail of | |
826 | * execution queue | |
827 | */ | |
828 | if (dev->dev_task_attr_type != SAM_TASK_ATTR_EMULATED) { | |
829 | list_add_tail(&task->t_execute_list, &dev->execute_task_list); | |
830 | return 0; | |
831 | } | |
832 | /* | |
833 | * HEAD_OF_QUEUE attribute for received CDB, which means | |
834 | * the first task that is associated with a struct se_cmd goes to | |
835 | * head of the struct se_device->execute_task_list, and task_prev | |
836 | * after that for each subsequent task | |
837 | */ | |
e66ecd50 | 838 | if (task->task_se_cmd->sam_task_attr == MSG_HEAD_TAG) { |
c66ac9db NB |
839 | list_add(&task->t_execute_list, |
840 | (task_prev != NULL) ? | |
841 | &task_prev->t_execute_list : | |
842 | &dev->execute_task_list); | |
843 | ||
6708bb27 | 844 | pr_debug("Set HEAD_OF_QUEUE for task CDB: 0x%02x" |
c66ac9db | 845 | " in execution queue\n", |
6708bb27 | 846 | task->task_se_cmd->t_task_cdb[0]); |
c66ac9db NB |
847 | return 1; |
848 | } | |
849 | /* | |
850 | * For ORDERED, SIMPLE or UNTAGGED attribute tasks once they have been | |
851 | * transitioned from Dermant -> Active state, and are added to the end | |
852 | * of the struct se_device->execute_task_list | |
853 | */ | |
854 | list_add_tail(&task->t_execute_list, &dev->execute_task_list); | |
855 | return 0; | |
856 | } | |
857 | ||
858 | /* __transport_add_task_to_execute_queue(): | |
859 | * | |
860 | * Called with se_dev_t->execute_task_lock called. | |
861 | */ | |
862 | static void __transport_add_task_to_execute_queue( | |
863 | struct se_task *task, | |
864 | struct se_task *task_prev, | |
865 | struct se_device *dev) | |
866 | { | |
867 | int head_of_queue; | |
868 | ||
869 | head_of_queue = transport_add_task_check_sam_attr(task, task_prev, dev); | |
870 | atomic_inc(&dev->execute_tasks); | |
871 | ||
872 | if (atomic_read(&task->task_state_active)) | |
873 | return; | |
874 | /* | |
875 | * Determine if this task needs to go to HEAD_OF_QUEUE for the | |
876 | * state list as well. Running with SAM Task Attribute emulation | |
877 | * will always return head_of_queue == 0 here | |
878 | */ | |
879 | if (head_of_queue) | |
880 | list_add(&task->t_state_list, (task_prev) ? | |
881 | &task_prev->t_state_list : | |
882 | &dev->state_task_list); | |
883 | else | |
884 | list_add_tail(&task->t_state_list, &dev->state_task_list); | |
885 | ||
886 | atomic_set(&task->task_state_active, 1); | |
887 | ||
6708bb27 | 888 | pr_debug("Added ITT: 0x%08x task[%p] to dev: %p\n", |
e3d6f909 | 889 | task->task_se_cmd->se_tfo->get_task_tag(task->task_se_cmd), |
c66ac9db NB |
890 | task, dev); |
891 | } | |
892 | ||
893 | static void transport_add_tasks_to_state_queue(struct se_cmd *cmd) | |
894 | { | |
42bf829e | 895 | struct se_device *dev = cmd->se_dev; |
c66ac9db NB |
896 | struct se_task *task; |
897 | unsigned long flags; | |
898 | ||
a1d8b49a AG |
899 | spin_lock_irqsave(&cmd->t_state_lock, flags); |
900 | list_for_each_entry(task, &cmd->t_task_list, t_list) { | |
c66ac9db NB |
901 | if (atomic_read(&task->task_state_active)) |
902 | continue; | |
903 | ||
904 | spin_lock(&dev->execute_task_lock); | |
905 | list_add_tail(&task->t_state_list, &dev->state_task_list); | |
906 | atomic_set(&task->task_state_active, 1); | |
907 | ||
6708bb27 AG |
908 | pr_debug("Added ITT: 0x%08x task[%p] to dev: %p\n", |
909 | task->task_se_cmd->se_tfo->get_task_tag( | |
c66ac9db NB |
910 | task->task_se_cmd), task, dev); |
911 | ||
912 | spin_unlock(&dev->execute_task_lock); | |
913 | } | |
a1d8b49a | 914 | spin_unlock_irqrestore(&cmd->t_state_lock, flags); |
c66ac9db NB |
915 | } |
916 | ||
917 | static void transport_add_tasks_from_cmd(struct se_cmd *cmd) | |
918 | { | |
5951146d | 919 | struct se_device *dev = cmd->se_dev; |
c66ac9db NB |
920 | struct se_task *task, *task_prev = NULL; |
921 | unsigned long flags; | |
922 | ||
923 | spin_lock_irqsave(&dev->execute_task_lock, flags); | |
a1d8b49a | 924 | list_for_each_entry(task, &cmd->t_task_list, t_list) { |
04629b7b | 925 | if (!list_empty(&task->t_execute_list)) |
c66ac9db NB |
926 | continue; |
927 | /* | |
928 | * __transport_add_task_to_execute_queue() handles the | |
929 | * SAM Task Attribute emulation if enabled | |
930 | */ | |
931 | __transport_add_task_to_execute_queue(task, task_prev, dev); | |
c66ac9db NB |
932 | task_prev = task; |
933 | } | |
934 | spin_unlock_irqrestore(&dev->execute_task_lock, flags); | |
c66ac9db NB |
935 | } |
936 | ||
04629b7b CH |
937 | void __transport_remove_task_from_execute_queue(struct se_task *task, |
938 | struct se_device *dev) | |
939 | { | |
940 | list_del_init(&task->t_execute_list); | |
941 | atomic_dec(&dev->execute_tasks); | |
942 | } | |
943 | ||
52208ae3 | 944 | void transport_remove_task_from_execute_queue( |
c66ac9db NB |
945 | struct se_task *task, |
946 | struct se_device *dev) | |
947 | { | |
948 | unsigned long flags; | |
949 | ||
04629b7b | 950 | if (WARN_ON(list_empty(&task->t_execute_list))) |
af57c3ac | 951 | return; |
af57c3ac | 952 | |
c66ac9db | 953 | spin_lock_irqsave(&dev->execute_task_lock, flags); |
04629b7b | 954 | __transport_remove_task_from_execute_queue(task, dev); |
c66ac9db NB |
955 | spin_unlock_irqrestore(&dev->execute_task_lock, flags); |
956 | } | |
957 | ||
07bde79a NB |
958 | /* |
959 | * Handle QUEUE_FULL / -EAGAIN status | |
960 | */ | |
961 | ||
962 | static void target_qf_do_work(struct work_struct *work) | |
963 | { | |
964 | struct se_device *dev = container_of(work, struct se_device, | |
965 | qf_work_queue); | |
bcac364a | 966 | LIST_HEAD(qf_cmd_list); |
07bde79a NB |
967 | struct se_cmd *cmd, *cmd_tmp; |
968 | ||
969 | spin_lock_irq(&dev->qf_cmd_lock); | |
bcac364a RD |
970 | list_splice_init(&dev->qf_cmd_list, &qf_cmd_list); |
971 | spin_unlock_irq(&dev->qf_cmd_lock); | |
07bde79a | 972 | |
bcac364a | 973 | list_for_each_entry_safe(cmd, cmd_tmp, &qf_cmd_list, se_qf_node) { |
07bde79a NB |
974 | list_del(&cmd->se_qf_node); |
975 | atomic_dec(&dev->dev_qf_count); | |
976 | smp_mb__after_atomic_dec(); | |
07bde79a | 977 | |
6708bb27 | 978 | pr_debug("Processing %s cmd: %p QUEUE_FULL in work queue" |
07bde79a | 979 | " context: %s\n", cmd->se_tfo->get_fabric_name(), cmd, |
e057f533 | 980 | (cmd->t_state == TRANSPORT_COMPLETE_QF_OK) ? "COMPLETE_OK" : |
07bde79a NB |
981 | (cmd->t_state == TRANSPORT_COMPLETE_QF_WP) ? "WRITE_PENDING" |
982 | : "UNKNOWN"); | |
f7a5cc0b CH |
983 | |
984 | transport_add_cmd_to_queue(cmd, cmd->t_state, true); | |
07bde79a | 985 | } |
07bde79a NB |
986 | } |
987 | ||
c66ac9db NB |
988 | unsigned char *transport_dump_cmd_direction(struct se_cmd *cmd) |
989 | { | |
990 | switch (cmd->data_direction) { | |
991 | case DMA_NONE: | |
992 | return "NONE"; | |
993 | case DMA_FROM_DEVICE: | |
994 | return "READ"; | |
995 | case DMA_TO_DEVICE: | |
996 | return "WRITE"; | |
997 | case DMA_BIDIRECTIONAL: | |
998 | return "BIDI"; | |
999 | default: | |
1000 | break; | |
1001 | } | |
1002 | ||
1003 | return "UNKNOWN"; | |
1004 | } | |
1005 | ||
1006 | void transport_dump_dev_state( | |
1007 | struct se_device *dev, | |
1008 | char *b, | |
1009 | int *bl) | |
1010 | { | |
1011 | *bl += sprintf(b + *bl, "Status: "); | |
1012 | switch (dev->dev_status) { | |
1013 | case TRANSPORT_DEVICE_ACTIVATED: | |
1014 | *bl += sprintf(b + *bl, "ACTIVATED"); | |
1015 | break; | |
1016 | case TRANSPORT_DEVICE_DEACTIVATED: | |
1017 | *bl += sprintf(b + *bl, "DEACTIVATED"); | |
1018 | break; | |
1019 | case TRANSPORT_DEVICE_SHUTDOWN: | |
1020 | *bl += sprintf(b + *bl, "SHUTDOWN"); | |
1021 | break; | |
1022 | case TRANSPORT_DEVICE_OFFLINE_ACTIVATED: | |
1023 | case TRANSPORT_DEVICE_OFFLINE_DEACTIVATED: | |
1024 | *bl += sprintf(b + *bl, "OFFLINE"); | |
1025 | break; | |
1026 | default: | |
1027 | *bl += sprintf(b + *bl, "UNKNOWN=%d", dev->dev_status); | |
1028 | break; | |
1029 | } | |
1030 | ||
1031 | *bl += sprintf(b + *bl, " Execute/Left/Max Queue Depth: %d/%d/%d", | |
1032 | atomic_read(&dev->execute_tasks), atomic_read(&dev->depth_left), | |
1033 | dev->queue_depth); | |
1034 | *bl += sprintf(b + *bl, " SectorSize: %u MaxSectors: %u\n", | |
e3d6f909 | 1035 | dev->se_sub_dev->se_dev_attrib.block_size, dev->se_sub_dev->se_dev_attrib.max_sectors); |
c66ac9db NB |
1036 | *bl += sprintf(b + *bl, " "); |
1037 | } | |
1038 | ||
c66ac9db NB |
1039 | void transport_dump_vpd_proto_id( |
1040 | struct t10_vpd *vpd, | |
1041 | unsigned char *p_buf, | |
1042 | int p_buf_len) | |
1043 | { | |
1044 | unsigned char buf[VPD_TMP_BUF_SIZE]; | |
1045 | int len; | |
1046 | ||
1047 | memset(buf, 0, VPD_TMP_BUF_SIZE); | |
1048 | len = sprintf(buf, "T10 VPD Protocol Identifier: "); | |
1049 | ||
1050 | switch (vpd->protocol_identifier) { | |
1051 | case 0x00: | |
1052 | sprintf(buf+len, "Fibre Channel\n"); | |
1053 | break; | |
1054 | case 0x10: | |
1055 | sprintf(buf+len, "Parallel SCSI\n"); | |
1056 | break; | |
1057 | case 0x20: | |
1058 | sprintf(buf+len, "SSA\n"); | |
1059 | break; | |
1060 | case 0x30: | |
1061 | sprintf(buf+len, "IEEE 1394\n"); | |
1062 | break; | |
1063 | case 0x40: | |
1064 | sprintf(buf+len, "SCSI Remote Direct Memory Access" | |
1065 | " Protocol\n"); | |
1066 | break; | |
1067 | case 0x50: | |
1068 | sprintf(buf+len, "Internet SCSI (iSCSI)\n"); | |
1069 | break; | |
1070 | case 0x60: | |
1071 | sprintf(buf+len, "SAS Serial SCSI Protocol\n"); | |
1072 | break; | |
1073 | case 0x70: | |
1074 | sprintf(buf+len, "Automation/Drive Interface Transport" | |
1075 | " Protocol\n"); | |
1076 | break; | |
1077 | case 0x80: | |
1078 | sprintf(buf+len, "AT Attachment Interface ATA/ATAPI\n"); | |
1079 | break; | |
1080 | default: | |
1081 | sprintf(buf+len, "Unknown 0x%02x\n", | |
1082 | vpd->protocol_identifier); | |
1083 | break; | |
1084 | } | |
1085 | ||
1086 | if (p_buf) | |
1087 | strncpy(p_buf, buf, p_buf_len); | |
1088 | else | |
6708bb27 | 1089 | pr_debug("%s", buf); |
c66ac9db NB |
1090 | } |
1091 | ||
1092 | void | |
1093 | transport_set_vpd_proto_id(struct t10_vpd *vpd, unsigned char *page_83) | |
1094 | { | |
1095 | /* | |
1096 | * Check if the Protocol Identifier Valid (PIV) bit is set.. | |
1097 | * | |
1098 | * from spc3r23.pdf section 7.5.1 | |
1099 | */ | |
1100 | if (page_83[1] & 0x80) { | |
1101 | vpd->protocol_identifier = (page_83[0] & 0xf0); | |
1102 | vpd->protocol_identifier_set = 1; | |
1103 | transport_dump_vpd_proto_id(vpd, NULL, 0); | |
1104 | } | |
1105 | } | |
1106 | EXPORT_SYMBOL(transport_set_vpd_proto_id); | |
1107 | ||
1108 | int transport_dump_vpd_assoc( | |
1109 | struct t10_vpd *vpd, | |
1110 | unsigned char *p_buf, | |
1111 | int p_buf_len) | |
1112 | { | |
1113 | unsigned char buf[VPD_TMP_BUF_SIZE]; | |
e3d6f909 AG |
1114 | int ret = 0; |
1115 | int len; | |
c66ac9db NB |
1116 | |
1117 | memset(buf, 0, VPD_TMP_BUF_SIZE); | |
1118 | len = sprintf(buf, "T10 VPD Identifier Association: "); | |
1119 | ||
1120 | switch (vpd->association) { | |
1121 | case 0x00: | |
1122 | sprintf(buf+len, "addressed logical unit\n"); | |
1123 | break; | |
1124 | case 0x10: | |
1125 | sprintf(buf+len, "target port\n"); | |
1126 | break; | |
1127 | case 0x20: | |
1128 | sprintf(buf+len, "SCSI target device\n"); | |
1129 | break; | |
1130 | default: | |
1131 | sprintf(buf+len, "Unknown 0x%02x\n", vpd->association); | |
e3d6f909 | 1132 | ret = -EINVAL; |
c66ac9db NB |
1133 | break; |
1134 | } | |
1135 | ||
1136 | if (p_buf) | |
1137 | strncpy(p_buf, buf, p_buf_len); | |
1138 | else | |
6708bb27 | 1139 | pr_debug("%s", buf); |
c66ac9db NB |
1140 | |
1141 | return ret; | |
1142 | } | |
1143 | ||
1144 | int transport_set_vpd_assoc(struct t10_vpd *vpd, unsigned char *page_83) | |
1145 | { | |
1146 | /* | |
1147 | * The VPD identification association.. | |
1148 | * | |
1149 | * from spc3r23.pdf Section 7.6.3.1 Table 297 | |
1150 | */ | |
1151 | vpd->association = (page_83[1] & 0x30); | |
1152 | return transport_dump_vpd_assoc(vpd, NULL, 0); | |
1153 | } | |
1154 | EXPORT_SYMBOL(transport_set_vpd_assoc); | |
1155 | ||
1156 | int transport_dump_vpd_ident_type( | |
1157 | struct t10_vpd *vpd, | |
1158 | unsigned char *p_buf, | |
1159 | int p_buf_len) | |
1160 | { | |
1161 | unsigned char buf[VPD_TMP_BUF_SIZE]; | |
e3d6f909 AG |
1162 | int ret = 0; |
1163 | int len; | |
c66ac9db NB |
1164 | |
1165 | memset(buf, 0, VPD_TMP_BUF_SIZE); | |
1166 | len = sprintf(buf, "T10 VPD Identifier Type: "); | |
1167 | ||
1168 | switch (vpd->device_identifier_type) { | |
1169 | case 0x00: | |
1170 | sprintf(buf+len, "Vendor specific\n"); | |
1171 | break; | |
1172 | case 0x01: | |
1173 | sprintf(buf+len, "T10 Vendor ID based\n"); | |
1174 | break; | |
1175 | case 0x02: | |
1176 | sprintf(buf+len, "EUI-64 based\n"); | |
1177 | break; | |
1178 | case 0x03: | |
1179 | sprintf(buf+len, "NAA\n"); | |
1180 | break; | |
1181 | case 0x04: | |
1182 | sprintf(buf+len, "Relative target port identifier\n"); | |
1183 | break; | |
1184 | case 0x08: | |
1185 | sprintf(buf+len, "SCSI name string\n"); | |
1186 | break; | |
1187 | default: | |
1188 | sprintf(buf+len, "Unsupported: 0x%02x\n", | |
1189 | vpd->device_identifier_type); | |
e3d6f909 | 1190 | ret = -EINVAL; |
c66ac9db NB |
1191 | break; |
1192 | } | |
1193 | ||
e3d6f909 AG |
1194 | if (p_buf) { |
1195 | if (p_buf_len < strlen(buf)+1) | |
1196 | return -EINVAL; | |
c66ac9db | 1197 | strncpy(p_buf, buf, p_buf_len); |
e3d6f909 | 1198 | } else { |
6708bb27 | 1199 | pr_debug("%s", buf); |
e3d6f909 | 1200 | } |
c66ac9db NB |
1201 | |
1202 | return ret; | |
1203 | } | |
1204 | ||
1205 | int transport_set_vpd_ident_type(struct t10_vpd *vpd, unsigned char *page_83) | |
1206 | { | |
1207 | /* | |
1208 | * The VPD identifier type.. | |
1209 | * | |
1210 | * from spc3r23.pdf Section 7.6.3.1 Table 298 | |
1211 | */ | |
1212 | vpd->device_identifier_type = (page_83[1] & 0x0f); | |
1213 | return transport_dump_vpd_ident_type(vpd, NULL, 0); | |
1214 | } | |
1215 | EXPORT_SYMBOL(transport_set_vpd_ident_type); | |
1216 | ||
1217 | int transport_dump_vpd_ident( | |
1218 | struct t10_vpd *vpd, | |
1219 | unsigned char *p_buf, | |
1220 | int p_buf_len) | |
1221 | { | |
1222 | unsigned char buf[VPD_TMP_BUF_SIZE]; | |
1223 | int ret = 0; | |
1224 | ||
1225 | memset(buf, 0, VPD_TMP_BUF_SIZE); | |
1226 | ||
1227 | switch (vpd->device_identifier_code_set) { | |
1228 | case 0x01: /* Binary */ | |
1229 | sprintf(buf, "T10 VPD Binary Device Identifier: %s\n", | |
1230 | &vpd->device_identifier[0]); | |
1231 | break; | |
1232 | case 0x02: /* ASCII */ | |
1233 | sprintf(buf, "T10 VPD ASCII Device Identifier: %s\n", | |
1234 | &vpd->device_identifier[0]); | |
1235 | break; | |
1236 | case 0x03: /* UTF-8 */ | |
1237 | sprintf(buf, "T10 VPD UTF-8 Device Identifier: %s\n", | |
1238 | &vpd->device_identifier[0]); | |
1239 | break; | |
1240 | default: | |
1241 | sprintf(buf, "T10 VPD Device Identifier encoding unsupported:" | |
1242 | " 0x%02x", vpd->device_identifier_code_set); | |
e3d6f909 | 1243 | ret = -EINVAL; |
c66ac9db NB |
1244 | break; |
1245 | } | |
1246 | ||
1247 | if (p_buf) | |
1248 | strncpy(p_buf, buf, p_buf_len); | |
1249 | else | |
6708bb27 | 1250 | pr_debug("%s", buf); |
c66ac9db NB |
1251 | |
1252 | return ret; | |
1253 | } | |
1254 | ||
1255 | int | |
1256 | transport_set_vpd_ident(struct t10_vpd *vpd, unsigned char *page_83) | |
1257 | { | |
1258 | static const char hex_str[] = "0123456789abcdef"; | |
1259 | int j = 0, i = 4; /* offset to start of the identifer */ | |
1260 | ||
1261 | /* | |
1262 | * The VPD Code Set (encoding) | |
1263 | * | |
1264 | * from spc3r23.pdf Section 7.6.3.1 Table 296 | |
1265 | */ | |
1266 | vpd->device_identifier_code_set = (page_83[0] & 0x0f); | |
1267 | switch (vpd->device_identifier_code_set) { | |
1268 | case 0x01: /* Binary */ | |
1269 | vpd->device_identifier[j++] = | |
1270 | hex_str[vpd->device_identifier_type]; | |
1271 | while (i < (4 + page_83[3])) { | |
1272 | vpd->device_identifier[j++] = | |
1273 | hex_str[(page_83[i] & 0xf0) >> 4]; | |
1274 | vpd->device_identifier[j++] = | |
1275 | hex_str[page_83[i] & 0x0f]; | |
1276 | i++; | |
1277 | } | |
1278 | break; | |
1279 | case 0x02: /* ASCII */ | |
1280 | case 0x03: /* UTF-8 */ | |
1281 | while (i < (4 + page_83[3])) | |
1282 | vpd->device_identifier[j++] = page_83[i++]; | |
1283 | break; | |
1284 | default: | |
1285 | break; | |
1286 | } | |
1287 | ||
1288 | return transport_dump_vpd_ident(vpd, NULL, 0); | |
1289 | } | |
1290 | EXPORT_SYMBOL(transport_set_vpd_ident); | |
1291 | ||
1292 | static void core_setup_task_attr_emulation(struct se_device *dev) | |
1293 | { | |
1294 | /* | |
1295 | * If this device is from Target_Core_Mod/pSCSI, disable the | |
1296 | * SAM Task Attribute emulation. | |
1297 | * | |
1298 | * This is currently not available in upsream Linux/SCSI Target | |
1299 | * mode code, and is assumed to be disabled while using TCM/pSCSI. | |
1300 | */ | |
e3d6f909 | 1301 | if (dev->transport->transport_type == TRANSPORT_PLUGIN_PHBA_PDEV) { |
c66ac9db NB |
1302 | dev->dev_task_attr_type = SAM_TASK_ATTR_PASSTHROUGH; |
1303 | return; | |
1304 | } | |
1305 | ||
1306 | dev->dev_task_attr_type = SAM_TASK_ATTR_EMULATED; | |
6708bb27 | 1307 | pr_debug("%s: Using SAM_TASK_ATTR_EMULATED for SPC: 0x%02x" |
e3d6f909 AG |
1308 | " device\n", dev->transport->name, |
1309 | dev->transport->get_device_rev(dev)); | |
c66ac9db NB |
1310 | } |
1311 | ||
1312 | static void scsi_dump_inquiry(struct se_device *dev) | |
1313 | { | |
e3d6f909 | 1314 | struct t10_wwn *wwn = &dev->se_sub_dev->t10_wwn; |
c66ac9db NB |
1315 | int i, device_type; |
1316 | /* | |
1317 | * Print Linux/SCSI style INQUIRY formatting to the kernel ring buffer | |
1318 | */ | |
6708bb27 | 1319 | pr_debug(" Vendor: "); |
c66ac9db NB |
1320 | for (i = 0; i < 8; i++) |
1321 | if (wwn->vendor[i] >= 0x20) | |
6708bb27 | 1322 | pr_debug("%c", wwn->vendor[i]); |
c66ac9db | 1323 | else |
6708bb27 | 1324 | pr_debug(" "); |
c66ac9db | 1325 | |
6708bb27 | 1326 | pr_debug(" Model: "); |
c66ac9db NB |
1327 | for (i = 0; i < 16; i++) |
1328 | if (wwn->model[i] >= 0x20) | |
6708bb27 | 1329 | pr_debug("%c", wwn->model[i]); |
c66ac9db | 1330 | else |
6708bb27 | 1331 | pr_debug(" "); |
c66ac9db | 1332 | |
6708bb27 | 1333 | pr_debug(" Revision: "); |
c66ac9db NB |
1334 | for (i = 0; i < 4; i++) |
1335 | if (wwn->revision[i] >= 0x20) | |
6708bb27 | 1336 | pr_debug("%c", wwn->revision[i]); |
c66ac9db | 1337 | else |
6708bb27 | 1338 | pr_debug(" "); |
c66ac9db | 1339 | |
6708bb27 | 1340 | pr_debug("\n"); |
c66ac9db | 1341 | |
e3d6f909 | 1342 | device_type = dev->transport->get_device_type(dev); |
6708bb27 AG |
1343 | pr_debug(" Type: %s ", scsi_device_type(device_type)); |
1344 | pr_debug(" ANSI SCSI revision: %02x\n", | |
e3d6f909 | 1345 | dev->transport->get_device_rev(dev)); |
c66ac9db NB |
1346 | } |
1347 | ||
1348 | struct se_device *transport_add_device_to_core_hba( | |
1349 | struct se_hba *hba, | |
1350 | struct se_subsystem_api *transport, | |
1351 | struct se_subsystem_dev *se_dev, | |
1352 | u32 device_flags, | |
1353 | void *transport_dev, | |
1354 | struct se_dev_limits *dev_limits, | |
1355 | const char *inquiry_prod, | |
1356 | const char *inquiry_rev) | |
1357 | { | |
12a18bdc | 1358 | int force_pt; |
c66ac9db NB |
1359 | struct se_device *dev; |
1360 | ||
1361 | dev = kzalloc(sizeof(struct se_device), GFP_KERNEL); | |
6708bb27 AG |
1362 | if (!dev) { |
1363 | pr_err("Unable to allocate memory for se_dev_t\n"); | |
c66ac9db NB |
1364 | return NULL; |
1365 | } | |
c66ac9db | 1366 | |
e3d6f909 | 1367 | transport_init_queue_obj(&dev->dev_queue_obj); |
c66ac9db NB |
1368 | dev->dev_flags = device_flags; |
1369 | dev->dev_status |= TRANSPORT_DEVICE_DEACTIVATED; | |
5951146d | 1370 | dev->dev_ptr = transport_dev; |
c66ac9db NB |
1371 | dev->se_hba = hba; |
1372 | dev->se_sub_dev = se_dev; | |
1373 | dev->transport = transport; | |
1374 | atomic_set(&dev->active_cmds, 0); | |
1375 | INIT_LIST_HEAD(&dev->dev_list); | |
1376 | INIT_LIST_HEAD(&dev->dev_sep_list); | |
1377 | INIT_LIST_HEAD(&dev->dev_tmr_list); | |
1378 | INIT_LIST_HEAD(&dev->execute_task_list); | |
1379 | INIT_LIST_HEAD(&dev->delayed_cmd_list); | |
1380 | INIT_LIST_HEAD(&dev->ordered_cmd_list); | |
1381 | INIT_LIST_HEAD(&dev->state_task_list); | |
07bde79a | 1382 | INIT_LIST_HEAD(&dev->qf_cmd_list); |
c66ac9db NB |
1383 | spin_lock_init(&dev->execute_task_lock); |
1384 | spin_lock_init(&dev->delayed_cmd_lock); | |
1385 | spin_lock_init(&dev->ordered_cmd_lock); | |
1386 | spin_lock_init(&dev->state_task_lock); | |
1387 | spin_lock_init(&dev->dev_alua_lock); | |
1388 | spin_lock_init(&dev->dev_reservation_lock); | |
1389 | spin_lock_init(&dev->dev_status_lock); | |
1390 | spin_lock_init(&dev->dev_status_thr_lock); | |
1391 | spin_lock_init(&dev->se_port_lock); | |
1392 | spin_lock_init(&dev->se_tmr_lock); | |
07bde79a | 1393 | spin_lock_init(&dev->qf_cmd_lock); |
c66ac9db NB |
1394 | |
1395 | dev->queue_depth = dev_limits->queue_depth; | |
1396 | atomic_set(&dev->depth_left, dev->queue_depth); | |
1397 | atomic_set(&dev->dev_ordered_id, 0); | |
1398 | ||
1399 | se_dev_set_default_attribs(dev, dev_limits); | |
1400 | ||
1401 | dev->dev_index = scsi_get_new_index(SCSI_DEVICE_INDEX); | |
1402 | dev->creation_time = get_jiffies_64(); | |
1403 | spin_lock_init(&dev->stats_lock); | |
1404 | ||
1405 | spin_lock(&hba->device_lock); | |
1406 | list_add_tail(&dev->dev_list, &hba->hba_dev_list); | |
1407 | hba->dev_count++; | |
1408 | spin_unlock(&hba->device_lock); | |
1409 | /* | |
1410 | * Setup the SAM Task Attribute emulation for struct se_device | |
1411 | */ | |
1412 | core_setup_task_attr_emulation(dev); | |
1413 | /* | |
1414 | * Force PR and ALUA passthrough emulation with internal object use. | |
1415 | */ | |
1416 | force_pt = (hba->hba_flags & HBA_FLAGS_INTERNAL_USE); | |
1417 | /* | |
1418 | * Setup the Reservations infrastructure for struct se_device | |
1419 | */ | |
1420 | core_setup_reservations(dev, force_pt); | |
1421 | /* | |
1422 | * Setup the Asymmetric Logical Unit Assignment for struct se_device | |
1423 | */ | |
1424 | if (core_setup_alua(dev, force_pt) < 0) | |
1425 | goto out; | |
1426 | ||
1427 | /* | |
1428 | * Startup the struct se_device processing thread | |
1429 | */ | |
1430 | dev->process_thread = kthread_run(transport_processing_thread, dev, | |
e3d6f909 | 1431 | "LIO_%s", dev->transport->name); |
c66ac9db | 1432 | if (IS_ERR(dev->process_thread)) { |
6708bb27 | 1433 | pr_err("Unable to create kthread: LIO_%s\n", |
e3d6f909 | 1434 | dev->transport->name); |
c66ac9db NB |
1435 | goto out; |
1436 | } | |
07bde79a NB |
1437 | /* |
1438 | * Setup work_queue for QUEUE_FULL | |
1439 | */ | |
1440 | INIT_WORK(&dev->qf_work_queue, target_qf_do_work); | |
c66ac9db NB |
1441 | /* |
1442 | * Preload the initial INQUIRY const values if we are doing | |
1443 | * anything virtual (IBLOCK, FILEIO, RAMDISK), but not for TCM/pSCSI | |
1444 | * passthrough because this is being provided by the backend LLD. | |
1445 | * This is required so that transport_get_inquiry() copies these | |
1446 | * originals once back into DEV_T10_WWN(dev) for the virtual device | |
1447 | * setup. | |
1448 | */ | |
e3d6f909 | 1449 | if (dev->transport->transport_type != TRANSPORT_PLUGIN_PHBA_PDEV) { |
f22c1196 | 1450 | if (!inquiry_prod || !inquiry_rev) { |
6708bb27 | 1451 | pr_err("All non TCM/pSCSI plugins require" |
c66ac9db NB |
1452 | " INQUIRY consts\n"); |
1453 | goto out; | |
1454 | } | |
1455 | ||
e3d6f909 AG |
1456 | strncpy(&dev->se_sub_dev->t10_wwn.vendor[0], "LIO-ORG", 8); |
1457 | strncpy(&dev->se_sub_dev->t10_wwn.model[0], inquiry_prod, 16); | |
1458 | strncpy(&dev->se_sub_dev->t10_wwn.revision[0], inquiry_rev, 4); | |
c66ac9db NB |
1459 | } |
1460 | scsi_dump_inquiry(dev); | |
1461 | ||
12a18bdc | 1462 | return dev; |
c66ac9db | 1463 | out: |
c66ac9db NB |
1464 | kthread_stop(dev->process_thread); |
1465 | ||
1466 | spin_lock(&hba->device_lock); | |
1467 | list_del(&dev->dev_list); | |
1468 | hba->dev_count--; | |
1469 | spin_unlock(&hba->device_lock); | |
1470 | ||
1471 | se_release_vpd_for_dev(dev); | |
1472 | ||
c66ac9db NB |
1473 | kfree(dev); |
1474 | ||
1475 | return NULL; | |
1476 | } | |
1477 | EXPORT_SYMBOL(transport_add_device_to_core_hba); | |
1478 | ||
1479 | /* transport_generic_prepare_cdb(): | |
1480 | * | |
1481 | * Since the Initiator sees iSCSI devices as LUNs, the SCSI CDB will | |
1482 | * contain the iSCSI LUN in bits 7-5 of byte 1 as per SAM-2. | |
1483 | * The point of this is since we are mapping iSCSI LUNs to | |
1484 | * SCSI Target IDs having a non-zero LUN in the CDB will throw the | |
1485 | * devices and HBAs for a loop. | |
1486 | */ | |
1487 | static inline void transport_generic_prepare_cdb( | |
1488 | unsigned char *cdb) | |
1489 | { | |
1490 | switch (cdb[0]) { | |
1491 | case READ_10: /* SBC - RDProtect */ | |
1492 | case READ_12: /* SBC - RDProtect */ | |
1493 | case READ_16: /* SBC - RDProtect */ | |
1494 | case SEND_DIAGNOSTIC: /* SPC - SELF-TEST Code */ | |
1495 | case VERIFY: /* SBC - VRProtect */ | |
1496 | case VERIFY_16: /* SBC - VRProtect */ | |
1497 | case WRITE_VERIFY: /* SBC - VRProtect */ | |
1498 | case WRITE_VERIFY_12: /* SBC - VRProtect */ | |
1499 | break; | |
1500 | default: | |
1501 | cdb[1] &= 0x1f; /* clear logical unit number */ | |
1502 | break; | |
1503 | } | |
1504 | } | |
1505 | ||
1506 | static struct se_task * | |
1507 | transport_generic_get_task(struct se_cmd *cmd, | |
1508 | enum dma_data_direction data_direction) | |
1509 | { | |
1510 | struct se_task *task; | |
5951146d | 1511 | struct se_device *dev = cmd->se_dev; |
c66ac9db | 1512 | |
6708bb27 | 1513 | task = dev->transport->alloc_task(cmd->t_task_cdb); |
c66ac9db | 1514 | if (!task) { |
6708bb27 | 1515 | pr_err("Unable to allocate struct se_task\n"); |
c66ac9db NB |
1516 | return NULL; |
1517 | } | |
1518 | ||
1519 | INIT_LIST_HEAD(&task->t_list); | |
1520 | INIT_LIST_HEAD(&task->t_execute_list); | |
1521 | INIT_LIST_HEAD(&task->t_state_list); | |
cc5d0f0f | 1522 | init_timer(&task->task_timer); |
c66ac9db | 1523 | init_completion(&task->task_stop_comp); |
c66ac9db | 1524 | task->task_se_cmd = cmd; |
c66ac9db NB |
1525 | task->task_data_direction = data_direction; |
1526 | ||
c66ac9db NB |
1527 | return task; |
1528 | } | |
1529 | ||
1530 | static int transport_generic_cmd_sequencer(struct se_cmd *, unsigned char *); | |
1531 | ||
c66ac9db NB |
1532 | /* |
1533 | * Used by fabric modules containing a local struct se_cmd within their | |
1534 | * fabric dependent per I/O descriptor. | |
1535 | */ | |
1536 | void transport_init_se_cmd( | |
1537 | struct se_cmd *cmd, | |
1538 | struct target_core_fabric_ops *tfo, | |
1539 | struct se_session *se_sess, | |
1540 | u32 data_length, | |
1541 | int data_direction, | |
1542 | int task_attr, | |
1543 | unsigned char *sense_buffer) | |
1544 | { | |
5951146d AG |
1545 | INIT_LIST_HEAD(&cmd->se_lun_node); |
1546 | INIT_LIST_HEAD(&cmd->se_delayed_node); | |
1547 | INIT_LIST_HEAD(&cmd->se_ordered_node); | |
07bde79a | 1548 | INIT_LIST_HEAD(&cmd->se_qf_node); |
79a7fef2 | 1549 | INIT_LIST_HEAD(&cmd->se_queue_node); |
c66ac9db | 1550 | |
a1d8b49a AG |
1551 | INIT_LIST_HEAD(&cmd->t_task_list); |
1552 | init_completion(&cmd->transport_lun_fe_stop_comp); | |
1553 | init_completion(&cmd->transport_lun_stop_comp); | |
1554 | init_completion(&cmd->t_transport_stop_comp); | |
1555 | spin_lock_init(&cmd->t_state_lock); | |
1556 | atomic_set(&cmd->transport_dev_active, 1); | |
c66ac9db NB |
1557 | |
1558 | cmd->se_tfo = tfo; | |
1559 | cmd->se_sess = se_sess; | |
1560 | cmd->data_length = data_length; | |
1561 | cmd->data_direction = data_direction; | |
1562 | cmd->sam_task_attr = task_attr; | |
1563 | cmd->sense_buffer = sense_buffer; | |
1564 | } | |
1565 | EXPORT_SYMBOL(transport_init_se_cmd); | |
1566 | ||
1567 | static int transport_check_alloc_task_attr(struct se_cmd *cmd) | |
1568 | { | |
1569 | /* | |
1570 | * Check if SAM Task Attribute emulation is enabled for this | |
1571 | * struct se_device storage object | |
1572 | */ | |
5951146d | 1573 | if (cmd->se_dev->dev_task_attr_type != SAM_TASK_ATTR_EMULATED) |
c66ac9db NB |
1574 | return 0; |
1575 | ||
e66ecd50 | 1576 | if (cmd->sam_task_attr == MSG_ACA_TAG) { |
6708bb27 | 1577 | pr_debug("SAM Task Attribute ACA" |
c66ac9db | 1578 | " emulation is not supported\n"); |
e3d6f909 | 1579 | return -EINVAL; |
c66ac9db NB |
1580 | } |
1581 | /* | |
1582 | * Used to determine when ORDERED commands should go from | |
1583 | * Dormant to Active status. | |
1584 | */ | |
5951146d | 1585 | cmd->se_ordered_id = atomic_inc_return(&cmd->se_dev->dev_ordered_id); |
c66ac9db | 1586 | smp_mb__after_atomic_inc(); |
6708bb27 | 1587 | pr_debug("Allocated se_ordered_id: %u for Task Attr: 0x%02x on %s\n", |
c66ac9db | 1588 | cmd->se_ordered_id, cmd->sam_task_attr, |
6708bb27 | 1589 | cmd->se_dev->transport->name); |
c66ac9db NB |
1590 | return 0; |
1591 | } | |
1592 | ||
c66ac9db NB |
1593 | /* transport_generic_allocate_tasks(): |
1594 | * | |
1595 | * Called from fabric RX Thread. | |
1596 | */ | |
1597 | int transport_generic_allocate_tasks( | |
1598 | struct se_cmd *cmd, | |
1599 | unsigned char *cdb) | |
1600 | { | |
1601 | int ret; | |
1602 | ||
1603 | transport_generic_prepare_cdb(cdb); | |
c66ac9db NB |
1604 | /* |
1605 | * Ensure that the received CDB is less than the max (252 + 8) bytes | |
1606 | * for VARIABLE_LENGTH_CMD | |
1607 | */ | |
1608 | if (scsi_command_size(cdb) > SCSI_MAX_VARLEN_CDB_SIZE) { | |
6708bb27 | 1609 | pr_err("Received SCSI CDB with command_size: %d that" |
c66ac9db NB |
1610 | " exceeds SCSI_MAX_VARLEN_CDB_SIZE: %d\n", |
1611 | scsi_command_size(cdb), SCSI_MAX_VARLEN_CDB_SIZE); | |
e3d6f909 | 1612 | return -EINVAL; |
c66ac9db NB |
1613 | } |
1614 | /* | |
1615 | * If the received CDB is larger than TCM_MAX_COMMAND_SIZE, | |
1616 | * allocate the additional extended CDB buffer now.. Otherwise | |
1617 | * setup the pointer from __t_task_cdb to t_task_cdb. | |
1618 | */ | |
a1d8b49a AG |
1619 | if (scsi_command_size(cdb) > sizeof(cmd->__t_task_cdb)) { |
1620 | cmd->t_task_cdb = kzalloc(scsi_command_size(cdb), | |
c66ac9db | 1621 | GFP_KERNEL); |
6708bb27 AG |
1622 | if (!cmd->t_task_cdb) { |
1623 | pr_err("Unable to allocate cmd->t_task_cdb" | |
a1d8b49a | 1624 | " %u > sizeof(cmd->__t_task_cdb): %lu ops\n", |
c66ac9db | 1625 | scsi_command_size(cdb), |
a1d8b49a | 1626 | (unsigned long)sizeof(cmd->__t_task_cdb)); |
e3d6f909 | 1627 | return -ENOMEM; |
c66ac9db NB |
1628 | } |
1629 | } else | |
a1d8b49a | 1630 | cmd->t_task_cdb = &cmd->__t_task_cdb[0]; |
c66ac9db | 1631 | /* |
a1d8b49a | 1632 | * Copy the original CDB into cmd-> |
c66ac9db | 1633 | */ |
a1d8b49a | 1634 | memcpy(cmd->t_task_cdb, cdb, scsi_command_size(cdb)); |
c66ac9db NB |
1635 | /* |
1636 | * Setup the received CDB based on SCSI defined opcodes and | |
1637 | * perform unit attention, persistent reservations and ALUA | |
a1d8b49a | 1638 | * checks for virtual device backends. The cmd->t_task_cdb |
c66ac9db NB |
1639 | * pointer is expected to be setup before we reach this point. |
1640 | */ | |
1641 | ret = transport_generic_cmd_sequencer(cmd, cdb); | |
1642 | if (ret < 0) | |
1643 | return ret; | |
1644 | /* | |
1645 | * Check for SAM Task Attribute Emulation | |
1646 | */ | |
1647 | if (transport_check_alloc_task_attr(cmd) < 0) { | |
1648 | cmd->se_cmd_flags |= SCF_SCSI_CDB_EXCEPTION; | |
1649 | cmd->scsi_sense_reason = TCM_INVALID_CDB_FIELD; | |
5951146d | 1650 | return -EINVAL; |
c66ac9db NB |
1651 | } |
1652 | spin_lock(&cmd->se_lun->lun_sep_lock); | |
1653 | if (cmd->se_lun->lun_sep) | |
1654 | cmd->se_lun->lun_sep->sep_stats.cmd_pdus++; | |
1655 | spin_unlock(&cmd->se_lun->lun_sep_lock); | |
1656 | return 0; | |
1657 | } | |
1658 | EXPORT_SYMBOL(transport_generic_allocate_tasks); | |
1659 | ||
695434e1 NB |
1660 | /* |
1661 | * Used by fabric module frontends to queue tasks directly. | |
1662 | * Many only be used from process context only | |
1663 | */ | |
1664 | int transport_handle_cdb_direct( | |
1665 | struct se_cmd *cmd) | |
1666 | { | |
dd8ae59d NB |
1667 | int ret; |
1668 | ||
695434e1 NB |
1669 | if (!cmd->se_lun) { |
1670 | dump_stack(); | |
6708bb27 | 1671 | pr_err("cmd->se_lun is NULL\n"); |
695434e1 NB |
1672 | return -EINVAL; |
1673 | } | |
1674 | if (in_interrupt()) { | |
1675 | dump_stack(); | |
6708bb27 | 1676 | pr_err("transport_generic_handle_cdb cannot be called" |
695434e1 NB |
1677 | " from interrupt context\n"); |
1678 | return -EINVAL; | |
1679 | } | |
dd8ae59d NB |
1680 | /* |
1681 | * Set TRANSPORT_NEW_CMD state and cmd->t_transport_active=1 following | |
1682 | * transport_generic_handle_cdb*() -> transport_add_cmd_to_queue() | |
1683 | * in existing usage to ensure that outstanding descriptors are handled | |
d14921d6 | 1684 | * correctly during shutdown via transport_wait_for_tasks() |
dd8ae59d NB |
1685 | * |
1686 | * Also, we don't take cmd->t_state_lock here as we only expect | |
1687 | * this to be called for initial descriptor submission. | |
1688 | */ | |
1689 | cmd->t_state = TRANSPORT_NEW_CMD; | |
1690 | atomic_set(&cmd->t_transport_active, 1); | |
1691 | /* | |
1692 | * transport_generic_new_cmd() is already handling QUEUE_FULL, | |
1693 | * so follow TRANSPORT_NEW_CMD processing thread context usage | |
1694 | * and call transport_generic_request_failure() if necessary.. | |
1695 | */ | |
1696 | ret = transport_generic_new_cmd(cmd); | |
1697 | if (ret == -EAGAIN) | |
1698 | return 0; | |
1699 | else if (ret < 0) { | |
1700 | cmd->transport_error_status = ret; | |
4499dda8 | 1701 | transport_generic_request_failure(cmd, 0, |
dd8ae59d NB |
1702 | (cmd->data_direction != DMA_TO_DEVICE)); |
1703 | } | |
1704 | return 0; | |
695434e1 NB |
1705 | } |
1706 | EXPORT_SYMBOL(transport_handle_cdb_direct); | |
1707 | ||
c66ac9db NB |
1708 | /* |
1709 | * Used by fabric module frontends defining a TFO->new_cmd_map() caller | |
1710 | * to queue up a newly setup se_cmd w/ TRANSPORT_NEW_CMD_MAP in order to | |
1711 | * complete setup in TCM process context w/ TFO->new_cmd_map(). | |
1712 | */ | |
1713 | int transport_generic_handle_cdb_map( | |
1714 | struct se_cmd *cmd) | |
1715 | { | |
e3d6f909 | 1716 | if (!cmd->se_lun) { |
c66ac9db | 1717 | dump_stack(); |
6708bb27 | 1718 | pr_err("cmd->se_lun is NULL\n"); |
e3d6f909 | 1719 | return -EINVAL; |
c66ac9db NB |
1720 | } |
1721 | ||
f7a5cc0b | 1722 | transport_add_cmd_to_queue(cmd, TRANSPORT_NEW_CMD_MAP, false); |
c66ac9db NB |
1723 | return 0; |
1724 | } | |
1725 | EXPORT_SYMBOL(transport_generic_handle_cdb_map); | |
1726 | ||
1727 | /* transport_generic_handle_data(): | |
1728 | * | |
1729 | * | |
1730 | */ | |
1731 | int transport_generic_handle_data( | |
1732 | struct se_cmd *cmd) | |
1733 | { | |
1734 | /* | |
1735 | * For the software fabric case, then we assume the nexus is being | |
1736 | * failed/shutdown when signals are pending from the kthread context | |
1737 | * caller, so we return a failure. For the HW target mode case running | |
1738 | * in interrupt code, the signal_pending() check is skipped. | |
1739 | */ | |
1740 | if (!in_interrupt() && signal_pending(current)) | |
e3d6f909 | 1741 | return -EPERM; |
c66ac9db NB |
1742 | /* |
1743 | * If the received CDB has aleady been ABORTED by the generic | |
1744 | * target engine, we now call transport_check_aborted_status() | |
1745 | * to queue any delated TASK_ABORTED status for the received CDB to the | |
25985edc | 1746 | * fabric module as we are expecting no further incoming DATA OUT |
c66ac9db NB |
1747 | * sequences at this point. |
1748 | */ | |
1749 | if (transport_check_aborted_status(cmd, 1) != 0) | |
1750 | return 0; | |
1751 | ||
f7a5cc0b | 1752 | transport_add_cmd_to_queue(cmd, TRANSPORT_PROCESS_WRITE, false); |
c66ac9db NB |
1753 | return 0; |
1754 | } | |
1755 | EXPORT_SYMBOL(transport_generic_handle_data); | |
1756 | ||
1757 | /* transport_generic_handle_tmr(): | |
1758 | * | |
1759 | * | |
1760 | */ | |
1761 | int transport_generic_handle_tmr( | |
1762 | struct se_cmd *cmd) | |
1763 | { | |
f7a5cc0b | 1764 | transport_add_cmd_to_queue(cmd, TRANSPORT_PROCESS_TMR, false); |
c66ac9db NB |
1765 | return 0; |
1766 | } | |
1767 | EXPORT_SYMBOL(transport_generic_handle_tmr); | |
1768 | ||
f4366772 NB |
1769 | void transport_generic_free_cmd_intr( |
1770 | struct se_cmd *cmd) | |
1771 | { | |
f7a5cc0b | 1772 | transport_add_cmd_to_queue(cmd, TRANSPORT_FREE_CMD_INTR, false); |
f4366772 NB |
1773 | } |
1774 | EXPORT_SYMBOL(transport_generic_free_cmd_intr); | |
1775 | ||
cdbb70bb CH |
1776 | /* |
1777 | * If the task is active, request it to be stopped and sleep until it | |
1778 | * has completed. | |
1779 | */ | |
1780 | bool target_stop_task(struct se_task *task, unsigned long *flags) | |
1781 | { | |
1782 | struct se_cmd *cmd = task->task_se_cmd; | |
1783 | bool was_active = false; | |
1784 | ||
1785 | if (task->task_flags & TF_ACTIVE) { | |
1786 | task->task_flags |= TF_REQUEST_STOP; | |
1787 | spin_unlock_irqrestore(&cmd->t_state_lock, *flags); | |
1788 | ||
1789 | pr_debug("Task %p waiting to complete\n", task); | |
cc5d0f0f | 1790 | del_timer_sync(&task->task_timer); |
cdbb70bb CH |
1791 | wait_for_completion(&task->task_stop_comp); |
1792 | pr_debug("Task %p stopped successfully\n", task); | |
1793 | ||
1794 | spin_lock_irqsave(&cmd->t_state_lock, *flags); | |
1795 | atomic_dec(&cmd->t_task_cdbs_left); | |
1796 | task->task_flags &= ~(TF_ACTIVE | TF_REQUEST_STOP); | |
1797 | was_active = true; | |
1798 | } | |
1799 | ||
cdbb70bb CH |
1800 | return was_active; |
1801 | } | |
1802 | ||
c66ac9db NB |
1803 | static int transport_stop_tasks_for_cmd(struct se_cmd *cmd) |
1804 | { | |
1805 | struct se_task *task, *task_tmp; | |
1806 | unsigned long flags; | |
1807 | int ret = 0; | |
1808 | ||
6708bb27 | 1809 | pr_debug("ITT[0x%08x] - Stopping tasks\n", |
e3d6f909 | 1810 | cmd->se_tfo->get_task_tag(cmd)); |
c66ac9db NB |
1811 | |
1812 | /* | |
1813 | * No tasks remain in the execution queue | |
1814 | */ | |
a1d8b49a | 1815 | spin_lock_irqsave(&cmd->t_state_lock, flags); |
c66ac9db | 1816 | list_for_each_entry_safe(task, task_tmp, |
a1d8b49a | 1817 | &cmd->t_task_list, t_list) { |
04629b7b | 1818 | pr_debug("Processing task %p\n", task); |
c66ac9db NB |
1819 | /* |
1820 | * If the struct se_task has not been sent and is not active, | |
1821 | * remove the struct se_task from the execution queue. | |
1822 | */ | |
6c76bf95 | 1823 | if (!(task->task_flags & (TF_ACTIVE | TF_SENT))) { |
a1d8b49a | 1824 | spin_unlock_irqrestore(&cmd->t_state_lock, |
c66ac9db NB |
1825 | flags); |
1826 | transport_remove_task_from_execute_queue(task, | |
42bf829e | 1827 | cmd->se_dev); |
c66ac9db | 1828 | |
04629b7b | 1829 | pr_debug("Task %p removed from execute queue\n", task); |
a1d8b49a | 1830 | spin_lock_irqsave(&cmd->t_state_lock, flags); |
c66ac9db NB |
1831 | continue; |
1832 | } | |
1833 | ||
cdbb70bb | 1834 | if (!target_stop_task(task, &flags)) { |
04629b7b | 1835 | pr_debug("Task %p - did nothing\n", task); |
c66ac9db NB |
1836 | ret++; |
1837 | } | |
c66ac9db | 1838 | } |
a1d8b49a | 1839 | spin_unlock_irqrestore(&cmd->t_state_lock, flags); |
c66ac9db NB |
1840 | |
1841 | return ret; | |
1842 | } | |
1843 | ||
c66ac9db NB |
1844 | /* |
1845 | * Handle SAM-esque emulation for generic transport request failures. | |
1846 | */ | |
1847 | static void transport_generic_request_failure( | |
1848 | struct se_cmd *cmd, | |
c66ac9db NB |
1849 | int complete, |
1850 | int sc) | |
1851 | { | |
07bde79a NB |
1852 | int ret = 0; |
1853 | ||
6708bb27 | 1854 | pr_debug("-----[ Storage Engine Exception for cmd: %p ITT: 0x%08x" |
e3d6f909 | 1855 | " CDB: 0x%02x\n", cmd, cmd->se_tfo->get_task_tag(cmd), |
a1d8b49a | 1856 | cmd->t_task_cdb[0]); |
f2da9dbd | 1857 | pr_debug("-----[ i_state: %d t_state: %d transport_error_status: %d\n", |
e3d6f909 | 1858 | cmd->se_tfo->get_cmd_state(cmd), |
f2da9dbd | 1859 | cmd->t_state, |
c66ac9db | 1860 | cmd->transport_error_status); |
6708bb27 | 1861 | pr_debug("-----[ t_tasks: %d t_task_cdbs_left: %d" |
c66ac9db NB |
1862 | " t_task_cdbs_sent: %d t_task_cdbs_ex_left: %d --" |
1863 | " t_transport_active: %d t_transport_stop: %d" | |
6708bb27 | 1864 | " t_transport_sent: %d\n", cmd->t_task_list_num, |
a1d8b49a AG |
1865 | atomic_read(&cmd->t_task_cdbs_left), |
1866 | atomic_read(&cmd->t_task_cdbs_sent), | |
1867 | atomic_read(&cmd->t_task_cdbs_ex_left), | |
1868 | atomic_read(&cmd->t_transport_active), | |
1869 | atomic_read(&cmd->t_transport_stop), | |
1870 | atomic_read(&cmd->t_transport_sent)); | |
c66ac9db | 1871 | |
c66ac9db NB |
1872 | /* |
1873 | * For SAM Task Attribute emulation for failed struct se_cmd | |
1874 | */ | |
1875 | if (cmd->se_dev->dev_task_attr_type == SAM_TASK_ATTR_EMULATED) | |
1876 | transport_complete_task_attr(cmd); | |
1877 | ||
1878 | if (complete) { | |
1879 | transport_direct_request_timeout(cmd); | |
1880 | cmd->transport_error_status = PYX_TRANSPORT_LU_COMM_FAILURE; | |
1881 | } | |
1882 | ||
1883 | switch (cmd->transport_error_status) { | |
1884 | case PYX_TRANSPORT_UNKNOWN_SAM_OPCODE: | |
1885 | cmd->scsi_sense_reason = TCM_UNSUPPORTED_SCSI_OPCODE; | |
1886 | break; | |
1887 | case PYX_TRANSPORT_REQ_TOO_MANY_SECTORS: | |
1888 | cmd->scsi_sense_reason = TCM_SECTOR_COUNT_TOO_MANY; | |
1889 | break; | |
1890 | case PYX_TRANSPORT_INVALID_CDB_FIELD: | |
1891 | cmd->scsi_sense_reason = TCM_INVALID_CDB_FIELD; | |
1892 | break; | |
1893 | case PYX_TRANSPORT_INVALID_PARAMETER_LIST: | |
1894 | cmd->scsi_sense_reason = TCM_INVALID_PARAMETER_LIST; | |
1895 | break; | |
1896 | case PYX_TRANSPORT_OUT_OF_MEMORY_RESOURCES: | |
1897 | if (!sc) | |
1898 | transport_new_cmd_failure(cmd); | |
1899 | /* | |
1900 | * Currently for PYX_TRANSPORT_OUT_OF_MEMORY_RESOURCES, | |
1901 | * we force this session to fall back to session | |
1902 | * recovery. | |
1903 | */ | |
e3d6f909 AG |
1904 | cmd->se_tfo->fall_back_to_erl0(cmd->se_sess); |
1905 | cmd->se_tfo->stop_session(cmd->se_sess, 0, 0); | |
c66ac9db NB |
1906 | |
1907 | goto check_stop; | |
1908 | case PYX_TRANSPORT_LU_COMM_FAILURE: | |
1909 | case PYX_TRANSPORT_ILLEGAL_REQUEST: | |
1910 | cmd->scsi_sense_reason = TCM_LOGICAL_UNIT_COMMUNICATION_FAILURE; | |
1911 | break; | |
1912 | case PYX_TRANSPORT_UNKNOWN_MODE_PAGE: | |
1913 | cmd->scsi_sense_reason = TCM_UNKNOWN_MODE_PAGE; | |
1914 | break; | |
1915 | case PYX_TRANSPORT_WRITE_PROTECTED: | |
1916 | cmd->scsi_sense_reason = TCM_WRITE_PROTECTED; | |
1917 | break; | |
1918 | case PYX_TRANSPORT_RESERVATION_CONFLICT: | |
1919 | /* | |
1920 | * No SENSE Data payload for this case, set SCSI Status | |
1921 | * and queue the response to $FABRIC_MOD. | |
1922 | * | |
1923 | * Uses linux/include/scsi/scsi.h SAM status codes defs | |
1924 | */ | |
1925 | cmd->scsi_status = SAM_STAT_RESERVATION_CONFLICT; | |
1926 | /* | |
1927 | * For UA Interlock Code 11b, a RESERVATION CONFLICT will | |
1928 | * establish a UNIT ATTENTION with PREVIOUS RESERVATION | |
1929 | * CONFLICT STATUS. | |
1930 | * | |
1931 | * See spc4r17, section 7.4.6 Control Mode Page, Table 349 | |
1932 | */ | |
e3d6f909 AG |
1933 | if (cmd->se_sess && |
1934 | cmd->se_dev->se_sub_dev->se_dev_attrib.emulate_ua_intlck_ctrl == 2) | |
1935 | core_scsi3_ua_allocate(cmd->se_sess->se_node_acl, | |
c66ac9db NB |
1936 | cmd->orig_fe_lun, 0x2C, |
1937 | ASCQ_2CH_PREVIOUS_RESERVATION_CONFLICT_STATUS); | |
1938 | ||
07bde79a NB |
1939 | ret = cmd->se_tfo->queue_status(cmd); |
1940 | if (ret == -EAGAIN) | |
1941 | goto queue_full; | |
c66ac9db NB |
1942 | goto check_stop; |
1943 | case PYX_TRANSPORT_USE_SENSE_REASON: | |
1944 | /* | |
1945 | * struct se_cmd->scsi_sense_reason already set | |
1946 | */ | |
1947 | break; | |
1948 | default: | |
6708bb27 | 1949 | pr_err("Unknown transport error for CDB 0x%02x: %d\n", |
a1d8b49a | 1950 | cmd->t_task_cdb[0], |
c66ac9db NB |
1951 | cmd->transport_error_status); |
1952 | cmd->scsi_sense_reason = TCM_UNSUPPORTED_SCSI_OPCODE; | |
1953 | break; | |
1954 | } | |
16ab8e60 NB |
1955 | /* |
1956 | * If a fabric does not define a cmd->se_tfo->new_cmd_map caller, | |
1957 | * make the call to transport_send_check_condition_and_sense() | |
1958 | * directly. Otherwise expect the fabric to make the call to | |
1959 | * transport_send_check_condition_and_sense() after handling | |
1960 | * possible unsoliticied write data payloads. | |
1961 | */ | |
1962 | if (!sc && !cmd->se_tfo->new_cmd_map) | |
c66ac9db | 1963 | transport_new_cmd_failure(cmd); |
07bde79a NB |
1964 | else { |
1965 | ret = transport_send_check_condition_and_sense(cmd, | |
1966 | cmd->scsi_sense_reason, 0); | |
1967 | if (ret == -EAGAIN) | |
1968 | goto queue_full; | |
1969 | } | |
1970 | ||
c66ac9db NB |
1971 | check_stop: |
1972 | transport_lun_remove_cmd(cmd); | |
6708bb27 | 1973 | if (!transport_cmd_check_stop_to_fabric(cmd)) |
c66ac9db | 1974 | ; |
07bde79a NB |
1975 | return; |
1976 | ||
1977 | queue_full: | |
e057f533 CH |
1978 | cmd->t_state = TRANSPORT_COMPLETE_QF_OK; |
1979 | transport_handle_queue_full(cmd, cmd->se_dev); | |
c66ac9db NB |
1980 | } |
1981 | ||
1982 | static void transport_direct_request_timeout(struct se_cmd *cmd) | |
1983 | { | |
1984 | unsigned long flags; | |
1985 | ||
a1d8b49a | 1986 | spin_lock_irqsave(&cmd->t_state_lock, flags); |
6708bb27 | 1987 | if (!atomic_read(&cmd->t_transport_timeout)) { |
a1d8b49a | 1988 | spin_unlock_irqrestore(&cmd->t_state_lock, flags); |
c66ac9db NB |
1989 | return; |
1990 | } | |
a1d8b49a AG |
1991 | if (atomic_read(&cmd->t_task_cdbs_timeout_left)) { |
1992 | spin_unlock_irqrestore(&cmd->t_state_lock, flags); | |
c66ac9db NB |
1993 | return; |
1994 | } | |
1995 | ||
a1d8b49a AG |
1996 | atomic_sub(atomic_read(&cmd->t_transport_timeout), |
1997 | &cmd->t_se_count); | |
1998 | spin_unlock_irqrestore(&cmd->t_state_lock, flags); | |
c66ac9db NB |
1999 | } |
2000 | ||
c66ac9db NB |
2001 | static inline u32 transport_lba_21(unsigned char *cdb) |
2002 | { | |
2003 | return ((cdb[1] & 0x1f) << 16) | (cdb[2] << 8) | cdb[3]; | |
2004 | } | |
2005 | ||
2006 | static inline u32 transport_lba_32(unsigned char *cdb) | |
2007 | { | |
2008 | return (cdb[2] << 24) | (cdb[3] << 16) | (cdb[4] << 8) | cdb[5]; | |
2009 | } | |
2010 | ||
2011 | static inline unsigned long long transport_lba_64(unsigned char *cdb) | |
2012 | { | |
2013 | unsigned int __v1, __v2; | |
2014 | ||
2015 | __v1 = (cdb[2] << 24) | (cdb[3] << 16) | (cdb[4] << 8) | cdb[5]; | |
2016 | __v2 = (cdb[6] << 24) | (cdb[7] << 16) | (cdb[8] << 8) | cdb[9]; | |
2017 | ||
2018 | return ((unsigned long long)__v2) | (unsigned long long)__v1 << 32; | |
2019 | } | |
2020 | ||
2021 | /* | |
2022 | * For VARIABLE_LENGTH_CDB w/ 32 byte extended CDBs | |
2023 | */ | |
2024 | static inline unsigned long long transport_lba_64_ext(unsigned char *cdb) | |
2025 | { | |
2026 | unsigned int __v1, __v2; | |
2027 | ||
2028 | __v1 = (cdb[12] << 24) | (cdb[13] << 16) | (cdb[14] << 8) | cdb[15]; | |
2029 | __v2 = (cdb[16] << 24) | (cdb[17] << 16) | (cdb[18] << 8) | cdb[19]; | |
2030 | ||
2031 | return ((unsigned long long)__v2) | (unsigned long long)__v1 << 32; | |
2032 | } | |
2033 | ||
2034 | static void transport_set_supported_SAM_opcode(struct se_cmd *se_cmd) | |
2035 | { | |
2036 | unsigned long flags; | |
2037 | ||
a1d8b49a | 2038 | spin_lock_irqsave(&se_cmd->t_state_lock, flags); |
c66ac9db | 2039 | se_cmd->se_cmd_flags |= SCF_SUPPORTED_SAM_OPCODE; |
a1d8b49a | 2040 | spin_unlock_irqrestore(&se_cmd->t_state_lock, flags); |
c66ac9db NB |
2041 | } |
2042 | ||
2043 | /* | |
2044 | * Called from interrupt context. | |
2045 | */ | |
2046 | static void transport_task_timeout_handler(unsigned long data) | |
2047 | { | |
2048 | struct se_task *task = (struct se_task *)data; | |
e3d6f909 | 2049 | struct se_cmd *cmd = task->task_se_cmd; |
c66ac9db NB |
2050 | unsigned long flags; |
2051 | ||
6708bb27 | 2052 | pr_debug("transport task timeout fired! task: %p cmd: %p\n", task, cmd); |
c66ac9db | 2053 | |
a1d8b49a | 2054 | spin_lock_irqsave(&cmd->t_state_lock, flags); |
c66ac9db NB |
2055 | |
2056 | /* | |
2057 | * Determine if transport_complete_task() has already been called. | |
2058 | */ | |
6c76bf95 CH |
2059 | if (!(task->task_flags & TF_ACTIVE)) { |
2060 | pr_debug("transport task: %p cmd: %p timeout !TF_ACTIVE\n", | |
2061 | task, cmd); | |
a1d8b49a | 2062 | spin_unlock_irqrestore(&cmd->t_state_lock, flags); |
c66ac9db NB |
2063 | return; |
2064 | } | |
2065 | ||
a1d8b49a AG |
2066 | atomic_inc(&cmd->t_se_count); |
2067 | atomic_inc(&cmd->t_transport_timeout); | |
2068 | cmd->t_tasks_failed = 1; | |
c66ac9db | 2069 | |
6c76bf95 | 2070 | task->task_flags |= TF_TIMEOUT; |
c66ac9db NB |
2071 | task->task_error_status = PYX_TRANSPORT_TASK_TIMEOUT; |
2072 | task->task_scsi_status = 1; | |
2073 | ||
6c76bf95 CH |
2074 | if (task->task_flags & TF_REQUEST_STOP) { |
2075 | pr_debug("transport task: %p cmd: %p timeout TF_REQUEST_STOP" | |
c66ac9db | 2076 | " == 1\n", task, cmd); |
a1d8b49a | 2077 | spin_unlock_irqrestore(&cmd->t_state_lock, flags); |
c66ac9db NB |
2078 | complete(&task->task_stop_comp); |
2079 | return; | |
2080 | } | |
2081 | ||
6708bb27 AG |
2082 | if (!atomic_dec_and_test(&cmd->t_task_cdbs_left)) { |
2083 | pr_debug("transport task: %p cmd: %p timeout non zero" | |
c66ac9db | 2084 | " t_task_cdbs_left\n", task, cmd); |
a1d8b49a | 2085 | spin_unlock_irqrestore(&cmd->t_state_lock, flags); |
c66ac9db NB |
2086 | return; |
2087 | } | |
6708bb27 | 2088 | pr_debug("transport task: %p cmd: %p timeout ZERO t_task_cdbs_left\n", |
c66ac9db NB |
2089 | task, cmd); |
2090 | ||
35e0e757 CH |
2091 | INIT_WORK(&cmd->work, target_complete_failure_work); |
2092 | cmd->t_state = TRANSPORT_COMPLETE; | |
2093 | atomic_set(&cmd->t_transport_active, 1); | |
a1d8b49a | 2094 | spin_unlock_irqrestore(&cmd->t_state_lock, flags); |
c66ac9db | 2095 | |
35e0e757 | 2096 | queue_work(target_completion_wq, &cmd->work); |
c66ac9db NB |
2097 | } |
2098 | ||
c66ac9db NB |
2099 | static void transport_start_task_timer(struct se_task *task) |
2100 | { | |
42bf829e | 2101 | struct se_device *dev = task->task_se_cmd->se_dev; |
c66ac9db NB |
2102 | int timeout; |
2103 | ||
c66ac9db NB |
2104 | /* |
2105 | * If the task_timeout is disabled, exit now. | |
2106 | */ | |
e3d6f909 | 2107 | timeout = dev->se_sub_dev->se_dev_attrib.task_timeout; |
6708bb27 | 2108 | if (!timeout) |
c66ac9db NB |
2109 | return; |
2110 | ||
c66ac9db NB |
2111 | task->task_timer.expires = (get_jiffies_64() + timeout * HZ); |
2112 | task->task_timer.data = (unsigned long) task; | |
2113 | task->task_timer.function = transport_task_timeout_handler; | |
c66ac9db | 2114 | add_timer(&task->task_timer); |
c66ac9db NB |
2115 | } |
2116 | ||
2117 | static inline int transport_tcq_window_closed(struct se_device *dev) | |
2118 | { | |
2119 | if (dev->dev_tcq_window_closed++ < | |
2120 | PYX_TRANSPORT_WINDOW_CLOSED_THRESHOLD) { | |
2121 | msleep(PYX_TRANSPORT_WINDOW_CLOSED_WAIT_SHORT); | |
2122 | } else | |
2123 | msleep(PYX_TRANSPORT_WINDOW_CLOSED_WAIT_LONG); | |
2124 | ||
e3d6f909 | 2125 | wake_up_interruptible(&dev->dev_queue_obj.thread_wq); |
c66ac9db NB |
2126 | return 0; |
2127 | } | |
2128 | ||
2129 | /* | |
2130 | * Called from Fabric Module context from transport_execute_tasks() | |
2131 | * | |
2132 | * The return of this function determins if the tasks from struct se_cmd | |
2133 | * get added to the execution queue in transport_execute_tasks(), | |
2134 | * or are added to the delayed or ordered lists here. | |
2135 | */ | |
2136 | static inline int transport_execute_task_attr(struct se_cmd *cmd) | |
2137 | { | |
5951146d | 2138 | if (cmd->se_dev->dev_task_attr_type != SAM_TASK_ATTR_EMULATED) |
c66ac9db NB |
2139 | return 1; |
2140 | /* | |
25985edc | 2141 | * Check for the existence of HEAD_OF_QUEUE, and if true return 1 |
c66ac9db NB |
2142 | * to allow the passed struct se_cmd list of tasks to the front of the list. |
2143 | */ | |
e66ecd50 | 2144 | if (cmd->sam_task_attr == MSG_HEAD_TAG) { |
5951146d | 2145 | atomic_inc(&cmd->se_dev->dev_hoq_count); |
c66ac9db | 2146 | smp_mb__after_atomic_inc(); |
6708bb27 | 2147 | pr_debug("Added HEAD_OF_QUEUE for CDB:" |
c66ac9db | 2148 | " 0x%02x, se_ordered_id: %u\n", |
6708bb27 | 2149 | cmd->t_task_cdb[0], |
c66ac9db NB |
2150 | cmd->se_ordered_id); |
2151 | return 1; | |
e66ecd50 | 2152 | } else if (cmd->sam_task_attr == MSG_ORDERED_TAG) { |
5951146d AG |
2153 | spin_lock(&cmd->se_dev->ordered_cmd_lock); |
2154 | list_add_tail(&cmd->se_ordered_node, | |
2155 | &cmd->se_dev->ordered_cmd_list); | |
2156 | spin_unlock(&cmd->se_dev->ordered_cmd_lock); | |
c66ac9db | 2157 | |
5951146d | 2158 | atomic_inc(&cmd->se_dev->dev_ordered_sync); |
c66ac9db NB |
2159 | smp_mb__after_atomic_inc(); |
2160 | ||
6708bb27 | 2161 | pr_debug("Added ORDERED for CDB: 0x%02x to ordered" |
c66ac9db | 2162 | " list, se_ordered_id: %u\n", |
a1d8b49a | 2163 | cmd->t_task_cdb[0], |
c66ac9db NB |
2164 | cmd->se_ordered_id); |
2165 | /* | |
2166 | * Add ORDERED command to tail of execution queue if | |
2167 | * no other older commands exist that need to be | |
2168 | * completed first. | |
2169 | */ | |
6708bb27 | 2170 | if (!atomic_read(&cmd->se_dev->simple_cmds)) |
c66ac9db NB |
2171 | return 1; |
2172 | } else { | |
2173 | /* | |
2174 | * For SIMPLE and UNTAGGED Task Attribute commands | |
2175 | */ | |
5951146d | 2176 | atomic_inc(&cmd->se_dev->simple_cmds); |
c66ac9db NB |
2177 | smp_mb__after_atomic_inc(); |
2178 | } | |
2179 | /* | |
2180 | * Otherwise if one or more outstanding ORDERED task attribute exist, | |
2181 | * add the dormant task(s) built for the passed struct se_cmd to the | |
2182 | * execution queue and become in Active state for this struct se_device. | |
2183 | */ | |
5951146d | 2184 | if (atomic_read(&cmd->se_dev->dev_ordered_sync) != 0) { |
c66ac9db NB |
2185 | /* |
2186 | * Otherwise, add cmd w/ tasks to delayed cmd queue that | |
25985edc | 2187 | * will be drained upon completion of HEAD_OF_QUEUE task. |
c66ac9db | 2188 | */ |
5951146d | 2189 | spin_lock(&cmd->se_dev->delayed_cmd_lock); |
c66ac9db | 2190 | cmd->se_cmd_flags |= SCF_DELAYED_CMD_FROM_SAM_ATTR; |
5951146d AG |
2191 | list_add_tail(&cmd->se_delayed_node, |
2192 | &cmd->se_dev->delayed_cmd_list); | |
2193 | spin_unlock(&cmd->se_dev->delayed_cmd_lock); | |
c66ac9db | 2194 | |
6708bb27 | 2195 | pr_debug("Added CDB: 0x%02x Task Attr: 0x%02x to" |
c66ac9db | 2196 | " delayed CMD list, se_ordered_id: %u\n", |
a1d8b49a | 2197 | cmd->t_task_cdb[0], cmd->sam_task_attr, |
c66ac9db NB |
2198 | cmd->se_ordered_id); |
2199 | /* | |
2200 | * Return zero to let transport_execute_tasks() know | |
2201 | * not to add the delayed tasks to the execution list. | |
2202 | */ | |
2203 | return 0; | |
2204 | } | |
2205 | /* | |
2206 | * Otherwise, no ORDERED task attributes exist.. | |
2207 | */ | |
2208 | return 1; | |
2209 | } | |
2210 | ||
2211 | /* | |
2212 | * Called from fabric module context in transport_generic_new_cmd() and | |
2213 | * transport_generic_process_write() | |
2214 | */ | |
2215 | static int transport_execute_tasks(struct se_cmd *cmd) | |
2216 | { | |
2217 | int add_tasks; | |
2218 | ||
db1620a2 CH |
2219 | if (se_dev_check_online(cmd->se_orig_obj_ptr) != 0) { |
2220 | cmd->transport_error_status = PYX_TRANSPORT_LU_COMM_FAILURE; | |
4499dda8 | 2221 | transport_generic_request_failure(cmd, 0, 1); |
db1620a2 | 2222 | return 0; |
c66ac9db | 2223 | } |
db1620a2 | 2224 | |
c66ac9db NB |
2225 | /* |
2226 | * Call transport_cmd_check_stop() to see if a fabric exception | |
25985edc | 2227 | * has occurred that prevents execution. |
c66ac9db | 2228 | */ |
6708bb27 | 2229 | if (!transport_cmd_check_stop(cmd, 0, TRANSPORT_PROCESSING)) { |
c66ac9db NB |
2230 | /* |
2231 | * Check for SAM Task Attribute emulation and HEAD_OF_QUEUE | |
2232 | * attribute for the tasks of the received struct se_cmd CDB | |
2233 | */ | |
2234 | add_tasks = transport_execute_task_attr(cmd); | |
e3d6f909 | 2235 | if (!add_tasks) |
c66ac9db NB |
2236 | goto execute_tasks; |
2237 | /* | |
2238 | * This calls transport_add_tasks_from_cmd() to handle | |
2239 | * HEAD_OF_QUEUE ordering for SAM Task Attribute emulation | |
2240 | * (if enabled) in __transport_add_task_to_execute_queue() and | |
2241 | * transport_add_task_check_sam_attr(). | |
2242 | */ | |
2243 | transport_add_tasks_from_cmd(cmd); | |
2244 | } | |
2245 | /* | |
2246 | * Kick the execution queue for the cmd associated struct se_device | |
2247 | * storage object. | |
2248 | */ | |
2249 | execute_tasks: | |
5951146d | 2250 | __transport_execute_tasks(cmd->se_dev); |
c66ac9db NB |
2251 | return 0; |
2252 | } | |
2253 | ||
2254 | /* | |
2255 | * Called to check struct se_device tcq depth window, and once open pull struct se_task | |
2256 | * from struct se_device->execute_task_list and | |
2257 | * | |
2258 | * Called from transport_processing_thread() | |
2259 | */ | |
2260 | static int __transport_execute_tasks(struct se_device *dev) | |
2261 | { | |
2262 | int error; | |
2263 | struct se_cmd *cmd = NULL; | |
e3d6f909 | 2264 | struct se_task *task = NULL; |
c66ac9db NB |
2265 | unsigned long flags; |
2266 | ||
2267 | /* | |
2268 | * Check if there is enough room in the device and HBA queue to send | |
a1d8b49a | 2269 | * struct se_tasks to the selected transport. |
c66ac9db NB |
2270 | */ |
2271 | check_depth: | |
e3d6f909 | 2272 | if (!atomic_read(&dev->depth_left)) |
c66ac9db | 2273 | return transport_tcq_window_closed(dev); |
c66ac9db | 2274 | |
e3d6f909 | 2275 | dev->dev_tcq_window_closed = 0; |
c66ac9db | 2276 | |
e3d6f909 AG |
2277 | spin_lock_irq(&dev->execute_task_lock); |
2278 | if (list_empty(&dev->execute_task_list)) { | |
2279 | spin_unlock_irq(&dev->execute_task_lock); | |
c66ac9db NB |
2280 | return 0; |
2281 | } | |
e3d6f909 AG |
2282 | task = list_first_entry(&dev->execute_task_list, |
2283 | struct se_task, t_execute_list); | |
04629b7b | 2284 | __transport_remove_task_from_execute_queue(task, dev); |
e3d6f909 | 2285 | spin_unlock_irq(&dev->execute_task_lock); |
c66ac9db NB |
2286 | |
2287 | atomic_dec(&dev->depth_left); | |
c66ac9db | 2288 | |
e3d6f909 | 2289 | cmd = task->task_se_cmd; |
c66ac9db | 2290 | |
a1d8b49a | 2291 | spin_lock_irqsave(&cmd->t_state_lock, flags); |
6c76bf95 | 2292 | task->task_flags |= (TF_ACTIVE | TF_SENT); |
a1d8b49a | 2293 | atomic_inc(&cmd->t_task_cdbs_sent); |
c66ac9db | 2294 | |
a1d8b49a AG |
2295 | if (atomic_read(&cmd->t_task_cdbs_sent) == |
2296 | cmd->t_task_list_num) | |
c66ac9db NB |
2297 | atomic_set(&cmd->transport_sent, 1); |
2298 | ||
2299 | transport_start_task_timer(task); | |
a1d8b49a | 2300 | spin_unlock_irqrestore(&cmd->t_state_lock, flags); |
c66ac9db NB |
2301 | /* |
2302 | * The struct se_cmd->transport_emulate_cdb() function pointer is used | |
e3d6f909 | 2303 | * to grab REPORT_LUNS and other CDBs we want to handle before they hit the |
c66ac9db NB |
2304 | * struct se_subsystem_api->do_task() caller below. |
2305 | */ | |
2306 | if (cmd->transport_emulate_cdb) { | |
2307 | error = cmd->transport_emulate_cdb(cmd); | |
2308 | if (error != 0) { | |
2309 | cmd->transport_error_status = error; | |
6c76bf95 CH |
2310 | spin_lock_irqsave(&cmd->t_state_lock, flags); |
2311 | task->task_flags &= ~TF_ACTIVE; | |
2312 | spin_unlock_irqrestore(&cmd->t_state_lock, flags); | |
cc5d0f0f | 2313 | del_timer_sync(&task->task_timer); |
c66ac9db NB |
2314 | atomic_set(&cmd->transport_sent, 0); |
2315 | transport_stop_tasks_for_cmd(cmd); | |
4499dda8 CH |
2316 | atomic_inc(&dev->depth_left); |
2317 | transport_generic_request_failure(cmd, 0, 1); | |
c66ac9db NB |
2318 | goto check_depth; |
2319 | } | |
2320 | /* | |
2321 | * Handle the successful completion for transport_emulate_cdb() | |
2322 | * for synchronous operation, following SCF_EMULATE_CDB_ASYNC | |
2323 | * Otherwise the caller is expected to complete the task with | |
2324 | * proper status. | |
2325 | */ | |
2326 | if (!(cmd->se_cmd_flags & SCF_EMULATE_CDB_ASYNC)) { | |
2327 | cmd->scsi_status = SAM_STAT_GOOD; | |
2328 | task->task_scsi_status = GOOD; | |
2329 | transport_complete_task(task, 1); | |
2330 | } | |
2331 | } else { | |
2332 | /* | |
2333 | * Currently for all virtual TCM plugins including IBLOCK, FILEIO and | |
2334 | * RAMDISK we use the internal transport_emulate_control_cdb() logic | |
2335 | * with struct se_subsystem_api callers for the primary SPC-3 TYPE_DISK | |
2336 | * LUN emulation code. | |
2337 | * | |
2338 | * For TCM/pSCSI and all other SCF_SCSI_DATA_SG_IO_CDB I/O tasks we | |
2339 | * call ->do_task() directly and let the underlying TCM subsystem plugin | |
2340 | * code handle the CDB emulation. | |
2341 | */ | |
e3d6f909 AG |
2342 | if ((dev->transport->transport_type != TRANSPORT_PLUGIN_PHBA_PDEV) && |
2343 | (!(task->task_se_cmd->se_cmd_flags & SCF_SCSI_DATA_SG_IO_CDB))) | |
c66ac9db NB |
2344 | error = transport_emulate_control_cdb(task); |
2345 | else | |
e3d6f909 | 2346 | error = dev->transport->do_task(task); |
c66ac9db NB |
2347 | |
2348 | if (error != 0) { | |
2349 | cmd->transport_error_status = error; | |
6c76bf95 CH |
2350 | spin_lock_irqsave(&cmd->t_state_lock, flags); |
2351 | task->task_flags &= ~TF_ACTIVE; | |
2352 | spin_unlock_irqrestore(&cmd->t_state_lock, flags); | |
cc5d0f0f | 2353 | del_timer_sync(&task->task_timer); |
c66ac9db NB |
2354 | atomic_set(&cmd->transport_sent, 0); |
2355 | transport_stop_tasks_for_cmd(cmd); | |
4499dda8 CH |
2356 | atomic_inc(&dev->depth_left); |
2357 | transport_generic_request_failure(cmd, 0, 1); | |
c66ac9db NB |
2358 | } |
2359 | } | |
2360 | ||
2361 | goto check_depth; | |
2362 | ||
2363 | return 0; | |
2364 | } | |
2365 | ||
2366 | void transport_new_cmd_failure(struct se_cmd *se_cmd) | |
2367 | { | |
2368 | unsigned long flags; | |
2369 | /* | |
2370 | * Any unsolicited data will get dumped for failed command inside of | |
2371 | * the fabric plugin | |
2372 | */ | |
a1d8b49a | 2373 | spin_lock_irqsave(&se_cmd->t_state_lock, flags); |
c66ac9db NB |
2374 | se_cmd->se_cmd_flags |= SCF_SE_CMD_FAILED; |
2375 | se_cmd->se_cmd_flags |= SCF_SCSI_CDB_EXCEPTION; | |
a1d8b49a | 2376 | spin_unlock_irqrestore(&se_cmd->t_state_lock, flags); |
c66ac9db NB |
2377 | } |
2378 | ||
c66ac9db NB |
2379 | static inline u32 transport_get_sectors_6( |
2380 | unsigned char *cdb, | |
2381 | struct se_cmd *cmd, | |
2382 | int *ret) | |
2383 | { | |
5951146d | 2384 | struct se_device *dev = cmd->se_dev; |
c66ac9db NB |
2385 | |
2386 | /* | |
2387 | * Assume TYPE_DISK for non struct se_device objects. | |
2388 | * Use 8-bit sector value. | |
2389 | */ | |
2390 | if (!dev) | |
2391 | goto type_disk; | |
2392 | ||
2393 | /* | |
2394 | * Use 24-bit allocation length for TYPE_TAPE. | |
2395 | */ | |
e3d6f909 | 2396 | if (dev->transport->get_device_type(dev) == TYPE_TAPE) |
c66ac9db NB |
2397 | return (u32)(cdb[2] << 16) + (cdb[3] << 8) + cdb[4]; |
2398 | ||
2399 | /* | |
2400 | * Everything else assume TYPE_DISK Sector CDB location. | |
2401 | * Use 8-bit sector value. | |
2402 | */ | |
2403 | type_disk: | |
2404 | return (u32)cdb[4]; | |
2405 | } | |
2406 | ||
2407 | static inline u32 transport_get_sectors_10( | |
2408 | unsigned char *cdb, | |
2409 | struct se_cmd *cmd, | |
2410 | int *ret) | |
2411 | { | |
5951146d | 2412 | struct se_device *dev = cmd->se_dev; |
c66ac9db NB |
2413 | |
2414 | /* | |
2415 | * Assume TYPE_DISK for non struct se_device objects. | |
2416 | * Use 16-bit sector value. | |
2417 | */ | |
2418 | if (!dev) | |
2419 | goto type_disk; | |
2420 | ||
2421 | /* | |
2422 | * XXX_10 is not defined in SSC, throw an exception | |
2423 | */ | |
e3d6f909 AG |
2424 | if (dev->transport->get_device_type(dev) == TYPE_TAPE) { |
2425 | *ret = -EINVAL; | |
c66ac9db NB |
2426 | return 0; |
2427 | } | |
2428 | ||
2429 | /* | |
2430 | * Everything else assume TYPE_DISK Sector CDB location. | |
2431 | * Use 16-bit sector value. | |
2432 | */ | |
2433 | type_disk: | |
2434 | return (u32)(cdb[7] << 8) + cdb[8]; | |
2435 | } | |
2436 | ||
2437 | static inline u32 transport_get_sectors_12( | |
2438 | unsigned char *cdb, | |
2439 | struct se_cmd *cmd, | |
2440 | int *ret) | |
2441 | { | |
5951146d | 2442 | struct se_device *dev = cmd->se_dev; |
c66ac9db NB |
2443 | |
2444 | /* | |
2445 | * Assume TYPE_DISK for non struct se_device objects. | |
2446 | * Use 32-bit sector value. | |
2447 | */ | |
2448 | if (!dev) | |
2449 | goto type_disk; | |
2450 | ||
2451 | /* | |
2452 | * XXX_12 is not defined in SSC, throw an exception | |
2453 | */ | |
e3d6f909 AG |
2454 | if (dev->transport->get_device_type(dev) == TYPE_TAPE) { |
2455 | *ret = -EINVAL; | |
c66ac9db NB |
2456 | return 0; |
2457 | } | |
2458 | ||
2459 | /* | |
2460 | * Everything else assume TYPE_DISK Sector CDB location. | |
2461 | * Use 32-bit sector value. | |
2462 | */ | |
2463 | type_disk: | |
2464 | return (u32)(cdb[6] << 24) + (cdb[7] << 16) + (cdb[8] << 8) + cdb[9]; | |
2465 | } | |
2466 | ||
2467 | static inline u32 transport_get_sectors_16( | |
2468 | unsigned char *cdb, | |
2469 | struct se_cmd *cmd, | |
2470 | int *ret) | |
2471 | { | |
5951146d | 2472 | struct se_device *dev = cmd->se_dev; |
c66ac9db NB |
2473 | |
2474 | /* | |
2475 | * Assume TYPE_DISK for non struct se_device objects. | |
2476 | * Use 32-bit sector value. | |
2477 | */ | |
2478 | if (!dev) | |
2479 | goto type_disk; | |
2480 | ||
2481 | /* | |
2482 | * Use 24-bit allocation length for TYPE_TAPE. | |
2483 | */ | |
e3d6f909 | 2484 | if (dev->transport->get_device_type(dev) == TYPE_TAPE) |
c66ac9db NB |
2485 | return (u32)(cdb[12] << 16) + (cdb[13] << 8) + cdb[14]; |
2486 | ||
2487 | type_disk: | |
2488 | return (u32)(cdb[10] << 24) + (cdb[11] << 16) + | |
2489 | (cdb[12] << 8) + cdb[13]; | |
2490 | } | |
2491 | ||
2492 | /* | |
2493 | * Used for VARIABLE_LENGTH_CDB WRITE_32 and READ_32 variants | |
2494 | */ | |
2495 | static inline u32 transport_get_sectors_32( | |
2496 | unsigned char *cdb, | |
2497 | struct se_cmd *cmd, | |
2498 | int *ret) | |
2499 | { | |
2500 | /* | |
2501 | * Assume TYPE_DISK for non struct se_device objects. | |
2502 | * Use 32-bit sector value. | |
2503 | */ | |
2504 | return (u32)(cdb[28] << 24) + (cdb[29] << 16) + | |
2505 | (cdb[30] << 8) + cdb[31]; | |
2506 | ||
2507 | } | |
2508 | ||
2509 | static inline u32 transport_get_size( | |
2510 | u32 sectors, | |
2511 | unsigned char *cdb, | |
2512 | struct se_cmd *cmd) | |
2513 | { | |
5951146d | 2514 | struct se_device *dev = cmd->se_dev; |
c66ac9db | 2515 | |
e3d6f909 | 2516 | if (dev->transport->get_device_type(dev) == TYPE_TAPE) { |
c66ac9db | 2517 | if (cdb[1] & 1) { /* sectors */ |
e3d6f909 | 2518 | return dev->se_sub_dev->se_dev_attrib.block_size * sectors; |
c66ac9db NB |
2519 | } else /* bytes */ |
2520 | return sectors; | |
2521 | } | |
2522 | #if 0 | |
6708bb27 | 2523 | pr_debug("Returning block_size: %u, sectors: %u == %u for" |
e3d6f909 AG |
2524 | " %s object\n", dev->se_sub_dev->se_dev_attrib.block_size, sectors, |
2525 | dev->se_sub_dev->se_dev_attrib.block_size * sectors, | |
2526 | dev->transport->name); | |
c66ac9db | 2527 | #endif |
e3d6f909 | 2528 | return dev->se_sub_dev->se_dev_attrib.block_size * sectors; |
c66ac9db NB |
2529 | } |
2530 | ||
c66ac9db NB |
2531 | static void transport_xor_callback(struct se_cmd *cmd) |
2532 | { | |
2533 | unsigned char *buf, *addr; | |
ec98f782 | 2534 | struct scatterlist *sg; |
c66ac9db NB |
2535 | unsigned int offset; |
2536 | int i; | |
ec98f782 | 2537 | int count; |
c66ac9db NB |
2538 | /* |
2539 | * From sbc3r22.pdf section 5.48 XDWRITEREAD (10) command | |
2540 | * | |
2541 | * 1) read the specified logical block(s); | |
2542 | * 2) transfer logical blocks from the data-out buffer; | |
2543 | * 3) XOR the logical blocks transferred from the data-out buffer with | |
2544 | * the logical blocks read, storing the resulting XOR data in a buffer; | |
2545 | * 4) if the DISABLE WRITE bit is set to zero, then write the logical | |
2546 | * blocks transferred from the data-out buffer; and | |
2547 | * 5) transfer the resulting XOR data to the data-in buffer. | |
2548 | */ | |
2549 | buf = kmalloc(cmd->data_length, GFP_KERNEL); | |
6708bb27 AG |
2550 | if (!buf) { |
2551 | pr_err("Unable to allocate xor_callback buf\n"); | |
c66ac9db NB |
2552 | return; |
2553 | } | |
2554 | /* | |
ec98f782 | 2555 | * Copy the scatterlist WRITE buffer located at cmd->t_data_sg |
c66ac9db NB |
2556 | * into the locally allocated *buf |
2557 | */ | |
ec98f782 AG |
2558 | sg_copy_to_buffer(cmd->t_data_sg, |
2559 | cmd->t_data_nents, | |
2560 | buf, | |
2561 | cmd->data_length); | |
2562 | ||
c66ac9db NB |
2563 | /* |
2564 | * Now perform the XOR against the BIDI read memory located at | |
a1d8b49a | 2565 | * cmd->t_mem_bidi_list |
c66ac9db NB |
2566 | */ |
2567 | ||
2568 | offset = 0; | |
ec98f782 AG |
2569 | for_each_sg(cmd->t_bidi_data_sg, sg, cmd->t_bidi_data_nents, count) { |
2570 | addr = kmap_atomic(sg_page(sg), KM_USER0); | |
2571 | if (!addr) | |
c66ac9db NB |
2572 | goto out; |
2573 | ||
ec98f782 AG |
2574 | for (i = 0; i < sg->length; i++) |
2575 | *(addr + sg->offset + i) ^= *(buf + offset + i); | |
c66ac9db | 2576 | |
ec98f782 | 2577 | offset += sg->length; |
c66ac9db NB |
2578 | kunmap_atomic(addr, KM_USER0); |
2579 | } | |
ec98f782 | 2580 | |
c66ac9db NB |
2581 | out: |
2582 | kfree(buf); | |
2583 | } | |
2584 | ||
2585 | /* | |
2586 | * Used to obtain Sense Data from underlying Linux/SCSI struct scsi_cmnd | |
2587 | */ | |
2588 | static int transport_get_sense_data(struct se_cmd *cmd) | |
2589 | { | |
2590 | unsigned char *buffer = cmd->sense_buffer, *sense_buffer = NULL; | |
42bf829e | 2591 | struct se_device *dev = cmd->se_dev; |
c66ac9db NB |
2592 | struct se_task *task = NULL, *task_tmp; |
2593 | unsigned long flags; | |
2594 | u32 offset = 0; | |
2595 | ||
e3d6f909 AG |
2596 | WARN_ON(!cmd->se_lun); |
2597 | ||
42bf829e CH |
2598 | if (!dev) |
2599 | return 0; | |
2600 | ||
a1d8b49a | 2601 | spin_lock_irqsave(&cmd->t_state_lock, flags); |
c66ac9db | 2602 | if (cmd->se_cmd_flags & SCF_SENT_CHECK_CONDITION) { |
a1d8b49a | 2603 | spin_unlock_irqrestore(&cmd->t_state_lock, flags); |
c66ac9db NB |
2604 | return 0; |
2605 | } | |
2606 | ||
2607 | list_for_each_entry_safe(task, task_tmp, | |
a1d8b49a | 2608 | &cmd->t_task_list, t_list) { |
c66ac9db NB |
2609 | if (!task->task_sense) |
2610 | continue; | |
2611 | ||
e3d6f909 | 2612 | if (!dev->transport->get_sense_buffer) { |
6708bb27 | 2613 | pr_err("dev->transport->get_sense_buffer" |
c66ac9db NB |
2614 | " is NULL\n"); |
2615 | continue; | |
2616 | } | |
2617 | ||
e3d6f909 | 2618 | sense_buffer = dev->transport->get_sense_buffer(task); |
6708bb27 | 2619 | if (!sense_buffer) { |
04629b7b | 2620 | pr_err("ITT[0x%08x]_TASK[%p]: Unable to locate" |
c66ac9db | 2621 | " sense buffer for task with sense\n", |
04629b7b | 2622 | cmd->se_tfo->get_task_tag(cmd), task); |
c66ac9db NB |
2623 | continue; |
2624 | } | |
a1d8b49a | 2625 | spin_unlock_irqrestore(&cmd->t_state_lock, flags); |
c66ac9db | 2626 | |
e3d6f909 | 2627 | offset = cmd->se_tfo->set_fabric_sense_len(cmd, |
c66ac9db NB |
2628 | TRANSPORT_SENSE_BUFFER); |
2629 | ||
5951146d | 2630 | memcpy(&buffer[offset], sense_buffer, |
c66ac9db NB |
2631 | TRANSPORT_SENSE_BUFFER); |
2632 | cmd->scsi_status = task->task_scsi_status; | |
2633 | /* Automatically padded */ | |
2634 | cmd->scsi_sense_length = | |
2635 | (TRANSPORT_SENSE_BUFFER + offset); | |
2636 | ||
6708bb27 | 2637 | pr_debug("HBA_[%u]_PLUG[%s]: Set SAM STATUS: 0x%02x" |
c66ac9db | 2638 | " and sense\n", |
e3d6f909 | 2639 | dev->se_hba->hba_id, dev->transport->name, |
c66ac9db NB |
2640 | cmd->scsi_status); |
2641 | return 0; | |
2642 | } | |
a1d8b49a | 2643 | spin_unlock_irqrestore(&cmd->t_state_lock, flags); |
c66ac9db NB |
2644 | |
2645 | return -1; | |
2646 | } | |
2647 | ||
c66ac9db NB |
2648 | static int |
2649 | transport_handle_reservation_conflict(struct se_cmd *cmd) | |
2650 | { | |
c66ac9db NB |
2651 | cmd->se_cmd_flags |= SCF_SCSI_CDB_EXCEPTION; |
2652 | cmd->se_cmd_flags |= SCF_SCSI_RESERVATION_CONFLICT; | |
2653 | cmd->scsi_status = SAM_STAT_RESERVATION_CONFLICT; | |
2654 | /* | |
2655 | * For UA Interlock Code 11b, a RESERVATION CONFLICT will | |
2656 | * establish a UNIT ATTENTION with PREVIOUS RESERVATION | |
2657 | * CONFLICT STATUS. | |
2658 | * | |
2659 | * See spc4r17, section 7.4.6 Control Mode Page, Table 349 | |
2660 | */ | |
e3d6f909 AG |
2661 | if (cmd->se_sess && |
2662 | cmd->se_dev->se_sub_dev->se_dev_attrib.emulate_ua_intlck_ctrl == 2) | |
2663 | core_scsi3_ua_allocate(cmd->se_sess->se_node_acl, | |
c66ac9db NB |
2664 | cmd->orig_fe_lun, 0x2C, |
2665 | ASCQ_2CH_PREVIOUS_RESERVATION_CONFLICT_STATUS); | |
5951146d | 2666 | return -EINVAL; |
c66ac9db NB |
2667 | } |
2668 | ||
ec98f782 AG |
2669 | static inline long long transport_dev_end_lba(struct se_device *dev) |
2670 | { | |
2671 | return dev->transport->get_blocks(dev) + 1; | |
2672 | } | |
2673 | ||
2674 | static int transport_cmd_get_valid_sectors(struct se_cmd *cmd) | |
2675 | { | |
2676 | struct se_device *dev = cmd->se_dev; | |
2677 | u32 sectors; | |
2678 | ||
2679 | if (dev->transport->get_device_type(dev) != TYPE_DISK) | |
2680 | return 0; | |
2681 | ||
2682 | sectors = (cmd->data_length / dev->se_sub_dev->se_dev_attrib.block_size); | |
2683 | ||
6708bb27 AG |
2684 | if ((cmd->t_task_lba + sectors) > transport_dev_end_lba(dev)) { |
2685 | pr_err("LBA: %llu Sectors: %u exceeds" | |
ec98f782 AG |
2686 | " transport_dev_end_lba(): %llu\n", |
2687 | cmd->t_task_lba, sectors, | |
2688 | transport_dev_end_lba(dev)); | |
7abbe7f3 | 2689 | return -EINVAL; |
ec98f782 AG |
2690 | } |
2691 | ||
7abbe7f3 | 2692 | return 0; |
ec98f782 AG |
2693 | } |
2694 | ||
706d5860 NB |
2695 | static int target_check_write_same_discard(unsigned char *flags, struct se_device *dev) |
2696 | { | |
2697 | /* | |
2698 | * Determine if the received WRITE_SAME is used to for direct | |
2699 | * passthrough into Linux/SCSI with struct request via TCM/pSCSI | |
2700 | * or we are signaling the use of internal WRITE_SAME + UNMAP=1 | |
2701 | * emulation for -> Linux/BLOCK disbard with TCM/IBLOCK code. | |
2702 | */ | |
2703 | int passthrough = (dev->transport->transport_type == | |
2704 | TRANSPORT_PLUGIN_PHBA_PDEV); | |
2705 | ||
2706 | if (!passthrough) { | |
2707 | if ((flags[0] & 0x04) || (flags[0] & 0x02)) { | |
2708 | pr_err("WRITE_SAME PBDATA and LBDATA" | |
2709 | " bits not supported for Block Discard" | |
2710 | " Emulation\n"); | |
2711 | return -ENOSYS; | |
2712 | } | |
2713 | /* | |
2714 | * Currently for the emulated case we only accept | |
2715 | * tpws with the UNMAP=1 bit set. | |
2716 | */ | |
2717 | if (!(flags[0] & 0x08)) { | |
2718 | pr_err("WRITE_SAME w/o UNMAP bit not" | |
2719 | " supported for Block Discard Emulation\n"); | |
2720 | return -ENOSYS; | |
2721 | } | |
2722 | } | |
2723 | ||
2724 | return 0; | |
2725 | } | |
2726 | ||
c66ac9db NB |
2727 | /* transport_generic_cmd_sequencer(): |
2728 | * | |
2729 | * Generic Command Sequencer that should work for most DAS transport | |
2730 | * drivers. | |
2731 | * | |
2732 | * Called from transport_generic_allocate_tasks() in the $FABRIC_MOD | |
2733 | * RX Thread. | |
2734 | * | |
2735 | * FIXME: Need to support other SCSI OPCODES where as well. | |
2736 | */ | |
2737 | static int transport_generic_cmd_sequencer( | |
2738 | struct se_cmd *cmd, | |
2739 | unsigned char *cdb) | |
2740 | { | |
5951146d | 2741 | struct se_device *dev = cmd->se_dev; |
c66ac9db NB |
2742 | struct se_subsystem_dev *su_dev = dev->se_sub_dev; |
2743 | int ret = 0, sector_ret = 0, passthrough; | |
2744 | u32 sectors = 0, size = 0, pr_reg_type = 0; | |
2745 | u16 service_action; | |
2746 | u8 alua_ascq = 0; | |
2747 | /* | |
2748 | * Check for an existing UNIT ATTENTION condition | |
2749 | */ | |
2750 | if (core_scsi3_ua_check(cmd, cdb) < 0) { | |
c66ac9db NB |
2751 | cmd->se_cmd_flags |= SCF_SCSI_CDB_EXCEPTION; |
2752 | cmd->scsi_sense_reason = TCM_CHECK_CONDITION_UNIT_ATTENTION; | |
5951146d | 2753 | return -EINVAL; |
c66ac9db NB |
2754 | } |
2755 | /* | |
2756 | * Check status of Asymmetric Logical Unit Assignment port | |
2757 | */ | |
e3d6f909 | 2758 | ret = su_dev->t10_alua.alua_state_check(cmd, cdb, &alua_ascq); |
c66ac9db | 2759 | if (ret != 0) { |
c66ac9db | 2760 | /* |
25985edc | 2761 | * Set SCSI additional sense code (ASC) to 'LUN Not Accessible'; |
c66ac9db NB |
2762 | * The ALUA additional sense code qualifier (ASCQ) is determined |
2763 | * by the ALUA primary or secondary access state.. | |
2764 | */ | |
2765 | if (ret > 0) { | |
2766 | #if 0 | |
6708bb27 | 2767 | pr_debug("[%s]: ALUA TG Port not available," |
c66ac9db | 2768 | " SenseKey: NOT_READY, ASC/ASCQ: 0x04/0x%02x\n", |
e3d6f909 | 2769 | cmd->se_tfo->get_fabric_name(), alua_ascq); |
c66ac9db NB |
2770 | #endif |
2771 | transport_set_sense_codes(cmd, 0x04, alua_ascq); | |
2772 | cmd->se_cmd_flags |= SCF_SCSI_CDB_EXCEPTION; | |
2773 | cmd->scsi_sense_reason = TCM_CHECK_CONDITION_NOT_READY; | |
5951146d | 2774 | return -EINVAL; |
c66ac9db NB |
2775 | } |
2776 | goto out_invalid_cdb_field; | |
2777 | } | |
2778 | /* | |
2779 | * Check status for SPC-3 Persistent Reservations | |
2780 | */ | |
e3d6f909 AG |
2781 | if (su_dev->t10_pr.pr_ops.t10_reservation_check(cmd, &pr_reg_type) != 0) { |
2782 | if (su_dev->t10_pr.pr_ops.t10_seq_non_holder( | |
c66ac9db NB |
2783 | cmd, cdb, pr_reg_type) != 0) |
2784 | return transport_handle_reservation_conflict(cmd); | |
2785 | /* | |
2786 | * This means the CDB is allowed for the SCSI Initiator port | |
2787 | * when said port is *NOT* holding the legacy SPC-2 or | |
2788 | * SPC-3 Persistent Reservation. | |
2789 | */ | |
2790 | } | |
2791 | ||
2792 | switch (cdb[0]) { | |
2793 | case READ_6: | |
2794 | sectors = transport_get_sectors_6(cdb, cmd, §or_ret); | |
2795 | if (sector_ret) | |
2796 | goto out_unsupported_cdb; | |
2797 | size = transport_get_size(sectors, cdb, cmd); | |
a1d8b49a | 2798 | cmd->t_task_lba = transport_lba_21(cdb); |
c66ac9db NB |
2799 | cmd->se_cmd_flags |= SCF_SCSI_DATA_SG_IO_CDB; |
2800 | break; | |
2801 | case READ_10: | |
2802 | sectors = transport_get_sectors_10(cdb, cmd, §or_ret); | |
2803 | if (sector_ret) | |
2804 | goto out_unsupported_cdb; | |
2805 | size = transport_get_size(sectors, cdb, cmd); | |
a1d8b49a | 2806 | cmd->t_task_lba = transport_lba_32(cdb); |
c66ac9db NB |
2807 | cmd->se_cmd_flags |= SCF_SCSI_DATA_SG_IO_CDB; |
2808 | break; | |
2809 | case READ_12: | |
2810 | sectors = transport_get_sectors_12(cdb, cmd, §or_ret); | |
2811 | if (sector_ret) | |
2812 | goto out_unsupported_cdb; | |
2813 | size = transport_get_size(sectors, cdb, cmd); | |
a1d8b49a | 2814 | cmd->t_task_lba = transport_lba_32(cdb); |
c66ac9db NB |
2815 | cmd->se_cmd_flags |= SCF_SCSI_DATA_SG_IO_CDB; |
2816 | break; | |
2817 | case READ_16: | |
2818 | sectors = transport_get_sectors_16(cdb, cmd, §or_ret); | |
2819 | if (sector_ret) | |
2820 | goto out_unsupported_cdb; | |
2821 | size = transport_get_size(sectors, cdb, cmd); | |
a1d8b49a | 2822 | cmd->t_task_lba = transport_lba_64(cdb); |
c66ac9db NB |
2823 | cmd->se_cmd_flags |= SCF_SCSI_DATA_SG_IO_CDB; |
2824 | break; | |
2825 | case WRITE_6: | |
2826 | sectors = transport_get_sectors_6(cdb, cmd, §or_ret); | |
2827 | if (sector_ret) | |
2828 | goto out_unsupported_cdb; | |
2829 | size = transport_get_size(sectors, cdb, cmd); | |
a1d8b49a | 2830 | cmd->t_task_lba = transport_lba_21(cdb); |
c66ac9db NB |
2831 | cmd->se_cmd_flags |= SCF_SCSI_DATA_SG_IO_CDB; |
2832 | break; | |
2833 | case WRITE_10: | |
2834 | sectors = transport_get_sectors_10(cdb, cmd, §or_ret); | |
2835 | if (sector_ret) | |
2836 | goto out_unsupported_cdb; | |
2837 | size = transport_get_size(sectors, cdb, cmd); | |
a1d8b49a AG |
2838 | cmd->t_task_lba = transport_lba_32(cdb); |
2839 | cmd->t_tasks_fua = (cdb[1] & 0x8); | |
c66ac9db NB |
2840 | cmd->se_cmd_flags |= SCF_SCSI_DATA_SG_IO_CDB; |
2841 | break; | |
2842 | case WRITE_12: | |
2843 | sectors = transport_get_sectors_12(cdb, cmd, §or_ret); | |
2844 | if (sector_ret) | |
2845 | goto out_unsupported_cdb; | |
2846 | size = transport_get_size(sectors, cdb, cmd); | |
a1d8b49a AG |
2847 | cmd->t_task_lba = transport_lba_32(cdb); |
2848 | cmd->t_tasks_fua = (cdb[1] & 0x8); | |
c66ac9db NB |
2849 | cmd->se_cmd_flags |= SCF_SCSI_DATA_SG_IO_CDB; |
2850 | break; | |
2851 | case WRITE_16: | |
2852 | sectors = transport_get_sectors_16(cdb, cmd, §or_ret); | |
2853 | if (sector_ret) | |
2854 | goto out_unsupported_cdb; | |
2855 | size = transport_get_size(sectors, cdb, cmd); | |
a1d8b49a AG |
2856 | cmd->t_task_lba = transport_lba_64(cdb); |
2857 | cmd->t_tasks_fua = (cdb[1] & 0x8); | |
c66ac9db NB |
2858 | cmd->se_cmd_flags |= SCF_SCSI_DATA_SG_IO_CDB; |
2859 | break; | |
2860 | case XDWRITEREAD_10: | |
2861 | if ((cmd->data_direction != DMA_TO_DEVICE) || | |
a1d8b49a | 2862 | !(cmd->t_tasks_bidi)) |
c66ac9db NB |
2863 | goto out_invalid_cdb_field; |
2864 | sectors = transport_get_sectors_10(cdb, cmd, §or_ret); | |
2865 | if (sector_ret) | |
2866 | goto out_unsupported_cdb; | |
2867 | size = transport_get_size(sectors, cdb, cmd); | |
a1d8b49a | 2868 | cmd->t_task_lba = transport_lba_32(cdb); |
c66ac9db | 2869 | cmd->se_cmd_flags |= SCF_SCSI_DATA_SG_IO_CDB; |
7c1c6af3 CH |
2870 | |
2871 | if (dev->transport->transport_type == | |
2872 | TRANSPORT_PLUGIN_PHBA_PDEV) | |
2873 | goto out_unsupported_cdb; | |
c66ac9db | 2874 | /* |
35e0e757 | 2875 | * Setup BIDI XOR callback to be run after I/O completion. |
c66ac9db NB |
2876 | */ |
2877 | cmd->transport_complete_callback = &transport_xor_callback; | |
a1d8b49a | 2878 | cmd->t_tasks_fua = (cdb[1] & 0x8); |
c66ac9db NB |
2879 | break; |
2880 | case VARIABLE_LENGTH_CMD: | |
2881 | service_action = get_unaligned_be16(&cdb[8]); | |
2882 | /* | |
2883 | * Determine if this is TCM/PSCSI device and we should disable | |
2884 | * internal emulation for this CDB. | |
2885 | */ | |
e3d6f909 | 2886 | passthrough = (dev->transport->transport_type == |
c66ac9db NB |
2887 | TRANSPORT_PLUGIN_PHBA_PDEV); |
2888 | ||
2889 | switch (service_action) { | |
2890 | case XDWRITEREAD_32: | |
2891 | sectors = transport_get_sectors_32(cdb, cmd, §or_ret); | |
2892 | if (sector_ret) | |
2893 | goto out_unsupported_cdb; | |
2894 | size = transport_get_size(sectors, cdb, cmd); | |
2895 | /* | |
2896 | * Use WRITE_32 and READ_32 opcodes for the emulated | |
2897 | * XDWRITE_READ_32 logic. | |
2898 | */ | |
a1d8b49a | 2899 | cmd->t_task_lba = transport_lba_64_ext(cdb); |
c66ac9db NB |
2900 | cmd->se_cmd_flags |= SCF_SCSI_DATA_SG_IO_CDB; |
2901 | ||
c66ac9db | 2902 | if (passthrough) |
7c1c6af3 | 2903 | goto out_unsupported_cdb; |
c66ac9db | 2904 | /* |
35e0e757 CH |
2905 | * Setup BIDI XOR callback to be run during after I/O |
2906 | * completion. | |
c66ac9db NB |
2907 | */ |
2908 | cmd->transport_complete_callback = &transport_xor_callback; | |
a1d8b49a | 2909 | cmd->t_tasks_fua = (cdb[10] & 0x8); |
c66ac9db NB |
2910 | break; |
2911 | case WRITE_SAME_32: | |
2912 | sectors = transport_get_sectors_32(cdb, cmd, §or_ret); | |
2913 | if (sector_ret) | |
2914 | goto out_unsupported_cdb; | |
dd3a5ad8 | 2915 | |
6708bb27 | 2916 | if (sectors) |
12850626 | 2917 | size = transport_get_size(1, cdb, cmd); |
6708bb27 AG |
2918 | else { |
2919 | pr_err("WSNZ=1, WRITE_SAME w/sectors=0 not" | |
2920 | " supported\n"); | |
2921 | goto out_invalid_cdb_field; | |
2922 | } | |
dd3a5ad8 | 2923 | |
a1d8b49a | 2924 | cmd->t_task_lba = get_unaligned_be64(&cdb[12]); |
c66ac9db NB |
2925 | cmd->se_cmd_flags |= SCF_SCSI_CONTROL_SG_IO_CDB; |
2926 | ||
706d5860 | 2927 | if (target_check_write_same_discard(&cdb[10], dev) < 0) |
c66ac9db | 2928 | goto out_invalid_cdb_field; |
706d5860 | 2929 | |
c66ac9db NB |
2930 | break; |
2931 | default: | |
6708bb27 | 2932 | pr_err("VARIABLE_LENGTH_CMD service action" |
c66ac9db NB |
2933 | " 0x%04x not supported\n", service_action); |
2934 | goto out_unsupported_cdb; | |
2935 | } | |
2936 | break; | |
e434f1f1 | 2937 | case MAINTENANCE_IN: |
e3d6f909 | 2938 | if (dev->transport->get_device_type(dev) != TYPE_ROM) { |
c66ac9db NB |
2939 | /* MAINTENANCE_IN from SCC-2 */ |
2940 | /* | |
2941 | * Check for emulated MI_REPORT_TARGET_PGS. | |
2942 | */ | |
2943 | if (cdb[1] == MI_REPORT_TARGET_PGS) { | |
2944 | cmd->transport_emulate_cdb = | |
e3d6f909 | 2945 | (su_dev->t10_alua.alua_type == |
c66ac9db | 2946 | SPC3_ALUA_EMULATED) ? |
e3d6f909 | 2947 | core_emulate_report_target_port_groups : |
c66ac9db NB |
2948 | NULL; |
2949 | } | |
2950 | size = (cdb[6] << 24) | (cdb[7] << 16) | | |
2951 | (cdb[8] << 8) | cdb[9]; | |
2952 | } else { | |
2953 | /* GPCMD_SEND_KEY from multi media commands */ | |
2954 | size = (cdb[8] << 8) + cdb[9]; | |
2955 | } | |
05d1c7c0 | 2956 | cmd->se_cmd_flags |= SCF_SCSI_CONTROL_SG_IO_CDB; |
c66ac9db NB |
2957 | break; |
2958 | case MODE_SELECT: | |
2959 | size = cdb[4]; | |
2960 | cmd->se_cmd_flags |= SCF_SCSI_CONTROL_SG_IO_CDB; | |
2961 | break; | |
2962 | case MODE_SELECT_10: | |
2963 | size = (cdb[7] << 8) + cdb[8]; | |
2964 | cmd->se_cmd_flags |= SCF_SCSI_CONTROL_SG_IO_CDB; | |
2965 | break; | |
2966 | case MODE_SENSE: | |
2967 | size = cdb[4]; | |
05d1c7c0 | 2968 | cmd->se_cmd_flags |= SCF_SCSI_CONTROL_SG_IO_CDB; |
c66ac9db NB |
2969 | break; |
2970 | case MODE_SENSE_10: | |
2971 | case GPCMD_READ_BUFFER_CAPACITY: | |
2972 | case GPCMD_SEND_OPC: | |
2973 | case LOG_SELECT: | |
2974 | case LOG_SENSE: | |
2975 | size = (cdb[7] << 8) + cdb[8]; | |
05d1c7c0 | 2976 | cmd->se_cmd_flags |= SCF_SCSI_CONTROL_SG_IO_CDB; |
c66ac9db NB |
2977 | break; |
2978 | case READ_BLOCK_LIMITS: | |
2979 | size = READ_BLOCK_LEN; | |
05d1c7c0 | 2980 | cmd->se_cmd_flags |= SCF_SCSI_CONTROL_SG_IO_CDB; |
c66ac9db NB |
2981 | break; |
2982 | case GPCMD_GET_CONFIGURATION: | |
2983 | case GPCMD_READ_FORMAT_CAPACITIES: | |
2984 | case GPCMD_READ_DISC_INFO: | |
2985 | case GPCMD_READ_TRACK_RZONE_INFO: | |
2986 | size = (cdb[7] << 8) + cdb[8]; | |
2987 | cmd->se_cmd_flags |= SCF_SCSI_CONTROL_SG_IO_CDB; | |
2988 | break; | |
2989 | case PERSISTENT_RESERVE_IN: | |
2990 | case PERSISTENT_RESERVE_OUT: | |
2991 | cmd->transport_emulate_cdb = | |
e3d6f909 | 2992 | (su_dev->t10_pr.res_type == |
c66ac9db | 2993 | SPC3_PERSISTENT_RESERVATIONS) ? |
e3d6f909 | 2994 | core_scsi3_emulate_pr : NULL; |
c66ac9db | 2995 | size = (cdb[7] << 8) + cdb[8]; |
05d1c7c0 | 2996 | cmd->se_cmd_flags |= SCF_SCSI_CONTROL_SG_IO_CDB; |
c66ac9db NB |
2997 | break; |
2998 | case GPCMD_MECHANISM_STATUS: | |
2999 | case GPCMD_READ_DVD_STRUCTURE: | |
3000 | size = (cdb[8] << 8) + cdb[9]; | |
3001 | cmd->se_cmd_flags |= SCF_SCSI_CONTROL_SG_IO_CDB; | |
3002 | break; | |
3003 | case READ_POSITION: | |
3004 | size = READ_POSITION_LEN; | |
05d1c7c0 | 3005 | cmd->se_cmd_flags |= SCF_SCSI_CONTROL_SG_IO_CDB; |
c66ac9db | 3006 | break; |
e434f1f1 | 3007 | case MAINTENANCE_OUT: |
e3d6f909 | 3008 | if (dev->transport->get_device_type(dev) != TYPE_ROM) { |
c66ac9db NB |
3009 | /* MAINTENANCE_OUT from SCC-2 |
3010 | * | |
3011 | * Check for emulated MO_SET_TARGET_PGS. | |
3012 | */ | |
3013 | if (cdb[1] == MO_SET_TARGET_PGS) { | |
3014 | cmd->transport_emulate_cdb = | |
e3d6f909 | 3015 | (su_dev->t10_alua.alua_type == |
c66ac9db | 3016 | SPC3_ALUA_EMULATED) ? |
e3d6f909 | 3017 | core_emulate_set_target_port_groups : |
c66ac9db NB |
3018 | NULL; |
3019 | } | |
3020 | ||
3021 | size = (cdb[6] << 24) | (cdb[7] << 16) | | |
3022 | (cdb[8] << 8) | cdb[9]; | |
3023 | } else { | |
3024 | /* GPCMD_REPORT_KEY from multi media commands */ | |
3025 | size = (cdb[8] << 8) + cdb[9]; | |
3026 | } | |
05d1c7c0 | 3027 | cmd->se_cmd_flags |= SCF_SCSI_CONTROL_SG_IO_CDB; |
c66ac9db NB |
3028 | break; |
3029 | case INQUIRY: | |
3030 | size = (cdb[3] << 8) + cdb[4]; | |
3031 | /* | |
3032 | * Do implict HEAD_OF_QUEUE processing for INQUIRY. | |
3033 | * See spc4r17 section 5.3 | |
3034 | */ | |
5951146d | 3035 | if (cmd->se_dev->dev_task_attr_type == SAM_TASK_ATTR_EMULATED) |
e66ecd50 | 3036 | cmd->sam_task_attr = MSG_HEAD_TAG; |
05d1c7c0 | 3037 | cmd->se_cmd_flags |= SCF_SCSI_CONTROL_SG_IO_CDB; |
c66ac9db NB |
3038 | break; |
3039 | case READ_BUFFER: | |
3040 | size = (cdb[6] << 16) + (cdb[7] << 8) + cdb[8]; | |
05d1c7c0 | 3041 | cmd->se_cmd_flags |= SCF_SCSI_CONTROL_SG_IO_CDB; |
c66ac9db NB |
3042 | break; |
3043 | case READ_CAPACITY: | |
3044 | size = READ_CAP_LEN; | |
05d1c7c0 | 3045 | cmd->se_cmd_flags |= SCF_SCSI_CONTROL_SG_IO_CDB; |
c66ac9db NB |
3046 | break; |
3047 | case READ_MEDIA_SERIAL_NUMBER: | |
3048 | case SECURITY_PROTOCOL_IN: | |
3049 | case SECURITY_PROTOCOL_OUT: | |
3050 | size = (cdb[6] << 24) | (cdb[7] << 16) | (cdb[8] << 8) | cdb[9]; | |
05d1c7c0 | 3051 | cmd->se_cmd_flags |= SCF_SCSI_CONTROL_SG_IO_CDB; |
c66ac9db NB |
3052 | break; |
3053 | case SERVICE_ACTION_IN: | |
3054 | case ACCESS_CONTROL_IN: | |
3055 | case ACCESS_CONTROL_OUT: | |
3056 | case EXTENDED_COPY: | |
3057 | case READ_ATTRIBUTE: | |
3058 | case RECEIVE_COPY_RESULTS: | |
3059 | case WRITE_ATTRIBUTE: | |
3060 | size = (cdb[10] << 24) | (cdb[11] << 16) | | |
3061 | (cdb[12] << 8) | cdb[13]; | |
05d1c7c0 | 3062 | cmd->se_cmd_flags |= SCF_SCSI_CONTROL_SG_IO_CDB; |
c66ac9db NB |
3063 | break; |
3064 | case RECEIVE_DIAGNOSTIC: | |
3065 | case SEND_DIAGNOSTIC: | |
3066 | size = (cdb[3] << 8) | cdb[4]; | |
05d1c7c0 | 3067 | cmd->se_cmd_flags |= SCF_SCSI_CONTROL_SG_IO_CDB; |
c66ac9db NB |
3068 | break; |
3069 | /* #warning FIXME: Figure out correct GPCMD_READ_CD blocksize. */ | |
3070 | #if 0 | |
3071 | case GPCMD_READ_CD: | |
3072 | sectors = (cdb[6] << 16) + (cdb[7] << 8) + cdb[8]; | |
3073 | size = (2336 * sectors); | |
05d1c7c0 | 3074 | cmd->se_cmd_flags |= SCF_SCSI_CONTROL_SG_IO_CDB; |
c66ac9db NB |
3075 | break; |
3076 | #endif | |
3077 | case READ_TOC: | |
3078 | size = cdb[8]; | |
05d1c7c0 | 3079 | cmd->se_cmd_flags |= SCF_SCSI_CONTROL_SG_IO_CDB; |
c66ac9db NB |
3080 | break; |
3081 | case REQUEST_SENSE: | |
3082 | size = cdb[4]; | |
05d1c7c0 | 3083 | cmd->se_cmd_flags |= SCF_SCSI_CONTROL_SG_IO_CDB; |
c66ac9db NB |
3084 | break; |
3085 | case READ_ELEMENT_STATUS: | |
3086 | size = 65536 * cdb[7] + 256 * cdb[8] + cdb[9]; | |
05d1c7c0 | 3087 | cmd->se_cmd_flags |= SCF_SCSI_CONTROL_SG_IO_CDB; |
c66ac9db NB |
3088 | break; |
3089 | case WRITE_BUFFER: | |
3090 | size = (cdb[6] << 16) + (cdb[7] << 8) + cdb[8]; | |
05d1c7c0 | 3091 | cmd->se_cmd_flags |= SCF_SCSI_CONTROL_SG_IO_CDB; |
c66ac9db NB |
3092 | break; |
3093 | case RESERVE: | |
3094 | case RESERVE_10: | |
3095 | /* | |
3096 | * The SPC-2 RESERVE does not contain a size in the SCSI CDB. | |
3097 | * Assume the passthrough or $FABRIC_MOD will tell us about it. | |
3098 | */ | |
3099 | if (cdb[0] == RESERVE_10) | |
3100 | size = (cdb[7] << 8) | cdb[8]; | |
3101 | else | |
3102 | size = cmd->data_length; | |
3103 | ||
3104 | /* | |
3105 | * Setup the legacy emulated handler for SPC-2 and | |
3106 | * >= SPC-3 compatible reservation handling (CRH=1) | |
3107 | * Otherwise, we assume the underlying SCSI logic is | |
3108 | * is running in SPC_PASSTHROUGH, and wants reservations | |
3109 | * emulation disabled. | |
3110 | */ | |
3111 | cmd->transport_emulate_cdb = | |
e3d6f909 | 3112 | (su_dev->t10_pr.res_type != |
c66ac9db | 3113 | SPC_PASSTHROUGH) ? |
e3d6f909 | 3114 | core_scsi2_emulate_crh : NULL; |
c66ac9db NB |
3115 | cmd->se_cmd_flags |= SCF_SCSI_NON_DATA_CDB; |
3116 | break; | |
3117 | case RELEASE: | |
3118 | case RELEASE_10: | |
3119 | /* | |
3120 | * The SPC-2 RELEASE does not contain a size in the SCSI CDB. | |
3121 | * Assume the passthrough or $FABRIC_MOD will tell us about it. | |
3122 | */ | |
3123 | if (cdb[0] == RELEASE_10) | |
3124 | size = (cdb[7] << 8) | cdb[8]; | |
3125 | else | |
3126 | size = cmd->data_length; | |
3127 | ||
3128 | cmd->transport_emulate_cdb = | |
e3d6f909 | 3129 | (su_dev->t10_pr.res_type != |
c66ac9db | 3130 | SPC_PASSTHROUGH) ? |
e3d6f909 | 3131 | core_scsi2_emulate_crh : NULL; |
c66ac9db NB |
3132 | cmd->se_cmd_flags |= SCF_SCSI_NON_DATA_CDB; |
3133 | break; | |
3134 | case SYNCHRONIZE_CACHE: | |
3135 | case 0x91: /* SYNCHRONIZE_CACHE_16: */ | |
3136 | /* | |
3137 | * Extract LBA and range to be flushed for emulated SYNCHRONIZE_CACHE | |
3138 | */ | |
3139 | if (cdb[0] == SYNCHRONIZE_CACHE) { | |
3140 | sectors = transport_get_sectors_10(cdb, cmd, §or_ret); | |
a1d8b49a | 3141 | cmd->t_task_lba = transport_lba_32(cdb); |
c66ac9db NB |
3142 | } else { |
3143 | sectors = transport_get_sectors_16(cdb, cmd, §or_ret); | |
a1d8b49a | 3144 | cmd->t_task_lba = transport_lba_64(cdb); |
c66ac9db NB |
3145 | } |
3146 | if (sector_ret) | |
3147 | goto out_unsupported_cdb; | |
3148 | ||
3149 | size = transport_get_size(sectors, cdb, cmd); | |
3150 | cmd->se_cmd_flags |= SCF_SCSI_NON_DATA_CDB; | |
3151 | ||
3152 | /* | |
3153 | * For TCM/pSCSI passthrough, skip cmd->transport_emulate_cdb() | |
3154 | */ | |
e3d6f909 | 3155 | if (dev->transport->transport_type == TRANSPORT_PLUGIN_PHBA_PDEV) |
c66ac9db NB |
3156 | break; |
3157 | /* | |
3158 | * Set SCF_EMULATE_CDB_ASYNC to ensure asynchronous operation | |
3159 | * for SYNCHRONIZE_CACHE* Immed=1 case in __transport_execute_tasks() | |
3160 | */ | |
3161 | cmd->se_cmd_flags |= SCF_EMULATE_CDB_ASYNC; | |
3162 | /* | |
3163 | * Check to ensure that LBA + Range does not exceed past end of | |
7abbe7f3 | 3164 | * device for IBLOCK and FILEIO ->do_sync_cache() backend calls |
c66ac9db | 3165 | */ |
7abbe7f3 NB |
3166 | if ((cmd->t_task_lba != 0) || (sectors != 0)) { |
3167 | if (transport_cmd_get_valid_sectors(cmd) < 0) | |
3168 | goto out_invalid_cdb_field; | |
3169 | } | |
c66ac9db NB |
3170 | break; |
3171 | case UNMAP: | |
3172 | size = get_unaligned_be16(&cdb[7]); | |
05d1c7c0 | 3173 | cmd->se_cmd_flags |= SCF_SCSI_CONTROL_SG_IO_CDB; |
c66ac9db NB |
3174 | break; |
3175 | case WRITE_SAME_16: | |
3176 | sectors = transport_get_sectors_16(cdb, cmd, §or_ret); | |
3177 | if (sector_ret) | |
3178 | goto out_unsupported_cdb; | |
dd3a5ad8 | 3179 | |
6708bb27 | 3180 | if (sectors) |
12850626 | 3181 | size = transport_get_size(1, cdb, cmd); |
6708bb27 AG |
3182 | else { |
3183 | pr_err("WSNZ=1, WRITE_SAME w/sectors=0 not supported\n"); | |
3184 | goto out_invalid_cdb_field; | |
3185 | } | |
dd3a5ad8 | 3186 | |
5db0753b | 3187 | cmd->t_task_lba = get_unaligned_be64(&cdb[2]); |
706d5860 NB |
3188 | cmd->se_cmd_flags |= SCF_SCSI_CONTROL_SG_IO_CDB; |
3189 | ||
3190 | if (target_check_write_same_discard(&cdb[1], dev) < 0) | |
3191 | goto out_invalid_cdb_field; | |
3192 | break; | |
3193 | case WRITE_SAME: | |
3194 | sectors = transport_get_sectors_10(cdb, cmd, §or_ret); | |
3195 | if (sector_ret) | |
3196 | goto out_unsupported_cdb; | |
3197 | ||
3198 | if (sectors) | |
12850626 | 3199 | size = transport_get_size(1, cdb, cmd); |
706d5860 NB |
3200 | else { |
3201 | pr_err("WSNZ=1, WRITE_SAME w/sectors=0 not supported\n"); | |
3202 | goto out_invalid_cdb_field; | |
c66ac9db | 3203 | } |
706d5860 NB |
3204 | |
3205 | cmd->t_task_lba = get_unaligned_be32(&cdb[2]); | |
c66ac9db | 3206 | cmd->se_cmd_flags |= SCF_SCSI_CONTROL_SG_IO_CDB; |
706d5860 NB |
3207 | /* |
3208 | * Follow sbcr26 with WRITE_SAME (10) and check for the existence | |
3209 | * of byte 1 bit 3 UNMAP instead of original reserved field | |
3210 | */ | |
3211 | if (target_check_write_same_discard(&cdb[1], dev) < 0) | |
3212 | goto out_invalid_cdb_field; | |
c66ac9db NB |
3213 | break; |
3214 | case ALLOW_MEDIUM_REMOVAL: | |
3215 | case GPCMD_CLOSE_TRACK: | |
3216 | case ERASE: | |
3217 | case INITIALIZE_ELEMENT_STATUS: | |
3218 | case GPCMD_LOAD_UNLOAD: | |
3219 | case REZERO_UNIT: | |
3220 | case SEEK_10: | |
3221 | case GPCMD_SET_SPEED: | |
3222 | case SPACE: | |
3223 | case START_STOP: | |
3224 | case TEST_UNIT_READY: | |
3225 | case VERIFY: | |
3226 | case WRITE_FILEMARKS: | |
3227 | case MOVE_MEDIUM: | |
3228 | cmd->se_cmd_flags |= SCF_SCSI_NON_DATA_CDB; | |
3229 | break; | |
3230 | case REPORT_LUNS: | |
3231 | cmd->transport_emulate_cdb = | |
e3d6f909 | 3232 | transport_core_report_lun_response; |
c66ac9db NB |
3233 | size = (cdb[6] << 24) | (cdb[7] << 16) | (cdb[8] << 8) | cdb[9]; |
3234 | /* | |
3235 | * Do implict HEAD_OF_QUEUE processing for REPORT_LUNS | |
3236 | * See spc4r17 section 5.3 | |
3237 | */ | |
5951146d | 3238 | if (cmd->se_dev->dev_task_attr_type == SAM_TASK_ATTR_EMULATED) |
e66ecd50 | 3239 | cmd->sam_task_attr = MSG_HEAD_TAG; |
05d1c7c0 | 3240 | cmd->se_cmd_flags |= SCF_SCSI_CONTROL_SG_IO_CDB; |
c66ac9db NB |
3241 | break; |
3242 | default: | |
6708bb27 | 3243 | pr_warn("TARGET_CORE[%s]: Unsupported SCSI Opcode" |
c66ac9db | 3244 | " 0x%02x, sending CHECK_CONDITION.\n", |
e3d6f909 | 3245 | cmd->se_tfo->get_fabric_name(), cdb[0]); |
c66ac9db NB |
3246 | goto out_unsupported_cdb; |
3247 | } | |
3248 | ||
3249 | if (size != cmd->data_length) { | |
6708bb27 | 3250 | pr_warn("TARGET_CORE[%s]: Expected Transfer Length:" |
c66ac9db | 3251 | " %u does not match SCSI CDB Length: %u for SAM Opcode:" |
e3d6f909 | 3252 | " 0x%02x\n", cmd->se_tfo->get_fabric_name(), |
c66ac9db NB |
3253 | cmd->data_length, size, cdb[0]); |
3254 | ||
3255 | cmd->cmd_spdtl = size; | |
3256 | ||
3257 | if (cmd->data_direction == DMA_TO_DEVICE) { | |
6708bb27 | 3258 | pr_err("Rejecting underflow/overflow" |
c66ac9db NB |
3259 | " WRITE data\n"); |
3260 | goto out_invalid_cdb_field; | |
3261 | } | |
3262 | /* | |
3263 | * Reject READ_* or WRITE_* with overflow/underflow for | |
3264 | * type SCF_SCSI_DATA_SG_IO_CDB. | |
3265 | */ | |
6708bb27 AG |
3266 | if (!ret && (dev->se_sub_dev->se_dev_attrib.block_size != 512)) { |
3267 | pr_err("Failing OVERFLOW/UNDERFLOW for LBA op" | |
c66ac9db | 3268 | " CDB on non 512-byte sector setup subsystem" |
e3d6f909 | 3269 | " plugin: %s\n", dev->transport->name); |
c66ac9db NB |
3270 | /* Returns CHECK_CONDITION + INVALID_CDB_FIELD */ |
3271 | goto out_invalid_cdb_field; | |
3272 | } | |
3273 | ||
3274 | if (size > cmd->data_length) { | |
3275 | cmd->se_cmd_flags |= SCF_OVERFLOW_BIT; | |
3276 | cmd->residual_count = (size - cmd->data_length); | |
3277 | } else { | |
3278 | cmd->se_cmd_flags |= SCF_UNDERFLOW_BIT; | |
3279 | cmd->residual_count = (cmd->data_length - size); | |
3280 | } | |
3281 | cmd->data_length = size; | |
3282 | } | |
3283 | ||
d0229ae3 AG |
3284 | /* Let's limit control cdbs to a page, for simplicity's sake. */ |
3285 | if ((cmd->se_cmd_flags & SCF_SCSI_CONTROL_SG_IO_CDB) && | |
3286 | size > PAGE_SIZE) | |
3287 | goto out_invalid_cdb_field; | |
3288 | ||
c66ac9db NB |
3289 | transport_set_supported_SAM_opcode(cmd); |
3290 | return ret; | |
3291 | ||
3292 | out_unsupported_cdb: | |
3293 | cmd->se_cmd_flags |= SCF_SCSI_CDB_EXCEPTION; | |
3294 | cmd->scsi_sense_reason = TCM_UNSUPPORTED_SCSI_OPCODE; | |
5951146d | 3295 | return -EINVAL; |
c66ac9db NB |
3296 | out_invalid_cdb_field: |
3297 | cmd->se_cmd_flags |= SCF_SCSI_CDB_EXCEPTION; | |
3298 | cmd->scsi_sense_reason = TCM_INVALID_CDB_FIELD; | |
5951146d | 3299 | return -EINVAL; |
c66ac9db NB |
3300 | } |
3301 | ||
c66ac9db | 3302 | /* |
35e0e757 | 3303 | * Called from I/O completion to determine which dormant/delayed |
c66ac9db NB |
3304 | * and ordered cmds need to have their tasks added to the execution queue. |
3305 | */ | |
3306 | static void transport_complete_task_attr(struct se_cmd *cmd) | |
3307 | { | |
5951146d | 3308 | struct se_device *dev = cmd->se_dev; |
c66ac9db NB |
3309 | struct se_cmd *cmd_p, *cmd_tmp; |
3310 | int new_active_tasks = 0; | |
3311 | ||
e66ecd50 | 3312 | if (cmd->sam_task_attr == MSG_SIMPLE_TAG) { |
c66ac9db NB |
3313 | atomic_dec(&dev->simple_cmds); |
3314 | smp_mb__after_atomic_dec(); | |
3315 | dev->dev_cur_ordered_id++; | |
6708bb27 | 3316 | pr_debug("Incremented dev->dev_cur_ordered_id: %u for" |
c66ac9db NB |
3317 | " SIMPLE: %u\n", dev->dev_cur_ordered_id, |
3318 | cmd->se_ordered_id); | |
e66ecd50 | 3319 | } else if (cmd->sam_task_attr == MSG_HEAD_TAG) { |
c66ac9db NB |
3320 | atomic_dec(&dev->dev_hoq_count); |
3321 | smp_mb__after_atomic_dec(); | |
3322 | dev->dev_cur_ordered_id++; | |
6708bb27 | 3323 | pr_debug("Incremented dev_cur_ordered_id: %u for" |
c66ac9db NB |
3324 | " HEAD_OF_QUEUE: %u\n", dev->dev_cur_ordered_id, |
3325 | cmd->se_ordered_id); | |
e66ecd50 | 3326 | } else if (cmd->sam_task_attr == MSG_ORDERED_TAG) { |
c66ac9db | 3327 | spin_lock(&dev->ordered_cmd_lock); |
5951146d | 3328 | list_del(&cmd->se_ordered_node); |
c66ac9db NB |
3329 | atomic_dec(&dev->dev_ordered_sync); |
3330 | smp_mb__after_atomic_dec(); | |
3331 | spin_unlock(&dev->ordered_cmd_lock); | |
3332 | ||
3333 | dev->dev_cur_ordered_id++; | |
6708bb27 | 3334 | pr_debug("Incremented dev_cur_ordered_id: %u for ORDERED:" |
c66ac9db NB |
3335 | " %u\n", dev->dev_cur_ordered_id, cmd->se_ordered_id); |
3336 | } | |
3337 | /* | |
3338 | * Process all commands up to the last received | |
3339 | * ORDERED task attribute which requires another blocking | |
3340 | * boundary | |
3341 | */ | |
3342 | spin_lock(&dev->delayed_cmd_lock); | |
3343 | list_for_each_entry_safe(cmd_p, cmd_tmp, | |
5951146d | 3344 | &dev->delayed_cmd_list, se_delayed_node) { |
c66ac9db | 3345 | |
5951146d | 3346 | list_del(&cmd_p->se_delayed_node); |
c66ac9db NB |
3347 | spin_unlock(&dev->delayed_cmd_lock); |
3348 | ||
6708bb27 | 3349 | pr_debug("Calling add_tasks() for" |
c66ac9db NB |
3350 | " cmd_p: 0x%02x Task Attr: 0x%02x" |
3351 | " Dormant -> Active, se_ordered_id: %u\n", | |
6708bb27 | 3352 | cmd_p->t_task_cdb[0], |
c66ac9db NB |
3353 | cmd_p->sam_task_attr, cmd_p->se_ordered_id); |
3354 | ||
3355 | transport_add_tasks_from_cmd(cmd_p); | |
3356 | new_active_tasks++; | |
3357 | ||
3358 | spin_lock(&dev->delayed_cmd_lock); | |
e66ecd50 | 3359 | if (cmd_p->sam_task_attr == MSG_ORDERED_TAG) |
c66ac9db NB |
3360 | break; |
3361 | } | |
3362 | spin_unlock(&dev->delayed_cmd_lock); | |
3363 | /* | |
3364 | * If new tasks have become active, wake up the transport thread | |
3365 | * to do the processing of the Active tasks. | |
3366 | */ | |
3367 | if (new_active_tasks != 0) | |
e3d6f909 | 3368 | wake_up_interruptible(&dev->dev_queue_obj.thread_wq); |
c66ac9db NB |
3369 | } |
3370 | ||
e057f533 | 3371 | static void transport_complete_qf(struct se_cmd *cmd) |
07bde79a NB |
3372 | { |
3373 | int ret = 0; | |
3374 | ||
e057f533 CH |
3375 | if (cmd->se_dev->dev_task_attr_type == SAM_TASK_ATTR_EMULATED) |
3376 | transport_complete_task_attr(cmd); | |
3377 | ||
3378 | if (cmd->se_cmd_flags & SCF_TRANSPORT_TASK_SENSE) { | |
3379 | ret = cmd->se_tfo->queue_status(cmd); | |
3380 | if (ret) | |
3381 | goto out; | |
3382 | } | |
07bde79a NB |
3383 | |
3384 | switch (cmd->data_direction) { | |
3385 | case DMA_FROM_DEVICE: | |
3386 | ret = cmd->se_tfo->queue_data_in(cmd); | |
3387 | break; | |
3388 | case DMA_TO_DEVICE: | |
ec98f782 | 3389 | if (cmd->t_bidi_data_sg) { |
07bde79a NB |
3390 | ret = cmd->se_tfo->queue_data_in(cmd); |
3391 | if (ret < 0) | |
e057f533 | 3392 | break; |
07bde79a NB |
3393 | } |
3394 | /* Fall through for DMA_TO_DEVICE */ | |
3395 | case DMA_NONE: | |
3396 | ret = cmd->se_tfo->queue_status(cmd); | |
3397 | break; | |
3398 | default: | |
3399 | break; | |
3400 | } | |
3401 | ||
e057f533 CH |
3402 | out: |
3403 | if (ret < 0) { | |
3404 | transport_handle_queue_full(cmd, cmd->se_dev); | |
3405 | return; | |
3406 | } | |
3407 | transport_lun_remove_cmd(cmd); | |
3408 | transport_cmd_check_stop_to_fabric(cmd); | |
07bde79a NB |
3409 | } |
3410 | ||
3411 | static void transport_handle_queue_full( | |
3412 | struct se_cmd *cmd, | |
e057f533 | 3413 | struct se_device *dev) |
07bde79a NB |
3414 | { |
3415 | spin_lock_irq(&dev->qf_cmd_lock); | |
07bde79a NB |
3416 | list_add_tail(&cmd->se_qf_node, &cmd->se_dev->qf_cmd_list); |
3417 | atomic_inc(&dev->dev_qf_count); | |
3418 | smp_mb__after_atomic_inc(); | |
3419 | spin_unlock_irq(&cmd->se_dev->qf_cmd_lock); | |
3420 | ||
3421 | schedule_work(&cmd->se_dev->qf_work_queue); | |
3422 | } | |
3423 | ||
35e0e757 | 3424 | static void target_complete_ok_work(struct work_struct *work) |
c66ac9db | 3425 | { |
35e0e757 | 3426 | struct se_cmd *cmd = container_of(work, struct se_cmd, work); |
07bde79a | 3427 | int reason = 0, ret; |
35e0e757 | 3428 | |
c66ac9db NB |
3429 | /* |
3430 | * Check if we need to move delayed/dormant tasks from cmds on the | |
3431 | * delayed execution list after a HEAD_OF_QUEUE or ORDERED Task | |
3432 | * Attribute. | |
3433 | */ | |
5951146d | 3434 | if (cmd->se_dev->dev_task_attr_type == SAM_TASK_ATTR_EMULATED) |
c66ac9db | 3435 | transport_complete_task_attr(cmd); |
07bde79a NB |
3436 | /* |
3437 | * Check to schedule QUEUE_FULL work, or execute an existing | |
3438 | * cmd->transport_qf_callback() | |
3439 | */ | |
3440 | if (atomic_read(&cmd->se_dev->dev_qf_count) != 0) | |
3441 | schedule_work(&cmd->se_dev->qf_work_queue); | |
3442 | ||
c66ac9db NB |
3443 | /* |
3444 | * Check if we need to retrieve a sense buffer from | |
3445 | * the struct se_cmd in question. | |
3446 | */ | |
3447 | if (cmd->se_cmd_flags & SCF_TRANSPORT_TASK_SENSE) { | |
3448 | if (transport_get_sense_data(cmd) < 0) | |
3449 | reason = TCM_NON_EXISTENT_LUN; | |
3450 | ||
3451 | /* | |
3452 | * Only set when an struct se_task->task_scsi_status returned | |
3453 | * a non GOOD status. | |
3454 | */ | |
3455 | if (cmd->scsi_status) { | |
07bde79a | 3456 | ret = transport_send_check_condition_and_sense( |
c66ac9db | 3457 | cmd, reason, 1); |
07bde79a NB |
3458 | if (ret == -EAGAIN) |
3459 | goto queue_full; | |
3460 | ||
c66ac9db NB |
3461 | transport_lun_remove_cmd(cmd); |
3462 | transport_cmd_check_stop_to_fabric(cmd); | |
3463 | return; | |
3464 | } | |
3465 | } | |
3466 | /* | |
25985edc | 3467 | * Check for a callback, used by amongst other things |
c66ac9db NB |
3468 | * XDWRITE_READ_10 emulation. |
3469 | */ | |
3470 | if (cmd->transport_complete_callback) | |
3471 | cmd->transport_complete_callback(cmd); | |
3472 | ||
3473 | switch (cmd->data_direction) { | |
3474 | case DMA_FROM_DEVICE: | |
3475 | spin_lock(&cmd->se_lun->lun_sep_lock); | |
e3d6f909 AG |
3476 | if (cmd->se_lun->lun_sep) { |
3477 | cmd->se_lun->lun_sep->sep_stats.tx_data_octets += | |
c66ac9db NB |
3478 | cmd->data_length; |
3479 | } | |
3480 | spin_unlock(&cmd->se_lun->lun_sep_lock); | |
c66ac9db | 3481 | |
07bde79a NB |
3482 | ret = cmd->se_tfo->queue_data_in(cmd); |
3483 | if (ret == -EAGAIN) | |
3484 | goto queue_full; | |
c66ac9db NB |
3485 | break; |
3486 | case DMA_TO_DEVICE: | |
3487 | spin_lock(&cmd->se_lun->lun_sep_lock); | |
e3d6f909 AG |
3488 | if (cmd->se_lun->lun_sep) { |
3489 | cmd->se_lun->lun_sep->sep_stats.rx_data_octets += | |
c66ac9db NB |
3490 | cmd->data_length; |
3491 | } | |
3492 | spin_unlock(&cmd->se_lun->lun_sep_lock); | |
3493 | /* | |
3494 | * Check if we need to send READ payload for BIDI-COMMAND | |
3495 | */ | |
ec98f782 | 3496 | if (cmd->t_bidi_data_sg) { |
c66ac9db | 3497 | spin_lock(&cmd->se_lun->lun_sep_lock); |
e3d6f909 AG |
3498 | if (cmd->se_lun->lun_sep) { |
3499 | cmd->se_lun->lun_sep->sep_stats.tx_data_octets += | |
c66ac9db NB |
3500 | cmd->data_length; |
3501 | } | |
3502 | spin_unlock(&cmd->se_lun->lun_sep_lock); | |
07bde79a NB |
3503 | ret = cmd->se_tfo->queue_data_in(cmd); |
3504 | if (ret == -EAGAIN) | |
3505 | goto queue_full; | |
c66ac9db NB |
3506 | break; |
3507 | } | |
3508 | /* Fall through for DMA_TO_DEVICE */ | |
3509 | case DMA_NONE: | |
07bde79a NB |
3510 | ret = cmd->se_tfo->queue_status(cmd); |
3511 | if (ret == -EAGAIN) | |
3512 | goto queue_full; | |
c66ac9db NB |
3513 | break; |
3514 | default: | |
3515 | break; | |
3516 | } | |
3517 | ||
3518 | transport_lun_remove_cmd(cmd); | |
3519 | transport_cmd_check_stop_to_fabric(cmd); | |
07bde79a NB |
3520 | return; |
3521 | ||
3522 | queue_full: | |
6708bb27 | 3523 | pr_debug("Handling complete_ok QUEUE_FULL: se_cmd: %p," |
07bde79a | 3524 | " data_direction: %d\n", cmd, cmd->data_direction); |
e057f533 CH |
3525 | cmd->t_state = TRANSPORT_COMPLETE_QF_OK; |
3526 | transport_handle_queue_full(cmd, cmd->se_dev); | |
c66ac9db NB |
3527 | } |
3528 | ||
3529 | static void transport_free_dev_tasks(struct se_cmd *cmd) | |
3530 | { | |
3531 | struct se_task *task, *task_tmp; | |
3532 | unsigned long flags; | |
0c2cfe5f | 3533 | LIST_HEAD(dispose_list); |
c66ac9db | 3534 | |
a1d8b49a | 3535 | spin_lock_irqsave(&cmd->t_state_lock, flags); |
c66ac9db | 3536 | list_for_each_entry_safe(task, task_tmp, |
a1d8b49a | 3537 | &cmd->t_task_list, t_list) { |
0c2cfe5f CH |
3538 | if (!(task->task_flags & TF_ACTIVE)) |
3539 | list_move_tail(&task->t_list, &dispose_list); | |
3540 | } | |
3541 | spin_unlock_irqrestore(&cmd->t_state_lock, flags); | |
3542 | ||
3543 | while (!list_empty(&dispose_list)) { | |
3544 | task = list_first_entry(&dispose_list, struct se_task, t_list); | |
c66ac9db | 3545 | |
cc5d0f0f CH |
3546 | /* |
3547 | * We already cancelled all pending timers in | |
3548 | * transport_complete_task, but that was just a pure del_timer, | |
3549 | * so do a full del_timer_sync here to make sure any handler | |
3550 | * that was running at that point has finished execution. | |
3551 | */ | |
3552 | del_timer_sync(&task->task_timer); | |
3553 | ||
af3f00c7 CH |
3554 | if (task->task_sg != cmd->t_data_sg && |
3555 | task->task_sg != cmd->t_bidi_data_sg) | |
3556 | kfree(task->task_sg); | |
c66ac9db NB |
3557 | |
3558 | list_del(&task->t_list); | |
3559 | ||
42bf829e | 3560 | cmd->se_dev->transport->free_task(task); |
c66ac9db | 3561 | } |
c66ac9db NB |
3562 | } |
3563 | ||
6708bb27 | 3564 | static inline void transport_free_sgl(struct scatterlist *sgl, int nents) |
c66ac9db | 3565 | { |
ec98f782 | 3566 | struct scatterlist *sg; |
ec98f782 | 3567 | int count; |
c66ac9db | 3568 | |
6708bb27 AG |
3569 | for_each_sg(sgl, sg, nents, count) |
3570 | __free_page(sg_page(sg)); | |
c66ac9db | 3571 | |
6708bb27 AG |
3572 | kfree(sgl); |
3573 | } | |
c66ac9db | 3574 | |
6708bb27 AG |
3575 | static inline void transport_free_pages(struct se_cmd *cmd) |
3576 | { | |
3577 | if (cmd->se_cmd_flags & SCF_PASSTHROUGH_SG_TO_MEM_NOALLOC) | |
3578 | return; | |
3579 | ||
3580 | transport_free_sgl(cmd->t_data_sg, cmd->t_data_nents); | |
ec98f782 AG |
3581 | cmd->t_data_sg = NULL; |
3582 | cmd->t_data_nents = 0; | |
c66ac9db | 3583 | |
6708bb27 | 3584 | transport_free_sgl(cmd->t_bidi_data_sg, cmd->t_bidi_data_nents); |
ec98f782 AG |
3585 | cmd->t_bidi_data_sg = NULL; |
3586 | cmd->t_bidi_data_nents = 0; | |
c66ac9db NB |
3587 | } |
3588 | ||
d3df7825 CH |
3589 | /** |
3590 | * transport_put_cmd - release a reference to a command | |
3591 | * @cmd: command to release | |
3592 | * | |
3593 | * This routine releases our reference to the command and frees it if possible. | |
3594 | */ | |
39c05f32 | 3595 | static void transport_put_cmd(struct se_cmd *cmd) |
c66ac9db NB |
3596 | { |
3597 | unsigned long flags; | |
4911e3cc | 3598 | int free_tasks = 0; |
c66ac9db | 3599 | |
a1d8b49a | 3600 | spin_lock_irqsave(&cmd->t_state_lock, flags); |
4911e3cc CH |
3601 | if (atomic_read(&cmd->t_fe_count)) { |
3602 | if (!atomic_dec_and_test(&cmd->t_fe_count)) | |
3603 | goto out_busy; | |
3604 | } | |
3605 | ||
3606 | if (atomic_read(&cmd->t_se_count)) { | |
3607 | if (!atomic_dec_and_test(&cmd->t_se_count)) | |
3608 | goto out_busy; | |
3609 | } | |
3610 | ||
3611 | if (atomic_read(&cmd->transport_dev_active)) { | |
3612 | atomic_set(&cmd->transport_dev_active, 0); | |
3613 | transport_all_task_dev_remove_state(cmd); | |
3614 | free_tasks = 1; | |
c66ac9db | 3615 | } |
a1d8b49a | 3616 | spin_unlock_irqrestore(&cmd->t_state_lock, flags); |
c66ac9db | 3617 | |
4911e3cc CH |
3618 | if (free_tasks != 0) |
3619 | transport_free_dev_tasks(cmd); | |
d3df7825 | 3620 | |
c66ac9db | 3621 | transport_free_pages(cmd); |
31afc39c | 3622 | transport_release_cmd(cmd); |
39c05f32 | 3623 | return; |
4911e3cc CH |
3624 | out_busy: |
3625 | spin_unlock_irqrestore(&cmd->t_state_lock, flags); | |
c66ac9db NB |
3626 | } |
3627 | ||
c66ac9db | 3628 | /* |
ec98f782 AG |
3629 | * transport_generic_map_mem_to_cmd - Use fabric-alloced pages instead of |
3630 | * allocating in the core. | |
c66ac9db NB |
3631 | * @cmd: Associated se_cmd descriptor |
3632 | * @mem: SGL style memory for TCM WRITE / READ | |
3633 | * @sg_mem_num: Number of SGL elements | |
3634 | * @mem_bidi_in: SGL style memory for TCM BIDI READ | |
3635 | * @sg_mem_bidi_num: Number of BIDI READ SGL elements | |
3636 | * | |
3637 | * Return: nonzero return cmd was rejected for -ENOMEM or inproper usage | |
3638 | * of parameters. | |
3639 | */ | |
3640 | int transport_generic_map_mem_to_cmd( | |
3641 | struct se_cmd *cmd, | |
5951146d AG |
3642 | struct scatterlist *sgl, |
3643 | u32 sgl_count, | |
3644 | struct scatterlist *sgl_bidi, | |
3645 | u32 sgl_bidi_count) | |
c66ac9db | 3646 | { |
5951146d | 3647 | if (!sgl || !sgl_count) |
c66ac9db | 3648 | return 0; |
c66ac9db | 3649 | |
c66ac9db NB |
3650 | if ((cmd->se_cmd_flags & SCF_SCSI_DATA_SG_IO_CDB) || |
3651 | (cmd->se_cmd_flags & SCF_SCSI_CONTROL_SG_IO_CDB)) { | |
c66ac9db | 3652 | |
ec98f782 AG |
3653 | cmd->t_data_sg = sgl; |
3654 | cmd->t_data_nents = sgl_count; | |
c66ac9db | 3655 | |
ec98f782 AG |
3656 | if (sgl_bidi && sgl_bidi_count) { |
3657 | cmd->t_bidi_data_sg = sgl_bidi; | |
3658 | cmd->t_bidi_data_nents = sgl_bidi_count; | |
c66ac9db NB |
3659 | } |
3660 | cmd->se_cmd_flags |= SCF_PASSTHROUGH_SG_TO_MEM_NOALLOC; | |
c66ac9db NB |
3661 | } |
3662 | ||
3663 | return 0; | |
3664 | } | |
3665 | EXPORT_SYMBOL(transport_generic_map_mem_to_cmd); | |
3666 | ||
05d1c7c0 AG |
3667 | void *transport_kmap_first_data_page(struct se_cmd *cmd) |
3668 | { | |
ec98f782 | 3669 | struct scatterlist *sg = cmd->t_data_sg; |
05d1c7c0 | 3670 | |
ec98f782 | 3671 | BUG_ON(!sg); |
05d1c7c0 | 3672 | /* |
ec98f782 AG |
3673 | * We need to take into account a possible offset here for fabrics like |
3674 | * tcm_loop who may be using a contig buffer from the SCSI midlayer for | |
3675 | * control CDBs passed as SGLs via transport_generic_map_mem_to_cmd() | |
05d1c7c0 | 3676 | */ |
ec98f782 | 3677 | return kmap(sg_page(sg)) + sg->offset; |
05d1c7c0 AG |
3678 | } |
3679 | EXPORT_SYMBOL(transport_kmap_first_data_page); | |
3680 | ||
3681 | void transport_kunmap_first_data_page(struct se_cmd *cmd) | |
3682 | { | |
ec98f782 | 3683 | kunmap(sg_page(cmd->t_data_sg)); |
05d1c7c0 AG |
3684 | } |
3685 | EXPORT_SYMBOL(transport_kunmap_first_data_page); | |
3686 | ||
c66ac9db | 3687 | static int |
05d1c7c0 | 3688 | transport_generic_get_mem(struct se_cmd *cmd) |
c66ac9db | 3689 | { |
ec98f782 AG |
3690 | u32 length = cmd->data_length; |
3691 | unsigned int nents; | |
3692 | struct page *page; | |
3693 | int i = 0; | |
c66ac9db | 3694 | |
ec98f782 AG |
3695 | nents = DIV_ROUND_UP(length, PAGE_SIZE); |
3696 | cmd->t_data_sg = kmalloc(sizeof(struct scatterlist) * nents, GFP_KERNEL); | |
3697 | if (!cmd->t_data_sg) | |
3698 | return -ENOMEM; | |
c66ac9db | 3699 | |
ec98f782 AG |
3700 | cmd->t_data_nents = nents; |
3701 | sg_init_table(cmd->t_data_sg, nents); | |
c66ac9db | 3702 | |
ec98f782 AG |
3703 | while (length) { |
3704 | u32 page_len = min_t(u32, length, PAGE_SIZE); | |
3705 | page = alloc_page(GFP_KERNEL | __GFP_ZERO); | |
3706 | if (!page) | |
3707 | goto out; | |
c66ac9db | 3708 | |
ec98f782 AG |
3709 | sg_set_page(&cmd->t_data_sg[i], page, page_len, 0); |
3710 | length -= page_len; | |
3711 | i++; | |
c66ac9db | 3712 | } |
c66ac9db | 3713 | return 0; |
c66ac9db | 3714 | |
ec98f782 AG |
3715 | out: |
3716 | while (i >= 0) { | |
3717 | __free_page(sg_page(&cmd->t_data_sg[i])); | |
3718 | i--; | |
c66ac9db | 3719 | } |
ec98f782 AG |
3720 | kfree(cmd->t_data_sg); |
3721 | cmd->t_data_sg = NULL; | |
3722 | return -ENOMEM; | |
c66ac9db NB |
3723 | } |
3724 | ||
a1d8b49a AG |
3725 | /* Reduce sectors if they are too long for the device */ |
3726 | static inline sector_t transport_limit_task_sectors( | |
c66ac9db NB |
3727 | struct se_device *dev, |
3728 | unsigned long long lba, | |
a1d8b49a | 3729 | sector_t sectors) |
c66ac9db | 3730 | { |
a1d8b49a | 3731 | sectors = min_t(sector_t, sectors, dev->se_sub_dev->se_dev_attrib.max_sectors); |
c66ac9db | 3732 | |
a1d8b49a AG |
3733 | if (dev->transport->get_device_type(dev) == TYPE_DISK) |
3734 | if ((lba + sectors) > transport_dev_end_lba(dev)) | |
3735 | sectors = ((transport_dev_end_lba(dev) - lba) + 1); | |
c66ac9db | 3736 | |
a1d8b49a | 3737 | return sectors; |
c66ac9db NB |
3738 | } |
3739 | ||
c66ac9db NB |
3740 | |
3741 | /* | |
3742 | * This function can be used by HW target mode drivers to create a linked | |
3743 | * scatterlist from all contiguously allocated struct se_task->task_sg[]. | |
3744 | * This is intended to be called during the completion path by TCM Core | |
3745 | * when struct target_core_fabric_ops->check_task_sg_chaining is enabled. | |
3746 | */ | |
3747 | void transport_do_task_sg_chain(struct se_cmd *cmd) | |
3748 | { | |
ec98f782 AG |
3749 | struct scatterlist *sg_first = NULL; |
3750 | struct scatterlist *sg_prev = NULL; | |
3751 | int sg_prev_nents = 0; | |
3752 | struct scatterlist *sg; | |
c66ac9db | 3753 | struct se_task *task; |
ec98f782 | 3754 | u32 chained_nents = 0; |
c66ac9db NB |
3755 | int i; |
3756 | ||
ec98f782 AG |
3757 | BUG_ON(!cmd->se_tfo->task_sg_chaining); |
3758 | ||
c66ac9db NB |
3759 | /* |
3760 | * Walk the struct se_task list and setup scatterlist chains | |
a1d8b49a | 3761 | * for each contiguously allocated struct se_task->task_sg[]. |
c66ac9db | 3762 | */ |
a1d8b49a | 3763 | list_for_each_entry(task, &cmd->t_task_list, t_list) { |
ec98f782 | 3764 | if (!task->task_sg) |
c66ac9db NB |
3765 | continue; |
3766 | ||
ec98f782 AG |
3767 | if (!sg_first) { |
3768 | sg_first = task->task_sg; | |
6708bb27 | 3769 | chained_nents = task->task_sg_nents; |
97868c89 | 3770 | } else { |
ec98f782 | 3771 | sg_chain(sg_prev, sg_prev_nents, task->task_sg); |
6708bb27 | 3772 | chained_nents += task->task_sg_nents; |
97868c89 | 3773 | } |
c3c74c7a NB |
3774 | /* |
3775 | * For the padded tasks, use the extra SGL vector allocated | |
3776 | * in transport_allocate_data_tasks() for the sg_prev_nents | |
04629b7b CH |
3777 | * offset into sg_chain() above. |
3778 | * | |
3779 | * We do not need the padding for the last task (or a single | |
3780 | * task), but in that case we will never use the sg_prev_nents | |
3781 | * value below which would be incorrect. | |
c3c74c7a | 3782 | */ |
04629b7b | 3783 | sg_prev_nents = (task->task_sg_nents + 1); |
ec98f782 | 3784 | sg_prev = task->task_sg; |
c66ac9db NB |
3785 | } |
3786 | /* | |
3787 | * Setup the starting pointer and total t_tasks_sg_linked_no including | |
3788 | * padding SGs for linking and to mark the end. | |
3789 | */ | |
a1d8b49a | 3790 | cmd->t_tasks_sg_chained = sg_first; |
ec98f782 | 3791 | cmd->t_tasks_sg_chained_no = chained_nents; |
c66ac9db | 3792 | |
6708bb27 | 3793 | pr_debug("Setup cmd: %p cmd->t_tasks_sg_chained: %p and" |
a1d8b49a AG |
3794 | " t_tasks_sg_chained_no: %u\n", cmd, cmd->t_tasks_sg_chained, |
3795 | cmd->t_tasks_sg_chained_no); | |
c66ac9db | 3796 | |
a1d8b49a AG |
3797 | for_each_sg(cmd->t_tasks_sg_chained, sg, |
3798 | cmd->t_tasks_sg_chained_no, i) { | |
c66ac9db | 3799 | |
6708bb27 | 3800 | pr_debug("SG[%d]: %p page: %p length: %d offset: %d\n", |
5951146d | 3801 | i, sg, sg_page(sg), sg->length, sg->offset); |
c66ac9db | 3802 | if (sg_is_chain(sg)) |
6708bb27 | 3803 | pr_debug("SG: %p sg_is_chain=1\n", sg); |
c66ac9db | 3804 | if (sg_is_last(sg)) |
6708bb27 | 3805 | pr_debug("SG: %p sg_is_last=1\n", sg); |
c66ac9db | 3806 | } |
c66ac9db NB |
3807 | } |
3808 | EXPORT_SYMBOL(transport_do_task_sg_chain); | |
3809 | ||
a1d8b49a AG |
3810 | /* |
3811 | * Break up cmd into chunks transport can handle | |
3812 | */ | |
38b40067 CH |
3813 | static int |
3814 | transport_allocate_data_tasks(struct se_cmd *cmd, | |
c66ac9db | 3815 | enum dma_data_direction data_direction, |
38b40067 | 3816 | struct scatterlist *cmd_sg, unsigned int sgl_nents) |
c66ac9db | 3817 | { |
5951146d | 3818 | struct se_device *dev = cmd->se_dev; |
a3eedc22 | 3819 | int task_count, i; |
38b40067 CH |
3820 | unsigned long long lba; |
3821 | sector_t sectors, dev_max_sectors; | |
3822 | u32 sector_size; | |
3823 | ||
3824 | if (transport_cmd_get_valid_sectors(cmd) < 0) | |
3825 | return -EINVAL; | |
3826 | ||
3827 | dev_max_sectors = dev->se_sub_dev->se_dev_attrib.max_sectors; | |
3828 | sector_size = dev->se_sub_dev->se_dev_attrib.block_size; | |
a1d8b49a | 3829 | |
ec98f782 | 3830 | WARN_ON(cmd->data_length % sector_size); |
38b40067 CH |
3831 | |
3832 | lba = cmd->t_task_lba; | |
ec98f782 | 3833 | sectors = DIV_ROUND_UP(cmd->data_length, sector_size); |
277c5f27 | 3834 | task_count = DIV_ROUND_UP_SECTOR_T(sectors, dev_max_sectors); |
af3f00c7 CH |
3835 | |
3836 | /* | |
3837 | * If we need just a single task reuse the SG list in the command | |
3838 | * and avoid a lot of work. | |
3839 | */ | |
3840 | if (task_count == 1) { | |
3841 | struct se_task *task; | |
3842 | unsigned long flags; | |
3843 | ||
3844 | task = transport_generic_get_task(cmd, data_direction); | |
3845 | if (!task) | |
3846 | return -ENOMEM; | |
3847 | ||
3848 | task->task_sg = cmd_sg; | |
3849 | task->task_sg_nents = sgl_nents; | |
3850 | ||
3851 | task->task_lba = lba; | |
3852 | task->task_sectors = sectors; | |
3853 | task->task_size = task->task_sectors * sector_size; | |
3854 | ||
3855 | spin_lock_irqsave(&cmd->t_state_lock, flags); | |
3856 | list_add_tail(&task->t_list, &cmd->t_task_list); | |
3857 | spin_unlock_irqrestore(&cmd->t_state_lock, flags); | |
3858 | ||
3859 | return task_count; | |
3860 | } | |
3861 | ||
ec98f782 | 3862 | for (i = 0; i < task_count; i++) { |
38b40067 | 3863 | struct se_task *task; |
c3c74c7a | 3864 | unsigned int task_size, task_sg_nents_padded; |
38b40067 CH |
3865 | struct scatterlist *sg; |
3866 | unsigned long flags; | |
ec98f782 | 3867 | int count; |
a1d8b49a | 3868 | |
c66ac9db | 3869 | task = transport_generic_get_task(cmd, data_direction); |
a1d8b49a | 3870 | if (!task) |
ec98f782 | 3871 | return -ENOMEM; |
c66ac9db | 3872 | |
c66ac9db | 3873 | task->task_lba = lba; |
ec98f782 AG |
3874 | task->task_sectors = min(sectors, dev_max_sectors); |
3875 | task->task_size = task->task_sectors * sector_size; | |
c66ac9db | 3876 | |
525a48a2 NB |
3877 | /* |
3878 | * This now assumes that passed sg_ents are in PAGE_SIZE chunks | |
3879 | * in order to calculate the number per task SGL entries | |
3880 | */ | |
3881 | task->task_sg_nents = DIV_ROUND_UP(task->task_size, PAGE_SIZE); | |
c66ac9db | 3882 | /* |
ec98f782 AG |
3883 | * Check if the fabric module driver is requesting that all |
3884 | * struct se_task->task_sg[] be chained together.. If so, | |
3885 | * then allocate an extra padding SG entry for linking and | |
c3c74c7a NB |
3886 | * marking the end of the chained SGL for every task except |
3887 | * the last one for (task_count > 1) operation, or skipping | |
3888 | * the extra padding for the (task_count == 1) case. | |
c66ac9db | 3889 | */ |
c3c74c7a NB |
3890 | if (cmd->se_tfo->task_sg_chaining && (i < (task_count - 1))) { |
3891 | task_sg_nents_padded = (task->task_sg_nents + 1); | |
c3c74c7a NB |
3892 | } else |
3893 | task_sg_nents_padded = task->task_sg_nents; | |
c66ac9db | 3894 | |
1d20bb61 | 3895 | task->task_sg = kmalloc(sizeof(struct scatterlist) * |
c3c74c7a | 3896 | task_sg_nents_padded, GFP_KERNEL); |
ec98f782 AG |
3897 | if (!task->task_sg) { |
3898 | cmd->se_dev->transport->free_task(task); | |
3899 | return -ENOMEM; | |
3900 | } | |
3901 | ||
c3c74c7a | 3902 | sg_init_table(task->task_sg, task_sg_nents_padded); |
c66ac9db | 3903 | |
ec98f782 AG |
3904 | task_size = task->task_size; |
3905 | ||
3906 | /* Build new sgl, only up to task_size */ | |
6708bb27 | 3907 | for_each_sg(task->task_sg, sg, task->task_sg_nents, count) { |
ec98f782 AG |
3908 | if (cmd_sg->length > task_size) |
3909 | break; | |
3910 | ||
3911 | *sg = *cmd_sg; | |
3912 | task_size -= cmd_sg->length; | |
3913 | cmd_sg = sg_next(cmd_sg); | |
c66ac9db | 3914 | } |
c66ac9db | 3915 | |
ec98f782 AG |
3916 | lba += task->task_sectors; |
3917 | sectors -= task->task_sectors; | |
c66ac9db | 3918 | |
ec98f782 AG |
3919 | spin_lock_irqsave(&cmd->t_state_lock, flags); |
3920 | list_add_tail(&task->t_list, &cmd->t_task_list); | |
3921 | spin_unlock_irqrestore(&cmd->t_state_lock, flags); | |
c66ac9db NB |
3922 | } |
3923 | ||
ec98f782 | 3924 | return task_count; |
c66ac9db NB |
3925 | } |
3926 | ||
3927 | static int | |
ec98f782 | 3928 | transport_allocate_control_task(struct se_cmd *cmd) |
c66ac9db | 3929 | { |
c66ac9db | 3930 | struct se_task *task; |
ec98f782 | 3931 | unsigned long flags; |
c66ac9db NB |
3932 | |
3933 | task = transport_generic_get_task(cmd, cmd->data_direction); | |
3934 | if (!task) | |
ec98f782 | 3935 | return -ENOMEM; |
c66ac9db | 3936 | |
af3f00c7 | 3937 | task->task_sg = cmd->t_data_sg; |
c66ac9db | 3938 | task->task_size = cmd->data_length; |
6708bb27 | 3939 | task->task_sg_nents = cmd->t_data_nents; |
c66ac9db | 3940 | |
ec98f782 AG |
3941 | spin_lock_irqsave(&cmd->t_state_lock, flags); |
3942 | list_add_tail(&task->t_list, &cmd->t_task_list); | |
3943 | spin_unlock_irqrestore(&cmd->t_state_lock, flags); | |
c66ac9db | 3944 | |
6708bb27 | 3945 | /* Success! Return number of tasks allocated */ |
a3eedc22 | 3946 | return 1; |
ec98f782 AG |
3947 | } |
3948 | ||
da0f7619 CH |
3949 | /* |
3950 | * Allocate any required ressources to execute the command, and either place | |
3951 | * it on the execution queue if possible. For writes we might not have the | |
3952 | * payload yet, thus notify the fabric via a call to ->write_pending instead. | |
c66ac9db | 3953 | */ |
a1d8b49a | 3954 | int transport_generic_new_cmd(struct se_cmd *cmd) |
c66ac9db | 3955 | { |
da0f7619 | 3956 | struct se_device *dev = cmd->se_dev; |
9ac54987 | 3957 | int task_cdbs, task_cdbs_bidi = 0; |
da0f7619 | 3958 | int set_counts = 1; |
c66ac9db NB |
3959 | int ret = 0; |
3960 | ||
3961 | /* | |
3962 | * Determine is the TCM fabric module has already allocated physical | |
3963 | * memory, and is directly calling transport_generic_map_mem_to_cmd() | |
ec98f782 | 3964 | * beforehand. |
c66ac9db | 3965 | */ |
ec98f782 AG |
3966 | if (!(cmd->se_cmd_flags & SCF_PASSTHROUGH_SG_TO_MEM_NOALLOC) && |
3967 | cmd->data_length) { | |
05d1c7c0 | 3968 | ret = transport_generic_get_mem(cmd); |
c66ac9db NB |
3969 | if (ret < 0) |
3970 | return ret; | |
3971 | } | |
da0f7619 | 3972 | |
1d20bb61 | 3973 | /* |
38b40067 | 3974 | * For BIDI command set up the read tasks first. |
1d20bb61 | 3975 | */ |
da0f7619 | 3976 | if (cmd->t_bidi_data_sg && |
38b40067 CH |
3977 | dev->transport->transport_type != TRANSPORT_PLUGIN_PHBA_PDEV) { |
3978 | BUG_ON(!(cmd->se_cmd_flags & SCF_SCSI_DATA_SG_IO_CDB)); | |
3979 | ||
9ac54987 NB |
3980 | task_cdbs_bidi = transport_allocate_data_tasks(cmd, |
3981 | DMA_FROM_DEVICE, cmd->t_bidi_data_sg, | |
3982 | cmd->t_bidi_data_nents); | |
3983 | if (task_cdbs_bidi <= 0) | |
da0f7619 CH |
3984 | goto out_fail; |
3985 | ||
3986 | atomic_inc(&cmd->t_fe_count); | |
3987 | atomic_inc(&cmd->t_se_count); | |
3988 | set_counts = 0; | |
3989 | } | |
38b40067 CH |
3990 | |
3991 | if (cmd->se_cmd_flags & SCF_SCSI_DATA_SG_IO_CDB) { | |
3992 | task_cdbs = transport_allocate_data_tasks(cmd, | |
3993 | cmd->data_direction, cmd->t_data_sg, | |
3994 | cmd->t_data_nents); | |
3995 | } else { | |
3996 | task_cdbs = transport_allocate_control_task(cmd); | |
3997 | } | |
3998 | ||
da0f7619 CH |
3999 | if (task_cdbs <= 0) |
4000 | goto out_fail; | |
4001 | ||
4002 | if (set_counts) { | |
4003 | atomic_inc(&cmd->t_fe_count); | |
4004 | atomic_inc(&cmd->t_se_count); | |
4005 | } | |
4006 | ||
9ac54987 NB |
4007 | cmd->t_task_list_num = (task_cdbs + task_cdbs_bidi); |
4008 | atomic_set(&cmd->t_task_cdbs_left, cmd->t_task_list_num); | |
4009 | atomic_set(&cmd->t_task_cdbs_ex_left, cmd->t_task_list_num); | |
4010 | atomic_set(&cmd->t_task_cdbs_timeout_left, cmd->t_task_list_num); | |
da0f7619 | 4011 | |
c66ac9db | 4012 | /* |
a1d8b49a | 4013 | * For WRITEs, let the fabric know its buffer is ready.. |
c66ac9db NB |
4014 | * This WRITE struct se_cmd (and all of its associated struct se_task's) |
4015 | * will be added to the struct se_device execution queue after its WRITE | |
4016 | * data has arrived. (ie: It gets handled by the transport processing | |
4017 | * thread a second time) | |
4018 | */ | |
4019 | if (cmd->data_direction == DMA_TO_DEVICE) { | |
4020 | transport_add_tasks_to_state_queue(cmd); | |
4021 | return transport_generic_write_pending(cmd); | |
4022 | } | |
4023 | /* | |
4024 | * Everything else but a WRITE, add the struct se_cmd's struct se_task's | |
4025 | * to the execution queue. | |
4026 | */ | |
4027 | transport_execute_tasks(cmd); | |
4028 | return 0; | |
da0f7619 CH |
4029 | |
4030 | out_fail: | |
4031 | cmd->se_cmd_flags |= SCF_SCSI_CDB_EXCEPTION; | |
4032 | cmd->scsi_sense_reason = TCM_LOGICAL_UNIT_COMMUNICATION_FAILURE; | |
4033 | return -EINVAL; | |
c66ac9db | 4034 | } |
a1d8b49a | 4035 | EXPORT_SYMBOL(transport_generic_new_cmd); |
c66ac9db NB |
4036 | |
4037 | /* transport_generic_process_write(): | |
4038 | * | |
4039 | * | |
4040 | */ | |
4041 | void transport_generic_process_write(struct se_cmd *cmd) | |
4042 | { | |
c66ac9db NB |
4043 | transport_execute_tasks(cmd); |
4044 | } | |
4045 | EXPORT_SYMBOL(transport_generic_process_write); | |
4046 | ||
e057f533 | 4047 | static void transport_write_pending_qf(struct se_cmd *cmd) |
07bde79a | 4048 | { |
e057f533 CH |
4049 | if (cmd->se_tfo->write_pending(cmd) == -EAGAIN) { |
4050 | pr_debug("Handling write_pending QUEUE__FULL: se_cmd: %p\n", | |
4051 | cmd); | |
4052 | transport_handle_queue_full(cmd, cmd->se_dev); | |
4053 | } | |
07bde79a NB |
4054 | } |
4055 | ||
c66ac9db NB |
4056 | static int transport_generic_write_pending(struct se_cmd *cmd) |
4057 | { | |
4058 | unsigned long flags; | |
4059 | int ret; | |
4060 | ||
a1d8b49a | 4061 | spin_lock_irqsave(&cmd->t_state_lock, flags); |
c66ac9db | 4062 | cmd->t_state = TRANSPORT_WRITE_PENDING; |
a1d8b49a | 4063 | spin_unlock_irqrestore(&cmd->t_state_lock, flags); |
07bde79a | 4064 | |
c66ac9db NB |
4065 | /* |
4066 | * Clear the se_cmd for WRITE_PENDING status in order to set | |
a1d8b49a | 4067 | * cmd->t_transport_active=0 so that transport_generic_handle_data |
c66ac9db | 4068 | * can be called from HW target mode interrupt code. This is safe |
e3d6f909 | 4069 | * to be called with transport_off=1 before the cmd->se_tfo->write_pending |
c66ac9db NB |
4070 | * because the se_cmd->se_lun pointer is not being cleared. |
4071 | */ | |
4072 | transport_cmd_check_stop(cmd, 1, 0); | |
4073 | ||
4074 | /* | |
4075 | * Call the fabric write_pending function here to let the | |
4076 | * frontend know that WRITE buffers are ready. | |
4077 | */ | |
e3d6f909 | 4078 | ret = cmd->se_tfo->write_pending(cmd); |
07bde79a NB |
4079 | if (ret == -EAGAIN) |
4080 | goto queue_full; | |
4081 | else if (ret < 0) | |
c66ac9db NB |
4082 | return ret; |
4083 | ||
4084 | return PYX_TRANSPORT_WRITE_PENDING; | |
07bde79a NB |
4085 | |
4086 | queue_full: | |
6708bb27 | 4087 | pr_debug("Handling write_pending QUEUE__FULL: se_cmd: %p\n", cmd); |
07bde79a | 4088 | cmd->t_state = TRANSPORT_COMPLETE_QF_WP; |
e057f533 | 4089 | transport_handle_queue_full(cmd, cmd->se_dev); |
07bde79a | 4090 | return ret; |
c66ac9db NB |
4091 | } |
4092 | ||
2dbc43d2 CH |
4093 | /** |
4094 | * transport_release_cmd - free a command | |
4095 | * @cmd: command to free | |
4096 | * | |
4097 | * This routine unconditionally frees a command, and reference counting | |
4098 | * or list removal must be done in the caller. | |
4099 | */ | |
35462975 | 4100 | void transport_release_cmd(struct se_cmd *cmd) |
c66ac9db | 4101 | { |
e3d6f909 | 4102 | BUG_ON(!cmd->se_tfo); |
c66ac9db | 4103 | |
2dbc43d2 CH |
4104 | if (cmd->se_tmr_req) |
4105 | core_tmr_release_req(cmd->se_tmr_req); | |
4106 | if (cmd->t_task_cdb != cmd->__t_task_cdb) | |
4107 | kfree(cmd->t_task_cdb); | |
35462975 | 4108 | cmd->se_tfo->release_cmd(cmd); |
c66ac9db | 4109 | } |
35462975 | 4110 | EXPORT_SYMBOL(transport_release_cmd); |
c66ac9db | 4111 | |
39c05f32 | 4112 | void transport_generic_free_cmd(struct se_cmd *cmd, int wait_for_tasks) |
c66ac9db | 4113 | { |
d14921d6 NB |
4114 | if (!(cmd->se_cmd_flags & SCF_SE_LUN_CMD)) { |
4115 | if (wait_for_tasks && cmd->se_tmr_req) | |
4116 | transport_wait_for_tasks(cmd); | |
4117 | ||
35462975 | 4118 | transport_release_cmd(cmd); |
d14921d6 NB |
4119 | } else { |
4120 | if (wait_for_tasks) | |
4121 | transport_wait_for_tasks(cmd); | |
4122 | ||
c66ac9db NB |
4123 | core_dec_lacl_count(cmd->se_sess->se_node_acl, cmd); |
4124 | ||
82f1c8a4 | 4125 | if (cmd->se_lun) |
c66ac9db | 4126 | transport_lun_remove_cmd(cmd); |
c66ac9db | 4127 | |
f4366772 NB |
4128 | transport_free_dev_tasks(cmd); |
4129 | ||
39c05f32 | 4130 | transport_put_cmd(cmd); |
c66ac9db NB |
4131 | } |
4132 | } | |
4133 | EXPORT_SYMBOL(transport_generic_free_cmd); | |
4134 | ||
c66ac9db NB |
4135 | /* transport_lun_wait_for_tasks(): |
4136 | * | |
4137 | * Called from ConfigFS context to stop the passed struct se_cmd to allow | |
4138 | * an struct se_lun to be successfully shutdown. | |
4139 | */ | |
4140 | static int transport_lun_wait_for_tasks(struct se_cmd *cmd, struct se_lun *lun) | |
4141 | { | |
4142 | unsigned long flags; | |
4143 | int ret; | |
4144 | /* | |
4145 | * If the frontend has already requested this struct se_cmd to | |
4146 | * be stopped, we can safely ignore this struct se_cmd. | |
4147 | */ | |
a1d8b49a AG |
4148 | spin_lock_irqsave(&cmd->t_state_lock, flags); |
4149 | if (atomic_read(&cmd->t_transport_stop)) { | |
4150 | atomic_set(&cmd->transport_lun_stop, 0); | |
6708bb27 | 4151 | pr_debug("ConfigFS ITT[0x%08x] - t_transport_stop ==" |
e3d6f909 | 4152 | " TRUE, skipping\n", cmd->se_tfo->get_task_tag(cmd)); |
a1d8b49a | 4153 | spin_unlock_irqrestore(&cmd->t_state_lock, flags); |
c66ac9db | 4154 | transport_cmd_check_stop(cmd, 1, 0); |
e3d6f909 | 4155 | return -EPERM; |
c66ac9db | 4156 | } |
a1d8b49a AG |
4157 | atomic_set(&cmd->transport_lun_fe_stop, 1); |
4158 | spin_unlock_irqrestore(&cmd->t_state_lock, flags); | |
c66ac9db | 4159 | |
5951146d | 4160 | wake_up_interruptible(&cmd->se_dev->dev_queue_obj.thread_wq); |
c66ac9db NB |
4161 | |
4162 | ret = transport_stop_tasks_for_cmd(cmd); | |
4163 | ||
6708bb27 AG |
4164 | pr_debug("ConfigFS: cmd: %p t_tasks: %d stop tasks ret:" |
4165 | " %d\n", cmd, cmd->t_task_list_num, ret); | |
c66ac9db | 4166 | if (!ret) { |
6708bb27 | 4167 | pr_debug("ConfigFS: ITT[0x%08x] - stopping cmd....\n", |
e3d6f909 | 4168 | cmd->se_tfo->get_task_tag(cmd)); |
a1d8b49a | 4169 | wait_for_completion(&cmd->transport_lun_stop_comp); |
6708bb27 | 4170 | pr_debug("ConfigFS: ITT[0x%08x] - stopped cmd....\n", |
e3d6f909 | 4171 | cmd->se_tfo->get_task_tag(cmd)); |
c66ac9db | 4172 | } |
3df8d40b | 4173 | transport_remove_cmd_from_queue(cmd); |
c66ac9db NB |
4174 | |
4175 | return 0; | |
4176 | } | |
4177 | ||
c66ac9db NB |
4178 | static void __transport_clear_lun_from_sessions(struct se_lun *lun) |
4179 | { | |
4180 | struct se_cmd *cmd = NULL; | |
4181 | unsigned long lun_flags, cmd_flags; | |
4182 | /* | |
4183 | * Do exception processing and return CHECK_CONDITION status to the | |
4184 | * Initiator Port. | |
4185 | */ | |
4186 | spin_lock_irqsave(&lun->lun_cmd_lock, lun_flags); | |
5951146d AG |
4187 | while (!list_empty(&lun->lun_cmd_list)) { |
4188 | cmd = list_first_entry(&lun->lun_cmd_list, | |
4189 | struct se_cmd, se_lun_node); | |
4190 | list_del(&cmd->se_lun_node); | |
4191 | ||
a1d8b49a | 4192 | atomic_set(&cmd->transport_lun_active, 0); |
c66ac9db NB |
4193 | /* |
4194 | * This will notify iscsi_target_transport.c: | |
4195 | * transport_cmd_check_stop() that a LUN shutdown is in | |
4196 | * progress for the iscsi_cmd_t. | |
4197 | */ | |
a1d8b49a | 4198 | spin_lock(&cmd->t_state_lock); |
6708bb27 | 4199 | pr_debug("SE_LUN[%d] - Setting cmd->transport" |
c66ac9db | 4200 | "_lun_stop for ITT: 0x%08x\n", |
e3d6f909 AG |
4201 | cmd->se_lun->unpacked_lun, |
4202 | cmd->se_tfo->get_task_tag(cmd)); | |
a1d8b49a AG |
4203 | atomic_set(&cmd->transport_lun_stop, 1); |
4204 | spin_unlock(&cmd->t_state_lock); | |
c66ac9db NB |
4205 | |
4206 | spin_unlock_irqrestore(&lun->lun_cmd_lock, lun_flags); | |
4207 | ||
6708bb27 AG |
4208 | if (!cmd->se_lun) { |
4209 | pr_err("ITT: 0x%08x, [i,t]_state: %u/%u\n", | |
e3d6f909 AG |
4210 | cmd->se_tfo->get_task_tag(cmd), |
4211 | cmd->se_tfo->get_cmd_state(cmd), cmd->t_state); | |
c66ac9db NB |
4212 | BUG(); |
4213 | } | |
4214 | /* | |
4215 | * If the Storage engine still owns the iscsi_cmd_t, determine | |
4216 | * and/or stop its context. | |
4217 | */ | |
6708bb27 | 4218 | pr_debug("SE_LUN[%d] - ITT: 0x%08x before transport" |
e3d6f909 AG |
4219 | "_lun_wait_for_tasks()\n", cmd->se_lun->unpacked_lun, |
4220 | cmd->se_tfo->get_task_tag(cmd)); | |
c66ac9db | 4221 | |
e3d6f909 | 4222 | if (transport_lun_wait_for_tasks(cmd, cmd->se_lun) < 0) { |
c66ac9db NB |
4223 | spin_lock_irqsave(&lun->lun_cmd_lock, lun_flags); |
4224 | continue; | |
4225 | } | |
4226 | ||
6708bb27 | 4227 | pr_debug("SE_LUN[%d] - ITT: 0x%08x after transport_lun" |
c66ac9db | 4228 | "_wait_for_tasks(): SUCCESS\n", |
e3d6f909 AG |
4229 | cmd->se_lun->unpacked_lun, |
4230 | cmd->se_tfo->get_task_tag(cmd)); | |
c66ac9db | 4231 | |
a1d8b49a | 4232 | spin_lock_irqsave(&cmd->t_state_lock, cmd_flags); |
6708bb27 | 4233 | if (!atomic_read(&cmd->transport_dev_active)) { |
a1d8b49a | 4234 | spin_unlock_irqrestore(&cmd->t_state_lock, cmd_flags); |
c66ac9db NB |
4235 | goto check_cond; |
4236 | } | |
a1d8b49a | 4237 | atomic_set(&cmd->transport_dev_active, 0); |
c66ac9db | 4238 | transport_all_task_dev_remove_state(cmd); |
a1d8b49a | 4239 | spin_unlock_irqrestore(&cmd->t_state_lock, cmd_flags); |
c66ac9db NB |
4240 | |
4241 | transport_free_dev_tasks(cmd); | |
4242 | /* | |
4243 | * The Storage engine stopped this struct se_cmd before it was | |
4244 | * send to the fabric frontend for delivery back to the | |
4245 | * Initiator Node. Return this SCSI CDB back with an | |
4246 | * CHECK_CONDITION status. | |
4247 | */ | |
4248 | check_cond: | |
4249 | transport_send_check_condition_and_sense(cmd, | |
4250 | TCM_NON_EXISTENT_LUN, 0); | |
4251 | /* | |
4252 | * If the fabric frontend is waiting for this iscsi_cmd_t to | |
4253 | * be released, notify the waiting thread now that LU has | |
4254 | * finished accessing it. | |
4255 | */ | |
a1d8b49a AG |
4256 | spin_lock_irqsave(&cmd->t_state_lock, cmd_flags); |
4257 | if (atomic_read(&cmd->transport_lun_fe_stop)) { | |
6708bb27 | 4258 | pr_debug("SE_LUN[%d] - Detected FE stop for" |
c66ac9db NB |
4259 | " struct se_cmd: %p ITT: 0x%08x\n", |
4260 | lun->unpacked_lun, | |
e3d6f909 | 4261 | cmd, cmd->se_tfo->get_task_tag(cmd)); |
c66ac9db | 4262 | |
a1d8b49a | 4263 | spin_unlock_irqrestore(&cmd->t_state_lock, |
c66ac9db NB |
4264 | cmd_flags); |
4265 | transport_cmd_check_stop(cmd, 1, 0); | |
a1d8b49a | 4266 | complete(&cmd->transport_lun_fe_stop_comp); |
c66ac9db NB |
4267 | spin_lock_irqsave(&lun->lun_cmd_lock, lun_flags); |
4268 | continue; | |
4269 | } | |
6708bb27 | 4270 | pr_debug("SE_LUN[%d] - ITT: 0x%08x finished processing\n", |
e3d6f909 | 4271 | lun->unpacked_lun, cmd->se_tfo->get_task_tag(cmd)); |
c66ac9db | 4272 | |
a1d8b49a | 4273 | spin_unlock_irqrestore(&cmd->t_state_lock, cmd_flags); |
c66ac9db NB |
4274 | spin_lock_irqsave(&lun->lun_cmd_lock, lun_flags); |
4275 | } | |
4276 | spin_unlock_irqrestore(&lun->lun_cmd_lock, lun_flags); | |
4277 | } | |
4278 | ||
4279 | static int transport_clear_lun_thread(void *p) | |
4280 | { | |
4281 | struct se_lun *lun = (struct se_lun *)p; | |
4282 | ||
4283 | __transport_clear_lun_from_sessions(lun); | |
4284 | complete(&lun->lun_shutdown_comp); | |
4285 | ||
4286 | return 0; | |
4287 | } | |
4288 | ||
4289 | int transport_clear_lun_from_sessions(struct se_lun *lun) | |
4290 | { | |
4291 | struct task_struct *kt; | |
4292 | ||
5951146d | 4293 | kt = kthread_run(transport_clear_lun_thread, lun, |
c66ac9db NB |
4294 | "tcm_cl_%u", lun->unpacked_lun); |
4295 | if (IS_ERR(kt)) { | |
6708bb27 | 4296 | pr_err("Unable to start clear_lun thread\n"); |
e3d6f909 | 4297 | return PTR_ERR(kt); |
c66ac9db NB |
4298 | } |
4299 | wait_for_completion(&lun->lun_shutdown_comp); | |
4300 | ||
4301 | return 0; | |
4302 | } | |
4303 | ||
d14921d6 NB |
4304 | /** |
4305 | * transport_wait_for_tasks - wait for completion to occur | |
4306 | * @cmd: command to wait | |
c66ac9db | 4307 | * |
d14921d6 NB |
4308 | * Called from frontend fabric context to wait for storage engine |
4309 | * to pause and/or release frontend generated struct se_cmd. | |
c66ac9db | 4310 | */ |
d14921d6 | 4311 | void transport_wait_for_tasks(struct se_cmd *cmd) |
c66ac9db NB |
4312 | { |
4313 | unsigned long flags; | |
4314 | ||
a1d8b49a | 4315 | spin_lock_irqsave(&cmd->t_state_lock, flags); |
d14921d6 NB |
4316 | if (!(cmd->se_cmd_flags & SCF_SE_LUN_CMD) && !(cmd->se_tmr_req)) { |
4317 | spin_unlock_irqrestore(&cmd->t_state_lock, flags); | |
4318 | return; | |
4319 | } | |
4320 | /* | |
4321 | * Only perform a possible wait_for_tasks if SCF_SUPPORTED_SAM_OPCODE | |
4322 | * has been set in transport_set_supported_SAM_opcode(). | |
4323 | */ | |
4324 | if (!(cmd->se_cmd_flags & SCF_SUPPORTED_SAM_OPCODE) && !cmd->se_tmr_req) { | |
4325 | spin_unlock_irqrestore(&cmd->t_state_lock, flags); | |
4326 | return; | |
4327 | } | |
c66ac9db NB |
4328 | /* |
4329 | * If we are already stopped due to an external event (ie: LUN shutdown) | |
4330 | * sleep until the connection can have the passed struct se_cmd back. | |
a1d8b49a | 4331 | * The cmd->transport_lun_stopped_sem will be upped by |
c66ac9db NB |
4332 | * transport_clear_lun_from_sessions() once the ConfigFS context caller |
4333 | * has completed its operation on the struct se_cmd. | |
4334 | */ | |
a1d8b49a | 4335 | if (atomic_read(&cmd->transport_lun_stop)) { |
c66ac9db | 4336 | |
6708bb27 | 4337 | pr_debug("wait_for_tasks: Stopping" |
e3d6f909 | 4338 | " wait_for_completion(&cmd->t_tasktransport_lun_fe" |
c66ac9db | 4339 | "_stop_comp); for ITT: 0x%08x\n", |
e3d6f909 | 4340 | cmd->se_tfo->get_task_tag(cmd)); |
c66ac9db NB |
4341 | /* |
4342 | * There is a special case for WRITES where a FE exception + | |
4343 | * LUN shutdown means ConfigFS context is still sleeping on | |
4344 | * transport_lun_stop_comp in transport_lun_wait_for_tasks(). | |
4345 | * We go ahead and up transport_lun_stop_comp just to be sure | |
4346 | * here. | |
4347 | */ | |
a1d8b49a AG |
4348 | spin_unlock_irqrestore(&cmd->t_state_lock, flags); |
4349 | complete(&cmd->transport_lun_stop_comp); | |
4350 | wait_for_completion(&cmd->transport_lun_fe_stop_comp); | |
4351 | spin_lock_irqsave(&cmd->t_state_lock, flags); | |
c66ac9db NB |
4352 | |
4353 | transport_all_task_dev_remove_state(cmd); | |
4354 | /* | |
4355 | * At this point, the frontend who was the originator of this | |
4356 | * struct se_cmd, now owns the structure and can be released through | |
4357 | * normal means below. | |
4358 | */ | |
6708bb27 | 4359 | pr_debug("wait_for_tasks: Stopped" |
e3d6f909 | 4360 | " wait_for_completion(&cmd->t_tasktransport_lun_fe_" |
c66ac9db | 4361 | "stop_comp); for ITT: 0x%08x\n", |
e3d6f909 | 4362 | cmd->se_tfo->get_task_tag(cmd)); |
c66ac9db | 4363 | |
a1d8b49a | 4364 | atomic_set(&cmd->transport_lun_stop, 0); |
c66ac9db | 4365 | } |
a1d8b49a | 4366 | if (!atomic_read(&cmd->t_transport_active) || |
d14921d6 NB |
4367 | atomic_read(&cmd->t_transport_aborted)) { |
4368 | spin_unlock_irqrestore(&cmd->t_state_lock, flags); | |
4369 | return; | |
4370 | } | |
c66ac9db | 4371 | |
a1d8b49a | 4372 | atomic_set(&cmd->t_transport_stop, 1); |
c66ac9db | 4373 | |
6708bb27 | 4374 | pr_debug("wait_for_tasks: Stopping %p ITT: 0x%08x" |
f2da9dbd CH |
4375 | " i_state: %d, t_state: %d, t_transport_stop = TRUE\n", |
4376 | cmd, cmd->se_tfo->get_task_tag(cmd), | |
4377 | cmd->se_tfo->get_cmd_state(cmd), cmd->t_state); | |
c66ac9db | 4378 | |
a1d8b49a | 4379 | spin_unlock_irqrestore(&cmd->t_state_lock, flags); |
c66ac9db | 4380 | |
5951146d | 4381 | wake_up_interruptible(&cmd->se_dev->dev_queue_obj.thread_wq); |
c66ac9db | 4382 | |
a1d8b49a | 4383 | wait_for_completion(&cmd->t_transport_stop_comp); |
c66ac9db | 4384 | |
a1d8b49a AG |
4385 | spin_lock_irqsave(&cmd->t_state_lock, flags); |
4386 | atomic_set(&cmd->t_transport_active, 0); | |
4387 | atomic_set(&cmd->t_transport_stop, 0); | |
c66ac9db | 4388 | |
6708bb27 | 4389 | pr_debug("wait_for_tasks: Stopped wait_for_compltion(" |
a1d8b49a | 4390 | "&cmd->t_transport_stop_comp) for ITT: 0x%08x\n", |
e3d6f909 | 4391 | cmd->se_tfo->get_task_tag(cmd)); |
c66ac9db | 4392 | |
d14921d6 | 4393 | spin_unlock_irqrestore(&cmd->t_state_lock, flags); |
c66ac9db | 4394 | } |
d14921d6 | 4395 | EXPORT_SYMBOL(transport_wait_for_tasks); |
c66ac9db NB |
4396 | |
4397 | static int transport_get_sense_codes( | |
4398 | struct se_cmd *cmd, | |
4399 | u8 *asc, | |
4400 | u8 *ascq) | |
4401 | { | |
4402 | *asc = cmd->scsi_asc; | |
4403 | *ascq = cmd->scsi_ascq; | |
4404 | ||
4405 | return 0; | |
4406 | } | |
4407 | ||
4408 | static int transport_set_sense_codes( | |
4409 | struct se_cmd *cmd, | |
4410 | u8 asc, | |
4411 | u8 ascq) | |
4412 | { | |
4413 | cmd->scsi_asc = asc; | |
4414 | cmd->scsi_ascq = ascq; | |
4415 | ||
4416 | return 0; | |
4417 | } | |
4418 | ||
4419 | int transport_send_check_condition_and_sense( | |
4420 | struct se_cmd *cmd, | |
4421 | u8 reason, | |
4422 | int from_transport) | |
4423 | { | |
4424 | unsigned char *buffer = cmd->sense_buffer; | |
4425 | unsigned long flags; | |
4426 | int offset; | |
4427 | u8 asc = 0, ascq = 0; | |
4428 | ||
a1d8b49a | 4429 | spin_lock_irqsave(&cmd->t_state_lock, flags); |
c66ac9db | 4430 | if (cmd->se_cmd_flags & SCF_SENT_CHECK_CONDITION) { |
a1d8b49a | 4431 | spin_unlock_irqrestore(&cmd->t_state_lock, flags); |
c66ac9db NB |
4432 | return 0; |
4433 | } | |
4434 | cmd->se_cmd_flags |= SCF_SENT_CHECK_CONDITION; | |
a1d8b49a | 4435 | spin_unlock_irqrestore(&cmd->t_state_lock, flags); |
c66ac9db NB |
4436 | |
4437 | if (!reason && from_transport) | |
4438 | goto after_reason; | |
4439 | ||
4440 | if (!from_transport) | |
4441 | cmd->se_cmd_flags |= SCF_EMULATED_TASK_SENSE; | |
4442 | /* | |
4443 | * Data Segment and SenseLength of the fabric response PDU. | |
4444 | * | |
4445 | * TRANSPORT_SENSE_BUFFER is now set to SCSI_SENSE_BUFFERSIZE | |
4446 | * from include/scsi/scsi_cmnd.h | |
4447 | */ | |
e3d6f909 | 4448 | offset = cmd->se_tfo->set_fabric_sense_len(cmd, |
c66ac9db NB |
4449 | TRANSPORT_SENSE_BUFFER); |
4450 | /* | |
4451 | * Actual SENSE DATA, see SPC-3 7.23.2 SPC_SENSE_KEY_OFFSET uses | |
4452 | * SENSE KEY values from include/scsi/scsi.h | |
4453 | */ | |
4454 | switch (reason) { | |
4455 | case TCM_NON_EXISTENT_LUN: | |
eb39d340 NB |
4456 | /* CURRENT ERROR */ |
4457 | buffer[offset] = 0x70; | |
4458 | /* ILLEGAL REQUEST */ | |
4459 | buffer[offset+SPC_SENSE_KEY_OFFSET] = ILLEGAL_REQUEST; | |
4460 | /* LOGICAL UNIT NOT SUPPORTED */ | |
4461 | buffer[offset+SPC_ASC_KEY_OFFSET] = 0x25; | |
4462 | break; | |
c66ac9db NB |
4463 | case TCM_UNSUPPORTED_SCSI_OPCODE: |
4464 | case TCM_SECTOR_COUNT_TOO_MANY: | |
4465 | /* CURRENT ERROR */ | |
4466 | buffer[offset] = 0x70; | |
4467 | /* ILLEGAL REQUEST */ | |
4468 | buffer[offset+SPC_SENSE_KEY_OFFSET] = ILLEGAL_REQUEST; | |
4469 | /* INVALID COMMAND OPERATION CODE */ | |
4470 | buffer[offset+SPC_ASC_KEY_OFFSET] = 0x20; | |
4471 | break; | |
4472 | case TCM_UNKNOWN_MODE_PAGE: | |
4473 | /* CURRENT ERROR */ | |
4474 | buffer[offset] = 0x70; | |
4475 | /* ILLEGAL REQUEST */ | |
4476 | buffer[offset+SPC_SENSE_KEY_OFFSET] = ILLEGAL_REQUEST; | |
4477 | /* INVALID FIELD IN CDB */ | |
4478 | buffer[offset+SPC_ASC_KEY_OFFSET] = 0x24; | |
4479 | break; | |
4480 | case TCM_CHECK_CONDITION_ABORT_CMD: | |
4481 | /* CURRENT ERROR */ | |
4482 | buffer[offset] = 0x70; | |
4483 | /* ABORTED COMMAND */ | |
4484 | buffer[offset+SPC_SENSE_KEY_OFFSET] = ABORTED_COMMAND; | |
4485 | /* BUS DEVICE RESET FUNCTION OCCURRED */ | |
4486 | buffer[offset+SPC_ASC_KEY_OFFSET] = 0x29; | |
4487 | buffer[offset+SPC_ASCQ_KEY_OFFSET] = 0x03; | |
4488 | break; | |
4489 | case TCM_INCORRECT_AMOUNT_OF_DATA: | |
4490 | /* CURRENT ERROR */ | |
4491 | buffer[offset] = 0x70; | |
4492 | /* ABORTED COMMAND */ | |
4493 | buffer[offset+SPC_SENSE_KEY_OFFSET] = ABORTED_COMMAND; | |
4494 | /* WRITE ERROR */ | |
4495 | buffer[offset+SPC_ASC_KEY_OFFSET] = 0x0c; | |
4496 | /* NOT ENOUGH UNSOLICITED DATA */ | |
4497 | buffer[offset+SPC_ASCQ_KEY_OFFSET] = 0x0d; | |
4498 | break; | |
4499 | case TCM_INVALID_CDB_FIELD: | |
4500 | /* CURRENT ERROR */ | |
4501 | buffer[offset] = 0x70; | |
4502 | /* ABORTED COMMAND */ | |
4503 | buffer[offset+SPC_SENSE_KEY_OFFSET] = ABORTED_COMMAND; | |
4504 | /* INVALID FIELD IN CDB */ | |
4505 | buffer[offset+SPC_ASC_KEY_OFFSET] = 0x24; | |
4506 | break; | |
4507 | case TCM_INVALID_PARAMETER_LIST: | |
4508 | /* CURRENT ERROR */ | |
4509 | buffer[offset] = 0x70; | |
4510 | /* ABORTED COMMAND */ | |
4511 | buffer[offset+SPC_SENSE_KEY_OFFSET] = ABORTED_COMMAND; | |
4512 | /* INVALID FIELD IN PARAMETER LIST */ | |
4513 | buffer[offset+SPC_ASC_KEY_OFFSET] = 0x26; | |
4514 | break; | |
4515 | case TCM_UNEXPECTED_UNSOLICITED_DATA: | |
4516 | /* CURRENT ERROR */ | |
4517 | buffer[offset] = 0x70; | |
4518 | /* ABORTED COMMAND */ | |
4519 | buffer[offset+SPC_SENSE_KEY_OFFSET] = ABORTED_COMMAND; | |
4520 | /* WRITE ERROR */ | |
4521 | buffer[offset+SPC_ASC_KEY_OFFSET] = 0x0c; | |
4522 | /* UNEXPECTED_UNSOLICITED_DATA */ | |
4523 | buffer[offset+SPC_ASCQ_KEY_OFFSET] = 0x0c; | |
4524 | break; | |
4525 | case TCM_SERVICE_CRC_ERROR: | |
4526 | /* CURRENT ERROR */ | |
4527 | buffer[offset] = 0x70; | |
4528 | /* ABORTED COMMAND */ | |
4529 | buffer[offset+SPC_SENSE_KEY_OFFSET] = ABORTED_COMMAND; | |
4530 | /* PROTOCOL SERVICE CRC ERROR */ | |
4531 | buffer[offset+SPC_ASC_KEY_OFFSET] = 0x47; | |
4532 | /* N/A */ | |
4533 | buffer[offset+SPC_ASCQ_KEY_OFFSET] = 0x05; | |
4534 | break; | |
4535 | case TCM_SNACK_REJECTED: | |
4536 | /* CURRENT ERROR */ | |
4537 | buffer[offset] = 0x70; | |
4538 | /* ABORTED COMMAND */ | |
4539 | buffer[offset+SPC_SENSE_KEY_OFFSET] = ABORTED_COMMAND; | |
4540 | /* READ ERROR */ | |
4541 | buffer[offset+SPC_ASC_KEY_OFFSET] = 0x11; | |
4542 | /* FAILED RETRANSMISSION REQUEST */ | |
4543 | buffer[offset+SPC_ASCQ_KEY_OFFSET] = 0x13; | |
4544 | break; | |
4545 | case TCM_WRITE_PROTECTED: | |
4546 | /* CURRENT ERROR */ | |
4547 | buffer[offset] = 0x70; | |
4548 | /* DATA PROTECT */ | |
4549 | buffer[offset+SPC_SENSE_KEY_OFFSET] = DATA_PROTECT; | |
4550 | /* WRITE PROTECTED */ | |
4551 | buffer[offset+SPC_ASC_KEY_OFFSET] = 0x27; | |
4552 | break; | |
4553 | case TCM_CHECK_CONDITION_UNIT_ATTENTION: | |
4554 | /* CURRENT ERROR */ | |
4555 | buffer[offset] = 0x70; | |
4556 | /* UNIT ATTENTION */ | |
4557 | buffer[offset+SPC_SENSE_KEY_OFFSET] = UNIT_ATTENTION; | |
4558 | core_scsi3_ua_for_check_condition(cmd, &asc, &ascq); | |
4559 | buffer[offset+SPC_ASC_KEY_OFFSET] = asc; | |
4560 | buffer[offset+SPC_ASCQ_KEY_OFFSET] = ascq; | |
4561 | break; | |
4562 | case TCM_CHECK_CONDITION_NOT_READY: | |
4563 | /* CURRENT ERROR */ | |
4564 | buffer[offset] = 0x70; | |
4565 | /* Not Ready */ | |
4566 | buffer[offset+SPC_SENSE_KEY_OFFSET] = NOT_READY; | |
4567 | transport_get_sense_codes(cmd, &asc, &ascq); | |
4568 | buffer[offset+SPC_ASC_KEY_OFFSET] = asc; | |
4569 | buffer[offset+SPC_ASCQ_KEY_OFFSET] = ascq; | |
4570 | break; | |
4571 | case TCM_LOGICAL_UNIT_COMMUNICATION_FAILURE: | |
4572 | default: | |
4573 | /* CURRENT ERROR */ | |
4574 | buffer[offset] = 0x70; | |
4575 | /* ILLEGAL REQUEST */ | |
4576 | buffer[offset+SPC_SENSE_KEY_OFFSET] = ILLEGAL_REQUEST; | |
4577 | /* LOGICAL UNIT COMMUNICATION FAILURE */ | |
4578 | buffer[offset+SPC_ASC_KEY_OFFSET] = 0x80; | |
4579 | break; | |
4580 | } | |
4581 | /* | |
4582 | * This code uses linux/include/scsi/scsi.h SAM status codes! | |
4583 | */ | |
4584 | cmd->scsi_status = SAM_STAT_CHECK_CONDITION; | |
4585 | /* | |
4586 | * Automatically padded, this value is encoded in the fabric's | |
4587 | * data_length response PDU containing the SCSI defined sense data. | |
4588 | */ | |
4589 | cmd->scsi_sense_length = TRANSPORT_SENSE_BUFFER + offset; | |
4590 | ||
4591 | after_reason: | |
07bde79a | 4592 | return cmd->se_tfo->queue_status(cmd); |
c66ac9db NB |
4593 | } |
4594 | EXPORT_SYMBOL(transport_send_check_condition_and_sense); | |
4595 | ||
4596 | int transport_check_aborted_status(struct se_cmd *cmd, int send_status) | |
4597 | { | |
4598 | int ret = 0; | |
4599 | ||
a1d8b49a | 4600 | if (atomic_read(&cmd->t_transport_aborted) != 0) { |
6708bb27 | 4601 | if (!send_status || |
c66ac9db NB |
4602 | (cmd->se_cmd_flags & SCF_SENT_DELAYED_TAS)) |
4603 | return 1; | |
4604 | #if 0 | |
6708bb27 | 4605 | pr_debug("Sending delayed SAM_STAT_TASK_ABORTED" |
c66ac9db | 4606 | " status for CDB: 0x%02x ITT: 0x%08x\n", |
a1d8b49a | 4607 | cmd->t_task_cdb[0], |
e3d6f909 | 4608 | cmd->se_tfo->get_task_tag(cmd)); |
c66ac9db NB |
4609 | #endif |
4610 | cmd->se_cmd_flags |= SCF_SENT_DELAYED_TAS; | |
e3d6f909 | 4611 | cmd->se_tfo->queue_status(cmd); |
c66ac9db NB |
4612 | ret = 1; |
4613 | } | |
4614 | return ret; | |
4615 | } | |
4616 | EXPORT_SYMBOL(transport_check_aborted_status); | |
4617 | ||
4618 | void transport_send_task_abort(struct se_cmd *cmd) | |
4619 | { | |
c252f003 NB |
4620 | unsigned long flags; |
4621 | ||
4622 | spin_lock_irqsave(&cmd->t_state_lock, flags); | |
4623 | if (cmd->se_cmd_flags & SCF_SENT_CHECK_CONDITION) { | |
4624 | spin_unlock_irqrestore(&cmd->t_state_lock, flags); | |
4625 | return; | |
4626 | } | |
4627 | spin_unlock_irqrestore(&cmd->t_state_lock, flags); | |
4628 | ||
c66ac9db NB |
4629 | /* |
4630 | * If there are still expected incoming fabric WRITEs, we wait | |
4631 | * until until they have completed before sending a TASK_ABORTED | |
4632 | * response. This response with TASK_ABORTED status will be | |
4633 | * queued back to fabric module by transport_check_aborted_status(). | |
4634 | */ | |
4635 | if (cmd->data_direction == DMA_TO_DEVICE) { | |
e3d6f909 | 4636 | if (cmd->se_tfo->write_pending_status(cmd) != 0) { |
a1d8b49a | 4637 | atomic_inc(&cmd->t_transport_aborted); |
c66ac9db NB |
4638 | smp_mb__after_atomic_inc(); |
4639 | cmd->scsi_status = SAM_STAT_TASK_ABORTED; | |
4640 | transport_new_cmd_failure(cmd); | |
4641 | return; | |
4642 | } | |
4643 | } | |
4644 | cmd->scsi_status = SAM_STAT_TASK_ABORTED; | |
4645 | #if 0 | |
6708bb27 | 4646 | pr_debug("Setting SAM_STAT_TASK_ABORTED status for CDB: 0x%02x," |
a1d8b49a | 4647 | " ITT: 0x%08x\n", cmd->t_task_cdb[0], |
e3d6f909 | 4648 | cmd->se_tfo->get_task_tag(cmd)); |
c66ac9db | 4649 | #endif |
e3d6f909 | 4650 | cmd->se_tfo->queue_status(cmd); |
c66ac9db NB |
4651 | } |
4652 | ||
4653 | /* transport_generic_do_tmr(): | |
4654 | * | |
4655 | * | |
4656 | */ | |
4657 | int transport_generic_do_tmr(struct se_cmd *cmd) | |
4658 | { | |
5951146d | 4659 | struct se_device *dev = cmd->se_dev; |
c66ac9db NB |
4660 | struct se_tmr_req *tmr = cmd->se_tmr_req; |
4661 | int ret; | |
4662 | ||
4663 | switch (tmr->function) { | |
5c6cd613 | 4664 | case TMR_ABORT_TASK: |
c66ac9db NB |
4665 | tmr->response = TMR_FUNCTION_REJECTED; |
4666 | break; | |
5c6cd613 NB |
4667 | case TMR_ABORT_TASK_SET: |
4668 | case TMR_CLEAR_ACA: | |
4669 | case TMR_CLEAR_TASK_SET: | |
c66ac9db NB |
4670 | tmr->response = TMR_TASK_MGMT_FUNCTION_NOT_SUPPORTED; |
4671 | break; | |
5c6cd613 | 4672 | case TMR_LUN_RESET: |
c66ac9db NB |
4673 | ret = core_tmr_lun_reset(dev, tmr, NULL, NULL); |
4674 | tmr->response = (!ret) ? TMR_FUNCTION_COMPLETE : | |
4675 | TMR_FUNCTION_REJECTED; | |
4676 | break; | |
5c6cd613 | 4677 | case TMR_TARGET_WARM_RESET: |
c66ac9db NB |
4678 | tmr->response = TMR_FUNCTION_REJECTED; |
4679 | break; | |
5c6cd613 | 4680 | case TMR_TARGET_COLD_RESET: |
c66ac9db NB |
4681 | tmr->response = TMR_FUNCTION_REJECTED; |
4682 | break; | |
c66ac9db | 4683 | default: |
6708bb27 | 4684 | pr_err("Uknown TMR function: 0x%02x.\n", |
c66ac9db NB |
4685 | tmr->function); |
4686 | tmr->response = TMR_FUNCTION_REJECTED; | |
4687 | break; | |
4688 | } | |
4689 | ||
4690 | cmd->t_state = TRANSPORT_ISTATE_PROCESSING; | |
e3d6f909 | 4691 | cmd->se_tfo->queue_tm_rsp(cmd); |
c66ac9db | 4692 | |
b7b8bef7 | 4693 | transport_cmd_check_stop_to_fabric(cmd); |
c66ac9db NB |
4694 | return 0; |
4695 | } | |
4696 | ||
c66ac9db NB |
4697 | /* transport_processing_thread(): |
4698 | * | |
4699 | * | |
4700 | */ | |
4701 | static int transport_processing_thread(void *param) | |
4702 | { | |
5951146d | 4703 | int ret; |
c66ac9db NB |
4704 | struct se_cmd *cmd; |
4705 | struct se_device *dev = (struct se_device *) param; | |
c66ac9db NB |
4706 | |
4707 | set_user_nice(current, -20); | |
4708 | ||
4709 | while (!kthread_should_stop()) { | |
e3d6f909 AG |
4710 | ret = wait_event_interruptible(dev->dev_queue_obj.thread_wq, |
4711 | atomic_read(&dev->dev_queue_obj.queue_cnt) || | |
c66ac9db NB |
4712 | kthread_should_stop()); |
4713 | if (ret < 0) | |
4714 | goto out; | |
4715 | ||
c66ac9db NB |
4716 | get_cmd: |
4717 | __transport_execute_tasks(dev); | |
4718 | ||
5951146d AG |
4719 | cmd = transport_get_cmd_from_queue(&dev->dev_queue_obj); |
4720 | if (!cmd) | |
c66ac9db NB |
4721 | continue; |
4722 | ||
5951146d | 4723 | switch (cmd->t_state) { |
680b73c5 CH |
4724 | case TRANSPORT_NEW_CMD: |
4725 | BUG(); | |
4726 | break; | |
c66ac9db | 4727 | case TRANSPORT_NEW_CMD_MAP: |
6708bb27 AG |
4728 | if (!cmd->se_tfo->new_cmd_map) { |
4729 | pr_err("cmd->se_tfo->new_cmd_map is" | |
c66ac9db NB |
4730 | " NULL for TRANSPORT_NEW_CMD_MAP\n"); |
4731 | BUG(); | |
4732 | } | |
e3d6f909 | 4733 | ret = cmd->se_tfo->new_cmd_map(cmd); |
c66ac9db NB |
4734 | if (ret < 0) { |
4735 | cmd->transport_error_status = ret; | |
4499dda8 | 4736 | transport_generic_request_failure(cmd, |
c66ac9db NB |
4737 | 0, (cmd->data_direction != |
4738 | DMA_TO_DEVICE)); | |
4739 | break; | |
4740 | } | |
c66ac9db | 4741 | ret = transport_generic_new_cmd(cmd); |
07bde79a NB |
4742 | if (ret == -EAGAIN) |
4743 | break; | |
4744 | else if (ret < 0) { | |
c66ac9db | 4745 | cmd->transport_error_status = ret; |
4499dda8 | 4746 | transport_generic_request_failure(cmd, |
c66ac9db NB |
4747 | 0, (cmd->data_direction != |
4748 | DMA_TO_DEVICE)); | |
4749 | } | |
4750 | break; | |
4751 | case TRANSPORT_PROCESS_WRITE: | |
4752 | transport_generic_process_write(cmd); | |
4753 | break; | |
f4366772 | 4754 | case TRANSPORT_FREE_CMD_INTR: |
82f1c8a4 | 4755 | transport_generic_free_cmd(cmd, 0); |
f4366772 | 4756 | break; |
c66ac9db NB |
4757 | case TRANSPORT_PROCESS_TMR: |
4758 | transport_generic_do_tmr(cmd); | |
4759 | break; | |
07bde79a | 4760 | case TRANSPORT_COMPLETE_QF_WP: |
e057f533 CH |
4761 | transport_write_pending_qf(cmd); |
4762 | break; | |
4763 | case TRANSPORT_COMPLETE_QF_OK: | |
4764 | transport_complete_qf(cmd); | |
07bde79a | 4765 | break; |
c66ac9db | 4766 | default: |
f2da9dbd CH |
4767 | pr_err("Unknown t_state: %d for ITT: 0x%08x " |
4768 | "i_state: %d on SE LUN: %u\n", | |
4769 | cmd->t_state, | |
e3d6f909 AG |
4770 | cmd->se_tfo->get_task_tag(cmd), |
4771 | cmd->se_tfo->get_cmd_state(cmd), | |
4772 | cmd->se_lun->unpacked_lun); | |
c66ac9db NB |
4773 | BUG(); |
4774 | } | |
4775 | ||
4776 | goto get_cmd; | |
4777 | } | |
4778 | ||
4779 | out: | |
ce8762f6 NB |
4780 | WARN_ON(!list_empty(&dev->state_task_list)); |
4781 | WARN_ON(!list_empty(&dev->dev_queue_obj.qobj_list)); | |
c66ac9db NB |
4782 | dev->process_thread = NULL; |
4783 | return 0; | |
4784 | } |