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c66ac9db NB |
1 | /******************************************************************************* |
2 | * Filename: target_core_transport.c | |
3 | * | |
4 | * This file contains the Generic Target Engine Core. | |
5 | * | |
6 | * Copyright (c) 2002, 2003, 2004, 2005 PyX Technologies, Inc. | |
7 | * Copyright (c) 2005, 2006, 2007 SBE, Inc. | |
8 | * Copyright (c) 2007-2010 Rising Tide Systems | |
9 | * Copyright (c) 2008-2010 Linux-iSCSI.org | |
10 | * | |
11 | * Nicholas A. Bellinger <nab@kernel.org> | |
12 | * | |
13 | * This program is free software; you can redistribute it and/or modify | |
14 | * it under the terms of the GNU General Public License as published by | |
15 | * the Free Software Foundation; either version 2 of the License, or | |
16 | * (at your option) any later version. | |
17 | * | |
18 | * This program is distributed in the hope that it will be useful, | |
19 | * but WITHOUT ANY WARRANTY; without even the implied warranty of | |
20 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
21 | * GNU General Public License for more details. | |
22 | * | |
23 | * You should have received a copy of the GNU General Public License | |
24 | * along with this program; if not, write to the Free Software | |
25 | * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. | |
26 | * | |
27 | ******************************************************************************/ | |
28 | ||
29 | #include <linux/version.h> | |
30 | #include <linux/net.h> | |
31 | #include <linux/delay.h> | |
32 | #include <linux/string.h> | |
33 | #include <linux/timer.h> | |
34 | #include <linux/slab.h> | |
35 | #include <linux/blkdev.h> | |
36 | #include <linux/spinlock.h> | |
c66ac9db NB |
37 | #include <linux/kthread.h> |
38 | #include <linux/in.h> | |
39 | #include <linux/cdrom.h> | |
40 | #include <asm/unaligned.h> | |
41 | #include <net/sock.h> | |
42 | #include <net/tcp.h> | |
43 | #include <scsi/scsi.h> | |
44 | #include <scsi/scsi_cmnd.h> | |
e66ecd50 | 45 | #include <scsi/scsi_tcq.h> |
c66ac9db NB |
46 | |
47 | #include <target/target_core_base.h> | |
48 | #include <target/target_core_device.h> | |
49 | #include <target/target_core_tmr.h> | |
50 | #include <target/target_core_tpg.h> | |
51 | #include <target/target_core_transport.h> | |
52 | #include <target/target_core_fabric_ops.h> | |
53 | #include <target/target_core_configfs.h> | |
54 | ||
55 | #include "target_core_alua.h" | |
56 | #include "target_core_hba.h" | |
57 | #include "target_core_pr.h" | |
58 | #include "target_core_scdb.h" | |
59 | #include "target_core_ua.h" | |
60 | ||
61 | /* #define DEBUG_CDB_HANDLER */ | |
62 | #ifdef DEBUG_CDB_HANDLER | |
63 | #define DEBUG_CDB_H(x...) printk(KERN_INFO x) | |
64 | #else | |
65 | #define DEBUG_CDB_H(x...) | |
66 | #endif | |
67 | ||
68 | /* #define DEBUG_CMD_MAP */ | |
69 | #ifdef DEBUG_CMD_MAP | |
70 | #define DEBUG_CMD_M(x...) printk(KERN_INFO x) | |
71 | #else | |
72 | #define DEBUG_CMD_M(x...) | |
73 | #endif | |
74 | ||
75 | /* #define DEBUG_MEM_ALLOC */ | |
76 | #ifdef DEBUG_MEM_ALLOC | |
77 | #define DEBUG_MEM(x...) printk(KERN_INFO x) | |
78 | #else | |
79 | #define DEBUG_MEM(x...) | |
80 | #endif | |
81 | ||
82 | /* #define DEBUG_MEM2_ALLOC */ | |
83 | #ifdef DEBUG_MEM2_ALLOC | |
84 | #define DEBUG_MEM2(x...) printk(KERN_INFO x) | |
85 | #else | |
86 | #define DEBUG_MEM2(x...) | |
87 | #endif | |
88 | ||
89 | /* #define DEBUG_SG_CALC */ | |
90 | #ifdef DEBUG_SG_CALC | |
91 | #define DEBUG_SC(x...) printk(KERN_INFO x) | |
92 | #else | |
93 | #define DEBUG_SC(x...) | |
94 | #endif | |
95 | ||
96 | /* #define DEBUG_SE_OBJ */ | |
97 | #ifdef DEBUG_SE_OBJ | |
98 | #define DEBUG_SO(x...) printk(KERN_INFO x) | |
99 | #else | |
100 | #define DEBUG_SO(x...) | |
101 | #endif | |
102 | ||
103 | /* #define DEBUG_CMD_VOL */ | |
104 | #ifdef DEBUG_CMD_VOL | |
105 | #define DEBUG_VOL(x...) printk(KERN_INFO x) | |
106 | #else | |
107 | #define DEBUG_VOL(x...) | |
108 | #endif | |
109 | ||
110 | /* #define DEBUG_CMD_STOP */ | |
111 | #ifdef DEBUG_CMD_STOP | |
112 | #define DEBUG_CS(x...) printk(KERN_INFO x) | |
113 | #else | |
114 | #define DEBUG_CS(x...) | |
115 | #endif | |
116 | ||
117 | /* #define DEBUG_PASSTHROUGH */ | |
118 | #ifdef DEBUG_PASSTHROUGH | |
119 | #define DEBUG_PT(x...) printk(KERN_INFO x) | |
120 | #else | |
121 | #define DEBUG_PT(x...) | |
122 | #endif | |
123 | ||
124 | /* #define DEBUG_TASK_STOP */ | |
125 | #ifdef DEBUG_TASK_STOP | |
126 | #define DEBUG_TS(x...) printk(KERN_INFO x) | |
127 | #else | |
128 | #define DEBUG_TS(x...) | |
129 | #endif | |
130 | ||
131 | /* #define DEBUG_TRANSPORT_STOP */ | |
132 | #ifdef DEBUG_TRANSPORT_STOP | |
133 | #define DEBUG_TRANSPORT_S(x...) printk(KERN_INFO x) | |
134 | #else | |
135 | #define DEBUG_TRANSPORT_S(x...) | |
136 | #endif | |
137 | ||
138 | /* #define DEBUG_TASK_FAILURE */ | |
139 | #ifdef DEBUG_TASK_FAILURE | |
140 | #define DEBUG_TF(x...) printk(KERN_INFO x) | |
141 | #else | |
142 | #define DEBUG_TF(x...) | |
143 | #endif | |
144 | ||
145 | /* #define DEBUG_DEV_OFFLINE */ | |
146 | #ifdef DEBUG_DEV_OFFLINE | |
147 | #define DEBUG_DO(x...) printk(KERN_INFO x) | |
148 | #else | |
149 | #define DEBUG_DO(x...) | |
150 | #endif | |
151 | ||
152 | /* #define DEBUG_TASK_STATE */ | |
153 | #ifdef DEBUG_TASK_STATE | |
154 | #define DEBUG_TSTATE(x...) printk(KERN_INFO x) | |
155 | #else | |
156 | #define DEBUG_TSTATE(x...) | |
157 | #endif | |
158 | ||
159 | /* #define DEBUG_STATUS_THR */ | |
160 | #ifdef DEBUG_STATUS_THR | |
161 | #define DEBUG_ST(x...) printk(KERN_INFO x) | |
162 | #else | |
163 | #define DEBUG_ST(x...) | |
164 | #endif | |
165 | ||
166 | /* #define DEBUG_TASK_TIMEOUT */ | |
167 | #ifdef DEBUG_TASK_TIMEOUT | |
168 | #define DEBUG_TT(x...) printk(KERN_INFO x) | |
169 | #else | |
170 | #define DEBUG_TT(x...) | |
171 | #endif | |
172 | ||
173 | /* #define DEBUG_GENERIC_REQUEST_FAILURE */ | |
174 | #ifdef DEBUG_GENERIC_REQUEST_FAILURE | |
175 | #define DEBUG_GRF(x...) printk(KERN_INFO x) | |
176 | #else | |
177 | #define DEBUG_GRF(x...) | |
178 | #endif | |
179 | ||
180 | /* #define DEBUG_SAM_TASK_ATTRS */ | |
181 | #ifdef DEBUG_SAM_TASK_ATTRS | |
182 | #define DEBUG_STA(x...) printk(KERN_INFO x) | |
183 | #else | |
184 | #define DEBUG_STA(x...) | |
185 | #endif | |
186 | ||
e3d6f909 | 187 | static int sub_api_initialized; |
c66ac9db NB |
188 | |
189 | static struct kmem_cache *se_cmd_cache; | |
190 | static struct kmem_cache *se_sess_cache; | |
191 | struct kmem_cache *se_tmr_req_cache; | |
192 | struct kmem_cache *se_ua_cache; | |
c66ac9db NB |
193 | struct kmem_cache *t10_pr_reg_cache; |
194 | struct kmem_cache *t10_alua_lu_gp_cache; | |
195 | struct kmem_cache *t10_alua_lu_gp_mem_cache; | |
196 | struct kmem_cache *t10_alua_tg_pt_gp_cache; | |
197 | struct kmem_cache *t10_alua_tg_pt_gp_mem_cache; | |
198 | ||
199 | /* Used for transport_dev_get_map_*() */ | |
200 | typedef int (*map_func_t)(struct se_task *, u32); | |
201 | ||
202 | static int transport_generic_write_pending(struct se_cmd *); | |
5951146d | 203 | static int transport_processing_thread(void *param); |
c66ac9db NB |
204 | static int __transport_execute_tasks(struct se_device *dev); |
205 | static void transport_complete_task_attr(struct se_cmd *cmd); | |
07bde79a NB |
206 | static int transport_complete_qf(struct se_cmd *cmd); |
207 | static void transport_handle_queue_full(struct se_cmd *cmd, | |
208 | struct se_device *dev, int (*qf_callback)(struct se_cmd *)); | |
c66ac9db NB |
209 | static void transport_direct_request_timeout(struct se_cmd *cmd); |
210 | static void transport_free_dev_tasks(struct se_cmd *cmd); | |
a1d8b49a | 211 | static u32 transport_allocate_tasks(struct se_cmd *cmd, |
ec98f782 | 212 | unsigned long long starting_lba, |
c66ac9db | 213 | enum dma_data_direction data_direction, |
ec98f782 | 214 | struct scatterlist *sgl, unsigned int nents); |
05d1c7c0 | 215 | static int transport_generic_get_mem(struct se_cmd *cmd); |
c66ac9db | 216 | static int transport_generic_remove(struct se_cmd *cmd, |
35462975 | 217 | int session_reinstatement); |
c66ac9db NB |
218 | static void transport_release_fe_cmd(struct se_cmd *cmd); |
219 | static void transport_remove_cmd_from_queue(struct se_cmd *cmd, | |
220 | struct se_queue_obj *qobj); | |
221 | static int transport_set_sense_codes(struct se_cmd *cmd, u8 asc, u8 ascq); | |
222 | static void transport_stop_all_task_timers(struct se_cmd *cmd); | |
223 | ||
e3d6f909 | 224 | int init_se_kmem_caches(void) |
c66ac9db | 225 | { |
c66ac9db NB |
226 | se_cmd_cache = kmem_cache_create("se_cmd_cache", |
227 | sizeof(struct se_cmd), __alignof__(struct se_cmd), 0, NULL); | |
228 | if (!(se_cmd_cache)) { | |
229 | printk(KERN_ERR "kmem_cache_create for struct se_cmd failed\n"); | |
230 | goto out; | |
231 | } | |
232 | se_tmr_req_cache = kmem_cache_create("se_tmr_cache", | |
233 | sizeof(struct se_tmr_req), __alignof__(struct se_tmr_req), | |
234 | 0, NULL); | |
235 | if (!(se_tmr_req_cache)) { | |
236 | printk(KERN_ERR "kmem_cache_create() for struct se_tmr_req" | |
237 | " failed\n"); | |
238 | goto out; | |
239 | } | |
240 | se_sess_cache = kmem_cache_create("se_sess_cache", | |
241 | sizeof(struct se_session), __alignof__(struct se_session), | |
242 | 0, NULL); | |
243 | if (!(se_sess_cache)) { | |
244 | printk(KERN_ERR "kmem_cache_create() for struct se_session" | |
245 | " failed\n"); | |
246 | goto out; | |
247 | } | |
248 | se_ua_cache = kmem_cache_create("se_ua_cache", | |
249 | sizeof(struct se_ua), __alignof__(struct se_ua), | |
250 | 0, NULL); | |
251 | if (!(se_ua_cache)) { | |
252 | printk(KERN_ERR "kmem_cache_create() for struct se_ua failed\n"); | |
253 | goto out; | |
254 | } | |
c66ac9db NB |
255 | t10_pr_reg_cache = kmem_cache_create("t10_pr_reg_cache", |
256 | sizeof(struct t10_pr_registration), | |
257 | __alignof__(struct t10_pr_registration), 0, NULL); | |
258 | if (!(t10_pr_reg_cache)) { | |
259 | printk(KERN_ERR "kmem_cache_create() for struct t10_pr_registration" | |
260 | " failed\n"); | |
261 | goto out; | |
262 | } | |
263 | t10_alua_lu_gp_cache = kmem_cache_create("t10_alua_lu_gp_cache", | |
264 | sizeof(struct t10_alua_lu_gp), __alignof__(struct t10_alua_lu_gp), | |
265 | 0, NULL); | |
266 | if (!(t10_alua_lu_gp_cache)) { | |
267 | printk(KERN_ERR "kmem_cache_create() for t10_alua_lu_gp_cache" | |
268 | " failed\n"); | |
269 | goto out; | |
270 | } | |
271 | t10_alua_lu_gp_mem_cache = kmem_cache_create("t10_alua_lu_gp_mem_cache", | |
272 | sizeof(struct t10_alua_lu_gp_member), | |
273 | __alignof__(struct t10_alua_lu_gp_member), 0, NULL); | |
274 | if (!(t10_alua_lu_gp_mem_cache)) { | |
275 | printk(KERN_ERR "kmem_cache_create() for t10_alua_lu_gp_mem_" | |
276 | "cache failed\n"); | |
277 | goto out; | |
278 | } | |
279 | t10_alua_tg_pt_gp_cache = kmem_cache_create("t10_alua_tg_pt_gp_cache", | |
280 | sizeof(struct t10_alua_tg_pt_gp), | |
281 | __alignof__(struct t10_alua_tg_pt_gp), 0, NULL); | |
282 | if (!(t10_alua_tg_pt_gp_cache)) { | |
283 | printk(KERN_ERR "kmem_cache_create() for t10_alua_tg_pt_gp_" | |
284 | "cache failed\n"); | |
285 | goto out; | |
286 | } | |
287 | t10_alua_tg_pt_gp_mem_cache = kmem_cache_create( | |
288 | "t10_alua_tg_pt_gp_mem_cache", | |
289 | sizeof(struct t10_alua_tg_pt_gp_member), | |
290 | __alignof__(struct t10_alua_tg_pt_gp_member), | |
291 | 0, NULL); | |
292 | if (!(t10_alua_tg_pt_gp_mem_cache)) { | |
293 | printk(KERN_ERR "kmem_cache_create() for t10_alua_tg_pt_gp_" | |
294 | "mem_t failed\n"); | |
295 | goto out; | |
296 | } | |
297 | ||
c66ac9db NB |
298 | return 0; |
299 | out: | |
300 | if (se_cmd_cache) | |
301 | kmem_cache_destroy(se_cmd_cache); | |
302 | if (se_tmr_req_cache) | |
303 | kmem_cache_destroy(se_tmr_req_cache); | |
304 | if (se_sess_cache) | |
305 | kmem_cache_destroy(se_sess_cache); | |
306 | if (se_ua_cache) | |
307 | kmem_cache_destroy(se_ua_cache); | |
c66ac9db NB |
308 | if (t10_pr_reg_cache) |
309 | kmem_cache_destroy(t10_pr_reg_cache); | |
310 | if (t10_alua_lu_gp_cache) | |
311 | kmem_cache_destroy(t10_alua_lu_gp_cache); | |
312 | if (t10_alua_lu_gp_mem_cache) | |
313 | kmem_cache_destroy(t10_alua_lu_gp_mem_cache); | |
314 | if (t10_alua_tg_pt_gp_cache) | |
315 | kmem_cache_destroy(t10_alua_tg_pt_gp_cache); | |
316 | if (t10_alua_tg_pt_gp_mem_cache) | |
317 | kmem_cache_destroy(t10_alua_tg_pt_gp_mem_cache); | |
e3d6f909 | 318 | return -ENOMEM; |
c66ac9db NB |
319 | } |
320 | ||
e3d6f909 | 321 | void release_se_kmem_caches(void) |
c66ac9db | 322 | { |
c66ac9db NB |
323 | kmem_cache_destroy(se_cmd_cache); |
324 | kmem_cache_destroy(se_tmr_req_cache); | |
325 | kmem_cache_destroy(se_sess_cache); | |
326 | kmem_cache_destroy(se_ua_cache); | |
c66ac9db NB |
327 | kmem_cache_destroy(t10_pr_reg_cache); |
328 | kmem_cache_destroy(t10_alua_lu_gp_cache); | |
329 | kmem_cache_destroy(t10_alua_lu_gp_mem_cache); | |
330 | kmem_cache_destroy(t10_alua_tg_pt_gp_cache); | |
331 | kmem_cache_destroy(t10_alua_tg_pt_gp_mem_cache); | |
c66ac9db NB |
332 | } |
333 | ||
e3d6f909 AG |
334 | /* This code ensures unique mib indexes are handed out. */ |
335 | static DEFINE_SPINLOCK(scsi_mib_index_lock); | |
336 | static u32 scsi_mib_index[SCSI_INDEX_TYPE_MAX]; | |
e89d15ee NB |
337 | |
338 | /* | |
339 | * Allocate a new row index for the entry type specified | |
340 | */ | |
341 | u32 scsi_get_new_index(scsi_index_t type) | |
342 | { | |
343 | u32 new_index; | |
344 | ||
e3d6f909 | 345 | BUG_ON((type < 0) || (type >= SCSI_INDEX_TYPE_MAX)); |
e89d15ee | 346 | |
e3d6f909 AG |
347 | spin_lock(&scsi_mib_index_lock); |
348 | new_index = ++scsi_mib_index[type]; | |
349 | spin_unlock(&scsi_mib_index_lock); | |
e89d15ee NB |
350 | |
351 | return new_index; | |
352 | } | |
353 | ||
c66ac9db NB |
354 | void transport_init_queue_obj(struct se_queue_obj *qobj) |
355 | { | |
356 | atomic_set(&qobj->queue_cnt, 0); | |
357 | INIT_LIST_HEAD(&qobj->qobj_list); | |
358 | init_waitqueue_head(&qobj->thread_wq); | |
359 | spin_lock_init(&qobj->cmd_queue_lock); | |
360 | } | |
361 | EXPORT_SYMBOL(transport_init_queue_obj); | |
362 | ||
363 | static int transport_subsystem_reqmods(void) | |
364 | { | |
365 | int ret; | |
366 | ||
367 | ret = request_module("target_core_iblock"); | |
368 | if (ret != 0) | |
369 | printk(KERN_ERR "Unable to load target_core_iblock\n"); | |
370 | ||
371 | ret = request_module("target_core_file"); | |
372 | if (ret != 0) | |
373 | printk(KERN_ERR "Unable to load target_core_file\n"); | |
374 | ||
375 | ret = request_module("target_core_pscsi"); | |
376 | if (ret != 0) | |
377 | printk(KERN_ERR "Unable to load target_core_pscsi\n"); | |
378 | ||
379 | ret = request_module("target_core_stgt"); | |
380 | if (ret != 0) | |
381 | printk(KERN_ERR "Unable to load target_core_stgt\n"); | |
382 | ||
383 | return 0; | |
384 | } | |
385 | ||
386 | int transport_subsystem_check_init(void) | |
387 | { | |
e3d6f909 AG |
388 | int ret; |
389 | ||
390 | if (sub_api_initialized) | |
c66ac9db NB |
391 | return 0; |
392 | /* | |
393 | * Request the loading of known TCM subsystem plugins.. | |
394 | */ | |
e3d6f909 AG |
395 | ret = transport_subsystem_reqmods(); |
396 | if (ret < 0) | |
397 | return ret; | |
c66ac9db | 398 | |
e3d6f909 | 399 | sub_api_initialized = 1; |
c66ac9db NB |
400 | return 0; |
401 | } | |
402 | ||
403 | struct se_session *transport_init_session(void) | |
404 | { | |
405 | struct se_session *se_sess; | |
406 | ||
407 | se_sess = kmem_cache_zalloc(se_sess_cache, GFP_KERNEL); | |
408 | if (!(se_sess)) { | |
409 | printk(KERN_ERR "Unable to allocate struct se_session from" | |
410 | " se_sess_cache\n"); | |
411 | return ERR_PTR(-ENOMEM); | |
412 | } | |
413 | INIT_LIST_HEAD(&se_sess->sess_list); | |
414 | INIT_LIST_HEAD(&se_sess->sess_acl_list); | |
c66ac9db NB |
415 | |
416 | return se_sess; | |
417 | } | |
418 | EXPORT_SYMBOL(transport_init_session); | |
419 | ||
420 | /* | |
421 | * Called with spin_lock_bh(&struct se_portal_group->session_lock called. | |
422 | */ | |
423 | void __transport_register_session( | |
424 | struct se_portal_group *se_tpg, | |
425 | struct se_node_acl *se_nacl, | |
426 | struct se_session *se_sess, | |
427 | void *fabric_sess_ptr) | |
428 | { | |
429 | unsigned char buf[PR_REG_ISID_LEN]; | |
430 | ||
431 | se_sess->se_tpg = se_tpg; | |
432 | se_sess->fabric_sess_ptr = fabric_sess_ptr; | |
433 | /* | |
434 | * Used by struct se_node_acl's under ConfigFS to locate active se_session-t | |
435 | * | |
436 | * Only set for struct se_session's that will actually be moving I/O. | |
437 | * eg: *NOT* discovery sessions. | |
438 | */ | |
439 | if (se_nacl) { | |
440 | /* | |
441 | * If the fabric module supports an ISID based TransportID, | |
442 | * save this value in binary from the fabric I_T Nexus now. | |
443 | */ | |
e3d6f909 | 444 | if (se_tpg->se_tpg_tfo->sess_get_initiator_sid != NULL) { |
c66ac9db | 445 | memset(&buf[0], 0, PR_REG_ISID_LEN); |
e3d6f909 | 446 | se_tpg->se_tpg_tfo->sess_get_initiator_sid(se_sess, |
c66ac9db NB |
447 | &buf[0], PR_REG_ISID_LEN); |
448 | se_sess->sess_bin_isid = get_unaligned_be64(&buf[0]); | |
449 | } | |
450 | spin_lock_irq(&se_nacl->nacl_sess_lock); | |
451 | /* | |
452 | * The se_nacl->nacl_sess pointer will be set to the | |
453 | * last active I_T Nexus for each struct se_node_acl. | |
454 | */ | |
455 | se_nacl->nacl_sess = se_sess; | |
456 | ||
457 | list_add_tail(&se_sess->sess_acl_list, | |
458 | &se_nacl->acl_sess_list); | |
459 | spin_unlock_irq(&se_nacl->nacl_sess_lock); | |
460 | } | |
461 | list_add_tail(&se_sess->sess_list, &se_tpg->tpg_sess_list); | |
462 | ||
463 | printk(KERN_INFO "TARGET_CORE[%s]: Registered fabric_sess_ptr: %p\n", | |
e3d6f909 | 464 | se_tpg->se_tpg_tfo->get_fabric_name(), se_sess->fabric_sess_ptr); |
c66ac9db NB |
465 | } |
466 | EXPORT_SYMBOL(__transport_register_session); | |
467 | ||
468 | void transport_register_session( | |
469 | struct se_portal_group *se_tpg, | |
470 | struct se_node_acl *se_nacl, | |
471 | struct se_session *se_sess, | |
472 | void *fabric_sess_ptr) | |
473 | { | |
474 | spin_lock_bh(&se_tpg->session_lock); | |
475 | __transport_register_session(se_tpg, se_nacl, se_sess, fabric_sess_ptr); | |
476 | spin_unlock_bh(&se_tpg->session_lock); | |
477 | } | |
478 | EXPORT_SYMBOL(transport_register_session); | |
479 | ||
480 | void transport_deregister_session_configfs(struct se_session *se_sess) | |
481 | { | |
482 | struct se_node_acl *se_nacl; | |
23388864 | 483 | unsigned long flags; |
c66ac9db NB |
484 | /* |
485 | * Used by struct se_node_acl's under ConfigFS to locate active struct se_session | |
486 | */ | |
487 | se_nacl = se_sess->se_node_acl; | |
488 | if ((se_nacl)) { | |
23388864 | 489 | spin_lock_irqsave(&se_nacl->nacl_sess_lock, flags); |
c66ac9db NB |
490 | list_del(&se_sess->sess_acl_list); |
491 | /* | |
492 | * If the session list is empty, then clear the pointer. | |
493 | * Otherwise, set the struct se_session pointer from the tail | |
494 | * element of the per struct se_node_acl active session list. | |
495 | */ | |
496 | if (list_empty(&se_nacl->acl_sess_list)) | |
497 | se_nacl->nacl_sess = NULL; | |
498 | else { | |
499 | se_nacl->nacl_sess = container_of( | |
500 | se_nacl->acl_sess_list.prev, | |
501 | struct se_session, sess_acl_list); | |
502 | } | |
23388864 | 503 | spin_unlock_irqrestore(&se_nacl->nacl_sess_lock, flags); |
c66ac9db NB |
504 | } |
505 | } | |
506 | EXPORT_SYMBOL(transport_deregister_session_configfs); | |
507 | ||
508 | void transport_free_session(struct se_session *se_sess) | |
509 | { | |
510 | kmem_cache_free(se_sess_cache, se_sess); | |
511 | } | |
512 | EXPORT_SYMBOL(transport_free_session); | |
513 | ||
514 | void transport_deregister_session(struct se_session *se_sess) | |
515 | { | |
516 | struct se_portal_group *se_tpg = se_sess->se_tpg; | |
517 | struct se_node_acl *se_nacl; | |
518 | ||
519 | if (!(se_tpg)) { | |
520 | transport_free_session(se_sess); | |
521 | return; | |
522 | } | |
c66ac9db NB |
523 | |
524 | spin_lock_bh(&se_tpg->session_lock); | |
525 | list_del(&se_sess->sess_list); | |
526 | se_sess->se_tpg = NULL; | |
527 | se_sess->fabric_sess_ptr = NULL; | |
528 | spin_unlock_bh(&se_tpg->session_lock); | |
529 | ||
530 | /* | |
531 | * Determine if we need to do extra work for this initiator node's | |
532 | * struct se_node_acl if it had been previously dynamically generated. | |
533 | */ | |
534 | se_nacl = se_sess->se_node_acl; | |
535 | if ((se_nacl)) { | |
536 | spin_lock_bh(&se_tpg->acl_node_lock); | |
537 | if (se_nacl->dynamic_node_acl) { | |
e3d6f909 | 538 | if (!(se_tpg->se_tpg_tfo->tpg_check_demo_mode_cache( |
c66ac9db NB |
539 | se_tpg))) { |
540 | list_del(&se_nacl->acl_list); | |
541 | se_tpg->num_node_acls--; | |
542 | spin_unlock_bh(&se_tpg->acl_node_lock); | |
543 | ||
544 | core_tpg_wait_for_nacl_pr_ref(se_nacl); | |
c66ac9db | 545 | core_free_device_list_for_node(se_nacl, se_tpg); |
e3d6f909 | 546 | se_tpg->se_tpg_tfo->tpg_release_fabric_acl(se_tpg, |
c66ac9db NB |
547 | se_nacl); |
548 | spin_lock_bh(&se_tpg->acl_node_lock); | |
549 | } | |
550 | } | |
551 | spin_unlock_bh(&se_tpg->acl_node_lock); | |
552 | } | |
553 | ||
554 | transport_free_session(se_sess); | |
555 | ||
556 | printk(KERN_INFO "TARGET_CORE[%s]: Deregistered fabric_sess\n", | |
e3d6f909 | 557 | se_tpg->se_tpg_tfo->get_fabric_name()); |
c66ac9db NB |
558 | } |
559 | EXPORT_SYMBOL(transport_deregister_session); | |
560 | ||
561 | /* | |
a1d8b49a | 562 | * Called with cmd->t_state_lock held. |
c66ac9db NB |
563 | */ |
564 | static void transport_all_task_dev_remove_state(struct se_cmd *cmd) | |
565 | { | |
566 | struct se_device *dev; | |
567 | struct se_task *task; | |
568 | unsigned long flags; | |
569 | ||
a1d8b49a | 570 | list_for_each_entry(task, &cmd->t_task_list, t_list) { |
c66ac9db NB |
571 | dev = task->se_dev; |
572 | if (!(dev)) | |
573 | continue; | |
574 | ||
575 | if (atomic_read(&task->task_active)) | |
576 | continue; | |
577 | ||
578 | if (!(atomic_read(&task->task_state_active))) | |
579 | continue; | |
580 | ||
581 | spin_lock_irqsave(&dev->execute_task_lock, flags); | |
582 | list_del(&task->t_state_list); | |
583 | DEBUG_TSTATE("Removed ITT: 0x%08x dev: %p task[%p]\n", | |
e3d6f909 | 584 | cmd->se_tfo->tfo_get_task_tag(cmd), dev, task); |
c66ac9db NB |
585 | spin_unlock_irqrestore(&dev->execute_task_lock, flags); |
586 | ||
587 | atomic_set(&task->task_state_active, 0); | |
a1d8b49a | 588 | atomic_dec(&cmd->t_task_cdbs_ex_left); |
c66ac9db NB |
589 | } |
590 | } | |
591 | ||
592 | /* transport_cmd_check_stop(): | |
593 | * | |
594 | * 'transport_off = 1' determines if t_transport_active should be cleared. | |
595 | * 'transport_off = 2' determines if task_dev_state should be removed. | |
596 | * | |
597 | * A non-zero u8 t_state sets cmd->t_state. | |
598 | * Returns 1 when command is stopped, else 0. | |
599 | */ | |
600 | static int transport_cmd_check_stop( | |
601 | struct se_cmd *cmd, | |
602 | int transport_off, | |
603 | u8 t_state) | |
604 | { | |
605 | unsigned long flags; | |
606 | ||
a1d8b49a | 607 | spin_lock_irqsave(&cmd->t_state_lock, flags); |
c66ac9db NB |
608 | /* |
609 | * Determine if IOCTL context caller in requesting the stopping of this | |
610 | * command for LUN shutdown purposes. | |
611 | */ | |
a1d8b49a AG |
612 | if (atomic_read(&cmd->transport_lun_stop)) { |
613 | DEBUG_CS("%s:%d atomic_read(&cmd->transport_lun_stop)" | |
c66ac9db | 614 | " == TRUE for ITT: 0x%08x\n", __func__, __LINE__, |
e3d6f909 | 615 | cmd->se_tfo->get_task_tag(cmd)); |
c66ac9db NB |
616 | |
617 | cmd->deferred_t_state = cmd->t_state; | |
618 | cmd->t_state = TRANSPORT_DEFERRED_CMD; | |
a1d8b49a | 619 | atomic_set(&cmd->t_transport_active, 0); |
c66ac9db NB |
620 | if (transport_off == 2) |
621 | transport_all_task_dev_remove_state(cmd); | |
a1d8b49a | 622 | spin_unlock_irqrestore(&cmd->t_state_lock, flags); |
c66ac9db | 623 | |
a1d8b49a | 624 | complete(&cmd->transport_lun_stop_comp); |
c66ac9db NB |
625 | return 1; |
626 | } | |
627 | /* | |
628 | * Determine if frontend context caller is requesting the stopping of | |
e3d6f909 | 629 | * this command for frontend exceptions. |
c66ac9db | 630 | */ |
a1d8b49a AG |
631 | if (atomic_read(&cmd->t_transport_stop)) { |
632 | DEBUG_CS("%s:%d atomic_read(&cmd->t_transport_stop) ==" | |
c66ac9db | 633 | " TRUE for ITT: 0x%08x\n", __func__, __LINE__, |
e3d6f909 | 634 | cmd->se_tfo->get_task_tag(cmd)); |
c66ac9db NB |
635 | |
636 | cmd->deferred_t_state = cmd->t_state; | |
637 | cmd->t_state = TRANSPORT_DEFERRED_CMD; | |
638 | if (transport_off == 2) | |
639 | transport_all_task_dev_remove_state(cmd); | |
640 | ||
641 | /* | |
642 | * Clear struct se_cmd->se_lun before the transport_off == 2 handoff | |
643 | * to FE. | |
644 | */ | |
645 | if (transport_off == 2) | |
646 | cmd->se_lun = NULL; | |
a1d8b49a | 647 | spin_unlock_irqrestore(&cmd->t_state_lock, flags); |
c66ac9db | 648 | |
a1d8b49a | 649 | complete(&cmd->t_transport_stop_comp); |
c66ac9db NB |
650 | return 1; |
651 | } | |
652 | if (transport_off) { | |
a1d8b49a | 653 | atomic_set(&cmd->t_transport_active, 0); |
c66ac9db NB |
654 | if (transport_off == 2) { |
655 | transport_all_task_dev_remove_state(cmd); | |
656 | /* | |
657 | * Clear struct se_cmd->se_lun before the transport_off == 2 | |
658 | * handoff to fabric module. | |
659 | */ | |
660 | cmd->se_lun = NULL; | |
661 | /* | |
662 | * Some fabric modules like tcm_loop can release | |
25985edc | 663 | * their internally allocated I/O reference now and |
c66ac9db NB |
664 | * struct se_cmd now. |
665 | */ | |
e3d6f909 | 666 | if (cmd->se_tfo->check_stop_free != NULL) { |
c66ac9db | 667 | spin_unlock_irqrestore( |
a1d8b49a | 668 | &cmd->t_state_lock, flags); |
c66ac9db | 669 | |
e3d6f909 | 670 | cmd->se_tfo->check_stop_free(cmd); |
c66ac9db NB |
671 | return 1; |
672 | } | |
673 | } | |
a1d8b49a | 674 | spin_unlock_irqrestore(&cmd->t_state_lock, flags); |
c66ac9db NB |
675 | |
676 | return 0; | |
677 | } else if (t_state) | |
678 | cmd->t_state = t_state; | |
a1d8b49a | 679 | spin_unlock_irqrestore(&cmd->t_state_lock, flags); |
c66ac9db NB |
680 | |
681 | return 0; | |
682 | } | |
683 | ||
684 | static int transport_cmd_check_stop_to_fabric(struct se_cmd *cmd) | |
685 | { | |
686 | return transport_cmd_check_stop(cmd, 2, 0); | |
687 | } | |
688 | ||
689 | static void transport_lun_remove_cmd(struct se_cmd *cmd) | |
690 | { | |
e3d6f909 | 691 | struct se_lun *lun = cmd->se_lun; |
c66ac9db NB |
692 | unsigned long flags; |
693 | ||
694 | if (!lun) | |
695 | return; | |
696 | ||
a1d8b49a AG |
697 | spin_lock_irqsave(&cmd->t_state_lock, flags); |
698 | if (!(atomic_read(&cmd->transport_dev_active))) { | |
699 | spin_unlock_irqrestore(&cmd->t_state_lock, flags); | |
c66ac9db NB |
700 | goto check_lun; |
701 | } | |
a1d8b49a | 702 | atomic_set(&cmd->transport_dev_active, 0); |
c66ac9db | 703 | transport_all_task_dev_remove_state(cmd); |
a1d8b49a | 704 | spin_unlock_irqrestore(&cmd->t_state_lock, flags); |
c66ac9db | 705 | |
c66ac9db NB |
706 | |
707 | check_lun: | |
708 | spin_lock_irqsave(&lun->lun_cmd_lock, flags); | |
a1d8b49a | 709 | if (atomic_read(&cmd->transport_lun_active)) { |
5951146d | 710 | list_del(&cmd->se_lun_node); |
a1d8b49a | 711 | atomic_set(&cmd->transport_lun_active, 0); |
c66ac9db NB |
712 | #if 0 |
713 | printk(KERN_INFO "Removed ITT: 0x%08x from LUN LIST[%d]\n" | |
e3d6f909 | 714 | cmd->se_tfo->get_task_tag(cmd), lun->unpacked_lun); |
c66ac9db NB |
715 | #endif |
716 | } | |
717 | spin_unlock_irqrestore(&lun->lun_cmd_lock, flags); | |
718 | } | |
719 | ||
720 | void transport_cmd_finish_abort(struct se_cmd *cmd, int remove) | |
721 | { | |
5951146d | 722 | transport_remove_cmd_from_queue(cmd, &cmd->se_dev->dev_queue_obj); |
c66ac9db NB |
723 | transport_lun_remove_cmd(cmd); |
724 | ||
725 | if (transport_cmd_check_stop_to_fabric(cmd)) | |
726 | return; | |
727 | if (remove) | |
35462975 | 728 | transport_generic_remove(cmd, 0); |
c66ac9db NB |
729 | } |
730 | ||
731 | void transport_cmd_finish_abort_tmr(struct se_cmd *cmd) | |
732 | { | |
5951146d | 733 | transport_remove_cmd_from_queue(cmd, &cmd->se_dev->dev_queue_obj); |
c66ac9db NB |
734 | |
735 | if (transport_cmd_check_stop_to_fabric(cmd)) | |
736 | return; | |
737 | ||
35462975 | 738 | transport_generic_remove(cmd, 0); |
c66ac9db NB |
739 | } |
740 | ||
5951146d | 741 | static void transport_add_cmd_to_queue( |
c66ac9db NB |
742 | struct se_cmd *cmd, |
743 | int t_state) | |
744 | { | |
745 | struct se_device *dev = cmd->se_dev; | |
e3d6f909 | 746 | struct se_queue_obj *qobj = &dev->dev_queue_obj; |
c66ac9db NB |
747 | unsigned long flags; |
748 | ||
5951146d | 749 | INIT_LIST_HEAD(&cmd->se_queue_node); |
c66ac9db NB |
750 | |
751 | if (t_state) { | |
a1d8b49a | 752 | spin_lock_irqsave(&cmd->t_state_lock, flags); |
c66ac9db | 753 | cmd->t_state = t_state; |
a1d8b49a AG |
754 | atomic_set(&cmd->t_transport_active, 1); |
755 | spin_unlock_irqrestore(&cmd->t_state_lock, flags); | |
c66ac9db NB |
756 | } |
757 | ||
758 | spin_lock_irqsave(&qobj->cmd_queue_lock, flags); | |
07bde79a NB |
759 | if (cmd->se_cmd_flags & SCF_EMULATE_QUEUE_FULL) { |
760 | cmd->se_cmd_flags &= ~SCF_EMULATE_QUEUE_FULL; | |
761 | list_add(&cmd->se_queue_node, &qobj->qobj_list); | |
762 | } else | |
763 | list_add_tail(&cmd->se_queue_node, &qobj->qobj_list); | |
a1d8b49a | 764 | atomic_inc(&cmd->t_transport_queue_active); |
c66ac9db NB |
765 | spin_unlock_irqrestore(&qobj->cmd_queue_lock, flags); |
766 | ||
767 | atomic_inc(&qobj->queue_cnt); | |
768 | wake_up_interruptible(&qobj->thread_wq); | |
c66ac9db NB |
769 | } |
770 | ||
5951146d AG |
771 | static struct se_cmd * |
772 | transport_get_cmd_from_queue(struct se_queue_obj *qobj) | |
c66ac9db | 773 | { |
5951146d | 774 | struct se_cmd *cmd; |
c66ac9db NB |
775 | unsigned long flags; |
776 | ||
777 | spin_lock_irqsave(&qobj->cmd_queue_lock, flags); | |
778 | if (list_empty(&qobj->qobj_list)) { | |
779 | spin_unlock_irqrestore(&qobj->cmd_queue_lock, flags); | |
780 | return NULL; | |
781 | } | |
5951146d | 782 | cmd = list_first_entry(&qobj->qobj_list, struct se_cmd, se_queue_node); |
c66ac9db | 783 | |
a1d8b49a | 784 | atomic_dec(&cmd->t_transport_queue_active); |
c66ac9db | 785 | |
5951146d | 786 | list_del(&cmd->se_queue_node); |
c66ac9db NB |
787 | atomic_dec(&qobj->queue_cnt); |
788 | spin_unlock_irqrestore(&qobj->cmd_queue_lock, flags); | |
789 | ||
5951146d | 790 | return cmd; |
c66ac9db NB |
791 | } |
792 | ||
793 | static void transport_remove_cmd_from_queue(struct se_cmd *cmd, | |
794 | struct se_queue_obj *qobj) | |
795 | { | |
5951146d | 796 | struct se_cmd *t; |
c66ac9db NB |
797 | unsigned long flags; |
798 | ||
799 | spin_lock_irqsave(&qobj->cmd_queue_lock, flags); | |
a1d8b49a | 800 | if (!(atomic_read(&cmd->t_transport_queue_active))) { |
c66ac9db NB |
801 | spin_unlock_irqrestore(&qobj->cmd_queue_lock, flags); |
802 | return; | |
803 | } | |
804 | ||
5951146d AG |
805 | list_for_each_entry(t, &qobj->qobj_list, se_queue_node) |
806 | if (t == cmd) { | |
a1d8b49a | 807 | atomic_dec(&cmd->t_transport_queue_active); |
5951146d AG |
808 | atomic_dec(&qobj->queue_cnt); |
809 | list_del(&cmd->se_queue_node); | |
810 | break; | |
811 | } | |
c66ac9db NB |
812 | spin_unlock_irqrestore(&qobj->cmd_queue_lock, flags); |
813 | ||
a1d8b49a | 814 | if (atomic_read(&cmd->t_transport_queue_active)) { |
c66ac9db | 815 | printk(KERN_ERR "ITT: 0x%08x t_transport_queue_active: %d\n", |
e3d6f909 | 816 | cmd->se_tfo->get_task_tag(cmd), |
a1d8b49a | 817 | atomic_read(&cmd->t_transport_queue_active)); |
c66ac9db NB |
818 | } |
819 | } | |
820 | ||
821 | /* | |
822 | * Completion function used by TCM subsystem plugins (such as FILEIO) | |
823 | * for queueing up response from struct se_subsystem_api->do_task() | |
824 | */ | |
825 | void transport_complete_sync_cache(struct se_cmd *cmd, int good) | |
826 | { | |
a1d8b49a | 827 | struct se_task *task = list_entry(cmd->t_task_list.next, |
c66ac9db NB |
828 | struct se_task, t_list); |
829 | ||
830 | if (good) { | |
831 | cmd->scsi_status = SAM_STAT_GOOD; | |
832 | task->task_scsi_status = GOOD; | |
833 | } else { | |
834 | task->task_scsi_status = SAM_STAT_CHECK_CONDITION; | |
835 | task->task_error_status = PYX_TRANSPORT_ILLEGAL_REQUEST; | |
e3d6f909 | 836 | task->task_se_cmd->transport_error_status = |
c66ac9db NB |
837 | PYX_TRANSPORT_ILLEGAL_REQUEST; |
838 | } | |
839 | ||
840 | transport_complete_task(task, good); | |
841 | } | |
842 | EXPORT_SYMBOL(transport_complete_sync_cache); | |
843 | ||
844 | /* transport_complete_task(): | |
845 | * | |
846 | * Called from interrupt and non interrupt context depending | |
847 | * on the transport plugin. | |
848 | */ | |
849 | void transport_complete_task(struct se_task *task, int success) | |
850 | { | |
e3d6f909 | 851 | struct se_cmd *cmd = task->task_se_cmd; |
c66ac9db NB |
852 | struct se_device *dev = task->se_dev; |
853 | int t_state; | |
854 | unsigned long flags; | |
855 | #if 0 | |
856 | printk(KERN_INFO "task: %p CDB: 0x%02x obj_ptr: %p\n", task, | |
a1d8b49a | 857 | cmd->t_task_cdb[0], dev); |
c66ac9db | 858 | #endif |
e3d6f909 | 859 | if (dev) |
c66ac9db | 860 | atomic_inc(&dev->depth_left); |
c66ac9db | 861 | |
a1d8b49a | 862 | spin_lock_irqsave(&cmd->t_state_lock, flags); |
c66ac9db NB |
863 | atomic_set(&task->task_active, 0); |
864 | ||
865 | /* | |
866 | * See if any sense data exists, if so set the TASK_SENSE flag. | |
867 | * Also check for any other post completion work that needs to be | |
868 | * done by the plugins. | |
869 | */ | |
870 | if (dev && dev->transport->transport_complete) { | |
871 | if (dev->transport->transport_complete(task) != 0) { | |
872 | cmd->se_cmd_flags |= SCF_TRANSPORT_TASK_SENSE; | |
873 | task->task_sense = 1; | |
874 | success = 1; | |
875 | } | |
876 | } | |
877 | ||
878 | /* | |
879 | * See if we are waiting for outstanding struct se_task | |
880 | * to complete for an exception condition | |
881 | */ | |
882 | if (atomic_read(&task->task_stop)) { | |
883 | /* | |
a1d8b49a | 884 | * Decrement cmd->t_se_count if this task had |
c66ac9db NB |
885 | * previously thrown its timeout exception handler. |
886 | */ | |
887 | if (atomic_read(&task->task_timeout)) { | |
a1d8b49a | 888 | atomic_dec(&cmd->t_se_count); |
c66ac9db NB |
889 | atomic_set(&task->task_timeout, 0); |
890 | } | |
a1d8b49a | 891 | spin_unlock_irqrestore(&cmd->t_state_lock, flags); |
c66ac9db NB |
892 | |
893 | complete(&task->task_stop_comp); | |
894 | return; | |
895 | } | |
896 | /* | |
897 | * If the task's timeout handler has fired, use the t_task_cdbs_timeout | |
898 | * left counter to determine when the struct se_cmd is ready to be queued to | |
899 | * the processing thread. | |
900 | */ | |
901 | if (atomic_read(&task->task_timeout)) { | |
902 | if (!(atomic_dec_and_test( | |
a1d8b49a AG |
903 | &cmd->t_task_cdbs_timeout_left))) { |
904 | spin_unlock_irqrestore(&cmd->t_state_lock, | |
c66ac9db NB |
905 | flags); |
906 | return; | |
907 | } | |
908 | t_state = TRANSPORT_COMPLETE_TIMEOUT; | |
a1d8b49a | 909 | spin_unlock_irqrestore(&cmd->t_state_lock, flags); |
c66ac9db NB |
910 | |
911 | transport_add_cmd_to_queue(cmd, t_state); | |
912 | return; | |
913 | } | |
a1d8b49a | 914 | atomic_dec(&cmd->t_task_cdbs_timeout_left); |
c66ac9db NB |
915 | |
916 | /* | |
917 | * Decrement the outstanding t_task_cdbs_left count. The last | |
918 | * struct se_task from struct se_cmd will complete itself into the | |
919 | * device queue depending upon int success. | |
920 | */ | |
a1d8b49a | 921 | if (!(atomic_dec_and_test(&cmd->t_task_cdbs_left))) { |
c66ac9db | 922 | if (!success) |
a1d8b49a | 923 | cmd->t_tasks_failed = 1; |
c66ac9db | 924 | |
a1d8b49a | 925 | spin_unlock_irqrestore(&cmd->t_state_lock, flags); |
c66ac9db NB |
926 | return; |
927 | } | |
928 | ||
a1d8b49a | 929 | if (!success || cmd->t_tasks_failed) { |
c66ac9db NB |
930 | t_state = TRANSPORT_COMPLETE_FAILURE; |
931 | if (!task->task_error_status) { | |
932 | task->task_error_status = | |
933 | PYX_TRANSPORT_UNKNOWN_SAM_OPCODE; | |
934 | cmd->transport_error_status = | |
935 | PYX_TRANSPORT_UNKNOWN_SAM_OPCODE; | |
936 | } | |
937 | } else { | |
a1d8b49a | 938 | atomic_set(&cmd->t_transport_complete, 1); |
c66ac9db NB |
939 | t_state = TRANSPORT_COMPLETE_OK; |
940 | } | |
a1d8b49a | 941 | spin_unlock_irqrestore(&cmd->t_state_lock, flags); |
c66ac9db NB |
942 | |
943 | transport_add_cmd_to_queue(cmd, t_state); | |
944 | } | |
945 | EXPORT_SYMBOL(transport_complete_task); | |
946 | ||
947 | /* | |
948 | * Called by transport_add_tasks_from_cmd() once a struct se_cmd's | |
949 | * struct se_task list are ready to be added to the active execution list | |
950 | * struct se_device | |
951 | ||
952 | * Called with se_dev_t->execute_task_lock called. | |
953 | */ | |
954 | static inline int transport_add_task_check_sam_attr( | |
955 | struct se_task *task, | |
956 | struct se_task *task_prev, | |
957 | struct se_device *dev) | |
958 | { | |
959 | /* | |
960 | * No SAM Task attribute emulation enabled, add to tail of | |
961 | * execution queue | |
962 | */ | |
963 | if (dev->dev_task_attr_type != SAM_TASK_ATTR_EMULATED) { | |
964 | list_add_tail(&task->t_execute_list, &dev->execute_task_list); | |
965 | return 0; | |
966 | } | |
967 | /* | |
968 | * HEAD_OF_QUEUE attribute for received CDB, which means | |
969 | * the first task that is associated with a struct se_cmd goes to | |
970 | * head of the struct se_device->execute_task_list, and task_prev | |
971 | * after that for each subsequent task | |
972 | */ | |
e66ecd50 | 973 | if (task->task_se_cmd->sam_task_attr == MSG_HEAD_TAG) { |
c66ac9db NB |
974 | list_add(&task->t_execute_list, |
975 | (task_prev != NULL) ? | |
976 | &task_prev->t_execute_list : | |
977 | &dev->execute_task_list); | |
978 | ||
979 | DEBUG_STA("Set HEAD_OF_QUEUE for task CDB: 0x%02x" | |
980 | " in execution queue\n", | |
981 | T_TASK(task->task_se_cmd)->t_task_cdb[0]); | |
982 | return 1; | |
983 | } | |
984 | /* | |
985 | * For ORDERED, SIMPLE or UNTAGGED attribute tasks once they have been | |
986 | * transitioned from Dermant -> Active state, and are added to the end | |
987 | * of the struct se_device->execute_task_list | |
988 | */ | |
989 | list_add_tail(&task->t_execute_list, &dev->execute_task_list); | |
990 | return 0; | |
991 | } | |
992 | ||
993 | /* __transport_add_task_to_execute_queue(): | |
994 | * | |
995 | * Called with se_dev_t->execute_task_lock called. | |
996 | */ | |
997 | static void __transport_add_task_to_execute_queue( | |
998 | struct se_task *task, | |
999 | struct se_task *task_prev, | |
1000 | struct se_device *dev) | |
1001 | { | |
1002 | int head_of_queue; | |
1003 | ||
1004 | head_of_queue = transport_add_task_check_sam_attr(task, task_prev, dev); | |
1005 | atomic_inc(&dev->execute_tasks); | |
1006 | ||
1007 | if (atomic_read(&task->task_state_active)) | |
1008 | return; | |
1009 | /* | |
1010 | * Determine if this task needs to go to HEAD_OF_QUEUE for the | |
1011 | * state list as well. Running with SAM Task Attribute emulation | |
1012 | * will always return head_of_queue == 0 here | |
1013 | */ | |
1014 | if (head_of_queue) | |
1015 | list_add(&task->t_state_list, (task_prev) ? | |
1016 | &task_prev->t_state_list : | |
1017 | &dev->state_task_list); | |
1018 | else | |
1019 | list_add_tail(&task->t_state_list, &dev->state_task_list); | |
1020 | ||
1021 | atomic_set(&task->task_state_active, 1); | |
1022 | ||
1023 | DEBUG_TSTATE("Added ITT: 0x%08x task[%p] to dev: %p\n", | |
e3d6f909 | 1024 | task->task_se_cmd->se_tfo->get_task_tag(task->task_se_cmd), |
c66ac9db NB |
1025 | task, dev); |
1026 | } | |
1027 | ||
1028 | static void transport_add_tasks_to_state_queue(struct se_cmd *cmd) | |
1029 | { | |
1030 | struct se_device *dev; | |
1031 | struct se_task *task; | |
1032 | unsigned long flags; | |
1033 | ||
a1d8b49a AG |
1034 | spin_lock_irqsave(&cmd->t_state_lock, flags); |
1035 | list_for_each_entry(task, &cmd->t_task_list, t_list) { | |
c66ac9db NB |
1036 | dev = task->se_dev; |
1037 | ||
1038 | if (atomic_read(&task->task_state_active)) | |
1039 | continue; | |
1040 | ||
1041 | spin_lock(&dev->execute_task_lock); | |
1042 | list_add_tail(&task->t_state_list, &dev->state_task_list); | |
1043 | atomic_set(&task->task_state_active, 1); | |
1044 | ||
1045 | DEBUG_TSTATE("Added ITT: 0x%08x task[%p] to dev: %p\n", | |
e3d6f909 | 1046 | task->se_cmd->se_tfo->get_task_tag( |
c66ac9db NB |
1047 | task->task_se_cmd), task, dev); |
1048 | ||
1049 | spin_unlock(&dev->execute_task_lock); | |
1050 | } | |
a1d8b49a | 1051 | spin_unlock_irqrestore(&cmd->t_state_lock, flags); |
c66ac9db NB |
1052 | } |
1053 | ||
1054 | static void transport_add_tasks_from_cmd(struct se_cmd *cmd) | |
1055 | { | |
5951146d | 1056 | struct se_device *dev = cmd->se_dev; |
c66ac9db NB |
1057 | struct se_task *task, *task_prev = NULL; |
1058 | unsigned long flags; | |
1059 | ||
1060 | spin_lock_irqsave(&dev->execute_task_lock, flags); | |
a1d8b49a | 1061 | list_for_each_entry(task, &cmd->t_task_list, t_list) { |
c66ac9db NB |
1062 | if (atomic_read(&task->task_execute_queue)) |
1063 | continue; | |
1064 | /* | |
1065 | * __transport_add_task_to_execute_queue() handles the | |
1066 | * SAM Task Attribute emulation if enabled | |
1067 | */ | |
1068 | __transport_add_task_to_execute_queue(task, task_prev, dev); | |
1069 | atomic_set(&task->task_execute_queue, 1); | |
1070 | task_prev = task; | |
1071 | } | |
1072 | spin_unlock_irqrestore(&dev->execute_task_lock, flags); | |
c66ac9db NB |
1073 | } |
1074 | ||
1075 | /* transport_remove_task_from_execute_queue(): | |
1076 | * | |
1077 | * | |
1078 | */ | |
52208ae3 | 1079 | void transport_remove_task_from_execute_queue( |
c66ac9db NB |
1080 | struct se_task *task, |
1081 | struct se_device *dev) | |
1082 | { | |
1083 | unsigned long flags; | |
1084 | ||
af57c3ac NB |
1085 | if (atomic_read(&task->task_execute_queue) == 0) { |
1086 | dump_stack(); | |
1087 | return; | |
1088 | } | |
1089 | ||
c66ac9db NB |
1090 | spin_lock_irqsave(&dev->execute_task_lock, flags); |
1091 | list_del(&task->t_execute_list); | |
af57c3ac | 1092 | atomic_set(&task->task_execute_queue, 0); |
c66ac9db NB |
1093 | atomic_dec(&dev->execute_tasks); |
1094 | spin_unlock_irqrestore(&dev->execute_task_lock, flags); | |
1095 | } | |
1096 | ||
07bde79a NB |
1097 | /* |
1098 | * Handle QUEUE_FULL / -EAGAIN status | |
1099 | */ | |
1100 | ||
1101 | static void target_qf_do_work(struct work_struct *work) | |
1102 | { | |
1103 | struct se_device *dev = container_of(work, struct se_device, | |
1104 | qf_work_queue); | |
1105 | struct se_cmd *cmd, *cmd_tmp; | |
1106 | ||
1107 | spin_lock_irq(&dev->qf_cmd_lock); | |
1108 | list_for_each_entry_safe(cmd, cmd_tmp, &dev->qf_cmd_list, se_qf_node) { | |
1109 | ||
1110 | list_del(&cmd->se_qf_node); | |
1111 | atomic_dec(&dev->dev_qf_count); | |
1112 | smp_mb__after_atomic_dec(); | |
1113 | spin_unlock_irq(&dev->qf_cmd_lock); | |
1114 | ||
1115 | printk(KERN_INFO "Processing %s cmd: %p QUEUE_FULL in work queue" | |
1116 | " context: %s\n", cmd->se_tfo->get_fabric_name(), cmd, | |
1117 | (cmd->t_state == TRANSPORT_COMPLETE_OK) ? "COMPLETE_OK" : | |
1118 | (cmd->t_state == TRANSPORT_COMPLETE_QF_WP) ? "WRITE_PENDING" | |
1119 | : "UNKNOWN"); | |
1120 | /* | |
1121 | * The SCF_EMULATE_QUEUE_FULL flag will be cleared once se_cmd | |
1122 | * has been added to head of queue | |
1123 | */ | |
1124 | transport_add_cmd_to_queue(cmd, cmd->t_state); | |
1125 | ||
1126 | spin_lock_irq(&dev->qf_cmd_lock); | |
1127 | } | |
1128 | spin_unlock_irq(&dev->qf_cmd_lock); | |
1129 | } | |
1130 | ||
c66ac9db NB |
1131 | unsigned char *transport_dump_cmd_direction(struct se_cmd *cmd) |
1132 | { | |
1133 | switch (cmd->data_direction) { | |
1134 | case DMA_NONE: | |
1135 | return "NONE"; | |
1136 | case DMA_FROM_DEVICE: | |
1137 | return "READ"; | |
1138 | case DMA_TO_DEVICE: | |
1139 | return "WRITE"; | |
1140 | case DMA_BIDIRECTIONAL: | |
1141 | return "BIDI"; | |
1142 | default: | |
1143 | break; | |
1144 | } | |
1145 | ||
1146 | return "UNKNOWN"; | |
1147 | } | |
1148 | ||
1149 | void transport_dump_dev_state( | |
1150 | struct se_device *dev, | |
1151 | char *b, | |
1152 | int *bl) | |
1153 | { | |
1154 | *bl += sprintf(b + *bl, "Status: "); | |
1155 | switch (dev->dev_status) { | |
1156 | case TRANSPORT_DEVICE_ACTIVATED: | |
1157 | *bl += sprintf(b + *bl, "ACTIVATED"); | |
1158 | break; | |
1159 | case TRANSPORT_DEVICE_DEACTIVATED: | |
1160 | *bl += sprintf(b + *bl, "DEACTIVATED"); | |
1161 | break; | |
1162 | case TRANSPORT_DEVICE_SHUTDOWN: | |
1163 | *bl += sprintf(b + *bl, "SHUTDOWN"); | |
1164 | break; | |
1165 | case TRANSPORT_DEVICE_OFFLINE_ACTIVATED: | |
1166 | case TRANSPORT_DEVICE_OFFLINE_DEACTIVATED: | |
1167 | *bl += sprintf(b + *bl, "OFFLINE"); | |
1168 | break; | |
1169 | default: | |
1170 | *bl += sprintf(b + *bl, "UNKNOWN=%d", dev->dev_status); | |
1171 | break; | |
1172 | } | |
1173 | ||
1174 | *bl += sprintf(b + *bl, " Execute/Left/Max Queue Depth: %d/%d/%d", | |
1175 | atomic_read(&dev->execute_tasks), atomic_read(&dev->depth_left), | |
1176 | dev->queue_depth); | |
1177 | *bl += sprintf(b + *bl, " SectorSize: %u MaxSectors: %u\n", | |
e3d6f909 | 1178 | dev->se_sub_dev->se_dev_attrib.block_size, dev->se_sub_dev->se_dev_attrib.max_sectors); |
c66ac9db NB |
1179 | *bl += sprintf(b + *bl, " "); |
1180 | } | |
1181 | ||
1182 | /* transport_release_all_cmds(): | |
1183 | * | |
1184 | * | |
1185 | */ | |
1186 | static void transport_release_all_cmds(struct se_device *dev) | |
1187 | { | |
5951146d | 1188 | struct se_cmd *cmd, *tcmd; |
c66ac9db NB |
1189 | int bug_out = 0, t_state; |
1190 | unsigned long flags; | |
1191 | ||
e3d6f909 | 1192 | spin_lock_irqsave(&dev->dev_queue_obj.cmd_queue_lock, flags); |
5951146d AG |
1193 | list_for_each_entry_safe(cmd, tcmd, &dev->dev_queue_obj.qobj_list, |
1194 | se_queue_node) { | |
1195 | t_state = cmd->t_state; | |
1196 | list_del(&cmd->se_queue_node); | |
e3d6f909 | 1197 | spin_unlock_irqrestore(&dev->dev_queue_obj.cmd_queue_lock, |
c66ac9db NB |
1198 | flags); |
1199 | ||
1200 | printk(KERN_ERR "Releasing ITT: 0x%08x, i_state: %u," | |
1201 | " t_state: %u directly\n", | |
e3d6f909 AG |
1202 | cmd->se_tfo->get_task_tag(cmd), |
1203 | cmd->se_tfo->get_cmd_state(cmd), t_state); | |
c66ac9db NB |
1204 | |
1205 | transport_release_fe_cmd(cmd); | |
1206 | bug_out = 1; | |
1207 | ||
e3d6f909 | 1208 | spin_lock_irqsave(&dev->dev_queue_obj.cmd_queue_lock, flags); |
c66ac9db | 1209 | } |
e3d6f909 | 1210 | spin_unlock_irqrestore(&dev->dev_queue_obj.cmd_queue_lock, flags); |
c66ac9db NB |
1211 | #if 0 |
1212 | if (bug_out) | |
1213 | BUG(); | |
1214 | #endif | |
1215 | } | |
1216 | ||
1217 | void transport_dump_vpd_proto_id( | |
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 len; | |
1224 | ||
1225 | memset(buf, 0, VPD_TMP_BUF_SIZE); | |
1226 | len = sprintf(buf, "T10 VPD Protocol Identifier: "); | |
1227 | ||
1228 | switch (vpd->protocol_identifier) { | |
1229 | case 0x00: | |
1230 | sprintf(buf+len, "Fibre Channel\n"); | |
1231 | break; | |
1232 | case 0x10: | |
1233 | sprintf(buf+len, "Parallel SCSI\n"); | |
1234 | break; | |
1235 | case 0x20: | |
1236 | sprintf(buf+len, "SSA\n"); | |
1237 | break; | |
1238 | case 0x30: | |
1239 | sprintf(buf+len, "IEEE 1394\n"); | |
1240 | break; | |
1241 | case 0x40: | |
1242 | sprintf(buf+len, "SCSI Remote Direct Memory Access" | |
1243 | " Protocol\n"); | |
1244 | break; | |
1245 | case 0x50: | |
1246 | sprintf(buf+len, "Internet SCSI (iSCSI)\n"); | |
1247 | break; | |
1248 | case 0x60: | |
1249 | sprintf(buf+len, "SAS Serial SCSI Protocol\n"); | |
1250 | break; | |
1251 | case 0x70: | |
1252 | sprintf(buf+len, "Automation/Drive Interface Transport" | |
1253 | " Protocol\n"); | |
1254 | break; | |
1255 | case 0x80: | |
1256 | sprintf(buf+len, "AT Attachment Interface ATA/ATAPI\n"); | |
1257 | break; | |
1258 | default: | |
1259 | sprintf(buf+len, "Unknown 0x%02x\n", | |
1260 | vpd->protocol_identifier); | |
1261 | break; | |
1262 | } | |
1263 | ||
1264 | if (p_buf) | |
1265 | strncpy(p_buf, buf, p_buf_len); | |
1266 | else | |
1267 | printk(KERN_INFO "%s", buf); | |
1268 | } | |
1269 | ||
1270 | void | |
1271 | transport_set_vpd_proto_id(struct t10_vpd *vpd, unsigned char *page_83) | |
1272 | { | |
1273 | /* | |
1274 | * Check if the Protocol Identifier Valid (PIV) bit is set.. | |
1275 | * | |
1276 | * from spc3r23.pdf section 7.5.1 | |
1277 | */ | |
1278 | if (page_83[1] & 0x80) { | |
1279 | vpd->protocol_identifier = (page_83[0] & 0xf0); | |
1280 | vpd->protocol_identifier_set = 1; | |
1281 | transport_dump_vpd_proto_id(vpd, NULL, 0); | |
1282 | } | |
1283 | } | |
1284 | EXPORT_SYMBOL(transport_set_vpd_proto_id); | |
1285 | ||
1286 | int transport_dump_vpd_assoc( | |
1287 | struct t10_vpd *vpd, | |
1288 | unsigned char *p_buf, | |
1289 | int p_buf_len) | |
1290 | { | |
1291 | unsigned char buf[VPD_TMP_BUF_SIZE]; | |
e3d6f909 AG |
1292 | int ret = 0; |
1293 | int len; | |
c66ac9db NB |
1294 | |
1295 | memset(buf, 0, VPD_TMP_BUF_SIZE); | |
1296 | len = sprintf(buf, "T10 VPD Identifier Association: "); | |
1297 | ||
1298 | switch (vpd->association) { | |
1299 | case 0x00: | |
1300 | sprintf(buf+len, "addressed logical unit\n"); | |
1301 | break; | |
1302 | case 0x10: | |
1303 | sprintf(buf+len, "target port\n"); | |
1304 | break; | |
1305 | case 0x20: | |
1306 | sprintf(buf+len, "SCSI target device\n"); | |
1307 | break; | |
1308 | default: | |
1309 | sprintf(buf+len, "Unknown 0x%02x\n", vpd->association); | |
e3d6f909 | 1310 | ret = -EINVAL; |
c66ac9db NB |
1311 | break; |
1312 | } | |
1313 | ||
1314 | if (p_buf) | |
1315 | strncpy(p_buf, buf, p_buf_len); | |
1316 | else | |
1317 | printk("%s", buf); | |
1318 | ||
1319 | return ret; | |
1320 | } | |
1321 | ||
1322 | int transport_set_vpd_assoc(struct t10_vpd *vpd, unsigned char *page_83) | |
1323 | { | |
1324 | /* | |
1325 | * The VPD identification association.. | |
1326 | * | |
1327 | * from spc3r23.pdf Section 7.6.3.1 Table 297 | |
1328 | */ | |
1329 | vpd->association = (page_83[1] & 0x30); | |
1330 | return transport_dump_vpd_assoc(vpd, NULL, 0); | |
1331 | } | |
1332 | EXPORT_SYMBOL(transport_set_vpd_assoc); | |
1333 | ||
1334 | int transport_dump_vpd_ident_type( | |
1335 | struct t10_vpd *vpd, | |
1336 | unsigned char *p_buf, | |
1337 | int p_buf_len) | |
1338 | { | |
1339 | unsigned char buf[VPD_TMP_BUF_SIZE]; | |
e3d6f909 AG |
1340 | int ret = 0; |
1341 | int len; | |
c66ac9db NB |
1342 | |
1343 | memset(buf, 0, VPD_TMP_BUF_SIZE); | |
1344 | len = sprintf(buf, "T10 VPD Identifier Type: "); | |
1345 | ||
1346 | switch (vpd->device_identifier_type) { | |
1347 | case 0x00: | |
1348 | sprintf(buf+len, "Vendor specific\n"); | |
1349 | break; | |
1350 | case 0x01: | |
1351 | sprintf(buf+len, "T10 Vendor ID based\n"); | |
1352 | break; | |
1353 | case 0x02: | |
1354 | sprintf(buf+len, "EUI-64 based\n"); | |
1355 | break; | |
1356 | case 0x03: | |
1357 | sprintf(buf+len, "NAA\n"); | |
1358 | break; | |
1359 | case 0x04: | |
1360 | sprintf(buf+len, "Relative target port identifier\n"); | |
1361 | break; | |
1362 | case 0x08: | |
1363 | sprintf(buf+len, "SCSI name string\n"); | |
1364 | break; | |
1365 | default: | |
1366 | sprintf(buf+len, "Unsupported: 0x%02x\n", | |
1367 | vpd->device_identifier_type); | |
e3d6f909 | 1368 | ret = -EINVAL; |
c66ac9db NB |
1369 | break; |
1370 | } | |
1371 | ||
e3d6f909 AG |
1372 | if (p_buf) { |
1373 | if (p_buf_len < strlen(buf)+1) | |
1374 | return -EINVAL; | |
c66ac9db | 1375 | strncpy(p_buf, buf, p_buf_len); |
e3d6f909 | 1376 | } else { |
c66ac9db | 1377 | printk("%s", buf); |
e3d6f909 | 1378 | } |
c66ac9db NB |
1379 | |
1380 | return ret; | |
1381 | } | |
1382 | ||
1383 | int transport_set_vpd_ident_type(struct t10_vpd *vpd, unsigned char *page_83) | |
1384 | { | |
1385 | /* | |
1386 | * The VPD identifier type.. | |
1387 | * | |
1388 | * from spc3r23.pdf Section 7.6.3.1 Table 298 | |
1389 | */ | |
1390 | vpd->device_identifier_type = (page_83[1] & 0x0f); | |
1391 | return transport_dump_vpd_ident_type(vpd, NULL, 0); | |
1392 | } | |
1393 | EXPORT_SYMBOL(transport_set_vpd_ident_type); | |
1394 | ||
1395 | int transport_dump_vpd_ident( | |
1396 | struct t10_vpd *vpd, | |
1397 | unsigned char *p_buf, | |
1398 | int p_buf_len) | |
1399 | { | |
1400 | unsigned char buf[VPD_TMP_BUF_SIZE]; | |
1401 | int ret = 0; | |
1402 | ||
1403 | memset(buf, 0, VPD_TMP_BUF_SIZE); | |
1404 | ||
1405 | switch (vpd->device_identifier_code_set) { | |
1406 | case 0x01: /* Binary */ | |
1407 | sprintf(buf, "T10 VPD Binary Device Identifier: %s\n", | |
1408 | &vpd->device_identifier[0]); | |
1409 | break; | |
1410 | case 0x02: /* ASCII */ | |
1411 | sprintf(buf, "T10 VPD ASCII Device Identifier: %s\n", | |
1412 | &vpd->device_identifier[0]); | |
1413 | break; | |
1414 | case 0x03: /* UTF-8 */ | |
1415 | sprintf(buf, "T10 VPD UTF-8 Device Identifier: %s\n", | |
1416 | &vpd->device_identifier[0]); | |
1417 | break; | |
1418 | default: | |
1419 | sprintf(buf, "T10 VPD Device Identifier encoding unsupported:" | |
1420 | " 0x%02x", vpd->device_identifier_code_set); | |
e3d6f909 | 1421 | ret = -EINVAL; |
c66ac9db NB |
1422 | break; |
1423 | } | |
1424 | ||
1425 | if (p_buf) | |
1426 | strncpy(p_buf, buf, p_buf_len); | |
1427 | else | |
1428 | printk("%s", buf); | |
1429 | ||
1430 | return ret; | |
1431 | } | |
1432 | ||
1433 | int | |
1434 | transport_set_vpd_ident(struct t10_vpd *vpd, unsigned char *page_83) | |
1435 | { | |
1436 | static const char hex_str[] = "0123456789abcdef"; | |
1437 | int j = 0, i = 4; /* offset to start of the identifer */ | |
1438 | ||
1439 | /* | |
1440 | * The VPD Code Set (encoding) | |
1441 | * | |
1442 | * from spc3r23.pdf Section 7.6.3.1 Table 296 | |
1443 | */ | |
1444 | vpd->device_identifier_code_set = (page_83[0] & 0x0f); | |
1445 | switch (vpd->device_identifier_code_set) { | |
1446 | case 0x01: /* Binary */ | |
1447 | vpd->device_identifier[j++] = | |
1448 | hex_str[vpd->device_identifier_type]; | |
1449 | while (i < (4 + page_83[3])) { | |
1450 | vpd->device_identifier[j++] = | |
1451 | hex_str[(page_83[i] & 0xf0) >> 4]; | |
1452 | vpd->device_identifier[j++] = | |
1453 | hex_str[page_83[i] & 0x0f]; | |
1454 | i++; | |
1455 | } | |
1456 | break; | |
1457 | case 0x02: /* ASCII */ | |
1458 | case 0x03: /* UTF-8 */ | |
1459 | while (i < (4 + page_83[3])) | |
1460 | vpd->device_identifier[j++] = page_83[i++]; | |
1461 | break; | |
1462 | default: | |
1463 | break; | |
1464 | } | |
1465 | ||
1466 | return transport_dump_vpd_ident(vpd, NULL, 0); | |
1467 | } | |
1468 | EXPORT_SYMBOL(transport_set_vpd_ident); | |
1469 | ||
1470 | static void core_setup_task_attr_emulation(struct se_device *dev) | |
1471 | { | |
1472 | /* | |
1473 | * If this device is from Target_Core_Mod/pSCSI, disable the | |
1474 | * SAM Task Attribute emulation. | |
1475 | * | |
1476 | * This is currently not available in upsream Linux/SCSI Target | |
1477 | * mode code, and is assumed to be disabled while using TCM/pSCSI. | |
1478 | */ | |
e3d6f909 | 1479 | if (dev->transport->transport_type == TRANSPORT_PLUGIN_PHBA_PDEV) { |
c66ac9db NB |
1480 | dev->dev_task_attr_type = SAM_TASK_ATTR_PASSTHROUGH; |
1481 | return; | |
1482 | } | |
1483 | ||
1484 | dev->dev_task_attr_type = SAM_TASK_ATTR_EMULATED; | |
1485 | DEBUG_STA("%s: Using SAM_TASK_ATTR_EMULATED for SPC: 0x%02x" | |
e3d6f909 AG |
1486 | " device\n", dev->transport->name, |
1487 | dev->transport->get_device_rev(dev)); | |
c66ac9db NB |
1488 | } |
1489 | ||
1490 | static void scsi_dump_inquiry(struct se_device *dev) | |
1491 | { | |
e3d6f909 | 1492 | struct t10_wwn *wwn = &dev->se_sub_dev->t10_wwn; |
c66ac9db NB |
1493 | int i, device_type; |
1494 | /* | |
1495 | * Print Linux/SCSI style INQUIRY formatting to the kernel ring buffer | |
1496 | */ | |
1497 | printk(" Vendor: "); | |
1498 | for (i = 0; i < 8; i++) | |
1499 | if (wwn->vendor[i] >= 0x20) | |
1500 | printk("%c", wwn->vendor[i]); | |
1501 | else | |
1502 | printk(" "); | |
1503 | ||
1504 | printk(" Model: "); | |
1505 | for (i = 0; i < 16; i++) | |
1506 | if (wwn->model[i] >= 0x20) | |
1507 | printk("%c", wwn->model[i]); | |
1508 | else | |
1509 | printk(" "); | |
1510 | ||
1511 | printk(" Revision: "); | |
1512 | for (i = 0; i < 4; i++) | |
1513 | if (wwn->revision[i] >= 0x20) | |
1514 | printk("%c", wwn->revision[i]); | |
1515 | else | |
1516 | printk(" "); | |
1517 | ||
1518 | printk("\n"); | |
1519 | ||
e3d6f909 | 1520 | device_type = dev->transport->get_device_type(dev); |
c66ac9db NB |
1521 | printk(" Type: %s ", scsi_device_type(device_type)); |
1522 | printk(" ANSI SCSI revision: %02x\n", | |
e3d6f909 | 1523 | dev->transport->get_device_rev(dev)); |
c66ac9db NB |
1524 | } |
1525 | ||
1526 | struct se_device *transport_add_device_to_core_hba( | |
1527 | struct se_hba *hba, | |
1528 | struct se_subsystem_api *transport, | |
1529 | struct se_subsystem_dev *se_dev, | |
1530 | u32 device_flags, | |
1531 | void *transport_dev, | |
1532 | struct se_dev_limits *dev_limits, | |
1533 | const char *inquiry_prod, | |
1534 | const char *inquiry_rev) | |
1535 | { | |
12a18bdc | 1536 | int force_pt; |
c66ac9db NB |
1537 | struct se_device *dev; |
1538 | ||
1539 | dev = kzalloc(sizeof(struct se_device), GFP_KERNEL); | |
1540 | if (!(dev)) { | |
1541 | printk(KERN_ERR "Unable to allocate memory for se_dev_t\n"); | |
1542 | return NULL; | |
1543 | } | |
c66ac9db | 1544 | |
e3d6f909 | 1545 | transport_init_queue_obj(&dev->dev_queue_obj); |
c66ac9db NB |
1546 | dev->dev_flags = device_flags; |
1547 | dev->dev_status |= TRANSPORT_DEVICE_DEACTIVATED; | |
5951146d | 1548 | dev->dev_ptr = transport_dev; |
c66ac9db NB |
1549 | dev->se_hba = hba; |
1550 | dev->se_sub_dev = se_dev; | |
1551 | dev->transport = transport; | |
1552 | atomic_set(&dev->active_cmds, 0); | |
1553 | INIT_LIST_HEAD(&dev->dev_list); | |
1554 | INIT_LIST_HEAD(&dev->dev_sep_list); | |
1555 | INIT_LIST_HEAD(&dev->dev_tmr_list); | |
1556 | INIT_LIST_HEAD(&dev->execute_task_list); | |
1557 | INIT_LIST_HEAD(&dev->delayed_cmd_list); | |
1558 | INIT_LIST_HEAD(&dev->ordered_cmd_list); | |
1559 | INIT_LIST_HEAD(&dev->state_task_list); | |
07bde79a | 1560 | INIT_LIST_HEAD(&dev->qf_cmd_list); |
c66ac9db NB |
1561 | spin_lock_init(&dev->execute_task_lock); |
1562 | spin_lock_init(&dev->delayed_cmd_lock); | |
1563 | spin_lock_init(&dev->ordered_cmd_lock); | |
1564 | spin_lock_init(&dev->state_task_lock); | |
1565 | spin_lock_init(&dev->dev_alua_lock); | |
1566 | spin_lock_init(&dev->dev_reservation_lock); | |
1567 | spin_lock_init(&dev->dev_status_lock); | |
1568 | spin_lock_init(&dev->dev_status_thr_lock); | |
1569 | spin_lock_init(&dev->se_port_lock); | |
1570 | spin_lock_init(&dev->se_tmr_lock); | |
07bde79a | 1571 | spin_lock_init(&dev->qf_cmd_lock); |
c66ac9db NB |
1572 | |
1573 | dev->queue_depth = dev_limits->queue_depth; | |
1574 | atomic_set(&dev->depth_left, dev->queue_depth); | |
1575 | atomic_set(&dev->dev_ordered_id, 0); | |
1576 | ||
1577 | se_dev_set_default_attribs(dev, dev_limits); | |
1578 | ||
1579 | dev->dev_index = scsi_get_new_index(SCSI_DEVICE_INDEX); | |
1580 | dev->creation_time = get_jiffies_64(); | |
1581 | spin_lock_init(&dev->stats_lock); | |
1582 | ||
1583 | spin_lock(&hba->device_lock); | |
1584 | list_add_tail(&dev->dev_list, &hba->hba_dev_list); | |
1585 | hba->dev_count++; | |
1586 | spin_unlock(&hba->device_lock); | |
1587 | /* | |
1588 | * Setup the SAM Task Attribute emulation for struct se_device | |
1589 | */ | |
1590 | core_setup_task_attr_emulation(dev); | |
1591 | /* | |
1592 | * Force PR and ALUA passthrough emulation with internal object use. | |
1593 | */ | |
1594 | force_pt = (hba->hba_flags & HBA_FLAGS_INTERNAL_USE); | |
1595 | /* | |
1596 | * Setup the Reservations infrastructure for struct se_device | |
1597 | */ | |
1598 | core_setup_reservations(dev, force_pt); | |
1599 | /* | |
1600 | * Setup the Asymmetric Logical Unit Assignment for struct se_device | |
1601 | */ | |
1602 | if (core_setup_alua(dev, force_pt) < 0) | |
1603 | goto out; | |
1604 | ||
1605 | /* | |
1606 | * Startup the struct se_device processing thread | |
1607 | */ | |
1608 | dev->process_thread = kthread_run(transport_processing_thread, dev, | |
e3d6f909 | 1609 | "LIO_%s", dev->transport->name); |
c66ac9db NB |
1610 | if (IS_ERR(dev->process_thread)) { |
1611 | printk(KERN_ERR "Unable to create kthread: LIO_%s\n", | |
e3d6f909 | 1612 | dev->transport->name); |
c66ac9db NB |
1613 | goto out; |
1614 | } | |
07bde79a NB |
1615 | /* |
1616 | * Setup work_queue for QUEUE_FULL | |
1617 | */ | |
1618 | INIT_WORK(&dev->qf_work_queue, target_qf_do_work); | |
c66ac9db NB |
1619 | /* |
1620 | * Preload the initial INQUIRY const values if we are doing | |
1621 | * anything virtual (IBLOCK, FILEIO, RAMDISK), but not for TCM/pSCSI | |
1622 | * passthrough because this is being provided by the backend LLD. | |
1623 | * This is required so that transport_get_inquiry() copies these | |
1624 | * originals once back into DEV_T10_WWN(dev) for the virtual device | |
1625 | * setup. | |
1626 | */ | |
e3d6f909 | 1627 | if (dev->transport->transport_type != TRANSPORT_PLUGIN_PHBA_PDEV) { |
f22c1196 | 1628 | if (!inquiry_prod || !inquiry_rev) { |
c66ac9db NB |
1629 | printk(KERN_ERR "All non TCM/pSCSI plugins require" |
1630 | " INQUIRY consts\n"); | |
1631 | goto out; | |
1632 | } | |
1633 | ||
e3d6f909 AG |
1634 | strncpy(&dev->se_sub_dev->t10_wwn.vendor[0], "LIO-ORG", 8); |
1635 | strncpy(&dev->se_sub_dev->t10_wwn.model[0], inquiry_prod, 16); | |
1636 | strncpy(&dev->se_sub_dev->t10_wwn.revision[0], inquiry_rev, 4); | |
c66ac9db NB |
1637 | } |
1638 | scsi_dump_inquiry(dev); | |
1639 | ||
12a18bdc | 1640 | return dev; |
c66ac9db | 1641 | out: |
c66ac9db NB |
1642 | kthread_stop(dev->process_thread); |
1643 | ||
1644 | spin_lock(&hba->device_lock); | |
1645 | list_del(&dev->dev_list); | |
1646 | hba->dev_count--; | |
1647 | spin_unlock(&hba->device_lock); | |
1648 | ||
1649 | se_release_vpd_for_dev(dev); | |
1650 | ||
c66ac9db NB |
1651 | kfree(dev); |
1652 | ||
1653 | return NULL; | |
1654 | } | |
1655 | EXPORT_SYMBOL(transport_add_device_to_core_hba); | |
1656 | ||
1657 | /* transport_generic_prepare_cdb(): | |
1658 | * | |
1659 | * Since the Initiator sees iSCSI devices as LUNs, the SCSI CDB will | |
1660 | * contain the iSCSI LUN in bits 7-5 of byte 1 as per SAM-2. | |
1661 | * The point of this is since we are mapping iSCSI LUNs to | |
1662 | * SCSI Target IDs having a non-zero LUN in the CDB will throw the | |
1663 | * devices and HBAs for a loop. | |
1664 | */ | |
1665 | static inline void transport_generic_prepare_cdb( | |
1666 | unsigned char *cdb) | |
1667 | { | |
1668 | switch (cdb[0]) { | |
1669 | case READ_10: /* SBC - RDProtect */ | |
1670 | case READ_12: /* SBC - RDProtect */ | |
1671 | case READ_16: /* SBC - RDProtect */ | |
1672 | case SEND_DIAGNOSTIC: /* SPC - SELF-TEST Code */ | |
1673 | case VERIFY: /* SBC - VRProtect */ | |
1674 | case VERIFY_16: /* SBC - VRProtect */ | |
1675 | case WRITE_VERIFY: /* SBC - VRProtect */ | |
1676 | case WRITE_VERIFY_12: /* SBC - VRProtect */ | |
1677 | break; | |
1678 | default: | |
1679 | cdb[1] &= 0x1f; /* clear logical unit number */ | |
1680 | break; | |
1681 | } | |
1682 | } | |
1683 | ||
1684 | static struct se_task * | |
1685 | transport_generic_get_task(struct se_cmd *cmd, | |
1686 | enum dma_data_direction data_direction) | |
1687 | { | |
1688 | struct se_task *task; | |
5951146d | 1689 | struct se_device *dev = cmd->se_dev; |
c66ac9db NB |
1690 | |
1691 | task = dev->transport->alloc_task(cmd); | |
1692 | if (!task) { | |
1693 | printk(KERN_ERR "Unable to allocate struct se_task\n"); | |
1694 | return NULL; | |
1695 | } | |
1696 | ||
1697 | INIT_LIST_HEAD(&task->t_list); | |
1698 | INIT_LIST_HEAD(&task->t_execute_list); | |
1699 | INIT_LIST_HEAD(&task->t_state_list); | |
1700 | init_completion(&task->task_stop_comp); | |
c66ac9db NB |
1701 | task->task_se_cmd = cmd; |
1702 | task->se_dev = dev; | |
1703 | task->task_data_direction = data_direction; | |
1704 | ||
c66ac9db NB |
1705 | return task; |
1706 | } | |
1707 | ||
1708 | static int transport_generic_cmd_sequencer(struct se_cmd *, unsigned char *); | |
1709 | ||
c66ac9db NB |
1710 | /* |
1711 | * Used by fabric modules containing a local struct se_cmd within their | |
1712 | * fabric dependent per I/O descriptor. | |
1713 | */ | |
1714 | void transport_init_se_cmd( | |
1715 | struct se_cmd *cmd, | |
1716 | struct target_core_fabric_ops *tfo, | |
1717 | struct se_session *se_sess, | |
1718 | u32 data_length, | |
1719 | int data_direction, | |
1720 | int task_attr, | |
1721 | unsigned char *sense_buffer) | |
1722 | { | |
5951146d AG |
1723 | INIT_LIST_HEAD(&cmd->se_lun_node); |
1724 | INIT_LIST_HEAD(&cmd->se_delayed_node); | |
1725 | INIT_LIST_HEAD(&cmd->se_ordered_node); | |
07bde79a | 1726 | INIT_LIST_HEAD(&cmd->se_qf_node); |
c66ac9db | 1727 | |
a1d8b49a AG |
1728 | INIT_LIST_HEAD(&cmd->t_task_list); |
1729 | init_completion(&cmd->transport_lun_fe_stop_comp); | |
1730 | init_completion(&cmd->transport_lun_stop_comp); | |
1731 | init_completion(&cmd->t_transport_stop_comp); | |
1732 | spin_lock_init(&cmd->t_state_lock); | |
1733 | atomic_set(&cmd->transport_dev_active, 1); | |
c66ac9db NB |
1734 | |
1735 | cmd->se_tfo = tfo; | |
1736 | cmd->se_sess = se_sess; | |
1737 | cmd->data_length = data_length; | |
1738 | cmd->data_direction = data_direction; | |
1739 | cmd->sam_task_attr = task_attr; | |
1740 | cmd->sense_buffer = sense_buffer; | |
1741 | } | |
1742 | EXPORT_SYMBOL(transport_init_se_cmd); | |
1743 | ||
1744 | static int transport_check_alloc_task_attr(struct se_cmd *cmd) | |
1745 | { | |
1746 | /* | |
1747 | * Check if SAM Task Attribute emulation is enabled for this | |
1748 | * struct se_device storage object | |
1749 | */ | |
5951146d | 1750 | if (cmd->se_dev->dev_task_attr_type != SAM_TASK_ATTR_EMULATED) |
c66ac9db NB |
1751 | return 0; |
1752 | ||
e66ecd50 | 1753 | if (cmd->sam_task_attr == MSG_ACA_TAG) { |
c66ac9db NB |
1754 | DEBUG_STA("SAM Task Attribute ACA" |
1755 | " emulation is not supported\n"); | |
e3d6f909 | 1756 | return -EINVAL; |
c66ac9db NB |
1757 | } |
1758 | /* | |
1759 | * Used to determine when ORDERED commands should go from | |
1760 | * Dormant to Active status. | |
1761 | */ | |
5951146d | 1762 | cmd->se_ordered_id = atomic_inc_return(&cmd->se_dev->dev_ordered_id); |
c66ac9db NB |
1763 | smp_mb__after_atomic_inc(); |
1764 | DEBUG_STA("Allocated se_ordered_id: %u for Task Attr: 0x%02x on %s\n", | |
1765 | cmd->se_ordered_id, cmd->sam_task_attr, | |
1766 | TRANSPORT(cmd->se_dev)->name); | |
1767 | return 0; | |
1768 | } | |
1769 | ||
1770 | void transport_free_se_cmd( | |
1771 | struct se_cmd *se_cmd) | |
1772 | { | |
1773 | if (se_cmd->se_tmr_req) | |
1774 | core_tmr_release_req(se_cmd->se_tmr_req); | |
1775 | /* | |
1776 | * Check and free any extended CDB buffer that was allocated | |
1777 | */ | |
a1d8b49a AG |
1778 | if (se_cmd->t_task_cdb != se_cmd->__t_task_cdb) |
1779 | kfree(se_cmd->t_task_cdb); | |
c66ac9db NB |
1780 | } |
1781 | EXPORT_SYMBOL(transport_free_se_cmd); | |
1782 | ||
1783 | static void transport_generic_wait_for_tasks(struct se_cmd *, int, int); | |
1784 | ||
1785 | /* transport_generic_allocate_tasks(): | |
1786 | * | |
1787 | * Called from fabric RX Thread. | |
1788 | */ | |
1789 | int transport_generic_allocate_tasks( | |
1790 | struct se_cmd *cmd, | |
1791 | unsigned char *cdb) | |
1792 | { | |
1793 | int ret; | |
1794 | ||
1795 | transport_generic_prepare_cdb(cdb); | |
1796 | ||
1797 | /* | |
1798 | * This is needed for early exceptions. | |
1799 | */ | |
1800 | cmd->transport_wait_for_tasks = &transport_generic_wait_for_tasks; | |
1801 | ||
c66ac9db NB |
1802 | /* |
1803 | * Ensure that the received CDB is less than the max (252 + 8) bytes | |
1804 | * for VARIABLE_LENGTH_CMD | |
1805 | */ | |
1806 | if (scsi_command_size(cdb) > SCSI_MAX_VARLEN_CDB_SIZE) { | |
1807 | printk(KERN_ERR "Received SCSI CDB with command_size: %d that" | |
1808 | " exceeds SCSI_MAX_VARLEN_CDB_SIZE: %d\n", | |
1809 | scsi_command_size(cdb), SCSI_MAX_VARLEN_CDB_SIZE); | |
e3d6f909 | 1810 | return -EINVAL; |
c66ac9db NB |
1811 | } |
1812 | /* | |
1813 | * If the received CDB is larger than TCM_MAX_COMMAND_SIZE, | |
1814 | * allocate the additional extended CDB buffer now.. Otherwise | |
1815 | * setup the pointer from __t_task_cdb to t_task_cdb. | |
1816 | */ | |
a1d8b49a AG |
1817 | if (scsi_command_size(cdb) > sizeof(cmd->__t_task_cdb)) { |
1818 | cmd->t_task_cdb = kzalloc(scsi_command_size(cdb), | |
c66ac9db | 1819 | GFP_KERNEL); |
a1d8b49a AG |
1820 | if (!(cmd->t_task_cdb)) { |
1821 | printk(KERN_ERR "Unable to allocate cmd->t_task_cdb" | |
1822 | " %u > sizeof(cmd->__t_task_cdb): %lu ops\n", | |
c66ac9db | 1823 | scsi_command_size(cdb), |
a1d8b49a | 1824 | (unsigned long)sizeof(cmd->__t_task_cdb)); |
e3d6f909 | 1825 | return -ENOMEM; |
c66ac9db NB |
1826 | } |
1827 | } else | |
a1d8b49a | 1828 | cmd->t_task_cdb = &cmd->__t_task_cdb[0]; |
c66ac9db | 1829 | /* |
a1d8b49a | 1830 | * Copy the original CDB into cmd-> |
c66ac9db | 1831 | */ |
a1d8b49a | 1832 | memcpy(cmd->t_task_cdb, cdb, scsi_command_size(cdb)); |
c66ac9db NB |
1833 | /* |
1834 | * Setup the received CDB based on SCSI defined opcodes and | |
1835 | * perform unit attention, persistent reservations and ALUA | |
a1d8b49a | 1836 | * checks for virtual device backends. The cmd->t_task_cdb |
c66ac9db NB |
1837 | * pointer is expected to be setup before we reach this point. |
1838 | */ | |
1839 | ret = transport_generic_cmd_sequencer(cmd, cdb); | |
1840 | if (ret < 0) | |
1841 | return ret; | |
1842 | /* | |
1843 | * Check for SAM Task Attribute Emulation | |
1844 | */ | |
1845 | if (transport_check_alloc_task_attr(cmd) < 0) { | |
1846 | cmd->se_cmd_flags |= SCF_SCSI_CDB_EXCEPTION; | |
1847 | cmd->scsi_sense_reason = TCM_INVALID_CDB_FIELD; | |
5951146d | 1848 | return -EINVAL; |
c66ac9db NB |
1849 | } |
1850 | spin_lock(&cmd->se_lun->lun_sep_lock); | |
1851 | if (cmd->se_lun->lun_sep) | |
1852 | cmd->se_lun->lun_sep->sep_stats.cmd_pdus++; | |
1853 | spin_unlock(&cmd->se_lun->lun_sep_lock); | |
1854 | return 0; | |
1855 | } | |
1856 | EXPORT_SYMBOL(transport_generic_allocate_tasks); | |
1857 | ||
1858 | /* | |
1859 | * Used by fabric module frontends not defining a TFO->new_cmd_map() | |
1860 | * to queue up a newly setup se_cmd w/ TRANSPORT_NEW_CMD statis | |
1861 | */ | |
1862 | int transport_generic_handle_cdb( | |
1863 | struct se_cmd *cmd) | |
1864 | { | |
e3d6f909 | 1865 | if (!cmd->se_lun) { |
c66ac9db | 1866 | dump_stack(); |
e3d6f909 AG |
1867 | printk(KERN_ERR "cmd->se_lun is NULL\n"); |
1868 | return -EINVAL; | |
c66ac9db | 1869 | } |
695434e1 | 1870 | |
c66ac9db NB |
1871 | transport_add_cmd_to_queue(cmd, TRANSPORT_NEW_CMD); |
1872 | return 0; | |
1873 | } | |
1874 | EXPORT_SYMBOL(transport_generic_handle_cdb); | |
1875 | ||
695434e1 NB |
1876 | /* |
1877 | * Used by fabric module frontends to queue tasks directly. | |
1878 | * Many only be used from process context only | |
1879 | */ | |
1880 | int transport_handle_cdb_direct( | |
1881 | struct se_cmd *cmd) | |
1882 | { | |
1883 | if (!cmd->se_lun) { | |
1884 | dump_stack(); | |
1885 | printk(KERN_ERR "cmd->se_lun is NULL\n"); | |
1886 | return -EINVAL; | |
1887 | } | |
1888 | if (in_interrupt()) { | |
1889 | dump_stack(); | |
1890 | printk(KERN_ERR "transport_generic_handle_cdb cannot be called" | |
1891 | " from interrupt context\n"); | |
1892 | return -EINVAL; | |
1893 | } | |
1894 | ||
1895 | return transport_generic_new_cmd(cmd); | |
1896 | } | |
1897 | EXPORT_SYMBOL(transport_handle_cdb_direct); | |
1898 | ||
c66ac9db NB |
1899 | /* |
1900 | * Used by fabric module frontends defining a TFO->new_cmd_map() caller | |
1901 | * to queue up a newly setup se_cmd w/ TRANSPORT_NEW_CMD_MAP in order to | |
1902 | * complete setup in TCM process context w/ TFO->new_cmd_map(). | |
1903 | */ | |
1904 | int transport_generic_handle_cdb_map( | |
1905 | struct se_cmd *cmd) | |
1906 | { | |
e3d6f909 | 1907 | if (!cmd->se_lun) { |
c66ac9db | 1908 | dump_stack(); |
e3d6f909 AG |
1909 | printk(KERN_ERR "cmd->se_lun is NULL\n"); |
1910 | return -EINVAL; | |
c66ac9db NB |
1911 | } |
1912 | ||
1913 | transport_add_cmd_to_queue(cmd, TRANSPORT_NEW_CMD_MAP); | |
1914 | return 0; | |
1915 | } | |
1916 | EXPORT_SYMBOL(transport_generic_handle_cdb_map); | |
1917 | ||
1918 | /* transport_generic_handle_data(): | |
1919 | * | |
1920 | * | |
1921 | */ | |
1922 | int transport_generic_handle_data( | |
1923 | struct se_cmd *cmd) | |
1924 | { | |
1925 | /* | |
1926 | * For the software fabric case, then we assume the nexus is being | |
1927 | * failed/shutdown when signals are pending from the kthread context | |
1928 | * caller, so we return a failure. For the HW target mode case running | |
1929 | * in interrupt code, the signal_pending() check is skipped. | |
1930 | */ | |
1931 | if (!in_interrupt() && signal_pending(current)) | |
e3d6f909 | 1932 | return -EPERM; |
c66ac9db NB |
1933 | /* |
1934 | * If the received CDB has aleady been ABORTED by the generic | |
1935 | * target engine, we now call transport_check_aborted_status() | |
1936 | * to queue any delated TASK_ABORTED status for the received CDB to the | |
25985edc | 1937 | * fabric module as we are expecting no further incoming DATA OUT |
c66ac9db NB |
1938 | * sequences at this point. |
1939 | */ | |
1940 | if (transport_check_aborted_status(cmd, 1) != 0) | |
1941 | return 0; | |
1942 | ||
1943 | transport_add_cmd_to_queue(cmd, TRANSPORT_PROCESS_WRITE); | |
1944 | return 0; | |
1945 | } | |
1946 | EXPORT_SYMBOL(transport_generic_handle_data); | |
1947 | ||
1948 | /* transport_generic_handle_tmr(): | |
1949 | * | |
1950 | * | |
1951 | */ | |
1952 | int transport_generic_handle_tmr( | |
1953 | struct se_cmd *cmd) | |
1954 | { | |
1955 | /* | |
1956 | * This is needed for early exceptions. | |
1957 | */ | |
1958 | cmd->transport_wait_for_tasks = &transport_generic_wait_for_tasks; | |
c66ac9db NB |
1959 | |
1960 | transport_add_cmd_to_queue(cmd, TRANSPORT_PROCESS_TMR); | |
1961 | return 0; | |
1962 | } | |
1963 | EXPORT_SYMBOL(transport_generic_handle_tmr); | |
1964 | ||
f4366772 NB |
1965 | void transport_generic_free_cmd_intr( |
1966 | struct se_cmd *cmd) | |
1967 | { | |
1968 | transport_add_cmd_to_queue(cmd, TRANSPORT_FREE_CMD_INTR); | |
1969 | } | |
1970 | EXPORT_SYMBOL(transport_generic_free_cmd_intr); | |
1971 | ||
c66ac9db NB |
1972 | static int transport_stop_tasks_for_cmd(struct se_cmd *cmd) |
1973 | { | |
1974 | struct se_task *task, *task_tmp; | |
1975 | unsigned long flags; | |
1976 | int ret = 0; | |
1977 | ||
1978 | DEBUG_TS("ITT[0x%08x] - Stopping tasks\n", | |
e3d6f909 | 1979 | cmd->se_tfo->get_task_tag(cmd)); |
c66ac9db NB |
1980 | |
1981 | /* | |
1982 | * No tasks remain in the execution queue | |
1983 | */ | |
a1d8b49a | 1984 | spin_lock_irqsave(&cmd->t_state_lock, flags); |
c66ac9db | 1985 | list_for_each_entry_safe(task, task_tmp, |
a1d8b49a | 1986 | &cmd->t_task_list, t_list) { |
c66ac9db NB |
1987 | DEBUG_TS("task_no[%d] - Processing task %p\n", |
1988 | task->task_no, task); | |
1989 | /* | |
1990 | * If the struct se_task has not been sent and is not active, | |
1991 | * remove the struct se_task from the execution queue. | |
1992 | */ | |
1993 | if (!atomic_read(&task->task_sent) && | |
1994 | !atomic_read(&task->task_active)) { | |
a1d8b49a | 1995 | spin_unlock_irqrestore(&cmd->t_state_lock, |
c66ac9db NB |
1996 | flags); |
1997 | transport_remove_task_from_execute_queue(task, | |
1998 | task->se_dev); | |
1999 | ||
2000 | DEBUG_TS("task_no[%d] - Removed from execute queue\n", | |
2001 | task->task_no); | |
a1d8b49a | 2002 | spin_lock_irqsave(&cmd->t_state_lock, flags); |
c66ac9db NB |
2003 | continue; |
2004 | } | |
2005 | ||
2006 | /* | |
2007 | * If the struct se_task is active, sleep until it is returned | |
2008 | * from the plugin. | |
2009 | */ | |
2010 | if (atomic_read(&task->task_active)) { | |
2011 | atomic_set(&task->task_stop, 1); | |
a1d8b49a | 2012 | spin_unlock_irqrestore(&cmd->t_state_lock, |
c66ac9db NB |
2013 | flags); |
2014 | ||
2015 | DEBUG_TS("task_no[%d] - Waiting to complete\n", | |
2016 | task->task_no); | |
2017 | wait_for_completion(&task->task_stop_comp); | |
2018 | DEBUG_TS("task_no[%d] - Stopped successfully\n", | |
2019 | task->task_no); | |
2020 | ||
a1d8b49a AG |
2021 | spin_lock_irqsave(&cmd->t_state_lock, flags); |
2022 | atomic_dec(&cmd->t_task_cdbs_left); | |
c66ac9db NB |
2023 | |
2024 | atomic_set(&task->task_active, 0); | |
2025 | atomic_set(&task->task_stop, 0); | |
2026 | } else { | |
2027 | DEBUG_TS("task_no[%d] - Did nothing\n", task->task_no); | |
2028 | ret++; | |
2029 | } | |
2030 | ||
2031 | __transport_stop_task_timer(task, &flags); | |
2032 | } | |
a1d8b49a | 2033 | spin_unlock_irqrestore(&cmd->t_state_lock, flags); |
c66ac9db NB |
2034 | |
2035 | return ret; | |
2036 | } | |
2037 | ||
c66ac9db NB |
2038 | /* |
2039 | * Handle SAM-esque emulation for generic transport request failures. | |
2040 | */ | |
2041 | static void transport_generic_request_failure( | |
2042 | struct se_cmd *cmd, | |
2043 | struct se_device *dev, | |
2044 | int complete, | |
2045 | int sc) | |
2046 | { | |
07bde79a NB |
2047 | int ret = 0; |
2048 | ||
c66ac9db | 2049 | DEBUG_GRF("-----[ Storage Engine Exception for cmd: %p ITT: 0x%08x" |
e3d6f909 | 2050 | " CDB: 0x%02x\n", cmd, cmd->se_tfo->get_task_tag(cmd), |
a1d8b49a | 2051 | cmd->t_task_cdb[0]); |
c66ac9db NB |
2052 | DEBUG_GRF("-----[ i_state: %d t_state/def_t_state:" |
2053 | " %d/%d transport_error_status: %d\n", | |
e3d6f909 | 2054 | cmd->se_tfo->get_cmd_state(cmd), |
c66ac9db NB |
2055 | cmd->t_state, cmd->deferred_t_state, |
2056 | cmd->transport_error_status); | |
2057 | DEBUG_GRF("-----[ t_task_cdbs: %d t_task_cdbs_left: %d" | |
2058 | " t_task_cdbs_sent: %d t_task_cdbs_ex_left: %d --" | |
2059 | " t_transport_active: %d t_transport_stop: %d" | |
a1d8b49a AG |
2060 | " t_transport_sent: %d\n", cmd->t_task_cdbs, |
2061 | atomic_read(&cmd->t_task_cdbs_left), | |
2062 | atomic_read(&cmd->t_task_cdbs_sent), | |
2063 | atomic_read(&cmd->t_task_cdbs_ex_left), | |
2064 | atomic_read(&cmd->t_transport_active), | |
2065 | atomic_read(&cmd->t_transport_stop), | |
2066 | atomic_read(&cmd->t_transport_sent)); | |
c66ac9db NB |
2067 | |
2068 | transport_stop_all_task_timers(cmd); | |
2069 | ||
2070 | if (dev) | |
e3d6f909 | 2071 | atomic_inc(&dev->depth_left); |
c66ac9db NB |
2072 | /* |
2073 | * For SAM Task Attribute emulation for failed struct se_cmd | |
2074 | */ | |
2075 | if (cmd->se_dev->dev_task_attr_type == SAM_TASK_ATTR_EMULATED) | |
2076 | transport_complete_task_attr(cmd); | |
2077 | ||
2078 | if (complete) { | |
2079 | transport_direct_request_timeout(cmd); | |
2080 | cmd->transport_error_status = PYX_TRANSPORT_LU_COMM_FAILURE; | |
2081 | } | |
2082 | ||
2083 | switch (cmd->transport_error_status) { | |
2084 | case PYX_TRANSPORT_UNKNOWN_SAM_OPCODE: | |
2085 | cmd->scsi_sense_reason = TCM_UNSUPPORTED_SCSI_OPCODE; | |
2086 | break; | |
2087 | case PYX_TRANSPORT_REQ_TOO_MANY_SECTORS: | |
2088 | cmd->scsi_sense_reason = TCM_SECTOR_COUNT_TOO_MANY; | |
2089 | break; | |
2090 | case PYX_TRANSPORT_INVALID_CDB_FIELD: | |
2091 | cmd->scsi_sense_reason = TCM_INVALID_CDB_FIELD; | |
2092 | break; | |
2093 | case PYX_TRANSPORT_INVALID_PARAMETER_LIST: | |
2094 | cmd->scsi_sense_reason = TCM_INVALID_PARAMETER_LIST; | |
2095 | break; | |
2096 | case PYX_TRANSPORT_OUT_OF_MEMORY_RESOURCES: | |
2097 | if (!sc) | |
2098 | transport_new_cmd_failure(cmd); | |
2099 | /* | |
2100 | * Currently for PYX_TRANSPORT_OUT_OF_MEMORY_RESOURCES, | |
2101 | * we force this session to fall back to session | |
2102 | * recovery. | |
2103 | */ | |
e3d6f909 AG |
2104 | cmd->se_tfo->fall_back_to_erl0(cmd->se_sess); |
2105 | cmd->se_tfo->stop_session(cmd->se_sess, 0, 0); | |
c66ac9db NB |
2106 | |
2107 | goto check_stop; | |
2108 | case PYX_TRANSPORT_LU_COMM_FAILURE: | |
2109 | case PYX_TRANSPORT_ILLEGAL_REQUEST: | |
2110 | cmd->scsi_sense_reason = TCM_LOGICAL_UNIT_COMMUNICATION_FAILURE; | |
2111 | break; | |
2112 | case PYX_TRANSPORT_UNKNOWN_MODE_PAGE: | |
2113 | cmd->scsi_sense_reason = TCM_UNKNOWN_MODE_PAGE; | |
2114 | break; | |
2115 | case PYX_TRANSPORT_WRITE_PROTECTED: | |
2116 | cmd->scsi_sense_reason = TCM_WRITE_PROTECTED; | |
2117 | break; | |
2118 | case PYX_TRANSPORT_RESERVATION_CONFLICT: | |
2119 | /* | |
2120 | * No SENSE Data payload for this case, set SCSI Status | |
2121 | * and queue the response to $FABRIC_MOD. | |
2122 | * | |
2123 | * Uses linux/include/scsi/scsi.h SAM status codes defs | |
2124 | */ | |
2125 | cmd->scsi_status = SAM_STAT_RESERVATION_CONFLICT; | |
2126 | /* | |
2127 | * For UA Interlock Code 11b, a RESERVATION CONFLICT will | |
2128 | * establish a UNIT ATTENTION with PREVIOUS RESERVATION | |
2129 | * CONFLICT STATUS. | |
2130 | * | |
2131 | * See spc4r17, section 7.4.6 Control Mode Page, Table 349 | |
2132 | */ | |
e3d6f909 AG |
2133 | if (cmd->se_sess && |
2134 | cmd->se_dev->se_sub_dev->se_dev_attrib.emulate_ua_intlck_ctrl == 2) | |
2135 | core_scsi3_ua_allocate(cmd->se_sess->se_node_acl, | |
c66ac9db NB |
2136 | cmd->orig_fe_lun, 0x2C, |
2137 | ASCQ_2CH_PREVIOUS_RESERVATION_CONFLICT_STATUS); | |
2138 | ||
07bde79a NB |
2139 | ret = cmd->se_tfo->queue_status(cmd); |
2140 | if (ret == -EAGAIN) | |
2141 | goto queue_full; | |
c66ac9db NB |
2142 | goto check_stop; |
2143 | case PYX_TRANSPORT_USE_SENSE_REASON: | |
2144 | /* | |
2145 | * struct se_cmd->scsi_sense_reason already set | |
2146 | */ | |
2147 | break; | |
2148 | default: | |
2149 | printk(KERN_ERR "Unknown transport error for CDB 0x%02x: %d\n", | |
a1d8b49a | 2150 | cmd->t_task_cdb[0], |
c66ac9db NB |
2151 | cmd->transport_error_status); |
2152 | cmd->scsi_sense_reason = TCM_UNSUPPORTED_SCSI_OPCODE; | |
2153 | break; | |
2154 | } | |
2155 | ||
2156 | if (!sc) | |
2157 | transport_new_cmd_failure(cmd); | |
07bde79a NB |
2158 | else { |
2159 | ret = transport_send_check_condition_and_sense(cmd, | |
2160 | cmd->scsi_sense_reason, 0); | |
2161 | if (ret == -EAGAIN) | |
2162 | goto queue_full; | |
2163 | } | |
2164 | ||
c66ac9db NB |
2165 | check_stop: |
2166 | transport_lun_remove_cmd(cmd); | |
2167 | if (!(transport_cmd_check_stop_to_fabric(cmd))) | |
2168 | ; | |
07bde79a NB |
2169 | return; |
2170 | ||
2171 | queue_full: | |
2172 | cmd->t_state = TRANSPORT_COMPLETE_OK; | |
2173 | transport_handle_queue_full(cmd, cmd->se_dev, transport_complete_qf); | |
c66ac9db NB |
2174 | } |
2175 | ||
2176 | static void transport_direct_request_timeout(struct se_cmd *cmd) | |
2177 | { | |
2178 | unsigned long flags; | |
2179 | ||
a1d8b49a AG |
2180 | spin_lock_irqsave(&cmd->t_state_lock, flags); |
2181 | if (!(atomic_read(&cmd->t_transport_timeout))) { | |
2182 | spin_unlock_irqrestore(&cmd->t_state_lock, flags); | |
c66ac9db NB |
2183 | return; |
2184 | } | |
a1d8b49a AG |
2185 | if (atomic_read(&cmd->t_task_cdbs_timeout_left)) { |
2186 | spin_unlock_irqrestore(&cmd->t_state_lock, flags); | |
c66ac9db NB |
2187 | return; |
2188 | } | |
2189 | ||
a1d8b49a AG |
2190 | atomic_sub(atomic_read(&cmd->t_transport_timeout), |
2191 | &cmd->t_se_count); | |
2192 | spin_unlock_irqrestore(&cmd->t_state_lock, flags); | |
c66ac9db NB |
2193 | } |
2194 | ||
2195 | static void transport_generic_request_timeout(struct se_cmd *cmd) | |
2196 | { | |
2197 | unsigned long flags; | |
2198 | ||
2199 | /* | |
a1d8b49a | 2200 | * Reset cmd->t_se_count to allow transport_generic_remove() |
c66ac9db NB |
2201 | * to allow last call to free memory resources. |
2202 | */ | |
a1d8b49a AG |
2203 | spin_lock_irqsave(&cmd->t_state_lock, flags); |
2204 | if (atomic_read(&cmd->t_transport_timeout) > 1) { | |
2205 | int tmp = (atomic_read(&cmd->t_transport_timeout) - 1); | |
c66ac9db | 2206 | |
a1d8b49a | 2207 | atomic_sub(tmp, &cmd->t_se_count); |
c66ac9db | 2208 | } |
a1d8b49a | 2209 | spin_unlock_irqrestore(&cmd->t_state_lock, flags); |
c66ac9db | 2210 | |
35462975 | 2211 | transport_generic_remove(cmd, 0); |
c66ac9db NB |
2212 | } |
2213 | ||
c66ac9db NB |
2214 | static inline u32 transport_lba_21(unsigned char *cdb) |
2215 | { | |
2216 | return ((cdb[1] & 0x1f) << 16) | (cdb[2] << 8) | cdb[3]; | |
2217 | } | |
2218 | ||
2219 | static inline u32 transport_lba_32(unsigned char *cdb) | |
2220 | { | |
2221 | return (cdb[2] << 24) | (cdb[3] << 16) | (cdb[4] << 8) | cdb[5]; | |
2222 | } | |
2223 | ||
2224 | static inline unsigned long long transport_lba_64(unsigned char *cdb) | |
2225 | { | |
2226 | unsigned int __v1, __v2; | |
2227 | ||
2228 | __v1 = (cdb[2] << 24) | (cdb[3] << 16) | (cdb[4] << 8) | cdb[5]; | |
2229 | __v2 = (cdb[6] << 24) | (cdb[7] << 16) | (cdb[8] << 8) | cdb[9]; | |
2230 | ||
2231 | return ((unsigned long long)__v2) | (unsigned long long)__v1 << 32; | |
2232 | } | |
2233 | ||
2234 | /* | |
2235 | * For VARIABLE_LENGTH_CDB w/ 32 byte extended CDBs | |
2236 | */ | |
2237 | static inline unsigned long long transport_lba_64_ext(unsigned char *cdb) | |
2238 | { | |
2239 | unsigned int __v1, __v2; | |
2240 | ||
2241 | __v1 = (cdb[12] << 24) | (cdb[13] << 16) | (cdb[14] << 8) | cdb[15]; | |
2242 | __v2 = (cdb[16] << 24) | (cdb[17] << 16) | (cdb[18] << 8) | cdb[19]; | |
2243 | ||
2244 | return ((unsigned long long)__v2) | (unsigned long long)__v1 << 32; | |
2245 | } | |
2246 | ||
2247 | static void transport_set_supported_SAM_opcode(struct se_cmd *se_cmd) | |
2248 | { | |
2249 | unsigned long flags; | |
2250 | ||
a1d8b49a | 2251 | spin_lock_irqsave(&se_cmd->t_state_lock, flags); |
c66ac9db | 2252 | se_cmd->se_cmd_flags |= SCF_SUPPORTED_SAM_OPCODE; |
a1d8b49a | 2253 | spin_unlock_irqrestore(&se_cmd->t_state_lock, flags); |
c66ac9db NB |
2254 | } |
2255 | ||
2256 | /* | |
2257 | * Called from interrupt context. | |
2258 | */ | |
2259 | static void transport_task_timeout_handler(unsigned long data) | |
2260 | { | |
2261 | struct se_task *task = (struct se_task *)data; | |
e3d6f909 | 2262 | struct se_cmd *cmd = task->task_se_cmd; |
c66ac9db NB |
2263 | unsigned long flags; |
2264 | ||
2265 | DEBUG_TT("transport task timeout fired! task: %p cmd: %p\n", task, cmd); | |
2266 | ||
a1d8b49a | 2267 | spin_lock_irqsave(&cmd->t_state_lock, flags); |
c66ac9db | 2268 | if (task->task_flags & TF_STOP) { |
a1d8b49a | 2269 | spin_unlock_irqrestore(&cmd->t_state_lock, flags); |
c66ac9db NB |
2270 | return; |
2271 | } | |
2272 | task->task_flags &= ~TF_RUNNING; | |
2273 | ||
2274 | /* | |
2275 | * Determine if transport_complete_task() has already been called. | |
2276 | */ | |
2277 | if (!(atomic_read(&task->task_active))) { | |
2278 | DEBUG_TT("transport task: %p cmd: %p timeout task_active" | |
2279 | " == 0\n", task, cmd); | |
a1d8b49a | 2280 | spin_unlock_irqrestore(&cmd->t_state_lock, flags); |
c66ac9db NB |
2281 | return; |
2282 | } | |
2283 | ||
a1d8b49a AG |
2284 | atomic_inc(&cmd->t_se_count); |
2285 | atomic_inc(&cmd->t_transport_timeout); | |
2286 | cmd->t_tasks_failed = 1; | |
c66ac9db NB |
2287 | |
2288 | atomic_set(&task->task_timeout, 1); | |
2289 | task->task_error_status = PYX_TRANSPORT_TASK_TIMEOUT; | |
2290 | task->task_scsi_status = 1; | |
2291 | ||
2292 | if (atomic_read(&task->task_stop)) { | |
2293 | DEBUG_TT("transport task: %p cmd: %p timeout task_stop" | |
2294 | " == 1\n", task, cmd); | |
a1d8b49a | 2295 | spin_unlock_irqrestore(&cmd->t_state_lock, flags); |
c66ac9db NB |
2296 | complete(&task->task_stop_comp); |
2297 | return; | |
2298 | } | |
2299 | ||
a1d8b49a | 2300 | if (!(atomic_dec_and_test(&cmd->t_task_cdbs_left))) { |
c66ac9db NB |
2301 | DEBUG_TT("transport task: %p cmd: %p timeout non zero" |
2302 | " t_task_cdbs_left\n", task, cmd); | |
a1d8b49a | 2303 | spin_unlock_irqrestore(&cmd->t_state_lock, flags); |
c66ac9db NB |
2304 | return; |
2305 | } | |
2306 | DEBUG_TT("transport task: %p cmd: %p timeout ZERO t_task_cdbs_left\n", | |
2307 | task, cmd); | |
2308 | ||
2309 | cmd->t_state = TRANSPORT_COMPLETE_FAILURE; | |
a1d8b49a | 2310 | spin_unlock_irqrestore(&cmd->t_state_lock, flags); |
c66ac9db NB |
2311 | |
2312 | transport_add_cmd_to_queue(cmd, TRANSPORT_COMPLETE_FAILURE); | |
2313 | } | |
2314 | ||
2315 | /* | |
a1d8b49a | 2316 | * Called with cmd->t_state_lock held. |
c66ac9db NB |
2317 | */ |
2318 | static void transport_start_task_timer(struct se_task *task) | |
2319 | { | |
2320 | struct se_device *dev = task->se_dev; | |
2321 | int timeout; | |
2322 | ||
2323 | if (task->task_flags & TF_RUNNING) | |
2324 | return; | |
2325 | /* | |
2326 | * If the task_timeout is disabled, exit now. | |
2327 | */ | |
e3d6f909 | 2328 | timeout = dev->se_sub_dev->se_dev_attrib.task_timeout; |
c66ac9db NB |
2329 | if (!(timeout)) |
2330 | return; | |
2331 | ||
2332 | init_timer(&task->task_timer); | |
2333 | task->task_timer.expires = (get_jiffies_64() + timeout * HZ); | |
2334 | task->task_timer.data = (unsigned long) task; | |
2335 | task->task_timer.function = transport_task_timeout_handler; | |
2336 | ||
2337 | task->task_flags |= TF_RUNNING; | |
2338 | add_timer(&task->task_timer); | |
2339 | #if 0 | |
2340 | printk(KERN_INFO "Starting task timer for cmd: %p task: %p seconds:" | |
2341 | " %d\n", task->task_se_cmd, task, timeout); | |
2342 | #endif | |
2343 | } | |
2344 | ||
2345 | /* | |
a1d8b49a | 2346 | * Called with spin_lock_irq(&cmd->t_state_lock) held. |
c66ac9db NB |
2347 | */ |
2348 | void __transport_stop_task_timer(struct se_task *task, unsigned long *flags) | |
2349 | { | |
e3d6f909 | 2350 | struct se_cmd *cmd = task->task_se_cmd; |
c66ac9db NB |
2351 | |
2352 | if (!(task->task_flags & TF_RUNNING)) | |
2353 | return; | |
2354 | ||
2355 | task->task_flags |= TF_STOP; | |
a1d8b49a | 2356 | spin_unlock_irqrestore(&cmd->t_state_lock, *flags); |
c66ac9db NB |
2357 | |
2358 | del_timer_sync(&task->task_timer); | |
2359 | ||
a1d8b49a | 2360 | spin_lock_irqsave(&cmd->t_state_lock, *flags); |
c66ac9db NB |
2361 | task->task_flags &= ~TF_RUNNING; |
2362 | task->task_flags &= ~TF_STOP; | |
2363 | } | |
2364 | ||
2365 | static void transport_stop_all_task_timers(struct se_cmd *cmd) | |
2366 | { | |
2367 | struct se_task *task = NULL, *task_tmp; | |
2368 | unsigned long flags; | |
2369 | ||
a1d8b49a | 2370 | spin_lock_irqsave(&cmd->t_state_lock, flags); |
c66ac9db | 2371 | list_for_each_entry_safe(task, task_tmp, |
a1d8b49a | 2372 | &cmd->t_task_list, t_list) |
c66ac9db | 2373 | __transport_stop_task_timer(task, &flags); |
a1d8b49a | 2374 | spin_unlock_irqrestore(&cmd->t_state_lock, flags); |
c66ac9db NB |
2375 | } |
2376 | ||
2377 | static inline int transport_tcq_window_closed(struct se_device *dev) | |
2378 | { | |
2379 | if (dev->dev_tcq_window_closed++ < | |
2380 | PYX_TRANSPORT_WINDOW_CLOSED_THRESHOLD) { | |
2381 | msleep(PYX_TRANSPORT_WINDOW_CLOSED_WAIT_SHORT); | |
2382 | } else | |
2383 | msleep(PYX_TRANSPORT_WINDOW_CLOSED_WAIT_LONG); | |
2384 | ||
e3d6f909 | 2385 | wake_up_interruptible(&dev->dev_queue_obj.thread_wq); |
c66ac9db NB |
2386 | return 0; |
2387 | } | |
2388 | ||
2389 | /* | |
2390 | * Called from Fabric Module context from transport_execute_tasks() | |
2391 | * | |
2392 | * The return of this function determins if the tasks from struct se_cmd | |
2393 | * get added to the execution queue in transport_execute_tasks(), | |
2394 | * or are added to the delayed or ordered lists here. | |
2395 | */ | |
2396 | static inline int transport_execute_task_attr(struct se_cmd *cmd) | |
2397 | { | |
5951146d | 2398 | if (cmd->se_dev->dev_task_attr_type != SAM_TASK_ATTR_EMULATED) |
c66ac9db NB |
2399 | return 1; |
2400 | /* | |
25985edc | 2401 | * Check for the existence of HEAD_OF_QUEUE, and if true return 1 |
c66ac9db NB |
2402 | * to allow the passed struct se_cmd list of tasks to the front of the list. |
2403 | */ | |
e66ecd50 | 2404 | if (cmd->sam_task_attr == MSG_HEAD_TAG) { |
5951146d | 2405 | atomic_inc(&cmd->se_dev->dev_hoq_count); |
c66ac9db NB |
2406 | smp_mb__after_atomic_inc(); |
2407 | DEBUG_STA("Added HEAD_OF_QUEUE for CDB:" | |
2408 | " 0x%02x, se_ordered_id: %u\n", | |
a1d8b49a | 2409 | cmd->_task_cdb[0], |
c66ac9db NB |
2410 | cmd->se_ordered_id); |
2411 | return 1; | |
e66ecd50 | 2412 | } else if (cmd->sam_task_attr == MSG_ORDERED_TAG) { |
5951146d AG |
2413 | spin_lock(&cmd->se_dev->ordered_cmd_lock); |
2414 | list_add_tail(&cmd->se_ordered_node, | |
2415 | &cmd->se_dev->ordered_cmd_list); | |
2416 | spin_unlock(&cmd->se_dev->ordered_cmd_lock); | |
c66ac9db | 2417 | |
5951146d | 2418 | atomic_inc(&cmd->se_dev->dev_ordered_sync); |
c66ac9db NB |
2419 | smp_mb__after_atomic_inc(); |
2420 | ||
2421 | DEBUG_STA("Added ORDERED for CDB: 0x%02x to ordered" | |
2422 | " list, se_ordered_id: %u\n", | |
a1d8b49a | 2423 | cmd->t_task_cdb[0], |
c66ac9db NB |
2424 | cmd->se_ordered_id); |
2425 | /* | |
2426 | * Add ORDERED command to tail of execution queue if | |
2427 | * no other older commands exist that need to be | |
2428 | * completed first. | |
2429 | */ | |
5951146d | 2430 | if (!(atomic_read(&cmd->se_dev->simple_cmds))) |
c66ac9db NB |
2431 | return 1; |
2432 | } else { | |
2433 | /* | |
2434 | * For SIMPLE and UNTAGGED Task Attribute commands | |
2435 | */ | |
5951146d | 2436 | atomic_inc(&cmd->se_dev->simple_cmds); |
c66ac9db NB |
2437 | smp_mb__after_atomic_inc(); |
2438 | } | |
2439 | /* | |
2440 | * Otherwise if one or more outstanding ORDERED task attribute exist, | |
2441 | * add the dormant task(s) built for the passed struct se_cmd to the | |
2442 | * execution queue and become in Active state for this struct se_device. | |
2443 | */ | |
5951146d | 2444 | if (atomic_read(&cmd->se_dev->dev_ordered_sync) != 0) { |
c66ac9db NB |
2445 | /* |
2446 | * Otherwise, add cmd w/ tasks to delayed cmd queue that | |
25985edc | 2447 | * will be drained upon completion of HEAD_OF_QUEUE task. |
c66ac9db | 2448 | */ |
5951146d | 2449 | spin_lock(&cmd->se_dev->delayed_cmd_lock); |
c66ac9db | 2450 | cmd->se_cmd_flags |= SCF_DELAYED_CMD_FROM_SAM_ATTR; |
5951146d AG |
2451 | list_add_tail(&cmd->se_delayed_node, |
2452 | &cmd->se_dev->delayed_cmd_list); | |
2453 | spin_unlock(&cmd->se_dev->delayed_cmd_lock); | |
c66ac9db NB |
2454 | |
2455 | DEBUG_STA("Added CDB: 0x%02x Task Attr: 0x%02x to" | |
2456 | " delayed CMD list, se_ordered_id: %u\n", | |
a1d8b49a | 2457 | cmd->t_task_cdb[0], cmd->sam_task_attr, |
c66ac9db NB |
2458 | cmd->se_ordered_id); |
2459 | /* | |
2460 | * Return zero to let transport_execute_tasks() know | |
2461 | * not to add the delayed tasks to the execution list. | |
2462 | */ | |
2463 | return 0; | |
2464 | } | |
2465 | /* | |
2466 | * Otherwise, no ORDERED task attributes exist.. | |
2467 | */ | |
2468 | return 1; | |
2469 | } | |
2470 | ||
2471 | /* | |
2472 | * Called from fabric module context in transport_generic_new_cmd() and | |
2473 | * transport_generic_process_write() | |
2474 | */ | |
2475 | static int transport_execute_tasks(struct se_cmd *cmd) | |
2476 | { | |
2477 | int add_tasks; | |
2478 | ||
db1620a2 CH |
2479 | if (se_dev_check_online(cmd->se_orig_obj_ptr) != 0) { |
2480 | cmd->transport_error_status = PYX_TRANSPORT_LU_COMM_FAILURE; | |
2481 | transport_generic_request_failure(cmd, NULL, 0, 1); | |
2482 | return 0; | |
c66ac9db | 2483 | } |
db1620a2 | 2484 | |
c66ac9db NB |
2485 | /* |
2486 | * Call transport_cmd_check_stop() to see if a fabric exception | |
25985edc | 2487 | * has occurred that prevents execution. |
c66ac9db NB |
2488 | */ |
2489 | if (!(transport_cmd_check_stop(cmd, 0, TRANSPORT_PROCESSING))) { | |
2490 | /* | |
2491 | * Check for SAM Task Attribute emulation and HEAD_OF_QUEUE | |
2492 | * attribute for the tasks of the received struct se_cmd CDB | |
2493 | */ | |
2494 | add_tasks = transport_execute_task_attr(cmd); | |
e3d6f909 | 2495 | if (!add_tasks) |
c66ac9db NB |
2496 | goto execute_tasks; |
2497 | /* | |
2498 | * This calls transport_add_tasks_from_cmd() to handle | |
2499 | * HEAD_OF_QUEUE ordering for SAM Task Attribute emulation | |
2500 | * (if enabled) in __transport_add_task_to_execute_queue() and | |
2501 | * transport_add_task_check_sam_attr(). | |
2502 | */ | |
2503 | transport_add_tasks_from_cmd(cmd); | |
2504 | } | |
2505 | /* | |
2506 | * Kick the execution queue for the cmd associated struct se_device | |
2507 | * storage object. | |
2508 | */ | |
2509 | execute_tasks: | |
5951146d | 2510 | __transport_execute_tasks(cmd->se_dev); |
c66ac9db NB |
2511 | return 0; |
2512 | } | |
2513 | ||
2514 | /* | |
2515 | * Called to check struct se_device tcq depth window, and once open pull struct se_task | |
2516 | * from struct se_device->execute_task_list and | |
2517 | * | |
2518 | * Called from transport_processing_thread() | |
2519 | */ | |
2520 | static int __transport_execute_tasks(struct se_device *dev) | |
2521 | { | |
2522 | int error; | |
2523 | struct se_cmd *cmd = NULL; | |
e3d6f909 | 2524 | struct se_task *task = NULL; |
c66ac9db NB |
2525 | unsigned long flags; |
2526 | ||
2527 | /* | |
2528 | * Check if there is enough room in the device and HBA queue to send | |
a1d8b49a | 2529 | * struct se_tasks to the selected transport. |
c66ac9db NB |
2530 | */ |
2531 | check_depth: | |
e3d6f909 | 2532 | if (!atomic_read(&dev->depth_left)) |
c66ac9db | 2533 | return transport_tcq_window_closed(dev); |
c66ac9db | 2534 | |
e3d6f909 | 2535 | dev->dev_tcq_window_closed = 0; |
c66ac9db | 2536 | |
e3d6f909 AG |
2537 | spin_lock_irq(&dev->execute_task_lock); |
2538 | if (list_empty(&dev->execute_task_list)) { | |
2539 | spin_unlock_irq(&dev->execute_task_lock); | |
c66ac9db NB |
2540 | return 0; |
2541 | } | |
e3d6f909 AG |
2542 | task = list_first_entry(&dev->execute_task_list, |
2543 | struct se_task, t_execute_list); | |
2544 | list_del(&task->t_execute_list); | |
2545 | atomic_set(&task->task_execute_queue, 0); | |
2546 | atomic_dec(&dev->execute_tasks); | |
2547 | spin_unlock_irq(&dev->execute_task_lock); | |
c66ac9db NB |
2548 | |
2549 | atomic_dec(&dev->depth_left); | |
c66ac9db | 2550 | |
e3d6f909 | 2551 | cmd = task->task_se_cmd; |
c66ac9db | 2552 | |
a1d8b49a | 2553 | spin_lock_irqsave(&cmd->t_state_lock, flags); |
c66ac9db NB |
2554 | atomic_set(&task->task_active, 1); |
2555 | atomic_set(&task->task_sent, 1); | |
a1d8b49a | 2556 | atomic_inc(&cmd->t_task_cdbs_sent); |
c66ac9db | 2557 | |
a1d8b49a AG |
2558 | if (atomic_read(&cmd->t_task_cdbs_sent) == |
2559 | cmd->t_task_list_num) | |
c66ac9db NB |
2560 | atomic_set(&cmd->transport_sent, 1); |
2561 | ||
2562 | transport_start_task_timer(task); | |
a1d8b49a | 2563 | spin_unlock_irqrestore(&cmd->t_state_lock, flags); |
c66ac9db NB |
2564 | /* |
2565 | * The struct se_cmd->transport_emulate_cdb() function pointer is used | |
e3d6f909 | 2566 | * to grab REPORT_LUNS and other CDBs we want to handle before they hit the |
c66ac9db NB |
2567 | * struct se_subsystem_api->do_task() caller below. |
2568 | */ | |
2569 | if (cmd->transport_emulate_cdb) { | |
2570 | error = cmd->transport_emulate_cdb(cmd); | |
2571 | if (error != 0) { | |
2572 | cmd->transport_error_status = error; | |
2573 | atomic_set(&task->task_active, 0); | |
2574 | atomic_set(&cmd->transport_sent, 0); | |
2575 | transport_stop_tasks_for_cmd(cmd); | |
2576 | transport_generic_request_failure(cmd, dev, 0, 1); | |
2577 | goto check_depth; | |
2578 | } | |
2579 | /* | |
2580 | * Handle the successful completion for transport_emulate_cdb() | |
2581 | * for synchronous operation, following SCF_EMULATE_CDB_ASYNC | |
2582 | * Otherwise the caller is expected to complete the task with | |
2583 | * proper status. | |
2584 | */ | |
2585 | if (!(cmd->se_cmd_flags & SCF_EMULATE_CDB_ASYNC)) { | |
2586 | cmd->scsi_status = SAM_STAT_GOOD; | |
2587 | task->task_scsi_status = GOOD; | |
2588 | transport_complete_task(task, 1); | |
2589 | } | |
2590 | } else { | |
2591 | /* | |
2592 | * Currently for all virtual TCM plugins including IBLOCK, FILEIO and | |
2593 | * RAMDISK we use the internal transport_emulate_control_cdb() logic | |
2594 | * with struct se_subsystem_api callers for the primary SPC-3 TYPE_DISK | |
2595 | * LUN emulation code. | |
2596 | * | |
2597 | * For TCM/pSCSI and all other SCF_SCSI_DATA_SG_IO_CDB I/O tasks we | |
2598 | * call ->do_task() directly and let the underlying TCM subsystem plugin | |
2599 | * code handle the CDB emulation. | |
2600 | */ | |
e3d6f909 AG |
2601 | if ((dev->transport->transport_type != TRANSPORT_PLUGIN_PHBA_PDEV) && |
2602 | (!(task->task_se_cmd->se_cmd_flags & SCF_SCSI_DATA_SG_IO_CDB))) | |
c66ac9db NB |
2603 | error = transport_emulate_control_cdb(task); |
2604 | else | |
e3d6f909 | 2605 | error = dev->transport->do_task(task); |
c66ac9db NB |
2606 | |
2607 | if (error != 0) { | |
2608 | cmd->transport_error_status = error; | |
2609 | atomic_set(&task->task_active, 0); | |
2610 | atomic_set(&cmd->transport_sent, 0); | |
2611 | transport_stop_tasks_for_cmd(cmd); | |
2612 | transport_generic_request_failure(cmd, dev, 0, 1); | |
2613 | } | |
2614 | } | |
2615 | ||
2616 | goto check_depth; | |
2617 | ||
2618 | return 0; | |
2619 | } | |
2620 | ||
2621 | void transport_new_cmd_failure(struct se_cmd *se_cmd) | |
2622 | { | |
2623 | unsigned long flags; | |
2624 | /* | |
2625 | * Any unsolicited data will get dumped for failed command inside of | |
2626 | * the fabric plugin | |
2627 | */ | |
a1d8b49a | 2628 | spin_lock_irqsave(&se_cmd->t_state_lock, flags); |
c66ac9db NB |
2629 | se_cmd->se_cmd_flags |= SCF_SE_CMD_FAILED; |
2630 | se_cmd->se_cmd_flags |= SCF_SCSI_CDB_EXCEPTION; | |
a1d8b49a | 2631 | spin_unlock_irqrestore(&se_cmd->t_state_lock, flags); |
c66ac9db NB |
2632 | } |
2633 | ||
2634 | static void transport_nop_wait_for_tasks(struct se_cmd *, int, int); | |
2635 | ||
2636 | static inline u32 transport_get_sectors_6( | |
2637 | unsigned char *cdb, | |
2638 | struct se_cmd *cmd, | |
2639 | int *ret) | |
2640 | { | |
5951146d | 2641 | struct se_device *dev = cmd->se_dev; |
c66ac9db NB |
2642 | |
2643 | /* | |
2644 | * Assume TYPE_DISK for non struct se_device objects. | |
2645 | * Use 8-bit sector value. | |
2646 | */ | |
2647 | if (!dev) | |
2648 | goto type_disk; | |
2649 | ||
2650 | /* | |
2651 | * Use 24-bit allocation length for TYPE_TAPE. | |
2652 | */ | |
e3d6f909 | 2653 | if (dev->transport->get_device_type(dev) == TYPE_TAPE) |
c66ac9db NB |
2654 | return (u32)(cdb[2] << 16) + (cdb[3] << 8) + cdb[4]; |
2655 | ||
2656 | /* | |
2657 | * Everything else assume TYPE_DISK Sector CDB location. | |
2658 | * Use 8-bit sector value. | |
2659 | */ | |
2660 | type_disk: | |
2661 | return (u32)cdb[4]; | |
2662 | } | |
2663 | ||
2664 | static inline u32 transport_get_sectors_10( | |
2665 | unsigned char *cdb, | |
2666 | struct se_cmd *cmd, | |
2667 | int *ret) | |
2668 | { | |
5951146d | 2669 | struct se_device *dev = cmd->se_dev; |
c66ac9db NB |
2670 | |
2671 | /* | |
2672 | * Assume TYPE_DISK for non struct se_device objects. | |
2673 | * Use 16-bit sector value. | |
2674 | */ | |
2675 | if (!dev) | |
2676 | goto type_disk; | |
2677 | ||
2678 | /* | |
2679 | * XXX_10 is not defined in SSC, throw an exception | |
2680 | */ | |
e3d6f909 AG |
2681 | if (dev->transport->get_device_type(dev) == TYPE_TAPE) { |
2682 | *ret = -EINVAL; | |
c66ac9db NB |
2683 | return 0; |
2684 | } | |
2685 | ||
2686 | /* | |
2687 | * Everything else assume TYPE_DISK Sector CDB location. | |
2688 | * Use 16-bit sector value. | |
2689 | */ | |
2690 | type_disk: | |
2691 | return (u32)(cdb[7] << 8) + cdb[8]; | |
2692 | } | |
2693 | ||
2694 | static inline u32 transport_get_sectors_12( | |
2695 | unsigned char *cdb, | |
2696 | struct se_cmd *cmd, | |
2697 | int *ret) | |
2698 | { | |
5951146d | 2699 | struct se_device *dev = cmd->se_dev; |
c66ac9db NB |
2700 | |
2701 | /* | |
2702 | * Assume TYPE_DISK for non struct se_device objects. | |
2703 | * Use 32-bit sector value. | |
2704 | */ | |
2705 | if (!dev) | |
2706 | goto type_disk; | |
2707 | ||
2708 | /* | |
2709 | * XXX_12 is not defined in SSC, throw an exception | |
2710 | */ | |
e3d6f909 AG |
2711 | if (dev->transport->get_device_type(dev) == TYPE_TAPE) { |
2712 | *ret = -EINVAL; | |
c66ac9db NB |
2713 | return 0; |
2714 | } | |
2715 | ||
2716 | /* | |
2717 | * Everything else assume TYPE_DISK Sector CDB location. | |
2718 | * Use 32-bit sector value. | |
2719 | */ | |
2720 | type_disk: | |
2721 | return (u32)(cdb[6] << 24) + (cdb[7] << 16) + (cdb[8] << 8) + cdb[9]; | |
2722 | } | |
2723 | ||
2724 | static inline u32 transport_get_sectors_16( | |
2725 | unsigned char *cdb, | |
2726 | struct se_cmd *cmd, | |
2727 | int *ret) | |
2728 | { | |
5951146d | 2729 | struct se_device *dev = cmd->se_dev; |
c66ac9db NB |
2730 | |
2731 | /* | |
2732 | * Assume TYPE_DISK for non struct se_device objects. | |
2733 | * Use 32-bit sector value. | |
2734 | */ | |
2735 | if (!dev) | |
2736 | goto type_disk; | |
2737 | ||
2738 | /* | |
2739 | * Use 24-bit allocation length for TYPE_TAPE. | |
2740 | */ | |
e3d6f909 | 2741 | if (dev->transport->get_device_type(dev) == TYPE_TAPE) |
c66ac9db NB |
2742 | return (u32)(cdb[12] << 16) + (cdb[13] << 8) + cdb[14]; |
2743 | ||
2744 | type_disk: | |
2745 | return (u32)(cdb[10] << 24) + (cdb[11] << 16) + | |
2746 | (cdb[12] << 8) + cdb[13]; | |
2747 | } | |
2748 | ||
2749 | /* | |
2750 | * Used for VARIABLE_LENGTH_CDB WRITE_32 and READ_32 variants | |
2751 | */ | |
2752 | static inline u32 transport_get_sectors_32( | |
2753 | unsigned char *cdb, | |
2754 | struct se_cmd *cmd, | |
2755 | int *ret) | |
2756 | { | |
2757 | /* | |
2758 | * Assume TYPE_DISK for non struct se_device objects. | |
2759 | * Use 32-bit sector value. | |
2760 | */ | |
2761 | return (u32)(cdb[28] << 24) + (cdb[29] << 16) + | |
2762 | (cdb[30] << 8) + cdb[31]; | |
2763 | ||
2764 | } | |
2765 | ||
2766 | static inline u32 transport_get_size( | |
2767 | u32 sectors, | |
2768 | unsigned char *cdb, | |
2769 | struct se_cmd *cmd) | |
2770 | { | |
5951146d | 2771 | struct se_device *dev = cmd->se_dev; |
c66ac9db | 2772 | |
e3d6f909 | 2773 | if (dev->transport->get_device_type(dev) == TYPE_TAPE) { |
c66ac9db | 2774 | if (cdb[1] & 1) { /* sectors */ |
e3d6f909 | 2775 | return dev->se_sub_dev->se_dev_attrib.block_size * sectors; |
c66ac9db NB |
2776 | } else /* bytes */ |
2777 | return sectors; | |
2778 | } | |
2779 | #if 0 | |
2780 | printk(KERN_INFO "Returning block_size: %u, sectors: %u == %u for" | |
e3d6f909 AG |
2781 | " %s object\n", dev->se_sub_dev->se_dev_attrib.block_size, sectors, |
2782 | dev->se_sub_dev->se_dev_attrib.block_size * sectors, | |
2783 | dev->transport->name); | |
c66ac9db | 2784 | #endif |
e3d6f909 | 2785 | return dev->se_sub_dev->se_dev_attrib.block_size * sectors; |
c66ac9db NB |
2786 | } |
2787 | ||
2788 | unsigned char transport_asciihex_to_binaryhex(unsigned char val[2]) | |
2789 | { | |
2790 | unsigned char result = 0; | |
2791 | /* | |
2792 | * MSB | |
2793 | */ | |
2794 | if ((val[0] >= 'a') && (val[0] <= 'f')) | |
2795 | result = ((val[0] - 'a' + 10) & 0xf) << 4; | |
2796 | else | |
2797 | if ((val[0] >= 'A') && (val[0] <= 'F')) | |
2798 | result = ((val[0] - 'A' + 10) & 0xf) << 4; | |
2799 | else /* digit */ | |
2800 | result = ((val[0] - '0') & 0xf) << 4; | |
2801 | /* | |
2802 | * LSB | |
2803 | */ | |
2804 | if ((val[1] >= 'a') && (val[1] <= 'f')) | |
2805 | result |= ((val[1] - 'a' + 10) & 0xf); | |
2806 | else | |
2807 | if ((val[1] >= 'A') && (val[1] <= 'F')) | |
2808 | result |= ((val[1] - 'A' + 10) & 0xf); | |
2809 | else /* digit */ | |
2810 | result |= ((val[1] - '0') & 0xf); | |
2811 | ||
2812 | return result; | |
2813 | } | |
2814 | EXPORT_SYMBOL(transport_asciihex_to_binaryhex); | |
2815 | ||
2816 | static void transport_xor_callback(struct se_cmd *cmd) | |
2817 | { | |
2818 | unsigned char *buf, *addr; | |
ec98f782 | 2819 | struct scatterlist *sg; |
c66ac9db NB |
2820 | unsigned int offset; |
2821 | int i; | |
ec98f782 | 2822 | int count; |
c66ac9db NB |
2823 | /* |
2824 | * From sbc3r22.pdf section 5.48 XDWRITEREAD (10) command | |
2825 | * | |
2826 | * 1) read the specified logical block(s); | |
2827 | * 2) transfer logical blocks from the data-out buffer; | |
2828 | * 3) XOR the logical blocks transferred from the data-out buffer with | |
2829 | * the logical blocks read, storing the resulting XOR data in a buffer; | |
2830 | * 4) if the DISABLE WRITE bit is set to zero, then write the logical | |
2831 | * blocks transferred from the data-out buffer; and | |
2832 | * 5) transfer the resulting XOR data to the data-in buffer. | |
2833 | */ | |
2834 | buf = kmalloc(cmd->data_length, GFP_KERNEL); | |
2835 | if (!(buf)) { | |
2836 | printk(KERN_ERR "Unable to allocate xor_callback buf\n"); | |
2837 | return; | |
2838 | } | |
2839 | /* | |
ec98f782 | 2840 | * Copy the scatterlist WRITE buffer located at cmd->t_data_sg |
c66ac9db NB |
2841 | * into the locally allocated *buf |
2842 | */ | |
ec98f782 AG |
2843 | sg_copy_to_buffer(cmd->t_data_sg, |
2844 | cmd->t_data_nents, | |
2845 | buf, | |
2846 | cmd->data_length); | |
2847 | ||
c66ac9db NB |
2848 | /* |
2849 | * Now perform the XOR against the BIDI read memory located at | |
a1d8b49a | 2850 | * cmd->t_mem_bidi_list |
c66ac9db NB |
2851 | */ |
2852 | ||
2853 | offset = 0; | |
ec98f782 AG |
2854 | for_each_sg(cmd->t_bidi_data_sg, sg, cmd->t_bidi_data_nents, count) { |
2855 | addr = kmap_atomic(sg_page(sg), KM_USER0); | |
2856 | if (!addr) | |
c66ac9db NB |
2857 | goto out; |
2858 | ||
ec98f782 AG |
2859 | for (i = 0; i < sg->length; i++) |
2860 | *(addr + sg->offset + i) ^= *(buf + offset + i); | |
c66ac9db | 2861 | |
ec98f782 | 2862 | offset += sg->length; |
c66ac9db NB |
2863 | kunmap_atomic(addr, KM_USER0); |
2864 | } | |
ec98f782 | 2865 | |
c66ac9db NB |
2866 | out: |
2867 | kfree(buf); | |
2868 | } | |
2869 | ||
2870 | /* | |
2871 | * Used to obtain Sense Data from underlying Linux/SCSI struct scsi_cmnd | |
2872 | */ | |
2873 | static int transport_get_sense_data(struct se_cmd *cmd) | |
2874 | { | |
2875 | unsigned char *buffer = cmd->sense_buffer, *sense_buffer = NULL; | |
2876 | struct se_device *dev; | |
2877 | struct se_task *task = NULL, *task_tmp; | |
2878 | unsigned long flags; | |
2879 | u32 offset = 0; | |
2880 | ||
e3d6f909 AG |
2881 | WARN_ON(!cmd->se_lun); |
2882 | ||
a1d8b49a | 2883 | spin_lock_irqsave(&cmd->t_state_lock, flags); |
c66ac9db | 2884 | if (cmd->se_cmd_flags & SCF_SENT_CHECK_CONDITION) { |
a1d8b49a | 2885 | spin_unlock_irqrestore(&cmd->t_state_lock, flags); |
c66ac9db NB |
2886 | return 0; |
2887 | } | |
2888 | ||
2889 | list_for_each_entry_safe(task, task_tmp, | |
a1d8b49a | 2890 | &cmd->t_task_list, t_list) { |
c66ac9db NB |
2891 | |
2892 | if (!task->task_sense) | |
2893 | continue; | |
2894 | ||
2895 | dev = task->se_dev; | |
2896 | if (!(dev)) | |
2897 | continue; | |
2898 | ||
e3d6f909 AG |
2899 | if (!dev->transport->get_sense_buffer) { |
2900 | printk(KERN_ERR "dev->transport->get_sense_buffer" | |
c66ac9db NB |
2901 | " is NULL\n"); |
2902 | continue; | |
2903 | } | |
2904 | ||
e3d6f909 | 2905 | sense_buffer = dev->transport->get_sense_buffer(task); |
c66ac9db NB |
2906 | if (!(sense_buffer)) { |
2907 | printk(KERN_ERR "ITT[0x%08x]_TASK[%d]: Unable to locate" | |
2908 | " sense buffer for task with sense\n", | |
e3d6f909 | 2909 | cmd->se_tfo->get_task_tag(cmd), task->task_no); |
c66ac9db NB |
2910 | continue; |
2911 | } | |
a1d8b49a | 2912 | spin_unlock_irqrestore(&cmd->t_state_lock, flags); |
c66ac9db | 2913 | |
e3d6f909 | 2914 | offset = cmd->se_tfo->set_fabric_sense_len(cmd, |
c66ac9db NB |
2915 | TRANSPORT_SENSE_BUFFER); |
2916 | ||
5951146d | 2917 | memcpy(&buffer[offset], sense_buffer, |
c66ac9db NB |
2918 | TRANSPORT_SENSE_BUFFER); |
2919 | cmd->scsi_status = task->task_scsi_status; | |
2920 | /* Automatically padded */ | |
2921 | cmd->scsi_sense_length = | |
2922 | (TRANSPORT_SENSE_BUFFER + offset); | |
2923 | ||
2924 | printk(KERN_INFO "HBA_[%u]_PLUG[%s]: Set SAM STATUS: 0x%02x" | |
2925 | " and sense\n", | |
e3d6f909 | 2926 | dev->se_hba->hba_id, dev->transport->name, |
c66ac9db NB |
2927 | cmd->scsi_status); |
2928 | return 0; | |
2929 | } | |
a1d8b49a | 2930 | spin_unlock_irqrestore(&cmd->t_state_lock, flags); |
c66ac9db NB |
2931 | |
2932 | return -1; | |
2933 | } | |
2934 | ||
c66ac9db NB |
2935 | static int |
2936 | transport_handle_reservation_conflict(struct se_cmd *cmd) | |
2937 | { | |
2938 | cmd->transport_wait_for_tasks = &transport_nop_wait_for_tasks; | |
2939 | cmd->se_cmd_flags |= SCF_SCSI_CDB_EXCEPTION; | |
2940 | cmd->se_cmd_flags |= SCF_SCSI_RESERVATION_CONFLICT; | |
2941 | cmd->scsi_status = SAM_STAT_RESERVATION_CONFLICT; | |
2942 | /* | |
2943 | * For UA Interlock Code 11b, a RESERVATION CONFLICT will | |
2944 | * establish a UNIT ATTENTION with PREVIOUS RESERVATION | |
2945 | * CONFLICT STATUS. | |
2946 | * | |
2947 | * See spc4r17, section 7.4.6 Control Mode Page, Table 349 | |
2948 | */ | |
e3d6f909 AG |
2949 | if (cmd->se_sess && |
2950 | cmd->se_dev->se_sub_dev->se_dev_attrib.emulate_ua_intlck_ctrl == 2) | |
2951 | core_scsi3_ua_allocate(cmd->se_sess->se_node_acl, | |
c66ac9db NB |
2952 | cmd->orig_fe_lun, 0x2C, |
2953 | ASCQ_2CH_PREVIOUS_RESERVATION_CONFLICT_STATUS); | |
5951146d | 2954 | return -EINVAL; |
c66ac9db NB |
2955 | } |
2956 | ||
ec98f782 AG |
2957 | static inline long long transport_dev_end_lba(struct se_device *dev) |
2958 | { | |
2959 | return dev->transport->get_blocks(dev) + 1; | |
2960 | } | |
2961 | ||
2962 | static int transport_cmd_get_valid_sectors(struct se_cmd *cmd) | |
2963 | { | |
2964 | struct se_device *dev = cmd->se_dev; | |
2965 | u32 sectors; | |
2966 | ||
2967 | if (dev->transport->get_device_type(dev) != TYPE_DISK) | |
2968 | return 0; | |
2969 | ||
2970 | sectors = (cmd->data_length / dev->se_sub_dev->se_dev_attrib.block_size); | |
2971 | ||
2972 | if ((cmd->t_task_lba + sectors) > | |
2973 | transport_dev_end_lba(dev)) { | |
2974 | printk(KERN_ERR "LBA: %llu Sectors: %u exceeds" | |
2975 | " transport_dev_end_lba(): %llu\n", | |
2976 | cmd->t_task_lba, sectors, | |
2977 | transport_dev_end_lba(dev)); | |
2978 | printk(KERN_ERR " We should return CHECK_CONDITION" | |
2979 | " but we don't yet\n"); | |
2980 | return 0; | |
2981 | } | |
2982 | ||
2983 | return sectors; | |
2984 | } | |
2985 | ||
c66ac9db NB |
2986 | /* transport_generic_cmd_sequencer(): |
2987 | * | |
2988 | * Generic Command Sequencer that should work for most DAS transport | |
2989 | * drivers. | |
2990 | * | |
2991 | * Called from transport_generic_allocate_tasks() in the $FABRIC_MOD | |
2992 | * RX Thread. | |
2993 | * | |
2994 | * FIXME: Need to support other SCSI OPCODES where as well. | |
2995 | */ | |
2996 | static int transport_generic_cmd_sequencer( | |
2997 | struct se_cmd *cmd, | |
2998 | unsigned char *cdb) | |
2999 | { | |
5951146d | 3000 | struct se_device *dev = cmd->se_dev; |
c66ac9db NB |
3001 | struct se_subsystem_dev *su_dev = dev->se_sub_dev; |
3002 | int ret = 0, sector_ret = 0, passthrough; | |
3003 | u32 sectors = 0, size = 0, pr_reg_type = 0; | |
3004 | u16 service_action; | |
3005 | u8 alua_ascq = 0; | |
3006 | /* | |
3007 | * Check for an existing UNIT ATTENTION condition | |
3008 | */ | |
3009 | if (core_scsi3_ua_check(cmd, cdb) < 0) { | |
3010 | cmd->transport_wait_for_tasks = | |
3011 | &transport_nop_wait_for_tasks; | |
3012 | cmd->se_cmd_flags |= SCF_SCSI_CDB_EXCEPTION; | |
3013 | cmd->scsi_sense_reason = TCM_CHECK_CONDITION_UNIT_ATTENTION; | |
5951146d | 3014 | return -EINVAL; |
c66ac9db NB |
3015 | } |
3016 | /* | |
3017 | * Check status of Asymmetric Logical Unit Assignment port | |
3018 | */ | |
e3d6f909 | 3019 | ret = su_dev->t10_alua.alua_state_check(cmd, cdb, &alua_ascq); |
c66ac9db NB |
3020 | if (ret != 0) { |
3021 | cmd->transport_wait_for_tasks = &transport_nop_wait_for_tasks; | |
3022 | /* | |
25985edc | 3023 | * Set SCSI additional sense code (ASC) to 'LUN Not Accessible'; |
c66ac9db NB |
3024 | * The ALUA additional sense code qualifier (ASCQ) is determined |
3025 | * by the ALUA primary or secondary access state.. | |
3026 | */ | |
3027 | if (ret > 0) { | |
3028 | #if 0 | |
3029 | printk(KERN_INFO "[%s]: ALUA TG Port not available," | |
3030 | " SenseKey: NOT_READY, ASC/ASCQ: 0x04/0x%02x\n", | |
e3d6f909 | 3031 | cmd->se_tfo->get_fabric_name(), alua_ascq); |
c66ac9db NB |
3032 | #endif |
3033 | transport_set_sense_codes(cmd, 0x04, alua_ascq); | |
3034 | cmd->se_cmd_flags |= SCF_SCSI_CDB_EXCEPTION; | |
3035 | cmd->scsi_sense_reason = TCM_CHECK_CONDITION_NOT_READY; | |
5951146d | 3036 | return -EINVAL; |
c66ac9db NB |
3037 | } |
3038 | goto out_invalid_cdb_field; | |
3039 | } | |
3040 | /* | |
3041 | * Check status for SPC-3 Persistent Reservations | |
3042 | */ | |
e3d6f909 AG |
3043 | if (su_dev->t10_pr.pr_ops.t10_reservation_check(cmd, &pr_reg_type) != 0) { |
3044 | if (su_dev->t10_pr.pr_ops.t10_seq_non_holder( | |
c66ac9db NB |
3045 | cmd, cdb, pr_reg_type) != 0) |
3046 | return transport_handle_reservation_conflict(cmd); | |
3047 | /* | |
3048 | * This means the CDB is allowed for the SCSI Initiator port | |
3049 | * when said port is *NOT* holding the legacy SPC-2 or | |
3050 | * SPC-3 Persistent Reservation. | |
3051 | */ | |
3052 | } | |
3053 | ||
3054 | switch (cdb[0]) { | |
3055 | case READ_6: | |
3056 | sectors = transport_get_sectors_6(cdb, cmd, §or_ret); | |
3057 | if (sector_ret) | |
3058 | goto out_unsupported_cdb; | |
3059 | size = transport_get_size(sectors, cdb, cmd); | |
3060 | cmd->transport_split_cdb = &split_cdb_XX_6; | |
a1d8b49a | 3061 | cmd->t_task_lba = transport_lba_21(cdb); |
c66ac9db NB |
3062 | cmd->se_cmd_flags |= SCF_SCSI_DATA_SG_IO_CDB; |
3063 | break; | |
3064 | case READ_10: | |
3065 | sectors = transport_get_sectors_10(cdb, cmd, §or_ret); | |
3066 | if (sector_ret) | |
3067 | goto out_unsupported_cdb; | |
3068 | size = transport_get_size(sectors, cdb, cmd); | |
3069 | cmd->transport_split_cdb = &split_cdb_XX_10; | |
a1d8b49a | 3070 | cmd->t_task_lba = transport_lba_32(cdb); |
c66ac9db NB |
3071 | cmd->se_cmd_flags |= SCF_SCSI_DATA_SG_IO_CDB; |
3072 | break; | |
3073 | case READ_12: | |
3074 | sectors = transport_get_sectors_12(cdb, cmd, §or_ret); | |
3075 | if (sector_ret) | |
3076 | goto out_unsupported_cdb; | |
3077 | size = transport_get_size(sectors, cdb, cmd); | |
3078 | cmd->transport_split_cdb = &split_cdb_XX_12; | |
a1d8b49a | 3079 | cmd->t_task_lba = transport_lba_32(cdb); |
c66ac9db NB |
3080 | cmd->se_cmd_flags |= SCF_SCSI_DATA_SG_IO_CDB; |
3081 | break; | |
3082 | case READ_16: | |
3083 | sectors = transport_get_sectors_16(cdb, cmd, §or_ret); | |
3084 | if (sector_ret) | |
3085 | goto out_unsupported_cdb; | |
3086 | size = transport_get_size(sectors, cdb, cmd); | |
3087 | cmd->transport_split_cdb = &split_cdb_XX_16; | |
a1d8b49a | 3088 | cmd->t_task_lba = transport_lba_64(cdb); |
c66ac9db NB |
3089 | cmd->se_cmd_flags |= SCF_SCSI_DATA_SG_IO_CDB; |
3090 | break; | |
3091 | case WRITE_6: | |
3092 | sectors = transport_get_sectors_6(cdb, cmd, §or_ret); | |
3093 | if (sector_ret) | |
3094 | goto out_unsupported_cdb; | |
3095 | size = transport_get_size(sectors, cdb, cmd); | |
3096 | cmd->transport_split_cdb = &split_cdb_XX_6; | |
a1d8b49a | 3097 | cmd->t_task_lba = transport_lba_21(cdb); |
c66ac9db NB |
3098 | cmd->se_cmd_flags |= SCF_SCSI_DATA_SG_IO_CDB; |
3099 | break; | |
3100 | case WRITE_10: | |
3101 | sectors = transport_get_sectors_10(cdb, cmd, §or_ret); | |
3102 | if (sector_ret) | |
3103 | goto out_unsupported_cdb; | |
3104 | size = transport_get_size(sectors, cdb, cmd); | |
3105 | cmd->transport_split_cdb = &split_cdb_XX_10; | |
a1d8b49a AG |
3106 | cmd->t_task_lba = transport_lba_32(cdb); |
3107 | cmd->t_tasks_fua = (cdb[1] & 0x8); | |
c66ac9db NB |
3108 | cmd->se_cmd_flags |= SCF_SCSI_DATA_SG_IO_CDB; |
3109 | break; | |
3110 | case WRITE_12: | |
3111 | sectors = transport_get_sectors_12(cdb, cmd, §or_ret); | |
3112 | if (sector_ret) | |
3113 | goto out_unsupported_cdb; | |
3114 | size = transport_get_size(sectors, cdb, cmd); | |
3115 | cmd->transport_split_cdb = &split_cdb_XX_12; | |
a1d8b49a AG |
3116 | cmd->t_task_lba = transport_lba_32(cdb); |
3117 | cmd->t_tasks_fua = (cdb[1] & 0x8); | |
c66ac9db NB |
3118 | cmd->se_cmd_flags |= SCF_SCSI_DATA_SG_IO_CDB; |
3119 | break; | |
3120 | case WRITE_16: | |
3121 | sectors = transport_get_sectors_16(cdb, cmd, §or_ret); | |
3122 | if (sector_ret) | |
3123 | goto out_unsupported_cdb; | |
3124 | size = transport_get_size(sectors, cdb, cmd); | |
3125 | cmd->transport_split_cdb = &split_cdb_XX_16; | |
a1d8b49a AG |
3126 | cmd->t_task_lba = transport_lba_64(cdb); |
3127 | cmd->t_tasks_fua = (cdb[1] & 0x8); | |
c66ac9db NB |
3128 | cmd->se_cmd_flags |= SCF_SCSI_DATA_SG_IO_CDB; |
3129 | break; | |
3130 | case XDWRITEREAD_10: | |
3131 | if ((cmd->data_direction != DMA_TO_DEVICE) || | |
a1d8b49a | 3132 | !(cmd->t_tasks_bidi)) |
c66ac9db NB |
3133 | goto out_invalid_cdb_field; |
3134 | sectors = transport_get_sectors_10(cdb, cmd, §or_ret); | |
3135 | if (sector_ret) | |
3136 | goto out_unsupported_cdb; | |
3137 | size = transport_get_size(sectors, cdb, cmd); | |
3138 | cmd->transport_split_cdb = &split_cdb_XX_10; | |
a1d8b49a | 3139 | cmd->t_task_lba = transport_lba_32(cdb); |
c66ac9db | 3140 | cmd->se_cmd_flags |= SCF_SCSI_DATA_SG_IO_CDB; |
e3d6f909 | 3141 | passthrough = (dev->transport->transport_type == |
c66ac9db NB |
3142 | TRANSPORT_PLUGIN_PHBA_PDEV); |
3143 | /* | |
3144 | * Skip the remaining assignments for TCM/PSCSI passthrough | |
3145 | */ | |
3146 | if (passthrough) | |
3147 | break; | |
3148 | /* | |
3149 | * Setup BIDI XOR callback to be run during transport_generic_complete_ok() | |
3150 | */ | |
3151 | cmd->transport_complete_callback = &transport_xor_callback; | |
a1d8b49a | 3152 | cmd->t_tasks_fua = (cdb[1] & 0x8); |
c66ac9db NB |
3153 | break; |
3154 | case VARIABLE_LENGTH_CMD: | |
3155 | service_action = get_unaligned_be16(&cdb[8]); | |
3156 | /* | |
3157 | * Determine if this is TCM/PSCSI device and we should disable | |
3158 | * internal emulation for this CDB. | |
3159 | */ | |
e3d6f909 | 3160 | passthrough = (dev->transport->transport_type == |
c66ac9db NB |
3161 | TRANSPORT_PLUGIN_PHBA_PDEV); |
3162 | ||
3163 | switch (service_action) { | |
3164 | case XDWRITEREAD_32: | |
3165 | sectors = transport_get_sectors_32(cdb, cmd, §or_ret); | |
3166 | if (sector_ret) | |
3167 | goto out_unsupported_cdb; | |
3168 | size = transport_get_size(sectors, cdb, cmd); | |
3169 | /* | |
3170 | * Use WRITE_32 and READ_32 opcodes for the emulated | |
3171 | * XDWRITE_READ_32 logic. | |
3172 | */ | |
3173 | cmd->transport_split_cdb = &split_cdb_XX_32; | |
a1d8b49a | 3174 | cmd->t_task_lba = transport_lba_64_ext(cdb); |
c66ac9db NB |
3175 | cmd->se_cmd_flags |= SCF_SCSI_DATA_SG_IO_CDB; |
3176 | ||
3177 | /* | |
3178 | * Skip the remaining assignments for TCM/PSCSI passthrough | |
3179 | */ | |
3180 | if (passthrough) | |
3181 | break; | |
3182 | ||
3183 | /* | |
3184 | * Setup BIDI XOR callback to be run during | |
3185 | * transport_generic_complete_ok() | |
3186 | */ | |
3187 | cmd->transport_complete_callback = &transport_xor_callback; | |
a1d8b49a | 3188 | cmd->t_tasks_fua = (cdb[10] & 0x8); |
c66ac9db NB |
3189 | break; |
3190 | case WRITE_SAME_32: | |
3191 | sectors = transport_get_sectors_32(cdb, cmd, §or_ret); | |
3192 | if (sector_ret) | |
3193 | goto out_unsupported_cdb; | |
dd3a5ad8 NB |
3194 | |
3195 | if (sectors != 0) | |
3196 | size = transport_get_size(sectors, cdb, cmd); | |
3197 | else | |
3198 | size = dev->se_sub_dev->se_dev_attrib.block_size; | |
3199 | ||
a1d8b49a | 3200 | cmd->t_task_lba = get_unaligned_be64(&cdb[12]); |
c66ac9db NB |
3201 | cmd->se_cmd_flags |= SCF_SCSI_CONTROL_SG_IO_CDB; |
3202 | ||
3203 | /* | |
3204 | * Skip the remaining assignments for TCM/PSCSI passthrough | |
3205 | */ | |
3206 | if (passthrough) | |
3207 | break; | |
3208 | ||
3209 | if ((cdb[10] & 0x04) || (cdb[10] & 0x02)) { | |
3210 | printk(KERN_ERR "WRITE_SAME PBDATA and LBDATA" | |
3211 | " bits not supported for Block Discard" | |
3212 | " Emulation\n"); | |
3213 | goto out_invalid_cdb_field; | |
3214 | } | |
3215 | /* | |
3216 | * Currently for the emulated case we only accept | |
3217 | * tpws with the UNMAP=1 bit set. | |
3218 | */ | |
3219 | if (!(cdb[10] & 0x08)) { | |
3220 | printk(KERN_ERR "WRITE_SAME w/o UNMAP bit not" | |
3221 | " supported for Block Discard Emulation\n"); | |
3222 | goto out_invalid_cdb_field; | |
3223 | } | |
3224 | break; | |
3225 | default: | |
3226 | printk(KERN_ERR "VARIABLE_LENGTH_CMD service action" | |
3227 | " 0x%04x not supported\n", service_action); | |
3228 | goto out_unsupported_cdb; | |
3229 | } | |
3230 | break; | |
e434f1f1 | 3231 | case MAINTENANCE_IN: |
e3d6f909 | 3232 | if (dev->transport->get_device_type(dev) != TYPE_ROM) { |
c66ac9db NB |
3233 | /* MAINTENANCE_IN from SCC-2 */ |
3234 | /* | |
3235 | * Check for emulated MI_REPORT_TARGET_PGS. | |
3236 | */ | |
3237 | if (cdb[1] == MI_REPORT_TARGET_PGS) { | |
3238 | cmd->transport_emulate_cdb = | |
e3d6f909 | 3239 | (su_dev->t10_alua.alua_type == |
c66ac9db | 3240 | SPC3_ALUA_EMULATED) ? |
e3d6f909 | 3241 | core_emulate_report_target_port_groups : |
c66ac9db NB |
3242 | NULL; |
3243 | } | |
3244 | size = (cdb[6] << 24) | (cdb[7] << 16) | | |
3245 | (cdb[8] << 8) | cdb[9]; | |
3246 | } else { | |
3247 | /* GPCMD_SEND_KEY from multi media commands */ | |
3248 | size = (cdb[8] << 8) + cdb[9]; | |
3249 | } | |
05d1c7c0 | 3250 | cmd->se_cmd_flags |= SCF_SCSI_CONTROL_SG_IO_CDB; |
c66ac9db NB |
3251 | break; |
3252 | case MODE_SELECT: | |
3253 | size = cdb[4]; | |
3254 | cmd->se_cmd_flags |= SCF_SCSI_CONTROL_SG_IO_CDB; | |
3255 | break; | |
3256 | case MODE_SELECT_10: | |
3257 | size = (cdb[7] << 8) + cdb[8]; | |
3258 | cmd->se_cmd_flags |= SCF_SCSI_CONTROL_SG_IO_CDB; | |
3259 | break; | |
3260 | case MODE_SENSE: | |
3261 | size = cdb[4]; | |
05d1c7c0 | 3262 | cmd->se_cmd_flags |= SCF_SCSI_CONTROL_SG_IO_CDB; |
c66ac9db NB |
3263 | break; |
3264 | case MODE_SENSE_10: | |
3265 | case GPCMD_READ_BUFFER_CAPACITY: | |
3266 | case GPCMD_SEND_OPC: | |
3267 | case LOG_SELECT: | |
3268 | case LOG_SENSE: | |
3269 | size = (cdb[7] << 8) + cdb[8]; | |
05d1c7c0 | 3270 | cmd->se_cmd_flags |= SCF_SCSI_CONTROL_SG_IO_CDB; |
c66ac9db NB |
3271 | break; |
3272 | case READ_BLOCK_LIMITS: | |
3273 | size = READ_BLOCK_LEN; | |
05d1c7c0 | 3274 | cmd->se_cmd_flags |= SCF_SCSI_CONTROL_SG_IO_CDB; |
c66ac9db NB |
3275 | break; |
3276 | case GPCMD_GET_CONFIGURATION: | |
3277 | case GPCMD_READ_FORMAT_CAPACITIES: | |
3278 | case GPCMD_READ_DISC_INFO: | |
3279 | case GPCMD_READ_TRACK_RZONE_INFO: | |
3280 | size = (cdb[7] << 8) + cdb[8]; | |
3281 | cmd->se_cmd_flags |= SCF_SCSI_CONTROL_SG_IO_CDB; | |
3282 | break; | |
3283 | case PERSISTENT_RESERVE_IN: | |
3284 | case PERSISTENT_RESERVE_OUT: | |
3285 | cmd->transport_emulate_cdb = | |
e3d6f909 | 3286 | (su_dev->t10_pr.res_type == |
c66ac9db | 3287 | SPC3_PERSISTENT_RESERVATIONS) ? |
e3d6f909 | 3288 | core_scsi3_emulate_pr : NULL; |
c66ac9db | 3289 | size = (cdb[7] << 8) + cdb[8]; |
05d1c7c0 | 3290 | cmd->se_cmd_flags |= SCF_SCSI_CONTROL_SG_IO_CDB; |
c66ac9db NB |
3291 | break; |
3292 | case GPCMD_MECHANISM_STATUS: | |
3293 | case GPCMD_READ_DVD_STRUCTURE: | |
3294 | size = (cdb[8] << 8) + cdb[9]; | |
3295 | cmd->se_cmd_flags |= SCF_SCSI_CONTROL_SG_IO_CDB; | |
3296 | break; | |
3297 | case READ_POSITION: | |
3298 | size = READ_POSITION_LEN; | |
05d1c7c0 | 3299 | cmd->se_cmd_flags |= SCF_SCSI_CONTROL_SG_IO_CDB; |
c66ac9db | 3300 | break; |
e434f1f1 | 3301 | case MAINTENANCE_OUT: |
e3d6f909 | 3302 | if (dev->transport->get_device_type(dev) != TYPE_ROM) { |
c66ac9db NB |
3303 | /* MAINTENANCE_OUT from SCC-2 |
3304 | * | |
3305 | * Check for emulated MO_SET_TARGET_PGS. | |
3306 | */ | |
3307 | if (cdb[1] == MO_SET_TARGET_PGS) { | |
3308 | cmd->transport_emulate_cdb = | |
e3d6f909 | 3309 | (su_dev->t10_alua.alua_type == |
c66ac9db | 3310 | SPC3_ALUA_EMULATED) ? |
e3d6f909 | 3311 | core_emulate_set_target_port_groups : |
c66ac9db NB |
3312 | NULL; |
3313 | } | |
3314 | ||
3315 | size = (cdb[6] << 24) | (cdb[7] << 16) | | |
3316 | (cdb[8] << 8) | cdb[9]; | |
3317 | } else { | |
3318 | /* GPCMD_REPORT_KEY from multi media commands */ | |
3319 | size = (cdb[8] << 8) + cdb[9]; | |
3320 | } | |
05d1c7c0 | 3321 | cmd->se_cmd_flags |= SCF_SCSI_CONTROL_SG_IO_CDB; |
c66ac9db NB |
3322 | break; |
3323 | case INQUIRY: | |
3324 | size = (cdb[3] << 8) + cdb[4]; | |
3325 | /* | |
3326 | * Do implict HEAD_OF_QUEUE processing for INQUIRY. | |
3327 | * See spc4r17 section 5.3 | |
3328 | */ | |
5951146d | 3329 | if (cmd->se_dev->dev_task_attr_type == SAM_TASK_ATTR_EMULATED) |
e66ecd50 | 3330 | cmd->sam_task_attr = MSG_HEAD_TAG; |
05d1c7c0 | 3331 | cmd->se_cmd_flags |= SCF_SCSI_CONTROL_SG_IO_CDB; |
c66ac9db NB |
3332 | break; |
3333 | case READ_BUFFER: | |
3334 | size = (cdb[6] << 16) + (cdb[7] << 8) + cdb[8]; | |
05d1c7c0 | 3335 | cmd->se_cmd_flags |= SCF_SCSI_CONTROL_SG_IO_CDB; |
c66ac9db NB |
3336 | break; |
3337 | case READ_CAPACITY: | |
3338 | size = READ_CAP_LEN; | |
05d1c7c0 | 3339 | cmd->se_cmd_flags |= SCF_SCSI_CONTROL_SG_IO_CDB; |
c66ac9db NB |
3340 | break; |
3341 | case READ_MEDIA_SERIAL_NUMBER: | |
3342 | case SECURITY_PROTOCOL_IN: | |
3343 | case SECURITY_PROTOCOL_OUT: | |
3344 | size = (cdb[6] << 24) | (cdb[7] << 16) | (cdb[8] << 8) | cdb[9]; | |
05d1c7c0 | 3345 | cmd->se_cmd_flags |= SCF_SCSI_CONTROL_SG_IO_CDB; |
c66ac9db NB |
3346 | break; |
3347 | case SERVICE_ACTION_IN: | |
3348 | case ACCESS_CONTROL_IN: | |
3349 | case ACCESS_CONTROL_OUT: | |
3350 | case EXTENDED_COPY: | |
3351 | case READ_ATTRIBUTE: | |
3352 | case RECEIVE_COPY_RESULTS: | |
3353 | case WRITE_ATTRIBUTE: | |
3354 | size = (cdb[10] << 24) | (cdb[11] << 16) | | |
3355 | (cdb[12] << 8) | cdb[13]; | |
05d1c7c0 | 3356 | cmd->se_cmd_flags |= SCF_SCSI_CONTROL_SG_IO_CDB; |
c66ac9db NB |
3357 | break; |
3358 | case RECEIVE_DIAGNOSTIC: | |
3359 | case SEND_DIAGNOSTIC: | |
3360 | size = (cdb[3] << 8) | cdb[4]; | |
05d1c7c0 | 3361 | cmd->se_cmd_flags |= SCF_SCSI_CONTROL_SG_IO_CDB; |
c66ac9db NB |
3362 | break; |
3363 | /* #warning FIXME: Figure out correct GPCMD_READ_CD blocksize. */ | |
3364 | #if 0 | |
3365 | case GPCMD_READ_CD: | |
3366 | sectors = (cdb[6] << 16) + (cdb[7] << 8) + cdb[8]; | |
3367 | size = (2336 * sectors); | |
05d1c7c0 | 3368 | cmd->se_cmd_flags |= SCF_SCSI_CONTROL_SG_IO_CDB; |
c66ac9db NB |
3369 | break; |
3370 | #endif | |
3371 | case READ_TOC: | |
3372 | size = cdb[8]; | |
05d1c7c0 | 3373 | cmd->se_cmd_flags |= SCF_SCSI_CONTROL_SG_IO_CDB; |
c66ac9db NB |
3374 | break; |
3375 | case REQUEST_SENSE: | |
3376 | size = cdb[4]; | |
05d1c7c0 | 3377 | cmd->se_cmd_flags |= SCF_SCSI_CONTROL_SG_IO_CDB; |
c66ac9db NB |
3378 | break; |
3379 | case READ_ELEMENT_STATUS: | |
3380 | size = 65536 * cdb[7] + 256 * cdb[8] + cdb[9]; | |
05d1c7c0 | 3381 | cmd->se_cmd_flags |= SCF_SCSI_CONTROL_SG_IO_CDB; |
c66ac9db NB |
3382 | break; |
3383 | case WRITE_BUFFER: | |
3384 | size = (cdb[6] << 16) + (cdb[7] << 8) + cdb[8]; | |
05d1c7c0 | 3385 | cmd->se_cmd_flags |= SCF_SCSI_CONTROL_SG_IO_CDB; |
c66ac9db NB |
3386 | break; |
3387 | case RESERVE: | |
3388 | case RESERVE_10: | |
3389 | /* | |
3390 | * The SPC-2 RESERVE does not contain a size in the SCSI CDB. | |
3391 | * Assume the passthrough or $FABRIC_MOD will tell us about it. | |
3392 | */ | |
3393 | if (cdb[0] == RESERVE_10) | |
3394 | size = (cdb[7] << 8) | cdb[8]; | |
3395 | else | |
3396 | size = cmd->data_length; | |
3397 | ||
3398 | /* | |
3399 | * Setup the legacy emulated handler for SPC-2 and | |
3400 | * >= SPC-3 compatible reservation handling (CRH=1) | |
3401 | * Otherwise, we assume the underlying SCSI logic is | |
3402 | * is running in SPC_PASSTHROUGH, and wants reservations | |
3403 | * emulation disabled. | |
3404 | */ | |
3405 | cmd->transport_emulate_cdb = | |
e3d6f909 | 3406 | (su_dev->t10_pr.res_type != |
c66ac9db | 3407 | SPC_PASSTHROUGH) ? |
e3d6f909 | 3408 | core_scsi2_emulate_crh : NULL; |
c66ac9db NB |
3409 | cmd->se_cmd_flags |= SCF_SCSI_NON_DATA_CDB; |
3410 | break; | |
3411 | case RELEASE: | |
3412 | case RELEASE_10: | |
3413 | /* | |
3414 | * The SPC-2 RELEASE does not contain a size in the SCSI CDB. | |
3415 | * Assume the passthrough or $FABRIC_MOD will tell us about it. | |
3416 | */ | |
3417 | if (cdb[0] == RELEASE_10) | |
3418 | size = (cdb[7] << 8) | cdb[8]; | |
3419 | else | |
3420 | size = cmd->data_length; | |
3421 | ||
3422 | cmd->transport_emulate_cdb = | |
e3d6f909 | 3423 | (su_dev->t10_pr.res_type != |
c66ac9db | 3424 | SPC_PASSTHROUGH) ? |
e3d6f909 | 3425 | core_scsi2_emulate_crh : NULL; |
c66ac9db NB |
3426 | cmd->se_cmd_flags |= SCF_SCSI_NON_DATA_CDB; |
3427 | break; | |
3428 | case SYNCHRONIZE_CACHE: | |
3429 | case 0x91: /* SYNCHRONIZE_CACHE_16: */ | |
3430 | /* | |
3431 | * Extract LBA and range to be flushed for emulated SYNCHRONIZE_CACHE | |
3432 | */ | |
3433 | if (cdb[0] == SYNCHRONIZE_CACHE) { | |
3434 | sectors = transport_get_sectors_10(cdb, cmd, §or_ret); | |
a1d8b49a | 3435 | cmd->t_task_lba = transport_lba_32(cdb); |
c66ac9db NB |
3436 | } else { |
3437 | sectors = transport_get_sectors_16(cdb, cmd, §or_ret); | |
a1d8b49a | 3438 | cmd->t_task_lba = transport_lba_64(cdb); |
c66ac9db NB |
3439 | } |
3440 | if (sector_ret) | |
3441 | goto out_unsupported_cdb; | |
3442 | ||
3443 | size = transport_get_size(sectors, cdb, cmd); | |
3444 | cmd->se_cmd_flags |= SCF_SCSI_NON_DATA_CDB; | |
3445 | ||
3446 | /* | |
3447 | * For TCM/pSCSI passthrough, skip cmd->transport_emulate_cdb() | |
3448 | */ | |
e3d6f909 | 3449 | if (dev->transport->transport_type == TRANSPORT_PLUGIN_PHBA_PDEV) |
c66ac9db NB |
3450 | break; |
3451 | /* | |
3452 | * Set SCF_EMULATE_CDB_ASYNC to ensure asynchronous operation | |
3453 | * for SYNCHRONIZE_CACHE* Immed=1 case in __transport_execute_tasks() | |
3454 | */ | |
3455 | cmd->se_cmd_flags |= SCF_EMULATE_CDB_ASYNC; | |
3456 | /* | |
3457 | * Check to ensure that LBA + Range does not exceed past end of | |
3458 | * device. | |
3459 | */ | |
a1d8b49a | 3460 | if (!transport_cmd_get_valid_sectors(cmd)) |
c66ac9db NB |
3461 | goto out_invalid_cdb_field; |
3462 | break; | |
3463 | case UNMAP: | |
3464 | size = get_unaligned_be16(&cdb[7]); | |
05d1c7c0 | 3465 | cmd->se_cmd_flags |= SCF_SCSI_CONTROL_SG_IO_CDB; |
c66ac9db NB |
3466 | break; |
3467 | case WRITE_SAME_16: | |
3468 | sectors = transport_get_sectors_16(cdb, cmd, §or_ret); | |
3469 | if (sector_ret) | |
3470 | goto out_unsupported_cdb; | |
dd3a5ad8 NB |
3471 | |
3472 | if (sectors != 0) | |
3473 | size = transport_get_size(sectors, cdb, cmd); | |
3474 | else | |
3475 | size = dev->se_sub_dev->se_dev_attrib.block_size; | |
3476 | ||
a1d8b49a | 3477 | cmd->t_task_lba = get_unaligned_be16(&cdb[2]); |
e3d6f909 | 3478 | passthrough = (dev->transport->transport_type == |
c66ac9db NB |
3479 | TRANSPORT_PLUGIN_PHBA_PDEV); |
3480 | /* | |
3481 | * Determine if the received WRITE_SAME_16 is used to for direct | |
3482 | * passthrough into Linux/SCSI with struct request via TCM/pSCSI | |
3483 | * or we are signaling the use of internal WRITE_SAME + UNMAP=1 | |
3484 | * emulation for -> Linux/BLOCK disbard with TCM/IBLOCK and | |
3485 | * TCM/FILEIO subsystem plugin backstores. | |
3486 | */ | |
3487 | if (!(passthrough)) { | |
3488 | if ((cdb[1] & 0x04) || (cdb[1] & 0x02)) { | |
3489 | printk(KERN_ERR "WRITE_SAME PBDATA and LBDATA" | |
3490 | " bits not supported for Block Discard" | |
3491 | " Emulation\n"); | |
3492 | goto out_invalid_cdb_field; | |
3493 | } | |
3494 | /* | |
3495 | * Currently for the emulated case we only accept | |
3496 | * tpws with the UNMAP=1 bit set. | |
3497 | */ | |
3498 | if (!(cdb[1] & 0x08)) { | |
3499 | printk(KERN_ERR "WRITE_SAME w/o UNMAP bit not " | |
3500 | " supported for Block Discard Emulation\n"); | |
3501 | goto out_invalid_cdb_field; | |
3502 | } | |
3503 | } | |
3504 | cmd->se_cmd_flags |= SCF_SCSI_CONTROL_SG_IO_CDB; | |
3505 | break; | |
3506 | case ALLOW_MEDIUM_REMOVAL: | |
3507 | case GPCMD_CLOSE_TRACK: | |
3508 | case ERASE: | |
3509 | case INITIALIZE_ELEMENT_STATUS: | |
3510 | case GPCMD_LOAD_UNLOAD: | |
3511 | case REZERO_UNIT: | |
3512 | case SEEK_10: | |
3513 | case GPCMD_SET_SPEED: | |
3514 | case SPACE: | |
3515 | case START_STOP: | |
3516 | case TEST_UNIT_READY: | |
3517 | case VERIFY: | |
3518 | case WRITE_FILEMARKS: | |
3519 | case MOVE_MEDIUM: | |
3520 | cmd->se_cmd_flags |= SCF_SCSI_NON_DATA_CDB; | |
3521 | break; | |
3522 | case REPORT_LUNS: | |
3523 | cmd->transport_emulate_cdb = | |
e3d6f909 | 3524 | transport_core_report_lun_response; |
c66ac9db NB |
3525 | size = (cdb[6] << 24) | (cdb[7] << 16) | (cdb[8] << 8) | cdb[9]; |
3526 | /* | |
3527 | * Do implict HEAD_OF_QUEUE processing for REPORT_LUNS | |
3528 | * See spc4r17 section 5.3 | |
3529 | */ | |
5951146d | 3530 | if (cmd->se_dev->dev_task_attr_type == SAM_TASK_ATTR_EMULATED) |
e66ecd50 | 3531 | cmd->sam_task_attr = MSG_HEAD_TAG; |
05d1c7c0 | 3532 | cmd->se_cmd_flags |= SCF_SCSI_CONTROL_SG_IO_CDB; |
c66ac9db NB |
3533 | break; |
3534 | default: | |
3535 | printk(KERN_WARNING "TARGET_CORE[%s]: Unsupported SCSI Opcode" | |
3536 | " 0x%02x, sending CHECK_CONDITION.\n", | |
e3d6f909 | 3537 | cmd->se_tfo->get_fabric_name(), cdb[0]); |
c66ac9db NB |
3538 | cmd->transport_wait_for_tasks = &transport_nop_wait_for_tasks; |
3539 | goto out_unsupported_cdb; | |
3540 | } | |
3541 | ||
3542 | if (size != cmd->data_length) { | |
3543 | printk(KERN_WARNING "TARGET_CORE[%s]: Expected Transfer Length:" | |
3544 | " %u does not match SCSI CDB Length: %u for SAM Opcode:" | |
e3d6f909 | 3545 | " 0x%02x\n", cmd->se_tfo->get_fabric_name(), |
c66ac9db NB |
3546 | cmd->data_length, size, cdb[0]); |
3547 | ||
3548 | cmd->cmd_spdtl = size; | |
3549 | ||
3550 | if (cmd->data_direction == DMA_TO_DEVICE) { | |
3551 | printk(KERN_ERR "Rejecting underflow/overflow" | |
3552 | " WRITE data\n"); | |
3553 | goto out_invalid_cdb_field; | |
3554 | } | |
3555 | /* | |
3556 | * Reject READ_* or WRITE_* with overflow/underflow for | |
3557 | * type SCF_SCSI_DATA_SG_IO_CDB. | |
3558 | */ | |
e3d6f909 | 3559 | if (!(ret) && (dev->se_sub_dev->se_dev_attrib.block_size != 512)) { |
c66ac9db NB |
3560 | printk(KERN_ERR "Failing OVERFLOW/UNDERFLOW for LBA op" |
3561 | " CDB on non 512-byte sector setup subsystem" | |
e3d6f909 | 3562 | " plugin: %s\n", dev->transport->name); |
c66ac9db NB |
3563 | /* Returns CHECK_CONDITION + INVALID_CDB_FIELD */ |
3564 | goto out_invalid_cdb_field; | |
3565 | } | |
3566 | ||
3567 | if (size > cmd->data_length) { | |
3568 | cmd->se_cmd_flags |= SCF_OVERFLOW_BIT; | |
3569 | cmd->residual_count = (size - cmd->data_length); | |
3570 | } else { | |
3571 | cmd->se_cmd_flags |= SCF_UNDERFLOW_BIT; | |
3572 | cmd->residual_count = (cmd->data_length - size); | |
3573 | } | |
3574 | cmd->data_length = size; | |
3575 | } | |
3576 | ||
d0229ae3 AG |
3577 | /* Let's limit control cdbs to a page, for simplicity's sake. */ |
3578 | if ((cmd->se_cmd_flags & SCF_SCSI_CONTROL_SG_IO_CDB) && | |
3579 | size > PAGE_SIZE) | |
3580 | goto out_invalid_cdb_field; | |
3581 | ||
c66ac9db NB |
3582 | transport_set_supported_SAM_opcode(cmd); |
3583 | return ret; | |
3584 | ||
3585 | out_unsupported_cdb: | |
3586 | cmd->se_cmd_flags |= SCF_SCSI_CDB_EXCEPTION; | |
3587 | cmd->scsi_sense_reason = TCM_UNSUPPORTED_SCSI_OPCODE; | |
5951146d | 3588 | return -EINVAL; |
c66ac9db NB |
3589 | out_invalid_cdb_field: |
3590 | cmd->se_cmd_flags |= SCF_SCSI_CDB_EXCEPTION; | |
3591 | cmd->scsi_sense_reason = TCM_INVALID_CDB_FIELD; | |
5951146d | 3592 | return -EINVAL; |
c66ac9db NB |
3593 | } |
3594 | ||
c66ac9db NB |
3595 | /* |
3596 | * Called from transport_generic_complete_ok() and | |
3597 | * transport_generic_request_failure() to determine which dormant/delayed | |
3598 | * and ordered cmds need to have their tasks added to the execution queue. | |
3599 | */ | |
3600 | static void transport_complete_task_attr(struct se_cmd *cmd) | |
3601 | { | |
5951146d | 3602 | struct se_device *dev = cmd->se_dev; |
c66ac9db NB |
3603 | struct se_cmd *cmd_p, *cmd_tmp; |
3604 | int new_active_tasks = 0; | |
3605 | ||
e66ecd50 | 3606 | if (cmd->sam_task_attr == MSG_SIMPLE_TAG) { |
c66ac9db NB |
3607 | atomic_dec(&dev->simple_cmds); |
3608 | smp_mb__after_atomic_dec(); | |
3609 | dev->dev_cur_ordered_id++; | |
3610 | DEBUG_STA("Incremented dev->dev_cur_ordered_id: %u for" | |
3611 | " SIMPLE: %u\n", dev->dev_cur_ordered_id, | |
3612 | cmd->se_ordered_id); | |
e66ecd50 | 3613 | } else if (cmd->sam_task_attr == MSG_HEAD_TAG) { |
c66ac9db NB |
3614 | atomic_dec(&dev->dev_hoq_count); |
3615 | smp_mb__after_atomic_dec(); | |
3616 | dev->dev_cur_ordered_id++; | |
3617 | DEBUG_STA("Incremented dev_cur_ordered_id: %u for" | |
3618 | " HEAD_OF_QUEUE: %u\n", dev->dev_cur_ordered_id, | |
3619 | cmd->se_ordered_id); | |
e66ecd50 | 3620 | } else if (cmd->sam_task_attr == MSG_ORDERED_TAG) { |
c66ac9db | 3621 | spin_lock(&dev->ordered_cmd_lock); |
5951146d | 3622 | list_del(&cmd->se_ordered_node); |
c66ac9db NB |
3623 | atomic_dec(&dev->dev_ordered_sync); |
3624 | smp_mb__after_atomic_dec(); | |
3625 | spin_unlock(&dev->ordered_cmd_lock); | |
3626 | ||
3627 | dev->dev_cur_ordered_id++; | |
3628 | DEBUG_STA("Incremented dev_cur_ordered_id: %u for ORDERED:" | |
3629 | " %u\n", dev->dev_cur_ordered_id, cmd->se_ordered_id); | |
3630 | } | |
3631 | /* | |
3632 | * Process all commands up to the last received | |
3633 | * ORDERED task attribute which requires another blocking | |
3634 | * boundary | |
3635 | */ | |
3636 | spin_lock(&dev->delayed_cmd_lock); | |
3637 | list_for_each_entry_safe(cmd_p, cmd_tmp, | |
5951146d | 3638 | &dev->delayed_cmd_list, se_delayed_node) { |
c66ac9db | 3639 | |
5951146d | 3640 | list_del(&cmd_p->se_delayed_node); |
c66ac9db NB |
3641 | spin_unlock(&dev->delayed_cmd_lock); |
3642 | ||
3643 | DEBUG_STA("Calling add_tasks() for" | |
3644 | " cmd_p: 0x%02x Task Attr: 0x%02x" | |
3645 | " Dormant -> Active, se_ordered_id: %u\n", | |
3646 | T_TASK(cmd_p)->t_task_cdb[0], | |
3647 | cmd_p->sam_task_attr, cmd_p->se_ordered_id); | |
3648 | ||
3649 | transport_add_tasks_from_cmd(cmd_p); | |
3650 | new_active_tasks++; | |
3651 | ||
3652 | spin_lock(&dev->delayed_cmd_lock); | |
e66ecd50 | 3653 | if (cmd_p->sam_task_attr == MSG_ORDERED_TAG) |
c66ac9db NB |
3654 | break; |
3655 | } | |
3656 | spin_unlock(&dev->delayed_cmd_lock); | |
3657 | /* | |
3658 | * If new tasks have become active, wake up the transport thread | |
3659 | * to do the processing of the Active tasks. | |
3660 | */ | |
3661 | if (new_active_tasks != 0) | |
e3d6f909 | 3662 | wake_up_interruptible(&dev->dev_queue_obj.thread_wq); |
c66ac9db NB |
3663 | } |
3664 | ||
07bde79a NB |
3665 | static int transport_complete_qf(struct se_cmd *cmd) |
3666 | { | |
3667 | int ret = 0; | |
3668 | ||
3669 | if (cmd->se_cmd_flags & SCF_TRANSPORT_TASK_SENSE) | |
3670 | return cmd->se_tfo->queue_status(cmd); | |
3671 | ||
3672 | switch (cmd->data_direction) { | |
3673 | case DMA_FROM_DEVICE: | |
3674 | ret = cmd->se_tfo->queue_data_in(cmd); | |
3675 | break; | |
3676 | case DMA_TO_DEVICE: | |
ec98f782 | 3677 | if (cmd->t_bidi_data_sg) { |
07bde79a NB |
3678 | ret = cmd->se_tfo->queue_data_in(cmd); |
3679 | if (ret < 0) | |
3680 | return ret; | |
3681 | } | |
3682 | /* Fall through for DMA_TO_DEVICE */ | |
3683 | case DMA_NONE: | |
3684 | ret = cmd->se_tfo->queue_status(cmd); | |
3685 | break; | |
3686 | default: | |
3687 | break; | |
3688 | } | |
3689 | ||
3690 | return ret; | |
3691 | } | |
3692 | ||
3693 | static void transport_handle_queue_full( | |
3694 | struct se_cmd *cmd, | |
3695 | struct se_device *dev, | |
3696 | int (*qf_callback)(struct se_cmd *)) | |
3697 | { | |
3698 | spin_lock_irq(&dev->qf_cmd_lock); | |
3699 | cmd->se_cmd_flags |= SCF_EMULATE_QUEUE_FULL; | |
3700 | cmd->transport_qf_callback = qf_callback; | |
3701 | list_add_tail(&cmd->se_qf_node, &cmd->se_dev->qf_cmd_list); | |
3702 | atomic_inc(&dev->dev_qf_count); | |
3703 | smp_mb__after_atomic_inc(); | |
3704 | spin_unlock_irq(&cmd->se_dev->qf_cmd_lock); | |
3705 | ||
3706 | schedule_work(&cmd->se_dev->qf_work_queue); | |
3707 | } | |
3708 | ||
c66ac9db NB |
3709 | static void transport_generic_complete_ok(struct se_cmd *cmd) |
3710 | { | |
07bde79a | 3711 | int reason = 0, ret; |
c66ac9db NB |
3712 | /* |
3713 | * Check if we need to move delayed/dormant tasks from cmds on the | |
3714 | * delayed execution list after a HEAD_OF_QUEUE or ORDERED Task | |
3715 | * Attribute. | |
3716 | */ | |
5951146d | 3717 | if (cmd->se_dev->dev_task_attr_type == SAM_TASK_ATTR_EMULATED) |
c66ac9db | 3718 | transport_complete_task_attr(cmd); |
07bde79a NB |
3719 | /* |
3720 | * Check to schedule QUEUE_FULL work, or execute an existing | |
3721 | * cmd->transport_qf_callback() | |
3722 | */ | |
3723 | if (atomic_read(&cmd->se_dev->dev_qf_count) != 0) | |
3724 | schedule_work(&cmd->se_dev->qf_work_queue); | |
3725 | ||
3726 | if (cmd->transport_qf_callback) { | |
3727 | ret = cmd->transport_qf_callback(cmd); | |
3728 | if (ret < 0) | |
3729 | goto queue_full; | |
3730 | ||
3731 | cmd->transport_qf_callback = NULL; | |
3732 | goto done; | |
3733 | } | |
c66ac9db NB |
3734 | /* |
3735 | * Check if we need to retrieve a sense buffer from | |
3736 | * the struct se_cmd in question. | |
3737 | */ | |
3738 | if (cmd->se_cmd_flags & SCF_TRANSPORT_TASK_SENSE) { | |
3739 | if (transport_get_sense_data(cmd) < 0) | |
3740 | reason = TCM_NON_EXISTENT_LUN; | |
3741 | ||
3742 | /* | |
3743 | * Only set when an struct se_task->task_scsi_status returned | |
3744 | * a non GOOD status. | |
3745 | */ | |
3746 | if (cmd->scsi_status) { | |
07bde79a | 3747 | ret = transport_send_check_condition_and_sense( |
c66ac9db | 3748 | cmd, reason, 1); |
07bde79a NB |
3749 | if (ret == -EAGAIN) |
3750 | goto queue_full; | |
3751 | ||
c66ac9db NB |
3752 | transport_lun_remove_cmd(cmd); |
3753 | transport_cmd_check_stop_to_fabric(cmd); | |
3754 | return; | |
3755 | } | |
3756 | } | |
3757 | /* | |
25985edc | 3758 | * Check for a callback, used by amongst other things |
c66ac9db NB |
3759 | * XDWRITE_READ_10 emulation. |
3760 | */ | |
3761 | if (cmd->transport_complete_callback) | |
3762 | cmd->transport_complete_callback(cmd); | |
3763 | ||
3764 | switch (cmd->data_direction) { | |
3765 | case DMA_FROM_DEVICE: | |
3766 | spin_lock(&cmd->se_lun->lun_sep_lock); | |
e3d6f909 AG |
3767 | if (cmd->se_lun->lun_sep) { |
3768 | cmd->se_lun->lun_sep->sep_stats.tx_data_octets += | |
c66ac9db NB |
3769 | cmd->data_length; |
3770 | } | |
3771 | spin_unlock(&cmd->se_lun->lun_sep_lock); | |
c66ac9db | 3772 | |
07bde79a NB |
3773 | ret = cmd->se_tfo->queue_data_in(cmd); |
3774 | if (ret == -EAGAIN) | |
3775 | goto queue_full; | |
c66ac9db NB |
3776 | break; |
3777 | case DMA_TO_DEVICE: | |
3778 | spin_lock(&cmd->se_lun->lun_sep_lock); | |
e3d6f909 AG |
3779 | if (cmd->se_lun->lun_sep) { |
3780 | cmd->se_lun->lun_sep->sep_stats.rx_data_octets += | |
c66ac9db NB |
3781 | cmd->data_length; |
3782 | } | |
3783 | spin_unlock(&cmd->se_lun->lun_sep_lock); | |
3784 | /* | |
3785 | * Check if we need to send READ payload for BIDI-COMMAND | |
3786 | */ | |
ec98f782 | 3787 | if (cmd->t_bidi_data_sg) { |
c66ac9db | 3788 | spin_lock(&cmd->se_lun->lun_sep_lock); |
e3d6f909 AG |
3789 | if (cmd->se_lun->lun_sep) { |
3790 | cmd->se_lun->lun_sep->sep_stats.tx_data_octets += | |
c66ac9db NB |
3791 | cmd->data_length; |
3792 | } | |
3793 | spin_unlock(&cmd->se_lun->lun_sep_lock); | |
07bde79a NB |
3794 | ret = cmd->se_tfo->queue_data_in(cmd); |
3795 | if (ret == -EAGAIN) | |
3796 | goto queue_full; | |
c66ac9db NB |
3797 | break; |
3798 | } | |
3799 | /* Fall through for DMA_TO_DEVICE */ | |
3800 | case DMA_NONE: | |
07bde79a NB |
3801 | ret = cmd->se_tfo->queue_status(cmd); |
3802 | if (ret == -EAGAIN) | |
3803 | goto queue_full; | |
c66ac9db NB |
3804 | break; |
3805 | default: | |
3806 | break; | |
3807 | } | |
3808 | ||
07bde79a | 3809 | done: |
c66ac9db NB |
3810 | transport_lun_remove_cmd(cmd); |
3811 | transport_cmd_check_stop_to_fabric(cmd); | |
07bde79a NB |
3812 | return; |
3813 | ||
3814 | queue_full: | |
3815 | printk(KERN_INFO "Handling complete_ok QUEUE_FULL: se_cmd: %p," | |
3816 | " data_direction: %d\n", cmd, cmd->data_direction); | |
3817 | transport_handle_queue_full(cmd, cmd->se_dev, transport_complete_qf); | |
c66ac9db NB |
3818 | } |
3819 | ||
3820 | static void transport_free_dev_tasks(struct se_cmd *cmd) | |
3821 | { | |
3822 | struct se_task *task, *task_tmp; | |
3823 | unsigned long flags; | |
3824 | ||
a1d8b49a | 3825 | spin_lock_irqsave(&cmd->t_state_lock, flags); |
c66ac9db | 3826 | list_for_each_entry_safe(task, task_tmp, |
a1d8b49a | 3827 | &cmd->t_task_list, t_list) { |
c66ac9db NB |
3828 | if (atomic_read(&task->task_active)) |
3829 | continue; | |
3830 | ||
3831 | kfree(task->task_sg_bidi); | |
3832 | kfree(task->task_sg); | |
3833 | ||
3834 | list_del(&task->t_list); | |
3835 | ||
a1d8b49a | 3836 | spin_unlock_irqrestore(&cmd->t_state_lock, flags); |
c66ac9db | 3837 | if (task->se_dev) |
e3d6f909 | 3838 | task->se_dev->transport->free_task(task); |
c66ac9db NB |
3839 | else |
3840 | printk(KERN_ERR "task[%u] - task->se_dev is NULL\n", | |
3841 | task->task_no); | |
a1d8b49a | 3842 | spin_lock_irqsave(&cmd->t_state_lock, flags); |
c66ac9db | 3843 | } |
a1d8b49a | 3844 | spin_unlock_irqrestore(&cmd->t_state_lock, flags); |
c66ac9db NB |
3845 | } |
3846 | ||
3847 | static inline void transport_free_pages(struct se_cmd *cmd) | |
3848 | { | |
ec98f782 | 3849 | struct scatterlist *sg; |
c66ac9db | 3850 | int free_page = 1; |
ec98f782 | 3851 | int count; |
c66ac9db NB |
3852 | |
3853 | if (cmd->se_cmd_flags & SCF_PASSTHROUGH_SG_TO_MEM_NOALLOC) | |
3854 | free_page = 0; | |
3855 | if (cmd->se_dev->transport->do_se_mem_map) | |
3856 | free_page = 0; | |
3857 | ||
ec98f782 | 3858 | for_each_sg(cmd->t_data_sg, sg, cmd->t_data_nents, count) { |
c66ac9db | 3859 | /* |
ec98f782 | 3860 | * Only called if |
c66ac9db NB |
3861 | * SCF_PASSTHROUGH_SG_TO_MEM_NOALLOC is NOT in use, |
3862 | */ | |
3863 | if (free_page) | |
ec98f782 | 3864 | __free_page(sg_page(sg)); |
c66ac9db | 3865 | |
c66ac9db | 3866 | } |
ec98f782 AG |
3867 | if (free_page) |
3868 | kfree(cmd->t_data_sg); | |
3869 | cmd->t_data_sg = NULL; | |
3870 | cmd->t_data_nents = 0; | |
c66ac9db | 3871 | |
ec98f782 | 3872 | for_each_sg(cmd->t_bidi_data_sg, sg, cmd->t_bidi_data_nents, count) { |
5951146d | 3873 | /* |
ec98f782 | 3874 | * Only called if |
5951146d AG |
3875 | * SCF_PASSTHROUGH_SG_TO_MEM_NOALLOC is NOT in use, |
3876 | */ | |
3877 | if (free_page) | |
ec98f782 | 3878 | __free_page(sg_page(sg)); |
c66ac9db | 3879 | |
c66ac9db | 3880 | } |
ec98f782 AG |
3881 | if (free_page) |
3882 | kfree(cmd->t_bidi_data_sg); | |
3883 | cmd->t_bidi_data_sg = NULL; | |
3884 | cmd->t_bidi_data_nents = 0; | |
c66ac9db NB |
3885 | } |
3886 | ||
3887 | static inline void transport_release_tasks(struct se_cmd *cmd) | |
3888 | { | |
3889 | transport_free_dev_tasks(cmd); | |
3890 | } | |
3891 | ||
3892 | static inline int transport_dec_and_check(struct se_cmd *cmd) | |
3893 | { | |
3894 | unsigned long flags; | |
3895 | ||
a1d8b49a AG |
3896 | spin_lock_irqsave(&cmd->t_state_lock, flags); |
3897 | if (atomic_read(&cmd->t_fe_count)) { | |
3898 | if (!(atomic_dec_and_test(&cmd->t_fe_count))) { | |
3899 | spin_unlock_irqrestore(&cmd->t_state_lock, | |
c66ac9db NB |
3900 | flags); |
3901 | return 1; | |
3902 | } | |
3903 | } | |
3904 | ||
a1d8b49a AG |
3905 | if (atomic_read(&cmd->t_se_count)) { |
3906 | if (!(atomic_dec_and_test(&cmd->t_se_count))) { | |
3907 | spin_unlock_irqrestore(&cmd->t_state_lock, | |
c66ac9db NB |
3908 | flags); |
3909 | return 1; | |
3910 | } | |
3911 | } | |
a1d8b49a | 3912 | spin_unlock_irqrestore(&cmd->t_state_lock, flags); |
c66ac9db NB |
3913 | |
3914 | return 0; | |
3915 | } | |
3916 | ||
3917 | static void transport_release_fe_cmd(struct se_cmd *cmd) | |
3918 | { | |
3919 | unsigned long flags; | |
3920 | ||
3921 | if (transport_dec_and_check(cmd)) | |
3922 | return; | |
3923 | ||
a1d8b49a AG |
3924 | spin_lock_irqsave(&cmd->t_state_lock, flags); |
3925 | if (!(atomic_read(&cmd->transport_dev_active))) { | |
3926 | spin_unlock_irqrestore(&cmd->t_state_lock, flags); | |
c66ac9db NB |
3927 | goto free_pages; |
3928 | } | |
a1d8b49a | 3929 | atomic_set(&cmd->transport_dev_active, 0); |
c66ac9db | 3930 | transport_all_task_dev_remove_state(cmd); |
a1d8b49a | 3931 | spin_unlock_irqrestore(&cmd->t_state_lock, flags); |
c66ac9db NB |
3932 | |
3933 | transport_release_tasks(cmd); | |
3934 | free_pages: | |
3935 | transport_free_pages(cmd); | |
3936 | transport_free_se_cmd(cmd); | |
35462975 | 3937 | cmd->se_tfo->release_cmd(cmd); |
c66ac9db NB |
3938 | } |
3939 | ||
35462975 CH |
3940 | static int |
3941 | transport_generic_remove(struct se_cmd *cmd, int session_reinstatement) | |
c66ac9db NB |
3942 | { |
3943 | unsigned long flags; | |
3944 | ||
c66ac9db NB |
3945 | if (transport_dec_and_check(cmd)) { |
3946 | if (session_reinstatement) { | |
a1d8b49a | 3947 | spin_lock_irqsave(&cmd->t_state_lock, flags); |
c66ac9db | 3948 | transport_all_task_dev_remove_state(cmd); |
a1d8b49a | 3949 | spin_unlock_irqrestore(&cmd->t_state_lock, |
c66ac9db NB |
3950 | flags); |
3951 | } | |
3952 | return 1; | |
3953 | } | |
3954 | ||
a1d8b49a AG |
3955 | spin_lock_irqsave(&cmd->t_state_lock, flags); |
3956 | if (!(atomic_read(&cmd->transport_dev_active))) { | |
3957 | spin_unlock_irqrestore(&cmd->t_state_lock, flags); | |
c66ac9db NB |
3958 | goto free_pages; |
3959 | } | |
a1d8b49a | 3960 | atomic_set(&cmd->transport_dev_active, 0); |
c66ac9db | 3961 | transport_all_task_dev_remove_state(cmd); |
a1d8b49a | 3962 | spin_unlock_irqrestore(&cmd->t_state_lock, flags); |
c66ac9db NB |
3963 | |
3964 | transport_release_tasks(cmd); | |
5951146d | 3965 | |
c66ac9db NB |
3966 | free_pages: |
3967 | transport_free_pages(cmd); | |
35462975 | 3968 | transport_release_cmd(cmd); |
c66ac9db NB |
3969 | return 0; |
3970 | } | |
3971 | ||
3972 | /* | |
ec98f782 AG |
3973 | * transport_generic_map_mem_to_cmd - Use fabric-alloced pages instead of |
3974 | * allocating in the core. | |
c66ac9db NB |
3975 | * @cmd: Associated se_cmd descriptor |
3976 | * @mem: SGL style memory for TCM WRITE / READ | |
3977 | * @sg_mem_num: Number of SGL elements | |
3978 | * @mem_bidi_in: SGL style memory for TCM BIDI READ | |
3979 | * @sg_mem_bidi_num: Number of BIDI READ SGL elements | |
3980 | * | |
3981 | * Return: nonzero return cmd was rejected for -ENOMEM or inproper usage | |
3982 | * of parameters. | |
3983 | */ | |
3984 | int transport_generic_map_mem_to_cmd( | |
3985 | struct se_cmd *cmd, | |
5951146d AG |
3986 | struct scatterlist *sgl, |
3987 | u32 sgl_count, | |
3988 | struct scatterlist *sgl_bidi, | |
3989 | u32 sgl_bidi_count) | |
c66ac9db | 3990 | { |
5951146d | 3991 | if (!sgl || !sgl_count) |
c66ac9db | 3992 | return 0; |
c66ac9db | 3993 | |
c66ac9db NB |
3994 | if ((cmd->se_cmd_flags & SCF_SCSI_DATA_SG_IO_CDB) || |
3995 | (cmd->se_cmd_flags & SCF_SCSI_CONTROL_SG_IO_CDB)) { | |
c66ac9db | 3996 | |
ec98f782 AG |
3997 | cmd->t_data_sg = sgl; |
3998 | cmd->t_data_nents = sgl_count; | |
c66ac9db | 3999 | |
ec98f782 AG |
4000 | if (sgl_bidi && sgl_bidi_count) { |
4001 | cmd->t_bidi_data_sg = sgl_bidi; | |
4002 | cmd->t_bidi_data_nents = sgl_bidi_count; | |
c66ac9db NB |
4003 | } |
4004 | cmd->se_cmd_flags |= SCF_PASSTHROUGH_SG_TO_MEM_NOALLOC; | |
c66ac9db NB |
4005 | } |
4006 | ||
4007 | return 0; | |
4008 | } | |
4009 | EXPORT_SYMBOL(transport_generic_map_mem_to_cmd); | |
4010 | ||
c66ac9db NB |
4011 | static int transport_new_cmd_obj(struct se_cmd *cmd) |
4012 | { | |
5951146d | 4013 | struct se_device *dev = cmd->se_dev; |
a1d8b49a AG |
4014 | u32 task_cdbs; |
4015 | u32 rc; | |
ec98f782 | 4016 | int set_counts = 1; |
c66ac9db | 4017 | |
ec98f782 AG |
4018 | /* |
4019 | * Setup any BIDI READ tasks and memory from | |
4020 | * cmd->t_mem_bidi_list so the READ struct se_tasks | |
4021 | * are queued first for the non pSCSI passthrough case. | |
4022 | */ | |
4023 | if (cmd->t_bidi_data_sg && | |
4024 | (dev->transport->transport_type != TRANSPORT_PLUGIN_PHBA_PDEV)) { | |
4025 | rc = transport_allocate_tasks(cmd, | |
4026 | cmd->t_task_lba, | |
4027 | DMA_FROM_DEVICE, | |
4028 | cmd->t_bidi_data_sg, | |
4029 | cmd->t_bidi_data_nents); | |
4030 | if (!rc) { | |
c66ac9db NB |
4031 | cmd->se_cmd_flags |= SCF_SCSI_CDB_EXCEPTION; |
4032 | cmd->scsi_sense_reason = | |
ec98f782 | 4033 | TCM_LOGICAL_UNIT_COMMUNICATION_FAILURE; |
c66ac9db NB |
4034 | return PYX_TRANSPORT_LU_COMM_FAILURE; |
4035 | } | |
ec98f782 AG |
4036 | atomic_inc(&cmd->t_fe_count); |
4037 | atomic_inc(&cmd->t_se_count); | |
4038 | set_counts = 0; | |
4039 | } | |
4040 | /* | |
4041 | * Setup the tasks and memory from cmd->t_mem_list | |
4042 | * Note for BIDI transfers this will contain the WRITE payload | |
4043 | */ | |
4044 | task_cdbs = transport_allocate_tasks(cmd, | |
4045 | cmd->t_task_lba, | |
4046 | cmd->data_direction, | |
4047 | cmd->t_data_sg, | |
4048 | cmd->t_data_nents); | |
4049 | if (!task_cdbs) { | |
4050 | cmd->se_cmd_flags |= SCF_SCSI_CDB_EXCEPTION; | |
4051 | cmd->scsi_sense_reason = | |
4052 | TCM_LOGICAL_UNIT_COMMUNICATION_FAILURE; | |
4053 | return PYX_TRANSPORT_LU_COMM_FAILURE; | |
4054 | } | |
c66ac9db | 4055 | |
ec98f782 AG |
4056 | if (set_counts) { |
4057 | atomic_inc(&cmd->t_fe_count); | |
4058 | atomic_inc(&cmd->t_se_count); | |
c66ac9db NB |
4059 | } |
4060 | ||
ec98f782 AG |
4061 | cmd->t_task_list_num = task_cdbs; |
4062 | ||
a1d8b49a AG |
4063 | atomic_set(&cmd->t_task_cdbs_left, task_cdbs); |
4064 | atomic_set(&cmd->t_task_cdbs_ex_left, task_cdbs); | |
4065 | atomic_set(&cmd->t_task_cdbs_timeout_left, task_cdbs); | |
c66ac9db NB |
4066 | return 0; |
4067 | } | |
4068 | ||
05d1c7c0 AG |
4069 | void *transport_kmap_first_data_page(struct se_cmd *cmd) |
4070 | { | |
ec98f782 | 4071 | struct scatterlist *sg = cmd->t_data_sg; |
05d1c7c0 | 4072 | |
ec98f782 | 4073 | BUG_ON(!sg); |
05d1c7c0 | 4074 | /* |
ec98f782 AG |
4075 | * We need to take into account a possible offset here for fabrics like |
4076 | * tcm_loop who may be using a contig buffer from the SCSI midlayer for | |
4077 | * control CDBs passed as SGLs via transport_generic_map_mem_to_cmd() | |
05d1c7c0 | 4078 | */ |
ec98f782 | 4079 | return kmap(sg_page(sg)) + sg->offset; |
05d1c7c0 AG |
4080 | } |
4081 | EXPORT_SYMBOL(transport_kmap_first_data_page); | |
4082 | ||
4083 | void transport_kunmap_first_data_page(struct se_cmd *cmd) | |
4084 | { | |
ec98f782 | 4085 | kunmap(sg_page(cmd->t_data_sg)); |
05d1c7c0 AG |
4086 | } |
4087 | EXPORT_SYMBOL(transport_kunmap_first_data_page); | |
4088 | ||
c66ac9db | 4089 | static int |
05d1c7c0 | 4090 | transport_generic_get_mem(struct se_cmd *cmd) |
c66ac9db | 4091 | { |
ec98f782 AG |
4092 | u32 length = cmd->data_length; |
4093 | unsigned int nents; | |
4094 | struct page *page; | |
4095 | int i = 0; | |
c66ac9db | 4096 | |
c66ac9db NB |
4097 | /* |
4098 | * If the device uses memory mapping this is enough. | |
4099 | */ | |
4100 | if (cmd->se_dev->transport->do_se_mem_map) | |
4101 | return 0; | |
4102 | ||
ec98f782 AG |
4103 | nents = DIV_ROUND_UP(length, PAGE_SIZE); |
4104 | cmd->t_data_sg = kmalloc(sizeof(struct scatterlist) * nents, GFP_KERNEL); | |
4105 | if (!cmd->t_data_sg) | |
4106 | return -ENOMEM; | |
c66ac9db | 4107 | |
ec98f782 AG |
4108 | cmd->t_data_nents = nents; |
4109 | sg_init_table(cmd->t_data_sg, nents); | |
c66ac9db | 4110 | |
ec98f782 AG |
4111 | while (length) { |
4112 | u32 page_len = min_t(u32, length, PAGE_SIZE); | |
4113 | page = alloc_page(GFP_KERNEL | __GFP_ZERO); | |
4114 | if (!page) | |
4115 | goto out; | |
c66ac9db | 4116 | |
ec98f782 AG |
4117 | sg_set_page(&cmd->t_data_sg[i], page, page_len, 0); |
4118 | length -= page_len; | |
4119 | i++; | |
c66ac9db | 4120 | } |
c66ac9db | 4121 | return 0; |
c66ac9db | 4122 | |
ec98f782 AG |
4123 | out: |
4124 | while (i >= 0) { | |
4125 | __free_page(sg_page(&cmd->t_data_sg[i])); | |
4126 | i--; | |
c66ac9db | 4127 | } |
ec98f782 AG |
4128 | kfree(cmd->t_data_sg); |
4129 | cmd->t_data_sg = NULL; | |
4130 | return -ENOMEM; | |
c66ac9db NB |
4131 | } |
4132 | ||
a1d8b49a AG |
4133 | /* Reduce sectors if they are too long for the device */ |
4134 | static inline sector_t transport_limit_task_sectors( | |
c66ac9db NB |
4135 | struct se_device *dev, |
4136 | unsigned long long lba, | |
a1d8b49a | 4137 | sector_t sectors) |
c66ac9db | 4138 | { |
a1d8b49a | 4139 | sectors = min_t(sector_t, sectors, dev->se_sub_dev->se_dev_attrib.max_sectors); |
c66ac9db | 4140 | |
a1d8b49a AG |
4141 | if (dev->transport->get_device_type(dev) == TYPE_DISK) |
4142 | if ((lba + sectors) > transport_dev_end_lba(dev)) | |
4143 | sectors = ((transport_dev_end_lba(dev) - lba) + 1); | |
c66ac9db | 4144 | |
a1d8b49a | 4145 | return sectors; |
c66ac9db NB |
4146 | } |
4147 | ||
c66ac9db NB |
4148 | |
4149 | /* | |
4150 | * This function can be used by HW target mode drivers to create a linked | |
4151 | * scatterlist from all contiguously allocated struct se_task->task_sg[]. | |
4152 | * This is intended to be called during the completion path by TCM Core | |
4153 | * when struct target_core_fabric_ops->check_task_sg_chaining is enabled. | |
4154 | */ | |
4155 | void transport_do_task_sg_chain(struct se_cmd *cmd) | |
4156 | { | |
ec98f782 AG |
4157 | struct scatterlist *sg_first = NULL; |
4158 | struct scatterlist *sg_prev = NULL; | |
4159 | int sg_prev_nents = 0; | |
4160 | struct scatterlist *sg; | |
c66ac9db | 4161 | struct se_task *task; |
ec98f782 | 4162 | u32 chained_nents = 0; |
c66ac9db NB |
4163 | int i; |
4164 | ||
ec98f782 AG |
4165 | BUG_ON(!cmd->se_tfo->task_sg_chaining); |
4166 | ||
c66ac9db NB |
4167 | /* |
4168 | * Walk the struct se_task list and setup scatterlist chains | |
a1d8b49a | 4169 | * for each contiguously allocated struct se_task->task_sg[]. |
c66ac9db | 4170 | */ |
a1d8b49a | 4171 | list_for_each_entry(task, &cmd->t_task_list, t_list) { |
ec98f782 | 4172 | if (!task->task_sg) |
c66ac9db NB |
4173 | continue; |
4174 | ||
ec98f782 | 4175 | BUG_ON(!task->task_padded_sg); |
c66ac9db | 4176 | |
ec98f782 AG |
4177 | if (!sg_first) { |
4178 | sg_first = task->task_sg; | |
4179 | chained_nents = task->task_sg_num; | |
97868c89 | 4180 | } else { |
ec98f782 AG |
4181 | sg_chain(sg_prev, sg_prev_nents, task->task_sg); |
4182 | chained_nents += task->task_sg_num; | |
97868c89 | 4183 | } |
ec98f782 AG |
4184 | |
4185 | sg_prev = task->task_sg; | |
4186 | sg_prev_nents = task->task_sg_num; | |
c66ac9db NB |
4187 | } |
4188 | /* | |
4189 | * Setup the starting pointer and total t_tasks_sg_linked_no including | |
4190 | * padding SGs for linking and to mark the end. | |
4191 | */ | |
a1d8b49a | 4192 | cmd->t_tasks_sg_chained = sg_first; |
ec98f782 | 4193 | cmd->t_tasks_sg_chained_no = chained_nents; |
c66ac9db | 4194 | |
a1d8b49a AG |
4195 | DEBUG_CMD_M("Setup cmd: %p cmd->t_tasks_sg_chained: %p and" |
4196 | " t_tasks_sg_chained_no: %u\n", cmd, cmd->t_tasks_sg_chained, | |
4197 | cmd->t_tasks_sg_chained_no); | |
c66ac9db | 4198 | |
a1d8b49a AG |
4199 | for_each_sg(cmd->t_tasks_sg_chained, sg, |
4200 | cmd->t_tasks_sg_chained_no, i) { | |
c66ac9db | 4201 | |
5951146d AG |
4202 | DEBUG_CMD_M("SG[%d]: %p page: %p length: %d offset: %d\n", |
4203 | i, sg, sg_page(sg), sg->length, sg->offset); | |
c66ac9db NB |
4204 | if (sg_is_chain(sg)) |
4205 | DEBUG_CMD_M("SG: %p sg_is_chain=1\n", sg); | |
4206 | if (sg_is_last(sg)) | |
4207 | DEBUG_CMD_M("SG: %p sg_is_last=1\n", sg); | |
4208 | } | |
c66ac9db NB |
4209 | } |
4210 | EXPORT_SYMBOL(transport_do_task_sg_chain); | |
4211 | ||
a1d8b49a AG |
4212 | /* |
4213 | * Break up cmd into chunks transport can handle | |
4214 | */ | |
ec98f782 | 4215 | static int transport_allocate_data_tasks( |
c66ac9db NB |
4216 | struct se_cmd *cmd, |
4217 | unsigned long long lba, | |
c66ac9db | 4218 | enum dma_data_direction data_direction, |
ec98f782 AG |
4219 | struct scatterlist *sgl, |
4220 | unsigned int sgl_nents) | |
c66ac9db NB |
4221 | { |
4222 | unsigned char *cdb = NULL; | |
4223 | struct se_task *task; | |
5951146d | 4224 | struct se_device *dev = cmd->se_dev; |
ec98f782 AG |
4225 | unsigned long flags; |
4226 | sector_t sectors; | |
4227 | int task_count; | |
4228 | int i; | |
4229 | sector_t dev_max_sectors = dev->se_sub_dev->se_dev_attrib.max_sectors; | |
4230 | u32 sector_size = dev->se_sub_dev->se_dev_attrib.block_size; | |
4231 | struct scatterlist *sg; | |
4232 | struct scatterlist *cmd_sg; | |
a1d8b49a | 4233 | |
ec98f782 AG |
4234 | WARN_ON(cmd->data_length % sector_size); |
4235 | sectors = DIV_ROUND_UP(cmd->data_length, sector_size); | |
4236 | task_count = DIV_ROUND_UP(sectors, dev_max_sectors); | |
c66ac9db | 4237 | |
ec98f782 AG |
4238 | cmd_sg = sgl; |
4239 | for (i = 0; i < task_count; i++) { | |
4240 | unsigned int task_size; | |
4241 | int count; | |
a1d8b49a | 4242 | |
c66ac9db | 4243 | task = transport_generic_get_task(cmd, data_direction); |
a1d8b49a | 4244 | if (!task) |
ec98f782 | 4245 | return -ENOMEM; |
c66ac9db | 4246 | |
c66ac9db | 4247 | task->task_lba = lba; |
ec98f782 AG |
4248 | task->task_sectors = min(sectors, dev_max_sectors); |
4249 | task->task_size = task->task_sectors * sector_size; | |
c66ac9db | 4250 | |
e3d6f909 | 4251 | cdb = dev->transport->get_cdb(task); |
a1d8b49a AG |
4252 | BUG_ON(!cdb); |
4253 | ||
4254 | memcpy(cdb, cmd->t_task_cdb, | |
4255 | scsi_command_size(cmd->t_task_cdb)); | |
4256 | ||
4257 | /* Update new cdb with updated lba/sectors */ | |
3a867205 | 4258 | cmd->transport_split_cdb(task->task_lba, task->task_sectors, cdb); |
c66ac9db NB |
4259 | |
4260 | /* | |
ec98f782 AG |
4261 | * Check if the fabric module driver is requesting that all |
4262 | * struct se_task->task_sg[] be chained together.. If so, | |
4263 | * then allocate an extra padding SG entry for linking and | |
4264 | * marking the end of the chained SGL. | |
4265 | * Possibly over-allocate task sgl size by using cmd sgl size. | |
4266 | * It's so much easier and only a waste when task_count > 1. | |
4267 | * That is extremely rare. | |
c66ac9db | 4268 | */ |
ec98f782 AG |
4269 | task->task_sg_num = sgl_nents; |
4270 | if (cmd->se_tfo->task_sg_chaining) { | |
4271 | task->task_sg_num++; | |
4272 | task->task_padded_sg = 1; | |
4273 | } | |
c66ac9db | 4274 | |
ec98f782 AG |
4275 | task->task_sg = kmalloc(sizeof(struct scatterlist) * \ |
4276 | task->task_sg_num, GFP_KERNEL); | |
4277 | if (!task->task_sg) { | |
4278 | cmd->se_dev->transport->free_task(task); | |
4279 | return -ENOMEM; | |
4280 | } | |
4281 | ||
4282 | sg_init_table(task->task_sg, task->task_sg_num); | |
c66ac9db | 4283 | |
ec98f782 AG |
4284 | task_size = task->task_size; |
4285 | ||
4286 | /* Build new sgl, only up to task_size */ | |
4287 | for_each_sg(task->task_sg, sg, task->task_sg_num, count) { | |
4288 | if (cmd_sg->length > task_size) | |
4289 | break; | |
4290 | ||
4291 | *sg = *cmd_sg; | |
4292 | task_size -= cmd_sg->length; | |
4293 | cmd_sg = sg_next(cmd_sg); | |
c66ac9db | 4294 | } |
c66ac9db | 4295 | |
ec98f782 AG |
4296 | lba += task->task_sectors; |
4297 | sectors -= task->task_sectors; | |
c66ac9db | 4298 | |
ec98f782 AG |
4299 | spin_lock_irqsave(&cmd->t_state_lock, flags); |
4300 | list_add_tail(&task->t_list, &cmd->t_task_list); | |
4301 | spin_unlock_irqrestore(&cmd->t_state_lock, flags); | |
c66ac9db NB |
4302 | } |
4303 | ||
ec98f782 | 4304 | return task_count; |
c66ac9db NB |
4305 | } |
4306 | ||
4307 | static int | |
ec98f782 | 4308 | transport_allocate_control_task(struct se_cmd *cmd) |
c66ac9db | 4309 | { |
5951146d | 4310 | struct se_device *dev = cmd->se_dev; |
c66ac9db NB |
4311 | unsigned char *cdb; |
4312 | struct se_task *task; | |
ec98f782 | 4313 | unsigned long flags; |
c66ac9db NB |
4314 | |
4315 | task = transport_generic_get_task(cmd, cmd->data_direction); | |
4316 | if (!task) | |
ec98f782 | 4317 | return -ENOMEM; |
c66ac9db | 4318 | |
e3d6f909 | 4319 | cdb = dev->transport->get_cdb(task); |
a1d8b49a AG |
4320 | BUG_ON(!cdb); |
4321 | memcpy(cdb, cmd->t_task_cdb, | |
4322 | scsi_command_size(cmd->t_task_cdb)); | |
c66ac9db | 4323 | |
ec98f782 AG |
4324 | task->task_sg = kmalloc(sizeof(struct scatterlist) * cmd->t_data_nents, |
4325 | GFP_KERNEL); | |
4326 | if (!task->task_sg) { | |
4327 | cmd->se_dev->transport->free_task(task); | |
4328 | return -ENOMEM; | |
4329 | } | |
4330 | ||
4331 | memcpy(task->task_sg, cmd->t_data_sg, | |
4332 | sizeof(struct scatterlist) * cmd->t_data_nents); | |
c66ac9db | 4333 | task->task_size = cmd->data_length; |
ec98f782 | 4334 | task->task_sg_num = cmd->t_data_nents; |
c66ac9db | 4335 | |
ec98f782 AG |
4336 | spin_lock_irqsave(&cmd->t_state_lock, flags); |
4337 | list_add_tail(&task->t_list, &cmd->t_task_list); | |
4338 | spin_unlock_irqrestore(&cmd->t_state_lock, flags); | |
c66ac9db NB |
4339 | |
4340 | if (cmd->se_cmd_flags & SCF_SCSI_CONTROL_SG_IO_CDB) { | |
c66ac9db NB |
4341 | if (dev->transport->map_task_SG) |
4342 | return dev->transport->map_task_SG(task); | |
4343 | return 0; | |
c66ac9db NB |
4344 | } else if (cmd->se_cmd_flags & SCF_SCSI_NON_DATA_CDB) { |
4345 | if (dev->transport->cdb_none) | |
4346 | return dev->transport->cdb_none(task); | |
4347 | return 0; | |
4348 | } else { | |
4349 | BUG(); | |
ec98f782 AG |
4350 | return -ENOMEM; |
4351 | } | |
4352 | } | |
4353 | ||
4354 | static u32 transport_allocate_tasks( | |
4355 | struct se_cmd *cmd, | |
4356 | unsigned long long lba, | |
4357 | enum dma_data_direction data_direction, | |
4358 | struct scatterlist *sgl, | |
4359 | unsigned int sgl_nents) | |
4360 | { | |
4361 | int ret; | |
4362 | ||
4363 | if (cmd->se_cmd_flags & SCF_SCSI_DATA_SG_IO_CDB) { | |
4364 | return transport_allocate_data_tasks(cmd, lba, data_direction, | |
4365 | sgl, sgl_nents); | |
4366 | } else { | |
4367 | ret = transport_allocate_control_task(cmd); | |
4368 | if (ret < 0) | |
4369 | return ret; | |
4370 | else | |
4371 | return 1; | |
c66ac9db NB |
4372 | } |
4373 | } | |
4374 | ||
ec98f782 | 4375 | |
c66ac9db NB |
4376 | /* transport_generic_new_cmd(): Called from transport_processing_thread() |
4377 | * | |
4378 | * Allocate storage transport resources from a set of values predefined | |
4379 | * by transport_generic_cmd_sequencer() from the iSCSI Target RX process. | |
4380 | * Any non zero return here is treated as an "out of resource' op here. | |
4381 | */ | |
4382 | /* | |
4383 | * Generate struct se_task(s) and/or their payloads for this CDB. | |
4384 | */ | |
a1d8b49a | 4385 | int transport_generic_new_cmd(struct se_cmd *cmd) |
c66ac9db | 4386 | { |
c66ac9db | 4387 | struct se_task *task; |
5951146d | 4388 | struct se_device *dev = cmd->se_dev; |
c66ac9db NB |
4389 | int ret = 0; |
4390 | ||
4391 | /* | |
4392 | * Determine is the TCM fabric module has already allocated physical | |
4393 | * memory, and is directly calling transport_generic_map_mem_to_cmd() | |
ec98f782 | 4394 | * beforehand. |
c66ac9db | 4395 | */ |
ec98f782 AG |
4396 | if (!(cmd->se_cmd_flags & SCF_PASSTHROUGH_SG_TO_MEM_NOALLOC) && |
4397 | cmd->data_length) { | |
05d1c7c0 | 4398 | ret = transport_generic_get_mem(cmd); |
c66ac9db NB |
4399 | if (ret < 0) |
4400 | return ret; | |
4401 | } | |
4402 | ||
c66ac9db NB |
4403 | ret = transport_new_cmd_obj(cmd); |
4404 | if (ret < 0) | |
4405 | return ret; | |
4406 | ||
ec98f782 AG |
4407 | list_for_each_entry(task, &cmd->t_task_list, t_list) { |
4408 | if (atomic_read(&task->task_sent)) | |
4409 | continue; | |
4410 | if (!dev->transport->map_task_SG) | |
4411 | continue; | |
c66ac9db | 4412 | |
ec98f782 | 4413 | ret = dev->transport->map_task_SG(task); |
c66ac9db NB |
4414 | if (ret < 0) |
4415 | return ret; | |
4416 | } | |
4417 | ||
4418 | /* | |
a1d8b49a | 4419 | * For WRITEs, let the fabric know its buffer is ready.. |
c66ac9db NB |
4420 | * This WRITE struct se_cmd (and all of its associated struct se_task's) |
4421 | * will be added to the struct se_device execution queue after its WRITE | |
4422 | * data has arrived. (ie: It gets handled by the transport processing | |
4423 | * thread a second time) | |
4424 | */ | |
4425 | if (cmd->data_direction == DMA_TO_DEVICE) { | |
4426 | transport_add_tasks_to_state_queue(cmd); | |
4427 | return transport_generic_write_pending(cmd); | |
4428 | } | |
4429 | /* | |
4430 | * Everything else but a WRITE, add the struct se_cmd's struct se_task's | |
4431 | * to the execution queue. | |
4432 | */ | |
4433 | transport_execute_tasks(cmd); | |
4434 | return 0; | |
4435 | } | |
a1d8b49a | 4436 | EXPORT_SYMBOL(transport_generic_new_cmd); |
c66ac9db NB |
4437 | |
4438 | /* transport_generic_process_write(): | |
4439 | * | |
4440 | * | |
4441 | */ | |
4442 | void transport_generic_process_write(struct se_cmd *cmd) | |
4443 | { | |
4444 | #if 0 | |
4445 | /* | |
4446 | * Copy SCSI Presented DTL sector(s) from received buffers allocated to | |
4447 | * original EDTL | |
4448 | */ | |
4449 | if (cmd->se_cmd_flags & SCF_UNDERFLOW_BIT) { | |
a1d8b49a | 4450 | if (!cmd->t_tasks_se_num) { |
c66ac9db | 4451 | unsigned char *dst, *buf = |
a1d8b49a | 4452 | (unsigned char *)cmd->t_task_buf; |
c66ac9db NB |
4453 | |
4454 | dst = kzalloc(cmd->cmd_spdtl), GFP_KERNEL); | |
4455 | if (!(dst)) { | |
4456 | printk(KERN_ERR "Unable to allocate memory for" | |
4457 | " WRITE underflow\n"); | |
4458 | transport_generic_request_failure(cmd, NULL, | |
4459 | PYX_TRANSPORT_REQ_TOO_MANY_SECTORS, 1); | |
4460 | return; | |
4461 | } | |
4462 | memcpy(dst, buf, cmd->cmd_spdtl); | |
4463 | ||
a1d8b49a AG |
4464 | kfree(cmd->t_task_buf); |
4465 | cmd->t_task_buf = dst; | |
c66ac9db NB |
4466 | } else { |
4467 | struct scatterlist *sg = | |
a1d8b49a | 4468 | (struct scatterlist *sg)cmd->t_task_buf; |
c66ac9db NB |
4469 | struct scatterlist *orig_sg; |
4470 | ||
4471 | orig_sg = kzalloc(sizeof(struct scatterlist) * | |
a1d8b49a | 4472 | cmd->t_tasks_se_num, |
c66ac9db NB |
4473 | GFP_KERNEL))) { |
4474 | if (!(orig_sg)) { | |
4475 | printk(KERN_ERR "Unable to allocate memory" | |
4476 | " for WRITE underflow\n"); | |
4477 | transport_generic_request_failure(cmd, NULL, | |
4478 | PYX_TRANSPORT_REQ_TOO_MANY_SECTORS, 1); | |
4479 | return; | |
4480 | } | |
4481 | ||
a1d8b49a | 4482 | memcpy(orig_sg, cmd->t_task_buf, |
c66ac9db | 4483 | sizeof(struct scatterlist) * |
a1d8b49a | 4484 | cmd->t_tasks_se_num); |
c66ac9db NB |
4485 | |
4486 | cmd->data_length = cmd->cmd_spdtl; | |
4487 | /* | |
4488 | * FIXME, clear out original struct se_task and state | |
4489 | * information. | |
4490 | */ | |
4491 | if (transport_generic_new_cmd(cmd) < 0) { | |
4492 | transport_generic_request_failure(cmd, NULL, | |
4493 | PYX_TRANSPORT_REQ_TOO_MANY_SECTORS, 1); | |
4494 | kfree(orig_sg); | |
4495 | return; | |
4496 | } | |
4497 | ||
4498 | transport_memcpy_write_sg(cmd, orig_sg); | |
4499 | } | |
4500 | } | |
4501 | #endif | |
4502 | transport_execute_tasks(cmd); | |
4503 | } | |
4504 | EXPORT_SYMBOL(transport_generic_process_write); | |
4505 | ||
07bde79a NB |
4506 | static int transport_write_pending_qf(struct se_cmd *cmd) |
4507 | { | |
4508 | return cmd->se_tfo->write_pending(cmd); | |
4509 | } | |
4510 | ||
c66ac9db NB |
4511 | /* transport_generic_write_pending(): |
4512 | * | |
4513 | * | |
4514 | */ | |
4515 | static int transport_generic_write_pending(struct se_cmd *cmd) | |
4516 | { | |
4517 | unsigned long flags; | |
4518 | int ret; | |
4519 | ||
a1d8b49a | 4520 | spin_lock_irqsave(&cmd->t_state_lock, flags); |
c66ac9db | 4521 | cmd->t_state = TRANSPORT_WRITE_PENDING; |
a1d8b49a | 4522 | spin_unlock_irqrestore(&cmd->t_state_lock, flags); |
07bde79a NB |
4523 | |
4524 | if (cmd->transport_qf_callback) { | |
4525 | ret = cmd->transport_qf_callback(cmd); | |
4526 | if (ret == -EAGAIN) | |
4527 | goto queue_full; | |
4528 | else if (ret < 0) | |
4529 | return ret; | |
4530 | ||
4531 | cmd->transport_qf_callback = NULL; | |
4532 | return 0; | |
4533 | } | |
05d1c7c0 | 4534 | |
c66ac9db NB |
4535 | /* |
4536 | * Clear the se_cmd for WRITE_PENDING status in order to set | |
a1d8b49a | 4537 | * cmd->t_transport_active=0 so that transport_generic_handle_data |
c66ac9db | 4538 | * can be called from HW target mode interrupt code. This is safe |
e3d6f909 | 4539 | * to be called with transport_off=1 before the cmd->se_tfo->write_pending |
c66ac9db NB |
4540 | * because the se_cmd->se_lun pointer is not being cleared. |
4541 | */ | |
4542 | transport_cmd_check_stop(cmd, 1, 0); | |
4543 | ||
4544 | /* | |
4545 | * Call the fabric write_pending function here to let the | |
4546 | * frontend know that WRITE buffers are ready. | |
4547 | */ | |
e3d6f909 | 4548 | ret = cmd->se_tfo->write_pending(cmd); |
07bde79a NB |
4549 | if (ret == -EAGAIN) |
4550 | goto queue_full; | |
4551 | else if (ret < 0) | |
c66ac9db NB |
4552 | return ret; |
4553 | ||
4554 | return PYX_TRANSPORT_WRITE_PENDING; | |
07bde79a NB |
4555 | |
4556 | queue_full: | |
4557 | printk(KERN_INFO "Handling write_pending QUEUE__FULL: se_cmd: %p\n", cmd); | |
4558 | cmd->t_state = TRANSPORT_COMPLETE_QF_WP; | |
4559 | transport_handle_queue_full(cmd, cmd->se_dev, | |
4560 | transport_write_pending_qf); | |
4561 | return ret; | |
c66ac9db NB |
4562 | } |
4563 | ||
35462975 | 4564 | void transport_release_cmd(struct se_cmd *cmd) |
c66ac9db | 4565 | { |
e3d6f909 | 4566 | BUG_ON(!cmd->se_tfo); |
c66ac9db NB |
4567 | |
4568 | transport_free_se_cmd(cmd); | |
35462975 | 4569 | cmd->se_tfo->release_cmd(cmd); |
c66ac9db | 4570 | } |
35462975 | 4571 | EXPORT_SYMBOL(transport_release_cmd); |
c66ac9db NB |
4572 | |
4573 | /* transport_generic_free_cmd(): | |
4574 | * | |
4575 | * Called from processing frontend to release storage engine resources | |
4576 | */ | |
4577 | void transport_generic_free_cmd( | |
4578 | struct se_cmd *cmd, | |
4579 | int wait_for_tasks, | |
c66ac9db NB |
4580 | int session_reinstatement) |
4581 | { | |
5951146d | 4582 | if (!(cmd->se_cmd_flags & SCF_SE_LUN_CMD)) |
35462975 | 4583 | transport_release_cmd(cmd); |
c66ac9db NB |
4584 | else { |
4585 | core_dec_lacl_count(cmd->se_sess->se_node_acl, cmd); | |
4586 | ||
e3d6f909 | 4587 | if (cmd->se_lun) { |
c66ac9db NB |
4588 | #if 0 |
4589 | printk(KERN_INFO "cmd: %p ITT: 0x%08x contains" | |
e3d6f909 AG |
4590 | " cmd->se_lun\n", cmd, |
4591 | cmd->se_tfo->get_task_tag(cmd)); | |
c66ac9db NB |
4592 | #endif |
4593 | transport_lun_remove_cmd(cmd); | |
4594 | } | |
4595 | ||
4596 | if (wait_for_tasks && cmd->transport_wait_for_tasks) | |
4597 | cmd->transport_wait_for_tasks(cmd, 0, 0); | |
4598 | ||
f4366772 NB |
4599 | transport_free_dev_tasks(cmd); |
4600 | ||
35462975 | 4601 | transport_generic_remove(cmd, session_reinstatement); |
c66ac9db NB |
4602 | } |
4603 | } | |
4604 | EXPORT_SYMBOL(transport_generic_free_cmd); | |
4605 | ||
4606 | static void transport_nop_wait_for_tasks( | |
4607 | struct se_cmd *cmd, | |
4608 | int remove_cmd, | |
4609 | int session_reinstatement) | |
4610 | { | |
4611 | return; | |
4612 | } | |
4613 | ||
4614 | /* transport_lun_wait_for_tasks(): | |
4615 | * | |
4616 | * Called from ConfigFS context to stop the passed struct se_cmd to allow | |
4617 | * an struct se_lun to be successfully shutdown. | |
4618 | */ | |
4619 | static int transport_lun_wait_for_tasks(struct se_cmd *cmd, struct se_lun *lun) | |
4620 | { | |
4621 | unsigned long flags; | |
4622 | int ret; | |
4623 | /* | |
4624 | * If the frontend has already requested this struct se_cmd to | |
4625 | * be stopped, we can safely ignore this struct se_cmd. | |
4626 | */ | |
a1d8b49a AG |
4627 | spin_lock_irqsave(&cmd->t_state_lock, flags); |
4628 | if (atomic_read(&cmd->t_transport_stop)) { | |
4629 | atomic_set(&cmd->transport_lun_stop, 0); | |
c66ac9db | 4630 | DEBUG_TRANSPORT_S("ConfigFS ITT[0x%08x] - t_transport_stop ==" |
e3d6f909 | 4631 | " TRUE, skipping\n", cmd->se_tfo->get_task_tag(cmd)); |
a1d8b49a | 4632 | spin_unlock_irqrestore(&cmd->t_state_lock, flags); |
c66ac9db | 4633 | transport_cmd_check_stop(cmd, 1, 0); |
e3d6f909 | 4634 | return -EPERM; |
c66ac9db | 4635 | } |
a1d8b49a AG |
4636 | atomic_set(&cmd->transport_lun_fe_stop, 1); |
4637 | spin_unlock_irqrestore(&cmd->t_state_lock, flags); | |
c66ac9db | 4638 | |
5951146d | 4639 | wake_up_interruptible(&cmd->se_dev->dev_queue_obj.thread_wq); |
c66ac9db NB |
4640 | |
4641 | ret = transport_stop_tasks_for_cmd(cmd); | |
4642 | ||
4643 | DEBUG_TRANSPORT_S("ConfigFS: cmd: %p t_task_cdbs: %d stop tasks ret:" | |
a1d8b49a | 4644 | " %d\n", cmd, cmd->t_task_cdbs, ret); |
c66ac9db NB |
4645 | if (!ret) { |
4646 | DEBUG_TRANSPORT_S("ConfigFS: ITT[0x%08x] - stopping cmd....\n", | |
e3d6f909 | 4647 | cmd->se_tfo->get_task_tag(cmd)); |
a1d8b49a | 4648 | wait_for_completion(&cmd->transport_lun_stop_comp); |
c66ac9db | 4649 | DEBUG_TRANSPORT_S("ConfigFS: ITT[0x%08x] - stopped cmd....\n", |
e3d6f909 | 4650 | cmd->se_tfo->get_task_tag(cmd)); |
c66ac9db | 4651 | } |
5951146d | 4652 | transport_remove_cmd_from_queue(cmd, &cmd->se_dev->dev_queue_obj); |
c66ac9db NB |
4653 | |
4654 | return 0; | |
4655 | } | |
4656 | ||
4657 | /* #define DEBUG_CLEAR_LUN */ | |
4658 | #ifdef DEBUG_CLEAR_LUN | |
4659 | #define DEBUG_CLEAR_L(x...) printk(KERN_INFO x) | |
4660 | #else | |
4661 | #define DEBUG_CLEAR_L(x...) | |
4662 | #endif | |
4663 | ||
4664 | static void __transport_clear_lun_from_sessions(struct se_lun *lun) | |
4665 | { | |
4666 | struct se_cmd *cmd = NULL; | |
4667 | unsigned long lun_flags, cmd_flags; | |
4668 | /* | |
4669 | * Do exception processing and return CHECK_CONDITION status to the | |
4670 | * Initiator Port. | |
4671 | */ | |
4672 | spin_lock_irqsave(&lun->lun_cmd_lock, lun_flags); | |
5951146d AG |
4673 | while (!list_empty(&lun->lun_cmd_list)) { |
4674 | cmd = list_first_entry(&lun->lun_cmd_list, | |
4675 | struct se_cmd, se_lun_node); | |
4676 | list_del(&cmd->se_lun_node); | |
4677 | ||
a1d8b49a | 4678 | atomic_set(&cmd->transport_lun_active, 0); |
c66ac9db NB |
4679 | /* |
4680 | * This will notify iscsi_target_transport.c: | |
4681 | * transport_cmd_check_stop() that a LUN shutdown is in | |
4682 | * progress for the iscsi_cmd_t. | |
4683 | */ | |
a1d8b49a AG |
4684 | spin_lock(&cmd->t_state_lock); |
4685 | DEBUG_CLEAR_L("SE_LUN[%d] - Setting cmd->transport" | |
c66ac9db | 4686 | "_lun_stop for ITT: 0x%08x\n", |
e3d6f909 AG |
4687 | cmd->se_lun->unpacked_lun, |
4688 | cmd->se_tfo->get_task_tag(cmd)); | |
a1d8b49a AG |
4689 | atomic_set(&cmd->transport_lun_stop, 1); |
4690 | spin_unlock(&cmd->t_state_lock); | |
c66ac9db NB |
4691 | |
4692 | spin_unlock_irqrestore(&lun->lun_cmd_lock, lun_flags); | |
4693 | ||
e3d6f909 | 4694 | if (!(cmd->se_lun)) { |
c66ac9db | 4695 | printk(KERN_ERR "ITT: 0x%08x, [i,t]_state: %u/%u\n", |
e3d6f909 AG |
4696 | cmd->se_tfo->get_task_tag(cmd), |
4697 | cmd->se_tfo->get_cmd_state(cmd), cmd->t_state); | |
c66ac9db NB |
4698 | BUG(); |
4699 | } | |
4700 | /* | |
4701 | * If the Storage engine still owns the iscsi_cmd_t, determine | |
4702 | * and/or stop its context. | |
4703 | */ | |
4704 | DEBUG_CLEAR_L("SE_LUN[%d] - ITT: 0x%08x before transport" | |
e3d6f909 AG |
4705 | "_lun_wait_for_tasks()\n", cmd->se_lun->unpacked_lun, |
4706 | cmd->se_tfo->get_task_tag(cmd)); | |
c66ac9db | 4707 | |
e3d6f909 | 4708 | if (transport_lun_wait_for_tasks(cmd, cmd->se_lun) < 0) { |
c66ac9db NB |
4709 | spin_lock_irqsave(&lun->lun_cmd_lock, lun_flags); |
4710 | continue; | |
4711 | } | |
4712 | ||
4713 | DEBUG_CLEAR_L("SE_LUN[%d] - ITT: 0x%08x after transport_lun" | |
4714 | "_wait_for_tasks(): SUCCESS\n", | |
e3d6f909 AG |
4715 | cmd->se_lun->unpacked_lun, |
4716 | cmd->se_tfo->get_task_tag(cmd)); | |
c66ac9db | 4717 | |
a1d8b49a AG |
4718 | spin_lock_irqsave(&cmd->t_state_lock, cmd_flags); |
4719 | if (!(atomic_read(&cmd->transport_dev_active))) { | |
4720 | spin_unlock_irqrestore(&cmd->t_state_lock, cmd_flags); | |
c66ac9db NB |
4721 | goto check_cond; |
4722 | } | |
a1d8b49a | 4723 | atomic_set(&cmd->transport_dev_active, 0); |
c66ac9db | 4724 | transport_all_task_dev_remove_state(cmd); |
a1d8b49a | 4725 | spin_unlock_irqrestore(&cmd->t_state_lock, cmd_flags); |
c66ac9db NB |
4726 | |
4727 | transport_free_dev_tasks(cmd); | |
4728 | /* | |
4729 | * The Storage engine stopped this struct se_cmd before it was | |
4730 | * send to the fabric frontend for delivery back to the | |
4731 | * Initiator Node. Return this SCSI CDB back with an | |
4732 | * CHECK_CONDITION status. | |
4733 | */ | |
4734 | check_cond: | |
4735 | transport_send_check_condition_and_sense(cmd, | |
4736 | TCM_NON_EXISTENT_LUN, 0); | |
4737 | /* | |
4738 | * If the fabric frontend is waiting for this iscsi_cmd_t to | |
4739 | * be released, notify the waiting thread now that LU has | |
4740 | * finished accessing it. | |
4741 | */ | |
a1d8b49a AG |
4742 | spin_lock_irqsave(&cmd->t_state_lock, cmd_flags); |
4743 | if (atomic_read(&cmd->transport_lun_fe_stop)) { | |
c66ac9db NB |
4744 | DEBUG_CLEAR_L("SE_LUN[%d] - Detected FE stop for" |
4745 | " struct se_cmd: %p ITT: 0x%08x\n", | |
4746 | lun->unpacked_lun, | |
e3d6f909 | 4747 | cmd, cmd->se_tfo->get_task_tag(cmd)); |
c66ac9db | 4748 | |
a1d8b49a | 4749 | spin_unlock_irqrestore(&cmd->t_state_lock, |
c66ac9db NB |
4750 | cmd_flags); |
4751 | transport_cmd_check_stop(cmd, 1, 0); | |
a1d8b49a | 4752 | complete(&cmd->transport_lun_fe_stop_comp); |
c66ac9db NB |
4753 | spin_lock_irqsave(&lun->lun_cmd_lock, lun_flags); |
4754 | continue; | |
4755 | } | |
4756 | DEBUG_CLEAR_L("SE_LUN[%d] - ITT: 0x%08x finished processing\n", | |
e3d6f909 | 4757 | lun->unpacked_lun, cmd->se_tfo->get_task_tag(cmd)); |
c66ac9db | 4758 | |
a1d8b49a | 4759 | spin_unlock_irqrestore(&cmd->t_state_lock, cmd_flags); |
c66ac9db NB |
4760 | spin_lock_irqsave(&lun->lun_cmd_lock, lun_flags); |
4761 | } | |
4762 | spin_unlock_irqrestore(&lun->lun_cmd_lock, lun_flags); | |
4763 | } | |
4764 | ||
4765 | static int transport_clear_lun_thread(void *p) | |
4766 | { | |
4767 | struct se_lun *lun = (struct se_lun *)p; | |
4768 | ||
4769 | __transport_clear_lun_from_sessions(lun); | |
4770 | complete(&lun->lun_shutdown_comp); | |
4771 | ||
4772 | return 0; | |
4773 | } | |
4774 | ||
4775 | int transport_clear_lun_from_sessions(struct se_lun *lun) | |
4776 | { | |
4777 | struct task_struct *kt; | |
4778 | ||
5951146d | 4779 | kt = kthread_run(transport_clear_lun_thread, lun, |
c66ac9db NB |
4780 | "tcm_cl_%u", lun->unpacked_lun); |
4781 | if (IS_ERR(kt)) { | |
4782 | printk(KERN_ERR "Unable to start clear_lun thread\n"); | |
e3d6f909 | 4783 | return PTR_ERR(kt); |
c66ac9db NB |
4784 | } |
4785 | wait_for_completion(&lun->lun_shutdown_comp); | |
4786 | ||
4787 | return 0; | |
4788 | } | |
4789 | ||
4790 | /* transport_generic_wait_for_tasks(): | |
4791 | * | |
4792 | * Called from frontend or passthrough context to wait for storage engine | |
4793 | * to pause and/or release frontend generated struct se_cmd. | |
4794 | */ | |
4795 | static void transport_generic_wait_for_tasks( | |
4796 | struct se_cmd *cmd, | |
4797 | int remove_cmd, | |
4798 | int session_reinstatement) | |
4799 | { | |
4800 | unsigned long flags; | |
4801 | ||
4802 | if (!(cmd->se_cmd_flags & SCF_SE_LUN_CMD) && !(cmd->se_tmr_req)) | |
4803 | return; | |
4804 | ||
a1d8b49a | 4805 | spin_lock_irqsave(&cmd->t_state_lock, flags); |
c66ac9db NB |
4806 | /* |
4807 | * If we are already stopped due to an external event (ie: LUN shutdown) | |
4808 | * sleep until the connection can have the passed struct se_cmd back. | |
a1d8b49a | 4809 | * The cmd->transport_lun_stopped_sem will be upped by |
c66ac9db NB |
4810 | * transport_clear_lun_from_sessions() once the ConfigFS context caller |
4811 | * has completed its operation on the struct se_cmd. | |
4812 | */ | |
a1d8b49a | 4813 | if (atomic_read(&cmd->transport_lun_stop)) { |
c66ac9db NB |
4814 | |
4815 | DEBUG_TRANSPORT_S("wait_for_tasks: Stopping" | |
e3d6f909 | 4816 | " wait_for_completion(&cmd->t_tasktransport_lun_fe" |
c66ac9db | 4817 | "_stop_comp); for ITT: 0x%08x\n", |
e3d6f909 | 4818 | cmd->se_tfo->get_task_tag(cmd)); |
c66ac9db NB |
4819 | /* |
4820 | * There is a special case for WRITES where a FE exception + | |
4821 | * LUN shutdown means ConfigFS context is still sleeping on | |
4822 | * transport_lun_stop_comp in transport_lun_wait_for_tasks(). | |
4823 | * We go ahead and up transport_lun_stop_comp just to be sure | |
4824 | * here. | |
4825 | */ | |
a1d8b49a AG |
4826 | spin_unlock_irqrestore(&cmd->t_state_lock, flags); |
4827 | complete(&cmd->transport_lun_stop_comp); | |
4828 | wait_for_completion(&cmd->transport_lun_fe_stop_comp); | |
4829 | spin_lock_irqsave(&cmd->t_state_lock, flags); | |
c66ac9db NB |
4830 | |
4831 | transport_all_task_dev_remove_state(cmd); | |
4832 | /* | |
4833 | * At this point, the frontend who was the originator of this | |
4834 | * struct se_cmd, now owns the structure and can be released through | |
4835 | * normal means below. | |
4836 | */ | |
4837 | DEBUG_TRANSPORT_S("wait_for_tasks: Stopped" | |
e3d6f909 | 4838 | " wait_for_completion(&cmd->t_tasktransport_lun_fe_" |
c66ac9db | 4839 | "stop_comp); for ITT: 0x%08x\n", |
e3d6f909 | 4840 | cmd->se_tfo->get_task_tag(cmd)); |
c66ac9db | 4841 | |
a1d8b49a | 4842 | atomic_set(&cmd->transport_lun_stop, 0); |
c66ac9db | 4843 | } |
a1d8b49a AG |
4844 | if (!atomic_read(&cmd->t_transport_active) || |
4845 | atomic_read(&cmd->t_transport_aborted)) | |
c66ac9db NB |
4846 | goto remove; |
4847 | ||
a1d8b49a | 4848 | atomic_set(&cmd->t_transport_stop, 1); |
c66ac9db NB |
4849 | |
4850 | DEBUG_TRANSPORT_S("wait_for_tasks: Stopping %p ITT: 0x%08x" | |
4851 | " i_state: %d, t_state/def_t_state: %d/%d, t_transport_stop" | |
e3d6f909 AG |
4852 | " = TRUE\n", cmd, cmd->se_tfo->get_task_tag(cmd), |
4853 | cmd->se_tfo->get_cmd_state(cmd), cmd->t_state, | |
c66ac9db NB |
4854 | cmd->deferred_t_state); |
4855 | ||
a1d8b49a | 4856 | spin_unlock_irqrestore(&cmd->t_state_lock, flags); |
c66ac9db | 4857 | |
5951146d | 4858 | wake_up_interruptible(&cmd->se_dev->dev_queue_obj.thread_wq); |
c66ac9db | 4859 | |
a1d8b49a | 4860 | wait_for_completion(&cmd->t_transport_stop_comp); |
c66ac9db | 4861 | |
a1d8b49a AG |
4862 | spin_lock_irqsave(&cmd->t_state_lock, flags); |
4863 | atomic_set(&cmd->t_transport_active, 0); | |
4864 | atomic_set(&cmd->t_transport_stop, 0); | |
c66ac9db NB |
4865 | |
4866 | DEBUG_TRANSPORT_S("wait_for_tasks: Stopped wait_for_compltion(" | |
a1d8b49a | 4867 | "&cmd->t_transport_stop_comp) for ITT: 0x%08x\n", |
e3d6f909 | 4868 | cmd->se_tfo->get_task_tag(cmd)); |
c66ac9db | 4869 | remove: |
a1d8b49a | 4870 | spin_unlock_irqrestore(&cmd->t_state_lock, flags); |
c66ac9db NB |
4871 | if (!remove_cmd) |
4872 | return; | |
4873 | ||
35462975 | 4874 | transport_generic_free_cmd(cmd, 0, session_reinstatement); |
c66ac9db NB |
4875 | } |
4876 | ||
4877 | static int transport_get_sense_codes( | |
4878 | struct se_cmd *cmd, | |
4879 | u8 *asc, | |
4880 | u8 *ascq) | |
4881 | { | |
4882 | *asc = cmd->scsi_asc; | |
4883 | *ascq = cmd->scsi_ascq; | |
4884 | ||
4885 | return 0; | |
4886 | } | |
4887 | ||
4888 | static int transport_set_sense_codes( | |
4889 | struct se_cmd *cmd, | |
4890 | u8 asc, | |
4891 | u8 ascq) | |
4892 | { | |
4893 | cmd->scsi_asc = asc; | |
4894 | cmd->scsi_ascq = ascq; | |
4895 | ||
4896 | return 0; | |
4897 | } | |
4898 | ||
4899 | int transport_send_check_condition_and_sense( | |
4900 | struct se_cmd *cmd, | |
4901 | u8 reason, | |
4902 | int from_transport) | |
4903 | { | |
4904 | unsigned char *buffer = cmd->sense_buffer; | |
4905 | unsigned long flags; | |
4906 | int offset; | |
4907 | u8 asc = 0, ascq = 0; | |
4908 | ||
a1d8b49a | 4909 | spin_lock_irqsave(&cmd->t_state_lock, flags); |
c66ac9db | 4910 | if (cmd->se_cmd_flags & SCF_SENT_CHECK_CONDITION) { |
a1d8b49a | 4911 | spin_unlock_irqrestore(&cmd->t_state_lock, flags); |
c66ac9db NB |
4912 | return 0; |
4913 | } | |
4914 | cmd->se_cmd_flags |= SCF_SENT_CHECK_CONDITION; | |
a1d8b49a | 4915 | spin_unlock_irqrestore(&cmd->t_state_lock, flags); |
c66ac9db NB |
4916 | |
4917 | if (!reason && from_transport) | |
4918 | goto after_reason; | |
4919 | ||
4920 | if (!from_transport) | |
4921 | cmd->se_cmd_flags |= SCF_EMULATED_TASK_SENSE; | |
4922 | /* | |
4923 | * Data Segment and SenseLength of the fabric response PDU. | |
4924 | * | |
4925 | * TRANSPORT_SENSE_BUFFER is now set to SCSI_SENSE_BUFFERSIZE | |
4926 | * from include/scsi/scsi_cmnd.h | |
4927 | */ | |
e3d6f909 | 4928 | offset = cmd->se_tfo->set_fabric_sense_len(cmd, |
c66ac9db NB |
4929 | TRANSPORT_SENSE_BUFFER); |
4930 | /* | |
4931 | * Actual SENSE DATA, see SPC-3 7.23.2 SPC_SENSE_KEY_OFFSET uses | |
4932 | * SENSE KEY values from include/scsi/scsi.h | |
4933 | */ | |
4934 | switch (reason) { | |
4935 | case TCM_NON_EXISTENT_LUN: | |
4936 | case TCM_UNSUPPORTED_SCSI_OPCODE: | |
4937 | case TCM_SECTOR_COUNT_TOO_MANY: | |
4938 | /* CURRENT ERROR */ | |
4939 | buffer[offset] = 0x70; | |
4940 | /* ILLEGAL REQUEST */ | |
4941 | buffer[offset+SPC_SENSE_KEY_OFFSET] = ILLEGAL_REQUEST; | |
4942 | /* INVALID COMMAND OPERATION CODE */ | |
4943 | buffer[offset+SPC_ASC_KEY_OFFSET] = 0x20; | |
4944 | break; | |
4945 | case TCM_UNKNOWN_MODE_PAGE: | |
4946 | /* CURRENT ERROR */ | |
4947 | buffer[offset] = 0x70; | |
4948 | /* ILLEGAL REQUEST */ | |
4949 | buffer[offset+SPC_SENSE_KEY_OFFSET] = ILLEGAL_REQUEST; | |
4950 | /* INVALID FIELD IN CDB */ | |
4951 | buffer[offset+SPC_ASC_KEY_OFFSET] = 0x24; | |
4952 | break; | |
4953 | case TCM_CHECK_CONDITION_ABORT_CMD: | |
4954 | /* CURRENT ERROR */ | |
4955 | buffer[offset] = 0x70; | |
4956 | /* ABORTED COMMAND */ | |
4957 | buffer[offset+SPC_SENSE_KEY_OFFSET] = ABORTED_COMMAND; | |
4958 | /* BUS DEVICE RESET FUNCTION OCCURRED */ | |
4959 | buffer[offset+SPC_ASC_KEY_OFFSET] = 0x29; | |
4960 | buffer[offset+SPC_ASCQ_KEY_OFFSET] = 0x03; | |
4961 | break; | |
4962 | case TCM_INCORRECT_AMOUNT_OF_DATA: | |
4963 | /* CURRENT ERROR */ | |
4964 | buffer[offset] = 0x70; | |
4965 | /* ABORTED COMMAND */ | |
4966 | buffer[offset+SPC_SENSE_KEY_OFFSET] = ABORTED_COMMAND; | |
4967 | /* WRITE ERROR */ | |
4968 | buffer[offset+SPC_ASC_KEY_OFFSET] = 0x0c; | |
4969 | /* NOT ENOUGH UNSOLICITED DATA */ | |
4970 | buffer[offset+SPC_ASCQ_KEY_OFFSET] = 0x0d; | |
4971 | break; | |
4972 | case TCM_INVALID_CDB_FIELD: | |
4973 | /* CURRENT ERROR */ | |
4974 | buffer[offset] = 0x70; | |
4975 | /* ABORTED COMMAND */ | |
4976 | buffer[offset+SPC_SENSE_KEY_OFFSET] = ABORTED_COMMAND; | |
4977 | /* INVALID FIELD IN CDB */ | |
4978 | buffer[offset+SPC_ASC_KEY_OFFSET] = 0x24; | |
4979 | break; | |
4980 | case TCM_INVALID_PARAMETER_LIST: | |
4981 | /* CURRENT ERROR */ | |
4982 | buffer[offset] = 0x70; | |
4983 | /* ABORTED COMMAND */ | |
4984 | buffer[offset+SPC_SENSE_KEY_OFFSET] = ABORTED_COMMAND; | |
4985 | /* INVALID FIELD IN PARAMETER LIST */ | |
4986 | buffer[offset+SPC_ASC_KEY_OFFSET] = 0x26; | |
4987 | break; | |
4988 | case TCM_UNEXPECTED_UNSOLICITED_DATA: | |
4989 | /* CURRENT ERROR */ | |
4990 | buffer[offset] = 0x70; | |
4991 | /* ABORTED COMMAND */ | |
4992 | buffer[offset+SPC_SENSE_KEY_OFFSET] = ABORTED_COMMAND; | |
4993 | /* WRITE ERROR */ | |
4994 | buffer[offset+SPC_ASC_KEY_OFFSET] = 0x0c; | |
4995 | /* UNEXPECTED_UNSOLICITED_DATA */ | |
4996 | buffer[offset+SPC_ASCQ_KEY_OFFSET] = 0x0c; | |
4997 | break; | |
4998 | case TCM_SERVICE_CRC_ERROR: | |
4999 | /* CURRENT ERROR */ | |
5000 | buffer[offset] = 0x70; | |
5001 | /* ABORTED COMMAND */ | |
5002 | buffer[offset+SPC_SENSE_KEY_OFFSET] = ABORTED_COMMAND; | |
5003 | /* PROTOCOL SERVICE CRC ERROR */ | |
5004 | buffer[offset+SPC_ASC_KEY_OFFSET] = 0x47; | |
5005 | /* N/A */ | |
5006 | buffer[offset+SPC_ASCQ_KEY_OFFSET] = 0x05; | |
5007 | break; | |
5008 | case TCM_SNACK_REJECTED: | |
5009 | /* CURRENT ERROR */ | |
5010 | buffer[offset] = 0x70; | |
5011 | /* ABORTED COMMAND */ | |
5012 | buffer[offset+SPC_SENSE_KEY_OFFSET] = ABORTED_COMMAND; | |
5013 | /* READ ERROR */ | |
5014 | buffer[offset+SPC_ASC_KEY_OFFSET] = 0x11; | |
5015 | /* FAILED RETRANSMISSION REQUEST */ | |
5016 | buffer[offset+SPC_ASCQ_KEY_OFFSET] = 0x13; | |
5017 | break; | |
5018 | case TCM_WRITE_PROTECTED: | |
5019 | /* CURRENT ERROR */ | |
5020 | buffer[offset] = 0x70; | |
5021 | /* DATA PROTECT */ | |
5022 | buffer[offset+SPC_SENSE_KEY_OFFSET] = DATA_PROTECT; | |
5023 | /* WRITE PROTECTED */ | |
5024 | buffer[offset+SPC_ASC_KEY_OFFSET] = 0x27; | |
5025 | break; | |
5026 | case TCM_CHECK_CONDITION_UNIT_ATTENTION: | |
5027 | /* CURRENT ERROR */ | |
5028 | buffer[offset] = 0x70; | |
5029 | /* UNIT ATTENTION */ | |
5030 | buffer[offset+SPC_SENSE_KEY_OFFSET] = UNIT_ATTENTION; | |
5031 | core_scsi3_ua_for_check_condition(cmd, &asc, &ascq); | |
5032 | buffer[offset+SPC_ASC_KEY_OFFSET] = asc; | |
5033 | buffer[offset+SPC_ASCQ_KEY_OFFSET] = ascq; | |
5034 | break; | |
5035 | case TCM_CHECK_CONDITION_NOT_READY: | |
5036 | /* CURRENT ERROR */ | |
5037 | buffer[offset] = 0x70; | |
5038 | /* Not Ready */ | |
5039 | buffer[offset+SPC_SENSE_KEY_OFFSET] = NOT_READY; | |
5040 | transport_get_sense_codes(cmd, &asc, &ascq); | |
5041 | buffer[offset+SPC_ASC_KEY_OFFSET] = asc; | |
5042 | buffer[offset+SPC_ASCQ_KEY_OFFSET] = ascq; | |
5043 | break; | |
5044 | case TCM_LOGICAL_UNIT_COMMUNICATION_FAILURE: | |
5045 | default: | |
5046 | /* CURRENT ERROR */ | |
5047 | buffer[offset] = 0x70; | |
5048 | /* ILLEGAL REQUEST */ | |
5049 | buffer[offset+SPC_SENSE_KEY_OFFSET] = ILLEGAL_REQUEST; | |
5050 | /* LOGICAL UNIT COMMUNICATION FAILURE */ | |
5051 | buffer[offset+SPC_ASC_KEY_OFFSET] = 0x80; | |
5052 | break; | |
5053 | } | |
5054 | /* | |
5055 | * This code uses linux/include/scsi/scsi.h SAM status codes! | |
5056 | */ | |
5057 | cmd->scsi_status = SAM_STAT_CHECK_CONDITION; | |
5058 | /* | |
5059 | * Automatically padded, this value is encoded in the fabric's | |
5060 | * data_length response PDU containing the SCSI defined sense data. | |
5061 | */ | |
5062 | cmd->scsi_sense_length = TRANSPORT_SENSE_BUFFER + offset; | |
5063 | ||
5064 | after_reason: | |
07bde79a | 5065 | return cmd->se_tfo->queue_status(cmd); |
c66ac9db NB |
5066 | } |
5067 | EXPORT_SYMBOL(transport_send_check_condition_and_sense); | |
5068 | ||
5069 | int transport_check_aborted_status(struct se_cmd *cmd, int send_status) | |
5070 | { | |
5071 | int ret = 0; | |
5072 | ||
a1d8b49a | 5073 | if (atomic_read(&cmd->t_transport_aborted) != 0) { |
c66ac9db NB |
5074 | if (!(send_status) || |
5075 | (cmd->se_cmd_flags & SCF_SENT_DELAYED_TAS)) | |
5076 | return 1; | |
5077 | #if 0 | |
5078 | printk(KERN_INFO "Sending delayed SAM_STAT_TASK_ABORTED" | |
5079 | " status for CDB: 0x%02x ITT: 0x%08x\n", | |
a1d8b49a | 5080 | cmd->t_task_cdb[0], |
e3d6f909 | 5081 | cmd->se_tfo->get_task_tag(cmd)); |
c66ac9db NB |
5082 | #endif |
5083 | cmd->se_cmd_flags |= SCF_SENT_DELAYED_TAS; | |
e3d6f909 | 5084 | cmd->se_tfo->queue_status(cmd); |
c66ac9db NB |
5085 | ret = 1; |
5086 | } | |
5087 | return ret; | |
5088 | } | |
5089 | EXPORT_SYMBOL(transport_check_aborted_status); | |
5090 | ||
5091 | void transport_send_task_abort(struct se_cmd *cmd) | |
5092 | { | |
5093 | /* | |
5094 | * If there are still expected incoming fabric WRITEs, we wait | |
5095 | * until until they have completed before sending a TASK_ABORTED | |
5096 | * response. This response with TASK_ABORTED status will be | |
5097 | * queued back to fabric module by transport_check_aborted_status(). | |
5098 | */ | |
5099 | if (cmd->data_direction == DMA_TO_DEVICE) { | |
e3d6f909 | 5100 | if (cmd->se_tfo->write_pending_status(cmd) != 0) { |
a1d8b49a | 5101 | atomic_inc(&cmd->t_transport_aborted); |
c66ac9db NB |
5102 | smp_mb__after_atomic_inc(); |
5103 | cmd->scsi_status = SAM_STAT_TASK_ABORTED; | |
5104 | transport_new_cmd_failure(cmd); | |
5105 | return; | |
5106 | } | |
5107 | } | |
5108 | cmd->scsi_status = SAM_STAT_TASK_ABORTED; | |
5109 | #if 0 | |
5110 | printk(KERN_INFO "Setting SAM_STAT_TASK_ABORTED status for CDB: 0x%02x," | |
a1d8b49a | 5111 | " ITT: 0x%08x\n", cmd->t_task_cdb[0], |
e3d6f909 | 5112 | cmd->se_tfo->get_task_tag(cmd)); |
c66ac9db | 5113 | #endif |
e3d6f909 | 5114 | cmd->se_tfo->queue_status(cmd); |
c66ac9db NB |
5115 | } |
5116 | ||
5117 | /* transport_generic_do_tmr(): | |
5118 | * | |
5119 | * | |
5120 | */ | |
5121 | int transport_generic_do_tmr(struct se_cmd *cmd) | |
5122 | { | |
5951146d | 5123 | struct se_device *dev = cmd->se_dev; |
c66ac9db NB |
5124 | struct se_tmr_req *tmr = cmd->se_tmr_req; |
5125 | int ret; | |
5126 | ||
5127 | switch (tmr->function) { | |
5c6cd613 | 5128 | case TMR_ABORT_TASK: |
c66ac9db NB |
5129 | tmr->response = TMR_FUNCTION_REJECTED; |
5130 | break; | |
5c6cd613 NB |
5131 | case TMR_ABORT_TASK_SET: |
5132 | case TMR_CLEAR_ACA: | |
5133 | case TMR_CLEAR_TASK_SET: | |
c66ac9db NB |
5134 | tmr->response = TMR_TASK_MGMT_FUNCTION_NOT_SUPPORTED; |
5135 | break; | |
5c6cd613 | 5136 | case TMR_LUN_RESET: |
c66ac9db NB |
5137 | ret = core_tmr_lun_reset(dev, tmr, NULL, NULL); |
5138 | tmr->response = (!ret) ? TMR_FUNCTION_COMPLETE : | |
5139 | TMR_FUNCTION_REJECTED; | |
5140 | break; | |
5c6cd613 | 5141 | case TMR_TARGET_WARM_RESET: |
c66ac9db NB |
5142 | tmr->response = TMR_FUNCTION_REJECTED; |
5143 | break; | |
5c6cd613 | 5144 | case TMR_TARGET_COLD_RESET: |
c66ac9db NB |
5145 | tmr->response = TMR_FUNCTION_REJECTED; |
5146 | break; | |
c66ac9db NB |
5147 | default: |
5148 | printk(KERN_ERR "Uknown TMR function: 0x%02x.\n", | |
5149 | tmr->function); | |
5150 | tmr->response = TMR_FUNCTION_REJECTED; | |
5151 | break; | |
5152 | } | |
5153 | ||
5154 | cmd->t_state = TRANSPORT_ISTATE_PROCESSING; | |
e3d6f909 | 5155 | cmd->se_tfo->queue_tm_rsp(cmd); |
c66ac9db NB |
5156 | |
5157 | transport_cmd_check_stop(cmd, 2, 0); | |
5158 | return 0; | |
5159 | } | |
5160 | ||
5161 | /* | |
5162 | * Called with spin_lock_irq(&dev->execute_task_lock); held | |
5163 | * | |
5164 | */ | |
5165 | static struct se_task * | |
5166 | transport_get_task_from_state_list(struct se_device *dev) | |
5167 | { | |
5168 | struct se_task *task; | |
5169 | ||
5170 | if (list_empty(&dev->state_task_list)) | |
5171 | return NULL; | |
5172 | ||
5173 | list_for_each_entry(task, &dev->state_task_list, t_state_list) | |
5174 | break; | |
5175 | ||
5176 | list_del(&task->t_state_list); | |
5177 | atomic_set(&task->task_state_active, 0); | |
5178 | ||
5179 | return task; | |
5180 | } | |
5181 | ||
5182 | static void transport_processing_shutdown(struct se_device *dev) | |
5183 | { | |
5184 | struct se_cmd *cmd; | |
c66ac9db | 5185 | struct se_task *task; |
c66ac9db NB |
5186 | unsigned long flags; |
5187 | /* | |
5188 | * Empty the struct se_device's struct se_task state list. | |
5189 | */ | |
5190 | spin_lock_irqsave(&dev->execute_task_lock, flags); | |
5191 | while ((task = transport_get_task_from_state_list(dev))) { | |
e3d6f909 AG |
5192 | if (!task->task_se_cmd) { |
5193 | printk(KERN_ERR "task->task_se_cmd is NULL!\n"); | |
c66ac9db NB |
5194 | continue; |
5195 | } | |
e3d6f909 | 5196 | cmd = task->task_se_cmd; |
c66ac9db | 5197 | |
c66ac9db NB |
5198 | spin_unlock_irqrestore(&dev->execute_task_lock, flags); |
5199 | ||
a1d8b49a | 5200 | spin_lock_irqsave(&cmd->t_state_lock, flags); |
c66ac9db NB |
5201 | |
5202 | DEBUG_DO("PT: cmd: %p task: %p ITT/CmdSN: 0x%08x/0x%08x," | |
5203 | " i_state/def_i_state: %d/%d, t_state/def_t_state:" | |
5204 | " %d/%d cdb: 0x%02x\n", cmd, task, | |
e3d6f909 AG |
5205 | cmd->se_tfo->get_task_tag(cmd), cmd->cmd_sn, |
5206 | cmd->se_tfo->get_cmd_state(cmd), cmd->deferred_i_state, | |
c66ac9db | 5207 | cmd->t_state, cmd->deferred_t_state, |
a1d8b49a | 5208 | cmd->t_task_cdb[0]); |
c66ac9db NB |
5209 | DEBUG_DO("PT: ITT[0x%08x] - t_task_cdbs: %d t_task_cdbs_left:" |
5210 | " %d t_task_cdbs_sent: %d -- t_transport_active: %d" | |
5211 | " t_transport_stop: %d t_transport_sent: %d\n", | |
e3d6f909 | 5212 | cmd->se_tfo->get_task_tag(cmd), |
a1d8b49a AG |
5213 | cmd->t_task_cdbs, |
5214 | atomic_read(&cmd->t_task_cdbs_left), | |
5215 | atomic_read(&cmd->t_task_cdbs_sent), | |
5216 | atomic_read(&cmd->t_transport_active), | |
5217 | atomic_read(&cmd->t_transport_stop), | |
5218 | atomic_read(&cmd->t_transport_sent)); | |
c66ac9db NB |
5219 | |
5220 | if (atomic_read(&task->task_active)) { | |
5221 | atomic_set(&task->task_stop, 1); | |
5222 | spin_unlock_irqrestore( | |
a1d8b49a | 5223 | &cmd->t_state_lock, flags); |
c66ac9db NB |
5224 | |
5225 | DEBUG_DO("Waiting for task: %p to shutdown for dev:" | |
5226 | " %p\n", task, dev); | |
5227 | wait_for_completion(&task->task_stop_comp); | |
5228 | DEBUG_DO("Completed task: %p shutdown for dev: %p\n", | |
5229 | task, dev); | |
5230 | ||
a1d8b49a AG |
5231 | spin_lock_irqsave(&cmd->t_state_lock, flags); |
5232 | atomic_dec(&cmd->t_task_cdbs_left); | |
c66ac9db NB |
5233 | |
5234 | atomic_set(&task->task_active, 0); | |
5235 | atomic_set(&task->task_stop, 0); | |
52208ae3 NB |
5236 | } else { |
5237 | if (atomic_read(&task->task_execute_queue) != 0) | |
5238 | transport_remove_task_from_execute_queue(task, dev); | |
c66ac9db NB |
5239 | } |
5240 | __transport_stop_task_timer(task, &flags); | |
5241 | ||
a1d8b49a | 5242 | if (!(atomic_dec_and_test(&cmd->t_task_cdbs_ex_left))) { |
c66ac9db | 5243 | spin_unlock_irqrestore( |
a1d8b49a | 5244 | &cmd->t_state_lock, flags); |
c66ac9db NB |
5245 | |
5246 | DEBUG_DO("Skipping task: %p, dev: %p for" | |
5247 | " t_task_cdbs_ex_left: %d\n", task, dev, | |
a1d8b49a | 5248 | atomic_read(&cmd->t_task_cdbs_ex_left)); |
c66ac9db NB |
5249 | |
5250 | spin_lock_irqsave(&dev->execute_task_lock, flags); | |
5251 | continue; | |
5252 | } | |
5253 | ||
a1d8b49a | 5254 | if (atomic_read(&cmd->t_transport_active)) { |
c66ac9db NB |
5255 | DEBUG_DO("got t_transport_active = 1 for task: %p, dev:" |
5256 | " %p\n", task, dev); | |
5257 | ||
a1d8b49a | 5258 | if (atomic_read(&cmd->t_fe_count)) { |
c66ac9db | 5259 | spin_unlock_irqrestore( |
a1d8b49a | 5260 | &cmd->t_state_lock, flags); |
c66ac9db NB |
5261 | transport_send_check_condition_and_sense( |
5262 | cmd, TCM_LOGICAL_UNIT_COMMUNICATION_FAILURE, | |
5263 | 0); | |
5264 | transport_remove_cmd_from_queue(cmd, | |
5951146d | 5265 | &cmd->se_dev->dev_queue_obj); |
c66ac9db NB |
5266 | |
5267 | transport_lun_remove_cmd(cmd); | |
5268 | transport_cmd_check_stop(cmd, 1, 0); | |
5269 | } else { | |
5270 | spin_unlock_irqrestore( | |
a1d8b49a | 5271 | &cmd->t_state_lock, flags); |
c66ac9db NB |
5272 | |
5273 | transport_remove_cmd_from_queue(cmd, | |
5951146d | 5274 | &cmd->se_dev->dev_queue_obj); |
c66ac9db NB |
5275 | |
5276 | transport_lun_remove_cmd(cmd); | |
5277 | ||
5278 | if (transport_cmd_check_stop(cmd, 1, 0)) | |
35462975 | 5279 | transport_generic_remove(cmd, 0); |
c66ac9db NB |
5280 | } |
5281 | ||
5282 | spin_lock_irqsave(&dev->execute_task_lock, flags); | |
5283 | continue; | |
5284 | } | |
5285 | DEBUG_DO("Got t_transport_active = 0 for task: %p, dev: %p\n", | |
5286 | task, dev); | |
5287 | ||
a1d8b49a | 5288 | if (atomic_read(&cmd->t_fe_count)) { |
c66ac9db | 5289 | spin_unlock_irqrestore( |
a1d8b49a | 5290 | &cmd->t_state_lock, flags); |
c66ac9db NB |
5291 | transport_send_check_condition_and_sense(cmd, |
5292 | TCM_LOGICAL_UNIT_COMMUNICATION_FAILURE, 0); | |
5293 | transport_remove_cmd_from_queue(cmd, | |
5951146d | 5294 | &cmd->se_dev->dev_queue_obj); |
c66ac9db NB |
5295 | |
5296 | transport_lun_remove_cmd(cmd); | |
5297 | transport_cmd_check_stop(cmd, 1, 0); | |
5298 | } else { | |
5299 | spin_unlock_irqrestore( | |
a1d8b49a | 5300 | &cmd->t_state_lock, flags); |
c66ac9db NB |
5301 | |
5302 | transport_remove_cmd_from_queue(cmd, | |
5951146d | 5303 | &cmd->se_dev->dev_queue_obj); |
c66ac9db NB |
5304 | transport_lun_remove_cmd(cmd); |
5305 | ||
5306 | if (transport_cmd_check_stop(cmd, 1, 0)) | |
35462975 | 5307 | transport_generic_remove(cmd, 0); |
c66ac9db NB |
5308 | } |
5309 | ||
5310 | spin_lock_irqsave(&dev->execute_task_lock, flags); | |
5311 | } | |
5312 | spin_unlock_irqrestore(&dev->execute_task_lock, flags); | |
5313 | /* | |
5314 | * Empty the struct se_device's struct se_cmd list. | |
5315 | */ | |
5951146d | 5316 | while ((cmd = transport_get_cmd_from_queue(&dev->dev_queue_obj))) { |
c66ac9db NB |
5317 | |
5318 | DEBUG_DO("From Device Queue: cmd: %p t_state: %d\n", | |
5951146d | 5319 | cmd, cmd->t_state); |
c66ac9db | 5320 | |
a1d8b49a | 5321 | if (atomic_read(&cmd->t_fe_count)) { |
c66ac9db NB |
5322 | transport_send_check_condition_and_sense(cmd, |
5323 | TCM_LOGICAL_UNIT_COMMUNICATION_FAILURE, 0); | |
5324 | ||
5325 | transport_lun_remove_cmd(cmd); | |
5326 | transport_cmd_check_stop(cmd, 1, 0); | |
5327 | } else { | |
5328 | transport_lun_remove_cmd(cmd); | |
5329 | if (transport_cmd_check_stop(cmd, 1, 0)) | |
35462975 | 5330 | transport_generic_remove(cmd, 0); |
c66ac9db | 5331 | } |
c66ac9db | 5332 | } |
c66ac9db NB |
5333 | } |
5334 | ||
5335 | /* transport_processing_thread(): | |
5336 | * | |
5337 | * | |
5338 | */ | |
5339 | static int transport_processing_thread(void *param) | |
5340 | { | |
5951146d | 5341 | int ret; |
c66ac9db NB |
5342 | struct se_cmd *cmd; |
5343 | struct se_device *dev = (struct se_device *) param; | |
c66ac9db NB |
5344 | |
5345 | set_user_nice(current, -20); | |
5346 | ||
5347 | while (!kthread_should_stop()) { | |
e3d6f909 AG |
5348 | ret = wait_event_interruptible(dev->dev_queue_obj.thread_wq, |
5349 | atomic_read(&dev->dev_queue_obj.queue_cnt) || | |
c66ac9db NB |
5350 | kthread_should_stop()); |
5351 | if (ret < 0) | |
5352 | goto out; | |
5353 | ||
5354 | spin_lock_irq(&dev->dev_status_lock); | |
5355 | if (dev->dev_status & TRANSPORT_DEVICE_SHUTDOWN) { | |
5356 | spin_unlock_irq(&dev->dev_status_lock); | |
5357 | transport_processing_shutdown(dev); | |
5358 | continue; | |
5359 | } | |
5360 | spin_unlock_irq(&dev->dev_status_lock); | |
5361 | ||
5362 | get_cmd: | |
5363 | __transport_execute_tasks(dev); | |
5364 | ||
5951146d AG |
5365 | cmd = transport_get_cmd_from_queue(&dev->dev_queue_obj); |
5366 | if (!cmd) | |
c66ac9db NB |
5367 | continue; |
5368 | ||
5951146d | 5369 | switch (cmd->t_state) { |
c66ac9db | 5370 | case TRANSPORT_NEW_CMD_MAP: |
e3d6f909 AG |
5371 | if (!(cmd->se_tfo->new_cmd_map)) { |
5372 | printk(KERN_ERR "cmd->se_tfo->new_cmd_map is" | |
c66ac9db NB |
5373 | " NULL for TRANSPORT_NEW_CMD_MAP\n"); |
5374 | BUG(); | |
5375 | } | |
e3d6f909 | 5376 | ret = cmd->se_tfo->new_cmd_map(cmd); |
c66ac9db NB |
5377 | if (ret < 0) { |
5378 | cmd->transport_error_status = ret; | |
5379 | transport_generic_request_failure(cmd, NULL, | |
5380 | 0, (cmd->data_direction != | |
5381 | DMA_TO_DEVICE)); | |
5382 | break; | |
5383 | } | |
5384 | /* Fall through */ | |
5385 | case TRANSPORT_NEW_CMD: | |
5386 | ret = transport_generic_new_cmd(cmd); | |
07bde79a NB |
5387 | if (ret == -EAGAIN) |
5388 | break; | |
5389 | else if (ret < 0) { | |
c66ac9db NB |
5390 | cmd->transport_error_status = ret; |
5391 | transport_generic_request_failure(cmd, NULL, | |
5392 | 0, (cmd->data_direction != | |
5393 | DMA_TO_DEVICE)); | |
5394 | } | |
5395 | break; | |
5396 | case TRANSPORT_PROCESS_WRITE: | |
5397 | transport_generic_process_write(cmd); | |
5398 | break; | |
5399 | case TRANSPORT_COMPLETE_OK: | |
5400 | transport_stop_all_task_timers(cmd); | |
5401 | transport_generic_complete_ok(cmd); | |
5402 | break; | |
5403 | case TRANSPORT_REMOVE: | |
35462975 | 5404 | transport_generic_remove(cmd, 0); |
c66ac9db | 5405 | break; |
f4366772 | 5406 | case TRANSPORT_FREE_CMD_INTR: |
35462975 | 5407 | transport_generic_free_cmd(cmd, 0, 0); |
f4366772 | 5408 | break; |
c66ac9db NB |
5409 | case TRANSPORT_PROCESS_TMR: |
5410 | transport_generic_do_tmr(cmd); | |
5411 | break; | |
5412 | case TRANSPORT_COMPLETE_FAILURE: | |
5413 | transport_generic_request_failure(cmd, NULL, 1, 1); | |
5414 | break; | |
5415 | case TRANSPORT_COMPLETE_TIMEOUT: | |
5416 | transport_stop_all_task_timers(cmd); | |
5417 | transport_generic_request_timeout(cmd); | |
5418 | break; | |
07bde79a NB |
5419 | case TRANSPORT_COMPLETE_QF_WP: |
5420 | transport_generic_write_pending(cmd); | |
5421 | break; | |
c66ac9db NB |
5422 | default: |
5423 | printk(KERN_ERR "Unknown t_state: %d deferred_t_state:" | |
5424 | " %d for ITT: 0x%08x i_state: %d on SE LUN:" | |
5951146d | 5425 | " %u\n", cmd->t_state, cmd->deferred_t_state, |
e3d6f909 AG |
5426 | cmd->se_tfo->get_task_tag(cmd), |
5427 | cmd->se_tfo->get_cmd_state(cmd), | |
5428 | cmd->se_lun->unpacked_lun); | |
c66ac9db NB |
5429 | BUG(); |
5430 | } | |
5431 | ||
5432 | goto get_cmd; | |
5433 | } | |
5434 | ||
5435 | out: | |
5436 | transport_release_all_cmds(dev); | |
5437 | dev->process_thread = NULL; | |
5438 | return 0; | |
5439 | } |