1 /*******************************************************************************
2 * This file contains main functions related to the iSCSI Target Core Driver.
4 * \u00a9 Copyright 2007-2011 RisingTide Systems LLC.
6 * Licensed to the Linux Foundation under the General Public License (GPL) version 2.
8 * Author: Nicholas A. Bellinger <nab@linux-iscsi.org>
10 * This program is free software; you can redistribute it and/or modify
11 * it under the terms of the GNU General Public License as published by
12 * the Free Software Foundation; either version 2 of the License, or
13 * (at your option) any later version.
15 * This program is distributed in the hope that it will be useful,
16 * but WITHOUT ANY WARRANTY; without even the implied warranty of
17 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
18 * GNU General Public License for more details.
19 ******************************************************************************/
21 #include <linux/string.h>
22 #include <linux/kthread.h>
23 #include <linux/crypto.h>
24 #include <linux/completion.h>
25 #include <linux/module.h>
26 #include <asm/unaligned.h>
27 #include <scsi/scsi_device.h>
28 #include <scsi/iscsi_proto.h>
29 #include <target/target_core_base.h>
30 #include <target/target_core_tmr.h>
31 #include <target/target_core_transport.h>
33 #include "iscsi_target_core.h"
34 #include "iscsi_target_parameters.h"
35 #include "iscsi_target_seq_pdu_list.h"
36 #include "iscsi_target_tq.h"
37 #include "iscsi_target_configfs.h"
38 #include "iscsi_target_datain_values.h"
39 #include "iscsi_target_erl0.h"
40 #include "iscsi_target_erl1.h"
41 #include "iscsi_target_erl2.h"
42 #include "iscsi_target_login.h"
43 #include "iscsi_target_tmr.h"
44 #include "iscsi_target_tpg.h"
45 #include "iscsi_target_util.h"
46 #include "iscsi_target.h"
47 #include "iscsi_target_device.h"
48 #include "iscsi_target_stat.h"
50 static LIST_HEAD(g_tiqn_list
);
51 static LIST_HEAD(g_np_list
);
52 static DEFINE_SPINLOCK(tiqn_lock
);
53 static DEFINE_SPINLOCK(np_lock
);
55 static struct idr tiqn_idr
;
57 struct mutex auth_id_lock
;
58 spinlock_t sess_idr_lock
;
60 struct iscsit_global
*iscsit_global
;
62 struct kmem_cache
*lio_cmd_cache
;
63 struct kmem_cache
*lio_qr_cache
;
64 struct kmem_cache
*lio_dr_cache
;
65 struct kmem_cache
*lio_ooo_cache
;
66 struct kmem_cache
*lio_r2t_cache
;
68 static int iscsit_handle_immediate_data(struct iscsi_cmd
*,
69 unsigned char *buf
, u32
);
70 static int iscsit_logout_post_handler(struct iscsi_cmd
*, struct iscsi_conn
*);
72 struct iscsi_tiqn
*iscsit_get_tiqn_for_login(unsigned char *buf
)
74 struct iscsi_tiqn
*tiqn
= NULL
;
76 spin_lock(&tiqn_lock
);
77 list_for_each_entry(tiqn
, &g_tiqn_list
, tiqn_list
) {
78 if (!strcmp(tiqn
->tiqn
, buf
)) {
80 spin_lock(&tiqn
->tiqn_state_lock
);
81 if (tiqn
->tiqn_state
== TIQN_STATE_ACTIVE
) {
82 tiqn
->tiqn_access_count
++;
83 spin_unlock(&tiqn
->tiqn_state_lock
);
84 spin_unlock(&tiqn_lock
);
87 spin_unlock(&tiqn
->tiqn_state_lock
);
90 spin_unlock(&tiqn_lock
);
95 static int iscsit_set_tiqn_shutdown(struct iscsi_tiqn
*tiqn
)
97 spin_lock(&tiqn
->tiqn_state_lock
);
98 if (tiqn
->tiqn_state
== TIQN_STATE_ACTIVE
) {
99 tiqn
->tiqn_state
= TIQN_STATE_SHUTDOWN
;
100 spin_unlock(&tiqn
->tiqn_state_lock
);
103 spin_unlock(&tiqn
->tiqn_state_lock
);
108 void iscsit_put_tiqn_for_login(struct iscsi_tiqn
*tiqn
)
110 spin_lock(&tiqn
->tiqn_state_lock
);
111 tiqn
->tiqn_access_count
--;
112 spin_unlock(&tiqn
->tiqn_state_lock
);
116 * Note that IQN formatting is expected to be done in userspace, and
117 * no explict IQN format checks are done here.
119 struct iscsi_tiqn
*iscsit_add_tiqn(unsigned char *buf
)
121 struct iscsi_tiqn
*tiqn
= NULL
;
124 if (strlen(buf
) >= ISCSI_IQN_LEN
) {
125 pr_err("Target IQN exceeds %d bytes\n",
127 return ERR_PTR(-EINVAL
);
130 tiqn
= kzalloc(sizeof(struct iscsi_tiqn
), GFP_KERNEL
);
132 pr_err("Unable to allocate struct iscsi_tiqn\n");
133 return ERR_PTR(-ENOMEM
);
136 sprintf(tiqn
->tiqn
, "%s", buf
);
137 INIT_LIST_HEAD(&tiqn
->tiqn_list
);
138 INIT_LIST_HEAD(&tiqn
->tiqn_tpg_list
);
139 spin_lock_init(&tiqn
->tiqn_state_lock
);
140 spin_lock_init(&tiqn
->tiqn_tpg_lock
);
141 spin_lock_init(&tiqn
->sess_err_stats
.lock
);
142 spin_lock_init(&tiqn
->login_stats
.lock
);
143 spin_lock_init(&tiqn
->logout_stats
.lock
);
145 if (!idr_pre_get(&tiqn_idr
, GFP_KERNEL
)) {
146 pr_err("idr_pre_get() for tiqn_idr failed\n");
148 return ERR_PTR(-ENOMEM
);
150 tiqn
->tiqn_state
= TIQN_STATE_ACTIVE
;
152 spin_lock(&tiqn_lock
);
153 ret
= idr_get_new(&tiqn_idr
, NULL
, &tiqn
->tiqn_index
);
155 pr_err("idr_get_new() failed for tiqn->tiqn_index\n");
156 spin_unlock(&tiqn_lock
);
160 list_add_tail(&tiqn
->tiqn_list
, &g_tiqn_list
);
161 spin_unlock(&tiqn_lock
);
163 pr_debug("CORE[0] - Added iSCSI Target IQN: %s\n", tiqn
->tiqn
);
169 static void iscsit_wait_for_tiqn(struct iscsi_tiqn
*tiqn
)
172 * Wait for accesses to said struct iscsi_tiqn to end.
174 spin_lock(&tiqn
->tiqn_state_lock
);
175 while (tiqn
->tiqn_access_count
!= 0) {
176 spin_unlock(&tiqn
->tiqn_state_lock
);
178 spin_lock(&tiqn
->tiqn_state_lock
);
180 spin_unlock(&tiqn
->tiqn_state_lock
);
183 void iscsit_del_tiqn(struct iscsi_tiqn
*tiqn
)
186 * iscsit_set_tiqn_shutdown sets tiqn->tiqn_state = TIQN_STATE_SHUTDOWN
187 * while holding tiqn->tiqn_state_lock. This means that all subsequent
188 * attempts to access this struct iscsi_tiqn will fail from both transport
189 * fabric and control code paths.
191 if (iscsit_set_tiqn_shutdown(tiqn
) < 0) {
192 pr_err("iscsit_set_tiqn_shutdown() failed\n");
196 iscsit_wait_for_tiqn(tiqn
);
198 spin_lock(&tiqn_lock
);
199 list_del(&tiqn
->tiqn_list
);
200 idr_remove(&tiqn_idr
, tiqn
->tiqn_index
);
201 spin_unlock(&tiqn_lock
);
203 pr_debug("CORE[0] - Deleted iSCSI Target IQN: %s\n",
208 int iscsit_access_np(struct iscsi_np
*np
, struct iscsi_portal_group
*tpg
)
212 * Determine if the network portal is accepting storage traffic.
214 spin_lock_bh(&np
->np_thread_lock
);
215 if (np
->np_thread_state
!= ISCSI_NP_THREAD_ACTIVE
) {
216 spin_unlock_bh(&np
->np_thread_lock
);
219 if (np
->np_login_tpg
) {
220 pr_err("np->np_login_tpg() is not NULL!\n");
221 spin_unlock_bh(&np
->np_thread_lock
);
224 spin_unlock_bh(&np
->np_thread_lock
);
226 * Determine if the portal group is accepting storage traffic.
228 spin_lock_bh(&tpg
->tpg_state_lock
);
229 if (tpg
->tpg_state
!= TPG_STATE_ACTIVE
) {
230 spin_unlock_bh(&tpg
->tpg_state_lock
);
233 spin_unlock_bh(&tpg
->tpg_state_lock
);
236 * Here we serialize access across the TIQN+TPG Tuple.
238 ret
= mutex_lock_interruptible(&tpg
->np_login_lock
);
239 if ((ret
!= 0) || signal_pending(current
))
242 spin_lock_bh(&np
->np_thread_lock
);
243 np
->np_login_tpg
= tpg
;
244 spin_unlock_bh(&np
->np_thread_lock
);
249 int iscsit_deaccess_np(struct iscsi_np
*np
, struct iscsi_portal_group
*tpg
)
251 struct iscsi_tiqn
*tiqn
= tpg
->tpg_tiqn
;
253 spin_lock_bh(&np
->np_thread_lock
);
254 np
->np_login_tpg
= NULL
;
255 spin_unlock_bh(&np
->np_thread_lock
);
257 mutex_unlock(&tpg
->np_login_lock
);
260 iscsit_put_tiqn_for_login(tiqn
);
265 static struct iscsi_np
*iscsit_get_np(
266 struct __kernel_sockaddr_storage
*sockaddr
,
267 int network_transport
)
269 struct sockaddr_in
*sock_in
, *sock_in_e
;
270 struct sockaddr_in6
*sock_in6
, *sock_in6_e
;
275 spin_lock_bh(&np_lock
);
276 list_for_each_entry(np
, &g_np_list
, np_list
) {
277 spin_lock(&np
->np_thread_lock
);
278 if (np
->np_thread_state
!= ISCSI_NP_THREAD_ACTIVE
) {
279 spin_unlock(&np
->np_thread_lock
);
283 if (sockaddr
->ss_family
== AF_INET6
) {
284 sock_in6
= (struct sockaddr_in6
*)sockaddr
;
285 sock_in6_e
= (struct sockaddr_in6
*)&np
->np_sockaddr
;
287 if (!memcmp((void *)&sock_in6
->sin6_addr
.in6_u
,
288 (void *)&sock_in6_e
->sin6_addr
.in6_u
,
289 sizeof(struct in6_addr
)))
292 port
= ntohs(sock_in6
->sin6_port
);
294 sock_in
= (struct sockaddr_in
*)sockaddr
;
295 sock_in_e
= (struct sockaddr_in
*)&np
->np_sockaddr
;
297 if (sock_in
->sin_addr
.s_addr
==
298 sock_in_e
->sin_addr
.s_addr
)
301 port
= ntohs(sock_in
->sin_port
);
304 if ((ip_match
== 1) && (np
->np_port
== port
) &&
305 (np
->np_network_transport
== network_transport
)) {
307 * Increment the np_exports reference count now to
308 * prevent iscsit_del_np() below from being called
309 * while iscsi_tpg_add_network_portal() is called.
312 spin_unlock(&np
->np_thread_lock
);
313 spin_unlock_bh(&np_lock
);
316 spin_unlock(&np
->np_thread_lock
);
318 spin_unlock_bh(&np_lock
);
323 struct iscsi_np
*iscsit_add_np(
324 struct __kernel_sockaddr_storage
*sockaddr
,
326 int network_transport
)
328 struct sockaddr_in
*sock_in
;
329 struct sockaddr_in6
*sock_in6
;
333 * Locate the existing struct iscsi_np if already active..
335 np
= iscsit_get_np(sockaddr
, network_transport
);
339 np
= kzalloc(sizeof(struct iscsi_np
), GFP_KERNEL
);
341 pr_err("Unable to allocate memory for struct iscsi_np\n");
342 return ERR_PTR(-ENOMEM
);
345 np
->np_flags
|= NPF_IP_NETWORK
;
346 if (sockaddr
->ss_family
== AF_INET6
) {
347 sock_in6
= (struct sockaddr_in6
*)sockaddr
;
348 snprintf(np
->np_ip
, IPV6_ADDRESS_SPACE
, "%s", ip_str
);
349 np
->np_port
= ntohs(sock_in6
->sin6_port
);
351 sock_in
= (struct sockaddr_in
*)sockaddr
;
352 sprintf(np
->np_ip
, "%s", ip_str
);
353 np
->np_port
= ntohs(sock_in
->sin_port
);
356 np
->np_network_transport
= network_transport
;
357 spin_lock_init(&np
->np_thread_lock
);
358 init_completion(&np
->np_restart_comp
);
359 INIT_LIST_HEAD(&np
->np_list
);
361 ret
= iscsi_target_setup_login_socket(np
, sockaddr
);
367 np
->np_thread
= kthread_run(iscsi_target_login_thread
, np
, "iscsi_np");
368 if (IS_ERR(np
->np_thread
)) {
369 pr_err("Unable to create kthread: iscsi_np\n");
370 ret
= PTR_ERR(np
->np_thread
);
375 * Increment the np_exports reference count now to prevent
376 * iscsit_del_np() below from being run while a new call to
377 * iscsi_tpg_add_network_portal() for a matching iscsi_np is
378 * active. We don't need to hold np->np_thread_lock at this
379 * point because iscsi_np has not been added to g_np_list yet.
383 spin_lock_bh(&np_lock
);
384 list_add_tail(&np
->np_list
, &g_np_list
);
385 spin_unlock_bh(&np_lock
);
387 pr_debug("CORE[0] - Added Network Portal: %s:%hu on %s\n",
388 np
->np_ip
, np
->np_port
, (np
->np_network_transport
== ISCSI_TCP
) ?
394 int iscsit_reset_np_thread(
396 struct iscsi_tpg_np
*tpg_np
,
397 struct iscsi_portal_group
*tpg
)
399 spin_lock_bh(&np
->np_thread_lock
);
402 * The reset operation need only be performed when the
403 * passed struct iscsi_portal_group has a login in progress
404 * to one of the network portals.
406 if (tpg_np
->tpg_np
->np_login_tpg
!= tpg
) {
407 spin_unlock_bh(&np
->np_thread_lock
);
411 if (np
->np_thread_state
== ISCSI_NP_THREAD_INACTIVE
) {
412 spin_unlock_bh(&np
->np_thread_lock
);
415 np
->np_thread_state
= ISCSI_NP_THREAD_RESET
;
418 spin_unlock_bh(&np
->np_thread_lock
);
419 send_sig(SIGINT
, np
->np_thread
, 1);
420 wait_for_completion(&np
->np_restart_comp
);
421 spin_lock_bh(&np
->np_thread_lock
);
423 spin_unlock_bh(&np
->np_thread_lock
);
428 int iscsit_del_np_comm(struct iscsi_np
*np
)
434 * Some network transports allocate their own struct sock->file,
435 * see if we need to free any additional allocated resources.
437 if (np
->np_flags
& NPF_SCTP_STRUCT_FILE
) {
438 kfree(np
->np_socket
->file
);
439 np
->np_socket
->file
= NULL
;
442 sock_release(np
->np_socket
);
446 int iscsit_del_np(struct iscsi_np
*np
)
448 spin_lock_bh(&np
->np_thread_lock
);
450 if (np
->np_exports
) {
451 spin_unlock_bh(&np
->np_thread_lock
);
454 np
->np_thread_state
= ISCSI_NP_THREAD_SHUTDOWN
;
455 spin_unlock_bh(&np
->np_thread_lock
);
459 * We need to send the signal to wakeup Linux/Net
460 * which may be sleeping in sock_accept()..
462 send_sig(SIGINT
, np
->np_thread
, 1);
463 kthread_stop(np
->np_thread
);
465 iscsit_del_np_comm(np
);
467 spin_lock_bh(&np_lock
);
468 list_del(&np
->np_list
);
469 spin_unlock_bh(&np_lock
);
471 pr_debug("CORE[0] - Removed Network Portal: %s:%hu on %s\n",
472 np
->np_ip
, np
->np_port
, (np
->np_network_transport
== ISCSI_TCP
) ?
479 static int __init
iscsi_target_init_module(void)
483 pr_debug("iSCSI-Target "ISCSIT_VERSION
"\n");
485 iscsit_global
= kzalloc(sizeof(struct iscsit_global
), GFP_KERNEL
);
486 if (!iscsit_global
) {
487 pr_err("Unable to allocate memory for iscsit_global\n");
490 mutex_init(&auth_id_lock
);
491 spin_lock_init(&sess_idr_lock
);
495 ret
= iscsi_target_register_configfs();
499 ret
= iscsi_thread_set_init();
503 if (iscsi_allocate_thread_sets(TARGET_THREAD_SET_COUNT
) !=
504 TARGET_THREAD_SET_COUNT
) {
505 pr_err("iscsi_allocate_thread_sets() returned"
506 " unexpected value!\n");
510 lio_cmd_cache
= kmem_cache_create("lio_cmd_cache",
511 sizeof(struct iscsi_cmd
), __alignof__(struct iscsi_cmd
),
513 if (!lio_cmd_cache
) {
514 pr_err("Unable to kmem_cache_create() for"
519 lio_qr_cache
= kmem_cache_create("lio_qr_cache",
520 sizeof(struct iscsi_queue_req
),
521 __alignof__(struct iscsi_queue_req
), 0, NULL
);
523 pr_err("nable to kmem_cache_create() for"
528 lio_dr_cache
= kmem_cache_create("lio_dr_cache",
529 sizeof(struct iscsi_datain_req
),
530 __alignof__(struct iscsi_datain_req
), 0, NULL
);
532 pr_err("Unable to kmem_cache_create() for"
537 lio_ooo_cache
= kmem_cache_create("lio_ooo_cache",
538 sizeof(struct iscsi_ooo_cmdsn
),
539 __alignof__(struct iscsi_ooo_cmdsn
), 0, NULL
);
540 if (!lio_ooo_cache
) {
541 pr_err("Unable to kmem_cache_create() for"
546 lio_r2t_cache
= kmem_cache_create("lio_r2t_cache",
547 sizeof(struct iscsi_r2t
), __alignof__(struct iscsi_r2t
),
549 if (!lio_r2t_cache
) {
550 pr_err("Unable to kmem_cache_create() for"
555 if (iscsit_load_discovery_tpg() < 0)
560 kmem_cache_destroy(lio_r2t_cache
);
562 kmem_cache_destroy(lio_ooo_cache
);
564 kmem_cache_destroy(lio_dr_cache
);
566 kmem_cache_destroy(lio_qr_cache
);
568 kmem_cache_destroy(lio_cmd_cache
);
570 iscsi_deallocate_thread_sets();
572 iscsi_thread_set_free();
574 iscsi_target_deregister_configfs();
576 kfree(iscsit_global
);
580 static void __exit
iscsi_target_cleanup_module(void)
582 iscsi_deallocate_thread_sets();
583 iscsi_thread_set_free();
584 iscsit_release_discovery_tpg();
585 kmem_cache_destroy(lio_cmd_cache
);
586 kmem_cache_destroy(lio_qr_cache
);
587 kmem_cache_destroy(lio_dr_cache
);
588 kmem_cache_destroy(lio_ooo_cache
);
589 kmem_cache_destroy(lio_r2t_cache
);
591 iscsi_target_deregister_configfs();
593 kfree(iscsit_global
);
596 int iscsit_add_reject(
600 struct iscsi_conn
*conn
)
602 struct iscsi_cmd
*cmd
;
603 struct iscsi_reject
*hdr
;
606 cmd
= iscsit_allocate_cmd(conn
, GFP_KERNEL
);
610 cmd
->iscsi_opcode
= ISCSI_OP_REJECT
;
612 cmd
->cmd_flags
|= ICF_REJECT_FAIL_CONN
;
614 hdr
= (struct iscsi_reject
*) cmd
->pdu
;
615 hdr
->reason
= reason
;
617 cmd
->buf_ptr
= kzalloc(ISCSI_HDR_LEN
, GFP_KERNEL
);
619 pr_err("Unable to allocate memory for cmd->buf_ptr\n");
620 iscsit_release_cmd(cmd
);
623 memcpy(cmd
->buf_ptr
, buf
, ISCSI_HDR_LEN
);
625 spin_lock_bh(&conn
->cmd_lock
);
626 list_add_tail(&cmd
->i_list
, &conn
->conn_cmd_list
);
627 spin_unlock_bh(&conn
->cmd_lock
);
629 cmd
->i_state
= ISTATE_SEND_REJECT
;
630 iscsit_add_cmd_to_response_queue(cmd
, conn
, cmd
->i_state
);
632 ret
= wait_for_completion_interruptible(&cmd
->reject_comp
);
636 return (!fail_conn
) ? 0 : -1;
639 int iscsit_add_reject_from_cmd(
644 struct iscsi_cmd
*cmd
)
646 struct iscsi_conn
*conn
;
647 struct iscsi_reject
*hdr
;
651 pr_err("cmd->conn is NULL for ITT: 0x%08x\n",
657 cmd
->iscsi_opcode
= ISCSI_OP_REJECT
;
659 cmd
->cmd_flags
|= ICF_REJECT_FAIL_CONN
;
661 hdr
= (struct iscsi_reject
*) cmd
->pdu
;
662 hdr
->reason
= reason
;
664 cmd
->buf_ptr
= kzalloc(ISCSI_HDR_LEN
, GFP_KERNEL
);
666 pr_err("Unable to allocate memory for cmd->buf_ptr\n");
667 iscsit_release_cmd(cmd
);
670 memcpy(cmd
->buf_ptr
, buf
, ISCSI_HDR_LEN
);
673 spin_lock_bh(&conn
->cmd_lock
);
674 list_add_tail(&cmd
->i_list
, &conn
->conn_cmd_list
);
675 spin_unlock_bh(&conn
->cmd_lock
);
678 cmd
->i_state
= ISTATE_SEND_REJECT
;
679 iscsit_add_cmd_to_response_queue(cmd
, conn
, cmd
->i_state
);
681 ret
= wait_for_completion_interruptible(&cmd
->reject_comp
);
685 return (!fail_conn
) ? 0 : -1;
689 * Map some portion of the allocated scatterlist to an iovec, suitable for
690 * kernel sockets to copy data in/out. This handles both pages and slab-allocated
691 * buffers, since we have been tricky and mapped t_mem_sg to the buffer in
692 * either case (see iscsit_alloc_buffs)
694 static int iscsit_map_iovec(
695 struct iscsi_cmd
*cmd
,
701 struct scatterlist
*sg
;
702 unsigned int page_off
;
705 * We have a private mapping of the allocated pages in t_mem_sg.
706 * At this point, we also know each contains a page.
708 sg
= &cmd
->t_mem_sg
[data_offset
/ PAGE_SIZE
];
709 page_off
= (data_offset
% PAGE_SIZE
);
711 cmd
->first_data_sg
= sg
;
712 cmd
->first_data_sg_off
= page_off
;
714 while (data_length
) {
715 u32 cur_len
= min_t(u32
, data_length
, sg
->length
- page_off
);
717 iov
[i
].iov_base
= kmap(sg_page(sg
)) + sg
->offset
+ page_off
;
718 iov
[i
].iov_len
= cur_len
;
720 data_length
-= cur_len
;
726 cmd
->kmapped_nents
= i
;
731 static void iscsit_unmap_iovec(struct iscsi_cmd
*cmd
)
734 struct scatterlist
*sg
;
736 sg
= cmd
->first_data_sg
;
738 for (i
= 0; i
< cmd
->kmapped_nents
; i
++)
739 kunmap(sg_page(&sg
[i
]));
742 static void iscsit_ack_from_expstatsn(struct iscsi_conn
*conn
, u32 exp_statsn
)
744 struct iscsi_cmd
*cmd
;
746 conn
->exp_statsn
= exp_statsn
;
748 spin_lock_bh(&conn
->cmd_lock
);
749 list_for_each_entry(cmd
, &conn
->conn_cmd_list
, i_list
) {
750 spin_lock(&cmd
->istate_lock
);
751 if ((cmd
->i_state
== ISTATE_SENT_STATUS
) &&
752 (cmd
->stat_sn
< exp_statsn
)) {
753 cmd
->i_state
= ISTATE_REMOVE
;
754 spin_unlock(&cmd
->istate_lock
);
755 iscsit_add_cmd_to_immediate_queue(cmd
, conn
,
759 spin_unlock(&cmd
->istate_lock
);
761 spin_unlock_bh(&conn
->cmd_lock
);
764 static int iscsit_allocate_iovecs(struct iscsi_cmd
*cmd
)
766 u32 iov_count
= (cmd
->se_cmd
.t_data_nents
== 0) ? 1 :
767 cmd
->se_cmd
.t_data_nents
;
769 iov_count
+= ISCSI_IOV_DATA_BUFFER
;
771 cmd
->iov_data
= kzalloc(iov_count
* sizeof(struct kvec
), GFP_KERNEL
);
772 if (!cmd
->iov_data
) {
773 pr_err("Unable to allocate cmd->iov_data\n");
777 cmd
->orig_iov_data_count
= iov_count
;
781 static int iscsit_alloc_buffs(struct iscsi_cmd
*cmd
)
783 struct scatterlist
*sgl
;
784 u32 length
= cmd
->se_cmd
.data_length
;
785 int nents
= DIV_ROUND_UP(length
, PAGE_SIZE
);
788 * If no SCSI payload is present, allocate the default iovecs used for
792 return iscsit_allocate_iovecs(cmd
);
794 sgl
= kzalloc(sizeof(*sgl
) * nents
, GFP_KERNEL
);
798 sg_init_table(sgl
, nents
);
801 int buf_size
= min_t(int, length
, PAGE_SIZE
);
804 page
= alloc_page(GFP_KERNEL
| __GFP_ZERO
);
806 goto page_alloc_failed
;
808 sg_set_page(&sgl
[i
], page
, buf_size
, 0);
815 cmd
->t_mem_sg_nents
= nents
;
817 /* BIDI ops not supported */
819 /* Tell the core about our preallocated memory */
820 transport_generic_map_mem_to_cmd(&cmd
->se_cmd
, sgl
, nents
, NULL
, 0);
822 * Allocate iovecs for SCSI payload after transport_generic_map_mem_to_cmd
823 * so that cmd->se_cmd.t_tasks_se_num has been set.
825 ret
= iscsit_allocate_iovecs(cmd
);
827 goto page_alloc_failed
;
833 __free_page(sg_page(&sgl
[i
]));
836 kfree(cmd
->t_mem_sg
);
837 cmd
->t_mem_sg
= NULL
;
841 static int iscsit_handle_scsi_cmd(
842 struct iscsi_conn
*conn
,
845 int data_direction
, cmdsn_ret
= 0, immed_ret
, ret
, transport_ret
;
846 int dump_immediate_data
= 0, send_check_condition
= 0, payload_length
;
847 struct iscsi_cmd
*cmd
= NULL
;
848 struct iscsi_scsi_req
*hdr
;
850 spin_lock_bh(&conn
->sess
->session_stats_lock
);
851 conn
->sess
->cmd_pdus
++;
852 if (conn
->sess
->se_sess
->se_node_acl
) {
853 spin_lock(&conn
->sess
->se_sess
->se_node_acl
->stats_lock
);
854 conn
->sess
->se_sess
->se_node_acl
->num_cmds
++;
855 spin_unlock(&conn
->sess
->se_sess
->se_node_acl
->stats_lock
);
857 spin_unlock_bh(&conn
->sess
->session_stats_lock
);
859 hdr
= (struct iscsi_scsi_req
*) buf
;
860 payload_length
= ntoh24(hdr
->dlength
);
861 hdr
->itt
= be32_to_cpu(hdr
->itt
);
862 hdr
->data_length
= be32_to_cpu(hdr
->data_length
);
863 hdr
->cmdsn
= be32_to_cpu(hdr
->cmdsn
);
864 hdr
->exp_statsn
= be32_to_cpu(hdr
->exp_statsn
);
866 /* FIXME; Add checks for AdditionalHeaderSegment */
868 if (!(hdr
->flags
& ISCSI_FLAG_CMD_WRITE
) &&
869 !(hdr
->flags
& ISCSI_FLAG_CMD_FINAL
)) {
870 pr_err("ISCSI_FLAG_CMD_WRITE & ISCSI_FLAG_CMD_FINAL"
871 " not set. Bad iSCSI Initiator.\n");
872 return iscsit_add_reject(ISCSI_REASON_BOOKMARK_INVALID
, 1,
876 if (((hdr
->flags
& ISCSI_FLAG_CMD_READ
) ||
877 (hdr
->flags
& ISCSI_FLAG_CMD_WRITE
)) && !hdr
->data_length
) {
879 * Vmware ESX v3.0 uses a modified Cisco Initiator (v3.4.2)
880 * that adds support for RESERVE/RELEASE. There is a bug
881 * add with this new functionality that sets R/W bits when
882 * neither CDB carries any READ or WRITE datapayloads.
884 if ((hdr
->cdb
[0] == 0x16) || (hdr
->cdb
[0] == 0x17)) {
885 hdr
->flags
&= ~ISCSI_FLAG_CMD_READ
;
886 hdr
->flags
&= ~ISCSI_FLAG_CMD_WRITE
;
890 pr_err("ISCSI_FLAG_CMD_READ or ISCSI_FLAG_CMD_WRITE"
891 " set when Expected Data Transfer Length is 0 for"
892 " CDB: 0x%02x. Bad iSCSI Initiator.\n", hdr
->cdb
[0]);
893 return iscsit_add_reject(ISCSI_REASON_BOOKMARK_INVALID
, 1,
898 if (!(hdr
->flags
& ISCSI_FLAG_CMD_READ
) &&
899 !(hdr
->flags
& ISCSI_FLAG_CMD_WRITE
) && (hdr
->data_length
!= 0)) {
900 pr_err("ISCSI_FLAG_CMD_READ and/or ISCSI_FLAG_CMD_WRITE"
901 " MUST be set if Expected Data Transfer Length is not 0."
902 " Bad iSCSI Initiator\n");
903 return iscsit_add_reject(ISCSI_REASON_BOOKMARK_INVALID
, 1,
907 if ((hdr
->flags
& ISCSI_FLAG_CMD_READ
) &&
908 (hdr
->flags
& ISCSI_FLAG_CMD_WRITE
)) {
909 pr_err("Bidirectional operations not supported!\n");
910 return iscsit_add_reject(ISCSI_REASON_BOOKMARK_INVALID
, 1,
914 if (hdr
->opcode
& ISCSI_OP_IMMEDIATE
) {
915 pr_err("Illegally set Immediate Bit in iSCSI Initiator"
916 " Scsi Command PDU.\n");
917 return iscsit_add_reject(ISCSI_REASON_BOOKMARK_INVALID
, 1,
921 if (payload_length
&& !conn
->sess
->sess_ops
->ImmediateData
) {
922 pr_err("ImmediateData=No but DataSegmentLength=%u,"
923 " protocol error.\n", payload_length
);
924 return iscsit_add_reject(ISCSI_REASON_PROTOCOL_ERROR
, 1,
928 if ((hdr
->data_length
== payload_length
) &&
929 (!(hdr
->flags
& ISCSI_FLAG_CMD_FINAL
))) {
930 pr_err("Expected Data Transfer Length and Length of"
931 " Immediate Data are the same, but ISCSI_FLAG_CMD_FINAL"
932 " bit is not set protocol error\n");
933 return iscsit_add_reject(ISCSI_REASON_PROTOCOL_ERROR
, 1,
937 if (payload_length
> hdr
->data_length
) {
938 pr_err("DataSegmentLength: %u is greater than"
939 " EDTL: %u, protocol error.\n", payload_length
,
941 return iscsit_add_reject(ISCSI_REASON_PROTOCOL_ERROR
, 1,
945 if (payload_length
> conn
->conn_ops
->MaxRecvDataSegmentLength
) {
946 pr_err("DataSegmentLength: %u is greater than"
947 " MaxRecvDataSegmentLength: %u, protocol error.\n",
948 payload_length
, conn
->conn_ops
->MaxRecvDataSegmentLength
);
949 return iscsit_add_reject(ISCSI_REASON_PROTOCOL_ERROR
, 1,
953 if (payload_length
> conn
->sess
->sess_ops
->FirstBurstLength
) {
954 pr_err("DataSegmentLength: %u is greater than"
955 " FirstBurstLength: %u, protocol error.\n",
956 payload_length
, conn
->sess
->sess_ops
->FirstBurstLength
);
957 return iscsit_add_reject(ISCSI_REASON_BOOKMARK_INVALID
, 1,
961 data_direction
= (hdr
->flags
& ISCSI_FLAG_CMD_WRITE
) ? DMA_TO_DEVICE
:
962 (hdr
->flags
& ISCSI_FLAG_CMD_READ
) ? DMA_FROM_DEVICE
:
965 cmd
= iscsit_allocate_se_cmd(conn
, hdr
->data_length
, data_direction
,
966 (hdr
->flags
& ISCSI_FLAG_CMD_ATTR_MASK
));
968 return iscsit_add_reject(ISCSI_REASON_BOOKMARK_NO_RESOURCES
, 1,
971 pr_debug("Got SCSI Command, ITT: 0x%08x, CmdSN: 0x%08x,"
972 " ExpXferLen: %u, Length: %u, CID: %hu\n", hdr
->itt
,
973 hdr
->cmdsn
, hdr
->data_length
, payload_length
, conn
->cid
);
975 cmd
->iscsi_opcode
= ISCSI_OP_SCSI_CMD
;
976 cmd
->i_state
= ISTATE_NEW_CMD
;
977 cmd
->immediate_cmd
= ((hdr
->opcode
& ISCSI_OP_IMMEDIATE
) ? 1 : 0);
978 cmd
->immediate_data
= (payload_length
) ? 1 : 0;
979 cmd
->unsolicited_data
= ((!(hdr
->flags
& ISCSI_FLAG_CMD_FINAL
) &&
980 (hdr
->flags
& ISCSI_FLAG_CMD_WRITE
)) ? 1 : 0);
981 if (cmd
->unsolicited_data
)
982 cmd
->cmd_flags
|= ICF_NON_IMMEDIATE_UNSOLICITED_DATA
;
984 conn
->sess
->init_task_tag
= cmd
->init_task_tag
= hdr
->itt
;
985 if (hdr
->flags
& ISCSI_FLAG_CMD_READ
) {
986 spin_lock_bh(&conn
->sess
->ttt_lock
);
987 cmd
->targ_xfer_tag
= conn
->sess
->targ_xfer_tag
++;
988 if (cmd
->targ_xfer_tag
== 0xFFFFFFFF)
989 cmd
->targ_xfer_tag
= conn
->sess
->targ_xfer_tag
++;
990 spin_unlock_bh(&conn
->sess
->ttt_lock
);
991 } else if (hdr
->flags
& ISCSI_FLAG_CMD_WRITE
)
992 cmd
->targ_xfer_tag
= 0xFFFFFFFF;
993 cmd
->cmd_sn
= hdr
->cmdsn
;
994 cmd
->exp_stat_sn
= hdr
->exp_statsn
;
995 cmd
->first_burst_len
= payload_length
;
997 if (cmd
->data_direction
== DMA_FROM_DEVICE
) {
998 struct iscsi_datain_req
*dr
;
1000 dr
= iscsit_allocate_datain_req();
1002 return iscsit_add_reject_from_cmd(
1003 ISCSI_REASON_BOOKMARK_NO_RESOURCES
,
1006 iscsit_attach_datain_req(cmd
, dr
);
1010 * The CDB is going to an se_device_t.
1012 ret
= iscsit_get_lun_for_cmd(cmd
, hdr
->cdb
,
1013 get_unaligned_le64(&hdr
->lun
));
1015 if (cmd
->se_cmd
.scsi_sense_reason
== TCM_NON_EXISTENT_LUN
) {
1016 pr_debug("Responding to non-acl'ed,"
1017 " non-existent or non-exported iSCSI LUN:"
1018 " 0x%016Lx\n", get_unaligned_le64(&hdr
->lun
));
1020 send_check_condition
= 1;
1024 * The Initiator Node has access to the LUN (the addressing method
1025 * is handled inside of iscsit_get_lun_for_cmd()). Now it's time to
1026 * allocate 1->N transport tasks (depending on sector count and
1027 * maximum request size the physical HBA(s) can handle.
1029 transport_ret
= transport_generic_allocate_tasks(&cmd
->se_cmd
, hdr
->cdb
);
1030 if (transport_ret
== -ENOMEM
) {
1031 return iscsit_add_reject_from_cmd(
1032 ISCSI_REASON_BOOKMARK_NO_RESOURCES
,
1034 } else if (transport_ret
== -EINVAL
) {
1036 * Unsupported SAM Opcode. CHECK_CONDITION will be sent
1037 * in iscsit_execute_cmd() during the CmdSN OOO Execution
1040 send_check_condition
= 1;
1042 if (iscsit_decide_list_to_build(cmd
, payload_length
) < 0)
1043 return iscsit_add_reject_from_cmd(
1044 ISCSI_REASON_BOOKMARK_NO_RESOURCES
,
1049 spin_lock_bh(&conn
->cmd_lock
);
1050 list_add_tail(&cmd
->i_list
, &conn
->conn_cmd_list
);
1051 spin_unlock_bh(&conn
->cmd_lock
);
1053 * Check if we need to delay processing because of ALUA
1054 * Active/NonOptimized primary access state..
1056 core_alua_check_nonop_delay(&cmd
->se_cmd
);
1058 * Allocate and setup SGL used with transport_generic_map_mem_to_cmd().
1059 * also call iscsit_allocate_iovecs()
1061 ret
= iscsit_alloc_buffs(cmd
);
1063 return iscsit_add_reject_from_cmd(
1064 ISCSI_REASON_BOOKMARK_NO_RESOURCES
,
1067 * Check the CmdSN against ExpCmdSN/MaxCmdSN here if
1068 * the Immediate Bit is not set, and no Immediate
1071 * A PDU/CmdSN carrying Immediate Data can only
1072 * be processed after the DataCRC has passed.
1073 * If the DataCRC fails, the CmdSN MUST NOT
1074 * be acknowledged. (See below)
1076 if (!cmd
->immediate_data
) {
1077 cmdsn_ret
= iscsit_sequence_cmd(conn
, cmd
, hdr
->cmdsn
);
1078 if (cmdsn_ret
== CMDSN_LOWER_THAN_EXP
)
1080 else if (cmdsn_ret
== CMDSN_ERROR_CANNOT_RECOVER
)
1081 return iscsit_add_reject_from_cmd(
1082 ISCSI_REASON_PROTOCOL_ERROR
,
1086 iscsit_ack_from_expstatsn(conn
, hdr
->exp_statsn
);
1089 * If no Immediate Data is attached, it's OK to return now.
1091 if (!cmd
->immediate_data
) {
1092 if (send_check_condition
)
1095 if (cmd
->unsolicited_data
) {
1096 iscsit_set_dataout_sequence_values(cmd
);
1098 spin_lock_bh(&cmd
->dataout_timeout_lock
);
1099 iscsit_start_dataout_timer(cmd
, cmd
->conn
);
1100 spin_unlock_bh(&cmd
->dataout_timeout_lock
);
1107 * Early CHECK_CONDITIONs never make it to the transport processing
1108 * thread. They are processed in CmdSN order by
1109 * iscsit_check_received_cmdsn() below.
1111 if (send_check_condition
) {
1112 immed_ret
= IMMEDIATE_DATA_NORMAL_OPERATION
;
1113 dump_immediate_data
= 1;
1114 goto after_immediate_data
;
1117 * Call directly into transport_generic_new_cmd() to perform
1118 * the backend memory allocation.
1120 ret
= transport_generic_new_cmd(&cmd
->se_cmd
);
1122 immed_ret
= IMMEDIATE_DATA_NORMAL_OPERATION
;
1123 dump_immediate_data
= 1;
1124 goto after_immediate_data
;
1127 immed_ret
= iscsit_handle_immediate_data(cmd
, buf
, payload_length
);
1128 after_immediate_data
:
1129 if (immed_ret
== IMMEDIATE_DATA_NORMAL_OPERATION
) {
1131 * A PDU/CmdSN carrying Immediate Data passed
1132 * DataCRC, check against ExpCmdSN/MaxCmdSN if
1133 * Immediate Bit is not set.
1135 cmdsn_ret
= iscsit_sequence_cmd(conn
, cmd
, hdr
->cmdsn
);
1137 * Special case for Unsupported SAM WRITE Opcodes
1138 * and ImmediateData=Yes.
1140 if (dump_immediate_data
) {
1141 if (iscsit_dump_data_payload(conn
, payload_length
, 1) < 0)
1143 } else if (cmd
->unsolicited_data
) {
1144 iscsit_set_dataout_sequence_values(cmd
);
1146 spin_lock_bh(&cmd
->dataout_timeout_lock
);
1147 iscsit_start_dataout_timer(cmd
, cmd
->conn
);
1148 spin_unlock_bh(&cmd
->dataout_timeout_lock
);
1151 if (cmdsn_ret
== CMDSN_ERROR_CANNOT_RECOVER
)
1152 return iscsit_add_reject_from_cmd(
1153 ISCSI_REASON_PROTOCOL_ERROR
,
1156 } else if (immed_ret
== IMMEDIATE_DATA_ERL1_CRC_FAILURE
) {
1158 * Immediate Data failed DataCRC and ERL>=1,
1159 * silently drop this PDU and let the initiator
1160 * plug the CmdSN gap.
1162 * FIXME: Send Unsolicited NOPIN with reserved
1163 * TTT here to help the initiator figure out
1164 * the missing CmdSN, although they should be
1165 * intelligent enough to determine the missing
1166 * CmdSN and issue a retry to plug the sequence.
1168 cmd
->i_state
= ISTATE_REMOVE
;
1169 iscsit_add_cmd_to_immediate_queue(cmd
, conn
, cmd
->i_state
);
1170 } else /* immed_ret == IMMEDIATE_DATA_CANNOT_RECOVER */
1176 static u32
iscsit_do_crypto_hash_sg(
1177 struct hash_desc
*hash
,
1178 struct iscsi_cmd
*cmd
,
1186 struct scatterlist
*sg
;
1187 unsigned int page_off
;
1189 crypto_hash_init(hash
);
1191 sg
= cmd
->first_data_sg
;
1192 page_off
= cmd
->first_data_sg_off
;
1195 while (data_length
) {
1196 u32 cur_len
= min_t(u32
, data_length
, (sg
[i
].length
- page_off
));
1198 crypto_hash_update(hash
, &sg
[i
], cur_len
);
1200 data_length
-= cur_len
;
1206 struct scatterlist pad_sg
;
1208 sg_init_one(&pad_sg
, pad_bytes
, padding
);
1209 crypto_hash_update(hash
, &pad_sg
, padding
);
1211 crypto_hash_final(hash
, (u8
*) &data_crc
);
1216 static void iscsit_do_crypto_hash_buf(
1217 struct hash_desc
*hash
,
1224 struct scatterlist sg
;
1226 crypto_hash_init(hash
);
1228 sg_init_one(&sg
, (u8
*)buf
, payload_length
);
1229 crypto_hash_update(hash
, &sg
, payload_length
);
1232 sg_init_one(&sg
, pad_bytes
, padding
);
1233 crypto_hash_update(hash
, &sg
, padding
);
1235 crypto_hash_final(hash
, data_crc
);
1238 static int iscsit_handle_data_out(struct iscsi_conn
*conn
, unsigned char *buf
)
1240 int iov_ret
, ooo_cmdsn
= 0, ret
;
1241 u8 data_crc_failed
= 0;
1242 u32 checksum
, iov_count
= 0, padding
= 0, rx_got
= 0;
1243 u32 rx_size
= 0, payload_length
;
1244 struct iscsi_cmd
*cmd
= NULL
;
1245 struct se_cmd
*se_cmd
;
1246 struct iscsi_data
*hdr
;
1248 unsigned long flags
;
1250 hdr
= (struct iscsi_data
*) buf
;
1251 payload_length
= ntoh24(hdr
->dlength
);
1252 hdr
->itt
= be32_to_cpu(hdr
->itt
);
1253 hdr
->ttt
= be32_to_cpu(hdr
->ttt
);
1254 hdr
->exp_statsn
= be32_to_cpu(hdr
->exp_statsn
);
1255 hdr
->datasn
= be32_to_cpu(hdr
->datasn
);
1256 hdr
->offset
= be32_to_cpu(hdr
->offset
);
1258 if (!payload_length
) {
1259 pr_err("DataOUT payload is ZERO, protocol error.\n");
1260 return iscsit_add_reject(ISCSI_REASON_PROTOCOL_ERROR
, 1,
1265 spin_lock_bh(&conn
->sess
->session_stats_lock
);
1266 conn
->sess
->rx_data_octets
+= payload_length
;
1267 if (conn
->sess
->se_sess
->se_node_acl
) {
1268 spin_lock(&conn
->sess
->se_sess
->se_node_acl
->stats_lock
);
1269 conn
->sess
->se_sess
->se_node_acl
->write_bytes
+= payload_length
;
1270 spin_unlock(&conn
->sess
->se_sess
->se_node_acl
->stats_lock
);
1272 spin_unlock_bh(&conn
->sess
->session_stats_lock
);
1274 if (payload_length
> conn
->conn_ops
->MaxRecvDataSegmentLength
) {
1275 pr_err("DataSegmentLength: %u is greater than"
1276 " MaxRecvDataSegmentLength: %u\n", payload_length
,
1277 conn
->conn_ops
->MaxRecvDataSegmentLength
);
1278 return iscsit_add_reject(ISCSI_REASON_PROTOCOL_ERROR
, 1,
1282 cmd
= iscsit_find_cmd_from_itt_or_dump(conn
, hdr
->itt
,
1287 pr_debug("Got DataOut ITT: 0x%08x, TTT: 0x%08x,"
1288 " DataSN: 0x%08x, Offset: %u, Length: %u, CID: %hu\n",
1289 hdr
->itt
, hdr
->ttt
, hdr
->datasn
, hdr
->offset
,
1290 payload_length
, conn
->cid
);
1292 if (cmd
->cmd_flags
& ICF_GOT_LAST_DATAOUT
) {
1293 pr_err("Command ITT: 0x%08x received DataOUT after"
1294 " last DataOUT received, dumping payload\n",
1295 cmd
->init_task_tag
);
1296 return iscsit_dump_data_payload(conn
, payload_length
, 1);
1299 if (cmd
->data_direction
!= DMA_TO_DEVICE
) {
1300 pr_err("Command ITT: 0x%08x received DataOUT for a"
1301 " NON-WRITE command.\n", cmd
->init_task_tag
);
1302 return iscsit_add_reject_from_cmd(ISCSI_REASON_PROTOCOL_ERROR
,
1305 se_cmd
= &cmd
->se_cmd
;
1306 iscsit_mod_dataout_timer(cmd
);
1308 if ((hdr
->offset
+ payload_length
) > cmd
->data_length
) {
1309 pr_err("DataOut Offset: %u, Length %u greater than"
1310 " iSCSI Command EDTL %u, protocol error.\n",
1311 hdr
->offset
, payload_length
, cmd
->data_length
);
1312 return iscsit_add_reject_from_cmd(ISCSI_REASON_BOOKMARK_INVALID
,
1316 if (cmd
->unsolicited_data
) {
1317 int dump_unsolicited_data
= 0;
1319 if (conn
->sess
->sess_ops
->InitialR2T
) {
1320 pr_err("Received unexpected unsolicited data"
1321 " while InitialR2T=Yes, protocol error.\n");
1322 transport_send_check_condition_and_sense(&cmd
->se_cmd
,
1323 TCM_UNEXPECTED_UNSOLICITED_DATA
, 0);
1327 * Special case for dealing with Unsolicited DataOUT
1328 * and Unsupported SAM WRITE Opcodes and SE resource allocation
1332 /* Something's amiss if we're not in WRITE_PENDING state... */
1333 spin_lock_irqsave(&se_cmd
->t_state_lock
, flags
);
1334 WARN_ON(se_cmd
->t_state
!= TRANSPORT_WRITE_PENDING
);
1335 spin_unlock_irqrestore(&se_cmd
->t_state_lock
, flags
);
1337 spin_lock_irqsave(&se_cmd
->t_state_lock
, flags
);
1338 if (!(se_cmd
->se_cmd_flags
& SCF_SUPPORTED_SAM_OPCODE
) ||
1339 (se_cmd
->se_cmd_flags
& SCF_SCSI_CDB_EXCEPTION
))
1340 dump_unsolicited_data
= 1;
1341 spin_unlock_irqrestore(&se_cmd
->t_state_lock
, flags
);
1343 if (dump_unsolicited_data
) {
1345 * Check if a delayed TASK_ABORTED status needs to
1346 * be sent now if the ISCSI_FLAG_CMD_FINAL has been
1347 * received with the unsolicitied data out.
1349 if (hdr
->flags
& ISCSI_FLAG_CMD_FINAL
)
1350 iscsit_stop_dataout_timer(cmd
);
1352 transport_check_aborted_status(se_cmd
,
1353 (hdr
->flags
& ISCSI_FLAG_CMD_FINAL
));
1354 return iscsit_dump_data_payload(conn
, payload_length
, 1);
1358 * For the normal solicited data path:
1360 * Check for a delayed TASK_ABORTED status and dump any
1361 * incoming data out payload if one exists. Also, when the
1362 * ISCSI_FLAG_CMD_FINAL is set to denote the end of the current
1363 * data out sequence, we decrement outstanding_r2ts. Once
1364 * outstanding_r2ts reaches zero, go ahead and send the delayed
1365 * TASK_ABORTED status.
1367 if (atomic_read(&se_cmd
->t_transport_aborted
) != 0) {
1368 if (hdr
->flags
& ISCSI_FLAG_CMD_FINAL
)
1369 if (--cmd
->outstanding_r2ts
< 1) {
1370 iscsit_stop_dataout_timer(cmd
);
1371 transport_check_aborted_status(
1375 return iscsit_dump_data_payload(conn
, payload_length
, 1);
1379 * Preform DataSN, DataSequenceInOrder, DataPDUInOrder, and
1380 * within-command recovery checks before receiving the payload.
1382 ret
= iscsit_check_pre_dataout(cmd
, buf
);
1383 if (ret
== DATAOUT_WITHIN_COMMAND_RECOVERY
)
1385 else if (ret
== DATAOUT_CANNOT_RECOVER
)
1388 rx_size
+= payload_length
;
1389 iov
= &cmd
->iov_data
[0];
1391 iov_ret
= iscsit_map_iovec(cmd
, iov
, hdr
->offset
, payload_length
);
1395 iov_count
+= iov_ret
;
1397 padding
= ((-payload_length
) & 3);
1399 iov
[iov_count
].iov_base
= cmd
->pad_bytes
;
1400 iov
[iov_count
++].iov_len
= padding
;
1402 pr_debug("Receiving %u padding bytes.\n", padding
);
1405 if (conn
->conn_ops
->DataDigest
) {
1406 iov
[iov_count
].iov_base
= &checksum
;
1407 iov
[iov_count
++].iov_len
= ISCSI_CRC_LEN
;
1408 rx_size
+= ISCSI_CRC_LEN
;
1411 rx_got
= rx_data(conn
, &cmd
->iov_data
[0], iov_count
, rx_size
);
1413 iscsit_unmap_iovec(cmd
);
1415 if (rx_got
!= rx_size
)
1418 if (conn
->conn_ops
->DataDigest
) {
1421 data_crc
= iscsit_do_crypto_hash_sg(&conn
->conn_rx_hash
, cmd
,
1422 hdr
->offset
, payload_length
, padding
,
1425 if (checksum
!= data_crc
) {
1426 pr_err("ITT: 0x%08x, Offset: %u, Length: %u,"
1427 " DataSN: 0x%08x, CRC32C DataDigest 0x%08x"
1428 " does not match computed 0x%08x\n",
1429 hdr
->itt
, hdr
->offset
, payload_length
,
1430 hdr
->datasn
, checksum
, data_crc
);
1431 data_crc_failed
= 1;
1433 pr_debug("Got CRC32C DataDigest 0x%08x for"
1434 " %u bytes of Data Out\n", checksum
,
1439 * Increment post receive data and CRC values or perform
1440 * within-command recovery.
1442 ret
= iscsit_check_post_dataout(cmd
, buf
, data_crc_failed
);
1443 if ((ret
== DATAOUT_NORMAL
) || (ret
== DATAOUT_WITHIN_COMMAND_RECOVERY
))
1445 else if (ret
== DATAOUT_SEND_R2T
) {
1446 iscsit_set_dataout_sequence_values(cmd
);
1447 iscsit_build_r2ts_for_cmd(cmd
, conn
, 0);
1448 } else if (ret
== DATAOUT_SEND_TO_TRANSPORT
) {
1450 * Handle extra special case for out of order
1451 * Unsolicited Data Out.
1453 spin_lock_bh(&cmd
->istate_lock
);
1454 ooo_cmdsn
= (cmd
->cmd_flags
& ICF_OOO_CMDSN
);
1455 cmd
->cmd_flags
|= ICF_GOT_LAST_DATAOUT
;
1456 cmd
->i_state
= ISTATE_RECEIVED_LAST_DATAOUT
;
1457 spin_unlock_bh(&cmd
->istate_lock
);
1459 iscsit_stop_dataout_timer(cmd
);
1460 return (!ooo_cmdsn
) ? transport_generic_handle_data(
1462 } else /* DATAOUT_CANNOT_RECOVER */
1468 static int iscsit_handle_nop_out(
1469 struct iscsi_conn
*conn
,
1472 unsigned char *ping_data
= NULL
;
1473 int cmdsn_ret
, niov
= 0, ret
= 0, rx_got
, rx_size
;
1474 u32 checksum
, data_crc
, padding
= 0, payload_length
;
1476 struct iscsi_cmd
*cmd
= NULL
;
1477 struct kvec
*iov
= NULL
;
1478 struct iscsi_nopout
*hdr
;
1480 hdr
= (struct iscsi_nopout
*) buf
;
1481 payload_length
= ntoh24(hdr
->dlength
);
1482 lun
= get_unaligned_le64(&hdr
->lun
);
1483 hdr
->itt
= be32_to_cpu(hdr
->itt
);
1484 hdr
->ttt
= be32_to_cpu(hdr
->ttt
);
1485 hdr
->cmdsn
= be32_to_cpu(hdr
->cmdsn
);
1486 hdr
->exp_statsn
= be32_to_cpu(hdr
->exp_statsn
);
1488 if ((hdr
->itt
== 0xFFFFFFFF) && !(hdr
->opcode
& ISCSI_OP_IMMEDIATE
)) {
1489 pr_err("NOPOUT ITT is reserved, but Immediate Bit is"
1490 " not set, protocol error.\n");
1491 return iscsit_add_reject(ISCSI_REASON_PROTOCOL_ERROR
, 1,
1495 if (payload_length
> conn
->conn_ops
->MaxRecvDataSegmentLength
) {
1496 pr_err("NOPOUT Ping Data DataSegmentLength: %u is"
1497 " greater than MaxRecvDataSegmentLength: %u, protocol"
1498 " error.\n", payload_length
,
1499 conn
->conn_ops
->MaxRecvDataSegmentLength
);
1500 return iscsit_add_reject(ISCSI_REASON_PROTOCOL_ERROR
, 1,
1504 pr_debug("Got NOPOUT Ping %s ITT: 0x%08x, TTT: 0x%09x,"
1505 " CmdSN: 0x%08x, ExpStatSN: 0x%08x, Length: %u\n",
1506 (hdr
->itt
== 0xFFFFFFFF) ? "Response" : "Request",
1507 hdr
->itt
, hdr
->ttt
, hdr
->cmdsn
, hdr
->exp_statsn
,
1510 * This is not a response to a Unsolicited NopIN, which means
1511 * it can either be a NOPOUT ping request (with a valid ITT),
1512 * or a NOPOUT not requesting a NOPIN (with a reserved ITT).
1513 * Either way, make sure we allocate an struct iscsi_cmd, as both
1514 * can contain ping data.
1516 if (hdr
->ttt
== 0xFFFFFFFF) {
1517 cmd
= iscsit_allocate_cmd(conn
, GFP_KERNEL
);
1519 return iscsit_add_reject(
1520 ISCSI_REASON_BOOKMARK_NO_RESOURCES
,
1523 cmd
->iscsi_opcode
= ISCSI_OP_NOOP_OUT
;
1524 cmd
->i_state
= ISTATE_SEND_NOPIN
;
1525 cmd
->immediate_cmd
= ((hdr
->opcode
& ISCSI_OP_IMMEDIATE
) ?
1527 conn
->sess
->init_task_tag
= cmd
->init_task_tag
= hdr
->itt
;
1528 cmd
->targ_xfer_tag
= 0xFFFFFFFF;
1529 cmd
->cmd_sn
= hdr
->cmdsn
;
1530 cmd
->exp_stat_sn
= hdr
->exp_statsn
;
1531 cmd
->data_direction
= DMA_NONE
;
1534 if (payload_length
&& (hdr
->ttt
== 0xFFFFFFFF)) {
1535 rx_size
= payload_length
;
1536 ping_data
= kzalloc(payload_length
+ 1, GFP_KERNEL
);
1538 pr_err("Unable to allocate memory for"
1539 " NOPOUT ping data.\n");
1544 iov
= &cmd
->iov_misc
[0];
1545 iov
[niov
].iov_base
= ping_data
;
1546 iov
[niov
++].iov_len
= payload_length
;
1548 padding
= ((-payload_length
) & 3);
1550 pr_debug("Receiving %u additional bytes"
1551 " for padding.\n", padding
);
1552 iov
[niov
].iov_base
= &cmd
->pad_bytes
;
1553 iov
[niov
++].iov_len
= padding
;
1556 if (conn
->conn_ops
->DataDigest
) {
1557 iov
[niov
].iov_base
= &checksum
;
1558 iov
[niov
++].iov_len
= ISCSI_CRC_LEN
;
1559 rx_size
+= ISCSI_CRC_LEN
;
1562 rx_got
= rx_data(conn
, &cmd
->iov_misc
[0], niov
, rx_size
);
1563 if (rx_got
!= rx_size
) {
1568 if (conn
->conn_ops
->DataDigest
) {
1569 iscsit_do_crypto_hash_buf(&conn
->conn_rx_hash
,
1570 ping_data
, payload_length
,
1571 padding
, cmd
->pad_bytes
,
1574 if (checksum
!= data_crc
) {
1575 pr_err("Ping data CRC32C DataDigest"
1576 " 0x%08x does not match computed 0x%08x\n",
1577 checksum
, data_crc
);
1578 if (!conn
->sess
->sess_ops
->ErrorRecoveryLevel
) {
1579 pr_err("Unable to recover from"
1580 " NOPOUT Ping DataCRC failure while in"
1586 * Silently drop this PDU and let the
1587 * initiator plug the CmdSN gap.
1589 pr_debug("Dropping NOPOUT"
1590 " Command CmdSN: 0x%08x due to"
1591 " DataCRC error.\n", hdr
->cmdsn
);
1596 pr_debug("Got CRC32C DataDigest"
1597 " 0x%08x for %u bytes of ping data.\n",
1598 checksum
, payload_length
);
1602 ping_data
[payload_length
] = '\0';
1604 * Attach ping data to struct iscsi_cmd->buf_ptr.
1606 cmd
->buf_ptr
= (void *)ping_data
;
1607 cmd
->buf_ptr_size
= payload_length
;
1609 pr_debug("Got %u bytes of NOPOUT ping"
1610 " data.\n", payload_length
);
1611 pr_debug("Ping Data: \"%s\"\n", ping_data
);
1614 if (hdr
->itt
!= 0xFFFFFFFF) {
1616 pr_err("Checking CmdSN for NOPOUT,"
1617 " but cmd is NULL!\n");
1621 * Initiator is expecting a NopIN ping reply,
1623 spin_lock_bh(&conn
->cmd_lock
);
1624 list_add_tail(&cmd
->i_list
, &conn
->conn_cmd_list
);
1625 spin_unlock_bh(&conn
->cmd_lock
);
1627 iscsit_ack_from_expstatsn(conn
, hdr
->exp_statsn
);
1629 if (hdr
->opcode
& ISCSI_OP_IMMEDIATE
) {
1630 iscsit_add_cmd_to_response_queue(cmd
, conn
,
1635 cmdsn_ret
= iscsit_sequence_cmd(conn
, cmd
, hdr
->cmdsn
);
1636 if (cmdsn_ret
== CMDSN_LOWER_THAN_EXP
) {
1640 if (cmdsn_ret
== CMDSN_ERROR_CANNOT_RECOVER
)
1641 return iscsit_add_reject_from_cmd(
1642 ISCSI_REASON_PROTOCOL_ERROR
,
1648 if (hdr
->ttt
!= 0xFFFFFFFF) {
1650 * This was a response to a unsolicited NOPIN ping.
1652 cmd
= iscsit_find_cmd_from_ttt(conn
, hdr
->ttt
);
1656 iscsit_stop_nopin_response_timer(conn
);
1658 cmd
->i_state
= ISTATE_REMOVE
;
1659 iscsit_add_cmd_to_immediate_queue(cmd
, conn
, cmd
->i_state
);
1660 iscsit_start_nopin_timer(conn
);
1663 * Initiator is not expecting a NOPIN is response.
1664 * Just ignore for now.
1666 * iSCSI v19-91 10.18
1667 * "A NOP-OUT may also be used to confirm a changed
1668 * ExpStatSN if another PDU will not be available
1678 iscsit_release_cmd(cmd
);
1684 static int iscsit_handle_task_mgt_cmd(
1685 struct iscsi_conn
*conn
,
1688 struct iscsi_cmd
*cmd
;
1689 struct se_tmr_req
*se_tmr
;
1690 struct iscsi_tmr_req
*tmr_req
;
1691 struct iscsi_tm
*hdr
;
1693 int out_of_order_cmdsn
= 0;
1697 hdr
= (struct iscsi_tm
*) buf
;
1698 payload_length
= ntoh24(hdr
->dlength
);
1699 hdr
->itt
= be32_to_cpu(hdr
->itt
);
1700 hdr
->rtt
= be32_to_cpu(hdr
->rtt
);
1701 hdr
->cmdsn
= be32_to_cpu(hdr
->cmdsn
);
1702 hdr
->exp_statsn
= be32_to_cpu(hdr
->exp_statsn
);
1703 hdr
->refcmdsn
= be32_to_cpu(hdr
->refcmdsn
);
1704 hdr
->exp_datasn
= be32_to_cpu(hdr
->exp_datasn
);
1705 hdr
->flags
&= ~ISCSI_FLAG_CMD_FINAL
;
1706 function
= hdr
->flags
;
1708 pr_debug("Got Task Management Request ITT: 0x%08x, CmdSN:"
1709 " 0x%08x, Function: 0x%02x, RefTaskTag: 0x%08x, RefCmdSN:"
1710 " 0x%08x, CID: %hu\n", hdr
->itt
, hdr
->cmdsn
, function
,
1711 hdr
->rtt
, hdr
->refcmdsn
, conn
->cid
);
1713 if ((function
!= ISCSI_TM_FUNC_ABORT_TASK
) &&
1714 ((function
!= ISCSI_TM_FUNC_TASK_REASSIGN
) &&
1715 (hdr
->rtt
!= ISCSI_RESERVED_TAG
))) {
1716 pr_err("RefTaskTag should be set to 0xFFFFFFFF.\n");
1717 hdr
->rtt
= ISCSI_RESERVED_TAG
;
1720 if ((function
== ISCSI_TM_FUNC_TASK_REASSIGN
) &&
1721 !(hdr
->opcode
& ISCSI_OP_IMMEDIATE
)) {
1722 pr_err("Task Management Request TASK_REASSIGN not"
1723 " issued as immediate command, bad iSCSI Initiator"
1724 "implementation\n");
1725 return iscsit_add_reject(ISCSI_REASON_PROTOCOL_ERROR
, 1,
1728 if ((function
!= ISCSI_TM_FUNC_ABORT_TASK
) &&
1729 (hdr
->refcmdsn
!= ISCSI_RESERVED_TAG
))
1730 hdr
->refcmdsn
= ISCSI_RESERVED_TAG
;
1732 cmd
= iscsit_allocate_se_cmd_for_tmr(conn
, function
);
1734 return iscsit_add_reject(ISCSI_REASON_BOOKMARK_NO_RESOURCES
,
1737 cmd
->iscsi_opcode
= ISCSI_OP_SCSI_TMFUNC
;
1738 cmd
->i_state
= ISTATE_SEND_TASKMGTRSP
;
1739 cmd
->immediate_cmd
= ((hdr
->opcode
& ISCSI_OP_IMMEDIATE
) ? 1 : 0);
1740 cmd
->init_task_tag
= hdr
->itt
;
1741 cmd
->targ_xfer_tag
= 0xFFFFFFFF;
1742 cmd
->cmd_sn
= hdr
->cmdsn
;
1743 cmd
->exp_stat_sn
= hdr
->exp_statsn
;
1744 se_tmr
= cmd
->se_cmd
.se_tmr_req
;
1745 tmr_req
= cmd
->tmr_req
;
1747 * Locate the struct se_lun for all TMRs not related to ERL=2 TASK_REASSIGN
1749 if (function
!= ISCSI_TM_FUNC_TASK_REASSIGN
) {
1750 ret
= iscsit_get_lun_for_tmr(cmd
,
1751 get_unaligned_le64(&hdr
->lun
));
1753 cmd
->se_cmd
.se_cmd_flags
|= SCF_SCSI_CDB_EXCEPTION
;
1754 se_tmr
->response
= ISCSI_TMF_RSP_NO_LUN
;
1760 case ISCSI_TM_FUNC_ABORT_TASK
:
1761 se_tmr
->response
= iscsit_tmr_abort_task(cmd
, buf
);
1762 if (se_tmr
->response
!= ISCSI_TMF_RSP_COMPLETE
) {
1763 cmd
->se_cmd
.se_cmd_flags
|= SCF_SCSI_CDB_EXCEPTION
;
1767 case ISCSI_TM_FUNC_ABORT_TASK_SET
:
1768 case ISCSI_TM_FUNC_CLEAR_ACA
:
1769 case ISCSI_TM_FUNC_CLEAR_TASK_SET
:
1770 case ISCSI_TM_FUNC_LOGICAL_UNIT_RESET
:
1772 case ISCSI_TM_FUNC_TARGET_WARM_RESET
:
1773 if (iscsit_tmr_task_warm_reset(conn
, tmr_req
, buf
) < 0) {
1774 cmd
->se_cmd
.se_cmd_flags
|= SCF_SCSI_CDB_EXCEPTION
;
1775 se_tmr
->response
= ISCSI_TMF_RSP_AUTH_FAILED
;
1779 case ISCSI_TM_FUNC_TARGET_COLD_RESET
:
1780 if (iscsit_tmr_task_cold_reset(conn
, tmr_req
, buf
) < 0) {
1781 cmd
->se_cmd
.se_cmd_flags
|= SCF_SCSI_CDB_EXCEPTION
;
1782 se_tmr
->response
= ISCSI_TMF_RSP_AUTH_FAILED
;
1786 case ISCSI_TM_FUNC_TASK_REASSIGN
:
1787 se_tmr
->response
= iscsit_tmr_task_reassign(cmd
, buf
);
1789 * Perform sanity checks on the ExpDataSN only if the
1790 * TASK_REASSIGN was successful.
1792 if (se_tmr
->response
!= ISCSI_TMF_RSP_COMPLETE
)
1795 if (iscsit_check_task_reassign_expdatasn(tmr_req
, conn
) < 0)
1796 return iscsit_add_reject_from_cmd(
1797 ISCSI_REASON_BOOKMARK_INVALID
, 1, 1,
1801 pr_err("Unknown TMR function: 0x%02x, protocol"
1802 " error.\n", function
);
1803 cmd
->se_cmd
.se_cmd_flags
|= SCF_SCSI_CDB_EXCEPTION
;
1804 se_tmr
->response
= ISCSI_TMF_RSP_NOT_SUPPORTED
;
1808 if ((function
!= ISCSI_TM_FUNC_TASK_REASSIGN
) &&
1809 (se_tmr
->response
== ISCSI_TMF_RSP_COMPLETE
))
1810 se_tmr
->call_transport
= 1;
1812 spin_lock_bh(&conn
->cmd_lock
);
1813 list_add_tail(&cmd
->i_list
, &conn
->conn_cmd_list
);
1814 spin_unlock_bh(&conn
->cmd_lock
);
1816 if (!(hdr
->opcode
& ISCSI_OP_IMMEDIATE
)) {
1817 int cmdsn_ret
= iscsit_sequence_cmd(conn
, cmd
, hdr
->cmdsn
);
1818 if (cmdsn_ret
== CMDSN_HIGHER_THAN_EXP
)
1819 out_of_order_cmdsn
= 1;
1820 else if (cmdsn_ret
== CMDSN_LOWER_THAN_EXP
)
1822 else if (cmdsn_ret
== CMDSN_ERROR_CANNOT_RECOVER
)
1823 return iscsit_add_reject_from_cmd(
1824 ISCSI_REASON_PROTOCOL_ERROR
,
1827 iscsit_ack_from_expstatsn(conn
, hdr
->exp_statsn
);
1829 if (out_of_order_cmdsn
|| !(hdr
->opcode
& ISCSI_OP_IMMEDIATE
))
1832 * Found the referenced task, send to transport for processing.
1834 if (se_tmr
->call_transport
)
1835 return transport_generic_handle_tmr(&cmd
->se_cmd
);
1838 * Could not find the referenced LUN, task, or Task Management
1839 * command not authorized or supported. Change state and
1840 * let the tx_thread send the response.
1842 * For connection recovery, this is also the default action for
1843 * TMR TASK_REASSIGN.
1845 iscsit_add_cmd_to_response_queue(cmd
, conn
, cmd
->i_state
);
1849 /* #warning FIXME: Support Text Command parameters besides SendTargets */
1850 static int iscsit_handle_text_cmd(
1851 struct iscsi_conn
*conn
,
1854 char *text_ptr
, *text_in
;
1855 int cmdsn_ret
, niov
= 0, rx_got
, rx_size
;
1856 u32 checksum
= 0, data_crc
= 0, payload_length
;
1857 u32 padding
= 0, pad_bytes
= 0, text_length
= 0;
1858 struct iscsi_cmd
*cmd
;
1860 struct iscsi_text
*hdr
;
1862 hdr
= (struct iscsi_text
*) buf
;
1863 payload_length
= ntoh24(hdr
->dlength
);
1864 hdr
->itt
= be32_to_cpu(hdr
->itt
);
1865 hdr
->ttt
= be32_to_cpu(hdr
->ttt
);
1866 hdr
->cmdsn
= be32_to_cpu(hdr
->cmdsn
);
1867 hdr
->exp_statsn
= be32_to_cpu(hdr
->exp_statsn
);
1869 if (payload_length
> conn
->conn_ops
->MaxRecvDataSegmentLength
) {
1870 pr_err("Unable to accept text parameter length: %u"
1871 "greater than MaxRecvDataSegmentLength %u.\n",
1872 payload_length
, conn
->conn_ops
->MaxRecvDataSegmentLength
);
1873 return iscsit_add_reject(ISCSI_REASON_PROTOCOL_ERROR
, 1,
1877 pr_debug("Got Text Request: ITT: 0x%08x, CmdSN: 0x%08x,"
1878 " ExpStatSN: 0x%08x, Length: %u\n", hdr
->itt
, hdr
->cmdsn
,
1879 hdr
->exp_statsn
, payload_length
);
1881 rx_size
= text_length
= payload_length
;
1883 text_in
= kzalloc(text_length
, GFP_KERNEL
);
1885 pr_err("Unable to allocate memory for"
1886 " incoming text parameters\n");
1890 memset(iov
, 0, 3 * sizeof(struct kvec
));
1891 iov
[niov
].iov_base
= text_in
;
1892 iov
[niov
++].iov_len
= text_length
;
1894 padding
= ((-payload_length
) & 3);
1896 iov
[niov
].iov_base
= &pad_bytes
;
1897 iov
[niov
++].iov_len
= padding
;
1899 pr_debug("Receiving %u additional bytes"
1900 " for padding.\n", padding
);
1902 if (conn
->conn_ops
->DataDigest
) {
1903 iov
[niov
].iov_base
= &checksum
;
1904 iov
[niov
++].iov_len
= ISCSI_CRC_LEN
;
1905 rx_size
+= ISCSI_CRC_LEN
;
1908 rx_got
= rx_data(conn
, &iov
[0], niov
, rx_size
);
1909 if (rx_got
!= rx_size
) {
1914 if (conn
->conn_ops
->DataDigest
) {
1915 iscsit_do_crypto_hash_buf(&conn
->conn_rx_hash
,
1916 text_in
, text_length
,
1917 padding
, (u8
*)&pad_bytes
,
1920 if (checksum
!= data_crc
) {
1921 pr_err("Text data CRC32C DataDigest"
1922 " 0x%08x does not match computed"
1923 " 0x%08x\n", checksum
, data_crc
);
1924 if (!conn
->sess
->sess_ops
->ErrorRecoveryLevel
) {
1925 pr_err("Unable to recover from"
1926 " Text Data digest failure while in"
1932 * Silently drop this PDU and let the
1933 * initiator plug the CmdSN gap.
1935 pr_debug("Dropping Text"
1936 " Command CmdSN: 0x%08x due to"
1937 " DataCRC error.\n", hdr
->cmdsn
);
1942 pr_debug("Got CRC32C DataDigest"
1943 " 0x%08x for %u bytes of text data.\n",
1944 checksum
, text_length
);
1947 text_in
[text_length
- 1] = '\0';
1948 pr_debug("Successfully read %d bytes of text"
1949 " data.\n", text_length
);
1951 if (strncmp("SendTargets", text_in
, 11) != 0) {
1952 pr_err("Received Text Data that is not"
1953 " SendTargets, cannot continue.\n");
1957 text_ptr
= strchr(text_in
, '=');
1959 pr_err("No \"=\" separator found in Text Data,"
1960 " cannot continue.\n");
1964 if (strncmp("=All", text_ptr
, 4) != 0) {
1965 pr_err("Unable to locate All value for"
1966 " SendTargets key, cannot continue.\n");
1970 /*#warning Support SendTargets=(iSCSI Target Name/Nothing) values. */
1974 cmd
= iscsit_allocate_cmd(conn
, GFP_KERNEL
);
1976 return iscsit_add_reject(ISCSI_REASON_BOOKMARK_NO_RESOURCES
,
1979 cmd
->iscsi_opcode
= ISCSI_OP_TEXT
;
1980 cmd
->i_state
= ISTATE_SEND_TEXTRSP
;
1981 cmd
->immediate_cmd
= ((hdr
->opcode
& ISCSI_OP_IMMEDIATE
) ? 1 : 0);
1982 conn
->sess
->init_task_tag
= cmd
->init_task_tag
= hdr
->itt
;
1983 cmd
->targ_xfer_tag
= 0xFFFFFFFF;
1984 cmd
->cmd_sn
= hdr
->cmdsn
;
1985 cmd
->exp_stat_sn
= hdr
->exp_statsn
;
1986 cmd
->data_direction
= DMA_NONE
;
1988 spin_lock_bh(&conn
->cmd_lock
);
1989 list_add_tail(&cmd
->i_list
, &conn
->conn_cmd_list
);
1990 spin_unlock_bh(&conn
->cmd_lock
);
1992 iscsit_ack_from_expstatsn(conn
, hdr
->exp_statsn
);
1994 if (!(hdr
->opcode
& ISCSI_OP_IMMEDIATE
)) {
1995 cmdsn_ret
= iscsit_sequence_cmd(conn
, cmd
, hdr
->cmdsn
);
1996 if (cmdsn_ret
== CMDSN_ERROR_CANNOT_RECOVER
)
1997 return iscsit_add_reject_from_cmd(
1998 ISCSI_REASON_PROTOCOL_ERROR
,
2004 return iscsit_execute_cmd(cmd
, 0);
2007 int iscsit_logout_closesession(struct iscsi_cmd
*cmd
, struct iscsi_conn
*conn
)
2009 struct iscsi_conn
*conn_p
;
2010 struct iscsi_session
*sess
= conn
->sess
;
2012 pr_debug("Received logout request CLOSESESSION on CID: %hu"
2013 " for SID: %u.\n", conn
->cid
, conn
->sess
->sid
);
2015 atomic_set(&sess
->session_logout
, 1);
2016 atomic_set(&conn
->conn_logout_remove
, 1);
2017 conn
->conn_logout_reason
= ISCSI_LOGOUT_REASON_CLOSE_SESSION
;
2019 iscsit_inc_conn_usage_count(conn
);
2020 iscsit_inc_session_usage_count(sess
);
2022 spin_lock_bh(&sess
->conn_lock
);
2023 list_for_each_entry(conn_p
, &sess
->sess_conn_list
, conn_list
) {
2024 if (conn_p
->conn_state
!= TARG_CONN_STATE_LOGGED_IN
)
2027 pr_debug("Moving to TARG_CONN_STATE_IN_LOGOUT.\n");
2028 conn_p
->conn_state
= TARG_CONN_STATE_IN_LOGOUT
;
2030 spin_unlock_bh(&sess
->conn_lock
);
2032 iscsit_add_cmd_to_response_queue(cmd
, conn
, cmd
->i_state
);
2037 int iscsit_logout_closeconnection(struct iscsi_cmd
*cmd
, struct iscsi_conn
*conn
)
2039 struct iscsi_conn
*l_conn
;
2040 struct iscsi_session
*sess
= conn
->sess
;
2042 pr_debug("Received logout request CLOSECONNECTION for CID:"
2043 " %hu on CID: %hu.\n", cmd
->logout_cid
, conn
->cid
);
2046 * A Logout Request with a CLOSECONNECTION reason code for a CID
2047 * can arrive on a connection with a differing CID.
2049 if (conn
->cid
== cmd
->logout_cid
) {
2050 spin_lock_bh(&conn
->state_lock
);
2051 pr_debug("Moving to TARG_CONN_STATE_IN_LOGOUT.\n");
2052 conn
->conn_state
= TARG_CONN_STATE_IN_LOGOUT
;
2054 atomic_set(&conn
->conn_logout_remove
, 1);
2055 conn
->conn_logout_reason
= ISCSI_LOGOUT_REASON_CLOSE_CONNECTION
;
2056 iscsit_inc_conn_usage_count(conn
);
2058 spin_unlock_bh(&conn
->state_lock
);
2061 * Handle all different cid CLOSECONNECTION requests in
2062 * iscsit_logout_post_handler_diffcid() as to give enough
2063 * time for any non immediate command's CmdSN to be
2064 * acknowledged on the connection in question.
2066 * Here we simply make sure the CID is still around.
2068 l_conn
= iscsit_get_conn_from_cid(sess
,
2071 cmd
->logout_response
= ISCSI_LOGOUT_CID_NOT_FOUND
;
2072 iscsit_add_cmd_to_response_queue(cmd
, conn
,
2077 iscsit_dec_conn_usage_count(l_conn
);
2080 iscsit_add_cmd_to_response_queue(cmd
, conn
, cmd
->i_state
);
2085 int iscsit_logout_removeconnforrecovery(struct iscsi_cmd
*cmd
, struct iscsi_conn
*conn
)
2087 struct iscsi_session
*sess
= conn
->sess
;
2089 pr_debug("Received explicit REMOVECONNFORRECOVERY logout for"
2090 " CID: %hu on CID: %hu.\n", cmd
->logout_cid
, conn
->cid
);
2092 if (sess
->sess_ops
->ErrorRecoveryLevel
!= 2) {
2093 pr_err("Received Logout Request REMOVECONNFORRECOVERY"
2094 " while ERL!=2.\n");
2095 cmd
->logout_response
= ISCSI_LOGOUT_RECOVERY_UNSUPPORTED
;
2096 iscsit_add_cmd_to_response_queue(cmd
, conn
, cmd
->i_state
);
2100 if (conn
->cid
== cmd
->logout_cid
) {
2101 pr_err("Received Logout Request REMOVECONNFORRECOVERY"
2102 " with CID: %hu on CID: %hu, implementation error.\n",
2103 cmd
->logout_cid
, conn
->cid
);
2104 cmd
->logout_response
= ISCSI_LOGOUT_CLEANUP_FAILED
;
2105 iscsit_add_cmd_to_response_queue(cmd
, conn
, cmd
->i_state
);
2109 iscsit_add_cmd_to_response_queue(cmd
, conn
, cmd
->i_state
);
2114 static int iscsit_handle_logout_cmd(
2115 struct iscsi_conn
*conn
,
2118 int cmdsn_ret
, logout_remove
= 0;
2120 struct iscsi_cmd
*cmd
;
2121 struct iscsi_logout
*hdr
;
2122 struct iscsi_tiqn
*tiqn
= iscsit_snmp_get_tiqn(conn
);
2124 hdr
= (struct iscsi_logout
*) buf
;
2125 reason_code
= (hdr
->flags
& 0x7f);
2126 hdr
->itt
= be32_to_cpu(hdr
->itt
);
2127 hdr
->cid
= be16_to_cpu(hdr
->cid
);
2128 hdr
->cmdsn
= be32_to_cpu(hdr
->cmdsn
);
2129 hdr
->exp_statsn
= be32_to_cpu(hdr
->exp_statsn
);
2132 spin_lock(&tiqn
->logout_stats
.lock
);
2133 if (reason_code
== ISCSI_LOGOUT_REASON_CLOSE_SESSION
)
2134 tiqn
->logout_stats
.normal_logouts
++;
2136 tiqn
->logout_stats
.abnormal_logouts
++;
2137 spin_unlock(&tiqn
->logout_stats
.lock
);
2140 pr_debug("Got Logout Request ITT: 0x%08x CmdSN: 0x%08x"
2141 " ExpStatSN: 0x%08x Reason: 0x%02x CID: %hu on CID: %hu\n",
2142 hdr
->itt
, hdr
->cmdsn
, hdr
->exp_statsn
, reason_code
,
2143 hdr
->cid
, conn
->cid
);
2145 if (conn
->conn_state
!= TARG_CONN_STATE_LOGGED_IN
) {
2146 pr_err("Received logout request on connection that"
2147 " is not in logged in state, ignoring request.\n");
2151 cmd
= iscsit_allocate_cmd(conn
, GFP_KERNEL
);
2153 return iscsit_add_reject(ISCSI_REASON_BOOKMARK_NO_RESOURCES
, 1,
2156 cmd
->iscsi_opcode
= ISCSI_OP_LOGOUT
;
2157 cmd
->i_state
= ISTATE_SEND_LOGOUTRSP
;
2158 cmd
->immediate_cmd
= ((hdr
->opcode
& ISCSI_OP_IMMEDIATE
) ? 1 : 0);
2159 conn
->sess
->init_task_tag
= cmd
->init_task_tag
= hdr
->itt
;
2160 cmd
->targ_xfer_tag
= 0xFFFFFFFF;
2161 cmd
->cmd_sn
= hdr
->cmdsn
;
2162 cmd
->exp_stat_sn
= hdr
->exp_statsn
;
2163 cmd
->logout_cid
= hdr
->cid
;
2164 cmd
->logout_reason
= reason_code
;
2165 cmd
->data_direction
= DMA_NONE
;
2168 * We need to sleep in these cases (by returning 1) until the Logout
2169 * Response gets sent in the tx thread.
2171 if ((reason_code
== ISCSI_LOGOUT_REASON_CLOSE_SESSION
) ||
2172 ((reason_code
== ISCSI_LOGOUT_REASON_CLOSE_CONNECTION
) &&
2173 (hdr
->cid
== conn
->cid
)))
2176 spin_lock_bh(&conn
->cmd_lock
);
2177 list_add_tail(&cmd
->i_list
, &conn
->conn_cmd_list
);
2178 spin_unlock_bh(&conn
->cmd_lock
);
2180 if (reason_code
!= ISCSI_LOGOUT_REASON_RECOVERY
)
2181 iscsit_ack_from_expstatsn(conn
, hdr
->exp_statsn
);
2184 * Immediate commands are executed, well, immediately.
2185 * Non-Immediate Logout Commands are executed in CmdSN order.
2187 if (hdr
->opcode
& ISCSI_OP_IMMEDIATE
) {
2188 int ret
= iscsit_execute_cmd(cmd
, 0);
2193 cmdsn_ret
= iscsit_sequence_cmd(conn
, cmd
, hdr
->cmdsn
);
2194 if (cmdsn_ret
== CMDSN_LOWER_THAN_EXP
) {
2196 } else if (cmdsn_ret
== CMDSN_ERROR_CANNOT_RECOVER
) {
2197 return iscsit_add_reject_from_cmd(
2198 ISCSI_REASON_PROTOCOL_ERROR
,
2203 return logout_remove
;
2206 static int iscsit_handle_snack(
2207 struct iscsi_conn
*conn
,
2212 struct iscsi_snack
*hdr
;
2214 hdr
= (struct iscsi_snack
*) buf
;
2215 hdr
->flags
&= ~ISCSI_FLAG_CMD_FINAL
;
2216 lun
= get_unaligned_le64(&hdr
->lun
);
2217 unpacked_lun
= scsilun_to_int((struct scsi_lun
*)&lun
);
2218 hdr
->itt
= be32_to_cpu(hdr
->itt
);
2219 hdr
->ttt
= be32_to_cpu(hdr
->ttt
);
2220 hdr
->exp_statsn
= be32_to_cpu(hdr
->exp_statsn
);
2221 hdr
->begrun
= be32_to_cpu(hdr
->begrun
);
2222 hdr
->runlength
= be32_to_cpu(hdr
->runlength
);
2224 pr_debug("Got ISCSI_INIT_SNACK, ITT: 0x%08x, ExpStatSN:"
2225 " 0x%08x, Type: 0x%02x, BegRun: 0x%08x, RunLength: 0x%08x,"
2226 " CID: %hu\n", hdr
->itt
, hdr
->exp_statsn
, hdr
->flags
,
2227 hdr
->begrun
, hdr
->runlength
, conn
->cid
);
2229 if (!conn
->sess
->sess_ops
->ErrorRecoveryLevel
) {
2230 pr_err("Initiator sent SNACK request while in"
2231 " ErrorRecoveryLevel=0.\n");
2232 return iscsit_add_reject(ISCSI_REASON_PROTOCOL_ERROR
, 1,
2236 * SNACK_DATA and SNACK_R2T are both 0, so check which function to
2237 * call from inside iscsi_send_recovery_datain_or_r2t().
2239 switch (hdr
->flags
& ISCSI_FLAG_SNACK_TYPE_MASK
) {
2241 return iscsit_handle_recovery_datain_or_r2t(conn
, buf
,
2242 hdr
->itt
, hdr
->ttt
, hdr
->begrun
, hdr
->runlength
);
2243 case ISCSI_FLAG_SNACK_TYPE_STATUS
:
2244 return iscsit_handle_status_snack(conn
, hdr
->itt
, hdr
->ttt
,
2245 hdr
->begrun
, hdr
->runlength
);
2246 case ISCSI_FLAG_SNACK_TYPE_DATA_ACK
:
2247 return iscsit_handle_data_ack(conn
, hdr
->ttt
, hdr
->begrun
,
2249 case ISCSI_FLAG_SNACK_TYPE_RDATA
:
2250 /* FIXME: Support R-Data SNACK */
2251 pr_err("R-Data SNACK Not Supported.\n");
2252 return iscsit_add_reject(ISCSI_REASON_PROTOCOL_ERROR
, 1,
2255 pr_err("Unknown SNACK type 0x%02x, protocol"
2256 " error.\n", hdr
->flags
& 0x0f);
2257 return iscsit_add_reject(ISCSI_REASON_PROTOCOL_ERROR
, 1,
2264 static void iscsit_rx_thread_wait_for_tcp(struct iscsi_conn
*conn
)
2266 if ((conn
->sock
->sk
->sk_shutdown
& SEND_SHUTDOWN
) ||
2267 (conn
->sock
->sk
->sk_shutdown
& RCV_SHUTDOWN
)) {
2268 wait_for_completion_interruptible_timeout(
2269 &conn
->rx_half_close_comp
,
2270 ISCSI_RX_THREAD_TCP_TIMEOUT
* HZ
);
2274 static int iscsit_handle_immediate_data(
2275 struct iscsi_cmd
*cmd
,
2279 int iov_ret
, rx_got
= 0, rx_size
= 0;
2280 u32 checksum
, iov_count
= 0, padding
= 0;
2281 struct iscsi_conn
*conn
= cmd
->conn
;
2284 iov_ret
= iscsit_map_iovec(cmd
, cmd
->iov_data
, cmd
->write_data_done
, length
);
2286 return IMMEDIATE_DATA_CANNOT_RECOVER
;
2289 iov_count
= iov_ret
;
2290 iov
= &cmd
->iov_data
[0];
2292 padding
= ((-length
) & 3);
2294 iov
[iov_count
].iov_base
= cmd
->pad_bytes
;
2295 iov
[iov_count
++].iov_len
= padding
;
2299 if (conn
->conn_ops
->DataDigest
) {
2300 iov
[iov_count
].iov_base
= &checksum
;
2301 iov
[iov_count
++].iov_len
= ISCSI_CRC_LEN
;
2302 rx_size
+= ISCSI_CRC_LEN
;
2305 rx_got
= rx_data(conn
, &cmd
->iov_data
[0], iov_count
, rx_size
);
2307 iscsit_unmap_iovec(cmd
);
2309 if (rx_got
!= rx_size
) {
2310 iscsit_rx_thread_wait_for_tcp(conn
);
2311 return IMMEDIATE_DATA_CANNOT_RECOVER
;
2314 if (conn
->conn_ops
->DataDigest
) {
2317 data_crc
= iscsit_do_crypto_hash_sg(&conn
->conn_rx_hash
, cmd
,
2318 cmd
->write_data_done
, length
, padding
,
2321 if (checksum
!= data_crc
) {
2322 pr_err("ImmediateData CRC32C DataDigest 0x%08x"
2323 " does not match computed 0x%08x\n", checksum
,
2326 if (!conn
->sess
->sess_ops
->ErrorRecoveryLevel
) {
2327 pr_err("Unable to recover from"
2328 " Immediate Data digest failure while"
2330 iscsit_add_reject_from_cmd(
2331 ISCSI_REASON_DATA_DIGEST_ERROR
,
2333 return IMMEDIATE_DATA_CANNOT_RECOVER
;
2335 iscsit_add_reject_from_cmd(
2336 ISCSI_REASON_DATA_DIGEST_ERROR
,
2338 return IMMEDIATE_DATA_ERL1_CRC_FAILURE
;
2341 pr_debug("Got CRC32C DataDigest 0x%08x for"
2342 " %u bytes of Immediate Data\n", checksum
,
2347 cmd
->write_data_done
+= length
;
2349 if (cmd
->write_data_done
== cmd
->data_length
) {
2350 spin_lock_bh(&cmd
->istate_lock
);
2351 cmd
->cmd_flags
|= ICF_GOT_LAST_DATAOUT
;
2352 cmd
->i_state
= ISTATE_RECEIVED_LAST_DATAOUT
;
2353 spin_unlock_bh(&cmd
->istate_lock
);
2356 return IMMEDIATE_DATA_NORMAL_OPERATION
;
2360 * Called with sess->conn_lock held.
2362 /* #warning iscsi_build_conn_drop_async_message() only sends out on connections
2363 with active network interface */
2364 static void iscsit_build_conn_drop_async_message(struct iscsi_conn
*conn
)
2366 struct iscsi_cmd
*cmd
;
2367 struct iscsi_conn
*conn_p
;
2370 * Only send a Asynchronous Message on connections whos network
2371 * interface is still functional.
2373 list_for_each_entry(conn_p
, &conn
->sess
->sess_conn_list
, conn_list
) {
2374 if (conn_p
->conn_state
== TARG_CONN_STATE_LOGGED_IN
) {
2375 iscsit_inc_conn_usage_count(conn_p
);
2383 cmd
= iscsit_allocate_cmd(conn_p
, GFP_KERNEL
);
2385 iscsit_dec_conn_usage_count(conn_p
);
2389 cmd
->logout_cid
= conn
->cid
;
2390 cmd
->iscsi_opcode
= ISCSI_OP_ASYNC_EVENT
;
2391 cmd
->i_state
= ISTATE_SEND_ASYNCMSG
;
2393 spin_lock_bh(&conn_p
->cmd_lock
);
2394 list_add_tail(&cmd
->i_list
, &conn_p
->conn_cmd_list
);
2395 spin_unlock_bh(&conn_p
->cmd_lock
);
2397 iscsit_add_cmd_to_response_queue(cmd
, conn_p
, cmd
->i_state
);
2398 iscsit_dec_conn_usage_count(conn_p
);
2401 static int iscsit_send_conn_drop_async_message(
2402 struct iscsi_cmd
*cmd
,
2403 struct iscsi_conn
*conn
)
2405 struct iscsi_async
*hdr
;
2407 cmd
->tx_size
= ISCSI_HDR_LEN
;
2408 cmd
->iscsi_opcode
= ISCSI_OP_ASYNC_EVENT
;
2410 hdr
= (struct iscsi_async
*) cmd
->pdu
;
2411 hdr
->opcode
= ISCSI_OP_ASYNC_EVENT
;
2412 hdr
->flags
= ISCSI_FLAG_CMD_FINAL
;
2413 cmd
->init_task_tag
= 0xFFFFFFFF;
2414 cmd
->targ_xfer_tag
= 0xFFFFFFFF;
2415 put_unaligned_be64(0xFFFFFFFFFFFFFFFFULL
, &hdr
->rsvd4
[0]);
2416 cmd
->stat_sn
= conn
->stat_sn
++;
2417 hdr
->statsn
= cpu_to_be32(cmd
->stat_sn
);
2418 hdr
->exp_cmdsn
= cpu_to_be32(conn
->sess
->exp_cmd_sn
);
2419 hdr
->max_cmdsn
= cpu_to_be32(conn
->sess
->max_cmd_sn
);
2420 hdr
->async_event
= ISCSI_ASYNC_MSG_DROPPING_CONNECTION
;
2421 hdr
->param1
= cpu_to_be16(cmd
->logout_cid
);
2422 hdr
->param2
= cpu_to_be16(conn
->sess
->sess_ops
->DefaultTime2Wait
);
2423 hdr
->param3
= cpu_to_be16(conn
->sess
->sess_ops
->DefaultTime2Retain
);
2425 if (conn
->conn_ops
->HeaderDigest
) {
2426 u32
*header_digest
= (u32
*)&cmd
->pdu
[ISCSI_HDR_LEN
];
2428 iscsit_do_crypto_hash_buf(&conn
->conn_tx_hash
,
2429 (unsigned char *)hdr
, ISCSI_HDR_LEN
,
2430 0, NULL
, (u8
*)header_digest
);
2432 cmd
->tx_size
+= ISCSI_CRC_LEN
;
2433 pr_debug("Attaching CRC32C HeaderDigest to"
2434 " Async Message 0x%08x\n", *header_digest
);
2437 cmd
->iov_misc
[0].iov_base
= cmd
->pdu
;
2438 cmd
->iov_misc
[0].iov_len
= cmd
->tx_size
;
2439 cmd
->iov_misc_count
= 1;
2441 pr_debug("Sending Connection Dropped Async Message StatSN:"
2442 " 0x%08x, for CID: %hu on CID: %hu\n", cmd
->stat_sn
,
2443 cmd
->logout_cid
, conn
->cid
);
2447 static int iscsit_send_data_in(
2448 struct iscsi_cmd
*cmd
,
2449 struct iscsi_conn
*conn
,
2452 int iov_ret
= 0, set_statsn
= 0;
2453 u32 iov_count
= 0, tx_size
= 0;
2454 struct iscsi_datain datain
;
2455 struct iscsi_datain_req
*dr
;
2456 struct iscsi_data_rsp
*hdr
;
2459 memset(&datain
, 0, sizeof(struct iscsi_datain
));
2460 dr
= iscsit_get_datain_values(cmd
, &datain
);
2462 pr_err("iscsit_get_datain_values failed for ITT: 0x%08x\n",
2463 cmd
->init_task_tag
);
2468 * Be paranoid and double check the logic for now.
2470 if ((datain
.offset
+ datain
.length
) > cmd
->data_length
) {
2471 pr_err("Command ITT: 0x%08x, datain.offset: %u and"
2472 " datain.length: %u exceeds cmd->data_length: %u\n",
2473 cmd
->init_task_tag
, datain
.offset
, datain
.length
,
2478 spin_lock_bh(&conn
->sess
->session_stats_lock
);
2479 conn
->sess
->tx_data_octets
+= datain
.length
;
2480 if (conn
->sess
->se_sess
->se_node_acl
) {
2481 spin_lock(&conn
->sess
->se_sess
->se_node_acl
->stats_lock
);
2482 conn
->sess
->se_sess
->se_node_acl
->read_bytes
+= datain
.length
;
2483 spin_unlock(&conn
->sess
->se_sess
->se_node_acl
->stats_lock
);
2485 spin_unlock_bh(&conn
->sess
->session_stats_lock
);
2487 * Special case for successfully execution w/ both DATAIN
2490 if ((datain
.flags
& ISCSI_FLAG_DATA_STATUS
) &&
2491 (cmd
->se_cmd
.se_cmd_flags
& SCF_TRANSPORT_TASK_SENSE
))
2492 datain
.flags
&= ~ISCSI_FLAG_DATA_STATUS
;
2494 if ((dr
->dr_complete
== DATAIN_COMPLETE_NORMAL
) ||
2495 (dr
->dr_complete
== DATAIN_COMPLETE_CONNECTION_RECOVERY
)) {
2496 iscsit_increment_maxcmdsn(cmd
, conn
->sess
);
2497 cmd
->stat_sn
= conn
->stat_sn
++;
2499 } else if (dr
->dr_complete
==
2500 DATAIN_COMPLETE_WITHIN_COMMAND_RECOVERY
)
2504 hdr
= (struct iscsi_data_rsp
*) cmd
->pdu
;
2505 memset(hdr
, 0, ISCSI_HDR_LEN
);
2506 hdr
->opcode
= ISCSI_OP_SCSI_DATA_IN
;
2507 hdr
->flags
= datain
.flags
;
2508 if (hdr
->flags
& ISCSI_FLAG_DATA_STATUS
) {
2509 if (cmd
->se_cmd
.se_cmd_flags
& SCF_OVERFLOW_BIT
) {
2510 hdr
->flags
|= ISCSI_FLAG_DATA_OVERFLOW
;
2511 hdr
->residual_count
= cpu_to_be32(cmd
->residual_count
);
2512 } else if (cmd
->se_cmd
.se_cmd_flags
& SCF_UNDERFLOW_BIT
) {
2513 hdr
->flags
|= ISCSI_FLAG_DATA_UNDERFLOW
;
2514 hdr
->residual_count
= cpu_to_be32(cmd
->residual_count
);
2517 hton24(hdr
->dlength
, datain
.length
);
2518 if (hdr
->flags
& ISCSI_FLAG_DATA_ACK
)
2519 int_to_scsilun(cmd
->se_cmd
.orig_fe_lun
,
2520 (struct scsi_lun
*)&hdr
->lun
);
2522 put_unaligned_le64(0xFFFFFFFFFFFFFFFFULL
, &hdr
->lun
);
2524 hdr
->itt
= cpu_to_be32(cmd
->init_task_tag
);
2525 hdr
->ttt
= (hdr
->flags
& ISCSI_FLAG_DATA_ACK
) ?
2526 cpu_to_be32(cmd
->targ_xfer_tag
) :
2528 hdr
->statsn
= (set_statsn
) ? cpu_to_be32(cmd
->stat_sn
) :
2530 hdr
->exp_cmdsn
= cpu_to_be32(conn
->sess
->exp_cmd_sn
);
2531 hdr
->max_cmdsn
= cpu_to_be32(conn
->sess
->max_cmd_sn
);
2532 hdr
->datasn
= cpu_to_be32(datain
.data_sn
);
2533 hdr
->offset
= cpu_to_be32(datain
.offset
);
2535 iov
= &cmd
->iov_data
[0];
2536 iov
[iov_count
].iov_base
= cmd
->pdu
;
2537 iov
[iov_count
++].iov_len
= ISCSI_HDR_LEN
;
2538 tx_size
+= ISCSI_HDR_LEN
;
2540 if (conn
->conn_ops
->HeaderDigest
) {
2541 u32
*header_digest
= (u32
*)&cmd
->pdu
[ISCSI_HDR_LEN
];
2543 iscsit_do_crypto_hash_buf(&conn
->conn_tx_hash
,
2544 (unsigned char *)hdr
, ISCSI_HDR_LEN
,
2545 0, NULL
, (u8
*)header_digest
);
2547 iov
[0].iov_len
+= ISCSI_CRC_LEN
;
2548 tx_size
+= ISCSI_CRC_LEN
;
2550 pr_debug("Attaching CRC32 HeaderDigest"
2551 " for DataIN PDU 0x%08x\n", *header_digest
);
2554 iov_ret
= iscsit_map_iovec(cmd
, &cmd
->iov_data
[1], datain
.offset
, datain
.length
);
2558 iov_count
+= iov_ret
;
2559 tx_size
+= datain
.length
;
2561 cmd
->padding
= ((-datain
.length
) & 3);
2563 iov
[iov_count
].iov_base
= cmd
->pad_bytes
;
2564 iov
[iov_count
++].iov_len
= cmd
->padding
;
2565 tx_size
+= cmd
->padding
;
2567 pr_debug("Attaching %u padding bytes\n",
2570 if (conn
->conn_ops
->DataDigest
) {
2571 cmd
->data_crc
= iscsit_do_crypto_hash_sg(&conn
->conn_tx_hash
, cmd
,
2572 datain
.offset
, datain
.length
, cmd
->padding
, cmd
->pad_bytes
);
2574 iov
[iov_count
].iov_base
= &cmd
->data_crc
;
2575 iov
[iov_count
++].iov_len
= ISCSI_CRC_LEN
;
2576 tx_size
+= ISCSI_CRC_LEN
;
2578 pr_debug("Attached CRC32C DataDigest %d bytes, crc"
2579 " 0x%08x\n", datain
.length
+cmd
->padding
, cmd
->data_crc
);
2582 cmd
->iov_data_count
= iov_count
;
2583 cmd
->tx_size
= tx_size
;
2585 pr_debug("Built DataIN ITT: 0x%08x, StatSN: 0x%08x,"
2586 " DataSN: 0x%08x, Offset: %u, Length: %u, CID: %hu\n",
2587 cmd
->init_task_tag
, ntohl(hdr
->statsn
), ntohl(hdr
->datasn
),
2588 ntohl(hdr
->offset
), datain
.length
, conn
->cid
);
2590 if (dr
->dr_complete
) {
2591 *eodr
= (cmd
->se_cmd
.se_cmd_flags
& SCF_TRANSPORT_TASK_SENSE
) ?
2593 iscsit_free_datain_req(cmd
, dr
);
2599 static int iscsit_send_logout_response(
2600 struct iscsi_cmd
*cmd
,
2601 struct iscsi_conn
*conn
)
2603 int niov
= 0, tx_size
;
2604 struct iscsi_conn
*logout_conn
= NULL
;
2605 struct iscsi_conn_recovery
*cr
= NULL
;
2606 struct iscsi_session
*sess
= conn
->sess
;
2608 struct iscsi_logout_rsp
*hdr
;
2610 * The actual shutting down of Sessions and/or Connections
2611 * for CLOSESESSION and CLOSECONNECTION Logout Requests
2612 * is done in scsi_logout_post_handler().
2614 switch (cmd
->logout_reason
) {
2615 case ISCSI_LOGOUT_REASON_CLOSE_SESSION
:
2616 pr_debug("iSCSI session logout successful, setting"
2617 " logout response to ISCSI_LOGOUT_SUCCESS.\n");
2618 cmd
->logout_response
= ISCSI_LOGOUT_SUCCESS
;
2620 case ISCSI_LOGOUT_REASON_CLOSE_CONNECTION
:
2621 if (cmd
->logout_response
== ISCSI_LOGOUT_CID_NOT_FOUND
)
2624 * For CLOSECONNECTION logout requests carrying
2625 * a matching logout CID -> local CID, the reference
2626 * for the local CID will have been incremented in
2627 * iscsi_logout_closeconnection().
2629 * For CLOSECONNECTION logout requests carrying
2630 * a different CID than the connection it arrived
2631 * on, the connection responding to cmd->logout_cid
2632 * is stopped in iscsit_logout_post_handler_diffcid().
2635 pr_debug("iSCSI CID: %hu logout on CID: %hu"
2636 " successful.\n", cmd
->logout_cid
, conn
->cid
);
2637 cmd
->logout_response
= ISCSI_LOGOUT_SUCCESS
;
2639 case ISCSI_LOGOUT_REASON_RECOVERY
:
2640 if ((cmd
->logout_response
== ISCSI_LOGOUT_RECOVERY_UNSUPPORTED
) ||
2641 (cmd
->logout_response
== ISCSI_LOGOUT_CLEANUP_FAILED
))
2644 * If the connection is still active from our point of view
2645 * force connection recovery to occur.
2647 logout_conn
= iscsit_get_conn_from_cid_rcfr(sess
,
2649 if ((logout_conn
)) {
2650 iscsit_connection_reinstatement_rcfr(logout_conn
);
2651 iscsit_dec_conn_usage_count(logout_conn
);
2654 cr
= iscsit_get_inactive_connection_recovery_entry(
2655 conn
->sess
, cmd
->logout_cid
);
2657 pr_err("Unable to locate CID: %hu for"
2658 " REMOVECONNFORRECOVERY Logout Request.\n",
2660 cmd
->logout_response
= ISCSI_LOGOUT_CID_NOT_FOUND
;
2664 iscsit_discard_cr_cmds_by_expstatsn(cr
, cmd
->exp_stat_sn
);
2666 pr_debug("iSCSI REMOVECONNFORRECOVERY logout"
2667 " for recovery for CID: %hu on CID: %hu successful.\n",
2668 cmd
->logout_cid
, conn
->cid
);
2669 cmd
->logout_response
= ISCSI_LOGOUT_SUCCESS
;
2672 pr_err("Unknown cmd->logout_reason: 0x%02x\n",
2673 cmd
->logout_reason
);
2677 tx_size
= ISCSI_HDR_LEN
;
2678 hdr
= (struct iscsi_logout_rsp
*)cmd
->pdu
;
2679 memset(hdr
, 0, ISCSI_HDR_LEN
);
2680 hdr
->opcode
= ISCSI_OP_LOGOUT_RSP
;
2681 hdr
->flags
|= ISCSI_FLAG_CMD_FINAL
;
2682 hdr
->response
= cmd
->logout_response
;
2683 hdr
->itt
= cpu_to_be32(cmd
->init_task_tag
);
2684 cmd
->stat_sn
= conn
->stat_sn
++;
2685 hdr
->statsn
= cpu_to_be32(cmd
->stat_sn
);
2687 iscsit_increment_maxcmdsn(cmd
, conn
->sess
);
2688 hdr
->exp_cmdsn
= cpu_to_be32(conn
->sess
->exp_cmd_sn
);
2689 hdr
->max_cmdsn
= cpu_to_be32(conn
->sess
->max_cmd_sn
);
2691 iov
= &cmd
->iov_misc
[0];
2692 iov
[niov
].iov_base
= cmd
->pdu
;
2693 iov
[niov
++].iov_len
= ISCSI_HDR_LEN
;
2695 if (conn
->conn_ops
->HeaderDigest
) {
2696 u32
*header_digest
= (u32
*)&cmd
->pdu
[ISCSI_HDR_LEN
];
2698 iscsit_do_crypto_hash_buf(&conn
->conn_tx_hash
,
2699 (unsigned char *)hdr
, ISCSI_HDR_LEN
,
2700 0, NULL
, (u8
*)header_digest
);
2702 iov
[0].iov_len
+= ISCSI_CRC_LEN
;
2703 tx_size
+= ISCSI_CRC_LEN
;
2704 pr_debug("Attaching CRC32C HeaderDigest to"
2705 " Logout Response 0x%08x\n", *header_digest
);
2707 cmd
->iov_misc_count
= niov
;
2708 cmd
->tx_size
= tx_size
;
2710 pr_debug("Sending Logout Response ITT: 0x%08x StatSN:"
2711 " 0x%08x Response: 0x%02x CID: %hu on CID: %hu\n",
2712 cmd
->init_task_tag
, cmd
->stat_sn
, hdr
->response
,
2713 cmd
->logout_cid
, conn
->cid
);
2719 * Unsolicited NOPIN, either requesting a response or not.
2721 static int iscsit_send_unsolicited_nopin(
2722 struct iscsi_cmd
*cmd
,
2723 struct iscsi_conn
*conn
,
2726 int tx_size
= ISCSI_HDR_LEN
;
2727 struct iscsi_nopin
*hdr
;
2729 hdr
= (struct iscsi_nopin
*) cmd
->pdu
;
2730 memset(hdr
, 0, ISCSI_HDR_LEN
);
2731 hdr
->opcode
= ISCSI_OP_NOOP_IN
;
2732 hdr
->flags
|= ISCSI_FLAG_CMD_FINAL
;
2733 hdr
->itt
= cpu_to_be32(cmd
->init_task_tag
);
2734 hdr
->ttt
= cpu_to_be32(cmd
->targ_xfer_tag
);
2735 cmd
->stat_sn
= conn
->stat_sn
;
2736 hdr
->statsn
= cpu_to_be32(cmd
->stat_sn
);
2737 hdr
->exp_cmdsn
= cpu_to_be32(conn
->sess
->exp_cmd_sn
);
2738 hdr
->max_cmdsn
= cpu_to_be32(conn
->sess
->max_cmd_sn
);
2740 if (conn
->conn_ops
->HeaderDigest
) {
2741 u32
*header_digest
= (u32
*)&cmd
->pdu
[ISCSI_HDR_LEN
];
2743 iscsit_do_crypto_hash_buf(&conn
->conn_tx_hash
,
2744 (unsigned char *)hdr
, ISCSI_HDR_LEN
,
2745 0, NULL
, (u8
*)header_digest
);
2747 tx_size
+= ISCSI_CRC_LEN
;
2748 pr_debug("Attaching CRC32C HeaderDigest to"
2749 " NopIN 0x%08x\n", *header_digest
);
2752 cmd
->iov_misc
[0].iov_base
= cmd
->pdu
;
2753 cmd
->iov_misc
[0].iov_len
= tx_size
;
2754 cmd
->iov_misc_count
= 1;
2755 cmd
->tx_size
= tx_size
;
2757 pr_debug("Sending Unsolicited NOPIN TTT: 0x%08x StatSN:"
2758 " 0x%08x CID: %hu\n", hdr
->ttt
, cmd
->stat_sn
, conn
->cid
);
2763 static int iscsit_send_nopin_response(
2764 struct iscsi_cmd
*cmd
,
2765 struct iscsi_conn
*conn
)
2767 int niov
= 0, tx_size
;
2770 struct iscsi_nopin
*hdr
;
2772 tx_size
= ISCSI_HDR_LEN
;
2773 hdr
= (struct iscsi_nopin
*) cmd
->pdu
;
2774 memset(hdr
, 0, ISCSI_HDR_LEN
);
2775 hdr
->opcode
= ISCSI_OP_NOOP_IN
;
2776 hdr
->flags
|= ISCSI_FLAG_CMD_FINAL
;
2777 hton24(hdr
->dlength
, cmd
->buf_ptr_size
);
2778 put_unaligned_le64(0xFFFFFFFFFFFFFFFFULL
, &hdr
->lun
);
2779 hdr
->itt
= cpu_to_be32(cmd
->init_task_tag
);
2780 hdr
->ttt
= cpu_to_be32(cmd
->targ_xfer_tag
);
2781 cmd
->stat_sn
= conn
->stat_sn
++;
2782 hdr
->statsn
= cpu_to_be32(cmd
->stat_sn
);
2784 iscsit_increment_maxcmdsn(cmd
, conn
->sess
);
2785 hdr
->exp_cmdsn
= cpu_to_be32(conn
->sess
->exp_cmd_sn
);
2786 hdr
->max_cmdsn
= cpu_to_be32(conn
->sess
->max_cmd_sn
);
2788 iov
= &cmd
->iov_misc
[0];
2789 iov
[niov
].iov_base
= cmd
->pdu
;
2790 iov
[niov
++].iov_len
= ISCSI_HDR_LEN
;
2792 if (conn
->conn_ops
->HeaderDigest
) {
2793 u32
*header_digest
= (u32
*)&cmd
->pdu
[ISCSI_HDR_LEN
];
2795 iscsit_do_crypto_hash_buf(&conn
->conn_tx_hash
,
2796 (unsigned char *)hdr
, ISCSI_HDR_LEN
,
2797 0, NULL
, (u8
*)header_digest
);
2799 iov
[0].iov_len
+= ISCSI_CRC_LEN
;
2800 tx_size
+= ISCSI_CRC_LEN
;
2801 pr_debug("Attaching CRC32C HeaderDigest"
2802 " to NopIn 0x%08x\n", *header_digest
);
2806 * NOPOUT Ping Data is attached to struct iscsi_cmd->buf_ptr.
2807 * NOPOUT DataSegmentLength is at struct iscsi_cmd->buf_ptr_size.
2809 if (cmd
->buf_ptr_size
) {
2810 iov
[niov
].iov_base
= cmd
->buf_ptr
;
2811 iov
[niov
++].iov_len
= cmd
->buf_ptr_size
;
2812 tx_size
+= cmd
->buf_ptr_size
;
2814 pr_debug("Echoing back %u bytes of ping"
2815 " data.\n", cmd
->buf_ptr_size
);
2817 padding
= ((-cmd
->buf_ptr_size
) & 3);
2819 iov
[niov
].iov_base
= &cmd
->pad_bytes
;
2820 iov
[niov
++].iov_len
= padding
;
2822 pr_debug("Attaching %u additional"
2823 " padding bytes.\n", padding
);
2825 if (conn
->conn_ops
->DataDigest
) {
2826 iscsit_do_crypto_hash_buf(&conn
->conn_tx_hash
,
2827 cmd
->buf_ptr
, cmd
->buf_ptr_size
,
2828 padding
, (u8
*)&cmd
->pad_bytes
,
2829 (u8
*)&cmd
->data_crc
);
2831 iov
[niov
].iov_base
= &cmd
->data_crc
;
2832 iov
[niov
++].iov_len
= ISCSI_CRC_LEN
;
2833 tx_size
+= ISCSI_CRC_LEN
;
2834 pr_debug("Attached DataDigest for %u"
2835 " bytes of ping data, CRC 0x%08x\n",
2836 cmd
->buf_ptr_size
, cmd
->data_crc
);
2840 cmd
->iov_misc_count
= niov
;
2841 cmd
->tx_size
= tx_size
;
2843 pr_debug("Sending NOPIN Response ITT: 0x%08x, TTT:"
2844 " 0x%08x, StatSN: 0x%08x, Length %u\n", cmd
->init_task_tag
,
2845 cmd
->targ_xfer_tag
, cmd
->stat_sn
, cmd
->buf_ptr_size
);
2850 int iscsit_send_r2t(
2851 struct iscsi_cmd
*cmd
,
2852 struct iscsi_conn
*conn
)
2855 struct iscsi_r2t
*r2t
;
2856 struct iscsi_r2t_rsp
*hdr
;
2858 r2t
= iscsit_get_r2t_from_list(cmd
);
2862 hdr
= (struct iscsi_r2t_rsp
*) cmd
->pdu
;
2863 memset(hdr
, 0, ISCSI_HDR_LEN
);
2864 hdr
->opcode
= ISCSI_OP_R2T
;
2865 hdr
->flags
|= ISCSI_FLAG_CMD_FINAL
;
2866 int_to_scsilun(cmd
->se_cmd
.orig_fe_lun
,
2867 (struct scsi_lun
*)&hdr
->lun
);
2868 hdr
->itt
= cpu_to_be32(cmd
->init_task_tag
);
2869 spin_lock_bh(&conn
->sess
->ttt_lock
);
2870 r2t
->targ_xfer_tag
= conn
->sess
->targ_xfer_tag
++;
2871 if (r2t
->targ_xfer_tag
== 0xFFFFFFFF)
2872 r2t
->targ_xfer_tag
= conn
->sess
->targ_xfer_tag
++;
2873 spin_unlock_bh(&conn
->sess
->ttt_lock
);
2874 hdr
->ttt
= cpu_to_be32(r2t
->targ_xfer_tag
);
2875 hdr
->statsn
= cpu_to_be32(conn
->stat_sn
);
2876 hdr
->exp_cmdsn
= cpu_to_be32(conn
->sess
->exp_cmd_sn
);
2877 hdr
->max_cmdsn
= cpu_to_be32(conn
->sess
->max_cmd_sn
);
2878 hdr
->r2tsn
= cpu_to_be32(r2t
->r2t_sn
);
2879 hdr
->data_offset
= cpu_to_be32(r2t
->offset
);
2880 hdr
->data_length
= cpu_to_be32(r2t
->xfer_len
);
2882 cmd
->iov_misc
[0].iov_base
= cmd
->pdu
;
2883 cmd
->iov_misc
[0].iov_len
= ISCSI_HDR_LEN
;
2884 tx_size
+= ISCSI_HDR_LEN
;
2886 if (conn
->conn_ops
->HeaderDigest
) {
2887 u32
*header_digest
= (u32
*)&cmd
->pdu
[ISCSI_HDR_LEN
];
2889 iscsit_do_crypto_hash_buf(&conn
->conn_tx_hash
,
2890 (unsigned char *)hdr
, ISCSI_HDR_LEN
,
2891 0, NULL
, (u8
*)header_digest
);
2893 cmd
->iov_misc
[0].iov_len
+= ISCSI_CRC_LEN
;
2894 tx_size
+= ISCSI_CRC_LEN
;
2895 pr_debug("Attaching CRC32 HeaderDigest for R2T"
2896 " PDU 0x%08x\n", *header_digest
);
2899 pr_debug("Built %sR2T, ITT: 0x%08x, TTT: 0x%08x, StatSN:"
2900 " 0x%08x, R2TSN: 0x%08x, Offset: %u, DDTL: %u, CID: %hu\n",
2901 (!r2t
->recovery_r2t
) ? "" : "Recovery ", cmd
->init_task_tag
,
2902 r2t
->targ_xfer_tag
, ntohl(hdr
->statsn
), r2t
->r2t_sn
,
2903 r2t
->offset
, r2t
->xfer_len
, conn
->cid
);
2905 cmd
->iov_misc_count
= 1;
2906 cmd
->tx_size
= tx_size
;
2908 spin_lock_bh(&cmd
->r2t_lock
);
2910 spin_unlock_bh(&cmd
->r2t_lock
);
2916 * type 0: Normal Operation.
2917 * type 1: Called from Storage Transport.
2918 * type 2: Called from iscsi_task_reassign_complete_write() for
2919 * connection recovery.
2921 int iscsit_build_r2ts_for_cmd(
2922 struct iscsi_cmd
*cmd
,
2923 struct iscsi_conn
*conn
,
2927 u32 offset
= 0, xfer_len
= 0;
2929 spin_lock_bh(&cmd
->r2t_lock
);
2930 if (cmd
->cmd_flags
& ICF_SENT_LAST_R2T
) {
2931 spin_unlock_bh(&cmd
->r2t_lock
);
2935 if (conn
->sess
->sess_ops
->DataSequenceInOrder
&& (type
!= 2))
2936 if (cmd
->r2t_offset
< cmd
->write_data_done
)
2937 cmd
->r2t_offset
= cmd
->write_data_done
;
2939 while (cmd
->outstanding_r2ts
< conn
->sess
->sess_ops
->MaxOutstandingR2T
) {
2940 if (conn
->sess
->sess_ops
->DataSequenceInOrder
) {
2941 offset
= cmd
->r2t_offset
;
2943 if (first_r2t
&& (type
== 2)) {
2944 xfer_len
= ((offset
+
2945 (conn
->sess
->sess_ops
->MaxBurstLength
-
2946 cmd
->next_burst_len
) >
2948 (cmd
->data_length
- offset
) :
2949 (conn
->sess
->sess_ops
->MaxBurstLength
-
2950 cmd
->next_burst_len
));
2952 xfer_len
= ((offset
+
2953 conn
->sess
->sess_ops
->MaxBurstLength
) >
2955 (cmd
->data_length
- offset
) :
2956 conn
->sess
->sess_ops
->MaxBurstLength
;
2958 cmd
->r2t_offset
+= xfer_len
;
2960 if (cmd
->r2t_offset
== cmd
->data_length
)
2961 cmd
->cmd_flags
|= ICF_SENT_LAST_R2T
;
2963 struct iscsi_seq
*seq
;
2965 seq
= iscsit_get_seq_holder_for_r2t(cmd
);
2967 spin_unlock_bh(&cmd
->r2t_lock
);
2971 offset
= seq
->offset
;
2972 xfer_len
= seq
->xfer_len
;
2974 if (cmd
->seq_send_order
== cmd
->seq_count
)
2975 cmd
->cmd_flags
|= ICF_SENT_LAST_R2T
;
2977 cmd
->outstanding_r2ts
++;
2980 if (iscsit_add_r2t_to_list(cmd
, offset
, xfer_len
, 0, 0) < 0) {
2981 spin_unlock_bh(&cmd
->r2t_lock
);
2985 if (cmd
->cmd_flags
& ICF_SENT_LAST_R2T
)
2988 spin_unlock_bh(&cmd
->r2t_lock
);
2993 static int iscsit_send_status(
2994 struct iscsi_cmd
*cmd
,
2995 struct iscsi_conn
*conn
)
2997 u8 iov_count
= 0, recovery
;
2998 u32 padding
= 0, tx_size
= 0;
2999 struct iscsi_scsi_rsp
*hdr
;
3002 recovery
= (cmd
->i_state
!= ISTATE_SEND_STATUS
);
3004 cmd
->stat_sn
= conn
->stat_sn
++;
3006 spin_lock_bh(&conn
->sess
->session_stats_lock
);
3007 conn
->sess
->rsp_pdus
++;
3008 spin_unlock_bh(&conn
->sess
->session_stats_lock
);
3010 hdr
= (struct iscsi_scsi_rsp
*) cmd
->pdu
;
3011 memset(hdr
, 0, ISCSI_HDR_LEN
);
3012 hdr
->opcode
= ISCSI_OP_SCSI_CMD_RSP
;
3013 hdr
->flags
|= ISCSI_FLAG_CMD_FINAL
;
3014 if (cmd
->se_cmd
.se_cmd_flags
& SCF_OVERFLOW_BIT
) {
3015 hdr
->flags
|= ISCSI_FLAG_CMD_OVERFLOW
;
3016 hdr
->residual_count
= cpu_to_be32(cmd
->residual_count
);
3017 } else if (cmd
->se_cmd
.se_cmd_flags
& SCF_UNDERFLOW_BIT
) {
3018 hdr
->flags
|= ISCSI_FLAG_CMD_UNDERFLOW
;
3019 hdr
->residual_count
= cpu_to_be32(cmd
->residual_count
);
3021 hdr
->response
= cmd
->iscsi_response
;
3022 hdr
->cmd_status
= cmd
->se_cmd
.scsi_status
;
3023 hdr
->itt
= cpu_to_be32(cmd
->init_task_tag
);
3024 hdr
->statsn
= cpu_to_be32(cmd
->stat_sn
);
3026 iscsit_increment_maxcmdsn(cmd
, conn
->sess
);
3027 hdr
->exp_cmdsn
= cpu_to_be32(conn
->sess
->exp_cmd_sn
);
3028 hdr
->max_cmdsn
= cpu_to_be32(conn
->sess
->max_cmd_sn
);
3030 iov
= &cmd
->iov_misc
[0];
3031 iov
[iov_count
].iov_base
= cmd
->pdu
;
3032 iov
[iov_count
++].iov_len
= ISCSI_HDR_LEN
;
3033 tx_size
+= ISCSI_HDR_LEN
;
3036 * Attach SENSE DATA payload to iSCSI Response PDU
3038 if (cmd
->se_cmd
.sense_buffer
&&
3039 ((cmd
->se_cmd
.se_cmd_flags
& SCF_TRANSPORT_TASK_SENSE
) ||
3040 (cmd
->se_cmd
.se_cmd_flags
& SCF_EMULATED_TASK_SENSE
))) {
3041 padding
= -(cmd
->se_cmd
.scsi_sense_length
) & 3;
3042 hton24(hdr
->dlength
, cmd
->se_cmd
.scsi_sense_length
);
3043 iov
[iov_count
].iov_base
= cmd
->se_cmd
.sense_buffer
;
3044 iov
[iov_count
++].iov_len
=
3045 (cmd
->se_cmd
.scsi_sense_length
+ padding
);
3046 tx_size
+= cmd
->se_cmd
.scsi_sense_length
;
3049 memset(cmd
->se_cmd
.sense_buffer
+
3050 cmd
->se_cmd
.scsi_sense_length
, 0, padding
);
3052 pr_debug("Adding %u bytes of padding to"
3053 " SENSE.\n", padding
);
3056 if (conn
->conn_ops
->DataDigest
) {
3057 iscsit_do_crypto_hash_buf(&conn
->conn_tx_hash
,
3058 cmd
->se_cmd
.sense_buffer
,
3059 (cmd
->se_cmd
.scsi_sense_length
+ padding
),
3060 0, NULL
, (u8
*)&cmd
->data_crc
);
3062 iov
[iov_count
].iov_base
= &cmd
->data_crc
;
3063 iov
[iov_count
++].iov_len
= ISCSI_CRC_LEN
;
3064 tx_size
+= ISCSI_CRC_LEN
;
3066 pr_debug("Attaching CRC32 DataDigest for"
3067 " SENSE, %u bytes CRC 0x%08x\n",
3068 (cmd
->se_cmd
.scsi_sense_length
+ padding
),
3072 pr_debug("Attaching SENSE DATA: %u bytes to iSCSI"
3074 cmd
->se_cmd
.scsi_sense_length
);
3077 if (conn
->conn_ops
->HeaderDigest
) {
3078 u32
*header_digest
= (u32
*)&cmd
->pdu
[ISCSI_HDR_LEN
];
3080 iscsit_do_crypto_hash_buf(&conn
->conn_tx_hash
,
3081 (unsigned char *)hdr
, ISCSI_HDR_LEN
,
3082 0, NULL
, (u8
*)header_digest
);
3084 iov
[0].iov_len
+= ISCSI_CRC_LEN
;
3085 tx_size
+= ISCSI_CRC_LEN
;
3086 pr_debug("Attaching CRC32 HeaderDigest for Response"
3087 " PDU 0x%08x\n", *header_digest
);
3090 cmd
->iov_misc_count
= iov_count
;
3091 cmd
->tx_size
= tx_size
;
3093 pr_debug("Built %sSCSI Response, ITT: 0x%08x, StatSN: 0x%08x,"
3094 " Response: 0x%02x, SAM Status: 0x%02x, CID: %hu\n",
3095 (!recovery
) ? "" : "Recovery ", cmd
->init_task_tag
,
3096 cmd
->stat_sn
, 0x00, cmd
->se_cmd
.scsi_status
, conn
->cid
);
3101 static u8
iscsit_convert_tcm_tmr_rsp(struct se_tmr_req
*se_tmr
)
3103 switch (se_tmr
->response
) {
3104 case TMR_FUNCTION_COMPLETE
:
3105 return ISCSI_TMF_RSP_COMPLETE
;
3106 case TMR_TASK_DOES_NOT_EXIST
:
3107 return ISCSI_TMF_RSP_NO_TASK
;
3108 case TMR_LUN_DOES_NOT_EXIST
:
3109 return ISCSI_TMF_RSP_NO_LUN
;
3110 case TMR_TASK_MGMT_FUNCTION_NOT_SUPPORTED
:
3111 return ISCSI_TMF_RSP_NOT_SUPPORTED
;
3112 case TMR_FUNCTION_AUTHORIZATION_FAILED
:
3113 return ISCSI_TMF_RSP_AUTH_FAILED
;
3114 case TMR_FUNCTION_REJECTED
:
3116 return ISCSI_TMF_RSP_REJECTED
;
3120 static int iscsit_send_task_mgt_rsp(
3121 struct iscsi_cmd
*cmd
,
3122 struct iscsi_conn
*conn
)
3124 struct se_tmr_req
*se_tmr
= cmd
->se_cmd
.se_tmr_req
;
3125 struct iscsi_tm_rsp
*hdr
;
3128 hdr
= (struct iscsi_tm_rsp
*) cmd
->pdu
;
3129 memset(hdr
, 0, ISCSI_HDR_LEN
);
3130 hdr
->opcode
= ISCSI_OP_SCSI_TMFUNC_RSP
;
3131 hdr
->response
= iscsit_convert_tcm_tmr_rsp(se_tmr
);
3132 hdr
->itt
= cpu_to_be32(cmd
->init_task_tag
);
3133 cmd
->stat_sn
= conn
->stat_sn
++;
3134 hdr
->statsn
= cpu_to_be32(cmd
->stat_sn
);
3136 iscsit_increment_maxcmdsn(cmd
, conn
->sess
);
3137 hdr
->exp_cmdsn
= cpu_to_be32(conn
->sess
->exp_cmd_sn
);
3138 hdr
->max_cmdsn
= cpu_to_be32(conn
->sess
->max_cmd_sn
);
3140 cmd
->iov_misc
[0].iov_base
= cmd
->pdu
;
3141 cmd
->iov_misc
[0].iov_len
= ISCSI_HDR_LEN
;
3142 tx_size
+= ISCSI_HDR_LEN
;
3144 if (conn
->conn_ops
->HeaderDigest
) {
3145 u32
*header_digest
= (u32
*)&cmd
->pdu
[ISCSI_HDR_LEN
];
3147 iscsit_do_crypto_hash_buf(&conn
->conn_tx_hash
,
3148 (unsigned char *)hdr
, ISCSI_HDR_LEN
,
3149 0, NULL
, (u8
*)header_digest
);
3151 cmd
->iov_misc
[0].iov_len
+= ISCSI_CRC_LEN
;
3152 tx_size
+= ISCSI_CRC_LEN
;
3153 pr_debug("Attaching CRC32 HeaderDigest for Task"
3154 " Mgmt Response PDU 0x%08x\n", *header_digest
);
3157 cmd
->iov_misc_count
= 1;
3158 cmd
->tx_size
= tx_size
;
3160 pr_debug("Built Task Management Response ITT: 0x%08x,"
3161 " StatSN: 0x%08x, Response: 0x%02x, CID: %hu\n",
3162 cmd
->init_task_tag
, cmd
->stat_sn
, hdr
->response
, conn
->cid
);
3167 static int iscsit_build_sendtargets_response(struct iscsi_cmd
*cmd
)
3169 char *payload
= NULL
;
3170 struct iscsi_conn
*conn
= cmd
->conn
;
3171 struct iscsi_portal_group
*tpg
;
3172 struct iscsi_tiqn
*tiqn
;
3173 struct iscsi_tpg_np
*tpg_np
;
3174 int buffer_len
, end_of_buf
= 0, len
= 0, payload_len
= 0;
3175 unsigned char buf
[256];
3177 buffer_len
= (conn
->conn_ops
->MaxRecvDataSegmentLength
> 32768) ?
3178 32768 : conn
->conn_ops
->MaxRecvDataSegmentLength
;
3180 memset(buf
, 0, 256);
3182 payload
= kzalloc(buffer_len
, GFP_KERNEL
);
3184 pr_err("Unable to allocate memory for sendtargets"
3189 spin_lock(&tiqn_lock
);
3190 list_for_each_entry(tiqn
, &g_tiqn_list
, tiqn_list
) {
3191 len
= sprintf(buf
, "TargetName=%s", tiqn
->tiqn
);
3194 if ((len
+ payload_len
) > buffer_len
) {
3195 spin_unlock(&tiqn
->tiqn_tpg_lock
);
3199 memcpy((void *)payload
+ payload_len
, buf
, len
);
3202 spin_lock(&tiqn
->tiqn_tpg_lock
);
3203 list_for_each_entry(tpg
, &tiqn
->tiqn_tpg_list
, tpg_list
) {
3205 spin_lock(&tpg
->tpg_state_lock
);
3206 if ((tpg
->tpg_state
== TPG_STATE_FREE
) ||
3207 (tpg
->tpg_state
== TPG_STATE_INACTIVE
)) {
3208 spin_unlock(&tpg
->tpg_state_lock
);
3211 spin_unlock(&tpg
->tpg_state_lock
);
3213 spin_lock(&tpg
->tpg_np_lock
);
3214 list_for_each_entry(tpg_np
, &tpg
->tpg_gnp_list
,
3216 len
= sprintf(buf
, "TargetAddress="
3218 (tpg_np
->tpg_np
->np_sockaddr
.ss_family
== AF_INET6
) ?
3219 "[" : "", tpg_np
->tpg_np
->np_ip
,
3220 (tpg_np
->tpg_np
->np_sockaddr
.ss_family
== AF_INET6
) ?
3221 "]" : "", tpg_np
->tpg_np
->np_port
,
3225 if ((len
+ payload_len
) > buffer_len
) {
3226 spin_unlock(&tpg
->tpg_np_lock
);
3227 spin_unlock(&tiqn
->tiqn_tpg_lock
);
3231 memcpy((void *)payload
+ payload_len
, buf
, len
);
3234 spin_unlock(&tpg
->tpg_np_lock
);
3236 spin_unlock(&tiqn
->tiqn_tpg_lock
);
3241 spin_unlock(&tiqn_lock
);
3243 cmd
->buf_ptr
= payload
;
3249 * FIXME: Add support for F_BIT and C_BIT when the length is longer than
3250 * MaxRecvDataSegmentLength.
3252 static int iscsit_send_text_rsp(
3253 struct iscsi_cmd
*cmd
,
3254 struct iscsi_conn
*conn
)
3256 struct iscsi_text_rsp
*hdr
;
3258 u32 padding
= 0, tx_size
= 0;
3259 int text_length
, iov_count
= 0;
3261 text_length
= iscsit_build_sendtargets_response(cmd
);
3262 if (text_length
< 0)
3265 padding
= ((-text_length
) & 3);
3267 memset(cmd
->buf_ptr
+ text_length
, 0, padding
);
3268 pr_debug("Attaching %u additional bytes for"
3269 " padding.\n", padding
);
3272 hdr
= (struct iscsi_text_rsp
*) cmd
->pdu
;
3273 memset(hdr
, 0, ISCSI_HDR_LEN
);
3274 hdr
->opcode
= ISCSI_OP_TEXT_RSP
;
3275 hdr
->flags
|= ISCSI_FLAG_CMD_FINAL
;
3276 hton24(hdr
->dlength
, text_length
);
3277 hdr
->itt
= cpu_to_be32(cmd
->init_task_tag
);
3278 hdr
->ttt
= cpu_to_be32(cmd
->targ_xfer_tag
);
3279 cmd
->stat_sn
= conn
->stat_sn
++;
3280 hdr
->statsn
= cpu_to_be32(cmd
->stat_sn
);
3282 iscsit_increment_maxcmdsn(cmd
, conn
->sess
);
3283 hdr
->exp_cmdsn
= cpu_to_be32(conn
->sess
->exp_cmd_sn
);
3284 hdr
->max_cmdsn
= cpu_to_be32(conn
->sess
->max_cmd_sn
);
3286 iov
= &cmd
->iov_misc
[0];
3288 iov
[iov_count
].iov_base
= cmd
->pdu
;
3289 iov
[iov_count
++].iov_len
= ISCSI_HDR_LEN
;
3290 iov
[iov_count
].iov_base
= cmd
->buf_ptr
;
3291 iov
[iov_count
++].iov_len
= text_length
+ padding
;
3293 tx_size
+= (ISCSI_HDR_LEN
+ text_length
+ padding
);
3295 if (conn
->conn_ops
->HeaderDigest
) {
3296 u32
*header_digest
= (u32
*)&cmd
->pdu
[ISCSI_HDR_LEN
];
3298 iscsit_do_crypto_hash_buf(&conn
->conn_tx_hash
,
3299 (unsigned char *)hdr
, ISCSI_HDR_LEN
,
3300 0, NULL
, (u8
*)header_digest
);
3302 iov
[0].iov_len
+= ISCSI_CRC_LEN
;
3303 tx_size
+= ISCSI_CRC_LEN
;
3304 pr_debug("Attaching CRC32 HeaderDigest for"
3305 " Text Response PDU 0x%08x\n", *header_digest
);
3308 if (conn
->conn_ops
->DataDigest
) {
3309 iscsit_do_crypto_hash_buf(&conn
->conn_tx_hash
,
3310 cmd
->buf_ptr
, (text_length
+ padding
),
3311 0, NULL
, (u8
*)&cmd
->data_crc
);
3313 iov
[iov_count
].iov_base
= &cmd
->data_crc
;
3314 iov
[iov_count
++].iov_len
= ISCSI_CRC_LEN
;
3315 tx_size
+= ISCSI_CRC_LEN
;
3317 pr_debug("Attaching DataDigest for %u bytes of text"
3318 " data, CRC 0x%08x\n", (text_length
+ padding
),
3322 cmd
->iov_misc_count
= iov_count
;
3323 cmd
->tx_size
= tx_size
;
3325 pr_debug("Built Text Response: ITT: 0x%08x, StatSN: 0x%08x,"
3326 " Length: %u, CID: %hu\n", cmd
->init_task_tag
, cmd
->stat_sn
,
3327 text_length
, conn
->cid
);
3331 static int iscsit_send_reject(
3332 struct iscsi_cmd
*cmd
,
3333 struct iscsi_conn
*conn
)
3335 u32 iov_count
= 0, tx_size
= 0;
3336 struct iscsi_reject
*hdr
;
3339 hdr
= (struct iscsi_reject
*) cmd
->pdu
;
3340 hdr
->opcode
= ISCSI_OP_REJECT
;
3341 hdr
->flags
|= ISCSI_FLAG_CMD_FINAL
;
3342 hton24(hdr
->dlength
, ISCSI_HDR_LEN
);
3343 cmd
->stat_sn
= conn
->stat_sn
++;
3344 hdr
->statsn
= cpu_to_be32(cmd
->stat_sn
);
3345 hdr
->exp_cmdsn
= cpu_to_be32(conn
->sess
->exp_cmd_sn
);
3346 hdr
->max_cmdsn
= cpu_to_be32(conn
->sess
->max_cmd_sn
);
3348 iov
= &cmd
->iov_misc
[0];
3350 iov
[iov_count
].iov_base
= cmd
->pdu
;
3351 iov
[iov_count
++].iov_len
= ISCSI_HDR_LEN
;
3352 iov
[iov_count
].iov_base
= cmd
->buf_ptr
;
3353 iov
[iov_count
++].iov_len
= ISCSI_HDR_LEN
;
3355 tx_size
= (ISCSI_HDR_LEN
+ ISCSI_HDR_LEN
);
3357 if (conn
->conn_ops
->HeaderDigest
) {
3358 u32
*header_digest
= (u32
*)&cmd
->pdu
[ISCSI_HDR_LEN
];
3360 iscsit_do_crypto_hash_buf(&conn
->conn_tx_hash
,
3361 (unsigned char *)hdr
, ISCSI_HDR_LEN
,
3362 0, NULL
, (u8
*)header_digest
);
3364 iov
[0].iov_len
+= ISCSI_CRC_LEN
;
3365 tx_size
+= ISCSI_CRC_LEN
;
3366 pr_debug("Attaching CRC32 HeaderDigest for"
3367 " REJECT PDU 0x%08x\n", *header_digest
);
3370 if (conn
->conn_ops
->DataDigest
) {
3371 iscsit_do_crypto_hash_buf(&conn
->conn_tx_hash
,
3372 (unsigned char *)cmd
->buf_ptr
, ISCSI_HDR_LEN
,
3373 0, NULL
, (u8
*)&cmd
->data_crc
);
3375 iov
[iov_count
].iov_base
= &cmd
->data_crc
;
3376 iov
[iov_count
++].iov_len
= ISCSI_CRC_LEN
;
3377 tx_size
+= ISCSI_CRC_LEN
;
3378 pr_debug("Attaching CRC32 DataDigest for REJECT"
3379 " PDU 0x%08x\n", cmd
->data_crc
);
3382 cmd
->iov_misc_count
= iov_count
;
3383 cmd
->tx_size
= tx_size
;
3385 pr_debug("Built Reject PDU StatSN: 0x%08x, Reason: 0x%02x,"
3386 " CID: %hu\n", ntohl(hdr
->statsn
), hdr
->reason
, conn
->cid
);
3391 static void iscsit_tx_thread_wait_for_tcp(struct iscsi_conn
*conn
)
3393 if ((conn
->sock
->sk
->sk_shutdown
& SEND_SHUTDOWN
) ||
3394 (conn
->sock
->sk
->sk_shutdown
& RCV_SHUTDOWN
)) {
3395 wait_for_completion_interruptible_timeout(
3396 &conn
->tx_half_close_comp
,
3397 ISCSI_TX_THREAD_TCP_TIMEOUT
* HZ
);
3403 void iscsit_thread_get_cpumask(struct iscsi_conn
*conn
)
3405 struct iscsi_thread_set
*ts
= conn
->thread_set
;
3408 * thread_id is assigned from iscsit_global->ts_bitmap from
3409 * within iscsi_thread_set.c:iscsi_allocate_thread_sets()
3411 * Here we use thread_id to determine which CPU that this
3412 * iSCSI connection's iscsi_thread_set will be scheduled to
3415 ord
= ts
->thread_id
% cpumask_weight(cpu_online_mask
);
3417 pr_debug(">>>>>>>>>>>>>>>>>>>> Generated ord: %d from"
3418 " thread_id: %d\n", ord
, ts
->thread_id
);
3420 for_each_online_cpu(cpu
) {
3422 cpumask_set_cpu(cpu
, conn
->conn_cpumask
);
3427 * This should never be reached..
3430 cpumask_setall(conn
->conn_cpumask
);
3433 static inline void iscsit_thread_check_cpumask(
3434 struct iscsi_conn
*conn
,
3435 struct task_struct
*p
,
3440 * mode == 1 signals iscsi_target_tx_thread() usage.
3441 * mode == 0 signals iscsi_target_rx_thread() usage.
3444 if (!conn
->conn_tx_reset_cpumask
)
3446 conn
->conn_tx_reset_cpumask
= 0;
3448 if (!conn
->conn_rx_reset_cpumask
)
3450 conn
->conn_rx_reset_cpumask
= 0;
3453 * Update the CPU mask for this single kthread so that
3454 * both TX and RX kthreads are scheduled to run on the
3457 memset(buf
, 0, 128);
3458 cpumask_scnprintf(buf
, 128, conn
->conn_cpumask
);
3460 pr_debug(">>>>>>>>>>>>>> Calling set_cpus_allowed_ptr():"
3461 " %s for %s\n", buf
, p
->comm
);
3463 set_cpus_allowed_ptr(p
, conn
->conn_cpumask
);
3468 void iscsit_thread_get_cpumask(struct iscsi_conn
*conn
)
3473 #define iscsit_thread_check_cpumask(X, Y, Z) ({})
3474 #endif /* CONFIG_SMP */
3476 int iscsi_target_tx_thread(void *arg
)
3481 int sent_status
= 0;
3484 struct iscsi_cmd
*cmd
= NULL
;
3485 struct iscsi_conn
*conn
;
3486 struct iscsi_queue_req
*qr
= NULL
;
3487 struct se_cmd
*se_cmd
;
3488 struct iscsi_thread_set
*ts
= (struct iscsi_thread_set
*)arg
;
3490 * Allow ourselves to be interrupted by SIGINT so that a
3491 * connection recovery / failure event can be triggered externally.
3493 allow_signal(SIGINT
);
3496 conn
= iscsi_tx_thread_pre_handler(ts
);
3500 eodr
= map_sg
= ret
= sent_status
= use_misc
= 0;
3502 while (!kthread_should_stop()) {
3504 * Ensure that both TX and RX per connection kthreads
3505 * are scheduled to run on the same CPU.
3507 iscsit_thread_check_cpumask(conn
, current
, 1);
3509 schedule_timeout_interruptible(MAX_SCHEDULE_TIMEOUT
);
3511 if ((ts
->status
== ISCSI_THREAD_SET_RESET
) ||
3512 signal_pending(current
))
3516 qr
= iscsit_get_cmd_from_immediate_queue(conn
);
3518 atomic_set(&conn
->check_immediate_queue
, 0);
3521 kmem_cache_free(lio_qr_cache
, qr
);
3523 spin_lock_bh(&cmd
->istate_lock
);
3525 case ISTATE_SEND_R2T
:
3526 spin_unlock_bh(&cmd
->istate_lock
);
3527 ret
= iscsit_send_r2t(cmd
, conn
);
3530 spin_unlock_bh(&cmd
->istate_lock
);
3532 if (cmd
->data_direction
== DMA_TO_DEVICE
)
3533 iscsit_stop_dataout_timer(cmd
);
3535 spin_lock_bh(&conn
->cmd_lock
);
3536 list_del(&cmd
->i_list
);
3537 spin_unlock_bh(&conn
->cmd_lock
);
3539 iscsit_free_cmd(cmd
);
3541 case ISTATE_SEND_NOPIN_WANT_RESPONSE
:
3542 spin_unlock_bh(&cmd
->istate_lock
);
3543 iscsit_mod_nopin_response_timer(conn
);
3544 ret
= iscsit_send_unsolicited_nopin(cmd
,
3547 case ISTATE_SEND_NOPIN_NO_RESPONSE
:
3548 spin_unlock_bh(&cmd
->istate_lock
);
3549 ret
= iscsit_send_unsolicited_nopin(cmd
,
3553 pr_err("Unknown Opcode: 0x%02x ITT:"
3554 " 0x%08x, i_state: %d on CID: %hu\n",
3555 cmd
->iscsi_opcode
, cmd
->init_task_tag
, state
,
3557 spin_unlock_bh(&cmd
->istate_lock
);
3561 conn
->tx_immediate_queue
= 0;
3565 if (iscsit_send_tx_data(cmd
, conn
, 1) < 0) {
3566 conn
->tx_immediate_queue
= 0;
3567 iscsit_tx_thread_wait_for_tcp(conn
);
3571 spin_lock_bh(&cmd
->istate_lock
);
3573 case ISTATE_SEND_R2T
:
3574 spin_unlock_bh(&cmd
->istate_lock
);
3575 spin_lock_bh(&cmd
->dataout_timeout_lock
);
3576 iscsit_start_dataout_timer(cmd
, conn
);
3577 spin_unlock_bh(&cmd
->dataout_timeout_lock
);
3579 case ISTATE_SEND_NOPIN_WANT_RESPONSE
:
3580 cmd
->i_state
= ISTATE_SENT_NOPIN_WANT_RESPONSE
;
3581 spin_unlock_bh(&cmd
->istate_lock
);
3583 case ISTATE_SEND_NOPIN_NO_RESPONSE
:
3584 cmd
->i_state
= ISTATE_SENT_STATUS
;
3585 spin_unlock_bh(&cmd
->istate_lock
);
3588 pr_err("Unknown Opcode: 0x%02x ITT:"
3589 " 0x%08x, i_state: %d on CID: %hu\n",
3590 cmd
->iscsi_opcode
, cmd
->init_task_tag
,
3592 spin_unlock_bh(&cmd
->istate_lock
);
3597 conn
->tx_immediate_queue
= 0;
3600 qr
= iscsit_get_cmd_from_response_queue(conn
);
3604 kmem_cache_free(lio_qr_cache
, qr
);
3606 spin_lock_bh(&cmd
->istate_lock
);
3609 case ISTATE_SEND_DATAIN
:
3610 spin_unlock_bh(&cmd
->istate_lock
);
3611 ret
= iscsit_send_data_in(cmd
, conn
,
3615 case ISTATE_SEND_STATUS
:
3616 case ISTATE_SEND_STATUS_RECOVERY
:
3617 spin_unlock_bh(&cmd
->istate_lock
);
3619 ret
= iscsit_send_status(cmd
, conn
);
3621 case ISTATE_SEND_LOGOUTRSP
:
3622 spin_unlock_bh(&cmd
->istate_lock
);
3624 ret
= iscsit_send_logout_response(cmd
, conn
);
3626 case ISTATE_SEND_ASYNCMSG
:
3627 spin_unlock_bh(&cmd
->istate_lock
);
3629 ret
= iscsit_send_conn_drop_async_message(
3632 case ISTATE_SEND_NOPIN
:
3633 spin_unlock_bh(&cmd
->istate_lock
);
3635 ret
= iscsit_send_nopin_response(cmd
, conn
);
3637 case ISTATE_SEND_REJECT
:
3638 spin_unlock_bh(&cmd
->istate_lock
);
3640 ret
= iscsit_send_reject(cmd
, conn
);
3642 case ISTATE_SEND_TASKMGTRSP
:
3643 spin_unlock_bh(&cmd
->istate_lock
);
3645 ret
= iscsit_send_task_mgt_rsp(cmd
, conn
);
3648 ret
= iscsit_tmr_post_handler(cmd
, conn
);
3650 iscsit_fall_back_to_erl0(conn
->sess
);
3652 case ISTATE_SEND_TEXTRSP
:
3653 spin_unlock_bh(&cmd
->istate_lock
);
3655 ret
= iscsit_send_text_rsp(cmd
, conn
);
3658 pr_err("Unknown Opcode: 0x%02x ITT:"
3659 " 0x%08x, i_state: %d on CID: %hu\n",
3660 cmd
->iscsi_opcode
, cmd
->init_task_tag
,
3662 spin_unlock_bh(&cmd
->istate_lock
);
3666 conn
->tx_response_queue
= 0;
3670 se_cmd
= &cmd
->se_cmd
;
3672 if (map_sg
&& !conn
->conn_ops
->IFMarker
) {
3673 if (iscsit_fe_sendpage_sg(cmd
, conn
) < 0) {
3674 conn
->tx_response_queue
= 0;
3675 iscsit_tx_thread_wait_for_tcp(conn
);
3676 iscsit_unmap_iovec(cmd
);
3680 if (iscsit_send_tx_data(cmd
, conn
, use_misc
) < 0) {
3681 conn
->tx_response_queue
= 0;
3682 iscsit_tx_thread_wait_for_tcp(conn
);
3683 iscsit_unmap_iovec(cmd
);
3688 iscsit_unmap_iovec(cmd
);
3690 spin_lock_bh(&cmd
->istate_lock
);
3692 case ISTATE_SEND_DATAIN
:
3694 goto check_rsp_state
;
3697 cmd
->i_state
= ISTATE_SENT_LAST_DATAIN
;
3699 eodr
= use_misc
= 0;
3700 } else if (eodr
== 2) {
3701 cmd
->i_state
= state
=
3704 eodr
= use_misc
= 0;
3705 goto check_rsp_state
;
3708 case ISTATE_SEND_STATUS
:
3712 case ISTATE_SEND_ASYNCMSG
:
3713 case ISTATE_SEND_NOPIN
:
3714 case ISTATE_SEND_STATUS_RECOVERY
:
3715 case ISTATE_SEND_TEXTRSP
:
3719 case ISTATE_SEND_REJECT
:
3721 if (cmd
->cmd_flags
& ICF_REJECT_FAIL_CONN
) {
3722 cmd
->cmd_flags
&= ~ICF_REJECT_FAIL_CONN
;
3723 spin_unlock_bh(&cmd
->istate_lock
);
3724 complete(&cmd
->reject_comp
);
3727 complete(&cmd
->reject_comp
);
3729 case ISTATE_SEND_TASKMGTRSP
:
3733 case ISTATE_SEND_LOGOUTRSP
:
3734 spin_unlock_bh(&cmd
->istate_lock
);
3735 if (!iscsit_logout_post_handler(cmd
, conn
))
3737 spin_lock_bh(&cmd
->istate_lock
);
3742 pr_err("Unknown Opcode: 0x%02x ITT:"
3743 " 0x%08x, i_state: %d on CID: %hu\n",
3744 cmd
->iscsi_opcode
, cmd
->init_task_tag
,
3745 cmd
->i_state
, conn
->cid
);
3746 spin_unlock_bh(&cmd
->istate_lock
);
3751 cmd
->i_state
= ISTATE_SENT_STATUS
;
3754 spin_unlock_bh(&cmd
->istate_lock
);
3756 if (atomic_read(&conn
->check_immediate_queue
))
3761 conn
->tx_response_queue
= 0;
3765 iscsit_take_action_for_connection_exit(conn
);
3771 int iscsi_target_rx_thread(void *arg
)
3774 u8 buffer
[ISCSI_HDR_LEN
], opcode
;
3775 u32 checksum
= 0, digest
= 0;
3776 struct iscsi_conn
*conn
= NULL
;
3777 struct iscsi_thread_set
*ts
= (struct iscsi_thread_set
*)arg
;
3780 * Allow ourselves to be interrupted by SIGINT so that a
3781 * connection recovery / failure event can be triggered externally.
3783 allow_signal(SIGINT
);
3786 conn
= iscsi_rx_thread_pre_handler(ts
);
3790 while (!kthread_should_stop()) {
3792 * Ensure that both TX and RX per connection kthreads
3793 * are scheduled to run on the same CPU.
3795 iscsit_thread_check_cpumask(conn
, current
, 0);
3797 memset(buffer
, 0, ISCSI_HDR_LEN
);
3798 memset(&iov
, 0, sizeof(struct kvec
));
3800 iov
.iov_base
= buffer
;
3801 iov
.iov_len
= ISCSI_HDR_LEN
;
3803 ret
= rx_data(conn
, &iov
, 1, ISCSI_HDR_LEN
);
3804 if (ret
!= ISCSI_HDR_LEN
) {
3805 iscsit_rx_thread_wait_for_tcp(conn
);
3810 * Set conn->bad_hdr for use with REJECT PDUs.
3812 memcpy(&conn
->bad_hdr
, &buffer
, ISCSI_HDR_LEN
);
3814 if (conn
->conn_ops
->HeaderDigest
) {
3815 iov
.iov_base
= &digest
;
3816 iov
.iov_len
= ISCSI_CRC_LEN
;
3818 ret
= rx_data(conn
, &iov
, 1, ISCSI_CRC_LEN
);
3819 if (ret
!= ISCSI_CRC_LEN
) {
3820 iscsit_rx_thread_wait_for_tcp(conn
);
3824 iscsit_do_crypto_hash_buf(&conn
->conn_rx_hash
,
3825 buffer
, ISCSI_HDR_LEN
,
3826 0, NULL
, (u8
*)&checksum
);
3828 if (digest
!= checksum
) {
3829 pr_err("HeaderDigest CRC32C failed,"
3830 " received 0x%08x, computed 0x%08x\n",
3833 * Set the PDU to 0xff so it will intentionally
3834 * hit default in the switch below.
3836 memset(buffer
, 0xff, ISCSI_HDR_LEN
);
3837 spin_lock_bh(&conn
->sess
->session_stats_lock
);
3838 conn
->sess
->conn_digest_errors
++;
3839 spin_unlock_bh(&conn
->sess
->session_stats_lock
);
3841 pr_debug("Got HeaderDigest CRC32C"
3842 " 0x%08x\n", checksum
);
3846 if (conn
->conn_state
== TARG_CONN_STATE_IN_LOGOUT
)
3849 opcode
= buffer
[0] & ISCSI_OPCODE_MASK
;
3851 if (conn
->sess
->sess_ops
->SessionType
&&
3852 ((!(opcode
& ISCSI_OP_TEXT
)) ||
3853 (!(opcode
& ISCSI_OP_LOGOUT
)))) {
3854 pr_err("Received illegal iSCSI Opcode: 0x%02x"
3855 " while in Discovery Session, rejecting.\n", opcode
);
3856 iscsit_add_reject(ISCSI_REASON_PROTOCOL_ERROR
, 1,
3862 case ISCSI_OP_SCSI_CMD
:
3863 if (iscsit_handle_scsi_cmd(conn
, buffer
) < 0)
3866 case ISCSI_OP_SCSI_DATA_OUT
:
3867 if (iscsit_handle_data_out(conn
, buffer
) < 0)
3870 case ISCSI_OP_NOOP_OUT
:
3871 if (iscsit_handle_nop_out(conn
, buffer
) < 0)
3874 case ISCSI_OP_SCSI_TMFUNC
:
3875 if (iscsit_handle_task_mgt_cmd(conn
, buffer
) < 0)
3879 if (iscsit_handle_text_cmd(conn
, buffer
) < 0)
3882 case ISCSI_OP_LOGOUT
:
3883 ret
= iscsit_handle_logout_cmd(conn
, buffer
);
3885 wait_for_completion_timeout(&conn
->conn_logout_comp
,
3886 SECONDS_FOR_LOGOUT_COMP
* HZ
);
3891 case ISCSI_OP_SNACK
:
3892 if (iscsit_handle_snack(conn
, buffer
) < 0)
3896 pr_err("Got unknown iSCSI OpCode: 0x%02x\n",
3898 if (!conn
->sess
->sess_ops
->ErrorRecoveryLevel
) {
3899 pr_err("Cannot recover from unknown"
3900 " opcode while ERL=0, closing iSCSI connection"
3904 if (!conn
->conn_ops
->OFMarker
) {
3905 pr_err("Unable to recover from unknown"
3906 " opcode while OFMarker=No, closing iSCSI"
3910 if (iscsit_recover_from_unknown_opcode(conn
) < 0) {
3911 pr_err("Unable to recover from unknown"
3912 " opcode, closing iSCSI connection.\n");
3920 if (!signal_pending(current
))
3921 atomic_set(&conn
->transport_failed
, 1);
3922 iscsit_take_action_for_connection_exit(conn
);
3928 static void iscsit_release_commands_from_conn(struct iscsi_conn
*conn
)
3930 struct iscsi_cmd
*cmd
= NULL
, *cmd_tmp
= NULL
;
3931 struct iscsi_session
*sess
= conn
->sess
;
3933 * We expect this function to only ever be called from either RX or TX
3934 * thread context via iscsit_close_connection() once the other context
3935 * has been reset -> returned sleeping pre-handler state.
3937 spin_lock_bh(&conn
->cmd_lock
);
3938 list_for_each_entry_safe(cmd
, cmd_tmp
, &conn
->conn_cmd_list
, i_list
) {
3940 list_del(&cmd
->i_list
);
3941 spin_unlock_bh(&conn
->cmd_lock
);
3943 iscsit_increment_maxcmdsn(cmd
, sess
);
3945 iscsit_free_cmd(cmd
);
3947 spin_lock_bh(&conn
->cmd_lock
);
3949 spin_unlock_bh(&conn
->cmd_lock
);
3952 static void iscsit_stop_timers_for_cmds(
3953 struct iscsi_conn
*conn
)
3955 struct iscsi_cmd
*cmd
;
3957 spin_lock_bh(&conn
->cmd_lock
);
3958 list_for_each_entry(cmd
, &conn
->conn_cmd_list
, i_list
) {
3959 if (cmd
->data_direction
== DMA_TO_DEVICE
)
3960 iscsit_stop_dataout_timer(cmd
);
3962 spin_unlock_bh(&conn
->cmd_lock
);
3965 int iscsit_close_connection(
3966 struct iscsi_conn
*conn
)
3968 int conn_logout
= (conn
->conn_state
== TARG_CONN_STATE_IN_LOGOUT
);
3969 struct iscsi_session
*sess
= conn
->sess
;
3971 pr_debug("Closing iSCSI connection CID %hu on SID:"
3972 " %u\n", conn
->cid
, sess
->sid
);
3974 * Always up conn_logout_comp just in case the RX Thread is sleeping
3975 * and the logout response never got sent because the connection
3978 complete(&conn
->conn_logout_comp
);
3980 iscsi_release_thread_set(conn
);
3982 iscsit_stop_timers_for_cmds(conn
);
3983 iscsit_stop_nopin_response_timer(conn
);
3984 iscsit_stop_nopin_timer(conn
);
3985 iscsit_free_queue_reqs_for_conn(conn
);
3988 * During Connection recovery drop unacknowledged out of order
3989 * commands for this connection, and prepare the other commands
3992 * During normal operation clear the out of order commands (but
3993 * do not free the struct iscsi_ooo_cmdsn's) and release all
3994 * struct iscsi_cmds.
3996 if (atomic_read(&conn
->connection_recovery
)) {
3997 iscsit_discard_unacknowledged_ooo_cmdsns_for_conn(conn
);
3998 iscsit_prepare_cmds_for_realligance(conn
);
4000 iscsit_clear_ooo_cmdsns_for_conn(conn
);
4001 iscsit_release_commands_from_conn(conn
);
4005 * Handle decrementing session or connection usage count if
4006 * a logout response was not able to be sent because the
4007 * connection failed. Fall back to Session Recovery here.
4009 if (atomic_read(&conn
->conn_logout_remove
)) {
4010 if (conn
->conn_logout_reason
== ISCSI_LOGOUT_REASON_CLOSE_SESSION
) {
4011 iscsit_dec_conn_usage_count(conn
);
4012 iscsit_dec_session_usage_count(sess
);
4014 if (conn
->conn_logout_reason
== ISCSI_LOGOUT_REASON_CLOSE_CONNECTION
)
4015 iscsit_dec_conn_usage_count(conn
);
4017 atomic_set(&conn
->conn_logout_remove
, 0);
4018 atomic_set(&sess
->session_reinstatement
, 0);
4019 atomic_set(&sess
->session_fall_back_to_erl0
, 1);
4022 spin_lock_bh(&sess
->conn_lock
);
4023 list_del(&conn
->conn_list
);
4026 * Attempt to let the Initiator know this connection failed by
4027 * sending an Connection Dropped Async Message on another
4028 * active connection.
4030 if (atomic_read(&conn
->connection_recovery
))
4031 iscsit_build_conn_drop_async_message(conn
);
4033 spin_unlock_bh(&sess
->conn_lock
);
4036 * If connection reinstatement is being performed on this connection,
4037 * up the connection reinstatement semaphore that is being blocked on
4038 * in iscsit_cause_connection_reinstatement().
4040 spin_lock_bh(&conn
->state_lock
);
4041 if (atomic_read(&conn
->sleep_on_conn_wait_comp
)) {
4042 spin_unlock_bh(&conn
->state_lock
);
4043 complete(&conn
->conn_wait_comp
);
4044 wait_for_completion(&conn
->conn_post_wait_comp
);
4045 spin_lock_bh(&conn
->state_lock
);
4049 * If connection reinstatement is being performed on this connection
4050 * by receiving a REMOVECONNFORRECOVERY logout request, up the
4051 * connection wait rcfr semaphore that is being blocked on
4052 * an iscsit_connection_reinstatement_rcfr().
4054 if (atomic_read(&conn
->connection_wait_rcfr
)) {
4055 spin_unlock_bh(&conn
->state_lock
);
4056 complete(&conn
->conn_wait_rcfr_comp
);
4057 wait_for_completion(&conn
->conn_post_wait_comp
);
4058 spin_lock_bh(&conn
->state_lock
);
4060 atomic_set(&conn
->connection_reinstatement
, 1);
4061 spin_unlock_bh(&conn
->state_lock
);
4064 * If any other processes are accessing this connection pointer we
4065 * must wait until they have completed.
4067 iscsit_check_conn_usage_count(conn
);
4069 if (conn
->conn_rx_hash
.tfm
)
4070 crypto_free_hash(conn
->conn_rx_hash
.tfm
);
4071 if (conn
->conn_tx_hash
.tfm
)
4072 crypto_free_hash(conn
->conn_tx_hash
.tfm
);
4074 if (conn
->conn_cpumask
)
4075 free_cpumask_var(conn
->conn_cpumask
);
4077 kfree(conn
->conn_ops
);
4078 conn
->conn_ops
= NULL
;
4081 if (conn
->conn_flags
& CONNFLAG_SCTP_STRUCT_FILE
) {
4082 kfree(conn
->sock
->file
);
4083 conn
->sock
->file
= NULL
;
4085 sock_release(conn
->sock
);
4087 conn
->thread_set
= NULL
;
4089 pr_debug("Moving to TARG_CONN_STATE_FREE.\n");
4090 conn
->conn_state
= TARG_CONN_STATE_FREE
;
4093 spin_lock_bh(&sess
->conn_lock
);
4094 atomic_dec(&sess
->nconn
);
4095 pr_debug("Decremented iSCSI connection count to %hu from node:"
4096 " %s\n", atomic_read(&sess
->nconn
),
4097 sess
->sess_ops
->InitiatorName
);
4099 * Make sure that if one connection fails in an non ERL=2 iSCSI
4100 * Session that they all fail.
4102 if ((sess
->sess_ops
->ErrorRecoveryLevel
!= 2) && !conn_logout
&&
4103 !atomic_read(&sess
->session_logout
))
4104 atomic_set(&sess
->session_fall_back_to_erl0
, 1);
4107 * If this was not the last connection in the session, and we are
4108 * performing session reinstatement or falling back to ERL=0, call
4109 * iscsit_stop_session() without sleeping to shutdown the other
4110 * active connections.
4112 if (atomic_read(&sess
->nconn
)) {
4113 if (!atomic_read(&sess
->session_reinstatement
) &&
4114 !atomic_read(&sess
->session_fall_back_to_erl0
)) {
4115 spin_unlock_bh(&sess
->conn_lock
);
4118 if (!atomic_read(&sess
->session_stop_active
)) {
4119 atomic_set(&sess
->session_stop_active
, 1);
4120 spin_unlock_bh(&sess
->conn_lock
);
4121 iscsit_stop_session(sess
, 0, 0);
4124 spin_unlock_bh(&sess
->conn_lock
);
4129 * If this was the last connection in the session and one of the
4130 * following is occurring:
4132 * Session Reinstatement is not being performed, and are falling back
4133 * to ERL=0 call iscsit_close_session().
4135 * Session Logout was requested. iscsit_close_session() will be called
4138 * Session Continuation is not being performed, start the Time2Retain
4139 * handler and check if sleep_on_sess_wait_sem is active.
4141 if (!atomic_read(&sess
->session_reinstatement
) &&
4142 atomic_read(&sess
->session_fall_back_to_erl0
)) {
4143 spin_unlock_bh(&sess
->conn_lock
);
4144 iscsit_close_session(sess
);
4147 } else if (atomic_read(&sess
->session_logout
)) {
4148 pr_debug("Moving to TARG_SESS_STATE_FREE.\n");
4149 sess
->session_state
= TARG_SESS_STATE_FREE
;
4150 spin_unlock_bh(&sess
->conn_lock
);
4152 if (atomic_read(&sess
->sleep_on_sess_wait_comp
))
4153 complete(&sess
->session_wait_comp
);
4157 pr_debug("Moving to TARG_SESS_STATE_FAILED.\n");
4158 sess
->session_state
= TARG_SESS_STATE_FAILED
;
4160 if (!atomic_read(&sess
->session_continuation
)) {
4161 spin_unlock_bh(&sess
->conn_lock
);
4162 iscsit_start_time2retain_handler(sess
);
4164 spin_unlock_bh(&sess
->conn_lock
);
4166 if (atomic_read(&sess
->sleep_on_sess_wait_comp
))
4167 complete(&sess
->session_wait_comp
);
4171 spin_unlock_bh(&sess
->conn_lock
);
4176 int iscsit_close_session(struct iscsi_session
*sess
)
4178 struct iscsi_portal_group
*tpg
= ISCSI_TPG_S(sess
);
4179 struct se_portal_group
*se_tpg
= &tpg
->tpg_se_tpg
;
4181 if (atomic_read(&sess
->nconn
)) {
4182 pr_err("%d connection(s) still exist for iSCSI session"
4183 " to %s\n", atomic_read(&sess
->nconn
),
4184 sess
->sess_ops
->InitiatorName
);
4188 spin_lock_bh(&se_tpg
->session_lock
);
4189 atomic_set(&sess
->session_logout
, 1);
4190 atomic_set(&sess
->session_reinstatement
, 1);
4191 iscsit_stop_time2retain_timer(sess
);
4192 spin_unlock_bh(&se_tpg
->session_lock
);
4195 * transport_deregister_session_configfs() will clear the
4196 * struct se_node_acl->nacl_sess pointer now as a iscsi_np process context
4197 * can be setting it again with __transport_register_session() in
4198 * iscsi_post_login_handler() again after the iscsit_stop_session()
4199 * completes in iscsi_np context.
4201 transport_deregister_session_configfs(sess
->se_sess
);
4204 * If any other processes are accessing this session pointer we must
4205 * wait until they have completed. If we are in an interrupt (the
4206 * time2retain handler) and contain and active session usage count we
4207 * restart the timer and exit.
4209 if (!in_interrupt()) {
4210 if (iscsit_check_session_usage_count(sess
) == 1)
4211 iscsit_stop_session(sess
, 1, 1);
4213 if (iscsit_check_session_usage_count(sess
) == 2) {
4214 atomic_set(&sess
->session_logout
, 0);
4215 iscsit_start_time2retain_handler(sess
);
4220 transport_deregister_session(sess
->se_sess
);
4222 if (sess
->sess_ops
->ErrorRecoveryLevel
== 2)
4223 iscsit_free_connection_recovery_entires(sess
);
4225 iscsit_free_all_ooo_cmdsns(sess
);
4227 spin_lock_bh(&se_tpg
->session_lock
);
4228 pr_debug("Moving to TARG_SESS_STATE_FREE.\n");
4229 sess
->session_state
= TARG_SESS_STATE_FREE
;
4230 pr_debug("Released iSCSI session from node: %s\n",
4231 sess
->sess_ops
->InitiatorName
);
4234 tpg
->tpg_tiqn
->tiqn_nsessions
--;
4236 pr_debug("Decremented number of active iSCSI Sessions on"
4237 " iSCSI TPG: %hu to %u\n", tpg
->tpgt
, tpg
->nsessions
);
4239 spin_lock(&sess_idr_lock
);
4240 idr_remove(&sess_idr
, sess
->session_index
);
4241 spin_unlock(&sess_idr_lock
);
4243 kfree(sess
->sess_ops
);
4244 sess
->sess_ops
= NULL
;
4245 spin_unlock_bh(&se_tpg
->session_lock
);
4251 static void iscsit_logout_post_handler_closesession(
4252 struct iscsi_conn
*conn
)
4254 struct iscsi_session
*sess
= conn
->sess
;
4256 iscsi_set_thread_clear(conn
, ISCSI_CLEAR_TX_THREAD
);
4257 iscsi_set_thread_set_signal(conn
, ISCSI_SIGNAL_TX_THREAD
);
4259 atomic_set(&conn
->conn_logout_remove
, 0);
4260 complete(&conn
->conn_logout_comp
);
4262 iscsit_dec_conn_usage_count(conn
);
4263 iscsit_stop_session(sess
, 1, 1);
4264 iscsit_dec_session_usage_count(sess
);
4265 iscsit_close_session(sess
);
4268 static void iscsit_logout_post_handler_samecid(
4269 struct iscsi_conn
*conn
)
4271 iscsi_set_thread_clear(conn
, ISCSI_CLEAR_TX_THREAD
);
4272 iscsi_set_thread_set_signal(conn
, ISCSI_SIGNAL_TX_THREAD
);
4274 atomic_set(&conn
->conn_logout_remove
, 0);
4275 complete(&conn
->conn_logout_comp
);
4277 iscsit_cause_connection_reinstatement(conn
, 1);
4278 iscsit_dec_conn_usage_count(conn
);
4281 static void iscsit_logout_post_handler_diffcid(
4282 struct iscsi_conn
*conn
,
4285 struct iscsi_conn
*l_conn
;
4286 struct iscsi_session
*sess
= conn
->sess
;
4291 spin_lock_bh(&sess
->conn_lock
);
4292 list_for_each_entry(l_conn
, &sess
->sess_conn_list
, conn_list
) {
4293 if (l_conn
->cid
== cid
) {
4294 iscsit_inc_conn_usage_count(l_conn
);
4298 spin_unlock_bh(&sess
->conn_lock
);
4304 l_conn
->sock
->ops
->shutdown(l_conn
->sock
, RCV_SHUTDOWN
);
4306 spin_lock_bh(&l_conn
->state_lock
);
4307 pr_debug("Moving to TARG_CONN_STATE_IN_LOGOUT.\n");
4308 l_conn
->conn_state
= TARG_CONN_STATE_IN_LOGOUT
;
4309 spin_unlock_bh(&l_conn
->state_lock
);
4311 iscsit_cause_connection_reinstatement(l_conn
, 1);
4312 iscsit_dec_conn_usage_count(l_conn
);
4316 * Return of 0 causes the TX thread to restart.
4318 static int iscsit_logout_post_handler(
4319 struct iscsi_cmd
*cmd
,
4320 struct iscsi_conn
*conn
)
4324 switch (cmd
->logout_reason
) {
4325 case ISCSI_LOGOUT_REASON_CLOSE_SESSION
:
4326 switch (cmd
->logout_response
) {
4327 case ISCSI_LOGOUT_SUCCESS
:
4328 case ISCSI_LOGOUT_CLEANUP_FAILED
:
4330 iscsit_logout_post_handler_closesession(conn
);
4335 case ISCSI_LOGOUT_REASON_CLOSE_CONNECTION
:
4336 if (conn
->cid
== cmd
->logout_cid
) {
4337 switch (cmd
->logout_response
) {
4338 case ISCSI_LOGOUT_SUCCESS
:
4339 case ISCSI_LOGOUT_CLEANUP_FAILED
:
4341 iscsit_logout_post_handler_samecid(conn
);
4346 switch (cmd
->logout_response
) {
4347 case ISCSI_LOGOUT_SUCCESS
:
4348 iscsit_logout_post_handler_diffcid(conn
,
4351 case ISCSI_LOGOUT_CID_NOT_FOUND
:
4352 case ISCSI_LOGOUT_CLEANUP_FAILED
:
4359 case ISCSI_LOGOUT_REASON_RECOVERY
:
4360 switch (cmd
->logout_response
) {
4361 case ISCSI_LOGOUT_SUCCESS
:
4362 case ISCSI_LOGOUT_CID_NOT_FOUND
:
4363 case ISCSI_LOGOUT_RECOVERY_UNSUPPORTED
:
4364 case ISCSI_LOGOUT_CLEANUP_FAILED
:
4377 void iscsit_fail_session(struct iscsi_session
*sess
)
4379 struct iscsi_conn
*conn
;
4381 spin_lock_bh(&sess
->conn_lock
);
4382 list_for_each_entry(conn
, &sess
->sess_conn_list
, conn_list
) {
4383 pr_debug("Moving to TARG_CONN_STATE_CLEANUP_WAIT.\n");
4384 conn
->conn_state
= TARG_CONN_STATE_CLEANUP_WAIT
;
4386 spin_unlock_bh(&sess
->conn_lock
);
4388 pr_debug("Moving to TARG_SESS_STATE_FAILED.\n");
4389 sess
->session_state
= TARG_SESS_STATE_FAILED
;
4392 int iscsit_free_session(struct iscsi_session
*sess
)
4394 u16 conn_count
= atomic_read(&sess
->nconn
);
4395 struct iscsi_conn
*conn
, *conn_tmp
= NULL
;
4398 spin_lock_bh(&sess
->conn_lock
);
4399 atomic_set(&sess
->sleep_on_sess_wait_comp
, 1);
4401 list_for_each_entry_safe(conn
, conn_tmp
, &sess
->sess_conn_list
,
4403 if (conn_count
== 0)
4406 if (list_is_last(&conn
->conn_list
, &sess
->sess_conn_list
)) {
4409 iscsit_inc_conn_usage_count(conn_tmp
);
4412 iscsit_inc_conn_usage_count(conn
);
4414 spin_unlock_bh(&sess
->conn_lock
);
4415 iscsit_cause_connection_reinstatement(conn
, 1);
4416 spin_lock_bh(&sess
->conn_lock
);
4418 iscsit_dec_conn_usage_count(conn
);
4420 iscsit_dec_conn_usage_count(conn_tmp
);
4425 if (atomic_read(&sess
->nconn
)) {
4426 spin_unlock_bh(&sess
->conn_lock
);
4427 wait_for_completion(&sess
->session_wait_comp
);
4429 spin_unlock_bh(&sess
->conn_lock
);
4431 iscsit_close_session(sess
);
4435 void iscsit_stop_session(
4436 struct iscsi_session
*sess
,
4438 int connection_sleep
)
4440 u16 conn_count
= atomic_read(&sess
->nconn
);
4441 struct iscsi_conn
*conn
, *conn_tmp
= NULL
;
4444 spin_lock_bh(&sess
->conn_lock
);
4446 atomic_set(&sess
->sleep_on_sess_wait_comp
, 1);
4448 if (connection_sleep
) {
4449 list_for_each_entry_safe(conn
, conn_tmp
, &sess
->sess_conn_list
,
4451 if (conn_count
== 0)
4454 if (list_is_last(&conn
->conn_list
, &sess
->sess_conn_list
)) {
4457 iscsit_inc_conn_usage_count(conn_tmp
);
4460 iscsit_inc_conn_usage_count(conn
);
4462 spin_unlock_bh(&sess
->conn_lock
);
4463 iscsit_cause_connection_reinstatement(conn
, 1);
4464 spin_lock_bh(&sess
->conn_lock
);
4466 iscsit_dec_conn_usage_count(conn
);
4468 iscsit_dec_conn_usage_count(conn_tmp
);
4472 list_for_each_entry(conn
, &sess
->sess_conn_list
, conn_list
)
4473 iscsit_cause_connection_reinstatement(conn
, 0);
4476 if (session_sleep
&& atomic_read(&sess
->nconn
)) {
4477 spin_unlock_bh(&sess
->conn_lock
);
4478 wait_for_completion(&sess
->session_wait_comp
);
4480 spin_unlock_bh(&sess
->conn_lock
);
4483 int iscsit_release_sessions_for_tpg(struct iscsi_portal_group
*tpg
, int force
)
4485 struct iscsi_session
*sess
;
4486 struct se_portal_group
*se_tpg
= &tpg
->tpg_se_tpg
;
4487 struct se_session
*se_sess
, *se_sess_tmp
;
4488 int session_count
= 0;
4490 spin_lock_bh(&se_tpg
->session_lock
);
4491 if (tpg
->nsessions
&& !force
) {
4492 spin_unlock_bh(&se_tpg
->session_lock
);
4496 list_for_each_entry_safe(se_sess
, se_sess_tmp
, &se_tpg
->tpg_sess_list
,
4498 sess
= (struct iscsi_session
*)se_sess
->fabric_sess_ptr
;
4500 spin_lock(&sess
->conn_lock
);
4501 if (atomic_read(&sess
->session_fall_back_to_erl0
) ||
4502 atomic_read(&sess
->session_logout
) ||
4503 (sess
->time2retain_timer_flags
& ISCSI_TF_EXPIRED
)) {
4504 spin_unlock(&sess
->conn_lock
);
4507 atomic_set(&sess
->session_reinstatement
, 1);
4508 spin_unlock(&sess
->conn_lock
);
4509 spin_unlock_bh(&se_tpg
->session_lock
);
4511 iscsit_free_session(sess
);
4512 spin_lock_bh(&se_tpg
->session_lock
);
4516 spin_unlock_bh(&se_tpg
->session_lock
);
4518 pr_debug("Released %d iSCSI Session(s) from Target Portal"
4519 " Group: %hu\n", session_count
, tpg
->tpgt
);
4523 MODULE_DESCRIPTION("iSCSI-Target Driver for mainline target infrastructure");
4524 MODULE_VERSION("4.1.x");
4525 MODULE_AUTHOR("nab@Linux-iSCSI.org");
4526 MODULE_LICENSE("GPL");
4528 module_init(iscsi_target_init_module
);
4529 module_exit(iscsi_target_cleanup_module
);