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 <linux/idr.h>
27 #include <asm/unaligned.h>
28 #include <scsi/scsi_device.h>
29 #include <scsi/iscsi_proto.h>
30 #include <scsi/scsi_tcq.h>
31 #include <target/target_core_base.h>
32 #include <target/target_core_fabric.h>
33 #include <target/target_core_configfs.h>
35 #include "iscsi_target_core.h"
36 #include "iscsi_target_parameters.h"
37 #include "iscsi_target_seq_pdu_list.h"
38 #include "iscsi_target_tq.h"
39 #include "iscsi_target_configfs.h"
40 #include "iscsi_target_datain_values.h"
41 #include "iscsi_target_erl0.h"
42 #include "iscsi_target_erl1.h"
43 #include "iscsi_target_erl2.h"
44 #include "iscsi_target_login.h"
45 #include "iscsi_target_tmr.h"
46 #include "iscsi_target_tpg.h"
47 #include "iscsi_target_util.h"
48 #include "iscsi_target.h"
49 #include "iscsi_target_device.h"
50 #include "iscsi_target_stat.h"
52 static LIST_HEAD(g_tiqn_list
);
53 static LIST_HEAD(g_np_list
);
54 static DEFINE_SPINLOCK(tiqn_lock
);
55 static DEFINE_SPINLOCK(np_lock
);
57 static struct idr tiqn_idr
;
59 struct mutex auth_id_lock
;
60 spinlock_t sess_idr_lock
;
62 struct iscsit_global
*iscsit_global
;
64 struct kmem_cache
*lio_cmd_cache
;
65 struct kmem_cache
*lio_qr_cache
;
66 struct kmem_cache
*lio_dr_cache
;
67 struct kmem_cache
*lio_ooo_cache
;
68 struct kmem_cache
*lio_r2t_cache
;
70 static int iscsit_handle_immediate_data(struct iscsi_cmd
*,
71 unsigned char *buf
, u32
);
72 static int iscsit_logout_post_handler(struct iscsi_cmd
*, struct iscsi_conn
*);
74 struct iscsi_tiqn
*iscsit_get_tiqn_for_login(unsigned char *buf
)
76 struct iscsi_tiqn
*tiqn
= NULL
;
78 spin_lock(&tiqn_lock
);
79 list_for_each_entry(tiqn
, &g_tiqn_list
, tiqn_list
) {
80 if (!strcmp(tiqn
->tiqn
, buf
)) {
82 spin_lock(&tiqn
->tiqn_state_lock
);
83 if (tiqn
->tiqn_state
== TIQN_STATE_ACTIVE
) {
84 tiqn
->tiqn_access_count
++;
85 spin_unlock(&tiqn
->tiqn_state_lock
);
86 spin_unlock(&tiqn_lock
);
89 spin_unlock(&tiqn
->tiqn_state_lock
);
92 spin_unlock(&tiqn_lock
);
97 static int iscsit_set_tiqn_shutdown(struct iscsi_tiqn
*tiqn
)
99 spin_lock(&tiqn
->tiqn_state_lock
);
100 if (tiqn
->tiqn_state
== TIQN_STATE_ACTIVE
) {
101 tiqn
->tiqn_state
= TIQN_STATE_SHUTDOWN
;
102 spin_unlock(&tiqn
->tiqn_state_lock
);
105 spin_unlock(&tiqn
->tiqn_state_lock
);
110 void iscsit_put_tiqn_for_login(struct iscsi_tiqn
*tiqn
)
112 spin_lock(&tiqn
->tiqn_state_lock
);
113 tiqn
->tiqn_access_count
--;
114 spin_unlock(&tiqn
->tiqn_state_lock
);
118 * Note that IQN formatting is expected to be done in userspace, and
119 * no explict IQN format checks are done here.
121 struct iscsi_tiqn
*iscsit_add_tiqn(unsigned char *buf
)
123 struct iscsi_tiqn
*tiqn
= NULL
;
126 if (strlen(buf
) >= ISCSI_IQN_LEN
) {
127 pr_err("Target IQN exceeds %d bytes\n",
129 return ERR_PTR(-EINVAL
);
132 tiqn
= kzalloc(sizeof(struct iscsi_tiqn
), GFP_KERNEL
);
134 pr_err("Unable to allocate struct iscsi_tiqn\n");
135 return ERR_PTR(-ENOMEM
);
138 sprintf(tiqn
->tiqn
, "%s", buf
);
139 INIT_LIST_HEAD(&tiqn
->tiqn_list
);
140 INIT_LIST_HEAD(&tiqn
->tiqn_tpg_list
);
141 spin_lock_init(&tiqn
->tiqn_state_lock
);
142 spin_lock_init(&tiqn
->tiqn_tpg_lock
);
143 spin_lock_init(&tiqn
->sess_err_stats
.lock
);
144 spin_lock_init(&tiqn
->login_stats
.lock
);
145 spin_lock_init(&tiqn
->logout_stats
.lock
);
147 if (!idr_pre_get(&tiqn_idr
, GFP_KERNEL
)) {
148 pr_err("idr_pre_get() for tiqn_idr failed\n");
150 return ERR_PTR(-ENOMEM
);
152 tiqn
->tiqn_state
= TIQN_STATE_ACTIVE
;
154 spin_lock(&tiqn_lock
);
155 ret
= idr_get_new(&tiqn_idr
, NULL
, &tiqn
->tiqn_index
);
157 pr_err("idr_get_new() failed for tiqn->tiqn_index\n");
158 spin_unlock(&tiqn_lock
);
162 list_add_tail(&tiqn
->tiqn_list
, &g_tiqn_list
);
163 spin_unlock(&tiqn_lock
);
165 pr_debug("CORE[0] - Added iSCSI Target IQN: %s\n", tiqn
->tiqn
);
171 static void iscsit_wait_for_tiqn(struct iscsi_tiqn
*tiqn
)
174 * Wait for accesses to said struct iscsi_tiqn to end.
176 spin_lock(&tiqn
->tiqn_state_lock
);
177 while (tiqn
->tiqn_access_count
!= 0) {
178 spin_unlock(&tiqn
->tiqn_state_lock
);
180 spin_lock(&tiqn
->tiqn_state_lock
);
182 spin_unlock(&tiqn
->tiqn_state_lock
);
185 void iscsit_del_tiqn(struct iscsi_tiqn
*tiqn
)
188 * iscsit_set_tiqn_shutdown sets tiqn->tiqn_state = TIQN_STATE_SHUTDOWN
189 * while holding tiqn->tiqn_state_lock. This means that all subsequent
190 * attempts to access this struct iscsi_tiqn will fail from both transport
191 * fabric and control code paths.
193 if (iscsit_set_tiqn_shutdown(tiqn
) < 0) {
194 pr_err("iscsit_set_tiqn_shutdown() failed\n");
198 iscsit_wait_for_tiqn(tiqn
);
200 spin_lock(&tiqn_lock
);
201 list_del(&tiqn
->tiqn_list
);
202 idr_remove(&tiqn_idr
, tiqn
->tiqn_index
);
203 spin_unlock(&tiqn_lock
);
205 pr_debug("CORE[0] - Deleted iSCSI Target IQN: %s\n",
210 int iscsit_access_np(struct iscsi_np
*np
, struct iscsi_portal_group
*tpg
)
214 * Determine if the network portal is accepting storage traffic.
216 spin_lock_bh(&np
->np_thread_lock
);
217 if (np
->np_thread_state
!= ISCSI_NP_THREAD_ACTIVE
) {
218 spin_unlock_bh(&np
->np_thread_lock
);
221 if (np
->np_login_tpg
) {
222 pr_err("np->np_login_tpg() is not NULL!\n");
223 spin_unlock_bh(&np
->np_thread_lock
);
226 spin_unlock_bh(&np
->np_thread_lock
);
228 * Determine if the portal group is accepting storage traffic.
230 spin_lock_bh(&tpg
->tpg_state_lock
);
231 if (tpg
->tpg_state
!= TPG_STATE_ACTIVE
) {
232 spin_unlock_bh(&tpg
->tpg_state_lock
);
235 spin_unlock_bh(&tpg
->tpg_state_lock
);
238 * Here we serialize access across the TIQN+TPG Tuple.
240 ret
= mutex_lock_interruptible(&tpg
->np_login_lock
);
241 if ((ret
!= 0) || signal_pending(current
))
244 spin_lock_bh(&np
->np_thread_lock
);
245 np
->np_login_tpg
= tpg
;
246 spin_unlock_bh(&np
->np_thread_lock
);
251 int iscsit_deaccess_np(struct iscsi_np
*np
, struct iscsi_portal_group
*tpg
)
253 struct iscsi_tiqn
*tiqn
= tpg
->tpg_tiqn
;
255 spin_lock_bh(&np
->np_thread_lock
);
256 np
->np_login_tpg
= NULL
;
257 spin_unlock_bh(&np
->np_thread_lock
);
259 mutex_unlock(&tpg
->np_login_lock
);
262 iscsit_put_tiqn_for_login(tiqn
);
267 static struct iscsi_np
*iscsit_get_np(
268 struct __kernel_sockaddr_storage
*sockaddr
,
269 int network_transport
)
271 struct sockaddr_in
*sock_in
, *sock_in_e
;
272 struct sockaddr_in6
*sock_in6
, *sock_in6_e
;
277 spin_lock_bh(&np_lock
);
278 list_for_each_entry(np
, &g_np_list
, np_list
) {
279 spin_lock(&np
->np_thread_lock
);
280 if (np
->np_thread_state
!= ISCSI_NP_THREAD_ACTIVE
) {
281 spin_unlock(&np
->np_thread_lock
);
285 if (sockaddr
->ss_family
== AF_INET6
) {
286 sock_in6
= (struct sockaddr_in6
*)sockaddr
;
287 sock_in6_e
= (struct sockaddr_in6
*)&np
->np_sockaddr
;
289 if (!memcmp(&sock_in6
->sin6_addr
.in6_u
,
290 &sock_in6_e
->sin6_addr
.in6_u
,
291 sizeof(struct in6_addr
)))
294 port
= ntohs(sock_in6
->sin6_port
);
296 sock_in
= (struct sockaddr_in
*)sockaddr
;
297 sock_in_e
= (struct sockaddr_in
*)&np
->np_sockaddr
;
299 if (sock_in
->sin_addr
.s_addr
==
300 sock_in_e
->sin_addr
.s_addr
)
303 port
= ntohs(sock_in
->sin_port
);
306 if ((ip_match
== 1) && (np
->np_port
== port
) &&
307 (np
->np_network_transport
== network_transport
)) {
309 * Increment the np_exports reference count now to
310 * prevent iscsit_del_np() below from being called
311 * while iscsi_tpg_add_network_portal() is called.
314 spin_unlock(&np
->np_thread_lock
);
315 spin_unlock_bh(&np_lock
);
318 spin_unlock(&np
->np_thread_lock
);
320 spin_unlock_bh(&np_lock
);
325 struct iscsi_np
*iscsit_add_np(
326 struct __kernel_sockaddr_storage
*sockaddr
,
328 int network_transport
)
330 struct sockaddr_in
*sock_in
;
331 struct sockaddr_in6
*sock_in6
;
335 * Locate the existing struct iscsi_np if already active..
337 np
= iscsit_get_np(sockaddr
, network_transport
);
341 np
= kzalloc(sizeof(struct iscsi_np
), GFP_KERNEL
);
343 pr_err("Unable to allocate memory for struct iscsi_np\n");
344 return ERR_PTR(-ENOMEM
);
347 np
->np_flags
|= NPF_IP_NETWORK
;
348 if (sockaddr
->ss_family
== AF_INET6
) {
349 sock_in6
= (struct sockaddr_in6
*)sockaddr
;
350 snprintf(np
->np_ip
, IPV6_ADDRESS_SPACE
, "%s", ip_str
);
351 np
->np_port
= ntohs(sock_in6
->sin6_port
);
353 sock_in
= (struct sockaddr_in
*)sockaddr
;
354 sprintf(np
->np_ip
, "%s", ip_str
);
355 np
->np_port
= ntohs(sock_in
->sin_port
);
358 np
->np_network_transport
= network_transport
;
359 spin_lock_init(&np
->np_thread_lock
);
360 init_completion(&np
->np_restart_comp
);
361 INIT_LIST_HEAD(&np
->np_list
);
363 ret
= iscsi_target_setup_login_socket(np
, sockaddr
);
369 np
->np_thread
= kthread_run(iscsi_target_login_thread
, np
, "iscsi_np");
370 if (IS_ERR(np
->np_thread
)) {
371 pr_err("Unable to create kthread: iscsi_np\n");
372 ret
= PTR_ERR(np
->np_thread
);
377 * Increment the np_exports reference count now to prevent
378 * iscsit_del_np() below from being run while a new call to
379 * iscsi_tpg_add_network_portal() for a matching iscsi_np is
380 * active. We don't need to hold np->np_thread_lock at this
381 * point because iscsi_np has not been added to g_np_list yet.
385 spin_lock_bh(&np_lock
);
386 list_add_tail(&np
->np_list
, &g_np_list
);
387 spin_unlock_bh(&np_lock
);
389 pr_debug("CORE[0] - Added Network Portal: %s:%hu on %s\n",
390 np
->np_ip
, np
->np_port
, (np
->np_network_transport
== ISCSI_TCP
) ?
396 int iscsit_reset_np_thread(
398 struct iscsi_tpg_np
*tpg_np
,
399 struct iscsi_portal_group
*tpg
)
401 spin_lock_bh(&np
->np_thread_lock
);
404 * The reset operation need only be performed when the
405 * passed struct iscsi_portal_group has a login in progress
406 * to one of the network portals.
408 if (tpg_np
->tpg_np
->np_login_tpg
!= tpg
) {
409 spin_unlock_bh(&np
->np_thread_lock
);
413 if (np
->np_thread_state
== ISCSI_NP_THREAD_INACTIVE
) {
414 spin_unlock_bh(&np
->np_thread_lock
);
417 np
->np_thread_state
= ISCSI_NP_THREAD_RESET
;
420 spin_unlock_bh(&np
->np_thread_lock
);
421 send_sig(SIGINT
, np
->np_thread
, 1);
422 wait_for_completion(&np
->np_restart_comp
);
423 spin_lock_bh(&np
->np_thread_lock
);
425 spin_unlock_bh(&np
->np_thread_lock
);
430 static int iscsit_del_np_comm(struct iscsi_np
*np
)
433 sock_release(np
->np_socket
);
437 int iscsit_del_np(struct iscsi_np
*np
)
439 spin_lock_bh(&np
->np_thread_lock
);
441 if (np
->np_exports
) {
442 spin_unlock_bh(&np
->np_thread_lock
);
445 np
->np_thread_state
= ISCSI_NP_THREAD_SHUTDOWN
;
446 spin_unlock_bh(&np
->np_thread_lock
);
450 * We need to send the signal to wakeup Linux/Net
451 * which may be sleeping in sock_accept()..
453 send_sig(SIGINT
, np
->np_thread
, 1);
454 kthread_stop(np
->np_thread
);
456 iscsit_del_np_comm(np
);
458 spin_lock_bh(&np_lock
);
459 list_del(&np
->np_list
);
460 spin_unlock_bh(&np_lock
);
462 pr_debug("CORE[0] - Removed Network Portal: %s:%hu on %s\n",
463 np
->np_ip
, np
->np_port
, (np
->np_network_transport
== ISCSI_TCP
) ?
470 static int __init
iscsi_target_init_module(void)
474 pr_debug("iSCSI-Target "ISCSIT_VERSION
"\n");
476 iscsit_global
= kzalloc(sizeof(struct iscsit_global
), GFP_KERNEL
);
477 if (!iscsit_global
) {
478 pr_err("Unable to allocate memory for iscsit_global\n");
481 mutex_init(&auth_id_lock
);
482 spin_lock_init(&sess_idr_lock
);
486 ret
= iscsi_target_register_configfs();
490 ret
= iscsi_thread_set_init();
494 if (iscsi_allocate_thread_sets(TARGET_THREAD_SET_COUNT
) !=
495 TARGET_THREAD_SET_COUNT
) {
496 pr_err("iscsi_allocate_thread_sets() returned"
497 " unexpected value!\n");
501 lio_cmd_cache
= kmem_cache_create("lio_cmd_cache",
502 sizeof(struct iscsi_cmd
), __alignof__(struct iscsi_cmd
),
504 if (!lio_cmd_cache
) {
505 pr_err("Unable to kmem_cache_create() for"
510 lio_qr_cache
= kmem_cache_create("lio_qr_cache",
511 sizeof(struct iscsi_queue_req
),
512 __alignof__(struct iscsi_queue_req
), 0, NULL
);
514 pr_err("nable to kmem_cache_create() for"
519 lio_dr_cache
= kmem_cache_create("lio_dr_cache",
520 sizeof(struct iscsi_datain_req
),
521 __alignof__(struct iscsi_datain_req
), 0, NULL
);
523 pr_err("Unable to kmem_cache_create() for"
528 lio_ooo_cache
= kmem_cache_create("lio_ooo_cache",
529 sizeof(struct iscsi_ooo_cmdsn
),
530 __alignof__(struct iscsi_ooo_cmdsn
), 0, NULL
);
531 if (!lio_ooo_cache
) {
532 pr_err("Unable to kmem_cache_create() for"
537 lio_r2t_cache
= kmem_cache_create("lio_r2t_cache",
538 sizeof(struct iscsi_r2t
), __alignof__(struct iscsi_r2t
),
540 if (!lio_r2t_cache
) {
541 pr_err("Unable to kmem_cache_create() for"
546 if (iscsit_load_discovery_tpg() < 0)
551 kmem_cache_destroy(lio_r2t_cache
);
553 kmem_cache_destroy(lio_ooo_cache
);
555 kmem_cache_destroy(lio_dr_cache
);
557 kmem_cache_destroy(lio_qr_cache
);
559 kmem_cache_destroy(lio_cmd_cache
);
561 iscsi_deallocate_thread_sets();
563 iscsi_thread_set_free();
565 iscsi_target_deregister_configfs();
567 kfree(iscsit_global
);
571 static void __exit
iscsi_target_cleanup_module(void)
573 iscsi_deallocate_thread_sets();
574 iscsi_thread_set_free();
575 iscsit_release_discovery_tpg();
576 kmem_cache_destroy(lio_cmd_cache
);
577 kmem_cache_destroy(lio_qr_cache
);
578 kmem_cache_destroy(lio_dr_cache
);
579 kmem_cache_destroy(lio_ooo_cache
);
580 kmem_cache_destroy(lio_r2t_cache
);
582 iscsi_target_deregister_configfs();
584 kfree(iscsit_global
);
587 static int iscsit_add_reject(
591 struct iscsi_conn
*conn
)
593 struct iscsi_cmd
*cmd
;
594 struct iscsi_reject
*hdr
;
597 cmd
= iscsit_allocate_cmd(conn
, GFP_KERNEL
);
601 cmd
->iscsi_opcode
= ISCSI_OP_REJECT
;
603 cmd
->cmd_flags
|= ICF_REJECT_FAIL_CONN
;
605 hdr
= (struct iscsi_reject
*) cmd
->pdu
;
606 hdr
->reason
= reason
;
608 cmd
->buf_ptr
= kmemdup(buf
, ISCSI_HDR_LEN
, GFP_KERNEL
);
610 pr_err("Unable to allocate memory for cmd->buf_ptr\n");
611 iscsit_release_cmd(cmd
);
615 spin_lock_bh(&conn
->cmd_lock
);
616 list_add_tail(&cmd
->i_conn_node
, &conn
->conn_cmd_list
);
617 spin_unlock_bh(&conn
->cmd_lock
);
619 cmd
->i_state
= ISTATE_SEND_REJECT
;
620 iscsit_add_cmd_to_response_queue(cmd
, conn
, cmd
->i_state
);
622 ret
= wait_for_completion_interruptible(&cmd
->reject_comp
);
626 return (!fail_conn
) ? 0 : -1;
629 int iscsit_add_reject_from_cmd(
634 struct iscsi_cmd
*cmd
)
636 struct iscsi_conn
*conn
;
637 struct iscsi_reject
*hdr
;
641 pr_err("cmd->conn is NULL for ITT: 0x%08x\n",
647 cmd
->iscsi_opcode
= ISCSI_OP_REJECT
;
649 cmd
->cmd_flags
|= ICF_REJECT_FAIL_CONN
;
651 hdr
= (struct iscsi_reject
*) cmd
->pdu
;
652 hdr
->reason
= reason
;
654 cmd
->buf_ptr
= kmemdup(buf
, ISCSI_HDR_LEN
, GFP_KERNEL
);
656 pr_err("Unable to allocate memory for cmd->buf_ptr\n");
657 iscsit_release_cmd(cmd
);
662 spin_lock_bh(&conn
->cmd_lock
);
663 list_add_tail(&cmd
->i_conn_node
, &conn
->conn_cmd_list
);
664 spin_unlock_bh(&conn
->cmd_lock
);
667 cmd
->i_state
= ISTATE_SEND_REJECT
;
668 iscsit_add_cmd_to_response_queue(cmd
, conn
, cmd
->i_state
);
670 ret
= wait_for_completion_interruptible(&cmd
->reject_comp
);
674 return (!fail_conn
) ? 0 : -1;
678 * Map some portion of the allocated scatterlist to an iovec, suitable for
679 * kernel sockets to copy data in/out.
681 static int iscsit_map_iovec(
682 struct iscsi_cmd
*cmd
,
688 struct scatterlist
*sg
;
689 unsigned int page_off
;
692 * We know each entry in t_data_sg contains a page.
694 sg
= &cmd
->se_cmd
.t_data_sg
[data_offset
/ PAGE_SIZE
];
695 page_off
= (data_offset
% PAGE_SIZE
);
697 cmd
->first_data_sg
= sg
;
698 cmd
->first_data_sg_off
= page_off
;
700 while (data_length
) {
701 u32 cur_len
= min_t(u32
, data_length
, sg
->length
- page_off
);
703 iov
[i
].iov_base
= kmap(sg_page(sg
)) + sg
->offset
+ page_off
;
704 iov
[i
].iov_len
= cur_len
;
706 data_length
-= cur_len
;
712 cmd
->kmapped_nents
= i
;
717 static void iscsit_unmap_iovec(struct iscsi_cmd
*cmd
)
720 struct scatterlist
*sg
;
722 sg
= cmd
->first_data_sg
;
724 for (i
= 0; i
< cmd
->kmapped_nents
; i
++)
725 kunmap(sg_page(&sg
[i
]));
728 static void iscsit_ack_from_expstatsn(struct iscsi_conn
*conn
, u32 exp_statsn
)
730 struct iscsi_cmd
*cmd
;
732 conn
->exp_statsn
= exp_statsn
;
734 spin_lock_bh(&conn
->cmd_lock
);
735 list_for_each_entry(cmd
, &conn
->conn_cmd_list
, i_conn_node
) {
736 spin_lock(&cmd
->istate_lock
);
737 if ((cmd
->i_state
== ISTATE_SENT_STATUS
) &&
738 (cmd
->stat_sn
< exp_statsn
)) {
739 cmd
->i_state
= ISTATE_REMOVE
;
740 spin_unlock(&cmd
->istate_lock
);
741 iscsit_add_cmd_to_immediate_queue(cmd
, conn
,
745 spin_unlock(&cmd
->istate_lock
);
747 spin_unlock_bh(&conn
->cmd_lock
);
750 static int iscsit_allocate_iovecs(struct iscsi_cmd
*cmd
)
752 u32 iov_count
= max(1UL, DIV_ROUND_UP(cmd
->se_cmd
.data_length
, PAGE_SIZE
));
754 iov_count
+= ISCSI_IOV_DATA_BUFFER
;
756 cmd
->iov_data
= kzalloc(iov_count
* sizeof(struct kvec
), GFP_KERNEL
);
757 if (!cmd
->iov_data
) {
758 pr_err("Unable to allocate cmd->iov_data\n");
762 cmd
->orig_iov_data_count
= iov_count
;
766 static int iscsit_handle_scsi_cmd(
767 struct iscsi_conn
*conn
,
770 int data_direction
, cmdsn_ret
= 0, immed_ret
, ret
, transport_ret
;
771 int dump_immediate_data
= 0, send_check_condition
= 0, payload_length
;
772 struct iscsi_cmd
*cmd
= NULL
;
773 struct iscsi_scsi_req
*hdr
;
777 spin_lock_bh(&conn
->sess
->session_stats_lock
);
778 conn
->sess
->cmd_pdus
++;
779 if (conn
->sess
->se_sess
->se_node_acl
) {
780 spin_lock(&conn
->sess
->se_sess
->se_node_acl
->stats_lock
);
781 conn
->sess
->se_sess
->se_node_acl
->num_cmds
++;
782 spin_unlock(&conn
->sess
->se_sess
->se_node_acl
->stats_lock
);
784 spin_unlock_bh(&conn
->sess
->session_stats_lock
);
786 hdr
= (struct iscsi_scsi_req
*) buf
;
787 payload_length
= ntoh24(hdr
->dlength
);
789 /* FIXME; Add checks for AdditionalHeaderSegment */
791 if (!(hdr
->flags
& ISCSI_FLAG_CMD_WRITE
) &&
792 !(hdr
->flags
& ISCSI_FLAG_CMD_FINAL
)) {
793 pr_err("ISCSI_FLAG_CMD_WRITE & ISCSI_FLAG_CMD_FINAL"
794 " not set. Bad iSCSI Initiator.\n");
795 return iscsit_add_reject(ISCSI_REASON_BOOKMARK_INVALID
, 1,
799 if (((hdr
->flags
& ISCSI_FLAG_CMD_READ
) ||
800 (hdr
->flags
& ISCSI_FLAG_CMD_WRITE
)) && !hdr
->data_length
) {
802 * Vmware ESX v3.0 uses a modified Cisco Initiator (v3.4.2)
803 * that adds support for RESERVE/RELEASE. There is a bug
804 * add with this new functionality that sets R/W bits when
805 * neither CDB carries any READ or WRITE datapayloads.
807 if ((hdr
->cdb
[0] == 0x16) || (hdr
->cdb
[0] == 0x17)) {
808 hdr
->flags
&= ~ISCSI_FLAG_CMD_READ
;
809 hdr
->flags
&= ~ISCSI_FLAG_CMD_WRITE
;
813 pr_err("ISCSI_FLAG_CMD_READ or ISCSI_FLAG_CMD_WRITE"
814 " set when Expected Data Transfer Length is 0 for"
815 " CDB: 0x%02x. Bad iSCSI Initiator.\n", hdr
->cdb
[0]);
816 return iscsit_add_reject(ISCSI_REASON_BOOKMARK_INVALID
, 1,
821 if (!(hdr
->flags
& ISCSI_FLAG_CMD_READ
) &&
822 !(hdr
->flags
& ISCSI_FLAG_CMD_WRITE
) && (hdr
->data_length
!= 0)) {
823 pr_err("ISCSI_FLAG_CMD_READ and/or ISCSI_FLAG_CMD_WRITE"
824 " MUST be set if Expected Data Transfer Length is not 0."
825 " Bad iSCSI Initiator\n");
826 return iscsit_add_reject(ISCSI_REASON_BOOKMARK_INVALID
, 1,
830 if ((hdr
->flags
& ISCSI_FLAG_CMD_READ
) &&
831 (hdr
->flags
& ISCSI_FLAG_CMD_WRITE
)) {
832 pr_err("Bidirectional operations not supported!\n");
833 return iscsit_add_reject(ISCSI_REASON_BOOKMARK_INVALID
, 1,
837 if (hdr
->opcode
& ISCSI_OP_IMMEDIATE
) {
838 pr_err("Illegally set Immediate Bit in iSCSI Initiator"
839 " Scsi Command PDU.\n");
840 return iscsit_add_reject(ISCSI_REASON_BOOKMARK_INVALID
, 1,
844 if (payload_length
&& !conn
->sess
->sess_ops
->ImmediateData
) {
845 pr_err("ImmediateData=No but DataSegmentLength=%u,"
846 " protocol error.\n", payload_length
);
847 return iscsit_add_reject(ISCSI_REASON_PROTOCOL_ERROR
, 1,
851 if ((be32_to_cpu(hdr
->data_length
)== payload_length
) &&
852 (!(hdr
->flags
& ISCSI_FLAG_CMD_FINAL
))) {
853 pr_err("Expected Data Transfer Length and Length of"
854 " Immediate Data are the same, but ISCSI_FLAG_CMD_FINAL"
855 " bit is not set protocol error\n");
856 return iscsit_add_reject(ISCSI_REASON_PROTOCOL_ERROR
, 1,
860 if (payload_length
> be32_to_cpu(hdr
->data_length
)) {
861 pr_err("DataSegmentLength: %u is greater than"
862 " EDTL: %u, protocol error.\n", payload_length
,
864 return iscsit_add_reject(ISCSI_REASON_PROTOCOL_ERROR
, 1,
868 if (payload_length
> conn
->conn_ops
->MaxXmitDataSegmentLength
) {
869 pr_err("DataSegmentLength: %u is greater than"
870 " MaxXmitDataSegmentLength: %u, protocol error.\n",
871 payload_length
, conn
->conn_ops
->MaxXmitDataSegmentLength
);
872 return iscsit_add_reject(ISCSI_REASON_PROTOCOL_ERROR
, 1,
876 if (payload_length
> conn
->sess
->sess_ops
->FirstBurstLength
) {
877 pr_err("DataSegmentLength: %u is greater than"
878 " FirstBurstLength: %u, protocol error.\n",
879 payload_length
, conn
->sess
->sess_ops
->FirstBurstLength
);
880 return iscsit_add_reject(ISCSI_REASON_BOOKMARK_INVALID
, 1,
884 data_direction
= (hdr
->flags
& ISCSI_FLAG_CMD_WRITE
) ? DMA_TO_DEVICE
:
885 (hdr
->flags
& ISCSI_FLAG_CMD_READ
) ? DMA_FROM_DEVICE
:
888 cmd
= iscsit_allocate_cmd(conn
, GFP_KERNEL
);
890 return iscsit_add_reject(ISCSI_REASON_BOOKMARK_NO_RESOURCES
, 1,
893 cmd
->data_direction
= data_direction
;
894 iscsi_task_attr
= hdr
->flags
& ISCSI_FLAG_CMD_ATTR_MASK
;
896 * Figure out the SAM Task Attribute for the incoming SCSI CDB
898 if ((iscsi_task_attr
== ISCSI_ATTR_UNTAGGED
) ||
899 (iscsi_task_attr
== ISCSI_ATTR_SIMPLE
))
900 sam_task_attr
= MSG_SIMPLE_TAG
;
901 else if (iscsi_task_attr
== ISCSI_ATTR_ORDERED
)
902 sam_task_attr
= MSG_ORDERED_TAG
;
903 else if (iscsi_task_attr
== ISCSI_ATTR_HEAD_OF_QUEUE
)
904 sam_task_attr
= MSG_HEAD_TAG
;
905 else if (iscsi_task_attr
== ISCSI_ATTR_ACA
)
906 sam_task_attr
= MSG_ACA_TAG
;
908 pr_debug("Unknown iSCSI Task Attribute: 0x%02x, using"
909 " MSG_SIMPLE_TAG\n", iscsi_task_attr
);
910 sam_task_attr
= MSG_SIMPLE_TAG
;
913 cmd
->iscsi_opcode
= ISCSI_OP_SCSI_CMD
;
914 cmd
->i_state
= ISTATE_NEW_CMD
;
915 cmd
->immediate_cmd
= ((hdr
->opcode
& ISCSI_OP_IMMEDIATE
) ? 1 : 0);
916 cmd
->immediate_data
= (payload_length
) ? 1 : 0;
917 cmd
->unsolicited_data
= ((!(hdr
->flags
& ISCSI_FLAG_CMD_FINAL
) &&
918 (hdr
->flags
& ISCSI_FLAG_CMD_WRITE
)) ? 1 : 0);
919 if (cmd
->unsolicited_data
)
920 cmd
->cmd_flags
|= ICF_NON_IMMEDIATE_UNSOLICITED_DATA
;
922 conn
->sess
->init_task_tag
= cmd
->init_task_tag
= hdr
->itt
;
923 if (hdr
->flags
& ISCSI_FLAG_CMD_READ
) {
924 spin_lock_bh(&conn
->sess
->ttt_lock
);
925 cmd
->targ_xfer_tag
= conn
->sess
->targ_xfer_tag
++;
926 if (cmd
->targ_xfer_tag
== 0xFFFFFFFF)
927 cmd
->targ_xfer_tag
= conn
->sess
->targ_xfer_tag
++;
928 spin_unlock_bh(&conn
->sess
->ttt_lock
);
929 } else if (hdr
->flags
& ISCSI_FLAG_CMD_WRITE
)
930 cmd
->targ_xfer_tag
= 0xFFFFFFFF;
931 cmd
->cmd_sn
= be32_to_cpu(hdr
->cmdsn
);
932 cmd
->exp_stat_sn
= be32_to_cpu(hdr
->exp_statsn
);
933 cmd
->first_burst_len
= payload_length
;
935 if (cmd
->data_direction
== DMA_FROM_DEVICE
) {
936 struct iscsi_datain_req
*dr
;
938 dr
= iscsit_allocate_datain_req();
940 return iscsit_add_reject_from_cmd(
941 ISCSI_REASON_BOOKMARK_NO_RESOURCES
,
944 iscsit_attach_datain_req(cmd
, dr
);
948 * Initialize struct se_cmd descriptor from target_core_mod infrastructure
950 transport_init_se_cmd(&cmd
->se_cmd
, &lio_target_fabric_configfs
->tf_ops
,
951 conn
->sess
->se_sess
, be32_to_cpu(hdr
->data_length
),
952 cmd
->data_direction
, sam_task_attr
,
953 cmd
->sense_buffer
+ 2);
955 pr_debug("Got SCSI Command, ITT: 0x%08x, CmdSN: 0x%08x,"
956 " ExpXferLen: %u, Length: %u, CID: %hu\n", hdr
->itt
,
957 hdr
->cmdsn
, hdr
->data_length
, payload_length
, conn
->cid
);
960 * The CDB is going to an se_device_t.
962 ret
= transport_lookup_cmd_lun(&cmd
->se_cmd
,
963 scsilun_to_int(&hdr
->lun
));
965 if (cmd
->se_cmd
.scsi_sense_reason
== TCM_NON_EXISTENT_LUN
) {
966 pr_debug("Responding to non-acl'ed,"
967 " non-existent or non-exported iSCSI LUN:"
968 " 0x%016Lx\n", get_unaligned_le64(&hdr
->lun
));
970 send_check_condition
= 1;
974 transport_ret
= target_setup_cmd_from_cdb(&cmd
->se_cmd
, hdr
->cdb
);
975 if (transport_ret
== -ENOMEM
) {
976 return iscsit_add_reject_from_cmd(
977 ISCSI_REASON_BOOKMARK_NO_RESOURCES
,
979 } else if (transport_ret
< 0) {
981 * Unsupported SAM Opcode. CHECK_CONDITION will be sent
982 * in iscsit_execute_cmd() during the CmdSN OOO Execution
985 send_check_condition
= 1;
987 if (iscsit_build_pdu_and_seq_lists(cmd
, payload_length
) < 0)
988 return iscsit_add_reject_from_cmd(
989 ISCSI_REASON_BOOKMARK_NO_RESOURCES
,
994 spin_lock_bh(&conn
->cmd_lock
);
995 list_add_tail(&cmd
->i_conn_node
, &conn
->conn_cmd_list
);
996 spin_unlock_bh(&conn
->cmd_lock
);
998 * Check if we need to delay processing because of ALUA
999 * Active/NonOptimized primary access state..
1001 core_alua_check_nonop_delay(&cmd
->se_cmd
);
1003 ret
= iscsit_allocate_iovecs(cmd
);
1005 return iscsit_add_reject_from_cmd(
1006 ISCSI_REASON_BOOKMARK_NO_RESOURCES
,
1009 * Check the CmdSN against ExpCmdSN/MaxCmdSN here if
1010 * the Immediate Bit is not set, and no Immediate
1013 * A PDU/CmdSN carrying Immediate Data can only
1014 * be processed after the DataCRC has passed.
1015 * If the DataCRC fails, the CmdSN MUST NOT
1016 * be acknowledged. (See below)
1018 if (!cmd
->immediate_data
) {
1019 cmdsn_ret
= iscsit_sequence_cmd(conn
, cmd
, hdr
->cmdsn
);
1020 if (cmdsn_ret
== CMDSN_LOWER_THAN_EXP
)
1022 else if (cmdsn_ret
== CMDSN_ERROR_CANNOT_RECOVER
)
1023 return iscsit_add_reject_from_cmd(
1024 ISCSI_REASON_PROTOCOL_ERROR
,
1028 iscsit_ack_from_expstatsn(conn
, be32_to_cpu(hdr
->exp_statsn
));
1031 * If no Immediate Data is attached, it's OK to return now.
1033 if (!cmd
->immediate_data
) {
1034 if (send_check_condition
)
1037 if (cmd
->unsolicited_data
) {
1038 iscsit_set_dataout_sequence_values(cmd
);
1040 spin_lock_bh(&cmd
->dataout_timeout_lock
);
1041 iscsit_start_dataout_timer(cmd
, cmd
->conn
);
1042 spin_unlock_bh(&cmd
->dataout_timeout_lock
);
1049 * Early CHECK_CONDITIONs never make it to the transport processing
1050 * thread. They are processed in CmdSN order by
1051 * iscsit_check_received_cmdsn() below.
1053 if (send_check_condition
) {
1054 immed_ret
= IMMEDIATE_DATA_NORMAL_OPERATION
;
1055 dump_immediate_data
= 1;
1056 goto after_immediate_data
;
1059 * Call directly into transport_generic_new_cmd() to perform
1060 * the backend memory allocation.
1062 ret
= transport_generic_new_cmd(&cmd
->se_cmd
);
1064 immed_ret
= IMMEDIATE_DATA_NORMAL_OPERATION
;
1065 dump_immediate_data
= 1;
1066 goto after_immediate_data
;
1069 immed_ret
= iscsit_handle_immediate_data(cmd
, buf
, payload_length
);
1070 after_immediate_data
:
1071 if (immed_ret
== IMMEDIATE_DATA_NORMAL_OPERATION
) {
1073 * A PDU/CmdSN carrying Immediate Data passed
1074 * DataCRC, check against ExpCmdSN/MaxCmdSN if
1075 * Immediate Bit is not set.
1077 cmdsn_ret
= iscsit_sequence_cmd(conn
, cmd
, hdr
->cmdsn
);
1079 * Special case for Unsupported SAM WRITE Opcodes
1080 * and ImmediateData=Yes.
1082 if (dump_immediate_data
) {
1083 if (iscsit_dump_data_payload(conn
, payload_length
, 1) < 0)
1085 } else if (cmd
->unsolicited_data
) {
1086 iscsit_set_dataout_sequence_values(cmd
);
1088 spin_lock_bh(&cmd
->dataout_timeout_lock
);
1089 iscsit_start_dataout_timer(cmd
, cmd
->conn
);
1090 spin_unlock_bh(&cmd
->dataout_timeout_lock
);
1093 if (cmdsn_ret
== CMDSN_ERROR_CANNOT_RECOVER
)
1094 return iscsit_add_reject_from_cmd(
1095 ISCSI_REASON_PROTOCOL_ERROR
,
1098 } else if (immed_ret
== IMMEDIATE_DATA_ERL1_CRC_FAILURE
) {
1100 * Immediate Data failed DataCRC and ERL>=1,
1101 * silently drop this PDU and let the initiator
1102 * plug the CmdSN gap.
1104 * FIXME: Send Unsolicited NOPIN with reserved
1105 * TTT here to help the initiator figure out
1106 * the missing CmdSN, although they should be
1107 * intelligent enough to determine the missing
1108 * CmdSN and issue a retry to plug the sequence.
1110 cmd
->i_state
= ISTATE_REMOVE
;
1111 iscsit_add_cmd_to_immediate_queue(cmd
, conn
, cmd
->i_state
);
1112 } else /* immed_ret == IMMEDIATE_DATA_CANNOT_RECOVER */
1118 static u32
iscsit_do_crypto_hash_sg(
1119 struct hash_desc
*hash
,
1120 struct iscsi_cmd
*cmd
,
1128 struct scatterlist
*sg
;
1129 unsigned int page_off
;
1131 crypto_hash_init(hash
);
1133 sg
= cmd
->first_data_sg
;
1134 page_off
= cmd
->first_data_sg_off
;
1137 while (data_length
) {
1138 u32 cur_len
= min_t(u32
, data_length
, (sg
[i
].length
- page_off
));
1140 crypto_hash_update(hash
, &sg
[i
], cur_len
);
1142 data_length
-= cur_len
;
1148 struct scatterlist pad_sg
;
1150 sg_init_one(&pad_sg
, pad_bytes
, padding
);
1151 crypto_hash_update(hash
, &pad_sg
, padding
);
1153 crypto_hash_final(hash
, (u8
*) &data_crc
);
1158 static void iscsit_do_crypto_hash_buf(
1159 struct hash_desc
*hash
,
1166 struct scatterlist sg
;
1168 crypto_hash_init(hash
);
1170 sg_init_one(&sg
, buf
, payload_length
);
1171 crypto_hash_update(hash
, &sg
, payload_length
);
1174 sg_init_one(&sg
, pad_bytes
, padding
);
1175 crypto_hash_update(hash
, &sg
, padding
);
1177 crypto_hash_final(hash
, data_crc
);
1180 static int iscsit_handle_data_out(struct iscsi_conn
*conn
, unsigned char *buf
)
1182 int iov_ret
, ooo_cmdsn
= 0, ret
;
1183 u8 data_crc_failed
= 0;
1184 u32 checksum
, iov_count
= 0, padding
= 0, rx_got
= 0;
1185 u32 rx_size
= 0, payload_length
;
1186 struct iscsi_cmd
*cmd
= NULL
;
1187 struct se_cmd
*se_cmd
;
1188 struct iscsi_data
*hdr
;
1190 unsigned long flags
;
1192 hdr
= (struct iscsi_data
*) buf
;
1193 payload_length
= ntoh24(hdr
->dlength
);
1195 if (!payload_length
) {
1196 pr_err("DataOUT payload is ZERO, protocol error.\n");
1197 return iscsit_add_reject(ISCSI_REASON_PROTOCOL_ERROR
, 1,
1202 spin_lock_bh(&conn
->sess
->session_stats_lock
);
1203 conn
->sess
->rx_data_octets
+= payload_length
;
1204 if (conn
->sess
->se_sess
->se_node_acl
) {
1205 spin_lock(&conn
->sess
->se_sess
->se_node_acl
->stats_lock
);
1206 conn
->sess
->se_sess
->se_node_acl
->write_bytes
+= payload_length
;
1207 spin_unlock(&conn
->sess
->se_sess
->se_node_acl
->stats_lock
);
1209 spin_unlock_bh(&conn
->sess
->session_stats_lock
);
1211 if (payload_length
> conn
->conn_ops
->MaxXmitDataSegmentLength
) {
1212 pr_err("DataSegmentLength: %u is greater than"
1213 " MaxXmitDataSegmentLength: %u\n", payload_length
,
1214 conn
->conn_ops
->MaxXmitDataSegmentLength
);
1215 return iscsit_add_reject(ISCSI_REASON_PROTOCOL_ERROR
, 1,
1219 cmd
= iscsit_find_cmd_from_itt_or_dump(conn
, hdr
->itt
,
1224 pr_debug("Got DataOut ITT: 0x%08x, TTT: 0x%08x,"
1225 " DataSN: 0x%08x, Offset: %u, Length: %u, CID: %hu\n",
1226 hdr
->itt
, hdr
->ttt
, hdr
->datasn
, hdr
->offset
,
1227 payload_length
, conn
->cid
);
1229 if (cmd
->cmd_flags
& ICF_GOT_LAST_DATAOUT
) {
1230 pr_err("Command ITT: 0x%08x received DataOUT after"
1231 " last DataOUT received, dumping payload\n",
1232 cmd
->init_task_tag
);
1233 return iscsit_dump_data_payload(conn
, payload_length
, 1);
1236 if (cmd
->data_direction
!= DMA_TO_DEVICE
) {
1237 pr_err("Command ITT: 0x%08x received DataOUT for a"
1238 " NON-WRITE command.\n", cmd
->init_task_tag
);
1239 return iscsit_add_reject_from_cmd(ISCSI_REASON_PROTOCOL_ERROR
,
1242 se_cmd
= &cmd
->se_cmd
;
1243 iscsit_mod_dataout_timer(cmd
);
1245 if ((be32_to_cpu(hdr
->offset
) + payload_length
) > cmd
->se_cmd
.data_length
) {
1246 pr_err("DataOut Offset: %u, Length %u greater than"
1247 " iSCSI Command EDTL %u, protocol error.\n",
1248 hdr
->offset
, payload_length
, cmd
->se_cmd
.data_length
);
1249 return iscsit_add_reject_from_cmd(ISCSI_REASON_BOOKMARK_INVALID
,
1253 if (cmd
->unsolicited_data
) {
1254 int dump_unsolicited_data
= 0;
1256 if (conn
->sess
->sess_ops
->InitialR2T
) {
1257 pr_err("Received unexpected unsolicited data"
1258 " while InitialR2T=Yes, protocol error.\n");
1259 transport_send_check_condition_and_sense(&cmd
->se_cmd
,
1260 TCM_UNEXPECTED_UNSOLICITED_DATA
, 0);
1264 * Special case for dealing with Unsolicited DataOUT
1265 * and Unsupported SAM WRITE Opcodes and SE resource allocation
1269 /* Something's amiss if we're not in WRITE_PENDING state... */
1270 spin_lock_irqsave(&se_cmd
->t_state_lock
, flags
);
1271 WARN_ON(se_cmd
->t_state
!= TRANSPORT_WRITE_PENDING
);
1272 spin_unlock_irqrestore(&se_cmd
->t_state_lock
, flags
);
1274 spin_lock_irqsave(&se_cmd
->t_state_lock
, flags
);
1275 if (!(se_cmd
->se_cmd_flags
& SCF_SUPPORTED_SAM_OPCODE
) ||
1276 (se_cmd
->se_cmd_flags
& SCF_SCSI_CDB_EXCEPTION
))
1277 dump_unsolicited_data
= 1;
1278 spin_unlock_irqrestore(&se_cmd
->t_state_lock
, flags
);
1280 if (dump_unsolicited_data
) {
1282 * Check if a delayed TASK_ABORTED status needs to
1283 * be sent now if the ISCSI_FLAG_CMD_FINAL has been
1284 * received with the unsolicitied data out.
1286 if (hdr
->flags
& ISCSI_FLAG_CMD_FINAL
)
1287 iscsit_stop_dataout_timer(cmd
);
1289 transport_check_aborted_status(se_cmd
,
1290 (hdr
->flags
& ISCSI_FLAG_CMD_FINAL
));
1291 return iscsit_dump_data_payload(conn
, payload_length
, 1);
1295 * For the normal solicited data path:
1297 * Check for a delayed TASK_ABORTED status and dump any
1298 * incoming data out payload if one exists. Also, when the
1299 * ISCSI_FLAG_CMD_FINAL is set to denote the end of the current
1300 * data out sequence, we decrement outstanding_r2ts. Once
1301 * outstanding_r2ts reaches zero, go ahead and send the delayed
1302 * TASK_ABORTED status.
1304 if (se_cmd
->transport_state
& CMD_T_ABORTED
) {
1305 if (hdr
->flags
& ISCSI_FLAG_CMD_FINAL
)
1306 if (--cmd
->outstanding_r2ts
< 1) {
1307 iscsit_stop_dataout_timer(cmd
);
1308 transport_check_aborted_status(
1312 return iscsit_dump_data_payload(conn
, payload_length
, 1);
1316 * Preform DataSN, DataSequenceInOrder, DataPDUInOrder, and
1317 * within-command recovery checks before receiving the payload.
1319 ret
= iscsit_check_pre_dataout(cmd
, buf
);
1320 if (ret
== DATAOUT_WITHIN_COMMAND_RECOVERY
)
1322 else if (ret
== DATAOUT_CANNOT_RECOVER
)
1325 rx_size
+= payload_length
;
1326 iov
= &cmd
->iov_data
[0];
1328 iov_ret
= iscsit_map_iovec(cmd
, iov
, be32_to_cpu(hdr
->offset
),
1333 iov_count
+= iov_ret
;
1335 padding
= ((-payload_length
) & 3);
1337 iov
[iov_count
].iov_base
= cmd
->pad_bytes
;
1338 iov
[iov_count
++].iov_len
= padding
;
1340 pr_debug("Receiving %u padding bytes.\n", padding
);
1343 if (conn
->conn_ops
->DataDigest
) {
1344 iov
[iov_count
].iov_base
= &checksum
;
1345 iov
[iov_count
++].iov_len
= ISCSI_CRC_LEN
;
1346 rx_size
+= ISCSI_CRC_LEN
;
1349 rx_got
= rx_data(conn
, &cmd
->iov_data
[0], iov_count
, rx_size
);
1351 iscsit_unmap_iovec(cmd
);
1353 if (rx_got
!= rx_size
)
1356 if (conn
->conn_ops
->DataDigest
) {
1359 data_crc
= iscsit_do_crypto_hash_sg(&conn
->conn_rx_hash
, cmd
,
1360 be32_to_cpu(hdr
->offset
),
1361 payload_length
, padding
,
1364 if (checksum
!= data_crc
) {
1365 pr_err("ITT: 0x%08x, Offset: %u, Length: %u,"
1366 " DataSN: 0x%08x, CRC32C DataDigest 0x%08x"
1367 " does not match computed 0x%08x\n",
1368 hdr
->itt
, hdr
->offset
, payload_length
,
1369 hdr
->datasn
, checksum
, data_crc
);
1370 data_crc_failed
= 1;
1372 pr_debug("Got CRC32C DataDigest 0x%08x for"
1373 " %u bytes of Data Out\n", checksum
,
1378 * Increment post receive data and CRC values or perform
1379 * within-command recovery.
1381 ret
= iscsit_check_post_dataout(cmd
, buf
, data_crc_failed
);
1382 if ((ret
== DATAOUT_NORMAL
) || (ret
== DATAOUT_WITHIN_COMMAND_RECOVERY
))
1384 else if (ret
== DATAOUT_SEND_R2T
) {
1385 iscsit_set_dataout_sequence_values(cmd
);
1386 iscsit_build_r2ts_for_cmd(cmd
, conn
, false);
1387 } else if (ret
== DATAOUT_SEND_TO_TRANSPORT
) {
1389 * Handle extra special case for out of order
1390 * Unsolicited Data Out.
1392 spin_lock_bh(&cmd
->istate_lock
);
1393 ooo_cmdsn
= (cmd
->cmd_flags
& ICF_OOO_CMDSN
);
1394 cmd
->cmd_flags
|= ICF_GOT_LAST_DATAOUT
;
1395 cmd
->i_state
= ISTATE_RECEIVED_LAST_DATAOUT
;
1396 spin_unlock_bh(&cmd
->istate_lock
);
1398 iscsit_stop_dataout_timer(cmd
);
1401 target_execute_cmd(&cmd
->se_cmd
);
1403 } else /* DATAOUT_CANNOT_RECOVER */
1409 static int iscsit_handle_nop_out(
1410 struct iscsi_conn
*conn
,
1413 unsigned char *ping_data
= NULL
;
1414 int cmdsn_ret
, niov
= 0, ret
= 0, rx_got
, rx_size
;
1415 u32 checksum
, data_crc
, padding
= 0, payload_length
;
1416 struct iscsi_cmd
*cmd
= NULL
;
1417 struct kvec
*iov
= NULL
;
1418 struct iscsi_nopout
*hdr
;
1420 hdr
= (struct iscsi_nopout
*) buf
;
1421 payload_length
= ntoh24(hdr
->dlength
);
1423 if (hdr
->itt
== RESERVED_ITT
&& !(hdr
->opcode
& ISCSI_OP_IMMEDIATE
)) {
1424 pr_err("NOPOUT ITT is reserved, but Immediate Bit is"
1425 " not set, protocol error.\n");
1426 return iscsit_add_reject(ISCSI_REASON_PROTOCOL_ERROR
, 1,
1430 if (payload_length
> conn
->conn_ops
->MaxXmitDataSegmentLength
) {
1431 pr_err("NOPOUT Ping Data DataSegmentLength: %u is"
1432 " greater than MaxXmitDataSegmentLength: %u, protocol"
1433 " error.\n", payload_length
,
1434 conn
->conn_ops
->MaxXmitDataSegmentLength
);
1435 return iscsit_add_reject(ISCSI_REASON_PROTOCOL_ERROR
, 1,
1439 pr_debug("Got NOPOUT Ping %s ITT: 0x%08x, TTT: 0x%09x,"
1440 " CmdSN: 0x%08x, ExpStatSN: 0x%08x, Length: %u\n",
1441 hdr
->itt
== RESERVED_ITT
? "Response" : "Request",
1442 hdr
->itt
, hdr
->ttt
, hdr
->cmdsn
, hdr
->exp_statsn
,
1445 * This is not a response to a Unsolicited NopIN, which means
1446 * it can either be a NOPOUT ping request (with a valid ITT),
1447 * or a NOPOUT not requesting a NOPIN (with a reserved ITT).
1448 * Either way, make sure we allocate an struct iscsi_cmd, as both
1449 * can contain ping data.
1451 if (hdr
->ttt
== cpu_to_be32(0xFFFFFFFF)) {
1452 cmd
= iscsit_allocate_cmd(conn
, GFP_KERNEL
);
1454 return iscsit_add_reject(
1455 ISCSI_REASON_BOOKMARK_NO_RESOURCES
,
1458 cmd
->iscsi_opcode
= ISCSI_OP_NOOP_OUT
;
1459 cmd
->i_state
= ISTATE_SEND_NOPIN
;
1460 cmd
->immediate_cmd
= ((hdr
->opcode
& ISCSI_OP_IMMEDIATE
) ?
1462 conn
->sess
->init_task_tag
= cmd
->init_task_tag
= hdr
->itt
;
1463 cmd
->targ_xfer_tag
= 0xFFFFFFFF;
1464 cmd
->cmd_sn
= be32_to_cpu(hdr
->cmdsn
);
1465 cmd
->exp_stat_sn
= be32_to_cpu(hdr
->exp_statsn
);
1466 cmd
->data_direction
= DMA_NONE
;
1469 if (payload_length
&& hdr
->ttt
== cpu_to_be32(0xFFFFFFFF)) {
1470 rx_size
= payload_length
;
1471 ping_data
= kzalloc(payload_length
+ 1, GFP_KERNEL
);
1473 pr_err("Unable to allocate memory for"
1474 " NOPOUT ping data.\n");
1479 iov
= &cmd
->iov_misc
[0];
1480 iov
[niov
].iov_base
= ping_data
;
1481 iov
[niov
++].iov_len
= payload_length
;
1483 padding
= ((-payload_length
) & 3);
1485 pr_debug("Receiving %u additional bytes"
1486 " for padding.\n", padding
);
1487 iov
[niov
].iov_base
= &cmd
->pad_bytes
;
1488 iov
[niov
++].iov_len
= padding
;
1491 if (conn
->conn_ops
->DataDigest
) {
1492 iov
[niov
].iov_base
= &checksum
;
1493 iov
[niov
++].iov_len
= ISCSI_CRC_LEN
;
1494 rx_size
+= ISCSI_CRC_LEN
;
1497 rx_got
= rx_data(conn
, &cmd
->iov_misc
[0], niov
, rx_size
);
1498 if (rx_got
!= rx_size
) {
1503 if (conn
->conn_ops
->DataDigest
) {
1504 iscsit_do_crypto_hash_buf(&conn
->conn_rx_hash
,
1505 ping_data
, payload_length
,
1506 padding
, cmd
->pad_bytes
,
1509 if (checksum
!= data_crc
) {
1510 pr_err("Ping data CRC32C DataDigest"
1511 " 0x%08x does not match computed 0x%08x\n",
1512 checksum
, data_crc
);
1513 if (!conn
->sess
->sess_ops
->ErrorRecoveryLevel
) {
1514 pr_err("Unable to recover from"
1515 " NOPOUT Ping DataCRC failure while in"
1521 * Silently drop this PDU and let the
1522 * initiator plug the CmdSN gap.
1524 pr_debug("Dropping NOPOUT"
1525 " Command CmdSN: 0x%08x due to"
1526 " DataCRC error.\n", hdr
->cmdsn
);
1531 pr_debug("Got CRC32C DataDigest"
1532 " 0x%08x for %u bytes of ping data.\n",
1533 checksum
, payload_length
);
1537 ping_data
[payload_length
] = '\0';
1539 * Attach ping data to struct iscsi_cmd->buf_ptr.
1541 cmd
->buf_ptr
= ping_data
;
1542 cmd
->buf_ptr_size
= payload_length
;
1544 pr_debug("Got %u bytes of NOPOUT ping"
1545 " data.\n", payload_length
);
1546 pr_debug("Ping Data: \"%s\"\n", ping_data
);
1549 if (hdr
->itt
!= RESERVED_ITT
) {
1551 pr_err("Checking CmdSN for NOPOUT,"
1552 " but cmd is NULL!\n");
1556 * Initiator is expecting a NopIN ping reply,
1558 spin_lock_bh(&conn
->cmd_lock
);
1559 list_add_tail(&cmd
->i_conn_node
, &conn
->conn_cmd_list
);
1560 spin_unlock_bh(&conn
->cmd_lock
);
1562 iscsit_ack_from_expstatsn(conn
, be32_to_cpu(hdr
->exp_statsn
));
1564 if (hdr
->opcode
& ISCSI_OP_IMMEDIATE
) {
1565 iscsit_add_cmd_to_response_queue(cmd
, conn
,
1570 cmdsn_ret
= iscsit_sequence_cmd(conn
, cmd
, hdr
->cmdsn
);
1571 if (cmdsn_ret
== CMDSN_LOWER_THAN_EXP
) {
1575 if (cmdsn_ret
== CMDSN_ERROR_CANNOT_RECOVER
)
1576 return iscsit_add_reject_from_cmd(
1577 ISCSI_REASON_PROTOCOL_ERROR
,
1583 if (hdr
->ttt
!= cpu_to_be32(0xFFFFFFFF)) {
1585 * This was a response to a unsolicited NOPIN ping.
1587 cmd
= iscsit_find_cmd_from_ttt(conn
, be32_to_cpu(hdr
->ttt
));
1591 iscsit_stop_nopin_response_timer(conn
);
1593 cmd
->i_state
= ISTATE_REMOVE
;
1594 iscsit_add_cmd_to_immediate_queue(cmd
, conn
, cmd
->i_state
);
1595 iscsit_start_nopin_timer(conn
);
1598 * Initiator is not expecting a NOPIN is response.
1599 * Just ignore for now.
1601 * iSCSI v19-91 10.18
1602 * "A NOP-OUT may also be used to confirm a changed
1603 * ExpStatSN if another PDU will not be available
1613 iscsit_release_cmd(cmd
);
1619 static int iscsit_handle_task_mgt_cmd(
1620 struct iscsi_conn
*conn
,
1623 struct iscsi_cmd
*cmd
;
1624 struct se_tmr_req
*se_tmr
;
1625 struct iscsi_tmr_req
*tmr_req
;
1626 struct iscsi_tm
*hdr
;
1627 int out_of_order_cmdsn
= 0;
1631 hdr
= (struct iscsi_tm
*) buf
;
1632 hdr
->flags
&= ~ISCSI_FLAG_CMD_FINAL
;
1633 function
= hdr
->flags
;
1635 pr_debug("Got Task Management Request ITT: 0x%08x, CmdSN:"
1636 " 0x%08x, Function: 0x%02x, RefTaskTag: 0x%08x, RefCmdSN:"
1637 " 0x%08x, CID: %hu\n", hdr
->itt
, hdr
->cmdsn
, function
,
1638 hdr
->rtt
, hdr
->refcmdsn
, conn
->cid
);
1640 if ((function
!= ISCSI_TM_FUNC_ABORT_TASK
) &&
1641 ((function
!= ISCSI_TM_FUNC_TASK_REASSIGN
) &&
1642 hdr
->rtt
!= RESERVED_ITT
)) {
1643 pr_err("RefTaskTag should be set to 0xFFFFFFFF.\n");
1644 hdr
->rtt
= RESERVED_ITT
;
1647 if ((function
== ISCSI_TM_FUNC_TASK_REASSIGN
) &&
1648 !(hdr
->opcode
& ISCSI_OP_IMMEDIATE
)) {
1649 pr_err("Task Management Request TASK_REASSIGN not"
1650 " issued as immediate command, bad iSCSI Initiator"
1651 "implementation\n");
1652 return iscsit_add_reject(ISCSI_REASON_PROTOCOL_ERROR
, 1,
1655 if ((function
!= ISCSI_TM_FUNC_ABORT_TASK
) &&
1656 be32_to_cpu(hdr
->refcmdsn
) != ISCSI_RESERVED_TAG
)
1657 hdr
->refcmdsn
= cpu_to_be32(ISCSI_RESERVED_TAG
);
1659 cmd
= iscsit_allocate_cmd(conn
, GFP_KERNEL
);
1661 return iscsit_add_reject(ISCSI_REASON_BOOKMARK_NO_RESOURCES
,
1664 cmd
->data_direction
= DMA_NONE
;
1666 cmd
->tmr_req
= kzalloc(sizeof(struct iscsi_tmr_req
), GFP_KERNEL
);
1667 if (!cmd
->tmr_req
) {
1668 pr_err("Unable to allocate memory for"
1669 " Task Management command!\n");
1670 return iscsit_add_reject_from_cmd(
1671 ISCSI_REASON_BOOKMARK_NO_RESOURCES
,
1676 * TASK_REASSIGN for ERL=2 / connection stays inside of
1677 * LIO-Target $FABRIC_MOD
1679 if (function
!= ISCSI_TM_FUNC_TASK_REASSIGN
) {
1684 transport_init_se_cmd(&cmd
->se_cmd
,
1685 &lio_target_fabric_configfs
->tf_ops
,
1686 conn
->sess
->se_sess
, 0, DMA_NONE
,
1687 MSG_SIMPLE_TAG
, cmd
->sense_buffer
+ 2);
1690 case ISCSI_TM_FUNC_ABORT_TASK
:
1691 tcm_function
= TMR_ABORT_TASK
;
1693 case ISCSI_TM_FUNC_ABORT_TASK_SET
:
1694 tcm_function
= TMR_ABORT_TASK_SET
;
1696 case ISCSI_TM_FUNC_CLEAR_ACA
:
1697 tcm_function
= TMR_CLEAR_ACA
;
1699 case ISCSI_TM_FUNC_CLEAR_TASK_SET
:
1700 tcm_function
= TMR_CLEAR_TASK_SET
;
1702 case ISCSI_TM_FUNC_LOGICAL_UNIT_RESET
:
1703 tcm_function
= TMR_LUN_RESET
;
1705 case ISCSI_TM_FUNC_TARGET_WARM_RESET
:
1706 tcm_function
= TMR_TARGET_WARM_RESET
;
1708 case ISCSI_TM_FUNC_TARGET_COLD_RESET
:
1709 tcm_function
= TMR_TARGET_COLD_RESET
;
1712 pr_err("Unknown iSCSI TMR Function:"
1713 " 0x%02x\n", function
);
1714 return iscsit_add_reject_from_cmd(
1715 ISCSI_REASON_BOOKMARK_NO_RESOURCES
,
1719 ret
= core_tmr_alloc_req(&cmd
->se_cmd
, cmd
->tmr_req
,
1720 tcm_function
, GFP_KERNEL
);
1722 return iscsit_add_reject_from_cmd(
1723 ISCSI_REASON_BOOKMARK_NO_RESOURCES
,
1726 cmd
->tmr_req
->se_tmr_req
= cmd
->se_cmd
.se_tmr_req
;
1729 cmd
->iscsi_opcode
= ISCSI_OP_SCSI_TMFUNC
;
1730 cmd
->i_state
= ISTATE_SEND_TASKMGTRSP
;
1731 cmd
->immediate_cmd
= ((hdr
->opcode
& ISCSI_OP_IMMEDIATE
) ? 1 : 0);
1732 cmd
->init_task_tag
= hdr
->itt
;
1733 cmd
->targ_xfer_tag
= 0xFFFFFFFF;
1734 cmd
->cmd_sn
= be32_to_cpu(hdr
->cmdsn
);
1735 cmd
->exp_stat_sn
= be32_to_cpu(hdr
->exp_statsn
);
1736 se_tmr
= cmd
->se_cmd
.se_tmr_req
;
1737 tmr_req
= cmd
->tmr_req
;
1739 * Locate the struct se_lun for all TMRs not related to ERL=2 TASK_REASSIGN
1741 if (function
!= ISCSI_TM_FUNC_TASK_REASSIGN
) {
1742 ret
= transport_lookup_tmr_lun(&cmd
->se_cmd
,
1743 scsilun_to_int(&hdr
->lun
));
1745 cmd
->se_cmd
.se_cmd_flags
|= SCF_SCSI_CDB_EXCEPTION
;
1746 se_tmr
->response
= ISCSI_TMF_RSP_NO_LUN
;
1752 case ISCSI_TM_FUNC_ABORT_TASK
:
1753 se_tmr
->response
= iscsit_tmr_abort_task(cmd
, buf
);
1754 if (se_tmr
->response
!= ISCSI_TMF_RSP_COMPLETE
) {
1755 cmd
->se_cmd
.se_cmd_flags
|= SCF_SCSI_CDB_EXCEPTION
;
1759 case ISCSI_TM_FUNC_ABORT_TASK_SET
:
1760 case ISCSI_TM_FUNC_CLEAR_ACA
:
1761 case ISCSI_TM_FUNC_CLEAR_TASK_SET
:
1762 case ISCSI_TM_FUNC_LOGICAL_UNIT_RESET
:
1764 case ISCSI_TM_FUNC_TARGET_WARM_RESET
:
1765 if (iscsit_tmr_task_warm_reset(conn
, tmr_req
, buf
) < 0) {
1766 cmd
->se_cmd
.se_cmd_flags
|= SCF_SCSI_CDB_EXCEPTION
;
1767 se_tmr
->response
= ISCSI_TMF_RSP_AUTH_FAILED
;
1771 case ISCSI_TM_FUNC_TARGET_COLD_RESET
:
1772 if (iscsit_tmr_task_cold_reset(conn
, tmr_req
, buf
) < 0) {
1773 cmd
->se_cmd
.se_cmd_flags
|= SCF_SCSI_CDB_EXCEPTION
;
1774 se_tmr
->response
= ISCSI_TMF_RSP_AUTH_FAILED
;
1778 case ISCSI_TM_FUNC_TASK_REASSIGN
:
1779 se_tmr
->response
= iscsit_tmr_task_reassign(cmd
, buf
);
1781 * Perform sanity checks on the ExpDataSN only if the
1782 * TASK_REASSIGN was successful.
1784 if (se_tmr
->response
!= ISCSI_TMF_RSP_COMPLETE
)
1787 if (iscsit_check_task_reassign_expdatasn(tmr_req
, conn
) < 0)
1788 return iscsit_add_reject_from_cmd(
1789 ISCSI_REASON_BOOKMARK_INVALID
, 1, 1,
1793 pr_err("Unknown TMR function: 0x%02x, protocol"
1794 " error.\n", function
);
1795 cmd
->se_cmd
.se_cmd_flags
|= SCF_SCSI_CDB_EXCEPTION
;
1796 se_tmr
->response
= ISCSI_TMF_RSP_NOT_SUPPORTED
;
1800 if ((function
!= ISCSI_TM_FUNC_TASK_REASSIGN
) &&
1801 (se_tmr
->response
== ISCSI_TMF_RSP_COMPLETE
))
1802 se_tmr
->call_transport
= 1;
1804 spin_lock_bh(&conn
->cmd_lock
);
1805 list_add_tail(&cmd
->i_conn_node
, &conn
->conn_cmd_list
);
1806 spin_unlock_bh(&conn
->cmd_lock
);
1808 if (!(hdr
->opcode
& ISCSI_OP_IMMEDIATE
)) {
1809 int cmdsn_ret
= iscsit_sequence_cmd(conn
, cmd
, hdr
->cmdsn
);
1810 if (cmdsn_ret
== CMDSN_HIGHER_THAN_EXP
)
1811 out_of_order_cmdsn
= 1;
1812 else if (cmdsn_ret
== CMDSN_LOWER_THAN_EXP
)
1814 else if (cmdsn_ret
== CMDSN_ERROR_CANNOT_RECOVER
)
1815 return iscsit_add_reject_from_cmd(
1816 ISCSI_REASON_PROTOCOL_ERROR
,
1819 iscsit_ack_from_expstatsn(conn
, be32_to_cpu(hdr
->exp_statsn
));
1821 if (out_of_order_cmdsn
|| !(hdr
->opcode
& ISCSI_OP_IMMEDIATE
))
1824 * Found the referenced task, send to transport for processing.
1826 if (se_tmr
->call_transport
)
1827 return transport_generic_handle_tmr(&cmd
->se_cmd
);
1830 * Could not find the referenced LUN, task, or Task Management
1831 * command not authorized or supported. Change state and
1832 * let the tx_thread send the response.
1834 * For connection recovery, this is also the default action for
1835 * TMR TASK_REASSIGN.
1837 iscsit_add_cmd_to_response_queue(cmd
, conn
, cmd
->i_state
);
1841 /* #warning FIXME: Support Text Command parameters besides SendTargets */
1842 static int iscsit_handle_text_cmd(
1843 struct iscsi_conn
*conn
,
1846 char *text_ptr
, *text_in
;
1847 int cmdsn_ret
, niov
= 0, rx_got
, rx_size
;
1848 u32 checksum
= 0, data_crc
= 0, payload_length
;
1849 u32 padding
= 0, pad_bytes
= 0, text_length
= 0;
1850 struct iscsi_cmd
*cmd
;
1852 struct iscsi_text
*hdr
;
1854 hdr
= (struct iscsi_text
*) buf
;
1855 payload_length
= ntoh24(hdr
->dlength
);
1857 if (payload_length
> conn
->conn_ops
->MaxXmitDataSegmentLength
) {
1858 pr_err("Unable to accept text parameter length: %u"
1859 "greater than MaxXmitDataSegmentLength %u.\n",
1860 payload_length
, conn
->conn_ops
->MaxXmitDataSegmentLength
);
1861 return iscsit_add_reject(ISCSI_REASON_PROTOCOL_ERROR
, 1,
1865 pr_debug("Got Text Request: ITT: 0x%08x, CmdSN: 0x%08x,"
1866 " ExpStatSN: 0x%08x, Length: %u\n", hdr
->itt
, hdr
->cmdsn
,
1867 hdr
->exp_statsn
, payload_length
);
1869 rx_size
= text_length
= payload_length
;
1871 text_in
= kzalloc(text_length
, GFP_KERNEL
);
1873 pr_err("Unable to allocate memory for"
1874 " incoming text parameters\n");
1878 memset(iov
, 0, 3 * sizeof(struct kvec
));
1879 iov
[niov
].iov_base
= text_in
;
1880 iov
[niov
++].iov_len
= text_length
;
1882 padding
= ((-payload_length
) & 3);
1884 iov
[niov
].iov_base
= &pad_bytes
;
1885 iov
[niov
++].iov_len
= padding
;
1887 pr_debug("Receiving %u additional bytes"
1888 " for padding.\n", padding
);
1890 if (conn
->conn_ops
->DataDigest
) {
1891 iov
[niov
].iov_base
= &checksum
;
1892 iov
[niov
++].iov_len
= ISCSI_CRC_LEN
;
1893 rx_size
+= ISCSI_CRC_LEN
;
1896 rx_got
= rx_data(conn
, &iov
[0], niov
, rx_size
);
1897 if (rx_got
!= rx_size
) {
1902 if (conn
->conn_ops
->DataDigest
) {
1903 iscsit_do_crypto_hash_buf(&conn
->conn_rx_hash
,
1904 text_in
, text_length
,
1905 padding
, (u8
*)&pad_bytes
,
1908 if (checksum
!= data_crc
) {
1909 pr_err("Text data CRC32C DataDigest"
1910 " 0x%08x does not match computed"
1911 " 0x%08x\n", checksum
, data_crc
);
1912 if (!conn
->sess
->sess_ops
->ErrorRecoveryLevel
) {
1913 pr_err("Unable to recover from"
1914 " Text Data digest failure while in"
1920 * Silently drop this PDU and let the
1921 * initiator plug the CmdSN gap.
1923 pr_debug("Dropping Text"
1924 " Command CmdSN: 0x%08x due to"
1925 " DataCRC error.\n", hdr
->cmdsn
);
1930 pr_debug("Got CRC32C DataDigest"
1931 " 0x%08x for %u bytes of text data.\n",
1932 checksum
, text_length
);
1935 text_in
[text_length
- 1] = '\0';
1936 pr_debug("Successfully read %d bytes of text"
1937 " data.\n", text_length
);
1939 if (strncmp("SendTargets", text_in
, 11) != 0) {
1940 pr_err("Received Text Data that is not"
1941 " SendTargets, cannot continue.\n");
1945 text_ptr
= strchr(text_in
, '=');
1947 pr_err("No \"=\" separator found in Text Data,"
1948 " cannot continue.\n");
1952 if (strncmp("=All", text_ptr
, 4) != 0) {
1953 pr_err("Unable to locate All value for"
1954 " SendTargets key, cannot continue.\n");
1958 /*#warning Support SendTargets=(iSCSI Target Name/Nothing) values. */
1962 cmd
= iscsit_allocate_cmd(conn
, GFP_KERNEL
);
1964 return iscsit_add_reject(ISCSI_REASON_BOOKMARK_NO_RESOURCES
,
1967 cmd
->iscsi_opcode
= ISCSI_OP_TEXT
;
1968 cmd
->i_state
= ISTATE_SEND_TEXTRSP
;
1969 cmd
->immediate_cmd
= ((hdr
->opcode
& ISCSI_OP_IMMEDIATE
) ? 1 : 0);
1970 conn
->sess
->init_task_tag
= cmd
->init_task_tag
= hdr
->itt
;
1971 cmd
->targ_xfer_tag
= 0xFFFFFFFF;
1972 cmd
->cmd_sn
= be32_to_cpu(hdr
->cmdsn
);
1973 cmd
->exp_stat_sn
= be32_to_cpu(hdr
->exp_statsn
);
1974 cmd
->data_direction
= DMA_NONE
;
1976 spin_lock_bh(&conn
->cmd_lock
);
1977 list_add_tail(&cmd
->i_conn_node
, &conn
->conn_cmd_list
);
1978 spin_unlock_bh(&conn
->cmd_lock
);
1980 iscsit_ack_from_expstatsn(conn
, be32_to_cpu(hdr
->exp_statsn
));
1982 if (!(hdr
->opcode
& ISCSI_OP_IMMEDIATE
)) {
1983 cmdsn_ret
= iscsit_sequence_cmd(conn
, cmd
, hdr
->cmdsn
);
1984 if (cmdsn_ret
== CMDSN_ERROR_CANNOT_RECOVER
)
1985 return iscsit_add_reject_from_cmd(
1986 ISCSI_REASON_PROTOCOL_ERROR
,
1992 return iscsit_execute_cmd(cmd
, 0);
1995 int iscsit_logout_closesession(struct iscsi_cmd
*cmd
, struct iscsi_conn
*conn
)
1997 struct iscsi_conn
*conn_p
;
1998 struct iscsi_session
*sess
= conn
->sess
;
2000 pr_debug("Received logout request CLOSESESSION on CID: %hu"
2001 " for SID: %u.\n", conn
->cid
, conn
->sess
->sid
);
2003 atomic_set(&sess
->session_logout
, 1);
2004 atomic_set(&conn
->conn_logout_remove
, 1);
2005 conn
->conn_logout_reason
= ISCSI_LOGOUT_REASON_CLOSE_SESSION
;
2007 iscsit_inc_conn_usage_count(conn
);
2008 iscsit_inc_session_usage_count(sess
);
2010 spin_lock_bh(&sess
->conn_lock
);
2011 list_for_each_entry(conn_p
, &sess
->sess_conn_list
, conn_list
) {
2012 if (conn_p
->conn_state
!= TARG_CONN_STATE_LOGGED_IN
)
2015 pr_debug("Moving to TARG_CONN_STATE_IN_LOGOUT.\n");
2016 conn_p
->conn_state
= TARG_CONN_STATE_IN_LOGOUT
;
2018 spin_unlock_bh(&sess
->conn_lock
);
2020 iscsit_add_cmd_to_response_queue(cmd
, conn
, cmd
->i_state
);
2025 int iscsit_logout_closeconnection(struct iscsi_cmd
*cmd
, struct iscsi_conn
*conn
)
2027 struct iscsi_conn
*l_conn
;
2028 struct iscsi_session
*sess
= conn
->sess
;
2030 pr_debug("Received logout request CLOSECONNECTION for CID:"
2031 " %hu on CID: %hu.\n", cmd
->logout_cid
, conn
->cid
);
2034 * A Logout Request with a CLOSECONNECTION reason code for a CID
2035 * can arrive on a connection with a differing CID.
2037 if (conn
->cid
== cmd
->logout_cid
) {
2038 spin_lock_bh(&conn
->state_lock
);
2039 pr_debug("Moving to TARG_CONN_STATE_IN_LOGOUT.\n");
2040 conn
->conn_state
= TARG_CONN_STATE_IN_LOGOUT
;
2042 atomic_set(&conn
->conn_logout_remove
, 1);
2043 conn
->conn_logout_reason
= ISCSI_LOGOUT_REASON_CLOSE_CONNECTION
;
2044 iscsit_inc_conn_usage_count(conn
);
2046 spin_unlock_bh(&conn
->state_lock
);
2049 * Handle all different cid CLOSECONNECTION requests in
2050 * iscsit_logout_post_handler_diffcid() as to give enough
2051 * time for any non immediate command's CmdSN to be
2052 * acknowledged on the connection in question.
2054 * Here we simply make sure the CID is still around.
2056 l_conn
= iscsit_get_conn_from_cid(sess
,
2059 cmd
->logout_response
= ISCSI_LOGOUT_CID_NOT_FOUND
;
2060 iscsit_add_cmd_to_response_queue(cmd
, conn
,
2065 iscsit_dec_conn_usage_count(l_conn
);
2068 iscsit_add_cmd_to_response_queue(cmd
, conn
, cmd
->i_state
);
2073 int iscsit_logout_removeconnforrecovery(struct iscsi_cmd
*cmd
, struct iscsi_conn
*conn
)
2075 struct iscsi_session
*sess
= conn
->sess
;
2077 pr_debug("Received explicit REMOVECONNFORRECOVERY logout for"
2078 " CID: %hu on CID: %hu.\n", cmd
->logout_cid
, conn
->cid
);
2080 if (sess
->sess_ops
->ErrorRecoveryLevel
!= 2) {
2081 pr_err("Received Logout Request REMOVECONNFORRECOVERY"
2082 " while ERL!=2.\n");
2083 cmd
->logout_response
= ISCSI_LOGOUT_RECOVERY_UNSUPPORTED
;
2084 iscsit_add_cmd_to_response_queue(cmd
, conn
, cmd
->i_state
);
2088 if (conn
->cid
== cmd
->logout_cid
) {
2089 pr_err("Received Logout Request REMOVECONNFORRECOVERY"
2090 " with CID: %hu on CID: %hu, implementation error.\n",
2091 cmd
->logout_cid
, conn
->cid
);
2092 cmd
->logout_response
= ISCSI_LOGOUT_CLEANUP_FAILED
;
2093 iscsit_add_cmd_to_response_queue(cmd
, conn
, cmd
->i_state
);
2097 iscsit_add_cmd_to_response_queue(cmd
, conn
, cmd
->i_state
);
2102 static int iscsit_handle_logout_cmd(
2103 struct iscsi_conn
*conn
,
2106 int cmdsn_ret
, logout_remove
= 0;
2108 struct iscsi_cmd
*cmd
;
2109 struct iscsi_logout
*hdr
;
2110 struct iscsi_tiqn
*tiqn
= iscsit_snmp_get_tiqn(conn
);
2112 hdr
= (struct iscsi_logout
*) buf
;
2113 reason_code
= (hdr
->flags
& 0x7f);
2116 spin_lock(&tiqn
->logout_stats
.lock
);
2117 if (reason_code
== ISCSI_LOGOUT_REASON_CLOSE_SESSION
)
2118 tiqn
->logout_stats
.normal_logouts
++;
2120 tiqn
->logout_stats
.abnormal_logouts
++;
2121 spin_unlock(&tiqn
->logout_stats
.lock
);
2124 pr_debug("Got Logout Request ITT: 0x%08x CmdSN: 0x%08x"
2125 " ExpStatSN: 0x%08x Reason: 0x%02x CID: %hu on CID: %hu\n",
2126 hdr
->itt
, hdr
->cmdsn
, hdr
->exp_statsn
, reason_code
,
2127 hdr
->cid
, conn
->cid
);
2129 if (conn
->conn_state
!= TARG_CONN_STATE_LOGGED_IN
) {
2130 pr_err("Received logout request on connection that"
2131 " is not in logged in state, ignoring request.\n");
2135 cmd
= iscsit_allocate_cmd(conn
, GFP_KERNEL
);
2137 return iscsit_add_reject(ISCSI_REASON_BOOKMARK_NO_RESOURCES
, 1,
2140 cmd
->iscsi_opcode
= ISCSI_OP_LOGOUT
;
2141 cmd
->i_state
= ISTATE_SEND_LOGOUTRSP
;
2142 cmd
->immediate_cmd
= ((hdr
->opcode
& ISCSI_OP_IMMEDIATE
) ? 1 : 0);
2143 conn
->sess
->init_task_tag
= cmd
->init_task_tag
= hdr
->itt
;
2144 cmd
->targ_xfer_tag
= 0xFFFFFFFF;
2145 cmd
->cmd_sn
= be32_to_cpu(hdr
->cmdsn
);
2146 cmd
->exp_stat_sn
= be32_to_cpu(hdr
->exp_statsn
);
2147 cmd
->logout_cid
= be16_to_cpu(hdr
->cid
);
2148 cmd
->logout_reason
= reason_code
;
2149 cmd
->data_direction
= DMA_NONE
;
2152 * We need to sleep in these cases (by returning 1) until the Logout
2153 * Response gets sent in the tx thread.
2155 if ((reason_code
== ISCSI_LOGOUT_REASON_CLOSE_SESSION
) ||
2156 ((reason_code
== ISCSI_LOGOUT_REASON_CLOSE_CONNECTION
) &&
2157 be16_to_cpu(hdr
->cid
) == conn
->cid
))
2160 spin_lock_bh(&conn
->cmd_lock
);
2161 list_add_tail(&cmd
->i_conn_node
, &conn
->conn_cmd_list
);
2162 spin_unlock_bh(&conn
->cmd_lock
);
2164 if (reason_code
!= ISCSI_LOGOUT_REASON_RECOVERY
)
2165 iscsit_ack_from_expstatsn(conn
, be32_to_cpu(hdr
->exp_statsn
));
2168 * Immediate commands are executed, well, immediately.
2169 * Non-Immediate Logout Commands are executed in CmdSN order.
2171 if (cmd
->immediate_cmd
) {
2172 int ret
= iscsit_execute_cmd(cmd
, 0);
2177 cmdsn_ret
= iscsit_sequence_cmd(conn
, cmd
, hdr
->cmdsn
);
2178 if (cmdsn_ret
== CMDSN_LOWER_THAN_EXP
) {
2180 } else if (cmdsn_ret
== CMDSN_ERROR_CANNOT_RECOVER
) {
2181 return iscsit_add_reject_from_cmd(
2182 ISCSI_REASON_PROTOCOL_ERROR
,
2187 return logout_remove
;
2190 static int iscsit_handle_snack(
2191 struct iscsi_conn
*conn
,
2194 struct iscsi_snack
*hdr
;
2196 hdr
= (struct iscsi_snack
*) buf
;
2197 hdr
->flags
&= ~ISCSI_FLAG_CMD_FINAL
;
2199 pr_debug("Got ISCSI_INIT_SNACK, ITT: 0x%08x, ExpStatSN:"
2200 " 0x%08x, Type: 0x%02x, BegRun: 0x%08x, RunLength: 0x%08x,"
2201 " CID: %hu\n", hdr
->itt
, hdr
->exp_statsn
, hdr
->flags
,
2202 hdr
->begrun
, hdr
->runlength
, conn
->cid
);
2204 if (!conn
->sess
->sess_ops
->ErrorRecoveryLevel
) {
2205 pr_err("Initiator sent SNACK request while in"
2206 " ErrorRecoveryLevel=0.\n");
2207 return iscsit_add_reject(ISCSI_REASON_PROTOCOL_ERROR
, 1,
2211 * SNACK_DATA and SNACK_R2T are both 0, so check which function to
2212 * call from inside iscsi_send_recovery_datain_or_r2t().
2214 switch (hdr
->flags
& ISCSI_FLAG_SNACK_TYPE_MASK
) {
2216 return iscsit_handle_recovery_datain_or_r2t(conn
, buf
,
2218 be32_to_cpu(hdr
->ttt
),
2219 be32_to_cpu(hdr
->begrun
),
2220 be32_to_cpu(hdr
->runlength
));
2221 case ISCSI_FLAG_SNACK_TYPE_STATUS
:
2222 return iscsit_handle_status_snack(conn
, hdr
->itt
,
2223 be32_to_cpu(hdr
->ttt
),
2224 be32_to_cpu(hdr
->begrun
), be32_to_cpu(hdr
->runlength
));
2225 case ISCSI_FLAG_SNACK_TYPE_DATA_ACK
:
2226 return iscsit_handle_data_ack(conn
, be32_to_cpu(hdr
->ttt
),
2227 be32_to_cpu(hdr
->begrun
),
2228 be32_to_cpu(hdr
->runlength
));
2229 case ISCSI_FLAG_SNACK_TYPE_RDATA
:
2230 /* FIXME: Support R-Data SNACK */
2231 pr_err("R-Data SNACK Not Supported.\n");
2232 return iscsit_add_reject(ISCSI_REASON_PROTOCOL_ERROR
, 1,
2235 pr_err("Unknown SNACK type 0x%02x, protocol"
2236 " error.\n", hdr
->flags
& 0x0f);
2237 return iscsit_add_reject(ISCSI_REASON_PROTOCOL_ERROR
, 1,
2244 static void iscsit_rx_thread_wait_for_tcp(struct iscsi_conn
*conn
)
2246 if ((conn
->sock
->sk
->sk_shutdown
& SEND_SHUTDOWN
) ||
2247 (conn
->sock
->sk
->sk_shutdown
& RCV_SHUTDOWN
)) {
2248 wait_for_completion_interruptible_timeout(
2249 &conn
->rx_half_close_comp
,
2250 ISCSI_RX_THREAD_TCP_TIMEOUT
* HZ
);
2254 static int iscsit_handle_immediate_data(
2255 struct iscsi_cmd
*cmd
,
2259 int iov_ret
, rx_got
= 0, rx_size
= 0;
2260 u32 checksum
, iov_count
= 0, padding
= 0;
2261 struct iscsi_conn
*conn
= cmd
->conn
;
2264 iov_ret
= iscsit_map_iovec(cmd
, cmd
->iov_data
, cmd
->write_data_done
, length
);
2266 return IMMEDIATE_DATA_CANNOT_RECOVER
;
2269 iov_count
= iov_ret
;
2270 iov
= &cmd
->iov_data
[0];
2272 padding
= ((-length
) & 3);
2274 iov
[iov_count
].iov_base
= cmd
->pad_bytes
;
2275 iov
[iov_count
++].iov_len
= padding
;
2279 if (conn
->conn_ops
->DataDigest
) {
2280 iov
[iov_count
].iov_base
= &checksum
;
2281 iov
[iov_count
++].iov_len
= ISCSI_CRC_LEN
;
2282 rx_size
+= ISCSI_CRC_LEN
;
2285 rx_got
= rx_data(conn
, &cmd
->iov_data
[0], iov_count
, rx_size
);
2287 iscsit_unmap_iovec(cmd
);
2289 if (rx_got
!= rx_size
) {
2290 iscsit_rx_thread_wait_for_tcp(conn
);
2291 return IMMEDIATE_DATA_CANNOT_RECOVER
;
2294 if (conn
->conn_ops
->DataDigest
) {
2297 data_crc
= iscsit_do_crypto_hash_sg(&conn
->conn_rx_hash
, cmd
,
2298 cmd
->write_data_done
, length
, padding
,
2301 if (checksum
!= data_crc
) {
2302 pr_err("ImmediateData CRC32C DataDigest 0x%08x"
2303 " does not match computed 0x%08x\n", checksum
,
2306 if (!conn
->sess
->sess_ops
->ErrorRecoveryLevel
) {
2307 pr_err("Unable to recover from"
2308 " Immediate Data digest failure while"
2310 iscsit_add_reject_from_cmd(
2311 ISCSI_REASON_DATA_DIGEST_ERROR
,
2313 return IMMEDIATE_DATA_CANNOT_RECOVER
;
2315 iscsit_add_reject_from_cmd(
2316 ISCSI_REASON_DATA_DIGEST_ERROR
,
2318 return IMMEDIATE_DATA_ERL1_CRC_FAILURE
;
2321 pr_debug("Got CRC32C DataDigest 0x%08x for"
2322 " %u bytes of Immediate Data\n", checksum
,
2327 cmd
->write_data_done
+= length
;
2329 if (cmd
->write_data_done
== cmd
->se_cmd
.data_length
) {
2330 spin_lock_bh(&cmd
->istate_lock
);
2331 cmd
->cmd_flags
|= ICF_GOT_LAST_DATAOUT
;
2332 cmd
->i_state
= ISTATE_RECEIVED_LAST_DATAOUT
;
2333 spin_unlock_bh(&cmd
->istate_lock
);
2336 return IMMEDIATE_DATA_NORMAL_OPERATION
;
2340 * Called with sess->conn_lock held.
2342 /* #warning iscsi_build_conn_drop_async_message() only sends out on connections
2343 with active network interface */
2344 static void iscsit_build_conn_drop_async_message(struct iscsi_conn
*conn
)
2346 struct iscsi_cmd
*cmd
;
2347 struct iscsi_conn
*conn_p
;
2350 * Only send a Asynchronous Message on connections whos network
2351 * interface is still functional.
2353 list_for_each_entry(conn_p
, &conn
->sess
->sess_conn_list
, conn_list
) {
2354 if (conn_p
->conn_state
== TARG_CONN_STATE_LOGGED_IN
) {
2355 iscsit_inc_conn_usage_count(conn_p
);
2363 cmd
= iscsit_allocate_cmd(conn_p
, GFP_KERNEL
);
2365 iscsit_dec_conn_usage_count(conn_p
);
2369 cmd
->logout_cid
= conn
->cid
;
2370 cmd
->iscsi_opcode
= ISCSI_OP_ASYNC_EVENT
;
2371 cmd
->i_state
= ISTATE_SEND_ASYNCMSG
;
2373 spin_lock_bh(&conn_p
->cmd_lock
);
2374 list_add_tail(&cmd
->i_conn_node
, &conn_p
->conn_cmd_list
);
2375 spin_unlock_bh(&conn_p
->cmd_lock
);
2377 iscsit_add_cmd_to_response_queue(cmd
, conn_p
, cmd
->i_state
);
2378 iscsit_dec_conn_usage_count(conn_p
);
2381 static int iscsit_send_conn_drop_async_message(
2382 struct iscsi_cmd
*cmd
,
2383 struct iscsi_conn
*conn
)
2385 struct iscsi_async
*hdr
;
2387 cmd
->tx_size
= ISCSI_HDR_LEN
;
2388 cmd
->iscsi_opcode
= ISCSI_OP_ASYNC_EVENT
;
2390 hdr
= (struct iscsi_async
*) cmd
->pdu
;
2391 hdr
->opcode
= ISCSI_OP_ASYNC_EVENT
;
2392 hdr
->flags
= ISCSI_FLAG_CMD_FINAL
;
2393 cmd
->init_task_tag
= RESERVED_ITT
;
2394 cmd
->targ_xfer_tag
= 0xFFFFFFFF;
2395 put_unaligned_be64(0xFFFFFFFFFFFFFFFFULL
, &hdr
->rsvd4
[0]);
2396 cmd
->stat_sn
= conn
->stat_sn
++;
2397 hdr
->statsn
= cpu_to_be32(cmd
->stat_sn
);
2398 hdr
->exp_cmdsn
= cpu_to_be32(conn
->sess
->exp_cmd_sn
);
2399 hdr
->max_cmdsn
= cpu_to_be32(conn
->sess
->max_cmd_sn
);
2400 hdr
->async_event
= ISCSI_ASYNC_MSG_DROPPING_CONNECTION
;
2401 hdr
->param1
= cpu_to_be16(cmd
->logout_cid
);
2402 hdr
->param2
= cpu_to_be16(conn
->sess
->sess_ops
->DefaultTime2Wait
);
2403 hdr
->param3
= cpu_to_be16(conn
->sess
->sess_ops
->DefaultTime2Retain
);
2405 if (conn
->conn_ops
->HeaderDigest
) {
2406 u32
*header_digest
= (u32
*)&cmd
->pdu
[ISCSI_HDR_LEN
];
2408 iscsit_do_crypto_hash_buf(&conn
->conn_tx_hash
,
2409 (unsigned char *)hdr
, ISCSI_HDR_LEN
,
2410 0, NULL
, (u8
*)header_digest
);
2412 cmd
->tx_size
+= ISCSI_CRC_LEN
;
2413 pr_debug("Attaching CRC32C HeaderDigest to"
2414 " Async Message 0x%08x\n", *header_digest
);
2417 cmd
->iov_misc
[0].iov_base
= cmd
->pdu
;
2418 cmd
->iov_misc
[0].iov_len
= cmd
->tx_size
;
2419 cmd
->iov_misc_count
= 1;
2421 pr_debug("Sending Connection Dropped Async Message StatSN:"
2422 " 0x%08x, for CID: %hu on CID: %hu\n", cmd
->stat_sn
,
2423 cmd
->logout_cid
, conn
->cid
);
2427 static void iscsit_tx_thread_wait_for_tcp(struct iscsi_conn
*conn
)
2429 if ((conn
->sock
->sk
->sk_shutdown
& SEND_SHUTDOWN
) ||
2430 (conn
->sock
->sk
->sk_shutdown
& RCV_SHUTDOWN
)) {
2431 wait_for_completion_interruptible_timeout(
2432 &conn
->tx_half_close_comp
,
2433 ISCSI_TX_THREAD_TCP_TIMEOUT
* HZ
);
2437 static int iscsit_send_data_in(
2438 struct iscsi_cmd
*cmd
,
2439 struct iscsi_conn
*conn
)
2441 int iov_ret
= 0, set_statsn
= 0;
2442 u32 iov_count
= 0, tx_size
= 0;
2443 struct iscsi_datain datain
;
2444 struct iscsi_datain_req
*dr
;
2445 struct iscsi_data_rsp
*hdr
;
2450 memset(&datain
, 0, sizeof(struct iscsi_datain
));
2451 dr
= iscsit_get_datain_values(cmd
, &datain
);
2453 pr_err("iscsit_get_datain_values failed for ITT: 0x%08x\n",
2454 cmd
->init_task_tag
);
2459 * Be paranoid and double check the logic for now.
2461 if ((datain
.offset
+ datain
.length
) > cmd
->se_cmd
.data_length
) {
2462 pr_err("Command ITT: 0x%08x, datain.offset: %u and"
2463 " datain.length: %u exceeds cmd->data_length: %u\n",
2464 cmd
->init_task_tag
, datain
.offset
, datain
.length
,
2465 cmd
->se_cmd
.data_length
);
2469 spin_lock_bh(&conn
->sess
->session_stats_lock
);
2470 conn
->sess
->tx_data_octets
+= datain
.length
;
2471 if (conn
->sess
->se_sess
->se_node_acl
) {
2472 spin_lock(&conn
->sess
->se_sess
->se_node_acl
->stats_lock
);
2473 conn
->sess
->se_sess
->se_node_acl
->read_bytes
+= datain
.length
;
2474 spin_unlock(&conn
->sess
->se_sess
->se_node_acl
->stats_lock
);
2476 spin_unlock_bh(&conn
->sess
->session_stats_lock
);
2478 * Special case for successfully execution w/ both DATAIN
2481 if ((datain
.flags
& ISCSI_FLAG_DATA_STATUS
) &&
2482 (cmd
->se_cmd
.se_cmd_flags
& SCF_TRANSPORT_TASK_SENSE
))
2483 datain
.flags
&= ~ISCSI_FLAG_DATA_STATUS
;
2485 if ((dr
->dr_complete
== DATAIN_COMPLETE_NORMAL
) ||
2486 (dr
->dr_complete
== DATAIN_COMPLETE_CONNECTION_RECOVERY
)) {
2487 iscsit_increment_maxcmdsn(cmd
, conn
->sess
);
2488 cmd
->stat_sn
= conn
->stat_sn
++;
2490 } else if (dr
->dr_complete
==
2491 DATAIN_COMPLETE_WITHIN_COMMAND_RECOVERY
)
2495 hdr
= (struct iscsi_data_rsp
*) cmd
->pdu
;
2496 memset(hdr
, 0, ISCSI_HDR_LEN
);
2497 hdr
->opcode
= ISCSI_OP_SCSI_DATA_IN
;
2498 hdr
->flags
= datain
.flags
;
2499 if (hdr
->flags
& ISCSI_FLAG_DATA_STATUS
) {
2500 if (cmd
->se_cmd
.se_cmd_flags
& SCF_OVERFLOW_BIT
) {
2501 hdr
->flags
|= ISCSI_FLAG_DATA_OVERFLOW
;
2502 hdr
->residual_count
= cpu_to_be32(cmd
->se_cmd
.residual_count
);
2503 } else if (cmd
->se_cmd
.se_cmd_flags
& SCF_UNDERFLOW_BIT
) {
2504 hdr
->flags
|= ISCSI_FLAG_DATA_UNDERFLOW
;
2505 hdr
->residual_count
= cpu_to_be32(cmd
->se_cmd
.residual_count
);
2508 hton24(hdr
->dlength
, datain
.length
);
2509 if (hdr
->flags
& ISCSI_FLAG_DATA_ACK
)
2510 int_to_scsilun(cmd
->se_cmd
.orig_fe_lun
,
2511 (struct scsi_lun
*)&hdr
->lun
);
2513 put_unaligned_le64(0xFFFFFFFFFFFFFFFFULL
, &hdr
->lun
);
2515 hdr
->itt
= cmd
->init_task_tag
;
2517 if (hdr
->flags
& ISCSI_FLAG_DATA_ACK
)
2518 hdr
->ttt
= cpu_to_be32(cmd
->targ_xfer_tag
);
2520 hdr
->ttt
= cpu_to_be32(0xFFFFFFFF);
2522 hdr
->statsn
= cpu_to_be32(cmd
->stat_sn
);
2524 hdr
->statsn
= cpu_to_be32(0xFFFFFFFF);
2526 hdr
->exp_cmdsn
= cpu_to_be32(conn
->sess
->exp_cmd_sn
);
2527 hdr
->max_cmdsn
= cpu_to_be32(conn
->sess
->max_cmd_sn
);
2528 hdr
->datasn
= cpu_to_be32(datain
.data_sn
);
2529 hdr
->offset
= cpu_to_be32(datain
.offset
);
2531 iov
= &cmd
->iov_data
[0];
2532 iov
[iov_count
].iov_base
= cmd
->pdu
;
2533 iov
[iov_count
++].iov_len
= ISCSI_HDR_LEN
;
2534 tx_size
+= ISCSI_HDR_LEN
;
2536 if (conn
->conn_ops
->HeaderDigest
) {
2537 u32
*header_digest
= (u32
*)&cmd
->pdu
[ISCSI_HDR_LEN
];
2539 iscsit_do_crypto_hash_buf(&conn
->conn_tx_hash
,
2540 (unsigned char *)hdr
, ISCSI_HDR_LEN
,
2541 0, NULL
, (u8
*)header_digest
);
2543 iov
[0].iov_len
+= ISCSI_CRC_LEN
;
2544 tx_size
+= ISCSI_CRC_LEN
;
2546 pr_debug("Attaching CRC32 HeaderDigest"
2547 " for DataIN PDU 0x%08x\n", *header_digest
);
2550 iov_ret
= iscsit_map_iovec(cmd
, &cmd
->iov_data
[1], datain
.offset
, datain
.length
);
2554 iov_count
+= iov_ret
;
2555 tx_size
+= datain
.length
;
2557 cmd
->padding
= ((-datain
.length
) & 3);
2559 iov
[iov_count
].iov_base
= cmd
->pad_bytes
;
2560 iov
[iov_count
++].iov_len
= cmd
->padding
;
2561 tx_size
+= cmd
->padding
;
2563 pr_debug("Attaching %u padding bytes\n",
2566 if (conn
->conn_ops
->DataDigest
) {
2567 cmd
->data_crc
= iscsit_do_crypto_hash_sg(&conn
->conn_tx_hash
, cmd
,
2568 datain
.offset
, datain
.length
, cmd
->padding
, cmd
->pad_bytes
);
2570 iov
[iov_count
].iov_base
= &cmd
->data_crc
;
2571 iov
[iov_count
++].iov_len
= ISCSI_CRC_LEN
;
2572 tx_size
+= ISCSI_CRC_LEN
;
2574 pr_debug("Attached CRC32C DataDigest %d bytes, crc"
2575 " 0x%08x\n", datain
.length
+cmd
->padding
, cmd
->data_crc
);
2578 cmd
->iov_data_count
= iov_count
;
2579 cmd
->tx_size
= tx_size
;
2581 pr_debug("Built DataIN ITT: 0x%08x, StatSN: 0x%08x,"
2582 " DataSN: 0x%08x, Offset: %u, Length: %u, CID: %hu\n",
2583 cmd
->init_task_tag
, ntohl(hdr
->statsn
), ntohl(hdr
->datasn
),
2584 ntohl(hdr
->offset
), datain
.length
, conn
->cid
);
2586 /* sendpage is preferred but can't insert markers */
2587 if (!conn
->conn_ops
->IFMarker
)
2588 ret
= iscsit_fe_sendpage_sg(cmd
, conn
);
2590 ret
= iscsit_send_tx_data(cmd
, conn
, 0);
2592 iscsit_unmap_iovec(cmd
);
2595 iscsit_tx_thread_wait_for_tcp(conn
);
2599 if (dr
->dr_complete
) {
2600 eodr
= (cmd
->se_cmd
.se_cmd_flags
& SCF_TRANSPORT_TASK_SENSE
) ?
2602 iscsit_free_datain_req(cmd
, dr
);
2608 static int iscsit_send_logout_response(
2609 struct iscsi_cmd
*cmd
,
2610 struct iscsi_conn
*conn
)
2612 int niov
= 0, tx_size
;
2613 struct iscsi_conn
*logout_conn
= NULL
;
2614 struct iscsi_conn_recovery
*cr
= NULL
;
2615 struct iscsi_session
*sess
= conn
->sess
;
2617 struct iscsi_logout_rsp
*hdr
;
2619 * The actual shutting down of Sessions and/or Connections
2620 * for CLOSESESSION and CLOSECONNECTION Logout Requests
2621 * is done in scsi_logout_post_handler().
2623 switch (cmd
->logout_reason
) {
2624 case ISCSI_LOGOUT_REASON_CLOSE_SESSION
:
2625 pr_debug("iSCSI session logout successful, setting"
2626 " logout response to ISCSI_LOGOUT_SUCCESS.\n");
2627 cmd
->logout_response
= ISCSI_LOGOUT_SUCCESS
;
2629 case ISCSI_LOGOUT_REASON_CLOSE_CONNECTION
:
2630 if (cmd
->logout_response
== ISCSI_LOGOUT_CID_NOT_FOUND
)
2633 * For CLOSECONNECTION logout requests carrying
2634 * a matching logout CID -> local CID, the reference
2635 * for the local CID will have been incremented in
2636 * iscsi_logout_closeconnection().
2638 * For CLOSECONNECTION logout requests carrying
2639 * a different CID than the connection it arrived
2640 * on, the connection responding to cmd->logout_cid
2641 * is stopped in iscsit_logout_post_handler_diffcid().
2644 pr_debug("iSCSI CID: %hu logout on CID: %hu"
2645 " successful.\n", cmd
->logout_cid
, conn
->cid
);
2646 cmd
->logout_response
= ISCSI_LOGOUT_SUCCESS
;
2648 case ISCSI_LOGOUT_REASON_RECOVERY
:
2649 if ((cmd
->logout_response
== ISCSI_LOGOUT_RECOVERY_UNSUPPORTED
) ||
2650 (cmd
->logout_response
== ISCSI_LOGOUT_CLEANUP_FAILED
))
2653 * If the connection is still active from our point of view
2654 * force connection recovery to occur.
2656 logout_conn
= iscsit_get_conn_from_cid_rcfr(sess
,
2659 iscsit_connection_reinstatement_rcfr(logout_conn
);
2660 iscsit_dec_conn_usage_count(logout_conn
);
2663 cr
= iscsit_get_inactive_connection_recovery_entry(
2664 conn
->sess
, cmd
->logout_cid
);
2666 pr_err("Unable to locate CID: %hu for"
2667 " REMOVECONNFORRECOVERY Logout Request.\n",
2669 cmd
->logout_response
= ISCSI_LOGOUT_CID_NOT_FOUND
;
2673 iscsit_discard_cr_cmds_by_expstatsn(cr
, cmd
->exp_stat_sn
);
2675 pr_debug("iSCSI REMOVECONNFORRECOVERY logout"
2676 " for recovery for CID: %hu on CID: %hu successful.\n",
2677 cmd
->logout_cid
, conn
->cid
);
2678 cmd
->logout_response
= ISCSI_LOGOUT_SUCCESS
;
2681 pr_err("Unknown cmd->logout_reason: 0x%02x\n",
2682 cmd
->logout_reason
);
2686 tx_size
= ISCSI_HDR_LEN
;
2687 hdr
= (struct iscsi_logout_rsp
*)cmd
->pdu
;
2688 memset(hdr
, 0, ISCSI_HDR_LEN
);
2689 hdr
->opcode
= ISCSI_OP_LOGOUT_RSP
;
2690 hdr
->flags
|= ISCSI_FLAG_CMD_FINAL
;
2691 hdr
->response
= cmd
->logout_response
;
2692 hdr
->itt
= cmd
->init_task_tag
;
2693 cmd
->stat_sn
= conn
->stat_sn
++;
2694 hdr
->statsn
= cpu_to_be32(cmd
->stat_sn
);
2696 iscsit_increment_maxcmdsn(cmd
, conn
->sess
);
2697 hdr
->exp_cmdsn
= cpu_to_be32(conn
->sess
->exp_cmd_sn
);
2698 hdr
->max_cmdsn
= cpu_to_be32(conn
->sess
->max_cmd_sn
);
2700 iov
= &cmd
->iov_misc
[0];
2701 iov
[niov
].iov_base
= cmd
->pdu
;
2702 iov
[niov
++].iov_len
= ISCSI_HDR_LEN
;
2704 if (conn
->conn_ops
->HeaderDigest
) {
2705 u32
*header_digest
= (u32
*)&cmd
->pdu
[ISCSI_HDR_LEN
];
2707 iscsit_do_crypto_hash_buf(&conn
->conn_tx_hash
,
2708 (unsigned char *)hdr
, ISCSI_HDR_LEN
,
2709 0, NULL
, (u8
*)header_digest
);
2711 iov
[0].iov_len
+= ISCSI_CRC_LEN
;
2712 tx_size
+= ISCSI_CRC_LEN
;
2713 pr_debug("Attaching CRC32C HeaderDigest to"
2714 " Logout Response 0x%08x\n", *header_digest
);
2716 cmd
->iov_misc_count
= niov
;
2717 cmd
->tx_size
= tx_size
;
2719 pr_debug("Sending Logout Response ITT: 0x%08x StatSN:"
2720 " 0x%08x Response: 0x%02x CID: %hu on CID: %hu\n",
2721 cmd
->init_task_tag
, cmd
->stat_sn
, hdr
->response
,
2722 cmd
->logout_cid
, conn
->cid
);
2728 * Unsolicited NOPIN, either requesting a response or not.
2730 static int iscsit_send_unsolicited_nopin(
2731 struct iscsi_cmd
*cmd
,
2732 struct iscsi_conn
*conn
,
2735 int tx_size
= ISCSI_HDR_LEN
;
2736 struct iscsi_nopin
*hdr
;
2739 hdr
= (struct iscsi_nopin
*) cmd
->pdu
;
2740 memset(hdr
, 0, ISCSI_HDR_LEN
);
2741 hdr
->opcode
= ISCSI_OP_NOOP_IN
;
2742 hdr
->flags
|= ISCSI_FLAG_CMD_FINAL
;
2743 hdr
->itt
= cmd
->init_task_tag
;
2744 hdr
->ttt
= cpu_to_be32(cmd
->targ_xfer_tag
);
2745 cmd
->stat_sn
= conn
->stat_sn
;
2746 hdr
->statsn
= cpu_to_be32(cmd
->stat_sn
);
2747 hdr
->exp_cmdsn
= cpu_to_be32(conn
->sess
->exp_cmd_sn
);
2748 hdr
->max_cmdsn
= cpu_to_be32(conn
->sess
->max_cmd_sn
);
2750 if (conn
->conn_ops
->HeaderDigest
) {
2751 u32
*header_digest
= (u32
*)&cmd
->pdu
[ISCSI_HDR_LEN
];
2753 iscsit_do_crypto_hash_buf(&conn
->conn_tx_hash
,
2754 (unsigned char *)hdr
, ISCSI_HDR_LEN
,
2755 0, NULL
, (u8
*)header_digest
);
2757 tx_size
+= ISCSI_CRC_LEN
;
2758 pr_debug("Attaching CRC32C HeaderDigest to"
2759 " NopIN 0x%08x\n", *header_digest
);
2762 cmd
->iov_misc
[0].iov_base
= cmd
->pdu
;
2763 cmd
->iov_misc
[0].iov_len
= tx_size
;
2764 cmd
->iov_misc_count
= 1;
2765 cmd
->tx_size
= tx_size
;
2767 pr_debug("Sending Unsolicited NOPIN TTT: 0x%08x StatSN:"
2768 " 0x%08x CID: %hu\n", hdr
->ttt
, cmd
->stat_sn
, conn
->cid
);
2770 ret
= iscsit_send_tx_data(cmd
, conn
, 1);
2772 iscsit_tx_thread_wait_for_tcp(conn
);
2776 spin_lock_bh(&cmd
->istate_lock
);
2777 cmd
->i_state
= want_response
?
2778 ISTATE_SENT_NOPIN_WANT_RESPONSE
: ISTATE_SENT_STATUS
;
2779 spin_unlock_bh(&cmd
->istate_lock
);
2784 static int iscsit_send_nopin_response(
2785 struct iscsi_cmd
*cmd
,
2786 struct iscsi_conn
*conn
)
2788 int niov
= 0, tx_size
;
2791 struct iscsi_nopin
*hdr
;
2793 tx_size
= ISCSI_HDR_LEN
;
2794 hdr
= (struct iscsi_nopin
*) cmd
->pdu
;
2795 memset(hdr
, 0, ISCSI_HDR_LEN
);
2796 hdr
->opcode
= ISCSI_OP_NOOP_IN
;
2797 hdr
->flags
|= ISCSI_FLAG_CMD_FINAL
;
2798 hton24(hdr
->dlength
, cmd
->buf_ptr_size
);
2799 put_unaligned_le64(0xFFFFFFFFFFFFFFFFULL
, &hdr
->lun
);
2800 hdr
->itt
= cmd
->init_task_tag
;
2801 hdr
->ttt
= cpu_to_be32(cmd
->targ_xfer_tag
);
2802 cmd
->stat_sn
= conn
->stat_sn
++;
2803 hdr
->statsn
= cpu_to_be32(cmd
->stat_sn
);
2805 iscsit_increment_maxcmdsn(cmd
, conn
->sess
);
2806 hdr
->exp_cmdsn
= cpu_to_be32(conn
->sess
->exp_cmd_sn
);
2807 hdr
->max_cmdsn
= cpu_to_be32(conn
->sess
->max_cmd_sn
);
2809 iov
= &cmd
->iov_misc
[0];
2810 iov
[niov
].iov_base
= cmd
->pdu
;
2811 iov
[niov
++].iov_len
= ISCSI_HDR_LEN
;
2813 if (conn
->conn_ops
->HeaderDigest
) {
2814 u32
*header_digest
= (u32
*)&cmd
->pdu
[ISCSI_HDR_LEN
];
2816 iscsit_do_crypto_hash_buf(&conn
->conn_tx_hash
,
2817 (unsigned char *)hdr
, ISCSI_HDR_LEN
,
2818 0, NULL
, (u8
*)header_digest
);
2820 iov
[0].iov_len
+= ISCSI_CRC_LEN
;
2821 tx_size
+= ISCSI_CRC_LEN
;
2822 pr_debug("Attaching CRC32C HeaderDigest"
2823 " to NopIn 0x%08x\n", *header_digest
);
2827 * NOPOUT Ping Data is attached to struct iscsi_cmd->buf_ptr.
2828 * NOPOUT DataSegmentLength is at struct iscsi_cmd->buf_ptr_size.
2830 if (cmd
->buf_ptr_size
) {
2831 iov
[niov
].iov_base
= cmd
->buf_ptr
;
2832 iov
[niov
++].iov_len
= cmd
->buf_ptr_size
;
2833 tx_size
+= cmd
->buf_ptr_size
;
2835 pr_debug("Echoing back %u bytes of ping"
2836 " data.\n", cmd
->buf_ptr_size
);
2838 padding
= ((-cmd
->buf_ptr_size
) & 3);
2840 iov
[niov
].iov_base
= &cmd
->pad_bytes
;
2841 iov
[niov
++].iov_len
= padding
;
2843 pr_debug("Attaching %u additional"
2844 " padding bytes.\n", padding
);
2846 if (conn
->conn_ops
->DataDigest
) {
2847 iscsit_do_crypto_hash_buf(&conn
->conn_tx_hash
,
2848 cmd
->buf_ptr
, cmd
->buf_ptr_size
,
2849 padding
, (u8
*)&cmd
->pad_bytes
,
2850 (u8
*)&cmd
->data_crc
);
2852 iov
[niov
].iov_base
= &cmd
->data_crc
;
2853 iov
[niov
++].iov_len
= ISCSI_CRC_LEN
;
2854 tx_size
+= ISCSI_CRC_LEN
;
2855 pr_debug("Attached DataDigest for %u"
2856 " bytes of ping data, CRC 0x%08x\n",
2857 cmd
->buf_ptr_size
, cmd
->data_crc
);
2861 cmd
->iov_misc_count
= niov
;
2862 cmd
->tx_size
= tx_size
;
2864 pr_debug("Sending NOPIN Response ITT: 0x%08x, TTT:"
2865 " 0x%08x, StatSN: 0x%08x, Length %u\n", cmd
->init_task_tag
,
2866 cmd
->targ_xfer_tag
, cmd
->stat_sn
, cmd
->buf_ptr_size
);
2871 static int iscsit_send_r2t(
2872 struct iscsi_cmd
*cmd
,
2873 struct iscsi_conn
*conn
)
2876 struct iscsi_r2t
*r2t
;
2877 struct iscsi_r2t_rsp
*hdr
;
2880 r2t
= iscsit_get_r2t_from_list(cmd
);
2884 hdr
= (struct iscsi_r2t_rsp
*) cmd
->pdu
;
2885 memset(hdr
, 0, ISCSI_HDR_LEN
);
2886 hdr
->opcode
= ISCSI_OP_R2T
;
2887 hdr
->flags
|= ISCSI_FLAG_CMD_FINAL
;
2888 int_to_scsilun(cmd
->se_cmd
.orig_fe_lun
,
2889 (struct scsi_lun
*)&hdr
->lun
);
2890 hdr
->itt
= cmd
->init_task_tag
;
2891 spin_lock_bh(&conn
->sess
->ttt_lock
);
2892 r2t
->targ_xfer_tag
= conn
->sess
->targ_xfer_tag
++;
2893 if (r2t
->targ_xfer_tag
== 0xFFFFFFFF)
2894 r2t
->targ_xfer_tag
= conn
->sess
->targ_xfer_tag
++;
2895 spin_unlock_bh(&conn
->sess
->ttt_lock
);
2896 hdr
->ttt
= cpu_to_be32(r2t
->targ_xfer_tag
);
2897 hdr
->statsn
= cpu_to_be32(conn
->stat_sn
);
2898 hdr
->exp_cmdsn
= cpu_to_be32(conn
->sess
->exp_cmd_sn
);
2899 hdr
->max_cmdsn
= cpu_to_be32(conn
->sess
->max_cmd_sn
);
2900 hdr
->r2tsn
= cpu_to_be32(r2t
->r2t_sn
);
2901 hdr
->data_offset
= cpu_to_be32(r2t
->offset
);
2902 hdr
->data_length
= cpu_to_be32(r2t
->xfer_len
);
2904 cmd
->iov_misc
[0].iov_base
= cmd
->pdu
;
2905 cmd
->iov_misc
[0].iov_len
= ISCSI_HDR_LEN
;
2906 tx_size
+= ISCSI_HDR_LEN
;
2908 if (conn
->conn_ops
->HeaderDigest
) {
2909 u32
*header_digest
= (u32
*)&cmd
->pdu
[ISCSI_HDR_LEN
];
2911 iscsit_do_crypto_hash_buf(&conn
->conn_tx_hash
,
2912 (unsigned char *)hdr
, ISCSI_HDR_LEN
,
2913 0, NULL
, (u8
*)header_digest
);
2915 cmd
->iov_misc
[0].iov_len
+= ISCSI_CRC_LEN
;
2916 tx_size
+= ISCSI_CRC_LEN
;
2917 pr_debug("Attaching CRC32 HeaderDigest for R2T"
2918 " PDU 0x%08x\n", *header_digest
);
2921 pr_debug("Built %sR2T, ITT: 0x%08x, TTT: 0x%08x, StatSN:"
2922 " 0x%08x, R2TSN: 0x%08x, Offset: %u, DDTL: %u, CID: %hu\n",
2923 (!r2t
->recovery_r2t
) ? "" : "Recovery ", cmd
->init_task_tag
,
2924 r2t
->targ_xfer_tag
, ntohl(hdr
->statsn
), r2t
->r2t_sn
,
2925 r2t
->offset
, r2t
->xfer_len
, conn
->cid
);
2927 cmd
->iov_misc_count
= 1;
2928 cmd
->tx_size
= tx_size
;
2930 spin_lock_bh(&cmd
->r2t_lock
);
2932 spin_unlock_bh(&cmd
->r2t_lock
);
2934 ret
= iscsit_send_tx_data(cmd
, conn
, 1);
2936 iscsit_tx_thread_wait_for_tcp(conn
);
2940 spin_lock_bh(&cmd
->dataout_timeout_lock
);
2941 iscsit_start_dataout_timer(cmd
, conn
);
2942 spin_unlock_bh(&cmd
->dataout_timeout_lock
);
2948 * @recovery: If called from iscsi_task_reassign_complete_write() for
2949 * connection recovery.
2951 int iscsit_build_r2ts_for_cmd(
2952 struct iscsi_cmd
*cmd
,
2953 struct iscsi_conn
*conn
,
2957 u32 offset
= 0, xfer_len
= 0;
2959 spin_lock_bh(&cmd
->r2t_lock
);
2960 if (cmd
->cmd_flags
& ICF_SENT_LAST_R2T
) {
2961 spin_unlock_bh(&cmd
->r2t_lock
);
2965 if (conn
->sess
->sess_ops
->DataSequenceInOrder
&&
2967 cmd
->r2t_offset
= max(cmd
->r2t_offset
, cmd
->write_data_done
);
2969 while (cmd
->outstanding_r2ts
< conn
->sess
->sess_ops
->MaxOutstandingR2T
) {
2970 if (conn
->sess
->sess_ops
->DataSequenceInOrder
) {
2971 offset
= cmd
->r2t_offset
;
2973 if (first_r2t
&& recovery
) {
2974 int new_data_end
= offset
+
2975 conn
->sess
->sess_ops
->MaxBurstLength
-
2976 cmd
->next_burst_len
;
2978 if (new_data_end
> cmd
->se_cmd
.data_length
)
2979 xfer_len
= cmd
->se_cmd
.data_length
- offset
;
2982 conn
->sess
->sess_ops
->MaxBurstLength
-
2983 cmd
->next_burst_len
;
2985 int new_data_end
= offset
+
2986 conn
->sess
->sess_ops
->MaxBurstLength
;
2988 if (new_data_end
> cmd
->se_cmd
.data_length
)
2989 xfer_len
= cmd
->se_cmd
.data_length
- offset
;
2991 xfer_len
= conn
->sess
->sess_ops
->MaxBurstLength
;
2993 cmd
->r2t_offset
+= xfer_len
;
2995 if (cmd
->r2t_offset
== cmd
->se_cmd
.data_length
)
2996 cmd
->cmd_flags
|= ICF_SENT_LAST_R2T
;
2998 struct iscsi_seq
*seq
;
3000 seq
= iscsit_get_seq_holder_for_r2t(cmd
);
3002 spin_unlock_bh(&cmd
->r2t_lock
);
3006 offset
= seq
->offset
;
3007 xfer_len
= seq
->xfer_len
;
3009 if (cmd
->seq_send_order
== cmd
->seq_count
)
3010 cmd
->cmd_flags
|= ICF_SENT_LAST_R2T
;
3012 cmd
->outstanding_r2ts
++;
3015 if (iscsit_add_r2t_to_list(cmd
, offset
, xfer_len
, 0, 0) < 0) {
3016 spin_unlock_bh(&cmd
->r2t_lock
);
3020 if (cmd
->cmd_flags
& ICF_SENT_LAST_R2T
)
3023 spin_unlock_bh(&cmd
->r2t_lock
);
3028 static int iscsit_send_status(
3029 struct iscsi_cmd
*cmd
,
3030 struct iscsi_conn
*conn
)
3032 u8 iov_count
= 0, recovery
;
3033 u32 padding
= 0, tx_size
= 0;
3034 struct iscsi_scsi_rsp
*hdr
;
3037 recovery
= (cmd
->i_state
!= ISTATE_SEND_STATUS
);
3039 cmd
->stat_sn
= conn
->stat_sn
++;
3041 spin_lock_bh(&conn
->sess
->session_stats_lock
);
3042 conn
->sess
->rsp_pdus
++;
3043 spin_unlock_bh(&conn
->sess
->session_stats_lock
);
3045 hdr
= (struct iscsi_scsi_rsp
*) cmd
->pdu
;
3046 memset(hdr
, 0, ISCSI_HDR_LEN
);
3047 hdr
->opcode
= ISCSI_OP_SCSI_CMD_RSP
;
3048 hdr
->flags
|= ISCSI_FLAG_CMD_FINAL
;
3049 if (cmd
->se_cmd
.se_cmd_flags
& SCF_OVERFLOW_BIT
) {
3050 hdr
->flags
|= ISCSI_FLAG_CMD_OVERFLOW
;
3051 hdr
->residual_count
= cpu_to_be32(cmd
->se_cmd
.residual_count
);
3052 } else if (cmd
->se_cmd
.se_cmd_flags
& SCF_UNDERFLOW_BIT
) {
3053 hdr
->flags
|= ISCSI_FLAG_CMD_UNDERFLOW
;
3054 hdr
->residual_count
= cpu_to_be32(cmd
->se_cmd
.residual_count
);
3056 hdr
->response
= cmd
->iscsi_response
;
3057 hdr
->cmd_status
= cmd
->se_cmd
.scsi_status
;
3058 hdr
->itt
= cmd
->init_task_tag
;
3059 hdr
->statsn
= cpu_to_be32(cmd
->stat_sn
);
3061 iscsit_increment_maxcmdsn(cmd
, conn
->sess
);
3062 hdr
->exp_cmdsn
= cpu_to_be32(conn
->sess
->exp_cmd_sn
);
3063 hdr
->max_cmdsn
= cpu_to_be32(conn
->sess
->max_cmd_sn
);
3065 iov
= &cmd
->iov_misc
[0];
3066 iov
[iov_count
].iov_base
= cmd
->pdu
;
3067 iov
[iov_count
++].iov_len
= ISCSI_HDR_LEN
;
3068 tx_size
+= ISCSI_HDR_LEN
;
3071 * Attach SENSE DATA payload to iSCSI Response PDU
3073 if (cmd
->se_cmd
.sense_buffer
&&
3074 ((cmd
->se_cmd
.se_cmd_flags
& SCF_TRANSPORT_TASK_SENSE
) ||
3075 (cmd
->se_cmd
.se_cmd_flags
& SCF_EMULATED_TASK_SENSE
))) {
3076 put_unaligned_be16(cmd
->se_cmd
.scsi_sense_length
, cmd
->sense_buffer
);
3077 cmd
->se_cmd
.scsi_sense_length
+= sizeof (__be16
);
3079 padding
= -(cmd
->se_cmd
.scsi_sense_length
) & 3;
3080 hton24(hdr
->dlength
, (u32
)cmd
->se_cmd
.scsi_sense_length
);
3081 iov
[iov_count
].iov_base
= cmd
->sense_buffer
;
3082 iov
[iov_count
++].iov_len
=
3083 (cmd
->se_cmd
.scsi_sense_length
+ padding
);
3084 tx_size
+= cmd
->se_cmd
.scsi_sense_length
;
3087 memset(cmd
->sense_buffer
+
3088 cmd
->se_cmd
.scsi_sense_length
, 0, padding
);
3090 pr_debug("Adding %u bytes of padding to"
3091 " SENSE.\n", padding
);
3094 if (conn
->conn_ops
->DataDigest
) {
3095 iscsit_do_crypto_hash_buf(&conn
->conn_tx_hash
,
3097 (cmd
->se_cmd
.scsi_sense_length
+ padding
),
3098 0, NULL
, (u8
*)&cmd
->data_crc
);
3100 iov
[iov_count
].iov_base
= &cmd
->data_crc
;
3101 iov
[iov_count
++].iov_len
= ISCSI_CRC_LEN
;
3102 tx_size
+= ISCSI_CRC_LEN
;
3104 pr_debug("Attaching CRC32 DataDigest for"
3105 " SENSE, %u bytes CRC 0x%08x\n",
3106 (cmd
->se_cmd
.scsi_sense_length
+ padding
),
3110 pr_debug("Attaching SENSE DATA: %u bytes to iSCSI"
3112 cmd
->se_cmd
.scsi_sense_length
);
3115 if (conn
->conn_ops
->HeaderDigest
) {
3116 u32
*header_digest
= (u32
*)&cmd
->pdu
[ISCSI_HDR_LEN
];
3118 iscsit_do_crypto_hash_buf(&conn
->conn_tx_hash
,
3119 (unsigned char *)hdr
, ISCSI_HDR_LEN
,
3120 0, NULL
, (u8
*)header_digest
);
3122 iov
[0].iov_len
+= ISCSI_CRC_LEN
;
3123 tx_size
+= ISCSI_CRC_LEN
;
3124 pr_debug("Attaching CRC32 HeaderDigest for Response"
3125 " PDU 0x%08x\n", *header_digest
);
3128 cmd
->iov_misc_count
= iov_count
;
3129 cmd
->tx_size
= tx_size
;
3131 pr_debug("Built %sSCSI Response, ITT: 0x%08x, StatSN: 0x%08x,"
3132 " Response: 0x%02x, SAM Status: 0x%02x, CID: %hu\n",
3133 (!recovery
) ? "" : "Recovery ", cmd
->init_task_tag
,
3134 cmd
->stat_sn
, 0x00, cmd
->se_cmd
.scsi_status
, conn
->cid
);
3139 static u8
iscsit_convert_tcm_tmr_rsp(struct se_tmr_req
*se_tmr
)
3141 switch (se_tmr
->response
) {
3142 case TMR_FUNCTION_COMPLETE
:
3143 return ISCSI_TMF_RSP_COMPLETE
;
3144 case TMR_TASK_DOES_NOT_EXIST
:
3145 return ISCSI_TMF_RSP_NO_TASK
;
3146 case TMR_LUN_DOES_NOT_EXIST
:
3147 return ISCSI_TMF_RSP_NO_LUN
;
3148 case TMR_TASK_MGMT_FUNCTION_NOT_SUPPORTED
:
3149 return ISCSI_TMF_RSP_NOT_SUPPORTED
;
3150 case TMR_FUNCTION_AUTHORIZATION_FAILED
:
3151 return ISCSI_TMF_RSP_AUTH_FAILED
;
3152 case TMR_FUNCTION_REJECTED
:
3154 return ISCSI_TMF_RSP_REJECTED
;
3158 static int iscsit_send_task_mgt_rsp(
3159 struct iscsi_cmd
*cmd
,
3160 struct iscsi_conn
*conn
)
3162 struct se_tmr_req
*se_tmr
= cmd
->se_cmd
.se_tmr_req
;
3163 struct iscsi_tm_rsp
*hdr
;
3166 hdr
= (struct iscsi_tm_rsp
*) cmd
->pdu
;
3167 memset(hdr
, 0, ISCSI_HDR_LEN
);
3168 hdr
->opcode
= ISCSI_OP_SCSI_TMFUNC_RSP
;
3169 hdr
->flags
= ISCSI_FLAG_CMD_FINAL
;
3170 hdr
->response
= iscsit_convert_tcm_tmr_rsp(se_tmr
);
3171 hdr
->itt
= cmd
->init_task_tag
;
3172 cmd
->stat_sn
= conn
->stat_sn
++;
3173 hdr
->statsn
= cpu_to_be32(cmd
->stat_sn
);
3175 iscsit_increment_maxcmdsn(cmd
, conn
->sess
);
3176 hdr
->exp_cmdsn
= cpu_to_be32(conn
->sess
->exp_cmd_sn
);
3177 hdr
->max_cmdsn
= cpu_to_be32(conn
->sess
->max_cmd_sn
);
3179 cmd
->iov_misc
[0].iov_base
= cmd
->pdu
;
3180 cmd
->iov_misc
[0].iov_len
= ISCSI_HDR_LEN
;
3181 tx_size
+= ISCSI_HDR_LEN
;
3183 if (conn
->conn_ops
->HeaderDigest
) {
3184 u32
*header_digest
= (u32
*)&cmd
->pdu
[ISCSI_HDR_LEN
];
3186 iscsit_do_crypto_hash_buf(&conn
->conn_tx_hash
,
3187 (unsigned char *)hdr
, ISCSI_HDR_LEN
,
3188 0, NULL
, (u8
*)header_digest
);
3190 cmd
->iov_misc
[0].iov_len
+= ISCSI_CRC_LEN
;
3191 tx_size
+= ISCSI_CRC_LEN
;
3192 pr_debug("Attaching CRC32 HeaderDigest for Task"
3193 " Mgmt Response PDU 0x%08x\n", *header_digest
);
3196 cmd
->iov_misc_count
= 1;
3197 cmd
->tx_size
= tx_size
;
3199 pr_debug("Built Task Management Response ITT: 0x%08x,"
3200 " StatSN: 0x%08x, Response: 0x%02x, CID: %hu\n",
3201 cmd
->init_task_tag
, cmd
->stat_sn
, hdr
->response
, conn
->cid
);
3206 static bool iscsit_check_inaddr_any(struct iscsi_np
*np
)
3210 if (np
->np_sockaddr
.ss_family
== AF_INET6
) {
3211 const struct sockaddr_in6 sin6
= {
3212 .sin6_addr
= IN6ADDR_ANY_INIT
};
3213 struct sockaddr_in6
*sock_in6
=
3214 (struct sockaddr_in6
*)&np
->np_sockaddr
;
3216 if (!memcmp(sock_in6
->sin6_addr
.s6_addr
,
3217 sin6
.sin6_addr
.s6_addr
, 16))
3220 struct sockaddr_in
* sock_in
=
3221 (struct sockaddr_in
*)&np
->np_sockaddr
;
3223 if (sock_in
->sin_addr
.s_addr
== htonl(INADDR_ANY
))
3230 #define SENDTARGETS_BUF_LIMIT 32768U
3232 static int iscsit_build_sendtargets_response(struct iscsi_cmd
*cmd
)
3234 char *payload
= NULL
;
3235 struct iscsi_conn
*conn
= cmd
->conn
;
3236 struct iscsi_portal_group
*tpg
;
3237 struct iscsi_tiqn
*tiqn
;
3238 struct iscsi_tpg_np
*tpg_np
;
3239 int buffer_len
, end_of_buf
= 0, len
= 0, payload_len
= 0;
3240 unsigned char buf
[ISCSI_IQN_LEN
+12]; /* iqn + "TargetName=" + \0 */
3242 buffer_len
= max(conn
->conn_ops
->MaxRecvDataSegmentLength
,
3243 SENDTARGETS_BUF_LIMIT
);
3245 payload
= kzalloc(buffer_len
, GFP_KERNEL
);
3247 pr_err("Unable to allocate memory for sendtargets"
3252 spin_lock(&tiqn_lock
);
3253 list_for_each_entry(tiqn
, &g_tiqn_list
, tiqn_list
) {
3254 len
= sprintf(buf
, "TargetName=%s", tiqn
->tiqn
);
3257 if ((len
+ payload_len
) > buffer_len
) {
3261 memcpy(payload
+ payload_len
, buf
, len
);
3264 spin_lock(&tiqn
->tiqn_tpg_lock
);
3265 list_for_each_entry(tpg
, &tiqn
->tiqn_tpg_list
, tpg_list
) {
3267 spin_lock(&tpg
->tpg_state_lock
);
3268 if ((tpg
->tpg_state
== TPG_STATE_FREE
) ||
3269 (tpg
->tpg_state
== TPG_STATE_INACTIVE
)) {
3270 spin_unlock(&tpg
->tpg_state_lock
);
3273 spin_unlock(&tpg
->tpg_state_lock
);
3275 spin_lock(&tpg
->tpg_np_lock
);
3276 list_for_each_entry(tpg_np
, &tpg
->tpg_gnp_list
,
3278 struct iscsi_np
*np
= tpg_np
->tpg_np
;
3279 bool inaddr_any
= iscsit_check_inaddr_any(np
);
3281 len
= sprintf(buf
, "TargetAddress="
3283 (np
->np_sockaddr
.ss_family
== AF_INET6
) ?
3284 "[" : "", (inaddr_any
== false) ?
3285 np
->np_ip
: conn
->local_ip
,
3286 (np
->np_sockaddr
.ss_family
== AF_INET6
) ?
3287 "]" : "", (inaddr_any
== false) ?
3288 np
->np_port
: conn
->local_port
,
3292 if ((len
+ payload_len
) > buffer_len
) {
3293 spin_unlock(&tpg
->tpg_np_lock
);
3294 spin_unlock(&tiqn
->tiqn_tpg_lock
);
3298 memcpy(payload
+ payload_len
, buf
, len
);
3301 spin_unlock(&tpg
->tpg_np_lock
);
3303 spin_unlock(&tiqn
->tiqn_tpg_lock
);
3308 spin_unlock(&tiqn_lock
);
3310 cmd
->buf_ptr
= payload
;
3316 * FIXME: Add support for F_BIT and C_BIT when the length is longer than
3317 * MaxRecvDataSegmentLength.
3319 static int iscsit_send_text_rsp(
3320 struct iscsi_cmd
*cmd
,
3321 struct iscsi_conn
*conn
)
3323 struct iscsi_text_rsp
*hdr
;
3325 u32 padding
= 0, tx_size
= 0;
3326 int text_length
, iov_count
= 0;
3328 text_length
= iscsit_build_sendtargets_response(cmd
);
3329 if (text_length
< 0)
3332 padding
= ((-text_length
) & 3);
3334 memset(cmd
->buf_ptr
+ text_length
, 0, padding
);
3335 pr_debug("Attaching %u additional bytes for"
3336 " padding.\n", padding
);
3339 hdr
= (struct iscsi_text_rsp
*) cmd
->pdu
;
3340 memset(hdr
, 0, ISCSI_HDR_LEN
);
3341 hdr
->opcode
= ISCSI_OP_TEXT_RSP
;
3342 hdr
->flags
|= ISCSI_FLAG_CMD_FINAL
;
3343 hton24(hdr
->dlength
, text_length
);
3344 hdr
->itt
= cmd
->init_task_tag
;
3345 hdr
->ttt
= cpu_to_be32(cmd
->targ_xfer_tag
);
3346 cmd
->stat_sn
= conn
->stat_sn
++;
3347 hdr
->statsn
= cpu_to_be32(cmd
->stat_sn
);
3349 iscsit_increment_maxcmdsn(cmd
, conn
->sess
);
3350 hdr
->exp_cmdsn
= cpu_to_be32(conn
->sess
->exp_cmd_sn
);
3351 hdr
->max_cmdsn
= cpu_to_be32(conn
->sess
->max_cmd_sn
);
3353 iov
= &cmd
->iov_misc
[0];
3355 iov
[iov_count
].iov_base
= cmd
->pdu
;
3356 iov
[iov_count
++].iov_len
= ISCSI_HDR_LEN
;
3357 iov
[iov_count
].iov_base
= cmd
->buf_ptr
;
3358 iov
[iov_count
++].iov_len
= text_length
+ padding
;
3360 tx_size
+= (ISCSI_HDR_LEN
+ text_length
+ padding
);
3362 if (conn
->conn_ops
->HeaderDigest
) {
3363 u32
*header_digest
= (u32
*)&cmd
->pdu
[ISCSI_HDR_LEN
];
3365 iscsit_do_crypto_hash_buf(&conn
->conn_tx_hash
,
3366 (unsigned char *)hdr
, ISCSI_HDR_LEN
,
3367 0, NULL
, (u8
*)header_digest
);
3369 iov
[0].iov_len
+= ISCSI_CRC_LEN
;
3370 tx_size
+= ISCSI_CRC_LEN
;
3371 pr_debug("Attaching CRC32 HeaderDigest for"
3372 " Text Response PDU 0x%08x\n", *header_digest
);
3375 if (conn
->conn_ops
->DataDigest
) {
3376 iscsit_do_crypto_hash_buf(&conn
->conn_tx_hash
,
3377 cmd
->buf_ptr
, (text_length
+ padding
),
3378 0, NULL
, (u8
*)&cmd
->data_crc
);
3380 iov
[iov_count
].iov_base
= &cmd
->data_crc
;
3381 iov
[iov_count
++].iov_len
= ISCSI_CRC_LEN
;
3382 tx_size
+= ISCSI_CRC_LEN
;
3384 pr_debug("Attaching DataDigest for %u bytes of text"
3385 " data, CRC 0x%08x\n", (text_length
+ padding
),
3389 cmd
->iov_misc_count
= iov_count
;
3390 cmd
->tx_size
= tx_size
;
3392 pr_debug("Built Text Response: ITT: 0x%08x, StatSN: 0x%08x,"
3393 " Length: %u, CID: %hu\n", cmd
->init_task_tag
, cmd
->stat_sn
,
3394 text_length
, conn
->cid
);
3398 static int iscsit_send_reject(
3399 struct iscsi_cmd
*cmd
,
3400 struct iscsi_conn
*conn
)
3402 u32 iov_count
= 0, tx_size
= 0;
3403 struct iscsi_reject
*hdr
;
3406 hdr
= (struct iscsi_reject
*) cmd
->pdu
;
3407 hdr
->opcode
= ISCSI_OP_REJECT
;
3408 hdr
->flags
|= ISCSI_FLAG_CMD_FINAL
;
3409 hton24(hdr
->dlength
, ISCSI_HDR_LEN
);
3410 hdr
->ffffffff
= cpu_to_be32(0xffffffff);
3411 cmd
->stat_sn
= conn
->stat_sn
++;
3412 hdr
->statsn
= cpu_to_be32(cmd
->stat_sn
);
3413 hdr
->exp_cmdsn
= cpu_to_be32(conn
->sess
->exp_cmd_sn
);
3414 hdr
->max_cmdsn
= cpu_to_be32(conn
->sess
->max_cmd_sn
);
3416 iov
= &cmd
->iov_misc
[0];
3418 iov
[iov_count
].iov_base
= cmd
->pdu
;
3419 iov
[iov_count
++].iov_len
= ISCSI_HDR_LEN
;
3420 iov
[iov_count
].iov_base
= cmd
->buf_ptr
;
3421 iov
[iov_count
++].iov_len
= ISCSI_HDR_LEN
;
3423 tx_size
= (ISCSI_HDR_LEN
+ ISCSI_HDR_LEN
);
3425 if (conn
->conn_ops
->HeaderDigest
) {
3426 u32
*header_digest
= (u32
*)&cmd
->pdu
[ISCSI_HDR_LEN
];
3428 iscsit_do_crypto_hash_buf(&conn
->conn_tx_hash
,
3429 (unsigned char *)hdr
, ISCSI_HDR_LEN
,
3430 0, NULL
, (u8
*)header_digest
);
3432 iov
[0].iov_len
+= ISCSI_CRC_LEN
;
3433 tx_size
+= ISCSI_CRC_LEN
;
3434 pr_debug("Attaching CRC32 HeaderDigest for"
3435 " REJECT PDU 0x%08x\n", *header_digest
);
3438 if (conn
->conn_ops
->DataDigest
) {
3439 iscsit_do_crypto_hash_buf(&conn
->conn_tx_hash
,
3440 (unsigned char *)cmd
->buf_ptr
, ISCSI_HDR_LEN
,
3441 0, NULL
, (u8
*)&cmd
->data_crc
);
3443 iov
[iov_count
].iov_base
= &cmd
->data_crc
;
3444 iov
[iov_count
++].iov_len
= ISCSI_CRC_LEN
;
3445 tx_size
+= ISCSI_CRC_LEN
;
3446 pr_debug("Attaching CRC32 DataDigest for REJECT"
3447 " PDU 0x%08x\n", cmd
->data_crc
);
3450 cmd
->iov_misc_count
= iov_count
;
3451 cmd
->tx_size
= tx_size
;
3453 pr_debug("Built Reject PDU StatSN: 0x%08x, Reason: 0x%02x,"
3454 " CID: %hu\n", ntohl(hdr
->statsn
), hdr
->reason
, conn
->cid
);
3459 void iscsit_thread_get_cpumask(struct iscsi_conn
*conn
)
3461 struct iscsi_thread_set
*ts
= conn
->thread_set
;
3464 * thread_id is assigned from iscsit_global->ts_bitmap from
3465 * within iscsi_thread_set.c:iscsi_allocate_thread_sets()
3467 * Here we use thread_id to determine which CPU that this
3468 * iSCSI connection's iscsi_thread_set will be scheduled to
3471 ord
= ts
->thread_id
% cpumask_weight(cpu_online_mask
);
3472 for_each_online_cpu(cpu
) {
3474 cpumask_set_cpu(cpu
, conn
->conn_cpumask
);
3479 * This should never be reached..
3482 cpumask_setall(conn
->conn_cpumask
);
3485 static inline void iscsit_thread_check_cpumask(
3486 struct iscsi_conn
*conn
,
3487 struct task_struct
*p
,
3492 * mode == 1 signals iscsi_target_tx_thread() usage.
3493 * mode == 0 signals iscsi_target_rx_thread() usage.
3496 if (!conn
->conn_tx_reset_cpumask
)
3498 conn
->conn_tx_reset_cpumask
= 0;
3500 if (!conn
->conn_rx_reset_cpumask
)
3502 conn
->conn_rx_reset_cpumask
= 0;
3505 * Update the CPU mask for this single kthread so that
3506 * both TX and RX kthreads are scheduled to run on the
3509 memset(buf
, 0, 128);
3510 cpumask_scnprintf(buf
, 128, conn
->conn_cpumask
);
3511 set_cpus_allowed_ptr(p
, conn
->conn_cpumask
);
3514 static int handle_immediate_queue(struct iscsi_conn
*conn
)
3516 struct iscsi_queue_req
*qr
;
3517 struct iscsi_cmd
*cmd
;
3521 while ((qr
= iscsit_get_cmd_from_immediate_queue(conn
))) {
3522 atomic_set(&conn
->check_immediate_queue
, 0);
3525 kmem_cache_free(lio_qr_cache
, qr
);
3528 case ISTATE_SEND_R2T
:
3529 ret
= iscsit_send_r2t(cmd
, conn
);
3534 if (cmd
->data_direction
== DMA_TO_DEVICE
)
3535 iscsit_stop_dataout_timer(cmd
);
3537 spin_lock_bh(&conn
->cmd_lock
);
3538 list_del(&cmd
->i_conn_node
);
3539 spin_unlock_bh(&conn
->cmd_lock
);
3541 iscsit_free_cmd(cmd
);
3543 case ISTATE_SEND_NOPIN_WANT_RESPONSE
:
3544 iscsit_mod_nopin_response_timer(conn
);
3545 ret
= iscsit_send_unsolicited_nopin(cmd
,
3550 case ISTATE_SEND_NOPIN_NO_RESPONSE
:
3551 ret
= iscsit_send_unsolicited_nopin(cmd
,
3557 pr_err("Unknown Opcode: 0x%02x ITT:"
3558 " 0x%08x, i_state: %d on CID: %hu\n",
3559 cmd
->iscsi_opcode
, cmd
->init_task_tag
, state
,
3571 static int handle_response_queue(struct iscsi_conn
*conn
)
3573 struct iscsi_queue_req
*qr
;
3574 struct iscsi_cmd
*cmd
;
3578 while ((qr
= iscsit_get_cmd_from_response_queue(conn
))) {
3581 kmem_cache_free(lio_qr_cache
, qr
);
3585 case ISTATE_SEND_DATAIN
:
3586 ret
= iscsit_send_data_in(cmd
, conn
);
3591 goto check_rsp_state
;
3592 else if (ret
== 1) {
3594 spin_lock_bh(&cmd
->istate_lock
);
3595 cmd
->i_state
= ISTATE_SENT_STATUS
;
3596 spin_unlock_bh(&cmd
->istate_lock
);
3598 } else if (ret
== 2) {
3599 /* Still must send status,
3600 SCF_TRANSPORT_TASK_SENSE was set */
3601 spin_lock_bh(&cmd
->istate_lock
);
3602 cmd
->i_state
= ISTATE_SEND_STATUS
;
3603 spin_unlock_bh(&cmd
->istate_lock
);
3604 state
= ISTATE_SEND_STATUS
;
3605 goto check_rsp_state
;
3609 case ISTATE_SEND_STATUS
:
3610 case ISTATE_SEND_STATUS_RECOVERY
:
3611 ret
= iscsit_send_status(cmd
, conn
);
3613 case ISTATE_SEND_LOGOUTRSP
:
3614 ret
= iscsit_send_logout_response(cmd
, conn
);
3616 case ISTATE_SEND_ASYNCMSG
:
3617 ret
= iscsit_send_conn_drop_async_message(
3620 case ISTATE_SEND_NOPIN
:
3621 ret
= iscsit_send_nopin_response(cmd
, conn
);
3623 case ISTATE_SEND_REJECT
:
3624 ret
= iscsit_send_reject(cmd
, conn
);
3626 case ISTATE_SEND_TASKMGTRSP
:
3627 ret
= iscsit_send_task_mgt_rsp(cmd
, conn
);
3630 ret
= iscsit_tmr_post_handler(cmd
, conn
);
3632 iscsit_fall_back_to_erl0(conn
->sess
);
3634 case ISTATE_SEND_TEXTRSP
:
3635 ret
= iscsit_send_text_rsp(cmd
, conn
);
3638 pr_err("Unknown Opcode: 0x%02x ITT:"
3639 " 0x%08x, i_state: %d on CID: %hu\n",
3640 cmd
->iscsi_opcode
, cmd
->init_task_tag
,
3647 if (iscsit_send_tx_data(cmd
, conn
, 1) < 0) {
3648 iscsit_tx_thread_wait_for_tcp(conn
);
3649 iscsit_unmap_iovec(cmd
);
3652 iscsit_unmap_iovec(cmd
);
3655 case ISTATE_SEND_LOGOUTRSP
:
3656 if (!iscsit_logout_post_handler(cmd
, conn
))
3659 case ISTATE_SEND_STATUS
:
3660 case ISTATE_SEND_ASYNCMSG
:
3661 case ISTATE_SEND_NOPIN
:
3662 case ISTATE_SEND_STATUS_RECOVERY
:
3663 case ISTATE_SEND_TEXTRSP
:
3664 case ISTATE_SEND_TASKMGTRSP
:
3665 spin_lock_bh(&cmd
->istate_lock
);
3666 cmd
->i_state
= ISTATE_SENT_STATUS
;
3667 spin_unlock_bh(&cmd
->istate_lock
);
3669 case ISTATE_SEND_REJECT
:
3670 if (cmd
->cmd_flags
& ICF_REJECT_FAIL_CONN
) {
3671 cmd
->cmd_flags
&= ~ICF_REJECT_FAIL_CONN
;
3672 complete(&cmd
->reject_comp
);
3675 complete(&cmd
->reject_comp
);
3678 pr_err("Unknown Opcode: 0x%02x ITT:"
3679 " 0x%08x, i_state: %d on CID: %hu\n",
3680 cmd
->iscsi_opcode
, cmd
->init_task_tag
,
3681 cmd
->i_state
, conn
->cid
);
3685 if (atomic_read(&conn
->check_immediate_queue
))
3697 int iscsi_target_tx_thread(void *arg
)
3700 struct iscsi_conn
*conn
;
3701 struct iscsi_thread_set
*ts
= arg
;
3703 * Allow ourselves to be interrupted by SIGINT so that a
3704 * connection recovery / failure event can be triggered externally.
3706 allow_signal(SIGINT
);
3709 conn
= iscsi_tx_thread_pre_handler(ts
);
3715 while (!kthread_should_stop()) {
3717 * Ensure that both TX and RX per connection kthreads
3718 * are scheduled to run on the same CPU.
3720 iscsit_thread_check_cpumask(conn
, current
, 1);
3722 schedule_timeout_interruptible(MAX_SCHEDULE_TIMEOUT
);
3724 if ((ts
->status
== ISCSI_THREAD_SET_RESET
) ||
3725 signal_pending(current
))
3728 ret
= handle_immediate_queue(conn
);
3732 ret
= handle_response_queue(conn
);
3740 iscsit_take_action_for_connection_exit(conn
);
3746 int iscsi_target_rx_thread(void *arg
)
3749 u8 buffer
[ISCSI_HDR_LEN
], opcode
;
3750 u32 checksum
= 0, digest
= 0;
3751 struct iscsi_conn
*conn
= NULL
;
3752 struct iscsi_thread_set
*ts
= arg
;
3755 * Allow ourselves to be interrupted by SIGINT so that a
3756 * connection recovery / failure event can be triggered externally.
3758 allow_signal(SIGINT
);
3761 conn
= iscsi_rx_thread_pre_handler(ts
);
3765 while (!kthread_should_stop()) {
3767 * Ensure that both TX and RX per connection kthreads
3768 * are scheduled to run on the same CPU.
3770 iscsit_thread_check_cpumask(conn
, current
, 0);
3772 memset(buffer
, 0, ISCSI_HDR_LEN
);
3773 memset(&iov
, 0, sizeof(struct kvec
));
3775 iov
.iov_base
= buffer
;
3776 iov
.iov_len
= ISCSI_HDR_LEN
;
3778 ret
= rx_data(conn
, &iov
, 1, ISCSI_HDR_LEN
);
3779 if (ret
!= ISCSI_HDR_LEN
) {
3780 iscsit_rx_thread_wait_for_tcp(conn
);
3785 * Set conn->bad_hdr for use with REJECT PDUs.
3787 memcpy(&conn
->bad_hdr
, &buffer
, ISCSI_HDR_LEN
);
3789 if (conn
->conn_ops
->HeaderDigest
) {
3790 iov
.iov_base
= &digest
;
3791 iov
.iov_len
= ISCSI_CRC_LEN
;
3793 ret
= rx_data(conn
, &iov
, 1, ISCSI_CRC_LEN
);
3794 if (ret
!= ISCSI_CRC_LEN
) {
3795 iscsit_rx_thread_wait_for_tcp(conn
);
3799 iscsit_do_crypto_hash_buf(&conn
->conn_rx_hash
,
3800 buffer
, ISCSI_HDR_LEN
,
3801 0, NULL
, (u8
*)&checksum
);
3803 if (digest
!= checksum
) {
3804 pr_err("HeaderDigest CRC32C failed,"
3805 " received 0x%08x, computed 0x%08x\n",
3808 * Set the PDU to 0xff so it will intentionally
3809 * hit default in the switch below.
3811 memset(buffer
, 0xff, ISCSI_HDR_LEN
);
3812 spin_lock_bh(&conn
->sess
->session_stats_lock
);
3813 conn
->sess
->conn_digest_errors
++;
3814 spin_unlock_bh(&conn
->sess
->session_stats_lock
);
3816 pr_debug("Got HeaderDigest CRC32C"
3817 " 0x%08x\n", checksum
);
3821 if (conn
->conn_state
== TARG_CONN_STATE_IN_LOGOUT
)
3824 opcode
= buffer
[0] & ISCSI_OPCODE_MASK
;
3826 if (conn
->sess
->sess_ops
->SessionType
&&
3827 ((!(opcode
& ISCSI_OP_TEXT
)) ||
3828 (!(opcode
& ISCSI_OP_LOGOUT
)))) {
3829 pr_err("Received illegal iSCSI Opcode: 0x%02x"
3830 " while in Discovery Session, rejecting.\n", opcode
);
3831 iscsit_add_reject(ISCSI_REASON_PROTOCOL_ERROR
, 1,
3837 case ISCSI_OP_SCSI_CMD
:
3838 if (iscsit_handle_scsi_cmd(conn
, buffer
) < 0)
3841 case ISCSI_OP_SCSI_DATA_OUT
:
3842 if (iscsit_handle_data_out(conn
, buffer
) < 0)
3845 case ISCSI_OP_NOOP_OUT
:
3846 if (iscsit_handle_nop_out(conn
, buffer
) < 0)
3849 case ISCSI_OP_SCSI_TMFUNC
:
3850 if (iscsit_handle_task_mgt_cmd(conn
, buffer
) < 0)
3854 if (iscsit_handle_text_cmd(conn
, buffer
) < 0)
3857 case ISCSI_OP_LOGOUT
:
3858 ret
= iscsit_handle_logout_cmd(conn
, buffer
);
3860 wait_for_completion_timeout(&conn
->conn_logout_comp
,
3861 SECONDS_FOR_LOGOUT_COMP
* HZ
);
3866 case ISCSI_OP_SNACK
:
3867 if (iscsit_handle_snack(conn
, buffer
) < 0)
3871 pr_err("Got unknown iSCSI OpCode: 0x%02x\n",
3873 if (!conn
->sess
->sess_ops
->ErrorRecoveryLevel
) {
3874 pr_err("Cannot recover from unknown"
3875 " opcode while ERL=0, closing iSCSI connection"
3879 if (!conn
->conn_ops
->OFMarker
) {
3880 pr_err("Unable to recover from unknown"
3881 " opcode while OFMarker=No, closing iSCSI"
3885 if (iscsit_recover_from_unknown_opcode(conn
) < 0) {
3886 pr_err("Unable to recover from unknown"
3887 " opcode, closing iSCSI connection.\n");
3895 if (!signal_pending(current
))
3896 atomic_set(&conn
->transport_failed
, 1);
3897 iscsit_take_action_for_connection_exit(conn
);
3903 static void iscsit_release_commands_from_conn(struct iscsi_conn
*conn
)
3905 struct iscsi_cmd
*cmd
= NULL
, *cmd_tmp
= NULL
;
3906 struct iscsi_session
*sess
= conn
->sess
;
3908 * We expect this function to only ever be called from either RX or TX
3909 * thread context via iscsit_close_connection() once the other context
3910 * has been reset -> returned sleeping pre-handler state.
3912 spin_lock_bh(&conn
->cmd_lock
);
3913 list_for_each_entry_safe(cmd
, cmd_tmp
, &conn
->conn_cmd_list
, i_conn_node
) {
3915 list_del(&cmd
->i_conn_node
);
3916 spin_unlock_bh(&conn
->cmd_lock
);
3918 iscsit_increment_maxcmdsn(cmd
, sess
);
3920 iscsit_free_cmd(cmd
);
3922 spin_lock_bh(&conn
->cmd_lock
);
3924 spin_unlock_bh(&conn
->cmd_lock
);
3927 static void iscsit_stop_timers_for_cmds(
3928 struct iscsi_conn
*conn
)
3930 struct iscsi_cmd
*cmd
;
3932 spin_lock_bh(&conn
->cmd_lock
);
3933 list_for_each_entry(cmd
, &conn
->conn_cmd_list
, i_conn_node
) {
3934 if (cmd
->data_direction
== DMA_TO_DEVICE
)
3935 iscsit_stop_dataout_timer(cmd
);
3937 spin_unlock_bh(&conn
->cmd_lock
);
3940 int iscsit_close_connection(
3941 struct iscsi_conn
*conn
)
3943 int conn_logout
= (conn
->conn_state
== TARG_CONN_STATE_IN_LOGOUT
);
3944 struct iscsi_session
*sess
= conn
->sess
;
3946 pr_debug("Closing iSCSI connection CID %hu on SID:"
3947 " %u\n", conn
->cid
, sess
->sid
);
3949 * Always up conn_logout_comp just in case the RX Thread is sleeping
3950 * and the logout response never got sent because the connection
3953 complete(&conn
->conn_logout_comp
);
3955 iscsi_release_thread_set(conn
);
3957 iscsit_stop_timers_for_cmds(conn
);
3958 iscsit_stop_nopin_response_timer(conn
);
3959 iscsit_stop_nopin_timer(conn
);
3960 iscsit_free_queue_reqs_for_conn(conn
);
3963 * During Connection recovery drop unacknowledged out of order
3964 * commands for this connection, and prepare the other commands
3967 * During normal operation clear the out of order commands (but
3968 * do not free the struct iscsi_ooo_cmdsn's) and release all
3969 * struct iscsi_cmds.
3971 if (atomic_read(&conn
->connection_recovery
)) {
3972 iscsit_discard_unacknowledged_ooo_cmdsns_for_conn(conn
);
3973 iscsit_prepare_cmds_for_realligance(conn
);
3975 iscsit_clear_ooo_cmdsns_for_conn(conn
);
3976 iscsit_release_commands_from_conn(conn
);
3980 * Handle decrementing session or connection usage count if
3981 * a logout response was not able to be sent because the
3982 * connection failed. Fall back to Session Recovery here.
3984 if (atomic_read(&conn
->conn_logout_remove
)) {
3985 if (conn
->conn_logout_reason
== ISCSI_LOGOUT_REASON_CLOSE_SESSION
) {
3986 iscsit_dec_conn_usage_count(conn
);
3987 iscsit_dec_session_usage_count(sess
);
3989 if (conn
->conn_logout_reason
== ISCSI_LOGOUT_REASON_CLOSE_CONNECTION
)
3990 iscsit_dec_conn_usage_count(conn
);
3992 atomic_set(&conn
->conn_logout_remove
, 0);
3993 atomic_set(&sess
->session_reinstatement
, 0);
3994 atomic_set(&sess
->session_fall_back_to_erl0
, 1);
3997 spin_lock_bh(&sess
->conn_lock
);
3998 list_del(&conn
->conn_list
);
4001 * Attempt to let the Initiator know this connection failed by
4002 * sending an Connection Dropped Async Message on another
4003 * active connection.
4005 if (atomic_read(&conn
->connection_recovery
))
4006 iscsit_build_conn_drop_async_message(conn
);
4008 spin_unlock_bh(&sess
->conn_lock
);
4011 * If connection reinstatement is being performed on this connection,
4012 * up the connection reinstatement semaphore that is being blocked on
4013 * in iscsit_cause_connection_reinstatement().
4015 spin_lock_bh(&conn
->state_lock
);
4016 if (atomic_read(&conn
->sleep_on_conn_wait_comp
)) {
4017 spin_unlock_bh(&conn
->state_lock
);
4018 complete(&conn
->conn_wait_comp
);
4019 wait_for_completion(&conn
->conn_post_wait_comp
);
4020 spin_lock_bh(&conn
->state_lock
);
4024 * If connection reinstatement is being performed on this connection
4025 * by receiving a REMOVECONNFORRECOVERY logout request, up the
4026 * connection wait rcfr semaphore that is being blocked on
4027 * an iscsit_connection_reinstatement_rcfr().
4029 if (atomic_read(&conn
->connection_wait_rcfr
)) {
4030 spin_unlock_bh(&conn
->state_lock
);
4031 complete(&conn
->conn_wait_rcfr_comp
);
4032 wait_for_completion(&conn
->conn_post_wait_comp
);
4033 spin_lock_bh(&conn
->state_lock
);
4035 atomic_set(&conn
->connection_reinstatement
, 1);
4036 spin_unlock_bh(&conn
->state_lock
);
4039 * If any other processes are accessing this connection pointer we
4040 * must wait until they have completed.
4042 iscsit_check_conn_usage_count(conn
);
4044 if (conn
->conn_rx_hash
.tfm
)
4045 crypto_free_hash(conn
->conn_rx_hash
.tfm
);
4046 if (conn
->conn_tx_hash
.tfm
)
4047 crypto_free_hash(conn
->conn_tx_hash
.tfm
);
4049 if (conn
->conn_cpumask
)
4050 free_cpumask_var(conn
->conn_cpumask
);
4052 kfree(conn
->conn_ops
);
4053 conn
->conn_ops
= NULL
;
4056 sock_release(conn
->sock
);
4057 conn
->thread_set
= NULL
;
4059 pr_debug("Moving to TARG_CONN_STATE_FREE.\n");
4060 conn
->conn_state
= TARG_CONN_STATE_FREE
;
4063 spin_lock_bh(&sess
->conn_lock
);
4064 atomic_dec(&sess
->nconn
);
4065 pr_debug("Decremented iSCSI connection count to %hu from node:"
4066 " %s\n", atomic_read(&sess
->nconn
),
4067 sess
->sess_ops
->InitiatorName
);
4069 * Make sure that if one connection fails in an non ERL=2 iSCSI
4070 * Session that they all fail.
4072 if ((sess
->sess_ops
->ErrorRecoveryLevel
!= 2) && !conn_logout
&&
4073 !atomic_read(&sess
->session_logout
))
4074 atomic_set(&sess
->session_fall_back_to_erl0
, 1);
4077 * If this was not the last connection in the session, and we are
4078 * performing session reinstatement or falling back to ERL=0, call
4079 * iscsit_stop_session() without sleeping to shutdown the other
4080 * active connections.
4082 if (atomic_read(&sess
->nconn
)) {
4083 if (!atomic_read(&sess
->session_reinstatement
) &&
4084 !atomic_read(&sess
->session_fall_back_to_erl0
)) {
4085 spin_unlock_bh(&sess
->conn_lock
);
4088 if (!atomic_read(&sess
->session_stop_active
)) {
4089 atomic_set(&sess
->session_stop_active
, 1);
4090 spin_unlock_bh(&sess
->conn_lock
);
4091 iscsit_stop_session(sess
, 0, 0);
4094 spin_unlock_bh(&sess
->conn_lock
);
4099 * If this was the last connection in the session and one of the
4100 * following is occurring:
4102 * Session Reinstatement is not being performed, and are falling back
4103 * to ERL=0 call iscsit_close_session().
4105 * Session Logout was requested. iscsit_close_session() will be called
4108 * Session Continuation is not being performed, start the Time2Retain
4109 * handler and check if sleep_on_sess_wait_sem is active.
4111 if (!atomic_read(&sess
->session_reinstatement
) &&
4112 atomic_read(&sess
->session_fall_back_to_erl0
)) {
4113 spin_unlock_bh(&sess
->conn_lock
);
4114 target_put_session(sess
->se_sess
);
4117 } else if (atomic_read(&sess
->session_logout
)) {
4118 pr_debug("Moving to TARG_SESS_STATE_FREE.\n");
4119 sess
->session_state
= TARG_SESS_STATE_FREE
;
4120 spin_unlock_bh(&sess
->conn_lock
);
4122 if (atomic_read(&sess
->sleep_on_sess_wait_comp
))
4123 complete(&sess
->session_wait_comp
);
4127 pr_debug("Moving to TARG_SESS_STATE_FAILED.\n");
4128 sess
->session_state
= TARG_SESS_STATE_FAILED
;
4130 if (!atomic_read(&sess
->session_continuation
)) {
4131 spin_unlock_bh(&sess
->conn_lock
);
4132 iscsit_start_time2retain_handler(sess
);
4134 spin_unlock_bh(&sess
->conn_lock
);
4136 if (atomic_read(&sess
->sleep_on_sess_wait_comp
))
4137 complete(&sess
->session_wait_comp
);
4141 spin_unlock_bh(&sess
->conn_lock
);
4146 int iscsit_close_session(struct iscsi_session
*sess
)
4148 struct iscsi_portal_group
*tpg
= ISCSI_TPG_S(sess
);
4149 struct se_portal_group
*se_tpg
= &tpg
->tpg_se_tpg
;
4151 if (atomic_read(&sess
->nconn
)) {
4152 pr_err("%d connection(s) still exist for iSCSI session"
4153 " to %s\n", atomic_read(&sess
->nconn
),
4154 sess
->sess_ops
->InitiatorName
);
4158 spin_lock_bh(&se_tpg
->session_lock
);
4159 atomic_set(&sess
->session_logout
, 1);
4160 atomic_set(&sess
->session_reinstatement
, 1);
4161 iscsit_stop_time2retain_timer(sess
);
4162 spin_unlock_bh(&se_tpg
->session_lock
);
4165 * transport_deregister_session_configfs() will clear the
4166 * struct se_node_acl->nacl_sess pointer now as a iscsi_np process context
4167 * can be setting it again with __transport_register_session() in
4168 * iscsi_post_login_handler() again after the iscsit_stop_session()
4169 * completes in iscsi_np context.
4171 transport_deregister_session_configfs(sess
->se_sess
);
4174 * If any other processes are accessing this session pointer we must
4175 * wait until they have completed. If we are in an interrupt (the
4176 * time2retain handler) and contain and active session usage count we
4177 * restart the timer and exit.
4179 if (!in_interrupt()) {
4180 if (iscsit_check_session_usage_count(sess
) == 1)
4181 iscsit_stop_session(sess
, 1, 1);
4183 if (iscsit_check_session_usage_count(sess
) == 2) {
4184 atomic_set(&sess
->session_logout
, 0);
4185 iscsit_start_time2retain_handler(sess
);
4190 transport_deregister_session(sess
->se_sess
);
4192 if (sess
->sess_ops
->ErrorRecoveryLevel
== 2)
4193 iscsit_free_connection_recovery_entires(sess
);
4195 iscsit_free_all_ooo_cmdsns(sess
);
4197 spin_lock_bh(&se_tpg
->session_lock
);
4198 pr_debug("Moving to TARG_SESS_STATE_FREE.\n");
4199 sess
->session_state
= TARG_SESS_STATE_FREE
;
4200 pr_debug("Released iSCSI session from node: %s\n",
4201 sess
->sess_ops
->InitiatorName
);
4204 tpg
->tpg_tiqn
->tiqn_nsessions
--;
4206 pr_debug("Decremented number of active iSCSI Sessions on"
4207 " iSCSI TPG: %hu to %u\n", tpg
->tpgt
, tpg
->nsessions
);
4209 spin_lock(&sess_idr_lock
);
4210 idr_remove(&sess_idr
, sess
->session_index
);
4211 spin_unlock(&sess_idr_lock
);
4213 kfree(sess
->sess_ops
);
4214 sess
->sess_ops
= NULL
;
4215 spin_unlock_bh(&se_tpg
->session_lock
);
4221 static void iscsit_logout_post_handler_closesession(
4222 struct iscsi_conn
*conn
)
4224 struct iscsi_session
*sess
= conn
->sess
;
4226 iscsi_set_thread_clear(conn
, ISCSI_CLEAR_TX_THREAD
);
4227 iscsi_set_thread_set_signal(conn
, ISCSI_SIGNAL_TX_THREAD
);
4229 atomic_set(&conn
->conn_logout_remove
, 0);
4230 complete(&conn
->conn_logout_comp
);
4232 iscsit_dec_conn_usage_count(conn
);
4233 iscsit_stop_session(sess
, 1, 1);
4234 iscsit_dec_session_usage_count(sess
);
4235 target_put_session(sess
->se_sess
);
4238 static void iscsit_logout_post_handler_samecid(
4239 struct iscsi_conn
*conn
)
4241 iscsi_set_thread_clear(conn
, ISCSI_CLEAR_TX_THREAD
);
4242 iscsi_set_thread_set_signal(conn
, ISCSI_SIGNAL_TX_THREAD
);
4244 atomic_set(&conn
->conn_logout_remove
, 0);
4245 complete(&conn
->conn_logout_comp
);
4247 iscsit_cause_connection_reinstatement(conn
, 1);
4248 iscsit_dec_conn_usage_count(conn
);
4251 static void iscsit_logout_post_handler_diffcid(
4252 struct iscsi_conn
*conn
,
4255 struct iscsi_conn
*l_conn
;
4256 struct iscsi_session
*sess
= conn
->sess
;
4261 spin_lock_bh(&sess
->conn_lock
);
4262 list_for_each_entry(l_conn
, &sess
->sess_conn_list
, conn_list
) {
4263 if (l_conn
->cid
== cid
) {
4264 iscsit_inc_conn_usage_count(l_conn
);
4268 spin_unlock_bh(&sess
->conn_lock
);
4274 l_conn
->sock
->ops
->shutdown(l_conn
->sock
, RCV_SHUTDOWN
);
4276 spin_lock_bh(&l_conn
->state_lock
);
4277 pr_debug("Moving to TARG_CONN_STATE_IN_LOGOUT.\n");
4278 l_conn
->conn_state
= TARG_CONN_STATE_IN_LOGOUT
;
4279 spin_unlock_bh(&l_conn
->state_lock
);
4281 iscsit_cause_connection_reinstatement(l_conn
, 1);
4282 iscsit_dec_conn_usage_count(l_conn
);
4286 * Return of 0 causes the TX thread to restart.
4288 static int iscsit_logout_post_handler(
4289 struct iscsi_cmd
*cmd
,
4290 struct iscsi_conn
*conn
)
4294 switch (cmd
->logout_reason
) {
4295 case ISCSI_LOGOUT_REASON_CLOSE_SESSION
:
4296 switch (cmd
->logout_response
) {
4297 case ISCSI_LOGOUT_SUCCESS
:
4298 case ISCSI_LOGOUT_CLEANUP_FAILED
:
4300 iscsit_logout_post_handler_closesession(conn
);
4305 case ISCSI_LOGOUT_REASON_CLOSE_CONNECTION
:
4306 if (conn
->cid
== cmd
->logout_cid
) {
4307 switch (cmd
->logout_response
) {
4308 case ISCSI_LOGOUT_SUCCESS
:
4309 case ISCSI_LOGOUT_CLEANUP_FAILED
:
4311 iscsit_logout_post_handler_samecid(conn
);
4316 switch (cmd
->logout_response
) {
4317 case ISCSI_LOGOUT_SUCCESS
:
4318 iscsit_logout_post_handler_diffcid(conn
,
4321 case ISCSI_LOGOUT_CID_NOT_FOUND
:
4322 case ISCSI_LOGOUT_CLEANUP_FAILED
:
4329 case ISCSI_LOGOUT_REASON_RECOVERY
:
4330 switch (cmd
->logout_response
) {
4331 case ISCSI_LOGOUT_SUCCESS
:
4332 case ISCSI_LOGOUT_CID_NOT_FOUND
:
4333 case ISCSI_LOGOUT_RECOVERY_UNSUPPORTED
:
4334 case ISCSI_LOGOUT_CLEANUP_FAILED
:
4347 void iscsit_fail_session(struct iscsi_session
*sess
)
4349 struct iscsi_conn
*conn
;
4351 spin_lock_bh(&sess
->conn_lock
);
4352 list_for_each_entry(conn
, &sess
->sess_conn_list
, conn_list
) {
4353 pr_debug("Moving to TARG_CONN_STATE_CLEANUP_WAIT.\n");
4354 conn
->conn_state
= TARG_CONN_STATE_CLEANUP_WAIT
;
4356 spin_unlock_bh(&sess
->conn_lock
);
4358 pr_debug("Moving to TARG_SESS_STATE_FAILED.\n");
4359 sess
->session_state
= TARG_SESS_STATE_FAILED
;
4362 int iscsit_free_session(struct iscsi_session
*sess
)
4364 u16 conn_count
= atomic_read(&sess
->nconn
);
4365 struct iscsi_conn
*conn
, *conn_tmp
= NULL
;
4368 spin_lock_bh(&sess
->conn_lock
);
4369 atomic_set(&sess
->sleep_on_sess_wait_comp
, 1);
4371 list_for_each_entry_safe(conn
, conn_tmp
, &sess
->sess_conn_list
,
4373 if (conn_count
== 0)
4376 if (list_is_last(&conn
->conn_list
, &sess
->sess_conn_list
)) {
4379 iscsit_inc_conn_usage_count(conn_tmp
);
4382 iscsit_inc_conn_usage_count(conn
);
4384 spin_unlock_bh(&sess
->conn_lock
);
4385 iscsit_cause_connection_reinstatement(conn
, 1);
4386 spin_lock_bh(&sess
->conn_lock
);
4388 iscsit_dec_conn_usage_count(conn
);
4390 iscsit_dec_conn_usage_count(conn_tmp
);
4395 if (atomic_read(&sess
->nconn
)) {
4396 spin_unlock_bh(&sess
->conn_lock
);
4397 wait_for_completion(&sess
->session_wait_comp
);
4399 spin_unlock_bh(&sess
->conn_lock
);
4401 target_put_session(sess
->se_sess
);
4405 void iscsit_stop_session(
4406 struct iscsi_session
*sess
,
4408 int connection_sleep
)
4410 u16 conn_count
= atomic_read(&sess
->nconn
);
4411 struct iscsi_conn
*conn
, *conn_tmp
= NULL
;
4414 spin_lock_bh(&sess
->conn_lock
);
4416 atomic_set(&sess
->sleep_on_sess_wait_comp
, 1);
4418 if (connection_sleep
) {
4419 list_for_each_entry_safe(conn
, conn_tmp
, &sess
->sess_conn_list
,
4421 if (conn_count
== 0)
4424 if (list_is_last(&conn
->conn_list
, &sess
->sess_conn_list
)) {
4427 iscsit_inc_conn_usage_count(conn_tmp
);
4430 iscsit_inc_conn_usage_count(conn
);
4432 spin_unlock_bh(&sess
->conn_lock
);
4433 iscsit_cause_connection_reinstatement(conn
, 1);
4434 spin_lock_bh(&sess
->conn_lock
);
4436 iscsit_dec_conn_usage_count(conn
);
4438 iscsit_dec_conn_usage_count(conn_tmp
);
4442 list_for_each_entry(conn
, &sess
->sess_conn_list
, conn_list
)
4443 iscsit_cause_connection_reinstatement(conn
, 0);
4446 if (session_sleep
&& atomic_read(&sess
->nconn
)) {
4447 spin_unlock_bh(&sess
->conn_lock
);
4448 wait_for_completion(&sess
->session_wait_comp
);
4450 spin_unlock_bh(&sess
->conn_lock
);
4453 int iscsit_release_sessions_for_tpg(struct iscsi_portal_group
*tpg
, int force
)
4455 struct iscsi_session
*sess
;
4456 struct se_portal_group
*se_tpg
= &tpg
->tpg_se_tpg
;
4457 struct se_session
*se_sess
, *se_sess_tmp
;
4458 int session_count
= 0;
4460 spin_lock_bh(&se_tpg
->session_lock
);
4461 if (tpg
->nsessions
&& !force
) {
4462 spin_unlock_bh(&se_tpg
->session_lock
);
4466 list_for_each_entry_safe(se_sess
, se_sess_tmp
, &se_tpg
->tpg_sess_list
,
4468 sess
= (struct iscsi_session
*)se_sess
->fabric_sess_ptr
;
4470 spin_lock(&sess
->conn_lock
);
4471 if (atomic_read(&sess
->session_fall_back_to_erl0
) ||
4472 atomic_read(&sess
->session_logout
) ||
4473 (sess
->time2retain_timer_flags
& ISCSI_TF_EXPIRED
)) {
4474 spin_unlock(&sess
->conn_lock
);
4477 atomic_set(&sess
->session_reinstatement
, 1);
4478 spin_unlock(&sess
->conn_lock
);
4479 spin_unlock_bh(&se_tpg
->session_lock
);
4481 iscsit_free_session(sess
);
4482 spin_lock_bh(&se_tpg
->session_lock
);
4486 spin_unlock_bh(&se_tpg
->session_lock
);
4488 pr_debug("Released %d iSCSI Session(s) from Target Portal"
4489 " Group: %hu\n", session_count
, tpg
->tpgt
);
4493 MODULE_DESCRIPTION("iSCSI-Target Driver for mainline target infrastructure");
4494 MODULE_VERSION("4.1.x");
4495 MODULE_AUTHOR("nab@Linux-iSCSI.org");
4496 MODULE_LICENSE("GPL");
4498 module_init(iscsi_target_init_module
);
4499 module_exit(iscsi_target_cleanup_module
);