1 /*******************************************************************************
2 * This file contains main functions related to the iSCSI Target Core Driver.
4 * \u00a9 Copyright 2007-2011 RisingTide Systems LLC.
6 * Licensed to the Linux Foundation under the General Public License (GPL) version 2.
8 * Author: Nicholas A. Bellinger <nab@linux-iscsi.org>
10 * This program is free software; you can redistribute it and/or modify
11 * it under the terms of the GNU General Public License as published by
12 * the Free Software Foundation; either version 2 of the License, or
13 * (at your option) any later version.
15 * This program is distributed in the hope that it will be useful,
16 * but WITHOUT ANY WARRANTY; without even the implied warranty of
17 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
18 * GNU General Public License for more details.
19 ******************************************************************************/
21 #include <linux/string.h>
22 #include <linux/kthread.h>
23 #include <linux/crypto.h>
24 #include <linux/completion.h>
25 #include <linux/module.h>
26 #include <asm/unaligned.h>
27 #include <scsi/scsi_device.h>
28 #include <scsi/iscsi_proto.h>
29 #include <target/target_core_base.h>
30 #include <target/target_core_fabric.h>
32 #include "iscsi_target_core.h"
33 #include "iscsi_target_parameters.h"
34 #include "iscsi_target_seq_pdu_list.h"
35 #include "iscsi_target_tq.h"
36 #include "iscsi_target_configfs.h"
37 #include "iscsi_target_datain_values.h"
38 #include "iscsi_target_erl0.h"
39 #include "iscsi_target_erl1.h"
40 #include "iscsi_target_erl2.h"
41 #include "iscsi_target_login.h"
42 #include "iscsi_target_tmr.h"
43 #include "iscsi_target_tpg.h"
44 #include "iscsi_target_util.h"
45 #include "iscsi_target.h"
46 #include "iscsi_target_device.h"
47 #include "iscsi_target_stat.h"
49 static LIST_HEAD(g_tiqn_list
);
50 static LIST_HEAD(g_np_list
);
51 static DEFINE_SPINLOCK(tiqn_lock
);
52 static DEFINE_SPINLOCK(np_lock
);
54 static struct idr tiqn_idr
;
56 struct mutex auth_id_lock
;
57 spinlock_t sess_idr_lock
;
59 struct iscsit_global
*iscsit_global
;
61 struct kmem_cache
*lio_cmd_cache
;
62 struct kmem_cache
*lio_qr_cache
;
63 struct kmem_cache
*lio_dr_cache
;
64 struct kmem_cache
*lio_ooo_cache
;
65 struct kmem_cache
*lio_r2t_cache
;
67 static int iscsit_handle_immediate_data(struct iscsi_cmd
*,
68 unsigned char *buf
, u32
);
69 static int iscsit_logout_post_handler(struct iscsi_cmd
*, struct iscsi_conn
*);
71 struct iscsi_tiqn
*iscsit_get_tiqn_for_login(unsigned char *buf
)
73 struct iscsi_tiqn
*tiqn
= NULL
;
75 spin_lock(&tiqn_lock
);
76 list_for_each_entry(tiqn
, &g_tiqn_list
, tiqn_list
) {
77 if (!strcmp(tiqn
->tiqn
, buf
)) {
79 spin_lock(&tiqn
->tiqn_state_lock
);
80 if (tiqn
->tiqn_state
== TIQN_STATE_ACTIVE
) {
81 tiqn
->tiqn_access_count
++;
82 spin_unlock(&tiqn
->tiqn_state_lock
);
83 spin_unlock(&tiqn_lock
);
86 spin_unlock(&tiqn
->tiqn_state_lock
);
89 spin_unlock(&tiqn_lock
);
94 static int iscsit_set_tiqn_shutdown(struct iscsi_tiqn
*tiqn
)
96 spin_lock(&tiqn
->tiqn_state_lock
);
97 if (tiqn
->tiqn_state
== TIQN_STATE_ACTIVE
) {
98 tiqn
->tiqn_state
= TIQN_STATE_SHUTDOWN
;
99 spin_unlock(&tiqn
->tiqn_state_lock
);
102 spin_unlock(&tiqn
->tiqn_state_lock
);
107 void iscsit_put_tiqn_for_login(struct iscsi_tiqn
*tiqn
)
109 spin_lock(&tiqn
->tiqn_state_lock
);
110 tiqn
->tiqn_access_count
--;
111 spin_unlock(&tiqn
->tiqn_state_lock
);
115 * Note that IQN formatting is expected to be done in userspace, and
116 * no explict IQN format checks are done here.
118 struct iscsi_tiqn
*iscsit_add_tiqn(unsigned char *buf
)
120 struct iscsi_tiqn
*tiqn
= NULL
;
123 if (strlen(buf
) >= ISCSI_IQN_LEN
) {
124 pr_err("Target IQN exceeds %d bytes\n",
126 return ERR_PTR(-EINVAL
);
129 tiqn
= kzalloc(sizeof(struct iscsi_tiqn
), GFP_KERNEL
);
131 pr_err("Unable to allocate struct iscsi_tiqn\n");
132 return ERR_PTR(-ENOMEM
);
135 sprintf(tiqn
->tiqn
, "%s", buf
);
136 INIT_LIST_HEAD(&tiqn
->tiqn_list
);
137 INIT_LIST_HEAD(&tiqn
->tiqn_tpg_list
);
138 spin_lock_init(&tiqn
->tiqn_state_lock
);
139 spin_lock_init(&tiqn
->tiqn_tpg_lock
);
140 spin_lock_init(&tiqn
->sess_err_stats
.lock
);
141 spin_lock_init(&tiqn
->login_stats
.lock
);
142 spin_lock_init(&tiqn
->logout_stats
.lock
);
144 if (!idr_pre_get(&tiqn_idr
, GFP_KERNEL
)) {
145 pr_err("idr_pre_get() for tiqn_idr failed\n");
147 return ERR_PTR(-ENOMEM
);
149 tiqn
->tiqn_state
= TIQN_STATE_ACTIVE
;
151 spin_lock(&tiqn_lock
);
152 ret
= idr_get_new(&tiqn_idr
, NULL
, &tiqn
->tiqn_index
);
154 pr_err("idr_get_new() failed for tiqn->tiqn_index\n");
155 spin_unlock(&tiqn_lock
);
159 list_add_tail(&tiqn
->tiqn_list
, &g_tiqn_list
);
160 spin_unlock(&tiqn_lock
);
162 pr_debug("CORE[0] - Added iSCSI Target IQN: %s\n", tiqn
->tiqn
);
168 static void iscsit_wait_for_tiqn(struct iscsi_tiqn
*tiqn
)
171 * Wait for accesses to said struct iscsi_tiqn to end.
173 spin_lock(&tiqn
->tiqn_state_lock
);
174 while (tiqn
->tiqn_access_count
!= 0) {
175 spin_unlock(&tiqn
->tiqn_state_lock
);
177 spin_lock(&tiqn
->tiqn_state_lock
);
179 spin_unlock(&tiqn
->tiqn_state_lock
);
182 void iscsit_del_tiqn(struct iscsi_tiqn
*tiqn
)
185 * iscsit_set_tiqn_shutdown sets tiqn->tiqn_state = TIQN_STATE_SHUTDOWN
186 * while holding tiqn->tiqn_state_lock. This means that all subsequent
187 * attempts to access this struct iscsi_tiqn will fail from both transport
188 * fabric and control code paths.
190 if (iscsit_set_tiqn_shutdown(tiqn
) < 0) {
191 pr_err("iscsit_set_tiqn_shutdown() failed\n");
195 iscsit_wait_for_tiqn(tiqn
);
197 spin_lock(&tiqn_lock
);
198 list_del(&tiqn
->tiqn_list
);
199 idr_remove(&tiqn_idr
, tiqn
->tiqn_index
);
200 spin_unlock(&tiqn_lock
);
202 pr_debug("CORE[0] - Deleted iSCSI Target IQN: %s\n",
207 int iscsit_access_np(struct iscsi_np
*np
, struct iscsi_portal_group
*tpg
)
211 * Determine if the network portal is accepting storage traffic.
213 spin_lock_bh(&np
->np_thread_lock
);
214 if (np
->np_thread_state
!= ISCSI_NP_THREAD_ACTIVE
) {
215 spin_unlock_bh(&np
->np_thread_lock
);
218 if (np
->np_login_tpg
) {
219 pr_err("np->np_login_tpg() is not NULL!\n");
220 spin_unlock_bh(&np
->np_thread_lock
);
223 spin_unlock_bh(&np
->np_thread_lock
);
225 * Determine if the portal group is accepting storage traffic.
227 spin_lock_bh(&tpg
->tpg_state_lock
);
228 if (tpg
->tpg_state
!= TPG_STATE_ACTIVE
) {
229 spin_unlock_bh(&tpg
->tpg_state_lock
);
232 spin_unlock_bh(&tpg
->tpg_state_lock
);
235 * Here we serialize access across the TIQN+TPG Tuple.
237 ret
= mutex_lock_interruptible(&tpg
->np_login_lock
);
238 if ((ret
!= 0) || signal_pending(current
))
241 spin_lock_bh(&np
->np_thread_lock
);
242 np
->np_login_tpg
= tpg
;
243 spin_unlock_bh(&np
->np_thread_lock
);
248 int iscsit_deaccess_np(struct iscsi_np
*np
, struct iscsi_portal_group
*tpg
)
250 struct iscsi_tiqn
*tiqn
= tpg
->tpg_tiqn
;
252 spin_lock_bh(&np
->np_thread_lock
);
253 np
->np_login_tpg
= NULL
;
254 spin_unlock_bh(&np
->np_thread_lock
);
256 mutex_unlock(&tpg
->np_login_lock
);
259 iscsit_put_tiqn_for_login(tiqn
);
264 static struct iscsi_np
*iscsit_get_np(
265 struct __kernel_sockaddr_storage
*sockaddr
,
266 int network_transport
)
268 struct sockaddr_in
*sock_in
, *sock_in_e
;
269 struct sockaddr_in6
*sock_in6
, *sock_in6_e
;
274 spin_lock_bh(&np_lock
);
275 list_for_each_entry(np
, &g_np_list
, np_list
) {
276 spin_lock(&np
->np_thread_lock
);
277 if (np
->np_thread_state
!= ISCSI_NP_THREAD_ACTIVE
) {
278 spin_unlock(&np
->np_thread_lock
);
282 if (sockaddr
->ss_family
== AF_INET6
) {
283 sock_in6
= (struct sockaddr_in6
*)sockaddr
;
284 sock_in6_e
= (struct sockaddr_in6
*)&np
->np_sockaddr
;
286 if (!memcmp((void *)&sock_in6
->sin6_addr
.in6_u
,
287 (void *)&sock_in6_e
->sin6_addr
.in6_u
,
288 sizeof(struct in6_addr
)))
291 port
= ntohs(sock_in6
->sin6_port
);
293 sock_in
= (struct sockaddr_in
*)sockaddr
;
294 sock_in_e
= (struct sockaddr_in
*)&np
->np_sockaddr
;
296 if (sock_in
->sin_addr
.s_addr
==
297 sock_in_e
->sin_addr
.s_addr
)
300 port
= ntohs(sock_in
->sin_port
);
303 if ((ip_match
== 1) && (np
->np_port
== port
) &&
304 (np
->np_network_transport
== network_transport
)) {
306 * Increment the np_exports reference count now to
307 * prevent iscsit_del_np() below from being called
308 * while iscsi_tpg_add_network_portal() is called.
311 spin_unlock(&np
->np_thread_lock
);
312 spin_unlock_bh(&np_lock
);
315 spin_unlock(&np
->np_thread_lock
);
317 spin_unlock_bh(&np_lock
);
322 struct iscsi_np
*iscsit_add_np(
323 struct __kernel_sockaddr_storage
*sockaddr
,
325 int network_transport
)
327 struct sockaddr_in
*sock_in
;
328 struct sockaddr_in6
*sock_in6
;
332 * Locate the existing struct iscsi_np if already active..
334 np
= iscsit_get_np(sockaddr
, network_transport
);
338 np
= kzalloc(sizeof(struct iscsi_np
), GFP_KERNEL
);
340 pr_err("Unable to allocate memory for struct iscsi_np\n");
341 return ERR_PTR(-ENOMEM
);
344 np
->np_flags
|= NPF_IP_NETWORK
;
345 if (sockaddr
->ss_family
== AF_INET6
) {
346 sock_in6
= (struct sockaddr_in6
*)sockaddr
;
347 snprintf(np
->np_ip
, IPV6_ADDRESS_SPACE
, "%s", ip_str
);
348 np
->np_port
= ntohs(sock_in6
->sin6_port
);
350 sock_in
= (struct sockaddr_in
*)sockaddr
;
351 sprintf(np
->np_ip
, "%s", ip_str
);
352 np
->np_port
= ntohs(sock_in
->sin_port
);
355 np
->np_network_transport
= network_transport
;
356 spin_lock_init(&np
->np_thread_lock
);
357 init_completion(&np
->np_restart_comp
);
358 INIT_LIST_HEAD(&np
->np_list
);
360 ret
= iscsi_target_setup_login_socket(np
, sockaddr
);
366 np
->np_thread
= kthread_run(iscsi_target_login_thread
, np
, "iscsi_np");
367 if (IS_ERR(np
->np_thread
)) {
368 pr_err("Unable to create kthread: iscsi_np\n");
369 ret
= PTR_ERR(np
->np_thread
);
374 * Increment the np_exports reference count now to prevent
375 * iscsit_del_np() below from being run while a new call to
376 * iscsi_tpg_add_network_portal() for a matching iscsi_np is
377 * active. We don't need to hold np->np_thread_lock at this
378 * point because iscsi_np has not been added to g_np_list yet.
382 spin_lock_bh(&np_lock
);
383 list_add_tail(&np
->np_list
, &g_np_list
);
384 spin_unlock_bh(&np_lock
);
386 pr_debug("CORE[0] - Added Network Portal: %s:%hu on %s\n",
387 np
->np_ip
, np
->np_port
, (np
->np_network_transport
== ISCSI_TCP
) ?
393 int iscsit_reset_np_thread(
395 struct iscsi_tpg_np
*tpg_np
,
396 struct iscsi_portal_group
*tpg
)
398 spin_lock_bh(&np
->np_thread_lock
);
401 * The reset operation need only be performed when the
402 * passed struct iscsi_portal_group has a login in progress
403 * to one of the network portals.
405 if (tpg_np
->tpg_np
->np_login_tpg
!= tpg
) {
406 spin_unlock_bh(&np
->np_thread_lock
);
410 if (np
->np_thread_state
== ISCSI_NP_THREAD_INACTIVE
) {
411 spin_unlock_bh(&np
->np_thread_lock
);
414 np
->np_thread_state
= ISCSI_NP_THREAD_RESET
;
417 spin_unlock_bh(&np
->np_thread_lock
);
418 send_sig(SIGINT
, np
->np_thread
, 1);
419 wait_for_completion(&np
->np_restart_comp
);
420 spin_lock_bh(&np
->np_thread_lock
);
422 spin_unlock_bh(&np
->np_thread_lock
);
427 int iscsit_del_np_comm(struct iscsi_np
*np
)
433 * Some network transports allocate their own struct sock->file,
434 * see if we need to free any additional allocated resources.
436 if (np
->np_flags
& NPF_SCTP_STRUCT_FILE
) {
437 kfree(np
->np_socket
->file
);
438 np
->np_socket
->file
= NULL
;
441 sock_release(np
->np_socket
);
445 int iscsit_del_np(struct iscsi_np
*np
)
447 spin_lock_bh(&np
->np_thread_lock
);
449 if (np
->np_exports
) {
450 spin_unlock_bh(&np
->np_thread_lock
);
453 np
->np_thread_state
= ISCSI_NP_THREAD_SHUTDOWN
;
454 spin_unlock_bh(&np
->np_thread_lock
);
458 * We need to send the signal to wakeup Linux/Net
459 * which may be sleeping in sock_accept()..
461 send_sig(SIGINT
, np
->np_thread
, 1);
462 kthread_stop(np
->np_thread
);
464 iscsit_del_np_comm(np
);
466 spin_lock_bh(&np_lock
);
467 list_del(&np
->np_list
);
468 spin_unlock_bh(&np_lock
);
470 pr_debug("CORE[0] - Removed Network Portal: %s:%hu on %s\n",
471 np
->np_ip
, np
->np_port
, (np
->np_network_transport
== ISCSI_TCP
) ?
478 static int __init
iscsi_target_init_module(void)
482 pr_debug("iSCSI-Target "ISCSIT_VERSION
"\n");
484 iscsit_global
= kzalloc(sizeof(struct iscsit_global
), GFP_KERNEL
);
485 if (!iscsit_global
) {
486 pr_err("Unable to allocate memory for iscsit_global\n");
489 mutex_init(&auth_id_lock
);
490 spin_lock_init(&sess_idr_lock
);
494 ret
= iscsi_target_register_configfs();
498 ret
= iscsi_thread_set_init();
502 if (iscsi_allocate_thread_sets(TARGET_THREAD_SET_COUNT
) !=
503 TARGET_THREAD_SET_COUNT
) {
504 pr_err("iscsi_allocate_thread_sets() returned"
505 " unexpected value!\n");
509 lio_cmd_cache
= kmem_cache_create("lio_cmd_cache",
510 sizeof(struct iscsi_cmd
), __alignof__(struct iscsi_cmd
),
512 if (!lio_cmd_cache
) {
513 pr_err("Unable to kmem_cache_create() for"
518 lio_qr_cache
= kmem_cache_create("lio_qr_cache",
519 sizeof(struct iscsi_queue_req
),
520 __alignof__(struct iscsi_queue_req
), 0, NULL
);
522 pr_err("nable to kmem_cache_create() for"
527 lio_dr_cache
= kmem_cache_create("lio_dr_cache",
528 sizeof(struct iscsi_datain_req
),
529 __alignof__(struct iscsi_datain_req
), 0, NULL
);
531 pr_err("Unable to kmem_cache_create() for"
536 lio_ooo_cache
= kmem_cache_create("lio_ooo_cache",
537 sizeof(struct iscsi_ooo_cmdsn
),
538 __alignof__(struct iscsi_ooo_cmdsn
), 0, NULL
);
539 if (!lio_ooo_cache
) {
540 pr_err("Unable to kmem_cache_create() for"
545 lio_r2t_cache
= kmem_cache_create("lio_r2t_cache",
546 sizeof(struct iscsi_r2t
), __alignof__(struct iscsi_r2t
),
548 if (!lio_r2t_cache
) {
549 pr_err("Unable to kmem_cache_create() for"
554 if (iscsit_load_discovery_tpg() < 0)
559 kmem_cache_destroy(lio_r2t_cache
);
561 kmem_cache_destroy(lio_ooo_cache
);
563 kmem_cache_destroy(lio_dr_cache
);
565 kmem_cache_destroy(lio_qr_cache
);
567 kmem_cache_destroy(lio_cmd_cache
);
569 iscsi_deallocate_thread_sets();
571 iscsi_thread_set_free();
573 iscsi_target_deregister_configfs();
575 kfree(iscsit_global
);
579 static void __exit
iscsi_target_cleanup_module(void)
581 iscsi_deallocate_thread_sets();
582 iscsi_thread_set_free();
583 iscsit_release_discovery_tpg();
584 kmem_cache_destroy(lio_cmd_cache
);
585 kmem_cache_destroy(lio_qr_cache
);
586 kmem_cache_destroy(lio_dr_cache
);
587 kmem_cache_destroy(lio_ooo_cache
);
588 kmem_cache_destroy(lio_r2t_cache
);
590 iscsi_target_deregister_configfs();
592 kfree(iscsit_global
);
595 int iscsit_add_reject(
599 struct iscsi_conn
*conn
)
601 struct iscsi_cmd
*cmd
;
602 struct iscsi_reject
*hdr
;
605 cmd
= iscsit_allocate_cmd(conn
, GFP_KERNEL
);
609 cmd
->iscsi_opcode
= ISCSI_OP_REJECT
;
611 cmd
->cmd_flags
|= ICF_REJECT_FAIL_CONN
;
613 hdr
= (struct iscsi_reject
*) cmd
->pdu
;
614 hdr
->reason
= reason
;
616 cmd
->buf_ptr
= kmemdup(buf
, ISCSI_HDR_LEN
, GFP_KERNEL
);
618 pr_err("Unable to allocate memory for cmd->buf_ptr\n");
619 iscsit_release_cmd(cmd
);
623 spin_lock_bh(&conn
->cmd_lock
);
624 list_add_tail(&cmd
->i_list
, &conn
->conn_cmd_list
);
625 spin_unlock_bh(&conn
->cmd_lock
);
627 cmd
->i_state
= ISTATE_SEND_REJECT
;
628 iscsit_add_cmd_to_response_queue(cmd
, conn
, cmd
->i_state
);
630 ret
= wait_for_completion_interruptible(&cmd
->reject_comp
);
634 return (!fail_conn
) ? 0 : -1;
637 int iscsit_add_reject_from_cmd(
642 struct iscsi_cmd
*cmd
)
644 struct iscsi_conn
*conn
;
645 struct iscsi_reject
*hdr
;
649 pr_err("cmd->conn is NULL for ITT: 0x%08x\n",
655 cmd
->iscsi_opcode
= ISCSI_OP_REJECT
;
657 cmd
->cmd_flags
|= ICF_REJECT_FAIL_CONN
;
659 hdr
= (struct iscsi_reject
*) cmd
->pdu
;
660 hdr
->reason
= reason
;
662 cmd
->buf_ptr
= kmemdup(buf
, ISCSI_HDR_LEN
, GFP_KERNEL
);
664 pr_err("Unable to allocate memory for cmd->buf_ptr\n");
665 iscsit_release_cmd(cmd
);
670 spin_lock_bh(&conn
->cmd_lock
);
671 list_add_tail(&cmd
->i_list
, &conn
->conn_cmd_list
);
672 spin_unlock_bh(&conn
->cmd_lock
);
675 cmd
->i_state
= ISTATE_SEND_REJECT
;
676 iscsit_add_cmd_to_response_queue(cmd
, conn
, cmd
->i_state
);
678 ret
= wait_for_completion_interruptible(&cmd
->reject_comp
);
682 return (!fail_conn
) ? 0 : -1;
686 * Map some portion of the allocated scatterlist to an iovec, suitable for
687 * kernel sockets to copy data in/out. This handles both pages and slab-allocated
688 * buffers, since we have been tricky and mapped t_mem_sg to the buffer in
689 * either case (see iscsit_alloc_buffs)
691 static int iscsit_map_iovec(
692 struct iscsi_cmd
*cmd
,
698 struct scatterlist
*sg
;
699 unsigned int page_off
;
702 * We have a private mapping of the allocated pages in t_mem_sg.
703 * At this point, we also know each contains a page.
705 sg
= &cmd
->t_mem_sg
[data_offset
/ PAGE_SIZE
];
706 page_off
= (data_offset
% PAGE_SIZE
);
708 cmd
->first_data_sg
= sg
;
709 cmd
->first_data_sg_off
= page_off
;
711 while (data_length
) {
712 u32 cur_len
= min_t(u32
, data_length
, sg
->length
- page_off
);
714 iov
[i
].iov_base
= kmap(sg_page(sg
)) + sg
->offset
+ page_off
;
715 iov
[i
].iov_len
= cur_len
;
717 data_length
-= cur_len
;
723 cmd
->kmapped_nents
= i
;
728 static void iscsit_unmap_iovec(struct iscsi_cmd
*cmd
)
731 struct scatterlist
*sg
;
733 sg
= cmd
->first_data_sg
;
735 for (i
= 0; i
< cmd
->kmapped_nents
; i
++)
736 kunmap(sg_page(&sg
[i
]));
739 static void iscsit_ack_from_expstatsn(struct iscsi_conn
*conn
, u32 exp_statsn
)
741 struct iscsi_cmd
*cmd
;
743 conn
->exp_statsn
= exp_statsn
;
745 spin_lock_bh(&conn
->cmd_lock
);
746 list_for_each_entry(cmd
, &conn
->conn_cmd_list
, i_list
) {
747 spin_lock(&cmd
->istate_lock
);
748 if ((cmd
->i_state
== ISTATE_SENT_STATUS
) &&
749 (cmd
->stat_sn
< exp_statsn
)) {
750 cmd
->i_state
= ISTATE_REMOVE
;
751 spin_unlock(&cmd
->istate_lock
);
752 iscsit_add_cmd_to_immediate_queue(cmd
, conn
,
756 spin_unlock(&cmd
->istate_lock
);
758 spin_unlock_bh(&conn
->cmd_lock
);
761 static int iscsit_allocate_iovecs(struct iscsi_cmd
*cmd
)
763 u32 iov_count
= (cmd
->se_cmd
.t_data_nents
== 0) ? 1 :
764 cmd
->se_cmd
.t_data_nents
;
766 iov_count
+= ISCSI_IOV_DATA_BUFFER
;
768 cmd
->iov_data
= kzalloc(iov_count
* sizeof(struct kvec
), GFP_KERNEL
);
769 if (!cmd
->iov_data
) {
770 pr_err("Unable to allocate cmd->iov_data\n");
774 cmd
->orig_iov_data_count
= iov_count
;
778 static int iscsit_alloc_buffs(struct iscsi_cmd
*cmd
)
780 struct scatterlist
*sgl
;
781 u32 length
= cmd
->se_cmd
.data_length
;
782 int nents
= DIV_ROUND_UP(length
, PAGE_SIZE
);
785 * If no SCSI payload is present, allocate the default iovecs used for
789 return iscsit_allocate_iovecs(cmd
);
791 sgl
= kzalloc(sizeof(*sgl
) * nents
, GFP_KERNEL
);
795 sg_init_table(sgl
, nents
);
798 int buf_size
= min_t(int, length
, PAGE_SIZE
);
801 page
= alloc_page(GFP_KERNEL
| __GFP_ZERO
);
803 goto page_alloc_failed
;
805 sg_set_page(&sgl
[i
], page
, buf_size
, 0);
812 cmd
->t_mem_sg_nents
= nents
;
814 /* BIDI ops not supported */
816 /* Tell the core about our preallocated memory */
817 transport_generic_map_mem_to_cmd(&cmd
->se_cmd
, sgl
, nents
, NULL
, 0);
819 * Allocate iovecs for SCSI payload after transport_generic_map_mem_to_cmd
820 * so that cmd->se_cmd.t_tasks_se_num has been set.
822 ret
= iscsit_allocate_iovecs(cmd
);
824 goto page_alloc_failed
;
830 __free_page(sg_page(&sgl
[i
]));
833 kfree(cmd
->t_mem_sg
);
834 cmd
->t_mem_sg
= NULL
;
838 static int iscsit_handle_scsi_cmd(
839 struct iscsi_conn
*conn
,
842 int data_direction
, cmdsn_ret
= 0, immed_ret
, ret
, transport_ret
;
843 int dump_immediate_data
= 0, send_check_condition
= 0, payload_length
;
844 struct iscsi_cmd
*cmd
= NULL
;
845 struct iscsi_scsi_req
*hdr
;
847 spin_lock_bh(&conn
->sess
->session_stats_lock
);
848 conn
->sess
->cmd_pdus
++;
849 if (conn
->sess
->se_sess
->se_node_acl
) {
850 spin_lock(&conn
->sess
->se_sess
->se_node_acl
->stats_lock
);
851 conn
->sess
->se_sess
->se_node_acl
->num_cmds
++;
852 spin_unlock(&conn
->sess
->se_sess
->se_node_acl
->stats_lock
);
854 spin_unlock_bh(&conn
->sess
->session_stats_lock
);
856 hdr
= (struct iscsi_scsi_req
*) buf
;
857 payload_length
= ntoh24(hdr
->dlength
);
858 hdr
->itt
= be32_to_cpu(hdr
->itt
);
859 hdr
->data_length
= be32_to_cpu(hdr
->data_length
);
860 hdr
->cmdsn
= be32_to_cpu(hdr
->cmdsn
);
861 hdr
->exp_statsn
= be32_to_cpu(hdr
->exp_statsn
);
863 /* FIXME; Add checks for AdditionalHeaderSegment */
865 if (!(hdr
->flags
& ISCSI_FLAG_CMD_WRITE
) &&
866 !(hdr
->flags
& ISCSI_FLAG_CMD_FINAL
)) {
867 pr_err("ISCSI_FLAG_CMD_WRITE & ISCSI_FLAG_CMD_FINAL"
868 " not set. Bad iSCSI Initiator.\n");
869 return iscsit_add_reject(ISCSI_REASON_BOOKMARK_INVALID
, 1,
873 if (((hdr
->flags
& ISCSI_FLAG_CMD_READ
) ||
874 (hdr
->flags
& ISCSI_FLAG_CMD_WRITE
)) && !hdr
->data_length
) {
876 * Vmware ESX v3.0 uses a modified Cisco Initiator (v3.4.2)
877 * that adds support for RESERVE/RELEASE. There is a bug
878 * add with this new functionality that sets R/W bits when
879 * neither CDB carries any READ or WRITE datapayloads.
881 if ((hdr
->cdb
[0] == 0x16) || (hdr
->cdb
[0] == 0x17)) {
882 hdr
->flags
&= ~ISCSI_FLAG_CMD_READ
;
883 hdr
->flags
&= ~ISCSI_FLAG_CMD_WRITE
;
887 pr_err("ISCSI_FLAG_CMD_READ or ISCSI_FLAG_CMD_WRITE"
888 " set when Expected Data Transfer Length is 0 for"
889 " CDB: 0x%02x. Bad iSCSI Initiator.\n", hdr
->cdb
[0]);
890 return iscsit_add_reject(ISCSI_REASON_BOOKMARK_INVALID
, 1,
895 if (!(hdr
->flags
& ISCSI_FLAG_CMD_READ
) &&
896 !(hdr
->flags
& ISCSI_FLAG_CMD_WRITE
) && (hdr
->data_length
!= 0)) {
897 pr_err("ISCSI_FLAG_CMD_READ and/or ISCSI_FLAG_CMD_WRITE"
898 " MUST be set if Expected Data Transfer Length is not 0."
899 " Bad iSCSI Initiator\n");
900 return iscsit_add_reject(ISCSI_REASON_BOOKMARK_INVALID
, 1,
904 if ((hdr
->flags
& ISCSI_FLAG_CMD_READ
) &&
905 (hdr
->flags
& ISCSI_FLAG_CMD_WRITE
)) {
906 pr_err("Bidirectional operations not supported!\n");
907 return iscsit_add_reject(ISCSI_REASON_BOOKMARK_INVALID
, 1,
911 if (hdr
->opcode
& ISCSI_OP_IMMEDIATE
) {
912 pr_err("Illegally set Immediate Bit in iSCSI Initiator"
913 " Scsi Command PDU.\n");
914 return iscsit_add_reject(ISCSI_REASON_BOOKMARK_INVALID
, 1,
918 if (payload_length
&& !conn
->sess
->sess_ops
->ImmediateData
) {
919 pr_err("ImmediateData=No but DataSegmentLength=%u,"
920 " protocol error.\n", payload_length
);
921 return iscsit_add_reject(ISCSI_REASON_PROTOCOL_ERROR
, 1,
925 if ((hdr
->data_length
== payload_length
) &&
926 (!(hdr
->flags
& ISCSI_FLAG_CMD_FINAL
))) {
927 pr_err("Expected Data Transfer Length and Length of"
928 " Immediate Data are the same, but ISCSI_FLAG_CMD_FINAL"
929 " bit is not set protocol error\n");
930 return iscsit_add_reject(ISCSI_REASON_PROTOCOL_ERROR
, 1,
934 if (payload_length
> hdr
->data_length
) {
935 pr_err("DataSegmentLength: %u is greater than"
936 " EDTL: %u, protocol error.\n", payload_length
,
938 return iscsit_add_reject(ISCSI_REASON_PROTOCOL_ERROR
, 1,
942 if (payload_length
> conn
->conn_ops
->MaxRecvDataSegmentLength
) {
943 pr_err("DataSegmentLength: %u is greater than"
944 " MaxRecvDataSegmentLength: %u, protocol error.\n",
945 payload_length
, conn
->conn_ops
->MaxRecvDataSegmentLength
);
946 return iscsit_add_reject(ISCSI_REASON_PROTOCOL_ERROR
, 1,
950 if (payload_length
> conn
->sess
->sess_ops
->FirstBurstLength
) {
951 pr_err("DataSegmentLength: %u is greater than"
952 " FirstBurstLength: %u, protocol error.\n",
953 payload_length
, conn
->sess
->sess_ops
->FirstBurstLength
);
954 return iscsit_add_reject(ISCSI_REASON_BOOKMARK_INVALID
, 1,
958 data_direction
= (hdr
->flags
& ISCSI_FLAG_CMD_WRITE
) ? DMA_TO_DEVICE
:
959 (hdr
->flags
& ISCSI_FLAG_CMD_READ
) ? DMA_FROM_DEVICE
:
962 cmd
= iscsit_allocate_se_cmd(conn
, hdr
->data_length
, data_direction
,
963 (hdr
->flags
& ISCSI_FLAG_CMD_ATTR_MASK
));
965 return iscsit_add_reject(ISCSI_REASON_BOOKMARK_NO_RESOURCES
, 1,
968 pr_debug("Got SCSI Command, ITT: 0x%08x, CmdSN: 0x%08x,"
969 " ExpXferLen: %u, Length: %u, CID: %hu\n", hdr
->itt
,
970 hdr
->cmdsn
, hdr
->data_length
, payload_length
, conn
->cid
);
972 cmd
->iscsi_opcode
= ISCSI_OP_SCSI_CMD
;
973 cmd
->i_state
= ISTATE_NEW_CMD
;
974 cmd
->immediate_cmd
= ((hdr
->opcode
& ISCSI_OP_IMMEDIATE
) ? 1 : 0);
975 cmd
->immediate_data
= (payload_length
) ? 1 : 0;
976 cmd
->unsolicited_data
= ((!(hdr
->flags
& ISCSI_FLAG_CMD_FINAL
) &&
977 (hdr
->flags
& ISCSI_FLAG_CMD_WRITE
)) ? 1 : 0);
978 if (cmd
->unsolicited_data
)
979 cmd
->cmd_flags
|= ICF_NON_IMMEDIATE_UNSOLICITED_DATA
;
981 conn
->sess
->init_task_tag
= cmd
->init_task_tag
= hdr
->itt
;
982 if (hdr
->flags
& ISCSI_FLAG_CMD_READ
) {
983 spin_lock_bh(&conn
->sess
->ttt_lock
);
984 cmd
->targ_xfer_tag
= conn
->sess
->targ_xfer_tag
++;
985 if (cmd
->targ_xfer_tag
== 0xFFFFFFFF)
986 cmd
->targ_xfer_tag
= conn
->sess
->targ_xfer_tag
++;
987 spin_unlock_bh(&conn
->sess
->ttt_lock
);
988 } else if (hdr
->flags
& ISCSI_FLAG_CMD_WRITE
)
989 cmd
->targ_xfer_tag
= 0xFFFFFFFF;
990 cmd
->cmd_sn
= hdr
->cmdsn
;
991 cmd
->exp_stat_sn
= hdr
->exp_statsn
;
992 cmd
->first_burst_len
= payload_length
;
994 if (cmd
->data_direction
== DMA_FROM_DEVICE
) {
995 struct iscsi_datain_req
*dr
;
997 dr
= iscsit_allocate_datain_req();
999 return iscsit_add_reject_from_cmd(
1000 ISCSI_REASON_BOOKMARK_NO_RESOURCES
,
1003 iscsit_attach_datain_req(cmd
, dr
);
1007 * The CDB is going to an se_device_t.
1009 ret
= iscsit_get_lun_for_cmd(cmd
, hdr
->cdb
,
1010 get_unaligned_le64(&hdr
->lun
));
1012 if (cmd
->se_cmd
.scsi_sense_reason
== TCM_NON_EXISTENT_LUN
) {
1013 pr_debug("Responding to non-acl'ed,"
1014 " non-existent or non-exported iSCSI LUN:"
1015 " 0x%016Lx\n", get_unaligned_le64(&hdr
->lun
));
1017 send_check_condition
= 1;
1021 * The Initiator Node has access to the LUN (the addressing method
1022 * is handled inside of iscsit_get_lun_for_cmd()). Now it's time to
1023 * allocate 1->N transport tasks (depending on sector count and
1024 * maximum request size the physical HBA(s) can handle.
1026 transport_ret
= transport_generic_allocate_tasks(&cmd
->se_cmd
, hdr
->cdb
);
1027 if (transport_ret
== -ENOMEM
) {
1028 return iscsit_add_reject_from_cmd(
1029 ISCSI_REASON_BOOKMARK_NO_RESOURCES
,
1031 } else if (transport_ret
== -EINVAL
) {
1033 * Unsupported SAM Opcode. CHECK_CONDITION will be sent
1034 * in iscsit_execute_cmd() during the CmdSN OOO Execution
1037 send_check_condition
= 1;
1039 cmd
->data_length
= cmd
->se_cmd
.data_length
;
1041 if (iscsit_decide_list_to_build(cmd
, payload_length
) < 0)
1042 return iscsit_add_reject_from_cmd(
1043 ISCSI_REASON_BOOKMARK_NO_RESOURCES
,
1048 spin_lock_bh(&conn
->cmd_lock
);
1049 list_add_tail(&cmd
->i_list
, &conn
->conn_cmd_list
);
1050 spin_unlock_bh(&conn
->cmd_lock
);
1052 * Check if we need to delay processing because of ALUA
1053 * Active/NonOptimized primary access state..
1055 core_alua_check_nonop_delay(&cmd
->se_cmd
);
1057 * Allocate and setup SGL used with transport_generic_map_mem_to_cmd().
1058 * also call iscsit_allocate_iovecs()
1060 ret
= iscsit_alloc_buffs(cmd
);
1062 return iscsit_add_reject_from_cmd(
1063 ISCSI_REASON_BOOKMARK_NO_RESOURCES
,
1066 * Check the CmdSN against ExpCmdSN/MaxCmdSN here if
1067 * the Immediate Bit is not set, and no Immediate
1070 * A PDU/CmdSN carrying Immediate Data can only
1071 * be processed after the DataCRC has passed.
1072 * If the DataCRC fails, the CmdSN MUST NOT
1073 * be acknowledged. (See below)
1075 if (!cmd
->immediate_data
) {
1076 cmdsn_ret
= iscsit_sequence_cmd(conn
, cmd
, hdr
->cmdsn
);
1077 if (cmdsn_ret
== CMDSN_LOWER_THAN_EXP
)
1079 else if (cmdsn_ret
== CMDSN_ERROR_CANNOT_RECOVER
)
1080 return iscsit_add_reject_from_cmd(
1081 ISCSI_REASON_PROTOCOL_ERROR
,
1085 iscsit_ack_from_expstatsn(conn
, hdr
->exp_statsn
);
1088 * If no Immediate Data is attached, it's OK to return now.
1090 if (!cmd
->immediate_data
) {
1091 if (send_check_condition
)
1094 if (cmd
->unsolicited_data
) {
1095 iscsit_set_dataout_sequence_values(cmd
);
1097 spin_lock_bh(&cmd
->dataout_timeout_lock
);
1098 iscsit_start_dataout_timer(cmd
, cmd
->conn
);
1099 spin_unlock_bh(&cmd
->dataout_timeout_lock
);
1106 * Early CHECK_CONDITIONs never make it to the transport processing
1107 * thread. They are processed in CmdSN order by
1108 * iscsit_check_received_cmdsn() below.
1110 if (send_check_condition
) {
1111 immed_ret
= IMMEDIATE_DATA_NORMAL_OPERATION
;
1112 dump_immediate_data
= 1;
1113 goto after_immediate_data
;
1116 * Call directly into transport_generic_new_cmd() to perform
1117 * the backend memory allocation.
1119 ret
= transport_generic_new_cmd(&cmd
->se_cmd
);
1121 immed_ret
= IMMEDIATE_DATA_NORMAL_OPERATION
;
1122 dump_immediate_data
= 1;
1123 goto after_immediate_data
;
1126 immed_ret
= iscsit_handle_immediate_data(cmd
, buf
, payload_length
);
1127 after_immediate_data
:
1128 if (immed_ret
== IMMEDIATE_DATA_NORMAL_OPERATION
) {
1130 * A PDU/CmdSN carrying Immediate Data passed
1131 * DataCRC, check against ExpCmdSN/MaxCmdSN if
1132 * Immediate Bit is not set.
1134 cmdsn_ret
= iscsit_sequence_cmd(conn
, cmd
, hdr
->cmdsn
);
1136 * Special case for Unsupported SAM WRITE Opcodes
1137 * and ImmediateData=Yes.
1139 if (dump_immediate_data
) {
1140 if (iscsit_dump_data_payload(conn
, payload_length
, 1) < 0)
1142 } else if (cmd
->unsolicited_data
) {
1143 iscsit_set_dataout_sequence_values(cmd
);
1145 spin_lock_bh(&cmd
->dataout_timeout_lock
);
1146 iscsit_start_dataout_timer(cmd
, cmd
->conn
);
1147 spin_unlock_bh(&cmd
->dataout_timeout_lock
);
1150 if (cmdsn_ret
== CMDSN_ERROR_CANNOT_RECOVER
)
1151 return iscsit_add_reject_from_cmd(
1152 ISCSI_REASON_PROTOCOL_ERROR
,
1155 } else if (immed_ret
== IMMEDIATE_DATA_ERL1_CRC_FAILURE
) {
1157 * Immediate Data failed DataCRC and ERL>=1,
1158 * silently drop this PDU and let the initiator
1159 * plug the CmdSN gap.
1161 * FIXME: Send Unsolicited NOPIN with reserved
1162 * TTT here to help the initiator figure out
1163 * the missing CmdSN, although they should be
1164 * intelligent enough to determine the missing
1165 * CmdSN and issue a retry to plug the sequence.
1167 cmd
->i_state
= ISTATE_REMOVE
;
1168 iscsit_add_cmd_to_immediate_queue(cmd
, conn
, cmd
->i_state
);
1169 } else /* immed_ret == IMMEDIATE_DATA_CANNOT_RECOVER */
1175 static u32
iscsit_do_crypto_hash_sg(
1176 struct hash_desc
*hash
,
1177 struct iscsi_cmd
*cmd
,
1185 struct scatterlist
*sg
;
1186 unsigned int page_off
;
1188 crypto_hash_init(hash
);
1190 sg
= cmd
->first_data_sg
;
1191 page_off
= cmd
->first_data_sg_off
;
1194 while (data_length
) {
1195 u32 cur_len
= min_t(u32
, data_length
, (sg
[i
].length
- page_off
));
1197 crypto_hash_update(hash
, &sg
[i
], cur_len
);
1199 data_length
-= cur_len
;
1205 struct scatterlist pad_sg
;
1207 sg_init_one(&pad_sg
, pad_bytes
, padding
);
1208 crypto_hash_update(hash
, &pad_sg
, padding
);
1210 crypto_hash_final(hash
, (u8
*) &data_crc
);
1215 static void iscsit_do_crypto_hash_buf(
1216 struct hash_desc
*hash
,
1223 struct scatterlist sg
;
1225 crypto_hash_init(hash
);
1227 sg_init_one(&sg
, (u8
*)buf
, payload_length
);
1228 crypto_hash_update(hash
, &sg
, payload_length
);
1231 sg_init_one(&sg
, pad_bytes
, padding
);
1232 crypto_hash_update(hash
, &sg
, padding
);
1234 crypto_hash_final(hash
, data_crc
);
1237 static int iscsit_handle_data_out(struct iscsi_conn
*conn
, unsigned char *buf
)
1239 int iov_ret
, ooo_cmdsn
= 0, ret
;
1240 u8 data_crc_failed
= 0;
1241 u32 checksum
, iov_count
= 0, padding
= 0, rx_got
= 0;
1242 u32 rx_size
= 0, payload_length
;
1243 struct iscsi_cmd
*cmd
= NULL
;
1244 struct se_cmd
*se_cmd
;
1245 struct iscsi_data
*hdr
;
1247 unsigned long flags
;
1249 hdr
= (struct iscsi_data
*) buf
;
1250 payload_length
= ntoh24(hdr
->dlength
);
1251 hdr
->itt
= be32_to_cpu(hdr
->itt
);
1252 hdr
->ttt
= be32_to_cpu(hdr
->ttt
);
1253 hdr
->exp_statsn
= be32_to_cpu(hdr
->exp_statsn
);
1254 hdr
->datasn
= be32_to_cpu(hdr
->datasn
);
1255 hdr
->offset
= be32_to_cpu(hdr
->offset
);
1257 if (!payload_length
) {
1258 pr_err("DataOUT payload is ZERO, protocol error.\n");
1259 return iscsit_add_reject(ISCSI_REASON_PROTOCOL_ERROR
, 1,
1264 spin_lock_bh(&conn
->sess
->session_stats_lock
);
1265 conn
->sess
->rx_data_octets
+= payload_length
;
1266 if (conn
->sess
->se_sess
->se_node_acl
) {
1267 spin_lock(&conn
->sess
->se_sess
->se_node_acl
->stats_lock
);
1268 conn
->sess
->se_sess
->se_node_acl
->write_bytes
+= payload_length
;
1269 spin_unlock(&conn
->sess
->se_sess
->se_node_acl
->stats_lock
);
1271 spin_unlock_bh(&conn
->sess
->session_stats_lock
);
1273 if (payload_length
> conn
->conn_ops
->MaxRecvDataSegmentLength
) {
1274 pr_err("DataSegmentLength: %u is greater than"
1275 " MaxRecvDataSegmentLength: %u\n", payload_length
,
1276 conn
->conn_ops
->MaxRecvDataSegmentLength
);
1277 return iscsit_add_reject(ISCSI_REASON_PROTOCOL_ERROR
, 1,
1281 cmd
= iscsit_find_cmd_from_itt_or_dump(conn
, hdr
->itt
,
1286 pr_debug("Got DataOut ITT: 0x%08x, TTT: 0x%08x,"
1287 " DataSN: 0x%08x, Offset: %u, Length: %u, CID: %hu\n",
1288 hdr
->itt
, hdr
->ttt
, hdr
->datasn
, hdr
->offset
,
1289 payload_length
, conn
->cid
);
1291 if (cmd
->cmd_flags
& ICF_GOT_LAST_DATAOUT
) {
1292 pr_err("Command ITT: 0x%08x received DataOUT after"
1293 " last DataOUT received, dumping payload\n",
1294 cmd
->init_task_tag
);
1295 return iscsit_dump_data_payload(conn
, payload_length
, 1);
1298 if (cmd
->data_direction
!= DMA_TO_DEVICE
) {
1299 pr_err("Command ITT: 0x%08x received DataOUT for a"
1300 " NON-WRITE command.\n", cmd
->init_task_tag
);
1301 return iscsit_add_reject_from_cmd(ISCSI_REASON_PROTOCOL_ERROR
,
1304 se_cmd
= &cmd
->se_cmd
;
1305 iscsit_mod_dataout_timer(cmd
);
1307 if ((hdr
->offset
+ payload_length
) > cmd
->data_length
) {
1308 pr_err("DataOut Offset: %u, Length %u greater than"
1309 " iSCSI Command EDTL %u, protocol error.\n",
1310 hdr
->offset
, payload_length
, cmd
->data_length
);
1311 return iscsit_add_reject_from_cmd(ISCSI_REASON_BOOKMARK_INVALID
,
1315 if (cmd
->unsolicited_data
) {
1316 int dump_unsolicited_data
= 0;
1318 if (conn
->sess
->sess_ops
->InitialR2T
) {
1319 pr_err("Received unexpected unsolicited data"
1320 " while InitialR2T=Yes, protocol error.\n");
1321 transport_send_check_condition_and_sense(&cmd
->se_cmd
,
1322 TCM_UNEXPECTED_UNSOLICITED_DATA
, 0);
1326 * Special case for dealing with Unsolicited DataOUT
1327 * and Unsupported SAM WRITE Opcodes and SE resource allocation
1331 /* Something's amiss if we're not in WRITE_PENDING state... */
1332 spin_lock_irqsave(&se_cmd
->t_state_lock
, flags
);
1333 WARN_ON(se_cmd
->t_state
!= TRANSPORT_WRITE_PENDING
);
1334 spin_unlock_irqrestore(&se_cmd
->t_state_lock
, flags
);
1336 spin_lock_irqsave(&se_cmd
->t_state_lock
, flags
);
1337 if (!(se_cmd
->se_cmd_flags
& SCF_SUPPORTED_SAM_OPCODE
) ||
1338 (se_cmd
->se_cmd_flags
& SCF_SCSI_CDB_EXCEPTION
))
1339 dump_unsolicited_data
= 1;
1340 spin_unlock_irqrestore(&se_cmd
->t_state_lock
, flags
);
1342 if (dump_unsolicited_data
) {
1344 * Check if a delayed TASK_ABORTED status needs to
1345 * be sent now if the ISCSI_FLAG_CMD_FINAL has been
1346 * received with the unsolicitied data out.
1348 if (hdr
->flags
& ISCSI_FLAG_CMD_FINAL
)
1349 iscsit_stop_dataout_timer(cmd
);
1351 transport_check_aborted_status(se_cmd
,
1352 (hdr
->flags
& ISCSI_FLAG_CMD_FINAL
));
1353 return iscsit_dump_data_payload(conn
, payload_length
, 1);
1357 * For the normal solicited data path:
1359 * Check for a delayed TASK_ABORTED status and dump any
1360 * incoming data out payload if one exists. Also, when the
1361 * ISCSI_FLAG_CMD_FINAL is set to denote the end of the current
1362 * data out sequence, we decrement outstanding_r2ts. Once
1363 * outstanding_r2ts reaches zero, go ahead and send the delayed
1364 * TASK_ABORTED status.
1366 if (atomic_read(&se_cmd
->t_transport_aborted
) != 0) {
1367 if (hdr
->flags
& ISCSI_FLAG_CMD_FINAL
)
1368 if (--cmd
->outstanding_r2ts
< 1) {
1369 iscsit_stop_dataout_timer(cmd
);
1370 transport_check_aborted_status(
1374 return iscsit_dump_data_payload(conn
, payload_length
, 1);
1378 * Preform DataSN, DataSequenceInOrder, DataPDUInOrder, and
1379 * within-command recovery checks before receiving the payload.
1381 ret
= iscsit_check_pre_dataout(cmd
, buf
);
1382 if (ret
== DATAOUT_WITHIN_COMMAND_RECOVERY
)
1384 else if (ret
== DATAOUT_CANNOT_RECOVER
)
1387 rx_size
+= payload_length
;
1388 iov
= &cmd
->iov_data
[0];
1390 iov_ret
= iscsit_map_iovec(cmd
, iov
, hdr
->offset
, payload_length
);
1394 iov_count
+= iov_ret
;
1396 padding
= ((-payload_length
) & 3);
1398 iov
[iov_count
].iov_base
= cmd
->pad_bytes
;
1399 iov
[iov_count
++].iov_len
= padding
;
1401 pr_debug("Receiving %u padding bytes.\n", padding
);
1404 if (conn
->conn_ops
->DataDigest
) {
1405 iov
[iov_count
].iov_base
= &checksum
;
1406 iov
[iov_count
++].iov_len
= ISCSI_CRC_LEN
;
1407 rx_size
+= ISCSI_CRC_LEN
;
1410 rx_got
= rx_data(conn
, &cmd
->iov_data
[0], iov_count
, rx_size
);
1412 iscsit_unmap_iovec(cmd
);
1414 if (rx_got
!= rx_size
)
1417 if (conn
->conn_ops
->DataDigest
) {
1420 data_crc
= iscsit_do_crypto_hash_sg(&conn
->conn_rx_hash
, cmd
,
1421 hdr
->offset
, payload_length
, padding
,
1424 if (checksum
!= data_crc
) {
1425 pr_err("ITT: 0x%08x, Offset: %u, Length: %u,"
1426 " DataSN: 0x%08x, CRC32C DataDigest 0x%08x"
1427 " does not match computed 0x%08x\n",
1428 hdr
->itt
, hdr
->offset
, payload_length
,
1429 hdr
->datasn
, checksum
, data_crc
);
1430 data_crc_failed
= 1;
1432 pr_debug("Got CRC32C DataDigest 0x%08x for"
1433 " %u bytes of Data Out\n", checksum
,
1438 * Increment post receive data and CRC values or perform
1439 * within-command recovery.
1441 ret
= iscsit_check_post_dataout(cmd
, buf
, data_crc_failed
);
1442 if ((ret
== DATAOUT_NORMAL
) || (ret
== DATAOUT_WITHIN_COMMAND_RECOVERY
))
1444 else if (ret
== DATAOUT_SEND_R2T
) {
1445 iscsit_set_dataout_sequence_values(cmd
);
1446 iscsit_build_r2ts_for_cmd(cmd
, conn
, 0);
1447 } else if (ret
== DATAOUT_SEND_TO_TRANSPORT
) {
1449 * Handle extra special case for out of order
1450 * Unsolicited Data Out.
1452 spin_lock_bh(&cmd
->istate_lock
);
1453 ooo_cmdsn
= (cmd
->cmd_flags
& ICF_OOO_CMDSN
);
1454 cmd
->cmd_flags
|= ICF_GOT_LAST_DATAOUT
;
1455 cmd
->i_state
= ISTATE_RECEIVED_LAST_DATAOUT
;
1456 spin_unlock_bh(&cmd
->istate_lock
);
1458 iscsit_stop_dataout_timer(cmd
);
1459 return (!ooo_cmdsn
) ? transport_generic_handle_data(
1461 } else /* DATAOUT_CANNOT_RECOVER */
1467 static int iscsit_handle_nop_out(
1468 struct iscsi_conn
*conn
,
1471 unsigned char *ping_data
= NULL
;
1472 int cmdsn_ret
, niov
= 0, ret
= 0, rx_got
, rx_size
;
1473 u32 checksum
, data_crc
, padding
= 0, payload_length
;
1475 struct iscsi_cmd
*cmd
= NULL
;
1476 struct kvec
*iov
= NULL
;
1477 struct iscsi_nopout
*hdr
;
1479 hdr
= (struct iscsi_nopout
*) buf
;
1480 payload_length
= ntoh24(hdr
->dlength
);
1481 lun
= get_unaligned_le64(&hdr
->lun
);
1482 hdr
->itt
= be32_to_cpu(hdr
->itt
);
1483 hdr
->ttt
= be32_to_cpu(hdr
->ttt
);
1484 hdr
->cmdsn
= be32_to_cpu(hdr
->cmdsn
);
1485 hdr
->exp_statsn
= be32_to_cpu(hdr
->exp_statsn
);
1487 if ((hdr
->itt
== 0xFFFFFFFF) && !(hdr
->opcode
& ISCSI_OP_IMMEDIATE
)) {
1488 pr_err("NOPOUT ITT is reserved, but Immediate Bit is"
1489 " not set, protocol error.\n");
1490 return iscsit_add_reject(ISCSI_REASON_PROTOCOL_ERROR
, 1,
1494 if (payload_length
> conn
->conn_ops
->MaxRecvDataSegmentLength
) {
1495 pr_err("NOPOUT Ping Data DataSegmentLength: %u is"
1496 " greater than MaxRecvDataSegmentLength: %u, protocol"
1497 " error.\n", payload_length
,
1498 conn
->conn_ops
->MaxRecvDataSegmentLength
);
1499 return iscsit_add_reject(ISCSI_REASON_PROTOCOL_ERROR
, 1,
1503 pr_debug("Got NOPOUT Ping %s ITT: 0x%08x, TTT: 0x%09x,"
1504 " CmdSN: 0x%08x, ExpStatSN: 0x%08x, Length: %u\n",
1505 (hdr
->itt
== 0xFFFFFFFF) ? "Response" : "Request",
1506 hdr
->itt
, hdr
->ttt
, hdr
->cmdsn
, hdr
->exp_statsn
,
1509 * This is not a response to a Unsolicited NopIN, which means
1510 * it can either be a NOPOUT ping request (with a valid ITT),
1511 * or a NOPOUT not requesting a NOPIN (with a reserved ITT).
1512 * Either way, make sure we allocate an struct iscsi_cmd, as both
1513 * can contain ping data.
1515 if (hdr
->ttt
== 0xFFFFFFFF) {
1516 cmd
= iscsit_allocate_cmd(conn
, GFP_KERNEL
);
1518 return iscsit_add_reject(
1519 ISCSI_REASON_BOOKMARK_NO_RESOURCES
,
1522 cmd
->iscsi_opcode
= ISCSI_OP_NOOP_OUT
;
1523 cmd
->i_state
= ISTATE_SEND_NOPIN
;
1524 cmd
->immediate_cmd
= ((hdr
->opcode
& ISCSI_OP_IMMEDIATE
) ?
1526 conn
->sess
->init_task_tag
= cmd
->init_task_tag
= hdr
->itt
;
1527 cmd
->targ_xfer_tag
= 0xFFFFFFFF;
1528 cmd
->cmd_sn
= hdr
->cmdsn
;
1529 cmd
->exp_stat_sn
= hdr
->exp_statsn
;
1530 cmd
->data_direction
= DMA_NONE
;
1533 if (payload_length
&& (hdr
->ttt
== 0xFFFFFFFF)) {
1534 rx_size
= payload_length
;
1535 ping_data
= kzalloc(payload_length
+ 1, GFP_KERNEL
);
1537 pr_err("Unable to allocate memory for"
1538 " NOPOUT ping data.\n");
1543 iov
= &cmd
->iov_misc
[0];
1544 iov
[niov
].iov_base
= ping_data
;
1545 iov
[niov
++].iov_len
= payload_length
;
1547 padding
= ((-payload_length
) & 3);
1549 pr_debug("Receiving %u additional bytes"
1550 " for padding.\n", padding
);
1551 iov
[niov
].iov_base
= &cmd
->pad_bytes
;
1552 iov
[niov
++].iov_len
= padding
;
1555 if (conn
->conn_ops
->DataDigest
) {
1556 iov
[niov
].iov_base
= &checksum
;
1557 iov
[niov
++].iov_len
= ISCSI_CRC_LEN
;
1558 rx_size
+= ISCSI_CRC_LEN
;
1561 rx_got
= rx_data(conn
, &cmd
->iov_misc
[0], niov
, rx_size
);
1562 if (rx_got
!= rx_size
) {
1567 if (conn
->conn_ops
->DataDigest
) {
1568 iscsit_do_crypto_hash_buf(&conn
->conn_rx_hash
,
1569 ping_data
, payload_length
,
1570 padding
, cmd
->pad_bytes
,
1573 if (checksum
!= data_crc
) {
1574 pr_err("Ping data CRC32C DataDigest"
1575 " 0x%08x does not match computed 0x%08x\n",
1576 checksum
, data_crc
);
1577 if (!conn
->sess
->sess_ops
->ErrorRecoveryLevel
) {
1578 pr_err("Unable to recover from"
1579 " NOPOUT Ping DataCRC failure while in"
1585 * Silently drop this PDU and let the
1586 * initiator plug the CmdSN gap.
1588 pr_debug("Dropping NOPOUT"
1589 " Command CmdSN: 0x%08x due to"
1590 " DataCRC error.\n", hdr
->cmdsn
);
1595 pr_debug("Got CRC32C DataDigest"
1596 " 0x%08x for %u bytes of ping data.\n",
1597 checksum
, payload_length
);
1601 ping_data
[payload_length
] = '\0';
1603 * Attach ping data to struct iscsi_cmd->buf_ptr.
1605 cmd
->buf_ptr
= (void *)ping_data
;
1606 cmd
->buf_ptr_size
= payload_length
;
1608 pr_debug("Got %u bytes of NOPOUT ping"
1609 " data.\n", payload_length
);
1610 pr_debug("Ping Data: \"%s\"\n", ping_data
);
1613 if (hdr
->itt
!= 0xFFFFFFFF) {
1615 pr_err("Checking CmdSN for NOPOUT,"
1616 " but cmd is NULL!\n");
1620 * Initiator is expecting a NopIN ping reply,
1622 spin_lock_bh(&conn
->cmd_lock
);
1623 list_add_tail(&cmd
->i_list
, &conn
->conn_cmd_list
);
1624 spin_unlock_bh(&conn
->cmd_lock
);
1626 iscsit_ack_from_expstatsn(conn
, hdr
->exp_statsn
);
1628 if (hdr
->opcode
& ISCSI_OP_IMMEDIATE
) {
1629 iscsit_add_cmd_to_response_queue(cmd
, conn
,
1634 cmdsn_ret
= iscsit_sequence_cmd(conn
, cmd
, hdr
->cmdsn
);
1635 if (cmdsn_ret
== CMDSN_LOWER_THAN_EXP
) {
1639 if (cmdsn_ret
== CMDSN_ERROR_CANNOT_RECOVER
)
1640 return iscsit_add_reject_from_cmd(
1641 ISCSI_REASON_PROTOCOL_ERROR
,
1647 if (hdr
->ttt
!= 0xFFFFFFFF) {
1649 * This was a response to a unsolicited NOPIN ping.
1651 cmd
= iscsit_find_cmd_from_ttt(conn
, hdr
->ttt
);
1655 iscsit_stop_nopin_response_timer(conn
);
1657 cmd
->i_state
= ISTATE_REMOVE
;
1658 iscsit_add_cmd_to_immediate_queue(cmd
, conn
, cmd
->i_state
);
1659 iscsit_start_nopin_timer(conn
);
1662 * Initiator is not expecting a NOPIN is response.
1663 * Just ignore for now.
1665 * iSCSI v19-91 10.18
1666 * "A NOP-OUT may also be used to confirm a changed
1667 * ExpStatSN if another PDU will not be available
1677 iscsit_release_cmd(cmd
);
1683 static int iscsit_handle_task_mgt_cmd(
1684 struct iscsi_conn
*conn
,
1687 struct iscsi_cmd
*cmd
;
1688 struct se_tmr_req
*se_tmr
;
1689 struct iscsi_tmr_req
*tmr_req
;
1690 struct iscsi_tm
*hdr
;
1692 int out_of_order_cmdsn
= 0;
1696 hdr
= (struct iscsi_tm
*) buf
;
1697 payload_length
= ntoh24(hdr
->dlength
);
1698 hdr
->itt
= be32_to_cpu(hdr
->itt
);
1699 hdr
->rtt
= be32_to_cpu(hdr
->rtt
);
1700 hdr
->cmdsn
= be32_to_cpu(hdr
->cmdsn
);
1701 hdr
->exp_statsn
= be32_to_cpu(hdr
->exp_statsn
);
1702 hdr
->refcmdsn
= be32_to_cpu(hdr
->refcmdsn
);
1703 hdr
->exp_datasn
= be32_to_cpu(hdr
->exp_datasn
);
1704 hdr
->flags
&= ~ISCSI_FLAG_CMD_FINAL
;
1705 function
= hdr
->flags
;
1707 pr_debug("Got Task Management Request ITT: 0x%08x, CmdSN:"
1708 " 0x%08x, Function: 0x%02x, RefTaskTag: 0x%08x, RefCmdSN:"
1709 " 0x%08x, CID: %hu\n", hdr
->itt
, hdr
->cmdsn
, function
,
1710 hdr
->rtt
, hdr
->refcmdsn
, conn
->cid
);
1712 if ((function
!= ISCSI_TM_FUNC_ABORT_TASK
) &&
1713 ((function
!= ISCSI_TM_FUNC_TASK_REASSIGN
) &&
1714 (hdr
->rtt
!= ISCSI_RESERVED_TAG
))) {
1715 pr_err("RefTaskTag should be set to 0xFFFFFFFF.\n");
1716 hdr
->rtt
= ISCSI_RESERVED_TAG
;
1719 if ((function
== ISCSI_TM_FUNC_TASK_REASSIGN
) &&
1720 !(hdr
->opcode
& ISCSI_OP_IMMEDIATE
)) {
1721 pr_err("Task Management Request TASK_REASSIGN not"
1722 " issued as immediate command, bad iSCSI Initiator"
1723 "implementation\n");
1724 return iscsit_add_reject(ISCSI_REASON_PROTOCOL_ERROR
, 1,
1727 if ((function
!= ISCSI_TM_FUNC_ABORT_TASK
) &&
1728 (hdr
->refcmdsn
!= ISCSI_RESERVED_TAG
))
1729 hdr
->refcmdsn
= ISCSI_RESERVED_TAG
;
1731 cmd
= iscsit_allocate_se_cmd_for_tmr(conn
, function
);
1733 return iscsit_add_reject(ISCSI_REASON_BOOKMARK_NO_RESOURCES
,
1736 cmd
->iscsi_opcode
= ISCSI_OP_SCSI_TMFUNC
;
1737 cmd
->i_state
= ISTATE_SEND_TASKMGTRSP
;
1738 cmd
->immediate_cmd
= ((hdr
->opcode
& ISCSI_OP_IMMEDIATE
) ? 1 : 0);
1739 cmd
->init_task_tag
= hdr
->itt
;
1740 cmd
->targ_xfer_tag
= 0xFFFFFFFF;
1741 cmd
->cmd_sn
= hdr
->cmdsn
;
1742 cmd
->exp_stat_sn
= hdr
->exp_statsn
;
1743 se_tmr
= cmd
->se_cmd
.se_tmr_req
;
1744 tmr_req
= cmd
->tmr_req
;
1746 * Locate the struct se_lun for all TMRs not related to ERL=2 TASK_REASSIGN
1748 if (function
!= ISCSI_TM_FUNC_TASK_REASSIGN
) {
1749 ret
= iscsit_get_lun_for_tmr(cmd
,
1750 get_unaligned_le64(&hdr
->lun
));
1752 cmd
->se_cmd
.se_cmd_flags
|= SCF_SCSI_CDB_EXCEPTION
;
1753 se_tmr
->response
= ISCSI_TMF_RSP_NO_LUN
;
1759 case ISCSI_TM_FUNC_ABORT_TASK
:
1760 se_tmr
->response
= iscsit_tmr_abort_task(cmd
, buf
);
1761 if (se_tmr
->response
!= ISCSI_TMF_RSP_COMPLETE
) {
1762 cmd
->se_cmd
.se_cmd_flags
|= SCF_SCSI_CDB_EXCEPTION
;
1766 case ISCSI_TM_FUNC_ABORT_TASK_SET
:
1767 case ISCSI_TM_FUNC_CLEAR_ACA
:
1768 case ISCSI_TM_FUNC_CLEAR_TASK_SET
:
1769 case ISCSI_TM_FUNC_LOGICAL_UNIT_RESET
:
1771 case ISCSI_TM_FUNC_TARGET_WARM_RESET
:
1772 if (iscsit_tmr_task_warm_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_TARGET_COLD_RESET
:
1779 if (iscsit_tmr_task_cold_reset(conn
, tmr_req
, buf
) < 0) {
1780 cmd
->se_cmd
.se_cmd_flags
|= SCF_SCSI_CDB_EXCEPTION
;
1781 se_tmr
->response
= ISCSI_TMF_RSP_AUTH_FAILED
;
1785 case ISCSI_TM_FUNC_TASK_REASSIGN
:
1786 se_tmr
->response
= iscsit_tmr_task_reassign(cmd
, buf
);
1788 * Perform sanity checks on the ExpDataSN only if the
1789 * TASK_REASSIGN was successful.
1791 if (se_tmr
->response
!= ISCSI_TMF_RSP_COMPLETE
)
1794 if (iscsit_check_task_reassign_expdatasn(tmr_req
, conn
) < 0)
1795 return iscsit_add_reject_from_cmd(
1796 ISCSI_REASON_BOOKMARK_INVALID
, 1, 1,
1800 pr_err("Unknown TMR function: 0x%02x, protocol"
1801 " error.\n", function
);
1802 cmd
->se_cmd
.se_cmd_flags
|= SCF_SCSI_CDB_EXCEPTION
;
1803 se_tmr
->response
= ISCSI_TMF_RSP_NOT_SUPPORTED
;
1807 if ((function
!= ISCSI_TM_FUNC_TASK_REASSIGN
) &&
1808 (se_tmr
->response
== ISCSI_TMF_RSP_COMPLETE
))
1809 se_tmr
->call_transport
= 1;
1811 spin_lock_bh(&conn
->cmd_lock
);
1812 list_add_tail(&cmd
->i_list
, &conn
->conn_cmd_list
);
1813 spin_unlock_bh(&conn
->cmd_lock
);
1815 if (!(hdr
->opcode
& ISCSI_OP_IMMEDIATE
)) {
1816 int cmdsn_ret
= iscsit_sequence_cmd(conn
, cmd
, hdr
->cmdsn
);
1817 if (cmdsn_ret
== CMDSN_HIGHER_THAN_EXP
)
1818 out_of_order_cmdsn
= 1;
1819 else if (cmdsn_ret
== CMDSN_LOWER_THAN_EXP
)
1821 else if (cmdsn_ret
== CMDSN_ERROR_CANNOT_RECOVER
)
1822 return iscsit_add_reject_from_cmd(
1823 ISCSI_REASON_PROTOCOL_ERROR
,
1826 iscsit_ack_from_expstatsn(conn
, hdr
->exp_statsn
);
1828 if (out_of_order_cmdsn
|| !(hdr
->opcode
& ISCSI_OP_IMMEDIATE
))
1831 * Found the referenced task, send to transport for processing.
1833 if (se_tmr
->call_transport
)
1834 return transport_generic_handle_tmr(&cmd
->se_cmd
);
1837 * Could not find the referenced LUN, task, or Task Management
1838 * command not authorized or supported. Change state and
1839 * let the tx_thread send the response.
1841 * For connection recovery, this is also the default action for
1842 * TMR TASK_REASSIGN.
1844 iscsit_add_cmd_to_response_queue(cmd
, conn
, cmd
->i_state
);
1848 /* #warning FIXME: Support Text Command parameters besides SendTargets */
1849 static int iscsit_handle_text_cmd(
1850 struct iscsi_conn
*conn
,
1853 char *text_ptr
, *text_in
;
1854 int cmdsn_ret
, niov
= 0, rx_got
, rx_size
;
1855 u32 checksum
= 0, data_crc
= 0, payload_length
;
1856 u32 padding
= 0, pad_bytes
= 0, text_length
= 0;
1857 struct iscsi_cmd
*cmd
;
1859 struct iscsi_text
*hdr
;
1861 hdr
= (struct iscsi_text
*) buf
;
1862 payload_length
= ntoh24(hdr
->dlength
);
1863 hdr
->itt
= be32_to_cpu(hdr
->itt
);
1864 hdr
->ttt
= be32_to_cpu(hdr
->ttt
);
1865 hdr
->cmdsn
= be32_to_cpu(hdr
->cmdsn
);
1866 hdr
->exp_statsn
= be32_to_cpu(hdr
->exp_statsn
);
1868 if (payload_length
> conn
->conn_ops
->MaxRecvDataSegmentLength
) {
1869 pr_err("Unable to accept text parameter length: %u"
1870 "greater than MaxRecvDataSegmentLength %u.\n",
1871 payload_length
, conn
->conn_ops
->MaxRecvDataSegmentLength
);
1872 return iscsit_add_reject(ISCSI_REASON_PROTOCOL_ERROR
, 1,
1876 pr_debug("Got Text Request: ITT: 0x%08x, CmdSN: 0x%08x,"
1877 " ExpStatSN: 0x%08x, Length: %u\n", hdr
->itt
, hdr
->cmdsn
,
1878 hdr
->exp_statsn
, payload_length
);
1880 rx_size
= text_length
= payload_length
;
1882 text_in
= kzalloc(text_length
, GFP_KERNEL
);
1884 pr_err("Unable to allocate memory for"
1885 " incoming text parameters\n");
1889 memset(iov
, 0, 3 * sizeof(struct kvec
));
1890 iov
[niov
].iov_base
= text_in
;
1891 iov
[niov
++].iov_len
= text_length
;
1893 padding
= ((-payload_length
) & 3);
1895 iov
[niov
].iov_base
= &pad_bytes
;
1896 iov
[niov
++].iov_len
= padding
;
1898 pr_debug("Receiving %u additional bytes"
1899 " for padding.\n", padding
);
1901 if (conn
->conn_ops
->DataDigest
) {
1902 iov
[niov
].iov_base
= &checksum
;
1903 iov
[niov
++].iov_len
= ISCSI_CRC_LEN
;
1904 rx_size
+= ISCSI_CRC_LEN
;
1907 rx_got
= rx_data(conn
, &iov
[0], niov
, rx_size
);
1908 if (rx_got
!= rx_size
) {
1913 if (conn
->conn_ops
->DataDigest
) {
1914 iscsit_do_crypto_hash_buf(&conn
->conn_rx_hash
,
1915 text_in
, text_length
,
1916 padding
, (u8
*)&pad_bytes
,
1919 if (checksum
!= data_crc
) {
1920 pr_err("Text data CRC32C DataDigest"
1921 " 0x%08x does not match computed"
1922 " 0x%08x\n", checksum
, data_crc
);
1923 if (!conn
->sess
->sess_ops
->ErrorRecoveryLevel
) {
1924 pr_err("Unable to recover from"
1925 " Text Data digest failure while in"
1931 * Silently drop this PDU and let the
1932 * initiator plug the CmdSN gap.
1934 pr_debug("Dropping Text"
1935 " Command CmdSN: 0x%08x due to"
1936 " DataCRC error.\n", hdr
->cmdsn
);
1941 pr_debug("Got CRC32C DataDigest"
1942 " 0x%08x for %u bytes of text data.\n",
1943 checksum
, text_length
);
1946 text_in
[text_length
- 1] = '\0';
1947 pr_debug("Successfully read %d bytes of text"
1948 " data.\n", text_length
);
1950 if (strncmp("SendTargets", text_in
, 11) != 0) {
1951 pr_err("Received Text Data that is not"
1952 " SendTargets, cannot continue.\n");
1956 text_ptr
= strchr(text_in
, '=');
1958 pr_err("No \"=\" separator found in Text Data,"
1959 " cannot continue.\n");
1963 if (strncmp("=All", text_ptr
, 4) != 0) {
1964 pr_err("Unable to locate All value for"
1965 " SendTargets key, cannot continue.\n");
1969 /*#warning Support SendTargets=(iSCSI Target Name/Nothing) values. */
1973 cmd
= iscsit_allocate_cmd(conn
, GFP_KERNEL
);
1975 return iscsit_add_reject(ISCSI_REASON_BOOKMARK_NO_RESOURCES
,
1978 cmd
->iscsi_opcode
= ISCSI_OP_TEXT
;
1979 cmd
->i_state
= ISTATE_SEND_TEXTRSP
;
1980 cmd
->immediate_cmd
= ((hdr
->opcode
& ISCSI_OP_IMMEDIATE
) ? 1 : 0);
1981 conn
->sess
->init_task_tag
= cmd
->init_task_tag
= hdr
->itt
;
1982 cmd
->targ_xfer_tag
= 0xFFFFFFFF;
1983 cmd
->cmd_sn
= hdr
->cmdsn
;
1984 cmd
->exp_stat_sn
= hdr
->exp_statsn
;
1985 cmd
->data_direction
= DMA_NONE
;
1987 spin_lock_bh(&conn
->cmd_lock
);
1988 list_add_tail(&cmd
->i_list
, &conn
->conn_cmd_list
);
1989 spin_unlock_bh(&conn
->cmd_lock
);
1991 iscsit_ack_from_expstatsn(conn
, hdr
->exp_statsn
);
1993 if (!(hdr
->opcode
& ISCSI_OP_IMMEDIATE
)) {
1994 cmdsn_ret
= iscsit_sequence_cmd(conn
, cmd
, hdr
->cmdsn
);
1995 if (cmdsn_ret
== CMDSN_ERROR_CANNOT_RECOVER
)
1996 return iscsit_add_reject_from_cmd(
1997 ISCSI_REASON_PROTOCOL_ERROR
,
2003 return iscsit_execute_cmd(cmd
, 0);
2006 int iscsit_logout_closesession(struct iscsi_cmd
*cmd
, struct iscsi_conn
*conn
)
2008 struct iscsi_conn
*conn_p
;
2009 struct iscsi_session
*sess
= conn
->sess
;
2011 pr_debug("Received logout request CLOSESESSION on CID: %hu"
2012 " for SID: %u.\n", conn
->cid
, conn
->sess
->sid
);
2014 atomic_set(&sess
->session_logout
, 1);
2015 atomic_set(&conn
->conn_logout_remove
, 1);
2016 conn
->conn_logout_reason
= ISCSI_LOGOUT_REASON_CLOSE_SESSION
;
2018 iscsit_inc_conn_usage_count(conn
);
2019 iscsit_inc_session_usage_count(sess
);
2021 spin_lock_bh(&sess
->conn_lock
);
2022 list_for_each_entry(conn_p
, &sess
->sess_conn_list
, conn_list
) {
2023 if (conn_p
->conn_state
!= TARG_CONN_STATE_LOGGED_IN
)
2026 pr_debug("Moving to TARG_CONN_STATE_IN_LOGOUT.\n");
2027 conn_p
->conn_state
= TARG_CONN_STATE_IN_LOGOUT
;
2029 spin_unlock_bh(&sess
->conn_lock
);
2031 iscsit_add_cmd_to_response_queue(cmd
, conn
, cmd
->i_state
);
2036 int iscsit_logout_closeconnection(struct iscsi_cmd
*cmd
, struct iscsi_conn
*conn
)
2038 struct iscsi_conn
*l_conn
;
2039 struct iscsi_session
*sess
= conn
->sess
;
2041 pr_debug("Received logout request CLOSECONNECTION for CID:"
2042 " %hu on CID: %hu.\n", cmd
->logout_cid
, conn
->cid
);
2045 * A Logout Request with a CLOSECONNECTION reason code for a CID
2046 * can arrive on a connection with a differing CID.
2048 if (conn
->cid
== cmd
->logout_cid
) {
2049 spin_lock_bh(&conn
->state_lock
);
2050 pr_debug("Moving to TARG_CONN_STATE_IN_LOGOUT.\n");
2051 conn
->conn_state
= TARG_CONN_STATE_IN_LOGOUT
;
2053 atomic_set(&conn
->conn_logout_remove
, 1);
2054 conn
->conn_logout_reason
= ISCSI_LOGOUT_REASON_CLOSE_CONNECTION
;
2055 iscsit_inc_conn_usage_count(conn
);
2057 spin_unlock_bh(&conn
->state_lock
);
2060 * Handle all different cid CLOSECONNECTION requests in
2061 * iscsit_logout_post_handler_diffcid() as to give enough
2062 * time for any non immediate command's CmdSN to be
2063 * acknowledged on the connection in question.
2065 * Here we simply make sure the CID is still around.
2067 l_conn
= iscsit_get_conn_from_cid(sess
,
2070 cmd
->logout_response
= ISCSI_LOGOUT_CID_NOT_FOUND
;
2071 iscsit_add_cmd_to_response_queue(cmd
, conn
,
2076 iscsit_dec_conn_usage_count(l_conn
);
2079 iscsit_add_cmd_to_response_queue(cmd
, conn
, cmd
->i_state
);
2084 int iscsit_logout_removeconnforrecovery(struct iscsi_cmd
*cmd
, struct iscsi_conn
*conn
)
2086 struct iscsi_session
*sess
= conn
->sess
;
2088 pr_debug("Received explicit REMOVECONNFORRECOVERY logout for"
2089 " CID: %hu on CID: %hu.\n", cmd
->logout_cid
, conn
->cid
);
2091 if (sess
->sess_ops
->ErrorRecoveryLevel
!= 2) {
2092 pr_err("Received Logout Request REMOVECONNFORRECOVERY"
2093 " while ERL!=2.\n");
2094 cmd
->logout_response
= ISCSI_LOGOUT_RECOVERY_UNSUPPORTED
;
2095 iscsit_add_cmd_to_response_queue(cmd
, conn
, cmd
->i_state
);
2099 if (conn
->cid
== cmd
->logout_cid
) {
2100 pr_err("Received Logout Request REMOVECONNFORRECOVERY"
2101 " with CID: %hu on CID: %hu, implementation error.\n",
2102 cmd
->logout_cid
, conn
->cid
);
2103 cmd
->logout_response
= ISCSI_LOGOUT_CLEANUP_FAILED
;
2104 iscsit_add_cmd_to_response_queue(cmd
, conn
, cmd
->i_state
);
2108 iscsit_add_cmd_to_response_queue(cmd
, conn
, cmd
->i_state
);
2113 static int iscsit_handle_logout_cmd(
2114 struct iscsi_conn
*conn
,
2117 int cmdsn_ret
, logout_remove
= 0;
2119 struct iscsi_cmd
*cmd
;
2120 struct iscsi_logout
*hdr
;
2121 struct iscsi_tiqn
*tiqn
= iscsit_snmp_get_tiqn(conn
);
2123 hdr
= (struct iscsi_logout
*) buf
;
2124 reason_code
= (hdr
->flags
& 0x7f);
2125 hdr
->itt
= be32_to_cpu(hdr
->itt
);
2126 hdr
->cid
= be16_to_cpu(hdr
->cid
);
2127 hdr
->cmdsn
= be32_to_cpu(hdr
->cmdsn
);
2128 hdr
->exp_statsn
= be32_to_cpu(hdr
->exp_statsn
);
2131 spin_lock(&tiqn
->logout_stats
.lock
);
2132 if (reason_code
== ISCSI_LOGOUT_REASON_CLOSE_SESSION
)
2133 tiqn
->logout_stats
.normal_logouts
++;
2135 tiqn
->logout_stats
.abnormal_logouts
++;
2136 spin_unlock(&tiqn
->logout_stats
.lock
);
2139 pr_debug("Got Logout Request ITT: 0x%08x CmdSN: 0x%08x"
2140 " ExpStatSN: 0x%08x Reason: 0x%02x CID: %hu on CID: %hu\n",
2141 hdr
->itt
, hdr
->cmdsn
, hdr
->exp_statsn
, reason_code
,
2142 hdr
->cid
, conn
->cid
);
2144 if (conn
->conn_state
!= TARG_CONN_STATE_LOGGED_IN
) {
2145 pr_err("Received logout request on connection that"
2146 " is not in logged in state, ignoring request.\n");
2150 cmd
= iscsit_allocate_cmd(conn
, GFP_KERNEL
);
2152 return iscsit_add_reject(ISCSI_REASON_BOOKMARK_NO_RESOURCES
, 1,
2155 cmd
->iscsi_opcode
= ISCSI_OP_LOGOUT
;
2156 cmd
->i_state
= ISTATE_SEND_LOGOUTRSP
;
2157 cmd
->immediate_cmd
= ((hdr
->opcode
& ISCSI_OP_IMMEDIATE
) ? 1 : 0);
2158 conn
->sess
->init_task_tag
= cmd
->init_task_tag
= hdr
->itt
;
2159 cmd
->targ_xfer_tag
= 0xFFFFFFFF;
2160 cmd
->cmd_sn
= hdr
->cmdsn
;
2161 cmd
->exp_stat_sn
= hdr
->exp_statsn
;
2162 cmd
->logout_cid
= hdr
->cid
;
2163 cmd
->logout_reason
= reason_code
;
2164 cmd
->data_direction
= DMA_NONE
;
2167 * We need to sleep in these cases (by returning 1) until the Logout
2168 * Response gets sent in the tx thread.
2170 if ((reason_code
== ISCSI_LOGOUT_REASON_CLOSE_SESSION
) ||
2171 ((reason_code
== ISCSI_LOGOUT_REASON_CLOSE_CONNECTION
) &&
2172 (hdr
->cid
== conn
->cid
)))
2175 spin_lock_bh(&conn
->cmd_lock
);
2176 list_add_tail(&cmd
->i_list
, &conn
->conn_cmd_list
);
2177 spin_unlock_bh(&conn
->cmd_lock
);
2179 if (reason_code
!= ISCSI_LOGOUT_REASON_RECOVERY
)
2180 iscsit_ack_from_expstatsn(conn
, hdr
->exp_statsn
);
2183 * Immediate commands are executed, well, immediately.
2184 * Non-Immediate Logout Commands are executed in CmdSN order.
2186 if (hdr
->opcode
& ISCSI_OP_IMMEDIATE
) {
2187 int ret
= iscsit_execute_cmd(cmd
, 0);
2192 cmdsn_ret
= iscsit_sequence_cmd(conn
, cmd
, hdr
->cmdsn
);
2193 if (cmdsn_ret
== CMDSN_LOWER_THAN_EXP
) {
2195 } else if (cmdsn_ret
== CMDSN_ERROR_CANNOT_RECOVER
) {
2196 return iscsit_add_reject_from_cmd(
2197 ISCSI_REASON_PROTOCOL_ERROR
,
2202 return logout_remove
;
2205 static int iscsit_handle_snack(
2206 struct iscsi_conn
*conn
,
2211 struct iscsi_snack
*hdr
;
2213 hdr
= (struct iscsi_snack
*) buf
;
2214 hdr
->flags
&= ~ISCSI_FLAG_CMD_FINAL
;
2215 lun
= get_unaligned_le64(&hdr
->lun
);
2216 unpacked_lun
= scsilun_to_int((struct scsi_lun
*)&lun
);
2217 hdr
->itt
= be32_to_cpu(hdr
->itt
);
2218 hdr
->ttt
= be32_to_cpu(hdr
->ttt
);
2219 hdr
->exp_statsn
= be32_to_cpu(hdr
->exp_statsn
);
2220 hdr
->begrun
= be32_to_cpu(hdr
->begrun
);
2221 hdr
->runlength
= be32_to_cpu(hdr
->runlength
);
2223 pr_debug("Got ISCSI_INIT_SNACK, ITT: 0x%08x, ExpStatSN:"
2224 " 0x%08x, Type: 0x%02x, BegRun: 0x%08x, RunLength: 0x%08x,"
2225 " CID: %hu\n", hdr
->itt
, hdr
->exp_statsn
, hdr
->flags
,
2226 hdr
->begrun
, hdr
->runlength
, conn
->cid
);
2228 if (!conn
->sess
->sess_ops
->ErrorRecoveryLevel
) {
2229 pr_err("Initiator sent SNACK request while in"
2230 " ErrorRecoveryLevel=0.\n");
2231 return iscsit_add_reject(ISCSI_REASON_PROTOCOL_ERROR
, 1,
2235 * SNACK_DATA and SNACK_R2T are both 0, so check which function to
2236 * call from inside iscsi_send_recovery_datain_or_r2t().
2238 switch (hdr
->flags
& ISCSI_FLAG_SNACK_TYPE_MASK
) {
2240 return iscsit_handle_recovery_datain_or_r2t(conn
, buf
,
2241 hdr
->itt
, hdr
->ttt
, hdr
->begrun
, hdr
->runlength
);
2242 case ISCSI_FLAG_SNACK_TYPE_STATUS
:
2243 return iscsit_handle_status_snack(conn
, hdr
->itt
, hdr
->ttt
,
2244 hdr
->begrun
, hdr
->runlength
);
2245 case ISCSI_FLAG_SNACK_TYPE_DATA_ACK
:
2246 return iscsit_handle_data_ack(conn
, hdr
->ttt
, hdr
->begrun
,
2248 case ISCSI_FLAG_SNACK_TYPE_RDATA
:
2249 /* FIXME: Support R-Data SNACK */
2250 pr_err("R-Data SNACK Not Supported.\n");
2251 return iscsit_add_reject(ISCSI_REASON_PROTOCOL_ERROR
, 1,
2254 pr_err("Unknown SNACK type 0x%02x, protocol"
2255 " error.\n", hdr
->flags
& 0x0f);
2256 return iscsit_add_reject(ISCSI_REASON_PROTOCOL_ERROR
, 1,
2263 static void iscsit_rx_thread_wait_for_tcp(struct iscsi_conn
*conn
)
2265 if ((conn
->sock
->sk
->sk_shutdown
& SEND_SHUTDOWN
) ||
2266 (conn
->sock
->sk
->sk_shutdown
& RCV_SHUTDOWN
)) {
2267 wait_for_completion_interruptible_timeout(
2268 &conn
->rx_half_close_comp
,
2269 ISCSI_RX_THREAD_TCP_TIMEOUT
* HZ
);
2273 static int iscsit_handle_immediate_data(
2274 struct iscsi_cmd
*cmd
,
2278 int iov_ret
, rx_got
= 0, rx_size
= 0;
2279 u32 checksum
, iov_count
= 0, padding
= 0;
2280 struct iscsi_conn
*conn
= cmd
->conn
;
2283 iov_ret
= iscsit_map_iovec(cmd
, cmd
->iov_data
, cmd
->write_data_done
, length
);
2285 return IMMEDIATE_DATA_CANNOT_RECOVER
;
2288 iov_count
= iov_ret
;
2289 iov
= &cmd
->iov_data
[0];
2291 padding
= ((-length
) & 3);
2293 iov
[iov_count
].iov_base
= cmd
->pad_bytes
;
2294 iov
[iov_count
++].iov_len
= padding
;
2298 if (conn
->conn_ops
->DataDigest
) {
2299 iov
[iov_count
].iov_base
= &checksum
;
2300 iov
[iov_count
++].iov_len
= ISCSI_CRC_LEN
;
2301 rx_size
+= ISCSI_CRC_LEN
;
2304 rx_got
= rx_data(conn
, &cmd
->iov_data
[0], iov_count
, rx_size
);
2306 iscsit_unmap_iovec(cmd
);
2308 if (rx_got
!= rx_size
) {
2309 iscsit_rx_thread_wait_for_tcp(conn
);
2310 return IMMEDIATE_DATA_CANNOT_RECOVER
;
2313 if (conn
->conn_ops
->DataDigest
) {
2316 data_crc
= iscsit_do_crypto_hash_sg(&conn
->conn_rx_hash
, cmd
,
2317 cmd
->write_data_done
, length
, padding
,
2320 if (checksum
!= data_crc
) {
2321 pr_err("ImmediateData CRC32C DataDigest 0x%08x"
2322 " does not match computed 0x%08x\n", checksum
,
2325 if (!conn
->sess
->sess_ops
->ErrorRecoveryLevel
) {
2326 pr_err("Unable to recover from"
2327 " Immediate Data digest failure while"
2329 iscsit_add_reject_from_cmd(
2330 ISCSI_REASON_DATA_DIGEST_ERROR
,
2332 return IMMEDIATE_DATA_CANNOT_RECOVER
;
2334 iscsit_add_reject_from_cmd(
2335 ISCSI_REASON_DATA_DIGEST_ERROR
,
2337 return IMMEDIATE_DATA_ERL1_CRC_FAILURE
;
2340 pr_debug("Got CRC32C DataDigest 0x%08x for"
2341 " %u bytes of Immediate Data\n", checksum
,
2346 cmd
->write_data_done
+= length
;
2348 if (cmd
->write_data_done
== cmd
->data_length
) {
2349 spin_lock_bh(&cmd
->istate_lock
);
2350 cmd
->cmd_flags
|= ICF_GOT_LAST_DATAOUT
;
2351 cmd
->i_state
= ISTATE_RECEIVED_LAST_DATAOUT
;
2352 spin_unlock_bh(&cmd
->istate_lock
);
2355 return IMMEDIATE_DATA_NORMAL_OPERATION
;
2359 * Called with sess->conn_lock held.
2361 /* #warning iscsi_build_conn_drop_async_message() only sends out on connections
2362 with active network interface */
2363 static void iscsit_build_conn_drop_async_message(struct iscsi_conn
*conn
)
2365 struct iscsi_cmd
*cmd
;
2366 struct iscsi_conn
*conn_p
;
2369 * Only send a Asynchronous Message on connections whos network
2370 * interface is still functional.
2372 list_for_each_entry(conn_p
, &conn
->sess
->sess_conn_list
, conn_list
) {
2373 if (conn_p
->conn_state
== TARG_CONN_STATE_LOGGED_IN
) {
2374 iscsit_inc_conn_usage_count(conn_p
);
2382 cmd
= iscsit_allocate_cmd(conn_p
, GFP_KERNEL
);
2384 iscsit_dec_conn_usage_count(conn_p
);
2388 cmd
->logout_cid
= conn
->cid
;
2389 cmd
->iscsi_opcode
= ISCSI_OP_ASYNC_EVENT
;
2390 cmd
->i_state
= ISTATE_SEND_ASYNCMSG
;
2392 spin_lock_bh(&conn_p
->cmd_lock
);
2393 list_add_tail(&cmd
->i_list
, &conn_p
->conn_cmd_list
);
2394 spin_unlock_bh(&conn_p
->cmd_lock
);
2396 iscsit_add_cmd_to_response_queue(cmd
, conn_p
, cmd
->i_state
);
2397 iscsit_dec_conn_usage_count(conn_p
);
2400 static int iscsit_send_conn_drop_async_message(
2401 struct iscsi_cmd
*cmd
,
2402 struct iscsi_conn
*conn
)
2404 struct iscsi_async
*hdr
;
2406 cmd
->tx_size
= ISCSI_HDR_LEN
;
2407 cmd
->iscsi_opcode
= ISCSI_OP_ASYNC_EVENT
;
2409 hdr
= (struct iscsi_async
*) cmd
->pdu
;
2410 hdr
->opcode
= ISCSI_OP_ASYNC_EVENT
;
2411 hdr
->flags
= ISCSI_FLAG_CMD_FINAL
;
2412 cmd
->init_task_tag
= 0xFFFFFFFF;
2413 cmd
->targ_xfer_tag
= 0xFFFFFFFF;
2414 put_unaligned_be64(0xFFFFFFFFFFFFFFFFULL
, &hdr
->rsvd4
[0]);
2415 cmd
->stat_sn
= conn
->stat_sn
++;
2416 hdr
->statsn
= cpu_to_be32(cmd
->stat_sn
);
2417 hdr
->exp_cmdsn
= cpu_to_be32(conn
->sess
->exp_cmd_sn
);
2418 hdr
->max_cmdsn
= cpu_to_be32(conn
->sess
->max_cmd_sn
);
2419 hdr
->async_event
= ISCSI_ASYNC_MSG_DROPPING_CONNECTION
;
2420 hdr
->param1
= cpu_to_be16(cmd
->logout_cid
);
2421 hdr
->param2
= cpu_to_be16(conn
->sess
->sess_ops
->DefaultTime2Wait
);
2422 hdr
->param3
= cpu_to_be16(conn
->sess
->sess_ops
->DefaultTime2Retain
);
2424 if (conn
->conn_ops
->HeaderDigest
) {
2425 u32
*header_digest
= (u32
*)&cmd
->pdu
[ISCSI_HDR_LEN
];
2427 iscsit_do_crypto_hash_buf(&conn
->conn_tx_hash
,
2428 (unsigned char *)hdr
, ISCSI_HDR_LEN
,
2429 0, NULL
, (u8
*)header_digest
);
2431 cmd
->tx_size
+= ISCSI_CRC_LEN
;
2432 pr_debug("Attaching CRC32C HeaderDigest to"
2433 " Async Message 0x%08x\n", *header_digest
);
2436 cmd
->iov_misc
[0].iov_base
= cmd
->pdu
;
2437 cmd
->iov_misc
[0].iov_len
= cmd
->tx_size
;
2438 cmd
->iov_misc_count
= 1;
2440 pr_debug("Sending Connection Dropped Async Message StatSN:"
2441 " 0x%08x, for CID: %hu on CID: %hu\n", cmd
->stat_sn
,
2442 cmd
->logout_cid
, conn
->cid
);
2446 static int iscsit_send_data_in(
2447 struct iscsi_cmd
*cmd
,
2448 struct iscsi_conn
*conn
,
2451 int iov_ret
= 0, set_statsn
= 0;
2452 u32 iov_count
= 0, tx_size
= 0;
2453 struct iscsi_datain datain
;
2454 struct iscsi_datain_req
*dr
;
2455 struct iscsi_data_rsp
*hdr
;
2458 memset(&datain
, 0, sizeof(struct iscsi_datain
));
2459 dr
= iscsit_get_datain_values(cmd
, &datain
);
2461 pr_err("iscsit_get_datain_values failed for ITT: 0x%08x\n",
2462 cmd
->init_task_tag
);
2467 * Be paranoid and double check the logic for now.
2469 if ((datain
.offset
+ datain
.length
) > cmd
->data_length
) {
2470 pr_err("Command ITT: 0x%08x, datain.offset: %u and"
2471 " datain.length: %u exceeds cmd->data_length: %u\n",
2472 cmd
->init_task_tag
, datain
.offset
, datain
.length
,
2477 spin_lock_bh(&conn
->sess
->session_stats_lock
);
2478 conn
->sess
->tx_data_octets
+= datain
.length
;
2479 if (conn
->sess
->se_sess
->se_node_acl
) {
2480 spin_lock(&conn
->sess
->se_sess
->se_node_acl
->stats_lock
);
2481 conn
->sess
->se_sess
->se_node_acl
->read_bytes
+= datain
.length
;
2482 spin_unlock(&conn
->sess
->se_sess
->se_node_acl
->stats_lock
);
2484 spin_unlock_bh(&conn
->sess
->session_stats_lock
);
2486 * Special case for successfully execution w/ both DATAIN
2489 if ((datain
.flags
& ISCSI_FLAG_DATA_STATUS
) &&
2490 (cmd
->se_cmd
.se_cmd_flags
& SCF_TRANSPORT_TASK_SENSE
))
2491 datain
.flags
&= ~ISCSI_FLAG_DATA_STATUS
;
2493 if ((dr
->dr_complete
== DATAIN_COMPLETE_NORMAL
) ||
2494 (dr
->dr_complete
== DATAIN_COMPLETE_CONNECTION_RECOVERY
)) {
2495 iscsit_increment_maxcmdsn(cmd
, conn
->sess
);
2496 cmd
->stat_sn
= conn
->stat_sn
++;
2498 } else if (dr
->dr_complete
==
2499 DATAIN_COMPLETE_WITHIN_COMMAND_RECOVERY
)
2503 hdr
= (struct iscsi_data_rsp
*) cmd
->pdu
;
2504 memset(hdr
, 0, ISCSI_HDR_LEN
);
2505 hdr
->opcode
= ISCSI_OP_SCSI_DATA_IN
;
2506 hdr
->flags
= datain
.flags
;
2507 if (hdr
->flags
& ISCSI_FLAG_DATA_STATUS
) {
2508 if (cmd
->se_cmd
.se_cmd_flags
& SCF_OVERFLOW_BIT
) {
2509 hdr
->flags
|= ISCSI_FLAG_DATA_OVERFLOW
;
2510 hdr
->residual_count
= cpu_to_be32(cmd
->se_cmd
.residual_count
);
2511 } else if (cmd
->se_cmd
.se_cmd_flags
& SCF_UNDERFLOW_BIT
) {
2512 hdr
->flags
|= ISCSI_FLAG_DATA_UNDERFLOW
;
2513 hdr
->residual_count
= cpu_to_be32(cmd
->se_cmd
.residual_count
);
2516 hton24(hdr
->dlength
, datain
.length
);
2517 if (hdr
->flags
& ISCSI_FLAG_DATA_ACK
)
2518 int_to_scsilun(cmd
->se_cmd
.orig_fe_lun
,
2519 (struct scsi_lun
*)&hdr
->lun
);
2521 put_unaligned_le64(0xFFFFFFFFFFFFFFFFULL
, &hdr
->lun
);
2523 hdr
->itt
= cpu_to_be32(cmd
->init_task_tag
);
2524 hdr
->ttt
= (hdr
->flags
& ISCSI_FLAG_DATA_ACK
) ?
2525 cpu_to_be32(cmd
->targ_xfer_tag
) :
2527 hdr
->statsn
= (set_statsn
) ? cpu_to_be32(cmd
->stat_sn
) :
2529 hdr
->exp_cmdsn
= cpu_to_be32(conn
->sess
->exp_cmd_sn
);
2530 hdr
->max_cmdsn
= cpu_to_be32(conn
->sess
->max_cmd_sn
);
2531 hdr
->datasn
= cpu_to_be32(datain
.data_sn
);
2532 hdr
->offset
= cpu_to_be32(datain
.offset
);
2534 iov
= &cmd
->iov_data
[0];
2535 iov
[iov_count
].iov_base
= cmd
->pdu
;
2536 iov
[iov_count
++].iov_len
= ISCSI_HDR_LEN
;
2537 tx_size
+= ISCSI_HDR_LEN
;
2539 if (conn
->conn_ops
->HeaderDigest
) {
2540 u32
*header_digest
= (u32
*)&cmd
->pdu
[ISCSI_HDR_LEN
];
2542 iscsit_do_crypto_hash_buf(&conn
->conn_tx_hash
,
2543 (unsigned char *)hdr
, ISCSI_HDR_LEN
,
2544 0, NULL
, (u8
*)header_digest
);
2546 iov
[0].iov_len
+= ISCSI_CRC_LEN
;
2547 tx_size
+= ISCSI_CRC_LEN
;
2549 pr_debug("Attaching CRC32 HeaderDigest"
2550 " for DataIN PDU 0x%08x\n", *header_digest
);
2553 iov_ret
= iscsit_map_iovec(cmd
, &cmd
->iov_data
[1], datain
.offset
, datain
.length
);
2557 iov_count
+= iov_ret
;
2558 tx_size
+= datain
.length
;
2560 cmd
->padding
= ((-datain
.length
) & 3);
2562 iov
[iov_count
].iov_base
= cmd
->pad_bytes
;
2563 iov
[iov_count
++].iov_len
= cmd
->padding
;
2564 tx_size
+= cmd
->padding
;
2566 pr_debug("Attaching %u padding bytes\n",
2569 if (conn
->conn_ops
->DataDigest
) {
2570 cmd
->data_crc
= iscsit_do_crypto_hash_sg(&conn
->conn_tx_hash
, cmd
,
2571 datain
.offset
, datain
.length
, cmd
->padding
, cmd
->pad_bytes
);
2573 iov
[iov_count
].iov_base
= &cmd
->data_crc
;
2574 iov
[iov_count
++].iov_len
= ISCSI_CRC_LEN
;
2575 tx_size
+= ISCSI_CRC_LEN
;
2577 pr_debug("Attached CRC32C DataDigest %d bytes, crc"
2578 " 0x%08x\n", datain
.length
+cmd
->padding
, cmd
->data_crc
);
2581 cmd
->iov_data_count
= iov_count
;
2582 cmd
->tx_size
= tx_size
;
2584 pr_debug("Built DataIN ITT: 0x%08x, StatSN: 0x%08x,"
2585 " DataSN: 0x%08x, Offset: %u, Length: %u, CID: %hu\n",
2586 cmd
->init_task_tag
, ntohl(hdr
->statsn
), ntohl(hdr
->datasn
),
2587 ntohl(hdr
->offset
), datain
.length
, conn
->cid
);
2589 if (dr
->dr_complete
) {
2590 *eodr
= (cmd
->se_cmd
.se_cmd_flags
& SCF_TRANSPORT_TASK_SENSE
) ?
2592 iscsit_free_datain_req(cmd
, dr
);
2598 static int iscsit_send_logout_response(
2599 struct iscsi_cmd
*cmd
,
2600 struct iscsi_conn
*conn
)
2602 int niov
= 0, tx_size
;
2603 struct iscsi_conn
*logout_conn
= NULL
;
2604 struct iscsi_conn_recovery
*cr
= NULL
;
2605 struct iscsi_session
*sess
= conn
->sess
;
2607 struct iscsi_logout_rsp
*hdr
;
2609 * The actual shutting down of Sessions and/or Connections
2610 * for CLOSESESSION and CLOSECONNECTION Logout Requests
2611 * is done in scsi_logout_post_handler().
2613 switch (cmd
->logout_reason
) {
2614 case ISCSI_LOGOUT_REASON_CLOSE_SESSION
:
2615 pr_debug("iSCSI session logout successful, setting"
2616 " logout response to ISCSI_LOGOUT_SUCCESS.\n");
2617 cmd
->logout_response
= ISCSI_LOGOUT_SUCCESS
;
2619 case ISCSI_LOGOUT_REASON_CLOSE_CONNECTION
:
2620 if (cmd
->logout_response
== ISCSI_LOGOUT_CID_NOT_FOUND
)
2623 * For CLOSECONNECTION logout requests carrying
2624 * a matching logout CID -> local CID, the reference
2625 * for the local CID will have been incremented in
2626 * iscsi_logout_closeconnection().
2628 * For CLOSECONNECTION logout requests carrying
2629 * a different CID than the connection it arrived
2630 * on, the connection responding to cmd->logout_cid
2631 * is stopped in iscsit_logout_post_handler_diffcid().
2634 pr_debug("iSCSI CID: %hu logout on CID: %hu"
2635 " successful.\n", cmd
->logout_cid
, conn
->cid
);
2636 cmd
->logout_response
= ISCSI_LOGOUT_SUCCESS
;
2638 case ISCSI_LOGOUT_REASON_RECOVERY
:
2639 if ((cmd
->logout_response
== ISCSI_LOGOUT_RECOVERY_UNSUPPORTED
) ||
2640 (cmd
->logout_response
== ISCSI_LOGOUT_CLEANUP_FAILED
))
2643 * If the connection is still active from our point of view
2644 * force connection recovery to occur.
2646 logout_conn
= iscsit_get_conn_from_cid_rcfr(sess
,
2648 if ((logout_conn
)) {
2649 iscsit_connection_reinstatement_rcfr(logout_conn
);
2650 iscsit_dec_conn_usage_count(logout_conn
);
2653 cr
= iscsit_get_inactive_connection_recovery_entry(
2654 conn
->sess
, cmd
->logout_cid
);
2656 pr_err("Unable to locate CID: %hu for"
2657 " REMOVECONNFORRECOVERY Logout Request.\n",
2659 cmd
->logout_response
= ISCSI_LOGOUT_CID_NOT_FOUND
;
2663 iscsit_discard_cr_cmds_by_expstatsn(cr
, cmd
->exp_stat_sn
);
2665 pr_debug("iSCSI REMOVECONNFORRECOVERY logout"
2666 " for recovery for CID: %hu on CID: %hu successful.\n",
2667 cmd
->logout_cid
, conn
->cid
);
2668 cmd
->logout_response
= ISCSI_LOGOUT_SUCCESS
;
2671 pr_err("Unknown cmd->logout_reason: 0x%02x\n",
2672 cmd
->logout_reason
);
2676 tx_size
= ISCSI_HDR_LEN
;
2677 hdr
= (struct iscsi_logout_rsp
*)cmd
->pdu
;
2678 memset(hdr
, 0, ISCSI_HDR_LEN
);
2679 hdr
->opcode
= ISCSI_OP_LOGOUT_RSP
;
2680 hdr
->flags
|= ISCSI_FLAG_CMD_FINAL
;
2681 hdr
->response
= cmd
->logout_response
;
2682 hdr
->itt
= cpu_to_be32(cmd
->init_task_tag
);
2683 cmd
->stat_sn
= conn
->stat_sn
++;
2684 hdr
->statsn
= cpu_to_be32(cmd
->stat_sn
);
2686 iscsit_increment_maxcmdsn(cmd
, conn
->sess
);
2687 hdr
->exp_cmdsn
= cpu_to_be32(conn
->sess
->exp_cmd_sn
);
2688 hdr
->max_cmdsn
= cpu_to_be32(conn
->sess
->max_cmd_sn
);
2690 iov
= &cmd
->iov_misc
[0];
2691 iov
[niov
].iov_base
= cmd
->pdu
;
2692 iov
[niov
++].iov_len
= ISCSI_HDR_LEN
;
2694 if (conn
->conn_ops
->HeaderDigest
) {
2695 u32
*header_digest
= (u32
*)&cmd
->pdu
[ISCSI_HDR_LEN
];
2697 iscsit_do_crypto_hash_buf(&conn
->conn_tx_hash
,
2698 (unsigned char *)hdr
, ISCSI_HDR_LEN
,
2699 0, NULL
, (u8
*)header_digest
);
2701 iov
[0].iov_len
+= ISCSI_CRC_LEN
;
2702 tx_size
+= ISCSI_CRC_LEN
;
2703 pr_debug("Attaching CRC32C HeaderDigest to"
2704 " Logout Response 0x%08x\n", *header_digest
);
2706 cmd
->iov_misc_count
= niov
;
2707 cmd
->tx_size
= tx_size
;
2709 pr_debug("Sending Logout Response ITT: 0x%08x StatSN:"
2710 " 0x%08x Response: 0x%02x CID: %hu on CID: %hu\n",
2711 cmd
->init_task_tag
, cmd
->stat_sn
, hdr
->response
,
2712 cmd
->logout_cid
, conn
->cid
);
2718 * Unsolicited NOPIN, either requesting a response or not.
2720 static int iscsit_send_unsolicited_nopin(
2721 struct iscsi_cmd
*cmd
,
2722 struct iscsi_conn
*conn
,
2725 int tx_size
= ISCSI_HDR_LEN
;
2726 struct iscsi_nopin
*hdr
;
2728 hdr
= (struct iscsi_nopin
*) cmd
->pdu
;
2729 memset(hdr
, 0, ISCSI_HDR_LEN
);
2730 hdr
->opcode
= ISCSI_OP_NOOP_IN
;
2731 hdr
->flags
|= ISCSI_FLAG_CMD_FINAL
;
2732 hdr
->itt
= cpu_to_be32(cmd
->init_task_tag
);
2733 hdr
->ttt
= cpu_to_be32(cmd
->targ_xfer_tag
);
2734 cmd
->stat_sn
= conn
->stat_sn
;
2735 hdr
->statsn
= cpu_to_be32(cmd
->stat_sn
);
2736 hdr
->exp_cmdsn
= cpu_to_be32(conn
->sess
->exp_cmd_sn
);
2737 hdr
->max_cmdsn
= cpu_to_be32(conn
->sess
->max_cmd_sn
);
2739 if (conn
->conn_ops
->HeaderDigest
) {
2740 u32
*header_digest
= (u32
*)&cmd
->pdu
[ISCSI_HDR_LEN
];
2742 iscsit_do_crypto_hash_buf(&conn
->conn_tx_hash
,
2743 (unsigned char *)hdr
, ISCSI_HDR_LEN
,
2744 0, NULL
, (u8
*)header_digest
);
2746 tx_size
+= ISCSI_CRC_LEN
;
2747 pr_debug("Attaching CRC32C HeaderDigest to"
2748 " NopIN 0x%08x\n", *header_digest
);
2751 cmd
->iov_misc
[0].iov_base
= cmd
->pdu
;
2752 cmd
->iov_misc
[0].iov_len
= tx_size
;
2753 cmd
->iov_misc_count
= 1;
2754 cmd
->tx_size
= tx_size
;
2756 pr_debug("Sending Unsolicited NOPIN TTT: 0x%08x StatSN:"
2757 " 0x%08x CID: %hu\n", hdr
->ttt
, cmd
->stat_sn
, conn
->cid
);
2762 static int iscsit_send_nopin_response(
2763 struct iscsi_cmd
*cmd
,
2764 struct iscsi_conn
*conn
)
2766 int niov
= 0, tx_size
;
2769 struct iscsi_nopin
*hdr
;
2771 tx_size
= ISCSI_HDR_LEN
;
2772 hdr
= (struct iscsi_nopin
*) cmd
->pdu
;
2773 memset(hdr
, 0, ISCSI_HDR_LEN
);
2774 hdr
->opcode
= ISCSI_OP_NOOP_IN
;
2775 hdr
->flags
|= ISCSI_FLAG_CMD_FINAL
;
2776 hton24(hdr
->dlength
, cmd
->buf_ptr_size
);
2777 put_unaligned_le64(0xFFFFFFFFFFFFFFFFULL
, &hdr
->lun
);
2778 hdr
->itt
= cpu_to_be32(cmd
->init_task_tag
);
2779 hdr
->ttt
= cpu_to_be32(cmd
->targ_xfer_tag
);
2780 cmd
->stat_sn
= conn
->stat_sn
++;
2781 hdr
->statsn
= cpu_to_be32(cmd
->stat_sn
);
2783 iscsit_increment_maxcmdsn(cmd
, conn
->sess
);
2784 hdr
->exp_cmdsn
= cpu_to_be32(conn
->sess
->exp_cmd_sn
);
2785 hdr
->max_cmdsn
= cpu_to_be32(conn
->sess
->max_cmd_sn
);
2787 iov
= &cmd
->iov_misc
[0];
2788 iov
[niov
].iov_base
= cmd
->pdu
;
2789 iov
[niov
++].iov_len
= ISCSI_HDR_LEN
;
2791 if (conn
->conn_ops
->HeaderDigest
) {
2792 u32
*header_digest
= (u32
*)&cmd
->pdu
[ISCSI_HDR_LEN
];
2794 iscsit_do_crypto_hash_buf(&conn
->conn_tx_hash
,
2795 (unsigned char *)hdr
, ISCSI_HDR_LEN
,
2796 0, NULL
, (u8
*)header_digest
);
2798 iov
[0].iov_len
+= ISCSI_CRC_LEN
;
2799 tx_size
+= ISCSI_CRC_LEN
;
2800 pr_debug("Attaching CRC32C HeaderDigest"
2801 " to NopIn 0x%08x\n", *header_digest
);
2805 * NOPOUT Ping Data is attached to struct iscsi_cmd->buf_ptr.
2806 * NOPOUT DataSegmentLength is at struct iscsi_cmd->buf_ptr_size.
2808 if (cmd
->buf_ptr_size
) {
2809 iov
[niov
].iov_base
= cmd
->buf_ptr
;
2810 iov
[niov
++].iov_len
= cmd
->buf_ptr_size
;
2811 tx_size
+= cmd
->buf_ptr_size
;
2813 pr_debug("Echoing back %u bytes of ping"
2814 " data.\n", cmd
->buf_ptr_size
);
2816 padding
= ((-cmd
->buf_ptr_size
) & 3);
2818 iov
[niov
].iov_base
= &cmd
->pad_bytes
;
2819 iov
[niov
++].iov_len
= padding
;
2821 pr_debug("Attaching %u additional"
2822 " padding bytes.\n", padding
);
2824 if (conn
->conn_ops
->DataDigest
) {
2825 iscsit_do_crypto_hash_buf(&conn
->conn_tx_hash
,
2826 cmd
->buf_ptr
, cmd
->buf_ptr_size
,
2827 padding
, (u8
*)&cmd
->pad_bytes
,
2828 (u8
*)&cmd
->data_crc
);
2830 iov
[niov
].iov_base
= &cmd
->data_crc
;
2831 iov
[niov
++].iov_len
= ISCSI_CRC_LEN
;
2832 tx_size
+= ISCSI_CRC_LEN
;
2833 pr_debug("Attached DataDigest for %u"
2834 " bytes of ping data, CRC 0x%08x\n",
2835 cmd
->buf_ptr_size
, cmd
->data_crc
);
2839 cmd
->iov_misc_count
= niov
;
2840 cmd
->tx_size
= tx_size
;
2842 pr_debug("Sending NOPIN Response ITT: 0x%08x, TTT:"
2843 " 0x%08x, StatSN: 0x%08x, Length %u\n", cmd
->init_task_tag
,
2844 cmd
->targ_xfer_tag
, cmd
->stat_sn
, cmd
->buf_ptr_size
);
2849 int iscsit_send_r2t(
2850 struct iscsi_cmd
*cmd
,
2851 struct iscsi_conn
*conn
)
2854 struct iscsi_r2t
*r2t
;
2855 struct iscsi_r2t_rsp
*hdr
;
2857 r2t
= iscsit_get_r2t_from_list(cmd
);
2861 hdr
= (struct iscsi_r2t_rsp
*) cmd
->pdu
;
2862 memset(hdr
, 0, ISCSI_HDR_LEN
);
2863 hdr
->opcode
= ISCSI_OP_R2T
;
2864 hdr
->flags
|= ISCSI_FLAG_CMD_FINAL
;
2865 int_to_scsilun(cmd
->se_cmd
.orig_fe_lun
,
2866 (struct scsi_lun
*)&hdr
->lun
);
2867 hdr
->itt
= cpu_to_be32(cmd
->init_task_tag
);
2868 spin_lock_bh(&conn
->sess
->ttt_lock
);
2869 r2t
->targ_xfer_tag
= conn
->sess
->targ_xfer_tag
++;
2870 if (r2t
->targ_xfer_tag
== 0xFFFFFFFF)
2871 r2t
->targ_xfer_tag
= conn
->sess
->targ_xfer_tag
++;
2872 spin_unlock_bh(&conn
->sess
->ttt_lock
);
2873 hdr
->ttt
= cpu_to_be32(r2t
->targ_xfer_tag
);
2874 hdr
->statsn
= cpu_to_be32(conn
->stat_sn
);
2875 hdr
->exp_cmdsn
= cpu_to_be32(conn
->sess
->exp_cmd_sn
);
2876 hdr
->max_cmdsn
= cpu_to_be32(conn
->sess
->max_cmd_sn
);
2877 hdr
->r2tsn
= cpu_to_be32(r2t
->r2t_sn
);
2878 hdr
->data_offset
= cpu_to_be32(r2t
->offset
);
2879 hdr
->data_length
= cpu_to_be32(r2t
->xfer_len
);
2881 cmd
->iov_misc
[0].iov_base
= cmd
->pdu
;
2882 cmd
->iov_misc
[0].iov_len
= ISCSI_HDR_LEN
;
2883 tx_size
+= ISCSI_HDR_LEN
;
2885 if (conn
->conn_ops
->HeaderDigest
) {
2886 u32
*header_digest
= (u32
*)&cmd
->pdu
[ISCSI_HDR_LEN
];
2888 iscsit_do_crypto_hash_buf(&conn
->conn_tx_hash
,
2889 (unsigned char *)hdr
, ISCSI_HDR_LEN
,
2890 0, NULL
, (u8
*)header_digest
);
2892 cmd
->iov_misc
[0].iov_len
+= ISCSI_CRC_LEN
;
2893 tx_size
+= ISCSI_CRC_LEN
;
2894 pr_debug("Attaching CRC32 HeaderDigest for R2T"
2895 " PDU 0x%08x\n", *header_digest
);
2898 pr_debug("Built %sR2T, ITT: 0x%08x, TTT: 0x%08x, StatSN:"
2899 " 0x%08x, R2TSN: 0x%08x, Offset: %u, DDTL: %u, CID: %hu\n",
2900 (!r2t
->recovery_r2t
) ? "" : "Recovery ", cmd
->init_task_tag
,
2901 r2t
->targ_xfer_tag
, ntohl(hdr
->statsn
), r2t
->r2t_sn
,
2902 r2t
->offset
, r2t
->xfer_len
, conn
->cid
);
2904 cmd
->iov_misc_count
= 1;
2905 cmd
->tx_size
= tx_size
;
2907 spin_lock_bh(&cmd
->r2t_lock
);
2909 spin_unlock_bh(&cmd
->r2t_lock
);
2915 * type 0: Normal Operation.
2916 * type 1: Called from Storage Transport.
2917 * type 2: Called from iscsi_task_reassign_complete_write() for
2918 * connection recovery.
2920 int iscsit_build_r2ts_for_cmd(
2921 struct iscsi_cmd
*cmd
,
2922 struct iscsi_conn
*conn
,
2926 u32 offset
= 0, xfer_len
= 0;
2928 spin_lock_bh(&cmd
->r2t_lock
);
2929 if (cmd
->cmd_flags
& ICF_SENT_LAST_R2T
) {
2930 spin_unlock_bh(&cmd
->r2t_lock
);
2934 if (conn
->sess
->sess_ops
->DataSequenceInOrder
&& (type
!= 2))
2935 if (cmd
->r2t_offset
< cmd
->write_data_done
)
2936 cmd
->r2t_offset
= cmd
->write_data_done
;
2938 while (cmd
->outstanding_r2ts
< conn
->sess
->sess_ops
->MaxOutstandingR2T
) {
2939 if (conn
->sess
->sess_ops
->DataSequenceInOrder
) {
2940 offset
= cmd
->r2t_offset
;
2942 if (first_r2t
&& (type
== 2)) {
2943 xfer_len
= ((offset
+
2944 (conn
->sess
->sess_ops
->MaxBurstLength
-
2945 cmd
->next_burst_len
) >
2947 (cmd
->data_length
- offset
) :
2948 (conn
->sess
->sess_ops
->MaxBurstLength
-
2949 cmd
->next_burst_len
));
2951 xfer_len
= ((offset
+
2952 conn
->sess
->sess_ops
->MaxBurstLength
) >
2954 (cmd
->data_length
- offset
) :
2955 conn
->sess
->sess_ops
->MaxBurstLength
;
2957 cmd
->r2t_offset
+= xfer_len
;
2959 if (cmd
->r2t_offset
== cmd
->data_length
)
2960 cmd
->cmd_flags
|= ICF_SENT_LAST_R2T
;
2962 struct iscsi_seq
*seq
;
2964 seq
= iscsit_get_seq_holder_for_r2t(cmd
);
2966 spin_unlock_bh(&cmd
->r2t_lock
);
2970 offset
= seq
->offset
;
2971 xfer_len
= seq
->xfer_len
;
2973 if (cmd
->seq_send_order
== cmd
->seq_count
)
2974 cmd
->cmd_flags
|= ICF_SENT_LAST_R2T
;
2976 cmd
->outstanding_r2ts
++;
2979 if (iscsit_add_r2t_to_list(cmd
, offset
, xfer_len
, 0, 0) < 0) {
2980 spin_unlock_bh(&cmd
->r2t_lock
);
2984 if (cmd
->cmd_flags
& ICF_SENT_LAST_R2T
)
2987 spin_unlock_bh(&cmd
->r2t_lock
);
2992 static int iscsit_send_status(
2993 struct iscsi_cmd
*cmd
,
2994 struct iscsi_conn
*conn
)
2996 u8 iov_count
= 0, recovery
;
2997 u32 padding
= 0, tx_size
= 0;
2998 struct iscsi_scsi_rsp
*hdr
;
3001 recovery
= (cmd
->i_state
!= ISTATE_SEND_STATUS
);
3003 cmd
->stat_sn
= conn
->stat_sn
++;
3005 spin_lock_bh(&conn
->sess
->session_stats_lock
);
3006 conn
->sess
->rsp_pdus
++;
3007 spin_unlock_bh(&conn
->sess
->session_stats_lock
);
3009 hdr
= (struct iscsi_scsi_rsp
*) cmd
->pdu
;
3010 memset(hdr
, 0, ISCSI_HDR_LEN
);
3011 hdr
->opcode
= ISCSI_OP_SCSI_CMD_RSP
;
3012 hdr
->flags
|= ISCSI_FLAG_CMD_FINAL
;
3013 if (cmd
->se_cmd
.se_cmd_flags
& SCF_OVERFLOW_BIT
) {
3014 hdr
->flags
|= ISCSI_FLAG_CMD_OVERFLOW
;
3015 hdr
->residual_count
= cpu_to_be32(cmd
->se_cmd
.residual_count
);
3016 } else if (cmd
->se_cmd
.se_cmd_flags
& SCF_UNDERFLOW_BIT
) {
3017 hdr
->flags
|= ISCSI_FLAG_CMD_UNDERFLOW
;
3018 hdr
->residual_count
= cpu_to_be32(cmd
->se_cmd
.residual_count
);
3020 hdr
->response
= cmd
->iscsi_response
;
3021 hdr
->cmd_status
= cmd
->se_cmd
.scsi_status
;
3022 hdr
->itt
= cpu_to_be32(cmd
->init_task_tag
);
3023 hdr
->statsn
= cpu_to_be32(cmd
->stat_sn
);
3025 iscsit_increment_maxcmdsn(cmd
, conn
->sess
);
3026 hdr
->exp_cmdsn
= cpu_to_be32(conn
->sess
->exp_cmd_sn
);
3027 hdr
->max_cmdsn
= cpu_to_be32(conn
->sess
->max_cmd_sn
);
3029 iov
= &cmd
->iov_misc
[0];
3030 iov
[iov_count
].iov_base
= cmd
->pdu
;
3031 iov
[iov_count
++].iov_len
= ISCSI_HDR_LEN
;
3032 tx_size
+= ISCSI_HDR_LEN
;
3035 * Attach SENSE DATA payload to iSCSI Response PDU
3037 if (cmd
->se_cmd
.sense_buffer
&&
3038 ((cmd
->se_cmd
.se_cmd_flags
& SCF_TRANSPORT_TASK_SENSE
) ||
3039 (cmd
->se_cmd
.se_cmd_flags
& SCF_EMULATED_TASK_SENSE
))) {
3040 padding
= -(cmd
->se_cmd
.scsi_sense_length
) & 3;
3041 hton24(hdr
->dlength
, cmd
->se_cmd
.scsi_sense_length
);
3042 iov
[iov_count
].iov_base
= cmd
->se_cmd
.sense_buffer
;
3043 iov
[iov_count
++].iov_len
=
3044 (cmd
->se_cmd
.scsi_sense_length
+ padding
);
3045 tx_size
+= cmd
->se_cmd
.scsi_sense_length
;
3048 memset(cmd
->se_cmd
.sense_buffer
+
3049 cmd
->se_cmd
.scsi_sense_length
, 0, padding
);
3051 pr_debug("Adding %u bytes of padding to"
3052 " SENSE.\n", padding
);
3055 if (conn
->conn_ops
->DataDigest
) {
3056 iscsit_do_crypto_hash_buf(&conn
->conn_tx_hash
,
3057 cmd
->se_cmd
.sense_buffer
,
3058 (cmd
->se_cmd
.scsi_sense_length
+ padding
),
3059 0, NULL
, (u8
*)&cmd
->data_crc
);
3061 iov
[iov_count
].iov_base
= &cmd
->data_crc
;
3062 iov
[iov_count
++].iov_len
= ISCSI_CRC_LEN
;
3063 tx_size
+= ISCSI_CRC_LEN
;
3065 pr_debug("Attaching CRC32 DataDigest for"
3066 " SENSE, %u bytes CRC 0x%08x\n",
3067 (cmd
->se_cmd
.scsi_sense_length
+ padding
),
3071 pr_debug("Attaching SENSE DATA: %u bytes to iSCSI"
3073 cmd
->se_cmd
.scsi_sense_length
);
3076 if (conn
->conn_ops
->HeaderDigest
) {
3077 u32
*header_digest
= (u32
*)&cmd
->pdu
[ISCSI_HDR_LEN
];
3079 iscsit_do_crypto_hash_buf(&conn
->conn_tx_hash
,
3080 (unsigned char *)hdr
, ISCSI_HDR_LEN
,
3081 0, NULL
, (u8
*)header_digest
);
3083 iov
[0].iov_len
+= ISCSI_CRC_LEN
;
3084 tx_size
+= ISCSI_CRC_LEN
;
3085 pr_debug("Attaching CRC32 HeaderDigest for Response"
3086 " PDU 0x%08x\n", *header_digest
);
3089 cmd
->iov_misc_count
= iov_count
;
3090 cmd
->tx_size
= tx_size
;
3092 pr_debug("Built %sSCSI Response, ITT: 0x%08x, StatSN: 0x%08x,"
3093 " Response: 0x%02x, SAM Status: 0x%02x, CID: %hu\n",
3094 (!recovery
) ? "" : "Recovery ", cmd
->init_task_tag
,
3095 cmd
->stat_sn
, 0x00, cmd
->se_cmd
.scsi_status
, conn
->cid
);
3100 static u8
iscsit_convert_tcm_tmr_rsp(struct se_tmr_req
*se_tmr
)
3102 switch (se_tmr
->response
) {
3103 case TMR_FUNCTION_COMPLETE
:
3104 return ISCSI_TMF_RSP_COMPLETE
;
3105 case TMR_TASK_DOES_NOT_EXIST
:
3106 return ISCSI_TMF_RSP_NO_TASK
;
3107 case TMR_LUN_DOES_NOT_EXIST
:
3108 return ISCSI_TMF_RSP_NO_LUN
;
3109 case TMR_TASK_MGMT_FUNCTION_NOT_SUPPORTED
:
3110 return ISCSI_TMF_RSP_NOT_SUPPORTED
;
3111 case TMR_FUNCTION_AUTHORIZATION_FAILED
:
3112 return ISCSI_TMF_RSP_AUTH_FAILED
;
3113 case TMR_FUNCTION_REJECTED
:
3115 return ISCSI_TMF_RSP_REJECTED
;
3119 static int iscsit_send_task_mgt_rsp(
3120 struct iscsi_cmd
*cmd
,
3121 struct iscsi_conn
*conn
)
3123 struct se_tmr_req
*se_tmr
= cmd
->se_cmd
.se_tmr_req
;
3124 struct iscsi_tm_rsp
*hdr
;
3127 hdr
= (struct iscsi_tm_rsp
*) cmd
->pdu
;
3128 memset(hdr
, 0, ISCSI_HDR_LEN
);
3129 hdr
->opcode
= ISCSI_OP_SCSI_TMFUNC_RSP
;
3130 hdr
->flags
= ISCSI_FLAG_CMD_FINAL
;
3131 hdr
->response
= iscsit_convert_tcm_tmr_rsp(se_tmr
);
3132 hdr
->itt
= cpu_to_be32(cmd
->init_task_tag
);
3133 cmd
->stat_sn
= conn
->stat_sn
++;
3134 hdr
->statsn
= cpu_to_be32(cmd
->stat_sn
);
3136 iscsit_increment_maxcmdsn(cmd
, conn
->sess
);
3137 hdr
->exp_cmdsn
= cpu_to_be32(conn
->sess
->exp_cmd_sn
);
3138 hdr
->max_cmdsn
= cpu_to_be32(conn
->sess
->max_cmd_sn
);
3140 cmd
->iov_misc
[0].iov_base
= cmd
->pdu
;
3141 cmd
->iov_misc
[0].iov_len
= ISCSI_HDR_LEN
;
3142 tx_size
+= ISCSI_HDR_LEN
;
3144 if (conn
->conn_ops
->HeaderDigest
) {
3145 u32
*header_digest
= (u32
*)&cmd
->pdu
[ISCSI_HDR_LEN
];
3147 iscsit_do_crypto_hash_buf(&conn
->conn_tx_hash
,
3148 (unsigned char *)hdr
, ISCSI_HDR_LEN
,
3149 0, NULL
, (u8
*)header_digest
);
3151 cmd
->iov_misc
[0].iov_len
+= ISCSI_CRC_LEN
;
3152 tx_size
+= ISCSI_CRC_LEN
;
3153 pr_debug("Attaching CRC32 HeaderDigest for Task"
3154 " Mgmt Response PDU 0x%08x\n", *header_digest
);
3157 cmd
->iov_misc_count
= 1;
3158 cmd
->tx_size
= tx_size
;
3160 pr_debug("Built Task Management Response ITT: 0x%08x,"
3161 " StatSN: 0x%08x, Response: 0x%02x, CID: %hu\n",
3162 cmd
->init_task_tag
, cmd
->stat_sn
, hdr
->response
, conn
->cid
);
3167 static int iscsit_build_sendtargets_response(struct iscsi_cmd
*cmd
)
3169 char *payload
= NULL
;
3170 struct iscsi_conn
*conn
= cmd
->conn
;
3171 struct iscsi_portal_group
*tpg
;
3172 struct iscsi_tiqn
*tiqn
;
3173 struct iscsi_tpg_np
*tpg_np
;
3174 int buffer_len
, end_of_buf
= 0, len
= 0, payload_len
= 0;
3175 unsigned char buf
[256];
3177 buffer_len
= (conn
->conn_ops
->MaxRecvDataSegmentLength
> 32768) ?
3178 32768 : conn
->conn_ops
->MaxRecvDataSegmentLength
;
3180 memset(buf
, 0, 256);
3182 payload
= kzalloc(buffer_len
, GFP_KERNEL
);
3184 pr_err("Unable to allocate memory for sendtargets"
3189 spin_lock(&tiqn_lock
);
3190 list_for_each_entry(tiqn
, &g_tiqn_list
, tiqn_list
) {
3191 len
= sprintf(buf
, "TargetName=%s", tiqn
->tiqn
);
3194 if ((len
+ payload_len
) > buffer_len
) {
3195 spin_unlock(&tiqn
->tiqn_tpg_lock
);
3199 memcpy((void *)payload
+ payload_len
, buf
, len
);
3202 spin_lock(&tiqn
->tiqn_tpg_lock
);
3203 list_for_each_entry(tpg
, &tiqn
->tiqn_tpg_list
, tpg_list
) {
3205 spin_lock(&tpg
->tpg_state_lock
);
3206 if ((tpg
->tpg_state
== TPG_STATE_FREE
) ||
3207 (tpg
->tpg_state
== TPG_STATE_INACTIVE
)) {
3208 spin_unlock(&tpg
->tpg_state_lock
);
3211 spin_unlock(&tpg
->tpg_state_lock
);
3213 spin_lock(&tpg
->tpg_np_lock
);
3214 list_for_each_entry(tpg_np
, &tpg
->tpg_gnp_list
,
3216 len
= sprintf(buf
, "TargetAddress="
3218 (tpg_np
->tpg_np
->np_sockaddr
.ss_family
== AF_INET6
) ?
3219 "[" : "", tpg_np
->tpg_np
->np_ip
,
3220 (tpg_np
->tpg_np
->np_sockaddr
.ss_family
== AF_INET6
) ?
3221 "]" : "", tpg_np
->tpg_np
->np_port
,
3225 if ((len
+ payload_len
) > buffer_len
) {
3226 spin_unlock(&tpg
->tpg_np_lock
);
3227 spin_unlock(&tiqn
->tiqn_tpg_lock
);
3231 memcpy((void *)payload
+ payload_len
, buf
, len
);
3234 spin_unlock(&tpg
->tpg_np_lock
);
3236 spin_unlock(&tiqn
->tiqn_tpg_lock
);
3241 spin_unlock(&tiqn_lock
);
3243 cmd
->buf_ptr
= payload
;
3249 * FIXME: Add support for F_BIT and C_BIT when the length is longer than
3250 * MaxRecvDataSegmentLength.
3252 static int iscsit_send_text_rsp(
3253 struct iscsi_cmd
*cmd
,
3254 struct iscsi_conn
*conn
)
3256 struct iscsi_text_rsp
*hdr
;
3258 u32 padding
= 0, tx_size
= 0;
3259 int text_length
, iov_count
= 0;
3261 text_length
= iscsit_build_sendtargets_response(cmd
);
3262 if (text_length
< 0)
3265 padding
= ((-text_length
) & 3);
3267 memset(cmd
->buf_ptr
+ text_length
, 0, padding
);
3268 pr_debug("Attaching %u additional bytes for"
3269 " padding.\n", padding
);
3272 hdr
= (struct iscsi_text_rsp
*) cmd
->pdu
;
3273 memset(hdr
, 0, ISCSI_HDR_LEN
);
3274 hdr
->opcode
= ISCSI_OP_TEXT_RSP
;
3275 hdr
->flags
|= ISCSI_FLAG_CMD_FINAL
;
3276 hton24(hdr
->dlength
, text_length
);
3277 hdr
->itt
= cpu_to_be32(cmd
->init_task_tag
);
3278 hdr
->ttt
= cpu_to_be32(cmd
->targ_xfer_tag
);
3279 cmd
->stat_sn
= conn
->stat_sn
++;
3280 hdr
->statsn
= cpu_to_be32(cmd
->stat_sn
);
3282 iscsit_increment_maxcmdsn(cmd
, conn
->sess
);
3283 hdr
->exp_cmdsn
= cpu_to_be32(conn
->sess
->exp_cmd_sn
);
3284 hdr
->max_cmdsn
= cpu_to_be32(conn
->sess
->max_cmd_sn
);
3286 iov
= &cmd
->iov_misc
[0];
3288 iov
[iov_count
].iov_base
= cmd
->pdu
;
3289 iov
[iov_count
++].iov_len
= ISCSI_HDR_LEN
;
3290 iov
[iov_count
].iov_base
= cmd
->buf_ptr
;
3291 iov
[iov_count
++].iov_len
= text_length
+ padding
;
3293 tx_size
+= (ISCSI_HDR_LEN
+ text_length
+ padding
);
3295 if (conn
->conn_ops
->HeaderDigest
) {
3296 u32
*header_digest
= (u32
*)&cmd
->pdu
[ISCSI_HDR_LEN
];
3298 iscsit_do_crypto_hash_buf(&conn
->conn_tx_hash
,
3299 (unsigned char *)hdr
, ISCSI_HDR_LEN
,
3300 0, NULL
, (u8
*)header_digest
);
3302 iov
[0].iov_len
+= ISCSI_CRC_LEN
;
3303 tx_size
+= ISCSI_CRC_LEN
;
3304 pr_debug("Attaching CRC32 HeaderDigest for"
3305 " Text Response PDU 0x%08x\n", *header_digest
);
3308 if (conn
->conn_ops
->DataDigest
) {
3309 iscsit_do_crypto_hash_buf(&conn
->conn_tx_hash
,
3310 cmd
->buf_ptr
, (text_length
+ padding
),
3311 0, NULL
, (u8
*)&cmd
->data_crc
);
3313 iov
[iov_count
].iov_base
= &cmd
->data_crc
;
3314 iov
[iov_count
++].iov_len
= ISCSI_CRC_LEN
;
3315 tx_size
+= ISCSI_CRC_LEN
;
3317 pr_debug("Attaching DataDigest for %u bytes of text"
3318 " data, CRC 0x%08x\n", (text_length
+ padding
),
3322 cmd
->iov_misc_count
= iov_count
;
3323 cmd
->tx_size
= tx_size
;
3325 pr_debug("Built Text Response: ITT: 0x%08x, StatSN: 0x%08x,"
3326 " Length: %u, CID: %hu\n", cmd
->init_task_tag
, cmd
->stat_sn
,
3327 text_length
, conn
->cid
);
3331 static int iscsit_send_reject(
3332 struct iscsi_cmd
*cmd
,
3333 struct iscsi_conn
*conn
)
3335 u32 iov_count
= 0, tx_size
= 0;
3336 struct iscsi_reject
*hdr
;
3339 hdr
= (struct iscsi_reject
*) cmd
->pdu
;
3340 hdr
->opcode
= ISCSI_OP_REJECT
;
3341 hdr
->flags
|= ISCSI_FLAG_CMD_FINAL
;
3342 hton24(hdr
->dlength
, ISCSI_HDR_LEN
);
3343 cmd
->stat_sn
= conn
->stat_sn
++;
3344 hdr
->statsn
= cpu_to_be32(cmd
->stat_sn
);
3345 hdr
->exp_cmdsn
= cpu_to_be32(conn
->sess
->exp_cmd_sn
);
3346 hdr
->max_cmdsn
= cpu_to_be32(conn
->sess
->max_cmd_sn
);
3348 iov
= &cmd
->iov_misc
[0];
3350 iov
[iov_count
].iov_base
= cmd
->pdu
;
3351 iov
[iov_count
++].iov_len
= ISCSI_HDR_LEN
;
3352 iov
[iov_count
].iov_base
= cmd
->buf_ptr
;
3353 iov
[iov_count
++].iov_len
= ISCSI_HDR_LEN
;
3355 tx_size
= (ISCSI_HDR_LEN
+ ISCSI_HDR_LEN
);
3357 if (conn
->conn_ops
->HeaderDigest
) {
3358 u32
*header_digest
= (u32
*)&cmd
->pdu
[ISCSI_HDR_LEN
];
3360 iscsit_do_crypto_hash_buf(&conn
->conn_tx_hash
,
3361 (unsigned char *)hdr
, ISCSI_HDR_LEN
,
3362 0, NULL
, (u8
*)header_digest
);
3364 iov
[0].iov_len
+= ISCSI_CRC_LEN
;
3365 tx_size
+= ISCSI_CRC_LEN
;
3366 pr_debug("Attaching CRC32 HeaderDigest for"
3367 " REJECT PDU 0x%08x\n", *header_digest
);
3370 if (conn
->conn_ops
->DataDigest
) {
3371 iscsit_do_crypto_hash_buf(&conn
->conn_tx_hash
,
3372 (unsigned char *)cmd
->buf_ptr
, ISCSI_HDR_LEN
,
3373 0, NULL
, (u8
*)&cmd
->data_crc
);
3375 iov
[iov_count
].iov_base
= &cmd
->data_crc
;
3376 iov
[iov_count
++].iov_len
= ISCSI_CRC_LEN
;
3377 tx_size
+= ISCSI_CRC_LEN
;
3378 pr_debug("Attaching CRC32 DataDigest for REJECT"
3379 " PDU 0x%08x\n", cmd
->data_crc
);
3382 cmd
->iov_misc_count
= iov_count
;
3383 cmd
->tx_size
= tx_size
;
3385 pr_debug("Built Reject PDU StatSN: 0x%08x, Reason: 0x%02x,"
3386 " CID: %hu\n", ntohl(hdr
->statsn
), hdr
->reason
, conn
->cid
);
3391 static void iscsit_tx_thread_wait_for_tcp(struct iscsi_conn
*conn
)
3393 if ((conn
->sock
->sk
->sk_shutdown
& SEND_SHUTDOWN
) ||
3394 (conn
->sock
->sk
->sk_shutdown
& RCV_SHUTDOWN
)) {
3395 wait_for_completion_interruptible_timeout(
3396 &conn
->tx_half_close_comp
,
3397 ISCSI_TX_THREAD_TCP_TIMEOUT
* HZ
);
3403 void iscsit_thread_get_cpumask(struct iscsi_conn
*conn
)
3405 struct iscsi_thread_set
*ts
= conn
->thread_set
;
3408 * thread_id is assigned from iscsit_global->ts_bitmap from
3409 * within iscsi_thread_set.c:iscsi_allocate_thread_sets()
3411 * Here we use thread_id to determine which CPU that this
3412 * iSCSI connection's iscsi_thread_set will be scheduled to
3415 ord
= ts
->thread_id
% cpumask_weight(cpu_online_mask
);
3417 pr_debug(">>>>>>>>>>>>>>>>>>>> Generated ord: %d from"
3418 " thread_id: %d\n", ord
, ts
->thread_id
);
3420 for_each_online_cpu(cpu
) {
3422 cpumask_set_cpu(cpu
, conn
->conn_cpumask
);
3427 * This should never be reached..
3430 cpumask_setall(conn
->conn_cpumask
);
3433 static inline void iscsit_thread_check_cpumask(
3434 struct iscsi_conn
*conn
,
3435 struct task_struct
*p
,
3440 * mode == 1 signals iscsi_target_tx_thread() usage.
3441 * mode == 0 signals iscsi_target_rx_thread() usage.
3444 if (!conn
->conn_tx_reset_cpumask
)
3446 conn
->conn_tx_reset_cpumask
= 0;
3448 if (!conn
->conn_rx_reset_cpumask
)
3450 conn
->conn_rx_reset_cpumask
= 0;
3453 * Update the CPU mask for this single kthread so that
3454 * both TX and RX kthreads are scheduled to run on the
3457 memset(buf
, 0, 128);
3458 cpumask_scnprintf(buf
, 128, conn
->conn_cpumask
);
3460 pr_debug(">>>>>>>>>>>>>> Calling set_cpus_allowed_ptr():"
3461 " %s for %s\n", buf
, p
->comm
);
3463 set_cpus_allowed_ptr(p
, conn
->conn_cpumask
);
3468 void iscsit_thread_get_cpumask(struct iscsi_conn
*conn
)
3473 #define iscsit_thread_check_cpumask(X, Y, Z) ({})
3474 #endif /* CONFIG_SMP */
3476 int iscsi_target_tx_thread(void *arg
)
3481 int sent_status
= 0;
3484 struct iscsi_cmd
*cmd
= NULL
;
3485 struct iscsi_conn
*conn
;
3486 struct iscsi_queue_req
*qr
= NULL
;
3487 struct se_cmd
*se_cmd
;
3488 struct iscsi_thread_set
*ts
= (struct iscsi_thread_set
*)arg
;
3490 * Allow ourselves to be interrupted by SIGINT so that a
3491 * connection recovery / failure event can be triggered externally.
3493 allow_signal(SIGINT
);
3496 conn
= iscsi_tx_thread_pre_handler(ts
);
3500 eodr
= map_sg
= ret
= sent_status
= use_misc
= 0;
3502 while (!kthread_should_stop()) {
3504 * Ensure that both TX and RX per connection kthreads
3505 * are scheduled to run on the same CPU.
3507 iscsit_thread_check_cpumask(conn
, current
, 1);
3509 schedule_timeout_interruptible(MAX_SCHEDULE_TIMEOUT
);
3511 if ((ts
->status
== ISCSI_THREAD_SET_RESET
) ||
3512 signal_pending(current
))
3516 qr
= iscsit_get_cmd_from_immediate_queue(conn
);
3518 atomic_set(&conn
->check_immediate_queue
, 0);
3521 kmem_cache_free(lio_qr_cache
, qr
);
3523 spin_lock_bh(&cmd
->istate_lock
);
3525 case ISTATE_SEND_R2T
:
3526 spin_unlock_bh(&cmd
->istate_lock
);
3527 ret
= iscsit_send_r2t(cmd
, conn
);
3530 spin_unlock_bh(&cmd
->istate_lock
);
3532 if (cmd
->data_direction
== DMA_TO_DEVICE
)
3533 iscsit_stop_dataout_timer(cmd
);
3535 spin_lock_bh(&conn
->cmd_lock
);
3536 list_del(&cmd
->i_list
);
3537 spin_unlock_bh(&conn
->cmd_lock
);
3539 iscsit_free_cmd(cmd
);
3541 case ISTATE_SEND_NOPIN_WANT_RESPONSE
:
3542 spin_unlock_bh(&cmd
->istate_lock
);
3543 iscsit_mod_nopin_response_timer(conn
);
3544 ret
= iscsit_send_unsolicited_nopin(cmd
,
3547 case ISTATE_SEND_NOPIN_NO_RESPONSE
:
3548 spin_unlock_bh(&cmd
->istate_lock
);
3549 ret
= iscsit_send_unsolicited_nopin(cmd
,
3553 pr_err("Unknown Opcode: 0x%02x ITT:"
3554 " 0x%08x, i_state: %d on CID: %hu\n",
3555 cmd
->iscsi_opcode
, cmd
->init_task_tag
, state
,
3557 spin_unlock_bh(&cmd
->istate_lock
);
3561 conn
->tx_immediate_queue
= 0;
3565 if (iscsit_send_tx_data(cmd
, conn
, 1) < 0) {
3566 conn
->tx_immediate_queue
= 0;
3567 iscsit_tx_thread_wait_for_tcp(conn
);
3571 spin_lock_bh(&cmd
->istate_lock
);
3573 case ISTATE_SEND_R2T
:
3574 spin_unlock_bh(&cmd
->istate_lock
);
3575 spin_lock_bh(&cmd
->dataout_timeout_lock
);
3576 iscsit_start_dataout_timer(cmd
, conn
);
3577 spin_unlock_bh(&cmd
->dataout_timeout_lock
);
3579 case ISTATE_SEND_NOPIN_WANT_RESPONSE
:
3580 cmd
->i_state
= ISTATE_SENT_NOPIN_WANT_RESPONSE
;
3581 spin_unlock_bh(&cmd
->istate_lock
);
3583 case ISTATE_SEND_NOPIN_NO_RESPONSE
:
3584 cmd
->i_state
= ISTATE_SENT_STATUS
;
3585 spin_unlock_bh(&cmd
->istate_lock
);
3588 pr_err("Unknown Opcode: 0x%02x ITT:"
3589 " 0x%08x, i_state: %d on CID: %hu\n",
3590 cmd
->iscsi_opcode
, cmd
->init_task_tag
,
3592 spin_unlock_bh(&cmd
->istate_lock
);
3597 conn
->tx_immediate_queue
= 0;
3600 qr
= iscsit_get_cmd_from_response_queue(conn
);
3604 kmem_cache_free(lio_qr_cache
, qr
);
3606 spin_lock_bh(&cmd
->istate_lock
);
3609 case ISTATE_SEND_DATAIN
:
3610 spin_unlock_bh(&cmd
->istate_lock
);
3611 ret
= iscsit_send_data_in(cmd
, conn
,
3615 case ISTATE_SEND_STATUS
:
3616 case ISTATE_SEND_STATUS_RECOVERY
:
3617 spin_unlock_bh(&cmd
->istate_lock
);
3619 ret
= iscsit_send_status(cmd
, conn
);
3621 case ISTATE_SEND_LOGOUTRSP
:
3622 spin_unlock_bh(&cmd
->istate_lock
);
3624 ret
= iscsit_send_logout_response(cmd
, conn
);
3626 case ISTATE_SEND_ASYNCMSG
:
3627 spin_unlock_bh(&cmd
->istate_lock
);
3629 ret
= iscsit_send_conn_drop_async_message(
3632 case ISTATE_SEND_NOPIN
:
3633 spin_unlock_bh(&cmd
->istate_lock
);
3635 ret
= iscsit_send_nopin_response(cmd
, conn
);
3637 case ISTATE_SEND_REJECT
:
3638 spin_unlock_bh(&cmd
->istate_lock
);
3640 ret
= iscsit_send_reject(cmd
, conn
);
3642 case ISTATE_SEND_TASKMGTRSP
:
3643 spin_unlock_bh(&cmd
->istate_lock
);
3645 ret
= iscsit_send_task_mgt_rsp(cmd
, conn
);
3648 ret
= iscsit_tmr_post_handler(cmd
, conn
);
3650 iscsit_fall_back_to_erl0(conn
->sess
);
3652 case ISTATE_SEND_TEXTRSP
:
3653 spin_unlock_bh(&cmd
->istate_lock
);
3655 ret
= iscsit_send_text_rsp(cmd
, conn
);
3658 pr_err("Unknown Opcode: 0x%02x ITT:"
3659 " 0x%08x, i_state: %d on CID: %hu\n",
3660 cmd
->iscsi_opcode
, cmd
->init_task_tag
,
3662 spin_unlock_bh(&cmd
->istate_lock
);
3666 conn
->tx_response_queue
= 0;
3670 se_cmd
= &cmd
->se_cmd
;
3672 if (map_sg
&& !conn
->conn_ops
->IFMarker
) {
3673 if (iscsit_fe_sendpage_sg(cmd
, conn
) < 0) {
3674 conn
->tx_response_queue
= 0;
3675 iscsit_tx_thread_wait_for_tcp(conn
);
3676 iscsit_unmap_iovec(cmd
);
3680 if (iscsit_send_tx_data(cmd
, conn
, use_misc
) < 0) {
3681 conn
->tx_response_queue
= 0;
3682 iscsit_tx_thread_wait_for_tcp(conn
);
3683 iscsit_unmap_iovec(cmd
);
3688 iscsit_unmap_iovec(cmd
);
3690 spin_lock_bh(&cmd
->istate_lock
);
3692 case ISTATE_SEND_DATAIN
:
3694 goto check_rsp_state
;
3697 cmd
->i_state
= ISTATE_SENT_LAST_DATAIN
;
3699 eodr
= use_misc
= 0;
3700 } else if (eodr
== 2) {
3701 cmd
->i_state
= state
=
3704 eodr
= use_misc
= 0;
3705 goto check_rsp_state
;
3708 case ISTATE_SEND_STATUS
:
3712 case ISTATE_SEND_ASYNCMSG
:
3713 case ISTATE_SEND_NOPIN
:
3714 case ISTATE_SEND_STATUS_RECOVERY
:
3715 case ISTATE_SEND_TEXTRSP
:
3719 case ISTATE_SEND_REJECT
:
3721 if (cmd
->cmd_flags
& ICF_REJECT_FAIL_CONN
) {
3722 cmd
->cmd_flags
&= ~ICF_REJECT_FAIL_CONN
;
3723 spin_unlock_bh(&cmd
->istate_lock
);
3724 complete(&cmd
->reject_comp
);
3727 complete(&cmd
->reject_comp
);
3729 case ISTATE_SEND_TASKMGTRSP
:
3733 case ISTATE_SEND_LOGOUTRSP
:
3734 spin_unlock_bh(&cmd
->istate_lock
);
3735 if (!iscsit_logout_post_handler(cmd
, conn
))
3737 spin_lock_bh(&cmd
->istate_lock
);
3742 pr_err("Unknown Opcode: 0x%02x ITT:"
3743 " 0x%08x, i_state: %d on CID: %hu\n",
3744 cmd
->iscsi_opcode
, cmd
->init_task_tag
,
3745 cmd
->i_state
, conn
->cid
);
3746 spin_unlock_bh(&cmd
->istate_lock
);
3751 cmd
->i_state
= ISTATE_SENT_STATUS
;
3754 spin_unlock_bh(&cmd
->istate_lock
);
3756 if (atomic_read(&conn
->check_immediate_queue
))
3761 conn
->tx_response_queue
= 0;
3765 iscsit_take_action_for_connection_exit(conn
);
3771 int iscsi_target_rx_thread(void *arg
)
3774 u8 buffer
[ISCSI_HDR_LEN
], opcode
;
3775 u32 checksum
= 0, digest
= 0;
3776 struct iscsi_conn
*conn
= NULL
;
3777 struct iscsi_thread_set
*ts
= (struct iscsi_thread_set
*)arg
;
3780 * Allow ourselves to be interrupted by SIGINT so that a
3781 * connection recovery / failure event can be triggered externally.
3783 allow_signal(SIGINT
);
3786 conn
= iscsi_rx_thread_pre_handler(ts
);
3790 while (!kthread_should_stop()) {
3792 * Ensure that both TX and RX per connection kthreads
3793 * are scheduled to run on the same CPU.
3795 iscsit_thread_check_cpumask(conn
, current
, 0);
3797 memset(buffer
, 0, ISCSI_HDR_LEN
);
3798 memset(&iov
, 0, sizeof(struct kvec
));
3800 iov
.iov_base
= buffer
;
3801 iov
.iov_len
= ISCSI_HDR_LEN
;
3803 ret
= rx_data(conn
, &iov
, 1, ISCSI_HDR_LEN
);
3804 if (ret
!= ISCSI_HDR_LEN
) {
3805 iscsit_rx_thread_wait_for_tcp(conn
);
3810 * Set conn->bad_hdr for use with REJECT PDUs.
3812 memcpy(&conn
->bad_hdr
, &buffer
, ISCSI_HDR_LEN
);
3814 if (conn
->conn_ops
->HeaderDigest
) {
3815 iov
.iov_base
= &digest
;
3816 iov
.iov_len
= ISCSI_CRC_LEN
;
3818 ret
= rx_data(conn
, &iov
, 1, ISCSI_CRC_LEN
);
3819 if (ret
!= ISCSI_CRC_LEN
) {
3820 iscsit_rx_thread_wait_for_tcp(conn
);
3824 iscsit_do_crypto_hash_buf(&conn
->conn_rx_hash
,
3825 buffer
, ISCSI_HDR_LEN
,
3826 0, NULL
, (u8
*)&checksum
);
3828 if (digest
!= checksum
) {
3829 pr_err("HeaderDigest CRC32C failed,"
3830 " received 0x%08x, computed 0x%08x\n",
3833 * Set the PDU to 0xff so it will intentionally
3834 * hit default in the switch below.
3836 memset(buffer
, 0xff, ISCSI_HDR_LEN
);
3837 spin_lock_bh(&conn
->sess
->session_stats_lock
);
3838 conn
->sess
->conn_digest_errors
++;
3839 spin_unlock_bh(&conn
->sess
->session_stats_lock
);
3841 pr_debug("Got HeaderDigest CRC32C"
3842 " 0x%08x\n", checksum
);
3846 if (conn
->conn_state
== TARG_CONN_STATE_IN_LOGOUT
)
3849 opcode
= buffer
[0] & ISCSI_OPCODE_MASK
;
3851 if (conn
->sess
->sess_ops
->SessionType
&&
3852 ((!(opcode
& ISCSI_OP_TEXT
)) ||
3853 (!(opcode
& ISCSI_OP_LOGOUT
)))) {
3854 pr_err("Received illegal iSCSI Opcode: 0x%02x"
3855 " while in Discovery Session, rejecting.\n", opcode
);
3856 iscsit_add_reject(ISCSI_REASON_PROTOCOL_ERROR
, 1,
3862 case ISCSI_OP_SCSI_CMD
:
3863 if (iscsit_handle_scsi_cmd(conn
, buffer
) < 0)
3866 case ISCSI_OP_SCSI_DATA_OUT
:
3867 if (iscsit_handle_data_out(conn
, buffer
) < 0)
3870 case ISCSI_OP_NOOP_OUT
:
3871 if (iscsit_handle_nop_out(conn
, buffer
) < 0)
3874 case ISCSI_OP_SCSI_TMFUNC
:
3875 if (iscsit_handle_task_mgt_cmd(conn
, buffer
) < 0)
3879 if (iscsit_handle_text_cmd(conn
, buffer
) < 0)
3882 case ISCSI_OP_LOGOUT
:
3883 ret
= iscsit_handle_logout_cmd(conn
, buffer
);
3885 wait_for_completion_timeout(&conn
->conn_logout_comp
,
3886 SECONDS_FOR_LOGOUT_COMP
* HZ
);
3891 case ISCSI_OP_SNACK
:
3892 if (iscsit_handle_snack(conn
, buffer
) < 0)
3896 pr_err("Got unknown iSCSI OpCode: 0x%02x\n",
3898 if (!conn
->sess
->sess_ops
->ErrorRecoveryLevel
) {
3899 pr_err("Cannot recover from unknown"
3900 " opcode while ERL=0, closing iSCSI connection"
3904 if (!conn
->conn_ops
->OFMarker
) {
3905 pr_err("Unable to recover from unknown"
3906 " opcode while OFMarker=No, closing iSCSI"
3910 if (iscsit_recover_from_unknown_opcode(conn
) < 0) {
3911 pr_err("Unable to recover from unknown"
3912 " opcode, closing iSCSI connection.\n");
3920 if (!signal_pending(current
))
3921 atomic_set(&conn
->transport_failed
, 1);
3922 iscsit_take_action_for_connection_exit(conn
);
3928 static void iscsit_release_commands_from_conn(struct iscsi_conn
*conn
)
3930 struct iscsi_cmd
*cmd
= NULL
, *cmd_tmp
= NULL
;
3931 struct iscsi_session
*sess
= conn
->sess
;
3933 * We expect this function to only ever be called from either RX or TX
3934 * thread context via iscsit_close_connection() once the other context
3935 * has been reset -> returned sleeping pre-handler state.
3937 spin_lock_bh(&conn
->cmd_lock
);
3938 list_for_each_entry_safe(cmd
, cmd_tmp
, &conn
->conn_cmd_list
, i_list
) {
3940 list_del(&cmd
->i_list
);
3941 spin_unlock_bh(&conn
->cmd_lock
);
3943 iscsit_increment_maxcmdsn(cmd
, sess
);
3945 iscsit_free_cmd(cmd
);
3947 spin_lock_bh(&conn
->cmd_lock
);
3949 spin_unlock_bh(&conn
->cmd_lock
);
3952 static void iscsit_stop_timers_for_cmds(
3953 struct iscsi_conn
*conn
)
3955 struct iscsi_cmd
*cmd
;
3957 spin_lock_bh(&conn
->cmd_lock
);
3958 list_for_each_entry(cmd
, &conn
->conn_cmd_list
, i_list
) {
3959 if (cmd
->data_direction
== DMA_TO_DEVICE
)
3960 iscsit_stop_dataout_timer(cmd
);
3962 spin_unlock_bh(&conn
->cmd_lock
);
3965 int iscsit_close_connection(
3966 struct iscsi_conn
*conn
)
3968 int conn_logout
= (conn
->conn_state
== TARG_CONN_STATE_IN_LOGOUT
);
3969 struct iscsi_session
*sess
= conn
->sess
;
3971 pr_debug("Closing iSCSI connection CID %hu on SID:"
3972 " %u\n", conn
->cid
, sess
->sid
);
3974 * Always up conn_logout_comp just in case the RX Thread is sleeping
3975 * and the logout response never got sent because the connection
3978 complete(&conn
->conn_logout_comp
);
3980 iscsi_release_thread_set(conn
);
3982 iscsit_stop_timers_for_cmds(conn
);
3983 iscsit_stop_nopin_response_timer(conn
);
3984 iscsit_stop_nopin_timer(conn
);
3985 iscsit_free_queue_reqs_for_conn(conn
);
3988 * During Connection recovery drop unacknowledged out of order
3989 * commands for this connection, and prepare the other commands
3992 * During normal operation clear the out of order commands (but
3993 * do not free the struct iscsi_ooo_cmdsn's) and release all
3994 * struct iscsi_cmds.
3996 if (atomic_read(&conn
->connection_recovery
)) {
3997 iscsit_discard_unacknowledged_ooo_cmdsns_for_conn(conn
);
3998 iscsit_prepare_cmds_for_realligance(conn
);
4000 iscsit_clear_ooo_cmdsns_for_conn(conn
);
4001 iscsit_release_commands_from_conn(conn
);
4005 * Handle decrementing session or connection usage count if
4006 * a logout response was not able to be sent because the
4007 * connection failed. Fall back to Session Recovery here.
4009 if (atomic_read(&conn
->conn_logout_remove
)) {
4010 if (conn
->conn_logout_reason
== ISCSI_LOGOUT_REASON_CLOSE_SESSION
) {
4011 iscsit_dec_conn_usage_count(conn
);
4012 iscsit_dec_session_usage_count(sess
);
4014 if (conn
->conn_logout_reason
== ISCSI_LOGOUT_REASON_CLOSE_CONNECTION
)
4015 iscsit_dec_conn_usage_count(conn
);
4017 atomic_set(&conn
->conn_logout_remove
, 0);
4018 atomic_set(&sess
->session_reinstatement
, 0);
4019 atomic_set(&sess
->session_fall_back_to_erl0
, 1);
4022 spin_lock_bh(&sess
->conn_lock
);
4023 list_del(&conn
->conn_list
);
4026 * Attempt to let the Initiator know this connection failed by
4027 * sending an Connection Dropped Async Message on another
4028 * active connection.
4030 if (atomic_read(&conn
->connection_recovery
))
4031 iscsit_build_conn_drop_async_message(conn
);
4033 spin_unlock_bh(&sess
->conn_lock
);
4036 * If connection reinstatement is being performed on this connection,
4037 * up the connection reinstatement semaphore that is being blocked on
4038 * in iscsit_cause_connection_reinstatement().
4040 spin_lock_bh(&conn
->state_lock
);
4041 if (atomic_read(&conn
->sleep_on_conn_wait_comp
)) {
4042 spin_unlock_bh(&conn
->state_lock
);
4043 complete(&conn
->conn_wait_comp
);
4044 wait_for_completion(&conn
->conn_post_wait_comp
);
4045 spin_lock_bh(&conn
->state_lock
);
4049 * If connection reinstatement is being performed on this connection
4050 * by receiving a REMOVECONNFORRECOVERY logout request, up the
4051 * connection wait rcfr semaphore that is being blocked on
4052 * an iscsit_connection_reinstatement_rcfr().
4054 if (atomic_read(&conn
->connection_wait_rcfr
)) {
4055 spin_unlock_bh(&conn
->state_lock
);
4056 complete(&conn
->conn_wait_rcfr_comp
);
4057 wait_for_completion(&conn
->conn_post_wait_comp
);
4058 spin_lock_bh(&conn
->state_lock
);
4060 atomic_set(&conn
->connection_reinstatement
, 1);
4061 spin_unlock_bh(&conn
->state_lock
);
4064 * If any other processes are accessing this connection pointer we
4065 * must wait until they have completed.
4067 iscsit_check_conn_usage_count(conn
);
4069 if (conn
->conn_rx_hash
.tfm
)
4070 crypto_free_hash(conn
->conn_rx_hash
.tfm
);
4071 if (conn
->conn_tx_hash
.tfm
)
4072 crypto_free_hash(conn
->conn_tx_hash
.tfm
);
4074 if (conn
->conn_cpumask
)
4075 free_cpumask_var(conn
->conn_cpumask
);
4077 kfree(conn
->conn_ops
);
4078 conn
->conn_ops
= NULL
;
4081 if (conn
->conn_flags
& CONNFLAG_SCTP_STRUCT_FILE
) {
4082 kfree(conn
->sock
->file
);
4083 conn
->sock
->file
= NULL
;
4085 sock_release(conn
->sock
);
4087 conn
->thread_set
= NULL
;
4089 pr_debug("Moving to TARG_CONN_STATE_FREE.\n");
4090 conn
->conn_state
= TARG_CONN_STATE_FREE
;
4093 spin_lock_bh(&sess
->conn_lock
);
4094 atomic_dec(&sess
->nconn
);
4095 pr_debug("Decremented iSCSI connection count to %hu from node:"
4096 " %s\n", atomic_read(&sess
->nconn
),
4097 sess
->sess_ops
->InitiatorName
);
4099 * Make sure that if one connection fails in an non ERL=2 iSCSI
4100 * Session that they all fail.
4102 if ((sess
->sess_ops
->ErrorRecoveryLevel
!= 2) && !conn_logout
&&
4103 !atomic_read(&sess
->session_logout
))
4104 atomic_set(&sess
->session_fall_back_to_erl0
, 1);
4107 * If this was not the last connection in the session, and we are
4108 * performing session reinstatement or falling back to ERL=0, call
4109 * iscsit_stop_session() without sleeping to shutdown the other
4110 * active connections.
4112 if (atomic_read(&sess
->nconn
)) {
4113 if (!atomic_read(&sess
->session_reinstatement
) &&
4114 !atomic_read(&sess
->session_fall_back_to_erl0
)) {
4115 spin_unlock_bh(&sess
->conn_lock
);
4118 if (!atomic_read(&sess
->session_stop_active
)) {
4119 atomic_set(&sess
->session_stop_active
, 1);
4120 spin_unlock_bh(&sess
->conn_lock
);
4121 iscsit_stop_session(sess
, 0, 0);
4124 spin_unlock_bh(&sess
->conn_lock
);
4129 * If this was the last connection in the session and one of the
4130 * following is occurring:
4132 * Session Reinstatement is not being performed, and are falling back
4133 * to ERL=0 call iscsit_close_session().
4135 * Session Logout was requested. iscsit_close_session() will be called
4138 * Session Continuation is not being performed, start the Time2Retain
4139 * handler and check if sleep_on_sess_wait_sem is active.
4141 if (!atomic_read(&sess
->session_reinstatement
) &&
4142 atomic_read(&sess
->session_fall_back_to_erl0
)) {
4143 spin_unlock_bh(&sess
->conn_lock
);
4144 iscsit_close_session(sess
);
4147 } else if (atomic_read(&sess
->session_logout
)) {
4148 pr_debug("Moving to TARG_SESS_STATE_FREE.\n");
4149 sess
->session_state
= TARG_SESS_STATE_FREE
;
4150 spin_unlock_bh(&sess
->conn_lock
);
4152 if (atomic_read(&sess
->sleep_on_sess_wait_comp
))
4153 complete(&sess
->session_wait_comp
);
4157 pr_debug("Moving to TARG_SESS_STATE_FAILED.\n");
4158 sess
->session_state
= TARG_SESS_STATE_FAILED
;
4160 if (!atomic_read(&sess
->session_continuation
)) {
4161 spin_unlock_bh(&sess
->conn_lock
);
4162 iscsit_start_time2retain_handler(sess
);
4164 spin_unlock_bh(&sess
->conn_lock
);
4166 if (atomic_read(&sess
->sleep_on_sess_wait_comp
))
4167 complete(&sess
->session_wait_comp
);
4171 spin_unlock_bh(&sess
->conn_lock
);
4176 int iscsit_close_session(struct iscsi_session
*sess
)
4178 struct iscsi_portal_group
*tpg
= ISCSI_TPG_S(sess
);
4179 struct se_portal_group
*se_tpg
= &tpg
->tpg_se_tpg
;
4181 if (atomic_read(&sess
->nconn
)) {
4182 pr_err("%d connection(s) still exist for iSCSI session"
4183 " to %s\n", atomic_read(&sess
->nconn
),
4184 sess
->sess_ops
->InitiatorName
);
4188 spin_lock_bh(&se_tpg
->session_lock
);
4189 atomic_set(&sess
->session_logout
, 1);
4190 atomic_set(&sess
->session_reinstatement
, 1);
4191 iscsit_stop_time2retain_timer(sess
);
4192 spin_unlock_bh(&se_tpg
->session_lock
);
4195 * transport_deregister_session_configfs() will clear the
4196 * struct se_node_acl->nacl_sess pointer now as a iscsi_np process context
4197 * can be setting it again with __transport_register_session() in
4198 * iscsi_post_login_handler() again after the iscsit_stop_session()
4199 * completes in iscsi_np context.
4201 transport_deregister_session_configfs(sess
->se_sess
);
4204 * If any other processes are accessing this session pointer we must
4205 * wait until they have completed. If we are in an interrupt (the
4206 * time2retain handler) and contain and active session usage count we
4207 * restart the timer and exit.
4209 if (!in_interrupt()) {
4210 if (iscsit_check_session_usage_count(sess
) == 1)
4211 iscsit_stop_session(sess
, 1, 1);
4213 if (iscsit_check_session_usage_count(sess
) == 2) {
4214 atomic_set(&sess
->session_logout
, 0);
4215 iscsit_start_time2retain_handler(sess
);
4220 transport_deregister_session(sess
->se_sess
);
4222 if (sess
->sess_ops
->ErrorRecoveryLevel
== 2)
4223 iscsit_free_connection_recovery_entires(sess
);
4225 iscsit_free_all_ooo_cmdsns(sess
);
4227 spin_lock_bh(&se_tpg
->session_lock
);
4228 pr_debug("Moving to TARG_SESS_STATE_FREE.\n");
4229 sess
->session_state
= TARG_SESS_STATE_FREE
;
4230 pr_debug("Released iSCSI session from node: %s\n",
4231 sess
->sess_ops
->InitiatorName
);
4234 tpg
->tpg_tiqn
->tiqn_nsessions
--;
4236 pr_debug("Decremented number of active iSCSI Sessions on"
4237 " iSCSI TPG: %hu to %u\n", tpg
->tpgt
, tpg
->nsessions
);
4239 spin_lock(&sess_idr_lock
);
4240 idr_remove(&sess_idr
, sess
->session_index
);
4241 spin_unlock(&sess_idr_lock
);
4243 kfree(sess
->sess_ops
);
4244 sess
->sess_ops
= NULL
;
4245 spin_unlock_bh(&se_tpg
->session_lock
);
4251 static void iscsit_logout_post_handler_closesession(
4252 struct iscsi_conn
*conn
)
4254 struct iscsi_session
*sess
= conn
->sess
;
4256 iscsi_set_thread_clear(conn
, ISCSI_CLEAR_TX_THREAD
);
4257 iscsi_set_thread_set_signal(conn
, ISCSI_SIGNAL_TX_THREAD
);
4259 atomic_set(&conn
->conn_logout_remove
, 0);
4260 complete(&conn
->conn_logout_comp
);
4262 iscsit_dec_conn_usage_count(conn
);
4263 iscsit_stop_session(sess
, 1, 1);
4264 iscsit_dec_session_usage_count(sess
);
4265 iscsit_close_session(sess
);
4268 static void iscsit_logout_post_handler_samecid(
4269 struct iscsi_conn
*conn
)
4271 iscsi_set_thread_clear(conn
, ISCSI_CLEAR_TX_THREAD
);
4272 iscsi_set_thread_set_signal(conn
, ISCSI_SIGNAL_TX_THREAD
);
4274 atomic_set(&conn
->conn_logout_remove
, 0);
4275 complete(&conn
->conn_logout_comp
);
4277 iscsit_cause_connection_reinstatement(conn
, 1);
4278 iscsit_dec_conn_usage_count(conn
);
4281 static void iscsit_logout_post_handler_diffcid(
4282 struct iscsi_conn
*conn
,
4285 struct iscsi_conn
*l_conn
;
4286 struct iscsi_session
*sess
= conn
->sess
;
4291 spin_lock_bh(&sess
->conn_lock
);
4292 list_for_each_entry(l_conn
, &sess
->sess_conn_list
, conn_list
) {
4293 if (l_conn
->cid
== cid
) {
4294 iscsit_inc_conn_usage_count(l_conn
);
4298 spin_unlock_bh(&sess
->conn_lock
);
4304 l_conn
->sock
->ops
->shutdown(l_conn
->sock
, RCV_SHUTDOWN
);
4306 spin_lock_bh(&l_conn
->state_lock
);
4307 pr_debug("Moving to TARG_CONN_STATE_IN_LOGOUT.\n");
4308 l_conn
->conn_state
= TARG_CONN_STATE_IN_LOGOUT
;
4309 spin_unlock_bh(&l_conn
->state_lock
);
4311 iscsit_cause_connection_reinstatement(l_conn
, 1);
4312 iscsit_dec_conn_usage_count(l_conn
);
4316 * Return of 0 causes the TX thread to restart.
4318 static int iscsit_logout_post_handler(
4319 struct iscsi_cmd
*cmd
,
4320 struct iscsi_conn
*conn
)
4324 switch (cmd
->logout_reason
) {
4325 case ISCSI_LOGOUT_REASON_CLOSE_SESSION
:
4326 switch (cmd
->logout_response
) {
4327 case ISCSI_LOGOUT_SUCCESS
:
4328 case ISCSI_LOGOUT_CLEANUP_FAILED
:
4330 iscsit_logout_post_handler_closesession(conn
);
4335 case ISCSI_LOGOUT_REASON_CLOSE_CONNECTION
:
4336 if (conn
->cid
== cmd
->logout_cid
) {
4337 switch (cmd
->logout_response
) {
4338 case ISCSI_LOGOUT_SUCCESS
:
4339 case ISCSI_LOGOUT_CLEANUP_FAILED
:
4341 iscsit_logout_post_handler_samecid(conn
);
4346 switch (cmd
->logout_response
) {
4347 case ISCSI_LOGOUT_SUCCESS
:
4348 iscsit_logout_post_handler_diffcid(conn
,
4351 case ISCSI_LOGOUT_CID_NOT_FOUND
:
4352 case ISCSI_LOGOUT_CLEANUP_FAILED
:
4359 case ISCSI_LOGOUT_REASON_RECOVERY
:
4360 switch (cmd
->logout_response
) {
4361 case ISCSI_LOGOUT_SUCCESS
:
4362 case ISCSI_LOGOUT_CID_NOT_FOUND
:
4363 case ISCSI_LOGOUT_RECOVERY_UNSUPPORTED
:
4364 case ISCSI_LOGOUT_CLEANUP_FAILED
:
4377 void iscsit_fail_session(struct iscsi_session
*sess
)
4379 struct iscsi_conn
*conn
;
4381 spin_lock_bh(&sess
->conn_lock
);
4382 list_for_each_entry(conn
, &sess
->sess_conn_list
, conn_list
) {
4383 pr_debug("Moving to TARG_CONN_STATE_CLEANUP_WAIT.\n");
4384 conn
->conn_state
= TARG_CONN_STATE_CLEANUP_WAIT
;
4386 spin_unlock_bh(&sess
->conn_lock
);
4388 pr_debug("Moving to TARG_SESS_STATE_FAILED.\n");
4389 sess
->session_state
= TARG_SESS_STATE_FAILED
;
4392 int iscsit_free_session(struct iscsi_session
*sess
)
4394 u16 conn_count
= atomic_read(&sess
->nconn
);
4395 struct iscsi_conn
*conn
, *conn_tmp
= NULL
;
4398 spin_lock_bh(&sess
->conn_lock
);
4399 atomic_set(&sess
->sleep_on_sess_wait_comp
, 1);
4401 list_for_each_entry_safe(conn
, conn_tmp
, &sess
->sess_conn_list
,
4403 if (conn_count
== 0)
4406 if (list_is_last(&conn
->conn_list
, &sess
->sess_conn_list
)) {
4409 iscsit_inc_conn_usage_count(conn_tmp
);
4412 iscsit_inc_conn_usage_count(conn
);
4414 spin_unlock_bh(&sess
->conn_lock
);
4415 iscsit_cause_connection_reinstatement(conn
, 1);
4416 spin_lock_bh(&sess
->conn_lock
);
4418 iscsit_dec_conn_usage_count(conn
);
4420 iscsit_dec_conn_usage_count(conn_tmp
);
4425 if (atomic_read(&sess
->nconn
)) {
4426 spin_unlock_bh(&sess
->conn_lock
);
4427 wait_for_completion(&sess
->session_wait_comp
);
4429 spin_unlock_bh(&sess
->conn_lock
);
4431 iscsit_close_session(sess
);
4435 void iscsit_stop_session(
4436 struct iscsi_session
*sess
,
4438 int connection_sleep
)
4440 u16 conn_count
= atomic_read(&sess
->nconn
);
4441 struct iscsi_conn
*conn
, *conn_tmp
= NULL
;
4444 spin_lock_bh(&sess
->conn_lock
);
4446 atomic_set(&sess
->sleep_on_sess_wait_comp
, 1);
4448 if (connection_sleep
) {
4449 list_for_each_entry_safe(conn
, conn_tmp
, &sess
->sess_conn_list
,
4451 if (conn_count
== 0)
4454 if (list_is_last(&conn
->conn_list
, &sess
->sess_conn_list
)) {
4457 iscsit_inc_conn_usage_count(conn_tmp
);
4460 iscsit_inc_conn_usage_count(conn
);
4462 spin_unlock_bh(&sess
->conn_lock
);
4463 iscsit_cause_connection_reinstatement(conn
, 1);
4464 spin_lock_bh(&sess
->conn_lock
);
4466 iscsit_dec_conn_usage_count(conn
);
4468 iscsit_dec_conn_usage_count(conn_tmp
);
4472 list_for_each_entry(conn
, &sess
->sess_conn_list
, conn_list
)
4473 iscsit_cause_connection_reinstatement(conn
, 0);
4476 if (session_sleep
&& atomic_read(&sess
->nconn
)) {
4477 spin_unlock_bh(&sess
->conn_lock
);
4478 wait_for_completion(&sess
->session_wait_comp
);
4480 spin_unlock_bh(&sess
->conn_lock
);
4483 int iscsit_release_sessions_for_tpg(struct iscsi_portal_group
*tpg
, int force
)
4485 struct iscsi_session
*sess
;
4486 struct se_portal_group
*se_tpg
= &tpg
->tpg_se_tpg
;
4487 struct se_session
*se_sess
, *se_sess_tmp
;
4488 int session_count
= 0;
4490 spin_lock_bh(&se_tpg
->session_lock
);
4491 if (tpg
->nsessions
&& !force
) {
4492 spin_unlock_bh(&se_tpg
->session_lock
);
4496 list_for_each_entry_safe(se_sess
, se_sess_tmp
, &se_tpg
->tpg_sess_list
,
4498 sess
= (struct iscsi_session
*)se_sess
->fabric_sess_ptr
;
4500 spin_lock(&sess
->conn_lock
);
4501 if (atomic_read(&sess
->session_fall_back_to_erl0
) ||
4502 atomic_read(&sess
->session_logout
) ||
4503 (sess
->time2retain_timer_flags
& ISCSI_TF_EXPIRED
)) {
4504 spin_unlock(&sess
->conn_lock
);
4507 atomic_set(&sess
->session_reinstatement
, 1);
4508 spin_unlock(&sess
->conn_lock
);
4509 spin_unlock_bh(&se_tpg
->session_lock
);
4511 iscsit_free_session(sess
);
4512 spin_lock_bh(&se_tpg
->session_lock
);
4516 spin_unlock_bh(&se_tpg
->session_lock
);
4518 pr_debug("Released %d iSCSI Session(s) from Target Portal"
4519 " Group: %hu\n", session_count
, tpg
->tpgt
);
4523 MODULE_DESCRIPTION("iSCSI-Target Driver for mainline target infrastructure");
4524 MODULE_VERSION("4.1.x");
4525 MODULE_AUTHOR("nab@Linux-iSCSI.org");
4526 MODULE_LICENSE("GPL");
4528 module_init(iscsi_target_init_module
);
4529 module_exit(iscsi_target_cleanup_module
);