1 /*******************************************************************************
2 * This file contains main functions related to the iSCSI Target Core Driver.
4 * (c) Copyright 2007-2013 Datera, Inc.
6 * Author: Nicholas A. Bellinger <nab@linux-iscsi.org>
8 * This program is free software; you can redistribute it and/or modify
9 * it under the terms of the GNU General Public License as published by
10 * the Free Software Foundation; either version 2 of the License, or
11 * (at your option) any later version.
13 * This program is distributed in the hope that it will be useful,
14 * but WITHOUT ANY WARRANTY; without even the implied warranty of
15 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
16 * GNU General Public License for more details.
17 ******************************************************************************/
19 #include <linux/string.h>
20 #include <linux/kthread.h>
21 #include <linux/crypto.h>
22 #include <linux/completion.h>
23 #include <linux/module.h>
24 #include <linux/idr.h>
25 #include <asm/unaligned.h>
26 #include <scsi/scsi_device.h>
27 #include <scsi/iscsi_proto.h>
28 #include <scsi/scsi_tcq.h>
29 #include <target/target_core_base.h>
30 #include <target/target_core_fabric.h>
31 #include <target/target_core_configfs.h>
33 #include "iscsi_target_core.h"
34 #include "iscsi_target_parameters.h"
35 #include "iscsi_target_seq_pdu_list.h"
36 #include "iscsi_target_tq.h"
37 #include "iscsi_target_configfs.h"
38 #include "iscsi_target_datain_values.h"
39 #include "iscsi_target_erl0.h"
40 #include "iscsi_target_erl1.h"
41 #include "iscsi_target_erl2.h"
42 #include "iscsi_target_login.h"
43 #include "iscsi_target_tmr.h"
44 #include "iscsi_target_tpg.h"
45 #include "iscsi_target_util.h"
46 #include "iscsi_target.h"
47 #include "iscsi_target_device.h"
48 #include "iscsi_target_stat.h"
50 #include <target/iscsi/iscsi_transport.h>
52 static LIST_HEAD(g_tiqn_list
);
53 static LIST_HEAD(g_np_list
);
54 static DEFINE_SPINLOCK(tiqn_lock
);
55 static DEFINE_MUTEX(np_lock
);
57 static struct idr tiqn_idr
;
59 struct mutex auth_id_lock
;
60 spinlock_t sess_idr_lock
;
62 struct iscsit_global
*iscsit_global
;
64 struct kmem_cache
*lio_qr_cache
;
65 struct kmem_cache
*lio_dr_cache
;
66 struct kmem_cache
*lio_ooo_cache
;
67 struct kmem_cache
*lio_r2t_cache
;
69 static int iscsit_handle_immediate_data(struct iscsi_cmd
*,
70 struct iscsi_scsi_req
*, u32
);
72 struct iscsi_tiqn
*iscsit_get_tiqn_for_login(unsigned char *buf
)
74 struct iscsi_tiqn
*tiqn
= NULL
;
76 spin_lock(&tiqn_lock
);
77 list_for_each_entry(tiqn
, &g_tiqn_list
, tiqn_list
) {
78 if (!strcmp(tiqn
->tiqn
, buf
)) {
80 spin_lock(&tiqn
->tiqn_state_lock
);
81 if (tiqn
->tiqn_state
== TIQN_STATE_ACTIVE
) {
82 tiqn
->tiqn_access_count
++;
83 spin_unlock(&tiqn
->tiqn_state_lock
);
84 spin_unlock(&tiqn_lock
);
87 spin_unlock(&tiqn
->tiqn_state_lock
);
90 spin_unlock(&tiqn_lock
);
95 static int iscsit_set_tiqn_shutdown(struct iscsi_tiqn
*tiqn
)
97 spin_lock(&tiqn
->tiqn_state_lock
);
98 if (tiqn
->tiqn_state
== TIQN_STATE_ACTIVE
) {
99 tiqn
->tiqn_state
= TIQN_STATE_SHUTDOWN
;
100 spin_unlock(&tiqn
->tiqn_state_lock
);
103 spin_unlock(&tiqn
->tiqn_state_lock
);
108 void iscsit_put_tiqn_for_login(struct iscsi_tiqn
*tiqn
)
110 spin_lock(&tiqn
->tiqn_state_lock
);
111 tiqn
->tiqn_access_count
--;
112 spin_unlock(&tiqn
->tiqn_state_lock
);
116 * Note that IQN formatting is expected to be done in userspace, and
117 * no explict IQN format checks are done here.
119 struct iscsi_tiqn
*iscsit_add_tiqn(unsigned char *buf
)
121 struct iscsi_tiqn
*tiqn
= NULL
;
124 if (strlen(buf
) >= ISCSI_IQN_LEN
) {
125 pr_err("Target IQN exceeds %d bytes\n",
127 return ERR_PTR(-EINVAL
);
130 tiqn
= kzalloc(sizeof(struct iscsi_tiqn
), GFP_KERNEL
);
132 pr_err("Unable to allocate struct iscsi_tiqn\n");
133 return ERR_PTR(-ENOMEM
);
136 sprintf(tiqn
->tiqn
, "%s", buf
);
137 INIT_LIST_HEAD(&tiqn
->tiqn_list
);
138 INIT_LIST_HEAD(&tiqn
->tiqn_tpg_list
);
139 spin_lock_init(&tiqn
->tiqn_state_lock
);
140 spin_lock_init(&tiqn
->tiqn_tpg_lock
);
141 spin_lock_init(&tiqn
->sess_err_stats
.lock
);
142 spin_lock_init(&tiqn
->login_stats
.lock
);
143 spin_lock_init(&tiqn
->logout_stats
.lock
);
145 tiqn
->tiqn_state
= TIQN_STATE_ACTIVE
;
147 idr_preload(GFP_KERNEL
);
148 spin_lock(&tiqn_lock
);
150 ret
= idr_alloc(&tiqn_idr
, NULL
, 0, 0, GFP_NOWAIT
);
152 pr_err("idr_alloc() failed for tiqn->tiqn_index\n");
153 spin_unlock(&tiqn_lock
);
158 tiqn
->tiqn_index
= ret
;
159 list_add_tail(&tiqn
->tiqn_list
, &g_tiqn_list
);
161 spin_unlock(&tiqn_lock
);
164 pr_debug("CORE[0] - Added iSCSI Target IQN: %s\n", tiqn
->tiqn
);
170 static void iscsit_wait_for_tiqn(struct iscsi_tiqn
*tiqn
)
173 * Wait for accesses to said struct iscsi_tiqn to end.
175 spin_lock(&tiqn
->tiqn_state_lock
);
176 while (tiqn
->tiqn_access_count
!= 0) {
177 spin_unlock(&tiqn
->tiqn_state_lock
);
179 spin_lock(&tiqn
->tiqn_state_lock
);
181 spin_unlock(&tiqn
->tiqn_state_lock
);
184 void iscsit_del_tiqn(struct iscsi_tiqn
*tiqn
)
187 * iscsit_set_tiqn_shutdown sets tiqn->tiqn_state = TIQN_STATE_SHUTDOWN
188 * while holding tiqn->tiqn_state_lock. This means that all subsequent
189 * attempts to access this struct iscsi_tiqn will fail from both transport
190 * fabric and control code paths.
192 if (iscsit_set_tiqn_shutdown(tiqn
) < 0) {
193 pr_err("iscsit_set_tiqn_shutdown() failed\n");
197 iscsit_wait_for_tiqn(tiqn
);
199 spin_lock(&tiqn_lock
);
200 list_del(&tiqn
->tiqn_list
);
201 idr_remove(&tiqn_idr
, tiqn
->tiqn_index
);
202 spin_unlock(&tiqn_lock
);
204 pr_debug("CORE[0] - Deleted iSCSI Target IQN: %s\n",
209 int iscsit_access_np(struct iscsi_np
*np
, struct iscsi_portal_group
*tpg
)
213 * Determine if the network portal is accepting storage traffic.
215 spin_lock_bh(&np
->np_thread_lock
);
216 if (np
->np_thread_state
!= ISCSI_NP_THREAD_ACTIVE
) {
217 spin_unlock_bh(&np
->np_thread_lock
);
220 spin_unlock_bh(&np
->np_thread_lock
);
222 * Determine if the portal group is accepting storage traffic.
224 spin_lock_bh(&tpg
->tpg_state_lock
);
225 if (tpg
->tpg_state
!= TPG_STATE_ACTIVE
) {
226 spin_unlock_bh(&tpg
->tpg_state_lock
);
229 spin_unlock_bh(&tpg
->tpg_state_lock
);
232 * Here we serialize access across the TIQN+TPG Tuple.
234 ret
= down_interruptible(&tpg
->np_login_sem
);
235 if ((ret
!= 0) || signal_pending(current
))
238 spin_lock_bh(&tpg
->tpg_state_lock
);
239 if (tpg
->tpg_state
!= TPG_STATE_ACTIVE
) {
240 spin_unlock_bh(&tpg
->tpg_state_lock
);
241 up(&tpg
->np_login_sem
);
244 spin_unlock_bh(&tpg
->tpg_state_lock
);
249 void iscsit_login_kref_put(struct kref
*kref
)
251 struct iscsi_tpg_np
*tpg_np
= container_of(kref
,
252 struct iscsi_tpg_np
, tpg_np_kref
);
254 complete(&tpg_np
->tpg_np_comp
);
257 int iscsit_deaccess_np(struct iscsi_np
*np
, struct iscsi_portal_group
*tpg
,
258 struct iscsi_tpg_np
*tpg_np
)
260 struct iscsi_tiqn
*tiqn
= tpg
->tpg_tiqn
;
262 up(&tpg
->np_login_sem
);
265 kref_put(&tpg_np
->tpg_np_kref
, iscsit_login_kref_put
);
268 iscsit_put_tiqn_for_login(tiqn
);
273 bool iscsit_check_np_match(
274 struct __kernel_sockaddr_storage
*sockaddr
,
276 int network_transport
)
278 struct sockaddr_in
*sock_in
, *sock_in_e
;
279 struct sockaddr_in6
*sock_in6
, *sock_in6_e
;
280 bool ip_match
= false;
283 if (sockaddr
->ss_family
== AF_INET6
) {
284 sock_in6
= (struct sockaddr_in6
*)sockaddr
;
285 sock_in6_e
= (struct sockaddr_in6
*)&np
->np_sockaddr
;
287 if (!memcmp(&sock_in6
->sin6_addr
.in6_u
,
288 &sock_in6_e
->sin6_addr
.in6_u
,
289 sizeof(struct in6_addr
)))
292 port
= ntohs(sock_in6
->sin6_port
);
294 sock_in
= (struct sockaddr_in
*)sockaddr
;
295 sock_in_e
= (struct sockaddr_in
*)&np
->np_sockaddr
;
297 if (sock_in
->sin_addr
.s_addr
== sock_in_e
->sin_addr
.s_addr
)
300 port
= ntohs(sock_in
->sin_port
);
303 if (ip_match
&& (np
->np_port
== port
) &&
304 (np
->np_network_transport
== network_transport
))
311 * Called with mutex np_lock held
313 static struct iscsi_np
*iscsit_get_np(
314 struct __kernel_sockaddr_storage
*sockaddr
,
315 int network_transport
)
320 list_for_each_entry(np
, &g_np_list
, np_list
) {
321 spin_lock_bh(&np
->np_thread_lock
);
322 if (np
->np_thread_state
!= ISCSI_NP_THREAD_ACTIVE
) {
323 spin_unlock_bh(&np
->np_thread_lock
);
327 match
= iscsit_check_np_match(sockaddr
, np
, network_transport
);
330 * Increment the np_exports reference count now to
331 * prevent iscsit_del_np() below from being called
332 * while iscsi_tpg_add_network_portal() is called.
335 spin_unlock_bh(&np
->np_thread_lock
);
338 spin_unlock_bh(&np
->np_thread_lock
);
344 struct iscsi_np
*iscsit_add_np(
345 struct __kernel_sockaddr_storage
*sockaddr
,
347 int network_transport
)
349 struct sockaddr_in
*sock_in
;
350 struct sockaddr_in6
*sock_in6
;
354 mutex_lock(&np_lock
);
357 * Locate the existing struct iscsi_np if already active..
359 np
= iscsit_get_np(sockaddr
, network_transport
);
361 mutex_unlock(&np_lock
);
365 np
= kzalloc(sizeof(struct iscsi_np
), GFP_KERNEL
);
367 pr_err("Unable to allocate memory for struct iscsi_np\n");
368 mutex_unlock(&np_lock
);
369 return ERR_PTR(-ENOMEM
);
372 np
->np_flags
|= NPF_IP_NETWORK
;
373 if (sockaddr
->ss_family
== AF_INET6
) {
374 sock_in6
= (struct sockaddr_in6
*)sockaddr
;
375 snprintf(np
->np_ip
, IPV6_ADDRESS_SPACE
, "%s", ip_str
);
376 np
->np_port
= ntohs(sock_in6
->sin6_port
);
378 sock_in
= (struct sockaddr_in
*)sockaddr
;
379 sprintf(np
->np_ip
, "%s", ip_str
);
380 np
->np_port
= ntohs(sock_in
->sin_port
);
383 np
->np_network_transport
= network_transport
;
384 spin_lock_init(&np
->np_thread_lock
);
385 init_completion(&np
->np_restart_comp
);
386 INIT_LIST_HEAD(&np
->np_list
);
388 ret
= iscsi_target_setup_login_socket(np
, sockaddr
);
391 mutex_unlock(&np_lock
);
395 np
->np_thread
= kthread_run(iscsi_target_login_thread
, np
, "iscsi_np");
396 if (IS_ERR(np
->np_thread
)) {
397 pr_err("Unable to create kthread: iscsi_np\n");
398 ret
= PTR_ERR(np
->np_thread
);
400 mutex_unlock(&np_lock
);
404 * Increment the np_exports reference count now to prevent
405 * iscsit_del_np() below from being run while a new call to
406 * iscsi_tpg_add_network_portal() for a matching iscsi_np is
407 * active. We don't need to hold np->np_thread_lock at this
408 * point because iscsi_np has not been added to g_np_list yet.
411 np
->np_thread_state
= ISCSI_NP_THREAD_ACTIVE
;
413 list_add_tail(&np
->np_list
, &g_np_list
);
414 mutex_unlock(&np_lock
);
416 pr_debug("CORE[0] - Added Network Portal: %s:%hu on %s\n",
417 np
->np_ip
, np
->np_port
, np
->np_transport
->name
);
422 int iscsit_reset_np_thread(
424 struct iscsi_tpg_np
*tpg_np
,
425 struct iscsi_portal_group
*tpg
,
428 spin_lock_bh(&np
->np_thread_lock
);
429 if (np
->np_thread_state
== ISCSI_NP_THREAD_INACTIVE
) {
430 spin_unlock_bh(&np
->np_thread_lock
);
433 np
->np_thread_state
= ISCSI_NP_THREAD_RESET
;
436 spin_unlock_bh(&np
->np_thread_lock
);
437 send_sig(SIGINT
, np
->np_thread
, 1);
438 wait_for_completion(&np
->np_restart_comp
);
439 spin_lock_bh(&np
->np_thread_lock
);
441 spin_unlock_bh(&np
->np_thread_lock
);
443 if (tpg_np
&& shutdown
) {
444 kref_put(&tpg_np
->tpg_np_kref
, iscsit_login_kref_put
);
446 wait_for_completion(&tpg_np
->tpg_np_comp
);
452 static void iscsit_free_np(struct iscsi_np
*np
)
455 sock_release(np
->np_socket
);
458 int iscsit_del_np(struct iscsi_np
*np
)
460 spin_lock_bh(&np
->np_thread_lock
);
462 if (np
->np_exports
) {
464 spin_unlock_bh(&np
->np_thread_lock
);
467 np
->np_thread_state
= ISCSI_NP_THREAD_SHUTDOWN
;
468 spin_unlock_bh(&np
->np_thread_lock
);
472 * We need to send the signal to wakeup Linux/Net
473 * which may be sleeping in sock_accept()..
475 send_sig(SIGINT
, np
->np_thread
, 1);
476 kthread_stop(np
->np_thread
);
477 np
->np_thread
= NULL
;
480 np
->np_transport
->iscsit_free_np(np
);
482 mutex_lock(&np_lock
);
483 list_del(&np
->np_list
);
484 mutex_unlock(&np_lock
);
486 pr_debug("CORE[0] - Removed Network Portal: %s:%hu on %s\n",
487 np
->np_ip
, np
->np_port
, np
->np_transport
->name
);
489 iscsit_put_transport(np
->np_transport
);
494 static int iscsit_immediate_queue(struct iscsi_conn
*, struct iscsi_cmd
*, int);
495 static int iscsit_response_queue(struct iscsi_conn
*, struct iscsi_cmd
*, int);
497 static int iscsit_queue_rsp(struct iscsi_conn
*conn
, struct iscsi_cmd
*cmd
)
499 iscsit_add_cmd_to_response_queue(cmd
, cmd
->conn
, cmd
->i_state
);
503 static void iscsit_aborted_task(struct iscsi_conn
*conn
, struct iscsi_cmd
*cmd
)
505 bool scsi_cmd
= (cmd
->iscsi_opcode
== ISCSI_OP_SCSI_CMD
);
507 spin_lock_bh(&conn
->cmd_lock
);
508 if (!list_empty(&cmd
->i_conn_node
))
509 list_del_init(&cmd
->i_conn_node
);
510 spin_unlock_bh(&conn
->cmd_lock
);
512 __iscsit_free_cmd(cmd
, scsi_cmd
, true);
515 static enum target_prot_op
iscsit_get_sup_prot_ops(struct iscsi_conn
*conn
)
517 return TARGET_PROT_NORMAL
;
520 static struct iscsit_transport iscsi_target_transport
= {
522 .transport_type
= ISCSI_TCP
,
524 .iscsit_setup_np
= iscsit_setup_np
,
525 .iscsit_accept_np
= iscsit_accept_np
,
526 .iscsit_free_np
= iscsit_free_np
,
527 .iscsit_get_login_rx
= iscsit_get_login_rx
,
528 .iscsit_put_login_tx
= iscsit_put_login_tx
,
529 .iscsit_get_dataout
= iscsit_build_r2ts_for_cmd
,
530 .iscsit_immediate_queue
= iscsit_immediate_queue
,
531 .iscsit_response_queue
= iscsit_response_queue
,
532 .iscsit_queue_data_in
= iscsit_queue_rsp
,
533 .iscsit_queue_status
= iscsit_queue_rsp
,
534 .iscsit_aborted_task
= iscsit_aborted_task
,
535 .iscsit_get_sup_prot_ops
= iscsit_get_sup_prot_ops
,
538 static int __init
iscsi_target_init_module(void)
542 pr_debug("iSCSI-Target "ISCSIT_VERSION
"\n");
544 iscsit_global
= kzalloc(sizeof(struct iscsit_global
), GFP_KERNEL
);
545 if (!iscsit_global
) {
546 pr_err("Unable to allocate memory for iscsit_global\n");
549 mutex_init(&auth_id_lock
);
550 spin_lock_init(&sess_idr_lock
);
554 ret
= iscsi_target_register_configfs();
558 ret
= iscsi_thread_set_init();
562 if (iscsi_allocate_thread_sets(TARGET_THREAD_SET_COUNT
) !=
563 TARGET_THREAD_SET_COUNT
) {
564 pr_err("iscsi_allocate_thread_sets() returned"
565 " unexpected value!\n");
569 lio_qr_cache
= kmem_cache_create("lio_qr_cache",
570 sizeof(struct iscsi_queue_req
),
571 __alignof__(struct iscsi_queue_req
), 0, NULL
);
573 pr_err("nable to kmem_cache_create() for"
578 lio_dr_cache
= kmem_cache_create("lio_dr_cache",
579 sizeof(struct iscsi_datain_req
),
580 __alignof__(struct iscsi_datain_req
), 0, NULL
);
582 pr_err("Unable to kmem_cache_create() for"
587 lio_ooo_cache
= kmem_cache_create("lio_ooo_cache",
588 sizeof(struct iscsi_ooo_cmdsn
),
589 __alignof__(struct iscsi_ooo_cmdsn
), 0, NULL
);
590 if (!lio_ooo_cache
) {
591 pr_err("Unable to kmem_cache_create() for"
596 lio_r2t_cache
= kmem_cache_create("lio_r2t_cache",
597 sizeof(struct iscsi_r2t
), __alignof__(struct iscsi_r2t
),
599 if (!lio_r2t_cache
) {
600 pr_err("Unable to kmem_cache_create() for"
605 iscsit_register_transport(&iscsi_target_transport
);
607 if (iscsit_load_discovery_tpg() < 0)
612 kmem_cache_destroy(lio_r2t_cache
);
614 kmem_cache_destroy(lio_ooo_cache
);
616 kmem_cache_destroy(lio_dr_cache
);
618 kmem_cache_destroy(lio_qr_cache
);
620 iscsi_deallocate_thread_sets();
622 iscsi_thread_set_free();
624 iscsi_target_deregister_configfs();
626 kfree(iscsit_global
);
630 static void __exit
iscsi_target_cleanup_module(void)
632 iscsi_deallocate_thread_sets();
633 iscsi_thread_set_free();
634 iscsit_release_discovery_tpg();
635 iscsit_unregister_transport(&iscsi_target_transport
);
636 kmem_cache_destroy(lio_qr_cache
);
637 kmem_cache_destroy(lio_dr_cache
);
638 kmem_cache_destroy(lio_ooo_cache
);
639 kmem_cache_destroy(lio_r2t_cache
);
641 iscsi_target_deregister_configfs();
643 kfree(iscsit_global
);
646 static int iscsit_add_reject(
647 struct iscsi_conn
*conn
,
651 struct iscsi_cmd
*cmd
;
653 cmd
= iscsit_allocate_cmd(conn
, TASK_INTERRUPTIBLE
);
657 cmd
->iscsi_opcode
= ISCSI_OP_REJECT
;
658 cmd
->reject_reason
= reason
;
660 cmd
->buf_ptr
= kmemdup(buf
, ISCSI_HDR_LEN
, GFP_KERNEL
);
662 pr_err("Unable to allocate memory for cmd->buf_ptr\n");
663 iscsit_free_cmd(cmd
, false);
667 spin_lock_bh(&conn
->cmd_lock
);
668 list_add_tail(&cmd
->i_conn_node
, &conn
->conn_cmd_list
);
669 spin_unlock_bh(&conn
->cmd_lock
);
671 cmd
->i_state
= ISTATE_SEND_REJECT
;
672 iscsit_add_cmd_to_response_queue(cmd
, conn
, cmd
->i_state
);
677 static int iscsit_add_reject_from_cmd(
678 struct iscsi_cmd
*cmd
,
683 struct iscsi_conn
*conn
;
686 pr_err("cmd->conn is NULL for ITT: 0x%08x\n",
692 cmd
->iscsi_opcode
= ISCSI_OP_REJECT
;
693 cmd
->reject_reason
= reason
;
695 cmd
->buf_ptr
= kmemdup(buf
, ISCSI_HDR_LEN
, GFP_KERNEL
);
697 pr_err("Unable to allocate memory for cmd->buf_ptr\n");
698 iscsit_free_cmd(cmd
, false);
703 spin_lock_bh(&conn
->cmd_lock
);
704 list_add_tail(&cmd
->i_conn_node
, &conn
->conn_cmd_list
);
705 spin_unlock_bh(&conn
->cmd_lock
);
708 cmd
->i_state
= ISTATE_SEND_REJECT
;
709 iscsit_add_cmd_to_response_queue(cmd
, conn
, cmd
->i_state
);
711 * Perform the kref_put now if se_cmd has already been setup by
712 * scsit_setup_scsi_cmd()
714 if (cmd
->se_cmd
.se_tfo
!= NULL
) {
715 pr_debug("iscsi reject: calling target_put_sess_cmd >>>>>>\n");
716 target_put_sess_cmd(conn
->sess
->se_sess
, &cmd
->se_cmd
);
721 static int iscsit_add_reject_cmd(struct iscsi_cmd
*cmd
, u8 reason
,
724 return iscsit_add_reject_from_cmd(cmd
, reason
, true, buf
);
727 int iscsit_reject_cmd(struct iscsi_cmd
*cmd
, u8 reason
, unsigned char *buf
)
729 return iscsit_add_reject_from_cmd(cmd
, reason
, false, buf
);
733 * Map some portion of the allocated scatterlist to an iovec, suitable for
734 * kernel sockets to copy data in/out.
736 static int iscsit_map_iovec(
737 struct iscsi_cmd
*cmd
,
743 struct scatterlist
*sg
;
744 unsigned int page_off
;
747 * We know each entry in t_data_sg contains a page.
749 sg
= &cmd
->se_cmd
.t_data_sg
[data_offset
/ PAGE_SIZE
];
750 page_off
= (data_offset
% PAGE_SIZE
);
752 cmd
->first_data_sg
= sg
;
753 cmd
->first_data_sg_off
= page_off
;
755 while (data_length
) {
756 u32 cur_len
= min_t(u32
, data_length
, sg
->length
- page_off
);
758 iov
[i
].iov_base
= kmap(sg_page(sg
)) + sg
->offset
+ page_off
;
759 iov
[i
].iov_len
= cur_len
;
761 data_length
-= cur_len
;
767 cmd
->kmapped_nents
= i
;
772 static void iscsit_unmap_iovec(struct iscsi_cmd
*cmd
)
775 struct scatterlist
*sg
;
777 sg
= cmd
->first_data_sg
;
779 for (i
= 0; i
< cmd
->kmapped_nents
; i
++)
780 kunmap(sg_page(&sg
[i
]));
783 static void iscsit_ack_from_expstatsn(struct iscsi_conn
*conn
, u32 exp_statsn
)
786 struct iscsi_cmd
*cmd
, *cmd_p
;
788 conn
->exp_statsn
= exp_statsn
;
790 if (conn
->sess
->sess_ops
->RDMAExtensions
)
793 spin_lock_bh(&conn
->cmd_lock
);
794 list_for_each_entry_safe(cmd
, cmd_p
, &conn
->conn_cmd_list
, i_conn_node
) {
795 spin_lock(&cmd
->istate_lock
);
796 if ((cmd
->i_state
== ISTATE_SENT_STATUS
) &&
797 iscsi_sna_lt(cmd
->stat_sn
, exp_statsn
)) {
798 cmd
->i_state
= ISTATE_REMOVE
;
799 spin_unlock(&cmd
->istate_lock
);
800 list_move_tail(&cmd
->i_conn_node
, &ack_list
);
803 spin_unlock(&cmd
->istate_lock
);
805 spin_unlock_bh(&conn
->cmd_lock
);
807 list_for_each_entry_safe(cmd
, cmd_p
, &ack_list
, i_conn_node
) {
808 list_del_init(&cmd
->i_conn_node
);
809 iscsit_free_cmd(cmd
, false);
813 static int iscsit_allocate_iovecs(struct iscsi_cmd
*cmd
)
815 u32 iov_count
= max(1UL, DIV_ROUND_UP(cmd
->se_cmd
.data_length
, PAGE_SIZE
));
817 iov_count
+= ISCSI_IOV_DATA_BUFFER
;
819 cmd
->iov_data
= kzalloc(iov_count
* sizeof(struct kvec
), GFP_KERNEL
);
820 if (!cmd
->iov_data
) {
821 pr_err("Unable to allocate cmd->iov_data\n");
825 cmd
->orig_iov_data_count
= iov_count
;
829 int iscsit_setup_scsi_cmd(struct iscsi_conn
*conn
, struct iscsi_cmd
*cmd
,
832 int data_direction
, payload_length
;
833 struct iscsi_scsi_req
*hdr
;
837 atomic_long_inc(&conn
->sess
->cmd_pdus
);
839 hdr
= (struct iscsi_scsi_req
*) buf
;
840 payload_length
= ntoh24(hdr
->dlength
);
842 /* FIXME; Add checks for AdditionalHeaderSegment */
844 if (!(hdr
->flags
& ISCSI_FLAG_CMD_WRITE
) &&
845 !(hdr
->flags
& ISCSI_FLAG_CMD_FINAL
)) {
846 pr_err("ISCSI_FLAG_CMD_WRITE & ISCSI_FLAG_CMD_FINAL"
847 " not set. Bad iSCSI Initiator.\n");
848 return iscsit_add_reject_cmd(cmd
,
849 ISCSI_REASON_BOOKMARK_INVALID
, buf
);
852 if (((hdr
->flags
& ISCSI_FLAG_CMD_READ
) ||
853 (hdr
->flags
& ISCSI_FLAG_CMD_WRITE
)) && !hdr
->data_length
) {
855 * From RFC-3720 Section 10.3.1:
857 * "Either or both of R and W MAY be 1 when either the
858 * Expected Data Transfer Length and/or Bidirectional Read
859 * Expected Data Transfer Length are 0"
861 * For this case, go ahead and clear the unnecssary bits
862 * to avoid any confusion with ->data_direction.
864 hdr
->flags
&= ~ISCSI_FLAG_CMD_READ
;
865 hdr
->flags
&= ~ISCSI_FLAG_CMD_WRITE
;
867 pr_warn("ISCSI_FLAG_CMD_READ or ISCSI_FLAG_CMD_WRITE"
868 " set when Expected Data Transfer Length is 0 for"
869 " CDB: 0x%02x, Fixing up flags\n", hdr
->cdb
[0]);
872 if (!(hdr
->flags
& ISCSI_FLAG_CMD_READ
) &&
873 !(hdr
->flags
& ISCSI_FLAG_CMD_WRITE
) && (hdr
->data_length
!= 0)) {
874 pr_err("ISCSI_FLAG_CMD_READ and/or ISCSI_FLAG_CMD_WRITE"
875 " MUST be set if Expected Data Transfer Length is not 0."
876 " Bad iSCSI Initiator\n");
877 return iscsit_add_reject_cmd(cmd
,
878 ISCSI_REASON_BOOKMARK_INVALID
, buf
);
881 if ((hdr
->flags
& ISCSI_FLAG_CMD_READ
) &&
882 (hdr
->flags
& ISCSI_FLAG_CMD_WRITE
)) {
883 pr_err("Bidirectional operations not supported!\n");
884 return iscsit_add_reject_cmd(cmd
,
885 ISCSI_REASON_BOOKMARK_INVALID
, buf
);
888 if (hdr
->opcode
& ISCSI_OP_IMMEDIATE
) {
889 pr_err("Illegally set Immediate Bit in iSCSI Initiator"
890 " Scsi Command PDU.\n");
891 return iscsit_add_reject_cmd(cmd
,
892 ISCSI_REASON_BOOKMARK_INVALID
, buf
);
895 if (payload_length
&& !conn
->sess
->sess_ops
->ImmediateData
) {
896 pr_err("ImmediateData=No but DataSegmentLength=%u,"
897 " protocol error.\n", payload_length
);
898 return iscsit_add_reject_cmd(cmd
,
899 ISCSI_REASON_PROTOCOL_ERROR
, buf
);
902 if ((be32_to_cpu(hdr
->data_length
) == payload_length
) &&
903 (!(hdr
->flags
& ISCSI_FLAG_CMD_FINAL
))) {
904 pr_err("Expected Data Transfer Length and Length of"
905 " Immediate Data are the same, but ISCSI_FLAG_CMD_FINAL"
906 " bit is not set protocol error\n");
907 return iscsit_add_reject_cmd(cmd
,
908 ISCSI_REASON_PROTOCOL_ERROR
, buf
);
911 if (payload_length
> be32_to_cpu(hdr
->data_length
)) {
912 pr_err("DataSegmentLength: %u is greater than"
913 " EDTL: %u, protocol error.\n", payload_length
,
915 return iscsit_add_reject_cmd(cmd
,
916 ISCSI_REASON_PROTOCOL_ERROR
, buf
);
919 if (payload_length
> conn
->conn_ops
->MaxXmitDataSegmentLength
) {
920 pr_err("DataSegmentLength: %u is greater than"
921 " MaxXmitDataSegmentLength: %u, protocol error.\n",
922 payload_length
, conn
->conn_ops
->MaxXmitDataSegmentLength
);
923 return iscsit_add_reject_cmd(cmd
,
924 ISCSI_REASON_PROTOCOL_ERROR
, buf
);
927 if (payload_length
> conn
->sess
->sess_ops
->FirstBurstLength
) {
928 pr_err("DataSegmentLength: %u is greater than"
929 " FirstBurstLength: %u, protocol error.\n",
930 payload_length
, conn
->sess
->sess_ops
->FirstBurstLength
);
931 return iscsit_add_reject_cmd(cmd
,
932 ISCSI_REASON_BOOKMARK_INVALID
, buf
);
935 data_direction
= (hdr
->flags
& ISCSI_FLAG_CMD_WRITE
) ? DMA_TO_DEVICE
:
936 (hdr
->flags
& ISCSI_FLAG_CMD_READ
) ? DMA_FROM_DEVICE
:
939 cmd
->data_direction
= data_direction
;
940 iscsi_task_attr
= hdr
->flags
& ISCSI_FLAG_CMD_ATTR_MASK
;
942 * Figure out the SAM Task Attribute for the incoming SCSI CDB
944 if ((iscsi_task_attr
== ISCSI_ATTR_UNTAGGED
) ||
945 (iscsi_task_attr
== ISCSI_ATTR_SIMPLE
))
946 sam_task_attr
= MSG_SIMPLE_TAG
;
947 else if (iscsi_task_attr
== ISCSI_ATTR_ORDERED
)
948 sam_task_attr
= MSG_ORDERED_TAG
;
949 else if (iscsi_task_attr
== ISCSI_ATTR_HEAD_OF_QUEUE
)
950 sam_task_attr
= MSG_HEAD_TAG
;
951 else if (iscsi_task_attr
== ISCSI_ATTR_ACA
)
952 sam_task_attr
= MSG_ACA_TAG
;
954 pr_debug("Unknown iSCSI Task Attribute: 0x%02x, using"
955 " MSG_SIMPLE_TAG\n", iscsi_task_attr
);
956 sam_task_attr
= MSG_SIMPLE_TAG
;
959 cmd
->iscsi_opcode
= ISCSI_OP_SCSI_CMD
;
960 cmd
->i_state
= ISTATE_NEW_CMD
;
961 cmd
->immediate_cmd
= ((hdr
->opcode
& ISCSI_OP_IMMEDIATE
) ? 1 : 0);
962 cmd
->immediate_data
= (payload_length
) ? 1 : 0;
963 cmd
->unsolicited_data
= ((!(hdr
->flags
& ISCSI_FLAG_CMD_FINAL
) &&
964 (hdr
->flags
& ISCSI_FLAG_CMD_WRITE
)) ? 1 : 0);
965 if (cmd
->unsolicited_data
)
966 cmd
->cmd_flags
|= ICF_NON_IMMEDIATE_UNSOLICITED_DATA
;
968 conn
->sess
->init_task_tag
= cmd
->init_task_tag
= hdr
->itt
;
969 if (hdr
->flags
& ISCSI_FLAG_CMD_READ
) {
970 spin_lock_bh(&conn
->sess
->ttt_lock
);
971 cmd
->targ_xfer_tag
= conn
->sess
->targ_xfer_tag
++;
972 if (cmd
->targ_xfer_tag
== 0xFFFFFFFF)
973 cmd
->targ_xfer_tag
= conn
->sess
->targ_xfer_tag
++;
974 spin_unlock_bh(&conn
->sess
->ttt_lock
);
975 } else if (hdr
->flags
& ISCSI_FLAG_CMD_WRITE
)
976 cmd
->targ_xfer_tag
= 0xFFFFFFFF;
977 cmd
->cmd_sn
= be32_to_cpu(hdr
->cmdsn
);
978 cmd
->exp_stat_sn
= be32_to_cpu(hdr
->exp_statsn
);
979 cmd
->first_burst_len
= payload_length
;
981 if (!conn
->sess
->sess_ops
->RDMAExtensions
&&
982 cmd
->data_direction
== DMA_FROM_DEVICE
) {
983 struct iscsi_datain_req
*dr
;
985 dr
= iscsit_allocate_datain_req();
987 return iscsit_add_reject_cmd(cmd
,
988 ISCSI_REASON_BOOKMARK_NO_RESOURCES
, buf
);
990 iscsit_attach_datain_req(cmd
, dr
);
994 * Initialize struct se_cmd descriptor from target_core_mod infrastructure
996 transport_init_se_cmd(&cmd
->se_cmd
, &lio_target_fabric_configfs
->tf_ops
,
997 conn
->sess
->se_sess
, be32_to_cpu(hdr
->data_length
),
998 cmd
->data_direction
, sam_task_attr
,
999 cmd
->sense_buffer
+ 2);
1001 pr_debug("Got SCSI Command, ITT: 0x%08x, CmdSN: 0x%08x,"
1002 " ExpXferLen: %u, Length: %u, CID: %hu\n", hdr
->itt
,
1003 hdr
->cmdsn
, be32_to_cpu(hdr
->data_length
), payload_length
,
1006 target_get_sess_cmd(conn
->sess
->se_sess
, &cmd
->se_cmd
, true);
1008 cmd
->sense_reason
= transport_lookup_cmd_lun(&cmd
->se_cmd
,
1009 scsilun_to_int(&hdr
->lun
));
1010 if (cmd
->sense_reason
)
1013 cmd
->sense_reason
= target_setup_cmd_from_cdb(&cmd
->se_cmd
, hdr
->cdb
);
1014 if (cmd
->sense_reason
) {
1015 if (cmd
->sense_reason
== TCM_OUT_OF_RESOURCES
) {
1016 return iscsit_add_reject_cmd(cmd
,
1017 ISCSI_REASON_BOOKMARK_NO_RESOURCES
, buf
);
1023 if (iscsit_build_pdu_and_seq_lists(cmd
, payload_length
) < 0) {
1024 return iscsit_add_reject_cmd(cmd
,
1025 ISCSI_REASON_BOOKMARK_NO_RESOURCES
, buf
);
1029 spin_lock_bh(&conn
->cmd_lock
);
1030 list_add_tail(&cmd
->i_conn_node
, &conn
->conn_cmd_list
);
1031 spin_unlock_bh(&conn
->cmd_lock
);
1033 * Check if we need to delay processing because of ALUA
1034 * Active/NonOptimized primary access state..
1036 core_alua_check_nonop_delay(&cmd
->se_cmd
);
1040 EXPORT_SYMBOL(iscsit_setup_scsi_cmd
);
1042 void iscsit_set_unsoliticed_dataout(struct iscsi_cmd
*cmd
)
1044 iscsit_set_dataout_sequence_values(cmd
);
1046 spin_lock_bh(&cmd
->dataout_timeout_lock
);
1047 iscsit_start_dataout_timer(cmd
, cmd
->conn
);
1048 spin_unlock_bh(&cmd
->dataout_timeout_lock
);
1050 EXPORT_SYMBOL(iscsit_set_unsoliticed_dataout
);
1052 int iscsit_process_scsi_cmd(struct iscsi_conn
*conn
, struct iscsi_cmd
*cmd
,
1053 struct iscsi_scsi_req
*hdr
)
1057 * Check the CmdSN against ExpCmdSN/MaxCmdSN here if
1058 * the Immediate Bit is not set, and no Immediate
1061 * A PDU/CmdSN carrying Immediate Data can only
1062 * be processed after the DataCRC has passed.
1063 * If the DataCRC fails, the CmdSN MUST NOT
1064 * be acknowledged. (See below)
1066 if (!cmd
->immediate_data
) {
1067 cmdsn_ret
= iscsit_sequence_cmd(conn
, cmd
,
1068 (unsigned char *)hdr
, hdr
->cmdsn
);
1069 if (cmdsn_ret
== CMDSN_ERROR_CANNOT_RECOVER
)
1071 else if (cmdsn_ret
== CMDSN_LOWER_THAN_EXP
) {
1072 target_put_sess_cmd(conn
->sess
->se_sess
, &cmd
->se_cmd
);
1077 iscsit_ack_from_expstatsn(conn
, be32_to_cpu(hdr
->exp_statsn
));
1080 * If no Immediate Data is attached, it's OK to return now.
1082 if (!cmd
->immediate_data
) {
1083 if (!cmd
->sense_reason
&& cmd
->unsolicited_data
)
1084 iscsit_set_unsoliticed_dataout(cmd
);
1085 if (!cmd
->sense_reason
)
1088 target_put_sess_cmd(conn
->sess
->se_sess
, &cmd
->se_cmd
);
1093 * Early CHECK_CONDITIONs with ImmediateData never make it to command
1094 * execution. These exceptions are processed in CmdSN order using
1095 * iscsit_check_received_cmdsn() in iscsit_get_immediate_data() below.
1097 if (cmd
->sense_reason
) {
1098 if (cmd
->reject_reason
)
1104 * Call directly into transport_generic_new_cmd() to perform
1105 * the backend memory allocation.
1107 cmd
->sense_reason
= transport_generic_new_cmd(&cmd
->se_cmd
);
1108 if (cmd
->sense_reason
)
1113 EXPORT_SYMBOL(iscsit_process_scsi_cmd
);
1116 iscsit_get_immediate_data(struct iscsi_cmd
*cmd
, struct iscsi_scsi_req
*hdr
,
1119 struct iscsi_conn
*conn
= cmd
->conn
;
1120 int cmdsn_ret
= 0, immed_ret
= IMMEDIATE_DATA_NORMAL_OPERATION
;
1122 * Special case for Unsupported SAM WRITE Opcodes and ImmediateData=Yes.
1125 goto after_immediate_data
;
1127 immed_ret
= iscsit_handle_immediate_data(cmd
, hdr
,
1128 cmd
->first_burst_len
);
1129 after_immediate_data
:
1130 if (immed_ret
== IMMEDIATE_DATA_NORMAL_OPERATION
) {
1132 * A PDU/CmdSN carrying Immediate Data passed
1133 * DataCRC, check against ExpCmdSN/MaxCmdSN if
1134 * Immediate Bit is not set.
1136 cmdsn_ret
= iscsit_sequence_cmd(cmd
->conn
, cmd
,
1137 (unsigned char *)hdr
, hdr
->cmdsn
);
1138 if (cmdsn_ret
== CMDSN_ERROR_CANNOT_RECOVER
)
1141 if (cmd
->sense_reason
|| cmdsn_ret
== CMDSN_LOWER_THAN_EXP
) {
1144 rc
= iscsit_dump_data_payload(cmd
->conn
,
1145 cmd
->first_burst_len
, 1);
1146 target_put_sess_cmd(conn
->sess
->se_sess
, &cmd
->se_cmd
);
1148 } else if (cmd
->unsolicited_data
)
1149 iscsit_set_unsoliticed_dataout(cmd
);
1151 } else if (immed_ret
== IMMEDIATE_DATA_ERL1_CRC_FAILURE
) {
1153 * Immediate Data failed DataCRC and ERL>=1,
1154 * silently drop this PDU and let the initiator
1155 * plug the CmdSN gap.
1157 * FIXME: Send Unsolicited NOPIN with reserved
1158 * TTT here to help the initiator figure out
1159 * the missing CmdSN, although they should be
1160 * intelligent enough to determine the missing
1161 * CmdSN and issue a retry to plug the sequence.
1163 cmd
->i_state
= ISTATE_REMOVE
;
1164 iscsit_add_cmd_to_immediate_queue(cmd
, cmd
->conn
, cmd
->i_state
);
1165 } else /* immed_ret == IMMEDIATE_DATA_CANNOT_RECOVER */
1172 iscsit_handle_scsi_cmd(struct iscsi_conn
*conn
, struct iscsi_cmd
*cmd
,
1175 struct iscsi_scsi_req
*hdr
= (struct iscsi_scsi_req
*)buf
;
1177 bool dump_payload
= false;
1179 rc
= iscsit_setup_scsi_cmd(conn
, cmd
, buf
);
1183 * Allocation iovecs needed for struct socket operations for
1184 * traditional iSCSI block I/O.
1186 if (iscsit_allocate_iovecs(cmd
) < 0) {
1187 return iscsit_add_reject_cmd(cmd
,
1188 ISCSI_REASON_BOOKMARK_NO_RESOURCES
, buf
);
1190 immed_data
= cmd
->immediate_data
;
1192 rc
= iscsit_process_scsi_cmd(conn
, cmd
, hdr
);
1196 dump_payload
= true;
1201 return iscsit_get_immediate_data(cmd
, hdr
, dump_payload
);
1204 static u32
iscsit_do_crypto_hash_sg(
1205 struct hash_desc
*hash
,
1206 struct iscsi_cmd
*cmd
,
1214 struct scatterlist
*sg
;
1215 unsigned int page_off
;
1217 crypto_hash_init(hash
);
1219 sg
= cmd
->first_data_sg
;
1220 page_off
= cmd
->first_data_sg_off
;
1223 while (data_length
) {
1224 u32 cur_len
= min_t(u32
, data_length
, (sg
[i
].length
- page_off
));
1226 crypto_hash_update(hash
, &sg
[i
], cur_len
);
1228 data_length
-= cur_len
;
1234 struct scatterlist pad_sg
;
1236 sg_init_one(&pad_sg
, pad_bytes
, padding
);
1237 crypto_hash_update(hash
, &pad_sg
, padding
);
1239 crypto_hash_final(hash
, (u8
*) &data_crc
);
1244 static void iscsit_do_crypto_hash_buf(
1245 struct hash_desc
*hash
,
1252 struct scatterlist sg
;
1254 crypto_hash_init(hash
);
1256 sg_init_one(&sg
, buf
, payload_length
);
1257 crypto_hash_update(hash
, &sg
, payload_length
);
1260 sg_init_one(&sg
, pad_bytes
, padding
);
1261 crypto_hash_update(hash
, &sg
, padding
);
1263 crypto_hash_final(hash
, data_crc
);
1267 iscsit_check_dataout_hdr(struct iscsi_conn
*conn
, unsigned char *buf
,
1268 struct iscsi_cmd
**out_cmd
)
1270 struct iscsi_data
*hdr
= (struct iscsi_data
*)buf
;
1271 struct iscsi_cmd
*cmd
= NULL
;
1272 struct se_cmd
*se_cmd
;
1273 u32 payload_length
= ntoh24(hdr
->dlength
);
1276 if (!payload_length
) {
1277 pr_warn("DataOUT payload is ZERO, ignoring.\n");
1282 atomic_long_add(payload_length
, &conn
->sess
->rx_data_octets
);
1284 if (payload_length
> conn
->conn_ops
->MaxXmitDataSegmentLength
) {
1285 pr_err("DataSegmentLength: %u is greater than"
1286 " MaxXmitDataSegmentLength: %u\n", payload_length
,
1287 conn
->conn_ops
->MaxXmitDataSegmentLength
);
1288 return iscsit_add_reject(conn
, ISCSI_REASON_PROTOCOL_ERROR
,
1292 cmd
= iscsit_find_cmd_from_itt_or_dump(conn
, hdr
->itt
,
1297 pr_debug("Got DataOut ITT: 0x%08x, TTT: 0x%08x,"
1298 " DataSN: 0x%08x, Offset: %u, Length: %u, CID: %hu\n",
1299 hdr
->itt
, hdr
->ttt
, hdr
->datasn
, ntohl(hdr
->offset
),
1300 payload_length
, conn
->cid
);
1302 if (cmd
->cmd_flags
& ICF_GOT_LAST_DATAOUT
) {
1303 pr_err("Command ITT: 0x%08x received DataOUT after"
1304 " last DataOUT received, dumping payload\n",
1305 cmd
->init_task_tag
);
1306 return iscsit_dump_data_payload(conn
, payload_length
, 1);
1309 if (cmd
->data_direction
!= DMA_TO_DEVICE
) {
1310 pr_err("Command ITT: 0x%08x received DataOUT for a"
1311 " NON-WRITE command.\n", cmd
->init_task_tag
);
1312 return iscsit_dump_data_payload(conn
, payload_length
, 1);
1314 se_cmd
= &cmd
->se_cmd
;
1315 iscsit_mod_dataout_timer(cmd
);
1317 if ((be32_to_cpu(hdr
->offset
) + payload_length
) > cmd
->se_cmd
.data_length
) {
1318 pr_err("DataOut Offset: %u, Length %u greater than"
1319 " iSCSI Command EDTL %u, protocol error.\n",
1320 hdr
->offset
, payload_length
, cmd
->se_cmd
.data_length
);
1321 return iscsit_reject_cmd(cmd
, ISCSI_REASON_BOOKMARK_INVALID
, buf
);
1324 if (cmd
->unsolicited_data
) {
1325 int dump_unsolicited_data
= 0;
1327 if (conn
->sess
->sess_ops
->InitialR2T
) {
1328 pr_err("Received unexpected unsolicited data"
1329 " while InitialR2T=Yes, protocol error.\n");
1330 transport_send_check_condition_and_sense(&cmd
->se_cmd
,
1331 TCM_UNEXPECTED_UNSOLICITED_DATA
, 0);
1335 * Special case for dealing with Unsolicited DataOUT
1336 * and Unsupported SAM WRITE Opcodes and SE resource allocation
1340 /* Something's amiss if we're not in WRITE_PENDING state... */
1341 WARN_ON(se_cmd
->t_state
!= TRANSPORT_WRITE_PENDING
);
1342 if (!(se_cmd
->se_cmd_flags
& SCF_SUPPORTED_SAM_OPCODE
))
1343 dump_unsolicited_data
= 1;
1345 if (dump_unsolicited_data
) {
1347 * Check if a delayed TASK_ABORTED status needs to
1348 * be sent now if the ISCSI_FLAG_CMD_FINAL has been
1349 * received with the unsolicitied data out.
1351 if (hdr
->flags
& ISCSI_FLAG_CMD_FINAL
)
1352 iscsit_stop_dataout_timer(cmd
);
1354 transport_check_aborted_status(se_cmd
,
1355 (hdr
->flags
& ISCSI_FLAG_CMD_FINAL
));
1356 return iscsit_dump_data_payload(conn
, payload_length
, 1);
1360 * For the normal solicited data path:
1362 * Check for a delayed TASK_ABORTED status and dump any
1363 * incoming data out payload if one exists. Also, when the
1364 * ISCSI_FLAG_CMD_FINAL is set to denote the end of the current
1365 * data out sequence, we decrement outstanding_r2ts. Once
1366 * outstanding_r2ts reaches zero, go ahead and send the delayed
1367 * TASK_ABORTED status.
1369 if (se_cmd
->transport_state
& CMD_T_ABORTED
) {
1370 if (hdr
->flags
& ISCSI_FLAG_CMD_FINAL
)
1371 if (--cmd
->outstanding_r2ts
< 1) {
1372 iscsit_stop_dataout_timer(cmd
);
1373 transport_check_aborted_status(
1377 return iscsit_dump_data_payload(conn
, payload_length
, 1);
1381 * Preform DataSN, DataSequenceInOrder, DataPDUInOrder, and
1382 * within-command recovery checks before receiving the payload.
1384 rc
= iscsit_check_pre_dataout(cmd
, buf
);
1385 if (rc
== DATAOUT_WITHIN_COMMAND_RECOVERY
)
1387 else if (rc
== DATAOUT_CANNOT_RECOVER
)
1393 EXPORT_SYMBOL(iscsit_check_dataout_hdr
);
1396 iscsit_get_dataout(struct iscsi_conn
*conn
, struct iscsi_cmd
*cmd
,
1397 struct iscsi_data
*hdr
)
1400 u32 checksum
, iov_count
= 0, padding
= 0, rx_got
= 0, rx_size
= 0;
1401 u32 payload_length
= ntoh24(hdr
->dlength
);
1402 int iov_ret
, data_crc_failed
= 0;
1404 rx_size
+= payload_length
;
1405 iov
= &cmd
->iov_data
[0];
1407 iov_ret
= iscsit_map_iovec(cmd
, iov
, be32_to_cpu(hdr
->offset
),
1412 iov_count
+= iov_ret
;
1414 padding
= ((-payload_length
) & 3);
1416 iov
[iov_count
].iov_base
= cmd
->pad_bytes
;
1417 iov
[iov_count
++].iov_len
= padding
;
1419 pr_debug("Receiving %u padding bytes.\n", padding
);
1422 if (conn
->conn_ops
->DataDigest
) {
1423 iov
[iov_count
].iov_base
= &checksum
;
1424 iov
[iov_count
++].iov_len
= ISCSI_CRC_LEN
;
1425 rx_size
+= ISCSI_CRC_LEN
;
1428 rx_got
= rx_data(conn
, &cmd
->iov_data
[0], iov_count
, rx_size
);
1430 iscsit_unmap_iovec(cmd
);
1432 if (rx_got
!= rx_size
)
1435 if (conn
->conn_ops
->DataDigest
) {
1438 data_crc
= iscsit_do_crypto_hash_sg(&conn
->conn_rx_hash
, cmd
,
1439 be32_to_cpu(hdr
->offset
),
1440 payload_length
, padding
,
1443 if (checksum
!= data_crc
) {
1444 pr_err("ITT: 0x%08x, Offset: %u, Length: %u,"
1445 " DataSN: 0x%08x, CRC32C DataDigest 0x%08x"
1446 " does not match computed 0x%08x\n",
1447 hdr
->itt
, hdr
->offset
, payload_length
,
1448 hdr
->datasn
, checksum
, data_crc
);
1449 data_crc_failed
= 1;
1451 pr_debug("Got CRC32C DataDigest 0x%08x for"
1452 " %u bytes of Data Out\n", checksum
,
1457 return data_crc_failed
;
1461 iscsit_check_dataout_payload(struct iscsi_cmd
*cmd
, struct iscsi_data
*hdr
,
1462 bool data_crc_failed
)
1464 struct iscsi_conn
*conn
= cmd
->conn
;
1467 * Increment post receive data and CRC values or perform
1468 * within-command recovery.
1470 rc
= iscsit_check_post_dataout(cmd
, (unsigned char *)hdr
, data_crc_failed
);
1471 if ((rc
== DATAOUT_NORMAL
) || (rc
== DATAOUT_WITHIN_COMMAND_RECOVERY
))
1473 else if (rc
== DATAOUT_SEND_R2T
) {
1474 iscsit_set_dataout_sequence_values(cmd
);
1475 conn
->conn_transport
->iscsit_get_dataout(conn
, cmd
, false);
1476 } else if (rc
== DATAOUT_SEND_TO_TRANSPORT
) {
1478 * Handle extra special case for out of order
1479 * Unsolicited Data Out.
1481 spin_lock_bh(&cmd
->istate_lock
);
1482 ooo_cmdsn
= (cmd
->cmd_flags
& ICF_OOO_CMDSN
);
1483 cmd
->cmd_flags
|= ICF_GOT_LAST_DATAOUT
;
1484 cmd
->i_state
= ISTATE_RECEIVED_LAST_DATAOUT
;
1485 spin_unlock_bh(&cmd
->istate_lock
);
1487 iscsit_stop_dataout_timer(cmd
);
1490 target_execute_cmd(&cmd
->se_cmd
);
1492 } else /* DATAOUT_CANNOT_RECOVER */
1497 EXPORT_SYMBOL(iscsit_check_dataout_payload
);
1499 static int iscsit_handle_data_out(struct iscsi_conn
*conn
, unsigned char *buf
)
1501 struct iscsi_cmd
*cmd
= NULL
;
1502 struct iscsi_data
*hdr
= (struct iscsi_data
*)buf
;
1504 bool data_crc_failed
= false;
1506 rc
= iscsit_check_dataout_hdr(conn
, buf
, &cmd
);
1512 rc
= iscsit_get_dataout(conn
, cmd
, hdr
);
1516 data_crc_failed
= true;
1518 return iscsit_check_dataout_payload(cmd
, hdr
, data_crc_failed
);
1521 int iscsit_setup_nop_out(struct iscsi_conn
*conn
, struct iscsi_cmd
*cmd
,
1522 struct iscsi_nopout
*hdr
)
1524 u32 payload_length
= ntoh24(hdr
->dlength
);
1526 if (!(hdr
->flags
& ISCSI_FLAG_CMD_FINAL
)) {
1527 pr_err("NopOUT Flag's, Left Most Bit not set, protocol error.\n");
1529 return iscsit_add_reject(conn
, ISCSI_REASON_PROTOCOL_ERROR
,
1530 (unsigned char *)hdr
);
1532 return iscsit_reject_cmd(cmd
, ISCSI_REASON_PROTOCOL_ERROR
,
1533 (unsigned char *)hdr
);
1536 if (hdr
->itt
== RESERVED_ITT
&& !(hdr
->opcode
& ISCSI_OP_IMMEDIATE
)) {
1537 pr_err("NOPOUT ITT is reserved, but Immediate Bit is"
1538 " not set, protocol error.\n");
1540 return iscsit_add_reject(conn
, ISCSI_REASON_PROTOCOL_ERROR
,
1541 (unsigned char *)hdr
);
1543 return iscsit_reject_cmd(cmd
, ISCSI_REASON_PROTOCOL_ERROR
,
1544 (unsigned char *)hdr
);
1547 if (payload_length
> conn
->conn_ops
->MaxXmitDataSegmentLength
) {
1548 pr_err("NOPOUT Ping Data DataSegmentLength: %u is"
1549 " greater than MaxXmitDataSegmentLength: %u, protocol"
1550 " error.\n", payload_length
,
1551 conn
->conn_ops
->MaxXmitDataSegmentLength
);
1553 return iscsit_add_reject(conn
, ISCSI_REASON_PROTOCOL_ERROR
,
1554 (unsigned char *)hdr
);
1556 return iscsit_reject_cmd(cmd
, ISCSI_REASON_PROTOCOL_ERROR
,
1557 (unsigned char *)hdr
);
1560 pr_debug("Got NOPOUT Ping %s ITT: 0x%08x, TTT: 0x%08x,"
1561 " CmdSN: 0x%08x, ExpStatSN: 0x%08x, Length: %u\n",
1562 hdr
->itt
== RESERVED_ITT
? "Response" : "Request",
1563 hdr
->itt
, hdr
->ttt
, hdr
->cmdsn
, hdr
->exp_statsn
,
1566 * This is not a response to a Unsolicited NopIN, which means
1567 * it can either be a NOPOUT ping request (with a valid ITT),
1568 * or a NOPOUT not requesting a NOPIN (with a reserved ITT).
1569 * Either way, make sure we allocate an struct iscsi_cmd, as both
1570 * can contain ping data.
1572 if (hdr
->ttt
== cpu_to_be32(0xFFFFFFFF)) {
1573 cmd
->iscsi_opcode
= ISCSI_OP_NOOP_OUT
;
1574 cmd
->i_state
= ISTATE_SEND_NOPIN
;
1575 cmd
->immediate_cmd
= ((hdr
->opcode
& ISCSI_OP_IMMEDIATE
) ?
1577 conn
->sess
->init_task_tag
= cmd
->init_task_tag
= hdr
->itt
;
1578 cmd
->targ_xfer_tag
= 0xFFFFFFFF;
1579 cmd
->cmd_sn
= be32_to_cpu(hdr
->cmdsn
);
1580 cmd
->exp_stat_sn
= be32_to_cpu(hdr
->exp_statsn
);
1581 cmd
->data_direction
= DMA_NONE
;
1586 EXPORT_SYMBOL(iscsit_setup_nop_out
);
1588 int iscsit_process_nop_out(struct iscsi_conn
*conn
, struct iscsi_cmd
*cmd
,
1589 struct iscsi_nopout
*hdr
)
1591 struct iscsi_cmd
*cmd_p
= NULL
;
1594 * Initiator is expecting a NopIN ping reply..
1596 if (hdr
->itt
!= RESERVED_ITT
) {
1598 return iscsit_add_reject(conn
, ISCSI_REASON_PROTOCOL_ERROR
,
1599 (unsigned char *)hdr
);
1601 spin_lock_bh(&conn
->cmd_lock
);
1602 list_add_tail(&cmd
->i_conn_node
, &conn
->conn_cmd_list
);
1603 spin_unlock_bh(&conn
->cmd_lock
);
1605 iscsit_ack_from_expstatsn(conn
, be32_to_cpu(hdr
->exp_statsn
));
1607 if (hdr
->opcode
& ISCSI_OP_IMMEDIATE
) {
1608 iscsit_add_cmd_to_response_queue(cmd
, conn
,
1613 cmdsn_ret
= iscsit_sequence_cmd(conn
, cmd
,
1614 (unsigned char *)hdr
, hdr
->cmdsn
);
1615 if (cmdsn_ret
== CMDSN_LOWER_THAN_EXP
)
1617 if (cmdsn_ret
== CMDSN_ERROR_CANNOT_RECOVER
)
1623 * This was a response to a unsolicited NOPIN ping.
1625 if (hdr
->ttt
!= cpu_to_be32(0xFFFFFFFF)) {
1626 cmd_p
= iscsit_find_cmd_from_ttt(conn
, be32_to_cpu(hdr
->ttt
));
1630 iscsit_stop_nopin_response_timer(conn
);
1632 cmd_p
->i_state
= ISTATE_REMOVE
;
1633 iscsit_add_cmd_to_immediate_queue(cmd_p
, conn
, cmd_p
->i_state
);
1635 iscsit_start_nopin_timer(conn
);
1639 * Otherwise, initiator is not expecting a NOPIN is response.
1640 * Just ignore for now.
1644 EXPORT_SYMBOL(iscsit_process_nop_out
);
1646 static int iscsit_handle_nop_out(struct iscsi_conn
*conn
, struct iscsi_cmd
*cmd
,
1649 unsigned char *ping_data
= NULL
;
1650 struct iscsi_nopout
*hdr
= (struct iscsi_nopout
*)buf
;
1651 struct kvec
*iov
= NULL
;
1652 u32 payload_length
= ntoh24(hdr
->dlength
);
1655 ret
= iscsit_setup_nop_out(conn
, cmd
, hdr
);
1659 * Handle NOP-OUT payload for traditional iSCSI sockets
1661 if (payload_length
&& hdr
->ttt
== cpu_to_be32(0xFFFFFFFF)) {
1662 u32 checksum
, data_crc
, padding
= 0;
1663 int niov
= 0, rx_got
, rx_size
= payload_length
;
1665 ping_data
= kzalloc(payload_length
+ 1, GFP_KERNEL
);
1667 pr_err("Unable to allocate memory for"
1668 " NOPOUT ping data.\n");
1673 iov
= &cmd
->iov_misc
[0];
1674 iov
[niov
].iov_base
= ping_data
;
1675 iov
[niov
++].iov_len
= payload_length
;
1677 padding
= ((-payload_length
) & 3);
1679 pr_debug("Receiving %u additional bytes"
1680 " for padding.\n", padding
);
1681 iov
[niov
].iov_base
= &cmd
->pad_bytes
;
1682 iov
[niov
++].iov_len
= padding
;
1685 if (conn
->conn_ops
->DataDigest
) {
1686 iov
[niov
].iov_base
= &checksum
;
1687 iov
[niov
++].iov_len
= ISCSI_CRC_LEN
;
1688 rx_size
+= ISCSI_CRC_LEN
;
1691 rx_got
= rx_data(conn
, &cmd
->iov_misc
[0], niov
, rx_size
);
1692 if (rx_got
!= rx_size
) {
1697 if (conn
->conn_ops
->DataDigest
) {
1698 iscsit_do_crypto_hash_buf(&conn
->conn_rx_hash
,
1699 ping_data
, payload_length
,
1700 padding
, cmd
->pad_bytes
,
1703 if (checksum
!= data_crc
) {
1704 pr_err("Ping data CRC32C DataDigest"
1705 " 0x%08x does not match computed 0x%08x\n",
1706 checksum
, data_crc
);
1707 if (!conn
->sess
->sess_ops
->ErrorRecoveryLevel
) {
1708 pr_err("Unable to recover from"
1709 " NOPOUT Ping DataCRC failure while in"
1715 * Silently drop this PDU and let the
1716 * initiator plug the CmdSN gap.
1718 pr_debug("Dropping NOPOUT"
1719 " Command CmdSN: 0x%08x due to"
1720 " DataCRC error.\n", hdr
->cmdsn
);
1725 pr_debug("Got CRC32C DataDigest"
1726 " 0x%08x for %u bytes of ping data.\n",
1727 checksum
, payload_length
);
1731 ping_data
[payload_length
] = '\0';
1733 * Attach ping data to struct iscsi_cmd->buf_ptr.
1735 cmd
->buf_ptr
= ping_data
;
1736 cmd
->buf_ptr_size
= payload_length
;
1738 pr_debug("Got %u bytes of NOPOUT ping"
1739 " data.\n", payload_length
);
1740 pr_debug("Ping Data: \"%s\"\n", ping_data
);
1743 return iscsit_process_nop_out(conn
, cmd
, hdr
);
1746 iscsit_free_cmd(cmd
, false);
1753 iscsit_handle_task_mgt_cmd(struct iscsi_conn
*conn
, struct iscsi_cmd
*cmd
,
1756 struct se_tmr_req
*se_tmr
;
1757 struct iscsi_tmr_req
*tmr_req
;
1758 struct iscsi_tm
*hdr
;
1759 int out_of_order_cmdsn
= 0, ret
;
1760 bool sess_ref
= false;
1763 hdr
= (struct iscsi_tm
*) buf
;
1764 hdr
->flags
&= ~ISCSI_FLAG_CMD_FINAL
;
1765 function
= hdr
->flags
;
1767 pr_debug("Got Task Management Request ITT: 0x%08x, CmdSN:"
1768 " 0x%08x, Function: 0x%02x, RefTaskTag: 0x%08x, RefCmdSN:"
1769 " 0x%08x, CID: %hu\n", hdr
->itt
, hdr
->cmdsn
, function
,
1770 hdr
->rtt
, hdr
->refcmdsn
, conn
->cid
);
1772 if ((function
!= ISCSI_TM_FUNC_ABORT_TASK
) &&
1773 ((function
!= ISCSI_TM_FUNC_TASK_REASSIGN
) &&
1774 hdr
->rtt
!= RESERVED_ITT
)) {
1775 pr_err("RefTaskTag should be set to 0xFFFFFFFF.\n");
1776 hdr
->rtt
= RESERVED_ITT
;
1779 if ((function
== ISCSI_TM_FUNC_TASK_REASSIGN
) &&
1780 !(hdr
->opcode
& ISCSI_OP_IMMEDIATE
)) {
1781 pr_err("Task Management Request TASK_REASSIGN not"
1782 " issued as immediate command, bad iSCSI Initiator"
1783 "implementation\n");
1784 return iscsit_add_reject_cmd(cmd
,
1785 ISCSI_REASON_PROTOCOL_ERROR
, buf
);
1787 if ((function
!= ISCSI_TM_FUNC_ABORT_TASK
) &&
1788 be32_to_cpu(hdr
->refcmdsn
) != ISCSI_RESERVED_TAG
)
1789 hdr
->refcmdsn
= cpu_to_be32(ISCSI_RESERVED_TAG
);
1791 cmd
->data_direction
= DMA_NONE
;
1793 cmd
->tmr_req
= kzalloc(sizeof(struct iscsi_tmr_req
), GFP_KERNEL
);
1794 if (!cmd
->tmr_req
) {
1795 pr_err("Unable to allocate memory for"
1796 " Task Management command!\n");
1797 return iscsit_add_reject_cmd(cmd
,
1798 ISCSI_REASON_BOOKMARK_NO_RESOURCES
,
1803 * TASK_REASSIGN for ERL=2 / connection stays inside of
1804 * LIO-Target $FABRIC_MOD
1806 if (function
!= ISCSI_TM_FUNC_TASK_REASSIGN
) {
1811 transport_init_se_cmd(&cmd
->se_cmd
,
1812 &lio_target_fabric_configfs
->tf_ops
,
1813 conn
->sess
->se_sess
, 0, DMA_NONE
,
1814 MSG_SIMPLE_TAG
, cmd
->sense_buffer
+ 2);
1816 target_get_sess_cmd(conn
->sess
->se_sess
, &cmd
->se_cmd
, true);
1820 case ISCSI_TM_FUNC_ABORT_TASK
:
1821 tcm_function
= TMR_ABORT_TASK
;
1823 case ISCSI_TM_FUNC_ABORT_TASK_SET
:
1824 tcm_function
= TMR_ABORT_TASK_SET
;
1826 case ISCSI_TM_FUNC_CLEAR_ACA
:
1827 tcm_function
= TMR_CLEAR_ACA
;
1829 case ISCSI_TM_FUNC_CLEAR_TASK_SET
:
1830 tcm_function
= TMR_CLEAR_TASK_SET
;
1832 case ISCSI_TM_FUNC_LOGICAL_UNIT_RESET
:
1833 tcm_function
= TMR_LUN_RESET
;
1835 case ISCSI_TM_FUNC_TARGET_WARM_RESET
:
1836 tcm_function
= TMR_TARGET_WARM_RESET
;
1838 case ISCSI_TM_FUNC_TARGET_COLD_RESET
:
1839 tcm_function
= TMR_TARGET_COLD_RESET
;
1842 pr_err("Unknown iSCSI TMR Function:"
1843 " 0x%02x\n", function
);
1844 return iscsit_add_reject_cmd(cmd
,
1845 ISCSI_REASON_BOOKMARK_NO_RESOURCES
, buf
);
1848 ret
= core_tmr_alloc_req(&cmd
->se_cmd
, cmd
->tmr_req
,
1849 tcm_function
, GFP_KERNEL
);
1851 return iscsit_add_reject_cmd(cmd
,
1852 ISCSI_REASON_BOOKMARK_NO_RESOURCES
, buf
);
1854 cmd
->tmr_req
->se_tmr_req
= cmd
->se_cmd
.se_tmr_req
;
1857 cmd
->iscsi_opcode
= ISCSI_OP_SCSI_TMFUNC
;
1858 cmd
->i_state
= ISTATE_SEND_TASKMGTRSP
;
1859 cmd
->immediate_cmd
= ((hdr
->opcode
& ISCSI_OP_IMMEDIATE
) ? 1 : 0);
1860 cmd
->init_task_tag
= hdr
->itt
;
1861 cmd
->targ_xfer_tag
= 0xFFFFFFFF;
1862 cmd
->cmd_sn
= be32_to_cpu(hdr
->cmdsn
);
1863 cmd
->exp_stat_sn
= be32_to_cpu(hdr
->exp_statsn
);
1864 se_tmr
= cmd
->se_cmd
.se_tmr_req
;
1865 tmr_req
= cmd
->tmr_req
;
1867 * Locate the struct se_lun for all TMRs not related to ERL=2 TASK_REASSIGN
1869 if (function
!= ISCSI_TM_FUNC_TASK_REASSIGN
) {
1870 ret
= transport_lookup_tmr_lun(&cmd
->se_cmd
,
1871 scsilun_to_int(&hdr
->lun
));
1873 se_tmr
->response
= ISCSI_TMF_RSP_NO_LUN
;
1879 case ISCSI_TM_FUNC_ABORT_TASK
:
1880 se_tmr
->response
= iscsit_tmr_abort_task(cmd
, buf
);
1881 if (se_tmr
->response
)
1884 case ISCSI_TM_FUNC_ABORT_TASK_SET
:
1885 case ISCSI_TM_FUNC_CLEAR_ACA
:
1886 case ISCSI_TM_FUNC_CLEAR_TASK_SET
:
1887 case ISCSI_TM_FUNC_LOGICAL_UNIT_RESET
:
1889 case ISCSI_TM_FUNC_TARGET_WARM_RESET
:
1890 if (iscsit_tmr_task_warm_reset(conn
, tmr_req
, buf
) < 0) {
1891 se_tmr
->response
= ISCSI_TMF_RSP_AUTH_FAILED
;
1895 case ISCSI_TM_FUNC_TARGET_COLD_RESET
:
1896 if (iscsit_tmr_task_cold_reset(conn
, tmr_req
, buf
) < 0) {
1897 se_tmr
->response
= ISCSI_TMF_RSP_AUTH_FAILED
;
1901 case ISCSI_TM_FUNC_TASK_REASSIGN
:
1902 se_tmr
->response
= iscsit_tmr_task_reassign(cmd
, buf
);
1904 * Perform sanity checks on the ExpDataSN only if the
1905 * TASK_REASSIGN was successful.
1907 if (se_tmr
->response
)
1910 if (iscsit_check_task_reassign_expdatasn(tmr_req
, conn
) < 0)
1911 return iscsit_add_reject_cmd(cmd
,
1912 ISCSI_REASON_BOOKMARK_INVALID
, buf
);
1915 pr_err("Unknown TMR function: 0x%02x, protocol"
1916 " error.\n", function
);
1917 se_tmr
->response
= ISCSI_TMF_RSP_NOT_SUPPORTED
;
1921 if ((function
!= ISCSI_TM_FUNC_TASK_REASSIGN
) &&
1922 (se_tmr
->response
== ISCSI_TMF_RSP_COMPLETE
))
1923 se_tmr
->call_transport
= 1;
1925 spin_lock_bh(&conn
->cmd_lock
);
1926 list_add_tail(&cmd
->i_conn_node
, &conn
->conn_cmd_list
);
1927 spin_unlock_bh(&conn
->cmd_lock
);
1929 if (!(hdr
->opcode
& ISCSI_OP_IMMEDIATE
)) {
1930 int cmdsn_ret
= iscsit_sequence_cmd(conn
, cmd
, buf
, hdr
->cmdsn
);
1931 if (cmdsn_ret
== CMDSN_HIGHER_THAN_EXP
)
1932 out_of_order_cmdsn
= 1;
1933 else if (cmdsn_ret
== CMDSN_LOWER_THAN_EXP
)
1935 else if (cmdsn_ret
== CMDSN_ERROR_CANNOT_RECOVER
)
1938 iscsit_ack_from_expstatsn(conn
, be32_to_cpu(hdr
->exp_statsn
));
1940 if (out_of_order_cmdsn
|| !(hdr
->opcode
& ISCSI_OP_IMMEDIATE
))
1943 * Found the referenced task, send to transport for processing.
1945 if (se_tmr
->call_transport
)
1946 return transport_generic_handle_tmr(&cmd
->se_cmd
);
1949 * Could not find the referenced LUN, task, or Task Management
1950 * command not authorized or supported. Change state and
1951 * let the tx_thread send the response.
1953 * For connection recovery, this is also the default action for
1954 * TMR TASK_REASSIGN.
1957 pr_debug("Handle TMR, using sess_ref=true check\n");
1958 target_put_sess_cmd(conn
->sess
->se_sess
, &cmd
->se_cmd
);
1961 iscsit_add_cmd_to_response_queue(cmd
, conn
, cmd
->i_state
);
1964 EXPORT_SYMBOL(iscsit_handle_task_mgt_cmd
);
1966 /* #warning FIXME: Support Text Command parameters besides SendTargets */
1968 iscsit_setup_text_cmd(struct iscsi_conn
*conn
, struct iscsi_cmd
*cmd
,
1969 struct iscsi_text
*hdr
)
1971 u32 payload_length
= ntoh24(hdr
->dlength
);
1973 if (payload_length
> conn
->conn_ops
->MaxXmitDataSegmentLength
) {
1974 pr_err("Unable to accept text parameter length: %u"
1975 "greater than MaxXmitDataSegmentLength %u.\n",
1976 payload_length
, conn
->conn_ops
->MaxXmitDataSegmentLength
);
1977 return iscsit_reject_cmd(cmd
, ISCSI_REASON_PROTOCOL_ERROR
,
1978 (unsigned char *)hdr
);
1981 if (!(hdr
->flags
& ISCSI_FLAG_CMD_FINAL
) ||
1982 (hdr
->flags
& ISCSI_FLAG_TEXT_CONTINUE
)) {
1983 pr_err("Multi sequence text commands currently not supported\n");
1984 return iscsit_reject_cmd(cmd
, ISCSI_REASON_CMD_NOT_SUPPORTED
,
1985 (unsigned char *)hdr
);
1988 pr_debug("Got Text Request: ITT: 0x%08x, CmdSN: 0x%08x,"
1989 " ExpStatSN: 0x%08x, Length: %u\n", hdr
->itt
, hdr
->cmdsn
,
1990 hdr
->exp_statsn
, payload_length
);
1992 cmd
->iscsi_opcode
= ISCSI_OP_TEXT
;
1993 cmd
->i_state
= ISTATE_SEND_TEXTRSP
;
1994 cmd
->immediate_cmd
= ((hdr
->opcode
& ISCSI_OP_IMMEDIATE
) ? 1 : 0);
1995 conn
->sess
->init_task_tag
= cmd
->init_task_tag
= hdr
->itt
;
1996 cmd
->targ_xfer_tag
= 0xFFFFFFFF;
1997 cmd
->cmd_sn
= be32_to_cpu(hdr
->cmdsn
);
1998 cmd
->exp_stat_sn
= be32_to_cpu(hdr
->exp_statsn
);
1999 cmd
->data_direction
= DMA_NONE
;
2003 EXPORT_SYMBOL(iscsit_setup_text_cmd
);
2006 iscsit_process_text_cmd(struct iscsi_conn
*conn
, struct iscsi_cmd
*cmd
,
2007 struct iscsi_text
*hdr
)
2009 unsigned char *text_in
= cmd
->text_in_ptr
, *text_ptr
;
2013 pr_err("Unable to locate text_in buffer for sendtargets"
2017 if (strncmp("SendTargets", text_in
, 11) != 0) {
2018 pr_err("Received Text Data that is not"
2019 " SendTargets, cannot continue.\n");
2022 text_ptr
= strchr(text_in
, '=');
2024 pr_err("No \"=\" separator found in Text Data,"
2025 " cannot continue.\n");
2028 if (!strncmp("=All", text_ptr
, 4)) {
2029 cmd
->cmd_flags
|= IFC_SENDTARGETS_ALL
;
2030 } else if (!strncmp("=iqn.", text_ptr
, 5) ||
2031 !strncmp("=eui.", text_ptr
, 5)) {
2032 cmd
->cmd_flags
|= IFC_SENDTARGETS_SINGLE
;
2034 pr_err("Unable to locate valid SendTargets=%s value\n", text_ptr
);
2038 spin_lock_bh(&conn
->cmd_lock
);
2039 list_add_tail(&cmd
->i_conn_node
, &conn
->conn_cmd_list
);
2040 spin_unlock_bh(&conn
->cmd_lock
);
2042 iscsit_ack_from_expstatsn(conn
, be32_to_cpu(hdr
->exp_statsn
));
2044 if (!(hdr
->opcode
& ISCSI_OP_IMMEDIATE
)) {
2045 cmdsn_ret
= iscsit_sequence_cmd(conn
, cmd
,
2046 (unsigned char *)hdr
, hdr
->cmdsn
);
2047 if (cmdsn_ret
== CMDSN_ERROR_CANNOT_RECOVER
)
2053 return iscsit_execute_cmd(cmd
, 0);
2056 return iscsit_reject_cmd(cmd
, ISCSI_REASON_PROTOCOL_ERROR
,
2057 (unsigned char *)hdr
);
2059 EXPORT_SYMBOL(iscsit_process_text_cmd
);
2062 iscsit_handle_text_cmd(struct iscsi_conn
*conn
, struct iscsi_cmd
*cmd
,
2065 struct iscsi_text
*hdr
= (struct iscsi_text
*)buf
;
2066 char *text_in
= NULL
;
2067 u32 payload_length
= ntoh24(hdr
->dlength
);
2070 rc
= iscsit_setup_text_cmd(conn
, cmd
, hdr
);
2074 rx_size
= payload_length
;
2075 if (payload_length
) {
2076 u32 checksum
= 0, data_crc
= 0;
2077 u32 padding
= 0, pad_bytes
= 0;
2078 int niov
= 0, rx_got
;
2081 text_in
= kzalloc(payload_length
, GFP_KERNEL
);
2083 pr_err("Unable to allocate memory for"
2084 " incoming text parameters\n");
2087 cmd
->text_in_ptr
= text_in
;
2089 memset(iov
, 0, 3 * sizeof(struct kvec
));
2090 iov
[niov
].iov_base
= text_in
;
2091 iov
[niov
++].iov_len
= payload_length
;
2093 padding
= ((-payload_length
) & 3);
2095 iov
[niov
].iov_base
= &pad_bytes
;
2096 iov
[niov
++].iov_len
= padding
;
2098 pr_debug("Receiving %u additional bytes"
2099 " for padding.\n", padding
);
2101 if (conn
->conn_ops
->DataDigest
) {
2102 iov
[niov
].iov_base
= &checksum
;
2103 iov
[niov
++].iov_len
= ISCSI_CRC_LEN
;
2104 rx_size
+= ISCSI_CRC_LEN
;
2107 rx_got
= rx_data(conn
, &iov
[0], niov
, rx_size
);
2108 if (rx_got
!= rx_size
)
2111 if (conn
->conn_ops
->DataDigest
) {
2112 iscsit_do_crypto_hash_buf(&conn
->conn_rx_hash
,
2113 text_in
, payload_length
,
2114 padding
, (u8
*)&pad_bytes
,
2117 if (checksum
!= data_crc
) {
2118 pr_err("Text data CRC32C DataDigest"
2119 " 0x%08x does not match computed"
2120 " 0x%08x\n", checksum
, data_crc
);
2121 if (!conn
->sess
->sess_ops
->ErrorRecoveryLevel
) {
2122 pr_err("Unable to recover from"
2123 " Text Data digest failure while in"
2128 * Silently drop this PDU and let the
2129 * initiator plug the CmdSN gap.
2131 pr_debug("Dropping Text"
2132 " Command CmdSN: 0x%08x due to"
2133 " DataCRC error.\n", hdr
->cmdsn
);
2138 pr_debug("Got CRC32C DataDigest"
2139 " 0x%08x for %u bytes of text data.\n",
2140 checksum
, payload_length
);
2143 text_in
[payload_length
- 1] = '\0';
2144 pr_debug("Successfully read %d bytes of text"
2145 " data.\n", payload_length
);
2148 return iscsit_process_text_cmd(conn
, cmd
, hdr
);
2151 kfree(cmd
->text_in_ptr
);
2152 cmd
->text_in_ptr
= NULL
;
2153 return iscsit_reject_cmd(cmd
, ISCSI_REASON_PROTOCOL_ERROR
, buf
);
2155 EXPORT_SYMBOL(iscsit_handle_text_cmd
);
2157 int iscsit_logout_closesession(struct iscsi_cmd
*cmd
, struct iscsi_conn
*conn
)
2159 struct iscsi_conn
*conn_p
;
2160 struct iscsi_session
*sess
= conn
->sess
;
2162 pr_debug("Received logout request CLOSESESSION on CID: %hu"
2163 " for SID: %u.\n", conn
->cid
, conn
->sess
->sid
);
2165 atomic_set(&sess
->session_logout
, 1);
2166 atomic_set(&conn
->conn_logout_remove
, 1);
2167 conn
->conn_logout_reason
= ISCSI_LOGOUT_REASON_CLOSE_SESSION
;
2169 iscsit_inc_conn_usage_count(conn
);
2170 iscsit_inc_session_usage_count(sess
);
2172 spin_lock_bh(&sess
->conn_lock
);
2173 list_for_each_entry(conn_p
, &sess
->sess_conn_list
, conn_list
) {
2174 if (conn_p
->conn_state
!= TARG_CONN_STATE_LOGGED_IN
)
2177 pr_debug("Moving to TARG_CONN_STATE_IN_LOGOUT.\n");
2178 conn_p
->conn_state
= TARG_CONN_STATE_IN_LOGOUT
;
2180 spin_unlock_bh(&sess
->conn_lock
);
2182 iscsit_add_cmd_to_response_queue(cmd
, conn
, cmd
->i_state
);
2187 int iscsit_logout_closeconnection(struct iscsi_cmd
*cmd
, struct iscsi_conn
*conn
)
2189 struct iscsi_conn
*l_conn
;
2190 struct iscsi_session
*sess
= conn
->sess
;
2192 pr_debug("Received logout request CLOSECONNECTION for CID:"
2193 " %hu on CID: %hu.\n", cmd
->logout_cid
, conn
->cid
);
2196 * A Logout Request with a CLOSECONNECTION reason code for a CID
2197 * can arrive on a connection with a differing CID.
2199 if (conn
->cid
== cmd
->logout_cid
) {
2200 spin_lock_bh(&conn
->state_lock
);
2201 pr_debug("Moving to TARG_CONN_STATE_IN_LOGOUT.\n");
2202 conn
->conn_state
= TARG_CONN_STATE_IN_LOGOUT
;
2204 atomic_set(&conn
->conn_logout_remove
, 1);
2205 conn
->conn_logout_reason
= ISCSI_LOGOUT_REASON_CLOSE_CONNECTION
;
2206 iscsit_inc_conn_usage_count(conn
);
2208 spin_unlock_bh(&conn
->state_lock
);
2211 * Handle all different cid CLOSECONNECTION requests in
2212 * iscsit_logout_post_handler_diffcid() as to give enough
2213 * time for any non immediate command's CmdSN to be
2214 * acknowledged on the connection in question.
2216 * Here we simply make sure the CID is still around.
2218 l_conn
= iscsit_get_conn_from_cid(sess
,
2221 cmd
->logout_response
= ISCSI_LOGOUT_CID_NOT_FOUND
;
2222 iscsit_add_cmd_to_response_queue(cmd
, conn
,
2227 iscsit_dec_conn_usage_count(l_conn
);
2230 iscsit_add_cmd_to_response_queue(cmd
, conn
, cmd
->i_state
);
2235 int iscsit_logout_removeconnforrecovery(struct iscsi_cmd
*cmd
, struct iscsi_conn
*conn
)
2237 struct iscsi_session
*sess
= conn
->sess
;
2239 pr_debug("Received explicit REMOVECONNFORRECOVERY logout for"
2240 " CID: %hu on CID: %hu.\n", cmd
->logout_cid
, conn
->cid
);
2242 if (sess
->sess_ops
->ErrorRecoveryLevel
!= 2) {
2243 pr_err("Received Logout Request REMOVECONNFORRECOVERY"
2244 " while ERL!=2.\n");
2245 cmd
->logout_response
= ISCSI_LOGOUT_RECOVERY_UNSUPPORTED
;
2246 iscsit_add_cmd_to_response_queue(cmd
, conn
, cmd
->i_state
);
2250 if (conn
->cid
== cmd
->logout_cid
) {
2251 pr_err("Received Logout Request REMOVECONNFORRECOVERY"
2252 " with CID: %hu on CID: %hu, implementation error.\n",
2253 cmd
->logout_cid
, conn
->cid
);
2254 cmd
->logout_response
= ISCSI_LOGOUT_CLEANUP_FAILED
;
2255 iscsit_add_cmd_to_response_queue(cmd
, conn
, cmd
->i_state
);
2259 iscsit_add_cmd_to_response_queue(cmd
, conn
, cmd
->i_state
);
2265 iscsit_handle_logout_cmd(struct iscsi_conn
*conn
, struct iscsi_cmd
*cmd
,
2268 int cmdsn_ret
, logout_remove
= 0;
2270 struct iscsi_logout
*hdr
;
2271 struct iscsi_tiqn
*tiqn
= iscsit_snmp_get_tiqn(conn
);
2273 hdr
= (struct iscsi_logout
*) buf
;
2274 reason_code
= (hdr
->flags
& 0x7f);
2277 spin_lock(&tiqn
->logout_stats
.lock
);
2278 if (reason_code
== ISCSI_LOGOUT_REASON_CLOSE_SESSION
)
2279 tiqn
->logout_stats
.normal_logouts
++;
2281 tiqn
->logout_stats
.abnormal_logouts
++;
2282 spin_unlock(&tiqn
->logout_stats
.lock
);
2285 pr_debug("Got Logout Request ITT: 0x%08x CmdSN: 0x%08x"
2286 " ExpStatSN: 0x%08x Reason: 0x%02x CID: %hu on CID: %hu\n",
2287 hdr
->itt
, hdr
->cmdsn
, hdr
->exp_statsn
, reason_code
,
2288 hdr
->cid
, conn
->cid
);
2290 if (conn
->conn_state
!= TARG_CONN_STATE_LOGGED_IN
) {
2291 pr_err("Received logout request on connection that"
2292 " is not in logged in state, ignoring request.\n");
2293 iscsit_free_cmd(cmd
, false);
2297 cmd
->iscsi_opcode
= ISCSI_OP_LOGOUT
;
2298 cmd
->i_state
= ISTATE_SEND_LOGOUTRSP
;
2299 cmd
->immediate_cmd
= ((hdr
->opcode
& ISCSI_OP_IMMEDIATE
) ? 1 : 0);
2300 conn
->sess
->init_task_tag
= cmd
->init_task_tag
= hdr
->itt
;
2301 cmd
->targ_xfer_tag
= 0xFFFFFFFF;
2302 cmd
->cmd_sn
= be32_to_cpu(hdr
->cmdsn
);
2303 cmd
->exp_stat_sn
= be32_to_cpu(hdr
->exp_statsn
);
2304 cmd
->logout_cid
= be16_to_cpu(hdr
->cid
);
2305 cmd
->logout_reason
= reason_code
;
2306 cmd
->data_direction
= DMA_NONE
;
2309 * We need to sleep in these cases (by returning 1) until the Logout
2310 * Response gets sent in the tx thread.
2312 if ((reason_code
== ISCSI_LOGOUT_REASON_CLOSE_SESSION
) ||
2313 ((reason_code
== ISCSI_LOGOUT_REASON_CLOSE_CONNECTION
) &&
2314 be16_to_cpu(hdr
->cid
) == conn
->cid
))
2317 spin_lock_bh(&conn
->cmd_lock
);
2318 list_add_tail(&cmd
->i_conn_node
, &conn
->conn_cmd_list
);
2319 spin_unlock_bh(&conn
->cmd_lock
);
2321 if (reason_code
!= ISCSI_LOGOUT_REASON_RECOVERY
)
2322 iscsit_ack_from_expstatsn(conn
, be32_to_cpu(hdr
->exp_statsn
));
2325 * Immediate commands are executed, well, immediately.
2326 * Non-Immediate Logout Commands are executed in CmdSN order.
2328 if (cmd
->immediate_cmd
) {
2329 int ret
= iscsit_execute_cmd(cmd
, 0);
2334 cmdsn_ret
= iscsit_sequence_cmd(conn
, cmd
, buf
, hdr
->cmdsn
);
2335 if (cmdsn_ret
== CMDSN_LOWER_THAN_EXP
)
2337 else if (cmdsn_ret
== CMDSN_ERROR_CANNOT_RECOVER
)
2341 return logout_remove
;
2343 EXPORT_SYMBOL(iscsit_handle_logout_cmd
);
2345 static int iscsit_handle_snack(
2346 struct iscsi_conn
*conn
,
2349 struct iscsi_snack
*hdr
;
2351 hdr
= (struct iscsi_snack
*) buf
;
2352 hdr
->flags
&= ~ISCSI_FLAG_CMD_FINAL
;
2354 pr_debug("Got ISCSI_INIT_SNACK, ITT: 0x%08x, ExpStatSN:"
2355 " 0x%08x, Type: 0x%02x, BegRun: 0x%08x, RunLength: 0x%08x,"
2356 " CID: %hu\n", hdr
->itt
, hdr
->exp_statsn
, hdr
->flags
,
2357 hdr
->begrun
, hdr
->runlength
, conn
->cid
);
2359 if (!conn
->sess
->sess_ops
->ErrorRecoveryLevel
) {
2360 pr_err("Initiator sent SNACK request while in"
2361 " ErrorRecoveryLevel=0.\n");
2362 return iscsit_add_reject(conn
, ISCSI_REASON_PROTOCOL_ERROR
,
2366 * SNACK_DATA and SNACK_R2T are both 0, so check which function to
2367 * call from inside iscsi_send_recovery_datain_or_r2t().
2369 switch (hdr
->flags
& ISCSI_FLAG_SNACK_TYPE_MASK
) {
2371 return iscsit_handle_recovery_datain_or_r2t(conn
, buf
,
2373 be32_to_cpu(hdr
->ttt
),
2374 be32_to_cpu(hdr
->begrun
),
2375 be32_to_cpu(hdr
->runlength
));
2376 case ISCSI_FLAG_SNACK_TYPE_STATUS
:
2377 return iscsit_handle_status_snack(conn
, hdr
->itt
,
2378 be32_to_cpu(hdr
->ttt
),
2379 be32_to_cpu(hdr
->begrun
), be32_to_cpu(hdr
->runlength
));
2380 case ISCSI_FLAG_SNACK_TYPE_DATA_ACK
:
2381 return iscsit_handle_data_ack(conn
, be32_to_cpu(hdr
->ttt
),
2382 be32_to_cpu(hdr
->begrun
),
2383 be32_to_cpu(hdr
->runlength
));
2384 case ISCSI_FLAG_SNACK_TYPE_RDATA
:
2385 /* FIXME: Support R-Data SNACK */
2386 pr_err("R-Data SNACK Not Supported.\n");
2387 return iscsit_add_reject(conn
, ISCSI_REASON_PROTOCOL_ERROR
,
2390 pr_err("Unknown SNACK type 0x%02x, protocol"
2391 " error.\n", hdr
->flags
& 0x0f);
2392 return iscsit_add_reject(conn
, ISCSI_REASON_PROTOCOL_ERROR
,
2399 static void iscsit_rx_thread_wait_for_tcp(struct iscsi_conn
*conn
)
2401 if ((conn
->sock
->sk
->sk_shutdown
& SEND_SHUTDOWN
) ||
2402 (conn
->sock
->sk
->sk_shutdown
& RCV_SHUTDOWN
)) {
2403 wait_for_completion_interruptible_timeout(
2404 &conn
->rx_half_close_comp
,
2405 ISCSI_RX_THREAD_TCP_TIMEOUT
* HZ
);
2409 static int iscsit_handle_immediate_data(
2410 struct iscsi_cmd
*cmd
,
2411 struct iscsi_scsi_req
*hdr
,
2414 int iov_ret
, rx_got
= 0, rx_size
= 0;
2415 u32 checksum
, iov_count
= 0, padding
= 0;
2416 struct iscsi_conn
*conn
= cmd
->conn
;
2419 iov_ret
= iscsit_map_iovec(cmd
, cmd
->iov_data
, cmd
->write_data_done
, length
);
2421 return IMMEDIATE_DATA_CANNOT_RECOVER
;
2424 iov_count
= iov_ret
;
2425 iov
= &cmd
->iov_data
[0];
2427 padding
= ((-length
) & 3);
2429 iov
[iov_count
].iov_base
= cmd
->pad_bytes
;
2430 iov
[iov_count
++].iov_len
= padding
;
2434 if (conn
->conn_ops
->DataDigest
) {
2435 iov
[iov_count
].iov_base
= &checksum
;
2436 iov
[iov_count
++].iov_len
= ISCSI_CRC_LEN
;
2437 rx_size
+= ISCSI_CRC_LEN
;
2440 rx_got
= rx_data(conn
, &cmd
->iov_data
[0], iov_count
, rx_size
);
2442 iscsit_unmap_iovec(cmd
);
2444 if (rx_got
!= rx_size
) {
2445 iscsit_rx_thread_wait_for_tcp(conn
);
2446 return IMMEDIATE_DATA_CANNOT_RECOVER
;
2449 if (conn
->conn_ops
->DataDigest
) {
2452 data_crc
= iscsit_do_crypto_hash_sg(&conn
->conn_rx_hash
, cmd
,
2453 cmd
->write_data_done
, length
, padding
,
2456 if (checksum
!= data_crc
) {
2457 pr_err("ImmediateData CRC32C DataDigest 0x%08x"
2458 " does not match computed 0x%08x\n", checksum
,
2461 if (!conn
->sess
->sess_ops
->ErrorRecoveryLevel
) {
2462 pr_err("Unable to recover from"
2463 " Immediate Data digest failure while"
2465 iscsit_reject_cmd(cmd
,
2466 ISCSI_REASON_DATA_DIGEST_ERROR
,
2467 (unsigned char *)hdr
);
2468 return IMMEDIATE_DATA_CANNOT_RECOVER
;
2470 iscsit_reject_cmd(cmd
,
2471 ISCSI_REASON_DATA_DIGEST_ERROR
,
2472 (unsigned char *)hdr
);
2473 return IMMEDIATE_DATA_ERL1_CRC_FAILURE
;
2476 pr_debug("Got CRC32C DataDigest 0x%08x for"
2477 " %u bytes of Immediate Data\n", checksum
,
2482 cmd
->write_data_done
+= length
;
2484 if (cmd
->write_data_done
== cmd
->se_cmd
.data_length
) {
2485 spin_lock_bh(&cmd
->istate_lock
);
2486 cmd
->cmd_flags
|= ICF_GOT_LAST_DATAOUT
;
2487 cmd
->i_state
= ISTATE_RECEIVED_LAST_DATAOUT
;
2488 spin_unlock_bh(&cmd
->istate_lock
);
2491 return IMMEDIATE_DATA_NORMAL_OPERATION
;
2495 * Called with sess->conn_lock held.
2497 /* #warning iscsi_build_conn_drop_async_message() only sends out on connections
2498 with active network interface */
2499 static void iscsit_build_conn_drop_async_message(struct iscsi_conn
*conn
)
2501 struct iscsi_cmd
*cmd
;
2502 struct iscsi_conn
*conn_p
;
2506 * Only send a Asynchronous Message on connections whos network
2507 * interface is still functional.
2509 list_for_each_entry(conn_p
, &conn
->sess
->sess_conn_list
, conn_list
) {
2510 if (conn_p
->conn_state
== TARG_CONN_STATE_LOGGED_IN
) {
2511 iscsit_inc_conn_usage_count(conn_p
);
2520 cmd
= iscsit_allocate_cmd(conn_p
, TASK_RUNNING
);
2522 iscsit_dec_conn_usage_count(conn_p
);
2526 cmd
->logout_cid
= conn
->cid
;
2527 cmd
->iscsi_opcode
= ISCSI_OP_ASYNC_EVENT
;
2528 cmd
->i_state
= ISTATE_SEND_ASYNCMSG
;
2530 spin_lock_bh(&conn_p
->cmd_lock
);
2531 list_add_tail(&cmd
->i_conn_node
, &conn_p
->conn_cmd_list
);
2532 spin_unlock_bh(&conn_p
->cmd_lock
);
2534 iscsit_add_cmd_to_response_queue(cmd
, conn_p
, cmd
->i_state
);
2535 iscsit_dec_conn_usage_count(conn_p
);
2538 static int iscsit_send_conn_drop_async_message(
2539 struct iscsi_cmd
*cmd
,
2540 struct iscsi_conn
*conn
)
2542 struct iscsi_async
*hdr
;
2544 cmd
->tx_size
= ISCSI_HDR_LEN
;
2545 cmd
->iscsi_opcode
= ISCSI_OP_ASYNC_EVENT
;
2547 hdr
= (struct iscsi_async
*) cmd
->pdu
;
2548 hdr
->opcode
= ISCSI_OP_ASYNC_EVENT
;
2549 hdr
->flags
= ISCSI_FLAG_CMD_FINAL
;
2550 cmd
->init_task_tag
= RESERVED_ITT
;
2551 cmd
->targ_xfer_tag
= 0xFFFFFFFF;
2552 put_unaligned_be64(0xFFFFFFFFFFFFFFFFULL
, &hdr
->rsvd4
[0]);
2553 cmd
->stat_sn
= conn
->stat_sn
++;
2554 hdr
->statsn
= cpu_to_be32(cmd
->stat_sn
);
2555 hdr
->exp_cmdsn
= cpu_to_be32(conn
->sess
->exp_cmd_sn
);
2556 hdr
->max_cmdsn
= cpu_to_be32(conn
->sess
->max_cmd_sn
);
2557 hdr
->async_event
= ISCSI_ASYNC_MSG_DROPPING_CONNECTION
;
2558 hdr
->param1
= cpu_to_be16(cmd
->logout_cid
);
2559 hdr
->param2
= cpu_to_be16(conn
->sess
->sess_ops
->DefaultTime2Wait
);
2560 hdr
->param3
= cpu_to_be16(conn
->sess
->sess_ops
->DefaultTime2Retain
);
2562 if (conn
->conn_ops
->HeaderDigest
) {
2563 u32
*header_digest
= (u32
*)&cmd
->pdu
[ISCSI_HDR_LEN
];
2565 iscsit_do_crypto_hash_buf(&conn
->conn_tx_hash
, hdr
,
2566 ISCSI_HDR_LEN
, 0, NULL
, (u8
*)header_digest
);
2568 cmd
->tx_size
+= ISCSI_CRC_LEN
;
2569 pr_debug("Attaching CRC32C HeaderDigest to"
2570 " Async Message 0x%08x\n", *header_digest
);
2573 cmd
->iov_misc
[0].iov_base
= cmd
->pdu
;
2574 cmd
->iov_misc
[0].iov_len
= cmd
->tx_size
;
2575 cmd
->iov_misc_count
= 1;
2577 pr_debug("Sending Connection Dropped Async Message StatSN:"
2578 " 0x%08x, for CID: %hu on CID: %hu\n", cmd
->stat_sn
,
2579 cmd
->logout_cid
, conn
->cid
);
2583 static void iscsit_tx_thread_wait_for_tcp(struct iscsi_conn
*conn
)
2585 if ((conn
->sock
->sk
->sk_shutdown
& SEND_SHUTDOWN
) ||
2586 (conn
->sock
->sk
->sk_shutdown
& RCV_SHUTDOWN
)) {
2587 wait_for_completion_interruptible_timeout(
2588 &conn
->tx_half_close_comp
,
2589 ISCSI_TX_THREAD_TCP_TIMEOUT
* HZ
);
2594 iscsit_build_datain_pdu(struct iscsi_cmd
*cmd
, struct iscsi_conn
*conn
,
2595 struct iscsi_datain
*datain
, struct iscsi_data_rsp
*hdr
,
2598 hdr
->opcode
= ISCSI_OP_SCSI_DATA_IN
;
2599 hdr
->flags
= datain
->flags
;
2600 if (hdr
->flags
& ISCSI_FLAG_DATA_STATUS
) {
2601 if (cmd
->se_cmd
.se_cmd_flags
& SCF_OVERFLOW_BIT
) {
2602 hdr
->flags
|= ISCSI_FLAG_DATA_OVERFLOW
;
2603 hdr
->residual_count
= cpu_to_be32(cmd
->se_cmd
.residual_count
);
2604 } else if (cmd
->se_cmd
.se_cmd_flags
& SCF_UNDERFLOW_BIT
) {
2605 hdr
->flags
|= ISCSI_FLAG_DATA_UNDERFLOW
;
2606 hdr
->residual_count
= cpu_to_be32(cmd
->se_cmd
.residual_count
);
2609 hton24(hdr
->dlength
, datain
->length
);
2610 if (hdr
->flags
& ISCSI_FLAG_DATA_ACK
)
2611 int_to_scsilun(cmd
->se_cmd
.orig_fe_lun
,
2612 (struct scsi_lun
*)&hdr
->lun
);
2614 put_unaligned_le64(0xFFFFFFFFFFFFFFFFULL
, &hdr
->lun
);
2616 hdr
->itt
= cmd
->init_task_tag
;
2618 if (hdr
->flags
& ISCSI_FLAG_DATA_ACK
)
2619 hdr
->ttt
= cpu_to_be32(cmd
->targ_xfer_tag
);
2621 hdr
->ttt
= cpu_to_be32(0xFFFFFFFF);
2623 hdr
->statsn
= cpu_to_be32(cmd
->stat_sn
);
2625 hdr
->statsn
= cpu_to_be32(0xFFFFFFFF);
2627 hdr
->exp_cmdsn
= cpu_to_be32(conn
->sess
->exp_cmd_sn
);
2628 hdr
->max_cmdsn
= cpu_to_be32(conn
->sess
->max_cmd_sn
);
2629 hdr
->datasn
= cpu_to_be32(datain
->data_sn
);
2630 hdr
->offset
= cpu_to_be32(datain
->offset
);
2632 pr_debug("Built DataIN ITT: 0x%08x, StatSN: 0x%08x,"
2633 " DataSN: 0x%08x, Offset: %u, Length: %u, CID: %hu\n",
2634 cmd
->init_task_tag
, ntohl(hdr
->statsn
), ntohl(hdr
->datasn
),
2635 ntohl(hdr
->offset
), datain
->length
, conn
->cid
);
2638 static int iscsit_send_datain(struct iscsi_cmd
*cmd
, struct iscsi_conn
*conn
)
2640 struct iscsi_data_rsp
*hdr
= (struct iscsi_data_rsp
*)&cmd
->pdu
[0];
2641 struct iscsi_datain datain
;
2642 struct iscsi_datain_req
*dr
;
2644 u32 iov_count
= 0, tx_size
= 0;
2645 int eodr
= 0, ret
, iov_ret
;
2646 bool set_statsn
= false;
2648 memset(&datain
, 0, sizeof(struct iscsi_datain
));
2649 dr
= iscsit_get_datain_values(cmd
, &datain
);
2651 pr_err("iscsit_get_datain_values failed for ITT: 0x%08x\n",
2652 cmd
->init_task_tag
);
2656 * Be paranoid and double check the logic for now.
2658 if ((datain
.offset
+ datain
.length
) > cmd
->se_cmd
.data_length
) {
2659 pr_err("Command ITT: 0x%08x, datain.offset: %u and"
2660 " datain.length: %u exceeds cmd->data_length: %u\n",
2661 cmd
->init_task_tag
, datain
.offset
, datain
.length
,
2662 cmd
->se_cmd
.data_length
);
2666 atomic_long_add(datain
.length
, &conn
->sess
->tx_data_octets
);
2668 * Special case for successfully execution w/ both DATAIN
2671 if ((datain
.flags
& ISCSI_FLAG_DATA_STATUS
) &&
2672 (cmd
->se_cmd
.se_cmd_flags
& SCF_TRANSPORT_TASK_SENSE
))
2673 datain
.flags
&= ~ISCSI_FLAG_DATA_STATUS
;
2675 if ((dr
->dr_complete
== DATAIN_COMPLETE_NORMAL
) ||
2676 (dr
->dr_complete
== DATAIN_COMPLETE_CONNECTION_RECOVERY
)) {
2677 iscsit_increment_maxcmdsn(cmd
, conn
->sess
);
2678 cmd
->stat_sn
= conn
->stat_sn
++;
2680 } else if (dr
->dr_complete
==
2681 DATAIN_COMPLETE_WITHIN_COMMAND_RECOVERY
)
2685 iscsit_build_datain_pdu(cmd
, conn
, &datain
, hdr
, set_statsn
);
2687 iov
= &cmd
->iov_data
[0];
2688 iov
[iov_count
].iov_base
= cmd
->pdu
;
2689 iov
[iov_count
++].iov_len
= ISCSI_HDR_LEN
;
2690 tx_size
+= ISCSI_HDR_LEN
;
2692 if (conn
->conn_ops
->HeaderDigest
) {
2693 u32
*header_digest
= (u32
*)&cmd
->pdu
[ISCSI_HDR_LEN
];
2695 iscsit_do_crypto_hash_buf(&conn
->conn_tx_hash
, cmd
->pdu
,
2696 ISCSI_HDR_LEN
, 0, NULL
, (u8
*)header_digest
);
2698 iov
[0].iov_len
+= ISCSI_CRC_LEN
;
2699 tx_size
+= ISCSI_CRC_LEN
;
2701 pr_debug("Attaching CRC32 HeaderDigest"
2702 " for DataIN PDU 0x%08x\n", *header_digest
);
2705 iov_ret
= iscsit_map_iovec(cmd
, &cmd
->iov_data
[1],
2706 datain
.offset
, datain
.length
);
2710 iov_count
+= iov_ret
;
2711 tx_size
+= datain
.length
;
2713 cmd
->padding
= ((-datain
.length
) & 3);
2715 iov
[iov_count
].iov_base
= cmd
->pad_bytes
;
2716 iov
[iov_count
++].iov_len
= cmd
->padding
;
2717 tx_size
+= cmd
->padding
;
2719 pr_debug("Attaching %u padding bytes\n",
2722 if (conn
->conn_ops
->DataDigest
) {
2723 cmd
->data_crc
= iscsit_do_crypto_hash_sg(&conn
->conn_tx_hash
, cmd
,
2724 datain
.offset
, datain
.length
, cmd
->padding
, cmd
->pad_bytes
);
2726 iov
[iov_count
].iov_base
= &cmd
->data_crc
;
2727 iov
[iov_count
++].iov_len
= ISCSI_CRC_LEN
;
2728 tx_size
+= ISCSI_CRC_LEN
;
2730 pr_debug("Attached CRC32C DataDigest %d bytes, crc"
2731 " 0x%08x\n", datain
.length
+cmd
->padding
, cmd
->data_crc
);
2734 cmd
->iov_data_count
= iov_count
;
2735 cmd
->tx_size
= tx_size
;
2737 /* sendpage is preferred but can't insert markers */
2738 if (!conn
->conn_ops
->IFMarker
)
2739 ret
= iscsit_fe_sendpage_sg(cmd
, conn
);
2741 ret
= iscsit_send_tx_data(cmd
, conn
, 0);
2743 iscsit_unmap_iovec(cmd
);
2746 iscsit_tx_thread_wait_for_tcp(conn
);
2750 if (dr
->dr_complete
) {
2751 eodr
= (cmd
->se_cmd
.se_cmd_flags
& SCF_TRANSPORT_TASK_SENSE
) ?
2753 iscsit_free_datain_req(cmd
, dr
);
2760 iscsit_build_logout_rsp(struct iscsi_cmd
*cmd
, struct iscsi_conn
*conn
,
2761 struct iscsi_logout_rsp
*hdr
)
2763 struct iscsi_conn
*logout_conn
= NULL
;
2764 struct iscsi_conn_recovery
*cr
= NULL
;
2765 struct iscsi_session
*sess
= conn
->sess
;
2767 * The actual shutting down of Sessions and/or Connections
2768 * for CLOSESESSION and CLOSECONNECTION Logout Requests
2769 * is done in scsi_logout_post_handler().
2771 switch (cmd
->logout_reason
) {
2772 case ISCSI_LOGOUT_REASON_CLOSE_SESSION
:
2773 pr_debug("iSCSI session logout successful, setting"
2774 " logout response to ISCSI_LOGOUT_SUCCESS.\n");
2775 cmd
->logout_response
= ISCSI_LOGOUT_SUCCESS
;
2777 case ISCSI_LOGOUT_REASON_CLOSE_CONNECTION
:
2778 if (cmd
->logout_response
== ISCSI_LOGOUT_CID_NOT_FOUND
)
2781 * For CLOSECONNECTION logout requests carrying
2782 * a matching logout CID -> local CID, the reference
2783 * for the local CID will have been incremented in
2784 * iscsi_logout_closeconnection().
2786 * For CLOSECONNECTION logout requests carrying
2787 * a different CID than the connection it arrived
2788 * on, the connection responding to cmd->logout_cid
2789 * is stopped in iscsit_logout_post_handler_diffcid().
2792 pr_debug("iSCSI CID: %hu logout on CID: %hu"
2793 " successful.\n", cmd
->logout_cid
, conn
->cid
);
2794 cmd
->logout_response
= ISCSI_LOGOUT_SUCCESS
;
2796 case ISCSI_LOGOUT_REASON_RECOVERY
:
2797 if ((cmd
->logout_response
== ISCSI_LOGOUT_RECOVERY_UNSUPPORTED
) ||
2798 (cmd
->logout_response
== ISCSI_LOGOUT_CLEANUP_FAILED
))
2801 * If the connection is still active from our point of view
2802 * force connection recovery to occur.
2804 logout_conn
= iscsit_get_conn_from_cid_rcfr(sess
,
2807 iscsit_connection_reinstatement_rcfr(logout_conn
);
2808 iscsit_dec_conn_usage_count(logout_conn
);
2811 cr
= iscsit_get_inactive_connection_recovery_entry(
2812 conn
->sess
, cmd
->logout_cid
);
2814 pr_err("Unable to locate CID: %hu for"
2815 " REMOVECONNFORRECOVERY Logout Request.\n",
2817 cmd
->logout_response
= ISCSI_LOGOUT_CID_NOT_FOUND
;
2821 iscsit_discard_cr_cmds_by_expstatsn(cr
, cmd
->exp_stat_sn
);
2823 pr_debug("iSCSI REMOVECONNFORRECOVERY logout"
2824 " for recovery for CID: %hu on CID: %hu successful.\n",
2825 cmd
->logout_cid
, conn
->cid
);
2826 cmd
->logout_response
= ISCSI_LOGOUT_SUCCESS
;
2829 pr_err("Unknown cmd->logout_reason: 0x%02x\n",
2830 cmd
->logout_reason
);
2834 hdr
->opcode
= ISCSI_OP_LOGOUT_RSP
;
2835 hdr
->flags
|= ISCSI_FLAG_CMD_FINAL
;
2836 hdr
->response
= cmd
->logout_response
;
2837 hdr
->itt
= cmd
->init_task_tag
;
2838 cmd
->stat_sn
= conn
->stat_sn
++;
2839 hdr
->statsn
= cpu_to_be32(cmd
->stat_sn
);
2841 iscsit_increment_maxcmdsn(cmd
, conn
->sess
);
2842 hdr
->exp_cmdsn
= cpu_to_be32(conn
->sess
->exp_cmd_sn
);
2843 hdr
->max_cmdsn
= cpu_to_be32(conn
->sess
->max_cmd_sn
);
2845 pr_debug("Built Logout Response ITT: 0x%08x StatSN:"
2846 " 0x%08x Response: 0x%02x CID: %hu on CID: %hu\n",
2847 cmd
->init_task_tag
, cmd
->stat_sn
, hdr
->response
,
2848 cmd
->logout_cid
, conn
->cid
);
2852 EXPORT_SYMBOL(iscsit_build_logout_rsp
);
2855 iscsit_send_logout(struct iscsi_cmd
*cmd
, struct iscsi_conn
*conn
)
2858 int niov
= 0, tx_size
, rc
;
2860 rc
= iscsit_build_logout_rsp(cmd
, conn
,
2861 (struct iscsi_logout_rsp
*)&cmd
->pdu
[0]);
2865 tx_size
= ISCSI_HDR_LEN
;
2866 iov
= &cmd
->iov_misc
[0];
2867 iov
[niov
].iov_base
= cmd
->pdu
;
2868 iov
[niov
++].iov_len
= ISCSI_HDR_LEN
;
2870 if (conn
->conn_ops
->HeaderDigest
) {
2871 u32
*header_digest
= (u32
*)&cmd
->pdu
[ISCSI_HDR_LEN
];
2873 iscsit_do_crypto_hash_buf(&conn
->conn_tx_hash
, &cmd
->pdu
[0],
2874 ISCSI_HDR_LEN
, 0, NULL
, (u8
*)header_digest
);
2876 iov
[0].iov_len
+= ISCSI_CRC_LEN
;
2877 tx_size
+= ISCSI_CRC_LEN
;
2878 pr_debug("Attaching CRC32C HeaderDigest to"
2879 " Logout Response 0x%08x\n", *header_digest
);
2881 cmd
->iov_misc_count
= niov
;
2882 cmd
->tx_size
= tx_size
;
2888 iscsit_build_nopin_rsp(struct iscsi_cmd
*cmd
, struct iscsi_conn
*conn
,
2889 struct iscsi_nopin
*hdr
, bool nopout_response
)
2891 hdr
->opcode
= ISCSI_OP_NOOP_IN
;
2892 hdr
->flags
|= ISCSI_FLAG_CMD_FINAL
;
2893 hton24(hdr
->dlength
, cmd
->buf_ptr_size
);
2894 if (nopout_response
)
2895 put_unaligned_le64(0xFFFFFFFFFFFFFFFFULL
, &hdr
->lun
);
2896 hdr
->itt
= cmd
->init_task_tag
;
2897 hdr
->ttt
= cpu_to_be32(cmd
->targ_xfer_tag
);
2898 cmd
->stat_sn
= (nopout_response
) ? conn
->stat_sn
++ :
2900 hdr
->statsn
= cpu_to_be32(cmd
->stat_sn
);
2902 if (nopout_response
)
2903 iscsit_increment_maxcmdsn(cmd
, conn
->sess
);
2905 hdr
->exp_cmdsn
= cpu_to_be32(conn
->sess
->exp_cmd_sn
);
2906 hdr
->max_cmdsn
= cpu_to_be32(conn
->sess
->max_cmd_sn
);
2908 pr_debug("Built NOPIN %s Response ITT: 0x%08x, TTT: 0x%08x,"
2909 " StatSN: 0x%08x, Length %u\n", (nopout_response
) ?
2910 "Solicitied" : "Unsolicitied", cmd
->init_task_tag
,
2911 cmd
->targ_xfer_tag
, cmd
->stat_sn
, cmd
->buf_ptr_size
);
2913 EXPORT_SYMBOL(iscsit_build_nopin_rsp
);
2916 * Unsolicited NOPIN, either requesting a response or not.
2918 static int iscsit_send_unsolicited_nopin(
2919 struct iscsi_cmd
*cmd
,
2920 struct iscsi_conn
*conn
,
2923 struct iscsi_nopin
*hdr
= (struct iscsi_nopin
*)&cmd
->pdu
[0];
2924 int tx_size
= ISCSI_HDR_LEN
, ret
;
2926 iscsit_build_nopin_rsp(cmd
, conn
, hdr
, false);
2928 if (conn
->conn_ops
->HeaderDigest
) {
2929 u32
*header_digest
= (u32
*)&cmd
->pdu
[ISCSI_HDR_LEN
];
2931 iscsit_do_crypto_hash_buf(&conn
->conn_tx_hash
, hdr
,
2932 ISCSI_HDR_LEN
, 0, NULL
, (u8
*)header_digest
);
2934 tx_size
+= ISCSI_CRC_LEN
;
2935 pr_debug("Attaching CRC32C HeaderDigest to"
2936 " NopIN 0x%08x\n", *header_digest
);
2939 cmd
->iov_misc
[0].iov_base
= cmd
->pdu
;
2940 cmd
->iov_misc
[0].iov_len
= tx_size
;
2941 cmd
->iov_misc_count
= 1;
2942 cmd
->tx_size
= tx_size
;
2944 pr_debug("Sending Unsolicited NOPIN TTT: 0x%08x StatSN:"
2945 " 0x%08x CID: %hu\n", hdr
->ttt
, cmd
->stat_sn
, conn
->cid
);
2947 ret
= iscsit_send_tx_data(cmd
, conn
, 1);
2949 iscsit_tx_thread_wait_for_tcp(conn
);
2953 spin_lock_bh(&cmd
->istate_lock
);
2954 cmd
->i_state
= want_response
?
2955 ISTATE_SENT_NOPIN_WANT_RESPONSE
: ISTATE_SENT_STATUS
;
2956 spin_unlock_bh(&cmd
->istate_lock
);
2962 iscsit_send_nopin(struct iscsi_cmd
*cmd
, struct iscsi_conn
*conn
)
2964 struct iscsi_nopin
*hdr
= (struct iscsi_nopin
*)&cmd
->pdu
[0];
2967 int niov
= 0, tx_size
;
2969 iscsit_build_nopin_rsp(cmd
, conn
, hdr
, true);
2971 tx_size
= ISCSI_HDR_LEN
;
2972 iov
= &cmd
->iov_misc
[0];
2973 iov
[niov
].iov_base
= cmd
->pdu
;
2974 iov
[niov
++].iov_len
= ISCSI_HDR_LEN
;
2976 if (conn
->conn_ops
->HeaderDigest
) {
2977 u32
*header_digest
= (u32
*)&cmd
->pdu
[ISCSI_HDR_LEN
];
2979 iscsit_do_crypto_hash_buf(&conn
->conn_tx_hash
, hdr
,
2980 ISCSI_HDR_LEN
, 0, NULL
, (u8
*)header_digest
);
2982 iov
[0].iov_len
+= ISCSI_CRC_LEN
;
2983 tx_size
+= ISCSI_CRC_LEN
;
2984 pr_debug("Attaching CRC32C HeaderDigest"
2985 " to NopIn 0x%08x\n", *header_digest
);
2989 * NOPOUT Ping Data is attached to struct iscsi_cmd->buf_ptr.
2990 * NOPOUT DataSegmentLength is at struct iscsi_cmd->buf_ptr_size.
2992 if (cmd
->buf_ptr_size
) {
2993 iov
[niov
].iov_base
= cmd
->buf_ptr
;
2994 iov
[niov
++].iov_len
= cmd
->buf_ptr_size
;
2995 tx_size
+= cmd
->buf_ptr_size
;
2997 pr_debug("Echoing back %u bytes of ping"
2998 " data.\n", cmd
->buf_ptr_size
);
3000 padding
= ((-cmd
->buf_ptr_size
) & 3);
3002 iov
[niov
].iov_base
= &cmd
->pad_bytes
;
3003 iov
[niov
++].iov_len
= padding
;
3005 pr_debug("Attaching %u additional"
3006 " padding bytes.\n", padding
);
3008 if (conn
->conn_ops
->DataDigest
) {
3009 iscsit_do_crypto_hash_buf(&conn
->conn_tx_hash
,
3010 cmd
->buf_ptr
, cmd
->buf_ptr_size
,
3011 padding
, (u8
*)&cmd
->pad_bytes
,
3012 (u8
*)&cmd
->data_crc
);
3014 iov
[niov
].iov_base
= &cmd
->data_crc
;
3015 iov
[niov
++].iov_len
= ISCSI_CRC_LEN
;
3016 tx_size
+= ISCSI_CRC_LEN
;
3017 pr_debug("Attached DataDigest for %u"
3018 " bytes of ping data, CRC 0x%08x\n",
3019 cmd
->buf_ptr_size
, cmd
->data_crc
);
3023 cmd
->iov_misc_count
= niov
;
3024 cmd
->tx_size
= tx_size
;
3029 static int iscsit_send_r2t(
3030 struct iscsi_cmd
*cmd
,
3031 struct iscsi_conn
*conn
)
3034 struct iscsi_r2t
*r2t
;
3035 struct iscsi_r2t_rsp
*hdr
;
3038 r2t
= iscsit_get_r2t_from_list(cmd
);
3042 hdr
= (struct iscsi_r2t_rsp
*) cmd
->pdu
;
3043 memset(hdr
, 0, ISCSI_HDR_LEN
);
3044 hdr
->opcode
= ISCSI_OP_R2T
;
3045 hdr
->flags
|= ISCSI_FLAG_CMD_FINAL
;
3046 int_to_scsilun(cmd
->se_cmd
.orig_fe_lun
,
3047 (struct scsi_lun
*)&hdr
->lun
);
3048 hdr
->itt
= cmd
->init_task_tag
;
3049 spin_lock_bh(&conn
->sess
->ttt_lock
);
3050 r2t
->targ_xfer_tag
= conn
->sess
->targ_xfer_tag
++;
3051 if (r2t
->targ_xfer_tag
== 0xFFFFFFFF)
3052 r2t
->targ_xfer_tag
= conn
->sess
->targ_xfer_tag
++;
3053 spin_unlock_bh(&conn
->sess
->ttt_lock
);
3054 hdr
->ttt
= cpu_to_be32(r2t
->targ_xfer_tag
);
3055 hdr
->statsn
= cpu_to_be32(conn
->stat_sn
);
3056 hdr
->exp_cmdsn
= cpu_to_be32(conn
->sess
->exp_cmd_sn
);
3057 hdr
->max_cmdsn
= cpu_to_be32(conn
->sess
->max_cmd_sn
);
3058 hdr
->r2tsn
= cpu_to_be32(r2t
->r2t_sn
);
3059 hdr
->data_offset
= cpu_to_be32(r2t
->offset
);
3060 hdr
->data_length
= cpu_to_be32(r2t
->xfer_len
);
3062 cmd
->iov_misc
[0].iov_base
= cmd
->pdu
;
3063 cmd
->iov_misc
[0].iov_len
= ISCSI_HDR_LEN
;
3064 tx_size
+= ISCSI_HDR_LEN
;
3066 if (conn
->conn_ops
->HeaderDigest
) {
3067 u32
*header_digest
= (u32
*)&cmd
->pdu
[ISCSI_HDR_LEN
];
3069 iscsit_do_crypto_hash_buf(&conn
->conn_tx_hash
, hdr
,
3070 ISCSI_HDR_LEN
, 0, NULL
, (u8
*)header_digest
);
3072 cmd
->iov_misc
[0].iov_len
+= ISCSI_CRC_LEN
;
3073 tx_size
+= ISCSI_CRC_LEN
;
3074 pr_debug("Attaching CRC32 HeaderDigest for R2T"
3075 " PDU 0x%08x\n", *header_digest
);
3078 pr_debug("Built %sR2T, ITT: 0x%08x, TTT: 0x%08x, StatSN:"
3079 " 0x%08x, R2TSN: 0x%08x, Offset: %u, DDTL: %u, CID: %hu\n",
3080 (!r2t
->recovery_r2t
) ? "" : "Recovery ", cmd
->init_task_tag
,
3081 r2t
->targ_xfer_tag
, ntohl(hdr
->statsn
), r2t
->r2t_sn
,
3082 r2t
->offset
, r2t
->xfer_len
, conn
->cid
);
3084 cmd
->iov_misc_count
= 1;
3085 cmd
->tx_size
= tx_size
;
3087 spin_lock_bh(&cmd
->r2t_lock
);
3089 spin_unlock_bh(&cmd
->r2t_lock
);
3091 ret
= iscsit_send_tx_data(cmd
, conn
, 1);
3093 iscsit_tx_thread_wait_for_tcp(conn
);
3097 spin_lock_bh(&cmd
->dataout_timeout_lock
);
3098 iscsit_start_dataout_timer(cmd
, conn
);
3099 spin_unlock_bh(&cmd
->dataout_timeout_lock
);
3105 * @recovery: If called from iscsi_task_reassign_complete_write() for
3106 * connection recovery.
3108 int iscsit_build_r2ts_for_cmd(
3109 struct iscsi_conn
*conn
,
3110 struct iscsi_cmd
*cmd
,
3114 u32 offset
= 0, xfer_len
= 0;
3116 spin_lock_bh(&cmd
->r2t_lock
);
3117 if (cmd
->cmd_flags
& ICF_SENT_LAST_R2T
) {
3118 spin_unlock_bh(&cmd
->r2t_lock
);
3122 if (conn
->sess
->sess_ops
->DataSequenceInOrder
&&
3124 cmd
->r2t_offset
= max(cmd
->r2t_offset
, cmd
->write_data_done
);
3126 while (cmd
->outstanding_r2ts
< conn
->sess
->sess_ops
->MaxOutstandingR2T
) {
3127 if (conn
->sess
->sess_ops
->DataSequenceInOrder
) {
3128 offset
= cmd
->r2t_offset
;
3130 if (first_r2t
&& recovery
) {
3131 int new_data_end
= offset
+
3132 conn
->sess
->sess_ops
->MaxBurstLength
-
3133 cmd
->next_burst_len
;
3135 if (new_data_end
> cmd
->se_cmd
.data_length
)
3136 xfer_len
= cmd
->se_cmd
.data_length
- offset
;
3139 conn
->sess
->sess_ops
->MaxBurstLength
-
3140 cmd
->next_burst_len
;
3142 int new_data_end
= offset
+
3143 conn
->sess
->sess_ops
->MaxBurstLength
;
3145 if (new_data_end
> cmd
->se_cmd
.data_length
)
3146 xfer_len
= cmd
->se_cmd
.data_length
- offset
;
3148 xfer_len
= conn
->sess
->sess_ops
->MaxBurstLength
;
3150 cmd
->r2t_offset
+= xfer_len
;
3152 if (cmd
->r2t_offset
== cmd
->se_cmd
.data_length
)
3153 cmd
->cmd_flags
|= ICF_SENT_LAST_R2T
;
3155 struct iscsi_seq
*seq
;
3157 seq
= iscsit_get_seq_holder_for_r2t(cmd
);
3159 spin_unlock_bh(&cmd
->r2t_lock
);
3163 offset
= seq
->offset
;
3164 xfer_len
= seq
->xfer_len
;
3166 if (cmd
->seq_send_order
== cmd
->seq_count
)
3167 cmd
->cmd_flags
|= ICF_SENT_LAST_R2T
;
3169 cmd
->outstanding_r2ts
++;
3172 if (iscsit_add_r2t_to_list(cmd
, offset
, xfer_len
, 0, 0) < 0) {
3173 spin_unlock_bh(&cmd
->r2t_lock
);
3177 if (cmd
->cmd_flags
& ICF_SENT_LAST_R2T
)
3180 spin_unlock_bh(&cmd
->r2t_lock
);
3185 void iscsit_build_rsp_pdu(struct iscsi_cmd
*cmd
, struct iscsi_conn
*conn
,
3186 bool inc_stat_sn
, struct iscsi_scsi_rsp
*hdr
)
3189 cmd
->stat_sn
= conn
->stat_sn
++;
3191 atomic_long_inc(&conn
->sess
->rsp_pdus
);
3193 memset(hdr
, 0, ISCSI_HDR_LEN
);
3194 hdr
->opcode
= ISCSI_OP_SCSI_CMD_RSP
;
3195 hdr
->flags
|= ISCSI_FLAG_CMD_FINAL
;
3196 if (cmd
->se_cmd
.se_cmd_flags
& SCF_OVERFLOW_BIT
) {
3197 hdr
->flags
|= ISCSI_FLAG_CMD_OVERFLOW
;
3198 hdr
->residual_count
= cpu_to_be32(cmd
->se_cmd
.residual_count
);
3199 } else if (cmd
->se_cmd
.se_cmd_flags
& SCF_UNDERFLOW_BIT
) {
3200 hdr
->flags
|= ISCSI_FLAG_CMD_UNDERFLOW
;
3201 hdr
->residual_count
= cpu_to_be32(cmd
->se_cmd
.residual_count
);
3203 hdr
->response
= cmd
->iscsi_response
;
3204 hdr
->cmd_status
= cmd
->se_cmd
.scsi_status
;
3205 hdr
->itt
= cmd
->init_task_tag
;
3206 hdr
->statsn
= cpu_to_be32(cmd
->stat_sn
);
3208 iscsit_increment_maxcmdsn(cmd
, conn
->sess
);
3209 hdr
->exp_cmdsn
= cpu_to_be32(conn
->sess
->exp_cmd_sn
);
3210 hdr
->max_cmdsn
= cpu_to_be32(conn
->sess
->max_cmd_sn
);
3212 pr_debug("Built SCSI Response, ITT: 0x%08x, StatSN: 0x%08x,"
3213 " Response: 0x%02x, SAM Status: 0x%02x, CID: %hu\n",
3214 cmd
->init_task_tag
, cmd
->stat_sn
, cmd
->se_cmd
.scsi_status
,
3215 cmd
->se_cmd
.scsi_status
, conn
->cid
);
3217 EXPORT_SYMBOL(iscsit_build_rsp_pdu
);
3219 static int iscsit_send_response(struct iscsi_cmd
*cmd
, struct iscsi_conn
*conn
)
3221 struct iscsi_scsi_rsp
*hdr
= (struct iscsi_scsi_rsp
*)&cmd
->pdu
[0];
3223 u32 padding
= 0, tx_size
= 0;
3225 bool inc_stat_sn
= (cmd
->i_state
== ISTATE_SEND_STATUS
);
3227 iscsit_build_rsp_pdu(cmd
, conn
, inc_stat_sn
, hdr
);
3229 iov
= &cmd
->iov_misc
[0];
3230 iov
[iov_count
].iov_base
= cmd
->pdu
;
3231 iov
[iov_count
++].iov_len
= ISCSI_HDR_LEN
;
3232 tx_size
+= ISCSI_HDR_LEN
;
3235 * Attach SENSE DATA payload to iSCSI Response PDU
3237 if (cmd
->se_cmd
.sense_buffer
&&
3238 ((cmd
->se_cmd
.se_cmd_flags
& SCF_TRANSPORT_TASK_SENSE
) ||
3239 (cmd
->se_cmd
.se_cmd_flags
& SCF_EMULATED_TASK_SENSE
))) {
3240 put_unaligned_be16(cmd
->se_cmd
.scsi_sense_length
, cmd
->sense_buffer
);
3241 cmd
->se_cmd
.scsi_sense_length
+= sizeof (__be16
);
3243 padding
= -(cmd
->se_cmd
.scsi_sense_length
) & 3;
3244 hton24(hdr
->dlength
, (u32
)cmd
->se_cmd
.scsi_sense_length
);
3245 iov
[iov_count
].iov_base
= cmd
->sense_buffer
;
3246 iov
[iov_count
++].iov_len
=
3247 (cmd
->se_cmd
.scsi_sense_length
+ padding
);
3248 tx_size
+= cmd
->se_cmd
.scsi_sense_length
;
3251 memset(cmd
->sense_buffer
+
3252 cmd
->se_cmd
.scsi_sense_length
, 0, padding
);
3254 pr_debug("Adding %u bytes of padding to"
3255 " SENSE.\n", padding
);
3258 if (conn
->conn_ops
->DataDigest
) {
3259 iscsit_do_crypto_hash_buf(&conn
->conn_tx_hash
,
3261 (cmd
->se_cmd
.scsi_sense_length
+ padding
),
3262 0, NULL
, (u8
*)&cmd
->data_crc
);
3264 iov
[iov_count
].iov_base
= &cmd
->data_crc
;
3265 iov
[iov_count
++].iov_len
= ISCSI_CRC_LEN
;
3266 tx_size
+= ISCSI_CRC_LEN
;
3268 pr_debug("Attaching CRC32 DataDigest for"
3269 " SENSE, %u bytes CRC 0x%08x\n",
3270 (cmd
->se_cmd
.scsi_sense_length
+ padding
),
3274 pr_debug("Attaching SENSE DATA: %u bytes to iSCSI"
3276 cmd
->se_cmd
.scsi_sense_length
);
3279 if (conn
->conn_ops
->HeaderDigest
) {
3280 u32
*header_digest
= (u32
*)&cmd
->pdu
[ISCSI_HDR_LEN
];
3282 iscsit_do_crypto_hash_buf(&conn
->conn_tx_hash
, cmd
->pdu
,
3283 ISCSI_HDR_LEN
, 0, NULL
, (u8
*)header_digest
);
3285 iov
[0].iov_len
+= ISCSI_CRC_LEN
;
3286 tx_size
+= ISCSI_CRC_LEN
;
3287 pr_debug("Attaching CRC32 HeaderDigest for Response"
3288 " PDU 0x%08x\n", *header_digest
);
3291 cmd
->iov_misc_count
= iov_count
;
3292 cmd
->tx_size
= tx_size
;
3297 static u8
iscsit_convert_tcm_tmr_rsp(struct se_tmr_req
*se_tmr
)
3299 switch (se_tmr
->response
) {
3300 case TMR_FUNCTION_COMPLETE
:
3301 return ISCSI_TMF_RSP_COMPLETE
;
3302 case TMR_TASK_DOES_NOT_EXIST
:
3303 return ISCSI_TMF_RSP_NO_TASK
;
3304 case TMR_LUN_DOES_NOT_EXIST
:
3305 return ISCSI_TMF_RSP_NO_LUN
;
3306 case TMR_TASK_MGMT_FUNCTION_NOT_SUPPORTED
:
3307 return ISCSI_TMF_RSP_NOT_SUPPORTED
;
3308 case TMR_FUNCTION_REJECTED
:
3310 return ISCSI_TMF_RSP_REJECTED
;
3315 iscsit_build_task_mgt_rsp(struct iscsi_cmd
*cmd
, struct iscsi_conn
*conn
,
3316 struct iscsi_tm_rsp
*hdr
)
3318 struct se_tmr_req
*se_tmr
= cmd
->se_cmd
.se_tmr_req
;
3320 hdr
->opcode
= ISCSI_OP_SCSI_TMFUNC_RSP
;
3321 hdr
->flags
= ISCSI_FLAG_CMD_FINAL
;
3322 hdr
->response
= iscsit_convert_tcm_tmr_rsp(se_tmr
);
3323 hdr
->itt
= cmd
->init_task_tag
;
3324 cmd
->stat_sn
= conn
->stat_sn
++;
3325 hdr
->statsn
= cpu_to_be32(cmd
->stat_sn
);
3327 iscsit_increment_maxcmdsn(cmd
, conn
->sess
);
3328 hdr
->exp_cmdsn
= cpu_to_be32(conn
->sess
->exp_cmd_sn
);
3329 hdr
->max_cmdsn
= cpu_to_be32(conn
->sess
->max_cmd_sn
);
3331 pr_debug("Built Task Management Response ITT: 0x%08x,"
3332 " StatSN: 0x%08x, Response: 0x%02x, CID: %hu\n",
3333 cmd
->init_task_tag
, cmd
->stat_sn
, hdr
->response
, conn
->cid
);
3335 EXPORT_SYMBOL(iscsit_build_task_mgt_rsp
);
3338 iscsit_send_task_mgt_rsp(struct iscsi_cmd
*cmd
, struct iscsi_conn
*conn
)
3340 struct iscsi_tm_rsp
*hdr
= (struct iscsi_tm_rsp
*)&cmd
->pdu
[0];
3343 iscsit_build_task_mgt_rsp(cmd
, conn
, hdr
);
3345 cmd
->iov_misc
[0].iov_base
= cmd
->pdu
;
3346 cmd
->iov_misc
[0].iov_len
= ISCSI_HDR_LEN
;
3347 tx_size
+= ISCSI_HDR_LEN
;
3349 if (conn
->conn_ops
->HeaderDigest
) {
3350 u32
*header_digest
= (u32
*)&cmd
->pdu
[ISCSI_HDR_LEN
];
3352 iscsit_do_crypto_hash_buf(&conn
->conn_tx_hash
, hdr
,
3353 ISCSI_HDR_LEN
, 0, NULL
, (u8
*)header_digest
);
3355 cmd
->iov_misc
[0].iov_len
+= ISCSI_CRC_LEN
;
3356 tx_size
+= ISCSI_CRC_LEN
;
3357 pr_debug("Attaching CRC32 HeaderDigest for Task"
3358 " Mgmt Response PDU 0x%08x\n", *header_digest
);
3361 cmd
->iov_misc_count
= 1;
3362 cmd
->tx_size
= tx_size
;
3367 static bool iscsit_check_inaddr_any(struct iscsi_np
*np
)
3371 if (np
->np_sockaddr
.ss_family
== AF_INET6
) {
3372 const struct sockaddr_in6 sin6
= {
3373 .sin6_addr
= IN6ADDR_ANY_INIT
};
3374 struct sockaddr_in6
*sock_in6
=
3375 (struct sockaddr_in6
*)&np
->np_sockaddr
;
3377 if (!memcmp(sock_in6
->sin6_addr
.s6_addr
,
3378 sin6
.sin6_addr
.s6_addr
, 16))
3381 struct sockaddr_in
* sock_in
=
3382 (struct sockaddr_in
*)&np
->np_sockaddr
;
3384 if (sock_in
->sin_addr
.s_addr
== htonl(INADDR_ANY
))
3391 #define SENDTARGETS_BUF_LIMIT 32768U
3394 iscsit_build_sendtargets_response(struct iscsi_cmd
*cmd
,
3395 enum iscsit_transport_type network_transport
)
3397 char *payload
= NULL
;
3398 struct iscsi_conn
*conn
= cmd
->conn
;
3399 struct iscsi_portal_group
*tpg
;
3400 struct iscsi_tiqn
*tiqn
;
3401 struct iscsi_tpg_np
*tpg_np
;
3402 int buffer_len
, end_of_buf
= 0, len
= 0, payload_len
= 0;
3403 int target_name_printed
;
3404 unsigned char buf
[ISCSI_IQN_LEN
+12]; /* iqn + "TargetName=" + \0 */
3405 unsigned char *text_in
= cmd
->text_in_ptr
, *text_ptr
= NULL
;
3407 buffer_len
= max(conn
->conn_ops
->MaxRecvDataSegmentLength
,
3408 SENDTARGETS_BUF_LIMIT
);
3410 payload
= kzalloc(buffer_len
, GFP_KERNEL
);
3412 pr_err("Unable to allocate memory for sendtargets"
3417 * Locate pointer to iqn./eui. string for IFC_SENDTARGETS_SINGLE
3420 if (cmd
->cmd_flags
& IFC_SENDTARGETS_SINGLE
) {
3421 text_ptr
= strchr(text_in
, '=');
3423 pr_err("Unable to locate '=' string in text_in:"
3429 * Skip over '=' character..
3434 spin_lock(&tiqn_lock
);
3435 list_for_each_entry(tiqn
, &g_tiqn_list
, tiqn_list
) {
3436 if ((cmd
->cmd_flags
& IFC_SENDTARGETS_SINGLE
) &&
3437 strcmp(tiqn
->tiqn
, text_ptr
)) {
3441 target_name_printed
= 0;
3443 spin_lock(&tiqn
->tiqn_tpg_lock
);
3444 list_for_each_entry(tpg
, &tiqn
->tiqn_tpg_list
, tpg_list
) {
3446 /* If demo_mode_discovery=0 and generate_node_acls=0
3447 * (demo mode dislabed) do not return
3448 * TargetName+TargetAddress unless a NodeACL exists.
3451 if ((tpg
->tpg_attrib
.generate_node_acls
== 0) &&
3452 (tpg
->tpg_attrib
.demo_mode_discovery
== 0) &&
3453 (!core_tpg_get_initiator_node_acl(&tpg
->tpg_se_tpg
,
3454 cmd
->conn
->sess
->sess_ops
->InitiatorName
))) {
3458 spin_lock(&tpg
->tpg_state_lock
);
3459 if ((tpg
->tpg_state
== TPG_STATE_FREE
) ||
3460 (tpg
->tpg_state
== TPG_STATE_INACTIVE
)) {
3461 spin_unlock(&tpg
->tpg_state_lock
);
3464 spin_unlock(&tpg
->tpg_state_lock
);
3466 spin_lock(&tpg
->tpg_np_lock
);
3467 list_for_each_entry(tpg_np
, &tpg
->tpg_gnp_list
,
3469 struct iscsi_np
*np
= tpg_np
->tpg_np
;
3470 bool inaddr_any
= iscsit_check_inaddr_any(np
);
3472 if (np
->np_network_transport
!= network_transport
)
3475 if (!target_name_printed
) {
3476 len
= sprintf(buf
, "TargetName=%s",
3480 if ((len
+ payload_len
) > buffer_len
) {
3481 spin_unlock(&tpg
->tpg_np_lock
);
3482 spin_unlock(&tiqn
->tiqn_tpg_lock
);
3486 memcpy(payload
+ payload_len
, buf
, len
);
3488 target_name_printed
= 1;
3491 len
= sprintf(buf
, "TargetAddress="
3493 inaddr_any
? conn
->local_ip
: np
->np_ip
,
3494 inaddr_any
? conn
->local_port
: np
->np_port
,
3498 if ((len
+ payload_len
) > buffer_len
) {
3499 spin_unlock(&tpg
->tpg_np_lock
);
3500 spin_unlock(&tiqn
->tiqn_tpg_lock
);
3504 memcpy(payload
+ payload_len
, buf
, len
);
3507 spin_unlock(&tpg
->tpg_np_lock
);
3509 spin_unlock(&tiqn
->tiqn_tpg_lock
);
3514 if (cmd
->cmd_flags
& IFC_SENDTARGETS_SINGLE
)
3517 spin_unlock(&tiqn_lock
);
3519 cmd
->buf_ptr
= payload
;
3525 iscsit_build_text_rsp(struct iscsi_cmd
*cmd
, struct iscsi_conn
*conn
,
3526 struct iscsi_text_rsp
*hdr
,
3527 enum iscsit_transport_type network_transport
)
3529 int text_length
, padding
;
3531 text_length
= iscsit_build_sendtargets_response(cmd
, network_transport
);
3532 if (text_length
< 0)
3535 hdr
->opcode
= ISCSI_OP_TEXT_RSP
;
3536 hdr
->flags
|= ISCSI_FLAG_CMD_FINAL
;
3537 padding
= ((-text_length
) & 3);
3538 hton24(hdr
->dlength
, text_length
);
3539 hdr
->itt
= cmd
->init_task_tag
;
3540 hdr
->ttt
= cpu_to_be32(cmd
->targ_xfer_tag
);
3541 cmd
->stat_sn
= conn
->stat_sn
++;
3542 hdr
->statsn
= cpu_to_be32(cmd
->stat_sn
);
3544 iscsit_increment_maxcmdsn(cmd
, conn
->sess
);
3545 hdr
->exp_cmdsn
= cpu_to_be32(conn
->sess
->exp_cmd_sn
);
3546 hdr
->max_cmdsn
= cpu_to_be32(conn
->sess
->max_cmd_sn
);
3548 pr_debug("Built Text Response: ITT: 0x%08x, StatSN: 0x%08x,"
3549 " Length: %u, CID: %hu\n", cmd
->init_task_tag
, cmd
->stat_sn
,
3550 text_length
, conn
->cid
);
3552 return text_length
+ padding
;
3554 EXPORT_SYMBOL(iscsit_build_text_rsp
);
3557 * FIXME: Add support for F_BIT and C_BIT when the length is longer than
3558 * MaxRecvDataSegmentLength.
3560 static int iscsit_send_text_rsp(
3561 struct iscsi_cmd
*cmd
,
3562 struct iscsi_conn
*conn
)
3564 struct iscsi_text_rsp
*hdr
= (struct iscsi_text_rsp
*)cmd
->pdu
;
3567 int text_length
, iov_count
= 0, rc
;
3569 rc
= iscsit_build_text_rsp(cmd
, conn
, hdr
, ISCSI_TCP
);
3574 iov
= &cmd
->iov_misc
[0];
3575 iov
[iov_count
].iov_base
= cmd
->pdu
;
3576 iov
[iov_count
++].iov_len
= ISCSI_HDR_LEN
;
3577 iov
[iov_count
].iov_base
= cmd
->buf_ptr
;
3578 iov
[iov_count
++].iov_len
= text_length
;
3580 tx_size
+= (ISCSI_HDR_LEN
+ text_length
);
3582 if (conn
->conn_ops
->HeaderDigest
) {
3583 u32
*header_digest
= (u32
*)&cmd
->pdu
[ISCSI_HDR_LEN
];
3585 iscsit_do_crypto_hash_buf(&conn
->conn_tx_hash
, hdr
,
3586 ISCSI_HDR_LEN
, 0, NULL
, (u8
*)header_digest
);
3588 iov
[0].iov_len
+= ISCSI_CRC_LEN
;
3589 tx_size
+= ISCSI_CRC_LEN
;
3590 pr_debug("Attaching CRC32 HeaderDigest for"
3591 " Text Response PDU 0x%08x\n", *header_digest
);
3594 if (conn
->conn_ops
->DataDigest
) {
3595 iscsit_do_crypto_hash_buf(&conn
->conn_tx_hash
,
3596 cmd
->buf_ptr
, text_length
,
3597 0, NULL
, (u8
*)&cmd
->data_crc
);
3599 iov
[iov_count
].iov_base
= &cmd
->data_crc
;
3600 iov
[iov_count
++].iov_len
= ISCSI_CRC_LEN
;
3601 tx_size
+= ISCSI_CRC_LEN
;
3603 pr_debug("Attaching DataDigest for %u bytes of text"
3604 " data, CRC 0x%08x\n", text_length
,
3608 cmd
->iov_misc_count
= iov_count
;
3609 cmd
->tx_size
= tx_size
;
3615 iscsit_build_reject(struct iscsi_cmd
*cmd
, struct iscsi_conn
*conn
,
3616 struct iscsi_reject
*hdr
)
3618 hdr
->opcode
= ISCSI_OP_REJECT
;
3619 hdr
->reason
= cmd
->reject_reason
;
3620 hdr
->flags
|= ISCSI_FLAG_CMD_FINAL
;
3621 hton24(hdr
->dlength
, ISCSI_HDR_LEN
);
3622 hdr
->ffffffff
= cpu_to_be32(0xffffffff);
3623 cmd
->stat_sn
= conn
->stat_sn
++;
3624 hdr
->statsn
= cpu_to_be32(cmd
->stat_sn
);
3625 hdr
->exp_cmdsn
= cpu_to_be32(conn
->sess
->exp_cmd_sn
);
3626 hdr
->max_cmdsn
= cpu_to_be32(conn
->sess
->max_cmd_sn
);
3629 EXPORT_SYMBOL(iscsit_build_reject
);
3631 static int iscsit_send_reject(
3632 struct iscsi_cmd
*cmd
,
3633 struct iscsi_conn
*conn
)
3635 struct iscsi_reject
*hdr
= (struct iscsi_reject
*)&cmd
->pdu
[0];
3637 u32 iov_count
= 0, tx_size
;
3639 iscsit_build_reject(cmd
, conn
, hdr
);
3641 iov
= &cmd
->iov_misc
[0];
3642 iov
[iov_count
].iov_base
= cmd
->pdu
;
3643 iov
[iov_count
++].iov_len
= ISCSI_HDR_LEN
;
3644 iov
[iov_count
].iov_base
= cmd
->buf_ptr
;
3645 iov
[iov_count
++].iov_len
= ISCSI_HDR_LEN
;
3647 tx_size
= (ISCSI_HDR_LEN
+ ISCSI_HDR_LEN
);
3649 if (conn
->conn_ops
->HeaderDigest
) {
3650 u32
*header_digest
= (u32
*)&cmd
->pdu
[ISCSI_HDR_LEN
];
3652 iscsit_do_crypto_hash_buf(&conn
->conn_tx_hash
, hdr
,
3653 ISCSI_HDR_LEN
, 0, NULL
, (u8
*)header_digest
);
3655 iov
[0].iov_len
+= ISCSI_CRC_LEN
;
3656 tx_size
+= ISCSI_CRC_LEN
;
3657 pr_debug("Attaching CRC32 HeaderDigest for"
3658 " REJECT PDU 0x%08x\n", *header_digest
);
3661 if (conn
->conn_ops
->DataDigest
) {
3662 iscsit_do_crypto_hash_buf(&conn
->conn_tx_hash
, cmd
->buf_ptr
,
3663 ISCSI_HDR_LEN
, 0, NULL
, (u8
*)&cmd
->data_crc
);
3665 iov
[iov_count
].iov_base
= &cmd
->data_crc
;
3666 iov
[iov_count
++].iov_len
= ISCSI_CRC_LEN
;
3667 tx_size
+= ISCSI_CRC_LEN
;
3668 pr_debug("Attaching CRC32 DataDigest for REJECT"
3669 " PDU 0x%08x\n", cmd
->data_crc
);
3672 cmd
->iov_misc_count
= iov_count
;
3673 cmd
->tx_size
= tx_size
;
3675 pr_debug("Built Reject PDU StatSN: 0x%08x, Reason: 0x%02x,"
3676 " CID: %hu\n", ntohl(hdr
->statsn
), hdr
->reason
, conn
->cid
);
3681 void iscsit_thread_get_cpumask(struct iscsi_conn
*conn
)
3683 struct iscsi_thread_set
*ts
= conn
->thread_set
;
3686 * thread_id is assigned from iscsit_global->ts_bitmap from
3687 * within iscsi_thread_set.c:iscsi_allocate_thread_sets()
3689 * Here we use thread_id to determine which CPU that this
3690 * iSCSI connection's iscsi_thread_set will be scheduled to
3693 ord
= ts
->thread_id
% cpumask_weight(cpu_online_mask
);
3694 for_each_online_cpu(cpu
) {
3696 cpumask_set_cpu(cpu
, conn
->conn_cpumask
);
3701 * This should never be reached..
3704 cpumask_setall(conn
->conn_cpumask
);
3707 static inline void iscsit_thread_check_cpumask(
3708 struct iscsi_conn
*conn
,
3709 struct task_struct
*p
,
3714 * mode == 1 signals iscsi_target_tx_thread() usage.
3715 * mode == 0 signals iscsi_target_rx_thread() usage.
3718 if (!conn
->conn_tx_reset_cpumask
)
3720 conn
->conn_tx_reset_cpumask
= 0;
3722 if (!conn
->conn_rx_reset_cpumask
)
3724 conn
->conn_rx_reset_cpumask
= 0;
3727 * Update the CPU mask for this single kthread so that
3728 * both TX and RX kthreads are scheduled to run on the
3731 memset(buf
, 0, 128);
3732 cpumask_scnprintf(buf
, 128, conn
->conn_cpumask
);
3733 set_cpus_allowed_ptr(p
, conn
->conn_cpumask
);
3737 iscsit_immediate_queue(struct iscsi_conn
*conn
, struct iscsi_cmd
*cmd
, int state
)
3742 case ISTATE_SEND_R2T
:
3743 ret
= iscsit_send_r2t(cmd
, conn
);
3748 spin_lock_bh(&conn
->cmd_lock
);
3749 list_del_init(&cmd
->i_conn_node
);
3750 spin_unlock_bh(&conn
->cmd_lock
);
3752 iscsit_free_cmd(cmd
, false);
3754 case ISTATE_SEND_NOPIN_WANT_RESPONSE
:
3755 iscsit_mod_nopin_response_timer(conn
);
3756 ret
= iscsit_send_unsolicited_nopin(cmd
, conn
, 1);
3760 case ISTATE_SEND_NOPIN_NO_RESPONSE
:
3761 ret
= iscsit_send_unsolicited_nopin(cmd
, conn
, 0);
3766 pr_err("Unknown Opcode: 0x%02x ITT:"
3767 " 0x%08x, i_state: %d on CID: %hu\n",
3768 cmd
->iscsi_opcode
, cmd
->init_task_tag
, state
,
3780 iscsit_handle_immediate_queue(struct iscsi_conn
*conn
)
3782 struct iscsit_transport
*t
= conn
->conn_transport
;
3783 struct iscsi_queue_req
*qr
;
3784 struct iscsi_cmd
*cmd
;
3788 while ((qr
= iscsit_get_cmd_from_immediate_queue(conn
))) {
3789 atomic_set(&conn
->check_immediate_queue
, 0);
3792 kmem_cache_free(lio_qr_cache
, qr
);
3794 ret
= t
->iscsit_immediate_queue(conn
, cmd
, state
);
3803 iscsit_response_queue(struct iscsi_conn
*conn
, struct iscsi_cmd
*cmd
, int state
)
3809 case ISTATE_SEND_DATAIN
:
3810 ret
= iscsit_send_datain(cmd
, conn
);
3815 goto check_rsp_state
;
3816 else if (ret
== 1) {
3818 spin_lock_bh(&cmd
->istate_lock
);
3819 cmd
->i_state
= ISTATE_SENT_STATUS
;
3820 spin_unlock_bh(&cmd
->istate_lock
);
3822 if (atomic_read(&conn
->check_immediate_queue
))
3826 } else if (ret
== 2) {
3827 /* Still must send status,
3828 SCF_TRANSPORT_TASK_SENSE was set */
3829 spin_lock_bh(&cmd
->istate_lock
);
3830 cmd
->i_state
= ISTATE_SEND_STATUS
;
3831 spin_unlock_bh(&cmd
->istate_lock
);
3832 state
= ISTATE_SEND_STATUS
;
3833 goto check_rsp_state
;
3837 case ISTATE_SEND_STATUS
:
3838 case ISTATE_SEND_STATUS_RECOVERY
:
3839 ret
= iscsit_send_response(cmd
, conn
);
3841 case ISTATE_SEND_LOGOUTRSP
:
3842 ret
= iscsit_send_logout(cmd
, conn
);
3844 case ISTATE_SEND_ASYNCMSG
:
3845 ret
= iscsit_send_conn_drop_async_message(
3848 case ISTATE_SEND_NOPIN
:
3849 ret
= iscsit_send_nopin(cmd
, conn
);
3851 case ISTATE_SEND_REJECT
:
3852 ret
= iscsit_send_reject(cmd
, conn
);
3854 case ISTATE_SEND_TASKMGTRSP
:
3855 ret
= iscsit_send_task_mgt_rsp(cmd
, conn
);
3858 ret
= iscsit_tmr_post_handler(cmd
, conn
);
3860 iscsit_fall_back_to_erl0(conn
->sess
);
3862 case ISTATE_SEND_TEXTRSP
:
3863 ret
= iscsit_send_text_rsp(cmd
, conn
);
3866 pr_err("Unknown Opcode: 0x%02x ITT:"
3867 " 0x%08x, i_state: %d on CID: %hu\n",
3868 cmd
->iscsi_opcode
, cmd
->init_task_tag
,
3875 if (iscsit_send_tx_data(cmd
, conn
, 1) < 0) {
3876 iscsit_tx_thread_wait_for_tcp(conn
);
3877 iscsit_unmap_iovec(cmd
);
3880 iscsit_unmap_iovec(cmd
);
3883 case ISTATE_SEND_LOGOUTRSP
:
3884 if (!iscsit_logout_post_handler(cmd
, conn
))
3887 case ISTATE_SEND_STATUS
:
3888 case ISTATE_SEND_ASYNCMSG
:
3889 case ISTATE_SEND_NOPIN
:
3890 case ISTATE_SEND_STATUS_RECOVERY
:
3891 case ISTATE_SEND_TEXTRSP
:
3892 case ISTATE_SEND_TASKMGTRSP
:
3893 case ISTATE_SEND_REJECT
:
3894 spin_lock_bh(&cmd
->istate_lock
);
3895 cmd
->i_state
= ISTATE_SENT_STATUS
;
3896 spin_unlock_bh(&cmd
->istate_lock
);
3899 pr_err("Unknown Opcode: 0x%02x ITT:"
3900 " 0x%08x, i_state: %d on CID: %hu\n",
3901 cmd
->iscsi_opcode
, cmd
->init_task_tag
,
3902 cmd
->i_state
, conn
->cid
);
3906 if (atomic_read(&conn
->check_immediate_queue
))
3917 static int iscsit_handle_response_queue(struct iscsi_conn
*conn
)
3919 struct iscsit_transport
*t
= conn
->conn_transport
;
3920 struct iscsi_queue_req
*qr
;
3921 struct iscsi_cmd
*cmd
;
3925 while ((qr
= iscsit_get_cmd_from_response_queue(conn
))) {
3928 kmem_cache_free(lio_qr_cache
, qr
);
3930 ret
= t
->iscsit_response_queue(conn
, cmd
, state
);
3931 if (ret
== 1 || ret
< 0)
3938 int iscsi_target_tx_thread(void *arg
)
3941 struct iscsi_conn
*conn
;
3942 struct iscsi_thread_set
*ts
= arg
;
3944 * Allow ourselves to be interrupted by SIGINT so that a
3945 * connection recovery / failure event can be triggered externally.
3947 allow_signal(SIGINT
);
3950 conn
= iscsi_tx_thread_pre_handler(ts
);
3956 while (!kthread_should_stop()) {
3958 * Ensure that both TX and RX per connection kthreads
3959 * are scheduled to run on the same CPU.
3961 iscsit_thread_check_cpumask(conn
, current
, 1);
3963 wait_event_interruptible(conn
->queues_wq
,
3964 !iscsit_conn_all_queues_empty(conn
) ||
3965 ts
->status
== ISCSI_THREAD_SET_RESET
);
3967 if ((ts
->status
== ISCSI_THREAD_SET_RESET
) ||
3968 signal_pending(current
))
3972 ret
= iscsit_handle_immediate_queue(conn
);
3976 ret
= iscsit_handle_response_queue(conn
);
3979 else if (ret
== -EAGAIN
)
3986 iscsit_take_action_for_connection_exit(conn
);
3992 static int iscsi_target_rx_opcode(struct iscsi_conn
*conn
, unsigned char *buf
)
3994 struct iscsi_hdr
*hdr
= (struct iscsi_hdr
*)buf
;
3995 struct iscsi_cmd
*cmd
;
3998 switch (hdr
->opcode
& ISCSI_OPCODE_MASK
) {
3999 case ISCSI_OP_SCSI_CMD
:
4000 cmd
= iscsit_allocate_cmd(conn
, TASK_INTERRUPTIBLE
);
4004 ret
= iscsit_handle_scsi_cmd(conn
, cmd
, buf
);
4006 case ISCSI_OP_SCSI_DATA_OUT
:
4007 ret
= iscsit_handle_data_out(conn
, buf
);
4009 case ISCSI_OP_NOOP_OUT
:
4011 if (hdr
->ttt
== cpu_to_be32(0xFFFFFFFF)) {
4012 cmd
= iscsit_allocate_cmd(conn
, TASK_INTERRUPTIBLE
);
4016 ret
= iscsit_handle_nop_out(conn
, cmd
, buf
);
4018 case ISCSI_OP_SCSI_TMFUNC
:
4019 cmd
= iscsit_allocate_cmd(conn
, TASK_INTERRUPTIBLE
);
4023 ret
= iscsit_handle_task_mgt_cmd(conn
, cmd
, buf
);
4026 cmd
= iscsit_allocate_cmd(conn
, TASK_INTERRUPTIBLE
);
4030 ret
= iscsit_handle_text_cmd(conn
, cmd
, buf
);
4032 case ISCSI_OP_LOGOUT
:
4033 cmd
= iscsit_allocate_cmd(conn
, TASK_INTERRUPTIBLE
);
4037 ret
= iscsit_handle_logout_cmd(conn
, cmd
, buf
);
4039 wait_for_completion_timeout(&conn
->conn_logout_comp
,
4040 SECONDS_FOR_LOGOUT_COMP
* HZ
);
4042 case ISCSI_OP_SNACK
:
4043 ret
= iscsit_handle_snack(conn
, buf
);
4046 pr_err("Got unknown iSCSI OpCode: 0x%02x\n", hdr
->opcode
);
4047 if (!conn
->sess
->sess_ops
->ErrorRecoveryLevel
) {
4048 pr_err("Cannot recover from unknown"
4049 " opcode while ERL=0, closing iSCSI connection.\n");
4052 if (!conn
->conn_ops
->OFMarker
) {
4053 pr_err("Unable to recover from unknown"
4054 " opcode while OFMarker=No, closing iSCSI"
4058 if (iscsit_recover_from_unknown_opcode(conn
) < 0) {
4059 pr_err("Unable to recover from unknown"
4060 " opcode, closing iSCSI connection.\n");
4068 return iscsit_add_reject(conn
, ISCSI_REASON_BOOKMARK_NO_RESOURCES
, buf
);
4071 int iscsi_target_rx_thread(void *arg
)
4074 u8 buffer
[ISCSI_HDR_LEN
], opcode
;
4075 u32 checksum
= 0, digest
= 0;
4076 struct iscsi_conn
*conn
= NULL
;
4077 struct iscsi_thread_set
*ts
= arg
;
4080 * Allow ourselves to be interrupted by SIGINT so that a
4081 * connection recovery / failure event can be triggered externally.
4083 allow_signal(SIGINT
);
4086 conn
= iscsi_rx_thread_pre_handler(ts
);
4090 if (conn
->conn_transport
->transport_type
== ISCSI_INFINIBAND
) {
4091 struct completion comp
;
4094 init_completion(&comp
);
4095 rc
= wait_for_completion_interruptible(&comp
);
4102 while (!kthread_should_stop()) {
4104 * Ensure that both TX and RX per connection kthreads
4105 * are scheduled to run on the same CPU.
4107 iscsit_thread_check_cpumask(conn
, current
, 0);
4109 memset(buffer
, 0, ISCSI_HDR_LEN
);
4110 memset(&iov
, 0, sizeof(struct kvec
));
4112 iov
.iov_base
= buffer
;
4113 iov
.iov_len
= ISCSI_HDR_LEN
;
4115 ret
= rx_data(conn
, &iov
, 1, ISCSI_HDR_LEN
);
4116 if (ret
!= ISCSI_HDR_LEN
) {
4117 iscsit_rx_thread_wait_for_tcp(conn
);
4121 if (conn
->conn_ops
->HeaderDigest
) {
4122 iov
.iov_base
= &digest
;
4123 iov
.iov_len
= ISCSI_CRC_LEN
;
4125 ret
= rx_data(conn
, &iov
, 1, ISCSI_CRC_LEN
);
4126 if (ret
!= ISCSI_CRC_LEN
) {
4127 iscsit_rx_thread_wait_for_tcp(conn
);
4131 iscsit_do_crypto_hash_buf(&conn
->conn_rx_hash
,
4132 buffer
, ISCSI_HDR_LEN
,
4133 0, NULL
, (u8
*)&checksum
);
4135 if (digest
!= checksum
) {
4136 pr_err("HeaderDigest CRC32C failed,"
4137 " received 0x%08x, computed 0x%08x\n",
4140 * Set the PDU to 0xff so it will intentionally
4141 * hit default in the switch below.
4143 memset(buffer
, 0xff, ISCSI_HDR_LEN
);
4144 atomic_long_inc(&conn
->sess
->conn_digest_errors
);
4146 pr_debug("Got HeaderDigest CRC32C"
4147 " 0x%08x\n", checksum
);
4151 if (conn
->conn_state
== TARG_CONN_STATE_IN_LOGOUT
)
4154 opcode
= buffer
[0] & ISCSI_OPCODE_MASK
;
4156 if (conn
->sess
->sess_ops
->SessionType
&&
4157 ((!(opcode
& ISCSI_OP_TEXT
)) ||
4158 (!(opcode
& ISCSI_OP_LOGOUT
)))) {
4159 pr_err("Received illegal iSCSI Opcode: 0x%02x"
4160 " while in Discovery Session, rejecting.\n", opcode
);
4161 iscsit_add_reject(conn
, ISCSI_REASON_PROTOCOL_ERROR
,
4166 ret
= iscsi_target_rx_opcode(conn
, buffer
);
4172 if (!signal_pending(current
))
4173 atomic_set(&conn
->transport_failed
, 1);
4174 iscsit_take_action_for_connection_exit(conn
);
4180 static void iscsit_release_commands_from_conn(struct iscsi_conn
*conn
)
4182 struct iscsi_cmd
*cmd
= NULL
, *cmd_tmp
= NULL
;
4183 struct iscsi_session
*sess
= conn
->sess
;
4185 * We expect this function to only ever be called from either RX or TX
4186 * thread context via iscsit_close_connection() once the other context
4187 * has been reset -> returned sleeping pre-handler state.
4189 spin_lock_bh(&conn
->cmd_lock
);
4190 list_for_each_entry_safe(cmd
, cmd_tmp
, &conn
->conn_cmd_list
, i_conn_node
) {
4192 list_del_init(&cmd
->i_conn_node
);
4193 spin_unlock_bh(&conn
->cmd_lock
);
4195 iscsit_increment_maxcmdsn(cmd
, sess
);
4197 iscsit_free_cmd(cmd
, true);
4199 spin_lock_bh(&conn
->cmd_lock
);
4201 spin_unlock_bh(&conn
->cmd_lock
);
4204 static void iscsit_stop_timers_for_cmds(
4205 struct iscsi_conn
*conn
)
4207 struct iscsi_cmd
*cmd
;
4209 spin_lock_bh(&conn
->cmd_lock
);
4210 list_for_each_entry(cmd
, &conn
->conn_cmd_list
, i_conn_node
) {
4211 if (cmd
->data_direction
== DMA_TO_DEVICE
)
4212 iscsit_stop_dataout_timer(cmd
);
4214 spin_unlock_bh(&conn
->cmd_lock
);
4217 int iscsit_close_connection(
4218 struct iscsi_conn
*conn
)
4220 int conn_logout
= (conn
->conn_state
== TARG_CONN_STATE_IN_LOGOUT
);
4221 struct iscsi_session
*sess
= conn
->sess
;
4223 pr_debug("Closing iSCSI connection CID %hu on SID:"
4224 " %u\n", conn
->cid
, sess
->sid
);
4226 * Always up conn_logout_comp just in case the RX Thread is sleeping
4227 * and the logout response never got sent because the connection
4230 complete(&conn
->conn_logout_comp
);
4232 iscsi_release_thread_set(conn
);
4234 iscsit_stop_timers_for_cmds(conn
);
4235 iscsit_stop_nopin_response_timer(conn
);
4236 iscsit_stop_nopin_timer(conn
);
4238 if (conn
->conn_transport
->iscsit_wait_conn
)
4239 conn
->conn_transport
->iscsit_wait_conn(conn
);
4242 * During Connection recovery drop unacknowledged out of order
4243 * commands for this connection, and prepare the other commands
4246 * During normal operation clear the out of order commands (but
4247 * do not free the struct iscsi_ooo_cmdsn's) and release all
4248 * struct iscsi_cmds.
4250 if (atomic_read(&conn
->connection_recovery
)) {
4251 iscsit_discard_unacknowledged_ooo_cmdsns_for_conn(conn
);
4252 iscsit_prepare_cmds_for_realligance(conn
);
4254 iscsit_clear_ooo_cmdsns_for_conn(conn
);
4255 iscsit_release_commands_from_conn(conn
);
4257 iscsit_free_queue_reqs_for_conn(conn
);
4260 * Handle decrementing session or connection usage count if
4261 * a logout response was not able to be sent because the
4262 * connection failed. Fall back to Session Recovery here.
4264 if (atomic_read(&conn
->conn_logout_remove
)) {
4265 if (conn
->conn_logout_reason
== ISCSI_LOGOUT_REASON_CLOSE_SESSION
) {
4266 iscsit_dec_conn_usage_count(conn
);
4267 iscsit_dec_session_usage_count(sess
);
4269 if (conn
->conn_logout_reason
== ISCSI_LOGOUT_REASON_CLOSE_CONNECTION
)
4270 iscsit_dec_conn_usage_count(conn
);
4272 atomic_set(&conn
->conn_logout_remove
, 0);
4273 atomic_set(&sess
->session_reinstatement
, 0);
4274 atomic_set(&sess
->session_fall_back_to_erl0
, 1);
4277 spin_lock_bh(&sess
->conn_lock
);
4278 list_del(&conn
->conn_list
);
4281 * Attempt to let the Initiator know this connection failed by
4282 * sending an Connection Dropped Async Message on another
4283 * active connection.
4285 if (atomic_read(&conn
->connection_recovery
))
4286 iscsit_build_conn_drop_async_message(conn
);
4288 spin_unlock_bh(&sess
->conn_lock
);
4291 * If connection reinstatement is being performed on this connection,
4292 * up the connection reinstatement semaphore that is being blocked on
4293 * in iscsit_cause_connection_reinstatement().
4295 spin_lock_bh(&conn
->state_lock
);
4296 if (atomic_read(&conn
->sleep_on_conn_wait_comp
)) {
4297 spin_unlock_bh(&conn
->state_lock
);
4298 complete(&conn
->conn_wait_comp
);
4299 wait_for_completion(&conn
->conn_post_wait_comp
);
4300 spin_lock_bh(&conn
->state_lock
);
4304 * If connection reinstatement is being performed on this connection
4305 * by receiving a REMOVECONNFORRECOVERY logout request, up the
4306 * connection wait rcfr semaphore that is being blocked on
4307 * an iscsit_connection_reinstatement_rcfr().
4309 if (atomic_read(&conn
->connection_wait_rcfr
)) {
4310 spin_unlock_bh(&conn
->state_lock
);
4311 complete(&conn
->conn_wait_rcfr_comp
);
4312 wait_for_completion(&conn
->conn_post_wait_comp
);
4313 spin_lock_bh(&conn
->state_lock
);
4315 atomic_set(&conn
->connection_reinstatement
, 1);
4316 spin_unlock_bh(&conn
->state_lock
);
4319 * If any other processes are accessing this connection pointer we
4320 * must wait until they have completed.
4322 iscsit_check_conn_usage_count(conn
);
4324 if (conn
->conn_rx_hash
.tfm
)
4325 crypto_free_hash(conn
->conn_rx_hash
.tfm
);
4326 if (conn
->conn_tx_hash
.tfm
)
4327 crypto_free_hash(conn
->conn_tx_hash
.tfm
);
4329 if (conn
->conn_cpumask
)
4330 free_cpumask_var(conn
->conn_cpumask
);
4332 kfree(conn
->conn_ops
);
4333 conn
->conn_ops
= NULL
;
4336 sock_release(conn
->sock
);
4338 if (conn
->conn_transport
->iscsit_free_conn
)
4339 conn
->conn_transport
->iscsit_free_conn(conn
);
4341 iscsit_put_transport(conn
->conn_transport
);
4343 conn
->thread_set
= NULL
;
4345 pr_debug("Moving to TARG_CONN_STATE_FREE.\n");
4346 conn
->conn_state
= TARG_CONN_STATE_FREE
;
4349 spin_lock_bh(&sess
->conn_lock
);
4350 atomic_dec(&sess
->nconn
);
4351 pr_debug("Decremented iSCSI connection count to %hu from node:"
4352 " %s\n", atomic_read(&sess
->nconn
),
4353 sess
->sess_ops
->InitiatorName
);
4355 * Make sure that if one connection fails in an non ERL=2 iSCSI
4356 * Session that they all fail.
4358 if ((sess
->sess_ops
->ErrorRecoveryLevel
!= 2) && !conn_logout
&&
4359 !atomic_read(&sess
->session_logout
))
4360 atomic_set(&sess
->session_fall_back_to_erl0
, 1);
4363 * If this was not the last connection in the session, and we are
4364 * performing session reinstatement or falling back to ERL=0, call
4365 * iscsit_stop_session() without sleeping to shutdown the other
4366 * active connections.
4368 if (atomic_read(&sess
->nconn
)) {
4369 if (!atomic_read(&sess
->session_reinstatement
) &&
4370 !atomic_read(&sess
->session_fall_back_to_erl0
)) {
4371 spin_unlock_bh(&sess
->conn_lock
);
4374 if (!atomic_read(&sess
->session_stop_active
)) {
4375 atomic_set(&sess
->session_stop_active
, 1);
4376 spin_unlock_bh(&sess
->conn_lock
);
4377 iscsit_stop_session(sess
, 0, 0);
4380 spin_unlock_bh(&sess
->conn_lock
);
4385 * If this was the last connection in the session and one of the
4386 * following is occurring:
4388 * Session Reinstatement is not being performed, and are falling back
4389 * to ERL=0 call iscsit_close_session().
4391 * Session Logout was requested. iscsit_close_session() will be called
4394 * Session Continuation is not being performed, start the Time2Retain
4395 * handler and check if sleep_on_sess_wait_sem is active.
4397 if (!atomic_read(&sess
->session_reinstatement
) &&
4398 atomic_read(&sess
->session_fall_back_to_erl0
)) {
4399 spin_unlock_bh(&sess
->conn_lock
);
4400 target_put_session(sess
->se_sess
);
4403 } else if (atomic_read(&sess
->session_logout
)) {
4404 pr_debug("Moving to TARG_SESS_STATE_FREE.\n");
4405 sess
->session_state
= TARG_SESS_STATE_FREE
;
4406 spin_unlock_bh(&sess
->conn_lock
);
4408 if (atomic_read(&sess
->sleep_on_sess_wait_comp
))
4409 complete(&sess
->session_wait_comp
);
4413 pr_debug("Moving to TARG_SESS_STATE_FAILED.\n");
4414 sess
->session_state
= TARG_SESS_STATE_FAILED
;
4416 if (!atomic_read(&sess
->session_continuation
)) {
4417 spin_unlock_bh(&sess
->conn_lock
);
4418 iscsit_start_time2retain_handler(sess
);
4420 spin_unlock_bh(&sess
->conn_lock
);
4422 if (atomic_read(&sess
->sleep_on_sess_wait_comp
))
4423 complete(&sess
->session_wait_comp
);
4427 spin_unlock_bh(&sess
->conn_lock
);
4432 int iscsit_close_session(struct iscsi_session
*sess
)
4434 struct iscsi_portal_group
*tpg
= sess
->tpg
;
4435 struct se_portal_group
*se_tpg
= &tpg
->tpg_se_tpg
;
4437 if (atomic_read(&sess
->nconn
)) {
4438 pr_err("%d connection(s) still exist for iSCSI session"
4439 " to %s\n", atomic_read(&sess
->nconn
),
4440 sess
->sess_ops
->InitiatorName
);
4444 spin_lock_bh(&se_tpg
->session_lock
);
4445 atomic_set(&sess
->session_logout
, 1);
4446 atomic_set(&sess
->session_reinstatement
, 1);
4447 iscsit_stop_time2retain_timer(sess
);
4448 spin_unlock_bh(&se_tpg
->session_lock
);
4451 * transport_deregister_session_configfs() will clear the
4452 * struct se_node_acl->nacl_sess pointer now as a iscsi_np process context
4453 * can be setting it again with __transport_register_session() in
4454 * iscsi_post_login_handler() again after the iscsit_stop_session()
4455 * completes in iscsi_np context.
4457 transport_deregister_session_configfs(sess
->se_sess
);
4460 * If any other processes are accessing this session pointer we must
4461 * wait until they have completed. If we are in an interrupt (the
4462 * time2retain handler) and contain and active session usage count we
4463 * restart the timer and exit.
4465 if (!in_interrupt()) {
4466 if (iscsit_check_session_usage_count(sess
) == 1)
4467 iscsit_stop_session(sess
, 1, 1);
4469 if (iscsit_check_session_usage_count(sess
) == 2) {
4470 atomic_set(&sess
->session_logout
, 0);
4471 iscsit_start_time2retain_handler(sess
);
4476 transport_deregister_session(sess
->se_sess
);
4478 if (sess
->sess_ops
->ErrorRecoveryLevel
== 2)
4479 iscsit_free_connection_recovery_entires(sess
);
4481 iscsit_free_all_ooo_cmdsns(sess
);
4483 spin_lock_bh(&se_tpg
->session_lock
);
4484 pr_debug("Moving to TARG_SESS_STATE_FREE.\n");
4485 sess
->session_state
= TARG_SESS_STATE_FREE
;
4486 pr_debug("Released iSCSI session from node: %s\n",
4487 sess
->sess_ops
->InitiatorName
);
4490 tpg
->tpg_tiqn
->tiqn_nsessions
--;
4492 pr_debug("Decremented number of active iSCSI Sessions on"
4493 " iSCSI TPG: %hu to %u\n", tpg
->tpgt
, tpg
->nsessions
);
4495 spin_lock(&sess_idr_lock
);
4496 idr_remove(&sess_idr
, sess
->session_index
);
4497 spin_unlock(&sess_idr_lock
);
4499 kfree(sess
->sess_ops
);
4500 sess
->sess_ops
= NULL
;
4501 spin_unlock_bh(&se_tpg
->session_lock
);
4507 static void iscsit_logout_post_handler_closesession(
4508 struct iscsi_conn
*conn
)
4510 struct iscsi_session
*sess
= conn
->sess
;
4512 iscsi_set_thread_clear(conn
, ISCSI_CLEAR_TX_THREAD
);
4513 iscsi_set_thread_set_signal(conn
, ISCSI_SIGNAL_TX_THREAD
);
4515 atomic_set(&conn
->conn_logout_remove
, 0);
4516 complete(&conn
->conn_logout_comp
);
4518 iscsit_dec_conn_usage_count(conn
);
4519 iscsit_stop_session(sess
, 1, 1);
4520 iscsit_dec_session_usage_count(sess
);
4521 target_put_session(sess
->se_sess
);
4524 static void iscsit_logout_post_handler_samecid(
4525 struct iscsi_conn
*conn
)
4527 iscsi_set_thread_clear(conn
, ISCSI_CLEAR_TX_THREAD
);
4528 iscsi_set_thread_set_signal(conn
, ISCSI_SIGNAL_TX_THREAD
);
4530 atomic_set(&conn
->conn_logout_remove
, 0);
4531 complete(&conn
->conn_logout_comp
);
4533 iscsit_cause_connection_reinstatement(conn
, 1);
4534 iscsit_dec_conn_usage_count(conn
);
4537 static void iscsit_logout_post_handler_diffcid(
4538 struct iscsi_conn
*conn
,
4541 struct iscsi_conn
*l_conn
;
4542 struct iscsi_session
*sess
= conn
->sess
;
4547 spin_lock_bh(&sess
->conn_lock
);
4548 list_for_each_entry(l_conn
, &sess
->sess_conn_list
, conn_list
) {
4549 if (l_conn
->cid
== cid
) {
4550 iscsit_inc_conn_usage_count(l_conn
);
4554 spin_unlock_bh(&sess
->conn_lock
);
4560 l_conn
->sock
->ops
->shutdown(l_conn
->sock
, RCV_SHUTDOWN
);
4562 spin_lock_bh(&l_conn
->state_lock
);
4563 pr_debug("Moving to TARG_CONN_STATE_IN_LOGOUT.\n");
4564 l_conn
->conn_state
= TARG_CONN_STATE_IN_LOGOUT
;
4565 spin_unlock_bh(&l_conn
->state_lock
);
4567 iscsit_cause_connection_reinstatement(l_conn
, 1);
4568 iscsit_dec_conn_usage_count(l_conn
);
4572 * Return of 0 causes the TX thread to restart.
4574 int iscsit_logout_post_handler(
4575 struct iscsi_cmd
*cmd
,
4576 struct iscsi_conn
*conn
)
4580 switch (cmd
->logout_reason
) {
4581 case ISCSI_LOGOUT_REASON_CLOSE_SESSION
:
4582 switch (cmd
->logout_response
) {
4583 case ISCSI_LOGOUT_SUCCESS
:
4584 case ISCSI_LOGOUT_CLEANUP_FAILED
:
4586 iscsit_logout_post_handler_closesession(conn
);
4591 case ISCSI_LOGOUT_REASON_CLOSE_CONNECTION
:
4592 if (conn
->cid
== cmd
->logout_cid
) {
4593 switch (cmd
->logout_response
) {
4594 case ISCSI_LOGOUT_SUCCESS
:
4595 case ISCSI_LOGOUT_CLEANUP_FAILED
:
4597 iscsit_logout_post_handler_samecid(conn
);
4602 switch (cmd
->logout_response
) {
4603 case ISCSI_LOGOUT_SUCCESS
:
4604 iscsit_logout_post_handler_diffcid(conn
,
4607 case ISCSI_LOGOUT_CID_NOT_FOUND
:
4608 case ISCSI_LOGOUT_CLEANUP_FAILED
:
4615 case ISCSI_LOGOUT_REASON_RECOVERY
:
4616 switch (cmd
->logout_response
) {
4617 case ISCSI_LOGOUT_SUCCESS
:
4618 case ISCSI_LOGOUT_CID_NOT_FOUND
:
4619 case ISCSI_LOGOUT_RECOVERY_UNSUPPORTED
:
4620 case ISCSI_LOGOUT_CLEANUP_FAILED
:
4632 EXPORT_SYMBOL(iscsit_logout_post_handler
);
4634 void iscsit_fail_session(struct iscsi_session
*sess
)
4636 struct iscsi_conn
*conn
;
4638 spin_lock_bh(&sess
->conn_lock
);
4639 list_for_each_entry(conn
, &sess
->sess_conn_list
, conn_list
) {
4640 pr_debug("Moving to TARG_CONN_STATE_CLEANUP_WAIT.\n");
4641 conn
->conn_state
= TARG_CONN_STATE_CLEANUP_WAIT
;
4643 spin_unlock_bh(&sess
->conn_lock
);
4645 pr_debug("Moving to TARG_SESS_STATE_FAILED.\n");
4646 sess
->session_state
= TARG_SESS_STATE_FAILED
;
4649 int iscsit_free_session(struct iscsi_session
*sess
)
4651 u16 conn_count
= atomic_read(&sess
->nconn
);
4652 struct iscsi_conn
*conn
, *conn_tmp
= NULL
;
4655 spin_lock_bh(&sess
->conn_lock
);
4656 atomic_set(&sess
->sleep_on_sess_wait_comp
, 1);
4658 list_for_each_entry_safe(conn
, conn_tmp
, &sess
->sess_conn_list
,
4660 if (conn_count
== 0)
4663 if (list_is_last(&conn
->conn_list
, &sess
->sess_conn_list
)) {
4666 iscsit_inc_conn_usage_count(conn_tmp
);
4669 iscsit_inc_conn_usage_count(conn
);
4671 spin_unlock_bh(&sess
->conn_lock
);
4672 iscsit_cause_connection_reinstatement(conn
, 1);
4673 spin_lock_bh(&sess
->conn_lock
);
4675 iscsit_dec_conn_usage_count(conn
);
4677 iscsit_dec_conn_usage_count(conn_tmp
);
4682 if (atomic_read(&sess
->nconn
)) {
4683 spin_unlock_bh(&sess
->conn_lock
);
4684 wait_for_completion(&sess
->session_wait_comp
);
4686 spin_unlock_bh(&sess
->conn_lock
);
4688 target_put_session(sess
->se_sess
);
4692 void iscsit_stop_session(
4693 struct iscsi_session
*sess
,
4695 int connection_sleep
)
4697 u16 conn_count
= atomic_read(&sess
->nconn
);
4698 struct iscsi_conn
*conn
, *conn_tmp
= NULL
;
4701 spin_lock_bh(&sess
->conn_lock
);
4703 atomic_set(&sess
->sleep_on_sess_wait_comp
, 1);
4705 if (connection_sleep
) {
4706 list_for_each_entry_safe(conn
, conn_tmp
, &sess
->sess_conn_list
,
4708 if (conn_count
== 0)
4711 if (list_is_last(&conn
->conn_list
, &sess
->sess_conn_list
)) {
4714 iscsit_inc_conn_usage_count(conn_tmp
);
4717 iscsit_inc_conn_usage_count(conn
);
4719 spin_unlock_bh(&sess
->conn_lock
);
4720 iscsit_cause_connection_reinstatement(conn
, 1);
4721 spin_lock_bh(&sess
->conn_lock
);
4723 iscsit_dec_conn_usage_count(conn
);
4725 iscsit_dec_conn_usage_count(conn_tmp
);
4729 list_for_each_entry(conn
, &sess
->sess_conn_list
, conn_list
)
4730 iscsit_cause_connection_reinstatement(conn
, 0);
4733 if (session_sleep
&& atomic_read(&sess
->nconn
)) {
4734 spin_unlock_bh(&sess
->conn_lock
);
4735 wait_for_completion(&sess
->session_wait_comp
);
4737 spin_unlock_bh(&sess
->conn_lock
);
4740 int iscsit_release_sessions_for_tpg(struct iscsi_portal_group
*tpg
, int force
)
4742 struct iscsi_session
*sess
;
4743 struct se_portal_group
*se_tpg
= &tpg
->tpg_se_tpg
;
4744 struct se_session
*se_sess
, *se_sess_tmp
;
4745 int session_count
= 0;
4747 spin_lock_bh(&se_tpg
->session_lock
);
4748 if (tpg
->nsessions
&& !force
) {
4749 spin_unlock_bh(&se_tpg
->session_lock
);
4753 list_for_each_entry_safe(se_sess
, se_sess_tmp
, &se_tpg
->tpg_sess_list
,
4755 sess
= (struct iscsi_session
*)se_sess
->fabric_sess_ptr
;
4757 spin_lock(&sess
->conn_lock
);
4758 if (atomic_read(&sess
->session_fall_back_to_erl0
) ||
4759 atomic_read(&sess
->session_logout
) ||
4760 (sess
->time2retain_timer_flags
& ISCSI_TF_EXPIRED
)) {
4761 spin_unlock(&sess
->conn_lock
);
4764 atomic_set(&sess
->session_reinstatement
, 1);
4765 spin_unlock(&sess
->conn_lock
);
4766 spin_unlock_bh(&se_tpg
->session_lock
);
4768 iscsit_free_session(sess
);
4769 spin_lock_bh(&se_tpg
->session_lock
);
4773 spin_unlock_bh(&se_tpg
->session_lock
);
4775 pr_debug("Released %d iSCSI Session(s) from Target Portal"
4776 " Group: %hu\n", session_count
, tpg
->tpgt
);
4780 MODULE_DESCRIPTION("iSCSI-Target Driver for mainline target infrastructure");
4781 MODULE_VERSION("4.1.x");
4782 MODULE_AUTHOR("nab@Linux-iSCSI.org");
4783 MODULE_LICENSE("GPL");
4785 module_init(iscsi_target_init_module
);
4786 module_exit(iscsi_target_cleanup_module
);