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_SPINLOCK(np_lock
);
57 static struct idr tiqn_idr
;
59 struct mutex auth_id_lock
;
60 spinlock_t sess_idr_lock
;
62 struct iscsit_global
*iscsit_global
;
64 struct kmem_cache
*lio_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
== true) && (np
->np_port
== port
) &&
304 (np
->np_network_transport
== network_transport
))
310 static struct iscsi_np
*iscsit_get_np(
311 struct __kernel_sockaddr_storage
*sockaddr
,
312 int network_transport
)
317 spin_lock_bh(&np_lock
);
318 list_for_each_entry(np
, &g_np_list
, np_list
) {
319 spin_lock(&np
->np_thread_lock
);
320 if (np
->np_thread_state
!= ISCSI_NP_THREAD_ACTIVE
) {
321 spin_unlock(&np
->np_thread_lock
);
325 match
= iscsit_check_np_match(sockaddr
, np
, network_transport
);
328 * Increment the np_exports reference count now to
329 * prevent iscsit_del_np() below from being called
330 * while iscsi_tpg_add_network_portal() is called.
333 spin_unlock(&np
->np_thread_lock
);
334 spin_unlock_bh(&np_lock
);
337 spin_unlock(&np
->np_thread_lock
);
339 spin_unlock_bh(&np_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 * Locate the existing struct iscsi_np if already active..
356 np
= iscsit_get_np(sockaddr
, network_transport
);
360 np
= kzalloc(sizeof(struct iscsi_np
), GFP_KERNEL
);
362 pr_err("Unable to allocate memory for struct iscsi_np\n");
363 return ERR_PTR(-ENOMEM
);
366 np
->np_flags
|= NPF_IP_NETWORK
;
367 if (sockaddr
->ss_family
== AF_INET6
) {
368 sock_in6
= (struct sockaddr_in6
*)sockaddr
;
369 snprintf(np
->np_ip
, IPV6_ADDRESS_SPACE
, "%s", ip_str
);
370 np
->np_port
= ntohs(sock_in6
->sin6_port
);
372 sock_in
= (struct sockaddr_in
*)sockaddr
;
373 sprintf(np
->np_ip
, "%s", ip_str
);
374 np
->np_port
= ntohs(sock_in
->sin_port
);
377 np
->np_network_transport
= network_transport
;
378 spin_lock_init(&np
->np_thread_lock
);
379 init_completion(&np
->np_restart_comp
);
380 INIT_LIST_HEAD(&np
->np_list
);
382 ret
= iscsi_target_setup_login_socket(np
, sockaddr
);
388 np
->np_thread
= kthread_run(iscsi_target_login_thread
, np
, "iscsi_np");
389 if (IS_ERR(np
->np_thread
)) {
390 pr_err("Unable to create kthread: iscsi_np\n");
391 ret
= PTR_ERR(np
->np_thread
);
396 * Increment the np_exports reference count now to prevent
397 * iscsit_del_np() below from being run while a new call to
398 * iscsi_tpg_add_network_portal() for a matching iscsi_np is
399 * active. We don't need to hold np->np_thread_lock at this
400 * point because iscsi_np has not been added to g_np_list yet.
404 spin_lock_bh(&np_lock
);
405 list_add_tail(&np
->np_list
, &g_np_list
);
406 spin_unlock_bh(&np_lock
);
408 pr_debug("CORE[0] - Added Network Portal: %s:%hu on %s\n",
409 np
->np_ip
, np
->np_port
, np
->np_transport
->name
);
414 int iscsit_reset_np_thread(
416 struct iscsi_tpg_np
*tpg_np
,
417 struct iscsi_portal_group
*tpg
,
420 spin_lock_bh(&np
->np_thread_lock
);
421 if (np
->np_thread_state
== ISCSI_NP_THREAD_INACTIVE
) {
422 spin_unlock_bh(&np
->np_thread_lock
);
425 np
->np_thread_state
= ISCSI_NP_THREAD_RESET
;
428 spin_unlock_bh(&np
->np_thread_lock
);
429 send_sig(SIGINT
, np
->np_thread
, 1);
430 wait_for_completion(&np
->np_restart_comp
);
431 spin_lock_bh(&np
->np_thread_lock
);
433 spin_unlock_bh(&np
->np_thread_lock
);
435 if (tpg_np
&& shutdown
) {
436 kref_put(&tpg_np
->tpg_np_kref
, iscsit_login_kref_put
);
438 wait_for_completion(&tpg_np
->tpg_np_comp
);
444 static void iscsit_free_np(struct iscsi_np
*np
)
447 sock_release(np
->np_socket
);
450 int iscsit_del_np(struct iscsi_np
*np
)
452 spin_lock_bh(&np
->np_thread_lock
);
454 if (np
->np_exports
) {
455 spin_unlock_bh(&np
->np_thread_lock
);
458 np
->np_thread_state
= ISCSI_NP_THREAD_SHUTDOWN
;
459 spin_unlock_bh(&np
->np_thread_lock
);
463 * We need to send the signal to wakeup Linux/Net
464 * which may be sleeping in sock_accept()..
466 send_sig(SIGINT
, np
->np_thread
, 1);
467 kthread_stop(np
->np_thread
);
468 np
->np_thread
= NULL
;
471 np
->np_transport
->iscsit_free_np(np
);
473 spin_lock_bh(&np_lock
);
474 list_del(&np
->np_list
);
475 spin_unlock_bh(&np_lock
);
477 pr_debug("CORE[0] - Removed Network Portal: %s:%hu on %s\n",
478 np
->np_ip
, np
->np_port
, np
->np_transport
->name
);
480 iscsit_put_transport(np
->np_transport
);
485 static int iscsit_immediate_queue(struct iscsi_conn
*, struct iscsi_cmd
*, int);
486 static int iscsit_response_queue(struct iscsi_conn
*, struct iscsi_cmd
*, int);
488 static int iscsit_queue_rsp(struct iscsi_conn
*conn
, struct iscsi_cmd
*cmd
)
490 iscsit_add_cmd_to_response_queue(cmd
, cmd
->conn
, cmd
->i_state
);
494 static struct iscsit_transport iscsi_target_transport
= {
496 .transport_type
= ISCSI_TCP
,
498 .iscsit_setup_np
= iscsit_setup_np
,
499 .iscsit_accept_np
= iscsit_accept_np
,
500 .iscsit_free_np
= iscsit_free_np
,
501 .iscsit_get_login_rx
= iscsit_get_login_rx
,
502 .iscsit_put_login_tx
= iscsit_put_login_tx
,
503 .iscsit_get_dataout
= iscsit_build_r2ts_for_cmd
,
504 .iscsit_immediate_queue
= iscsit_immediate_queue
,
505 .iscsit_response_queue
= iscsit_response_queue
,
506 .iscsit_queue_data_in
= iscsit_queue_rsp
,
507 .iscsit_queue_status
= iscsit_queue_rsp
,
510 static int __init
iscsi_target_init_module(void)
514 pr_debug("iSCSI-Target "ISCSIT_VERSION
"\n");
516 iscsit_global
= kzalloc(sizeof(struct iscsit_global
), GFP_KERNEL
);
517 if (!iscsit_global
) {
518 pr_err("Unable to allocate memory for iscsit_global\n");
521 mutex_init(&auth_id_lock
);
522 spin_lock_init(&sess_idr_lock
);
526 ret
= iscsi_target_register_configfs();
530 ret
= iscsi_thread_set_init();
534 if (iscsi_allocate_thread_sets(TARGET_THREAD_SET_COUNT
) !=
535 TARGET_THREAD_SET_COUNT
) {
536 pr_err("iscsi_allocate_thread_sets() returned"
537 " unexpected value!\n");
541 lio_qr_cache
= kmem_cache_create("lio_qr_cache",
542 sizeof(struct iscsi_queue_req
),
543 __alignof__(struct iscsi_queue_req
), 0, NULL
);
545 pr_err("nable to kmem_cache_create() for"
550 lio_dr_cache
= kmem_cache_create("lio_dr_cache",
551 sizeof(struct iscsi_datain_req
),
552 __alignof__(struct iscsi_datain_req
), 0, NULL
);
554 pr_err("Unable to kmem_cache_create() for"
559 lio_ooo_cache
= kmem_cache_create("lio_ooo_cache",
560 sizeof(struct iscsi_ooo_cmdsn
),
561 __alignof__(struct iscsi_ooo_cmdsn
), 0, NULL
);
562 if (!lio_ooo_cache
) {
563 pr_err("Unable to kmem_cache_create() for"
568 lio_r2t_cache
= kmem_cache_create("lio_r2t_cache",
569 sizeof(struct iscsi_r2t
), __alignof__(struct iscsi_r2t
),
571 if (!lio_r2t_cache
) {
572 pr_err("Unable to kmem_cache_create() for"
577 iscsit_register_transport(&iscsi_target_transport
);
579 if (iscsit_load_discovery_tpg() < 0)
584 kmem_cache_destroy(lio_r2t_cache
);
586 kmem_cache_destroy(lio_ooo_cache
);
588 kmem_cache_destroy(lio_dr_cache
);
590 kmem_cache_destroy(lio_qr_cache
);
592 iscsi_deallocate_thread_sets();
594 iscsi_thread_set_free();
596 iscsi_target_deregister_configfs();
598 kfree(iscsit_global
);
602 static void __exit
iscsi_target_cleanup_module(void)
604 iscsi_deallocate_thread_sets();
605 iscsi_thread_set_free();
606 iscsit_release_discovery_tpg();
607 iscsit_unregister_transport(&iscsi_target_transport
);
608 kmem_cache_destroy(lio_qr_cache
);
609 kmem_cache_destroy(lio_dr_cache
);
610 kmem_cache_destroy(lio_ooo_cache
);
611 kmem_cache_destroy(lio_r2t_cache
);
613 iscsi_target_deregister_configfs();
615 kfree(iscsit_global
);
618 static int iscsit_add_reject(
619 struct iscsi_conn
*conn
,
623 struct iscsi_cmd
*cmd
;
625 cmd
= iscsit_allocate_cmd(conn
, GFP_KERNEL
);
629 cmd
->iscsi_opcode
= ISCSI_OP_REJECT
;
630 cmd
->reject_reason
= reason
;
632 cmd
->buf_ptr
= kmemdup(buf
, ISCSI_HDR_LEN
, GFP_KERNEL
);
634 pr_err("Unable to allocate memory for cmd->buf_ptr\n");
635 iscsit_free_cmd(cmd
, false);
639 spin_lock_bh(&conn
->cmd_lock
);
640 list_add_tail(&cmd
->i_conn_node
, &conn
->conn_cmd_list
);
641 spin_unlock_bh(&conn
->cmd_lock
);
643 cmd
->i_state
= ISTATE_SEND_REJECT
;
644 iscsit_add_cmd_to_response_queue(cmd
, conn
, cmd
->i_state
);
649 static int iscsit_add_reject_from_cmd(
650 struct iscsi_cmd
*cmd
,
655 struct iscsi_conn
*conn
;
658 pr_err("cmd->conn is NULL for ITT: 0x%08x\n",
664 cmd
->iscsi_opcode
= ISCSI_OP_REJECT
;
665 cmd
->reject_reason
= reason
;
667 cmd
->buf_ptr
= kmemdup(buf
, ISCSI_HDR_LEN
, GFP_KERNEL
);
669 pr_err("Unable to allocate memory for cmd->buf_ptr\n");
670 iscsit_free_cmd(cmd
, false);
675 spin_lock_bh(&conn
->cmd_lock
);
676 list_add_tail(&cmd
->i_conn_node
, &conn
->conn_cmd_list
);
677 spin_unlock_bh(&conn
->cmd_lock
);
680 cmd
->i_state
= ISTATE_SEND_REJECT
;
681 iscsit_add_cmd_to_response_queue(cmd
, conn
, cmd
->i_state
);
683 * Perform the kref_put now if se_cmd has already been setup by
684 * scsit_setup_scsi_cmd()
686 if (cmd
->se_cmd
.se_tfo
!= NULL
) {
687 pr_debug("iscsi reject: calling target_put_sess_cmd >>>>>>\n");
688 target_put_sess_cmd(conn
->sess
->se_sess
, &cmd
->se_cmd
);
693 static int iscsit_add_reject_cmd(struct iscsi_cmd
*cmd
, u8 reason
,
696 return iscsit_add_reject_from_cmd(cmd
, reason
, true, buf
);
699 int iscsit_reject_cmd(struct iscsi_cmd
*cmd
, u8 reason
, unsigned char *buf
)
701 return iscsit_add_reject_from_cmd(cmd
, reason
, false, buf
);
705 * Map some portion of the allocated scatterlist to an iovec, suitable for
706 * kernel sockets to copy data in/out.
708 static int iscsit_map_iovec(
709 struct iscsi_cmd
*cmd
,
715 struct scatterlist
*sg
;
716 unsigned int page_off
;
719 * We know each entry in t_data_sg contains a page.
721 sg
= &cmd
->se_cmd
.t_data_sg
[data_offset
/ PAGE_SIZE
];
722 page_off
= (data_offset
% PAGE_SIZE
);
724 cmd
->first_data_sg
= sg
;
725 cmd
->first_data_sg_off
= page_off
;
727 while (data_length
) {
728 u32 cur_len
= min_t(u32
, data_length
, sg
->length
- page_off
);
730 iov
[i
].iov_base
= kmap(sg_page(sg
)) + sg
->offset
+ page_off
;
731 iov
[i
].iov_len
= cur_len
;
733 data_length
-= cur_len
;
739 cmd
->kmapped_nents
= i
;
744 static void iscsit_unmap_iovec(struct iscsi_cmd
*cmd
)
747 struct scatterlist
*sg
;
749 sg
= cmd
->first_data_sg
;
751 for (i
= 0; i
< cmd
->kmapped_nents
; i
++)
752 kunmap(sg_page(&sg
[i
]));
755 static void iscsit_ack_from_expstatsn(struct iscsi_conn
*conn
, u32 exp_statsn
)
758 struct iscsi_cmd
*cmd
, *cmd_p
;
760 conn
->exp_statsn
= exp_statsn
;
762 if (conn
->sess
->sess_ops
->RDMAExtensions
)
765 spin_lock_bh(&conn
->cmd_lock
);
766 list_for_each_entry_safe(cmd
, cmd_p
, &conn
->conn_cmd_list
, i_conn_node
) {
767 spin_lock(&cmd
->istate_lock
);
768 if ((cmd
->i_state
== ISTATE_SENT_STATUS
) &&
769 iscsi_sna_lt(cmd
->stat_sn
, exp_statsn
)) {
770 cmd
->i_state
= ISTATE_REMOVE
;
771 spin_unlock(&cmd
->istate_lock
);
772 list_move_tail(&cmd
->i_conn_node
, &ack_list
);
775 spin_unlock(&cmd
->istate_lock
);
777 spin_unlock_bh(&conn
->cmd_lock
);
779 list_for_each_entry_safe(cmd
, cmd_p
, &ack_list
, i_conn_node
) {
780 list_del(&cmd
->i_conn_node
);
781 iscsit_free_cmd(cmd
, false);
785 static int iscsit_allocate_iovecs(struct iscsi_cmd
*cmd
)
787 u32 iov_count
= max(1UL, DIV_ROUND_UP(cmd
->se_cmd
.data_length
, PAGE_SIZE
));
789 iov_count
+= ISCSI_IOV_DATA_BUFFER
;
791 cmd
->iov_data
= kzalloc(iov_count
* sizeof(struct kvec
), GFP_KERNEL
);
792 if (!cmd
->iov_data
) {
793 pr_err("Unable to allocate cmd->iov_data\n");
797 cmd
->orig_iov_data_count
= iov_count
;
801 int iscsit_setup_scsi_cmd(struct iscsi_conn
*conn
, struct iscsi_cmd
*cmd
,
804 int data_direction
, payload_length
;
805 struct iscsi_scsi_req
*hdr
;
809 atomic_long_inc(&conn
->sess
->cmd_pdus
);
811 hdr
= (struct iscsi_scsi_req
*) buf
;
812 payload_length
= ntoh24(hdr
->dlength
);
814 /* FIXME; Add checks for AdditionalHeaderSegment */
816 if (!(hdr
->flags
& ISCSI_FLAG_CMD_WRITE
) &&
817 !(hdr
->flags
& ISCSI_FLAG_CMD_FINAL
)) {
818 pr_err("ISCSI_FLAG_CMD_WRITE & ISCSI_FLAG_CMD_FINAL"
819 " not set. Bad iSCSI Initiator.\n");
820 return iscsit_add_reject_cmd(cmd
,
821 ISCSI_REASON_BOOKMARK_INVALID
, buf
);
824 if (((hdr
->flags
& ISCSI_FLAG_CMD_READ
) ||
825 (hdr
->flags
& ISCSI_FLAG_CMD_WRITE
)) && !hdr
->data_length
) {
827 * From RFC-3720 Section 10.3.1:
829 * "Either or both of R and W MAY be 1 when either the
830 * Expected Data Transfer Length and/or Bidirectional Read
831 * Expected Data Transfer Length are 0"
833 * For this case, go ahead and clear the unnecssary bits
834 * to avoid any confusion with ->data_direction.
836 hdr
->flags
&= ~ISCSI_FLAG_CMD_READ
;
837 hdr
->flags
&= ~ISCSI_FLAG_CMD_WRITE
;
839 pr_warn("ISCSI_FLAG_CMD_READ or ISCSI_FLAG_CMD_WRITE"
840 " set when Expected Data Transfer Length is 0 for"
841 " CDB: 0x%02x, Fixing up flags\n", hdr
->cdb
[0]);
844 if (!(hdr
->flags
& ISCSI_FLAG_CMD_READ
) &&
845 !(hdr
->flags
& ISCSI_FLAG_CMD_WRITE
) && (hdr
->data_length
!= 0)) {
846 pr_err("ISCSI_FLAG_CMD_READ and/or ISCSI_FLAG_CMD_WRITE"
847 " MUST be set if Expected Data Transfer Length is not 0."
848 " Bad iSCSI Initiator\n");
849 return iscsit_add_reject_cmd(cmd
,
850 ISCSI_REASON_BOOKMARK_INVALID
, buf
);
853 if ((hdr
->flags
& ISCSI_FLAG_CMD_READ
) &&
854 (hdr
->flags
& ISCSI_FLAG_CMD_WRITE
)) {
855 pr_err("Bidirectional operations not supported!\n");
856 return iscsit_add_reject_cmd(cmd
,
857 ISCSI_REASON_BOOKMARK_INVALID
, buf
);
860 if (hdr
->opcode
& ISCSI_OP_IMMEDIATE
) {
861 pr_err("Illegally set Immediate Bit in iSCSI Initiator"
862 " Scsi Command PDU.\n");
863 return iscsit_add_reject_cmd(cmd
,
864 ISCSI_REASON_BOOKMARK_INVALID
, buf
);
867 if (payload_length
&& !conn
->sess
->sess_ops
->ImmediateData
) {
868 pr_err("ImmediateData=No but DataSegmentLength=%u,"
869 " protocol error.\n", payload_length
);
870 return iscsit_add_reject_cmd(cmd
,
871 ISCSI_REASON_PROTOCOL_ERROR
, buf
);
874 if ((be32_to_cpu(hdr
->data_length
) == payload_length
) &&
875 (!(hdr
->flags
& ISCSI_FLAG_CMD_FINAL
))) {
876 pr_err("Expected Data Transfer Length and Length of"
877 " Immediate Data are the same, but ISCSI_FLAG_CMD_FINAL"
878 " bit is not set protocol error\n");
879 return iscsit_add_reject_cmd(cmd
,
880 ISCSI_REASON_PROTOCOL_ERROR
, buf
);
883 if (payload_length
> be32_to_cpu(hdr
->data_length
)) {
884 pr_err("DataSegmentLength: %u is greater than"
885 " EDTL: %u, protocol error.\n", payload_length
,
887 return iscsit_add_reject_cmd(cmd
,
888 ISCSI_REASON_PROTOCOL_ERROR
, buf
);
891 if (payload_length
> conn
->conn_ops
->MaxXmitDataSegmentLength
) {
892 pr_err("DataSegmentLength: %u is greater than"
893 " MaxXmitDataSegmentLength: %u, protocol error.\n",
894 payload_length
, conn
->conn_ops
->MaxXmitDataSegmentLength
);
895 return iscsit_add_reject_cmd(cmd
,
896 ISCSI_REASON_PROTOCOL_ERROR
, buf
);
899 if (payload_length
> conn
->sess
->sess_ops
->FirstBurstLength
) {
900 pr_err("DataSegmentLength: %u is greater than"
901 " FirstBurstLength: %u, protocol error.\n",
902 payload_length
, conn
->sess
->sess_ops
->FirstBurstLength
);
903 return iscsit_add_reject_cmd(cmd
,
904 ISCSI_REASON_BOOKMARK_INVALID
, buf
);
907 data_direction
= (hdr
->flags
& ISCSI_FLAG_CMD_WRITE
) ? DMA_TO_DEVICE
:
908 (hdr
->flags
& ISCSI_FLAG_CMD_READ
) ? DMA_FROM_DEVICE
:
911 cmd
->data_direction
= data_direction
;
912 iscsi_task_attr
= hdr
->flags
& ISCSI_FLAG_CMD_ATTR_MASK
;
914 * Figure out the SAM Task Attribute for the incoming SCSI CDB
916 if ((iscsi_task_attr
== ISCSI_ATTR_UNTAGGED
) ||
917 (iscsi_task_attr
== ISCSI_ATTR_SIMPLE
))
918 sam_task_attr
= MSG_SIMPLE_TAG
;
919 else if (iscsi_task_attr
== ISCSI_ATTR_ORDERED
)
920 sam_task_attr
= MSG_ORDERED_TAG
;
921 else if (iscsi_task_attr
== ISCSI_ATTR_HEAD_OF_QUEUE
)
922 sam_task_attr
= MSG_HEAD_TAG
;
923 else if (iscsi_task_attr
== ISCSI_ATTR_ACA
)
924 sam_task_attr
= MSG_ACA_TAG
;
926 pr_debug("Unknown iSCSI Task Attribute: 0x%02x, using"
927 " MSG_SIMPLE_TAG\n", iscsi_task_attr
);
928 sam_task_attr
= MSG_SIMPLE_TAG
;
931 cmd
->iscsi_opcode
= ISCSI_OP_SCSI_CMD
;
932 cmd
->i_state
= ISTATE_NEW_CMD
;
933 cmd
->immediate_cmd
= ((hdr
->opcode
& ISCSI_OP_IMMEDIATE
) ? 1 : 0);
934 cmd
->immediate_data
= (payload_length
) ? 1 : 0;
935 cmd
->unsolicited_data
= ((!(hdr
->flags
& ISCSI_FLAG_CMD_FINAL
) &&
936 (hdr
->flags
& ISCSI_FLAG_CMD_WRITE
)) ? 1 : 0);
937 if (cmd
->unsolicited_data
)
938 cmd
->cmd_flags
|= ICF_NON_IMMEDIATE_UNSOLICITED_DATA
;
940 conn
->sess
->init_task_tag
= cmd
->init_task_tag
= hdr
->itt
;
941 if (hdr
->flags
& ISCSI_FLAG_CMD_READ
) {
942 spin_lock_bh(&conn
->sess
->ttt_lock
);
943 cmd
->targ_xfer_tag
= conn
->sess
->targ_xfer_tag
++;
944 if (cmd
->targ_xfer_tag
== 0xFFFFFFFF)
945 cmd
->targ_xfer_tag
= conn
->sess
->targ_xfer_tag
++;
946 spin_unlock_bh(&conn
->sess
->ttt_lock
);
947 } else if (hdr
->flags
& ISCSI_FLAG_CMD_WRITE
)
948 cmd
->targ_xfer_tag
= 0xFFFFFFFF;
949 cmd
->cmd_sn
= be32_to_cpu(hdr
->cmdsn
);
950 cmd
->exp_stat_sn
= be32_to_cpu(hdr
->exp_statsn
);
951 cmd
->first_burst_len
= payload_length
;
953 if (!conn
->sess
->sess_ops
->RDMAExtensions
&&
954 cmd
->data_direction
== DMA_FROM_DEVICE
) {
955 struct iscsi_datain_req
*dr
;
957 dr
= iscsit_allocate_datain_req();
959 return iscsit_add_reject_cmd(cmd
,
960 ISCSI_REASON_BOOKMARK_NO_RESOURCES
, buf
);
962 iscsit_attach_datain_req(cmd
, dr
);
966 * Initialize struct se_cmd descriptor from target_core_mod infrastructure
968 transport_init_se_cmd(&cmd
->se_cmd
, &lio_target_fabric_configfs
->tf_ops
,
969 conn
->sess
->se_sess
, be32_to_cpu(hdr
->data_length
),
970 cmd
->data_direction
, sam_task_attr
,
971 cmd
->sense_buffer
+ 2);
973 pr_debug("Got SCSI Command, ITT: 0x%08x, CmdSN: 0x%08x,"
974 " ExpXferLen: %u, Length: %u, CID: %hu\n", hdr
->itt
,
975 hdr
->cmdsn
, be32_to_cpu(hdr
->data_length
), payload_length
,
978 target_get_sess_cmd(conn
->sess
->se_sess
, &cmd
->se_cmd
, true);
980 cmd
->sense_reason
= transport_lookup_cmd_lun(&cmd
->se_cmd
,
981 scsilun_to_int(&hdr
->lun
));
982 if (cmd
->sense_reason
)
985 cmd
->sense_reason
= target_setup_cmd_from_cdb(&cmd
->se_cmd
, hdr
->cdb
);
986 if (cmd
->sense_reason
) {
987 if (cmd
->sense_reason
== TCM_OUT_OF_RESOURCES
) {
988 return iscsit_add_reject_cmd(cmd
,
989 ISCSI_REASON_BOOKMARK_NO_RESOURCES
, buf
);
995 if (iscsit_build_pdu_and_seq_lists(cmd
, payload_length
) < 0) {
996 return iscsit_add_reject_cmd(cmd
,
997 ISCSI_REASON_BOOKMARK_NO_RESOURCES
, buf
);
1001 spin_lock_bh(&conn
->cmd_lock
);
1002 list_add_tail(&cmd
->i_conn_node
, &conn
->conn_cmd_list
);
1003 spin_unlock_bh(&conn
->cmd_lock
);
1005 * Check if we need to delay processing because of ALUA
1006 * Active/NonOptimized primary access state..
1008 core_alua_check_nonop_delay(&cmd
->se_cmd
);
1012 EXPORT_SYMBOL(iscsit_setup_scsi_cmd
);
1014 void iscsit_set_unsoliticed_dataout(struct iscsi_cmd
*cmd
)
1016 iscsit_set_dataout_sequence_values(cmd
);
1018 spin_lock_bh(&cmd
->dataout_timeout_lock
);
1019 iscsit_start_dataout_timer(cmd
, cmd
->conn
);
1020 spin_unlock_bh(&cmd
->dataout_timeout_lock
);
1022 EXPORT_SYMBOL(iscsit_set_unsoliticed_dataout
);
1024 int iscsit_process_scsi_cmd(struct iscsi_conn
*conn
, struct iscsi_cmd
*cmd
,
1025 struct iscsi_scsi_req
*hdr
)
1029 * Check the CmdSN against ExpCmdSN/MaxCmdSN here if
1030 * the Immediate Bit is not set, and no Immediate
1033 * A PDU/CmdSN carrying Immediate Data can only
1034 * be processed after the DataCRC has passed.
1035 * If the DataCRC fails, the CmdSN MUST NOT
1036 * be acknowledged. (See below)
1038 if (!cmd
->immediate_data
) {
1039 cmdsn_ret
= iscsit_sequence_cmd(conn
, cmd
,
1040 (unsigned char *)hdr
, hdr
->cmdsn
);
1041 if (cmdsn_ret
== CMDSN_ERROR_CANNOT_RECOVER
)
1043 else if (cmdsn_ret
== CMDSN_LOWER_THAN_EXP
) {
1044 target_put_sess_cmd(conn
->sess
->se_sess
, &cmd
->se_cmd
);
1049 iscsit_ack_from_expstatsn(conn
, be32_to_cpu(hdr
->exp_statsn
));
1052 * If no Immediate Data is attached, it's OK to return now.
1054 if (!cmd
->immediate_data
) {
1055 if (!cmd
->sense_reason
&& cmd
->unsolicited_data
)
1056 iscsit_set_unsoliticed_dataout(cmd
);
1057 if (!cmd
->sense_reason
)
1060 target_put_sess_cmd(conn
->sess
->se_sess
, &cmd
->se_cmd
);
1065 * Early CHECK_CONDITIONs with ImmediateData never make it to command
1066 * execution. These exceptions are processed in CmdSN order using
1067 * iscsit_check_received_cmdsn() in iscsit_get_immediate_data() below.
1069 if (cmd
->sense_reason
) {
1070 if (cmd
->reject_reason
)
1076 * Call directly into transport_generic_new_cmd() to perform
1077 * the backend memory allocation.
1079 cmd
->sense_reason
= transport_generic_new_cmd(&cmd
->se_cmd
);
1080 if (cmd
->sense_reason
)
1085 EXPORT_SYMBOL(iscsit_process_scsi_cmd
);
1088 iscsit_get_immediate_data(struct iscsi_cmd
*cmd
, struct iscsi_scsi_req
*hdr
,
1091 struct iscsi_conn
*conn
= cmd
->conn
;
1092 int cmdsn_ret
= 0, immed_ret
= IMMEDIATE_DATA_NORMAL_OPERATION
;
1094 * Special case for Unsupported SAM WRITE Opcodes and ImmediateData=Yes.
1096 if (dump_payload
== true)
1097 goto after_immediate_data
;
1099 immed_ret
= iscsit_handle_immediate_data(cmd
, hdr
,
1100 cmd
->first_burst_len
);
1101 after_immediate_data
:
1102 if (immed_ret
== IMMEDIATE_DATA_NORMAL_OPERATION
) {
1104 * A PDU/CmdSN carrying Immediate Data passed
1105 * DataCRC, check against ExpCmdSN/MaxCmdSN if
1106 * Immediate Bit is not set.
1108 cmdsn_ret
= iscsit_sequence_cmd(cmd
->conn
, cmd
,
1109 (unsigned char *)hdr
, hdr
->cmdsn
);
1110 if (cmdsn_ret
== CMDSN_ERROR_CANNOT_RECOVER
)
1113 if (cmd
->sense_reason
|| cmdsn_ret
== CMDSN_LOWER_THAN_EXP
) {
1116 rc
= iscsit_dump_data_payload(cmd
->conn
,
1117 cmd
->first_burst_len
, 1);
1118 target_put_sess_cmd(conn
->sess
->se_sess
, &cmd
->se_cmd
);
1120 } else if (cmd
->unsolicited_data
)
1121 iscsit_set_unsoliticed_dataout(cmd
);
1123 } else if (immed_ret
== IMMEDIATE_DATA_ERL1_CRC_FAILURE
) {
1125 * Immediate Data failed DataCRC and ERL>=1,
1126 * silently drop this PDU and let the initiator
1127 * plug the CmdSN gap.
1129 * FIXME: Send Unsolicited NOPIN with reserved
1130 * TTT here to help the initiator figure out
1131 * the missing CmdSN, although they should be
1132 * intelligent enough to determine the missing
1133 * CmdSN and issue a retry to plug the sequence.
1135 cmd
->i_state
= ISTATE_REMOVE
;
1136 iscsit_add_cmd_to_immediate_queue(cmd
, cmd
->conn
, cmd
->i_state
);
1137 } else /* immed_ret == IMMEDIATE_DATA_CANNOT_RECOVER */
1144 iscsit_handle_scsi_cmd(struct iscsi_conn
*conn
, struct iscsi_cmd
*cmd
,
1147 struct iscsi_scsi_req
*hdr
= (struct iscsi_scsi_req
*)buf
;
1149 bool dump_payload
= false;
1151 rc
= iscsit_setup_scsi_cmd(conn
, cmd
, buf
);
1155 * Allocation iovecs needed for struct socket operations for
1156 * traditional iSCSI block I/O.
1158 if (iscsit_allocate_iovecs(cmd
) < 0) {
1159 return iscsit_add_reject_cmd(cmd
,
1160 ISCSI_REASON_BOOKMARK_NO_RESOURCES
, buf
);
1162 immed_data
= cmd
->immediate_data
;
1164 rc
= iscsit_process_scsi_cmd(conn
, cmd
, hdr
);
1168 dump_payload
= true;
1173 return iscsit_get_immediate_data(cmd
, hdr
, dump_payload
);
1176 static u32
iscsit_do_crypto_hash_sg(
1177 struct hash_desc
*hash
,
1178 struct iscsi_cmd
*cmd
,
1186 struct scatterlist
*sg
;
1187 unsigned int page_off
;
1189 crypto_hash_init(hash
);
1191 sg
= cmd
->first_data_sg
;
1192 page_off
= cmd
->first_data_sg_off
;
1195 while (data_length
) {
1196 u32 cur_len
= min_t(u32
, data_length
, (sg
[i
].length
- page_off
));
1198 crypto_hash_update(hash
, &sg
[i
], cur_len
);
1200 data_length
-= cur_len
;
1206 struct scatterlist pad_sg
;
1208 sg_init_one(&pad_sg
, pad_bytes
, padding
);
1209 crypto_hash_update(hash
, &pad_sg
, padding
);
1211 crypto_hash_final(hash
, (u8
*) &data_crc
);
1216 static void iscsit_do_crypto_hash_buf(
1217 struct hash_desc
*hash
,
1224 struct scatterlist sg
;
1226 crypto_hash_init(hash
);
1228 sg_init_one(&sg
, buf
, payload_length
);
1229 crypto_hash_update(hash
, &sg
, payload_length
);
1232 sg_init_one(&sg
, pad_bytes
, padding
);
1233 crypto_hash_update(hash
, &sg
, padding
);
1235 crypto_hash_final(hash
, data_crc
);
1239 iscsit_check_dataout_hdr(struct iscsi_conn
*conn
, unsigned char *buf
,
1240 struct iscsi_cmd
**out_cmd
)
1242 struct iscsi_data
*hdr
= (struct iscsi_data
*)buf
;
1243 struct iscsi_cmd
*cmd
= NULL
;
1244 struct se_cmd
*se_cmd
;
1245 u32 payload_length
= ntoh24(hdr
->dlength
);
1248 if (!payload_length
) {
1249 pr_warn("DataOUT payload is ZERO, ignoring.\n");
1254 atomic_long_add(payload_length
, &conn
->sess
->rx_data_octets
);
1256 if (payload_length
> conn
->conn_ops
->MaxXmitDataSegmentLength
) {
1257 pr_err("DataSegmentLength: %u is greater than"
1258 " MaxXmitDataSegmentLength: %u\n", payload_length
,
1259 conn
->conn_ops
->MaxXmitDataSegmentLength
);
1260 return iscsit_add_reject(conn
, ISCSI_REASON_PROTOCOL_ERROR
,
1264 cmd
= iscsit_find_cmd_from_itt_or_dump(conn
, hdr
->itt
,
1269 pr_debug("Got DataOut ITT: 0x%08x, TTT: 0x%08x,"
1270 " DataSN: 0x%08x, Offset: %u, Length: %u, CID: %hu\n",
1271 hdr
->itt
, hdr
->ttt
, hdr
->datasn
, ntohl(hdr
->offset
),
1272 payload_length
, conn
->cid
);
1274 if (cmd
->cmd_flags
& ICF_GOT_LAST_DATAOUT
) {
1275 pr_err("Command ITT: 0x%08x received DataOUT after"
1276 " last DataOUT received, dumping payload\n",
1277 cmd
->init_task_tag
);
1278 return iscsit_dump_data_payload(conn
, payload_length
, 1);
1281 if (cmd
->data_direction
!= DMA_TO_DEVICE
) {
1282 pr_err("Command ITT: 0x%08x received DataOUT for a"
1283 " NON-WRITE command.\n", cmd
->init_task_tag
);
1284 return iscsit_reject_cmd(cmd
, ISCSI_REASON_PROTOCOL_ERROR
, buf
);
1286 se_cmd
= &cmd
->se_cmd
;
1287 iscsit_mod_dataout_timer(cmd
);
1289 if ((be32_to_cpu(hdr
->offset
) + payload_length
) > cmd
->se_cmd
.data_length
) {
1290 pr_err("DataOut Offset: %u, Length %u greater than"
1291 " iSCSI Command EDTL %u, protocol error.\n",
1292 hdr
->offset
, payload_length
, cmd
->se_cmd
.data_length
);
1293 return iscsit_reject_cmd(cmd
, ISCSI_REASON_BOOKMARK_INVALID
, buf
);
1296 if (cmd
->unsolicited_data
) {
1297 int dump_unsolicited_data
= 0;
1299 if (conn
->sess
->sess_ops
->InitialR2T
) {
1300 pr_err("Received unexpected unsolicited data"
1301 " while InitialR2T=Yes, protocol error.\n");
1302 transport_send_check_condition_and_sense(&cmd
->se_cmd
,
1303 TCM_UNEXPECTED_UNSOLICITED_DATA
, 0);
1307 * Special case for dealing with Unsolicited DataOUT
1308 * and Unsupported SAM WRITE Opcodes and SE resource allocation
1312 /* Something's amiss if we're not in WRITE_PENDING state... */
1313 WARN_ON(se_cmd
->t_state
!= TRANSPORT_WRITE_PENDING
);
1314 if (!(se_cmd
->se_cmd_flags
& SCF_SUPPORTED_SAM_OPCODE
))
1315 dump_unsolicited_data
= 1;
1317 if (dump_unsolicited_data
) {
1319 * Check if a delayed TASK_ABORTED status needs to
1320 * be sent now if the ISCSI_FLAG_CMD_FINAL has been
1321 * received with the unsolicitied data out.
1323 if (hdr
->flags
& ISCSI_FLAG_CMD_FINAL
)
1324 iscsit_stop_dataout_timer(cmd
);
1326 transport_check_aborted_status(se_cmd
,
1327 (hdr
->flags
& ISCSI_FLAG_CMD_FINAL
));
1328 return iscsit_dump_data_payload(conn
, payload_length
, 1);
1332 * For the normal solicited data path:
1334 * Check for a delayed TASK_ABORTED status and dump any
1335 * incoming data out payload if one exists. Also, when the
1336 * ISCSI_FLAG_CMD_FINAL is set to denote the end of the current
1337 * data out sequence, we decrement outstanding_r2ts. Once
1338 * outstanding_r2ts reaches zero, go ahead and send the delayed
1339 * TASK_ABORTED status.
1341 if (se_cmd
->transport_state
& CMD_T_ABORTED
) {
1342 if (hdr
->flags
& ISCSI_FLAG_CMD_FINAL
)
1343 if (--cmd
->outstanding_r2ts
< 1) {
1344 iscsit_stop_dataout_timer(cmd
);
1345 transport_check_aborted_status(
1349 return iscsit_dump_data_payload(conn
, payload_length
, 1);
1353 * Preform DataSN, DataSequenceInOrder, DataPDUInOrder, and
1354 * within-command recovery checks before receiving the payload.
1356 rc
= iscsit_check_pre_dataout(cmd
, buf
);
1357 if (rc
== DATAOUT_WITHIN_COMMAND_RECOVERY
)
1359 else if (rc
== DATAOUT_CANNOT_RECOVER
)
1365 EXPORT_SYMBOL(iscsit_check_dataout_hdr
);
1368 iscsit_get_dataout(struct iscsi_conn
*conn
, struct iscsi_cmd
*cmd
,
1369 struct iscsi_data
*hdr
)
1372 u32 checksum
, iov_count
= 0, padding
= 0, rx_got
= 0, rx_size
= 0;
1373 u32 payload_length
= ntoh24(hdr
->dlength
);
1374 int iov_ret
, data_crc_failed
= 0;
1376 rx_size
+= payload_length
;
1377 iov
= &cmd
->iov_data
[0];
1379 iov_ret
= iscsit_map_iovec(cmd
, iov
, be32_to_cpu(hdr
->offset
),
1384 iov_count
+= iov_ret
;
1386 padding
= ((-payload_length
) & 3);
1388 iov
[iov_count
].iov_base
= cmd
->pad_bytes
;
1389 iov
[iov_count
++].iov_len
= padding
;
1391 pr_debug("Receiving %u padding bytes.\n", padding
);
1394 if (conn
->conn_ops
->DataDigest
) {
1395 iov
[iov_count
].iov_base
= &checksum
;
1396 iov
[iov_count
++].iov_len
= ISCSI_CRC_LEN
;
1397 rx_size
+= ISCSI_CRC_LEN
;
1400 rx_got
= rx_data(conn
, &cmd
->iov_data
[0], iov_count
, rx_size
);
1402 iscsit_unmap_iovec(cmd
);
1404 if (rx_got
!= rx_size
)
1407 if (conn
->conn_ops
->DataDigest
) {
1410 data_crc
= iscsit_do_crypto_hash_sg(&conn
->conn_rx_hash
, cmd
,
1411 be32_to_cpu(hdr
->offset
),
1412 payload_length
, padding
,
1415 if (checksum
!= data_crc
) {
1416 pr_err("ITT: 0x%08x, Offset: %u, Length: %u,"
1417 " DataSN: 0x%08x, CRC32C DataDigest 0x%08x"
1418 " does not match computed 0x%08x\n",
1419 hdr
->itt
, hdr
->offset
, payload_length
,
1420 hdr
->datasn
, checksum
, data_crc
);
1421 data_crc_failed
= 1;
1423 pr_debug("Got CRC32C DataDigest 0x%08x for"
1424 " %u bytes of Data Out\n", checksum
,
1429 return data_crc_failed
;
1433 iscsit_check_dataout_payload(struct iscsi_cmd
*cmd
, struct iscsi_data
*hdr
,
1434 bool data_crc_failed
)
1436 struct iscsi_conn
*conn
= cmd
->conn
;
1439 * Increment post receive data and CRC values or perform
1440 * within-command recovery.
1442 rc
= iscsit_check_post_dataout(cmd
, (unsigned char *)hdr
, data_crc_failed
);
1443 if ((rc
== DATAOUT_NORMAL
) || (rc
== DATAOUT_WITHIN_COMMAND_RECOVERY
))
1445 else if (rc
== DATAOUT_SEND_R2T
) {
1446 iscsit_set_dataout_sequence_values(cmd
);
1447 conn
->conn_transport
->iscsit_get_dataout(conn
, cmd
, false);
1448 } else if (rc
== DATAOUT_SEND_TO_TRANSPORT
) {
1450 * Handle extra special case for out of order
1451 * Unsolicited Data Out.
1453 spin_lock_bh(&cmd
->istate_lock
);
1454 ooo_cmdsn
= (cmd
->cmd_flags
& ICF_OOO_CMDSN
);
1455 cmd
->cmd_flags
|= ICF_GOT_LAST_DATAOUT
;
1456 cmd
->i_state
= ISTATE_RECEIVED_LAST_DATAOUT
;
1457 spin_unlock_bh(&cmd
->istate_lock
);
1459 iscsit_stop_dataout_timer(cmd
);
1462 target_execute_cmd(&cmd
->se_cmd
);
1464 } else /* DATAOUT_CANNOT_RECOVER */
1469 EXPORT_SYMBOL(iscsit_check_dataout_payload
);
1471 static int iscsit_handle_data_out(struct iscsi_conn
*conn
, unsigned char *buf
)
1473 struct iscsi_cmd
*cmd
= NULL
;
1474 struct iscsi_data
*hdr
= (struct iscsi_data
*)buf
;
1476 bool data_crc_failed
= false;
1478 rc
= iscsit_check_dataout_hdr(conn
, buf
, &cmd
);
1484 rc
= iscsit_get_dataout(conn
, cmd
, hdr
);
1488 data_crc_failed
= true;
1490 return iscsit_check_dataout_payload(cmd
, hdr
, data_crc_failed
);
1493 int iscsit_setup_nop_out(struct iscsi_conn
*conn
, struct iscsi_cmd
*cmd
,
1494 struct iscsi_nopout
*hdr
)
1496 u32 payload_length
= ntoh24(hdr
->dlength
);
1498 if (hdr
->itt
== RESERVED_ITT
&& !(hdr
->opcode
& ISCSI_OP_IMMEDIATE
)) {
1499 pr_err("NOPOUT ITT is reserved, but Immediate Bit is"
1500 " not set, protocol error.\n");
1502 return iscsit_add_reject(conn
, ISCSI_REASON_PROTOCOL_ERROR
,
1503 (unsigned char *)hdr
);
1505 return iscsit_reject_cmd(cmd
, ISCSI_REASON_PROTOCOL_ERROR
,
1506 (unsigned char *)hdr
);
1509 if (payload_length
> conn
->conn_ops
->MaxXmitDataSegmentLength
) {
1510 pr_err("NOPOUT Ping Data DataSegmentLength: %u is"
1511 " greater than MaxXmitDataSegmentLength: %u, protocol"
1512 " error.\n", payload_length
,
1513 conn
->conn_ops
->MaxXmitDataSegmentLength
);
1515 return iscsit_add_reject(conn
, ISCSI_REASON_PROTOCOL_ERROR
,
1516 (unsigned char *)hdr
);
1518 return iscsit_reject_cmd(cmd
, ISCSI_REASON_PROTOCOL_ERROR
,
1519 (unsigned char *)hdr
);
1522 pr_debug("Got NOPOUT Ping %s ITT: 0x%08x, TTT: 0x%08x,"
1523 " CmdSN: 0x%08x, ExpStatSN: 0x%08x, Length: %u\n",
1524 hdr
->itt
== RESERVED_ITT
? "Response" : "Request",
1525 hdr
->itt
, hdr
->ttt
, hdr
->cmdsn
, hdr
->exp_statsn
,
1528 * This is not a response to a Unsolicited NopIN, which means
1529 * it can either be a NOPOUT ping request (with a valid ITT),
1530 * or a NOPOUT not requesting a NOPIN (with a reserved ITT).
1531 * Either way, make sure we allocate an struct iscsi_cmd, as both
1532 * can contain ping data.
1534 if (hdr
->ttt
== cpu_to_be32(0xFFFFFFFF)) {
1535 cmd
->iscsi_opcode
= ISCSI_OP_NOOP_OUT
;
1536 cmd
->i_state
= ISTATE_SEND_NOPIN
;
1537 cmd
->immediate_cmd
= ((hdr
->opcode
& ISCSI_OP_IMMEDIATE
) ?
1539 conn
->sess
->init_task_tag
= cmd
->init_task_tag
= hdr
->itt
;
1540 cmd
->targ_xfer_tag
= 0xFFFFFFFF;
1541 cmd
->cmd_sn
= be32_to_cpu(hdr
->cmdsn
);
1542 cmd
->exp_stat_sn
= be32_to_cpu(hdr
->exp_statsn
);
1543 cmd
->data_direction
= DMA_NONE
;
1548 EXPORT_SYMBOL(iscsit_setup_nop_out
);
1550 int iscsit_process_nop_out(struct iscsi_conn
*conn
, struct iscsi_cmd
*cmd
,
1551 struct iscsi_nopout
*hdr
)
1553 struct iscsi_cmd
*cmd_p
= NULL
;
1556 * Initiator is expecting a NopIN ping reply..
1558 if (hdr
->itt
!= RESERVED_ITT
) {
1561 spin_lock_bh(&conn
->cmd_lock
);
1562 list_add_tail(&cmd
->i_conn_node
, &conn
->conn_cmd_list
);
1563 spin_unlock_bh(&conn
->cmd_lock
);
1565 iscsit_ack_from_expstatsn(conn
, be32_to_cpu(hdr
->exp_statsn
));
1567 if (hdr
->opcode
& ISCSI_OP_IMMEDIATE
) {
1568 iscsit_add_cmd_to_response_queue(cmd
, conn
,
1573 cmdsn_ret
= iscsit_sequence_cmd(conn
, cmd
,
1574 (unsigned char *)hdr
, hdr
->cmdsn
);
1575 if (cmdsn_ret
== CMDSN_LOWER_THAN_EXP
)
1577 if (cmdsn_ret
== CMDSN_ERROR_CANNOT_RECOVER
)
1583 * This was a response to a unsolicited NOPIN ping.
1585 if (hdr
->ttt
!= cpu_to_be32(0xFFFFFFFF)) {
1586 cmd_p
= iscsit_find_cmd_from_ttt(conn
, be32_to_cpu(hdr
->ttt
));
1590 iscsit_stop_nopin_response_timer(conn
);
1592 cmd_p
->i_state
= ISTATE_REMOVE
;
1593 iscsit_add_cmd_to_immediate_queue(cmd_p
, conn
, cmd_p
->i_state
);
1595 iscsit_start_nopin_timer(conn
);
1599 * Otherwise, initiator is not expecting a NOPIN is response.
1600 * Just ignore for now.
1604 EXPORT_SYMBOL(iscsit_process_nop_out
);
1606 static int iscsit_handle_nop_out(struct iscsi_conn
*conn
, struct iscsi_cmd
*cmd
,
1609 unsigned char *ping_data
= NULL
;
1610 struct iscsi_nopout
*hdr
= (struct iscsi_nopout
*)buf
;
1611 struct kvec
*iov
= NULL
;
1612 u32 payload_length
= ntoh24(hdr
->dlength
);
1615 ret
= iscsit_setup_nop_out(conn
, cmd
, hdr
);
1619 * Handle NOP-OUT payload for traditional iSCSI sockets
1621 if (payload_length
&& hdr
->ttt
== cpu_to_be32(0xFFFFFFFF)) {
1622 u32 checksum
, data_crc
, padding
= 0;
1623 int niov
= 0, rx_got
, rx_size
= payload_length
;
1625 ping_data
= kzalloc(payload_length
+ 1, GFP_KERNEL
);
1627 pr_err("Unable to allocate memory for"
1628 " NOPOUT ping data.\n");
1633 iov
= &cmd
->iov_misc
[0];
1634 iov
[niov
].iov_base
= ping_data
;
1635 iov
[niov
++].iov_len
= payload_length
;
1637 padding
= ((-payload_length
) & 3);
1639 pr_debug("Receiving %u additional bytes"
1640 " for padding.\n", padding
);
1641 iov
[niov
].iov_base
= &cmd
->pad_bytes
;
1642 iov
[niov
++].iov_len
= padding
;
1645 if (conn
->conn_ops
->DataDigest
) {
1646 iov
[niov
].iov_base
= &checksum
;
1647 iov
[niov
++].iov_len
= ISCSI_CRC_LEN
;
1648 rx_size
+= ISCSI_CRC_LEN
;
1651 rx_got
= rx_data(conn
, &cmd
->iov_misc
[0], niov
, rx_size
);
1652 if (rx_got
!= rx_size
) {
1657 if (conn
->conn_ops
->DataDigest
) {
1658 iscsit_do_crypto_hash_buf(&conn
->conn_rx_hash
,
1659 ping_data
, payload_length
,
1660 padding
, cmd
->pad_bytes
,
1663 if (checksum
!= data_crc
) {
1664 pr_err("Ping data CRC32C DataDigest"
1665 " 0x%08x does not match computed 0x%08x\n",
1666 checksum
, data_crc
);
1667 if (!conn
->sess
->sess_ops
->ErrorRecoveryLevel
) {
1668 pr_err("Unable to recover from"
1669 " NOPOUT Ping DataCRC failure while in"
1675 * Silently drop this PDU and let the
1676 * initiator plug the CmdSN gap.
1678 pr_debug("Dropping NOPOUT"
1679 " Command CmdSN: 0x%08x due to"
1680 " DataCRC error.\n", hdr
->cmdsn
);
1685 pr_debug("Got CRC32C DataDigest"
1686 " 0x%08x for %u bytes of ping data.\n",
1687 checksum
, payload_length
);
1691 ping_data
[payload_length
] = '\0';
1693 * Attach ping data to struct iscsi_cmd->buf_ptr.
1695 cmd
->buf_ptr
= ping_data
;
1696 cmd
->buf_ptr_size
= payload_length
;
1698 pr_debug("Got %u bytes of NOPOUT ping"
1699 " data.\n", payload_length
);
1700 pr_debug("Ping Data: \"%s\"\n", ping_data
);
1703 return iscsit_process_nop_out(conn
, cmd
, hdr
);
1706 iscsit_free_cmd(cmd
, false);
1713 iscsit_handle_task_mgt_cmd(struct iscsi_conn
*conn
, struct iscsi_cmd
*cmd
,
1716 struct se_tmr_req
*se_tmr
;
1717 struct iscsi_tmr_req
*tmr_req
;
1718 struct iscsi_tm
*hdr
;
1719 int out_of_order_cmdsn
= 0, ret
;
1720 bool sess_ref
= false;
1723 hdr
= (struct iscsi_tm
*) buf
;
1724 hdr
->flags
&= ~ISCSI_FLAG_CMD_FINAL
;
1725 function
= hdr
->flags
;
1727 pr_debug("Got Task Management Request ITT: 0x%08x, CmdSN:"
1728 " 0x%08x, Function: 0x%02x, RefTaskTag: 0x%08x, RefCmdSN:"
1729 " 0x%08x, CID: %hu\n", hdr
->itt
, hdr
->cmdsn
, function
,
1730 hdr
->rtt
, hdr
->refcmdsn
, conn
->cid
);
1732 if ((function
!= ISCSI_TM_FUNC_ABORT_TASK
) &&
1733 ((function
!= ISCSI_TM_FUNC_TASK_REASSIGN
) &&
1734 hdr
->rtt
!= RESERVED_ITT
)) {
1735 pr_err("RefTaskTag should be set to 0xFFFFFFFF.\n");
1736 hdr
->rtt
= RESERVED_ITT
;
1739 if ((function
== ISCSI_TM_FUNC_TASK_REASSIGN
) &&
1740 !(hdr
->opcode
& ISCSI_OP_IMMEDIATE
)) {
1741 pr_err("Task Management Request TASK_REASSIGN not"
1742 " issued as immediate command, bad iSCSI Initiator"
1743 "implementation\n");
1744 return iscsit_add_reject_cmd(cmd
,
1745 ISCSI_REASON_PROTOCOL_ERROR
, buf
);
1747 if ((function
!= ISCSI_TM_FUNC_ABORT_TASK
) &&
1748 be32_to_cpu(hdr
->refcmdsn
) != ISCSI_RESERVED_TAG
)
1749 hdr
->refcmdsn
= cpu_to_be32(ISCSI_RESERVED_TAG
);
1751 cmd
->data_direction
= DMA_NONE
;
1753 cmd
->tmr_req
= kzalloc(sizeof(struct iscsi_tmr_req
), GFP_KERNEL
);
1754 if (!cmd
->tmr_req
) {
1755 pr_err("Unable to allocate memory for"
1756 " Task Management command!\n");
1757 return iscsit_add_reject_cmd(cmd
,
1758 ISCSI_REASON_BOOKMARK_NO_RESOURCES
,
1763 * TASK_REASSIGN for ERL=2 / connection stays inside of
1764 * LIO-Target $FABRIC_MOD
1766 if (function
!= ISCSI_TM_FUNC_TASK_REASSIGN
) {
1771 transport_init_se_cmd(&cmd
->se_cmd
,
1772 &lio_target_fabric_configfs
->tf_ops
,
1773 conn
->sess
->se_sess
, 0, DMA_NONE
,
1774 MSG_SIMPLE_TAG
, cmd
->sense_buffer
+ 2);
1776 target_get_sess_cmd(conn
->sess
->se_sess
, &cmd
->se_cmd
, true);
1780 case ISCSI_TM_FUNC_ABORT_TASK
:
1781 tcm_function
= TMR_ABORT_TASK
;
1783 case ISCSI_TM_FUNC_ABORT_TASK_SET
:
1784 tcm_function
= TMR_ABORT_TASK_SET
;
1786 case ISCSI_TM_FUNC_CLEAR_ACA
:
1787 tcm_function
= TMR_CLEAR_ACA
;
1789 case ISCSI_TM_FUNC_CLEAR_TASK_SET
:
1790 tcm_function
= TMR_CLEAR_TASK_SET
;
1792 case ISCSI_TM_FUNC_LOGICAL_UNIT_RESET
:
1793 tcm_function
= TMR_LUN_RESET
;
1795 case ISCSI_TM_FUNC_TARGET_WARM_RESET
:
1796 tcm_function
= TMR_TARGET_WARM_RESET
;
1798 case ISCSI_TM_FUNC_TARGET_COLD_RESET
:
1799 tcm_function
= TMR_TARGET_COLD_RESET
;
1802 pr_err("Unknown iSCSI TMR Function:"
1803 " 0x%02x\n", function
);
1804 return iscsit_add_reject_cmd(cmd
,
1805 ISCSI_REASON_BOOKMARK_NO_RESOURCES
, buf
);
1808 ret
= core_tmr_alloc_req(&cmd
->se_cmd
, cmd
->tmr_req
,
1809 tcm_function
, GFP_KERNEL
);
1811 return iscsit_add_reject_cmd(cmd
,
1812 ISCSI_REASON_BOOKMARK_NO_RESOURCES
, buf
);
1814 cmd
->tmr_req
->se_tmr_req
= cmd
->se_cmd
.se_tmr_req
;
1817 cmd
->iscsi_opcode
= ISCSI_OP_SCSI_TMFUNC
;
1818 cmd
->i_state
= ISTATE_SEND_TASKMGTRSP
;
1819 cmd
->immediate_cmd
= ((hdr
->opcode
& ISCSI_OP_IMMEDIATE
) ? 1 : 0);
1820 cmd
->init_task_tag
= hdr
->itt
;
1821 cmd
->targ_xfer_tag
= 0xFFFFFFFF;
1822 cmd
->cmd_sn
= be32_to_cpu(hdr
->cmdsn
);
1823 cmd
->exp_stat_sn
= be32_to_cpu(hdr
->exp_statsn
);
1824 se_tmr
= cmd
->se_cmd
.se_tmr_req
;
1825 tmr_req
= cmd
->tmr_req
;
1827 * Locate the struct se_lun for all TMRs not related to ERL=2 TASK_REASSIGN
1829 if (function
!= ISCSI_TM_FUNC_TASK_REASSIGN
) {
1830 ret
= transport_lookup_tmr_lun(&cmd
->se_cmd
,
1831 scsilun_to_int(&hdr
->lun
));
1833 se_tmr
->response
= ISCSI_TMF_RSP_NO_LUN
;
1839 case ISCSI_TM_FUNC_ABORT_TASK
:
1840 se_tmr
->response
= iscsit_tmr_abort_task(cmd
, buf
);
1841 if (se_tmr
->response
)
1844 case ISCSI_TM_FUNC_ABORT_TASK_SET
:
1845 case ISCSI_TM_FUNC_CLEAR_ACA
:
1846 case ISCSI_TM_FUNC_CLEAR_TASK_SET
:
1847 case ISCSI_TM_FUNC_LOGICAL_UNIT_RESET
:
1849 case ISCSI_TM_FUNC_TARGET_WARM_RESET
:
1850 if (iscsit_tmr_task_warm_reset(conn
, tmr_req
, buf
) < 0) {
1851 se_tmr
->response
= ISCSI_TMF_RSP_AUTH_FAILED
;
1855 case ISCSI_TM_FUNC_TARGET_COLD_RESET
:
1856 if (iscsit_tmr_task_cold_reset(conn
, tmr_req
, buf
) < 0) {
1857 se_tmr
->response
= ISCSI_TMF_RSP_AUTH_FAILED
;
1861 case ISCSI_TM_FUNC_TASK_REASSIGN
:
1862 se_tmr
->response
= iscsit_tmr_task_reassign(cmd
, buf
);
1864 * Perform sanity checks on the ExpDataSN only if the
1865 * TASK_REASSIGN was successful.
1867 if (se_tmr
->response
)
1870 if (iscsit_check_task_reassign_expdatasn(tmr_req
, conn
) < 0)
1871 return iscsit_add_reject_cmd(cmd
,
1872 ISCSI_REASON_BOOKMARK_INVALID
, buf
);
1875 pr_err("Unknown TMR function: 0x%02x, protocol"
1876 " error.\n", function
);
1877 se_tmr
->response
= ISCSI_TMF_RSP_NOT_SUPPORTED
;
1881 if ((function
!= ISCSI_TM_FUNC_TASK_REASSIGN
) &&
1882 (se_tmr
->response
== ISCSI_TMF_RSP_COMPLETE
))
1883 se_tmr
->call_transport
= 1;
1885 spin_lock_bh(&conn
->cmd_lock
);
1886 list_add_tail(&cmd
->i_conn_node
, &conn
->conn_cmd_list
);
1887 spin_unlock_bh(&conn
->cmd_lock
);
1889 if (!(hdr
->opcode
& ISCSI_OP_IMMEDIATE
)) {
1890 int cmdsn_ret
= iscsit_sequence_cmd(conn
, cmd
, buf
, hdr
->cmdsn
);
1891 if (cmdsn_ret
== CMDSN_HIGHER_THAN_EXP
)
1892 out_of_order_cmdsn
= 1;
1893 else if (cmdsn_ret
== CMDSN_LOWER_THAN_EXP
)
1895 else if (cmdsn_ret
== CMDSN_ERROR_CANNOT_RECOVER
)
1898 iscsit_ack_from_expstatsn(conn
, be32_to_cpu(hdr
->exp_statsn
));
1900 if (out_of_order_cmdsn
|| !(hdr
->opcode
& ISCSI_OP_IMMEDIATE
))
1903 * Found the referenced task, send to transport for processing.
1905 if (se_tmr
->call_transport
)
1906 return transport_generic_handle_tmr(&cmd
->se_cmd
);
1909 * Could not find the referenced LUN, task, or Task Management
1910 * command not authorized or supported. Change state and
1911 * let the tx_thread send the response.
1913 * For connection recovery, this is also the default action for
1914 * TMR TASK_REASSIGN.
1917 pr_debug("Handle TMR, using sess_ref=true check\n");
1918 target_put_sess_cmd(conn
->sess
->se_sess
, &cmd
->se_cmd
);
1921 iscsit_add_cmd_to_response_queue(cmd
, conn
, cmd
->i_state
);
1924 EXPORT_SYMBOL(iscsit_handle_task_mgt_cmd
);
1926 /* #warning FIXME: Support Text Command parameters besides SendTargets */
1928 iscsit_setup_text_cmd(struct iscsi_conn
*conn
, struct iscsi_cmd
*cmd
,
1929 struct iscsi_text
*hdr
)
1931 u32 payload_length
= ntoh24(hdr
->dlength
);
1933 if (payload_length
> conn
->conn_ops
->MaxXmitDataSegmentLength
) {
1934 pr_err("Unable to accept text parameter length: %u"
1935 "greater than MaxXmitDataSegmentLength %u.\n",
1936 payload_length
, conn
->conn_ops
->MaxXmitDataSegmentLength
);
1937 return iscsit_reject_cmd(cmd
, ISCSI_REASON_PROTOCOL_ERROR
,
1938 (unsigned char *)hdr
);
1941 if (!(hdr
->flags
& ISCSI_FLAG_CMD_FINAL
) ||
1942 (hdr
->flags
& ISCSI_FLAG_TEXT_CONTINUE
)) {
1943 pr_err("Multi sequence text commands currently not supported\n");
1944 return iscsit_reject_cmd(cmd
, ISCSI_REASON_CMD_NOT_SUPPORTED
,
1945 (unsigned char *)hdr
);
1948 pr_debug("Got Text Request: ITT: 0x%08x, CmdSN: 0x%08x,"
1949 " ExpStatSN: 0x%08x, Length: %u\n", hdr
->itt
, hdr
->cmdsn
,
1950 hdr
->exp_statsn
, payload_length
);
1952 cmd
->iscsi_opcode
= ISCSI_OP_TEXT
;
1953 cmd
->i_state
= ISTATE_SEND_TEXTRSP
;
1954 cmd
->immediate_cmd
= ((hdr
->opcode
& ISCSI_OP_IMMEDIATE
) ? 1 : 0);
1955 conn
->sess
->init_task_tag
= cmd
->init_task_tag
= hdr
->itt
;
1956 cmd
->targ_xfer_tag
= 0xFFFFFFFF;
1957 cmd
->cmd_sn
= be32_to_cpu(hdr
->cmdsn
);
1958 cmd
->exp_stat_sn
= be32_to_cpu(hdr
->exp_statsn
);
1959 cmd
->data_direction
= DMA_NONE
;
1963 EXPORT_SYMBOL(iscsit_setup_text_cmd
);
1966 iscsit_process_text_cmd(struct iscsi_conn
*conn
, struct iscsi_cmd
*cmd
,
1967 struct iscsi_text
*hdr
)
1969 unsigned char *text_in
= cmd
->text_in_ptr
, *text_ptr
;
1973 pr_err("Unable to locate text_in buffer for sendtargets"
1977 if (strncmp("SendTargets", text_in
, 11) != 0) {
1978 pr_err("Received Text Data that is not"
1979 " SendTargets, cannot continue.\n");
1982 text_ptr
= strchr(text_in
, '=');
1984 pr_err("No \"=\" separator found in Text Data,"
1985 " cannot continue.\n");
1988 if (!strncmp("=All", text_ptr
, 4)) {
1989 cmd
->cmd_flags
|= IFC_SENDTARGETS_ALL
;
1990 } else if (!strncmp("=iqn.", text_ptr
, 5) ||
1991 !strncmp("=eui.", text_ptr
, 5)) {
1992 cmd
->cmd_flags
|= IFC_SENDTARGETS_SINGLE
;
1994 pr_err("Unable to locate valid SendTargets=%s value\n", text_ptr
);
1998 spin_lock_bh(&conn
->cmd_lock
);
1999 list_add_tail(&cmd
->i_conn_node
, &conn
->conn_cmd_list
);
2000 spin_unlock_bh(&conn
->cmd_lock
);
2002 iscsit_ack_from_expstatsn(conn
, be32_to_cpu(hdr
->exp_statsn
));
2004 if (!(hdr
->opcode
& ISCSI_OP_IMMEDIATE
)) {
2005 cmdsn_ret
= iscsit_sequence_cmd(conn
, cmd
,
2006 (unsigned char *)hdr
, hdr
->cmdsn
);
2007 if (cmdsn_ret
== CMDSN_ERROR_CANNOT_RECOVER
)
2013 return iscsit_execute_cmd(cmd
, 0);
2016 return iscsit_reject_cmd(cmd
, ISCSI_REASON_PROTOCOL_ERROR
,
2017 (unsigned char *)hdr
);
2019 EXPORT_SYMBOL(iscsit_process_text_cmd
);
2022 iscsit_handle_text_cmd(struct iscsi_conn
*conn
, struct iscsi_cmd
*cmd
,
2025 struct iscsi_text
*hdr
= (struct iscsi_text
*)buf
;
2026 char *text_in
= NULL
;
2027 u32 payload_length
= ntoh24(hdr
->dlength
);
2030 rc
= iscsit_setup_text_cmd(conn
, cmd
, hdr
);
2034 rx_size
= payload_length
;
2035 if (payload_length
) {
2036 u32 checksum
= 0, data_crc
= 0;
2037 u32 padding
= 0, pad_bytes
= 0;
2038 int niov
= 0, rx_got
;
2041 text_in
= kzalloc(payload_length
, GFP_KERNEL
);
2043 pr_err("Unable to allocate memory for"
2044 " incoming text parameters\n");
2047 cmd
->text_in_ptr
= text_in
;
2049 memset(iov
, 0, 3 * sizeof(struct kvec
));
2050 iov
[niov
].iov_base
= text_in
;
2051 iov
[niov
++].iov_len
= payload_length
;
2053 padding
= ((-payload_length
) & 3);
2055 iov
[niov
].iov_base
= &pad_bytes
;
2056 iov
[niov
++].iov_len
= padding
;
2058 pr_debug("Receiving %u additional bytes"
2059 " for padding.\n", padding
);
2061 if (conn
->conn_ops
->DataDigest
) {
2062 iov
[niov
].iov_base
= &checksum
;
2063 iov
[niov
++].iov_len
= ISCSI_CRC_LEN
;
2064 rx_size
+= ISCSI_CRC_LEN
;
2067 rx_got
= rx_data(conn
, &iov
[0], niov
, rx_size
);
2068 if (rx_got
!= rx_size
)
2071 if (conn
->conn_ops
->DataDigest
) {
2072 iscsit_do_crypto_hash_buf(&conn
->conn_rx_hash
,
2073 text_in
, payload_length
,
2074 padding
, (u8
*)&pad_bytes
,
2077 if (checksum
!= data_crc
) {
2078 pr_err("Text data CRC32C DataDigest"
2079 " 0x%08x does not match computed"
2080 " 0x%08x\n", checksum
, data_crc
);
2081 if (!conn
->sess
->sess_ops
->ErrorRecoveryLevel
) {
2082 pr_err("Unable to recover from"
2083 " Text Data digest failure while in"
2088 * Silently drop this PDU and let the
2089 * initiator plug the CmdSN gap.
2091 pr_debug("Dropping Text"
2092 " Command CmdSN: 0x%08x due to"
2093 " DataCRC error.\n", hdr
->cmdsn
);
2098 pr_debug("Got CRC32C DataDigest"
2099 " 0x%08x for %u bytes of text data.\n",
2100 checksum
, payload_length
);
2103 text_in
[payload_length
- 1] = '\0';
2104 pr_debug("Successfully read %d bytes of text"
2105 " data.\n", payload_length
);
2108 return iscsit_process_text_cmd(conn
, cmd
, hdr
);
2111 kfree(cmd
->text_in_ptr
);
2112 cmd
->text_in_ptr
= NULL
;
2113 return iscsit_reject_cmd(cmd
, ISCSI_REASON_PROTOCOL_ERROR
, buf
);
2115 EXPORT_SYMBOL(iscsit_handle_text_cmd
);
2117 int iscsit_logout_closesession(struct iscsi_cmd
*cmd
, struct iscsi_conn
*conn
)
2119 struct iscsi_conn
*conn_p
;
2120 struct iscsi_session
*sess
= conn
->sess
;
2122 pr_debug("Received logout request CLOSESESSION on CID: %hu"
2123 " for SID: %u.\n", conn
->cid
, conn
->sess
->sid
);
2125 atomic_set(&sess
->session_logout
, 1);
2126 atomic_set(&conn
->conn_logout_remove
, 1);
2127 conn
->conn_logout_reason
= ISCSI_LOGOUT_REASON_CLOSE_SESSION
;
2129 iscsit_inc_conn_usage_count(conn
);
2130 iscsit_inc_session_usage_count(sess
);
2132 spin_lock_bh(&sess
->conn_lock
);
2133 list_for_each_entry(conn_p
, &sess
->sess_conn_list
, conn_list
) {
2134 if (conn_p
->conn_state
!= TARG_CONN_STATE_LOGGED_IN
)
2137 pr_debug("Moving to TARG_CONN_STATE_IN_LOGOUT.\n");
2138 conn_p
->conn_state
= TARG_CONN_STATE_IN_LOGOUT
;
2140 spin_unlock_bh(&sess
->conn_lock
);
2142 iscsit_add_cmd_to_response_queue(cmd
, conn
, cmd
->i_state
);
2147 int iscsit_logout_closeconnection(struct iscsi_cmd
*cmd
, struct iscsi_conn
*conn
)
2149 struct iscsi_conn
*l_conn
;
2150 struct iscsi_session
*sess
= conn
->sess
;
2152 pr_debug("Received logout request CLOSECONNECTION for CID:"
2153 " %hu on CID: %hu.\n", cmd
->logout_cid
, conn
->cid
);
2156 * A Logout Request with a CLOSECONNECTION reason code for a CID
2157 * can arrive on a connection with a differing CID.
2159 if (conn
->cid
== cmd
->logout_cid
) {
2160 spin_lock_bh(&conn
->state_lock
);
2161 pr_debug("Moving to TARG_CONN_STATE_IN_LOGOUT.\n");
2162 conn
->conn_state
= TARG_CONN_STATE_IN_LOGOUT
;
2164 atomic_set(&conn
->conn_logout_remove
, 1);
2165 conn
->conn_logout_reason
= ISCSI_LOGOUT_REASON_CLOSE_CONNECTION
;
2166 iscsit_inc_conn_usage_count(conn
);
2168 spin_unlock_bh(&conn
->state_lock
);
2171 * Handle all different cid CLOSECONNECTION requests in
2172 * iscsit_logout_post_handler_diffcid() as to give enough
2173 * time for any non immediate command's CmdSN to be
2174 * acknowledged on the connection in question.
2176 * Here we simply make sure the CID is still around.
2178 l_conn
= iscsit_get_conn_from_cid(sess
,
2181 cmd
->logout_response
= ISCSI_LOGOUT_CID_NOT_FOUND
;
2182 iscsit_add_cmd_to_response_queue(cmd
, conn
,
2187 iscsit_dec_conn_usage_count(l_conn
);
2190 iscsit_add_cmd_to_response_queue(cmd
, conn
, cmd
->i_state
);
2195 int iscsit_logout_removeconnforrecovery(struct iscsi_cmd
*cmd
, struct iscsi_conn
*conn
)
2197 struct iscsi_session
*sess
= conn
->sess
;
2199 pr_debug("Received explicit REMOVECONNFORRECOVERY logout for"
2200 " CID: %hu on CID: %hu.\n", cmd
->logout_cid
, conn
->cid
);
2202 if (sess
->sess_ops
->ErrorRecoveryLevel
!= 2) {
2203 pr_err("Received Logout Request REMOVECONNFORRECOVERY"
2204 " while ERL!=2.\n");
2205 cmd
->logout_response
= ISCSI_LOGOUT_RECOVERY_UNSUPPORTED
;
2206 iscsit_add_cmd_to_response_queue(cmd
, conn
, cmd
->i_state
);
2210 if (conn
->cid
== cmd
->logout_cid
) {
2211 pr_err("Received Logout Request REMOVECONNFORRECOVERY"
2212 " with CID: %hu on CID: %hu, implementation error.\n",
2213 cmd
->logout_cid
, conn
->cid
);
2214 cmd
->logout_response
= ISCSI_LOGOUT_CLEANUP_FAILED
;
2215 iscsit_add_cmd_to_response_queue(cmd
, conn
, cmd
->i_state
);
2219 iscsit_add_cmd_to_response_queue(cmd
, conn
, cmd
->i_state
);
2225 iscsit_handle_logout_cmd(struct iscsi_conn
*conn
, struct iscsi_cmd
*cmd
,
2228 int cmdsn_ret
, logout_remove
= 0;
2230 struct iscsi_logout
*hdr
;
2231 struct iscsi_tiqn
*tiqn
= iscsit_snmp_get_tiqn(conn
);
2233 hdr
= (struct iscsi_logout
*) buf
;
2234 reason_code
= (hdr
->flags
& 0x7f);
2237 spin_lock(&tiqn
->logout_stats
.lock
);
2238 if (reason_code
== ISCSI_LOGOUT_REASON_CLOSE_SESSION
)
2239 tiqn
->logout_stats
.normal_logouts
++;
2241 tiqn
->logout_stats
.abnormal_logouts
++;
2242 spin_unlock(&tiqn
->logout_stats
.lock
);
2245 pr_debug("Got Logout Request ITT: 0x%08x CmdSN: 0x%08x"
2246 " ExpStatSN: 0x%08x Reason: 0x%02x CID: %hu on CID: %hu\n",
2247 hdr
->itt
, hdr
->cmdsn
, hdr
->exp_statsn
, reason_code
,
2248 hdr
->cid
, conn
->cid
);
2250 if (conn
->conn_state
!= TARG_CONN_STATE_LOGGED_IN
) {
2251 pr_err("Received logout request on connection that"
2252 " is not in logged in state, ignoring request.\n");
2253 iscsit_free_cmd(cmd
, false);
2257 cmd
->iscsi_opcode
= ISCSI_OP_LOGOUT
;
2258 cmd
->i_state
= ISTATE_SEND_LOGOUTRSP
;
2259 cmd
->immediate_cmd
= ((hdr
->opcode
& ISCSI_OP_IMMEDIATE
) ? 1 : 0);
2260 conn
->sess
->init_task_tag
= cmd
->init_task_tag
= hdr
->itt
;
2261 cmd
->targ_xfer_tag
= 0xFFFFFFFF;
2262 cmd
->cmd_sn
= be32_to_cpu(hdr
->cmdsn
);
2263 cmd
->exp_stat_sn
= be32_to_cpu(hdr
->exp_statsn
);
2264 cmd
->logout_cid
= be16_to_cpu(hdr
->cid
);
2265 cmd
->logout_reason
= reason_code
;
2266 cmd
->data_direction
= DMA_NONE
;
2269 * We need to sleep in these cases (by returning 1) until the Logout
2270 * Response gets sent in the tx thread.
2272 if ((reason_code
== ISCSI_LOGOUT_REASON_CLOSE_SESSION
) ||
2273 ((reason_code
== ISCSI_LOGOUT_REASON_CLOSE_CONNECTION
) &&
2274 be16_to_cpu(hdr
->cid
) == conn
->cid
))
2277 spin_lock_bh(&conn
->cmd_lock
);
2278 list_add_tail(&cmd
->i_conn_node
, &conn
->conn_cmd_list
);
2279 spin_unlock_bh(&conn
->cmd_lock
);
2281 if (reason_code
!= ISCSI_LOGOUT_REASON_RECOVERY
)
2282 iscsit_ack_from_expstatsn(conn
, be32_to_cpu(hdr
->exp_statsn
));
2285 * Immediate commands are executed, well, immediately.
2286 * Non-Immediate Logout Commands are executed in CmdSN order.
2288 if (cmd
->immediate_cmd
) {
2289 int ret
= iscsit_execute_cmd(cmd
, 0);
2294 cmdsn_ret
= iscsit_sequence_cmd(conn
, cmd
, buf
, hdr
->cmdsn
);
2295 if (cmdsn_ret
== CMDSN_LOWER_THAN_EXP
)
2297 else if (cmdsn_ret
== CMDSN_ERROR_CANNOT_RECOVER
)
2301 return logout_remove
;
2303 EXPORT_SYMBOL(iscsit_handle_logout_cmd
);
2305 static int iscsit_handle_snack(
2306 struct iscsi_conn
*conn
,
2309 struct iscsi_snack
*hdr
;
2311 hdr
= (struct iscsi_snack
*) buf
;
2312 hdr
->flags
&= ~ISCSI_FLAG_CMD_FINAL
;
2314 pr_debug("Got ISCSI_INIT_SNACK, ITT: 0x%08x, ExpStatSN:"
2315 " 0x%08x, Type: 0x%02x, BegRun: 0x%08x, RunLength: 0x%08x,"
2316 " CID: %hu\n", hdr
->itt
, hdr
->exp_statsn
, hdr
->flags
,
2317 hdr
->begrun
, hdr
->runlength
, conn
->cid
);
2319 if (!conn
->sess
->sess_ops
->ErrorRecoveryLevel
) {
2320 pr_err("Initiator sent SNACK request while in"
2321 " ErrorRecoveryLevel=0.\n");
2322 return iscsit_add_reject(conn
, ISCSI_REASON_PROTOCOL_ERROR
,
2326 * SNACK_DATA and SNACK_R2T are both 0, so check which function to
2327 * call from inside iscsi_send_recovery_datain_or_r2t().
2329 switch (hdr
->flags
& ISCSI_FLAG_SNACK_TYPE_MASK
) {
2331 return iscsit_handle_recovery_datain_or_r2t(conn
, buf
,
2333 be32_to_cpu(hdr
->ttt
),
2334 be32_to_cpu(hdr
->begrun
),
2335 be32_to_cpu(hdr
->runlength
));
2336 case ISCSI_FLAG_SNACK_TYPE_STATUS
:
2337 return iscsit_handle_status_snack(conn
, hdr
->itt
,
2338 be32_to_cpu(hdr
->ttt
),
2339 be32_to_cpu(hdr
->begrun
), be32_to_cpu(hdr
->runlength
));
2340 case ISCSI_FLAG_SNACK_TYPE_DATA_ACK
:
2341 return iscsit_handle_data_ack(conn
, be32_to_cpu(hdr
->ttt
),
2342 be32_to_cpu(hdr
->begrun
),
2343 be32_to_cpu(hdr
->runlength
));
2344 case ISCSI_FLAG_SNACK_TYPE_RDATA
:
2345 /* FIXME: Support R-Data SNACK */
2346 pr_err("R-Data SNACK Not Supported.\n");
2347 return iscsit_add_reject(conn
, ISCSI_REASON_PROTOCOL_ERROR
,
2350 pr_err("Unknown SNACK type 0x%02x, protocol"
2351 " error.\n", hdr
->flags
& 0x0f);
2352 return iscsit_add_reject(conn
, ISCSI_REASON_PROTOCOL_ERROR
,
2359 static void iscsit_rx_thread_wait_for_tcp(struct iscsi_conn
*conn
)
2361 if ((conn
->sock
->sk
->sk_shutdown
& SEND_SHUTDOWN
) ||
2362 (conn
->sock
->sk
->sk_shutdown
& RCV_SHUTDOWN
)) {
2363 wait_for_completion_interruptible_timeout(
2364 &conn
->rx_half_close_comp
,
2365 ISCSI_RX_THREAD_TCP_TIMEOUT
* HZ
);
2369 static int iscsit_handle_immediate_data(
2370 struct iscsi_cmd
*cmd
,
2371 struct iscsi_scsi_req
*hdr
,
2374 int iov_ret
, rx_got
= 0, rx_size
= 0;
2375 u32 checksum
, iov_count
= 0, padding
= 0;
2376 struct iscsi_conn
*conn
= cmd
->conn
;
2379 iov_ret
= iscsit_map_iovec(cmd
, cmd
->iov_data
, cmd
->write_data_done
, length
);
2381 return IMMEDIATE_DATA_CANNOT_RECOVER
;
2384 iov_count
= iov_ret
;
2385 iov
= &cmd
->iov_data
[0];
2387 padding
= ((-length
) & 3);
2389 iov
[iov_count
].iov_base
= cmd
->pad_bytes
;
2390 iov
[iov_count
++].iov_len
= padding
;
2394 if (conn
->conn_ops
->DataDigest
) {
2395 iov
[iov_count
].iov_base
= &checksum
;
2396 iov
[iov_count
++].iov_len
= ISCSI_CRC_LEN
;
2397 rx_size
+= ISCSI_CRC_LEN
;
2400 rx_got
= rx_data(conn
, &cmd
->iov_data
[0], iov_count
, rx_size
);
2402 iscsit_unmap_iovec(cmd
);
2404 if (rx_got
!= rx_size
) {
2405 iscsit_rx_thread_wait_for_tcp(conn
);
2406 return IMMEDIATE_DATA_CANNOT_RECOVER
;
2409 if (conn
->conn_ops
->DataDigest
) {
2412 data_crc
= iscsit_do_crypto_hash_sg(&conn
->conn_rx_hash
, cmd
,
2413 cmd
->write_data_done
, length
, padding
,
2416 if (checksum
!= data_crc
) {
2417 pr_err("ImmediateData CRC32C DataDigest 0x%08x"
2418 " does not match computed 0x%08x\n", checksum
,
2421 if (!conn
->sess
->sess_ops
->ErrorRecoveryLevel
) {
2422 pr_err("Unable to recover from"
2423 " Immediate Data digest failure while"
2425 iscsit_reject_cmd(cmd
,
2426 ISCSI_REASON_DATA_DIGEST_ERROR
,
2427 (unsigned char *)hdr
);
2428 return IMMEDIATE_DATA_CANNOT_RECOVER
;
2430 iscsit_reject_cmd(cmd
,
2431 ISCSI_REASON_DATA_DIGEST_ERROR
,
2432 (unsigned char *)hdr
);
2433 return IMMEDIATE_DATA_ERL1_CRC_FAILURE
;
2436 pr_debug("Got CRC32C DataDigest 0x%08x for"
2437 " %u bytes of Immediate Data\n", checksum
,
2442 cmd
->write_data_done
+= length
;
2444 if (cmd
->write_data_done
== cmd
->se_cmd
.data_length
) {
2445 spin_lock_bh(&cmd
->istate_lock
);
2446 cmd
->cmd_flags
|= ICF_GOT_LAST_DATAOUT
;
2447 cmd
->i_state
= ISTATE_RECEIVED_LAST_DATAOUT
;
2448 spin_unlock_bh(&cmd
->istate_lock
);
2451 return IMMEDIATE_DATA_NORMAL_OPERATION
;
2455 * Called with sess->conn_lock held.
2457 /* #warning iscsi_build_conn_drop_async_message() only sends out on connections
2458 with active network interface */
2459 static void iscsit_build_conn_drop_async_message(struct iscsi_conn
*conn
)
2461 struct iscsi_cmd
*cmd
;
2462 struct iscsi_conn
*conn_p
;
2465 * Only send a Asynchronous Message on connections whos network
2466 * interface is still functional.
2468 list_for_each_entry(conn_p
, &conn
->sess
->sess_conn_list
, conn_list
) {
2469 if (conn_p
->conn_state
== TARG_CONN_STATE_LOGGED_IN
) {
2470 iscsit_inc_conn_usage_count(conn_p
);
2478 cmd
= iscsit_allocate_cmd(conn_p
, GFP_ATOMIC
);
2480 iscsit_dec_conn_usage_count(conn_p
);
2484 cmd
->logout_cid
= conn
->cid
;
2485 cmd
->iscsi_opcode
= ISCSI_OP_ASYNC_EVENT
;
2486 cmd
->i_state
= ISTATE_SEND_ASYNCMSG
;
2488 spin_lock_bh(&conn_p
->cmd_lock
);
2489 list_add_tail(&cmd
->i_conn_node
, &conn_p
->conn_cmd_list
);
2490 spin_unlock_bh(&conn_p
->cmd_lock
);
2492 iscsit_add_cmd_to_response_queue(cmd
, conn_p
, cmd
->i_state
);
2493 iscsit_dec_conn_usage_count(conn_p
);
2496 static int iscsit_send_conn_drop_async_message(
2497 struct iscsi_cmd
*cmd
,
2498 struct iscsi_conn
*conn
)
2500 struct iscsi_async
*hdr
;
2502 cmd
->tx_size
= ISCSI_HDR_LEN
;
2503 cmd
->iscsi_opcode
= ISCSI_OP_ASYNC_EVENT
;
2505 hdr
= (struct iscsi_async
*) cmd
->pdu
;
2506 hdr
->opcode
= ISCSI_OP_ASYNC_EVENT
;
2507 hdr
->flags
= ISCSI_FLAG_CMD_FINAL
;
2508 cmd
->init_task_tag
= RESERVED_ITT
;
2509 cmd
->targ_xfer_tag
= 0xFFFFFFFF;
2510 put_unaligned_be64(0xFFFFFFFFFFFFFFFFULL
, &hdr
->rsvd4
[0]);
2511 cmd
->stat_sn
= conn
->stat_sn
++;
2512 hdr
->statsn
= cpu_to_be32(cmd
->stat_sn
);
2513 hdr
->exp_cmdsn
= cpu_to_be32(conn
->sess
->exp_cmd_sn
);
2514 hdr
->max_cmdsn
= cpu_to_be32(conn
->sess
->max_cmd_sn
);
2515 hdr
->async_event
= ISCSI_ASYNC_MSG_DROPPING_CONNECTION
;
2516 hdr
->param1
= cpu_to_be16(cmd
->logout_cid
);
2517 hdr
->param2
= cpu_to_be16(conn
->sess
->sess_ops
->DefaultTime2Wait
);
2518 hdr
->param3
= cpu_to_be16(conn
->sess
->sess_ops
->DefaultTime2Retain
);
2520 if (conn
->conn_ops
->HeaderDigest
) {
2521 u32
*header_digest
= (u32
*)&cmd
->pdu
[ISCSI_HDR_LEN
];
2523 iscsit_do_crypto_hash_buf(&conn
->conn_tx_hash
, hdr
,
2524 ISCSI_HDR_LEN
, 0, NULL
, (u8
*)header_digest
);
2526 cmd
->tx_size
+= ISCSI_CRC_LEN
;
2527 pr_debug("Attaching CRC32C HeaderDigest to"
2528 " Async Message 0x%08x\n", *header_digest
);
2531 cmd
->iov_misc
[0].iov_base
= cmd
->pdu
;
2532 cmd
->iov_misc
[0].iov_len
= cmd
->tx_size
;
2533 cmd
->iov_misc_count
= 1;
2535 pr_debug("Sending Connection Dropped Async Message StatSN:"
2536 " 0x%08x, for CID: %hu on CID: %hu\n", cmd
->stat_sn
,
2537 cmd
->logout_cid
, conn
->cid
);
2541 static void iscsit_tx_thread_wait_for_tcp(struct iscsi_conn
*conn
)
2543 if ((conn
->sock
->sk
->sk_shutdown
& SEND_SHUTDOWN
) ||
2544 (conn
->sock
->sk
->sk_shutdown
& RCV_SHUTDOWN
)) {
2545 wait_for_completion_interruptible_timeout(
2546 &conn
->tx_half_close_comp
,
2547 ISCSI_TX_THREAD_TCP_TIMEOUT
* HZ
);
2552 iscsit_build_datain_pdu(struct iscsi_cmd
*cmd
, struct iscsi_conn
*conn
,
2553 struct iscsi_datain
*datain
, struct iscsi_data_rsp
*hdr
,
2556 hdr
->opcode
= ISCSI_OP_SCSI_DATA_IN
;
2557 hdr
->flags
= datain
->flags
;
2558 if (hdr
->flags
& ISCSI_FLAG_DATA_STATUS
) {
2559 if (cmd
->se_cmd
.se_cmd_flags
& SCF_OVERFLOW_BIT
) {
2560 hdr
->flags
|= ISCSI_FLAG_DATA_OVERFLOW
;
2561 hdr
->residual_count
= cpu_to_be32(cmd
->se_cmd
.residual_count
);
2562 } else if (cmd
->se_cmd
.se_cmd_flags
& SCF_UNDERFLOW_BIT
) {
2563 hdr
->flags
|= ISCSI_FLAG_DATA_UNDERFLOW
;
2564 hdr
->residual_count
= cpu_to_be32(cmd
->se_cmd
.residual_count
);
2567 hton24(hdr
->dlength
, datain
->length
);
2568 if (hdr
->flags
& ISCSI_FLAG_DATA_ACK
)
2569 int_to_scsilun(cmd
->se_cmd
.orig_fe_lun
,
2570 (struct scsi_lun
*)&hdr
->lun
);
2572 put_unaligned_le64(0xFFFFFFFFFFFFFFFFULL
, &hdr
->lun
);
2574 hdr
->itt
= cmd
->init_task_tag
;
2576 if (hdr
->flags
& ISCSI_FLAG_DATA_ACK
)
2577 hdr
->ttt
= cpu_to_be32(cmd
->targ_xfer_tag
);
2579 hdr
->ttt
= cpu_to_be32(0xFFFFFFFF);
2581 hdr
->statsn
= cpu_to_be32(cmd
->stat_sn
);
2583 hdr
->statsn
= cpu_to_be32(0xFFFFFFFF);
2585 hdr
->exp_cmdsn
= cpu_to_be32(conn
->sess
->exp_cmd_sn
);
2586 hdr
->max_cmdsn
= cpu_to_be32(conn
->sess
->max_cmd_sn
);
2587 hdr
->datasn
= cpu_to_be32(datain
->data_sn
);
2588 hdr
->offset
= cpu_to_be32(datain
->offset
);
2590 pr_debug("Built DataIN ITT: 0x%08x, StatSN: 0x%08x,"
2591 " DataSN: 0x%08x, Offset: %u, Length: %u, CID: %hu\n",
2592 cmd
->init_task_tag
, ntohl(hdr
->statsn
), ntohl(hdr
->datasn
),
2593 ntohl(hdr
->offset
), datain
->length
, conn
->cid
);
2596 static int iscsit_send_datain(struct iscsi_cmd
*cmd
, struct iscsi_conn
*conn
)
2598 struct iscsi_data_rsp
*hdr
= (struct iscsi_data_rsp
*)&cmd
->pdu
[0];
2599 struct iscsi_datain datain
;
2600 struct iscsi_datain_req
*dr
;
2602 u32 iov_count
= 0, tx_size
= 0;
2603 int eodr
= 0, ret
, iov_ret
;
2604 bool set_statsn
= false;
2606 memset(&datain
, 0, sizeof(struct iscsi_datain
));
2607 dr
= iscsit_get_datain_values(cmd
, &datain
);
2609 pr_err("iscsit_get_datain_values failed for ITT: 0x%08x\n",
2610 cmd
->init_task_tag
);
2614 * Be paranoid and double check the logic for now.
2616 if ((datain
.offset
+ datain
.length
) > cmd
->se_cmd
.data_length
) {
2617 pr_err("Command ITT: 0x%08x, datain.offset: %u and"
2618 " datain.length: %u exceeds cmd->data_length: %u\n",
2619 cmd
->init_task_tag
, datain
.offset
, datain
.length
,
2620 cmd
->se_cmd
.data_length
);
2624 atomic_long_add(datain
.length
, &conn
->sess
->tx_data_octets
);
2626 * Special case for successfully execution w/ both DATAIN
2629 if ((datain
.flags
& ISCSI_FLAG_DATA_STATUS
) &&
2630 (cmd
->se_cmd
.se_cmd_flags
& SCF_TRANSPORT_TASK_SENSE
))
2631 datain
.flags
&= ~ISCSI_FLAG_DATA_STATUS
;
2633 if ((dr
->dr_complete
== DATAIN_COMPLETE_NORMAL
) ||
2634 (dr
->dr_complete
== DATAIN_COMPLETE_CONNECTION_RECOVERY
)) {
2635 iscsit_increment_maxcmdsn(cmd
, conn
->sess
);
2636 cmd
->stat_sn
= conn
->stat_sn
++;
2638 } else if (dr
->dr_complete
==
2639 DATAIN_COMPLETE_WITHIN_COMMAND_RECOVERY
)
2643 iscsit_build_datain_pdu(cmd
, conn
, &datain
, hdr
, set_statsn
);
2645 iov
= &cmd
->iov_data
[0];
2646 iov
[iov_count
].iov_base
= cmd
->pdu
;
2647 iov
[iov_count
++].iov_len
= ISCSI_HDR_LEN
;
2648 tx_size
+= ISCSI_HDR_LEN
;
2650 if (conn
->conn_ops
->HeaderDigest
) {
2651 u32
*header_digest
= (u32
*)&cmd
->pdu
[ISCSI_HDR_LEN
];
2653 iscsit_do_crypto_hash_buf(&conn
->conn_tx_hash
, cmd
->pdu
,
2654 ISCSI_HDR_LEN
, 0, NULL
, (u8
*)header_digest
);
2656 iov
[0].iov_len
+= ISCSI_CRC_LEN
;
2657 tx_size
+= ISCSI_CRC_LEN
;
2659 pr_debug("Attaching CRC32 HeaderDigest"
2660 " for DataIN PDU 0x%08x\n", *header_digest
);
2663 iov_ret
= iscsit_map_iovec(cmd
, &cmd
->iov_data
[1],
2664 datain
.offset
, datain
.length
);
2668 iov_count
+= iov_ret
;
2669 tx_size
+= datain
.length
;
2671 cmd
->padding
= ((-datain
.length
) & 3);
2673 iov
[iov_count
].iov_base
= cmd
->pad_bytes
;
2674 iov
[iov_count
++].iov_len
= cmd
->padding
;
2675 tx_size
+= cmd
->padding
;
2677 pr_debug("Attaching %u padding bytes\n",
2680 if (conn
->conn_ops
->DataDigest
) {
2681 cmd
->data_crc
= iscsit_do_crypto_hash_sg(&conn
->conn_tx_hash
, cmd
,
2682 datain
.offset
, datain
.length
, cmd
->padding
, cmd
->pad_bytes
);
2684 iov
[iov_count
].iov_base
= &cmd
->data_crc
;
2685 iov
[iov_count
++].iov_len
= ISCSI_CRC_LEN
;
2686 tx_size
+= ISCSI_CRC_LEN
;
2688 pr_debug("Attached CRC32C DataDigest %d bytes, crc"
2689 " 0x%08x\n", datain
.length
+cmd
->padding
, cmd
->data_crc
);
2692 cmd
->iov_data_count
= iov_count
;
2693 cmd
->tx_size
= tx_size
;
2695 /* sendpage is preferred but can't insert markers */
2696 if (!conn
->conn_ops
->IFMarker
)
2697 ret
= iscsit_fe_sendpage_sg(cmd
, conn
);
2699 ret
= iscsit_send_tx_data(cmd
, conn
, 0);
2701 iscsit_unmap_iovec(cmd
);
2704 iscsit_tx_thread_wait_for_tcp(conn
);
2708 if (dr
->dr_complete
) {
2709 eodr
= (cmd
->se_cmd
.se_cmd_flags
& SCF_TRANSPORT_TASK_SENSE
) ?
2711 iscsit_free_datain_req(cmd
, dr
);
2718 iscsit_build_logout_rsp(struct iscsi_cmd
*cmd
, struct iscsi_conn
*conn
,
2719 struct iscsi_logout_rsp
*hdr
)
2721 struct iscsi_conn
*logout_conn
= NULL
;
2722 struct iscsi_conn_recovery
*cr
= NULL
;
2723 struct iscsi_session
*sess
= conn
->sess
;
2725 * The actual shutting down of Sessions and/or Connections
2726 * for CLOSESESSION and CLOSECONNECTION Logout Requests
2727 * is done in scsi_logout_post_handler().
2729 switch (cmd
->logout_reason
) {
2730 case ISCSI_LOGOUT_REASON_CLOSE_SESSION
:
2731 pr_debug("iSCSI session logout successful, setting"
2732 " logout response to ISCSI_LOGOUT_SUCCESS.\n");
2733 cmd
->logout_response
= ISCSI_LOGOUT_SUCCESS
;
2735 case ISCSI_LOGOUT_REASON_CLOSE_CONNECTION
:
2736 if (cmd
->logout_response
== ISCSI_LOGOUT_CID_NOT_FOUND
)
2739 * For CLOSECONNECTION logout requests carrying
2740 * a matching logout CID -> local CID, the reference
2741 * for the local CID will have been incremented in
2742 * iscsi_logout_closeconnection().
2744 * For CLOSECONNECTION logout requests carrying
2745 * a different CID than the connection it arrived
2746 * on, the connection responding to cmd->logout_cid
2747 * is stopped in iscsit_logout_post_handler_diffcid().
2750 pr_debug("iSCSI CID: %hu logout on CID: %hu"
2751 " successful.\n", cmd
->logout_cid
, conn
->cid
);
2752 cmd
->logout_response
= ISCSI_LOGOUT_SUCCESS
;
2754 case ISCSI_LOGOUT_REASON_RECOVERY
:
2755 if ((cmd
->logout_response
== ISCSI_LOGOUT_RECOVERY_UNSUPPORTED
) ||
2756 (cmd
->logout_response
== ISCSI_LOGOUT_CLEANUP_FAILED
))
2759 * If the connection is still active from our point of view
2760 * force connection recovery to occur.
2762 logout_conn
= iscsit_get_conn_from_cid_rcfr(sess
,
2765 iscsit_connection_reinstatement_rcfr(logout_conn
);
2766 iscsit_dec_conn_usage_count(logout_conn
);
2769 cr
= iscsit_get_inactive_connection_recovery_entry(
2770 conn
->sess
, cmd
->logout_cid
);
2772 pr_err("Unable to locate CID: %hu for"
2773 " REMOVECONNFORRECOVERY Logout Request.\n",
2775 cmd
->logout_response
= ISCSI_LOGOUT_CID_NOT_FOUND
;
2779 iscsit_discard_cr_cmds_by_expstatsn(cr
, cmd
->exp_stat_sn
);
2781 pr_debug("iSCSI REMOVECONNFORRECOVERY logout"
2782 " for recovery for CID: %hu on CID: %hu successful.\n",
2783 cmd
->logout_cid
, conn
->cid
);
2784 cmd
->logout_response
= ISCSI_LOGOUT_SUCCESS
;
2787 pr_err("Unknown cmd->logout_reason: 0x%02x\n",
2788 cmd
->logout_reason
);
2792 hdr
->opcode
= ISCSI_OP_LOGOUT_RSP
;
2793 hdr
->flags
|= ISCSI_FLAG_CMD_FINAL
;
2794 hdr
->response
= cmd
->logout_response
;
2795 hdr
->itt
= cmd
->init_task_tag
;
2796 cmd
->stat_sn
= conn
->stat_sn
++;
2797 hdr
->statsn
= cpu_to_be32(cmd
->stat_sn
);
2799 iscsit_increment_maxcmdsn(cmd
, conn
->sess
);
2800 hdr
->exp_cmdsn
= cpu_to_be32(conn
->sess
->exp_cmd_sn
);
2801 hdr
->max_cmdsn
= cpu_to_be32(conn
->sess
->max_cmd_sn
);
2803 pr_debug("Built Logout Response ITT: 0x%08x StatSN:"
2804 " 0x%08x Response: 0x%02x CID: %hu on CID: %hu\n",
2805 cmd
->init_task_tag
, cmd
->stat_sn
, hdr
->response
,
2806 cmd
->logout_cid
, conn
->cid
);
2810 EXPORT_SYMBOL(iscsit_build_logout_rsp
);
2813 iscsit_send_logout(struct iscsi_cmd
*cmd
, struct iscsi_conn
*conn
)
2816 int niov
= 0, tx_size
, rc
;
2818 rc
= iscsit_build_logout_rsp(cmd
, conn
,
2819 (struct iscsi_logout_rsp
*)&cmd
->pdu
[0]);
2823 tx_size
= ISCSI_HDR_LEN
;
2824 iov
= &cmd
->iov_misc
[0];
2825 iov
[niov
].iov_base
= cmd
->pdu
;
2826 iov
[niov
++].iov_len
= ISCSI_HDR_LEN
;
2828 if (conn
->conn_ops
->HeaderDigest
) {
2829 u32
*header_digest
= (u32
*)&cmd
->pdu
[ISCSI_HDR_LEN
];
2831 iscsit_do_crypto_hash_buf(&conn
->conn_tx_hash
, &cmd
->pdu
[0],
2832 ISCSI_HDR_LEN
, 0, NULL
, (u8
*)header_digest
);
2834 iov
[0].iov_len
+= ISCSI_CRC_LEN
;
2835 tx_size
+= ISCSI_CRC_LEN
;
2836 pr_debug("Attaching CRC32C HeaderDigest to"
2837 " Logout Response 0x%08x\n", *header_digest
);
2839 cmd
->iov_misc_count
= niov
;
2840 cmd
->tx_size
= tx_size
;
2846 iscsit_build_nopin_rsp(struct iscsi_cmd
*cmd
, struct iscsi_conn
*conn
,
2847 struct iscsi_nopin
*hdr
, bool nopout_response
)
2849 hdr
->opcode
= ISCSI_OP_NOOP_IN
;
2850 hdr
->flags
|= ISCSI_FLAG_CMD_FINAL
;
2851 hton24(hdr
->dlength
, cmd
->buf_ptr_size
);
2852 if (nopout_response
)
2853 put_unaligned_le64(0xFFFFFFFFFFFFFFFFULL
, &hdr
->lun
);
2854 hdr
->itt
= cmd
->init_task_tag
;
2855 hdr
->ttt
= cpu_to_be32(cmd
->targ_xfer_tag
);
2856 cmd
->stat_sn
= (nopout_response
) ? conn
->stat_sn
++ :
2858 hdr
->statsn
= cpu_to_be32(cmd
->stat_sn
);
2860 if (nopout_response
)
2861 iscsit_increment_maxcmdsn(cmd
, conn
->sess
);
2863 hdr
->exp_cmdsn
= cpu_to_be32(conn
->sess
->exp_cmd_sn
);
2864 hdr
->max_cmdsn
= cpu_to_be32(conn
->sess
->max_cmd_sn
);
2866 pr_debug("Built NOPIN %s Response ITT: 0x%08x, TTT: 0x%08x,"
2867 " StatSN: 0x%08x, Length %u\n", (nopout_response
) ?
2868 "Solicitied" : "Unsolicitied", cmd
->init_task_tag
,
2869 cmd
->targ_xfer_tag
, cmd
->stat_sn
, cmd
->buf_ptr_size
);
2871 EXPORT_SYMBOL(iscsit_build_nopin_rsp
);
2874 * Unsolicited NOPIN, either requesting a response or not.
2876 static int iscsit_send_unsolicited_nopin(
2877 struct iscsi_cmd
*cmd
,
2878 struct iscsi_conn
*conn
,
2881 struct iscsi_nopin
*hdr
= (struct iscsi_nopin
*)&cmd
->pdu
[0];
2882 int tx_size
= ISCSI_HDR_LEN
, ret
;
2884 iscsit_build_nopin_rsp(cmd
, conn
, hdr
, false);
2886 if (conn
->conn_ops
->HeaderDigest
) {
2887 u32
*header_digest
= (u32
*)&cmd
->pdu
[ISCSI_HDR_LEN
];
2889 iscsit_do_crypto_hash_buf(&conn
->conn_tx_hash
, hdr
,
2890 ISCSI_HDR_LEN
, 0, NULL
, (u8
*)header_digest
);
2892 tx_size
+= ISCSI_CRC_LEN
;
2893 pr_debug("Attaching CRC32C HeaderDigest to"
2894 " NopIN 0x%08x\n", *header_digest
);
2897 cmd
->iov_misc
[0].iov_base
= cmd
->pdu
;
2898 cmd
->iov_misc
[0].iov_len
= tx_size
;
2899 cmd
->iov_misc_count
= 1;
2900 cmd
->tx_size
= tx_size
;
2902 pr_debug("Sending Unsolicited NOPIN TTT: 0x%08x StatSN:"
2903 " 0x%08x CID: %hu\n", hdr
->ttt
, cmd
->stat_sn
, conn
->cid
);
2905 ret
= iscsit_send_tx_data(cmd
, conn
, 1);
2907 iscsit_tx_thread_wait_for_tcp(conn
);
2911 spin_lock_bh(&cmd
->istate_lock
);
2912 cmd
->i_state
= want_response
?
2913 ISTATE_SENT_NOPIN_WANT_RESPONSE
: ISTATE_SENT_STATUS
;
2914 spin_unlock_bh(&cmd
->istate_lock
);
2920 iscsit_send_nopin(struct iscsi_cmd
*cmd
, struct iscsi_conn
*conn
)
2922 struct iscsi_nopin
*hdr
= (struct iscsi_nopin
*)&cmd
->pdu
[0];
2925 int niov
= 0, tx_size
;
2927 iscsit_build_nopin_rsp(cmd
, conn
, hdr
, true);
2929 tx_size
= ISCSI_HDR_LEN
;
2930 iov
= &cmd
->iov_misc
[0];
2931 iov
[niov
].iov_base
= cmd
->pdu
;
2932 iov
[niov
++].iov_len
= ISCSI_HDR_LEN
;
2934 if (conn
->conn_ops
->HeaderDigest
) {
2935 u32
*header_digest
= (u32
*)&cmd
->pdu
[ISCSI_HDR_LEN
];
2937 iscsit_do_crypto_hash_buf(&conn
->conn_tx_hash
, hdr
,
2938 ISCSI_HDR_LEN
, 0, NULL
, (u8
*)header_digest
);
2940 iov
[0].iov_len
+= ISCSI_CRC_LEN
;
2941 tx_size
+= ISCSI_CRC_LEN
;
2942 pr_debug("Attaching CRC32C HeaderDigest"
2943 " to NopIn 0x%08x\n", *header_digest
);
2947 * NOPOUT Ping Data is attached to struct iscsi_cmd->buf_ptr.
2948 * NOPOUT DataSegmentLength is at struct iscsi_cmd->buf_ptr_size.
2950 if (cmd
->buf_ptr_size
) {
2951 iov
[niov
].iov_base
= cmd
->buf_ptr
;
2952 iov
[niov
++].iov_len
= cmd
->buf_ptr_size
;
2953 tx_size
+= cmd
->buf_ptr_size
;
2955 pr_debug("Echoing back %u bytes of ping"
2956 " data.\n", cmd
->buf_ptr_size
);
2958 padding
= ((-cmd
->buf_ptr_size
) & 3);
2960 iov
[niov
].iov_base
= &cmd
->pad_bytes
;
2961 iov
[niov
++].iov_len
= padding
;
2963 pr_debug("Attaching %u additional"
2964 " padding bytes.\n", padding
);
2966 if (conn
->conn_ops
->DataDigest
) {
2967 iscsit_do_crypto_hash_buf(&conn
->conn_tx_hash
,
2968 cmd
->buf_ptr
, cmd
->buf_ptr_size
,
2969 padding
, (u8
*)&cmd
->pad_bytes
,
2970 (u8
*)&cmd
->data_crc
);
2972 iov
[niov
].iov_base
= &cmd
->data_crc
;
2973 iov
[niov
++].iov_len
= ISCSI_CRC_LEN
;
2974 tx_size
+= ISCSI_CRC_LEN
;
2975 pr_debug("Attached DataDigest for %u"
2976 " bytes of ping data, CRC 0x%08x\n",
2977 cmd
->buf_ptr_size
, cmd
->data_crc
);
2981 cmd
->iov_misc_count
= niov
;
2982 cmd
->tx_size
= tx_size
;
2987 static int iscsit_send_r2t(
2988 struct iscsi_cmd
*cmd
,
2989 struct iscsi_conn
*conn
)
2992 struct iscsi_r2t
*r2t
;
2993 struct iscsi_r2t_rsp
*hdr
;
2996 r2t
= iscsit_get_r2t_from_list(cmd
);
3000 hdr
= (struct iscsi_r2t_rsp
*) cmd
->pdu
;
3001 memset(hdr
, 0, ISCSI_HDR_LEN
);
3002 hdr
->opcode
= ISCSI_OP_R2T
;
3003 hdr
->flags
|= ISCSI_FLAG_CMD_FINAL
;
3004 int_to_scsilun(cmd
->se_cmd
.orig_fe_lun
,
3005 (struct scsi_lun
*)&hdr
->lun
);
3006 hdr
->itt
= cmd
->init_task_tag
;
3007 spin_lock_bh(&conn
->sess
->ttt_lock
);
3008 r2t
->targ_xfer_tag
= conn
->sess
->targ_xfer_tag
++;
3009 if (r2t
->targ_xfer_tag
== 0xFFFFFFFF)
3010 r2t
->targ_xfer_tag
= conn
->sess
->targ_xfer_tag
++;
3011 spin_unlock_bh(&conn
->sess
->ttt_lock
);
3012 hdr
->ttt
= cpu_to_be32(r2t
->targ_xfer_tag
);
3013 hdr
->statsn
= cpu_to_be32(conn
->stat_sn
);
3014 hdr
->exp_cmdsn
= cpu_to_be32(conn
->sess
->exp_cmd_sn
);
3015 hdr
->max_cmdsn
= cpu_to_be32(conn
->sess
->max_cmd_sn
);
3016 hdr
->r2tsn
= cpu_to_be32(r2t
->r2t_sn
);
3017 hdr
->data_offset
= cpu_to_be32(r2t
->offset
);
3018 hdr
->data_length
= cpu_to_be32(r2t
->xfer_len
);
3020 cmd
->iov_misc
[0].iov_base
= cmd
->pdu
;
3021 cmd
->iov_misc
[0].iov_len
= ISCSI_HDR_LEN
;
3022 tx_size
+= ISCSI_HDR_LEN
;
3024 if (conn
->conn_ops
->HeaderDigest
) {
3025 u32
*header_digest
= (u32
*)&cmd
->pdu
[ISCSI_HDR_LEN
];
3027 iscsit_do_crypto_hash_buf(&conn
->conn_tx_hash
, hdr
,
3028 ISCSI_HDR_LEN
, 0, NULL
, (u8
*)header_digest
);
3030 cmd
->iov_misc
[0].iov_len
+= ISCSI_CRC_LEN
;
3031 tx_size
+= ISCSI_CRC_LEN
;
3032 pr_debug("Attaching CRC32 HeaderDigest for R2T"
3033 " PDU 0x%08x\n", *header_digest
);
3036 pr_debug("Built %sR2T, ITT: 0x%08x, TTT: 0x%08x, StatSN:"
3037 " 0x%08x, R2TSN: 0x%08x, Offset: %u, DDTL: %u, CID: %hu\n",
3038 (!r2t
->recovery_r2t
) ? "" : "Recovery ", cmd
->init_task_tag
,
3039 r2t
->targ_xfer_tag
, ntohl(hdr
->statsn
), r2t
->r2t_sn
,
3040 r2t
->offset
, r2t
->xfer_len
, conn
->cid
);
3042 cmd
->iov_misc_count
= 1;
3043 cmd
->tx_size
= tx_size
;
3045 spin_lock_bh(&cmd
->r2t_lock
);
3047 spin_unlock_bh(&cmd
->r2t_lock
);
3049 ret
= iscsit_send_tx_data(cmd
, conn
, 1);
3051 iscsit_tx_thread_wait_for_tcp(conn
);
3055 spin_lock_bh(&cmd
->dataout_timeout_lock
);
3056 iscsit_start_dataout_timer(cmd
, conn
);
3057 spin_unlock_bh(&cmd
->dataout_timeout_lock
);
3063 * @recovery: If called from iscsi_task_reassign_complete_write() for
3064 * connection recovery.
3066 int iscsit_build_r2ts_for_cmd(
3067 struct iscsi_conn
*conn
,
3068 struct iscsi_cmd
*cmd
,
3072 u32 offset
= 0, xfer_len
= 0;
3074 spin_lock_bh(&cmd
->r2t_lock
);
3075 if (cmd
->cmd_flags
& ICF_SENT_LAST_R2T
) {
3076 spin_unlock_bh(&cmd
->r2t_lock
);
3080 if (conn
->sess
->sess_ops
->DataSequenceInOrder
&&
3082 cmd
->r2t_offset
= max(cmd
->r2t_offset
, cmd
->write_data_done
);
3084 while (cmd
->outstanding_r2ts
< conn
->sess
->sess_ops
->MaxOutstandingR2T
) {
3085 if (conn
->sess
->sess_ops
->DataSequenceInOrder
) {
3086 offset
= cmd
->r2t_offset
;
3088 if (first_r2t
&& recovery
) {
3089 int new_data_end
= offset
+
3090 conn
->sess
->sess_ops
->MaxBurstLength
-
3091 cmd
->next_burst_len
;
3093 if (new_data_end
> cmd
->se_cmd
.data_length
)
3094 xfer_len
= cmd
->se_cmd
.data_length
- offset
;
3097 conn
->sess
->sess_ops
->MaxBurstLength
-
3098 cmd
->next_burst_len
;
3100 int new_data_end
= offset
+
3101 conn
->sess
->sess_ops
->MaxBurstLength
;
3103 if (new_data_end
> cmd
->se_cmd
.data_length
)
3104 xfer_len
= cmd
->se_cmd
.data_length
- offset
;
3106 xfer_len
= conn
->sess
->sess_ops
->MaxBurstLength
;
3108 cmd
->r2t_offset
+= xfer_len
;
3110 if (cmd
->r2t_offset
== cmd
->se_cmd
.data_length
)
3111 cmd
->cmd_flags
|= ICF_SENT_LAST_R2T
;
3113 struct iscsi_seq
*seq
;
3115 seq
= iscsit_get_seq_holder_for_r2t(cmd
);
3117 spin_unlock_bh(&cmd
->r2t_lock
);
3121 offset
= seq
->offset
;
3122 xfer_len
= seq
->xfer_len
;
3124 if (cmd
->seq_send_order
== cmd
->seq_count
)
3125 cmd
->cmd_flags
|= ICF_SENT_LAST_R2T
;
3127 cmd
->outstanding_r2ts
++;
3130 if (iscsit_add_r2t_to_list(cmd
, offset
, xfer_len
, 0, 0) < 0) {
3131 spin_unlock_bh(&cmd
->r2t_lock
);
3135 if (cmd
->cmd_flags
& ICF_SENT_LAST_R2T
)
3138 spin_unlock_bh(&cmd
->r2t_lock
);
3143 void iscsit_build_rsp_pdu(struct iscsi_cmd
*cmd
, struct iscsi_conn
*conn
,
3144 bool inc_stat_sn
, struct iscsi_scsi_rsp
*hdr
)
3147 cmd
->stat_sn
= conn
->stat_sn
++;
3149 atomic_long_inc(&conn
->sess
->rsp_pdus
);
3151 memset(hdr
, 0, ISCSI_HDR_LEN
);
3152 hdr
->opcode
= ISCSI_OP_SCSI_CMD_RSP
;
3153 hdr
->flags
|= ISCSI_FLAG_CMD_FINAL
;
3154 if (cmd
->se_cmd
.se_cmd_flags
& SCF_OVERFLOW_BIT
) {
3155 hdr
->flags
|= ISCSI_FLAG_CMD_OVERFLOW
;
3156 hdr
->residual_count
= cpu_to_be32(cmd
->se_cmd
.residual_count
);
3157 } else if (cmd
->se_cmd
.se_cmd_flags
& SCF_UNDERFLOW_BIT
) {
3158 hdr
->flags
|= ISCSI_FLAG_CMD_UNDERFLOW
;
3159 hdr
->residual_count
= cpu_to_be32(cmd
->se_cmd
.residual_count
);
3161 hdr
->response
= cmd
->iscsi_response
;
3162 hdr
->cmd_status
= cmd
->se_cmd
.scsi_status
;
3163 hdr
->itt
= cmd
->init_task_tag
;
3164 hdr
->statsn
= cpu_to_be32(cmd
->stat_sn
);
3166 iscsit_increment_maxcmdsn(cmd
, conn
->sess
);
3167 hdr
->exp_cmdsn
= cpu_to_be32(conn
->sess
->exp_cmd_sn
);
3168 hdr
->max_cmdsn
= cpu_to_be32(conn
->sess
->max_cmd_sn
);
3170 pr_debug("Built SCSI Response, ITT: 0x%08x, StatSN: 0x%08x,"
3171 " Response: 0x%02x, SAM Status: 0x%02x, CID: %hu\n",
3172 cmd
->init_task_tag
, cmd
->stat_sn
, cmd
->se_cmd
.scsi_status
,
3173 cmd
->se_cmd
.scsi_status
, conn
->cid
);
3175 EXPORT_SYMBOL(iscsit_build_rsp_pdu
);
3177 static int iscsit_send_response(struct iscsi_cmd
*cmd
, struct iscsi_conn
*conn
)
3179 struct iscsi_scsi_rsp
*hdr
= (struct iscsi_scsi_rsp
*)&cmd
->pdu
[0];
3181 u32 padding
= 0, tx_size
= 0;
3183 bool inc_stat_sn
= (cmd
->i_state
== ISTATE_SEND_STATUS
);
3185 iscsit_build_rsp_pdu(cmd
, conn
, inc_stat_sn
, hdr
);
3187 iov
= &cmd
->iov_misc
[0];
3188 iov
[iov_count
].iov_base
= cmd
->pdu
;
3189 iov
[iov_count
++].iov_len
= ISCSI_HDR_LEN
;
3190 tx_size
+= ISCSI_HDR_LEN
;
3193 * Attach SENSE DATA payload to iSCSI Response PDU
3195 if (cmd
->se_cmd
.sense_buffer
&&
3196 ((cmd
->se_cmd
.se_cmd_flags
& SCF_TRANSPORT_TASK_SENSE
) ||
3197 (cmd
->se_cmd
.se_cmd_flags
& SCF_EMULATED_TASK_SENSE
))) {
3198 put_unaligned_be16(cmd
->se_cmd
.scsi_sense_length
, cmd
->sense_buffer
);
3199 cmd
->se_cmd
.scsi_sense_length
+= sizeof (__be16
);
3201 padding
= -(cmd
->se_cmd
.scsi_sense_length
) & 3;
3202 hton24(hdr
->dlength
, (u32
)cmd
->se_cmd
.scsi_sense_length
);
3203 iov
[iov_count
].iov_base
= cmd
->sense_buffer
;
3204 iov
[iov_count
++].iov_len
=
3205 (cmd
->se_cmd
.scsi_sense_length
+ padding
);
3206 tx_size
+= cmd
->se_cmd
.scsi_sense_length
;
3209 memset(cmd
->sense_buffer
+
3210 cmd
->se_cmd
.scsi_sense_length
, 0, padding
);
3212 pr_debug("Adding %u bytes of padding to"
3213 " SENSE.\n", padding
);
3216 if (conn
->conn_ops
->DataDigest
) {
3217 iscsit_do_crypto_hash_buf(&conn
->conn_tx_hash
,
3219 (cmd
->se_cmd
.scsi_sense_length
+ padding
),
3220 0, NULL
, (u8
*)&cmd
->data_crc
);
3222 iov
[iov_count
].iov_base
= &cmd
->data_crc
;
3223 iov
[iov_count
++].iov_len
= ISCSI_CRC_LEN
;
3224 tx_size
+= ISCSI_CRC_LEN
;
3226 pr_debug("Attaching CRC32 DataDigest for"
3227 " SENSE, %u bytes CRC 0x%08x\n",
3228 (cmd
->se_cmd
.scsi_sense_length
+ padding
),
3232 pr_debug("Attaching SENSE DATA: %u bytes to iSCSI"
3234 cmd
->se_cmd
.scsi_sense_length
);
3237 if (conn
->conn_ops
->HeaderDigest
) {
3238 u32
*header_digest
= (u32
*)&cmd
->pdu
[ISCSI_HDR_LEN
];
3240 iscsit_do_crypto_hash_buf(&conn
->conn_tx_hash
, cmd
->pdu
,
3241 ISCSI_HDR_LEN
, 0, NULL
, (u8
*)header_digest
);
3243 iov
[0].iov_len
+= ISCSI_CRC_LEN
;
3244 tx_size
+= ISCSI_CRC_LEN
;
3245 pr_debug("Attaching CRC32 HeaderDigest for Response"
3246 " PDU 0x%08x\n", *header_digest
);
3249 cmd
->iov_misc_count
= iov_count
;
3250 cmd
->tx_size
= tx_size
;
3255 static u8
iscsit_convert_tcm_tmr_rsp(struct se_tmr_req
*se_tmr
)
3257 switch (se_tmr
->response
) {
3258 case TMR_FUNCTION_COMPLETE
:
3259 return ISCSI_TMF_RSP_COMPLETE
;
3260 case TMR_TASK_DOES_NOT_EXIST
:
3261 return ISCSI_TMF_RSP_NO_TASK
;
3262 case TMR_LUN_DOES_NOT_EXIST
:
3263 return ISCSI_TMF_RSP_NO_LUN
;
3264 case TMR_TASK_MGMT_FUNCTION_NOT_SUPPORTED
:
3265 return ISCSI_TMF_RSP_NOT_SUPPORTED
;
3266 case TMR_FUNCTION_REJECTED
:
3268 return ISCSI_TMF_RSP_REJECTED
;
3273 iscsit_build_task_mgt_rsp(struct iscsi_cmd
*cmd
, struct iscsi_conn
*conn
,
3274 struct iscsi_tm_rsp
*hdr
)
3276 struct se_tmr_req
*se_tmr
= cmd
->se_cmd
.se_tmr_req
;
3278 hdr
->opcode
= ISCSI_OP_SCSI_TMFUNC_RSP
;
3279 hdr
->flags
= ISCSI_FLAG_CMD_FINAL
;
3280 hdr
->response
= iscsit_convert_tcm_tmr_rsp(se_tmr
);
3281 hdr
->itt
= cmd
->init_task_tag
;
3282 cmd
->stat_sn
= conn
->stat_sn
++;
3283 hdr
->statsn
= cpu_to_be32(cmd
->stat_sn
);
3285 iscsit_increment_maxcmdsn(cmd
, conn
->sess
);
3286 hdr
->exp_cmdsn
= cpu_to_be32(conn
->sess
->exp_cmd_sn
);
3287 hdr
->max_cmdsn
= cpu_to_be32(conn
->sess
->max_cmd_sn
);
3289 pr_debug("Built Task Management Response ITT: 0x%08x,"
3290 " StatSN: 0x%08x, Response: 0x%02x, CID: %hu\n",
3291 cmd
->init_task_tag
, cmd
->stat_sn
, hdr
->response
, conn
->cid
);
3293 EXPORT_SYMBOL(iscsit_build_task_mgt_rsp
);
3296 iscsit_send_task_mgt_rsp(struct iscsi_cmd
*cmd
, struct iscsi_conn
*conn
)
3298 struct iscsi_tm_rsp
*hdr
= (struct iscsi_tm_rsp
*)&cmd
->pdu
[0];
3301 iscsit_build_task_mgt_rsp(cmd
, conn
, hdr
);
3303 cmd
->iov_misc
[0].iov_base
= cmd
->pdu
;
3304 cmd
->iov_misc
[0].iov_len
= ISCSI_HDR_LEN
;
3305 tx_size
+= ISCSI_HDR_LEN
;
3307 if (conn
->conn_ops
->HeaderDigest
) {
3308 u32
*header_digest
= (u32
*)&cmd
->pdu
[ISCSI_HDR_LEN
];
3310 iscsit_do_crypto_hash_buf(&conn
->conn_tx_hash
, hdr
,
3311 ISCSI_HDR_LEN
, 0, NULL
, (u8
*)header_digest
);
3313 cmd
->iov_misc
[0].iov_len
+= ISCSI_CRC_LEN
;
3314 tx_size
+= ISCSI_CRC_LEN
;
3315 pr_debug("Attaching CRC32 HeaderDigest for Task"
3316 " Mgmt Response PDU 0x%08x\n", *header_digest
);
3319 cmd
->iov_misc_count
= 1;
3320 cmd
->tx_size
= tx_size
;
3325 static bool iscsit_check_inaddr_any(struct iscsi_np
*np
)
3329 if (np
->np_sockaddr
.ss_family
== AF_INET6
) {
3330 const struct sockaddr_in6 sin6
= {
3331 .sin6_addr
= IN6ADDR_ANY_INIT
};
3332 struct sockaddr_in6
*sock_in6
=
3333 (struct sockaddr_in6
*)&np
->np_sockaddr
;
3335 if (!memcmp(sock_in6
->sin6_addr
.s6_addr
,
3336 sin6
.sin6_addr
.s6_addr
, 16))
3339 struct sockaddr_in
* sock_in
=
3340 (struct sockaddr_in
*)&np
->np_sockaddr
;
3342 if (sock_in
->sin_addr
.s_addr
== htonl(INADDR_ANY
))
3349 #define SENDTARGETS_BUF_LIMIT 32768U
3351 static int iscsit_build_sendtargets_response(struct iscsi_cmd
*cmd
)
3353 char *payload
= NULL
;
3354 struct iscsi_conn
*conn
= cmd
->conn
;
3355 struct iscsi_portal_group
*tpg
;
3356 struct iscsi_tiqn
*tiqn
;
3357 struct iscsi_tpg_np
*tpg_np
;
3358 int buffer_len
, end_of_buf
= 0, len
= 0, payload_len
= 0;
3359 int target_name_printed
;
3360 unsigned char buf
[ISCSI_IQN_LEN
+12]; /* iqn + "TargetName=" + \0 */
3361 unsigned char *text_in
= cmd
->text_in_ptr
, *text_ptr
= NULL
;
3363 buffer_len
= max(conn
->conn_ops
->MaxRecvDataSegmentLength
,
3364 SENDTARGETS_BUF_LIMIT
);
3366 payload
= kzalloc(buffer_len
, GFP_KERNEL
);
3368 pr_err("Unable to allocate memory for sendtargets"
3373 * Locate pointer to iqn./eui. string for IFC_SENDTARGETS_SINGLE
3376 if (cmd
->cmd_flags
& IFC_SENDTARGETS_SINGLE
) {
3377 text_ptr
= strchr(text_in
, '=');
3379 pr_err("Unable to locate '=' string in text_in:"
3385 * Skip over '=' character..
3390 spin_lock(&tiqn_lock
);
3391 list_for_each_entry(tiqn
, &g_tiqn_list
, tiqn_list
) {
3392 if ((cmd
->cmd_flags
& IFC_SENDTARGETS_SINGLE
) &&
3393 strcmp(tiqn
->tiqn
, text_ptr
)) {
3397 target_name_printed
= 0;
3399 spin_lock(&tiqn
->tiqn_tpg_lock
);
3400 list_for_each_entry(tpg
, &tiqn
->tiqn_tpg_list
, tpg_list
) {
3402 /* If demo_mode_discovery=0 and generate_node_acls=0
3403 * (demo mode dislabed) do not return
3404 * TargetName+TargetAddress unless a NodeACL exists.
3407 if ((tpg
->tpg_attrib
.generate_node_acls
== 0) &&
3408 (tpg
->tpg_attrib
.demo_mode_discovery
== 0) &&
3409 (!core_tpg_get_initiator_node_acl(&tpg
->tpg_se_tpg
,
3410 cmd
->conn
->sess
->sess_ops
->InitiatorName
))) {
3414 spin_lock(&tpg
->tpg_state_lock
);
3415 if ((tpg
->tpg_state
== TPG_STATE_FREE
) ||
3416 (tpg
->tpg_state
== TPG_STATE_INACTIVE
)) {
3417 spin_unlock(&tpg
->tpg_state_lock
);
3420 spin_unlock(&tpg
->tpg_state_lock
);
3422 spin_lock(&tpg
->tpg_np_lock
);
3423 list_for_each_entry(tpg_np
, &tpg
->tpg_gnp_list
,
3425 struct iscsi_np
*np
= tpg_np
->tpg_np
;
3426 bool inaddr_any
= iscsit_check_inaddr_any(np
);
3428 if (!target_name_printed
) {
3429 len
= sprintf(buf
, "TargetName=%s",
3433 if ((len
+ payload_len
) > buffer_len
) {
3434 spin_unlock(&tpg
->tpg_np_lock
);
3435 spin_unlock(&tiqn
->tiqn_tpg_lock
);
3439 memcpy(payload
+ payload_len
, buf
, len
);
3441 target_name_printed
= 1;
3444 len
= sprintf(buf
, "TargetAddress="
3446 (inaddr_any
== false) ?
3447 np
->np_ip
: conn
->local_ip
,
3448 (inaddr_any
== false) ?
3449 np
->np_port
: conn
->local_port
,
3453 if ((len
+ payload_len
) > buffer_len
) {
3454 spin_unlock(&tpg
->tpg_np_lock
);
3455 spin_unlock(&tiqn
->tiqn_tpg_lock
);
3459 memcpy(payload
+ payload_len
, buf
, len
);
3462 spin_unlock(&tpg
->tpg_np_lock
);
3464 spin_unlock(&tiqn
->tiqn_tpg_lock
);
3469 if (cmd
->cmd_flags
& IFC_SENDTARGETS_SINGLE
)
3472 spin_unlock(&tiqn_lock
);
3474 cmd
->buf_ptr
= payload
;
3480 iscsit_build_text_rsp(struct iscsi_cmd
*cmd
, struct iscsi_conn
*conn
,
3481 struct iscsi_text_rsp
*hdr
)
3483 int text_length
, padding
;
3485 text_length
= iscsit_build_sendtargets_response(cmd
);
3486 if (text_length
< 0)
3489 hdr
->opcode
= ISCSI_OP_TEXT_RSP
;
3490 hdr
->flags
|= ISCSI_FLAG_CMD_FINAL
;
3491 padding
= ((-text_length
) & 3);
3492 hton24(hdr
->dlength
, text_length
);
3493 hdr
->itt
= cmd
->init_task_tag
;
3494 hdr
->ttt
= cpu_to_be32(cmd
->targ_xfer_tag
);
3495 cmd
->stat_sn
= conn
->stat_sn
++;
3496 hdr
->statsn
= cpu_to_be32(cmd
->stat_sn
);
3498 iscsit_increment_maxcmdsn(cmd
, conn
->sess
);
3499 hdr
->exp_cmdsn
= cpu_to_be32(conn
->sess
->exp_cmd_sn
);
3500 hdr
->max_cmdsn
= cpu_to_be32(conn
->sess
->max_cmd_sn
);
3502 pr_debug("Built Text Response: ITT: 0x%08x, StatSN: 0x%08x,"
3503 " Length: %u, CID: %hu\n", cmd
->init_task_tag
, cmd
->stat_sn
,
3504 text_length
, conn
->cid
);
3506 return text_length
+ padding
;
3508 EXPORT_SYMBOL(iscsit_build_text_rsp
);
3511 * FIXME: Add support for F_BIT and C_BIT when the length is longer than
3512 * MaxRecvDataSegmentLength.
3514 static int iscsit_send_text_rsp(
3515 struct iscsi_cmd
*cmd
,
3516 struct iscsi_conn
*conn
)
3518 struct iscsi_text_rsp
*hdr
= (struct iscsi_text_rsp
*)cmd
->pdu
;
3521 int text_length
, iov_count
= 0, rc
;
3523 rc
= iscsit_build_text_rsp(cmd
, conn
, hdr
);
3528 iov
= &cmd
->iov_misc
[0];
3529 iov
[iov_count
].iov_base
= cmd
->pdu
;
3530 iov
[iov_count
++].iov_len
= ISCSI_HDR_LEN
;
3531 iov
[iov_count
].iov_base
= cmd
->buf_ptr
;
3532 iov
[iov_count
++].iov_len
= text_length
;
3534 tx_size
+= (ISCSI_HDR_LEN
+ text_length
);
3536 if (conn
->conn_ops
->HeaderDigest
) {
3537 u32
*header_digest
= (u32
*)&cmd
->pdu
[ISCSI_HDR_LEN
];
3539 iscsit_do_crypto_hash_buf(&conn
->conn_tx_hash
, hdr
,
3540 ISCSI_HDR_LEN
, 0, NULL
, (u8
*)header_digest
);
3542 iov
[0].iov_len
+= ISCSI_CRC_LEN
;
3543 tx_size
+= ISCSI_CRC_LEN
;
3544 pr_debug("Attaching CRC32 HeaderDigest for"
3545 " Text Response PDU 0x%08x\n", *header_digest
);
3548 if (conn
->conn_ops
->DataDigest
) {
3549 iscsit_do_crypto_hash_buf(&conn
->conn_tx_hash
,
3550 cmd
->buf_ptr
, text_length
,
3551 0, NULL
, (u8
*)&cmd
->data_crc
);
3553 iov
[iov_count
].iov_base
= &cmd
->data_crc
;
3554 iov
[iov_count
++].iov_len
= ISCSI_CRC_LEN
;
3555 tx_size
+= ISCSI_CRC_LEN
;
3557 pr_debug("Attaching DataDigest for %u bytes of text"
3558 " data, CRC 0x%08x\n", text_length
,
3562 cmd
->iov_misc_count
= iov_count
;
3563 cmd
->tx_size
= tx_size
;
3569 iscsit_build_reject(struct iscsi_cmd
*cmd
, struct iscsi_conn
*conn
,
3570 struct iscsi_reject
*hdr
)
3572 hdr
->opcode
= ISCSI_OP_REJECT
;
3573 hdr
->reason
= cmd
->reject_reason
;
3574 hdr
->flags
|= ISCSI_FLAG_CMD_FINAL
;
3575 hton24(hdr
->dlength
, ISCSI_HDR_LEN
);
3576 hdr
->ffffffff
= cpu_to_be32(0xffffffff);
3577 cmd
->stat_sn
= conn
->stat_sn
++;
3578 hdr
->statsn
= cpu_to_be32(cmd
->stat_sn
);
3579 hdr
->exp_cmdsn
= cpu_to_be32(conn
->sess
->exp_cmd_sn
);
3580 hdr
->max_cmdsn
= cpu_to_be32(conn
->sess
->max_cmd_sn
);
3583 EXPORT_SYMBOL(iscsit_build_reject
);
3585 static int iscsit_send_reject(
3586 struct iscsi_cmd
*cmd
,
3587 struct iscsi_conn
*conn
)
3589 struct iscsi_reject
*hdr
= (struct iscsi_reject
*)&cmd
->pdu
[0];
3591 u32 iov_count
= 0, tx_size
;
3593 iscsit_build_reject(cmd
, conn
, hdr
);
3595 iov
= &cmd
->iov_misc
[0];
3596 iov
[iov_count
].iov_base
= cmd
->pdu
;
3597 iov
[iov_count
++].iov_len
= ISCSI_HDR_LEN
;
3598 iov
[iov_count
].iov_base
= cmd
->buf_ptr
;
3599 iov
[iov_count
++].iov_len
= ISCSI_HDR_LEN
;
3601 tx_size
= (ISCSI_HDR_LEN
+ ISCSI_HDR_LEN
);
3603 if (conn
->conn_ops
->HeaderDigest
) {
3604 u32
*header_digest
= (u32
*)&cmd
->pdu
[ISCSI_HDR_LEN
];
3606 iscsit_do_crypto_hash_buf(&conn
->conn_tx_hash
, hdr
,
3607 ISCSI_HDR_LEN
, 0, NULL
, (u8
*)header_digest
);
3609 iov
[0].iov_len
+= ISCSI_CRC_LEN
;
3610 tx_size
+= ISCSI_CRC_LEN
;
3611 pr_debug("Attaching CRC32 HeaderDigest for"
3612 " REJECT PDU 0x%08x\n", *header_digest
);
3615 if (conn
->conn_ops
->DataDigest
) {
3616 iscsit_do_crypto_hash_buf(&conn
->conn_tx_hash
, cmd
->buf_ptr
,
3617 ISCSI_HDR_LEN
, 0, NULL
, (u8
*)&cmd
->data_crc
);
3619 iov
[iov_count
].iov_base
= &cmd
->data_crc
;
3620 iov
[iov_count
++].iov_len
= ISCSI_CRC_LEN
;
3621 tx_size
+= ISCSI_CRC_LEN
;
3622 pr_debug("Attaching CRC32 DataDigest for REJECT"
3623 " PDU 0x%08x\n", cmd
->data_crc
);
3626 cmd
->iov_misc_count
= iov_count
;
3627 cmd
->tx_size
= tx_size
;
3629 pr_debug("Built Reject PDU StatSN: 0x%08x, Reason: 0x%02x,"
3630 " CID: %hu\n", ntohl(hdr
->statsn
), hdr
->reason
, conn
->cid
);
3635 void iscsit_thread_get_cpumask(struct iscsi_conn
*conn
)
3637 struct iscsi_thread_set
*ts
= conn
->thread_set
;
3640 * thread_id is assigned from iscsit_global->ts_bitmap from
3641 * within iscsi_thread_set.c:iscsi_allocate_thread_sets()
3643 * Here we use thread_id to determine which CPU that this
3644 * iSCSI connection's iscsi_thread_set will be scheduled to
3647 ord
= ts
->thread_id
% cpumask_weight(cpu_online_mask
);
3648 for_each_online_cpu(cpu
) {
3650 cpumask_set_cpu(cpu
, conn
->conn_cpumask
);
3655 * This should never be reached..
3658 cpumask_setall(conn
->conn_cpumask
);
3661 static inline void iscsit_thread_check_cpumask(
3662 struct iscsi_conn
*conn
,
3663 struct task_struct
*p
,
3668 * mode == 1 signals iscsi_target_tx_thread() usage.
3669 * mode == 0 signals iscsi_target_rx_thread() usage.
3672 if (!conn
->conn_tx_reset_cpumask
)
3674 conn
->conn_tx_reset_cpumask
= 0;
3676 if (!conn
->conn_rx_reset_cpumask
)
3678 conn
->conn_rx_reset_cpumask
= 0;
3681 * Update the CPU mask for this single kthread so that
3682 * both TX and RX kthreads are scheduled to run on the
3685 memset(buf
, 0, 128);
3686 cpumask_scnprintf(buf
, 128, conn
->conn_cpumask
);
3687 set_cpus_allowed_ptr(p
, conn
->conn_cpumask
);
3691 iscsit_immediate_queue(struct iscsi_conn
*conn
, struct iscsi_cmd
*cmd
, int state
)
3696 case ISTATE_SEND_R2T
:
3697 ret
= iscsit_send_r2t(cmd
, conn
);
3702 spin_lock_bh(&conn
->cmd_lock
);
3703 list_del(&cmd
->i_conn_node
);
3704 spin_unlock_bh(&conn
->cmd_lock
);
3706 iscsit_free_cmd(cmd
, false);
3708 case ISTATE_SEND_NOPIN_WANT_RESPONSE
:
3709 iscsit_mod_nopin_response_timer(conn
);
3710 ret
= iscsit_send_unsolicited_nopin(cmd
, conn
, 1);
3714 case ISTATE_SEND_NOPIN_NO_RESPONSE
:
3715 ret
= iscsit_send_unsolicited_nopin(cmd
, conn
, 0);
3720 pr_err("Unknown Opcode: 0x%02x ITT:"
3721 " 0x%08x, i_state: %d on CID: %hu\n",
3722 cmd
->iscsi_opcode
, cmd
->init_task_tag
, state
,
3734 iscsit_handle_immediate_queue(struct iscsi_conn
*conn
)
3736 struct iscsit_transport
*t
= conn
->conn_transport
;
3737 struct iscsi_queue_req
*qr
;
3738 struct iscsi_cmd
*cmd
;
3742 while ((qr
= iscsit_get_cmd_from_immediate_queue(conn
))) {
3743 atomic_set(&conn
->check_immediate_queue
, 0);
3746 kmem_cache_free(lio_qr_cache
, qr
);
3748 ret
= t
->iscsit_immediate_queue(conn
, cmd
, state
);
3757 iscsit_response_queue(struct iscsi_conn
*conn
, struct iscsi_cmd
*cmd
, int state
)
3763 case ISTATE_SEND_DATAIN
:
3764 ret
= iscsit_send_datain(cmd
, conn
);
3769 goto check_rsp_state
;
3770 else if (ret
== 1) {
3772 spin_lock_bh(&cmd
->istate_lock
);
3773 cmd
->i_state
= ISTATE_SENT_STATUS
;
3774 spin_unlock_bh(&cmd
->istate_lock
);
3776 if (atomic_read(&conn
->check_immediate_queue
))
3780 } else if (ret
== 2) {
3781 /* Still must send status,
3782 SCF_TRANSPORT_TASK_SENSE was set */
3783 spin_lock_bh(&cmd
->istate_lock
);
3784 cmd
->i_state
= ISTATE_SEND_STATUS
;
3785 spin_unlock_bh(&cmd
->istate_lock
);
3786 state
= ISTATE_SEND_STATUS
;
3787 goto check_rsp_state
;
3791 case ISTATE_SEND_STATUS
:
3792 case ISTATE_SEND_STATUS_RECOVERY
:
3793 ret
= iscsit_send_response(cmd
, conn
);
3795 case ISTATE_SEND_LOGOUTRSP
:
3796 ret
= iscsit_send_logout(cmd
, conn
);
3798 case ISTATE_SEND_ASYNCMSG
:
3799 ret
= iscsit_send_conn_drop_async_message(
3802 case ISTATE_SEND_NOPIN
:
3803 ret
= iscsit_send_nopin(cmd
, conn
);
3805 case ISTATE_SEND_REJECT
:
3806 ret
= iscsit_send_reject(cmd
, conn
);
3808 case ISTATE_SEND_TASKMGTRSP
:
3809 ret
= iscsit_send_task_mgt_rsp(cmd
, conn
);
3812 ret
= iscsit_tmr_post_handler(cmd
, conn
);
3814 iscsit_fall_back_to_erl0(conn
->sess
);
3816 case ISTATE_SEND_TEXTRSP
:
3817 ret
= iscsit_send_text_rsp(cmd
, conn
);
3820 pr_err("Unknown Opcode: 0x%02x ITT:"
3821 " 0x%08x, i_state: %d on CID: %hu\n",
3822 cmd
->iscsi_opcode
, cmd
->init_task_tag
,
3829 if (iscsit_send_tx_data(cmd
, conn
, 1) < 0) {
3830 iscsit_tx_thread_wait_for_tcp(conn
);
3831 iscsit_unmap_iovec(cmd
);
3834 iscsit_unmap_iovec(cmd
);
3837 case ISTATE_SEND_LOGOUTRSP
:
3838 if (!iscsit_logout_post_handler(cmd
, conn
))
3841 case ISTATE_SEND_STATUS
:
3842 case ISTATE_SEND_ASYNCMSG
:
3843 case ISTATE_SEND_NOPIN
:
3844 case ISTATE_SEND_STATUS_RECOVERY
:
3845 case ISTATE_SEND_TEXTRSP
:
3846 case ISTATE_SEND_TASKMGTRSP
:
3847 case ISTATE_SEND_REJECT
:
3848 spin_lock_bh(&cmd
->istate_lock
);
3849 cmd
->i_state
= ISTATE_SENT_STATUS
;
3850 spin_unlock_bh(&cmd
->istate_lock
);
3853 pr_err("Unknown Opcode: 0x%02x ITT:"
3854 " 0x%08x, i_state: %d on CID: %hu\n",
3855 cmd
->iscsi_opcode
, cmd
->init_task_tag
,
3856 cmd
->i_state
, conn
->cid
);
3860 if (atomic_read(&conn
->check_immediate_queue
))
3871 static int iscsit_handle_response_queue(struct iscsi_conn
*conn
)
3873 struct iscsit_transport
*t
= conn
->conn_transport
;
3874 struct iscsi_queue_req
*qr
;
3875 struct iscsi_cmd
*cmd
;
3879 while ((qr
= iscsit_get_cmd_from_response_queue(conn
))) {
3882 kmem_cache_free(lio_qr_cache
, qr
);
3884 ret
= t
->iscsit_response_queue(conn
, cmd
, state
);
3885 if (ret
== 1 || ret
< 0)
3892 int iscsi_target_tx_thread(void *arg
)
3895 struct iscsi_conn
*conn
;
3896 struct iscsi_thread_set
*ts
= arg
;
3898 * Allow ourselves to be interrupted by SIGINT so that a
3899 * connection recovery / failure event can be triggered externally.
3901 allow_signal(SIGINT
);
3904 conn
= iscsi_tx_thread_pre_handler(ts
);
3910 while (!kthread_should_stop()) {
3912 * Ensure that both TX and RX per connection kthreads
3913 * are scheduled to run on the same CPU.
3915 iscsit_thread_check_cpumask(conn
, current
, 1);
3917 wait_event_interruptible(conn
->queues_wq
,
3918 !iscsit_conn_all_queues_empty(conn
) ||
3919 ts
->status
== ISCSI_THREAD_SET_RESET
);
3921 if ((ts
->status
== ISCSI_THREAD_SET_RESET
) ||
3922 signal_pending(current
))
3926 ret
= iscsit_handle_immediate_queue(conn
);
3930 ret
= iscsit_handle_response_queue(conn
);
3933 else if (ret
== -EAGAIN
)
3940 iscsit_take_action_for_connection_exit(conn
);
3946 static int iscsi_target_rx_opcode(struct iscsi_conn
*conn
, unsigned char *buf
)
3948 struct iscsi_hdr
*hdr
= (struct iscsi_hdr
*)buf
;
3949 struct iscsi_cmd
*cmd
;
3952 switch (hdr
->opcode
& ISCSI_OPCODE_MASK
) {
3953 case ISCSI_OP_SCSI_CMD
:
3954 cmd
= iscsit_allocate_cmd(conn
, GFP_KERNEL
);
3958 ret
= iscsit_handle_scsi_cmd(conn
, cmd
, buf
);
3960 case ISCSI_OP_SCSI_DATA_OUT
:
3961 ret
= iscsit_handle_data_out(conn
, buf
);
3963 case ISCSI_OP_NOOP_OUT
:
3965 if (hdr
->ttt
== cpu_to_be32(0xFFFFFFFF)) {
3966 cmd
= iscsit_allocate_cmd(conn
, GFP_KERNEL
);
3970 ret
= iscsit_handle_nop_out(conn
, cmd
, buf
);
3972 case ISCSI_OP_SCSI_TMFUNC
:
3973 cmd
= iscsit_allocate_cmd(conn
, GFP_KERNEL
);
3977 ret
= iscsit_handle_task_mgt_cmd(conn
, cmd
, buf
);
3980 cmd
= iscsit_allocate_cmd(conn
, GFP_KERNEL
);
3984 ret
= iscsit_handle_text_cmd(conn
, cmd
, buf
);
3986 case ISCSI_OP_LOGOUT
:
3987 cmd
= iscsit_allocate_cmd(conn
, GFP_KERNEL
);
3991 ret
= iscsit_handle_logout_cmd(conn
, cmd
, buf
);
3993 wait_for_completion_timeout(&conn
->conn_logout_comp
,
3994 SECONDS_FOR_LOGOUT_COMP
* HZ
);
3996 case ISCSI_OP_SNACK
:
3997 ret
= iscsit_handle_snack(conn
, buf
);
4000 pr_err("Got unknown iSCSI OpCode: 0x%02x\n", hdr
->opcode
);
4001 if (!conn
->sess
->sess_ops
->ErrorRecoveryLevel
) {
4002 pr_err("Cannot recover from unknown"
4003 " opcode while ERL=0, closing iSCSI connection.\n");
4006 if (!conn
->conn_ops
->OFMarker
) {
4007 pr_err("Unable to recover from unknown"
4008 " opcode while OFMarker=No, closing iSCSI"
4012 if (iscsit_recover_from_unknown_opcode(conn
) < 0) {
4013 pr_err("Unable to recover from unknown"
4014 " opcode, closing iSCSI connection.\n");
4022 return iscsit_add_reject(conn
, ISCSI_REASON_BOOKMARK_NO_RESOURCES
, buf
);
4025 int iscsi_target_rx_thread(void *arg
)
4028 u8 buffer
[ISCSI_HDR_LEN
], opcode
;
4029 u32 checksum
= 0, digest
= 0;
4030 struct iscsi_conn
*conn
= NULL
;
4031 struct iscsi_thread_set
*ts
= arg
;
4034 * Allow ourselves to be interrupted by SIGINT so that a
4035 * connection recovery / failure event can be triggered externally.
4037 allow_signal(SIGINT
);
4040 conn
= iscsi_rx_thread_pre_handler(ts
);
4044 if (conn
->conn_transport
->transport_type
== ISCSI_INFINIBAND
) {
4045 struct completion comp
;
4048 init_completion(&comp
);
4049 rc
= wait_for_completion_interruptible(&comp
);
4056 while (!kthread_should_stop()) {
4058 * Ensure that both TX and RX per connection kthreads
4059 * are scheduled to run on the same CPU.
4061 iscsit_thread_check_cpumask(conn
, current
, 0);
4063 memset(buffer
, 0, ISCSI_HDR_LEN
);
4064 memset(&iov
, 0, sizeof(struct kvec
));
4066 iov
.iov_base
= buffer
;
4067 iov
.iov_len
= ISCSI_HDR_LEN
;
4069 ret
= rx_data(conn
, &iov
, 1, ISCSI_HDR_LEN
);
4070 if (ret
!= ISCSI_HDR_LEN
) {
4071 iscsit_rx_thread_wait_for_tcp(conn
);
4075 if (conn
->conn_ops
->HeaderDigest
) {
4076 iov
.iov_base
= &digest
;
4077 iov
.iov_len
= ISCSI_CRC_LEN
;
4079 ret
= rx_data(conn
, &iov
, 1, ISCSI_CRC_LEN
);
4080 if (ret
!= ISCSI_CRC_LEN
) {
4081 iscsit_rx_thread_wait_for_tcp(conn
);
4085 iscsit_do_crypto_hash_buf(&conn
->conn_rx_hash
,
4086 buffer
, ISCSI_HDR_LEN
,
4087 0, NULL
, (u8
*)&checksum
);
4089 if (digest
!= checksum
) {
4090 pr_err("HeaderDigest CRC32C failed,"
4091 " received 0x%08x, computed 0x%08x\n",
4094 * Set the PDU to 0xff so it will intentionally
4095 * hit default in the switch below.
4097 memset(buffer
, 0xff, ISCSI_HDR_LEN
);
4098 atomic_long_inc(&conn
->sess
->conn_digest_errors
);
4100 pr_debug("Got HeaderDigest CRC32C"
4101 " 0x%08x\n", checksum
);
4105 if (conn
->conn_state
== TARG_CONN_STATE_IN_LOGOUT
)
4108 opcode
= buffer
[0] & ISCSI_OPCODE_MASK
;
4110 if (conn
->sess
->sess_ops
->SessionType
&&
4111 ((!(opcode
& ISCSI_OP_TEXT
)) ||
4112 (!(opcode
& ISCSI_OP_LOGOUT
)))) {
4113 pr_err("Received illegal iSCSI Opcode: 0x%02x"
4114 " while in Discovery Session, rejecting.\n", opcode
);
4115 iscsit_add_reject(conn
, ISCSI_REASON_PROTOCOL_ERROR
,
4120 ret
= iscsi_target_rx_opcode(conn
, buffer
);
4126 if (!signal_pending(current
))
4127 atomic_set(&conn
->transport_failed
, 1);
4128 iscsit_take_action_for_connection_exit(conn
);
4134 static void iscsit_release_commands_from_conn(struct iscsi_conn
*conn
)
4136 struct iscsi_cmd
*cmd
= NULL
, *cmd_tmp
= NULL
;
4137 struct iscsi_session
*sess
= conn
->sess
;
4139 * We expect this function to only ever be called from either RX or TX
4140 * thread context via iscsit_close_connection() once the other context
4141 * has been reset -> returned sleeping pre-handler state.
4143 spin_lock_bh(&conn
->cmd_lock
);
4144 list_for_each_entry_safe(cmd
, cmd_tmp
, &conn
->conn_cmd_list
, i_conn_node
) {
4146 list_del(&cmd
->i_conn_node
);
4147 spin_unlock_bh(&conn
->cmd_lock
);
4149 iscsit_increment_maxcmdsn(cmd
, sess
);
4151 iscsit_free_cmd(cmd
, true);
4153 spin_lock_bh(&conn
->cmd_lock
);
4155 spin_unlock_bh(&conn
->cmd_lock
);
4158 static void iscsit_stop_timers_for_cmds(
4159 struct iscsi_conn
*conn
)
4161 struct iscsi_cmd
*cmd
;
4163 spin_lock_bh(&conn
->cmd_lock
);
4164 list_for_each_entry(cmd
, &conn
->conn_cmd_list
, i_conn_node
) {
4165 if (cmd
->data_direction
== DMA_TO_DEVICE
)
4166 iscsit_stop_dataout_timer(cmd
);
4168 spin_unlock_bh(&conn
->cmd_lock
);
4171 int iscsit_close_connection(
4172 struct iscsi_conn
*conn
)
4174 int conn_logout
= (conn
->conn_state
== TARG_CONN_STATE_IN_LOGOUT
);
4175 struct iscsi_session
*sess
= conn
->sess
;
4177 pr_debug("Closing iSCSI connection CID %hu on SID:"
4178 " %u\n", conn
->cid
, sess
->sid
);
4180 * Always up conn_logout_comp just in case the RX Thread is sleeping
4181 * and the logout response never got sent because the connection
4184 complete(&conn
->conn_logout_comp
);
4186 iscsi_release_thread_set(conn
);
4188 iscsit_stop_timers_for_cmds(conn
);
4189 iscsit_stop_nopin_response_timer(conn
);
4190 iscsit_stop_nopin_timer(conn
);
4191 iscsit_free_queue_reqs_for_conn(conn
);
4194 * During Connection recovery drop unacknowledged out of order
4195 * commands for this connection, and prepare the other commands
4198 * During normal operation clear the out of order commands (but
4199 * do not free the struct iscsi_ooo_cmdsn's) and release all
4200 * struct iscsi_cmds.
4202 if (atomic_read(&conn
->connection_recovery
)) {
4203 iscsit_discard_unacknowledged_ooo_cmdsns_for_conn(conn
);
4204 iscsit_prepare_cmds_for_realligance(conn
);
4206 iscsit_clear_ooo_cmdsns_for_conn(conn
);
4207 iscsit_release_commands_from_conn(conn
);
4211 * Handle decrementing session or connection usage count if
4212 * a logout response was not able to be sent because the
4213 * connection failed. Fall back to Session Recovery here.
4215 if (atomic_read(&conn
->conn_logout_remove
)) {
4216 if (conn
->conn_logout_reason
== ISCSI_LOGOUT_REASON_CLOSE_SESSION
) {
4217 iscsit_dec_conn_usage_count(conn
);
4218 iscsit_dec_session_usage_count(sess
);
4220 if (conn
->conn_logout_reason
== ISCSI_LOGOUT_REASON_CLOSE_CONNECTION
)
4221 iscsit_dec_conn_usage_count(conn
);
4223 atomic_set(&conn
->conn_logout_remove
, 0);
4224 atomic_set(&sess
->session_reinstatement
, 0);
4225 atomic_set(&sess
->session_fall_back_to_erl0
, 1);
4228 spin_lock_bh(&sess
->conn_lock
);
4229 list_del(&conn
->conn_list
);
4232 * Attempt to let the Initiator know this connection failed by
4233 * sending an Connection Dropped Async Message on another
4234 * active connection.
4236 if (atomic_read(&conn
->connection_recovery
))
4237 iscsit_build_conn_drop_async_message(conn
);
4239 spin_unlock_bh(&sess
->conn_lock
);
4242 * If connection reinstatement is being performed on this connection,
4243 * up the connection reinstatement semaphore that is being blocked on
4244 * in iscsit_cause_connection_reinstatement().
4246 spin_lock_bh(&conn
->state_lock
);
4247 if (atomic_read(&conn
->sleep_on_conn_wait_comp
)) {
4248 spin_unlock_bh(&conn
->state_lock
);
4249 complete(&conn
->conn_wait_comp
);
4250 wait_for_completion(&conn
->conn_post_wait_comp
);
4251 spin_lock_bh(&conn
->state_lock
);
4255 * If connection reinstatement is being performed on this connection
4256 * by receiving a REMOVECONNFORRECOVERY logout request, up the
4257 * connection wait rcfr semaphore that is being blocked on
4258 * an iscsit_connection_reinstatement_rcfr().
4260 if (atomic_read(&conn
->connection_wait_rcfr
)) {
4261 spin_unlock_bh(&conn
->state_lock
);
4262 complete(&conn
->conn_wait_rcfr_comp
);
4263 wait_for_completion(&conn
->conn_post_wait_comp
);
4264 spin_lock_bh(&conn
->state_lock
);
4266 atomic_set(&conn
->connection_reinstatement
, 1);
4267 spin_unlock_bh(&conn
->state_lock
);
4270 * If any other processes are accessing this connection pointer we
4271 * must wait until they have completed.
4273 iscsit_check_conn_usage_count(conn
);
4275 if (conn
->conn_rx_hash
.tfm
)
4276 crypto_free_hash(conn
->conn_rx_hash
.tfm
);
4277 if (conn
->conn_tx_hash
.tfm
)
4278 crypto_free_hash(conn
->conn_tx_hash
.tfm
);
4280 if (conn
->conn_cpumask
)
4281 free_cpumask_var(conn
->conn_cpumask
);
4283 kfree(conn
->conn_ops
);
4284 conn
->conn_ops
= NULL
;
4287 sock_release(conn
->sock
);
4289 if (conn
->conn_transport
->iscsit_free_conn
)
4290 conn
->conn_transport
->iscsit_free_conn(conn
);
4292 iscsit_put_transport(conn
->conn_transport
);
4294 conn
->thread_set
= NULL
;
4296 pr_debug("Moving to TARG_CONN_STATE_FREE.\n");
4297 conn
->conn_state
= TARG_CONN_STATE_FREE
;
4300 spin_lock_bh(&sess
->conn_lock
);
4301 atomic_dec(&sess
->nconn
);
4302 pr_debug("Decremented iSCSI connection count to %hu from node:"
4303 " %s\n", atomic_read(&sess
->nconn
),
4304 sess
->sess_ops
->InitiatorName
);
4306 * Make sure that if one connection fails in an non ERL=2 iSCSI
4307 * Session that they all fail.
4309 if ((sess
->sess_ops
->ErrorRecoveryLevel
!= 2) && !conn_logout
&&
4310 !atomic_read(&sess
->session_logout
))
4311 atomic_set(&sess
->session_fall_back_to_erl0
, 1);
4314 * If this was not the last connection in the session, and we are
4315 * performing session reinstatement or falling back to ERL=0, call
4316 * iscsit_stop_session() without sleeping to shutdown the other
4317 * active connections.
4319 if (atomic_read(&sess
->nconn
)) {
4320 if (!atomic_read(&sess
->session_reinstatement
) &&
4321 !atomic_read(&sess
->session_fall_back_to_erl0
)) {
4322 spin_unlock_bh(&sess
->conn_lock
);
4325 if (!atomic_read(&sess
->session_stop_active
)) {
4326 atomic_set(&sess
->session_stop_active
, 1);
4327 spin_unlock_bh(&sess
->conn_lock
);
4328 iscsit_stop_session(sess
, 0, 0);
4331 spin_unlock_bh(&sess
->conn_lock
);
4336 * If this was the last connection in the session and one of the
4337 * following is occurring:
4339 * Session Reinstatement is not being performed, and are falling back
4340 * to ERL=0 call iscsit_close_session().
4342 * Session Logout was requested. iscsit_close_session() will be called
4345 * Session Continuation is not being performed, start the Time2Retain
4346 * handler and check if sleep_on_sess_wait_sem is active.
4348 if (!atomic_read(&sess
->session_reinstatement
) &&
4349 atomic_read(&sess
->session_fall_back_to_erl0
)) {
4350 spin_unlock_bh(&sess
->conn_lock
);
4351 target_put_session(sess
->se_sess
);
4354 } else if (atomic_read(&sess
->session_logout
)) {
4355 pr_debug("Moving to TARG_SESS_STATE_FREE.\n");
4356 sess
->session_state
= TARG_SESS_STATE_FREE
;
4357 spin_unlock_bh(&sess
->conn_lock
);
4359 if (atomic_read(&sess
->sleep_on_sess_wait_comp
))
4360 complete(&sess
->session_wait_comp
);
4364 pr_debug("Moving to TARG_SESS_STATE_FAILED.\n");
4365 sess
->session_state
= TARG_SESS_STATE_FAILED
;
4367 if (!atomic_read(&sess
->session_continuation
)) {
4368 spin_unlock_bh(&sess
->conn_lock
);
4369 iscsit_start_time2retain_handler(sess
);
4371 spin_unlock_bh(&sess
->conn_lock
);
4373 if (atomic_read(&sess
->sleep_on_sess_wait_comp
))
4374 complete(&sess
->session_wait_comp
);
4378 spin_unlock_bh(&sess
->conn_lock
);
4383 int iscsit_close_session(struct iscsi_session
*sess
)
4385 struct iscsi_portal_group
*tpg
= sess
->tpg
;
4386 struct se_portal_group
*se_tpg
= &tpg
->tpg_se_tpg
;
4388 if (atomic_read(&sess
->nconn
)) {
4389 pr_err("%d connection(s) still exist for iSCSI session"
4390 " to %s\n", atomic_read(&sess
->nconn
),
4391 sess
->sess_ops
->InitiatorName
);
4395 spin_lock_bh(&se_tpg
->session_lock
);
4396 atomic_set(&sess
->session_logout
, 1);
4397 atomic_set(&sess
->session_reinstatement
, 1);
4398 iscsit_stop_time2retain_timer(sess
);
4399 spin_unlock_bh(&se_tpg
->session_lock
);
4402 * transport_deregister_session_configfs() will clear the
4403 * struct se_node_acl->nacl_sess pointer now as a iscsi_np process context
4404 * can be setting it again with __transport_register_session() in
4405 * iscsi_post_login_handler() again after the iscsit_stop_session()
4406 * completes in iscsi_np context.
4408 transport_deregister_session_configfs(sess
->se_sess
);
4411 * If any other processes are accessing this session pointer we must
4412 * wait until they have completed. If we are in an interrupt (the
4413 * time2retain handler) and contain and active session usage count we
4414 * restart the timer and exit.
4416 if (!in_interrupt()) {
4417 if (iscsit_check_session_usage_count(sess
) == 1)
4418 iscsit_stop_session(sess
, 1, 1);
4420 if (iscsit_check_session_usage_count(sess
) == 2) {
4421 atomic_set(&sess
->session_logout
, 0);
4422 iscsit_start_time2retain_handler(sess
);
4427 transport_deregister_session(sess
->se_sess
);
4429 if (sess
->sess_ops
->ErrorRecoveryLevel
== 2)
4430 iscsit_free_connection_recovery_entires(sess
);
4432 iscsit_free_all_ooo_cmdsns(sess
);
4434 spin_lock_bh(&se_tpg
->session_lock
);
4435 pr_debug("Moving to TARG_SESS_STATE_FREE.\n");
4436 sess
->session_state
= TARG_SESS_STATE_FREE
;
4437 pr_debug("Released iSCSI session from node: %s\n",
4438 sess
->sess_ops
->InitiatorName
);
4441 tpg
->tpg_tiqn
->tiqn_nsessions
--;
4443 pr_debug("Decremented number of active iSCSI Sessions on"
4444 " iSCSI TPG: %hu to %u\n", tpg
->tpgt
, tpg
->nsessions
);
4446 spin_lock(&sess_idr_lock
);
4447 idr_remove(&sess_idr
, sess
->session_index
);
4448 spin_unlock(&sess_idr_lock
);
4450 kfree(sess
->sess_ops
);
4451 sess
->sess_ops
= NULL
;
4452 spin_unlock_bh(&se_tpg
->session_lock
);
4458 static void iscsit_logout_post_handler_closesession(
4459 struct iscsi_conn
*conn
)
4461 struct iscsi_session
*sess
= conn
->sess
;
4463 iscsi_set_thread_clear(conn
, ISCSI_CLEAR_TX_THREAD
);
4464 iscsi_set_thread_set_signal(conn
, ISCSI_SIGNAL_TX_THREAD
);
4466 atomic_set(&conn
->conn_logout_remove
, 0);
4467 complete(&conn
->conn_logout_comp
);
4469 iscsit_dec_conn_usage_count(conn
);
4470 iscsit_stop_session(sess
, 1, 1);
4471 iscsit_dec_session_usage_count(sess
);
4472 target_put_session(sess
->se_sess
);
4475 static void iscsit_logout_post_handler_samecid(
4476 struct iscsi_conn
*conn
)
4478 iscsi_set_thread_clear(conn
, ISCSI_CLEAR_TX_THREAD
);
4479 iscsi_set_thread_set_signal(conn
, ISCSI_SIGNAL_TX_THREAD
);
4481 atomic_set(&conn
->conn_logout_remove
, 0);
4482 complete(&conn
->conn_logout_comp
);
4484 iscsit_cause_connection_reinstatement(conn
, 1);
4485 iscsit_dec_conn_usage_count(conn
);
4488 static void iscsit_logout_post_handler_diffcid(
4489 struct iscsi_conn
*conn
,
4492 struct iscsi_conn
*l_conn
;
4493 struct iscsi_session
*sess
= conn
->sess
;
4498 spin_lock_bh(&sess
->conn_lock
);
4499 list_for_each_entry(l_conn
, &sess
->sess_conn_list
, conn_list
) {
4500 if (l_conn
->cid
== cid
) {
4501 iscsit_inc_conn_usage_count(l_conn
);
4505 spin_unlock_bh(&sess
->conn_lock
);
4511 l_conn
->sock
->ops
->shutdown(l_conn
->sock
, RCV_SHUTDOWN
);
4513 spin_lock_bh(&l_conn
->state_lock
);
4514 pr_debug("Moving to TARG_CONN_STATE_IN_LOGOUT.\n");
4515 l_conn
->conn_state
= TARG_CONN_STATE_IN_LOGOUT
;
4516 spin_unlock_bh(&l_conn
->state_lock
);
4518 iscsit_cause_connection_reinstatement(l_conn
, 1);
4519 iscsit_dec_conn_usage_count(l_conn
);
4523 * Return of 0 causes the TX thread to restart.
4525 int iscsit_logout_post_handler(
4526 struct iscsi_cmd
*cmd
,
4527 struct iscsi_conn
*conn
)
4531 switch (cmd
->logout_reason
) {
4532 case ISCSI_LOGOUT_REASON_CLOSE_SESSION
:
4533 switch (cmd
->logout_response
) {
4534 case ISCSI_LOGOUT_SUCCESS
:
4535 case ISCSI_LOGOUT_CLEANUP_FAILED
:
4537 iscsit_logout_post_handler_closesession(conn
);
4542 case ISCSI_LOGOUT_REASON_CLOSE_CONNECTION
:
4543 if (conn
->cid
== cmd
->logout_cid
) {
4544 switch (cmd
->logout_response
) {
4545 case ISCSI_LOGOUT_SUCCESS
:
4546 case ISCSI_LOGOUT_CLEANUP_FAILED
:
4548 iscsit_logout_post_handler_samecid(conn
);
4553 switch (cmd
->logout_response
) {
4554 case ISCSI_LOGOUT_SUCCESS
:
4555 iscsit_logout_post_handler_diffcid(conn
,
4558 case ISCSI_LOGOUT_CID_NOT_FOUND
:
4559 case ISCSI_LOGOUT_CLEANUP_FAILED
:
4566 case ISCSI_LOGOUT_REASON_RECOVERY
:
4567 switch (cmd
->logout_response
) {
4568 case ISCSI_LOGOUT_SUCCESS
:
4569 case ISCSI_LOGOUT_CID_NOT_FOUND
:
4570 case ISCSI_LOGOUT_RECOVERY_UNSUPPORTED
:
4571 case ISCSI_LOGOUT_CLEANUP_FAILED
:
4583 EXPORT_SYMBOL(iscsit_logout_post_handler
);
4585 void iscsit_fail_session(struct iscsi_session
*sess
)
4587 struct iscsi_conn
*conn
;
4589 spin_lock_bh(&sess
->conn_lock
);
4590 list_for_each_entry(conn
, &sess
->sess_conn_list
, conn_list
) {
4591 pr_debug("Moving to TARG_CONN_STATE_CLEANUP_WAIT.\n");
4592 conn
->conn_state
= TARG_CONN_STATE_CLEANUP_WAIT
;
4594 spin_unlock_bh(&sess
->conn_lock
);
4596 pr_debug("Moving to TARG_SESS_STATE_FAILED.\n");
4597 sess
->session_state
= TARG_SESS_STATE_FAILED
;
4600 int iscsit_free_session(struct iscsi_session
*sess
)
4602 u16 conn_count
= atomic_read(&sess
->nconn
);
4603 struct iscsi_conn
*conn
, *conn_tmp
= NULL
;
4606 spin_lock_bh(&sess
->conn_lock
);
4607 atomic_set(&sess
->sleep_on_sess_wait_comp
, 1);
4609 list_for_each_entry_safe(conn
, conn_tmp
, &sess
->sess_conn_list
,
4611 if (conn_count
== 0)
4614 if (list_is_last(&conn
->conn_list
, &sess
->sess_conn_list
)) {
4617 iscsit_inc_conn_usage_count(conn_tmp
);
4620 iscsit_inc_conn_usage_count(conn
);
4622 spin_unlock_bh(&sess
->conn_lock
);
4623 iscsit_cause_connection_reinstatement(conn
, 1);
4624 spin_lock_bh(&sess
->conn_lock
);
4626 iscsit_dec_conn_usage_count(conn
);
4628 iscsit_dec_conn_usage_count(conn_tmp
);
4633 if (atomic_read(&sess
->nconn
)) {
4634 spin_unlock_bh(&sess
->conn_lock
);
4635 wait_for_completion(&sess
->session_wait_comp
);
4637 spin_unlock_bh(&sess
->conn_lock
);
4639 target_put_session(sess
->se_sess
);
4643 void iscsit_stop_session(
4644 struct iscsi_session
*sess
,
4646 int connection_sleep
)
4648 u16 conn_count
= atomic_read(&sess
->nconn
);
4649 struct iscsi_conn
*conn
, *conn_tmp
= NULL
;
4652 spin_lock_bh(&sess
->conn_lock
);
4654 atomic_set(&sess
->sleep_on_sess_wait_comp
, 1);
4656 if (connection_sleep
) {
4657 list_for_each_entry_safe(conn
, conn_tmp
, &sess
->sess_conn_list
,
4659 if (conn_count
== 0)
4662 if (list_is_last(&conn
->conn_list
, &sess
->sess_conn_list
)) {
4665 iscsit_inc_conn_usage_count(conn_tmp
);
4668 iscsit_inc_conn_usage_count(conn
);
4670 spin_unlock_bh(&sess
->conn_lock
);
4671 iscsit_cause_connection_reinstatement(conn
, 1);
4672 spin_lock_bh(&sess
->conn_lock
);
4674 iscsit_dec_conn_usage_count(conn
);
4676 iscsit_dec_conn_usage_count(conn_tmp
);
4680 list_for_each_entry(conn
, &sess
->sess_conn_list
, conn_list
)
4681 iscsit_cause_connection_reinstatement(conn
, 0);
4684 if (session_sleep
&& atomic_read(&sess
->nconn
)) {
4685 spin_unlock_bh(&sess
->conn_lock
);
4686 wait_for_completion(&sess
->session_wait_comp
);
4688 spin_unlock_bh(&sess
->conn_lock
);
4691 int iscsit_release_sessions_for_tpg(struct iscsi_portal_group
*tpg
, int force
)
4693 struct iscsi_session
*sess
;
4694 struct se_portal_group
*se_tpg
= &tpg
->tpg_se_tpg
;
4695 struct se_session
*se_sess
, *se_sess_tmp
;
4696 int session_count
= 0;
4698 spin_lock_bh(&se_tpg
->session_lock
);
4699 if (tpg
->nsessions
&& !force
) {
4700 spin_unlock_bh(&se_tpg
->session_lock
);
4704 list_for_each_entry_safe(se_sess
, se_sess_tmp
, &se_tpg
->tpg_sess_list
,
4706 sess
= (struct iscsi_session
*)se_sess
->fabric_sess_ptr
;
4708 spin_lock(&sess
->conn_lock
);
4709 if (atomic_read(&sess
->session_fall_back_to_erl0
) ||
4710 atomic_read(&sess
->session_logout
) ||
4711 (sess
->time2retain_timer_flags
& ISCSI_TF_EXPIRED
)) {
4712 spin_unlock(&sess
->conn_lock
);
4715 atomic_set(&sess
->session_reinstatement
, 1);
4716 spin_unlock(&sess
->conn_lock
);
4717 spin_unlock_bh(&se_tpg
->session_lock
);
4719 iscsit_free_session(sess
);
4720 spin_lock_bh(&se_tpg
->session_lock
);
4724 spin_unlock_bh(&se_tpg
->session_lock
);
4726 pr_debug("Released %d iSCSI Session(s) from Target Portal"
4727 " Group: %hu\n", session_count
, tpg
->tpgt
);
4731 MODULE_DESCRIPTION("iSCSI-Target Driver for mainline target infrastructure");
4732 MODULE_VERSION("4.1.x");
4733 MODULE_AUTHOR("nab@Linux-iSCSI.org");
4734 MODULE_LICENSE("GPL");
4736 module_init(iscsi_target_init_module
);
4737 module_exit(iscsi_target_cleanup_module
);