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
);
470 np
->np_transport
->iscsit_free_np(np
);
472 spin_lock_bh(&np_lock
);
473 list_del(&np
->np_list
);
474 spin_unlock_bh(&np_lock
);
476 pr_debug("CORE[0] - Removed Network Portal: %s:%hu on %s\n",
477 np
->np_ip
, np
->np_port
, np
->np_transport
->name
);
479 iscsit_put_transport(np
->np_transport
);
484 static int iscsit_immediate_queue(struct iscsi_conn
*, struct iscsi_cmd
*, int);
485 static int iscsit_response_queue(struct iscsi_conn
*, struct iscsi_cmd
*, int);
487 static int iscsit_queue_rsp(struct iscsi_conn
*conn
, struct iscsi_cmd
*cmd
)
489 iscsit_add_cmd_to_response_queue(cmd
, cmd
->conn
, cmd
->i_state
);
493 static struct iscsit_transport iscsi_target_transport
= {
495 .transport_type
= ISCSI_TCP
,
497 .iscsit_setup_np
= iscsit_setup_np
,
498 .iscsit_accept_np
= iscsit_accept_np
,
499 .iscsit_free_np
= iscsit_free_np
,
500 .iscsit_get_login_rx
= iscsit_get_login_rx
,
501 .iscsit_put_login_tx
= iscsit_put_login_tx
,
502 .iscsit_get_dataout
= iscsit_build_r2ts_for_cmd
,
503 .iscsit_immediate_queue
= iscsit_immediate_queue
,
504 .iscsit_response_queue
= iscsit_response_queue
,
505 .iscsit_queue_data_in
= iscsit_queue_rsp
,
506 .iscsit_queue_status
= iscsit_queue_rsp
,
509 static int __init
iscsi_target_init_module(void)
513 pr_debug("iSCSI-Target "ISCSIT_VERSION
"\n");
515 iscsit_global
= kzalloc(sizeof(struct iscsit_global
), GFP_KERNEL
);
516 if (!iscsit_global
) {
517 pr_err("Unable to allocate memory for iscsit_global\n");
520 mutex_init(&auth_id_lock
);
521 spin_lock_init(&sess_idr_lock
);
525 ret
= iscsi_target_register_configfs();
529 ret
= iscsi_thread_set_init();
533 if (iscsi_allocate_thread_sets(TARGET_THREAD_SET_COUNT
) !=
534 TARGET_THREAD_SET_COUNT
) {
535 pr_err("iscsi_allocate_thread_sets() returned"
536 " unexpected value!\n");
540 lio_qr_cache
= kmem_cache_create("lio_qr_cache",
541 sizeof(struct iscsi_queue_req
),
542 __alignof__(struct iscsi_queue_req
), 0, NULL
);
544 pr_err("nable to kmem_cache_create() for"
549 lio_dr_cache
= kmem_cache_create("lio_dr_cache",
550 sizeof(struct iscsi_datain_req
),
551 __alignof__(struct iscsi_datain_req
), 0, NULL
);
553 pr_err("Unable to kmem_cache_create() for"
558 lio_ooo_cache
= kmem_cache_create("lio_ooo_cache",
559 sizeof(struct iscsi_ooo_cmdsn
),
560 __alignof__(struct iscsi_ooo_cmdsn
), 0, NULL
);
561 if (!lio_ooo_cache
) {
562 pr_err("Unable to kmem_cache_create() for"
567 lio_r2t_cache
= kmem_cache_create("lio_r2t_cache",
568 sizeof(struct iscsi_r2t
), __alignof__(struct iscsi_r2t
),
570 if (!lio_r2t_cache
) {
571 pr_err("Unable to kmem_cache_create() for"
576 iscsit_register_transport(&iscsi_target_transport
);
578 if (iscsit_load_discovery_tpg() < 0)
583 kmem_cache_destroy(lio_r2t_cache
);
585 kmem_cache_destroy(lio_ooo_cache
);
587 kmem_cache_destroy(lio_dr_cache
);
589 kmem_cache_destroy(lio_qr_cache
);
591 iscsi_deallocate_thread_sets();
593 iscsi_thread_set_free();
595 iscsi_target_deregister_configfs();
597 kfree(iscsit_global
);
601 static void __exit
iscsi_target_cleanup_module(void)
603 iscsi_deallocate_thread_sets();
604 iscsi_thread_set_free();
605 iscsit_release_discovery_tpg();
606 iscsit_unregister_transport(&iscsi_target_transport
);
607 kmem_cache_destroy(lio_qr_cache
);
608 kmem_cache_destroy(lio_dr_cache
);
609 kmem_cache_destroy(lio_ooo_cache
);
610 kmem_cache_destroy(lio_r2t_cache
);
612 iscsi_target_deregister_configfs();
614 kfree(iscsit_global
);
617 static int iscsit_add_reject(
618 struct iscsi_conn
*conn
,
622 struct iscsi_cmd
*cmd
;
624 cmd
= iscsit_allocate_cmd(conn
, GFP_KERNEL
);
628 cmd
->iscsi_opcode
= ISCSI_OP_REJECT
;
629 cmd
->reject_reason
= reason
;
631 cmd
->buf_ptr
= kmemdup(buf
, ISCSI_HDR_LEN
, GFP_KERNEL
);
633 pr_err("Unable to allocate memory for cmd->buf_ptr\n");
634 iscsit_free_cmd(cmd
, false);
638 spin_lock_bh(&conn
->cmd_lock
);
639 list_add_tail(&cmd
->i_conn_node
, &conn
->conn_cmd_list
);
640 spin_unlock_bh(&conn
->cmd_lock
);
642 cmd
->i_state
= ISTATE_SEND_REJECT
;
643 iscsit_add_cmd_to_response_queue(cmd
, conn
, cmd
->i_state
);
648 static int iscsit_add_reject_from_cmd(
649 struct iscsi_cmd
*cmd
,
654 struct iscsi_conn
*conn
;
657 pr_err("cmd->conn is NULL for ITT: 0x%08x\n",
663 cmd
->iscsi_opcode
= ISCSI_OP_REJECT
;
664 cmd
->reject_reason
= reason
;
666 cmd
->buf_ptr
= kmemdup(buf
, ISCSI_HDR_LEN
, GFP_KERNEL
);
668 pr_err("Unable to allocate memory for cmd->buf_ptr\n");
669 iscsit_free_cmd(cmd
, false);
674 spin_lock_bh(&conn
->cmd_lock
);
675 list_add_tail(&cmd
->i_conn_node
, &conn
->conn_cmd_list
);
676 spin_unlock_bh(&conn
->cmd_lock
);
679 cmd
->i_state
= ISTATE_SEND_REJECT
;
680 iscsit_add_cmd_to_response_queue(cmd
, conn
, cmd
->i_state
);
682 * Perform the kref_put now if se_cmd has already been setup by
683 * scsit_setup_scsi_cmd()
685 if (cmd
->se_cmd
.se_tfo
!= NULL
) {
686 pr_debug("iscsi reject: calling target_put_sess_cmd >>>>>>\n");
687 target_put_sess_cmd(conn
->sess
->se_sess
, &cmd
->se_cmd
);
692 static int iscsit_add_reject_cmd(struct iscsi_cmd
*cmd
, u8 reason
,
695 return iscsit_add_reject_from_cmd(cmd
, reason
, true, buf
);
698 int iscsit_reject_cmd(struct iscsi_cmd
*cmd
, u8 reason
, unsigned char *buf
)
700 return iscsit_add_reject_from_cmd(cmd
, reason
, false, buf
);
704 * Map some portion of the allocated scatterlist to an iovec, suitable for
705 * kernel sockets to copy data in/out.
707 static int iscsit_map_iovec(
708 struct iscsi_cmd
*cmd
,
714 struct scatterlist
*sg
;
715 unsigned int page_off
;
718 * We know each entry in t_data_sg contains a page.
720 sg
= &cmd
->se_cmd
.t_data_sg
[data_offset
/ PAGE_SIZE
];
721 page_off
= (data_offset
% PAGE_SIZE
);
723 cmd
->first_data_sg
= sg
;
724 cmd
->first_data_sg_off
= page_off
;
726 while (data_length
) {
727 u32 cur_len
= min_t(u32
, data_length
, sg
->length
- page_off
);
729 iov
[i
].iov_base
= kmap(sg_page(sg
)) + sg
->offset
+ page_off
;
730 iov
[i
].iov_len
= cur_len
;
732 data_length
-= cur_len
;
738 cmd
->kmapped_nents
= i
;
743 static void iscsit_unmap_iovec(struct iscsi_cmd
*cmd
)
746 struct scatterlist
*sg
;
748 sg
= cmd
->first_data_sg
;
750 for (i
= 0; i
< cmd
->kmapped_nents
; i
++)
751 kunmap(sg_page(&sg
[i
]));
754 static void iscsit_ack_from_expstatsn(struct iscsi_conn
*conn
, u32 exp_statsn
)
757 struct iscsi_cmd
*cmd
, *cmd_p
;
759 conn
->exp_statsn
= exp_statsn
;
761 if (conn
->sess
->sess_ops
->RDMAExtensions
)
764 spin_lock_bh(&conn
->cmd_lock
);
765 list_for_each_entry_safe(cmd
, cmd_p
, &conn
->conn_cmd_list
, i_conn_node
) {
766 spin_lock(&cmd
->istate_lock
);
767 if ((cmd
->i_state
== ISTATE_SENT_STATUS
) &&
768 iscsi_sna_lt(cmd
->stat_sn
, exp_statsn
)) {
769 cmd
->i_state
= ISTATE_REMOVE
;
770 spin_unlock(&cmd
->istate_lock
);
771 list_move_tail(&cmd
->i_conn_node
, &ack_list
);
774 spin_unlock(&cmd
->istate_lock
);
776 spin_unlock_bh(&conn
->cmd_lock
);
778 list_for_each_entry_safe(cmd
, cmd_p
, &ack_list
, i_conn_node
) {
779 list_del(&cmd
->i_conn_node
);
780 iscsit_free_cmd(cmd
, false);
784 static int iscsit_allocate_iovecs(struct iscsi_cmd
*cmd
)
786 u32 iov_count
= max(1UL, DIV_ROUND_UP(cmd
->se_cmd
.data_length
, PAGE_SIZE
));
788 iov_count
+= ISCSI_IOV_DATA_BUFFER
;
790 cmd
->iov_data
= kzalloc(iov_count
* sizeof(struct kvec
), GFP_KERNEL
);
791 if (!cmd
->iov_data
) {
792 pr_err("Unable to allocate cmd->iov_data\n");
796 cmd
->orig_iov_data_count
= iov_count
;
800 int iscsit_setup_scsi_cmd(struct iscsi_conn
*conn
, struct iscsi_cmd
*cmd
,
803 int data_direction
, payload_length
;
804 struct iscsi_scsi_req
*hdr
;
808 atomic_long_inc(&conn
->sess
->cmd_pdus
);
810 hdr
= (struct iscsi_scsi_req
*) buf
;
811 payload_length
= ntoh24(hdr
->dlength
);
813 /* FIXME; Add checks for AdditionalHeaderSegment */
815 if (!(hdr
->flags
& ISCSI_FLAG_CMD_WRITE
) &&
816 !(hdr
->flags
& ISCSI_FLAG_CMD_FINAL
)) {
817 pr_err("ISCSI_FLAG_CMD_WRITE & ISCSI_FLAG_CMD_FINAL"
818 " not set. Bad iSCSI Initiator.\n");
819 return iscsit_add_reject_cmd(cmd
,
820 ISCSI_REASON_BOOKMARK_INVALID
, buf
);
823 if (((hdr
->flags
& ISCSI_FLAG_CMD_READ
) ||
824 (hdr
->flags
& ISCSI_FLAG_CMD_WRITE
)) && !hdr
->data_length
) {
826 * Vmware ESX v3.0 uses a modified Cisco Initiator (v3.4.2)
827 * that adds support for RESERVE/RELEASE. There is a bug
828 * add with this new functionality that sets R/W bits when
829 * neither CDB carries any READ or WRITE datapayloads.
831 if ((hdr
->cdb
[0] == 0x16) || (hdr
->cdb
[0] == 0x17)) {
832 hdr
->flags
&= ~ISCSI_FLAG_CMD_READ
;
833 hdr
->flags
&= ~ISCSI_FLAG_CMD_WRITE
;
837 pr_err("ISCSI_FLAG_CMD_READ or ISCSI_FLAG_CMD_WRITE"
838 " set when Expected Data Transfer Length is 0 for"
839 " CDB: 0x%02x. Bad iSCSI Initiator.\n", hdr
->cdb
[0]);
840 return iscsit_add_reject_cmd(cmd
,
841 ISCSI_REASON_BOOKMARK_INVALID
, buf
);
845 if (!(hdr
->flags
& ISCSI_FLAG_CMD_READ
) &&
846 !(hdr
->flags
& ISCSI_FLAG_CMD_WRITE
) && (hdr
->data_length
!= 0)) {
847 pr_err("ISCSI_FLAG_CMD_READ and/or ISCSI_FLAG_CMD_WRITE"
848 " MUST be set if Expected Data Transfer Length is not 0."
849 " Bad iSCSI Initiator\n");
850 return iscsit_add_reject_cmd(cmd
,
851 ISCSI_REASON_BOOKMARK_INVALID
, buf
);
854 if ((hdr
->flags
& ISCSI_FLAG_CMD_READ
) &&
855 (hdr
->flags
& ISCSI_FLAG_CMD_WRITE
)) {
856 pr_err("Bidirectional operations not supported!\n");
857 return iscsit_add_reject_cmd(cmd
,
858 ISCSI_REASON_BOOKMARK_INVALID
, buf
);
861 if (hdr
->opcode
& ISCSI_OP_IMMEDIATE
) {
862 pr_err("Illegally set Immediate Bit in iSCSI Initiator"
863 " Scsi Command PDU.\n");
864 return iscsit_add_reject_cmd(cmd
,
865 ISCSI_REASON_BOOKMARK_INVALID
, buf
);
868 if (payload_length
&& !conn
->sess
->sess_ops
->ImmediateData
) {
869 pr_err("ImmediateData=No but DataSegmentLength=%u,"
870 " protocol error.\n", payload_length
);
871 return iscsit_add_reject_cmd(cmd
,
872 ISCSI_REASON_PROTOCOL_ERROR
, buf
);
875 if ((be32_to_cpu(hdr
->data_length
) == payload_length
) &&
876 (!(hdr
->flags
& ISCSI_FLAG_CMD_FINAL
))) {
877 pr_err("Expected Data Transfer Length and Length of"
878 " Immediate Data are the same, but ISCSI_FLAG_CMD_FINAL"
879 " bit is not set protocol error\n");
880 return iscsit_add_reject_cmd(cmd
,
881 ISCSI_REASON_PROTOCOL_ERROR
, buf
);
884 if (payload_length
> be32_to_cpu(hdr
->data_length
)) {
885 pr_err("DataSegmentLength: %u is greater than"
886 " EDTL: %u, protocol error.\n", payload_length
,
888 return iscsit_add_reject_cmd(cmd
,
889 ISCSI_REASON_PROTOCOL_ERROR
, buf
);
892 if (payload_length
> conn
->conn_ops
->MaxXmitDataSegmentLength
) {
893 pr_err("DataSegmentLength: %u is greater than"
894 " MaxXmitDataSegmentLength: %u, protocol error.\n",
895 payload_length
, conn
->conn_ops
->MaxXmitDataSegmentLength
);
896 return iscsit_add_reject_cmd(cmd
,
897 ISCSI_REASON_PROTOCOL_ERROR
, buf
);
900 if (payload_length
> conn
->sess
->sess_ops
->FirstBurstLength
) {
901 pr_err("DataSegmentLength: %u is greater than"
902 " FirstBurstLength: %u, protocol error.\n",
903 payload_length
, conn
->sess
->sess_ops
->FirstBurstLength
);
904 return iscsit_add_reject_cmd(cmd
,
905 ISCSI_REASON_BOOKMARK_INVALID
, buf
);
908 data_direction
= (hdr
->flags
& ISCSI_FLAG_CMD_WRITE
) ? DMA_TO_DEVICE
:
909 (hdr
->flags
& ISCSI_FLAG_CMD_READ
) ? DMA_FROM_DEVICE
:
912 cmd
->data_direction
= data_direction
;
913 iscsi_task_attr
= hdr
->flags
& ISCSI_FLAG_CMD_ATTR_MASK
;
915 * Figure out the SAM Task Attribute for the incoming SCSI CDB
917 if ((iscsi_task_attr
== ISCSI_ATTR_UNTAGGED
) ||
918 (iscsi_task_attr
== ISCSI_ATTR_SIMPLE
))
919 sam_task_attr
= MSG_SIMPLE_TAG
;
920 else if (iscsi_task_attr
== ISCSI_ATTR_ORDERED
)
921 sam_task_attr
= MSG_ORDERED_TAG
;
922 else if (iscsi_task_attr
== ISCSI_ATTR_HEAD_OF_QUEUE
)
923 sam_task_attr
= MSG_HEAD_TAG
;
924 else if (iscsi_task_attr
== ISCSI_ATTR_ACA
)
925 sam_task_attr
= MSG_ACA_TAG
;
927 pr_debug("Unknown iSCSI Task Attribute: 0x%02x, using"
928 " MSG_SIMPLE_TAG\n", iscsi_task_attr
);
929 sam_task_attr
= MSG_SIMPLE_TAG
;
932 cmd
->iscsi_opcode
= ISCSI_OP_SCSI_CMD
;
933 cmd
->i_state
= ISTATE_NEW_CMD
;
934 cmd
->immediate_cmd
= ((hdr
->opcode
& ISCSI_OP_IMMEDIATE
) ? 1 : 0);
935 cmd
->immediate_data
= (payload_length
) ? 1 : 0;
936 cmd
->unsolicited_data
= ((!(hdr
->flags
& ISCSI_FLAG_CMD_FINAL
) &&
937 (hdr
->flags
& ISCSI_FLAG_CMD_WRITE
)) ? 1 : 0);
938 if (cmd
->unsolicited_data
)
939 cmd
->cmd_flags
|= ICF_NON_IMMEDIATE_UNSOLICITED_DATA
;
941 conn
->sess
->init_task_tag
= cmd
->init_task_tag
= hdr
->itt
;
942 if (hdr
->flags
& ISCSI_FLAG_CMD_READ
) {
943 spin_lock_bh(&conn
->sess
->ttt_lock
);
944 cmd
->targ_xfer_tag
= conn
->sess
->targ_xfer_tag
++;
945 if (cmd
->targ_xfer_tag
== 0xFFFFFFFF)
946 cmd
->targ_xfer_tag
= conn
->sess
->targ_xfer_tag
++;
947 spin_unlock_bh(&conn
->sess
->ttt_lock
);
948 } else if (hdr
->flags
& ISCSI_FLAG_CMD_WRITE
)
949 cmd
->targ_xfer_tag
= 0xFFFFFFFF;
950 cmd
->cmd_sn
= be32_to_cpu(hdr
->cmdsn
);
951 cmd
->exp_stat_sn
= be32_to_cpu(hdr
->exp_statsn
);
952 cmd
->first_burst_len
= payload_length
;
954 if (!conn
->sess
->sess_ops
->RDMAExtensions
&&
955 cmd
->data_direction
== DMA_FROM_DEVICE
) {
956 struct iscsi_datain_req
*dr
;
958 dr
= iscsit_allocate_datain_req();
960 return iscsit_add_reject_cmd(cmd
,
961 ISCSI_REASON_BOOKMARK_NO_RESOURCES
, buf
);
963 iscsit_attach_datain_req(cmd
, dr
);
967 * Initialize struct se_cmd descriptor from target_core_mod infrastructure
969 transport_init_se_cmd(&cmd
->se_cmd
, &lio_target_fabric_configfs
->tf_ops
,
970 conn
->sess
->se_sess
, be32_to_cpu(hdr
->data_length
),
971 cmd
->data_direction
, sam_task_attr
,
972 cmd
->sense_buffer
+ 2);
974 pr_debug("Got SCSI Command, ITT: 0x%08x, CmdSN: 0x%08x,"
975 " ExpXferLen: %u, Length: %u, CID: %hu\n", hdr
->itt
,
976 hdr
->cmdsn
, be32_to_cpu(hdr
->data_length
), payload_length
,
979 target_get_sess_cmd(conn
->sess
->se_sess
, &cmd
->se_cmd
, true);
981 cmd
->sense_reason
= transport_lookup_cmd_lun(&cmd
->se_cmd
,
982 scsilun_to_int(&hdr
->lun
));
983 if (cmd
->sense_reason
)
986 cmd
->sense_reason
= target_setup_cmd_from_cdb(&cmd
->se_cmd
, hdr
->cdb
);
987 if (cmd
->sense_reason
) {
988 if (cmd
->sense_reason
== TCM_OUT_OF_RESOURCES
) {
989 return iscsit_add_reject_cmd(cmd
,
990 ISCSI_REASON_BOOKMARK_NO_RESOURCES
, buf
);
996 if (iscsit_build_pdu_and_seq_lists(cmd
, payload_length
) < 0) {
997 return iscsit_add_reject_cmd(cmd
,
998 ISCSI_REASON_BOOKMARK_NO_RESOURCES
, buf
);
1002 spin_lock_bh(&conn
->cmd_lock
);
1003 list_add_tail(&cmd
->i_conn_node
, &conn
->conn_cmd_list
);
1004 spin_unlock_bh(&conn
->cmd_lock
);
1006 * Check if we need to delay processing because of ALUA
1007 * Active/NonOptimized primary access state..
1009 core_alua_check_nonop_delay(&cmd
->se_cmd
);
1013 EXPORT_SYMBOL(iscsit_setup_scsi_cmd
);
1015 void iscsit_set_unsoliticed_dataout(struct iscsi_cmd
*cmd
)
1017 iscsit_set_dataout_sequence_values(cmd
);
1019 spin_lock_bh(&cmd
->dataout_timeout_lock
);
1020 iscsit_start_dataout_timer(cmd
, cmd
->conn
);
1021 spin_unlock_bh(&cmd
->dataout_timeout_lock
);
1023 EXPORT_SYMBOL(iscsit_set_unsoliticed_dataout
);
1025 int iscsit_process_scsi_cmd(struct iscsi_conn
*conn
, struct iscsi_cmd
*cmd
,
1026 struct iscsi_scsi_req
*hdr
)
1030 * Check the CmdSN against ExpCmdSN/MaxCmdSN here if
1031 * the Immediate Bit is not set, and no Immediate
1034 * A PDU/CmdSN carrying Immediate Data can only
1035 * be processed after the DataCRC has passed.
1036 * If the DataCRC fails, the CmdSN MUST NOT
1037 * be acknowledged. (See below)
1039 if (!cmd
->immediate_data
) {
1040 cmdsn_ret
= iscsit_sequence_cmd(conn
, cmd
,
1041 (unsigned char *)hdr
, hdr
->cmdsn
);
1042 if (cmdsn_ret
== CMDSN_ERROR_CANNOT_RECOVER
)
1044 else if (cmdsn_ret
== CMDSN_LOWER_THAN_EXP
) {
1045 target_put_sess_cmd(conn
->sess
->se_sess
, &cmd
->se_cmd
);
1050 iscsit_ack_from_expstatsn(conn
, be32_to_cpu(hdr
->exp_statsn
));
1053 * If no Immediate Data is attached, it's OK to return now.
1055 if (!cmd
->immediate_data
) {
1056 if (!cmd
->sense_reason
&& cmd
->unsolicited_data
)
1057 iscsit_set_unsoliticed_dataout(cmd
);
1058 if (!cmd
->sense_reason
)
1061 target_put_sess_cmd(conn
->sess
->se_sess
, &cmd
->se_cmd
);
1066 * Early CHECK_CONDITIONs with ImmediateData never make it to command
1067 * execution. These exceptions are processed in CmdSN order using
1068 * iscsit_check_received_cmdsn() in iscsit_get_immediate_data() below.
1070 if (cmd
->sense_reason
) {
1071 if (cmd
->reject_reason
)
1077 * Call directly into transport_generic_new_cmd() to perform
1078 * the backend memory allocation.
1080 cmd
->sense_reason
= transport_generic_new_cmd(&cmd
->se_cmd
);
1081 if (cmd
->sense_reason
)
1086 EXPORT_SYMBOL(iscsit_process_scsi_cmd
);
1089 iscsit_get_immediate_data(struct iscsi_cmd
*cmd
, struct iscsi_scsi_req
*hdr
,
1092 struct iscsi_conn
*conn
= cmd
->conn
;
1093 int cmdsn_ret
= 0, immed_ret
= IMMEDIATE_DATA_NORMAL_OPERATION
;
1095 * Special case for Unsupported SAM WRITE Opcodes and ImmediateData=Yes.
1097 if (dump_payload
== true)
1098 goto after_immediate_data
;
1100 immed_ret
= iscsit_handle_immediate_data(cmd
, hdr
,
1101 cmd
->first_burst_len
);
1102 after_immediate_data
:
1103 if (immed_ret
== IMMEDIATE_DATA_NORMAL_OPERATION
) {
1105 * A PDU/CmdSN carrying Immediate Data passed
1106 * DataCRC, check against ExpCmdSN/MaxCmdSN if
1107 * Immediate Bit is not set.
1109 cmdsn_ret
= iscsit_sequence_cmd(cmd
->conn
, cmd
,
1110 (unsigned char *)hdr
, hdr
->cmdsn
);
1111 if (cmdsn_ret
== CMDSN_ERROR_CANNOT_RECOVER
)
1114 if (cmd
->sense_reason
|| cmdsn_ret
== CMDSN_LOWER_THAN_EXP
) {
1117 rc
= iscsit_dump_data_payload(cmd
->conn
,
1118 cmd
->first_burst_len
, 1);
1119 target_put_sess_cmd(conn
->sess
->se_sess
, &cmd
->se_cmd
);
1121 } else if (cmd
->unsolicited_data
)
1122 iscsit_set_unsoliticed_dataout(cmd
);
1124 } else if (immed_ret
== IMMEDIATE_DATA_ERL1_CRC_FAILURE
) {
1126 * Immediate Data failed DataCRC and ERL>=1,
1127 * silently drop this PDU and let the initiator
1128 * plug the CmdSN gap.
1130 * FIXME: Send Unsolicited NOPIN with reserved
1131 * TTT here to help the initiator figure out
1132 * the missing CmdSN, although they should be
1133 * intelligent enough to determine the missing
1134 * CmdSN and issue a retry to plug the sequence.
1136 cmd
->i_state
= ISTATE_REMOVE
;
1137 iscsit_add_cmd_to_immediate_queue(cmd
, cmd
->conn
, cmd
->i_state
);
1138 } else /* immed_ret == IMMEDIATE_DATA_CANNOT_RECOVER */
1145 iscsit_handle_scsi_cmd(struct iscsi_conn
*conn
, struct iscsi_cmd
*cmd
,
1148 struct iscsi_scsi_req
*hdr
= (struct iscsi_scsi_req
*)buf
;
1150 bool dump_payload
= false;
1152 rc
= iscsit_setup_scsi_cmd(conn
, cmd
, buf
);
1156 * Allocation iovecs needed for struct socket operations for
1157 * traditional iSCSI block I/O.
1159 if (iscsit_allocate_iovecs(cmd
) < 0) {
1160 return iscsit_add_reject_cmd(cmd
,
1161 ISCSI_REASON_BOOKMARK_NO_RESOURCES
, buf
);
1163 immed_data
= cmd
->immediate_data
;
1165 rc
= iscsit_process_scsi_cmd(conn
, cmd
, hdr
);
1169 dump_payload
= true;
1174 return iscsit_get_immediate_data(cmd
, hdr
, dump_payload
);
1177 static u32
iscsit_do_crypto_hash_sg(
1178 struct hash_desc
*hash
,
1179 struct iscsi_cmd
*cmd
,
1187 struct scatterlist
*sg
;
1188 unsigned int page_off
;
1190 crypto_hash_init(hash
);
1192 sg
= cmd
->first_data_sg
;
1193 page_off
= cmd
->first_data_sg_off
;
1196 while (data_length
) {
1197 u32 cur_len
= min_t(u32
, data_length
, (sg
[i
].length
- page_off
));
1199 crypto_hash_update(hash
, &sg
[i
], cur_len
);
1201 data_length
-= cur_len
;
1207 struct scatterlist pad_sg
;
1209 sg_init_one(&pad_sg
, pad_bytes
, padding
);
1210 crypto_hash_update(hash
, &pad_sg
, padding
);
1212 crypto_hash_final(hash
, (u8
*) &data_crc
);
1217 static void iscsit_do_crypto_hash_buf(
1218 struct hash_desc
*hash
,
1225 struct scatterlist sg
;
1227 crypto_hash_init(hash
);
1229 sg_init_one(&sg
, buf
, payload_length
);
1230 crypto_hash_update(hash
, &sg
, payload_length
);
1233 sg_init_one(&sg
, pad_bytes
, padding
);
1234 crypto_hash_update(hash
, &sg
, padding
);
1236 crypto_hash_final(hash
, data_crc
);
1240 iscsit_check_dataout_hdr(struct iscsi_conn
*conn
, unsigned char *buf
,
1241 struct iscsi_cmd
**out_cmd
)
1243 struct iscsi_data
*hdr
= (struct iscsi_data
*)buf
;
1244 struct iscsi_cmd
*cmd
= NULL
;
1245 struct se_cmd
*se_cmd
;
1246 u32 payload_length
= ntoh24(hdr
->dlength
);
1249 if (!payload_length
) {
1250 pr_warn("DataOUT payload is ZERO, ignoring.\n");
1255 atomic_long_add(payload_length
, &conn
->sess
->rx_data_octets
);
1257 if (payload_length
> conn
->conn_ops
->MaxXmitDataSegmentLength
) {
1258 pr_err("DataSegmentLength: %u is greater than"
1259 " MaxXmitDataSegmentLength: %u\n", payload_length
,
1260 conn
->conn_ops
->MaxXmitDataSegmentLength
);
1261 return iscsit_add_reject(conn
, ISCSI_REASON_PROTOCOL_ERROR
,
1265 cmd
= iscsit_find_cmd_from_itt_or_dump(conn
, hdr
->itt
,
1270 pr_debug("Got DataOut ITT: 0x%08x, TTT: 0x%08x,"
1271 " DataSN: 0x%08x, Offset: %u, Length: %u, CID: %hu\n",
1272 hdr
->itt
, hdr
->ttt
, hdr
->datasn
, ntohl(hdr
->offset
),
1273 payload_length
, conn
->cid
);
1275 if (cmd
->cmd_flags
& ICF_GOT_LAST_DATAOUT
) {
1276 pr_err("Command ITT: 0x%08x received DataOUT after"
1277 " last DataOUT received, dumping payload\n",
1278 cmd
->init_task_tag
);
1279 return iscsit_dump_data_payload(conn
, payload_length
, 1);
1282 if (cmd
->data_direction
!= DMA_TO_DEVICE
) {
1283 pr_err("Command ITT: 0x%08x received DataOUT for a"
1284 " NON-WRITE command.\n", cmd
->init_task_tag
);
1285 return iscsit_reject_cmd(cmd
, ISCSI_REASON_PROTOCOL_ERROR
, buf
);
1287 se_cmd
= &cmd
->se_cmd
;
1288 iscsit_mod_dataout_timer(cmd
);
1290 if ((be32_to_cpu(hdr
->offset
) + payload_length
) > cmd
->se_cmd
.data_length
) {
1291 pr_err("DataOut Offset: %u, Length %u greater than"
1292 " iSCSI Command EDTL %u, protocol error.\n",
1293 hdr
->offset
, payload_length
, cmd
->se_cmd
.data_length
);
1294 return iscsit_reject_cmd(cmd
, ISCSI_REASON_BOOKMARK_INVALID
, buf
);
1297 if (cmd
->unsolicited_data
) {
1298 int dump_unsolicited_data
= 0;
1300 if (conn
->sess
->sess_ops
->InitialR2T
) {
1301 pr_err("Received unexpected unsolicited data"
1302 " while InitialR2T=Yes, protocol error.\n");
1303 transport_send_check_condition_and_sense(&cmd
->se_cmd
,
1304 TCM_UNEXPECTED_UNSOLICITED_DATA
, 0);
1308 * Special case for dealing with Unsolicited DataOUT
1309 * and Unsupported SAM WRITE Opcodes and SE resource allocation
1313 /* Something's amiss if we're not in WRITE_PENDING state... */
1314 WARN_ON(se_cmd
->t_state
!= TRANSPORT_WRITE_PENDING
);
1315 if (!(se_cmd
->se_cmd_flags
& SCF_SUPPORTED_SAM_OPCODE
))
1316 dump_unsolicited_data
= 1;
1318 if (dump_unsolicited_data
) {
1320 * Check if a delayed TASK_ABORTED status needs to
1321 * be sent now if the ISCSI_FLAG_CMD_FINAL has been
1322 * received with the unsolicitied data out.
1324 if (hdr
->flags
& ISCSI_FLAG_CMD_FINAL
)
1325 iscsit_stop_dataout_timer(cmd
);
1327 transport_check_aborted_status(se_cmd
,
1328 (hdr
->flags
& ISCSI_FLAG_CMD_FINAL
));
1329 return iscsit_dump_data_payload(conn
, payload_length
, 1);
1333 * For the normal solicited data path:
1335 * Check for a delayed TASK_ABORTED status and dump any
1336 * incoming data out payload if one exists. Also, when the
1337 * ISCSI_FLAG_CMD_FINAL is set to denote the end of the current
1338 * data out sequence, we decrement outstanding_r2ts. Once
1339 * outstanding_r2ts reaches zero, go ahead and send the delayed
1340 * TASK_ABORTED status.
1342 if (se_cmd
->transport_state
& CMD_T_ABORTED
) {
1343 if (hdr
->flags
& ISCSI_FLAG_CMD_FINAL
)
1344 if (--cmd
->outstanding_r2ts
< 1) {
1345 iscsit_stop_dataout_timer(cmd
);
1346 transport_check_aborted_status(
1350 return iscsit_dump_data_payload(conn
, payload_length
, 1);
1354 * Preform DataSN, DataSequenceInOrder, DataPDUInOrder, and
1355 * within-command recovery checks before receiving the payload.
1357 rc
= iscsit_check_pre_dataout(cmd
, buf
);
1358 if (rc
== DATAOUT_WITHIN_COMMAND_RECOVERY
)
1360 else if (rc
== DATAOUT_CANNOT_RECOVER
)
1366 EXPORT_SYMBOL(iscsit_check_dataout_hdr
);
1369 iscsit_get_dataout(struct iscsi_conn
*conn
, struct iscsi_cmd
*cmd
,
1370 struct iscsi_data
*hdr
)
1373 u32 checksum
, iov_count
= 0, padding
= 0, rx_got
= 0, rx_size
= 0;
1374 u32 payload_length
= ntoh24(hdr
->dlength
);
1375 int iov_ret
, data_crc_failed
= 0;
1377 rx_size
+= payload_length
;
1378 iov
= &cmd
->iov_data
[0];
1380 iov_ret
= iscsit_map_iovec(cmd
, iov
, be32_to_cpu(hdr
->offset
),
1385 iov_count
+= iov_ret
;
1387 padding
= ((-payload_length
) & 3);
1389 iov
[iov_count
].iov_base
= cmd
->pad_bytes
;
1390 iov
[iov_count
++].iov_len
= padding
;
1392 pr_debug("Receiving %u padding bytes.\n", padding
);
1395 if (conn
->conn_ops
->DataDigest
) {
1396 iov
[iov_count
].iov_base
= &checksum
;
1397 iov
[iov_count
++].iov_len
= ISCSI_CRC_LEN
;
1398 rx_size
+= ISCSI_CRC_LEN
;
1401 rx_got
= rx_data(conn
, &cmd
->iov_data
[0], iov_count
, rx_size
);
1403 iscsit_unmap_iovec(cmd
);
1405 if (rx_got
!= rx_size
)
1408 if (conn
->conn_ops
->DataDigest
) {
1411 data_crc
= iscsit_do_crypto_hash_sg(&conn
->conn_rx_hash
, cmd
,
1412 be32_to_cpu(hdr
->offset
),
1413 payload_length
, padding
,
1416 if (checksum
!= data_crc
) {
1417 pr_err("ITT: 0x%08x, Offset: %u, Length: %u,"
1418 " DataSN: 0x%08x, CRC32C DataDigest 0x%08x"
1419 " does not match computed 0x%08x\n",
1420 hdr
->itt
, hdr
->offset
, payload_length
,
1421 hdr
->datasn
, checksum
, data_crc
);
1422 data_crc_failed
= 1;
1424 pr_debug("Got CRC32C DataDigest 0x%08x for"
1425 " %u bytes of Data Out\n", checksum
,
1430 return data_crc_failed
;
1434 iscsit_check_dataout_payload(struct iscsi_cmd
*cmd
, struct iscsi_data
*hdr
,
1435 bool data_crc_failed
)
1437 struct iscsi_conn
*conn
= cmd
->conn
;
1440 * Increment post receive data and CRC values or perform
1441 * within-command recovery.
1443 rc
= iscsit_check_post_dataout(cmd
, (unsigned char *)hdr
, data_crc_failed
);
1444 if ((rc
== DATAOUT_NORMAL
) || (rc
== DATAOUT_WITHIN_COMMAND_RECOVERY
))
1446 else if (rc
== DATAOUT_SEND_R2T
) {
1447 iscsit_set_dataout_sequence_values(cmd
);
1448 conn
->conn_transport
->iscsit_get_dataout(conn
, cmd
, false);
1449 } else if (rc
== DATAOUT_SEND_TO_TRANSPORT
) {
1451 * Handle extra special case for out of order
1452 * Unsolicited Data Out.
1454 spin_lock_bh(&cmd
->istate_lock
);
1455 ooo_cmdsn
= (cmd
->cmd_flags
& ICF_OOO_CMDSN
);
1456 cmd
->cmd_flags
|= ICF_GOT_LAST_DATAOUT
;
1457 cmd
->i_state
= ISTATE_RECEIVED_LAST_DATAOUT
;
1458 spin_unlock_bh(&cmd
->istate_lock
);
1460 iscsit_stop_dataout_timer(cmd
);
1463 target_execute_cmd(&cmd
->se_cmd
);
1465 } else /* DATAOUT_CANNOT_RECOVER */
1470 EXPORT_SYMBOL(iscsit_check_dataout_payload
);
1472 static int iscsit_handle_data_out(struct iscsi_conn
*conn
, unsigned char *buf
)
1474 struct iscsi_cmd
*cmd
= NULL
;
1475 struct iscsi_data
*hdr
= (struct iscsi_data
*)buf
;
1477 bool data_crc_failed
= false;
1479 rc
= iscsit_check_dataout_hdr(conn
, buf
, &cmd
);
1485 rc
= iscsit_get_dataout(conn
, cmd
, hdr
);
1489 data_crc_failed
= true;
1491 return iscsit_check_dataout_payload(cmd
, hdr
, data_crc_failed
);
1494 int iscsit_setup_nop_out(struct iscsi_conn
*conn
, struct iscsi_cmd
*cmd
,
1495 struct iscsi_nopout
*hdr
)
1497 u32 payload_length
= ntoh24(hdr
->dlength
);
1499 if (hdr
->itt
== RESERVED_ITT
&& !(hdr
->opcode
& ISCSI_OP_IMMEDIATE
)) {
1500 pr_err("NOPOUT ITT is reserved, but Immediate Bit is"
1501 " not set, protocol error.\n");
1503 return iscsit_add_reject(conn
, ISCSI_REASON_PROTOCOL_ERROR
,
1504 (unsigned char *)hdr
);
1506 return iscsit_reject_cmd(cmd
, ISCSI_REASON_PROTOCOL_ERROR
,
1507 (unsigned char *)hdr
);
1510 if (payload_length
> conn
->conn_ops
->MaxXmitDataSegmentLength
) {
1511 pr_err("NOPOUT Ping Data DataSegmentLength: %u is"
1512 " greater than MaxXmitDataSegmentLength: %u, protocol"
1513 " error.\n", payload_length
,
1514 conn
->conn_ops
->MaxXmitDataSegmentLength
);
1516 return iscsit_add_reject(conn
, ISCSI_REASON_PROTOCOL_ERROR
,
1517 (unsigned char *)hdr
);
1519 return iscsit_reject_cmd(cmd
, ISCSI_REASON_PROTOCOL_ERROR
,
1520 (unsigned char *)hdr
);
1523 pr_debug("Got NOPOUT Ping %s ITT: 0x%08x, TTT: 0x%08x,"
1524 " CmdSN: 0x%08x, ExpStatSN: 0x%08x, Length: %u\n",
1525 hdr
->itt
== RESERVED_ITT
? "Response" : "Request",
1526 hdr
->itt
, hdr
->ttt
, hdr
->cmdsn
, hdr
->exp_statsn
,
1529 * This is not a response to a Unsolicited NopIN, which means
1530 * it can either be a NOPOUT ping request (with a valid ITT),
1531 * or a NOPOUT not requesting a NOPIN (with a reserved ITT).
1532 * Either way, make sure we allocate an struct iscsi_cmd, as both
1533 * can contain ping data.
1535 if (hdr
->ttt
== cpu_to_be32(0xFFFFFFFF)) {
1536 cmd
->iscsi_opcode
= ISCSI_OP_NOOP_OUT
;
1537 cmd
->i_state
= ISTATE_SEND_NOPIN
;
1538 cmd
->immediate_cmd
= ((hdr
->opcode
& ISCSI_OP_IMMEDIATE
) ?
1540 conn
->sess
->init_task_tag
= cmd
->init_task_tag
= hdr
->itt
;
1541 cmd
->targ_xfer_tag
= 0xFFFFFFFF;
1542 cmd
->cmd_sn
= be32_to_cpu(hdr
->cmdsn
);
1543 cmd
->exp_stat_sn
= be32_to_cpu(hdr
->exp_statsn
);
1544 cmd
->data_direction
= DMA_NONE
;
1549 EXPORT_SYMBOL(iscsit_setup_nop_out
);
1551 int iscsit_process_nop_out(struct iscsi_conn
*conn
, struct iscsi_cmd
*cmd
,
1552 struct iscsi_nopout
*hdr
)
1554 struct iscsi_cmd
*cmd_p
= NULL
;
1557 * Initiator is expecting a NopIN ping reply..
1559 if (hdr
->itt
!= RESERVED_ITT
) {
1562 spin_lock_bh(&conn
->cmd_lock
);
1563 list_add_tail(&cmd
->i_conn_node
, &conn
->conn_cmd_list
);
1564 spin_unlock_bh(&conn
->cmd_lock
);
1566 iscsit_ack_from_expstatsn(conn
, be32_to_cpu(hdr
->exp_statsn
));
1568 if (hdr
->opcode
& ISCSI_OP_IMMEDIATE
) {
1569 iscsit_add_cmd_to_response_queue(cmd
, conn
,
1574 cmdsn_ret
= iscsit_sequence_cmd(conn
, cmd
,
1575 (unsigned char *)hdr
, hdr
->cmdsn
);
1576 if (cmdsn_ret
== CMDSN_LOWER_THAN_EXP
)
1578 if (cmdsn_ret
== CMDSN_ERROR_CANNOT_RECOVER
)
1584 * This was a response to a unsolicited NOPIN ping.
1586 if (hdr
->ttt
!= cpu_to_be32(0xFFFFFFFF)) {
1587 cmd_p
= iscsit_find_cmd_from_ttt(conn
, be32_to_cpu(hdr
->ttt
));
1591 iscsit_stop_nopin_response_timer(conn
);
1593 cmd_p
->i_state
= ISTATE_REMOVE
;
1594 iscsit_add_cmd_to_immediate_queue(cmd_p
, conn
, cmd_p
->i_state
);
1596 iscsit_start_nopin_timer(conn
);
1600 * Otherwise, initiator is not expecting a NOPIN is response.
1601 * Just ignore for now.
1605 EXPORT_SYMBOL(iscsit_process_nop_out
);
1607 static int iscsit_handle_nop_out(struct iscsi_conn
*conn
, struct iscsi_cmd
*cmd
,
1610 unsigned char *ping_data
= NULL
;
1611 struct iscsi_nopout
*hdr
= (struct iscsi_nopout
*)buf
;
1612 struct kvec
*iov
= NULL
;
1613 u32 payload_length
= ntoh24(hdr
->dlength
);
1616 ret
= iscsit_setup_nop_out(conn
, cmd
, hdr
);
1620 * Handle NOP-OUT payload for traditional iSCSI sockets
1622 if (payload_length
&& hdr
->ttt
== cpu_to_be32(0xFFFFFFFF)) {
1623 u32 checksum
, data_crc
, padding
= 0;
1624 int niov
= 0, rx_got
, rx_size
= payload_length
;
1626 ping_data
= kzalloc(payload_length
+ 1, GFP_KERNEL
);
1628 pr_err("Unable to allocate memory for"
1629 " NOPOUT ping data.\n");
1634 iov
= &cmd
->iov_misc
[0];
1635 iov
[niov
].iov_base
= ping_data
;
1636 iov
[niov
++].iov_len
= payload_length
;
1638 padding
= ((-payload_length
) & 3);
1640 pr_debug("Receiving %u additional bytes"
1641 " for padding.\n", padding
);
1642 iov
[niov
].iov_base
= &cmd
->pad_bytes
;
1643 iov
[niov
++].iov_len
= padding
;
1646 if (conn
->conn_ops
->DataDigest
) {
1647 iov
[niov
].iov_base
= &checksum
;
1648 iov
[niov
++].iov_len
= ISCSI_CRC_LEN
;
1649 rx_size
+= ISCSI_CRC_LEN
;
1652 rx_got
= rx_data(conn
, &cmd
->iov_misc
[0], niov
, rx_size
);
1653 if (rx_got
!= rx_size
) {
1658 if (conn
->conn_ops
->DataDigest
) {
1659 iscsit_do_crypto_hash_buf(&conn
->conn_rx_hash
,
1660 ping_data
, payload_length
,
1661 padding
, cmd
->pad_bytes
,
1664 if (checksum
!= data_crc
) {
1665 pr_err("Ping data CRC32C DataDigest"
1666 " 0x%08x does not match computed 0x%08x\n",
1667 checksum
, data_crc
);
1668 if (!conn
->sess
->sess_ops
->ErrorRecoveryLevel
) {
1669 pr_err("Unable to recover from"
1670 " NOPOUT Ping DataCRC failure while in"
1676 * Silently drop this PDU and let the
1677 * initiator plug the CmdSN gap.
1679 pr_debug("Dropping NOPOUT"
1680 " Command CmdSN: 0x%08x due to"
1681 " DataCRC error.\n", hdr
->cmdsn
);
1686 pr_debug("Got CRC32C DataDigest"
1687 " 0x%08x for %u bytes of ping data.\n",
1688 checksum
, payload_length
);
1692 ping_data
[payload_length
] = '\0';
1694 * Attach ping data to struct iscsi_cmd->buf_ptr.
1696 cmd
->buf_ptr
= ping_data
;
1697 cmd
->buf_ptr_size
= payload_length
;
1699 pr_debug("Got %u bytes of NOPOUT ping"
1700 " data.\n", payload_length
);
1701 pr_debug("Ping Data: \"%s\"\n", ping_data
);
1704 return iscsit_process_nop_out(conn
, cmd
, hdr
);
1707 iscsit_free_cmd(cmd
, false);
1714 iscsit_handle_task_mgt_cmd(struct iscsi_conn
*conn
, struct iscsi_cmd
*cmd
,
1717 struct se_tmr_req
*se_tmr
;
1718 struct iscsi_tmr_req
*tmr_req
;
1719 struct iscsi_tm
*hdr
;
1720 int out_of_order_cmdsn
= 0, ret
;
1721 bool sess_ref
= false;
1724 hdr
= (struct iscsi_tm
*) buf
;
1725 hdr
->flags
&= ~ISCSI_FLAG_CMD_FINAL
;
1726 function
= hdr
->flags
;
1728 pr_debug("Got Task Management Request ITT: 0x%08x, CmdSN:"
1729 " 0x%08x, Function: 0x%02x, RefTaskTag: 0x%08x, RefCmdSN:"
1730 " 0x%08x, CID: %hu\n", hdr
->itt
, hdr
->cmdsn
, function
,
1731 hdr
->rtt
, hdr
->refcmdsn
, conn
->cid
);
1733 if ((function
!= ISCSI_TM_FUNC_ABORT_TASK
) &&
1734 ((function
!= ISCSI_TM_FUNC_TASK_REASSIGN
) &&
1735 hdr
->rtt
!= RESERVED_ITT
)) {
1736 pr_err("RefTaskTag should be set to 0xFFFFFFFF.\n");
1737 hdr
->rtt
= RESERVED_ITT
;
1740 if ((function
== ISCSI_TM_FUNC_TASK_REASSIGN
) &&
1741 !(hdr
->opcode
& ISCSI_OP_IMMEDIATE
)) {
1742 pr_err("Task Management Request TASK_REASSIGN not"
1743 " issued as immediate command, bad iSCSI Initiator"
1744 "implementation\n");
1745 return iscsit_add_reject_cmd(cmd
,
1746 ISCSI_REASON_PROTOCOL_ERROR
, buf
);
1748 if ((function
!= ISCSI_TM_FUNC_ABORT_TASK
) &&
1749 be32_to_cpu(hdr
->refcmdsn
) != ISCSI_RESERVED_TAG
)
1750 hdr
->refcmdsn
= cpu_to_be32(ISCSI_RESERVED_TAG
);
1752 cmd
->data_direction
= DMA_NONE
;
1754 cmd
->tmr_req
= kzalloc(sizeof(struct iscsi_tmr_req
), GFP_KERNEL
);
1755 if (!cmd
->tmr_req
) {
1756 pr_err("Unable to allocate memory for"
1757 " Task Management command!\n");
1758 return iscsit_add_reject_cmd(cmd
,
1759 ISCSI_REASON_BOOKMARK_NO_RESOURCES
,
1764 * TASK_REASSIGN for ERL=2 / connection stays inside of
1765 * LIO-Target $FABRIC_MOD
1767 if (function
!= ISCSI_TM_FUNC_TASK_REASSIGN
) {
1772 transport_init_se_cmd(&cmd
->se_cmd
,
1773 &lio_target_fabric_configfs
->tf_ops
,
1774 conn
->sess
->se_sess
, 0, DMA_NONE
,
1775 MSG_SIMPLE_TAG
, cmd
->sense_buffer
+ 2);
1777 target_get_sess_cmd(conn
->sess
->se_sess
, &cmd
->se_cmd
, true);
1781 case ISCSI_TM_FUNC_ABORT_TASK
:
1782 tcm_function
= TMR_ABORT_TASK
;
1784 case ISCSI_TM_FUNC_ABORT_TASK_SET
:
1785 tcm_function
= TMR_ABORT_TASK_SET
;
1787 case ISCSI_TM_FUNC_CLEAR_ACA
:
1788 tcm_function
= TMR_CLEAR_ACA
;
1790 case ISCSI_TM_FUNC_CLEAR_TASK_SET
:
1791 tcm_function
= TMR_CLEAR_TASK_SET
;
1793 case ISCSI_TM_FUNC_LOGICAL_UNIT_RESET
:
1794 tcm_function
= TMR_LUN_RESET
;
1796 case ISCSI_TM_FUNC_TARGET_WARM_RESET
:
1797 tcm_function
= TMR_TARGET_WARM_RESET
;
1799 case ISCSI_TM_FUNC_TARGET_COLD_RESET
:
1800 tcm_function
= TMR_TARGET_COLD_RESET
;
1803 pr_err("Unknown iSCSI TMR Function:"
1804 " 0x%02x\n", function
);
1805 return iscsit_add_reject_cmd(cmd
,
1806 ISCSI_REASON_BOOKMARK_NO_RESOURCES
, buf
);
1809 ret
= core_tmr_alloc_req(&cmd
->se_cmd
, cmd
->tmr_req
,
1810 tcm_function
, GFP_KERNEL
);
1812 return iscsit_add_reject_cmd(cmd
,
1813 ISCSI_REASON_BOOKMARK_NO_RESOURCES
, buf
);
1815 cmd
->tmr_req
->se_tmr_req
= cmd
->se_cmd
.se_tmr_req
;
1818 cmd
->iscsi_opcode
= ISCSI_OP_SCSI_TMFUNC
;
1819 cmd
->i_state
= ISTATE_SEND_TASKMGTRSP
;
1820 cmd
->immediate_cmd
= ((hdr
->opcode
& ISCSI_OP_IMMEDIATE
) ? 1 : 0);
1821 cmd
->init_task_tag
= hdr
->itt
;
1822 cmd
->targ_xfer_tag
= 0xFFFFFFFF;
1823 cmd
->cmd_sn
= be32_to_cpu(hdr
->cmdsn
);
1824 cmd
->exp_stat_sn
= be32_to_cpu(hdr
->exp_statsn
);
1825 se_tmr
= cmd
->se_cmd
.se_tmr_req
;
1826 tmr_req
= cmd
->tmr_req
;
1828 * Locate the struct se_lun for all TMRs not related to ERL=2 TASK_REASSIGN
1830 if (function
!= ISCSI_TM_FUNC_TASK_REASSIGN
) {
1831 ret
= transport_lookup_tmr_lun(&cmd
->se_cmd
,
1832 scsilun_to_int(&hdr
->lun
));
1834 se_tmr
->response
= ISCSI_TMF_RSP_NO_LUN
;
1840 case ISCSI_TM_FUNC_ABORT_TASK
:
1841 se_tmr
->response
= iscsit_tmr_abort_task(cmd
, buf
);
1842 if (se_tmr
->response
)
1845 case ISCSI_TM_FUNC_ABORT_TASK_SET
:
1846 case ISCSI_TM_FUNC_CLEAR_ACA
:
1847 case ISCSI_TM_FUNC_CLEAR_TASK_SET
:
1848 case ISCSI_TM_FUNC_LOGICAL_UNIT_RESET
:
1850 case ISCSI_TM_FUNC_TARGET_WARM_RESET
:
1851 if (iscsit_tmr_task_warm_reset(conn
, tmr_req
, buf
) < 0) {
1852 se_tmr
->response
= ISCSI_TMF_RSP_AUTH_FAILED
;
1856 case ISCSI_TM_FUNC_TARGET_COLD_RESET
:
1857 if (iscsit_tmr_task_cold_reset(conn
, tmr_req
, buf
) < 0) {
1858 se_tmr
->response
= ISCSI_TMF_RSP_AUTH_FAILED
;
1862 case ISCSI_TM_FUNC_TASK_REASSIGN
:
1863 se_tmr
->response
= iscsit_tmr_task_reassign(cmd
, buf
);
1865 * Perform sanity checks on the ExpDataSN only if the
1866 * TASK_REASSIGN was successful.
1868 if (se_tmr
->response
)
1871 if (iscsit_check_task_reassign_expdatasn(tmr_req
, conn
) < 0)
1872 return iscsit_add_reject_cmd(cmd
,
1873 ISCSI_REASON_BOOKMARK_INVALID
, buf
);
1876 pr_err("Unknown TMR function: 0x%02x, protocol"
1877 " error.\n", function
);
1878 se_tmr
->response
= ISCSI_TMF_RSP_NOT_SUPPORTED
;
1882 if ((function
!= ISCSI_TM_FUNC_TASK_REASSIGN
) &&
1883 (se_tmr
->response
== ISCSI_TMF_RSP_COMPLETE
))
1884 se_tmr
->call_transport
= 1;
1886 spin_lock_bh(&conn
->cmd_lock
);
1887 list_add_tail(&cmd
->i_conn_node
, &conn
->conn_cmd_list
);
1888 spin_unlock_bh(&conn
->cmd_lock
);
1890 if (!(hdr
->opcode
& ISCSI_OP_IMMEDIATE
)) {
1891 int cmdsn_ret
= iscsit_sequence_cmd(conn
, cmd
, buf
, hdr
->cmdsn
);
1892 if (cmdsn_ret
== CMDSN_HIGHER_THAN_EXP
)
1893 out_of_order_cmdsn
= 1;
1894 else if (cmdsn_ret
== CMDSN_LOWER_THAN_EXP
)
1896 else if (cmdsn_ret
== CMDSN_ERROR_CANNOT_RECOVER
)
1899 iscsit_ack_from_expstatsn(conn
, be32_to_cpu(hdr
->exp_statsn
));
1901 if (out_of_order_cmdsn
|| !(hdr
->opcode
& ISCSI_OP_IMMEDIATE
))
1904 * Found the referenced task, send to transport for processing.
1906 if (se_tmr
->call_transport
)
1907 return transport_generic_handle_tmr(&cmd
->se_cmd
);
1910 * Could not find the referenced LUN, task, or Task Management
1911 * command not authorized or supported. Change state and
1912 * let the tx_thread send the response.
1914 * For connection recovery, this is also the default action for
1915 * TMR TASK_REASSIGN.
1918 pr_debug("Handle TMR, using sess_ref=true check\n");
1919 target_put_sess_cmd(conn
->sess
->se_sess
, &cmd
->se_cmd
);
1922 iscsit_add_cmd_to_response_queue(cmd
, conn
, cmd
->i_state
);
1925 EXPORT_SYMBOL(iscsit_handle_task_mgt_cmd
);
1927 /* #warning FIXME: Support Text Command parameters besides SendTargets */
1929 iscsit_setup_text_cmd(struct iscsi_conn
*conn
, struct iscsi_cmd
*cmd
,
1930 struct iscsi_text
*hdr
)
1932 u32 payload_length
= ntoh24(hdr
->dlength
);
1934 if (payload_length
> conn
->conn_ops
->MaxXmitDataSegmentLength
) {
1935 pr_err("Unable to accept text parameter length: %u"
1936 "greater than MaxXmitDataSegmentLength %u.\n",
1937 payload_length
, conn
->conn_ops
->MaxXmitDataSegmentLength
);
1938 return iscsit_reject_cmd(cmd
, ISCSI_REASON_PROTOCOL_ERROR
,
1939 (unsigned char *)hdr
);
1942 if (!(hdr
->flags
& ISCSI_FLAG_CMD_FINAL
) ||
1943 (hdr
->flags
& ISCSI_FLAG_TEXT_CONTINUE
)) {
1944 pr_err("Multi sequence text commands currently not supported\n");
1945 return iscsit_reject_cmd(cmd
, ISCSI_REASON_CMD_NOT_SUPPORTED
,
1946 (unsigned char *)hdr
);
1949 pr_debug("Got Text Request: ITT: 0x%08x, CmdSN: 0x%08x,"
1950 " ExpStatSN: 0x%08x, Length: %u\n", hdr
->itt
, hdr
->cmdsn
,
1951 hdr
->exp_statsn
, payload_length
);
1953 cmd
->iscsi_opcode
= ISCSI_OP_TEXT
;
1954 cmd
->i_state
= ISTATE_SEND_TEXTRSP
;
1955 cmd
->immediate_cmd
= ((hdr
->opcode
& ISCSI_OP_IMMEDIATE
) ? 1 : 0);
1956 conn
->sess
->init_task_tag
= cmd
->init_task_tag
= hdr
->itt
;
1957 cmd
->targ_xfer_tag
= 0xFFFFFFFF;
1958 cmd
->cmd_sn
= be32_to_cpu(hdr
->cmdsn
);
1959 cmd
->exp_stat_sn
= be32_to_cpu(hdr
->exp_statsn
);
1960 cmd
->data_direction
= DMA_NONE
;
1964 EXPORT_SYMBOL(iscsit_setup_text_cmd
);
1967 iscsit_process_text_cmd(struct iscsi_conn
*conn
, struct iscsi_cmd
*cmd
,
1968 struct iscsi_text
*hdr
)
1970 unsigned char *text_in
= cmd
->text_in_ptr
, *text_ptr
;
1974 pr_err("Unable to locate text_in buffer for sendtargets"
1978 if (strncmp("SendTargets", text_in
, 11) != 0) {
1979 pr_err("Received Text Data that is not"
1980 " SendTargets, cannot continue.\n");
1983 text_ptr
= strchr(text_in
, '=');
1985 pr_err("No \"=\" separator found in Text Data,"
1986 " cannot continue.\n");
1989 if (!strncmp("=All", text_ptr
, 4)) {
1990 cmd
->cmd_flags
|= IFC_SENDTARGETS_ALL
;
1991 } else if (!strncmp("=iqn.", text_ptr
, 5) ||
1992 !strncmp("=eui.", text_ptr
, 5)) {
1993 cmd
->cmd_flags
|= IFC_SENDTARGETS_SINGLE
;
1995 pr_err("Unable to locate valid SendTargets=%s value\n", text_ptr
);
1999 spin_lock_bh(&conn
->cmd_lock
);
2000 list_add_tail(&cmd
->i_conn_node
, &conn
->conn_cmd_list
);
2001 spin_unlock_bh(&conn
->cmd_lock
);
2003 iscsit_ack_from_expstatsn(conn
, be32_to_cpu(hdr
->exp_statsn
));
2005 if (!(hdr
->opcode
& ISCSI_OP_IMMEDIATE
)) {
2006 cmdsn_ret
= iscsit_sequence_cmd(conn
, cmd
,
2007 (unsigned char *)hdr
, hdr
->cmdsn
);
2008 if (cmdsn_ret
== CMDSN_ERROR_CANNOT_RECOVER
)
2014 return iscsit_execute_cmd(cmd
, 0);
2017 return iscsit_reject_cmd(cmd
, ISCSI_REASON_PROTOCOL_ERROR
,
2018 (unsigned char *)hdr
);
2020 EXPORT_SYMBOL(iscsit_process_text_cmd
);
2023 iscsit_handle_text_cmd(struct iscsi_conn
*conn
, struct iscsi_cmd
*cmd
,
2026 struct iscsi_text
*hdr
= (struct iscsi_text
*)buf
;
2027 char *text_in
= NULL
;
2028 u32 payload_length
= ntoh24(hdr
->dlength
);
2031 rc
= iscsit_setup_text_cmd(conn
, cmd
, hdr
);
2035 rx_size
= payload_length
;
2036 if (payload_length
) {
2037 u32 checksum
= 0, data_crc
= 0;
2038 u32 padding
= 0, pad_bytes
= 0;
2039 int niov
= 0, rx_got
;
2042 text_in
= kzalloc(payload_length
, GFP_KERNEL
);
2044 pr_err("Unable to allocate memory for"
2045 " incoming text parameters\n");
2048 cmd
->text_in_ptr
= text_in
;
2050 memset(iov
, 0, 3 * sizeof(struct kvec
));
2051 iov
[niov
].iov_base
= text_in
;
2052 iov
[niov
++].iov_len
= payload_length
;
2054 padding
= ((-payload_length
) & 3);
2056 iov
[niov
].iov_base
= &pad_bytes
;
2057 iov
[niov
++].iov_len
= padding
;
2059 pr_debug("Receiving %u additional bytes"
2060 " for padding.\n", padding
);
2062 if (conn
->conn_ops
->DataDigest
) {
2063 iov
[niov
].iov_base
= &checksum
;
2064 iov
[niov
++].iov_len
= ISCSI_CRC_LEN
;
2065 rx_size
+= ISCSI_CRC_LEN
;
2068 rx_got
= rx_data(conn
, &iov
[0], niov
, rx_size
);
2069 if (rx_got
!= rx_size
)
2072 if (conn
->conn_ops
->DataDigest
) {
2073 iscsit_do_crypto_hash_buf(&conn
->conn_rx_hash
,
2074 text_in
, payload_length
,
2075 padding
, (u8
*)&pad_bytes
,
2078 if (checksum
!= data_crc
) {
2079 pr_err("Text data CRC32C DataDigest"
2080 " 0x%08x does not match computed"
2081 " 0x%08x\n", checksum
, data_crc
);
2082 if (!conn
->sess
->sess_ops
->ErrorRecoveryLevel
) {
2083 pr_err("Unable to recover from"
2084 " Text Data digest failure while in"
2089 * Silently drop this PDU and let the
2090 * initiator plug the CmdSN gap.
2092 pr_debug("Dropping Text"
2093 " Command CmdSN: 0x%08x due to"
2094 " DataCRC error.\n", hdr
->cmdsn
);
2099 pr_debug("Got CRC32C DataDigest"
2100 " 0x%08x for %u bytes of text data.\n",
2101 checksum
, payload_length
);
2104 text_in
[payload_length
- 1] = '\0';
2105 pr_debug("Successfully read %d bytes of text"
2106 " data.\n", payload_length
);
2109 return iscsit_process_text_cmd(conn
, cmd
, hdr
);
2112 kfree(cmd
->text_in_ptr
);
2113 cmd
->text_in_ptr
= NULL
;
2114 return iscsit_reject_cmd(cmd
, ISCSI_REASON_PROTOCOL_ERROR
, buf
);
2116 EXPORT_SYMBOL(iscsit_handle_text_cmd
);
2118 int iscsit_logout_closesession(struct iscsi_cmd
*cmd
, struct iscsi_conn
*conn
)
2120 struct iscsi_conn
*conn_p
;
2121 struct iscsi_session
*sess
= conn
->sess
;
2123 pr_debug("Received logout request CLOSESESSION on CID: %hu"
2124 " for SID: %u.\n", conn
->cid
, conn
->sess
->sid
);
2126 atomic_set(&sess
->session_logout
, 1);
2127 atomic_set(&conn
->conn_logout_remove
, 1);
2128 conn
->conn_logout_reason
= ISCSI_LOGOUT_REASON_CLOSE_SESSION
;
2130 iscsit_inc_conn_usage_count(conn
);
2131 iscsit_inc_session_usage_count(sess
);
2133 spin_lock_bh(&sess
->conn_lock
);
2134 list_for_each_entry(conn_p
, &sess
->sess_conn_list
, conn_list
) {
2135 if (conn_p
->conn_state
!= TARG_CONN_STATE_LOGGED_IN
)
2138 pr_debug("Moving to TARG_CONN_STATE_IN_LOGOUT.\n");
2139 conn_p
->conn_state
= TARG_CONN_STATE_IN_LOGOUT
;
2141 spin_unlock_bh(&sess
->conn_lock
);
2143 iscsit_add_cmd_to_response_queue(cmd
, conn
, cmd
->i_state
);
2148 int iscsit_logout_closeconnection(struct iscsi_cmd
*cmd
, struct iscsi_conn
*conn
)
2150 struct iscsi_conn
*l_conn
;
2151 struct iscsi_session
*sess
= conn
->sess
;
2153 pr_debug("Received logout request CLOSECONNECTION for CID:"
2154 " %hu on CID: %hu.\n", cmd
->logout_cid
, conn
->cid
);
2157 * A Logout Request with a CLOSECONNECTION reason code for a CID
2158 * can arrive on a connection with a differing CID.
2160 if (conn
->cid
== cmd
->logout_cid
) {
2161 spin_lock_bh(&conn
->state_lock
);
2162 pr_debug("Moving to TARG_CONN_STATE_IN_LOGOUT.\n");
2163 conn
->conn_state
= TARG_CONN_STATE_IN_LOGOUT
;
2165 atomic_set(&conn
->conn_logout_remove
, 1);
2166 conn
->conn_logout_reason
= ISCSI_LOGOUT_REASON_CLOSE_CONNECTION
;
2167 iscsit_inc_conn_usage_count(conn
);
2169 spin_unlock_bh(&conn
->state_lock
);
2172 * Handle all different cid CLOSECONNECTION requests in
2173 * iscsit_logout_post_handler_diffcid() as to give enough
2174 * time for any non immediate command's CmdSN to be
2175 * acknowledged on the connection in question.
2177 * Here we simply make sure the CID is still around.
2179 l_conn
= iscsit_get_conn_from_cid(sess
,
2182 cmd
->logout_response
= ISCSI_LOGOUT_CID_NOT_FOUND
;
2183 iscsit_add_cmd_to_response_queue(cmd
, conn
,
2188 iscsit_dec_conn_usage_count(l_conn
);
2191 iscsit_add_cmd_to_response_queue(cmd
, conn
, cmd
->i_state
);
2196 int iscsit_logout_removeconnforrecovery(struct iscsi_cmd
*cmd
, struct iscsi_conn
*conn
)
2198 struct iscsi_session
*sess
= conn
->sess
;
2200 pr_debug("Received explicit REMOVECONNFORRECOVERY logout for"
2201 " CID: %hu on CID: %hu.\n", cmd
->logout_cid
, conn
->cid
);
2203 if (sess
->sess_ops
->ErrorRecoveryLevel
!= 2) {
2204 pr_err("Received Logout Request REMOVECONNFORRECOVERY"
2205 " while ERL!=2.\n");
2206 cmd
->logout_response
= ISCSI_LOGOUT_RECOVERY_UNSUPPORTED
;
2207 iscsit_add_cmd_to_response_queue(cmd
, conn
, cmd
->i_state
);
2211 if (conn
->cid
== cmd
->logout_cid
) {
2212 pr_err("Received Logout Request REMOVECONNFORRECOVERY"
2213 " with CID: %hu on CID: %hu, implementation error.\n",
2214 cmd
->logout_cid
, conn
->cid
);
2215 cmd
->logout_response
= ISCSI_LOGOUT_CLEANUP_FAILED
;
2216 iscsit_add_cmd_to_response_queue(cmd
, conn
, cmd
->i_state
);
2220 iscsit_add_cmd_to_response_queue(cmd
, conn
, cmd
->i_state
);
2226 iscsit_handle_logout_cmd(struct iscsi_conn
*conn
, struct iscsi_cmd
*cmd
,
2229 int cmdsn_ret
, logout_remove
= 0;
2231 struct iscsi_logout
*hdr
;
2232 struct iscsi_tiqn
*tiqn
= iscsit_snmp_get_tiqn(conn
);
2234 hdr
= (struct iscsi_logout
*) buf
;
2235 reason_code
= (hdr
->flags
& 0x7f);
2238 spin_lock(&tiqn
->logout_stats
.lock
);
2239 if (reason_code
== ISCSI_LOGOUT_REASON_CLOSE_SESSION
)
2240 tiqn
->logout_stats
.normal_logouts
++;
2242 tiqn
->logout_stats
.abnormal_logouts
++;
2243 spin_unlock(&tiqn
->logout_stats
.lock
);
2246 pr_debug("Got Logout Request ITT: 0x%08x CmdSN: 0x%08x"
2247 " ExpStatSN: 0x%08x Reason: 0x%02x CID: %hu on CID: %hu\n",
2248 hdr
->itt
, hdr
->cmdsn
, hdr
->exp_statsn
, reason_code
,
2249 hdr
->cid
, conn
->cid
);
2251 if (conn
->conn_state
!= TARG_CONN_STATE_LOGGED_IN
) {
2252 pr_err("Received logout request on connection that"
2253 " is not in logged in state, ignoring request.\n");
2254 iscsit_free_cmd(cmd
, false);
2258 cmd
->iscsi_opcode
= ISCSI_OP_LOGOUT
;
2259 cmd
->i_state
= ISTATE_SEND_LOGOUTRSP
;
2260 cmd
->immediate_cmd
= ((hdr
->opcode
& ISCSI_OP_IMMEDIATE
) ? 1 : 0);
2261 conn
->sess
->init_task_tag
= cmd
->init_task_tag
= hdr
->itt
;
2262 cmd
->targ_xfer_tag
= 0xFFFFFFFF;
2263 cmd
->cmd_sn
= be32_to_cpu(hdr
->cmdsn
);
2264 cmd
->exp_stat_sn
= be32_to_cpu(hdr
->exp_statsn
);
2265 cmd
->logout_cid
= be16_to_cpu(hdr
->cid
);
2266 cmd
->logout_reason
= reason_code
;
2267 cmd
->data_direction
= DMA_NONE
;
2270 * We need to sleep in these cases (by returning 1) until the Logout
2271 * Response gets sent in the tx thread.
2273 if ((reason_code
== ISCSI_LOGOUT_REASON_CLOSE_SESSION
) ||
2274 ((reason_code
== ISCSI_LOGOUT_REASON_CLOSE_CONNECTION
) &&
2275 be16_to_cpu(hdr
->cid
) == conn
->cid
))
2278 spin_lock_bh(&conn
->cmd_lock
);
2279 list_add_tail(&cmd
->i_conn_node
, &conn
->conn_cmd_list
);
2280 spin_unlock_bh(&conn
->cmd_lock
);
2282 if (reason_code
!= ISCSI_LOGOUT_REASON_RECOVERY
)
2283 iscsit_ack_from_expstatsn(conn
, be32_to_cpu(hdr
->exp_statsn
));
2286 * Immediate commands are executed, well, immediately.
2287 * Non-Immediate Logout Commands are executed in CmdSN order.
2289 if (cmd
->immediate_cmd
) {
2290 int ret
= iscsit_execute_cmd(cmd
, 0);
2295 cmdsn_ret
= iscsit_sequence_cmd(conn
, cmd
, buf
, hdr
->cmdsn
);
2296 if (cmdsn_ret
== CMDSN_LOWER_THAN_EXP
)
2298 else if (cmdsn_ret
== CMDSN_ERROR_CANNOT_RECOVER
)
2302 return logout_remove
;
2304 EXPORT_SYMBOL(iscsit_handle_logout_cmd
);
2306 static int iscsit_handle_snack(
2307 struct iscsi_conn
*conn
,
2310 struct iscsi_snack
*hdr
;
2312 hdr
= (struct iscsi_snack
*) buf
;
2313 hdr
->flags
&= ~ISCSI_FLAG_CMD_FINAL
;
2315 pr_debug("Got ISCSI_INIT_SNACK, ITT: 0x%08x, ExpStatSN:"
2316 " 0x%08x, Type: 0x%02x, BegRun: 0x%08x, RunLength: 0x%08x,"
2317 " CID: %hu\n", hdr
->itt
, hdr
->exp_statsn
, hdr
->flags
,
2318 hdr
->begrun
, hdr
->runlength
, conn
->cid
);
2320 if (!conn
->sess
->sess_ops
->ErrorRecoveryLevel
) {
2321 pr_err("Initiator sent SNACK request while in"
2322 " ErrorRecoveryLevel=0.\n");
2323 return iscsit_add_reject(conn
, ISCSI_REASON_PROTOCOL_ERROR
,
2327 * SNACK_DATA and SNACK_R2T are both 0, so check which function to
2328 * call from inside iscsi_send_recovery_datain_or_r2t().
2330 switch (hdr
->flags
& ISCSI_FLAG_SNACK_TYPE_MASK
) {
2332 return iscsit_handle_recovery_datain_or_r2t(conn
, buf
,
2334 be32_to_cpu(hdr
->ttt
),
2335 be32_to_cpu(hdr
->begrun
),
2336 be32_to_cpu(hdr
->runlength
));
2337 case ISCSI_FLAG_SNACK_TYPE_STATUS
:
2338 return iscsit_handle_status_snack(conn
, hdr
->itt
,
2339 be32_to_cpu(hdr
->ttt
),
2340 be32_to_cpu(hdr
->begrun
), be32_to_cpu(hdr
->runlength
));
2341 case ISCSI_FLAG_SNACK_TYPE_DATA_ACK
:
2342 return iscsit_handle_data_ack(conn
, be32_to_cpu(hdr
->ttt
),
2343 be32_to_cpu(hdr
->begrun
),
2344 be32_to_cpu(hdr
->runlength
));
2345 case ISCSI_FLAG_SNACK_TYPE_RDATA
:
2346 /* FIXME: Support R-Data SNACK */
2347 pr_err("R-Data SNACK Not Supported.\n");
2348 return iscsit_add_reject(conn
, ISCSI_REASON_PROTOCOL_ERROR
,
2351 pr_err("Unknown SNACK type 0x%02x, protocol"
2352 " error.\n", hdr
->flags
& 0x0f);
2353 return iscsit_add_reject(conn
, ISCSI_REASON_PROTOCOL_ERROR
,
2360 static void iscsit_rx_thread_wait_for_tcp(struct iscsi_conn
*conn
)
2362 if ((conn
->sock
->sk
->sk_shutdown
& SEND_SHUTDOWN
) ||
2363 (conn
->sock
->sk
->sk_shutdown
& RCV_SHUTDOWN
)) {
2364 wait_for_completion_interruptible_timeout(
2365 &conn
->rx_half_close_comp
,
2366 ISCSI_RX_THREAD_TCP_TIMEOUT
* HZ
);
2370 static int iscsit_handle_immediate_data(
2371 struct iscsi_cmd
*cmd
,
2372 struct iscsi_scsi_req
*hdr
,
2375 int iov_ret
, rx_got
= 0, rx_size
= 0;
2376 u32 checksum
, iov_count
= 0, padding
= 0;
2377 struct iscsi_conn
*conn
= cmd
->conn
;
2380 iov_ret
= iscsit_map_iovec(cmd
, cmd
->iov_data
, cmd
->write_data_done
, length
);
2382 return IMMEDIATE_DATA_CANNOT_RECOVER
;
2385 iov_count
= iov_ret
;
2386 iov
= &cmd
->iov_data
[0];
2388 padding
= ((-length
) & 3);
2390 iov
[iov_count
].iov_base
= cmd
->pad_bytes
;
2391 iov
[iov_count
++].iov_len
= padding
;
2395 if (conn
->conn_ops
->DataDigest
) {
2396 iov
[iov_count
].iov_base
= &checksum
;
2397 iov
[iov_count
++].iov_len
= ISCSI_CRC_LEN
;
2398 rx_size
+= ISCSI_CRC_LEN
;
2401 rx_got
= rx_data(conn
, &cmd
->iov_data
[0], iov_count
, rx_size
);
2403 iscsit_unmap_iovec(cmd
);
2405 if (rx_got
!= rx_size
) {
2406 iscsit_rx_thread_wait_for_tcp(conn
);
2407 return IMMEDIATE_DATA_CANNOT_RECOVER
;
2410 if (conn
->conn_ops
->DataDigest
) {
2413 data_crc
= iscsit_do_crypto_hash_sg(&conn
->conn_rx_hash
, cmd
,
2414 cmd
->write_data_done
, length
, padding
,
2417 if (checksum
!= data_crc
) {
2418 pr_err("ImmediateData CRC32C DataDigest 0x%08x"
2419 " does not match computed 0x%08x\n", checksum
,
2422 if (!conn
->sess
->sess_ops
->ErrorRecoveryLevel
) {
2423 pr_err("Unable to recover from"
2424 " Immediate Data digest failure while"
2426 iscsit_reject_cmd(cmd
,
2427 ISCSI_REASON_DATA_DIGEST_ERROR
,
2428 (unsigned char *)hdr
);
2429 return IMMEDIATE_DATA_CANNOT_RECOVER
;
2431 iscsit_reject_cmd(cmd
,
2432 ISCSI_REASON_DATA_DIGEST_ERROR
,
2433 (unsigned char *)hdr
);
2434 return IMMEDIATE_DATA_ERL1_CRC_FAILURE
;
2437 pr_debug("Got CRC32C DataDigest 0x%08x for"
2438 " %u bytes of Immediate Data\n", checksum
,
2443 cmd
->write_data_done
+= length
;
2445 if (cmd
->write_data_done
== cmd
->se_cmd
.data_length
) {
2446 spin_lock_bh(&cmd
->istate_lock
);
2447 cmd
->cmd_flags
|= ICF_GOT_LAST_DATAOUT
;
2448 cmd
->i_state
= ISTATE_RECEIVED_LAST_DATAOUT
;
2449 spin_unlock_bh(&cmd
->istate_lock
);
2452 return IMMEDIATE_DATA_NORMAL_OPERATION
;
2456 * Called with sess->conn_lock held.
2458 /* #warning iscsi_build_conn_drop_async_message() only sends out on connections
2459 with active network interface */
2460 static void iscsit_build_conn_drop_async_message(struct iscsi_conn
*conn
)
2462 struct iscsi_cmd
*cmd
;
2463 struct iscsi_conn
*conn_p
;
2466 * Only send a Asynchronous Message on connections whos network
2467 * interface is still functional.
2469 list_for_each_entry(conn_p
, &conn
->sess
->sess_conn_list
, conn_list
) {
2470 if (conn_p
->conn_state
== TARG_CONN_STATE_LOGGED_IN
) {
2471 iscsit_inc_conn_usage_count(conn_p
);
2479 cmd
= iscsit_allocate_cmd(conn_p
, GFP_ATOMIC
);
2481 iscsit_dec_conn_usage_count(conn_p
);
2485 cmd
->logout_cid
= conn
->cid
;
2486 cmd
->iscsi_opcode
= ISCSI_OP_ASYNC_EVENT
;
2487 cmd
->i_state
= ISTATE_SEND_ASYNCMSG
;
2489 spin_lock_bh(&conn_p
->cmd_lock
);
2490 list_add_tail(&cmd
->i_conn_node
, &conn_p
->conn_cmd_list
);
2491 spin_unlock_bh(&conn_p
->cmd_lock
);
2493 iscsit_add_cmd_to_response_queue(cmd
, conn_p
, cmd
->i_state
);
2494 iscsit_dec_conn_usage_count(conn_p
);
2497 static int iscsit_send_conn_drop_async_message(
2498 struct iscsi_cmd
*cmd
,
2499 struct iscsi_conn
*conn
)
2501 struct iscsi_async
*hdr
;
2503 cmd
->tx_size
= ISCSI_HDR_LEN
;
2504 cmd
->iscsi_opcode
= ISCSI_OP_ASYNC_EVENT
;
2506 hdr
= (struct iscsi_async
*) cmd
->pdu
;
2507 hdr
->opcode
= ISCSI_OP_ASYNC_EVENT
;
2508 hdr
->flags
= ISCSI_FLAG_CMD_FINAL
;
2509 cmd
->init_task_tag
= RESERVED_ITT
;
2510 cmd
->targ_xfer_tag
= 0xFFFFFFFF;
2511 put_unaligned_be64(0xFFFFFFFFFFFFFFFFULL
, &hdr
->rsvd4
[0]);
2512 cmd
->stat_sn
= conn
->stat_sn
++;
2513 hdr
->statsn
= cpu_to_be32(cmd
->stat_sn
);
2514 hdr
->exp_cmdsn
= cpu_to_be32(conn
->sess
->exp_cmd_sn
);
2515 hdr
->max_cmdsn
= cpu_to_be32(conn
->sess
->max_cmd_sn
);
2516 hdr
->async_event
= ISCSI_ASYNC_MSG_DROPPING_CONNECTION
;
2517 hdr
->param1
= cpu_to_be16(cmd
->logout_cid
);
2518 hdr
->param2
= cpu_to_be16(conn
->sess
->sess_ops
->DefaultTime2Wait
);
2519 hdr
->param3
= cpu_to_be16(conn
->sess
->sess_ops
->DefaultTime2Retain
);
2521 if (conn
->conn_ops
->HeaderDigest
) {
2522 u32
*header_digest
= (u32
*)&cmd
->pdu
[ISCSI_HDR_LEN
];
2524 iscsit_do_crypto_hash_buf(&conn
->conn_tx_hash
, hdr
,
2525 ISCSI_HDR_LEN
, 0, NULL
, (u8
*)header_digest
);
2527 cmd
->tx_size
+= ISCSI_CRC_LEN
;
2528 pr_debug("Attaching CRC32C HeaderDigest to"
2529 " Async Message 0x%08x\n", *header_digest
);
2532 cmd
->iov_misc
[0].iov_base
= cmd
->pdu
;
2533 cmd
->iov_misc
[0].iov_len
= cmd
->tx_size
;
2534 cmd
->iov_misc_count
= 1;
2536 pr_debug("Sending Connection Dropped Async Message StatSN:"
2537 " 0x%08x, for CID: %hu on CID: %hu\n", cmd
->stat_sn
,
2538 cmd
->logout_cid
, conn
->cid
);
2542 static void iscsit_tx_thread_wait_for_tcp(struct iscsi_conn
*conn
)
2544 if ((conn
->sock
->sk
->sk_shutdown
& SEND_SHUTDOWN
) ||
2545 (conn
->sock
->sk
->sk_shutdown
& RCV_SHUTDOWN
)) {
2546 wait_for_completion_interruptible_timeout(
2547 &conn
->tx_half_close_comp
,
2548 ISCSI_TX_THREAD_TCP_TIMEOUT
* HZ
);
2553 iscsit_build_datain_pdu(struct iscsi_cmd
*cmd
, struct iscsi_conn
*conn
,
2554 struct iscsi_datain
*datain
, struct iscsi_data_rsp
*hdr
,
2557 hdr
->opcode
= ISCSI_OP_SCSI_DATA_IN
;
2558 hdr
->flags
= datain
->flags
;
2559 if (hdr
->flags
& ISCSI_FLAG_DATA_STATUS
) {
2560 if (cmd
->se_cmd
.se_cmd_flags
& SCF_OVERFLOW_BIT
) {
2561 hdr
->flags
|= ISCSI_FLAG_DATA_OVERFLOW
;
2562 hdr
->residual_count
= cpu_to_be32(cmd
->se_cmd
.residual_count
);
2563 } else if (cmd
->se_cmd
.se_cmd_flags
& SCF_UNDERFLOW_BIT
) {
2564 hdr
->flags
|= ISCSI_FLAG_DATA_UNDERFLOW
;
2565 hdr
->residual_count
= cpu_to_be32(cmd
->se_cmd
.residual_count
);
2568 hton24(hdr
->dlength
, datain
->length
);
2569 if (hdr
->flags
& ISCSI_FLAG_DATA_ACK
)
2570 int_to_scsilun(cmd
->se_cmd
.orig_fe_lun
,
2571 (struct scsi_lun
*)&hdr
->lun
);
2573 put_unaligned_le64(0xFFFFFFFFFFFFFFFFULL
, &hdr
->lun
);
2575 hdr
->itt
= cmd
->init_task_tag
;
2577 if (hdr
->flags
& ISCSI_FLAG_DATA_ACK
)
2578 hdr
->ttt
= cpu_to_be32(cmd
->targ_xfer_tag
);
2580 hdr
->ttt
= cpu_to_be32(0xFFFFFFFF);
2582 hdr
->statsn
= cpu_to_be32(cmd
->stat_sn
);
2584 hdr
->statsn
= cpu_to_be32(0xFFFFFFFF);
2586 hdr
->exp_cmdsn
= cpu_to_be32(conn
->sess
->exp_cmd_sn
);
2587 hdr
->max_cmdsn
= cpu_to_be32(conn
->sess
->max_cmd_sn
);
2588 hdr
->datasn
= cpu_to_be32(datain
->data_sn
);
2589 hdr
->offset
= cpu_to_be32(datain
->offset
);
2591 pr_debug("Built DataIN ITT: 0x%08x, StatSN: 0x%08x,"
2592 " DataSN: 0x%08x, Offset: %u, Length: %u, CID: %hu\n",
2593 cmd
->init_task_tag
, ntohl(hdr
->statsn
), ntohl(hdr
->datasn
),
2594 ntohl(hdr
->offset
), datain
->length
, conn
->cid
);
2597 static int iscsit_send_datain(struct iscsi_cmd
*cmd
, struct iscsi_conn
*conn
)
2599 struct iscsi_data_rsp
*hdr
= (struct iscsi_data_rsp
*)&cmd
->pdu
[0];
2600 struct iscsi_datain datain
;
2601 struct iscsi_datain_req
*dr
;
2603 u32 iov_count
= 0, tx_size
= 0;
2604 int eodr
= 0, ret
, iov_ret
;
2605 bool set_statsn
= false;
2607 memset(&datain
, 0, sizeof(struct iscsi_datain
));
2608 dr
= iscsit_get_datain_values(cmd
, &datain
);
2610 pr_err("iscsit_get_datain_values failed for ITT: 0x%08x\n",
2611 cmd
->init_task_tag
);
2615 * Be paranoid and double check the logic for now.
2617 if ((datain
.offset
+ datain
.length
) > cmd
->se_cmd
.data_length
) {
2618 pr_err("Command ITT: 0x%08x, datain.offset: %u and"
2619 " datain.length: %u exceeds cmd->data_length: %u\n",
2620 cmd
->init_task_tag
, datain
.offset
, datain
.length
,
2621 cmd
->se_cmd
.data_length
);
2625 atomic_long_add(datain
.length
, &conn
->sess
->tx_data_octets
);
2627 * Special case for successfully execution w/ both DATAIN
2630 if ((datain
.flags
& ISCSI_FLAG_DATA_STATUS
) &&
2631 (cmd
->se_cmd
.se_cmd_flags
& SCF_TRANSPORT_TASK_SENSE
))
2632 datain
.flags
&= ~ISCSI_FLAG_DATA_STATUS
;
2634 if ((dr
->dr_complete
== DATAIN_COMPLETE_NORMAL
) ||
2635 (dr
->dr_complete
== DATAIN_COMPLETE_CONNECTION_RECOVERY
)) {
2636 iscsit_increment_maxcmdsn(cmd
, conn
->sess
);
2637 cmd
->stat_sn
= conn
->stat_sn
++;
2639 } else if (dr
->dr_complete
==
2640 DATAIN_COMPLETE_WITHIN_COMMAND_RECOVERY
)
2644 iscsit_build_datain_pdu(cmd
, conn
, &datain
, hdr
, set_statsn
);
2646 iov
= &cmd
->iov_data
[0];
2647 iov
[iov_count
].iov_base
= cmd
->pdu
;
2648 iov
[iov_count
++].iov_len
= ISCSI_HDR_LEN
;
2649 tx_size
+= ISCSI_HDR_LEN
;
2651 if (conn
->conn_ops
->HeaderDigest
) {
2652 u32
*header_digest
= (u32
*)&cmd
->pdu
[ISCSI_HDR_LEN
];
2654 iscsit_do_crypto_hash_buf(&conn
->conn_tx_hash
, cmd
->pdu
,
2655 ISCSI_HDR_LEN
, 0, NULL
, (u8
*)header_digest
);
2657 iov
[0].iov_len
+= ISCSI_CRC_LEN
;
2658 tx_size
+= ISCSI_CRC_LEN
;
2660 pr_debug("Attaching CRC32 HeaderDigest"
2661 " for DataIN PDU 0x%08x\n", *header_digest
);
2664 iov_ret
= iscsit_map_iovec(cmd
, &cmd
->iov_data
[1],
2665 datain
.offset
, datain
.length
);
2669 iov_count
+= iov_ret
;
2670 tx_size
+= datain
.length
;
2672 cmd
->padding
= ((-datain
.length
) & 3);
2674 iov
[iov_count
].iov_base
= cmd
->pad_bytes
;
2675 iov
[iov_count
++].iov_len
= cmd
->padding
;
2676 tx_size
+= cmd
->padding
;
2678 pr_debug("Attaching %u padding bytes\n",
2681 if (conn
->conn_ops
->DataDigest
) {
2682 cmd
->data_crc
= iscsit_do_crypto_hash_sg(&conn
->conn_tx_hash
, cmd
,
2683 datain
.offset
, datain
.length
, cmd
->padding
, cmd
->pad_bytes
);
2685 iov
[iov_count
].iov_base
= &cmd
->data_crc
;
2686 iov
[iov_count
++].iov_len
= ISCSI_CRC_LEN
;
2687 tx_size
+= ISCSI_CRC_LEN
;
2689 pr_debug("Attached CRC32C DataDigest %d bytes, crc"
2690 " 0x%08x\n", datain
.length
+cmd
->padding
, cmd
->data_crc
);
2693 cmd
->iov_data_count
= iov_count
;
2694 cmd
->tx_size
= tx_size
;
2696 /* sendpage is preferred but can't insert markers */
2697 if (!conn
->conn_ops
->IFMarker
)
2698 ret
= iscsit_fe_sendpage_sg(cmd
, conn
);
2700 ret
= iscsit_send_tx_data(cmd
, conn
, 0);
2702 iscsit_unmap_iovec(cmd
);
2705 iscsit_tx_thread_wait_for_tcp(conn
);
2709 if (dr
->dr_complete
) {
2710 eodr
= (cmd
->se_cmd
.se_cmd_flags
& SCF_TRANSPORT_TASK_SENSE
) ?
2712 iscsit_free_datain_req(cmd
, dr
);
2719 iscsit_build_logout_rsp(struct iscsi_cmd
*cmd
, struct iscsi_conn
*conn
,
2720 struct iscsi_logout_rsp
*hdr
)
2722 struct iscsi_conn
*logout_conn
= NULL
;
2723 struct iscsi_conn_recovery
*cr
= NULL
;
2724 struct iscsi_session
*sess
= conn
->sess
;
2726 * The actual shutting down of Sessions and/or Connections
2727 * for CLOSESESSION and CLOSECONNECTION Logout Requests
2728 * is done in scsi_logout_post_handler().
2730 switch (cmd
->logout_reason
) {
2731 case ISCSI_LOGOUT_REASON_CLOSE_SESSION
:
2732 pr_debug("iSCSI session logout successful, setting"
2733 " logout response to ISCSI_LOGOUT_SUCCESS.\n");
2734 cmd
->logout_response
= ISCSI_LOGOUT_SUCCESS
;
2736 case ISCSI_LOGOUT_REASON_CLOSE_CONNECTION
:
2737 if (cmd
->logout_response
== ISCSI_LOGOUT_CID_NOT_FOUND
)
2740 * For CLOSECONNECTION logout requests carrying
2741 * a matching logout CID -> local CID, the reference
2742 * for the local CID will have been incremented in
2743 * iscsi_logout_closeconnection().
2745 * For CLOSECONNECTION logout requests carrying
2746 * a different CID than the connection it arrived
2747 * on, the connection responding to cmd->logout_cid
2748 * is stopped in iscsit_logout_post_handler_diffcid().
2751 pr_debug("iSCSI CID: %hu logout on CID: %hu"
2752 " successful.\n", cmd
->logout_cid
, conn
->cid
);
2753 cmd
->logout_response
= ISCSI_LOGOUT_SUCCESS
;
2755 case ISCSI_LOGOUT_REASON_RECOVERY
:
2756 if ((cmd
->logout_response
== ISCSI_LOGOUT_RECOVERY_UNSUPPORTED
) ||
2757 (cmd
->logout_response
== ISCSI_LOGOUT_CLEANUP_FAILED
))
2760 * If the connection is still active from our point of view
2761 * force connection recovery to occur.
2763 logout_conn
= iscsit_get_conn_from_cid_rcfr(sess
,
2766 iscsit_connection_reinstatement_rcfr(logout_conn
);
2767 iscsit_dec_conn_usage_count(logout_conn
);
2770 cr
= iscsit_get_inactive_connection_recovery_entry(
2771 conn
->sess
, cmd
->logout_cid
);
2773 pr_err("Unable to locate CID: %hu for"
2774 " REMOVECONNFORRECOVERY Logout Request.\n",
2776 cmd
->logout_response
= ISCSI_LOGOUT_CID_NOT_FOUND
;
2780 iscsit_discard_cr_cmds_by_expstatsn(cr
, cmd
->exp_stat_sn
);
2782 pr_debug("iSCSI REMOVECONNFORRECOVERY logout"
2783 " for recovery for CID: %hu on CID: %hu successful.\n",
2784 cmd
->logout_cid
, conn
->cid
);
2785 cmd
->logout_response
= ISCSI_LOGOUT_SUCCESS
;
2788 pr_err("Unknown cmd->logout_reason: 0x%02x\n",
2789 cmd
->logout_reason
);
2793 hdr
->opcode
= ISCSI_OP_LOGOUT_RSP
;
2794 hdr
->flags
|= ISCSI_FLAG_CMD_FINAL
;
2795 hdr
->response
= cmd
->logout_response
;
2796 hdr
->itt
= cmd
->init_task_tag
;
2797 cmd
->stat_sn
= conn
->stat_sn
++;
2798 hdr
->statsn
= cpu_to_be32(cmd
->stat_sn
);
2800 iscsit_increment_maxcmdsn(cmd
, conn
->sess
);
2801 hdr
->exp_cmdsn
= cpu_to_be32(conn
->sess
->exp_cmd_sn
);
2802 hdr
->max_cmdsn
= cpu_to_be32(conn
->sess
->max_cmd_sn
);
2804 pr_debug("Built Logout Response ITT: 0x%08x StatSN:"
2805 " 0x%08x Response: 0x%02x CID: %hu on CID: %hu\n",
2806 cmd
->init_task_tag
, cmd
->stat_sn
, hdr
->response
,
2807 cmd
->logout_cid
, conn
->cid
);
2811 EXPORT_SYMBOL(iscsit_build_logout_rsp
);
2814 iscsit_send_logout(struct iscsi_cmd
*cmd
, struct iscsi_conn
*conn
)
2817 int niov
= 0, tx_size
, rc
;
2819 rc
= iscsit_build_logout_rsp(cmd
, conn
,
2820 (struct iscsi_logout_rsp
*)&cmd
->pdu
[0]);
2824 tx_size
= ISCSI_HDR_LEN
;
2825 iov
= &cmd
->iov_misc
[0];
2826 iov
[niov
].iov_base
= cmd
->pdu
;
2827 iov
[niov
++].iov_len
= ISCSI_HDR_LEN
;
2829 if (conn
->conn_ops
->HeaderDigest
) {
2830 u32
*header_digest
= (u32
*)&cmd
->pdu
[ISCSI_HDR_LEN
];
2832 iscsit_do_crypto_hash_buf(&conn
->conn_tx_hash
, &cmd
->pdu
[0],
2833 ISCSI_HDR_LEN
, 0, NULL
, (u8
*)header_digest
);
2835 iov
[0].iov_len
+= ISCSI_CRC_LEN
;
2836 tx_size
+= ISCSI_CRC_LEN
;
2837 pr_debug("Attaching CRC32C HeaderDigest to"
2838 " Logout Response 0x%08x\n", *header_digest
);
2840 cmd
->iov_misc_count
= niov
;
2841 cmd
->tx_size
= tx_size
;
2847 iscsit_build_nopin_rsp(struct iscsi_cmd
*cmd
, struct iscsi_conn
*conn
,
2848 struct iscsi_nopin
*hdr
, bool nopout_response
)
2850 hdr
->opcode
= ISCSI_OP_NOOP_IN
;
2851 hdr
->flags
|= ISCSI_FLAG_CMD_FINAL
;
2852 hton24(hdr
->dlength
, cmd
->buf_ptr_size
);
2853 if (nopout_response
)
2854 put_unaligned_le64(0xFFFFFFFFFFFFFFFFULL
, &hdr
->lun
);
2855 hdr
->itt
= cmd
->init_task_tag
;
2856 hdr
->ttt
= cpu_to_be32(cmd
->targ_xfer_tag
);
2857 cmd
->stat_sn
= (nopout_response
) ? conn
->stat_sn
++ :
2859 hdr
->statsn
= cpu_to_be32(cmd
->stat_sn
);
2861 if (nopout_response
)
2862 iscsit_increment_maxcmdsn(cmd
, conn
->sess
);
2864 hdr
->exp_cmdsn
= cpu_to_be32(conn
->sess
->exp_cmd_sn
);
2865 hdr
->max_cmdsn
= cpu_to_be32(conn
->sess
->max_cmd_sn
);
2867 pr_debug("Built NOPIN %s Response ITT: 0x%08x, TTT: 0x%08x,"
2868 " StatSN: 0x%08x, Length %u\n", (nopout_response
) ?
2869 "Solicitied" : "Unsolicitied", cmd
->init_task_tag
,
2870 cmd
->targ_xfer_tag
, cmd
->stat_sn
, cmd
->buf_ptr_size
);
2872 EXPORT_SYMBOL(iscsit_build_nopin_rsp
);
2875 * Unsolicited NOPIN, either requesting a response or not.
2877 static int iscsit_send_unsolicited_nopin(
2878 struct iscsi_cmd
*cmd
,
2879 struct iscsi_conn
*conn
,
2882 struct iscsi_nopin
*hdr
= (struct iscsi_nopin
*)&cmd
->pdu
[0];
2883 int tx_size
= ISCSI_HDR_LEN
, ret
;
2885 iscsit_build_nopin_rsp(cmd
, conn
, hdr
, false);
2887 if (conn
->conn_ops
->HeaderDigest
) {
2888 u32
*header_digest
= (u32
*)&cmd
->pdu
[ISCSI_HDR_LEN
];
2890 iscsit_do_crypto_hash_buf(&conn
->conn_tx_hash
, hdr
,
2891 ISCSI_HDR_LEN
, 0, NULL
, (u8
*)header_digest
);
2893 tx_size
+= ISCSI_CRC_LEN
;
2894 pr_debug("Attaching CRC32C HeaderDigest to"
2895 " NopIN 0x%08x\n", *header_digest
);
2898 cmd
->iov_misc
[0].iov_base
= cmd
->pdu
;
2899 cmd
->iov_misc
[0].iov_len
= tx_size
;
2900 cmd
->iov_misc_count
= 1;
2901 cmd
->tx_size
= tx_size
;
2903 pr_debug("Sending Unsolicited NOPIN TTT: 0x%08x StatSN:"
2904 " 0x%08x CID: %hu\n", hdr
->ttt
, cmd
->stat_sn
, conn
->cid
);
2906 ret
= iscsit_send_tx_data(cmd
, conn
, 1);
2908 iscsit_tx_thread_wait_for_tcp(conn
);
2912 spin_lock_bh(&cmd
->istate_lock
);
2913 cmd
->i_state
= want_response
?
2914 ISTATE_SENT_NOPIN_WANT_RESPONSE
: ISTATE_SENT_STATUS
;
2915 spin_unlock_bh(&cmd
->istate_lock
);
2921 iscsit_send_nopin(struct iscsi_cmd
*cmd
, struct iscsi_conn
*conn
)
2923 struct iscsi_nopin
*hdr
= (struct iscsi_nopin
*)&cmd
->pdu
[0];
2926 int niov
= 0, tx_size
;
2928 iscsit_build_nopin_rsp(cmd
, conn
, hdr
, true);
2930 tx_size
= ISCSI_HDR_LEN
;
2931 iov
= &cmd
->iov_misc
[0];
2932 iov
[niov
].iov_base
= cmd
->pdu
;
2933 iov
[niov
++].iov_len
= ISCSI_HDR_LEN
;
2935 if (conn
->conn_ops
->HeaderDigest
) {
2936 u32
*header_digest
= (u32
*)&cmd
->pdu
[ISCSI_HDR_LEN
];
2938 iscsit_do_crypto_hash_buf(&conn
->conn_tx_hash
, hdr
,
2939 ISCSI_HDR_LEN
, 0, NULL
, (u8
*)header_digest
);
2941 iov
[0].iov_len
+= ISCSI_CRC_LEN
;
2942 tx_size
+= ISCSI_CRC_LEN
;
2943 pr_debug("Attaching CRC32C HeaderDigest"
2944 " to NopIn 0x%08x\n", *header_digest
);
2948 * NOPOUT Ping Data is attached to struct iscsi_cmd->buf_ptr.
2949 * NOPOUT DataSegmentLength is at struct iscsi_cmd->buf_ptr_size.
2951 if (cmd
->buf_ptr_size
) {
2952 iov
[niov
].iov_base
= cmd
->buf_ptr
;
2953 iov
[niov
++].iov_len
= cmd
->buf_ptr_size
;
2954 tx_size
+= cmd
->buf_ptr_size
;
2956 pr_debug("Echoing back %u bytes of ping"
2957 " data.\n", cmd
->buf_ptr_size
);
2959 padding
= ((-cmd
->buf_ptr_size
) & 3);
2961 iov
[niov
].iov_base
= &cmd
->pad_bytes
;
2962 iov
[niov
++].iov_len
= padding
;
2964 pr_debug("Attaching %u additional"
2965 " padding bytes.\n", padding
);
2967 if (conn
->conn_ops
->DataDigest
) {
2968 iscsit_do_crypto_hash_buf(&conn
->conn_tx_hash
,
2969 cmd
->buf_ptr
, cmd
->buf_ptr_size
,
2970 padding
, (u8
*)&cmd
->pad_bytes
,
2971 (u8
*)&cmd
->data_crc
);
2973 iov
[niov
].iov_base
= &cmd
->data_crc
;
2974 iov
[niov
++].iov_len
= ISCSI_CRC_LEN
;
2975 tx_size
+= ISCSI_CRC_LEN
;
2976 pr_debug("Attached DataDigest for %u"
2977 " bytes of ping data, CRC 0x%08x\n",
2978 cmd
->buf_ptr_size
, cmd
->data_crc
);
2982 cmd
->iov_misc_count
= niov
;
2983 cmd
->tx_size
= tx_size
;
2988 static int iscsit_send_r2t(
2989 struct iscsi_cmd
*cmd
,
2990 struct iscsi_conn
*conn
)
2993 struct iscsi_r2t
*r2t
;
2994 struct iscsi_r2t_rsp
*hdr
;
2997 r2t
= iscsit_get_r2t_from_list(cmd
);
3001 hdr
= (struct iscsi_r2t_rsp
*) cmd
->pdu
;
3002 memset(hdr
, 0, ISCSI_HDR_LEN
);
3003 hdr
->opcode
= ISCSI_OP_R2T
;
3004 hdr
->flags
|= ISCSI_FLAG_CMD_FINAL
;
3005 int_to_scsilun(cmd
->se_cmd
.orig_fe_lun
,
3006 (struct scsi_lun
*)&hdr
->lun
);
3007 hdr
->itt
= cmd
->init_task_tag
;
3008 spin_lock_bh(&conn
->sess
->ttt_lock
);
3009 r2t
->targ_xfer_tag
= conn
->sess
->targ_xfer_tag
++;
3010 if (r2t
->targ_xfer_tag
== 0xFFFFFFFF)
3011 r2t
->targ_xfer_tag
= conn
->sess
->targ_xfer_tag
++;
3012 spin_unlock_bh(&conn
->sess
->ttt_lock
);
3013 hdr
->ttt
= cpu_to_be32(r2t
->targ_xfer_tag
);
3014 hdr
->statsn
= cpu_to_be32(conn
->stat_sn
);
3015 hdr
->exp_cmdsn
= cpu_to_be32(conn
->sess
->exp_cmd_sn
);
3016 hdr
->max_cmdsn
= cpu_to_be32(conn
->sess
->max_cmd_sn
);
3017 hdr
->r2tsn
= cpu_to_be32(r2t
->r2t_sn
);
3018 hdr
->data_offset
= cpu_to_be32(r2t
->offset
);
3019 hdr
->data_length
= cpu_to_be32(r2t
->xfer_len
);
3021 cmd
->iov_misc
[0].iov_base
= cmd
->pdu
;
3022 cmd
->iov_misc
[0].iov_len
= ISCSI_HDR_LEN
;
3023 tx_size
+= ISCSI_HDR_LEN
;
3025 if (conn
->conn_ops
->HeaderDigest
) {
3026 u32
*header_digest
= (u32
*)&cmd
->pdu
[ISCSI_HDR_LEN
];
3028 iscsit_do_crypto_hash_buf(&conn
->conn_tx_hash
, hdr
,
3029 ISCSI_HDR_LEN
, 0, NULL
, (u8
*)header_digest
);
3031 cmd
->iov_misc
[0].iov_len
+= ISCSI_CRC_LEN
;
3032 tx_size
+= ISCSI_CRC_LEN
;
3033 pr_debug("Attaching CRC32 HeaderDigest for R2T"
3034 " PDU 0x%08x\n", *header_digest
);
3037 pr_debug("Built %sR2T, ITT: 0x%08x, TTT: 0x%08x, StatSN:"
3038 " 0x%08x, R2TSN: 0x%08x, Offset: %u, DDTL: %u, CID: %hu\n",
3039 (!r2t
->recovery_r2t
) ? "" : "Recovery ", cmd
->init_task_tag
,
3040 r2t
->targ_xfer_tag
, ntohl(hdr
->statsn
), r2t
->r2t_sn
,
3041 r2t
->offset
, r2t
->xfer_len
, conn
->cid
);
3043 cmd
->iov_misc_count
= 1;
3044 cmd
->tx_size
= tx_size
;
3046 spin_lock_bh(&cmd
->r2t_lock
);
3048 spin_unlock_bh(&cmd
->r2t_lock
);
3050 ret
= iscsit_send_tx_data(cmd
, conn
, 1);
3052 iscsit_tx_thread_wait_for_tcp(conn
);
3056 spin_lock_bh(&cmd
->dataout_timeout_lock
);
3057 iscsit_start_dataout_timer(cmd
, conn
);
3058 spin_unlock_bh(&cmd
->dataout_timeout_lock
);
3064 * @recovery: If called from iscsi_task_reassign_complete_write() for
3065 * connection recovery.
3067 int iscsit_build_r2ts_for_cmd(
3068 struct iscsi_conn
*conn
,
3069 struct iscsi_cmd
*cmd
,
3073 u32 offset
= 0, xfer_len
= 0;
3075 spin_lock_bh(&cmd
->r2t_lock
);
3076 if (cmd
->cmd_flags
& ICF_SENT_LAST_R2T
) {
3077 spin_unlock_bh(&cmd
->r2t_lock
);
3081 if (conn
->sess
->sess_ops
->DataSequenceInOrder
&&
3083 cmd
->r2t_offset
= max(cmd
->r2t_offset
, cmd
->write_data_done
);
3085 while (cmd
->outstanding_r2ts
< conn
->sess
->sess_ops
->MaxOutstandingR2T
) {
3086 if (conn
->sess
->sess_ops
->DataSequenceInOrder
) {
3087 offset
= cmd
->r2t_offset
;
3089 if (first_r2t
&& recovery
) {
3090 int new_data_end
= offset
+
3091 conn
->sess
->sess_ops
->MaxBurstLength
-
3092 cmd
->next_burst_len
;
3094 if (new_data_end
> cmd
->se_cmd
.data_length
)
3095 xfer_len
= cmd
->se_cmd
.data_length
- offset
;
3098 conn
->sess
->sess_ops
->MaxBurstLength
-
3099 cmd
->next_burst_len
;
3101 int new_data_end
= offset
+
3102 conn
->sess
->sess_ops
->MaxBurstLength
;
3104 if (new_data_end
> cmd
->se_cmd
.data_length
)
3105 xfer_len
= cmd
->se_cmd
.data_length
- offset
;
3107 xfer_len
= conn
->sess
->sess_ops
->MaxBurstLength
;
3109 cmd
->r2t_offset
+= xfer_len
;
3111 if (cmd
->r2t_offset
== cmd
->se_cmd
.data_length
)
3112 cmd
->cmd_flags
|= ICF_SENT_LAST_R2T
;
3114 struct iscsi_seq
*seq
;
3116 seq
= iscsit_get_seq_holder_for_r2t(cmd
);
3118 spin_unlock_bh(&cmd
->r2t_lock
);
3122 offset
= seq
->offset
;
3123 xfer_len
= seq
->xfer_len
;
3125 if (cmd
->seq_send_order
== cmd
->seq_count
)
3126 cmd
->cmd_flags
|= ICF_SENT_LAST_R2T
;
3128 cmd
->outstanding_r2ts
++;
3131 if (iscsit_add_r2t_to_list(cmd
, offset
, xfer_len
, 0, 0) < 0) {
3132 spin_unlock_bh(&cmd
->r2t_lock
);
3136 if (cmd
->cmd_flags
& ICF_SENT_LAST_R2T
)
3139 spin_unlock_bh(&cmd
->r2t_lock
);
3144 void iscsit_build_rsp_pdu(struct iscsi_cmd
*cmd
, struct iscsi_conn
*conn
,
3145 bool inc_stat_sn
, struct iscsi_scsi_rsp
*hdr
)
3148 cmd
->stat_sn
= conn
->stat_sn
++;
3150 atomic_long_inc(&conn
->sess
->rsp_pdus
);
3152 memset(hdr
, 0, ISCSI_HDR_LEN
);
3153 hdr
->opcode
= ISCSI_OP_SCSI_CMD_RSP
;
3154 hdr
->flags
|= ISCSI_FLAG_CMD_FINAL
;
3155 if (cmd
->se_cmd
.se_cmd_flags
& SCF_OVERFLOW_BIT
) {
3156 hdr
->flags
|= ISCSI_FLAG_CMD_OVERFLOW
;
3157 hdr
->residual_count
= cpu_to_be32(cmd
->se_cmd
.residual_count
);
3158 } else if (cmd
->se_cmd
.se_cmd_flags
& SCF_UNDERFLOW_BIT
) {
3159 hdr
->flags
|= ISCSI_FLAG_CMD_UNDERFLOW
;
3160 hdr
->residual_count
= cpu_to_be32(cmd
->se_cmd
.residual_count
);
3162 hdr
->response
= cmd
->iscsi_response
;
3163 hdr
->cmd_status
= cmd
->se_cmd
.scsi_status
;
3164 hdr
->itt
= cmd
->init_task_tag
;
3165 hdr
->statsn
= cpu_to_be32(cmd
->stat_sn
);
3167 iscsit_increment_maxcmdsn(cmd
, conn
->sess
);
3168 hdr
->exp_cmdsn
= cpu_to_be32(conn
->sess
->exp_cmd_sn
);
3169 hdr
->max_cmdsn
= cpu_to_be32(conn
->sess
->max_cmd_sn
);
3171 pr_debug("Built SCSI Response, ITT: 0x%08x, StatSN: 0x%08x,"
3172 " Response: 0x%02x, SAM Status: 0x%02x, CID: %hu\n",
3173 cmd
->init_task_tag
, cmd
->stat_sn
, cmd
->se_cmd
.scsi_status
,
3174 cmd
->se_cmd
.scsi_status
, conn
->cid
);
3176 EXPORT_SYMBOL(iscsit_build_rsp_pdu
);
3178 static int iscsit_send_response(struct iscsi_cmd
*cmd
, struct iscsi_conn
*conn
)
3180 struct iscsi_scsi_rsp
*hdr
= (struct iscsi_scsi_rsp
*)&cmd
->pdu
[0];
3182 u32 padding
= 0, tx_size
= 0;
3184 bool inc_stat_sn
= (cmd
->i_state
== ISTATE_SEND_STATUS
);
3186 iscsit_build_rsp_pdu(cmd
, conn
, inc_stat_sn
, hdr
);
3188 iov
= &cmd
->iov_misc
[0];
3189 iov
[iov_count
].iov_base
= cmd
->pdu
;
3190 iov
[iov_count
++].iov_len
= ISCSI_HDR_LEN
;
3191 tx_size
+= ISCSI_HDR_LEN
;
3194 * Attach SENSE DATA payload to iSCSI Response PDU
3196 if (cmd
->se_cmd
.sense_buffer
&&
3197 ((cmd
->se_cmd
.se_cmd_flags
& SCF_TRANSPORT_TASK_SENSE
) ||
3198 (cmd
->se_cmd
.se_cmd_flags
& SCF_EMULATED_TASK_SENSE
))) {
3199 put_unaligned_be16(cmd
->se_cmd
.scsi_sense_length
, cmd
->sense_buffer
);
3200 cmd
->se_cmd
.scsi_sense_length
+= sizeof (__be16
);
3202 padding
= -(cmd
->se_cmd
.scsi_sense_length
) & 3;
3203 hton24(hdr
->dlength
, (u32
)cmd
->se_cmd
.scsi_sense_length
);
3204 iov
[iov_count
].iov_base
= cmd
->sense_buffer
;
3205 iov
[iov_count
++].iov_len
=
3206 (cmd
->se_cmd
.scsi_sense_length
+ padding
);
3207 tx_size
+= cmd
->se_cmd
.scsi_sense_length
;
3210 memset(cmd
->sense_buffer
+
3211 cmd
->se_cmd
.scsi_sense_length
, 0, padding
);
3213 pr_debug("Adding %u bytes of padding to"
3214 " SENSE.\n", padding
);
3217 if (conn
->conn_ops
->DataDigest
) {
3218 iscsit_do_crypto_hash_buf(&conn
->conn_tx_hash
,
3220 (cmd
->se_cmd
.scsi_sense_length
+ padding
),
3221 0, NULL
, (u8
*)&cmd
->data_crc
);
3223 iov
[iov_count
].iov_base
= &cmd
->data_crc
;
3224 iov
[iov_count
++].iov_len
= ISCSI_CRC_LEN
;
3225 tx_size
+= ISCSI_CRC_LEN
;
3227 pr_debug("Attaching CRC32 DataDigest for"
3228 " SENSE, %u bytes CRC 0x%08x\n",
3229 (cmd
->se_cmd
.scsi_sense_length
+ padding
),
3233 pr_debug("Attaching SENSE DATA: %u bytes to iSCSI"
3235 cmd
->se_cmd
.scsi_sense_length
);
3238 if (conn
->conn_ops
->HeaderDigest
) {
3239 u32
*header_digest
= (u32
*)&cmd
->pdu
[ISCSI_HDR_LEN
];
3241 iscsit_do_crypto_hash_buf(&conn
->conn_tx_hash
, cmd
->pdu
,
3242 ISCSI_HDR_LEN
, 0, NULL
, (u8
*)header_digest
);
3244 iov
[0].iov_len
+= ISCSI_CRC_LEN
;
3245 tx_size
+= ISCSI_CRC_LEN
;
3246 pr_debug("Attaching CRC32 HeaderDigest for Response"
3247 " PDU 0x%08x\n", *header_digest
);
3250 cmd
->iov_misc_count
= iov_count
;
3251 cmd
->tx_size
= tx_size
;
3256 static u8
iscsit_convert_tcm_tmr_rsp(struct se_tmr_req
*se_tmr
)
3258 switch (se_tmr
->response
) {
3259 case TMR_FUNCTION_COMPLETE
:
3260 return ISCSI_TMF_RSP_COMPLETE
;
3261 case TMR_TASK_DOES_NOT_EXIST
:
3262 return ISCSI_TMF_RSP_NO_TASK
;
3263 case TMR_LUN_DOES_NOT_EXIST
:
3264 return ISCSI_TMF_RSP_NO_LUN
;
3265 case TMR_TASK_MGMT_FUNCTION_NOT_SUPPORTED
:
3266 return ISCSI_TMF_RSP_NOT_SUPPORTED
;
3267 case TMR_FUNCTION_REJECTED
:
3269 return ISCSI_TMF_RSP_REJECTED
;
3274 iscsit_build_task_mgt_rsp(struct iscsi_cmd
*cmd
, struct iscsi_conn
*conn
,
3275 struct iscsi_tm_rsp
*hdr
)
3277 struct se_tmr_req
*se_tmr
= cmd
->se_cmd
.se_tmr_req
;
3279 hdr
->opcode
= ISCSI_OP_SCSI_TMFUNC_RSP
;
3280 hdr
->flags
= ISCSI_FLAG_CMD_FINAL
;
3281 hdr
->response
= iscsit_convert_tcm_tmr_rsp(se_tmr
);
3282 hdr
->itt
= cmd
->init_task_tag
;
3283 cmd
->stat_sn
= conn
->stat_sn
++;
3284 hdr
->statsn
= cpu_to_be32(cmd
->stat_sn
);
3286 iscsit_increment_maxcmdsn(cmd
, conn
->sess
);
3287 hdr
->exp_cmdsn
= cpu_to_be32(conn
->sess
->exp_cmd_sn
);
3288 hdr
->max_cmdsn
= cpu_to_be32(conn
->sess
->max_cmd_sn
);
3290 pr_debug("Built Task Management Response ITT: 0x%08x,"
3291 " StatSN: 0x%08x, Response: 0x%02x, CID: %hu\n",
3292 cmd
->init_task_tag
, cmd
->stat_sn
, hdr
->response
, conn
->cid
);
3294 EXPORT_SYMBOL(iscsit_build_task_mgt_rsp
);
3297 iscsit_send_task_mgt_rsp(struct iscsi_cmd
*cmd
, struct iscsi_conn
*conn
)
3299 struct iscsi_tm_rsp
*hdr
= (struct iscsi_tm_rsp
*)&cmd
->pdu
[0];
3302 iscsit_build_task_mgt_rsp(cmd
, conn
, hdr
);
3304 cmd
->iov_misc
[0].iov_base
= cmd
->pdu
;
3305 cmd
->iov_misc
[0].iov_len
= ISCSI_HDR_LEN
;
3306 tx_size
+= ISCSI_HDR_LEN
;
3308 if (conn
->conn_ops
->HeaderDigest
) {
3309 u32
*header_digest
= (u32
*)&cmd
->pdu
[ISCSI_HDR_LEN
];
3311 iscsit_do_crypto_hash_buf(&conn
->conn_tx_hash
, hdr
,
3312 ISCSI_HDR_LEN
, 0, NULL
, (u8
*)header_digest
);
3314 cmd
->iov_misc
[0].iov_len
+= ISCSI_CRC_LEN
;
3315 tx_size
+= ISCSI_CRC_LEN
;
3316 pr_debug("Attaching CRC32 HeaderDigest for Task"
3317 " Mgmt Response PDU 0x%08x\n", *header_digest
);
3320 cmd
->iov_misc_count
= 1;
3321 cmd
->tx_size
= tx_size
;
3326 static bool iscsit_check_inaddr_any(struct iscsi_np
*np
)
3330 if (np
->np_sockaddr
.ss_family
== AF_INET6
) {
3331 const struct sockaddr_in6 sin6
= {
3332 .sin6_addr
= IN6ADDR_ANY_INIT
};
3333 struct sockaddr_in6
*sock_in6
=
3334 (struct sockaddr_in6
*)&np
->np_sockaddr
;
3336 if (!memcmp(sock_in6
->sin6_addr
.s6_addr
,
3337 sin6
.sin6_addr
.s6_addr
, 16))
3340 struct sockaddr_in
* sock_in
=
3341 (struct sockaddr_in
*)&np
->np_sockaddr
;
3343 if (sock_in
->sin_addr
.s_addr
== htonl(INADDR_ANY
))
3350 #define SENDTARGETS_BUF_LIMIT 32768U
3352 static int iscsit_build_sendtargets_response(struct iscsi_cmd
*cmd
)
3354 char *payload
= NULL
;
3355 struct iscsi_conn
*conn
= cmd
->conn
;
3356 struct iscsi_portal_group
*tpg
;
3357 struct iscsi_tiqn
*tiqn
;
3358 struct iscsi_tpg_np
*tpg_np
;
3359 int buffer_len
, end_of_buf
= 0, len
= 0, payload_len
= 0;
3360 int target_name_printed
;
3361 unsigned char buf
[ISCSI_IQN_LEN
+12]; /* iqn + "TargetName=" + \0 */
3362 unsigned char *text_in
= cmd
->text_in_ptr
, *text_ptr
= NULL
;
3364 buffer_len
= max(conn
->conn_ops
->MaxRecvDataSegmentLength
,
3365 SENDTARGETS_BUF_LIMIT
);
3367 payload
= kzalloc(buffer_len
, GFP_KERNEL
);
3369 pr_err("Unable to allocate memory for sendtargets"
3374 * Locate pointer to iqn./eui. string for IFC_SENDTARGETS_SINGLE
3377 if (cmd
->cmd_flags
& IFC_SENDTARGETS_SINGLE
) {
3378 text_ptr
= strchr(text_in
, '=');
3380 pr_err("Unable to locate '=' string in text_in:"
3386 * Skip over '=' character..
3391 spin_lock(&tiqn_lock
);
3392 list_for_each_entry(tiqn
, &g_tiqn_list
, tiqn_list
) {
3393 if ((cmd
->cmd_flags
& IFC_SENDTARGETS_SINGLE
) &&
3394 strcmp(tiqn
->tiqn
, text_ptr
)) {
3398 target_name_printed
= 0;
3400 spin_lock(&tiqn
->tiqn_tpg_lock
);
3401 list_for_each_entry(tpg
, &tiqn
->tiqn_tpg_list
, tpg_list
) {
3403 /* If demo_mode_discovery=0 and generate_node_acls=0
3404 * (demo mode dislabed) do not return
3405 * TargetName+TargetAddress unless a NodeACL exists.
3408 if ((tpg
->tpg_attrib
.generate_node_acls
== 0) &&
3409 (tpg
->tpg_attrib
.demo_mode_discovery
== 0) &&
3410 (!core_tpg_get_initiator_node_acl(&tpg
->tpg_se_tpg
,
3411 cmd
->conn
->sess
->sess_ops
->InitiatorName
))) {
3415 spin_lock(&tpg
->tpg_state_lock
);
3416 if ((tpg
->tpg_state
== TPG_STATE_FREE
) ||
3417 (tpg
->tpg_state
== TPG_STATE_INACTIVE
)) {
3418 spin_unlock(&tpg
->tpg_state_lock
);
3421 spin_unlock(&tpg
->tpg_state_lock
);
3423 spin_lock(&tpg
->tpg_np_lock
);
3424 list_for_each_entry(tpg_np
, &tpg
->tpg_gnp_list
,
3426 struct iscsi_np
*np
= tpg_np
->tpg_np
;
3427 bool inaddr_any
= iscsit_check_inaddr_any(np
);
3429 if (!target_name_printed
) {
3430 len
= sprintf(buf
, "TargetName=%s",
3434 if ((len
+ payload_len
) > buffer_len
) {
3435 spin_unlock(&tpg
->tpg_np_lock
);
3436 spin_unlock(&tiqn
->tiqn_tpg_lock
);
3440 memcpy(payload
+ payload_len
, buf
, len
);
3442 target_name_printed
= 1;
3445 len
= sprintf(buf
, "TargetAddress="
3447 (inaddr_any
== false) ?
3448 np
->np_ip
: conn
->local_ip
,
3449 (inaddr_any
== false) ?
3450 np
->np_port
: conn
->local_port
,
3454 if ((len
+ payload_len
) > buffer_len
) {
3455 spin_unlock(&tpg
->tpg_np_lock
);
3456 spin_unlock(&tiqn
->tiqn_tpg_lock
);
3460 memcpy(payload
+ payload_len
, buf
, len
);
3463 spin_unlock(&tpg
->tpg_np_lock
);
3465 spin_unlock(&tiqn
->tiqn_tpg_lock
);
3470 if (cmd
->cmd_flags
& IFC_SENDTARGETS_SINGLE
)
3473 spin_unlock(&tiqn_lock
);
3475 cmd
->buf_ptr
= payload
;
3481 iscsit_build_text_rsp(struct iscsi_cmd
*cmd
, struct iscsi_conn
*conn
,
3482 struct iscsi_text_rsp
*hdr
)
3484 int text_length
, padding
;
3486 text_length
= iscsit_build_sendtargets_response(cmd
);
3487 if (text_length
< 0)
3490 hdr
->opcode
= ISCSI_OP_TEXT_RSP
;
3491 hdr
->flags
|= ISCSI_FLAG_CMD_FINAL
;
3492 padding
= ((-text_length
) & 3);
3493 hton24(hdr
->dlength
, text_length
);
3494 hdr
->itt
= cmd
->init_task_tag
;
3495 hdr
->ttt
= cpu_to_be32(cmd
->targ_xfer_tag
);
3496 cmd
->stat_sn
= conn
->stat_sn
++;
3497 hdr
->statsn
= cpu_to_be32(cmd
->stat_sn
);
3499 iscsit_increment_maxcmdsn(cmd
, conn
->sess
);
3500 hdr
->exp_cmdsn
= cpu_to_be32(conn
->sess
->exp_cmd_sn
);
3501 hdr
->max_cmdsn
= cpu_to_be32(conn
->sess
->max_cmd_sn
);
3503 pr_debug("Built Text Response: ITT: 0x%08x, StatSN: 0x%08x,"
3504 " Length: %u, CID: %hu\n", cmd
->init_task_tag
, cmd
->stat_sn
,
3505 text_length
, conn
->cid
);
3507 return text_length
+ padding
;
3509 EXPORT_SYMBOL(iscsit_build_text_rsp
);
3512 * FIXME: Add support for F_BIT and C_BIT when the length is longer than
3513 * MaxRecvDataSegmentLength.
3515 static int iscsit_send_text_rsp(
3516 struct iscsi_cmd
*cmd
,
3517 struct iscsi_conn
*conn
)
3519 struct iscsi_text_rsp
*hdr
= (struct iscsi_text_rsp
*)cmd
->pdu
;
3522 int text_length
, iov_count
= 0, rc
;
3524 rc
= iscsit_build_text_rsp(cmd
, conn
, hdr
);
3529 iov
= &cmd
->iov_misc
[0];
3530 iov
[iov_count
].iov_base
= cmd
->pdu
;
3531 iov
[iov_count
++].iov_len
= ISCSI_HDR_LEN
;
3532 iov
[iov_count
].iov_base
= cmd
->buf_ptr
;
3533 iov
[iov_count
++].iov_len
= text_length
;
3535 tx_size
+= (ISCSI_HDR_LEN
+ text_length
);
3537 if (conn
->conn_ops
->HeaderDigest
) {
3538 u32
*header_digest
= (u32
*)&cmd
->pdu
[ISCSI_HDR_LEN
];
3540 iscsit_do_crypto_hash_buf(&conn
->conn_tx_hash
, hdr
,
3541 ISCSI_HDR_LEN
, 0, NULL
, (u8
*)header_digest
);
3543 iov
[0].iov_len
+= ISCSI_CRC_LEN
;
3544 tx_size
+= ISCSI_CRC_LEN
;
3545 pr_debug("Attaching CRC32 HeaderDigest for"
3546 " Text Response PDU 0x%08x\n", *header_digest
);
3549 if (conn
->conn_ops
->DataDigest
) {
3550 iscsit_do_crypto_hash_buf(&conn
->conn_tx_hash
,
3551 cmd
->buf_ptr
, text_length
,
3552 0, NULL
, (u8
*)&cmd
->data_crc
);
3554 iov
[iov_count
].iov_base
= &cmd
->data_crc
;
3555 iov
[iov_count
++].iov_len
= ISCSI_CRC_LEN
;
3556 tx_size
+= ISCSI_CRC_LEN
;
3558 pr_debug("Attaching DataDigest for %u bytes of text"
3559 " data, CRC 0x%08x\n", text_length
,
3563 cmd
->iov_misc_count
= iov_count
;
3564 cmd
->tx_size
= tx_size
;
3570 iscsit_build_reject(struct iscsi_cmd
*cmd
, struct iscsi_conn
*conn
,
3571 struct iscsi_reject
*hdr
)
3573 hdr
->opcode
= ISCSI_OP_REJECT
;
3574 hdr
->reason
= cmd
->reject_reason
;
3575 hdr
->flags
|= ISCSI_FLAG_CMD_FINAL
;
3576 hton24(hdr
->dlength
, ISCSI_HDR_LEN
);
3577 hdr
->ffffffff
= cpu_to_be32(0xffffffff);
3578 cmd
->stat_sn
= conn
->stat_sn
++;
3579 hdr
->statsn
= cpu_to_be32(cmd
->stat_sn
);
3580 hdr
->exp_cmdsn
= cpu_to_be32(conn
->sess
->exp_cmd_sn
);
3581 hdr
->max_cmdsn
= cpu_to_be32(conn
->sess
->max_cmd_sn
);
3584 EXPORT_SYMBOL(iscsit_build_reject
);
3586 static int iscsit_send_reject(
3587 struct iscsi_cmd
*cmd
,
3588 struct iscsi_conn
*conn
)
3590 struct iscsi_reject
*hdr
= (struct iscsi_reject
*)&cmd
->pdu
[0];
3592 u32 iov_count
= 0, tx_size
;
3594 iscsit_build_reject(cmd
, conn
, hdr
);
3596 iov
= &cmd
->iov_misc
[0];
3597 iov
[iov_count
].iov_base
= cmd
->pdu
;
3598 iov
[iov_count
++].iov_len
= ISCSI_HDR_LEN
;
3599 iov
[iov_count
].iov_base
= cmd
->buf_ptr
;
3600 iov
[iov_count
++].iov_len
= ISCSI_HDR_LEN
;
3602 tx_size
= (ISCSI_HDR_LEN
+ ISCSI_HDR_LEN
);
3604 if (conn
->conn_ops
->HeaderDigest
) {
3605 u32
*header_digest
= (u32
*)&cmd
->pdu
[ISCSI_HDR_LEN
];
3607 iscsit_do_crypto_hash_buf(&conn
->conn_tx_hash
, hdr
,
3608 ISCSI_HDR_LEN
, 0, NULL
, (u8
*)header_digest
);
3610 iov
[0].iov_len
+= ISCSI_CRC_LEN
;
3611 tx_size
+= ISCSI_CRC_LEN
;
3612 pr_debug("Attaching CRC32 HeaderDigest for"
3613 " REJECT PDU 0x%08x\n", *header_digest
);
3616 if (conn
->conn_ops
->DataDigest
) {
3617 iscsit_do_crypto_hash_buf(&conn
->conn_tx_hash
, cmd
->buf_ptr
,
3618 ISCSI_HDR_LEN
, 0, NULL
, (u8
*)&cmd
->data_crc
);
3620 iov
[iov_count
].iov_base
= &cmd
->data_crc
;
3621 iov
[iov_count
++].iov_len
= ISCSI_CRC_LEN
;
3622 tx_size
+= ISCSI_CRC_LEN
;
3623 pr_debug("Attaching CRC32 DataDigest for REJECT"
3624 " PDU 0x%08x\n", cmd
->data_crc
);
3627 cmd
->iov_misc_count
= iov_count
;
3628 cmd
->tx_size
= tx_size
;
3630 pr_debug("Built Reject PDU StatSN: 0x%08x, Reason: 0x%02x,"
3631 " CID: %hu\n", ntohl(hdr
->statsn
), hdr
->reason
, conn
->cid
);
3636 void iscsit_thread_get_cpumask(struct iscsi_conn
*conn
)
3638 struct iscsi_thread_set
*ts
= conn
->thread_set
;
3641 * thread_id is assigned from iscsit_global->ts_bitmap from
3642 * within iscsi_thread_set.c:iscsi_allocate_thread_sets()
3644 * Here we use thread_id to determine which CPU that this
3645 * iSCSI connection's iscsi_thread_set will be scheduled to
3648 ord
= ts
->thread_id
% cpumask_weight(cpu_online_mask
);
3649 for_each_online_cpu(cpu
) {
3651 cpumask_set_cpu(cpu
, conn
->conn_cpumask
);
3656 * This should never be reached..
3659 cpumask_setall(conn
->conn_cpumask
);
3662 static inline void iscsit_thread_check_cpumask(
3663 struct iscsi_conn
*conn
,
3664 struct task_struct
*p
,
3669 * mode == 1 signals iscsi_target_tx_thread() usage.
3670 * mode == 0 signals iscsi_target_rx_thread() usage.
3673 if (!conn
->conn_tx_reset_cpumask
)
3675 conn
->conn_tx_reset_cpumask
= 0;
3677 if (!conn
->conn_rx_reset_cpumask
)
3679 conn
->conn_rx_reset_cpumask
= 0;
3682 * Update the CPU mask for this single kthread so that
3683 * both TX and RX kthreads are scheduled to run on the
3686 memset(buf
, 0, 128);
3687 cpumask_scnprintf(buf
, 128, conn
->conn_cpumask
);
3688 set_cpus_allowed_ptr(p
, conn
->conn_cpumask
);
3692 iscsit_immediate_queue(struct iscsi_conn
*conn
, struct iscsi_cmd
*cmd
, int state
)
3697 case ISTATE_SEND_R2T
:
3698 ret
= iscsit_send_r2t(cmd
, conn
);
3703 spin_lock_bh(&conn
->cmd_lock
);
3704 list_del(&cmd
->i_conn_node
);
3705 spin_unlock_bh(&conn
->cmd_lock
);
3707 iscsit_free_cmd(cmd
, false);
3709 case ISTATE_SEND_NOPIN_WANT_RESPONSE
:
3710 iscsit_mod_nopin_response_timer(conn
);
3711 ret
= iscsit_send_unsolicited_nopin(cmd
, conn
, 1);
3715 case ISTATE_SEND_NOPIN_NO_RESPONSE
:
3716 ret
= iscsit_send_unsolicited_nopin(cmd
, conn
, 0);
3721 pr_err("Unknown Opcode: 0x%02x ITT:"
3722 " 0x%08x, i_state: %d on CID: %hu\n",
3723 cmd
->iscsi_opcode
, cmd
->init_task_tag
, state
,
3735 iscsit_handle_immediate_queue(struct iscsi_conn
*conn
)
3737 struct iscsit_transport
*t
= conn
->conn_transport
;
3738 struct iscsi_queue_req
*qr
;
3739 struct iscsi_cmd
*cmd
;
3743 while ((qr
= iscsit_get_cmd_from_immediate_queue(conn
))) {
3744 atomic_set(&conn
->check_immediate_queue
, 0);
3747 kmem_cache_free(lio_qr_cache
, qr
);
3749 ret
= t
->iscsit_immediate_queue(conn
, cmd
, state
);
3758 iscsit_response_queue(struct iscsi_conn
*conn
, struct iscsi_cmd
*cmd
, int state
)
3764 case ISTATE_SEND_DATAIN
:
3765 ret
= iscsit_send_datain(cmd
, conn
);
3770 goto check_rsp_state
;
3771 else if (ret
== 1) {
3773 spin_lock_bh(&cmd
->istate_lock
);
3774 cmd
->i_state
= ISTATE_SENT_STATUS
;
3775 spin_unlock_bh(&cmd
->istate_lock
);
3777 if (atomic_read(&conn
->check_immediate_queue
))
3781 } else if (ret
== 2) {
3782 /* Still must send status,
3783 SCF_TRANSPORT_TASK_SENSE was set */
3784 spin_lock_bh(&cmd
->istate_lock
);
3785 cmd
->i_state
= ISTATE_SEND_STATUS
;
3786 spin_unlock_bh(&cmd
->istate_lock
);
3787 state
= ISTATE_SEND_STATUS
;
3788 goto check_rsp_state
;
3792 case ISTATE_SEND_STATUS
:
3793 case ISTATE_SEND_STATUS_RECOVERY
:
3794 ret
= iscsit_send_response(cmd
, conn
);
3796 case ISTATE_SEND_LOGOUTRSP
:
3797 ret
= iscsit_send_logout(cmd
, conn
);
3799 case ISTATE_SEND_ASYNCMSG
:
3800 ret
= iscsit_send_conn_drop_async_message(
3803 case ISTATE_SEND_NOPIN
:
3804 ret
= iscsit_send_nopin(cmd
, conn
);
3806 case ISTATE_SEND_REJECT
:
3807 ret
= iscsit_send_reject(cmd
, conn
);
3809 case ISTATE_SEND_TASKMGTRSP
:
3810 ret
= iscsit_send_task_mgt_rsp(cmd
, conn
);
3813 ret
= iscsit_tmr_post_handler(cmd
, conn
);
3815 iscsit_fall_back_to_erl0(conn
->sess
);
3817 case ISTATE_SEND_TEXTRSP
:
3818 ret
= iscsit_send_text_rsp(cmd
, conn
);
3821 pr_err("Unknown Opcode: 0x%02x ITT:"
3822 " 0x%08x, i_state: %d on CID: %hu\n",
3823 cmd
->iscsi_opcode
, cmd
->init_task_tag
,
3830 if (iscsit_send_tx_data(cmd
, conn
, 1) < 0) {
3831 iscsit_tx_thread_wait_for_tcp(conn
);
3832 iscsit_unmap_iovec(cmd
);
3835 iscsit_unmap_iovec(cmd
);
3838 case ISTATE_SEND_LOGOUTRSP
:
3839 if (!iscsit_logout_post_handler(cmd
, conn
))
3842 case ISTATE_SEND_STATUS
:
3843 case ISTATE_SEND_ASYNCMSG
:
3844 case ISTATE_SEND_NOPIN
:
3845 case ISTATE_SEND_STATUS_RECOVERY
:
3846 case ISTATE_SEND_TEXTRSP
:
3847 case ISTATE_SEND_TASKMGTRSP
:
3848 case ISTATE_SEND_REJECT
:
3849 spin_lock_bh(&cmd
->istate_lock
);
3850 cmd
->i_state
= ISTATE_SENT_STATUS
;
3851 spin_unlock_bh(&cmd
->istate_lock
);
3854 pr_err("Unknown Opcode: 0x%02x ITT:"
3855 " 0x%08x, i_state: %d on CID: %hu\n",
3856 cmd
->iscsi_opcode
, cmd
->init_task_tag
,
3857 cmd
->i_state
, conn
->cid
);
3861 if (atomic_read(&conn
->check_immediate_queue
))
3872 static int iscsit_handle_response_queue(struct iscsi_conn
*conn
)
3874 struct iscsit_transport
*t
= conn
->conn_transport
;
3875 struct iscsi_queue_req
*qr
;
3876 struct iscsi_cmd
*cmd
;
3880 while ((qr
= iscsit_get_cmd_from_response_queue(conn
))) {
3883 kmem_cache_free(lio_qr_cache
, qr
);
3885 ret
= t
->iscsit_response_queue(conn
, cmd
, state
);
3886 if (ret
== 1 || ret
< 0)
3893 int iscsi_target_tx_thread(void *arg
)
3896 struct iscsi_conn
*conn
;
3897 struct iscsi_thread_set
*ts
= arg
;
3899 * Allow ourselves to be interrupted by SIGINT so that a
3900 * connection recovery / failure event can be triggered externally.
3902 allow_signal(SIGINT
);
3905 conn
= iscsi_tx_thread_pre_handler(ts
);
3911 while (!kthread_should_stop()) {
3913 * Ensure that both TX and RX per connection kthreads
3914 * are scheduled to run on the same CPU.
3916 iscsit_thread_check_cpumask(conn
, current
, 1);
3918 wait_event_interruptible(conn
->queues_wq
,
3919 !iscsit_conn_all_queues_empty(conn
) ||
3920 ts
->status
== ISCSI_THREAD_SET_RESET
);
3922 if ((ts
->status
== ISCSI_THREAD_SET_RESET
) ||
3923 signal_pending(current
))
3927 ret
= iscsit_handle_immediate_queue(conn
);
3931 ret
= iscsit_handle_response_queue(conn
);
3934 else if (ret
== -EAGAIN
)
3941 iscsit_take_action_for_connection_exit(conn
);
3947 static int iscsi_target_rx_opcode(struct iscsi_conn
*conn
, unsigned char *buf
)
3949 struct iscsi_hdr
*hdr
= (struct iscsi_hdr
*)buf
;
3950 struct iscsi_cmd
*cmd
;
3953 switch (hdr
->opcode
& ISCSI_OPCODE_MASK
) {
3954 case ISCSI_OP_SCSI_CMD
:
3955 cmd
= iscsit_allocate_cmd(conn
, GFP_KERNEL
);
3959 ret
= iscsit_handle_scsi_cmd(conn
, cmd
, buf
);
3961 case ISCSI_OP_SCSI_DATA_OUT
:
3962 ret
= iscsit_handle_data_out(conn
, buf
);
3964 case ISCSI_OP_NOOP_OUT
:
3966 if (hdr
->ttt
== cpu_to_be32(0xFFFFFFFF)) {
3967 cmd
= iscsit_allocate_cmd(conn
, GFP_KERNEL
);
3971 ret
= iscsit_handle_nop_out(conn
, cmd
, buf
);
3973 case ISCSI_OP_SCSI_TMFUNC
:
3974 cmd
= iscsit_allocate_cmd(conn
, GFP_KERNEL
);
3978 ret
= iscsit_handle_task_mgt_cmd(conn
, cmd
, buf
);
3981 cmd
= iscsit_allocate_cmd(conn
, GFP_KERNEL
);
3985 ret
= iscsit_handle_text_cmd(conn
, cmd
, buf
);
3987 case ISCSI_OP_LOGOUT
:
3988 cmd
= iscsit_allocate_cmd(conn
, GFP_KERNEL
);
3992 ret
= iscsit_handle_logout_cmd(conn
, cmd
, buf
);
3994 wait_for_completion_timeout(&conn
->conn_logout_comp
,
3995 SECONDS_FOR_LOGOUT_COMP
* HZ
);
3997 case ISCSI_OP_SNACK
:
3998 ret
= iscsit_handle_snack(conn
, buf
);
4001 pr_err("Got unknown iSCSI OpCode: 0x%02x\n", hdr
->opcode
);
4002 if (!conn
->sess
->sess_ops
->ErrorRecoveryLevel
) {
4003 pr_err("Cannot recover from unknown"
4004 " opcode while ERL=0, closing iSCSI connection.\n");
4007 if (!conn
->conn_ops
->OFMarker
) {
4008 pr_err("Unable to recover from unknown"
4009 " opcode while OFMarker=No, closing iSCSI"
4013 if (iscsit_recover_from_unknown_opcode(conn
) < 0) {
4014 pr_err("Unable to recover from unknown"
4015 " opcode, closing iSCSI connection.\n");
4023 return iscsit_add_reject(conn
, ISCSI_REASON_BOOKMARK_NO_RESOURCES
, buf
);
4026 int iscsi_target_rx_thread(void *arg
)
4029 u8 buffer
[ISCSI_HDR_LEN
], opcode
;
4030 u32 checksum
= 0, digest
= 0;
4031 struct iscsi_conn
*conn
= NULL
;
4032 struct iscsi_thread_set
*ts
= arg
;
4035 * Allow ourselves to be interrupted by SIGINT so that a
4036 * connection recovery / failure event can be triggered externally.
4038 allow_signal(SIGINT
);
4041 conn
= iscsi_rx_thread_pre_handler(ts
);
4045 if (conn
->conn_transport
->transport_type
== ISCSI_INFINIBAND
) {
4046 struct completion comp
;
4049 init_completion(&comp
);
4050 rc
= wait_for_completion_interruptible(&comp
);
4057 while (!kthread_should_stop()) {
4059 * Ensure that both TX and RX per connection kthreads
4060 * are scheduled to run on the same CPU.
4062 iscsit_thread_check_cpumask(conn
, current
, 0);
4064 memset(buffer
, 0, ISCSI_HDR_LEN
);
4065 memset(&iov
, 0, sizeof(struct kvec
));
4067 iov
.iov_base
= buffer
;
4068 iov
.iov_len
= ISCSI_HDR_LEN
;
4070 ret
= rx_data(conn
, &iov
, 1, ISCSI_HDR_LEN
);
4071 if (ret
!= ISCSI_HDR_LEN
) {
4072 iscsit_rx_thread_wait_for_tcp(conn
);
4076 if (conn
->conn_ops
->HeaderDigest
) {
4077 iov
.iov_base
= &digest
;
4078 iov
.iov_len
= ISCSI_CRC_LEN
;
4080 ret
= rx_data(conn
, &iov
, 1, ISCSI_CRC_LEN
);
4081 if (ret
!= ISCSI_CRC_LEN
) {
4082 iscsit_rx_thread_wait_for_tcp(conn
);
4086 iscsit_do_crypto_hash_buf(&conn
->conn_rx_hash
,
4087 buffer
, ISCSI_HDR_LEN
,
4088 0, NULL
, (u8
*)&checksum
);
4090 if (digest
!= checksum
) {
4091 pr_err("HeaderDigest CRC32C failed,"
4092 " received 0x%08x, computed 0x%08x\n",
4095 * Set the PDU to 0xff so it will intentionally
4096 * hit default in the switch below.
4098 memset(buffer
, 0xff, ISCSI_HDR_LEN
);
4099 atomic_long_inc(&conn
->sess
->conn_digest_errors
);
4101 pr_debug("Got HeaderDigest CRC32C"
4102 " 0x%08x\n", checksum
);
4106 if (conn
->conn_state
== TARG_CONN_STATE_IN_LOGOUT
)
4109 opcode
= buffer
[0] & ISCSI_OPCODE_MASK
;
4111 if (conn
->sess
->sess_ops
->SessionType
&&
4112 ((!(opcode
& ISCSI_OP_TEXT
)) ||
4113 (!(opcode
& ISCSI_OP_LOGOUT
)))) {
4114 pr_err("Received illegal iSCSI Opcode: 0x%02x"
4115 " while in Discovery Session, rejecting.\n", opcode
);
4116 iscsit_add_reject(conn
, ISCSI_REASON_PROTOCOL_ERROR
,
4121 ret
= iscsi_target_rx_opcode(conn
, buffer
);
4127 if (!signal_pending(current
))
4128 atomic_set(&conn
->transport_failed
, 1);
4129 iscsit_take_action_for_connection_exit(conn
);
4135 static void iscsit_release_commands_from_conn(struct iscsi_conn
*conn
)
4137 struct iscsi_cmd
*cmd
= NULL
, *cmd_tmp
= NULL
;
4138 struct iscsi_session
*sess
= conn
->sess
;
4140 * We expect this function to only ever be called from either RX or TX
4141 * thread context via iscsit_close_connection() once the other context
4142 * has been reset -> returned sleeping pre-handler state.
4144 spin_lock_bh(&conn
->cmd_lock
);
4145 list_for_each_entry_safe(cmd
, cmd_tmp
, &conn
->conn_cmd_list
, i_conn_node
) {
4147 list_del(&cmd
->i_conn_node
);
4148 spin_unlock_bh(&conn
->cmd_lock
);
4150 iscsit_increment_maxcmdsn(cmd
, sess
);
4152 iscsit_free_cmd(cmd
, true);
4154 spin_lock_bh(&conn
->cmd_lock
);
4156 spin_unlock_bh(&conn
->cmd_lock
);
4159 static void iscsit_stop_timers_for_cmds(
4160 struct iscsi_conn
*conn
)
4162 struct iscsi_cmd
*cmd
;
4164 spin_lock_bh(&conn
->cmd_lock
);
4165 list_for_each_entry(cmd
, &conn
->conn_cmd_list
, i_conn_node
) {
4166 if (cmd
->data_direction
== DMA_TO_DEVICE
)
4167 iscsit_stop_dataout_timer(cmd
);
4169 spin_unlock_bh(&conn
->cmd_lock
);
4172 int iscsit_close_connection(
4173 struct iscsi_conn
*conn
)
4175 int conn_logout
= (conn
->conn_state
== TARG_CONN_STATE_IN_LOGOUT
);
4176 struct iscsi_session
*sess
= conn
->sess
;
4178 pr_debug("Closing iSCSI connection CID %hu on SID:"
4179 " %u\n", conn
->cid
, sess
->sid
);
4181 * Always up conn_logout_comp just in case the RX Thread is sleeping
4182 * and the logout response never got sent because the connection
4185 complete(&conn
->conn_logout_comp
);
4187 iscsi_release_thread_set(conn
);
4189 iscsit_stop_timers_for_cmds(conn
);
4190 iscsit_stop_nopin_response_timer(conn
);
4191 iscsit_stop_nopin_timer(conn
);
4192 iscsit_free_queue_reqs_for_conn(conn
);
4195 * During Connection recovery drop unacknowledged out of order
4196 * commands for this connection, and prepare the other commands
4199 * During normal operation clear the out of order commands (but
4200 * do not free the struct iscsi_ooo_cmdsn's) and release all
4201 * struct iscsi_cmds.
4203 if (atomic_read(&conn
->connection_recovery
)) {
4204 iscsit_discard_unacknowledged_ooo_cmdsns_for_conn(conn
);
4205 iscsit_prepare_cmds_for_realligance(conn
);
4207 iscsit_clear_ooo_cmdsns_for_conn(conn
);
4208 iscsit_release_commands_from_conn(conn
);
4212 * Handle decrementing session or connection usage count if
4213 * a logout response was not able to be sent because the
4214 * connection failed. Fall back to Session Recovery here.
4216 if (atomic_read(&conn
->conn_logout_remove
)) {
4217 if (conn
->conn_logout_reason
== ISCSI_LOGOUT_REASON_CLOSE_SESSION
) {
4218 iscsit_dec_conn_usage_count(conn
);
4219 iscsit_dec_session_usage_count(sess
);
4221 if (conn
->conn_logout_reason
== ISCSI_LOGOUT_REASON_CLOSE_CONNECTION
)
4222 iscsit_dec_conn_usage_count(conn
);
4224 atomic_set(&conn
->conn_logout_remove
, 0);
4225 atomic_set(&sess
->session_reinstatement
, 0);
4226 atomic_set(&sess
->session_fall_back_to_erl0
, 1);
4229 spin_lock_bh(&sess
->conn_lock
);
4230 list_del(&conn
->conn_list
);
4233 * Attempt to let the Initiator know this connection failed by
4234 * sending an Connection Dropped Async Message on another
4235 * active connection.
4237 if (atomic_read(&conn
->connection_recovery
))
4238 iscsit_build_conn_drop_async_message(conn
);
4240 spin_unlock_bh(&sess
->conn_lock
);
4243 * If connection reinstatement is being performed on this connection,
4244 * up the connection reinstatement semaphore that is being blocked on
4245 * in iscsit_cause_connection_reinstatement().
4247 spin_lock_bh(&conn
->state_lock
);
4248 if (atomic_read(&conn
->sleep_on_conn_wait_comp
)) {
4249 spin_unlock_bh(&conn
->state_lock
);
4250 complete(&conn
->conn_wait_comp
);
4251 wait_for_completion(&conn
->conn_post_wait_comp
);
4252 spin_lock_bh(&conn
->state_lock
);
4256 * If connection reinstatement is being performed on this connection
4257 * by receiving a REMOVECONNFORRECOVERY logout request, up the
4258 * connection wait rcfr semaphore that is being blocked on
4259 * an iscsit_connection_reinstatement_rcfr().
4261 if (atomic_read(&conn
->connection_wait_rcfr
)) {
4262 spin_unlock_bh(&conn
->state_lock
);
4263 complete(&conn
->conn_wait_rcfr_comp
);
4264 wait_for_completion(&conn
->conn_post_wait_comp
);
4265 spin_lock_bh(&conn
->state_lock
);
4267 atomic_set(&conn
->connection_reinstatement
, 1);
4268 spin_unlock_bh(&conn
->state_lock
);
4271 * If any other processes are accessing this connection pointer we
4272 * must wait until they have completed.
4274 iscsit_check_conn_usage_count(conn
);
4276 if (conn
->conn_rx_hash
.tfm
)
4277 crypto_free_hash(conn
->conn_rx_hash
.tfm
);
4278 if (conn
->conn_tx_hash
.tfm
)
4279 crypto_free_hash(conn
->conn_tx_hash
.tfm
);
4281 if (conn
->conn_cpumask
)
4282 free_cpumask_var(conn
->conn_cpumask
);
4284 kfree(conn
->conn_ops
);
4285 conn
->conn_ops
= NULL
;
4288 sock_release(conn
->sock
);
4290 if (conn
->conn_transport
->iscsit_free_conn
)
4291 conn
->conn_transport
->iscsit_free_conn(conn
);
4293 iscsit_put_transport(conn
->conn_transport
);
4295 conn
->thread_set
= NULL
;
4297 pr_debug("Moving to TARG_CONN_STATE_FREE.\n");
4298 conn
->conn_state
= TARG_CONN_STATE_FREE
;
4301 spin_lock_bh(&sess
->conn_lock
);
4302 atomic_dec(&sess
->nconn
);
4303 pr_debug("Decremented iSCSI connection count to %hu from node:"
4304 " %s\n", atomic_read(&sess
->nconn
),
4305 sess
->sess_ops
->InitiatorName
);
4307 * Make sure that if one connection fails in an non ERL=2 iSCSI
4308 * Session that they all fail.
4310 if ((sess
->sess_ops
->ErrorRecoveryLevel
!= 2) && !conn_logout
&&
4311 !atomic_read(&sess
->session_logout
))
4312 atomic_set(&sess
->session_fall_back_to_erl0
, 1);
4315 * If this was not the last connection in the session, and we are
4316 * performing session reinstatement or falling back to ERL=0, call
4317 * iscsit_stop_session() without sleeping to shutdown the other
4318 * active connections.
4320 if (atomic_read(&sess
->nconn
)) {
4321 if (!atomic_read(&sess
->session_reinstatement
) &&
4322 !atomic_read(&sess
->session_fall_back_to_erl0
)) {
4323 spin_unlock_bh(&sess
->conn_lock
);
4326 if (!atomic_read(&sess
->session_stop_active
)) {
4327 atomic_set(&sess
->session_stop_active
, 1);
4328 spin_unlock_bh(&sess
->conn_lock
);
4329 iscsit_stop_session(sess
, 0, 0);
4332 spin_unlock_bh(&sess
->conn_lock
);
4337 * If this was the last connection in the session and one of the
4338 * following is occurring:
4340 * Session Reinstatement is not being performed, and are falling back
4341 * to ERL=0 call iscsit_close_session().
4343 * Session Logout was requested. iscsit_close_session() will be called
4346 * Session Continuation is not being performed, start the Time2Retain
4347 * handler and check if sleep_on_sess_wait_sem is active.
4349 if (!atomic_read(&sess
->session_reinstatement
) &&
4350 atomic_read(&sess
->session_fall_back_to_erl0
)) {
4351 spin_unlock_bh(&sess
->conn_lock
);
4352 target_put_session(sess
->se_sess
);
4355 } else if (atomic_read(&sess
->session_logout
)) {
4356 pr_debug("Moving to TARG_SESS_STATE_FREE.\n");
4357 sess
->session_state
= TARG_SESS_STATE_FREE
;
4358 spin_unlock_bh(&sess
->conn_lock
);
4360 if (atomic_read(&sess
->sleep_on_sess_wait_comp
))
4361 complete(&sess
->session_wait_comp
);
4365 pr_debug("Moving to TARG_SESS_STATE_FAILED.\n");
4366 sess
->session_state
= TARG_SESS_STATE_FAILED
;
4368 if (!atomic_read(&sess
->session_continuation
)) {
4369 spin_unlock_bh(&sess
->conn_lock
);
4370 iscsit_start_time2retain_handler(sess
);
4372 spin_unlock_bh(&sess
->conn_lock
);
4374 if (atomic_read(&sess
->sleep_on_sess_wait_comp
))
4375 complete(&sess
->session_wait_comp
);
4379 spin_unlock_bh(&sess
->conn_lock
);
4384 int iscsit_close_session(struct iscsi_session
*sess
)
4386 struct iscsi_portal_group
*tpg
= sess
->tpg
;
4387 struct se_portal_group
*se_tpg
= &tpg
->tpg_se_tpg
;
4389 if (atomic_read(&sess
->nconn
)) {
4390 pr_err("%d connection(s) still exist for iSCSI session"
4391 " to %s\n", atomic_read(&sess
->nconn
),
4392 sess
->sess_ops
->InitiatorName
);
4396 spin_lock_bh(&se_tpg
->session_lock
);
4397 atomic_set(&sess
->session_logout
, 1);
4398 atomic_set(&sess
->session_reinstatement
, 1);
4399 iscsit_stop_time2retain_timer(sess
);
4400 spin_unlock_bh(&se_tpg
->session_lock
);
4403 * transport_deregister_session_configfs() will clear the
4404 * struct se_node_acl->nacl_sess pointer now as a iscsi_np process context
4405 * can be setting it again with __transport_register_session() in
4406 * iscsi_post_login_handler() again after the iscsit_stop_session()
4407 * completes in iscsi_np context.
4409 transport_deregister_session_configfs(sess
->se_sess
);
4412 * If any other processes are accessing this session pointer we must
4413 * wait until they have completed. If we are in an interrupt (the
4414 * time2retain handler) and contain and active session usage count we
4415 * restart the timer and exit.
4417 if (!in_interrupt()) {
4418 if (iscsit_check_session_usage_count(sess
) == 1)
4419 iscsit_stop_session(sess
, 1, 1);
4421 if (iscsit_check_session_usage_count(sess
) == 2) {
4422 atomic_set(&sess
->session_logout
, 0);
4423 iscsit_start_time2retain_handler(sess
);
4428 transport_deregister_session(sess
->se_sess
);
4430 if (sess
->sess_ops
->ErrorRecoveryLevel
== 2)
4431 iscsit_free_connection_recovery_entires(sess
);
4433 iscsit_free_all_ooo_cmdsns(sess
);
4435 spin_lock_bh(&se_tpg
->session_lock
);
4436 pr_debug("Moving to TARG_SESS_STATE_FREE.\n");
4437 sess
->session_state
= TARG_SESS_STATE_FREE
;
4438 pr_debug("Released iSCSI session from node: %s\n",
4439 sess
->sess_ops
->InitiatorName
);
4442 tpg
->tpg_tiqn
->tiqn_nsessions
--;
4444 pr_debug("Decremented number of active iSCSI Sessions on"
4445 " iSCSI TPG: %hu to %u\n", tpg
->tpgt
, tpg
->nsessions
);
4447 spin_lock(&sess_idr_lock
);
4448 idr_remove(&sess_idr
, sess
->session_index
);
4449 spin_unlock(&sess_idr_lock
);
4451 kfree(sess
->sess_ops
);
4452 sess
->sess_ops
= NULL
;
4453 spin_unlock_bh(&se_tpg
->session_lock
);
4459 static void iscsit_logout_post_handler_closesession(
4460 struct iscsi_conn
*conn
)
4462 struct iscsi_session
*sess
= conn
->sess
;
4464 iscsi_set_thread_clear(conn
, ISCSI_CLEAR_TX_THREAD
);
4465 iscsi_set_thread_set_signal(conn
, ISCSI_SIGNAL_TX_THREAD
);
4467 atomic_set(&conn
->conn_logout_remove
, 0);
4468 complete(&conn
->conn_logout_comp
);
4470 iscsit_dec_conn_usage_count(conn
);
4471 iscsit_stop_session(sess
, 1, 1);
4472 iscsit_dec_session_usage_count(sess
);
4473 target_put_session(sess
->se_sess
);
4476 static void iscsit_logout_post_handler_samecid(
4477 struct iscsi_conn
*conn
)
4479 iscsi_set_thread_clear(conn
, ISCSI_CLEAR_TX_THREAD
);
4480 iscsi_set_thread_set_signal(conn
, ISCSI_SIGNAL_TX_THREAD
);
4482 atomic_set(&conn
->conn_logout_remove
, 0);
4483 complete(&conn
->conn_logout_comp
);
4485 iscsit_cause_connection_reinstatement(conn
, 1);
4486 iscsit_dec_conn_usage_count(conn
);
4489 static void iscsit_logout_post_handler_diffcid(
4490 struct iscsi_conn
*conn
,
4493 struct iscsi_conn
*l_conn
;
4494 struct iscsi_session
*sess
= conn
->sess
;
4499 spin_lock_bh(&sess
->conn_lock
);
4500 list_for_each_entry(l_conn
, &sess
->sess_conn_list
, conn_list
) {
4501 if (l_conn
->cid
== cid
) {
4502 iscsit_inc_conn_usage_count(l_conn
);
4506 spin_unlock_bh(&sess
->conn_lock
);
4512 l_conn
->sock
->ops
->shutdown(l_conn
->sock
, RCV_SHUTDOWN
);
4514 spin_lock_bh(&l_conn
->state_lock
);
4515 pr_debug("Moving to TARG_CONN_STATE_IN_LOGOUT.\n");
4516 l_conn
->conn_state
= TARG_CONN_STATE_IN_LOGOUT
;
4517 spin_unlock_bh(&l_conn
->state_lock
);
4519 iscsit_cause_connection_reinstatement(l_conn
, 1);
4520 iscsit_dec_conn_usage_count(l_conn
);
4524 * Return of 0 causes the TX thread to restart.
4526 int iscsit_logout_post_handler(
4527 struct iscsi_cmd
*cmd
,
4528 struct iscsi_conn
*conn
)
4532 switch (cmd
->logout_reason
) {
4533 case ISCSI_LOGOUT_REASON_CLOSE_SESSION
:
4534 switch (cmd
->logout_response
) {
4535 case ISCSI_LOGOUT_SUCCESS
:
4536 case ISCSI_LOGOUT_CLEANUP_FAILED
:
4538 iscsit_logout_post_handler_closesession(conn
);
4543 case ISCSI_LOGOUT_REASON_CLOSE_CONNECTION
:
4544 if (conn
->cid
== cmd
->logout_cid
) {
4545 switch (cmd
->logout_response
) {
4546 case ISCSI_LOGOUT_SUCCESS
:
4547 case ISCSI_LOGOUT_CLEANUP_FAILED
:
4549 iscsit_logout_post_handler_samecid(conn
);
4554 switch (cmd
->logout_response
) {
4555 case ISCSI_LOGOUT_SUCCESS
:
4556 iscsit_logout_post_handler_diffcid(conn
,
4559 case ISCSI_LOGOUT_CID_NOT_FOUND
:
4560 case ISCSI_LOGOUT_CLEANUP_FAILED
:
4567 case ISCSI_LOGOUT_REASON_RECOVERY
:
4568 switch (cmd
->logout_response
) {
4569 case ISCSI_LOGOUT_SUCCESS
:
4570 case ISCSI_LOGOUT_CID_NOT_FOUND
:
4571 case ISCSI_LOGOUT_RECOVERY_UNSUPPORTED
:
4572 case ISCSI_LOGOUT_CLEANUP_FAILED
:
4584 EXPORT_SYMBOL(iscsit_logout_post_handler
);
4586 void iscsit_fail_session(struct iscsi_session
*sess
)
4588 struct iscsi_conn
*conn
;
4590 spin_lock_bh(&sess
->conn_lock
);
4591 list_for_each_entry(conn
, &sess
->sess_conn_list
, conn_list
) {
4592 pr_debug("Moving to TARG_CONN_STATE_CLEANUP_WAIT.\n");
4593 conn
->conn_state
= TARG_CONN_STATE_CLEANUP_WAIT
;
4595 spin_unlock_bh(&sess
->conn_lock
);
4597 pr_debug("Moving to TARG_SESS_STATE_FAILED.\n");
4598 sess
->session_state
= TARG_SESS_STATE_FAILED
;
4601 int iscsit_free_session(struct iscsi_session
*sess
)
4603 u16 conn_count
= atomic_read(&sess
->nconn
);
4604 struct iscsi_conn
*conn
, *conn_tmp
= NULL
;
4607 spin_lock_bh(&sess
->conn_lock
);
4608 atomic_set(&sess
->sleep_on_sess_wait_comp
, 1);
4610 list_for_each_entry_safe(conn
, conn_tmp
, &sess
->sess_conn_list
,
4612 if (conn_count
== 0)
4615 if (list_is_last(&conn
->conn_list
, &sess
->sess_conn_list
)) {
4618 iscsit_inc_conn_usage_count(conn_tmp
);
4621 iscsit_inc_conn_usage_count(conn
);
4623 spin_unlock_bh(&sess
->conn_lock
);
4624 iscsit_cause_connection_reinstatement(conn
, 1);
4625 spin_lock_bh(&sess
->conn_lock
);
4627 iscsit_dec_conn_usage_count(conn
);
4629 iscsit_dec_conn_usage_count(conn_tmp
);
4634 if (atomic_read(&sess
->nconn
)) {
4635 spin_unlock_bh(&sess
->conn_lock
);
4636 wait_for_completion(&sess
->session_wait_comp
);
4638 spin_unlock_bh(&sess
->conn_lock
);
4640 target_put_session(sess
->se_sess
);
4644 void iscsit_stop_session(
4645 struct iscsi_session
*sess
,
4647 int connection_sleep
)
4649 u16 conn_count
= atomic_read(&sess
->nconn
);
4650 struct iscsi_conn
*conn
, *conn_tmp
= NULL
;
4653 spin_lock_bh(&sess
->conn_lock
);
4655 atomic_set(&sess
->sleep_on_sess_wait_comp
, 1);
4657 if (connection_sleep
) {
4658 list_for_each_entry_safe(conn
, conn_tmp
, &sess
->sess_conn_list
,
4660 if (conn_count
== 0)
4663 if (list_is_last(&conn
->conn_list
, &sess
->sess_conn_list
)) {
4666 iscsit_inc_conn_usage_count(conn_tmp
);
4669 iscsit_inc_conn_usage_count(conn
);
4671 spin_unlock_bh(&sess
->conn_lock
);
4672 iscsit_cause_connection_reinstatement(conn
, 1);
4673 spin_lock_bh(&sess
->conn_lock
);
4675 iscsit_dec_conn_usage_count(conn
);
4677 iscsit_dec_conn_usage_count(conn_tmp
);
4681 list_for_each_entry(conn
, &sess
->sess_conn_list
, conn_list
)
4682 iscsit_cause_connection_reinstatement(conn
, 0);
4685 if (session_sleep
&& atomic_read(&sess
->nconn
)) {
4686 spin_unlock_bh(&sess
->conn_lock
);
4687 wait_for_completion(&sess
->session_wait_comp
);
4689 spin_unlock_bh(&sess
->conn_lock
);
4692 int iscsit_release_sessions_for_tpg(struct iscsi_portal_group
*tpg
, int force
)
4694 struct iscsi_session
*sess
;
4695 struct se_portal_group
*se_tpg
= &tpg
->tpg_se_tpg
;
4696 struct se_session
*se_sess
, *se_sess_tmp
;
4697 int session_count
= 0;
4699 spin_lock_bh(&se_tpg
->session_lock
);
4700 if (tpg
->nsessions
&& !force
) {
4701 spin_unlock_bh(&se_tpg
->session_lock
);
4705 list_for_each_entry_safe(se_sess
, se_sess_tmp
, &se_tpg
->tpg_sess_list
,
4707 sess
= (struct iscsi_session
*)se_sess
->fabric_sess_ptr
;
4709 spin_lock(&sess
->conn_lock
);
4710 if (atomic_read(&sess
->session_fall_back_to_erl0
) ||
4711 atomic_read(&sess
->session_logout
) ||
4712 (sess
->time2retain_timer_flags
& ISCSI_TF_EXPIRED
)) {
4713 spin_unlock(&sess
->conn_lock
);
4716 atomic_set(&sess
->session_reinstatement
, 1);
4717 spin_unlock(&sess
->conn_lock
);
4718 spin_unlock_bh(&se_tpg
->session_lock
);
4720 iscsit_free_session(sess
);
4721 spin_lock_bh(&se_tpg
->session_lock
);
4725 spin_unlock_bh(&se_tpg
->session_lock
);
4727 pr_debug("Released %d iSCSI Session(s) from Target Portal"
4728 " Group: %hu\n", session_count
, tpg
->tpgt
);
4732 MODULE_DESCRIPTION("iSCSI-Target Driver for mainline target infrastructure");
4733 MODULE_VERSION("4.1.x");
4734 MODULE_AUTHOR("nab@Linux-iSCSI.org");
4735 MODULE_LICENSE("GPL");
4737 module_init(iscsi_target_init_module
);
4738 module_exit(iscsi_target_cleanup_module
);