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
)
756 struct iscsi_cmd
*cmd
;
758 conn
->exp_statsn
= exp_statsn
;
760 if (conn
->sess
->sess_ops
->RDMAExtensions
)
763 spin_lock_bh(&conn
->cmd_lock
);
764 list_for_each_entry(cmd
, &conn
->conn_cmd_list
, i_conn_node
) {
765 spin_lock(&cmd
->istate_lock
);
766 if ((cmd
->i_state
== ISTATE_SENT_STATUS
) &&
767 iscsi_sna_lt(cmd
->stat_sn
, exp_statsn
)) {
768 cmd
->i_state
= ISTATE_REMOVE
;
769 spin_unlock(&cmd
->istate_lock
);
770 iscsit_add_cmd_to_immediate_queue(cmd
, conn
,
774 spin_unlock(&cmd
->istate_lock
);
776 spin_unlock_bh(&conn
->cmd_lock
);
779 static int iscsit_allocate_iovecs(struct iscsi_cmd
*cmd
)
781 u32 iov_count
= max(1UL, DIV_ROUND_UP(cmd
->se_cmd
.data_length
, PAGE_SIZE
));
783 iov_count
+= ISCSI_IOV_DATA_BUFFER
;
785 cmd
->iov_data
= kzalloc(iov_count
* sizeof(struct kvec
), GFP_KERNEL
);
786 if (!cmd
->iov_data
) {
787 pr_err("Unable to allocate cmd->iov_data\n");
791 cmd
->orig_iov_data_count
= iov_count
;
795 int iscsit_setup_scsi_cmd(struct iscsi_conn
*conn
, struct iscsi_cmd
*cmd
,
798 int data_direction
, payload_length
;
799 struct iscsi_scsi_req
*hdr
;
803 spin_lock_bh(&conn
->sess
->session_stats_lock
);
804 conn
->sess
->cmd_pdus
++;
805 if (conn
->sess
->se_sess
->se_node_acl
) {
806 spin_lock(&conn
->sess
->se_sess
->se_node_acl
->stats_lock
);
807 conn
->sess
->se_sess
->se_node_acl
->num_cmds
++;
808 spin_unlock(&conn
->sess
->se_sess
->se_node_acl
->stats_lock
);
810 spin_unlock_bh(&conn
->sess
->session_stats_lock
);
812 hdr
= (struct iscsi_scsi_req
*) buf
;
813 payload_length
= ntoh24(hdr
->dlength
);
815 /* FIXME; Add checks for AdditionalHeaderSegment */
817 if (!(hdr
->flags
& ISCSI_FLAG_CMD_WRITE
) &&
818 !(hdr
->flags
& ISCSI_FLAG_CMD_FINAL
)) {
819 pr_err("ISCSI_FLAG_CMD_WRITE & ISCSI_FLAG_CMD_FINAL"
820 " not set. Bad iSCSI Initiator.\n");
821 return iscsit_add_reject_cmd(cmd
,
822 ISCSI_REASON_BOOKMARK_INVALID
, buf
);
825 if (((hdr
->flags
& ISCSI_FLAG_CMD_READ
) ||
826 (hdr
->flags
& ISCSI_FLAG_CMD_WRITE
)) && !hdr
->data_length
) {
828 * Vmware ESX v3.0 uses a modified Cisco Initiator (v3.4.2)
829 * that adds support for RESERVE/RELEASE. There is a bug
830 * add with this new functionality that sets R/W bits when
831 * neither CDB carries any READ or WRITE datapayloads.
833 if ((hdr
->cdb
[0] == 0x16) || (hdr
->cdb
[0] == 0x17)) {
834 hdr
->flags
&= ~ISCSI_FLAG_CMD_READ
;
835 hdr
->flags
&= ~ISCSI_FLAG_CMD_WRITE
;
839 pr_err("ISCSI_FLAG_CMD_READ or ISCSI_FLAG_CMD_WRITE"
840 " set when Expected Data Transfer Length is 0 for"
841 " CDB: 0x%02x. Bad iSCSI Initiator.\n", hdr
->cdb
[0]);
842 return iscsit_add_reject_cmd(cmd
,
843 ISCSI_REASON_BOOKMARK_INVALID
, buf
);
847 if (!(hdr
->flags
& ISCSI_FLAG_CMD_READ
) &&
848 !(hdr
->flags
& ISCSI_FLAG_CMD_WRITE
) && (hdr
->data_length
!= 0)) {
849 pr_err("ISCSI_FLAG_CMD_READ and/or ISCSI_FLAG_CMD_WRITE"
850 " MUST be set if Expected Data Transfer Length is not 0."
851 " Bad iSCSI Initiator\n");
852 return iscsit_add_reject_cmd(cmd
,
853 ISCSI_REASON_BOOKMARK_INVALID
, buf
);
856 if ((hdr
->flags
& ISCSI_FLAG_CMD_READ
) &&
857 (hdr
->flags
& ISCSI_FLAG_CMD_WRITE
)) {
858 pr_err("Bidirectional operations not supported!\n");
859 return iscsit_add_reject_cmd(cmd
,
860 ISCSI_REASON_BOOKMARK_INVALID
, buf
);
863 if (hdr
->opcode
& ISCSI_OP_IMMEDIATE
) {
864 pr_err("Illegally set Immediate Bit in iSCSI Initiator"
865 " Scsi Command PDU.\n");
866 return iscsit_add_reject_cmd(cmd
,
867 ISCSI_REASON_BOOKMARK_INVALID
, buf
);
870 if (payload_length
&& !conn
->sess
->sess_ops
->ImmediateData
) {
871 pr_err("ImmediateData=No but DataSegmentLength=%u,"
872 " protocol error.\n", payload_length
);
873 return iscsit_add_reject_cmd(cmd
,
874 ISCSI_REASON_PROTOCOL_ERROR
, buf
);
877 if ((be32_to_cpu(hdr
->data_length
) == payload_length
) &&
878 (!(hdr
->flags
& ISCSI_FLAG_CMD_FINAL
))) {
879 pr_err("Expected Data Transfer Length and Length of"
880 " Immediate Data are the same, but ISCSI_FLAG_CMD_FINAL"
881 " bit is not set protocol error\n");
882 return iscsit_add_reject_cmd(cmd
,
883 ISCSI_REASON_PROTOCOL_ERROR
, buf
);
886 if (payload_length
> be32_to_cpu(hdr
->data_length
)) {
887 pr_err("DataSegmentLength: %u is greater than"
888 " EDTL: %u, protocol error.\n", payload_length
,
890 return iscsit_add_reject_cmd(cmd
,
891 ISCSI_REASON_PROTOCOL_ERROR
, buf
);
894 if (payload_length
> conn
->conn_ops
->MaxXmitDataSegmentLength
) {
895 pr_err("DataSegmentLength: %u is greater than"
896 " MaxXmitDataSegmentLength: %u, protocol error.\n",
897 payload_length
, conn
->conn_ops
->MaxXmitDataSegmentLength
);
898 return iscsit_add_reject_cmd(cmd
,
899 ISCSI_REASON_PROTOCOL_ERROR
, buf
);
902 if (payload_length
> conn
->sess
->sess_ops
->FirstBurstLength
) {
903 pr_err("DataSegmentLength: %u is greater than"
904 " FirstBurstLength: %u, protocol error.\n",
905 payload_length
, conn
->sess
->sess_ops
->FirstBurstLength
);
906 return iscsit_add_reject_cmd(cmd
,
907 ISCSI_REASON_BOOKMARK_INVALID
, buf
);
910 data_direction
= (hdr
->flags
& ISCSI_FLAG_CMD_WRITE
) ? DMA_TO_DEVICE
:
911 (hdr
->flags
& ISCSI_FLAG_CMD_READ
) ? DMA_FROM_DEVICE
:
914 cmd
->data_direction
= data_direction
;
915 iscsi_task_attr
= hdr
->flags
& ISCSI_FLAG_CMD_ATTR_MASK
;
917 * Figure out the SAM Task Attribute for the incoming SCSI CDB
919 if ((iscsi_task_attr
== ISCSI_ATTR_UNTAGGED
) ||
920 (iscsi_task_attr
== ISCSI_ATTR_SIMPLE
))
921 sam_task_attr
= MSG_SIMPLE_TAG
;
922 else if (iscsi_task_attr
== ISCSI_ATTR_ORDERED
)
923 sam_task_attr
= MSG_ORDERED_TAG
;
924 else if (iscsi_task_attr
== ISCSI_ATTR_HEAD_OF_QUEUE
)
925 sam_task_attr
= MSG_HEAD_TAG
;
926 else if (iscsi_task_attr
== ISCSI_ATTR_ACA
)
927 sam_task_attr
= MSG_ACA_TAG
;
929 pr_debug("Unknown iSCSI Task Attribute: 0x%02x, using"
930 " MSG_SIMPLE_TAG\n", iscsi_task_attr
);
931 sam_task_attr
= MSG_SIMPLE_TAG
;
934 cmd
->iscsi_opcode
= ISCSI_OP_SCSI_CMD
;
935 cmd
->i_state
= ISTATE_NEW_CMD
;
936 cmd
->immediate_cmd
= ((hdr
->opcode
& ISCSI_OP_IMMEDIATE
) ? 1 : 0);
937 cmd
->immediate_data
= (payload_length
) ? 1 : 0;
938 cmd
->unsolicited_data
= ((!(hdr
->flags
& ISCSI_FLAG_CMD_FINAL
) &&
939 (hdr
->flags
& ISCSI_FLAG_CMD_WRITE
)) ? 1 : 0);
940 if (cmd
->unsolicited_data
)
941 cmd
->cmd_flags
|= ICF_NON_IMMEDIATE_UNSOLICITED_DATA
;
943 conn
->sess
->init_task_tag
= cmd
->init_task_tag
= hdr
->itt
;
944 if (hdr
->flags
& ISCSI_FLAG_CMD_READ
) {
945 spin_lock_bh(&conn
->sess
->ttt_lock
);
946 cmd
->targ_xfer_tag
= conn
->sess
->targ_xfer_tag
++;
947 if (cmd
->targ_xfer_tag
== 0xFFFFFFFF)
948 cmd
->targ_xfer_tag
= conn
->sess
->targ_xfer_tag
++;
949 spin_unlock_bh(&conn
->sess
->ttt_lock
);
950 } else if (hdr
->flags
& ISCSI_FLAG_CMD_WRITE
)
951 cmd
->targ_xfer_tag
= 0xFFFFFFFF;
952 cmd
->cmd_sn
= be32_to_cpu(hdr
->cmdsn
);
953 cmd
->exp_stat_sn
= be32_to_cpu(hdr
->exp_statsn
);
954 cmd
->first_burst_len
= payload_length
;
956 if (!conn
->sess
->sess_ops
->RDMAExtensions
&&
957 cmd
->data_direction
== DMA_FROM_DEVICE
) {
958 struct iscsi_datain_req
*dr
;
960 dr
= iscsit_allocate_datain_req();
962 return iscsit_add_reject_cmd(cmd
,
963 ISCSI_REASON_BOOKMARK_NO_RESOURCES
, buf
);
965 iscsit_attach_datain_req(cmd
, dr
);
969 * Initialize struct se_cmd descriptor from target_core_mod infrastructure
971 transport_init_se_cmd(&cmd
->se_cmd
, &lio_target_fabric_configfs
->tf_ops
,
972 conn
->sess
->se_sess
, be32_to_cpu(hdr
->data_length
),
973 cmd
->data_direction
, sam_task_attr
,
974 cmd
->sense_buffer
+ 2);
976 pr_debug("Got SCSI Command, ITT: 0x%08x, CmdSN: 0x%08x,"
977 " ExpXferLen: %u, Length: %u, CID: %hu\n", hdr
->itt
,
978 hdr
->cmdsn
, be32_to_cpu(hdr
->data_length
), payload_length
,
981 target_get_sess_cmd(conn
->sess
->se_sess
, &cmd
->se_cmd
, true);
983 cmd
->sense_reason
= transport_lookup_cmd_lun(&cmd
->se_cmd
,
984 scsilun_to_int(&hdr
->lun
));
985 if (cmd
->sense_reason
)
988 cmd
->sense_reason
= target_setup_cmd_from_cdb(&cmd
->se_cmd
, hdr
->cdb
);
989 if (cmd
->sense_reason
) {
990 if (cmd
->sense_reason
== TCM_OUT_OF_RESOURCES
) {
991 return iscsit_add_reject_cmd(cmd
,
992 ISCSI_REASON_BOOKMARK_NO_RESOURCES
, buf
);
998 if (iscsit_build_pdu_and_seq_lists(cmd
, payload_length
) < 0) {
999 return iscsit_add_reject_cmd(cmd
,
1000 ISCSI_REASON_BOOKMARK_NO_RESOURCES
, buf
);
1004 spin_lock_bh(&conn
->cmd_lock
);
1005 list_add_tail(&cmd
->i_conn_node
, &conn
->conn_cmd_list
);
1006 spin_unlock_bh(&conn
->cmd_lock
);
1008 * Check if we need to delay processing because of ALUA
1009 * Active/NonOptimized primary access state..
1011 core_alua_check_nonop_delay(&cmd
->se_cmd
);
1015 EXPORT_SYMBOL(iscsit_setup_scsi_cmd
);
1017 void iscsit_set_unsoliticed_dataout(struct iscsi_cmd
*cmd
)
1019 iscsit_set_dataout_sequence_values(cmd
);
1021 spin_lock_bh(&cmd
->dataout_timeout_lock
);
1022 iscsit_start_dataout_timer(cmd
, cmd
->conn
);
1023 spin_unlock_bh(&cmd
->dataout_timeout_lock
);
1025 EXPORT_SYMBOL(iscsit_set_unsoliticed_dataout
);
1027 int iscsit_process_scsi_cmd(struct iscsi_conn
*conn
, struct iscsi_cmd
*cmd
,
1028 struct iscsi_scsi_req
*hdr
)
1032 * Check the CmdSN against ExpCmdSN/MaxCmdSN here if
1033 * the Immediate Bit is not set, and no Immediate
1036 * A PDU/CmdSN carrying Immediate Data can only
1037 * be processed after the DataCRC has passed.
1038 * If the DataCRC fails, the CmdSN MUST NOT
1039 * be acknowledged. (See below)
1041 if (!cmd
->immediate_data
) {
1042 cmdsn_ret
= iscsit_sequence_cmd(conn
, cmd
,
1043 (unsigned char *)hdr
, hdr
->cmdsn
);
1044 if (cmdsn_ret
== CMDSN_ERROR_CANNOT_RECOVER
)
1046 else if (cmdsn_ret
== CMDSN_LOWER_THAN_EXP
) {
1047 target_put_sess_cmd(conn
->sess
->se_sess
, &cmd
->se_cmd
);
1052 iscsit_ack_from_expstatsn(conn
, be32_to_cpu(hdr
->exp_statsn
));
1055 * If no Immediate Data is attached, it's OK to return now.
1057 if (!cmd
->immediate_data
) {
1058 if (!cmd
->sense_reason
&& cmd
->unsolicited_data
)
1059 iscsit_set_unsoliticed_dataout(cmd
);
1060 if (!cmd
->sense_reason
)
1063 target_put_sess_cmd(conn
->sess
->se_sess
, &cmd
->se_cmd
);
1068 * Early CHECK_CONDITIONs with ImmediateData never make it to command
1069 * execution. These exceptions are processed in CmdSN order using
1070 * iscsit_check_received_cmdsn() in iscsit_get_immediate_data() below.
1072 if (cmd
->sense_reason
) {
1073 if (cmd
->reject_reason
)
1079 * Call directly into transport_generic_new_cmd() to perform
1080 * the backend memory allocation.
1082 cmd
->sense_reason
= transport_generic_new_cmd(&cmd
->se_cmd
);
1083 if (cmd
->sense_reason
)
1088 EXPORT_SYMBOL(iscsit_process_scsi_cmd
);
1091 iscsit_get_immediate_data(struct iscsi_cmd
*cmd
, struct iscsi_scsi_req
*hdr
,
1094 struct iscsi_conn
*conn
= cmd
->conn
;
1095 int cmdsn_ret
= 0, immed_ret
= IMMEDIATE_DATA_NORMAL_OPERATION
;
1097 * Special case for Unsupported SAM WRITE Opcodes and ImmediateData=Yes.
1099 if (dump_payload
== true)
1100 goto after_immediate_data
;
1102 immed_ret
= iscsit_handle_immediate_data(cmd
, hdr
,
1103 cmd
->first_burst_len
);
1104 after_immediate_data
:
1105 if (immed_ret
== IMMEDIATE_DATA_NORMAL_OPERATION
) {
1107 * A PDU/CmdSN carrying Immediate Data passed
1108 * DataCRC, check against ExpCmdSN/MaxCmdSN if
1109 * Immediate Bit is not set.
1111 cmdsn_ret
= iscsit_sequence_cmd(cmd
->conn
, cmd
,
1112 (unsigned char *)hdr
, hdr
->cmdsn
);
1113 if (cmdsn_ret
== CMDSN_ERROR_CANNOT_RECOVER
)
1116 if (cmd
->sense_reason
|| cmdsn_ret
== CMDSN_LOWER_THAN_EXP
) {
1119 rc
= iscsit_dump_data_payload(cmd
->conn
,
1120 cmd
->first_burst_len
, 1);
1121 target_put_sess_cmd(conn
->sess
->se_sess
, &cmd
->se_cmd
);
1123 } else if (cmd
->unsolicited_data
)
1124 iscsit_set_unsoliticed_dataout(cmd
);
1126 } else if (immed_ret
== IMMEDIATE_DATA_ERL1_CRC_FAILURE
) {
1128 * Immediate Data failed DataCRC and ERL>=1,
1129 * silently drop this PDU and let the initiator
1130 * plug the CmdSN gap.
1132 * FIXME: Send Unsolicited NOPIN with reserved
1133 * TTT here to help the initiator figure out
1134 * the missing CmdSN, although they should be
1135 * intelligent enough to determine the missing
1136 * CmdSN and issue a retry to plug the sequence.
1138 cmd
->i_state
= ISTATE_REMOVE
;
1139 iscsit_add_cmd_to_immediate_queue(cmd
, cmd
->conn
, cmd
->i_state
);
1140 } else /* immed_ret == IMMEDIATE_DATA_CANNOT_RECOVER */
1147 iscsit_handle_scsi_cmd(struct iscsi_conn
*conn
, struct iscsi_cmd
*cmd
,
1150 struct iscsi_scsi_req
*hdr
= (struct iscsi_scsi_req
*)buf
;
1152 bool dump_payload
= false;
1154 rc
= iscsit_setup_scsi_cmd(conn
, cmd
, buf
);
1158 * Allocation iovecs needed for struct socket operations for
1159 * traditional iSCSI block I/O.
1161 if (iscsit_allocate_iovecs(cmd
) < 0) {
1162 return iscsit_add_reject_cmd(cmd
,
1163 ISCSI_REASON_BOOKMARK_NO_RESOURCES
, buf
);
1165 immed_data
= cmd
->immediate_data
;
1167 rc
= iscsit_process_scsi_cmd(conn
, cmd
, hdr
);
1171 dump_payload
= true;
1176 return iscsit_get_immediate_data(cmd
, hdr
, dump_payload
);
1179 static u32
iscsit_do_crypto_hash_sg(
1180 struct hash_desc
*hash
,
1181 struct iscsi_cmd
*cmd
,
1189 struct scatterlist
*sg
;
1190 unsigned int page_off
;
1192 crypto_hash_init(hash
);
1194 sg
= cmd
->first_data_sg
;
1195 page_off
= cmd
->first_data_sg_off
;
1198 while (data_length
) {
1199 u32 cur_len
= min_t(u32
, data_length
, (sg
[i
].length
- page_off
));
1201 crypto_hash_update(hash
, &sg
[i
], cur_len
);
1203 data_length
-= cur_len
;
1209 struct scatterlist pad_sg
;
1211 sg_init_one(&pad_sg
, pad_bytes
, padding
);
1212 crypto_hash_update(hash
, &pad_sg
, padding
);
1214 crypto_hash_final(hash
, (u8
*) &data_crc
);
1219 static void iscsit_do_crypto_hash_buf(
1220 struct hash_desc
*hash
,
1227 struct scatterlist sg
;
1229 crypto_hash_init(hash
);
1231 sg_init_one(&sg
, buf
, payload_length
);
1232 crypto_hash_update(hash
, &sg
, payload_length
);
1235 sg_init_one(&sg
, pad_bytes
, padding
);
1236 crypto_hash_update(hash
, &sg
, padding
);
1238 crypto_hash_final(hash
, data_crc
);
1242 iscsit_check_dataout_hdr(struct iscsi_conn
*conn
, unsigned char *buf
,
1243 struct iscsi_cmd
**out_cmd
)
1245 struct iscsi_data
*hdr
= (struct iscsi_data
*)buf
;
1246 struct iscsi_cmd
*cmd
= NULL
;
1247 struct se_cmd
*se_cmd
;
1248 u32 payload_length
= ntoh24(hdr
->dlength
);
1251 if (!payload_length
) {
1252 pr_err("DataOUT payload is ZERO, protocol error.\n");
1253 return iscsit_add_reject(conn
, ISCSI_REASON_PROTOCOL_ERROR
,
1258 spin_lock_bh(&conn
->sess
->session_stats_lock
);
1259 conn
->sess
->rx_data_octets
+= payload_length
;
1260 if (conn
->sess
->se_sess
->se_node_acl
) {
1261 spin_lock(&conn
->sess
->se_sess
->se_node_acl
->stats_lock
);
1262 conn
->sess
->se_sess
->se_node_acl
->write_bytes
+= payload_length
;
1263 spin_unlock(&conn
->sess
->se_sess
->se_node_acl
->stats_lock
);
1265 spin_unlock_bh(&conn
->sess
->session_stats_lock
);
1267 if (payload_length
> conn
->conn_ops
->MaxXmitDataSegmentLength
) {
1268 pr_err("DataSegmentLength: %u is greater than"
1269 " MaxXmitDataSegmentLength: %u\n", payload_length
,
1270 conn
->conn_ops
->MaxXmitDataSegmentLength
);
1271 return iscsit_add_reject(conn
, ISCSI_REASON_PROTOCOL_ERROR
,
1275 cmd
= iscsit_find_cmd_from_itt_or_dump(conn
, hdr
->itt
,
1280 pr_debug("Got DataOut ITT: 0x%08x, TTT: 0x%08x,"
1281 " DataSN: 0x%08x, Offset: %u, Length: %u, CID: %hu\n",
1282 hdr
->itt
, hdr
->ttt
, hdr
->datasn
, ntohl(hdr
->offset
),
1283 payload_length
, conn
->cid
);
1285 if (cmd
->cmd_flags
& ICF_GOT_LAST_DATAOUT
) {
1286 pr_err("Command ITT: 0x%08x received DataOUT after"
1287 " last DataOUT received, dumping payload\n",
1288 cmd
->init_task_tag
);
1289 return iscsit_dump_data_payload(conn
, payload_length
, 1);
1292 if (cmd
->data_direction
!= DMA_TO_DEVICE
) {
1293 pr_err("Command ITT: 0x%08x received DataOUT for a"
1294 " NON-WRITE command.\n", cmd
->init_task_tag
);
1295 return iscsit_reject_cmd(cmd
, ISCSI_REASON_PROTOCOL_ERROR
, buf
);
1297 se_cmd
= &cmd
->se_cmd
;
1298 iscsit_mod_dataout_timer(cmd
);
1300 if ((be32_to_cpu(hdr
->offset
) + payload_length
) > cmd
->se_cmd
.data_length
) {
1301 pr_err("DataOut Offset: %u, Length %u greater than"
1302 " iSCSI Command EDTL %u, protocol error.\n",
1303 hdr
->offset
, payload_length
, cmd
->se_cmd
.data_length
);
1304 return iscsit_reject_cmd(cmd
, ISCSI_REASON_BOOKMARK_INVALID
, buf
);
1307 if (cmd
->unsolicited_data
) {
1308 int dump_unsolicited_data
= 0;
1310 if (conn
->sess
->sess_ops
->InitialR2T
) {
1311 pr_err("Received unexpected unsolicited data"
1312 " while InitialR2T=Yes, protocol error.\n");
1313 transport_send_check_condition_and_sense(&cmd
->se_cmd
,
1314 TCM_UNEXPECTED_UNSOLICITED_DATA
, 0);
1318 * Special case for dealing with Unsolicited DataOUT
1319 * and Unsupported SAM WRITE Opcodes and SE resource allocation
1323 /* Something's amiss if we're not in WRITE_PENDING state... */
1324 WARN_ON(se_cmd
->t_state
!= TRANSPORT_WRITE_PENDING
);
1325 if (!(se_cmd
->se_cmd_flags
& SCF_SUPPORTED_SAM_OPCODE
))
1326 dump_unsolicited_data
= 1;
1328 if (dump_unsolicited_data
) {
1330 * Check if a delayed TASK_ABORTED status needs to
1331 * be sent now if the ISCSI_FLAG_CMD_FINAL has been
1332 * received with the unsolicitied data out.
1334 if (hdr
->flags
& ISCSI_FLAG_CMD_FINAL
)
1335 iscsit_stop_dataout_timer(cmd
);
1337 transport_check_aborted_status(se_cmd
,
1338 (hdr
->flags
& ISCSI_FLAG_CMD_FINAL
));
1339 return iscsit_dump_data_payload(conn
, payload_length
, 1);
1343 * For the normal solicited data path:
1345 * Check for a delayed TASK_ABORTED status and dump any
1346 * incoming data out payload if one exists. Also, when the
1347 * ISCSI_FLAG_CMD_FINAL is set to denote the end of the current
1348 * data out sequence, we decrement outstanding_r2ts. Once
1349 * outstanding_r2ts reaches zero, go ahead and send the delayed
1350 * TASK_ABORTED status.
1352 if (se_cmd
->transport_state
& CMD_T_ABORTED
) {
1353 if (hdr
->flags
& ISCSI_FLAG_CMD_FINAL
)
1354 if (--cmd
->outstanding_r2ts
< 1) {
1355 iscsit_stop_dataout_timer(cmd
);
1356 transport_check_aborted_status(
1360 return iscsit_dump_data_payload(conn
, payload_length
, 1);
1364 * Preform DataSN, DataSequenceInOrder, DataPDUInOrder, and
1365 * within-command recovery checks before receiving the payload.
1367 rc
= iscsit_check_pre_dataout(cmd
, buf
);
1368 if (rc
== DATAOUT_WITHIN_COMMAND_RECOVERY
)
1370 else if (rc
== DATAOUT_CANNOT_RECOVER
)
1376 EXPORT_SYMBOL(iscsit_check_dataout_hdr
);
1379 iscsit_get_dataout(struct iscsi_conn
*conn
, struct iscsi_cmd
*cmd
,
1380 struct iscsi_data
*hdr
)
1383 u32 checksum
, iov_count
= 0, padding
= 0, rx_got
= 0, rx_size
= 0;
1384 u32 payload_length
= ntoh24(hdr
->dlength
);
1385 int iov_ret
, data_crc_failed
= 0;
1387 rx_size
+= payload_length
;
1388 iov
= &cmd
->iov_data
[0];
1390 iov_ret
= iscsit_map_iovec(cmd
, iov
, be32_to_cpu(hdr
->offset
),
1395 iov_count
+= iov_ret
;
1397 padding
= ((-payload_length
) & 3);
1399 iov
[iov_count
].iov_base
= cmd
->pad_bytes
;
1400 iov
[iov_count
++].iov_len
= padding
;
1402 pr_debug("Receiving %u padding bytes.\n", padding
);
1405 if (conn
->conn_ops
->DataDigest
) {
1406 iov
[iov_count
].iov_base
= &checksum
;
1407 iov
[iov_count
++].iov_len
= ISCSI_CRC_LEN
;
1408 rx_size
+= ISCSI_CRC_LEN
;
1411 rx_got
= rx_data(conn
, &cmd
->iov_data
[0], iov_count
, rx_size
);
1413 iscsit_unmap_iovec(cmd
);
1415 if (rx_got
!= rx_size
)
1418 if (conn
->conn_ops
->DataDigest
) {
1421 data_crc
= iscsit_do_crypto_hash_sg(&conn
->conn_rx_hash
, cmd
,
1422 be32_to_cpu(hdr
->offset
),
1423 payload_length
, padding
,
1426 if (checksum
!= data_crc
) {
1427 pr_err("ITT: 0x%08x, Offset: %u, Length: %u,"
1428 " DataSN: 0x%08x, CRC32C DataDigest 0x%08x"
1429 " does not match computed 0x%08x\n",
1430 hdr
->itt
, hdr
->offset
, payload_length
,
1431 hdr
->datasn
, checksum
, data_crc
);
1432 data_crc_failed
= 1;
1434 pr_debug("Got CRC32C DataDigest 0x%08x for"
1435 " %u bytes of Data Out\n", checksum
,
1440 return data_crc_failed
;
1444 iscsit_check_dataout_payload(struct iscsi_cmd
*cmd
, struct iscsi_data
*hdr
,
1445 bool data_crc_failed
)
1447 struct iscsi_conn
*conn
= cmd
->conn
;
1450 * Increment post receive data and CRC values or perform
1451 * within-command recovery.
1453 rc
= iscsit_check_post_dataout(cmd
, (unsigned char *)hdr
, data_crc_failed
);
1454 if ((rc
== DATAOUT_NORMAL
) || (rc
== DATAOUT_WITHIN_COMMAND_RECOVERY
))
1456 else if (rc
== DATAOUT_SEND_R2T
) {
1457 iscsit_set_dataout_sequence_values(cmd
);
1458 conn
->conn_transport
->iscsit_get_dataout(conn
, cmd
, false);
1459 } else if (rc
== DATAOUT_SEND_TO_TRANSPORT
) {
1461 * Handle extra special case for out of order
1462 * Unsolicited Data Out.
1464 spin_lock_bh(&cmd
->istate_lock
);
1465 ooo_cmdsn
= (cmd
->cmd_flags
& ICF_OOO_CMDSN
);
1466 cmd
->cmd_flags
|= ICF_GOT_LAST_DATAOUT
;
1467 cmd
->i_state
= ISTATE_RECEIVED_LAST_DATAOUT
;
1468 spin_unlock_bh(&cmd
->istate_lock
);
1470 iscsit_stop_dataout_timer(cmd
);
1473 target_execute_cmd(&cmd
->se_cmd
);
1475 } else /* DATAOUT_CANNOT_RECOVER */
1480 EXPORT_SYMBOL(iscsit_check_dataout_payload
);
1482 static int iscsit_handle_data_out(struct iscsi_conn
*conn
, unsigned char *buf
)
1484 struct iscsi_cmd
*cmd
;
1485 struct iscsi_data
*hdr
= (struct iscsi_data
*)buf
;
1487 bool data_crc_failed
= false;
1489 rc
= iscsit_check_dataout_hdr(conn
, buf
, &cmd
);
1495 rc
= iscsit_get_dataout(conn
, cmd
, hdr
);
1499 data_crc_failed
= true;
1501 return iscsit_check_dataout_payload(cmd
, hdr
, data_crc_failed
);
1504 int iscsit_setup_nop_out(struct iscsi_conn
*conn
, struct iscsi_cmd
*cmd
,
1505 struct iscsi_nopout
*hdr
)
1507 u32 payload_length
= ntoh24(hdr
->dlength
);
1509 if (hdr
->itt
== RESERVED_ITT
&& !(hdr
->opcode
& ISCSI_OP_IMMEDIATE
)) {
1510 pr_err("NOPOUT ITT is reserved, but Immediate Bit is"
1511 " not set, protocol error.\n");
1513 return iscsit_add_reject(conn
, ISCSI_REASON_PROTOCOL_ERROR
,
1514 (unsigned char *)hdr
);
1516 return iscsit_reject_cmd(cmd
, ISCSI_REASON_PROTOCOL_ERROR
,
1517 (unsigned char *)hdr
);
1520 if (payload_length
> conn
->conn_ops
->MaxXmitDataSegmentLength
) {
1521 pr_err("NOPOUT Ping Data DataSegmentLength: %u is"
1522 " greater than MaxXmitDataSegmentLength: %u, protocol"
1523 " error.\n", payload_length
,
1524 conn
->conn_ops
->MaxXmitDataSegmentLength
);
1526 return iscsit_add_reject(conn
, ISCSI_REASON_PROTOCOL_ERROR
,
1527 (unsigned char *)hdr
);
1529 return iscsit_reject_cmd(cmd
, ISCSI_REASON_PROTOCOL_ERROR
,
1530 (unsigned char *)hdr
);
1533 pr_debug("Got NOPOUT Ping %s ITT: 0x%08x, TTT: 0x%08x,"
1534 " CmdSN: 0x%08x, ExpStatSN: 0x%08x, Length: %u\n",
1535 hdr
->itt
== RESERVED_ITT
? "Response" : "Request",
1536 hdr
->itt
, hdr
->ttt
, hdr
->cmdsn
, hdr
->exp_statsn
,
1539 * This is not a response to a Unsolicited NopIN, which means
1540 * it can either be a NOPOUT ping request (with a valid ITT),
1541 * or a NOPOUT not requesting a NOPIN (with a reserved ITT).
1542 * Either way, make sure we allocate an struct iscsi_cmd, as both
1543 * can contain ping data.
1545 if (hdr
->ttt
== cpu_to_be32(0xFFFFFFFF)) {
1546 cmd
->iscsi_opcode
= ISCSI_OP_NOOP_OUT
;
1547 cmd
->i_state
= ISTATE_SEND_NOPIN
;
1548 cmd
->immediate_cmd
= ((hdr
->opcode
& ISCSI_OP_IMMEDIATE
) ?
1550 conn
->sess
->init_task_tag
= cmd
->init_task_tag
= hdr
->itt
;
1551 cmd
->targ_xfer_tag
= 0xFFFFFFFF;
1552 cmd
->cmd_sn
= be32_to_cpu(hdr
->cmdsn
);
1553 cmd
->exp_stat_sn
= be32_to_cpu(hdr
->exp_statsn
);
1554 cmd
->data_direction
= DMA_NONE
;
1559 EXPORT_SYMBOL(iscsit_setup_nop_out
);
1561 int iscsit_process_nop_out(struct iscsi_conn
*conn
, struct iscsi_cmd
*cmd
,
1562 struct iscsi_nopout
*hdr
)
1564 struct iscsi_cmd
*cmd_p
= NULL
;
1567 * Initiator is expecting a NopIN ping reply..
1569 if (hdr
->itt
!= RESERVED_ITT
) {
1572 spin_lock_bh(&conn
->cmd_lock
);
1573 list_add_tail(&cmd
->i_conn_node
, &conn
->conn_cmd_list
);
1574 spin_unlock_bh(&conn
->cmd_lock
);
1576 iscsit_ack_from_expstatsn(conn
, be32_to_cpu(hdr
->exp_statsn
));
1578 if (hdr
->opcode
& ISCSI_OP_IMMEDIATE
) {
1579 iscsit_add_cmd_to_response_queue(cmd
, conn
,
1584 cmdsn_ret
= iscsit_sequence_cmd(conn
, cmd
,
1585 (unsigned char *)hdr
, hdr
->cmdsn
);
1586 if (cmdsn_ret
== CMDSN_LOWER_THAN_EXP
)
1588 if (cmdsn_ret
== CMDSN_ERROR_CANNOT_RECOVER
)
1594 * This was a response to a unsolicited NOPIN ping.
1596 if (hdr
->ttt
!= cpu_to_be32(0xFFFFFFFF)) {
1597 cmd_p
= iscsit_find_cmd_from_ttt(conn
, be32_to_cpu(hdr
->ttt
));
1601 iscsit_stop_nopin_response_timer(conn
);
1603 cmd_p
->i_state
= ISTATE_REMOVE
;
1604 iscsit_add_cmd_to_immediate_queue(cmd_p
, conn
, cmd_p
->i_state
);
1606 iscsit_start_nopin_timer(conn
);
1610 * Otherwise, initiator is not expecting a NOPIN is response.
1611 * Just ignore for now.
1615 EXPORT_SYMBOL(iscsit_process_nop_out
);
1617 static int iscsit_handle_nop_out(struct iscsi_conn
*conn
, struct iscsi_cmd
*cmd
,
1620 unsigned char *ping_data
= NULL
;
1621 struct iscsi_nopout
*hdr
= (struct iscsi_nopout
*)buf
;
1622 struct kvec
*iov
= NULL
;
1623 u32 payload_length
= ntoh24(hdr
->dlength
);
1626 ret
= iscsit_setup_nop_out(conn
, cmd
, hdr
);
1630 * Handle NOP-OUT payload for traditional iSCSI sockets
1632 if (payload_length
&& hdr
->ttt
== cpu_to_be32(0xFFFFFFFF)) {
1633 u32 checksum
, data_crc
, padding
= 0;
1634 int niov
= 0, rx_got
, rx_size
= payload_length
;
1636 ping_data
= kzalloc(payload_length
+ 1, GFP_KERNEL
);
1638 pr_err("Unable to allocate memory for"
1639 " NOPOUT ping data.\n");
1644 iov
= &cmd
->iov_misc
[0];
1645 iov
[niov
].iov_base
= ping_data
;
1646 iov
[niov
++].iov_len
= payload_length
;
1648 padding
= ((-payload_length
) & 3);
1650 pr_debug("Receiving %u additional bytes"
1651 " for padding.\n", padding
);
1652 iov
[niov
].iov_base
= &cmd
->pad_bytes
;
1653 iov
[niov
++].iov_len
= padding
;
1656 if (conn
->conn_ops
->DataDigest
) {
1657 iov
[niov
].iov_base
= &checksum
;
1658 iov
[niov
++].iov_len
= ISCSI_CRC_LEN
;
1659 rx_size
+= ISCSI_CRC_LEN
;
1662 rx_got
= rx_data(conn
, &cmd
->iov_misc
[0], niov
, rx_size
);
1663 if (rx_got
!= rx_size
) {
1668 if (conn
->conn_ops
->DataDigest
) {
1669 iscsit_do_crypto_hash_buf(&conn
->conn_rx_hash
,
1670 ping_data
, payload_length
,
1671 padding
, cmd
->pad_bytes
,
1674 if (checksum
!= data_crc
) {
1675 pr_err("Ping data CRC32C DataDigest"
1676 " 0x%08x does not match computed 0x%08x\n",
1677 checksum
, data_crc
);
1678 if (!conn
->sess
->sess_ops
->ErrorRecoveryLevel
) {
1679 pr_err("Unable to recover from"
1680 " NOPOUT Ping DataCRC failure while in"
1686 * Silently drop this PDU and let the
1687 * initiator plug the CmdSN gap.
1689 pr_debug("Dropping NOPOUT"
1690 " Command CmdSN: 0x%08x due to"
1691 " DataCRC error.\n", hdr
->cmdsn
);
1696 pr_debug("Got CRC32C DataDigest"
1697 " 0x%08x for %u bytes of ping data.\n",
1698 checksum
, payload_length
);
1702 ping_data
[payload_length
] = '\0';
1704 * Attach ping data to struct iscsi_cmd->buf_ptr.
1706 cmd
->buf_ptr
= ping_data
;
1707 cmd
->buf_ptr_size
= payload_length
;
1709 pr_debug("Got %u bytes of NOPOUT ping"
1710 " data.\n", payload_length
);
1711 pr_debug("Ping Data: \"%s\"\n", ping_data
);
1714 return iscsit_process_nop_out(conn
, cmd
, hdr
);
1717 iscsit_free_cmd(cmd
, false);
1724 iscsit_handle_task_mgt_cmd(struct iscsi_conn
*conn
, struct iscsi_cmd
*cmd
,
1727 struct se_tmr_req
*se_tmr
;
1728 struct iscsi_tmr_req
*tmr_req
;
1729 struct iscsi_tm
*hdr
;
1730 int out_of_order_cmdsn
= 0, ret
;
1731 bool sess_ref
= false;
1734 hdr
= (struct iscsi_tm
*) buf
;
1735 hdr
->flags
&= ~ISCSI_FLAG_CMD_FINAL
;
1736 function
= hdr
->flags
;
1738 pr_debug("Got Task Management Request ITT: 0x%08x, CmdSN:"
1739 " 0x%08x, Function: 0x%02x, RefTaskTag: 0x%08x, RefCmdSN:"
1740 " 0x%08x, CID: %hu\n", hdr
->itt
, hdr
->cmdsn
, function
,
1741 hdr
->rtt
, hdr
->refcmdsn
, conn
->cid
);
1743 if ((function
!= ISCSI_TM_FUNC_ABORT_TASK
) &&
1744 ((function
!= ISCSI_TM_FUNC_TASK_REASSIGN
) &&
1745 hdr
->rtt
!= RESERVED_ITT
)) {
1746 pr_err("RefTaskTag should be set to 0xFFFFFFFF.\n");
1747 hdr
->rtt
= RESERVED_ITT
;
1750 if ((function
== ISCSI_TM_FUNC_TASK_REASSIGN
) &&
1751 !(hdr
->opcode
& ISCSI_OP_IMMEDIATE
)) {
1752 pr_err("Task Management Request TASK_REASSIGN not"
1753 " issued as immediate command, bad iSCSI Initiator"
1754 "implementation\n");
1755 return iscsit_add_reject_cmd(cmd
,
1756 ISCSI_REASON_PROTOCOL_ERROR
, buf
);
1758 if ((function
!= ISCSI_TM_FUNC_ABORT_TASK
) &&
1759 be32_to_cpu(hdr
->refcmdsn
) != ISCSI_RESERVED_TAG
)
1760 hdr
->refcmdsn
= cpu_to_be32(ISCSI_RESERVED_TAG
);
1762 cmd
->data_direction
= DMA_NONE
;
1764 cmd
->tmr_req
= kzalloc(sizeof(struct iscsi_tmr_req
), GFP_KERNEL
);
1765 if (!cmd
->tmr_req
) {
1766 pr_err("Unable to allocate memory for"
1767 " Task Management command!\n");
1768 return iscsit_add_reject_cmd(cmd
,
1769 ISCSI_REASON_BOOKMARK_NO_RESOURCES
,
1774 * TASK_REASSIGN for ERL=2 / connection stays inside of
1775 * LIO-Target $FABRIC_MOD
1777 if (function
!= ISCSI_TM_FUNC_TASK_REASSIGN
) {
1782 transport_init_se_cmd(&cmd
->se_cmd
,
1783 &lio_target_fabric_configfs
->tf_ops
,
1784 conn
->sess
->se_sess
, 0, DMA_NONE
,
1785 MSG_SIMPLE_TAG
, cmd
->sense_buffer
+ 2);
1787 target_get_sess_cmd(conn
->sess
->se_sess
, &cmd
->se_cmd
, true);
1791 case ISCSI_TM_FUNC_ABORT_TASK
:
1792 tcm_function
= TMR_ABORT_TASK
;
1794 case ISCSI_TM_FUNC_ABORT_TASK_SET
:
1795 tcm_function
= TMR_ABORT_TASK_SET
;
1797 case ISCSI_TM_FUNC_CLEAR_ACA
:
1798 tcm_function
= TMR_CLEAR_ACA
;
1800 case ISCSI_TM_FUNC_CLEAR_TASK_SET
:
1801 tcm_function
= TMR_CLEAR_TASK_SET
;
1803 case ISCSI_TM_FUNC_LOGICAL_UNIT_RESET
:
1804 tcm_function
= TMR_LUN_RESET
;
1806 case ISCSI_TM_FUNC_TARGET_WARM_RESET
:
1807 tcm_function
= TMR_TARGET_WARM_RESET
;
1809 case ISCSI_TM_FUNC_TARGET_COLD_RESET
:
1810 tcm_function
= TMR_TARGET_COLD_RESET
;
1813 pr_err("Unknown iSCSI TMR Function:"
1814 " 0x%02x\n", function
);
1815 return iscsit_add_reject_cmd(cmd
,
1816 ISCSI_REASON_BOOKMARK_NO_RESOURCES
, buf
);
1819 ret
= core_tmr_alloc_req(&cmd
->se_cmd
, cmd
->tmr_req
,
1820 tcm_function
, GFP_KERNEL
);
1822 return iscsit_add_reject_cmd(cmd
,
1823 ISCSI_REASON_BOOKMARK_NO_RESOURCES
, buf
);
1825 cmd
->tmr_req
->se_tmr_req
= cmd
->se_cmd
.se_tmr_req
;
1828 cmd
->iscsi_opcode
= ISCSI_OP_SCSI_TMFUNC
;
1829 cmd
->i_state
= ISTATE_SEND_TASKMGTRSP
;
1830 cmd
->immediate_cmd
= ((hdr
->opcode
& ISCSI_OP_IMMEDIATE
) ? 1 : 0);
1831 cmd
->init_task_tag
= hdr
->itt
;
1832 cmd
->targ_xfer_tag
= 0xFFFFFFFF;
1833 cmd
->cmd_sn
= be32_to_cpu(hdr
->cmdsn
);
1834 cmd
->exp_stat_sn
= be32_to_cpu(hdr
->exp_statsn
);
1835 se_tmr
= cmd
->se_cmd
.se_tmr_req
;
1836 tmr_req
= cmd
->tmr_req
;
1838 * Locate the struct se_lun for all TMRs not related to ERL=2 TASK_REASSIGN
1840 if (function
!= ISCSI_TM_FUNC_TASK_REASSIGN
) {
1841 ret
= transport_lookup_tmr_lun(&cmd
->se_cmd
,
1842 scsilun_to_int(&hdr
->lun
));
1844 se_tmr
->response
= ISCSI_TMF_RSP_NO_LUN
;
1850 case ISCSI_TM_FUNC_ABORT_TASK
:
1851 se_tmr
->response
= iscsit_tmr_abort_task(cmd
, buf
);
1852 if (se_tmr
->response
)
1855 case ISCSI_TM_FUNC_ABORT_TASK_SET
:
1856 case ISCSI_TM_FUNC_CLEAR_ACA
:
1857 case ISCSI_TM_FUNC_CLEAR_TASK_SET
:
1858 case ISCSI_TM_FUNC_LOGICAL_UNIT_RESET
:
1860 case ISCSI_TM_FUNC_TARGET_WARM_RESET
:
1861 if (iscsit_tmr_task_warm_reset(conn
, tmr_req
, buf
) < 0) {
1862 se_tmr
->response
= ISCSI_TMF_RSP_AUTH_FAILED
;
1866 case ISCSI_TM_FUNC_TARGET_COLD_RESET
:
1867 if (iscsit_tmr_task_cold_reset(conn
, tmr_req
, buf
) < 0) {
1868 se_tmr
->response
= ISCSI_TMF_RSP_AUTH_FAILED
;
1872 case ISCSI_TM_FUNC_TASK_REASSIGN
:
1873 se_tmr
->response
= iscsit_tmr_task_reassign(cmd
, buf
);
1875 * Perform sanity checks on the ExpDataSN only if the
1876 * TASK_REASSIGN was successful.
1878 if (se_tmr
->response
)
1881 if (iscsit_check_task_reassign_expdatasn(tmr_req
, conn
) < 0)
1882 return iscsit_add_reject_cmd(cmd
,
1883 ISCSI_REASON_BOOKMARK_INVALID
, buf
);
1886 pr_err("Unknown TMR function: 0x%02x, protocol"
1887 " error.\n", function
);
1888 se_tmr
->response
= ISCSI_TMF_RSP_NOT_SUPPORTED
;
1892 if ((function
!= ISCSI_TM_FUNC_TASK_REASSIGN
) &&
1893 (se_tmr
->response
== ISCSI_TMF_RSP_COMPLETE
))
1894 se_tmr
->call_transport
= 1;
1896 spin_lock_bh(&conn
->cmd_lock
);
1897 list_add_tail(&cmd
->i_conn_node
, &conn
->conn_cmd_list
);
1898 spin_unlock_bh(&conn
->cmd_lock
);
1900 if (!(hdr
->opcode
& ISCSI_OP_IMMEDIATE
)) {
1901 int cmdsn_ret
= iscsit_sequence_cmd(conn
, cmd
, buf
, hdr
->cmdsn
);
1902 if (cmdsn_ret
== CMDSN_HIGHER_THAN_EXP
)
1903 out_of_order_cmdsn
= 1;
1904 else if (cmdsn_ret
== CMDSN_LOWER_THAN_EXP
)
1906 else if (cmdsn_ret
== CMDSN_ERROR_CANNOT_RECOVER
)
1909 iscsit_ack_from_expstatsn(conn
, be32_to_cpu(hdr
->exp_statsn
));
1911 if (out_of_order_cmdsn
|| !(hdr
->opcode
& ISCSI_OP_IMMEDIATE
))
1914 * Found the referenced task, send to transport for processing.
1916 if (se_tmr
->call_transport
)
1917 return transport_generic_handle_tmr(&cmd
->se_cmd
);
1920 * Could not find the referenced LUN, task, or Task Management
1921 * command not authorized or supported. Change state and
1922 * let the tx_thread send the response.
1924 * For connection recovery, this is also the default action for
1925 * TMR TASK_REASSIGN.
1928 pr_debug("Handle TMR, using sess_ref=true check\n");
1929 target_put_sess_cmd(conn
->sess
->se_sess
, &cmd
->se_cmd
);
1932 iscsit_add_cmd_to_response_queue(cmd
, conn
, cmd
->i_state
);
1935 EXPORT_SYMBOL(iscsit_handle_task_mgt_cmd
);
1937 /* #warning FIXME: Support Text Command parameters besides SendTargets */
1939 iscsit_setup_text_cmd(struct iscsi_conn
*conn
, struct iscsi_cmd
*cmd
,
1940 struct iscsi_text
*hdr
)
1942 u32 payload_length
= ntoh24(hdr
->dlength
);
1944 if (payload_length
> conn
->conn_ops
->MaxXmitDataSegmentLength
) {
1945 pr_err("Unable to accept text parameter length: %u"
1946 "greater than MaxXmitDataSegmentLength %u.\n",
1947 payload_length
, conn
->conn_ops
->MaxXmitDataSegmentLength
);
1948 return iscsit_reject_cmd(cmd
, ISCSI_REASON_PROTOCOL_ERROR
,
1949 (unsigned char *)hdr
);
1952 pr_debug("Got Text Request: ITT: 0x%08x, CmdSN: 0x%08x,"
1953 " ExpStatSN: 0x%08x, Length: %u\n", hdr
->itt
, hdr
->cmdsn
,
1954 hdr
->exp_statsn
, payload_length
);
1956 cmd
->iscsi_opcode
= ISCSI_OP_TEXT
;
1957 cmd
->i_state
= ISTATE_SEND_TEXTRSP
;
1958 cmd
->immediate_cmd
= ((hdr
->opcode
& ISCSI_OP_IMMEDIATE
) ? 1 : 0);
1959 conn
->sess
->init_task_tag
= cmd
->init_task_tag
= hdr
->itt
;
1960 cmd
->targ_xfer_tag
= 0xFFFFFFFF;
1961 cmd
->cmd_sn
= be32_to_cpu(hdr
->cmdsn
);
1962 cmd
->exp_stat_sn
= be32_to_cpu(hdr
->exp_statsn
);
1963 cmd
->data_direction
= DMA_NONE
;
1967 EXPORT_SYMBOL(iscsit_setup_text_cmd
);
1970 iscsit_process_text_cmd(struct iscsi_conn
*conn
, struct iscsi_cmd
*cmd
,
1971 struct iscsi_text
*hdr
)
1973 unsigned char *text_in
= cmd
->text_in_ptr
, *text_ptr
;
1977 pr_err("Unable to locate text_in buffer for sendtargets"
1981 if (strncmp("SendTargets", text_in
, 11) != 0) {
1982 pr_err("Received Text Data that is not"
1983 " SendTargets, cannot continue.\n");
1986 text_ptr
= strchr(text_in
, '=');
1988 pr_err("No \"=\" separator found in Text Data,"
1989 " cannot continue.\n");
1992 if (!strncmp("=All", text_ptr
, 4)) {
1993 cmd
->cmd_flags
|= IFC_SENDTARGETS_ALL
;
1994 } else if (!strncmp("=iqn.", text_ptr
, 5) ||
1995 !strncmp("=eui.", text_ptr
, 5)) {
1996 cmd
->cmd_flags
|= IFC_SENDTARGETS_SINGLE
;
1998 pr_err("Unable to locate valid SendTargets=%s value\n", text_ptr
);
2002 spin_lock_bh(&conn
->cmd_lock
);
2003 list_add_tail(&cmd
->i_conn_node
, &conn
->conn_cmd_list
);
2004 spin_unlock_bh(&conn
->cmd_lock
);
2006 iscsit_ack_from_expstatsn(conn
, be32_to_cpu(hdr
->exp_statsn
));
2008 if (!(hdr
->opcode
& ISCSI_OP_IMMEDIATE
)) {
2009 cmdsn_ret
= iscsit_sequence_cmd(conn
, cmd
,
2010 (unsigned char *)hdr
, hdr
->cmdsn
);
2011 if (cmdsn_ret
== CMDSN_ERROR_CANNOT_RECOVER
)
2017 return iscsit_execute_cmd(cmd
, 0);
2020 return iscsit_reject_cmd(cmd
, ISCSI_REASON_PROTOCOL_ERROR
,
2021 (unsigned char *)hdr
);
2023 EXPORT_SYMBOL(iscsit_process_text_cmd
);
2026 iscsit_handle_text_cmd(struct iscsi_conn
*conn
, struct iscsi_cmd
*cmd
,
2029 struct iscsi_text
*hdr
= (struct iscsi_text
*)buf
;
2030 char *text_in
= NULL
;
2031 u32 payload_length
= ntoh24(hdr
->dlength
);
2034 rc
= iscsit_setup_text_cmd(conn
, cmd
, hdr
);
2038 rx_size
= payload_length
;
2039 if (payload_length
) {
2040 u32 checksum
= 0, data_crc
= 0;
2041 u32 padding
= 0, pad_bytes
= 0;
2042 int niov
= 0, rx_got
;
2045 text_in
= kzalloc(payload_length
, GFP_KERNEL
);
2047 pr_err("Unable to allocate memory for"
2048 " incoming text parameters\n");
2051 cmd
->text_in_ptr
= text_in
;
2053 memset(iov
, 0, 3 * sizeof(struct kvec
));
2054 iov
[niov
].iov_base
= text_in
;
2055 iov
[niov
++].iov_len
= payload_length
;
2057 padding
= ((-payload_length
) & 3);
2059 iov
[niov
].iov_base
= &pad_bytes
;
2060 iov
[niov
++].iov_len
= padding
;
2062 pr_debug("Receiving %u additional bytes"
2063 " for padding.\n", padding
);
2065 if (conn
->conn_ops
->DataDigest
) {
2066 iov
[niov
].iov_base
= &checksum
;
2067 iov
[niov
++].iov_len
= ISCSI_CRC_LEN
;
2068 rx_size
+= ISCSI_CRC_LEN
;
2071 rx_got
= rx_data(conn
, &iov
[0], niov
, rx_size
);
2072 if (rx_got
!= rx_size
)
2075 if (conn
->conn_ops
->DataDigest
) {
2076 iscsit_do_crypto_hash_buf(&conn
->conn_rx_hash
,
2077 text_in
, payload_length
,
2078 padding
, (u8
*)&pad_bytes
,
2081 if (checksum
!= data_crc
) {
2082 pr_err("Text data CRC32C DataDigest"
2083 " 0x%08x does not match computed"
2084 " 0x%08x\n", checksum
, data_crc
);
2085 if (!conn
->sess
->sess_ops
->ErrorRecoveryLevel
) {
2086 pr_err("Unable to recover from"
2087 " Text Data digest failure while in"
2092 * Silently drop this PDU and let the
2093 * initiator plug the CmdSN gap.
2095 pr_debug("Dropping Text"
2096 " Command CmdSN: 0x%08x due to"
2097 " DataCRC error.\n", hdr
->cmdsn
);
2102 pr_debug("Got CRC32C DataDigest"
2103 " 0x%08x for %u bytes of text data.\n",
2104 checksum
, payload_length
);
2107 text_in
[payload_length
- 1] = '\0';
2108 pr_debug("Successfully read %d bytes of text"
2109 " data.\n", payload_length
);
2112 return iscsit_process_text_cmd(conn
, cmd
, hdr
);
2115 kfree(cmd
->text_in_ptr
);
2116 cmd
->text_in_ptr
= NULL
;
2117 return iscsit_reject_cmd(cmd
, ISCSI_REASON_PROTOCOL_ERROR
, buf
);
2119 EXPORT_SYMBOL(iscsit_handle_text_cmd
);
2121 int iscsit_logout_closesession(struct iscsi_cmd
*cmd
, struct iscsi_conn
*conn
)
2123 struct iscsi_conn
*conn_p
;
2124 struct iscsi_session
*sess
= conn
->sess
;
2126 pr_debug("Received logout request CLOSESESSION on CID: %hu"
2127 " for SID: %u.\n", conn
->cid
, conn
->sess
->sid
);
2129 atomic_set(&sess
->session_logout
, 1);
2130 atomic_set(&conn
->conn_logout_remove
, 1);
2131 conn
->conn_logout_reason
= ISCSI_LOGOUT_REASON_CLOSE_SESSION
;
2133 iscsit_inc_conn_usage_count(conn
);
2134 iscsit_inc_session_usage_count(sess
);
2136 spin_lock_bh(&sess
->conn_lock
);
2137 list_for_each_entry(conn_p
, &sess
->sess_conn_list
, conn_list
) {
2138 if (conn_p
->conn_state
!= TARG_CONN_STATE_LOGGED_IN
)
2141 pr_debug("Moving to TARG_CONN_STATE_IN_LOGOUT.\n");
2142 conn_p
->conn_state
= TARG_CONN_STATE_IN_LOGOUT
;
2144 spin_unlock_bh(&sess
->conn_lock
);
2146 iscsit_add_cmd_to_response_queue(cmd
, conn
, cmd
->i_state
);
2151 int iscsit_logout_closeconnection(struct iscsi_cmd
*cmd
, struct iscsi_conn
*conn
)
2153 struct iscsi_conn
*l_conn
;
2154 struct iscsi_session
*sess
= conn
->sess
;
2156 pr_debug("Received logout request CLOSECONNECTION for CID:"
2157 " %hu on CID: %hu.\n", cmd
->logout_cid
, conn
->cid
);
2160 * A Logout Request with a CLOSECONNECTION reason code for a CID
2161 * can arrive on a connection with a differing CID.
2163 if (conn
->cid
== cmd
->logout_cid
) {
2164 spin_lock_bh(&conn
->state_lock
);
2165 pr_debug("Moving to TARG_CONN_STATE_IN_LOGOUT.\n");
2166 conn
->conn_state
= TARG_CONN_STATE_IN_LOGOUT
;
2168 atomic_set(&conn
->conn_logout_remove
, 1);
2169 conn
->conn_logout_reason
= ISCSI_LOGOUT_REASON_CLOSE_CONNECTION
;
2170 iscsit_inc_conn_usage_count(conn
);
2172 spin_unlock_bh(&conn
->state_lock
);
2175 * Handle all different cid CLOSECONNECTION requests in
2176 * iscsit_logout_post_handler_diffcid() as to give enough
2177 * time for any non immediate command's CmdSN to be
2178 * acknowledged on the connection in question.
2180 * Here we simply make sure the CID is still around.
2182 l_conn
= iscsit_get_conn_from_cid(sess
,
2185 cmd
->logout_response
= ISCSI_LOGOUT_CID_NOT_FOUND
;
2186 iscsit_add_cmd_to_response_queue(cmd
, conn
,
2191 iscsit_dec_conn_usage_count(l_conn
);
2194 iscsit_add_cmd_to_response_queue(cmd
, conn
, cmd
->i_state
);
2199 int iscsit_logout_removeconnforrecovery(struct iscsi_cmd
*cmd
, struct iscsi_conn
*conn
)
2201 struct iscsi_session
*sess
= conn
->sess
;
2203 pr_debug("Received explicit REMOVECONNFORRECOVERY logout for"
2204 " CID: %hu on CID: %hu.\n", cmd
->logout_cid
, conn
->cid
);
2206 if (sess
->sess_ops
->ErrorRecoveryLevel
!= 2) {
2207 pr_err("Received Logout Request REMOVECONNFORRECOVERY"
2208 " while ERL!=2.\n");
2209 cmd
->logout_response
= ISCSI_LOGOUT_RECOVERY_UNSUPPORTED
;
2210 iscsit_add_cmd_to_response_queue(cmd
, conn
, cmd
->i_state
);
2214 if (conn
->cid
== cmd
->logout_cid
) {
2215 pr_err("Received Logout Request REMOVECONNFORRECOVERY"
2216 " with CID: %hu on CID: %hu, implementation error.\n",
2217 cmd
->logout_cid
, conn
->cid
);
2218 cmd
->logout_response
= ISCSI_LOGOUT_CLEANUP_FAILED
;
2219 iscsit_add_cmd_to_response_queue(cmd
, conn
, cmd
->i_state
);
2223 iscsit_add_cmd_to_response_queue(cmd
, conn
, cmd
->i_state
);
2229 iscsit_handle_logout_cmd(struct iscsi_conn
*conn
, struct iscsi_cmd
*cmd
,
2232 int cmdsn_ret
, logout_remove
= 0;
2234 struct iscsi_logout
*hdr
;
2235 struct iscsi_tiqn
*tiqn
= iscsit_snmp_get_tiqn(conn
);
2237 hdr
= (struct iscsi_logout
*) buf
;
2238 reason_code
= (hdr
->flags
& 0x7f);
2241 spin_lock(&tiqn
->logout_stats
.lock
);
2242 if (reason_code
== ISCSI_LOGOUT_REASON_CLOSE_SESSION
)
2243 tiqn
->logout_stats
.normal_logouts
++;
2245 tiqn
->logout_stats
.abnormal_logouts
++;
2246 spin_unlock(&tiqn
->logout_stats
.lock
);
2249 pr_debug("Got Logout Request ITT: 0x%08x CmdSN: 0x%08x"
2250 " ExpStatSN: 0x%08x Reason: 0x%02x CID: %hu on CID: %hu\n",
2251 hdr
->itt
, hdr
->cmdsn
, hdr
->exp_statsn
, reason_code
,
2252 hdr
->cid
, conn
->cid
);
2254 if (conn
->conn_state
!= TARG_CONN_STATE_LOGGED_IN
) {
2255 pr_err("Received logout request on connection that"
2256 " is not in logged in state, ignoring request.\n");
2257 iscsit_free_cmd(cmd
, false);
2261 cmd
->iscsi_opcode
= ISCSI_OP_LOGOUT
;
2262 cmd
->i_state
= ISTATE_SEND_LOGOUTRSP
;
2263 cmd
->immediate_cmd
= ((hdr
->opcode
& ISCSI_OP_IMMEDIATE
) ? 1 : 0);
2264 conn
->sess
->init_task_tag
= cmd
->init_task_tag
= hdr
->itt
;
2265 cmd
->targ_xfer_tag
= 0xFFFFFFFF;
2266 cmd
->cmd_sn
= be32_to_cpu(hdr
->cmdsn
);
2267 cmd
->exp_stat_sn
= be32_to_cpu(hdr
->exp_statsn
);
2268 cmd
->logout_cid
= be16_to_cpu(hdr
->cid
);
2269 cmd
->logout_reason
= reason_code
;
2270 cmd
->data_direction
= DMA_NONE
;
2273 * We need to sleep in these cases (by returning 1) until the Logout
2274 * Response gets sent in the tx thread.
2276 if ((reason_code
== ISCSI_LOGOUT_REASON_CLOSE_SESSION
) ||
2277 ((reason_code
== ISCSI_LOGOUT_REASON_CLOSE_CONNECTION
) &&
2278 be16_to_cpu(hdr
->cid
) == conn
->cid
))
2281 spin_lock_bh(&conn
->cmd_lock
);
2282 list_add_tail(&cmd
->i_conn_node
, &conn
->conn_cmd_list
);
2283 spin_unlock_bh(&conn
->cmd_lock
);
2285 if (reason_code
!= ISCSI_LOGOUT_REASON_RECOVERY
)
2286 iscsit_ack_from_expstatsn(conn
, be32_to_cpu(hdr
->exp_statsn
));
2289 * Immediate commands are executed, well, immediately.
2290 * Non-Immediate Logout Commands are executed in CmdSN order.
2292 if (cmd
->immediate_cmd
) {
2293 int ret
= iscsit_execute_cmd(cmd
, 0);
2298 cmdsn_ret
= iscsit_sequence_cmd(conn
, cmd
, buf
, hdr
->cmdsn
);
2299 if (cmdsn_ret
== CMDSN_LOWER_THAN_EXP
)
2301 else if (cmdsn_ret
== CMDSN_ERROR_CANNOT_RECOVER
)
2305 return logout_remove
;
2307 EXPORT_SYMBOL(iscsit_handle_logout_cmd
);
2309 static int iscsit_handle_snack(
2310 struct iscsi_conn
*conn
,
2313 struct iscsi_snack
*hdr
;
2315 hdr
= (struct iscsi_snack
*) buf
;
2316 hdr
->flags
&= ~ISCSI_FLAG_CMD_FINAL
;
2318 pr_debug("Got ISCSI_INIT_SNACK, ITT: 0x%08x, ExpStatSN:"
2319 " 0x%08x, Type: 0x%02x, BegRun: 0x%08x, RunLength: 0x%08x,"
2320 " CID: %hu\n", hdr
->itt
, hdr
->exp_statsn
, hdr
->flags
,
2321 hdr
->begrun
, hdr
->runlength
, conn
->cid
);
2323 if (!conn
->sess
->sess_ops
->ErrorRecoveryLevel
) {
2324 pr_err("Initiator sent SNACK request while in"
2325 " ErrorRecoveryLevel=0.\n");
2326 return iscsit_add_reject(conn
, ISCSI_REASON_PROTOCOL_ERROR
,
2330 * SNACK_DATA and SNACK_R2T are both 0, so check which function to
2331 * call from inside iscsi_send_recovery_datain_or_r2t().
2333 switch (hdr
->flags
& ISCSI_FLAG_SNACK_TYPE_MASK
) {
2335 return iscsit_handle_recovery_datain_or_r2t(conn
, buf
,
2337 be32_to_cpu(hdr
->ttt
),
2338 be32_to_cpu(hdr
->begrun
),
2339 be32_to_cpu(hdr
->runlength
));
2340 case ISCSI_FLAG_SNACK_TYPE_STATUS
:
2341 return iscsit_handle_status_snack(conn
, hdr
->itt
,
2342 be32_to_cpu(hdr
->ttt
),
2343 be32_to_cpu(hdr
->begrun
), be32_to_cpu(hdr
->runlength
));
2344 case ISCSI_FLAG_SNACK_TYPE_DATA_ACK
:
2345 return iscsit_handle_data_ack(conn
, be32_to_cpu(hdr
->ttt
),
2346 be32_to_cpu(hdr
->begrun
),
2347 be32_to_cpu(hdr
->runlength
));
2348 case ISCSI_FLAG_SNACK_TYPE_RDATA
:
2349 /* FIXME: Support R-Data SNACK */
2350 pr_err("R-Data SNACK Not Supported.\n");
2351 return iscsit_add_reject(conn
, ISCSI_REASON_PROTOCOL_ERROR
,
2354 pr_err("Unknown SNACK type 0x%02x, protocol"
2355 " error.\n", hdr
->flags
& 0x0f);
2356 return iscsit_add_reject(conn
, ISCSI_REASON_PROTOCOL_ERROR
,
2363 static void iscsit_rx_thread_wait_for_tcp(struct iscsi_conn
*conn
)
2365 if ((conn
->sock
->sk
->sk_shutdown
& SEND_SHUTDOWN
) ||
2366 (conn
->sock
->sk
->sk_shutdown
& RCV_SHUTDOWN
)) {
2367 wait_for_completion_interruptible_timeout(
2368 &conn
->rx_half_close_comp
,
2369 ISCSI_RX_THREAD_TCP_TIMEOUT
* HZ
);
2373 static int iscsit_handle_immediate_data(
2374 struct iscsi_cmd
*cmd
,
2375 struct iscsi_scsi_req
*hdr
,
2378 int iov_ret
, rx_got
= 0, rx_size
= 0;
2379 u32 checksum
, iov_count
= 0, padding
= 0;
2380 struct iscsi_conn
*conn
= cmd
->conn
;
2383 iov_ret
= iscsit_map_iovec(cmd
, cmd
->iov_data
, cmd
->write_data_done
, length
);
2385 return IMMEDIATE_DATA_CANNOT_RECOVER
;
2388 iov_count
= iov_ret
;
2389 iov
= &cmd
->iov_data
[0];
2391 padding
= ((-length
) & 3);
2393 iov
[iov_count
].iov_base
= cmd
->pad_bytes
;
2394 iov
[iov_count
++].iov_len
= padding
;
2398 if (conn
->conn_ops
->DataDigest
) {
2399 iov
[iov_count
].iov_base
= &checksum
;
2400 iov
[iov_count
++].iov_len
= ISCSI_CRC_LEN
;
2401 rx_size
+= ISCSI_CRC_LEN
;
2404 rx_got
= rx_data(conn
, &cmd
->iov_data
[0], iov_count
, rx_size
);
2406 iscsit_unmap_iovec(cmd
);
2408 if (rx_got
!= rx_size
) {
2409 iscsit_rx_thread_wait_for_tcp(conn
);
2410 return IMMEDIATE_DATA_CANNOT_RECOVER
;
2413 if (conn
->conn_ops
->DataDigest
) {
2416 data_crc
= iscsit_do_crypto_hash_sg(&conn
->conn_rx_hash
, cmd
,
2417 cmd
->write_data_done
, length
, padding
,
2420 if (checksum
!= data_crc
) {
2421 pr_err("ImmediateData CRC32C DataDigest 0x%08x"
2422 " does not match computed 0x%08x\n", checksum
,
2425 if (!conn
->sess
->sess_ops
->ErrorRecoveryLevel
) {
2426 pr_err("Unable to recover from"
2427 " Immediate Data digest failure while"
2429 iscsit_reject_cmd(cmd
,
2430 ISCSI_REASON_DATA_DIGEST_ERROR
,
2431 (unsigned char *)hdr
);
2432 return IMMEDIATE_DATA_CANNOT_RECOVER
;
2434 iscsit_reject_cmd(cmd
,
2435 ISCSI_REASON_DATA_DIGEST_ERROR
,
2436 (unsigned char *)hdr
);
2437 return IMMEDIATE_DATA_ERL1_CRC_FAILURE
;
2440 pr_debug("Got CRC32C DataDigest 0x%08x for"
2441 " %u bytes of Immediate Data\n", checksum
,
2446 cmd
->write_data_done
+= length
;
2448 if (cmd
->write_data_done
== cmd
->se_cmd
.data_length
) {
2449 spin_lock_bh(&cmd
->istate_lock
);
2450 cmd
->cmd_flags
|= ICF_GOT_LAST_DATAOUT
;
2451 cmd
->i_state
= ISTATE_RECEIVED_LAST_DATAOUT
;
2452 spin_unlock_bh(&cmd
->istate_lock
);
2455 return IMMEDIATE_DATA_NORMAL_OPERATION
;
2459 * Called with sess->conn_lock held.
2461 /* #warning iscsi_build_conn_drop_async_message() only sends out on connections
2462 with active network interface */
2463 static void iscsit_build_conn_drop_async_message(struct iscsi_conn
*conn
)
2465 struct iscsi_cmd
*cmd
;
2466 struct iscsi_conn
*conn_p
;
2469 * Only send a Asynchronous Message on connections whos network
2470 * interface is still functional.
2472 list_for_each_entry(conn_p
, &conn
->sess
->sess_conn_list
, conn_list
) {
2473 if (conn_p
->conn_state
== TARG_CONN_STATE_LOGGED_IN
) {
2474 iscsit_inc_conn_usage_count(conn_p
);
2482 cmd
= iscsit_allocate_cmd(conn_p
, GFP_ATOMIC
);
2484 iscsit_dec_conn_usage_count(conn_p
);
2488 cmd
->logout_cid
= conn
->cid
;
2489 cmd
->iscsi_opcode
= ISCSI_OP_ASYNC_EVENT
;
2490 cmd
->i_state
= ISTATE_SEND_ASYNCMSG
;
2492 spin_lock_bh(&conn_p
->cmd_lock
);
2493 list_add_tail(&cmd
->i_conn_node
, &conn_p
->conn_cmd_list
);
2494 spin_unlock_bh(&conn_p
->cmd_lock
);
2496 iscsit_add_cmd_to_response_queue(cmd
, conn_p
, cmd
->i_state
);
2497 iscsit_dec_conn_usage_count(conn_p
);
2500 static int iscsit_send_conn_drop_async_message(
2501 struct iscsi_cmd
*cmd
,
2502 struct iscsi_conn
*conn
)
2504 struct iscsi_async
*hdr
;
2506 cmd
->tx_size
= ISCSI_HDR_LEN
;
2507 cmd
->iscsi_opcode
= ISCSI_OP_ASYNC_EVENT
;
2509 hdr
= (struct iscsi_async
*) cmd
->pdu
;
2510 hdr
->opcode
= ISCSI_OP_ASYNC_EVENT
;
2511 hdr
->flags
= ISCSI_FLAG_CMD_FINAL
;
2512 cmd
->init_task_tag
= RESERVED_ITT
;
2513 cmd
->targ_xfer_tag
= 0xFFFFFFFF;
2514 put_unaligned_be64(0xFFFFFFFFFFFFFFFFULL
, &hdr
->rsvd4
[0]);
2515 cmd
->stat_sn
= conn
->stat_sn
++;
2516 hdr
->statsn
= cpu_to_be32(cmd
->stat_sn
);
2517 hdr
->exp_cmdsn
= cpu_to_be32(conn
->sess
->exp_cmd_sn
);
2518 hdr
->max_cmdsn
= cpu_to_be32(conn
->sess
->max_cmd_sn
);
2519 hdr
->async_event
= ISCSI_ASYNC_MSG_DROPPING_CONNECTION
;
2520 hdr
->param1
= cpu_to_be16(cmd
->logout_cid
);
2521 hdr
->param2
= cpu_to_be16(conn
->sess
->sess_ops
->DefaultTime2Wait
);
2522 hdr
->param3
= cpu_to_be16(conn
->sess
->sess_ops
->DefaultTime2Retain
);
2524 if (conn
->conn_ops
->HeaderDigest
) {
2525 u32
*header_digest
= (u32
*)&cmd
->pdu
[ISCSI_HDR_LEN
];
2527 iscsit_do_crypto_hash_buf(&conn
->conn_tx_hash
, hdr
,
2528 ISCSI_HDR_LEN
, 0, NULL
, (u8
*)header_digest
);
2530 cmd
->tx_size
+= ISCSI_CRC_LEN
;
2531 pr_debug("Attaching CRC32C HeaderDigest to"
2532 " Async Message 0x%08x\n", *header_digest
);
2535 cmd
->iov_misc
[0].iov_base
= cmd
->pdu
;
2536 cmd
->iov_misc
[0].iov_len
= cmd
->tx_size
;
2537 cmd
->iov_misc_count
= 1;
2539 pr_debug("Sending Connection Dropped Async Message StatSN:"
2540 " 0x%08x, for CID: %hu on CID: %hu\n", cmd
->stat_sn
,
2541 cmd
->logout_cid
, conn
->cid
);
2545 static void iscsit_tx_thread_wait_for_tcp(struct iscsi_conn
*conn
)
2547 if ((conn
->sock
->sk
->sk_shutdown
& SEND_SHUTDOWN
) ||
2548 (conn
->sock
->sk
->sk_shutdown
& RCV_SHUTDOWN
)) {
2549 wait_for_completion_interruptible_timeout(
2550 &conn
->tx_half_close_comp
,
2551 ISCSI_TX_THREAD_TCP_TIMEOUT
* HZ
);
2556 iscsit_build_datain_pdu(struct iscsi_cmd
*cmd
, struct iscsi_conn
*conn
,
2557 struct iscsi_datain
*datain
, struct iscsi_data_rsp
*hdr
,
2560 hdr
->opcode
= ISCSI_OP_SCSI_DATA_IN
;
2561 hdr
->flags
= datain
->flags
;
2562 if (hdr
->flags
& ISCSI_FLAG_DATA_STATUS
) {
2563 if (cmd
->se_cmd
.se_cmd_flags
& SCF_OVERFLOW_BIT
) {
2564 hdr
->flags
|= ISCSI_FLAG_DATA_OVERFLOW
;
2565 hdr
->residual_count
= cpu_to_be32(cmd
->se_cmd
.residual_count
);
2566 } else if (cmd
->se_cmd
.se_cmd_flags
& SCF_UNDERFLOW_BIT
) {
2567 hdr
->flags
|= ISCSI_FLAG_DATA_UNDERFLOW
;
2568 hdr
->residual_count
= cpu_to_be32(cmd
->se_cmd
.residual_count
);
2571 hton24(hdr
->dlength
, datain
->length
);
2572 if (hdr
->flags
& ISCSI_FLAG_DATA_ACK
)
2573 int_to_scsilun(cmd
->se_cmd
.orig_fe_lun
,
2574 (struct scsi_lun
*)&hdr
->lun
);
2576 put_unaligned_le64(0xFFFFFFFFFFFFFFFFULL
, &hdr
->lun
);
2578 hdr
->itt
= cmd
->init_task_tag
;
2580 if (hdr
->flags
& ISCSI_FLAG_DATA_ACK
)
2581 hdr
->ttt
= cpu_to_be32(cmd
->targ_xfer_tag
);
2583 hdr
->ttt
= cpu_to_be32(0xFFFFFFFF);
2585 hdr
->statsn
= cpu_to_be32(cmd
->stat_sn
);
2587 hdr
->statsn
= cpu_to_be32(0xFFFFFFFF);
2589 hdr
->exp_cmdsn
= cpu_to_be32(conn
->sess
->exp_cmd_sn
);
2590 hdr
->max_cmdsn
= cpu_to_be32(conn
->sess
->max_cmd_sn
);
2591 hdr
->datasn
= cpu_to_be32(datain
->data_sn
);
2592 hdr
->offset
= cpu_to_be32(datain
->offset
);
2594 pr_debug("Built DataIN ITT: 0x%08x, StatSN: 0x%08x,"
2595 " DataSN: 0x%08x, Offset: %u, Length: %u, CID: %hu\n",
2596 cmd
->init_task_tag
, ntohl(hdr
->statsn
), ntohl(hdr
->datasn
),
2597 ntohl(hdr
->offset
), datain
->length
, conn
->cid
);
2600 static int iscsit_send_datain(struct iscsi_cmd
*cmd
, struct iscsi_conn
*conn
)
2602 struct iscsi_data_rsp
*hdr
= (struct iscsi_data_rsp
*)&cmd
->pdu
[0];
2603 struct iscsi_datain datain
;
2604 struct iscsi_datain_req
*dr
;
2606 u32 iov_count
= 0, tx_size
= 0;
2607 int eodr
= 0, ret
, iov_ret
;
2608 bool set_statsn
= false;
2610 memset(&datain
, 0, sizeof(struct iscsi_datain
));
2611 dr
= iscsit_get_datain_values(cmd
, &datain
);
2613 pr_err("iscsit_get_datain_values failed for ITT: 0x%08x\n",
2614 cmd
->init_task_tag
);
2618 * Be paranoid and double check the logic for now.
2620 if ((datain
.offset
+ datain
.length
) > cmd
->se_cmd
.data_length
) {
2621 pr_err("Command ITT: 0x%08x, datain.offset: %u and"
2622 " datain.length: %u exceeds cmd->data_length: %u\n",
2623 cmd
->init_task_tag
, datain
.offset
, datain
.length
,
2624 cmd
->se_cmd
.data_length
);
2628 spin_lock_bh(&conn
->sess
->session_stats_lock
);
2629 conn
->sess
->tx_data_octets
+= datain
.length
;
2630 if (conn
->sess
->se_sess
->se_node_acl
) {
2631 spin_lock(&conn
->sess
->se_sess
->se_node_acl
->stats_lock
);
2632 conn
->sess
->se_sess
->se_node_acl
->read_bytes
+= datain
.length
;
2633 spin_unlock(&conn
->sess
->se_sess
->se_node_acl
->stats_lock
);
2635 spin_unlock_bh(&conn
->sess
->session_stats_lock
);
2637 * Special case for successfully execution w/ both DATAIN
2640 if ((datain
.flags
& ISCSI_FLAG_DATA_STATUS
) &&
2641 (cmd
->se_cmd
.se_cmd_flags
& SCF_TRANSPORT_TASK_SENSE
))
2642 datain
.flags
&= ~ISCSI_FLAG_DATA_STATUS
;
2644 if ((dr
->dr_complete
== DATAIN_COMPLETE_NORMAL
) ||
2645 (dr
->dr_complete
== DATAIN_COMPLETE_CONNECTION_RECOVERY
)) {
2646 iscsit_increment_maxcmdsn(cmd
, conn
->sess
);
2647 cmd
->stat_sn
= conn
->stat_sn
++;
2649 } else if (dr
->dr_complete
==
2650 DATAIN_COMPLETE_WITHIN_COMMAND_RECOVERY
)
2654 iscsit_build_datain_pdu(cmd
, conn
, &datain
, hdr
, set_statsn
);
2656 iov
= &cmd
->iov_data
[0];
2657 iov
[iov_count
].iov_base
= cmd
->pdu
;
2658 iov
[iov_count
++].iov_len
= ISCSI_HDR_LEN
;
2659 tx_size
+= ISCSI_HDR_LEN
;
2661 if (conn
->conn_ops
->HeaderDigest
) {
2662 u32
*header_digest
= (u32
*)&cmd
->pdu
[ISCSI_HDR_LEN
];
2664 iscsit_do_crypto_hash_buf(&conn
->conn_tx_hash
, cmd
->pdu
,
2665 ISCSI_HDR_LEN
, 0, NULL
, (u8
*)header_digest
);
2667 iov
[0].iov_len
+= ISCSI_CRC_LEN
;
2668 tx_size
+= ISCSI_CRC_LEN
;
2670 pr_debug("Attaching CRC32 HeaderDigest"
2671 " for DataIN PDU 0x%08x\n", *header_digest
);
2674 iov_ret
= iscsit_map_iovec(cmd
, &cmd
->iov_data
[1],
2675 datain
.offset
, datain
.length
);
2679 iov_count
+= iov_ret
;
2680 tx_size
+= datain
.length
;
2682 cmd
->padding
= ((-datain
.length
) & 3);
2684 iov
[iov_count
].iov_base
= cmd
->pad_bytes
;
2685 iov
[iov_count
++].iov_len
= cmd
->padding
;
2686 tx_size
+= cmd
->padding
;
2688 pr_debug("Attaching %u padding bytes\n",
2691 if (conn
->conn_ops
->DataDigest
) {
2692 cmd
->data_crc
= iscsit_do_crypto_hash_sg(&conn
->conn_tx_hash
, cmd
,
2693 datain
.offset
, datain
.length
, cmd
->padding
, cmd
->pad_bytes
);
2695 iov
[iov_count
].iov_base
= &cmd
->data_crc
;
2696 iov
[iov_count
++].iov_len
= ISCSI_CRC_LEN
;
2697 tx_size
+= ISCSI_CRC_LEN
;
2699 pr_debug("Attached CRC32C DataDigest %d bytes, crc"
2700 " 0x%08x\n", datain
.length
+cmd
->padding
, cmd
->data_crc
);
2703 cmd
->iov_data_count
= iov_count
;
2704 cmd
->tx_size
= tx_size
;
2706 /* sendpage is preferred but can't insert markers */
2707 if (!conn
->conn_ops
->IFMarker
)
2708 ret
= iscsit_fe_sendpage_sg(cmd
, conn
);
2710 ret
= iscsit_send_tx_data(cmd
, conn
, 0);
2712 iscsit_unmap_iovec(cmd
);
2715 iscsit_tx_thread_wait_for_tcp(conn
);
2719 if (dr
->dr_complete
) {
2720 eodr
= (cmd
->se_cmd
.se_cmd_flags
& SCF_TRANSPORT_TASK_SENSE
) ?
2722 iscsit_free_datain_req(cmd
, dr
);
2729 iscsit_build_logout_rsp(struct iscsi_cmd
*cmd
, struct iscsi_conn
*conn
,
2730 struct iscsi_logout_rsp
*hdr
)
2732 struct iscsi_conn
*logout_conn
= NULL
;
2733 struct iscsi_conn_recovery
*cr
= NULL
;
2734 struct iscsi_session
*sess
= conn
->sess
;
2736 * The actual shutting down of Sessions and/or Connections
2737 * for CLOSESESSION and CLOSECONNECTION Logout Requests
2738 * is done in scsi_logout_post_handler().
2740 switch (cmd
->logout_reason
) {
2741 case ISCSI_LOGOUT_REASON_CLOSE_SESSION
:
2742 pr_debug("iSCSI session logout successful, setting"
2743 " logout response to ISCSI_LOGOUT_SUCCESS.\n");
2744 cmd
->logout_response
= ISCSI_LOGOUT_SUCCESS
;
2746 case ISCSI_LOGOUT_REASON_CLOSE_CONNECTION
:
2747 if (cmd
->logout_response
== ISCSI_LOGOUT_CID_NOT_FOUND
)
2750 * For CLOSECONNECTION logout requests carrying
2751 * a matching logout CID -> local CID, the reference
2752 * for the local CID will have been incremented in
2753 * iscsi_logout_closeconnection().
2755 * For CLOSECONNECTION logout requests carrying
2756 * a different CID than the connection it arrived
2757 * on, the connection responding to cmd->logout_cid
2758 * is stopped in iscsit_logout_post_handler_diffcid().
2761 pr_debug("iSCSI CID: %hu logout on CID: %hu"
2762 " successful.\n", cmd
->logout_cid
, conn
->cid
);
2763 cmd
->logout_response
= ISCSI_LOGOUT_SUCCESS
;
2765 case ISCSI_LOGOUT_REASON_RECOVERY
:
2766 if ((cmd
->logout_response
== ISCSI_LOGOUT_RECOVERY_UNSUPPORTED
) ||
2767 (cmd
->logout_response
== ISCSI_LOGOUT_CLEANUP_FAILED
))
2770 * If the connection is still active from our point of view
2771 * force connection recovery to occur.
2773 logout_conn
= iscsit_get_conn_from_cid_rcfr(sess
,
2776 iscsit_connection_reinstatement_rcfr(logout_conn
);
2777 iscsit_dec_conn_usage_count(logout_conn
);
2780 cr
= iscsit_get_inactive_connection_recovery_entry(
2781 conn
->sess
, cmd
->logout_cid
);
2783 pr_err("Unable to locate CID: %hu for"
2784 " REMOVECONNFORRECOVERY Logout Request.\n",
2786 cmd
->logout_response
= ISCSI_LOGOUT_CID_NOT_FOUND
;
2790 iscsit_discard_cr_cmds_by_expstatsn(cr
, cmd
->exp_stat_sn
);
2792 pr_debug("iSCSI REMOVECONNFORRECOVERY logout"
2793 " for recovery for CID: %hu on CID: %hu successful.\n",
2794 cmd
->logout_cid
, conn
->cid
);
2795 cmd
->logout_response
= ISCSI_LOGOUT_SUCCESS
;
2798 pr_err("Unknown cmd->logout_reason: 0x%02x\n",
2799 cmd
->logout_reason
);
2803 hdr
->opcode
= ISCSI_OP_LOGOUT_RSP
;
2804 hdr
->flags
|= ISCSI_FLAG_CMD_FINAL
;
2805 hdr
->response
= cmd
->logout_response
;
2806 hdr
->itt
= cmd
->init_task_tag
;
2807 cmd
->stat_sn
= conn
->stat_sn
++;
2808 hdr
->statsn
= cpu_to_be32(cmd
->stat_sn
);
2810 iscsit_increment_maxcmdsn(cmd
, conn
->sess
);
2811 hdr
->exp_cmdsn
= cpu_to_be32(conn
->sess
->exp_cmd_sn
);
2812 hdr
->max_cmdsn
= cpu_to_be32(conn
->sess
->max_cmd_sn
);
2814 pr_debug("Built Logout Response ITT: 0x%08x StatSN:"
2815 " 0x%08x Response: 0x%02x CID: %hu on CID: %hu\n",
2816 cmd
->init_task_tag
, cmd
->stat_sn
, hdr
->response
,
2817 cmd
->logout_cid
, conn
->cid
);
2821 EXPORT_SYMBOL(iscsit_build_logout_rsp
);
2824 iscsit_send_logout(struct iscsi_cmd
*cmd
, struct iscsi_conn
*conn
)
2827 int niov
= 0, tx_size
, rc
;
2829 rc
= iscsit_build_logout_rsp(cmd
, conn
,
2830 (struct iscsi_logout_rsp
*)&cmd
->pdu
[0]);
2834 tx_size
= ISCSI_HDR_LEN
;
2835 iov
= &cmd
->iov_misc
[0];
2836 iov
[niov
].iov_base
= cmd
->pdu
;
2837 iov
[niov
++].iov_len
= ISCSI_HDR_LEN
;
2839 if (conn
->conn_ops
->HeaderDigest
) {
2840 u32
*header_digest
= (u32
*)&cmd
->pdu
[ISCSI_HDR_LEN
];
2842 iscsit_do_crypto_hash_buf(&conn
->conn_tx_hash
, &cmd
->pdu
[0],
2843 ISCSI_HDR_LEN
, 0, NULL
, (u8
*)header_digest
);
2845 iov
[0].iov_len
+= ISCSI_CRC_LEN
;
2846 tx_size
+= ISCSI_CRC_LEN
;
2847 pr_debug("Attaching CRC32C HeaderDigest to"
2848 " Logout Response 0x%08x\n", *header_digest
);
2850 cmd
->iov_misc_count
= niov
;
2851 cmd
->tx_size
= tx_size
;
2857 iscsit_build_nopin_rsp(struct iscsi_cmd
*cmd
, struct iscsi_conn
*conn
,
2858 struct iscsi_nopin
*hdr
, bool nopout_response
)
2860 hdr
->opcode
= ISCSI_OP_NOOP_IN
;
2861 hdr
->flags
|= ISCSI_FLAG_CMD_FINAL
;
2862 hton24(hdr
->dlength
, cmd
->buf_ptr_size
);
2863 if (nopout_response
)
2864 put_unaligned_le64(0xFFFFFFFFFFFFFFFFULL
, &hdr
->lun
);
2865 hdr
->itt
= cmd
->init_task_tag
;
2866 hdr
->ttt
= cpu_to_be32(cmd
->targ_xfer_tag
);
2867 cmd
->stat_sn
= (nopout_response
) ? conn
->stat_sn
++ :
2869 hdr
->statsn
= cpu_to_be32(cmd
->stat_sn
);
2871 if (nopout_response
)
2872 iscsit_increment_maxcmdsn(cmd
, conn
->sess
);
2874 hdr
->exp_cmdsn
= cpu_to_be32(conn
->sess
->exp_cmd_sn
);
2875 hdr
->max_cmdsn
= cpu_to_be32(conn
->sess
->max_cmd_sn
);
2877 pr_debug("Built NOPIN %s Response ITT: 0x%08x, TTT: 0x%08x,"
2878 " StatSN: 0x%08x, Length %u\n", (nopout_response
) ?
2879 "Solicitied" : "Unsolicitied", cmd
->init_task_tag
,
2880 cmd
->targ_xfer_tag
, cmd
->stat_sn
, cmd
->buf_ptr_size
);
2882 EXPORT_SYMBOL(iscsit_build_nopin_rsp
);
2885 * Unsolicited NOPIN, either requesting a response or not.
2887 static int iscsit_send_unsolicited_nopin(
2888 struct iscsi_cmd
*cmd
,
2889 struct iscsi_conn
*conn
,
2892 struct iscsi_nopin
*hdr
= (struct iscsi_nopin
*)&cmd
->pdu
[0];
2893 int tx_size
= ISCSI_HDR_LEN
, ret
;
2895 iscsit_build_nopin_rsp(cmd
, conn
, hdr
, false);
2897 if (conn
->conn_ops
->HeaderDigest
) {
2898 u32
*header_digest
= (u32
*)&cmd
->pdu
[ISCSI_HDR_LEN
];
2900 iscsit_do_crypto_hash_buf(&conn
->conn_tx_hash
, hdr
,
2901 ISCSI_HDR_LEN
, 0, NULL
, (u8
*)header_digest
);
2903 tx_size
+= ISCSI_CRC_LEN
;
2904 pr_debug("Attaching CRC32C HeaderDigest to"
2905 " NopIN 0x%08x\n", *header_digest
);
2908 cmd
->iov_misc
[0].iov_base
= cmd
->pdu
;
2909 cmd
->iov_misc
[0].iov_len
= tx_size
;
2910 cmd
->iov_misc_count
= 1;
2911 cmd
->tx_size
= tx_size
;
2913 pr_debug("Sending Unsolicited NOPIN TTT: 0x%08x StatSN:"
2914 " 0x%08x CID: %hu\n", hdr
->ttt
, cmd
->stat_sn
, conn
->cid
);
2916 ret
= iscsit_send_tx_data(cmd
, conn
, 1);
2918 iscsit_tx_thread_wait_for_tcp(conn
);
2922 spin_lock_bh(&cmd
->istate_lock
);
2923 cmd
->i_state
= want_response
?
2924 ISTATE_SENT_NOPIN_WANT_RESPONSE
: ISTATE_SENT_STATUS
;
2925 spin_unlock_bh(&cmd
->istate_lock
);
2931 iscsit_send_nopin(struct iscsi_cmd
*cmd
, struct iscsi_conn
*conn
)
2933 struct iscsi_nopin
*hdr
= (struct iscsi_nopin
*)&cmd
->pdu
[0];
2936 int niov
= 0, tx_size
;
2938 iscsit_build_nopin_rsp(cmd
, conn
, hdr
, true);
2940 tx_size
= ISCSI_HDR_LEN
;
2941 iov
= &cmd
->iov_misc
[0];
2942 iov
[niov
].iov_base
= cmd
->pdu
;
2943 iov
[niov
++].iov_len
= ISCSI_HDR_LEN
;
2945 if (conn
->conn_ops
->HeaderDigest
) {
2946 u32
*header_digest
= (u32
*)&cmd
->pdu
[ISCSI_HDR_LEN
];
2948 iscsit_do_crypto_hash_buf(&conn
->conn_tx_hash
, hdr
,
2949 ISCSI_HDR_LEN
, 0, NULL
, (u8
*)header_digest
);
2951 iov
[0].iov_len
+= ISCSI_CRC_LEN
;
2952 tx_size
+= ISCSI_CRC_LEN
;
2953 pr_debug("Attaching CRC32C HeaderDigest"
2954 " to NopIn 0x%08x\n", *header_digest
);
2958 * NOPOUT Ping Data is attached to struct iscsi_cmd->buf_ptr.
2959 * NOPOUT DataSegmentLength is at struct iscsi_cmd->buf_ptr_size.
2961 if (cmd
->buf_ptr_size
) {
2962 iov
[niov
].iov_base
= cmd
->buf_ptr
;
2963 iov
[niov
++].iov_len
= cmd
->buf_ptr_size
;
2964 tx_size
+= cmd
->buf_ptr_size
;
2966 pr_debug("Echoing back %u bytes of ping"
2967 " data.\n", cmd
->buf_ptr_size
);
2969 padding
= ((-cmd
->buf_ptr_size
) & 3);
2971 iov
[niov
].iov_base
= &cmd
->pad_bytes
;
2972 iov
[niov
++].iov_len
= padding
;
2974 pr_debug("Attaching %u additional"
2975 " padding bytes.\n", padding
);
2977 if (conn
->conn_ops
->DataDigest
) {
2978 iscsit_do_crypto_hash_buf(&conn
->conn_tx_hash
,
2979 cmd
->buf_ptr
, cmd
->buf_ptr_size
,
2980 padding
, (u8
*)&cmd
->pad_bytes
,
2981 (u8
*)&cmd
->data_crc
);
2983 iov
[niov
].iov_base
= &cmd
->data_crc
;
2984 iov
[niov
++].iov_len
= ISCSI_CRC_LEN
;
2985 tx_size
+= ISCSI_CRC_LEN
;
2986 pr_debug("Attached DataDigest for %u"
2987 " bytes of ping data, CRC 0x%08x\n",
2988 cmd
->buf_ptr_size
, cmd
->data_crc
);
2992 cmd
->iov_misc_count
= niov
;
2993 cmd
->tx_size
= tx_size
;
2998 static int iscsit_send_r2t(
2999 struct iscsi_cmd
*cmd
,
3000 struct iscsi_conn
*conn
)
3003 struct iscsi_r2t
*r2t
;
3004 struct iscsi_r2t_rsp
*hdr
;
3007 r2t
= iscsit_get_r2t_from_list(cmd
);
3011 hdr
= (struct iscsi_r2t_rsp
*) cmd
->pdu
;
3012 memset(hdr
, 0, ISCSI_HDR_LEN
);
3013 hdr
->opcode
= ISCSI_OP_R2T
;
3014 hdr
->flags
|= ISCSI_FLAG_CMD_FINAL
;
3015 int_to_scsilun(cmd
->se_cmd
.orig_fe_lun
,
3016 (struct scsi_lun
*)&hdr
->lun
);
3017 hdr
->itt
= cmd
->init_task_tag
;
3018 spin_lock_bh(&conn
->sess
->ttt_lock
);
3019 r2t
->targ_xfer_tag
= conn
->sess
->targ_xfer_tag
++;
3020 if (r2t
->targ_xfer_tag
== 0xFFFFFFFF)
3021 r2t
->targ_xfer_tag
= conn
->sess
->targ_xfer_tag
++;
3022 spin_unlock_bh(&conn
->sess
->ttt_lock
);
3023 hdr
->ttt
= cpu_to_be32(r2t
->targ_xfer_tag
);
3024 hdr
->statsn
= cpu_to_be32(conn
->stat_sn
);
3025 hdr
->exp_cmdsn
= cpu_to_be32(conn
->sess
->exp_cmd_sn
);
3026 hdr
->max_cmdsn
= cpu_to_be32(conn
->sess
->max_cmd_sn
);
3027 hdr
->r2tsn
= cpu_to_be32(r2t
->r2t_sn
);
3028 hdr
->data_offset
= cpu_to_be32(r2t
->offset
);
3029 hdr
->data_length
= cpu_to_be32(r2t
->xfer_len
);
3031 cmd
->iov_misc
[0].iov_base
= cmd
->pdu
;
3032 cmd
->iov_misc
[0].iov_len
= ISCSI_HDR_LEN
;
3033 tx_size
+= ISCSI_HDR_LEN
;
3035 if (conn
->conn_ops
->HeaderDigest
) {
3036 u32
*header_digest
= (u32
*)&cmd
->pdu
[ISCSI_HDR_LEN
];
3038 iscsit_do_crypto_hash_buf(&conn
->conn_tx_hash
, hdr
,
3039 ISCSI_HDR_LEN
, 0, NULL
, (u8
*)header_digest
);
3041 cmd
->iov_misc
[0].iov_len
+= ISCSI_CRC_LEN
;
3042 tx_size
+= ISCSI_CRC_LEN
;
3043 pr_debug("Attaching CRC32 HeaderDigest for R2T"
3044 " PDU 0x%08x\n", *header_digest
);
3047 pr_debug("Built %sR2T, ITT: 0x%08x, TTT: 0x%08x, StatSN:"
3048 " 0x%08x, R2TSN: 0x%08x, Offset: %u, DDTL: %u, CID: %hu\n",
3049 (!r2t
->recovery_r2t
) ? "" : "Recovery ", cmd
->init_task_tag
,
3050 r2t
->targ_xfer_tag
, ntohl(hdr
->statsn
), r2t
->r2t_sn
,
3051 r2t
->offset
, r2t
->xfer_len
, conn
->cid
);
3053 cmd
->iov_misc_count
= 1;
3054 cmd
->tx_size
= tx_size
;
3056 spin_lock_bh(&cmd
->r2t_lock
);
3058 spin_unlock_bh(&cmd
->r2t_lock
);
3060 ret
= iscsit_send_tx_data(cmd
, conn
, 1);
3062 iscsit_tx_thread_wait_for_tcp(conn
);
3066 spin_lock_bh(&cmd
->dataout_timeout_lock
);
3067 iscsit_start_dataout_timer(cmd
, conn
);
3068 spin_unlock_bh(&cmd
->dataout_timeout_lock
);
3074 * @recovery: If called from iscsi_task_reassign_complete_write() for
3075 * connection recovery.
3077 int iscsit_build_r2ts_for_cmd(
3078 struct iscsi_conn
*conn
,
3079 struct iscsi_cmd
*cmd
,
3083 u32 offset
= 0, xfer_len
= 0;
3085 spin_lock_bh(&cmd
->r2t_lock
);
3086 if (cmd
->cmd_flags
& ICF_SENT_LAST_R2T
) {
3087 spin_unlock_bh(&cmd
->r2t_lock
);
3091 if (conn
->sess
->sess_ops
->DataSequenceInOrder
&&
3093 cmd
->r2t_offset
= max(cmd
->r2t_offset
, cmd
->write_data_done
);
3095 while (cmd
->outstanding_r2ts
< conn
->sess
->sess_ops
->MaxOutstandingR2T
) {
3096 if (conn
->sess
->sess_ops
->DataSequenceInOrder
) {
3097 offset
= cmd
->r2t_offset
;
3099 if (first_r2t
&& recovery
) {
3100 int new_data_end
= offset
+
3101 conn
->sess
->sess_ops
->MaxBurstLength
-
3102 cmd
->next_burst_len
;
3104 if (new_data_end
> cmd
->se_cmd
.data_length
)
3105 xfer_len
= cmd
->se_cmd
.data_length
- offset
;
3108 conn
->sess
->sess_ops
->MaxBurstLength
-
3109 cmd
->next_burst_len
;
3111 int new_data_end
= offset
+
3112 conn
->sess
->sess_ops
->MaxBurstLength
;
3114 if (new_data_end
> cmd
->se_cmd
.data_length
)
3115 xfer_len
= cmd
->se_cmd
.data_length
- offset
;
3117 xfer_len
= conn
->sess
->sess_ops
->MaxBurstLength
;
3119 cmd
->r2t_offset
+= xfer_len
;
3121 if (cmd
->r2t_offset
== cmd
->se_cmd
.data_length
)
3122 cmd
->cmd_flags
|= ICF_SENT_LAST_R2T
;
3124 struct iscsi_seq
*seq
;
3126 seq
= iscsit_get_seq_holder_for_r2t(cmd
);
3128 spin_unlock_bh(&cmd
->r2t_lock
);
3132 offset
= seq
->offset
;
3133 xfer_len
= seq
->xfer_len
;
3135 if (cmd
->seq_send_order
== cmd
->seq_count
)
3136 cmd
->cmd_flags
|= ICF_SENT_LAST_R2T
;
3138 cmd
->outstanding_r2ts
++;
3141 if (iscsit_add_r2t_to_list(cmd
, offset
, xfer_len
, 0, 0) < 0) {
3142 spin_unlock_bh(&cmd
->r2t_lock
);
3146 if (cmd
->cmd_flags
& ICF_SENT_LAST_R2T
)
3149 spin_unlock_bh(&cmd
->r2t_lock
);
3154 void iscsit_build_rsp_pdu(struct iscsi_cmd
*cmd
, struct iscsi_conn
*conn
,
3155 bool inc_stat_sn
, struct iscsi_scsi_rsp
*hdr
)
3158 cmd
->stat_sn
= conn
->stat_sn
++;
3160 spin_lock_bh(&conn
->sess
->session_stats_lock
);
3161 conn
->sess
->rsp_pdus
++;
3162 spin_unlock_bh(&conn
->sess
->session_stats_lock
);
3164 memset(hdr
, 0, ISCSI_HDR_LEN
);
3165 hdr
->opcode
= ISCSI_OP_SCSI_CMD_RSP
;
3166 hdr
->flags
|= ISCSI_FLAG_CMD_FINAL
;
3167 if (cmd
->se_cmd
.se_cmd_flags
& SCF_OVERFLOW_BIT
) {
3168 hdr
->flags
|= ISCSI_FLAG_CMD_OVERFLOW
;
3169 hdr
->residual_count
= cpu_to_be32(cmd
->se_cmd
.residual_count
);
3170 } else if (cmd
->se_cmd
.se_cmd_flags
& SCF_UNDERFLOW_BIT
) {
3171 hdr
->flags
|= ISCSI_FLAG_CMD_UNDERFLOW
;
3172 hdr
->residual_count
= cpu_to_be32(cmd
->se_cmd
.residual_count
);
3174 hdr
->response
= cmd
->iscsi_response
;
3175 hdr
->cmd_status
= cmd
->se_cmd
.scsi_status
;
3176 hdr
->itt
= cmd
->init_task_tag
;
3177 hdr
->statsn
= cpu_to_be32(cmd
->stat_sn
);
3179 iscsit_increment_maxcmdsn(cmd
, conn
->sess
);
3180 hdr
->exp_cmdsn
= cpu_to_be32(conn
->sess
->exp_cmd_sn
);
3181 hdr
->max_cmdsn
= cpu_to_be32(conn
->sess
->max_cmd_sn
);
3183 pr_debug("Built SCSI Response, ITT: 0x%08x, StatSN: 0x%08x,"
3184 " Response: 0x%02x, SAM Status: 0x%02x, CID: %hu\n",
3185 cmd
->init_task_tag
, cmd
->stat_sn
, cmd
->se_cmd
.scsi_status
,
3186 cmd
->se_cmd
.scsi_status
, conn
->cid
);
3188 EXPORT_SYMBOL(iscsit_build_rsp_pdu
);
3190 static int iscsit_send_response(struct iscsi_cmd
*cmd
, struct iscsi_conn
*conn
)
3192 struct iscsi_scsi_rsp
*hdr
= (struct iscsi_scsi_rsp
*)&cmd
->pdu
[0];
3194 u32 padding
= 0, tx_size
= 0;
3196 bool inc_stat_sn
= (cmd
->i_state
== ISTATE_SEND_STATUS
);
3198 iscsit_build_rsp_pdu(cmd
, conn
, inc_stat_sn
, hdr
);
3200 iov
= &cmd
->iov_misc
[0];
3201 iov
[iov_count
].iov_base
= cmd
->pdu
;
3202 iov
[iov_count
++].iov_len
= ISCSI_HDR_LEN
;
3203 tx_size
+= ISCSI_HDR_LEN
;
3206 * Attach SENSE DATA payload to iSCSI Response PDU
3208 if (cmd
->se_cmd
.sense_buffer
&&
3209 ((cmd
->se_cmd
.se_cmd_flags
& SCF_TRANSPORT_TASK_SENSE
) ||
3210 (cmd
->se_cmd
.se_cmd_flags
& SCF_EMULATED_TASK_SENSE
))) {
3211 put_unaligned_be16(cmd
->se_cmd
.scsi_sense_length
, cmd
->sense_buffer
);
3212 cmd
->se_cmd
.scsi_sense_length
+= sizeof (__be16
);
3214 padding
= -(cmd
->se_cmd
.scsi_sense_length
) & 3;
3215 hton24(hdr
->dlength
, (u32
)cmd
->se_cmd
.scsi_sense_length
);
3216 iov
[iov_count
].iov_base
= cmd
->sense_buffer
;
3217 iov
[iov_count
++].iov_len
=
3218 (cmd
->se_cmd
.scsi_sense_length
+ padding
);
3219 tx_size
+= cmd
->se_cmd
.scsi_sense_length
;
3222 memset(cmd
->sense_buffer
+
3223 cmd
->se_cmd
.scsi_sense_length
, 0, padding
);
3225 pr_debug("Adding %u bytes of padding to"
3226 " SENSE.\n", padding
);
3229 if (conn
->conn_ops
->DataDigest
) {
3230 iscsit_do_crypto_hash_buf(&conn
->conn_tx_hash
,
3232 (cmd
->se_cmd
.scsi_sense_length
+ padding
),
3233 0, NULL
, (u8
*)&cmd
->data_crc
);
3235 iov
[iov_count
].iov_base
= &cmd
->data_crc
;
3236 iov
[iov_count
++].iov_len
= ISCSI_CRC_LEN
;
3237 tx_size
+= ISCSI_CRC_LEN
;
3239 pr_debug("Attaching CRC32 DataDigest for"
3240 " SENSE, %u bytes CRC 0x%08x\n",
3241 (cmd
->se_cmd
.scsi_sense_length
+ padding
),
3245 pr_debug("Attaching SENSE DATA: %u bytes to iSCSI"
3247 cmd
->se_cmd
.scsi_sense_length
);
3250 if (conn
->conn_ops
->HeaderDigest
) {
3251 u32
*header_digest
= (u32
*)&cmd
->pdu
[ISCSI_HDR_LEN
];
3253 iscsit_do_crypto_hash_buf(&conn
->conn_tx_hash
, cmd
->pdu
,
3254 ISCSI_HDR_LEN
, 0, NULL
, (u8
*)header_digest
);
3256 iov
[0].iov_len
+= ISCSI_CRC_LEN
;
3257 tx_size
+= ISCSI_CRC_LEN
;
3258 pr_debug("Attaching CRC32 HeaderDigest for Response"
3259 " PDU 0x%08x\n", *header_digest
);
3262 cmd
->iov_misc_count
= iov_count
;
3263 cmd
->tx_size
= tx_size
;
3268 static u8
iscsit_convert_tcm_tmr_rsp(struct se_tmr_req
*se_tmr
)
3270 switch (se_tmr
->response
) {
3271 case TMR_FUNCTION_COMPLETE
:
3272 return ISCSI_TMF_RSP_COMPLETE
;
3273 case TMR_TASK_DOES_NOT_EXIST
:
3274 return ISCSI_TMF_RSP_NO_TASK
;
3275 case TMR_LUN_DOES_NOT_EXIST
:
3276 return ISCSI_TMF_RSP_NO_LUN
;
3277 case TMR_TASK_MGMT_FUNCTION_NOT_SUPPORTED
:
3278 return ISCSI_TMF_RSP_NOT_SUPPORTED
;
3279 case TMR_FUNCTION_REJECTED
:
3281 return ISCSI_TMF_RSP_REJECTED
;
3286 iscsit_build_task_mgt_rsp(struct iscsi_cmd
*cmd
, struct iscsi_conn
*conn
,
3287 struct iscsi_tm_rsp
*hdr
)
3289 struct se_tmr_req
*se_tmr
= cmd
->se_cmd
.se_tmr_req
;
3291 hdr
->opcode
= ISCSI_OP_SCSI_TMFUNC_RSP
;
3292 hdr
->flags
= ISCSI_FLAG_CMD_FINAL
;
3293 hdr
->response
= iscsit_convert_tcm_tmr_rsp(se_tmr
);
3294 hdr
->itt
= cmd
->init_task_tag
;
3295 cmd
->stat_sn
= conn
->stat_sn
++;
3296 hdr
->statsn
= cpu_to_be32(cmd
->stat_sn
);
3298 iscsit_increment_maxcmdsn(cmd
, conn
->sess
);
3299 hdr
->exp_cmdsn
= cpu_to_be32(conn
->sess
->exp_cmd_sn
);
3300 hdr
->max_cmdsn
= cpu_to_be32(conn
->sess
->max_cmd_sn
);
3302 pr_debug("Built Task Management Response ITT: 0x%08x,"
3303 " StatSN: 0x%08x, Response: 0x%02x, CID: %hu\n",
3304 cmd
->init_task_tag
, cmd
->stat_sn
, hdr
->response
, conn
->cid
);
3306 EXPORT_SYMBOL(iscsit_build_task_mgt_rsp
);
3309 iscsit_send_task_mgt_rsp(struct iscsi_cmd
*cmd
, struct iscsi_conn
*conn
)
3311 struct iscsi_tm_rsp
*hdr
= (struct iscsi_tm_rsp
*)&cmd
->pdu
[0];
3314 iscsit_build_task_mgt_rsp(cmd
, conn
, hdr
);
3316 cmd
->iov_misc
[0].iov_base
= cmd
->pdu
;
3317 cmd
->iov_misc
[0].iov_len
= ISCSI_HDR_LEN
;
3318 tx_size
+= ISCSI_HDR_LEN
;
3320 if (conn
->conn_ops
->HeaderDigest
) {
3321 u32
*header_digest
= (u32
*)&cmd
->pdu
[ISCSI_HDR_LEN
];
3323 iscsit_do_crypto_hash_buf(&conn
->conn_tx_hash
, hdr
,
3324 ISCSI_HDR_LEN
, 0, NULL
, (u8
*)header_digest
);
3326 cmd
->iov_misc
[0].iov_len
+= ISCSI_CRC_LEN
;
3327 tx_size
+= ISCSI_CRC_LEN
;
3328 pr_debug("Attaching CRC32 HeaderDigest for Task"
3329 " Mgmt Response PDU 0x%08x\n", *header_digest
);
3332 cmd
->iov_misc_count
= 1;
3333 cmd
->tx_size
= tx_size
;
3338 static bool iscsit_check_inaddr_any(struct iscsi_np
*np
)
3342 if (np
->np_sockaddr
.ss_family
== AF_INET6
) {
3343 const struct sockaddr_in6 sin6
= {
3344 .sin6_addr
= IN6ADDR_ANY_INIT
};
3345 struct sockaddr_in6
*sock_in6
=
3346 (struct sockaddr_in6
*)&np
->np_sockaddr
;
3348 if (!memcmp(sock_in6
->sin6_addr
.s6_addr
,
3349 sin6
.sin6_addr
.s6_addr
, 16))
3352 struct sockaddr_in
* sock_in
=
3353 (struct sockaddr_in
*)&np
->np_sockaddr
;
3355 if (sock_in
->sin_addr
.s_addr
== htonl(INADDR_ANY
))
3362 #define SENDTARGETS_BUF_LIMIT 32768U
3364 static int iscsit_build_sendtargets_response(struct iscsi_cmd
*cmd
)
3366 char *payload
= NULL
;
3367 struct iscsi_conn
*conn
= cmd
->conn
;
3368 struct iscsi_portal_group
*tpg
;
3369 struct iscsi_tiqn
*tiqn
;
3370 struct iscsi_tpg_np
*tpg_np
;
3371 int buffer_len
, end_of_buf
= 0, len
= 0, payload_len
= 0;
3372 unsigned char buf
[ISCSI_IQN_LEN
+12]; /* iqn + "TargetName=" + \0 */
3373 unsigned char *text_in
= cmd
->text_in_ptr
, *text_ptr
= NULL
;
3375 buffer_len
= max(conn
->conn_ops
->MaxRecvDataSegmentLength
,
3376 SENDTARGETS_BUF_LIMIT
);
3378 payload
= kzalloc(buffer_len
, GFP_KERNEL
);
3380 pr_err("Unable to allocate memory for sendtargets"
3385 * Locate pointer to iqn./eui. string for IFC_SENDTARGETS_SINGLE
3388 if (cmd
->cmd_flags
& IFC_SENDTARGETS_SINGLE
) {
3389 text_ptr
= strchr(text_in
, '=');
3391 pr_err("Unable to locate '=' string in text_in:"
3397 * Skip over '=' character..
3402 spin_lock(&tiqn_lock
);
3403 list_for_each_entry(tiqn
, &g_tiqn_list
, tiqn_list
) {
3404 if ((cmd
->cmd_flags
& IFC_SENDTARGETS_SINGLE
) &&
3405 strcmp(tiqn
->tiqn
, text_ptr
)) {
3409 len
= sprintf(buf
, "TargetName=%s", tiqn
->tiqn
);
3412 if ((len
+ payload_len
) > buffer_len
) {
3416 memcpy(payload
+ payload_len
, buf
, len
);
3419 spin_lock(&tiqn
->tiqn_tpg_lock
);
3420 list_for_each_entry(tpg
, &tiqn
->tiqn_tpg_list
, tpg_list
) {
3422 spin_lock(&tpg
->tpg_state_lock
);
3423 if ((tpg
->tpg_state
== TPG_STATE_FREE
) ||
3424 (tpg
->tpg_state
== TPG_STATE_INACTIVE
)) {
3425 spin_unlock(&tpg
->tpg_state_lock
);
3428 spin_unlock(&tpg
->tpg_state_lock
);
3430 spin_lock(&tpg
->tpg_np_lock
);
3431 list_for_each_entry(tpg_np
, &tpg
->tpg_gnp_list
,
3433 struct iscsi_np
*np
= tpg_np
->tpg_np
;
3434 bool inaddr_any
= iscsit_check_inaddr_any(np
);
3436 len
= sprintf(buf
, "TargetAddress="
3438 (inaddr_any
== false) ?
3439 np
->np_ip
: conn
->local_ip
,
3440 (inaddr_any
== false) ?
3441 np
->np_port
: conn
->local_port
,
3445 if ((len
+ payload_len
) > buffer_len
) {
3446 spin_unlock(&tpg
->tpg_np_lock
);
3447 spin_unlock(&tiqn
->tiqn_tpg_lock
);
3451 memcpy(payload
+ payload_len
, buf
, len
);
3454 spin_unlock(&tpg
->tpg_np_lock
);
3456 spin_unlock(&tiqn
->tiqn_tpg_lock
);
3461 if (cmd
->cmd_flags
& IFC_SENDTARGETS_SINGLE
)
3464 spin_unlock(&tiqn_lock
);
3466 cmd
->buf_ptr
= payload
;
3472 iscsit_build_text_rsp(struct iscsi_cmd
*cmd
, struct iscsi_conn
*conn
,
3473 struct iscsi_text_rsp
*hdr
)
3475 int text_length
, padding
;
3477 text_length
= iscsit_build_sendtargets_response(cmd
);
3478 if (text_length
< 0)
3481 hdr
->opcode
= ISCSI_OP_TEXT_RSP
;
3482 hdr
->flags
|= ISCSI_FLAG_CMD_FINAL
;
3483 padding
= ((-text_length
) & 3);
3484 hton24(hdr
->dlength
, text_length
);
3485 hdr
->itt
= cmd
->init_task_tag
;
3486 hdr
->ttt
= cpu_to_be32(cmd
->targ_xfer_tag
);
3487 cmd
->stat_sn
= conn
->stat_sn
++;
3488 hdr
->statsn
= cpu_to_be32(cmd
->stat_sn
);
3490 iscsit_increment_maxcmdsn(cmd
, conn
->sess
);
3491 hdr
->exp_cmdsn
= cpu_to_be32(conn
->sess
->exp_cmd_sn
);
3492 hdr
->max_cmdsn
= cpu_to_be32(conn
->sess
->max_cmd_sn
);
3494 pr_debug("Built Text Response: ITT: 0x%08x, StatSN: 0x%08x,"
3495 " Length: %u, CID: %hu\n", cmd
->init_task_tag
, cmd
->stat_sn
,
3496 text_length
, conn
->cid
);
3498 return text_length
+ padding
;
3500 EXPORT_SYMBOL(iscsit_build_text_rsp
);
3503 * FIXME: Add support for F_BIT and C_BIT when the length is longer than
3504 * MaxRecvDataSegmentLength.
3506 static int iscsit_send_text_rsp(
3507 struct iscsi_cmd
*cmd
,
3508 struct iscsi_conn
*conn
)
3510 struct iscsi_text_rsp
*hdr
= (struct iscsi_text_rsp
*)cmd
->pdu
;
3513 int text_length
, iov_count
= 0, rc
;
3515 rc
= iscsit_build_text_rsp(cmd
, conn
, hdr
);
3520 iov
= &cmd
->iov_misc
[0];
3521 iov
[iov_count
].iov_base
= cmd
->pdu
;
3522 iov
[iov_count
++].iov_len
= ISCSI_HDR_LEN
;
3523 iov
[iov_count
].iov_base
= cmd
->buf_ptr
;
3524 iov
[iov_count
++].iov_len
= text_length
;
3526 tx_size
+= (ISCSI_HDR_LEN
+ text_length
);
3528 if (conn
->conn_ops
->HeaderDigest
) {
3529 u32
*header_digest
= (u32
*)&cmd
->pdu
[ISCSI_HDR_LEN
];
3531 iscsit_do_crypto_hash_buf(&conn
->conn_tx_hash
, hdr
,
3532 ISCSI_HDR_LEN
, 0, NULL
, (u8
*)header_digest
);
3534 iov
[0].iov_len
+= ISCSI_CRC_LEN
;
3535 tx_size
+= ISCSI_CRC_LEN
;
3536 pr_debug("Attaching CRC32 HeaderDigest for"
3537 " Text Response PDU 0x%08x\n", *header_digest
);
3540 if (conn
->conn_ops
->DataDigest
) {
3541 iscsit_do_crypto_hash_buf(&conn
->conn_tx_hash
,
3542 cmd
->buf_ptr
, text_length
,
3543 0, NULL
, (u8
*)&cmd
->data_crc
);
3545 iov
[iov_count
].iov_base
= &cmd
->data_crc
;
3546 iov
[iov_count
++].iov_len
= ISCSI_CRC_LEN
;
3547 tx_size
+= ISCSI_CRC_LEN
;
3549 pr_debug("Attaching DataDigest for %u bytes of text"
3550 " data, CRC 0x%08x\n", text_length
,
3554 cmd
->iov_misc_count
= iov_count
;
3555 cmd
->tx_size
= tx_size
;
3561 iscsit_build_reject(struct iscsi_cmd
*cmd
, struct iscsi_conn
*conn
,
3562 struct iscsi_reject
*hdr
)
3564 hdr
->opcode
= ISCSI_OP_REJECT
;
3565 hdr
->reason
= cmd
->reject_reason
;
3566 hdr
->flags
|= ISCSI_FLAG_CMD_FINAL
;
3567 hton24(hdr
->dlength
, ISCSI_HDR_LEN
);
3568 hdr
->ffffffff
= cpu_to_be32(0xffffffff);
3569 cmd
->stat_sn
= conn
->stat_sn
++;
3570 hdr
->statsn
= cpu_to_be32(cmd
->stat_sn
);
3571 hdr
->exp_cmdsn
= cpu_to_be32(conn
->sess
->exp_cmd_sn
);
3572 hdr
->max_cmdsn
= cpu_to_be32(conn
->sess
->max_cmd_sn
);
3575 EXPORT_SYMBOL(iscsit_build_reject
);
3577 static int iscsit_send_reject(
3578 struct iscsi_cmd
*cmd
,
3579 struct iscsi_conn
*conn
)
3581 struct iscsi_reject
*hdr
= (struct iscsi_reject
*)&cmd
->pdu
[0];
3583 u32 iov_count
= 0, tx_size
;
3585 iscsit_build_reject(cmd
, conn
, hdr
);
3587 iov
= &cmd
->iov_misc
[0];
3588 iov
[iov_count
].iov_base
= cmd
->pdu
;
3589 iov
[iov_count
++].iov_len
= ISCSI_HDR_LEN
;
3590 iov
[iov_count
].iov_base
= cmd
->buf_ptr
;
3591 iov
[iov_count
++].iov_len
= ISCSI_HDR_LEN
;
3593 tx_size
= (ISCSI_HDR_LEN
+ ISCSI_HDR_LEN
);
3595 if (conn
->conn_ops
->HeaderDigest
) {
3596 u32
*header_digest
= (u32
*)&cmd
->pdu
[ISCSI_HDR_LEN
];
3598 iscsit_do_crypto_hash_buf(&conn
->conn_tx_hash
, hdr
,
3599 ISCSI_HDR_LEN
, 0, NULL
, (u8
*)header_digest
);
3601 iov
[0].iov_len
+= ISCSI_CRC_LEN
;
3602 tx_size
+= ISCSI_CRC_LEN
;
3603 pr_debug("Attaching CRC32 HeaderDigest for"
3604 " REJECT PDU 0x%08x\n", *header_digest
);
3607 if (conn
->conn_ops
->DataDigest
) {
3608 iscsit_do_crypto_hash_buf(&conn
->conn_tx_hash
, cmd
->buf_ptr
,
3609 ISCSI_HDR_LEN
, 0, NULL
, (u8
*)&cmd
->data_crc
);
3611 iov
[iov_count
].iov_base
= &cmd
->data_crc
;
3612 iov
[iov_count
++].iov_len
= ISCSI_CRC_LEN
;
3613 tx_size
+= ISCSI_CRC_LEN
;
3614 pr_debug("Attaching CRC32 DataDigest for REJECT"
3615 " PDU 0x%08x\n", cmd
->data_crc
);
3618 cmd
->iov_misc_count
= iov_count
;
3619 cmd
->tx_size
= tx_size
;
3621 pr_debug("Built Reject PDU StatSN: 0x%08x, Reason: 0x%02x,"
3622 " CID: %hu\n", ntohl(hdr
->statsn
), hdr
->reason
, conn
->cid
);
3627 void iscsit_thread_get_cpumask(struct iscsi_conn
*conn
)
3629 struct iscsi_thread_set
*ts
= conn
->thread_set
;
3632 * thread_id is assigned from iscsit_global->ts_bitmap from
3633 * within iscsi_thread_set.c:iscsi_allocate_thread_sets()
3635 * Here we use thread_id to determine which CPU that this
3636 * iSCSI connection's iscsi_thread_set will be scheduled to
3639 ord
= ts
->thread_id
% cpumask_weight(cpu_online_mask
);
3640 for_each_online_cpu(cpu
) {
3642 cpumask_set_cpu(cpu
, conn
->conn_cpumask
);
3647 * This should never be reached..
3650 cpumask_setall(conn
->conn_cpumask
);
3653 static inline void iscsit_thread_check_cpumask(
3654 struct iscsi_conn
*conn
,
3655 struct task_struct
*p
,
3660 * mode == 1 signals iscsi_target_tx_thread() usage.
3661 * mode == 0 signals iscsi_target_rx_thread() usage.
3664 if (!conn
->conn_tx_reset_cpumask
)
3666 conn
->conn_tx_reset_cpumask
= 0;
3668 if (!conn
->conn_rx_reset_cpumask
)
3670 conn
->conn_rx_reset_cpumask
= 0;
3673 * Update the CPU mask for this single kthread so that
3674 * both TX and RX kthreads are scheduled to run on the
3677 memset(buf
, 0, 128);
3678 cpumask_scnprintf(buf
, 128, conn
->conn_cpumask
);
3679 set_cpus_allowed_ptr(p
, conn
->conn_cpumask
);
3683 iscsit_immediate_queue(struct iscsi_conn
*conn
, struct iscsi_cmd
*cmd
, int state
)
3688 case ISTATE_SEND_R2T
:
3689 ret
= iscsit_send_r2t(cmd
, conn
);
3694 spin_lock_bh(&conn
->cmd_lock
);
3695 list_del(&cmd
->i_conn_node
);
3696 spin_unlock_bh(&conn
->cmd_lock
);
3698 iscsit_free_cmd(cmd
, false);
3700 case ISTATE_SEND_NOPIN_WANT_RESPONSE
:
3701 iscsit_mod_nopin_response_timer(conn
);
3702 ret
= iscsit_send_unsolicited_nopin(cmd
, conn
, 1);
3706 case ISTATE_SEND_NOPIN_NO_RESPONSE
:
3707 ret
= iscsit_send_unsolicited_nopin(cmd
, conn
, 0);
3712 pr_err("Unknown Opcode: 0x%02x ITT:"
3713 " 0x%08x, i_state: %d on CID: %hu\n",
3714 cmd
->iscsi_opcode
, cmd
->init_task_tag
, state
,
3726 iscsit_handle_immediate_queue(struct iscsi_conn
*conn
)
3728 struct iscsit_transport
*t
= conn
->conn_transport
;
3729 struct iscsi_queue_req
*qr
;
3730 struct iscsi_cmd
*cmd
;
3734 while ((qr
= iscsit_get_cmd_from_immediate_queue(conn
))) {
3735 atomic_set(&conn
->check_immediate_queue
, 0);
3738 kmem_cache_free(lio_qr_cache
, qr
);
3740 ret
= t
->iscsit_immediate_queue(conn
, cmd
, state
);
3749 iscsit_response_queue(struct iscsi_conn
*conn
, struct iscsi_cmd
*cmd
, int state
)
3755 case ISTATE_SEND_DATAIN
:
3756 ret
= iscsit_send_datain(cmd
, conn
);
3761 goto check_rsp_state
;
3762 else if (ret
== 1) {
3764 spin_lock_bh(&cmd
->istate_lock
);
3765 cmd
->i_state
= ISTATE_SENT_STATUS
;
3766 spin_unlock_bh(&cmd
->istate_lock
);
3768 if (atomic_read(&conn
->check_immediate_queue
))
3772 } else if (ret
== 2) {
3773 /* Still must send status,
3774 SCF_TRANSPORT_TASK_SENSE was set */
3775 spin_lock_bh(&cmd
->istate_lock
);
3776 cmd
->i_state
= ISTATE_SEND_STATUS
;
3777 spin_unlock_bh(&cmd
->istate_lock
);
3778 state
= ISTATE_SEND_STATUS
;
3779 goto check_rsp_state
;
3783 case ISTATE_SEND_STATUS
:
3784 case ISTATE_SEND_STATUS_RECOVERY
:
3785 ret
= iscsit_send_response(cmd
, conn
);
3787 case ISTATE_SEND_LOGOUTRSP
:
3788 ret
= iscsit_send_logout(cmd
, conn
);
3790 case ISTATE_SEND_ASYNCMSG
:
3791 ret
= iscsit_send_conn_drop_async_message(
3794 case ISTATE_SEND_NOPIN
:
3795 ret
= iscsit_send_nopin(cmd
, conn
);
3797 case ISTATE_SEND_REJECT
:
3798 ret
= iscsit_send_reject(cmd
, conn
);
3800 case ISTATE_SEND_TASKMGTRSP
:
3801 ret
= iscsit_send_task_mgt_rsp(cmd
, conn
);
3804 ret
= iscsit_tmr_post_handler(cmd
, conn
);
3806 iscsit_fall_back_to_erl0(conn
->sess
);
3808 case ISTATE_SEND_TEXTRSP
:
3809 ret
= iscsit_send_text_rsp(cmd
, conn
);
3812 pr_err("Unknown Opcode: 0x%02x ITT:"
3813 " 0x%08x, i_state: %d on CID: %hu\n",
3814 cmd
->iscsi_opcode
, cmd
->init_task_tag
,
3821 if (iscsit_send_tx_data(cmd
, conn
, 1) < 0) {
3822 iscsit_tx_thread_wait_for_tcp(conn
);
3823 iscsit_unmap_iovec(cmd
);
3826 iscsit_unmap_iovec(cmd
);
3829 case ISTATE_SEND_LOGOUTRSP
:
3830 if (!iscsit_logout_post_handler(cmd
, conn
))
3833 case ISTATE_SEND_STATUS
:
3834 case ISTATE_SEND_ASYNCMSG
:
3835 case ISTATE_SEND_NOPIN
:
3836 case ISTATE_SEND_STATUS_RECOVERY
:
3837 case ISTATE_SEND_TEXTRSP
:
3838 case ISTATE_SEND_TASKMGTRSP
:
3839 case ISTATE_SEND_REJECT
:
3840 spin_lock_bh(&cmd
->istate_lock
);
3841 cmd
->i_state
= ISTATE_SENT_STATUS
;
3842 spin_unlock_bh(&cmd
->istate_lock
);
3845 pr_err("Unknown Opcode: 0x%02x ITT:"
3846 " 0x%08x, i_state: %d on CID: %hu\n",
3847 cmd
->iscsi_opcode
, cmd
->init_task_tag
,
3848 cmd
->i_state
, conn
->cid
);
3852 if (atomic_read(&conn
->check_immediate_queue
))
3863 static int iscsit_handle_response_queue(struct iscsi_conn
*conn
)
3865 struct iscsit_transport
*t
= conn
->conn_transport
;
3866 struct iscsi_queue_req
*qr
;
3867 struct iscsi_cmd
*cmd
;
3871 while ((qr
= iscsit_get_cmd_from_response_queue(conn
))) {
3874 kmem_cache_free(lio_qr_cache
, qr
);
3876 ret
= t
->iscsit_response_queue(conn
, cmd
, state
);
3877 if (ret
== 1 || ret
< 0)
3884 int iscsi_target_tx_thread(void *arg
)
3887 struct iscsi_conn
*conn
;
3888 struct iscsi_thread_set
*ts
= arg
;
3890 * Allow ourselves to be interrupted by SIGINT so that a
3891 * connection recovery / failure event can be triggered externally.
3893 allow_signal(SIGINT
);
3896 conn
= iscsi_tx_thread_pre_handler(ts
);
3902 while (!kthread_should_stop()) {
3904 * Ensure that both TX and RX per connection kthreads
3905 * are scheduled to run on the same CPU.
3907 iscsit_thread_check_cpumask(conn
, current
, 1);
3909 wait_event_interruptible(conn
->queues_wq
,
3910 !iscsit_conn_all_queues_empty(conn
) ||
3911 ts
->status
== ISCSI_THREAD_SET_RESET
);
3913 if ((ts
->status
== ISCSI_THREAD_SET_RESET
) ||
3914 signal_pending(current
))
3918 ret
= iscsit_handle_immediate_queue(conn
);
3922 ret
= iscsit_handle_response_queue(conn
);
3925 else if (ret
== -EAGAIN
)
3932 iscsit_take_action_for_connection_exit(conn
);
3938 static int iscsi_target_rx_opcode(struct iscsi_conn
*conn
, unsigned char *buf
)
3940 struct iscsi_hdr
*hdr
= (struct iscsi_hdr
*)buf
;
3941 struct iscsi_cmd
*cmd
;
3944 switch (hdr
->opcode
& ISCSI_OPCODE_MASK
) {
3945 case ISCSI_OP_SCSI_CMD
:
3946 cmd
= iscsit_allocate_cmd(conn
, GFP_KERNEL
);
3950 ret
= iscsit_handle_scsi_cmd(conn
, cmd
, buf
);
3952 case ISCSI_OP_SCSI_DATA_OUT
:
3953 ret
= iscsit_handle_data_out(conn
, buf
);
3955 case ISCSI_OP_NOOP_OUT
:
3957 if (hdr
->ttt
== cpu_to_be32(0xFFFFFFFF)) {
3958 cmd
= iscsit_allocate_cmd(conn
, GFP_KERNEL
);
3962 ret
= iscsit_handle_nop_out(conn
, cmd
, buf
);
3964 case ISCSI_OP_SCSI_TMFUNC
:
3965 cmd
= iscsit_allocate_cmd(conn
, GFP_KERNEL
);
3969 ret
= iscsit_handle_task_mgt_cmd(conn
, cmd
, buf
);
3972 cmd
= iscsit_allocate_cmd(conn
, GFP_KERNEL
);
3976 ret
= iscsit_handle_text_cmd(conn
, cmd
, buf
);
3978 case ISCSI_OP_LOGOUT
:
3979 cmd
= iscsit_allocate_cmd(conn
, GFP_KERNEL
);
3983 ret
= iscsit_handle_logout_cmd(conn
, cmd
, buf
);
3985 wait_for_completion_timeout(&conn
->conn_logout_comp
,
3986 SECONDS_FOR_LOGOUT_COMP
* HZ
);
3988 case ISCSI_OP_SNACK
:
3989 ret
= iscsit_handle_snack(conn
, buf
);
3992 pr_err("Got unknown iSCSI OpCode: 0x%02x\n", hdr
->opcode
);
3993 if (!conn
->sess
->sess_ops
->ErrorRecoveryLevel
) {
3994 pr_err("Cannot recover from unknown"
3995 " opcode while ERL=0, closing iSCSI connection.\n");
3998 if (!conn
->conn_ops
->OFMarker
) {
3999 pr_err("Unable to recover from unknown"
4000 " opcode while OFMarker=No, closing iSCSI"
4004 if (iscsit_recover_from_unknown_opcode(conn
) < 0) {
4005 pr_err("Unable to recover from unknown"
4006 " opcode, closing iSCSI connection.\n");
4014 return iscsit_add_reject(conn
, ISCSI_REASON_BOOKMARK_NO_RESOURCES
, buf
);
4017 int iscsi_target_rx_thread(void *arg
)
4020 u8 buffer
[ISCSI_HDR_LEN
], opcode
;
4021 u32 checksum
= 0, digest
= 0;
4022 struct iscsi_conn
*conn
= NULL
;
4023 struct iscsi_thread_set
*ts
= arg
;
4026 * Allow ourselves to be interrupted by SIGINT so that a
4027 * connection recovery / failure event can be triggered externally.
4029 allow_signal(SIGINT
);
4032 conn
= iscsi_rx_thread_pre_handler(ts
);
4036 if (conn
->conn_transport
->transport_type
== ISCSI_INFINIBAND
) {
4037 struct completion comp
;
4040 init_completion(&comp
);
4041 rc
= wait_for_completion_interruptible(&comp
);
4048 while (!kthread_should_stop()) {
4050 * Ensure that both TX and RX per connection kthreads
4051 * are scheduled to run on the same CPU.
4053 iscsit_thread_check_cpumask(conn
, current
, 0);
4055 memset(buffer
, 0, ISCSI_HDR_LEN
);
4056 memset(&iov
, 0, sizeof(struct kvec
));
4058 iov
.iov_base
= buffer
;
4059 iov
.iov_len
= ISCSI_HDR_LEN
;
4061 ret
= rx_data(conn
, &iov
, 1, ISCSI_HDR_LEN
);
4062 if (ret
!= ISCSI_HDR_LEN
) {
4063 iscsit_rx_thread_wait_for_tcp(conn
);
4067 if (conn
->conn_ops
->HeaderDigest
) {
4068 iov
.iov_base
= &digest
;
4069 iov
.iov_len
= ISCSI_CRC_LEN
;
4071 ret
= rx_data(conn
, &iov
, 1, ISCSI_CRC_LEN
);
4072 if (ret
!= ISCSI_CRC_LEN
) {
4073 iscsit_rx_thread_wait_for_tcp(conn
);
4077 iscsit_do_crypto_hash_buf(&conn
->conn_rx_hash
,
4078 buffer
, ISCSI_HDR_LEN
,
4079 0, NULL
, (u8
*)&checksum
);
4081 if (digest
!= checksum
) {
4082 pr_err("HeaderDigest CRC32C failed,"
4083 " received 0x%08x, computed 0x%08x\n",
4086 * Set the PDU to 0xff so it will intentionally
4087 * hit default in the switch below.
4089 memset(buffer
, 0xff, ISCSI_HDR_LEN
);
4090 spin_lock_bh(&conn
->sess
->session_stats_lock
);
4091 conn
->sess
->conn_digest_errors
++;
4092 spin_unlock_bh(&conn
->sess
->session_stats_lock
);
4094 pr_debug("Got HeaderDigest CRC32C"
4095 " 0x%08x\n", checksum
);
4099 if (conn
->conn_state
== TARG_CONN_STATE_IN_LOGOUT
)
4102 opcode
= buffer
[0] & ISCSI_OPCODE_MASK
;
4104 if (conn
->sess
->sess_ops
->SessionType
&&
4105 ((!(opcode
& ISCSI_OP_TEXT
)) ||
4106 (!(opcode
& ISCSI_OP_LOGOUT
)))) {
4107 pr_err("Received illegal iSCSI Opcode: 0x%02x"
4108 " while in Discovery Session, rejecting.\n", opcode
);
4109 iscsit_add_reject(conn
, ISCSI_REASON_PROTOCOL_ERROR
,
4114 ret
= iscsi_target_rx_opcode(conn
, buffer
);
4120 if (!signal_pending(current
))
4121 atomic_set(&conn
->transport_failed
, 1);
4122 iscsit_take_action_for_connection_exit(conn
);
4128 static void iscsit_release_commands_from_conn(struct iscsi_conn
*conn
)
4130 struct iscsi_cmd
*cmd
= NULL
, *cmd_tmp
= NULL
;
4131 struct iscsi_session
*sess
= conn
->sess
;
4133 * We expect this function to only ever be called from either RX or TX
4134 * thread context via iscsit_close_connection() once the other context
4135 * has been reset -> returned sleeping pre-handler state.
4137 spin_lock_bh(&conn
->cmd_lock
);
4138 list_for_each_entry_safe(cmd
, cmd_tmp
, &conn
->conn_cmd_list
, i_conn_node
) {
4140 list_del(&cmd
->i_conn_node
);
4141 spin_unlock_bh(&conn
->cmd_lock
);
4143 iscsit_increment_maxcmdsn(cmd
, sess
);
4145 iscsit_free_cmd(cmd
, true);
4147 spin_lock_bh(&conn
->cmd_lock
);
4149 spin_unlock_bh(&conn
->cmd_lock
);
4152 static void iscsit_stop_timers_for_cmds(
4153 struct iscsi_conn
*conn
)
4155 struct iscsi_cmd
*cmd
;
4157 spin_lock_bh(&conn
->cmd_lock
);
4158 list_for_each_entry(cmd
, &conn
->conn_cmd_list
, i_conn_node
) {
4159 if (cmd
->data_direction
== DMA_TO_DEVICE
)
4160 iscsit_stop_dataout_timer(cmd
);
4162 spin_unlock_bh(&conn
->cmd_lock
);
4165 int iscsit_close_connection(
4166 struct iscsi_conn
*conn
)
4168 int conn_logout
= (conn
->conn_state
== TARG_CONN_STATE_IN_LOGOUT
);
4169 struct iscsi_session
*sess
= conn
->sess
;
4171 pr_debug("Closing iSCSI connection CID %hu on SID:"
4172 " %u\n", conn
->cid
, sess
->sid
);
4174 * Always up conn_logout_comp just in case the RX Thread is sleeping
4175 * and the logout response never got sent because the connection
4178 complete(&conn
->conn_logout_comp
);
4180 iscsi_release_thread_set(conn
);
4182 iscsit_stop_timers_for_cmds(conn
);
4183 iscsit_stop_nopin_response_timer(conn
);
4184 iscsit_stop_nopin_timer(conn
);
4185 iscsit_free_queue_reqs_for_conn(conn
);
4188 * During Connection recovery drop unacknowledged out of order
4189 * commands for this connection, and prepare the other commands
4192 * During normal operation clear the out of order commands (but
4193 * do not free the struct iscsi_ooo_cmdsn's) and release all
4194 * struct iscsi_cmds.
4196 if (atomic_read(&conn
->connection_recovery
)) {
4197 iscsit_discard_unacknowledged_ooo_cmdsns_for_conn(conn
);
4198 iscsit_prepare_cmds_for_realligance(conn
);
4200 iscsit_clear_ooo_cmdsns_for_conn(conn
);
4201 iscsit_release_commands_from_conn(conn
);
4205 * Handle decrementing session or connection usage count if
4206 * a logout response was not able to be sent because the
4207 * connection failed. Fall back to Session Recovery here.
4209 if (atomic_read(&conn
->conn_logout_remove
)) {
4210 if (conn
->conn_logout_reason
== ISCSI_LOGOUT_REASON_CLOSE_SESSION
) {
4211 iscsit_dec_conn_usage_count(conn
);
4212 iscsit_dec_session_usage_count(sess
);
4214 if (conn
->conn_logout_reason
== ISCSI_LOGOUT_REASON_CLOSE_CONNECTION
)
4215 iscsit_dec_conn_usage_count(conn
);
4217 atomic_set(&conn
->conn_logout_remove
, 0);
4218 atomic_set(&sess
->session_reinstatement
, 0);
4219 atomic_set(&sess
->session_fall_back_to_erl0
, 1);
4222 spin_lock_bh(&sess
->conn_lock
);
4223 list_del(&conn
->conn_list
);
4226 * Attempt to let the Initiator know this connection failed by
4227 * sending an Connection Dropped Async Message on another
4228 * active connection.
4230 if (atomic_read(&conn
->connection_recovery
))
4231 iscsit_build_conn_drop_async_message(conn
);
4233 spin_unlock_bh(&sess
->conn_lock
);
4236 * If connection reinstatement is being performed on this connection,
4237 * up the connection reinstatement semaphore that is being blocked on
4238 * in iscsit_cause_connection_reinstatement().
4240 spin_lock_bh(&conn
->state_lock
);
4241 if (atomic_read(&conn
->sleep_on_conn_wait_comp
)) {
4242 spin_unlock_bh(&conn
->state_lock
);
4243 complete(&conn
->conn_wait_comp
);
4244 wait_for_completion(&conn
->conn_post_wait_comp
);
4245 spin_lock_bh(&conn
->state_lock
);
4249 * If connection reinstatement is being performed on this connection
4250 * by receiving a REMOVECONNFORRECOVERY logout request, up the
4251 * connection wait rcfr semaphore that is being blocked on
4252 * an iscsit_connection_reinstatement_rcfr().
4254 if (atomic_read(&conn
->connection_wait_rcfr
)) {
4255 spin_unlock_bh(&conn
->state_lock
);
4256 complete(&conn
->conn_wait_rcfr_comp
);
4257 wait_for_completion(&conn
->conn_post_wait_comp
);
4258 spin_lock_bh(&conn
->state_lock
);
4260 atomic_set(&conn
->connection_reinstatement
, 1);
4261 spin_unlock_bh(&conn
->state_lock
);
4264 * If any other processes are accessing this connection pointer we
4265 * must wait until they have completed.
4267 iscsit_check_conn_usage_count(conn
);
4269 if (conn
->conn_rx_hash
.tfm
)
4270 crypto_free_hash(conn
->conn_rx_hash
.tfm
);
4271 if (conn
->conn_tx_hash
.tfm
)
4272 crypto_free_hash(conn
->conn_tx_hash
.tfm
);
4274 if (conn
->conn_cpumask
)
4275 free_cpumask_var(conn
->conn_cpumask
);
4277 kfree(conn
->conn_ops
);
4278 conn
->conn_ops
= NULL
;
4281 sock_release(conn
->sock
);
4283 if (conn
->conn_transport
->iscsit_free_conn
)
4284 conn
->conn_transport
->iscsit_free_conn(conn
);
4286 iscsit_put_transport(conn
->conn_transport
);
4288 conn
->thread_set
= NULL
;
4290 pr_debug("Moving to TARG_CONN_STATE_FREE.\n");
4291 conn
->conn_state
= TARG_CONN_STATE_FREE
;
4294 spin_lock_bh(&sess
->conn_lock
);
4295 atomic_dec(&sess
->nconn
);
4296 pr_debug("Decremented iSCSI connection count to %hu from node:"
4297 " %s\n", atomic_read(&sess
->nconn
),
4298 sess
->sess_ops
->InitiatorName
);
4300 * Make sure that if one connection fails in an non ERL=2 iSCSI
4301 * Session that they all fail.
4303 if ((sess
->sess_ops
->ErrorRecoveryLevel
!= 2) && !conn_logout
&&
4304 !atomic_read(&sess
->session_logout
))
4305 atomic_set(&sess
->session_fall_back_to_erl0
, 1);
4308 * If this was not the last connection in the session, and we are
4309 * performing session reinstatement or falling back to ERL=0, call
4310 * iscsit_stop_session() without sleeping to shutdown the other
4311 * active connections.
4313 if (atomic_read(&sess
->nconn
)) {
4314 if (!atomic_read(&sess
->session_reinstatement
) &&
4315 !atomic_read(&sess
->session_fall_back_to_erl0
)) {
4316 spin_unlock_bh(&sess
->conn_lock
);
4319 if (!atomic_read(&sess
->session_stop_active
)) {
4320 atomic_set(&sess
->session_stop_active
, 1);
4321 spin_unlock_bh(&sess
->conn_lock
);
4322 iscsit_stop_session(sess
, 0, 0);
4325 spin_unlock_bh(&sess
->conn_lock
);
4330 * If this was the last connection in the session and one of the
4331 * following is occurring:
4333 * Session Reinstatement is not being performed, and are falling back
4334 * to ERL=0 call iscsit_close_session().
4336 * Session Logout was requested. iscsit_close_session() will be called
4339 * Session Continuation is not being performed, start the Time2Retain
4340 * handler and check if sleep_on_sess_wait_sem is active.
4342 if (!atomic_read(&sess
->session_reinstatement
) &&
4343 atomic_read(&sess
->session_fall_back_to_erl0
)) {
4344 spin_unlock_bh(&sess
->conn_lock
);
4345 target_put_session(sess
->se_sess
);
4348 } else if (atomic_read(&sess
->session_logout
)) {
4349 pr_debug("Moving to TARG_SESS_STATE_FREE.\n");
4350 sess
->session_state
= TARG_SESS_STATE_FREE
;
4351 spin_unlock_bh(&sess
->conn_lock
);
4353 if (atomic_read(&sess
->sleep_on_sess_wait_comp
))
4354 complete(&sess
->session_wait_comp
);
4358 pr_debug("Moving to TARG_SESS_STATE_FAILED.\n");
4359 sess
->session_state
= TARG_SESS_STATE_FAILED
;
4361 if (!atomic_read(&sess
->session_continuation
)) {
4362 spin_unlock_bh(&sess
->conn_lock
);
4363 iscsit_start_time2retain_handler(sess
);
4365 spin_unlock_bh(&sess
->conn_lock
);
4367 if (atomic_read(&sess
->sleep_on_sess_wait_comp
))
4368 complete(&sess
->session_wait_comp
);
4372 spin_unlock_bh(&sess
->conn_lock
);
4377 int iscsit_close_session(struct iscsi_session
*sess
)
4379 struct iscsi_portal_group
*tpg
= ISCSI_TPG_S(sess
);
4380 struct se_portal_group
*se_tpg
= &tpg
->tpg_se_tpg
;
4382 if (atomic_read(&sess
->nconn
)) {
4383 pr_err("%d connection(s) still exist for iSCSI session"
4384 " to %s\n", atomic_read(&sess
->nconn
),
4385 sess
->sess_ops
->InitiatorName
);
4389 spin_lock_bh(&se_tpg
->session_lock
);
4390 atomic_set(&sess
->session_logout
, 1);
4391 atomic_set(&sess
->session_reinstatement
, 1);
4392 iscsit_stop_time2retain_timer(sess
);
4393 spin_unlock_bh(&se_tpg
->session_lock
);
4396 * transport_deregister_session_configfs() will clear the
4397 * struct se_node_acl->nacl_sess pointer now as a iscsi_np process context
4398 * can be setting it again with __transport_register_session() in
4399 * iscsi_post_login_handler() again after the iscsit_stop_session()
4400 * completes in iscsi_np context.
4402 transport_deregister_session_configfs(sess
->se_sess
);
4405 * If any other processes are accessing this session pointer we must
4406 * wait until they have completed. If we are in an interrupt (the
4407 * time2retain handler) and contain and active session usage count we
4408 * restart the timer and exit.
4410 if (!in_interrupt()) {
4411 if (iscsit_check_session_usage_count(sess
) == 1)
4412 iscsit_stop_session(sess
, 1, 1);
4414 if (iscsit_check_session_usage_count(sess
) == 2) {
4415 atomic_set(&sess
->session_logout
, 0);
4416 iscsit_start_time2retain_handler(sess
);
4421 transport_deregister_session(sess
->se_sess
);
4423 if (sess
->sess_ops
->ErrorRecoveryLevel
== 2)
4424 iscsit_free_connection_recovery_entires(sess
);
4426 iscsit_free_all_ooo_cmdsns(sess
);
4428 spin_lock_bh(&se_tpg
->session_lock
);
4429 pr_debug("Moving to TARG_SESS_STATE_FREE.\n");
4430 sess
->session_state
= TARG_SESS_STATE_FREE
;
4431 pr_debug("Released iSCSI session from node: %s\n",
4432 sess
->sess_ops
->InitiatorName
);
4435 tpg
->tpg_tiqn
->tiqn_nsessions
--;
4437 pr_debug("Decremented number of active iSCSI Sessions on"
4438 " iSCSI TPG: %hu to %u\n", tpg
->tpgt
, tpg
->nsessions
);
4440 spin_lock(&sess_idr_lock
);
4441 idr_remove(&sess_idr
, sess
->session_index
);
4442 spin_unlock(&sess_idr_lock
);
4444 kfree(sess
->sess_ops
);
4445 sess
->sess_ops
= NULL
;
4446 spin_unlock_bh(&se_tpg
->session_lock
);
4452 static void iscsit_logout_post_handler_closesession(
4453 struct iscsi_conn
*conn
)
4455 struct iscsi_session
*sess
= conn
->sess
;
4457 iscsi_set_thread_clear(conn
, ISCSI_CLEAR_TX_THREAD
);
4458 iscsi_set_thread_set_signal(conn
, ISCSI_SIGNAL_TX_THREAD
);
4460 atomic_set(&conn
->conn_logout_remove
, 0);
4461 complete(&conn
->conn_logout_comp
);
4463 iscsit_dec_conn_usage_count(conn
);
4464 iscsit_stop_session(sess
, 1, 1);
4465 iscsit_dec_session_usage_count(sess
);
4466 target_put_session(sess
->se_sess
);
4469 static void iscsit_logout_post_handler_samecid(
4470 struct iscsi_conn
*conn
)
4472 iscsi_set_thread_clear(conn
, ISCSI_CLEAR_TX_THREAD
);
4473 iscsi_set_thread_set_signal(conn
, ISCSI_SIGNAL_TX_THREAD
);
4475 atomic_set(&conn
->conn_logout_remove
, 0);
4476 complete(&conn
->conn_logout_comp
);
4478 iscsit_cause_connection_reinstatement(conn
, 1);
4479 iscsit_dec_conn_usage_count(conn
);
4482 static void iscsit_logout_post_handler_diffcid(
4483 struct iscsi_conn
*conn
,
4486 struct iscsi_conn
*l_conn
;
4487 struct iscsi_session
*sess
= conn
->sess
;
4492 spin_lock_bh(&sess
->conn_lock
);
4493 list_for_each_entry(l_conn
, &sess
->sess_conn_list
, conn_list
) {
4494 if (l_conn
->cid
== cid
) {
4495 iscsit_inc_conn_usage_count(l_conn
);
4499 spin_unlock_bh(&sess
->conn_lock
);
4505 l_conn
->sock
->ops
->shutdown(l_conn
->sock
, RCV_SHUTDOWN
);
4507 spin_lock_bh(&l_conn
->state_lock
);
4508 pr_debug("Moving to TARG_CONN_STATE_IN_LOGOUT.\n");
4509 l_conn
->conn_state
= TARG_CONN_STATE_IN_LOGOUT
;
4510 spin_unlock_bh(&l_conn
->state_lock
);
4512 iscsit_cause_connection_reinstatement(l_conn
, 1);
4513 iscsit_dec_conn_usage_count(l_conn
);
4517 * Return of 0 causes the TX thread to restart.
4519 int iscsit_logout_post_handler(
4520 struct iscsi_cmd
*cmd
,
4521 struct iscsi_conn
*conn
)
4525 switch (cmd
->logout_reason
) {
4526 case ISCSI_LOGOUT_REASON_CLOSE_SESSION
:
4527 switch (cmd
->logout_response
) {
4528 case ISCSI_LOGOUT_SUCCESS
:
4529 case ISCSI_LOGOUT_CLEANUP_FAILED
:
4531 iscsit_logout_post_handler_closesession(conn
);
4536 case ISCSI_LOGOUT_REASON_CLOSE_CONNECTION
:
4537 if (conn
->cid
== cmd
->logout_cid
) {
4538 switch (cmd
->logout_response
) {
4539 case ISCSI_LOGOUT_SUCCESS
:
4540 case ISCSI_LOGOUT_CLEANUP_FAILED
:
4542 iscsit_logout_post_handler_samecid(conn
);
4547 switch (cmd
->logout_response
) {
4548 case ISCSI_LOGOUT_SUCCESS
:
4549 iscsit_logout_post_handler_diffcid(conn
,
4552 case ISCSI_LOGOUT_CID_NOT_FOUND
:
4553 case ISCSI_LOGOUT_CLEANUP_FAILED
:
4560 case ISCSI_LOGOUT_REASON_RECOVERY
:
4561 switch (cmd
->logout_response
) {
4562 case ISCSI_LOGOUT_SUCCESS
:
4563 case ISCSI_LOGOUT_CID_NOT_FOUND
:
4564 case ISCSI_LOGOUT_RECOVERY_UNSUPPORTED
:
4565 case ISCSI_LOGOUT_CLEANUP_FAILED
:
4577 EXPORT_SYMBOL(iscsit_logout_post_handler
);
4579 void iscsit_fail_session(struct iscsi_session
*sess
)
4581 struct iscsi_conn
*conn
;
4583 spin_lock_bh(&sess
->conn_lock
);
4584 list_for_each_entry(conn
, &sess
->sess_conn_list
, conn_list
) {
4585 pr_debug("Moving to TARG_CONN_STATE_CLEANUP_WAIT.\n");
4586 conn
->conn_state
= TARG_CONN_STATE_CLEANUP_WAIT
;
4588 spin_unlock_bh(&sess
->conn_lock
);
4590 pr_debug("Moving to TARG_SESS_STATE_FAILED.\n");
4591 sess
->session_state
= TARG_SESS_STATE_FAILED
;
4594 int iscsit_free_session(struct iscsi_session
*sess
)
4596 u16 conn_count
= atomic_read(&sess
->nconn
);
4597 struct iscsi_conn
*conn
, *conn_tmp
= NULL
;
4600 spin_lock_bh(&sess
->conn_lock
);
4601 atomic_set(&sess
->sleep_on_sess_wait_comp
, 1);
4603 list_for_each_entry_safe(conn
, conn_tmp
, &sess
->sess_conn_list
,
4605 if (conn_count
== 0)
4608 if (list_is_last(&conn
->conn_list
, &sess
->sess_conn_list
)) {
4611 iscsit_inc_conn_usage_count(conn_tmp
);
4614 iscsit_inc_conn_usage_count(conn
);
4616 spin_unlock_bh(&sess
->conn_lock
);
4617 iscsit_cause_connection_reinstatement(conn
, 1);
4618 spin_lock_bh(&sess
->conn_lock
);
4620 iscsit_dec_conn_usage_count(conn
);
4622 iscsit_dec_conn_usage_count(conn_tmp
);
4627 if (atomic_read(&sess
->nconn
)) {
4628 spin_unlock_bh(&sess
->conn_lock
);
4629 wait_for_completion(&sess
->session_wait_comp
);
4631 spin_unlock_bh(&sess
->conn_lock
);
4633 target_put_session(sess
->se_sess
);
4637 void iscsit_stop_session(
4638 struct iscsi_session
*sess
,
4640 int connection_sleep
)
4642 u16 conn_count
= atomic_read(&sess
->nconn
);
4643 struct iscsi_conn
*conn
, *conn_tmp
= NULL
;
4646 spin_lock_bh(&sess
->conn_lock
);
4648 atomic_set(&sess
->sleep_on_sess_wait_comp
, 1);
4650 if (connection_sleep
) {
4651 list_for_each_entry_safe(conn
, conn_tmp
, &sess
->sess_conn_list
,
4653 if (conn_count
== 0)
4656 if (list_is_last(&conn
->conn_list
, &sess
->sess_conn_list
)) {
4659 iscsit_inc_conn_usage_count(conn_tmp
);
4662 iscsit_inc_conn_usage_count(conn
);
4664 spin_unlock_bh(&sess
->conn_lock
);
4665 iscsit_cause_connection_reinstatement(conn
, 1);
4666 spin_lock_bh(&sess
->conn_lock
);
4668 iscsit_dec_conn_usage_count(conn
);
4670 iscsit_dec_conn_usage_count(conn_tmp
);
4674 list_for_each_entry(conn
, &sess
->sess_conn_list
, conn_list
)
4675 iscsit_cause_connection_reinstatement(conn
, 0);
4678 if (session_sleep
&& atomic_read(&sess
->nconn
)) {
4679 spin_unlock_bh(&sess
->conn_lock
);
4680 wait_for_completion(&sess
->session_wait_comp
);
4682 spin_unlock_bh(&sess
->conn_lock
);
4685 int iscsit_release_sessions_for_tpg(struct iscsi_portal_group
*tpg
, int force
)
4687 struct iscsi_session
*sess
;
4688 struct se_portal_group
*se_tpg
= &tpg
->tpg_se_tpg
;
4689 struct se_session
*se_sess
, *se_sess_tmp
;
4690 int session_count
= 0;
4692 spin_lock_bh(&se_tpg
->session_lock
);
4693 if (tpg
->nsessions
&& !force
) {
4694 spin_unlock_bh(&se_tpg
->session_lock
);
4698 list_for_each_entry_safe(se_sess
, se_sess_tmp
, &se_tpg
->tpg_sess_list
,
4700 sess
= (struct iscsi_session
*)se_sess
->fabric_sess_ptr
;
4702 spin_lock(&sess
->conn_lock
);
4703 if (atomic_read(&sess
->session_fall_back_to_erl0
) ||
4704 atomic_read(&sess
->session_logout
) ||
4705 (sess
->time2retain_timer_flags
& ISCSI_TF_EXPIRED
)) {
4706 spin_unlock(&sess
->conn_lock
);
4709 atomic_set(&sess
->session_reinstatement
, 1);
4710 spin_unlock(&sess
->conn_lock
);
4711 spin_unlock_bh(&se_tpg
->session_lock
);
4713 iscsit_free_session(sess
);
4714 spin_lock_bh(&se_tpg
->session_lock
);
4718 spin_unlock_bh(&se_tpg
->session_lock
);
4720 pr_debug("Released %d iSCSI Session(s) from Target Portal"
4721 " Group: %hu\n", session_count
, tpg
->tpgt
);
4725 MODULE_DESCRIPTION("iSCSI-Target Driver for mainline target infrastructure");
4726 MODULE_VERSION("4.1.x");
4727 MODULE_AUTHOR("nab@Linux-iSCSI.org");
4728 MODULE_LICENSE("GPL");
4730 module_init(iscsi_target_init_module
);
4731 module_exit(iscsi_target_cleanup_module
);