1 /*******************************************************************************
2 * This file contains the iSCSI Target specific utility functions.
4 * \u00a9 Copyright 2007-2011 RisingTide Systems LLC.
6 * Licensed to the Linux Foundation under the General Public License (GPL) version 2.
8 * Author: Nicholas A. Bellinger <nab@linux-iscsi.org>
10 * This program is free software; you can redistribute it and/or modify
11 * it under the terms of the GNU General Public License as published by
12 * the Free Software Foundation; either version 2 of the License, or
13 * (at your option) any later version.
15 * This program is distributed in the hope that it will be useful,
16 * but WITHOUT ANY WARRANTY; without even the implied warranty of
17 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
18 * GNU General Public License for more details.
19 ******************************************************************************/
21 #include <linux/list.h>
22 #include <scsi/scsi_tcq.h>
23 #include <scsi/iscsi_proto.h>
24 #include <target/target_core_base.h>
25 #include <target/target_core_transport.h>
26 #include <target/target_core_tmr.h>
27 #include <target/target_core_fabric_ops.h>
28 #include <target/target_core_configfs.h>
30 #include "iscsi_target_core.h"
31 #include "iscsi_target_parameters.h"
32 #include "iscsi_target_seq_pdu_list.h"
33 #include "iscsi_target_datain_values.h"
34 #include "iscsi_target_erl0.h"
35 #include "iscsi_target_erl1.h"
36 #include "iscsi_target_erl2.h"
37 #include "iscsi_target_tpg.h"
38 #include "iscsi_target_tq.h"
39 #include "iscsi_target_util.h"
40 #include "iscsi_target.h"
42 #define PRINT_BUFF(buff, len) \
46 pr_debug("%d:\n", __LINE__); \
47 for (zzz = 0; zzz < len; zzz++) { \
48 if (zzz % 16 == 0) { \
51 pr_debug("%4i: ", zzz); \
53 pr_debug("%02x ", (unsigned char) (buff)[zzz]); \
59 extern struct list_head g_tiqn_list;
60 extern spinlock_t tiqn_lock;
63 * Called with cmd->r2t_lock held.
65 int iscsit_add_r2t_to_list(
66 struct iscsi_cmd *cmd,
72 struct iscsi_r2t *r2t;
74 r2t = kmem_cache_zalloc(lio_r2t_cache, GFP_ATOMIC);
76 pr_err("Unable to allocate memory for struct iscsi_r2t.\n");
79 INIT_LIST_HEAD(&r2t->r2t_list);
81 r2t->recovery_r2t = recovery;
82 r2t->r2t_sn = (!r2t_sn) ? cmd->r2t_sn++ : r2t_sn;
84 r2t->xfer_len = xfer_len;
85 list_add_tail(&r2t->r2t_list, &cmd->cmd_r2t_list);
86 spin_unlock_bh(&cmd->r2t_lock);
88 iscsit_add_cmd_to_immediate_queue(cmd, cmd->conn, ISTATE_SEND_R2T);
90 spin_lock_bh(&cmd->r2t_lock);
94 struct iscsi_r2t *iscsit_get_r2t_for_eos(
95 struct iscsi_cmd *cmd,
99 struct iscsi_r2t *r2t;
101 spin_lock_bh(&cmd->r2t_lock);
102 list_for_each_entry(r2t, &cmd->cmd_r2t_list, r2t_list) {
103 if ((r2t->offset <= offset) &&
104 (r2t->offset + r2t->xfer_len) >= (offset + length)) {
105 spin_unlock_bh(&cmd->r2t_lock);
109 spin_unlock_bh(&cmd->r2t_lock);
111 pr_err("Unable to locate R2T for Offset: %u, Length:"
112 " %u\n", offset, length);
116 struct iscsi_r2t *iscsit_get_r2t_from_list(struct iscsi_cmd *cmd)
118 struct iscsi_r2t *r2t;
120 spin_lock_bh(&cmd->r2t_lock);
121 list_for_each_entry(r2t, &cmd->cmd_r2t_list, r2t_list) {
122 if (!r2t->sent_r2t) {
123 spin_unlock_bh(&cmd->r2t_lock);
127 spin_unlock_bh(&cmd->r2t_lock);
129 pr_err("Unable to locate next R2T to send for ITT:"
130 " 0x%08x.\n", cmd->init_task_tag);
135 * Called with cmd->r2t_lock held.
137 void iscsit_free_r2t(struct iscsi_r2t *r2t, struct iscsi_cmd *cmd)
139 list_del(&r2t->r2t_list);
140 kmem_cache_free(lio_r2t_cache, r2t);
143 void iscsit_free_r2ts_from_list(struct iscsi_cmd *cmd)
145 struct iscsi_r2t *r2t, *r2t_tmp;
147 spin_lock_bh(&cmd->r2t_lock);
148 list_for_each_entry_safe(r2t, r2t_tmp, &cmd->cmd_r2t_list, r2t_list)
149 iscsit_free_r2t(r2t, cmd);
150 spin_unlock_bh(&cmd->r2t_lock);
154 * May be called from software interrupt (timer) context for allocating
157 struct iscsi_cmd *iscsit_allocate_cmd(struct iscsi_conn *conn, gfp_t gfp_mask)
159 struct iscsi_cmd *cmd;
161 cmd = kmem_cache_zalloc(lio_cmd_cache, gfp_mask);
163 pr_err("Unable to allocate memory for struct iscsi_cmd.\n");
168 INIT_LIST_HEAD(&cmd->i_list);
169 INIT_LIST_HEAD(&cmd->datain_list);
170 INIT_LIST_HEAD(&cmd->cmd_r2t_list);
171 init_completion(&cmd->reject_comp);
172 spin_lock_init(&cmd->datain_lock);
173 spin_lock_init(&cmd->dataout_timeout_lock);
174 spin_lock_init(&cmd->istate_lock);
175 spin_lock_init(&cmd->error_lock);
176 spin_lock_init(&cmd->r2t_lock);
182 * Called from iscsi_handle_scsi_cmd()
184 struct iscsi_cmd *iscsit_allocate_se_cmd(
185 struct iscsi_conn *conn,
190 struct iscsi_cmd *cmd;
191 struct se_cmd *se_cmd;
194 cmd = iscsit_allocate_cmd(conn, GFP_KERNEL);
198 cmd->data_direction = data_direction;
199 cmd->data_length = data_length;
201 * Figure out the SAM Task Attribute for the incoming SCSI CDB
203 if ((iscsi_task_attr == ISCSI_ATTR_UNTAGGED) ||
204 (iscsi_task_attr == ISCSI_ATTR_SIMPLE))
205 sam_task_attr = MSG_SIMPLE_TAG;
206 else if (iscsi_task_attr == ISCSI_ATTR_ORDERED)
207 sam_task_attr = MSG_ORDERED_TAG;
208 else if (iscsi_task_attr == ISCSI_ATTR_HEAD_OF_QUEUE)
209 sam_task_attr = MSG_HEAD_TAG;
210 else if (iscsi_task_attr == ISCSI_ATTR_ACA)
211 sam_task_attr = MSG_ACA_TAG;
213 pr_debug("Unknown iSCSI Task Attribute: 0x%02x, using"
214 " MSG_SIMPLE_TAG\n", iscsi_task_attr);
215 sam_task_attr = MSG_SIMPLE_TAG;
218 se_cmd = &cmd->se_cmd;
220 * Initialize struct se_cmd descriptor from target_core_mod infrastructure
222 transport_init_se_cmd(se_cmd, &lio_target_fabric_configfs->tf_ops,
223 conn->sess->se_sess, data_length, data_direction,
224 sam_task_attr, &cmd->sense_buffer[0]);
228 struct iscsi_cmd *iscsit_allocate_se_cmd_for_tmr(
229 struct iscsi_conn *conn,
232 struct iscsi_cmd *cmd;
233 struct se_cmd *se_cmd;
236 cmd = iscsit_allocate_cmd(conn, GFP_KERNEL);
240 cmd->data_direction = DMA_NONE;
242 cmd->tmr_req = kzalloc(sizeof(struct iscsi_tmr_req), GFP_KERNEL);
244 pr_err("Unable to allocate memory for"
245 " Task Management command!\n");
249 * TASK_REASSIGN for ERL=2 / connection stays inside of
250 * LIO-Target $FABRIC_MOD
252 if (function == ISCSI_TM_FUNC_TASK_REASSIGN)
255 se_cmd = &cmd->se_cmd;
257 * Initialize struct se_cmd descriptor from target_core_mod infrastructure
259 transport_init_se_cmd(se_cmd, &lio_target_fabric_configfs->tf_ops,
260 conn->sess->se_sess, 0, DMA_NONE,
261 MSG_SIMPLE_TAG, &cmd->sense_buffer[0]);
264 case ISCSI_TM_FUNC_ABORT_TASK:
265 tcm_function = TMR_ABORT_TASK;
267 case ISCSI_TM_FUNC_ABORT_TASK_SET:
268 tcm_function = TMR_ABORT_TASK_SET;
270 case ISCSI_TM_FUNC_CLEAR_ACA:
271 tcm_function = TMR_CLEAR_ACA;
273 case ISCSI_TM_FUNC_CLEAR_TASK_SET:
274 tcm_function = TMR_CLEAR_TASK_SET;
276 case ISCSI_TM_FUNC_LOGICAL_UNIT_RESET:
277 tcm_function = TMR_LUN_RESET;
279 case ISCSI_TM_FUNC_TARGET_WARM_RESET:
280 tcm_function = TMR_TARGET_WARM_RESET;
282 case ISCSI_TM_FUNC_TARGET_COLD_RESET:
283 tcm_function = TMR_TARGET_COLD_RESET;
286 pr_err("Unknown iSCSI TMR Function:"
287 " 0x%02x\n", function);
291 se_cmd->se_tmr_req = core_tmr_alloc_req(se_cmd,
292 (void *)cmd->tmr_req, tcm_function,
294 if (!se_cmd->se_tmr_req)
297 cmd->tmr_req->se_tmr_req = se_cmd->se_tmr_req;
301 iscsit_release_cmd(cmd);
305 int iscsit_decide_list_to_build(
306 struct iscsi_cmd *cmd,
307 u32 immediate_data_length)
309 struct iscsi_build_list bl;
310 struct iscsi_conn *conn = cmd->conn;
311 struct iscsi_session *sess = conn->sess;
312 struct iscsi_node_attrib *na;
314 if (sess->sess_ops->DataSequenceInOrder &&
315 sess->sess_ops->DataPDUInOrder)
318 if (cmd->data_direction == DMA_NONE)
321 na = iscsit_tpg_get_node_attrib(sess);
322 memset(&bl, 0, sizeof(struct iscsi_build_list));
324 if (cmd->data_direction == DMA_FROM_DEVICE) {
325 bl.data_direction = ISCSI_PDU_READ;
326 bl.type = PDULIST_NORMAL;
327 if (na->random_datain_pdu_offsets)
328 bl.randomize |= RANDOM_DATAIN_PDU_OFFSETS;
329 if (na->random_datain_seq_offsets)
330 bl.randomize |= RANDOM_DATAIN_SEQ_OFFSETS;
332 bl.data_direction = ISCSI_PDU_WRITE;
333 bl.immediate_data_length = immediate_data_length;
334 if (na->random_r2t_offsets)
335 bl.randomize |= RANDOM_R2T_OFFSETS;
337 if (!cmd->immediate_data && !cmd->unsolicited_data)
338 bl.type = PDULIST_NORMAL;
339 else if (cmd->immediate_data && !cmd->unsolicited_data)
340 bl.type = PDULIST_IMMEDIATE;
341 else if (!cmd->immediate_data && cmd->unsolicited_data)
342 bl.type = PDULIST_UNSOLICITED;
343 else if (cmd->immediate_data && cmd->unsolicited_data)
344 bl.type = PDULIST_IMMEDIATE_AND_UNSOLICITED;
347 return iscsit_do_build_list(cmd, &bl);
350 struct iscsi_seq *iscsit_get_seq_holder_for_datain(
351 struct iscsi_cmd *cmd,
356 for (i = 0; i < cmd->seq_count; i++)
357 if (cmd->seq_list[i].seq_send_order == seq_send_order)
358 return &cmd->seq_list[i];
363 struct iscsi_seq *iscsit_get_seq_holder_for_r2t(struct iscsi_cmd *cmd)
367 if (!cmd->seq_list) {
368 pr_err("struct iscsi_cmd->seq_list is NULL!\n");
372 for (i = 0; i < cmd->seq_count; i++) {
373 if (cmd->seq_list[i].type != SEQTYPE_NORMAL)
375 if (cmd->seq_list[i].seq_send_order == cmd->seq_send_order) {
376 cmd->seq_send_order++;
377 return &cmd->seq_list[i];
384 struct iscsi_r2t *iscsit_get_holder_for_r2tsn(
385 struct iscsi_cmd *cmd,
388 struct iscsi_r2t *r2t;
390 spin_lock_bh(&cmd->r2t_lock);
391 list_for_each_entry(r2t, &cmd->cmd_r2t_list, r2t_list) {
392 if (r2t->r2t_sn == r2t_sn) {
393 spin_unlock_bh(&cmd->r2t_lock);
397 spin_unlock_bh(&cmd->r2t_lock);
402 static inline int iscsit_check_received_cmdsn(struct iscsi_session *sess, u32 cmdsn)
407 * This is the proper method of checking received CmdSN against
408 * ExpCmdSN and MaxCmdSN values, as well as accounting for out
409 * or order CmdSNs due to multiple connection sessions and/or
412 if (iscsi_sna_gt(cmdsn, sess->max_cmd_sn)) {
413 pr_err("Received CmdSN: 0x%08x is greater than"
414 " MaxCmdSN: 0x%08x, protocol error.\n", cmdsn,
416 ret = CMDSN_ERROR_CANNOT_RECOVER;
418 } else if (cmdsn == sess->exp_cmd_sn) {
420 pr_debug("Received CmdSN matches ExpCmdSN,"
421 " incremented ExpCmdSN to: 0x%08x\n",
423 ret = CMDSN_NORMAL_OPERATION;
425 } else if (iscsi_sna_gt(cmdsn, sess->exp_cmd_sn)) {
426 pr_debug("Received CmdSN: 0x%08x is greater"
427 " than ExpCmdSN: 0x%08x, not acknowledging.\n",
428 cmdsn, sess->exp_cmd_sn);
429 ret = CMDSN_HIGHER_THAN_EXP;
432 pr_err("Received CmdSN: 0x%08x is less than"
433 " ExpCmdSN: 0x%08x, ignoring.\n", cmdsn,
435 ret = CMDSN_LOWER_THAN_EXP;
442 * Commands may be received out of order if MC/S is in use.
443 * Ensure they are executed in CmdSN order.
445 int iscsit_sequence_cmd(
446 struct iscsi_conn *conn,
447 struct iscsi_cmd *cmd,
453 mutex_lock(&conn->sess->cmdsn_mutex);
455 cmdsn_ret = iscsit_check_received_cmdsn(conn->sess, cmdsn);
457 case CMDSN_NORMAL_OPERATION:
458 ret = iscsit_execute_cmd(cmd, 0);
459 if ((ret >= 0) && !list_empty(&conn->sess->sess_ooo_cmdsn_list))
460 iscsit_execute_ooo_cmdsns(conn->sess);
462 case CMDSN_HIGHER_THAN_EXP:
463 ret = iscsit_handle_ooo_cmdsn(conn->sess, cmd, cmdsn);
465 case CMDSN_LOWER_THAN_EXP:
466 cmd->i_state = ISTATE_REMOVE;
467 iscsit_add_cmd_to_immediate_queue(cmd, conn, cmd->i_state);
474 mutex_unlock(&conn->sess->cmdsn_mutex);
479 int iscsit_check_unsolicited_dataout(struct iscsi_cmd *cmd, unsigned char *buf)
481 struct iscsi_conn *conn = cmd->conn;
482 struct se_cmd *se_cmd = &cmd->se_cmd;
483 struct iscsi_data *hdr = (struct iscsi_data *) buf;
484 u32 payload_length = ntoh24(hdr->dlength);
486 if (conn->sess->sess_ops->InitialR2T) {
487 pr_err("Received unexpected unsolicited data"
488 " while InitialR2T=Yes, protocol error.\n");
489 transport_send_check_condition_and_sense(se_cmd,
490 TCM_UNEXPECTED_UNSOLICITED_DATA, 0);
494 if ((cmd->first_burst_len + payload_length) >
495 conn->sess->sess_ops->FirstBurstLength) {
496 pr_err("Total %u bytes exceeds FirstBurstLength: %u"
497 " for this Unsolicited DataOut Burst.\n",
498 (cmd->first_burst_len + payload_length),
499 conn->sess->sess_ops->FirstBurstLength);
500 transport_send_check_condition_and_sense(se_cmd,
501 TCM_INCORRECT_AMOUNT_OF_DATA, 0);
505 if (!(hdr->flags & ISCSI_FLAG_CMD_FINAL))
508 if (((cmd->first_burst_len + payload_length) != cmd->data_length) &&
509 ((cmd->first_burst_len + payload_length) !=
510 conn->sess->sess_ops->FirstBurstLength)) {
511 pr_err("Unsolicited non-immediate data received %u"
512 " does not equal FirstBurstLength: %u, and does"
513 " not equal ExpXferLen %u.\n",
514 (cmd->first_burst_len + payload_length),
515 conn->sess->sess_ops->FirstBurstLength, cmd->data_length);
516 transport_send_check_condition_and_sense(se_cmd,
517 TCM_INCORRECT_AMOUNT_OF_DATA, 0);
523 struct iscsi_cmd *iscsit_find_cmd_from_itt(
524 struct iscsi_conn *conn,
527 struct iscsi_cmd *cmd;
529 spin_lock_bh(&conn->cmd_lock);
530 list_for_each_entry(cmd, &conn->conn_cmd_list, i_list) {
531 if (cmd->init_task_tag == init_task_tag) {
532 spin_unlock_bh(&conn->cmd_lock);
536 spin_unlock_bh(&conn->cmd_lock);
538 pr_err("Unable to locate ITT: 0x%08x on CID: %hu",
539 init_task_tag, conn->cid);
543 struct iscsi_cmd *iscsit_find_cmd_from_itt_or_dump(
544 struct iscsi_conn *conn,
548 struct iscsi_cmd *cmd;
550 spin_lock_bh(&conn->cmd_lock);
551 list_for_each_entry(cmd, &conn->conn_cmd_list, i_list) {
552 if (cmd->init_task_tag == init_task_tag) {
553 spin_unlock_bh(&conn->cmd_lock);
557 spin_unlock_bh(&conn->cmd_lock);
559 pr_err("Unable to locate ITT: 0x%08x on CID: %hu,"
560 " dumping payload\n", init_task_tag, conn->cid);
562 iscsit_dump_data_payload(conn, length, 1);
567 struct iscsi_cmd *iscsit_find_cmd_from_ttt(
568 struct iscsi_conn *conn,
571 struct iscsi_cmd *cmd = NULL;
573 spin_lock_bh(&conn->cmd_lock);
574 list_for_each_entry(cmd, &conn->conn_cmd_list, i_list) {
575 if (cmd->targ_xfer_tag == targ_xfer_tag) {
576 spin_unlock_bh(&conn->cmd_lock);
580 spin_unlock_bh(&conn->cmd_lock);
582 pr_err("Unable to locate TTT: 0x%08x on CID: %hu\n",
583 targ_xfer_tag, conn->cid);
587 int iscsit_find_cmd_for_recovery(
588 struct iscsi_session *sess,
589 struct iscsi_cmd **cmd_ptr,
590 struct iscsi_conn_recovery **cr_ptr,
593 struct iscsi_cmd *cmd = NULL;
594 struct iscsi_conn_recovery *cr;
596 * Scan through the inactive connection recovery list's command list.
597 * If init_task_tag matches the command is still alligent.
599 spin_lock(&sess->cr_i_lock);
600 list_for_each_entry(cr, &sess->cr_inactive_list, cr_list) {
601 spin_lock(&cr->conn_recovery_cmd_lock);
602 list_for_each_entry(cmd, &cr->conn_recovery_cmd_list, i_list) {
603 if (cmd->init_task_tag == init_task_tag) {
604 spin_unlock(&cr->conn_recovery_cmd_lock);
605 spin_unlock(&sess->cr_i_lock);
612 spin_unlock(&cr->conn_recovery_cmd_lock);
614 spin_unlock(&sess->cr_i_lock);
616 * Scan through the active connection recovery list's command list.
617 * If init_task_tag matches the command is ready to be reassigned.
619 spin_lock(&sess->cr_a_lock);
620 list_for_each_entry(cr, &sess->cr_active_list, cr_list) {
621 spin_lock(&cr->conn_recovery_cmd_lock);
622 list_for_each_entry(cmd, &cr->conn_recovery_cmd_list, i_list) {
623 if (cmd->init_task_tag == init_task_tag) {
624 spin_unlock(&cr->conn_recovery_cmd_lock);
625 spin_unlock(&sess->cr_a_lock);
632 spin_unlock(&cr->conn_recovery_cmd_lock);
634 spin_unlock(&sess->cr_a_lock);
639 void iscsit_add_cmd_to_immediate_queue(
640 struct iscsi_cmd *cmd,
641 struct iscsi_conn *conn,
644 struct iscsi_queue_req *qr;
646 qr = kmem_cache_zalloc(lio_qr_cache, GFP_ATOMIC);
648 pr_err("Unable to allocate memory for"
649 " struct iscsi_queue_req\n");
652 INIT_LIST_HEAD(&qr->qr_list);
656 spin_lock_bh(&conn->immed_queue_lock);
657 list_add_tail(&qr->qr_list, &conn->immed_queue_list);
658 atomic_inc(&cmd->immed_queue_count);
659 atomic_set(&conn->check_immediate_queue, 1);
660 spin_unlock_bh(&conn->immed_queue_lock);
662 wake_up(&conn->queues_wq);
665 struct iscsi_queue_req *iscsit_get_cmd_from_immediate_queue(struct iscsi_conn *conn)
667 struct iscsi_queue_req *qr;
669 spin_lock_bh(&conn->immed_queue_lock);
670 if (list_empty(&conn->immed_queue_list)) {
671 spin_unlock_bh(&conn->immed_queue_lock);
674 list_for_each_entry(qr, &conn->immed_queue_list, qr_list)
677 list_del(&qr->qr_list);
679 atomic_dec(&qr->cmd->immed_queue_count);
680 spin_unlock_bh(&conn->immed_queue_lock);
685 static void iscsit_remove_cmd_from_immediate_queue(
686 struct iscsi_cmd *cmd,
687 struct iscsi_conn *conn)
689 struct iscsi_queue_req *qr, *qr_tmp;
691 spin_lock_bh(&conn->immed_queue_lock);
692 if (!atomic_read(&cmd->immed_queue_count)) {
693 spin_unlock_bh(&conn->immed_queue_lock);
697 list_for_each_entry_safe(qr, qr_tmp, &conn->immed_queue_list, qr_list) {
701 atomic_dec(&qr->cmd->immed_queue_count);
702 list_del(&qr->qr_list);
703 kmem_cache_free(lio_qr_cache, qr);
705 spin_unlock_bh(&conn->immed_queue_lock);
707 if (atomic_read(&cmd->immed_queue_count)) {
708 pr_err("ITT: 0x%08x immed_queue_count: %d\n",
710 atomic_read(&cmd->immed_queue_count));
714 void iscsit_add_cmd_to_response_queue(
715 struct iscsi_cmd *cmd,
716 struct iscsi_conn *conn,
719 struct iscsi_queue_req *qr;
721 qr = kmem_cache_zalloc(lio_qr_cache, GFP_ATOMIC);
723 pr_err("Unable to allocate memory for"
724 " struct iscsi_queue_req\n");
727 INIT_LIST_HEAD(&qr->qr_list);
731 spin_lock_bh(&conn->response_queue_lock);
732 list_add_tail(&qr->qr_list, &conn->response_queue_list);
733 atomic_inc(&cmd->response_queue_count);
734 spin_unlock_bh(&conn->response_queue_lock);
736 wake_up(&conn->queues_wq);
739 struct iscsi_queue_req *iscsit_get_cmd_from_response_queue(struct iscsi_conn *conn)
741 struct iscsi_queue_req *qr;
743 spin_lock_bh(&conn->response_queue_lock);
744 if (list_empty(&conn->response_queue_list)) {
745 spin_unlock_bh(&conn->response_queue_lock);
749 list_for_each_entry(qr, &conn->response_queue_list, qr_list)
752 list_del(&qr->qr_list);
754 atomic_dec(&qr->cmd->response_queue_count);
755 spin_unlock_bh(&conn->response_queue_lock);
760 static void iscsit_remove_cmd_from_response_queue(
761 struct iscsi_cmd *cmd,
762 struct iscsi_conn *conn)
764 struct iscsi_queue_req *qr, *qr_tmp;
766 spin_lock_bh(&conn->response_queue_lock);
767 if (!atomic_read(&cmd->response_queue_count)) {
768 spin_unlock_bh(&conn->response_queue_lock);
772 list_for_each_entry_safe(qr, qr_tmp, &conn->response_queue_list,
777 atomic_dec(&qr->cmd->response_queue_count);
778 list_del(&qr->qr_list);
779 kmem_cache_free(lio_qr_cache, qr);
781 spin_unlock_bh(&conn->response_queue_lock);
783 if (atomic_read(&cmd->response_queue_count)) {
784 pr_err("ITT: 0x%08x response_queue_count: %d\n",
786 atomic_read(&cmd->response_queue_count));
790 bool iscsit_conn_all_queues_empty(struct iscsi_conn *conn)
794 spin_lock_bh(&conn->immed_queue_lock);
795 empty = list_empty(&conn->immed_queue_list);
796 spin_unlock_bh(&conn->immed_queue_lock);
801 spin_lock_bh(&conn->response_queue_lock);
802 empty = list_empty(&conn->response_queue_list);
803 spin_unlock_bh(&conn->response_queue_lock);
808 void iscsit_free_queue_reqs_for_conn(struct iscsi_conn *conn)
810 struct iscsi_queue_req *qr, *qr_tmp;
812 spin_lock_bh(&conn->immed_queue_lock);
813 list_for_each_entry_safe(qr, qr_tmp, &conn->immed_queue_list, qr_list) {
814 list_del(&qr->qr_list);
816 atomic_dec(&qr->cmd->immed_queue_count);
818 kmem_cache_free(lio_qr_cache, qr);
820 spin_unlock_bh(&conn->immed_queue_lock);
822 spin_lock_bh(&conn->response_queue_lock);
823 list_for_each_entry_safe(qr, qr_tmp, &conn->response_queue_list,
825 list_del(&qr->qr_list);
827 atomic_dec(&qr->cmd->response_queue_count);
829 kmem_cache_free(lio_qr_cache, qr);
831 spin_unlock_bh(&conn->response_queue_lock);
834 void iscsit_release_cmd(struct iscsi_cmd *cmd)
836 struct iscsi_conn *conn = cmd->conn;
839 iscsit_free_r2ts_from_list(cmd);
840 iscsit_free_all_datain_reqs(cmd);
843 kfree(cmd->pdu_list);
844 kfree(cmd->seq_list);
846 kfree(cmd->iov_data);
848 for (i = 0; i < cmd->t_mem_sg_nents; i++)
849 __free_page(sg_page(&cmd->t_mem_sg[i]));
851 kfree(cmd->t_mem_sg);
854 iscsit_remove_cmd_from_immediate_queue(cmd, conn);
855 iscsit_remove_cmd_from_response_queue(cmd, conn);
858 kmem_cache_free(lio_cmd_cache, cmd);
861 void iscsit_free_cmd(struct iscsi_cmd *cmd)
864 * Determine if a struct se_cmd is assoicated with
865 * this struct iscsi_cmd.
867 switch (cmd->iscsi_opcode) {
868 case ISCSI_OP_SCSI_CMD:
869 case ISCSI_OP_SCSI_TMFUNC:
870 transport_generic_free_cmd(&cmd->se_cmd, 1);
872 case ISCSI_OP_REJECT:
874 * Handle special case for REJECT when iscsi_add_reject*() has
875 * overwritten the original iscsi_opcode assignment, and the
876 * associated cmd->se_cmd needs to be released.
878 if (cmd->se_cmd.se_tfo != NULL) {
879 transport_generic_free_cmd(&cmd->se_cmd, 1);
884 iscsit_release_cmd(cmd);
889 int iscsit_check_session_usage_count(struct iscsi_session *sess)
891 spin_lock_bh(&sess->session_usage_lock);
892 if (sess->session_usage_count != 0) {
893 sess->session_waiting_on_uc = 1;
894 spin_unlock_bh(&sess->session_usage_lock);
898 wait_for_completion(&sess->session_waiting_on_uc_comp);
901 spin_unlock_bh(&sess->session_usage_lock);
906 void iscsit_dec_session_usage_count(struct iscsi_session *sess)
908 spin_lock_bh(&sess->session_usage_lock);
909 sess->session_usage_count--;
911 if (!sess->session_usage_count && sess->session_waiting_on_uc)
912 complete(&sess->session_waiting_on_uc_comp);
914 spin_unlock_bh(&sess->session_usage_lock);
917 void iscsit_inc_session_usage_count(struct iscsi_session *sess)
919 spin_lock_bh(&sess->session_usage_lock);
920 sess->session_usage_count++;
921 spin_unlock_bh(&sess->session_usage_lock);
925 * Setup conn->if_marker and conn->of_marker values based upon
926 * the initial marker-less interval. (see iSCSI v19 A.2)
928 int iscsit_set_sync_and_steering_values(struct iscsi_conn *conn)
930 int login_ifmarker_count = 0, login_ofmarker_count = 0, next_marker = 0;
932 * IFMarkInt and OFMarkInt are negotiated as 32-bit words.
934 u32 IFMarkInt = (conn->conn_ops->IFMarkInt * 4);
935 u32 OFMarkInt = (conn->conn_ops->OFMarkInt * 4);
937 if (conn->conn_ops->OFMarker) {
939 * Account for the first Login Command received not
940 * via iscsi_recv_msg().
942 conn->of_marker += ISCSI_HDR_LEN;
943 if (conn->of_marker <= OFMarkInt) {
944 conn->of_marker = (OFMarkInt - conn->of_marker);
946 login_ofmarker_count = (conn->of_marker / OFMarkInt);
947 next_marker = (OFMarkInt * (login_ofmarker_count + 1)) +
948 (login_ofmarker_count * MARKER_SIZE);
949 conn->of_marker = (next_marker - conn->of_marker);
951 conn->of_marker_offset = 0;
952 pr_debug("Setting OFMarker value to %u based on Initial"
953 " Markerless Interval.\n", conn->of_marker);
956 if (conn->conn_ops->IFMarker) {
957 if (conn->if_marker <= IFMarkInt) {
958 conn->if_marker = (IFMarkInt - conn->if_marker);
960 login_ifmarker_count = (conn->if_marker / IFMarkInt);
961 next_marker = (IFMarkInt * (login_ifmarker_count + 1)) +
962 (login_ifmarker_count * MARKER_SIZE);
963 conn->if_marker = (next_marker - conn->if_marker);
965 pr_debug("Setting IFMarker value to %u based on Initial"
966 " Markerless Interval.\n", conn->if_marker);
972 struct iscsi_conn *iscsit_get_conn_from_cid(struct iscsi_session *sess, u16 cid)
974 struct iscsi_conn *conn;
976 spin_lock_bh(&sess->conn_lock);
977 list_for_each_entry(conn, &sess->sess_conn_list, conn_list) {
978 if ((conn->cid == cid) &&
979 (conn->conn_state == TARG_CONN_STATE_LOGGED_IN)) {
980 iscsit_inc_conn_usage_count(conn);
981 spin_unlock_bh(&sess->conn_lock);
985 spin_unlock_bh(&sess->conn_lock);
990 struct iscsi_conn *iscsit_get_conn_from_cid_rcfr(struct iscsi_session *sess, u16 cid)
992 struct iscsi_conn *conn;
994 spin_lock_bh(&sess->conn_lock);
995 list_for_each_entry(conn, &sess->sess_conn_list, conn_list) {
996 if (conn->cid == cid) {
997 iscsit_inc_conn_usage_count(conn);
998 spin_lock(&conn->state_lock);
999 atomic_set(&conn->connection_wait_rcfr, 1);
1000 spin_unlock(&conn->state_lock);
1001 spin_unlock_bh(&sess->conn_lock);
1005 spin_unlock_bh(&sess->conn_lock);
1010 void iscsit_check_conn_usage_count(struct iscsi_conn *conn)
1012 spin_lock_bh(&conn->conn_usage_lock);
1013 if (conn->conn_usage_count != 0) {
1014 conn->conn_waiting_on_uc = 1;
1015 spin_unlock_bh(&conn->conn_usage_lock);
1017 wait_for_completion(&conn->conn_waiting_on_uc_comp);
1020 spin_unlock_bh(&conn->conn_usage_lock);
1023 void iscsit_dec_conn_usage_count(struct iscsi_conn *conn)
1025 spin_lock_bh(&conn->conn_usage_lock);
1026 conn->conn_usage_count--;
1028 if (!conn->conn_usage_count && conn->conn_waiting_on_uc)
1029 complete(&conn->conn_waiting_on_uc_comp);
1031 spin_unlock_bh(&conn->conn_usage_lock);
1034 void iscsit_inc_conn_usage_count(struct iscsi_conn *conn)
1036 spin_lock_bh(&conn->conn_usage_lock);
1037 conn->conn_usage_count++;
1038 spin_unlock_bh(&conn->conn_usage_lock);
1041 static int iscsit_add_nopin(struct iscsi_conn *conn, int want_response)
1044 struct iscsi_cmd *cmd;
1046 cmd = iscsit_allocate_cmd(conn, GFP_ATOMIC);
1050 cmd->iscsi_opcode = ISCSI_OP_NOOP_IN;
1051 state = (want_response) ? ISTATE_SEND_NOPIN_WANT_RESPONSE :
1052 ISTATE_SEND_NOPIN_NO_RESPONSE;
1053 cmd->init_task_tag = 0xFFFFFFFF;
1054 spin_lock_bh(&conn->sess->ttt_lock);
1055 cmd->targ_xfer_tag = (want_response) ? conn->sess->targ_xfer_tag++ :
1057 if (want_response && (cmd->targ_xfer_tag == 0xFFFFFFFF))
1058 cmd->targ_xfer_tag = conn->sess->targ_xfer_tag++;
1059 spin_unlock_bh(&conn->sess->ttt_lock);
1061 spin_lock_bh(&conn->cmd_lock);
1062 list_add_tail(&cmd->i_list, &conn->conn_cmd_list);
1063 spin_unlock_bh(&conn->cmd_lock);
1066 iscsit_start_nopin_response_timer(conn);
1067 iscsit_add_cmd_to_immediate_queue(cmd, conn, state);
1072 static void iscsit_handle_nopin_response_timeout(unsigned long data)
1074 struct iscsi_conn *conn = (struct iscsi_conn *) data;
1076 iscsit_inc_conn_usage_count(conn);
1078 spin_lock_bh(&conn->nopin_timer_lock);
1079 if (conn->nopin_response_timer_flags & ISCSI_TF_STOP) {
1080 spin_unlock_bh(&conn->nopin_timer_lock);
1081 iscsit_dec_conn_usage_count(conn);
1085 pr_debug("Did not receive response to NOPIN on CID: %hu on"
1086 " SID: %u, failing connection.\n", conn->cid,
1088 conn->nopin_response_timer_flags &= ~ISCSI_TF_RUNNING;
1089 spin_unlock_bh(&conn->nopin_timer_lock);
1092 struct iscsi_portal_group *tpg = conn->sess->tpg;
1093 struct iscsi_tiqn *tiqn = tpg->tpg_tiqn;
1096 spin_lock_bh(&tiqn->sess_err_stats.lock);
1097 strcpy(tiqn->sess_err_stats.last_sess_fail_rem_name,
1098 (void *)conn->sess->sess_ops->InitiatorName);
1099 tiqn->sess_err_stats.last_sess_failure_type =
1100 ISCSI_SESS_ERR_CXN_TIMEOUT;
1101 tiqn->sess_err_stats.cxn_timeout_errors++;
1102 conn->sess->conn_timeout_errors++;
1103 spin_unlock_bh(&tiqn->sess_err_stats.lock);
1107 iscsit_cause_connection_reinstatement(conn, 0);
1108 iscsit_dec_conn_usage_count(conn);
1111 void iscsit_mod_nopin_response_timer(struct iscsi_conn *conn)
1113 struct iscsi_session *sess = conn->sess;
1114 struct iscsi_node_attrib *na = iscsit_tpg_get_node_attrib(sess);
1116 spin_lock_bh(&conn->nopin_timer_lock);
1117 if (!(conn->nopin_response_timer_flags & ISCSI_TF_RUNNING)) {
1118 spin_unlock_bh(&conn->nopin_timer_lock);
1122 mod_timer(&conn->nopin_response_timer,
1123 (get_jiffies_64() + na->nopin_response_timeout * HZ));
1124 spin_unlock_bh(&conn->nopin_timer_lock);
1128 * Called with conn->nopin_timer_lock held.
1130 void iscsit_start_nopin_response_timer(struct iscsi_conn *conn)
1132 struct iscsi_session *sess = conn->sess;
1133 struct iscsi_node_attrib *na = iscsit_tpg_get_node_attrib(sess);
1135 spin_lock_bh(&conn->nopin_timer_lock);
1136 if (conn->nopin_response_timer_flags & ISCSI_TF_RUNNING) {
1137 spin_unlock_bh(&conn->nopin_timer_lock);
1141 init_timer(&conn->nopin_response_timer);
1142 conn->nopin_response_timer.expires =
1143 (get_jiffies_64() + na->nopin_response_timeout * HZ);
1144 conn->nopin_response_timer.data = (unsigned long)conn;
1145 conn->nopin_response_timer.function = iscsit_handle_nopin_response_timeout;
1146 conn->nopin_response_timer_flags &= ~ISCSI_TF_STOP;
1147 conn->nopin_response_timer_flags |= ISCSI_TF_RUNNING;
1148 add_timer(&conn->nopin_response_timer);
1150 pr_debug("Started NOPIN Response Timer on CID: %d to %u"
1151 " seconds\n", conn->cid, na->nopin_response_timeout);
1152 spin_unlock_bh(&conn->nopin_timer_lock);
1155 void iscsit_stop_nopin_response_timer(struct iscsi_conn *conn)
1157 spin_lock_bh(&conn->nopin_timer_lock);
1158 if (!(conn->nopin_response_timer_flags & ISCSI_TF_RUNNING)) {
1159 spin_unlock_bh(&conn->nopin_timer_lock);
1162 conn->nopin_response_timer_flags |= ISCSI_TF_STOP;
1163 spin_unlock_bh(&conn->nopin_timer_lock);
1165 del_timer_sync(&conn->nopin_response_timer);
1167 spin_lock_bh(&conn->nopin_timer_lock);
1168 conn->nopin_response_timer_flags &= ~ISCSI_TF_RUNNING;
1169 spin_unlock_bh(&conn->nopin_timer_lock);
1172 static void iscsit_handle_nopin_timeout(unsigned long data)
1174 struct iscsi_conn *conn = (struct iscsi_conn *) data;
1176 iscsit_inc_conn_usage_count(conn);
1178 spin_lock_bh(&conn->nopin_timer_lock);
1179 if (conn->nopin_timer_flags & ISCSI_TF_STOP) {
1180 spin_unlock_bh(&conn->nopin_timer_lock);
1181 iscsit_dec_conn_usage_count(conn);
1184 conn->nopin_timer_flags &= ~ISCSI_TF_RUNNING;
1185 spin_unlock_bh(&conn->nopin_timer_lock);
1187 iscsit_add_nopin(conn, 1);
1188 iscsit_dec_conn_usage_count(conn);
1192 * Called with conn->nopin_timer_lock held.
1194 void __iscsit_start_nopin_timer(struct iscsi_conn *conn)
1196 struct iscsi_session *sess = conn->sess;
1197 struct iscsi_node_attrib *na = iscsit_tpg_get_node_attrib(sess);
1199 * NOPIN timeout is disabled.
1201 if (!na->nopin_timeout)
1204 if (conn->nopin_timer_flags & ISCSI_TF_RUNNING)
1207 init_timer(&conn->nopin_timer);
1208 conn->nopin_timer.expires = (get_jiffies_64() + na->nopin_timeout * HZ);
1209 conn->nopin_timer.data = (unsigned long)conn;
1210 conn->nopin_timer.function = iscsit_handle_nopin_timeout;
1211 conn->nopin_timer_flags &= ~ISCSI_TF_STOP;
1212 conn->nopin_timer_flags |= ISCSI_TF_RUNNING;
1213 add_timer(&conn->nopin_timer);
1215 pr_debug("Started NOPIN Timer on CID: %d at %u second"
1216 " interval\n", conn->cid, na->nopin_timeout);
1219 void iscsit_start_nopin_timer(struct iscsi_conn *conn)
1221 struct iscsi_session *sess = conn->sess;
1222 struct iscsi_node_attrib *na = iscsit_tpg_get_node_attrib(sess);
1224 * NOPIN timeout is disabled..
1226 if (!na->nopin_timeout)
1229 spin_lock_bh(&conn->nopin_timer_lock);
1230 if (conn->nopin_timer_flags & ISCSI_TF_RUNNING) {
1231 spin_unlock_bh(&conn->nopin_timer_lock);
1235 init_timer(&conn->nopin_timer);
1236 conn->nopin_timer.expires = (get_jiffies_64() + na->nopin_timeout * HZ);
1237 conn->nopin_timer.data = (unsigned long)conn;
1238 conn->nopin_timer.function = iscsit_handle_nopin_timeout;
1239 conn->nopin_timer_flags &= ~ISCSI_TF_STOP;
1240 conn->nopin_timer_flags |= ISCSI_TF_RUNNING;
1241 add_timer(&conn->nopin_timer);
1243 pr_debug("Started NOPIN Timer on CID: %d at %u second"
1244 " interval\n", conn->cid, na->nopin_timeout);
1245 spin_unlock_bh(&conn->nopin_timer_lock);
1248 void iscsit_stop_nopin_timer(struct iscsi_conn *conn)
1250 spin_lock_bh(&conn->nopin_timer_lock);
1251 if (!(conn->nopin_timer_flags & ISCSI_TF_RUNNING)) {
1252 spin_unlock_bh(&conn->nopin_timer_lock);
1255 conn->nopin_timer_flags |= ISCSI_TF_STOP;
1256 spin_unlock_bh(&conn->nopin_timer_lock);
1258 del_timer_sync(&conn->nopin_timer);
1260 spin_lock_bh(&conn->nopin_timer_lock);
1261 conn->nopin_timer_flags &= ~ISCSI_TF_RUNNING;
1262 spin_unlock_bh(&conn->nopin_timer_lock);
1265 int iscsit_send_tx_data(
1266 struct iscsi_cmd *cmd,
1267 struct iscsi_conn *conn,
1270 int tx_sent, tx_size;
1275 tx_size = cmd->tx_size;
1278 iov = &cmd->iov_data[0];
1279 iov_count = cmd->iov_data_count;
1281 iov = &cmd->iov_misc[0];
1282 iov_count = cmd->iov_misc_count;
1285 tx_sent = tx_data(conn, &iov[0], iov_count, tx_size);
1286 if (tx_size != tx_sent) {
1287 if (tx_sent == -EAGAIN) {
1288 pr_err("tx_data() returned -EAGAIN\n");
1298 int iscsit_fe_sendpage_sg(
1299 struct iscsi_cmd *cmd,
1300 struct iscsi_conn *conn)
1302 struct scatterlist *sg = cmd->first_data_sg;
1304 u32 tx_hdr_size, data_len;
1305 u32 offset = cmd->first_data_sg_off;
1306 int tx_sent, iov_off;
1309 tx_hdr_size = ISCSI_HDR_LEN;
1310 if (conn->conn_ops->HeaderDigest)
1311 tx_hdr_size += ISCSI_CRC_LEN;
1313 iov.iov_base = cmd->pdu;
1314 iov.iov_len = tx_hdr_size;
1316 tx_sent = tx_data(conn, &iov, 1, tx_hdr_size);
1317 if (tx_hdr_size != tx_sent) {
1318 if (tx_sent == -EAGAIN) {
1319 pr_err("tx_data() returned -EAGAIN\n");
1325 data_len = cmd->tx_size - tx_hdr_size - cmd->padding;
1327 * Set iov_off used by padding and data digest tx_data() calls below
1328 * in order to determine proper offset into cmd->iov_data[]
1330 if (conn->conn_ops->DataDigest) {
1331 data_len -= ISCSI_CRC_LEN;
1333 iov_off = (cmd->iov_data_count - 2);
1335 iov_off = (cmd->iov_data_count - 1);
1337 iov_off = (cmd->iov_data_count - 1);
1340 * Perform sendpage() for each page in the scatterlist
1343 u32 space = (sg->length - offset);
1344 u32 sub_len = min_t(u32, data_len, space);
1346 tx_sent = conn->sock->ops->sendpage(conn->sock,
1347 sg_page(sg), sg->offset + offset, sub_len, 0);
1348 if (tx_sent != sub_len) {
1349 if (tx_sent == -EAGAIN) {
1350 pr_err("tcp_sendpage() returned"
1355 pr_err("tcp_sendpage() failure: %d\n",
1360 data_len -= sub_len;
1367 struct kvec *iov_p = &cmd->iov_data[iov_off++];
1369 tx_sent = tx_data(conn, iov_p, 1, cmd->padding);
1370 if (cmd->padding != tx_sent) {
1371 if (tx_sent == -EAGAIN) {
1372 pr_err("tx_data() returned -EAGAIN\n");
1380 if (conn->conn_ops->DataDigest) {
1381 struct kvec *iov_d = &cmd->iov_data[iov_off];
1383 tx_sent = tx_data(conn, iov_d, 1, ISCSI_CRC_LEN);
1384 if (ISCSI_CRC_LEN != tx_sent) {
1385 if (tx_sent == -EAGAIN) {
1386 pr_err("tx_data() returned -EAGAIN\n");
1397 * This function is used for mainly sending a ISCSI_TARG_LOGIN_RSP PDU
1398 * back to the Initiator when an expection condition occurs with the
1399 * errors set in status_class and status_detail.
1401 * Parameters: iSCSI Connection, Status Class, Status Detail.
1402 * Returns: 0 on success, -1 on error.
1404 int iscsit_tx_login_rsp(struct iscsi_conn *conn, u8 status_class, u8 status_detail)
1406 u8 iscsi_hdr[ISCSI_HDR_LEN];
1409 struct iscsi_login_rsp *hdr;
1411 iscsit_collect_login_stats(conn, status_class, status_detail);
1413 memset(&iov, 0, sizeof(struct kvec));
1414 memset(&iscsi_hdr, 0x0, ISCSI_HDR_LEN);
1416 hdr = (struct iscsi_login_rsp *)&iscsi_hdr;
1417 hdr->opcode = ISCSI_OP_LOGIN_RSP;
1418 hdr->status_class = status_class;
1419 hdr->status_detail = status_detail;
1420 hdr->itt = cpu_to_be32(conn->login_itt);
1422 iov.iov_base = &iscsi_hdr;
1423 iov.iov_len = ISCSI_HDR_LEN;
1425 PRINT_BUFF(iscsi_hdr, ISCSI_HDR_LEN);
1427 err = tx_data(conn, &iov, 1, ISCSI_HDR_LEN);
1428 if (err != ISCSI_HDR_LEN) {
1429 pr_err("tx_data returned less than expected\n");
1436 void iscsit_print_session_params(struct iscsi_session *sess)
1438 struct iscsi_conn *conn;
1440 pr_debug("-----------------------------[Session Params for"
1441 " SID: %u]-----------------------------\n", sess->sid);
1442 spin_lock_bh(&sess->conn_lock);
1443 list_for_each_entry(conn, &sess->sess_conn_list, conn_list)
1444 iscsi_dump_conn_ops(conn->conn_ops);
1445 spin_unlock_bh(&sess->conn_lock);
1447 iscsi_dump_sess_ops(sess->sess_ops);
1450 static int iscsit_do_rx_data(
1451 struct iscsi_conn *conn,
1452 struct iscsi_data_count *count)
1454 int data = count->data_length, rx_loop = 0, total_rx = 0, iov_len;
1458 if (!conn || !conn->sock || !conn->conn_ops)
1461 memset(&msg, 0, sizeof(struct msghdr));
1464 iov_len = count->iov_count;
1466 while (total_rx < data) {
1467 rx_loop = kernel_recvmsg(conn->sock, &msg, iov_p, iov_len,
1468 (data - total_rx), MSG_WAITALL);
1470 pr_debug("rx_loop: %d total_rx: %d\n",
1474 total_rx += rx_loop;
1475 pr_debug("rx_loop: %d, total_rx: %d, data: %d\n",
1476 rx_loop, total_rx, data);
1482 static int iscsit_do_tx_data(
1483 struct iscsi_conn *conn,
1484 struct iscsi_data_count *count)
1486 int data = count->data_length, total_tx = 0, tx_loop = 0, iov_len;
1490 if (!conn || !conn->sock || !conn->conn_ops)
1494 pr_err("Data length is: %d\n", data);
1498 memset(&msg, 0, sizeof(struct msghdr));
1501 iov_len = count->iov_count;
1503 while (total_tx < data) {
1504 tx_loop = kernel_sendmsg(conn->sock, &msg, iov_p, iov_len,
1507 pr_debug("tx_loop: %d total_tx %d\n",
1511 total_tx += tx_loop;
1512 pr_debug("tx_loop: %d, total_tx: %d, data: %d\n",
1513 tx_loop, total_tx, data);
1520 struct iscsi_conn *conn,
1525 struct iscsi_data_count c;
1527 if (!conn || !conn->sock || !conn->conn_ops)
1530 memset(&c, 0, sizeof(struct iscsi_data_count));
1532 c.iov_count = iov_count;
1533 c.data_length = data;
1534 c.type = ISCSI_RX_DATA;
1536 return iscsit_do_rx_data(conn, &c);
1540 struct iscsi_conn *conn,
1545 struct iscsi_data_count c;
1547 if (!conn || !conn->sock || !conn->conn_ops)
1550 memset(&c, 0, sizeof(struct iscsi_data_count));
1552 c.iov_count = iov_count;
1553 c.data_length = data;
1554 c.type = ISCSI_TX_DATA;
1556 return iscsit_do_tx_data(conn, &c);
1559 void iscsit_collect_login_stats(
1560 struct iscsi_conn *conn,
1564 struct iscsi_param *intrname = NULL;
1565 struct iscsi_tiqn *tiqn;
1566 struct iscsi_login_stats *ls;
1568 tiqn = iscsit_snmp_get_tiqn(conn);
1572 ls = &tiqn->login_stats;
1574 spin_lock(&ls->lock);
1575 if (!strcmp(conn->login_ip, ls->last_intr_fail_ip_addr) &&
1576 ((get_jiffies_64() - ls->last_fail_time) < 10)) {
1577 /* We already have the failure info for this login */
1578 spin_unlock(&ls->lock);
1582 if (status_class == ISCSI_STATUS_CLS_SUCCESS)
1584 else if (status_class == ISCSI_STATUS_CLS_REDIRECT) {
1586 ls->last_fail_type = ISCSI_LOGIN_FAIL_REDIRECT;
1587 } else if ((status_class == ISCSI_STATUS_CLS_INITIATOR_ERR) &&
1588 (status_detail == ISCSI_LOGIN_STATUS_AUTH_FAILED)) {
1589 ls->authenticate_fails++;
1590 ls->last_fail_type = ISCSI_LOGIN_FAIL_AUTHENTICATE;
1591 } else if ((status_class == ISCSI_STATUS_CLS_INITIATOR_ERR) &&
1592 (status_detail == ISCSI_LOGIN_STATUS_TGT_FORBIDDEN)) {
1593 ls->authorize_fails++;
1594 ls->last_fail_type = ISCSI_LOGIN_FAIL_AUTHORIZE;
1595 } else if ((status_class == ISCSI_STATUS_CLS_INITIATOR_ERR) &&
1596 (status_detail == ISCSI_LOGIN_STATUS_INIT_ERR)) {
1597 ls->negotiate_fails++;
1598 ls->last_fail_type = ISCSI_LOGIN_FAIL_NEGOTIATE;
1601 ls->last_fail_type = ISCSI_LOGIN_FAIL_OTHER;
1604 /* Save initiator name, ip address and time, if it is a failed login */
1605 if (status_class != ISCSI_STATUS_CLS_SUCCESS) {
1606 if (conn->param_list)
1607 intrname = iscsi_find_param_from_key(INITIATORNAME,
1609 strcpy(ls->last_intr_fail_name,
1610 (intrname ? intrname->value : "Unknown"));
1612 ls->last_intr_fail_ip_family = conn->sock->sk->sk_family;
1613 snprintf(ls->last_intr_fail_ip_addr, IPV6_ADDRESS_SPACE,
1614 "%s", conn->login_ip);
1615 ls->last_fail_time = get_jiffies_64();
1618 spin_unlock(&ls->lock);
1621 struct iscsi_tiqn *iscsit_snmp_get_tiqn(struct iscsi_conn *conn)
1623 struct iscsi_portal_group *tpg;
1625 if (!conn || !conn->sess)
1628 tpg = conn->sess->tpg;
1635 return tpg->tpg_tiqn;