mirror of
https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git
synced 2024-08-23 17:30:02 +00:00
![Linus Torvalds](/assets/img/avatar_default.png)
Pull vfs sendmsg updates from Al Viro: "More sendmsg work. This is a fairly separate isolated stuff (there's a continuation around lustre, but that one was too late to soak in -next), thus the separate pull request" * 'work.sendmsg' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs: ncpfs: switch to sock_sendmsg() ncpfs: don't mess with manually advancing iovec on send ncpfs: sendmsg does *not* bugger iovec these days ceph_tcp_sendpage(): use ITER_BVEC sendmsg afs_send_pages(): use ITER_BVEC rds: remove dead code ceph: switch to sock_recvmsg() usbip_recv(): switch to sock_recvmsg() iscsi_target: deal with short writes on the tx side [nbd] pass iov_iter to nbd_xmit() [nbd] switch sock_xmit() to sock_{send,recv}msg() [drbd] use sock_sendmsg()
1436 lines
36 KiB
C
1436 lines
36 KiB
C
/*******************************************************************************
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* This file contains the iSCSI Target specific utility functions.
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*
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* (c) Copyright 2007-2013 Datera, Inc.
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*
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* Author: Nicholas A. Bellinger <nab@linux-iscsi.org>
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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******************************************************************************/
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#include <linux/list.h>
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#include <linux/percpu_ida.h>
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#include <net/ipv6.h> /* ipv6_addr_equal() */
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#include <scsi/scsi_tcq.h>
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#include <scsi/iscsi_proto.h>
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#include <target/target_core_base.h>
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#include <target/target_core_fabric.h>
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#include <target/iscsi/iscsi_transport.h>
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#include <target/iscsi/iscsi_target_core.h>
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#include "iscsi_target_parameters.h"
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#include "iscsi_target_seq_pdu_list.h"
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#include "iscsi_target_datain_values.h"
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#include "iscsi_target_erl0.h"
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#include "iscsi_target_erl1.h"
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#include "iscsi_target_erl2.h"
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#include "iscsi_target_tpg.h"
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#include "iscsi_target_util.h"
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#include "iscsi_target.h"
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#define PRINT_BUFF(buff, len) \
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{ \
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int zzz; \
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\
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pr_debug("%d:\n", __LINE__); \
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for (zzz = 0; zzz < len; zzz++) { \
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if (zzz % 16 == 0) { \
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if (zzz) \
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pr_debug("\n"); \
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pr_debug("%4i: ", zzz); \
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} \
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pr_debug("%02x ", (unsigned char) (buff)[zzz]); \
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} \
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if ((len + 1) % 16) \
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pr_debug("\n"); \
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}
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extern struct list_head g_tiqn_list;
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extern spinlock_t tiqn_lock;
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/*
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* Called with cmd->r2t_lock held.
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*/
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int iscsit_add_r2t_to_list(
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struct iscsi_cmd *cmd,
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u32 offset,
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u32 xfer_len,
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int recovery,
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u32 r2t_sn)
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{
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struct iscsi_r2t *r2t;
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r2t = kmem_cache_zalloc(lio_r2t_cache, GFP_ATOMIC);
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if (!r2t) {
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pr_err("Unable to allocate memory for struct iscsi_r2t.\n");
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return -1;
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}
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INIT_LIST_HEAD(&r2t->r2t_list);
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r2t->recovery_r2t = recovery;
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r2t->r2t_sn = (!r2t_sn) ? cmd->r2t_sn++ : r2t_sn;
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r2t->offset = offset;
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r2t->xfer_len = xfer_len;
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list_add_tail(&r2t->r2t_list, &cmd->cmd_r2t_list);
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spin_unlock_bh(&cmd->r2t_lock);
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iscsit_add_cmd_to_immediate_queue(cmd, cmd->conn, ISTATE_SEND_R2T);
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spin_lock_bh(&cmd->r2t_lock);
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return 0;
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}
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struct iscsi_r2t *iscsit_get_r2t_for_eos(
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struct iscsi_cmd *cmd,
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u32 offset,
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u32 length)
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{
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struct iscsi_r2t *r2t;
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spin_lock_bh(&cmd->r2t_lock);
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list_for_each_entry(r2t, &cmd->cmd_r2t_list, r2t_list) {
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if ((r2t->offset <= offset) &&
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(r2t->offset + r2t->xfer_len) >= (offset + length)) {
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spin_unlock_bh(&cmd->r2t_lock);
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return r2t;
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}
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}
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spin_unlock_bh(&cmd->r2t_lock);
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pr_err("Unable to locate R2T for Offset: %u, Length:"
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" %u\n", offset, length);
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return NULL;
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}
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struct iscsi_r2t *iscsit_get_r2t_from_list(struct iscsi_cmd *cmd)
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{
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struct iscsi_r2t *r2t;
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spin_lock_bh(&cmd->r2t_lock);
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list_for_each_entry(r2t, &cmd->cmd_r2t_list, r2t_list) {
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if (!r2t->sent_r2t) {
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spin_unlock_bh(&cmd->r2t_lock);
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return r2t;
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}
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}
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spin_unlock_bh(&cmd->r2t_lock);
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pr_err("Unable to locate next R2T to send for ITT:"
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" 0x%08x.\n", cmd->init_task_tag);
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return NULL;
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}
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/*
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* Called with cmd->r2t_lock held.
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*/
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void iscsit_free_r2t(struct iscsi_r2t *r2t, struct iscsi_cmd *cmd)
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{
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list_del(&r2t->r2t_list);
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kmem_cache_free(lio_r2t_cache, r2t);
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}
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void iscsit_free_r2ts_from_list(struct iscsi_cmd *cmd)
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{
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struct iscsi_r2t *r2t, *r2t_tmp;
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spin_lock_bh(&cmd->r2t_lock);
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list_for_each_entry_safe(r2t, r2t_tmp, &cmd->cmd_r2t_list, r2t_list)
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iscsit_free_r2t(r2t, cmd);
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spin_unlock_bh(&cmd->r2t_lock);
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}
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/*
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* May be called from software interrupt (timer) context for allocating
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* iSCSI NopINs.
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*/
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struct iscsi_cmd *iscsit_allocate_cmd(struct iscsi_conn *conn, int state)
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{
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struct iscsi_cmd *cmd;
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struct se_session *se_sess = conn->sess->se_sess;
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int size, tag;
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tag = percpu_ida_alloc(&se_sess->sess_tag_pool, state);
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if (tag < 0)
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return NULL;
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size = sizeof(struct iscsi_cmd) + conn->conn_transport->priv_size;
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cmd = (struct iscsi_cmd *)(se_sess->sess_cmd_map + (tag * size));
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memset(cmd, 0, size);
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cmd->se_cmd.map_tag = tag;
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cmd->conn = conn;
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INIT_LIST_HEAD(&cmd->i_conn_node);
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INIT_LIST_HEAD(&cmd->datain_list);
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INIT_LIST_HEAD(&cmd->cmd_r2t_list);
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spin_lock_init(&cmd->datain_lock);
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spin_lock_init(&cmd->dataout_timeout_lock);
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spin_lock_init(&cmd->istate_lock);
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spin_lock_init(&cmd->error_lock);
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spin_lock_init(&cmd->r2t_lock);
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return cmd;
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}
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EXPORT_SYMBOL(iscsit_allocate_cmd);
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struct iscsi_seq *iscsit_get_seq_holder_for_datain(
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struct iscsi_cmd *cmd,
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u32 seq_send_order)
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{
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u32 i;
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for (i = 0; i < cmd->seq_count; i++)
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if (cmd->seq_list[i].seq_send_order == seq_send_order)
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return &cmd->seq_list[i];
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return NULL;
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}
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struct iscsi_seq *iscsit_get_seq_holder_for_r2t(struct iscsi_cmd *cmd)
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{
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u32 i;
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if (!cmd->seq_list) {
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pr_err("struct iscsi_cmd->seq_list is NULL!\n");
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return NULL;
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}
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for (i = 0; i < cmd->seq_count; i++) {
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if (cmd->seq_list[i].type != SEQTYPE_NORMAL)
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continue;
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if (cmd->seq_list[i].seq_send_order == cmd->seq_send_order) {
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cmd->seq_send_order++;
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return &cmd->seq_list[i];
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}
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}
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return NULL;
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}
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struct iscsi_r2t *iscsit_get_holder_for_r2tsn(
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struct iscsi_cmd *cmd,
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u32 r2t_sn)
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{
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struct iscsi_r2t *r2t;
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spin_lock_bh(&cmd->r2t_lock);
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list_for_each_entry(r2t, &cmd->cmd_r2t_list, r2t_list) {
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if (r2t->r2t_sn == r2t_sn) {
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spin_unlock_bh(&cmd->r2t_lock);
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return r2t;
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}
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}
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spin_unlock_bh(&cmd->r2t_lock);
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return NULL;
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}
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static inline int iscsit_check_received_cmdsn(struct iscsi_session *sess, u32 cmdsn)
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{
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u32 max_cmdsn;
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int ret;
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/*
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* This is the proper method of checking received CmdSN against
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* ExpCmdSN and MaxCmdSN values, as well as accounting for out
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* or order CmdSNs due to multiple connection sessions and/or
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* CRC failures.
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*/
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max_cmdsn = atomic_read(&sess->max_cmd_sn);
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if (iscsi_sna_gt(cmdsn, max_cmdsn)) {
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pr_err("Received CmdSN: 0x%08x is greater than"
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" MaxCmdSN: 0x%08x, ignoring.\n", cmdsn, max_cmdsn);
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ret = CMDSN_MAXCMDSN_OVERRUN;
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} else if (cmdsn == sess->exp_cmd_sn) {
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sess->exp_cmd_sn++;
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pr_debug("Received CmdSN matches ExpCmdSN,"
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" incremented ExpCmdSN to: 0x%08x\n",
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sess->exp_cmd_sn);
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ret = CMDSN_NORMAL_OPERATION;
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} else if (iscsi_sna_gt(cmdsn, sess->exp_cmd_sn)) {
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pr_debug("Received CmdSN: 0x%08x is greater"
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" than ExpCmdSN: 0x%08x, not acknowledging.\n",
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cmdsn, sess->exp_cmd_sn);
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ret = CMDSN_HIGHER_THAN_EXP;
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} else {
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pr_err("Received CmdSN: 0x%08x is less than"
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" ExpCmdSN: 0x%08x, ignoring.\n", cmdsn,
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sess->exp_cmd_sn);
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ret = CMDSN_LOWER_THAN_EXP;
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}
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return ret;
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}
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/*
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* Commands may be received out of order if MC/S is in use.
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* Ensure they are executed in CmdSN order.
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*/
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int iscsit_sequence_cmd(struct iscsi_conn *conn, struct iscsi_cmd *cmd,
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unsigned char *buf, __be32 cmdsn)
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{
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int ret, cmdsn_ret;
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bool reject = false;
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u8 reason = ISCSI_REASON_BOOKMARK_NO_RESOURCES;
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mutex_lock(&conn->sess->cmdsn_mutex);
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cmdsn_ret = iscsit_check_received_cmdsn(conn->sess, be32_to_cpu(cmdsn));
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switch (cmdsn_ret) {
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case CMDSN_NORMAL_OPERATION:
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ret = iscsit_execute_cmd(cmd, 0);
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if ((ret >= 0) && !list_empty(&conn->sess->sess_ooo_cmdsn_list))
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iscsit_execute_ooo_cmdsns(conn->sess);
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else if (ret < 0) {
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reject = true;
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ret = CMDSN_ERROR_CANNOT_RECOVER;
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}
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break;
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case CMDSN_HIGHER_THAN_EXP:
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ret = iscsit_handle_ooo_cmdsn(conn->sess, cmd, be32_to_cpu(cmdsn));
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if (ret < 0) {
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reject = true;
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ret = CMDSN_ERROR_CANNOT_RECOVER;
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break;
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}
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ret = CMDSN_HIGHER_THAN_EXP;
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break;
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case CMDSN_LOWER_THAN_EXP:
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case CMDSN_MAXCMDSN_OVERRUN:
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default:
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cmd->i_state = ISTATE_REMOVE;
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iscsit_add_cmd_to_immediate_queue(cmd, conn, cmd->i_state);
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/*
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* Existing callers for iscsit_sequence_cmd() will silently
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* ignore commands with CMDSN_LOWER_THAN_EXP, so force this
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* return for CMDSN_MAXCMDSN_OVERRUN as well..
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*/
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ret = CMDSN_LOWER_THAN_EXP;
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break;
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}
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mutex_unlock(&conn->sess->cmdsn_mutex);
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if (reject)
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iscsit_reject_cmd(cmd, reason, buf);
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return ret;
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}
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EXPORT_SYMBOL(iscsit_sequence_cmd);
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int iscsit_check_unsolicited_dataout(struct iscsi_cmd *cmd, unsigned char *buf)
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{
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struct iscsi_conn *conn = cmd->conn;
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struct se_cmd *se_cmd = &cmd->se_cmd;
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struct iscsi_data *hdr = (struct iscsi_data *) buf;
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u32 payload_length = ntoh24(hdr->dlength);
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if (conn->sess->sess_ops->InitialR2T) {
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pr_err("Received unexpected unsolicited data"
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" while InitialR2T=Yes, protocol error.\n");
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transport_send_check_condition_and_sense(se_cmd,
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TCM_UNEXPECTED_UNSOLICITED_DATA, 0);
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return -1;
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}
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if ((cmd->first_burst_len + payload_length) >
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conn->sess->sess_ops->FirstBurstLength) {
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pr_err("Total %u bytes exceeds FirstBurstLength: %u"
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" for this Unsolicited DataOut Burst.\n",
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(cmd->first_burst_len + payload_length),
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conn->sess->sess_ops->FirstBurstLength);
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transport_send_check_condition_and_sense(se_cmd,
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TCM_INCORRECT_AMOUNT_OF_DATA, 0);
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return -1;
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}
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if (!(hdr->flags & ISCSI_FLAG_CMD_FINAL))
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return 0;
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if (((cmd->first_burst_len + payload_length) != cmd->se_cmd.data_length) &&
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((cmd->first_burst_len + payload_length) !=
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conn->sess->sess_ops->FirstBurstLength)) {
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pr_err("Unsolicited non-immediate data received %u"
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" does not equal FirstBurstLength: %u, and does"
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" not equal ExpXferLen %u.\n",
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(cmd->first_burst_len + payload_length),
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conn->sess->sess_ops->FirstBurstLength, cmd->se_cmd.data_length);
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transport_send_check_condition_and_sense(se_cmd,
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TCM_INCORRECT_AMOUNT_OF_DATA, 0);
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return -1;
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}
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return 0;
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}
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struct iscsi_cmd *iscsit_find_cmd_from_itt(
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struct iscsi_conn *conn,
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itt_t init_task_tag)
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{
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struct iscsi_cmd *cmd;
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spin_lock_bh(&conn->cmd_lock);
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list_for_each_entry(cmd, &conn->conn_cmd_list, i_conn_node) {
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if (cmd->init_task_tag == init_task_tag) {
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spin_unlock_bh(&conn->cmd_lock);
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return cmd;
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}
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}
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spin_unlock_bh(&conn->cmd_lock);
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pr_err("Unable to locate ITT: 0x%08x on CID: %hu",
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init_task_tag, conn->cid);
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return NULL;
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}
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EXPORT_SYMBOL(iscsit_find_cmd_from_itt);
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struct iscsi_cmd *iscsit_find_cmd_from_itt_or_dump(
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struct iscsi_conn *conn,
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itt_t init_task_tag,
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u32 length)
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{
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struct iscsi_cmd *cmd;
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spin_lock_bh(&conn->cmd_lock);
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list_for_each_entry(cmd, &conn->conn_cmd_list, i_conn_node) {
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if (cmd->cmd_flags & ICF_GOT_LAST_DATAOUT)
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continue;
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if (cmd->init_task_tag == init_task_tag) {
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spin_unlock_bh(&conn->cmd_lock);
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return cmd;
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}
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}
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spin_unlock_bh(&conn->cmd_lock);
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pr_err("Unable to locate ITT: 0x%08x on CID: %hu,"
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" dumping payload\n", init_task_tag, conn->cid);
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if (length)
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iscsit_dump_data_payload(conn, length, 1);
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return NULL;
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}
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EXPORT_SYMBOL(iscsit_find_cmd_from_itt_or_dump);
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struct iscsi_cmd *iscsit_find_cmd_from_ttt(
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struct iscsi_conn *conn,
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u32 targ_xfer_tag)
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{
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struct iscsi_cmd *cmd = NULL;
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spin_lock_bh(&conn->cmd_lock);
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list_for_each_entry(cmd, &conn->conn_cmd_list, i_conn_node) {
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if (cmd->targ_xfer_tag == targ_xfer_tag) {
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spin_unlock_bh(&conn->cmd_lock);
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return cmd;
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}
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}
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spin_unlock_bh(&conn->cmd_lock);
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pr_err("Unable to locate TTT: 0x%08x on CID: %hu\n",
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targ_xfer_tag, conn->cid);
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return NULL;
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}
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|
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int iscsit_find_cmd_for_recovery(
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struct iscsi_session *sess,
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struct iscsi_cmd **cmd_ptr,
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struct iscsi_conn_recovery **cr_ptr,
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itt_t init_task_tag)
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{
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struct iscsi_cmd *cmd = NULL;
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struct iscsi_conn_recovery *cr;
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/*
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* Scan through the inactive connection recovery list's command list.
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* If init_task_tag matches the command is still alligent.
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*/
|
|
spin_lock(&sess->cr_i_lock);
|
|
list_for_each_entry(cr, &sess->cr_inactive_list, cr_list) {
|
|
spin_lock(&cr->conn_recovery_cmd_lock);
|
|
list_for_each_entry(cmd, &cr->conn_recovery_cmd_list, i_conn_node) {
|
|
if (cmd->init_task_tag == init_task_tag) {
|
|
spin_unlock(&cr->conn_recovery_cmd_lock);
|
|
spin_unlock(&sess->cr_i_lock);
|
|
|
|
*cr_ptr = cr;
|
|
*cmd_ptr = cmd;
|
|
return -2;
|
|
}
|
|
}
|
|
spin_unlock(&cr->conn_recovery_cmd_lock);
|
|
}
|
|
spin_unlock(&sess->cr_i_lock);
|
|
/*
|
|
* Scan through the active connection recovery list's command list.
|
|
* If init_task_tag matches the command is ready to be reassigned.
|
|
*/
|
|
spin_lock(&sess->cr_a_lock);
|
|
list_for_each_entry(cr, &sess->cr_active_list, cr_list) {
|
|
spin_lock(&cr->conn_recovery_cmd_lock);
|
|
list_for_each_entry(cmd, &cr->conn_recovery_cmd_list, i_conn_node) {
|
|
if (cmd->init_task_tag == init_task_tag) {
|
|
spin_unlock(&cr->conn_recovery_cmd_lock);
|
|
spin_unlock(&sess->cr_a_lock);
|
|
|
|
*cr_ptr = cr;
|
|
*cmd_ptr = cmd;
|
|
return 0;
|
|
}
|
|
}
|
|
spin_unlock(&cr->conn_recovery_cmd_lock);
|
|
}
|
|
spin_unlock(&sess->cr_a_lock);
|
|
|
|
return -1;
|
|
}
|
|
|
|
void iscsit_add_cmd_to_immediate_queue(
|
|
struct iscsi_cmd *cmd,
|
|
struct iscsi_conn *conn,
|
|
u8 state)
|
|
{
|
|
struct iscsi_queue_req *qr;
|
|
|
|
qr = kmem_cache_zalloc(lio_qr_cache, GFP_ATOMIC);
|
|
if (!qr) {
|
|
pr_err("Unable to allocate memory for"
|
|
" struct iscsi_queue_req\n");
|
|
return;
|
|
}
|
|
INIT_LIST_HEAD(&qr->qr_list);
|
|
qr->cmd = cmd;
|
|
qr->state = state;
|
|
|
|
spin_lock_bh(&conn->immed_queue_lock);
|
|
list_add_tail(&qr->qr_list, &conn->immed_queue_list);
|
|
atomic_inc(&cmd->immed_queue_count);
|
|
atomic_set(&conn->check_immediate_queue, 1);
|
|
spin_unlock_bh(&conn->immed_queue_lock);
|
|
|
|
wake_up(&conn->queues_wq);
|
|
}
|
|
EXPORT_SYMBOL(iscsit_add_cmd_to_immediate_queue);
|
|
|
|
struct iscsi_queue_req *iscsit_get_cmd_from_immediate_queue(struct iscsi_conn *conn)
|
|
{
|
|
struct iscsi_queue_req *qr;
|
|
|
|
spin_lock_bh(&conn->immed_queue_lock);
|
|
if (list_empty(&conn->immed_queue_list)) {
|
|
spin_unlock_bh(&conn->immed_queue_lock);
|
|
return NULL;
|
|
}
|
|
qr = list_first_entry(&conn->immed_queue_list,
|
|
struct iscsi_queue_req, qr_list);
|
|
|
|
list_del(&qr->qr_list);
|
|
if (qr->cmd)
|
|
atomic_dec(&qr->cmd->immed_queue_count);
|
|
spin_unlock_bh(&conn->immed_queue_lock);
|
|
|
|
return qr;
|
|
}
|
|
|
|
static void iscsit_remove_cmd_from_immediate_queue(
|
|
struct iscsi_cmd *cmd,
|
|
struct iscsi_conn *conn)
|
|
{
|
|
struct iscsi_queue_req *qr, *qr_tmp;
|
|
|
|
spin_lock_bh(&conn->immed_queue_lock);
|
|
if (!atomic_read(&cmd->immed_queue_count)) {
|
|
spin_unlock_bh(&conn->immed_queue_lock);
|
|
return;
|
|
}
|
|
|
|
list_for_each_entry_safe(qr, qr_tmp, &conn->immed_queue_list, qr_list) {
|
|
if (qr->cmd != cmd)
|
|
continue;
|
|
|
|
atomic_dec(&qr->cmd->immed_queue_count);
|
|
list_del(&qr->qr_list);
|
|
kmem_cache_free(lio_qr_cache, qr);
|
|
}
|
|
spin_unlock_bh(&conn->immed_queue_lock);
|
|
|
|
if (atomic_read(&cmd->immed_queue_count)) {
|
|
pr_err("ITT: 0x%08x immed_queue_count: %d\n",
|
|
cmd->init_task_tag,
|
|
atomic_read(&cmd->immed_queue_count));
|
|
}
|
|
}
|
|
|
|
void iscsit_add_cmd_to_response_queue(
|
|
struct iscsi_cmd *cmd,
|
|
struct iscsi_conn *conn,
|
|
u8 state)
|
|
{
|
|
struct iscsi_queue_req *qr;
|
|
|
|
qr = kmem_cache_zalloc(lio_qr_cache, GFP_ATOMIC);
|
|
if (!qr) {
|
|
pr_err("Unable to allocate memory for"
|
|
" struct iscsi_queue_req\n");
|
|
return;
|
|
}
|
|
INIT_LIST_HEAD(&qr->qr_list);
|
|
qr->cmd = cmd;
|
|
qr->state = state;
|
|
|
|
spin_lock_bh(&conn->response_queue_lock);
|
|
list_add_tail(&qr->qr_list, &conn->response_queue_list);
|
|
atomic_inc(&cmd->response_queue_count);
|
|
spin_unlock_bh(&conn->response_queue_lock);
|
|
|
|
wake_up(&conn->queues_wq);
|
|
}
|
|
|
|
struct iscsi_queue_req *iscsit_get_cmd_from_response_queue(struct iscsi_conn *conn)
|
|
{
|
|
struct iscsi_queue_req *qr;
|
|
|
|
spin_lock_bh(&conn->response_queue_lock);
|
|
if (list_empty(&conn->response_queue_list)) {
|
|
spin_unlock_bh(&conn->response_queue_lock);
|
|
return NULL;
|
|
}
|
|
|
|
qr = list_first_entry(&conn->response_queue_list,
|
|
struct iscsi_queue_req, qr_list);
|
|
|
|
list_del(&qr->qr_list);
|
|
if (qr->cmd)
|
|
atomic_dec(&qr->cmd->response_queue_count);
|
|
spin_unlock_bh(&conn->response_queue_lock);
|
|
|
|
return qr;
|
|
}
|
|
|
|
static void iscsit_remove_cmd_from_response_queue(
|
|
struct iscsi_cmd *cmd,
|
|
struct iscsi_conn *conn)
|
|
{
|
|
struct iscsi_queue_req *qr, *qr_tmp;
|
|
|
|
spin_lock_bh(&conn->response_queue_lock);
|
|
if (!atomic_read(&cmd->response_queue_count)) {
|
|
spin_unlock_bh(&conn->response_queue_lock);
|
|
return;
|
|
}
|
|
|
|
list_for_each_entry_safe(qr, qr_tmp, &conn->response_queue_list,
|
|
qr_list) {
|
|
if (qr->cmd != cmd)
|
|
continue;
|
|
|
|
atomic_dec(&qr->cmd->response_queue_count);
|
|
list_del(&qr->qr_list);
|
|
kmem_cache_free(lio_qr_cache, qr);
|
|
}
|
|
spin_unlock_bh(&conn->response_queue_lock);
|
|
|
|
if (atomic_read(&cmd->response_queue_count)) {
|
|
pr_err("ITT: 0x%08x response_queue_count: %d\n",
|
|
cmd->init_task_tag,
|
|
atomic_read(&cmd->response_queue_count));
|
|
}
|
|
}
|
|
|
|
bool iscsit_conn_all_queues_empty(struct iscsi_conn *conn)
|
|
{
|
|
bool empty;
|
|
|
|
spin_lock_bh(&conn->immed_queue_lock);
|
|
empty = list_empty(&conn->immed_queue_list);
|
|
spin_unlock_bh(&conn->immed_queue_lock);
|
|
|
|
if (!empty)
|
|
return empty;
|
|
|
|
spin_lock_bh(&conn->response_queue_lock);
|
|
empty = list_empty(&conn->response_queue_list);
|
|
spin_unlock_bh(&conn->response_queue_lock);
|
|
|
|
return empty;
|
|
}
|
|
|
|
void iscsit_free_queue_reqs_for_conn(struct iscsi_conn *conn)
|
|
{
|
|
struct iscsi_queue_req *qr, *qr_tmp;
|
|
|
|
spin_lock_bh(&conn->immed_queue_lock);
|
|
list_for_each_entry_safe(qr, qr_tmp, &conn->immed_queue_list, qr_list) {
|
|
list_del(&qr->qr_list);
|
|
if (qr->cmd)
|
|
atomic_dec(&qr->cmd->immed_queue_count);
|
|
|
|
kmem_cache_free(lio_qr_cache, qr);
|
|
}
|
|
spin_unlock_bh(&conn->immed_queue_lock);
|
|
|
|
spin_lock_bh(&conn->response_queue_lock);
|
|
list_for_each_entry_safe(qr, qr_tmp, &conn->response_queue_list,
|
|
qr_list) {
|
|
list_del(&qr->qr_list);
|
|
if (qr->cmd)
|
|
atomic_dec(&qr->cmd->response_queue_count);
|
|
|
|
kmem_cache_free(lio_qr_cache, qr);
|
|
}
|
|
spin_unlock_bh(&conn->response_queue_lock);
|
|
}
|
|
|
|
void iscsit_release_cmd(struct iscsi_cmd *cmd)
|
|
{
|
|
struct iscsi_session *sess;
|
|
struct se_cmd *se_cmd = &cmd->se_cmd;
|
|
|
|
if (cmd->conn)
|
|
sess = cmd->conn->sess;
|
|
else
|
|
sess = cmd->sess;
|
|
|
|
BUG_ON(!sess || !sess->se_sess);
|
|
|
|
kfree(cmd->buf_ptr);
|
|
kfree(cmd->pdu_list);
|
|
kfree(cmd->seq_list);
|
|
kfree(cmd->tmr_req);
|
|
kfree(cmd->iov_data);
|
|
kfree(cmd->text_in_ptr);
|
|
|
|
percpu_ida_free(&sess->se_sess->sess_tag_pool, se_cmd->map_tag);
|
|
}
|
|
EXPORT_SYMBOL(iscsit_release_cmd);
|
|
|
|
void __iscsit_free_cmd(struct iscsi_cmd *cmd, bool scsi_cmd,
|
|
bool check_queues)
|
|
{
|
|
struct iscsi_conn *conn = cmd->conn;
|
|
|
|
if (scsi_cmd) {
|
|
if (cmd->data_direction == DMA_TO_DEVICE) {
|
|
iscsit_stop_dataout_timer(cmd);
|
|
iscsit_free_r2ts_from_list(cmd);
|
|
}
|
|
if (cmd->data_direction == DMA_FROM_DEVICE)
|
|
iscsit_free_all_datain_reqs(cmd);
|
|
}
|
|
|
|
if (conn && check_queues) {
|
|
iscsit_remove_cmd_from_immediate_queue(cmd, conn);
|
|
iscsit_remove_cmd_from_response_queue(cmd, conn);
|
|
}
|
|
|
|
if (conn && conn->conn_transport->iscsit_release_cmd)
|
|
conn->conn_transport->iscsit_release_cmd(conn, cmd);
|
|
}
|
|
|
|
void iscsit_free_cmd(struct iscsi_cmd *cmd, bool shutdown)
|
|
{
|
|
struct se_cmd *se_cmd = NULL;
|
|
int rc;
|
|
/*
|
|
* Determine if a struct se_cmd is associated with
|
|
* this struct iscsi_cmd.
|
|
*/
|
|
switch (cmd->iscsi_opcode) {
|
|
case ISCSI_OP_SCSI_CMD:
|
|
se_cmd = &cmd->se_cmd;
|
|
__iscsit_free_cmd(cmd, true, shutdown);
|
|
/*
|
|
* Fallthrough
|
|
*/
|
|
case ISCSI_OP_SCSI_TMFUNC:
|
|
rc = transport_generic_free_cmd(&cmd->se_cmd, shutdown);
|
|
if (!rc && shutdown && se_cmd && se_cmd->se_sess) {
|
|
__iscsit_free_cmd(cmd, true, shutdown);
|
|
target_put_sess_cmd(se_cmd);
|
|
}
|
|
break;
|
|
case ISCSI_OP_REJECT:
|
|
/*
|
|
* Handle special case for REJECT when iscsi_add_reject*() has
|
|
* overwritten the original iscsi_opcode assignment, and the
|
|
* associated cmd->se_cmd needs to be released.
|
|
*/
|
|
if (cmd->se_cmd.se_tfo != NULL) {
|
|
se_cmd = &cmd->se_cmd;
|
|
__iscsit_free_cmd(cmd, true, shutdown);
|
|
|
|
rc = transport_generic_free_cmd(&cmd->se_cmd, shutdown);
|
|
if (!rc && shutdown && se_cmd->se_sess) {
|
|
__iscsit_free_cmd(cmd, true, shutdown);
|
|
target_put_sess_cmd(se_cmd);
|
|
}
|
|
break;
|
|
}
|
|
/* Fall-through */
|
|
default:
|
|
__iscsit_free_cmd(cmd, false, shutdown);
|
|
iscsit_release_cmd(cmd);
|
|
break;
|
|
}
|
|
}
|
|
EXPORT_SYMBOL(iscsit_free_cmd);
|
|
|
|
int iscsit_check_session_usage_count(struct iscsi_session *sess)
|
|
{
|
|
spin_lock_bh(&sess->session_usage_lock);
|
|
if (sess->session_usage_count != 0) {
|
|
sess->session_waiting_on_uc = 1;
|
|
spin_unlock_bh(&sess->session_usage_lock);
|
|
if (in_interrupt())
|
|
return 2;
|
|
|
|
wait_for_completion(&sess->session_waiting_on_uc_comp);
|
|
return 1;
|
|
}
|
|
spin_unlock_bh(&sess->session_usage_lock);
|
|
|
|
return 0;
|
|
}
|
|
|
|
void iscsit_dec_session_usage_count(struct iscsi_session *sess)
|
|
{
|
|
spin_lock_bh(&sess->session_usage_lock);
|
|
sess->session_usage_count--;
|
|
|
|
if (!sess->session_usage_count && sess->session_waiting_on_uc)
|
|
complete(&sess->session_waiting_on_uc_comp);
|
|
|
|
spin_unlock_bh(&sess->session_usage_lock);
|
|
}
|
|
|
|
void iscsit_inc_session_usage_count(struct iscsi_session *sess)
|
|
{
|
|
spin_lock_bh(&sess->session_usage_lock);
|
|
sess->session_usage_count++;
|
|
spin_unlock_bh(&sess->session_usage_lock);
|
|
}
|
|
|
|
struct iscsi_conn *iscsit_get_conn_from_cid(struct iscsi_session *sess, u16 cid)
|
|
{
|
|
struct iscsi_conn *conn;
|
|
|
|
spin_lock_bh(&sess->conn_lock);
|
|
list_for_each_entry(conn, &sess->sess_conn_list, conn_list) {
|
|
if ((conn->cid == cid) &&
|
|
(conn->conn_state == TARG_CONN_STATE_LOGGED_IN)) {
|
|
iscsit_inc_conn_usage_count(conn);
|
|
spin_unlock_bh(&sess->conn_lock);
|
|
return conn;
|
|
}
|
|
}
|
|
spin_unlock_bh(&sess->conn_lock);
|
|
|
|
return NULL;
|
|
}
|
|
|
|
struct iscsi_conn *iscsit_get_conn_from_cid_rcfr(struct iscsi_session *sess, u16 cid)
|
|
{
|
|
struct iscsi_conn *conn;
|
|
|
|
spin_lock_bh(&sess->conn_lock);
|
|
list_for_each_entry(conn, &sess->sess_conn_list, conn_list) {
|
|
if (conn->cid == cid) {
|
|
iscsit_inc_conn_usage_count(conn);
|
|
spin_lock(&conn->state_lock);
|
|
atomic_set(&conn->connection_wait_rcfr, 1);
|
|
spin_unlock(&conn->state_lock);
|
|
spin_unlock_bh(&sess->conn_lock);
|
|
return conn;
|
|
}
|
|
}
|
|
spin_unlock_bh(&sess->conn_lock);
|
|
|
|
return NULL;
|
|
}
|
|
|
|
void iscsit_check_conn_usage_count(struct iscsi_conn *conn)
|
|
{
|
|
spin_lock_bh(&conn->conn_usage_lock);
|
|
if (conn->conn_usage_count != 0) {
|
|
conn->conn_waiting_on_uc = 1;
|
|
spin_unlock_bh(&conn->conn_usage_lock);
|
|
|
|
wait_for_completion(&conn->conn_waiting_on_uc_comp);
|
|
return;
|
|
}
|
|
spin_unlock_bh(&conn->conn_usage_lock);
|
|
}
|
|
|
|
void iscsit_dec_conn_usage_count(struct iscsi_conn *conn)
|
|
{
|
|
spin_lock_bh(&conn->conn_usage_lock);
|
|
conn->conn_usage_count--;
|
|
|
|
if (!conn->conn_usage_count && conn->conn_waiting_on_uc)
|
|
complete(&conn->conn_waiting_on_uc_comp);
|
|
|
|
spin_unlock_bh(&conn->conn_usage_lock);
|
|
}
|
|
|
|
void iscsit_inc_conn_usage_count(struct iscsi_conn *conn)
|
|
{
|
|
spin_lock_bh(&conn->conn_usage_lock);
|
|
conn->conn_usage_count++;
|
|
spin_unlock_bh(&conn->conn_usage_lock);
|
|
}
|
|
|
|
static int iscsit_add_nopin(struct iscsi_conn *conn, int want_response)
|
|
{
|
|
u8 state;
|
|
struct iscsi_cmd *cmd;
|
|
|
|
cmd = iscsit_allocate_cmd(conn, TASK_RUNNING);
|
|
if (!cmd)
|
|
return -1;
|
|
|
|
cmd->iscsi_opcode = ISCSI_OP_NOOP_IN;
|
|
state = (want_response) ? ISTATE_SEND_NOPIN_WANT_RESPONSE :
|
|
ISTATE_SEND_NOPIN_NO_RESPONSE;
|
|
cmd->init_task_tag = RESERVED_ITT;
|
|
cmd->targ_xfer_tag = (want_response) ?
|
|
session_get_next_ttt(conn->sess) : 0xFFFFFFFF;
|
|
spin_lock_bh(&conn->cmd_lock);
|
|
list_add_tail(&cmd->i_conn_node, &conn->conn_cmd_list);
|
|
spin_unlock_bh(&conn->cmd_lock);
|
|
|
|
if (want_response)
|
|
iscsit_start_nopin_response_timer(conn);
|
|
iscsit_add_cmd_to_immediate_queue(cmd, conn, state);
|
|
|
|
return 0;
|
|
}
|
|
|
|
static void iscsit_handle_nopin_response_timeout(unsigned long data)
|
|
{
|
|
struct iscsi_conn *conn = (struct iscsi_conn *) data;
|
|
|
|
iscsit_inc_conn_usage_count(conn);
|
|
|
|
spin_lock_bh(&conn->nopin_timer_lock);
|
|
if (conn->nopin_response_timer_flags & ISCSI_TF_STOP) {
|
|
spin_unlock_bh(&conn->nopin_timer_lock);
|
|
iscsit_dec_conn_usage_count(conn);
|
|
return;
|
|
}
|
|
|
|
pr_debug("Did not receive response to NOPIN on CID: %hu on"
|
|
" SID: %u, failing connection.\n", conn->cid,
|
|
conn->sess->sid);
|
|
conn->nopin_response_timer_flags &= ~ISCSI_TF_RUNNING;
|
|
spin_unlock_bh(&conn->nopin_timer_lock);
|
|
|
|
{
|
|
struct iscsi_portal_group *tpg = conn->sess->tpg;
|
|
struct iscsi_tiqn *tiqn = tpg->tpg_tiqn;
|
|
|
|
if (tiqn) {
|
|
spin_lock_bh(&tiqn->sess_err_stats.lock);
|
|
strcpy(tiqn->sess_err_stats.last_sess_fail_rem_name,
|
|
conn->sess->sess_ops->InitiatorName);
|
|
tiqn->sess_err_stats.last_sess_failure_type =
|
|
ISCSI_SESS_ERR_CXN_TIMEOUT;
|
|
tiqn->sess_err_stats.cxn_timeout_errors++;
|
|
atomic_long_inc(&conn->sess->conn_timeout_errors);
|
|
spin_unlock_bh(&tiqn->sess_err_stats.lock);
|
|
}
|
|
}
|
|
|
|
iscsit_cause_connection_reinstatement(conn, 0);
|
|
iscsit_dec_conn_usage_count(conn);
|
|
}
|
|
|
|
void iscsit_mod_nopin_response_timer(struct iscsi_conn *conn)
|
|
{
|
|
struct iscsi_session *sess = conn->sess;
|
|
struct iscsi_node_attrib *na = iscsit_tpg_get_node_attrib(sess);
|
|
|
|
spin_lock_bh(&conn->nopin_timer_lock);
|
|
if (!(conn->nopin_response_timer_flags & ISCSI_TF_RUNNING)) {
|
|
spin_unlock_bh(&conn->nopin_timer_lock);
|
|
return;
|
|
}
|
|
|
|
mod_timer(&conn->nopin_response_timer,
|
|
(get_jiffies_64() + na->nopin_response_timeout * HZ));
|
|
spin_unlock_bh(&conn->nopin_timer_lock);
|
|
}
|
|
|
|
/*
|
|
* Called with conn->nopin_timer_lock held.
|
|
*/
|
|
void iscsit_start_nopin_response_timer(struct iscsi_conn *conn)
|
|
{
|
|
struct iscsi_session *sess = conn->sess;
|
|
struct iscsi_node_attrib *na = iscsit_tpg_get_node_attrib(sess);
|
|
|
|
spin_lock_bh(&conn->nopin_timer_lock);
|
|
if (conn->nopin_response_timer_flags & ISCSI_TF_RUNNING) {
|
|
spin_unlock_bh(&conn->nopin_timer_lock);
|
|
return;
|
|
}
|
|
|
|
init_timer(&conn->nopin_response_timer);
|
|
conn->nopin_response_timer.expires =
|
|
(get_jiffies_64() + na->nopin_response_timeout * HZ);
|
|
conn->nopin_response_timer.data = (unsigned long)conn;
|
|
conn->nopin_response_timer.function = iscsit_handle_nopin_response_timeout;
|
|
conn->nopin_response_timer_flags &= ~ISCSI_TF_STOP;
|
|
conn->nopin_response_timer_flags |= ISCSI_TF_RUNNING;
|
|
add_timer(&conn->nopin_response_timer);
|
|
|
|
pr_debug("Started NOPIN Response Timer on CID: %d to %u"
|
|
" seconds\n", conn->cid, na->nopin_response_timeout);
|
|
spin_unlock_bh(&conn->nopin_timer_lock);
|
|
}
|
|
|
|
void iscsit_stop_nopin_response_timer(struct iscsi_conn *conn)
|
|
{
|
|
spin_lock_bh(&conn->nopin_timer_lock);
|
|
if (!(conn->nopin_response_timer_flags & ISCSI_TF_RUNNING)) {
|
|
spin_unlock_bh(&conn->nopin_timer_lock);
|
|
return;
|
|
}
|
|
conn->nopin_response_timer_flags |= ISCSI_TF_STOP;
|
|
spin_unlock_bh(&conn->nopin_timer_lock);
|
|
|
|
del_timer_sync(&conn->nopin_response_timer);
|
|
|
|
spin_lock_bh(&conn->nopin_timer_lock);
|
|
conn->nopin_response_timer_flags &= ~ISCSI_TF_RUNNING;
|
|
spin_unlock_bh(&conn->nopin_timer_lock);
|
|
}
|
|
|
|
static void iscsit_handle_nopin_timeout(unsigned long data)
|
|
{
|
|
struct iscsi_conn *conn = (struct iscsi_conn *) data;
|
|
|
|
iscsit_inc_conn_usage_count(conn);
|
|
|
|
spin_lock_bh(&conn->nopin_timer_lock);
|
|
if (conn->nopin_timer_flags & ISCSI_TF_STOP) {
|
|
spin_unlock_bh(&conn->nopin_timer_lock);
|
|
iscsit_dec_conn_usage_count(conn);
|
|
return;
|
|
}
|
|
conn->nopin_timer_flags &= ~ISCSI_TF_RUNNING;
|
|
spin_unlock_bh(&conn->nopin_timer_lock);
|
|
|
|
iscsit_add_nopin(conn, 1);
|
|
iscsit_dec_conn_usage_count(conn);
|
|
}
|
|
|
|
/*
|
|
* Called with conn->nopin_timer_lock held.
|
|
*/
|
|
void __iscsit_start_nopin_timer(struct iscsi_conn *conn)
|
|
{
|
|
struct iscsi_session *sess = conn->sess;
|
|
struct iscsi_node_attrib *na = iscsit_tpg_get_node_attrib(sess);
|
|
/*
|
|
* NOPIN timeout is disabled.
|
|
*/
|
|
if (!na->nopin_timeout)
|
|
return;
|
|
|
|
if (conn->nopin_timer_flags & ISCSI_TF_RUNNING)
|
|
return;
|
|
|
|
init_timer(&conn->nopin_timer);
|
|
conn->nopin_timer.expires = (get_jiffies_64() + na->nopin_timeout * HZ);
|
|
conn->nopin_timer.data = (unsigned long)conn;
|
|
conn->nopin_timer.function = iscsit_handle_nopin_timeout;
|
|
conn->nopin_timer_flags &= ~ISCSI_TF_STOP;
|
|
conn->nopin_timer_flags |= ISCSI_TF_RUNNING;
|
|
add_timer(&conn->nopin_timer);
|
|
|
|
pr_debug("Started NOPIN Timer on CID: %d at %u second"
|
|
" interval\n", conn->cid, na->nopin_timeout);
|
|
}
|
|
|
|
void iscsit_start_nopin_timer(struct iscsi_conn *conn)
|
|
{
|
|
struct iscsi_session *sess = conn->sess;
|
|
struct iscsi_node_attrib *na = iscsit_tpg_get_node_attrib(sess);
|
|
/*
|
|
* NOPIN timeout is disabled..
|
|
*/
|
|
if (!na->nopin_timeout)
|
|
return;
|
|
|
|
spin_lock_bh(&conn->nopin_timer_lock);
|
|
if (conn->nopin_timer_flags & ISCSI_TF_RUNNING) {
|
|
spin_unlock_bh(&conn->nopin_timer_lock);
|
|
return;
|
|
}
|
|
|
|
init_timer(&conn->nopin_timer);
|
|
conn->nopin_timer.expires = (get_jiffies_64() + na->nopin_timeout * HZ);
|
|
conn->nopin_timer.data = (unsigned long)conn;
|
|
conn->nopin_timer.function = iscsit_handle_nopin_timeout;
|
|
conn->nopin_timer_flags &= ~ISCSI_TF_STOP;
|
|
conn->nopin_timer_flags |= ISCSI_TF_RUNNING;
|
|
add_timer(&conn->nopin_timer);
|
|
|
|
pr_debug("Started NOPIN Timer on CID: %d at %u second"
|
|
" interval\n", conn->cid, na->nopin_timeout);
|
|
spin_unlock_bh(&conn->nopin_timer_lock);
|
|
}
|
|
|
|
void iscsit_stop_nopin_timer(struct iscsi_conn *conn)
|
|
{
|
|
spin_lock_bh(&conn->nopin_timer_lock);
|
|
if (!(conn->nopin_timer_flags & ISCSI_TF_RUNNING)) {
|
|
spin_unlock_bh(&conn->nopin_timer_lock);
|
|
return;
|
|
}
|
|
conn->nopin_timer_flags |= ISCSI_TF_STOP;
|
|
spin_unlock_bh(&conn->nopin_timer_lock);
|
|
|
|
del_timer_sync(&conn->nopin_timer);
|
|
|
|
spin_lock_bh(&conn->nopin_timer_lock);
|
|
conn->nopin_timer_flags &= ~ISCSI_TF_RUNNING;
|
|
spin_unlock_bh(&conn->nopin_timer_lock);
|
|
}
|
|
|
|
int iscsit_send_tx_data(
|
|
struct iscsi_cmd *cmd,
|
|
struct iscsi_conn *conn,
|
|
int use_misc)
|
|
{
|
|
int tx_sent, tx_size;
|
|
u32 iov_count;
|
|
struct kvec *iov;
|
|
|
|
send_data:
|
|
tx_size = cmd->tx_size;
|
|
|
|
if (!use_misc) {
|
|
iov = &cmd->iov_data[0];
|
|
iov_count = cmd->iov_data_count;
|
|
} else {
|
|
iov = &cmd->iov_misc[0];
|
|
iov_count = cmd->iov_misc_count;
|
|
}
|
|
|
|
tx_sent = tx_data(conn, &iov[0], iov_count, tx_size);
|
|
if (tx_size != tx_sent) {
|
|
if (tx_sent == -EAGAIN) {
|
|
pr_err("tx_data() returned -EAGAIN\n");
|
|
goto send_data;
|
|
} else
|
|
return -1;
|
|
}
|
|
cmd->tx_size = 0;
|
|
|
|
return 0;
|
|
}
|
|
|
|
int iscsit_fe_sendpage_sg(
|
|
struct iscsi_cmd *cmd,
|
|
struct iscsi_conn *conn)
|
|
{
|
|
struct scatterlist *sg = cmd->first_data_sg;
|
|
struct kvec iov;
|
|
u32 tx_hdr_size, data_len;
|
|
u32 offset = cmd->first_data_sg_off;
|
|
int tx_sent, iov_off;
|
|
|
|
send_hdr:
|
|
tx_hdr_size = ISCSI_HDR_LEN;
|
|
if (conn->conn_ops->HeaderDigest)
|
|
tx_hdr_size += ISCSI_CRC_LEN;
|
|
|
|
iov.iov_base = cmd->pdu;
|
|
iov.iov_len = tx_hdr_size;
|
|
|
|
tx_sent = tx_data(conn, &iov, 1, tx_hdr_size);
|
|
if (tx_hdr_size != tx_sent) {
|
|
if (tx_sent == -EAGAIN) {
|
|
pr_err("tx_data() returned -EAGAIN\n");
|
|
goto send_hdr;
|
|
}
|
|
return -1;
|
|
}
|
|
|
|
data_len = cmd->tx_size - tx_hdr_size - cmd->padding;
|
|
/*
|
|
* Set iov_off used by padding and data digest tx_data() calls below
|
|
* in order to determine proper offset into cmd->iov_data[]
|
|
*/
|
|
if (conn->conn_ops->DataDigest) {
|
|
data_len -= ISCSI_CRC_LEN;
|
|
if (cmd->padding)
|
|
iov_off = (cmd->iov_data_count - 2);
|
|
else
|
|
iov_off = (cmd->iov_data_count - 1);
|
|
} else {
|
|
iov_off = (cmd->iov_data_count - 1);
|
|
}
|
|
/*
|
|
* Perform sendpage() for each page in the scatterlist
|
|
*/
|
|
while (data_len) {
|
|
u32 space = (sg->length - offset);
|
|
u32 sub_len = min_t(u32, data_len, space);
|
|
send_pg:
|
|
tx_sent = conn->sock->ops->sendpage(conn->sock,
|
|
sg_page(sg), sg->offset + offset, sub_len, 0);
|
|
if (tx_sent != sub_len) {
|
|
if (tx_sent == -EAGAIN) {
|
|
pr_err("tcp_sendpage() returned"
|
|
" -EAGAIN\n");
|
|
goto send_pg;
|
|
}
|
|
|
|
pr_err("tcp_sendpage() failure: %d\n",
|
|
tx_sent);
|
|
return -1;
|
|
}
|
|
|
|
data_len -= sub_len;
|
|
offset = 0;
|
|
sg = sg_next(sg);
|
|
}
|
|
|
|
send_padding:
|
|
if (cmd->padding) {
|
|
struct kvec *iov_p = &cmd->iov_data[iov_off++];
|
|
|
|
tx_sent = tx_data(conn, iov_p, 1, cmd->padding);
|
|
if (cmd->padding != tx_sent) {
|
|
if (tx_sent == -EAGAIN) {
|
|
pr_err("tx_data() returned -EAGAIN\n");
|
|
goto send_padding;
|
|
}
|
|
return -1;
|
|
}
|
|
}
|
|
|
|
send_datacrc:
|
|
if (conn->conn_ops->DataDigest) {
|
|
struct kvec *iov_d = &cmd->iov_data[iov_off];
|
|
|
|
tx_sent = tx_data(conn, iov_d, 1, ISCSI_CRC_LEN);
|
|
if (ISCSI_CRC_LEN != tx_sent) {
|
|
if (tx_sent == -EAGAIN) {
|
|
pr_err("tx_data() returned -EAGAIN\n");
|
|
goto send_datacrc;
|
|
}
|
|
return -1;
|
|
}
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
/*
|
|
* This function is used for mainly sending a ISCSI_TARG_LOGIN_RSP PDU
|
|
* back to the Initiator when an expection condition occurs with the
|
|
* errors set in status_class and status_detail.
|
|
*
|
|
* Parameters: iSCSI Connection, Status Class, Status Detail.
|
|
* Returns: 0 on success, -1 on error.
|
|
*/
|
|
int iscsit_tx_login_rsp(struct iscsi_conn *conn, u8 status_class, u8 status_detail)
|
|
{
|
|
struct iscsi_login_rsp *hdr;
|
|
struct iscsi_login *login = conn->conn_login;
|
|
|
|
login->login_failed = 1;
|
|
iscsit_collect_login_stats(conn, status_class, status_detail);
|
|
|
|
memset(&login->rsp[0], 0, ISCSI_HDR_LEN);
|
|
|
|
hdr = (struct iscsi_login_rsp *)&login->rsp[0];
|
|
hdr->opcode = ISCSI_OP_LOGIN_RSP;
|
|
hdr->status_class = status_class;
|
|
hdr->status_detail = status_detail;
|
|
hdr->itt = conn->login_itt;
|
|
|
|
return conn->conn_transport->iscsit_put_login_tx(conn, login, 0);
|
|
}
|
|
|
|
void iscsit_print_session_params(struct iscsi_session *sess)
|
|
{
|
|
struct iscsi_conn *conn;
|
|
|
|
pr_debug("-----------------------------[Session Params for"
|
|
" SID: %u]-----------------------------\n", sess->sid);
|
|
spin_lock_bh(&sess->conn_lock);
|
|
list_for_each_entry(conn, &sess->sess_conn_list, conn_list)
|
|
iscsi_dump_conn_ops(conn->conn_ops);
|
|
spin_unlock_bh(&sess->conn_lock);
|
|
|
|
iscsi_dump_sess_ops(sess->sess_ops);
|
|
}
|
|
|
|
static int iscsit_do_rx_data(
|
|
struct iscsi_conn *conn,
|
|
struct iscsi_data_count *count)
|
|
{
|
|
int data = count->data_length, rx_loop = 0, total_rx = 0;
|
|
struct msghdr msg;
|
|
|
|
if (!conn || !conn->sock || !conn->conn_ops)
|
|
return -1;
|
|
|
|
memset(&msg, 0, sizeof(struct msghdr));
|
|
iov_iter_kvec(&msg.msg_iter, READ | ITER_KVEC,
|
|
count->iov, count->iov_count, data);
|
|
|
|
while (msg_data_left(&msg)) {
|
|
rx_loop = sock_recvmsg(conn->sock, &msg, MSG_WAITALL);
|
|
if (rx_loop <= 0) {
|
|
pr_debug("rx_loop: %d total_rx: %d\n",
|
|
rx_loop, total_rx);
|
|
return rx_loop;
|
|
}
|
|
total_rx += rx_loop;
|
|
pr_debug("rx_loop: %d, total_rx: %d, data: %d\n",
|
|
rx_loop, total_rx, data);
|
|
}
|
|
|
|
return total_rx;
|
|
}
|
|
|
|
int rx_data(
|
|
struct iscsi_conn *conn,
|
|
struct kvec *iov,
|
|
int iov_count,
|
|
int data)
|
|
{
|
|
struct iscsi_data_count c;
|
|
|
|
if (!conn || !conn->sock || !conn->conn_ops)
|
|
return -1;
|
|
|
|
memset(&c, 0, sizeof(struct iscsi_data_count));
|
|
c.iov = iov;
|
|
c.iov_count = iov_count;
|
|
c.data_length = data;
|
|
c.type = ISCSI_RX_DATA;
|
|
|
|
return iscsit_do_rx_data(conn, &c);
|
|
}
|
|
|
|
int tx_data(
|
|
struct iscsi_conn *conn,
|
|
struct kvec *iov,
|
|
int iov_count,
|
|
int data)
|
|
{
|
|
struct msghdr msg;
|
|
int total_tx = 0;
|
|
|
|
if (!conn || !conn->sock || !conn->conn_ops)
|
|
return -1;
|
|
|
|
if (data <= 0) {
|
|
pr_err("Data length is: %d\n", data);
|
|
return -1;
|
|
}
|
|
|
|
memset(&msg, 0, sizeof(struct msghdr));
|
|
|
|
iov_iter_kvec(&msg.msg_iter, WRITE | ITER_KVEC,
|
|
iov, iov_count, data);
|
|
|
|
while (msg_data_left(&msg)) {
|
|
int tx_loop = sock_sendmsg(conn->sock, &msg);
|
|
if (tx_loop <= 0) {
|
|
pr_debug("tx_loop: %d total_tx %d\n",
|
|
tx_loop, total_tx);
|
|
return tx_loop;
|
|
}
|
|
total_tx += tx_loop;
|
|
pr_debug("tx_loop: %d, total_tx: %d, data: %d\n",
|
|
tx_loop, total_tx, data);
|
|
}
|
|
|
|
return total_tx;
|
|
}
|
|
|
|
void iscsit_collect_login_stats(
|
|
struct iscsi_conn *conn,
|
|
u8 status_class,
|
|
u8 status_detail)
|
|
{
|
|
struct iscsi_param *intrname = NULL;
|
|
struct iscsi_tiqn *tiqn;
|
|
struct iscsi_login_stats *ls;
|
|
|
|
tiqn = iscsit_snmp_get_tiqn(conn);
|
|
if (!tiqn)
|
|
return;
|
|
|
|
ls = &tiqn->login_stats;
|
|
|
|
spin_lock(&ls->lock);
|
|
if (status_class == ISCSI_STATUS_CLS_SUCCESS)
|
|
ls->accepts++;
|
|
else if (status_class == ISCSI_STATUS_CLS_REDIRECT) {
|
|
ls->redirects++;
|
|
ls->last_fail_type = ISCSI_LOGIN_FAIL_REDIRECT;
|
|
} else if ((status_class == ISCSI_STATUS_CLS_INITIATOR_ERR) &&
|
|
(status_detail == ISCSI_LOGIN_STATUS_AUTH_FAILED)) {
|
|
ls->authenticate_fails++;
|
|
ls->last_fail_type = ISCSI_LOGIN_FAIL_AUTHENTICATE;
|
|
} else if ((status_class == ISCSI_STATUS_CLS_INITIATOR_ERR) &&
|
|
(status_detail == ISCSI_LOGIN_STATUS_TGT_FORBIDDEN)) {
|
|
ls->authorize_fails++;
|
|
ls->last_fail_type = ISCSI_LOGIN_FAIL_AUTHORIZE;
|
|
} else if ((status_class == ISCSI_STATUS_CLS_INITIATOR_ERR) &&
|
|
(status_detail == ISCSI_LOGIN_STATUS_INIT_ERR)) {
|
|
ls->negotiate_fails++;
|
|
ls->last_fail_type = ISCSI_LOGIN_FAIL_NEGOTIATE;
|
|
} else {
|
|
ls->other_fails++;
|
|
ls->last_fail_type = ISCSI_LOGIN_FAIL_OTHER;
|
|
}
|
|
|
|
/* Save initiator name, ip address and time, if it is a failed login */
|
|
if (status_class != ISCSI_STATUS_CLS_SUCCESS) {
|
|
if (conn->param_list)
|
|
intrname = iscsi_find_param_from_key(INITIATORNAME,
|
|
conn->param_list);
|
|
strlcpy(ls->last_intr_fail_name,
|
|
(intrname ? intrname->value : "Unknown"),
|
|
sizeof(ls->last_intr_fail_name));
|
|
|
|
ls->last_intr_fail_ip_family = conn->login_family;
|
|
|
|
ls->last_intr_fail_sockaddr = conn->login_sockaddr;
|
|
ls->last_fail_time = get_jiffies_64();
|
|
}
|
|
|
|
spin_unlock(&ls->lock);
|
|
}
|
|
|
|
struct iscsi_tiqn *iscsit_snmp_get_tiqn(struct iscsi_conn *conn)
|
|
{
|
|
struct iscsi_portal_group *tpg;
|
|
|
|
if (!conn)
|
|
return NULL;
|
|
|
|
tpg = conn->tpg;
|
|
if (!tpg)
|
|
return NULL;
|
|
|
|
if (!tpg->tpg_tiqn)
|
|
return NULL;
|
|
|
|
return tpg->tpg_tiqn;
|
|
}
|