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1371 lines
34 KiB
1371 lines
34 KiB
// SPDX-License-Identifier: GPL-2.0-or-later |
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/******************************************************************************* |
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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 <[email protected]> |
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* |
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******************************************************************************/ |
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|
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#include <linux/list.h> |
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#include <linux/sched/signal.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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extern struct list_head g_tiqn_list; |
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extern spinlock_t tiqn_lock; |
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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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lockdep_assert_held(&cmd->r2t_lock); |
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WARN_ON_ONCE((s32)xfer_len < 0); |
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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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void iscsit_free_r2t(struct iscsi_r2t *r2t, struct iscsi_cmd *cmd) |
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{ |
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lockdep_assert_held(&cmd->r2t_lock); |
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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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static int iscsit_wait_for_tag(struct se_session *se_sess, int state, int *cpup) |
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{ |
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int tag = -1; |
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DEFINE_SBQ_WAIT(wait); |
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struct sbq_wait_state *ws; |
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struct sbitmap_queue *sbq; |
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if (state == TASK_RUNNING) |
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return tag; |
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sbq = &se_sess->sess_tag_pool; |
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ws = &sbq->ws[0]; |
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for (;;) { |
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sbitmap_prepare_to_wait(sbq, ws, &wait, state); |
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if (signal_pending_state(state, current)) |
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break; |
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tag = sbitmap_queue_get(sbq, cpup); |
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if (tag >= 0) |
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break; |
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schedule(); |
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} |
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sbitmap_finish_wait(sbq, ws, &wait); |
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return tag; |
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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, cpu; |
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tag = sbitmap_queue_get(&se_sess->sess_tag_pool, &cpu); |
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if (tag < 0) |
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tag = iscsit_wait_for_tag(se_sess, state, &cpu); |
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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->se_cmd.map_cpu = cpu; |
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cmd->conn = conn; |
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cmd->data_direction = DMA_NONE; |
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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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timer_setup(&cmd->dataout_timer, iscsit_handle_dataout_timeout, 0); |
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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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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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*/ |
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spin_lock(&sess->cr_i_lock); |
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list_for_each_entry(cr, &sess->cr_inactive_list, cr_list) { |
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spin_lock(&cr->conn_recovery_cmd_lock); |
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list_for_each_entry(cmd, &cr->conn_recovery_cmd_list, i_conn_node) { |
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if (cmd->init_task_tag == init_task_tag) { |
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spin_unlock(&cr->conn_recovery_cmd_lock); |
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spin_unlock(&sess->cr_i_lock); |
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*cr_ptr = cr; |
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*cmd_ptr = cmd; |
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return -2; |
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} |
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} |
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spin_unlock(&cr->conn_recovery_cmd_lock); |
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} |
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spin_unlock(&sess->cr_i_lock); |
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/* |
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* Scan through the active connection recovery list's command list. |
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* If init_task_tag matches the command is ready to be reassigned. |
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*/ |
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spin_lock(&sess->cr_a_lock); |
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list_for_each_entry(cr, &sess->cr_active_list, cr_list) { |
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spin_lock(&cr->conn_recovery_cmd_lock); |
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list_for_each_entry(cmd, &cr->conn_recovery_cmd_list, i_conn_node) { |
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if (cmd->init_task_tag == init_task_tag) { |
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spin_unlock(&cr->conn_recovery_cmd_lock); |
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spin_unlock(&sess->cr_a_lock); |
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*cr_ptr = cr; |
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*cmd_ptr = cmd; |
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return 0; |
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} |
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} |
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spin_unlock(&cr->conn_recovery_cmd_lock); |
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} |
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spin_unlock(&sess->cr_a_lock); |
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return -1; |
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} |
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|
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void iscsit_add_cmd_to_immediate_queue( |
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struct iscsi_cmd *cmd, |
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struct iscsi_conn *conn, |
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u8 state) |
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{ |
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struct iscsi_queue_req *qr; |
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|
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qr = kmem_cache_zalloc(lio_qr_cache, GFP_ATOMIC); |
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if (!qr) { |
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pr_err("Unable to allocate memory for" |
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" struct iscsi_queue_req\n"); |
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return; |
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} |
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INIT_LIST_HEAD(&qr->qr_list); |
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qr->cmd = cmd; |
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qr->state = state; |
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|
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spin_lock_bh(&conn->immed_queue_lock); |
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list_add_tail(&qr->qr_list, &conn->immed_queue_list); |
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atomic_inc(&cmd->immed_queue_count); |
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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)); |
|
} |
|
} |
|
|
|
int 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 -ENOMEM; |
|
} |
|
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); |
|
return 0; |
|
} |
|
|
|
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; |
|
|
|
WARN_ON(!list_empty(&cmd->i_conn_node)); |
|
|
|
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->overflow_buf); |
|
kfree(cmd->iov_data); |
|
kfree(cmd->text_in_ptr); |
|
|
|
target_free_tag(sess->se_sess, se_cmd); |
|
} |
|
EXPORT_SYMBOL(iscsit_release_cmd); |
|
|
|
void __iscsit_free_cmd(struct iscsi_cmd *cmd, bool check_queues) |
|
{ |
|
struct iscsi_conn *conn = cmd->conn; |
|
|
|
WARN_ON(!list_empty(&cmd->i_conn_node)); |
|
|
|
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_unmap_cmd) |
|
conn->conn_transport->iscsit_unmap_cmd(conn, cmd); |
|
} |
|
|
|
void iscsit_free_cmd(struct iscsi_cmd *cmd, bool shutdown) |
|
{ |
|
struct se_cmd *se_cmd = cmd->se_cmd.se_tfo ? &cmd->se_cmd : NULL; |
|
int rc; |
|
|
|
WARN_ON(!list_empty(&cmd->i_conn_node)); |
|
|
|
__iscsit_free_cmd(cmd, shutdown); |
|
if (se_cmd) { |
|
rc = transport_generic_free_cmd(se_cmd, shutdown); |
|
if (!rc && shutdown && se_cmd->se_sess) { |
|
__iscsit_free_cmd(cmd, shutdown); |
|
target_put_sess_cmd(se_cmd); |
|
} |
|
} else { |
|
iscsit_release_cmd(cmd); |
|
} |
|
} |
|
EXPORT_SYMBOL(iscsit_free_cmd); |
|
|
|
bool iscsit_check_session_usage_count(struct iscsi_session *sess, |
|
bool can_sleep) |
|
{ |
|
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 (!can_sleep) |
|
return true; |
|
|
|
wait_for_completion(&sess->session_waiting_on_uc_comp); |
|
return false; |
|
} |
|
spin_unlock_bh(&sess->session_usage_lock); |
|
|
|
return false; |
|
} |
|
|
|
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; |
|
} |
|
|
|
void iscsit_handle_nopin_response_timeout(struct timer_list *t) |
|
{ |
|
struct iscsi_conn *conn = from_timer(conn, t, nopin_response_timer); |
|
struct iscsi_session *sess = conn->sess; |
|
|
|
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_err("Did not receive response to NOPIN on CID: %hu, failing" |
|
" connection for I_T Nexus %s,i,0x%6phN,%s,t,0x%02x\n", |
|
conn->cid, sess->sess_ops->InitiatorName, sess->isid, |
|
sess->tpg->tpg_tiqn->tiqn, (u32)sess->tpg->tpgt); |
|
conn->nopin_response_timer_flags &= ~ISCSI_TF_RUNNING; |
|
spin_unlock_bh(&conn->nopin_timer_lock); |
|
|
|
iscsit_fill_cxn_timeout_err_stats(sess); |
|
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); |
|
} |
|
|
|
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; |
|
} |
|
|
|
conn->nopin_response_timer_flags &= ~ISCSI_TF_STOP; |
|
conn->nopin_response_timer_flags |= ISCSI_TF_RUNNING; |
|
mod_timer(&conn->nopin_response_timer, |
|
jiffies + na->nopin_response_timeout * HZ); |
|
|
|
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); |
|
} |
|
|
|
void iscsit_handle_nopin_timeout(struct timer_list *t) |
|
{ |
|
struct iscsi_conn *conn = from_timer(conn, t, nopin_timer); |
|
|
|
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); |
|
} |
|
|
|
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); |
|
|
|
lockdep_assert_held(&conn->nopin_timer_lock); |
|
|
|
/* |
|
* NOPIN timeout is disabled. |
|
*/ |
|
if (!na->nopin_timeout) |
|
return; |
|
|
|
if (conn->nopin_timer_flags & ISCSI_TF_RUNNING) |
|
return; |
|
|
|
conn->nopin_timer_flags &= ~ISCSI_TF_STOP; |
|
conn->nopin_timer_flags |= ISCSI_TF_RUNNING; |
|
mod_timer(&conn->nopin_timer, jiffies + na->nopin_timeout * HZ); |
|
|
|
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) |
|
{ |
|
spin_lock_bh(&conn->nopin_timer_lock); |
|
__iscsit_start_nopin_timer(conn); |
|
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); |
|
} |
|
|
|
int rx_data( |
|
struct iscsi_conn *conn, |
|
struct kvec *iov, |
|
int iov_count, |
|
int data) |
|
{ |
|
int 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, iov, 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 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, 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; |
|
} |
|
|
|
void iscsit_fill_cxn_timeout_err_stats(struct iscsi_session *sess) |
|
{ |
|
struct iscsi_portal_group *tpg = sess->tpg; |
|
struct iscsi_tiqn *tiqn = tpg->tpg_tiqn; |
|
|
|
if (!tiqn) |
|
return; |
|
|
|
spin_lock_bh(&tiqn->sess_err_stats.lock); |
|
strlcpy(tiqn->sess_err_stats.last_sess_fail_rem_name, |
|
sess->sess_ops->InitiatorName, |
|
sizeof(tiqn->sess_err_stats.last_sess_fail_rem_name)); |
|
tiqn->sess_err_stats.last_sess_failure_type = |
|
ISCSI_SESS_ERR_CXN_TIMEOUT; |
|
tiqn->sess_err_stats.cxn_timeout_errors++; |
|
atomic_long_inc(&sess->conn_timeout_errors); |
|
spin_unlock_bh(&tiqn->sess_err_stats.lock); |
|
}
|
|
|