520 lines
14 KiB
C
520 lines
14 KiB
C
|
// SPDX-License-Identifier: GPL-2.0-or-later
|
||
|
|
/*******************************************************************************
|
||
|
|
* This file contains the iSCSI Target DataIN value generation functions.
|
||
|
|
*
|
||
|
|
* (c) Copyright 2007-2013 Datera, Inc.
|
||
|
|
*
|
||
|
|
* Author: Nicholas A. Bellinger <nab@linux-iscsi.org>
|
||
|
|
*
|
||
|
|
******************************************************************************/
|
||
|
|
|
||
|
|
#include <linux/slab.h>
|
||
|
|
#include <scsi/iscsi_proto.h>
|
||
|
|
#include <target/iscsi/iscsi_target_core.h>
|
||
|
|
#include "iscsi_target_seq_pdu_list.h"
|
||
|
|
#include "iscsi_target_erl1.h"
|
||
|
|
#include "iscsi_target_util.h"
|
||
|
|
#include "iscsi_target.h"
|
||
|
|
#include "iscsi_target_datain_values.h"
|
||
|
|
|
||
|
|
struct iscsi_datain_req *iscsit_allocate_datain_req(void)
|
||
|
|
{
|
||
|
|
struct iscsi_datain_req *dr;
|
||
|
|
|
||
|
|
dr = kmem_cache_zalloc(lio_dr_cache, GFP_ATOMIC);
|
||
|
|
if (!dr) {
|
||
|
|
pr_err("Unable to allocate memory for"
|
||
|
|
" struct iscsi_datain_req\n");
|
||
|
|
return NULL;
|
||
|
|
}
|
||
|
|
INIT_LIST_HEAD(&dr->cmd_datain_node);
|
||
|
|
|
||
|
|
return dr;
|
||
|
|
}
|
||
|
|
|
||
|
|
void iscsit_attach_datain_req(struct iscsi_cmd *cmd, struct iscsi_datain_req *dr)
|
||
|
|
{
|
||
|
|
spin_lock(&cmd->datain_lock);
|
||
|
|
list_add_tail(&dr->cmd_datain_node, &cmd->datain_list);
|
||
|
|
spin_unlock(&cmd->datain_lock);
|
||
|
|
}
|
||
|
|
|
||
|
|
void iscsit_free_datain_req(struct iscsi_cmd *cmd, struct iscsi_datain_req *dr)
|
||
|
|
{
|
||
|
|
spin_lock(&cmd->datain_lock);
|
||
|
|
list_del(&dr->cmd_datain_node);
|
||
|
|
spin_unlock(&cmd->datain_lock);
|
||
|
|
|
||
|
|
kmem_cache_free(lio_dr_cache, dr);
|
||
|
|
}
|
||
|
|
|
||
|
|
void iscsit_free_all_datain_reqs(struct iscsi_cmd *cmd)
|
||
|
|
{
|
||
|
|
struct iscsi_datain_req *dr, *dr_tmp;
|
||
|
|
|
||
|
|
spin_lock(&cmd->datain_lock);
|
||
|
|
list_for_each_entry_safe(dr, dr_tmp, &cmd->datain_list, cmd_datain_node) {
|
||
|
|
list_del(&dr->cmd_datain_node);
|
||
|
|
kmem_cache_free(lio_dr_cache, dr);
|
||
|
|
}
|
||
|
|
spin_unlock(&cmd->datain_lock);
|
||
|
|
}
|
||
|
|
|
||
|
|
struct iscsi_datain_req *iscsit_get_datain_req(struct iscsi_cmd *cmd)
|
||
|
|
{
|
||
|
|
if (list_empty(&cmd->datain_list)) {
|
||
|
|
pr_err("cmd->datain_list is empty for ITT:"
|
||
|
|
" 0x%08x\n", cmd->init_task_tag);
|
||
|
|
return NULL;
|
||
|
|
}
|
||
|
|
|
||
|
|
return list_first_entry(&cmd->datain_list, struct iscsi_datain_req,
|
||
|
|
cmd_datain_node);
|
||
|
|
}
|
||
|
|
|
||
|
|
/*
|
||
|
|
* For Normal and Recovery DataSequenceInOrder=Yes and DataPDUInOrder=Yes.
|
||
|
|
*/
|
||
|
|
static struct iscsi_datain_req *iscsit_set_datain_values_yes_and_yes(
|
||
|
|
struct iscsi_cmd *cmd,
|
||
|
|
struct iscsi_datain *datain)
|
||
|
|
{
|
||
|
|
u32 next_burst_len, read_data_done, read_data_left;
|
||
|
|
struct iscsi_conn *conn = cmd->conn;
|
||
|
|
struct iscsi_datain_req *dr;
|
||
|
|
|
||
|
|
dr = iscsit_get_datain_req(cmd);
|
||
|
|
if (!dr)
|
||
|
|
return NULL;
|
||
|
|
|
||
|
|
if (dr->recovery && dr->generate_recovery_values) {
|
||
|
|
if (iscsit_create_recovery_datain_values_datasequenceinorder_yes(
|
||
|
|
cmd, dr) < 0)
|
||
|
|
return NULL;
|
||
|
|
|
||
|
|
dr->generate_recovery_values = 0;
|
||
|
|
}
|
||
|
|
|
||
|
|
next_burst_len = (!dr->recovery) ?
|
||
|
|
cmd->next_burst_len : dr->next_burst_len;
|
||
|
|
read_data_done = (!dr->recovery) ?
|
||
|
|
cmd->read_data_done : dr->read_data_done;
|
||
|
|
|
||
|
|
read_data_left = (cmd->se_cmd.data_length - read_data_done);
|
||
|
|
if (!read_data_left) {
|
||
|
|
pr_err("ITT: 0x%08x read_data_left is zero!\n",
|
||
|
|
cmd->init_task_tag);
|
||
|
|
return NULL;
|
||
|
|
}
|
||
|
|
|
||
|
|
if ((read_data_left <= conn->conn_ops->MaxRecvDataSegmentLength) &&
|
||
|
|
(read_data_left <= (conn->sess->sess_ops->MaxBurstLength -
|
||
|
|
next_burst_len))) {
|
||
|
|
datain->length = read_data_left;
|
||
|
|
|
||
|
|
datain->flags |= (ISCSI_FLAG_CMD_FINAL | ISCSI_FLAG_DATA_STATUS);
|
||
|
|
if (conn->sess->sess_ops->ErrorRecoveryLevel > 0)
|
||
|
|
datain->flags |= ISCSI_FLAG_DATA_ACK;
|
||
|
|
} else {
|
||
|
|
if ((next_burst_len +
|
||
|
|
conn->conn_ops->MaxRecvDataSegmentLength) <
|
||
|
|
conn->sess->sess_ops->MaxBurstLength) {
|
||
|
|
datain->length =
|
||
|
|
conn->conn_ops->MaxRecvDataSegmentLength;
|
||
|
|
next_burst_len += datain->length;
|
||
|
|
} else {
|
||
|
|
datain->length = (conn->sess->sess_ops->MaxBurstLength -
|
||
|
|
next_burst_len);
|
||
|
|
next_burst_len = 0;
|
||
|
|
|
||
|
|
datain->flags |= ISCSI_FLAG_CMD_FINAL;
|
||
|
|
if (conn->sess->sess_ops->ErrorRecoveryLevel > 0)
|
||
|
|
datain->flags |= ISCSI_FLAG_DATA_ACK;
|
||
|
|
}
|
||
|
|
}
|
||
|
|
|
||
|
|
datain->data_sn = (!dr->recovery) ? cmd->data_sn++ : dr->data_sn++;
|
||
|
|
datain->offset = read_data_done;
|
||
|
|
|
||
|
|
if (!dr->recovery) {
|
||
|
|
cmd->next_burst_len = next_burst_len;
|
||
|
|
cmd->read_data_done += datain->length;
|
||
|
|
} else {
|
||
|
|
dr->next_burst_len = next_burst_len;
|
||
|
|
dr->read_data_done += datain->length;
|
||
|
|
}
|
||
|
|
|
||
|
|
if (!dr->recovery) {
|
||
|
|
if (datain->flags & ISCSI_FLAG_DATA_STATUS)
|
||
|
|
dr->dr_complete = DATAIN_COMPLETE_NORMAL;
|
||
|
|
|
||
|
|
return dr;
|
||
|
|
}
|
||
|
|
|
||
|
|
if (!dr->runlength) {
|
||
|
|
if (datain->flags & ISCSI_FLAG_DATA_STATUS) {
|
||
|
|
dr->dr_complete =
|
||
|
|
(dr->recovery == DATAIN_WITHIN_COMMAND_RECOVERY) ?
|
||
|
|
DATAIN_COMPLETE_WITHIN_COMMAND_RECOVERY :
|
||
|
|
DATAIN_COMPLETE_CONNECTION_RECOVERY;
|
||
|
|
}
|
||
|
|
} else {
|
||
|
|
if ((dr->begrun + dr->runlength) == dr->data_sn) {
|
||
|
|
dr->dr_complete =
|
||
|
|
(dr->recovery == DATAIN_WITHIN_COMMAND_RECOVERY) ?
|
||
|
|
DATAIN_COMPLETE_WITHIN_COMMAND_RECOVERY :
|
||
|
|
DATAIN_COMPLETE_CONNECTION_RECOVERY;
|
||
|
|
}
|
||
|
|
}
|
||
|
|
|
||
|
|
return dr;
|
||
|
|
}
|
||
|
|
|
||
|
|
/*
|
||
|
|
* For Normal and Recovery DataSequenceInOrder=No and DataPDUInOrder=Yes.
|
||
|
|
*/
|
||
|
|
static struct iscsi_datain_req *iscsit_set_datain_values_no_and_yes(
|
||
|
|
struct iscsi_cmd *cmd,
|
||
|
|
struct iscsi_datain *datain)
|
||
|
|
{
|
||
|
|
u32 offset, read_data_done, read_data_left, seq_send_order;
|
||
|
|
struct iscsi_conn *conn = cmd->conn;
|
||
|
|
struct iscsi_datain_req *dr;
|
||
|
|
struct iscsi_seq *seq;
|
||
|
|
|
||
|
|
dr = iscsit_get_datain_req(cmd);
|
||
|
|
if (!dr)
|
||
|
|
return NULL;
|
||
|
|
|
||
|
|
if (dr->recovery && dr->generate_recovery_values) {
|
||
|
|
if (iscsit_create_recovery_datain_values_datasequenceinorder_no(
|
||
|
|
cmd, dr) < 0)
|
||
|
|
return NULL;
|
||
|
|
|
||
|
|
dr->generate_recovery_values = 0;
|
||
|
|
}
|
||
|
|
|
||
|
|
read_data_done = (!dr->recovery) ?
|
||
|
|
cmd->read_data_done : dr->read_data_done;
|
||
|
|
seq_send_order = (!dr->recovery) ?
|
||
|
|
cmd->seq_send_order : dr->seq_send_order;
|
||
|
|
|
||
|
|
read_data_left = (cmd->se_cmd.data_length - read_data_done);
|
||
|
|
if (!read_data_left) {
|
||
|
|
pr_err("ITT: 0x%08x read_data_left is zero!\n",
|
||
|
|
cmd->init_task_tag);
|
||
|
|
return NULL;
|
||
|
|
}
|
||
|
|
|
||
|
|
seq = iscsit_get_seq_holder_for_datain(cmd, seq_send_order);
|
||
|
|
if (!seq)
|
||
|
|
return NULL;
|
||
|
|
|
||
|
|
seq->sent = 1;
|
||
|
|
|
||
|
|
if (!dr->recovery && !seq->next_burst_len)
|
||
|
|
seq->first_datasn = cmd->data_sn;
|
||
|
|
|
||
|
|
offset = (seq->offset + seq->next_burst_len);
|
||
|
|
|
||
|
|
if ((offset + conn->conn_ops->MaxRecvDataSegmentLength) >=
|
||
|
|
cmd->se_cmd.data_length) {
|
||
|
|
datain->length = (cmd->se_cmd.data_length - offset);
|
||
|
|
datain->offset = offset;
|
||
|
|
|
||
|
|
datain->flags |= ISCSI_FLAG_CMD_FINAL;
|
||
|
|
if (conn->sess->sess_ops->ErrorRecoveryLevel > 0)
|
||
|
|
datain->flags |= ISCSI_FLAG_DATA_ACK;
|
||
|
|
|
||
|
|
seq->next_burst_len = 0;
|
||
|
|
seq_send_order++;
|
||
|
|
} else {
|
||
|
|
if ((seq->next_burst_len +
|
||
|
|
conn->conn_ops->MaxRecvDataSegmentLength) <
|
||
|
|
conn->sess->sess_ops->MaxBurstLength) {
|
||
|
|
datain->length =
|
||
|
|
conn->conn_ops->MaxRecvDataSegmentLength;
|
||
|
|
datain->offset = (seq->offset + seq->next_burst_len);
|
||
|
|
|
||
|
|
seq->next_burst_len += datain->length;
|
||
|
|
} else {
|
||
|
|
datain->length = (conn->sess->sess_ops->MaxBurstLength -
|
||
|
|
seq->next_burst_len);
|
||
|
|
datain->offset = (seq->offset + seq->next_burst_len);
|
||
|
|
|
||
|
|
datain->flags |= ISCSI_FLAG_CMD_FINAL;
|
||
|
|
if (conn->sess->sess_ops->ErrorRecoveryLevel > 0)
|
||
|
|
datain->flags |= ISCSI_FLAG_DATA_ACK;
|
||
|
|
|
||
|
|
seq->next_burst_len = 0;
|
||
|
|
seq_send_order++;
|
||
|
|
}
|
||
|
|
}
|
||
|
|
|
||
|
|
if ((read_data_done + datain->length) == cmd->se_cmd.data_length)
|
||
|
|
datain->flags |= ISCSI_FLAG_DATA_STATUS;
|
||
|
|
|
||
|
|
datain->data_sn = (!dr->recovery) ? cmd->data_sn++ : dr->data_sn++;
|
||
|
|
if (!dr->recovery) {
|
||
|
|
cmd->seq_send_order = seq_send_order;
|
||
|
|
cmd->read_data_done += datain->length;
|
||
|
|
} else {
|
||
|
|
dr->seq_send_order = seq_send_order;
|
||
|
|
dr->read_data_done += datain->length;
|
||
|
|
}
|
||
|
|
|
||
|
|
if (!dr->recovery) {
|
||
|
|
if (datain->flags & ISCSI_FLAG_CMD_FINAL)
|
||
|
|
seq->last_datasn = datain->data_sn;
|
||
|
|
if (datain->flags & ISCSI_FLAG_DATA_STATUS)
|
||
|
|
dr->dr_complete = DATAIN_COMPLETE_NORMAL;
|
||
|
|
|
||
|
|
return dr;
|
||
|
|
}
|
||
|
|
|
||
|
|
if (!dr->runlength) {
|
||
|
|
if (datain->flags & ISCSI_FLAG_DATA_STATUS) {
|
||
|
|
dr->dr_complete =
|
||
|
|
(dr->recovery == DATAIN_WITHIN_COMMAND_RECOVERY) ?
|
||
|
|
DATAIN_COMPLETE_WITHIN_COMMAND_RECOVERY :
|
||
|
|
DATAIN_COMPLETE_CONNECTION_RECOVERY;
|
||
|
|
}
|
||
|
|
} else {
|
||
|
|
if ((dr->begrun + dr->runlength) == dr->data_sn) {
|
||
|
|
dr->dr_complete =
|
||
|
|
(dr->recovery == DATAIN_WITHIN_COMMAND_RECOVERY) ?
|
||
|
|
DATAIN_COMPLETE_WITHIN_COMMAND_RECOVERY :
|
||
|
|
DATAIN_COMPLETE_CONNECTION_RECOVERY;
|
||
|
|
}
|
||
|
|
}
|
||
|
|
|
||
|
|
return dr;
|
||
|
|
}
|
||
|
|
|
||
|
|
/*
|
||
|
|
* For Normal and Recovery DataSequenceInOrder=Yes and DataPDUInOrder=No.
|
||
|
|
*/
|
||
|
|
static struct iscsi_datain_req *iscsit_set_datain_values_yes_and_no(
|
||
|
|
struct iscsi_cmd *cmd,
|
||
|
|
struct iscsi_datain *datain)
|
||
|
|
{
|
||
|
|
u32 next_burst_len, read_data_done, read_data_left;
|
||
|
|
struct iscsi_conn *conn = cmd->conn;
|
||
|
|
struct iscsi_datain_req *dr;
|
||
|
|
struct iscsi_pdu *pdu;
|
||
|
|
|
||
|
|
dr = iscsit_get_datain_req(cmd);
|
||
|
|
if (!dr)
|
||
|
|
return NULL;
|
||
|
|
|
||
|
|
if (dr->recovery && dr->generate_recovery_values) {
|
||
|
|
if (iscsit_create_recovery_datain_values_datasequenceinorder_yes(
|
||
|
|
cmd, dr) < 0)
|
||
|
|
return NULL;
|
||
|
|
|
||
|
|
dr->generate_recovery_values = 0;
|
||
|
|
}
|
||
|
|
|
||
|
|
next_burst_len = (!dr->recovery) ?
|
||
|
|
cmd->next_burst_len : dr->next_burst_len;
|
||
|
|
read_data_done = (!dr->recovery) ?
|
||
|
|
cmd->read_data_done : dr->read_data_done;
|
||
|
|
|
||
|
|
read_data_left = (cmd->se_cmd.data_length - read_data_done);
|
||
|
|
if (!read_data_left) {
|
||
|
|
pr_err("ITT: 0x%08x read_data_left is zero!\n",
|
||
|
|
cmd->init_task_tag);
|
||
|
|
return dr;
|
||
|
|
}
|
||
|
|
|
||
|
|
pdu = iscsit_get_pdu_holder_for_seq(cmd, NULL);
|
||
|
|
if (!pdu)
|
||
|
|
return dr;
|
||
|
|
|
||
|
|
if ((read_data_done + pdu->length) == cmd->se_cmd.data_length) {
|
||
|
|
pdu->flags |= (ISCSI_FLAG_CMD_FINAL | ISCSI_FLAG_DATA_STATUS);
|
||
|
|
if (conn->sess->sess_ops->ErrorRecoveryLevel > 0)
|
||
|
|
pdu->flags |= ISCSI_FLAG_DATA_ACK;
|
||
|
|
|
||
|
|
next_burst_len = 0;
|
||
|
|
} else {
|
||
|
|
if ((next_burst_len + conn->conn_ops->MaxRecvDataSegmentLength) <
|
||
|
|
conn->sess->sess_ops->MaxBurstLength)
|
||
|
|
next_burst_len += pdu->length;
|
||
|
|
else {
|
||
|
|
pdu->flags |= ISCSI_FLAG_CMD_FINAL;
|
||
|
|
if (conn->sess->sess_ops->ErrorRecoveryLevel > 0)
|
||
|
|
pdu->flags |= ISCSI_FLAG_DATA_ACK;
|
||
|
|
|
||
|
|
next_burst_len = 0;
|
||
|
|
}
|
||
|
|
}
|
||
|
|
|
||
|
|
pdu->data_sn = (!dr->recovery) ? cmd->data_sn++ : dr->data_sn++;
|
||
|
|
if (!dr->recovery) {
|
||
|
|
cmd->next_burst_len = next_burst_len;
|
||
|
|
cmd->read_data_done += pdu->length;
|
||
|
|
} else {
|
||
|
|
dr->next_burst_len = next_burst_len;
|
||
|
|
dr->read_data_done += pdu->length;
|
||
|
|
}
|
||
|
|
|
||
|
|
datain->flags = pdu->flags;
|
||
|
|
datain->length = pdu->length;
|
||
|
|
datain->offset = pdu->offset;
|
||
|
|
datain->data_sn = pdu->data_sn;
|
||
|
|
|
||
|
|
if (!dr->recovery) {
|
||
|
|
if (datain->flags & ISCSI_FLAG_DATA_STATUS)
|
||
|
|
dr->dr_complete = DATAIN_COMPLETE_NORMAL;
|
||
|
|
|
||
|
|
return dr;
|
||
|
|
}
|
||
|
|
|
||
|
|
if (!dr->runlength) {
|
||
|
|
if (datain->flags & ISCSI_FLAG_DATA_STATUS) {
|
||
|
|
dr->dr_complete =
|
||
|
|
(dr->recovery == DATAIN_WITHIN_COMMAND_RECOVERY) ?
|
||
|
|
DATAIN_COMPLETE_WITHIN_COMMAND_RECOVERY :
|
||
|
|
DATAIN_COMPLETE_CONNECTION_RECOVERY;
|
||
|
|
}
|
||
|
|
} else {
|
||
|
|
if ((dr->begrun + dr->runlength) == dr->data_sn) {
|
||
|
|
dr->dr_complete =
|
||
|
|
(dr->recovery == DATAIN_WITHIN_COMMAND_RECOVERY) ?
|
||
|
|
DATAIN_COMPLETE_WITHIN_COMMAND_RECOVERY :
|
||
|
|
DATAIN_COMPLETE_CONNECTION_RECOVERY;
|
||
|
|
}
|
||
|
|
}
|
||
|
|
|
||
|
|
return dr;
|
||
|
|
}
|
||
|
|
|
||
|
|
/*
|
||
|
|
* For Normal and Recovery DataSequenceInOrder=No and DataPDUInOrder=No.
|
||
|
|
*/
|
||
|
|
static struct iscsi_datain_req *iscsit_set_datain_values_no_and_no(
|
||
|
|
struct iscsi_cmd *cmd,
|
||
|
|
struct iscsi_datain *datain)
|
||
|
|
{
|
||
|
|
u32 read_data_done, read_data_left, seq_send_order;
|
||
|
|
struct iscsi_conn *conn = cmd->conn;
|
||
|
|
struct iscsi_datain_req *dr;
|
||
|
|
struct iscsi_pdu *pdu;
|
||
|
|
struct iscsi_seq *seq = NULL;
|
||
|
|
|
||
|
|
dr = iscsit_get_datain_req(cmd);
|
||
|
|
if (!dr)
|
||
|
|
return NULL;
|
||
|
|
|
||
|
|
if (dr->recovery && dr->generate_recovery_values) {
|
||
|
|
if (iscsit_create_recovery_datain_values_datasequenceinorder_no(
|
||
|
|
cmd, dr) < 0)
|
||
|
|
return NULL;
|
||
|
|
|
||
|
|
dr->generate_recovery_values = 0;
|
||
|
|
}
|
||
|
|
|
||
|
|
read_data_done = (!dr->recovery) ?
|
||
|
|
cmd->read_data_done : dr->read_data_done;
|
||
|
|
seq_send_order = (!dr->recovery) ?
|
||
|
|
cmd->seq_send_order : dr->seq_send_order;
|
||
|
|
|
||
|
|
read_data_left = (cmd->se_cmd.data_length - read_data_done);
|
||
|
|
if (!read_data_left) {
|
||
|
|
pr_err("ITT: 0x%08x read_data_left is zero!\n",
|
||
|
|
cmd->init_task_tag);
|
||
|
|
return NULL;
|
||
|
|
}
|
||
|
|
|
||
|
|
seq = iscsit_get_seq_holder_for_datain(cmd, seq_send_order);
|
||
|
|
if (!seq)
|
||
|
|
return NULL;
|
||
|
|
|
||
|
|
seq->sent = 1;
|
||
|
|
|
||
|
|
if (!dr->recovery && !seq->next_burst_len)
|
||
|
|
seq->first_datasn = cmd->data_sn;
|
||
|
|
|
||
|
|
pdu = iscsit_get_pdu_holder_for_seq(cmd, seq);
|
||
|
|
if (!pdu)
|
||
|
|
return NULL;
|
||
|
|
|
||
|
|
if (seq->pdu_send_order == seq->pdu_count) {
|
||
|
|
pdu->flags |= ISCSI_FLAG_CMD_FINAL;
|
||
|
|
if (conn->sess->sess_ops->ErrorRecoveryLevel > 0)
|
||
|
|
pdu->flags |= ISCSI_FLAG_DATA_ACK;
|
||
|
|
|
||
|
|
seq->next_burst_len = 0;
|
||
|
|
seq_send_order++;
|
||
|
|
} else
|
||
|
|
seq->next_burst_len += pdu->length;
|
||
|
|
|
||
|
|
if ((read_data_done + pdu->length) == cmd->se_cmd.data_length)
|
||
|
|
pdu->flags |= ISCSI_FLAG_DATA_STATUS;
|
||
|
|
|
||
|
|
pdu->data_sn = (!dr->recovery) ? cmd->data_sn++ : dr->data_sn++;
|
||
|
|
if (!dr->recovery) {
|
||
|
|
cmd->seq_send_order = seq_send_order;
|
||
|
|
cmd->read_data_done += pdu->length;
|
||
|
|
} else {
|
||
|
|
dr->seq_send_order = seq_send_order;
|
||
|
|
dr->read_data_done += pdu->length;
|
||
|
|
}
|
||
|
|
|
||
|
|
datain->flags = pdu->flags;
|
||
|
|
datain->length = pdu->length;
|
||
|
|
datain->offset = pdu->offset;
|
||
|
|
datain->data_sn = pdu->data_sn;
|
||
|
|
|
||
|
|
if (!dr->recovery) {
|
||
|
|
if (datain->flags & ISCSI_FLAG_CMD_FINAL)
|
||
|
|
seq->last_datasn = datain->data_sn;
|
||
|
|
if (datain->flags & ISCSI_FLAG_DATA_STATUS)
|
||
|
|
dr->dr_complete = DATAIN_COMPLETE_NORMAL;
|
||
|
|
|
||
|
|
return dr;
|
||
|
|
}
|
||
|
|
|
||
|
|
if (!dr->runlength) {
|
||
|
|
if (datain->flags & ISCSI_FLAG_DATA_STATUS) {
|
||
|
|
dr->dr_complete =
|
||
|
|
(dr->recovery == DATAIN_WITHIN_COMMAND_RECOVERY) ?
|
||
|
|
DATAIN_COMPLETE_WITHIN_COMMAND_RECOVERY :
|
||
|
|
DATAIN_COMPLETE_CONNECTION_RECOVERY;
|
||
|
|
}
|
||
|
|
} else {
|
||
|
|
if ((dr->begrun + dr->runlength) == dr->data_sn) {
|
||
|
|
dr->dr_complete =
|
||
|
|
(dr->recovery == DATAIN_WITHIN_COMMAND_RECOVERY) ?
|
||
|
|
DATAIN_COMPLETE_WITHIN_COMMAND_RECOVERY :
|
||
|
|
DATAIN_COMPLETE_CONNECTION_RECOVERY;
|
||
|
|
}
|
||
|
|
}
|
||
|
|
|
||
|
|
return dr;
|
||
|
|
}
|
||
|
|
|
||
|
|
struct iscsi_datain_req *iscsit_get_datain_values(
|
||
|
|
struct iscsi_cmd *cmd,
|
||
|
|
struct iscsi_datain *datain)
|
||
|
|
{
|
||
|
|
struct iscsi_conn *conn = cmd->conn;
|
||
|
|
|
||
|
|
if (conn->sess->sess_ops->DataSequenceInOrder &&
|
||
|
|
conn->sess->sess_ops->DataPDUInOrder)
|
||
|
|
return iscsit_set_datain_values_yes_and_yes(cmd, datain);
|
||
|
|
else if (!conn->sess->sess_ops->DataSequenceInOrder &&
|
||
|
|
conn->sess->sess_ops->DataPDUInOrder)
|
||
|
|
return iscsit_set_datain_values_no_and_yes(cmd, datain);
|
||
|
|
else if (conn->sess->sess_ops->DataSequenceInOrder &&
|
||
|
|
!conn->sess->sess_ops->DataPDUInOrder)
|
||
|
|
return iscsit_set_datain_values_yes_and_no(cmd, datain);
|
||
|
|
else if (!conn->sess->sess_ops->DataSequenceInOrder &&
|
||
|
|
!conn->sess->sess_ops->DataPDUInOrder)
|
||
|
|
return iscsit_set_datain_values_no_and_no(cmd, datain);
|
||
|
|
|
||
|
|
return NULL;
|
||
|
|
}
|
||
|
|
EXPORT_SYMBOL(iscsit_get_datain_values);
|