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Merge git://git.kernel.org/pub/scm/linux/kernel/git/nab/target-pending

Browse Source 
Pull scsi target fixes from Nicholas Bellinger:
 "The highlights include:

   - Re-instate sess->wait_list in target_wait_for_sess_cmds() for
     active I/O shutdown handling in fabrics using se_cmd->cmd_kref
   - Make ib_srpt call target_sess_cmd_list_set_waiting() during session
     shutdown
   - Fix FILEIO off-by-one READ_CAPACITY bug for !S_ISBLK export
   - Fix iscsi-target login error heap buffer overflow (Kees)
   - Fix iscsi-target active I/O shutdown handling regression in
     v3.10-rc1

  A big thanks to Kees Cook for fixing a long standing login error
  buffer overflow bug.

  All patches are CC'ed to stable with the exception of the v3.10-rc1
  specific regression + other minor target cleanup."

* git://git.kernel.org/pub/scm/linux/kernel/git/nab/target-pending:
  iscsi-target: Fix iscsit_free_cmd() se_cmd->cmd_kref shutdown handling
  target: Propigate up ->cmd_kref put return via transport_generic_free_cmd
  iscsi-target: fix heap buffer overflow on error
  target/file: Fix off-by-one READ_CAPACITY bug for !S_ISBLK export
  ib_srpt: Call target_sess_cmd_list_set_waiting during shutdown_session
  target: Re-instate sess_wait_list for target_wait_for_sess_cmds
  target: Remove unused wait_for_tasks bit in target_wait_for_sess_cmds
This commit is contained in:
Linus Torvalds 2013-06-01 20:05:20 +09:00
commit 008bd2de94
13 changed files with 128 additions and 91 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

34
drivers/infiniband/ulp/srpt/ib_srpt.c
View File

@ -2226,6 +2226,27 @@ static void srpt_close_ch(struct srpt_rdma_ch *ch)
spin_unlock_irq(&sdev->spinlock);
}
/**
* srpt_shutdown_session() - Whether or not a session may be shut down.
*/
static int srpt_shutdown_session(struct se_session *se_sess)
{
struct srpt_rdma_ch *ch = se_sess->fabric_sess_ptr;
unsigned long flags;
spin_lock_irqsave(&ch->spinlock, flags);
if (ch->in_shutdown) {
spin_unlock_irqrestore(&ch->spinlock, flags);
return true;
}
ch->in_shutdown = true;
target_sess_cmd_list_set_waiting(se_sess);
spin_unlock_irqrestore(&ch->spinlock, flags);
return true;
}
/**
* srpt_drain_channel() - Drain a channel by resetting the IB queue pair.
* @cm_id: Pointer to the CM ID of the channel to be drained.
@ -2264,6 +2285,9 @@ static void srpt_drain_channel(struct ib_cm_id *cm_id)
spin_unlock_irq(&sdev->spinlock);
if (do_reset) {
if (ch->sess)
srpt_shutdown_session(ch->sess);
ret = srpt_ch_qp_err(ch);
if (ret < 0)
printk(KERN_ERR "Setting queue pair in error state"
@ -2328,7 +2352,7 @@ static void srpt_release_channel_work(struct work_struct *w)
se_sess = ch->sess;
BUG_ON(!se_sess);
target_wait_for_sess_cmds(se_sess, 0);
target_wait_for_sess_cmds(se_sess);
transport_deregister_session_configfs(se_sess);
transport_deregister_session(se_sess);
@ -3466,14 +3490,6 @@ static void srpt_release_cmd(struct se_cmd *se_cmd)
spin_unlock_irqrestore(&ch->spinlock, flags);
}
/**
* srpt_shutdown_session() - Whether or not a session may be shut down.
*/
static int srpt_shutdown_session(struct se_session *se_sess)
{
return true;
}
/**
* srpt_close_session() - Forcibly close a session.
*

1
drivers/infiniband/ulp/srpt/ib_srpt.h
View File

@ -325,6 +325,7 @@ struct srpt_rdma_ch {
u8 sess_name[36];
struct work_struct release_work;
struct completion *release_done;
bool in_shutdown;
};
/**

2
drivers/scsi/qla2xxx/tcm_qla2xxx.c
View File

@ -1370,7 +1370,7 @@ static void tcm_qla2xxx_free_session(struct qla_tgt_sess *sess)
dump_stack();
return;
}
target_wait_for_sess_cmds(se_sess, 0);
target_wait_for_sess_cmds(se_sess);
transport_deregister_session_configfs(sess->se_sess);
transport_deregister_session(sess->se_sess);

12
drivers/target/iscsi/iscsi_target.c
View File

@ -651,7 +651,7 @@ static int iscsit_add_reject(
cmd->buf_ptr = kmemdup(buf, ISCSI_HDR_LEN, GFP_KERNEL);
if (!cmd->buf_ptr) {
pr_err("Unable to allocate memory for cmd->buf_ptr\n");
iscsit_release_cmd(cmd);
iscsit_free_cmd(cmd, false);
return -1;
}
@ -697,7 +697,7 @@ int iscsit_add_reject_from_cmd(
cmd->buf_ptr = kmemdup(buf, ISCSI_HDR_LEN, GFP_KERNEL);
if (!cmd->buf_ptr) {
pr_err("Unable to allocate memory for cmd->buf_ptr\n");
iscsit_release_cmd(cmd);
iscsit_free_cmd(cmd, false);
return -1;
}
@ -1743,7 +1743,7 @@ int iscsit_handle_nop_out(struct iscsi_conn *conn, struct iscsi_cmd *cmd,
return 0;
out:
if (cmd)
iscsit_release_cmd(cmd);
iscsit_free_cmd(cmd, false);
ping_out:
kfree(ping_data);
return ret;
@ -2251,7 +2251,7 @@ iscsit_handle_logout_cmd(struct iscsi_conn *conn, struct iscsi_cmd *cmd,
if (conn->conn_state != TARG_CONN_STATE_LOGGED_IN) {
pr_err("Received logout request on connection that"
" is not in logged in state, ignoring request.\n");
iscsit_release_cmd(cmd);
iscsit_free_cmd(cmd, false);
return 0;
}
@ -3665,7 +3665,7 @@ iscsit_immediate_queue(struct iscsi_conn *conn, struct iscsi_cmd *cmd, int state
list_del(&cmd->i_conn_node);
spin_unlock_bh(&conn->cmd_lock);
iscsit_free_cmd(cmd);
iscsit_free_cmd(cmd, false);
break;
case ISTATE_SEND_NOPIN_WANT_RESPONSE:
iscsit_mod_nopin_response_timer(conn);
@ -4122,7 +4122,7 @@ static void iscsit_release_commands_from_conn(struct iscsi_conn *conn)
iscsit_increment_maxcmdsn(cmd, sess);
iscsit_free_cmd(cmd);
iscsit_free_cmd(cmd, true);
spin_lock_bh(&conn->cmd_lock);
}

12
drivers/target/iscsi/iscsi_target_erl2.c
View File

@ -143,7 +143,7 @@ void iscsit_free_connection_recovery_entires(struct iscsi_session *sess)
list_del(&cmd->i_conn_node);
cmd->conn = NULL;
spin_unlock(&cr->conn_recovery_cmd_lock);
iscsit_free_cmd(cmd);
iscsit_free_cmd(cmd, true);
spin_lock(&cr->conn_recovery_cmd_lock);
}
spin_unlock(&cr->conn_recovery_cmd_lock);
@ -165,7 +165,7 @@ void iscsit_free_connection_recovery_entires(struct iscsi_session *sess)
list_del(&cmd->i_conn_node);
cmd->conn = NULL;
spin_unlock(&cr->conn_recovery_cmd_lock);
iscsit_free_cmd(cmd);
iscsit_free_cmd(cmd, true);
spin_lock(&cr->conn_recovery_cmd_lock);
}
spin_unlock(&cr->conn_recovery_cmd_lock);
@ -248,7 +248,7 @@ void iscsit_discard_cr_cmds_by_expstatsn(
iscsit_remove_cmd_from_connection_recovery(cmd, sess);
spin_unlock(&cr->conn_recovery_cmd_lock);
iscsit_free_cmd(cmd);
iscsit_free_cmd(cmd, true);
spin_lock(&cr->conn_recovery_cmd_lock);
}
spin_unlock(&cr->conn_recovery_cmd_lock);
@ -302,7 +302,7 @@ int iscsit_discard_unacknowledged_ooo_cmdsns_for_conn(struct iscsi_conn *conn)
list_del(&cmd->i_conn_node);
spin_unlock_bh(&conn->cmd_lock);
iscsit_free_cmd(cmd);
iscsit_free_cmd(cmd, true);
spin_lock_bh(&conn->cmd_lock);
}
spin_unlock_bh(&conn->cmd_lock);
@ -355,7 +355,7 @@ int iscsit_prepare_cmds_for_realligance(struct iscsi_conn *conn)
list_del(&cmd->i_conn_node);
spin_unlock_bh(&conn->cmd_lock);
iscsit_free_cmd(cmd);
iscsit_free_cmd(cmd, true);
spin_lock_bh(&conn->cmd_lock);
continue;
}
@ -375,7 +375,7 @@ int iscsit_prepare_cmds_for_realligance(struct iscsi_conn *conn)
iscsi_sna_gte(cmd->cmd_sn, conn->sess->exp_cmd_sn)) {
list_del(&cmd->i_conn_node);
spin_unlock_bh(&conn->cmd_lock);
iscsit_free_cmd(cmd);
iscsit_free_cmd(cmd, true);
spin_lock_bh(&conn->cmd_lock);
continue;
}

8
drivers/target/iscsi/iscsi_target_parameters.c
View File

@ -758,9 +758,9 @@ static int iscsi_add_notunderstood_response(
}
INIT_LIST_HEAD(&extra_response->er_list);
strncpy(extra_response->key, key, strlen(key) + 1);
strncpy(extra_response->value, NOTUNDERSTOOD,
strlen(NOTUNDERSTOOD) + 1);
strlcpy(extra_response->key, key, sizeof(extra_response->key));
strlcpy(extra_response->value, NOTUNDERSTOOD,
sizeof(extra_response->value));
list_add_tail(&extra_response->er_list,
&param_list->extra_response_list);
@ -1629,8 +1629,6 @@ int iscsi_decode_text_input(
if (phase & PHASE_SECURITY) {
if (iscsi_check_for_auth_key(key) > 0) {
char *tmpptr = key + strlen(key);
*tmpptr = '=';
kfree(tmpbuf);
return 1;
}

4
drivers/target/iscsi/iscsi_target_parameters.h
View File

@ -1,8 +1,10 @@
#ifndef ISCSI_PARAMETERS_H
#define ISCSI_PARAMETERS_H
#include <scsi/iscsi_proto.h>
struct iscsi_extra_response {
char key[64];
char key[KEY_MAXLEN];
char value[32];
struct list_head er_list;
} ____cacheline_aligned;

54
drivers/target/iscsi/iscsi_target_util.c
View File

@ -676,40 +676,56 @@ void iscsit_free_queue_reqs_for_conn(struct iscsi_conn *conn)
void iscsit_release_cmd(struct iscsi_cmd *cmd)
{
struct iscsi_conn *conn = cmd->conn;
iscsit_free_r2ts_from_list(cmd);
iscsit_free_all_datain_reqs(cmd);
kfree(cmd->buf_ptr);
kfree(cmd->pdu_list);
kfree(cmd->seq_list);
kfree(cmd->tmr_req);
kfree(cmd->iov_data);
if (conn) {
iscsit_remove_cmd_from_immediate_queue(cmd, conn);
iscsit_remove_cmd_from_response_queue(cmd, conn);
}
kmem_cache_free(lio_cmd_cache, cmd);
}
void iscsit_free_cmd(struct iscsi_cmd *cmd)
static 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);
}
}
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:
if (cmd->data_direction == DMA_TO_DEVICE)
iscsit_stop_dataout_timer(cmd);
se_cmd = &cmd->se_cmd;
__iscsit_free_cmd(cmd, true, shutdown);
/*
* Fallthrough
*/
case ISCSI_OP_SCSI_TMFUNC:
transport_generic_free_cmd(&cmd->se_cmd, 1);
rc = transport_generic_free_cmd(&cmd->se_cmd, 1);
if (!rc && shutdown && se_cmd && se_cmd->se_sess) {
__iscsit_free_cmd(cmd, true, shutdown);
target_put_sess_cmd(se_cmd->se_sess, se_cmd);
}
break;
case ISCSI_OP_REJECT:
/*
@ -718,11 +734,19 @@ void iscsit_free_cmd(struct iscsi_cmd *cmd)
* associated cmd->se_cmd needs to be released.
*/
if (cmd->se_cmd.se_tfo != NULL) {
transport_generic_free_cmd(&cmd->se_cmd, 1);
se_cmd = &cmd->se_cmd;
__iscsit_free_cmd(cmd, true, shutdown);
rc = transport_generic_free_cmd(&cmd->se_cmd, 1);
if (!rc && shutdown && se_cmd->se_sess) {
__iscsit_free_cmd(cmd, true, shutdown);
target_put_sess_cmd(se_cmd->se_sess, se_cmd);
}
break;
}
/* Fall-through */
default:
__iscsit_free_cmd(cmd, false, shutdown);
cmd->release_cmd(cmd);
break;
}

2
drivers/target/iscsi/iscsi_target_util.h
View File

@ -29,7 +29,7 @@ extern void iscsit_remove_cmd_from_tx_queues(struct iscsi_cmd *, struct iscsi_co
extern bool iscsit_conn_all_queues_empty(struct iscsi_conn *);
extern void iscsit_free_queue_reqs_for_conn(struct iscsi_conn *);
extern void iscsit_release_cmd(struct iscsi_cmd *);
extern void iscsit_free_cmd(struct iscsi_cmd *);
extern void iscsit_free_cmd(struct iscsi_cmd *, bool);
extern int iscsit_check_session_usage_count(struct iscsi_session *);
extern void iscsit_dec_session_usage_count(struct iscsi_session *);
extern void iscsit_inc_session_usage_count(struct iscsi_session *);

11
drivers/target/target_core_file.c
View File

@ -153,6 +153,7 @@ static int fd_configure_device(struct se_device *dev)
struct request_queue *q = bdev_get_queue(inode->i_bdev);
unsigned long long dev_size;
fd_dev->fd_block_size = bdev_logical_block_size(inode->i_bdev);
/*
* Determine the number of bytes from i_size_read() minus
* one (1) logical sector from underlying struct block_device
@ -199,6 +200,7 @@ static int fd_configure_device(struct se_device *dev)
goto fail;
}
fd_dev->fd_block_size = FD_BLOCKSIZE;
/*
* Limit UNMAP emulation to 8k Number of LBAs (NoLB)
*/
@ -217,9 +219,7 @@ static int fd_configure_device(struct se_device *dev)
dev->dev_attrib.max_write_same_len = 0x1000;
}
fd_dev->fd_block_size = dev->dev_attrib.hw_block_size;
dev->dev_attrib.hw_block_size = FD_BLOCKSIZE;
dev->dev_attrib.hw_block_size = fd_dev->fd_block_size;
dev->dev_attrib.hw_max_sectors = FD_MAX_SECTORS;
dev->dev_attrib.hw_queue_depth = FD_MAX_DEVICE_QUEUE_DEPTH;
@ -694,11 +694,12 @@ static sector_t fd_get_blocks(struct se_device *dev)
* to handle underlying block_device resize operations.
*/
if (S_ISBLK(i->i_mode))
dev_size = (i_size_read(i) - fd_dev->fd_block_size);
dev_size = i_size_read(i);
else
dev_size = fd_dev->fd_dev_size;
return div_u64(dev_size, dev->dev_attrib.block_size);
return div_u64(dev_size - dev->dev_attrib.block_size,
dev->dev_attrib.block_size);
}
static struct sbc_ops fd_sbc_ops = {

74
drivers/target/target_core_transport.c
View File

@ -65,7 +65,7 @@ static void transport_complete_task_attr(struct se_cmd *cmd);
static void transport_handle_queue_full(struct se_cmd *cmd,
struct se_device *dev);
static int transport_generic_get_mem(struct se_cmd *cmd);
static void transport_put_cmd(struct se_cmd *cmd);
static int transport_put_cmd(struct se_cmd *cmd);
static void target_complete_ok_work(struct work_struct *work);
int init_se_kmem_caches(void)
@ -221,6 +221,7 @@ struct se_session *transport_init_session(void)
INIT_LIST_HEAD(&se_sess->sess_list);
INIT_LIST_HEAD(&se_sess->sess_acl_list);
INIT_LIST_HEAD(&se_sess->sess_cmd_list);
INIT_LIST_HEAD(&se_sess->sess_wait_list);
spin_lock_init(&se_sess->sess_cmd_lock);
kref_init(&se_sess->sess_kref);
@ -1943,7 +1944,7 @@ static inline void transport_free_pages(struct se_cmd *cmd)
* This routine unconditionally frees a command, and reference counting
* or list removal must be done in the caller.
*/
static void transport_release_cmd(struct se_cmd *cmd)
static int transport_release_cmd(struct se_cmd *cmd)
{
BUG_ON(!cmd->se_tfo);
@ -1955,11 +1956,11 @@ static void transport_release_cmd(struct se_cmd *cmd)
* If this cmd has been setup with target_get_sess_cmd(), drop
* the kref and call ->release_cmd() in kref callback.
*/
if (cmd->check_release != 0) {
target_put_sess_cmd(cmd->se_sess, cmd);
return;
}
if (cmd->check_release != 0)
return target_put_sess_cmd(cmd->se_sess, cmd);
cmd->se_tfo->release_cmd(cmd);
return 1;
}
/**
@ -1968,7 +1969,7 @@ static void transport_release_cmd(struct se_cmd *cmd)
*
* This routine releases our reference to the command and frees it if possible.
*/
static void transport_put_cmd(struct se_cmd *cmd)
static int transport_put_cmd(struct se_cmd *cmd)
{
unsigned long flags;
@ -1976,7 +1977,7 @@ static void transport_put_cmd(struct se_cmd *cmd)
if (atomic_read(&cmd->t_fe_count) &&
!atomic_dec_and_test(&cmd->t_fe_count)) {
spin_unlock_irqrestore(&cmd->t_state_lock, flags);
return;
return 0;
}
if (cmd->transport_state & CMD_T_DEV_ACTIVE) {
@ -1986,8 +1987,7 @@ static void transport_put_cmd(struct se_cmd *cmd)
spin_unlock_irqrestore(&cmd->t_state_lock, flags);
transport_free_pages(cmd);
transport_release_cmd(cmd);
return;
return transport_release_cmd(cmd);
}
void *transport_kmap_data_sg(struct se_cmd *cmd)
@ -2152,13 +2152,15 @@ static void transport_write_pending_qf(struct se_cmd *cmd)
}
}
void transport_generic_free_cmd(struct se_cmd *cmd, int wait_for_tasks)
int transport_generic_free_cmd(struct se_cmd *cmd, int wait_for_tasks)
{
int ret = 0;
if (!(cmd->se_cmd_flags & SCF_SE_LUN_CMD)) {
if (wait_for_tasks && (cmd->se_cmd_flags & SCF_SCSI_TMR_CDB))
transport_wait_for_tasks(cmd);
transport_release_cmd(cmd);
ret = transport_release_cmd(cmd);
} else {
if (wait_for_tasks)
transport_wait_for_tasks(cmd);
@ -2166,8 +2168,9 @@ void transport_generic_free_cmd(struct se_cmd *cmd, int wait_for_tasks)
if (cmd->se_lun)
transport_lun_remove_cmd(cmd);
transport_put_cmd(cmd);
ret = transport_put_cmd(cmd);
}
return ret;
}
EXPORT_SYMBOL(transport_generic_free_cmd);
@ -2250,11 +2253,14 @@ void target_sess_cmd_list_set_waiting(struct se_session *se_sess)
unsigned long flags;
spin_lock_irqsave(&se_sess->sess_cmd_lock, flags);
WARN_ON(se_sess->sess_tearing_down);
if (se_sess->sess_tearing_down) {
spin_unlock_irqrestore(&se_sess->sess_cmd_lock, flags);
return;
}
se_sess->sess_tearing_down = 1;
list_splice_init(&se_sess->sess_cmd_list, &se_sess->sess_wait_list);
list_for_each_entry(se_cmd, &se_sess->sess_cmd_list, se_cmd_list)
list_for_each_entry(se_cmd, &se_sess->sess_wait_list, se_cmd_list)
se_cmd->cmd_wait_set = 1;
spin_unlock_irqrestore(&se_sess->sess_cmd_lock, flags);
@ -2263,44 +2269,32 @@ EXPORT_SYMBOL(target_sess_cmd_list_set_waiting);
/* target_wait_for_sess_cmds - Wait for outstanding descriptors
* @se_sess: session to wait for active I/O
* @wait_for_tasks: Make extra transport_wait_for_tasks call
*/
void target_wait_for_sess_cmds(
struct se_session *se_sess,
int wait_for_tasks)
void target_wait_for_sess_cmds(struct se_session *se_sess)
{
struct se_cmd *se_cmd, *tmp_cmd;
bool rc = false;
unsigned long flags;
list_for_each_entry_safe(se_cmd, tmp_cmd,
&se_sess->sess_cmd_list, se_cmd_list) {
&se_sess->sess_wait_list, se_cmd_list) {
list_del(&se_cmd->se_cmd_list);
pr_debug("Waiting for se_cmd: %p t_state: %d, fabric state:"
" %d\n", se_cmd, se_cmd->t_state,
se_cmd->se_tfo->get_cmd_state(se_cmd));
if (wait_for_tasks) {
pr_debug("Calling transport_wait_for_tasks se_cmd: %p t_state: %d,"
" fabric state: %d\n", se_cmd, se_cmd->t_state,
se_cmd->se_tfo->get_cmd_state(se_cmd));
rc = transport_wait_for_tasks(se_cmd);
pr_debug("After transport_wait_for_tasks se_cmd: %p t_state: %d,"
" fabric state: %d\n", se_cmd, se_cmd->t_state,
se_cmd->se_tfo->get_cmd_state(se_cmd));
}
if (!rc) {
wait_for_completion(&se_cmd->cmd_wait_comp);
pr_debug("After cmd_wait_comp: se_cmd: %p t_state: %d"
" fabric state: %d\n", se_cmd, se_cmd->t_state,
se_cmd->se_tfo->get_cmd_state(se_cmd));
}
wait_for_completion(&se_cmd->cmd_wait_comp);
pr_debug("After cmd_wait_comp: se_cmd: %p t_state: %d"
" fabric state: %d\n", se_cmd, se_cmd->t_state,
se_cmd->se_tfo->get_cmd_state(se_cmd));
se_cmd->se_tfo->release_cmd(se_cmd);
}
spin_lock_irqsave(&se_sess->sess_cmd_lock, flags);
WARN_ON(!list_empty(&se_sess->sess_cmd_list));
spin_unlock_irqrestore(&se_sess->sess_cmd_lock, flags);
}
EXPORT_SYMBOL(target_wait_for_sess_cmds);

1
include/target/target_core_base.h
View File

@ -543,6 +543,7 @@ struct se_session {
struct list_head sess_list;
struct list_head sess_acl_list;
struct list_head sess_cmd_list;
struct list_head sess_wait_list;
spinlock_t sess_cmd_lock;
struct kref sess_kref;
};

4
include/target/target_core_fabric.h
View File

@ -114,7 +114,7 @@ sense_reason_t transport_generic_new_cmd(struct se_cmd *);
void target_execute_cmd(struct se_cmd *cmd);
void transport_generic_free_cmd(struct se_cmd *, int);
int transport_generic_free_cmd(struct se_cmd *, int);
bool transport_wait_for_tasks(struct se_cmd *);
int transport_check_aborted_status(struct se_cmd *, int);
@ -123,7 +123,7 @@ int transport_send_check_condition_and_sense(struct se_cmd *,
int target_get_sess_cmd(struct se_session *, struct se_cmd *, bool);
int target_put_sess_cmd(struct se_session *, struct se_cmd *);
void target_sess_cmd_list_set_waiting(struct se_session *);
void target_wait_for_sess_cmds(struct se_session *, int);
void target_wait_for_sess_cmds(struct se_session *);
int core_alua_check_nonop_delay(struct se_cmd *);