Commit d703ce2f authored by Nicholas Bellinger's avatar Nicholas Bellinger Committed by Nicholas Bellinger
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iscsi/iser-target: Convert to command priv_size usage



This command converts iscsi/isert-target to use allocations based on
iscsit_transport->priv_size within iscsit_allocate_cmd(), instead of
using an embedded isert_cmd->iscsi_cmd.

This includes removing iscsit_transport->alloc_cmd() usage, along
with updating isert-target code to use iscsit_priv_cmd().

Also, remove left-over iscsit_transport->release_cmd() usage for
direct calls to iscsit_release_cmd(), and drop the now unused
lio_cmd_cache and isert_cmd_cache.

Cc: Or Gerlitz <ogerlitz@mellanox.com>
Cc: Kent Overstreet <kmo@daterainc.com>
Signed-off-by: default avatarNicholas Bellinger <nab@daterainc.com>
parent 3aee26b4
......@@ -39,7 +39,6 @@ static DEFINE_MUTEX(device_list_mutex);
static LIST_HEAD(device_list);
static struct workqueue_struct *isert_rx_wq;
static struct workqueue_struct *isert_comp_wq;
static struct kmem_cache *isert_cmd_cache;
static void
isert_qp_event_callback(struct ib_event *e, void *context)
......@@ -876,43 +875,30 @@ isert_rx_login_req(struct iser_rx_desc *rx_desc, int rx_buflen,
schedule_delayed_work(&conn->login_work, 0);
}
static void
isert_release_cmd(struct iscsi_cmd *cmd)
{
struct isert_cmd *isert_cmd = container_of(cmd, struct isert_cmd,
iscsi_cmd);
pr_debug("Entering isert_release_cmd %p >>>>>>>>>>>>>>>.\n", isert_cmd);
kfree(cmd->buf_ptr);
kfree(cmd->tmr_req);
kmem_cache_free(isert_cmd_cache, isert_cmd);
}
static struct iscsi_cmd
*isert_alloc_cmd(struct iscsi_conn *conn, gfp_t gfp)
*isert_allocate_cmd(struct iscsi_conn *conn, gfp_t gfp)
{
struct isert_conn *isert_conn = (struct isert_conn *)conn->context;
struct isert_cmd *isert_cmd;
struct iscsi_cmd *cmd;
isert_cmd = kmem_cache_zalloc(isert_cmd_cache, gfp);
if (!isert_cmd) {
pr_err("Unable to allocate isert_cmd\n");
cmd = iscsit_allocate_cmd(conn, gfp);
if (!cmd) {
pr_err("Unable to allocate iscsi_cmd + isert_cmd\n");
return NULL;
}
isert_cmd = iscsit_priv_cmd(cmd);
isert_cmd->conn = isert_conn;
isert_cmd->iscsi_cmd.release_cmd = &isert_release_cmd;
isert_cmd->iscsi_cmd = cmd;
return &isert_cmd->iscsi_cmd;
return cmd;
}
static int
isert_handle_scsi_cmd(struct isert_conn *isert_conn,
struct isert_cmd *isert_cmd, struct iser_rx_desc *rx_desc,
unsigned char *buf)
struct isert_cmd *isert_cmd, struct iscsi_cmd *cmd,
struct iser_rx_desc *rx_desc, unsigned char *buf)
{
struct iscsi_cmd *cmd = &isert_cmd->iscsi_cmd;
struct iscsi_conn *conn = isert_conn->conn;
struct iscsi_scsi_req *hdr = (struct iscsi_scsi_req *)buf;
struct scatterlist *sg;
......@@ -1019,9 +1005,9 @@ isert_handle_iscsi_dataout(struct isert_conn *isert_conn,
static int
isert_handle_nop_out(struct isert_conn *isert_conn, struct isert_cmd *isert_cmd,
struct iser_rx_desc *rx_desc, unsigned char *buf)
struct iscsi_cmd *cmd, struct iser_rx_desc *rx_desc,
unsigned char *buf)
{
struct iscsi_cmd *cmd = &isert_cmd->iscsi_cmd;
struct iscsi_conn *conn = isert_conn->conn;
struct iscsi_nopout *hdr = (struct iscsi_nopout *)buf;
int rc;
......@@ -1038,9 +1024,9 @@ isert_handle_nop_out(struct isert_conn *isert_conn, struct isert_cmd *isert_cmd,
static int
isert_handle_text_cmd(struct isert_conn *isert_conn, struct isert_cmd *isert_cmd,
struct iser_rx_desc *rx_desc, struct iscsi_text *hdr)
struct iscsi_cmd *cmd, struct iser_rx_desc *rx_desc,
struct iscsi_text *hdr)
{
struct iscsi_cmd *cmd = &isert_cmd->iscsi_cmd;
struct iscsi_conn *conn = isert_conn->conn;
u32 payload_length = ntoh24(hdr->dlength);
int rc;
......@@ -1085,26 +1071,26 @@ isert_rx_opcode(struct isert_conn *isert_conn, struct iser_rx_desc *rx_desc,
switch (opcode) {
case ISCSI_OP_SCSI_CMD:
cmd = iscsit_allocate_cmd(conn, GFP_KERNEL);
cmd = isert_allocate_cmd(conn, GFP_KERNEL);
if (!cmd)
break;
isert_cmd = container_of(cmd, struct isert_cmd, iscsi_cmd);
isert_cmd = iscsit_priv_cmd(cmd);
isert_cmd->read_stag = read_stag;
isert_cmd->read_va = read_va;
isert_cmd->write_stag = write_stag;
isert_cmd->write_va = write_va;
ret = isert_handle_scsi_cmd(isert_conn, isert_cmd,
ret = isert_handle_scsi_cmd(isert_conn, isert_cmd, cmd,
rx_desc, (unsigned char *)hdr);
break;
case ISCSI_OP_NOOP_OUT:
cmd = iscsit_allocate_cmd(conn, GFP_KERNEL);
cmd = isert_allocate_cmd(conn, GFP_KERNEL);
if (!cmd)
break;
isert_cmd = container_of(cmd, struct isert_cmd, iscsi_cmd);
ret = isert_handle_nop_out(isert_conn, isert_cmd,
isert_cmd = iscsit_priv_cmd(cmd);
ret = isert_handle_nop_out(isert_conn, isert_cmd, cmd,
rx_desc, (unsigned char *)hdr);
break;
case ISCSI_OP_SCSI_DATA_OUT:
......@@ -1112,7 +1098,7 @@ isert_rx_opcode(struct isert_conn *isert_conn, struct iser_rx_desc *rx_desc,
(unsigned char *)hdr);
break;
case ISCSI_OP_SCSI_TMFUNC:
cmd = iscsit_allocate_cmd(conn, GFP_KERNEL);
cmd = isert_allocate_cmd(conn, GFP_KERNEL);
if (!cmd)
break;
......@@ -1120,7 +1106,7 @@ isert_rx_opcode(struct isert_conn *isert_conn, struct iser_rx_desc *rx_desc,
(unsigned char *)hdr);
break;
case ISCSI_OP_LOGOUT:
cmd = iscsit_allocate_cmd(conn, GFP_KERNEL);
cmd = isert_allocate_cmd(conn, GFP_KERNEL);
if (!cmd)
break;
......@@ -1131,12 +1117,12 @@ isert_rx_opcode(struct isert_conn *isert_conn, struct iser_rx_desc *rx_desc,
HZ);
break;
case ISCSI_OP_TEXT:
cmd = iscsit_allocate_cmd(conn, GFP_KERNEL);
cmd = isert_allocate_cmd(conn, GFP_KERNEL);
if (!cmd)
break;
isert_cmd = container_of(cmd, struct isert_cmd, iscsi_cmd);
ret = isert_handle_text_cmd(isert_conn, isert_cmd,
isert_cmd = iscsit_priv_cmd(cmd);
ret = isert_handle_text_cmd(isert_conn, isert_cmd, cmd,
rx_desc, (struct iscsi_text *)hdr);
break;
default:
......@@ -1264,7 +1250,7 @@ isert_unmap_cmd(struct isert_cmd *isert_cmd, struct isert_conn *isert_conn)
static void
isert_put_cmd(struct isert_cmd *isert_cmd)
{
struct iscsi_cmd *cmd = &isert_cmd->iscsi_cmd;
struct iscsi_cmd *cmd = isert_cmd->iscsi_cmd;
struct isert_conn *isert_conn = isert_cmd->conn;
struct iscsi_conn *conn = isert_conn->conn;
......@@ -1315,7 +1301,7 @@ isert_put_cmd(struct isert_cmd *isert_cmd)
* Fall-through
*/
default:
isert_release_cmd(cmd);
iscsit_release_cmd(cmd);
break;
}
}
......@@ -1351,7 +1337,7 @@ isert_completion_rdma_read(struct iser_tx_desc *tx_desc,
struct isert_cmd *isert_cmd)
{
struct isert_rdma_wr *wr = &isert_cmd->rdma_wr;
struct iscsi_cmd *cmd = &isert_cmd->iscsi_cmd;
struct iscsi_cmd *cmd = isert_cmd->iscsi_cmd;
struct se_cmd *se_cmd = &cmd->se_cmd;
struct ib_device *ib_dev = isert_cmd->conn->conn_cm_id->device;
......@@ -1387,7 +1373,7 @@ isert_do_control_comp(struct work_struct *work)
struct isert_cmd, comp_work);
struct isert_conn *isert_conn = isert_cmd->conn;
struct ib_device *ib_dev = isert_conn->conn_cm_id->device;
struct iscsi_cmd *cmd = &isert_cmd->iscsi_cmd;
struct iscsi_cmd *cmd = isert_cmd->iscsi_cmd;
switch (cmd->i_state) {
case ISTATE_SEND_TASKMGTRSP:
......@@ -1433,7 +1419,7 @@ isert_response_completion(struct iser_tx_desc *tx_desc,
struct isert_conn *isert_conn,
struct ib_device *ib_dev)
{
struct iscsi_cmd *cmd = &isert_cmd->iscsi_cmd;
struct iscsi_cmd *cmd = isert_cmd->iscsi_cmd;
if (cmd->i_state == ISTATE_SEND_TASKMGTRSP ||
cmd->i_state == ISTATE_SEND_LOGOUTRSP ||
......@@ -1625,8 +1611,7 @@ isert_post_response(struct isert_conn *isert_conn, struct isert_cmd *isert_cmd)
static int
isert_put_response(struct iscsi_conn *conn, struct iscsi_cmd *cmd)
{
struct isert_cmd *isert_cmd = container_of(cmd,
struct isert_cmd, iscsi_cmd);
struct isert_cmd *isert_cmd = iscsit_priv_cmd(cmd);
struct isert_conn *isert_conn = (struct isert_conn *)conn->context;
struct ib_send_wr *send_wr = &isert_cmd->tx_desc.send_wr;
struct iscsi_scsi_rsp *hdr = (struct iscsi_scsi_rsp *)
......@@ -1675,8 +1660,7 @@ static int
isert_put_nopin(struct iscsi_cmd *cmd, struct iscsi_conn *conn,
bool nopout_response)
{
struct isert_cmd *isert_cmd = container_of(cmd,
struct isert_cmd, iscsi_cmd);
struct isert_cmd *isert_cmd = iscsit_priv_cmd(cmd);
struct isert_conn *isert_conn = (struct isert_conn *)conn->context;
struct ib_send_wr *send_wr = &isert_cmd->tx_desc.send_wr;
......@@ -1695,8 +1679,7 @@ isert_put_nopin(struct iscsi_cmd *cmd, struct iscsi_conn *conn,
static int
isert_put_logout_rsp(struct iscsi_cmd *cmd, struct iscsi_conn *conn)
{
struct isert_cmd *isert_cmd = container_of(cmd,
struct isert_cmd, iscsi_cmd);
struct isert_cmd *isert_cmd = iscsit_priv_cmd(cmd);
struct isert_conn *isert_conn = (struct isert_conn *)conn->context;
struct ib_send_wr *send_wr = &isert_cmd->tx_desc.send_wr;
......@@ -1714,8 +1697,7 @@ isert_put_logout_rsp(struct iscsi_cmd *cmd, struct iscsi_conn *conn)
static int
isert_put_tm_rsp(struct iscsi_cmd *cmd, struct iscsi_conn *conn)
{
struct isert_cmd *isert_cmd = container_of(cmd,
struct isert_cmd, iscsi_cmd);
struct isert_cmd *isert_cmd = iscsit_priv_cmd(cmd);
struct isert_conn *isert_conn = (struct isert_conn *)conn->context;
struct ib_send_wr *send_wr = &isert_cmd->tx_desc.send_wr;
......@@ -1733,8 +1715,7 @@ isert_put_tm_rsp(struct iscsi_cmd *cmd, struct iscsi_conn *conn)
static int
isert_put_reject(struct iscsi_cmd *cmd, struct iscsi_conn *conn)
{
struct isert_cmd *isert_cmd = container_of(cmd,
struct isert_cmd, iscsi_cmd);
struct isert_cmd *isert_cmd = iscsit_priv_cmd(cmd);
struct isert_conn *isert_conn = (struct isert_conn *)conn->context;
struct ib_send_wr *send_wr = &isert_cmd->tx_desc.send_wr;
struct ib_device *ib_dev = isert_conn->conn_cm_id->device;
......@@ -1766,8 +1747,7 @@ isert_put_reject(struct iscsi_cmd *cmd, struct iscsi_conn *conn)
static int
isert_put_text_rsp(struct iscsi_cmd *cmd, struct iscsi_conn *conn)
{
struct isert_cmd *isert_cmd = container_of(cmd,
struct isert_cmd, iscsi_cmd);
struct isert_cmd *isert_cmd = iscsit_priv_cmd(cmd);
struct isert_conn *isert_conn = (struct isert_conn *)conn->context;
struct ib_send_wr *send_wr = &isert_cmd->tx_desc.send_wr;
struct iscsi_text_rsp *hdr =
......@@ -1809,7 +1789,7 @@ isert_build_rdma_wr(struct isert_conn *isert_conn, struct isert_cmd *isert_cmd,
struct ib_sge *ib_sge, struct ib_send_wr *send_wr,
u32 data_left, u32 offset)
{
struct iscsi_cmd *cmd = &isert_cmd->iscsi_cmd;
struct iscsi_cmd *cmd = isert_cmd->iscsi_cmd;
struct scatterlist *sg_start, *tmp_sg;
struct ib_device *ib_dev = isert_conn->conn_cm_id->device;
u32 sg_off, page_off;
......@@ -1854,8 +1834,7 @@ static int
isert_put_datain(struct iscsi_conn *conn, struct iscsi_cmd *cmd)
{
struct se_cmd *se_cmd = &cmd->se_cmd;
struct isert_cmd *isert_cmd = container_of(cmd,
struct isert_cmd, iscsi_cmd);
struct isert_cmd *isert_cmd = iscsit_priv_cmd(cmd);
struct isert_rdma_wr *wr = &isert_cmd->rdma_wr;
struct isert_conn *isert_conn = (struct isert_conn *)conn->context;
struct ib_send_wr *wr_failed, *send_wr;
......@@ -1958,8 +1937,7 @@ static int
isert_get_dataout(struct iscsi_conn *conn, struct iscsi_cmd *cmd, bool recovery)
{
struct se_cmd *se_cmd = &cmd->se_cmd;
struct isert_cmd *isert_cmd = container_of(cmd,
struct isert_cmd, iscsi_cmd);
struct isert_cmd *isert_cmd = iscsit_priv_cmd(cmd);
struct isert_rdma_wr *wr = &isert_cmd->rdma_wr;
struct isert_conn *isert_conn = (struct isert_conn *)conn->context;
struct ib_send_wr *wr_failed, *send_wr;
......@@ -2405,12 +2383,12 @@ static void isert_free_conn(struct iscsi_conn *conn)
static struct iscsit_transport iser_target_transport = {
.name = "IB/iSER",
.transport_type = ISCSI_INFINIBAND,
.priv_size = sizeof(struct isert_cmd),
.owner = THIS_MODULE,
.iscsit_setup_np = isert_setup_np,
.iscsit_accept_np = isert_accept_np,
.iscsit_free_np = isert_free_np,
.iscsit_free_conn = isert_free_conn,
.iscsit_alloc_cmd = isert_alloc_cmd,
.iscsit_get_login_rx = isert_get_login_rx,
.iscsit_put_login_tx = isert_put_login_tx,
.iscsit_immediate_queue = isert_immediate_queue,
......@@ -2437,21 +2415,10 @@ static int __init isert_init(void)
goto destroy_rx_wq;
}
isert_cmd_cache = kmem_cache_create("isert_cmd_cache",
sizeof(struct isert_cmd), __alignof__(struct isert_cmd),
0, NULL);
if (!isert_cmd_cache) {
pr_err("Unable to create isert_cmd_cache\n");
ret = -ENOMEM;
goto destroy_tx_cq;
}
iscsit_register_transport(&iser_target_transport);
pr_debug("iSER_TARGET[0] - Loaded iser_target_transport\n");
return 0;
destroy_tx_cq:
destroy_workqueue(isert_comp_wq);
destroy_rx_wq:
destroy_workqueue(isert_rx_wq);
return ret;
......@@ -2459,7 +2426,6 @@ static int __init isert_init(void)
static void __exit isert_exit(void)
{
kmem_cache_destroy(isert_cmd_cache);
destroy_workqueue(isert_comp_wq);
destroy_workqueue(isert_rx_wq);
iscsit_unregister_transport(&iser_target_transport);
......
......@@ -67,7 +67,7 @@ struct isert_cmd {
u32 write_va_off;
u32 rdma_wr_num;
struct isert_conn *conn;
struct iscsi_cmd iscsi_cmd;
struct iscsi_cmd *iscsi_cmd;
struct ib_sge *ib_sge;
struct iser_tx_desc tx_desc;
struct isert_rdma_wr rdma_wr;
......
......@@ -63,7 +63,6 @@ spinlock_t sess_idr_lock;
struct iscsit_global *iscsit_global;
struct kmem_cache *lio_cmd_cache;
struct kmem_cache *lio_qr_cache;
struct kmem_cache *lio_dr_cache;
struct kmem_cache *lio_ooo_cache;
......@@ -500,7 +499,6 @@ static struct iscsit_transport iscsi_target_transport = {
.iscsit_setup_np = iscsit_setup_np,
.iscsit_accept_np = iscsit_accept_np,
.iscsit_free_np = iscsit_free_np,
.iscsit_alloc_cmd = iscsit_alloc_cmd,
.iscsit_get_login_rx = iscsit_get_login_rx,
.iscsit_put_login_tx = iscsit_put_login_tx,
.iscsit_get_dataout = iscsit_build_r2ts_for_cmd,
......@@ -541,22 +539,13 @@ static int __init iscsi_target_init_module(void)
goto ts_out1;
}
lio_cmd_cache = kmem_cache_create("lio_cmd_cache",
sizeof(struct iscsi_cmd), __alignof__(struct iscsi_cmd),
0, NULL);
if (!lio_cmd_cache) {
pr_err("Unable to kmem_cache_create() for"
" lio_cmd_cache\n");
goto ts_out2;
}
lio_qr_cache = kmem_cache_create("lio_qr_cache",
sizeof(struct iscsi_queue_req),
__alignof__(struct iscsi_queue_req), 0, NULL);
if (!lio_qr_cache) {
pr_err("nable to kmem_cache_create() for"
" lio_qr_cache\n");
goto cmd_out;
goto ts_out2;
}
lio_dr_cache = kmem_cache_create("lio_dr_cache",
......@@ -600,8 +589,6 @@ static int __init iscsi_target_init_module(void)
kmem_cache_destroy(lio_dr_cache);
qr_out:
kmem_cache_destroy(lio_qr_cache);
cmd_out:
kmem_cache_destroy(lio_cmd_cache);
ts_out2:
iscsi_deallocate_thread_sets();
ts_out1:
......@@ -619,7 +606,6 @@ static void __exit iscsi_target_cleanup_module(void)
iscsi_thread_set_free();
iscsit_release_discovery_tpg();
iscsit_unregister_transport(&iscsi_target_transport);
kmem_cache_destroy(lio_cmd_cache);
kmem_cache_destroy(lio_qr_cache);
kmem_cache_destroy(lio_dr_cache);
kmem_cache_destroy(lio_ooo_cache);
......
......@@ -39,7 +39,6 @@ extern struct target_fabric_configfs *lio_target_fabric_configfs;
extern struct kmem_cache *lio_dr_cache;
extern struct kmem_cache *lio_ooo_cache;
extern struct kmem_cache *lio_cmd_cache;
extern struct kmem_cache *lio_qr_cache;
extern struct kmem_cache *lio_r2t_cache;
......
......@@ -1925,7 +1925,7 @@ static void lio_release_cmd(struct se_cmd *se_cmd)
struct iscsi_cmd *cmd = container_of(se_cmd, struct iscsi_cmd, se_cmd);
pr_debug("Entering lio_release_cmd for se_cmd: %p\n", se_cmd);
cmd->release_cmd(cmd);
iscsit_release_cmd(cmd);
}
/* End functions for target_core_fabric_ops */
......
......@@ -489,7 +489,6 @@ struct iscsi_cmd {
u32 first_data_sg_off;
u32 kmapped_nents;
sense_reason_t sense_reason;
void (*release_cmd)(struct iscsi_cmd *);
} ____cacheline_aligned;
struct iscsi_tmr_req {
......
......@@ -149,18 +149,6 @@ void iscsit_free_r2ts_from_list(struct iscsi_cmd *cmd)
spin_unlock_bh(&cmd->r2t_lock);
}
struct iscsi_cmd *iscsit_alloc_cmd(struct iscsi_conn *conn, gfp_t gfp_mask)
{
struct iscsi_cmd *cmd;
cmd = kmem_cache_zalloc(lio_cmd_cache, gfp_mask);
if (!cmd)
return NULL;
cmd->release_cmd = &iscsit_release_cmd;
return cmd;
}
/*
* May be called from software interrupt (timer) context for allocating
* iSCSI NopINs.
......@@ -168,8 +156,9 @@ struct iscsi_cmd *iscsit_alloc_cmd(struct iscsi_conn *conn, gfp_t gfp_mask)
struct iscsi_cmd *iscsit_allocate_cmd(struct iscsi_conn *conn, gfp_t gfp_mask)
{
struct iscsi_cmd *cmd;
int priv_size = conn->conn_transport->priv_size;
cmd = conn->conn_transport->iscsit_alloc_cmd(conn, gfp_mask);
cmd = kzalloc(sizeof(struct iscsi_cmd) + priv_size, gfp_mask);
if (!cmd) {
pr_err("Unable to allocate memory for struct iscsi_cmd.\n");
return NULL;
......@@ -696,8 +685,9 @@ void iscsit_release_cmd(struct iscsi_cmd *cmd)
kfree(cmd->iov_data);
kfree(cmd->text_in_ptr);
kmem_cache_free(lio_cmd_cache, cmd);
kfree(cmd);
}
EXPORT_SYMBOL(iscsit_release_cmd);
static void __iscsit_free_cmd(struct iscsi_cmd *cmd, bool scsi_cmd,
bool check_queues)
......@@ -761,7 +751,7 @@ void iscsit_free_cmd(struct iscsi_cmd *cmd, bool shutdown)
/* Fall-through */
default:
__iscsit_free_cmd(cmd, false, shutdown);
cmd->release_cmd(cmd);
iscsit_release_cmd(cmd);
break;
}
}
......
......@@ -6,13 +6,13 @@ struct iscsit_transport {
#define ISCSIT_TRANSPORT_NAME 16
char name[ISCSIT_TRANSPORT_NAME];
int transport_type;
int priv_size;
struct module *owner;
struct list_head t_node;
int (*iscsit_setup_np)(struct iscsi_np *, struct __kernel_sockaddr_storage *);
int (*iscsit_accept_np)(struct iscsi_np *, struct iscsi_conn *);
void (*iscsit_free_np)(struct iscsi_np *);
void (*iscsit_free_conn)(struct iscsi_conn *);
struct iscsi_cmd *(*iscsit_alloc_cmd)(struct iscsi_conn *, gfp_t);
int (*iscsit_get_login_rx)(struct iscsi_conn *, struct iscsi_login *);
int (*iscsit_put_login_tx)(struct iscsi_conn *, struct iscsi_login *, u32);
int (*iscsit_immediate_queue)(struct iscsi_conn *, struct iscsi_cmd *, int);
......@@ -22,6 +22,11 @@ struct iscsit_transport {
int (*iscsit_queue_status)(struct iscsi_conn *, struct iscsi_cmd *);
};
static inline void *iscsit_priv_cmd(struct iscsi_cmd *cmd)
{
return (void *)(cmd + 1);
}
/*
* From iscsi_target_transport.c
*/
......@@ -92,3 +97,4 @@ extern int iscsit_tmr_post_handler(struct iscsi_cmd *, struct iscsi_conn *);
extern struct iscsi_cmd *iscsit_allocate_cmd(struct iscsi_conn *, gfp_t);
extern int iscsit_sequence_cmd(struct iscsi_conn *, struct iscsi_cmd *,
unsigned char *, __be32);
extern void iscsit_release_cmd(struct iscsi_cmd *);
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