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authorNicholas Bellinger <nab@linux-iscsi.org>2013-03-06 22:09:17 -0800
committerNicholas Bellinger <nab@linux-iscsi.org>2013-04-25 01:05:27 -0700
commitcdb726651c357c19c02b17ee3c99a224b03022b6 (patch)
tree536be3108d6f25ce95bff4d02fd966d58b0b466a /drivers/target
parent03aa207060e395282c5ea0c055e2050b35803b4d (diff)
downloadlinux-cdb726651c357c19c02b17ee3c99a224b03022b6.tar.gz
iscsi-target: Add per transport iscsi_cmd alloc/free
This patch converts struct iscsi_cmd memory allocation + free to use ->iscsit_alloc_cmd() iscsit_transport API caller, and export iscsit_allocate_cmd() symbols Also add iscsi_cmd->release_cmd() to be used seperately from iscsit_transport for connection/session shutdown. v2 changes: - Remove unnecessary checks in iscsit_alloc_cmd (asias) - Drop iscsit_transport->iscsit_free_cmd() usage - Drop iscsit_transport->iscsit_unmap_cmd() usage - Add iscsi_cmd->release_cmd() - Convert lio_release_cmd() to use iscsi_cmd->release_cmd() Signed-off-by: Nicholas Bellinger <nab@linux-iscsi.org>
Diffstat (limited to 'drivers/target')
-rw-r--r--drivers/target/iscsi/iscsi_target.c1
-rw-r--r--drivers/target/iscsi/iscsi_target_configfs.c3
-rw-r--r--drivers/target/iscsi/iscsi_target_core.h1
-rw-r--r--drivers/target/iscsi/iscsi_target_util.c25
-rw-r--r--drivers/target/iscsi/iscsi_target_util.h1
5 files changed, 26 insertions, 5 deletions
diff --git a/drivers/target/iscsi/iscsi_target.c b/drivers/target/iscsi/iscsi_target.c
index 8203bf3de84..b01a10eae36 100644
--- a/drivers/target/iscsi/iscsi_target.c
+++ b/drivers/target/iscsi/iscsi_target.c
@@ -489,6 +489,7 @@ 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,
};
diff --git a/drivers/target/iscsi/iscsi_target_configfs.c b/drivers/target/iscsi/iscsi_target_configfs.c
index 78d75c8567d..c78b824194e 100644
--- a/drivers/target/iscsi/iscsi_target_configfs.c
+++ b/drivers/target/iscsi/iscsi_target_configfs.c
@@ -1700,7 +1700,8 @@ static void lio_release_cmd(struct se_cmd *se_cmd)
{
struct iscsi_cmd *cmd = container_of(se_cmd, struct iscsi_cmd, se_cmd);
- iscsit_release_cmd(cmd);
+ pr_debug("Entering lio_release_cmd for se_cmd: %p\n", se_cmd);
+ cmd->release_cmd(cmd);
}
/* End functions for target_core_fabric_ops */
diff --git a/drivers/target/iscsi/iscsi_target_core.h b/drivers/target/iscsi/iscsi_target_core.h
index 53400b0bf71..60ec4b92be0 100644
--- a/drivers/target/iscsi/iscsi_target_core.h
+++ b/drivers/target/iscsi/iscsi_target_core.h
@@ -485,6 +485,7 @@ 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 {
diff --git a/drivers/target/iscsi/iscsi_target_util.c b/drivers/target/iscsi/iscsi_target_util.c
index 4cf1e7f94ac..0b73f90c9c5 100644
--- a/drivers/target/iscsi/iscsi_target_util.c
+++ b/drivers/target/iscsi/iscsi_target_util.c
@@ -149,6 +149,18 @@ 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.
@@ -157,13 +169,12 @@ struct iscsi_cmd *iscsit_allocate_cmd(struct iscsi_conn *conn, gfp_t gfp_mask)
{
struct iscsi_cmd *cmd;
- cmd = kmem_cache_zalloc(lio_cmd_cache, gfp_mask);
+ cmd = conn->conn_transport->iscsit_alloc_cmd(conn, gfp_mask);
if (!cmd) {
pr_err("Unable to allocate memory for struct iscsi_cmd.\n");
return NULL;
}
-
- cmd->conn = conn;
+ cmd->conn = conn;
INIT_LIST_HEAD(&cmd->i_conn_node);
INIT_LIST_HEAD(&cmd->datain_list);
INIT_LIST_HEAD(&cmd->cmd_r2t_list);
@@ -176,6 +187,7 @@ struct iscsi_cmd *iscsit_allocate_cmd(struct iscsi_conn *conn, gfp_t gfp_mask)
return cmd;
}
+EXPORT_SYMBOL(iscsit_allocate_cmd);
struct iscsi_seq *iscsit_get_seq_holder_for_datain(
struct iscsi_cmd *cmd,
@@ -690,6 +702,11 @@ void iscsit_free_cmd(struct iscsi_cmd *cmd)
*/
switch (cmd->iscsi_opcode) {
case ISCSI_OP_SCSI_CMD:
+ if (cmd->data_direction == DMA_TO_DEVICE)
+ iscsit_stop_dataout_timer(cmd);
+ /*
+ * Fallthrough
+ */
case ISCSI_OP_SCSI_TMFUNC:
transport_generic_free_cmd(&cmd->se_cmd, 1);
break;
@@ -705,7 +722,7 @@ void iscsit_free_cmd(struct iscsi_cmd *cmd)
}
/* Fall-through */
default:
- iscsit_release_cmd(cmd);
+ cmd->release_cmd(cmd);
break;
}
}
diff --git a/drivers/target/iscsi/iscsi_target_util.h b/drivers/target/iscsi/iscsi_target_util.h
index 894d0f83792..4f8e01a4708 100644
--- a/drivers/target/iscsi/iscsi_target_util.h
+++ b/drivers/target/iscsi/iscsi_target_util.h
@@ -8,6 +8,7 @@ extern struct iscsi_r2t *iscsit_get_r2t_for_eos(struct iscsi_cmd *, u32, u32);
extern struct iscsi_r2t *iscsit_get_r2t_from_list(struct iscsi_cmd *);
extern void iscsit_free_r2t(struct iscsi_r2t *, struct iscsi_cmd *);
extern void iscsit_free_r2ts_from_list(struct iscsi_cmd *);
+extern struct iscsi_cmd *iscsit_alloc_cmd(struct iscsi_conn *, gfp_t);
extern struct iscsi_cmd *iscsit_allocate_cmd(struct iscsi_conn *, gfp_t);
extern struct iscsi_seq *iscsit_get_seq_holder_for_datain(struct iscsi_cmd *, u32);
extern struct iscsi_seq *iscsit_get_seq_holder_for_r2t(struct iscsi_cmd *);