target: Add TFO->abort_task for aborted task resources release
Now that TASK_ABORTED status is not generated for all cases by
TMR ABORT_TASK + LUN_RESET, a new TFO->abort_task() caller is
necessary in order to give fabric drivers a chance to unmap
hardware / software resources before the se_cmd descriptor is
released via the normal TFO->release_cmd() codepath.
This patch adds TFO->aborted_task() in core_tmr_abort_task()
in place of the original transport_send_task_abort(), and
also updates all fabric drivers to implement this caller.
The fabric drivers that include changes to perform cleanup
via ->aborted_task() are:
- iscsi-target
- iser-target
- srpt
- tcm_qla2xxx
The fabric drivers that currently set ->aborted_task() to
NOPs are:
- loopback
- tcm_fc
- usb-gadget
- sbp-target
- vhost-scsi
For the latter five, there appears to be no additional cleanup
required before invoking TFO->release_cmd() to release the
se_cmd descriptor.
v2 changes:
- Move ->aborted_task() call into transport_cmd_finish_abort (Alex)
Cc: Alex Leung <amleung21@yahoo.com>
Cc: Mark Rustad <mark.d.rustad@intel.com>
Cc: Roland Dreier <roland@kernel.org>
Cc: Vu Pham <vu@mellanox.com>
Cc: Chris Boot <bootc@bootc.net>
Cc: Sebastian Andrzej Siewior <bigeasy@linutronix.de>
Cc: Michael S. Tsirkin <mst@redhat.com>
Cc: Giridhar Malavali <giridhar.malavali@qlogic.com>
Cc: Saurav Kashyap <saurav.kashyap@qlogic.com>
Cc: Quinn Tran <quinn.tran@qlogic.com>
Cc: Sagi Grimberg <sagig@mellanox.com>
Cc: Or Gerlitz <ogerlitz@mellanox.com>
Signed-off-by: Nicholas Bellinger <nab@linux-iscsi.org>
diff --git a/drivers/target/iscsi/iscsi_target.c b/drivers/target/iscsi/iscsi_target.c
index df0456a..27f37c9 100644
--- a/drivers/target/iscsi/iscsi_target.c
+++ b/drivers/target/iscsi/iscsi_target.c
@@ -499,6 +499,18 @@
return 0;
}
+static void iscsit_aborted_task(struct iscsi_conn *conn, struct iscsi_cmd *cmd)
+{
+ bool scsi_cmd = (cmd->iscsi_opcode == ISCSI_OP_SCSI_CMD);
+
+ spin_lock_bh(&conn->cmd_lock);
+ if (!list_empty(&cmd->i_conn_node))
+ list_del_init(&cmd->i_conn_node);
+ spin_unlock_bh(&conn->cmd_lock);
+
+ __iscsit_free_cmd(cmd, scsi_cmd, true);
+}
+
static struct iscsit_transport iscsi_target_transport = {
.name = "iSCSI/TCP",
.transport_type = ISCSI_TCP,
@@ -513,6 +525,7 @@
.iscsit_response_queue = iscsit_response_queue,
.iscsit_queue_data_in = iscsit_queue_rsp,
.iscsit_queue_status = iscsit_queue_rsp,
+ .iscsit_aborted_task = iscsit_aborted_task,
};
static int __init iscsi_target_init_module(void)
diff --git a/drivers/target/iscsi/iscsi_target_configfs.c b/drivers/target/iscsi/iscsi_target_configfs.c
index fe35dcb..ae03f3e 100644
--- a/drivers/target/iscsi/iscsi_target_configfs.c
+++ b/drivers/target/iscsi/iscsi_target_configfs.c
@@ -1821,6 +1821,13 @@
iscsit_add_cmd_to_response_queue(cmd, cmd->conn, cmd->i_state);
}
+static void lio_aborted_task(struct se_cmd *se_cmd)
+{
+ struct iscsi_cmd *cmd = container_of(se_cmd, struct iscsi_cmd, se_cmd);
+
+ cmd->conn->conn_transport->iscsit_aborted_task(cmd->conn, cmd);
+}
+
static char *lio_tpg_get_endpoint_wwn(struct se_portal_group *se_tpg)
{
struct iscsi_portal_group *tpg = se_tpg->se_tpg_fabric_ptr;
@@ -2005,6 +2012,7 @@
fabric->tf_ops.queue_data_in = &lio_queue_data_in;
fabric->tf_ops.queue_status = &lio_queue_status;
fabric->tf_ops.queue_tm_rsp = &lio_queue_tm_rsp;
+ fabric->tf_ops.aborted_task = &lio_aborted_task;
/*
* Setup function pointers for generic logic in target_core_fabric_configfs.c
*/
diff --git a/drivers/target/iscsi/iscsi_target_util.c b/drivers/target/iscsi/iscsi_target_util.c
index e655b04..53e157c 100644
--- a/drivers/target/iscsi/iscsi_target_util.c
+++ b/drivers/target/iscsi/iscsi_target_util.c
@@ -705,8 +705,8 @@
}
EXPORT_SYMBOL(iscsit_release_cmd);
-static void __iscsit_free_cmd(struct iscsi_cmd *cmd, bool scsi_cmd,
- bool check_queues)
+void __iscsit_free_cmd(struct iscsi_cmd *cmd, bool scsi_cmd,
+ bool check_queues)
{
struct iscsi_conn *conn = cmd->conn;
diff --git a/drivers/target/iscsi/iscsi_target_util.h b/drivers/target/iscsi/iscsi_target_util.h
index 561a424..a68508c 100644
--- a/drivers/target/iscsi/iscsi_target_util.h
+++ b/drivers/target/iscsi/iscsi_target_util.h
@@ -30,6 +30,7 @@
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 *, bool, bool);
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 *);
diff --git a/drivers/target/loopback/tcm_loop.c b/drivers/target/loopback/tcm_loop.c
index a49ef0a..bdc1ad8 100644
--- a/drivers/target/loopback/tcm_loop.c
+++ b/drivers/target/loopback/tcm_loop.c
@@ -919,6 +919,11 @@
wake_up(&tl_tmr->tl_tmr_wait);
}
+static void tcm_loop_aborted_task(struct se_cmd *se_cmd)
+{
+ return;
+}
+
static char *tcm_loop_dump_proto_id(struct tcm_loop_hba *tl_hba)
{
switch (tl_hba->tl_proto_id) {
@@ -1487,6 +1492,7 @@
fabric->tf_ops.queue_data_in = &tcm_loop_queue_data_in;
fabric->tf_ops.queue_status = &tcm_loop_queue_status;
fabric->tf_ops.queue_tm_rsp = &tcm_loop_queue_tm_rsp;
+ fabric->tf_ops.aborted_task = &tcm_loop_aborted_task;
/*
* Setup function pointers for generic logic in target_core_fabric_configfs.c
diff --git a/drivers/target/sbp/sbp_target.c b/drivers/target/sbp/sbp_target.c
index 24884ca..ad04ea9 100644
--- a/drivers/target/sbp/sbp_target.c
+++ b/drivers/target/sbp/sbp_target.c
@@ -1846,6 +1846,11 @@
{
}
+static void sbp_aborted_task(struct se_cmd *se_cmd)
+{
+ return;
+}
+
static int sbp_check_stop_free(struct se_cmd *se_cmd)
{
struct sbp_target_request *req = container_of(se_cmd,
@@ -2526,6 +2531,7 @@
.queue_data_in = sbp_queue_data_in,
.queue_status = sbp_queue_status,
.queue_tm_rsp = sbp_queue_tm_rsp,
+ .aborted_task = sbp_aborted_task,
.check_stop_free = sbp_check_stop_free,
.fabric_make_wwn = sbp_make_tport,
diff --git a/drivers/target/target_core_configfs.c b/drivers/target/target_core_configfs.c
index f0e85b1..60a9ae6 100644
--- a/drivers/target/target_core_configfs.c
+++ b/drivers/target/target_core_configfs.c
@@ -457,6 +457,10 @@
pr_err("Missing tfo->queue_tm_rsp()\n");
return -EINVAL;
}
+ if (!tfo->aborted_task) {
+ pr_err("Missing tfo->aborted_task()\n");
+ return -EINVAL;
+ }
/*
* We at least require tfo->fabric_make_wwn(), tfo->fabric_drop_wwn()
* tfo->fabric_make_tpg() and tfo->fabric_drop_tpg() in
diff --git a/drivers/target/target_core_transport.c b/drivers/target/target_core_transport.c
index 51a3754..9393544 100644
--- a/drivers/target/target_core_transport.c
+++ b/drivers/target/target_core_transport.c
@@ -605,6 +605,12 @@
{
if (cmd->se_cmd_flags & SCF_SE_LUN_CMD)
transport_lun_remove_cmd(cmd);
+ /*
+ * Allow the fabric driver to unmap any resources before
+ * releasing the descriptor via TFO->release_cmd()
+ */
+ if (remove)
+ cmd->se_tfo->aborted_task(cmd);
if (transport_cmd_check_stop_to_fabric(cmd))
return;
diff --git a/drivers/target/tcm_fc/tcm_fc.h b/drivers/target/tcm_fc/tcm_fc.h
index 752863a..4f4b971 100644
--- a/drivers/target/tcm_fc/tcm_fc.h
+++ b/drivers/target/tcm_fc/tcm_fc.h
@@ -163,6 +163,7 @@
u32 ft_get_task_tag(struct se_cmd *);
int ft_get_cmd_state(struct se_cmd *);
void ft_queue_tm_resp(struct se_cmd *);
+void ft_aborted_task(struct se_cmd *);
/*
* other internal functions.
diff --git a/drivers/target/tcm_fc/tfc_cmd.c b/drivers/target/tcm_fc/tfc_cmd.c
index 8b2c1aa..01cf37f 100644
--- a/drivers/target/tcm_fc/tfc_cmd.c
+++ b/drivers/target/tcm_fc/tfc_cmd.c
@@ -426,6 +426,11 @@
ft_send_resp_code(cmd, code);
}
+void ft_aborted_task(struct se_cmd *se_cmd)
+{
+ return;
+}
+
static void ft_send_work(struct work_struct *work);
/*
diff --git a/drivers/target/tcm_fc/tfc_conf.c b/drivers/target/tcm_fc/tfc_conf.c
index e879da8..b8b5a71 100644
--- a/drivers/target/tcm_fc/tfc_conf.c
+++ b/drivers/target/tcm_fc/tfc_conf.c
@@ -536,6 +536,7 @@
.queue_data_in = ft_queue_data_in,
.queue_status = ft_queue_status,
.queue_tm_rsp = ft_queue_tm_resp,
+ .aborted_task = ft_aborted_task,
/*
* Setup function pointers for generic logic in
* target_core_fabric_configfs.c