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lib/iscsi: Simplify iscsi_conn_free_tasks()

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iscsi_conn_free_task() is used only when exiting connection now.
Hence we can remove the parameter lun and simplify the function
and its unit tests.

Signed-off-by: Shuhei Matsumoto <shuhei.matsumoto.xt@hitachi.com>
Change-Id: I6e7bf09672edca1f70c042ac58f098114d71ec78
Reviewed-on: https://review.gerrithub.io/c/spdk/spdk/+/476115
Tested-by: SPDK CI Jenkins <sys_sgci@intel.com>
Reviewed-by: Changpeng Liu <changpeng.liu@intel.com>
Reviewed-by: Jim Harris <james.r.harris@intel.com>
Reviewed-by: Ziye Yang <ziye.yang@intel.com>
This commit is contained in:
Shuhei Matsumoto 2019-11-28 12:54:06 -05:00 committed by Tomasz Zawadzki
parent 27d79ee367
commit b24bd0390a
2 changed files with 11 additions and 80 deletions
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30
lib/iscsi/conn.c
View File

@ -311,21 +311,19 @@ spdk_iscsi_conn_free_pdu(struct spdk_iscsi_conn *conn, struct spdk_iscsi_pdu *pd
spdk_put_pdu(pdu);
}
static void
_iscsi_conn_free_tasks(struct spdk_iscsi_conn *conn, struct spdk_scsi_lun *lun)
static int
iscsi_conn_free_tasks(struct spdk_iscsi_conn *conn)
{
struct spdk_iscsi_pdu *pdu, *tmp_pdu;
struct spdk_iscsi_task *iscsi_task, *tmp_iscsi_task;
TAILQ_FOREACH_SAFE(pdu, &conn->snack_pdu_list, tailq, tmp_pdu) {
if (lun == NULL || lun == pdu->task->scsi.lun) {
TAILQ_REMOVE(&conn->snack_pdu_list, pdu, tailq);
spdk_iscsi_conn_free_pdu(conn, pdu);
}
TAILQ_REMOVE(&conn->snack_pdu_list, pdu, tailq);
spdk_iscsi_conn_free_pdu(conn, pdu);
}
TAILQ_FOREACH_SAFE(iscsi_task, &conn->queued_datain_tasks, link, tmp_iscsi_task) {
if ((!iscsi_task->is_queued) && (lun == NULL || lun == iscsi_task->scsi.lun)) {
if (!iscsi_task->is_queued) {
TAILQ_REMOVE(&conn->queued_datain_tasks, iscsi_task, link);
spdk_iscsi_task_put(iscsi_task);
}
@ -338,23 +336,9 @@ _iscsi_conn_free_tasks(struct spdk_iscsi_conn *conn, struct spdk_scsi_lun *lun)
* have to ensure there is no associated task in conn->queued_datain_tasks.
*/
TAILQ_FOREACH_SAFE(pdu, &conn->write_pdu_list, tailq, tmp_pdu) {
/* If connection is exited (no LUN is specified) or the PDU's LUN matches
* the LUN that was removed, free this PDU immediately. If the pdu's LUN
* is NULL, then we know the datain handling code already detected the hot
* removal, so we can free that PDU as well.
*/
if ((lun == NULL) ||
(pdu->task && (lun == pdu->task->scsi.lun || NULL == pdu->task->scsi.lun))) {
TAILQ_REMOVE(&conn->write_pdu_list, pdu, tailq);
spdk_iscsi_conn_free_pdu(conn, pdu);
}
TAILQ_REMOVE(&conn->write_pdu_list, pdu, tailq);
spdk_iscsi_conn_free_pdu(conn, pdu);
}
}
static int
iscsi_conn_free_tasks(struct spdk_iscsi_conn *conn)
{
_iscsi_conn_free_tasks(conn, NULL);
if (conn->pending_task_cnt) {
return -1;

61
test/unit/lib/iscsi/conn.c/conn_ut.c
View File

@ -589,32 +589,13 @@ free_tasks_on_connection(void)
TAILQ_INSERT_TAIL(&conn.write_pdu_list, &pdu4, tailq);
/* Free all PDUs when exiting connection. */
_iscsi_conn_free_tasks(&conn, NULL);
iscsi_conn_free_tasks(&conn);
CU_ASSERT(TAILQ_EMPTY(&conn.write_pdu_list));
CU_ASSERT(task1.scsi.ref == 0);
CU_ASSERT(task2.scsi.ref == 0);
CU_ASSERT(task3.scsi.ref == 0);
task1.scsi.ref = 1;
task2.scsi.ref = 1;
task3.scsi.ref = 1;
TAILQ_INSERT_TAIL(&conn.write_pdu_list, &pdu1, tailq);
TAILQ_INSERT_TAIL(&conn.write_pdu_list, &pdu2, tailq);
TAILQ_INSERT_TAIL(&conn.write_pdu_list, &pdu3, tailq);
TAILQ_INSERT_TAIL(&conn.write_pdu_list, &pdu4, tailq);
/* Free PDUs whose LUN matches the passed LUN or is NULL. */
_iscsi_conn_free_tasks(&conn, &lun1);
CU_ASSERT(!dequeue_pdu(&conn.write_pdu_list, &pdu1));
CU_ASSERT(dequeue_pdu(&conn.write_pdu_list, &pdu2));
CU_ASSERT(!dequeue_pdu(&conn.write_pdu_list, &pdu3));
CU_ASSERT(dequeue_pdu(&conn.write_pdu_list, &pdu4));
CU_ASSERT(task1.scsi.ref == 0);
CU_ASSERT(task2.scsi.ref == 1);
CU_ASSERT(task3.scsi.ref == 0);
/* Test conn->snack_pdu_list */
task1.scsi.ref = 1;
@ -625,7 +606,7 @@ free_tasks_on_connection(void)
TAILQ_INSERT_TAIL(&conn.snack_pdu_list, &pdu3, tailq);
/* Free all PDUs and associated tasks when exiting connection. */
_iscsi_conn_free_tasks(&conn, NULL);
iscsi_conn_free_tasks(&conn);
CU_ASSERT(!dequeue_pdu(&conn.snack_pdu_list, &pdu1));
CU_ASSERT(!dequeue_pdu(&conn.snack_pdu_list, &pdu2));
@ -634,23 +615,6 @@ free_tasks_on_connection(void)
CU_ASSERT(task2.scsi.ref == 0);
CU_ASSERT(task3.scsi.ref == 0);
task1.scsi.ref = 1;
task2.scsi.ref = 1;
task3.scsi.ref = 1;
TAILQ_INSERT_TAIL(&conn.snack_pdu_list, &pdu1, tailq);
TAILQ_INSERT_TAIL(&conn.snack_pdu_list, &pdu2, tailq);
TAILQ_INSERT_TAIL(&conn.snack_pdu_list, &pdu3, tailq);
/* Free all PDUs and free associated tasks whose lun matches the passed LUN. */
_iscsi_conn_free_tasks(&conn, &lun1);
CU_ASSERT(!dequeue_pdu(&conn.snack_pdu_list, &pdu1));
CU_ASSERT(dequeue_pdu(&conn.snack_pdu_list, &pdu2));
CU_ASSERT(dequeue_pdu(&conn.snack_pdu_list, &pdu3));
CU_ASSERT(task1.scsi.ref == 0);
CU_ASSERT(task2.scsi.ref == 1);
CU_ASSERT(task3.scsi.ref == 1);
/* Test conn->queued_datain_tasks */
task1.scsi.ref = 1;
@ -661,7 +625,7 @@ free_tasks_on_connection(void)
TAILQ_INSERT_TAIL(&conn.queued_datain_tasks, &task3, link);
/* Free all tasks which is not queued when exiting connection. */
_iscsi_conn_free_tasks(&conn, NULL);
iscsi_conn_free_tasks(&conn);
CU_ASSERT(!dequeue_task(&conn.queued_datain_tasks, &task1));
CU_ASSERT(!dequeue_task(&conn.queued_datain_tasks, &task2));
@ -669,23 +633,6 @@ free_tasks_on_connection(void)
CU_ASSERT(task1.scsi.ref == 0);
CU_ASSERT(task2.scsi.ref == 0);
CU_ASSERT(task3.scsi.ref == 1);
task1.scsi.ref = 1;
task2.scsi.ref = 1;
task3.scsi.ref = 1;
TAILQ_INSERT_TAIL(&conn.queued_datain_tasks, &task1, link);
TAILQ_INSERT_TAIL(&conn.queued_datain_tasks, &task2, link);
TAILQ_INSERT_TAIL(&conn.queued_datain_tasks, &task3, link);
/* Free all tasks which is not queued and.whose LUN matches the passed LUN. */
_iscsi_conn_free_tasks(&conn, &lun1);
CU_ASSERT(!dequeue_task(&conn.queued_datain_tasks, &task1));
CU_ASSERT(dequeue_task(&conn.queued_datain_tasks, &task2));
CU_ASSERT(dequeue_task(&conn.queued_datain_tasks, &task3));
CU_ASSERT(task1.scsi.ref == 0);
CU_ASSERT(task2.scsi.ref == 1);
CU_ASSERT(task3.scsi.ref == 1);
}
static void
@ -727,7 +674,7 @@ free_tasks_with_queued_datain(void)
TAILQ_INSERT_TAIL(&conn.queued_datain_tasks, &task5, link);
TAILQ_INSERT_TAIL(&conn.queued_datain_tasks, &task6, link);
_iscsi_conn_free_tasks(&conn, NULL);
iscsi_conn_free_tasks(&conn);
CU_ASSERT(TAILQ_EMPTY(&conn.write_pdu_list));
CU_ASSERT(TAILQ_EMPTY(&conn.queued_datain_tasks));