diff options
| author | Mike Christie <michael.christie@oracle.com> | 2022-06-16 17:45:50 -0500 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2022-10-26 12:35:15 +0200 |
| commit | c2af03a7c1b5f3cfa091718ce4f6cc572c112fff (patch) | |
| tree | 6caddaa513182bfb5fe270b98e42f02f1dca1d6a /drivers/scsi | |
| parent | d6aafc21bef1b0221a6b5707488db2cd2e687241 (diff) | |
scsi: iscsi: Add recv workqueue helpers
[ Upstream commit 8af809966c0b34cfacd8da9a412689b8e9910354 ]
Add helpers to allow the drivers to run their recv paths from libiscsi's
workqueue.
Link: https://lore.kernel.org/r/20220616224557.115234-3-michael.christie@oracle.com
Reviewed-by: Lee Duncan <lduncan@suse.com>
Signed-off-by: Mike Christie <michael.christie@oracle.com>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
Stable-dep-of: 57569c37f0ad ("scsi: iscsi: iscsi_tcp: Fix null-ptr-deref while calling getpeername()")
Signed-off-by: Sasha Levin <sashal@kernel.org>
Diffstat (limited to 'drivers/scsi')
| -rw-r--r-- | drivers/scsi/libiscsi.c | 29 |
1 files changed, 27 insertions, 2 deletions
diff --git a/drivers/scsi/libiscsi.c b/drivers/scsi/libiscsi.c index 1cb18b80d182..73d235540b98 100644 --- a/drivers/scsi/libiscsi.c +++ b/drivers/scsi/libiscsi.c @@ -93,6 +93,16 @@ inline void iscsi_conn_queue_xmit(struct iscsi_conn *conn) } EXPORT_SYMBOL_GPL(iscsi_conn_queue_xmit); +inline void iscsi_conn_queue_recv(struct iscsi_conn *conn) +{ + struct Scsi_Host *shost = conn->session->host; + struct iscsi_host *ihost = shost_priv(shost); + + if (ihost->workq && !test_bit(ISCSI_CONN_FLAG_SUSPEND_RX, &conn->flags)) + queue_work(ihost->workq, &conn->recvwork); +} +EXPORT_SYMBOL_GPL(iscsi_conn_queue_recv); + static void __iscsi_update_cmdsn(struct iscsi_session *session, uint32_t exp_cmdsn, uint32_t max_cmdsn) { @@ -1943,7 +1953,7 @@ EXPORT_SYMBOL_GPL(iscsi_suspend_queue); /** * iscsi_suspend_tx - suspend iscsi_data_xmit - * @conn: iscsi conn tp stop processing IO on. + * @conn: iscsi conn to stop processing IO on. * * This function sets the suspend bit to prevent iscsi_data_xmit * from sending new IO, and if work is queued on the xmit thread @@ -1956,7 +1966,7 @@ void iscsi_suspend_tx(struct iscsi_conn *conn) set_bit(ISCSI_CONN_FLAG_SUSPEND_TX, &conn->flags); if (ihost->workq) - flush_workqueue(ihost->workq); + flush_work(&conn->xmitwork); } EXPORT_SYMBOL_GPL(iscsi_suspend_tx); @@ -1966,6 +1976,21 @@ static void iscsi_start_tx(struct iscsi_conn *conn) iscsi_conn_queue_xmit(conn); } +/** + * iscsi_suspend_rx - Prevent recvwork from running again. + * @conn: iscsi conn to stop. + */ +void iscsi_suspend_rx(struct iscsi_conn *conn) +{ + struct Scsi_Host *shost = conn->session->host; + struct iscsi_host *ihost = shost_priv(shost); + + set_bit(ISCSI_CONN_FLAG_SUSPEND_RX, &conn->flags); + if (ihost->workq) + flush_work(&conn->recvwork); +} +EXPORT_SYMBOL_GPL(iscsi_suspend_rx); + /* * We want to make sure a ping is in flight. It has timed out. * And we are not busy processing a pdu that is making |