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authorMike Christie <michael.christie@oracle.com>2022-06-17 01:45:50 +0300
committerMartin K. Petersen <martin.petersen@oracle.com>2022-06-22 04:19:22 +0300
commit8af809966c0b34cfacd8da9a412689b8e9910354 (patch)
tree9c79a94cda22f8e1805783da1e4d98f198621c0e /drivers/scsi/libiscsi.c
parent4b9f8ce4d5e823e42944c5a0a4842b0f936365ad (diff)
downloadlinux-8af809966c0b34cfacd8da9a412689b8e9910354.tar.xz
scsi: iscsi: Add recv workqueue helpers
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>
Diffstat (limited to 'drivers/scsi/libiscsi.c')
-rw-r--r--drivers/scsi/libiscsi.c29
1 files changed, 27 insertions, 2 deletions
diff --git a/drivers/scsi/libiscsi.c b/drivers/scsi/libiscsi.c
index a6859805d530..20156fb33646 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)
{
@@ -1947,7 +1957,7 @@ 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
@@ -1960,7 +1970,7 @@ 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);
@@ -1970,6 +1980,21 @@ 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