From: Jeff Cody <jc...@redhat.com>
iSCSI currently does not need to do any actions to support the
current usage of bdrv_reopen(). However, it is important to note
a couple of things: 1.) A connection will not be re-established to
an iSCSI target, and 2.) If iscsi_open() is changed to parse 'flags',
then iscsi_reopen_prepare() may need to be more than a stub.
In light of the above, this commit adds comments above both of the
functions to bring attention to these facts.
Signed-off-by: Jeff Cody <jc...@redhat.com>
Signed-off-by: Stefan Hajnoczi <stefa...@redhat.com>
---
block/iscsi.c | 10 ++++++++--
1 file changed, 8 insertions(+), 2 deletions(-)
diff --git a/block/iscsi.c b/block/iscsi.c
index 8d0f966..c97c040 100644
--- a/block/iscsi.c
+++ b/block/iscsi.c
@@ -1099,6 +1099,10 @@ fail:
/*
* We support iscsi url's on the form
* iscsi://[<username>%<password>@]<host>[:<port>]/<targetname>/<lun>
+ *
+ * Note: flags are currently not used by iscsi_open. If this function
+ * is changed such that flags are used, please examine iscsi_reopen_prepare()
+ * to see if needs to be changed as well.
*/
static int iscsi_open(BlockDriverState *bs, QDict *options, int flags,
Error **errp)
@@ -1336,11 +1340,13 @@ static int iscsi_refresh_limits(BlockDriverState *bs)
return 0;
}
-/* We have nothing to do for iSCSI reopen, stub just returns
- * success */
+/* Since iscsi_open() ignores bdrv_flags, there is nothing to do here in
+ * prepare. Note that this will not re-establish a connection with an iSCSI
+ * target - it is effectively a NOP. */
static int iscsi_reopen_prepare(BDRVReopenState *state,
BlockReopenQueue *queue, Error **errp)
{
+ /* NOP */
return 0;
}
--
1.8.5.3
