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| author | Jeff Cody | 2014-02-04 20:12:44 +0100 |
|---|---|---|
| committer | Stefan Hajnoczi | 2014-02-14 13:38:35 +0100 |
| commit | 28f106afb35a86aa01e1907ef7632e015fabce02 (patch) | |
| tree | 13ea4f9bc744c6f078889fc34ff42c888afc9740 /block/iscsi.c | |
| parent | blockdev: Remove 'type' parameter from blockdev_init() (diff) | |
| download | qemu-28f106afb35a86aa01e1907ef7632e015fabce02.tar.gz qemu-28f106afb35a86aa01e1907ef7632e015fabce02.tar.xz qemu-28f106afb35a86aa01e1907ef7632e015fabce02.zip | |
block: Add notes to iSCSI's .bdrv_open and .bdrv_reopen_prepare
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 <jcody@redhat.com>
Signed-off-by: Stefan Hajnoczi <stefanha@redhat.com>
Diffstat (limited to 'block/iscsi.c')
| -rw-r--r-- | block/iscsi.c | 10 |
1 files changed, 8 insertions, 2 deletions
diff --git a/block/iscsi.c b/block/iscsi.c index 8d0f9667c5..c97c04060d 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; } |