diff options
| author | Alberto Garcia <berto@igalia.com> | 2016-09-15 17:53:02 +0300 |
|---|---|---|
| committer | Kevin Wolf <kwolf@redhat.com> | 2016-09-23 13:36:10 +0200 |
| commit | f87a0e29a9814a7ab6ee92b238989fed6186c4f3 (patch) | |
| tree | 7c1ffdb94b7d3680c9d2117262b0bfecba174f05 /block/vvfat.c | |
| parent | 9b7e8691670fab57c387b6955dc14a09696ae034 (diff) | |
| download | qemu-f87a0e29a9814a7ab6ee92b238989fed6186c4f3.tar.gz | |
block: Add "read-only" to the options QDict
This adds the "read-only" option to the QDict. One important effect of
this change is that when a child inherits options from its parent, the
existing "read-only" mode can be preserved if it was explicitly set
previously.
This addresses scenarios like this:
[E] <- [D] <- [C] <- [B] <- [A]
In this case, if we reopen [D] with read-only=off, and later reopen
[B], then [D] will not inherit read-only=on from its parent during the
bdrv_reopen_queue_child() stage.
The BDRV_O_RDWR flag is not removed yet, but its keep in sync with the
value of the "read-only" option.
Signed-off-by: Alberto Garcia <berto@igalia.com>
Signed-off-by: Kevin Wolf <kwolf@redhat.com>
Diffstat (limited to 'block/vvfat.c')
| -rw-r--r-- | block/vvfat.c | 3 |
1 files changed, 2 insertions, 1 deletions
diff --git a/block/vvfat.c b/block/vvfat.c index ba2620f3c2..ded21092ee 100644 --- a/block/vvfat.c +++ b/block/vvfat.c @@ -2971,7 +2971,8 @@ static BlockDriver vvfat_write_target = { static void vvfat_qcow_options(int *child_flags, QDict *child_options, int parent_flags, QDict *parent_options) { - *child_flags = BDRV_O_RDWR | BDRV_O_NO_FLUSH; + qdict_set_default_str(child_options, BDRV_OPT_READ_ONLY, "off"); + *child_flags = BDRV_O_NO_FLUSH; } static const BdrvChildRole child_vvfat_qcow = { |