diff options
| author | Kevin Wolf <kwolf@redhat.com> | 2017-11-07 18:21:41 +0100 |
|---|---|---|
| committer | Kevin Wolf <kwolf@redhat.com> | 2017-11-17 13:35:59 +0100 |
| commit | 398e6ad014df261d20d3fd6cff2cfbf940bac714 (patch) | |
| tree | 32ab30963ddfd86a2e4bb9199c393c6a466e00f3 /block/vvfat.c | |
| parent | f66afbe26f0c093d639610d70d16d7cc3183b652 (diff) | |
| download | qemu-398e6ad014df261d20d3fd6cff2cfbf940bac714.tar.gz | |
block: Deprecate bdrv_set_read_only() and users
bdrv_set_read_only() is used by some block drivers to override the
read-only option given by the user. This is not how read-only images
generally work in QEMU: Instead of second guessing what the user really
meant (which currently includes making an image read-only even if the
user didn't only use the default, but explicitly said read-only=off), we
should error out if we can't provide what the user requested.
This adds deprecation warnings to all callers of bdrv_set_read_only() so
that the behaviour can be corrected after the usual deprecation period.
Signed-off-by: Kevin Wolf <kwolf@redhat.com>
Diffstat (limited to 'block/vvfat.c')
| -rw-r--r-- | block/vvfat.c | 6 |
1 files changed, 5 insertions, 1 deletions
diff --git a/block/vvfat.c b/block/vvfat.c index a0f2335894..0841cc42fc 100644 --- a/block/vvfat.c +++ b/block/vvfat.c @@ -1259,7 +1259,11 @@ static int vvfat_open(BlockDriverState *bs, QDict *options, int flags, "Unable to set VVFAT to 'rw' when drive is read-only"); goto fail; } - } else { + } else if (!bdrv_is_read_only(bs)) { + error_report("Opening non-rw vvfat images without an explicit " + "read-only=on option is deprecated. Future versions " + "will refuse to open the image instead of " + "automatically marking the image read-only."); /* read only is the default for safety */ ret = bdrv_set_read_only(bs, true, &local_err); if (ret < 0) { |