diff options
Diffstat (limited to 'block/vvfat.c')
| -rw-r--r-- | block/vvfat.c | 19 |
1 files changed, 15 insertions, 4 deletions
diff --git a/block/vvfat.c b/block/vvfat.c index d4ce6d7092..b509d55642 100644 --- a/block/vvfat.c +++ b/block/vvfat.c @@ -1156,8 +1156,6 @@ static int vvfat_open(BlockDriverState *bs, QDict *options, int flags, s->current_cluster=0xffffffff; - /* read only is the default for safety */ - bdrv_set_read_only(bs, true); s->qcow = NULL; s->qcow_filename = NULL; s->fat2 = NULL; @@ -1169,11 +1167,24 @@ static int vvfat_open(BlockDriverState *bs, QDict *options, int flags, s->sector_count = cyls * heads * secs - (s->first_sectors_number - 1); if (qemu_opt_get_bool(opts, "rw", false)) { - ret = enable_write_target(bs, errp); + if (!bdrv_is_read_only(bs)) { + ret = enable_write_target(bs, errp); + if (ret < 0) { + goto fail; + } + } else { + ret = -EPERM; + error_setg(errp, + "Unable to set VVFAT to 'rw' when drive is read-only"); + goto fail; + } + } else { + /* read only is the default for safety */ + ret = bdrv_set_read_only(bs, true, &local_err); if (ret < 0) { + error_propagate(errp, local_err); goto fail; } - bdrv_set_read_only(bs, false); } bs->total_sectors = cyls * heads * secs; |