diff options
| -rw-r--r-- | block/rbd.c | 21 |
1 files changed, 21 insertions, 0 deletions
diff --git a/block/rbd.c b/block/rbd.c index 35853c9..6471f4f 100644 --- a/block/rbd.c +++ b/block/rbd.c @@ -668,6 +668,26 @@ failed_opts: return r; } + +/* Since RBD is currently always opened R/W via the API, + * we just need to check if we are using a snapshot or not, in + * order to determine if we will allow it to be R/W */ +static int qemu_rbd_reopen_prepare(BDRVReopenState *state, + BlockReopenQueue *queue, Error **errp) +{ + BDRVRBDState *s = state->bs->opaque; + int ret = 0; + + if (s->snap && state->flags & BDRV_O_RDWR) { + error_setg(errp, + "Cannot change node '%s' to r/w when using RBD snapshot", + bdrv_get_device_or_node_name(state->bs)); + ret = -EINVAL; + } + + return ret; +} + static void qemu_rbd_close(BlockDriverState *bs) { BDRVRBDState *s = bs->opaque; @@ -1074,6 +1094,7 @@ static BlockDriver bdrv_rbd = { .bdrv_parse_filename = qemu_rbd_parse_filename, .bdrv_file_open = qemu_rbd_open, .bdrv_close = qemu_rbd_close, + .bdrv_reopen_prepare = qemu_rbd_reopen_prepare, .bdrv_create = qemu_rbd_create, .bdrv_has_zero_init = bdrv_has_zero_init_1, .bdrv_get_info = qemu_rbd_getinfo, |