diff options
| -rw-r--r-- | block/nbd.c | 15 |
1 files changed, 15 insertions, 0 deletions
diff --git a/block/nbd.c b/block/nbd.c index 813c40d8f0..fd78e5f330 100644 --- a/block/nbd.c +++ b/block/nbd.c @@ -1158,6 +1158,18 @@ static int coroutine_fn nbd_client_co_block_status( BDRV_BLOCK_OFFSET_VALID; } +static int nbd_client_reopen_prepare(BDRVReopenState *state, + BlockReopenQueue *queue, Error **errp) +{ + BDRVNBDState *s = (BDRVNBDState *)state->bs->opaque; + + if ((state->flags & BDRV_O_RDWR) && (s->info.flags & NBD_FLAG_READ_ONLY)) { + error_setg(errp, "Can't reopen read-only NBD mount as read/write"); + return -EACCES; + } + return 0; +} + static void nbd_client_close(BlockDriverState *bs) { BDRVNBDState *s = (BDRVNBDState *)bs->opaque; @@ -1798,6 +1810,7 @@ static BlockDriver bdrv_nbd = { .instance_size = sizeof(BDRVNBDState), .bdrv_parse_filename = nbd_parse_filename, .bdrv_file_open = nbd_open, + .bdrv_reopen_prepare = nbd_client_reopen_prepare, .bdrv_co_preadv = nbd_client_co_preadv, .bdrv_co_pwritev = nbd_client_co_pwritev, .bdrv_co_pwrite_zeroes = nbd_client_co_pwrite_zeroes, @@ -1820,6 +1833,7 @@ static BlockDriver bdrv_nbd_tcp = { .instance_size = sizeof(BDRVNBDState), .bdrv_parse_filename = nbd_parse_filename, .bdrv_file_open = nbd_open, + .bdrv_reopen_prepare = nbd_client_reopen_prepare, .bdrv_co_preadv = nbd_client_co_preadv, .bdrv_co_pwritev = nbd_client_co_pwritev, .bdrv_co_pwrite_zeroes = nbd_client_co_pwrite_zeroes, @@ -1842,6 +1856,7 @@ static BlockDriver bdrv_nbd_unix = { .instance_size = sizeof(BDRVNBDState), .bdrv_parse_filename = nbd_parse_filename, .bdrv_file_open = nbd_open, + .bdrv_reopen_prepare = nbd_client_reopen_prepare, .bdrv_co_preadv = nbd_client_co_preadv, .bdrv_co_pwritev = nbd_client_co_pwritev, .bdrv_co_pwrite_zeroes = nbd_client_co_pwrite_zeroes, |