diff options
Diffstat (limited to 'block/block-backend.c')
| -rw-r--r-- | block/block-backend.c | 10 |
1 files changed, 6 insertions, 4 deletions
diff --git a/block/block-backend.c b/block/block-backend.c index 5836cb3087..baef8e7abc 100644 --- a/block/block-backend.c +++ b/block/block-backend.c @@ -299,7 +299,7 @@ BlockBackend *blk_new_open(const char *filename, const char *reference, { BlockBackend *blk; BlockDriverState *bs; - uint64_t perm; + uint64_t perm = 0; /* blk_new_open() is mainly used in .bdrv_create implementations and the * tools where sharing isn't a concern because the BDS stays private, so we @@ -309,9 +309,11 @@ BlockBackend *blk_new_open(const char *filename, const char *reference, * caller of blk_new_open() doesn't make use of the permissions, but they * shouldn't hurt either. We can still share everything here because the * guest devices will add their own blockers if they can't share. */ - perm = BLK_PERM_CONSISTENT_READ; - if (flags & BDRV_O_RDWR) { - perm |= BLK_PERM_WRITE; + if ((flags & BDRV_O_NO_IO) == 0) { + perm |= BLK_PERM_CONSISTENT_READ; + if (flags & BDRV_O_RDWR) { + perm |= BLK_PERM_WRITE; + } } if (flags & BDRV_O_RESIZE) { perm |= BLK_PERM_RESIZE; |