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block: Assert no write requests under BDRV_O_INCOMING

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As long as BDRV_O_INCOMING is set, the image file is only opened so we
have a file descriptor for it. We're definitely not supposed to modify
the image, it's still owned by the migration source.

Signed-off-by: Kevin Wolf <kwolf@redhat.com>
Reviewed-by: Eric Blake <eblake@redhat.com>
This commit is contained in:
Kevin Wolf 2015-12-16 14:00:36 +01:00
parent b527c9b392
commit 09e0c771e4
1 changed files with 2 additions and 0 deletions
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2
block/io.c
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@ -1301,6 +1301,7 @@ static int coroutine_fn bdrv_co_do_pwritev(BlockDriverState *bs,
if (bs->read_only) { if (bs->read_only) {
return -EPERM; return -EPERM;
} }
assert(!(bs->open_flags & BDRV_O_INCOMING));
ret = bdrv_check_byte_request(bs, offset, bytes); ret = bdrv_check_byte_request(bs, offset, bytes);
if (ret < 0) { if (ret < 0) {
@ -2462,6 +2463,7 @@ int coroutine_fn bdrv_co_discard(BlockDriverState *bs, int64_t sector_num,
} else if (bs->read_only) { } else if (bs->read_only) {
return -EPERM; return -EPERM;
} }
assert(!(bs->open_flags & BDRV_O_INCOMING));
/* Do nothing if disabled. */ /* Do nothing if disabled. */
if (!(bs->open_flags & BDRV_O_UNMAP)) { if (!(bs->open_flags & BDRV_O_UNMAP)) {