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| author | Vladimir Sementsov-Ogievskiy <vsementsov@virtuozzo.com> | 2017-06-28 15:05:10 +0300 |
|---|---|---|
| committer | Max Reitz <mreitz@redhat.com> | 2017-07-11 17:44:58 +0200 |
| commit | d6883bc96890dae97757ee8a61aab7f18d9a66de (patch) | |
| tree | 615468c1c9098a4062e888df16f9f4fbebaa3a30 /block/io.c | |
| parent | 8bfc932e1eaab86788bb08207d520bd2804422ae (diff) | |
| download | qemu-d6883bc96890dae97757ee8a61aab7f18d9a66de.tar.gz | |
block/dirty-bitmap: add readonly field to BdrvDirtyBitmap
It will be needed in following commits for persistent bitmaps.
If bitmap is loaded from read-only storage (and we can't mark it
"in use" in this storage) corresponding BdrvDirtyBitmap should be
read-only.
Signed-off-by: Vladimir Sementsov-Ogievskiy <vsementsov@virtuozzo.com>
Message-id: 20170628120530.31251-11-vsementsov@virtuozzo.com
Signed-off-by: Max Reitz <mreitz@redhat.com>
Diffstat (limited to 'block/io.c')
| -rw-r--r-- | block/io.c | 8 |
1 files changed, 8 insertions, 0 deletions
diff --git a/block/io.c b/block/io.c index 23170a57ee..b413727524 100644 --- a/block/io.c +++ b/block/io.c @@ -1315,6 +1315,10 @@ static int coroutine_fn bdrv_aligned_pwritev(BdrvChild *child, uint64_t bytes_remaining = bytes; int max_transfer; + if (bdrv_has_readonly_bitmaps(bs)) { + return -EPERM; + } + assert(is_power_of_2(align)); assert((offset & (align - 1)) == 0); assert((bytes & (align - 1)) == 0); @@ -2287,6 +2291,10 @@ int coroutine_fn bdrv_co_pdiscard(BlockDriverState *bs, int64_t offset, return -ENOMEDIUM; } + if (bdrv_has_readonly_bitmaps(bs)) { + return -EPERM; + } + ret = bdrv_check_byte_request(bs, offset, bytes); if (ret < 0) { return ret; |