ShuriZma
/
xemu
mirror of https://github.com/xemu-project/xemu.git
1
0
Fork 0
Code Issues Packages Projects Releases Wiki Activity

block: Fix bdrv_co_truncate overlap check 

If we are growing the image and potentially using preallocation for the
new area, we need to make sure that no write requests are made to the
"preallocated" area which is [@old_size, @offset), not
[@offset, offset * 2 - @old_size).

Signed-off-by: Fam Zheng <famz@redhat.com>
Reviewed-by: Eric Blake <eblake@redhat.com>
Signed-off-by: Kevin Wolf <kwolf@redhat.com>
This commit is contained in:
Fam Zheng 2018-07-10 14:31:23 +08:00 committed by Kevin Wolf
parent 0eb1e89112
commit 5416a11eb5
1 changed files with 2 additions and 1 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

3
block/io.c
View File

@ -3136,7 +3136,8 @@ int coroutine_fn bdrv_co_truncate(BdrvChild *child, int64_t offset,
}
bdrv_inc_in_flight(bs);
tracked_request_begin(&req, bs, offset, new_bytes, BDRV_TRACKED_TRUNCATE);
tracked_request_begin(&req, bs, offset - new_bytes, new_bytes,
BDRV_TRACKED_TRUNCATE);
/* If we are growing the image and potentially using preallocation for the
* new area, we need to make sure that no write requests are made to it