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[Qemu-block] [PATCH v3 09/10] block: Fix bdrv_co_truncate overlap check
From: |
Fam Zheng |
Subject: |
[Qemu-block] [PATCH v3 09/10] block: Fix bdrv_co_truncate overlap check |
Date: |
Tue, 10 Jul 2018 14:31:23 +0800 |
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 address@hidden, @offset), not
address@hidden, offset * 2 - @old_size).
Signed-off-by: Fam Zheng <address@hidden>
Reviewed-by: Eric Blake <address@hidden>
---
block/io.c | 3 ++-
1 file changed, 2 insertions(+), 1 deletion(-)
diff --git a/block/io.c b/block/io.c
index 9687da1ce9..e3e2d5286d 100644
--- a/block/io.c
+++ b/block/io.c
@@ -3113,7 +3113,8 @@ 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
--
2.17.1
- [Qemu-block] [PATCH v3 00/10] block: Fix dst reading after tail copy offloading, Fam Zheng, 2018/07/10
- [Qemu-block] [PATCH v3 01/10] block: Prefix file driver trace points with "file_", Fam Zheng, 2018/07/10
- [Qemu-block] [PATCH v3 02/10] block: Add copy offloading trace points, Fam Zheng, 2018/07/10
- [Qemu-block] [PATCH v3 03/10] block: Use BdrvChild to discard, Fam Zheng, 2018/07/10
- [Qemu-block] [PATCH v3 04/10] block: Use uint64_t for BdrvTrackedRequest byte fields, Fam Zheng, 2018/07/10
- [Qemu-block] [PATCH v3 05/10] block: Extract common write req handling, Fam Zheng, 2018/07/10
- [Qemu-block] [PATCH v3 06/10] block: Fix handling of image enlarging write, Fam Zheng, 2018/07/10
- [Qemu-block] [PATCH v3 07/10] block: Use common req handling for discard, Fam Zheng, 2018/07/10
- [Qemu-block] [PATCH v3 08/10] block: Use common req handling in copy offloading, Fam Zheng, 2018/07/10
- [Qemu-block] [PATCH v3 09/10] block: Fix bdrv_co_truncate overlap check,
Fam Zheng <=
- [Qemu-block] [PATCH v3 10/10] block: Use common write req handling in truncate, Fam Zheng, 2018/07/10
- Re: [Qemu-block] [PATCH v3 00/10] block: Fix dst reading after tail copy offloading, Kevin Wolf, 2018/07/10