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[Qemu-devel] [PATCH v5 19/21] raw-posix: report unwritten extents as zer
From: |
Paolo Bonzini |
Subject: |
[Qemu-devel] [PATCH v5 19/21] raw-posix: report unwritten extents as zero |
Date: |
Wed, 4 Sep 2013 19:00:36 +0200 |
These are created for example with XFS_IOC_ZERO_RANGE.
Reviewed-by: Eric Blake <address@hidden>
Signed-off-by: Paolo Bonzini <address@hidden>
---
block/raw-posix.c | 3 +++
1 file changed, 3 insertions(+)
diff --git a/block/raw-posix.c b/block/raw-posix.c
index d011cfd..1b41ea3 100644
--- a/block/raw-posix.c
+++ b/block/raw-posix.c
@@ -1128,6 +1128,9 @@ static int64_t coroutine_fn
raw_co_get_block_status(BlockDriverState *bs,
} else {
data = f.fe.fe_logical;
hole = f.fe.fe_logical + f.fe.fe_length;
+ if (f.fe.fe_flags & FIEMAP_EXTENT_UNWRITTEN) {
+ ret |= BDRV_BLOCK_ZERO;
+ }
}
#elif defined SEEK_HOLE && defined SEEK_DATA
--
1.8.3.1
- [Qemu-devel] [PATCH v5 10/21] block: make bdrv_has_zero_init return false for copy-on-write-images, (continued)
- [Qemu-devel] [PATCH v5 10/21] block: make bdrv_has_zero_init return false for copy-on-write-images, Paolo Bonzini, 2013/09/04
- [Qemu-devel] [PATCH v5 11/21] block: introduce bdrv_get_block_status API, Paolo Bonzini, 2013/09/04
- [Qemu-devel] [PATCH v5 12/21] block: define get_block_status return value, Paolo Bonzini, 2013/09/04
- [Qemu-devel] [PATCH v5 13/21] block: return get_block_status data and flags for formats, Paolo Bonzini, 2013/09/04
- [Qemu-devel] [PATCH v5 09/21] qemu-img: always probe the input image for allocated sectors, Paolo Bonzini, 2013/09/04
- [Qemu-devel] [PATCH v5 14/21] block: use bdrv_has_zero_init to return BDRV_BLOCK_ZERO, Paolo Bonzini, 2013/09/04
- [Qemu-devel] [PATCH v5 16/21] qemu-img: add a "map" subcommand, Paolo Bonzini, 2013/09/04
- [Qemu-devel] [PATCH v5 15/21] block: return BDRV_BLOCK_ZERO past end of backing file, Paolo Bonzini, 2013/09/04
- [Qemu-devel] [PATCH v5 17/21] docs, qapi: document qemu-img map, Paolo Bonzini, 2013/09/04
- [Qemu-devel] [PATCH v5 18/21] raw-posix: return get_block_status data and flags, Paolo Bonzini, 2013/09/04
- [Qemu-devel] [PATCH v5 19/21] raw-posix: report unwritten extents as zero,
Paolo Bonzini <=
- [Qemu-devel] [PATCH v5 20/21] block: add default get_block_status implementation for protocols, Paolo Bonzini, 2013/09/04
- [Qemu-devel] [PATCH v5 21/21] block: look for zero blocks in bs->file, Paolo Bonzini, 2013/09/04
- Re: [Qemu-devel] [PATCH v5 00/21] Add qemu-img subcommand to dump file metadata, Stefan Hajnoczi, 2013/09/05