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[Qemu-devel] [PULL 37/42] raw-posix: report unwritten extents as zero
From: |
Stefan Hajnoczi |
Subject: |
[Qemu-devel] [PULL 37/42] raw-posix: report unwritten extents as zero |
Date: |
Fri, 6 Sep 2013 17:39:08 +0200 |
From: Paolo Bonzini <address@hidden>
These are created for example with XFS_IOC_ZERO_RANGE.
Reviewed-by: Eric Blake <address@hidden>
Signed-off-by: Paolo Bonzini <address@hidden>
Signed-off-by: Stefan Hajnoczi <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
- Re: [Qemu-devel] [PULL 30/42] block: define get_block_status return value, (continued)
[Qemu-devel] [PULL 32/42] block: use bdrv_has_zero_init to return BDRV_BLOCK_ZERO, Stefan Hajnoczi, 2013/09/06
[Qemu-devel] [PULL 33/42] block: return BDRV_BLOCK_ZERO past end of backing file, Stefan Hajnoczi, 2013/09/06
[Qemu-devel] [PULL 34/42] qemu-img: add a "map" subcommand, Stefan Hajnoczi, 2013/09/06
[Qemu-devel] [PULL 35/42] docs, qapi: document qemu-img map, Stefan Hajnoczi, 2013/09/06
[Qemu-devel] [PULL 36/42] raw-posix: return get_block_status data and flags, Stefan Hajnoczi, 2013/09/06
[Qemu-devel] [PULL 37/42] raw-posix: report unwritten extents as zero,
Stefan Hajnoczi <=
[Qemu-devel] [PULL 38/42] block: add default get_block_status implementation for protocols, Stefan Hajnoczi, 2013/09/06
[Qemu-devel] [PULL 39/42] block: look for zero blocks in bs->file, Stefan Hajnoczi, 2013/09/06
- Re: [Qemu-devel] [PULL 39/42] block: look for zero blocks in bs->file, Peter Lieven, 2013/09/13
- Re: [Qemu-devel] [PULL 39/42] block: look for zero blocks in bs->file, Peter Lieven, 2013/09/13
- Re: [Qemu-devel] [PULL 39/42] block: look for zero blocks in bs->file, Paolo Bonzini, 2013/09/13
- Re: [Qemu-devel] [PULL 39/42] block: look for zero blocks in bs->file, Peter Lieven, 2013/09/13
- Re: [Qemu-devel] [PULL 39/42] block: look for zero blocks in bs->file, Paolo Bonzini, 2013/09/13
- Re: [Qemu-devel] [PULL 39/42] block: look for zero blocks in bs->file, Peter Lieven, 2013/09/13
[Qemu-devel] [PULL 40/42] dataplane: Fix startup race., Stefan Hajnoczi, 2013/09/06
[Qemu-devel] [PULL 41/42] qemu-iotests: Whitespace cleanup, Stefan Hajnoczi, 2013/09/06