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Re: [Qemu-devel] [PATCH v4 15/21] block: return BDRV_BLOCK_ZERO past end
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From: |
Eric Blake |
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Subject: |
Re: [Qemu-devel] [PATCH v4 15/21] block: return BDRV_BLOCK_ZERO past end of backing file |
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Date: |
Thu, 29 Aug 2013 15:59:37 -0600 |
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User-agent: |
Mozilla/5.0 (X11; Linux x86_64; rv:17.0) Gecko/20130805 Thunderbird/17.0.8 |
On 08/29/2013 08:00 AM, Paolo Bonzini wrote:
> If the sectors are unallocated and we are past the end of the
> backing file, they will read as zero.
>
> Signed-off-by: Paolo Bonzini <address@hidden>
> ---
> block.c | 16 ++++++++++++----
> 1 file changed, 12 insertions(+), 4 deletions(-)
Reviewed-by: Eric Blake <address@hidden>
--
Eric Blake eblake redhat com +1-919-301-3266
Libvirt virtualization library http://libvirt.org
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- [Qemu-devel] [PATCH v4 06/21] block: do not use ->total_sectors in bdrv_co_is_allocated, (continued)
- [Qemu-devel] [PATCH v4 06/21] block: do not use ->total_sectors in bdrv_co_is_allocated, Paolo Bonzini, 2013/08/29
- [Qemu-devel] [PATCH v4 07/21] block: remove bdrv_is_allocated_above/bdrv_co_is_allocated_above distinction, Paolo Bonzini, 2013/08/29
- [Qemu-devel] [PATCH v4 09/21] qemu-img: always probe the input image for allocated sectors, Paolo Bonzini, 2013/08/29
- [Qemu-devel] [PATCH v4 10/21] block: make bdrv_has_zero_init return false for copy-on-write-images, Paolo Bonzini, 2013/08/29
- [Qemu-devel] [PATCH v4 13/21] block: return get_block_status data and flags for formats, Paolo Bonzini, 2013/08/29
- [Qemu-devel] [PATCH v4 11/21] block: introduce bdrv_get_block_status API, Paolo Bonzini, 2013/08/29
- [Qemu-devel] [PATCH v4 12/21] block: define get_block_status return value, Paolo Bonzini, 2013/08/29
- [Qemu-devel] [PATCH v4 14/21] block: use bdrv_has_zero_init to return BDRV_BLOCK_ZERO, Paolo Bonzini, 2013/08/29
- [Qemu-devel] [PATCH v4 15/21] block: return BDRV_BLOCK_ZERO past end of backing file, Paolo Bonzini, 2013/08/29
- Re: [Qemu-devel] [PATCH v4 15/21] block: return BDRV_BLOCK_ZERO past end of backing file,
Eric Blake <=
- [Qemu-devel] [PATCH v4 16/21] qemu-img: add a "map" subcommand, Paolo Bonzini, 2013/08/29
- [Qemu-devel] [PATCH v4 17/21] docs, qapi: document qemu-img map, Paolo Bonzini, 2013/08/29
- [Qemu-devel] [PATCH v4 18/21] raw-posix: return get_block_status data and flags, Paolo Bonzini, 2013/08/29
- [Qemu-devel] [PATCH v4 19/21] raw-posix: report unwritten extents as zero, Paolo Bonzini, 2013/08/29
- [Qemu-devel] [PATCH v4 20/21] block: add default get_block_status implementation for protocols, Paolo Bonzini, 2013/08/29
- [Qemu-devel] [PATCH v4 21/21] block: look for zero blocks in bs->file, Paolo Bonzini, 2013/08/29