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xen-devel
Re: [Xen-devel] [PATCH] blktap: qcow2 image format support
Hi,
On Thu, Feb 21, 2008 at 10:31:35AM +0000, Keir Fraser wrote:
> On 21/2/08 08:49, "Kevin Wolf" <kwolf@xxxxxxx> wrote:
>
> > This patch adds support for the qcow2 image format to blktap. It
> > consists mostly of qemu code, adapted to the blktap interfaces.
> > Snapshots and compressed images are supported.
> >
> > The qcow2 driver may be used by either specifying tap:qcow2 or by using
> > tap:qcow which will detect that you have a version 2 image and will call
> > the qcow2 driver.
>
> Applied. I had to convert lx to PRIx64 in a number of places.
>
> -- Ekir
Don't know if this build breakage has been reported yet:
gcc -O2 -g -pipe -Wall -Wp,-D_FORTIFY_SOURCE=2 -fexceptions -fstack-protector
--param=ssp-buffer-size=4 -m32 -march=i386 -mtune=generic
-fasynchronous-unwind-tables -m32 -march=i686 -fno-strict-aliasing -std=gnu99
-Wall -Wstrict-prototypes -Wno-unused-value -Wdeclaration-after-statement -m32
-march=i686 -fno-strict-aliasing -std=gnu99 -Wall -Wstrict-prototypes
-Wno-unused-value -Wdeclaration-after-statement -m32 -march=i686
-fno-strict-aliasing -std=gnu99 -Wall -Wstrict-prototypes -Wno-unused-value
-Wdeclaration-after-statement -D__XEN_TOOLS__ -D_LARGEFILE_SOURCE
-D_FILE_OFFSET_BITS=64 -D_LARGEFILE_SOURCE -D_LARGEFILE64_SOURCE
-mno-tls-direct-seg-refs -m32 -march=i686 -fno-strict-aliasing -std=gnu99 -Wall
-Wstrict-prototypes -Wno-unused-value -Wdeclaration-after-statement
-D__XEN_TOOLS__ -D_LARGEFILE_SOURCE -D_FILE_OFFSET_BITS=64 -D_LARGEFILE_SOURCE
-D_LARGEFILE64_SOURCE -mno-tls-direct-seg-refs -m32 -march=i686
-fno-strict-aliasing -std=gnu99 -Wall -Wstrict-prototypes -Wno-unused-value
-Wdeclaration-after-statement -D__XEN_TOOLS__ -D_LARGEFILE_SOURCE
-D_FILE_OFFSET_BITS=64 -D_LARGEFILE_SOURCE -D_LARGEFILE64_SOURCE
-mno-tls-direct-seg-refs -m32 -march=i686 -fno-strict-aliasing -std=gnu99 -Wall
-Wstrict-prototypes -Wno-unused-value -Wdeclaration-after-statement
-D__XEN_TOOLS__ -D_LARGEFILE_SOURCE -D_FILE_OFFSET_BITS=64 -D_LARGEFILE_SOURCE
-D_LARGEFILE64_SOURCE -mno-tls-direct-seg-refs -Werror -Wno-unused
-I../../../tools/libxc -I../../../tools/include -I ../../libaio/src -I..
-I../lib -I../../../tools/include -I. -I../../xenstore -D_GNU_SOURCE
-Wp,-MD,.block-qcow2.o.d -c -o block-qcow2.o block-qcow2.c
cc1: warnings being treated as errors
block-qcow2.c: In function 'qcow2_create':
block-qcow2.c:1512: warning: ignoring return value of 'write', declared with
attribute warn_unused_result
block-qcow2.c:1514: warning: ignoring return value of 'write', declared with
attribute warn_unused_result
block-qcow2.c:1519: warning: ignoring return value of 'write', declared with
attribute warn_unused_result
block-qcow2.c:1522: warning: ignoring return value of 'write', declared with
attribute warn_unused_result
block-qcow2.c:1525: warning: ignoring return value of 'write', declared with
attribute warn_unused_result
block-qcow2.c: In function 'qcow_write_compressed':
block-qcow2.c:1554: warning: ignoring return value of 'ftruncate',
declared with attribute warn_unused_result
make[4]: *** [block-qcow2.o] Error 1
make[4]: Leaving directory
`/builddir/build/BUILD/xen-unstable/tools/blktap/drivers'
Need to deal with return value of writes in qcow2_create() and ftruncate
in qcow_write_compressed(). Probably need to deal with errno too.
Thanks
kurt
--
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