Stefan Hajnoczi ef72f76e58 qed: refuse unaligned zero writes with a backing file ...

Zero writes have cluster granularity in QED.  Therefore they can only be
used to zero entire clusters.

If the zero write request leaves sectors untouched, zeroing the entire
cluster would obscure the backing file.  Instead return -ENOTSUP, which
is handled by block.c:bdrv_co_do_write_zeroes() and falls back to a
regular write.

The qemu-iotests 034 test cases covers this scenario.

Signed-off-by: Stefan Hajnoczi <stefanha@linux.vnet.ibm.com>
Reviewed-by: Paolo Bonzini <pbonzini@redhat.com>
Signed-off-by: Kevin Wolf <kwolf@redhat.com>

2012-08-29 15:23:35 +02:00

..

blkdebug.c

blkdebug: optionally tie errors to a specific sector

2012-07-09 15:53:02 +02:00

blkverify.c

block: replace unchecked strdup/malloc/calloc with glib

2012-01-26 11:39:03 +01:00

bochs.c

block: take lock around bdrv_read implementations

2011-10-21 17:34:14 +02:00

cloop.c

block/cloop: Use g_free instead of free

2011-11-04 14:24:12 +01:00

cow.c

block: Fix spelling in comment (ineffcient -> inefficient)

2012-04-19 15:48:52 +02:00

curl.c

allow qemu_iovec_from_buffer() to specify offset from which to start copying

2012-06-11 23:12:11 +04:00

dmg.c

block: take lock around bdrv_read implementations

2011-10-21 17:34:14 +02:00

iscsi.c

iscsi: fix races between task completion and abort

2012-08-20 15:58:47 +02:00

Makefile.objs

build: move block/ objects to nested Makefile.objs

2012-06-07 09:21:13 +02:00

nbd.c

cleanup qemu_co_sendv(), qemu_co_recvv() and friends

2012-06-11 23:12:11 +04:00

parallels.c

block: take lock around bdrv_read implementations

2011-10-21 17:34:14 +02:00

qcow2-cache.c

qcow2: always operate caches in writeback mode

2012-06-15 14:03:43 +02:00

qcow2-cluster.c

qcow2: implement lazy refcounts

2012-08-06 22:39:14 +02:00

qcow2-refcount.c

qcow2: preserve free_byte_offset when qcow2_alloc_bytes() fails

2012-07-09 15:53:01 +02:00

qcow2-snapshot.c

qcow2: fix #ifdef'd qcow2_check_refcounts() callers

2012-07-09 15:53:01 +02:00

qcow2.c

block: add BLOCK_O_CHECK for qemu-img check

2012-08-10 10:25:12 +02:00

qcow2.h

qcow2: implement lazy refcounts

2012-08-06 22:39:14 +02:00

qcow.c

change qemu_iovec_to_buf() to match other to,from_buf functions

2012-06-11 23:12:11 +04:00

qed-check.c

qed: mark image clean after repair succeeds

2012-08-10 10:25:12 +02:00

qed-cluster.c

Use glib memory allocation and free functions

2011-08-20 23:01:08 -05:00

qed-gencb.c

Use glib memory allocation and free functions

2011-08-20 23:01:08 -05:00

qed-l2-cache.c

qed: do not evict in-use L2 table cache entries

2012-03-12 15:14:06 +01:00

qed-table.c

block: bdrv_aio_* do not return NULL

2011-12-15 12:40:07 +01:00

qed.c

qed: refuse unaligned zero writes with a backing file

2012-08-29 15:23:35 +02:00

qed.h

qed: mark image clean after repair succeeds

2012-08-10 10:25:12 +02:00

raw-posix-aio.h

prepare for future GPLv2+ relicensing

2012-01-13 10:55:56 -06:00

raw-posix.c

block: Convert close calls to qemu_close

2012-08-15 10:48:57 +02:00

raw-win32.c

block: Convert close calls to qemu_close

2012-08-15 10:48:57 +02:00

raw.c

raw: hook into blkdebug

2012-07-09 15:53:02 +02:00

rbd.c

Merge remote-tracking branch 'mjt/mjt-iov2' into staging

2012-07-09 12:35:06 -05:00

sheepdog.c

sheepdog: don't leak socket file descriptor upon connection failure

2012-08-22 10:47:14 -05:00

stream.c

stream: move rate limiting to a separate header file

2012-06-15 14:03:42 +02:00

vdi.c

block: Convert open calls to qemu_open

2012-08-15 10:48:57 +02:00

vmdk.c

vmdk: Read footer for streamOptimized images

2012-08-17 13:27:02 +02:00

vpc.c

block: Convert close calls to qemu_close

2012-08-15 10:48:57 +02:00

vvfat.c

block: Convert close calls to qemu_close

2012-08-15 10:48:57 +02:00