OpenE2K/qemu-e2k
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qemu-e2k/block
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Max Reitz 564a6b6938 qcow2: Reuse preallocated zero clusters 
Instead of just freeing preallocated zero clusters and completely
allocating them from scratch, reuse them.

We cannot do this in handle_copied(), however, since this is a COW
operation. Therefore, we have to add the new logic to handle_alloc() and
simply return the existing offset if it exists. The only catch is that
we have to convince qcow2_alloc_cluster_link_l2() not to free the old
clusters (because we have reused them).

Reported-by: Eric Blake <eblake@redhat.com>
Signed-off-by: Max Reitz <mreitz@redhat.com>
Reviewed-by: Eric Blake <eblake@redhat.com>
Signed-off-by: Kevin Wolf <kwolf@redhat.com>
2017-05-11 12:08:24 +02:00
..
accounting.c
block: Clean up includes
2016-01-20 13:36:23 +01:00
backup.c
backup: React to bdrv_is_allocated() errors
2017-03-13 12:49:33 +01:00
blkdebug.c
qobject: Use simpler QDict/QList scalar insertion macros
2017-05-09 09:13:51 +02:00
blkreplay.c
block: Do not unref bs->file on error in BD's open
2017-04-27 16:12:13 +02:00
blkverify.c
qobject: Use simpler QDict/QList scalar insertion macros
2017-05-09 09:13:51 +02:00
block-backend.c
block: Add errp to b{lk,drv}_truncate()
2017-04-28 16:02:02 +02:00
bochs.c
block: do not set BDS read_only if copy_on_read enabled
2017-04-24 15:09:33 -04:00
cloop.c
block: do not set BDS read_only if copy_on_read enabled
2017-04-24 15:09:33 -04:00
commit.c
block: Add errp to b{lk,drv}_truncate()
2017-04-28 16:02:02 +02:00
crypto.c
block: Add errp to BD.bdrv_truncate()
2017-04-28 16:02:03 +02:00
curl.c
qobject: Use simpler QDict/QList scalar insertion macros
2017-05-09 09:13:51 +02:00
dirty-bitmap.c
block: More operations for meta dirty bitmap
2016-10-24 17:56:07 +02:00
dmg-bz2.c
dmg: Move libbz2 code to dmg-bz2.so
2016-10-07 14:14:06 +02:00
dmg.c
block: do not set BDS read_only if copy_on_read enabled
2017-04-24 15:09:33 -04:00
dmg.h
dmg: Move libbz2 code to dmg-bz2.so
2016-10-07 14:14:06 +02:00
file-posix.c
file-posix: Add image locking to perm operations
2017-05-11 11:15:32 +02:00
file-win32.c
file-win32: Error out if locking=on
2017-05-11 11:08:41 +02:00
gluster.c
sockets: Rename SocketAddressFlat to SocketAddress
2017-05-09 09:14:40 +02:00
io.c
block: fix alignment calculations in bdrv_co_do_zero_pwritev
2017-04-27 16:24:01 +02:00
iscsi-opts.c
block/iscsi: statically link qemu_iscsi_opts
2017-01-27 18:07:58 +01:00
iscsi.c
block: Add .bdrv_truncate() error messages
2017-04-28 16:02:03 +02:00
linux-aio.c
block: explicitly acquire aiocontext in aio callbacks that need it
2017-02-21 11:39:39 +00:00
Makefile.objs
block/vxhs.c: Add support for a new block device type called "vxhs"
2017-04-24 15:08:42 -04:00
mirror.c
block: Add errp to b{lk,drv}_truncate()
2017-04-28 16:02:02 +02:00
nbd-client.c
nbd-client: fix handling of hungup connections
2017-03-27 16:50:36 +02:00
nbd-client.h
nbd: drop unused NBDClientSession.is_unix field
2017-03-27 14:41:01 +02:00
nbd.c
sockets: Limit SocketAddressLegacy to external interfaces
2017-05-09 09:14:40 +02:00
nfs.c
qobject: Use simpler QDict/QList scalar insertion macros
2017-05-09 09:13:51 +02:00
null.c
qobject: Use simpler QDict/QList scalar insertion macros
2017-05-09 09:13:51 +02:00
parallels.c
block: Add errp to b{lk,drv}_truncate()
2017-04-28 16:02:02 +02:00
qapi.c
block: Don't bother asserting type of output visitor's output
2017-02-22 19:52:20 +01:00
qcow2-cache.c
qcow2: Remove stale comment
2016-11-25 13:51:30 +01:00
qcow2-cluster.c
qcow2: Reuse preallocated zero clusters
2017-05-11 12:08:24 +02:00
qcow2-refcount.c
block: Add errp to b{lk,drv}_truncate()
2017-04-28 16:02:02 +02:00
qcow2-snapshot.c
block: Convert bdrv_pwrite(v/_sync) to BdrvChild
2016-07-05 16:46:27 +02:00
qcow2.c
qcow2: Fix preallocation size formula
2017-05-11 12:08:24 +02:00
qcow2.h
qcow2: Reuse preallocated zero clusters
2017-05-11 12:08:24 +02:00
qcow.c
block: Add errp to b{lk,drv}_truncate()
2017-04-28 16:02:02 +02:00
qed-check.c
qed: Use DIV_ROUND_UP
2016-06-07 18:19:24 +03:00
qed-cluster.c
block: explicitly acquire aiocontext in aio callbacks that need it
2017-02-21 11:39:39 +00:00
qed-gencb.c
block: Clean up includes
2016-01-20 13:36:23 +01:00
qed-l2-cache.c
block: Clean up includes
2016-01-20 13:36:23 +01:00
qed-table.c
block: explicitly acquire aiocontext in aio callbacks that need it
2017-02-21 11:39:39 +00:00
qed.c
block: Add .bdrv_truncate() error messages
2017-04-28 16:02:03 +02:00
qed.h
block: explicitly acquire aiocontext in timers that need it
2017-02-21 11:14:08 +00:00
quorum.c
qobject: Use simpler QDict/QList scalar insertion macros
2017-05-09 09:13:51 +02:00
raw-format.c
block: Add .bdrv_truncate() error messages
2017-04-28 16:02:03 +02:00
rbd.c
qobject: Use simpler QDict/QList scalar insertion macros
2017-05-09 09:13:51 +02:00
replication.c
block: Make errp the last parameter of commit_active_start
2017-04-24 09:13:44 +02:00
sheepdog.c
sockets: Limit SocketAddressLegacy to external interfaces
2017-05-09 09:14:40 +02:00
snapshot.c
qobject: Use simpler QDict/QList scalar insertion macros
2017-05-09 09:13:51 +02:00
ssh.c
qobject: Use simpler QDict/QList scalar insertion macros
2017-05-09 09:13:51 +02:00
stream.c
block: Add Error parameter to bdrv_set_backing_hd()
2017-02-28 20:47:51 +01:00
throttle-groups.c
coroutine-lock: add mutex argument to CoQueue APIs
2017-02-21 11:39:40 +00:00
trace-events
block/vxhs.c: Add support for a new block device type called "vxhs"
2017-04-24 15:08:42 -04:00
vdi.c
block: Add errp to b{lk,drv}_truncate()
2017-04-28 16:02:02 +02:00
vhdx-endian.c
vhdx: Use QEMU UUID API
2016-09-23 11:42:52 +08:00
vhdx-log.c
block: Add errp to b{lk,drv}_truncate()
2017-04-28 16:02:02 +02:00
vhdx.c
block: Add errp to b{lk,drv}_truncate()
2017-04-28 16:02:02 +02:00
vhdx.h
block: vhdx - update PAYLOAD_BLOCK_UNMAPPED value to match 1.00 spec
2014-12-12 15:42:22 +00:00
vmdk.c
block: Add errp to b{lk,drv}_truncate()
2017-04-28 16:02:02 +02:00
vpc.c
block: Add errp to b{lk,drv}_truncate()
2017-04-28 16:02:02 +02:00
vvfat.c
qobject: Use simpler QDict/QList scalar insertion macros
2017-05-09 09:13:51 +02:00
vxhs.c
qobject: Use simpler QDict/QList scalar insertion macros
2017-05-09 09:13:51 +02:00
win32-aio.c
block: explicitly acquire aiocontext in aio callbacks that need it
2017-02-21 11:39:39 +00:00
write-threshold.c
block: use bdrv_add_before_write_notifier
2016-10-07 13:34:07 +02:00