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Andrey Shinkevich 000e5a1cda stream: rework backing-file changing 
Stream in stream_prepare calls bdrv_change_backing_file() to change
backing-file in the metadata of bs.

It may use either backing-file parameter given by user or just take
filename of base on job start.

Backing file format is determined by base on job finish.

There are some problems with this design, we solve only two by this
patch:

1. Consider scenario with backing-file unset. Current concept of stream
supports changing of the base during the job (we don't freeze link to
the base). So, we should not save base filename at job start,

  - let's determine name of the base on job finish.

2. Using direct base to determine filename and format is not very good:
base node may be a filter, so its filename may be JSON, and format_name
is not good for storing into qcow2 metadata as backing file format.

  - let's use unfiltered_base

Signed-off-by: Andrey Shinkevich <andrey.shinkevich@virtuozzo.com>
Signed-off-by: Vladimir Sementsov-Ogievskiy <vsementsov@virtuozzo.com>
  [vsementsov: change commit subject, change logic in stream_prepare]
Message-Id: <20201216061703.70908-10-vsementsov@virtuozzo.com>
Reviewed-by: Max Reitz <mreitz@redhat.com>
Signed-off-by: Max Reitz <mreitz@redhat.com>
 		2021-01-26 14:36:37 +01:00
..
export fuse: Implement hole detection through lseek 2020-12-11 17:52:40 +01:00
monitor qapi: add filter-node-name to block-stream 2021-01-26 11:26:54 +01:00
accounting.c block/accounting: Use lock guard macros 2020-12-11 17:52:39 +01:00
aio_task.c block: introduce aio task pool 2019-10-10 10:56:17 +02:00
amend.c block/amend: Check whether the node exists 2020-07-27 12:37:25 +02:00
backup-top.c block: Inline bdrv_co_block_status_from_*() 2020-09-07 12:31:31 +02:00
backup-top.h block: introduce backup-top filter driver 2019-10-10 10:56:18 +02:00
backup.c backup: Deal with filters 2020-09-07 12:31:31 +02:00
blkdebug.c block: Fix some code style problems, "foo* bar" should be "foo *bar" 2020-11-09 18:42:47 +01:00
blklogwrites.c block: Inline bdrv_co_block_status_from_*() 2020-09-07 12:31:31 +02:00
blkreplay.c block: Use bdrv_default_perms() 2020-05-18 19:05:25 +02:00
blkverify.c error: Eliminate error_propagate() with Coccinelle, part 2 2020-07-10 15:18:08 +02:00
block-backend.c qemu/atomic.h: rename atomic_ to qatomic_ 2020-09-23 16:07:44 +01:00
block-copy.c block-copy: Use CAF to find sync=top base 2020-09-07 12:31:31 +02:00
block-gen.h scripts: add block-coroutine-wrapper.py 2020-10-05 10:59:06 +01:00
bochs.c block: Use bdrv_default_perms() 2020-05-18 19:05:25 +02:00
cloop.c block: Use bdrv_default_perms() 2020-05-18 19:05:25 +02:00
commit.c block: Return depth level during bdrv_is_allocated_above 2020-10-30 15:21:23 -05:00
copy-on-read.c copy-on-read: skip non-guest reads if no copy needed 2021-01-26 14:36:37 +01:00
copy-on-read.h copy-on-read: add filter drop function 2021-01-26 11:26:54 +01:00
coroutines.h block: Return depth level during bdrv_is_allocated_above 2020-10-30 15:21:23 -05:00
create.c block/create: Do not abort if a block driver is not available 2019-09-13 12:18:37 +02:00
crypto.c nomaintainer: Fix Lesser GPL version number 2020-11-15 17:04:40 +01:00
crypto.h nomaintainer: Fix Lesser GPL version number 2020-11-15 17:04:40 +01:00
curl.c curl: remove compatibility code, require 7.29.0 2021-01-02 21:03:37 +01:00
dirty-bitmap.c block/dirty-bitmap: add bdrv_has_named_bitmaps helper 2020-05-28 13:15:22 -05:00
dmg-bz2.c Include qemu-common.h exactly where needed 2019-06-12 13:20:20 +02:00
dmg-lzfse.c block: Remove unused include 2020-11-09 15:44:21 +01:00
dmg.c block: Fix some code style problems, "foo* bar" should be "foo *bar" 2020-11-09 18:42:47 +01:00
dmg.h Include qemu-common.h exactly where needed 2019-06-12 13:20:20 +02:00
file-posix.c block: bdrv_mark_request_serialising: split non-waiting function 2020-12-18 12:35:55 +01:00
file-win32.c block/file: switch to use qemu_open/qemu_create for improved errors 2020-09-16 10:33:48 +01:00
filter-compress.c block: Inline bdrv_co_block_status_from_*() 2020-09-07 12:31:31 +02:00
gluster.c qapi: Use QAPI_LIST_PREPEND() where possible 2020-12-19 10:20:14 +01:00
io.c block: include supported_read_flags into BDS structure 2021-01-26 14:36:37 +01:00
io_uring.c io_uring: do not use pointer after free 2020-11-17 12:26:48 +01:00
iscsi-opts.c Include qemu/module.h where needed, drop it from qemu-common.h 2019-06-12 13:18:33 +02:00
iscsi.c Remove superfluous timer_del() calls 2021-01-08 15:13:38 +00:00
linux-aio.c misc: Replace zero-length arrays with flexible array member (automatic) 2020-03-16 22:07:42 +01:00
meson.build meson: Propagate gnutls dependency 2021-01-12 12:38:03 +01:00
mirror.c block: Return depth level during bdrv_is_allocated_above 2020-10-30 15:21:23 -05:00
nbd.c block/nbd.c: Add yank feature 2021-01-13 10:21:17 +01:00
nfs.c block/nfs: fix int overflow in nfs_client_open_qdict 2020-12-18 11:48:39 +01:00
null.c block/null: Implement bdrv_get_allocated_file_size 2020-09-07 12:31:31 +02:00
nvme.c block/nvme: Implement fake truncate() coroutine 2020-12-18 12:35:55 +01:00
parallels.c error: Avoid error_propagate() after migrate_add_blocker() 2020-07-10 15:18:08 +02:00
parallels.h Clean up includes 2018-02-09 05:05:11 +01:00
preallocate.c block: introduce preallocate filter 2020-12-18 12:35:55 +01:00
qapi-sysemu.c block: Move system emulator QMP commands to block/qapi-sysemu.c 2020-03-06 17:15:38 +01:00
qapi.c qapi: Use QAPI_LIST_PREPEND() where possible 2020-12-19 10:20:14 +01:00
qcow.c block/qcow: remove runtime opts 2020-09-15 11:05:13 +02:00
qcow2-bitmap.c qcow2: Use macros for the L1, refcount and bitmap table entry sizes 2020-09-15 11:05:12 +02:00
qcow2-cache.c core: replace getpagesize() with qemu_real_host_page_size 2019-10-26 15:38:06 +02:00
qcow2-cluster.c qcow2: Fix corruption on write_zeroes with MAY_UNMAP 2020-11-24 11:29:41 +01:00
qcow2-refcount.c qcow2: Make qcow2_free_any_clusters() free only one cluster 2020-09-15 11:05:13 +02:00
qcow2-snapshot.c migration: introduce icount field for snapshots 2020-10-06 08:34:49 +02:00
qcow2-threads.c qcow2: add zstd cluster compression 2020-05-13 14:20:31 +02:00
qcow2.c Remove superfluous timer_del() calls 2021-01-08 15:13:38 +00:00
qcow2.h block: Fix some code style problems, "foo* bar" should be "foo *bar" 2020-11-09 18:42:47 +01:00
qed-check.c block/qed: add missed coroutine_fn markers 2019-04-30 15:29:00 +02:00
qed-cluster.c qed: protect table cache with CoMutex 2017-07-17 11:34:11 +08:00
qed-l2-cache.c qed: protect table cache with CoMutex 2017-07-17 11:34:11 +08:00
qed-table.c block/qed: add missed coroutine_fn markers 2019-04-30 15:29:00 +02:00
qed.c qapi: Smooth another visitor error checking pattern 2020-07-10 15:18:08 +02:00
qed.h qed: Simplify backing reads 2020-07-06 10:34:14 +02:00
quorum.c quorum: Implement bdrv_co_pwrite_zeroes() 2020-12-18 12:35:55 +01:00
raw-format.c error: Eliminate error_propagate() with Coccinelle, part 2 2020-07-10 15:18:08 +02:00
rbd.c qobject: Change qobject_to_json()'s value to GString 2020-12-19 10:38:43 +01:00
replication.c error: Reduce unnecessary error propagation 2020-07-10 15:18:08 +02:00
sheepdog.c block: deprecate the sheepdog block driver 2020-10-15 16:06:28 +02:00
snapshot.c block/snapshot: Fix fallback 2020-09-07 12:31:31 +02:00
ssh.c qapi: Smooth another visitor error checking pattern 2020-07-10 15:18:08 +02:00
stream.c stream: rework backing-file changing 2021-01-26 14:36:37 +01:00
throttle-groups.c block/throttle-groups: Use lock guard macros 2020-12-11 17:52:39 +01:00
throttle.c qemu/atomic.h: rename atomic_ to qatomic_ 2020-09-23 16:07:44 +01:00
trace-events block/nvme: Use unsigned integer for queue counter/size 2020-11-03 19:06:21 +00:00
trace.h trace: switch position of headers to what Meson requires 2020-08-21 06:18:24 -04:00
vdi.c error: Avoid error_propagate() after migrate_add_blocker() 2020-07-10 15:18:08 +02:00
vhdx-endian.c Include qemu-common.h exactly where needed 2019-06-12 13:20:20 +02:00
vhdx-log.c block: Add flags to bdrv(_co)_truncate() 2020-04-30 17:51:07 +02:00
vhdx.c block/vhdx: Support vhdx image only with 512 bytes logical sector size 2020-09-15 11:05:13 +02:00
vhdx.h block/vhdx: Use IEC binary prefixes for size constants 2019-04-30 15:29:00 +02:00
vmdk.c vmdk: fix maybe uninitialized warnings 2020-10-13 13:33:45 +02:00
vpc.c block/vpc: Use sizeof() instead of HEADER_SIZE for footer size 2020-12-18 12:43:30 +01:00
vvfat.c block/vvfat: Fix bad printf format specifiers 2020-11-03 16:24:56 +01:00
win32-aio.c Include qemu/module.h where needed, drop it from qemu-common.h 2019-06-12 13:18:33 +02:00
write-threshold.c qapi: Drop qapi_event_send_FOO()'s Error ** argument 2018-08-28 18:21:38 +02:00