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Fiona Ebner cfac5a963e block/qapi: include child references in block device info 
In combination with using a throttle filter to enforce IO limits for
a guest device, knowing the 'file' child of a block device can be
useful. If the throttle filter is only intended for guest IO, block
jobs should not also be limited by the throttle filter, so the
block operations need to be done with the 'file' child of the top
throttle node as the target. In combination with mirroring, the name
of that child is not fixed.

Another scenario is when unplugging a guest device after mirroring
below a top throttle node, where the mirror target is added explicitly
via blockdev-add. After mirroring, the target becomes the new 'file'
child of the throttle node. For unplugging, both the top throttle node
and the mirror target need to be deleted, because only implicitly
added child nodes are deleted automatically, and the current 'file'
child of the throttle node was explicitly added (as the mirror
target).

In other scenarios, it could be useful to follow the backing chain.

Note that iotests 191 and 273 use _filter_img_info, so the 'children'
information is filtered out there.

Signed-off-by: Fiona Ebner <f.ebner@proxmox.com>
Message-ID: <20250702123204.325470-2-f.ebner@proxmox.com>
Reviewed-by: Kevin Wolf <kwolf@redhat.com>
Signed-off-by: Kevin Wolf <kwolf@redhat.com>
2025-07-14 17:10:57 +02:00
..
export block/export: Add option to allow export of inactive nodes 2025-02-06 14:46:40 +01:00
monitor block: mark blk_remove_bs() as GRAPH_UNLOCKED 2025-07-14 15:42:10 +02:00
accounting.c include: Rename sysemu/ -> system/ 2024-12-20 17:44:56 +01:00
aio_task.c block: Remove unused aio_task_pool_empty 2024-09-30 10:53:18 +03:00
amend.c block: Mark BlockDriver callbacks for amend job GRAPH_RDLOCK 2023-05-10 14:16:54 +02:00
backup.c block: add bdrv_graph_wrlock_drained() convenience wrapper 2025-07-14 15:40:58 +02:00
blkdebug.c block: Expand block status mode from bool to flags 2025-05-14 15:33:34 -05:00
blkio.c include/system: Move exec/memory.h to system/memory.h 2025-04-23 14:08:21 -07:00
blklogwrites.c block: add bdrv_graph_wrlock_drained() convenience wrapper 2025-07-14 15:40:58 +02:00
blkreplay.c include: Rename sysemu/ -> system/ 2024-12-20 17:44:56 +01:00
blkverify.c block: add bdrv_graph_wrlock_drained() convenience wrapper 2025-07-14 15:40:58 +02:00
block-backend.c block: add bdrv_graph_wrlock_drained() convenience wrapper 2025-07-14 15:40:58 +02:00
block-copy.c include: Rename sysemu/ -> system/ 2024-12-20 17:44:56 +01:00
block-gen.h block-coroutine-wrapper.py: support also basic return types 2022-12-15 16:07:43 +01:00
block-ram-registrar.c include: Rename sysemu/ -> system/ 2024-12-20 17:44:56 +01:00
bochs.c block: Take graph lock for most of .bdrv_open 2023-11-08 17:56:18 +01:00
cloop.c block: Take graph lock for most of .bdrv_open 2023-11-08 17:56:18 +01:00
commit.c block/commit: mark commit_abort() as GRAPH_UNLOCKED 2025-07-14 15:42:13 +02:00
copy-before-write.c block: Expand block status mode from bool to flags 2025-05-14 15:33:34 -05:00
copy-before-write.h blockdev-backup: Add error handling option for copy-before-write jobs 2025-05-12 18:19:31 +03:00
copy-on-read.c qapi: Move include/qapi/qmp/ to include/qobject/ 2025-02-10 15:33:16 +01:00
copy-on-read.h block: Mark bdrv_(un)freeze_backing_chain() and callers GRAPH_RDLOCK 2023-11-07 19:14:19 +01:00
coroutines.h block: Expand block status mode from bool to flags 2025-05-14 15:33:34 -05:00
create.c qemu/compiler: Absorb 'clang-tsa.h' 2025-03-06 14:21:25 +01:00
crypto.c include: Rename sysemu/ -> system/ 2024-12-20 17:44:56 +01:00
crypto.h block: Support detached LUKS header creation using qemu-img 2024-02-09 12:50:37 +00:00
curl.c qapi: Move include/qapi/qmp/ to include/qobject/ 2025-02-10 15:33:16 +01:00
dirty-bitmap.c block: Mark bdrv_*_dirty_bitmap() and callers GRAPH_RDLOCK 2023-02-23 19:49:32 +01:00
dmg-bz2.c Include qemu-common.h exactly where needed 2019-06-12 13:20:20 +02:00
dmg-lzfse.c block/dmg: Ignore C99 prototype declaration mismatch from <lzfse.h> 2023-03-30 15:03:36 +02:00
dmg.c block: Protect bs->file with graph_lock 2023-11-08 17:56:18 +01:00
dmg.h block/dmg: Declare a type definition for DMG uncompress function 2023-04-24 13:53:44 -04:00
file-posix.c file-posix: Probe paths and retry SG_IO on potential path errors 2025-05-22 17:56:50 +02:00
file-win32.c qapi: Move include/qapi/qmp/ to include/qobject/ 2025-02-10 15:33:16 +01:00
filter-compress.c block: Take graph lock for most of .bdrv_open 2023-11-08 17:56:18 +01:00
gluster.c file-posix, gluster: Handle zero block status hint better 2025-05-14 15:49:27 -05:00
graph-lock.c block: add bdrv_graph_wrlock_drained() convenience wrapper 2025-07-14 15:40:58 +02:00
io.c block: never use atomics to access bs->quiesce_counter 2025-07-14 15:40:45 +02:00
io_uring.c file-posix: Support FUA writes 2025-03-13 17:44:55 +01:00
iscsi-opts.c modules: add block module annotations 2021-07-09 18:20:27 +02:00
iscsi.c block: Expand block status mode from bool to flags 2025-05-14 15:33:34 -05:00
linux-aio.c block: skip automatic zero-init of large array in ioq_submit 2025-06-12 13:39:08 -04:00
meson.build include: Rename sysemu/ -> system/ 2024-12-20 17:44:56 +01:00
mirror.c block: drop wrapper for bdrv_set_backing_hd_drained() 2025-07-14 15:41:58 +02:00
nbd.c block: Expand block status mode from bool to flags 2025-05-14 15:33:34 -05:00
nfs.c qapi: Move include/qapi/qmp/ to include/qobject/ 2025-02-10 15:33:16 +01:00
null.c block: Expand block status mode from bool to flags 2025-05-14 15:33:34 -05:00
nvme.c block/nvme: Use host PCI MMIO API 2025-05-08 10:21:10 -04:00
parallels-ext.c qapi/crypto: Rename QCryptoHashAlgorithm to *Algo, and drop prefix 2024-09-10 14:02:16 +02:00
parallels.c block: Expand block status mode from bool to flags 2025-05-14 15:33:34 -05:00
parallels.h block: Protect bs->file with graph_lock 2023-11-08 17:56:18 +01:00
preallocate.c block: Protect bs->file with graph_lock 2023-11-08 17:56:18 +01:00
progress_meter.c coroutine: Clean up superfluous inclusion of qemu/lockable.h 2023-01-19 10:18:28 +01:00
qapi-system.c qapi: Move include/qapi/qmp/ to include/qobject/ 2025-02-10 15:33:16 +01:00
qapi.c block/qapi: include child references in block device info 2025-07-14 17:10:57 +02:00
qcow.c block: Expand block status mode from bool to flags 2025-05-14 15:33:34 -05:00
qcow2-bitmap.c block/qcow2-bitmap: Replace g_memdup() by g_memdup2() 2024-05-08 19:11:34 +02:00
qcow2-cache.c qcow2: Mark qcow2_signal_corruption() and callers GRAPH_RDLOCK 2023-10-12 16:31:33 +02:00
qcow2-cluster.c qcow2: Take locks for accessing bs->file 2023-11-08 17:56:17 +01:00
qcow2-refcount.c qcow2: Mark qcow2_signal_corruption() and callers GRAPH_RDLOCK 2023-10-12 16:31:33 +02:00
qcow2-snapshot.c include: Rename sysemu/ -> system/ 2024-12-20 17:44:56 +01:00
qcow2-threads.c thread-pool: avoid passing the pool parameter every time 2023-04-25 13:17:28 +02:00
qcow2.c block: add bdrv_graph_wrlock_drained() convenience wrapper 2025-07-14 15:40:58 +02:00
qcow2.h qcow2: Take locks for accessing bs->file 2023-11-08 17:56:17 +01:00
qed-check.c qed: mark more functions as coroutine_fns and GRAPH_RDLOCK 2023-06-28 09:46:20 +02:00
qed-cluster.c qed: protect table cache with CoMutex 2017-07-17 11:34:11 +08:00
qed-l2-cache.c osdep: Move memalign-related functions to their own header 2022-03-07 13:16:49 +00:00
qed-table.c block: use bdrv_co_debug_event in coroutine context 2023-06-28 09:46:34 +02:00
qed.c block: Expand block status mode from bool to flags 2025-05-14 15:33:34 -05:00
qed.h block: Protect bs->file with graph_lock 2023-11-08 17:56:18 +01:00
quorum.c block: add bdrv_graph_wrlock_drained() convenience wrapper 2025-07-14 15:40:58 +02:00
raw-format.c block: Expand block status mode from bool to flags 2025-05-14 15:33:34 -05:00
rbd.c block: Expand block status mode from bool to flags 2025-05-14 15:33:34 -05:00
replication.c block: mark bdrv_reopen_queue() and bdrv_reopen_multiple() as GRAPH_UNLOCKED 2025-07-14 15:42:05 +02:00
reqlist.c block/reqlist: allow adding overlapping requests 2024-09-30 10:53:18 +03:00
snapshot-access.c block: Expand block status mode from bool to flags 2025-05-14 15:33:34 -05:00
snapshot.c block: add bdrv_graph_wrlock_drained() convenience wrapper 2025-07-14 15:40:58 +02:00
ssh.c qapi: Move include/qapi/qmp/ to include/qobject/ 2025-02-10 15:33:16 +01:00
stream.c block/stream: mark stream_prepare() as GRAPH_UNLOCKED 2025-07-14 15:42:04 +02:00
throttle-groups.c qom: Make InterfaceInfo[] uses const 2025-04-25 17:00:41 +02:00
throttle.c block: Take graph lock for most of .bdrv_open 2023-11-08 17:56:18 +01:00
trace-events nbd/client: Accept 64-bit block status chunks 2023-10-05 11:02:08 -05:00
trace.h trace: switch position of headers to what Meson requires 2020-08-21 06:18:24 -04:00
vdi.c block: Expand block status mode from bool to flags 2025-05-14 15:33:34 -05:00
vhdx-endian.c Include qemu-common.h exactly where needed 2019-06-12 13:20:20 +02:00
vhdx-log.c vhdx: Take locks for accessing bs->file 2023-11-08 17:56:18 +01:00
vhdx.c qapi: Move include/qapi/qmp/ to include/qobject/ 2025-02-10 15:33:16 +01:00
vhdx.h vhdx: Take locks for accessing bs->file 2023-11-08 17:56:18 +01:00
vmdk.c block: mark bdrv_open_child_common() and its callers GRAPH_UNLOCKED 2025-07-14 15:42:27 +02:00
vpc.c block: Expand block status mode from bool to flags 2025-05-14 15:33:34 -05:00
vvfat.c block: Expand block status mode from bool to flags 2025-05-14 15:33:34 -05:00
win32-aio.c aio: remove aio_disable_external() API 2023-05-30 17:37:26 +02:00
write-threshold.c block: remove AioContext locking 2023-12-21 22:49:27 +01:00