riscv/qemu: QEMU main repository: Please see https://www.qemu.org/docs/master/devel/submitting-a-patch.html for how to submit changes to QEMU. Pull Requests are ignored. Please only use release tarballs from the QEMU website. http://www.qemu.org - qemu

QEMU main repository: Please see https://www.qemu.org/docs/master/devel/submitting-a-patch.html for how to submit changes to QEMU. Pull Requests are ignored. Please only use release tarballs from the QEMU website. http://www.qemu.org

emulation kvm qemu virtualization

History

Eric Blake 253b43a290 mirror: Drop redundant zero_target parameter The two callers to a mirror job (drive-mirror and blockdev-mirror) set zero_target precisely when sync mode == FULL, with the one exception that drive-mirror skips zeroing the target if it was newly created and reads as zero. But given the previous patch, that exception is equally captured by target_is_zero. Meanwhile, there is another slight wrinkle, fortunately caught by iotest 185: if the caller uses "sync":"top" but the source has no backing file, the code in blockdev.c was changing sync to be FULL, but only after it had set zero_target=false. In mirror.c, prior to recent patches, this didn't matter: the only places that inspected sync were setting is_none_mode (both TOP and FULL had set that to false), and mirror_start() setting base = mode == MIRROR_SYNC_MODE_TOP ? bdrv_backing_chain_next(bs) : NULL. But now that we are passing sync around, the slammed sync mode would result in a new pre-zeroing pass even when the user had passed "sync":"top" in an effort to skip pre-zeroing. Fortunately, the assignment of base when bs has no backing chain still works out to NULL if we don't slam things. So with the forced change of sync ripped out of blockdev.c, the sync mode is passed through the full callstack unmolested, and we can now reliably reconstruct the same settings as what used to be passed in by zero_target=false, without the redundant parameter. Signed-off-by: Eric Blake <eblake@redhat.com> Message-ID: <20250509204341.3553601-24-eblake@redhat.com> Reviewed-by: Sunny Zhu <sunnyzhyy@qq.com> Reviewed-by: Stefan Hajnoczi <stefanha@redhat.com> [eblake: Fix regression in iotest 185] Signed-off-by: Eric Blake <eblake@redhat.com>		11 months ago
..
accounting.h	block: add accounting for zone append operation	3 years ago
aio-wait.h	system/cpus: rename qemu_mutex_lock_iothread() to bql_lock()	2 years ago
aio.h	aio-posix: Separate AioPolledEvent per AioHandler	1 year ago
aio_task.h	block: Remove unused aio_task_pool_empty	2 years ago
block-common.h	block: Expand block status mode from bool to flags	11 months ago
block-copy.h	copy-before-write: allow specifying minimum cluster size	2 years ago
block-global-state.h	block: Add blockdev-set-active QMP command	1 year ago
block-hmp-cmds.h	include/block: Untangle inclusion loops	3 years ago
block-io.h	block: Add new bdrv_co_is_all_zeroes() function	11 months ago
block.h	include/block: Untangle inclusion loops	3 years ago
block_backup.h	include/block: Untangle inclusion loops	3 years ago
block_int-common.h	block: Expand block status mode from bool to flags	11 months ago
block_int-global-state.h	mirror: Drop redundant zero_target parameter	11 months ago
block_int-io.h	block: Expand block status mode from bool to flags	11 months ago
block_int.h	include/block: Untangle inclusion loops	3 years ago
blockjob.h	Rename "QEMU global mutex" to "BQL" in comments and docs	2 years ago
blockjob_int.h	block: Mark block_job_add_bdrv() GRAPH_WRLOCK	2 years ago
dirty-bitmap.h	block: Mark bdrv_*_dirty_bitmap() and callers GRAPH_RDLOCK	3 years ago
export.h	block/export: Add option to allow export of inactive nodes	1 year ago
fuse.h	fuse: Allow exporting BDSs via FUSE	5 years ago
graph-lock.h	qemu/compiler: Absorb 'clang-tsa.h'	1 year ago
nbd.h	nbd/server: Allow users to adjust handshake limit in QMP	1 year ago
nvme.h	hw/nvme: set error status code explicitly for misc commands	1 year ago
qapi.h	block: Mark bdrv_get_parent_name() and callers GRAPH_RDLOCK	3 years ago
qdict.h	qapi: Move include/qapi/qmp/ to include/qobject/	1 year ago
raw-aio.h	file-posix: Support FUA writes	1 year ago
replication.h	replication: move include out of root directory	5 years ago
reqlist.h	block/reqlist: add reqlist_wait_all()	4 years ago
snapshot.h	block: remove AioContext locking	2 years ago
thread-pool.h	thread-pool: Implement generic (non-AIO) pool support	1 year ago
throttle-groups.h	block/throttle-groups: Use ThrottleDirection instread of bool is_write	3 years ago
ufs.h	hw/ufs: Add temperature event notification support	1 year ago
write-threshold.h	block: Clean up includes	3 years ago