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Stefan Hajnoczi d704a13d2c block: use pwrite_zeroes_alignment when writing first sector ... Since commit 5634622bcb ("file-posix: allow BLKZEROOUT with -t writeback"), qemu-img create errors out on a Linux loop block device with a 4 KB sector size: # dd if=/dev/zero of=blockfile bs=1M count=1024 # losetup --sector-size 4096 /dev/loop0 blockfile # qemu-img create -f raw /dev/loop0 1G Formatting '/dev/loop0', fmt=raw size=1073741824 qemu-img: /dev/loop0: Failed to clear the new image's first sector: Invalid argument Use the pwrite_zeroes_alignment block limit to avoid misaligned fallocate(2) or ioctl(BLKZEROOUT) in the block/file-posix.c block driver. Cc: qemu-stable@nongnu.org Fixes: 5634622bcb ("file-posix: allow BLKZEROOUT with -t writeback") Reported-by: Jean-Louis Dupond <jean-louis@dupond.be> Buglink: https://gitlab.com/qemu-project/qemu/-/issues/3127 Reviewed-by: Vladimir Sementsov-Ogievskiy <vsementsov@yandex-team.ru> Signed-off-by: Stefan Hajnoczi <stefanha@redhat.com> Message-ID: <20251007141700.71891-3-stefanha@redhat.com> Tested-by: Fiona Ebner <f.ebner@proxmox.com> Reviewed-by: Fiona Ebner <f.ebner@proxmox.com> Reviewed-by: Kevin Wolf <kwolf@redhat.com> Signed-off-by: Kevin Wolf <kwolf@redhat.com>		2 days ago
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accel-blocker.h	…
accel-irq.h	hw/intc: Generalize APIC helper names from kvm_* to accel_*	2 months ago
address-spaces.h	include/system: Move exec/address-spaces.h to system/address-spaces.h	7 months ago
arch_init.h	system: Replace arch_type global by qemu_arch_available() helper	9 months ago
balloon.h	…
block-backend-common.h	…
block-backend-global-state.h	block-backend: mark blk_io_limits_disable() as GRAPH_UNLOCKED	5 months ago
block-backend-io.h	block: use pwrite_zeroes_alignment when writing first sector	2 days ago
block-backend.h	…
block-ram-registrar.h	…
blockdev.h	…
confidential-guest-support.h	backends/confidential-guest-support: Add set_guest_policy() function	5 months ago
cpu-throttle.h	…
cpu-timers-internal.h	…
cpu-timers.h	include/exec: Split out icount.h	7 months ago
cpus.h	bsd-user, linux-user: introduce qemu_process_cpu_events	2 months ago
cryptodev-vhost-user.h	…
cryptodev-vhost.h	…
cryptodev.h	…
device_tree.h	hw: Centralize handling of -machine dumpdtb option	9 months ago
dirtylimit.h	…
dirtyrate.h	…
dma.h	include/system: Move exec/address-spaces.h to system/address-spaces.h	7 months ago
dump-arch.h	…
dump.h	…
event-loop-base.h	…
host_iommu_device.h	vfio/iommufd: Save vendor specific device info	6 months ago
hostmem.h	include/system: Move exec/memory.h to system/memory.h	7 months ago
hvf.h	accel/hvf: Restrict internal declarations	5 months ago
hvf_int.h	accel/hvf: Restrict ARM specific fields of AccelCPUState	4 weeks ago
hw_accel.h	qapi/accel: Allow to query mshv capabilities	2 months ago
igvm-cfg.h	sev: Provide sev_features flags from IGVM VMSA to KVM_SEV_INIT2	5 months ago
igvm.h	igvm: add support for initial register state load in native mode	3 weeks ago
iommufd.h	system/iommufd: Use uint64_t type for IOVA mapping size	2 months ago
ioport.h	include/system: Move exec/ioport.h to system/ioport.h	7 months ago
iothread.h	…
kvm.h	accel/kvm: Introduce KvmPutState enum	1 month ago
kvm_int.h	accel: Extract AccelClass definition to 'accel/accel-ops.h'	4 months ago
kvm_xen.h	…
memory.h	system/physmem: Pass address space argument to cpu_flush_icache_range()	2 months ago
memory_mapping.h	…
mshv.h	target/i386/mshv: Implement mshv_store_regs()	2 months ago
mshv_int.h	target/i386/mshv: Use preallocated page for hvcall	2 months ago
numa.h	…
nvmm.h	accel/nvmm: Expose nvmm_enabled() to common code	5 months ago
os-posix.h	os: add an ability to lock memory on_fault	10 months ago
os-wasm.h	include/qemu/osdep.h: Add Emscripten-specific OS dependencies	7 months ago
os-win32.h	error: Kill @error_warn	2 months ago
physmem.h	system/physmem: Extract API out of 'system/ram_addr.h' header	2 months ago
qtest.h	char: rename CharBackend->CharFrontend	4 weeks ago
ram_addr.h	system/physmem: Extract API out of 'system/ram_addr.h' header	2 months ago
ramblock.h	system/ramblock: Move RAMBlock helpers out of "system/ram_addr.h"	2 months ago
replay.h	audio: move audio.h under include/qemu/	4 weeks ago
reset.h	…
rng-random.h	…
rng.h	…
rtc.h	…
runstate-action.h	…
runstate.h	Accelerators patches	4 months ago
seccomp.h	…
spdm-socket.h	spdm: define SPDM transport enum types	4 weeks ago
stats.h	…
system.h	system: drop the -old-param option	2 months ago
tcg.h	tcg: Move qemu_tcg_mttcg_enabled() to 'system/tcg.h'	7 months ago
tpm.h	…
tpm_backend.h	…
tpm_util.h	…
vhost-user-backend.h	char: rename CharBackend->CharFrontend	4 weeks ago
watchdog.h	…
whpx.h	accel/whpx: Expose whpx_enabled() to common code	5 months ago
xen-mapcache.h	system/xen: remove inline stubs	7 months ago
xen.h	meson: Only allow CONFIG_USER_ONLY from certain source sets	7 months ago