Hanna Czenczek 1703eb1c27 block/fuse: Let PUNCH_HOLE write zeroes ... fallocate(2) says about PUNCH_HOLE: "After a successful call, subsequent reads from this range will return zeros." As it is, PUNCH_HOLE is implemented as a call to blk_pdiscard(), which does not guarantee this. We must call blk_pwrite_zeroes() instead. The difference to ZERO_RANGE is that we pass the `BDRV_REQ_MAY_UNMAP | BDRV_REQ_NO_FALLBACK` flags to the call -- the storage is supposed to be unmapped, and a slow fallback by actually writing zeroes as data is not allowed. Closes: https://gitlab.com/qemu-project/qemu/-/issues/1507 Signed-off-by: Hanna Czenczek <hreitz@redhat.com> Message-Id: <20230227104725.33511-2-hreitz@redhat.com> Reviewed-by: Kevin Wolf <kwolf@redhat.com> Signed-off-by: Kevin Wolf <kwolf@redhat.com>		2023-03-10 15:14:46 +01:00
..
export.c	qapi block: Elide redundant has_FOO in generated C	2022-12-14 20:03:25 +01:00
fuse.c	block/fuse: Let PUNCH_HOLE write zeroes	2023-03-10 15:14:46 +01:00
meson.build	vduse-blk: Implement vduse-blk export	2022-06-24 17:07:06 +02:00
vduse-blk.c	Fix non-first inclusions of qemu/osdep.h	2023-02-08 07:28:05 +01:00
vduse-blk.h	vduse-blk: Implement vduse-blk export	2022-06-24 17:07:06 +02:00
vhost-user-blk-server.c	vduse-blk: Add serial option	2022-06-24 17:07:06 +02:00
vhost-user-blk-server.h	block/export: convert vhost-user-blk server to block export API	2020-10-23 13:42:16 +01:00
virtio-blk-handler.c	block/export: Abstract out the logic of virtio-blk I/O process	2022-06-24 17:07:06 +02:00
virtio-blk-handler.h	vduse-blk: Add serial option	2022-06-24 17:07:06 +02:00