diff options
| author | Max Reitz | 2019-09-18 11:51:40 +0200 |
|---|---|---|
| committer | Max Reitz | 2019-10-28 12:00:07 +0100 |
| commit | c80d8b06cfa59f5d8229379c85dcb2c3bb9c881b (patch) | |
| tree | 0e30acba1187e0e5ccfaaf6324dc46431b6691af /include/sysemu | |
| parent | block: Do not truncate file node when formatting (diff) | |
| download | qemu-c80d8b06cfa59f5d8229379c85dcb2c3bb9c881b.tar.gz qemu-c80d8b06cfa59f5d8229379c85dcb2c3bb9c881b.tar.xz qemu-c80d8b06cfa59f5d8229379c85dcb2c3bb9c881b.zip | |
block: Add @exact parameter to bdrv_co_truncate()
We have two drivers (iscsi and file-posix) that (in some cases) return
success from their .bdrv_co_truncate() implementation if the block
device is larger than the requested offset, but cannot be shrunk. Some
callers do not want that behavior, so this patch adds a new parameter
that they can use to turn off that behavior.
This patch just adds the parameter and lets the block/io.c and
block/block-backend.c functions pass it around. All other callers
always pass false and none of the implementations evaluate it, so that
this patch does not change existing behavior. Future patches take care
of that.
Suggested-by: Maxim Levitsky <mlevitsk@redhat.com>
Signed-off-by: Max Reitz <mreitz@redhat.com>
Message-id: 20190918095144.955-5-mreitz@redhat.com
Reviewed-by: Maxim Levitsky <mlevitsk@redhat.com>
Signed-off-by: Max Reitz <mreitz@redhat.com>
Diffstat (limited to 'include/sysemu')
| -rw-r--r-- | include/sysemu/block-backend.h | 4 |
1 files changed, 2 insertions, 2 deletions
diff --git a/include/sysemu/block-backend.h b/include/sysemu/block-backend.h index 73f2cef7fe..b198deca0b 100644 --- a/include/sysemu/block-backend.h +++ b/include/sysemu/block-backend.h @@ -237,8 +237,8 @@ int coroutine_fn blk_co_pwrite_zeroes(BlockBackend *blk, int64_t offset, int bytes, BdrvRequestFlags flags); int blk_pwrite_compressed(BlockBackend *blk, int64_t offset, const void *buf, int bytes); -int blk_truncate(BlockBackend *blk, int64_t offset, PreallocMode prealloc, - Error **errp); +int blk_truncate(BlockBackend *blk, int64_t offset, bool exact, + PreallocMode prealloc, Error **errp); int blk_pdiscard(BlockBackend *blk, int64_t offset, int bytes); int blk_save_vmstate(BlockBackend *blk, const uint8_t *buf, int64_t pos, int size); |