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| author | Max Reitz <mreitz@redhat.com> | 2019-02-01 20:29:18 +0100 |
|---|---|---|
| committer | Max Reitz <mreitz@redhat.com> | 2019-02-25 15:11:26 +0100 |
| commit | 1e89d0f9bed7e95278d151cf6308cafbba8dae9f (patch) | |
| tree | 77a82dc50b4d4610018eba8005bab113537f84a6 /include/block/block_int.h | |
| parent | 2d9158ce79f8d9ca45c74bc496b483e95b4a398c (diff) | |
| download | qemu-1e89d0f9bed7e95278d151cf6308cafbba8dae9f.zip qemu-1e89d0f9bed7e95278d151cf6308cafbba8dae9f.tar.gz qemu-1e89d0f9bed7e95278d151cf6308cafbba8dae9f.tar.bz2 | |
block: Add bdrv_dirname()
This function may be implemented by block drivers to derive a directory
name from a BDS. Concatenating this g_free()-able string with a relative
filename must result in a valid (not necessarily existing) filename, so
this is a function that should generally be not implemented by format
drivers, because this is protocol-specific.
If a BDS's driver does not implement this function, bdrv_dirname() will
fall through to the BDS's file if it exists. If it does not, the
exact_filename field will be used to generate a directory name.
Signed-off-by: Max Reitz <mreitz@redhat.com>
Reviewed-by: Alberto Garcia <berto@igalia.com>
Message-id: 20190201192935.18394-15-mreitz@redhat.com
Signed-off-by: Max Reitz <mreitz@redhat.com>
Diffstat (limited to 'include/block/block_int.h')
| -rw-r--r-- | include/block/block_int.h | 7 |
1 files changed, 7 insertions, 0 deletions
diff --git a/include/block/block_int.h b/include/block/block_int.h index dd7276c..e4d4817 100644 --- a/include/block/block_int.h +++ b/include/block/block_int.h @@ -141,6 +141,13 @@ struct BlockDriver { void (*bdrv_refresh_filename)(BlockDriverState *bs, QDict *options); + /* + * Returns an allocated string which is the directory name of this BDS: It + * will be used to make relative filenames absolute by prepending this + * function's return value to them. + */ + char *(*bdrv_dirname)(BlockDriverState *bs, Error **errp); + /* aio */ BlockAIOCB *(*bdrv_aio_preadv)(BlockDriverState *bs, uint64_t offset, uint64_t bytes, QEMUIOVector *qiov, int flags, |