diff options
| author | Miklos Szeredi <mszeredi@suse.cz> | 2014-04-28 14:19:23 +0200 |
|---|---|---|
| committer | Miklos Szeredi <mszeredi@suse.cz> | 2014-04-28 14:19:23 +0200 |
| commit | e27c9d3877a0d0479711a55f5cdd7ee91442da53 (patch) | |
| tree | 5313ae3779a436d92b042c7584986c1f6f06afd4 /include/uapi | |
| parent | 1e18bda86e2dcc4ecb176213ee34649c93ad1396 (diff) | |
| download | lwn-e27c9d3877a0d0479711a55f5cdd7ee91442da53.tar.gz lwn-e27c9d3877a0d0479711a55f5cdd7ee91442da53.zip | |
fuse: fuse: add time_gran to INIT_OUT
Allow userspace fs to specify time granularity.
This is needed because with writeback_cache mode the kernel is responsible
for generating mtime and ctime, but if the underlying filesystem doesn't
support nanosecond granularity then the cache will contain a different
value from the one stored on the filesystem resulting in a change of times
after a cache flush.
Make the default granularity 1s.
Signed-off-by: Miklos Szeredi <mszeredi@suse.cz>
Diffstat (limited to 'include/uapi')
| -rw-r--r-- | include/uapi/linux/fuse.h | 7 |
1 files changed, 7 insertions, 0 deletions
diff --git a/include/uapi/linux/fuse.h b/include/uapi/linux/fuse.h index cf4750e1bb49..d1b4e2ca9672 100644 --- a/include/uapi/linux/fuse.h +++ b/include/uapi/linux/fuse.h @@ -96,6 +96,8 @@ * * 7.23 * - add FUSE_WRITEBACK_CACHE + * - add time_gran to fuse_init_out + * - add reserved space to fuse_init_out */ #ifndef _LINUX_FUSE_H @@ -559,6 +561,9 @@ struct fuse_init_in { uint32_t flags; }; +#define FUSE_COMPAT_INIT_OUT_SIZE 8 +#define FUSE_COMPAT_22_INIT_OUT_SIZE 24 + struct fuse_init_out { uint32_t major; uint32_t minor; @@ -567,6 +572,8 @@ struct fuse_init_out { uint16_t max_background; uint16_t congestion_threshold; uint32_t max_write; + uint32_t time_gran; + uint32_t unused[9]; }; #define CUSE_INIT_INFO_MAX 4096 |