From a9ff4f87056cd31a8232b88d013dc6c9ad719c18 Mon Sep 17 00:00:00 2001 From: Miklos Szeredi Date: Thu, 18 Oct 2007 03:07:02 -0700 Subject: fuse: support BSD locking semantics It is trivial to add support for flock(2) semantics to the existing protocol, by setting the lock owner field to the file pointer, and passing a new FUSE_LK_FLOCK flag with the locking request. Signed-off-by: Miklos Szeredi Signed-off-by: Andrew Morton Signed-off-by: Linus Torvalds --- include/linux/fuse.h | 8 ++++++++ 1 file changed, 8 insertions(+) (limited to 'include') diff --git a/include/linux/fuse.h b/include/linux/fuse.h index 436047093bc..015a8b15a38 100644 --- a/include/linux/fuse.h +++ b/include/linux/fuse.h @@ -13,6 +13,7 @@ * * 7.9: * - new fuse_getattr_in input argument of GETATTR + * - add lk_flags in fuse_lk_in */ #include @@ -113,6 +114,11 @@ struct fuse_file_lock { */ #define FUSE_GETATTR_FH (1 << 0) +/** + * Lock flags + */ +#define FUSE_LK_FLOCK (1 << 0) + enum fuse_opcode { FUSE_LOOKUP = 1, FUSE_FORGET = 2, /* no reply */ @@ -295,6 +301,8 @@ struct fuse_lk_in { __u64 fh; __u64 owner; struct fuse_file_lock lk; + __u32 lk_flags; + __u32 padding; }; struct fuse_lk_out { -- cgit v1.2.3