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authorMiklos Szeredi <mszeredi@suse.cz>2007-10-18 03:07:02 -0700
committerLinus Torvalds <torvalds@woody.linux-foundation.org>2007-10-18 14:37:31 -0700
commita9ff4f87056cd31a8232b88d013dc6c9ad719c18 (patch)
tree8ddcc01ae8b6615a9a530fb51c52825b315ee266 /include/linux/fuse.h
parent6ff958edbf39c014eb06b65ad25b736be08c4e63 (diff)
downloadop-kernel-dev-a9ff4f87056cd31a8232b88d013dc6c9ad719c18.zip
op-kernel-dev-a9ff4f87056cd31a8232b88d013dc6c9ad719c18.tar.gz
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 <mszeredi@suse.cz> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to 'include/linux/fuse.h')
-rw-r--r--include/linux/fuse.h8
1 files changed, 8 insertions, 0 deletions
diff --git a/include/linux/fuse.h b/include/linux/fuse.h
index 4360470..015a8b1 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 <asm/types.h>
@@ -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 {
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