fuse: pass open flags to read and write

Some open flags (O_APPEND, O_DIRECT) can be changed with fcntl(F_SETFL, ...)
after open, but fuse currently only sends the flags to userspace in open.

To make it possible to correcly handle changing flags, send the
current value to userspace in each read and write.

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>

1 files changed, 5 insertions, 0 deletions

diff --git a/include/linux/fuse.h b/include/linux/fuse.h
index d0c437028c80..5c86f1196c3a 100644
--- a/include/linux/fuse.h
+++ b/include/linux/fuse.h
@@ -16,6 +16,7 @@
  *  - add lk_flags in fuse_lk_in
  *  - add lock_owner field to fuse_setattr_in, fuse_read_in and fuse_write_in
  *  - add blksize field to fuse_attr
+ *  - add file flags field to fuse_read_in and fuse_write_in
  */
 
 #include <asm/types.h>
@@ -280,6 +281,8 @@ struct fuse_read_in {
         __u32   size;
         __u32   read_flags;
         __u64   lock_owner;
+        __u32   flags;
+        __u32   padding;
 };
 
 #define FUSE_COMPAT_WRITE_IN_SIZE 24
@@ -290,6 +293,8 @@ struct fuse_write_in {
         __u32   size;
         __u32   write_flags;
         __u64   lock_owner;
+        __u32   flags;
+        __u32   padding;
 };
 
 struct fuse_write_out {