[PATCH] FUSE: pass file handle in setattr

This patch passes the file handle supplied in iattr to userspace, in case the
->setattr() was invoked from sys_ftruncate().  This solves the permission
checking (or lack thereof) in ftruncate() for the class of filesystems served
by an unprivileged userspace process.

Signed-off-by: Miklos Szeredi <miklos@szeredi.hu>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>

1 files changed, 15 insertions, 1 deletions

diff --git a/include/linux/fuse.h b/include/linux/fuse.h
index 45c398f08247..b76b558b03d4 100644
--- a/include/linux/fuse.h
+++ b/include/linux/fuse.h
@@ -61,6 +61,7 @@ struct fuse_kstatfs {
 #define FATTR_SIZE      (1 << 3)
 #define FATTR_ATIME     (1 << 4)
 #define FATTR_MTIME     (1 << 5)
+#define FATTR_FH        (1 << 6)
 
 /**
  * Flags returned by the OPEN request
@@ -154,7 +155,20 @@ struct fuse_link_in {
 struct fuse_setattr_in {
         __u32   valid;
         __u32   padding;
-        struct fuse_attr attr;
+        __u64   fh;
+        __u64   size;
+        __u64   unused1;
+        __u64   atime;
+        __u64   mtime;
+        __u64   unused2;
+        __u32   atimensec;
+        __u32   mtimensec;
+        __u32   unused3;
+        __u32   mode;
+        __u32   unused4;
+        __u32   uid;
+        __u32   gid;
+        __u32   unused5;
 };
 
 struct fuse_open_in {