sanitize xattr handler prototypes

Add a flags argument to struct xattr_handler and pass it to all xattr
handler methods.  This allows using the same methods for multiple
handlers, e.g. for the ACL methods which perform exactly the same action
for the access and default ACLs, just using a different underlying
attribute.  With a little more groundwork it'll also allow sharing the
methods for the regular user/trusted/secure handlers in extN, ocfs2 and
jffs2 like it's already done for xfs in this patch.

Also change the inode argument to the handlers to a dentry to allow
using the handlers mechnism for filesystems that require it later,
e.g. cifs.

[with GFS2 bits updated by Steven Whitehouse <swhiteho@redhat.com>]

Signed-off-by: Christoph Hellwig <hch@lst.de>
Reviewed-by: James Morris <jmorris@namei.org>
Acked-by: Joel Becker <joel.becker@oracle.com>
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>

1 files changed, 3 insertions, 4 deletions

diff --git a/fs/gfs2/xattr.h b/fs/gfs2/xattr.h
index 8d6ae5813c4d..d392f8358f2f 100644
--- a/fs/gfs2/xattr.h
+++ b/fs/gfs2/xattr.h
@@ -53,10 +53,9 @@ struct gfs2_ea_location {
         struct gfs2_ea_header *el_prev;
 };
 
-extern int gfs2_xattr_get(struct inode *inode, int type, const char *name,
-                          void *buffer, size_t size);
-extern int gfs2_xattr_set(struct inode *inode, int type, const char *name,
-                          const void *value, size_t size, int flags);
+extern int __gfs2_xattr_set(struct inode *inode, const char *name,
+                            const void *value, size_t size,
+                            int flags, int type);
 extern ssize_t gfs2_listxattr(struct dentry *dentry, char *buffer, size_t size);
 extern int gfs2_ea_dealloc(struct gfs2_inode *ip);