xattr handlers: Pass handler to operations instead of flags

The xattr_handler operations are currently all passed a file system
specific flags value which the operations can use to disambiguate between
different handlers; some file systems use that to distinguish the xattr
namespace, for example.  In some oprations, it would be useful to also have
access to the handler prefix.  To allow that, pass a pointer to the handler
to operations instead of the flags value alone.

Signed-off-by: Andreas Gruenbacher <agruenba@redhat.com>
Reviewed-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>

1 files changed, 8 insertions, 5 deletions

diff --git a/fs/gfs2/xattr.c b/fs/gfs2/xattr.c
index 4c096fa9e2a1..53ce76a374fe 100644
--- a/fs/gfs2/xattr.c
+++ b/fs/gfs2/xattr.c
@@ -583,11 +583,13 @@ out:
  *
  * Returns: actual size of data on success, -errno on error
  */
-static int gfs2_xattr_get(struct dentry *dentry, const char *name,
-                void *buffer, size_t size, int type)
+static int gfs2_xattr_get(const struct xattr_handler *handler,
+                          struct dentry *dentry, const char *name,
+                          void *buffer, size_t size)
 {
         struct gfs2_inode *ip = GFS2_I(d_inode(dentry));
         struct gfs2_ea_location el;
+        int type = handler->flags;
         int error;
 
         if (!ip->i_eattr)
@@ -1227,11 +1229,12 @@ int __gfs2_xattr_set(struct inode *inode, const char *name,
         return error;
 }
 
-static int gfs2_xattr_set(struct dentry *dentry, const char *name,
-                const void *value, size_t size, int flags, int type)
+static int gfs2_xattr_set(const struct xattr_handler *handler,
+                          struct dentry *dentry, const char *name,
+                          const void *value, size_t size, int flags)
 {
         return __gfs2_xattr_set(d_inode(dentry), name, value,
-                                size, flags, type);
+                                size, flags, handler->flags);
 }