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, 10 insertions, 8 deletions

diff --git a/fs/jffs2/security.c b/fs/jffs2/security.c
index 02c39c6..eaccee0 100644
--- a/fs/jffs2/security.c
+++ b/fs/jffs2/security.c
@@ -44,26 +44,28 @@ int jffs2_init_security(struct inode *inode, struct inode *dir)
 }
 
 /* ---- XATTR Handler for "security.*" ----------------- */
-static int jffs2_security_getxattr(struct inode *inode, const char *name,
-				   void *buffer, size_t size)
+static int jffs2_security_getxattr(struct dentry *dentry, const char *name,
+				   void *buffer, size_t size, int type)
 {
 	if (!strcmp(name, ""))
 		return -EINVAL;
 
-	return do_jffs2_getxattr(inode, JFFS2_XPREFIX_SECURITY, name, buffer, size);
+	return do_jffs2_getxattr(dentry->d_inode, JFFS2_XPREFIX_SECURITY,
+				 name, buffer, size);
 }
 
-static int jffs2_security_setxattr(struct inode *inode, const char *name, const void *buffer,
-				   size_t size, int flags)
+static int jffs2_security_setxattr(struct dentry *dentry, const char *name,
+		const void *buffer, size_t size, int flags, int type)
 {
 	if (!strcmp(name, ""))
 		return -EINVAL;
 
-	return do_jffs2_setxattr(inode, JFFS2_XPREFIX_SECURITY, name, buffer, size, flags);
+	return do_jffs2_setxattr(dentry->d_inode, JFFS2_XPREFIX_SECURITY,
+				 name, buffer, size, flags);
 }
 
-static size_t jffs2_security_listxattr(struct inode *inode, char *list, size_t list_size,
-				       const char *name, size_t name_len)
+static size_t jffs2_security_listxattr(struct dentry *dentry, char *list,
+		size_t list_size, const char *name, size_t name_len, int type)
 {
 	size_t retlen = XATTR_SECURITY_PREFIX_LEN + name_len + 1;