[PATCH 10/12] ocfs2: drop posix acl handlers

[Christian Brauner <brauner@kernel.org>]

Last cycle we introduced a new posix acl api. Filesystems now only need
to implement the inode operations for posix acls. The generic xattr
handlers aren't used anymore by the vfs and will be completely removed.
Keeping the handler around is confusing and gives the false impression
that the xattr infrastructure of the vfs is used to interact with posix
acls when it really isn't anymore.

For this to work we simply rework the ->listxattr() inode operation to
not rely on the generix posix acl handlers anymore.

Cc: <ocfs2-devel@oss.oracle.com>
Signed-off-by: Christian Brauner (Microsoft) <brauner@kernel.org>
---
 fs/ocfs2/xattr.c | 41 +++++++++++++++++++++++++----------------
 1 file changed, 25 insertions(+), 16 deletions(-)

diff --git a/fs/ocfs2/xattr.c b/fs/ocfs2/xattr.c
index 95d0611c5fc7..e55cd11d72fc 100644
--- a/fs/ocfs2/xattr.c
+++ b/fs/ocfs2/xattr.c
@@ -89,23 +89,11 @@ static struct ocfs2_xattr_def_value_root def_xv = {
 
 const struct xattr_handler *ocfs2_xattr_handlers[] = {
 	&ocfs2_xattr_user_handler,
-	&posix_acl_access_xattr_handler,
-	&posix_acl_default_xattr_handler,
 	&ocfs2_xattr_trusted_handler,
 	&ocfs2_xattr_security_handler,
 	NULL
 };
 
-static const struct xattr_handler *ocfs2_xattr_handler_map[OCFS2_XATTR_MAX] = {
-	[OCFS2_XATTR_INDEX_USER]	= &ocfs2_xattr_user_handler,
-	[OCFS2_XATTR_INDEX_POSIX_ACL_ACCESS]
-					= &posix_acl_access_xattr_handler,
-	[OCFS2_XATTR_INDEX_POSIX_ACL_DEFAULT]
-					= &posix_acl_default_xattr_handler,
-	[OCFS2_XATTR_INDEX_TRUSTED]	= &ocfs2_xattr_trusted_handler,
-	[OCFS2_XATTR_INDEX_SECURITY]	= &ocfs2_xattr_security_handler,
-};
-
 struct ocfs2_xattr_info {
 	int		xi_name_index;
 	const char	*xi_name;
@@ -528,13 +516,34 @@ static int ocfs2_read_xattr_block(struct inode *inode, u64 xb_blkno,
 	return rc;
 }
 
-static inline const char *ocfs2_xattr_prefix(int name_index)
+static const char *ocfs2_xattr_prefix(int xattr_index)
 {
+	const char *name = NULL;
 	const struct xattr_handler *handler = NULL;
 
-	if (name_index > 0 && name_index < OCFS2_XATTR_MAX)
-		handler = ocfs2_xattr_handler_map[name_index];
-	return handler ? xattr_prefix(handler) : NULL;
+	switch (xattr_index) {
+	case OCFS2_XATTR_INDEX_USER:
+		handler = &ocfs2_xattr_user_handler;
+		break;
+	case OCFS2_XATTR_INDEX_TRUSTED:
+		handler = &ocfs2_xattr_trusted_handler;
+		break;
+	case OCFS2_XATTR_INDEX_SECURITY:
+		handler = &ocfs2_xattr_security_handler;
+		break;
+	case OCFS2_XATTR_INDEX_POSIX_ACL_ACCESS:
+		name = XATTR_NAME_POSIX_ACL_ACCESS;
+		break;
+	case OCFS2_XATTR_INDEX_POSIX_ACL_DEFAULT:
+		name = XATTR_NAME_POSIX_ACL_DEFAULT;
+		break;
+	default:
+		return NULL;
+	}
+
+	name = xattr_prefix(handler);
+
+	return name;
 }
 
 static u32 ocfs2_xattr_name_hash(struct inode *inode,

-- 
2.34.1