[PATCH v2 8/8] fs: rename generic posix acl handlers

[Christian Brauner <brauner@kernel.org>]

Reflect in their naming and document that they are kept around for
legacy reasons and shouldn't be used anymore by new code.

Signed-off-by: Christian Brauner (Microsoft) <brauner@kernel.org>
---
Changes in v2:
- Patch introduced.
---
 fs/erofs/xattr.h                |  6 ++----
 fs/ext2/xattr.c                 |  4 ++--
 fs/ext4/xattr.c                 |  4 ++--
 fs/f2fs/xattr.c                 |  4 ++--
 fs/jffs2/xattr.c                |  4 ++--
 fs/ocfs2/xattr.c                | 12 +++++-------
 fs/posix_acl.c                  | 24 ++++++++++++++++++------
 fs/reiserfs/xattr.c             |  4 ++--
 include/linux/posix_acl_xattr.h |  5 +++--
 9 files changed, 38 insertions(+), 29 deletions(-)

diff --git a/fs/erofs/xattr.h b/fs/erofs/xattr.h
index 08658e414c33..97185cb649b6 100644
--- a/fs/erofs/xattr.h
+++ b/fs/erofs/xattr.h
@@ -49,10 +49,8 @@ static inline const char *erofs_xattr_prefix(unsigned int idx,
 	static const struct xattr_handler *xattr_handler_map[] = {
 		[EROFS_XATTR_INDEX_USER] = &erofs_xattr_user_handler,
 #ifdef CONFIG_EROFS_FS_POSIX_ACL
-		[EROFS_XATTR_INDEX_POSIX_ACL_ACCESS] =
-			&posix_acl_access_xattr_handler,
-		[EROFS_XATTR_INDEX_POSIX_ACL_DEFAULT] =
-			&posix_acl_default_xattr_handler,
+		[EROFS_XATTR_INDEX_POSIX_ACL_ACCESS] = &nop_posix_acl_access,
+		[EROFS_XATTR_INDEX_POSIX_ACL_DEFAULT] = &nop_posix_acl_default,
 #endif
 		[EROFS_XATTR_INDEX_TRUSTED] = &erofs_xattr_trusted_handler,
 #ifdef CONFIG_EROFS_FS_SECURITY
diff --git a/fs/ext2/xattr.c b/fs/ext2/xattr.c
index 958976f809f5..b126af5f8b15 100644
--- a/fs/ext2/xattr.c
+++ b/fs/ext2/xattr.c
@@ -101,8 +101,8 @@ static void ext2_xattr_rehash(struct ext2_xattr_header *,
 static const struct xattr_handler *ext2_xattr_handler_map[] = {
 	[EXT2_XATTR_INDEX_USER]		     = &ext2_xattr_user_handler,
 #ifdef CONFIG_EXT2_FS_POSIX_ACL
-	[EXT2_XATTR_INDEX_POSIX_ACL_ACCESS]  = &posix_acl_access_xattr_handler,
-	[EXT2_XATTR_INDEX_POSIX_ACL_DEFAULT] = &posix_acl_default_xattr_handler,
+	[EXT2_XATTR_INDEX_POSIX_ACL_ACCESS]  = &nop_posix_acl_access,
+	[EXT2_XATTR_INDEX_POSIX_ACL_DEFAULT] = &nop_posix_acl_default,
 #endif
 	[EXT2_XATTR_INDEX_TRUSTED]	     = &ext2_xattr_trusted_handler,
 #ifdef CONFIG_EXT2_FS_SECURITY
diff --git a/fs/ext4/xattr.c b/fs/ext4/xattr.c
index 3fbeeb00fd78..edca79a62bd9 100644
--- a/fs/ext4/xattr.c
+++ b/fs/ext4/xattr.c
@@ -88,8 +88,8 @@ static void ext4_xattr_rehash(struct ext4_xattr_header *);
 static const struct xattr_handler * const ext4_xattr_handler_map[] = {
 	[EXT4_XATTR_INDEX_USER]		     = &ext4_xattr_user_handler,
 #ifdef CONFIG_EXT4_FS_POSIX_ACL
-	[EXT4_XATTR_INDEX_POSIX_ACL_ACCESS]  = &posix_acl_access_xattr_handler,
-	[EXT4_XATTR_INDEX_POSIX_ACL_DEFAULT] = &posix_acl_default_xattr_handler,
+	[EXT4_XATTR_INDEX_POSIX_ACL_ACCESS]  = &nop_posix_acl_access,
+	[EXT4_XATTR_INDEX_POSIX_ACL_DEFAULT] = &nop_posix_acl_default,
 #endif
 	[EXT4_XATTR_INDEX_TRUSTED]	     = &ext4_xattr_trusted_handler,
 #ifdef CONFIG_EXT4_FS_SECURITY
diff --git a/fs/f2fs/xattr.c b/fs/f2fs/xattr.c
index 9de984645253..7eb9628478c8 100644
--- a/fs/f2fs/xattr.c
+++ b/fs/f2fs/xattr.c
@@ -192,8 +192,8 @@ const struct xattr_handler f2fs_xattr_security_handler = {
 static const struct xattr_handler *f2fs_xattr_handler_map[] = {
 	[F2FS_XATTR_INDEX_USER] = &f2fs_xattr_user_handler,
 #ifdef CONFIG_F2FS_FS_POSIX_ACL
-	[F2FS_XATTR_INDEX_POSIX_ACL_ACCESS] = &posix_acl_access_xattr_handler,
-	[F2FS_XATTR_INDEX_POSIX_ACL_DEFAULT] = &posix_acl_default_xattr_handler,
+	[F2FS_XATTR_INDEX_POSIX_ACL_ACCESS] = &nop_posix_acl_access,
+	[F2FS_XATTR_INDEX_POSIX_ACL_DEFAULT] = &nop_posix_acl_default,
 #endif
 	[F2FS_XATTR_INDEX_TRUSTED] = &f2fs_xattr_trusted_handler,
 #ifdef CONFIG_F2FS_FS_SECURITY
diff --git a/fs/jffs2/xattr.c b/fs/jffs2/xattr.c
index 1189a70d2007..aa4048a27f31 100644
--- a/fs/jffs2/xattr.c
+++ b/fs/jffs2/xattr.c
@@ -939,10 +939,10 @@ static const char *jffs2_xattr_prefix(int xprefix, struct dentry *dentry)
 #endif
 #ifdef CONFIG_JFFS2_FS_POSIX_ACL
 	case JFFS2_XPREFIX_ACL_ACCESS:
-		ret = &posix_acl_access_xattr_handler;
+		ret = &nop_posix_acl_access;
 		break;
 	case JFFS2_XPREFIX_ACL_DEFAULT:
-		ret = &posix_acl_default_xattr_handler;
+		ret = &nop_posix_acl_default;
 		break;
 #endif
 	case JFFS2_XPREFIX_TRUSTED:
diff --git a/fs/ocfs2/xattr.c b/fs/ocfs2/xattr.c
index 482b2ef7ca54..ff85e418d7e3 100644
--- a/fs/ocfs2/xattr.c
+++ b/fs/ocfs2/xattr.c
@@ -95,13 +95,11 @@ const struct xattr_handler *ocfs2_xattr_handlers[] = {
 };
 
 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,
+	[OCFS2_XATTR_INDEX_USER]		= &ocfs2_xattr_user_handler,
+	[OCFS2_XATTR_INDEX_POSIX_ACL_ACCESS]	= &nop_posix_acl_access,
+	[OCFS2_XATTR_INDEX_POSIX_ACL_DEFAULT]	= &nop_posix_acl_default,
+	[OCFS2_XATTR_INDEX_TRUSTED]		= &ocfs2_xattr_trusted_handler,
+	[OCFS2_XATTR_INDEX_SECURITY]		= &ocfs2_xattr_security_handler,
 };
 
 struct ocfs2_xattr_info {
diff --git a/fs/posix_acl.c b/fs/posix_acl.c
index d5e9db0e4d66..e78b0cc56c6b 100644
--- a/fs/posix_acl.c
+++ b/fs/posix_acl.c
@@ -989,19 +989,31 @@ posix_acl_xattr_list(struct dentry *dentry)
 	return IS_POSIXACL(d_backing_inode(dentry));
 }
 
-const struct xattr_handler posix_acl_access_xattr_handler = {
+/*
+ * nop_posix_acl_access - legacy xattr handler for access POSIX ACLs
+ *
+ * This is the legacy POSIX ACL access xattr handler. It is used by some
+ * filesystems to implement their ->listxattr() inode operation. New code
+ * should never use them.
+ */
+const struct xattr_handler nop_posix_acl_access = {
 	.name = XATTR_NAME_POSIX_ACL_ACCESS,
-	.flags = ACL_TYPE_ACCESS,
 	.list = posix_acl_xattr_list,
 };
-EXPORT_SYMBOL_GPL(posix_acl_access_xattr_handler);
+EXPORT_SYMBOL_GPL(nop_posix_acl_access);
 
-const struct xattr_handler posix_acl_default_xattr_handler = {
+/*
+ * nop_posix_acl_default - legacy xattr handler for default POSIX ACLs
+ *
+ * This is the legacy POSIX ACL default xattr handler. It is used by some
+ * filesystems to implement their ->listxattr() inode operation. New code
+ * should never use them.
+ */
+const struct xattr_handler nop_posix_acl_default = {
 	.name = XATTR_NAME_POSIX_ACL_DEFAULT,
-	.flags = ACL_TYPE_DEFAULT,
 	.list = posix_acl_xattr_list,
 };
-EXPORT_SYMBOL_GPL(posix_acl_default_xattr_handler);
+EXPORT_SYMBOL_GPL(nop_posix_acl_default);
 
 int simple_set_acl(struct user_namespace *mnt_userns, struct dentry *dentry,
 		   struct posix_acl *acl, int type)
diff --git a/fs/reiserfs/xattr.c b/fs/reiserfs/xattr.c
index 66574fcbe7a9..ff95d55c4c2c 100644
--- a/fs/reiserfs/xattr.c
+++ b/fs/reiserfs/xattr.c
@@ -773,8 +773,8 @@ reiserfs_xattr_get(struct inode *inode, const char *name, void *buffer,
 
 static const struct xattr_handler *reiserfs_xattr_handlers_max[] = {
 #ifdef CONFIG_REISERFS_FS_POSIX_ACL
-	&posix_acl_access_xattr_handler,
-	&posix_acl_default_xattr_handler,
+	&nop_posix_acl_access,
+	&nop_posix_acl_default,
 #endif
 #ifdef CONFIG_REISERFS_FS_XATTR
 	&reiserfs_xattr_user_handler,
diff --git a/include/linux/posix_acl_xattr.h b/include/linux/posix_acl_xattr.h
index 54cd7a14330d..e86f3b731da2 100644
--- a/include/linux/posix_acl_xattr.h
+++ b/include/linux/posix_acl_xattr.h
@@ -68,7 +68,8 @@ static inline int posix_acl_type(const char *name)
 	return -1;
 }
 
-extern const struct xattr_handler posix_acl_access_xattr_handler;
-extern const struct xattr_handler posix_acl_default_xattr_handler;
+/* These are legacy handlers. Don't use them for new code. */
+extern const struct xattr_handler nop_posix_acl_access;
+extern const struct xattr_handler nop_posix_acl_default;
 
 #endif	/* _POSIX_ACL_XATTR_H */

-- 
2.34.1