xattr: simplify listxattr helpers
The generic_listxattr() and simple_xattr_list() helpers list xattrs and
contain duplicated code. Add two helpers that both generic_listxattr()
and simple_xattr_list() can use.
Reviewed-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: Christian Brauner (Microsoft) <brauner@kernel.org>
diff --git a/fs/posix_acl.c b/fs/posix_acl.c
index 5a76fb3..b350e83 100644
--- a/fs/posix_acl.c
+++ b/fs/posix_acl.c
@@ -957,6 +957,31 @@ set_posix_acl(struct mnt_idmap *idmap, struct dentry *dentry,
}
EXPORT_SYMBOL(set_posix_acl);
+int posix_acl_listxattr(struct inode *inode, char **buffer,
+ ssize_t *remaining_size)
+{
+ int err;
+
+ if (!IS_POSIXACL(inode))
+ return 0;
+
+ if (inode->i_acl) {
+ err = xattr_list_one(buffer, remaining_size,
+ XATTR_NAME_POSIX_ACL_ACCESS);
+ if (err)
+ return err;
+ }
+
+ if (inode->i_default_acl) {
+ err = xattr_list_one(buffer, remaining_size,
+ XATTR_NAME_POSIX_ACL_DEFAULT);
+ if (err)
+ return err;
+ }
+
+ return 0;
+}
+
static bool
posix_acl_xattr_list(struct dentry *dentry)
{
