fs/ext2/xattr_user.c

0001 // SPDX-License-Identifier: GPL-2.0
0002 /*
0003  * linux/fs/ext2/xattr_user.c
0004  * Handler for extended user attributes.
0005  *
0006  * Copyright (C) 2001 by Andreas Gruenbacher, <a.gruenbacher@computer.org>
0007  */
0008
0009 #include <linux/init.h>
0010 #include <linux/string.h>
0011 #include "ext2.h"
0012 #include "xattr.h"
0013
0014 static bool
0015 ext2_xattr_user_list(struct dentry *dentry)
0016 {
0017     return test_opt(dentry->d_sb, XATTR_USER);
0018 }
0019
0020 static int
0021 ext2_xattr_user_get(const struct xattr_handler *handler,
0022             struct dentry *unused, struct inode *inode,
0023             const char *name, void *buffer, size_t size)
0024 {
0025     if (!test_opt(inode->i_sb, XATTR_USER))
0026         return -EOPNOTSUPP;
0027     return ext2_xattr_get(inode, EXT2_XATTR_INDEX_USER,
0028                   name, buffer, size);
0029 }
0030
0031 static int
0032 ext2_xattr_user_set(const struct xattr_handler *handler,
0033             struct user_namespace *mnt_userns,
0034             struct dentry *unused, struct inode *inode,
0035             const char *name, const void *value,
0036             size_t size, int flags)
0037 {
0038     if (!test_opt(inode->i_sb, XATTR_USER))
0039         return -EOPNOTSUPP;
0040
0041     return ext2_xattr_set(inode, EXT2_XATTR_INDEX_USER,
0042                   name, value, size, flags);
0043 }
0044
0045 const struct xattr_handler ext2_xattr_user_handler = {
0046     .prefix = XATTR_USER_PREFIX,
0047     .list   = ext2_xattr_user_list,
0048     .get    = ext2_xattr_user_get,
0049     .set    = ext2_xattr_user_set,
0050 };