1 // SPDX-License-Identifier: GPL-2.0 2 /* 3 * linux/fs/ext4/xattr_user.c 4 * Handler for extended user attributes. 5 * 6 * Copyright (C) 2001 by Andreas Gruenbacher, <a.gruenbacher@computer.org> 7 */ 8 9 #include <linux/string.h> 10 #include <linux/fs.h> 11 #include "ext4_jbd2.h" 12 #include "ext4.h" 13 #include "xattr.h" 14 15 static bool 16 ext4_xattr_user_list(struct dentry *dentry) 17 { 18 return test_opt(dentry->d_sb, XATTR_USER); 19 } 20 21 static int 22 ext4_xattr_user_get(const struct xattr_handler *handler, 23 struct dentry *unused, struct inode *inode, 24 const char *name, void *buffer, size_t size) 25 { 26 if (!test_opt(inode->i_sb, XATTR_USER)) 27 return -EOPNOTSUPP; 28 return ext4_xattr_get(inode, EXT4_XATTR_INDEX_USER, 29 name, buffer, size); 30 } 31 32 static int 33 ext4_xattr_user_set(const struct xattr_handler *handler, 34 struct user_namespace *mnt_userns, 35 struct dentry *unused, struct inode *inode, 36 const char *name, const void *value, 37 size_t size, int flags) 38 { 39 if (!test_opt(inode->i_sb, XATTR_USER)) 40 return -EOPNOTSUPP; 41 return ext4_xattr_set(inode, EXT4_XATTR_INDEX_USER, 42 name, value, size, flags); 43 } 44 45 const struct xattr_handler ext4_xattr_user_handler = { 46 .prefix = XATTR_USER_PREFIX, 47 .list = ext4_xattr_user_list, 48 .get = ext4_xattr_user_get, 49 .set = ext4_xattr_user_set, 50 }; 51