1 // SPDX-License-Identifier: GPL-2.0 2 /* 3 * linux/fs/ext4/xattr_trusted.c 4 * Handler for trusted extended attributes. 5 * 6 * Copyright (C) 2003 by Andreas Gruenbacher, <a.gruenbacher@computer.org> 7 */ 8 9 #include <linux/string.h> 10 #include <linux/capability.h> 11 #include <linux/fs.h> 12 #include "ext4_jbd2.h" 13 #include "ext4.h" 14 #include "xattr.h" 15 16 static bool 17 ext4_xattr_trusted_list(struct dentry *dentry) 18 { 19 return capable(CAP_SYS_ADMIN); 20 } 21 22 static int 23 ext4_xattr_trusted_get(const struct xattr_handler *handler, 24 struct dentry *unused, struct inode *inode, 25 const char *name, void *buffer, size_t size) 26 { 27 return ext4_xattr_get(inode, EXT4_XATTR_INDEX_TRUSTED, 28 name, buffer, size); 29 } 30 31 static int 32 ext4_xattr_trusted_set(const struct xattr_handler *handler, 33 struct user_namespace *mnt_userns, 34 struct dentry *unused, struct inode *inode, 35 const char *name, const void *value, 36 size_t size, int flags) 37 { 38 return ext4_xattr_set(inode, EXT4_XATTR_INDEX_TRUSTED, 39 name, value, size, flags); 40 } 41 42 const struct xattr_handler ext4_xattr_trusted_handler = { 43 .prefix = XATTR_TRUSTED_PREFIX, 44 .list = ext4_xattr_trusted_list, 45 .get = ext4_xattr_trusted_get, 46 .set = ext4_xattr_trusted_set, 47 }; 48