1 // SPDX-License-Identifier: GPL-2.0 2 #include "reiserfs.h" 3 #include <linux/capability.h> 4 #include <linux/errno.h> 5 #include <linux/fs.h> 6 #include <linux/pagemap.h> 7 #include <linux/xattr.h> 8 #include "xattr.h" 9 #include <linux/uaccess.h> 10 11 static int 12 trusted_get(const struct xattr_handler *handler, struct dentry *unused, 13 struct inode *inode, const char *name, void *buffer, size_t size) 14 { 15 if (!capable(CAP_SYS_ADMIN) || IS_PRIVATE(inode)) 16 return -EPERM; 17 18 return reiserfs_xattr_get(inode, xattr_full_name(handler, name), 19 buffer, size); 20 } 21 22 static int 23 trusted_set(const struct xattr_handler *handler, 24 struct user_namespace *mnt_userns, struct dentry *unused, 25 struct inode *inode, const char *name, const void *buffer, 26 size_t size, int flags) 27 { 28 if (!capable(CAP_SYS_ADMIN) || IS_PRIVATE(inode)) 29 return -EPERM; 30 31 return reiserfs_xattr_set(inode, 32 xattr_full_name(handler, name), 33 buffer, size, flags); 34 } 35 36 static bool trusted_list(struct dentry *dentry) 37 { 38 return capable(CAP_SYS_ADMIN) && !IS_PRIVATE(d_inode(dentry)); 39 } 40 41 const struct xattr_handler reiserfs_xattr_trusted_handler = { 42 .prefix = XATTR_TRUSTED_PREFIX, 43 .get = trusted_get, 44 .set = trusted_set, 45 .list = trusted_list, 46 }; 47