1 // SPDX-License-Identifier: GPL-2.0 2 /* 3 * linux/fs/ext2/xattr_security.c 4 * Handler for storing security labels as extended attributes. 5 */ 6 7 #include "ext2.h" 8 #include <linux/security.h> 9 #include "xattr.h" 10 11 static int 12 ext2_xattr_security_get(const struct xattr_handler *handler, 13 struct dentry *unused, struct inode *inode, 14 const char *name, void *buffer, size_t size) 15 { 16 return ext2_xattr_get(inode, EXT2_XATTR_INDEX_SECURITY, name, 17 buffer, size); 18 } 19 20 static int 21 ext2_xattr_security_set(const struct xattr_handler *handler, 22 struct user_namespace *mnt_userns, 23 struct dentry *unused, struct inode *inode, 24 const char *name, const void *value, 25 size_t size, int flags) 26 { 27 return ext2_xattr_set(inode, EXT2_XATTR_INDEX_SECURITY, name, 28 value, size, flags); 29 } 30 31 static int ext2_initxattrs(struct inode *inode, const struct xattr *xattr_array, 32 void *fs_info) 33 { 34 const struct xattr *xattr; 35 int err = 0; 36 37 for (xattr = xattr_array; xattr->name != NULL; xattr++) { 38 err = ext2_xattr_set(inode, EXT2_XATTR_INDEX_SECURITY, 39 xattr->name, xattr->value, 40 xattr->value_len, 0); 41 if (err < 0) 42 break; 43 } 44 return err; 45 } 46 47 int 48 ext2_init_security(struct inode *inode, struct inode *dir, 49 const struct qstr *qstr) 50 { 51 return security_inode_init_security(inode, dir, qstr, 52 &ext2_initxattrs, NULL); 53 } 54 55 const struct xattr_handler ext2_xattr_security_handler = { 56 .prefix = XATTR_SECURITY_PREFIX, 57 .get = ext2_xattr_security_get, 58 .set = ext2_xattr_security_set, 59 }; 60