1 /* SPDX-License-Identifier: GPL-2.0 */ 2 /* 3 * evm.h 4 * 5 * Copyright (c) 2009 IBM Corporation 6 * Author: Mimi Zohar <[email protected]> 7 */ 8 9 #ifndef _LINUX_EVM_H 10 #define _LINUX_EVM_H 11 12 #include <linux/integrity.h> 13 #include <linux/xattr.h> 14 15 #ifdef CONFIG_EVM 16 extern int evm_set_key(void *key, size_t keylen); 17 extern enum integrity_status evm_verifyxattr(struct dentry *dentry, 18 const char *xattr_name, 19 void *xattr_value, 20 size_t xattr_value_len); 21 int evm_inode_init_security(struct inode *inode, struct inode *dir, 22 const struct qstr *qstr, struct xattr *xattrs, 23 int *xattr_count); 24 extern bool evm_revalidate_status(const char *xattr_name); 25 extern int evm_protected_xattr_if_enabled(const char *req_xattr_name); 26 extern int evm_read_protected_xattrs(struct dentry *dentry, u8 *buffer, 27 int buffer_size, char type, 28 bool canonical_fmt); 29 #ifdef CONFIG_FS_POSIX_ACL 30 extern int posix_xattr_acl(const char *xattrname); 31 #else 32 static inline int posix_xattr_acl(const char *xattrname) 33 { 34 return 0; 35 } 36 #endif 37 #else 38 39 static inline int evm_set_key(void *key, size_t keylen) 40 { 41 return -EOPNOTSUPP; 42 } 43 44 #ifdef CONFIG_INTEGRITY 45 static inline enum integrity_status evm_verifyxattr(struct dentry *dentry, 46 const char *xattr_name, 47 void *xattr_value, 48 size_t xattr_value_len) 49 { 50 return INTEGRITY_UNKNOWN; 51 } 52 #endif 53 54 static inline int evm_inode_init_security(struct inode *inode, struct inode *dir, 55 const struct qstr *qstr, 56 struct xattr *xattrs, 57 int *xattr_count) 58 { 59 return 0; 60 } 61 62 static inline bool evm_revalidate_status(const char *xattr_name) 63 { 64 return false; 65 } 66 67 static inline int evm_protected_xattr_if_enabled(const char *req_xattr_name) 68 { 69 return false; 70 } 71 72 static inline int evm_read_protected_xattrs(struct dentry *dentry, u8 *buffer, 73 int buffer_size, char type, 74 bool canonical_fmt) 75 { 76 return -EOPNOTSUPP; 77 } 78 79 #endif /* CONFIG_EVM */ 80 #endif /* LINUX_EVM_H */ 81