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| 1 | /* SPDX-License-Identifier: GPL-2.0 */ |
|---|---|
| 2 | /* |
| 3 | * evm.h |
| 4 | * |
| 5 | * Copyright (c) 2009 IBM Corporation |
| 6 | * Author: Mimi Zohar <zohar@us.ibm.com> |
| 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 | extern bool evm_metadata_changed(struct inode *inode, |
| 30 | struct inode *metadata_inode); |
| 31 | #ifdef CONFIG_FS_POSIX_ACL |
| 32 | extern int posix_xattr_acl(const char *xattrname); |
| 33 | #else |
| 34 | static inline int posix_xattr_acl(const char *xattrname) |
| 35 | { |
| 36 | return 0; |
| 37 | } |
| 38 | #endif |
| 39 | #else |
| 40 | |
| 41 | static inline int evm_set_key(void *key, size_t keylen) |
| 42 | { |
| 43 | return -EOPNOTSUPP; |
| 44 | } |
| 45 | |
| 46 | #ifdef CONFIG_INTEGRITY |
| 47 | static inline enum integrity_status evm_verifyxattr(struct dentry *dentry, |
| 48 | const char *xattr_name, |
| 49 | void *xattr_value, |
| 50 | size_t xattr_value_len) |
| 51 | { |
| 52 | return INTEGRITY_UNKNOWN; |
| 53 | } |
| 54 | #endif |
| 55 | |
| 56 | static inline int evm_inode_init_security(struct inode *inode, struct inode *dir, |
| 57 | const struct qstr *qstr, |
| 58 | struct xattr *xattrs, |
| 59 | int *xattr_count) |
| 60 | { |
| 61 | return 0; |
| 62 | } |
| 63 | |
| 64 | static inline bool evm_revalidate_status(const char *xattr_name) |
| 65 | { |
| 66 | return false; |
| 67 | } |
| 68 | |
| 69 | static inline int evm_protected_xattr_if_enabled(const char *req_xattr_name) |
| 70 | { |
| 71 | return false; |
| 72 | } |
| 73 | |
| 74 | static inline int evm_read_protected_xattrs(struct dentry *dentry, u8 *buffer, |
| 75 | int buffer_size, char type, |
| 76 | bool canonical_fmt) |
| 77 | { |
| 78 | return -EOPNOTSUPP; |
| 79 | } |
| 80 | |
| 81 | static inline bool evm_metadata_changed(struct inode *inode, |
| 82 | struct inode *metadata_inode) |
| 83 | { |
| 84 | return false; |
| 85 | } |
| 86 | |
| 87 | #endif /* CONFIG_EVM */ |
| 88 | #endif /* LINUX_EVM_H */ |
| 89 |
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