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/* SPDX-License-Identifier: GPL-2.0 */
/*
* evm.h
*
* Copyright (c) 2009 IBM Corporation
* Author: Mimi Zohar <zohar@us.ibm.com>
*/
#ifndef _LINUX_EVM_H
#define _LINUX_EVM_H
#include <linux/integrity.h>
#include <linux/xattr.h>
struct integrity_iint_cache;
#ifdef CONFIG_EVM
extern int evm_set_key(void *key, size_t keylen);
extern enum integrity_status evm_verifyxattr(struct dentry *dentry,
const char *xattr_name,
void *xattr_value,
size_t xattr_value_len,
struct integrity_iint_cache *iint);
extern int evm_inode_setattr(struct mnt_idmap *idmap,
struct dentry *dentry, struct iattr *attr);
extern void evm_inode_post_setattr(struct dentry *dentry, int ia_valid);
extern int evm_inode_setxattr(struct mnt_idmap *idmap,
struct dentry *dentry, const char *name,
const void *value, size_t size);
extern void evm_inode_post_setxattr(struct dentry *dentry,
const char *xattr_name,
const void *xattr_value,
size_t xattr_value_len);
extern int evm_inode_removexattr(struct mnt_idmap *idmap,
struct dentry *dentry, const char *xattr_name);
extern void evm_inode_post_removexattr(struct dentry *dentry,
const char *xattr_name);
static inline void evm_inode_post_remove_acl(struct mnt_idmap *idmap,
struct dentry *dentry,
const char *acl_name)
{
evm_inode_post_removexattr(dentry, acl_name);
}
extern int evm_inode_set_acl(struct mnt_idmap *idmap,
struct dentry *dentry, const char *acl_name,
struct posix_acl *kacl);
static inline int evm_inode_remove_acl(struct mnt_idmap *idmap,
struct dentry *dentry,
const char *acl_name)
{
return evm_inode_set_acl(idmap, dentry, acl_name, NULL);
}
static inline void evm_inode_post_set_acl(struct dentry *dentry,
const char *acl_name,
struct posix_acl *kacl)
{
return evm_inode_post_setxattr(dentry, acl_name, NULL, 0);
}
int evm_inode_init_security(struct inode *inode, struct inode *dir,
const struct qstr *qstr, struct xattr *xattrs,
int *xattr_count);
extern bool evm_revalidate_status(const char *xattr_name);
extern int evm_protected_xattr_if_enabled(const char *req_xattr_name);
extern int evm_read_protected_xattrs(struct dentry *dentry, u8 *buffer,
int buffer_size, char type,
bool canonical_fmt);
#ifdef CONFIG_FS_POSIX_ACL
extern int posix_xattr_acl(const char *xattrname);
#else
static inline int posix_xattr_acl(const char *xattrname)
{
return 0;
}
#endif
#else
static inline int evm_set_key(void *key, size_t keylen)
{
return -EOPNOTSUPP;
}
#ifdef CONFIG_INTEGRITY
static inline enum integrity_status evm_verifyxattr(struct dentry *dentry,
const char *xattr_name,
void *xattr_value,
size_t xattr_value_len,
struct integrity_iint_cache *iint)
{
return INTEGRITY_UNKNOWN;
}
#endif
static inline int evm_inode_setattr(struct mnt_idmap *idmap,
struct dentry *dentry, struct iattr *attr)
{
return 0;
}
static inline void evm_inode_post_setattr(struct dentry *dentry, int ia_valid)
{
return;
}
static inline int evm_inode_setxattr(struct mnt_idmap *idmap,
struct dentry *dentry, const char *name,
const void *value, size_t size)
{
return 0;
}
static inline void evm_inode_post_setxattr(struct dentry *dentry,
const char *xattr_name,
const void *xattr_value,
size_t xattr_value_len)
{
return;
}
static inline int evm_inode_removexattr(struct mnt_idmap *idmap,
struct dentry *dentry,
const char *xattr_name)
{
return 0;
}
static inline void evm_inode_post_removexattr(struct dentry *dentry,
const char *xattr_name)
{
return;
}
static inline void evm_inode_post_remove_acl(struct mnt_idmap *idmap,
struct dentry *dentry,
const char *acl_name)
{
return;
}
static inline int evm_inode_set_acl(struct mnt_idmap *idmap,
struct dentry *dentry, const char *acl_name,
struct posix_acl *kacl)
{
return 0;
}
static inline int evm_inode_remove_acl(struct mnt_idmap *idmap,
struct dentry *dentry,
const char *acl_name)
{
return 0;
}
static inline void evm_inode_post_set_acl(struct dentry *dentry,
const char *acl_name,
struct posix_acl *kacl)
{
return;
}
static inline int evm_inode_init_security(struct inode *inode, struct inode *dir,
const struct qstr *qstr,
struct xattr *xattrs,
int *xattr_count)
{
return 0;
}
static inline bool evm_revalidate_status(const char *xattr_name)
{
return false;
}
static inline int evm_protected_xattr_if_enabled(const char *req_xattr_name)
{
return false;
}
static inline int evm_read_protected_xattrs(struct dentry *dentry, u8 *buffer,
int buffer_size, char type,
bool canonical_fmt)
{
return -EOPNOTSUPP;
}
#endif /* CONFIG_EVM */
#endif /* LINUX_EVM_H */
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