mirror of
https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git
synced 2024-09-26 12:26:11 +00:00
700b794052
Convert to struct mnt_idmap.
Last cycle we merged the necessary infrastructure in
256c8aed2b ("fs: introduce dedicated idmap type for mounts").
This is just the conversion to struct mnt_idmap.
Currently we still pass around the plain namespace that was attached to a
mount. This is in general pretty convenient but it makes it easy to
conflate namespaces that are relevant on the filesystem with namespaces
that are relevent on the mount level. Especially for non-vfs developers
without detailed knowledge in this area this can be a potential source for
bugs.
Once the conversion to struct mnt_idmap is done all helpers down to the
really low-level helpers will take a struct mnt_idmap argument instead of
two namespace arguments. This way it becomes impossible to conflate the two
eliminating the possibility of any bugs. All of the vfs and all filesystems
only operate on struct mnt_idmap.
Acked-by: Dave Chinner <dchinner@redhat.com>
Reviewed-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: Christian Brauner (Microsoft) <brauner@kernel.org>
250 lines
6.4 KiB
C
250 lines
6.4 KiB
C
/* SPDX-License-Identifier: GPL-2.0-only */
|
|
/*
|
|
* Copyright (C) 2008 IBM Corporation
|
|
* Author: Mimi Zohar <zohar@us.ibm.com>
|
|
*/
|
|
|
|
#ifndef _LINUX_IMA_H
|
|
#define _LINUX_IMA_H
|
|
|
|
#include <linux/kernel_read_file.h>
|
|
#include <linux/fs.h>
|
|
#include <linux/security.h>
|
|
#include <linux/kexec.h>
|
|
#include <crypto/hash_info.h>
|
|
struct linux_binprm;
|
|
|
|
#ifdef CONFIG_IMA
|
|
extern enum hash_algo ima_get_current_hash_algo(void);
|
|
extern int ima_bprm_check(struct linux_binprm *bprm);
|
|
extern int ima_file_check(struct file *file, int mask);
|
|
extern void ima_post_create_tmpfile(struct mnt_idmap *idmap,
|
|
struct inode *inode);
|
|
extern void ima_file_free(struct file *file);
|
|
extern int ima_file_mmap(struct file *file, unsigned long prot);
|
|
extern int ima_file_mprotect(struct vm_area_struct *vma, unsigned long prot);
|
|
extern int ima_load_data(enum kernel_load_data_id id, bool contents);
|
|
extern int ima_post_load_data(char *buf, loff_t size,
|
|
enum kernel_load_data_id id, char *description);
|
|
extern int ima_read_file(struct file *file, enum kernel_read_file_id id,
|
|
bool contents);
|
|
extern int ima_post_read_file(struct file *file, void *buf, loff_t size,
|
|
enum kernel_read_file_id id);
|
|
extern void ima_post_path_mknod(struct mnt_idmap *idmap,
|
|
struct dentry *dentry);
|
|
extern int ima_file_hash(struct file *file, char *buf, size_t buf_size);
|
|
extern int ima_inode_hash(struct inode *inode, char *buf, size_t buf_size);
|
|
extern void ima_kexec_cmdline(int kernel_fd, const void *buf, int size);
|
|
extern int ima_measure_critical_data(const char *event_label,
|
|
const char *event_name,
|
|
const void *buf, size_t buf_len,
|
|
bool hash, u8 *digest, size_t digest_len);
|
|
|
|
#ifdef CONFIG_IMA_APPRAISE_BOOTPARAM
|
|
extern void ima_appraise_parse_cmdline(void);
|
|
#else
|
|
static inline void ima_appraise_parse_cmdline(void) {}
|
|
#endif
|
|
|
|
#ifdef CONFIG_IMA_KEXEC
|
|
extern void ima_add_kexec_buffer(struct kimage *image);
|
|
#endif
|
|
|
|
#else
|
|
static inline enum hash_algo ima_get_current_hash_algo(void)
|
|
{
|
|
return HASH_ALGO__LAST;
|
|
}
|
|
|
|
static inline int ima_bprm_check(struct linux_binprm *bprm)
|
|
{
|
|
return 0;
|
|
}
|
|
|
|
static inline int ima_file_check(struct file *file, int mask)
|
|
{
|
|
return 0;
|
|
}
|
|
|
|
static inline void ima_post_create_tmpfile(struct mnt_idmap *idmap,
|
|
struct inode *inode)
|
|
{
|
|
}
|
|
|
|
static inline void ima_file_free(struct file *file)
|
|
{
|
|
return;
|
|
}
|
|
|
|
static inline int ima_file_mmap(struct file *file, unsigned long prot)
|
|
{
|
|
return 0;
|
|
}
|
|
|
|
static inline int ima_file_mprotect(struct vm_area_struct *vma,
|
|
unsigned long prot)
|
|
{
|
|
return 0;
|
|
}
|
|
|
|
static inline int ima_load_data(enum kernel_load_data_id id, bool contents)
|
|
{
|
|
return 0;
|
|
}
|
|
|
|
static inline int ima_post_load_data(char *buf, loff_t size,
|
|
enum kernel_load_data_id id,
|
|
char *description)
|
|
{
|
|
return 0;
|
|
}
|
|
|
|
static inline int ima_read_file(struct file *file, enum kernel_read_file_id id,
|
|
bool contents)
|
|
{
|
|
return 0;
|
|
}
|
|
|
|
static inline int ima_post_read_file(struct file *file, void *buf, loff_t size,
|
|
enum kernel_read_file_id id)
|
|
{
|
|
return 0;
|
|
}
|
|
|
|
static inline void ima_post_path_mknod(struct mnt_idmap *idmap,
|
|
struct dentry *dentry)
|
|
{
|
|
return;
|
|
}
|
|
|
|
static inline int ima_file_hash(struct file *file, char *buf, size_t buf_size)
|
|
{
|
|
return -EOPNOTSUPP;
|
|
}
|
|
|
|
static inline int ima_inode_hash(struct inode *inode, char *buf, size_t buf_size)
|
|
{
|
|
return -EOPNOTSUPP;
|
|
}
|
|
|
|
static inline void ima_kexec_cmdline(int kernel_fd, const void *buf, int size) {}
|
|
|
|
static inline int ima_measure_critical_data(const char *event_label,
|
|
const char *event_name,
|
|
const void *buf, size_t buf_len,
|
|
bool hash, u8 *digest,
|
|
size_t digest_len)
|
|
{
|
|
return -ENOENT;
|
|
}
|
|
|
|
#endif /* CONFIG_IMA */
|
|
|
|
#ifdef CONFIG_HAVE_IMA_KEXEC
|
|
int __init ima_free_kexec_buffer(void);
|
|
int __init ima_get_kexec_buffer(void **addr, size_t *size);
|
|
#endif
|
|
|
|
#ifdef CONFIG_IMA_SECURE_AND_OR_TRUSTED_BOOT
|
|
extern bool arch_ima_get_secureboot(void);
|
|
extern const char * const *arch_get_ima_policy(void);
|
|
#else
|
|
static inline bool arch_ima_get_secureboot(void)
|
|
{
|
|
return false;
|
|
}
|
|
|
|
static inline const char * const *arch_get_ima_policy(void)
|
|
{
|
|
return NULL;
|
|
}
|
|
#endif
|
|
|
|
#ifndef CONFIG_IMA_KEXEC
|
|
struct kimage;
|
|
|
|
static inline void ima_add_kexec_buffer(struct kimage *image)
|
|
{}
|
|
#endif
|
|
|
|
#ifdef CONFIG_IMA_MEASURE_ASYMMETRIC_KEYS
|
|
extern void ima_post_key_create_or_update(struct key *keyring,
|
|
struct key *key,
|
|
const void *payload, size_t plen,
|
|
unsigned long flags, bool create);
|
|
#else
|
|
static inline void ima_post_key_create_or_update(struct key *keyring,
|
|
struct key *key,
|
|
const void *payload,
|
|
size_t plen,
|
|
unsigned long flags,
|
|
bool create) {}
|
|
#endif /* CONFIG_IMA_MEASURE_ASYMMETRIC_KEYS */
|
|
|
|
#ifdef CONFIG_IMA_APPRAISE
|
|
extern bool is_ima_appraise_enabled(void);
|
|
extern void ima_inode_post_setattr(struct mnt_idmap *idmap,
|
|
struct dentry *dentry);
|
|
extern int ima_inode_setxattr(struct dentry *dentry, const char *xattr_name,
|
|
const void *xattr_value, size_t xattr_value_len);
|
|
extern int ima_inode_set_acl(struct mnt_idmap *idmap,
|
|
struct dentry *dentry, const char *acl_name,
|
|
struct posix_acl *kacl);
|
|
static inline int ima_inode_remove_acl(struct mnt_idmap *idmap,
|
|
struct dentry *dentry,
|
|
const char *acl_name)
|
|
{
|
|
return ima_inode_set_acl(idmap, dentry, acl_name, NULL);
|
|
}
|
|
extern int ima_inode_removexattr(struct dentry *dentry, const char *xattr_name);
|
|
#else
|
|
static inline bool is_ima_appraise_enabled(void)
|
|
{
|
|
return 0;
|
|
}
|
|
|
|
static inline void ima_inode_post_setattr(struct mnt_idmap *idmap,
|
|
struct dentry *dentry)
|
|
{
|
|
return;
|
|
}
|
|
|
|
static inline int ima_inode_setxattr(struct dentry *dentry,
|
|
const char *xattr_name,
|
|
const void *xattr_value,
|
|
size_t xattr_value_len)
|
|
{
|
|
return 0;
|
|
}
|
|
|
|
static inline int ima_inode_set_acl(struct mnt_idmap *idmap,
|
|
struct dentry *dentry, const char *acl_name,
|
|
struct posix_acl *kacl)
|
|
{
|
|
|
|
return 0;
|
|
}
|
|
|
|
static inline int ima_inode_removexattr(struct dentry *dentry,
|
|
const char *xattr_name)
|
|
{
|
|
return 0;
|
|
}
|
|
|
|
static inline int ima_inode_remove_acl(struct mnt_idmap *idmap,
|
|
struct dentry *dentry,
|
|
const char *acl_name)
|
|
{
|
|
return 0;
|
|
}
|
|
#endif /* CONFIG_IMA_APPRAISE */
|
|
|
|
#if defined(CONFIG_IMA_APPRAISE) && defined(CONFIG_INTEGRITY_TRUSTED_KEYRING)
|
|
extern bool ima_appraise_signature(enum kernel_read_file_id func);
|
|
#else
|
|
static inline bool ima_appraise_signature(enum kernel_read_file_id func)
|
|
{
|
|
return false;
|
|
}
|
|
#endif /* CONFIG_IMA_APPRAISE && CONFIG_INTEGRITY_TRUSTED_KEYRING */
|
|
#endif /* _LINUX_IMA_H */
|