/*
* security/tomoyo/common.h
*
* Header file for TOMOYO.
*
* Copyright (C) 2005-2010 NTT DATA CORPORATION
*/
#ifndef _SECURITY_TOMOYO_COMMON_H
#define _SECURITY_TOMOYO_COMMON_H
#include <linux/ctype.h>
#include <linux/string.h>
#include <linux/mm.h>
#include <linux/file.h>
#include <linux/kmod.h>
#include <linux/fs.h>
#include <linux/sched.h>
#include <linux/namei.h>
#include <linux/mount.h>
#include <linux/list.h>
#include <linux/cred.h>
#include <linux/poll.h>
struct linux_binprm;
/********** Constants definitions. **********/
/*
* TOMOYO uses this hash only when appending a string into the string
* table. Frequency of appending strings is very low. So we don't need
* large (e.g. 64k) hash size. 256 will be sufficient.
*/
#define TOMOYO_HASH_BITS 8
#define TOMOYO_MAX_HASH (1u<<TOMOYO_HASH_BITS)
#define TOMOYO_EXEC_TMPSIZE 4096
/* Profile number is an integer between 0 and 255. */
#define TOMOYO_MAX_PROFILES 256
/* Index numbers for operation mode. */
enum tomoyo_mode_index {
TOMOYO_CONFIG_DISABLED,
TOMOYO_CONFIG_LEARNING,
TOMOYO_CONFIG_PERMISSIVE,
TOMOYO_CONFIG_ENFORCING,
TOMOYO_CONFIG_USE_DEFAULT = 255
};
/* Index numbers for entry type. */
enum tomoyo_policy_id {
TOMOYO_ID_GROUP,
TOMOYO_ID_PATH_GROUP,
TOMOYO_ID_NUMBER_GROUP,
TOMOYO_ID_TRANSITION_CONTROL,
TOMOYO_ID_AGGREGATOR,
TOMOYO_ID_MANAGER,
TOMOYO_ID_NAME,
TOMOYO_ID_ACL,
TOMOYO_ID_DOMAIN,
TOMOYO_MAX_POLICY
};
/* Index numbers for group entries. */
enum tomoyo_group_id {
TOMOYO_PATH_GROUP,
TOMOYO_NUMBER_GROUP,
TOMOYO_MAX_GROUP
};
/* A domain definition starts with <kernel>. */
#define TOMOYO_ROOT_NAME "<kernel>"
#define TOMOYO_ROOT_NAME_LEN (sizeof(TOMOYO_ROOT_NAME) - 1)
/* Index numbers for type of numeric values. */
enum tomoyo_value_type {
TOMOYO_VALUE_TYPE_INVALID,
TOMOYO_VALUE_TYPE_DECIMAL,
TOMOYO_VALUE_TYPE_OCTAL,
TOMOYO_VALUE_TYPE_HEXADECIMAL,
};
/* Index numbers for domain transition control keywords. */
enum tomoyo_transition_type {
/* Do not change this order, */
TOMOYO_TRANSITION_CONTROL_NO_INITIALIZE,
TOMOYO_TRANSITION_CONTROL_INITIALIZE,
TOMOYO_TRANSITION_CONTROL_NO_KEEP,
TOMOYO_TRANSITION_CONTROL_KEEP,
TOMOYO_MAX_TRANSITION_TYPE
};
/* Index numbers for Access Controls. */
enum tomoyo_acl_entry_type_index {
TOMOYO_TYPE_PATH_ACL,
TOMOYO_TYPE_PATH2_ACL,
TOMOYO_TYPE_PATH_NUMBER_ACL,
TOMOYO_TYPE_MKDEV_ACL,
TOMOYO_TYPE_MOUNT_ACL,
};
/* Index numbers for access controls with one pathname. */
enum tomoyo_path_acl_index {
TOMOYO_TYPE_EXECUTE,
TOMOYO_TYPE_READ,
TOMOYO_TYPE_WRITE,
TOMOYO_TYPE_APPEND,
TOMOYO_TYPE_UNLINK,
TOMOYO_TYPE_GETATTR,
TOMOYO_TYPE_RMDIR,
TOMOYO_TYPE_TRUNCATE,
TOMOYO_TYPE_SYMLINK,
TOMOYO_TYPE_CHROOT,
TOMOYO_TYPE_UMOUNT,
TOMOYO_MAX_PATH_OPERATION
};
enum tomoyo_mkdev_acl_index {
TOMOYO_TYPE_MKBLOCK,
TOMOYO_TYPE_MKCHAR,
TOMOYO_MAX_MKDEV_OPERATION
};
/* Index numbers for access controls with two pathnames. */
enum tomoyo_path2_acl_index {
TOMOYO_TYPE_LINK,
TOMOYO_TYPE_RENAME,
TOMOYO_TYPE_PIVOT_ROOT,
TOMOYO_MAX_PATH2_OPERATION
};
/* Index numbers for access controls with one pathname and one number. */
enum tomoyo_path_number_acl_index {
TOMOYO_TYPE_CREATE,
TOMOYO_TYPE_MKDIR,
TOMOYO_TYPE_MKFIFO,
TOMOYO_TYPE_MKSOCK,
TOMOYO_TYPE_IOCTL,
TOMOYO_TYPE_CHMOD,
TOMOYO_TYPE_CHOWN,
TOMOYO_TYPE_CHGRP,
TOMOYO_MAX_PATH_NUMBER_OPERATION
};
/* Index numbers for /sys/kernel/security/tomoyo/ interfaces. */
enum tomoyo_securityfs_interface_index {
TOMOYO_DOMAINPOLICY,
TOMOYO_EXCEPTIONPOLICY,
TOMOYO_DOMAIN_STATUS,
TOMOYO_PROCESS_STATUS,
TOMOYO_MEMINFO,
TOMOYO_SELFDOMAIN,
TOMOYO_VERSION,
TOMOYO_PROFILE,
TOMOYO_QUERY,
TOMOYO_MANAGER
};
/* Index numbers for special mount operations. */
enum tomoyo_special_mount {
TOMOYO_MOUNT_BIND, /* mount --bind /source /dest */
TOMOYO_MOUNT_MOVE, /* mount --move /old /new */
TOMOYO_MOUNT_REMOUNT, /* mount -o remount /dir */
TOMOYO_MOUNT_MAKE_UNBINDABLE, /* mount --make-unbindable /dir */
TOMOYO_MOUNT_MAKE_PRIVATE, /* mount --make-private /dir */
TOMOYO_MOUNT_MAKE_SLAVE, /* mount --make-slave /dir */
TOMOYO_MOUNT_MAKE_SHARED, /* mount --make-shared /dir */
TOMOYO_MAX_SPECIAL_MOUNT
};
/* Index numbers for functionality. */
enum tomoyo_mac_index {
TOMOYO_MAC_FILE_EXECUTE,
TOMOYO_MAC_FILE_OPEN,
TOMOYO_MAC_FILE_CREATE,
TOMOYO_MAC_FILE_UNLINK,
TOMOYO_MAC_FILE_GETATTR,
TOMOYO_MAC_FILE_MKDIR,
TOMOYO_MAC_FILE_RMDIR,
TOMOYO_MAC_FILE_MKFIFO,
TOMOYO_MAC_FILE_MKSOCK,
TOMOYO_MAC_FILE_TRUNCATE,
TOMOYO_MAC_FILE_SYMLINK,
TOMOYO_MAC_FILE_MKBLOCK,
TOMOYO_MAC_FILE_MKCHAR,
TOMOYO_MAC_FILE_LINK,
TOMOYO_MAC_FILE_RENAME,
TOMOYO_MAC_FILE_CHMOD,
TOMOYO_MAC_FILE_CHOWN,
TOMOYO_MAC_FILE_CHGRP,
TOMOYO_MAC_FILE_IOCTL,
TOMOYO_MAC_FILE_CHROOT,
TOMOYO_MAC_FILE_MOUNT,
TOMOYO_MAC_FILE_UMOUNT,
TOMOYO_MAC_FILE_PIVOT_ROOT,
TOMOYO_MAX_MAC_INDEX
};
/* Index numbers for category of functionality. */
enum tomoyo_mac_category_index {
TOMOYO_MAC_CATEGORY_FILE,
TOMOYO_MAX_MAC_CATEGORY_INDEX
};
/*
* Retry this request. Returned by tomoyo_supervisor() if policy violation has
* occurred in enforcing mode and the userspace daemon decided to retry.
*
* We must choose a positive value in order to distinguish "granted" (which is
* 0) and "rejected" (which is a negative value) and "retry".
*/
#define TOMOYO_RETRY_REQUEST 1
/********** Structure definitions. **********/
/* Common header for holding ACL entries. */
struct tomoyo_acl_head {
struct list_head list;
bool is_deleted;
} __packed;
/* Common header for shared entries. */
struct tomoyo_shared_acl_head {
struct list_head list;
atomic_t users;
} __packed;
/* Structure for request info. */
struct tomoyo_request_info {
struct tomoyo_domain_info *domain;
/* For holding parameters. */
union {
struct {
const struct tomoyo_path_info *filename;
/* For using wildcards at tomoyo_find_next_domain(). */
const struct tomoyo_path_info *matched_path;
/* One of values in "enum tomoyo_path_acl_index". */
u8 operation;
} path;
struct {
const struct tomoyo_path_info *filename1;
const struct tomoyo_path_info *filename2;
/* One of values in "enum tomoyo_path2_acl_index". */
u8 operation;
} path2;
struct {
const struct tomoyo_path_info *filename;
unsigned int mode;
unsigned int major;
unsigned int minor;
/* One of values in "enum tomoyo_mkdev_acl_index". */
u8 operation;
} mkdev;
struct {
const struct tomoyo_path_info *filename;
unsigned long number;
/*
* One of values in
* "enum tomoyo_path_number_acl_index".
*/
u8 operation;
} path_number;
struct {
const struct tomoyo_path_info *type;
const struct tomoyo_path_info *dir;
const struct tomoyo_path_info *dev;
unsigned long flags;
int need_dev;
} mount;
} param;
u8 param_type;
bool granted;
u8 retry;
u8 profile;
u8 mode; /* One of tomoyo_mode_index . */
u8 type;
};
/* Structure for holding a token. */
struct tomoyo_path_info {
const char *name;
u32 hash; /* = full_name_hash(name, strlen(name)) */
u16 const_len; /* = tomoyo_const_part_length(name) */
bool is_dir; /* = tomoyo_strendswith(name, "/") */
bool is_patterned; /* = tomoyo_path_contains_pattern(name) */
};
/* Structure for holding string data. */
struct tomoyo_name {
struct tomoyo_shared_acl_head head;
struct tomoyo_path_info entry;
};
/* Structure for holding a word. */
struct tomoyo_name_union {
/* Either @filename or @group is NULL. */
const struct tomoyo_path_info *filename;
struct tomoyo_group *group;
};
/* Structure for holding a number. */
struct tomoyo_number_union {
unsigned long values[2];
struct tomoyo_group *group; /* Maybe NULL. */
/* One of values in "enum tomoyo_value_type". */
u8 value_type[2];
};
/* Structure for "path_group"/"number_group" directive. */
struct tomoyo_group {
struct tomoyo_shared_acl_head head;
const struct tomoyo_path_info *group_name;
struct list_head member_list;
};
/* Structure for "path_group" directive. */
struct tomoyo_path_group {
struct tomoyo_acl_head head;
const struct tomoyo_path_info *member_name;
};
/* Structure for "number_group" directive. */
struct tomoyo_number_group {
struct tomoyo_acl_head head;
struct tomoyo_number_union number;
};
/* Common header for individual entries. */
struct tomoyo_acl_info {
struct list_head list;
bool is_deleted;
u8 type; /* One of values in "enum tomoyo_acl_entry_type_index". */
} __packed;
/* Structure for domain information. */
struct tomoyo_domain_info {
struct list_head list;
struct list_head acl_info_list;
/* Name of this domain. Never NULL. */
const struct tomoyo_path_info *domainname;
u8 profile; /* Profile number to use. */
bool is_deleted; /* Delete flag. */
bool quota_warned; /* Quota warnning flag. */
bool transition_failed; /* Domain transition failed flag. */
atomic_t users; /* Number of referring credentials. */
};
/*
* Structure for "file execute", "file read", "file write", "file append",
* "file unlink", "file getattr", "file rmdir", "file truncate",
* "file symlink", "file chroot" and "file unmount" directive.
*/
struct tomoyo_path_acl {
struct tomoyo_acl_info head; /* type = TOMOYO_TYPE_PATH_ACL */
u16 perm; /* Bitmask of values in "enum tomoyo_path_acl_index". */
struct tomoyo_name_union name;
};
/*
* Structure for "file create", "file mkdir", "file mkfifo", "file mksock",
* "file ioctl", "file chmod", "file chown" and "file chgrp" directive.
*/
struct tomoyo_path_number_acl {
struct tomoyo_acl_info head; /* type = TOMOYO_TYPE_PATH_NUMBER_ACL */
/* Bitmask of values in "enum tomoyo_path_number_acl_index". */
u8 perm;
struct tomoyo_name_union name;
struct tomoyo_number_union number;
};
/* Structure for "file mkblock" and "file mkchar" directive. */
struct tomoyo_mkdev_acl {
struct tomoyo_acl_info head; /* type = TOMOYO_TYPE_MKDEV_ACL */
u8 perm; /* Bitmask of values in "enum tomoyo_mkdev_acl_index". */
struct tomoyo_name_union name;
struct tomoyo_number_union mode;
struct tomoyo_number_union major;
struct tomoyo_number_union minor;
};
/*
* Structure for "file rename", "file link" and "file pivot_root" directive.
*/
struct tomoyo_path2_acl {
struct tomoyo_acl_info head; /* type = TOMOYO_TYPE_PATH2_ACL */
u8 perm; /* Bitmask of values in "enum tomoyo_path2_acl_index". */
struct tomoyo_name_union name1;
struct tomoyo_name_union name2;
};
/* Structure for "file mount" directive. */
struct tomoyo_mount_acl {
struct tomoyo_acl_info head; /* type = TOMOYO_TYPE_MOUNT_ACL */
struct tomoyo_name_union dev_name;
struct tomoyo_name_union dir_name;
struct tomoyo_name_union fs_type;
struct tomoyo_number_union flags;
};
/* Structure for holding a line from /sys/kernel/security/tomoyo/ interface. */
struct tomoyo_acl_param {
char *data;
struct list_head *list;
bool is_delete;
};
#define TOMOYO_MAX_IO_READ_QUEUE 64
/*
* Structure for reading/writing policy via /sys/kernel/security/tomoyo
* interfaces.
*/
struct tomoyo_io_buffer {
void (*read) (struct tomoyo_io_buffer *);
int (*write) (struct tomoyo_io_buffer *);
int (*poll) (struct file *file, poll_table *wait);
/* Exclusive lock for this structure. */
struct mutex io_sem;
/* Index returned by tomoyo_read_lock(). */
int reader_idx;
char __user *read_user_buf;
int read_user_buf_avail;
struct {
struct list_head *domain;
struct list_head *group;
struct list_head *acl;
int avail;
int step;
int query_index;
u16 index;
u8 bit;
u8 w_pos;
bool eof;
bool print_this_domain_only;
bool print_execute_only;
const char *w[TOMOYO_MAX_IO_READ_QUEUE];
} r;
struct {
/* The position currently writing to. */
struct tomoyo_domain_info *domain;
/* Bytes available for writing. */
int avail;
} w;
/* Buffer for reading. */
char *read_buf;
/* Size of read buffer. */
int readbuf_size;
/* Buffer for writing. */
char *write_buf;
/* Size of write buffer. */
int writebuf_size;
/* Type of this interface. */
u8 type;
};
/*
* Structure for "initialize_domain"/"no_initialize_domain"/"keep_domain"/
* "no_keep_domain" keyword.
*/
struct tomoyo_transition_control {
struct tomoyo_acl_head head;
u8 type; /* One of values in "enum tomoyo_transition_type". */
/* True if the domainname is tomoyo_get_last_name(). */
bool is_last_name;
const struct tomoyo_path_info *domainname; /* Maybe NULL */
const struct tomoyo_path_info *program; /* Maybe NULL */
};
/* Structure for "aggregator" keyword. */
struct tomoyo_aggregator {
struct tomoyo_acl_head head;
const struct tomoyo_path_info *original_name;
const struct tomoyo_path_info *aggregated_name;
};
/* Structure for policy manager. */
struct tomoyo_manager {
struct tomoyo_acl_head head;
bool is_domain; /* True if manager is a domainname. */
/* A path to program or a domainname. */
const struct tomoyo_path_info *manager;
};
struct tomoyo_preference {
unsigned int learning_max_entry;
bool enforcing_verbose;
bool learning_verbose;
bool permissive_verbose;
};
/* Structure for /sys/kernel/security/tomnoyo/profile interface. */
struct tomoyo_profile {
const struct tomoyo_path_info *comment;
struct tomoyo_preference *learning;
struct tomoyo_preference *permissive;
struct tomoyo_preference *enforcing;
struct tomoyo_preference preference;
u8 default_config;
u8 config[TOMOYO_MAX_MAC_INDEX + TOMOYO_MAX_MAC_CATEGORY_INDEX];
};
/********** Function prototypes. **********/
bool tomoyo_str_starts(char **src, const char *find);
const char *tomoyo_get_exe(void);
void tomoyo_normalize_line(unsigned char *buffer);
void tomoyo_warn_log(struct tomoyo_request_info *r, const char *fmt, ...)
__attribute__ ((format(printf, 2, 3)));
void tomoyo_check_profile(void);
int tomoyo_open_control(const u8 type, struct file *file);
int tomoyo_close_control(struct tomoyo_io_buffer *head);
int tomoyo_poll_control(struct file *file, poll_table *wait);
int tomoyo_read_control(struct tomoyo_io_buffer *head, char __user *buffer,
const int buffer_len);
int tomoyo_write_control(struct tomoyo_io_buffer *head,
const char __user *buffer, const int buffer_len);
bool tomoyo_domain_quota_is_ok(struct tomoyo_request_info *r);
void tomoyo_warn_oom(const char *function);
const struct tomoyo_path_info *
tomoyo_compare_name_union(const struct tomoyo_path_info *name,
const struct tomoyo_name_union *ptr);
bool tomoyo_compare_number_union(const unsigned long value,
const struct tomoyo_number_union *ptr);
int tomoyo_get_mode(const u8 profile, const u8 index);
void tomoyo_io_printf(struct tomoyo_io_buffer *head, const char *fmt, ...)
__attribute__ ((format(printf, 2, 3)));
bool tomoyo_correct_domain(const unsigned char *domainname);
bool tomoyo_correct_path(const char *filename);
bool tomoyo_correct_word(const char *string);
bool tomoyo_domain_def(const unsigned char *buffer);
bool tomoyo_parse_name_union(struct tomoyo_acl_param *param,
struct tomoyo_name_union *ptr);
const struct tomoyo_path_info *
tomoyo_path_matches_group(const struct tomoyo_path_info *pathname,
const struct tomoyo_group *group);
bool tomoyo_number_matches_group(const unsigned long min,
const unsigned long max,
const struct tomoyo_group *group);
bool tomoyo_path_matches_pattern(const struct tomoyo_path_info *filename,
const struct tomoyo_path_info *pattern);
bool tomoyo_parse_number_union(struct tomoyo_acl_param *param,
struct tomoyo_number_union *ptr);
bool tomoyo_tokenize(char *buffer, char *w[], size_t size);
bool tomoyo_verbose_mode(const struct tomoyo_domain_info *domain);
int tomoyo_init_request_info(struct tomoyo_request_info *r,
struct tomoyo_domain_info *domain,
const u8 index);
int tomoyo_mount_permission(char *dev_name, struct path *path,
const char *type, unsigned long flags,
void *data_page);
int tomoyo_write_aggregator(struct tomoyo_acl_param *param);
int tomoyo_write_transition_control(struct tomoyo_acl_param *param,
const u8 type);
int tomoyo_write_file(struct tomoyo_acl_param *param);
int tomoyo_write_group(struct tomoyo_acl_param *param, const u8 type);
int tomoyo_supervisor(struct tomoyo_request_info *r, const char *fmt, ...)
__attribute__ ((format(printf, 2, 3)));
struct tomoyo_domain_info *tomoyo_find_domain(const char *domainname);
struct tomoyo_domain_info *tomoyo_assign_domain(const char *domainname,
const u8 profile);
struct tomoyo_profile *tomoyo_profile(const u8 profile);
struct tomoyo_group *tomoyo_get_group(struct tomoyo_acl_param *param,
const u8 idx);
unsigned int tomoyo_check_flags(const struct tomoyo_domain_info *domain,
const u8 index);
void tomoyo_fill_path_info(struct tomoyo_path_info *ptr);
void tomoyo_load_policy(const char *filename);
void tomoyo_put_number_union(struct tomoyo_number_union *ptr);
char *tomoyo_encode(const char *str);
char *tomoyo_realpath_nofollow(const char *pathname);
char *tomoyo_realpath_from_path(struct path *path);
bool tomoyo_memory_ok(void *ptr);
void *tomoyo_commit_ok(void *data, const unsigned int size);
const struct tomoyo_path_info *tomoyo_get_name(const char *name);
void tomoyo_read_memory_counter(struct tomoyo_io_buffer *head);
int tomoyo_write_memory_quota(struct tomoyo_io_buffer *head);
void __init tomoyo_mm_init(void);
int tomoyo_path_permission(struct tomoyo_request_info *r, u8 operation,
const struct tomoyo_path_info *filename);
int tomoyo_check_open_permission(struct tomoyo_domain_info *domain,
struct path *path, const int flag);
int tomoyo_path_number_perm(const u8 operation, struct path *path,
unsigned long number);
int tomoyo_mkdev_perm(const u8 operation, struct path *path,
const unsigned int mode, unsigned int dev);
int tomoyo_path_perm(const u8 operation, struct path *path);
int tomoyo_path2_perm(const u8 operation, struct path *path1,
struct path *path2);
int tomoyo_find_next_domain(struct linux_binprm *bprm);
void tomoyo_print_ulong(char *buffer, const int buffer_len,
const unsigned long value, const u8 type);
void tomoyo_put_name_union(struct tomoyo_name_union *ptr);
void tomoyo_run_gc(void);
void tomoyo_memory_free(void *ptr);
int tomoyo_update_domain(struct tomoyo_acl_info *new_entry, const int size,
struct tomoyo_acl_param *param,
bool (*check_duplicate) (const struct tomoyo_acl_info
*,
const struct tomoyo_acl_info
*),
bool (*merge_duplicate) (struct tomoyo_acl_info *,
struct tomoyo_acl_info *,
const bool));
int tomoyo_update_policy(struct tomoyo_acl_head *new_entry, const int size,
struct tomoyo_acl_param *param,
bool (*check_duplicate) (const struct tomoyo_acl_head
*,
const struct tomoyo_acl_head
*));
void tomoyo_check_acl(struct tomoyo_request_info *r,
bool (*check_entry) (struct tomoyo_request_info *,
const struct tomoyo_acl_info *));
char *tomoyo_read_token(struct tomoyo_acl_param *param);
bool tomoyo_permstr(const char *string, const char *keyword);
/********** External variable definitions. **********/
/* Lock for GC. */
extern struct srcu_struct tomoyo_ss;
/* The list for "struct tomoyo_domain_info". */
extern struct list_head tomoyo_domain_list;
extern struct list_head tomoyo_policy_list[TOMOYO_MAX_POLICY];
extern struct list_head tomoyo_group_list[TOMOYO_MAX_GROUP];
extern struct list_head tomoyo_name_list[TOMOYO_MAX_HASH];
/* Lock for protecting policy. */
extern struct mutex tomoyo_policy_lock;
/* Has /sbin/init started? */
extern bool tomoyo_policy_loaded;
/* The kernel's domain. */
extern struct tomoyo_domain_info tomoyo_kernel_domain;
extern const char *tomoyo_path_keyword[TOMOYO_MAX_PATH_OPERATION];
extern const char *tomoyo_mkdev_keyword[TOMOYO_MAX_MKDEV_OPERATION];
extern const char *tomoyo_path2_keyword[TOMOYO_MAX_PATH2_OPERATION];
extern const char *tomoyo_path_number_keyword[TOMOYO_MAX_PATH_NUMBER_OPERATION];
extern const u8 tomoyo_pnnn2mac[TOMOYO_MAX_MKDEV_OPERATION];
extern const u8 tomoyo_pp2mac[TOMOYO_MAX_PATH2_OPERATION];
extern const u8 tomoyo_pn2mac[TOMOYO_MAX_PATH_NUMBER_OPERATION];
extern unsigned int tomoyo_quota_for_query;
extern unsigned int tomoyo_query_memory_size;
/********** Inlined functions. **********/
/**
* tomoyo_read_lock - Take lock for protecting policy.
*
* Returns index number for tomoyo_read_unlock().
*/
static inline int tomoyo_read_lock(void)
{
return srcu_read_lock(&tomoyo_ss);
}
/**
* tomoyo_read_unlock - Release lock for protecting policy.
*
* @idx: Index number returned by tomoyo_read_lock().
*
* Returns nothing.
*/
static inline void tomoyo_read_unlock(int idx)
{
srcu_read_unlock(&tomoyo_ss, idx);
}
/**
* tomoyo_pathcmp - strcmp() for "struct tomoyo_path_info" structure.
*
* @a: Pointer to "struct tomoyo_path_info".
* @b: Pointer to "struct tomoyo_path_info".
*
* Returns true if @a == @b, false otherwise.
*/
static inline bool tomoyo_pathcmp(const struct tomoyo_path_info *a,
const struct tomoyo_path_info *b)
{
return a->hash != b->hash || strcmp(a->name, b->name);
}
/**
* tomoyo_put_name - Drop reference on "struct tomoyo_name".
*
* @name: Pointer to "struct tomoyo_path_info". Maybe NULL.
*
* Returns nothing.
*/
static inline void tomoyo_put_name(const struct tomoyo_path_info *name)
{
if (name) {
struct tomoyo_name *ptr =
container_of(name, typeof(*ptr), entry);
atomic_dec(&ptr->head.users);
}
}
/**
* tomoyo_put_group - Drop reference on "struct tomoyo_group".
*
* @group: Pointer to "struct tomoyo_group". Maybe NULL.
*
* Returns nothing.
*/
static inline void tomoyo_put_group(struct tomoyo_group *group)
{
if (group)
atomic_dec(&group->head.users);
}
/**
* tomoyo_domain - Get "struct tomoyo_domain_info" for current thread.
*
* Returns pointer to "struct tomoyo_domain_info" for current thread.
*/
static inline struct tomoyo_domain_info *tomoyo_domain(void)
{
return current_cred()->security;
}
/**
* tomoyo_real_domain - Get "struct tomoyo_domain_info" for specified thread.
*
* @task: Pointer to "struct task_struct".
*
* Returns pointer to "struct tomoyo_security" for specified thread.
*/
static inline struct tomoyo_domain_info *tomoyo_real_domain(struct task_struct
*task)
{
return task_cred_xxx(task, security);
}
/**
* tomoyo_same_name_union - Check for duplicated "struct tomoyo_name_union" entry.
*
* @a: Pointer to "struct tomoyo_name_union".
* @b: Pointer to "struct tomoyo_name_union".
*
* Returns true if @a == @b, false otherwise.
*/
static inline bool tomoyo_same_name_union
(const struct tomoyo_name_union *a, const struct tomoyo_name_union *b)
{
return a->filename == b->filename && a->group == b->group;
}
/**
* tomoyo_same_number_union - Check for duplicated "struct tomoyo_number_union" entry.
*
* @a: Pointer to "struct tomoyo_number_union".
* @b: Pointer to "struct tomoyo_number_union".
*
* Returns true if @a == @b, false otherwise.
*/
static inline bool tomoyo_same_number_union
(const struct tomoyo_number_union *a, const struct tomoyo_number_union *b)
{
return a->values[0] == b->values[0] && a->values[1] == b->values[1] &&
a->group == b->group && a->value_type[0] == b->value_type[0] &&
a->value_type[1] == b->value_type[1];
}
/**
* list_for_each_cookie - iterate over a list with cookie.
* @pos: the &struct list_head to use as a loop cursor.
* @head: the head for your list.
*/
#define list_for_each_cookie(pos, head) \
if (!pos) \
pos = srcu_dereference((head)->next, &tomoyo_ss); \
for ( ; pos != (head); pos = srcu_dereference(pos->next, &tomoyo_ss))
#endif /* !defined(_SECURITY_TOMOYO_COMMON_H) */
