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-rw-r--r--security/tomoyo/common.h1333
1 files changed, 1333 insertions, 0 deletions
diff --git a/security/tomoyo/common.h b/security/tomoyo/common.h
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+++ b/security/tomoyo/common.h
@@ -0,0 +1,1333 @@
+/* SPDX-License-Identifier: GPL-2.0 */
+/*
+ * security/tomoyo/common.h
+ *
+ * Header file for TOMOYO.
+ *
+ * Copyright (C) 2005-2011 NTT DATA CORPORATION
+ */
+
+#ifndef _SECURITY_TOMOYO_COMMON_H
+#define _SECURITY_TOMOYO_COMMON_H
+
+#define pr_fmt(fmt) fmt
+
+#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>
+#include <linux/binfmts.h>
+#include <linux/highmem.h>
+#include <linux/net.h>
+#include <linux/inet.h>
+#include <linux/in.h>
+#include <linux/in6.h>
+#include <linux/un.h>
+#include <linux/lsm_hooks.h>
+#include <net/sock.h>
+#include <net/af_unix.h>
+#include <net/ip.h>
+#include <net/ipv6.h>
+#include <net/udp.h>
+
+/********** 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)
+
+/*
+ * TOMOYO checks only SOCK_STREAM, SOCK_DGRAM, SOCK_RAW, SOCK_SEQPACKET.
+ * Therefore, we don't need SOCK_MAX.
+ */
+#define TOMOYO_SOCK_MAX 6
+
+#define TOMOYO_EXEC_TMPSIZE 4096
+
+/* Garbage collector is trying to kfree() this element. */
+#define TOMOYO_GC_IN_PROGRESS -1
+
+/* Profile number is an integer between 0 and 255. */
+#define TOMOYO_MAX_PROFILES 256
+
+/* Group number is an integer between 0 and 255. */
+#define TOMOYO_MAX_ACL_GROUPS 256
+
+/* Index numbers for "struct tomoyo_condition". */
+enum tomoyo_conditions_index {
+ TOMOYO_TASK_UID, /* current_uid() */
+ TOMOYO_TASK_EUID, /* current_euid() */
+ TOMOYO_TASK_SUID, /* current_suid() */
+ TOMOYO_TASK_FSUID, /* current_fsuid() */
+ TOMOYO_TASK_GID, /* current_gid() */
+ TOMOYO_TASK_EGID, /* current_egid() */
+ TOMOYO_TASK_SGID, /* current_sgid() */
+ TOMOYO_TASK_FSGID, /* current_fsgid() */
+ TOMOYO_TASK_PID, /* sys_getpid() */
+ TOMOYO_TASK_PPID, /* sys_getppid() */
+ TOMOYO_EXEC_ARGC, /* "struct linux_binprm *"->argc */
+ TOMOYO_EXEC_ENVC, /* "struct linux_binprm *"->envc */
+ TOMOYO_TYPE_IS_SOCKET, /* S_IFSOCK */
+ TOMOYO_TYPE_IS_SYMLINK, /* S_IFLNK */
+ TOMOYO_TYPE_IS_FILE, /* S_IFREG */
+ TOMOYO_TYPE_IS_BLOCK_DEV, /* S_IFBLK */
+ TOMOYO_TYPE_IS_DIRECTORY, /* S_IFDIR */
+ TOMOYO_TYPE_IS_CHAR_DEV, /* S_IFCHR */
+ TOMOYO_TYPE_IS_FIFO, /* S_IFIFO */
+ TOMOYO_MODE_SETUID, /* S_ISUID */
+ TOMOYO_MODE_SETGID, /* S_ISGID */
+ TOMOYO_MODE_STICKY, /* S_ISVTX */
+ TOMOYO_MODE_OWNER_READ, /* S_IRUSR */
+ TOMOYO_MODE_OWNER_WRITE, /* S_IWUSR */
+ TOMOYO_MODE_OWNER_EXECUTE, /* S_IXUSR */
+ TOMOYO_MODE_GROUP_READ, /* S_IRGRP */
+ TOMOYO_MODE_GROUP_WRITE, /* S_IWGRP */
+ TOMOYO_MODE_GROUP_EXECUTE, /* S_IXGRP */
+ TOMOYO_MODE_OTHERS_READ, /* S_IROTH */
+ TOMOYO_MODE_OTHERS_WRITE, /* S_IWOTH */
+ TOMOYO_MODE_OTHERS_EXECUTE, /* S_IXOTH */
+ TOMOYO_EXEC_REALPATH,
+ TOMOYO_SYMLINK_TARGET,
+ TOMOYO_PATH1_UID,
+ TOMOYO_PATH1_GID,
+ TOMOYO_PATH1_INO,
+ TOMOYO_PATH1_MAJOR,
+ TOMOYO_PATH1_MINOR,
+ TOMOYO_PATH1_PERM,
+ TOMOYO_PATH1_TYPE,
+ TOMOYO_PATH1_DEV_MAJOR,
+ TOMOYO_PATH1_DEV_MINOR,
+ TOMOYO_PATH2_UID,
+ TOMOYO_PATH2_GID,
+ TOMOYO_PATH2_INO,
+ TOMOYO_PATH2_MAJOR,
+ TOMOYO_PATH2_MINOR,
+ TOMOYO_PATH2_PERM,
+ TOMOYO_PATH2_TYPE,
+ TOMOYO_PATH2_DEV_MAJOR,
+ TOMOYO_PATH2_DEV_MINOR,
+ TOMOYO_PATH1_PARENT_UID,
+ TOMOYO_PATH1_PARENT_GID,
+ TOMOYO_PATH1_PARENT_INO,
+ TOMOYO_PATH1_PARENT_PERM,
+ TOMOYO_PATH2_PARENT_UID,
+ TOMOYO_PATH2_PARENT_GID,
+ TOMOYO_PATH2_PARENT_INO,
+ TOMOYO_PATH2_PARENT_PERM,
+ TOMOYO_MAX_CONDITION_KEYWORD,
+ TOMOYO_NUMBER_UNION,
+ TOMOYO_NAME_UNION,
+ TOMOYO_ARGV_ENTRY,
+ TOMOYO_ENVP_ENTRY,
+};
+
+
+/* Index numbers for stat(). */
+enum tomoyo_path_stat_index {
+ /* Do not change this order. */
+ TOMOYO_PATH1,
+ TOMOYO_PATH1_PARENT,
+ TOMOYO_PATH2,
+ TOMOYO_PATH2_PARENT,
+ TOMOYO_MAX_PATH_STAT
+};
+
+/* Index numbers for operation mode. */
+enum tomoyo_mode_index {
+ TOMOYO_CONFIG_DISABLED,
+ TOMOYO_CONFIG_LEARNING,
+ TOMOYO_CONFIG_PERMISSIVE,
+ TOMOYO_CONFIG_ENFORCING,
+ TOMOYO_CONFIG_MAX_MODE,
+ TOMOYO_CONFIG_WANT_REJECT_LOG = 64,
+ TOMOYO_CONFIG_WANT_GRANT_LOG = 128,
+ TOMOYO_CONFIG_USE_DEFAULT = 255,
+};
+
+/* Index numbers for entry type. */
+enum tomoyo_policy_id {
+ TOMOYO_ID_GROUP,
+ TOMOYO_ID_ADDRESS_GROUP,
+ TOMOYO_ID_PATH_GROUP,
+ TOMOYO_ID_NUMBER_GROUP,
+ TOMOYO_ID_TRANSITION_CONTROL,
+ TOMOYO_ID_AGGREGATOR,
+ TOMOYO_ID_MANAGER,
+ TOMOYO_ID_CONDITION,
+ TOMOYO_ID_NAME,
+ TOMOYO_ID_ACL,
+ TOMOYO_ID_DOMAIN,
+ TOMOYO_MAX_POLICY
+};
+
+/* Index numbers for domain's attributes. */
+enum tomoyo_domain_info_flags_index {
+ /* Quota warnning flag. */
+ TOMOYO_DIF_QUOTA_WARNED,
+ /*
+ * This domain was unable to create a new domain at
+ * tomoyo_find_next_domain() because the name of the domain to be
+ * created was too long or it could not allocate memory.
+ * More than one process continued execve() without domain transition.
+ */
+ TOMOYO_DIF_TRANSITION_FAILED,
+ TOMOYO_MAX_DOMAIN_INFO_FLAGS
+};
+
+/* Index numbers for audit type. */
+enum tomoyo_grant_log {
+ /* Follow profile's configuration. */
+ TOMOYO_GRANTLOG_AUTO,
+ /* Do not generate grant log. */
+ TOMOYO_GRANTLOG_NO,
+ /* Generate grant_log. */
+ TOMOYO_GRANTLOG_YES,
+};
+
+/* Index numbers for group entries. */
+enum tomoyo_group_id {
+ TOMOYO_PATH_GROUP,
+ TOMOYO_NUMBER_GROUP,
+ TOMOYO_ADDRESS_GROUP,
+ TOMOYO_MAX_GROUP
+};
+
+/* 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_RESET,
+ TOMOYO_TRANSITION_CONTROL_RESET,
+ 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,
+ TOMOYO_TYPE_INET_ACL,
+ TOMOYO_TYPE_UNIX_ACL,
+ TOMOYO_TYPE_ENV_ACL,
+ TOMOYO_TYPE_MANUAL_TASK_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
+};
+
+/* Index numbers for /sys/kernel/security/tomoyo/stat interface. */
+enum tomoyo_memory_stat_type {
+ TOMOYO_MEMORY_POLICY,
+ TOMOYO_MEMORY_AUDIT,
+ TOMOYO_MEMORY_QUERY,
+ TOMOYO_MAX_MEMORY_STAT
+};
+
+enum tomoyo_mkdev_acl_index {
+ TOMOYO_TYPE_MKBLOCK,
+ TOMOYO_TYPE_MKCHAR,
+ TOMOYO_MAX_MKDEV_OPERATION
+};
+
+/* Index numbers for socket operations. */
+enum tomoyo_network_acl_index {
+ TOMOYO_NETWORK_BIND, /* bind() operation. */
+ TOMOYO_NETWORK_LISTEN, /* listen() operation. */
+ TOMOYO_NETWORK_CONNECT, /* connect() operation. */
+ TOMOYO_NETWORK_SEND, /* send() operation. */
+ TOMOYO_MAX_NETWORK_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_PROCESS_STATUS,
+ TOMOYO_STAT,
+ TOMOYO_AUDIT,
+ 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_MAC_NETWORK_INET_STREAM_BIND,
+ TOMOYO_MAC_NETWORK_INET_STREAM_LISTEN,
+ TOMOYO_MAC_NETWORK_INET_STREAM_CONNECT,
+ TOMOYO_MAC_NETWORK_INET_DGRAM_BIND,
+ TOMOYO_MAC_NETWORK_INET_DGRAM_SEND,
+ TOMOYO_MAC_NETWORK_INET_RAW_BIND,
+ TOMOYO_MAC_NETWORK_INET_RAW_SEND,
+ TOMOYO_MAC_NETWORK_UNIX_STREAM_BIND,
+ TOMOYO_MAC_NETWORK_UNIX_STREAM_LISTEN,
+ TOMOYO_MAC_NETWORK_UNIX_STREAM_CONNECT,
+ TOMOYO_MAC_NETWORK_UNIX_DGRAM_BIND,
+ TOMOYO_MAC_NETWORK_UNIX_DGRAM_SEND,
+ TOMOYO_MAC_NETWORK_UNIX_SEQPACKET_BIND,
+ TOMOYO_MAC_NETWORK_UNIX_SEQPACKET_LISTEN,
+ TOMOYO_MAC_NETWORK_UNIX_SEQPACKET_CONNECT,
+ TOMOYO_MAC_ENVIRON,
+ TOMOYO_MAX_MAC_INDEX
+};
+
+/* Index numbers for category of functionality. */
+enum tomoyo_mac_category_index {
+ TOMOYO_MAC_CATEGORY_FILE,
+ TOMOYO_MAC_CATEGORY_NETWORK,
+ TOMOYO_MAC_CATEGORY_MISC,
+ 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
+
+/* Index numbers for /sys/kernel/security/tomoyo/stat interface. */
+enum tomoyo_policy_stat_type {
+ /* Do not change this order. */
+ TOMOYO_STAT_POLICY_UPDATES,
+ TOMOYO_STAT_POLICY_LEARNING, /* == TOMOYO_CONFIG_LEARNING */
+ TOMOYO_STAT_POLICY_PERMISSIVE, /* == TOMOYO_CONFIG_PERMISSIVE */
+ TOMOYO_STAT_POLICY_ENFORCING, /* == TOMOYO_CONFIG_ENFORCING */
+ TOMOYO_MAX_POLICY_STAT
+};
+
+/* Index numbers for profile's PREFERENCE values. */
+enum tomoyo_pref_index {
+ TOMOYO_PREF_MAX_AUDIT_LOG,
+ TOMOYO_PREF_MAX_LEARNING_ENTRY,
+ TOMOYO_MAX_PREF
+};
+
+/********** Structure definitions. **********/
+
+/* Common header for holding ACL entries. */
+struct tomoyo_acl_head {
+ struct list_head list;
+ s8 is_deleted; /* true or false or TOMOYO_GC_IN_PROGRESS */
+} __packed;
+
+/* Common header for shared entries. */
+struct tomoyo_shared_acl_head {
+ struct list_head list;
+ atomic_t users;
+} __packed;
+
+struct tomoyo_policy_namespace;
+
+/* Structure for request info. */
+struct tomoyo_request_info {
+ /*
+ * For holding parameters specific to operations which deal files.
+ * NULL if not dealing files.
+ */
+ struct tomoyo_obj_info *obj;
+ /*
+ * For holding parameters specific to execve() request.
+ * NULL if not dealing execve().
+ */
+ struct tomoyo_execve *ee;
+ 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 *name;
+ } environ;
+ struct {
+ const __be32 *address;
+ u16 port;
+ /* One of values smaller than TOMOYO_SOCK_MAX. */
+ u8 protocol;
+ /* One of values in "enum tomoyo_network_acl_index". */
+ u8 operation;
+ bool is_ipv6;
+ } inet_network;
+ struct {
+ const struct tomoyo_path_info *address;
+ /* One of values smaller than TOMOYO_SOCK_MAX. */
+ u8 protocol;
+ /* One of values in "enum tomoyo_network_acl_index". */
+ u8 operation;
+ } unix_network;
+ 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;
+ struct {
+ const struct tomoyo_path_info *domainname;
+ } task;
+ } param;
+ struct tomoyo_acl_info *matched_acl;
+ 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 holding an IP address. */
+struct tomoyo_ipaddr_union {
+ struct in6_addr ip[2]; /* Big endian. */
+ struct tomoyo_group *group; /* Pointer to address group. */
+ bool is_ipv6; /* Valid only if @group == NULL. */
+};
+
+/* Structure for "path_group"/"number_group"/"address_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;
+};
+
+/* Structure for "address_group" directive. */
+struct tomoyo_address_group {
+ struct tomoyo_acl_head head;
+ /* Structure for holding an IP address. */
+ struct tomoyo_ipaddr_union address;
+};
+
+/* Subset of "struct stat". Used by conditional ACL and audit logs. */
+struct tomoyo_mini_stat {
+ kuid_t uid;
+ kgid_t gid;
+ ino_t ino;
+ umode_t mode;
+ dev_t dev;
+ dev_t rdev;
+};
+
+/* Structure for dumping argv[] and envp[] of "struct linux_binprm". */
+struct tomoyo_page_dump {
+ struct page *page; /* Previously dumped page. */
+ char *data; /* Contents of "page". Size is PAGE_SIZE. */
+};
+
+/* Structure for attribute checks in addition to pathname checks. */
+struct tomoyo_obj_info {
+ /*
+ * True if tomoyo_get_attributes() was already called, false otherwise.
+ */
+ bool validate_done;
+ /* True if @stat[] is valid. */
+ bool stat_valid[TOMOYO_MAX_PATH_STAT];
+ /* First pathname. Initialized with { NULL, NULL } if no path. */
+ struct path path1;
+ /* Second pathname. Initialized with { NULL, NULL } if no path. */
+ struct path path2;
+ /*
+ * Information on @path1, @path1's parent directory, @path2, @path2's
+ * parent directory.
+ */
+ struct tomoyo_mini_stat stat[TOMOYO_MAX_PATH_STAT];
+ /*
+ * Content of symbolic link to be created. NULL for operations other
+ * than symlink().
+ */
+ struct tomoyo_path_info *symlink_target;
+};
+
+/* Structure for argv[]. */
+struct tomoyo_argv {
+ unsigned long index;
+ const struct tomoyo_path_info *value;
+ bool is_not;
+};
+
+/* Structure for envp[]. */
+struct tomoyo_envp {
+ const struct tomoyo_path_info *name;
+ const struct tomoyo_path_info *value;
+ bool is_not;
+};
+
+/* Structure for execve() operation. */
+struct tomoyo_execve {
+ struct tomoyo_request_info r;
+ struct tomoyo_obj_info obj;
+ struct linux_binprm *bprm;
+ const struct tomoyo_path_info *transition;
+ /* For dumping argv[] and envp[]. */
+ struct tomoyo_page_dump dump;
+ /* For temporary use. */
+ char *tmp; /* Size is TOMOYO_EXEC_TMPSIZE bytes */
+};
+
+/* Structure for entries which follows "struct tomoyo_condition". */
+struct tomoyo_condition_element {
+ /*
+ * Left hand operand. A "struct tomoyo_argv" for TOMOYO_ARGV_ENTRY, a
+ * "struct tomoyo_envp" for TOMOYO_ENVP_ENTRY is attached to the tail
+ * of the array of this struct.
+ */
+ u8 left;
+ /*
+ * Right hand operand. A "struct tomoyo_number_union" for
+ * TOMOYO_NUMBER_UNION, a "struct tomoyo_name_union" for
+ * TOMOYO_NAME_UNION is attached to the tail of the array of this
+ * struct.
+ */
+ u8 right;
+ /* Equation operator. True if equals or overlaps, false otherwise. */
+ bool equals;
+};
+
+/* Structure for optional arguments. */
+struct tomoyo_condition {
+ struct tomoyo_shared_acl_head head;
+ u32 size; /* Memory size allocated for this entry. */
+ u16 condc; /* Number of conditions in this struct. */
+ u16 numbers_count; /* Number of "struct tomoyo_number_union values". */
+ u16 names_count; /* Number of "struct tomoyo_name_union names". */
+ u16 argc; /* Number of "struct tomoyo_argv". */
+ u16 envc; /* Number of "struct tomoyo_envp". */
+ u8 grant_log; /* One of values in "enum tomoyo_grant_log". */
+ const struct tomoyo_path_info *transit; /* Maybe NULL. */
+ /*
+ * struct tomoyo_condition_element condition[condc];
+ * struct tomoyo_number_union values[numbers_count];
+ * struct tomoyo_name_union names[names_count];
+ * struct tomoyo_argv argv[argc];
+ * struct tomoyo_envp envp[envc];
+ */
+};
+
+/* Common header for individual entries. */
+struct tomoyo_acl_info {
+ struct list_head list;
+ struct tomoyo_condition *cond; /* Maybe NULL. */
+ s8 is_deleted; /* true or false or TOMOYO_GC_IN_PROGRESS */
+ 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;
+ /* Namespace for this domain. Never NULL. */
+ struct tomoyo_policy_namespace *ns;
+ /* Group numbers to use. */
+ unsigned long group[TOMOYO_MAX_ACL_GROUPS / BITS_PER_LONG];
+ u8 profile; /* Profile number to use. */
+ bool is_deleted; /* Delete flag. */
+ bool flags[TOMOYO_MAX_DOMAIN_INFO_FLAGS];
+ atomic_t users; /* Number of referring tasks. */
+};
+
+/*
+ * Structure for "task manual_domain_transition" directive.
+ */
+struct tomoyo_task_acl {
+ struct tomoyo_acl_info head; /* type = TOMOYO_TYPE_MANUAL_TASK_ACL */
+ /* Pointer to domainname. */
+ const struct tomoyo_path_info *domainname;
+};
+
+/*
+ * 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 "misc env" directive in domain policy. */
+struct tomoyo_env_acl {
+ struct tomoyo_acl_info head; /* type = TOMOYO_TYPE_ENV_ACL */
+ const struct tomoyo_path_info *env; /* environment variable */
+};
+
+/* Structure for "network inet" directive. */
+struct tomoyo_inet_acl {
+ struct tomoyo_acl_info head; /* type = TOMOYO_TYPE_INET_ACL */
+ u8 protocol;
+ u8 perm; /* Bitmask of values in "enum tomoyo_network_acl_index" */
+ struct tomoyo_ipaddr_union address;
+ struct tomoyo_number_union port;
+};
+
+/* Structure for "network unix" directive. */
+struct tomoyo_unix_acl {
+ struct tomoyo_acl_info head; /* type = TOMOYO_TYPE_UNIX_ACL */
+ u8 protocol;
+ u8 perm; /* Bitmask of values in "enum tomoyo_network_acl_index" */
+ struct tomoyo_name_union name;
+};
+
+/* Structure for holding a line from /sys/kernel/security/tomoyo/ interface. */
+struct tomoyo_acl_param {
+ char *data;
+ struct list_head *list;
+ struct tomoyo_policy_namespace *ns;
+ 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 *head);
+ int (*write)(struct tomoyo_io_buffer *head);
+ __poll_t (*poll)(struct file *file, poll_table *wait);
+ /* Exclusive lock for this structure. */
+ struct mutex io_sem;
+ char __user *read_user_buf;
+ size_t read_user_buf_avail;
+ struct {
+ struct list_head *ns;
+ struct list_head *domain;
+ struct list_head *group;
+ struct list_head *acl;
+ size_t avail;
+ unsigned int step;
+ unsigned int query_index;
+ u16 index;
+ u16 cond_index;
+ u8 acl_group_index;
+ u8 cond_step;
+ u8 bit;
+ u8 w_pos;
+ bool eof;
+ bool print_this_domain_only;
+ bool print_transition_related_only;
+ bool print_cond_part;
+ const char *w[TOMOYO_MAX_IO_READ_QUEUE];
+ } r;
+ struct {
+ struct tomoyo_policy_namespace *ns;
+ /* The position currently writing to. */
+ struct tomoyo_domain_info *domain;
+ /* Bytes available for writing. */
+ size_t avail;
+ bool is_delete;
+ } w;
+ /* Buffer for reading. */
+ char *read_buf;
+ /* Size of read buffer. */
+ size_t readbuf_size;
+ /* Buffer for writing. */
+ char *write_buf;
+ /* Size of write buffer. */
+ size_t writebuf_size;
+ /* Type of this interface. */
+ enum tomoyo_securityfs_interface_index type;
+ /* Users counter protected by tomoyo_io_buffer_list_lock. */
+ u8 users;
+ /* List for telling GC not to kfree() elements. */
+ struct list_head list;
+};
+
+/*
+ * 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;
+ /* 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];
+ unsigned int pref[TOMOYO_MAX_PREF];
+};
+
+/* Structure for representing YYYY/MM/DD hh/mm/ss. */
+struct tomoyo_time {
+ u16 year;
+ u8 month;
+ u8 day;
+ u8 hour;
+ u8 min;
+ u8 sec;
+};
+
+/* Structure for policy namespace. */
+struct tomoyo_policy_namespace {
+ /* Profile table. Memory is allocated as needed. */
+ struct tomoyo_profile *profile_ptr[TOMOYO_MAX_PROFILES];
+ /* List of "struct tomoyo_group". */
+ struct list_head group_list[TOMOYO_MAX_GROUP];
+ /* List of policy. */
+ struct list_head policy_list[TOMOYO_MAX_POLICY];
+ /* The global ACL referred by "use_group" keyword. */
+ struct list_head acl_group[TOMOYO_MAX_ACL_GROUPS];
+ /* List for connecting to tomoyo_namespace_list list. */
+ struct list_head namespace_list;
+ /* Profile version. Currently only 20150505 is defined. */
+ unsigned int profile_version;
+ /* Name of this namespace (e.g. "<kernel>", "</usr/sbin/httpd>" ). */
+ const char *name;
+};
+
+/* Structure for "struct task_struct"->security. */
+struct tomoyo_task {
+ struct tomoyo_domain_info *domain_info;
+ struct tomoyo_domain_info *old_domain_info;
+};
+
+/********** Function prototypes. **********/
+
+bool tomoyo_address_matches_group(const bool is_ipv6, const __be32 *address,
+ const struct tomoyo_group *group);
+bool tomoyo_compare_number_union(const unsigned long value,
+ const struct tomoyo_number_union *ptr);
+bool tomoyo_condition(struct tomoyo_request_info *r,
+ const struct tomoyo_condition *cond);
+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_domain_quota_is_ok(struct tomoyo_request_info *r);
+bool tomoyo_dump_page(struct linux_binprm *bprm, unsigned long pos,
+ struct tomoyo_page_dump *dump);
+bool tomoyo_memory_ok(void *ptr);
+bool tomoyo_number_matches_group(const unsigned long min,
+ const unsigned long max,
+ const struct tomoyo_group *group);
+bool tomoyo_parse_ipaddr_union(struct tomoyo_acl_param *param,
+ struct tomoyo_ipaddr_union *ptr);
+bool tomoyo_parse_name_union(struct tomoyo_acl_param *param,
+ struct tomoyo_name_union *ptr);
+bool tomoyo_parse_number_union(struct tomoyo_acl_param *param,
+ struct tomoyo_number_union *ptr);
+bool tomoyo_path_matches_pattern(const struct tomoyo_path_info *filename,
+ const struct tomoyo_path_info *pattern);
+bool tomoyo_permstr(const char *string, const char *keyword);
+bool tomoyo_str_starts(char **src, const char *find);
+char *tomoyo_encode(const char *str);
+char *tomoyo_encode2(const char *str, int str_len);
+char *tomoyo_init_log(struct tomoyo_request_info *r, int len, const char *fmt,
+ va_list args);
+char *tomoyo_read_token(struct tomoyo_acl_param *param);
+char *tomoyo_realpath_from_path(const struct path *path);
+char *tomoyo_realpath_nofollow(const char *pathname);
+const char *tomoyo_get_exe(void);
+const struct tomoyo_path_info *tomoyo_compare_name_union
+(const struct tomoyo_path_info *name, const struct tomoyo_name_union *ptr);
+const struct tomoyo_path_info *tomoyo_get_domainname
+(struct tomoyo_acl_param *param);
+const struct tomoyo_path_info *tomoyo_get_name(const char *name);
+const struct tomoyo_path_info *tomoyo_path_matches_group
+(const struct tomoyo_path_info *pathname, const struct tomoyo_group *group);
+int tomoyo_check_open_permission(struct tomoyo_domain_info *domain,
+ const struct path *path, const int flag);
+void tomoyo_close_control(struct tomoyo_io_buffer *head);
+int tomoyo_env_perm(struct tomoyo_request_info *r, const char *env);
+int tomoyo_execute_permission(struct tomoyo_request_info *r,
+ const struct tomoyo_path_info *filename);
+int tomoyo_find_next_domain(struct linux_binprm *bprm);
+int tomoyo_get_mode(const struct tomoyo_policy_namespace *ns, const u8 profile,
+ const u8 index);
+int tomoyo_init_request_info(struct tomoyo_request_info *r,
+ struct tomoyo_domain_info *domain,
+ const u8 index);
+int tomoyo_mkdev_perm(const u8 operation, const struct path *path,
+ const unsigned int mode, unsigned int dev);
+int tomoyo_mount_permission(const char *dev_name, const struct path *path,
+ const char *type, unsigned long flags,
+ void *data_page);
+int tomoyo_open_control(const u8 type, struct file *file);
+int tomoyo_path2_perm(const u8 operation, const struct path *path1,
+ const struct path *path2);
+int tomoyo_path_number_perm(const u8 operation, const struct path *path,
+ unsigned long number);
+int tomoyo_path_perm(const u8 operation, const struct path *path,
+ const char *target);
+__poll_t tomoyo_poll_control(struct file *file, poll_table *wait);
+__poll_t tomoyo_poll_log(struct file *file, poll_table *wait);
+int tomoyo_socket_bind_permission(struct socket *sock, struct sockaddr *addr,
+ int addr_len);
+int tomoyo_socket_connect_permission(struct socket *sock,
+ struct sockaddr *addr, int addr_len);
+int tomoyo_socket_listen_permission(struct socket *sock);
+int tomoyo_socket_sendmsg_permission(struct socket *sock, struct msghdr *msg,
+ int size);
+int tomoyo_supervisor(struct tomoyo_request_info *r, const char *fmt, ...)
+ __printf(2, 3);
+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 *));
+int tomoyo_write_aggregator(struct tomoyo_acl_param *param);
+int tomoyo_write_file(struct tomoyo_acl_param *param);
+int tomoyo_write_group(struct tomoyo_acl_param *param, const u8 type);
+int tomoyo_write_misc(struct tomoyo_acl_param *param);
+int tomoyo_write_inet_network(struct tomoyo_acl_param *param);
+int tomoyo_write_transition_control(struct tomoyo_acl_param *param,
+ const u8 type);
+int tomoyo_write_unix_network(struct tomoyo_acl_param *param);
+ssize_t tomoyo_read_control(struct tomoyo_io_buffer *head, char __user *buffer,
+ const int buffer_len);
+ssize_t tomoyo_write_control(struct tomoyo_io_buffer *head,
+ const char __user *buffer, const int buffer_len);
+struct tomoyo_condition *tomoyo_get_condition(struct tomoyo_acl_param *param);
+struct tomoyo_domain_info *tomoyo_assign_domain(const char *domainname,
+ const bool transit);
+struct tomoyo_domain_info *tomoyo_domain(void);
+struct tomoyo_domain_info *tomoyo_find_domain(const char *domainname);
+struct tomoyo_group *tomoyo_get_group(struct tomoyo_acl_param *param,
+ const u8 idx);
+struct tomoyo_policy_namespace *tomoyo_assign_namespace
+(const char *domainname);
+struct tomoyo_profile *tomoyo_profile(const struct tomoyo_policy_namespace *ns,
+ const u8 profile);
+unsigned int tomoyo_check_flags(const struct tomoyo_domain_info *domain,
+ const u8 index);
+u8 tomoyo_parse_ulong(unsigned long *result, char **str);
+void *tomoyo_commit_ok(void *data, const unsigned int size);
+void __init tomoyo_load_builtin_policy(void);
+void __init tomoyo_mm_init(void);
+void tomoyo_check_acl(struct tomoyo_request_info *r,
+ bool (*check_entry)(struct tomoyo_request_info *,
+ const struct tomoyo_acl_info *));
+void tomoyo_check_profile(void);
+void tomoyo_convert_time(time64_t time, struct tomoyo_time *stamp);
+void tomoyo_del_condition(struct list_head *element);
+void tomoyo_fill_path_info(struct tomoyo_path_info *ptr);
+void tomoyo_get_attributes(struct tomoyo_obj_info *obj);
+void tomoyo_init_policy_namespace(struct tomoyo_policy_namespace *ns);
+void tomoyo_load_policy(const char *filename);
+void tomoyo_normalize_line(unsigned char *buffer);
+void tomoyo_notify_gc(struct tomoyo_io_buffer *head, const bool is_register);
+void tomoyo_print_ip(char *buf, const unsigned int size,
+ const struct tomoyo_ipaddr_union *ptr);
+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_put_number_union(struct tomoyo_number_union *ptr);
+void tomoyo_read_log(struct tomoyo_io_buffer *head);
+void tomoyo_update_stat(const u8 index);
+void tomoyo_warn_oom(const char *function);
+void tomoyo_write_log(struct tomoyo_request_info *r, const char *fmt, ...)
+ __printf(2, 3);
+void tomoyo_write_log2(struct tomoyo_request_info *r, int len, const char *fmt,
+ va_list args);
+
+/********** External variable definitions. **********/
+
+extern bool tomoyo_policy_loaded;
+extern int tomoyo_enabled;
+extern const char * const tomoyo_condition_keyword
+[TOMOYO_MAX_CONDITION_KEYWORD];
+extern const char * const tomoyo_dif[TOMOYO_MAX_DOMAIN_INFO_FLAGS];
+extern const char * const tomoyo_mac_keywords[TOMOYO_MAX_MAC_INDEX
+ + TOMOYO_MAX_MAC_CATEGORY_INDEX];
+extern const char * const tomoyo_mode[TOMOYO_CONFIG_MAX_MODE];
+extern const char * const tomoyo_path_keyword[TOMOYO_MAX_PATH_OPERATION];
+extern const char * const tomoyo_proto_keyword[TOMOYO_SOCK_MAX];
+extern const char * const tomoyo_socket_keyword[TOMOYO_MAX_NETWORK_OPERATION];
+extern const u8 tomoyo_index2category[TOMOYO_MAX_MAC_INDEX];
+extern const u8 tomoyo_pn2mac[TOMOYO_MAX_PATH_NUMBER_OPERATION];
+extern const u8 tomoyo_pnnn2mac[TOMOYO_MAX_MKDEV_OPERATION];
+extern const u8 tomoyo_pp2mac[TOMOYO_MAX_PATH2_OPERATION];
+extern struct list_head tomoyo_condition_list;
+extern struct list_head tomoyo_domain_list;
+extern struct list_head tomoyo_name_list[TOMOYO_MAX_HASH];
+extern struct list_head tomoyo_namespace_list;
+extern struct mutex tomoyo_policy_lock;
+extern struct srcu_struct tomoyo_ss;
+extern struct tomoyo_domain_info tomoyo_kernel_domain;
+extern struct tomoyo_policy_namespace tomoyo_kernel_namespace;
+extern unsigned int tomoyo_memory_quota[TOMOYO_MAX_MEMORY_STAT];
+extern unsigned int tomoyo_memory_used[TOMOYO_MAX_MEMORY_STAT];
+extern struct lsm_blob_sizes tomoyo_blob_sizes;
+
+/********** 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_sys_getppid - Copy of getppid().
+ *
+ * Returns parent process's PID.
+ *
+ * Alpha does not have getppid() defined. To be able to build this module on
+ * Alpha, I have to copy getppid() from kernel/timer.c.
+ */
+static inline pid_t tomoyo_sys_getppid(void)
+{
+ pid_t pid;
+
+ rcu_read_lock();
+ pid = task_tgid_vnr(rcu_dereference(current->real_parent));
+ rcu_read_unlock();
+ return pid;
+}
+
+/**
+ * tomoyo_sys_getpid - Copy of getpid().
+ *
+ * Returns current thread's PID.
+ *
+ * Alpha does not have getpid() defined. To be able to build this module on
+ * Alpha, I have to copy getpid() from kernel/timer.c.
+ */
+static inline pid_t tomoyo_sys_getpid(void)
+{
+ return task_tgid_vnr(current);
+}
+
+/**
+ * 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_condition - Drop reference on "struct tomoyo_condition".
+ *
+ * @cond: Pointer to "struct tomoyo_condition". Maybe NULL.
+ *
+ * Returns nothing.
+ */
+static inline void tomoyo_put_condition(struct tomoyo_condition *cond)
+{
+ if (cond)
+ atomic_dec(&cond->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_task - Get "struct tomoyo_task" for specified thread.
+ *
+ * @task - Pointer to "struct task_struct".
+ *
+ * Returns pointer to "struct tomoyo_task" for specified thread.
+ */
+static inline struct tomoyo_task *tomoyo_task(struct task_struct *task)
+{
+ return task->security + tomoyo_blob_sizes.lbs_task;
+}
+
+/**
+ * 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];
+}
+
+/**
+ * tomoyo_same_ipaddr_union - Check for duplicated "struct tomoyo_ipaddr_union" entry.
+ *
+ * @a: Pointer to "struct tomoyo_ipaddr_union".
+ * @b: Pointer to "struct tomoyo_ipaddr_union".
+ *
+ * Returns true if @a == @b, false otherwise.
+ */
+static inline bool tomoyo_same_ipaddr_union
+(const struct tomoyo_ipaddr_union *a, const struct tomoyo_ipaddr_union *b)
+{
+ return !memcmp(a->ip, b->ip, sizeof(a->ip)) && a->group == b->group &&
+ a->is_ipv6 == b->is_ipv6;
+}
+
+/**
+ * tomoyo_current_namespace - Get "struct tomoyo_policy_namespace" for current thread.
+ *
+ * Returns pointer to "struct tomoyo_policy_namespace" for current thread.
+ */
+static inline struct tomoyo_policy_namespace *tomoyo_current_namespace(void)
+{
+ return tomoyo_domain()->ns;
+}
+
+#if defined(CONFIG_SLOB)
+
+/**
+ * tomoyo_round2 - Round up to power of 2 for calculating memory usage.
+ *
+ * @size: Size to be rounded up.
+ *
+ * Returns @size.
+ *
+ * Since SLOB does not round up, this function simply returns @size.
+ */
+static inline int tomoyo_round2(size_t size)
+{
+ return size;
+}
+
+#else
+
+/**
+ * tomoyo_round2 - Round up to power of 2 for calculating memory usage.
+ *
+ * @size: Size to be rounded up.
+ *
+ * Returns rounded size.
+ *
+ * Strictly speaking, SLAB may be able to allocate (e.g.) 96 bytes instead of
+ * (e.g.) 128 bytes.
+ */
+static inline int tomoyo_round2(size_t size)
+{
+#if PAGE_SIZE == 4096
+ size_t bsize = 32;
+#else
+ size_t bsize = 64;
+#endif
+ if (!size)
+ return 0;
+ while (size > bsize)
+ bsize <<= 1;
+ return bsize;
+}
+
+#endif
+
+/**
+ * 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) */