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Diffstat (limited to 'security/tomoyo/common.h')
| -rw-r--r-- | security/tomoyo/common.h | 1334 |
1 files changed, 1334 insertions, 0 deletions
diff --git a/security/tomoyo/common.h b/security/tomoyo/common.h new file mode 100644 index 000000000..85246b9df --- /dev/null +++ b/security/tomoyo/common.h @@ -0,0 +1,1334 @@ +/* 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 char *tomoyo_yesno(const unsigned int value); +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) */ |