/* * 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 #include #include #include #include #include #include #include #include #include #include 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<. */ #define TOMOYO_ROOT_NAME "" #define TOMOYO_ROOT_NAME_LEN (sizeof(TOMOYO_ROOT_NAME) - 1) /* Value type definition. */ #define TOMOYO_VALUE_TYPE_INVALID 0 #define TOMOYO_VALUE_TYPE_DECIMAL 1 #define TOMOYO_VALUE_TYPE_OCTAL 2 #define TOMOYO_VALUE_TYPE_HEXADECIMAL 3 /* Index numbers for Access Controls. */ enum tomoyo_mac_index { TOMOYO_MAC_FOR_FILE, /* domain_policy.conf */ TOMOYO_MAX_ACCEPT_ENTRY, TOMOYO_VERBOSE, TOMOYO_MAX_CONTROL_INDEX }; /* Index numbers for Access Controls. */ enum tomoyo_acl_entry_type_index { TOMOYO_TYPE_PATH_ACL, TOMOYO_TYPE_PATH2_ACL, }; /* Index numbers for File Controls. */ /* * TYPE_READ_WRITE_ACL is special. TYPE_READ_WRITE_ACL is automatically set * if both TYPE_READ_ACL and TYPE_WRITE_ACL are set. Both TYPE_READ_ACL and * TYPE_WRITE_ACL are automatically set if TYPE_READ_WRITE_ACL is set. * TYPE_READ_WRITE_ACL is automatically cleared if either TYPE_READ_ACL or * TYPE_WRITE_ACL is cleared. Both TYPE_READ_ACL and TYPE_WRITE_ACL are * automatically cleared if TYPE_READ_WRITE_ACL is cleared. */ enum tomoyo_path_acl_index { TOMOYO_TYPE_READ_WRITE, TOMOYO_TYPE_EXECUTE, TOMOYO_TYPE_READ, TOMOYO_TYPE_WRITE, TOMOYO_TYPE_CREATE, TOMOYO_TYPE_UNLINK, TOMOYO_TYPE_MKDIR, TOMOYO_TYPE_RMDIR, TOMOYO_TYPE_MKFIFO, TOMOYO_TYPE_MKSOCK, TOMOYO_TYPE_MKBLOCK, TOMOYO_TYPE_MKCHAR, TOMOYO_TYPE_TRUNCATE, TOMOYO_TYPE_SYMLINK, TOMOYO_TYPE_REWRITE, TOMOYO_TYPE_IOCTL, TOMOYO_TYPE_CHMOD, TOMOYO_TYPE_CHOWN, TOMOYO_TYPE_CHGRP, TOMOYO_TYPE_CHROOT, TOMOYO_TYPE_MOUNT, TOMOYO_TYPE_UMOUNT, TOMOYO_MAX_PATH_OPERATION }; enum tomoyo_path2_acl_index { TOMOYO_TYPE_LINK, TOMOYO_TYPE_RENAME, TOMOYO_TYPE_PIVOT_ROOT, TOMOYO_MAX_PATH2_OPERATION }; enum tomoyo_securityfs_interface_index { TOMOYO_DOMAINPOLICY, TOMOYO_EXCEPTIONPOLICY, TOMOYO_DOMAIN_STATUS, TOMOYO_PROCESS_STATUS, TOMOYO_MEMINFO, TOMOYO_SELFDOMAIN, TOMOYO_VERSION, TOMOYO_PROFILE, TOMOYO_MANAGER }; /********** Structure definitions. **********/ /* * tomoyo_page_buffer is a structure which is used for holding a pathname * obtained from "struct dentry" and "struct vfsmount" pair. * As of now, it is 4096 bytes. If users complain that 4096 bytes is too small * (because TOMOYO escapes non ASCII printable characters using \ooo format), * we will make the buffer larger. */ struct tomoyo_page_buffer { char buffer[4096]; }; /* * tomoyo_request_info is a structure which is used for holding * * (1) Domain information of current process. * (2) Access control mode of the profile. */ struct tomoyo_request_info { struct tomoyo_domain_info *domain; u8 mode; /* One of tomoyo_mode_index . */ }; /* * tomoyo_path_info is a structure which is used for holding a string data * used by TOMOYO. * This structure has several fields for supporting pattern matching. * * (1) "name" is the '\0' terminated string data. * (2) "hash" is full_name_hash(name, strlen(name)). * This allows tomoyo_pathcmp() to compare by hash before actually compare * using strcmp(). * (3) "const_len" is the length of the initial segment of "name" which * consists entirely of non wildcard characters. In other words, the length * which we can compare two strings using strncmp(). * (4) "is_dir" is a bool which is true if "name" ends with "/", * false otherwise. * TOMOYO distinguishes directory and non-directory. A directory ends with * "/" and non-directory does not end with "/". * (5) "is_patterned" is a bool which is true if "name" contains wildcard * characters, false otherwise. This allows TOMOYO to use "hash" and * strcmp() for string comparison if "is_patterned" is false. */ 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) */ }; /* * tomoyo_name_entry is a structure which is used for linking * "struct tomoyo_path_info" into tomoyo_name_list . */ struct tomoyo_name_entry { struct list_head list; atomic_t users; struct tomoyo_path_info entry; }; /* * tomoyo_path_info_with_data is a structure which is used for holding a * pathname obtained from "struct dentry" and "struct vfsmount" pair. * * "struct tomoyo_path_info_with_data" consists of "struct tomoyo_path_info" * and buffer for the pathname, while "struct tomoyo_page_buffer" consists of * buffer for the pathname only. * * "struct tomoyo_path_info_with_data" is intended to allow TOMOYO to release * both "struct tomoyo_path_info" and buffer for the pathname by single kfree() * so that we don't need to return two pointers to the caller. If the caller * puts "struct tomoyo_path_info" on stack memory, we will be able to remove * "struct tomoyo_path_info_with_data". */ struct tomoyo_path_info_with_data { /* Keep "head" first, for this pointer is passed to kfree(). */ struct tomoyo_path_info head; char barrier1[16]; /* Safeguard for overrun. */ char body[TOMOYO_MAX_PATHNAME_LEN]; char barrier2[16]; /* Safeguard for overrun. */ }; struct tomoyo_name_union { const struct tomoyo_path_info *filename; struct tomoyo_path_group *group; u8 is_group; }; struct tomoyo_number_union { unsigned long values[2]; struct tomoyo_number_group *group; u8 min_type; u8 max_type; u8 is_group; }; /* Structure for "path_group" directive. */ struct tomoyo_path_group { struct list_head list; const struct tomoyo_path_info *group_name; struct list_head member_list; atomic_t users; }; /* Structure for "number_group" directive. */ struct tomoyo_number_group { struct list_head list; const struct tomoyo_path_info *group_name; struct list_head member_list; atomic_t users; }; /* Structure for "path_group" directive. */ struct tomoyo_path_group_member { struct list_head list; bool is_deleted; const struct tomoyo_path_info *member_name; }; /* Structure for "number_group" directive. */ struct tomoyo_number_group_member { struct list_head list; bool is_deleted; struct tomoyo_number_union number; }; /* * tomoyo_acl_info is a structure which is used for holding * * (1) "list" which is linked to the ->acl_info_list of * "struct tomoyo_domain_info" * (2) "type" which tells type of the entry (either * "struct tomoyo_path_acl" or "struct tomoyo_path2_acl"). * * Packing "struct tomoyo_acl_info" allows * "struct tomoyo_path_acl" to embed "u8" + "u16" and * "struct tomoyo_path2_acl" to embed "u8" * without enlarging their structure size. */ struct tomoyo_acl_info { struct list_head list; u8 type; } __packed; /* * tomoyo_domain_info is a structure which is used for holding permissions * (e.g. "allow_read /lib/libc-2.5.so") given to each domain. * It has following fields. * * (1) "list" which is linked to tomoyo_domain_list . * (2) "acl_info_list" which is linked to "struct tomoyo_acl_info". * (3) "domainname" which holds the name of the domain. * (4) "profile" which remembers profile number assigned to this domain. * (5) "is_deleted" is a bool which is true if this domain is marked as * "deleted", false otherwise. * (6) "quota_warned" is a bool which is used for suppressing warning message * when learning mode learned too much entries. * (7) "ignore_global_allow_read" is a bool which is true if this domain * should ignore "allow_read" directive in exception policy. * (8) "transition_failed" is a bool which is set to true when 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. If set to true, more than one process continued execve() * without domain transition. * (9) "users" is an atomic_t that holds how many "struct cred"->security * are referring this "struct tomoyo_domain_info". If is_deleted == true * and users == 0, this struct will be kfree()d upon next garbage * collection. * * A domain's lifecycle is an analogy of files on / directory. * Multiple domains with the same domainname cannot be created (as with * creating files with the same filename fails with -EEXIST). * If a process reached a domain, that process can reside in that domain after * that domain is marked as "deleted" (as with a process can access an already * open()ed file after that file was unlink()ed). */ 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 ignore_global_allow_read; /* Ignore "allow_read" flag. */ bool transition_failed; /* Domain transition failed flag. */ atomic_t users; /* Number of referring credentials. */ }; /* * tomoyo_path_acl is a structure which is used for holding an * entry with one pathname operation (e.g. open(), mkdir()). * It has following fields. * * (1) "head" which is a "struct tomoyo_acl_info". * (2) "perm" which is a bitmask of permitted operations. * (3) "name" is the pathname. * * Directives held by this structure are "allow_read/write", "allow_execute", * "allow_read", "allow_write", "allow_create", "allow_unlink", "allow_mkdir", * "allow_rmdir", "allow_mkfifo", "allow_mksock", "allow_mkblock", * "allow_mkchar", "allow_truncate", "allow_symlink", "allow_rewrite", * "allow_ioctl", "allow_chmod", "allow_chown", "allow_chgrp", "allow_chroot", * "allow_mount" and "allow_unmount". */ struct tomoyo_path_acl { struct tomoyo_acl_info head; /* type = TOMOYO_TYPE_PATH_ACL */ u8 perm_high; u16 perm; struct tomoyo_name_union name; }; /* * tomoyo_path2_acl is a structure which is used for holding an * entry with two pathnames operation (i.e. link(), rename() and pivot_root()). * It has following fields. * * (1) "head" which is a "struct tomoyo_acl_info". * (2) "perm" which is a bitmask of permitted operations. * (3) "name1" is the source/old pathname. * (4) "name2" is the destination/new pathname. * * Directives held by this structure are "allow_rename", "allow_link" and * "allow_pivot_root". */ struct tomoyo_path2_acl { struct tomoyo_acl_info head; /* type = TOMOYO_TYPE_PATH2_ACL */ u8 perm; struct tomoyo_name_union name1; struct tomoyo_name_union name2; }; /* * tomoyo_io_buffer is a structure which is used for reading and modifying * configuration via /sys/kernel/security/tomoyo/ interface. * It has many fields. ->read_var1 , ->read_var2 , ->write_var1 are used as * cursors. * * Since the content of /sys/kernel/security/tomoyo/domain_policy is a list of * "struct tomoyo_domain_info" entries and each "struct tomoyo_domain_info" * entry has a list of "struct tomoyo_acl_info", we need two cursors when * reading (one is for traversing tomoyo_domain_list and the other is for * traversing "struct tomoyo_acl_info"->acl_info_list ). * * If a line written to /sys/kernel/security/tomoyo/domain_policy starts with * "select ", TOMOYO seeks the cursor ->read_var1 and ->write_var1 to the * domain with the domainname specified by the rest of that line (NULL is set * if seek failed). * If a line written to /sys/kernel/security/tomoyo/domain_policy starts with * "delete ", TOMOYO deletes an entry or a domain specified by the rest of that * line (->write_var1 is set to NULL if a domain was deleted). * If a line written to /sys/kernel/security/tomoyo/domain_policy starts with * neither "select " nor "delete ", an entry or a domain specified by that line * is appended. */ struct tomoyo_io_buffer { int (*read) (struct tomoyo_io_buffer *); int (*write) (struct tomoyo_io_buffer *); /* Exclusive lock for this structure. */ struct mutex io_sem; /* Index returned by tomoyo_read_lock(). */ int reader_idx; /* The position currently reading from. */ struct list_head *read_var1; /* Extra variables for reading. */ struct list_head *read_var2; /* The position currently writing to. */ struct tomoyo_domain_info *write_var1; /* The step for reading. */ int read_step; /* Buffer for reading. */ char *read_buf; /* EOF flag for reading. */ bool read_eof; /* Read domain ACL of specified PID? */ bool read_single_domain; /* Extra variable for reading. */ u8 read_bit; /* Bytes available for reading. */ int read_avail; /* Size of read buffer. */ int readbuf_size; /* Buffer for writing. */ char *write_buf; /* Bytes available for writing. */ int write_avail; /* Size of write buffer. */ int writebuf_size; }; /* * tomoyo_globally_readable_file_entry is a structure which is used for holding * "allow_read" entries. * It has following fields. * * (1) "list" which is linked to tomoyo_globally_readable_list . * (2) "filename" is a pathname which is allowed to open(O_RDONLY). * (3) "is_deleted" is a bool which is true if marked as deleted, false * otherwise. */ struct tomoyo_globally_readable_file_entry { struct list_head list; const struct tomoyo_path_info *filename; bool is_deleted; }; /* * tomoyo_pattern_entry is a structure which is used for holding * "tomoyo_pattern_list" entries. * It has following fields. * * (1) "list" which is linked to tomoyo_pattern_list . * (2) "pattern" is a pathname pattern which is used for converting pathnames * to pathname patterns during learning mode. * (3) "is_deleted" is a bool which is true if marked as deleted, false * otherwise. */ struct tomoyo_pattern_entry { struct list_head list; const struct tomoyo_path_info *pattern; bool is_deleted; }; /* * tomoyo_no_rewrite_entry is a structure which is used for holding * "deny_rewrite" entries. * It has following fields. * * (1) "list" which is linked to tomoyo_no_rewrite_list . * (2) "pattern" is a pathname which is by default not permitted to modify * already existing content. * (3) "is_deleted" is a bool which is true if marked as deleted, false * otherwise. */ struct tomoyo_no_rewrite_entry { struct list_head list; const struct tomoyo_path_info *pattern; bool is_deleted; }; /* * tomoyo_domain_initializer_entry is a structure which is used for holding * "initialize_domain" and "no_initialize_domain" entries. * It has following fields. * * (1) "list" which is linked to tomoyo_domain_initializer_list . * (2) "domainname" which is "a domainname" or "the last component of a * domainname". This field is NULL if "from" clause is not specified. * (3) "program" which is a program's pathname. * (4) "is_deleted" is a bool which is true if marked as deleted, false * otherwise. * (5) "is_not" is a bool which is true if "no_initialize_domain", false * otherwise. * (6) "is_last_name" is a bool which is true if "domainname" is "the last * component of a domainname", false otherwise. */ struct tomoyo_domain_initializer_entry { struct list_head list; const struct tomoyo_path_info *domainname; /* This may be NULL */ const struct tomoyo_path_info *program; bool is_deleted; bool is_not; /* True if this entry is "no_initialize_domain". */ /* True if the domainname is tomoyo_get_last_name(). */ bool is_last_name; }; /* * tomoyo_domain_keeper_entry is a structure which is used for holding * "keep_domain" and "no_keep_domain" entries. * It has following fields. * * (1) "list" which is linked to tomoyo_domain_keeper_list . * (2) "domainname" which is "a domainname" or "the last component of a * domainname". * (3) "program" which is a program's pathname. * This field is NULL if "from" clause is not specified. * (4) "is_deleted" is a bool which is true if marked as deleted, false * otherwise. * (5) "is_not" is a bool which is true if "no_initialize_domain", false * otherwise. * (6) "is_last_name" is a bool which is true if "domainname" is "the last * component of a domainname", false otherwise. */ struct tomoyo_domain_keeper_entry { struct list_head list; const struct tomoyo_path_info *domainname; const struct tomoyo_path_info *program; /* This may be NULL */ bool is_deleted; bool is_not; /* True if this entry is "no_keep_domain". */ /* True if the domainname is tomoyo_get_last_name(). */ bool is_last_name; }; /* * tomoyo_alias_entry is a structure which is used for holding "alias" entries. * It has following fields. * * (1) "list" which is linked to tomoyo_alias_list . * (2) "original_name" which is a dereferenced pathname. * (3) "aliased_name" which is a symlink's pathname. * (4) "is_deleted" is a bool which is true if marked as deleted, false * otherwise. */ struct tomoyo_alias_entry { struct list_head list; const struct tomoyo_path_info *original_name; const struct tomoyo_path_info *aliased_name; bool is_deleted; }; /* * tomoyo_policy_manager_entry is a structure which is used for holding list of * domainnames or programs which are permitted to modify configuration via * /sys/kernel/security/tomoyo/ interface. * It has following fields. * * (1) "list" which is linked to tomoyo_policy_manager_list . * (2) "manager" is a domainname or a program's pathname. * (3) "is_domain" is a bool which is true if "manager" is a domainname, false * otherwise. * (4) "is_deleted" is a bool which is true if marked as deleted, false * otherwise. */ struct tomoyo_policy_manager_entry { struct list_head list; /* A path to program or a domainname. */ const struct tomoyo_path_info *manager; bool is_domain; /* True if manager is a domainname. */ bool is_deleted; /* True if this entry is deleted. */ }; /********** Function prototypes. **********/ /* Check whether the given name matches the given name_union. */ bool tomoyo_compare_name_union(const struct tomoyo_path_info *name, const struct tomoyo_name_union *ptr); /* Check whether the domain has too many ACL entries to hold. */ bool tomoyo_domain_quota_is_ok(struct tomoyo_request_info *r); /* Transactional sprintf() for policy dump. */ bool tomoyo_io_printf(struct tomoyo_io_buffer *head, const char *fmt, ...) __attribute__ ((format(printf, 2, 3))); /* Check whether the domainname is correct. */ bool tomoyo_is_correct_domain(const unsigned char *domainname); /* Check whether the token is correct. */ bool tomoyo_is_correct_path(const char *filename, const s8 start_type, const s8 pattern_type, const s8 end_type); /* Check whether the token can be a domainname. */ bool tomoyo_is_domain_def(const unsigned char *buffer); bool tomoyo_parse_name_union(const char *filename, struct tomoyo_name_union *ptr); /* Check whether the given filename matches the given path_group. */ bool tomoyo_path_matches_group(const struct tomoyo_path_info *pathname, const struct tomoyo_path_group *group, const bool may_use_pattern); /* Check whether the given value matches the given number_group. */ bool tomoyo_number_matches_group(const unsigned long min, const unsigned long max, const struct tomoyo_number_group *group); /* Check whether the given filename matches the given pattern. */ bool tomoyo_path_matches_pattern(const struct tomoyo_path_info *filename, const struct tomoyo_path_info *pattern); bool tomoyo_print_number_union(struct tomoyo_io_buffer *head, const struct tomoyo_number_union *ptr); bool tomoyo_parse_number_union(char *data, struct tomoyo_number_union *num); /* Read "alias" entry in exception policy. */ bool tomoyo_read_alias_policy(struct tomoyo_io_buffer *head); /* * Read "initialize_domain" and "no_initialize_domain" entry * in exception policy. */ bool tomoyo_read_domain_initializer_policy(struct tomoyo_io_buffer *head); /* Read "keep_domain" and "no_keep_domain" entry in exception policy. */ bool tomoyo_read_domain_keeper_policy(struct tomoyo_io_buffer *head); /* Read "file_pattern" entry in exception policy. */ bool tomoyo_read_file_pattern(struct tomoyo_io_buffer *head); /* Read "path_group" entry in exception policy. */ bool tomoyo_read_path_group_policy(struct tomoyo_io_buffer *head); /* Read "number_group" entry in exception policy. */ bool tomoyo_read_number_group_policy(struct tomoyo_io_buffer *head); /* Read "allow_read" entry in exception policy. */ bool tomoyo_read_globally_readable_policy(struct tomoyo_io_buffer *head); /* Read "deny_rewrite" entry in exception policy. */ bool tomoyo_read_no_rewrite_policy(struct tomoyo_io_buffer *head); /* Tokenize a line. */ bool tomoyo_tokenize(char *buffer, char *w[], size_t size); /* Write domain policy violation warning message to console? */ bool tomoyo_verbose_mode(const struct tomoyo_domain_info *domain); /* Convert double path operation to operation name. */ const char *tomoyo_path22keyword(const u8 operation); /* Get the last component of the given domainname. */ const char *tomoyo_get_last_name(const struct tomoyo_domain_info *domain); /* Convert single path operation to operation name. */ const char *tomoyo_path2keyword(const u8 operation); /* Create "alias" entry in exception policy. */ int tomoyo_write_alias_policy(char *data, const bool is_delete); /* * Create "initialize_domain" and "no_initialize_domain" entry * in exception policy. */ int tomoyo_write_domain_initializer_policy(char *data, const bool is_not, const bool is_delete); /* Create "keep_domain" and "no_keep_domain" entry in exception policy. */ int tomoyo_write_domain_keeper_policy(char *data, const bool is_not, const bool is_delete); /* * Create "allow_read/write", "allow_execute", "allow_read", "allow_write", * "allow_create", "allow_unlink", "allow_mkdir", "allow_rmdir", * "allow_mkfifo", "allow_mksock", "allow_mkblock", "allow_mkchar", * "allow_truncate", "allow_symlink", "allow_rewrite", "allow_rename" and * "allow_link" entry in domain policy. */ int tomoyo_write_file_policy(char *data, struct tomoyo_domain_info *domain, const bool is_delete); /* Create "allow_read" entry in exception policy. */ int tomoyo_write_globally_readable_policy(char *data, const bool is_delete); /* Create "deny_rewrite" entry in exception policy. */ int tomoyo_write_no_rewrite_policy(char *data, const bool is_delete); /* Create "file_pattern" entry in exception policy. */ int tomoyo_write_pattern_policy(char *data, const bool is_delete); /* Create "path_group" entry in exception policy. */ int tomoyo_write_path_group_policy(char *data, const bool is_delete); /* Create "number_group" entry in exception policy. */ int tomoyo_write_number_group_policy(char *data, const bool is_delete); /* Find a domain by the given name. */ struct tomoyo_domain_info *tomoyo_find_domain(const char *domainname); /* Find or create a domain by the given name. */ struct tomoyo_domain_info *tomoyo_find_or_assign_new_domain(const char * domainname, const u8 profile); /* Allocate memory for "struct tomoyo_path_group". */ struct tomoyo_path_group *tomoyo_get_path_group(const char *group_name); struct tomoyo_number_group *tomoyo_get_number_group(const char *group_name); /* Check mode for specified functionality. */ unsigned int tomoyo_check_flags(const struct tomoyo_domain_info *domain, const u8 index); /* Fill in "struct tomoyo_path_info" members. */ void tomoyo_fill_path_info(struct tomoyo_path_info *ptr); /* Run policy loader when /sbin/init starts. */ void tomoyo_load_policy(const char *filename); void tomoyo_put_number_union(struct tomoyo_number_union *ptr); /* Convert binary string to ascii string. */ int tomoyo_encode(char *buffer, int buflen, const char *str); /* Returns realpath(3) of the given pathname but ignores chroot'ed root. */ int tomoyo_realpath_from_path2(struct path *path, char *newname, int newname_len); /* * Returns realpath(3) of the given pathname but ignores chroot'ed root. * These functions use kzalloc(), so the caller must call kfree() * if these functions didn't return NULL. */ char *tomoyo_realpath(const char *pathname); /* * Same with tomoyo_realpath() except that it doesn't follow the final symlink. */ char *tomoyo_realpath_nofollow(const char *pathname); /* Same with tomoyo_realpath() except that the pathname is already solved. */ char *tomoyo_realpath_from_path(struct path *path); /* Check memory quota. */ bool tomoyo_memory_ok(void *ptr); void *tomoyo_commit_ok(void *data, const unsigned int size); /* * Keep the given name on the RAM. * The RAM is shared, so NEVER try to modify or kfree() the returned name. */ const struct tomoyo_path_info *tomoyo_get_name(const char *name); /* Check for memory usage. */ int tomoyo_read_memory_counter(struct tomoyo_io_buffer *head); /* Set memory quota. */ int tomoyo_write_memory_quota(struct tomoyo_io_buffer *head); /* Initialize realpath related code. */ void __init tomoyo_realpath_init(void); int tomoyo_check_exec_perm(struct tomoyo_domain_info *domain, 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_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); /* Drop refcount on tomoyo_name_union. */ void tomoyo_put_name_union(struct tomoyo_name_union *ptr); /* Run garbage collector. */ void tomoyo_run_gc(void); void tomoyo_memory_free(void *ptr); /********** 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_path_group_list; extern struct list_head tomoyo_number_group_list; extern struct list_head tomoyo_domain_initializer_list; extern struct list_head tomoyo_domain_keeper_list; extern struct list_head tomoyo_alias_list; extern struct list_head tomoyo_globally_readable_list; extern struct list_head tomoyo_pattern_list; extern struct list_head tomoyo_no_rewrite_list; extern struct list_head tomoyo_policy_manager_list; 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; /********** Inlined functions. **********/ static inline int tomoyo_read_lock(void) { return srcu_read_lock(&tomoyo_ss); } static inline void tomoyo_read_unlock(int idx) { srcu_read_unlock(&tomoyo_ss, idx); } /* strcmp() for "struct tomoyo_path_info" structure. */ 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_is_valid - Check whether the character is a valid char. * * @c: The character to check. * * Returns true if @c is a valid character, false otherwise. */ static inline bool tomoyo_is_valid(const unsigned char c) { return c > ' ' && c < 127; } /** * tomoyo_is_invalid - Check whether the character is an invalid char. * * @c: The character to check. * * Returns true if @c is an invalid character, false otherwise. */ static inline bool tomoyo_is_invalid(const unsigned char c) { return c && (c <= ' ' || c >= 127); } static inline void tomoyo_put_name(const struct tomoyo_path_info *name) { if (name) { struct tomoyo_name_entry *ptr = container_of(name, struct tomoyo_name_entry, entry); atomic_dec(&ptr->users); } } static inline void tomoyo_put_path_group(struct tomoyo_path_group *group) { if (group) atomic_dec(&group->users); } static inline void tomoyo_put_number_group(struct tomoyo_number_group *group) { if (group) atomic_dec(&group->users); } static inline struct tomoyo_domain_info *tomoyo_domain(void) { return current_cred()->security; } static inline struct tomoyo_domain_info *tomoyo_real_domain(struct task_struct *task) { return task_cred_xxx(task, security); } static inline bool tomoyo_is_same_acl_head(const struct tomoyo_acl_info *p1, const struct tomoyo_acl_info *p2) { return p1->type == p2->type; } static inline bool tomoyo_is_same_name_union (const struct tomoyo_name_union *p1, const struct tomoyo_name_union *p2) { return p1->filename == p2->filename && p1->group == p2->group && p1->is_group == p2->is_group; } static inline bool tomoyo_is_same_number_union (const struct tomoyo_number_union *p1, const struct tomoyo_number_union *p2) { return p1->values[0] == p2->values[0] && p1->values[1] == p2->values[1] && p1->group == p2->group && p1->min_type == p2->min_type && p1->max_type == p2->max_type && p1->is_group == p2->is_group; } static inline bool tomoyo_is_same_path_acl(const struct tomoyo_path_acl *p1, const struct tomoyo_path_acl *p2) { return tomoyo_is_same_acl_head(&p1->head, &p2->head) && tomoyo_is_same_name_union(&p1->name, &p2->name); } static inline bool tomoyo_is_same_path2_acl(const struct tomoyo_path2_acl *p1, const struct tomoyo_path2_acl *p2) { return tomoyo_is_same_acl_head(&p1->head, &p2->head) && tomoyo_is_same_name_union(&p1->name1, &p2->name1) && tomoyo_is_same_name_union(&p1->name2, &p2->name2); } static inline bool tomoyo_is_same_domain_initializer_entry (const struct tomoyo_domain_initializer_entry *p1, const struct tomoyo_domain_initializer_entry *p2) { return p1->is_not == p2->is_not && p1->is_last_name == p2->is_last_name && p1->domainname == p2->domainname && p1->program == p2->program; } static inline bool tomoyo_is_same_domain_keeper_entry (const struct tomoyo_domain_keeper_entry *p1, const struct tomoyo_domain_keeper_entry *p2) { return p1->is_not == p2->is_not && p1->is_last_name == p2->is_last_name && p1->domainname == p2->domainname && p1->program == p2->program; } static inline bool tomoyo_is_same_alias_entry (const struct tomoyo_alias_entry *p1, const struct tomoyo_alias_entry *p2) { return p1->original_name == p2->original_name && p1->aliased_name == p2->aliased_name; } /** * list_for_each_cookie - iterate over a list with cookie. * @pos: the &struct list_head to use as a loop cursor. * @cookie: the &struct list_head to use as a cookie. * @head: the head for your list. * * Same with list_for_each_rcu() except that this primitive uses @cookie * so that we can continue iteration. * @cookie must be NULL when iteration starts, and @cookie will become * NULL when iteration finishes. */ #define list_for_each_cookie(pos, cookie, head) \ for (({ if (!cookie) \ cookie = head; }), \ pos = rcu_dereference((cookie)->next); \ prefetch(pos->next), pos != (head) || ((cookie) = NULL); \ (cookie) = pos, pos = rcu_dereference(pos->next)) #endif /* !defined(_SECURITY_TOMOYO_COMMON_H) */