TOMOYO: Merge headers. (76bb0895) · Commits · e / devices / android_kernel_fairphone_FP3

security/tomoyo/common.c

+0 −23

Original line number	Diff line number	Diff line
		@@ -13,8 +13,6 @@
		#include <linux/security.h>
		#include <linux/hardirq.h>
		#include "common.h"
		#include "realpath.h"
		#include "tomoyo.h"

		/* Lock for protecting policy. */
		DEFINE_MUTEX(tomoyo_policy_lock);
		@@ -1039,27 +1037,6 @@ static int tomoyo_read_profile(struct tomoyo_io_buffer *head)
		return 0;
		}

		/*
		* 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. */
		};

		/*
		* tomoyo_policy_manager_list is used for holding list of domainnames or
		* programs which are permitted to modify configuration via

security/tomoyo/common.h

+351 −60

Original line number	Diff line number	Diff line
		/*
		* security/tomoyo/common.h
		*
		* Common functions for TOMOYO.
		*
		* Copyright (C) 2005-2009 NTT DATA CORPORATION
		*
		* Version: 2.2.0 2009/04/01
		* Header file for TOMOYO.
		*
		* Copyright (C) 2005-2010 NTT DATA CORPORATION
		*/

		#ifndef _SECURITY_TOMOYO_COMMON_H
		@@ -22,9 +19,110 @@
		#include <linux/namei.h>
		#include <linux/mount.h>
		#include <linux/list.h>
		#include <linux/cred.h>
		struct linux_binprm;

		/******** Constants definitions. ********/

		/*
		* TOMOYO uses this hash only when appending a string into the string
		* table. Frequency of appending strings is very low. So we don't need
		* large (e.g. 64k) hash size. 256 will be sufficient.
		*/
		#define TOMOYO_HASH_BITS 8
		#define TOMOYO_MAX_HASH (1u<<TOMOYO_HASH_BITS)

		/*
		* This is the max length of a token.
		*
		* A token consists of only ASCII printable characters.
		* Non printable characters in a token is represented in \ooo style
		* octal string. Thus, \ itself is represented as \\.
		*/
		#define TOMOYO_MAX_PATHNAME_LEN 4000

		/* Profile number is an integer between 0 and 255. */
		#define TOMOYO_MAX_PROFILES 256

		/* Keywords for ACLs. */
		#define TOMOYO_KEYWORD_ALIAS "alias "
		#define TOMOYO_KEYWORD_ALLOW_READ "allow_read "
		#define TOMOYO_KEYWORD_DELETE "delete "
		#define TOMOYO_KEYWORD_DENY_REWRITE "deny_rewrite "
		#define TOMOYO_KEYWORD_FILE_PATTERN "file_pattern "
		#define TOMOYO_KEYWORD_INITIALIZE_DOMAIN "initialize_domain "
		#define TOMOYO_KEYWORD_KEEP_DOMAIN "keep_domain "
		#define TOMOYO_KEYWORD_NO_INITIALIZE_DOMAIN "no_initialize_domain "
		#define TOMOYO_KEYWORD_NO_KEEP_DOMAIN "no_keep_domain "
		#define TOMOYO_KEYWORD_SELECT "select "
		#define TOMOYO_KEYWORD_USE_PROFILE "use_profile "
		#define TOMOYO_KEYWORD_IGNORE_GLOBAL_ALLOW_READ "ignore_global_allow_read"
		/* A domain definition starts with <kernel>. */
		#define TOMOYO_ROOT_NAME "<kernel>"
		#define TOMOYO_ROOT_NAME_LEN (sizeof(TOMOYO_ROOT_NAME) - 1)

		/* Index numbers for Access Controls. */
		#define TOMOYO_MAC_FOR_FILE 0 /* domain_policy.conf */
		#define TOMOYO_MAX_ACCEPT_ENTRY 1
		#define TOMOYO_VERBOSE 2
		#define TOMOYO_MAX_CONTROL_INDEX 3

		/* Index numbers for Access Controls. */

		struct dentry;
		struct vfsmount;
		#define TOMOYO_TYPE_SINGLE_PATH_ACL 0
		#define TOMOYO_TYPE_DOUBLE_PATH_ACL 1

		/* 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.
		*/

		#define TOMOYO_TYPE_READ_WRITE_ACL 0
		#define TOMOYO_TYPE_EXECUTE_ACL 1
		#define TOMOYO_TYPE_READ_ACL 2
		#define TOMOYO_TYPE_WRITE_ACL 3
		#define TOMOYO_TYPE_CREATE_ACL 4
		#define TOMOYO_TYPE_UNLINK_ACL 5
		#define TOMOYO_TYPE_MKDIR_ACL 6
		#define TOMOYO_TYPE_RMDIR_ACL 7
		#define TOMOYO_TYPE_MKFIFO_ACL 8
		#define TOMOYO_TYPE_MKSOCK_ACL 9
		#define TOMOYO_TYPE_MKBLOCK_ACL 10
		#define TOMOYO_TYPE_MKCHAR_ACL 11
		#define TOMOYO_TYPE_TRUNCATE_ACL 12
		#define TOMOYO_TYPE_SYMLINK_ACL 13
		#define TOMOYO_TYPE_REWRITE_ACL 14
		#define TOMOYO_TYPE_IOCTL_ACL 15
		#define TOMOYO_TYPE_CHMOD_ACL 16
		#define TOMOYO_TYPE_CHOWN_ACL 17
		#define TOMOYO_TYPE_CHGRP_ACL 18
		#define TOMOYO_TYPE_CHROOT_ACL 19
		#define TOMOYO_TYPE_MOUNT_ACL 20
		#define TOMOYO_TYPE_UMOUNT_ACL 21
		#define TOMOYO_MAX_SINGLE_PATH_OPERATION 22

		#define TOMOYO_TYPE_LINK_ACL 0
		#define TOMOYO_TYPE_RENAME_ACL 1
		#define TOMOYO_TYPE_PIVOT_ROOT_ACL 2
		#define TOMOYO_MAX_DOUBLE_PATH_OPERATION 3

		#define TOMOYO_DOMAINPOLICY 0
		#define TOMOYO_EXCEPTIONPOLICY 1
		#define TOMOYO_DOMAIN_STATUS 2
		#define TOMOYO_PROCESS_STATUS 3
		#define TOMOYO_MEMINFO 4
		#define TOMOYO_SELFDOMAIN 5
		#define TOMOYO_VERSION 6
		#define TOMOYO_PROFILE 7
		#define TOMOYO_MANAGER 8

		/******** Structure definitions. ********/

		/*
		* tomoyo_page_buffer is a structure which is used for holding a pathname
		@@ -66,13 +164,14 @@ struct tomoyo_path_info {
		};

		/*
		* This is the max length of a token.
		*
		* A token consists of only ASCII printable characters.
		* Non printable characters in a token is represented in \ooo style
		* octal string. Thus, \ itself is represented as \\.
		* tomoyo_name_entry is a structure which is used for linking
		* "struct tomoyo_path_info" into tomoyo_name_list .
		*/
		#define TOMOYO_MAX_PATHNAME_LEN 4000
		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
		@@ -155,9 +254,6 @@ struct tomoyo_domain_info {
		bool transition_failed; /* Domain transition failed flag. */
		};

		/* Profile number is an integer between 0 and 255. */
		#define TOMOYO_MAX_PROFILES 256

		/*
		* tomoyo_single_path_acl_record is a structure which is used for holding an
		* entry with one pathname operation (e.g. open(), mkdir()).
		@@ -204,29 +300,6 @@ struct tomoyo_double_path_acl_record {
		const struct tomoyo_path_info *filename2;
		};

		/* Keywords for ACLs. */
		#define TOMOYO_KEYWORD_ALIAS "alias "
		#define TOMOYO_KEYWORD_ALLOW_READ "allow_read "
		#define TOMOYO_KEYWORD_DELETE "delete "
		#define TOMOYO_KEYWORD_DENY_REWRITE "deny_rewrite "
		#define TOMOYO_KEYWORD_FILE_PATTERN "file_pattern "
		#define TOMOYO_KEYWORD_INITIALIZE_DOMAIN "initialize_domain "
		#define TOMOYO_KEYWORD_KEEP_DOMAIN "keep_domain "
		#define TOMOYO_KEYWORD_NO_INITIALIZE_DOMAIN "no_initialize_domain "
		#define TOMOYO_KEYWORD_NO_KEEP_DOMAIN "no_keep_domain "
		#define TOMOYO_KEYWORD_SELECT "select "
		#define TOMOYO_KEYWORD_USE_PROFILE "use_profile "
		#define TOMOYO_KEYWORD_IGNORE_GLOBAL_ALLOW_READ "ignore_global_allow_read"
		/* A domain definition starts with <kernel>. */
		#define TOMOYO_ROOT_NAME "<kernel>"
		#define TOMOYO_ROOT_NAME_LEN (sizeof(TOMOYO_ROOT_NAME) - 1)

		/* Index numbers for Access Controls. */
		#define TOMOYO_MAC_FOR_FILE 0 /* domain_policy.conf */
		#define TOMOYO_MAX_ACCEPT_ENTRY 1
		#define TOMOYO_VERBOSE 2
		#define TOMOYO_MAX_CONTROL_INDEX 3

		/*
		* tomoyo_io_buffer is a structure which is used for reading and modifying
		* configuration via /sys/kernel/security/tomoyo/ interface.
		@@ -285,6 +358,149 @@ struct tomoyo_io_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 domain has too many ACL entries to hold. */
		bool tomoyo_domain_quota_is_ok(struct tomoyo_domain_info * const domain);
		/* Transactional sprintf() for policy dump. */
		@@ -367,6 +583,85 @@ void tomoyo_fill_path_info(struct tomoyo_path_info *ptr);
		/* Run policy loader when /sbin/init starts. */
		void tomoyo_load_policy(const char *filename);

		/* 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);

		/*
		* 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_check_1path_perm(struct tomoyo_domain_info *domain,
		const u8 operation, struct path *path);
		int tomoyo_check_2path_perm(struct tomoyo_domain_info *domain,
		const u8 operation, struct path *path1,
		struct path *path2);
		int tomoyo_check_rewrite_permission(struct tomoyo_domain_info *domain,
		struct file *filp);
		int tomoyo_find_next_domain(struct linux_binprm *bprm);

		/******** 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;

		/* 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)
		@@ -398,17 +693,25 @@ static inline bool tomoyo_is_invalid(const unsigned char c)
		return c && (c <= ' ' \|\| c >= 127);
		}

		/* The list for "struct tomoyo_domain_info". */
		extern struct list_head tomoyo_domain_list;

		/* Lock for protecting policy. */
		extern struct mutex tomoyo_policy_lock;
		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);
		}
		}

		/* Has /sbin/init started? */
		extern bool tomoyo_policy_loaded;
		static inline struct tomoyo_domain_info *tomoyo_domain(void)
		{
		return current_cred()->security;
		}

		/* The kernel's domain. */
		extern struct tomoyo_domain_info tomoyo_kernel_domain;
		static inline struct tomoyo_domain_info *tomoyo_real_domain(struct task_struct
		*task)
		{
		return task_cred_xxx(task, security);
		}

		/**
		* list_for_each_cookie - iterate over a list with cookie.
		@@ -428,16 +731,4 @@ extern struct tomoyo_domain_info tomoyo_kernel_domain;
		prefetch(pos->next), pos != (head) \|\| ((cookie) = NULL); \
		(cookie) = pos, pos = rcu_dereference(pos->next))

		extern struct srcu_struct tomoyo_ss;

		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);
		}

		#endif /* !defined(_SECURITY_TOMOYO_COMMON_H) */

security/tomoyo/domain.c

+0 −72

Original line number	Diff line number	Diff line
		@@ -10,8 +10,6 @@
		*/

		#include "common.h"
		#include "tomoyo.h"
		#include "realpath.h"
		#include <linux/binfmts.h>

		/* Variables definitions.*/
		@@ -59,76 +57,6 @@ struct tomoyo_domain_info tomoyo_kernel_domain;
		*/
		LIST_HEAD(tomoyo_domain_list);

		/*
		* 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_get_last_name - Get last component of a domainname.
		*

security/tomoyo/file.c

+0 −52

Original line number	Diff line number	Diff line
		@@ -10,58 +10,6 @@
		*/

		#include "common.h"
		#include "tomoyo.h"
		#include "realpath.h"

		/*
		* 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;
		};

		/* Keyword array for single path operations. */
		static const char *tomoyo_sp_keyword[TOMOYO_MAX_SINGLE_PATH_OPERATION] = {

security/tomoyo/realpath.c

+0 −10

Original line number	Diff line number	Diff line
		@@ -15,9 +15,7 @@
		#include <linux/fs_struct.h>
		#include <linux/hash.h>
		#include <linux/magic.h>

		#include "common.h"
		#include "realpath.h"

		/**
		* tomoyo_encode: Convert binary string to ascii string.
		@@ -245,14 +243,6 @@ static unsigned int tomoyo_allocated_memory_for_savename;
		/* Quota for holding string data in bytes. */
		static unsigned int tomoyo_quota_for_savename;

		/*
		* 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_name_list is used for holding string data used by TOMOYO.
		* Since same string data is likely used for multiple times (e.g.