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TOMOYO: Merge path_group and number_group.

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Use common code for "path_group" and "number_group".

Signed-off-by: Tetsuo Handa <penguin-kernel@I-love.SAKURA.ne.jp>
Signed-off-by: James Morris <jmorris@namei.org>
This commit is contained in:
Tetsuo Handa 2010-06-17 16:55:58 +09:00 committed by James Morris
parent 31845e8c6d
commit 7c2ea22e3c
9 changed files with 199 additions and 282 deletions
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2
security/tomoyo/Makefile
View File

@ -1 +1 @@
obj-y = common.o domain.o file.o gc.o load_policy.o memory.o mount.o number_group.o path_group.o realpath.o securityfs_if.o tomoyo.o util.o
obj-y = common.o domain.o file.o gc.o group.o load_policy.o memory.o mount.o realpath.o securityfs_if.o tomoyo.o util.o

4
security/tomoyo/common.c
View File

@ -1186,9 +1186,9 @@ static int tomoyo_write_exception_policy(struct tomoyo_io_buffer *head)
if (tomoyo_str_starts(&data, TOMOYO_KEYWORD_DENY_REWRITE))
return tomoyo_write_no_rewrite_policy(data, is_delete);
if (tomoyo_str_starts(&data, TOMOYO_KEYWORD_PATH_GROUP))
return tomoyo_write_path_group_policy(data, is_delete);
return tomoyo_write_group(data, is_delete, TOMOYO_PATH_GROUP);
if (tomoyo_str_starts(&data, TOMOYO_KEYWORD_NUMBER_GROUP))
return tomoyo_write_number_group_policy(data, is_delete);
return tomoyo_write_group(data, is_delete, TOMOYO_NUMBER_GROUP);
return -EINVAL;
}

13
security/tomoyo/common.h
View File

@ -838,12 +838,10 @@ int tomoyo_write_mount_policy(char *data, struct tomoyo_domain_info *domain,
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 "path_group"/"number_group" entry in exception policy. */
int tomoyo_write_group(char *data, const bool is_delete, const u8 type);
int tomoyo_supervisor(struct tomoyo_request_info *r, const char *fmt, ...)
__attribute__ ((format(printf, 2, 3)));
/* 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. */
@ -851,9 +849,10 @@ struct tomoyo_domain_info *tomoyo_find_or_assign_new_domain(const char *
domainname,
const u8 profile);
struct tomoyo_profile *tomoyo_profile(const u8 profile);
/* Allocate memory for "struct tomoyo_path_group". */
struct tomoyo_group *tomoyo_get_path_group(const char *group_name);
struct tomoyo_group *tomoyo_get_number_group(const char *group_name);
/*
* Allocate memory for "struct tomoyo_path_group"/"struct tomoyo_number_group".
*/
struct tomoyo_group *tomoyo_get_group(const char *group_name, const u8 type);
/* Check mode for specified functionality. */
unsigned int tomoyo_check_flags(const struct tomoyo_domain_info *domain,

36
security/tomoyo/gc.c
View File

@ -266,33 +266,25 @@ static void tomoyo_collect_entry(void)
goto unlock;
}
}
{
for (i = 0; i < TOMOYO_MAX_GROUP; i++) {
struct list_head *list = &tomoyo_group_list[i];
int id;
struct tomoyo_group *group;
list_for_each_entry_rcu(group,
&tomoyo_group_list[TOMOYO_PATH_GROUP],
list) {
tomoyo_collect_member(&group->member_list,
TOMOYO_ID_PATH_GROUP);
if (!list_empty(&group->member_list) ||
atomic_read(&group->users))
continue;
if (!tomoyo_add_to_gc(TOMOYO_ID_GROUP,
&group->list))
goto unlock;
switch (i) {
case 0:
id = TOMOYO_ID_PATH_GROUP;
break;
default:
id = TOMOYO_ID_NUMBER_GROUP;
break;
}
}
{
struct tomoyo_group *group;
list_for_each_entry_rcu(group,
&tomoyo_group_list[TOMOYO_NUMBER_GROUP],
list) {
tomoyo_collect_member(&group->member_list,
TOMOYO_ID_NUMBER_GROUP);
list_for_each_entry(group, list, list) {
if (!tomoyo_collect_member(&group->member_list, id))
goto unlock;
if (!list_empty(&group->member_list) ||
atomic_read(&group->users))
continue;
if (!tomoyo_add_to_gc(TOMOYO_ID_GROUP,
&group->list))
if (!tomoyo_add_to_gc(TOMOYO_ID_GROUP, &group->list))
goto unlock;
}
}

130
security/tomoyo/group.c Normal file
View File

@ -0,0 +1,130 @@
/*
* security/tomoyo/group.c
*
* Copyright (C) 2005-2010 NTT DATA CORPORATION
*/
#include <linux/slab.h>
#include "common.h"
static bool tomoyo_same_path_group(const struct tomoyo_acl_head *a,
const struct tomoyo_acl_head *b)
{
return container_of(a, struct tomoyo_path_group, head)->member_name ==
container_of(b, struct tomoyo_path_group, head)->member_name;
}
static bool tomoyo_same_number_group(const struct tomoyo_acl_head *a,
const struct tomoyo_acl_head *b)
{
return !memcmp(&container_of(a, struct tomoyo_number_group, head)
->number,
&container_of(b, struct tomoyo_number_group, head)
->number,
sizeof(container_of(a, struct tomoyo_number_group, head)
->number));
}
/**
* tomoyo_write_group - Write "struct tomoyo_path_group"/"struct tomoyo_number_group" list.
*
* @data: String to parse.
* @is_delete: True if it is a delete request.
* @type: Type of this group.
*
* Returns 0 on success, negative value otherwise.
*/
int tomoyo_write_group(char *data, const bool is_delete, const u8 type)
{
struct tomoyo_group *group;
struct list_head *member;
char *w[2];
int error = -EINVAL;
if (!tomoyo_tokenize(data, w, sizeof(w)) || !w[1][0])
return -EINVAL;
group = tomoyo_get_group(w[0], type);
if (!group)
return -ENOMEM;
member = &group->member_list;
if (type == TOMOYO_PATH_GROUP) {
struct tomoyo_path_group e = { };
e.member_name = tomoyo_get_name(w[1]);
if (!e.member_name) {
error = -ENOMEM;
goto out;
}
error = tomoyo_update_policy(&e.head, sizeof(e), is_delete,
member, tomoyo_same_path_group);
tomoyo_put_name(e.member_name);
} else if (type == TOMOYO_NUMBER_GROUP) {
struct tomoyo_number_group e = { };
if (w[1][0] == '@'
|| !tomoyo_parse_number_union(w[1], &e.number)
|| e.number.values[0] > e.number.values[1])
goto out;
error = tomoyo_update_policy(&e.head, sizeof(e), is_delete,
member, tomoyo_same_number_group);
/*
* tomoyo_put_number_union() is not needed because
* w[1][0] != '@'.
*/
}
out:
tomoyo_put_group(group);
return error;
}
/**
* tomoyo_path_matches_group - Check whether the given pathname matches members of the given pathname group.
*
* @pathname: The name of pathname.
* @group: Pointer to "struct tomoyo_path_group".
*
* Returns true if @pathname matches pathnames in @group, false otherwise.
*
* Caller holds tomoyo_read_lock().
*/
bool tomoyo_path_matches_group(const struct tomoyo_path_info *pathname,
const struct tomoyo_group *group)
{
struct tomoyo_path_group *member;
bool matched = false;
list_for_each_entry_rcu(member, &group->member_list, head.list) {
if (member->head.is_deleted)
continue;
if (!tomoyo_path_matches_pattern(pathname, member->member_name))
continue;
matched = true;
break;
}
return matched;
}
/**
* tomoyo_number_matches_group - Check whether the given number matches members of the given number group.
*
* @min: Min number.
* @max: Max number.
* @group: Pointer to "struct tomoyo_number_group".
*
* Returns true if @min and @max partially overlaps @group, false otherwise.
*
* Caller holds tomoyo_read_lock().
*/
bool tomoyo_number_matches_group(const unsigned long min,
const unsigned long max,
const struct tomoyo_group *group)
{
struct tomoyo_number_group *member;
bool matched = false;
list_for_each_entry_rcu(member, &group->member_list, head.list) {
if (member->head.is_deleted)
continue;
if (min > member->number.values[1] ||
max < member->number.values[0])
continue;
matched = true;
break;
}
return matched;
}

44
security/tomoyo/memory.c
View File

@ -89,6 +89,50 @@ void tomoyo_memory_free(void *ptr)
kfree(ptr);
}
/**
* tomoyo_get_group - Allocate memory for "struct tomoyo_path_group"/"struct tomoyo_number_group".
*
* @group_name: The name of address group.
* @idx: Index number.
*
* Returns pointer to "struct tomoyo_group" on success, NULL otherwise.
*/
struct tomoyo_group *tomoyo_get_group(const char *group_name, const u8 idx)
{
struct tomoyo_group e = { };
struct tomoyo_group *group = NULL;
bool found = false;
if (!tomoyo_correct_word(group_name) || idx >= TOMOYO_MAX_GROUP)
return NULL;
e.group_name = tomoyo_get_name(group_name);
if (!e.group_name)
return NULL;
if (mutex_lock_interruptible(&tomoyo_policy_lock))
goto out;
list_for_each_entry(group, &tomoyo_group_list[idx], list) {
if (e.group_name != group->group_name)
continue;
atomic_inc(&group->users);
found = true;
break;
}
if (!found) {
struct tomoyo_group *entry = tomoyo_commit_ok(&e, sizeof(e));
if (entry) {
INIT_LIST_HEAD(&entry->member_list);
atomic_set(&entry->users, 1);
list_add_tail_rcu(&entry->list,
&tomoyo_group_list[idx]);
group = entry;
found = true;
}
}
mutex_unlock(&tomoyo_policy_lock);
out:
tomoyo_put_name(e.group_name);
return found ? group : NULL;
}
/*
* tomoyo_name_list is used for holding string data used by TOMOYO.
* Since same string data is likely used for multiple times (e.g.

126
security/tomoyo/number_group.c
View File

@ -1,126 +0,0 @@
/*
* security/tomoyo/number_group.c
*
* Copyright (C) 2005-2009 NTT DATA CORPORATION
*/
#include <linux/slab.h>
#include "common.h"
/**
* tomoyo_get_group - Allocate memory for "struct tomoyo_number_group".
*
* @group_name: The name of number group.
*
* Returns pointer to "struct tomoyo_number_group" on success,
* NULL otherwise.
*/
struct tomoyo_group *tomoyo_get_number_group(const char *group_name)
{
struct tomoyo_group *entry = NULL;
struct tomoyo_group *group = NULL;
const struct tomoyo_path_info *saved_group_name;
int error = -ENOMEM;
if (!tomoyo_correct_word(group_name))
return NULL;
saved_group_name = tomoyo_get_name(group_name);
if (!saved_group_name)
return NULL;
entry = kzalloc(sizeof(*entry), GFP_NOFS);
if (mutex_lock_interruptible(&tomoyo_policy_lock))
goto out;
list_for_each_entry_rcu(group, &tomoyo_group_list[TOMOYO_NUMBER_GROUP],
list) {
if (saved_group_name != group->group_name)
continue;
atomic_inc(&group->users);
error = 0;
break;
}
if (error && tomoyo_memory_ok(entry)) {
INIT_LIST_HEAD(&entry->member_list);
entry->group_name = saved_group_name;
saved_group_name = NULL;
atomic_set(&entry->users, 1);
list_add_tail_rcu(&entry->list,
&tomoyo_group_list[TOMOYO_NUMBER_GROUP]);
group = entry;
entry = NULL;
error = 0;
}
mutex_unlock(&tomoyo_policy_lock);
out:
tomoyo_put_name(saved_group_name);
kfree(entry);
return !error ? group : NULL;
}
static bool tomoyo_same_number_group(const struct tomoyo_acl_head *a,
const struct tomoyo_acl_head *b)
{
return !memcmp(&container_of(a, struct tomoyo_number_group,
head)->number,
&container_of(b, struct tomoyo_number_group,
head)->number,
sizeof(container_of(a,
struct tomoyo_number_group,
head)->number));
}
/**
* tomoyo_write_number_group_policy - Write "struct tomoyo_number_group" list.
*
* @data: String to parse.
* @is_delete: True if it is a delete request.
*
* Returns 0 on success, nagative value otherwise.
*/
int tomoyo_write_number_group_policy(char *data, const bool is_delete)
{
struct tomoyo_group *group;
struct tomoyo_number_group e = { };
int error;
char *w[2];
if (!tomoyo_tokenize(data, w, sizeof(w)))
return -EINVAL;
if (w[1][0] == '@' || !tomoyo_parse_number_union(w[1], &e.number) ||
e.number.values[0] > e.number.values[1])
return -EINVAL;
group = tomoyo_get_number_group(w[0]);
if (!group)
return -ENOMEM;
error = tomoyo_update_policy(&e.head, sizeof(e), is_delete,
&group->member_list,
tomoyo_same_number_group);
tomoyo_put_group(group);
return error;
}
/**
* tomoyo_number_matches_group - Check whether the given number matches members of the given number group.
*
* @min: Min number.
* @max: Max number.
* @group: Pointer to "struct tomoyo_number_group".
*
* Returns true if @min and @max partially overlaps @group, false otherwise.
*
* Caller holds tomoyo_read_lock().
*/
bool tomoyo_number_matches_group(const unsigned long min,
const unsigned long max,
const struct tomoyo_group *group)
{
struct tomoyo_number_group *member;
bool matched = false;
list_for_each_entry_rcu(member, &group->member_list, head.list) {
if (member->head.is_deleted)
continue;
if (min > member->number.values[1] ||
max < member->number.values[0])
continue;
matched = true;
break;
}
return matched;
}

122
security/tomoyo/path_group.c
View File

@ -1,122 +0,0 @@
/*
* security/tomoyo/path_group.c
*
* Copyright (C) 2005-2009 NTT DATA CORPORATION
*/
#include <linux/slab.h>
#include "common.h"
/**
* tomoyo_get_group - Allocate memory for "struct tomoyo_path_group".
*
* @group_name: The name of pathname group.
*
* Returns pointer to "struct tomoyo_path_group" on success, NULL otherwise.
*/
struct tomoyo_group *tomoyo_get_path_group(const char *group_name)
{
struct tomoyo_group *entry = NULL;
struct tomoyo_group *group = NULL;
const struct tomoyo_path_info *saved_group_name;
int error = -ENOMEM;
if (!tomoyo_correct_word(group_name))
return NULL;
saved_group_name = tomoyo_get_name(group_name);
if (!saved_group_name)
return NULL;
entry = kzalloc(sizeof(*entry), GFP_NOFS);
if (mutex_lock_interruptible(&tomoyo_policy_lock))
goto out;
list_for_each_entry_rcu(group, &tomoyo_group_list[TOMOYO_PATH_GROUP],
list) {
if (saved_group_name != group->group_name)
continue;
atomic_inc(&group->users);
error = 0;
break;
}
if (error && tomoyo_memory_ok(entry)) {
INIT_LIST_HEAD(&entry->member_list);
entry->group_name = saved_group_name;
saved_group_name = NULL;
atomic_set(&entry->users, 1);
list_add_tail_rcu(&entry->list,
&tomoyo_group_list[TOMOYO_PATH_GROUP]);
group = entry;
entry = NULL;
error = 0;
}
mutex_unlock(&tomoyo_policy_lock);
out:
tomoyo_put_name(saved_group_name);
kfree(entry);
return !error ? group : NULL;
}
static bool tomoyo_same_path_group(const struct tomoyo_acl_head *a,
const struct tomoyo_acl_head *b)
{
return container_of(a, struct tomoyo_path_group, head)
->member_name ==
container_of(b, struct tomoyo_path_group, head)
->member_name;
}
/**
* tomoyo_write_path_group_policy - Write "struct tomoyo_path_group" list.
*
* @data: String to parse.
* @is_delete: True if it is a delete request.
*
* Returns 0 on success, nagative value otherwise.
*/
int tomoyo_write_path_group_policy(char *data, const bool is_delete)
{
struct tomoyo_group *group;
struct tomoyo_path_group e = { };
int error = is_delete ? -ENOENT : -ENOMEM;
char *w[2];
if (!tomoyo_tokenize(data, w, sizeof(w)) || !w[1][0])
return -EINVAL;
group = tomoyo_get_path_group(w[0]);
if (!group)
return -ENOMEM;
e.member_name = tomoyo_get_name(w[1]);
if (!e.member_name)
goto out;
error = tomoyo_update_policy(&e.head, sizeof(e), is_delete,
&group->member_list,
tomoyo_same_path_group);
out:
tomoyo_put_name(e.member_name);
tomoyo_put_group(group);
return error;
}
/**
* tomoyo_path_matches_group - Check whether the given pathname matches members of the given pathname group.
*
* @pathname: The name of pathname.
* @group: Pointer to "struct tomoyo_path_group".
*
* Returns true if @pathname matches pathnames in @group, false otherwise.
*
* Caller holds tomoyo_read_lock().
*/
bool tomoyo_path_matches_group(const struct tomoyo_path_info *pathname,
const struct tomoyo_group *group)
{
struct tomoyo_path_group *member;
bool matched = false;
list_for_each_entry_rcu(member, &group->member_list, head.list) {
if (member->head.is_deleted)
continue;
if (!tomoyo_path_matches_pattern(pathname,
member->member_name))
continue;
matched = true;
break;
}
return matched;
}

4
security/tomoyo/util.c
View File

@ -92,7 +92,7 @@ bool tomoyo_parse_name_union(const char *filename,
if (!tomoyo_correct_word(filename))
return false;
if (filename[0] == '@') {
ptr->group = tomoyo_get_path_group(filename + 1);
ptr->group = tomoyo_get_group(filename + 1, TOMOYO_PATH_GROUP);
ptr->is_group = true;
return ptr->group != NULL;
}
@ -117,7 +117,7 @@ bool tomoyo_parse_number_union(char *data, struct tomoyo_number_union *num)
if (data[0] == '@') {
if (!tomoyo_correct_word(data))
return false;
num->group = tomoyo_get_number_group(data + 1);
num->group = tomoyo_get_group(data + 1, TOMOYO_NUMBER_GROUP);
num->is_group = true;
return num->group != NULL;
}