TOMOYO: Merge path_group and number_group.
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>
diff --git a/security/tomoyo/Makefile b/security/tomoyo/Makefile
index 3aa6f07..91640e9 100644
--- a/security/tomoyo/Makefile
+++ b/security/tomoyo/Makefile
@@ -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
diff --git a/security/tomoyo/common.c b/security/tomoyo/common.c
index 044115d..183fe65 100644
--- a/security/tomoyo/common.c
+++ b/security/tomoyo/common.c
@@ -1186,9 +1186,9 @@
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;
}
diff --git a/security/tomoyo/common.h b/security/tomoyo/common.h
index 21eb1e7..ec3ed48 100644
--- a/security/tomoyo/common.h
+++ b/security/tomoyo/common.h
@@ -838,12 +838,10 @@
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 @@
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,
diff --git a/security/tomoyo/gc.c b/security/tomoyo/gc.c
index 414e18b..cf62a4e 100644
--- a/security/tomoyo/gc.c
+++ b/security/tomoyo/gc.c
@@ -266,33 +266,25 @@
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;
}
}
diff --git a/security/tomoyo/group.c b/security/tomoyo/group.c
new file mode 100644
index 0000000..3f0a2ab
--- /dev/null
+++ b/security/tomoyo/group.c
@@ -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;
+}
diff --git a/security/tomoyo/memory.c b/security/tomoyo/memory.c
index 249835a..a1d75df 100644
--- a/security/tomoyo/memory.c
+++ b/security/tomoyo/memory.c
@@ -89,6 +89,50 @@
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.
diff --git a/security/tomoyo/number_group.c b/security/tomoyo/number_group.c
deleted file mode 100644
index 5e75f53..0000000
--- a/security/tomoyo/number_group.c
+++ /dev/null
@@ -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;
-}
diff --git a/security/tomoyo/path_group.c b/security/tomoyo/path_group.c
deleted file mode 100644
index 2f9f924..0000000
--- a/security/tomoyo/path_group.c
+++ /dev/null
@@ -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;
-}
diff --git a/security/tomoyo/util.c b/security/tomoyo/util.c
index 945eeef..20abba2 100644
--- a/security/tomoyo/util.c
+++ b/security/tomoyo/util.c
@@ -92,7 +92,7 @@
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 @@
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;
}