TOMOYO: Aggregate reader functions.

Now lists are accessible via array index. Aggregate reader functions using index.

Signed-off-by: Tetsuo Handa <penguin-kernel@I-love.SAKURA.ne.jp>
Signed-off-by: James Morris <jmorris@namei.org>

6 files changed, 200 insertions, 384 deletions

diff --git a/security/tomoyo/common.c b/security/tomoyo/common.c
index cb1aaf1..044115d 100644
--- a/security/tomoyo/common.c
+++ b/security/tomoyo/common.c
@@ -1192,75 +1192,216 @@ static int tomoyo_write_exception_policy(struct tomoyo_io_buffer *head)
 	return -EINVAL;
 }
 
+static void tomoyo_print_number(char *buffer, int buffer_len,
+			     const struct tomoyo_number_union *ptr)
+{
+	int i;
+	unsigned long min = ptr->values[0];
+	const unsigned long max = ptr->values[1];
+	u8 min_type = ptr->min_type;
+	const u8 max_type = ptr->max_type;
+	memset(buffer, 0, buffer_len);
+	buffer_len -= 2;
+	for (i = 0; i < 2; i++) {
+		int len;
+		switch (min_type) {
+		case TOMOYO_VALUE_TYPE_HEXADECIMAL:
+			snprintf(buffer, buffer_len, "0x%lX", min);
+			break;
+		case TOMOYO_VALUE_TYPE_OCTAL:
+			snprintf(buffer, buffer_len, "0%lo", min);
+			break;
+		default:
+			snprintf(buffer, buffer_len, "%lu", min);
+			break;
+		}
+		if (min == max && min_type == max_type)
+			break;
+		len = strlen(buffer);
+		buffer[len++] = '-';
+		buffer += len;
+		buffer_len -= len;
+		min_type = max_type;
+		min = max;
+	}
+}
+
+static const char *tomoyo_group_name[TOMOYO_MAX_GROUP] = {
+	[TOMOYO_PATH_GROUP] = TOMOYO_KEYWORD_PATH_GROUP,
+	[TOMOYO_NUMBER_GROUP] = TOMOYO_KEYWORD_NUMBER_GROUP
+};
+
 /**
- * tomoyo_read_exception_policy - Read exception policy.
+ * tomoyo_read_group - Read "struct tomoyo_path_group"/"struct tomoyo_number_group" list.
  *
  * @head: Pointer to "struct tomoyo_io_buffer".
+ * @idx:  Index number.
+ *
+ * Returns true on success, false otherwise.
  *
  * Caller holds tomoyo_read_lock().
  */
-static void tomoyo_read_exception_policy(struct tomoyo_io_buffer *head)
+static bool tomoyo_read_group(struct tomoyo_io_buffer *head, const int idx)
 {
-	if (!head->read_eof) {
-		switch (head->read_step) {
-		case 0:
-			head->read_var2 = NULL;
-			head->read_step = 1;
-		case 1:
-			if (!tomoyo_read_domain_keeper_policy(head))
-				break;
-			head->read_var2 = NULL;
-			head->read_step = 2;
-		case 2:
-			if (!tomoyo_read_globally_readable_policy(head))
-				break;
-			head->read_var2 = NULL;
-			head->read_step = 3;
-		case 3:
-			head->read_var2 = NULL;
-			head->read_step = 4;
-		case 4:
-			if (!tomoyo_read_domain_initializer_policy(head))
-				break;
-			head->read_var2 = NULL;
-			head->read_step = 5;
-		case 5:
-			if (!tomoyo_read_alias_policy(head))
-				break;
-			head->read_var2 = NULL;
-			head->read_step = 6;
-		case 6:
-			if (!tomoyo_read_aggregator_policy(head))
-				break;
-			head->read_var2 = NULL;
-			head->read_step = 7;
-		case 7:
-			if (!tomoyo_read_file_pattern(head))
-				break;
-			head->read_var2 = NULL;
-			head->read_step = 8;
-		case 8:
-			if (!tomoyo_read_no_rewrite_policy(head))
-				break;
-			head->read_var2 = NULL;
-			head->read_step = 9;
-		case 9:
-			if (!tomoyo_read_path_group_policy(head))
-				break;
-			head->read_var1 = NULL;
-			head->read_var2 = NULL;
-			head->read_step = 10;
-		case 10:
-			if (!tomoyo_read_number_group_policy(head))
-				break;
-			head->read_var1 = NULL;
-			head->read_var2 = NULL;
-			head->read_step = 11;
-		case 11:
-			head->read_eof = true;
+	struct list_head *gpos;
+	struct list_head *mpos;
+	const char *w[3] = { "", "", "" };
+	w[0] = tomoyo_group_name[idx];
+	list_for_each_cookie(gpos, head->read_var1, &tomoyo_group_list[idx]) {
+		struct tomoyo_group *group =
+			list_entry(gpos, struct tomoyo_group, list);
+		w[1] = group->group_name->name;
+		list_for_each_cookie(mpos, head->read_var2,
+				     &group->member_list) {
+			char buffer[128];
+			struct tomoyo_acl_head *ptr =
+				list_entry(mpos, struct tomoyo_acl_head, list);
+			if (ptr->is_deleted)
+				continue;
+			if (idx == TOMOYO_PATH_GROUP) {
+				w[2] = container_of(ptr,
+						    struct tomoyo_path_group,
+						    head)->member_name->name;
+			} else if (idx == TOMOYO_NUMBER_GROUP) {
+				tomoyo_print_number(buffer, sizeof(buffer),
+						    &container_of
+						    (ptr, struct
+						     tomoyo_number_group,
+						     head)->number);
+				w[2] = buffer;
+			}
+			if (!tomoyo_io_printf(head, "%s%s %s\n", w[0], w[1],
+					      w[2]))
+				return false;
+		}
+	}
+	return true;
+}
+
+/**
+ * tomoyo_read_policy - Read "struct tomoyo_..._entry" list.
+ *
+ * @head: Pointer to "struct tomoyo_io_buffer".
+ * @idx:  Index number.
+ *
+ * Returns true on success, false otherwise.
+ *
+ * Caller holds tomoyo_read_lock().
+ */
+static bool tomoyo_read_policy(struct tomoyo_io_buffer *head, const int idx)
+{
+	struct list_head *pos;
+	list_for_each_cookie(pos, head->read_var2, &tomoyo_policy_list[idx]) {
+		const char *w[4] = { "", "", "", "" };
+		struct tomoyo_acl_head *acl = container_of(pos, typeof(*acl),
+							   list);
+		if (acl->is_deleted)
+			continue;
+		switch (idx) {
+		case TOMOYO_ID_DOMAIN_KEEPER:
+			{
+				struct tomoyo_domain_keeper_entry *ptr =
+					container_of(acl, typeof(*ptr), head);
+				w[0] = ptr->is_not ?
+					TOMOYO_KEYWORD_NO_KEEP_DOMAIN :
+					TOMOYO_KEYWORD_KEEP_DOMAIN;
+				if (ptr->program) {
+					w[1] = ptr->program->name;
+					w[2] = " from ";
+				}
+				w[3] = ptr->domainname->name;
+			}
+			break;
+		case TOMOYO_ID_DOMAIN_INITIALIZER:
+			{
+				struct tomoyo_domain_initializer_entry *ptr =
+					container_of(acl, typeof(*ptr), head);
+				w[0] = ptr->is_not ?
+					TOMOYO_KEYWORD_NO_INITIALIZE_DOMAIN :
+					TOMOYO_KEYWORD_INITIALIZE_DOMAIN;
+				w[1] = ptr->program->name;
+				if (ptr->domainname) {
+					w[2] = " from ";
+					w[3] = ptr->domainname->name;
+				}
+			}
 			break;
+		case TOMOYO_ID_GLOBALLY_READABLE:
+			{
+				struct tomoyo_globally_readable_file_entry *ptr
+					= container_of(acl, typeof(*ptr), head);
+				w[0] = TOMOYO_KEYWORD_ALLOW_READ;
+				w[1] = ptr->filename->name;
+			}
+			break;
+		case TOMOYO_ID_ALIAS:
+			{
+				struct tomoyo_alias_entry *ptr =
+					container_of(acl, typeof(*ptr), head);
+				w[0] = TOMOYO_KEYWORD_ALIAS;
+				w[1] = ptr->original_name->name;
+				w[2] = " ";
+				w[3] = ptr->aliased_name->name;
+			}
+			break;
+		case TOMOYO_ID_AGGREGATOR:
+			{
+				struct tomoyo_aggregator_entry *ptr =
+					container_of(acl, typeof(*ptr), head);
+				w[0] = TOMOYO_KEYWORD_AGGREGATOR;
+				w[1] = ptr->original_name->name;
+				w[2] = " ";
+				w[3] = ptr->aggregated_name->name;
+			}
+			break;
+		case TOMOYO_ID_PATTERN:
+			{
+				struct tomoyo_pattern_entry *ptr =
+					container_of(acl, typeof(*ptr), head);
+				w[0] = TOMOYO_KEYWORD_FILE_PATTERN;
+				w[1] = ptr->pattern->name;
+			}
+			break;
+		case TOMOYO_ID_NO_REWRITE:
+			{
+				struct tomoyo_no_rewrite_entry *ptr =
+					container_of(acl, typeof(*ptr), head);
+				w[0] = TOMOYO_KEYWORD_DENY_REWRITE;
+				w[1] = ptr->pattern->name;
+			}
+			break;
+		default:
+			continue;
 		}
+		if (!tomoyo_io_printf(head, "%s%s%s%s\n", w[0], w[1], w[2],
+				      w[3]))
+			return false;
 	}
+	return true;
+}
+
+/**
+ * tomoyo_read_exception_policy - Read exception policy.
+ *
+ * @head: Pointer to "struct tomoyo_io_buffer".
+ *
+ * Caller holds tomoyo_read_lock().
+ */
+static void tomoyo_read_exception_policy(struct tomoyo_io_buffer *head)
+{
+	if (head->read_eof)
+		return;
+	while (head->read_step < TOMOYO_MAX_POLICY &&
+	       tomoyo_read_policy(head, head->read_step))
+		head->read_step++;
+	if (head->read_step < TOMOYO_MAX_POLICY)
+		return;
+	while (head->read_step < TOMOYO_MAX_POLICY + TOMOYO_MAX_GROUP &&
+	       tomoyo_read_group(head, head->read_step - TOMOYO_MAX_POLICY))
+		head->read_step++;
+	if (head->read_step < TOMOYO_MAX_POLICY + TOMOYO_MAX_GROUP)
+		return;
+	head->read_eof = true;
 }
 
 /**
diff --git a/security/tomoyo/common.h b/security/tomoyo/common.h
index 451dc3c..21eb1e7 100644
--- a/security/tomoyo/common.h
+++ b/security/tomoyo/common.h
@@ -794,28 +794,6 @@ bool tomoyo_path_matches_pattern(const struct tomoyo_path_info *filename,
 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 "aggregator" entry in exception policy. */
-bool tomoyo_read_aggregator_policy(struct tomoyo_io_buffer *head);
-/* 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? */
diff --git a/security/tomoyo/domain.c b/security/tomoyo/domain.c
index 3575b0e..038071a 100644
--- a/security/tomoyo/domain.c
+++ b/security/tomoyo/domain.c
@@ -210,45 +210,6 @@ static int tomoyo_update_domain_initializer_entry(const char *domainname,
 }
 
 /**
- * tomoyo_read_domain_initializer_policy - Read "struct tomoyo_domain_initializer_entry" list.
- *
- * @head: Pointer to "struct tomoyo_io_buffer".
- *
- * Returns true on success, false otherwise.
- *
- * Caller holds tomoyo_read_lock().
- */
-bool tomoyo_read_domain_initializer_policy(struct tomoyo_io_buffer *head)
-{
-	struct list_head *pos;
-	bool done = true;
-
-	list_for_each_cookie(pos, head->read_var2, &tomoyo_policy_list
-			     [TOMOYO_ID_DOMAIN_INITIALIZER]) {
-		const char *no;
-		const char *from = "";
-		const char *domain = "";
-		struct tomoyo_domain_initializer_entry *ptr;
-		ptr = list_entry(pos, struct tomoyo_domain_initializer_entry,
-				 head.list);
-		if (ptr->head.is_deleted)
-			continue;
-		no = ptr->is_not ? "no_" : "";
-		if (ptr->domainname) {
-			from = " from ";
-			domain = ptr->domainname->name;
-		}
-		done = tomoyo_io_printf(head,
-					"%s" TOMOYO_KEYWORD_INITIALIZE_DOMAIN
-					"%s%s%s\n", no, ptr->program->name,
-					from, domain);
-		if (!done)
-			break;
-	}
-	return done;
-}
-
-/**
  * tomoyo_write_domain_initializer_policy - Write "struct tomoyo_domain_initializer_entry" list.
  *
  * @data:      String to parse.
@@ -399,46 +360,6 @@ int tomoyo_write_domain_keeper_policy(char *data, const bool is_not,
 }
 
 /**
- * tomoyo_read_domain_keeper_policy - Read "struct tomoyo_domain_keeper_entry" list.
- *
- * @head: Pointer to "struct tomoyo_io_buffer".
- *
- * Returns true on success, false otherwise.
- *
- * Caller holds tomoyo_read_lock().
- */
-bool tomoyo_read_domain_keeper_policy(struct tomoyo_io_buffer *head)
-{
-	struct list_head *pos;
-	bool done = true;
-
-	list_for_each_cookie(pos, head->read_var2,
-			     &tomoyo_policy_list[TOMOYO_ID_DOMAIN_KEEPER]) {
-		struct tomoyo_domain_keeper_entry *ptr;
-		const char *no;
-		const char *from = "";
-		const char *program = "";
-
-		ptr = list_entry(pos, struct tomoyo_domain_keeper_entry,
-				 head.list);
-		if (ptr->head.is_deleted)
-			continue;
-		no = ptr->is_not ? "no_" : "";
-		if (ptr->program) {
-			from = " from ";
-			program = ptr->program->name;
-		}
-		done = tomoyo_io_printf(head,
-					"%s" TOMOYO_KEYWORD_KEEP_DOMAIN
-					"%s%s%s\n", no, program, from,
-					ptr->domainname->name);
-		if (!done)
-			break;
-	}
-	return done;
-}
-
-/**
  * tomoyo_domain_keeper - Check whether the given program causes domain transition suppression.
  *
  * @domainname: The name of domain.
@@ -527,37 +448,6 @@ static int tomoyo_update_aggregator_entry(const char *original_name,
 }
 
 /**
- * tomoyo_read_aggregator_policy - Read "struct tomoyo_aggregator_entry" list.
- *
- * @head: Pointer to "struct tomoyo_io_buffer".
- *
- * Returns true on success, false otherwise.
- *
- * Caller holds tomoyo_read_lock().
- */
-bool tomoyo_read_aggregator_policy(struct tomoyo_io_buffer *head)
-{
-	struct list_head *pos;
-	bool done = true;
-
-	list_for_each_cookie(pos, head->read_var2,
-			     &tomoyo_policy_list[TOMOYO_ID_AGGREGATOR]) {
-		struct tomoyo_aggregator_entry *ptr;
-
-		ptr = list_entry(pos, struct tomoyo_aggregator_entry,
-				 head.list);
-		if (ptr->head.is_deleted)
-			continue;
-		done = tomoyo_io_printf(head, TOMOYO_KEYWORD_AGGREGATOR
-					"%s %s\n", ptr->original_name->name,
-					ptr->aggregated_name->name);
-		if (!done)
-			break;
-	}
-	return done;
-}
-
-/**
  * tomoyo_write_aggregator_policy - Write "struct tomoyo_aggregator_entry" list.
  *
  * @data:      String to parse.
@@ -624,36 +514,6 @@ static int tomoyo_update_alias_entry(const char *original_name,
 }
 
 /**
- * tomoyo_read_alias_policy - Read "struct tomoyo_alias_entry" list.
- *
- * @head: Pointer to "struct tomoyo_io_buffer".
- *
- * Returns true on success, false otherwise.
- *
- * Caller holds tomoyo_read_lock().
- */
-bool tomoyo_read_alias_policy(struct tomoyo_io_buffer *head)
-{
-	struct list_head *pos;
-	bool done = true;
-
-	list_for_each_cookie(pos, head->read_var2,
-			     &tomoyo_policy_list[TOMOYO_ID_ALIAS]) {
-		struct tomoyo_alias_entry *ptr;
-
-		ptr = list_entry(pos, struct tomoyo_alias_entry, head.list);
-		if (ptr->head.is_deleted)
-			continue;
-		done = tomoyo_io_printf(head, TOMOYO_KEYWORD_ALIAS "%s %s\n",
-					ptr->original_name->name,
-					ptr->aliased_name->name);
-		if (!done)
-			break;
-	}
-	return done;
-}
-
-/**
  * tomoyo_write_alias_policy - Write "struct tomoyo_alias_entry" list.
  *
  * @data:      String to parse.
diff --git a/security/tomoyo/file.c b/security/tomoyo/file.c
index df3b203..e7687eb 100644
--- a/security/tomoyo/file.c
+++ b/security/tomoyo/file.c
@@ -344,36 +344,6 @@ int tomoyo_write_globally_readable_policy(char *data, const bool is_delete)
 	return tomoyo_update_globally_readable_entry(data, is_delete);
 }
 
-/**
- * tomoyo_read_globally_readable_policy - Read "struct tomoyo_globally_readable_file_entry" list.
- *
- * @head: Pointer to "struct tomoyo_io_buffer".
- *
- * Returns true on success, false otherwise.
- *
- * Caller holds tomoyo_read_lock().
- */
-bool tomoyo_read_globally_readable_policy(struct tomoyo_io_buffer *head)
-{
-	struct list_head *pos;
-	bool done = true;
-
-	list_for_each_cookie(pos, head->read_var2,
-			     &tomoyo_policy_list[TOMOYO_ID_GLOBALLY_READABLE]) {
-		struct tomoyo_globally_readable_file_entry *ptr;
-		ptr = list_entry(pos,
-				 struct tomoyo_globally_readable_file_entry,
-				 head.list);
-		if (ptr->head.is_deleted)
-			continue;
-		done = tomoyo_io_printf(head, TOMOYO_KEYWORD_ALLOW_READ "%s\n",
-					ptr->filename->name);
-		if (!done)
-			break;
-	}
-	return done;
-}
-
 static bool tomoyo_same_pattern(const struct tomoyo_acl_head *a,
 				const struct tomoyo_acl_head *b)
 {
@@ -457,34 +427,6 @@ int tomoyo_write_pattern_policy(char *data, const bool is_delete)
 	return tomoyo_update_file_pattern_entry(data, is_delete);
 }
 
-/**
- * tomoyo_read_file_pattern - Read "struct tomoyo_pattern_entry" list.
- *
- * @head: Pointer to "struct tomoyo_io_buffer".
- *
- * Returns true on success, false otherwise.
- *
- * Caller holds tomoyo_read_lock().
- */
-bool tomoyo_read_file_pattern(struct tomoyo_io_buffer *head)
-{
-	struct list_head *pos;
-	bool done = true;
-
-	list_for_each_cookie(pos, head->read_var2,
-			     &tomoyo_policy_list[TOMOYO_ID_PATTERN]) {
-		struct tomoyo_pattern_entry *ptr;
-		ptr = list_entry(pos, struct tomoyo_pattern_entry, head.list);
-		if (ptr->head.is_deleted)
-			continue;
-		done = tomoyo_io_printf(head, TOMOYO_KEYWORD_FILE_PATTERN
-					"%s\n", ptr->pattern->name);
-		if (!done)
-			break;
-	}
-	return done;
-}
-
 static bool tomoyo_same_no_rewrite(const struct tomoyo_acl_head *a,
 				   const struct tomoyo_acl_head *b)
 {
@@ -563,35 +505,6 @@ int tomoyo_write_no_rewrite_policy(char *data, const bool is_delete)
 	return tomoyo_update_no_rewrite_entry(data, is_delete);
 }
 
-/**
- * tomoyo_read_no_rewrite_policy - Read "struct tomoyo_no_rewrite_entry" list.
- *
- * @head: Pointer to "struct tomoyo_io_buffer".
- *
- * Returns true on success, false otherwise.
- *
- * Caller holds tomoyo_read_lock().
- */
-bool tomoyo_read_no_rewrite_policy(struct tomoyo_io_buffer *head)
-{
-	struct list_head *pos;
-	bool done = true;
-
-	list_for_each_cookie(pos, head->read_var2,
-			     &tomoyo_policy_list[TOMOYO_ID_NO_REWRITE]) {
-		struct tomoyo_no_rewrite_entry *ptr;
-		ptr = list_entry(pos, struct tomoyo_no_rewrite_entry,
-				 head.list);
-		if (ptr->head.is_deleted)
-			continue;
-		done = tomoyo_io_printf(head, TOMOYO_KEYWORD_DENY_REWRITE
-					"%s\n", ptr->pattern->name);
-		if (!done)
-			break;
-	}
-	return done;
-}
-
 static bool tomoyo_check_path_acl(const struct tomoyo_request_info *r,
 				  const struct tomoyo_acl_info *ptr)
 {
diff --git a/security/tomoyo/number_group.c b/security/tomoyo/number_group.c
index 9969415..5e75f53 100644
--- a/security/tomoyo/number_group.c
+++ b/security/tomoyo/number_group.c
@@ -97,47 +97,6 @@ int tomoyo_write_number_group_policy(char *data, const bool is_delete)
 }
 
 /**
- * tomoyo_read_number_group_policy - Read "struct tomoyo_number_group" list.
- *
- * @head: Pointer to "struct tomoyo_io_buffer".
- *
- * Returns true on success, false otherwise.
- *
- * Caller holds tomoyo_read_lock().
- */
-bool tomoyo_read_number_group_policy(struct tomoyo_io_buffer *head)
-{
-	struct list_head *gpos;
-	struct list_head *mpos;
-	list_for_each_cookie(gpos, head->read_var1,
-			     &tomoyo_group_list[TOMOYO_NUMBER_GROUP]) {
-		struct tomoyo_group *group;
-		const char *name;
-		group = list_entry(gpos, struct tomoyo_group, list);
-		name = group->group_name->name;
-		list_for_each_cookie(mpos, head->read_var2,
-				     &group->member_list) {
-			int pos;
-			const struct tomoyo_number_group *member
-				= list_entry(mpos,
-					     struct tomoyo_number_group,
-					     head.list);
-			if (member->head.is_deleted)
-				continue;
-			pos = head->read_avail;
-			if (!tomoyo_io_printf(head, TOMOYO_KEYWORD_NUMBER_GROUP
-					      "%s", name) ||
-			    !tomoyo_print_number_union(head, &member->number) ||
-			    !tomoyo_io_printf(head, "\n")) {
-				head->read_avail = pos;
-				return false;
-			}
-		}
-	}
-	return true;
-}
-
-/**
  * tomoyo_number_matches_group - Check whether the given number matches members of the given number group.
  *
  * @min:   Min number.
diff --git a/security/tomoyo/path_group.c b/security/tomoyo/path_group.c
index 44e8a5b..2f9f924 100644
--- a/security/tomoyo/path_group.c
+++ b/security/tomoyo/path_group.c
@@ -95,41 +95,6 @@ int tomoyo_write_path_group_policy(char *data, const bool is_delete)
 }
 
 /**
- * tomoyo_read_path_group_policy - Read "struct tomoyo_path_group" list.
- *
- * @head: Pointer to "struct tomoyo_io_buffer".
- *
- * Returns true on success, false otherwise.
- *
- * Caller holds tomoyo_read_lock().
- */
-bool tomoyo_read_path_group_policy(struct tomoyo_io_buffer *head)
-{
-	struct list_head *gpos;
-	struct list_head *mpos;
-	list_for_each_cookie(gpos, head->read_var1,
-			     &tomoyo_group_list[TOMOYO_PATH_GROUP]) {
-		struct tomoyo_group *group;
-		group = list_entry(gpos, struct tomoyo_group, list);
-		list_for_each_cookie(mpos, head->read_var2,
-				     &group->member_list) {
-			struct tomoyo_path_group *member;
-			member = list_entry(mpos,
-					    struct tomoyo_path_group,
-					    head.list);
-			if (member->head.is_deleted)
-				continue;
-			if (!tomoyo_io_printf(head, TOMOYO_KEYWORD_PATH_GROUP
-					      "%s %s\n",
-					      group->group_name->name,
-					      member->member_name->name))
-				return false;
-		}
-	}
-	return true;
-}
-
-/**
  * tomoyo_path_matches_group - Check whether the given pathname matches members of the given pathname group.
  *
  * @pathname:        The name of pathname.