tomoyo: remove "undelete domain" command.

Since TOMOYO's policy management tools does not use the "undelete domain"
command, we decided to remove that command.

Signed-off-by: Kentaro Takeda <takedakn@nttdata.co.jp>
Signed-off-by: Tetsuo Handa <penguin-kernel@I-love.SAKURA.ne.jp>
Signed-off-by: Toshiharu Harada <haradats@nttdata.co.jp>
Signed-off-by: James Morris <jmorris@namei.org>

security/tomoyo/common.c

@@ -1252,15 +1252,12 @@ static int tomoyo_write_domain_policy(struct tomoyo_io_buffer *head)
 	struct tomoyo_domain_info *domain = head->write_var1;
 	bool is_delete = false;
 	bool is_select = false;
-	bool is_undelete = false;
 	unsigned int profile;
 
 	if (tomoyo_str_starts(&data, TOMOYO_KEYWORD_DELETE))
 		is_delete = true;
 	else if (tomoyo_str_starts(&data, TOMOYO_KEYWORD_SELECT))
 		is_select = true;
-	else if (tomoyo_str_starts(&data, TOMOYO_KEYWORD_UNDELETE))
-		is_undelete = true;
 	if (is_select && tomoyo_is_select_one(head, data))
 		return 0;
 	/* Don't allow updating policies by non manager programs. */
@@ -1274,9 +1271,7 @@ static int tomoyo_write_domain_policy(struct tomoyo_io_buffer *head)
 			down_read(&tomoyo_domain_list_lock);
 			domain = tomoyo_find_domain(data);
 			up_read(&tomoyo_domain_list_lock);
-		} else if (is_undelete)
-			domain = tomoyo_undelete_domain(data);
-		else
+		} else
 			domain = tomoyo_find_or_assign_new_domain(data, 0);
 		head->write_var1 = domain;
 		return 0;

security/tomoyo/common.h

@@ -88,10 +88,7 @@ struct tomoyo_domain_info {
 	/* Name of this domain. Never NULL.          */
 	const struct tomoyo_path_info *domainname;
 	u8 profile;        /* Profile number to use. */
-	u8 is_deleted;     /* Delete flag.
-			      0 = active.
-			      1 = deleted but undeletable.
-			      255 = deleted and no longer undeletable. */
+	bool is_deleted;   /* Delete flag.           */
 	bool quota_warned; /* Quota warnning flag.   */
 	/* DOMAIN_FLAGS_*. Use tomoyo_set_domain_flag() to modify. */
 	u8 flags;
@@ -144,7 +141,6 @@ struct tomoyo_double_path_acl_record {
 #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_UNDELETE                  "undelete "
 #define TOMOYO_KEYWORD_USE_PROFILE               "use_profile "
 #define TOMOYO_KEYWORD_IGNORE_GLOBAL_ALLOW_READ  "ignore_global_allow_read"
 /* A domain definition starts with <kernel>. */
@@ -267,8 +263,6 @@ struct tomoyo_domain_info *tomoyo_find_domain(const char *domainname);
 struct tomoyo_domain_info *tomoyo_find_or_assign_new_domain(const char *
 							    domainname,
 							    const u8 profile);
-/* Undelete a domain. */
-struct tomoyo_domain_info *tomoyo_undelete_domain(const char *domainname);
 /* Check mode for specified functionality. */
 unsigned int tomoyo_check_flags(const struct tomoyo_domain_info *domain,
 				const u8 index);

security/tomoyo/domain.c

@@ -551,9 +551,7 @@ int tomoyo_write_alias_policy(char *data, const bool is_delete)
 	return tomoyo_update_alias_entry(data, cp, is_delete);
 }
 
-/* Domain create/delete/undelete handler. */
-
-/* #define TOMOYO_DEBUG_DOMAIN_UNDELETE */
+/* Domain create/delete handler. */
 
 /**
  * tomoyo_delete_domain - Delete a domain.
@@ -571,41 +569,15 @@ int tomoyo_delete_domain(char *domainname)
 	tomoyo_fill_path_info(&name);
 	/***** EXCLUSIVE SECTION START *****/
 	down_write(&tomoyo_domain_list_lock);
-#ifdef TOMOYO_DEBUG_DOMAIN_UNDELETE
-	printk(KERN_DEBUG "tomoyo_delete_domain %s\n", domainname);
-	list_for_each_entry(domain, &tomoyo_domain_list, list) {
-		if (tomoyo_pathcmp(domain->domainname, &name))
-			continue;
-		printk(KERN_DEBUG "List: %p %u\n", domain, domain->is_deleted);
-	}
-#endif
 	/* Is there an active domain? */
 	list_for_each_entry(domain, &tomoyo_domain_list, list) {
-		struct tomoyo_domain_info *domain2;
 		/* Never delete tomoyo_kernel_domain */
 		if (domain == &tomoyo_kernel_domain)
 			continue;
 		if (domain->is_deleted ||
 		    tomoyo_pathcmp(domain->domainname, &name))
 			continue;
-		/* Mark already deleted domains as non undeletable. */
-		list_for_each_entry(domain2, &tomoyo_domain_list, list) {
-			if (!domain2->is_deleted ||
-			    tomoyo_pathcmp(domain2->domainname, &name))
-				continue;
-#ifdef TOMOYO_DEBUG_DOMAIN_UNDELETE
-			if (domain2->is_deleted != 255)
-				printk(KERN_DEBUG
-				       "Marked %p as non undeletable\n",
-				       domain2);
-#endif
-			domain2->is_deleted = 255;
-		}
-		/* Delete and mark active domain as undeletable. */
-		domain->is_deleted = 1;
-#ifdef TOMOYO_DEBUG_DOMAIN_UNDELETE
-		printk(KERN_DEBUG "Marked %p as undeletable\n", domain);
-#endif
+		domain->is_deleted = true;
 		break;
 	}
 	up_write(&tomoyo_domain_list_lock);
@@ -613,58 +585,6 @@ int tomoyo_delete_domain(char *domainname)
 	return 0;
 }
 
-/**
- * tomoyo_undelete_domain - Undelete a domain.
- *
- * @domainname: The name of domain.
- *
- * Returns pointer to "struct tomoyo_domain_info" on success, NULL otherwise.
- */
-struct tomoyo_domain_info *tomoyo_undelete_domain(const char *domainname)
-{
-	struct tomoyo_domain_info *domain;
-	struct tomoyo_domain_info *candidate_domain = NULL;
-	struct tomoyo_path_info name;
-
-	name.name = domainname;
-	tomoyo_fill_path_info(&name);
-	/***** EXCLUSIVE SECTION START *****/
-	down_write(&tomoyo_domain_list_lock);
-#ifdef TOMOYO_DEBUG_DOMAIN_UNDELETE
-	printk(KERN_DEBUG "tomoyo_undelete_domain %s\n", domainname);
-	list_for_each_entry(domain, &tomoyo_domain_list, list) {
-		if (tomoyo_pathcmp(domain->domainname, &name))
-			continue;
-		printk(KERN_DEBUG "List: %p %u\n", domain, domain->is_deleted);
-	}
-#endif
-	list_for_each_entry(domain, &tomoyo_domain_list, list) {
-		if (tomoyo_pathcmp(&name, domain->domainname))
-			continue;
-		if (!domain->is_deleted) {
-			/* This domain is active. I can't undelete. */
-			candidate_domain = NULL;
-#ifdef TOMOYO_DEBUG_DOMAIN_UNDELETE
-			printk(KERN_DEBUG "%p is active. I can't undelete.\n",
-			       domain);
-#endif
-			break;
-		}
-		/* Is this domain undeletable? */
-		if (domain->is_deleted == 1)
-			candidate_domain = domain;
-	}
-	if (candidate_domain) {
-		candidate_domain->is_deleted = 0;
-#ifdef TOMOYO_DEBUG_DOMAIN_UNDELETE
-		printk(KERN_DEBUG "%p was undeleted.\n", candidate_domain);
-#endif
-	}
-	up_write(&tomoyo_domain_list_lock);
-	/***** EXCLUSIVE SECTION END *****/
-	return candidate_domain;
-}
-
 /**
  * tomoyo_find_or_assign_new_domain - Create a domain.
  *
@@ -711,10 +631,6 @@ struct tomoyo_domain_info *tomoyo_find_or_assign_new_domain(const char *
 		/***** CRITICAL SECTION END *****/
 		if (flag)
 			continue;
-#ifdef TOMOYO_DEBUG_DOMAIN_UNDELETE
-		printk(KERN_DEBUG "Reusing %p %s\n", domain,
-		       domain->domainname->name);
-#endif
 		list_for_each_entry(ptr, &domain->acl_info_list, list) {
 			ptr->type |= TOMOYO_ACL_DELETED;
 		}
@@ -722,7 +638,7 @@ struct tomoyo_domain_info *tomoyo_find_or_assign_new_domain(const char *
 		domain->profile = profile;
 		domain->quota_warned = false;
 		mb(); /* Avoid out-of-order execution. */
-		domain->is_deleted = 0;
+		domain->is_deleted = false;
 		goto out;
 	}
 	/* No memory reusable. Create using new memory. */