TOMOYO: Split file access control functions by type of parameters.

Check numeric parameters for operations that deal them
(e.g. chmod/chown/ioctl).

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

1 files changed, 501 insertions, 87 deletions

diff --git a/security/tomoyo/file.c b/security/tomoyo/file.c
index f1d2adf..727cc72 100644
--- a/security/tomoyo/file.c
+++ b/security/tomoyo/file.c
@@ -12,39 +12,49 @@
 #include "common.h"
 #include <linux/slab.h>
 
-/* Keyword array for single path operations. */
+/* Keyword array for operations with one pathname. */
 static const char *tomoyo_path_keyword[TOMOYO_MAX_PATH_OPERATION] = {
 	[TOMOYO_TYPE_READ_WRITE] = "read/write",
 	[TOMOYO_TYPE_EXECUTE]    = "execute",
 	[TOMOYO_TYPE_READ]       = "read",
 	[TOMOYO_TYPE_WRITE]      = "write",
-	[TOMOYO_TYPE_CREATE]     = "create",
 	[TOMOYO_TYPE_UNLINK]     = "unlink",
-	[TOMOYO_TYPE_MKDIR]      = "mkdir",
 	[TOMOYO_TYPE_RMDIR]      = "rmdir",
-	[TOMOYO_TYPE_MKFIFO]     = "mkfifo",
-	[TOMOYO_TYPE_MKSOCK]     = "mksock",
-	[TOMOYO_TYPE_MKBLOCK]    = "mkblock",
-	[TOMOYO_TYPE_MKCHAR]     = "mkchar",
 	[TOMOYO_TYPE_TRUNCATE]   = "truncate",
 	[TOMOYO_TYPE_SYMLINK]    = "symlink",
 	[TOMOYO_TYPE_REWRITE]    = "rewrite",
-	[TOMOYO_TYPE_IOCTL]      = "ioctl",
-	[TOMOYO_TYPE_CHMOD]      = "chmod",
-	[TOMOYO_TYPE_CHOWN]      = "chown",
-	[TOMOYO_TYPE_CHGRP]      = "chgrp",
 	[TOMOYO_TYPE_CHROOT]     = "chroot",
 	[TOMOYO_TYPE_MOUNT]      = "mount",
 	[TOMOYO_TYPE_UMOUNT]     = "unmount",
 };
 
-/* Keyword array for double path operations. */
+/* Keyword array for operations with one pathname and three numbers. */
+static const char *tomoyo_path_number3_keyword
+[TOMOYO_MAX_PATH_NUMBER3_OPERATION] = {
+	[TOMOYO_TYPE_MKBLOCK]    = "mkblock",
+	[TOMOYO_TYPE_MKCHAR]     = "mkchar",
+};
+
+/* Keyword array for operations with two pathnames. */
 static const char *tomoyo_path2_keyword[TOMOYO_MAX_PATH2_OPERATION] = {
-	[TOMOYO_TYPE_LINK]    = "link",
-	[TOMOYO_TYPE_RENAME]  = "rename",
+	[TOMOYO_TYPE_LINK]       = "link",
+	[TOMOYO_TYPE_RENAME]     = "rename",
 	[TOMOYO_TYPE_PIVOT_ROOT] = "pivot_root",
 };
 
+/* Keyword array for operations with one pathname and one number. */
+static const char *tomoyo_path_number_keyword
+[TOMOYO_MAX_PATH_NUMBER_OPERATION] = {
+	[TOMOYO_TYPE_CREATE]     = "create",
+	[TOMOYO_TYPE_MKDIR]      = "mkdir",
+	[TOMOYO_TYPE_MKFIFO]     = "mkfifo",
+	[TOMOYO_TYPE_MKSOCK]     = "mksock",
+	[TOMOYO_TYPE_IOCTL]      = "ioctl",
+	[TOMOYO_TYPE_CHMOD]      = "chmod",
+	[TOMOYO_TYPE_CHOWN]      = "chown",
+	[TOMOYO_TYPE_CHGRP]      = "chgrp",
+};
+
 void tomoyo_put_name_union(struct tomoyo_name_union *ptr)
 {
 	if (!ptr)
@@ -159,6 +169,19 @@ const char *tomoyo_path2keyword(const u8 operation)
 }
 
 /**
+ * tomoyo_path_number32keyword - Get the name of path/number/number/number operations.
+ *
+ * @operation: Type of operation.
+ *
+ * Returns the name of path/number/number/number operation.
+ */
+const char *tomoyo_path_number32keyword(const u8 operation)
+{
+	return (operation < TOMOYO_MAX_PATH_NUMBER3_OPERATION)
+		? tomoyo_path_number3_keyword[operation] : NULL;
+}
+
+/**
  * tomoyo_path22keyword - Get the name of double path operation.
  *
  * @operation: Type of operation.
@@ -172,6 +195,19 @@ const char *tomoyo_path22keyword(const u8 operation)
 }
 
 /**
+ * tomoyo_path_number2keyword - Get the name of path/number operations.
+ *
+ * @operation: Type of operation.
+ *
+ * Returns the name of path/number operation.
+ */
+const char *tomoyo_path_number2keyword(const u8 operation)
+{
+	return (operation < TOMOYO_MAX_PATH_NUMBER_OPERATION)
+		? tomoyo_path_number_keyword[operation] : NULL;
+}
+
+/**
  * tomoyo_strendswith - Check whether the token ends with the given token.
  *
  * @name: The token to check.
@@ -665,8 +701,8 @@ bool tomoyo_read_no_rewrite_policy(struct tomoyo_io_buffer *head)
 /**
  * tomoyo_update_file_acl - Update file's read/write/execute ACL.
  *
- * @filename:  Filename.
  * @perm:      Permission (between 1 to 7).
+ * @filename:  Filename.
  * @domain:    Pointer to "struct tomoyo_domain_info".
  * @is_delete: True if it is a delete request.
  *
@@ -679,7 +715,7 @@ bool tomoyo_read_no_rewrite_policy(struct tomoyo_io_buffer *head)
  *
  * Caller holds tomoyo_read_lock().
  */
-static int tomoyo_update_file_acl(const char *filename, u8 perm,
+static int tomoyo_update_file_acl(u8 perm, const char *filename,
 				  struct tomoyo_domain_info * const domain,
 				  const bool is_delete)
 {
@@ -731,14 +767,8 @@ static int tomoyo_path_acl(const struct tomoyo_request_info *r,
 		if (ptr->type != TOMOYO_TYPE_PATH_ACL)
 			continue;
 		acl = container_of(ptr, struct tomoyo_path_acl, head);
-		if (perm <= 0xFFFF) {
-			if (!(acl->perm & perm))
-				continue;
-		} else {
-			if (!(acl->perm_high & (perm >> 16)))
-				continue;
-		}
-		if (!tomoyo_compare_name_union_pattern(filename, &acl->name,
+		if (!(acl->perm & perm) ||
+		    !tomoyo_compare_name_union_pattern(filename, &acl->name,
                                                        may_use_pattern))
 			continue;
 		error = 0;
@@ -796,61 +826,13 @@ static int tomoyo_file_perm(struct tomoyo_request_info *r,
 		/* Don't use patterns for execute permission. */
 		const struct tomoyo_path_info *patterned_file = (mode != 1) ?
 			tomoyo_get_file_pattern(filename) : filename;
-		tomoyo_update_file_acl(patterned_file->name, mode,
-				       r->domain, false);
+		tomoyo_update_file_acl(mode, patterned_file->name, r->domain,
+				       false);
 	}
 	return 0;
 }
 
 /**
- * tomoyo_write_file_policy - Update file related list.
- *
- * @data:      String to parse.
- * @domain:    Pointer to "struct tomoyo_domain_info".
- * @is_delete: True if it is a delete request.
- *
- * Returns 0 on success, negative value otherwise.
- *
- * Caller holds tomoyo_read_lock().
- */
-int tomoyo_write_file_policy(char *data, struct tomoyo_domain_info *domain,
-			     const bool is_delete)
-{
-	char *filename = strchr(data, ' ');
-	char *filename2;
-	unsigned int perm;
-	u8 type;
-
-	if (!filename)
-		return -EINVAL;
-	*filename++ = '\0';
-	if (sscanf(data, "%u", &perm) == 1)
-		return tomoyo_update_file_acl(filename, (u8) perm, domain,
-					      is_delete);
-	if (strncmp(data, "allow_", 6))
-		goto out;
-	data += 6;
-	for (type = 0; type < TOMOYO_MAX_PATH_OPERATION; type++) {
-		if (strcmp(data, tomoyo_path_keyword[type]))
-			continue;
-		return tomoyo_update_path_acl(type, filename, domain,
-					      is_delete);
-	}
-	filename2 = strchr(filename, ' ');
-	if (!filename2)
-		goto out;
-	*filename2++ = '\0';
-	for (type = 0; type < TOMOYO_MAX_PATH2_OPERATION; type++) {
-		if (strcmp(data, tomoyo_path2_keyword[type]))
-			continue;
-		return tomoyo_update_path2_acl(type, filename, filename2,
-					       domain, is_delete);
-	}
- out:
-	return -EINVAL;
-}
-
-/**
  * tomoyo_update_path_acl - Update "struct tomoyo_path_acl" list.
  *
  * @type:      Type of operation.
@@ -866,13 +848,12 @@ static int tomoyo_update_path_acl(const u8 type, const char *filename,
 				  struct tomoyo_domain_info *const domain,
 				  const bool is_delete)
 {
-	static const u32 tomoyo_rw_mask =
+	static const u16 tomoyo_rw_mask =
 		(1 << TOMOYO_TYPE_READ) | (1 << TOMOYO_TYPE_WRITE);
-	const u32 perm = 1 << type;
+	const u16 perm = 1 << type;
 	struct tomoyo_acl_info *ptr;
 	struct tomoyo_path_acl e = {
 		.head.type = TOMOYO_TYPE_PATH_ACL,
-		.perm_high = perm >> 16,
 		.perm = perm
 	};
 	int error = is_delete ? -ENOENT : -ENOMEM;
@@ -891,19 +872,13 @@ static int tomoyo_update_path_acl(const u8 type, const char *filename,
 		if (!tomoyo_is_same_path_acl(acl, &e))
 			continue;
 		if (is_delete) {
-			if (perm <= 0xFFFF)
-				acl->perm &= ~perm;
-			else
-				acl->perm_high &= ~(perm >> 16);
+			acl->perm &= ~perm;
 			if ((acl->perm & tomoyo_rw_mask) != tomoyo_rw_mask)
 				acl->perm &= ~(1 << TOMOYO_TYPE_READ_WRITE);
 			else if (!(acl->perm & (1 << TOMOYO_TYPE_READ_WRITE)))
 				acl->perm &= ~tomoyo_rw_mask;
 		} else {
-			if (perm <= 0xFFFF)
-				acl->perm |= perm;
-			else
-				acl->perm_high |= (perm >> 16);
+			acl->perm |= perm;
 			if ((acl->perm & tomoyo_rw_mask) == tomoyo_rw_mask)
 				acl->perm |= 1 << TOMOYO_TYPE_READ_WRITE;
 			else if (acl->perm & (1 << TOMOYO_TYPE_READ_WRITE))
@@ -928,6 +903,71 @@ static int tomoyo_update_path_acl(const u8 type, const char *filename,
 }
 
 /**
+ * tomoyo_update_path_number3_acl - Update "struct tomoyo_path_number3_acl" list.
+ *
+ * @type:      Type of operation.
+ * @filename:  Filename.
+ * @mode:      Create mode.
+ * @major:     Device major number.
+ * @minor:     Device minor number.
+ * @domain:    Pointer to "struct tomoyo_domain_info".
+ * @is_delete: True if it is a delete request.
+ *
+ * Returns 0 on success, negative value otherwise.
+ */
+static inline int tomoyo_update_path_number3_acl(const u8 type,
+						 const char *filename,
+						 char *mode,
+						 char *major, char *minor,
+						 struct tomoyo_domain_info *
+						 const domain,
+						 const bool is_delete)
+{
+	const u8 perm = 1 << type;
+	struct tomoyo_acl_info *ptr;
+	struct tomoyo_path_number3_acl e = {
+		.head.type = TOMOYO_TYPE_PATH_NUMBER3_ACL,
+		.perm = perm
+	};
+	int error = is_delete ? -ENOENT : -ENOMEM;
+	if (!tomoyo_parse_name_union(filename, &e.name) ||
+	    !tomoyo_parse_number_union(mode, &e.mode) ||
+	    !tomoyo_parse_number_union(major, &e.major) ||
+	    !tomoyo_parse_number_union(minor, &e.minor))
+		goto out;
+	if (mutex_lock_interruptible(&tomoyo_policy_lock))
+		goto out;
+	list_for_each_entry_rcu(ptr, &domain->acl_info_list, list) {
+		struct tomoyo_path_number3_acl *acl =
+			container_of(ptr, struct tomoyo_path_number3_acl, head);
+		if (!tomoyo_is_same_path_number3_acl(acl, &e))
+			continue;
+		if (is_delete)
+			acl->perm &= ~perm;
+		else
+			acl->perm |= perm;
+		error = 0;
+		break;
+	}
+	if (!is_delete && error) {
+		struct tomoyo_path_number3_acl *entry =
+			tomoyo_commit_ok(&e, sizeof(e));
+		if (entry) {
+			list_add_tail_rcu(&entry->head.list,
+					  &domain->acl_info_list);
+			error = 0;
+		}
+	}
+	mutex_unlock(&tomoyo_policy_lock);
+ out:
+	tomoyo_put_name_union(&e.name);
+	tomoyo_put_number_union(&e.mode);
+	tomoyo_put_number_union(&e.major);
+	tomoyo_put_number_union(&e.minor);
+	return error;
+}
+
+/**
  * tomoyo_update_path2_acl - Update "struct tomoyo_path2_acl" list.
  *
  * @type:      Type of operation.
@@ -989,6 +1029,50 @@ static int tomoyo_update_path2_acl(const u8 type, const char *filename1,
 }
 
 /**
+ * tomoyo_path_number3_acl - Check permission for path/number/number/number operation.
+ *
+ * @r:        Pointer to "struct tomoyo_request_info".
+ * @filename: Filename to check.
+ * @perm:     Permission.
+ * @mode:     Create mode.
+ * @major:    Device major number.
+ * @minor:    Device minor number.
+ *
+ * Returns 0 on success, -EPERM otherwise.
+ *
+ * Caller holds tomoyo_read_lock().
+ */
+static int tomoyo_path_number3_acl(struct tomoyo_request_info *r,
+				   const struct tomoyo_path_info *filename,
+				   const u16 perm, const unsigned int mode,
+				   const unsigned int major,
+				   const unsigned int minor)
+{
+	struct tomoyo_domain_info *domain = r->domain;
+	struct tomoyo_acl_info *ptr;
+	int error = -EPERM;
+	list_for_each_entry_rcu(ptr, &domain->acl_info_list, list) {
+		struct tomoyo_path_number3_acl *acl;
+		if (ptr->type != TOMOYO_TYPE_PATH_NUMBER3_ACL)
+			continue;
+		acl = container_of(ptr, struct tomoyo_path_number3_acl, head);
+		if (!tomoyo_compare_number_union(mode, &acl->mode))
+			continue;
+		if (!tomoyo_compare_number_union(major, &acl->major))
+			continue;
+		if (!tomoyo_compare_number_union(minor, &acl->minor))
+			continue;
+		if (!(acl->perm & perm))
+			continue;
+		if (!tomoyo_compare_name_union(filename, &acl->name))
+			continue;
+		error = 0;
+		break;
+	}
+	return error;
+}
+
+/**
  * tomoyo_path2_acl - Check permission for double path operation.
  *
  * @r:         Pointer to "struct tomoyo_request_info".
@@ -1069,6 +1153,195 @@ static int tomoyo_path_permission(struct tomoyo_request_info *r, u8 operation,
 }
 
 /**
+ * tomoyo_path_number_acl - Check permission for ioctl/chmod/chown/chgrp operation.
+ *
+ * @r:        Pointer to "struct tomoyo_request_info".
+ * @type:     Operation.
+ * @filename: Filename to check.
+ * @number:   Number.
+ *
+ * Returns 0 on success, -EPERM otherwise.
+ *
+ * Caller holds tomoyo_read_lock().
+ */
+static int tomoyo_path_number_acl(struct tomoyo_request_info *r, const u8 type,
+				  const struct tomoyo_path_info *filename,
+				  const unsigned long number)
+{
+	struct tomoyo_domain_info *domain = r->domain;
+	struct tomoyo_acl_info *ptr;
+	const u8 perm = 1 << type;
+	int error = -EPERM;
+	list_for_each_entry_rcu(ptr, &domain->acl_info_list, list) {
+		struct tomoyo_path_number_acl *acl;
+		if (ptr->type != TOMOYO_TYPE_PATH_NUMBER_ACL)
+			continue;
+		acl = container_of(ptr, struct tomoyo_path_number_acl,
+				   head);
+		if (!(acl->perm & perm) ||
+		    !tomoyo_compare_number_union(number, &acl->number) ||
+		    !tomoyo_compare_name_union(filename, &acl->name))
+			continue;
+		error = 0;
+		break;
+	}
+	return error;
+}
+
+/**
+ * tomoyo_update_path_number_acl - Update ioctl/chmod/chown/chgrp ACL.
+ *
+ * @type:      Type of operation.
+ * @filename:  Filename.
+ * @number:    Number.
+ * @domain:    Pointer to "struct tomoyo_domain_info".
+ * @is_delete: True if it is a delete request.
+ *
+ * Returns 0 on success, negative value otherwise.
+ */
+static inline int tomoyo_update_path_number_acl(const u8 type,
+						const char *filename,
+						char *number,
+						struct tomoyo_domain_info *
+						const domain,
+						const bool is_delete)
+{
+	const u8 perm = 1 << type;
+	struct tomoyo_acl_info *ptr;
+	struct tomoyo_path_number_acl e = {
+		.head.type = TOMOYO_TYPE_PATH_NUMBER_ACL,
+		.perm = perm
+	};
+	int error = is_delete ? -ENOENT : -ENOMEM;
+	if (!domain)
+		return -EINVAL;
+	if (!tomoyo_parse_name_union(filename, &e.name))
+		return -EINVAL;
+	if (!tomoyo_parse_number_union(number, &e.number))
+		goto out;
+	if (mutex_lock_interruptible(&tomoyo_policy_lock))
+		goto out;
+	list_for_each_entry_rcu(ptr, &domain->acl_info_list, list) {
+		struct tomoyo_path_number_acl *acl =
+			container_of(ptr, struct tomoyo_path_number_acl, head);
+		if (!tomoyo_is_same_path_number_acl(acl, &e))
+			continue;
+		if (is_delete)
+			acl->perm &= ~perm;
+		else
+			acl->perm |= perm;
+		error = 0;
+		break;
+	}
+	if (!is_delete && error) {
+		struct tomoyo_path_number_acl *entry =
+			tomoyo_commit_ok(&e, sizeof(e));
+		if (entry) {
+			list_add_tail_rcu(&entry->head.list,
+					  &domain->acl_info_list);
+			error = 0;
+		}
+	}
+	mutex_unlock(&tomoyo_policy_lock);
+ out:
+	tomoyo_put_name_union(&e.name);
+	tomoyo_put_number_union(&e.number);
+	return error;
+}
+
+/**
+ * tomoyo_path_number_perm2 - Check permission for "create", "mkdir", "mkfifo", "mksock", "ioctl", "chmod", "chown", "chgrp".
+ *
+ * @r:        Pointer to "strct tomoyo_request_info".
+ * @filename: Filename to check.
+ * @number:   Number.
+ *
+ * Returns 0 on success, negative value otherwise.
+ *
+ * Caller holds tomoyo_read_lock().
+ */
+static int tomoyo_path_number_perm2(struct tomoyo_request_info *r,
+				    const u8 type,
+				    const struct tomoyo_path_info *filename,
+				    const unsigned long number)
+{
+	char buffer[64];
+	int error;
+	u8 radix;
+
+	if (!filename)
+		return 0;
+	switch (type) {
+	case TOMOYO_TYPE_CREATE:
+	case TOMOYO_TYPE_MKDIR:
+	case TOMOYO_TYPE_MKFIFO:
+	case TOMOYO_TYPE_MKSOCK:
+	case TOMOYO_TYPE_CHMOD:
+		radix = TOMOYO_VALUE_TYPE_OCTAL;
+		break;
+	case TOMOYO_TYPE_IOCTL:
+		radix = TOMOYO_VALUE_TYPE_HEXADECIMAL;
+		break;
+	default:
+		radix = TOMOYO_VALUE_TYPE_DECIMAL;
+		break;
+	}
+	tomoyo_print_ulong(buffer, sizeof(buffer), number, radix);
+	error = tomoyo_path_number_acl(r, type, filename, number);
+	if (!error)
+		return 0;
+	tomoyo_warn_log(r, "%s %s %s", tomoyo_path_number2keyword(type),
+			filename->name, buffer);
+	if (tomoyo_domain_quota_is_ok(r))
+		tomoyo_update_path_number_acl(type,
+					      tomoyo_get_file_pattern(filename)
+					      ->name, buffer, r->domain, false);
+	if (r->mode != TOMOYO_CONFIG_ENFORCING)
+		error = 0;
+	return error;
+}
+
+/**
+ * tomoyo_path_number_perm - Check permission for "create", "mkdir", "mkfifo", "mksock", "ioctl", "chmod", "chown", "chgrp".
+ *
+ * @type:   Type of operation.
+ * @path:   Pointer to "struct path".
+ * @number: Number.
+ *
+ * Returns 0 on success, negative value otherwise.
+ */
+int tomoyo_path_number_perm(const u8 type, struct path *path,
+			    unsigned long number)
+{
+	struct tomoyo_request_info r;
+	int error = -ENOMEM;
+	struct tomoyo_path_info *buf;
+	int idx;
+
+	if (tomoyo_init_request_info(&r, NULL) == TOMOYO_CONFIG_DISABLED ||
+	    !path->mnt || !path->dentry)
+		return 0;
+	idx = tomoyo_read_lock();
+	buf = tomoyo_get_path(path);
+	if (!buf)
+		goto out;
+	if (type == TOMOYO_TYPE_MKDIR && !buf->is_dir) {
+		/*
+		 * tomoyo_get_path() reserves space for appending "/."
+		 */
+		strcat((char *) buf->name, "/");
+		tomoyo_fill_path_info(buf);
+	}
+	error = tomoyo_path_number_perm2(&r, type, buf, number);
+ out:
+	kfree(buf);
+	tomoyo_read_unlock(idx);
+	if (r.mode != TOMOYO_CONFIG_ENFORCING)
+		error = 0;
+	return error;
+}
+
+/**
  * tomoyo_check_exec_perm - Check permission for "execute".
  *
  * @domain:   Pointer to "struct tomoyo_domain_info".
@@ -1145,7 +1418,7 @@ int tomoyo_check_open_permission(struct tomoyo_domain_info *domain,
 }
 
 /**
- * tomoyo_path_perm - Check permission for "create", "unlink", "mkdir", "rmdir", "mkfifo", "mksock", "mkblock", "mkchar", "truncate", "symlink", "rewrite", "ioctl", "chmod", "chown", "chgrp", "chroot", "mount" and "unmount".
+ * tomoyo_path_perm - Check permission for "unlink", "rmdir", "truncate", "symlink", "rewrite", "chroot", "mount" and "unmount".
  *
  * @operation: Type of operation.
  * @path:      Pointer to "struct path".
@@ -1173,7 +1446,6 @@ int tomoyo_path_perm(const u8 operation, struct path *path)
 			goto out;
 		}
 		break;
-	case TOMOYO_TYPE_MKDIR:
 	case TOMOYO_TYPE_RMDIR:
 	case TOMOYO_TYPE_CHROOT:
 		if (!buf->is_dir) {
@@ -1194,6 +1466,91 @@ int tomoyo_path_perm(const u8 operation, struct path *path)
 }
 
 /**
+ * tomoyo_path_number3_perm2 - Check permission for path/number/number/number operation.
+ *
+ * @r:         Pointer to "struct tomoyo_request_info".
+ * @operation: Type of operation.
+ * @filename:  Filename to check.
+ * @mode:      Create mode.
+ * @dev:       Device number.
+ *
+ * Returns 0 on success, negative value otherwise.
+ *
+ * Caller holds tomoyo_read_lock().
+ */
+static int tomoyo_path_number3_perm2(struct tomoyo_request_info *r,
+				     const u8 operation,
+				     const struct tomoyo_path_info *filename,
+				     const unsigned int mode,
+				     const unsigned int dev)
+{
+	int error;
+	const unsigned int major = MAJOR(dev);
+	const unsigned int minor = MINOR(dev);
+
+	error = tomoyo_path_number3_acl(r, filename, 1 << operation, mode,
+					major, minor);
+	if (!error)
+		return 0;
+	tomoyo_warn_log(r, "%s %s 0%o %u %u",
+			tomoyo_path_number32keyword(operation),
+			filename->name, mode, major, minor);
+	if (tomoyo_domain_quota_is_ok(r)) {
+		char mode_buf[64];
+		char major_buf[64];
+		char minor_buf[64];
+		memset(mode_buf, 0, sizeof(mode_buf));
+		memset(major_buf, 0, sizeof(major_buf));
+		memset(minor_buf, 0, sizeof(minor_buf));
+		snprintf(mode_buf, sizeof(mode_buf) - 1, "0%o", mode);
+		snprintf(major_buf, sizeof(major_buf) - 1, "%u", major);
+		snprintf(minor_buf, sizeof(minor_buf) - 1, "%u", minor);
+		tomoyo_update_path_number3_acl(operation,
+					       tomoyo_get_file_pattern(filename)
+					       ->name, mode_buf, major_buf,
+					       minor_buf, r->domain, false);
+	}
+	if (r->mode != TOMOYO_CONFIG_ENFORCING)
+		error = 0;
+	return error;
+}
+
+/**
+ * tomoyo_path_number3_perm - Check permission for "mkblock" and "mkchar".
+ *
+ * @operation: Type of operation. (TOMOYO_TYPE_MKCHAR or TOMOYO_TYPE_MKBLOCK)
+ * @path:      Pointer to "struct path".
+ * @mode:      Create mode.
+ * @dev:       Device number.
+ *
+ * Returns 0 on success, negative value otherwise.
+ */
+int tomoyo_path_number3_perm(const u8 operation, struct path *path,
+			     const unsigned int mode, unsigned int dev)
+{
+	struct tomoyo_request_info r;
+	int error = -ENOMEM;
+	struct tomoyo_path_info *buf;
+	int idx;
+
+	if (tomoyo_init_request_info(&r, NULL) == TOMOYO_CONFIG_DISABLED ||
+	    !path->mnt)
+		return 0;
+	idx = tomoyo_read_lock();
+	error = -ENOMEM;
+	buf = tomoyo_get_path(path);
+	if (buf) {
+		error = tomoyo_path_number3_perm2(&r, operation, buf, mode,
+						  new_decode_dev(dev));
+		kfree(buf);
+	}
+	tomoyo_read_unlock(idx);
+	if (r.mode != TOMOYO_CONFIG_ENFORCING)
+		error = 0;
+	return error;
+}
+
+/**
  * tomoyo_path2_perm - Check permission for "rename", "link" and "pivot_root".
  *
  * @operation: Type of operation.
@@ -1254,3 +1611,60 @@ int tomoyo_path2_perm(const u8 operation, struct path *path1,
 		error = 0;
 	return error;
 }
+
+/**
+ * tomoyo_write_file_policy - Update file related list.
+ *
+ * @data:      String to parse.
+ * @domain:    Pointer to "struct tomoyo_domain_info".
+ * @is_delete: True if it is a delete request.
+ *
+ * Returns 0 on success, negative value otherwise.
+ *
+ * Caller holds tomoyo_read_lock().
+ */
+int tomoyo_write_file_policy(char *data, struct tomoyo_domain_info *domain,
+			     const bool is_delete)
+{
+	char *w[5];
+	u8 type;
+	if (!tomoyo_tokenize(data, w, sizeof(w)) || !w[1][0])
+		return -EINVAL;
+	if (strncmp(w[0], "allow_", 6)) {
+		unsigned int perm;
+		if (sscanf(w[0], "%u", &perm) == 1)
+			return tomoyo_update_file_acl((u8) perm, w[1], domain,
+						      is_delete);
+		goto out;
+	}
+	w[0] += 6;
+	for (type = 0; type < TOMOYO_MAX_PATH_OPERATION; type++) {
+		if (strcmp(w[0], tomoyo_path_keyword[type]))
+			continue;
+		return tomoyo_update_path_acl(type, w[1], domain, is_delete);
+	}
+	if (!w[2][0])
+		goto out;
+	for (type = 0; type < TOMOYO_MAX_PATH2_OPERATION; type++) {
+		if (strcmp(w[0], tomoyo_path2_keyword[type]))
+			continue;
+		return tomoyo_update_path2_acl(type, w[1], w[2], domain,
+					       is_delete);
+	}
+	for (type = 0; type < TOMOYO_MAX_PATH_NUMBER_OPERATION; type++) {
+		if (strcmp(w[0], tomoyo_path_number_keyword[type]))
+			continue;
+		return tomoyo_update_path_number_acl(type, w[1], w[2], domain,
+						     is_delete);
+	}
+	if (!w[3][0] || !w[4][0])
+		goto out;
+	for (type = 0; type < TOMOYO_MAX_PATH_NUMBER3_OPERATION; type++) {
+		if (strcmp(w[0], tomoyo_path_number3_keyword[type]))
+			continue;
+		return tomoyo_update_path_number3_acl(type, w[1], w[2], w[3],
+						      w[4], domain, is_delete);
+	}
+ out:
+	return -EINVAL;
+}