security: Create file_truncate hook from path_truncate hook

[linux-block.git] / security / tomoyo / tomoyo.c

diff --git a/security/tomoyo/tomoyo.c b/security/tomoyo/tomoyo.c
index 71e82d855ebfca43bc3d9f0bb7a702bbcd0ce023..af04a7b7eb28544ca435e2cdc286b1ef6732e3ab 100644 (file)
--- a/security/tomoyo/tomoyo.c
+++ b/security/tomoyo/tomoyo.c
@@ -134,6 +134,18 @@ static int tomoyo_path_truncate(const struct path *path)
        return tomoyo_path_perm(TOMOYO_TYPE_TRUNCATE, path, NULL);
 }
 
+/**
+ * tomoyo_file_truncate - Target for security_file_truncate().
+ *
+ * @file: Pointer to "struct file".
+ *
+ * Returns 0 on success, negative value otherwise.
+ */
+static int tomoyo_file_truncate(struct file *file)
+{
+       return tomoyo_path_truncate(&file->f_path);
+}
+
 /**
  * tomoyo_path_unlink - Target for security_path_unlink().
  *
@@ -545,6 +557,7 @@ static struct security_hook_list tomoyo_hooks[] __lsm_ro_after_init = {
        LSM_HOOK_INIT(bprm_check_security, tomoyo_bprm_check_security),
        LSM_HOOK_INIT(file_fcntl, tomoyo_file_fcntl),
        LSM_HOOK_INIT(file_open, tomoyo_file_open),
+       LSM_HOOK_INIT(file_truncate, tomoyo_file_truncate),
        LSM_HOOK_INIT(path_truncate, tomoyo_path_truncate),
        LSM_HOOK_INIT(path_unlink, tomoyo_path_unlink),
        LSM_HOOK_INIT(path_mkdir, tomoyo_path_mkdir),