efivarfs: abstract initial variable creation routine

Reuse later for variable creation after hibernation

Signed-off-by: James Bottomley <James.Bottomley@HansenPartnership.com>
Signed-off-by: Ard Biesheuvel <ardb@kernel.org>

Author: James Bottomley

fs/efivarfs/super.c

@@ -226,26 +226,18 @@ bool efivarfs_variable_is_present(efi_char16_t *variable_name,
 	return dentry != NULL;
 }
 
-static int efivarfs_callback(efi_char16_t *name16, efi_guid_t vendor,
-			     unsigned long name_size, void *data)
+static int efivarfs_create_dentry(struct super_block *sb, efi_char16_t *name16,
+				  unsigned long name_size, efi_guid_t vendor,
+				  char *name)
 {
-	struct super_block *sb = (struct super_block *)data;
 	struct efivar_entry *entry;
-	struct inode *inode = NULL;
+	struct inode *inode;
 	struct dentry *dentry, *root = sb->s_root;
 	unsigned long size = 0;
-	char *name;
 	int len;
 	int err = -ENOMEM;
 	bool is_removable = false;
 
-	if (guid_equal(&vendor, &LINUX_EFI_RANDOM_SEED_TABLE_GUID))
-		return 0;
-
-	name = efivar_get_utf8name(name16, &vendor);
-	if (!name)
-		return err;
-
 	/* length of the variable name itself: remove GUID and separator */
 	len = strlen(name) - EFI_VARIABLE_GUID_LEN - 1;
 
@@ -289,6 +281,22 @@ static int efivarfs_callback(efi_char16_t *name16, efi_guid_t vendor,
 	return err;
 }
 
+static int efivarfs_callback(efi_char16_t *name16, efi_guid_t vendor,
+			     unsigned long name_size, void *data)
+{
+	struct super_block *sb = (struct super_block *)data;
+	char *name;
+
+	if (guid_equal(&vendor, &LINUX_EFI_RANDOM_SEED_TABLE_GUID))
+		return 0;
+
+	name = efivar_get_utf8name(name16, &vendor);
+	if (!name)
+		return -ENOMEM;
+
+	return efivarfs_create_dentry(sb, name16, name_size, vendor, name);
+}
+
 enum {
 	Opt_uid, Opt_gid,
 };