[PATCH 1/2] efivarfs: Update inode modification time for successful writes

From: Tony Luck <tony.luck@intel.com>
To: Ard Biesheuvel <ardb@kernel.org>
Cc: Tony Luck <tony.luck@intel.com>,
	Lennart Poettering <mzxreary@0pointer.de>,
	Matthew Garrett <matthew.garrett@nebula.com>,
	Jeremy Kerr <jk@ozlabs.org>,
	linux-efi@vger.kernel.org, linux-kernel@vger.kernel.org
Subject: [PATCH 1/2] efivarfs: Update inode modification time for successful writes
Date: Thu, 28 May 2020 12:49:04 -0700	[thread overview]
Message-ID: <20200528194905.690-2-tony.luck@intel.com> (raw)
In-Reply-To: <20200528194905.690-1-tony.luck@intel.com>

Some applications want to be able to see when EFI variables
have been updated.

Update the modification time for successful writes.

Reported-by: Lennart Poettering <mzxreary@0pointer.de>
Signed-off-by: Tony Luck <tony.luck@intel.com>
---
 fs/efivarfs/file.c | 1 +
 1 file changed, 1 insertion(+)

diff --git a/fs/efivarfs/file.c b/fs/efivarfs/file.c
index e9e27a271af0..4b8bc4560d70 100644
--- a/fs/efivarfs/file.c
+++ b/fs/efivarfs/file.c
@@ -51,6 +51,7 @@ static ssize_t efivarfs_file_write(struct file *file,
 	} else {
 		inode_lock(inode);
 		i_size_write(inode, datasize + sizeof(attributes));
+		inode->i_mtime = current_time(inode);
 		inode_unlock(inode);
 	}
 
-- 
2.21.1

