[PATCH v3 11/13] fuse: copy_file_range needs to strip setuid bits and update timestamps

From: Amir Goldstein <amir73il@gmail.com>
To: "Darrick J . Wong" <darrick.wong@oracle.com>
Cc: Dave Chinner <david@fromorbit.com>,
	Christoph Hellwig <hch@lst.de>,
	linux-xfs@vger.kernel.org,
	Olga Kornievskaia <olga.kornievskaia@gmail.com>,
	Luis Henriques <lhenriques@suse.com>,
	Al Viro <viro@zeniv.linux.org.uk>,
	linux-fsdevel@vger.kernel.org, linux-api@vger.kernel.org,
	ceph-devel@vger.kernel.org, linux-nfs@vger.kernel.org,
	linux-cifs@vger.kernel.org
Subject: [PATCH v3 11/13] fuse: copy_file_range needs to strip setuid bits and update timestamps
Date: Wed, 29 May 2019 20:43:15 +0300	[thread overview]
Message-ID: <20190529174318.22424-12-amir73il@gmail.com> (raw)
In-Reply-To: <20190529174318.22424-1-amir73il@gmail.com>

Like ->write_iter(), we update mtime and strip setuid of dst file before
copy and like ->read_iter(), we update atime of src file after copy.

Signed-off-by: Amir Goldstein <amir73il@gmail.com>
---
 fs/fuse/file.c | 5 +++++
 1 file changed, 5 insertions(+)

diff --git a/fs/fuse/file.c b/fs/fuse/file.c
index e03901ae729b..7f33d68f66d9 100644
--- a/fs/fuse/file.c
+++ b/fs/fuse/file.c
@@ -3128,6 +3128,10 @@ static ssize_t __fuse_copy_file_range(struct file *file_in, loff_t pos_in,
 
 	inode_lock(inode_out);
 
+	err = file_modified(file_out);
+	if (err)
+		goto out;
+
 	if (fc->writeback_cache) {
 		err = filemap_write_and_wait_range(inode_out->i_mapping,
 						   pos_out, pos_out + len);
@@ -3169,6 +3173,7 @@ static ssize_t __fuse_copy_file_range(struct file *file_in, loff_t pos_in,
 		clear_bit(FUSE_I_SIZE_UNSTABLE, &fi_out->state);
 
 	inode_unlock(inode_out);
+	file_accessed(file_in);
 
 	return err;
 }
-- 
2.17.1

