From: Trond Myklebust <trond.myklebust@hammerspace.com>
Date: Sat, 6 Sep 2025 14:54:13 +0000 (-0400)
Subject: NFSv4.2: Serialise O_DIRECT i/o and copy range
X-Git-Url: https://www.infradead.org/git/?a=commitdiff_plain;h=ca247c89900ae90207f4d321e260cd93b7c7d104;p=users%2Fhch%2Fmisc.git

NFSv4.2: Serialise O_DIRECT i/o and copy range

Ensure that all O_DIRECT reads and writes complete before copying a file
range, so that the destination is up to date.

Fixes: a5864c999de6 ("NFS: Do not serialise O_DIRECT reads and writes")
Signed-off-by: Trond Myklebust <trond.myklebust@hammerspace.com>
---

diff --git a/fs/nfs/nfs42proc.c b/fs/nfs/nfs42proc.c
index 1a169372ca16..6a0b5871ba3b 100644
--- a/fs/nfs/nfs42proc.c
+++ b/fs/nfs/nfs42proc.c
@@ -445,6 +445,7 @@ static ssize_t _nfs42_proc_copy(struct file *src,
 		return status;
 	}
 
+	nfs_file_block_o_direct(NFS_I(dst_inode));
 	status = nfs_sync_inode(dst_inode);
 	if (status)
 		return status;