From: Bernd Schubert <bschubert@ddn.com>
Date: Wed, 22 Oct 2025 22:21:18 +0000 (+0200)
Subject: fuse: Always flush the page cache before FOPEN_DIRECT_IO write
X-Git-Tag: v6.19-rc1~110^2~3
X-Git-Url: http://git.ipfire.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=1ce120dcefc056ce8af2486cebbb77a458aad4c3;p=thirdparty%2Fkernel%2Flinux.git

fuse: Always flush the page cache before FOPEN_DIRECT_IO write

This was done as condition on direct_io_allow_mmap, but I believe
this is not right, as a file might be open two times - once with
write-back enabled another time with FOPEN_DIRECT_IO.

Signed-off-by: Bernd Schubert <bschubert@ddn.com>
Signed-off-by: Miklos Szeredi <mszeredi@redhat.com>
---

diff --git a/fs/fuse/file.c b/fs/fuse/file.c
index b60f394df5a33..6014d588845cd 100644
--- a/fs/fuse/file.c
+++ b/fs/fuse/file.c
@@ -1619,7 +1619,7 @@ ssize_t fuse_direct_io(struct fuse_io_priv *io, struct iov_iter *iter,
 	if (!ia)
 		return -ENOMEM;
 
-	if (fopen_direct_io && fc->direct_io_allow_mmap) {
+	if (fopen_direct_io) {
 		res = filemap_write_and_wait_range(mapping, pos, pos + count - 1);
 		if (res) {
 			fuse_io_free(ia);