[PATCH v2 4/9] netfs: Fix i_size update for partial transfer

[David Howells]

Fix netfs_unbuffered_write_done() to pass the amount written to
netfs_update_i_size() in the event of a partial transfer that ends in an
error.

That said, it might be better for the filesystem to mark the inode data as
invalid and recheck it in case something like a network error occurred that
prevented the reply from the server from being received.

Fixes: a0b4c7a49137e ("netfs: Fix unbuffered/DIO writes to dispatch subrequests in strict sequence")
Link: https://sashiko.dev/#/patchset/20260824120224.504575-1-dhowells%40redhat.com
Signed-off-by: David Howells <dhowells@xxxxxxxxxx>
cc: Paulo Alcantara <pc@xxxxxxxxxxxxx>
cc: netfs@xxxxxxxxxxxxxxx
cc: linux-fsdevel@xxxxxxxxxxxxxxx
---
 fs/netfs/direct_write.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/fs/netfs/direct_write.c b/fs/netfs/direct_write.c
index f7d7e1b54653..f33ccddaa826 100644
--- a/fs/netfs/direct_write.c
+++ b/fs/netfs/direct_write.c
@@ -21,7 +21,7 @@ static void netfs_unbuffered_write_done(struct netfs_io_request *wreq)
 	/* Okay, declare that all I/O is complete. */
 	trace_netfs_rreq(wreq, netfs_rreq_trace_write_done);
 
-	if (!wreq->error)
+	if (wreq->transferred)
 		netfs_update_i_size(ictx, &ictx->inode, wreq->start, wreq->transferred);
 
 	if (wreq->origin == NETFS_DIO_WRITE &&