From: David Howells <dhowells@redhat.com>
To: Christian Brauner <brauner@kernel.org>
Cc: dhowells@redhat.com, Jeff Layton <jlayton@kernel.org>,
Eric Van Hensbergen <ericvh@kernel.org>,
Latchesar Ionkov <lucho@ionkov.net>,
Dominique Martinet <asmadeus@codewreck.org>,
Christian Schoenebeck <linux_oss@crudebyte.com>,
Marc Dionne <marc.dionne@auristor.com>,
netfs@lists.linux.dev, linux-fsdevel@vger.kernel.org,
v9fs@lists.linux.dev, linux-afs@lists.infradead.org,
linux-kernel@vger.kernel.org
Subject: [PATCH] netfs: Fix writethrough-mode error handling
Date: Wed, 17 Apr 2024 09:47:19 +0100 [thread overview]
Message-ID: <6736.1713343639@warthog.procyon.org.uk> (raw)
Fix the error return in netfs_perform_write() acting in writethrough-mode
to return any cached error in the case that netfs_end_writethrough()
returns 0.
This can affect the use of O_SYNC/O_DSYNC/RWF_SYNC/RWF_DSYNC in 9p and afs.
Fixes: 41d8e7673a77 ("netfs: Implement a write-through caching option")
Signed-off-by: David Howells <dhowells@redhat.com>
Reviewed-by: Jeff Layton <jlayton@kernel.org>
cc: Eric Van Hensbergen <ericvh@kernel.org>
cc: Latchesar Ionkov <lucho@ionkov.net>
cc: Dominique Martinet <asmadeus@codewreck.org>
cc: Christian Schoenebeck <linux_oss@crudebyte.com>
cc: Marc Dionne <marc.dionne@auristor.com>
cc: netfs@lists.linux.dev
cc: linux-fsdevel@vger.kernel.org
cc: v9fs@lists.linux.dev
cc: linux-afs@lists.infradead.org
---
fs/netfs/buffered_write.c | 10 ++++++----
1 file changed, 6 insertions(+), 4 deletions(-)
diff --git a/fs/netfs/buffered_write.c b/fs/netfs/buffered_write.c
index 9a0d32e4b422..8f13ca8fbc74 100644
--- a/fs/netfs/buffered_write.c
+++ b/fs/netfs/buffered_write.c
@@ -164,7 +164,7 @@ ssize_t netfs_perform_write(struct kiocb *iocb, struct iov_iter *iter,
enum netfs_how_to_modify howto;
enum netfs_folio_trace trace;
unsigned int bdp_flags = (iocb->ki_flags & IOCB_SYNC) ? 0: BDP_ASYNC;
- ssize_t written = 0, ret;
+ ssize_t written = 0, ret, ret2;
loff_t i_size, pos = iocb->ki_pos, from, to;
size_t max_chunk = PAGE_SIZE << MAX_PAGECACHE_ORDER;
bool maybe_trouble = false;
@@ -395,10 +395,12 @@ ssize_t netfs_perform_write(struct kiocb *iocb, struct iov_iter *iter,
out:
if (unlikely(wreq)) {
- ret = netfs_end_writethrough(wreq, iocb);
+ ret2 = netfs_end_writethrough(wreq, iocb);
wbc_detach_inode(&wbc);
- if (ret == -EIOCBQUEUED)
- return ret;
+ if (ret2 == -EIOCBQUEUED)
+ return ret2;
+ if (ret == 0)
+ ret = ret2;
}
iocb->ki_pos += written;
next reply other threads:[~2024-04-17 8:47 UTC|newest]
Thread overview: 2+ messages / expand[flat|nested] mbox.gz Atom feed top
2024-04-17 8:47 David Howells [this message]
2024-04-17 11:26 ` [PATCH] netfs: Fix writethrough-mode error handling Christian Brauner
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