From ef74e4453856716dbdaba06eaee5251e37e6882e Mon Sep 17 00:00:00 2001 From: Dylan Yudaken Date: Sun, 7 Jun 2026 08:31:55 +0100 Subject: nfs: expose FMODE_NOWAIT for read-only files NFS O_DIRECT reads already (mostly) handle async requests, with the exception of locking the inode for direct. Handle async requests properly by using nfs_start_io_direct_nowait, and then expose FMODE_NOWAIT since it's now supported for direct reads. Signed-off-by: Dylan Yudaken Signed-off-by: Anna Schumaker --- fs/nfs/direct.c | 12 ++++++++++-- 1 file changed, 10 insertions(+), 2 deletions(-) (limited to 'fs/nfs/direct.c') diff --git a/fs/nfs/direct.c b/fs/nfs/direct.c index 48d89716193a..e626c72495e6 100644 --- a/fs/nfs/direct.c +++ b/fs/nfs/direct.c @@ -466,14 +466,22 @@ ssize_t nfs_file_direct_read(struct kiocb *iocb, struct iov_iter *iter, goto out_release; } dreq->l_ctx = l_ctx; - if (!is_sync_kiocb(iocb)) + if (!is_sync_kiocb(iocb)) { dreq->iocb = iocb; + } else if (iocb->ki_flags & IOCB_NOWAIT) { + result = -EAGAIN; + nfs_direct_req_release(dreq); + goto out_release; + } if (user_backed_iter(iter)) dreq->flags = NFS_ODIRECT_SHOULD_DIRTY; if (!swap) { - result = nfs_start_io_direct(inode); + if (iocb->ki_flags & IOCB_NOWAIT) + result = nfs_start_io_direct_nowait(inode); + else + result = nfs_start_io_direct(inode); if (result) { /* release the reference that would usually be * consumed by nfs_direct_read_schedule_iovec() -- cgit v1.2.3