Actually CCing Dai Ngo...
On 07/07/2024 1:42, Sagi Grimberg wrote:
Many applications open files with O_WRONLY, fully intending to write
into the opened file. There is no reason why these applications should
not enjoy a write delegation handed to them.
Cc: Dai Ngo <dai.ngo@xxxxxxxxxx>
Signed-off-by: Sagi Grimberg <sagi@xxxxxxxxxxx>
---
Note: I couldn't find any reason to why the initial implementation chose
to offer write delegations only to NFS4_SHARE_ACCESS_BOTH, but it seemed
like an oversight to me. So I figured why not just send it out and see who
objects...
fs/nfsd/nfs4state.c | 10 +++++-----
1 file changed, 5 insertions(+), 5 deletions(-)
diff --git a/fs/nfsd/nfs4state.c b/fs/nfsd/nfs4state.c
index a20c2c9d7d45..69d576b19eb6 100644
--- a/fs/nfsd/nfs4state.c
+++ b/fs/nfsd/nfs4state.c
@@ -5784,15 +5784,15 @@ nfs4_set_delegation(struct nfsd4_open *open, struct nfs4_ol_stateid *stp,
* "An OPEN_DELEGATE_WRITE delegation allows the client to handle,
* on its own, all opens."
*
- * Furthermore the client can use a write delegation for most READ
- * operations as well, so we require a O_RDWR file here.
- *
- * Offer a write delegation in the case of a BOTH open, and ensure
- * we get the O_RDWR descriptor.
+ * Offer a write delegation in the case of a BOTH open (ensure
+ * a O_RDWR descriptor) Or WRONLY open (with a O_WRONLY descriptor).
*/
if ((open->op_share_access & NFS4_SHARE_ACCESS_BOTH) == NFS4_SHARE_ACCESS_BOTH) {
nf = find_rw_file(fp);
dl_type = NFS4_OPEN_DELEGATE_WRITE;
+ } else if (open->op_share_access & NFS4_SHARE_ACCESS_WRITE) {
+ nf = find_writeable_file(fp);
+ dl_type = NFS4_OPEN_DELEGATE_WRITE;
}
/*
