Ack On Wed, May 28, 2025 at 11:11 AM Liu Kui <kui....@virtuozzo.com> wrote: > > We encountered a very strange problem that krpc returns a response > msg without error, however the userspace still sees the original > request msg header in the tx buf instead of the response msg header. > We don't know how it happened, as there's no info from kernel. So > here we try to catch such event by printing a warn message only, > letting userpsace handle such exception. > > Related to #VSTOR-107235 > https://virtuozzo.atlassian.net/browse/VSTOR-107235 > > Signed-off-by: Liu Kui <kui....@virtuozzo.com> > --- > fs/fuse/kio/pcs/pcs_krpc.c | 7 +++++++ > 1 file changed, 7 insertions(+) > > diff --git a/fs/fuse/kio/pcs/pcs_krpc.c b/fs/fuse/kio/pcs/pcs_krpc.c > index 0b47afb9bb01..e8c924c1a5da 100644 > --- a/fs/fuse/kio/pcs/pcs_krpc.c > +++ b/fs/fuse/kio/pcs/pcs_krpc.c > @@ -85,10 +85,17 @@ static void krpc_req_complete(struct krpc_req *kreq, int > error) > { > struct krpc_completion *comp = &kreq->completion; > struct pcs_krpc *krpc = kreq->krpc; > + struct pcs_rpc_hdr *h = (struct pcs_rpc_hdr *)kreq->hdr_buf; > > BUG_ON(!comp->xid); > > comp->result = error; > + if (!comp->result && !(RPC_IS_RESPONSE(h->type))) { > + /* > + * This should never happen, catch the event if it happens. > + */ > + WARN_ON_ONCE(1); > + } > > kreq_release_data_chunks(kreq); > if (kreq->hdr_chunk.mr) > -- > 2.39.5 (Apple Git-154)
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