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) _______________________________________________ Devel mailing list Devel@openvz.org https://lists.openvz.org/mailman/listinfo/devel
