RDMA/rtrs-clt: Print more info when an error happens

Client prints only error value and it is not enough for debugging.

1. When client receives an error from server: the client does not only
   print the error value but also more information of server connection.

2. When client failes to send IO: the client gets an error from RDMA
   layer. It also print more information of server connection.

Link: https://lore.kernel.org/r/20210406123639.202899-2-gi-oh.kim@ionos.com
Signed-off-by: Gioh Kim <gi-oh.kim@ionos.com>
Signed-off-by: Jack Wang <jinpu.wang@ionos.com>
Signed-off-by: Jason Gunthorpe <jgg@nvidia.com>

diff --git a/drivers/infiniband/ulp/rtrs/rtrs-clt.c b/drivers/infiniband/ulp/rtrs/rtrs-clt.c
index 8139c79..dc2f73a 100644 (file)
--- a/drivers/infiniband/ulp/rtrs/rtrs-clt.c
+++ b/drivers/infiniband/ulp/rtrs/rtrs-clt.c
@@ -437,6 +437,13 @@ static void complete_rdma_req(struct rtrs_clt_io_req *req, int errno,
        req->in_use = false;
        req->con = NULL;
 
+       if (errno) {
+               rtrs_err_rl(con->c.sess,
+                           "IO request failed: error=%d path=%s [%s:%u]\n",
+                           errno, kobject_name(&sess->kobj), sess->hca_name,
+                           sess->hca_port);
+       }
+
        if (notify)
                req->conf(req->priv, errno);
 }
@@ -1075,7 +1082,10 @@ static int rtrs_clt_write_req(struct rtrs_clt_io_req *req)
                                       req->usr_len + sizeof(*msg),
                                       imm);
        if (unlikely(ret)) {
-               rtrs_err(s, "Write request failed: %d\n", ret);
+               rtrs_err_rl(s,
+                           "Write request failed: error=%d path=%s [%s:%u]\n",
+                           ret, kobject_name(&sess->kobj), sess->hca_name,
+                           sess->hca_port);
                if (sess->clt->mp_policy == MP_POLICY_MIN_INFLIGHT)
                        atomic_dec(&sess->stats->inflight);
                if (req->sg_cnt)
@@ -1193,7 +1203,10 @@ static int rtrs_clt_read_req(struct rtrs_clt_io_req *req)
        ret = rtrs_post_send_rdma(req->con, req, &sess->rbufs[buf_id],
                                   req->data_len, imm, wr);
        if (unlikely(ret)) {
-               rtrs_err(s, "Read request failed: %d\n", ret);
+               rtrs_err_rl(s,
+                           "Read request failed: error=%d path=%s [%s:%u]\n",
+                           ret, kobject_name(&sess->kobj), sess->hca_name,
+                           sess->hca_port);
                if (sess->clt->mp_policy == MP_POLICY_MIN_INFLIGHT)
                        atomic_dec(&sess->stats->inflight);
                req->need_inv = false;
@@ -2513,12 +2526,33 @@ static int init_sess(struct rtrs_clt_sess *sess)
        mutex_lock(&sess->init_mutex);
        err = init_conns(sess);
        if (err) {
-               rtrs_err(sess->clt, "init_conns(), err: %d\n", err);
+               char str[NAME_MAX];
+               int err;
+               struct rtrs_addr path = {
+                       .src = &sess->s.src_addr,
+                       .dst = &sess->s.dst_addr,
+               };
+
+               rtrs_addr_to_str(&path, str, sizeof(str));
+               rtrs_err(sess->clt,
+                        "init_conns() failed: err=%d path=%s [%s:%u]\n", err,
+                        str, sess->hca_name, sess->hca_port);
                goto out;
        }
        err = rtrs_send_sess_info(sess);
        if (err) {
-               rtrs_err(sess->clt, "rtrs_send_sess_info(), err: %d\n", err);
+               char str[NAME_MAX];
+               int err;
+               struct rtrs_addr path = {
+                       .src = &sess->s.src_addr,
+                       .dst = &sess->s.dst_addr,
+               };
+
+               rtrs_addr_to_str(&path, str, sizeof(str));
+               rtrs_err(
+                       sess->clt,
+                       "rtrs_send_sess_info() failed: err=%d path=%s [%s:%u]\n",
+                       err, str, sess->hca_name, sess->hca_port);
                goto out;
        }
        rtrs_clt_sess_up(sess);