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RDMA/rtrs-srv: Check return values while processing info request

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While processing info request, it could so happen that the srv_path goes
to CLOSING state, cause of any of the error events from RDMA. That state
change should be picked up while trying to change the state in
process_info_req, by checking the return value. In case the state change
call in process_info_req fails, we fail the processing.

We should also check the return value for rtrs_srv_path_up, since it
sends a link event to the client above, and the client can fail for any
reason.

Fixes: 9cb8374804 ("RDMA/rtrs: server: main functionality")
Signed-off-by: Md Haris Iqbal <haris.iqbal@ionos.com>
Signed-off-by: Jack Wang <jinpu.wang@ionos.com>
Signed-off-by: Grzegorz Prajsner <grzegorz.prajsner@ionos.com>
Link: https://lore.kernel.org/r/20231120154146.920486-4-haris.iqbal@ionos.com
Signed-off-by: Leon Romanovsky <leon@kernel.org>
This commit is contained in:
Md Haris Iqbal 2023-11-20 16:41:40 +01:00 committed by Leon Romanovsky
parent 3e44a61b5d
commit ed1e52aefa
1 changed files with 18 additions and 6 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

22
drivers/infiniband/ulp/rtrs/rtrs-srv.c
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@ -710,20 +710,23 @@ static void rtrs_srv_info_rsp_done(struct ib_cq *cq, struct ib_wc *wc)
WARN_ON(wc->opcode != IB_WC_SEND);
}
static void rtrs_srv_path_up(struct rtrs_srv_path *srv_path)
static int rtrs_srv_path_up(struct rtrs_srv_path *srv_path)
{
struct rtrs_srv_sess *srv = srv_path->srv;
struct rtrs_srv_ctx *ctx = srv->ctx;
int up;
int up, ret = 0;
mutex_lock(&srv->paths_ev_mutex);
up = ++srv->paths_up;
if (up == 1)
ctx->ops.link_ev(srv, RTRS_SRV_LINK_EV_CONNECTED, NULL);
ret = ctx->ops.link_ev(srv, RTRS_SRV_LINK_EV_CONNECTED, NULL);
mutex_unlock(&srv->paths_ev_mutex);
/* Mark session as established */
if (!ret)
srv_path->established = true;
return ret;
}
static void rtrs_srv_path_down(struct rtrs_srv_path *srv_path)
@ -852,7 +855,12 @@ static int process_info_req(struct rtrs_srv_con *con,
goto iu_free;
kobject_get(&srv_path->kobj);
get_device(&srv_path->srv->dev);
rtrs_srv_change_state(srv_path, RTRS_SRV_CONNECTED);
err = rtrs_srv_change_state(srv_path, RTRS_SRV_CONNECTED);
if (!err) {
rtrs_err(s, "rtrs_srv_change_state(), err: %d\n", err);
goto iu_free;
}
rtrs_srv_start_hb(srv_path);
/*
@ -861,7 +869,11 @@ static int process_info_req(struct rtrs_srv_con *con,
* all connections are successfully established. Thus, simply notify
* listener with a proper event if we are the first path.
*/
rtrs_srv_path_up(srv_path);
err = rtrs_srv_path_up(srv_path);
if (err) {
rtrs_err(s, "rtrs_srv_path_up(), err: %d\n", err);
goto iu_free;
}
ib_dma_sync_single_for_device(srv_path->s.dev->ib_dev,
tx_iu->dma_addr,