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| author | Md Haris Iqbal <haris.iqbal@cloud.ionos.com> | 2021-05-28 13:30:17 +0200 |
|---|---|---|
| committer | Jason Gunthorpe <jgg@nvidia.com> | 2021-05-28 20:52:59 -0300 |
| commit | 5b73b799c25c68a4703cd6c5ac4518006d9865b8 (patch) | |
| tree | bb96c691c9820849ecad183ce5f05d782a6ed61e /drivers/infiniband/ulp | |
| parent | 6bb97a2c1aa5278a30d49abb6186d50c34c207e2 (diff) | |
| download | linux-next-5b73b799c25c68a4703cd6c5ac4518006d9865b8.tar.gz | |
RDMA/rtrs-clt: Check if the queue_depth has changed during a reconnection
The queue_depth is a module parameter for rtrs_server. It is used on the
client side to determing the queue_depth of the request queue for the RNBD
virtual block device.
During a reconnection event for an already mapped device, in case the
rtrs_server module queue_depth has changed, fail the reconnect attempt.
Also stop further auto reconnection attempts. A manual reconnect via
sysfs has to be triggerred.
Fixes: 6a98d71daea18 ("RDMA/rtrs: client: main functionality")
Link: https://lore.kernel.org/r/20210528113018.52290-20-jinpu.wang@ionos.com
Signed-off-by: Md Haris Iqbal <haris.iqbal@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>
Diffstat (limited to 'drivers/infiniband/ulp')
| -rw-r--r-- | drivers/infiniband/ulp/rtrs/rtrs-clt.c | 19 |
1 files changed, 15 insertions, 4 deletions
diff --git a/drivers/infiniband/ulp/rtrs/rtrs-clt.c b/drivers/infiniband/ulp/rtrs/rtrs-clt.c index 88a1c93f244a..e4a23c40d4c7 100644 --- a/drivers/infiniband/ulp/rtrs/rtrs-clt.c +++ b/drivers/infiniband/ulp/rtrs/rtrs-clt.c @@ -1780,7 +1780,19 @@ static int rtrs_rdma_conn_established(struct rtrs_clt_con *con, queue_depth); return -ECONNRESET; } - if (!sess->rbufs || sess->queue_depth < queue_depth) { + if (sess->queue_depth > 0 && queue_depth != sess->queue_depth) { + rtrs_err(clt, "Error: queue depth changed\n"); + + /* + * Stop any more reconnection attempts + */ + sess->reconnect_attempts = -1; + rtrs_err(clt, + "Disabling auto-reconnect. Trigger a manual reconnect after issue is resolved\n"); + return -ECONNRESET; + } + + if (!sess->rbufs) { kfree(sess->rbufs); sess->rbufs = kcalloc(queue_depth, sizeof(*sess->rbufs), GFP_KERNEL); @@ -1794,7 +1806,7 @@ static int rtrs_rdma_conn_established(struct rtrs_clt_con *con, sess->chunk_size = sess->max_io_size + sess->max_hdr_size; /* - * Global queue depth and IO size is always a minimum. + * Global IO size is always a minimum. * If while a reconnection server sends us a value a bit * higher - client does not care and uses cached minimum. * @@ -1802,8 +1814,7 @@ static int rtrs_rdma_conn_established(struct rtrs_clt_con *con, * connections in parallel, use lock. */ mutex_lock(&clt->paths_mutex); - clt->queue_depth = min_not_zero(sess->queue_depth, - clt->queue_depth); + clt->queue_depth = sess->queue_depth; clt->max_io_size = min_not_zero(sess->max_io_size, clt->max_io_size); mutex_unlock(&clt->paths_mutex); |