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authorMd Haris Iqbal <haris.iqbal@ionos.com>2023-11-20 16:41:42 +0100
committerLeon Romanovsky <leon@kernel.org>2023-11-22 13:40:55 +0200
commitc4d32e77fc1006f99eeb78417efc3d81a384072a (patch)
treef551284c2557236eabf3b387343c69a853734ad9 /drivers/infiniband/ulp
parent3a71cd6ca0ce33d1af019ecf1d7167406fa54400 (diff)
RDMA/rtrs-srv: Destroy path files after making sure no IOs in-flight
Destroying path files may lead to the freeing of rdma_stats. This creates the following race. An IO is in-flight, or has just passed the session state check in process_read/process_write. The close_work gets triggered and the function rtrs_srv_close_work() starts and does destroy path which frees the rdma_stats. After this the function process_read/process_write resumes and tries to update the stats through the function rtrs_srv_update_rdma_stats This commit solves the problem by moving the destroy path function to a later point. This point makes sure any inflights are completed. This is done by qp drain, and waiting for all in-flights through ops_id. Fixes: 9cb837480424 ("RDMA/rtrs: server: main functionality") Signed-off-by: Md Haris Iqbal <haris.iqbal@ionos.com> Signed-off-by: Santosh Kumar Pradhan <santosh.pradhan@ionos.com> Signed-off-by: Grzegorz Prajsner <grzegorz.prajsner@ionos.com> Link: https://lore.kernel.org/r/20231120154146.920486-6-haris.iqbal@ionos.com Signed-off-by: Leon Romanovsky <leon@kernel.org>
Diffstat (limited to 'drivers/infiniband/ulp')
-rw-r--r--drivers/infiniband/ulp/rtrs/rtrs-srv.c3
1 files changed, 2 insertions, 1 deletions
diff --git a/drivers/infiniband/ulp/rtrs/rtrs-srv.c b/drivers/infiniband/ulp/rtrs/rtrs-srv.c
index 925b71481c62..1d33efb8fb03 100644
--- a/drivers/infiniband/ulp/rtrs/rtrs-srv.c
+++ b/drivers/infiniband/ulp/rtrs/rtrs-srv.c
@@ -1532,7 +1532,6 @@ static void rtrs_srv_close_work(struct work_struct *work)
srv_path = container_of(work, typeof(*srv_path), close_work);
- rtrs_srv_destroy_path_files(srv_path);
rtrs_srv_stop_hb(srv_path);
for (i = 0; i < srv_path->s.con_num; i++) {
@@ -1552,6 +1551,8 @@ static void rtrs_srv_close_work(struct work_struct *work)
/* Wait for all completion */
wait_for_completion(&srv_path->complete_done);
+ rtrs_srv_destroy_path_files(srv_path);
+
/* Notify upper layer if we are the last path */
rtrs_srv_path_down(srv_path);