From 39a125dfd39308cbae38f8555d3fa2de017511a0 Mon Sep 17 00:00:00 2001 From: Sagi Grimberg Date: Tue, 29 Apr 2014 13:13:47 +0300 Subject: Target/iscsi,iser: Avoid accepting transport connections during stop stage commit 14f4b54fe38f3a8f8392a50b951c8aa43b63687a upstream. When the target is in stop stage, iSER transport initiates RDMA disconnects. The iSER initiator may wish to establish a new connection over the still existing network portal. In this case iSER transport should not accept and resume new RDMA connections. In order to learn that, iscsi_np is added with enabled flag so the iSER transport can check when deciding weather to accept and resume a new connection request. The iscsi_np is enabled after successful transport setup, and disabled before iscsi_np login threads are cleaned up. Signed-off-by: Sagi Grimberg Signed-off-by: Nicholas Bellinger Signed-off-by: Jiri Slaby --- drivers/infiniband/ulp/isert/ib_isert.c | 8 ++++++++ drivers/target/iscsi/iscsi_target_core.h | 1 + drivers/target/iscsi/iscsi_target_login.c | 1 + drivers/target/iscsi/iscsi_target_tpg.c | 1 + 4 files changed, 11 insertions(+) (limited to 'drivers') diff --git a/drivers/infiniband/ulp/isert/ib_isert.c b/drivers/infiniband/ulp/isert/ib_isert.c index 8f23786c74e9..8645d19f7710 100644 --- a/drivers/infiniband/ulp/isert/ib_isert.c +++ b/drivers/infiniband/ulp/isert/ib_isert.c @@ -493,6 +493,14 @@ isert_connect_request(struct rdma_cm_id *cma_id, struct rdma_cm_event *event) struct ib_device *ib_dev = cma_id->device; int ret = 0; + spin_lock_bh(&np->np_thread_lock); + if (!np->enabled) { + spin_unlock_bh(&np->np_thread_lock); + pr_debug("iscsi_np is not enabled, reject connect request\n"); + return rdma_reject(cma_id, NULL, 0); + } + spin_unlock_bh(&np->np_thread_lock); + pr_debug("Entering isert_connect_request cma_id: %p, context: %p\n", cma_id, cma_id->context); diff --git a/drivers/target/iscsi/iscsi_target_core.h b/drivers/target/iscsi/iscsi_target_core.h index 9a5721b8ff96..e2e1e63237d9 100644 --- a/drivers/target/iscsi/iscsi_target_core.h +++ b/drivers/target/iscsi/iscsi_target_core.h @@ -777,6 +777,7 @@ struct iscsi_np { int np_ip_proto; int np_sock_type; enum np_thread_state_table np_thread_state; + bool enabled; enum iscsi_timer_flags_table np_login_timer_flags; u32 np_exports; enum np_flags_table np_flags; diff --git a/drivers/target/iscsi/iscsi_target_login.c b/drivers/target/iscsi/iscsi_target_login.c index f442a9c93403..f140a0eac985 100644 --- a/drivers/target/iscsi/iscsi_target_login.c +++ b/drivers/target/iscsi/iscsi_target_login.c @@ -983,6 +983,7 @@ int iscsi_target_setup_login_socket( } np->np_transport = t; + np->enabled = true; return 0; } diff --git a/drivers/target/iscsi/iscsi_target_tpg.c b/drivers/target/iscsi/iscsi_target_tpg.c index 3cf77c0b76b4..adc9393f79e5 100644 --- a/drivers/target/iscsi/iscsi_target_tpg.c +++ b/drivers/target/iscsi/iscsi_target_tpg.c @@ -184,6 +184,7 @@ static void iscsit_clear_tpg_np_login_thread( return; } + tpg_np->tpg_np->enabled = false; iscsit_reset_np_thread(tpg_np->tpg_np, tpg_np, tpg, shutdown); } -- cgit v1.2.3