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authorSagi Grimberg <sagig@mellanox.com>2014-04-29 13:13:47 +0300
committerNicholas Bellinger <nab@linux-iscsi.org>2014-05-15 17:09:11 -0700
commit14f4b54fe38f3a8f8392a50b951c8aa43b63687a (patch)
tree7aa8efa8e5b927d58803bf896843388320666c1c
parent531b7bf4bd795d9a09eac92504322a472c010bc8 (diff)
downloadlinux-14f4b54fe38f3a8f8392a50b951c8aa43b63687a.tar.gz
Target/iscsi,iser: Avoid accepting transport connections during stop stage
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 <sagig@mellanox.com> Cc: stable@vger.kernel.org # 3.10+ Signed-off-by: Nicholas Bellinger <nab@linux-iscsi.org>
-rw-r--r--drivers/infiniband/ulp/isert/ib_isert.c11
-rw-r--r--drivers/target/iscsi/iscsi_target_core.h1
-rw-r--r--drivers/target/iscsi/iscsi_target_login.c1
-rw-r--r--drivers/target/iscsi/iscsi_target_tpg.c1
4 files changed, 13 insertions, 1 deletions
diff --git a/drivers/infiniband/ulp/isert/ib_isert.c b/drivers/infiniband/ulp/isert/ib_isert.c
index 826eaf5741f6..a1710465faaf 100644
--- a/drivers/infiniband/ulp/isert/ib_isert.c
+++ b/drivers/infiniband/ulp/isert/ib_isert.c
@@ -562,7 +562,15 @@ isert_connect_request(struct rdma_cm_id *cma_id, struct rdma_cm_event *event)
struct isert_device *device;
struct ib_device *ib_dev = cma_id->device;
int ret = 0;
- u8 pi_support = np->tpg_np->tpg->tpg_attrib.t10_pi;
+ u8 pi_support;
+
+ 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);
@@ -653,6 +661,7 @@ isert_connect_request(struct rdma_cm_id *cma_id, struct rdma_cm_event *event)
goto out_mr;
}
+ pi_support = np->tpg_np->tpg->tpg_attrib.t10_pi;
if (pi_support && !device->pi_capable) {
pr_err("Protection information requested but not supported\n");
ret = -EINVAL;
diff --git a/drivers/target/iscsi/iscsi_target_core.h b/drivers/target/iscsi/iscsi_target_core.h
index 6960f22909ae..302eb3b78715 100644
--- a/drivers/target/iscsi/iscsi_target_core.h
+++ b/drivers/target/iscsi/iscsi_target_core.h
@@ -775,6 +775,7 @@ 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 8739b98f6f93..b72d8550e8bc 100644
--- a/drivers/target/iscsi/iscsi_target_login.c
+++ b/drivers/target/iscsi/iscsi_target_login.c
@@ -984,6 +984,7 @@ 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 eb96b20dc09e..ca1811858afd 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);
}