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authorVarun Prakash <varun@chelsio.com>2017-10-04 22:03:35 +0530
committerNicholas Bellinger <nab@linux-iscsi.org>2017-11-04 14:54:40 -0700
commit1ae01724ae92004be36a6c11c4d5a9f94e915204 (patch)
treeed241c8c2f26c6dbc38b8292f50e2b4423e0a6fd /drivers/target
parenttarget: Add netlink command reply supported option for each device (diff)
downloadlinux-dev-1ae01724ae92004be36a6c11c4d5a9f94e915204.tar.xz
linux-dev-1ae01724ae92004be36a6c11c4d5a9f94e915204.zip
cxgbit: Abort the TCP connection in case of data out timeout
If DDP is programmed for a WRITE cmd and data out timer gets expired then abort the TCP connection before freeing the cmd to avoid any possibility of DDP after freeing the cmd. Signed-off-by: Varun Prakash <varun@chelsio.com> Signed-off-by: Nicholas Bellinger <nab@linux-iscsi.org>
Diffstat (limited to 'drivers/target')
-rw-r--r--drivers/target/iscsi/cxgbit/cxgbit.h2
-rw-r--r--drivers/target/iscsi/cxgbit/cxgbit_cm.c45
-rw-r--r--drivers/target/iscsi/cxgbit/cxgbit_ddp.c8
3 files changed, 55 insertions, 0 deletions
diff --git a/drivers/target/iscsi/cxgbit/cxgbit.h b/drivers/target/iscsi/cxgbit/cxgbit.h
index 90388698c222..417b9e66b0cd 100644
--- a/drivers/target/iscsi/cxgbit/cxgbit.h
+++ b/drivers/target/iscsi/cxgbit/cxgbit.h
@@ -165,6 +165,7 @@ enum cxgbit_csk_flags {
CSK_LOGIN_PDU_DONE,
CSK_LOGIN_DONE,
CSK_DDP_ENABLE,
+ CSK_ABORT_RPL_WAIT,
};
struct cxgbit_sock_common {
@@ -321,6 +322,7 @@ int cxgbit_setup_np(struct iscsi_np *, struct sockaddr_storage *);
int cxgbit_setup_conn_digest(struct cxgbit_sock *);
int cxgbit_accept_np(struct iscsi_np *, struct iscsi_conn *);
void cxgbit_free_np(struct iscsi_np *);
+void cxgbit_abort_conn(struct cxgbit_sock *csk);
void cxgbit_free_conn(struct iscsi_conn *);
extern cxgbit_cplhandler_func cxgbit_cplhandlers[NUM_CPL_CMDS];
int cxgbit_get_login_rx(struct iscsi_conn *, struct iscsi_login *);
diff --git a/drivers/target/iscsi/cxgbit/cxgbit_cm.c b/drivers/target/iscsi/cxgbit/cxgbit_cm.c
index d4fa41be80f9..92eb57e2adaf 100644
--- a/drivers/target/iscsi/cxgbit/cxgbit_cm.c
+++ b/drivers/target/iscsi/cxgbit/cxgbit_cm.c
@@ -665,6 +665,46 @@ static int cxgbit_send_abort_req(struct cxgbit_sock *csk)
return cxgbit_l2t_send(csk->com.cdev, skb, csk->l2t);
}
+static void
+__cxgbit_abort_conn(struct cxgbit_sock *csk, struct sk_buff *skb)
+{
+ __kfree_skb(skb);
+
+ if (csk->com.state != CSK_STATE_ESTABLISHED)
+ goto no_abort;
+
+ set_bit(CSK_ABORT_RPL_WAIT, &csk->com.flags);
+ csk->com.state = CSK_STATE_ABORTING;
+
+ cxgbit_send_abort_req(csk);
+
+ return;
+
+no_abort:
+ cxgbit_wake_up(&csk->com.wr_wait, __func__, CPL_ERR_NONE);
+ cxgbit_put_csk(csk);
+}
+
+void cxgbit_abort_conn(struct cxgbit_sock *csk)
+{
+ struct sk_buff *skb = alloc_skb(0, GFP_KERNEL | __GFP_NOFAIL);
+
+ cxgbit_get_csk(csk);
+ cxgbit_init_wr_wait(&csk->com.wr_wait);
+
+ spin_lock_bh(&csk->lock);
+ if (csk->lock_owner) {
+ cxgbit_skcb_rx_backlog_fn(skb) = __cxgbit_abort_conn;
+ __skb_queue_tail(&csk->backlogq, skb);
+ } else {
+ __cxgbit_abort_conn(csk, skb);
+ }
+ spin_unlock_bh(&csk->lock);
+
+ cxgbit_wait_for_reply(csk->com.cdev, &csk->com.wr_wait,
+ csk->tid, 600, __func__);
+}
+
void cxgbit_free_conn(struct iscsi_conn *conn)
{
struct cxgbit_sock *csk = conn->context;
@@ -1709,12 +1749,17 @@ rel_skb:
static void cxgbit_abort_rpl_rss(struct cxgbit_sock *csk, struct sk_buff *skb)
{
+ struct cpl_abort_rpl_rss *rpl = cplhdr(skb);
+
pr_debug("%s: csk %p; tid %u; state %d\n",
__func__, csk, csk->tid, csk->com.state);
switch (csk->com.state) {
case CSK_STATE_ABORTING:
csk->com.state = CSK_STATE_DEAD;
+ if (test_bit(CSK_ABORT_RPL_WAIT, &csk->com.flags))
+ cxgbit_wake_up(&csk->com.wr_wait, __func__,
+ rpl->status);
cxgbit_put_csk(csk);
break;
default:
diff --git a/drivers/target/iscsi/cxgbit/cxgbit_ddp.c b/drivers/target/iscsi/cxgbit/cxgbit_ddp.c
index 5fdb57cac968..768cce0ccb80 100644
--- a/drivers/target/iscsi/cxgbit/cxgbit_ddp.c
+++ b/drivers/target/iscsi/cxgbit/cxgbit_ddp.c
@@ -275,6 +275,14 @@ void cxgbit_release_cmd(struct iscsi_conn *conn, struct iscsi_cmd *cmd)
struct cxgbit_device *cdev = csk->com.cdev;
struct cxgbi_ppm *ppm = cdev2ppm(cdev);
+ /* Abort the TCP conn if DDP is not complete to
+ * avoid any possibility of DDP after freeing
+ * the cmd.
+ */
+ if (unlikely(cmd->write_data_done !=
+ cmd->se_cmd.data_length))
+ cxgbit_abort_conn(csk);
+
cxgbi_ppm_ppod_release(ppm, ttinfo->idx);
dma_unmap_sg(&ppm->pdev->dev, ttinfo->sgl,