When a transport (e.g. iscsi_tcp, ib_iser) is unloaded, a notification
must be sent to userspace. This will allow the userspace code to release
all transport related resources.
Signed-off-by: Erez Zilber <[EMAIL PROTECTED]>
---
drivers/scsi/scsi_transport_iscsi.c | 30 ++++++++++++++++++++++++++++++
include/scsi/iscsi_if.h | 7 ++++---
2 files changed, 34 insertions(+), 3 deletions(-)
diff --git a/drivers/scsi/scsi_transport_iscsi.c
b/drivers/scsi/scsi_transport_iscsi.c
index cbd2b71..706c9b9 100644
--- a/drivers/scsi/scsi_transport_iscsi.c
+++ b/drivers/scsi/scsi_transport_iscsi.c
@@ -1710,6 +1710,34 @@ free_priv:
}
EXPORT_SYMBOL_GPL(iscsi_register_transport);
+void iscsi_trans_error(struct iscsi_transport *tt)
+{
+ struct nlmsghdr *nlh;
+ struct sk_buff *skb;
+ struct iscsi_uevent *ev;
+ int len = NLMSG_SPACE(sizeof(*ev));
+ struct iscsi_internal *priv;
+
+ priv = iscsi_if_transport_lookup(tt);
+ if (!priv)
+ return;
+
+ skb = alloc_skb(len, GFP_ATOMIC);
+ if (!skb) {
+ printk(KERN_ERR "iscsi: gracefully ignored transport error\n");
+ return;
+ }
+
+ nlh = __nlmsg_put(skb, priv->daemon_pid, 0, 0, (len - sizeof(*nlh)), 0);
+ ev = NLMSG_DATA(nlh);
+ ev->transport_handle = iscsi_handle(tt);
+ ev->type = ISCSI_KEVENT_TRANS_ERROR;
+
+ iscsi_broadcast_skb(skb, GFP_ATOMIC);
+
+ printk(KERN_INFO "iscsi: detected transport error\n");
+}
+
int iscsi_unregister_transport(struct iscsi_transport *tt)
{
struct iscsi_internal *priv;
@@ -1719,6 +1747,8 @@ int iscsi_unregister_transport(struct iscsi_transport *tt)
mutex_lock(&rx_queue_mutex);
+ iscsi_trans_error(tt);
+
priv = iscsi_if_transport_lookup(tt);
BUG_ON (!priv);
diff --git a/include/scsi/iscsi_if.h b/include/scsi/iscsi_if.h
index 801a677..027eb96 100644
--- a/include/scsi/iscsi_if.h
+++ b/include/scsi/iscsi_if.h
@@ -56,9 +56,10 @@ enum iscsi_uevent_e {
ISCSI_KEVENT_RECV_PDU = KEVENT_BASE + 1,
ISCSI_KEVENT_CONN_ERROR = KEVENT_BASE + 2,
ISCSI_KEVENT_IF_ERROR = KEVENT_BASE + 3,
- ISCSI_KEVENT_DESTROY_SESSION = KEVENT_BASE + 4,
- ISCSI_KEVENT_UNBIND_SESSION = KEVENT_BASE + 5,
- ISCSI_KEVENT_CREATE_SESSION = KEVENT_BASE + 6,
+ ISCSI_KEVENT_TRANS_ERROR = KEVENT_BASE + 4,
+ ISCSI_KEVENT_DESTROY_SESSION = KEVENT_BASE + 5,
+ ISCSI_KEVENT_UNBIND_SESSION = KEVENT_BASE + 6,
+ ISCSI_KEVENT_CREATE_SESSION = KEVENT_BASE + 7,
};
enum iscsi_tgt_dscvr {
--
1.5.4.4
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