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[SCSI] libiscsi, iser, tcp: remove recv_lock

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The recv lock was defined so the iscsi layer could block
the recv path from processing IO during recovery. It
turns out iser just set a lock to that pointer which was pointless.

We now disconnect the transport connection before doing recovery
so we do not need the recv lock. For iscsi_tcp we still stop
the recv path incase older tools are being used.

This patch also has iscsi_itt_to_ctask user grab the session lock
and has the caller access the task with the lock or get a ref
to it in case the target is broken and sends a tmf success response
then sends data or a response for the command that was supposed to
be affected bty the tmf.

Signed-off-by: Mike Christie <michaelc@cs.wisc.edu>
Signed-off-by: James Bottomley <James.Bottomley@HansenPartnership.com>
This commit is contained in:
Mike Christie
2008-05-21 15:54:18 -05:00
committed by James Bottomley
parent 3cf7b233ff
commit 913e5bf435
6 changed files with 144 additions and 117 deletions
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20
drivers/infiniband/ulp/iser/iscsi_iser.c
View File

@ -281,9 +281,6 @@ iscsi_iser_conn_create(struct iscsi_cls_session *cls_session, uint32_t conn_idx)
conn->max_recv_dlength = 128;
iser_conn = conn->dd_data;
/* currently this is the only field which need to be initiated */
rwlock_init(&iser_conn->lock);
conn->dd_data = iser_conn;
iser_conn->iscsi_conn = conn;
@ -342,9 +339,6 @@ iscsi_iser_conn_bind(struct iscsi_cls_session *cls_session,
ib_conn->iser_conn = iser_conn;
iser_conn->ib_conn = ib_conn;
iser_conn_get(ib_conn);
conn->recv_lock = &iser_conn->lock;
return 0;
}
@ -355,12 +349,18 @@ iscsi_iser_conn_stop(struct iscsi_cls_conn *cls_conn, int flag)
struct iscsi_iser_conn *iser_conn = conn->dd_data;
struct iser_conn *ib_conn = iser_conn->ib_conn;
iscsi_conn_stop(cls_conn, flag);
/*
* There is no unbind event so the stop callback
* must release the ref from the bind.
* Userspace may have goofed up and not bound the connection or
* might have only partially setup the connection.
*/
iser_conn_put(ib_conn);
if (ib_conn) {
iscsi_conn_stop(cls_conn, flag);
/*
* There is no unbind event so the stop callback
* must release the ref from the bind.
*/
iser_conn_put(ib_conn);
}
iser_conn->ib_conn = NULL;
}

2
drivers/infiniband/ulp/iser/iscsi_iser.h
View File

@ -263,8 +263,6 @@ struct iser_conn {
struct iscsi_iser_conn {
struct iscsi_conn *iscsi_conn;/* ptr to iscsi conn */
struct iser_conn *ib_conn; /* iSER IB conn */
rwlock_t lock;
};
struct iscsi_iser_task {

6
drivers/infiniband/ulp/iser/iser_initiator.c
View File

@ -558,7 +558,12 @@ void iser_rcv_completion(struct iser_desc *rx_desc,
opcode = hdr->opcode & ISCSI_OPCODE_MASK;
if (opcode == ISCSI_OP_SCSI_CMD_RSP) {
spin_lock(&conn->iscsi_conn->session->lock);
task = iscsi_itt_to_ctask(conn->iscsi_conn, hdr->itt);
if (task)
__iscsi_get_task(task);
spin_unlock(&conn->iscsi_conn->session->lock);
if (!task)
iser_err("itt can't be matched to task!!! "
"conn %p opcode %d itt %d\n",
@ -568,6 +573,7 @@ void iser_rcv_completion(struct iser_desc *rx_desc,
iser_dbg("itt %d task %p\n",hdr->itt, task);
iser_task->status = ISER_TASK_STATUS_COMPLETED;
iser_task_rdma_finalize(iser_task);
iscsi_put_task(task);
}
}
iser_dto_buffs_release(dto);