[RFC 17/34] iscsi-target: split iscsit_send_conn_drop_async_message()

[Varun Prakash]

move code to form iscsi_async hdr to new function
iscsit_build_conn_drop_async_pdu(), so that
ISCSI_TCP_CXGB4 and other transport drivers
can reuse this code.

Signed-off-by: Varun Prakash <va...@chelsio.com>
---
 drivers/target/iscsi/iscsi_target.c    | 26 ++++++++++++++++++--------
 include/target/iscsi/iscsi_transport.h |  3 +++
 2 files changed, 21 insertions(+), 8 deletions(-)

diff --git a/drivers/target/iscsi/iscsi_target.c 
b/drivers/target/iscsi/iscsi_target.c
index 6137e26..8bf3cfb 100644
--- a/drivers/target/iscsi/iscsi_target.c
+++ b/drivers/target/iscsi/iscsi_target.c
@@ -2531,16 +2531,11 @@ static void iscsit_build_conn_drop_async_message(struct 
iscsi_conn *conn)
        iscsit_dec_conn_usage_count(conn_p);
 }
 
-static int iscsit_send_conn_drop_async_message(
+void iscsit_build_conn_drop_async_pdu(
        struct iscsi_cmd *cmd,
-       struct iscsi_conn *conn)
+       struct iscsi_conn *conn,
+       struct iscsi_async *hdr)
 {
-       struct iscsi_async *hdr;
-
-       cmd->tx_size = ISCSI_HDR_LEN;
-       cmd->iscsi_opcode = ISCSI_OP_ASYNC_EVENT;
-
-       hdr                     = (struct iscsi_async *) cmd->pdu;
        hdr->opcode             = ISCSI_OP_ASYNC_EVENT;
        hdr->flags              = ISCSI_FLAG_CMD_FINAL;
        cmd->init_task_tag      = RESERVED_ITT;
@@ -2554,6 +2549,21 @@ static int iscsit_send_conn_drop_async_message(
        hdr->param1             = cpu_to_be16(cmd->logout_cid);
        hdr->param2             = 
cpu_to_be16(conn->sess->sess_ops->DefaultTime2Wait);
        hdr->param3             = 
cpu_to_be16(conn->sess->sess_ops->DefaultTime2Retain);
+}
+EXPORT_SYMBOL(iscsit_build_conn_drop_async_pdu);
+
+static int iscsit_send_conn_drop_async_message(
+       struct iscsi_cmd *cmd,
+       struct iscsi_conn *conn)
+{
+       struct iscsi_async *hdr;
+
+       cmd->tx_size = ISCSI_HDR_LEN;
+       cmd->iscsi_opcode = ISCSI_OP_ASYNC_EVENT;
+
+       hdr                     = (struct iscsi_async *)cmd->pdu;
+
+       iscsit_build_conn_drop_async_pdu(cmd, conn, hdr);
 
        if (conn->conn_ops->HeaderDigest) {
                u32 *header_digest = (u32 *)&cmd->pdu[ISCSI_HDR_LEN];
diff --git a/include/target/iscsi/iscsi_transport.h 
b/include/target/iscsi/iscsi_transport.h
index 746404a..a47124b 100644
--- a/include/target/iscsi/iscsi_transport.h
+++ b/include/target/iscsi/iscsi_transport.h
@@ -89,6 +89,9 @@ extern int iscsit_build_r2ts_for_cmd(struct iscsi_conn *, 
struct iscsi_cmd *,
                                     bool);
 extern void iscsit_build_r2t_pdu(struct iscsi_cmd *, struct iscsi_conn *,
                                 struct iscsi_r2t *, struct iscsi_r2t_rsp *);
+extern void iscsit_build_conn_drop_async_pdu(struct iscsi_cmd *,
+                                            struct iscsi_conn *,
+                                            struct iscsi_async *);
 /*
  * From iscsi_target_device.c
  */
-- 
2.0.2

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