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Add ability to shut down iSCSI connection

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This commit is contained in:
Michael Brown
2006-12-21 17:17:47 +00:00
parent 7ce3df65c2
commit ab242a760d
4 changed files with 49 additions and 24 deletions
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47
src/net/tcp/iscsi.c
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@@ -104,24 +104,6 @@ static void iscsi_done ( struct iscsi_session *iscsi, int rc ) {
async_done ( &iscsi->aop, rc );
}
/**
* Mark iSCSI operation as complete, and close TCP connection
*
* @v iscsi iSCSI session
* @v rc Return status code
*/
static void iscsi_close ( struct iscsi_session *iscsi, int rc ) {
/* Clear session status */
iscsi->status = 0;
/* Close TCP connection */
tcp_close ( &iscsi->tcp );
/* Mark iSCSI operation as complete */
iscsi_done ( iscsi, rc );
}
/****************************************************************************
*
* iSCSI SCSI command issuing
@@ -564,7 +546,7 @@ static void iscsi_handle_chap_a_value ( struct iscsi_session *iscsi,
/* Prepare for CHAP with MD5 */
if ( ( rc = chap_init ( &iscsi->chap, &md5_algorithm ) ) != 0 ) {
DBG ( "iSCSI %p could not initialise CHAP\n", iscsi );
iscsi_close ( iscsi, rc );
iscsi_done ( iscsi, rc );
}
}
@@ -722,7 +704,7 @@ static void iscsi_rx_login_response ( struct iscsi_session *iscsi, void *data,
/* Buffer up the PDU data */
if ( ( rc = iscsi_rx_buffered_data ( iscsi, data, len ) ) != 0 ) {
DBG ( "iSCSI %p could not buffer login response\n", iscsi );
iscsi_close ( iscsi, rc );
iscsi_done ( iscsi, rc );
return;
}
if ( remaining )
@@ -747,7 +729,7 @@ static void iscsi_rx_login_response ( struct iscsi_session *iscsi, void *data,
if ( response->status_class != 0 ) {
printf ( "iSCSI login failure: class %02x detail %02x\n",
response->status_class, response->status_detail );
iscsi_close ( iscsi, -EPERM );
iscsi_done ( iscsi, -EPERM );
return;
}
@@ -765,7 +747,7 @@ static void iscsi_rx_login_response ( struct iscsi_session *iscsi, void *data,
default:
DBG ( "iSCSI %p got invalid response flags %02x\n",
iscsi, response->flags );
iscsi_close ( iscsi, -EIO );
iscsi_done ( iscsi, -EIO );
return;
}
}
@@ -1122,10 +1104,17 @@ static void iscsi_newdata ( struct tcp_connection *conn, void *data,
*/
static void iscsi_closed ( struct tcp_connection *conn, int status ) {
struct iscsi_session *iscsi = tcp_to_iscsi ( conn );
int session_status = iscsi->status;
/* Clear session status */
iscsi->status = 0;
/* If we are deliberately closing down, exit cleanly */
if ( session_status & ISCSI_STATUS_CLOSING ) {
iscsi_done ( iscsi, status );
return;
}
/* Retry connection if within the retry limit, otherwise fail */
if ( ++iscsi->retry_count <= ISCSI_MAX_RETRIES ) {
DBG ( "iSCSI %p retrying connection\n", iscsi );
@@ -1192,3 +1181,17 @@ struct async_operation * iscsi_issue ( struct iscsi_session *iscsi,
return &iscsi->aop;
}
/**
* Close down iSCSI session
*
* @v iscsi iSCSI session
* @ret aop Asynchronous operation
*/
struct async_operation * iscsi_shutdown ( struct iscsi_session *iscsi ) {
if ( iscsi->status ) {
iscsi->status |= ISCSI_STATUS_CLOSING;
tcp_close ( &iscsi->tcp );
}
return &iscsi->aop;
}