iscsi: new module from Ronnie.

[ccan] / ccan / iscsi / nop.c

diff --git a/ccan/iscsi/nop.c b/ccan/iscsi/nop.c
new file mode 100644 (file)
index 0000000..e12bd48
--- /dev/null
+++ b/ccan/iscsi/nop.c
@@ -0,0 +1,92 @@
+/* 
+   Copyright (C) 2010 by Ronnie Sahlberg <ronniesahlberg@gmail.com>
+   
+   This program is free software; you can redistribute it and/or modify
+   it under the terms of the GNU General Public License as published by
+   the Free Software Foundation; either version 3 of the License, or
+   (at your option) any later version.
+   
+   This program is distributed in the hope that it will be useful,
+   but WITHOUT ANY WARRANTY; without even the implied warranty of
+   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+   GNU General Public License for more details.
+   
+   You should have received a copy of the GNU General Public License
+   along with this program; if not, see <http://www.gnu.org/licenses/>.
+*/
+
+#include <stdio.h>
+#include "iscsi.h"
+#include "iscsi-private.h"
+
+int iscsi_nop_out_async(struct iscsi_context *iscsi, iscsi_command_cb cb, unsigned char *data, int len, void *private_data)
+{
+       struct iscsi_pdu *pdu;
+
+       if (iscsi == NULL) {
+               printf("trying to send nop-out on NULL context\n");
+               return -1;
+       }
+
+       if (iscsi->is_loggedin == 0) {
+               printf("trying send nop-out while not logged in\n");
+               return -2;
+       }
+
+       pdu = iscsi_allocate_pdu(iscsi, ISCSI_PDU_NOP_OUT, ISCSI_PDU_NOP_IN);
+       if (pdu == NULL) {
+               printf("Failed to allocate nop-out pdu\n");
+               return -3;
+       }
+
+       /* immediate flag */
+       iscsi_pdu_set_immediate(pdu);
+
+       /* flags */
+       iscsi_pdu_set_pduflags(pdu, 0x80);
+
+       /* ttt */
+       iscsi_pdu_set_ttt(pdu, 0xffffffff);
+
+       /* lun */
+       iscsi_pdu_set_lun(pdu, 2);
+
+       /* cmdsn is not increased if Immediate delivery*/
+       iscsi_pdu_set_cmdsn(pdu, iscsi->cmdsn);
+       pdu->cmdsn = iscsi->cmdsn;
+//     iscsi->cmdsn++;
+
+       pdu->callback     = cb;
+       pdu->private_data = private_data;
+
+       if (iscsi_pdu_add_data(iscsi, pdu, data, len) != 0) {
+               printf("Failed to add outdata to nop-out\n");
+               iscsi_free_pdu(iscsi, pdu);
+               return -4;
+       }
+
+
+       if (iscsi_queue_pdu(iscsi, pdu) != 0) {
+               printf("failed to queue iscsi nop-out pdu\n");
+               iscsi_free_pdu(iscsi, pdu);
+               return -5;
+       }
+
+       return 0;
+}
+
+int iscsi_process_nop_out_reply(struct iscsi_context *iscsi, struct iscsi_pdu *pdu, const unsigned char *hdr, int size)
+{
+       struct iscsi_data data;
+
+       data.data = NULL;
+       data.size = 0;
+
+       if (size > ISCSI_HEADER_SIZE) {
+               data.data = discard_const(&hdr[ISCSI_HEADER_SIZE]);
+               data.size = size - ISCSI_HEADER_SIZE;
+       }
+       pdu->callback(iscsi, ISCSI_STATUS_GOOD, &data, pdu->private_data);
+
+       return 0;
+}