Initial import of libiscsi

2010-12-05 08:24:57 +11:00
commit 098bc5a9a7
23 changed files with 5742 additions and 0 deletions
--- a/lib/connect.c
+++ b/lib/connect.c
@@ -0,0 +1,127 @@
+/*
+   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 Lesser 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 Lesser General Public License
+   along with this program; if not, see <http://www.gnu.org/licenses/>.
+*/
+#include <stdio.h>
+#include <stdlib.h>
+#include <errno.h>
+#include "iscsi.h"
+#include "iscsi-private.h"
+#include "scsi-lowlevel.h"
+
+struct connect_task {
+	iscsi_command_cb cb;
+	void *private_data;
+	int lun;
+};
+
+static void
+iscsi_testunitready_cb(struct iscsi_context *iscsi, int status,
+		       void *command_data, void *private_data)
+{
+	struct connect_task *ct = private_data;
+
+	if (status != 0) {
+		struct scsi_task *scsi = command_data;
+
+		if (scsi->sense.key == SCSI_SENSE_UNIT_ATTENTION
+		    && scsi->sense.ascq == SCSI_SENSE_ASCQ_BUS_RESET) {
+			/* This is just the normal unitattention/busreset
+			 * you always get just after a fresh login. Try
+			 * again.
+			 */
+			if (iscsi_testunitready_async(iscsi, ct->lun,
+						      iscsi_testunitready_cb,
+						      ct) != 0) {
+				iscsi_set_error(iscsi, "iscsi_testunitready "
+						"failed.");
+				ct->cb(iscsi, SCSI_STATUS_ERROR, NULL,
+				       ct->private_data);
+				free(ct);
+			}
+			return;
+		}
+	}
+
+	ct->cb(iscsi, status?SCSI_STATUS_ERROR:SCSI_STATUS_GOOD, NULL,
+	       ct->private_data);
+	free(ct);
+}
+
+static void
+iscsi_login_cb(struct iscsi_context *iscsi, int status, void *command_data _U_,
+	       void *private_data)
+{
+	struct connect_task *ct = private_data;
+
+	if (status != 0) {
+		iscsi_set_error(iscsi, "Failed to login to iSCSI target. "
+				"%s", iscsi_get_error(iscsi));
+		ct->cb(iscsi, SCSI_STATUS_ERROR, NULL, ct->private_data);
+		free(ct);
+		return;
+	}
+
+	if (iscsi_testunitready_async(iscsi, ct->lun,
+				      iscsi_testunitready_cb, ct) != 0) {
+		iscsi_set_error(iscsi, "iscsi_testunitready_async failed.");
+		ct->cb(iscsi, SCSI_STATUS_ERROR, NULL, ct->private_data);
+		free(ct);
+	}
+}
+
+static void
+iscsi_connect_cb(struct iscsi_context *iscsi, int status, void *command_data _U_,
+		 void *private_data)
+{
+	struct connect_task *ct = private_data;
+
+	if (status != 0) {
+		iscsi_set_error(iscsi, "Failed to connect to iSCSI socket. "
+				"%s", iscsi_get_error(iscsi));
+		ct->cb(iscsi, SCSI_STATUS_ERROR, NULL, ct->private_data);
+		free(ct);
+		return;
+	}
+
+	if (iscsi_login_async(iscsi, iscsi_login_cb, ct) != 0) {
+		iscsi_set_error(iscsi, "iscsi_login_async failed.");
+		ct->cb(iscsi, SCSI_STATUS_ERROR, NULL, ct->private_data);
+		free(ct);
+	}
+}
+
+
+int
+iscsi_full_connect_async(struct iscsi_context *iscsi, const char *portal,
+			 int lun, iscsi_command_cb cb, void *private_data)
+{
+	struct connect_task *ct;
+
+	ct = malloc(sizeof(struct connect_task));
+	if (ct == NULL) {
+		iscsi_set_error(iscsi, "Out-of-memory. Failed to allocate "
+				"connect_task structure.");
+		return -ENOMEM;
+	}
+	ct->cb           = cb;
+	ct->lun          = lun;
+	ct->private_data = private_data;
+	if (iscsi_connect_async(iscsi, portal, iscsi_connect_cb, ct) != 0) {
+		free(ct);
+		return -ENOMEM;
+	}
+	return 0;
+}