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// -*- mode: C; c-basic-offset: 4; tab-width: 4; indent-tabs-mode: nil -*-
// vim: set softtabstop=4 shiftwidth=4 tabstop=4 expandtab:
/*************************************************************************
* Copyright 2009-2012 Eucalyptus Systems, Inc.
*
* 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; version 3 of the License.
*
* 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/.
*
* Please contact Eucalyptus Systems, Inc., 6755 Hollister Ave., Goleta
* CA 93117, USA or visit http://www.eucalyptus.com/licenses/ if you need
* additional information or have any questions.
*
* This file may incorporate work covered under the following copyright
* and permission notice:
*
* Software License Agreement (BSD License)
*
* Copyright (c) 2008, Regents of the University of California
* All rights reserved.
*
* Redistribution and use of this software in source and binary forms,
* with or without modification, are permitted provided that the
* following conditions are met:
*
* Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
*
* Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer
* in the documentation and/or other materials provided with the
* distribution.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
* FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
* COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
* BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
* LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
* CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN
* ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
* POSSIBILITY OF SUCH DAMAGE. USERS OF THIS SOFTWARE ACKNOWLEDGE
* THE POSSIBLE PRESENCE OF OTHER OPEN SOURCE LICENSED MATERIAL,
* COPYRIGHTED MATERIAL OR PATENTED MATERIAL IN THIS SOFTWARE,
* AND IF ANY SUCH MATERIAL IS DISCOVERED THE PARTY DISCOVERING
* IT MAY INFORM DR. RICH WOLSKI AT THE UNIVERSITY OF CALIFORNIA,
* SANTA BARBARA WHO WILL THEN ASCERTAIN THE MOST APPROPRIATE REMEDY,
* WHICH IN THE REGENTS' DISCRETION MAY INCLUDE, WITHOUT LIMITATION,
* REPLACEMENT OF THE CODE SO IDENTIFIED, LICENSING OF THE CODE SO
* IDENTIFIED, OR WITHDRAWAL OF THE CODE CAPABILITY TO THE EXTENT
* NEEDED TO COMPLY WITH ANY SUCH LICENSES OR RIGHTS.
************************************************************************/
//!
//! @file storage/iscsi.c
//! Need to provide description
//!
/*----------------------------------------------------------------------------*\
| |
| INCLUDES |
| |
\*----------------------------------------------------------------------------*/
#include <stdio.h>
#include <stdlib.h>
#include <time.h>
#include <unistd.h> /* close */
#include <assert.h>
#include <string.h>
#include <strings.h>
#include <fcntl.h> /* open */
#include <signal.h>
#include <sys/types.h>
#include <sys/wait.h>
#include <limits.h> /* LOGIN_NAME_MAX */
#include "eucalyptus.h"
#include "config.h"
#include "misc.h"
#include "ipc.h"
#include "euca_string.h"
#include "iscsi.h"
/*----------------------------------------------------------------------------*\
| |
| DEFINES |
| |
\*----------------------------------------------------------------------------*/
#define MAX_OUTPUT 4096
#define CONNECT_TIMEOUT 600
#define DISCONNECT_TIMEOUT 600
#define GET_TIMEOUT 60
/*----------------------------------------------------------------------------*\
| |
| TYPEDEFS |
| |
\*----------------------------------------------------------------------------*/
/*----------------------------------------------------------------------------*\
| |
| ENUMERATIONS |
| |
\*----------------------------------------------------------------------------*/
/*----------------------------------------------------------------------------*\
| |
| STRUCTURES |
| |
\*----------------------------------------------------------------------------*/
/*----------------------------------------------------------------------------*\
| |
| EXTERNAL VARIABLES |
| |
\*----------------------------------------------------------------------------*/
/* Should preferably be handled in header file */
/*----------------------------------------------------------------------------*\
| |
| GLOBAL VARIABLES |
| |
\*----------------------------------------------------------------------------*/
/*----------------------------------------------------------------------------*\
| |
| STATIC VARIABLES |
| |
\*----------------------------------------------------------------------------*/
static char home[EUCA_MAX_PATH] = "";
static char connect_storage_cmd_path[EUCA_MAX_PATH] = "";
static char disconnect_storage_cmd_path[EUCA_MAX_PATH] = "";
static char get_storage_cmd_path[EUCA_MAX_PATH] = "";
// ceph username for use by the specific NC
static char ceph_user[LOGIN_NAME_MAX] = DEFAULT_CEPH_USER;
// path to ceph keyring file on the local host
static char ceph_keyring[EUCA_MAX_PATH] = DEFAULT_CEPH_KEYRING;
// path to ceph conf file on the local host
static char ceph_conf[EUCA_MAX_PATH] = DEFAULT_CEPH_CONF;
static sem *iscsi_sem = NULL; //!< for serializing attach and detach invocations
/*----------------------------------------------------------------------------*\
| |
| STATIC PROTOTYPES |
| |
\*----------------------------------------------------------------------------*/
/*----------------------------------------------------------------------------*\
| |
| MACROS |
| |
\*----------------------------------------------------------------------------*/
/*----------------------------------------------------------------------------*\
| |
| IMPLEMENTATION |
| |
\*----------------------------------------------------------------------------*/
//!
//!
//!
//! @param[in] euca_home
//!
void init_iscsi(const char *euca_home, const char *new_ceph_user, const char *new_ceph_keyring, const char *new_ceph_conf)
{
const char *tmp = NULL;
if (euca_home) {
tmp = euca_home;
} else {
if ((tmp = getenv(EUCALYPTUS_ENV_VAR_NAME)) == NULL) {
tmp = "/opt/eucalyptus";
}
}
euca_strncpy(home, tmp, sizeof(home));
snprintf(connect_storage_cmd_path, EUCA_MAX_PATH, EUCALYPTUS_CONNECT_ISCSI, home, home);
snprintf(disconnect_storage_cmd_path, EUCA_MAX_PATH, EUCALYPTUS_DISCONNECT_ISCSI, home, home);
snprintf(get_storage_cmd_path, EUCA_MAX_PATH, EUCALYPTUS_GET_ISCSI, home, home);
// override defaults for the Ceph parameters
if (new_ceph_user != NULL) {
euca_strncpy(ceph_user, new_ceph_user, sizeof(ceph_user));
LOGDEBUG(" Ceph user: %s\n", ceph_user);
}
if (new_ceph_keyring != NULL) {
euca_strncpy(ceph_keyring, new_ceph_keyring, sizeof(ceph_keyring));
LOGDEBUG(" Ceph keyring path: %s\n", ceph_keyring);
}
if (new_ceph_conf != NULL) {
euca_strncpy(ceph_conf, new_ceph_conf, sizeof(ceph_conf));
LOGDEBUG("Ceph configuration path: %s\n", ceph_conf);
}
// initialize the semaphore on first invocation only
if (iscsi_sem == NULL) {
iscsi_sem = sem_alloc(1, IPC_MUTEX_SEMAPHORE);
}
}
//!
//!
//!
//! @param[in] dev_string
//!
//! @return a pointer
//!
char *connect_iscsi_target(const char *volume_id, const char *target_dev, const char *target_serial, const char *target_bus, const char *dev_string)
{
int ret = 0;
char command[EUCA_MAX_PATH] = "";
char stdout_str[MAX_OUTPUT] = "";
char stderr_str[MAX_OUTPUT] = "";
assert(strlen(home));
snprintf(command, EUCA_MAX_PATH, "%s %s,%s,%s,%s,%s,%s,%s,%s,%s",
connect_storage_cmd_path, home, volume_id, target_dev, target_serial, target_bus, ceph_user, ceph_keyring, ceph_conf, dev_string);
LOGDEBUG("invoking `%s`\n", command);
sem_p(iscsi_sem);
ret = timeshell(command, stdout_str, stderr_str, MAX_OUTPUT, CONNECT_TIMEOUT);
sem_v(iscsi_sem);
LOGDEBUG("connect script returned: %d, stdout: '%s', stderr: '%s'\n", ret, stdout_str, stderr_str);
if (ret == 0)
return (strdup(stdout_str));
return (NULL);
}
//!
//! Disconnects the iscsi device by closing the session and deleting the lun locally.
//!
//! @param[in] dev_string
//! @param[in] do_rescan
//!
//! @return -1 for any failures, 0 if a timeout occured or a positive value is success.
//!
int disconnect_iscsi_target(const char *dev_string, boolean do_rescan)
{
int ret = 0;
char command[EUCA_MAX_PATH] = "";
char stdout_str[MAX_OUTPUT] = "";
char stderr_str[MAX_OUTPUT] = "";
assert(strlen(home));
snprintf(command, EUCA_MAX_PATH, "%s %s,,,,,,,,%s%s", disconnect_storage_cmd_path, home, dev_string, (do_rescan) ? (" norescan") : (""));
LOGDEBUG("invoking `%s`\n", command);
sem_p(iscsi_sem);
ret = timeshell(command, stdout_str, stderr_str, MAX_OUTPUT, DISCONNECT_TIMEOUT);
sem_v(iscsi_sem);
LOGDEBUG("disconnect script returned: %d, stdout: '%s', stderr: '%s'\n", ret, stdout_str, stderr_str);
return (ret);
}
//!
//!
//!
//! @param[in] dev_string
//!
//! @return a pointer
//!
char *get_iscsi_target(const char *dev_string)
{
int ret = 0;
char command[EUCA_MAX_PATH] = "";
char stdout_str[MAX_OUTPUT] = "";
char stderr_str[MAX_OUTPUT] = "";
assert(strlen(home));
snprintf(command, EUCA_MAX_PATH, "%s %s,,,,,,,,%s", get_storage_cmd_path, home, dev_string);
LOGDEBUG("invoking `%s`\n", command);
sem_p(iscsi_sem);
ret = timeshell(command, stdout_str, stderr_str, MAX_OUTPUT, GET_TIMEOUT);
sem_v(iscsi_sem);
LOGDEBUG("get storage script returned: %d, stdout: '%s', stderr: '%s'\n", ret, stdout_str, stderr_str);
if (ret == 0)
return (strdup(stdout_str));
return (NULL);
}
//!
//!
//!
//! @param[in] dev_string
//!
//! @return EUCA_OK if the device is an ISCSI or EUCA_ERROR if not
//!
int check_iscsi(const char *dev_string)
{
if (strchr(dev_string, ',') == NULL)
return (EUCA_OK);
return (EUCA_ERROR);
}