/
vbr.c
2987 lines (2720 loc) · 112 KB
/
vbr.c
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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/vbr.c
//! Need to provide description
//!
/*----------------------------------------------------------------------------*\
| |
| INCLUDES |
| |
\*----------------------------------------------------------------------------*/
#define _GNU_SOURCE
#include <stdio.h>
#include <stdlib.h>
#include <string.h> // strcasestr
#include <unistd.h>
#include <string.h>
#include <sys/types.h>
#include <sys/stat.h>
#include <sys/wait.h> // waitpid
#include <stdarg.h>
#include <fcntl.h>
#include <errno.h>
#include <limits.h>
#include <assert.h>
#include <dirent.h>
#include <eucalyptus.h>
#include <misc.h> // logprintfl, ensure_...
#include <hash.h>
#include <data.h>
#include <euca_string.h>
#include "vbr.h"
#include "walrus.h"
#include "blobstore.h"
#include "diskutil.h"
//#include "iscsi.h"
#include "http.h"
#include "ebs_utils.h"
#include <ipc.h>
/*----------------------------------------------------------------------------*\
| |
| DEFINES |
| |
\*----------------------------------------------------------------------------*/
#define ART_SIG_MAX 262144 //!< must be big enough for a digest and then some
#define FIND_BLOB_TIMEOUT_USEC 50000LL //!< @TODO: use 100 or less to induce rare timeouts
#define DELETE_BLOB_TIMEOUT_USEC 50000LL
#define FIND 0
#define CREATE 1
#define ARTIFACT_RETRY_SLEEP_USEC 500000LL
#ifdef _UNIT_TEST
#define BS_SIZE 20000000000 / 512
#define KEY1 "ssh-rsa AAAAB3NzaC1yc2EAAAADAQABAAABAQCVWU+h3gDF4sGjUB7t...\n"
#define KEY2 "ssh-rsa BBBBB3NzaC1yc2EAAAADAQABAAABAQCVWU+h3gDF4sGjUB7t...\n"
#define EKI1 "eki-1ABC123"
#define ERI1 "eri-1BCD234"
#define EMI1 "emi-1CDE345"
#define EMI2 "emi-2DEF456"
#define SERIAL_ITERATIONS 3
#define COMPETITIVE_PARTICIPANTS 3
#define COMPETITIVE_ITERATIONS 3
#define TOTAL_VMS 1 + SERIAL_ITERATIONS + COMPETITIVE_ITERATIONS * COMPETITIVE_PARTICIPANTS
#define VBR_SIZE ( 2LL * MEGABYTE )
#define EKI_SIZE ( 1024LL )
#endif /* _UNIT_TEST */
/*----------------------------------------------------------------------------*\
| |
| TYPEDEFS |
| |
\*----------------------------------------------------------------------------*/
/*----------------------------------------------------------------------------*\
| |
| ENUMERATIONS |
| |
\*----------------------------------------------------------------------------*/
/*----------------------------------------------------------------------------*\
| |
| STRUCTURES |
| |
\*----------------------------------------------------------------------------*/
/*----------------------------------------------------------------------------*\
| |
| EXTERNAL VARIABLES |
| |
\*----------------------------------------------------------------------------*/
/* Should preferably be handled in header file */
/*----------------------------------------------------------------------------*\
| |
| GLOBAL VARIABLES |
| |
\*----------------------------------------------------------------------------*/
#ifdef _UNIT_TEST
const char *euca_this_component_name = "sc"; //!< Eucalyptus Component Name
const char *euca_client_component_name = "nc"; //!< The client component name
#endif /*_UNIT_TEST */
/*----------------------------------------------------------------------------*\
| |
| STATIC VARIABLES |
| |
\*----------------------------------------------------------------------------*/
static __thread char current_instanceId[512] = ""; //!< instance ID that is being serviced, for logging only
static sem *hostconfig_sem;
#ifdef _UNIT_TEST
static blobstore *cache_bs = NULL;
static blobstore *work_bs = NULL;
static int next_instances_slot = 0;
static int provisioned_instances = 0;
static pthread_mutex_t competitors_mutex = PTHREAD_MUTEX_INITIALIZER; //!< process-global mutex
static virtualMachine vm_slots[TOTAL_VMS] = { {0} };
static char vm_ids[TOTAL_VMS][PATH_MAX] = { {0} };
static boolean do_fork = 0;
#endif /* _UNIT_TEST */
/*----------------------------------------------------------------------------*\
| |
| STATIC PROTOTYPES |
| |
\*----------------------------------------------------------------------------*/
static int prep_location(virtualBootRecord * vbr, ncMetadata * pMeta, const char *typeName);
static int parse_rec(virtualBootRecord * vbr, virtualMachine * vm, ncMetadata * pMeta);
static void update_vbr_with_backing_info(artifact * a);
//! @{
//! @name Creator Functions
//! The following *_creator funcitons produce an artifact in blobstore, either from scratch (such as Walrus
//! download or a new partition) or by converting, combining, and augmenting existing artifacts.
//!
//! When invoked, creators can assume that any input blobs and the output blob are open (and thus locked for
//! their exclusive use).
//!
//! Creators return OK or an error code: either generic one (ERROR) or a code specific to a failed blobstore
//! operation, which can be obtained using blobstore_get_error().
static int url_creator(artifact * a);
static int walrus_creator(artifact * a);
static int partition_creator(artifact * a);
static void set_disk_dev(virtualBootRecord * vbr);
static int disk_creator(artifact * a);
#ifndef _NO_EBS
static int iqn_creator(artifact * a);
#endif // ! _NO_EBS
static int copy_creator(artifact * a);
//! @}
static void art_print_tree(const char *prefix, artifact * a);
static int art_gen_id(char *buf, unsigned int buf_size, const char *first, const char *sig);
static void convert_id(const char *src, char *dst, unsigned int size);
static char *url_get_digest(const char *url);
static artifact *art_alloc_vbr(virtualBootRecord * vbr, boolean do_make_work_copy, boolean is_migration_dest, boolean must_be_file, const char *sshkey);
static artifact *art_alloc_disk(virtualBootRecord * vbr, artifact * prereqs[], int num_prereqs, artifact * parts[], int num_parts,
artifact * emi_disk, boolean do_make_bootable, boolean do_make_work_copy, boolean is_migration_dest);
static int find_or_create_blob(int flags, blobstore * bs, const char *id, long long size_bytes, const char *sig, blockblob ** bbp);
static int find_or_create_artifact(int do_create, artifact * a, blobstore * work_bs, blobstore * cache_bs, const char *work_prefix, blockblob ** bbp);
#ifdef _UNIT_TEST
static blobstore *create_teststore(int size_blocks, const char *base, const char *name, blobstore_format_t format, blobstore_revocation_t revocation,
blobstore_snapshot_t snapshot);
static void add_vbr(virtualMachine * vm, long long size, ncResourceFormatType format, char *formatName, const char *id, ncResourceType type,
ncResourceLocationType locationType, int diskNumber, int partitionNumber, libvirtBusType guestDeviceBus, char *preparedResourceLocation);
static int provision_vm(const char *id, const char *sshkey, const char *eki, const char *eri, const char *emi, blobstore * cache_bs,
blobstore * work_bs, boolean do_make_work_copy);
static int cleanup_vms(void);
static char *gen_id(char *id, unsigned int id_len, const char *prefix);
static void *competitor_function(void *ptr);
static int check_blob(blobstore * bs, const char *keyword, int expect);
static void dummy_err_fn(const char *msg);
#endif /* _UNIT_TEST */
/*----------------------------------------------------------------------------*\
| |
| MACROS |
| |
\*----------------------------------------------------------------------------*/
//! A safe macro to free an artifact. Forces the pointer to NULL afterwards
#define ART_FREE(_a) \
{ \
art_free((_a)); \
(_a) = NULL; \
}
#ifdef _UNIT_TEST
#define GEN_ID() gen_id(id, sizeof(id), "12345678")
#endif /* _UNIT_TEST */
/*----------------------------------------------------------------------------*\
| |
| IMPLEMENTATION |
| |
\*----------------------------------------------------------------------------*/
//!
//! Initializes the global host config
//!
//! @param[in] hostIqn
//! @param[in] hostIp
//! @param[in] ws_sec_policy_file
//! @param[in] use_ws_sec
//!
//! @return EUCA_OK
//!
//! @pre
//!
//! @note
//!
int vbr_init_hostconfig(char *hostIqn, char *hostIp, char *ws_sec_policy_file, int use_ws_sec)
{
LOGDEBUG("Initializing host config for VBR. Setting IP, IQN, and security policy\n");
euca_strncpy(localhost_config.iqn, hostIqn, CHAR_BUFFER_SIZE);
euca_strncpy(localhost_config.ip, hostIp, HOSTNAME_SIZE);
euca_strncpy(localhost_config.ws_sec_policy_file, ws_sec_policy_file, EUCA_MAX_PATH);
localhost_config.use_ws_sec = use_ws_sec;
LOGDEBUG("VBR host config set to ip: %s iqn: %s, use_sec = %d, policy file = %s\n", localhost_config.ip, localhost_config.iqn, localhost_config.use_ws_sec,
localhost_config.ws_sec_policy_file);
hostconfig_sem = sem_alloc(1, IPC_MUTEX_SEMAPHORE);
return EUCA_OK;
}
//!
//! Semaphore protected read of the sc_url from the config
//! Destination buffer must be at least 512 in size
//!
//! @param[in] dest
//!
//! @return EUCA_OK on success or EUCA_ERROR on failure
//!
//! @pre
//!
//! @note
//!
int get_localhost_sc_url(char *dest)
{
int ret = 0;
sem_p(hostconfig_sem);
{
if (strlen(localhost_config.sc_url) == 0) {
LOGERROR("No sc url found in localhost_config.\n");
ret = EUCA_ERROR;
} else {
if (!euca_strncpy(dest, localhost_config.sc_url, 512)) {
LOGERROR("Failed up copy VBR hostconfig SC URL %s to destination buffer\n", localhost_config.sc_url);
ret = EUCA_ERROR;
} else {
ret = EUCA_OK;
}
}
}
sem_v(hostconfig_sem);
return ret;
}
//!
//! Semaphore protected hostconfig update.
//!
//! @param[in] new_sc_url
//!
//! @return
//!
//! @pre
//!
//! @note
//!
int vbr_update_hostconfig_scurl(char *new_sc_url)
{
sem_p(hostconfig_sem);
if (!euca_strncpy(localhost_config.sc_url, new_sc_url, 512)) {
LOGERROR("Failed up update VBR hostconfig SC URL to %s from %s\n", new_sc_url, localhost_config.sc_url);
sem_v(hostconfig_sem);
return EUCA_ERROR;
} else {
LOGTRACE("Updated sc url in VBR hostconfig to %s\n", localhost_config.sc_url);
sem_v(hostconfig_sem);
return EUCA_OK;
}
}
//!
//! Picks a service URI and prepends it to resourceLocation in VBR
//!
//! @param[in] vbr
//! @param[in] pMeta a pointer to the node controller (NC) metadata structure
//! @param[in] typeName
//!
//! @return
//!
//! @pre
//!
//! @note
//!
static int prep_location(virtualBootRecord * vbr, ncMetadata * pMeta, const char *typeName)
{
int i;
for (i = 0; i < pMeta->servicesLen; i++) {
serviceInfoType *service = &(pMeta->services[i]);
if (strncmp(service->type, typeName, strlen(typeName) - 3) == 0 && service->urisLen > 0) {
if (strcmp(typeName, "storage")) {
//Anything other than storage/ebs
char *l = vbr->resourceLocation + (strlen(typeName) + 3); // +3 for "://", so 'l' points past, e.g., "walrus:"
snprintf(vbr->preparedResourceLocation, sizeof(vbr->preparedResourceLocation), "%s/%s", service->uris[0], l); //! @TODO for now we just pick the first one
snprintf(vbr->resourceLocation, sizeof(vbr->resourceLocation), vbr->preparedResourceLocation); //! @TODO trying this out
} else {
//For storage, just copy the url for the SC into the preparedResourceLocation slot
snprintf(vbr->preparedResourceLocation, sizeof(vbr->preparedResourceLocation), "%s", service->uris[0]); //! @TODO for now we just pick the first one
}
return EUCA_OK;
}
}
LOGERROR("failed to find service '%s' in eucalyptusMessage\n", typeName);
return EUCA_ERROR;
}
//!
//! Parse spec_str as a VBR record and add it to vm_type->virtualBootRecord[virtualBootRecordLen]
//!
//! @param[in] spec_str
//! @param[in] vm_type
//!
//! @return
//!
//! @pre
//!
//! @note
//!
int vbr_add_ascii(const char *spec_str, virtualMachine * vm_type)
{
if (vm_type->virtualBootRecordLen == EUCA_MAX_VBRS) {
LOGERROR("too many entries in VBR already\n");
return 1;
}
virtualBootRecord *vbr = &(vm_type->virtualBootRecord[vm_type->virtualBootRecordLen++]);
char *spec_copy = strdup(spec_str);
char *type_spec = strtok(spec_copy, ":");
char *id_spec = strtok(NULL, ":");
char *size_spec = strtok(NULL, ":");
char *format_spec = strtok(NULL, ":");
char *dev_spec = strtok(NULL, ":");
char *loc_spec = strtok(NULL, ":");
if (type_spec == NULL) {
LOGERROR("invalid 'type' specification in VBR '%s'\n", spec_str);
goto out_error;
}
euca_strncpy(vbr->typeName, type_spec, sizeof(vbr->typeName));
if (id_spec == NULL) {
LOGERROR("invalid 'id' specification in VBR '%s'\n", spec_str);
goto out_error;
}
euca_strncpy(vbr->id, id_spec, sizeof(vbr->id));
if (size_spec == NULL) {
LOGERROR("invalid 'size' specification in VBR '%s'\n", spec_str);
goto out_error;
}
vbr->sizeBytes = atoll(size_spec);
if (format_spec == NULL) {
LOGERROR("invalid 'format' specification in VBR '%s'\n", spec_str);
goto out_error;
}
euca_strncpy(vbr->formatName, format_spec, sizeof(vbr->formatName));
if (dev_spec == NULL) {
LOGERROR("invalid 'guestDeviceName' specification in VBR '%s'\n", spec_str);
goto out_error;
}
euca_strncpy(vbr->guestDeviceName, dev_spec, sizeof(vbr->guestDeviceName));
if (loc_spec == NULL) {
LOGERROR("invalid 'resourceLocation' specification in VBR '%s'\n", spec_str);
goto out_error;
}
euca_strncpy(vbr->resourceLocation, spec_str + (loc_spec - spec_copy), sizeof(vbr->resourceLocation));
EUCA_FREE(spec_copy);
return 0;
out_error:
vm_type->virtualBootRecordLen--;
EUCA_FREE(spec_copy);
return 1;
}
//!
//! Parses the VBR as supplied by a client or user, checks values, and fills out almost the rest of the struct with typed values
//!
//! @param[in] vbr pointer to a VBR record to parse and verify
//! @param[in] vm OPTIONAL parameter for setting image/kernel/ramdik pointers in the virtualMachine struct
//! @param[in] pMeta a pointer to the node controller (NC) metadata structure
//!
//! @return
//!
//! @pre
//!
//! @note
//!
static int parse_rec(virtualBootRecord * vbr, virtualMachine * vm, ncMetadata * pMeta)
{
// check the type (the only mandatory field)
if (strstr(vbr->typeName, "machine") == vbr->typeName) {
vbr->type = NC_RESOURCE_IMAGE;
if (vm)
vm->root = vbr;
} else if (strstr(vbr->typeName, "kernel") == vbr->typeName) {
vbr->type = NC_RESOURCE_KERNEL;
if (vm)
vm->kernel = vbr;
} else if (strstr(vbr->typeName, "ramdisk") == vbr->typeName) {
vbr->type = NC_RESOURCE_RAMDISK;
if (vm)
vm->ramdisk = vbr;
} else if (strstr(vbr->typeName, "ephemeral") == vbr->typeName) {
vbr->type = NC_RESOURCE_EPHEMERAL;
if (strstr(vbr->typeName, "ephemeral0") == vbr->typeName) {
if (vm) {
vm->ephemeral0 = vbr;
}
}
} else if (strstr(vbr->typeName, "swap") == vbr->typeName) {
vbr->type = NC_RESOURCE_SWAP;
if (vm)
vm->swap = vbr;
} else if (strstr(vbr->typeName, "ebs") == vbr->typeName) {
vbr->type = NC_RESOURCE_EBS;
} else if (strstr(vbr->typeName, "boot") == vbr->typeName) {
vbr->type = NC_RESOURCE_BOOT;
if (vm)
vm->boot = vbr;
} else {
LOGERROR("failed to parse resource type '%s'\n", vbr->typeName);
return EUCA_ERROR;
}
// identify the type of resource location from location string
int error = EUCA_OK;
if (strcasestr(vbr->resourceLocation, "http://") == vbr->resourceLocation || strcasestr(vbr->resourceLocation, "https://") == vbr->resourceLocation) {
if (strcasestr(vbr->resourceLocation, "/services/Walrus/")) {
vbr->locationType = NC_LOCATION_WALRUS;
} else {
vbr->locationType = NC_LOCATION_URL;
}
euca_strncpy(vbr->preparedResourceLocation, vbr->resourceLocation, sizeof(vbr->preparedResourceLocation));
} else if (strcasestr(vbr->resourceLocation, "walrus://") == vbr->resourceLocation) {
vbr->locationType = NC_LOCATION_WALRUS;
if (pMeta)
error = prep_location(vbr, pMeta, "walrus");
} else if (strcasestr(vbr->resourceLocation, "cloud://") == vbr->resourceLocation) {
vbr->locationType = NC_LOCATION_CLC;
if (pMeta)
error = prep_location(vbr, pMeta, "cloud");
} else if (strcasestr(vbr->resourceLocation, "sc://") == vbr->resourceLocation || strcasestr(vbr->resourceLocation, "storage://") == vbr->resourceLocation) { //! @TODO is it 'sc' or 'storage'?
vbr->locationType = NC_LOCATION_SC;
if (pMeta)
error = prep_location(vbr, pMeta, "storage");
} else if (strcasestr(vbr->resourceLocation, "none") == vbr->resourceLocation) {
if (vbr->type != NC_RESOURCE_EPHEMERAL && vbr->type != NC_RESOURCE_SWAP && vbr->type != NC_RESOURCE_BOOT) {
LOGERROR("resourceLocation not specified for non-ephemeral resource '%s'\n", vbr->resourceLocation);
return EUCA_ERROR;
}
vbr->locationType = NC_LOCATION_NONE;
} else {
LOGERROR("failed to parse resource location '%s'\n", vbr->resourceLocation);
return EUCA_ERROR;
}
if (error != EUCA_OK) {
LOGERROR("URL for resourceLocation '%s' is not in the message\n", vbr->resourceLocation);
return EUCA_ERROR;
}
// device can be 'none' only for kernel and ramdisk types
if (!strcmp(vbr->guestDeviceName, "none")) {
if (vbr->type != NC_RESOURCE_KERNEL && vbr->type != NC_RESOURCE_RAMDISK) {
LOGERROR("guestDeviceName not specified for resource '%s'\n", vbr->resourceLocation);
return EUCA_ERROR;
}
} else { // should be a valid device
// trim off "/dev/" prefix, if present, and verify the rest
if (strstr(vbr->guestDeviceName, "/dev/") == vbr->guestDeviceName) {
LOGWARN("trimming off invalid prefix '/dev/' from guestDeviceName '%s'\n", vbr->guestDeviceName);
char buf[10];
euca_strncpy(buf, vbr->guestDeviceName + 5, sizeof(buf));
euca_strncpy(vbr->guestDeviceName, buf, sizeof(vbr->guestDeviceName));
}
if (strlen(vbr->guestDeviceName) < 3 || (vbr->guestDeviceName[0] == 'x' && strlen(vbr->guestDeviceName) < 4)) {
LOGERROR("invalid guestDeviceName '%s'\n", vbr->guestDeviceName);
return EUCA_ERROR;
}
{
char t = vbr->guestDeviceName[0]; // type
switch (t) {
case 'h':
vbr->guestDeviceType = DEV_TYPE_DISK;
vbr->guestDeviceBus = BUS_TYPE_IDE;
break;
case 's':
vbr->guestDeviceType = DEV_TYPE_DISK;
vbr->guestDeviceBus = BUS_TYPE_SCSI;
break;
case 'f':
vbr->guestDeviceType = DEV_TYPE_FLOPPY;
vbr->guestDeviceBus = BUS_TYPE_IDE;
break;
case 'v':
vbr->guestDeviceType = DEV_TYPE_DISK;
vbr->guestDeviceBus = BUS_TYPE_VIRTIO;
break;
case 'x':
vbr->guestDeviceType = DEV_TYPE_DISK;
vbr->guestDeviceBus = BUS_TYPE_XEN;
break;
default:
LOGERROR("failed to parse disk type guestDeviceName '%s'\n", vbr->guestDeviceName);
return EUCA_ERROR;
}
size_t letters_len = 3; // e.g. "sda"
if (t == 'x')
letters_len = 4; // e.g., "xvda"
if (t == 'f')
letters_len = 2; // e.g., "fd0"
char d = vbr->guestDeviceName[letters_len - 2]; // when 3+, the 'd'
char n = vbr->guestDeviceName[letters_len - 1]; // when 3+, the disk number
if (strlen(vbr->guestDeviceName) > letters_len) {
long long int p = 0; // partition or floppy drive number
errno = 0;
p = strtoll(vbr->guestDeviceName + letters_len, NULL, 10);
if (errno != 0) {
LOGERROR("failed to parse partition number in guestDeviceName '%s'\n", vbr->guestDeviceName);
return EUCA_ERROR;
}
if (p < 0 || p > EUCA_MAX_PARTITIONS) {
LOGERROR("unexpected partition or disk number '%lld' in guestDeviceName '%s'\n", p, vbr->guestDeviceName);
return EUCA_ERROR;
}
if (t == 'f') {
vbr->diskNumber = p;
} else {
if (p < 1) {
LOGERROR("unexpected partition number '%lld' in guestDeviceName '%s'\n", p, vbr->guestDeviceName);
return EUCA_ERROR;
}
vbr->partitionNumber = p;
}
} else {
vbr->partitionNumber = 0;
}
if (vbr->guestDeviceType != DEV_TYPE_FLOPPY) {
if (d != 'd') {
LOGERROR("failed to parse disk type guestDeviceName '%s'\n", vbr->guestDeviceName);
return EUCA_ERROR;
}
assert(EUCA_MAX_DISKS >= 'z' - 'a');
if (!(n >= 'a' && n <= 'z')) {
LOGERROR("failed to parse disk type guestDeviceName '%s'\n", vbr->guestDeviceName);
return EUCA_ERROR;
}
vbr->diskNumber = n - 'a';
}
}
}
// parse ID
if (strlen(vbr->id) < 4) {
LOGERROR("failed to parse VBR resource ID '%s' (use 'none' when no ID)\n", vbr->id);
return EUCA_ERROR;
}
// parse disk formatting instructions (none = do not format)
if (strstr(vbr->formatName, "none") == vbr->formatName) {
vbr->format = NC_FORMAT_NONE;
} else if (strstr(vbr->formatName, "ext2") == vbr->formatName) {
vbr->format = NC_FORMAT_EXT2;
} else if (strstr(vbr->formatName, "ext3") == vbr->formatName) {
vbr->format = NC_FORMAT_EXT3;
} else if (strstr(vbr->formatName, "ntfs") == vbr->formatName) {
vbr->format = NC_FORMAT_NTFS;
} else if (strstr(vbr->formatName, "swap") == vbr->formatName) {
vbr->format = NC_FORMAT_SWAP;
} else {
LOGERROR("failed to parse resource format '%s'\n", vbr->formatName);
return EUCA_ERROR;
}
if (vbr->type == NC_RESOURCE_EPHEMERAL || vbr->type == NC_RESOURCE_SWAP || vbr->type == NC_RESOURCE_BOOT) { //! @TODO should we allow ephemeral/swap that reside remotely?
if (vbr->sizeBytes < 1) {
LOGERROR("invalid size '%lld' for ephemeral resource '%s'\n", vbr->sizeBytes, vbr->resourceLocation);
return EUCA_ERROR;
}
} else {
// if (vbr->sizeBytes!=1 || vbr->format!=NC_FORMAT_NONE) { //! @TODO check for sizeBytes!=-1
if (vbr->format != NC_FORMAT_NONE) {
LOGERROR("invalid format '%s' for non-ephemeral resource '%s'\n", vbr->formatName, vbr->resourceLocation);
return EUCA_ERROR;
}
}
return EUCA_OK;
}
//!
//! Parses and verifies all VBR entries in the virtual machine definition
//!
//! @param[in] vm pointer to vm definition containing VBR records
//! @param[in] pMeta a pointer to the node controller (NC) metadata structure
//!
//! @return
//!
//! @pre
//!
//! @note
//!
int vbr_parse(virtualMachine * vm, ncMetadata * pMeta)
{
virtualBootRecord *partitions[BUS_TYPES_TOTAL][EUCA_MAX_DISKS][EUCA_MAX_PARTITIONS]; // for validating partitions
bzero(partitions, sizeof(partitions)); //! @fixme: chuck - this is not zeroing out the hole structure!!!
for (int i = 0; i < EUCA_MAX_VBRS && i < vm->virtualBootRecordLen; i++) {
virtualBootRecord *vbr = &(vm->virtualBootRecord[i]);
if (strlen(vbr->typeName) == 0) { // this must be the combined disk's VBR
return EUCA_OK;
}
if (parse_rec(vbr, vm, pMeta) != EUCA_OK)
return EUCA_ERROR;
if (vbr->type != NC_RESOURCE_KERNEL && vbr->type != NC_RESOURCE_RAMDISK)
partitions[vbr->guestDeviceBus][vbr->diskNumber][vbr->partitionNumber] = vbr;
if (vm->root == NULL) { // we have not identified the EMI yet
if (vbr->type == NC_RESOURCE_IMAGE || (vbr->type == NC_RESOURCE_EBS && vbr->diskNumber == 0 && vbr->partitionNumber == 0)) {
vm->root = vbr;
}
} else {
if (vm->root != vbr && vbr->type == NC_RESOURCE_IMAGE) {
LOGERROR("more than one EMI specified in the boot record\n");
return EUCA_ERROR;
}
}
}
// ensure that partitions are contiguous and that partitions and disks are not mixed
for (int i = 0; i < BUS_TYPES_TOTAL; i++) { // each bus type is treated separatedly
for (int j = 0; j < EUCA_MAX_DISKS; j++) {
int has_partitions = 0;
for (int k = EUCA_MAX_PARTITIONS - 1; k >= 0; k--) { // count down
if (partitions[i][j][k]) {
if (k == 0 && has_partitions) {
LOGERROR("specifying both disk and a partition on the disk is not allowed\n");
return EUCA_ERROR;
}
has_partitions = 1;
} else {
if (k != 0 && has_partitions) {
LOGERROR("gaps in partition table are not allowed\n");
return EUCA_ERROR;
}
}
if (vm->root == NULL) { // root partition or disk have not been found yet (no NC_RESOURCE_IMAGE)
virtualBootRecord *vbr;
if (has_partitions)
vbr = partitions[i][j][1];
else
vbr = partitions[i][j][0];
if (vbr && (vbr->type == NC_RESOURCE_EBS))
vm->root = vbr;
}
}
}
}
if (vm->root == NULL) {
LOGERROR("no root partition or disk have been found\n");
return EUCA_ERROR;
}
return EUCA_OK;
}
//!
//! Constructs VBRs for {image|kernel|ramdisk}x{Id|URL} entries (DEPRECATED)
//!
//! @param[in] instanceId the instance identifier string (i-XXXXXXXX)
//! @param[in] params pointer to the virtual machine parameters
//! @param[in] imageId OPTIONAL
//! @param[in] imageURL OPTIONALL
//! @param[in] kernelId OPTIONAL
//! @param[in] kernelURL OPTIONAL
//! @param[in] ramdiskId OPTIONAL
//! @param[in] ramdiskURL OPTIONAL
//!
//! @return
//!
//! @pre
//!
//! @note
//!
int vbr_legacy(const char *instanceId, virtualMachine * params, char *imageId, char *imageURL, char *kernelId, char *kernelURL, char *ramdiskId, char *ramdiskURL)
{
int i;
int found_image = 0;
int found_kernel = 0;
int found_ramdisk = 0;
for (i = 0; i < EUCA_MAX_VBRS && i < params->virtualBootRecordLen; i++) {
virtualBootRecord *vbr = &(params->virtualBootRecord[i]);
if (strlen(vbr->resourceLocation) > 0) {
LOGDEBUG("[%s] VBR[%d] type=%s id=%s dev=%s size=%lld format=%s %s\n",
instanceId, i, vbr->typeName, vbr->id, vbr->guestDeviceName, vbr->sizeBytes, vbr->formatName, vbr->resourceLocation);
if (!strcmp(vbr->typeName, "machine"))
found_image = 1;
if (!strcmp(vbr->typeName, "kernel"))
found_kernel = 1;
if (!strcmp(vbr->typeName, "ramdisk"))
found_ramdisk = 1;
} else {
break;
}
}
// legacy support for image{Id|URL}
if (imageId && imageURL) {
if (found_image) {
LOGWARN("[%s] IGNORING image %s passed outside the virtual boot record\n", instanceId, imageId);
} else {
LOGWARN("[%s] LEGACY pre-VBR image id=%s URL=%s\n", instanceId, imageId, imageURL);
if (i >= EUCA_MAX_VBRS - 2) {
LOGERROR("[%s] out of room in the Virtual Boot Record for legacy image %s\n", instanceId, imageId);
return EUCA_ERROR;
}
{ // create root partition VBR
virtualBootRecord *vbr = &(params->virtualBootRecord[i++]);
euca_strncpy(vbr->resourceLocation, imageURL, sizeof(vbr->resourceLocation));
euca_strncpy(vbr->guestDeviceName, "sda1", sizeof(vbr->guestDeviceName));
euca_strncpy(vbr->id, imageId, sizeof(vbr->id));
euca_strncpy(vbr->typeName, "machine", sizeof(vbr->typeName));
vbr->sizeBytes = -1;
euca_strncpy(vbr->formatName, "none", sizeof(vbr->formatName));
params->virtualBootRecordLen++;
}
{ // create ephemeral partition VBR
virtualBootRecord *vbr = &(params->virtualBootRecord[i++]);
euca_strncpy(vbr->resourceLocation, "none", sizeof(vbr->resourceLocation));
euca_strncpy(vbr->guestDeviceName, "sda2", sizeof(vbr->guestDeviceName));
euca_strncpy(vbr->id, "none", sizeof(vbr->id));
euca_strncpy(vbr->typeName, "ephemeral0", sizeof(vbr->typeName));
vbr->sizeBytes = 536870912; // we cannot compute it here, so pick something
euca_strncpy(vbr->formatName, "ext2", sizeof(vbr->formatName));
params->virtualBootRecordLen++;
}
{ // create swap partition VBR
virtualBootRecord *vbr = &(params->virtualBootRecord[i++]);
euca_strncpy(vbr->resourceLocation, "none", sizeof(vbr->resourceLocation));
euca_strncpy(vbr->guestDeviceName, "sda3", sizeof(vbr->guestDeviceName));
euca_strncpy(vbr->id, "none", sizeof(vbr->id));
euca_strncpy(vbr->typeName, "swap", sizeof(vbr->typeName));
vbr->sizeBytes = 536870912;
euca_strncpy(vbr->formatName, "swap", sizeof(vbr->formatName));
params->virtualBootRecordLen++;
}
}
}
// legacy support for kernel{Id|URL}
if (kernelId && kernelURL) {
if (found_kernel) {
LOGINFO("[%s] IGNORING kernel %s passed outside the virtual boot record\n", instanceId, kernelId);
} else {
LOGINFO("[%s] LEGACY pre-VBR kernel id=%s URL=%s\n", instanceId, kernelId, kernelURL);
if (i == EUCA_MAX_VBRS) {
LOGERROR("[%s] out of room in the Virtual Boot Record for legacy kernel %s\n", instanceId, kernelId);
return EUCA_ERROR;
}
virtualBootRecord *vbr = &(params->virtualBootRecord[i++]);
euca_strncpy(vbr->resourceLocation, kernelURL, sizeof(vbr->resourceLocation));
euca_strncpy(vbr->guestDeviceName, "none", sizeof(vbr->guestDeviceName));
euca_strncpy(vbr->id, kernelId, sizeof(vbr->id));
euca_strncpy(vbr->typeName, "kernel", sizeof(vbr->typeName));
vbr->sizeBytes = -1;
euca_strncpy(vbr->formatName, "none", sizeof(vbr->formatName));
params->virtualBootRecordLen++;
}
}
// legacy support for ramdisk{Id|URL}
if (ramdiskId && ramdiskURL) {
if (found_ramdisk) {
LOGINFO("[%s] IGNORING ramdisk %s passed outside the virtual boot record\n", instanceId, ramdiskId);
} else {
LOGINFO("[%s] LEGACY pre-VBR ramdisk id=%s URL=%s\n", instanceId, ramdiskId, ramdiskURL);
if (i == EUCA_MAX_VBRS) {
LOGERROR("[%s] out of room in the Virtual Boot Record for legacy ramdisk %s\n", instanceId, ramdiskId);
return EUCA_ERROR;
}
virtualBootRecord *vbr = &(params->virtualBootRecord[i++]);
euca_strncpy(vbr->resourceLocation, ramdiskURL, sizeof(vbr->resourceLocation));
euca_strncpy(vbr->guestDeviceName, "none", sizeof(vbr->guestDeviceName));
euca_strncpy(vbr->id, ramdiskId, sizeof(vbr->id));
euca_strncpy(vbr->typeName, "ramdisk", sizeof(vbr->typeName));
vbr->sizeBytes = -1;
euca_strncpy(vbr->formatName, "none", sizeof(vbr->formatName));
params->virtualBootRecordLen++;
}
}
return EUCA_OK;
}
//!
//!
//!
//! @param[in] a
//!
//! @pre
//!
//! @note
//!
static void update_vbr_with_backing_info(artifact * a)
{
assert(a);
if (a->vbr == NULL)
return;
virtualBootRecord *vbr = a->vbr;
assert(a->bb);
if (!a->must_be_file && // not required to be a file
strlen(blockblob_get_dev(a->bb)) && // there is a block device
blockblob_get_file(a->bb) == NULL && // there is NO file access
(blobstore_snapshot_t) a->bb->store->snapshot_policy != BLOBSTORE_SNAPSHOT_NONE) { // without snapshots we can use files
euca_strncpy(vbr->backingPath, blockblob_get_dev(a->bb), sizeof(vbr->backingPath));
vbr->backingType = SOURCE_TYPE_BLOCK;
} else {
assert(blockblob_get_file(a->bb));
euca_strncpy(vbr->backingPath, blockblob_get_file(a->bb), sizeof(vbr->backingPath));
vbr->backingType = SOURCE_TYPE_FILE;
}
vbr->sizeBytes = a->bb->size_bytes;
// create a symlink so backing file/dev is predictable regadless
// of whether the backing is a loopback dev or a device mapper dev
// or a file: this is needed for migration to work
{
const char *path = vbr->backingPath;
char bbdirpath[PATH_MAX];
blockblob_get_dir(a->bb, bbdirpath, sizeof(bbdirpath)); // fill in blob's base directory
char *linkname = "[invalid]";
if (!strcmp(vbr->guestDeviceName, "none")) {
linkname = vbr->typeName;;
} else {
linkname = vbr->guestDeviceName;
}
char linkpath[PATH_MAX];
snprintf(linkpath, sizeof(linkpath), "%s/link-to-%s", bbdirpath, linkname);
if (symlink(path, linkpath) == 0) {
LOGDEBUG("[%s] symlinked %s to %s\n", a->instanceId, path, linkpath);
euca_strncpy(vbr->backingPath, linkpath, sizeof(vbr->backingPath));
}
}
}
//!
//!
//!
//! @param[in] a
//!
//! @return
//!
//! @pre
//!
//! @note
//!
static int url_creator(artifact * a)
{
assert(a->bb);
assert(a->vbr);
virtualBootRecord *vbr = a->vbr;
const char *dest_path = blockblob_get_file(a->bb);
assert(vbr->preparedResourceLocation);
if (a->do_not_download) {
LOGINFO("[%s] skipping download of %s\n", a->instanceId, vbr->preparedResourceLocation);
return EUCA_OK;
}
LOGINFO("[%s] downloading %s\n", a->instanceId, vbr->preparedResourceLocation);
if (http_get(vbr->preparedResourceLocation, dest_path) != EUCA_OK) {
LOGERROR("[%s] failed to download component %s\n", a->instanceId, vbr->preparedResourceLocation);
return EUCA_ERROR;
}
return EUCA_OK;
}
//!
//! Creates an artifact by downloading it from Walrus
//!
//! @param[in] a
//!
//! @return
//!
//! @pre
//!
//! @note
//!
static int walrus_creator(artifact * a)
{
assert(a->bb);
assert(a->vbr);
virtualBootRecord *vbr = a->vbr;
const char *dest_path = blockblob_get_file(a->bb);
assert(vbr->preparedResourceLocation);
if (a->do_not_download) {
LOGINFO("[%s] skipping download of %s\n", a->instanceId, vbr->preparedResourceLocation);
return EUCA_OK;