/* * Copyright (C) 2005 Anthony Liguori * * Network Block Device * * 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; under version 2 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 . */ #include "qemu/osdep.h" #include "qapi/error.h" #include "qemu-common.h" #include "qemu/cutils.h" #include "sysemu/block-backend.h" #include "block/block_int.h" #include "block/nbd.h" #include "qemu/main-loop.h" #include "qemu/error-report.h" #include "qemu/config-file.h" #include "block/snapshot.h" #include "qapi/util.h" #include "qapi/qmp/qstring.h" #include "qom/object_interfaces.h" #include "io/channel-socket.h" #include "crypto/init.h" #include #include #include #define SOCKET_PATH "/var/lock/qemu-nbd-%s" #define QEMU_NBD_OPT_CACHE 256 #define QEMU_NBD_OPT_AIO 257 #define QEMU_NBD_OPT_DISCARD 258 #define QEMU_NBD_OPT_DETECT_ZEROES 259 #define QEMU_NBD_OPT_OBJECT 260 #define QEMU_NBD_OPT_TLSCREDS 261 #define QEMU_NBD_OPT_IMAGE_OPTS 262 static NBDExport *exp; static bool newproto; static int verbose; static char *srcpath; static SocketAddress *saddr; static int persistent = 0; static enum { RUNNING, TERMINATE, TERMINATING, TERMINATED } state; static int shared = 1; static int nb_fds; static QIOChannelSocket *server_ioc; static int server_watch = -1; static QCryptoTLSCreds *tlscreds; static void usage(const char *name) { (printf) ( "Usage: %s [OPTIONS] FILE\n" "QEMU Disk Network Block Device Server\n" "\n" " -h, --help display this help and exit\n" " -V, --version output version information and exit\n" "\n" "Connection properties:\n" " -p, --port=PORT port to listen on (default `%d')\n" " -b, --bind=IFACE interface to bind to (default `0.0.0.0')\n" " -k, --socket=PATH path to the unix socket\n" " (default '"SOCKET_PATH"')\n" " -e, --shared=NUM device can be shared by NUM clients (default '1')\n" " -t, --persistent don't exit on the last connection\n" " -v, --verbose display extra debugging information\n" " -x, --export-name=NAME expose export by name\n" "\n" "Exposing part of the image:\n" " -o, --offset=OFFSET offset into the image\n" " -P, --partition=NUM only expose partition NUM\n" "\n" "General purpose options:\n" " --object type,id=ID,... define an object such as 'secret' for providing\n" " passwords and/or encryption keys\n" #ifdef __linux__ "Kernel NBD client support:\n" " -c, --connect=DEV connect FILE to the local NBD device DEV\n" " -d, --disconnect disconnect the specified device\n" "\n" #endif "\n" "Block device options:\n" " -f, --format=FORMAT set image format (raw, qcow2, ...)\n" " -r, --read-only export read-only\n" " -s, --snapshot use FILE as an external snapshot, create a temporary\n" " file with backing_file=FILE, redirect the write to\n" " the temporary one\n" " -l, --load-snapshot=SNAPSHOT_PARAM\n" " load an internal snapshot inside FILE and export it\n" " as an read-only device, SNAPSHOT_PARAM format is\n" " 'snapshot.id=[ID],snapshot.name=[NAME]', or\n" " '[ID_OR_NAME]'\n" " -n, --nocache disable host cache\n" " --cache=MODE set cache mode (none, writeback, ...)\n" " --aio=MODE set AIO mode (native or threads)\n" " --discard=MODE set discard mode (ignore, unmap)\n" " --detect-zeroes=MODE set detect-zeroes mode (off, on, unmap)\n" " --image-opts treat FILE as a full set of image options\n" "\n" "Report bugs to \n" , name, NBD_DEFAULT_PORT, "DEVICE"); } static void version(const char *name) { printf( "%s version 0.0.1\n" "Written by Anthony Liguori.\n" "\n" "Copyright (C) 2006 Anthony Liguori .\n" "This is free software; see the source for copying conditions. There is NO\n" "warranty; not even for MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.\n" , name); } struct partition_record { uint8_t bootable; uint8_t start_head; uint32_t start_cylinder; uint8_t start_sector; uint8_t system; uint8_t end_head; uint8_t end_cylinder; uint8_t end_sector; uint32_t start_sector_abs; uint32_t nb_sectors_abs; }; static void read_partition(uint8_t *p, struct partition_record *r) { r->bootable = p[0]; r->start_head = p[1]; r->start_cylinder = p[3] | ((p[2] << 2) & 0x0300); r->start_sector = p[2] & 0x3f; r->system = p[4]; r->end_head = p[5]; r->end_cylinder = p[7] | ((p[6] << 2) & 0x300); r->end_sector = p[6] & 0x3f; r->start_sector_abs = le32_to_cpup((uint32_t *)(p + 8)); r->nb_sectors_abs = le32_to_cpup((uint32_t *)(p + 12)); } static int find_partition(BlockBackend *blk, int partition, off_t *offset, off_t *size) { struct partition_record mbr[4]; uint8_t data[512]; int i; int ext_partnum = 4; int ret; if ((ret = blk_read(blk, 0, data, 1)) < 0) { error_report("error while reading: %s", strerror(-ret)); exit(EXIT_FAILURE); } if (data[510] != 0x55 || data[511] != 0xaa) { return -EINVAL; } for (i = 0; i < 4; i++) { read_partition(&data[446 + 16 * i], &mbr[i]); if (!mbr[i].system || !mbr[i].nb_sectors_abs) { continue; } if (mbr[i].system == 0xF || mbr[i].system == 0x5) { struct partition_record ext[4]; uint8_t data1[512]; int j; if ((ret = blk_read(blk, mbr[i].start_sector_abs, data1, 1)) < 0) { 
---

schema: "yardstick:task:0.1"

description: >
    Yardstick TC076 config file;
    Monitor network metrics provided by the kernel in a host and calculate
    IP datagram error rate, ICMP message error rate, TCP segment error rate and
    UDP datagram error rate.

{% set provider = provider or none %}
{% set physical_network = physical_network or 'physnet1' %}
{% set segmentation_id = segmentation_id or none %}

scenarios:
-
  type: Ping
  run_in_background: true
  options:
    packetsize: 200

  host: demeter.yardstick-TC076
  target: poseidon.yardstick-TC076

-
  type: Nstat
  options:
    duration: 300

  host: poseidon.yardstick-TC076

  runner:
    type: Iteration
    iterations: 1

  sla:
    IP_datagram_error_rate: 0.01
    action: monitor

context:
  name: yardstick-TC076
  image: yardstick-image
  flavor: yardstick-flavor
  user: ubuntu

  placement_groups:
    pgrp1:
      policy: "availability"

  servers:
    demeter:
      floating_ip: true
      placement: "pgrp1"
    poseidon:
      floating_ip: true
      placement: "pgrp1"

  networks:
    test:
      cidr: '10.0.1.0/24'
      {% if provider == "vlan" %}
      provider: {{provider}}
      physical_network: {{physical_network}}
        {% if segmentation_id %}
      segmentation_id: {{segmentation_id}}
        {% endif %}
      {% endif %}
mu_opts_foreach(&qemu_object_opts, user_creatable_add_opts_foreach, NULL, NULL)) { exit(EXIT_FAILURE); } if (tlscredsid) { if (sockpath) { error_report("TLS is only supported with IPv4/IPv6"); exit(EXIT_FAILURE); } if (device) { error_report("TLS is not supported with a host device"); exit(EXIT_FAILURE); } if (!export_name) { /* Set the default NBD protocol export name, since * we *must* use new style protocol for TLS */ export_name = ""; } tlscreds = nbd_get_tls_creds(tlscredsid, &local_err); if (local_err) { error_report("Failed to get TLS creds %s", error_get_pretty(local_err)); exit(EXIT_FAILURE); } } if (disconnect) { int nbdfd = open(argv[optind], O_RDWR); if (nbdfd < 0) { error_report("Cannot open %s: %s", argv[optind], strerror(errno)); exit(EXIT_FAILURE); } nbd_disconnect(nbdfd); close(nbdfd); printf("%s disconnected\n", argv[optind]); return 0; } if (device && !verbose) { int stderr_fd[2]; pid_t pid; int ret; if (qemu_pipe(stderr_fd) < 0) { error_report("Error setting up communication pipe: %s", strerror(errno)); exit(EXIT_FAILURE); } /* Now daemonize, but keep a communication channel open to * print errors and exit with the proper status code. */ pid = fork(); if (pid < 0) { error_report("Failed to fork: %s", strerror(errno)); exit(EXIT_FAILURE); } else if (pid == 0) { close(stderr_fd[0]); ret = qemu_daemon(1, 0); /* Temporarily redirect stderr to the parent's pipe... */ dup2(stderr_fd[1], STDERR_FILENO); if (ret < 0) { error_report("Failed to daemonize: %s", strerror(errno)); exit(EXIT_FAILURE); } /* ... close the descriptor we inherited and go on. */ close(stderr_fd[1]); } else { bool errors = false; char *buf; /* In the parent. Print error messages from the child until * it closes the pipe. */ close(stderr_fd[1]); buf = g_malloc(1024); while ((ret = read(stderr_fd[0], buf, 1024)) > 0) { errors = true; ret = qemu_write_full(STDERR_FILENO, buf, ret); if (ret < 0) { exit(EXIT_FAILURE); } } if (ret < 0) { error_report("Cannot read from daemon: %s", strerror(errno)); exit(EXIT_FAILURE); } /* Usually the daemon should not print any message. * Exit with zero status in that case. */ exit(errors); } } if (device != NULL && sockpath == NULL) { sockpath = g_malloc(128); snprintf(sockpath, 128, SOCKET_PATH, basename(device)); } saddr = nbd_build_socket_address(sockpath, bindto, port); if (qemu_init_main_loop(&local_err)) { error_report_err(local_err); exit(EXIT_FAILURE); } bdrv_init(); atexit(bdrv_close_all); srcpath = argv[optind]; if (imageOpts) { QemuOpts *opts; if (fmt) { error_report("--image-opts and -f are mutually exclusive"); exit(EXIT_FAILURE); } opts = qemu_opts_parse_noisily(&file_opts, srcpath, true); if (!opts) { qemu_opts_reset(&file_opts); exit(EXIT_FAILURE); } options = qemu_opts_to_qdict(opts, NULL); qemu_opts_reset(&file_opts); blk = blk_new_open(NULL, NULL, options, flags, &local_err); } else { if (fmt) { options = qdict_new(); qdict_put(options, "driver", qstring_from_str(fmt)); } blk = blk_new_open(srcpath, NULL, options, flags, &local_err); } if (!blk) { error_reportf_err(local_err, "Failed to blk_new_open '%s': ", argv[optind]); exit(EXIT_FAILURE); } bs = blk_bs(blk); blk_set_enable_write_cache(blk, !writethrough); if (sn_opts) { ret = bdrv_snapshot_load_tmp(bs, qemu_opt_get(sn_opts, SNAPSHOT_OPT_ID), qemu_opt_get(sn_opts, SNAPSHOT_OPT_NAME), &local_err); } else if (sn_id_or_name) { ret = bdrv_snapshot_load_tmp_by_id_or_name(bs, sn_id_or_name, &local_err); } if (ret < 0) { error_reportf_err(local_err, "Failed to load snapshot: "); exit(EXIT_FAILURE); } bs->detect_zeroes = detect_zeroes; fd_size = blk_getlength(blk); if (fd_size < 0) { error_report("Failed to determine the image length: %s", strerror(-fd_size)); exit(EXIT_FAILURE); } if (partition != -1) { ret = find_partition(blk, partition, &dev_offset, &fd_size); if (ret < 0) { error_report("Could not find partition %d: %s", partition, strerror(-ret)); exit(EXIT_FAILURE); } } exp = nbd_export_new(blk, dev_offset, fd_size, nbdflags, nbd_export_closed, &local_err); if (!exp) { error_report_err(local_err); exit(EXIT_FAILURE); } if (export_name) { nbd_export_set_name(exp, export_name); newproto = true; } server_ioc = qio_channel_socket_new(); if (qio_channel_socket_listen_sync(server_ioc, saddr, &local_err) < 0) { object_unref(OBJECT(server_ioc)); error_report_err(local_err); return 1; } if (device) { int ret; ret = pthread_create(&client_thread, NULL, nbd_client_thread, device); if (ret != 0) { error_report("Failed to create client thread: %s", strerror(ret)); exit(EXIT_FAILURE); } } else { /* Shut up GCC warnings. */ memset(&client_thread, 0, sizeof(client_thread)); } nbd_update_server_watch(); /* now when the initialization is (almost) complete, chdir("/") * to free any busy filesystems */ if (chdir("/") < 0) { error_report("Could not chdir to root directory: %s", strerror(errno)); exit(EXIT_FAILURE); } state = RUNNING; do { main_loop_wait(false); if (state == TERMINATE) { state = TERMINATING; nbd_export_close(exp); nbd_export_put(exp); exp = NULL; } } while (state != TERMINATED); blk_unref(blk); if (sockpath) { unlink(sockpath); } qemu_opts_del(sn_opts); if (device) { void *ret; pthread_join(client_thread, &ret); exit(ret != NULL); } else { exit(EXIT_SUCCESS); } }