tests/qemu-iotests/common.nbd

   1 #!/bin/bash
   2 # -*- shell-script-mode -*-
   3 #
   4 # Helpers for NBD server related config
   5 #
   6 # Copyright (C) 2018 Red Hat, Inc.
   7 #
   8 # This program is free software; you can redistribute it and/or modify
   9 # it under the terms of the GNU General Public License as published by
  10 # the Free Software Foundation; either version 2 of the License, or
  11 # (at your option) any later version.
  12 #
  13 # This program is distributed in the hope that it will be useful,
  14 # but WITHOUT ANY WARRANTY; without even the implied warranty of
  15 # MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  16 # GNU General Public License for more details.
  17 #
  18 # You should have received a copy of the GNU General Public License
  19 # along with this program.  If not, see <http://www.gnu.org/licenses/>.
  20 #
  21
  22 nbd_unix_socket="${TEST_DIR}/qemu-nbd.sock"
  23 nbd_tcp_addr="127.0.0.1"
  24 nbd_pid_file="${TEST_DIR}/qemu-nbd.pid"
  25
  26 nbd_server_stop()
  27 {
  28     local NBD_PID
  29     if [ -f "$nbd_pid_file" ]; then
  30         read NBD_PID < "$nbd_pid_file"
  31         rm -f "$nbd_pid_file"
  32         if [ -n "$NBD_PID" ]; then
  33             kill "$NBD_PID"
  34         fi
  35     fi
  36     rm -f "$nbd_unix_socket"
  37 }
  38
  39 nbd_server_wait_for_unix_socket()
  40 {
  41     pid=$1
  42
  43     for ((i = 0; i < 300; i++))
  44     do
  45         if [ -r "$nbd_unix_socket" ]; then
  46             return
  47         fi
  48         kill -s 0 $pid 2>/dev/null
  49         if test $? != 0
  50         then
  51             echo "qemu-nbd unexpectedly quit"
  52             exit 1
  53         fi
  54         sleep 0.1
  55     done
  56     echo "Failed in check of unix socket created by qemu-nbd"
  57     exit 1
  58 }
  59
  60 nbd_server_start_unix_socket()
  61 {
  62     nbd_server_stop
  63     $QEMU_NBD -v -t -k "$nbd_unix_socket" "$@" &
  64     nbd_server_wait_for_unix_socket $!
  65 }
  66
  67 nbd_server_set_tcp_port()
  68 {
  69     (ss --help) >/dev/null 2>&1 || _notrun "ss utility not found, skipping test"
  70
  71     for ((port = 10809; port <= 10909; port++))
  72     do
  73         if ! ss -tln | grep -sqE ":$port\b"; then
  74             nbd_tcp_port=$port
  75             return
  76         fi
  77     done
  78
  79     echo "Cannot find free TCP port for nbd in range 10809-10909"
  80     exit 1
  81 }
  82
  83 nbd_server_wait_for_tcp_socket()
  84 {
  85     pid=$1
  86
  87     for ((i = 0; i < 300; i++))
  88     do
  89         if ss -tln | grep -sqE ":$nbd_tcp_port\b"; then
  90             return
  91         fi
  92         kill -s 0 $pid 2>/dev/null
  93         if test $? != 0
  94         then
  95             echo "qemu-nbd unexpectedly quit"
  96             exit 1
  97         fi
  98         sleep 0.1
  99     done
 100     echo "Failed in check of TCP socket created by qemu-nbd"
 101     exit 1
 102 }
 103
 104 nbd_server_start_tcp_socket()
 105 {
 106     nbd_server_stop
 107     $QEMU_NBD -v -t -b $nbd_tcp_addr -p $nbd_tcp_port "$@" &
 108     nbd_server_wait_for_tcp_socket $!
 109 }