ctdb/config/nfs-linux-kernel-callout

   1 #!/bin/sh
   2
   3 # Exit on 1st error
   4 set -e
   5
   6 # Red Hat
   7 nfs_service="nfs"
   8 nfslock_service="nfslock"
   9 nfs_config="/etc/sysconfig/nfs"
  10
  11 # SUSE
  12 #nfs_service="nfsserver"
  13 #nfslock_service=""
  14 #nfs_config="/etc/sysconfig/nfs"
  15
  16 # Debian
  17 #nfs_service="nfs-kernel-server"
  18 #nfslock_service=""
  19 #nfs_config="/etc/default/nfs-kernel-server"
  20
  21 # Override for unit testing
  22 if [ -z "$PROCFS_PATH" ] ; then
  23     PROCFS_PATH="/proc"
  24 fi
  25
  26 ##################################################
  27
  28 usage ()
  29 {
  30     _c=$(basename $0)
  31     cat <<EOF
  32 usage: $_c { shutdown | startup }
  33        $_c { stop | start } { nfs | nlockmgr }
  34        $_c { monitor-list-shares | monitor-post }
  35        $_c { register }
  36 EOF
  37     exit 1
  38 }
  39
  40
  41 ##################################################
  42 # Basic service stop and start
  43
  44 basic_stop ()
  45 {
  46     case "$1" in
  47         nfs)
  48             service "$nfs_service" stop
  49             if [ -n "$nfslock_service" ] ; then
  50                 service "$nfslock_service" stop
  51             fi
  52             ;;
  53         nfslock)
  54             if [ -n "$nfslock_service" ] ; then
  55                 service "$nfslock_service" stop
  56             else
  57                 service "$nfs_service" stop
  58             fi
  59             ;;
  60         *)
  61             usage
  62     esac
  63 }
  64
  65 basic_start ()
  66 {
  67     case "$1" in
  68         nfs)
  69             if [ -n "$nfslock_service" ] ; then
  70                 service "$nfslock_service" start
  71             fi
  72             service "$nfs_service" start
  73             ;;
  74         nfslock)
  75             if [ -n "$nfslock_service" ] ; then
  76                 service "$nfslock_service" start
  77             else
  78                 service "$nfs_service" start
  79             fi
  80             ;;
  81         *)
  82             usage
  83     esac
  84 }
  85
  86 ##################################################
  87 # service "stop" and "start" options for restarting
  88
  89 service_stop ()
  90 {
  91     case "$1" in
  92         nfs)
  93             echo 0 >"${PROCFS_PATH}/fs/nfsd/threads"
  94             basic_stop "nfs" >/dev/null 2>&1 || true
  95             pkill -9 nfsd
  96             ;;
  97         nlockmgr)
  98             basic_stop "nfslock" >/dev/null 2>&1 || true
  99             ;;
 100         *)
 101             usage
 102     esac
 103 }
 104
 105 service_start ()
 106 {
 107     case "$1" in
 108         nfs)
 109             basic_start "nfs"
 110             ;;
 111         nlockmgr)
 112             basic_start "nfslock"
 113             ;;
 114         *)
 115             usage
 116     esac
 117 }
 118
 119 ##################################################
 120 # service init startup and final shutdown
 121
 122 nfs_shutdown ()
 123 {
 124     basic_stop "nfs"
 125 }
 126
 127 nfs_startup ()
 128 {
 129     basic_stop "nfs" || true
 130     basic_start "nfs"
 131     _f="${PROCFS_PATH}/sys/net/ipv4/tcp_tw_recycle"
 132     if [ "$_f" ] ; then
 133         echo 1 >"$_f"
 134     fi
 135 }
 136
 137 ##################################################
 138 # monitor-post support
 139
 140 nfs_check_thread_count ()
 141 {
 142     # Load NFS configuration to get desired number of threads.
 143     if [ -r "$nfs_config" ] ; then
 144         . "$nfs_config"
 145     fi
 146
 147     # If $RPCNFSDCOUNT/$USE_KERNEL_NFSD_NUMBER isn't set then we could
 148     # guess the default from the initscript.  However, let's just
 149     # assume that those using the default don't care about the number
 150     # of threads and that they have switched on this feature in error.
 151     _configured_threads="${RPCNFSDCOUNT:-${USE_KERNEL_NFSD_NUMBER}}"
 152     [ -n "$_configured_threads" ] || return 0
 153
 154     _threads_file="${PROCFS_PATH}/fs/nfsd/threads"
 155
 156     # nfsd should be running the configured number of threads.  If
 157     # there are a different number of threads then tell nfsd the
 158     # correct number.
 159     read _running_threads <"$_threads_file"
 160     # Intentionally not arithmetic comparison - avoids extra errors
 161     # when above fails...
 162     if [ "$_running_threads" != "$_configured_threads" ] ; then
 163         echo "Attempting to correct number of nfsd threads from ${_running_threads} to ${_configured_threads}"
 164         echo "$_configured_threads" >"$_threads_file"
 165     fi
 166 }
 167
 168 ##################################################
 169 # list share directories
 170
 171 nfs_monitor_list_shares ()
 172 {
 173     exportfs -v |
 174         grep '^/' |
 175         sed -e 's@[[:space:]][[:space:]]*[^[:space:]()][^[:space:]()]*([^[:space:]()][^[:space:]()]*)$@@' |
 176         sort -u
 177 }
 178
 179 ##################################################
 180
 181 nfs_register ()
 182 {
 183     cat <<EOF
 184 shutdown
 185 startup
 186 stop
 187 start
 188 monitor-list-shares
 189 monitor-post
 190 EOF
 191 }
 192
 193 ##################################################
 194
 195 case "$1" in
 196     shutdown)
 197         nfs_shutdown
 198         ;;
 199     startup)
 200         nfs_startup
 201         ;;
 202     stop)
 203         service_stop "$2"
 204         ;;
 205     start)
 206         service_start "$2"
 207         ;;
 208     monitor-list-shares)
 209         nfs_monitor_list_shares
 210         ;;
 211     monitor-post)
 212         nfs_check_thread_count
 213         ;;
 214     register)
 215         nfs_register
 216         ;;
 217     monitor-pre|releaseip|takeip)
 218         # Not required/implemented
 219         :
 220         ;;
 221     *)
 222         usage
 223 esac