package/network/config/dsaconfig/files/dsaconfig.sh

   1 #!/bin/sh
   2
   3 . /lib/functions.sh
   4 . /lib/functions/network.sh
   5
   6 switch_names=""
   7
   8 warn() {
   9         echo "$@" >&2
  10 }
  11
  12 clear_port_vlans() {
  13         local port=$1
  14         local self=$2
  15         local vlans=$(bridge vlan show dev "$port" | sed -ne 's#^[^ ]* \+\([0-9]\+\).*$#\1#p')
  16
  17         local vlan
  18         for vlan in $vlans; do
  19                 bridge vlan del vid "$vlan" dev "$port" $self
  20         done
  21 }
  22
  23 lookup_switch() {
  24         local cfg=$1
  25         local swname
  26
  27         config_get swname "$cfg" switch
  28
  29         # Auto-determine switch if not specified ...
  30         if [ -z "$swname" ]; then
  31                 case "$switch_names" in
  32                         *\ *)
  33                                 warn "VLAN section '$cfg' does not specify a switch but multiple switches present, using first one"
  34                                 swname=${switch_names%% *}
  35                         ;;
  36                         *)
  37                                 swname=${switch_names}
  38                         ;;
  39                 esac
  40
  41         # ... otherwise check if the referenced switch is declared
  42         else
  43                 case " $switch_names " in
  44                         *" $swname "*) : ;;
  45                         *)
  46                                 warn "Switch '$swname' specified by VLAN section '$cfg' does not exist"
  47                                 return 1
  48                         ;;
  49                 esac
  50         fi
  51
  52         export -n "switch=$swname"
  53 }
  54
  55 validate_vid() {
  56         local vid=$1
  57
  58         case "$vid" in
  59                 [1-9]|[1-9][0-9]|[1-9][0-9][0-9]|[1-4][0-9][0-9][0-9])
  60                         if [ $vid -gt 4096 ]; then
  61                                 return 1
  62                         fi
  63                 ;;
  64                 *)
  65                         return 1
  66                 ;;
  67         esac
  68
  69         return 0
  70 }
  71
  72 setup_switch() {
  73         local cfg=$1
  74         local cpu
  75
  76         # Read configured CPU port from uci ...
  77         config_get cpu "$cfg" cpu_port
  78
  79         # ... if unspecified, find first CPU port
  80         if [ -z "$cpu" ]; then
  81                 local e
  82                 for e in /sys/class/net/*/dsa; do
  83                         if [ -d "$e" ]; then
  84                                 cpu=${e%/dsa}
  85                                 cpu=${cpu##*/}
  86                                 break
  87                         fi
  88                 done
  89         fi
  90
  91         # Bail out if we cannot determine the CPU port
  92         if [ -z "$cpu" ]; then
  93                 warn "Unable to determine CPU port for switch '$cfg'"
  94                 return 1
  95         fi
  96
  97         append switch_names "$cfg"
  98
  99         # Prevent netifd from picking up our switch bridge just yet
 100         network_defer_device "$cfg"
 101
 102         # Increase MTU of CPU port to 1508 to accomodate for VID + DSA tag
 103         ip link set "$cpu" mtu 1508
 104         ip link set "$cpu" up
 105
 106         # (Re)create switch bridge device in case it is not yet set up
 107         local filtering=$(cat "/sys/class/net/$cfg/bridge/vlan_filtering" 2>/dev/null)
 108         if [ ${filtering:-0} != 1 ]; then
 109                 ip link set "$cfg" down 2>/dev/null
 110                 ip link delete dev "$cfg" 2>/dev/null
 111                 ip link add name "$cfg" type bridge
 112                 echo 1 > "/sys/class/net/$cfg/bridge/vlan_filtering"
 113         fi
 114
 115         ip link set "$cfg" up
 116
 117         # Unbridge DSA ports and flush any VLAN filters on them, they're added back later
 118         local port
 119         for port in /sys/class/net/*"/upper_${cfg}"; do
 120                 if [ -e "$port" ]; then
 121                         port=${port%/upper_*}
 122                         port=${port##*/}
 123
 124                         ip link set "$port" nomaster
 125
 126                         # Unbridging the port should already clear VLANs, but be safe
 127                         clear_port_vlans "$port"
 128                 fi
 129         done
 130
 131         # Clear any VLANs on the switch bridge, they're added back later
 132         clear_port_vlans "$cfg" self
 133 }
 134
 135 setup_switch_vlan() {
 136         local cfg=$1
 137         local switch vlan ports
 138
 139         config_get switch "$cfg" switch
 140         config_get vlan "$cfg" vlan
 141         config_get ports "$cfg" ports
 142
 143         lookup_switch "$cfg" || return 1
 144         validate_vid "$vlan" || {
 145                 warn "VLAN section '$cfg' specifies an invalid VLAN ID '$vlan'"
 146                 return 1
 147         }
 148
 149         # Setup ports
 150         local port tag pvid
 151         for port in $ports; do
 152                 tag=${port#*.}
 153                 port=${port%.*}
 154                 pvid=
 155
 156                 if [ "$tag" != "$port" ] && [ "$tag" = t ]; then
 157                         tag=tagged
 158                 else
 159                         tag=untagged
 160                 fi
 161
 162                 # Add the port to the switch bridge and delete the default
 163                 # VLAN 1 if it is not yet joined to the switch.
 164                 if [ ! -e "/sys/class/net/$port/upper_$switch" ]; then
 165                         ip link set dev "$port" up
 166                         ip link set dev "$port" master "$switch"
 167
 168                         # Get rid of default VLAN 1
 169                         bridge vlan del vid 1 dev "$port"
 170                 fi
 171
 172                 # Promote the first untagged VLAN of this port to the PVID
 173                 if [ "$tag" = untagged ] && ! bridge vlan show dev "$port" | grep -qi pvid; then
 174                         pvid=pvid
 175                 fi
 176
 177                 # Add VLAN filter entry for port
 178                 bridge vlan add dev "$port" vid $vlan $pvid $tag
 179         done
 180
 181         # Make the switch bridge itself handle the VLAN as well
 182         bridge vlan add dev "$switch" self vid $vlan tagged
 183 }
 184
 185 setup_switch_port() {
 186         local cfg=$1
 187         local switch port pvid tag
 188
 189         config_get port "$cfg" port
 190         config_get pvid "$cfg" pvid
 191
 192         lookup_switch "$cfg" || return 1
 193         validate_vid "$pvid" || {
 194                 warn "Port section '$cfg' specifies an invalid PVID '$pvid'"
 195                 return 1
 196         }
 197
 198         # Disallow setting the PVID of the switch bridge itself
 199         [ "$port" != "$switch" ] || {
 200                 warn "Port section '$cfg' must not change PVID of the switch bridge"
 201                 return 1
 202         }
 203
 204         # Determine existing VLAN config
 205         local vlanspec=$(bridge vlan show dev "$port" vid "$pvid" 2>/dev/null | sed -ne2p)
 206         echo "$vlanspec" | grep -qi untagged && tag=untagged || tag=tagged
 207
 208         bridge vlan add vid "$pvid" dev "$port" pvid $tag
 209 }
 210
 211 apply_config() {
 212         config_load network
 213         config_foreach setup_switch dsa
 214
 215         # If no switch is explicitely declared, synthesize switch0
 216         if [ -z "$switch_names" ] && ! setup_switch switch0; then
 217                 warn "No DSA switches found"
 218                 return 1
 219         fi
 220
 221         config_foreach setup_switch_vlan dsa_vlan
 222         config_foreach setup_switch_port dsa_port
 223
 224         # Ready switch bridge devices
 225         local switch
 226         for switch in $switch_names; do
 227                 network_ready_device "$switch"
 228         done
 229 }
 230
 231 show_switch() {
 232         local switch=$1
 233
 234         printf "Switch: %s\n" "$switch"
 235         printf "VLAN/"
 236
 237         local port ports
 238         for port in "/sys/class/net/$switch/lower_"*; do
 239                 port=${port##*/lower_}
 240
 241
 242                 printf " | %-5s" "$port"
 243                 append ports "$port"
 244         done
 245
 246         printf " |\nLink:"
 247
 248         for port in $ports; do
 249                 local carrier=$(cat "/sys/class/net/$port/carrier")
 250                 local duplex=$(cat "/sys/class/net/$port/duplex")
 251                 local speed=$(cat "/sys/class/net/$port/speed")
 252
 253                 if [ ${carrier:-0} -eq 0 ]; then
 254                         printf " | %-5s" "down"
 255                 else
 256                         [ "$duplex" = "full" ] && duplex=F || duplex=H
 257                         printf " | %4d%s" "$speed" "$duplex"
 258                 fi
 259         done
 260
 261         local vlans=$(bridge vlan show dev "$switch" | sed -ne 's#^[^ ]* \+\([0-9]\+\).*$#\1#p')
 262         local vlan
 263         for vlan in $vlans; do
 264                 printf " |\n%4d " "$vlan"
 265
 266                 for port in $ports; do
 267                         local pvid="" utag="" word
 268                         for word in $(bridge vlan show dev "$port" vid "$vlan"); do
 269                                 case "$word" in
 270                                         PVID) pvid="*" ;;
 271                                         "$vlan") utag="t" ;;
 272                                         Untagged) utag="u" ;;
 273                                 esac
 274                         done
 275
 276                         printf " |  %-2s  " "$utag$pvid"
 277                 done
 278         done
 279
 280         printf " |\n\n"
 281 }
 282
 283 add_switch() {
 284         append switch_names "$1"
 285 }
 286
 287 show_config() {
 288         config_load network
 289         config_foreach add_switch dsa
 290
 291         local switch
 292         for switch in ${switch_names:-switch0}; do
 293                 show_switch "$switch"
 294         done
 295 }
 296
 297
 298 case "$1" in
 299         show) show_config ;;
 300         apply) apply_config ;;
 301         *)
 302                 echo "Usage: ${0##*/} show"
 303                 echo "       ${0##*/} apply"
 304                 exit 1
 305         ;;
 306 esac