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lantiq: create ATM/PTM interfaces with dsl as netdev name

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Renaming an atm etherbride using 'ip link' (via hotplug) is racy since the
original netdev might disappear before br2684ctl has finished appling it's
setting:

 local2.notice br2684ctl[1667]: Interface "nas0" created sucessfully
 local2.notice br2684ctl[1667]: Communicating over ATM 0.8.35, encapsulation: LLC
 kern.info kernel: dsl0: renamed from nas0
 kern.err kernel: br2684:br2684_regvcc: tried to attach to non-existent device
 local2.err br2684ctl[1667]: Could not configure interface:No such device or address

By passing the final used netdev name to br2684ctl_wrap another race
condition workaround will be enabled again.

Change the lantiq ptm driver to create a netdev with the name dsl as well.
Albeit the rename via 'ip link' works fine so far, using a different
approach for ptm then atm could be confusing.

Signed-off-by: Mathias Kresin <dev@kresin.me>
This commit is contained in:
Mathias Kresin 2018-01-06 17:30:38 +01:00
parent e4936a957d
commit d3fd38637f
4 changed files with 17 additions and 5 deletions
Show stats Download patch file Download diff file Expand all files Collapse all files

6
package/kernel/lantiq/ltq-ptm/src/ifxmips_ptm_adsl.c
View file

@ -254,7 +254,7 @@ static struct net_device_ops g_ptm_netdev_ops = {
#endif
static struct net_device *g_net_dev[2] = {0};
static char *g_net_dev_name[2] = {"ptm0", "ptmfast0"};
static char *g_net_dev_name[2] = {"dsl0", "dslfast0"};
#ifdef CONFIG_IFX_PTM_RX_TASKLET
static struct tasklet_struct g_ptm_tasklet[] = {
@ -927,8 +927,8 @@ static int proc_read_wanmib(char *page, char **start, off_t off, int count, int
int len = 0;
int i;
char *title[] = {
"ptm0\n",
"ptmfast0\n"
"dsl0\n",
"dslfast0\n"
};
for ( i = 0; i < ARRAY_SIZE(title); i++ ) {

2
package/kernel/lantiq/ltq-ptm/src/ifxmips_ptm_vdsl.c
View file

@ -121,7 +121,7 @@ static struct net_device_ops g_ptm_netdev_ops = {
};
static struct net_device *g_net_dev[1] = {0};
static char *g_net_dev_name[1] = {"ptm0"};
static char *g_net_dev_name[1] = {"dsl0"};
static int g_ptm_prio_queue_map[8];

2
target/linux/lantiq/base-files/etc/board.d/02_network
View file

@ -229,7 +229,7 @@ buffalo,wbmr-300hpd)
esac
ls /lib/modules/$(uname -r)/ltq_atm* 1> /dev/null 2>&1 && \
ucidef_add_atm_bridge "$vpi" "$vci" "$encaps" "$payload"
ucidef_add_atm_bridge "$vpi" "$vci" "$encaps" "$payload" "dsl"
if lantiq_is_vdsl_system; then
ucidef_add_vdsl_modem "$annex" "$tone" "$xfer_mode"

12
target/linux/lantiq/base-files/etc/uci-defaults/02_migrate_xdsl_iface
View file

@ -29,6 +29,17 @@ rename_xdsl_ifname()
IFNAME_CHANGED=1
}
add_atm_bridge_nameprefix()
{
local cfg="$1"
config_get nameprefix "$cfg" nameprefix
[ -z "$nameprefix" ] || return
uci set network.${cfg}.nameprefix="dsl"
IFNAME_CHANGED=1
}
migrate_network_xdsl_ifname()
{
rename_xdsl_ifname network "$1" ifname
@ -42,6 +53,7 @@ migrate_led_xdsl_ifname()
config_load network
config_foreach migrate_network_xdsl_ifname
config_foreach add_atm_bridge_nameprefix atm-bridge
[ "$IFNAME_CHANGED" = "1" ] && uci commit network