#!/bin/bash
# This example script creates bonding network devices based on synthetic NIC
# (the virtual network adapter usually provided by Hyper-V) and the matching
# VF NIC (SRIOV virtual function). So the synthetic NIC and VF NIC can
# function as one network device, and fail over to the synthetic NIC if VF is
# down.
#
# Usage:
# - After configured vSwitch and vNIC with SRIOV, start Linux virtual
# machine (VM)
# - Run this scripts on the VM. It will create configuration files in
# distro specific directory.
# - Reboot the VM, so that the bonding config are enabled.
#
# The config files are DHCP by default. You may edit them if you need to change
# to Static IP or change other settings.
#
sysdir=/sys/class/net
netvsc_cls={f8615163-df3e-46c5-913f-f2d2f965ed0e}
bondcnt=0
# Detect Distro
if [ -f /etc/redhat-release ];
then
cfgdir=/etc/sysconfig/network-scripts
distro=redhat
elif grep -q 'Ubuntu' /etc/issue
then
cfgdir=/etc/network
distro=ubuntu
elif grep -q 'SUSE' /etc/issue
then
cfgdir=/etc/sysconfig/network
distro=suse
else
echo "Unsupported Distro"
exit 1
fi
echo Detected Distro: $distro, or compatible
# Get a list of ethernet names
list_eth=(`cd $sysdir && ls -d */ | cut -d/ -f1 | grep -v bond`)
eth_cnt=${#list_eth[@]}
echo List of net devices:
# Get the MAC addresses
for (( i=0; i < $eth_cnt; i++ ))
do
list_mac[$i]=`cat $sysdir/${list_eth[$i]}/address`
echo ${list_eth[$i]}, ${list_mac[$i]}
done
# Find NIC with matching MAC
for (( i=0; i < $eth_cnt-1; i++ ))
do
for (( j=i+1; j < $eth_cnt; j++ ))
do
if [ "${list_mac[$i]}" = "${list_mac[$j]}" ]
then
list_match[$i]=${list_eth[$j]}
break
fi
done
done
function create_eth_cfg_redhat {
local fn=$cfgdir/ifcfg-$1
rm -f $fn
echo DEVICE=$1 >>$fn
echo TYPE=Ethernet >>$fn
echo BOOTPROTO=none >>$fn
echo UUID=`uuidgen` >>$fn
echo ONBOOT=yes >>$fn
echo PEERDNS=yes >>$fn
echo IPV6INIT=yes >>$fn
echo MASTER=$2 >>$fn
echo SLAVE=yes >>$fn
}
function create_eth_cfg_pri_redhat {
create_eth_cfg_redhat $1 $2
}
function create_bond_cfg_redhat {
local fn=$cfgdir/ifcfg-$1
rm -f $fn
echo DEVICE=$1 >>$fn
echo TYPE=Bond >>$fn
echo BOOTPROTO=dhcp >>$fn
echo UUID=`uuidgen` >>$fn
echo ONBOOT=yes >>$fn
echo PEERDNS=yes >>$fn
echo IPV6INIT=yes >>$fn
echo BONDING_MASTER=yes >>$fn
echo BONDING_OPTS=\"mode=active-backup miimon=100 primary=$2\" >>$fn
}
function create_eth_cfg_ubuntu {
local fn=$cfgdir/interfaces
echo $'\n'auto $1 >>$fn
echo iface $1 inet manual >>$fn
echo bond-master $2 >>$fn
}
function create_eth_cfg_pri_ubuntu {
local fn=$cfgdir/interfaces
create_eth_cfg_ubuntu $1 $2
echo bond-primary $1 >>$fn
}
function create_bond_cfg_ubuntu {
local fn=$cfgdir/interfaces
echo $'\n'auto $1 >>$fn
echo iface $1 inet dhcp >>$fn
echo bond-mode active-backup >>$fn
echo bond-miimon 100 >>$fn
echo bond-slaves none >>$fn
}
function create_eth_cfg_suse {
local fn=$cfgdir/ifcfg-$1
rm -f $fn
echo BOOTPROTO=none >>$fn
echo STARTMODE=auto >>$fn
}
function create_eth_cfg_pri_suse {
create_eth_cfg_suse $1
}
function create_bond_cfg_suse {
local fn=$cfgdir/ifcfg-$1
rm -f $fn
echo BOOTPROTO=dhcp >>$fn
echo STARTMODE=auto >>$fn
echo BONDING_MASTER=yes >>$fn
echo BONDING_SLAVE_0=$2 >>$fn
echo BONDING_SLAVE_1=$3 >>$fn
echo BONDING_MODULE_OPTS=\'mode=active-backup miimon=100 primary=$2\' >>$fn
}
function create_bond {
local bondname=bond$bondcnt
local primary
local secondary
local class_id1=`cat $sysdir/$1/device/class_id 2>/dev/null`
local class_id2=`cat $sysdir/$2/device/class_id 2>/dev/null`
if [ "$class_id1" = "$netvsc_cls" ]
then
primary=$2
secondary=$1
elif [ "$class_id2" = "$netvsc_cls" ]
then
primary=$1
secondary=$2
else
return 0
fi
echo $'\nBond name:' $bondname
echo configuring $primary
create_eth_cfg_pri_$distro $primary $bondname
echo configuring $secondary
create_eth_cfg_$distro $secondary $bondname
echo creating: $bondname with primary slave: $primary
create_bond_cfg_$distro $bondname $primary $secondary
let bondcnt=bondcnt+1
}
for (( i=0; i < $eth_cnt-1; i++ ))
do
if [ -n "${list_match[$i]}" ]
then
create_bond ${list_eth[$i]} ${list_match[$i]}
fi
done
>6
drm/i915: Check for NULL i915_vma in intel_unpin_fb_obj()
I've seen this trigger twice now, where the i915_gem_object_to_ggtt()
call in intel_unpin_fb_obj() returns NULL, resulting in an oops
immediately afterwards as the (inlined) call to i915_vma_unpin_fence()
tries to dereference it.
It seems to be some race condition where the object is going away at
shutdown time, since both times happened when shutting down the X
server. The call chains were different:
- VT ioctl(KDSETMODE, KD_TEXT):
intel_cleanup_plane_fb+0x5b/0xa0 [i915]
drm_atomic_helper_cleanup_planes+0x6f/0x90 [drm_kms_helper]
intel_atomic_commit_tail+0x749/0xfe0 [i915]
intel_atomic_commit+0x3cb/0x4f0 [i915]
drm_atomic_commit+0x4b/0x50 [drm]
restore_fbdev_mode+0x14c/0x2a0 [drm_kms_helper]
drm_fb_helper_restore_fbdev_mode_unlocked+0x34/0x80 [drm_kms_helper]
drm_fb_helper_set_par+0x2d/0x60 [drm_kms_helper]
intel_fbdev_set_par+0x18/0x70 [i915]
fb_set_var+0x236/0x460
fbcon_blank+0x30f/0x350
do_unblank_screen+0xd2/0x1a0
vt_ioctl+0x507/0x12a0
tty_ioctl+0x355/0xc30
do_vfs_ioctl+0xa3/0x5e0
SyS_ioctl+0x79/0x90
entry_SYSCALL_64_fastpath+0x13/0x94
- i915 unpin_work workqueue:
intel_unpin_work_fn+0x58/0x140 [i915]
process_one_work+0x1f1/0x480
worker_thread+0x48/0x4d0
kthread+0x101/0x140
and this patch purely papers over the issue by adding a NULL pointer
check and a WARN_ON_ONCE() to avoid the oops that would then generally
make the machine unresponsive.
Other callers of i915_gem_object_to_ggtt() seem to also check for the
returned pointer being NULL and warn about it, so this clearly has
happened before in other places.
[ Reported it originally to the i915 developers on Jan 8, applying the
ugly workaround on my own now after triggering the problem for the
second time with no feedback.
This is likely to be the same bug reported as
https://bugs.freedesktop.org/show_bug.cgi?id=98829
https://bugs.freedesktop.org/show_bug.cgi?id=99134
which has a patch for the underlying problem, but it hasn't gotten to
me, so I'm applying the workaround. ]
Cc: Daniel Vetter <daniel.vetter@intel.com>
Cc: Jani Nikula <jani.nikula@linux.intel.com>
Cc: Ville Syrjälä <ville.syrjala@linux.intel.com>
Cc: Chris Wilson <chris@chris-wilson.co.uk>
Cc: Maarten Lankhorst <maarten.lankhorst@linux.intel.com>
Cc: Tvrtko Ursulin <tvrtko.ursulin@intel.com>
Cc: Imre Deak <imre.deak@intel.com>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to 'tools/testing/selftests/ftrace/test.d/template')