This patch fixes bz1941106 and bz1941905 which passed empty rd.znet to the
kernel command line in the following cases,
- The IBM (Z15) KVM guest uses virtio for all devices including network
device, so there is no znet device for IBM KVM guest. So we can't
assume a s390x machine always has a znet device.
- When a bridged network is used, kexec-tools tries to obtain the znet
configuration from the ifcfg script of the bridged network rather than
from the ifcfg script of znet device.
We can iterate /sys/bus/ccwgroup/devices to tell if there if there is
a znet network device. By getting an ifname from znet, we can also avoid
mistaking the slave netdev as a znet network device in a bridged network
or bonded network.
Note: This patch also assumes there is only one znet device as commit
7148c0a30d ("add s390x netdev setup")
which greatly simplifies the code. According to IBM [1], there could be
more than znet devices for a z/VM system and a z/VM system may have a
non-znet network device like ConnectX. Since kdump_setup_znet was
introduced in 2012 and so far there is no known customer complaint that
invalidates this assumption I think it's safe to assume an IBM z/VM
system only has one znet device. Besides, there is no z/VM system found
on beaker to test the alternative scenarios.
[1] https://bugzilla.redhat.com/show_bug.cgi?id=1941905#c13
Signed-off-by: Coiby Xu <coxu@redhat.com>
Acked-by: Kairui Song <kasong@redhat.com>
The wrapper is introduced in commit 002337c, according to the commit
message, the only usage of the wrapper is when dracut-initqueue calls
"systemctl start emergency" directly. In that case, emergency
is started, but not in a isolation mode, which means dracut-initqueue
is still running. On the other hand, emergency will call
"systemctl start dracut-initqueue" again when default action is dump_to_rootfs.
systemd would block on the last dracut-initqueue, waiting for the first
instance to exit, which leaves us hang.
In previous commit we added initqueue status detect in dump_to_rootfs,
so now even without the wrapper, it will not hang.
And actually, previously, with the wrapper, emergency might still hang
for like 30s. When dracut called emergency service because initqueue
timed out, dump_to_rootfs will try start initqueue again and timeout
again. Now with the wrapper removed, we can avoid these two kinds of
hangs, bacause without the isolation we can detect initqueue service
status correctly in such case.
Also remove the invalid header comments in service file, the service
is not part of systemd code. And sync the service spec with dracut.
Signed-off-by: Kairui Song <kasong@redhat.com>
Acked-by: Coiby Xu <coxu@redhat.com>
This fixes bz1854037 which happens because kexec-tools generates rd.route for
eth0 instead of for kdump-eth0,
1. "rd.route=168.63.129.16:10.0.0.1:eth0 rd.route=169.254.169.254:10.0.0.1:eth0" is passed to the dracut cmdline by kexec-tools
2. In the 2rd kernel, dracut/modules.d/35network-manager/nm-config.sh calls
/usr/libexec/nm-initrd-generator to generate two .nmconnection files
based on the dracut cmdline, i.e. kdump-eth0.nmconnection and eth0.nmconnection,
- /run/NetworkManager/system-connections/kdump-eth0.nmconnection
[connection]
id=kdump-eth0
uuid=3ef53b1b-3908-437e-a15f-cf1f3ea2678b
type=ethernet
autoconnect-retries=1
interface-name=kdump-eth0
multi-connect=1
permissions=
wait-device-timeout=60000
[ethernet]
mac-address-blacklist=
[ipv4]
address1=10.0.0.4/24,10.0.0.1
dhcp-timeout=90
dns=168.63.129.16;
dns-search=
may-fail=false
method=manual
[ipv6]
addr-gen-mode=eui64
dhcp-timeout=90
dns-search=
method=disabled
[proxy]
- /run/NetworkManager/system-connections/eth0.nmconnection
[connection]
id=eth0
uuid=f224dc22-2891-4d7b-8f66-745029df4b53
type=ethernet
autoconnect-retries=1
interface-name=eth0
multi-connect=1
permissions=
[ethernet]
mac-address-blacklist=
[ipv4]
dhcp-timeout=90
dns=168.63.129.16;
dns-search=
method=auto
route1=168.63.129.16/32,10.0.0.1
route2=169.254.169.254/32,10.0.0.1
[ipv6]
addr-gen-mode=eui64
dhcp-timeout=90
dns-search=
method=auto
[proxy]
3. Since there's eth0.nmconnection, NetworkManager will try to get an IP for eth0 regardless of the fact it's a slave NIC and time out
```
$ ip link show
2: kdump-eth0: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc mq state UP mode DEFAULT group default qlen 1000
link/ether 00:0d:3a:11:86:8b brd ff:ff:ff:ff:ff:ff
3: eth0: <BROADCAST,MULTICAST,SLAVE,UP,LOWER_UP> mtu 1500 qdisc mq master kdump-eth0 state UP mode DEFAULT group default qlen 1000
```
Reported-by: Huijing Hei <hhei@redhat.com>
Signed-off-by: Coiby Xu <coxu@redhat.com>
Acked-by: Kairui Song <kasong@redhat.com>
This reverts commit 5633e83318.
vm.zone_reclaim_mode may cause trashing on some machines. And after
second thought, vm.zone_reclaim_mode is barely helpful for machines
with high mem stress, so just revert it.
Signed-off-by: Kairui Song <kasong@redhat.com>
Acked-by: Pingfan Liu <piliu@redhat.com>
This fix bz1854037 which happens because kexec-tools generates rd.route for
eth0 instead of for kdump-eth0,
1. "rd.route=168.63.129.16:10.0.0.1:eth0 rd.route=169.254.169.254:10.0.0.1:eth0" is passed to the dracut cmdline by kexec-tools
2. In the 2rd kernel,
- dracut/modules.d/40network/net-lib.sh will write /tmp/net.route.eth0 based on rd.route
- dracut/modules.d/45ifcfg/write-ifcfg.sh will copy /tmp/net.route.eth0 to /tmp/icfg and then copytree /tmp/ifcfg to /run/initramfs/state/etc/sysconfig/network-scripts
3. NetworkManager will try to get an IP for eth0 regardless of the fact it's a slave NIC and time out
```
$ ip link show
2: kdump-eth0: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc mq state UP mode DEFAULT group default qlen 1000
link/ether 00:0d:3a:11:86:8b brd ff:ff:ff:ff:ff:ff
3: eth0: <BROADCAST,MULTICAST,SLAVE,UP,LOWER_UP> mtu 1500 qdisc mq master kdump-eth0 state UP mode DEFAULT group default qlen 1000
```
Reported-by: Huijing Hei <hhei@redhat.com>
Signed-off-by: Coiby Xu <coxu@redhat.com>
Acked-by: Kairui Song <kasong@redhat.com
Recently, dracut-network drops depedency on dhcp-client which requires
ipcalc. Thus the dependency chain
"kexec-tools -> dracut-network -> dhcp-client -> ipcalc"
is broken. When NIC is configured to a static IP, kexec-tools depended
on "ipcalc -m" to get netmask. This commit implements the shell
equivalent of "ipcalc -m".
The following test code shows cal_netmask_by_prefix is consistent with
"ipcalc -m",
#!/bin/bash
. dracut-module-setup.sh
for i in {0..128}; do
mask_expected=$(ipcalc -m fe::/$i| cut -d"=" -f2)
mask_actual=$(cal_netmask_by_prefix $i "-6")
if [[ "$mask_expected" != "$mask_actual" ]]; then
echo "prefix="$i, "expected="$mask_expected, "acutal="$mask_actual
exit
fi
done
echo "IPv6 tests passed"
for i in {0..32}; do
mask_expected=$(ipcalc -m 8.8.8.8/$i| cut -d"=" -f2)
mask_actual=$(cal_netmask_by_prefix $i "")
if [[ "$mask_expected" != "$mask_actual" ]]; then
echo "prefix="$i, "expected="$mask_expected, "acutal="$mask_actual
exit
fi
done
echo "IPv4 tests passed"
i=-2
res=$(cal_netmask_by_prefix "$i" "")
if [[ $? -ne 1 ]]; then
echo "cal_netmask_by_prefix should exit when prefix<0"
exit
fi
res=$(cal_netmask_by_prefix "$i" "")
if [[ $? -ne 1 ]]; then
echo "cal_netmask_by_prefix should exit when prefix<0"
exit
fi
i=33
$(cal_netmask_by_prefix $i "")
if [[ $? -ne 1 ]]; then
echo "cal_netmask_by_prefix should exit when prefix>32 for IPv4"
exit
fi
i=129
$(cal_netmask_by_prefix $i "-6")
if [[ $? -ne 1 ]]; then
echo "cal_netmask_by_prefix should exit when prefix>128 for IPv4"
exit
fi
echo "Bad prefixes tests passed"
echo "All tests passed"
Reported-by: Jie Li <jieli@redhat.com>
Signed-off-by: Coiby Xu <coxu@redhat.com>
Acked-by: Kairui Song <kasong@redhat.com>
die (in dracut-lib.sh) is supposed to be used in the initramfs environment.
Signed-off-by: Coiby Xu <coxu@redhat.com>
Acked-by: Kairui Song <kasong@redhat.com>
On some large systems, /sys/devices is huge and it's not a wise idea to
iterate it. `find` may cause tremendous contention on the kernfs_mutex
when there are already stress on /sys, and it will perform very very
poorly.
Simply check if drm class presents should be good enough.
Signed-off-by: Kairui Song <kasong@redhat.com>
Acked-by: Pingfan Liu <piliu@redhat.com>
Also known as CVE-2021-20269. The kdump dmesg log files(kexec-dmesg.log,
vmcore-dmesg.txt) are generated by shell redirection, which take the
default umask value, making the files readable for group and others.
This patch chmod these files, making them only accessible to owner.
Signed-off-by: Tao Liu <ltao@redhat.com>
Acked-by: Kairui Song <kasong@redhat.com>
In fadump mode, it is also useful to observe kdump message through
console. Hence enable it.
Signed-off-by: Pingfan Liu <piliu@redhat.com>
Acked-by: Kairui Song <kasong@redhat.com>
There is no need to source the file manually, dracut will always
prepare the dracut lib before calling a module-setup.sh
Signed-off-by: Kairui Song <kasong@redhat.com>
Acked-by: Lianbo Jiang <lijiang@redhat.com>
systemctl -q --root "$initdir" add-wants X.target X.service is the
recommanded way to add service dependency, and it covers more corner
cases.
Signed-off-by: Kairui Song <kasong@redhat.com>
Acked-by: Pingfan Liu <piliu@redhat.com>
The parameter either6 is introduced to dracut by
commit 67354eebbcd4c358b8194ba5fd1ab1cf7dbd42aa
Author: Pingfan Liu <piliu@redhat.com>
Date: Tue Apr 24 16:41:21 2018 +0800
40network: introduce ip=either6 option
But it turns out needless.
On a sensible ipv6 network environment, DHCPv6 can not work properly alone,
because DHCPv6 protocol has no info about the gateway.
An reasonalbe process of ipv6 address set up should look like
host send: Router Solicitation
router reply: Router Advertisements
"Router Advertisements" carries many info like gateway, and if it has
other-config flag set, it carries DNS info etc. As for DHCPv6 address
allocation, it will only start if "Router Advertisements" has the 'managed'
flag set, which directs the host to start a stateful address allocation
from DHCPv6 server.
For more info:
rfc4861: Neighbor Discovery for IP version 6 (IPv6)
rfc5175: IPv6 Router Advertisement Flags Option
Signed-off-by: Pingfan Liu <piliu@redhat.com>
Acked-by: Kairui Song <kasong@redhat.com>
Dracut has switch network-legacy to network-manager by default, which makes
vlan on team easy. So it can be enabled.
Testing network topology with two VMs.
VM1
ens2-\ /----> VLAN8 (192.168.120.50)
---> team0
ens3-/ (192.168.122.10)
VM2
ens2-\ /----> VLAN8 (192.168.120.100)
---> team0
ens3-/ (192.168.122.20)
Both of ens2/ens3 in VM1/VM2 are connected to virbr0.
During test, dump target is set as root@192.168.120.100:/var/crash
then crashing in VM1
Signed-off-by: Pingfan Liu <piliu@redhat.com>
Acked-by: Lianbo Jiang <lijiang@redhat.com>
Let's add the rd.kdumploglvl option to control log level in the second
kernel, which can make us avoid rebuilding the kdump initramfs after we
change the log level in /etc/sysconfig/kdump.
Signed-off-by: Lianbo Jiang <lijiang@redhat.com>
Acked-by: Kairui Song <kasong@redhat.com>
depend() in module-setup.sh is a better place to setup dracut module
dependency, it will do early check, and fail early if needed module is
missing. Also remove a unneeded helper add_dracut_module.
Also remove the unnecessary return in depend() function.
Signed-off-by: Kairui Song <kasong@redhat.com>
Acked-by: Lianbo Jiang <lijiang@redhat.com>
The dracut module is opportunistic about using the built-in squashfs
support only when available, but the spec file hard requires it. Demote
it to a weak dep to truly make it optional.
This caters to environments which strive to stay minimal, like FCOS and
RHCOS. See https://github.com/coreos/fedora-coreos-config/pull/708 for
details.
Previously journalctl logs are directly dropped to save memory, but this
make journalctl unusable in kdump kernel and diffcult to debug. So
instead just don't let it read kmsg but keep other logs stored as volatile.
Kernel message are already stored in the kernel log ring buffer,
no need to let journalctl make a copy, especially when in kdump
kernel, ususlly there won't be too much kernel log overlapping
the old ring buffer.
Signed-off-by: Kairui Song <kasong@redhat.com>
Acked-by: Lianbo Jiang <lijiang@redhat.com>
Let's use the logger in the second kernel and collect the kernel ring
buffer(dmesg) of the second kernel.
Signed-off-by: Lianbo Jiang <lijiang@redhat.com>
Acked-by: Kairui Song <kasong@redhat.com>
If failure action is set to "shell", user will need more debug info
available in kdump kernel. Especially when serial console is not
available, manually retrieve the log from journalctl is very useful
for debugging kdump issue.
Else, we can still drop journalctl content to save memory assuming
nothing will use it.
Signed-off-by: Kairui Song <kasong@redhat.com>
Acked-by: Lianbo Jiang <lijiang@redhat.com>
Even if the directory "/etc/kdump/pre.d/" is empty, the following false
alarm can be observed during building kdump.initrd:
"/etc/kdump/pre.d/* is not executable"
Suppress it.
Signed-off-by: Pingfan Liu <piliu@redhat.com>
Acked-by: Kairui Song <kasong@redhat.com>
Dracut get_persistent_dev function don't recognize UUID= or LABEL=
format, so caller should conver it to the path to the block device
before calling it. There is already such a helper
"kdump_get_persistent_dev", just move it to kdump-lib.sh and rename
it to reuse it,
Signed-off-by: Kairui Song <kasong@redhat.com>
Acked-by: Dave Young <dyoung@redhat.com>
This patch installs the binary and script files under /etc/kdump/{pre.d,post.d}
into new initramfs of kdump.
Signed-off-by: Shinichi Onitsuka <onitsuka.shinic@fujitsu.com>
Acked-by: Pingfan Liu <piliu@redhat.com>
Switch root is never used for kdump image, and this will be helpful to
reduce the initramfs size.
Also increase dracut dependency version and the function is
dracut_no_switch_root is new introduced.
This commit is applied to RHEL some time ago, but missing in Fedora as
Fedora's Dracut didn't backport this feature at that time. Now apply
this missing commit.
Signed-off-by: Kairui Song <kasong@redhat.com>
Acked-by: Pingfan Liu <piliu@redhat.com>
Upstream dracut now use network-manager module by default and since
upstream commit 3dcaa97, network-manager expects user to pass "rd.neednet"
to indicate network is required.
Signed-off-by: Kairui Song <kasong@redhat.com>
Acked-by: Dave Young <dyoung@redhat.com>
This reverts commit cee618593c.
Upstream dracut have provided a parameter for adding mandantory network
requirement by appending "rd.neednet" parameter, so we should use that
instead.
Signed-off-by: Kairui Song <kasong@redhat.com>
Acked-by: Dave Young <dyoung@redhat.com>
In most cases, it always provides a persistent MAC address. But for
the s390 Arch, sometimes, kernel could run in the LPAR mode and it
doesn't provide a persistent MAC address, which caused the kdump
failure.
Currently, some rules rely on the persistent MAC address, for the
above case, which won't work in kdump kernel because non-persistent
MAC could not match with udev rules.
To fix this issue, need to add a new option 'rd.znet_ifname' in order
to provide extra parameters such as 'ifname' and 'subchannels' for
some rules, which ensures kdump can also work appropriately without
the persistent MAC. Please refer to the following commit in dracut:
872eb69936bd ("95znet: Add a rd.znet_ifname= option")
Signed-off-by: Lianbo Jiang <lijiang@redhat.com>
Acked-by: Kairui Song <kasong@redhat.com>
pcs cluster and cluster cib-upgrade may throw some information and disturb
the parsing. Mute them
Signed-off-by: Pingfan Liu <piliu@redhat.com>
Acked-by: Kairui Song <kasong@redhat.com>
There is a race issue between "pcs" and "kdumpctl restart"
-1. set up cluster
# pcs cluster setup --start mycluster node1 node2
# pcs stonith create kdump fence_kdump pcmk_reboot_action="off"
# pcs stonith level add 1 node1 kdump
# pcs stonith level add 1 node2 kdump
-2. Then here comes the command _immediately_ in kdumpctl
# pcs cluster cib
But due to some pcs internal mechanism, "pcs cluster cib" can not
fetch the updated info in time.
Fix these issue by forcing the upgrade of cib.
Signed-off-by: Pingfan Liu <piliu@redhat.com>
Acked-by: Kairui Song <kasong@redhat.com>
If user configured target is used, path should be used as the absolute
path within the dump target direct, and user should be fully aware of
the path structure within the target device. The adjust_bind_mount_path
call here make it very hard to control the behavior.
Especially, if it's a cross device bind mount, this will likely create a
invalid path in the target. And for atomic case, adjust_bind_mount_path call
here assumes user will always pass root device as the explicitly configured
dump target, which is not true.
If user configured target device is used, the path is always be the
absolute path inside of given target. If user don't know about the path
structure in the target device, then user should either use the path
based config, or carefully exam the target device before using it as a
dump target.
Signed-off-by: Kairui Song <kasong@redhat.com>
Acked-by: Lianbo Jiang <lijiang@redhat.com>
This commit remove almost all special workaround for atomic, and treat
all bind mounts in any environment equally.
Use a helper get_bind_mount_directory_from_path to get the bind mount
source path of given path.
is_atomic function now only used to determine the right /boot path
for atomic/silverblue environment.
And remove get_mntpoint_from_path(), it's the only function that never
ignore bind mount, and it have no caller after this clean up.
Signed-off-by: Kairui Song <kasong@redhat.com>
Acked-by: Lianbo Jiang <lijiang@redhat.com>
In /etc/hosts, the alias name can come at the 2nd column, regardless of the
recommendation.
E.g. the following format is valid although not recommended
cat /etc/hosts
127.0.0.1 localhost localhost.localdomain localhost4 localhost4.localdomain4
::1 localhost localhost.localdomain localhost6 localhost6.localdomain6
192.168.22.21 fastvm-rhel-7-6-21 fastvm-rhel-7-6-21.localdomain
192.168.22.22 fastvm-rhel-7-6-22 fastvm-rhel-7-6-22.localdomain
192.168.22.21 node1_hb
192.168.22.22 node2_hb
So filtering out both 2nd and 3rd column for matching.
Signed-off-by: Pingfan Liu <piliu@redhat.com>
Acked-by: Kairui Song <kasong@redhat.com>
Process substitution is not POSIX standard syntax, so if bash is configured
to strictly follow POSIC, this will fail.
Just use a POSIX friendly syntax instead.
Fixes: bz1708321
Signed-off-by: Kairui Song <kasong@redhat.com>
Acked-by: Lianbo Jiang <lijiang@redhat.com>
This help remove redundant spaces and tailing comment in installed
kdump.conf, currently installed kdump.conf always contain extra empty
lines.
Signed-off-by: Kairui Song <kasong@redhat.com>
Acked-by: Lianbo Jiang <lijiang@redhat.com>
Latest dracut release stopped creating
$systemdsystemunitdir/initrd.target.wants dir for us, so ensure it
exists before creating the symlink.
Signed-off-by: Kairui Song <kasong@redhat.com>
Tested-and-Reviewed-by: Bhupesh Sharma <bhsharma@redhat.com>
Currently while trying to save vmcore via vlan eth interface, the Kdump
kernel fails with network unreachable message.
This is because mkdumprd produces a vlan config that does not get
ip address for vlan on eth device.
Fix the same via this patch.
Signed-off-by: Bhupesh Sharma <bhsharma@redhat.com>
Acked-by: Kairui Song <kasong@redhat.com>
The dracut initqueue may quit immediately and won't trigger any hook if
there is no "finished" hook still pending (finished hook will be deleted
once it return 0).
This issue start to appear with latest dracut, latest dracut use
network-manager to configure the network,
network-manager module only install "settled" hook, and we didn't
install any other hook. So NFS/SSH dump will fail. iSCSI dump works
because dracut iscsi module will install a "finished" hook to detect if
the iscsi target is up.
So for NFS/SSH we keep initqueue running until the host successfully get
a valid IP address, which means the network is ready.
Signed-off-by: Kairui Song <kasong@redhat.com>
Acked-by: Pingfan Liu <piliu@redhat.com>
sed and awk is heavily used everywhere in the code, but it's not
explicitely installed by kdump dracut module. If the module in dracut
stop installing them (which already happened with latest dracut
upstream), kdump will break.
Signed-off-by: Kairui Song <kasong@redhat.com>
Acked-by: Pingfan Liu <piliu@redhat.com>
For ssh/nfs dump, kdump need the 'ip' tool to get the host ip address
for naming the vmcore. But kdump-module-setup.sh never installed this
tool. kdump-module-setup.sh worked so far as dracut network module will
help install it.
After dracut changed to use 35network-manager for network setup, "ip"
command won't be installed in second kernel by default. So need to
ensure "ip" is installed when installing kdump dracut module.
Signed-off-by: Kairui Song <kasong@redhat.com>
Acked-by: Pingfan Liu <piliu@redhat.com>
This help deduplicate the code. Use a single function instead of
repeat the same logic.
Signed-off-by: Kairui Song <kasong@redhat.com>
Acked-by: Pingfan Liu <piliu@redhat.com>
By default kernel have vm.zone_reclaim_mode = 0 and large page
allocation might fail as kernel is very conservative on memory
reclaiming. If the page allocation failure is not handled carefully
it could lead to more serious problems.
This issue can be reproduced by change with following steps:
- Fill up page cache use:
# dd if=/dev/urandom of=/test bs=1M count=1300
- Now the memory is filled with write cache:
# free -m
total used free shared buff/cache available
Mem: 1790 184 132 2 1473 1348
Swap: 2119 7 2112
- Insert a module which simply calls "kmalloc(SZ_1M, GFP_KERNEL)" for
512 times: (Notice: vmalloc don't have such problem)
# insmod debug_module.ko
- Got following allocation failure:
insmod: page allocation failure: order:8, mode:0x40cc0(GFP_KERNEL|__GFP_COMP), nodemask=(null),cpuset=/,mems_allowed=0
- Clean up and repeat again with vm.zone_reclaim_mode = 3, OOM is not
observed.
In kdump kernel there is usually only one online CPU and limited memory,
so we set vm.zone_reclaim_mode = 3 to let kernel reclaim memory more
aggresively to avoid such issue.
Signed-off-by: Kairui Song <kasong@redhat.com>
Acked-by: Pingfan Liu <piliu@redhat.com>
Merge kdump_setup_netdev into kdump_install_net.
kdump_install_net is a wrapper of calling kdump_setup_netdev, and
it do following three extra things:
1. Sanitize and resolve the hostname
2. Resolve the route to the destination
3. Set the default gateway for once
There is currently only one caller of kdump_setup_netdev, the iscsi
network setup code, and it's doing 1 and 2 by itself. And there should
only be one default gateway in kdump enviroment, so applying 3 here is
fine.
And the comment of kdump_install_net is wrong and obsoleted, update the
comment too.
Just merge kdump_setup_netdev into kdump_install_net and always use
kdump_install_net instead.
Signed-off-by: Kairui Song <kasong@redhat.com>
Acked-by: Pingfan Liu <piliu@redhat.com>
In commit a431a7e354 (module-setup: fix 99kdumpbase network dependency),
the statement for OR operation is still wrong.
The OR condition statement should be: if a || b
Signed-off-by: Pingfan Liu <piliu@redhat.com>
Acked-by: Kairui Song <kasong@redhat.com>
Bond options in ifcfg is space separated, dracut expected it to be comma
separated, so it have to be parsed and converted during initramfs
building.
The currently parsing and convert pattern is flawed, for example:
" downdelay=0 miimon=100 mode=802.3ad updelay=0 "
is converted to :
":,downdelay=0 miimon=100 mode=802.3ad updelay=0 "
should be:
":downdelay=0,miimon=100,mode=802.3ad,updelay=0"
So fix this issue by using more simple but robust method for processing
the options.
Signed-off-by: Kairui Song <kasong@redhat.com>
Acked-by: Dave Young <dyoung@redhat.com>
The localhost is filtered out in case of is_pcs_fence_kdump, do it too in
case of is_generic_fence_kdump.
Signed-off-by: Pingfan Liu <piliu@redhat.com>
Acked-by: Kairui Song <kasong@redhat.com>
'hostname -A' can not get the alias, meanwhile 'hostname -a' is deprecated.
So we should do it by ourselves.
The parsing is based on the format of /etc/hosts, i.e.
IP_address canonical_hostname [aliases...]
Signed-off-by: Pingfan Liu <piliu@redhat.com>
Acked-by: Kairui Song <kasong@redhat.com>
fadump will alter the normal boot initramfs and we don't want a normal
boot to foward and drop the journalctl logs.
Signed-off-by: Kairui Song <kasong@redhat.com>
Acked-by: Dave Young <dyoung@redhat.com>
The current code only exclude the hostname, while localhost can have alias in
/etc/hosts. All of the alias should be excluded from the fence dump node to
avoid deadlock issue.
Signed-off-by: Pingfan Liu <piliu@redhat.com>
Acked-by: Kairui Song <kasong@redhat.com>
Squash module is used to save memory. For fadump this is not neccessary
and may slow down the build time, and make it more fragile.
fadump initramfs is used for normal boot as well, although squash module
is capable of being used for generic normal boot, but there are cases
where is doesn't work well. So disable it and make fadump more robust.
Signed-off-by: Kairui Song <kasong@redhat.com>
Tested-by: Hari Bathini <hbathini@linux.ibm.com>
Acked-by: Dave Young <dyoung@redhat.com>
Don't use any log storage and forward to console directly, this make
console output more useful, and also save more memory. On a fresh
installed Fedora 30 it saved ~5M of memory, and the amount of log being
printed to console is still accetable.
Signed-off-by: Kairui Song <kasong@redhat.com>
Acked-by: Dave Young <dyoung@redhat.com>
When reading kdump configs, a single parsing should be enough and this
saves a lot of duplicated striping call which speed up the total load
speed.
Speed up about 2 second when building and 0.1 second for reload in my
tests.
Signed-off-by: Kairui Song <kasong@redhat.com>
Acked-by: Dave Young <dyoung@redhat.com>
When someone is using a minimal kernel without squash module installed,
including squash dracut module will either either fail to build or fail to
boot the initramfs.
As kdump always build the image for one single kernel, we can safely just
use modprobe to check if a modules is already built in, or it exists and
loadable for the kernel we are using for kdump image, and don't include
the squash module if they are missing. Everything will still work just
fine without squash module.
We do the check in kdump dracut modules not in squash dracut module
because kdump dracut module could leverage of the KDUMP_KERNELVER variable
to know which kernel it should check against, squash dracut module may be
used to build for a generic image.
And we only check for the kernel module dependency, other binary
dependencies are either well checked or well declared in dracut.
Signed-off-by: Kairui Song <kasong@redhat.com>
Acked-by: Dave Young <dyoung@redhat.com>
Currently we still don't support multipath route, when parsing multipath
route kdumpctl will wrongly consider 'nexthop' as the destination address,
and raise errors in second kernel.
When multipath route is in use, ip route output should be like this:
$ /sbin/ip route show
default via 192.168.122.1 dev ens1 proto dhcp metric 100
192.168.122.0/24 dev ens1 proto kernel scope link src 192.168.122.161 metric 100
192.168.122.8
nexthop via 192.168.122.1 dev ens1 weight 50
nexthop via 192.168.122.2 dev ens1 weight 5
As we don't care about HA/performance, simply use the rule with highest
weight and ignore the rest.
Signed-off-by: Kairui Song <kasong@redhat.com>
Acked-by: Baoquan He <bhe@redhat.com>
In dracut-049, a new squash module is introduced, it can reduce the
memory usage of kdump initramfs in the capture kernel, this helps a lot
on lowering the risk of OOM failure.
Tested with latest rawhide with NFS, SSH and local dump.
Signed-off-by: Kairui Song <kasong@redhat.com>
We test if to include the drm module or not by testing if there are any
drm entry in sysfs. But there is an exception for hyper-v, DRM module
take care of hyperv's framebuffer driver as well but hyperv_fb will
not create any drm entry. So currently we got black screen on
hyperv guest.
Fix by detect hyperv's special entry as well.
Signed-off-by: Kairui Song <kasong@redhat.com>
This commit basically reverts commit c755499fad,
and make use of new introduced tri-state hostonly mode.
Following dracut commits merged multipath-hostonly into multipath
module, and introduced a tri-state hostonly mode.
commit 35e86ac117acbfd699f371f163cdda9db0ebc047
Author: Kairui Song <kasong@redhat.com>
Date: Thu Jul 5 16:20:04 2018 +0800
Merge 90-multipath-hostonly and 90-multipath
commit a695250ec7db21359689e50733c6581a8d211215
Author: Kairui Song <kasong@redhat.com>
Date: Wed Jul 4 17:21:37 2018 +0800
Introduce tri-state hostonly mode
multipath-hostonly module was introduced only for kdump, because kdump
need a more strict hostonly policy for multipath device to save memory.
Now multipath module will provide the behave we wanted by setting
hostonly mode to strict.
Kdump always use _proto=dhcp for both ipv4 and ipv6. But for ipv6
the dhcp address assignment is not like ipv4, there are different ways
for it, stateless and stateful, see below document:
https://fedoraproject.org/wiki/IPv6Guide
In case stateless, kernel can do the address assignment, dracut use
_proto=auto6; for stateful case, dracut use _proto=dhcp6.
But it is hard to decide whether stateless or stateful takes effect,
hence, dracut introduces ip=either6 option, which can try both of these
method automatically for us. For detail, refer to dracut:
commit 67354ee 40network: introduce ip=either6 option
We do not see bug reports before because for the most auto6 cases
kernel assign ip address before dhclient, kdump just happened to work.
Signed-off-by: Pingfan Liu <piliu@redhat.com>
When using fence_kdump, module-setup will create a kdump.conf with
fence_kdump_nodes. The node name comes from the cluster xml, which may
use the hostname alias. Later in kdump stage, "fence_kdump_send alias_1
alias_2" sends out notification to peers. Hence it requires /etc/hosts
and nsswitch.conf to make alias work.
Signed-off-by: Pingfan Liu <piliu@redhat.com>
This reverts commit 2f4149f276.
It is not proved to be right to get auto6 or dhcpv6 in 1st kernel,
pingfan is working on a dracut fix to do some fallback in 2nd kernel initramfs.
So revert this commit
Kdump always use _proto=dhcp for both ipv4 and ipv6. But for ipv6
the dhcp address assignment is not like ipv4, there are different ways
for it, stateless and stateful, see below document:
https://fedoraproject.org/wiki/IPv6Guide
In case stateless, kernel can do the address assignment, dracut use
_proto=auto6; for stateful case, dracut use _proto=dhcp6.
We do not see bug reports before because for the most auto6 cases
kernel assign ip address before dhclient, kdump just happened to work.
Here we use auto6 if possible first. And we take the assumption that
host use auto6 if /proc/sys/net/ipv6/conf/$netdev/autoconf is enabled
Signed-off-by: Pingfan Liu <piliu@redhat.com>
Due to the following commit in dracut, which splits out hostonly modules
commit 5ce7cc7337a4c769b223152c083914f2052aa348
Author: Harald Hoyer <harald@redhat.com>
Date: Mon Jul 10 13:28:40 2017 +0200
add 90multipath-hostonly module
hardcoding the wwid of the drives in the initramfs causes problems
when the drives are cloned to a system with the same hardware, but
different disk wwid's
https://bugzilla.redhat.com/show_bug.cgi?id=1457311
So kdump should decide whether to include the hostonly module.
The multipath-hostonly can help kdump to include only the needed mpath device,
in order to use less memory by 2nd kernel.
---- The performance -----
before this patch
[root@localhost ~]# time kdumpctl start
Detected change(s) in the following file(s):
/etc/kdump.conf
Rebuilding /boot/initramfs-4.13.9-300.fc27.x86_64kdump.img
kexec: loaded kdump kernel
Starting kdump: [OK]
real 0m12.485s
user 0m10.096s
sys 0m1.887s
after this patch
root@localhost ~]# time kdumpctl start
Detected change(s) in the following file(s):
/etc/kdump.conf
Rebuilding /boot/initramfs-4.13.9-300.fc27.x86_64kdump.img
kexec: loaded kdump kernel
Starting kdump: [OK]
real 0m15.839s
user 0m13.015s
sys 0m1.853s
Signed-off-by: Pingfan Liu <piliu@redhat.com>
Acked-by: Dave Young <dyoung@redhat.com>
This commit eliminates a redundant kdump_get_mac_addr call in
kdump_setup_netdev.
Signed-off-by: Ziyue Yang <ziyang@redhat.com>
Acked-by: Dave Young <dyoung@redhat.com>
After adding "--hostonly-cmdline", besides 99kdump, 95iscsi
also generates iscsi related cmdline. IOW, we have duplicate
software iscsi cmdlines.
95iscsi generated software iscsi cmdline doesn't work, so we
remove that of 95iscsi and use that of 99kdump which has been
well tested.
We can change to use 95iscsi when possible in the future.
Signed-off-by: Xunlei Pang <xlpang@redhat.com>
Acked-by: Dave Young <dyoung@redhat.com>
Currently, we throw the error message at the very beginning, as
a result on a pure-hardware(all-offload) iscsi machine with many
iscsi partitions, we suffered from too much noise as follows:
iscsiadm: No records found
Unable to find iscsi record for
/sys/devices/pci0000:00/0000:00:06.0/0000:07:00.0/0000:08:01.1/host0/session1
iscsiadm: No records found
Unable to find iscsi record for
/sys/devices/pci0000:00/0000:00:06.0/0000:07:00.0/0000:08:01.3/host1/session2
iscsiadm: No records found
Unable to find iscsi record for
/sys/devices/pci0000:00/0000:00:06.0/0000:07:00.0/0000:08:01.1/host0/session1
iscsiadm: No records found
Unable to find iscsi record for
/sys/devices/pci0000:00/0000:00:06.0/0000:07:00.0/0000:08:01.3/host1/session2
iscsiadm: No records found
Unable to find iscsi record for
/sys/devices/pci0000:00/0000:00:06.0/0000:07:00.0/0000:08:01.1/host0/session1
iscsiadm: No records found
Unable to find iscsi record for
/sys/devices/pci0000:00/0000:00:06.0/0000:07:00.0/0000:08:01.3/host1/session2
iscsiadm: No records found
Unable to find iscsi record for
/sys/devices/pci0000:00/0000:00:06.0/0000:07:00.0/0000:08:01.1/host0/session1
iscsiadm: No records found
Unable to find iscsi record for
/sys/devices/pci0000:00/0000:00:06.0/0000:07:00.0/0000:08:01.3/host1/session2
iscsiadm: No records found
Unable to find iscsi record for
/sys/devices/pci0000:00/0000:00:06.0/0000:07:00.0/0000:08:01.1/host0/session1
iscsiadm: No records found
Unable to find iscsi record for
/sys/devices/pci0000:00/0000:00:06.0/0000:07:00.0/0000:08:01.3/host1/session2
kexec: loaded kdump kernel
Starting kdump: [OK]
There's no need to know the very early error messages, we can
remove the error output which is actually normal for the pure
hardware iscsi.
As for unexpected errors, we kept the error outputs in the
succeeding kdump_iscsi_get_rec_val() calls by not appending
"2>/dev/null".
Signed-off-by: Xunlei Pang <xlpang@redhat.com>
Acked-by: Dave Young <dyoung@redhat.com>
Currently, systemd uses 90s as the default mount unit timeout
(see "man 5 systemd-system.conf " for "DefaultTimeoutStartSec"),
in some cases, although it works well in 1st kernel, it's not
enough under kdump and results in mount timeout, further results
in kdump dumping failure.
We've met several such issues, we decided to enlarge this default
value a little for kdump.
We know that dracut has a default initqueue timeout value of 180s
("rd.retry"), we finalized a little larger value 300s as kdump's
default timeout if there is no explicit "DefaultTimeoutStartSec=X,
specified by users.
"DefaultTimeoutStartSec=X" can be overridden by individual mount
option "x-systemd.device-timeout=X", users can specify their own
values as needed.
This patch achieves the purpose by creating a dedicated conf file
"/etc/systemd/system.conf.d/kdump.conf" which has the content of
"DefaultTimeoutStartSec=300s", this is based on the fact that all
the conf files will be parsed by systemd and the last parsed one
will be used if there are duplicate definitions.
Signed-off-by: Xunlei Pang <xlpang@redhat.com>
Acked-by: Dave Young <dyoung@redhat.com>
I noticed that network is still enabled for local dumping,
like the following kdump boot message on my test machine
using local disk as the dump target:
tg3.c:v3.137 (May 11, 2014)
tg3 0000:02:00.0 eth2: Tigon3 [partno(BCM95720) rev
(PCI Express) MAC address c8:1f:66:c9:35:0d
tg3 0000:02:00.0 eth2: attached PHY is 5720C
After some debugging, found it due to a misuse in code below:
if [ is_generic_fence_kdump -o is_pcs_fence_kdump ]; then
_dep="$_dep network"
fi
The "if" condition always results in "true", and should be
changed as follows:
if is_generic_fence_kdump -o is_pcs_fence_kdump; then
_dep="$_dep network"
fi
After this, network won't be involved in non-network dumping,
as for dumpings require network such as nfs/ssh/iscsi/fcoe/etc,
dracut will add network accordingly. And kdump initramfs size
can be reduced from 24MB to 17MB tested on some real hardware,
and from 19MB to 14MB on my kvm. Moreover, it could avoid the
network (driver) initialization thereby saving us more memory.
Signed-off-by: Xunlei Pang <xlpang@redhat.com>
Acked-by: Dave Young <dyoung@redhat.com>
The /sys/modules/*/drivers sysfs entries do not exist anymore on newer
kernels which means that the DRM moduels would never be included.
Instead check if there is any device with a "drm" sysfs directory to
decide on whether DRM modules need to be included.
Acked-by: Dave Young <dyoung@redhat.com>
Since the current dracut of Fedora already supports not always
mounting root device, we can remove "root=X" from the command
line directly, and always get the dump target specified in
"/etc/kdump.conf" and mount it. If the dump target is located
at root filesystem, we will add the root mount info explicitly
from kdump side instead of from dracut side.
For example, in case of nfs/ssh/usb/raw/etc(non-root) dumping,
kdump will not mount the unnecessary root fs after this change.
This patch removes "root=X" via the "KDUMP_COMMANDLINE_REMOVE"
(if "default dump_to_rootfs" is specified, don't remove "root=X"),
and mounts non-root target under "/kdumproot", the root target
still under "/sysroot"(to be align with systemd sysroot.mount).
After removing "root=X", we now add root fs mount information
explicitly from the kdump side.
Changed check_dump_fs_modified() a little to avoid rebuild when
dump target is root, since we add root fs mount explicitly now.
Signed-off-by: Xunlei Pang <xlpang@redhat.com>
Acked-by: Pratyush Anand <panand@redhat.com>
Acked-by:Dave Young <dyoung@redhat.com>
We met a problem that the kdump emergency service failed to
start when the target dump timeout(we passed "rd.timeout=30"
to kdump), it reported "Transaction is destructive" messages:
[ TIME ] Timed out waiting for device dev-mapper-fedora\x2droot.device.
[DEPEND] Dependency failed for Initrd Root Device.
[ SKIP ] Ordering cycle found, skipping System Initialization
[DEPEND] Dependency failed for /sysroot.
[DEPEND] Dependency failed for Initrd Root File System.
[DEPEND] Dependency failed for Reload Configuration from the Real Root.
[ SKIP ] Ordering cycle found, skipping System Initialization
[ SKIP ] Ordering cycle found, skipping Initrd Default Target
[DEPEND] Dependency failed for File System Check on /dev/mapper/fedora-root.
[ OK ] Reached target Initrd File Systems.
[ OK ] Stopped dracut pre-udev hook.
[ OK ] Stopped dracut cmdline hook.
Starting Setup Virtual Console...
Starting Kdump Emergency...
[ OK ] Reached target Initrd Default Target.
[ OK ] Stopped dracut initqueue hook.
Failed to start kdump-error-handler.service: Transaction is destructive.
See system logs and 'systemctl status kdump-error-handler.service' for details.
[FAILED] Failed to start Kdump Emergency.
See 'systemctl status emergency.service' for details.
[DEPEND] Dependency failed for Emergency Mode.
This is because in case of root failure, initrd-root-fs.target
will trigger systemd emergency target which requires the systemd
emergency service actually is kdump-emergency.service, then our
kdump-emergency.service starts kdump-error-handler.service with
"systemctl isolate"(see 99kdumpbase/kdump-emergency.service, we
replace systemd's with this one under kdump).
This will lead to systemd two contradictable jobs queued as an
atomic transaction:
job 1) the emergency service gets started by initrd-root-fs.target
job 2) the emergency service gets stopped due to "systemctl isolate"
thereby throwing "Transaction is destructive".
In order to solve it, we can utilize "IgnoreOnIsolate=yes" for both
kdump-emergency.service and kdump-emergency.target. Unit with attribute
"IgnoreOnIsolate=yes" won't be stopped when isolating another unit,
they can keep going as expected in case be triggered by any failure.
We add kdump-emergency.target dedicated to kdump the similar way
as did for kdump-emergency.service(i.e. will replace systemd's
emergency.target with kdump-emergency.target under kdump), and
adds "IgnoreOnIsolate=yes" into both of them.
Signed-off-by: Xunlei Pang <xlpang@redhat.com>
Acked-by: Dave Young <dyoung@redhat.com>
Acked-by: Pratyush Anand <panand@redhat.com>
[bhe: improve the patch log about IgnoreOnIsolate="]
We replace "reserved_memory = XXXX"(default value is 8192) with
"reserved_memory = 1024" in /etc/lvm/lvm.conf used by "lvm2", it
can save 7MB peak memory consumption, so lower the possibility of
OOM under kdump.
For kdump, we don't have too many lvm targets, lvm2 locates in the
RAM(rootfs), so don't need that much memory, as discussed with lvm
people, they agreed that we use 1MB under kdump as long as there
are not that many lvm targets invloved.
We modify /etc/lvm/lvm.conf when "99kdumpbase" install() is executed,
because it is parsed after "90lvm" by dracut.
We add the code unconditionally with &>/dev/null to ignore errors, it
doesn't matter in case of "lvm" not included(i.e. there is no lvm.conf).
Signed-off-by: Xunlei Pang <xlpang@redhat.com>
Acked-by: Dave Young <dyoung@redhat.com>
kdump_to_udev_name function name cause confusion to people, change it to
kdump_get_persistent_dev which sounds better.
Signed-off-by: Dave Young <dyoung@redhat.com>
Reviewed-by: Xunlei Pang <xlpang@redhat.com>
Although we use by-id in mkdumprd as persistent policy for the dump target
checking, finally it is not used in kdump 2nd kernel because we call dracut
function in module-setup.sh without persistent policy specified that means
kdump will copy default "by-uuid" dev name.
Though by-uuid usually works and it is still better to fix it as raw disk
uuid make no sense.
Also do not need to call bind mount adjust function for raw dump, here add
another switch case for raw dump and cleanup the functions with short
variable names to keep code shorter.
Signed-off-by: Dave Young <dyoung@redhat.com>
Reviewed-by: Xunlei Pang <xlpang@redhat.com>
When a remote dump target is specified, kdump dracut module prefixes
'kdump-' to network interface name (ifname) as kernel assigned names
are not persistent. In fadump mode, kdump dracut module is added to
the default initrd, which adds the 'kdump-' prefix to the ifname of
the prodcution kernel itself. If fadump mode is disabled after this,
kdump dracut module picks the ifname that is already prefixed with
'kdump-' in the production kernel and adds another 'kdump-' to it,
making the ifname something like kdump-kdump-eth0 for kdump kernel.
Eventually, kdump kernel fails with below traces:
dracut-initqueue[246]: RTNETLINK answers: Network is unreachable
dracut-initqueue[246]: arping: Device kdump-kdump-eth0 not available.
The ip command shows the below:
kdump:/# ip addr show kdump-kdump-eth0
2: kdump-kdump-eth: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 \
qdisc pfifo_fast state UNKNOWN qlen 1000
link/ether 22:82:87:7b:98:02 brd ff:ff:ff:ff:ff:ff
inet6 2002:903:15f:550:2082:87ff:fe7b:9802/64 scope global \
mngtmpaddr dynamic
valid_lft 2591890sec preferred_lft 604690sec
inet6 fe80::2082:87ff:fe7b:9802/64 scope link
valid_lft forever preferred_lft forever
kdump:/#
The trailing 0 from kdump-kdump-eth0 is missing in the ifname, probably
truncated owing to ifname length limit, while setting.
This patch fixes this by avoiding addition of the prefix 'kdump-' when
such prefix is already present in the ifname.
Signed-off-by: Hari Bathini <hbathini@linux.vnet.ibm.com>
Acked-by: Dave Young <dyoung@redhat.com>
There are some complaints about nfs kdump that users must mount
nfs beforehand, which may cause some overhead to nfs server.
For example, there're thounsands of diskless clients deployed with
nfs dumping, each time the client is boot up, it will trigger
kdump rebuilding so will mount nfs, thus resulting in thousands
of nfs request concurrently imposed on the same nfs server.
We introduce a new way of specifying mount information via the
already-existent "dracut_args" directive(so avoid adding extra
directives in /etc/kdump.conf), we will skip all the filesystem
mounting and checking stuff for it. So it can be used in the
above-mentioned nfs scenario to avoid severe nfs server overhead.
Specifically, if there is any "--mount" information specified via
"dracut_args" in /etc/kdump.conf, always use it as the final mount
without any validation(mounting or checking like mount options,
fs size, etc), so users are expected to ensure its correctness.
NOTE:
-Only one mount target is allowed using "dracut_args" globally.
-Dracut will create <mountpoint> if it doesn't exist in kdump kernel,
<mountpoint> must be specified as an absolute path.
-Users should do a test first and ensure it works because kdump does
not prepare the mount or check all the validity.
Reviewed-by: Pratyush Anand <panand@redhat.com>
Suggested-by: Dave Young <dyoung@redhat.com>
Acked-by: Dave Young <dyoung@redhat.com>
Signed-off-by: Xunlei Pang <xlpang@redhat.com>
Now dracut takes care to add module for active watchdog. Therefore we do
not need to pass iTCO_wdt and lpc_ich module in rd.driver.pre specifically
here.
Signed-off-by: Pratyush Anand <panand@redhat.com>
Acked-by: Dave Young <dyoung@redhat.com>
There are several kinds of iSCSI mode rhel support currently.
- Pure hardware iSCSI
- iBFT iSCSI
- Pure software iSCSI
Except for the 1st one that firmware takes care of everything to
make it behave like a local disk, both iBFT and pure software iSCSI
mode need pass information to kdump kernel for configuring them
correctly.
Currently kdump takes iBFT mode as a software iSCSI and collects
the related information to set up software iSCSI in 2nd kernel,
though dracut can detect and collect information to set up iBFT
iSCSI of 2nd kernel. This brings up 2 problems:
1) Redundent information about the related iSCSI is collected. One
is done by kdump, the other is from dracut.
2) These 2 sessions of 2nd kernel for a certain session of 1st kernel
could contain two "ip=xxx" cmdline option. This will cause cmdline
handling error in dracut.
The 1st one is not critical while the 2nd is. In order to avoid above
2 problems, kdump need detect iBFT mode iSCSI and leave it to dracut.
This is what is done in this patch.
Signed-off-by: Baoquan He <bhe@redhat.com>
Acked-by: Xunlei Pang <xlpang@redhat.com>
Acked-by: Dave Young <dyoung@redhat.com>
The ifcfg file name of <netif> under "/etc/sysconfig/network-scripts/"
may not be "ifcfg-<netif>". For example, for "enp0s25" we are able to
generate its ifcfg like "/etc/sysconfig/network-scripts/ifcfg-enp0s25test"
via network-manager. If we alway assume "ifcfg-<netif>" is there, we will
got the wrong result in some cases.
The issue can be resolved by using the new get_ifcfg_filename() introduced
by PATCH "kdump-lib: Add get_ifcfg_filename() to get the proper ifcfg file",
so we hereby change all the "ifcfg-<netif>" users to use get_ifcfg_filename().
Signed-off-by: Xunlei Pang <xlpang@redhat.com>
Acked-by: Dave Young <dyoung@redhat.com>
dracut will place the config in the random path during generating the
initramfs. Remove the duplicate prefix path ${initdir}.
Signed-off-by: Minfei Huang <mhuang@redhat.com>
Acked-by: Dave Young <dyoung@redhat.com>
The system may have multiple default route entry. Following is an
example to show the details.
# ip -6 route list dev eth0
2620:52:0:1040::/64 proto kernel metric 256 expires 2591978sec fe80::/64 proto kernel metric 256
default via fe80:52:0:1040::1 proto ra metric 1024 expires 1778sec hoplimit 64
default via fe80:52:0:1040::2 proto ra metric 1024 expires 1778sec hoplimit 64
Choose the first matched entry.
Signed-off-by: Minfei Huang <mhuang@redhat.com>
Acked-by: Baoquan He <bhe@redhat.com>
Dracut will die in the situation that dracut detects to use dhcp to
setup ip address, but kdump passes the ip address to it.
In commit 7ea50dc7a3, we start to use
option permanent to get the ip address in kdump_static_ip. If the
network is setuped by static, we will get the ip address, otherwise
getting none.
In commit c994a80698 which it used to
support ipv6 protocol, I miss the option permanent.
This patch is not a fixing patch, just pulls back something to make
kdump work as original.
Signed-off-by: Minfei Huang <mhuang@redhat.com>
Acked-by: Dave Young <dyoung@redhat.com>
Due to the different format between ipv4 and ipv6 protocol, quote the
ipv6 address with bracket "[]" to make dracut notify.
Signed-off-by: Minfei Huang <mhuang@redhat.com>
Acked-by: Dave Young <dyoung@redhat.com>
Kdump will parse the hostname to get the ip address, if hostname is
specfied in /etc/kdump.conf. We will get the ip address(ipv4 or ipv6,
according to the DNS server) by using "getent hosts".
For now, it is more reasonable that we shall get all of the ip
address(including ipv4 and ipv6 address) which point to the hostname by
using "getent ahosts". And we will prefer to use the ipv4 address, if
both ipv4 and ipv6 address work.
The reason why we choose the ipv4 as preferred address is to solve the
issue kdump will fail to connect the hostname machine(parsed as ipv6
address), due to the DNS server is ipv4 address in 2nd kernel.
Signed-off-by: Minfei Huang <mhuang@redhat.com>
Acked-by: Dave Young <dyoung@redhat.com>
Previously, Kdump will save route to setup the network route in the 2nd
kernel for ipv4 protocol. To support ipv6 protocol, make Kdump fetch
correct nexthop, since the ruturning format is different.
In order to enhance kdump to support ipv6, support the static ip for
ipv6 protocol, which ipv4 has supported already.
Introduce a new lib function get_remote_host which is used to factor out
the ip address(ipv4 or ipv6) and hostname in /etc/kdump.conf.
Introduce a new lib function is_ipv6_address which is used to make sure
whether the passed ip address is ipv4 or ipv6.
Introduce a new lib function is_hostname which is used to confirm
whether the passed parameter is hostname, not the ip address.
Introduce a new function get_ip_route_field which is used to factor out
the specified string in ip route info.
Due to the different format between ipv4 and ipv6 protocol, quote the
ipv6 address with bracket "[]" to make dracut notify.
Signed-off-by: Minfei Huang <mhuang@redhat.com>
Acked-by: Dave Young <dyoung@redhat.com>
For now, Kdump will use ipv4 address as dump directory, and it works, if
ipv4 is enabled.
Once Kdump start to support ipv6 protocol, we may only setup the ipv6
address exclusively. Modify the code to make Kdump work in either ipv4
and ipv6 protocol.
Signed-off-by: Minfei Huang <mhuang@redhat.com>
Acked-by: Dave Young <dyoung@redhat.com>
Coiby Xu
Kairui Song
Tao Liu
Pingfan Liu
Lianbo Jiang
Jonathan Lebon
onitsuka.shinic@fujitsu.com
Bhupesh Sharma
Dave Young
Ziyue Yang
Xunlei Pang
Benjamin Berg
Hari Bathini
Pratyush Anand
Baoquan He
Xunlei Pang
Minfei Huang