Currently in the whole kdump framework, we have some common functions
used across not only mkdumprd context and dracut context, but also 1st
kernel and 2nd kernel. We defined these functions at each script, which
is obviously not decent.
So let's introduce kdump-lib.sh for the shared functions and put it
to /lib/kdump/kdump-lib.sh.
It starts small, as you can see, only 3 functions are extracted. But in
the future more and more common functions can be added.
Signed-off-by: WANG Chao <chaowang@redhat.com>
Acked-by: Vivek Goyal <vgoyal@redhat.com>
In kdump_setup_bridge/bond/team(), we use _dev as a global variable.
That causes following issues when network is br0 over bond0:
-> kdump_setup_bridge br0: _dev to be "bond0" as a brif
-> kdump_setup_bond bond0: _dev is modified to be eth0 as a bond slave
-> (jump back) kdump_setup_bridge br0: we really need _dev is
"bond0" not "eth0".
_dev must be a local variable because it has been used multiple places.
Signed-off-by: WANG Chao <chaowang@redhat.com>
Acked-by: Vivek Goyal <vgoyal@redhat.com>
Acked-by: Dave Young <dyoung@redhat.com>
Chaowang measured the selinux load_policy memory usage, it need ~50M
It's too much under kdump 2nd kernel, it cause more OOM then before.
Here is the findings from Vivek:
- If we don't load policy or don't do restorecon, kernel automatically
uses a label for file as specified by file
/sys/fs/selinux/initial_contexts/file
On my system this value is "system_u:object_r:file_t:s0". Kernel
enforces this label on a file if it is not labeled. That's the reason
that you see above label on vmcore file when selinux policy was not
loaded in second kernel or restorecon was not done.
Note: I did some testing with rhel6 and there also I see file_t context.
Not sure why that's the case.
- Relabeling of root file system over boot happens if there is a file
/.autorelabel present. This file is touched by systemd service
fedora-autorelabel-mark.service. And this file comes from initscritps
package.
So if this service thinks that system was booted with selinux disabled
it will put this file on root and when next time system boots with
selinux enabled, relabeling is enforced by fedora-autorelabel.service
service.
- In our case relabeling is not happening after saving vmcore because
there does not seem be any fedora-autorelabel-mark.service running
from initramfs context. Looks like this service runs after switching
to real root.
Aug 08 10:44:13 vm9-f19 systemd[1]: Started Mark the need to relabel after reboot.
- selinux poicy is now loaded by systemd after root switch has taken
place.
Aug 08 10:44:10 vm9-f19 systemd[1]: Successfully loaded SELinux policy in 357.693ms.
So now we know that why selinux relabeling is not taking place. Reason
being that systemd service which marks the file system for autorelabeling
does not run from initramfs context.
And it might not make to run this service from initramfs context before
switch root. In general it makes sense to first switch to root, load
selinux policy if needed and then check whether to mark this filesystem
for relabel or not. Ideally root is mourted read only before that. It is
just that we break this rule for kdump. So as long as we make sure we
relabel files created by kdump after booting back, things should be fine.
Since we will relabel the vmcore dir after reboot so let's remove
the selinux dracut module dependency to avoid load_policy in 2nd kernel.
If in the future load_policy memory usage shrinks to an acceptable level
or there's a better solution we can add selinux load_policy back later.
Signed-off-by: Dave Young <dyoung@redhat.com>
Acked-by: Vivek Goyal <vgoyal@redhat.com>
Currently in initrd, hardware clock is always considered to use UTC time
format and system time zone is also UTC. Thus system time isn't correct
if hw clock is localtime or we're using other time zone in real root.
To fix this, install /etc/adjtime and /etc/localtime to initrd.
Previously, this functionality was implemented in dracut base module:
commit 77364fd
Author: WANG Chao <chaowang@redhat.com>
base: setup correct system time and time zone in initrd
But some people complains about a normal boot initrd needs to rebuild
every time if time zone is changed. So let's fix it on our side.
Signed-off-by: WANG Chao <chaowang@redhat.com>
Acked-by: Vivek Goyal <vgoyal@redhat.com>
Currently when action_on_fail is enabled, the emergency_shell won't be called
either. In kdump even though user specify the default action as emergency_shell,
dracut still skip it. Now change the implementation of action_on_fail to depend
on a file which is created by kdump when making kdump initrd, then remove it
at the beginning of kdump. This can solve the explicit emergency_shell problem.
Signed-off-by: Baoquan He <bhe@redhat.com>
Acked-by: Vivek Goyal <vgoyal@redhat.com>
Acked-by: WANG Chao <chaowang@redhat.com>
When directory is empty, echo * will output *, not empty string. That's
not intended.
Also it looks a little bit nicer now.
Signed-off-by: WANG Chao <chaowang@redhat.com>
Acked-by: Baoquan He <bhe@redhat.com>
kernel has exported mac address for each interface, we can get it
directly instead of parsing the output from ip address show.
Signed-off-by: WANG Chao <chaowang@redhat.com>
Acked-by: Baoquan He <bhe@redhat.com>
Currently we use runtime mac addr to 2nd kernel to setup bonding
interface. But Bonding master will modify its slaves' mac addr and
incorrect mac addr is passed to 2nd kernel. Thus dracut in 2nd kernel
can't find expected slaves and bonding will fail.
Fix this issue by using perm address.
Tested in Fedora 19 KVM guest configured bonding with two slaves.
Signed-off-by: WANG Chao <chaowang@redhat.com>
Acked-by: Baoquan He <bhe@redhat.com>
When 1st kernel is using KMS and crash, 2nd kernel can't reset to
nomodeset and the screen is black. In this case, user can't observe the
boot/dump progress and run commands in shell.
So let's pull in drm dracut module to fix this.
Signed-off-by: WANG Chao <chaowang@redhat.com>
Acked-by: Baoquan He <bhe@redhat.com>
depends on 98selinux if 1st kernel selinux is enabled so we can load_policy
and correctly label the vmcore/vmcore-dmesg files.
Since dracut always mount rootfs, the 98selinux will chroot and load_policy,
so this will be ok for Fedora. In case rootfs mount failure we have to check
and relable vmcore files, will add the kdumpctl relabeling code in another
patch.
add 'dracut_args --printsize' to /etc/kdump.conf, it shows below added size:
selinux install size: 16k
Tested on F19:
With this patch applied, vmcore selinux attr is ok.
v1->v2: use sestatus 2>/dev/null to mute error messages
Signed-off-by: Dave Young <dyoung@redhat.com>
Acked-by: Vivek Goyal <vgoyal@redhat.com>
In kdump.conf, space key is used as delimiter by default.
In kdump_install_conf of dracut-module-setup.sh, if specify
core_collector with a tab delimiter, the tool may not be
copied into kdump-initrd.
E.g, core_collector scp -v
And in dump_ssh of dracut-kdump.sh, dumping will fail caused
by tab key in core_collector.
Here change code to allow tab key as delimiter when specifying
core_collector.
Signed-off-by: Baoquan He <bhe@redhat.com>
Acked-by: Vivek Goyal <vgoyal@redhat.com>
Save vmcore-dmesg.txt before saving vmcore. For ssh targets, it assumes
that ssh is enabled. No scp logic as I don't have a local copy of
kernel log buffers and saving one will consume extra memory. We
can possibly enhance this logic to save kernel log buffers first locally
and then scp it (For setups which allow scp but disable ssh access).
(log is from Vivek Goyal <vgoyal@redhat.com>)
And add 1 section to describe it in kexec-kdump-howto.txt
v3->v4:
Remove old description of dmesg in kexec-kdump-howto.txt, now
add a new section to describe it, and note user kernel log
buffers won't be available if dump target is raw device.
Signed-off-by: Baoquan He <bhe@redhat.com>
Acked-by: Vivek Goyal <vgoyal@redhat.com>
Currently we overwrite 40ip.conf to make ip and ifname both at the first
line. But getarg() of dracut doesn't have the limitation that all
cmdline args should be at the first line. Therefore, we can remove the
overwrite safely.
After applying this patch, in 2nd kernel,
kdump:/# cat /etc/cmdline.d/40ip.conf
ip=eth0:dhcp
ifname=eth0:52:54:00:b2:98:05
kdump:/# source /usr/lib/dracut/dracut-lib.sh
kdump:/# getarg ip
ip=eth0:dhcp
kdump:/# getarg ifname
ifname=eth0:52:54:00:b2:98:05
Signed-off-by: WANG Chao <chaowang@redhat.com>
Acked-by: Baoquan He <bhe@redhat.com>
Kdump module doesn't check if bridge is stack on other complex interface
and setup proper dracut cmdline. That makes dracut fail to setup a working
network environment in 2nd kernel.
This patch adds the ability to setup proper dracut cmdline for bridge over
bond/team/vlan. Although in this timeframe, drauct only supports bridge over
bond among these three complex network, it's worth fixing the other two types
(bridge over team/vlan) along with. It would be much easier for us once
the dracut part is done.
Signed-off-by: WANG Chao <chaowang@redhat.com>
Acked-by: Baoquan He <bhe@redhat.com>
drauct takes bond=<bondname>[:<bondslaves>:[:<options>]] syntax to parse
bond. For example:
bond=bond0:eth0,eth1:mode=balance-rr
Update v2:
- Get bonding options from corresponding ifcfg. Because it's hard to keep
track of all the runtime configurable options under /sys/class/net/$netif/
- Remove kdump_get_bond_mode, since it's useless now.
Signed-off-by: WANG Chao <chaowang@redhat.com>
Acked-by: Dave Young <dyoung@redhat.com>
Acked-by: Baoquan He <bhe@redhat.com>
blkid do not support UUID/LABEL with quotes, remove the quotes before converting
to dev name, or the result devname will be nul.
Signed-off-by: Dave Young <dyoung@redhat.com>
Acked-by: Baoquan He <bhe@redhat.com>
V4: Sync with the latest teamd
V3: Drop patch 2/2 which harms readability
Move inst_dir to kdump_setup_team()
Avoid saying why teamdctl fails
Error out for vlan over team, like bridge
Remove the useless exit in kdump_get_perm_addr()
V2: remove the tmp config file in /tmp
split the non-team part
BZ: https://bugzilla.redhat.com/show_bug.cgi?id=874025
(This BZ is against RHEL7 though...)
Depends on dracut patch:
http://article.gmane.org/gmane.linux.kernel.initramfs/3043
and depends on latest version of teamd.
This patch adds support for team devices on kdump side.
I tested team active-backup mode and round-robin mode,
vmcore can be dumped over ssh successfully.
Note, currently we don't support stacked devices
on/under team, it is tricky and can be added on request.
Cc: Vivek Goyal <vgoyal@redhat.com>
Cc: Dave Young <dyoung@redhat.com>
Cc: Jiri Pirko <jpirko@redhat.com>
Signed-off-by: Cong Wang <amwang@redhat.com>
Acked-by: Dave Young <dyoung@redhat.com>
With recent dracut a bootdev is needed in cmdline, so dracut can waiting for
this nic ready early in initqueue. So in this patch bootdev=${_netnic} is added
[v1->v2]: use standard cmdline file name 70bootdev.conf
Signed-off-by: Dave Young <dyoung@redhat.com>
Acked-by: Vivek Goyal <vgoyal@redhat.com>
Acked-by: Baoquan He <bhe@redhat.com>
use standard cmdline file name start with digit number: 60kdumpnic.conf
Signed-off-by: Dave Young <dyoung@redhat.com>
Acked-by: Vivek Goyal <vgoyal@redhat.com>
Acked-by: Baoquan He <bhe@redhat.com>
Code in function kdump_install_net used to get server of network dump
is is a little redundent, can be optimized into one line. For nfs/ssh,
this line of code is enough.
Test passed on local kvm guest with Fedora 18.
Signed-off-by: Baoquan He <bhe@redhat.com>
Acked-by: Dave Young <dyoung@redhat.com>
Resolves: bz880551
Currently on fedora directory name of kdump is like 14.11.12-03:40:30.
It's not as readable as RHEL6. The old format of dir is host_ip-date-time.
This patch changes it back like ole one as below.
192.168.122.234-2012-10-31-05:17:20
If can't get HOST_IP for a network kudmp, we just fail. Becasue most
likely any attempt to save dump will also fail.
Signed-off-by: Baoquan He <bhe@redhat.com>
Acked-by: Dave Young <dyoung@redhat.com>
ssh: add random feeding code
openssh usually depends on /dev/urandom to seeding PRNG (pseudo-random number
generator). To ensure there's sufficient entropy just feed /dev/urandom with
saved /var/lib/random-seed which is saved in installing phase.
dracut_install will print error message, so just exit and do not print error
again.
Todo: other dracut_install fail and exit, such as dd, makedumpfile.
[v2->v3]: use [[:blank:]] for whitespace checking.
Signed-off-by: Dave Young <dyoung@redhat.com>
Acked-by: Vivek Goyal <vgoyal@redhat.com>
In initramfs we should use persistent name created by udev to avoid
device rename issue.
fix by using udev persistent name when we copy the kdump.conf
Signed-off-by: Dave Young <dyoung@redhat.com>
Acked-by: Vivek Goyal <vgoyal@redhat.com>
Original host_fs_types could only contain one iscsi slave,
This is due to the check_block_and_slaves will return once the helper function
return TRUE, so only one slave with fs type will be added to host_fs_types[]
Thus, there will no chance to setup other slaves in kdump iscsi setup routine.
Use for_each_host_dev_and_slaves_all to setup all slaves.
Tested by chaowang and myself.
Signed-off-by: Dave Young <dyoung@redhat.com>
Acked-by: Vivek Goyal <vgoyal@redhat.com>
Currently net options means either nfs or ssh dump.
Better to split these two into standalone options. That's more clear to user.
after the split, ssh dump need user specify "ssh user@host"
nfs dump need user specify "nfs host:nfsshare"
Signed-off-by: Dave Young <dyoung@redhat.com>
Acked-by: Vivek Goyal <vgoyal@redhat.com>
file install code should stay in module-setup.sh, move core_collector installation
code as well.
Note: mkdumpfile is installed twice before, one is dracut cmdline, another is
module_setup.sh. This patch removed the duplicate code in dracut cmdline.
Signed-off-by: Dave Young <dyoung@redhat.com>
Acked-by: Vivek Goyal <vgoyal@redhat.com>
moving file install code to module-setup.sh looks better.
This patch move extra_bins installation to module-setup.sh
Signed-off-by: Dave Young <dyoung@redhat.com>
Acked-by: Vivek Goyal <vgoyal@redhat.com>
In case explict DNS setup in ifcfg file, we should add proper cmdline
for dracut network use.
Add a kdump_setup_dns function to handle this.
v1->v2: vivek: use echo instead of 'echo -n'
Signed-off-by: Dave Young <dyoung@redhat.com>
Acked-by: Vivek Goyal <vgoyal@redhat.com>
s390x netdev need special cmdline to bring up
parse the ifcfg file to append proper cmdline, also add znet dracut module
Signed-off-by: Dave Young <dyoung@redhat.com>
Acked-by: Vivek Goyal <vgoyal@redhat.com>
module_setup.sh removed comment and blank lines of kdump.conf, then install it
to initramfs, but it leaved the /tmp/$$-kdump.conf which should be removed.
Signed-off-by: Dave Young <dyoung@redhat.com>
Acked-by: Vivek Goyal <vgoyal@redhat.com>
Update: use /sys/class/net/bondX/bonding/mode
We should set the mode of the bonding properly
in the second kernel too.
Cc: Vivek Goyal <vgoyal@redhat.com>
Signed-off-by: Cong Wang <amwang@redhat.com>
Acked-by: Dave Young <dyoung@redhat.com>
Update: error out vlan over bridge case
This patch adds support for vlan tagged bonding,
in theory, we could support other complex setup as well,
in practice, this is not easy, so just support vlan
tagged bonding, which is the one we support in RHEL6.
Note, this patch depends on the dracut patch:
http://marc.info/?l=initramfs&m=134025049228510&w=2
Cc: Dave Young <dyoung@redhat.com>
Cc: Vivek Goyal <vgoyal@redhat.com>
Signed-off-by: Cong Wang <amwang@redhat.com>
Acked-by: Dave Young <dyoung@redhat.com>
Original patch is from Amerigo, but it has changed a lot:
remove multi dump
refreshed with latest git for the dump instruction function restructure
fixed the behavior of do_kdump_pre, if kdump_pre fails it will reboot
update the docs
check the existance and executable of kdump_pre/post files,
also check the timestamp of them for rebuilding.
refresh patch,
Address comments from vivek:
s/hush/bash in docs
fix the copy-paste error in kdump post error message
s/reboot\/halt/reboot in kexec-kdump-howto.txt
Signed-off-by: Dave Young <dyoung@redhat.com>
Acked-by: Vivek Goyal <vgoyal@redhat.com>
This patch depends on the latest dracut in git.
It adds support of dumping over a vlan device.
Cc: Vivek Goyal <vgoyal@redhat.com>
Signed-off-by: Cong Wang <amwang@redhat.com>
Acked-by: Dave Young <dyoung@redhat.com>
This patch fixes dumping over a bonding interface,
we should pass ifname= for all its underlying slaves,
which is required by dracut.
And it separates the code into a different function.
Cc: Vivek Goyal <vgoyal@redhat.com>
Signed-off-by: Cong Wang <amwang@redhat.com>
Acked-by: Dave Young <dyoung@redhat.com>
This patch fixes dumping over a bridge interface,
we should pass ifname= for all its underlying devices,
which is required by dracut.
And it separates the code into different functions,
for later patches to use.
Cc: Vivek Goyal <vgoyal@redhat.com>
Signed-off-by: Cong Wang <amwang@redhat.com>
Acked-by: Dave Young <dyoung@redhat.com>
Resolves: bz822739
We hardcoded with dhcp in dracut cmdline before.
Fix it by parsing ifcfg to get the proper proto,
echo proper cmdline for both static and dhcp
[v1->v2]: amwang - handle PREFIX as well
Signed-off-by: Dave Young <dyoung@redhat.com>
Acked-by: Cong Wang <amwang@redhat.com>
Acked-by: Vivek Goyal <vgoyal@redhat.com>
BZ: 822701
This patch implements basic software iscsi dump support. Complex iscsi
setups like ibft etc might not work.
iscsi self configuration logic is currenlty part of kdump module. At some
point of time I would like to see it in dracut iscsi module instead of
kdump module when iscsi and other subsystems become self configuration aware
for general boot.
This patch will require work for complex setups. Some of them are.
- IPV6 support
- IBFT support
- Parsing some more advanced parameters and passing to netroot option.
Signed-off-by: Vivek Goyal <vgoyal@redhat.com>
Acked-by: Dave Young <dyoung@redhat.com>
BZ: 822701
This allows to reuse same function from iscsi setup code too. Also makes
code more modular.
[dyoung: add a missed space]
Signed-off-by: Vivek Goyal <vgoyal@redhat.com>
Acked-by: Dave Young <dyoung@redhat.com>
cleanup module_setup.sh, move code blocks to functions.
[v1->v2]: vivek: add kdump_ prefix to kdump functions because dracut
source this file
Signed-off-by: Dave Young <dyoung@redhat.com>
Acked-by: Vivek Goyal <vgoyal@redhat.com>
Resolves: bz816864
currently kexec-tools maintains kdump dracut modules as below dir hierarchy:
[dave@localhost fedpkg]$ tree kexec-tools/kdump_dracut_modules
kexec-tools/kdump_dracut_modules
`-- 99kdumpbase
|-- kdump.sh
`-- module-setup.sh
But in kexec-tools.spec, sources line is below:
Source100: dracut-files.tbz2
So we need to manually generate the dracut-files.tbz2, upload it, modify
the sources file which contains the md5sum of these binaies, and then do
the building. The more headache problem is this make local tests of
changes to kdump module hard.
To ease future work, move the files to TOPDIR, cp the sources instead.
Thanks for help from dzickus
[v1->v2]: Also remove dracut-files.tbz2 from sources file
ChaoWang: add prefix to dracut files
