upstream: fedora
resolves: bz2003832
conflict: none
commit 227fc2bc7d
Author: Kairui Song <kasong@redhat.com>
Date: Wed Aug 4 03:50:04 2021 +0800
mkdumprd: make dracut_args an array again
To make arguments list work as expected, array is preferred.
Use xargs only to parse the "dracut_args" config value, and pass the
array directly to dracut.
Check following link for details:
https://github.com/koalaman/shellcheck/wiki/SC2089
Signed-off-by: Kairui Song <kasong@redhat.com>
Acked-by: Philipp Rudo <prudo@redhat.com>
Signed-off-by: Tao Liu <ltao@redhat.com>
upstream: fedora
resolves: bz2003832
conflict: none
commit 075e62252e
Author: Kairui Song <kasong@redhat.com>
Date: Wed Aug 4 01:58:04 2021 +0800
mkdumprd: use kdump_get_conf_val to read config values
Simplify the code and cover more corner cases.
Signed-off-by: Kairui Song <kasong@redhat.com>
Acked-by: Philipp Rudo <prudo@redhat.com>
Signed-off-by: Tao Liu <ltao@redhat.com>
upstream: fedora
resolves: bz2003832
conflict: none
commit 80525aface
Author: Kairui Song <kasong@redhat.com>
Date: Wed Aug 4 15:44:02 2021 +0800
kdumpctl: refine grep usage
Use `grep -q` instead of redirect to /dev/null.
Use `grep -c` instead, as suggested in:
https://github.com/koalaman/shellcheck/wiki/SC2126
Use `grep -E` instead of `egrep`.
https://github.com/koalaman/shellcheck/wiki/SC2196
Signed-off-by: Kairui Song <kasong@redhat.com>
Signed-off-by: Tao Liu <ltao@redhat.com>
upstream: fedora
resolves: bz2003832
conflict: none
commit dfb76467c9
Author: Kairui Song <kasong@redhat.com>
Date: Wed Aug 4 16:22:17 2021 +0800
kdumpctl: fix fragile loops over find output
For loops over find output are fragile, use a while read loop:
https://github.com/koalaman/shellcheck/wiki/SC2044
Signed-off-by: Kairui Song <kasong@redhat.com>
Acked-by: Philipp Rudo <prudo@redhat.com
Signed-off-by: Tao Liu <ltao@redhat.com>
upstream: fedora
resolves: bz2003832
conflict: none
commit 01613b7211
Author: Kairui Song <kasong@redhat.com>
Date: Tue Aug 3 22:50:02 2021 +0800
kdumpctl: use kdump_get_conf_val to read config values
Also fixed kdumpctl, use `awk` instead of `cut` to read
core_collector's executable name correctly when its arguments
are not seperated by space.
Signed-off-by: Kairui Song <kasong@redhat.com>
Acked-by: Philipp Rudo <prudo@redhat.com>
Signed-off-by: Tao Liu <ltao@redhat.com>
upstream: fedora
resolves: bz2003832
conflict: none
commit ab1ef78aa2
Author: Kairui Song <kasong@redhat.com>
Date: Wed Aug 4 01:18:48 2021 +0800
kdump-lib.sh: use kdump_get_conf_val to read config values
Signed-off-by: Kairui Song <kasong@redhat.com>
Acked-by: Philipp Rudo <prudo@redhat.com>
Signed-off-by: Tao Liu <ltao@redhat.com>
upstream: fedora
resolves: bz2003832
conflict: none
commit 09ccf88405
Author: Kairui Song <kasong@redhat.com>
Date: Mon Aug 16 23:25:14 2021 +0800
kdump-lib.sh: add a config value retrive helper
Add a helper kdump_get_conf_val to replace get_option_value.
It can help cover more corner cases in the code, like when there are
multiple spaces in config file, config value separated by a tab,
heading spaces, or trailing comments.
And this uses "sed group command" and "sed hold buffer", make it much
faster than previous `grep <config> | tail -1`.
This helper is supposed to provide a universal way for kexec-tools
scripts to read in config value. Currently, different scripts are
reading the config in many different fragile ways.
For example, following codes are found in kexec-tools script code base:
1. grep ^force_rebuild $KDUMP_CONFIG_FILE
echo $_force_rebuild | cut -d' ' -f2
2. grep ^kdump_post $KDUMP_CONFIG_FILE | cut -d\ -f2
3. awk '/^sshkey/ {print $2}' $conf_file
4. grep ^path $KDUMP_CONFIG_FILE | cut -d' ' -f2-
1, 2, and 4 will fail if the space is replaced by, e.g. a tab
1 and 2 might fail if there are multiple spaces between config name
and config value:
"kdump_post /var/crash/scripts/kdump-post.sh"
A space will be read instead of config value.
1, 2, 3 will fail if there are space in file path, like:
"kdump_post /var/crash/scripts dir/kdump-post.sh"
4 will fail if there are trailing comments:
"path /var/crash # some comment here"
And all will fail if there are heading space,
" path /var/crash"
And all will most likely cause problems if the config file contains
the same option more than once.
And all of them are slower than the new sed call. Old get_option_value
is also very slow and doesn't handle heading space.
Although we never claim to support heading space or tailing comments
before, it's harmless to be more robust on config reading, and many
conf files in /etc support heading spaces. And have a faster and
safer config reading helper makes it easier to clean up the code.
Signed-off-by: Kairui Song <kasong@redhat.com>
Acked-by: Philipp Rudo <prudo@redhat.com>
Signed-off-by: Tao Liu <ltao@redhat.com>
upstream: fedora
resolves: bz2003832
conflict: none
commit a0282ab22c
Author: Kairui Song <kasong@redhat.com>
Date: Tue Aug 3 19:49:51 2021 +0800
kdump-lib.sh: add a config format and read helper
Add a helper `kdump_read_conf` to replace read_strip_comments.
`kdump_read_conf` does a few more things:
- remove trailing spaces.
- format the content, remove duplicated spaces between name and value.
- read from KDUMP_CONFIG_FILE (/etc/kdump.conf) directly, avoid pasting
"/etc/kdump.conf" path everywhere in the code.
- check if config file exists, just in case.
Also unify the environmental variable, now KDUMP_CONFIG_FILE stands for
the default config location.
This helps avoid some shell pitfalls about spaces when reading config.
Signed-off-by: Kairui Song <kasong@redhat.com>
Acked-by: Philipp Rudo <prudo@redhat.com>
Signed-off-by: Tao Liu <ltao@redhat.com>
upstream: fedora
resolves: bz2003832
conflict: none
commit bcb1176ec6
Author: Kairui Song <kasong@redhat.com>
Date: Fri Jul 30 01:08:30 2021 +0800
Add a .editorconfig file
EditorConfig file is helpful for tools like `shfmt`, also could be a
hint for code styling.
The code style spec used in this new added .editorconfig file is
generated based on existing code style.
Following commits will make mkfadumprd, mkdumprd, kdumpctl, kdump-lib.sh,
and *-module-setup.sh only be used in first kernel, so use bash syntax
for these scripts. Other scripts will use sh syntax for better POSIX
compatibility.
Signed-off-by: Kairui Song <kasong@redhat.com>
Acked-by: Pingfan Liu <piliu@redhat.com>
Acked-by: Philipp Rudo <prudo@redhat.com>
Signed-off-by: Tao Liu <ltao@redhat.com>
Resolves: bz2014626
Upstream: Fedora
Conflict: None
commit 7ddda7e6d0
Author: Kairui Song <kasong@redhat.com>
Date: Wed Aug 18 22:25:22 2021 +0800
Remove hard requirement on grubby
Downgrade to "Recommends:" as suggested by CoreOS team.
Signed-off-by: Kairui Song <kasong@redhat.com>
Acked-by: Tao Liu <ltao@redhat.com>
Signed-off-by: Tao Liu <ltao@redhat.com>
Signed-off-by: Timothée Ravier <travier@redhat.com>
Resolves: bz1986281
Conflict: None
Upstream: Fedora
commit 7b7ddaba88
Author: Kairui Song <kasong@redhat.com>
Date: Fri Jul 2 01:31:26 2021 +0800
kdump-lib.sh: kdump_get_arch_recommend_size uses crashkernel.default
The new `crashkernel.default` file in kernel package can be used as the
ck_cmdline source.
Also keep the legacy code so old kernel packages will still work.
Signed-off-by: Kairui Song <kasong@redhat.com>
Acked-by: Pingfan Liu <piliu@redhat.com>
Signed-off-by: Kairui Song <kasong@redhat.com>
Previous commit da6b280 ('Cleanup dead systemd services before start sysroot.mount')
is not enough for fixing bz1972463. Coiby found a new issue that never
saw before, this patch fixes it.
Resolves: bz1972463
Conflict: None
Upstream: Fedora
commit 660cf4ac03
Author: Kairui Song <kasong@redhat.com>
Date: Tue Jul 20 13:41:08 2021 +0800
Make `dump_to_rootfs` wait for 90s for real
When `failure_action` is set to `dump_to_rootfs`, the message:
"Waiting for rootfs mount, will timeout after 90 seconds"
is actually wrong. Kdump will simply call `systemctl start sysroot.mount`,
but the timeout value of sysroot.mount depends on the unit service and
dracut parameters. And by default, dracut will set
JobRunningTimeoutSec=0 and JobTimeoutSec=0 for the device units,
which means it will wait forever. (see wait_for_dev function in dracut)
For some devices, this can be fixed by setting rd.timeout=90. But when
initqueue is set enabled during initramfs build, dracut will force set
timeout for host devices to `0`. (see 99base/module-setup.sh).
Depending on dracut / systemd can make things unpredictable and break as
parameters or code change. To make things easy to understand and
maintain, just call `systemctl` with `--no-block` params, and implement
a standalone wait loop. Now `dump_to_rootfs` will actually wait for
90s then timeout.
Signed-off-by: Kairui Song <kasong@redhat.com>
Acked-by: Coiby Xu <coxu@redhat.com>
Signed-off-by: Kairui Song <kasong@redhat.com>
Resolves: bz1982474
Upstream: Fedora
Conflict: None
commit b2bbb54d89
Author: Coiby Xu <coxu@redhat.com>
Date: Thu Jul 15 09:18:33 2021 +0800
Check the existence of /sys/bus/ccwgroup/devices/*/online beforehand
On s390x KVM machines, the following errors would show when building kdump
initramfs that dumps vmcore to a remote target,
$ kdumpctl rebuild
/usr/lib/dracut/modules.d/99kdumpbase/module-setup.sh: line 475: /sys/bus/ccwgroup/devices/online: No such file or directory
/usr/lib/dracut/modules.d/99kdumpbase/module-setup.sh: line 476: [: -ne: unary operator expected
This happens because s390x KVM machines use virtual network and
/sys/bus/ccwgroup/devices/ exists but is empty. Fix it by check
the existence of file "/sys/bus/ccwgroup/devices/*/online".
Fixes: commit 7d47251568
("Iterate /sys/bus/ccwgroup/devices to tell if we should set up rd.znet")
BugLink: https://bugzilla.redhat.com/show_bug.cgi?id=1982474
Reported-by: Jie Li <jieli@redhat.com>
Signed-off-by: Coiby Xu <coxu@redhat.com>
Acked-by: Kairui Song <kasong@redhat.com>
Signed-off-by: Coiby Xu <coxu@redhat.com>
Resolves: bz1979879
Upstream: Fedora
Conflict: None
commit 914a856c66
Author: Philipp Rudo <prudo@redhat.com>
Date: Fri Jul 16 10:34:35 2021 +0200
kdump.sysconfig.s390: Remove "prot_virt" from kdump kernel cmdline
"prot_virt" enables the kernel to run Secure Execution virtual machines
on s390. These virtual machines are isolated from the hypervisor and
thus protected against tampering by a malicious host. Enabling
"prot_virt" requires a minimum of ~2.5GB memory which exceeds what is
typically reserved for the crashkernel. Thus remove "prot_virt" from the
command line for the 2nd kernel to prevent it to run out-of-memory.
For more discussions about this, see:
https://lists.fedoraproject.org/archives/list/kexec@lists.fedoraproject.org/thread/QSRRNV4ALKXUJC2VM3US4Z2NSQRHVMXB/
Signed-off-by: Philipp Rudo <prudo@redhat.com>
Acked-by: Baoquan He <bhe@redhat.com>
Signed-off-by: Philipp Rudo <prudo@redhat.com>
Resolves: bz1924115
Conflict: None
Upstream: Fedora
commit 97930d3cca
Author: Kairui Song <kasong@redhat.com>
Date: Mon Jun 28 13:57:27 2021 +0800
fadump-init: clean up mount points properly
When running with squash module enabled for both initramfs, /dev and
/run are also mounted by squash-init, so move them to newroot as well,
else they might leak.
Also pass `-d` to umount so loop devices (if used) will be force freed.
Signed-off-by: Kairui Song <kasong@redhat.com>
Acked-by: Hari Bathini <hbathini@linux.ibm.com>
Signed-off-by: Kairui Song <kasong@redhat.com>
Resolves: bz1924115
Conflict: None
Upstream: Fedora
commit bf6671b60d
Author: Kairui Song <kasong@redhat.com>
Date: Fri Jun 25 14:44:45 2021 +0800
fadump: kdumpctl should check the modules used by the fadump initramfs
After fadump embedded the fadump initramfs in the normal initramfs,
kdumpctl will mistakenly rebuild the initramfs everytime.
kdumpctl checks the hostonly-kernel-modules.txt file in initramfs
to check if required drivers are included, but the normal initramfs
is built in non-hostonly mode, so it doesn't have a
hostonly-kernel-modules.txt file. The check will always fail.
So let mkfadumprd make a copy of the hostonly-kernel-modules.txt in the
fadump initramfs and let kdumpctl check that file instead.
Signed-off-by: Kairui Song <kasong@redhat.com>
Acked-by: Hari Bathini <hbathini@linux.ibm.com>
Signed-off-by: Kairui Song <kasong@redhat.com>
Resolves: bz1924115
Conflict: None
Upstream: Fedora
commit fa9201b240 (devel)
Author: Hari Bathini <hbathini@linux.ibm.com>
Date: Wed Jun 23 20:06:48 2021 +0530
fadump: isolate fadump initramfs image within the default one
In case of fadump, the initramfs image has to be built to boot into
the production environment as well as to offload the active crash dump
to the specified dump target (for boot after crash). As the same image
would be used for both boot scenarios, it could not be built optimally
while accommodating both cases.
Use --include to include the initramfs image built for offloading
active crash dump to the specified dump target. Also, introduce a new
out-of-tree dracut module (99zz-fadumpinit) that installs a customized
init program while moving the default /init to /init.dracut. This
customized init program is leveraged to isolate fadump image within
the default initramfs image by kicking off default boot process
(exec /init.dracut) for regular boot scenario and activating fadump
initramfs image, if the system is booting after a crash.
If squash is available, ensure default initramfs image is also built
with squash module to reduce memory consumption in capture kernel.
Signed-off-by: Hari Bathini <hbathini@linux.ibm.com>
Signed-off-by: Kairui Song <kasong@redhat.com>
Acked-by: Kairui Song <kasong@redhat.com>
Signed-off-by: Kairui Song <kasong@redhat.com>
Resolves: bz1972463
Conflict: None
Upstream: Fedora
commit 2603ba7187 (origin/rawhide, rawhide)
Author: Kairui Song <kasong@redhat.com>
Date: Fri Jul 2 03:27:05 2021 +0800
Cleanup dead systemd services before start sysroot.mount
When kdump failed due to initqueue timeout, the sysroot.mount and other
serivces could be stuck in `start` but `dead` status:
Example output of systemctl:
dev-disk-by\x2duuid-530830d1\x2df2c7\x2d4c9a\x2d9a82\x2d148609097521.device loaded inactive dead start
<... snip ...>
squash-root.mount loaded active mounted /squash/root
squash.mount loaded active mounted /squash
sysroot.mount loaded inactive dead start /sysroot
<... snip ...>
dracut-cmdline.service loaded active exited dracut cmdline hook
dracut-initqueue.service loaded activating start start dracut initqueue hook
dracut-mount.service loaded inactive dead start dracut mount hook
At this point calling `systemctl start sysroot.mount` will just hang as
systemd will just wait for the services that are stuck in `start`
status. So call `systemctl cancel` here to cancel all pending jobs and
have a clean start for mounting sysroot.
Signed-off-by: Kairui Song <kasong@redhat.com>
Acked-by: Coiby Xu <coxu@redhat.com>
Signed-off-by: Kairui Song <kasong@redhat.com>
Resolves: bz1974638
Upstream: Fedora
Conflict: Minor conflict in spec file resolved easily
commit 6463641935
Author: Kairui Song <kasong@redhat.com>
Date: Thu Jun 10 13:06:23 2021 +0800
Add a new hook: 92-crashkernel.install
To track and manage kernel's crashkernel usage by kernel version,
each kernel package will include a crashkernel.default containing the
default `crashkernel=` value of that kernel. So we can use a hook to
update the kernel cmdline of new installed kernel accordingly.
Put it after all other grub boot loader setup hooks, so it can simply
call grubby to modify the kernel cmdline.
Signed-off-by: Kairui Song <kasong@redhat.com>
Acked-by: Baoquan He <bhe@redhat.com>
Signed-off-by: Kairui Song <kasong@redhat.com>
Resolves: bz1974638
Upstream: Fedora
Conflict: None
commit 86130ec10f
Author: Kairui Song <kasong@redhat.com>
Date: Thu Jun 10 13:06:22 2021 +0800
kdumpctl: Add kdumpctl reset-crashkernel
In newer kernel, crashkernel.default will contain the default
crashkernel value of a kernel build. So introduce a new sub command
to help user reset kernel crashkernel size to the default value.
Signed-off-by: Kairui Song <kasong@redhat.com>
Acked-by: Baoquan He <bhe@redhat.com>
Signed-off-by: Kairui Song <kasong@redhat.com>
Resolves: bz1974638
Upstream: Fedora
Conflict: None
commit 017903c3c4
Author: Kairui Song <kasong@redhat.com>
Date: Fri Jun 25 03:42:19 2021 +0800
Revert "kdump-lib.sh: Remove is_atomic"
Now we need this helper again, for `reset-crashkernel`
This reverts commit ff46cfb19e.
Signed-off-by: Kairui Song <kasong@redhat.com>
Acked-by: Baoquan He <bhe@redhat.com>
Signed-off-by: Kairui Song <kasong@redhat.com>
Related: bz1977543
Upstream: Fedora
Conflict: None
commit ad6f60d70d
Author: Coiby Xu <coxu@redhat.com>
Date: Mon Jun 28 18:37:11 2021 +0800
fix format issue in find_online_znet_device
Change spaces to tab to fix alignment issue.
Fixes: commit 7d47251568
("Iterate /sys/bus/ccwgroup/devices to tell if we should set up rd.znet")
Signed-off-by: Coiby Xu <coxu@redhat.com>
Acked-by: Kairui Song <kasong@redhat.com>
Signed-off-by: Coiby Xu <coxu@redhat.com>
Resolves: bz1977543
Upstream: Fedora
Conflict: None
commit 03f9b91351
Author: Coiby Xu <coxu@redhat.com>
Date: Mon Jun 28 18:37:10 2021 +0800
check the existence of /sys/bus/ccwgroup/devices before trying to find online network device
/sys/bus/ccwgroup/devices doesn't exist for non-s390x machines which leads to
the warning "find: '/sys/bus/ccwgroup/devices': No such file or directory".
This warning can be eliminated by checking the existence of
"/sys/bus/ccwgroup/devices" beforehand.
Fixes: commit 7d47251568
("Iterate /sys/bus/ccwgroup/devices to tell if we should set up rd.znet")
Reported-by: Ruowen Qin <ruqin@redhat.com>
BugLink: https://bugzilla.redhat.com/show_bug.cgi?id=1974618
Signed-off-by: Coiby Xu <coxu@redhat.com>
Acked-by: Kairui Song <kasong@redhat.com>
Signed-off-by: Coiby Xu <coxu@redhat.com>
Resolves: bz1974178
Upstream: Fedora
Conflict: None
commit 9a6f589d99dcef114c89fde992157f5467028c8f
Author: Tao Liu <ltao@redhat.com>
Date: Fri Jun 18 18:28:04 2021 +0800
[PATCH] check for invalid physical address of /proc/kcore when making ELF dumpfile
Previously when executing makedumpfile with -E option against
/proc/kcore, makedumpfile will fail:
# makedumpfile -E -d 31 /proc/kcore kcore.dump
...
write_elf_load_segment: Can't convert physaddr(ffffffffffffffff) to an offset.
makedumpfile Failed.
It's because /proc/kcore contains PT_LOAD program headers which have
physaddr (0xffffffffffffffff). With -E option, makedumpfile will
try to convert the physaddr to an offset and fails.
Skip the PT_LOAD program headers which have such physaddr.
Signed-off-by: Tao Liu <ltao@redhat.com>
Signed-off-by: Kazuhito Hagio <k-hagio-ab@nec.com>
Signed-off-by: Tao Liu <ltao@redhat.com>
Resolves: bz1972464
Upstream: Fedora
Conflict: None
commit 646456862df8926ba10dd7330abf3bf0f887e1b6
Author: Kazuhito Hagio <k-hagio-ab@nec.com>
Date: Wed May 26 14:31:26 2021 +0900
[PATCH] Increase SECTION_MAP_LAST_BIT to 5
* Required for kernel 5.12
Kernel commit 1f90a3477df3 ("mm: teach pfn_to_online_page() about
ZONE_DEVICE section collisions") added a section flag
(SECTION_TAINT_ZONE_DEVICE) and causes makedumpfile an error on
some machines like this:
__vtop4_x86_64: Can't get a valid pmd_pte.
readmem: Can't convert a virtual address(ffffe2bdc2000000) to physical address.
readmem: type_addr: 0, addr:ffffe2bdc2000000, size:32768
__exclude_unnecessary_pages: Can't read the buffer of struct page.
create_2nd_bitmap: Can't exclude unnecessary pages.
Increase SECTION_MAP_LAST_BIT to 5 to fix this. The bit had not
been used until the change, so we can just increase the value.
Signed-off-by: Kazuhito Hagio <k-hagio-ab@nec.com>
Signed-off-by: Tao Liu <ltao@redhat.com>
Resolves: bz1975632
Upstream: Fedora
Conflict: None
commit 6137956f79
Author: Kairui Song <kasong@redhat.com>
Date: Wed Apr 14 13:41:19 2021 +0800
kdumpctl: fix check_config error when kdump.conf is empty
Kdump scirpt already have default values for core_collector, path in
many other place. Empty kdump.conf still works. Fix this corner case and
fix the error message.
Signed-off-by: Kairui Song <kasong@redhat.com>
Acked-by: Pingfan Liu <piliu@redhat.com>
Signed-off-by: Tao Liu <ltao@redhat.com>
Resolves: bz1968374
Upstream: Fedora
Conflict: None
commit 39a642b66b
Author: Hari Bathini <hbathini@linux.ibm.com>
Date: Tue Jun 1 16:46:58 2021 +0530
kdump-lib.sh: fix a warning in prepare_kdump_bootinfo()
Fix the warning observed when KDUMP_KERNELVER is specified:
kdumpctl[10926]: /lib/kdump/kdump-lib.sh: line 697: [: missing `]'
Signed-off-by: Hari Bathini <hbathini@linux.ibm.com>
Acked-by: Kairui Song <kasong@redhat.com>
Signed-off-by: Pingfan Liu <piliu@redhat.com>
Resolves: bz1965952
Upstream: Fedora
Conflict: None
commit 75bdcb7399
Author: Kelvin Fan <kfan@redhat.com>
Date: Fri Apr 16 22:31:13 2021 +0000
Write to `/var/lib/kdump` if $KDUMP_BOOTDIR not writable
The `/boot` directory on some operating systems might be read-only.
If we cannot write to `$KDUMP_BOOTDIR` when generating the kdump
initrd, attempt to place the generated initrd at `/var/lib/kdump`
instead.
Signed-off by: Kelvin Fan <kelvinfan001@gmail.com>
Acked-by: Kairui Song <kasong@redhat.com>
Signed-off-by: Tao Liu <ltao@redhat.com>
Resolves: bz1941905
Upstream: Fedora
Conflict: None
commit 7d47251568
Author: Coiby Xu <coxu@redhat.com>
Date: Mon Jun 7 07:26:03 2021 +0800
Iterate /sys/bus/ccwgroup/devices to tell if we should set up rd.znet
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>
Signed-off-by: Coiby Xu <coxu@redhat.com>
Resolves: bz1901024
Upstream: Fedora
Conflict: None
commit 41980f30d9
Author: Kairui Song <kasong@redhat.com>
Date: Mon Apr 26 17:09:57 2021 +0800
Use a customized emergency shell
Use a modified and minimized version of emergency shell.
The differences of this kdump shell and dracut emergency shell are:
- Kdump shell won't generate a rdsosreport automatically
- Customized prompts
- Never ask root password
- Won't tangle with dracut's emergency_action. If emergency_action is
set, dracut emergency shell will perform dracut's emergency_action
instead of kdump final_action on exit.
- If rd.shell=no is set, kdump shell will still work, dracut emergency
shell won't, even if kdump failure_action is set to shell.
Signed-off-by: Kairui Song <kasong@redhat.com>
Acked-by: Coiby Xu <coxu@redhat.com>
Signed-off-by: Kairui Song <kasong@redhat.com>
Resolves: bz1901024
Upstream: Fedora
Conflict: None
commit a2306346bc
Author: Kairui Song <kasong@redhat.com>
Date: Mon Apr 26 17:09:56 2021 +0800
Remove the kdump error handler isolation wrapper
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>
Signed-off-by: Kairui Song <kasong@redhat.com>
Resolves: bz1901024
Upstream: Fedora
Conflict: None
commit 108258139a
Author: Kairui Song <kasong@redhat.com>
Date: Mon Apr 26 17:09:55 2021 +0800
Don's try to restart dracut-initqueue if it's already there
kdump's dump_to_rootfs will try to start initqueue unconditionally.
dump_to_rootfs will run after systemd isolate to emergency
target, so this is currently accetable.
But there is a problem when initqueue starts the emergency action
because of initqueue timeout. dump_to_rootfs will start initqueue and
lead to timeout again.
So following patch will remove the previous isolation wrapper, and
detect the service status here. Previous isolation makes the detection
impossible. Now this detection will be valid and helpful to prevent
double timeout or hang.
Signed-off-by: Kairui Song <kasong@redhat.com>
Acked-by: Coiby Xu <coxu@redhat.com>
Signed-off-by: Kairui Song <kasong@redhat.com>
