Backports:
commit 54aec3878b3f91341e6bc735eda158cca5c54ec9
Author: Alexander Egorenkov <egorenar@linux.ibm.com>
Date: Fri Sep 18 13:55:56 2020 +0200
[PATCH] make use of 'uts_namespace.name' offset in VMCOREINFO
* Required for kernel 5.11
The offset of the field 'init_uts_ns.name' has changed since
kernel commit 9a56493f6942 ("uts: Use generic ns_common::count").
Make use of the offset 'uts_namespace.name' if available in
VMCOREINFO.
Signed-off-by: Alexander Egorenkov <egorenar@linux.ibm.com>
Signed-off-by: Kairui Song <kasong@redhat.com>
commit 44b073b7ec467aee0d7de381d455b8ace1199184
Author: John Ogness <john.ogness@linutronix.de>
Date: Wed Nov 25 10:10:31 2020 +0106
[PATCH 2/2] printk: use committed/finalized state values
* Required for kernel 5.10
The ringbuffer entries use 2 state values (committed and finalized)
rather than a single flag to represent being available for reading.
Copy the definitions and state lookup function directly from the
kernel source and use the new states.
Signed-off-by: John Ogness <john.ogness@linutronix.de>
Signed-off-by: Kairui Song <kasong@redhat.com>
Backports:
commit c617ec63339222f3a44d73e36677a9acc8954ccd
Author: John Ogness <john.ogness@linutronix.de>
Date: Thu Nov 19 02:41:21 2020 +0000
[PATCH 1/2] printk: add support for lockless ringbuffer
* Required for kernel 5.10
Linux 5.10 introduces a new lockless ringbuffer. The new ringbuffer
is structured completely different to the previous iterations.
Add support for retrieving the ringbuffer from debug information
and/or using vmcoreinfo. The new ringbuffer is detected based on
the availability of the "prb" symbol.
Signed-off-by: John Ogness <john.ogness@linutronix.de>
Signed-off-by: Kazuhito Hagio <k-hagio-ab@nec.com>
Signed-off-by: Kairui Song <kasong@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.
Since the logger was introduced into kdump, let's enable it for kdump
so that we can output kdump messages according the log level and save
these messages for debugging.
Signed-off-by: Lianbo Jiang <lijiang@redhat.com>
Acked-by: Kairui Song <kasong@redhat.com>
Kdump service will create kdump initramfs when needed, but it won't
clean up the kdump initramfs on kernel uninstall. So create a kernel
install hook to do the clean up job.
Signed-off-by: Kairui Song <kasong@redhat.com>
Acked-by: Dave Young <dyoung@redhat.com>
If the directory /etc/kdump/pre.d is optional, then it is hard
to tell between the following cases:
-1. no directory "/etc/kdump/pre.d"
-2. "rm -rf /etc/kdump/pre.d", which removes all scripts under pre.d
For the second case, kdump.img should be rebuilt.
To bail out from this corner case, always creating pre.d and post.d
during rpm installation.
Signed-off-by: Pingfan Liu <piliu@redhat.com>
Acked-by: Kairui Song <kasong@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>
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>
Backport from the upstream makedumpfile devel branch.
commit 989152e113bfcb4fbfbad6f3aed6f43be4455919
Author: Kazuhito Hagio <k-hagio-ab@nec.com>
Date: Tue Feb 25 16:04:55 2020 -0500
[PATCH] Introduce --check-params option
Currently it's difficult to check whether a makedumpfile command-line
is valid or not without an actual panic. This is inefficient and if
a wrong configuration is not tested, you will miss the vmcore when an
actual panic occurs.
In order for kdump facilities like kexec-tools to be able to check
the specified command-line parameters in advance, introduce the
--check-params option that only checks them and exits immediately.
Signed-off-by: Kazuhito Hagio <k-hagio-ab@nec.com>
Signed-off-by: Kazuhito Hagio <k-hagio-ab@nec.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>
Backport from the makedumpfile devel branch in upstream.
commit 8425342a52b23d462f10bceeeb1c8a3a43d56bf0
Author: Kazuhito Hagio <k-hagio@ab.jp.nec.com>
Date: Fri Sep 6 09:50:34 2019 -0400
[PATCH] Fix inconsistent return value from find_vmemmap()
When -e option is given, the find_vmemmap() returns FAILED(1) if
it failed on x86_64, but on architectures other than that, it is
stub_false() and returns FALSE(0).
if (info->flag_excludevm) {
if (find_vmemmap() == FAILED) {
ERRMSG("Can't find vmemmap pages\n");
#define find_vmemmap() stub_false()
As a result, on the architectures other than x86_64, the -e option
does some unnecessary processing with no effect, and marks the dump
DUMP_DH_EXCLUDED_VMEMMAP unexpectedly.
Also, the functions for the -e option return COMPLETED or FAILED,
which are for command return value, not for function return value.
So let's fix the issue by following the common style that returns
TRUE or FALSE, and avoid confusion.
Signed-off-by: Kazuhito Hagio <k-hagio@ab.jp.nec.com>
Signed-off-by: Kazuhito Hagio <k-hagio@ab.jp.nec.com>
Acked-by: Kairui Song <kasong@redhat.com>
Backport from the makedumpfile devel branch in upstream.
commit b461971bfac0f193a0c274c3b657d158e07d4995
Author: Kazuhito Hagio <k-hagio@ab.jp.nec.com>
Date: Thu Aug 29 14:51:56 2019 -0400
[PATCH] Fix exclusion range in find_vmemmap_pages()
In the function, since pfn ranges are literally start and end, not start
and end+1, if the struct page of endpfn is at the last in a vmemmap page,
the vmemmap page is dropped by the following code, and not excluded.
npfns_offset = endpfn - vmapp->rep_pfn_start;
vmemmap_offset = npfns_offset * size_table.page;
// round down to page boundary
vmemmap_offset -= (vmemmap_offset % pagesize);
We can use (endpfn+1) here to fix.
Signed-off-by: Kazuhito Hagio <k-hagio@ab.jp.nec.com>
Signed-off-by: Kazuhito Hagio <k-hagio@ab.jp.nec.com>
Acked-by: Kairui Song <kasong@redhat.com>
Backport from the makedumpfile devel branch in upstream.
commit aa5ab4cf6c7335392094577380d2eaee8a0a8d52
Author: Kazuhito Hagio <k-hagio@ab.jp.nec.com>
Date: Thu Aug 29 12:26:34 2019 -0400
[PATCH] x86_64: Fix incorrect exclusion by -e option with KASLR
The -e option uses info->vmemmap_start for creating a table to determine
the positions of page structures that should be excluded, but it is a
hardcoded value even with KASLR-enabled vmcore. As a result, the option
excludes incorrect pages from it.
To fix this, get the vmemmap start address from info->mem_map_data.
Signed-off-by: Kazuhito Hagio <k-hagio@ab.jp.nec.com>
Signed-off-by: Kazuhito Hagio <k-hagio@ab.jp.nec.com>
Acked-by: Kairui Song <kasong@redhat.com>
Backport from the makedumpfile devel branch in upstream.
commit 7bdb468c2c99dd780c9a5321f93c79cbfdce2527
Author: Kazuhito Hagio <k-hagio@ab.jp.nec.com>
Date: Tue Jul 23 12:24:47 2019 -0400
[PATCH] Increase SECTION_MAP_LAST_BIT to 4
kernel commit 326e1b8f83a4 ("mm/sparsemem: introduce a SECTION_IS_EARLY
flag") added the flag to mem_section->section_mem_map value, and it caused
makedumpfile an error like the following:
readmem: Can't convert a virtual address(fffffc97d1000000) to physical address.
readmem: type_addr: 0, addr:fffffc97d1000000, size:32768
__exclude_unnecessary_pages: Can't read the buffer of struct page.
create_2nd_bitmap: Can't exclude unnecessary pages.
To fix this, SECTION_MAP_LAST_BIT needs to be updated. The bit has not
been used until the addition, so we can just increase the value.
Signed-off-by: Kazuhito Hagio <k-hagio@ab.jp.nec.com>
Signed-off-by: Kazuhito Hagio <k-hagio@ab.jp.nec.com>
Acked-by: Dave Young <dyoung@redhat.com>
Acked-by: Kairui Song <kasong@redhat.com>
