kexec June 2020

kexec@lists.fedoraproject.org

5 participants
22 discussions

[PATCH] mkdumprd: allow spaces after 'path' config phrase when network dump
by Kazuhito Hagio 26 May '22

26 May '22

Without this patch, when there are two or more spaces after 'path' configuration phrase with ssh or nfs setting, SAVE_PATH is set to '/var/crash' in mkdumprd, and in most cases kdump service fails to start. ssh kdump(a)192.168.122.1 path /kdump ^^ This behavior would be too sensitive and different from the other configurations. With this patch, mkdumprd allows such spaces. Signed-off-by: Kazuhito Hagio <k-hagio(a)ab.jp.nec.com> --- mkdumprd | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/mkdumprd b/mkdumprd index a6f7fe8..aa0abfd 100644 --- a/mkdumprd +++ b/mkdumprd @@ -13,7 +13,7 @@ export IN_KDUMP=1 conf_file="/etc/kdump.conf" SSH_KEY_LOCATION="/root/.ssh/kdump_id_rsa" -SAVE_PATH=$(grep ^path $conf_file| cut -d' ' -f2) +SAVE_PATH=$(awk '/^path/ {print $2}' $conf_file) [ -z "$SAVE_PATH" ] && SAVE_PATH=$DEFAULT_PATH # strip the duplicated "/" SAVE_PATH=$(echo $SAVE_PATH | tr -s /) -- 2.18.0

4 3

[PATCH 0/5] trival fixes and improvement of pre.d/post.d hooks
by Pingfan Liu 06 Jul '20

06 Jul '20

Pingfan Liu (5): kdump.conf: fix grammar kdumpctl: make the existence of pre.d and post.d mandatory kdumpctl: rely on the timestamp of scripts' directory to tell modification kdumpctl: remove executable checking on pre.d and post.d module-setup.sh: suppress false alarm dracut-module-setup.sh | 4 ++-- kdump.conf | 2 +- kdumpctl | 24 ++++++++++-------------- 3 files changed, 13 insertions(+), 17 deletions(-) -- 2.7.5

4 14

[PATCH 0/4] use the option KEXEC_ARGS="-s" to enable the kexec file load
by Lianbo Jiang 30 Jun '20

30 Jun '20

This series includes four patches: [1] Revert "kdump-lib: switch to the kexec_file_load() syscall on x86_64 by default" [2] Revert "s390x: add kdump sysconfig option to use the kexec_file_load() syscall" [3] x86_64: enable the kexec file load by default [4] s390x: enable the kexec file load by default Let's restore the logic of secureboot status check, and remove the option 'KDUMP_FILE_LOAD=on|off'. We will use the option KEXEC_ARGS="-s" to enable the kexec file load by default, which can avoid failures when the secureboot is enabled. Lianbo Jiang (4): Revert "kdump-lib: switch to the kexec_file_load() syscall on x86_64 by default" Revert "s390x: add kdump sysconfig option to use the kexec_file_load() syscall" x86_64: enable the kexec file load by default s390x: enable the kexec file load by default dracut-early-kdump.sh | 5 ++--- kdump-lib.sh | 29 +++++++++++++++++++++++++++++ kdump.sysconfig.s390x | 8 +------- kdump.sysconfig.x86_64 | 8 +------- kdumpctl | 13 ++++++------- 5 files changed, 39 insertions(+), 24 deletions(-) -- 2.17.1

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[PATCH] mkdumprd: Improve the error message for umounted dump target
by Kairui Song 24 Jun '20

24 Jun '20

Since commit ca01cbd, mkdumprd can generate the initramfs even if dump target is not mounted. But it will refuse to work if the dump target is not marked as noauto, and not mounted. If a target is not marked as noauto in fstab, it should be mounted automatically on boot. If it's not mounted, most likely something is wrong and user should fix that. So mkdumprd will just show an error message and quit to avoid further failure. This commit make the error message more clear and less confusing. --- mkdumprd | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/mkdumprd b/mkdumprd index bf816fc..0965cb4 100644 --- a/mkdumprd +++ b/mkdumprd @@ -222,7 +222,7 @@ check_user_configured_target() [ $? -ne 0 ] && perror_exit "Failed to mount $_target on $_mnt for kdump preflight check." _mounted=$_mnt else - perror_exit "$_target is configured in fstab but not mounted, please check its usability." + perror_exit "Dump target \"$_target\" is neither mounted nor configured as \"noauto\"" fi fi else -- 2.26.2

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[PATCHv2] man: improve description about /etc/kdump/{pre.d,post.d}interface
by Pingfan Liu 22 Jun '20

22 Jun '20

The description is identical to the notes in kdump.conf Signed-off-by: Pingfan Liu <piliu(a)redhat.com> --- v1 -> v2: grammar fix: s/is exist/exists/ kdump.conf.5 | 12 ++++++++++++ kexec-kdump-howto.txt | 8 ++++++++ 2 files changed, 20 insertions(+) diff --git a/kdump.conf.5 b/kdump.conf.5 index 5a0952b..9f2b2b6 100644 --- a/kdump.conf.5 +++ b/kdump.conf.5 @@ -109,6 +109,11 @@ status of the current dump process is fed to the kdump_post executable as its first argument($1). Executable can modify it to indicate the new exit status of succeeding dump process, .PP +If /etc/kdump/post.d directory exists, All files in +the directory are collectively sorted and executed in +lexical order, before binary or script specified +kdump_post parameter is executed. +.PP Note that scripts written for use with this directive must use the /bin/bash interpreter. .RE @@ -124,6 +129,13 @@ as follows: .PP non 0 - reboot the system .PP +If /etc/kdump/pre.d directory exists, all files in +the directory are collectively sorted and executed in +lexical order, after binary or script specified +kdump_pre parameter is executed. +Even if the binary or script in /etc/kdump/pre.d directory +returns non 0 exit status, the processing is continued. +.PP Note that scripts written for this directive must use the /bin/bash interpreter. .RE diff --git a/kexec-kdump-howto.txt b/kexec-kdump-howto.txt index 78ebf69..9b0fee2 100644 --- a/kexec-kdump-howto.txt +++ b/kexec-kdump-howto.txt @@ -543,6 +543,9 @@ It is possible to specify a custom script or binary you wish to run following an attempt to capture a vmcore. The executable is passed an exit code from the capture process, which can be used to trigger different actions from within your post-capture executable. +If /etc/kdump/post.d directory exist, All files in the directory are +collectively sorted and executed in lexical order, before binary or script +specified kdump_post parameter is executed. Kdump Pre-Capture Executable ---------------------------- @@ -551,6 +554,11 @@ It is possible to specify a custom script or binary you wish to run before capturing a vmcore. Exit status of this binary is interpreted: 0 - continue with dump process as usual non 0 - reboot the system +If /etc/kdump/pre.d directory exists, all files in the directory are collectively +sorted and executed in lexical order, after binary or script specified +kdump_pre parameter is executed. +Even if the binary or script in /etc/kdump/pre.d directory returns non 0 +exit status, the processing is continued. Extra Binaries -------------- -- 2.7.5

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[PATCH v2 0/2] Fix kdump issues with UUID= or LABEL= config style
by Kairui Song 22 Jun '20

22 Jun '20

Previous patch series: [PATCH v2 0/7] Add support for unmounted dump target assumed get_persistent_dev accepts any block target config format. But it doesn't recognize the UUID= or LABEL= format. So always use the wrapper version for kdump which supports it well. Also fix a nfs detection issue introduced the that patch series. Kairui Song (2): Always wrap up call to dracut get_persistent_dev function mkdumprd: Fix nfs detection in to_mount Update from v1: - Keep kdump_get_persistent_dev function name unchanged - Simplify and fix nfs dump target detection in to_mount again dracut-module-setup.sh | 14 -------------- kdump-lib.sh | 14 ++++++++++++++ kdumpctl | 2 +- mkdumprd | 24 ++++++++++-------------- 4 files changed, 25 insertions(+), 29 deletions(-) -- 2.26.2

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[PATCH] man: improve description about /etc/kdump/{pre.d,post.d}interface
by Pingfan Liu 16 Jun '20

16 Jun '20

The description is identical to the notes in kdump.conf Signed-off-by: Pingfan Liu <piliu(a)redhat.com> --- kdump.conf.5 | 12 ++++++++++++ kexec-kdump-howto.txt | 8 ++++++++ 2 files changed, 20 insertions(+) diff --git a/kdump.conf.5 b/kdump.conf.5 index 5a0952b..e275662 100644 --- a/kdump.conf.5 +++ b/kdump.conf.5 @@ -109,6 +109,11 @@ status of the current dump process is fed to the kdump_post executable as its first argument($1). Executable can modify it to indicate the new exit status of succeeding dump process, .PP +If /etc/kdump/post.d directory is exist, All files in +the directory are collectively sorted and executed in +lexical order, before binary or script specified +kdump_post parameter is executed. +.PP Note that scripts written for use with this directive must use the /bin/bash interpreter. .RE @@ -124,6 +129,13 @@ as follows: .PP non 0 - reboot the system .PP +If /etc/kdump/pre.d directory exists, all files in +the directory are collectively sorted and executed in +lexical order, after binary or script specified +kdump_pre parameter is executed. +Even if the binary or script in /etc/kdump/pre.d directory +returns non 0 exit status, the processing is continued. +.PP Note that scripts written for this directive must use the /bin/bash interpreter. .RE diff --git a/kexec-kdump-howto.txt b/kexec-kdump-howto.txt index 78ebf69..bb905d3 100644 --- a/kexec-kdump-howto.txt +++ b/kexec-kdump-howto.txt @@ -543,6 +543,9 @@ It is possible to specify a custom script or binary you wish to run following an attempt to capture a vmcore. The executable is passed an exit code from the capture process, which can be used to trigger different actions from within your post-capture executable. +If /etc/kdump/post.d directory is exist, All files in the directory are +collectively sorted and executed in lexical order, before binary or script +specified kdump_post parameter is executed. Kdump Pre-Capture Executable ---------------------------- @@ -551,6 +554,11 @@ It is possible to specify a custom script or binary you wish to run before capturing a vmcore. Exit status of this binary is interpreted: 0 - continue with dump process as usual non 0 - reboot the system +If /etc/kdump/pre.d directory exists, all files in the directory are collectively +sorted and executed in lexical order, after binary or script specified +kdump_pre parameter is executed. +Even if the binary or script in /etc/kdump/pre.d directory returns non 0 +exit status, the processing is continued. Extra Binaries -------------- -- 2.7.5

1 0

[PATCH 0/2] Fix kdump issues with UUID= or LABEL= config style
by Kairui Song 16 Jun '20

16 Jun '20

Previous patch series: [PATCH v2 0/7] Add support for unmounted dump target assumed get_persistent_dev accepts any block target config format. But it doesn't recognize the UUID= or LABEL= format. So always use the wrapper version for kdump which supports it well. Also fix a nfs detection issue introduced the that patch series. Kairui Song (2): Always wrap up call to dracut get_persistent_dev function mkdumprd: Fix nfs detection in to_mount dracut-module-setup.sh | 20 +++----------------- kdump-lib.sh | 14 ++++++++++++++ kdumpctl | 2 +- mkdumprd | 6 +++--- 4 files changed, 21 insertions(+), 21 deletions(-) -- 2.26.2

2 6

[PATCH] Fix kdump failure when mount target specified by dracut_args
by Kairui Song 15 Jun '20

15 Jun '20

commit 61e0169 changed definition of dump_fs function, so need to do a mount target conversion before calling it. Signed-off-by: Kairui Song <kasong(a)redhat.com> --- dracut-kdump.sh | 5 ++++- 1 file changed, 4 insertions(+), 1 deletion(-) diff --git a/dracut-kdump.sh b/dracut-kdump.sh index 9c8f3a9..b71278d 100755 --- a/dracut-kdump.sh +++ b/dracut-kdump.sh @@ -208,7 +208,10 @@ read_kdump_conf() case "$config_opt" in dracut_args) config_val=$(get_dracut_args_target "$config_val") - [ -n "$config_val" ] && add_dump_code "dump_fs $config_val" + if [ -n "$config_val" ]; then + config_val=$(get_mntpoint_from_target "$config_val") + add_dump_code "dump_fs $config_val" + fi ;; ext[234]|xfs|btrfs|minix|nfs) config_val=$(get_mntpoint_from_target "$config_val") -- 2.26.2

2 1

[PATCH] mkdumprd: Fix dracut error on multiple extra_modules
by Kairui Song 15 Jun '20

15 Jun '20

Dracut expects --add-drivers with a single parameter, so mkdumprd should quota the module list. Signed-off-by: Kairui Song <kasong(a)redhat.com> --- mkdumprd | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/mkdumprd b/mkdumprd index 1bee98c..7bc1bd1 100644 --- a/mkdumprd +++ b/mkdumprd @@ -471,7 +471,7 @@ handle_default_dump_target if [ -n "$extra_modules" ] then - add_dracut_arg "--add-drivers" "$extra_modules" + add_dracut_arg "--add-drivers" \"$extra_modules\" fi if ! is_fadump_capable; then -- 2.26.2

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kexec June 2020