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kdumpctl: Add reload support 

Add reload support to kdumpctl, reload will simply unload current
loaded kexec crash kernel and initramfs, and load it again.

Changes in /etc/sysconfig/kdump will take effect with kdumpctl
reload, but reloading will not check the content of
/etc/kdump.conf and won't rebuild anything. reload is fast, the only
time-consuming part of kdumpctl reload is loading kernel and initramfs
with kexec which is always necessary.

Signed-off-by: Kairui Song <kasong@redhat.com>
Acked-by: Dave Young <dyoung@redhat.com>
This commit is contained in:
Kairui Song 2018-10-23 22:13:28 +08:00
parent 80357ee9b4
commit b34ce3a7b4
2 changed files with 51 additions and 9 deletions
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1
kdump.service
View File

@ -7,6 +7,7 @@ DefaultDependencies=no
Type=oneshot
ExecStart=/usr/bin/kdumpctl start
ExecStop=/usr/bin/kdumpctl stop
ExecReload=/usr/bin/kdumpctl reload
RemainAfterExit=yes
StartLimitInterval=0

59
kdumpctl
View File

@ -283,6 +283,16 @@ get_pcs_cluster_modified_files()
setup_initrd()
{
KDUMP_BOOTDIR=$(check_boot_dir "${KDUMP_BOOTDIR}")
if [ -z "$KDUMP_KERNELVER" ]; then
kdump_kver=`uname -r`
else
kdump_kver=$KDUMP_KERNELVER
fi
kdump_kernel="${KDUMP_BOOTDIR}/${KDUMP_IMG}-${kdump_kver}${KDUMP_IMG_EXT}"
DEFAULT_INITRD="${KDUMP_BOOTDIR}/initramfs-`uname -r`.img"
DEFAULT_INITRD_BAK="${KDUMP_BOOTDIR}/.initramfs-`uname -r`.img.default"
if [ $DEFAULT_DUMP_MODE == "fadump" ]; then
@ -533,16 +543,8 @@ check_rebuild()
local _force_no_rebuild force_no_rebuild="0"
local ret system_modified="0"
KDUMP_BOOTDIR=$(check_boot_dir "${KDUMP_BOOTDIR}")
if [ -z "$KDUMP_KERNELVER" ]; then
kdump_kver=`uname -r`
else
kdump_kver=$KDUMP_KERNELVER
fi
kdump_kernel="${KDUMP_BOOTDIR}/${KDUMP_IMG}-${kdump_kver}${KDUMP_IMG_EXT}"
setup_initrd
if [ $? -ne 0 ]; then
return 1
fi
@ -1004,6 +1006,42 @@ start()
echo "Starting kdump: [OK]"
}
reload()
{
check_current_status
if [ $? -ne 0 ]; then
echo "Kdump is not running: [WARNING]"
return 0
fi
if [ $DEFAULT_DUMP_MODE == "fadump" ]; then
stop_fadump
else
stop_kdump
fi
if [ $? -ne 0 ]; then
echo "Stopping kdump: [FAILED]"
return 1
fi
echo "Stopping kdump: [OK]"
setup_initrd
if [ $? -ne 0 ]; then
echo "Starting kdump: [FAILED]"
return 1
fi
start_dump
if [ $? -ne 0 ]; then
echo "Starting kdump: [FAILED]"
return 1
fi
echo "Starting kdump: [OK]"
}
stop_fadump()
{
echo 0 > $FADUMP_REGISTER_SYS_NODE
@ -1087,6 +1125,9 @@ main ()
esac
exit $EXIT_CODE
;;
reload)
reload
;;
restart)
stop
start