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kdump: Modify status routine to check for firmware-assisted dump

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This patch enables kdump script to  check if firmware-assisted dump is
enabled or not by reading value from '/sys/kernel/fadump_enabled'. The
determine_dump_mode() routine sets dump_mode to 'fadump', if fadump is
enabled. By default, dump_mode is set to 'kdump' mode.

Modify status routine to check if firmware assisted dump is registered
or not by  reading value from '/sys/kernel/fadump_registered' file. If
it is set to '1' then return status=0 else return status=1.

    0  <= Firmware assisted is enabled and running
    1  <= Firmware assisted is enabled but not running

Signed-off-by: Mahesh Salgaonkar <mahesh@linux.vnet.ibm.com>
Signed-off-by: Hari Bathini <hbathini@linux.vnet.ibm.com>
Acked-by: Vivek Goyal <vgoyal@redhat.com>
This commit is contained in:
Hari Bathini 2014-07-25 00:08:36 +05:30 committed by WANG Chao
parent 0b63f4a522
commit e0e70085e1
1 changed files with 60 additions and 3 deletions
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63
kdumpctl
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@ -9,6 +9,10 @@ MKDUMPRD="/sbin/mkdumprd -f"
SAVE_PATH=/var/crash
SSH_KEY_LOCATION="/root/.ssh/kdump_id_rsa"
DUMP_TARGET=""
FADUMP_ENABLED_SYS_NODE="/sys/kernel/fadump_enabled"
FADUMP_REGISTER_SYS_NODE="/sys/kernel/fadump_registered"
#kdump shall be the default dump mode
DEFAULT_DUMP_MODE="kdump"
. /lib/kdump/kdump-lib.sh
@ -34,6 +38,16 @@ single_instance_lock()
done
}
determine_dump_mode()
{
# Check if firmware-assisted dump is enabled
# if yes, set the dump mode as fadump
if is_fadump_capable; then
echo "Dump mode is fadump"
DEFAULT_DUMP_MODE="fadump"
fi
}
# remove_cmdline_param <kernel cmdline> <param1> [<param2>] ... [<paramN>]
# Remove a list of kernel parameters from a given kernel cmdline and print the result.
# For each "arg" in the removing params list, "arg" and "arg=xxx" will be removed if exists.
@ -436,6 +450,25 @@ propagate_ssh_key()
fi
}
is_fadump_capable()
{
# Check if firmware-assisted dump is enabled
# if no, fallback to kdump check
if [ -f $FADUMP_ENABLED_SYS_NODE ]; then
rc=`cat $FADUMP_ENABLED_SYS_NODE`
[ $rc -eq 1 ] && return 0
fi
return 1
}
check_current_fadump_status()
{
# Check if firmware-assisted dump has been registered.
rc=`cat $FADUMP_REGISTER_SYS_NODE`
[ $rc -eq 1 ] && return 0
return 1
}
check_current_kdump_status()
{
rc=`cat /sys/kernel/kexec_crash_loaded`
@ -446,6 +479,17 @@ check_current_kdump_status()
fi
}
check_current_status()
{
if [ $DEFAULT_DUMP_MODE == "fadump" ]; then
check_current_fadump_status
else
check_current_kdump_status
fi
return $?
}
save_raw()
{
local kdump_dir
@ -608,6 +652,16 @@ check_fence_kdump_config()
return 0
}
check_dump_feasibility()
{
if [ $DEFAULT_DUMP_MODE == "fadump" ]; then
return 0
fi
check_kdump_feasibility
return $?
}
start()
{
check_config
@ -625,13 +679,13 @@ start()
return 1
fi
check_kdump_feasibility
check_dump_feasibility
if [ $? -ne 0 ]; then
echo "Starting kdump: [FAILED]"
return 1
fi
check_current_kdump_status
check_current_status
if [ $? == 0 ]; then
echo "Kdump already running: [WARNING]"
return 0
@ -679,6 +733,9 @@ fi
main ()
{
# Determine if the dump mode is kdump or fadump
determine_dump_mode
case "$1" in
start)
if [ -s /proc/vmcore ]; then
@ -693,7 +750,7 @@ main ()
;;
status)
EXIT_CODE=0
check_current_kdump_status
check_current_status
case "$?" in
0)
echo "Kdump is operational"