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Add kdump support for Aboot platforms (sonic-net#824)
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@byu343
byu343 committed Mar 12, 2020
1 parent c5c5ffc commit 7105400
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Showing 2 changed files with 63 additions and 108 deletions.
19 changes: 12 additions & 7 deletions scripts/reboot
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Original file line number Diff line number Diff line change
@@ -1,12 +1,5 @@
#!/bin/bash

# Reboot immediately if we run the kdump capture kernel
VMCORE_FILE=/proc/vmcore
if [ -e $VMCORE_FILE -a -s $VMCORE_FILE ]; then
debug "We have a /proc/vmcore, then we just kdump'ed"
/sbin/reboot
fi

REBOOT_USER=$(logname)
REBOOT_TIME=$(date)
PLATFORM=$(sonic-cfggen -H -v DEVICE_METADATA.localhost.platform)
Expand All @@ -25,6 +18,18 @@ function debug()
logger "$@"
}

# Reboot immediately if we run the kdump capture kernel
VMCORE_FILE=/proc/vmcore
if [ -e $VMCORE_FILE -a -s $VMCORE_FILE ]; then
debug "We have a /proc/vmcore, then we just kdump'ed"
if [ -x ${DEVPATH}/${PLATFORM}/${PLAT_REBOOT} ]; then
VERBOSE=yes debug "Rebooting with platform ${PLATFORM} specific tool ..."
exec ${DEVPATH}/${PLATFORM}/${PLAT_REBOOT}
else
/sbin/reboot
fi
fi

function stop_sonic_services()
{
if [[ x"$ASIC_TYPE" != x"mellanox" ]]; then
Expand Down
152 changes: 51 additions & 101 deletions scripts/sonic-kdump-config
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Original file line number Diff line number Diff line change
Expand Up @@ -25,8 +25,10 @@ import subprocess
import errno
from swsssdk import ConfigDBConnector

aboot_cfg_template ="/host/image-%s/kernel-cmdline"
grub_cfg = "/host/grub/grub.cfg"
kdump_cfg = "/etc/default/kdump-tools"
machine_cfg = "/host/machine.conf"

## Same as print(), but output to stderr instead of stdout
def print_err(*args):
Expand Down Expand Up @@ -94,7 +96,7 @@ def get_next_image():

## Search for Current/Next SONiC image in grub configuration
#
# @param lines Lines read from grub.cfg file
# @param lines Lines read from grub.cfg/cmdline file
# @param img String we are looking for ("loop=image...")
# @return Index in lines array wehere we found the string
def locate_image(lines, img):
Expand All @@ -106,11 +108,11 @@ def locate_image(lines, img):
pass
return -1

## Rewrite grub configuration file
## Rewrite grub/cmdline configuration file
#
# @param lines Lines read from grub.cfg file
# @param fname Grub configuration file
def rewrite_grub_cfg(lines, fname):
# @param lines Lines read from grub/cmdline config file
# @param fname Grub/cmdline configuration file
def rewrite_cfg(lines, fname):
fd = open(fname, "w")
for x in lines:
fd.writelines(x+'\n')
Expand Down Expand Up @@ -254,50 +256,49 @@ def write_num_dumps(num_dumps):
print_err("Error while writing KDUMP_NUM_DUMPS into %s" % kdump_cfg)
sys.exit(1)

## Command: Enable kdump - Grub mode
## Enable kdump
#
# @param verbose If True, the function will display a few additinal information
# @return True is the grub configuration has changed, and False if it has not
def kdump_enable_grub(verbose, kdump_enabled, memory, num_dumps):
# @return True if the grub/cmdline cfg has changed, and False if it has not
def kdump_enable(verbose, kdump_enabled, memory, num_dumps, image, cmdline_file):

current_img = get_current_image();
if verbose:
print("Current image=[%s]" % current_img)
print("Enabling kdump for image=[%s]" % image)
try:
lines = [line.rstrip('\n') for line in open(grub_cfg)]
lines = [line.rstrip('\n') for line in open(cmdline_file)]
except Exception as exception:
print_err(exception)
sys.exit(1)
current_img_index = locate_image(lines, "loop=image-"+current_img)
img_index = locate_image(lines, "loop=image-"+image)
if verbose:
print("Image index in grub.cfg=%d" % current_img_index)
print("Image index in %s=%d" % (cmdline_file, img_index))

changed = False
crash_kernel_in_cmdline = search_for_crash_kernel_in_cmdline()
if verbose:
print("crash_kernel_in_cmdline=[%s]" % crash_kernel_in_cmdline)
curr_crash_kernel_mem = search_for_crash_kernel(lines[current_img_index])
crash_kernel_mem = search_for_crash_kernel(lines[img_index])
if verbose:
print("curr_crash_kernel_mem=[%s]" % curr_crash_kernel_mem)
if curr_crash_kernel_mem == None:
lines[current_img_index] += " crashkernel=%s" % memory
print("crash_kernel_mem=[%s]" % crash_kernel_mem)
if crash_kernel_mem == None:
lines[img_index] += " crashkernel=%s" % memory
changed = True
if verbose:
print("Added to grub.cfg: [ crashkernel=%s ]" % memory)
print("Added to %s: [ crashkernel=%s ]" % (cmdline_file, memory))
else:
if curr_crash_kernel_mem == memory:
if curr_crash_kernel_mem == crash_kernel_in_cmdline:
if crash_kernel_mem == memory:
if crash_kernel_mem == crash_kernel_in_cmdline:
print("kdump is already enabled")
else:
changed = True
else:
lines[current_img_index] = lines[current_img_index].replace(curr_crash_kernel_mem, memory)
lines[img_index] = lines[img_index].replace(crash_kernel_mem, memory)
changed = True
if verbose:
print("Replace [%s] with [%s] in grub.cfg" % (curr_crash_kernel_mem, memory))
print("Replace [%s] with [%s] in %s" % (crash_kernel_mem, memory, cmdline_file))

if changed:
rewrite_grub_cfg(lines, grub_cfg)
rewrite_cfg(lines, cmdline_file)

write_use_kdump(1)

Expand All @@ -306,8 +307,9 @@ def kdump_enable_grub(verbose, kdump_enabled, memory, num_dumps):
## Command: Enable kdump
#
# @param verbose If True, the function will display a few additinal information
# @return True is the grub configuration has changed, and False if it has not
def cmd_kdump_enable(verbose):
# @param image The image on which kdump settings are changed
# @return True if the grub/cmdline cfg has changed, and False if it has not
def cmd_kdump_enable(verbose, image=get_current_image()):

kdump_enabled = get_kdump_administrative_mode()
memory = get_kdump_memory()
Expand All @@ -316,107 +318,51 @@ def cmd_kdump_enable(verbose):
print("configDB: kdump_enabled=%d memory=[%s] num_nums=%d" % (kdump_enabled, memory, num_dumps))

if os.path.exists(grub_cfg):
return kdump_enable_grub(verbose, kdump_enabled, memory, num_dumps)
return kdump_enable(verbose, kdump_enabled, memory, num_dumps, image, grub_cfg)
elif open(machine_cfg, 'r').read().find('aboot_platform') >= 0:
aboot_cfg = aboot_cfg_template % image
return kdump_enable(verbose, kdump_enabled, memory, num_dumps, image, aboot_cfg)
else:
print("Feature not supported on this platform")
run_command("config kdump disable", use_shell=False);
return False

## Command: Enable kdump on Next image only - Grub mode
#
# @param verbose If True, the function will display a few additional information
# @return True is the grub configuration has changed, and False if it has not
def kdump_config_next_grub(verbose, kdump_enabled, memory, num_dumps):
next_img = get_next_image();
if verbose:
print("Next image=[%s]" % next_img)
try:
lines = [line.rstrip('\n') for line in open(grub_cfg)]
except Exception as exception:
print_err(exception)
sys.exit(1)
next_img_index = locate_image(lines, "loop=image-"+next_img)
if verbose:
print("Image index in grub.cfg=%d" % next_img_index)

changed = False
crash_kernel_in_cmdline = search_for_crash_kernel_in_cmdline()
if verbose:
print("crash_kernel_in_cmdline=[%s]" % crash_kernel_in_cmdline)
curr_crash_kernel_mem = search_for_crash_kernel(lines[next_img_index])
if verbose:
print("curr_crash_kernel_mem=[%s]" % curr_crash_kernel_mem)
if curr_crash_kernel_mem == None:
lines[next_img_index] += " crashkernel=%s" % memory
changed = True
if verbose:
print("Added to grub.cfg: [ crashkernel=%s ]" % memory)
else:
if curr_crash_kernel_mem == memory:
if curr_crash_kernel_mem == crash_kernel_in_cmdline:
print("kdump is already enabled")
else:
changed = True
else:
lines[next_img_index] = lines[next_img_index].replace(curr_crash_kernel_mem, memory)
changed = True
if verbose:
print("Replace [%s] with [%s] in grub.cfg" % (curr_crash_kernel_mem, memory))

if changed:
rewrite_grub_cfg(lines, grub_cfg)

write_use_kdump(1)

return changed

## Command: Enable kdump on Next image only
#
# @param verbose If True, the function will display a few additional information
# @return True is the grub configuration has changed, and False if it has not
# @param image The image on which kdump settings are changed
# @return True if the grub/cmdline cfg has changed, and False if it has not
def cmd_kdump_config_next(verbose):
return cmd_kdump_enable(verbose, image=get_next_image())

kdump_enabled = get_kdump_administrative_mode()
memory = get_kdump_memory()
num_dumps = get_kdump_num_dumps()
if verbose:
print("configDB: kdump_enabled=%d memory=[%s] num_nums=%d" % (kdump_enabled, memory, num_dumps))

if os.path.exists(grub_cfg):
return kdump_config_next_grub(verbose, kdump_enabled, memory, num_dumps)
else:
return False

## Command: Disable kdump - Grub mode
## Disable kdump
#
# @param verbose If True, the function will display a few additional information
def kdump_disable_grub(verbose, kdump_enabled, memory, num_dumps):
def kdump_disable(verbose, kdump_enabled, memory, num_dumps, image, cmdline_file):
write_use_kdump(0)

current_img = get_current_image();
if verbose:
print("Current image=[%s]\n" % current_img)
lines = [line.rstrip('\n') for line in open(grub_cfg)]
current_img_index = locate_image(lines, "loop=image-"+current_img)
print("Disabling kdump for image=[%s]\n" % image)
lines = [line.rstrip('\n') for line in open(cmdline_file)]
img_index = locate_image(lines, "loop=image-"+image)

changed = False
curr_crash_kernel_mem = search_for_crash_kernel(lines[current_img_index])
if curr_crash_kernel_mem == None:
crash_kernel_mem = search_for_crash_kernel(lines[img_index])
if crash_kernel_mem == None:
print("kdump is already disabled")
else:
lines[current_img_index] = lines[current_img_index].replace("crashkernel="+curr_crash_kernel_mem, "")
lines[img_index] = lines[img_index].replace("crashkernel="+crash_kernel_mem, "")
changed = True
if verbose:
print("Removed [%s] in grub.cfg" % ("crashkernel="+curr_crash_kernel_mem))
print("Removed [%s] in %s" % ("crashkernel="+crash_kernel_mem, cmdline_file))

if changed:
rewrite_grub_cfg(lines, grub_cfg)

rewrite_cfg(lines, cmdline_file)

## Command: Disable kdump
#
# @param verbose If True, the function will display a few additional information
def cmd_kdump_disable(verbose):
# @param image The image on which kdump settings are changed
def cmd_kdump_disable(verbose, image=get_current_image()):

kdump_enabled = get_kdump_administrative_mode()
memory = get_kdump_memory()
Expand All @@ -425,8 +371,12 @@ def cmd_kdump_disable(verbose):
print("configDB: kdump_enabled=%d memory=[%s] num_nums=%d" % (kdump_enabled, memory, num_dumps))

if os.path.exists(grub_cfg):
return kdump_disable_grub(verbose, kdump_enabled, memory, num_dumps)
return kdump_disable(verbose, kdump_enabled, memory, num_dumps, image, grub_cfg)
elif open(machine_cfg, 'r').read().find('aboot_platform') >= 0:
aboot_cfg = aboot_cfg_template % image
return kdump_disable(verbose, kdump_enabled, memory, num_dumps, image, aboot_cfg)
else:
print("Feature not supported on this platform")
return False

## Command: Set / Get memory
Expand Down

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