139 lines
2.5 KiB
Bash
Executable File
139 lines
2.5 KiB
Bash
Executable File
#! /bin/sh
|
|
# blktrace Mount debugfs on boot
|
|
|
|
### BEGIN INIT INFO
|
|
# Provides: mountdebugfs
|
|
# Required-Start: $local_fs $remote_fs mountkernfs
|
|
# Required-Stop: $local_fs $remote_fs
|
|
# Should-Start:
|
|
# Should-Stop:
|
|
# Default-Start: 2 3 4 5
|
|
# Default-Stop: 0 1 6
|
|
# Short-Description: Mount debugfs on /sys/kernel/debug
|
|
# Description: Mount debugfs on /sys/kernel/debug
|
|
### END INIT INFO
|
|
|
|
# load LSB functions (log_success_msg etc)
|
|
. /lib/lsb/init-functions
|
|
|
|
# main mount point
|
|
mount_dir=/sys/kernel/debug
|
|
|
|
# check if /proc/mounts exists
|
|
if ! [ -r /proc/mounts ]
|
|
then
|
|
log_failure_msg "Failed! Couldn't read /proc/mounts."
|
|
exit 1
|
|
fi
|
|
|
|
# no need to do anything if blktrace isn't installed
|
|
if ! [ -x /usr/sbin/blktrace ]
|
|
then
|
|
exit 0
|
|
fi
|
|
|
|
# find where (if anywhere) debugfs is mounted
|
|
mountpoints=$(
|
|
awk '$3 == "debugfs" { print $2 }' < /proc/mounts
|
|
)
|
|
|
|
mount_debugfs ()
|
|
{
|
|
# check if any of the current mountpoints is /sys/kernel/debug
|
|
found_syskerneldebug=0
|
|
for d in $mountpoints
|
|
do
|
|
if [ $d = $mount_dir ]
|
|
then
|
|
found_syskerneldebug=1
|
|
fi
|
|
done
|
|
if [ $found_syskerneldebug -eq 1 ]
|
|
then
|
|
log_success_msg "Debugfs is already mounted on $mount_dir; nothing to do";
|
|
exit 0
|
|
fi
|
|
|
|
# check that debugfs is supported by the kernel
|
|
if ! [ $( awk -F\\t '$2 == "debugfs" { print $2 }' < /proc/filesystems ) ]
|
|
then
|
|
log_failure_msg "Can't mount debugfs: not supported by your kernel"
|
|
exit 0
|
|
fi
|
|
|
|
# check that /sys/kernel exists
|
|
the_dir=$( dirname $mount_dir )
|
|
if ! [ -d $the_dir ]
|
|
then
|
|
log_failure_msg "Can't mount debugfs on $mountdir: $the_dir doesn't exist."
|
|
exit 1
|
|
fi
|
|
|
|
# do the actual mounting
|
|
if mount -t debugfs debugfs $mount_dir
|
|
then
|
|
log_success_msg "Mounted debugfs on $mount_dir"
|
|
else
|
|
log_failure_msg "Couldn't mount debugfs on $mount_dir"
|
|
exit 1
|
|
fi
|
|
|
|
}
|
|
|
|
umount_debugfs ()
|
|
{
|
|
if [ $mountpoints ]
|
|
then
|
|
for d in $mountpoints
|
|
do
|
|
if [ $d = $mount_dir ]
|
|
then
|
|
if umount $d
|
|
then
|
|
log_success_msg "Unmounted debugfs from $d"
|
|
else
|
|
log_failure_msg "Couln't unmount debugfs from $d"
|
|
fi
|
|
fi
|
|
done
|
|
else
|
|
log_success_msg "Debugfs is not mounted; nothing to do."
|
|
fi
|
|
}
|
|
|
|
show_status ()
|
|
{
|
|
if [ $mountpoints ]
|
|
then
|
|
for d in $mountpoints
|
|
do
|
|
log_success_msg "Debugfs is mounted on $d"
|
|
done
|
|
else
|
|
log_success_msg "Debugfs is not mounted"
|
|
fi
|
|
}
|
|
|
|
|
|
case "$1" in
|
|
start)
|
|
mount_debugfs
|
|
;;
|
|
stop)
|
|
umount_debugfs
|
|
;;
|
|
restart|reload|force-reload)
|
|
umount_debugfs
|
|
exec $0 start
|
|
;;
|
|
status)
|
|
show_status
|
|
;;
|
|
*)
|
|
echo "Usage: $0 {start|stop|restart|reload|force-reload|status}"
|
|
exit 1
|
|
;;
|
|
esac
|
|
|
|
exit 0
|