kexec-tools/kdump-lib.sh
Pratyush Anand d1424f3f66 mkdumprd: move to_dev_name() & get_persistent_dev() to kdump-lib.sh
to_dev_name() and get_persistent_dev() can be used by function in kdumpctl.
Therefore moving them to kdump-lib.sh.

No functional changes.

Signed-off-by: Pratyush Anand <panand@redhat.com>
Acked-by: Xunlei Pang <xlpang@redhat.com>
Acked-by: Baoquan He <xlpang@redhat.com>
Acked-by: Dave Young <dyoung@redhat.com>
2016-05-12 09:53:51 +08:00

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#!/bin/sh
#
# Kdump common variables and functions
#
DEFAULT_PATH="/var/crash/"
FENCE_KDUMP_CONFIG_FILE="/etc/sysconfig/fence_kdump"
FENCE_KDUMP_SEND="/usr/libexec/fence_kdump_send"
perror_exit() {
echo $@ >&2
exit 1
}
perror() {
echo $@ >&2
}
is_ssh_dump_target()
{
grep -q "^ssh[[:blank:]].*@" /etc/kdump.conf
}
is_nfs_dump_target()
{
grep -q "^nfs" /etc/kdump.conf
}
is_raw_dump_target()
{
grep -q "^raw" /etc/kdump.conf
}
is_fs_type_nfs()
{
local _fstype=$1
[ $_fstype = "nfs" ] || [ $_fstype = "nfs4" ] && return 0
return 1
}
is_fs_dump_target()
{
egrep -q "^ext[234]|^xfs|^btrfs|^minix" /etc/kdump.conf
}
is_user_configured_dump_target()
{
return $(is_ssh_dump_target || is_nfs_dump_target || is_raw_dump_target || is_fs_dump_target)
}
strip_comments()
{
echo $@ | sed -e 's/\(.*\)#.*/\1/'
}
# Check if fence kdump is configured in Pacemaker cluster
is_pcs_fence_kdump()
{
# no pcs or fence_kdump_send executables installed?
type -P pcs > /dev/null || return 1
[ -x $FENCE_KDUMP_SEND ] || return 1
# fence kdump not configured?
(pcs cluster cib | grep -q 'type="fence_kdump"') &> /dev/null || return 1
}
# Check if fence_kdump is configured using kdump options
is_generic_fence_kdump()
{
[ -x $FENCE_KDUMP_SEND ] || return 1
grep -q "^fence_kdump_nodes" /etc/kdump.conf
}
to_dev_name() {
local dev="${1//\"/}"
case "$dev" in
UUID=*)
dev=`blkid -U "${dev#UUID=}"`
;;
LABEL=*)
dev=`blkid -L "${dev#LABEL=}"`
;;
esac
echo $dev
}
get_persistent_dev() {
local i _tmp _dev _lookup_dirs
_dev=$(udevadm info --query=name --name="$1" 2>/dev/null)
[ -z "$_dev" ] && {
perror_exit "Kernel dev name of $1 is not found."
}
if [[ $2 = "raw" ]];then
_lookup_dirs="/dev/mapper/* /dev/disk/by-id/*"
else
_lookup_dirs="/dev/mapper/* /dev/disk/by-uuid/* /dev/disk/by-id/*"
fi
for i in $_lookup_dirs; do
_tmp=$(udevadm info --query=name --name="$i" 2>/dev/null)
if [ "$_tmp" = "$_dev" ]; then
echo $i
return
fi
done
perror "WARNING: Persistent device name of $1 not found. Using $1 as dump target name"
echo $1
}
get_user_configured_dump_disk()
{
local _target
if is_ssh_dump_target || is_nfs_dump_target; then
return
fi
_target=$(egrep "^ext[234]|^xfs|^btrfs|^minix|^raw" /etc/kdump.conf 2>/dev/null |awk '{print $2}')
[ -n "$_target" ] && echo $_target
return
}
get_root_fs_device()
{
local _target
_target=$(findmnt -k -f -n -o SOURCE /)
[ -n "$_target" ] && echo $_target
return
}
# findmnt uses the option "-v, --nofsroot" to exclusive the [/dir]
# in the SOURCE column for bind-mounts, then if $_mntpoint equals to
# $_mntpoint_nofsroot, the mountpoint is not bind mounted directory.
is_bind_mount()
{
local _mntpoint=$(findmnt $1 | tail -n 1 | awk '{print $2}')
local _mntpoint_nofsroot=$(findmnt -v $1 | tail -n 1 | awk '{print $2}')
if [[ $_mntpoint = $_mntpoint_nofsroot ]]; then
return 1
else
return 0
fi
}
# Below is just an example for mount info
# /dev/mapper/atomicos-root[/ostree/deploy/rhel-atomic-host/var], if the
# directory is bind mounted. The former part represents the device path, rest
# part is the bind mounted directory which quotes by bracket "[]".
get_bind_mount_directory()
{
local _mntpoint=$(findmnt $1 | tail -n 1 | awk '{print $2}')
local _mntpoint_nofsroot=$(findmnt -v $1 | tail -n 1 | awk '{print $2}')
_mntpoint=${_mntpoint#*$_mntpoint_nofsroot}
_mntpoint=${_mntpoint#[}
_mntpoint=${_mntpoint%]}
echo $_mntpoint
}
get_mntpoint_from_path()
{
echo $(df $1 | tail -1 | awk '{print $NF}')
}
get_target_from_path()
{
echo $(df $1 | tail -1 | awk '{print $1}')
}
get_fs_type_from_target()
{
echo $(findmnt -k -f -n -r -o FSTYPE $1)
}
# input: device path
# output: the general mount point
# find the general mount point, not the bind mounted point in atomic
# As general system, Use the previous code
#
# ERROR and EXIT:
# the device can be umounted the general mount point, if one of the mount point is bind mounted
# For example:
# mount /dev/sda /mnt/
# mount -o bind /mnt/var /var
# umount /mnt
get_mntpoint_from_target()
{
if is_atomic; then
for _mnt in $(findmnt -k -n -r -o TARGET $1)
do
if ! is_bind_mount $_mnt; then
echo $_mnt
return
fi
done
echo "Mount $1 firstly, without the bind mode" >&2
exit 1
else
echo $(findmnt -k -f -n -r -o TARGET $1)
fi
}
# get_option_value <option_name>
# retrieves value of option defined in kdump.conf
get_option_value() {
echo $(strip_comments `grep "^$1[[:space:]]\+" /etc/kdump.conf | tail -1 | cut -d\ -f2-`)
}
#This function compose a absolute path with the mount
#point and the relative $SAVE_PATH.
#target is passed in as argument, could be UUID, LABEL,
#block device or even nfs server export of the form of
#"my.server.com:/tmp/export"?
#And possibly this could be used for both default case
#as well as when dump taret is specified. When dump
#target is not specified, then $target would be null.
make_absolute_save_path()
{
local _target=$1
local _mnt
[ -n $_target ] && _mnt=$(get_mntpoint_from_target $1)
_mnt="${_mnt}/$SAVE_PATH"
# strip the duplicated "/"
echo "$_mnt" | tr -s /
}
check_save_path_fs()
{
local _path=$1
if [ ! -d $_path ]; then
perror_exit "Dump path $_path does not exist."
fi
}
is_atomic()
{
grep -q "ostree" /proc/cmdline
}
is_ipv6_address()
{
echo $1 | grep -q ":"
}
# get ip address or hostname from nfs/ssh config value
get_remote_host()
{
local _config_val=$1
# ipv6 address in kdump.conf is around with "[]",
# factor out the ipv6 address
_config_val=${_config_val#*@}
_config_val=${_config_val%:/*}
_config_val=${_config_val#[}
_config_val=${_config_val%]}
echo $_config_val
}
is_hostname()
{
local _hostname=`echo $1 | grep ":"`
if [ -n "$_hostname" ]; then
return 1
fi
echo $1 | grep -q "[a-zA-Z]"
}