2f4149f276
Kdump always use _proto=dhcp for both ipv4 and ipv6. But for ipv6 the dhcp address assignment is not like ipv4, there are different ways for it, stateless and stateful, see below document: https://fedoraproject.org/wiki/IPv6Guide In case stateless, kernel can do the address assignment, dracut use _proto=auto6; for stateful case, dracut use _proto=dhcp6. We do not see bug reports before because for the most auto6 cases kernel assign ip address before dhclient, kdump just happened to work. Here we use auto6 if possible first. And we take the assumption that host use auto6 if /proc/sys/net/ipv6/conf/$netdev/autoconf is enabled Signed-off-by: Pingfan Liu <piliu@redhat.com>
500 lines
12 KiB
Bash
Executable File
500 lines
12 KiB
Bash
Executable File
#!/bin/sh
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#
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# Kdump common variables and functions
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#
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DEFAULT_PATH="/var/crash/"
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FENCE_KDUMP_CONFIG_FILE="/etc/sysconfig/fence_kdump"
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FENCE_KDUMP_SEND="/usr/libexec/fence_kdump_send"
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FADUMP_ENABLED_SYS_NODE="/sys/kernel/fadump_enabled"
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is_fadump_capable()
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{
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# Check if firmware-assisted dump is enabled
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# if no, fallback to kdump check
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if [ -f $FADUMP_ENABLED_SYS_NODE ]; then
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rc=`cat $FADUMP_ENABLED_SYS_NODE`
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[ $rc -eq 1 ] && return 0
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fi
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return 1
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}
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perror_exit() {
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echo $@ >&2
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exit 1
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}
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perror() {
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echo $@ >&2
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}
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is_ssh_dump_target()
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{
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grep -q "^ssh[[:blank:]].*@" /etc/kdump.conf
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}
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is_nfs_dump_target()
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{
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grep -q "^nfs" /etc/kdump.conf || \
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[[ $(get_dracut_args_fstype "$(grep "^dracut_args .*\-\-mount" /etc/kdump.conf)") = nfs* ]]
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}
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is_raw_dump_target()
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{
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grep -q "^raw" /etc/kdump.conf
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}
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is_fs_type_nfs()
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{
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local _fstype=$1
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[ $_fstype = "nfs" ] || [ $_fstype = "nfs4" ] && return 0
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return 1
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}
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is_fs_dump_target()
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{
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egrep -q "^ext[234]|^xfs|^btrfs|^minix" /etc/kdump.conf
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}
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strip_comments()
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{
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echo $@ | sed -e 's/\(.*\)#.*/\1/'
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}
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# Check if fence kdump is configured in Pacemaker cluster
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is_pcs_fence_kdump()
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{
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# no pcs or fence_kdump_send executables installed?
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type -P pcs > /dev/null || return 1
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[ -x $FENCE_KDUMP_SEND ] || return 1
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# fence kdump not configured?
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(pcs cluster cib | grep 'type="fence_kdump"') &> /dev/null || return 1
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}
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# Check if fence_kdump is configured using kdump options
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is_generic_fence_kdump()
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{
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[ -x $FENCE_KDUMP_SEND ] || return 1
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grep -q "^fence_kdump_nodes" /etc/kdump.conf
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}
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to_dev_name() {
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local dev="${1//\"/}"
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case "$dev" in
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UUID=*)
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dev=`blkid -U "${dev#UUID=}"`
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;;
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LABEL=*)
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dev=`blkid -L "${dev#LABEL=}"`
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;;
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esac
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echo $dev
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}
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is_user_configured_dump_target()
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{
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return $(is_mount_in_dracut_args || is_ssh_dump_target || is_nfs_dump_target || \
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is_raw_dump_target || is_fs_dump_target)
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}
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get_user_configured_dump_disk()
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{
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local _target
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_target=$(egrep "^ext[234]|^xfs|^btrfs|^minix|^raw" /etc/kdump.conf 2>/dev/null |awk '{print $2}')
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[ -n "$_target" ] && echo $_target && return
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_target=$(get_dracut_args_target "$(grep "^dracut_args .*\-\-mount" /etc/kdump.conf)")
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[ -b "$_target" ] && echo $_target
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}
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get_root_fs_device()
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{
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local _target
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_target=$(findmnt -k -f -n -o SOURCE /)
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[ -n "$_target" ] && echo $_target
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return
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}
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get_save_path()
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{
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local _save_path=$(grep "^path" /etc/kdump.conf|awk '{print $2}')
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if [ -z "$_save_path" ]; then
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_save_path=$DEFAULT_PATH
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fi
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echo $_save_path
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}
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get_block_dump_target()
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{
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local _target _path
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if is_ssh_dump_target || is_nfs_dump_target; then
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return
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fi
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_target=$(get_user_configured_dump_disk)
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[ -n "$_target" ] && echo $(to_dev_name $_target) && return
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# Get block device name from local save path
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_path=$(get_save_path)
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_target=$(get_target_from_path $_path)
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[ -b "$_target" ] && echo $(to_dev_name $_target)
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}
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is_dump_to_rootfs()
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{
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grep "^default[[:space:]]dump_to_rootfs" /etc/kdump.conf >/dev/null
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}
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get_default_action_target()
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{
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local _target
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if is_dump_to_rootfs; then
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# Get rootfs device name
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_target=$(get_root_fs_device)
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[ -b "$_target" ] && echo $(to_dev_name $_target) && return
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# Then, must be nfs root
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echo "nfs"
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fi
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}
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# Get kdump targets(including root in case of dump_to_rootfs).
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get_kdump_targets()
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{
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local _target _root
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local kdump_targets
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_target=$(get_block_dump_target)
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if [ -n "$_target" ]; then
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kdump_targets=$_target
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elif is_ssh_dump_target; then
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kdump_targets="ssh"
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else
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kdump_targets="nfs"
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fi
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# Add the root device if dump_to_rootfs is specified.
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_root=$(get_default_action_target)
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if [ -n "$_root" -a "$kdump_targets" != "$_root" ]; then
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kdump_targets="$kdump_targets $_root"
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fi
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echo "$kdump_targets"
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}
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# findmnt uses the option "-v, --nofsroot" to exclusive the [/dir]
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# in the SOURCE column for bind-mounts, then if $_mntpoint equals to
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# $_mntpoint_nofsroot, the mountpoint is not bind mounted directory.
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is_bind_mount()
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{
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local _mntpoint=$(findmnt $1 | tail -n 1 | awk '{print $2}')
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local _mntpoint_nofsroot=$(findmnt -v $1 | tail -n 1 | awk '{print $2}')
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if [[ $_mntpoint = $_mntpoint_nofsroot ]]; then
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return 1
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else
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return 0
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fi
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}
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# Below is just an example for mount info
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# /dev/mapper/atomicos-root[/ostree/deploy/rhel-atomic-host/var], if the
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# directory is bind mounted. The former part represents the device path, rest
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# part is the bind mounted directory which quotes by bracket "[]".
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get_bind_mount_directory()
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{
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local _mntpoint=$(findmnt $1 | tail -n 1 | awk '{print $2}')
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local _mntpoint_nofsroot=$(findmnt -v $1 | tail -n 1 | awk '{print $2}')
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_mntpoint=${_mntpoint#*$_mntpoint_nofsroot}
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_mntpoint=${_mntpoint#[}
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_mntpoint=${_mntpoint%]}
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echo $_mntpoint
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}
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get_mntpoint_from_path()
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{
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echo $(df $1 | tail -1 | awk '{print $NF}')
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}
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get_target_from_path()
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{
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local _target
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_target=$(df $1 2>/dev/null | tail -1 | awk '{print $1}')
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[[ "$_target" == "/dev/root" ]] && [[ ! -e /dev/root ]] && _target=$(get_root_fs_device)
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echo $_target
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}
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get_fs_type_from_target()
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{
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echo $(findmnt -k -f -n -r -o FSTYPE $1)
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}
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# input: device path
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# output: the general mount point
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# find the general mount point, not the bind mounted point in atomic
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# As general system, Use the previous code
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#
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# ERROR and EXIT:
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# the device can be umounted the general mount point, if one of the mount point is bind mounted
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# For example:
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# mount /dev/sda /mnt/
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# mount -o bind /mnt/var /var
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# umount /mnt
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get_mntpoint_from_target()
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{
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if is_atomic; then
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for _mnt in $(findmnt -k -n -r -o TARGET $1)
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do
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if ! is_bind_mount $_mnt; then
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echo $_mnt
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return
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fi
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done
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echo "Mount $1 firstly, without the bind mode" >&2
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exit 1
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else
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echo $(findmnt -k -f -n -r -o TARGET $1)
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fi
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}
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# get_option_value <option_name>
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# retrieves value of option defined in kdump.conf
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get_option_value() {
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echo $(strip_comments `grep "^$1[[:space:]]\+" /etc/kdump.conf | tail -1 | cut -d\ -f2-`)
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}
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#This function compose a absolute path with the mount
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#point and the relative $SAVE_PATH.
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#target is passed in as argument, could be UUID, LABEL,
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#block device or even nfs server export of the form of
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#"my.server.com:/tmp/export"?
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#And possibly this could be used for both default case
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#as well as when dump taret is specified. When dump
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#target is not specified, then $target would be null.
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make_absolute_save_path()
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{
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local _target=$1
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local _mnt
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[ -n $_target ] && _mnt=$(get_mntpoint_from_target $1)
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_mnt="${_mnt}/$SAVE_PATH"
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# strip the duplicated "/"
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echo "$_mnt" | tr -s /
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}
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check_save_path_fs()
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{
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local _path=$1
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if [ ! -d $_path ]; then
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perror_exit "Dump path $_path does not exist."
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fi
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}
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is_atomic()
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{
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grep -q "ostree" /proc/cmdline
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}
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# fixme, try the best to decide whether the ipv6 addr is allocated by slaac or dhcp6
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is_ipv6_auto()
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{
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local _netdev=$1
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local _auto=$(cat /proc/sys/net/ipv6/conf/$_netdev/autoconf)
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if [ $_auto -eq 1 ]; then
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return 0
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else
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return 1
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fi
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}
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is_ipv6_address()
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{
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echo $1 | grep -q ":"
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}
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# get ip address or hostname from nfs/ssh config value
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get_remote_host()
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{
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local _config_val=$1
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# ipv6 address in kdump.conf is around with "[]",
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# factor out the ipv6 address
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_config_val=${_config_val#*@}
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_config_val=${_config_val%:/*}
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_config_val=${_config_val#[}
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_config_val=${_config_val%]}
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echo $_config_val
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}
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is_hostname()
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{
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local _hostname=`echo $1 | grep ":"`
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if [ -n "$_hostname" ]; then
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return 1
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fi
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echo $1 | grep -q "[a-zA-Z]"
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}
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# Copied from "/etc/sysconfig/network-scripts/network-functions"
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get_hwaddr()
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{
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if [ -f "/sys/class/net/${1}/address" ]; then
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awk '{ print toupper($0) }' < /sys/class/net/${1}/address
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elif [ -d "/sys/class/net/${1}" ]; then
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LC_ALL= LANG= ip -o link show ${1} 2>/dev/null | \
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awk '{ print toupper(gensub(/.*link\/[^ ]* ([[:alnum:]:]*).*/,
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"\\1", 1)); }'
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fi
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}
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get_ifcfg_by_device()
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{
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grep -E -i -l "^[[:space:]]*DEVICE=\"*${1}\"*[[:space:]]*$" \
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/etc/sysconfig/network-scripts/ifcfg-* 2>/dev/null | head -1
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}
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get_ifcfg_by_hwaddr()
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{
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grep -E -i -l "^[[:space:]]*HWADDR=\"*${1}\"*[[:space:]]*$" \
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/etc/sysconfig/network-scripts/ifcfg-* 2>/dev/null | head -1
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}
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get_ifcfg_by_uuid()
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{
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grep -E -i -l "^[[:space:]]*UUID=\"*${1}\"*[[:space:]]*$" \
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/etc/sysconfig/network-scripts/ifcfg-* 2>/dev/null | head -1
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}
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get_ifcfg_by_name()
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{
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grep -E -i -l "^[[:space:]]*NAME=\"*${1}\"*[[:space:]]*$" \
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/etc/sysconfig/network-scripts/ifcfg-* 2>/dev/null | head -1
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}
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is_nm_running()
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{
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[ "$(LANG=C nmcli -t --fields running general status 2>/dev/null)" = "running" ]
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}
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is_nm_handling()
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{
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LANG=C nmcli -t --fields device,state dev status 2>/dev/null \
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| grep -q "^\(${1}:connected\)\|\(${1}:connecting.*\)$"
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}
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# $1: netdev name
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get_ifcfg_nmcli()
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{
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local nm_uuid nm_name
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local ifcfg_file
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# Get the active nmcli config name of $1
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if is_nm_running && is_nm_handling "${1}" ; then
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# The configuration "uuid" and "name" generated by nm is wrote to
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# the ifcfg file as "UUID=<nm_uuid>" and "NAME=<nm_name>".
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nm_uuid=$(LANG=C nmcli -t --fields uuid,device c show --active 2>/dev/null \
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| grep "${1}" | head -1 | cut -d':' -f1)
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nm_name=$(LANG=C nmcli -t --fields name,device c show --active 2>/dev/null \
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| grep "${1}" | head -1 | cut -d':' -f1)
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ifcfg_file=$(get_ifcfg_by_uuid "${nm_uuid}")
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[ -z "${ifcfg_file}" ] && ifcfg_file=$(get_ifcfg_by_name "${nm_name}")
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fi
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echo -n "${ifcfg_file}"
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}
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# $1: netdev name
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get_ifcfg_legacy()
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{
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local ifcfg_file
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ifcfg_file="/etc/sysconfig/network-scripts/ifcfg-${1}"
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[ -f "${ifcfg_file}" ] && echo -n "${ifcfg_file}" && return
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ifcfg_file=$(get_ifcfg_by_name "${1}")
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[ -f "${ifcfg_file}" ] && echo -n "${ifcfg_file}" && return
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local hwaddr=$(get_hwaddr "${1}")
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if [ -n "$hwaddr" ]; then
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ifcfg_file=$(get_ifcfg_by_hwaddr "${hwaddr}")
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[ -f "${ifcfg_file}" ] && echo -n "${ifcfg_file}" && return
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fi
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ifcfg_file=$(get_ifcfg_by_device "${1}")
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echo -n "${ifcfg_file}"
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}
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# $1: netdev name
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# Return the ifcfg file whole name(including the path) of $1 if any.
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get_ifcfg_filename() {
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local ifcfg_file
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ifcfg_file=$(get_ifcfg_nmcli "${1}")
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if [ -z "${ifcfg_file}" ]; then
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ifcfg_file=$(get_ifcfg_legacy "${1}")
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fi
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echo -n "${ifcfg_file}"
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}
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# returns 0 when omission of watchdog module is desired in dracut_args
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# returns 1 otherwise
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is_wdt_mod_omitted() {
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local dracut_args
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local ret=1
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dracut_args=$(grep "^dracut_args" /etc/kdump.conf)
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[[ -z $dracut_args ]] && return $ret
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eval set -- $dracut_args
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while :; do
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[[ -z $1 ]] && break
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case $1 in
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-o|--omit)
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echo $2 | grep -qw "watchdog"
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[[ $? == 0 ]] && ret=0
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break
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esac
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shift
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done
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return $ret
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}
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# If "dracut_args" contains "--mount" information, use it
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# directly without any check(users are expected to ensure
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# its correctness).
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is_mount_in_dracut_args()
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{
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grep -q "^dracut_args .*\-\-mount" /etc/kdump.conf
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}
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# If $1 contains dracut_args "--mount", return <filesystem type>
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get_dracut_args_fstype()
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{
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echo $1 | grep "\-\-mount" | sed "s/.*--mount .\(.*\)/\1/" | cut -d' ' -f3
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}
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# If $1 contains dracut_args "--mount", return <device>
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get_dracut_args_target()
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{
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echo $1 | grep "\-\-mount" | sed "s/.*--mount .\(.*\)/\1/" | cut -d' ' -f1
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}
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