From: Arthur Zou zzou@redhat.com
Description: Currently kdump doesn't support ipv6 nfs/ssh dump. Ipv6 is the latest version of the Internet Protocal. so it is a significant feture for kdump to enhance to support ipv6.
Solutions: Since dracut has supported ipv6 now, it is easy to change the kdump code to support ipv6. Just need pass the right _ip_opts to the second kernle. What is the main difference in userspace bettwen ipv4 and ipv6 is the ip address format. For ipv6 nfs dump: if ipv6 address type is link scope, /etc/kdump.conf should be edited like "nfs [fe80::5054:ff:fe48:ca80%eth0]:/mnt" else /etc/kdump.conf should be edited like "nfs [2001:db8:0:f101::2]:/mnt" For ipv6 ssh dump if ipv6 address type is link scope, /etc/kdump.conf should be edited like "ssh root at fe80::5054:ff:fe48:ca80%eth0" else /etc/kdump.conf should be edited like "ssh root at 2001:db8:0:f101::2"
What this patch do is: a): Add a function is_ipv6_target to tell what version of Internet Protocal (ipv4/ipv6) kdump will use to dump to remote target. b): Modify kdump_install_net to handle ipv6 configuration in /etc/kdump.conf correctly. Get the ipv6 address from /etc/kdump.conf is more complicated than ipv4 because the difference configuration format mentioned above. c): Based on the ip address type, using corresponding ip address as HOST_IP in second kernel.
It was tested for IPV6 and IPV4 address in beaker machine and passed.
Note: 1): Currntly only f19 support remount a nfs target in ipv6. detail in https: //bugzilla.redhat.com/show_bug.cgi?id=1099761. If using in f20, you can comment out "mount -o remount,rw $_mp || return 1" in kdump.sh line 105. 2): If Using static ipv6 address and configuring nfs/ssh with hostname of remote target, MUST add a ipv6 DNS in ifcfg-devname.
How to create a ipv6 enviromnet. 1): Reserving two beaker machine with family fedora19. 2): Choosing a beaker machine as a nfs/ssh server and delete it's ipv4 address by "ip address del ipv4-address dev nicname" 3): Configuring the /etc/kdump.conf like mentioned above.
Signed-off-by: Arthur Zou zzou@redhat.com Signed-off-by: Minfei Huang mhuang@redhat.com --- dracut-kdump.sh | 8 ++++-- dracut-module-setup.sh | 67 ++++++++++++++++++++++++++++++++++++-------------- kdump-lib.sh | 33 +++++++++++++++++++++++++ 3 files changed, 88 insertions(+), 20 deletions(-)
diff --git a/dracut-kdump.sh b/dracut-kdump.sh index 600e84e..9f12084 100755 --- a/dracut-kdump.sh +++ b/dracut-kdump.sh @@ -121,9 +121,13 @@ get_host_ip() then kdumpnic=$(getarg kdumpnic=) [ -z "$kdumpnic" ] && echo "kdump: failed to get kdumpnic!" && return 1 - _host=`ip addr show dev $kdumpnic|grep 'inet '` + if is_ipv6_target; then + _host=`ip addr show dev $kdumpnic|grep 'inet6'` + else + _host=`ip addr show dev $kdumpnic|grep 'inet '` + fi [ $? -ne 0 ] && echo "kdump: wrong kdumpnic: $kdumpnic" && return 1 - _host="${_host##*inet }" + _host=`echo $_host | cut -d' ' -f2` _host="${_host%%/*}" [ -z "$_host" ] && echo "kdump: wrong kdumpnic: $kdumpnic" && return 1 HOST_IP=$_host diff --git a/dracut-module-setup.sh b/dracut-module-setup.sh index 38801de..d39b127 100755 --- a/dracut-module-setup.sh +++ b/dracut-module-setup.sh @@ -70,14 +70,24 @@ kdump_setup_dns() { #$2: srcaddr #if it use static ip echo it, or echo null kdump_static_ip() { - local _netmask _gateway + local _netmask _gateway _ipaddr local _netdev="$1" _srcaddr="$2" - local _ipaddr=$(ip addr show dev $_netdev permanent | \ + + if is_ipv6_target; then + _ipaddr=$(ip addr show dev $_netdev permanent | \ + awk "/ $_srcaddr/.* /{print $2}") + if [ -n "$_ipaddr" ]; then + _gateway=$(ip -6 route list dev $_netdev | awk '/^default /{print $3}') + echo -n "[${_srcaddr}]::[${_gateway}]:64::" + fi + else + _ipaddr=$(ip addr show dev $_netdev permanent | \ awk "/ $_srcaddr/.* $_netdev$/{print $2}") - if [ -n "$_ipaddr" ]; then - _netmask=$(ipcalc -m $_ipaddr | cut -d'=' -f2) - _gateway=$(ip route list dev $_netdev | awk '/^default /{print $3}') - echo -n "${_srcaddr}::${_gateway}:${_netmask}::" + if [ -n "$_ipaddr" ]; then + _netmask=$(ipcalc -m $_ipaddr | cut -d'=' -f2) + _gateway=$(ip route list dev $_netdev | awk '/^default /{print $3}') + echo -n "${_srcaddr}::${_gateway}:${_netmask}::" + fi fi
/sbin/ip route show | grep -v default | grep "^[[:digit:]].*via.* $_netdev " |\ @@ -264,24 +274,43 @@ kdump_install_net() { local _server _netdev _srcaddr local config_val="$1"
- _server=`echo $config_val | sed 's/.*@//' | cut -d':' -f1` + _server=`get_remote_host $config_val`
- _need_dns=`echo $_server|grep "[a-zA-Z]"` - [ -n "$_need_dns" ] && _server=`getent hosts $_server|cut -d' ' -f1` + if is_ipv6_target; then + _need_dns=`echo $_server|grep "[:]"` + [ -z "$_need_dns" ] && _server=`getent hosts $_server| head -n 1 | cut -d' ' -f1` + else + _need_dns=`echo $_server|grep "[a-zA-Z]"` + [ -n "$_need_dns" ] && _server=`getent hosts $_server| head -n 1 | cut -d' ' -f1` + fi
_netdev=`/sbin/ip route get to $_server 2>&1` [ $? != 0 ] && echo "Bad kdump location: $config_val" && exit 1
- #the field in the ip output changes if we go to another subnet - if [ -n "`echo $_netdev | grep via`" ] - then - # we are going to a different subnet - _srcaddr=`echo $_netdev|awk '{print $7}'|head -n 1` - _netdev=`echo $_netdev|awk '{print $5;}'|head -n 1` + if is_ipv6_target; then + #the field in the ip output changes if we go to another subnet + if [ -n "`echo $_netdev | grep via`" ] + then + # we are going to a different subnet + _srcaddr=`echo $_netdev|awk '{print $9}'|head -n 1` + _netdev=`echo $_netdev|awk '{print $7;}'|head -n 1` + else + # we are on the same subnet + _srcaddr=`echo $_netdev|awk '{print $7}'|head -n 1` + _netdev=`echo $_netdev|awk '{print $5}'|head -n 1` + fi else - # we are on the same subnet - _srcaddr=`echo $_netdev|awk '{print $5}'|head -n 1` - _netdev=`echo $_netdev|awk '{print $3}'|head -n 1` + #the field in the ip output changes if we go to another subnet + if [ -n "`echo $_netdev | grep via`" ] + then + # we are going to a different subnet + _srcaddr=`echo $_netdev|awk '{print $7}'|head -n 1` + _netdev=`echo $_netdev|awk '{print $5;}'|head -n 1` + else + # we are on the same subnet + _srcaddr=`echo $_netdev|awk '{print $5}'|head -n 1` + _netdev=`echo $_netdev|awk '{print $3}'|head -n 1` + fi fi
kdump_setup_netdev "${_netdev}" "${_srcaddr}" @@ -583,6 +612,8 @@ install() { inst "/bin/date" "/bin/date" inst "/bin/sync" "/bin/sync" inst "/bin/cut" "/bin/cut" + inst "/bin/getent" "/bin/getent" + inst "/bin/head" "/bin/head" inst "/sbin/makedumpfile" "/sbin/makedumpfile" inst "/sbin/vmcore-dmesg" "/sbin/vmcore-dmesg" inst "/lib/kdump/kdump-lib.sh" "/lib/kdump-lib.sh" diff --git a/kdump-lib.sh b/kdump-lib.sh index a20c6e8..5053fdd 100755 --- a/kdump-lib.sh +++ b/kdump-lib.sh @@ -138,3 +138,36 @@ check_save_path_fs() fi }
+# get ip address or hostname from nfs/ssh config value +get_remote_host() +{ + local _config_val=$1 + + # in ipv6, the _config_val format is [xxxx:xxxx::xxxx%eth0]:/mnt/nfs or + # username at xxxx:xxxx::xxxx%eth0. what we need is just xxxx:xxxx::xxxx + _config_val=${_config_val#*@} + _config_val=${_config_val%:/*} + _config_val=${_config_val#[} + _config_val=${_config_val%]} + _config_val=${_config_val%%*} + echo $_config_val +} + +# check the remote server ip address tpye +is_ipv6_target() +{ + local _server _server_tmp + + if is_ssh_dump_target; then + _server=`get_option_value ssh` + elif is_nfs_dump_target; then + _server=`get_option_value nfs` + fi + + [ -z "$_server" ] && return 1 + _server=`get_remote_host $_server` + _server_tmp=$_server + _server=`getent hosts $_server | head -n 1 | cut -d' ' -f1` + _server=${_server:-$_server_tmp} + echo $_server | grep -q ":" +}
On 10/23/14 at 10:47am, Minfei Huang wrote:
From: Arthur Zou zzou@redhat.com
Description: Currently kdump doesn't support ipv6 nfs/ssh dump. Ipv6 is the latest version of the Internet Protocal. so it is a significant feture for kdump to enhance to support ipv6.
Solutions: Since dracut has supported ipv6 now, it is easy to change the kdump code to support ipv6. Just need pass the right _ip_opts to the second kernle. What is the main difference in userspace bettwen ipv4 and ipv6 is the ip address format. For ipv6 nfs dump: if ipv6 address type is link scope, /etc/kdump.conf should be edited like "nfs [fe80::5054:ff:fe48:ca80%eth0]:/mnt" else /etc/kdump.conf should be edited like "nfs [2001:db8:0:f101::2]:/mnt" For ipv6 ssh dump if ipv6 address type is link scope, /etc/kdump.conf should be edited like "ssh root at fe80::5054:ff:fe48:ca80%eth0" else /etc/kdump.conf should be edited like "ssh root at 2001:db8:0:f101::2"
What this patch do is: a): Add a function is_ipv6_target to tell what version of Internet Protocal (ipv4/ipv6) kdump will use to dump to remote target. b): Modify kdump_install_net to handle ipv6 configuration in /etc/kdump.conf correctly. Get the ipv6 address from /etc/kdump.conf is more complicated than ipv4 because the difference configuration format mentioned above. c): Based on the ip address type, using corresponding ip address as HOST_IP in second kernel.
It was tested for IPV6 and IPV4 address in beaker machine and passed.
Note: 1): Currntly only f19 support remount a nfs target in ipv6. detail in https: //bugzilla.redhat.com/show_bug.cgi?id=1099761. If using in f20, you can comment out "mount -o remount,rw $_mp || return 1" in kdump.sh line 105. 2): If Using static ipv6 address and configuring nfs/ssh with hostname of remote target, MUST add a ipv6 DNS in ifcfg-devname.
How to create a ipv6 enviromnet. 1): Reserving two beaker machine with family fedora19. 2): Choosing a beaker machine as a nfs/ssh server and delete it's ipv4 address by "ip address del ipv4-address dev nicname" 3): Configuring the /etc/kdump.conf like mentioned above.
Signed-off-by: Arthur Zou zzou@redhat.com Signed-off-by: Minfei Huang mhuang@redhat.com
dracut-kdump.sh | 8 ++++-- dracut-module-setup.sh | 67 ++++++++++++++++++++++++++++++++++++-------------- kdump-lib.sh | 33 +++++++++++++++++++++++++ 3 files changed, 88 insertions(+), 20 deletions(-)
diff --git a/dracut-kdump.sh b/dracut-kdump.sh index 600e84e..9f12084 100755 --- a/dracut-kdump.sh +++ b/dracut-kdump.sh @@ -121,9 +121,13 @@ get_host_ip() then kdumpnic=$(getarg kdumpnic=) [ -z "$kdumpnic" ] && echo "kdump: failed to get kdumpnic!" && return 1
_host=`ip addr show dev $kdumpnic|grep 'inet '`
if is_ipv6_target; then_host=`ip addr show dev $kdumpnic|grep 'inet6'`else_host=`ip addr show dev $kdumpnic|grep 'inet '`fi [ $? -ne 0 ] && echo "kdump: wrong kdumpnic: $kdumpnic" && return 1
_host="${_host##*inet }"
_host=`echo $_host | cut -d' ' -f2` _host="${_host%%/*}" [ -z "$_host" ] && echo "kdump: wrong kdumpnic: $kdumpnic" && return 1 HOST_IP=$_hostdiff --git a/dracut-module-setup.sh b/dracut-module-setup.sh index 38801de..d39b127 100755 --- a/dracut-module-setup.sh +++ b/dracut-module-setup.sh @@ -70,14 +70,24 @@ kdump_setup_dns() { #$2: srcaddr #if it use static ip echo it, or echo null kdump_static_ip() {
- local _netmask _gateway
- local _netmask _gateway _ipaddr local _netdev="$1" _srcaddr="$2"
- local _ipaddr=$(ip addr show dev $_netdev permanent | \
- if is_ipv6_target; then
_ipaddr=$(ip addr show dev $_netdev permanent | \awk "/ $_srcaddr\/.* /{print \$2}")if [ -n "$_ipaddr" ]; then_gateway=$(ip -6 route list dev $_netdev | awk '/^default /{print $3}')echo -n "[${_srcaddr}]::[${_gateway}]:64::"fi- else
_ipaddr=$(ip addr show dev $_netdev permanent | \ awk "/ $_srcaddr\/.* $_netdev\$/{print \$2}")
- if [ -n "$_ipaddr" ]; then
_netmask=$(ipcalc -m $_ipaddr | cut -d'=' -f2)_gateway=$(ip route list dev $_netdev | awk '/^default /{print $3}')echo -n "${_srcaddr}::${_gateway}:${_netmask}::"
if [ -n "$_ipaddr" ]; then_netmask=$(ipcalc -m $_ipaddr | cut -d'=' -f2)_gateway=$(ip route list dev $_netdev | awk '/^default /{print $3}')echo -n "${_srcaddr}::${_gateway}:${_netmask}::"fifi
/sbin/ip route show | grep -v default | grep "^[[:digit:]].*via.* $_netdev " |\
@@ -264,24 +274,43 @@ kdump_install_net() { local _server _netdev _srcaddr local config_val="$1"
- _server=`echo $config_val | sed 's/.*@//' | cut -d':' -f1`
- _server=`get_remote_host $config_val`
- _need_dns=`echo $_server|grep "[a-zA-Z]"`
- [ -n "$_need_dns" ] && _server=`getent hosts $_server|cut -d' ' -f1`
if is_ipv6_target; then
_need_dns=`echo $_server|grep "[:]"`[ -z "$_need_dns" ] && _server=`getent hosts $_server| head -n 1 | cut -d' ' -f1`else
_need_dns=`echo $_server|grep "[a-zA-Z]"`[ -n "$_need_dns" ] && _server=`getent hosts $_server| head -n 1 | cut -d' ' -f1`fi
_netdev=`/sbin/ip route get to $_server 2>&1` [ $? != 0 ] && echo "Bad kdump location: $config_val" && exit 1
- #the field in the ip output changes if we go to another subnet
- if [ -n "`echo $_netdev | grep via`" ]
- then
# we are going to a different subnet_srcaddr=`echo $_netdev|awk '{print $7}'|head -n 1`_netdev=`echo $_netdev|awk '{print $5;}'|head -n 1`
- if is_ipv6_target; then
#the field in the ip output changes if we go to another subnetif [ -n "`echo $_netdev | grep via`" ]then# we are going to a different subnet_srcaddr=`echo $_netdev|awk '{print $9}'|head -n 1`_netdev=`echo $_netdev|awk '{print $7;}'|head -n 1`else# we are on the same subnet_srcaddr=`echo $_netdev|awk '{print $7}'|head -n 1`_netdev=`echo $_netdev|awk '{print $5}'|head -n 1`fi
# we are on the same subnet_srcaddr=`echo $_netdev|awk '{print $5}'|head -n 1`_netdev=`echo $_netdev|awk '{print $3}'|head -n 1`
#the field in the ip output changes if we go to another subnetif [ -n "`echo $_netdev | grep via`" ]then# we are going to a different subnet_srcaddr=`echo $_netdev|awk '{print $7}'|head -n 1`_netdev=`echo $_netdev|awk '{print $5;}'|head -n 1`else# we are on the same subnet_srcaddr=`echo $_netdev|awk '{print $5}'|head -n 1`_netdev=`echo $_netdev|awk '{print $3}'|head -n 1`fifi
kdump_setup_netdev "${_netdev}" "${_srcaddr}"
@@ -583,6 +612,8 @@ install() { inst "/bin/date" "/bin/date" inst "/bin/sync" "/bin/sync" inst "/bin/cut" "/bin/cut"
- inst "/bin/getent" "/bin/getent"
- inst "/bin/head" "/bin/head" inst "/sbin/makedumpfile" "/sbin/makedumpfile" inst "/sbin/vmcore-dmesg" "/sbin/vmcore-dmesg" inst "/lib/kdump/kdump-lib.sh" "/lib/kdump-lib.sh"
diff --git a/kdump-lib.sh b/kdump-lib.sh index a20c6e8..5053fdd 100755 --- a/kdump-lib.sh +++ b/kdump-lib.sh @@ -138,3 +138,36 @@ check_save_path_fs() fi }
+# get ip address or hostname from nfs/ssh config value +get_remote_host() +{
- local _config_val=$1
- # in ipv6, the _config_val format is [xxxx:xxxx::xxxx%eth0]:/mnt/nfs or
- # username at xxxx:xxxx::xxxx%eth0. what we need is just xxxx:xxxx::xxxx
- _config_val=${_config_val#*@}
- _config_val=${_config_val%:/*}
- _config_val=${_config_val#[}
- _config_val=${_config_val%]}
- _config_val=${_config_val%%*}
- echo $_config_val
+}
+# check the remote server ip address tpye +is_ipv6_target() +{
- local _server _server_tmp
- if is_ssh_dump_target; then
_server=`get_option_value ssh`
We should apply the patch of "kdump-lib: fix get_option_value()" to correct the filter firstly.
- elif is_nfs_dump_target; then
_server=`get_option_value nfs`- fi
- [ -z "$_server" ] && return 1
- _server=`get_remote_host $_server`
- _server_tmp=$_server
- _server=`getent hosts $_server | head -n 1 | cut -d' ' -f1`
- _server=${_server:-$_server_tmp}
- echo $_server | grep -q ":"
+}
1.8.3.1
On 10/23/14 at 10:47am, Minfei Huang wrote:
From: Arthur Zou zzou@redhat.com
Description: Currently kdump doesn't support ipv6 nfs/ssh dump. Ipv6 is the latest version of the Internet Protocal. so it is a significant feture for kdump to enhance to support ipv6.
Solutions: Since dracut has supported ipv6 now, it is easy to change the kdump code to support ipv6. Just need pass the right _ip_opts to the second kernle. What is the main difference in userspace bettwen ipv4 and ipv6 is the ip address format. For ipv6 nfs dump: if ipv6 address type is link scope, /etc/kdump.conf should be edited like "nfs [fe80::5054:ff:fe48:ca80%eth0]:/mnt" else /etc/kdump.conf should be edited like "nfs [2001:db8:0:f101::2]:/mnt" For ipv6 ssh dump if ipv6 address type is link scope, /etc/kdump.conf should be edited like "ssh root at fe80::5054:ff:fe48:ca80%eth0" else /etc/kdump.conf should be edited like "ssh root at 2001:db8:0:f101::2"
What this patch do is: a): Add a function is_ipv6_target to tell what version of Internet Protocal (ipv4/ipv6) kdump will use to dump to remote target. b): Modify kdump_install_net to handle ipv6 configuration in /etc/kdump.conf correctly. Get the ipv6 address from /etc/kdump.conf is more complicated than ipv4 because the difference configuration format mentioned above. c): Based on the ip address type, using corresponding ip address as HOST_IP in second kernel.
It was tested for IPV6 and IPV4 address in beaker machine and passed.
Note: 1): Currntly only f19 support remount a nfs target in ipv6. detail in https: //bugzilla.redhat.com/show_bug.cgi?id=1099761. If using in f20, you can comment out "mount -o remount,rw $_mp || return 1" in kdump.sh line 105. 2): If Using static ipv6 address and configuring nfs/ssh with hostname of remote target, MUST add a ipv6 DNS in ifcfg-devname.
How to create a ipv6 enviromnet. 1): Reserving two beaker machine with family fedora19. 2): Choosing a beaker machine as a nfs/ssh server and delete it's ipv4 address by "ip address del ipv4-address dev nicname" 3): Configuring the /etc/kdump.conf like mentioned above.
Both the patch and config format looks good to me.
Acked-by: WANG Chao chaowang@redhat.com
Signed-off-by: Arthur Zou zzou@redhat.com Signed-off-by: Minfei Huang mhuang@redhat.com
dracut-kdump.sh | 8 ++++-- dracut-module-setup.sh | 67 ++++++++++++++++++++++++++++++++++++-------------- kdump-lib.sh | 33 +++++++++++++++++++++++++ 3 files changed, 88 insertions(+), 20 deletions(-)
diff --git a/dracut-kdump.sh b/dracut-kdump.sh index 600e84e..9f12084 100755 --- a/dracut-kdump.sh +++ b/dracut-kdump.sh @@ -121,9 +121,13 @@ get_host_ip() then kdumpnic=$(getarg kdumpnic=) [ -z "$kdumpnic" ] && echo "kdump: failed to get kdumpnic!" && return 1
_host=`ip addr show dev $kdumpnic|grep 'inet '`
if is_ipv6_target; then_host=`ip addr show dev $kdumpnic|grep 'inet6'`else_host=`ip addr show dev $kdumpnic|grep 'inet '`fi [ $? -ne 0 ] && echo "kdump: wrong kdumpnic: $kdumpnic" && return 1
_host="${_host##*inet }"
_host=`echo $_host | cut -d' ' -f2` _host="${_host%%/*}" [ -z "$_host" ] && echo "kdump: wrong kdumpnic: $kdumpnic" && return 1 HOST_IP=$_hostdiff --git a/dracut-module-setup.sh b/dracut-module-setup.sh index 38801de..d39b127 100755 --- a/dracut-module-setup.sh +++ b/dracut-module-setup.sh @@ -70,14 +70,24 @@ kdump_setup_dns() { #$2: srcaddr #if it use static ip echo it, or echo null kdump_static_ip() {
- local _netmask _gateway
- local _netmask _gateway _ipaddr local _netdev="$1" _srcaddr="$2"
- local _ipaddr=$(ip addr show dev $_netdev permanent | \
- if is_ipv6_target; then
_ipaddr=$(ip addr show dev $_netdev permanent | \awk "/ $_srcaddr\/.* /{print \$2}")if [ -n "$_ipaddr" ]; then_gateway=$(ip -6 route list dev $_netdev | awk '/^default /{print $3}')echo -n "[${_srcaddr}]::[${_gateway}]:64::"fi- else
_ipaddr=$(ip addr show dev $_netdev permanent | \ awk "/ $_srcaddr\/.* $_netdev\$/{print \$2}")
- if [ -n "$_ipaddr" ]; then
_netmask=$(ipcalc -m $_ipaddr | cut -d'=' -f2)_gateway=$(ip route list dev $_netdev | awk '/^default /{print $3}')echo -n "${_srcaddr}::${_gateway}:${_netmask}::"
if [ -n "$_ipaddr" ]; then_netmask=$(ipcalc -m $_ipaddr | cut -d'=' -f2)_gateway=$(ip route list dev $_netdev | awk '/^default /{print $3}')echo -n "${_srcaddr}::${_gateway}:${_netmask}::"fifi
/sbin/ip route show | grep -v default | grep "^[[:digit:]].*via.* $_netdev " |\
@@ -264,24 +274,43 @@ kdump_install_net() { local _server _netdev _srcaddr local config_val="$1"
- _server=`echo $config_val | sed 's/.*@//' | cut -d':' -f1`
- _server=`get_remote_host $config_val`
- _need_dns=`echo $_server|grep "[a-zA-Z]"`
- [ -n "$_need_dns" ] && _server=`getent hosts $_server|cut -d' ' -f1`
if is_ipv6_target; then
_need_dns=`echo $_server|grep "[:]"`[ -z "$_need_dns" ] && _server=`getent hosts $_server| head -n 1 | cut -d' ' -f1`else
_need_dns=`echo $_server|grep "[a-zA-Z]"`[ -n "$_need_dns" ] && _server=`getent hosts $_server| head -n 1 | cut -d' ' -f1`fi
_netdev=`/sbin/ip route get to $_server 2>&1` [ $? != 0 ] && echo "Bad kdump location: $config_val" && exit 1
- #the field in the ip output changes if we go to another subnet
- if [ -n "`echo $_netdev | grep via`" ]
- then
# we are going to a different subnet_srcaddr=`echo $_netdev|awk '{print $7}'|head -n 1`_netdev=`echo $_netdev|awk '{print $5;}'|head -n 1`
- if is_ipv6_target; then
#the field in the ip output changes if we go to another subnetif [ -n "`echo $_netdev | grep via`" ]then# we are going to a different subnet_srcaddr=`echo $_netdev|awk '{print $9}'|head -n 1`_netdev=`echo $_netdev|awk '{print $7;}'|head -n 1`else# we are on the same subnet_srcaddr=`echo $_netdev|awk '{print $7}'|head -n 1`_netdev=`echo $_netdev|awk '{print $5}'|head -n 1`fi
# we are on the same subnet_srcaddr=`echo $_netdev|awk '{print $5}'|head -n 1`_netdev=`echo $_netdev|awk '{print $3}'|head -n 1`
#the field in the ip output changes if we go to another subnetif [ -n "`echo $_netdev | grep via`" ]then# we are going to a different subnet_srcaddr=`echo $_netdev|awk '{print $7}'|head -n 1`_netdev=`echo $_netdev|awk '{print $5;}'|head -n 1`else# we are on the same subnet_srcaddr=`echo $_netdev|awk '{print $5}'|head -n 1`_netdev=`echo $_netdev|awk '{print $3}'|head -n 1`fifi
kdump_setup_netdev "${_netdev}" "${_srcaddr}"
@@ -583,6 +612,8 @@ install() { inst "/bin/date" "/bin/date" inst "/bin/sync" "/bin/sync" inst "/bin/cut" "/bin/cut"
- inst "/bin/getent" "/bin/getent"
- inst "/bin/head" "/bin/head" inst "/sbin/makedumpfile" "/sbin/makedumpfile" inst "/sbin/vmcore-dmesg" "/sbin/vmcore-dmesg" inst "/lib/kdump/kdump-lib.sh" "/lib/kdump-lib.sh"
diff --git a/kdump-lib.sh b/kdump-lib.sh index a20c6e8..5053fdd 100755 --- a/kdump-lib.sh +++ b/kdump-lib.sh @@ -138,3 +138,36 @@ check_save_path_fs() fi }
+# get ip address or hostname from nfs/ssh config value +get_remote_host() +{
- local _config_val=$1
- # in ipv6, the _config_val format is [xxxx:xxxx::xxxx%eth0]:/mnt/nfs or
- # username at xxxx:xxxx::xxxx%eth0. what we need is just xxxx:xxxx::xxxx
- _config_val=${_config_val#*@}
- _config_val=${_config_val%:/*}
- _config_val=${_config_val#[}
- _config_val=${_config_val%]}
- _config_val=${_config_val%%*}
- echo $_config_val
+}
+# check the remote server ip address tpye +is_ipv6_target() +{
- local _server _server_tmp
- if is_ssh_dump_target; then
_server=`get_option_value ssh`- elif is_nfs_dump_target; then
_server=`get_option_value nfs`- fi
- [ -z "$_server" ] && return 1
- _server=`get_remote_host $_server`
- _server_tmp=$_server
- _server=`getent hosts $_server | head -n 1 | cut -d' ' -f1`
- _server=${_server:-$_server_tmp}
- echo $_server | grep -q ":"
+}
1.8.3.1
kexec mailing list kexec@lists.fedoraproject.org https://lists.fedoraproject.org/mailman/listinfo/kexec
On 10/23/14 at 10:47am, Minfei Huang wrote:
From: Arthur Zou zzou@redhat.com
+# check the remote server ip address tpye +is_ipv6_target() +{
- local _server _server_tmp
- if is_ssh_dump_target; then
_server=`get_option_value ssh`- elif is_nfs_dump_target; then
_server=`get_option_value nfs`- fi
- [ -z "$_server" ] && return 1
- _server=`get_remote_host $_server`
- _server_tmp=$_server
- _server=`getent hosts $_server | head -n 1 | cut -d' ' -f1`
We have discussed above line, "getent hosts" will return the ip address from hostname uncertainly. So we had better use "getent ahosts", it returns ipv4 address firstly if ipv4 address exist, then returns ipv6 address if ipv4 address doesn't exist.
- _server=${_server:-$_server_tmp}
- echo $_server | grep -q ":"
+}
1.8.3.1
kexec mailing list kexec@lists.fedoraproject.org https://lists.fedoraproject.org/mailman/listinfo/kexec
On 10/23/14 at 10:47am, Minfei Huang wrote: --- a/dracut-module-setup.sh
+++ b/dracut-module-setup.sh @@ -70,14 +70,24 @@ kdump_setup_dns() { #$2: srcaddr #if it use static ip echo it, or echo null kdump_static_ip() {
- local _netmask _gateway
- local _netmask _gateway _ipaddr local _netdev="$1" _srcaddr="$2"
- local _ipaddr=$(ip addr show dev $_netdev permanent | \
- if is_ipv6_target; then
_ipaddr=$(ip addr show dev $_netdev permanent | \awk "/ $_srcaddr\/.* /{print \$2}")if [ -n "$_ipaddr" ]; then_gateway=$(ip -6 route list dev $_netdev | awk '/^default /{print $3}')echo -n "[${_srcaddr}]::[${_gateway}]:64::"fi- else
_ipaddr=$(ip addr show dev $_netdev permanent | \ awk "/ $_srcaddr\/.* $_netdev\$/{print \$2}")
- if [ -n "$_ipaddr" ]; then
_netmask=$(ipcalc -m $_ipaddr | cut -d'=' -f2)_gateway=$(ip route list dev $_netdev | awk '/^default /{print $3}')echo -n "${_srcaddr}::${_gateway}:${_netmask}::"
if [ -n "$_ipaddr" ]; then_netmask=$(ipcalc -m $_ipaddr | cut -d'=' -f2)_gateway=$(ip route list dev $_netdev | awk '/^default /{print $3}')echo -n "${_srcaddr}::${_gateway}:${_netmask}::"fifi
/sbin/ip route show | grep -v default | grep "^[[:digit:]].*via.* $_netdev " |\
@@ -264,24 +274,43 @@ kdump_install_net() { local _server _netdev _srcaddr local config_val="$1"
- _server=`echo $config_val | sed 's/.*@//' | cut -d':' -f1`
- _server=`get_remote_host $config_val`
- _need_dns=`echo $_server|grep "[a-zA-Z]"`
Below I have the same concerns about the "getent hosts". "getent hosts" uses gethostbyaddr() to get addr while "getent ahosts" uses getaddrinfo(). Checking manpage of gethostbyaddr(), I got below information:
~~~~~~~~~~~~ The gethostbyname*() and gethostbyaddr*() functions are obsolete. Applications should use getaddrinfo(3) and getnameinfo(3) instead. ~~~~~~~~~~~~~~
I think we should use "getent ahosts", it's the latest.
- [ -n "$_need_dns" ] && _server=`getent hosts $_server|cut -d' ' -f1`
if is_ipv6_target; then
_need_dns=`echo $_server|grep "[:]"`[ -z "$_need_dns" ] && _server=`getent hosts $_server| head -n 1 | cut -d' ' -f1`else
_need_dns=`echo $_server|grep "[a-zA-Z]"`[ -n "$_need_dns" ] && _server=`getent hosts $_server| head -n 1 | cut -d' ' -f1`fi
_netdev=`/sbin/ip route get to $_server 2>&1` [ $? != 0 ] && echo "Bad kdump location: $config_val" && exit 1
- #the field in the ip output changes if we go to another subnet
- if [ -n "`echo $_netdev | grep via`" ]
- then
# we are going to a different subnet_srcaddr=`echo $_netdev|awk '{print $7}'|head -n 1`_netdev=`echo $_netdev|awk '{print $5;}'|head -n 1`
- if is_ipv6_target; then
#the field in the ip output changes if we go to another subnetif [ -n "`echo $_netdev | grep via`" ]then# we are going to a different subnet_srcaddr=`echo $_netdev|awk '{print $9}'|head -n 1`_netdev=`echo $_netdev|awk '{print $7;}'|head -n 1`else# we are on the same subnet_srcaddr=`echo $_netdev|awk '{print $7}'|head -n 1`_netdev=`echo $_netdev|awk '{print $5}'|head -n 1`fi
# we are on the same subnet_srcaddr=`echo $_netdev|awk '{print $5}'|head -n 1`_netdev=`echo $_netdev|awk '{print $3}'|head -n 1`
#the field in the ip output changes if we go to another subnetif [ -n "`echo $_netdev | grep via`" ]then# we are going to a different subnet_srcaddr=`echo $_netdev|awk '{print $7}'|head -n 1`_netdev=`echo $_netdev|awk '{print $5;}'|head -n 1`else# we are on the same subnet_srcaddr=`echo $_netdev|awk '{print $5}'|head -n 1`_netdev=`echo $_netdev|awk '{print $3}'|head -n 1`fifi
kdump_setup_netdev "${_netdev}" "${_srcaddr}"
@@ -583,6 +612,8 @@ install() { inst "/bin/date" "/bin/date" inst "/bin/sync" "/bin/sync" inst "/bin/cut" "/bin/cut"
- inst "/bin/getent" "/bin/getent"
In dracut-module-setup.sh there has been a getent calling, do we have to include it again?
- inst "/bin/head" "/bin/head" inst "/sbin/makedumpfile" "/sbin/makedumpfile" inst "/sbin/vmcore-dmesg" "/sbin/vmcore-dmesg" inst "/lib/kdump/kdump-lib.sh" "/lib/kdump-lib.sh"
diff --git a/kdump-lib.sh b/kdump-lib.sh index a20c6e8..5053fdd 100755 --- a/kdump-lib.sh +++ b/kdump-lib.sh @@ -138,3 +138,36 @@ check_save_path_fs() fi }
+# get ip address or hostname from nfs/ssh config value +get_remote_host() +{
- local _config_val=$1
- # in ipv6, the _config_val format is [xxxx:xxxx::xxxx%eth0]:/mnt/nfs or
- # username at xxxx:xxxx::xxxx%eth0. what we need is just xxxx:xxxx::xxxx
- _config_val=${_config_val#*@}
- _config_val=${_config_val%:/*}
- _config_val=${_config_val#[}
- _config_val=${_config_val%]}
- _config_val=${_config_val%%*}
- echo $_config_val
+}
+# check the remote server ip address tpye +is_ipv6_target() +{
- local _server _server_tmp
- if is_ssh_dump_target; then
_server=`get_option_value ssh`- elif is_nfs_dump_target; then
_server=`get_option_value nfs`- fi
- [ -z "$_server" ] && return 1
- _server=`get_remote_host $_server`
- _server_tmp=$_server
- _server=`getent hosts $_server | head -n 1 | cut -d' ' -f1`
- _server=${_server:-$_server_tmp}
- echo $_server | grep -q ":"
+}
1.8.3.1
kexec mailing list kexec@lists.fedoraproject.org https://lists.fedoraproject.org/mailman/listinfo/kexec
On 10/28/14 at 02:15pm, Baoquan He wrote:
On 10/23/14 at 10:47am, Minfei Huang wrote: --- a/dracut-module-setup.sh
+++ b/dracut-module-setup.sh @@ -70,14 +70,24 @@ kdump_setup_dns() { local _server _netdev _srcaddr local config_val="$1"
... skip ...
- _server=`echo $config_val | sed 's/.*@//' | cut -d':' -f1`
- _server=`get_remote_host $config_val`
- _need_dns=`echo $_server|grep "[a-zA-Z]"`
Below I have the same concerns about the "getent hosts". "getent hosts" uses gethostbyaddr() to get addr while "getent ahosts" uses getaddrinfo(). Checking manpage of gethostbyaddr(), I got below information:
The gethostbyname*() and gethostbyaddr*() functions are obsolete. Applications should use getaddrinfo(3) and getnameinfo(3) instead.I think we should use "getent ahosts", it's the latest.
The command "getent ahosts google.com" will return the result by the order of ipv4, ipv6.
If the target has ipv6 address assigned, using the command "getent hosts google.com" will show you the ipv6 address, otherwise show you the ipv4 address.
So the I prefer to use the command "getent hosts" to get the default type of ip address which is assigned by the target.
- [ -n "$_need_dns" ] && _server=`getent hosts $_server|cut -d' ' -f1`
- if is_ipv6_target; then
_need_dns=`echo $_server|grep "[:]"`@@ -583,6 +612,8 @@ install() { inst "/bin/date" "/bin/date" inst "/bin/sync" "/bin/sync" inst "/bin/cut" "/bin/cut"
- inst "/bin/getent" "/bin/getent"
In dracut-module-setup.sh there has been a getent calling, do we have to include it again?
- inst "/bin/head" "/bin/head" inst "/sbin/makedumpfile" "/sbin/makedumpfile"
... skip ...
kexec@lists.fedoraproject.org https://lists.fedoraproject.org/mailman/listinfo/kexec
On 10/28/14 at 03:29pm, Minfei Huang wrote:
On 10/28/14 at 02:15pm, Baoquan He wrote:
On 10/23/14 at 10:47am, Minfei Huang wrote: --- a/dracut-module-setup.sh
+++ b/dracut-module-setup.sh @@ -70,14 +70,24 @@ kdump_setup_dns() { local _server _netdev _srcaddr local config_val="$1"
... skip ...
- _server=`echo $config_val | sed 's/.*@//' | cut -d':' -f1`
- _server=`get_remote_host $config_val`
- _need_dns=`echo $_server|grep "[a-zA-Z]"`
Below I have the same concerns about the "getent hosts". "getent hosts" uses gethostbyaddr() to get addr while "getent ahosts" uses getaddrinfo(). Checking manpage of gethostbyaddr(), I got below information:
The gethostbyname*() and gethostbyaddr*() functions are obsolete. Applications should use getaddrinfo(3) and getnameinfo(3) instead.I think we should use "getent ahosts", it's the latest.
The command "getent ahosts google.com" will return the result by the order of ipv4, ipv6.
If the target has ipv6 address assigned, using the command "getent hosts google.com" will show you the ipv6 address, otherwise show you the ipv4 address.
Currently ipv6 is tried and started but still not spread out very widely and still a long time to replace ipv4. I don't find a reason ipv6 should take higher priority then ipv4 in current kdump.
So the I prefer to use the command "getent hosts" to get the default type of ip address which is assigned by the target.
Now hosts takes obsolete low level API which will be discarded and not maintained any more gradually. However ahosts is under development. From man page this is clear. Though there isn't other better reason we should use ahosts, we also can't find even a good reason to tell we should not take ahosts and continue using hosts.
So I insist we should use ahosts to replace hosts.
Thanks Baoquan
- [ -n "$_need_dns" ] && _server=`getent hosts $_server|cut -d' ' -f1`
- if is_ipv6_target; then
_need_dns=`echo $_server|grep "[:]"`@@ -583,6 +612,8 @@ install() { inst "/bin/date" "/bin/date" inst "/bin/sync" "/bin/sync" inst "/bin/cut" "/bin/cut"
- inst "/bin/getent" "/bin/getent"
In dracut-module-setup.sh there has been a getent calling, do we have to include it again?
- inst "/bin/head" "/bin/head" inst "/sbin/makedumpfile" "/sbin/makedumpfile"
... skip ...
kexec@lists.fedoraproject.org https://lists.fedoraproject.org/mailman/listinfo/kexec
kexec mailing list kexec@lists.fedoraproject.org https://lists.fedoraproject.org/mailman/listinfo/kexec
On 10/28/14 at 02:15pm, Baoquan He wrote:
On 10/23/14 at 10:47am, Minfei Huang wrote:
kdump_setup_netdev "${_netdev}" "${_srcaddr}"@@ -583,6 +612,8 @@ install() { inst "/bin/date" "/bin/date" inst "/bin/sync" "/bin/sync" inst "/bin/cut" "/bin/cut"
- inst "/bin/getent" "/bin/getent"
In dracut-module-setup.sh there has been a getent calling, do we have to include it again?
Sorry, please ignore this. Since dracut-module-setup.sh is called in 1st kernel.
- inst "/bin/head" "/bin/head" inst "/sbin/makedumpfile" "/sbin/makedumpfile" inst "/sbin/vmcore-dmesg" "/sbin/vmcore-dmesg" inst "/lib/kdump/kdump-lib.sh" "/lib/kdump-lib.sh"
diff --git a/kdump-lib.sh b/kdump-lib.sh index a20c6e8..5053fdd 100755 --- a/kdump-lib.sh +++ b/kdump-lib.sh @@ -138,3 +138,36 @@ check_save_path_fs() fi }
+# get ip address or hostname from nfs/ssh config value +get_remote_host() +{
- local _config_val=$1
- # in ipv6, the _config_val format is [xxxx:xxxx::xxxx%eth0]:/mnt/nfs or
- # username at xxxx:xxxx::xxxx%eth0. what we need is just xxxx:xxxx::xxxx
- _config_val=${_config_val#*@}
- _config_val=${_config_val%:/*}
- _config_val=${_config_val#[}
- _config_val=${_config_val%]}
- _config_val=${_config_val%%*}
- echo $_config_val
+}
+# check the remote server ip address tpye +is_ipv6_target() +{
- local _server _server_tmp
- if is_ssh_dump_target; then
_server=`get_option_value ssh`- elif is_nfs_dump_target; then
_server=`get_option_value nfs`- fi
- [ -z "$_server" ] && return 1
- _server=`get_remote_host $_server`
- _server_tmp=$_server
- _server=`getent hosts $_server | head -n 1 | cut -d' ' -f1`
- _server=${_server:-$_server_tmp}
- echo $_server | grep -q ":"
+}
1.8.3.1
kexec mailing list kexec@lists.fedoraproject.org https://lists.fedoraproject.org/mailman/listinfo/kexec
-
Baoquan He -
Minfei Huang -
WANG Chao