This patch series handles exit from a network name space.
REVISION
This is version 4
OVERVIEW
Basically there was three faults in the netns implementation.
- Kernel threads hold devices and preventing an exit.
- dst cache holds references to devices.
- Services was not always released.
Patch 1 & 3 contains the functionality
4 renames funcctions
5 removes empty functions
6 Debuging.
IMPLEMENTATION
- Avoid to increment the usage counter for kernel threads.
this is done in the first patch.
- Patch 3 tries to restore the cleanup order.
Add NETDEV_UNREGISTER notification for dst_reset
(eleased version could not handle unregistration of netdevices.)
Comments from Eric, Julian and Simon implmented.
Revision 3
Residies in patch 3
Throttle renamed to enable.
Comments from Julian implemented
Check enable in ip_vs_in, ip_vs_out and ip_vs_forward_icmp*
Remove in ip_vs_in_icmp*.
ip_vs_svc_reset() moved into ip_vs_dst_event().
ip_vs_service_cleanup() uses ip_vs_flush and mutex lock.
ip_vs_unlink_service_nolock() added.
Revision 4
ip_vs_unlink_service_nolock() removed.
ip_vs_flush() reverted.
Return code check changed in stop thread.
An netns exit could look like this:
IPVS: Enter: __ip_vs_dev_cleanup, net/netfilter/ipvs/ip_vs_core.c line 1966
IPVS: stopping master sync thread 1845 ...
IPVS: stopping backup sync thread 1850 ...
IPVS: Leave: __ip_vs_dev_cleanup, net/netfilter/ipvs/ip_vs_core.c line 1969
IPVS: ip_vs_dst_event() dev=ip6tnl0
IPVS: Enter: ip_vs_dst_event, net/netfilter/ipvs/ip_vs_ctl.c line 1540
IPVS: Leave: ip_vs_dst_event, net/netfilter/ipvs/ip_vs_ctl.c line 1567
IPVS: ip_vs_dst_event() dev=sit0
IPVS: Enter: ip_vs_dst_event, net/netfilter/ipvs/ip_vs_ctl.c line 1540
IPVS: Leave: ip_vs_dst_event, net/netfilter/ipvs/ip_vs_ctl.c line 1567
IPVS: ip_vs_dst_event() dev=tunl0
IPVS: Enter: ip_vs_dst_event, net/netfilter/ipvs/ip_vs_ctl.c line 1540
IPVS: Leave: ip_vs_dst_event, net/netfilter/ipvs/ip_vs_ctl.c line 1567
IPVS: ip_vs_dst_event() dev=eth1
IPVS: Enter: ip_vs_dst_event, net/netfilter/ipvs/ip_vs_ctl.c line 1540
IPVS: Leave: ip_vs_dst_event, net/netfilter/ipvs/ip_vs_ctl.c line 1567
IPVS: ip_vs_dst_event() dev=eth0
IPVS: Enter: ip_vs_dst_event, net/netfilter/ipvs/ip_vs_ctl.c line 1540
IPVS: Reset dev:eth0 dest 192.168.1.6:0 ,dest->refcnt=2380471
IPVS: Reset dev:eth0 dest 192.168.1.4:0 ,dest->refcnt=2380471
IPVS: Reset dev:eth0 dest 192.168.1.3:0 ,dest->refcnt=2380471
IPVS: Leave: ip_vs_dst_event, net/netfilter/ipvs/ip_vs_ctl.c line 1567
IPVS: ip_vs_dst_event() dev=lo
IPVS: Enter: ip_vs_dst_event, net/netfilter/ipvs/ip_vs_ctl.c line 1540
IPVS: Leave: ip_vs_dst_event, net/netfilter/ipvs/ip_vs_ctl.c line 1567
IPVS: Enter: ip_vs_service_net_cleanup, net/netfilter/ipvs/ip_vs_ctl.c line 1498
IPVS: __ip_vs_del_service: enter
IPVS: Removing destination 0/[2003:0000:0000:0000:0000:0002:0000:0006]:80
IPVS: Removing destination 0/[2003:0000:0000:0000:0000:0002:0000:0004]:80
IPVS: Removing destination 0/[2003:0000:0000:0000:0000:0002:0000:0003]:80
IPVS: Removing service 0/[2003:0000:0000:0000:0000:0002:0001:0100]:80 usecnt=0
IPVS: __ip_vs_del_service: enter
IPVS: Moving dest 192.168.1.6:0 into trash, dest->refcnt=2380470
IPVS: Moving dest 192.168.1.4:0 into trash, dest->refcnt=2380470
IPVS: Moving dest 192.168.1.3:0 into trash, dest->refcnt=2380470
IPVS: Leave: ip_vs_service_net_cleanup, net/netfilter/ipvs/ip_vs_ctl.c line 1503
IPVS: Enter: ip_vs_control_net_cleanup, net/netfilter/ipvs/ip_vs_ctl.c line 3734
IPVS: Removing service 80/0.0.0.0:0 usecnt=0
IPVS: Leave: ip_vs_control_net_cleanup, net/netfilter/ipvs/ip_vs_ctl.c line 3742
IPVS: ipvs netns 13 released
PATCH SET
This patch set is based upon net-next-2.6 (2.6.39-rc2)
SUMMARY
include/net/ip_vs.h | 23 ++++--
net/netfilter/ipvs/ip_vs_app.c | 23 +-----
net/netfilter/ipvs/ip_vs_conn.c | 14 +---
net/netfilter/ipvs/ip_vs_core.c | 132 +++++++++++++++++++++++---------
net/netfilter/ipvs/ip_vs_ctl.c | 158 ++++++++++++++++++++++++++++++--------
net/netfilter/ipvs/ip_vs_est.c | 21 +-----
net/netfilter/ipvs/ip_vs_proto.c | 11 +--
net/netfilter/ipvs/ip_vs_sync.c | 70 +++++++++---------
8 files changed, 285 insertions(+), 167 deletions(-)
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