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This patch series handles exit from a network name space.
REVISION
This is version 2
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
>From Julian -
"For __ip_vs_service_cleanup: it still has to use mutex.
Or we can avoid it by introducing ip_vs_unlink_service_nolock:
ip_vs_flush will look like your __ip_vs_service_cleanup and
will call ip_vs_unlink_service_nolock. ip_vs_unlink_service_nolock
will be called by ip_vs_flush and by ip_vs_unlink_service."
I will give above another try later on see if I can get it to work.
Right now ip_vs_service_net_cleanup() seems to work.
An netns exit could look like this
IPVS: Enter: __ip_vs_dev_cleanup, net/netfilter/ipvs/ip_vs_core.c
IPVS: stopping master sync thread 1286 ...
IPVS: stopping backup sync thread 1294 ...
IPVS: Leave: __ip_vs_dev_cleanup, net/netfilter/ipvs/ip_vs_core.c
IPVS: Enter: ip_vs_dst_event, net/netfilter/ipvs/ip_vs_ctl.c line
IPVS: Leave: ip_vs_dst_event, net/netfilter/ipvs/ip_vs_ctl.c line
...
IPVS: Enter: ip_vs_dst_event, net/netfilter/ipvs/ip_vs_ctl.c line
IPVS: Leave: ip_vs_dst_event, net/netfilter/ipvs/ip_vs_ctl.c line
IPVS: Enter: ip_vs_service_net_cleanup, net/netfilter/ipvs/ip_vs_ctl.c
IPVS: __ip_vs_del_service: enter
IPVS: Moving dest 192.168.1.6:0 into trash, dest->refcnt=43450
...
IPVS: Moving dest 192.168.1.3:0 into trash, dest->refcnt=43449
IPVS: __ip_vs_del_service: enter
IPVS: Removing destination 0/[2003:0000:0000:0000:0000:0002:0000:0006]:80
...
IPVS: Removing destination 0/[2003:0000:0000:0000:0000:0002:0000:0003]:80
IPVS: Removing service 0/[2003:0000:0000:0000:0000:0002:0004:0100]:80 usecnt=0
IPVS: Leave: ip_vs_service_net_cleanup, net/netfilter/ipvs/ip_vs_ctl.c
IPVS: Enter: ip_vs_control_net_cleanup, net/netfilter/ipvs/ip_vs_ctl.c
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
IPVS: ipvs netns 8 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 | 118 +++++++++++++++++++--------
net/netfilter/ipvs/ip_vs_ctl.c | 168 +++++++++++++++++++++++++++++++-------
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, 281 insertions(+), 167 deletions(-)
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