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dec827d174
linux/include/net
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Pavel Emelyanov dec827d174 [NETNS]: The generic per-net pointers. 
Add the elastic array of void * pointer to the struct net.
The access rules are simple:

 1. register the ops with register_pernet_gen_device to get
    the id of your private pointer
 2. call net_assign_generic() to put the private data on the
    struct net (most preferably this should be done in the
    ->init callback of the ops registered)
 3. do not store any private reference on the net_generic array;
 4. do not change this pointer while the net is alive;
 5. use the net_generic() to get the pointer.

When adding a new pointer, I copy the old array, replace it
with a new one and schedule the old for kfree after an RCU
grace period.

Since the net_generic explores the net->gen array inside rcu
read section and once set the net->gen->ptr[x] pointer never 
changes, this grants us a safe access to generic pointers.

Quoting Paul: "... RCU is protecting -only- the net_generic 
structure that net_generic() is traversing, and the [pointer]
returned by net_generic() is protected by a reference counter 
in the upper-level struct net."

Signed-off-by: Pavel Emelyanov <xemul@openvz.org>
Acked-by: Paul E. McKenney <paulmck@linux.vnet.ibm.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
2008-04-15 00:36:08 -07:00
..
9p
bluetooth bluetooth: Make hci_sock_cleanup() return void 2008-03-05 18:47:03 -08:00
irda [IRDA]: Remove irlan_eth_send_gratuitous_arp() 2008-04-15 00:29:24 -07:00
iucv
netfilter [NETFILTER]: nf_conntrack: replace NF_CT_DUMP_TUPLE macro indrection by function call 2008-04-14 11:15:54 +02:00
netns [NETNS]: The generic per-net pointers. 2008-04-15 00:36:08 -07:00
sctp Merge branch 'master' of master.kernel.org:/pub/scm/linux/kernel/git/davem/net-2.6 2008-04-14 02:30:23 -07:00
tc_act
tipc [TIPC]: Overhaul of socket locking logic 2008-04-15 00:22:02 -07:00
act_api.h
addrconf.h [IPV6]: Define constants for link-local multicast addresses. 2008-04-12 13:43:19 +09:00
af_rxrpc.h
af_unix.h
ah.h
arp.h
atmclip.h
ax25.h
ax88796.h
cfg80211.h nl80211/cfg80211: support for mesh, sta dumping 2008-03-06 15:30:41 -05:00
checksum.h
cipso_ipv4.h
compat.h
datalink.h
dn_dev.h
dn_fib.h
dn_neigh.h
dn_nsp.h
dn_route.h
dn.h
dsfield.h
dst.h [NET]: uninline dst_release 2008-03-27 17:53:31 -07:00
esp.h
fib_rules.h
flow.h
gen_stats.h
genetlink.h
icmp.h [NETNS][ICMP]: Move ICMP sysctls on struct net. 2008-03-26 01:55:37 -07:00
ieee80211_crypt.h
ieee80211_radiotap.h
ieee80211.h include/net/ieee80211.h - remove duplicate include 2008-03-13 19:32:31 -04:00
if_inet6.h
inet6_connection_sock.h
inet6_hashtables.h
inet_common.h [NETNS]: Inet control socket should not hold a namespace. 2008-04-03 14:28:30 -07:00
inet_connection_sock.h [INET]: Rename inet_csk_ctl_sock_create to inet_ctl_sock_create. 2008-04-03 14:22:32 -07:00
inet_ecn.h [IPV6]: Use appropriate sock tclass setting for routing lookup. 2008-04-13 23:40:51 -07:00
inet_frag.h [NET]: Rename inet_frag.h identifiers COMPLETE, FIRST_IN, LAST_IN to INET_FRAG_* 2008-03-28 16:35:27 -07:00
inet_hashtables.h [NET] NETNS: Omit sock->sk_net without CONFIG_NET_NS. 2008-03-26 04:39:55 +09:00
inet_sock.h [IPV4,IPV6]: Share cork.rt between IPv4 and IPv6. 2008-03-25 10:23:59 +09:00
inet_timewait_sock.h [NETNS]: Compilation warnings under CONFIG_NET_NS. 2008-03-26 00:48:17 -07:00
inetpeer.h
ip6_checksum.h
ip6_fib.h [NETNS][IPV6] rt6_info - move rt6_info structure inside the namespace 2008-03-04 13:48:30 -08:00
ip6_route.h [IPV6]: Make address arguments const. 2008-04-12 13:43:18 +09:00
ip6_tunnel.h [IP_TUNNEL]: Don't limit the number of tunnels with generic name explicitly. 2008-02-23 20:19:20 -08:00
ip_fib.h
ip_vs.h
ip.h [NETNS]: Add namespace parameter to ip_cmsg_send. 2008-03-24 15:30:27 -07:00
ipcomp.h
ipconfig.h
ipip.h [IPV6] SIT: Add SIOCGETPRL ioctl to get/dump PRL. 2008-04-03 10:06:00 +09:00
ipv6.h [IPV6]: Make address arguments const. 2008-04-12 13:43:18 +09:00
ipx.h
iw_handler.h
lapb.h
llc_c_ac.h
llc_c_ev.h
llc_c_st.h
llc_conn.h
llc_if.h [LLC]: Kill static inline llc_addrany 2008-02-29 11:46:17 -08:00
llc_pdu.h [LLC]: skb allocation size for responses 2008-03-31 21:02:47 -07:00
llc_s_ac.h
llc_s_ev.h
llc_s_st.h
llc_sap.h [LLC]: skb allocation size for responses 2008-03-31 21:02:47 -07:00
llc.h [LLC]: station source mac address 2008-03-28 16:28:36 -07:00
mac80211.h mac80211: notify mac from low level driver (iwlwifi) 2008-04-08 16:44:43 -04:00
mip6.h [IPV6] MIP6: Use our standard definitions for paddings. 2008-04-12 13:43:22 +09:00
ndisc.h [IPV6]: Make address arguments const. 2008-04-12 13:43:18 +09:00
neighbour.h Merge branch 'master' of git://git.kernel.org/pub/scm/linux/kernel/git/davem/net-2.6 2008-03-27 18:48:56 -07:00
net_namespace.h [NETNS]: The generic per-net pointers. 2008-04-15 00:36:08 -07:00
netdma.h
netevent.h
netlabel.h NetLabel: Allow passing the LSM domain as a shared pointer 2008-04-12 19:06:42 -07:00
netlink.h
netrom.h
nexthop.h
p8022.h
pkt_cls.h [PKT_SCHED]: Pass real namespace in net scheduler classifiers. 2008-03-27 16:53:37 -07:00
pkt_sched.h
protocol.h [NETNS]: Drop packets in the non-initial namespace on the per/protocol basis. 2008-03-24 15:33:00 -07:00
psnap.h
raw.h [RAW]: Add raw_hashinfo member on struct proto. 2008-03-22 16:56:51 -07:00
rawv6.h
red.h
request_sock.h [Syncookies]: Add support for TCP options via timestamps. 2008-04-10 03:12:40 -07:00
rose.h
route.h [NET] NETNS: Omit sock->sk_net without CONFIG_NET_NS. 2008-03-26 04:39:55 +09:00
rtnetlink.h
sch_generic.h
scm.h
slhc_vj.h
snmp.h
sock.h socket: sk_filter deinline 2008-04-10 01:43:09 -07:00
syncppp.h
tcp_states.h
tcp.h Merge branch 'master' of master.kernel.org:/pub/scm/linux/kernel/git/davem/net-2.6 2008-04-14 02:30:23 -07:00
timewait_sock.h
transp_v6.h [UDP]: Revert udplite and code split. 2008-03-06 16:22:02 -08:00
udp.h [SOCK][NETNS]: Add a struct net argument to sock_prot_inuse_add and _get. 2008-03-31 19:41:46 -07:00
udplite.h [UDP]: Revert udplite and code split. 2008-03-06 16:22:02 -08:00
wext.h
wireless.h cfg80211: don't export ieee80211_get_channel 2008-03-27 16:03:20 -04:00
x25.h
x25device.h
xfrm.h Merge branch 'master' of git://git.kernel.org/pub/scm/linux/kernel/git/davem/net-2.6 2008-03-27 18:48:56 -07:00