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android_kernel_motorola_sm6225/include/net
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Herbert Xu f845172531 cls_cgroup: Store classid in struct sock 
Up until now cls_cgroup has relied on fetching the classid out of
the current executing thread.  This runs into trouble when a packet
processing is delayed in which case it may execute out of another
thread's context.

Furthermore, even when a packet is not delayed we may fail to
classify it if soft IRQs have been disabled, because this scenario
is indistinguishable from one where a packet unrelated to the
current thread is processed by a real soft IRQ.

In fact, the current semantics is inherently broken, as a single
skb may be constructed out of the writes of two different tasks.
A different manifestation of this problem is when the TCP stack
transmits in response of an incoming ACK.  This is currently
unclassified.

As we already have a concept of packet ownership for accounting
purposes in the skb->sk pointer, this is a natural place to store
the classid in a persistent manner.

This patch adds the cls_cgroup classid in struct sock, filling up
an existing hole on 64-bit :)

The value is set at socket creation time.  So all sockets created
via socket(2) automatically gains the ID of the thread creating it.
Whenever another process touches the socket by either reading or
writing to it, we will change the socket classid to that of the
process if it has a valid (non-zero) classid.

For sockets created on inbound connections through accept(2), we
inherit the classid of the original listening socket through
sk_clone, possibly preceding the actual accept(2) call.

In order to minimise risks, I have not made this the authoritative
classid.  For now it is only used as a backup when we execute
with soft IRQs disabled.  Once we're completely happy with its
semantics we can use it as the sole classid.

Footnote: I have rearranged the error path on cls_group module
creation.  If we didn't do this, then there is a window where
someone could create a tc rule using cls_group before the cgroup
subsystem has been registered.

Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
Signed-off-by: David S. Miller <davem@davemloft.net>
2010-05-24 00:12:34 -07:00
..
9p 9p: Make sure we are able to clunk the cached fid on umount 2010-04-05 10:37:36 -05:00
bluetooth Bluetooth: Create per controller workqueue 2010-05-10 09:34:03 +02:00
caif caif: Bugfix - use standard Linux lists 2010-05-23 23:57:41 -07:00
irda tree-wide: fix typos "ass?o[sc]iac?te" -> "associate" in comments 2010-02-15 15:38:10 +01:00
iucv include cleanup: Update gfp.h and slab.h includes to prepare for breaking implicit slab.h inclusion from percpu.h 2010-03-30 22:02:32 +09:00
netfilter netfilter: nf_conntrack: fix a race in __nf_conntrack_confirm against nf_ct_get_next_corpse() 2010-05-20 15:55:30 +02:00
netns ipv6: ip6mr: support multiple tables 2010-05-11 14:40:55 +02:00
phonet Phonet: zero-copy GPRS TX 2010-01-07 00:24:55 -08:00
sctp Merge branch 'master' of master.kernel.org:/pub/scm/linux/kernel/git/davem/net-2.6 2010-05-12 00:05:35 -07:00
tc_act pkt_sched: skbedit add support for setting mark 2009-10-22 21:56:42 -07:00
tipc tipc: Update commenting in TIPC API 2010-05-12 23:02:23 -07:00
act_api.h net: restore gnet_stats_basic to previous definition 2009-08-17 21:33:49 -07:00
addrconf.h net: Add checking to rcu_dereference() primitives 2010-02-25 09:41:03 +01:00
af_ieee802154.h af_ieee802154: add support for WANT_ACK socket option 2009-08-12 21:54:50 -07:00
af_rxrpc.h
af_unix.h net: sock_def_readable() and friends RCU conversion 2010-05-01 15:00:15 -07:00
ah.h net: cleanup include/net 2009-11-04 05:06:25 -08:00
arp.h net: make neigh_ops constant 2009-09-01 17:40:57 -07:00
atmclip.h clip: convert to internal network_device_stats 2009-01-21 14:01:59 -08:00
ax25.h include cleanup: Update gfp.h and slab.h includes to prepare for breaking implicit slab.h inclusion from percpu.h 2010-03-30 22:02:32 +09:00
ax88796.h ax88796: Add method to take MAC from platform data 2009-03-24 23:32:03 -07:00
cfg80211.h cfg80211/mac80211: better channel handling 2010-05-07 14:55:50 -04:00
checksum.h include/net net/ - csum_partial - remove unnecessary casts 2008-11-19 15:44:53 -08:00
cipso_ipv4.h netlabel: Label incoming TCP connections correctly in SELinux 2009-03-28 15:01:36 +11:00
cls_cgroup.h cls_cgroup: Store classid in struct sock 2010-05-24 00:12:34 -07:00
compat.h net: fix compat_sys_recvmmsg parameter type 2009-12-11 15:07:56 -08:00
datalink.h
dcbnl.h dcbnl: Add support for setapp/getapp to netdev dcbnl_rtnl_ops 2009-09-01 01:24:30 -07:00
dn.h decnet: compile fix for removal of byteorder wrapper 2008-11-27 23:04:13 -08:00
dn_dev.h Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net-next-2.6 2009-12-08 07:55:01 -08:00
dn_fib.h decnet: Remove unused FIB metric macros. 2010-03-27 19:23:46 -07:00
dn_neigh.h
dn_nsp.h net: cleanup include/net 2009-11-04 05:06:25 -08:00
dn_route.h
dsa.h dsa: add switch chip cascading support 2009-03-21 19:06:54 -07:00
dsfield.h
dst.h net: Introduce skb_tunnel_rx() helper 2010-05-17 22:36:55 -07:00
dst_ops.h netns: embed ip6_dst_ops directly 2009-09-01 17:40:31 -07:00
esp.h
ethoc.h net: Add support for the OpenCores 10/100 Mbps Ethernet MAC. 2009-03-27 00:16:21 -07:00
fib_rules.h net: fib_rules: mark arguments to fib_rules_register const and __net_initdata 2010-04-26 16:02:04 +02:00
flow.h flow: virtualize flow cache entry methods 2010-04-07 03:43:18 -07:00
garp.h vlan: Add GVRP support 2008-07-05 21:26:57 -07:00
gen_stats.h net: cleanup include/net 2009-11-04 05:06:25 -08:00
genetlink.h net: cleanup include/net 2009-11-04 05:06:25 -08:00
icmp.h ipv4: raw: move struct raw_sock and raw_sk() to include/net/raw.h 2010-04-13 14:49:31 -07:00
ieee80211_radiotap.h wireless: update radiotap parser 2010-02-08 16:50:53 -05:00
ieee802154.h ieee802154: move headers out of extra directory 2009-07-23 17:08:51 +04:00
ieee802154_netdev.h ieee802154: add an mlme_ops call to retrieve PHY object 2009-11-06 14:32:18 +03:00
if_inet6.h ipv6: Replace inet6_ifaddr->dead with state 2010-05-18 15:36:06 -07:00
inet6_connection_sock.h net: replace ipfragok with skb->local_df 2010-04-15 23:36:37 -07:00
inet6_hashtables.h tcp: Fix a connect() race with timewait sockets 2009-12-08 20:17:51 -08:00
inet_common.h
inet_connection_sock.h net: replace ipfragok with skb->local_df 2010-04-15 23:36:37 -07:00
inet_ecn.h net: replace __constant_{endian} uses in net headers 2009-02-14 22:58:35 -08:00
inet_frag.h inet fragments: fix sparse warning: context imbalance 2009-02-26 23:13:35 -08:00
inet_hashtables.h tcp: Fix a connect() race with timewait sockets 2009-12-08 20:17:51 -08:00
inet_sock.h net: Make RFS socket operations not be inet specific. 2010-04-27 15:11:48 -07:00
inet_timewait_sock.h net: suppress RCU lockdep false positive in twsk_net() 2010-04-27 12:39:01 -07:00
inetpeer.h inetpeer: Optimize inet_getid() 2009-11-13 20:46:58 -08:00
ip.h net: reserve ports for applications using fixed port numbers 2010-05-15 23:28:40 -07:00
ip6_checksum.h
ip6_fib.h ipv6 fib: Make rt6_info{} more cache-line aware. 2010-04-01 18:41:41 -07:00
ip6_route.h net: sk_dst_cache RCUification 2010-04-13 01:41:33 -07:00
ip6_tunnel.h ipv6 ip6_tunnel: eliminate unused recursion field from ip6_tnl{}. 2010-03-10 07:32:29 -08:00
ip_fib.h Merge branch 'master' of master.kernel.org:/pub/scm/linux/kernel/git/davem/net-2.6 2009-11-06 00:55:55 -08:00
ip_vs.h ipvs: SCTP Trasport Loadbalancing Support 2010-02-18 12:31:05 +01:00
ipcomp.h percpu: add __percpu sparse annotations to net 2010-02-16 23:05:38 -08:00
ipconfig.h net: remove CVS keywords 2008-06-11 21:00:38 -07:00
ipip.h net: cleanup include/net 2009-11-04 05:06:25 -08:00
ipv6.h IPv6: Complete IPV6_DONTFRAG support 2010-04-23 23:35:29 -07:00
ipx.h include cleanup: Update gfp.h and slab.h includes to prepare for breaking implicit slab.h inclusion from percpu.h 2010-03-30 22:02:32 +09:00
iw_handler.h include/net/iw_handler.h: Use SIOCIWFIRST not SIOCSIWCOMMIT in comment 2010-03-31 14:49:12 -04:00
lapb.h
lib80211.h wireless: missing include in lib80211.h 2008-11-21 11:42:55 -05:00
llc.h llc: convert llc_sap_list to RCU 2009-12-26 20:46:28 -08:00
llc_c_ac.h
llc_c_ev.h
llc_c_st.h
llc_conn.h llc: use a device based hash table to speed up multicast delivery 2009-12-26 20:43:57 -08:00
llc_if.h
llc_pdu.h
llc_s_ac.h
llc_s_ev.h
llc_s_st.h
llc_sap.h
mac80211.h Merge branch 'master' of git://git.kernel.org/pub/scm/linux/kernel/git/linville/wireless-next-2.6 into for-davem 2010-05-17 13:57:43 -04:00
mip6.h
mld.h ipv6 mcast: Introduce include/net/mld.h for MLD definitions. 2010-04-23 13:35:55 +09:00
ndisc.h sysctl: remove "struct file *" argument of ->proc_handler 2009-09-24 07:21:04 -07:00
neighbour.h netfilter: bridge-netfilter: Fix MAC header handling with IP DNAT 2010-04-15 12:26:39 +02:00
net_namespace.h nsproxy: remove INIT_NSPROXY() 2010-03-12 15:52:40 -08:00
netdma.h net_dma: convert to dma_find_channel 2009-01-06 11:38:15 -07:00
netevent.h
netlabel.h include cleanup: Update gfp.h and slab.h includes to prepare for breaking implicit slab.h inclusion from percpu.h 2010-03-30 22:02:32 +09:00
netlink.h netlink: fix unaligned access in nla_get_be64() 2010-03-19 22:47:23 -07:00
netrom.h include cleanup: Update gfp.h and slab.h includes to prepare for breaking implicit slab.h inclusion from percpu.h 2010-03-30 22:02:32 +09:00
nexthop.h
nl802154.h ieee802154: add support for channel pages from IEEE 802.15.4-2006 2009-08-19 23:08:22 +04:00
p8022.h
pkt_cls.h net: rename skb->iif to skb->skb_iif 2009-11-20 15:35:04 -08:00
pkt_sched.h gen_estimator: deadlock fix 2010-04-01 18:38:48 -07:00
protocol.h net: drop capability from protocol definitions 2009-11-05 21:40:17 -08:00
psnap.h snap: use const for descriptor 2009-03-21 19:06:50 -07:00
raw.h ipv4: ipmr: support multiple tables 2010-04-13 14:49:34 -07:00
rawv6.h ipv6: Use correct data types for ICMPv6 type and code 2009-06-23 04:31:07 -07:00
red.h net: cleanup include/net 2009-11-04 05:06:25 -08:00
regulatory.h cfg80211: add regulatory hint disconnect support 2010-02-01 15:40:06 -05:00
request_sock.h tcp: account SYN-ACK timeouts & retransmissions 2010-01-17 19:09:39 -08:00
rose.h NET: ROSE: Don't use static buffer. 2009-07-26 19:11:14 -07:00
route.h net: implements ip_route_input_noref() 2010-05-17 17:18:51 -07:00
rtnetlink.h rtnetlink: support specifying device flags on device creation 2010-02-27 02:43:40 -08:00
sch_generic.h gen_estimator: deadlock fix 2010-04-01 18:38:48 -07:00
scm.h net: cleanup include/net 2009-11-04 05:06:25 -08:00
slhc_vj.h
snmp.h tcp: fix outsegs stat for TSO segments 2010-04-22 16:00:00 -07:00
sock.h cls_cgroup: Store classid in struct sock 2010-05-24 00:12:34 -07:00
stp.h net: Add STP demux layer 2008-07-05 21:25:39 -07:00
tcp.h Merge branch 'master' of master.kernel.org:/pub/scm/linux/kernel/git/davem/net-2.6 2010-05-16 22:26:58 -07:00
tcp_states.h
timewait_sock.h net: Fix memory leak in the proto_register function 2008-11-21 16:45:22 -08:00
transp_v6.h IPv6: Add dontfrag argument to relevant functions 2010-04-23 23:35:28 -07:00
udp.h udp: bind() optimisation 2009-11-10 20:54:38 -08:00
udplite.h udp: introduce struct udp_table and multiple spinlocks 2008-10-29 01:41:45 -07:00
wext.h wext: refactor 2009-10-07 16:39:43 -04:00
wimax.h Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/jikos/trivial 2009-12-09 19:43:33 -08:00
wpan-phy.h ieee802154: add support for creation/removal of logic interfaces 2009-11-06 14:32:24 +03:00
x25.h X25: Move accept approve flag to bitfield 2010-05-17 17:39:27 -07:00
x25device.h X25: Add if_x25.h and x25 to device identifiers 2010-04-22 16:12:36 -07:00
xfrm.h Merge branch 'master' of master.kernel.org:/pub/scm/linux/kernel/git/davem/net-2.6 2010-04-11 14:53:53 -07:00