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David S. Miller 2518c7c2b3 [XFRM]: Hash policies when non-prefixed. 
This idea is from Alexey Kuznetsov.

It is common for policies to be non-prefixed.  And for
that case we can optimize lookups, insert, etc. quite
a bit.

For each direction, we have a dynamically sized policy
hash table for non-prefixed policies.  We also have a
hash table on policy->index.

For prefixed policies, we have a list per-direction which
we will consult on lookups when a non-prefix hashtable
lookup fails.

This still isn't as efficient as I would like it.  There
are four immediate problems:

1) Lots of excessive refcounting, which can be fixed just
   like xfrm_state was
2) We do 2 hash probes on insert, one to look for dups and
   one to allocate a unique policy->index.  Althought I wonder
   how much this matters since xfrm_state inserts do up to
   3 hash probes and that seems to perform fine.
3) xfrm_policy_insert() is very complex because of the priority
   ordering and entry replacement logic.
4) Lots of counter bumping, in addition to policy refcounts,
   in the form of xfrm_policy_count[].  This is merely used
   to let code path(s) know that some IPSEC rules exist.  So
   this count is indexed per-direction, maybe that is overkill.

Signed-off-by: David S. Miller <davem@davemloft.net>
2006-09-22 15:08:48 -07:00
..
bluetooth [Bluetooth] Use real devices for host controllers 2006-07-03 19:54:02 -07:00
irda [PATCH] irq-flags: drivers/net: Use the new IRQF_ constants 2006-07-02 13:58:51 -07:00
netfilter Merge git://git.infradead.org/hdrcleanup-2.6 2006-06-20 15:10:08 -07:00
sctp [SCTP]: Remove multiple levels of msecs to jiffies conversions. 2006-09-22 14:55:39 -07:00
tc_act [PKT_SCHED]: Kill pkt_act.h inlining. 2006-09-22 14:55:10 -07:00
tipc [TIPC]: Corrected potential misuse of tipc_media_addr structure. 2006-06-25 23:38:29 -07:00
act_api.h [PKT_SCHED]: Kill pkt_act.h inlining. 2006-09-22 14:55:10 -07:00
addrconf.h [IPV6] MIP6: Add inbound interface of routing header type 2. 2006-09-22 15:06:48 -07:00
af_unix.h [AF_UNIX]: Kernel memory leak fix for af_unix datagram getpeersec patch 2006-08-02 14:12:06 -07:00
ah.h [IPSEC]: Use HMAC template and hash interface 2006-09-21 11:46:18 +10:00
arp.h [IPV4]: Possible cleanups. 2006-04-14 15:00:20 -07:00
atmclip.h [INET_SOCK]: Move struct inet_sock & helper functions to net/inet_sock.h 2006-01-03 13:11:21 -08:00
ax25.h [AX.25]: Reference counting for AX.25 routes. 2006-07-03 19:30:18 -07:00
checksum.h
cipso_ipv4.h [NetLabel]: core network changes 2006-09-22 14:53:32 -07:00
compat.h Merge git://git.infradead.org/hdrcleanup-2.6 2006-06-20 15:10:08 -07:00
datalink.h
dn.h [DECnet]: Endian annotation and fixes for DECnet. 2006-03-20 22:42:39 -08:00
dn_dev.h [DECnet]: Endian annotation and fixes for DECnet. 2006-03-20 22:42:39 -08:00
dn_fib.h [DECNET]: cleanups 2006-09-22 14:54:40 -07:00
dn_neigh.h [DECnet]: Endian annotation and fixes for DECnet. 2006-03-20 22:42:39 -08:00
dn_nsp.h [DECnet]: Endian annotation and fixes for DECnet. 2006-03-20 22:42:39 -08:00
dn_route.h [DECnet]: Endian annotation and fixes for DECnet. 2006-03-20 22:42:39 -08:00
dsfield.h
dst.h [XFRM] STATE: Support non-fragment outbound transformation headers. 2006-09-22 15:06:41 -07:00
esp.h [IPSEC]: Use HMAC template and hash interface 2006-09-21 11:46:18 +10:00
fib_rules.h [NET]: Introduce RTA_TABLE/FRA_TABLE attributes 2006-09-22 14:54:25 -07:00
flow.h [IPV6] MIP6: Add Mobility header definition. 2006-09-22 15:07:00 -07:00
gen_stats.h
genetlink.h [NETLINK]: Add notification message sending interface 2006-09-22 14:54:49 -07:00
icmp.h Don't include linux/config.h from anywhere else in include/ 2006-04-26 12:56:16 +01:00
ieee80211.h [PATCH] wireless: Changes to ieee80211.h for user space regulatory daemon 2006-06-15 15:48:13 -04:00
ieee80211_crypt.h [PATCH] ieee80211: Add TKIP crypt->build_iv 2006-01-27 17:08:07 -05:00
ieee80211_radiotap.h
ieee80211softmac.h [PATCH] SoftMAC: Prevent multiple authentication attempts on the same network 2006-07-05 13:42:58 -04:00
ieee80211softmac_wx.h [PATCH] softmac: add SIOCSIWMLME 2006-04-24 16:15:58 -04:00
if_inet6.h [IPV6]: ADDRCONF: Use our standard algorithm for randomized ifid. 2006-03-20 16:54:09 -08:00
inet6_connection_sock.h [IPV6]: Generalise some functions 2006-01-03 13:10:46 -08:00
inet6_hashtables.h Don't include linux/config.h from anywhere else in include/ 2006-04-26 12:56:16 +01:00
inet_common.h [NET]: move struct proto_ops to const 2006-01-03 13:11:15 -08:00
inet_connection_sock.h [ICSK] compat: Introduce inet_csk_compat_[gs]etsockopt 2006-03-20 22:46:16 -08:00
inet_ecn.h [INET_SOCK]: Move struct inet_sock & helper functions to net/inet_sock.h 2006-01-03 13:11:21 -08:00
inet_hashtables.h [IPV4]: Use network-order dport for all visible inet_lookup_* 2006-09-22 14:54:14 -07:00
inet_sock.h [INET]: Remove is_setbyuser patch 2006-09-22 14:54:10 -07:00
inet_timewait_sock.h Merge git://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux-2.6 2006-05-06 19:59:18 +01:00
inetpeer.h [IPV4]: Safer reassembly 2006-01-03 13:10:31 -08:00
ip.h Merge git://git.infradead.org/hdrcleanup-2.6 2006-06-20 15:10:08 -07:00
ip6_checksum.h
ip6_fib.h [IPV6] ROUTE: Unify RT6_F_xxx and RT6_SELECT_F_xxx flags 2006-09-22 14:55:56 -07:00
ip6_route.h [IPV6] ROUTE: Unify RT6_F_xxx and RT6_SELECT_F_xxx flags 2006-09-22 14:55:56 -07:00
ip6_tunnel.h
ip_fib.h [IPv4]: Convert route get to new netlink api 2006-09-22 14:55:06 -07:00
ip_mp_alg.h Don't include linux/config.h from anywhere else in include/ 2006-04-26 12:56:16 +01:00
ip_vs.h Don't include linux/config.h from anywhere else in include/ 2006-04-26 12:56:16 +01:00
ipcomp.h [CRYPTO] users: Use crypto_comp and crypto_has_* 2006-09-21 11:46:22 +10:00
ipconfig.h
ipip.h
ipv6.h [IPV6] MIP6: Add Mobility header definition. 2006-09-22 15:07:00 -07:00
ipx.h
iw_handler.h [PATCH] WE-20 for kernel 2.6.16 2006-03-23 07:12:57 -05:00
lapb.h
llc.h [LLC]: llc_mac_hdr_init const arguments 2006-03-20 22:59:36 -08:00
llc_c_ac.h
llc_c_ev.h
llc_c_st.h
llc_conn.h
llc_if.h [LLC]: add multicast support for datagrams 2006-06-17 21:26:08 -07:00
llc_pdu.h
llc_s_ac.h
llc_s_ev.h
llc_s_st.h
llc_sap.h
mip6.h [IPV6] MIP6: Add receiving mobility header functions through raw socket. 2006-09-22 15:07:01 -07:00
ndisc.h Don't include linux/config.h from anywhere else in include/ 2006-04-26 12:56:16 +01:00
neighbour.h [NEIGHBOUR]: Use ALIGN() macro. 2006-09-22 14:54:23 -07:00
netdma.h [NET]: Fix more per-cpu typos 2006-08-02 15:02:31 -07:00
netevent.h [NET]: Network Event Notifier Mechanism. 2006-08-02 13:38:20 -07:00
netlabel.h [NetLabel]: core network changes 2006-09-22 14:53:32 -07:00
netlink.h [IPv4]: FIB configuration using struct fib_config 2006-09-22 14:55:04 -07:00
netrom.h [NETROM]: Eleminate HZ from NET/ROM kernel interfaces 2006-05-03 23:27:47 -07:00
nexthop.h [IPv4]: FIB configuration using struct fib_config 2006-09-22 14:55:04 -07:00
p8022.h
pkt_cls.h
pkt_sched.h [PKT_SCHED]: Fix regression in PSCHED_TADD{,2}. 2006-07-24 12:44:23 -07:00
protocol.h [NET] gso: Fix up GSO packets with broken checksums 2006-07-08 13:34:56 -07:00
psnap.h
raw.h Merge git://git.infradead.org/hdrcleanup-2.6 2006-06-20 15:10:08 -07:00
rawv6.h
red.h [PKT_SCHED] RED: Fix overflow in calculation of queue average 2006-08-04 22:59:51 -07:00
request_sock.h [MLSXFRM]: Auto-labeling of child sockets 2006-09-22 14:53:29 -07:00
rose.h [ROSE]: Eleminate HZ from ROSE kernel interfaces 2006-05-03 23:28:20 -07:00
route.h [MLSXFRM]: Add flow labeling 2006-09-22 14:53:27 -07:00
sch_generic.h Don't include linux/config.h from anywhere else in include/ 2006-04-26 12:56:16 +01:00
scm.h [AF_UNIX]: Kernel memory leak fix for af_unix datagram getpeersec patch 2006-08-02 14:12:06 -07:00
slhc_vj.h
snmp.h [SCTP]: Extend /proc/net/sctp/snmp to provide more statistics. 2006-09-22 14:55:16 -07:00
sock.h [MLSXFRM]: Auto-labeling of child sockets 2006-09-22 14:53:29 -07:00
syncppp.h
tcp.h [TCP]: SNMPv2 tcpAttemptFails counter error 2006-08-02 13:38:19 -07:00
tcp_ecn.h [IPV6]: Added GSO support for TCPv6 2006-06-30 14:12:10 -07:00
tcp_states.h [TCP]: Move the TCPF_ enum to tcp_states.h 2006-01-03 13:10:57 -08:00
timewait_sock.h [TWSK]: Introduce struct timewait_sock_ops 2006-01-03 13:10:54 -08:00
transp_v6.h [ICSK]: Rename struct tcp_func to struct inet_connection_sock_af_ops 2006-01-03 13:10:38 -08:00
udp.h [INET_SOCK]: Move struct inet_sock & helper functions to net/inet_sock.h 2006-01-03 13:11:21 -08:00
x25.h [X25]: allow ITU-T DTE facilities for x25 2006-03-22 00:01:31 -08:00
x25device.h [X25]: Restore skb->dev setting in x25_type_trans(). 2006-04-09 22:37:18 -07:00
xfrm.h [XFRM]: Hash policies when non-prefixed. 2006-09-22 15:08:48 -07:00