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2009-12-03net: Allow fib_rule_unregister to batchEric W. Biederman
Refactor the code so fib_rules_register always takes a template instead of the actual fib_rules_ops structure that will be used. This is required for network namespace support so 2 out of the 3 callers already do this, it allows the error handling to be made common, and it allows fib_rules_unregister to free the template for hte caller. Modify fib_rules_unregister to use call_rcu instead of syncrhonize_rcu to allw multiple namespaces to be cleaned up in the same rcu grace period. Signed-off-by: Eric W. Biederman <ebiederm@xmission.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2009-12-03net 04/05: fib_rules: allow to delete local rulePatrick McHardy
commit d124356ce314fff22a047ea334379d5105b2d834 Author: Patrick McHardy <kaber@trash.net> Date: Thu Dec 3 12:16:35 2009 +0100 net: fib_rules: allow to delete local rule Allow to delete the local rule and recreate it with a higher priority. This can be used to force packets with a local destination out on the wire instead of routing them to loopback. Additionally this patch allows to recreate rules with a priority of 0. Combined with the previous patch to allow oif classification, a socket can be bound to the desired interface and packets routed to the wire like this: # move local rule to lower priority ip rule add pref 1000 lookup local ip rule del pref 0 # route packets of sockets bound to eth0 to the wire independant # of the destination address ip rule add pref 100 oif eth0 lookup 100 ip route add default dev eth0 table 100 Signed-off-by: Patrick McHardy <kaber@trash.net> Signed-off-by: David S. Miller <davem@davemloft.net>
2009-12-03TCPCT part 1g: Responder Cookie => InitiatorWilliam Allen Simpson
Parse incoming TCP_COOKIE option(s). Calculate <SYN,ACK> TCP_COOKIE option. Send optional <SYN,ACK> data. This is a significantly revised implementation of an earlier (year-old) patch that no longer applies cleanly, with permission of the original author (Adam Langley): http://thread.gmane.org/gmane.linux.network/102586 Requires: TCPCT part 1a: add request_values parameter for sending SYNACK TCPCT part 1b: generate Responder Cookie secret TCPCT part 1c: sysctl_tcp_cookie_size, socket option TCP_COOKIE_TRANSACTIONS TCPCT part 1d: define TCP cookie option, extend existing struct's TCPCT part 1e: implement socket option TCP_COOKIE_TRANSACTIONS TCPCT part 1f: Initiator Cookie => Responder Signed-off-by: William.Allen.Simpson@gmail.com Signed-off-by: David S. Miller <davem@davemloft.net>
2009-12-03TCPCT part 1d: define TCP cookie option, extend existing struct'sWilliam Allen Simpson
Data structures are carefully composed to require minimal additions. For example, the struct tcp_options_received cookie_plus variable fits between existing 16-bit and 8-bit variables, requiring no additional space (taking alignment into consideration). There are no additions to tcp_request_sock, and only 1 pointer in tcp_sock. This is a significantly revised implementation of an earlier (year-old) patch that no longer applies cleanly, with permission of the original author (Adam Langley): http://thread.gmane.org/gmane.linux.network/102586 The principle difference is using a TCP option to carry the cookie nonce, instead of a user configured offset in the data. This is more flexible and less subject to user configuration error. Such a cookie option has been suggested for many years, and is also useful without SYN data, allowing several related concepts to use the same extension option. "Re: SYN floods (was: does history repeat itself?)", September 9, 1996. http://www.merit.net/mail.archives/nanog/1996-09/msg00235.html "Re: what a new TCP header might look like", May 12, 1998. ftp://ftp.isi.edu/end2end/end2end-interest-1998.mail These functions will also be used in subsequent patches that implement additional features. Requires: TCPCT part 1a: add request_values parameter for sending SYNACK TCPCT part 1b: generate Responder Cookie secret TCPCT part 1c: sysctl_tcp_cookie_size, socket option TCP_COOKIE_TRANSACTIONS Signed-off-by: William.Allen.Simpson@gmail.com Signed-off-by: David S. Miller <davem@davemloft.net>
2009-12-03TCPCT part 1a: add request_values parameter for sending SYNACKWilliam Allen Simpson
Add optional function parameters associated with sending SYNACK. These parameters are not needed after sending SYNACK, and are not used for retransmission. Avoids extending struct tcp_request_sock, and avoids allocating kernel memory. Also affects DCCP as it uses common struct request_sock_ops, but this parameter is currently reserved for future use. Signed-off-by: William.Allen.Simpson@gmail.com Acked-by: Eric Dumazet <eric.dumazet@gmail.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2009-12-02net: Simplify ipip6 aka sit pernet operations.Eric W. Biederman
Take advantage of the new pernet automatic storage management, and stop using compatibility network namespace functions. Signed-off-by: Eric W. Biederman <ebiederm@xmission.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2009-12-02net: Simplify ip6_tunnel pernet operations.Eric W. Biederman
Take advantage of the new pernet automatic storage management, and stop using compatibility network namespace functions. Signed-off-by: Eric W. Biederman <ebiederm@xmission.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2009-11-25xfrm: Use the user specified truncation length in ESP and AHMartin Willi
Instead of using the hardcoded truncation for authentication algorithms, use the truncation length specified on xfrm_state. Signed-off-by: Martin Willi <martin@strongswan.org> Signed-off-by: David S. Miller <davem@davemloft.net>
2009-11-25net: use net_eq to compare netsOctavian Purdila
Generated with the following semantic patch @@ struct net *n1; struct net *n2; @@ - n1 == n2 + net_eq(n1, n2) @@ struct net *n1; struct net *n2; @@ - n1 != n2 + !net_eq(n1, n2) applied over {include,net,drivers/net}. Signed-off-by: Octavian Purdila <opurdila@ixiacom.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2009-11-24net/ipv6: Move && and || to end of previous lineJoe Perches
Signed-off-by: Joe Perches <joe@perches.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2009-11-18netns: net_identifiers should be read_mostlyEric Dumazet
Signed-off-by: Eric Dumazet <eric.dumazet@gmail.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2009-11-14ipv6: speedup inet6_dump_addr()Eric Dumazet
When handling large number of netdevices, inet6_dump_addr() is very slow because it has O(N^2) complexity. Instead of scanning one single list, we can use the NETDEV_HASHENTRIES sub lists of the dev_index hash table, and RCU lookups. Signed-off-by: Eric Dumazet <eric.dumazet@gmail.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2009-11-14ipv6: use RCU to walk list of network devicesEric Dumazet
No longer need read_lock(&dev_base_lock), use RCU instead. We also can avoid taking references on inet6_dev structs. Signed-off-by: Eric Dumazet <eric.dumazet@gmail.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2009-11-14net: TCP_MSS_DEFAULT, TCP_MSS_DESIREDWilliam Allen Simpson
Define two symbols needed in both kernel and user space. Remove old (somewhat incorrect) kernel variant that wasn't used in most cases. Default should apply to both RMSS and SMSS (RFC2581). Replace numeric constants with defined symbols. Stand-alone patch, originally developed for TCPCT. Signed-off-by: William.Allen.Simpson@gmail.com Acked-by: Eric Dumazet <eric.dumazet@gmail.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2009-11-12ipv6: Remove unused var in inet6_dump_ifinfo()David S. Miller
Reported by Stephen Rothwell: -------------------- Today's linux-next build (x86_64 allmodconfig) produced this warning: net/ipv6/addrconf.c: In function 'inet6_dump_ifinfo': net/ipv6/addrconf.c:3833: warning: unused variable 'err' Introduced by commit 84d2697d9649339215675551eae28ba04068dea1 ("ipv6: speedup inet6_dump_ifinfo()"). -------------------- Signed-off-by: David S. Miller <davem@davemloft.net>
2009-11-11IPv6: use ipv6_addr_v4mapped()Brian Haley
Change udp6_portaddr_hash() to use ipv6_addr_v4mapped() inline instead of ipv6_addr_type(). Signed-off-by: Brian Haley <brian.haley@hp.com> Acked-by: Eric Dumazet <eric.dumazet@gmail.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2009-11-11sit: Clean up DF code by copying from IPIPHerbert Xu
This patch rearranges the SIT DF bit handling using the new IPIP DF code. The only externally visible effect should be the case where PMTU is enabled and the MTU is exactly 1280 bytes. In this case the previous code would send packets out with DF off while the new code would set the DF bit. This is inline with RFC 4213. Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au> Thanks, Signed-off-by: David S. Miller <davem@davemloft.net>
2009-11-11ipv6: Allow inet6_dump_addr() to handle more than 64 addressesEric Dumazet
Apparently, inet6_dump_addr() is not able to handle more than 64 ipv6 addresses per device. We must break from inner loops in case skb is full, or else cursor is put at the end of list. Signed-off-by: Eric Dumazet <eric.dumazet@gmail.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2009-11-11ipv6: speedup inet6_dump_ifinfo()Eric Dumazet
When handling large number of netdevice, inet6_dump_ifinfo() is very slow because it has O(N^2) complexity. Instead of scanning one single list, we can use the 256 sub lists of the dev_index hash table, and RCU lookups. Signed-off-by: Eric Dumazet <eric.dumazet@gmail.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2009-11-11udp: bind() optimisationEric Dumazet
UDP bind() can be O(N^2) in some pathological cases. Thanks to secondary hash tables, we can make it O(N) Signed-off-by: Eric Dumazet <eric.dumazet@gmail.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2009-11-09udp: multicast RX should increment SNMP/sk_drops counter in allocation failuresEric Dumazet
When skb_clone() fails, we should increment sk_drops and SNMP counters. Signed-off-by: Eric Dumazet <eric.dumazet@gmail.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2009-11-09ipv6: udp: Optimise multicast receptionEric Dumazet
IPV6 UDP multicast rx path is a bit complex and can hold a spinlock for a long time. Using a small (32 or 64 entries) stack of socket pointers can help to perform expensive operations (skb_clone(), udp_queue_rcv_skb()) outside of the lock, in most cases. Signed-off-by: Eric Dumazet <eric.dumazet@gmail.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2009-11-09ipv6: udp: optimize unicast RX pathEric Dumazet
We first locate the (local port) hash chain head If few sockets are in this chain, we proceed with previous lookup algo. If too many sockets are listed, we take a look at the secondary (port, address) hash chain. We choose the shortest chain and proceed with a RCU lookup on the elected chain. But, if we chose (port, address) chain, and fail to find a socket on given address, we must try another lookup on (port, in6addr_any) chain to find sockets not bound to a particular IP. -> No extra cost for typical setups, where the first lookup will probabbly be performed. RCU lookups everywhere, we dont acquire spinlock. Signed-off-by: Eric Dumazet <eric.dumazet@gmail.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2009-11-09udp: split sk_hash into two u16 hashesEric Dumazet
Union sk_hash with two u16 hashes for udp (no extra memory taken) One 16 bits hash on (local port) value (the previous udp 'hash') One 16 bits hash on (local address, local port) values, initialized but not yet used. This second hash is using jenkin hash for better distribution. Because the 'port' is xored later, a partial hash is performed on local address + net_hash_mix(net) Signed-off-by: Eric Dumazet <eric.dumazet@gmail.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2009-11-08ipv6: avoid dev_hold()/dev_put() in rawv6_bind()Eric Dumazet
Using RCU helps not touching device refcount in rawv6_bind() Signed-off-by: Eric Dumazet <eric.dumazet@gmail.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2009-11-06Merge branch 'master' of ↵David S. Miller
master.kernel.org:/pub/scm/linux/kernel/git/davem/net-2.6 Conflicts: drivers/net/usb/cdc_ether.c All CDC ethernet devices of type USB_CLASS_COMM need to use '&mbm_info'. Signed-off-by: David S. Miller <davem@davemloft.net>
2009-11-06ip_frag: dont touch device refcountEric Dumazet
When sending fragmentation expiration ICMP V4/V6 messages, we can avoid touching device refcount, thanks to RCU Signed-off-by: Eric Dumazet <eric.dumazet@gmail.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2009-11-06net: check kern before calling security subsystemEric Paris
Before calling capable(CAP_NET_RAW) check if this operations is on behalf of the kernel or on behalf of userspace. Do not do the security check if it is on behalf of the kernel. Signed-off-by: Eric Paris <eparis@redhat.com> Acked-by: Arnaldo Carvalho de Melo <acme@redhat.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2009-11-06net: pass kern to net_proto_family create functionEric Paris
The generic __sock_create function has a kern argument which allows the security system to make decisions based on if a socket is being created by the kernel or by userspace. This patch passes that flag to the net_proto_family specific create function, so it can do the same thing. Signed-off-by: Eric Paris <eparis@redhat.com> Acked-by: Arnaldo Carvalho de Melo <acme@redhat.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2009-11-06net: drop capability from protocol definitionsEric Paris
struct can_proto had a capability field which wasn't ever used. It is dropped entirely. struct inet_protosw had a capability field which can be more clearly expressed in the code by just checking if sock->type = SOCK_RAW. Signed-off-by: Eric Paris <eparis@redhat.com> Acked-by: Arnaldo Carvalho de Melo <acme@redhat.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2009-11-04net: Introduce for_each_netdev_rcu() iteratorEric Dumazet
Adds RCU management to the list of netdevices. Convert some for_each_netdev() users to RCU version, if it can avoid read_lock-ing dev_base_lock Ie: read_lock(&dev_base_loack); for_each_netdev(net, dev) some_action(); read_unlock(&dev_base_lock); becomes : rcu_read_lock(); for_each_netdev_rcu(net, dev) some_action(); rcu_read_unlock(); Signed-off-by: Eric Dumazet <eric.dumazet@gmail.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2009-11-02ipv6: no more dev_put() in datagram_send_ctl()Eric Dumazet
Avoids touching device refcount in datagram_send_ctl(), thanks to RCU Signed-off-by: Eric Dumazet <eric.dumazet@gmail.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2009-11-02ipv6: no more dev_put() in inet6_bind()Eric Dumazet
Avoids touching device refcount in inet6_bind(), thanks to RCU Signed-off-by: Eric Dumazet <eric.dumazet@gmail.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2009-11-02ip6tnl: less dev_put() callsEric Dumazet
Using dev_get_by_index_rcu() in ip6_tnl_rcv_ctl() & ip6_tnl_xmit_ctl() avoids touching device refcount. Signed-off-by: Eric Dumazet <eric.dumazet@gmail.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2009-10-30net: fix sk_forward_alloc corruptionEric Dumazet
On UDP sockets, we must call skb_free_datagram() with socket locked, or risk sk_forward_alloc corruption. This requirement is not respected in SUNRPC. Add a convenient helper, skb_free_datagram_locked() and use it in SUNRPC Reported-by: Francis Moreau <francis.moro@gmail.com> Signed-off-by: Eric Dumazet <eric.dumazet@gmail.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2009-10-29Allow tcp_parse_options to consult dst entryGilad Ben-Yossef
We need tcp_parse_options to be aware of dst_entry to take into account per dst_entry TCP options settings Signed-off-by: Gilad Ben-Yossef <gilad@codefidence.com> Sigend-off-by: Ori Finkelman <ori@comsleep.com> Sigend-off-by: Yony Amit <yony@comsleep.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2009-10-29ip6mr: Optimize multiple unregistrationEric Dumazet
Speedup module unloading by factorizing synchronize_rcu() calls Signed-off-by: Eric Dumazet <eric.dumazet@gmail.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2009-10-29ipv6 sit: Optimize multiple unregistrationEric Dumazet
Speedup module unloading by factorizing synchronize_rcu() calls Signed-off-by: Eric Dumazet <eric.dumazet@gmail.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2009-10-29ip6tnl: Optimize multiple unregistrationEric Dumazet
Speedup module unloading by factorizing synchronize_rcu() calls Signed-off-by: Eric Dumazet <eric.dumazet@gmail.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2009-10-27Merge branch 'master' of ↵David S. Miller
master.kernel.org:/pub/scm/linux/kernel/git/davem/net-2.6 Conflicts: drivers/net/sh_eth.c
2009-10-24ip6tnl: convert hash tables locking to RCUEric Dumazet
ip6_tunnels use one rwlock to protect their hash tables. This locking scheme can be converted to RCU for free, since netdevice already must wait for a RCU grace period at dismantle time. Signed-off-by: Eric Dumazet <eric.dumazet@gmail.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2009-10-24xfrm6_tunnel: RCU conversionEric Dumazet
xfrm6_tunnels use one rwlock to protect their hash tables. Plain and straightforward conversion to RCU locking to permit better SMP performance. Signed-off-by: Eric Dumazet <eric.dumazet@gmail.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2009-10-24ipv6 sit: RCU conversion phase IIEric Dumazet
SIT tunnels use one rwlock to protect their hash tables. This locking scheme can be converted to RCU for free, since netdevice already must wait for a RCU grace period at dismantle time. Signed-off-by: Eric Dumazet <eric.dumazet@gmail.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2009-10-24ipv6 sit: RCU conversion phase IEric Dumazet
SIT tunnels use one rwlock to protect their prl entries. This first patch adds RCU locking for prl management, with standard call_rcu() calls. Signed-off-by: Eric Dumazet <eric.dumazet@gmail.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2009-10-21net: IPv6 changesKrishna Kumar
IPv6: Reset sk_tx_queue_mapping when dst_cache is reset. Use existing macro to do the work. Signed-off-by: Krishna Kumar <krkumar2@in.ibm.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2009-10-20IP: CleanupsJohn Dykstra
Use symbols instead of magic constants while checking PMTU discovery setsockopt. Remove redundant test in ip_rt_frag_needed() (done by caller). Signed-off-by: John Dykstra <john.dykstra1@gmail.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2009-10-20net: Fix IP_MULTICAST_IFEric Dumazet
ipv4/ipv6 setsockopt(IP_MULTICAST_IF) have dubious __dev_get_by_index() calls. This function should be called only with RTNL or dev_base_lock held, or reader could see a corrupt hash chain and eventually enter an endless loop. Fix is to call dev_get_by_index()/dev_put(). If this happens to be performance critical, we could define a new dev_exist_by_index() function to avoid touching dev refcount. Signed-off-by: Eric Dumazet <eric.dumazet@gmail.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2009-10-19ah6: convert to ahashSteffen Klassert
This patch converts ah6 to the new ahash interface. Signed-off-by: Steffen Klassert <steffen.klassert@secunet.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2009-10-19net: sk_drops consolidation part 2Eric Dumazet
- skb_kill_datagram() can increment sk->sk_drops itself, not callers. - UDP on IPV4 & IPV6 dropped frames (because of bad checksum or policy checks) increment sk_drops Signed-off-by: Eric Dumazet <eric.dumazet@gmail.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2009-10-19inet: rename some inet_sock fieldsEric Dumazet
In order to have better cache layouts of struct sock (separate zones for rx/tx paths), we need this preliminary patch. Goal is to transfert fields used at lookup time in the first read-mostly cache line (inside struct sock_common) and move sk_refcnt to a separate cache line (only written by rx path) This patch adds inet_ prefix to daddr, rcv_saddr, dport, num, saddr, sport and id fields. This allows a future patch to define these fields as macros, like sk_refcnt, without name clashes. Signed-off-by: Eric Dumazet <eric.dumazet@gmail.com> Signed-off-by: David S. Miller <davem@davemloft.net>
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