- 15 Aug, 2012 14 commits
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Eric W. Biederman authored
There are a handle of state machine functions primarily those dealing with processing INIT packets where there is neither a valid endpoint nor a valid assoication from which to derive a struct net. Therefore add struct net * to the parameter list of sctp_state_fn_t and update all of the state machine functions. Signed-off-by: "Eric W. Biederman" <ebiederm@xmission.com> Signed-off-by: David S. Miller <davem@davemloft.net>
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Eric W. Biederman authored
struct net will be needed shortly when the tunables are made per network namespace. Signed-off-by: "Eric W. Biederman" <ebiederm@xmission.com> Signed-off-by: David S. Miller <davem@davemloft.net>
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Eric W. Biederman authored
Signed-off-by: "Eric W. Biederman" <ebiederm@xmission.com> Signed-off-by: David S. Miller <davem@davemloft.net>
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Eric W. Biederman authored
This trickles up through sctp_sm_lookup_event up to sctp_do_sm and up further into sctp_primitiv_NAME before the code reaches places where struct net can be reliably found. Signed-off-by: "Eric W. Biederman" <ebiederm@xmission.com> Signed-off-by: David S. Miller <davem@davemloft.net>
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Eric W. Biederman authored
Start with an empty sctp_net_table that will be populated as the various tunable sysctls are made per net. Signed-off-by: "Eric W. Biederman" <ebiederm@xmission.com> Acked-by: Vlad Yasevich <vyasevich@gmail.com> Signed-off-by: David S. Miller <davem@davemloft.net>
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Eric W. Biederman authored
Signed-off-by: "Eric W. Biederman" <ebiederm@xmission.com> Acked-by: Vlad Yasevich <vyasevich@gmail.com> Signed-off-by: David S. Miller <davem@davemloft.net>
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Eric W. Biederman authored
- Fix the sctp_af operations to work in all namespaces - Enable sctp socket creation in all network namespaces. Signed-off-by: "Eric W. Biederman" <ebiederm@xmission.com> Acked-by: Vlad Yasevich <vyasevich@gmail.com> Signed-off-by: David S. Miller <davem@davemloft.net>
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Eric W. Biederman authored
- Convert all of the files under /proc/net/sctp to be per network namespace. - Don't print anything for /proc/net/sctp/snmp except in the initial network namespaces as the snmp counters still have to be converted to be per network namespace. Signed-off-by: "Eric W. Biederman" <ebiederm@xmission.com> Acked-by: Vlad Yasevich <vyasevich@gmail.com> Signed-off-by: David S. Miller <davem@davemloft.net>
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Eric W. Biederman authored
The percpu sctp socket counter has nothing at all to do with the sctp proc files, and having it in the wrong initialization is confusing, and makes network namespace support a pain. Signed-off-by: "Eric W. Biederman" <ebiederm@xmission.com> Acked-by: Vlad Yasevich <vyasevich@gmail.com> Signed-off-by: David S. Miller <davem@davemloft.net>
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Eric W. Biederman authored
- Kill sctp_get_ctl_sock, it is useless now. - Pass struct net where needed so net->sctp.ctl_sock is accessible. Signed-off-by: "Eric W. Biederman" <ebiederm@xmission.com> Acked-by: Vlad Yasevich <vyasevich@gmail.com> Signed-off-by: David S. Miller <davem@davemloft.net>
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Eric W. Biederman authored
- Move the address lists into struct net - Add per network namespace initialization and cleanup - Pass around struct net so it is everywhere I need it. - Rename all of the global variable references into references to the variables moved into struct net Signed-off-by: "Eric W. Biederman" <ebiederm@xmission.com> Acked-by: Vlad Yasevich <vyasevich@gmail.com> Signed-off-by: David S. Miller <davem@davemloft.net>
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Eric W. Biederman authored
- Use struct net in the hash calculation - Use sock_net(association.base.sk) in the association lookups. - On receive calculate the network namespace from skb->dev. - Pass struct net from receive down to the functions that actually do the association lookup. Signed-off-by: "Eric W. Biederman" <ebiederm@xmission.com> Acked-by: Vlad Yasevich <vyasevich@gmail.com> Signed-off-by: David S. Miller <davem@davemloft.net>
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Eric W. Biederman authored
- Use struct net in the hash calculation - Use sock_net(endpoint.base.sk) in the endpoint lookups. - On receive calculate the network namespace from skb->dev. Signed-off-by: "Eric W. Biederman" <ebiederm@xmission.com> Acked-by: Vlad Yasevich <vyasevich@gmail.com> Signed-off-by: David S. Miller <davem@davemloft.net>
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Eric W. Biederman authored
- Add struct net into the port hash table hash calculation - Add struct net inot the struct sctp_bind_bucket so there is a memory of which network namespace a port is allocated in. No need for a ref count because sctp_bind_bucket only exists when there are sockets in the hash table and sockets can not change their network namspace, and sockets already ref count their network namespace. - Add struct net into the key comparison when we are testing to see if we have found the port hash table entry we are looking for. With these changes lookups in the port hash table becomes safe to use in multiple network namespaces. Signed-off-by: "Eric W. Biederman" <ebiederm@xmission.com> Acked-by: Vlad Yasevich <vyasevich@gmail.com> Signed-off-by: David S. Miller <davem@davemloft.net>
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- 14 Aug, 2012 9 commits
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Pavel Emelyanov authored
The info is reported as an array of packet_diag_mclist structures. Each includes not only the directly configured values (index, type, etc), but also the "count". Signed-off-by: Pavel Emelyanov <xemul@parallels.com> Signed-off-by: David S. Miller <davem@davemloft.net>
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Pavel Emelyanov authored
This reports in one rtattr message all the other scalar values, that can be set on a packet socket with setsockopt. Signed-off-by: Pavel Emelyanov <xemul@parallels.com> Signed-off-by: David S. Miller <davem@davemloft.net>
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Pavel Emelyanov authored
The diag module can be built independently from the af_packet.ko one, just like it's done in unix sockets. The core dumping message carries the info available at socket creation time, i.e. family, type and protocol (in the same byte order as shown in the proc file). The socket inode number and cookie is reserved for future per-socket info retrieving. The per-protocol filtering is also reserved for future by requiring the sdiag_protocol to be zero. Signed-off-by: Pavel Emelyanov <xemul@parallels.com> Signed-off-by: David S. Miller <davem@davemloft.net>
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Pavel Emelyanov authored
The diag module will need to access some private packet_sock data, so move it to a header in advance. This file will be shared between the af_packet.c and the diag.c Signed-off-by: Pavel Emelyanov <xemul@parallels.com> Signed-off-by: David S. Miller <davem@davemloft.net>
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Igor Maravic authored
We've already found leaf, don't search for it again. Same is for fib leaf info. Signed-off-by: Igor Maravic <igorm@etf.rs> Signed-off-by: David S. Miller <davem@davemloft.net>
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Priyanka Jain authored
xfrm_policy_afinfo is read mosly data structure. Write on xfrm_policy_afinfo is done only at the time of configuration. So rwlocks can be safely replaced with RCU. RCUs usage optimizes the performance. Signed-off-by: Priyanka Jain <Priyanka.Jain@freescale.com> Signed-off-by: David S. Miller <davem@davemloft.net>
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xeb@mail.ru authored
GRE over IPv6 implementation. Signed-off-by: Dmitry Kozlov <xeb@mail.ru> Signed-off-by: David S. Miller <davem@davemloft.net>
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Amerigo Wang authored
I don't see any benifits to use netdev_bonding_change() than using call_netdevice_notifiers() directly. Cc: David S. Miller <davem@davemloft.net> Signed-off-by: Cong Wang <amwang@redhat.com> Signed-off-by: David S. Miller <davem@davemloft.net>
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Amerigo Wang authored
I believe net/core/dev.c is a better place for netif_notify_peers(), because other net event notify functions also stay in this file. And rename it to netdev_notify_peers(). Cc: David S. Miller <davem@davemloft.net> Cc: Ian Campbell <Ian.Campbell@citrix.com> Signed-off-by: Cong Wang <amwang@redhat.com> Signed-off-by: David S. Miller <davem@davemloft.net>
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- 09 Aug, 2012 7 commits
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Haiyang Zhang authored
Reported-by: Olaf Hering <olaf@aepfle.de> Signed-off-by: Haiyang Zhang <haiyangz@microsoft.com> Signed-off-by: David S. Miller <davem@davemloft.net>
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Pavel Emelyanov authored
As pointed out, there are places, that access net->loopback_dev->ifindex and after ifindex generation is made per-net this value becomes constant equals 1. So go ahead and introduce the LOOPBACK_IFINDEX constant and use it where appropriate. Signed-off-by: Pavel Emelyanov <xemul@parallels.com> Acked-by: Eric Dumazet <edumazet@google.com> Signed-off-by: David S. Miller <davem@davemloft.net>
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Pavel Emelyanov authored
Strictly speaking this is only _really_ required for checkpoint-restore to make loopback device always have the same index. This change appears to be safe wrt "ifindex should be unique per-system" concept, as all the ifindex usage is either already made per net namespace of is explicitly limited with init_net only. There are two cool side effects of this. The first one -- ifindices of devices in container are always small, regardless of how many containers we've started (and re-started) so far. The second one is -- we can speed up the loopback ifidex access as shown in the next patch. v2: Place ifindex right after dev_base_seq : avoid two holes and use the same cache line, dirtied in list_netdevice()/unlist_netdevice() Signed-off-by: Pavel Emelyanov <xemul@parallels.com> Acked-by: Eric Dumazet <edumazet@google.com> Signed-off-by: David S. Miller <davem@davemloft.net>
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Pavel Emelyanov authored
The ifinfomsg is in there (thanks kaber@ for foreseeing this long time ago), so take the given ifidex and register netdev with it. Ben noticed, that this code path previously ignored ifmp->ifi_index and userland could be passing in garbage. Thus it may now fail occasionally because the value clashes with an existing interface. To address this it's assumed that if the caller specifies the ifindex for the veth master device, then it's aware of this possibility and should explicitly specify (or set to 0 for auto-assignment) the peer's ifindex as well. With this the compatibility with old tools not setting ifindex is preserved. Signed-off-by: Pavel Emelyanov <xemul@parallels.com> Signed-off-by: David S. Miller <davem@davemloft.net>
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Pavel Emelyanov authored
Currently the RTM_NEWLINK results in -EOPNOTSUPP if the ifinfomsg->ifi_index is not zero. I propose to allow requesting ifindices on link creation. This is required by the checkpoint-restore to correctly restore a net namespace (i.e. -- a container). Signed-off-by: Pavel Emelyanov <xemul@parallels.com> Acked-by: Eric Dumazet <edumazet@google.com> Signed-off-by: David S. Miller <davem@davemloft.net>
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Pavel Emelyanov authored
Eric noticed, that when there will be devices with equal indices, some hash functions that use them will become less effective as they could. Fix this in advance by mixing the net_device address into the hash value instead of the device index. This is true for arp and ndisc hash fns. The netlabel, can and llc ones are also ifindex-based, but that three are init_net-only, thus will not be affected. Many thanks to David and Eric for the hash32_ptr implementation! Signed-off-by: Pavel Emelyanov <xemul@parallels.com> Signed-off-by: Eric Dumazet <edumazet@google.com> Signed-off-by: David S. Miller <davem@davemloft.net>
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Eric Dumazet authored
Various /proc/net files sometimes report crazy timer values, expressed in clock_t units. This happens when an expired timer delta (expires - jiffies) is passed to jiffies_to_clock_t(). This function has an overflow in : return div_u64((u64)x * TICK_NSEC, NSEC_PER_SEC / USER_HZ); commit cbbc719f (time: Change jiffies_to_clock_t() argument type to unsigned long) only got around the problem. As we cant output negative values in /proc/net/tcp without breaking various tools, I suggest adding a jiffies_delta_to_clock_t() wrapper that caps the negative delta to a 0 value. Signed-off-by: Eric Dumazet <edumazet@google.com> Reported-by: Maciej Żenczykowski <maze@google.com> Cc: Thomas Gleixner <tglx@linutronix.de> Cc: Paul Gortmaker <paul.gortmaker@windriver.com> Cc: Andrew Morton <akpm@linux-foundation.org> Cc: hank <pyu@redhat.com> Signed-off-by: David S. Miller <davem@davemloft.net>
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- 07 Aug, 2012 4 commits
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Eric Dumazet authored
__fls(x) is a bit faster than fls(x), granted we know x is non null. As Ben Hutchings pointed out, fls(x) = __fls(x) + 1 Signed-off-by: Eric Dumazet <edumazet@google.com> Cc: Ben Hutchings <bhutchings@solarflare.com> Signed-off-by: David S. Miller <davem@davemloft.net>
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Eric Dumazet authored
1) Avoid dirtying neighbour's confirmed field. TCP workloads hits this cache line for each incoming ACK. Lets write n->confirmed only if there is a jiffie change. 2) Optimize neigh_hh_output() for the common Ethernet case, were hh_len is less than 16 bytes. Replace the memcpy() call by two inlined 64bit load/stores on x86_64. Bench results using udpflood test, with -C option (MSG_CONFIRM flag added to sendto(), to reproduce the n->confirmed dirtying on UDP) 24 threads doing 1.000.000 UDP sendto() on dummy device, 4 runs. before : 2.247s, 2.235s, 2.247s, 2.318s after : 1.884s, 1.905s, 1.891s, 1.895s Signed-off-by: Eric Dumazet <edumazet@google.com> Signed-off-by: David S. Miller <davem@davemloft.net>
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Mugunthan V N authored
Fixing the cpsw device tree example to make it simpler to copy pastable to dts file and use it directly. Signed-off-by: Mugunthan V N <mugunthanvnm@ti.com> Signed-off-by: David S. Miller <davem@davemloft.net>
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Mugunthan V N authored
device tree implementation for davinci mdio driver Signed-off-by: Mugunthan V N <mugunthanvnm@ti.com> Signed-off-by: David S. Miller <davem@davemloft.net>
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- 06 Aug, 2012 4 commits
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Eric Dumazet authored
While playing with CoDel and ECN marking, I discovered a non optimal behavior of receiver of CE (Congestion Encountered) segments. In pathological cases, sender has reduced its cwnd to low values, and receiver delays its ACK (by 40 ms). While RFC 3168 6.1.3 (The TCP Receiver) doesn't explicitly recommend to send immediate ACKS, we believe its better to not delay ACKS, because a CE segment should give same signal than a dropped segment, and its quite important to reduce RTT to give ECE/CWR signals as fast as possible. Note we already call tcp_enter_quickack_mode() from TCP_ECN_check_ce() if we receive a retransmit, for the same reason. Signed-off-by: Eric Dumazet <edumazet@google.com> Cc: Neal Cardwell <ncardwell@google.com> Acked-by: Neal Cardwell <ncardwell@google.com> Signed-off-by: David S. Miller <davem@davemloft.net>
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Eric Dumazet authored
While doing TCP ECN tests, I discovered GRO was reordering packets if it receives one packet with CE set, while previous packets in same NAPI run have ECT(0) for the same flow : 09:25:25.857620 IP (tos 0x2,ECT(0), ttl 64, id 27893, offset 0, flags [DF], proto TCP (6), length 4396) 172.30.42.19.54550 > 172.30.42.13.44139: Flags [.], seq 233801:238145, ack 1, win 115, options [nop,nop,TS val 3397779 ecr 1990627], length 4344 09:25:25.857626 IP (tos 0x3,CE, ttl 64, id 27892, offset 0, flags [DF], proto TCP (6), length 1500) 172.30.42.19.54550 > 172.30.42.13.44139: Flags [.], seq 232353:233801, ack 1, win 115, options [nop,nop,TS val 3397779 ecr 1990627], length 1448 09:25:25.857638 IP (tos 0x0, ttl 64, id 34581, offset 0, flags [DF], proto TCP (6), length 64) 172.30.42.13.44139 > 172.30.42.19.54550: Flags [.], cksum 0xac8f (incorrect -> 0xca69), ack 232353, win 1271, options [nop,nop,TS val 1990627 ecr 3397779,nop,nop,sack 1 {233801:238145}], length 0 We have two problems here : 1) GRO reorders packets If NIC gave packet1, then packet2, which happen to be from "different flows" GRO feeds stack with packet2, then packet1. I have yet to understand how to solve this problem. 2) GRO is not ECN friendly Delivering packets out of order makes TCP stack not as fast as it could be. In this patch I suggest we make the tos test not part of the 'same_flow' determination, but part of the 'should flush' logic Signed-off-by: Eric Dumazet <edumazet@google.com> Cc: Herbert Xu <herbert@gondor.apana.org.au> Acked-by: Herbert Xu <herbert@gondor.apana.org.au> Signed-off-by: David S. Miller <davem@davemloft.net>
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Eric Dumazet authored
Reduce IP latencies by placing hot MIB IP fields in a single cache line. Signed-off-by: Eric Dumazet <edumazet@google.com> Signed-off-by: David S. Miller <davem@davemloft.net>
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Eric Dumazet authored
Avoid two instructions to reload dev->nd_net->mib.ip_statistics pointer, unsing a temp variable, in ip_rcv(), ip_output() paths for example. Signed-off-by: Eric Dumazet <edumazet@google.com> Signed-off-by: David S. Miller <davem@davemloft.net>
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- 04 Aug, 2012 2 commits
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Eric Dumazet authored
performance profiles show a high cost in the IN_DEV_ROUTE_LOCALNET() call done in ip_route_input_slow(), because of multiple dereferences, even if cache lines are clean and available in cpu caches. Since we already have the 'net' pointer, introduce IN_DEV_NET_ROUTE_LOCALNET() macro avoiding two dereferences (dev_net(in_dev->dev)) Also change the tests to use IN_DEV_NET_ROUTE_LOCALNET() only if saddr or/and daddr are loopback addresse. Signed-off-by: Eric Dumazet <edumazet@google.com> Signed-off-by: David S. Miller <davem@davemloft.net>
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Eric Dumazet authored
Use net_hash_mix(net) instead of hash_ptr(net, 8), and use hash_32() instead of using a serie of XOR Define IN4_ADDR_HSIZE_SHIFT for clarity __ip_dev_find() can perform the net_eq() call only if ifa_local matches the key, to avoid unneeded dereferences. remove inline attributes # size net/ipv4/devinet.o.before net/ipv4/devinet.o text data bss dec hex filename 17471 2545 2048 22064 5630 net/ipv4/devinet.o.before 17335 2545 2048 21928 55a8 net/ipv4/devinet.o Signed-off-by: Eric Dumazet <edumazet@google.com> Signed-off-by: David S. Miller <davem@davemloft.net>
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