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* tc: add meta match on receive hashStephen Hemminger2010-08-241-0/+6
| | | | | | | | Trivial extension to existing meta data match rules to allow matching on skb receive hash value. Signed-off-by: Stephen Hemminger <shemminger@vyatta.com> Signed-off-by: David S. Miller <davem@davemloft.net>
* net: ip_append_data() optimEric Dumazet2010-08-241-4/+3
| | | | | | | Compiler is not smart enough to avoid a conditional branch. Signed-off-by: Eric Dumazet <eric.dumazet@gmail.com> Signed-off-by: David S. Miller <davem@davemloft.net>
* ethtool: allow non-netadmin to query settingsstephen hemminger2010-08-231-0/+1
| | | | | | | | | | | | | | | The SNMP daemon uses ethtool to determine the speed of network interfaces. This fails on Debian (and probably elsewhere) because for security SNMP daemon runs as non-root user (snmp). Note: A similar patch was rejected previously because of a concern about the possibility that on some hardware querying the ethtool settings requires access to the PHY and could slow the machine down. But the security risk of requiring SNMP daemon (and related services) to run as root far out weighs the risk of denial-of-service. Signed-off-by: Stephen Hemminger <shemminger@vyatta.com> Signed-off-by: David S. Miller <davem@davemloft.net>
* net: copy_rtnl_link_stats64() simplificationEric Dumazet2010-08-231-30/+1
| | | | | | | | | No need to use a temporary struct rtnl_link_stats64 variable, just copy the source to skb buffer. Signed-off-by: Eric Dumazet <eric.dumazet@gmail.com> Reviewed-by: Ben Hutchings <bhutchings@solarflare.com> Signed-off-by: David S. Miller <davem@davemloft.net>
* net_sched: act_csum: coding style cleanupChangli Gao2010-08-231-39/+38
| | | | | Signed-off-by: Changli Gao <xiaosuo@gmail.com> Signed-off-by: David S. Miller <davem@davemloft.net>
* pkt_sched: Make act_csum depend upon INET.David S. Miller2010-08-231-1/+1
| | | | | | | It uses ip_send_check() and stuff like that. Reported-by: Randy Dunlap <randy.dunlap@oracle.com> Signed-off-by: David S. Miller <davem@davemloft.net>
* dccp ccid-2: Replace broken RTT estimator with better algorithmGerrit Renker2010-08-232-81/+108
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | The current CCID-2 RTT estimator code is in parts broken and lags behind the suggestions in RFC2988 of using scaled variants for SRTT/RTTVAR. That code is replaced by the present patch, which reuses the Linux TCP RTT estimator code. Further details: ---------------- 1. The minimum RTO of previously one second has been replaced with TCP's, since RFC4341, sec. 5 says that the minimum of 1 sec. (suggested in RFC2988, 2.4) is not necessary. Instead, the TCP_RTO_MIN is used, which agrees with DCCP's concept of a default RTT (RFC 4340, 3.4). 2. The maximum RTO has been set to DCCP_RTO_MAX (64 sec), which agrees with RFC2988, (2.5). 3. De-inlined the function ccid2_new_ack(). 4. Added a FIXME: the RTT is sampled several times per Ack Vector, which will give the wrong estimate. It should be replaced with one sample per Ack. However, at the moment this can not be resolved easily, since - it depends on TX history code (which also needs some work), - the cleanest solution is not to use the `sent' time at all (saves 4 bytes per entry) and use DCCP timestamps / elapsed time to estimated the RTT, which however is non-trivial to get right (but needs to be done). Reasons for reusing the Linux TCP estimator algorithm: ------------------------------------------------------ Some time was spent to find a better alternative, using basic RFC2988 as a first step. Further analysis and experimentation showed that the Linux TCP RTO estimator is superior to a basic RFC2988 implementation. A summary is on http://www.erg.abdn.ac.uk/users/gerrit/dccp/notes/ccid2/rto_estimator/ In addition, this estimator fared well in a recent empirical evaluation: Rewaskar, Sushant, Jasleen Kaur and F. Donelson Smith. A Performance Study of Loss Detection/Recovery in Real-world TCP Implementations. Proceedings of 15th IEEE International Conference on Network Protocols (ICNP-07), 2007. Thus there is significant benefit in reusing the existing TCP code. Signed-off-by: Gerrit Renker <gerrit@erg.abdn.ac.uk> Signed-off-by: David S. Miller <davem@davemloft.net>
* dccp ccid-2: Simplify dec_pipe and rearming of RTO timerGerrit Renker2010-08-231-19/+8
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | This removes the dec_pipe function and improves the way the RTO timer is rearmed when a new acknowledgment comes in. Details and justification for removal: -------------------------------------- 1) The BUG_ON in dec_pipe is never triggered: pipe is only decremented for TX history entries between tail and head, for which it had previously been incremented in tx_packet_sent; and it is not decremented twice for the same entry, since it is - either decremented when a corresponding Ack Vector cell in state 0 or 1 was received (and then ccid2s_acked==1), - or it is decremented when ccid2s_acked==0, as part of the loss detection in tx_packet_recv (and hence it can not have been decremented earlier). 2) Restarting the RTO timer happens for every single entry in each Ack Vector parsed by tx_packet_recv (according to RFC 4340, 11.4 this can happen up to 16192 times per Ack Vector). 3) The RTO timer should not be restarted when all outstanding data has been acknowledged. This is currently done similar to (2), in dec_pipe, when pipe has reached 0. The patch onsolidates the code which rearms the RTO timer, combining the segments from new_ack and dec_pipe. As a result, the code becomes clearer (compare with tcp_rearm_rto()). Signed-off-by: Gerrit Renker <gerrit@erg.abdn.ac.uk> Signed-off-by: David S. Miller <davem@davemloft.net>
* dccp ccid-2: Remove redundant sanity testsGerrit Renker2010-08-231-52/+0
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | This removes the ccid2_hc_tx_check_sanity function: it is redundant. Details: The tx_check_sanity function performs three tests: 1) it checks that the circular TX list is sorted - in ascending order of sequence number (ccid2s_seq) - and time (ccid2s_sent), - in the direction from `tail' (hctx_seqt) to `head' (hctx_seqh); 2) it ensures that the entire list has the length seqbufc * CCID2_SEQBUF_LEN; 3) it ensures that pipe equals the number of packets that were not marked `acked' (ccid2s_acked) between `tail' and `head'. The following argues that each of these tests is redundant, this can be verified by going through the code. (1) is not necessary, since both time and GSS increase from one packet to the next, so that subsequent insertions in tx_packet_sent (which advance the `head' pointer) will be in ascending order of time and sequence number. In (2), the length of the list is always equal to seqbufc times CCID2_SEQBUF_LEN (set to 1024) unless allocation caused an earlier failure, because: * at initialisation (tx_init), there is one chunk of size 1024 and seqbufc=1; * subsequent calls to tx_alloc_seq take place whenever head->next == tail in tx_packet_sent; then a new chunk of size 1024 is inserted between head and tail, and seqbufc is incremented by one. To show that (3) is redundant requires looking at two cases. The `pipe' variable of the TX socket is incremented only in tx_packet_sent, and decremented in tx_packet_recv. When head == tail (TX history empty) then pipe should be 0, which is the case directly after initialisation and after a retransmission timeout has occurred (ccid2_hc_tx_rto_expire). The first case involves parsing Ack Vectors for packets recorded in the live portion of the buffer, between tail and head. For each packet marked by the receiver as received (state 0) or ECN-marked (state 1), pipe is decremented by one, so for all such packets the BUG_ON in tx_check_sanity will not trigger. The second case is the loss detection in the second half of tx_packet_recv, below the comment "Check for NUMDUPACK". The first while-loop here ensures that the sequence number of `seqp' is either above or equal to `high_ack', or otherwise equal to the highest sequence number sent so far (of the entry head->prev, as head points to the next unsent entry). The next while-loop ("while (1)") counts the number of acked packets starting from that position of seqp, going backwards in the direction from head->prev to tail. If NUMDUPACK=3 such packets were counted within this loop, `seqp' points to the last acknowledged packet of these, and the "if (done == NUMDUPACK)" block is entered next. The while-loop contained within that block in turn traverses the list backwards, from head to tail; the position of `seqp' is saved in the variable `last_acked'. For each packet not marked as `acked', a congestion event is triggered within the loop, and pipe is decremented. The loop terminates when `seqp' has reached `tail', whereupon tail is set to the position previously stored in `last_acked'. Thus, between `last_acked' and the previous position of `tail', - pipe has been decremented earlier if the packet was marked as state 0 or 1; - pipe was decremented if the packet was not marked as acked. That is, pipe has been decremented by the number of packets between `last_acked' and the previous position of `tail'. As a consequence, pipe now again reflects the number of packets which have not (yet) been acked between the new position of tail (at `last_acked') and head->prev, or 0 if head==tail. The result is that the BUG_ON condition in check_sanity will also not be triggered, hence the test (3) is also redundant. Signed-off-by: Gerrit Renker <gerrit@erg.abdn.ac.uk> Signed-off-by: David S. Miller <davem@davemloft.net>
* dccp ccid-3: No more CCID control blocks in LISTEN stateGerrit Renker2010-08-231-33/+7
| | | | | | | | | | | | | | | | | | | | | | | | The CCIDs are activated as last of the features, at the end of the handshake, were the LISTEN state of the master socket is inherited into the server state of the child socket. Thus, the only states visible to CCIDs now are OPEN/PARTOPEN, and the closing states. This allows to remove tests which were previously necessary to protect against referencing a socket in the listening state (in CCID-3), but which now have become redundant. As a further byproduct of enabling the CCIDs only after the connection has been fully established, several typecast-initialisations of ccid3_hc_{rx,tx}_sock can now be eliminated: * the CCID is loaded, so it is not necessary to test if it is NULL, * if it is possible to load a CCID and leave the private area NULL, then this is a bug, which should crash loudly - and earlier, * the test for state==OPEN || state==PARTOPEN now reduces only to the closing phase (e.g. when the node has received an unexpected Reset). Signed-off-by: Gerrit Renker <gerrit@erg.abdn.ac.uk> Acked-by: Ian McDonald <ian.mcdonald@jandi.co.nz> Signed-off-by: David S. Miller <davem@davemloft.net>
* ccid: ccid-2/3 code cosmeticsGerrit Renker2010-08-233-26/+27
| | | | | | | | | | | | | | | This patch collects cosmetics-only changes to separate these from code changes: * update with regard to CodingStyle and whitespace changes, * documentation: - adding/revising comments, - remove CCID-3 RX socket documentation which is either duplicate or refers to fields that no longer exist, * expand embedded tfrc_tx_info struct inline for consistency, removing indirections via #define. Signed-off-by: Gerrit Renker <gerrit@erg.abdn.ac.uk> Signed-off-by: David S. Miller <davem@davemloft.net>
* net: Rename skb_has_frags to skb_has_frag_listDavid S. Miller2010-08-237-16/+16
| | | | | | | | | | | SKBs can be "fragmented" in two ways, via a page array (called skb_shinfo(skb)->frags[]) and via a list of SKBs (called skb_shinfo(skb)->frag_list). Since skb_has_frags() tests the latter, it's name is confusing since it sounds more like it's testing the former. Signed-off-by: David S. Miller <davem@davemloft.net>
* tcp: allow effective reduction of TCP's rcv-buffer via setsockoptHagen Paul Pfeifer2010-08-221-0/+11
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Via setsockopt it is possible to reduce the socket RX buffer (SO_RCVBUF). TCP method to select the initial window and window scaling option in tcp_select_initial_window() currently misbehaves and do not consider a reduced RX socket buffer via setsockopt. Even though the server's RX buffer is reduced via setsockopt() to 256 byte (Initial Window 384 byte => 256 * 2 - (256 * 2 / 4)) the window scale option is still 7: 192.168.1.38.40676 > 78.47.222.210.5001: Flags [S], seq 2577214362, win 5840, options [mss 1460,sackOK,TS val 338417 ecr 0,nop,wscale 0], length 0 78.47.222.210.5001 > 192.168.1.38.40676: Flags [S.], seq 1570631029, ack 2577214363, win 384, options [mss 1452,sackOK,TS val 2435248895 ecr 338417,nop,wscale 7], length 0 192.168.1.38.40676 > 78.47.222.210.5001: Flags [.], ack 1, win 5840, options [nop,nop,TS val 338421 ecr 2435248895], length 0 Within tcp_select_initial_window() the original space argument - a representation of the rx buffer size - is expanded during tcp_select_initial_window(). Only sysctl_tcp_rmem[2], sysctl_rmem_max and window_clamp are considered to calculate the initial window. This patch adjust the window_clamp argument if the user explicitly reduce the receive buffer. Signed-off-by: Hagen Paul Pfeifer <hagen@jauu.net> Cc: David S. Miller <davem@davemloft.net> Cc: Patrick McHardy <kaber@trash.net> Cc: Eric Dumazet <eric.dumazet@gmail.com> Cc: Ilpo Järvinen <ilpo.jarvinen@helsinki.fi> Signed-off-by: David S. Miller <davem@davemloft.net>
* bridge: is PACKET_LOOPBACK unlikely()?Simon Horman2010-08-221-1/+1
| | | | | | | | | | While looking at using netdev_rx_handler_register for openvswitch Jesse Gross suggested that an unlikely() might be worthwhile in that code. I'm interested to see if its appropriate for the bridge code. Cc: Jesse Gross <jesse@nicira.com> Signed-off-by: Simon Horman <horms@verge.net.au> Signed-off-by: David S. Miller <davem@davemloft.net>
* net: 802.1q: make vlan_hwaccel_do_receive() return voidChangli Gao2010-08-222-4/+3
| | | | | | | vlan_hwaccel_do_receive() always returns 0, so make it return void. Signed-off-by: Changli Gao <xiaosuo@gmail.com> Signed-off-by: David S. Miller <davem@davemloft.net>
* net/sched: need to include net/ip6_checksum.hStephen Rothwell2010-08-221-0/+1
| | | | | | | | | | | | for the declararion of csum_ipv6_magic. Fixes this build error on PowerPC (at least): net/sched/act_csum.c: In function 'tcf_csum_ipv6_icmp': net/sched/act_csum.c:178: error: implicit declaration of function 'csum_ipv6_magic' Signed-off-by: Stephen Rothwell <sfr@canb.auug.org.au> Signed-off-by: David S. Miller <davem@davemloft.net>
* net_sched: cls_flow: add key rxhashChangli Gao2010-08-211-0/+7
| | | | | | | | | We can use rxhash to classify the traffic into flows. As rxhash maybe supplied by NIC or RPS, it is cheaper. Signed-off-by: Changli Gao <xiaosuo@gmail.com> Acked-by: Jamal Hadi Salim <hadi@cyberus.ca> Signed-off-by: David S. Miller <davem@davemloft.net>
* irda: use net_device_stats from struct net_deviceEric Dumazet2010-08-211-23/+9
| | | | | | | | struct net_device has its own struct net_device_stats member, so use this one instead of a private copy in the irlan_cb struct. Signed-off-by: Eric Dumazet <eric.dumazet@gmail.com> Signed-off-by: David S. Miller <davem@davemloft.net>
* Merge branch 'master' of ↵David S. Miller2010-08-2113-71/+72
|\ | | | | | | master.kernel.org:/pub/scm/linux/kernel/git/davem/net-2.6
| * irda: fix a race in irlan_eth_xmit()Eric Dumazet2010-08-191-1/+3
| | | | | | | | | | | | | | | | | | After skb is queued, its illegal to dereference it. Cache skb->len into a temporary variable. Signed-off-by: Eric Dumazet <eric.dumazet@gmail.com> Signed-off-by: David S. Miller <davem@davemloft.net>
| * vlan: Match underlying dev carrier on vlan addPhil Oester2010-08-191-1/+2
| | | | | | | | | | | | | | | | | | | | When adding a new vlan, if the underlying interface has no carrier, then the newly added vlan interface should also have no carrier. At present, this is not true - the newly added vlan is added with carrier up. Fix by checking state of real device. Signed-off-by: Phil Oester <kernel@linuxace.com> Signed-off-by: David S. Miller <davem@davemloft.net>
| * rds: fix a leak of kernel memoryEric Dumazet2010-08-181-1/+1
| | | | | | | | | | | | | | | | | | struct rds_rdma_notify contains a 32 bits hole on 64bit arches, make sure it is zeroed before copying it to user. Signed-off-by: Eric Dumazet <eric.dumazet@gmail.com> CC: Andy Grover <andy.grover@oracle.com> Signed-off-by: David S. Miller <davem@davemloft.net>
| * netlink: fix compat recvmsgJohannes Berg2010-08-181-30/+16
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Since commit 1dacc76d0014a034b8aca14237c127d7c19d7726 Author: Johannes Berg <johannes@sipsolutions.net> Date: Wed Jul 1 11:26:02 2009 +0000 net/compat/wext: send different messages to compat tasks we had a race condition when setting and then restoring frag_list. Eric attempted to fix it, but the fix created even worse problems. However, the original motivation I had when I added the code that turned out to be racy is no longer clear to me, since we only copy up to skb->len to userspace, which doesn't include the frag_list length. As a result, not doing any frag_list clearing and restoring avoids the race condition, while not introducing any other problems. Additionally, while preparing this patch I found that since none of the remaining netlink code is really aware of the frag_list, we need to use the original skb's information for packet information and credentials. This fixes, for example, the group information received by compat tasks. Cc: Eric Dumazet <eric.dumazet@gmail.com> Cc: stable@kernel.org [2.6.31+, for 2.6.35 revert 1235f504aa] Signed-off-by: Johannes Berg <johannes.berg@intel.com> Acked-by: Eric Dumazet <eric.dumazet@gmail.com> Signed-off-by: David S. Miller <davem@davemloft.net>
| * net: Fix a memmove bug in dev_gro_receive()Jarek Poplawski2010-08-171-1/+1
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | >Xin Xiaohui wrote: > I looked into the code dev_gro_receive(), found the code here: > if the frags[0] is pulled to 0, then the page will be released, > and memmove() frags left. > Is that right? I'm not sure if memmove do right or not, but > frags[0].size is never set after memove at least. what I think > a simple way is not to do anything if we found frags[0].size == 0. > The patch is as followed. ... This version of the patch fixes the bug directly in memmove. Reported-by: "Xin, Xiaohui" <xiaohui.xin@intel.com> Signed-off-by: Jarek Poplawski <jarkao2@gmail.com> Signed-off-by: David S. Miller <davem@davemloft.net>
| * net sched: fix some kernel memory leaksEric Dumazet2010-08-175-37/+43
| | | | | | | | | | | | | | | | | | | | We leak at least 32bits of kernel memory to user land in tc dump, because we dont init all fields (capab ?) of the dumped structure. Use C99 initializers so that holes and non explicit fields are zeroed. Signed-off-by: Eric Dumazet <eric.dumazet@gmail.com> Signed-off-by: David S. Miller <davem@davemloft.net>
| * netfilter: {ip,ip6,arp}_tables: avoid lockdep false positiveEric Dumazet2010-08-173-0/+6
| | | | | | | | | | | | | | | | | | | | | | | | | | | | After commit 24b36f019 (netfilter: {ip,ip6,arp}_tables: dont block bottom half more than necessary), lockdep can raise a warning because we attempt to lock a spinlock with BH enabled, while the same lock is usually locked by another cpu in a softirq context. Disable again BH to avoid these lockdep warnings. Reported-by: Linus Torvalds <torvalds@linux-foundation.org> Diagnosed-by: David S. Miller <davem@davemloft.net> Signed-off-by: Eric Dumazet <eric.dumazet@gmail.com> Signed-off-by: David S. Miller <davem@davemloft.net>
* | PPTP: PPP over IPv4 (Point-to-Point Tunneling Protocol)Dmitry Kozlov2010-08-214-7/+166
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | PPP: introduce "pptp" module which implements point-to-point tunneling protocol using pppox framework NET: introduce the "gre" module for demultiplexing GRE packets on version criteria (required to pptp and ip_gre may coexists) NET: ip_gre: update to use the "gre" module This patch introduces then pptp support to the linux kernel which dramatically speeds up pptp vpn connections and decreases cpu usage in comparison of existing user-space implementation (poptop/pptpclient). There is accel-pptp project (https://sourceforge.net/projects/accel-pptp/) to utilize this module, it contains plugin for pppd to use pptp in client-mode and modified pptpd (poptop) to build high-performance pptp NAS. There was many changes from initial submitted patch, most important are: 1. using rcu instead of read-write locks 2. using static bitmap instead of dynamically allocated 3. using vmalloc for memory allocation instead of BITS_PER_LONG + __get_free_pages 4. fixed many coding style issues Thanks to Eric Dumazet. Signed-off-by: Dmitry Kozlov <xeb@mail.ru> Signed-off-by: Eric Dumazet <eric.dumazet@gmail.com> Signed-off-by: David S. Miller <davem@davemloft.net>
* | net: rps: fix the wrong network header pointerChangli Gao2010-08-211-2/+2
| | | | | | | | | | | | | | | | | | | | | | | | | | __skb_get_rxhash() was broken after the commit: commit bfb564e7391340638afe4ad67744a8f3858e7566 Author: Krishna Kumar <krkumar2@in.ibm.com> Date: Wed Aug 4 06:15:52 2010 +0000 core: Factor out flow calculation from get_rps_cpu Signed-off-by: Changli Gao <xiaosuo@gmail.com> Signed-off-by: David S. Miller <davem@davemloft.net>
* | net/sched: add ACT_CSUM action to update packets checksumsGrégoire Baron2010-08-203-0/+606
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | net/sched: add ACT_CSUM action to update packets checksums ACT_CSUM can be called just after ACT_PEDIT in order to re-compute some altered checksums in IPv4 and IPv6 packets. The following checksums are supported by this patch: - IPv4: IPv4 header, ICMP, IGMP, TCP, UDP & UDPLite - IPv6: ICMPv6, TCP, UDP & UDPLite It's possible to request in the same action to update different kind of checksums, if the packets flow mix TCP, UDP and UDPLite, ... An example of usage is done in the associated iproute2 patch. Version 3 changes: - remove useless goto instructions - improve IPv6 hop options decoding Version 2 changes: - coding style correction - remove useless arguments of some functions - use stack in tcf_csum_dump() - add tcf_csum_skb_nextlayer() to factor code Signed-off-by: Gregoire Baron <baronchon@n7mm.org> Acked-by: jamal <hadi@cyberus.ca> Signed-off-by: David S. Miller <davem@davemloft.net>
* | net: build_ehash_secret() and rt_bind_peer() cleanupsEric Dumazet2010-08-202-13/+4
| | | | | | | | | | | | | | | | | | Now cmpxchg() is available on all arches, we can use it in build_ehash_secret() and rt_bind_peer() instead of using spinlocks. Signed-off-by: Eric Dumazet <eric.dumazet@gmail.com> CC: Mathieu Desnoyers <mathieu.desnoyers@polymtl.ca> Signed-off-by: David S. Miller <davem@davemloft.net>
* | net_sched: sch_sfq: use proto_ports_offset() to support AH messageChangli Gao2010-08-191-17/+16
| | | | | | | | | | Signed-off-by: Changli Gao <xiaosuo@gmail.com> Signed-off-by: David S. Miller <davem@davemloft.net>
* | netfilter: xt_hashlimit: use proto_ports_offset() to support AH messageChangli Gao2010-08-191-10/+5
| | | | | | | | | | Signed-off-by: Changli Gao <xiaosuo@gmail.com> Signed-off-by: David S. Miller <davem@davemloft.net>
* | netfilter: ipt_CLUSTERIP: use proto_ports_offset() to support AH messageChangli Gao2010-08-191-16/+15
| | | | | | | | | | Signed-off-by: Changli Gao <xiaosuo@gmail.com> Signed-off-by: David S. Miller <davem@davemloft.net>
* | net_sched: cls_flow: use proto_ports_offset() to support AH messageChangli Gao2010-08-191-29/+38
| | | | | | | | | | Signed-off-by: Changli Gao <xiaosuo@gmail.com> Signed-off-by: David S. Miller <davem@davemloft.net>
* | net: rps: use proto_ports_offset() to handle the AH message correctlyChangli Gao2010-08-191-16/+7
| | | | | | | | | | | | | | The SPI isn't at the beginning of an AH message. Signed-off-by: Changli Gao <xiaosuo@gmail.com> Signed-off-by: David S. Miller <davem@davemloft.net>
* | net: rps: skip fragment when computing rxhashChangli Gao2010-08-191-1/+4
| | | | | | | | | | | | | | | | | | Fragmented IP packets may have no transfer header, so when computing rxhash, we should skip them. Signed-off-by: Changli Gao <xiaosuo@gmail.com> Acked-by: Eric Dumazet <eric.dumazet@gmail.com> Signed-off-by: David S. Miller <davem@davemloft.net>
* | net: rps: reset network header before calling skb_get_rxhash()Changli Gao2010-08-191-0/+1
| | | | | | | | | | | | | | | | | | | | | | | | | | | | skb_get_rxhash() assumes the network header pointer of the skb is set properly after the commit: commit bfb564e7391340638afe4ad67744a8f3858e7566 Author: Krishna Kumar <krkumar2@in.ibm.com> Date: Wed Aug 4 06:15:52 2010 +0000 core: Factor out flow calculation from get_rps_cpu Signed-off-by: Changli Gao <xiaosuo@gmail.com> Signed-off-by: David S. Miller <davem@davemloft.net>
* | atm: remove a net_device_stats clearEric Dumazet2010-08-191-1/+0
| | | | | | | | | | | | | | No need to clear device stats in lec_open() Signed-off-by: Eric Dumazet <eric.dumazet@gmail.com> Signed-off-by: David S. Miller <davem@davemloft.net>
* | net: simplify flags for tx timestampingOliver Hartkopp2010-08-199-21/+20
| | | | | | | | | | | | | | | | | | | | | | | | | | This patch removes the abstraction introduced by the union skb_shared_tx in the shared skb data. The access of the different union elements at several places led to some confusion about accessing the shared tx_flags e.g. in skb_orphan_try(). http://marc.info/?l=linux-netdev&m=128084897415886&w=2 Signed-off-by: Oliver Hartkopp <socketcan@hartkopp.net> Signed-off-by: David S. Miller <davem@davemloft.net>
* | net/ax25: Use available error codesJulia Lawall2010-08-181-1/+1
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Error codes are stored in err, but the return value is always 0. Return err instead. The semantic match that finds this problem is as follows: (http://coccinelle.lip6.fr/) // <smpl> @r@ local idexpression x; constant C; @@ if (...) { ... x = -C ... when != x ( return <+...x...+>; | return NULL; | return; | * return ...; ) } // </smpl> Signed-off-by: Julia Lawall <julia@diku.dk> Acked-by: Ralf Baechle <ralf@linux-mips.org> Signed-off-by: David S. Miller <davem@davemloft.net>
* | net/ax25: Use available error codesJulia Lawall2010-08-181-2/+2
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Error codes are stored in err, but the return value is always 0. Return err instead. The semantic match that finds this problem is as follows: (http://coccinelle.lip6.fr/) // <smpl> @r@ local idexpression x; constant C; @@ if (...) { ... x = -C ... when != x ( return <+...x...+>; | return NULL; | return; | * return ...; ) } // </smpl> Signed-off-by: Julia Lawall <julia@diku.dk> Acked-by: Ralf Baechle <ralf@linux-mips.org> Signed-off-by: David S. Miller <davem@davemloft.net>
* | net/sched: remove unneeded NULL checkDan Carpenter2010-08-181-1/+1
| | | | | | | | | | | | | | | | | | There is no need to check "s". nla_data() doesn't return NULL. Also we already dereferenced "s" at this point so it would have oopsed ealier if it were NULL. Signed-off-by: Dan Carpenter <error27@gmail.com> Signed-off-by: David S. Miller <davem@davemloft.net>
* | tipc: Prevent missing name table entries when link flip-flops rapidlyAllan Stephens2010-08-174-1/+39
| | | | | | | | | | | | | | | | | | | | | | | | | | | | Ensure that TIPC does not re-establish communication with a neighboring node until it has finished updating all data structures containing information about that node to reflect the earlier loss of contact. Previously, it was possible for TIPC to perform its purge of name table entries relating to the node once contact had already been re-established, resulting in the unwanted removal of valid name table entries. Signed-off-by: Allan Stephens <allan.stephens@windriver.com> Signed-off-by: Paul Gortmaker <paul.gortmaker@windriver.com> Signed-off-by: David S. Miller <davem@davemloft.net>
* | tipc: Allow connect() to wait indefinitelyAllan Stephens2010-08-171-4/+7
| | | | | | | | | | | | | | | | | | | | | | | | Cause a socket whose TIPC_CONN_TIMEOUT option is zero to wait indefinitely for a response to a connection request using connect(). Previously, specifying a timeout of 0 ms resulted in an immediate timeout, which was inconsistent with the behavior specified by Posix for a socket's receive and send timeout. Signed-off-by: Allan Stephens <allan.stephens@windriver.com> Signed-off-by: Paul Gortmaker <paul.gortmaker@windriver.com> Signed-off-by: David S. Miller <davem@davemloft.net>
* | tipc: Minor enhancements to name table display formatAllan Stephens2010-08-171-28/+16
| | | | | | | | | | | | | | | | | | | | | | Eliminate printing of dashes after name table column headers (to adhere more closely to the standard format used in tipc-config), and simplify name table display logic using array lookups rather than if-then-else logic. Signed-off-by: Allan Stephens <allan.stephens@windriver.com> Signed-off-by: Paul Gortmaker <paul.gortmaker@windriver.com> Signed-off-by: David S. Miller <davem@davemloft.net>
* | tipc: Optimize tipc_node_has_active_links()Allan Stephens2010-08-171-2/+1
| | | | | | | | | | | | | | | | | | Eliminate unnecessary checking for null node pointer and redundant check of second active link array entry. Signed-off-by: Allan Stephens <allan.stephens@windriver.com> Signed-off-by: Paul Gortmaker <paul.gortmaker@windriver.com> Signed-off-by: David S. Miller <davem@davemloft.net>
* | tipc: Remove per-connection sequence number logicAllan Stephens2010-08-171-12/+3
| | | | | | | | | | | | | | | | | | Remove validation of the per-connection sequence numbers on routable connections, since routable connections are not supported by TIPC. Signed-off-by: Allan Stephens <allan.stephens@windriver.com> Signed-off-by: Paul Gortmaker <paul.gortmaker@windriver.com> Signed-off-by: David S. Miller <davem@davemloft.net>
* | tipc: Fix bug in broadcast link transmit statistics computationAllan Stephens2010-08-171-3/+2
| | | | | | | | | | | | | | | | | | | | | | | | | | Modify TIPC's broadcast link so that it counts each piece of a fragmented message individually, rather than as treating the group as a single message. This ensures that proper correlation of sent and received traffic can be done when the broadcast link statistics are displayed, and is consistent with the way fragments are counted by TIPC's unicast links. Signed-off-by: Allan Stephens <allan.stephens@windriver.com> Signed-off-by: Paul Gortmaker <paul.gortmaker@windriver.com> Signed-off-by: David S. Miller <davem@davemloft.net>
* | tipc: Fix premature broadcast advertisement by sending nodeAllan Stephens2010-08-171-11/+19
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Prevent a TIPC node from sending out a LINK_STATE message advertising a broadcast message that it is in the process of sending, but has not yet actually sent. Previously, it was possible for a link timeout to occur in between the time the broadcast link updated its "last message sent" counter and the time the broadcast message was passed to the broadcast bearer for transmission. This ensures that the code which issues the LINK_STATE message isn't informed of the new message until the broadcast bearer has had a chance to send it. Note: The "last message sent" value is stored in the "fsm_msg_count" field of the link structure used by the broadcast link. Since the broadcast link doesn't utilize the normal link FSM, this field can be re-used rather than adding a new field to the broadcast link. Signed-off-by: Allan Stephens <allan.stephens@windriver.com> Signed-off-by: Paul Gortmaker <paul.gortmaker@windriver.com> Signed-off-by: David S. Miller <davem@davemloft.net>
* | tipc: Prevent crash when broadcast link cannot send to all nodesAllan Stephens2010-08-171-4/+6
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Allow TIPC's broadcast link to continue operation when it is unable to send a message to all nodes in the cluster. Previously, the broadcast link attempted to put the broadcast pseudo-bearer into a blocked state; however, this caused a crash because the associated bearer structure is only partially initialized. Further investigation has revealed some conceptual problems with blocking the pseudo-bearer; consequently, this functionality has been disabled for the time being and the undelivered message is eventually resent by the broadcast link's existing message retransmission mechanism (if possible). Signed-off-by: Allan Stephens <allan.stephens@windriver.com> Signed-off-by: Paul Gortmaker <paul.gortmaker@windriver.com> Signed-off-by: David S. Miller <davem@davemloft.net>
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