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2010-07-02Merge branch 'master' of ↵David S. Miller1-28/+53
git://git.kernel.org/pub/scm/linux/kernel/git/kaber/nf-next-2.6
2010-06-30fragment: add fast path for in-order fragmentsChangli Gao1-0/+11
add fast path for in-order fragments As the fragments are sent in order in most of OSes, such as Windows, Darwin and FreeBSD, it is likely the new fragments are at the end of the inet_frag_queue. In the fast path, we check if the skb at the end of the inet_frag_queue is the prev we expect. Signed-off-by: Changli Gao <xiaosuo@gmail.com> ---- include/net/inet_frag.h | 1 + net/ipv4/ip_fragment.c | 12 ++++++++++++ net/ipv6/reassembly.c | 11 +++++++++++ 3 files changed, 24 insertions(+) Signed-off-by: David S. Miller <davem@davemloft.net>
2010-06-30snmp: 64bit ipstats_mib for all archesEric Dumazet2-4/+31
/proc/net/snmp and /proc/net/netstat expose SNMP counters. Width of these counters is either 32 or 64 bits, depending on the size of "unsigned long" in kernel. This means user program parsing these files must already be prepared to deal with 64bit values, regardless of user program being 32 or 64 bit. This patch introduces 64bit snmp values for IPSTAT mib, where some counters can wrap pretty fast if they are 32bit wide. # netstat -s|egrep "InOctets|OutOctets" InOctets: 244068329096 OutOctets: 244069348848 Signed-off-by: Eric Dumazet <eric.dumazet@gmail.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2010-06-30ipv6: Use interface max_desync_factor instead of static defaultBen Hutchings1-4/+4
max_desync_factor can be configured per-interface, but nothing is using the value. Reported-by: Piotr Lewandowski <piotr.lewandowski@gmail.com> Signed-off-by: Ben Hutchings <ben@decadent.org.uk> Signed-off-by: David S. Miller <davem@davemloft.net>
2010-06-30ipv6: Clamp reported valid_lft to a minimum of 0Ben Hutchings1-2/+6
Since addresses are only revalidated every 2 minutes, the reported valid_lft can underflow shortly before the address is deleted. Clamp it to a minimum of 0, as for prefered_lft. Reported-by: Piotr Lewandowski <piotr.lewandowski@gmail.com> Signed-off-by: Ben Hutchings <ben@decadent.org.uk> Signed-off-by: David S. Miller <davem@davemloft.net>
2010-06-28netfilter: ipt_LOG/ip6t_LOG: add option to print decoded MAC headerPatrick McHardy1-28/+53
The LOG targets print the entire MAC header as one long string, which is not readable very well: IN=eth0 OUT= MAC=00:15:f2:24:91:f8:00:1b:24:dc:61:e6:08:00 ... Add an option to decode known header formats (currently just ARPHRD_ETHER devices) in their individual fields: IN=eth0 OUT= MACSRC=00:1b:24:dc:61:e6 MACDST=00:15:f2:24:91:f8 MACPROTO=0800 ... IN=eth0 OUT= MACSRC=00:1b:24:dc:61:e6 MACDST=00:15:f2:24:91:f8 MACPROTO=86dd ... The option needs to be explicitly enabled by userspace to avoid breaking existing parsers. Signed-off-by: Patrick McHardy <kaber@trash.net>
2010-06-28netfilter: ipt_LOG/ip6t_LOG: remove comparison within loopPatrick McHardy1-3/+3
Remove the comparison within the loop to print the macheader by prepending the colon to all but the first printk. Based on suggestion by Jan Engelhardt <jengelh@medozas.de>. Signed-off-by: Patrick McHardy <kaber@trash.net>
2010-06-26syncookies: add support for ECNFlorian Westphal2-3/+4
Allows use of ECN when syncookies are in effect by encoding ecn_ok into the syn-ack tcp timestamp. While at it, remove a uneeded #ifdef CONFIG_SYN_COOKIES. With CONFIG_SYN_COOKIES=nm want_cookie is ifdef'd to 0 and gcc removes the "if (0)". Signed-off-by: Florian Westphal <fw@strlen.de> Signed-off-by: David S. Miller <davem@davemloft.net>
2010-06-26syncookies: do not store rcv_wscale in tcp timestampFlorian Westphal1-1/+0
As pointed out by Fernando Gont there is no need to encode rcv_wscale into the cookie. We did not use the restored rcv_wscale anyway; it is recomputed via tcp_select_initial_window(). Thus we can save 4 bits in the ts option space by removing rcv_wscale. In case window scaling was not supported, we set the (invalid) wscale value 0xf. Signed-off-by: Florian Westphal <fw@strlen.de> Signed-off-by: David S. Miller <davem@davemloft.net>
2010-06-25ipv6: remove ipv6_statisticsEric Dumazet1-2/+0
commit 9261e5370112 (ipv6: making ip and icmp statistics per/namespace) forgot to remove ipv6_statistics variable. commit bc417d99bf27 (ipv6: remove stale MIB definitions) took care of icmpv6_statistics & icmpv6msg_statistics Signed-off-by: Eric Dumazet <eric.dumazet@gmail.com> CC: Denis V. Lunev <den@openvz.org> CC: Alexey Dobriyan <adobriyan@gmail.com> CC: Hideaki YOSHIFUJI <yoshfuji@linux-ipv6.org> Signed-off-by: David S. Miller <davem@davemloft.net>
2010-06-25snmp: add align parameter to snmp_mib_init()Eric Dumazet2-8/+16
In preparation for 64bit snmp counters for some mibs, add an 'align' parameter to snmp_mib_init(), instead of assuming mibs only contain 'unsigned long' fields. Callers can use __alignof__(type) to provide correct alignment. Signed-off-by: Eric Dumazet <eric.dumazet@gmail.com> CC: Herbert Xu <herbert@gondor.apana.org.au> CC: Arnaldo Carvalho de Melo <acme@ghostprotocols.net> CC: Hideaki YOSHIFUJI <yoshfuji@linux-ipv6.org> CC: Vlad Yasevich <vladislav.yasevich@hp.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2010-06-16syncookies: check decoded options against sysctl settingsFlorian Westphal1-2/+2
Discard the ACK if we find options that do not match current sysctl settings. Previously it was possible to create a connection with sack, wscale, etc. enabled even if the feature was disabled via sysctl. Also remove an unneeded call to tcp_sack_reset() in cookie_check_timestamp: Both call sites (cookie_v4_check, cookie_v6_check) zero "struct tcp_options_received", hand it to tcp_parse_options() (which does not change tcp_opt->num_sacks/dsack) and then call cookie_check_timestamp(). Even if num_sacks/dsacks were changed, the structure is allocated on the stack and after cookie_check_timestamp returns only a few selected members are copied to the inet_request_sock. Signed-off-by: Florian Westphal <fw@strlen.de> Signed-off-by: David S. Miller <davem@davemloft.net>
2010-06-15ipfrag : frag_kfree_skb() cleanupEric Dumazet1-5/+2
Third param (work) is unused, remove it. Remove __inline__ and inline qualifiers. Signed-off-by: Eric Dumazet <eric.dumazet@gmail.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2010-06-15ip_frag: Remove some atomic opsEric Dumazet1-2/+1
Instead of doing one atomic operation per frag, we can factorize them. Signed-off-by: Eric Dumazet <eric.dumazet@gmail.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2010-06-15ipv6: syncookies: do not skip ->iif initializationFlorian Westphal1-6/+7
When syncookies are in effect, req->iif is left uninitialized. In case of e.g. link-local addresses the route lookup then fails and no syn-ack is sent. Rearrange things so ->iif is also initialized in the syncookie case. want_cookie can only be true when the isn was zero, thus move the want_cookie check into the "!isn" branch. Cc: Glenn Griffin <ggriffin.kernel@gmail.com> Signed-off-by: Florian Westphal <fw@strlen.de> Signed-off-by: David S. Miller <davem@davemloft.net>
2010-06-15Merge branch 'master' of /repos/git/net-next-2.6Patrick McHardy22-503/+443
Conflicts: include/net/netfilter/xt_rateest.h net/bridge/br_netfilter.c net/netfilter/nf_conntrack_core.c Signed-off-by: Patrick McHardy <kaber@trash.net>
2010-06-14ipv6: RCU changes in ipv6_get_mtu() and ip6_dst_hoplimit()Eric Dumazet1-8/+11
Use RCU to avoid atomic ops on idev refcnt in ipv6_get_mtu() and ip6_dst_hoplimit() Signed-off-by: Eric Dumazet <eric.dumazet@gmail.com> Acked-by: YOSHIFUJI Hideaki <yoshfuji@linux-ipv6.org> Signed-off-by: David S. Miller <davem@davemloft.net>
2010-06-14ipv6: avoid two atomics in ipv6_rthdr_rcv()Eric Dumazet1-6/+4
Use __in6_dev_get() instead of in6_dev_get()/in6_dev_put() Signed-off-by: Eric Dumazet <eric.dumazet@gmail.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2010-06-14netfilter: defrag: kill unused work parameter of frag_kfree_skb()Shan Wei1-4/+2
The parameter (work) is unused, remove it. Reported from Eric Dumazet. Signed-off-by: Shan Wei <shanwei@cn.fujitsu.com> Acked-by: Eric Dumazet <eric.dumazet@gmail.com> Signed-off-by: Patrick McHardy <kaber@trash.net>
2010-06-14netfilter: defrag: remove one redundant atomic opsShan Wei1-2/+1
Instead of doing one atomic operation per frag, we can factorize them. Reported from Eric Dumazet. Signed-off-by: Shan Wei <shanwei@cn.fujitsu.com> Acked-by: Eric Dumazet <eric.dumazet@gmail.com> Signed-off-by: Patrick McHardy <kaber@trash.net>
2010-06-14netfilter: kill redundant check code in which setting ip_summed valueShan Wei1-3/+1
If the returned csum value is 0, We has set ip_summed with CHECKSUM_UNNECESSARY flag in __skb_checksum_complete_head(). So this patch kills the check and changes to return to upper caller directly. Signed-off-by: Shan Wei <shanwei@cn.fujitsu.com> Signed-off-by: Patrick McHardy <kaber@trash.net>
2010-06-11Merge branch 'master' of ↵David S. Miller2-3/+5
master.kernel.org:/pub/scm/linux/kernel/git/davem/net-2.6
2010-06-10net-next: remove useless union keywordChangli Gao11-220/+214
remove useless union keyword in rtable, rt6_info and dn_route. Since there is only one member in a union, the union keyword isn't useful. Signed-off-by: Changli Gao <xiaosuo@gmail.com> Signed-off-by: Eric Dumazet <eric.dumazet@gmail.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2010-06-09ipv6: fix ICMP6_MIB_OUTERRORSEric Dumazet1-2/+2
In commit 1f8438a85366 (icmp: Account for ICMP out errors), I did a typo on IPV6 side, using ICMP6_MIB_OUTMSGS instead of ICMP6_MIB_OUTERRORS Signed-off-by: Eric Dumazet <eric.dumazet@gmail.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2010-06-09ipv6: mcast: RCU conversionsEric Dumazet1-96/+87
- ipv6_sock_mc_join() : doesnt touch dev refcount - ipv6_sock_mc_drop() : doesnt touch dev/idev refcounts - ip6_mc_find_dev() becomes ip6_mc_find_dev_rcu() (called from rcu), and doesnt touch dev/idev refcounts - ipv6_sock_mc_close() : doesnt touch dev/idev refcounts - ip6_mc_source() uses ip6_mc_find_dev_rcu() - ip6_mc_msfilter() uses ip6_mc_find_dev_rcu() - ip6_mc_msfget() uses ip6_mc_find_dev_rcu() - ipv6_dev_mc_dec(), ipv6_chk_mcast_addr(), igmp6_event_query(), igmp6_event_report(), mld_sendpack(), igmp6_send() dont touch idev refcount Signed-off-by: Eric Dumazet <eric.dumazet@gmail.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2010-06-09netfilter: ip6_queue: rwlock to spinlock conversionEric Dumazet1-32/+25
Converts queue_lock rwlock to a spinlock. (readlocked part can be changed by reads of integer values) One atomic operation instead of four per ipq_enqueue_packet() call. Signed-off-by: Eric Dumazet <eric.dumazet@gmail.com> Signed-off-by: Patrick McHardy <kaber@trash.net>
2010-06-08netfilter: nf_conntrack: IPS_UNTRACKED bitEric Dumazet1-1/+1
NOTRACK makes all cpus share a cache line on nf_conntrack_untracked twice per packet. This is bad for performance. __read_mostly annotation is also a bad choice. This patch introduces IPS_UNTRACKED bit so that we can use later a per_cpu untrack structure more easily. A new helper, nf_ct_untracked_get() returns a pointer to nf_conntrack_untracked. Another one, nf_ct_untracked_status_or() is used by nf_nat_init() to add IPS_NAT_DONE_MASK bits to untracked status. nf_ct_is_untracked() prototype is changed to work on a nf_conn pointer. Signed-off-by: Eric Dumazet <eric.dumazet@gmail.com> Signed-off-by: Patrick McHardy <kaber@trash.net>
2010-06-07anycast: Some RCU conversionsEric Dumazet1-48/+42
- dev_get_by_flags() changed to dev_get_by_flags_rcu() - ipv6_sock_ac_join() dont touch dev & idev refcounts - ipv6_sock_ac_drop() dont touch dev & idev refcounts - ipv6_sock_ac_close() dont touch dev & idev refcounts - ipv6_dev_ac_dec() dount touch idev refcount - ipv6_chk_acast_addr() dont touch idev refcount Signed-off-by: Eric Dumazet <eric.dumazet@gmail.com> CC: Hideaki YOSHIFUJI <yoshfuji@linux-ipv6.org> Signed-off-by: David S. Miller <davem@davemloft.net>
2010-06-07ipmr: dont corrupt listsEric Dumazet1-1/+3
ipmr_rules_exit() and ip6mr_rules_exit() free a list of items, but forget to properly remove these items from list. List head is not changed and still points to freed memory. This can trigger a fault later when icmpv6_sk_exit() is called. Fix is to either reinit list, or use list_del() to properly remove items from list before freeing them. bugzilla report : https://bugzilla.kernel.org/show_bug.cgi?id=16120 Introduced by commit d1db275dd3f6e4 (ipv6: ip6mr: support multiple tables) and commit f0ad0860d01e (ipv4: ipmr: support multiple tables) Reported-by: Alex Zhavnerchik <alex.vizor@gmail.com> Signed-off-by: Eric Dumazet <eric.dumazet@gmail.com> CC: Patrick McHardy <kaber@trash.net> Signed-off-by: David S. Miller <davem@davemloft.net>
2010-06-07raw: avoid two atomics in xmitEric Dumazet1-5/+7
Avoid two atomic ops per raw_send_hdrinc() call Avoid two atomic ops per raw6_send_hdrinc() call Signed-off-by: Eric Dumazet <eric.dumazet@gmail.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2010-06-06Merge branch 'master' of ↵David S. Miller4-7/+8
master.kernel.org:/pub/scm/linux/kernel/git/davem/net-2.6 Conflicts: drivers/net/sfc/net_driver.h drivers/net/sfc/siena.c
2010-06-06ip6mr: fix a typo in ip6mr_for_each_table()Eric Dumazet1-1/+1
Signed-off-by: Eric Dumazet <eric.dumazet@gmail.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2010-06-05ipv6: avoid high order allocationsEric Dumazet1-1/+4
With mtu=9000, mld_newpack() use order-2 GFP_ATOMIC allocations, that are very unreliable, on machines where PAGE_SIZE=4K Limit allocated skbs to be at most one page. (order-0 allocations) Signed-off-by: Eric Dumazet <eric.dumazet@gmail.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2010-06-05syncookies: update mss tablesFlorian Westphal1-24/+15
- ipv6 msstab: account for ipv6 header size - ipv4 msstab: add mss for Jumbograms. Signed-off-by: Florian Westphal <fw@strlen.de> Signed-off-by: David S. Miller <davem@davemloft.net>
2010-06-05syncookies: avoid unneeded tcp header flag double checkFlorian Westphal2-2/+2
caller: if (!th->rst && !th->syn && th->ack) callee: if (!th->ack) make the caller only check for !syn (common for 3whs), and move the !rst / ack test to the callee. Signed-off-by: Florian Westphal <fw@strlen.de> Signed-off-by: David S. Miller <davem@davemloft.net>
2010-06-04netfilter: vmalloc_node cleanupEric Dumazet1-4/+3
Using vmalloc_node(size, numa_node_id()) for temporary storage is not needed. vmalloc(size) is more respectful of user NUMA policy. Signed-off-by: Eric Dumazet <eric.dumazet@gmail.com> Signed-off-by: Patrick McHardy <kaber@trash.net>
2010-06-02ipv6: Refactor update of IPv6 flowi destination address for srcrt (RH) optionArnaud Ebalard8-72/+45
There are more than a dozen occurrences of following code in the IPv6 stack: if (opt && opt->srcrt) { struct rt0_hdr *rt0 = (struct rt0_hdr *) opt->srcrt; ipv6_addr_copy(&final, &fl.fl6_dst); ipv6_addr_copy(&fl.fl6_dst, rt0->addr); final_p = &final; } Replace those with a helper. Note that the helper overrides final_p in all cases. This is ok as final_p was previously initialized to NULL when declared. Signed-off-by: Arnaud Ebalard <arno@natisbad.org> Signed-off-by: David S. Miller <davem@davemloft.net>
2010-06-02net: CONFIG_NET_NS reductionEric Dumazet1-5/+1
Use read_pnet() and write_pnet() to reduce number of ifdef CONFIG_NET_NS Signed-off-by: Eric Dumazet <eric.dumazet@gmail.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2010-06-01ipv6: get rid of ipip6_prl_lockEric Dumazet1-6/+2
As noticed by Julia Lawall, ipip6_tunnel_add_prl() incorrectly calls kzallloc(..., GFP_KERNEL) while a spinlock is held. She provided a patch to use GFP_ATOMIC instead. One possibility would be to convert this spinlock to a mutex, or preallocate the thing before taking the lock. After RCU conversion, it appears we dont need this lock, since caller already holds RTNL Signed-off-by: Eric Dumazet <eric.dumazet@gmail.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2010-06-01net/ipv6/mcast.c: Remove unnecessary kmalloc castsJoe Perches1-2/+1
Signed-off-by: Joe Perches <joe@perches.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2010-05-31Merge branch 'master' of ↵David S. Miller1-1/+1
git://git.kernel.org/pub/scm/linux/kernel/git/kaber/nf-2.6
2010-05-31net: sock_queue_err_skb() dont mess with sk_forward_allocEric Dumazet1-4/+2
Correct sk_forward_alloc handling for error_queue would need to use a backlog of frames that softirq handler could not deliver because socket is owned by user thread. Or extend backlog processing to be able to process normal and error packets. Another possibility is to not use mem charge for error queue, this is what I implemented in this patch. Note: this reverts commit 29030374 (net: fix sk_forward_alloc corruptions), since we dont need to lock socket anymore. Signed-off-by: Eric Dumazet <eric.dumazet@gmail.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2010-05-31netfilter: xtables: stackptr should be percpuEric Dumazet1-1/+1
commit f3c5c1bfd4 (netfilter: xtables: make ip_tables reentrant) introduced a performance regression, because stackptr array is shared by all cpus, adding cache line ping pongs. (16 cpus share a 64 bytes cache line) Fix this using alloc_percpu() Signed-off-by: Eric Dumazet <eric.dumazet@gmail.com> Acked-By: Jan Engelhardt <jengelh@medozas.de> Signed-off-by: Patrick McHardy <kaber@trash.net>
2010-05-29net: fix sk_forward_alloc corruptionsEric Dumazet1-2/+4
As David found out, sock_queue_err_skb() should be called with socket lock hold, or we risk sk_forward_alloc corruption, since we use non atomic operations to update this field. This patch adds bh_lock_sock()/bh_unlock_sock() pair to three spots. (BH already disabled) 1) skb_tstamp_tx() 2) Before calling ip_icmp_error(), in __udp4_lib_err() 3) Before calling ipv6_icmp_error(), in __udp6_lib_err() Reported-by: Anton Blanchard <anton@samba.org> Signed-off-by: Eric Dumazet <eric.dumazet@gmail.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2010-05-28IPv6: fix Mobile IPv6 regressionBrian Haley1-1/+1
Commit f4f914b5 (net: ipv6 bind to device issue) caused a regression with Mobile IPv6 when it changed the meaning of fl->oif to become a strict requirement of the route lookup. Instead, only force strict mode when sk->sk_bound_dev_if is set on the calling socket, getting the intended behavior and fixing the regression. Tested-by: Arnaud Ebalard <arno@natisbad.org> Signed-off-by: Brian Haley <brian.haley@hp.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2010-05-28ipv6: Add GSO support on forwarding pathHerbert Xu1-1/+1
Currently we disallow GSO packets on the IPv6 forward path. This patch fixes this. Note that I discovered that our existing GSO MTU checks (e.g., IPv4 forwarding) are buggy in that they skip the check altogether, when they really should be checking gso_size + header instead. I have also been lazy here in that I haven't bothered to segment the GSO packet by hand before generating an ICMP message. Someone should add that to be 100% correct. Reported-by: Ralf Baechle <ralf@linux-mips.org> Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au> Signed-off-by: David S. Miller <davem@davemloft.net>
2010-05-27net: fix lock_sock_bh/unlock_sock_bhEric Dumazet1-2/+3
This new sock lock primitive was introduced to speedup some user context socket manipulation. But it is unsafe to protect two threads, one using regular lock_sock/release_sock, one using lock_sock_bh/unlock_sock_bh This patch changes lock_sock_bh to be careful against 'owned' state. If owned is found to be set, we must take the slow path. lock_sock_bh() now returns a boolean to say if the slow path was taken, and this boolean is used at unlock_sock_bh time to call the appropriate unlock function. After this change, BH are either disabled or enabled during the lock_sock_bh/unlock_sock_bh protected section. This might be misleading, so we rename these functions to lock_sock_fast()/unlock_sock_fast(). Reported-by: Anton Blanchard <anton@samba.org> Signed-off-by: Eric Dumazet <eric.dumazet@gmail.com> Tested-by: Anton Blanchard <anton@samba.org> Signed-off-by: David S. Miller <davem@davemloft.net>
2010-05-26ipmr: off by one in __ipmr_fill_mroute()Dan Carpenter1-1/+1
This fixes a smatch warning: net/ipv4/ipmr.c +1917 __ipmr_fill_mroute(12) error: buffer overflow '(mrt)->vif_table' 32 <= 32 The ipv6 version had the same issue. Signed-off-by: Dan Carpenter <error27@gmail.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2010-05-18ipv6: Never schedule DAD timer on dead addressHerbert Xu1-2/+8
This patch ensures that all places that schedule the DAD timer look at the address state in a safe manner before scheduling the timer. This ensures that we don't end up with pending timers after deleting an address. Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au> Signed-off-by: David S. Miller <davem@davemloft.net>
2010-05-18ipv6: Use POSTDAD stateHerbert Xu1-5/+24
This patch makes use of the new POSTDAD state. This prevents a race between DAD completion and failure. Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au> Signed-off-by: David S. Miller <davem@davemloft.net>
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