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2009-02-18netfilter: remove unneeded gotoJan Engelhardt1-2/+0
Signed-off-by: Jan Engelhardt <jengelh@medozas.de> Signed-off-by: Patrick McHardy <kaber@trash.net>
2008-10-08netfilter: enable netfilter in netnsAlexey Dobriyan1-8/+0
From kernel perspective, allow entrance in nf_hook_slow(). Stuff which uses nf_register_hook/nf_register_hooks, but otherwise not netns-ready: DECnet netfilter ipt_CLUSTERIP nf_nat_standalone.c together with XFRM (?) IPVS several individual match modules (like hashlimit) ctnetlink NOTRACK all sorts of queueing and reporting to userspace L3 and L4 protocol sysctls, bridge sysctls probably something else Anyway critical mass has been achieved, there is no reason to hide netfilter any longer. From userspace perspective, allow to manipulate all sorts of iptables/ip6tables/arptables rules. Signed-off-by: Alexey Dobriyan <adobriyan@gmail.com> Signed-off-by: Patrick McHardy <kaber@trash.net>
2008-10-08netfilter: Introduce NFPROTO_* constantsJan Engelhardt1-3/+3
The netfilter subsystem only supports a handful of protocols (much less than PF_*) and even non-PF protocols like ARP and pseudo-protocols like PF_BRIDGE. By creating NFPROTO_*, we can earn a few memory savings on arrays that previously were always PF_MAX-sized and keep the pseudo-protocols to ourselves. Signed-off-by: Jan Engelhardt <jengelh@medozas.de> Signed-off-by: Patrick McHardy <kaber@trash.net>
2008-10-08netfilter: Use unsigned types for hooknum and pf varsJan Engelhardt1-2/+2
and (try to) consistently use u_int8_t for the L3 family. Signed-off-by: Jan Engelhardt <jengelh@medozas.de> Signed-off-by: Patrick McHardy <kaber@trash.net>
2008-03-26[NET] NETNS: Omit net_device->nd_net without CONFIG_NET_NS.YOSHIFUJI Hideaki1-1/+1
Introduce per-net_device inlines: dev_net(), dev_net_set(). Without CONFIG_NET_NS, no namespace other than &init_net exists. Let's explicitly define them to help compiler optimizations. Signed-off-by: YOSHIFUJI Hideaki <yoshfuji@linux-ipv6.org>
2008-03-24[NETNS]: Process netfilter hooks in initial namespace only.Denis V. Lunev1-0/+8
There were no packets in the namespace other than initial previously. This will be changed in the neareast future. Netfilters are not namespace aware and should be processed in the initial namespace only for now. Signed-off-by: Denis V. Lunev <den@openvz.org> Signed-off-by: David S. Miller <davem@davemloft.net>
2008-01-28[NETFILTER]: kill nf_sysctl.cPatrick McHardy1-0/+9
Since there now is generic support for shared sysctl paths, the only remains are the net/netfilter and net/ipv4/netfilter paths. Move them to net/netfilter/core.c and net/ipv4/netfilter.c and kill nf_sysctl.c. Signed-off-by: Patrick McHardy <kaber@trash.net> Signed-off-by: David S. Miller <davem@davemloft.net>
2008-01-28[NETFILTER]: constify nf_afinfoPatrick McHardy1-3/+3
Signed-off-by: Patrick McHardy <kaber@trash.net> Signed-off-by: David S. Miller <davem@davemloft.net>
2008-01-28[NETFILTER]: remove annoying debugging messagePatrick McHardy1-2/+1
Don't log "nf_hook: Verdict = QUEUE." message with NETFILTER_DEBUG=y. Signed-off-by: Patrick McHardy <kaber@trash.net> Signed-off-by: David S. Miller <davem@davemloft.net>
2008-01-28[NETFILTER]: nf_queue: remove unnecessary hook existance checkPatrick McHardy1-5/+0
We hold a module reference for each queued packet, so the hook that queued the packet can't disappear. Also remove an obsolete comment stating the opposite. Signed-off-by: Patrick McHardy <kaber@trash.net> Signed-off-by: David S. Miller <davem@davemloft.net>
2008-01-28[NETFILTER]: replace list_for_each with list_for_each_entryLi Zefan1-4/+4
Signed-off-by: Li Zefan <lizf@cn.fujitsu.com> Signed-off-by: Patrick McHardy <kaber@trash.net> Signed-off-by: David S. Miller <davem@davemloft.net>
2008-01-28[NET]: Move netfilter checksum helpers to net/core/utils.cPatrick McHardy1-16/+0
This allows to get rid of the CONFIG_NETFILTER dependency of NET_ACT_NAT. This patch redefines the old names to keep the noise low, the next patch converts all users. Signed-off-by: Patrick McHardy <kaber@trash.net> Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au> Signed-off-by: David S. Miller <davem@davemloft.net>
2007-10-15[NETFILTER]: Replace sk_buff ** with sk_buff *Herbert Xu1-5/+5
With all the users of the double pointers removed, this patch mops up by finally replacing all occurances of sk_buff ** in the netfilter API by sk_buff *. Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au> Signed-off-by: David S. Miller <davem@davemloft.net>
2007-10-15[NETFILTER]: Do not copy skb in skb_make_writableHerbert Xu1-24/+14
Now that all callers of netfilter can guarantee that the skb is not shared, we no longer have to copy the skb in skb_make_writable. Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au> Signed-off-by: David S. Miller <davem@davemloft.net>
2007-10-10[NET]: Make /proc/net per network namespaceEric W. Biederman1-1/+2
This patch makes /proc/net per network namespace. It modifies the global variables proc_net and proc_net_stat to be per network namespace. The proc_net file helpers are modified to take a network namespace argument, and all of their callers are fixed to pass &init_net for that argument. This ensures that all of the /proc/net files are only visible and usable in the initial network namespace until the code behind them has been updated to be handle multiple network namespaces. Making /proc/net per namespace is necessary as at least some files in /proc/net depend upon the set of network devices which is per network namespace, and even more files in /proc/net have contents that are relevant to a single network namespace. Signed-off-by: Eric W. Biederman <ebiederm@xmission.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2007-07-10[NETFILTER]: add some consts, remove some castsJan Engelhardt1-3/+3
Make a number of variables const and/or remove unneeded casts. Signed-off-by: Jan Engelhardt <jengelh@gmx.de> Signed-off-by: Patrick McHardy <kaber@trash.net> Signed-off-by: David S. Miller <davem@davemloft.net>
2007-07-10[SKBUFF]: Keep track of writable header len of headerless clonesPatrick McHardy1-1/+3
Currently NAT (and others) that want to modify cloned skbs copy them, even if in the vast majority of cases its not necessary because the skb is a clone made by TCP and the portion NAT wants to modify is actually writable because TCP release the header reference before cloning. The problem is that there is no clean way for NAT to find out how long the writable header area is, so this patch introduces skb->hdr_len to hold this length. When a headerless skb is cloned skb->hdr_len is set to the current headroom, for regular clones it is copied from the original. A new function skb_clone_writable(skb, len) returns whether the skb is writable up to len bytes from skb->data. To avoid enlarging the skb the mac_len field is reduced to 16 bit and the new hdr_len field is put in the remaining 16 bit. I've done a few rough benchmarks of NAT (not with this exact patch, but a very similar one). As expected it saves huge amounts of system time in case of sendfile, bringing it down to basically the same amount as without NAT, with sendmsg it only helps on loopback, probably because of the large MTU. Transmit a 1GB file using sendfile/sendmsg over eth0/lo with and without NAT: - sendfile eth0, no NAT: sys 0m0.388s - sendfile eth0, NAT: sys 0m1.835s - sendfile eth0: NAT + path: sys 0m0.370s (~ -80%) - sendfile lo, no NAT: sys 0m0.258s - sendfile lo, NAT: sys 0m2.609s - sendfile lo, NAT + patch: sys 0m0.260s (~ -90%) - sendmsg eth0, no NAT: sys 0m2.508s - sendmsg eth0, NAT: sys 0m2.539s - sendmsg eth0, NAT + patch: sys 0m2.445s (no change) - sendmsg lo, no NAT: sys 0m2.151s - sendmsg lo, NAT: sys 0m3.557s - sendmsg lo, NAT + patch: sys 0m2.159s (~ -40%) I expect other users can see a similar performance improvement, packet mangling iptables targets, ipip and ip_gre come to mind .. Signed-off-by: Patrick McHardy <kaber@trash.net> Signed-off-by: David S. Miller <davem@davemloft.net>
2007-04-25[NETFILTER]: nf_conntrack: kill destroy() in struct nf_conntrack for dietYasuyuki Kozakai1-1/+16
The destructor per conntrack is unnecessary, then this replaces it with system wide destructor. Signed-off-by: Yasuyuki Kozakai <yasuyuki.kozakai@toshiba.co.jp> Signed-off-by: Patrick McHardy <kaber@trash.net> Signed-off-by: David S. Miller <davem@davemloft.net>
2007-04-25[NETFILTER]: nf_conntrack: don't use nfct in skb if conntrack is disabledYasuyuki Kozakai1-0/+2
Signed-off-by: Yasuyuki Kozakai <yasuyuki.kozakai@toshiba.co.jp> Signed-off-by: Patrick McHardy <kaber@trash.net> Signed-off-by: David S. Miller <davem@davemloft.net>
2007-04-25[NETFILTER]: Remove changelogs and CVS IDsPatrick McHardy1-4/+0
Signed-off-by: Patrick McHardy <kaber@trash.net> Signed-off-by: David S. Miller <davem@davemloft.net>
2007-02-12[NETFILTER]: Fix whitespace errorsYOSHIFUJI Hideaki1-3/+3
Signed-off-by: YOSHIFUJI Hideaki <yoshfuji@linux-ipv6.org> Signed-off-by: Patrick McHardy <kaber@trash.net> Signed-off-by: David S. Miller <davem@davemloft.net>
2007-02-12[NETFILTER]: Switch nf_register_hook/nf_unregister_hook to mutexPatrick McHardy1-5/+8
The spinlock is only used in process context (register/unregister) since RCU is used for the nf_hook lists, switch to a mutex. Signed-off-by: Patrick McHardy <kaber@trash.net> Signed-off-by: David S. Miller <davem@davemloft.net>
2007-02-12[NETFILTER]: Switch nf_register_afinfo/nf_unregister_afinfo to mutexPatrick McHardy1-5/+10
The spinlock is only used in process context (register/unregister), switch to a mutex. Signed-off-by: Patrick McHardy <kaber@trash.net> Signed-off-by: David S. Miller <davem@davemloft.net>
2007-02-12[NETFILTER]: Remove unnecessary synchronize_net() in nf_register_hookPatrick McHardy1-2/+0
We're only adding to the list, no need to synchronize. Signed-off-by: Patrick McHardy <kaber@trash.net> Signed-off-by: David S. Miller <davem@davemloft.net>
2007-02-12[NETFILTER]: Properly use RCU in nf_ct_attachPatrick McHardy1-3/+6
Use rcu_assign_pointer/rcu_dereference for ip_ct_attach pointer instead of self-made RCU and use rcu_read_lock to make sure the conntrack module doesn't disappear below us while calling it, since this function can be called from outside the netfilter hooks. Signed-off-by: Patrick McHardy <kaber@trash.net> Signed-off-by: David S. Miller <davem@davemloft.net>
2006-12-02[NETFILTER]: More __read_mostly annotationsMartin Josefsson1-2/+2
Place rarely written variables in the read-mostly section by using __read_mostly Signed-off-by: Martin Josefsson <gandalf@wlug.westbo.se> Signed-off-by: Patrick McHardy <kaber@trash.net>
2006-12-02[NET]: netfilter checksum annotationsAl Viro1-17/+10
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk> Signed-off-by: David S. Miller <davem@davemloft.net>
2006-09-22[NETFILTER]: nf_queue: handle GSO packetsPatrick McHardy1-1/+1
Handle GSO packets in nf_queue by segmenting them before queueing to avoid breaking GSO in case they get mangled. Signed-off-by: Patrick McHardy <kaber@trash.net> Signed-off-by: David S. Miller <davem@davemloft.net>
2006-09-22[NETFILTER]: Get rid of HW checksum invalidationPatrick McHardy1-0/+22
Update hardware checksums incrementally to avoid breaking GSO. Signed-off-by: Patrick McHardy <kaber@trash.net> Signed-off-by: David S. Miller <davem@davemloft.net>
2006-06-30Remove obsolete #include <linux/config.h>Jörn Engel1-1/+0
Signed-off-by: Jörn Engel <joern@wohnheim.fh-wedel.de> Signed-off-by: Adrian Bunk <bunk@stusta.de>
2006-04-09[NETFILTER]: Introduce infrastructure for address family specific operationsPatrick McHardy1-0/+23
Change the queue rerouter intrastructure to a generic usable infrastructure for address family specific operations as a base for some cleanups. Signed-off-by: Patrick McHardy <kaber@trash.net> Signed-off-by: David S. Miller <davem@davemloft.net>
2006-04-09[NETFILTER]: Add helper functions for mass hook registration/unregistrationPatrick McHardy1-0/+28
Signed-off-by: Patrick McHardy <kaber@trash.net> Signed-off-by: David S. Miller <davem@davemloft.net>
2005-08-29[NETFILTER]: split net/core/netfilter.c into net/netfilter/*.cHarald Welte1-0/+216
This patch doesn't introduce any code changes, but merely splits the core netfilter code into four separate files. It also moves it from it's old location in net/core/ to the recently-created net/netfilter/ directory. Signed-off-by: Harald Welte <laforge@netfilter.org> Signed-off-by: David S. Miller <davem@davemloft.net>
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