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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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