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Eric Dumazet 70978182d4 net: timestamp cloned packet in dev_queue_xmit_nit 
Le vendredi 17 décembre 2010 à 10:26 +0100, Eric Dumazet a écrit :

>
> I think we can add this after latest Changli patch :
>
> He does one skb_clone() before calling the sniffers.
> We could set timestamp on this clone, instead of original skb.
>
> Problem solved.
>

[PATCH net-next-2.6] net: timestamp cloned packet in dev_queue_xmit_nit

Now we do one clone of skb if at least one sniffer might take packet,
we also can do the skb timestamping on the clone and let original packet
unchanged.

This is a generalization of commit 8caf153974 (net: sch_netem: Fix an
inconsistency in ingress netem timestamps.)

This way, we can have a good idea when packets are delivered to our
stack (tcpdump -i ifb0), while a tcpdump on original device gives
timestamps right before ingressing.

This also speedup our stack, avoiding taking timestamps if not needed.

Signed-off-by: Eric Dumazet <eric.dumazet@gmail.com>
Cc: Changli Gao <xiaosuo@gmail.com>
Cc: Patrick McHardy <kaber@trash.net>
Cc: Jarek Poplawski <jarkao2@gmail.com>
Acked-by: Changli Gao <xiaosuo@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
2010-12-21 10:50:38 -08:00
..
9p net/9p/protocol.c: Remove duplicated macros. 2010-12-08 09:56:28 -08:00
802 net/802: add __rcu annotations 2010-10-25 13:09:44 -07:00
8021q 8021q: vlan device is lockless do not transfer real_num_{tx|rx}_queues 2010-11-28 10:47:19 -08:00
appletalk
atm net: kill unused macros 2010-12-19 21:59:35 -08:00
ax25 net: ax25: fix information leak to userland 2010-11-10 10:14:33 -08:00
batman-adv batman-adv: Return hna count on local buffer fill 2010-12-20 10:32:03 -08:00
bluetooth Merge branch 'master' of master.kernel.org:/pub/scm/linux/kernel/git/davem/net-2.6 2010-12-17 12:27:22 -08:00
bridge Merge branch 'master' of master.kernel.org:/pub/scm/linux/kernel/git/davem/net-2.6 2010-12-17 12:27:22 -08:00
caif Net: caif: Makefile: Remove deprecated items 2010-11-22 08:16:09 -08:00
can Net: can: Makefile: Remove deprecated kbuild goal definitions 2010-11-22 08:16:09 -08:00
ceph Merge branch 'master' of master.kernel.org:/pub/scm/linux/kernel/git/davem/net-2.6 2010-12-08 13:47:38 -08:00
core net: timestamp cloned packet in dev_queue_xmit_nit 2010-12-21 10:50:38 -08:00
dcb
dccp dccp: remove unused macros 2010-12-10 12:49:23 +01:00
decnet net: Abstract default MTU metric calculation behind an accessor. 2010-12-14 13:01:14 -08:00
dns_resolver Net: dns_resolver: Makefile: Remove deprecated kbuild goal definitions 2010-11-22 08:16:10 -08:00
dsa phylib: available for any speed ethernet 2010-08-11 23:03:50 -07:00
econet Merge branch 'master' of master.kernel.org:/pub/scm/linux/kernel/git/davem/net-2.6 2010-12-17 12:27:22 -08:00
ethernet net: return operator cleanup 2010-09-23 14:33:39 -07:00
ieee802154 net: RCU conversion of dev_getbyhwaddr() and arp_ioctl() 2010-12-08 10:07:24 -08:00
ipv4 TCP: increase default initial receive window. 2010-12-20 21:33:00 -08:00
ipv6 Merge branch 'master' of master.kernel.org:/pub/scm/linux/kernel/git/davem/net-2.6 2010-12-20 13:24:14 -08:00
ipx BKL: introduce CONFIG_BKL. 2010-10-21 15:44:13 +02:00
irda Net: irda: irnet: Makefile: Remove deprecated kbuild goal definitions 2010-11-22 08:16:13 -08:00
iucv [S390] cleanup lowcore access from external interrupts 2010-10-25 16:10:19 +02:00
key net: return operator cleanup 2010-09-23 14:33:39 -07:00
l2tp Merge branch 'master' of master.kernel.org:/pub/scm/linux/kernel/git/davem/net-2.6 2010-12-08 13:47:38 -08:00
lapb Net: lapb: Makefile: Remove deprecated kbuild goal definitions 2010-11-22 08:16:14 -08:00
llc net: RCU conversion of dev_getbyhwaddr() and arp_ioctl() 2010-12-08 10:07:24 -08:00
mac80211 Merge branch 'master' of master.kernel.org:/pub/scm/linux/kernel/git/davem/net-2.6 2010-12-17 12:27:22 -08:00
netfilter Merge branch 'master' of master.kernel.org:/pub/scm/linux/kernel/git/davem/net-2.6 2010-11-19 13:13:47 -08:00
netlabel net: kill unused macros 2010-12-19 21:59:35 -08:00
netlink netlink: fix netlink_change_ngroups() 2010-10-24 16:25:39 -07:00
netrom
packet net: Use skb_checksum_start_offset() 2010-12-16 14:43:14 -08:00
phonet Net: phonet: Makefile: Remove deprecated kbuild goal definitions 2010-11-22 08:16:14 -08:00
rds Net: rds: Makefile: Remove deprecated items 2010-11-22 08:16:15 -08:00
rfkill rfkill: remove dead code 2010-11-15 13:24:06 -05:00
rose Merge branch 'master' of master.kernel.org:/pub/scm/linux/kernel/git/davem/net-2.6 2010-09-27 01:03:03 -07:00
rxrpc Net: rxrpc: Makefile: Remove deprecated kbuild goal definitions 2010-11-22 08:16:15 -08:00
sched net_sched: sch_sfq: better struct layouts 2010-12-20 21:32:59 -08:00
sctp Merge branch 'master' of master.kernel.org:/pub/scm/linux/kernel/git/davem/net-2.6 2010-12-17 12:27:22 -08:00
sunrpc Net: sunrpc: auth_gss: Makefile: Remove deprecated kbuild goal definitions 2010-11-22 08:16:16 -08:00
tipc tipc: Delete tipc_ownidentity() 2010-12-02 13:34:06 -08:00
unix Merge branch 'master' of master.kernel.org:/pub/scm/linux/kernel/git/davem/net-2.6 2010-12-08 13:47:38 -08:00
wanrouter Net: wanrouter: Makefile: Remove deprecated kbuild goal definitions 2010-11-22 08:16:16 -08:00
wimax
wireless cfg80211: Add new BSS attribute ht_opmode 2010-12-08 15:38:43 -05:00
x25 Merge branch 'master' of master.kernel.org:/pub/scm/linux/kernel/git/davem/net-2.6 2010-12-08 13:47:38 -08:00
xfrm Merge branch 'master' of master.kernel.org:/pub/scm/linux/kernel/git/davem/net-2.6 2010-12-17 12:27:22 -08:00
compat.c net: Limit socket I/O iovec total length to INT_MAX. 2010-10-28 11:47:52 -07:00
Kconfig net: Add batman-adv meshing protocol 2010-12-16 13:44:24 -08:00
Makefile net: Add batman-adv meshing protocol 2010-12-16 13:44:24 -08:00
nonet.c llseek: automatically add .llseek fop 2010-10-15 15:53:27 +02:00
socket.c Merge branch 'master' of master.kernel.org:/pub/scm/linux/kernel/git/davem/net-2.6 2010-12-17 12:27:22 -08:00
sysctl_net.c
TUNABLE