Sowmini Varadhan 6fa01ccd88 skbuff: Add pskb_extract() helper function ... A pattern of skb usage seen in modules such as RDS-TCP is to extract `to_copy' bytes from the received TCP segment, starting at some offset `off' into a new skb `clone'. This is done in the ->data_ready callback, where the clone skb is queued up for rx on the PF_RDS socket, while the parent TCP segment is returned unchanged back to the TCP engine. The existing code uses the sequence clone = skb_clone(..); pskb_pull(clone, off, ..); pskb_trim(clone, to_copy, ..); with the intention of discarding the first `off' bytes. However, skb_clone() + pskb_pull() implies pksb_expand_head(), which ends up doing a redundant memcpy of bytes that will then get discarded in __pskb_pull_tail(). To avoid this inefficiency, this commit adds pskb_extract() that creates the clone, and memcpy's only the relevant header/frag/frag_list to the start of `clone'. pskb_trim() is then invoked to trim clone down to the requested to_copy bytes. Signed-off-by: Sowmini Varadhan <sowmini.varadhan@oracle.com> Signed-off-by: David S. Miller <davem@davemloft.net>		2016-04-25 16:54:14 -04:00
..
6lowpan	6lowpan: iphc: fix handling of link-local compression	2016-04-08 19:28:13 +02:00
9p	net/9p: convert to new CQ API	2016-03-10 20:54:09 -05:00
802
8021q	vlan: propagate gso_max_segs	2016-03-17 21:05:01 -04:00
appletalk	appletalk: fix erroneous return value	2016-02-18 14:59:34 -05:00
atm	net: Generalise wq_has_sleeper helper	2015-11-30 14:47:33 -05:00
ax25	ax25: add link layer header validation function	2016-03-09 22:13:01 -05:00
batman-adv	batman-adv: clarify CFG80211 dependency	2016-03-02 13:45:47 -05:00
bluetooth	sock: tigthen lockdep checks for sock_owned_by_user	2016-04-13 22:37:20 -04:00
bridge	bridge: use nla_put_u64_64bit()	2016-04-25 15:09:10 -04:00
caif	net: caif: fix misleading indentation	2016-03-14 13:09:50 -04:00
can	sock: enable timestamping using control messages	2016-04-04 15:50:30 -04:00
ceph	mm, fs: get rid of PAGE_CACHE_* and page_cache_{get,release} macros	2016-04-04 10:41:08 -07:00
core	skbuff: Add pskb_extract() helper function	2016-04-25 16:54:14 -04:00
dcb
dccp	net: introduce lockdep_is_held and update various places to use it	2016-04-07 16:44:14 -04:00
decnet	decnet: Do not build routes to devices without decnet private data.	2016-04-10 23:01:30 -04:00
dns_resolver	net: dns_resolver: convert time_t to time64_t	2015-11-18 16:27:46 -05:00
dsa	net: dsa: remove tag_protocol from dsa_switch	2016-04-21 13:43:11 -04:00
ethernet	eth: Pull header from first fragment via eth_get_headlen	2016-02-24 13:58:05 -05:00
hsr	NLA_BINARY misuse bug in HSR	2016-04-21 13:59:08 -04:00
ieee802154	ieee802154: use nla_put_u64_64bit()	2016-04-25 15:09:11 -04:00
ipv4	net: better drop monitoring in ip{6}_recv_error()	2016-04-25 15:48:10 -04:00
ipv6	net: better drop monitoring in ip{6}_recv_error()	2016-04-25 15:48:10 -04:00
ipx
irda	Merge 4.5-rc4 into tty-next	2016-02-14 14:36:04 -08:00
iucv	af_iucv: Validate socket address length in iucv_sock_bind()	2016-01-19 14:21:08 -05:00
kcm	kcm: Add receive message timeout	2016-03-09 16:36:15 -05:00
key	af_key: fix two typos	2015-10-23 03:05:19 -07:00
l2tp	l2tp: use nla_put_u64_64bit()	2016-04-25 15:09:10 -04:00
l3mdev	net: l3mdev: address selection should only consider devices in L3 domain	2016-02-26 14:22:26 -05:00
lapb
llc	sock: tigthen lockdep checks for sock_owned_by_user	2016-04-13 22:37:20 -04:00
mac80211	cfg80211: remove enum ieee80211_band	2016-04-12 15:56:15 +02:00
mac802154	Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net-next	2016-03-19 10:05:34 -07:00
mpls	GSO: Add GSO type for fixed IPv4 ID	2016-04-14 16:23:40 -04:00
netfilter	netfilter/ipvs: use nla_put_u64_64bit()	2016-04-25 15:09:11 -04:00
netlabel	netlabel: do not initialise statics to NULL	2016-03-07 11:08:26 -05:00
netlink	Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net	2016-04-23 18:51:33 -04:00
netrom
nfc	Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net-next	2016-03-19 10:05:34 -07:00
openvswitch	ovs: use nla_put_u64_64bit()	2016-04-25 15:09:10 -04:00
packet	Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net	2016-04-23 18:51:33 -04:00
phonet	sock: struct proto hash function may error	2016-02-11 03:54:14 -05:00
rds	RDS: Fix the atomicity for congestion map update	2016-04-16 19:01:05 -04:00
rfkill	rfkill: Use switch to demux userspace operations	2016-04-05 10:48:53 +02:00
rose
rxrpc	rxrpc: Create a null security type and get rid of conditional calls	2016-04-11 15:34:41 -04:00
sched	codel: split into multiple files	2016-04-25 16:44:27 -04:00
sctp	Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net	2016-04-23 18:51:33 -04:00
sunrpc	Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net	2016-04-23 18:51:33 -04:00
switchdev	switchdev: fix typo in comments/doc	2016-03-24 14:51:24 -04:00
tipc	tipc: fix stale links after re-enabling bearer	2016-04-24 14:35:07 -04:00
unix	Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net	2016-02-23 00:09:14 -05:00
vmw_vsock	VSOCK: Only check error on skb_recv_datagram when skb is NULL	2016-04-19 20:42:01 -04:00
wimax
wireless	wireless: use nla_put_u64_64bit()	2016-04-25 15:09:11 -04:00
x25
xfrm	xfrm: align nlattr properly when needed	2016-04-23 20:13:25 -04:00
compat.c
Kconfig	Make DST_CACHE a silent config option	2016-03-21 22:56:38 -04:00
Makefile	kcm: Kernel Connection Multiplexor module	2016-03-09 16:36:14 -05:00
socket.c	Merge branch 'for-davem' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs	2016-04-14 00:39:15 -04:00
sysctl_net.c	net: sysctl: fix a kmemleak warning	2015-10-23 06:22:08 -07:00