Paolo Abeni 63d75463c9 net: pktgen: fix pkt_size ...

The commit 879c7220e8 ("net: pktgen: Observe needed_headroom
of the device") increased the 'pkt_overhead' field value by
LL_RESERVED_SPACE.
As a side effect the generated packet size, computed as:

	/* Eth + IPh + UDPh + mpls */
	datalen = pkt_dev->cur_pkt_size - 14 - 20 - 8 -
		  pkt_dev->pkt_overhead;

is decreased by the same value.
The above changed slightly the behavior of existing pktgen users,
and made the procfs interface somewhat inconsistent.
Fix it by restoring the previous pkt_overhead value and using
LL_RESERVED_SPACE as extralen in skb allocation.
Also, change pktgen_alloc_skb() to only partially reserve
the headroom to allow the caller to prefetch from ll header
start.

v1 -> v2:
 - fixed some typos in the comments

Fixes: 879c7220e8 ("net: pktgen: Observe needed_headroom of the device")
Suggested-by: Ben Greear <greearb@candelatech.com>
Signed-off-by: Paolo Abeni <pabeni@redhat.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

2016-10-03 01:29:57 -04:00

..

datagram.c

udp: enable MSG_PEEK at non-zero offset

2016-04-05 16:29:37 -04:00

dev_addr_lists.c

…

dev_ioctl.c

…

dev.c

Merge branch 'master' of git://git.kernel.org/pub/scm/linux/kernel/git/davem/net-next

2016-09-25 23:34:19 +02:00

devlink.c

devlink: add hardware messages tracing facility

2016-07-12 14:20:18 -07:00

drop_monitor.c

drop_monitor: make genl_multicast_group const

2016-09-01 14:09:00 -07:00

dst_cache.c

net: dst_cache_per_cpu_dst_set() can be static

2016-03-18 17:45:08 -04:00

dst.c

net: add dst_cache to ovs vxlan lwtunnel

2016-02-16 20:21:48 -05:00

ethtool.c

sctp: Add GSO support

2016-06-03 19:37:21 -04:00

fib_rules.c

fib_rules: Added NLM_F_EXCL support to fib_nl_newrule

2016-06-30 08:23:19 -04:00

filter.c

bpf: add helper to invalidate hash

2016-09-23 08:40:28 -04:00

flow_dissector.c

Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net

2016-09-12 15:52:44 -07:00

flow.c

flowcache: Avoid OOM condition under preasure

2016-03-17 10:28:42 +01:00

gen_estimator.c

net: sched: do not acquire qdisc spinlock in qdisc/class stats dump

2016-06-07 16:37:14 -07:00

gen_stats.c

Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net

2016-06-10 11:52:24 -07:00

hwbm.c

net: hwbm: Fix unbalanced spinlock in error case

2016-05-25 12:35:09 -07:00

link_watch.c

…

lwtunnel.c

net: lwtunnel: Handle fragmentation

2016-08-30 22:27:18 -07:00

Makefile

net: add a hardware buffer management helper API

2016-03-14 12:19:46 -04:00

neighbour.c

neigh: allow admin to set NUD_STALE

2016-08-08 15:36:38 -07:00

net_namespace.c

netns: avoid disabling irq for netns id

2016-09-04 11:39:59 -07:00

net-procfs.c

net: remove NETDEV_TX_LOCKED support

2016-04-26 15:53:05 -04:00

net-sysfs.c

net: introduce NETDEV_CHANGE_TX_QUEUE_LEN

2016-07-01 05:32:17 -04:00

net-sysfs.h

…

net-traces.c

net: IPv6 fib lookup tracepoint

2015-11-22 11:54:10 -05:00

netclassid_cgroup.c

core: remove unneded headers for net cgroup controllers.

2016-02-17 15:31:27 -05:00

netevent.c

netevent: remove automatic variable in register_netevent_notifier()

2015-05-31 00:03:21 -07:00

netpoll.c

net: tracepoint napi:napi_poll add work and budget

2016-07-09 18:05:02 -04:00

netprio_cgroup.c

core: remove unneded headers for net cgroup controllers.

2016-02-17 15:31:27 -05:00

pktgen.c

net: pktgen: fix pkt_size

2016-10-03 01:29:57 -04:00

ptp_classifier.c

ptp: Change ptp_class to a proper bitmask

2015-11-03 11:08:22 -05:00

request_sock.c

tcp: restore fastopen operations

2015-10-05 03:19:06 -07:00

rtnetlink.c

net: Update API for VF vlan protocol 802.1ad support

2016-09-24 08:01:26 -04:00

scm.c

unix: correctly track in-flight fds in sending process user_struct

2016-02-08 10:30:42 -05:00

secure_seq.c

net: remove a sparse error in secure_dccpv6_sequence_number()

2015-05-25 22:55:37 -04:00

skbuff.c

net: skbuff: Coding: Use eth_type_vlan() instead of open coding it

2016-09-22 01:35:57 -04:00

sock_diag.c

sock_diag: align nlattr properly when needed

2016-04-26 12:00:48 -04:00

sock_reuseport.c

soreuseport: fix NULL ptr dereference SO_REUSEPORT after bind

2016-01-19 14:44:23 -05:00

sock.c

Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net

2016-09-23 06:46:57 -04:00

stream.c

net: do not export sk_stream_write_space

2016-09-28 20:32:38 -04:00

sysctl_net_core.c

bpf: add generic constant blinding for use in jits

2016-05-16 13:49:32 -04:00

timestamping.c

net: skb_defer_rx_timestamp should check for phydev before setting up classify

2015-07-09 14:17:15 -07:00

tso.c

net: tso: add support for IPv6

2015-10-26 22:24:22 -07:00

utils.c

net: the space is required before the open parenthesis '('

2016-06-29 05:15:14 -04:00