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Tom Herbert 5a21232983 net: Support for csum_bad in skbuff 
This flag indicates that an invalid checksum was detected in the
packet. __skb_mark_checksum_bad helper function was added to set this.

Checksums can be marked bad from a driver or the GRO path (the latter
is implemented in this patch). csum_bad is checked in
__skb_checksum_validate_complete (i.e. calling that when ip_summed ==
CHECKSUM_NONE).

csum_bad works in conjunction with ip_summed value. In the case that
ip_summed is CHECKSUM_NONE and csum_bad is set, this implies that the
first (or next) checksum encountered in the packet is bad. When
ip_summed is CHECKSUM_UNNECESSARY, the first checksum after the last
one validated is bad. For example, if ip_summed == CHECKSUM_UNNECESSARY,
csum_level == 1, and csum_bad is set-- then the third checksum in the
packet is bad. In the normal path, the packet will be dropped when
processing the protocol layer of the bad checksum:
__skb_decr_checksum_unnecessary called twice for the good checksums
changing ip_summed to CHECKSUM_NONE so that
__skb_checksum_validate_complete is called to validate the third
checksum and that will fail since csum_bad is set.

Signed-off-by: Tom Herbert <therbert@google.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
 		2014-09-01 21:36:27 -07:00
..
6lowpan 6lowpan: Allow 6LoWPAN to be modular 2014-08-07 11:44:18 -07:00
9p 9P: remove unnecessary break after return 2014-07-15 16:27:00 -07:00
802 net: set name_assign_type in alloc_netdev() 2014-07-15 16:12:48 -07:00
8021q net: Always untag vlan-tagged traffic on input. 2014-08-11 12:16:51 -07:00
appletalk Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net 2014-07-16 14:09:34 -07:00
atm net: Pass a "more" indication down into netdev_start_xmit() code paths. 2014-09-01 17:39:55 -07:00
ax25 net: Fix use after free by removing length arg from sk_data_ready callbacks. 2014-04-11 16:15:36 -04:00
batman-adv batman-adv: Fix parameter order of hlist_add_behind 2014-08-16 19:19:08 -07:00
bluetooth Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net-next 2014-08-06 09:38:14 -07:00
bridge br_multicast: Replace rcu_assign_pointer() with RCU_INIT_POINTER() 2014-08-22 12:23:11 -07:00
caif caif: remove unnecessary break after goto 2014-07-15 16:27:01 -07:00
can can: add hash based access to single EFF frame filters 2014-05-19 09:38:24 +02:00
ceph Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/sage/ceph-client 2014-08-13 17:43:29 -06:00
core net: Support for csum_bad in skbuff 2014-09-01 21:36:27 -07:00
dcb dcbnl : Fix misleading dcb_app->priority explanation 2014-07-30 17:21:05 -07:00
dccp inet: move ipv6only in sock_common 2014-07-01 23:46:21 -07:00
decnet af_decnet: Use time_after_eq 2014-08-22 12:23:11 -07:00
dns_resolver Merge branch 'next' of git://git.kernel.org/pub/scm/linux/kernel/git/jmorris/linux-security 2014-08-06 08:06:39 -07:00
dsa net: dsa: make dsa_pack_type static 2014-09-01 20:41:45 -07:00
ethernet net: dsa: reduce number of protocol hooks 2014-08-27 22:59:39 -07:00
hsr net/hsr: Remove left-over never-true conditional code. 2014-07-11 15:04:40 -07:00
ieee802154 inet: frags: use kmem_cache for inet_frag_queue 2014-08-02 15:31:31 -07:00
ipv4 tcp: whitespace fixes 2014-09-01 18:12:45 -07:00
ipv6 tcp: syncookies: mark cookie_secret read_mostly 2014-08-27 16:30:49 -07:00
ipx net: Split sk_no_check into sk_no_check_{rx,tx} 2014-05-23 16:28:53 -04:00
irda irda: Fix rd_frame control field initialization in irlap_send_rd_frame() 2014-08-13 20:05:52 -07:00
iucv af_iucv: avoid path quiesce of severed path in shutdown() 2014-07-21 20:21:40 -07:00
key af_key: remove unnecessary break after return 2014-07-15 16:27:00 -07:00
l2tp net: use inet6_iif instead of IP6CB()->iif 2014-07-31 22:37:06 -07:00
lapb
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llc
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mac80211 mac80211: fix channel switch for chanctx-based drivers 2014-08-22 14:45:49 -07:00
mac802154 net: set name_assign_type in alloc_netdev() 2014-07-15 16:12:48 -07:00
mpls gre: Call gso_make_checksum 2014-06-04 22:46:38 -07:00
netfilter net: use reciprocal_scale() helper 2014-08-23 12:21:21 -07:00
netlabel Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net-next 2014-08-06 09:38:14 -07:00
netlink netlink: Annotate RCU locking for seq_file walker 2014-08-14 15:13:40 -07:00
netrom net: set name_assign_type in alloc_netdev() 2014-07-15 16:12:48 -07:00
nfc Merge tag 'master-2014-07-31' of git://git.kernel.org/pub/scm/linux/kernel/git/linville/wireless-next 2014-08-05 13:18:20 -07:00
openvswitch Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net 2014-08-23 11:12:08 -07:00
packet net: Pass a "more" indication down into netdev_start_xmit() code paths. 2014-09-01 17:39:55 -07:00
phonet net: set name_assign_type in alloc_netdev() 2014-07-15 16:12:48 -07:00
rds Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net-next 2014-06-12 14:27:40 -07:00
rfkill Merge git://git.kernel.org/pub/scm/linux/kernel/git/jberg/mac80211-next 2014-05-22 13:58:36 -04:00
rose net: set name_assign_type in alloc_netdev() 2014-07-15 16:12:48 -07:00
rxrpc net: remove dead code after sk_data_ready change 2014-08-22 21:08:50 -07:00
sched net: Don't keep around original SKB when we software segment GSO frames. 2014-09-01 17:39:56 -07:00
sctp sctp: Change sctp to implement csum_levels 2014-08-29 20:41:11 -07:00
sunrpc NFS client updates for Linux 3.17 2014-08-13 18:13:19 -06:00
tipc tipc: add name distributor resiliency queue 2014-09-01 17:51:48 -07:00
unix Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net-next 2014-06-12 14:27:40 -07:00
vmw_vsock vsock: Make transport the proto owner 2014-05-05 13:13:50 -04:00
wimax
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wireless Merge branch 'master' of git://git.kernel.org/pub/scm/linux/kernel/git/linville/wireless 2014-07-25 10:22:36 -04:00
x25 net: Fix use after free by removing length arg from sk_data_ready callbacks. 2014-04-11 16:15:36 -04:00
xfrm list: fix order of arguments for hlist_add_after(_rcu) 2014-08-06 18:01:24 -07:00
Kconfig 6lowpan: introduce new net/6lowpan directory 2014-07-12 01:53:30 +02:00
Makefile 6lowpan: introduce new net/6lowpan directory 2014-07-12 01:53:30 +02:00
compat.c net: sendmsg: fix NULL pointer dereference 2014-07-29 12:20:22 -07:00
nonet.c
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socket.c net-timestamp: sock_tx_timestamp() fix 2014-08-06 12:38:07 -07:00
sysctl_net.c
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