Marcelo Ricardo Leitner 3822a5ff4b sctp: align MTU to a word ... SCTP is a protocol that is aligned to a word (4 bytes). Thus using bare MTU can sometimes return values that are not aligned, like for loopback, which is 65536 but ipv4_mtu() limits that to 65535. This mis-alignment will cause the last non-aligned bytes to never be used and can cause issues with congestion control. So it's better to just consider a lower MTU and keep congestion control calcs saner as they are based on PMTU. Same applies to icmp frag needed messages, which is also fixed by this patch. One other effect of this is the inability to send MTU-sized packet without queueing or fragmentation and without hitting Nagle. As the check performed at sctp_packet_can_append_data(): if (chunk->skb->len + q->out_qlen >= transport->pathmtu - packet->overhead) /* Enough data queued to fill a packet */ return SCTP_XMIT_OK; with the above example of MTU, if there are no other messages queued, one cannot send a packet that just fits one packet (65532 bytes) and without causing DATA chunk fragmentation or a delay. v2: - Added WORD_TRUNC macro Signed-off-by: Marcelo Ricardo Leitner <marcelo.leitner@gmail.com> Signed-off-by: David S. Miller <davem@davemloft.net>		2016-03-20 16:31:12 -04:00
..
6lowpan	6lowpan: iphc: fix SAM/DAM bit comment	2016-03-10 19:51:29 +01:00
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	Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net-next	2016-03-19 10:05:34 -07:00
bridge	bridge: fix potential use-after-free when hook returns QUEUE or STOLEN verdict	2016-03-14 15:46:41 -04:00
caif	net: caif: fix misleading indentation	2016-03-14 13:09:50 -04:00
can	can: avoid using timeval for uapi	2015-10-13 17:42:34 +02:00
ceph	Merge branch 'linus' of git://git.kernel.org/pub/scm/linux/kernel/git/herbert/crypto-2.6	2016-03-17 11:22:54 -07:00
core	net: remove a dubious unlikely() clause	2016-03-20 16:24:07 -04:00
dcb	net/dcb: make dcbnl.c explicitly non-modular	2015-10-09 07:52:27 -07:00
dccp	tcp/dccp: remove obsolete WARN_ON() in icmp handlers	2016-03-17 21:06:40 -04:00
decnet	net: add validation for the socket syscall protocol argument	2015-12-14 16:09:30 -05:00
dns_resolver	net: dns_resolver: convert time_t to time64_t	2015-11-18 16:27:46 -05:00
dsa	net: dsa: refine netdev event notifier	2016-03-14 16:05:32 -04:00
ethernet	eth: Pull header from first fragment via eth_get_headlen	2016-02-24 13:58:05 -05:00
hsr	net/hsr: fix a warning message	2015-11-23 14:56:15 -05:00
ieee802154	ieee802154: 6lowpan: fix return of netdev notifier	2016-02-23 20:29:40 +01:00
ipv4	Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net-next	2016-03-19 10:05:34 -07:00
ipv6	Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net-next	2016-03-19 10:05:34 -07:00
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	Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net	2016-02-23 00:09:14 -05:00
l3mdev	net: l3mdev: address selection should only consider devices in L3 domain	2016-02-26 14:22:26 -05:00
lapb
llc	af_llc: fix types on llc_ui_wait_for_conn	2016-02-17 16:12:13 -05:00
mac80211	Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net	2016-03-08 12:34:12 -05:00
mac802154	Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net-next	2016-03-19 10:05:34 -07:00
mpls	mpls: autoload lwt module	2016-02-21 22:00:28 -05:00
netfilter	netfilter: nf_conntrack: consolidate lock/unlock into unlock_wait	2016-03-15 01:10:42 +01:00
netlabel	netlabel: do not initialise statics to NULL	2016-03-07 11:08:26 -05:00
netlink	nfnetlink: Revert "nfnetlink: add support for memory mapped netlink"	2016-02-18 11:42:22 -05:00
netrom
nfc	Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net-next	2016-03-19 10:05:34 -07:00
openvswitch	Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net-next	2016-03-19 10:05:34 -07:00
packet	packet: validate variable length ll headers	2016-03-09 22:13:01 -05:00
phonet	sock: struct proto hash function may error	2016-02-11 03:54:14 -05:00
rds	Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net-next	2016-03-19 10:05:34 -07:00
rfkill	Here's another round of updates for -next:	2016-03-01 17:03:27 -05:00
rose
rxrpc	Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net-next	2016-03-19 10:05:34 -07:00
sched	cls_bpf: reset class and reuse major in da	2016-03-18 19:35:21 -04:00
sctp	sctp: align MTU to a word	2016-03-20 16:31:12 -04:00
sunrpc	Merge branch 'linus' of git://git.kernel.org/pub/scm/linux/kernel/git/herbert/crypto-2.6	2016-03-17 11:22:54 -07:00
switchdev	net: ndo_fdb_dump should report -EMSGSIZE to rtnl_fdb_dump.	2016-02-26 15:04:02 -05:00
tipc	tipc: make sure IPv6 header fits in skb headroom	2016-03-14 12:23:12 -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: Fix blocking ops call in prepare_to_wait	2016-02-13 05:57:39 -05:00
wimax
wireless	Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net-next	2016-03-19 10:05:34 -07:00
x25
xfrm	ipsec: Use skcipher and ahash when probing algorithms	2016-01-27 20:36:07 +08:00
compat.c
Kconfig	net: add a hardware buffer management helper API	2016-03-14 12:19:46 -04:00
Makefile	kcm: Kernel Connection Multiplexor module	2016-03-09 16:36:14 -05:00
socket.c	net: Fix use after free in the recvmmsg exit path	2016-03-14 12:41:49 -04:00
sysctl_net.c	net: sysctl: fix a kmemleak warning	2015-10-23 06:22:08 -07:00