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linux/include/net
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Neil Horman 3b885787ea net: Generalize socket rx gap / receive queue overflow cmsg 
Create a new socket level option to report number of queue overflows

Recently I augmented the AF_PACKET protocol to report the number of frames lost
on the socket receive queue between any two enqueued frames.  This value was
exported via a SOL_PACKET level cmsg.  AFter I completed that work it was
requested that this feature be generalized so that any datagram oriented socket
could make use of this option.  As such I've created this patch, It creates a
new SOL_SOCKET level option called SO_RXQ_OVFL, which when enabled exports a
SOL_SOCKET level cmsg that reports the nubmer of times the sk_receive_queue
overflowed between any two given frames.  It also augments the AF_PACKET
protocol to take advantage of this new feature (as it previously did not touch
sk->sk_drops, which this patch uses to record the overflow count).  Tested
successfully by me.

Notes:

1) Unlike my previous patch, this patch simply records the sk_drops value, which
is not a number of drops between packets, but rather a total number of drops.
Deltas must be computed in user space.

2) While this patch currently works with datagram oriented protocols, it will
also be accepted by non-datagram oriented protocols. I'm not sure if thats
agreeable to everyone, but my argument in favor of doing so is that, for those
protocols which aren't applicable to this option, sk_drops will always be zero,
and reporting no drops on a receive queue that isn't used for those
non-participating protocols seems reasonable to me.  This also saves us having
to code in a per-protocol opt in mechanism.

3) This applies cleanly to net-next assuming that commit
977750076d (my af packet cmsg patch) is reverted

Signed-off-by: Neil Horman <nhorman@tuxdriver.com>
Signed-off-by: Eric Dumazet <eric.dumazet@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
2009-10-12 13:26:31 -07:00
..
9p 9p: Add fscache support to 9p 2009-09-23 13:03:46 -05:00
bluetooth net: mark net_proto_ops as const 2009-10-07 01:10:46 -07:00
irda net: mark read-only arrays as const 2009-08-05 10:42:58 -07:00
iucv af_iucv: Return -EAGAIN if iucv msg limit is exceeded 2009-06-19 00:10:40 -07:00
netfilter Merge branch 'master' of git://git.kernel.org/pub/scm/linux/kernel/git/kaber/nf-next-2.6 2009-09-10 18:17:09 -07:00
netns netns: embed ip6_dst_ops directly 2009-09-01 17:40:31 -07:00
phonet Phonet: sockets list through proc_fs 2009-07-23 17:58:19 -07:00
sctp net: Make setsockopt() optlen be unsigned. 2009-09-30 16:12:20 -07:00
tc_act pkt_action: add new action skbedit 2008-09-12 16:30:20 -07:00
tipc
act_api.h net: restore gnet_stats_basic to previous definition 2009-08-17 21:33:49 -07:00
addrconf.h bonding: remap muticast addresses without using dev_close() and dev_open() 2009-09-15 02:37:40 -07:00
af_ieee802154.h af_ieee802154: add support for WANT_ACK socket option 2009-08-12 21:54:50 -07:00
af_rxrpc.h
af_unix.h net: Fix soft lockups/OOM issues w/ unix garbage collector 2008-11-26 15:32:27 -08:00
ah.h
arp.h net: make neigh_ops constant 2009-09-01 17:40:57 -07:00
atmclip.h clip: convert to internal network_device_stats 2009-01-21 14:01:59 -08:00
ax25.h
ax88796.h ax88796: Add method to take MAC from platform data 2009-03-24 23:32:03 -07:00
cfg80211.h cfg80211: add firmware and hardware version to wiphy 2009-10-07 16:39:46 -04:00
checksum.h include/net net/ - csum_partial - remove unnecessary casts 2008-11-19 15:44:53 -08:00
cipso_ipv4.h netlabel: Label incoming TCP connections correctly in SELinux 2009-03-28 15:01:36 +11:00
compat.h net: Make setsockopt() optlen be unsigned. 2009-09-30 16:12:20 -07:00
datalink.h
dcbnl.h dcbnl: Add support for setapp/getapp to netdev dcbnl_rtnl_ops 2009-09-01 01:24:30 -07:00
dn.h decnet: compile fix for removal of byteorder wrapper 2008-11-27 23:04:13 -08:00
dn_dev.h
dn_fib.h decnet: remove private wrappers of endian helpers 2008-11-27 00:12:47 -08:00
dn_neigh.h
dn_nsp.h
dn_route.h
dsa.h dsa: add switch chip cascading support 2009-03-21 19:06:54 -07:00
dsfield.h
dst.h netns: embed ip6_dst_ops directly 2009-09-01 17:40:31 -07:00
dst_ops.h netns: embed ip6_dst_ops directly 2009-09-01 17:40:31 -07:00
esp.h
ethoc.h net: Add support for the OpenCores 10/100 Mbps Ethernet MAC. 2009-03-27 00:16:21 -07:00
fib_rules.h net: Remove unused parameter from fill method in fib_rules_ops. 2009-05-20 17:26:23 -07:00
flow.h netns xfrm: lookup in netns 2008-11-25 17:35:18 -08:00
garp.h
gen_stats.h pkt_sched: gen_estimator: Dont report fake rate estimators 2009-10-07 01:07:42 -07:00
genetlink.h genetlink: make netns aware 2009-07-12 14:03:27 -07:00
icmp.h
ieee80211_radiotap.h wireless: radiotap updates 2009-03-27 20:12:52 -04:00
ieee802154.h ieee802154: move headers out of extra directory 2009-07-23 17:08:51 +04:00
ieee802154_netdev.h ieee802154: add support for channel pages from IEEE 802.15.4-2006 2009-08-19 23:08:22 +04:00
if_inet6.h ipv6: reorder struct inet6_ifaddr to remove padding on 64 bit builds 2009-03-21 13:29:05 -07:00
inet6_connection_sock.h
inet6_hashtables.h net: skb->dst accessors 2009-06-03 02:51:04 -07:00
inet_common.h
inet_connection_sock.h net: Make setsockopt() optlen be unsigned. 2009-09-30 16:12:20 -07:00
inet_ecn.h net: replace __constant_{endian} uses in net headers 2009-02-14 22:58:35 -08:00
inet_frag.h inet fragments: fix sparse warning: context imbalance 2009-02-26 23:13:35 -08:00
inet_hashtables.h net: skb->dst accessors 2009-06-03 02:51:04 -07:00
inet_sock.h Merge branch 'for-linus2' of git://git.kernel.org/pub/scm/linux/kernel/git/vegard/kmemcheck 2009-06-16 13:09:51 -07:00
inet_timewait_sock.h net: annotate inet_timewait_sock bitfields 2009-06-15 15:49:32 +02:00
inetpeer.h
ip.h net: Make setsockopt() optlen be unsigned. 2009-09-30 16:12:20 -07:00
ip6_checksum.h
ip6_fib.h xfrm: select sane defaults for xfrm[4|6] gc_thresh 2009-07-30 18:52:15 -07:00
ip6_route.h net: skb->dst accessors 2009-06-03 02:51:04 -07:00
ip6_tunnel.h
ip_fib.h ipv4: fib table algorithm performance improvement 2009-10-05 00:21:56 -07:00
ip_vs.h net: mark read-only arrays as const 2009-08-05 10:42:58 -07:00
ipcomp.h
ipconfig.h
ipip.h ipv6 sit: 6rd (IPv6 Rapid Deployment) Support. 2009-10-07 01:07:37 -07:00
ipv6.h net: Make setsockopt() optlen be unsigned. 2009-09-30 16:12:20 -07:00
ipx.h net: replace __constant_{endian} uses in net headers 2009-02-14 22:58:35 -08:00
iw_handler.h wext: refactor 2009-10-07 16:39:43 -04:00
lapb.h
lib80211.h wireless: missing include in lib80211.h 2008-11-21 11:42:55 -05:00
llc.h
llc_c_ac.h
llc_c_ev.h
llc_c_st.h
llc_conn.h
llc_if.h
llc_pdu.h
llc_s_ac.h
llc_s_ev.h
llc_s_st.h
llc_sap.h
mac80211.h mac80211: remove ieee80211_rx namespace hack 2009-08-28 14:40:29 -04:00
mip6.h
ndisc.h sysctl: remove "struct file *" argument of ->proc_handler 2009-09-24 07:21:04 -07:00
neighbour.h net: make neigh_ops constant 2009-09-01 17:40:57 -07:00
net_namespace.h wext: refactor 2009-10-07 16:39:43 -04:00
netdma.h net_dma: convert to dma_find_channel 2009-01-06 11:38:15 -07:00
netevent.h
netlabel.h netlabel: Cleanup the Smack/NetLabel code to fix incoming TCP connections 2009-03-28 15:01:37 +11:00
netlink.h netlink: constify nlmsghdr arguments 2009-08-25 16:07:40 +02:00
netrom.h netrom: convert to internal net_device_stats 2009-01-21 14:02:01 -08:00
nexthop.h
nl802154.h ieee802154: add support for channel pages from IEEE 802.15.4-2006 2009-08-19 23:08:22 +04:00
p8022.h
pkt_cls.h ematch: simpler tcf_em_unregister() 2008-11-16 23:01:49 -08:00
pkt_sched.h pkt_sched: Revert tasklet_hrtimer changes. 2009-09-01 17:59:25 -07:00
protocol.h net: constify struct inet6_protocol 2009-09-14 17:03:05 -07:00
psnap.h snap: use const for descriptor 2009-03-21 19:06:50 -07:00
raw.h
rawv6.h ipv6: Use correct data types for ICMPv6 type and code 2009-06-23 04:31:07 -07:00
red.h
regulatory.h cfg80211: clean up includes 2009-04-22 16:57:17 -04:00
request_sock.h net: Fix memory leak in the proto_register function 2008-11-21 16:45:22 -08:00
rose.h NET: ROSE: Don't use static buffer. 2009-07-26 19:11:14 -07:00
route.h net: skb->rtable accessor 2009-06-03 02:51:02 -07:00
rtnetlink.h Merge branch 'master' of git://git.kernel.org/pub/scm/linux/kernel/git/kaber/nf-next-2.6 2009-09-10 18:17:09 -07:00
sch_generic.h pkt_sched: Fix tx queue selection in tc_modify_qdisc 2009-09-15 02:53:07 -07:00
scm.h cleanup: remove unused member in scm_cookie. 2009-07-05 19:16:10 -07:00
slhc_vj.h
snmp.h snmp: add missing counters for RFC 4293 2009-04-27 02:45:02 -07:00
sock.h net: Generalize socket rx gap / receive queue overflow cmsg 2009-10-12 13:26:31 -07:00
stp.h
tcp.h net: Make setsockopt() optlen be unsigned. 2009-09-30 16:12:20 -07:00
tcp_states.h
timewait_sock.h net: Fix memory leak in the proto_register function 2008-11-21 16:45:22 -08:00
transp_v6.h inet: inet_connection_sock_af_ops const 2009-09-02 01:03:49 -07:00
udp.h udp: dynamically size hash tables at boot time 2009-10-07 22:00:22 -07:00
udplite.h udp: introduce struct udp_table and multiple spinlocks 2008-10-29 01:41:45 -07:00
wext.h wext: refactor 2009-10-07 16:39:43 -04:00
wimax.h rfkill: rewrite 2009-06-03 14:06:13 -04:00
wpan-phy.h ieee802154: add a sysfs representation of WPAN master devices 2009-08-19 23:08:20 +04:00
x25.h x25: Fix sleep from timer on socket destroy. 2009-06-16 05:40:30 -07:00
x25device.h
xfrm.h xfrm: select sane defaults for xfrm[4|6] gc_thresh 2009-07-30 18:52:15 -07:00