Paolo Abeni
f970bd9e3a
udp: implement memory accounting helpers ...
Avoid using the generic helpers.
Use the receive queue spin lock to protect the memory
accounting operation, both on enqueue and on dequeue.
On dequeue perform partial memory reclaiming, trying to
leave a quantum of forward allocated memory.
On enqueue use a custom helper, to allow some optimizations:
- use a plain spin_lock() variant instead of the slightly
costly spin_lock_irqsave(),
- avoid dst_force check, since the calling code has already
dropped the skb dst
- avoid orphaning the skb, since skb_steal_sock() already did
the work for us
The above needs custom memory reclaiming on shutdown, provided
by the udp_destruct_sock().
v5 -> v6:
- don't orphan the skb on enqueue
v4 -> v5:
- replace the mem_lock with the receive queue spin lock
- ensure that the bh is always allowed to enqueue at least
a skb, even if sk_rcvbuf is exceeded
v3 -> v4:
- reworked memory accunting, simplifying the schema
- provide an helper for both memory scheduling and enqueuing
v1 -> v2:
- use a udp specific destrctor to perform memory reclaiming
- remove a couple of helpers, unneeded after the above cleanup
- do not reclaim memory on dequeue if not under memory
pressure
- reworked the fwd accounting schema to avoid potential
integer overflow
Acked-by: Hannes Frederic Sowa <hannes@stressinduktion.org>
Signed-off-by: Paolo Abeni <pabeni@redhat.com>
Acked-by: Eric Dumazet <edumazet@google.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
2016-10-22 17:05:05 -04:00
9p: switch p9_client_read() to passing struct iov_iter *
2015-04-11 22:28:27 -04:00
Bluetooth: Add support for appearance in scan rsp
2016-09-19 20:19:34 +02:00
s390/iucv: do not use arrays as argument
2015-09-21 16:03:04 -07:00
netfilter: merge fixup for "nf_tables_netdev: remove redundant ip_hdr assignment"
2016-10-05 20:25:48 -04:00
Merge branch 'master' of git://git.kernel.org/pub/scm/linux/kernel/git/davem/net-next
2016-09-25 23:34:19 +02:00
NFC: digital: Add support for NFC DEP Response Waiting Time
2016-07-11 02:01:14 +02:00
sock: struct proto hash function may error
2016-02-11 03:54:14 -05:00
sctp: remove the old ttl expires policy
2016-10-13 09:44:14 -04:00
net/sched: tc_mirred: Rename public predicates 'is_tcf_mirred_redirect' and 'is_tcf_mirred_mirror'
2016-10-14 10:23:06 -04:00
6lowpan: add 802.15.4 short addr slaac
2016-06-15 20:41:22 -07:00
net_sched: convert tcf_exts from list to pointer array
2016-08-17 19:27:51 -04:00
ipv6 addrconf: implement RFC7559 router solicitation backoff
2016-09-30 01:54:28 -04:00
ieee802154: af_ieee802154: fix typo in comment.
2015-09-17 13:20:05 +02:00
rxrpc: Rewrite the data and ack handling code
2016-09-08 11:10:12 +01:00
af_unix: split 'u->readlock' into two: 'iolock' and 'bindlock'
2016-09-04 13:29:29 -07:00
VSOCK: Introduce virtio_vsock_common.ko
2016-08-02 02:57:29 +03:00
neigh: Factor out ___neigh_lookup_noref
2015-03-04 00:23:23 -05:00
ax25: Stop using sock->sk_protinfo.
2015-06-28 16:55:44 -07:00
bonding: 3ad: apply ad_actor settings changes immediately
2016-02-09 04:45:49 -05:00
bonding: convert num_grat_arp to the new bonding option API
2015-07-27 01:05:24 -07:00
bonding: quit messing with IOCTL
2016-09-27 21:15:21 -04:00
net: un-inline sk_busy_loop()
2015-11-18 16:17:38 -05:00
calipso: Add a label cache.
2016-06-27 15:06:17 -04:00
cfg80211: Provide an API to report NAN function termination
2016-09-30 13:21:37 +02:00
ieee802154: add netns support
2016-07-08 12:20:57 +02:00
csum: Update csum_block_add to use rotate instead of byteswap
2016-03-13 15:01:00 -04:00
cls_cgroup: get sk_classid only from full sockets
2016-04-19 20:09:25 -04:00
codel: split into multiple files
2016-04-25 16:44:27 -04:00
codel: split into multiple files
2016-04-25 16:44:27 -04:00
net_sched: fq_codel: cache skb->truesize into skb->cb
2016-06-25 12:19:35 -04:00
packet: compat support for sock_fprog
2016-06-09 23:41:03 -07:00
net/dcb: Add IEEE QCN attribute
2015-03-06 21:50:02 -05:00
devlink: remove unused priv_size
2016-08-26 11:55:18 -07:00
netfilter: Pass net into okfn
2015-09-17 17:18:37 -07:00
net: dsa: add port fast ageing
2016-09-23 08:38:50 -04:00
route: move lwtunnel state to a single place
2016-04-25 16:20:09 -04:00
net: add dst_cache support
2016-02-16 20:21:48 -05:00
net/dst: Utility functions to build dst_metadata without supplying an skb
2016-09-10 20:53:55 -07:00
ipv4, ipv6: Pass net into __ip_local_out and __ip6_local_out
2015-10-08 04:27:02 -07:00
net/ethoc: support big-endian register layout
2015-09-23 15:33:15 -07:00
net: Add l3mdev rule
2016-06-08 11:36:02 -07:00
net: flow: Remove FLOWI_FLAG_L3MDEV_SRC flag
2016-09-10 23:12:53 -07:00
rps: flow_dissector: Add the const for the parameter of flow_keys_have_l4
2016-09-01 16:51:08 -07:00
fou: Add encap ops for IPv6 tunnels
2016-05-20 18:03:16 -04:00
fq.h: Port memory limit mechanism from fq_codel
2016-09-30 13:29:21 +02:00
fq.h: Port memory limit mechanism from fq_codel
2016-09-30 13:29:21 +02:00
net: sched: do not acquire qdisc spinlock in qdisc/class stats dump
2016-06-07 16:37:14 -07:00
Revert "genl: Add genlmsg_new_unicast() for unicast message allocation"
2016-02-18 11:42:19 -05:00
net: Remove deprecated tunnel specific UDP offload functions
2016-06-17 20:23:32 -07:00
Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net
2016-08-18 01:17:32 -04:00
gro_cells: gro_cells_receive now return error code
2016-07-22 00:50:41 -04:00
gtp: #define #define _GTP_H_ and not #define _GTP_H
2016-07-25 17:55:43 -07:00
net: add a hardware buffer management helper API
2016-03-14 12:19:46 -04:00
net: snmp: kill STATS_BH macros
2016-04-27 22:48:25 -04:00
mac80211: add support for radiotap timestamp field
2016-09-12 11:45:45 +02:00
mac802154: constify ieee802154_llsec_ops structure
2016-01-04 20:40:41 +01:00
ipv6 addrconf: implement RFC7559 router solicitation backoff
2016-09-30 01:54:28 -04:00
ila: Add generic ILA translation facility
2015-12-15 23:25:20 -05:00
ipv6: remove unused in6_addr struct
2016-03-22 15:45:44 -04:00
tcp/dccp: do not touch listener sk_refcnt under synflood
2016-04-04 22:11:20 -04:00
ip4ip6: Support for GSO/GRO
2016-05-20 18:03:17 -04:00
tcp: increase ICSK_CA_PRIV_SIZE from 64 bytes to 88
2016-09-21 00:23:01 -04:00
ipv6: suppress sparse warnings in IP6_ECN_set_ce()
2016-08-13 15:08:00 -07:00
ipv4: namespacify ip fragment max dist sysctl knob
2016-02-16 20:42:54 -05:00
tcp/dccp: do not touch listener sk_refcnt under synflood
2016-04-04 22:11:20 -04:00
ipv6: Allow request socks to contain IPv6 options.
2016-06-27 15:05:28 -04:00
Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net
2015-10-20 06:08:27 -07:00
inet: tcp: fix inetpeer_set_addr_v4()
2015-12-16 00:14:12 -05:00
net:snmp: Introduce generic interfaces for snmp_get_cpu_field{, 64}
2016-09-30 01:50:44 -04:00
ipv6: Pass proto to csum_ipv6_magic as __u8 instead of unsigned short
2016-03-13 23:55:13 -04:00
ipv6: Check rt->dst.from for the DST_NOCACHE route
2015-11-15 17:12:37 -05:00
ipv6: Export p6_route_input_lookup symbol
2016-09-19 01:25:22 -04:00
ip6_tunnel: add collect_md mode to IPv6 tunnels
2016-09-17 10:13:07 -04:00
switchdev: remove FIB offload infrastructure
2016-09-28 04:48:00 -04:00
ip_tunnel: add collect_md mode to IPIP tunnel
2016-09-17 10:13:07 -04:00
ipvs: update real-server binding of outgoing connections in SIP-pe
2016-06-06 09:47:25 +09:00
Merge branch 'stable-4.8' of git://git.infradead.org/users/pcmoore/selinux into next
2016-07-07 10:15:34 +10:00
cfg80211/wext: fix message ordering
2016-01-29 17:13:43 +01:00
kcm: Use stream parser
2016-08-17 19:36:23 -04:00
net: ipv4: Do not drop to make_route if oif is l3mdev
2016-10-13 12:05:26 -04:00
net: Pass kern from net_proto_family.create to sk_alloc
2015-05-11 10:50:17 -04:00
lwtunnel: Add destroy state operation
2016-10-15 17:33:41 -04:00
mac80211: Move reorder-sensitive TX handlers to after TXQ dequeue
2016-09-30 14:46:57 +02:00
ieee802154: cleanup WARN_ON for fc fetch
2016-07-08 13:23:12 +02:00
openvswitch: use mpls_hdr
2016-10-03 02:00:22 -04:00
mpls: multipath route support
2015-10-23 06:26:42 -07:00
net/ncsi: Introduce ncsi_stop_dev()
2016-10-04 02:11:51 -04:00
6lowpan: introduce 6lowpan-nd
2016-06-15 20:41:23 -07:00
net: add explicit logging and stat for neighbour table overflow
2015-08-10 13:46:21 -07:00
netns: Add a limit on the number of net namespaces
2016-08-08 14:42:04 -05:00
neigh: Send a notification when DELAY_PROBE_TIME changes
2016-07-05 09:06:29 -07:00
netlabel: Implement CALIPSO config functions for SMACK.
2016-06-27 15:06:18 -04:00
netlink: kill nla_put_u64()
2016-05-16 13:46:23 -04:00
net: wrap sock->sk_cgrp_prioidx and ->sk_classid inside a struct
2015-12-08 22:02:33 -05:00
ieee802154: add netns support
2016-07-08 12:20:57 +02:00
net: ping: make ping_v6_sendmsg static
2016-03-23 22:09:58 -04:00
net/sched: pkt_cls: change tc actions order to be as the user sets
2016-09-28 05:02:44 -04:00
net: sched: convert qdisc linked list to hashtable
2016-08-10 17:19:02 -07:00
pptp: Refactor the struct and macros of PPTP codes
2016-08-15 10:55:53 -07:00
udp: Remove udp_offloads
2016-04-07 16:53:30 -04:00
sock: struct proto hash function may error
2016-02-11 03:54:14 -05:00
inet: reqsk_alloc() needs to take care of dead listeners
2016-04-04 22:11:19 -04:00
net: ipv4: Remove l3mdev_get_saddr
2016-09-10 23:12:53 -07:00
net: rtnetlink: add support for the IFLA_STATS_LINK_XSTATS_SLAVE attribute
2016-06-30 06:15:04 -04:00
sched: add and use qdisc_skb_head helpers
2016-09-19 01:47:18 -04:00
unix: correctly track in-flight fds in sending process user_struct
2016-02-08 10:30:42 -05:00
net: snmp: fix 64bit stats on 32bit arches
2016-04-28 11:49:45 -04:00
net/socket: factor out helpers for memory and queue manipulation
2016-10-22 17:05:05 -04:00
soreuseport: fix NULL ptr dereference SO_REUSEPORT after bind
2016-01-19 14:44:23 -05:00
kcm: Remove TCP specific references from kcm and strparser
2016-08-28 23:32:41 -04:00
switchdev: remove FIB offload infrastructure
2016-09-28 04:48:00 -04:00
tcp: new CC hook to set sending rate with rate_sample in any CA state
2016-09-21 00:23:01 -04:00
inet: add TCP_NEW_SYN_RECV state
2015-03-12 22:58:12 -04:00
inet: remove BUG_ON() in twsk_destructor()
2015-07-09 15:12:20 -07:00
ipv6: add new struct ipcm6_cookie
2016-05-03 16:08:14 -04:00
net: tso: add support for IPv6
2015-10-26 22:24:22 -07:00
udp: implement memory accounting helpers
2016-10-22 17:05:05 -04:00
vxlan: Add new UDP encapsulation offload type for VXLAN-GPE
2016-06-17 20:23:32 -07:00
net/ip_tunnels: Introduce tunnel_id_to_key32() and key32_to_tunnel_id()
2016-09-10 20:53:55 -07:00
Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net
2016-09-23 06:46:57 -04:00
f970bd9e3a