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3a0ed3e961
linux/include/net
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Deepa Dinamani 3a0ed3e961 sock: Make sock->sk_stamp thread-safe 
Al Viro mentioned (Message-ID
<20170626041334.GZ10672@ZenIV.linux.org.uk>)
that there is probably a race condition
lurking in accesses of sk_stamp on 32-bit machines.

sock->sk_stamp is of type ktime_t which is always an s64.
On a 32 bit architecture, we might run into situations of
unsafe access as the access to the field becomes non atomic.

Use seqlocks for synchronization.
This allows us to avoid using spinlocks for readers as
readers do not need mutual exclusion.

Another approach to solve this is to require sk_lock for all
modifications of the timestamps. The current approach allows
for timestamps to have their own lock: sk_stamp_lock.
This allows for the patch to not compete with already
existing critical sections, and side effects are limited
to the paths in the patch.

The addition of the new field maintains the data locality
optimizations from
commit 9115e8cd2a ("net: reorganize struct sock for better data
locality")

Note that all the instances of the sk_stamp accesses
are either through the ioctl or the syscall recvmsg.

Signed-off-by: Deepa Dinamani <deepa.kernel@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
2019-01-01 09:47:59 -08:00
..
9p 9p: Add refcount to p9_req_t 2018-09-08 01:39:47 +09:00
bluetooth Bluetooth: Errata Service Release 8, Erratum 3253 2018-10-14 10:25:47 +02:00
caif caif: reduce stack size with KASAN 2018-01-19 14:02:12 -05:00
iucv net/af_iucv: locate IUCV header via skb_network_header() 2018-09-26 09:56:07 -07:00
netfilter netfilter: nf_conncount: speculative garbage collection on empty lists 2018-12-29 02:45:22 +01:00
netns Merge git://git.kernel.org/pub/scm/linux/kernel/git/pablo/nf-next 2018-12-20 18:20:26 -08:00
nfc NFC: Fix the number of pipes 2018-09-18 19:55:01 -07:00
phonet proc: introduce proc_create_net{,_data} 2018-05-16 07:24:30 +02:00
sctp Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net 2018-12-09 21:43:31 -08:00
tc_act Merge ra.kernel.org:/pub/scm/linux/kernel/git/torvalds/linux 2018-07-20 21:17:12 -07:00
6lowpan.h
act_api.h net/sched: Remove egdev mechanism 2018-12-10 15:54:34 -08:00
addrconf.h net/ipv6: Add anycast addresses to a global hashtable 2018-11-02 23:54:56 -07:00
af_ieee802154.h ieee802154: add rx LQI from userspace 2018-07-13 12:18:18 -04:00
af_rxrpc.h rxrpc: Fix life check 2018-11-15 11:35:40 -08:00
af_unix.h net: drop a space before tabs 2018-10-31 12:37:12 -07:00
af_vsock.h vsock: split dwork to avoid reinitializations 2018-08-07 12:39:13 -07:00
ah.h License cleanup: add SPDX GPL-2.0 license identifier to files with no license 2017-11-02 11:10:55 +01:00
arp.h ipv4: Make neigh lookup keys for loopback/point-to-point devices be INADDR_ANY 2018-01-15 14:53:43 -05:00
atmclip.h License cleanup: add SPDX GPL-2.0 license identifier to files with no license 2017-11-02 11:10:55 +01:00
ax25.h proc: introduce proc_create_seq{,_data} 2018-05-16 07:23:35 +02:00
ax88796.h net-next: ax88796: add interrupt status callback to platform data 2018-04-19 16:11:11 -04:00
bond_3ad.h include/net/bond_3ad: Simplify the code by using the ARRAY_SIZE 2018-08-04 13:23:15 -07:00
bond_alb.h
bond_options.h
bonding.h bonding: avoid possible dead-lock 2018-09-26 20:22:19 -07:00
busy_poll.h net: remove sock_poll_busy_flag 2018-07-30 09:10:25 -07:00
calipso.h
cfg80211-wext.h
cfg80211.h cfg80211: clarify LCI/civic location documentation 2018-12-18 13:15:04 +01:00
cfg802154.h
checksum.h
cipso_ipv4.h
cls_cgroup.h
codel_impl.h
codel_qdisc.h
codel.h
compat.h net: remove compat_sys_*() prototypes from net/compat.h 2018-04-02 20:16:17 +02:00
datalink.h License cleanup: add SPDX GPL-2.0 license identifier to files with no license 2017-11-02 11:10:55 +01:00
dcbevent.h
dcbnl.h net: dcb: Add priority-to-DSCP map getters 2018-07-27 13:17:50 -07:00
devlink.h devlink: Add 'fw_load_policy' generic parameter 2018-12-03 13:55:43 -08:00
dn_dev.h License cleanup: add SPDX GPL-2.0 license identifier to files with no license 2017-11-02 11:10:55 +01:00
dn_fib.h License cleanup: add SPDX GPL-2.0 license identifier to files with no license 2017-11-02 11:10:55 +01:00
dn_neigh.h License cleanup: add SPDX GPL-2.0 license identifier to files with no license 2017-11-02 11:10:55 +01:00
dn_nsp.h net/decnet: Convert timers to use timer_setup() 2017-10-18 12:39:36 +01:00
dn_route.h decnet: Move dn_next into decnet route structure. 2017-11-30 09:54:25 -05:00
dn.h Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net 2017-11-04 09:26:51 +09:00
dsa.h net: dsa: ksz: Rename NET_DSA_TAG_KSZ to _KSZ9477 2018-12-16 14:23:33 -08:00
dsfield.h License cleanup: add SPDX GPL-2.0 license identifier to files with no license 2017-11-02 11:10:55 +01:00
dst_cache.h net: core: dst_cache_set_ip6: Rename 'addr' parameter to 'saddr' for consistency 2018-03-05 12:52:45 -05:00
dst_metadata.h Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net 2017-11-04 09:26:51 +09:00
dst_ops.h License cleanup: add SPDX GPL-2.0 license identifier to files with no license 2017-11-02 11:10:55 +01:00
dst.h geneve, vxlan: Don't set exceptions if skb->len < mtu 2018-10-17 21:51:13 -07:00
erspan.h erspan: set bso bit based on mirrored packet's len 2018-05-20 18:31:42 -04:00
esp.h License cleanup: add SPDX GPL-2.0 license identifier to files with no license 2017-11-02 11:10:55 +01:00
ethoc.h inet: whitespace cleanup 2018-02-28 11:43:28 -05:00
failover.h net: Introduce generic failover module 2018-05-28 22:59:54 -04:00
fib_notifier.h net: Add extack to fib_notifier_info 2017-11-01 11:50:43 +09:00
fib_rules.h net: fib_rules: add extack support 2018-04-23 10:21:24 -04:00
firewire.h License cleanup: add SPDX GPL-2.0 license identifier to files with no license 2017-11-02 11:10:55 +01:00
flow_dissector.h net/flow_dissector: correct comments on enum flow_dissector_key_id 2018-11-30 13:21:52 -08:00
flow.h net: reorder flowi_common fields to avoid holes 2018-11-30 17:12:39 -08:00
fou.h License cleanup: add SPDX GPL-2.0 license identifier to files with no license 2017-11-02 11:10:55 +01:00
fq_impl.h Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net 2017-10-30 21:09:24 +09:00
fq.h fq: support filtering a given tin 2017-10-11 09:49:34 +02:00
garp.h License cleanup: add SPDX GPL-2.0 license identifier to files with no license 2017-11-02 11:10:55 +01:00
gen_stats.h net: align gnet_stats_basic_cpu struct 2018-11-17 21:37:29 -08:00
genetlink.h genetlink: constify genl_err_attr() argument 2018-08-29 19:42:52 -07:00
geneve.h net: add netif_is_geneve() 2018-11-07 23:00:23 -08:00
gre.h net: Add netif_is_gretap()/netif_is_ip6gretap() 2018-12-10 15:53:04 -08:00
gro_cells.h License cleanup: add SPDX GPL-2.0 license identifier to files with no license 2017-11-02 11:10:55 +01:00
gtp.h License cleanup: add SPDX GPL-2.0 license identifier to files with no license 2017-11-02 11:10:55 +01:00
gue.h fou: fix some member types in guehdr 2017-12-11 14:10:06 -05:00
hwbm.h License cleanup: add SPDX GPL-2.0 license identifier to files with no license 2017-11-02 11:10:55 +01:00
icmp.h net: Convert protocol error handlers from void to int 2018-11-08 17:13:08 -08:00
ieee80211_radiotap.h mac80211: support reporting 0-length PSDU in radiotap 2018-09-05 10:08:25 +02:00
ieee802154_netdev.h
if_inet6.h net/ipv6: Add anycast addresses to a global hashtable 2018-11-02 23:54:56 -07:00
ife.h net: sched: ife: handle malformed tlv length 2018-04-22 21:12:00 -04:00
ila.h
inet6_connection_sock.h
inet6_hashtables.h net: allow binding socket in a VRF when there's an unbound socket 2018-11-07 16:12:38 -08:00
inet_common.h net: use indirect call wrappers at GRO transport layer 2018-12-15 13:23:02 -08:00
inet_connection_sock.h inet/connection_sock: prefer _THIS_IP_ to current_text_addr 2018-08-14 10:04:36 -07:00
inet_ecn.h inet: Refactor INET_ECN_decapsulate() 2018-10-17 17:45:07 -07:00
inet_frag.h ip: add helpers to process in-order fragments faster. 2018-08-11 17:54:18 -07:00
inet_hashtables.h net: dccp: fix kernel crash on module load 2018-12-24 15:27:56 -08:00
inet_sock.h net: ensure unbound stream socket to be chosen when not in a VRF 2018-11-07 16:12:38 -08:00
inet_timewait_sock.h net-tcp: remove useless tw_timeout field 2018-06-05 10:45:24 -04:00
inetpeer.h License cleanup: add SPDX GPL-2.0 license identifier to files with no license 2017-11-02 11:10:55 +01:00
ip6_checksum.h
ip6_fib.h Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net 2018-10-19 11:03:06 -07:00
ip6_route.h net: Add struct for fib dump filter 2018-10-16 00:13:12 -07:00
ip6_tunnel.h udp: Support for error handlers of tunnels with arbitrary destination port 2018-11-08 17:13:08 -08:00
ip_fib.h net: Don't return invalid table id error when dumping all families 2018-10-24 14:06:25 -07:00
ip_tunnels.h Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net 2018-12-20 11:53:36 -08:00
ip_vs.h ipvs: add assured state for conn templates 2018-07-18 11:26:40 +02:00
ip.h ip: factor out protocol delivery helper 2018-11-07 16:23:05 -08:00
ipcomp.h License cleanup: add SPDX GPL-2.0 license identifier to files with no license 2017-11-02 11:10:55 +01:00
ipconfig.h License cleanup: add SPDX GPL-2.0 license identifier to files with no license 2017-11-02 11:10:55 +01:00
ipv6_frag.h ipv6: remove dependency of nf_defrag_ipv6 on ipv6 module 2018-07-18 11:26:53 +02:00
ipv6.h ipv6: factor out protocol delivery helper 2018-11-07 16:23:05 -08:00
ipx.h License cleanup: add SPDX GPL-2.0 license identifier to files with no license 2017-11-02 11:10:55 +01:00
iw_handler.h net: Spelling s/stucture/structure/ 2018-03-27 09:51:23 +02:00
kcm.h
l3mdev.h l3mdev: add function to retreive upper master 2018-12-03 14:15:26 -08:00
lag.h net: Add lag.h, net_lag_port_dev_txable() 2018-07-11 23:10:19 -07:00
lapb.h License cleanup: add SPDX GPL-2.0 license identifier to files with no license 2017-11-02 11:10:55 +01:00
lib80211.h License cleanup: add SPDX GPL-2.0 license identifier to files with no license 2017-11-02 11:10:55 +01:00
llc_c_ac.h net: LLC: Convert timers to use timer_setup() 2017-10-25 12:06:25 +09:00
llc_c_ev.h
llc_c_st.h
llc_conn.h llc: delete timers synchronously in llc_sk_free() 2018-04-22 14:55:03 -04:00
llc_if.h
llc_pdu.h
llc_s_ac.h
llc_s_ev.h
llc_s_st.h
llc_sap.h
llc.h llc: avoid blocking in llc_sap_close() 2018-09-13 09:04:58 -07:00
lwtunnel.h net: Move ipv4 set_lwt_redirect helper to lwtunnel 2018-02-14 14:43:32 -05:00
mac80211.h mac80211: propagate the support for TWT to the driver 2018-12-18 14:18:49 +01:00
mac802154.h
mip6.h
mld.h License cleanup: add SPDX GPL-2.0 license identifier to files with no license 2017-11-02 11:10:55 +01:00
mpls_iptunnel.h
mpls.h
mrp.h License cleanup: add SPDX GPL-2.0 license identifier to files with no license 2017-11-02 11:10:55 +01:00
ncsi.h License cleanup: add SPDX GPL-2.0 license identifier to files with no license 2017-11-02 11:10:55 +01:00
ndisc.h License cleanup: add SPDX GPL-2.0 license identifier to files with no license 2017-11-02 11:10:55 +01:00
neighbour.h neighbour: register rtnl doit handler 2018-12-19 13:37:34 -08:00
net_failover.h net: Introduce net_failover driver 2018-05-28 22:59:54 -04:00
net_namespace.h flow_dissector: implements flow dissector BPF hook 2018-09-14 12:04:33 -07:00
net_ratelimit.h License cleanup: add SPDX GPL-2.0 license identifier to files with no license 2017-11-02 11:10:55 +01:00
netevent.h net: ipv4: Notify about changes to ip_forward_update_priority 2018-08-01 09:52:30 -07:00
netlabel.h
netlink.h netlink: replace __NLA_ENSURE implementation 2018-10-12 11:00:22 -07:00
netprio_cgroup.h
netrom.h proc: introduce proc_create_seq{,_data} 2018-05-16 07:23:35 +02:00
nexthop.h net: fix rtnh_ok() 2018-04-07 22:32:31 -04:00
nl802154.h
nsh.h openvswitch: enable NSH support 2017-11-08 16:12:33 +09:00
p8022.h License cleanup: add SPDX GPL-2.0 license identifier to files with no license 2017-11-02 11:10:55 +01:00
page_pool.h xdp: introduce xdp_return_frame_rx_napi 2018-05-24 18:36:15 -07:00
ping.h ipv{4,6}/ping: simplify proc file creation 2018-05-16 07:23:35 +02:00
pkt_cls.h net_sched: fold tcf_block_cb_call() into tc_setup_cb_call() 2018-12-14 15:32:19 -08:00
pkt_sched.h net: sched: extend Qdisc with rcu 2018-09-25 20:17:35 -07:00
pptp.h License cleanup: add SPDX GPL-2.0 license identifier to files with no license 2017-11-02 11:10:55 +01:00
protocol.h net: Convert protocol error handlers from void to int 2018-11-08 17:13:08 -08:00
psample.h License cleanup: add SPDX GPL-2.0 license identifier to files with no license 2017-11-02 11:10:55 +01:00
psnap.h License cleanup: add SPDX GPL-2.0 license identifier to files with no license 2017-11-02 11:10:55 +01:00
raw.h net: fix raw socket lookup device bind matching with VRFs 2018-11-07 16:12:39 -08:00
rawv6.h License cleanup: add SPDX GPL-2.0 license identifier to files with no license 2017-11-02 11:10:55 +01:00
red.h net_sched: red: Avoid illegal values 2017-12-05 14:37:13 -05:00
regulatory.h cfg80211: make wmm_rule part of the reg_rule structure 2018-08-28 11:11:47 +02:00
request_sock.h tcp: socket option to set TCP fast open key 2017-10-20 13:21:36 +01:00
rose.h proc: introduce proc_create_seq{,_data} 2018-05-16 07:23:35 +02:00
route.h net-ipv4: remove 2 always zero parameters from ipv4_redirect() 2018-09-26 20:30:55 -07:00
rsi_91x.h Bluetooth: btrsi: add new rsi bluetooth driver 2018-03-13 18:37:02 +02:00
rtnetlink.h net: Add extack argument to rtnl_create_link 2018-11-06 15:00:45 -08:00
sch_generic.h net: sched: register callbacks for indirect tc block binds 2018-11-11 09:54:52 -08:00
scm.h pids: Compute task_tgid using signal->leader_pid 2018-07-21 10:43:12 -05:00
secure_seq.h License cleanup: add SPDX GPL-2.0 license identifier to files with no license 2017-11-02 11:10:55 +01:00
seg6_hmac.h rhashtable: split rhashtable.h 2018-06-22 13:43:27 +09:00
seg6_local.h bpf: add End.DT6 action to bpf_lwt_seg6_action helper 2018-07-31 09:22:48 +02:00
seg6.h net: seg6.h: remove an unused #include 2018-12-20 16:56:04 -08:00
slhc_vj.h slip: Check if rstate is initialized before uncompressing 2018-04-11 10:33:46 -04:00
smc.h net/smc: add pnetid support for SMC-D and ISM 2018-06-30 20:42:25 +09:00
snmp.h
sock_reuseport.h bpf: Enable BPF_PROG_TYPE_SK_REUSEPORT bpf prog in reuseport selection 2018-08-11 01:58:46 +02:00
sock.h sock: Make sock->sk_stamp thread-safe 2019-01-01 09:47:59 -08:00
Space.h net/mac89x0: Convert to platform_driver 2018-03-01 21:21:36 -05:00
stp.h License cleanup: add SPDX GPL-2.0 license identifier to files with no license 2017-11-02 11:10:55 +01:00
strparser.h strparser: Add __strp_unpause and use it in ktls. 2018-06-06 14:07:53 -04:00
switchdev.h net: switchdev: Add extack to switchdev_handle_port_obj_add() callback 2018-12-12 16:34:22 -08:00
tcp_states.h tcp: remove the hardcode in the definition of TCPF Macro 2018-02-21 15:06:05 -05:00
tcp.h tcp: reduce POLLOUT events caused by TCP_NOTSENT_LOWAT 2018-12-04 21:21:18 -08:00
timewait_sock.h
tipc.h flow_dissector: do not rely on implicit casts 2018-05-08 00:02:41 -04:00
tls.h Merge git://git.kernel.org/pub/scm/linux/kernel/git/bpf/bpf-next 2018-12-20 17:31:36 -08:00
transp_v6.h ipv6: fold sockcm_cookie into ipcm6_cookie 2018-07-07 10:58:49 +09:00
tso.h License cleanup: add SPDX GPL-2.0 license identifier to files with no license 2017-11-02 11:10:55 +01:00
tun_proto.h vxlan: factor out VXLAN-GPE next protocol 2017-08-29 15:16:52 -07:00
udp_tunnel.h udp_tunnel: add config option to bind to a device 2018-12-03 14:15:26 -08:00
udp.h net: Convert protocol error handlers from void to int 2018-11-08 17:13:08 -08:00
udplite.h udplite: fix partial checksum initialization 2018-02-16 15:57:42 -05:00
vsock_addr.h
vxlan.h vxlan: Add vxlan_fdb_clear_offload() 2018-12-07 12:59:08 -08:00
wext.h lift handling of SIOCIW... out of dev_ioctl() 2018-01-24 19:13:45 -05:00
wimax.h
x25.h License cleanup: add SPDX GPL-2.0 license identifier to files with no license 2017-11-02 11:10:55 +01:00
x25device.h License cleanup: add SPDX GPL-2.0 license identifier to files with no license 2017-11-02 11:10:55 +01:00
xdp_sock.h ethtool: don't allow disabling queues with umem installed 2018-10-05 09:31:01 +02:00
xdp.h xdp: export xdp_rxq_info_unreg_mem_model 2018-08-29 12:25:53 -07:00
xfrm.h Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net 2018-12-20 11:53:36 -08:00