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eb608d2b99d993a4b4ee9cb70e6cf66f96bb1168
linux/include/net
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Eric Dumazet 7f50236153 ipv4: irq safe sk_dst_[re]set() and ipv4_sk_update_pmtu() fix 
We have two different ways to handle changes to sk->sk_dst

First way (used by TCP) assumes socket lock is owned by caller, and use
no extra lock : __sk_dst_set() & __sk_dst_reset()

Another way (used by UDP) uses sk_dst_lock because socket lock is not
always taken. Note that sk_dst_lock is not softirq safe.

These ways are not inter changeable for a given socket type.

ipv4_sk_update_pmtu(), added in linux-3.8, added a race, as it used
the socket lock as synchronization, but users might be UDP sockets.

Instead of converting sk_dst_lock to a softirq safe version, use xchg()
as we did for sk_rx_dst in commit e47eb5dfb2 ("udp: ipv4: do not use
sk_dst_lock from softirq context")

In a follow up patch, we probably can remove sk_dst_lock, as it is
only used in IPv6.

Signed-off-by: Eric Dumazet <edumazet@google.com>
Cc: Steffen Klassert <steffen.klassert@secunet.com>
Fixes: 9cb3a50c5f ("ipv4: Invalidate the socket cached route on pmtu events if possible")
Signed-off-by: David S. Miller <davem@davemloft.net>
2014-06-30 23:40:58 -07:00
..
9p
9pnet: p9_client->conn field is unused. Remove it.
2014-03-25 16:38:16 -05:00
bluetooth
Bluetooth: Clearly distinguish mgmt LTK type from authenticated property
2014-05-23 11:24:04 -07:00
caif
caif_hsi.h: Remove extern from function prototypes
2013-09-23 16:29:41 -04:00
irda
include/net/: Fix FSF address in file headers
2013-12-06 12:37:56 -05:00
iucv
af_iucv: fix recvmsg by replacing skb_pull() function
2013-04-08 17:16:57 -04:00
netfilter
netfilter: nf_tables: use u32 for chain use counter
2014-06-16 13:07:44 +02:00
netns
ipv4: make ip_local_reserved_ports per netns
2014-05-14 15:31:45 -04:00
nfc
NFC: Add RAW socket type support for SOCKPROTO_RAW
2014-05-20 00:06:04 +02:00
phonet
net: remove my future former mail address
2012-06-17 16:29:38 -07:00
sctp
net: sctp: migrate most recently used transport to ktime
2014-06-11 12:23:17 -07:00
tc_act
net_sched: act: hide struct tcf_common from API
2014-02-12 19:23:32 -05:00
6lowpan.h
6lowpan: include net/net_namespace.h on 6lowpan namepsace header
2014-04-20 18:18:55 -04:00
act_api.h
net_sched: act: refuse to remove bound action outside
2014-02-12 19:23:32 -05:00
addrconf.h
net: ipv6: Introduce ip6_sk_dst_hoplimit.
2014-04-30 13:31:26 -04:00
af_ieee802154.h
ieee802154: add dgram sockopts for security control
2014-05-16 17:23:41 -04:00
af_rxrpc.h
af_rxrpc.h: Remove extern from function prototypes
2013-07-31 17:50:01 -07:00
af_unix.h
af_unix: improve STREAM behavior with fragmented memory
2013-08-10 01:16:44 -07:00
af_vsock.h
vsock: Make transport the proto owner
2014-05-05 13:13:50 -04:00
ah.h
ipsec: update MAX_AH_AUTH_LEN to support sha512
2011-01-13 21:48:25 -08:00
arp.h
arp: make arp_invalidate static
2013-12-28 17:02:46 -05:00
atmclip.h
atm: clip: Use device neigh support on top of "arp_tbl".
2011-11-30 18:51:03 -05:00
ax25.h
ax25.h: Remove extern from function prototypes
2013-07-31 17:50:02 -07:00
ax88796.h
…
busy_poll.h
sched, net: Fixup busy_loop_us_clock()
2014-01-13 17:39:11 +01:00
cfg80211-wext.h
cfg80211: remove unused wext handler exports
2011-08-08 14:26:29 -04:00
cfg80211.h
Merge git://git.kernel.org/pub/scm/linux/kernel/git/jberg/mac80211-next
2014-05-22 13:58:36 -04:00
checksum.h
net: Allow csum_add to be provided in arch
2014-05-05 15:26:29 -04:00
cipso_ipv4.h
cipso: cleanup cipso_v4_translate() when !CONFIG_NETLABEL
2013-12-10 17:56:54 -05:00
cls_cgroup.h
cgroup: clean up cgroup_subsys names and initialization
2014-02-08 10:36:58 -05:00
codel.h
net: introduce reciprocal_scale helper and convert users
2014-01-21 23:17:20 -08:00
compat.h
compat.h: Remove extern from function prototypes
2013-09-20 14:49:32 -04:00
datalink.h
net: Move prototype declaration to header file include/net/datalink.h from net/ipx/af_ipx.c
2014-02-09 17:32:50 -08:00
dcbevent.h
include/net/: Fix FSF address in file headers
2013-12-06 12:37:56 -05:00
dcbnl.h
include/net/: Fix FSF address in file headers
2013-12-06 12:37:56 -05:00
dn_dev.h
dn_dev: add support for IFA_FLAGS nl attribute
2013-12-10 21:50:00 -05:00
dn_fib.h
decnet (dn*.h): Remove extern from function prototypes
2013-09-20 14:49:32 -04:00
dn_neigh.h
decnet (dn*.h): Remove extern from function prototypes
2013-09-20 14:49:32 -04:00
dn_nsp.h
decnet (dn*.h): Remove extern from function prototypes
2013-09-20 14:49:32 -04:00
dn_route.h
net: Move prototype declaration to appropriate header file from decnet/af_decnet.c
2014-02-09 17:32:49 -08:00
dn.h
net: Move prototype declaration to header file include/net/dn.h from net/decnet/af_decnet.c
2014-02-09 17:32:49 -08:00
dsa.h
net: dsa: add ds_to_priv
2014-04-30 13:31:25 -04:00
dsfield.h
ipv6: Optimize ipv6_change_dsfield().
2013-01-09 23:59:53 -08:00
dst_ops.h
net: Fix warnings in dst_ops.h
2012-07-19 10:43:03 -07:00
dst.h
ipv4: add a sock pointer to dst->output() path.
2014-04-15 13:47:15 -04:00
esp.h
net: move pskb_put() to core code
2013-11-07 19:28:58 -05:00
ethoc.h
net: ethoc: set up MII management bus clock
2014-02-04 20:19:51 -08:00
fib_rules.h
fib_rules.h: Remove extern from function prototypes
2013-09-20 14:49:33 -04:00
firewire.h
firewire net, ipv4 arp: Extend hardware address and remove driver-level packet inspection.
2013-03-26 12:32:13 -04:00
flow_keys.h
flow_dissector: factor out the ports extraction in skb_flow_get_ports
2013-10-03 15:36:37 -04:00
flow.h
ipv4, fib: pass LOOPBACK_IFINDEX instead of 0 to flowi4_iif
2014-04-16 15:05:11 -04:00
flowcache.h
flowcache: Make flow cache name space aware
2014-02-12 07:02:11 +01:00
garp.h
garp.h: Remove extern from function prototypes
2013-09-20 14:49:33 -04:00
gen_stats.h
gen_stats.h: Remove extern from function prototypes
2013-09-20 14:49:33 -04:00
genetlink.h
genl: Add genlmsg_new_unicast() for unicast message allocation
2014-01-06 15:51:53 -08:00
gre.h
gre: Call gso_make_checksum
2014-06-04 22:46:38 -07:00
gro_cells.h
gro: Fix kcalloc argument order
2013-01-27 22:46:33 -05:00
icmp.h
icmp.h: Remove extern from function prototypes
2013-09-20 14:49:33 -04:00
ieee80211_radiotap.h
mac80211: propagate STBC / LDPC flags to radiotap
2014-02-06 09:34:58 +01:00
ieee802154_netdev.h
ieee802154, mac802154: implement devkey record option
2014-05-16 17:23:42 -04:00
ieee802154.h
ieee802154: add definitions for link-layer security and header functions
2014-05-15 15:51:42 -04:00
if_inet6.h
ipv6: move DAD and addrconf_verify processing to workqueue
2014-03-28 16:54:50 -04:00
inet6_connection_sock.h
ipv4: add a sock pointer to ip_queue_xmit()
2014-04-15 12:58:34 -04:00
inet6_hashtables.h
ipv6: split inet6_ehashfn to hash functions per compilation unit
2013-10-19 19:45:34 -04:00
inet_common.h
inet*.h: Remove extern from function prototypes
2013-09-21 14:01:38 -04:00
inet_connection_sock.h
ipv4: add a sock pointer to ip_queue_xmit()
2014-04-15 12:58:34 -04:00
inet_ecn.h
tunnel: fix RFC number in comment for INET_ECN_decapsulate()
2014-05-07 15:30:52 -04:00
inet_frag.h
inet: remove old fragmentation hash initializing
2013-10-23 17:01:41 -04:00
inet_hashtables.h
net: Use a more standard macro for INET_ADDR_COOKIE
2014-05-14 16:07:23 -04:00
inet_sock.h
net: support marking accepting TCP sockets
2014-05-13 18:35:09 -04:00
inet_timewait_sock.h
ipv6: tcp: fix flowlabel value in ACK messages send from TIME_WAIT
2014-01-17 17:56:33 -08:00
inetpeer.h
Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net
2014-06-03 23:32:12 -07:00
ip6_checksum.h
udp: Generic functions to set checksum
2014-06-04 22:46:38 -07:00
ip6_fib.h
ipv6: do not overwrite inetpeer metrics prematurely
2014-03-27 15:09:07 -04:00
ip6_route.h
Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net
2014-05-24 00:32:30 -04:00
ip6_tunnel.h
net: unify the pcpu_tstats and br_cpu_netstats as one
2014-01-04 20:10:24 -05:00
ip_fib.h
ip*.h: Remove extern from function prototypes
2013-09-21 14:01:38 -04:00
ip_tunnels.h
ipv4: add a sock pointer to dst->output() path.
2014-04-15 13:47:15 -04:00
ip_vs.h
arch: Mass conversion of smp_mb__*()
2014-04-18 14:20:48 +02:00
ip.h
inetpeer: get rid of ip_id_count
2014-06-02 11:00:41 -07:00
ipcomp.h
percpu: add __percpu sparse annotations to net
2010-02-16 23:05:38 -08:00
ipconfig.h
…
ipv6.h
inetpeer: get rid of ip_id_count
2014-06-02 11:00:41 -07:00
ipx.h
net: Move prototype declaration to header file include/net/ipx.h from net/ipx/af_ipx.c
2014-02-09 17:32:50 -08:00
iw_handler.h
iw_handler.h: Remove extern from function prototypes
2013-09-21 14:01:39 -04:00
lapb.h
lapb.h: Remove extern from function prototypes
2013-09-21 14:01:38 -04:00
lib80211.h
hostap: Don't use create_proc_read_entry()
2013-04-29 15:41:56 -04:00
llc_c_ac.h
llc*.h: Remove extern from function prototypes
2013-09-21 14:01:38 -04:00
llc_c_ev.h
llc*.h: Remove extern from function prototypes
2013-09-21 14:01:38 -04:00
llc_c_st.h
…
llc_conn.h
llc*.h: Remove extern from function prototypes
2013-09-21 14:01:38 -04:00
llc_if.h
llc*.h: Remove extern from function prototypes
2013-09-21 14:01:38 -04:00
llc_pdu.h
net: llc: fix order of evaluation in llc_conn_ac_inc_vr_by_1
2014-01-01 22:22:43 -05:00
llc_s_ac.h
llc*.h: Remove extern from function prototypes
2013-09-21 14:01:38 -04:00
llc_s_ev.h
llc*.h: Remove extern from function prototypes
2013-09-21 14:01:38 -04:00
llc_s_st.h
…
llc_sap.h
llc*.h: Remove extern from function prototypes
2013-09-21 14:01:38 -04:00
llc.h
llc: make lock static
2014-01-03 20:56:48 -05:00
mac80211.h
mac80211: add a single-transaction driver op to switch contexts
2014-05-26 11:04:41 +02:00
mac802154.h
ieee802154: add header structs with endiannes and operations
2014-03-14 22:15:26 -04:00
mip6.h
include/net/: Fix FSF address in file headers
2013-12-06 12:37:56 -05:00
mld.h
net: ipv6: mld: get rid of MLDV2_MRC and simplify calculation
2013-09-04 14:53:20 -04:00
mrp.h
Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net
2013-10-01 17:06:14 -04:00
ndisc.h
ndisc.h: Remove extern from function prototypes
2013-09-21 14:01:39 -04:00
neighbour.h
neigh: use NEIGH_VAR_INIT in ndo_neigh_setup functions.
2014-01-16 11:31:58 -08:00
net_namespace.h
6lowpan: nuke net_ieee802154_lowpan() accessor when 6lowpan is disabled
2014-04-24 12:36:00 -04:00
net_ratelimit.h
net: Kill ratelimit.h dependency in linux/net.h
2011-05-27 13:41:33 -04:00
netdma.h
…
netevent.h
netevent/netlink.h: Remove extern from function prototypes
2013-09-21 14:01:39 -04:00
netlabel.h
Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net-next
2014-01-25 11:17:34 -08:00
netlink.h
netevent/netlink.h: Remove extern from function prototypes
2013-09-21 14:01:39 -04:00
netprio_cgroup.h
cgroup: clean up cgroup_subsys names and initialization
2014-02-08 10:36:58 -05:00
netrom.h
netrom.h: Remove extern from function prototypes
2013-09-21 14:01:39 -04:00
nexthop.h
…
nl802154.h
ieee802154: use ieee802154_addr instead of *_sa variants
2014-03-14 22:15:26 -04:00
p8022.h
p8022.h: Remove extern from function prototypes
2013-09-21 14:01:39 -04:00
ping.h
ipv6: make IPV6_RECVPKTINFO work for ipv4 datagrams
2014-01-19 19:53:18 -08:00
pkt_cls.h
sched, cls: check if we could overwrite actions when changing a filter
2014-04-27 23:42:39 -04:00
pkt_sched.h
net_sched: drr: warn when qdisc is not work conserving
2014-06-11 15:50:59 -07:00
protocol.h
net: Eliminate no_check from protosw
2014-05-23 16:28:53 -04:00
psnap.h
psnap.h: Remove extern from function prototypes
2013-09-23 01:51:08 -04:00
raw.h
raw/rawv6.h: Remove extern from function prototypes
2013-09-23 01:51:08 -04:00
rawv6.h
raw/rawv6.h: Remove extern from function prototypes
2013-09-23 01:51:08 -04:00
red.h
reciprocal_divide: update/correction of the algorithm
2014-01-21 23:17:20 -08:00
regulatory.h
cfg80211: Enable GO operation on additional channels
2014-04-09 10:55:34 +02:00
request_sock.h
inet: includes a sock_common in request_sock
2013-10-10 00:08:07 -04:00
rose.h
rose.h: Remove extern from function prototypes
2013-09-23 01:51:08 -04:00
route.h
ipv4: remove ip_rt_dump from route.c
2014-03-24 12:45:01 -04:00
rtnetlink.h
rtnl: make ifla_policy static
2014-02-18 18:15:42 -05:00
sch_generic.h
sched, cls: check if we could overwrite actions when changing a filter
2014-04-27 23:42:39 -04:00
scm.h
scm.h: Remove extern from function prototypes
2013-09-23 01:51:09 -04:00
secure_seq.h
inetpeer: get rid of ip_id_count
2014-06-02 11:00:41 -07:00
slhc_vj.h
…
snmp.h
net: clean up snmp stats code
2014-05-07 16:06:05 -04:00
sock.h
ipv4: irq safe sk_dst_[re]set() and ipv4_sk_update_pmtu() fix
2014-06-30 23:40:58 -07:00
Space.h
drivers: net: Include new header file in sbni.c
2013-12-19 18:51:20 -05:00
stp.h
stp.h: Remove extern from function prototypes
2013-09-23 01:51:09 -04:00
tcp_memcontrol.h
tcp_memcontrol: Kill struct tcp_memcontrol
2013-10-21 18:43:02 -04:00
tcp_states.h
…
tcp.h
tcp: add gfp parameter to tcp_fragment
2014-06-10 22:30:58 -07:00
timewait_sock.h
[PATCH] tcp: Cache inetpeer in timewait socket, and only when necessary.
2012-06-09 14:56:12 -07:00
transp_v6.h
ipv6: make IPV6_RECVPKTINFO work for ipv4 datagrams
2014-01-19 19:53:18 -08:00
tso.h
net: Add a software TSO helper API
2014-05-22 14:57:15 -04:00
udp.h
udp: call __skb_checksum_complete when doing full checksum
2014-06-15 01:00:49 -07:00
udplite.h
udplite.h: Remove extern from function prototypes
2013-09-23 16:29:40 -04:00
vsock_addr.h
VSOCK: Move af_vsock.h and vsock_addr.h to include/net
2013-07-27 22:14:06 -07:00
vxlan.h
vxlan: Add support for UDP checksums (v4 sending, v6 zero csums)
2014-06-04 22:46:39 -07:00
wext.h
wext.h: Remove extern from function prototypes
2013-09-23 16:29:40 -04:00
wimax.h
wimax: Spelling s/than/that/, wording s/destinatary/recipient/
2014-05-05 15:37:55 +02:00
wpan-phy.h
ieee802154: add netlink APIs for smartMAC configuration
2014-02-17 16:42:39 -05:00
x25.h
x25.h: Remove extern from function prototypes
2013-09-23 16:29:41 -04:00
x25device.h
X25: Add if_x25.h and x25 to device identifiers
2010-04-22 16:12:36 -07:00
xfrm.h
xfrm: Remove useless xfrm_audit struct.
2014-04-23 08:21:04 +02:00