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cd6893fae616cb894b661a3919ecb74c8ea4c34d
linux/include/net
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Eric Dumazet cd6893fae6 ipv4: irq safe sk_dst_[re]set() and ipv4_sk_update_pmtu() fix 
[ Upstream commit 7f50236153 ]

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>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2014-07-28 08:05:59 -07:00
..
9p
Merge tag 'for-linus-3.12-merge' of git://git.kernel.org/pub/scm/linux/kernel/git/ericvh/v9fs
2013-09-11 12:34:13 -07:00
bluetooth
Bluetooth: Add quirk for disabling Delete Stored Link Key command
2014-01-04 20:10:40 +02:00
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_conntrack: reserve two bytes for nf_ct_ext->len
2014-05-31 13:20:27 -07:00
netns
ipv6: add flowlabel_consistency sysctl
2014-01-19 17:12:31 -08:00
nfc
Merge branch 'master' of git://git.kernel.org/pub/scm/linux/kernel/git/linville/wireless-next into for-davem
2014-01-17 14:43:17 -05:00
phonet
net: remove my future former mail address
2012-06-17 16:29:38 -07:00
sctp
net: sctp: cache auth_enable per endpoint
2014-05-31 13:20:34 -07:00
tc_act
include/net/: Fix FSF address in file headers
2013-12-06 12:37:56 -05:00
act_api.h
net_sched: act: export tcf_hash_search() instead of tcf_hash_lookup()
2014-01-21 14:43:16 -08:00
addrconf.h
ipv6: enable anycast addresses as source addresses for datagrams
2014-01-22 21:57:05 -08:00
af_ieee802154.h
af_ieee802154: add support for WANT_ACK socket option
2009-08-12 21:54:50 -07:00
af_rxrpc.h
af_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
2014-05-31 13:20:36 -07:00
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
ax88796: Add method to take MAC from platform data
2009-03-24 23:32:03 -07:00
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
cfg80211: add cfg80211_sched_scan_stopped_rtnl
2014-06-07 10:28:10 -07:00
checksum.h
net: checksum: fix warning in skb_checksum
2013-11-04 15:27:08 -05:00
cipso_ipv4.h
cipso: cleanup cipso_v4_translate() when !CONFIG_NETLABEL
2013-12-10 17:56:54 -05:00
cls_cgroup.h
net: net_cls: move cgroupfs classid handling into core
2014-01-03 23:41:41 +01:00
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
dsa: Include linux/if_ether.h to fix build error
2011-12-01 11:41:06 -05:00
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
net: Add utility functions to clear rxhash
2013-12-17 16:36:21 -05:00
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
net: Remove FLOWI_FLAG_CAN_SLEEP
2013-12-06 07:24:39 +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_offload: statically build GRE offloading support
2014-01-06 20:28:34 -05:00
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: add radiotap flag and handling for 5/10 MHz
2013-07-16 09:58:05 +03:00
ieee802154_netdev.h
ieee802154/nl-mac.c: make some MLME operations optional
2013-04-08 12:00:16 -04:00
ieee802154.h
6LoWPAN: add fragmentation support
2011-11-14 00:19:42 -05:00
if_inet6.h
ipv6: move DAD and addrconf_verify processing to workqueue
2014-03-28 16:54:50 -04:00
inet6_connection_sock.h
inet*.h: Remove extern from function prototypes
2013-09-21 14:01:38 -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
inet*.h: Remove extern from function prototypes
2013-09-21 14:01:38 -04:00
inet_ecn.h
net: Correct comparisons and calculations using skb->tail and skb-transport_header
2013-05-28 23:49:07 -07:00
inet_frag.h
inet: remove old fragmentation hash initializing
2013-10-23 17:01:41 -04:00
inet_hashtables.h
tcp/dccp: remove twchain
2013-10-08 23:19:24 -04:00
inet_sock.h
inet: convert inet_ehash_secret and ipv6_hash_secret to net_get_random_once
2013-10-19 19:45:35 -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
net: fix inet_getid() and ipv6_select_ident() bugs
2014-06-26 15:15:39 -04:00
ip6_checksum.h
net: fix build errors if ipv6 is disabled
2013-10-09 13:04:03 -04:00
ip6_fib.h
ipv6: remove prune parameter for fib6_clean_all
2014-01-02 03:30:35 -05:00
ip6_route.h
ipv6: Limit mtu to 65575 bytes
2014-05-31 13:20:33 -07:00
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
sit: fix panic with route cache in ip tunnels
2014-02-20 13:13:50 -05:00
ip_vs.h
netfilter: push reasm skb through instead of original frag skbs
2013-11-11 00:19:35 -05:00
ip.h
ipv6: make IPV6_RECVPKTINFO work for ipv4 datagrams
2014-01-19 19:53:18 -08:00
ipcomp.h
percpu: add __percpu sparse annotations to net
2010-02-16 23:05:38 -08:00
ipconfig.h
net: remove CVS keywords
2008-06-11 21:00:38 -07:00
ipv6.h
ipv6: protect protocols not handling ipv4 from v4 connection/bind attempts
2014-01-21 16:59:19 -08:00
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
Linux-2.6.12-rc2
2005-04-16 15:20:36 -07:00
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
Linux-2.6.12-rc2
2005-04-16 15:20:36 -07:00
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: handle MMPDUs at EOSP correctly
2014-01-10 09:50:02 +01:00
mac802154.h
mac802154: correct a typo in ieee802154_alloc_device() prototype
2013-10-21 18:56:23 -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
net: Move prototype declaration to header file include/net/net_namespace.h from net/ipx/af_ipx.c
2014-02-09 17:32:50 -08:00
net_ratelimit.h
net: Kill ratelimit.h dependency in linux/net.h
2011-05-27 13:41:33 -04:00
netdma.h
net_dma: convert to dma_find_channel
2009-01-06 11:38:15 -07:00
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
net: netprio: rename config to be more consistent with cgroup configs
2014-01-03 23:41:42 +01:00
netrom.h
netrom.h: Remove extern from function prototypes
2013-09-21 14:01:39 -04:00
nexthop.h
[IPv4]: FIB configuration using struct fib_config
2006-09-22 14:55:04 -07:00
nl802154.h
ieee802154: add support for channel pages from IEEE 802.15.4-2006
2009-08-19 23:08:22 +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
net_sched: optimize tcf_match_indev()
2014-01-13 11:50:15 -08:00
pkt_sched.h
pkt_sched: give visibility to mq slave qdiscs
2013-12-09 19:54:47 -05:00
protocol.h
net: Add GRO support for UDP encapsulating protocols
2014-01-21 18:05:04 -08:00
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: make regulatory_hint() remove REGULATORY_CUSTOM_REG
2014-01-13 14:46:58 -05:00
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: introduce ip_dst_mtu_maybe_forward and protect forwarding path against pmtu spoofing
2014-01-13 11:22:54 -08:00
rtnetlink.h
rtnetlink: provide api for getting and setting slave info
2014-01-22 21:57:05 -08:00
sch_generic.h
net_sched: add struct net pointer to tcf_proto_ops->dump
2014-01-13 11:50:14 -08:00
scm.h
scm.h: Remove extern from function prototypes
2013-09-23 01:51:09 -04:00
secure_seq.h
Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net
2013-10-01 17:06:14 -04:00
slhc_vj.h
[NET]: Remove __ARGS from include/net/slhc_vj.h
2005-07-05 15:12:04 -07:00
snmp.h
net: avoid reloads in SNMP_UPD_PO_STATS
2012-08-06 13:40:47 -07:00
sock.h
ipv4: irq safe sk_dst_[re]set() and ipv4_sk_update_pmtu() fix
2014-07-28 08:05:59 -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]: Move the TCPF_ enum to tcp_states.h
2006-01-03 13:10:57 -08:00
tcp.h
tcp: syncookies: do not use getnstimeofday()
2014-03-20 16:22:42 -04:00
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
udp.h
udp: Remove unnecessary semicolon from do{}while (0) macro
2013-11-07 02:14:33 -05:00
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
net: Add GRO support for vxlan traffic
2014-01-21 18:05:04 -08:00
wext.h
wext.h: Remove extern from function prototypes
2013-09-23 16:29:40 -04:00
wimax.h
wimax.h: Remove extern from function prototypes
2013-09-23 16:29:41 -04:00
wpan-phy.h
mac802154: monitor device support
2012-05-16 15:17:08 -04:00
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: Clone states properly on migration
2014-02-20 14:30:10 +01:00