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37cb062007
linux/net
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Ying Xue 37cb062007 tipc: remove TIPC usage of field af_packet_priv in struct net_device 
TIPC is currently using the field 'af_packet_priv' in struct net_device
as a handle to find the bearer instance associated to the given network
device. But, by doing so it is blocking other networking cleanups, such
as the one discussed here:

http://patchwork.ozlabs.org/patch/178044/

This commit removes this usage from TIPC. Instead, we introduce a new
field, 'tipc_ptr', to the net_device structure, to serve this purpose.
When TIPC bearer is enabled, the bearer object is associated to
'tipc_ptr'. When a TIPC packet arrives in the recv_msg() upcall
from a networking device, the bearer object can now be obtained from
'tipc_ptr'. When a bearer is disabled, the bearer object is detached
from its underlying network device by setting 'tipc_ptr' to NULL.

Additionally, an RCU lock is used to protect the new pointer.
Henceforth, the existing tipc_net_lock is used in write mode to
serialize write accesses to this pointer, while the new RCU lock is
applied on the read side to ensure that the pointer is 100% valid
within its wrapped area for all readers.

Signed-off-by: Ying Xue <ying.xue@windriver.com>
Cc: Patrick McHardy <kaber@trash.net>
Reviewed-by: Paul Gortmaker <paul.gortmaker@windriver.com>
Signed-off-by: Jon Maloy <jon.maloy@ericsson.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
2013-12-11 00:17:42 -05:00
..
9p Nothing really exciting: some groundwork for changing virtio endian, and 2013-11-15 13:28:47 +09:00
802 neigh: convert parms to an array 2013-12-09 20:56:12 -05:00
8021q Merge branch 'core-locking-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip 2013-11-14 16:30:30 +09:00
appletalk net: rework recvmsg handler msg_name and msg_namelen logic 2013-11-20 21:52:30 -05:00
atm net: rework recvmsg handler msg_name and msg_namelen logic 2013-11-20 21:52:30 -05:00
ax25 net: rework recvmsg handler msg_name and msg_namelen logic 2013-11-20 21:52:30 -05:00
batman-adv batadv: Slight optimization of batadv_compare_eth 2013-12-09 20:58:11 -05:00
bluetooth net/*: Fix FSF address in file headers 2013-12-06 12:37:57 -05:00
bridge net: more spelling fixes 2013-12-10 21:57:11 -05:00
caif net: rework recvmsg handler msg_name and msg_namelen logic 2013-11-20 21:52:30 -05:00
can Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/jikos/trivial 2013-11-15 16:47:22 -08:00
ceph net: 8021q/bluetooth/bridge/can/ceph: Remove extern from function prototypes 2013-10-19 19:12:11 -04:00
core net: more spelling fixes 2013-12-10 21:57:11 -05:00
dcb net/*: Fix FSF address in file headers 2013-12-06 12:37:57 -05:00
dccp ipv4: introduce new IP_MTU_DISCOVER mode IP_PMTUDISC_INTERFACE 2013-11-05 21:52:27 -05:00
decnet dn_dev: add support for IFA_FLAGS nl attribute 2013-12-10 21:50:00 -05:00
dns_resolver net/*: Fix FSF address in file headers 2013-12-06 12:37:57 -05:00
dsa net: dsa: inherit addr_assign_type along with dev_addr 2013-09-03 20:57:49 -04:00
ethernet ethernet: use likely() for common Ethernet encap 2013-09-30 21:52:53 -07:00
hsr net/hsr: Support iproute print_opt ('ip -details ...') 2013-11-30 12:48:14 -05:00
ieee802154 genetlink: make multicast groups const, prevent abuse 2013-11-19 16:39:06 -05:00
ipv4 net: more spelling fixes 2013-12-10 21:57:11 -05:00
ipv6 ipv6 addrconf: revert /proc/net/if_inet6 ifa_flag format 2013-12-10 17:47:18 -05:00
ipx net: rework recvmsg handler msg_name and msg_namelen logic 2013-11-20 21:52:30 -05:00
irda net/irda: Fix FSF address in file headers 2013-12-06 12:37:57 -05:00
iucv net: rework recvmsg handler msg_name and msg_namelen logic 2013-11-20 21:52:30 -05:00
key net: rework recvmsg handler msg_name and msg_namelen logic 2013-11-20 21:52:30 -05:00
l2tp inet: fix addr_len/msg->msg_namelen assignment in recv_error and rxpmtu functions 2013-11-23 14:46:23 -08:00
lapb net/lapb: re-send packets on timeout 2013-09-23 16:52:45 -04:00
llc net: rework recvmsg handler msg_name and msg_namelen logic 2013-11-20 21:52:30 -05:00
mac80211 Merge branch 'master' of git://git.kernel.org/pub/scm/linux/kernel/git/linville/wireless 2013-12-06 09:50:45 -05:00
mac802154 6lowpan: set and use mac_len for mac header length 2013-10-30 17:18:46 -04:00
mpls ipip: add GSO/TSO support 2013-10-19 19:36:19 -04:00
netfilter netfilter: Fix FSF address in file headers 2013-12-06 12:37:57 -05:00
netlabel netlabel: Fix FSF address in file headers 2013-12-06 12:37:56 -05:00
netlink genetlink/pmcraid: use proper genetlink multicast API 2013-11-28 18:26:30 -05:00
netrom net: rework recvmsg handler msg_name and msg_namelen logic 2013-11-20 21:52:30 -05:00
nfc net: rework recvmsg handler msg_name and msg_namelen logic 2013-11-20 21:52:30 -05:00
openvswitch Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net 2013-11-19 15:50:47 -08:00
packet packet: introduce PACKET_QDISC_BYPASS socket option 2013-12-09 20:23:33 -05:00
phonet Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net 2013-11-19 15:50:47 -08:00
rds rds: prevent BUG_ON triggered on congestion update to loopback 2013-12-03 11:54:18 -05:00
rfkill net: rfkill: gpio: add ACPI support 2013-10-28 15:05:25 +01:00
rose net: rework recvmsg handler msg_name and msg_namelen logic 2013-11-20 21:52:30 -05:00
rxrpc net: rework recvmsg handler msg_name and msg_namelen logic 2013-11-20 21:52:30 -05:00
sched net_sched: sfq: put sfq_unlink in a do - while loop 2013-12-10 22:44:52 -05:00
sctp Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net 2013-12-09 20:20:14 -05:00
sunrpc Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs 2013-11-20 14:25:39 -08:00
tipc tipc: remove TIPC usage of field af_packet_priv in struct net_device 2013-12-11 00:17:42 -05:00
unix unix: convert printks to pr_<level> 2013-12-06 16:35:58 -05:00
vmw_vsock net: rework recvmsg handler msg_name and msg_namelen logic 2013-11-20 21:52:30 -05:00
wimax wimax: remove dead code 2013-11-21 13:09:42 -05:00
wireless Merge branch 'master' of git://git.kernel.org/pub/scm/linux/kernel/git/linville/wireless 2013-12-06 09:50:45 -05:00
x25 x25: convert printks to pr_<level> 2013-12-09 20:24:18 -05:00
xfrm net: move pskb_put() to core code 2013-11-07 19:28:58 -05:00
compat.c net: clamp ->msg_namelen instead of returning an error 2013-11-29 16:12:52 -05:00
Kconfig kernel: remove CONFIG_USE_GENERIC_SMP_HELPERS cleanly 2013-11-21 16:42:27 -08:00
Makefile net/hsr: Add support for the High-availability Seamless Redundancy protocol (HSRv0) 2013-11-03 23:20:14 -05:00
nonet.c
socket.c net: handle error more gracefully in socketpair() 2013-12-10 22:24:13 -05:00
sysctl_net.c net: Update the sysctl permissions handler to test effective uid/gid 2013-10-07 15:57:56 -04:00