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24d71b9232
linux/net/batman-adv
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Sven Eckelmann 24d71b9232 batman-adv: Add inconsistent claim netlink dump detection 
The netlink dump functionality transfers a large number of entries from the
kernel to userspace. It is rather likely that the transfer has to
interrupted and later continued. During that time, it can happen that
either new entries are added or removed. The userspace could than either
receive some entries multiple times or miss entries.

Commit 670dc2833d ("netlink: advertise incomplete dumps") introduced a
mechanism to inform userspace about this problem. Userspace can then decide
whether it is necessary or not to retry dumping the information again.

The netlink dump functions have to be switched to exclusive locks to avoid
changes while the current message is prepared. The already existing
generation sequence counter from the hash helper can be used for this
simple hash.

Reported-by: Matthias Schiffer <mschiffer@universe-factory.net>
Signed-off-by: Sven Eckelmann <sven@narfation.org>
Signed-off-by: Simon Wunderlich <sw@simonwunderlich.de>
2018-11-12 10:41:51 +01:00
..
bat_algo.c batman-adv: Update copyright years for 2018 2018-02-26 17:57:39 +01:00
bat_algo.h batman-adv: Update copyright years for 2018 2018-02-26 17:57:39 +01:00
bat_iv_ogm.c batman-adv: Add inconsistent gateway netlink dump detection 2018-11-12 10:41:51 +01:00
bat_iv_ogm.h batman-adv: Unify include guards style 2018-07-07 22:02:17 +02:00
bat_v_elp.c batman-adv: fix hardif_neigh refcount on queue_work() failure 2018-09-07 08:14:26 +02:00
bat_v_elp.h batman-adv: Update copyright years for 2018 2018-02-26 17:57:39 +01:00
bat_v_ogm.c batman-adv: Update copyright years for 2018 2018-02-26 17:57:39 +01:00
bat_v_ogm.h batman-adv: Unify include guards style 2018-07-07 22:02:17 +02:00
bat_v.c batman-adv: Add inconsistent gateway netlink dump detection 2018-11-12 10:41:51 +01:00
bat_v.h batman-adv: Update copyright years for 2018 2018-02-26 17:57:39 +01:00
bitarray.c batman-adv: Update copyright years for 2018 2018-02-26 17:57:39 +01:00
bitarray.h batman-adv: Update copyright years for 2018 2018-02-26 17:57:39 +01:00
bridge_loop_avoidance.c batman-adv: Add inconsistent claim netlink dump detection 2018-11-12 10:41:51 +01:00
bridge_loop_avoidance.h batman-adv: Update copyright years for 2018 2018-02-26 17:57:39 +01:00
debugfs.c batman-adv: Add includes for deprecation warning 2018-11-12 10:41:50 +01:00
debugfs.h batman-adv: Mark debugfs functionality as deprecated 2018-09-14 10:50:26 +02:00
distributed-arp-table.c Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net 2018-03-23 11:31:58 -04:00
distributed-arp-table.h batman-adv: add DAT cache netlink support 2018-03-14 10:15:08 +01:00
fragmentation.c Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net 2018-03-06 01:20:46 -05:00
fragmentation.h batman-adv: Update copyright years for 2018 2018-02-26 17:57:39 +01:00
gateway_client.c batman-adv: Add inconsistent gateway netlink dump detection 2018-11-12 10:41:51 +01:00
gateway_client.h batman-adv: Update copyright years for 2018 2018-02-26 17:57:39 +01:00
gateway_common.c batman-adv: Update copyright years for 2018 2018-02-26 17:57:39 +01:00
gateway_common.h batman-adv: Update copyright years for 2018 2018-02-26 17:57:39 +01:00
hard-interface.c batman-adv: Add inconsistent hardif netlink dump detection 2018-11-12 10:41:51 +01:00
hard-interface.h batman-adv: Update copyright years for 2018 2018-02-26 17:57:39 +01:00
hash.c batman-adv: Store modification counter via hash helpers 2018-11-12 10:41:51 +01:00
hash.h batman-adv: Store modification counter via hash helpers 2018-11-12 10:41:51 +01:00
icmp_socket.c batman-adv: Mark debugfs functionality as deprecated 2018-09-14 10:50:26 +02:00
icmp_socket.h batman-adv: Update copyright years for 2018 2018-02-26 17:57:39 +01:00
Kconfig batman-adv: Fix description for BATMAN_ADV_DEBUG 2018-11-12 10:41:50 +01:00
log.c batman-adv: Allow to use BATMAN_ADV_DEBUG without BATMAN_ADV_DEBUGFS 2018-11-12 10:41:50 +01:00
log.h batman-adv: Update copyright years for 2018 2018-02-26 17:57:39 +01:00
main.c batman-adv: Add inconsistent hardif netlink dump detection 2018-11-12 10:41:51 +01:00
main.h batman-adv: Add inconsistent hardif netlink dump detection 2018-11-12 10:41:51 +01:00
Makefile batman-adv: Provide debug messages as trace events 2018-09-15 09:51:08 +02:00
multicast.c Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net 2018-05-26 19:46:15 -04:00
multicast.h batman-adv: add multicast flags netlink support 2018-03-14 10:15:34 +01:00
netlink.c batman-adv: Add inconsistent hardif netlink dump detection 2018-11-12 10:41:51 +01:00
netlink.h batman-adv: Update copyright years for 2018 2018-02-26 17:57:39 +01:00
network-coding.c batman-adv: Prevent duplicated nc_node entry 2018-09-06 13:55:58 +02:00
network-coding.h batman-adv: Update copyright years for 2018 2018-02-26 17:57:39 +01:00
originator.c batman-adv: Move OGM rebroadcast stats to orig_ifinfo 2018-09-15 09:51:10 +02:00
originator.h batman-adv: Move OGM rebroadcast stats to orig_ifinfo 2018-09-15 09:51:10 +02:00
routing.c Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net 2018-03-23 11:31:58 -04:00
routing.h batman-adv: Update copyright years for 2018 2018-02-26 17:57:39 +01:00
send.c batman-adv: Update copyright years for 2018 2018-02-26 17:57:39 +01:00
send.h batman-adv: Update copyright years for 2018 2018-02-26 17:57:39 +01:00
soft-interface.c Merge ra.kernel.org:/pub/scm/linux/kernel/git/davem/net 2018-09-25 10:35:29 -07:00
soft-interface.h batman-adv: Update copyright years for 2018 2018-02-26 17:57:39 +01:00
sysfs.c batman-adv: Fix segfault when writing to sysfs elp_interval 2018-09-06 13:54:48 +02:00
sysfs.h batman-adv: Update copyright years for 2018 2018-02-26 17:57:39 +01:00
tp_meter.c batman-adv: Update copyright years for 2018 2018-02-26 17:57:39 +01:00
tp_meter.h batman-adv: Update copyright years for 2018 2018-02-26 17:57:39 +01:00
trace.c batman-adv: Improve includes for trace functionality 2018-11-12 10:41:50 +01:00
trace.h batman-adv: Improve includes for trace functionality 2018-11-12 10:41:50 +01:00
translation-table.c batman-adv: Prevent duplicated global TT entry 2018-09-06 14:37:12 +02:00
translation-table.h batman-adv: Update copyright years for 2018 2018-02-26 17:57:39 +01:00
tvlv.c batman-adv: Prevent duplicated tvlv handler 2018-09-06 14:37:13 +02:00
tvlv.h batman-adv: Update copyright years for 2018 2018-02-26 17:57:39 +01:00
types.h batman-adv: Add inconsistent gateway netlink dump detection 2018-11-12 10:41:51 +01:00