Pablo Neira e1ee3673a8 genetlink: fix usage of NLM_F_EXCL or NLM_F_REPLACE ... Currently, it is not possible to use neither NLM_F_EXCL nor NLM_F_REPLACE from genetlink. This is due to this checking in genl_family_rcv_msg: if (nlh->nlmsg_flags & NLM_F_DUMP) NLM_F_DUMP is NLM_F_MATCH|NLM_F_ROOT. Thus, if NLM_F_EXCL or NLM_F_REPLACE flag is set, genetlink believes that you're requesting a dump and it calls the .dumpit callback. The solution that I propose is to refine this checking to make it stricter: if ((nlh->nlmsg_flags & NLM_F_DUMP) == NLM_F_DUMP) And given the combination NLM_F_REPLACE and NLM_F_EXCL does not make sense to me, it removes the ambiguity. There was a patch that tried to fix this some time ago (0ab03c2 netlink: test for all flags of the NLM_F_DUMP composite) but it tried to resolve this ambiguity in *all* existing netlink subsystems, not only genetlink. That patch was reverted since it broke iproute2, which is using NLM_F_ROOT to request the dump of the routing cache. Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org> Signed-off-by: David S. Miller <davem@davemloft.net>		2013-07-30 16:43:19 -07:00
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Kconfig	netlink: kconfig: move mmap i/o into netlink kconfig	2013-05-01 15:02:42 -04:00
Makefile	netlink: Diag core and basic socket info dumping (v2)	2013-03-21 12:38:03 -04:00
af_netlink.c	netlink: fix splat in skb_clone with large messages	2013-06-27 22:44:16 -07:00
af_netlink.h	netlink: Add compare function for netlink_table	2013-06-11 02:39:42 -07:00
diag.c	netlink: Fix build with mmap disabled.	2013-04-23 15:39:03 -04:00
genetlink.c	genetlink: fix usage of NLM_F_EXCL or NLM_F_REPLACE	2013-07-30 16:43:19 -07:00