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Pablo Neira Ayuso ff491a7334 netlink: change return-value logic of netlink_broadcast() ... Currently, netlink_broadcast() reports errors to the caller if no messages at all were delivered: 1) If, at least, one message has been delivered correctly, returns 0. 2) Otherwise, if no messages at all were delivered due to skb_clone() failure, return -ENOBUFS. 3) Otherwise, if there are no listeners, return -ESRCH. With this patch, the caller knows if the delivery of any of the messages to the listeners have failed: 1) If it fails to deliver any message (for whatever reason), return -ENOBUFS. 2) Otherwise, if all messages were delivered OK, returns 0. 3) Otherwise, if no listeners, return -ESRCH. In the current ctnetlink code and in Netfilter in general, we can add reliable logging and connection tracking event delivery by dropping the packets whose events were not successfully delivered over Netlink. Of course, this option would be settable via /proc as this approach reduces performance (in terms of filtered connections per seconds by a stateful firewall) but providing reliable logging and event delivery (for conntrackd) in return. This patch also changes some clients of netlink_broadcast() that may report ENOBUFS errors via printk. This error handling is not of any help. Instead, the userspace daemons that are listening to those netlink messages should resync themselves with the kernel-side if they hit ENOBUFS. BTW, netlink_broadcast() clients include those that call cn_netlink_send(), nlmsg_multicast() and genlmsg_multicast() since they internally call netlink_broadcast() and return its error value. Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org> Signed-off-by: David S. Miller <davem@davemloft.net>		16 years ago
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9p	net/9p: fid->fid is used uninitialized	16 years ago
802	net: replace uses of __constant_{endian}	16 years ago
8021q	net: replace uses of __constant_{endian}	16 years ago
appletalk	net: replace uses of __constant_{endian}	16 years ago
atm	lec: convert to net_device_ops	16 years ago
ax25	net: replace uses of __constant_{endian}	16 years ago
bluetooth	…
bridge	net: replace uses of __constant_{endian}	16 years ago
can	net: replace uses of __constant_{endian}	16 years ago
core	gro: Fix frag_list merging on imprecisely split packets	16 years ago
dcb	…
dccp	dccp: Debugging functions for feature negotiation	16 years ago
decnet	net: replace uses of __constant_{endian}	16 years ago
dsa	net: replace uses of __constant_{endian}	16 years ago
econet	net: replace uses of __constant_{endian}	16 years ago
ethernet	…
ipv4	Merge branch 'master' of master.kernel.org:/pub/scm/linux/kernel/git/davem/net-2.6	16 years ago
ipv6	Merge branch 'master' of master.kernel.org:/pub/scm/linux/kernel/git/davem/net-2.6	16 years ago
ipx	net: replace uses of __constant_{endian}	16 years ago
irda	net: replace uses of __constant_{endian}	16 years ago
iucv	…
key	af_key: initialize xfrm encap_oa	16 years ago
lapb	…
llc	net: replace uses of __constant_{endian}	16 years ago
mac80211	mac80211: Cancel the dynamic ps timer in ioctl_siwpower.	16 years ago
netfilter	net: Partially allow skb destructors to be used on receive path	16 years ago
netlabel	…
netlink	netlink: change return-value logic of netlink_broadcast()	16 years ago
netrom	netrom: convert to net_device_ops	16 years ago
packet	net: packet socket packet_lookup_frame fix	16 years ago
phonet	net: replace uses of __constant_{endian}	16 years ago
rfkill	…
rose	rose: convert to network_device_ops	16 years ago
rxrpc	…
sched	pkt_sched: sch_htb: Use workqueue to schedule after too many events.	16 years ago
sctp	net: replace uses of __constant_{endian}	16 years ago
sunrpc	sunrpc: fix rdma dependencies	16 years ago
tipc	…
unix	…
wanrouter	…
wimax	netlink: change return-value logic of netlink_broadcast()	16 years ago
wireless	Merge branch 'master' of git://git.kernel.org/pub/scm/linux/kernel/git/linville/wireless-next-2.6	16 years ago
x25	net: replace uses of __constant_{endian}	16 years ago
xfrm	Revert "xfrm: For 32/64 compatability wrt. xfrm_usersa_info"	16 years ago
Kconfig	Phonet: move to Networking options like other protocol stacks	16 years ago
Makefile	…
TUNABLE	…
compat.c	…
nonet.c	…
socket.c	[CVE-2009-0029] System call wrappers part 22	16 years ago
sysctl_net.c	…