Andrey Vagin b44d211e16 netlink: handle errors from netlink_dump() ... netlink_dump() may failed, but nobody handle its error. It generates output data, when a previous portion has been returned to user space. This mechanism works when all data isn't go in skb. If we enter in netlink_recvmsg() and skb is absent in the recv queue, the netlink_dump() will not been executed. So if netlink_dump() is failed one time, the new data never appear and the reader will sleep forever. netlink_dump() is called from two places: 1. from netlink_sendmsg->...->netlink_dump_start(). In this place we can report error directly and it will be returned by sendmsg(). 2. from netlink_recvmsg There we can't report error directly, because we have a portion of valid output data and call netlink_dump() for prepare the next portion. If netlink_dump() is failed, the socket will be mark as error and the next recvmsg will be failed. Signed-off-by: Andrey Vagin <avagin@openvz.org> Signed-off-by: David S. Miller <davem@davemloft.net>		2011-02-28 12:18:12 -08:00
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af_netlink.c	netlink: handle errors from netlink_dump()	2011-02-28 12:18:12 -08:00
genetlink.c	Revert "netlink: test for all flags of the NLM_F_DUMP composite"	2011-01-19 13:34:20 -08:00
Makefile	netlink: Move netlink attribute parsing support to lib	2009-03-04 14:53:30 +08:00