David Howells c7e86acfce rxrpc: Fix lockup due to no error backoff after ack transmit error ... If the network becomes (partially) unavailable, say by disabling IPv6, the background ACK transmission routine can get itself into a tizzy by proposing immediate ACK retransmission. Since we're in the call event processor, that happens immediately without returning to the workqueue manager. The condition should clear after a while when either the network comes back or the call times out. Fix this by: (1) When re-proposing an ACK on failed Tx, don't schedule it immediately. This will allow a certain amount of time to elapse before we try again. (2) Enforce a return to the workqueue manager after a certain number of iterations of the call processing loop. (3) Add a backoff delay that increases the delay on deferred ACKs by a jiffy per failed transmission to a limit of HZ. The backoff delay is cleared on a successful return from kernel_sendmsg(). (4) Cancel calls immediately if the opening sendmsg fails. The layer above can arrange retransmission or rotate to another server. Fixes: 248f219cb8 ("rxrpc: Rewrite the data and ack handling code") Signed-off-by: David Howells <dhowells@redhat.com> Signed-off-by: David S. Miller <davem@davemloft.net>		2018-11-02 23:59:26 -07:00
..
af_rxrpc.c	Revert "net: simplify sock_poll_wait"	2018-10-23 10:57:06 -07:00
ar-internal.h	rxrpc: Fix lockup due to no error backoff after ack transmit error	2018-11-02 23:59:26 -07:00
call_accept.c	Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net	2018-10-19 11:03:06 -07:00
call_event.c	rxrpc: Fix lockup due to no error backoff after ack transmit error	2018-11-02 23:59:26 -07:00
call_object.c
conn_client.c
conn_event.c
conn_object.c
conn_service.c
input.c
insecure.c
Kconfig
key.c
local_event.c
local_object.c
Makefile
misc.c
net_ns.c
output.c	rxrpc: Fix lockup due to no error backoff after ack transmit error	2018-11-02 23:59:26 -07:00
peer_event.c	Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net	2018-10-19 11:03:06 -07:00
peer_object.c
proc.c
protocol.h
recvmsg.c
rxkad.c
security.c
sendmsg.c
skbuff.c
sysctl.c
utils.c