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authorDavid Howells <dhowells@redhat.com>2017-11-24 10:18:41 +0000
committerDavid Howells <dhowells@redhat.com>2017-11-24 10:18:41 +0000
commita158bdd3247b9656df36ba133235fff702e9fdc3 (patch)
tree225fbe76860a798696021258c6620ae52faab75c /net/rxrpc/call_object.c
parent4812417894770f8c13e5dd8a66479ae44f4b01ff (diff)
downloadlinux-stericsson-a158bdd3247b9656df36ba133235fff702e9fdc3.tar.gz
rxrpc: Fix call timeouts
Fix the rxrpc call expiration timeouts and make them settable from userspace. By analogy with other rx implementations, there should be three timeouts: (1) "Normal timeout" This is set for all calls and is triggered if we haven't received any packets from the peer in a while. It is measured from the last time we received any packet on that call. This is not reset by any connection packets (such as CHALLENGE/RESPONSE packets). If a service operation takes a long time, the server should generate PING ACKs at a duration that's substantially less than the normal timeout so is to keep both sides alive. This is set at 1/6 of normal timeout. (2) "Idle timeout" This is set only for a service call and is triggered if we stop receiving the DATA packets that comprise the request data. It is measured from the last time we received a DATA packet. (3) "Hard timeout" This can be set for a call and specified the maximum lifetime of that call. It should not be specified by default. Some operations (such as volume transfer) take a long time. Allow userspace to set/change the timeouts on a call with sendmsg, using a control message: RXRPC_SET_CALL_TIMEOUTS The data to the message is a number of 32-bit words, not all of which need be given: u32 hard_timeout; /* sec from first packet */ u32 idle_timeout; /* msec from packet Rx */ u32 normal_timeout; /* msec from data Rx */ This can be set in combination with any other sendmsg() that affects a call. Signed-off-by: David Howells <dhowells@redhat.com>
Diffstat (limited to 'net/rxrpc/call_object.c')
-rw-r--r--net/rxrpc/call_object.c27
1 files changed, 16 insertions, 11 deletions
diff --git a/net/rxrpc/call_object.c b/net/rxrpc/call_object.c
index c3e1fa854471..b305970a9b63 100644
--- a/net/rxrpc/call_object.c
+++ b/net/rxrpc/call_object.c
@@ -51,8 +51,10 @@ static void rxrpc_call_timer_expired(unsigned long _call)
_enter("%d", call->debug_id);
- if (call->state < RXRPC_CALL_COMPLETE)
- rxrpc_set_timer(call, rxrpc_timer_expired, ktime_get_real());
+ if (call->state < RXRPC_CALL_COMPLETE) {
+ trace_rxrpc_timer(call, rxrpc_timer_expired, jiffies);
+ rxrpc_queue_call(call);
+ }
}
static struct lock_class_key rxrpc_call_user_mutex_lock_class_key;
@@ -139,6 +141,8 @@ struct rxrpc_call *rxrpc_alloc_call(struct rxrpc_sock *rx, gfp_t gfp)
atomic_set(&call->usage, 1);
call->debug_id = atomic_inc_return(&rxrpc_debug_id);
call->tx_total_len = -1;
+ call->next_rx_timo = 20 * HZ;
+ call->next_req_timo = 1 * HZ;
memset(&call->sock_node, 0xed, sizeof(call->sock_node));
@@ -189,15 +193,16 @@ static struct rxrpc_call *rxrpc_alloc_client_call(struct rxrpc_sock *rx,
*/
static void rxrpc_start_call_timer(struct rxrpc_call *call)
{
- ktime_t now = ktime_get_real(), expire_at;
-
- expire_at = ktime_add_ms(now, rxrpc_max_call_lifetime);
- call->expire_at = expire_at;
- call->ack_at = expire_at;
- call->ping_at = expire_at;
- call->resend_at = expire_at;
- call->timer.expires = jiffies + LONG_MAX / 2;
- rxrpc_set_timer(call, rxrpc_timer_begin, now);
+ unsigned long now = jiffies;
+ unsigned long j = now + MAX_JIFFY_OFFSET;
+
+ call->ack_at = j;
+ call->resend_at = j;
+ call->ping_at = j;
+ call->expect_rx_by = j;
+ call->expect_req_by = j;
+ call->expect_term_by = j;
+ call->timer.expires = now;
}
/*