diff options
-rw-r--r-- | include/trace/events/rxrpc.h | 52 | ||||
-rw-r--r-- | net/rxrpc/ar-internal.h | 10 | ||||
-rw-r--r-- | net/rxrpc/call_event.c | 95 | ||||
-rw-r--r-- | net/rxrpc/call_object.c | 2 | ||||
-rw-r--r-- | net/rxrpc/input.c | 8 | ||||
-rw-r--r-- | net/rxrpc/misc.c | 18 | ||||
-rw-r--r-- | net/rxrpc/output.c | 7 | ||||
-rw-r--r-- | net/rxrpc/protocol.h | 7 | ||||
-rw-r--r-- | net/rxrpc/recvmsg.c | 14 | ||||
-rw-r--r-- | net/rxrpc/sendmsg.c | 2 | ||||
-rw-r--r-- | net/rxrpc/sysctl.c | 9 |
11 files changed, 86 insertions, 138 deletions
diff --git a/include/trace/events/rxrpc.h b/include/trace/events/rxrpc.h index 1597ff7ad97e..d32e9858c682 100644 --- a/include/trace/events/rxrpc.h +++ b/include/trace/events/rxrpc.h @@ -158,6 +158,7 @@ #define rxrpc_propose_ack_traces \ EM(rxrpc_propose_ack_client_tx_end, "ClTxEnd") \ EM(rxrpc_propose_ack_input_data, "DataIn ") \ + EM(rxrpc_propose_ack_input_data_hole, "DataInH") \ EM(rxrpc_propose_ack_ping_for_check_life, "ChkLife") \ EM(rxrpc_propose_ack_ping_for_keepalive, "KeepAlv") \ EM(rxrpc_propose_ack_ping_for_lost_ack, "LostAck") \ @@ -170,11 +171,6 @@ EM(rxrpc_propose_ack_rotate_rx, "RxAck ") \ E_(rxrpc_propose_ack_terminal_ack, "ClTerm ") -#define rxrpc_propose_ack_outcomes \ - EM(rxrpc_propose_ack_subsume, " Subsume") \ - EM(rxrpc_propose_ack_update, " Update") \ - E_(rxrpc_propose_ack_use, " New") - #define rxrpc_congest_modes \ EM(RXRPC_CALL_CONGEST_AVOIDANCE, "CongAvoid") \ EM(RXRPC_CALL_FAST_RETRANSMIT, "FastReTx ") \ @@ -313,7 +309,6 @@ rxrpc_congest_changes; rxrpc_congest_modes; rxrpc_conn_traces; rxrpc_local_traces; -rxrpc_propose_ack_outcomes; rxrpc_propose_ack_traces; rxrpc_receive_traces; rxrpc_recvmsg_traces; @@ -1012,7 +1007,7 @@ TRACE_EVENT(rxrpc_timer, __entry->call = call->debug_id; __entry->why = why; __entry->now = now; - __entry->ack_at = call->ack_at; + __entry->ack_at = call->delay_ack_at; __entry->ack_lost_at = call->ack_lost_at; __entry->resend_at = call->resend_at; __entry->expect_rx_by = call->expect_rx_by; @@ -1054,7 +1049,7 @@ TRACE_EVENT(rxrpc_timer_expired, TP_fast_assign( __entry->call = call->debug_id; __entry->now = now; - __entry->ack_at = call->ack_at; + __entry->ack_at = call->delay_ack_at; __entry->ack_lost_at = call->ack_lost_at; __entry->resend_at = call->resend_at; __entry->expect_rx_by = call->expect_rx_by; @@ -1098,17 +1093,15 @@ TRACE_EVENT(rxrpc_rx_lose, TRACE_EVENT(rxrpc_propose_ack, TP_PROTO(struct rxrpc_call *call, enum rxrpc_propose_ack_trace why, - u8 ack_reason, rxrpc_serial_t serial, - enum rxrpc_propose_ack_outcome outcome), + u8 ack_reason, rxrpc_serial_t serial), - TP_ARGS(call, why, ack_reason, serial, outcome), + TP_ARGS(call, why, ack_reason, serial), TP_STRUCT__entry( __field(unsigned int, call ) __field(enum rxrpc_propose_ack_trace, why ) __field(rxrpc_serial_t, serial ) __field(u8, ack_reason ) - __field(enum rxrpc_propose_ack_outcome, outcome ) ), TP_fast_assign( @@ -1116,15 +1109,13 @@ TRACE_EVENT(rxrpc_propose_ack, __entry->why = why; __entry->serial = serial; __entry->ack_reason = ack_reason; - __entry->outcome = outcome; ), - TP_printk("c=%08x %s %s r=%08x%s", + TP_printk("c=%08x %s %s r=%08x", __entry->call, __print_symbolic(__entry->why, rxrpc_propose_ack_traces), __print_symbolic(__entry->ack_reason, rxrpc_ack_names), - __entry->serial, - __print_symbolic(__entry->outcome, rxrpc_propose_ack_outcomes)) + __entry->serial) ); TRACE_EVENT(rxrpc_send_ack, @@ -1154,6 +1145,35 @@ TRACE_EVENT(rxrpc_send_ack, __entry->serial) ); +TRACE_EVENT(rxrpc_drop_ack, + TP_PROTO(struct rxrpc_call *call, enum rxrpc_propose_ack_trace why, + u8 ack_reason, rxrpc_serial_t serial, bool nobuf), + + TP_ARGS(call, why, ack_reason, serial, nobuf), + + TP_STRUCT__entry( + __field(unsigned int, call ) + __field(enum rxrpc_propose_ack_trace, why ) + __field(rxrpc_serial_t, serial ) + __field(u8, ack_reason ) + __field(bool, nobuf ) + ), + + TP_fast_assign( + __entry->call = call->debug_id; + __entry->why = why; + __entry->serial = serial; + __entry->ack_reason = ack_reason; + __entry->nobuf = nobuf; + ), + + TP_printk("c=%08x %s %s r=%08x nbf=%u", + __entry->call, + __print_symbolic(__entry->why, rxrpc_propose_ack_traces), + __print_symbolic(__entry->ack_reason, rxrpc_ack_names), + __entry->serial, __entry->nobuf) + ); + TRACE_EVENT(rxrpc_retransmit, TP_PROTO(struct rxrpc_call *call, rxrpc_seq_t seq, u8 annotation, s64 expiry), diff --git a/net/rxrpc/ar-internal.h b/net/rxrpc/ar-internal.h index 802a8f372af2..5a81545a58d5 100644 --- a/net/rxrpc/ar-internal.h +++ b/net/rxrpc/ar-internal.h @@ -516,6 +516,8 @@ enum rxrpc_call_flag { RXRPC_CALL_DISCONNECTED, /* The call has been disconnected */ RXRPC_CALL_KERNEL, /* The call was made by the kernel */ RXRPC_CALL_UPGRADE, /* Service upgrade was requested for the call */ + RXRPC_CALL_DELAY_ACK_PENDING, /* DELAY ACK generation is pending */ + RXRPC_CALL_IDLE_ACK_PENDING, /* IDLE ACK generation is pending */ }; /* @@ -582,7 +584,7 @@ struct rxrpc_call { struct rxrpc_net *rxnet; /* Network namespace to which call belongs */ const struct rxrpc_security *security; /* applied security module */ struct mutex user_mutex; /* User access mutex */ - unsigned long ack_at; /* When deferred ACK needs to happen */ + unsigned long delay_ack_at; /* When DELAY ACK needs to happen */ unsigned long ack_lost_at; /* When ACK is figured as lost */ unsigned long resend_at; /* When next resend needs to happen */ unsigned long ping_at; /* When next to send a ping */ @@ -834,7 +836,8 @@ int rxrpc_user_charge_accept(struct rxrpc_sock *, unsigned long); void rxrpc_propose_ping(struct rxrpc_call *call, u32 serial, enum rxrpc_propose_ack_trace why); void rxrpc_send_ACK(struct rxrpc_call *, u8, rxrpc_serial_t, enum rxrpc_propose_ack_trace); -void rxrpc_propose_ACK(struct rxrpc_call *, u8, u32, enum rxrpc_propose_ack_trace); +void rxrpc_propose_delay_ACK(struct rxrpc_call *, rxrpc_serial_t, + enum rxrpc_propose_ack_trace); void rxrpc_process_call(struct work_struct *); void rxrpc_reduce_call_timer(struct rxrpc_call *call, @@ -1016,15 +1019,12 @@ static inline bool __rxrpc_use_local(struct rxrpc_local *local) * misc.c */ extern unsigned int rxrpc_max_backlog __read_mostly; -extern unsigned long rxrpc_requested_ack_delay; extern unsigned long rxrpc_soft_ack_delay; extern unsigned long rxrpc_idle_ack_delay; extern unsigned int rxrpc_rx_window_size; extern unsigned int rxrpc_rx_mtu; extern unsigned int rxrpc_rx_jumbo_max; -extern const s8 rxrpc_ack_priority[]; - /* * net_ns.c */ diff --git a/net/rxrpc/call_event.c b/net/rxrpc/call_event.c index 67b54ad914a1..36f60ac1d95d 100644 --- a/net/rxrpc/call_event.c +++ b/net/rxrpc/call_event.c @@ -29,70 +29,29 @@ void rxrpc_propose_ping(struct rxrpc_call *call, u32 serial, spin_lock_bh(&call->lock); if (time_before(ping_at, call->ping_at)) { - rxrpc_inc_stat(call->rxnet, stat_tx_acks[RXRPC_ACK_PING]); WRITE_ONCE(call->ping_at, ping_at); rxrpc_reduce_call_timer(call, ping_at, now, rxrpc_timer_set_for_ping); - trace_rxrpc_propose_ack(call, why, RXRPC_ACK_PING, serial, - rxrpc_propose_ack_use); + trace_rxrpc_propose_ack(call, why, RXRPC_ACK_PING, serial); } spin_unlock_bh(&call->lock); } /* - * propose an ACK be sent + * Propose a DELAY ACK be sent in the future. */ -static void __rxrpc_propose_ACK(struct rxrpc_call *call, u8 ack_reason, - u32 serial, enum rxrpc_propose_ack_trace why) +static void __rxrpc_propose_delay_ACK(struct rxrpc_call *call, + rxrpc_serial_t serial, + enum rxrpc_propose_ack_trace why) { - enum rxrpc_propose_ack_outcome outcome = rxrpc_propose_ack_use; unsigned long expiry = rxrpc_soft_ack_delay; unsigned long now = jiffies, ack_at; - s8 prior = rxrpc_ack_priority[ack_reason]; - - rxrpc_inc_stat(call->rxnet, stat_tx_acks[ack_reason]); - - /* Update DELAY, IDLE, REQUESTED and PING_RESPONSE ACK serial - * numbers, but we don't alter the timeout. - */ - _debug("prior %u %u vs %u %u", - ack_reason, prior, - call->ackr_reason, rxrpc_ack_priority[call->ackr_reason]); - if (ack_reason == call->ackr_reason) { - if (RXRPC_ACK_UPDATEABLE & (1 << ack_reason)) { - outcome = rxrpc_propose_ack_update; - call->ackr_serial = serial; - } - } else if (prior > rxrpc_ack_priority[call->ackr_reason]) { - call->ackr_reason = ack_reason; - call->ackr_serial = serial; - } else { - outcome = rxrpc_propose_ack_subsume; - } - - switch (ack_reason) { - case RXRPC_ACK_REQUESTED: - if (rxrpc_requested_ack_delay < expiry) - expiry = rxrpc_requested_ack_delay; - break; - - case RXRPC_ACK_DELAY: - if (rxrpc_soft_ack_delay < expiry) - expiry = rxrpc_soft_ack_delay; - break; - - case RXRPC_ACK_IDLE: - if (rxrpc_idle_ack_delay < expiry) - expiry = rxrpc_idle_ack_delay; - break; - - default: - WARN_ON(1); - return; - } + call->ackr_serial = serial; + if (rxrpc_soft_ack_delay < expiry) + expiry = rxrpc_soft_ack_delay; if (call->peer->srtt_us != 0) ack_at = usecs_to_jiffies(call->peer->srtt_us >> 3); else @@ -100,23 +59,23 @@ static void __rxrpc_propose_ACK(struct rxrpc_call *call, u8 ack_reason, ack_at += READ_ONCE(call->tx_backoff); ack_at += now; - if (time_before(ack_at, call->ack_at)) { - WRITE_ONCE(call->ack_at, ack_at); + if (time_before(ack_at, call->delay_ack_at)) { + WRITE_ONCE(call->delay_ack_at, ack_at); rxrpc_reduce_call_timer(call, ack_at, now, rxrpc_timer_set_for_ack); } - trace_rxrpc_propose_ack(call, why, ack_reason, serial, outcome); + trace_rxrpc_propose_ack(call, why, RXRPC_ACK_DELAY, serial); } /* - * propose an ACK be sent, locking the call structure + * Propose a DELAY ACK be sent, locking the call structure */ -void rxrpc_propose_ACK(struct rxrpc_call *call, u8 ack_reason, u32 serial, - enum rxrpc_propose_ack_trace why) +void rxrpc_propose_delay_ACK(struct rxrpc_call *call, rxrpc_serial_t serial, + enum rxrpc_propose_ack_trace why) { spin_lock_bh(&call->lock); - __rxrpc_propose_ACK(call, ack_reason, serial, why); + __rxrpc_propose_delay_ACK(call, serial, why); spin_unlock_bh(&call->lock); } @@ -131,6 +90,11 @@ void rxrpc_send_ACK(struct rxrpc_call *call, u8 ack_reason, if (test_bit(RXRPC_CALL_DISCONNECTED, &call->flags)) return; + if (ack_reason == RXRPC_ACK_DELAY && + test_and_set_bit(RXRPC_CALL_DELAY_ACK_PENDING, &call->flags)) { + trace_rxrpc_drop_ack(call, why, ack_reason, serial, false); + return; + } rxrpc_inc_stat(call->rxnet, stat_tx_acks[ack_reason]); @@ -319,7 +283,6 @@ void rxrpc_process_call(struct work_struct *work) unsigned long now, next, t; unsigned int iterations = 0; rxrpc_serial_t ackr_serial; - u8 ackr_reason; rxrpc_see_call(call); @@ -364,19 +327,13 @@ recheck_state: set_bit(RXRPC_CALL_EV_EXPIRED, &call->events); } - t = READ_ONCE(call->ack_at); + t = READ_ONCE(call->delay_ack_at); if (time_after_eq(now, t)) { trace_rxrpc_timer(call, rxrpc_timer_exp_ack, now); - cmpxchg(&call->ack_at, t, now + MAX_JIFFY_OFFSET); - spin_lock_bh(&call->lock); - ackr_reason = call->ackr_reason; - ackr_serial = call->ackr_serial; - call->ackr_reason = 0; - call->ackr_serial = 0; - spin_unlock_bh(&call->lock); - if (ackr_reason) - rxrpc_send_ACK(call, ackr_reason, ackr_serial, - rxrpc_propose_ack_ping_for_lost_ack); + cmpxchg(&call->delay_ack_at, t, now + MAX_JIFFY_OFFSET); + ackr_serial = xchg(&call->ackr_serial, 0); + rxrpc_send_ACK(call, RXRPC_ACK_DELAY, ackr_serial, + rxrpc_propose_ack_ping_for_lost_ack); } t = READ_ONCE(call->ack_lost_at); @@ -441,7 +398,7 @@ recheck_state: set(call->expect_req_by); set(call->expect_term_by); - set(call->ack_at); + set(call->delay_ack_at); set(call->ack_lost_at); set(call->resend_at); set(call->keepalive_at); diff --git a/net/rxrpc/call_object.c b/net/rxrpc/call_object.c index 8290d94e9233..8f9e88897197 100644 --- a/net/rxrpc/call_object.c +++ b/net/rxrpc/call_object.c @@ -222,7 +222,7 @@ static void rxrpc_start_call_timer(struct rxrpc_call *call) unsigned long now = jiffies; unsigned long j = now + MAX_JIFFY_OFFSET; - call->ack_at = j; + call->delay_ack_at = j; call->ack_lost_at = j; call->resend_at = j; call->ping_at = j; diff --git a/net/rxrpc/input.c b/net/rxrpc/input.c index e23f66ef8c06..4df1bdc4de6c 100644 --- a/net/rxrpc/input.c +++ b/net/rxrpc/input.c @@ -299,7 +299,7 @@ static bool rxrpc_receiving_reply(struct rxrpc_call *call) now = jiffies; timo = now + MAX_JIFFY_OFFSET; WRITE_ONCE(call->resend_at, timo); - WRITE_ONCE(call->ack_at, timo); + WRITE_ONCE(call->delay_ack_at, timo); trace_rxrpc_timer(call, rxrpc_timer_init_for_reply, now); } @@ -542,7 +542,7 @@ static void rxrpc_input_data(struct rxrpc_call *call, struct sk_buff *skb) /* Send an immediate ACK if we fill in a hole */ if (!acked) { rxrpc_send_ACK(call, RXRPC_ACK_DELAY, serial, - rxrpc_propose_ack_input_data); + rxrpc_propose_ack_input_data_hole); acked = true; } } @@ -584,8 +584,8 @@ unlock: rxrpc_send_ACK(call, RXRPC_ACK_IDLE, ack_serial, rxrpc_propose_ack_input_data); else - rxrpc_propose_ACK(call, RXRPC_ACK_DELAY, ack_serial, - rxrpc_propose_ack_input_data); + rxrpc_propose_delay_ACK(call, ack_serial, + rxrpc_propose_ack_input_data); trace_rxrpc_notify_socket(call->debug_id, serial); rxrpc_notify_socket(call); diff --git a/net/rxrpc/misc.c b/net/rxrpc/misc.c index d4144fd86f84..f5f03f27bd6c 100644 --- a/net/rxrpc/misc.c +++ b/net/rxrpc/misc.c @@ -17,12 +17,6 @@ unsigned int rxrpc_max_backlog __read_mostly = 10; /* - * How long to wait before scheduling ACK generation after seeing a - * packet with RXRPC_REQUEST_ACK set (in jiffies). - */ -unsigned long rxrpc_requested_ack_delay = 1; - -/* * How long to wait before scheduling an ACK with subtype DELAY (in jiffies). * * We use this when we've received new data packets. If those packets aren't @@ -62,15 +56,3 @@ unsigned int rxrpc_rx_mtu = 5692; * sender that we're willing to handle. */ unsigned int rxrpc_rx_jumbo_max = 4; - -const s8 rxrpc_ack_priority[] = { - [0] = 0, - [RXRPC_ACK_DELAY] = 1, - [RXRPC_ACK_REQUESTED] = 2, - [RXRPC_ACK_IDLE] = 3, - [RXRPC_ACK_DUPLICATE] = 4, - [RXRPC_ACK_OUT_OF_SEQUENCE] = 5, - [RXRPC_ACK_EXCEEDS_WINDOW] = 6, - [RXRPC_ACK_NOSPACE] = 7, - [RXRPC_ACK_PING_RESPONSE] = 8, -}; diff --git a/net/rxrpc/output.c b/net/rxrpc/output.c index 1edbc678e8be..d35657b659ad 100644 --- a/net/rxrpc/output.c +++ b/net/rxrpc/output.c @@ -115,6 +115,8 @@ static size_t rxrpc_fill_out_ack(struct rxrpc_connection *conn, *ackp++ = RXRPC_ACK_TYPE_NACK; seq++; } while (before_eq(seq, top)); + } else if (txb->ack.reason == RXRPC_ACK_DELAY) { + txb->ack.reason = RXRPC_ACK_IDLE; } mtu = conn->params.peer->if_mtu; @@ -204,6 +206,11 @@ static int rxrpc_send_ack_packet(struct rxrpc_local *local, struct rxrpc_txbuf * if (txb->ack.reason == RXRPC_ACK_PING) txb->wire.flags |= RXRPC_REQUEST_ACK; + if (txb->ack.reason == RXRPC_ACK_DELAY) + clear_bit(RXRPC_CALL_DELAY_ACK_PENDING, &call->flags); + if (txb->ack.reason == RXRPC_ACK_IDLE) + clear_bit(RXRPC_CALL_IDLE_ACK_PENDING, &call->flags); + spin_lock_bh(&call->lock); n = rxrpc_fill_out_ack(conn, call, txb, &hard_ack, &top); spin_unlock_bh(&call->lock); diff --git a/net/rxrpc/protocol.h b/net/rxrpc/protocol.h index d2cf8e1d218f..f3d4e2700901 100644 --- a/net/rxrpc/protocol.h +++ b/net/rxrpc/protocol.h @@ -132,13 +132,6 @@ struct rxrpc_ackpacket { } __packed; -/* Some ACKs refer to specific packets and some are general and can be updated. */ -#define RXRPC_ACK_UPDATEABLE ((1 << RXRPC_ACK_REQUESTED) | \ - (1 << RXRPC_ACK_PING_RESPONSE) | \ - (1 << RXRPC_ACK_DELAY) | \ - (1 << RXRPC_ACK_IDLE)) - - /* * ACK packets can have a further piece of information tagged on the end */ diff --git a/net/rxrpc/recvmsg.c b/net/rxrpc/recvmsg.c index 104dd4a29f05..46e784edc0f4 100644 --- a/net/rxrpc/recvmsg.c +++ b/net/rxrpc/recvmsg.c @@ -188,11 +188,8 @@ static void rxrpc_end_rx_phase(struct rxrpc_call *call, rxrpc_serial_t serial) trace_rxrpc_receive(call, rxrpc_receive_end, 0, call->rx_top); ASSERTCMP(call->rx_hard_ack, ==, call->rx_top); - if (call->state == RXRPC_CALL_CLIENT_RECV_REPLY) { - rxrpc_propose_ACK(call, RXRPC_ACK_IDLE, serial, - rxrpc_propose_ack_terminal_ack); - //rxrpc_send_ack_packet(call, false, NULL); - } + if (call->state == RXRPC_CALL_CLIENT_RECV_REPLY) + rxrpc_propose_delay_ACK(call, serial, rxrpc_propose_ack_terminal_ack); write_lock_bh(&call->state_lock); @@ -206,8 +203,8 @@ static void rxrpc_end_rx_phase(struct rxrpc_call *call, rxrpc_serial_t serial) call->state = RXRPC_CALL_SERVER_ACK_REQUEST; call->expect_req_by = jiffies + MAX_JIFFY_OFFSET; write_unlock_bh(&call->state_lock); - rxrpc_propose_ACK(call, RXRPC_ACK_DELAY, serial, - rxrpc_propose_ack_processing_op); + rxrpc_propose_delay_ACK(call, serial, + rxrpc_propose_ack_processing_op); break; default: write_unlock_bh(&call->state_lock); @@ -259,7 +256,8 @@ static void rxrpc_rotate_rx_window(struct rxrpc_call *call) rxrpc_end_rx_phase(call, serial); } else { /* Check to see if there's an ACK that needs sending. */ - if (atomic_inc_return(&call->ackr_nr_consumed) > 2) { + if (atomic_inc_return(&call->ackr_nr_consumed) > 2 && + !test_and_set_bit(RXRPC_CALL_IDLE_ACK_PENDING, &call->flags)) { rxrpc_send_ACK(call, RXRPC_ACK_IDLE, serial, rxrpc_propose_ack_rotate_rx); rxrpc_transmit_ack_packets(call->peer->local); diff --git a/net/rxrpc/sendmsg.c b/net/rxrpc/sendmsg.c index ef4949259020..e32805a49324 100644 --- a/net/rxrpc/sendmsg.c +++ b/net/rxrpc/sendmsg.c @@ -234,7 +234,7 @@ static int rxrpc_queue_packet(struct rxrpc_sock *rx, struct rxrpc_call *call, case RXRPC_CALL_SERVER_ACK_REQUEST: call->state = RXRPC_CALL_SERVER_SEND_REPLY; now = jiffies; - WRITE_ONCE(call->ack_at, now + MAX_JIFFY_OFFSET); + WRITE_ONCE(call->delay_ack_at, now + MAX_JIFFY_OFFSET); if (call->ackr_reason == RXRPC_ACK_DELAY) call->ackr_reason = 0; trace_rxrpc_timer(call, rxrpc_timer_init_for_send_reply, now); diff --git a/net/rxrpc/sysctl.c b/net/rxrpc/sysctl.c index 555e0910786b..2bd987364e44 100644 --- a/net/rxrpc/sysctl.c +++ b/net/rxrpc/sysctl.c @@ -27,15 +27,6 @@ static const unsigned long max_jiffies = MAX_JIFFY_OFFSET; static struct ctl_table rxrpc_sysctl_table[] = { /* Values measured in milliseconds but used in jiffies */ { - .procname = "req_ack_delay", - .data = &rxrpc_requested_ack_delay, - .maxlen = sizeof(unsigned long), - .mode = 0644, - .proc_handler = proc_doulongvec_ms_jiffies_minmax, - .extra1 = (void *)&one_jiffy, - .extra2 = (void *)&max_jiffies, - }, - { .procname = "soft_ack_delay", .data = &rxrpc_soft_ack_delay, .maxlen = sizeof(unsigned long), |