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-rw-r--r--net/rxrpc/af_rxrpc.c24
-rw-r--r--net/rxrpc/ar-internal.h103
-rw-r--r--net/rxrpc/call_accept.c2
-rw-r--r--net/rxrpc/call_event.c229
-rw-r--r--net/rxrpc/call_object.c62
-rw-r--r--net/rxrpc/conn_client.c54
-rw-r--r--net/rxrpc/conn_event.c124
-rw-r--r--net/rxrpc/conn_object.c76
-rw-r--r--net/rxrpc/input.c76
-rw-r--r--net/rxrpc/misc.c19
-rw-r--r--net/rxrpc/net_ns.c33
-rw-r--r--net/rxrpc/output.c43
-rw-r--r--net/rxrpc/recvmsg.c12
-rw-r--r--net/rxrpc/sendmsg.c126
-rw-r--r--net/rxrpc/sysctl.c60
15 files changed, 719 insertions, 324 deletions
diff --git a/net/rxrpc/af_rxrpc.c b/net/rxrpc/af_rxrpc.c
index 9b5c46b052fd..dcd818fa837e 100644
--- a/net/rxrpc/af_rxrpc.c
+++ b/net/rxrpc/af_rxrpc.c
@@ -285,6 +285,7 @@ struct rxrpc_call *rxrpc_kernel_begin_call(struct socket *sock,
bool upgrade)
{
struct rxrpc_conn_parameters cp;
+ struct rxrpc_call_params p;
struct rxrpc_call *call;
struct rxrpc_sock *rx = rxrpc_sk(sock->sk);
int ret;
@@ -302,6 +303,10 @@ struct rxrpc_call *rxrpc_kernel_begin_call(struct socket *sock,
if (key && !key->payload.data[0])
key = NULL; /* a no-security key */
+ memset(&p, 0, sizeof(p));
+ p.user_call_ID = user_call_ID;
+ p.tx_total_len = tx_total_len;
+
memset(&cp, 0, sizeof(cp));
cp.local = rx->local;
cp.key = key;
@@ -309,8 +314,7 @@ struct rxrpc_call *rxrpc_kernel_begin_call(struct socket *sock,
cp.exclusive = false;
cp.upgrade = upgrade;
cp.service_id = srx->srx_service;
- call = rxrpc_new_client_call(rx, &cp, srx, user_call_ID, tx_total_len,
- gfp);
+ call = rxrpc_new_client_call(rx, &cp, srx, &p, gfp);
/* The socket has been unlocked. */
if (!IS_ERR(call)) {
call->notify_rx = notify_rx;
@@ -856,6 +860,7 @@ static void rxrpc_sock_destructor(struct sock *sk)
static int rxrpc_release_sock(struct sock *sk)
{
struct rxrpc_sock *rx = rxrpc_sk(sk);
+ struct rxrpc_net *rxnet = rxrpc_net(sock_net(&rx->sk));
_enter("%p{%d,%d}", sk, sk->sk_state, refcount_read(&sk->sk_refcnt));
@@ -863,6 +868,19 @@ static int rxrpc_release_sock(struct sock *sk)
sock_orphan(sk);
sk->sk_shutdown = SHUTDOWN_MASK;
+ /* We want to kill off all connections from a service socket
+ * as fast as possible because we can't share these; client
+ * sockets, on the other hand, can share an endpoint.
+ */
+ switch (sk->sk_state) {
+ case RXRPC_SERVER_BOUND:
+ case RXRPC_SERVER_BOUND2:
+ case RXRPC_SERVER_LISTENING:
+ case RXRPC_SERVER_LISTEN_DISABLED:
+ rx->local->service_closed = true;
+ break;
+ }
+
spin_lock_bh(&sk->sk_receive_queue.lock);
sk->sk_state = RXRPC_CLOSE;
spin_unlock_bh(&sk->sk_receive_queue.lock);
@@ -878,6 +896,8 @@ static int rxrpc_release_sock(struct sock *sk)
rxrpc_release_calls_on_socket(rx);
flush_workqueue(rxrpc_workqueue);
rxrpc_purge_queue(&sk->sk_receive_queue);
+ rxrpc_queue_work(&rxnet->service_conn_reaper);
+ rxrpc_queue_work(&rxnet->client_conn_reaper);
rxrpc_put_local(rx->local);
rx->local = NULL;
diff --git a/net/rxrpc/ar-internal.h b/net/rxrpc/ar-internal.h
index b2151993d384..416688381eb7 100644
--- a/net/rxrpc/ar-internal.h
+++ b/net/rxrpc/ar-internal.h
@@ -79,17 +79,20 @@ struct rxrpc_net {
struct list_head conn_proc_list; /* List of conns in this namespace for proc */
struct list_head service_conns; /* Service conns in this namespace */
rwlock_t conn_lock; /* Lock for ->conn_proc_list, ->service_conns */
- struct delayed_work service_conn_reaper;
+ struct work_struct service_conn_reaper;
+ struct timer_list service_conn_reap_timer;
unsigned int nr_client_conns;
unsigned int nr_active_client_conns;
bool kill_all_client_conns;
+ bool live;
spinlock_t client_conn_cache_lock; /* Lock for ->*_client_conns */
spinlock_t client_conn_discard_lock; /* Prevent multiple discarders */
struct list_head waiting_client_conns;
struct list_head active_client_conns;
struct list_head idle_client_conns;
- struct delayed_work client_conn_reaper;
+ struct work_struct client_conn_reaper;
+ struct timer_list client_conn_reap_timer;
struct list_head local_endpoints;
struct mutex local_mutex; /* Lock for ->local_endpoints */
@@ -265,6 +268,7 @@ struct rxrpc_local {
rwlock_t services_lock; /* lock for services list */
int debug_id; /* debug ID for printks */
bool dead;
+ bool service_closed; /* Service socket closed */
struct sockaddr_rxrpc srx; /* local address */
};
@@ -338,8 +342,17 @@ enum rxrpc_conn_flag {
RXRPC_CONN_DONT_REUSE, /* Don't reuse this connection */
RXRPC_CONN_COUNTED, /* Counted by rxrpc_nr_client_conns */
RXRPC_CONN_PROBING_FOR_UPGRADE, /* Probing for service upgrade */
+ RXRPC_CONN_FINAL_ACK_0, /* Need final ACK for channel 0 */
+ RXRPC_CONN_FINAL_ACK_1, /* Need final ACK for channel 1 */
+ RXRPC_CONN_FINAL_ACK_2, /* Need final ACK for channel 2 */
+ RXRPC_CONN_FINAL_ACK_3, /* Need final ACK for channel 3 */
};
+#define RXRPC_CONN_FINAL_ACK_MASK ((1UL << RXRPC_CONN_FINAL_ACK_0) | \
+ (1UL << RXRPC_CONN_FINAL_ACK_1) | \
+ (1UL << RXRPC_CONN_FINAL_ACK_2) | \
+ (1UL << RXRPC_CONN_FINAL_ACK_3))
+
/*
* Events that can be raised upon a connection.
*/
@@ -393,6 +406,7 @@ struct rxrpc_connection {
#define RXRPC_ACTIVE_CHANS_MASK ((1 << RXRPC_MAXCALLS) - 1)
struct list_head waiting_calls; /* Calls waiting for channels */
struct rxrpc_channel {
+ unsigned long final_ack_at; /* Time at which to issue final ACK */
struct rxrpc_call __rcu *call; /* Active call */
u32 call_id; /* ID of current call */
u32 call_counter; /* Call ID counter */
@@ -404,6 +418,7 @@ struct rxrpc_connection {
};
} channels[RXRPC_MAXCALLS];
+ struct timer_list timer; /* Conn event timer */
struct work_struct processor; /* connection event processor */
union {
struct rb_node client_node; /* Node in local->client_conns */
@@ -457,9 +472,10 @@ enum rxrpc_call_flag {
enum rxrpc_call_event {
RXRPC_CALL_EV_ACK, /* need to generate ACK */
RXRPC_CALL_EV_ABORT, /* need to generate abort */
- RXRPC_CALL_EV_TIMER, /* Timer expired */
RXRPC_CALL_EV_RESEND, /* Tx resend required */
RXRPC_CALL_EV_PING, /* Ping send required */
+ RXRPC_CALL_EV_EXPIRED, /* Expiry occurred */
+ RXRPC_CALL_EV_ACK_LOST, /* ACK may be lost, send ping */
};
/*
@@ -503,10 +519,16 @@ struct rxrpc_call {
struct rxrpc_peer *peer; /* Peer record for remote address */
struct rxrpc_sock __rcu *socket; /* socket responsible */
struct mutex user_mutex; /* User access mutex */
- ktime_t ack_at; /* When deferred ACK needs to happen */
- ktime_t resend_at; /* When next resend needs to happen */
- ktime_t ping_at; /* When next to send a ping */
- ktime_t expire_at; /* When the call times out */
+ unsigned long ack_at; /* When deferred 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 */
+ unsigned long keepalive_at; /* When next to send a keepalive ping */
+ unsigned long expect_rx_by; /* When we expect to get a packet by */
+ unsigned long expect_req_by; /* When we expect to get a request DATA packet by */
+ unsigned long expect_term_by; /* When we expect call termination by */
+ u32 next_rx_timo; /* Timeout for next Rx packet (jif) */
+ u32 next_req_timo; /* Timeout for next Rx request packet (jif) */
struct timer_list timer; /* Combined event timer */
struct work_struct processor; /* Event processor */
rxrpc_notify_rx_t notify_rx; /* kernel service Rx notification function */
@@ -609,6 +631,8 @@ struct rxrpc_call {
ktime_t acks_latest_ts; /* Timestamp of latest ACK received */
rxrpc_serial_t acks_latest; /* serial number of latest ACK received */
rxrpc_seq_t acks_lowest_nak; /* Lowest NACK in the buffer (or ==tx_hard_ack) */
+ rxrpc_seq_t acks_lost_top; /* tx_top at the time lost-ack ping sent */
+ rxrpc_serial_t acks_lost_ping; /* Serial number of probe ACK */
};
/*
@@ -632,6 +656,35 @@ struct rxrpc_ack_summary {
u8 cumulative_acks;
};
+/*
+ * sendmsg() cmsg-specified parameters.
+ */
+enum rxrpc_command {
+ RXRPC_CMD_SEND_DATA, /* send data message */
+ RXRPC_CMD_SEND_ABORT, /* request abort generation */
+ RXRPC_CMD_ACCEPT, /* [server] accept incoming call */
+ RXRPC_CMD_REJECT_BUSY, /* [server] reject a call as busy */
+};
+
+struct rxrpc_call_params {
+ s64 tx_total_len; /* Total Tx data length (if send data) */
+ unsigned long user_call_ID; /* User's call ID */
+ struct {
+ u32 hard; /* Maximum lifetime (sec) */
+ u32 idle; /* Max time since last data packet (msec) */
+ u32 normal; /* Max time since last call packet (msec) */
+ } timeouts;
+ u8 nr_timeouts; /* Number of timeouts specified */
+};
+
+struct rxrpc_send_params {
+ struct rxrpc_call_params call;
+ u32 abort_code; /* Abort code to Tx (if abort) */
+ enum rxrpc_command command : 8; /* The command to implement */
+ bool exclusive; /* Shared or exclusive call */
+ bool upgrade; /* If the connection is upgradeable */
+};
+
#include <trace/events/rxrpc.h>
/*
@@ -657,12 +710,19 @@ int rxrpc_reject_call(struct rxrpc_sock *);
/*
* call_event.c
*/
-void __rxrpc_set_timer(struct rxrpc_call *, enum rxrpc_timer_trace, ktime_t);
-void rxrpc_set_timer(struct rxrpc_call *, enum rxrpc_timer_trace, ktime_t);
void rxrpc_propose_ACK(struct rxrpc_call *, u8, u16, u32, bool, bool,
enum rxrpc_propose_ack_trace);
void rxrpc_process_call(struct work_struct *);
+static inline void rxrpc_reduce_call_timer(struct rxrpc_call *call,
+ unsigned long expire_at,
+ unsigned long now,
+ enum rxrpc_timer_trace why)
+{
+ trace_rxrpc_timer(call, why, now);
+ timer_reduce(&call->timer, expire_at);
+}
+
/*
* call_object.c
*/
@@ -672,11 +732,11 @@ extern unsigned int rxrpc_max_call_lifetime;
extern struct kmem_cache *rxrpc_call_jar;
struct rxrpc_call *rxrpc_find_call_by_user_ID(struct rxrpc_sock *, unsigned long);
-struct rxrpc_call *rxrpc_alloc_call(gfp_t);
+struct rxrpc_call *rxrpc_alloc_call(struct rxrpc_sock *, gfp_t);
struct rxrpc_call *rxrpc_new_client_call(struct rxrpc_sock *,
struct rxrpc_conn_parameters *,
struct sockaddr_rxrpc *,
- unsigned long, s64, gfp_t);
+ struct rxrpc_call_params *, gfp_t);
int rxrpc_retry_client_call(struct rxrpc_sock *,
struct rxrpc_call *,
struct rxrpc_conn_parameters *,
@@ -803,8 +863,8 @@ static inline bool __rxrpc_abort_eproto(struct rxrpc_call *call,
*/
extern unsigned int rxrpc_max_client_connections;
extern unsigned int rxrpc_reap_client_connections;
-extern unsigned int rxrpc_conn_idle_client_expiry;
-extern unsigned int rxrpc_conn_idle_client_fast_expiry;
+extern unsigned long rxrpc_conn_idle_client_expiry;
+extern unsigned long rxrpc_conn_idle_client_fast_expiry;
extern struct idr rxrpc_client_conn_ids;
void rxrpc_destroy_client_conn_ids(void);
@@ -825,6 +885,7 @@ void rxrpc_process_connection(struct work_struct *);
* conn_object.c
*/
extern unsigned int rxrpc_connection_expiry;
+extern unsigned int rxrpc_closed_conn_expiry;
struct rxrpc_connection *rxrpc_alloc_connection(gfp_t);
struct rxrpc_connection *rxrpc_find_connection_rcu(struct rxrpc_local *,
@@ -861,6 +922,12 @@ static inline void rxrpc_put_connection(struct rxrpc_connection *conn)
rxrpc_put_service_conn(conn);
}
+static inline void rxrpc_reduce_conn_timer(struct rxrpc_connection *conn,
+ unsigned long expire_at)
+{
+ timer_reduce(&conn->timer, expire_at);
+}
+
/*
* conn_service.c
*/
@@ -930,13 +997,13 @@ static inline void rxrpc_queue_local(struct rxrpc_local *local)
* misc.c
*/
extern unsigned int rxrpc_max_backlog __read_mostly;
-extern unsigned int rxrpc_requested_ack_delay;
-extern unsigned int rxrpc_soft_ack_delay;
-extern unsigned int rxrpc_idle_ack_delay;
+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 unsigned int rxrpc_resend_timeout;
+extern unsigned long rxrpc_resend_timeout;
extern const s8 rxrpc_ack_priority[];
@@ -954,7 +1021,7 @@ static inline struct rxrpc_net *rxrpc_net(struct net *net)
/*
* output.c
*/
-int rxrpc_send_ack_packet(struct rxrpc_call *, bool);
+int rxrpc_send_ack_packet(struct rxrpc_call *, bool, rxrpc_serial_t *);
int rxrpc_send_abort_packet(struct rxrpc_call *);
int rxrpc_send_data_packet(struct rxrpc_call *, struct sk_buff *, bool);
void rxrpc_reject_packets(struct rxrpc_local *);
diff --git a/net/rxrpc/call_accept.c b/net/rxrpc/call_accept.c
index cbd1701e813a..3028298ca561 100644
--- a/net/rxrpc/call_accept.c
+++ b/net/rxrpc/call_accept.c
@@ -94,7 +94,7 @@ static int rxrpc_service_prealloc_one(struct rxrpc_sock *rx,
/* Now it gets complicated, because calls get registered with the
* socket here, particularly if a user ID is preassigned by the user.
*/
- call = rxrpc_alloc_call(gfp);
+ call = rxrpc_alloc_call(rx, gfp);
if (!call)
return -ENOMEM;
call->flags |= (1 << RXRPC_CALL_IS_SERVICE);
diff --git a/net/rxrpc/call_event.c b/net/rxrpc/call_event.c
index 3574508baf9a..ad2ab1103189 100644
--- a/net/rxrpc/call_event.c
+++ b/net/rxrpc/call_event.c
@@ -22,80 +22,6 @@
#include "ar-internal.h"
/*
- * Set the timer
- */
-void __rxrpc_set_timer(struct rxrpc_call *call, enum rxrpc_timer_trace why,
- ktime_t now)
-{
- unsigned long t_j, now_j = jiffies;
- ktime_t t;
- bool queue = false;
-
- if (call->state < RXRPC_CALL_COMPLETE) {
- t = call->expire_at;
- if (!ktime_after(t, now)) {
- trace_rxrpc_timer(call, why, now, now_j);
- queue = true;
- goto out;
- }
-
- if (!ktime_after(call->resend_at, now)) {
- call->resend_at = call->expire_at;
- if (!test_and_set_bit(RXRPC_CALL_EV_RESEND, &call->events))
- queue = true;
- } else if (ktime_before(call->resend_at, t)) {
- t = call->resend_at;
- }
-
- if (!ktime_after(call->ack_at, now)) {
- call->ack_at = call->expire_at;
- if (!test_and_set_bit(RXRPC_CALL_EV_ACK, &call->events))
- queue = true;
- } else if (ktime_before(call->ack_at, t)) {
- t = call->ack_at;
- }
-
- if (!ktime_after(call->ping_at, now)) {
- call->ping_at = call->expire_at;
- if (!test_and_set_bit(RXRPC_CALL_EV_PING, &call->events))
- queue = true;
- } else if (ktime_before(call->ping_at, t)) {
- t = call->ping_at;
- }
-
- t_j = nsecs_to_jiffies(ktime_to_ns(ktime_sub(t, now)));
- t_j += jiffies;
-
- /* We have to make sure that the calculated jiffies value falls
- * at or after the nsec value, or we may loop ceaselessly
- * because the timer times out, but we haven't reached the nsec
- * timeout yet.
- */
- t_j++;
-
- if (call->timer.expires != t_j || !timer_pending(&call->timer)) {
- mod_timer(&call->timer, t_j);
- trace_rxrpc_timer(call, why, now, now_j);
- }
- }
-
-out:
- if (queue)
- rxrpc_queue_call(call);
-}
-
-/*
- * Set the timer
- */
-void rxrpc_set_timer(struct rxrpc_call *call, enum rxrpc_timer_trace why,
- ktime_t now)
-{
- read_lock_bh(&call->state_lock);
- __rxrpc_set_timer(call, why, now);
- read_unlock_bh(&call->state_lock);
-}
-
-/*
* Propose a PING ACK be sent.
*/
static void rxrpc_propose_ping(struct rxrpc_call *call,
@@ -106,12 +32,13 @@ static void rxrpc_propose_ping(struct rxrpc_call *call,
!test_and_set_bit(RXRPC_CALL_EV_PING, &call->events))
rxrpc_queue_call(call);
} else {
- ktime_t now = ktime_get_real();
- ktime_t ping_at = ktime_add_ms(now, rxrpc_idle_ack_delay);
+ unsigned long now = jiffies;
+ unsigned long ping_at = now + rxrpc_idle_ack_delay;
- if (ktime_before(ping_at, call->ping_at)) {
- call->ping_at = ping_at;
- rxrpc_set_timer(call, rxrpc_timer_set_for_ping, now);
+ if (time_before(ping_at, call->ping_at)) {
+ WRITE_ONCE(call->ping_at, ping_at);
+ rxrpc_reduce_call_timer(call, ping_at, now,
+ rxrpc_timer_set_for_ping);
}
}
}
@@ -125,8 +52,7 @@ static void __rxrpc_propose_ACK(struct rxrpc_call *call, u8 ack_reason,
enum rxrpc_propose_ack_trace why)
{
enum rxrpc_propose_ack_outcome outcome = rxrpc_propose_ack_use;
- unsigned int expiry = rxrpc_soft_ack_delay;
- ktime_t now, ack_at;
+ unsigned long expiry = rxrpc_soft_ack_delay;
s8 prior = rxrpc_ack_priority[ack_reason];
/* Pings are handled specially because we don't want to accidentally
@@ -190,11 +116,18 @@ static void __rxrpc_propose_ACK(struct rxrpc_call *call, u8 ack_reason,
background)
rxrpc_queue_call(call);
} else {
- now = ktime_get_real();
- ack_at = ktime_add_ms(now, expiry);
- if (ktime_before(ack_at, call->ack_at)) {
- call->ack_at = ack_at;
- rxrpc_set_timer(call, rxrpc_timer_set_for_ack, now);
+ unsigned long now = jiffies, ack_at;
+
+ if (call->peer->rtt_usage > 0)
+ ack_at = nsecs_to_jiffies(call->peer->rtt);
+ else
+ ack_at = expiry;
+
+ ack_at += now;
+ if (time_before(ack_at, call->ack_at)) {
+ WRITE_ONCE(call->ack_at, ack_at);
+ rxrpc_reduce_call_timer(call, ack_at, now,
+ rxrpc_timer_set_for_ack);
}
}
@@ -227,18 +160,28 @@ static void rxrpc_congestion_timeout(struct rxrpc_call *call)
/*
* Perform retransmission of NAK'd and unack'd packets.
*/
-static void rxrpc_resend(struct rxrpc_call *call, ktime_t now)
+static void rxrpc_resend(struct rxrpc_call *call, unsigned long now_j)
{
struct rxrpc_skb_priv *sp;
struct sk_buff *skb;
+ unsigned long resend_at;
rxrpc_seq_t cursor, seq, top;
- ktime_t max_age, oldest, ack_ts;
+ ktime_t now, max_age, oldest, ack_ts, timeout, min_timeo;
int ix;
u8 annotation, anno_type, retrans = 0, unacked = 0;
_enter("{%d,%d}", call->tx_hard_ack, call->tx_top);
- max_age = ktime_sub_ms(now, rxrpc_resend_timeout);
+ if (call->peer->rtt_usage > 1)
+ timeout = ns_to_ktime(call->peer->rtt * 3 / 2);
+ else
+ timeout = ms_to_ktime(rxrpc_resend_timeout);
+ min_timeo = ns_to_ktime((1000000000 / HZ) * 4);
+ if (ktime_before(timeout, min_timeo))
+ timeout = min_timeo;
+
+ now = ktime_get_real();
+ max_age = ktime_sub(now, timeout);
spin_lock_bh(&call->lock);
@@ -282,7 +225,9 @@ static void rxrpc_resend(struct rxrpc_call *call, ktime_t now)
ktime_to_ns(ktime_sub(skb->tstamp, max_age)));
}
- call->resend_at = ktime_add_ms(oldest, rxrpc_resend_timeout);
+ resend_at = nsecs_to_jiffies(ktime_to_ns(ktime_sub(oldest, now)));
+ resend_at += jiffies + rxrpc_resend_timeout;
+ WRITE_ONCE(call->resend_at, resend_at);
if (unacked)
rxrpc_congestion_timeout(call);
@@ -292,14 +237,15 @@ static void rxrpc_resend(struct rxrpc_call *call, ktime_t now)
* retransmitting data.
*/
if (!retrans) {
- rxrpc_set_timer(call, rxrpc_timer_set_for_resend, now);
+ rxrpc_reduce_call_timer(call, resend_at, now,
+ rxrpc_timer_set_for_resend);
spin_unlock_bh(&call->lock);
ack_ts = ktime_sub(now, call->acks_latest_ts);
if (ktime_to_ns(ack_ts) < call->peer->rtt)
goto out;
rxrpc_propose_ACK(call, RXRPC_ACK_PING, 0, 0, true, false,
rxrpc_propose_ack_ping_for_lost_ack);
- rxrpc_send_ack_packet(call, true);
+ rxrpc_send_ack_packet(call, true, NULL);
goto out;
}
@@ -364,7 +310,8 @@ void rxrpc_process_call(struct work_struct *work)
{
struct rxrpc_call *call =
container_of(work, struct rxrpc_call, processor);
- ktime_t now;
+ rxrpc_serial_t *send_ack;
+ unsigned long now, next, t;
rxrpc_see_call(call);
@@ -384,22 +331,89 @@ recheck_state:
goto out_put;
}
- now = ktime_get_real();
- if (ktime_before(call->expire_at, now)) {
+ /* Work out if any timeouts tripped */
+ now = jiffies;
+ t = READ_ONCE(call->expect_rx_by);
+ if (time_after_eq(now, t)) {
+ trace_rxrpc_timer(call, rxrpc_timer_exp_normal, now);
+ set_bit(RXRPC_CALL_EV_EXPIRED, &call->events);
+ }
+
+ t = READ_ONCE(call->expect_req_by);
+ if (call->state == RXRPC_CALL_SERVER_RECV_REQUEST &&
+ time_after_eq(now, t)) {
+ trace_rxrpc_timer(call, rxrpc_timer_exp_idle, now);
+ set_bit(RXRPC_CALL_EV_EXPIRED, &call->events);
+ }
+
+ t = READ_ONCE(call->expect_term_by);
+ if (time_after_eq(now, t)) {
+ trace_rxrpc_timer(call, rxrpc_timer_exp_hard, now);
+ set_bit(RXRPC_CALL_EV_EXPIRED, &call->events);
+ }
+
+ t = READ_ONCE(call->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);
+ set_bit(RXRPC_CALL_EV_ACK, &call->events);
+ }
+
+ t = READ_ONCE(call->ack_lost_at);
+ if (time_after_eq(now, t)) {
+ trace_rxrpc_timer(call, rxrpc_timer_exp_lost_ack, now);
+ cmpxchg(&call->ack_lost_at, t, now + MAX_JIFFY_OFFSET);
+ set_bit(RXRPC_CALL_EV_ACK_LOST, &call->events);
+ }
+
+ t = READ_ONCE(call->keepalive_at);
+ if (time_after_eq(now, t)) {
+ trace_rxrpc_timer(call, rxrpc_timer_exp_keepalive, now);
+ cmpxchg(&call->keepalive_at, t, now + MAX_JIFFY_OFFSET);
+ rxrpc_propose_ACK(call, RXRPC_ACK_PING, 0, 0, true, true,
+ rxrpc_propose_ack_ping_for_keepalive);
+ set_bit(RXRPC_CALL_EV_PING, &call->events);
+ }
+
+ t = READ_ONCE(call->ping_at);
+ if (time_after_eq(now, t)) {
+ trace_rxrpc_timer(call, rxrpc_timer_exp_ping, now);
+ cmpxchg(&call->ping_at, t, now + MAX_JIFFY_OFFSET);
+ set_bit(RXRPC_CALL_EV_PING, &call->events);
+ }
+
+ t = READ_ONCE(call->resend_at);
+ if (time_after_eq(now, t)) {
+ trace_rxrpc_timer(call, rxrpc_timer_exp_resend, now);
+ cmpxchg(&call->resend_at, t, now + MAX_JIFFY_OFFSET);
+ set_bit(RXRPC_CALL_EV_RESEND, &call->events);
+ }
+
+ /* Process events */
+ if (test_and_clear_bit(RXRPC_CALL_EV_EXPIRED, &call->events)) {
rxrpc_abort_call("EXP", call, 0, RX_USER_ABORT, -ETIME);
set_bit(RXRPC_CALL_EV_ABORT, &call->events);
goto recheck_state;
}
- if (test_and_clear_bit(RXRPC_CALL_EV_ACK, &call->events)) {
+ send_ack = NULL;
+ if (test_and_clear_bit(RXRPC_CALL_EV_ACK_LOST, &call->events)) {
+ call->acks_lost_top = call->tx_top;
+ rxrpc_propose_ACK(call, RXRPC_ACK_PING, 0, 0, true, false,
+ rxrpc_propose_ack_ping_for_lost_ack);
+ send_ack = &call->acks_lost_ping;
+ }
+
+ if (test_and_clear_bit(RXRPC_CALL_EV_ACK, &call->events) ||
+ send_ack) {
if (call->ackr_reason) {
- rxrpc_send_ack_packet(call, false);
+ rxrpc_send_ack_packet(call, false, send_ack);
goto recheck_state;
}
}
if (test_and_clear_bit(RXRPC_CALL_EV_PING, &call->events)) {
- rxrpc_send_ack_packet(call, true);
+ rxrpc_send_ack_packet(call, true, NULL);
goto recheck_state;
}
@@ -408,7 +422,24 @@ recheck_state:
goto recheck_state;
}
- rxrpc_set_timer(call, rxrpc_timer_set_for_resend, now);
+ /* Make sure the timer is restarted */
+ next = call->expect_rx_by;
+
+#define set(T) { t = READ_ONCE(T); if (time_before(t, next)) next = t; }
+
+ set(call->expect_req_by);
+ set(call->expect_term_by);
+ set(call->ack_at);
+ set(call->ack_lost_at);
+ set(call->resend_at);
+ set(call->keepalive_at);
+ set(call->ping_at);
+
+ now = jiffies;
+ if (time_after_eq(now, next))
+ goto recheck_state;
+
+ rxrpc_reduce_call_timer(call, next, now, rxrpc_timer_restart);
/* other events may have been raised since we started checking */
if (call->events && call->state < RXRPC_CALL_COMPLETE) {
diff --git a/net/rxrpc/call_object.c b/net/rxrpc/call_object.c
index 994dc2df57e4..0b2db38dd32d 100644
--- a/net/rxrpc/call_object.c
+++ b/net/rxrpc/call_object.c
@@ -51,10 +51,14 @@ static void rxrpc_call_timer_expired(struct timer_list *t)
_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;
+
/*
* find an extant server call
* - called in process context with IRQs enabled
@@ -95,7 +99,7 @@ found_extant_call:
/*
* allocate a new call
*/
-struct rxrpc_call *rxrpc_alloc_call(gfp_t gfp)
+struct rxrpc_call *rxrpc_alloc_call(struct rxrpc_sock *rx, gfp_t gfp)
{
struct rxrpc_call *call;
@@ -114,6 +118,14 @@ struct rxrpc_call *rxrpc_alloc_call(gfp_t gfp)
goto nomem_2;
mutex_init(&call->user_mutex);
+
+ /* Prevent lockdep reporting a deadlock false positive between the afs
+ * filesystem and sys_sendmsg() via the mmap sem.
+ */
+ if (rx->sk.sk_kern_sock)
+ lockdep_set_class(&call->user_mutex,
+ &rxrpc_call_user_mutex_lock_class_key);
+
timer_setup(&call->timer, rxrpc_call_timer_expired, 0);
INIT_WORK(&call->processor, &rxrpc_process_call);
INIT_LIST_HEAD(&call->link);
@@ -128,6 +140,8 @@ struct rxrpc_call *rxrpc_alloc_call(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));
@@ -150,7 +164,8 @@ nomem:
/*
* Allocate a new client call.
*/
-static struct rxrpc_call *rxrpc_alloc_client_call(struct sockaddr_rxrpc *srx,
+static struct rxrpc_call *rxrpc_alloc_client_call(struct rxrpc_sock *rx,
+ struct sockaddr_rxrpc *srx,
gfp_t gfp)
{
struct rxrpc_call *call;
@@ -158,7 +173,7 @@ static struct rxrpc_call *rxrpc_alloc_client_call(struct sockaddr_rxrpc *srx,
_enter("");
- call = rxrpc_alloc_call(gfp);
+ call = rxrpc_alloc_call(rx, gfp);
if (!call)
return ERR_PTR(-ENOMEM);
call->state = RXRPC_CALL_CLIENT_AWAIT_CONN;
@@ -177,15 +192,17 @@ static struct rxrpc_call *rxrpc_alloc_client_call(struct sockaddr_rxrpc *srx,
*/
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->ack_lost_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;
}
/*
@@ -196,8 +213,7 @@ static void rxrpc_start_call_timer(struct rxrpc_call *call)
struct rxrpc_call *rxrpc_new_client_call(struct rxrpc_sock *rx,
struct rxrpc_conn_parameters *cp,
struct sockaddr_rxrpc *srx,
- unsigned long user_call_ID,
- s64 tx_total_len,
+ struct rxrpc_call_params *p,
gfp_t gfp)
__releases(&rx->sk.sk_lock.slock)
{
@@ -207,18 +223,18 @@ struct rxrpc_call *rxrpc_new_client_call(struct rxrpc_sock *rx,
const void *here = __builtin_return_address(0);
int ret;
- _enter("%p,%lx", rx, user_call_ID);
+ _enter("%p,%lx", rx, p->user_call_ID);
- call = rxrpc_alloc_client_call(srx, gfp);
+ call = rxrpc_alloc_client_call(rx, srx, gfp);
if (IS_ERR(call)) {
release_sock(&rx->sk);
_leave(" = %ld", PTR_ERR(call));
return call;
}
- call->tx_total_len = tx_total_len;
+ call->tx_total_len = p->tx_total_len;
trace_rxrpc_call(call, rxrpc_call_new_client, atomic_read(&call->usage),
- here, (const void *)user_call_ID);
+ here, (const void *)p->user_call_ID);
/* We need to protect a partially set up call against the user as we
* will be acting outside the socket lock.
@@ -234,16 +250,16 @@ struct rxrpc_call *rxrpc_new_client_call(struct rxrpc_sock *rx,
parent = *pp;
xcall = rb_entry(parent, struct rxrpc_call, sock_node);
- if (user_call_ID < xcall->user_call_ID)
+ if (p->user_call_ID < xcall->user_call_ID)
pp = &(*pp)->rb_left;
- else if (user_call_ID > xcall->user_call_ID)
+ else if (p->user_call_ID > xcall->user_call_ID)
pp = &(*pp)->rb_right;
else
goto error_dup_user_ID;
}
rcu_assign_pointer(call->socket, rx);
- call->user_call_ID = user_call_ID;
+ call->user_call_ID = p->user_call_ID;
__set_bit(RXRPC_CALL_HAS_USERID, &call->flags);
rxrpc_get_call(call, rxrpc_call_got_userid);
rb_link_node(&call->sock_node, parent, pp);
diff --git a/net/rxrpc/conn_client.c b/net/rxrpc/conn_client.c
index 5f9624bd311c..7f74ca3059f8 100644
--- a/net/rxrpc/conn_client.c
+++ b/net/rxrpc/conn_client.c
@@ -85,8 +85,8 @@
__read_mostly unsigned int rxrpc_max_client_connections = 1000;
__read_mostly unsigned int rxrpc_reap_client_connections = 900;
-__read_mostly unsigned int rxrpc_conn_idle_client_expiry = 2 * 60 * HZ;
-__read_mostly unsigned int rxrpc_conn_idle_client_fast_expiry = 2 * HZ;
+__read_mostly unsigned long rxrpc_conn_idle_client_expiry = 2 * 60 * HZ;
+__read_mostly unsigned long rxrpc_conn_idle_client_fast_expiry = 2 * HZ;
/*
* We use machine-unique IDs for our client connections.
@@ -554,6 +554,11 @@ static void rxrpc_activate_one_channel(struct rxrpc_connection *conn,
trace_rxrpc_client(conn, channel, rxrpc_client_chan_activate);
+ /* Cancel the final ACK on the previous call if it hasn't been sent yet
+ * as the DATA packet will implicitly ACK it.
+ */
+ clear_bit(RXRPC_CONN_FINAL_ACK_0 + channel, &conn->flags);
+
write_lock_bh(&call->state_lock);
if (!test_bit(RXRPC_CALL_TX_LASTQ, &call->flags))
call->state = RXRPC_CALL_CLIENT_SEND_REQUEST;
@@ -686,7 +691,7 @@ int rxrpc_connect_call(struct rxrpc_call *call,
_enter("{%d,%lx},", call->debug_id, call->user_call_ID);
- rxrpc_discard_expired_client_conns(&rxnet->client_conn_reaper.work);
+ rxrpc_discard_expired_client_conns(&rxnet->client_conn_reaper);
rxrpc_cull_active_client_conns(rxnet);
ret = rxrpc_get_client_conn(call, cp, srx, gfp);
@@ -752,6 +757,18 @@ void rxrpc_expose_client_call(struct rxrpc_call *call)
}
/*
+ * Set the reap timer.
+ */
+static void rxrpc_set_client_reap_timer(struct rxrpc_net *rxnet)
+{
+ unsigned long now = jiffies;
+ unsigned long reap_at = now + rxrpc_conn_idle_client_expiry;
+
+ if (rxnet->live)
+ timer_reduce(&rxnet->client_conn_reap_timer, reap_at);
+}
+
+/*
* Disconnect a client call.
*/
void rxrpc_disconnect_client_call(struct rxrpc_call *call)
@@ -813,6 +830,19 @@ void rxrpc_disconnect_client_call(struct rxrpc_call *call)
goto out_2;
}
+ /* Schedule the final ACK to be transmitted in a short while so that it
+ * can be skipped if we find a follow-on call. The first DATA packet
+ * of the follow on call will implicitly ACK this call.
+ */
+ if (test_bit(RXRPC_CALL_EXPOSED, &call->flags)) {
+ unsigned long final_ack_at = jiffies + 2;
+
+ WRITE_ONCE(chan->final_ack_at, final_ack_at);
+ smp_wmb(); /* vs rxrpc_process_delayed_final_acks() */
+ set_bit(RXRPC_CONN_FINAL_ACK_0 + channel, &conn->flags);
+ rxrpc_reduce_conn_timer(conn, final_ack_at);
+ }
+
/* Things are more complex and we need the cache lock. We might be
* able to simply idle the conn or it might now be lurking on the wait
* list. It might even get moved back to the active list whilst we're
@@ -878,9 +908,7 @@ idle_connection:
list_move_tail(&conn->cache_link, &rxnet->idle_client_conns);
if (rxnet->idle_client_conns.next == &conn->cache_link &&
!rxnet->kill_all_client_conns)
- queue_delayed_work(rxrpc_workqueue,
- &rxnet->client_conn_reaper,
- rxrpc_conn_idle_client_expiry);
+ rxrpc_set_client_reap_timer(rxnet);
} else {
trace_rxrpc_client(conn, channel, rxrpc_client_to_inactive);
conn->cache_state = RXRPC_CONN_CLIENT_INACTIVE;
@@ -1018,8 +1046,7 @@ void rxrpc_discard_expired_client_conns(struct work_struct *work)
{
struct rxrpc_connection *conn;
struct rxrpc_net *rxnet =
- container_of(to_delayed_work(work),
- struct rxrpc_net, client_conn_reaper);
+ container_of(work, struct rxrpc_net, client_conn_reaper);
unsigned long expiry, conn_expires_at, now;
unsigned int nr_conns;
bool did_discard = false;
@@ -1061,6 +1088,8 @@ next:
expiry = rxrpc_conn_idle_client_expiry;
if (nr_conns > rxrpc_reap_client_connections)
expiry = rxrpc_conn_idle_client_fast_expiry;
+ if (conn->params.local->service_closed)
+ expiry = rxrpc_closed_conn_expiry * HZ;
conn_expires_at = conn->idle_timestamp + expiry;
@@ -1096,9 +1125,8 @@ not_yet_expired:
*/
_debug("not yet");
if (!rxnet->kill_all_client_conns)
- queue_delayed_work(rxrpc_workqueue,
- &rxnet->client_conn_reaper,
- conn_expires_at - now);
+ timer_reduce(&rxnet->client_conn_reap_timer,
+ conn_expires_at);
out:
spin_unlock(&rxnet->client_conn_cache_lock);
@@ -1118,9 +1146,9 @@ void rxrpc_destroy_all_client_connections(struct rxrpc_net *rxnet)
rxnet->kill_all_client_conns = true;
spin_unlock(&rxnet->client_conn_cache_lock);
- cancel_delayed_work(&rxnet->client_conn_reaper);
+ del_timer_sync(&rxnet->client_conn_reap_timer);
- if (!queue_delayed_work(rxrpc_workqueue, &rxnet->client_conn_reaper, 0))
+ if (!rxrpc_queue_work(&rxnet->client_conn_reaper))
_debug("destroy: queue failed");
_leave("");
diff --git a/net/rxrpc/conn_event.c b/net/rxrpc/conn_event.c
index 59a51a56e7c8..4ca11be6be3c 100644
--- a/net/rxrpc/conn_event.c
+++ b/net/rxrpc/conn_event.c
@@ -24,31 +24,28 @@
* Retransmit terminal ACK or ABORT of the previous call.
*/
static void rxrpc_conn_retransmit_call(struct rxrpc_connection *conn,
- struct sk_buff *skb)
+ struct sk_buff *skb,
+ unsigned int channel)
{
- struct rxrpc_skb_priv *sp = rxrpc_skb(skb);
+ struct rxrpc_skb_priv *sp = skb ? rxrpc_skb(skb) : NULL;
struct rxrpc_channel *chan;
struct msghdr msg;
- struct kvec iov;
+ struct kvec iov[3];
struct {
struct rxrpc_wire_header whdr;
union {
- struct {
- __be32 code;
- } abort;
- struct {
- struct rxrpc_ackpacket ack;
- u8 padding[3];
- struct rxrpc_ackinfo info;
- };
+ __be32 abort_code;
+ struct rxrpc_ackpacket ack;
};
} __attribute__((packed)) pkt;
+ struct rxrpc_ackinfo ack_info;
size_t len;
- u32 serial, mtu, call_id;
+ int ioc;
+ u32 serial, mtu, call_id, padding;
_enter("%d", conn->debug_id);
- chan = &conn->channels[sp->hdr.cid & RXRPC_CHANNELMASK];
+ chan = &conn->channels[channel];
/* If the last call got moved on whilst we were waiting to run, just
* ignore this packet.
@@ -56,7 +53,7 @@ static void rxrpc_conn_retransmit_call(struct rxrpc_connection *conn,
call_id = READ_ONCE(chan->last_call);
/* Sync with __rxrpc_disconnect_call() */
smp_rmb();
- if (call_id != sp->hdr.callNumber)
+ if (skb && call_id != sp->hdr.callNumber)
return;
msg.msg_name = &conn->params.peer->srx.transport;
@@ -65,9 +62,16 @@ static void rxrpc_conn_retransmit_call(struct rxrpc_connection *conn,
msg.msg_controllen = 0;
msg.msg_flags = 0;
- pkt.whdr.epoch = htonl(sp->hdr.epoch);
- pkt.whdr.cid = htonl(sp->hdr.cid);
- pkt.whdr.callNumber = htonl(sp->hdr.callNumber);
+ iov[0].iov_base = &pkt;
+ iov[0].iov_len = sizeof(pkt.whdr);
+ iov[1].iov_base = &padding;
+ iov[1].iov_len = 3;
+ iov[2].iov_base = &ack_info;
+ iov[2].iov_len = sizeof(ack_info);
+
+ pkt.whdr.epoch = htonl(conn->proto.epoch);
+ pkt.whdr.cid = htonl(conn->proto.cid);
+ pkt.whdr.callNumber = htonl(call_id);
pkt.whdr.seq = 0;
pkt.whdr.type = chan->last_type;
pkt.whdr.flags = conn->out_clientflag;
@@ -79,27 +83,35 @@ static void rxrpc_conn_retransmit_call(struct rxrpc_connection *conn,
len = sizeof(pkt.whdr);
switch (chan->last_type) {
case RXRPC_PACKET_TYPE_ABORT:
- pkt.abort.code = htonl(chan->last_abort);
- len += sizeof(pkt.abort);
+ pkt.abort_code = htonl(chan->last_abort);
+ iov[0].iov_len += sizeof(pkt.abort_code);
+ len += sizeof(pkt.abort_code);
+ ioc = 1;
break;
case RXRPC_PACKET_TYPE_ACK:
mtu = conn->params.peer->if_mtu;
mtu -= conn->params.peer->hdrsize;
pkt.ack.bufferSpace = 0;
- pkt.ack.maxSkew = htons(skb->priority);
- pkt.ack.firstPacket = htonl(chan->last_seq);
- pkt.ack.previousPacket = htonl(chan->last_seq - 1);
- pkt.ack.serial = htonl(sp->hdr.serial);
- pkt.ack.reason = RXRPC_ACK_DUPLICATE;
+ pkt.ack.maxSkew = htons(skb ? skb->priority : 0);
+ pkt.ack.firstPacket = htonl(chan->last_seq + 1);
+ pkt.ack.previousPacket = htonl(chan->last_seq);
+ pkt.ack.serial = htonl(skb ? sp->hdr.serial : 0);
+ pkt.ack.reason = skb ? RXRPC_ACK_DUPLICATE : RXRPC_ACK_IDLE;
pkt.ack.nAcks = 0;
- pkt.info.rxMTU = htonl(rxrpc_rx_mtu);
- pkt.info.maxMTU = htonl(mtu);
- pkt.info.rwind = htonl(rxrpc_rx_window_size);
- pkt.info.jumbo_max = htonl(rxrpc_rx_jumbo_max);
+ ack_info.rxMTU = htonl(rxrpc_rx_mtu);
+ ack_info.maxMTU = htonl(mtu);
+ ack_info.rwind = htonl(rxrpc_rx_window_size);
+ ack_info.jumbo_max = htonl(rxrpc_rx_jumbo_max);
pkt.whdr.flags |= RXRPC_SLOW_START_OK;
- len += sizeof(pkt.ack) + sizeof(pkt.info);
+ padding = 0;
+ iov[0].iov_len += sizeof(pkt.ack);
+ len += sizeof(pkt.ack) + 3 + sizeof(ack_info);
+ ioc = 3;
break;
+
+ default:
+ return;
}
/* Resync with __rxrpc_disconnect_call() and check that the last call
@@ -109,9 +121,6 @@ static void rxrpc_conn_retransmit_call(struct rxrpc_connection *conn,
if (READ_ONCE(chan->last_call) != call_id)
return;
- iov.iov_base = &pkt;
- iov.iov_len = len;
-
serial = atomic_inc_return(&conn->serial);
pkt.whdr.serial = htonl(serial);
@@ -126,7 +135,7 @@ static void rxrpc_conn_retransmit_call(struct rxrpc_connection *conn,
break;
}
- kernel_sendmsg(conn->params.local->socket, &msg, &iov, 1, len);
+ kernel_sendmsg(conn->params.local->socket, &msg, iov, ioc, len);
_leave("");
return;
}
@@ -272,7 +281,8 @@ static int rxrpc_process_event(struct rxrpc_connection *conn,
switch (sp->hdr.type) {
case RXRPC_PACKET_TYPE_DATA:
case RXRPC_PACKET_TYPE_ACK:
- rxrpc_conn_retransmit_call(conn, skb);
+ rxrpc_conn_retransmit_call(conn, skb,
+ sp->hdr.cid & RXRPC_CHANNELMASK);
return 0;
case RXRPC_PACKET_TYPE_BUSY:
@@ -379,6 +389,48 @@ abort:
}
/*
+ * Process delayed final ACKs that we haven't subsumed into a subsequent call.
+ */
+static void rxrpc_process_delayed_final_acks(struct rxrpc_connection *conn)
+{
+ unsigned long j = jiffies, next_j;
+ unsigned int channel;
+ bool set;
+
+again:
+ next_j = j + LONG_MAX;
+ set = false;
+ for (channel = 0; channel < RXRPC_MAXCALLS; channel++) {
+ struct rxrpc_channel *chan = &conn->channels[channel];
+ unsigned long ack_at;
+
+ if (!test_bit(RXRPC_CONN_FINAL_ACK_0 + channel, &conn->flags))
+ continue;
+
+ smp_rmb(); /* vs rxrpc_disconnect_client_call */
+ ack_at = READ_ONCE(chan->final_ack_at);
+
+ if (time_before(j, ack_at)) {
+ if (time_before(ack_at, next_j)) {
+ next_j = ack_at;
+ set = true;
+ }
+ continue;
+ }
+
+ if (test_and_clear_bit(RXRPC_CONN_FINAL_ACK_0 + channel,
+ &conn->flags))
+ rxrpc_conn_retransmit_call(conn, NULL, channel);
+ }
+
+ j = jiffies;
+ if (time_before_eq(next_j, j))
+ goto again;
+ if (set)
+ rxrpc_reduce_conn_timer(conn, next_j);
+}
+
+/*
* connection-level event processor
*/
void rxrpc_process_connection(struct work_struct *work)
@@ -394,6 +446,10 @@ void rxrpc_process_connection(struct work_struct *work)
if (test_and_clear_bit(RXRPC_CONN_EV_CHALLENGE, &conn->events))
rxrpc_secure_connection(conn);
+ /* Process delayed ACKs whose time has come. */
+ if (conn->flags & RXRPC_CONN_FINAL_ACK_MASK)
+ rxrpc_process_delayed_final_acks(conn);
+
/* go through the conn-level event packets, releasing the ref on this
* connection that each one has when we've finished with it */
while ((skb = skb_dequeue(&conn->rx_queue))) {
diff --git a/net/rxrpc/conn_object.c b/net/rxrpc/conn_object.c
index fe575798592f..c628351eb900 100644
--- a/net/rxrpc/conn_object.c
+++ b/net/rxrpc/conn_object.c
@@ -20,10 +20,19 @@
/*
* Time till a connection expires after last use (in seconds).
*/
-unsigned int rxrpc_connection_expiry = 10 * 60;
+unsigned int __read_mostly rxrpc_connection_expiry = 10 * 60;
+unsigned int __read_mostly rxrpc_closed_conn_expiry = 10;
static void rxrpc_destroy_connection(struct rcu_head *);
+static void rxrpc_connection_timer(struct timer_list *timer)
+{
+ struct rxrpc_connection *conn =
+ container_of(timer, struct rxrpc_connection, timer);
+
+ rxrpc_queue_conn(conn);
+}
+
/*
* allocate a new connection
*/
@@ -38,6 +47,7 @@ struct rxrpc_connection *rxrpc_alloc_connection(gfp_t gfp)
INIT_LIST_HEAD(&conn->cache_link);
spin_lock_init(&conn->channel_lock);
INIT_LIST_HEAD(&conn->waiting_calls);
+ timer_setup(&conn->timer, &rxrpc_connection_timer, 0);
INIT_WORK(&conn->processor, &rxrpc_process_connection);
INIT_LIST_HEAD(&conn->proc_link);
INIT_LIST_HEAD(&conn->link);
@@ -301,21 +311,29 @@ rxrpc_get_connection_maybe(struct rxrpc_connection *conn)
}
/*
+ * Set the service connection reap timer.
+ */
+static void rxrpc_set_service_reap_timer(struct rxrpc_net *rxnet,
+ unsigned long reap_at)
+{
+ if (rxnet->live)
+ timer_reduce(&rxnet->service_conn_reap_timer, reap_at);
+}
+
+/*
* Release a service connection
*/
void rxrpc_put_service_conn(struct rxrpc_connection *conn)
{
- struct rxrpc_net *rxnet;
const void *here = __builtin_return_address(0);
int n;
n = atomic_dec_return(&conn->usage);
trace_rxrpc_conn(conn, rxrpc_conn_put_service, n, here);
ASSERTCMP(n, >=, 0);
- if (n == 0) {
- rxnet = conn->params.local->rxnet;
- rxrpc_queue_delayed_work(&rxnet->service_conn_reaper, 0);
- }
+ if (n == 1)
+ rxrpc_set_service_reap_timer(conn->params.local->rxnet,
+ jiffies + rxrpc_connection_expiry);
}
/*
@@ -332,6 +350,7 @@ static void rxrpc_destroy_connection(struct rcu_head *rcu)
_net("DESTROY CONN %d", conn->debug_id);
+ del_timer_sync(&conn->timer);
rxrpc_purge_queue(&conn->rx_queue);
conn->security->clear(conn);
@@ -351,17 +370,15 @@ void rxrpc_service_connection_reaper(struct work_struct *work)
{
struct rxrpc_connection *conn, *_p;
struct rxrpc_net *rxnet =
- container_of(to_delayed_work(work),
- struct rxrpc_net, service_conn_reaper);
- unsigned long reap_older_than, earliest, idle_timestamp, now;
+ container_of(work, struct rxrpc_net, service_conn_reaper);
+ unsigned long expire_at, earliest, idle_timestamp, now;
LIST_HEAD(graveyard);
_enter("");
now = jiffies;
- reap_older_than = now - rxrpc_connection_expiry * HZ;
- earliest = ULONG_MAX;
+ earliest = now + MAX_JIFFY_OFFSET;
write_lock(&rxnet->conn_lock);
list_for_each_entry_safe(conn, _p, &rxnet->service_conns, link) {
@@ -371,15 +388,21 @@ void rxrpc_service_connection_reaper(struct work_struct *work)
if (conn->state == RXRPC_CONN_SERVICE_PREALLOC)
continue;
- idle_timestamp = READ_ONCE(conn->idle_timestamp);
- _debug("reap CONN %d { u=%d,t=%ld }",
- conn->debug_id, atomic_read(&conn->usage),
- (long)reap_older_than - (long)idle_timestamp);
-
- if (time_after(idle_timestamp, reap_older_than)) {
- if (time_before(idle_timestamp, earliest))
- earliest = idle_timestamp;
- continue;
+ if (rxnet->live) {
+ idle_timestamp = READ_ONCE(conn->idle_timestamp);
+ expire_at = idle_timestamp + rxrpc_connection_expiry * HZ;
+ if (conn->params.local->service_closed)
+ expire_at = idle_timestamp + rxrpc_closed_conn_expiry * HZ;
+
+ _debug("reap CONN %d { u=%d,t=%ld }",
+ conn->debug_id, atomic_read(&conn->usage),
+ (long)expire_at - (long)now);
+
+ if (time_before(now, expire_at)) {
+ if (time_before(expire_at, earliest))
+ earliest = expire_at;
+ continue;
+ }
}
/* The usage count sits at 1 whilst the object is unused on the
@@ -387,6 +410,7 @@ void rxrpc_service_connection_reaper(struct work_struct *work)
*/
if (atomic_cmpxchg(&conn->usage, 1, 0) != 1)
continue;
+ trace_rxrpc_conn(conn, rxrpc_conn_reap_service, 0, 0);
if (rxrpc_conn_is_client(conn))
BUG();
@@ -397,11 +421,10 @@ void rxrpc_service_connection_reaper(struct work_struct *work)
}
write_unlock(&rxnet->conn_lock);
- if (earliest != ULONG_MAX) {
- _debug("reschedule reaper %ld", (long) earliest - now);
+ if (earliest != now + MAX_JIFFY_OFFSET) {
+ _debug("reschedule reaper %ld", (long)earliest - (long)now);
ASSERT(time_after(earliest, now));
- rxrpc_queue_delayed_work(&rxnet->client_conn_reaper,
- earliest - now);
+ rxrpc_set_service_reap_timer(rxnet, earliest);
}
while (!list_empty(&graveyard)) {
@@ -429,9 +452,8 @@ void rxrpc_destroy_all_connections(struct rxrpc_net *rxnet)
rxrpc_destroy_all_client_connections(rxnet);
- rxrpc_connection_expiry = 0;
- cancel_delayed_work(&rxnet->client_conn_reaper);
- rxrpc_queue_delayed_work(&rxnet->client_conn_reaper, 0);
+ del_timer_sync(&rxnet->service_conn_reap_timer);
+ rxrpc_queue_work(&rxnet->service_conn_reaper);
flush_workqueue(rxrpc_workqueue);
write_lock(&rxnet->conn_lock);
diff --git a/net/rxrpc/input.c b/net/rxrpc/input.c
index 1b592073ec96..6fc61400337f 100644
--- a/net/rxrpc/input.c
+++ b/net/rxrpc/input.c
@@ -318,16 +318,18 @@ bad_state:
static bool rxrpc_receiving_reply(struct rxrpc_call *call)
{
struct rxrpc_ack_summary summary = { 0 };
+ unsigned long now, timo;
rxrpc_seq_t top = READ_ONCE(call->tx_top);
if (call->ackr_reason) {
spin_lock_bh(&call->lock);
call->ackr_reason = 0;
- call->resend_at = call->expire_at;
- call->ack_at = call->expire_at;
spin_unlock_bh(&call->lock);
- rxrpc_set_timer(call, rxrpc_timer_init_for_reply,
- ktime_get_real());
+ now = jiffies;
+ timo = now + MAX_JIFFY_OFFSET;
+ WRITE_ONCE(call->resend_at, timo);
+ WRITE_ONCE(call->ack_at, timo);
+ trace_rxrpc_timer(call, rxrpc_timer_init_for_reply, now);
}
if (!test_bit(RXRPC_CALL_TX_LAST, &call->flags))
@@ -437,6 +439,19 @@ static void rxrpc_input_data(struct rxrpc_call *call, struct sk_buff *skb,
if (state >= RXRPC_CALL_COMPLETE)
return;
+ if (call->state == RXRPC_CALL_SERVER_RECV_REQUEST) {
+ unsigned long timo = READ_ONCE(call->next_req_timo);
+ unsigned long now, expect_req_by;
+
+ if (timo) {
+ now = jiffies;
+ expect_req_by = now + timo;
+ WRITE_ONCE(call->expect_req_by, expect_req_by);
+ rxrpc_reduce_call_timer(call, expect_req_by, now,
+ rxrpc_timer_set_for_idle);
+ }
+ }
+
/* Received data implicitly ACKs all of the request packets we sent
* when we're acting as a client.
*/
@@ -616,6 +631,43 @@ found:
}
/*
+ * Process the response to a ping that we sent to find out if we lost an ACK.
+ *
+ * If we got back a ping response that indicates a lower tx_top than what we
+ * had at the time of the ping transmission, we adjudge all the DATA packets
+ * sent between the response tx_top and the ping-time tx_top to have been lost.
+ */
+static void rxrpc_input_check_for_lost_ack(struct rxrpc_call *call)
+{
+ rxrpc_seq_t top, bottom, seq;
+ bool resend = false;
+
+ spin_lock_bh(&call->lock);
+
+ bottom = call->tx_hard_ack + 1;
+ top = call->acks_lost_top;
+ if (before(bottom, top)) {
+ for (seq = bottom; before_eq(seq, top); seq++) {
+ int ix = seq & RXRPC_RXTX_BUFF_MASK;
+ u8 annotation = call->rxtx_annotations[ix];
+ u8 anno_type = annotation & RXRPC_TX_ANNO_MASK;
+
+ if (anno_type != RXRPC_TX_ANNO_UNACK)
+ continue;
+ annotation &= ~RXRPC_TX_ANNO_MASK;
+ annotation |= RXRPC_TX_ANNO_RETRANS;
+ call->rxtx_annotations[ix] = annotation;
+ resend = true;
+ }
+ }
+
+ spin_unlock_bh(&call->lock);
+
+ if (resend && !test_and_set_bit(RXRPC_CALL_EV_RESEND, &call->events))
+ rxrpc_queue_call(call);
+}
+
+/*
* Process a ping response.
*/
static void rxrpc_input_ping_response(struct rxrpc_call *call,
@@ -630,6 +682,9 @@ static void rxrpc_input_ping_response(struct rxrpc_call *call,
smp_rmb();
ping_serial = call->ping_serial;
+ if (orig_serial == call->acks_lost_ping)
+ rxrpc_input_check_for_lost_ack(call);
+
if (!test_bit(RXRPC_CALL_PINGING, &call->flags) ||
before(orig_serial, ping_serial))
return;
@@ -908,9 +963,20 @@ static void rxrpc_input_call_packet(struct rxrpc_call *call,
struct sk_buff *skb, u16 skew)
{
struct rxrpc_skb_priv *sp = rxrpc_skb(skb);
+ unsigned long timo;
_enter("%p,%p", call, skb);
+ timo = READ_ONCE(call->next_rx_timo);
+ if (timo) {
+ unsigned long now = jiffies, expect_rx_by;
+
+ expect_rx_by = jiffies + timo;
+ WRITE_ONCE(call->expect_rx_by, expect_rx_by);
+ rxrpc_reduce_call_timer(call, expect_rx_by, now,
+ rxrpc_timer_set_for_normal);
+ }
+
switch (sp->hdr.type) {
case RXRPC_PACKET_TYPE_DATA:
rxrpc_input_data(call, skb, skew);
@@ -1147,7 +1213,7 @@ void rxrpc_data_ready(struct sock *udp_sk)
goto reupgrade;
conn->service_id = sp->hdr.serviceId;
}
-
+
if (sp->hdr.callNumber == 0) {
/* Connection-level packet */
_debug("CONN %p {%d}", conn, conn->debug_id);
diff --git a/net/rxrpc/misc.c b/net/rxrpc/misc.c
index 1a2d4b112064..c1d9e7fd7448 100644
--- a/net/rxrpc/misc.c
+++ b/net/rxrpc/misc.c
@@ -21,33 +21,28 @@
unsigned int rxrpc_max_backlog __read_mostly = 10;
/*
- * Maximum lifetime of a call (in mx).
- */
-unsigned int rxrpc_max_call_lifetime = 60 * 1000;
-
-/*
* How long to wait before scheduling ACK generation after seeing a
- * packet with RXRPC_REQUEST_ACK set (in ms).
+ * packet with RXRPC_REQUEST_ACK set (in jiffies).
*/
-unsigned int rxrpc_requested_ack_delay = 1;
+unsigned long rxrpc_requested_ack_delay = 1;
/*
- * How long to wait before scheduling an ACK with subtype DELAY (in ms).
+ * 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
* all consumed within this time we will send a DELAY ACK if an ACK was not
* requested to let the sender know it doesn't need to resend.
*/
-unsigned int rxrpc_soft_ack_delay = 1 * 1000;
+unsigned long rxrpc_soft_ack_delay = HZ;
/*
- * How long to wait before scheduling an ACK with subtype IDLE (in ms).
+ * How long to wait before scheduling an ACK with subtype IDLE (in jiffies).
*
* We use this when we've consumed some previously soft-ACK'd packets when
* further packets aren't immediately received to decide when to send an IDLE
* ACK let the other end know that it can free up its Tx buffer space.
*/
-unsigned int rxrpc_idle_ack_delay = 0.5 * 1000;
+unsigned long rxrpc_idle_ack_delay = HZ / 2;
/*
* Receive window size in packets. This indicates the maximum number of
@@ -75,7 +70,7 @@ unsigned int rxrpc_rx_jumbo_max = 4;
/*
* Time till packet resend (in milliseconds).
*/
-unsigned int rxrpc_resend_timeout = 4 * 1000;
+unsigned long rxrpc_resend_timeout = 4 * HZ;
const s8 rxrpc_ack_priority[] = {
[0] = 0,
diff --git a/net/rxrpc/net_ns.c b/net/rxrpc/net_ns.c
index 7edceb8522f5..f18c9248e0d4 100644
--- a/net/rxrpc/net_ns.c
+++ b/net/rxrpc/net_ns.c
@@ -14,6 +14,24 @@
unsigned int rxrpc_net_id;
+static void rxrpc_client_conn_reap_timeout(struct timer_list *timer)
+{
+ struct rxrpc_net *rxnet =
+ container_of(timer, struct rxrpc_net, client_conn_reap_timer);
+
+ if (rxnet->live)
+ rxrpc_queue_work(&rxnet->client_conn_reaper);
+}
+
+static void rxrpc_service_conn_reap_timeout(struct timer_list *timer)
+{
+ struct rxrpc_net *rxnet =
+ container_of(timer, struct rxrpc_net, service_conn_reap_timer);
+
+ if (rxnet->live)
+ rxrpc_queue_work(&rxnet->service_conn_reaper);
+}
+
/*
* Initialise a per-network namespace record.
*/
@@ -22,6 +40,7 @@ static __net_init int rxrpc_init_net(struct net *net)
struct rxrpc_net *rxnet = rxrpc_net(net);
int ret;
+ rxnet->live = true;
get_random_bytes(&rxnet->epoch, sizeof(rxnet->epoch));
rxnet->epoch |= RXRPC_RANDOM_EPOCH;
@@ -31,8 +50,10 @@ static __net_init int rxrpc_init_net(struct net *net)
INIT_LIST_HEAD(&rxnet->conn_proc_list);
INIT_LIST_HEAD(&rxnet->service_conns);
rwlock_init(&rxnet->conn_lock);
- INIT_DELAYED_WORK(&rxnet->service_conn_reaper,
- rxrpc_service_connection_reaper);
+ INIT_WORK(&rxnet->service_conn_reaper,
+ rxrpc_service_connection_reaper);
+ timer_setup(&rxnet->service_conn_reap_timer,
+ rxrpc_service_conn_reap_timeout, 0);
rxnet->nr_client_conns = 0;
rxnet->nr_active_client_conns = 0;
@@ -42,8 +63,10 @@ static __net_init int rxrpc_init_net(struct net *net)
INIT_LIST_HEAD(&rxnet->waiting_client_conns);
INIT_LIST_HEAD(&rxnet->active_client_conns);
INIT_LIST_HEAD(&rxnet->idle_client_conns);
- INIT_DELAYED_WORK(&rxnet->client_conn_reaper,
- rxrpc_discard_expired_client_conns);
+ INIT_WORK(&rxnet->client_conn_reaper,
+ rxrpc_discard_expired_client_conns);
+ timer_setup(&rxnet->client_conn_reap_timer,
+ rxrpc_client_conn_reap_timeout, 0);
INIT_LIST_HEAD(&rxnet->local_endpoints);
mutex_init(&rxnet->local_mutex);
@@ -60,6 +83,7 @@ static __net_init int rxrpc_init_net(struct net *net)
return 0;
err_proc:
+ rxnet->live = false;
return ret;
}
@@ -70,6 +94,7 @@ static __net_exit void rxrpc_exit_net(struct net *net)
{
struct rxrpc_net *rxnet = rxrpc_net(net);
+ rxnet->live = false;
rxrpc_destroy_all_calls(rxnet);
rxrpc_destroy_all_connections(rxnet);
rxrpc_destroy_all_locals(rxnet);
diff --git a/net/rxrpc/output.c b/net/rxrpc/output.c
index f47659c7b224..42410e910aff 100644
--- a/net/rxrpc/output.c
+++ b/net/rxrpc/output.c
@@ -33,6 +33,24 @@ struct rxrpc_abort_buffer {
};
/*
+ * Arrange for a keepalive ping a certain time after we last transmitted. This
+ * lets the far side know we're still interested in this call and helps keep
+ * the route through any intervening firewall open.
+ *
+ * Receiving a response to the ping will prevent the ->expect_rx_by timer from
+ * expiring.
+ */
+static void rxrpc_set_keepalive(struct rxrpc_call *call)
+{
+ unsigned long now = jiffies, keepalive_at = call->next_rx_timo / 6;
+
+ keepalive_at += now;
+ WRITE_ONCE(call->keepalive_at, keepalive_at);
+ rxrpc_reduce_call_timer(call, keepalive_at, now,
+ rxrpc_timer_set_for_keepalive);
+}
+
+/*
* Fill out an ACK packet.
*/
static size_t rxrpc_fill_out_ack(struct rxrpc_connection *conn,
@@ -95,7 +113,8 @@ static size_t rxrpc_fill_out_ack(struct rxrpc_connection *conn,
/*
* Send an ACK call packet.
*/
-int rxrpc_send_ack_packet(struct rxrpc_call *call, bool ping)
+int rxrpc_send_ack_packet(struct rxrpc_call *call, bool ping,
+ rxrpc_serial_t *_serial)
{
struct rxrpc_connection *conn = NULL;
struct rxrpc_ack_buffer *pkt;
@@ -165,6 +184,8 @@ int rxrpc_send_ack_packet(struct rxrpc_call *call, bool ping)
ntohl(pkt->ack.firstPacket),
ntohl(pkt->ack.serial),
pkt->ack.reason, pkt->ack.nAcks);
+ if (_serial)
+ *_serial = serial;
if (ping) {
call->ping_serial = serial;
@@ -202,6 +223,8 @@ int rxrpc_send_ack_packet(struct rxrpc_call *call, bool ping)
call->ackr_seen = top;
spin_unlock_bh(&call->lock);
}
+
+ rxrpc_set_keepalive(call);
}
out:
@@ -323,7 +346,8 @@ int rxrpc_send_data_packet(struct rxrpc_call *call, struct sk_buff *skb,
* ACKs if a DATA packet appears to have been lost.
*/
if (!(sp->hdr.flags & RXRPC_LAST_PACKET) &&
- (retrans ||
+ (test_and_clear_bit(RXRPC_CALL_EV_ACK_LOST, &call->events) ||
+ retrans ||
call->cong_mode == RXRPC_CALL_SLOW_START ||
(call->peer->rtt_usage < 3 && sp->hdr.seq & 1) ||
ktime_before(ktime_add_ms(call->peer->rtt_last_req, 1000),
@@ -370,8 +394,23 @@ done:
if (whdr.flags & RXRPC_REQUEST_ACK) {
call->peer->rtt_last_req = now;
trace_rxrpc_rtt_tx(call, rxrpc_rtt_tx_data, serial);
+ if (call->peer->rtt_usage > 1) {
+ unsigned long nowj = jiffies, ack_lost_at;
+
+ ack_lost_at = nsecs_to_jiffies(2 * call->peer->rtt);
+ if (ack_lost_at < 1)
+ ack_lost_at = 1;
+
+ ack_lost_at += nowj;
+ WRITE_ONCE(call->ack_lost_at, ack_lost_at);
+ rxrpc_reduce_call_timer(call, ack_lost_at, nowj,
+ rxrpc_timer_set_for_lost_ack);
+ }
}
}
+
+ rxrpc_set_keepalive(call);
+
_leave(" = %d [%u]", ret, call->peer->maxdata);
return ret;
diff --git a/net/rxrpc/recvmsg.c b/net/rxrpc/recvmsg.c
index 8510a98b87e1..cc21e8db25b0 100644
--- a/net/rxrpc/recvmsg.c
+++ b/net/rxrpc/recvmsg.c
@@ -144,11 +144,13 @@ 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 0 // TODO: May want to transmit final ACK under some circumstances anyway
if (call->state == RXRPC_CALL_CLIENT_RECV_REPLY) {
rxrpc_propose_ACK(call, RXRPC_ACK_IDLE, 0, serial, true, false,
rxrpc_propose_ack_terminal_ack);
- rxrpc_send_ack_packet(call, false);
+ rxrpc_send_ack_packet(call, false, NULL);
}
+#endif
write_lock_bh(&call->state_lock);
@@ -161,7 +163,7 @@ static void rxrpc_end_rx_phase(struct rxrpc_call *call, rxrpc_serial_t serial)
case RXRPC_CALL_SERVER_RECV_REQUEST:
call->tx_phase = true;
call->state = RXRPC_CALL_SERVER_ACK_REQUEST;
- call->ack_at = call->expire_at;
+ call->expect_req_by = jiffies + MAX_JIFFY_OFFSET;
write_unlock_bh(&call->state_lock);
rxrpc_propose_ACK(call, RXRPC_ACK_DELAY, 0, serial, false, true,
rxrpc_propose_ack_processing_op);
@@ -217,10 +219,10 @@ static void rxrpc_rotate_rx_window(struct rxrpc_call *call)
after_eq(top, call->ackr_seen + 2) ||
(hard_ack == top && after(hard_ack, call->ackr_consumed)))
rxrpc_propose_ACK(call, RXRPC_ACK_DELAY, 0, serial,
- true, false,
+ true, true,
rxrpc_propose_ack_rotate_rx);
- if (call->ackr_reason)
- rxrpc_send_ack_packet(call, false);
+ if (call->ackr_reason && call->ackr_reason != RXRPC_ACK_DELAY)
+ rxrpc_send_ack_packet(call, false, NULL);
}
}
diff --git a/net/rxrpc/sendmsg.c b/net/rxrpc/sendmsg.c
index 7d2595582c09..09f2a3e05221 100644
--- a/net/rxrpc/sendmsg.c
+++ b/net/rxrpc/sendmsg.c
@@ -21,22 +21,6 @@
#include <net/af_rxrpc.h>
#include "ar-internal.h"
-enum rxrpc_command {
- RXRPC_CMD_SEND_DATA, /* send data message */
- RXRPC_CMD_SEND_ABORT, /* request abort generation */
- RXRPC_CMD_ACCEPT, /* [server] accept incoming call */
- RXRPC_CMD_REJECT_BUSY, /* [server] reject a call as busy */
-};
-
-struct rxrpc_send_params {
- s64 tx_total_len; /* Total Tx data length (if send data) */
- unsigned long user_call_ID; /* User's call ID */
- u32 abort_code; /* Abort code to Tx (if abort) */
- enum rxrpc_command command : 8; /* The command to implement */
- bool exclusive; /* Shared or exclusive call */
- bool upgrade; /* If the connection is upgradeable */
-};
-
/*
* Wait for space to appear in the Tx queue or a signal to occur.
*/
@@ -174,6 +158,7 @@ static void rxrpc_queue_packet(struct rxrpc_sock *rx, struct rxrpc_call *call,
rxrpc_notify_end_tx_t notify_end_tx)
{
struct rxrpc_skb_priv *sp = rxrpc_skb(skb);
+ unsigned long now;
rxrpc_seq_t seq = sp->hdr.seq;
int ret, ix;
u8 annotation = RXRPC_TX_ANNO_UNACK;
@@ -213,11 +198,11 @@ static void rxrpc_queue_packet(struct rxrpc_sock *rx, struct rxrpc_call *call,
break;
case RXRPC_CALL_SERVER_ACK_REQUEST:
call->state = RXRPC_CALL_SERVER_SEND_REPLY;
- call->ack_at = call->expire_at;
+ now = jiffies;
+ WRITE_ONCE(call->ack_at, now + MAX_JIFFY_OFFSET);
if (call->ackr_reason == RXRPC_ACK_DELAY)
call->ackr_reason = 0;
- __rxrpc_set_timer(call, rxrpc_timer_init_for_send_reply,
- ktime_get_real());
+ trace_rxrpc_timer(call, rxrpc_timer_init_for_send_reply, now);
if (!last)
break;
/* Fall through */
@@ -239,14 +224,19 @@ static void rxrpc_queue_packet(struct rxrpc_sock *rx, struct rxrpc_call *call,
_debug("need instant resend %d", ret);
rxrpc_instant_resend(call, ix);
} else {
- ktime_t now = ktime_get_real(), resend_at;
-
- resend_at = ktime_add_ms(now, rxrpc_resend_timeout);
-
- if (ktime_before(resend_at, call->resend_at)) {
- call->resend_at = resend_at;
- rxrpc_set_timer(call, rxrpc_timer_set_for_send, now);
- }
+ unsigned long now = jiffies, resend_at;
+
+ if (call->peer->rtt_usage > 1)
+ resend_at = nsecs_to_jiffies(call->peer->rtt * 3 / 2);
+ else
+ resend_at = rxrpc_resend_timeout;
+ if (resend_at < 1)
+ resend_at = 1;
+
+ resend_at += now;
+ WRITE_ONCE(call->resend_at, resend_at);
+ rxrpc_reduce_call_timer(call, resend_at, now,
+ rxrpc_timer_set_for_send);
}
rxrpc_free_skb(skb, rxrpc_skb_tx_freed);
@@ -295,7 +285,7 @@ static int rxrpc_send_data(struct rxrpc_sock *rx,
do {
/* Check to see if there's a ping ACK to reply to. */
if (call->ackr_reason == RXRPC_ACK_PING_RESPONSE)
- rxrpc_send_ack_packet(call, false);
+ rxrpc_send_ack_packet(call, false, NULL);
if (!skb) {
size_t size, chunk, max, space;
@@ -480,11 +470,11 @@ static int rxrpc_sendmsg_cmsg(struct msghdr *msg, struct rxrpc_send_params *p)
if (msg->msg_flags & MSG_CMSG_COMPAT) {
if (len != sizeof(u32))
return -EINVAL;
- p->user_call_ID = *(u32 *)CMSG_DATA(cmsg);
+ p->call.user_call_ID = *(u32 *)CMSG_DATA(cmsg);
} else {
if (len != sizeof(unsigned long))
return -EINVAL;
- p->user_call_ID = *(unsigned long *)
+ p->call.user_call_ID = *(unsigned long *)
CMSG_DATA(cmsg);
}
got_user_ID = true;
@@ -522,11 +512,24 @@ static int rxrpc_sendmsg_cmsg(struct msghdr *msg, struct rxrpc_send_params *p)
break;
case RXRPC_TX_LENGTH:
- if (p->tx_total_len != -1 || len != sizeof(__s64))
+ if (p->call.tx_total_len != -1 || len != sizeof(__s64))
+ return -EINVAL;
+ p->call.tx_total_len = *(__s64 *)CMSG_DATA(cmsg);
+ if (p->call.tx_total_len < 0)
return -EINVAL;
- p->tx_total_len = *(__s64 *)CMSG_DATA(cmsg);
- if (p->tx_total_len < 0)
+ break;
+
+ case RXRPC_SET_CALL_TIMEOUT:
+ if (len & 3 || len < 4 || len > 12)
return -EINVAL;
+ memcpy(&p->call.timeouts, CMSG_DATA(cmsg), len);
+ p->call.nr_timeouts = len / 4;
+ if (p->call.timeouts.hard > INT_MAX / HZ)
+ return -ERANGE;
+ if (p->call.nr_timeouts >= 2 && p->call.timeouts.idle > 60 * 60 * 1000)
+ return -ERANGE;
+ if (p->call.nr_timeouts >= 3 && p->call.timeouts.normal > 60 * 60 * 1000)
+ return -ERANGE;
break;
default:
@@ -536,7 +539,7 @@ static int rxrpc_sendmsg_cmsg(struct msghdr *msg, struct rxrpc_send_params *p)
if (!got_user_ID)
return -EINVAL;
- if (p->tx_total_len != -1 && p->command != RXRPC_CMD_SEND_DATA)
+ if (p->call.tx_total_len != -1 && p->command != RXRPC_CMD_SEND_DATA)
return -EINVAL;
_leave(" = 0");
return 0;
@@ -576,8 +579,7 @@ rxrpc_new_client_call_for_sendmsg(struct rxrpc_sock *rx, struct msghdr *msg,
cp.exclusive = rx->exclusive | p->exclusive;
cp.upgrade = p->upgrade;
cp.service_id = srx->srx_service;
- call = rxrpc_new_client_call(rx, &cp, srx, p->user_call_ID,
- p->tx_total_len, GFP_KERNEL);
+ call = rxrpc_new_client_call(rx, &cp, srx, &p->call, GFP_KERNEL);
/* The socket is now unlocked */
_leave(" = %p\n", call);
@@ -594,15 +596,17 @@ int rxrpc_do_sendmsg(struct rxrpc_sock *rx, struct msghdr *msg, size_t len)
{
enum rxrpc_call_state state;
struct rxrpc_call *call;
+ unsigned long now, j;
int ret;
struct rxrpc_send_params p = {
- .tx_total_len = -1,
- .user_call_ID = 0,
- .abort_code = 0,
- .command = RXRPC_CMD_SEND_DATA,
- .exclusive = false,
- .upgrade = true,
+ .call.tx_total_len = -1,
+ .call.user_call_ID = 0,
+ .call.nr_timeouts = 0,
+ .abort_code = 0,
+ .command = RXRPC_CMD_SEND_DATA,
+ .exclusive = false,
+ .upgrade = false,
};
_enter("");
@@ -615,15 +619,15 @@ int rxrpc_do_sendmsg(struct rxrpc_sock *rx, struct msghdr *msg, size_t len)
ret = -EINVAL;
if (rx->sk.sk_state != RXRPC_SERVER_LISTENING)
goto error_release_sock;
- call = rxrpc_accept_call(rx, p.user_call_ID, NULL);
+ call = rxrpc_accept_call(rx, p.call.user_call_ID, NULL);
/* The socket is now unlocked. */
if (IS_ERR(call))
return PTR_ERR(call);
- rxrpc_put_call(call, rxrpc_call_put);
- return 0;
+ ret = 0;
+ goto out_put_unlock;
}
- call = rxrpc_find_call_by_user_ID(rx, p.user_call_ID);
+ call = rxrpc_find_call_by_user_ID(rx, p.call.user_call_ID);
if (!call) {
ret = -EBADSLT;
if (p.command != RXRPC_CMD_SEND_DATA)
@@ -653,14 +657,39 @@ int rxrpc_do_sendmsg(struct rxrpc_sock *rx, struct msghdr *msg, size_t len)
goto error_put;
}
- if (p.tx_total_len != -1) {
+ if (p.call.tx_total_len != -1) {
ret = -EINVAL;
if (call->tx_total_len != -1 ||
call->tx_pending ||
call->tx_top != 0)
goto error_put;
- call->tx_total_len = p.tx_total_len;
+ call->tx_total_len = p.call.tx_total_len;
+ }
+ }
+
+ switch (p.call.nr_timeouts) {
+ case 3:
+ j = msecs_to_jiffies(p.call.timeouts.normal);
+ if (p.call.timeouts.normal > 0 && j == 0)
+ j = 1;
+ WRITE_ONCE(call->next_rx_timo, j);
+ /* Fall through */
+ case 2:
+ j = msecs_to_jiffies(p.call.timeouts.idle);
+ if (p.call.timeouts.idle > 0 && j == 0)
+ j = 1;
+ WRITE_ONCE(call->next_req_timo, j);
+ /* Fall through */
+ case 1:
+ if (p.call.timeouts.hard > 0) {
+ j = msecs_to_jiffies(p.call.timeouts.hard);
+ now = jiffies;
+ j += now;
+ WRITE_ONCE(call->expect_term_by, j);
+ rxrpc_reduce_call_timer(call, j, now,
+ rxrpc_timer_set_for_hard);
}
+ break;
}
state = READ_ONCE(call->state);
@@ -689,6 +718,7 @@ int rxrpc_do_sendmsg(struct rxrpc_sock *rx, struct msghdr *msg, size_t len)
ret = rxrpc_send_data(rx, call, msg, len, NULL);
}
+out_put_unlock:
mutex_unlock(&call->user_mutex);
error_put:
rxrpc_put_call(call, rxrpc_call_put);
diff --git a/net/rxrpc/sysctl.c b/net/rxrpc/sysctl.c
index 34c706d2f79c..4a7af7aff37d 100644
--- a/net/rxrpc/sysctl.c
+++ b/net/rxrpc/sysctl.c
@@ -21,6 +21,8 @@ static const unsigned int four = 4;
static const unsigned int thirtytwo = 32;
static const unsigned int n_65535 = 65535;
static const unsigned int n_max_acks = RXRPC_RXTX_BUFF_SIZE - 1;
+static const unsigned long one_jiffy = 1;
+static const unsigned long max_jiffies = MAX_JIFFY_OFFSET;
/*
* RxRPC operating parameters.
@@ -29,64 +31,60 @@ static const unsigned int n_max_acks = RXRPC_RXTX_BUFF_SIZE - 1;
* information on the individual parameters.
*/
static struct ctl_table rxrpc_sysctl_table[] = {
- /* Values measured in milliseconds */
+ /* Values measured in milliseconds but used in jiffies */
{
.procname = "req_ack_delay",
.data = &rxrpc_requested_ack_delay,
- .maxlen = sizeof(unsigned int),
+ .maxlen = sizeof(unsigned long),
.mode = 0644,
- .proc_handler = proc_dointvec,
- .extra1 = (void *)&zero,
+ .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 int),
+ .maxlen = sizeof(unsigned long),
.mode = 0644,
- .proc_handler = proc_dointvec,
- .extra1 = (void *)&one,
+ .proc_handler = proc_doulongvec_ms_jiffies_minmax,
+ .extra1 = (void *)&one_jiffy,
+ .extra2 = (void *)&max_jiffies,
},
{
.procname = "idle_ack_delay",
.data = &rxrpc_idle_ack_delay,
- .maxlen = sizeof(unsigned int),
+ .maxlen = sizeof(unsigned long),
.mode = 0644,
- .proc_handler = proc_dointvec,
- .extra1 = (void *)&one,
- },
- {
- .procname = "resend_timeout",
- .data = &rxrpc_resend_timeout,
- .maxlen = sizeof(unsigned int),
- .mode = 0644,
- .proc_handler = proc_dointvec,
- .extra1 = (void *)&one,
+ .proc_handler = proc_doulongvec_ms_jiffies_minmax,
+ .extra1 = (void *)&one_jiffy,
+ .extra2 = (void *)&max_jiffies,
},
{
.procname = "idle_conn_expiry",
.data = &rxrpc_conn_idle_client_expiry,
- .maxlen = sizeof(unsigned int),
+ .maxlen = sizeof(unsigned long),
.mode = 0644,
- .proc_handler = proc_dointvec_ms_jiffies,
- .extra1 = (void *)&one,
+ .proc_handler = proc_doulongvec_ms_jiffies_minmax,
+ .extra1 = (void *)&one_jiffy,
+ .extra2 = (void *)&max_jiffies,
},
{
.procname = "idle_conn_fast_expiry",
.data = &rxrpc_conn_idle_client_fast_expiry,
- .maxlen = sizeof(unsigned int),
+ .maxlen = sizeof(unsigned long),
.mode = 0644,
- .proc_handler = proc_dointvec_ms_jiffies,
- .extra1 = (void *)&one,
+ .proc_handler = proc_doulongvec_ms_jiffies_minmax,
+ .extra1 = (void *)&one_jiffy,
+ .extra2 = (void *)&max_jiffies,
},
-
- /* Values measured in seconds but used in jiffies */
{
- .procname = "max_call_lifetime",
- .data = &rxrpc_max_call_lifetime,
- .maxlen = sizeof(unsigned int),
+ .procname = "resend_timeout",
+ .data = &rxrpc_resend_timeout,
+ .maxlen = sizeof(unsigned long),
.mode = 0644,
- .proc_handler = proc_dointvec,
- .extra1 = (void *)&one,
+ .proc_handler = proc_doulongvec_ms_jiffies_minmax,
+ .extra1 = (void *)&one_jiffy,
+ .extra2 = (void *)&max_jiffies,
},
/* Non-time values */
generated by cgit v1.2.3 (git 2.39.0) at 2024-11-23 06:04:52 +0300