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-rw-r--r--net/tipc/core.c8
-rw-r--r--net/tipc/msg.h14
-rw-r--r--net/tipc/node.h5
-rw-r--r--net/tipc/socket.c140
-rw-r--r--net/tipc/socket.h17
5 files changed, 122 insertions, 62 deletions
diff --git a/net/tipc/core.c b/net/tipc/core.c
index e2bdb07a49a2..fe1b062c4f18 100644
--- a/net/tipc/core.c
+++ b/net/tipc/core.c
@@ -112,11 +112,9 @@ static int __init tipc_init(void)
pr_info("Activated (version " TIPC_MOD_VER ")\n");
- sysctl_tipc_rmem[0] = TIPC_CONN_OVERLOAD_LIMIT >> 4 <<
- TIPC_LOW_IMPORTANCE;
- sysctl_tipc_rmem[1] = TIPC_CONN_OVERLOAD_LIMIT >> 4 <<
- TIPC_CRITICAL_IMPORTANCE;
- sysctl_tipc_rmem[2] = TIPC_CONN_OVERLOAD_LIMIT;
+ sysctl_tipc_rmem[0] = RCVBUF_MIN;
+ sysctl_tipc_rmem[1] = RCVBUF_DEF;
+ sysctl_tipc_rmem[2] = RCVBUF_MAX;
err = tipc_netlink_start();
if (err)
diff --git a/net/tipc/msg.h b/net/tipc/msg.h
index 58bf51541813..024da8af91f0 100644
--- a/net/tipc/msg.h
+++ b/net/tipc/msg.h
@@ -743,16 +743,26 @@ static inline void msg_set_msgcnt(struct tipc_msg *m, u16 n)
msg_set_bits(m, 9, 16, 0xffff, n);
}
-static inline u32 msg_bcast_tag(struct tipc_msg *m)
+static inline u32 msg_conn_ack(struct tipc_msg *m)
{
return msg_bits(m, 9, 16, 0xffff);
}
-static inline void msg_set_bcast_tag(struct tipc_msg *m, u32 n)
+static inline void msg_set_conn_ack(struct tipc_msg *m, u32 n)
{
msg_set_bits(m, 9, 16, 0xffff, n);
}
+static inline u32 msg_adv_win(struct tipc_msg *m)
+{
+ return msg_bits(m, 9, 0, 0xffff);
+}
+
+static inline void msg_set_adv_win(struct tipc_msg *m, u32 n)
+{
+ msg_set_bits(m, 9, 0, 0xffff, n);
+}
+
static inline u32 msg_max_pkt(struct tipc_msg *m)
{
return msg_bits(m, 9, 16, 0xffff) * 4;
diff --git a/net/tipc/node.h b/net/tipc/node.h
index 18237684ffc4..8264b3d97dc4 100644
--- a/net/tipc/node.h
+++ b/net/tipc/node.h
@@ -45,10 +45,11 @@
/* Optional capabilities supported by this code version
*/
enum {
- TIPC_BCAST_SYNCH = (1 << 1)
+ TIPC_BCAST_SYNCH = (1 << 1),
+ TIPC_BLOCK_FLOWCTL = (2 << 1)
};
-#define TIPC_NODE_CAPABILITIES TIPC_BCAST_SYNCH
+#define TIPC_NODE_CAPABILITIES (TIPC_BCAST_SYNCH | TIPC_BLOCK_FLOWCTL)
#define INVALID_BEARER_ID -1
void tipc_node_stop(struct net *net);
diff --git a/net/tipc/socket.c b/net/tipc/socket.c
index 94bd28639855..12628890c219 100644
--- a/net/tipc/socket.c
+++ b/net/tipc/socket.c
@@ -96,9 +96,11 @@ struct tipc_sock {
uint conn_timeout;
atomic_t dupl_rcvcnt;
bool link_cong;
- uint sent_unacked;
- uint rcv_unacked;
+ u16 snt_unacked;
+ u16 snd_win;
u16 peer_caps;
+ u16 rcv_unacked;
+ u16 rcv_win;
struct sockaddr_tipc remote;
struct rhash_head node;
struct rcu_head rcu;
@@ -228,9 +230,29 @@ static struct tipc_sock *tipc_sk(const struct sock *sk)
return container_of(sk, struct tipc_sock, sk);
}
-static int tsk_conn_cong(struct tipc_sock *tsk)
+static bool tsk_conn_cong(struct tipc_sock *tsk)
{
- return tsk->sent_unacked >= TIPC_FLOWCTRL_WIN;
+ return tsk->snt_unacked >= tsk->snd_win;
+}
+
+/* tsk_blocks(): translate a buffer size in bytes to number of
+ * advertisable blocks, taking into account the ratio truesize(len)/len
+ * We can trust that this ratio is always < 4 for len >= FLOWCTL_BLK_SZ
+ */
+static u16 tsk_adv_blocks(int len)
+{
+ return len / FLOWCTL_BLK_SZ / 4;
+}
+
+/* tsk_inc(): increment counter for sent or received data
+ * - If block based flow control is not supported by peer we
+ * fall back to message based ditto, incrementing the counter
+ */
+static u16 tsk_inc(struct tipc_sock *tsk, int msglen)
+{
+ if (likely(tsk->peer_caps & TIPC_BLOCK_FLOWCTL))
+ return ((msglen / FLOWCTL_BLK_SZ) + 1);
+ return 1;
}
/**
@@ -378,9 +400,12 @@ static int tipc_sk_create(struct net *net, struct socket *sock,
sk->sk_write_space = tipc_write_space;
sk->sk_destruct = tipc_sock_destruct;
tsk->conn_timeout = CONN_TIMEOUT_DEFAULT;
- tsk->sent_unacked = 0;
atomic_set(&tsk->dupl_rcvcnt, 0);
+ /* Start out with safe limits until we receive an advertised window */
+ tsk->snd_win = tsk_adv_blocks(RCVBUF_MIN);
+ tsk->rcv_win = tsk->snd_win;
+
if (sock->state == SS_READY) {
tsk_set_unreturnable(tsk, true);
if (sock->type == SOCK_DGRAM)
@@ -776,7 +801,7 @@ static void tipc_sk_proto_rcv(struct tipc_sock *tsk, struct sk_buff *skb)
struct sock *sk = &tsk->sk;
struct tipc_msg *hdr = buf_msg(skb);
int mtyp = msg_type(hdr);
- int conn_cong;
+ bool conn_cong;
/* Ignore if connection cannot be validated: */
if (!tsk_peer_msg(tsk, hdr))
@@ -790,7 +815,9 @@ static void tipc_sk_proto_rcv(struct tipc_sock *tsk, struct sk_buff *skb)
return;
} else if (mtyp == CONN_ACK) {
conn_cong = tsk_conn_cong(tsk);
- tsk->sent_unacked -= msg_msgcnt(hdr);
+ tsk->snt_unacked -= msg_conn_ack(hdr);
+ if (tsk->peer_caps & TIPC_BLOCK_FLOWCTL)
+ tsk->snd_win = msg_adv_win(hdr);
if (conn_cong)
sk->sk_write_space(sk);
} else if (mtyp != CONN_PROBE_REPLY) {
@@ -1021,12 +1048,14 @@ static int __tipc_send_stream(struct socket *sock, struct msghdr *m, size_t dsz)
u32 dnode;
uint mtu, send, sent = 0;
struct iov_iter save;
+ int hlen = MIN_H_SIZE;
/* Handle implied connection establishment */
if (unlikely(dest)) {
rc = __tipc_sendmsg(sock, m, dsz);
+ hlen = msg_hdr_sz(mhdr);
if (dsz && (dsz == rc))
- tsk->sent_unacked = 1;
+ tsk->snt_unacked = tsk_inc(tsk, dsz + hlen);
return rc;
}
if (dsz > (uint)INT_MAX)
@@ -1055,7 +1084,7 @@ next:
if (likely(!tsk_conn_cong(tsk))) {
rc = tipc_node_xmit(net, &pktchain, dnode, portid);
if (likely(!rc)) {
- tsk->sent_unacked++;
+ tsk->snt_unacked += tsk_inc(tsk, send + hlen);
sent += send;
if (sent == dsz)
return dsz;
@@ -1120,6 +1149,12 @@ static void tipc_sk_finish_conn(struct tipc_sock *tsk, u32 peer_port,
tipc_node_add_conn(net, peer_node, tsk->portid, peer_port);
tsk->max_pkt = tipc_node_get_mtu(net, peer_node, tsk->portid);
tsk->peer_caps = tipc_node_get_capabilities(net, peer_node);
+ if (tsk->peer_caps & TIPC_BLOCK_FLOWCTL)
+ return;
+
+ /* Fall back to message based flow control */
+ tsk->rcv_win = FLOWCTL_MSG_WIN;
+ tsk->snd_win = FLOWCTL_MSG_WIN;
}
/**
@@ -1216,7 +1251,7 @@ static int tipc_sk_anc_data_recv(struct msghdr *m, struct tipc_msg *msg,
return 0;
}
-static void tipc_sk_send_ack(struct tipc_sock *tsk, uint ack)
+static void tipc_sk_send_ack(struct tipc_sock *tsk)
{
struct net *net = sock_net(&tsk->sk);
struct sk_buff *skb = NULL;
@@ -1232,7 +1267,14 @@ static void tipc_sk_send_ack(struct tipc_sock *tsk, uint ack)
if (!skb)
return;
msg = buf_msg(skb);
- msg_set_msgcnt(msg, ack);
+ msg_set_conn_ack(msg, tsk->rcv_unacked);
+ tsk->rcv_unacked = 0;
+
+ /* Adjust to and advertize the correct window limit */
+ if (tsk->peer_caps & TIPC_BLOCK_FLOWCTL) {
+ tsk->rcv_win = tsk_adv_blocks(tsk->sk.sk_rcvbuf);
+ msg_set_adv_win(msg, tsk->rcv_win);
+ }
tipc_node_xmit_skb(net, skb, dnode, msg_link_selector(msg));
}
@@ -1290,7 +1332,7 @@ static int tipc_recvmsg(struct socket *sock, struct msghdr *m, size_t buf_len,
long timeo;
unsigned int sz;
u32 err;
- int res;
+ int res, hlen;
/* Catch invalid receive requests */
if (unlikely(!buf_len))
@@ -1315,6 +1357,7 @@ restart:
buf = skb_peek(&sk->sk_receive_queue);
msg = buf_msg(buf);
sz = msg_data_sz(msg);
+ hlen = msg_hdr_sz(msg);
err = msg_errcode(msg);
/* Discard an empty non-errored message & try again */
@@ -1337,7 +1380,7 @@ restart:
sz = buf_len;
m->msg_flags |= MSG_TRUNC;
}
- res = skb_copy_datagram_msg(buf, msg_hdr_sz(msg), m, sz);
+ res = skb_copy_datagram_msg(buf, hlen, m, sz);
if (res)
goto exit;
res = sz;
@@ -1349,15 +1392,15 @@ restart:
res = -ECONNRESET;
}
- /* Consume received message (optional) */
- if (likely(!(flags & MSG_PEEK))) {
- if ((sock->state != SS_READY) &&
- (++tsk->rcv_unacked >= TIPC_CONNACK_INTV)) {
- tipc_sk_send_ack(tsk, tsk->rcv_unacked);
- tsk->rcv_unacked = 0;
- }
- tsk_advance_rx_queue(sk);
+ if (unlikely(flags & MSG_PEEK))
+ goto exit;
+
+ if (likely(sock->state != SS_READY)) {
+ tsk->rcv_unacked += tsk_inc(tsk, hlen + sz);
+ if (unlikely(tsk->rcv_unacked >= (tsk->rcv_win / 4)))
+ tipc_sk_send_ack(tsk);
}
+ tsk_advance_rx_queue(sk);
exit:
release_sock(sk);
return res;
@@ -1386,7 +1429,7 @@ static int tipc_recv_stream(struct socket *sock, struct msghdr *m,
int sz_to_copy, target, needed;
int sz_copied = 0;
u32 err;
- int res = 0;
+ int res = 0, hlen;
/* Catch invalid receive attempts */
if (unlikely(!buf_len))
@@ -1412,6 +1455,7 @@ restart:
buf = skb_peek(&sk->sk_receive_queue);
msg = buf_msg(buf);
sz = msg_data_sz(msg);
+ hlen = msg_hdr_sz(msg);
err = msg_errcode(msg);
/* Discard an empty non-errored message & try again */
@@ -1436,8 +1480,7 @@ restart:
needed = (buf_len - sz_copied);
sz_to_copy = (sz <= needed) ? sz : needed;
- res = skb_copy_datagram_msg(buf, msg_hdr_sz(msg) + offset,
- m, sz_to_copy);
+ res = skb_copy_datagram_msg(buf, hlen + offset, m, sz_to_copy);
if (res)
goto exit;
@@ -1459,20 +1502,18 @@ restart:
res = -ECONNRESET;
}
- /* Consume received message (optional) */
- if (likely(!(flags & MSG_PEEK))) {
- if (unlikely(++tsk->rcv_unacked >= TIPC_CONNACK_INTV)) {
- tipc_sk_send_ack(tsk, tsk->rcv_unacked);
- tsk->rcv_unacked = 0;
- }
- tsk_advance_rx_queue(sk);
- }
+ if (unlikely(flags & MSG_PEEK))
+ goto exit;
+
+ tsk->rcv_unacked += tsk_inc(tsk, hlen + sz);
+ if (unlikely(tsk->rcv_unacked >= (tsk->rcv_win / 4)))
+ tipc_sk_send_ack(tsk);
+ tsk_advance_rx_queue(sk);
/* Loop around if more data is required */
if ((sz_copied < buf_len) && /* didn't get all requested data */
(!skb_queue_empty(&sk->sk_receive_queue) ||
(sz_copied < target)) && /* and more is ready or required */
- (!(flags & MSG_PEEK)) && /* and aren't just peeking at data */
(!err)) /* and haven't reached a FIN */
goto restart;
@@ -1604,30 +1645,33 @@ static bool filter_connect(struct tipc_sock *tsk, struct sk_buff *skb)
/**
* rcvbuf_limit - get proper overload limit of socket receive queue
* @sk: socket
- * @buf: message
+ * @skb: message
*
- * For all connection oriented messages, irrespective of importance,
- * the default overload value (i.e. 67MB) is set as limit.
+ * For connection oriented messages, irrespective of importance,
+ * default queue limit is 2 MB.
*
- * For all connectionless messages, by default new queue limits are
- * as belows:
+ * For connectionless messages, queue limits are based on message
+ * importance as follows:
*
- * TIPC_LOW_IMPORTANCE (4 MB)
- * TIPC_MEDIUM_IMPORTANCE (8 MB)
- * TIPC_HIGH_IMPORTANCE (16 MB)
- * TIPC_CRITICAL_IMPORTANCE (32 MB)
+ * TIPC_LOW_IMPORTANCE (2 MB)
+ * TIPC_MEDIUM_IMPORTANCE (4 MB)
+ * TIPC_HIGH_IMPORTANCE (8 MB)
+ * TIPC_CRITICAL_IMPORTANCE (16 MB)
*
* Returns overload limit according to corresponding message importance
*/
-static unsigned int rcvbuf_limit(struct sock *sk, struct sk_buff *buf)
+static unsigned int rcvbuf_limit(struct sock *sk, struct sk_buff *skb)
{
- struct tipc_msg *msg = buf_msg(buf);
+ struct tipc_sock *tsk = tipc_sk(sk);
+ struct tipc_msg *hdr = buf_msg(skb);
+
+ if (unlikely(!msg_connected(hdr)))
+ return sk->sk_rcvbuf << msg_importance(hdr);
- if (msg_connected(msg))
- return sysctl_tipc_rmem[2];
+ if (likely(tsk->peer_caps & TIPC_BLOCK_FLOWCTL))
+ return sk->sk_rcvbuf;
- return sk->sk_rcvbuf >> TIPC_CRITICAL_IMPORTANCE <<
- msg_importance(msg);
+ return FLOWCTL_MSG_LIM;
}
/**
diff --git a/net/tipc/socket.h b/net/tipc/socket.h
index 4241f22069dc..06fb5944cf76 100644
--- a/net/tipc/socket.h
+++ b/net/tipc/socket.h
@@ -1,6 +1,6 @@
/* net/tipc/socket.h: Include file for TIPC socket code
*
- * Copyright (c) 2014-2015, Ericsson AB
+ * Copyright (c) 2014-2016, Ericsson AB
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
@@ -38,10 +38,17 @@
#include <net/sock.h>
#include <net/genetlink.h>
-#define TIPC_CONNACK_INTV 256
-#define TIPC_FLOWCTRL_WIN (TIPC_CONNACK_INTV * 2)
-#define TIPC_CONN_OVERLOAD_LIMIT ((TIPC_FLOWCTRL_WIN * 2 + 1) * \
- SKB_TRUESIZE(TIPC_MAX_USER_MSG_SIZE))
+/* Compatibility values for deprecated message based flow control */
+#define FLOWCTL_MSG_WIN 512
+#define FLOWCTL_MSG_LIM ((FLOWCTL_MSG_WIN * 2 + 1) * SKB_TRUESIZE(MAX_MSG_SIZE))
+
+#define FLOWCTL_BLK_SZ 1024
+
+/* Socket receive buffer sizes */
+#define RCVBUF_MIN (FLOWCTL_BLK_SZ * 512)
+#define RCVBUF_DEF (FLOWCTL_BLK_SZ * 1024 * 2)
+#define RCVBUF_MAX (FLOWCTL_BLK_SZ * 1024 * 16)
+
int tipc_socket_init(void);
void tipc_socket_stop(void);
void tipc_sk_rcv(struct net *net, struct sk_buff_head *inputq);
generated by cgit v1.2.3-55-g7522 (git 2.39.0) at 2024-06-20 14:41:10 +0200