tcp: remove max_qlen_log
This control variable was set at first listen(fd, backlog)
call, but not updated if application tried to increase or decrease
backlog. It made sense at the time listener had a non resizeable
hash table.
Also rounding to powers of two was not very friendly.
Signed-off-by: Eric Dumazet <[email protected]>
Signed-off-by: David S. Miller <[email protected]>
diff --git a/include/net/inet_connection_sock.h b/include/net/inet_connection_sock.h
index 730aa03..3208a65 100644
--- a/include/net/inet_connection_sock.h
+++ b/include/net/inet_connection_sock.h
@@ -295,7 +295,7 @@
static inline int inet_csk_reqsk_queue_is_full(const struct sock *sk)
{
- return reqsk_queue_is_full(&inet_csk(sk)->icsk_accept_queue);
+ return inet_csk_reqsk_queue_len(sk) >= sk->sk_max_ack_backlog;
}
void inet_csk_reqsk_queue_drop(struct sock *sk, struct request_sock *req);
diff --git a/include/net/request_sock.h b/include/net/request_sock.h
index a66ab13..bae6936 100644
--- a/include/net/request_sock.h
+++ b/include/net/request_sock.h
@@ -157,7 +157,7 @@
struct request_sock_queue {
spinlock_t rskq_lock;
u8 rskq_defer_accept;
- u8 max_qlen_log;
+
u32 synflood_warned;
atomic_t qlen;
atomic_t young;
@@ -169,8 +169,7 @@
*/
};
-void reqsk_queue_alloc(struct request_sock_queue *queue,
- unsigned int nr_table_entries);
+void reqsk_queue_alloc(struct request_sock_queue *queue);
void reqsk_fastopen_remove(struct sock *sk, struct request_sock *req,
bool reset);
@@ -240,9 +239,4 @@
return atomic_read(&queue->young);
}
-static inline int reqsk_queue_is_full(const struct request_sock_queue *queue)
-{
- return reqsk_queue_len(queue) >> queue->max_qlen_log;
-}
-
#endif /* _REQUEST_SOCK_H */
diff --git a/net/core/request_sock.c b/net/core/request_sock.c
index ecf7418..15c8538 100644
--- a/net/core/request_sock.c
+++ b/net/core/request_sock.c
@@ -37,13 +37,8 @@
int sysctl_max_syn_backlog = 256;
EXPORT_SYMBOL(sysctl_max_syn_backlog);
-void reqsk_queue_alloc(struct request_sock_queue *queue,
- unsigned int nr_table_entries)
+void reqsk_queue_alloc(struct request_sock_queue *queue)
{
- nr_table_entries = min_t(u32, nr_table_entries, sysctl_max_syn_backlog);
- nr_table_entries = max_t(u32, nr_table_entries, 8);
- nr_table_entries = roundup_pow_of_two(nr_table_entries + 1);
-
spin_lock_init(&queue->rskq_lock);
spin_lock_init(&queue->fastopenq.lock);
@@ -53,7 +48,6 @@
queue->fastopenq.max_qlen = 0;
queue->rskq_accept_head = NULL;
- queue->max_qlen_log = ilog2(nr_table_entries);
}
/*
diff --git a/net/ipv4/inet_connection_sock.c b/net/ipv4/inet_connection_sock.c
index 7754832..5f6e31a 100644
--- a/net/ipv4/inet_connection_sock.c
+++ b/net/ipv4/inet_connection_sock.c
@@ -579,7 +579,7 @@
* ones are about to clog our table.
*/
qlen = reqsk_queue_len(queue);
- if (qlen >> (queue->max_qlen_log - 1)) {
+ if ((qlen << 1) > sk_listener->sk_max_ack_backlog) {
int young = reqsk_queue_len_young(queue) << 1;
while (thresh > 2) {
@@ -732,7 +732,7 @@
struct inet_connection_sock *icsk = inet_csk(sk);
struct inet_sock *inet = inet_sk(sk);
- reqsk_queue_alloc(&icsk->icsk_accept_queue, nr_table_entries);
+ reqsk_queue_alloc(&icsk->icsk_accept_queue);
sk->sk_max_ack_backlog = 0;
sk->sk_ack_backlog = 0;
