aboutsummaryrefslogtreecommitdiff
path: root/net/ipv4/tcp_minisocks.c
diff options
context:
space:
mode:
Diffstat (limited to 'net/ipv4/tcp_minisocks.c')
-rw-r--r--net/ipv4/tcp_minisocks.c61
1 files changed, 25 insertions, 36 deletions
diff --git a/net/ipv4/tcp_minisocks.c b/net/ipv4/tcp_minisocks.c
index dd11ac7798c6..63d6311b5365 100644
--- a/net/ipv4/tcp_minisocks.c
+++ b/net/ipv4/tcp_minisocks.c
@@ -34,18 +34,7 @@ int sysctl_tcp_abort_on_overflow __read_mostly;
struct inet_timewait_death_row tcp_death_row = {
.sysctl_max_tw_buckets = NR_FILE * 2,
- .period = TCP_TIMEWAIT_LEN / INET_TWDR_TWKILL_SLOTS,
- .death_lock = __SPIN_LOCK_UNLOCKED(tcp_death_row.death_lock),
.hashinfo = &tcp_hashinfo,
- .tw_timer = TIMER_INITIALIZER(inet_twdr_hangman, 0,
- (unsigned long)&tcp_death_row),
- .twkill_work = __WORK_INITIALIZER(tcp_death_row.twkill_work,
- inet_twdr_twkill_work),
-/* Short-time timewait calendar */
-
- .twcal_hand = -1,
- .twcal_timer = TIMER_INITIALIZER(inet_twdr_twcal_tick, 0,
- (unsigned long)&tcp_death_row),
};
EXPORT_SYMBOL_GPL(tcp_death_row);
@@ -158,7 +147,7 @@ tcp_timewait_state_process(struct inet_timewait_sock *tw, struct sk_buff *skb,
if (!th->fin ||
TCP_SKB_CB(skb)->end_seq != tcptw->tw_rcv_nxt + 1) {
kill_with_rst:
- inet_twsk_deschedule(tw, &tcp_death_row);
+ inet_twsk_deschedule(tw);
inet_twsk_put(tw);
return TCP_TW_RST;
}
@@ -174,11 +163,9 @@ kill_with_rst:
if (tcp_death_row.sysctl_tw_recycle &&
tcptw->tw_ts_recent_stamp &&
tcp_tw_remember_stamp(tw))
- inet_twsk_schedule(tw, &tcp_death_row, tw->tw_timeout,
- TCP_TIMEWAIT_LEN);
+ inet_twsk_schedule(tw, tw->tw_timeout);
else
- inet_twsk_schedule(tw, &tcp_death_row, TCP_TIMEWAIT_LEN,
- TCP_TIMEWAIT_LEN);
+ inet_twsk_schedule(tw, TCP_TIMEWAIT_LEN);
return TCP_TW_ACK;
}
@@ -211,13 +198,12 @@ kill_with_rst:
*/
if (sysctl_tcp_rfc1337 == 0) {
kill:
- inet_twsk_deschedule(tw, &tcp_death_row);
+ inet_twsk_deschedule(tw);
inet_twsk_put(tw);
return TCP_TW_SUCCESS;
}
}
- inet_twsk_schedule(tw, &tcp_death_row, TCP_TIMEWAIT_LEN,
- TCP_TIMEWAIT_LEN);
+ inet_twsk_schedule(tw, TCP_TIMEWAIT_LEN);
if (tmp_opt.saw_tstamp) {
tcptw->tw_ts_recent = tmp_opt.rcv_tsval;
@@ -267,8 +253,7 @@ kill:
* Do not reschedule in the last case.
*/
if (paws_reject || th->ack)
- inet_twsk_schedule(tw, &tcp_death_row, TCP_TIMEWAIT_LEN,
- TCP_TIMEWAIT_LEN);
+ inet_twsk_schedule(tw, TCP_TIMEWAIT_LEN);
return tcp_timewait_check_oow_rate_limit(
tw, skb, LINUX_MIB_TCPACKSKIPPEDTIMEWAIT);
@@ -283,18 +268,17 @@ EXPORT_SYMBOL(tcp_timewait_state_process);
*/
void tcp_time_wait(struct sock *sk, int state, int timeo)
{
- struct inet_timewait_sock *tw = NULL;
const struct inet_connection_sock *icsk = inet_csk(sk);
const struct tcp_sock *tp = tcp_sk(sk);
+ struct inet_timewait_sock *tw;
bool recycle_ok = false;
if (tcp_death_row.sysctl_tw_recycle && tp->rx_opt.ts_recent_stamp)
recycle_ok = tcp_remember_stamp(sk);
- if (tcp_death_row.tw_count < tcp_death_row.sysctl_max_tw_buckets)
- tw = inet_twsk_alloc(sk, state);
+ tw = inet_twsk_alloc(sk, &tcp_death_row, state);
- if (tw != NULL) {
+ if (tw) {
struct tcp_timewait_sock *tcptw = tcp_twsk((struct sock *)tw);
const int rto = (icsk->icsk_rto << 2) - (icsk->icsk_rto >> 1);
struct inet_sock *inet = inet_sk(sk);
@@ -332,7 +316,7 @@ void tcp_time_wait(struct sock *sk, int state, int timeo)
struct tcp_md5sig_key *key;
tcptw->tw_md5_key = NULL;
key = tp->af_specific->md5_lookup(sk, sk);
- if (key != NULL) {
+ if (key) {
tcptw->tw_md5_key = kmemdup(key, sizeof(*key), GFP_ATOMIC);
if (tcptw->tw_md5_key && !tcp_alloc_md5sig_pool())
BUG();
@@ -355,8 +339,7 @@ void tcp_time_wait(struct sock *sk, int state, int timeo)
timeo = TCP_TIMEWAIT_LEN;
}
- inet_twsk_schedule(tw, &tcp_death_row, timeo,
- TCP_TIMEWAIT_LEN);
+ inet_twsk_schedule(tw, timeo);
inet_twsk_put(tw);
} else {
/* Sorry, if we're out of memory, just CLOSE this
@@ -454,7 +437,7 @@ struct sock *tcp_create_openreq_child(struct sock *sk, struct request_sock *req,
{
struct sock *newsk = inet_csk_clone_lock(sk, req, GFP_ATOMIC);
- if (newsk != NULL) {
+ if (newsk) {
const struct inet_request_sock *ireq = inet_rsk(req);
struct tcp_request_sock *treq = tcp_rsk(req);
struct inet_connection_sock *newicsk = inet_csk(newsk);
@@ -572,7 +555,6 @@ EXPORT_SYMBOL(tcp_create_openreq_child);
struct sock *tcp_check_req(struct sock *sk, struct sk_buff *skb,
struct request_sock *req,
- struct request_sock **prev,
bool fastopen)
{
struct tcp_options_received tmp_opt;
@@ -629,9 +611,16 @@ struct sock *tcp_check_req(struct sock *sk, struct sk_buff *skb,
LINUX_MIB_TCPACKSKIPPEDSYNRECV,
&tcp_rsk(req)->last_oow_ack_time) &&
- !inet_rtx_syn_ack(sk, req))
- req->expires = min(TCP_TIMEOUT_INIT << req->num_timeout,
- TCP_RTO_MAX) + jiffies;
+ !inet_rtx_syn_ack(sk, req)) {
+ unsigned long expires = jiffies;
+
+ expires += min(TCP_TIMEOUT_INIT << req->num_timeout,
+ TCP_RTO_MAX);
+ if (!fastopen)
+ mod_timer_pending(&req->rsk_timer, expires);
+ else
+ req->rsk_timer.expires = expires;
+ }
return NULL;
}
@@ -763,10 +752,10 @@ struct sock *tcp_check_req(struct sock *sk, struct sk_buff *skb,
* socket is created, wait for troubles.
*/
child = inet_csk(sk)->icsk_af_ops->syn_recv_sock(sk, skb, req, NULL);
- if (child == NULL)
+ if (!child)
goto listen_overflow;
- inet_csk_reqsk_queue_unlink(sk, req, prev);
+ inet_csk_reqsk_queue_unlink(sk, req);
inet_csk_reqsk_queue_removed(sk, req);
inet_csk_reqsk_queue_add(sk, req, child);
@@ -791,7 +780,7 @@ embryonic_reset:
tcp_reset(sk);
}
if (!fastopen) {
- inet_csk_reqsk_queue_drop(sk, req, prev);
+ inet_csk_reqsk_queue_drop(sk, req);
NET_INC_STATS_BH(sock_net(sk), LINUX_MIB_EMBRYONICRSTS);
}
return NULL;
generated by cgit v1.2.3 (git 2.25.1) at 2024-04-25 01:48:06 +0000