#endif
/*
- * This array holds the first and last local port number.
- * For high-usage systems, use sysctl to change this to
- * 32768-61000
+ * This struct holds the first and last local port number.
*/
-int sysctl_local_port_range[2] = { 1024, 4999 };
+struct local_ports sysctl_local_ports __read_mostly = {
+ .lock = SEQLOCK_UNLOCKED,
+ .range = { 32768, 61000 },
+};
+
+void inet_get_local_port_range(int *low, int *high)
+{
+ unsigned seq;
+ do {
+ seq = read_seqbegin(&sysctl_local_ports.lock);
+
+ *low = sysctl_local_ports.range[0];
+ *high = sysctl_local_ports.range[1];
+ } while (read_seqretry(&sysctl_local_ports.lock, seq));
+}
+EXPORT_SYMBOL(inet_get_local_port_range);
int inet_csk_bind_conflict(const struct sock *sk,
const struct inet_bind_bucket *tb)
{
- const u32 sk_rcv_saddr = inet_rcv_saddr(sk);
+ const __be32 sk_rcv_saddr = inet_rcv_saddr(sk);
struct sock *sk2;
struct hlist_node *node;
int reuse = sk->sk_reuse;
+ /*
+ * Unlike other sk lookup places we do not check
+ * for sk_net here, since _all_ the socks listed
+ * in tb->owners list belong to the same net - the
+ * one this bucket belongs to.
+ */
+
sk_for_each_bound(sk2, node, &tb->owners) {
if (sk != sk2 &&
!inet_v6_ipv6only(sk2) &&
sk->sk_bound_dev_if == sk2->sk_bound_dev_if)) {
if (!reuse || !sk2->sk_reuse ||
sk2->sk_state == TCP_LISTEN) {
- const u32 sk2_rcv_saddr = inet_rcv_saddr(sk2);
+ const __be32 sk2_rcv_saddr = inet_rcv_saddr(sk2);
if (!sk2_rcv_saddr || !sk_rcv_saddr ||
sk2_rcv_saddr == sk_rcv_saddr)
break;
/* Obtain a reference to a local port for the given sock,
* if snum is zero it means select any available local port.
*/
-int inet_csk_get_port(struct inet_hashinfo *hashinfo,
- struct sock *sk, unsigned short snum,
- int (*bind_conflict)(const struct sock *sk,
- const struct inet_bind_bucket *tb))
+int inet_csk_get_port(struct sock *sk, unsigned short snum)
{
+ struct inet_hashinfo *hashinfo = sk->sk_prot->h.hashinfo;
struct inet_bind_hashbucket *head;
struct hlist_node *node;
struct inet_bind_bucket *tb;
- int ret;
+ int ret, attempts = 5;
+ struct net *net = sock_net(sk);
+ int smallest_size = -1, smallest_rover;
local_bh_disable();
if (!snum) {
- int low = sysctl_local_port_range[0];
- int high = sysctl_local_port_range[1];
- int remaining = (high - low) + 1;
- int rover = net_random() % (high - low) + low;
+ int remaining, rover, low, high;
+
+again:
+ inet_get_local_port_range(&low, &high);
+ remaining = (high - low) + 1;
+ smallest_rover = rover = net_random() % remaining + low;
+ smallest_size = -1;
do {
- head = &hashinfo->bhash[inet_bhashfn(rover, hashinfo->bhash_size)];
+ head = &hashinfo->bhash[inet_bhashfn(net, rover,
+ hashinfo->bhash_size)];
spin_lock(&head->lock);
inet_bind_bucket_for_each(tb, node, &head->chain)
- if (tb->port == rover)
+ if (net_eq(ib_net(tb), net) && tb->port == rover) {
+ if (tb->fastreuse > 0 &&
+ sk->sk_reuse &&
+ sk->sk_state != TCP_LISTEN &&
+ (tb->num_owners < smallest_size || smallest_size == -1)) {
+ smallest_size = tb->num_owners;
+ smallest_rover = rover;
+ if (atomic_read(&hashinfo->bsockets) > (high - low) + 1) {
+ spin_unlock(&head->lock);
+ snum = smallest_rover;
+ goto have_snum;
+ }
+ }
goto next;
+ }
break;
next:
spin_unlock(&head->lock);
* the top level, not from the 'break;' statement.
*/
ret = 1;
- if (remaining <= 0)
+ if (remaining <= 0) {
+ if (smallest_size != -1) {
+ snum = smallest_rover;
+ goto have_snum;
+ }
goto fail;
-
+ }
/* OK, here is the one we will use. HEAD is
* non-NULL and we hold it's mutex.
*/
snum = rover;
} else {
- head = &hashinfo->bhash[inet_bhashfn(snum, hashinfo->bhash_size)];
+have_snum:
+ head = &hashinfo->bhash[inet_bhashfn(net, snum,
+ hashinfo->bhash_size)];
spin_lock(&head->lock);
inet_bind_bucket_for_each(tb, node, &head->chain)
- if (tb->port == snum)
+ if (net_eq(ib_net(tb), net) && tb->port == snum)
goto tb_found;
}
tb = NULL;
goto tb_not_found;
tb_found:
if (!hlist_empty(&tb->owners)) {
- if (sk->sk_reuse > 1)
- goto success;
if (tb->fastreuse > 0 &&
- sk->sk_reuse && sk->sk_state != TCP_LISTEN) {
+ sk->sk_reuse && sk->sk_state != TCP_LISTEN &&
+ smallest_size == -1) {
goto success;
} else {
ret = 1;
- if (bind_conflict(sk, tb))
+ if (inet_csk(sk)->icsk_af_ops->bind_conflict(sk, tb)) {
+ if (sk->sk_reuse && sk->sk_state != TCP_LISTEN &&
+ smallest_size != -1 && --attempts >= 0) {
+ spin_unlock(&head->lock);
+ goto again;
+ }
goto fail_unlock;
+ }
}
}
tb_not_found:
ret = 1;
- if (!tb && (tb = inet_bind_bucket_create(hashinfo->bind_bucket_cachep, head, snum)) == NULL)
+ if (!tb && (tb = inet_bind_bucket_create(hashinfo->bind_bucket_cachep,
+ net, head, snum)) == NULL)
goto fail_unlock;
if (hlist_empty(&tb->owners)) {
if (sk->sk_reuse && sk->sk_state != TCP_LISTEN)
success:
if (!inet_csk(sk)->icsk_bind_hash)
inet_bind_hash(sk, tb, snum);
- BUG_TRAP(inet_csk(sk)->icsk_bind_hash == tb);
- ret = 0;
+ WARN_ON(inet_csk(sk)->icsk_bind_hash != tb);
+ ret = 0;
fail_unlock:
spin_unlock(&head->lock);
}
newsk = reqsk_queue_get_child(&icsk->icsk_accept_queue, sk);
- BUG_TRAP(newsk->sk_state != TCP_SYN_RECV);
+ WARN_ON(newsk->sk_state == TCP_SYN_RECV);
out:
release_sock(sk);
return newsk;
/*
* Using different timers for retransmit, delayed acks and probes
- * We may wish use just one timer maintaining a list of expire jiffies
+ * We may wish use just one timer maintaining a list of expire jiffies
* to optimize.
*/
void inet_csk_init_xmit_timers(struct sock *sk,
{
struct inet_connection_sock *icsk = inet_csk(sk);
- init_timer(&icsk->icsk_retransmit_timer);
- init_timer(&icsk->icsk_delack_timer);
- init_timer(&sk->sk_timer);
-
- icsk->icsk_retransmit_timer.function = retransmit_handler;
- icsk->icsk_delack_timer.function = delack_handler;
- sk->sk_timer.function = keepalive_handler;
-
- icsk->icsk_retransmit_timer.data =
- icsk->icsk_delack_timer.data =
- sk->sk_timer.data = (unsigned long)sk;
-
+ setup_timer(&icsk->icsk_retransmit_timer, retransmit_handler,
+ (unsigned long)sk);
+ setup_timer(&icsk->icsk_delack_timer, delack_handler,
+ (unsigned long)sk);
+ setup_timer(&sk->sk_timer, keepalive_handler, (unsigned long)sk);
icsk->icsk_pending = icsk->icsk_ack.pending = 0;
}
EXPORT_SYMBOL(inet_csk_reset_keepalive_timer);
-struct dst_entry* inet_csk_route_req(struct sock *sk,
+struct dst_entry *inet_csk_route_req(struct sock *sk,
const struct request_sock *req)
{
struct rtable *rt;
const struct inet_request_sock *ireq = inet_rsk(req);
struct ip_options *opt = inet_rsk(req)->opt;
struct flowi fl = { .oif = sk->sk_bound_dev_if,
+ .mark = sk->sk_mark,
.nl_u = { .ip4_u =
{ .daddr = ((opt && opt->srr) ?
opt->faddr :
.saddr = ireq->loc_addr,
.tos = RT_CONN_FLAGS(sk) } },
.proto = sk->sk_protocol,
+ .flags = inet_sk_flowi_flags(sk),
.uli_u = { .ports =
- { .sport = inet_sk(sk)->sport,
+ { .sport = inet_sk(sk)->inet_sport,
.dport = ireq->rmt_port } } };
+ struct net *net = sock_net(sk);
security_req_classify_flow(req, &fl);
- if (ip_route_output_flow(&rt, &fl, sk, 0)) {
- IP_INC_STATS_BH(IPSTATS_MIB_OUTNOROUTES);
- return NULL;
- }
- if (opt && opt->is_strictroute && rt->rt_dst != rt->rt_gateway) {
- ip_rt_put(rt);
- IP_INC_STATS_BH(IPSTATS_MIB_OUTNOROUTES);
- return NULL;
- }
+ if (ip_route_output_flow(net, &rt, &fl, sk, 0))
+ goto no_route;
+ if (opt && opt->is_strictroute && rt->rt_dst != rt->rt_gateway)
+ goto route_err;
return &rt->u.dst;
+
+route_err:
+ ip_rt_put(rt);
+no_route:
+ IP_INC_STATS_BH(net, IPSTATS_MIB_OUTNOROUTES);
+ return NULL;
}
EXPORT_SYMBOL_GPL(inet_csk_route_req);
static inline u32 inet_synq_hash(const __be32 raddr, const __be16 rport,
- const u32 rnd, const u16 synq_hsize)
+ const u32 rnd, const u32 synq_hsize)
{
return jhash_2words((__force u32)raddr, (__force u32)rport, rnd) & (synq_hsize - 1);
}
ireq->rmt_addr == raddr &&
ireq->loc_addr == laddr &&
AF_INET_FAMILY(req->rsk_ops->family)) {
- BUG_TRAP(!req->sk);
+ WARN_ON(req->sk);
*prevp = prev;
break;
}
EXPORT_SYMBOL_GPL(inet_csk_reqsk_queue_hash_add);
+/* Decide when to expire the request and when to resend SYN-ACK */
+static inline void syn_ack_recalc(struct request_sock *req, const int thresh,
+ const int max_retries,
+ const u8 rskq_defer_accept,
+ int *expire, int *resend)
+{
+ if (!rskq_defer_accept) {
+ *expire = req->retrans >= thresh;
+ *resend = 1;
+ return;
+ }
+ *expire = req->retrans >= thresh &&
+ (!inet_rsk(req)->acked || req->retrans >= max_retries);
+ /*
+ * Do not resend while waiting for data after ACK,
+ * start to resend on end of deferring period to give
+ * last chance for data or ACK to create established socket.
+ */
+ *resend = !inet_rsk(req)->acked ||
+ req->retrans >= rskq_defer_accept - 1;
+}
+
void inet_csk_reqsk_queue_prune(struct sock *parent,
const unsigned long interval,
const unsigned long timeout,
reqp=&lopt->syn_table[i];
while ((req = *reqp) != NULL) {
if (time_after_eq(now, req->expires)) {
- if ((req->retrans < thresh ||
- (inet_rsk(req)->acked && req->retrans < max_retries))
- && !req->rsk_ops->rtx_syn_ack(parent, req, NULL)) {
+ int expire = 0, resend = 0;
+
+ syn_ack_recalc(req, thresh, max_retries,
+ queue->rskq_defer_accept,
+ &expire, &resend);
+ if (!expire &&
+ (!resend ||
+ !req->rsk_ops->rtx_syn_ack(parent, req, NULL) ||
+ inet_rsk(req)->acked)) {
unsigned long timeo;
if (req->retrans++ == 0)
newsk->sk_state = TCP_SYN_RECV;
newicsk->icsk_bind_hash = NULL;
- inet_sk(newsk)->dport = inet_rsk(req)->rmt_port;
+ inet_sk(newsk)->inet_dport = inet_rsk(req)->rmt_port;
+ inet_sk(newsk)->inet_num = ntohs(inet_rsk(req)->loc_port);
+ inet_sk(newsk)->inet_sport = inet_rsk(req)->loc_port;
newsk->sk_write_space = sk_stream_write_space;
newicsk->icsk_retransmits = 0;
*/
void inet_csk_destroy_sock(struct sock *sk)
{
- BUG_TRAP(sk->sk_state == TCP_CLOSE);
- BUG_TRAP(sock_flag(sk, SOCK_DEAD));
+ WARN_ON(sk->sk_state != TCP_CLOSE);
+ WARN_ON(!sock_flag(sk, SOCK_DEAD));
/* It cannot be in hash table! */
- BUG_TRAP(sk_unhashed(sk));
+ WARN_ON(!sk_unhashed(sk));
- /* If it has not 0 inet_sk(sk)->num, it must be bound */
- BUG_TRAP(!inet_sk(sk)->num || inet_csk(sk)->icsk_bind_hash);
+ /* If it has not 0 inet_sk(sk)->inet_num, it must be bound */
+ WARN_ON(inet_sk(sk)->inet_num && !inet_csk(sk)->icsk_bind_hash);
sk->sk_prot->destroy(sk);
sk_refcnt_debug_release(sk);
- atomic_dec(sk->sk_prot->orphan_count);
+ percpu_counter_dec(sk->sk_prot->orphan_count);
sock_put(sk);
}
* after validation is complete.
*/
sk->sk_state = TCP_LISTEN;
- if (!sk->sk_prot->get_port(sk, inet->num)) {
- inet->sport = htons(inet->num);
+ if (!sk->sk_prot->get_port(sk, inet->inet_num)) {
+ inet->inet_sport = htons(inet->inet_num);
sk_dst_reset(sk);
sk->sk_prot->hash(sk);
local_bh_disable();
bh_lock_sock(child);
- BUG_TRAP(!sock_owned_by_user(child));
+ WARN_ON(sock_owned_by_user(child));
sock_hold(child);
sk->sk_prot->disconnect(child, O_NONBLOCK);
sock_orphan(child);
- atomic_inc(sk->sk_prot->orphan_count);
+ percpu_counter_inc(sk->sk_prot->orphan_count);
inet_csk_destroy_sock(child);
sk_acceptq_removed(sk);
__reqsk_free(req);
}
- BUG_TRAP(!sk->sk_ack_backlog);
+ WARN_ON(sk->sk_ack_backlog);
}
EXPORT_SYMBOL_GPL(inet_csk_listen_stop);
const struct inet_sock *inet = inet_sk(sk);
sin->sin_family = AF_INET;
- sin->sin_addr.s_addr = inet->daddr;
- sin->sin_port = inet->dport;
+ sin->sin_addr.s_addr = inet->inet_daddr;
+ sin->sin_port = inet->inet_dport;
}
EXPORT_SYMBOL_GPL(inet_csk_addr2sockaddr);
-int inet_csk_ctl_sock_create(struct socket **sock, unsigned short family,
- unsigned short type, unsigned char protocol)
-{
- int rc = sock_create_kern(family, type, protocol, sock);
-
- if (rc == 0) {
- (*sock)->sk->sk_allocation = GFP_ATOMIC;
- inet_sk((*sock)->sk)->uc_ttl = -1;
- /*
- * Unhash it so that IP input processing does not even see it,
- * we do not wish this socket to see incoming packets.
- */
- (*sock)->sk->sk_prot->unhash((*sock)->sk);
- }
- return rc;
-}
-
-EXPORT_SYMBOL_GPL(inet_csk_ctl_sock_create);
-
#ifdef CONFIG_COMPAT
int inet_csk_compat_getsockopt(struct sock *sk, int level, int optname,
char __user *optval, int __user *optlen)
EXPORT_SYMBOL_GPL(inet_csk_compat_getsockopt);
int inet_csk_compat_setsockopt(struct sock *sk, int level, int optname,
- char __user *optval, int optlen)
+ char __user *optval, unsigned int optlen)
{
const struct inet_connection_sock *icsk = inet_csk(sk);
git://ftp.safe.ca / safe / jmp / linux-2.6 / blobdiff