int sysctl_tcp_fin_timeout __read_mostly = TCP_FIN_TIMEOUT;
-DEFINE_SNMP_STAT(struct tcp_mib, tcp_statistics) __read_mostly;
-
-atomic_t tcp_orphan_count = ATOMIC_INIT(0);
-
+struct percpu_counter tcp_orphan_count;
EXPORT_SYMBOL_GPL(tcp_orphan_count);
int sysctl_tcp_mem[3] __read_mostly;
EXPORT_SYMBOL(sysctl_tcp_wmem);
atomic_t tcp_memory_allocated; /* Current allocated memory. */
-atomic_t tcp_sockets_allocated; /* Current number of TCP sockets. */
-
EXPORT_SYMBOL(tcp_memory_allocated);
+
+/*
+ * Current number of TCP sockets.
+ */
+struct percpu_counter tcp_sockets_allocated;
EXPORT_SYMBOL(tcp_sockets_allocated);
/*
EXPORT_SYMBOL(tcp_memory_pressure);
-void tcp_enter_memory_pressure(void)
+void tcp_enter_memory_pressure(struct sock *sk)
{
if (!tcp_memory_pressure) {
- NET_INC_STATS(LINUX_MIB_TCPMEMORYPRESSURES);
+ NET_INC_STATS(sock_net(sk), LINUX_MIB_TCPMEMORYPRESSURES);
tcp_memory_pressure = 1;
}
}
/* Connected? */
if ((1 << sk->sk_state) & ~(TCPF_SYN_SENT | TCPF_SYN_RECV)) {
+ int target = sock_rcvlowat(sk, 0, INT_MAX);
+
+ if (tp->urg_seq == tp->copied_seq &&
+ !sock_flag(sk, SOCK_URGINLINE) &&
+ tp->urg_data)
+ target--;
+
/* Potential race condition. If read of tp below will
* escape above sk->sk_state, we can be illegally awaken
* in SYN_* states. */
- if ((tp->rcv_nxt != tp->copied_seq) &&
- (tp->urg_seq != tp->copied_seq ||
- tp->rcv_nxt != tp->copied_seq + 1 ||
- sock_flag(sk, SOCK_URGINLINE) || !tp->urg_data))
+ if (tp->rcv_nxt - tp->copied_seq >= target)
mask |= POLLIN | POLLRDNORM;
if (!(sk->sk_shutdown & SEND_SHUTDOWN)) {
static inline void tcp_mark_urg(struct tcp_sock *tp, int flags,
struct sk_buff *skb)
{
- if (flags & MSG_OOB) {
- tp->urg_mode = 1;
+ if (flags & MSG_OOB)
tp->snd_up = tp->write_seq;
- }
}
static inline void tcp_push(struct sock *sk, int flags, int mss_now,
unsigned int offset, size_t len)
{
struct tcp_splice_state *tss = rd_desc->arg.data;
+ int ret;
- return skb_splice_bits(skb, offset, tss->pipe, tss->len, tss->flags);
+ ret = skb_splice_bits(skb, offset, tss->pipe, min(rd_desc->count, len),
+ tss->flags);
+ if (ret > 0)
+ rd_desc->count -= ret;
+ return ret;
}
static int __tcp_splice_read(struct sock *sk, struct tcp_splice_state *tss)
/* Store TCP splice context information in read_descriptor_t. */
read_descriptor_t rd_desc = {
.arg.data = tss,
+ .count = tss->len,
};
return tcp_read_sock(sk, &rd_desc, tcp_splice_data_recv);
else if (!ret) {
if (spliced)
break;
- if (flags & SPLICE_F_NONBLOCK) {
- ret = -EAGAIN;
- break;
- }
if (sock_flag(sk, SOCK_DONE))
break;
if (sk->sk_err) {
tss.len -= ret;
spliced += ret;
+ if (!timeo)
+ break;
release_sock(sk);
lock_sock(sk);
if (sk->sk_err || sk->sk_state == TCP_CLOSE ||
- (sk->sk_shutdown & RCV_SHUTDOWN) || !timeo ||
+ (sk->sk_shutdown & RCV_SHUTDOWN) ||
signal_pending(current))
break;
}
}
__kfree_skb(skb);
} else {
- sk->sk_prot->enter_memory_pressure();
+ sk->sk_prot->enter_memory_pressure(sk);
sk_stream_moderate_sndbuf(sk);
}
return NULL;
}
+static unsigned int tcp_xmit_size_goal(struct sock *sk, u32 mss_now,
+ int large_allowed)
+{
+ struct tcp_sock *tp = tcp_sk(sk);
+ u32 xmit_size_goal, old_size_goal;
+
+ xmit_size_goal = mss_now;
+
+ if (large_allowed && sk_can_gso(sk)) {
+ xmit_size_goal = ((sk->sk_gso_max_size - 1) -
+ inet_csk(sk)->icsk_af_ops->net_header_len -
+ inet_csk(sk)->icsk_ext_hdr_len -
+ tp->tcp_header_len);
+
+ xmit_size_goal = tcp_bound_to_half_wnd(tp, xmit_size_goal);
+
+ /* We try hard to avoid divides here */
+ old_size_goal = tp->xmit_size_goal_segs * mss_now;
+
+ if (likely(old_size_goal <= xmit_size_goal &&
+ old_size_goal + mss_now > xmit_size_goal)) {
+ xmit_size_goal = old_size_goal;
+ } else {
+ tp->xmit_size_goal_segs = xmit_size_goal / mss_now;
+ xmit_size_goal = tp->xmit_size_goal_segs * mss_now;
+ }
+ }
+
+ return max(xmit_size_goal, mss_now);
+}
+
+static int tcp_send_mss(struct sock *sk, int *size_goal, int flags)
+{
+ int mss_now;
+
+ mss_now = tcp_current_mss(sk);
+ *size_goal = tcp_xmit_size_goal(sk, mss_now, !(flags & MSG_OOB));
+
+ return mss_now;
+}
+
static ssize_t do_tcp_sendpages(struct sock *sk, struct page **pages, int poffset,
size_t psize, int flags)
{
clear_bit(SOCK_ASYNC_NOSPACE, &sk->sk_socket->flags);
- mss_now = tcp_current_mss(sk, !(flags&MSG_OOB));
- size_goal = tp->xmit_size_goal;
+ mss_now = tcp_send_mss(sk, &size_goal, flags);
copied = 0;
err = -EPIPE;
if (sk->sk_err || (sk->sk_shutdown & SEND_SHUTDOWN))
- goto do_error;
+ goto out_err;
while (psize > 0) {
struct sk_buff *skb = tcp_write_queue_tail(sk);
if ((err = sk_stream_wait_memory(sk, &timeo)) != 0)
goto do_error;
- mss_now = tcp_current_mss(sk, !(flags&MSG_OOB));
- size_goal = tp->xmit_size_goal;
+ mss_now = tcp_send_mss(sk, &size_goal, flags);
}
out:
/* This should be in poll */
clear_bit(SOCK_ASYNC_NOSPACE, &sk->sk_socket->flags);
- mss_now = tcp_current_mss(sk, !(flags&MSG_OOB));
- size_goal = tp->xmit_size_goal;
+ mss_now = tcp_send_mss(sk, &size_goal, flags);
/* Ok commence sending. */
iovlen = msg->msg_iovlen;
err = -EPIPE;
if (sk->sk_err || (sk->sk_shutdown & SEND_SHUTDOWN))
- goto do_error;
+ goto out_err;
while (--iovlen >= 0) {
int seglen = iov->iov_len;
if ((err = sk_stream_wait_memory(sk, &timeo)) != 0)
goto do_error;
- mss_now = tcp_current_mss(sk, !(flags&MSG_OOB));
- size_goal = tp->xmit_size_goal;
+ mss_now = tcp_send_mss(sk, &size_goal, flags);
}
}
* this, no blocking and very strange errors 8)
*/
-static int tcp_recv_urg(struct sock *sk, long timeo,
- struct msghdr *msg, int len, int flags,
- int *addr_len)
+static int tcp_recv_urg(struct sock *sk, struct msghdr *msg, int len, int flags)
{
struct tcp_sock *tp = tcp_sk(sk);
#if TCP_DEBUG
struct sk_buff *skb = skb_peek(&sk->sk_receive_queue);
- BUG_TRAP(!skb || before(tp->copied_seq, TCP_SKB_CB(skb)->end_seq));
+ WARN_ON(skb && !before(tp->copied_seq, TCP_SKB_CB(skb)->end_seq));
#endif
if (inet_csk_ack_scheduled(sk)) {
struct sk_buff *skb;
struct tcp_sock *tp = tcp_sk(sk);
- NET_INC_STATS_USER(LINUX_MIB_TCPPREQUEUED);
+ NET_INC_STATS_USER(sock_net(sk), LINUX_MIB_TCPPREQUEUED);
/* RX process wants to run with disabled BHs, though it is not
* necessary */
local_bh_disable();
while ((skb = __skb_dequeue(&tp->ucopy.prequeue)) != NULL)
- sk->sk_backlog_rcv(sk, skb);
+ sk_backlog_rcv(sk, skb);
local_bh_enable();
/* Clear memory counter. */
struct task_struct *user_recv = NULL;
int copied_early = 0;
struct sk_buff *skb;
+ u32 urg_hole = 0;
lock_sock(sk);
if ((available < target) &&
(len > sysctl_tcp_dma_copybreak) && !(flags & MSG_PEEK) &&
!sysctl_tcp_low_latency &&
- __get_cpu_var(softnet_data).net_dma) {
+ dma_find_channel(DMA_MEMCPY)) {
preempt_enable_no_resched();
tp->ucopy.pinned_list =
dma_pin_iovec_pages(msg->msg_iov, len);
goto found_ok_skb;
if (tcp_hdr(skb)->fin)
goto found_fin_ok;
- BUG_TRAP(flags & MSG_PEEK);
+ WARN_ON(!(flags & MSG_PEEK));
skb = skb->next;
} while (skb != (struct sk_buff *)&sk->sk_receive_queue);
sk->sk_state == TCP_CLOSE ||
(sk->sk_shutdown & RCV_SHUTDOWN) ||
!timeo ||
- signal_pending(current) ||
- (flags & MSG_PEEK))
+ signal_pending(current))
break;
} else {
if (sock_flag(sk, SOCK_DONE))
tp->ucopy.len = len;
- BUG_TRAP(tp->copied_seq == tp->rcv_nxt ||
- (flags & (MSG_PEEK | MSG_TRUNC)));
+ WARN_ON(tp->copied_seq != tp->rcv_nxt &&
+ !(flags & (MSG_PEEK | MSG_TRUNC)));
/* Ugly... If prequeue is not empty, we have to
* process it before releasing socket, otherwise
/* __ Restore normal policy in scheduler __ */
if ((chunk = len - tp->ucopy.len) != 0) {
- NET_ADD_STATS_USER(LINUX_MIB_TCPDIRECTCOPYFROMBACKLOG, chunk);
+ NET_ADD_STATS_USER(sock_net(sk), LINUX_MIB_TCPDIRECTCOPYFROMBACKLOG, chunk);
len -= chunk;
copied += chunk;
}
tcp_prequeue_process(sk);
if ((chunk = len - tp->ucopy.len) != 0) {
- NET_ADD_STATS_USER(LINUX_MIB_TCPDIRECTCOPYFROMPREQUEUE, chunk);
+ NET_ADD_STATS_USER(sock_net(sk), LINUX_MIB_TCPDIRECTCOPYFROMPREQUEUE, chunk);
len -= chunk;
copied += chunk;
}
}
}
- if ((flags & MSG_PEEK) && peek_seq != tp->copied_seq) {
+ if ((flags & MSG_PEEK) &&
+ (peek_seq - copied - urg_hole != tp->copied_seq)) {
if (net_ratelimit())
printk(KERN_DEBUG "TCP(%s:%d): Application bug, race in MSG_PEEK.\n",
current->comm, task_pid_nr(current));
if (!urg_offset) {
if (!sock_flag(sk, SOCK_URGINLINE)) {
++*seq;
+ urg_hole++;
offset++;
used--;
if (!used)
if (!(flags & MSG_TRUNC)) {
#ifdef CONFIG_NET_DMA
if (!tp->ucopy.dma_chan && tp->ucopy.pinned_list)
- tp->ucopy.dma_chan = get_softnet_dma();
+ tp->ucopy.dma_chan = dma_find_channel(DMA_MEMCPY);
if (tp->ucopy.dma_chan) {
tp->ucopy.dma_cookie = dma_skb_copy_datagram_iovec(
tcp_prequeue_process(sk);
if (copied > 0 && (chunk = len - tp->ucopy.len) != 0) {
- NET_ADD_STATS_USER(LINUX_MIB_TCPDIRECTCOPYFROMPREQUEUE, chunk);
+ NET_ADD_STATS_USER(sock_net(sk), LINUX_MIB_TCPDIRECTCOPYFROMPREQUEUE, chunk);
len -= chunk;
copied += chunk;
}
/* Safe to free early-copied skbs now */
__skb_queue_purge(&sk->sk_async_wait_queue);
- dma_chan_put(tp->ucopy.dma_chan);
tp->ucopy.dma_chan = NULL;
}
if (tp->ucopy.pinned_list) {
return err;
recv_urg:
- err = tcp_recv_urg(sk, timeo, msg, len, flags, addr_len);
+ err = tcp_recv_urg(sk, msg, len, flags);
goto out;
}
switch (state) {
case TCP_ESTABLISHED:
if (oldstate != TCP_ESTABLISHED)
- TCP_INC_STATS(TCP_MIB_CURRESTAB);
+ TCP_INC_STATS(sock_net(sk), TCP_MIB_CURRESTAB);
break;
case TCP_CLOSE:
if (oldstate == TCP_CLOSE_WAIT || oldstate == TCP_ESTABLISHED)
- TCP_INC_STATS(TCP_MIB_ESTABRESETS);
+ TCP_INC_STATS(sock_net(sk), TCP_MIB_ESTABRESETS);
sk->sk_prot->unhash(sk);
if (inet_csk(sk)->icsk_bind_hash &&
inet_put_port(sk);
/* fall through */
default:
- if (oldstate==TCP_ESTABLISHED)
- TCP_DEC_STATS(TCP_MIB_CURRESTAB);
+ if (oldstate == TCP_ESTABLISHED)
+ TCP_DEC_STATS(sock_net(sk), TCP_MIB_CURRESTAB);
}
/* Change state AFTER socket is unhashed to avoid closed
sk->sk_state = state;
#ifdef STATE_TRACE
- SOCK_DEBUG(sk, "TCP sk=%p, State %s -> %s\n",sk, statename[oldstate],statename[state]);
+ SOCK_DEBUG(sk, "TCP sk=%p, State %s -> %s\n", sk, statename[oldstate], statename[state]);
#endif
}
EXPORT_SYMBOL_GPL(tcp_set_state);
*/
if (data_was_unread) {
/* Unread data was tossed, zap the connection. */
- NET_INC_STATS_USER(LINUX_MIB_TCPABORTONCLOSE);
+ NET_INC_STATS_USER(sock_net(sk), LINUX_MIB_TCPABORTONCLOSE);
tcp_set_state(sk, TCP_CLOSE);
tcp_send_active_reset(sk, GFP_KERNEL);
} else if (sock_flag(sk, SOCK_LINGER) && !sk->sk_lingertime) {
/* Check zero linger _after_ checking for unread data. */
sk->sk_prot->disconnect(sk, 0);
- NET_INC_STATS_USER(LINUX_MIB_TCPABORTONDATA);
+ NET_INC_STATS_USER(sock_net(sk), LINUX_MIB_TCPABORTONDATA);
} else if (tcp_close_state(sk)) {
/* We FIN if the application ate all the data before
* zapping the connection.
state = sk->sk_state;
sock_hold(sk);
sock_orphan(sk);
- atomic_inc(sk->sk_prot->orphan_count);
/* It is the last release_sock in its life. It will remove backlog. */
release_sock(sk);
*/
local_bh_disable();
bh_lock_sock(sk);
- BUG_TRAP(!sock_owned_by_user(sk));
+ WARN_ON(sock_owned_by_user(sk));
+
+ percpu_counter_inc(sk->sk_prot->orphan_count);
/* Have we already been destroyed by a softirq or backlog? */
if (state != TCP_CLOSE && sk->sk_state == TCP_CLOSE)
if (tp->linger2 < 0) {
tcp_set_state(sk, TCP_CLOSE);
tcp_send_active_reset(sk, GFP_ATOMIC);
- NET_INC_STATS_BH(LINUX_MIB_TCPABORTONLINGER);
+ NET_INC_STATS_BH(sock_net(sk),
+ LINUX_MIB_TCPABORTONLINGER);
} else {
const int tmo = tcp_fin_time(sk);
}
}
if (sk->sk_state != TCP_CLOSE) {
+ int orphan_count = percpu_counter_read_positive(
+ sk->sk_prot->orphan_count);
+
sk_mem_reclaim(sk);
- if (tcp_too_many_orphans(sk,
- atomic_read(sk->sk_prot->orphan_count))) {
+ if (tcp_too_many_orphans(sk, orphan_count)) {
if (net_ratelimit())
printk(KERN_INFO "TCP: too many of orphaned "
"sockets\n");
tcp_set_state(sk, TCP_CLOSE);
tcp_send_active_reset(sk, GFP_ATOMIC);
- NET_INC_STATS_BH(LINUX_MIB_TCPABORTONMEMORY);
+ NET_INC_STATS_BH(sock_net(sk),
+ LINUX_MIB_TCPABORTONMEMORY);
}
}
memset(&tp->rx_opt, 0, sizeof(tp->rx_opt));
__sk_dst_reset(sk);
- BUG_TRAP(!inet->num || icsk->icsk_bind_hash);
+ WARN_ON(inet->num && !icsk->icsk_bind_hash);
sk->sk_error_report(sk);
return err;
unsigned int seq;
__be32 delta;
unsigned int oldlen;
- unsigned int len;
+ unsigned int mss;
if (!pskb_may_pull(skb, sizeof(*th)))
goto out;
oldlen = (u16)~skb->len;
__skb_pull(skb, thlen);
+ mss = skb_shinfo(skb)->gso_size;
+ if (unlikely(skb->len <= mss))
+ goto out;
+
if (skb_gso_ok(skb, features | NETIF_F_GSO_ROBUST)) {
/* Packet is from an untrusted source, reset gso_segs. */
int type = skb_shinfo(skb)->gso_type;
- int mss;
if (unlikely(type &
~(SKB_GSO_TCPV4 |
!(type & (SKB_GSO_TCPV4 | SKB_GSO_TCPV6))))
goto out;
- mss = skb_shinfo(skb)->gso_size;
skb_shinfo(skb)->gso_segs = DIV_ROUND_UP(skb->len, mss);
segs = NULL;
if (IS_ERR(segs))
goto out;
- len = skb_shinfo(skb)->gso_size;
- delta = htonl(oldlen + (thlen + len));
+ delta = htonl(oldlen + (thlen + mss));
skb = segs;
th = tcp_hdr(skb);
csum_fold(csum_partial(skb_transport_header(skb),
thlen, skb->csum));
- seq += len;
+ seq += mss;
skb = skb->next;
th = tcp_hdr(skb);
}
EXPORT_SYMBOL(tcp_tso_segment);
-#ifdef CONFIG_TCP_MD5SIG
-static unsigned long tcp_md5sig_users;
-static struct tcp_md5sig_pool **tcp_md5sig_pool;
-static DEFINE_SPINLOCK(tcp_md5sig_pool_lock);
-
-int tcp_calc_md5_hash(char *md5_hash, struct tcp_md5sig_key *key,
- int bplen,
- struct tcphdr *th, unsigned int tcplen,
- struct tcp_md5sig_pool *hp)
+struct sk_buff **tcp_gro_receive(struct sk_buff **head, struct sk_buff *skb)
{
- struct scatterlist sg[4];
- __u16 data_len;
- int block = 0;
- __sum16 cksum;
- struct hash_desc *desc = &hp->md5_desc;
- int err;
- unsigned int nbytes = 0;
+ struct sk_buff **pp = NULL;
+ struct sk_buff *p;
+ struct tcphdr *th;
+ struct tcphdr *th2;
+ unsigned int len;
+ unsigned int thlen;
+ unsigned int flags;
+ unsigned int mss = 1;
+ int flush = 1;
+ int i;
- sg_init_table(sg, 4);
+ th = skb_gro_header(skb, sizeof(*th));
+ if (unlikely(!th))
+ goto out;
- /* 1. The TCP pseudo-header */
- sg_set_buf(&sg[block++], &hp->md5_blk, bplen);
- nbytes += bplen;
+ thlen = th->doff * 4;
+ if (thlen < sizeof(*th))
+ goto out;
- /* 2. The TCP header, excluding options, and assuming a
- * checksum of zero
- */
- cksum = th->check;
- th->check = 0;
- sg_set_buf(&sg[block++], th, sizeof(*th));
- nbytes += sizeof(*th);
-
- /* 3. The TCP segment data (if any) */
- data_len = tcplen - (th->doff << 2);
- if (data_len > 0) {
- u8 *data = (u8 *)th + (th->doff << 2);
- sg_set_buf(&sg[block++], data, data_len);
- nbytes += data_len;
- }
+ th = skb_gro_header(skb, thlen);
+ if (unlikely(!th))
+ goto out;
- /* 4. an independently-specified key or password, known to both
- * TCPs and presumably connection-specific
- */
- sg_set_buf(&sg[block++], key->key, key->keylen);
- nbytes += key->keylen;
+ skb_gro_pull(skb, thlen);
- sg_mark_end(&sg[block - 1]);
+ len = skb_gro_len(skb);
+ flags = tcp_flag_word(th);
- /* Now store the hash into the packet */
- err = crypto_hash_init(desc);
- if (err) {
- if (net_ratelimit())
- printk(KERN_WARNING "%s(): hash_init failed\n", __func__);
- return -1;
- }
- err = crypto_hash_update(desc, sg, nbytes);
- if (err) {
- if (net_ratelimit())
- printk(KERN_WARNING "%s(): hash_update failed\n", __func__);
- return -1;
+ for (; (p = *head); head = &p->next) {
+ if (!NAPI_GRO_CB(p)->same_flow)
+ continue;
+
+ th2 = tcp_hdr(p);
+
+ if ((th->source ^ th2->source) | (th->dest ^ th2->dest)) {
+ NAPI_GRO_CB(p)->same_flow = 0;
+ continue;
+ }
+
+ goto found;
}
- err = crypto_hash_final(desc, md5_hash);
- if (err) {
- if (net_ratelimit())
- printk(KERN_WARNING "%s(): hash_final failed\n", __func__);
- return -1;
+
+ goto out_check_final;
+
+found:
+ flush = NAPI_GRO_CB(p)->flush;
+ flush |= flags & TCP_FLAG_CWR;
+ flush |= (flags ^ tcp_flag_word(th2)) &
+ ~(TCP_FLAG_CWR | TCP_FLAG_FIN | TCP_FLAG_PSH);
+ flush |= (th->ack_seq ^ th2->ack_seq) | (th->window ^ th2->window);
+ for (i = sizeof(*th); !flush && i < thlen; i += 4)
+ flush |= *(u32 *)((u8 *)th + i) ^
+ *(u32 *)((u8 *)th2 + i);
+
+ mss = skb_shinfo(p)->gso_size;
+
+ flush |= (len > mss) | !len;
+ flush |= (ntohl(th2->seq) + skb_gro_len(p)) ^ ntohl(th->seq);
+
+ if (flush || skb_gro_receive(head, skb)) {
+ mss = 1;
+ goto out_check_final;
}
- /* Reset header */
- th->check = cksum;
+ p = *head;
+ th2 = tcp_hdr(p);
+ tcp_flag_word(th2) |= flags & (TCP_FLAG_FIN | TCP_FLAG_PSH);
+
+out_check_final:
+ flush = len < mss;
+ flush |= flags & (TCP_FLAG_URG | TCP_FLAG_PSH | TCP_FLAG_RST |
+ TCP_FLAG_SYN | TCP_FLAG_FIN);
+
+ if (p && (!NAPI_GRO_CB(skb)->same_flow || flush))
+ pp = head;
+
+out:
+ NAPI_GRO_CB(skb)->flush |= flush;
+
+ return pp;
+}
+EXPORT_SYMBOL(tcp_gro_receive);
+
+int tcp_gro_complete(struct sk_buff *skb)
+{
+ struct tcphdr *th = tcp_hdr(skb);
+
+ skb->csum_start = skb_transport_header(skb) - skb->head;
+ skb->csum_offset = offsetof(struct tcphdr, check);
+ skb->ip_summed = CHECKSUM_PARTIAL;
+
+ skb_shinfo(skb)->gso_segs = NAPI_GRO_CB(skb)->count;
+
+ if (th->cwr)
+ skb_shinfo(skb)->gso_type |= SKB_GSO_TCP_ECN;
return 0;
}
-EXPORT_SYMBOL(tcp_calc_md5_hash);
+EXPORT_SYMBOL(tcp_gro_complete);
+
+#ifdef CONFIG_TCP_MD5SIG
+static unsigned long tcp_md5sig_users;
+static struct tcp_md5sig_pool **tcp_md5sig_pool;
+static DEFINE_SPINLOCK(tcp_md5sig_pool_lock);
static void __tcp_free_md5sig_pool(struct tcp_md5sig_pool **pool)
{
}
EXPORT_SYMBOL(__tcp_put_md5sig_pool);
+
+int tcp_md5_hash_header(struct tcp_md5sig_pool *hp,
+ struct tcphdr *th)
+{
+ struct scatterlist sg;
+ int err;
+
+ __sum16 old_checksum = th->check;
+ th->check = 0;
+ /* options aren't included in the hash */
+ sg_init_one(&sg, th, sizeof(struct tcphdr));
+ err = crypto_hash_update(&hp->md5_desc, &sg, sizeof(struct tcphdr));
+ th->check = old_checksum;
+ return err;
+}
+
+EXPORT_SYMBOL(tcp_md5_hash_header);
+
+int tcp_md5_hash_skb_data(struct tcp_md5sig_pool *hp,
+ struct sk_buff *skb, unsigned header_len)
+{
+ struct scatterlist sg;
+ const struct tcphdr *tp = tcp_hdr(skb);
+ struct hash_desc *desc = &hp->md5_desc;
+ unsigned i;
+ const unsigned head_data_len = skb_headlen(skb) > header_len ?
+ skb_headlen(skb) - header_len : 0;
+ const struct skb_shared_info *shi = skb_shinfo(skb);
+
+ sg_init_table(&sg, 1);
+
+ sg_set_buf(&sg, ((u8 *) tp) + header_len, head_data_len);
+ if (crypto_hash_update(desc, &sg, head_data_len))
+ return 1;
+
+ for (i = 0; i < shi->nr_frags; ++i) {
+ const struct skb_frag_struct *f = &shi->frags[i];
+ sg_set_page(&sg, f->page, f->size, f->page_offset);
+ if (crypto_hash_update(desc, &sg, f->size))
+ return 1;
+ }
+
+ return 0;
+}
+
+EXPORT_SYMBOL(tcp_md5_hash_skb_data);
+
+int tcp_md5_hash_key(struct tcp_md5sig_pool *hp, struct tcp_md5sig_key *key)
+{
+ struct scatterlist sg;
+
+ sg_init_one(&sg, key->key, key->keylen);
+ return crypto_hash_update(&hp->md5_desc, &sg, key->keylen);
+}
+
+EXPORT_SYMBOL(tcp_md5_hash_key);
+
#endif
void tcp_done(struct sock *sk)
{
- if(sk->sk_state == TCP_SYN_SENT || sk->sk_state == TCP_SYN_RECV)
- TCP_INC_STATS_BH(TCP_MIB_ATTEMPTFAILS);
+ if (sk->sk_state == TCP_SYN_SENT || sk->sk_state == TCP_SYN_RECV)
+ TCP_INC_STATS_BH(sock_net(sk), TCP_MIB_ATTEMPTFAILS);
tcp_set_state(sk, TCP_CLOSE);
tcp_clear_xmit_timers(sk);
BUILD_BUG_ON(sizeof(struct tcp_skb_cb) > sizeof(skb->cb));
+ percpu_counter_init(&tcp_sockets_allocated, 0);
+ percpu_counter_init(&tcp_orphan_count, 0);
tcp_hashinfo.bind_bucket_cachep =
kmem_cache_create("tcp_bind_bucket",
sizeof(struct inet_bind_bucket), 0,
thash_entries ? 0 : 512 * 1024);
tcp_hashinfo.ehash_size = 1 << tcp_hashinfo.ehash_size;
for (i = 0; i < tcp_hashinfo.ehash_size; i++) {
- INIT_HLIST_HEAD(&tcp_hashinfo.ehash[i].chain);
- INIT_HLIST_HEAD(&tcp_hashinfo.ehash[i].twchain);
+ INIT_HLIST_NULLS_HEAD(&tcp_hashinfo.ehash[i].chain, i);
+ INIT_HLIST_NULLS_HEAD(&tcp_hashinfo.ehash[i].twchain, i);
}
if (inet_ehash_locks_alloc(&tcp_hashinfo))
panic("TCP: failed to alloc ehash_locks");
EXPORT_SYMBOL(tcp_sendpage);
EXPORT_SYMBOL(tcp_setsockopt);
EXPORT_SYMBOL(tcp_shutdown);
-EXPORT_SYMBOL(tcp_statistics);