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-rw-r--r--net/tipc/socket.c862
1 files changed, 473 insertions, 389 deletions
diff --git a/net/tipc/socket.c b/net/tipc/socket.c
index 2b02a3a80313..6cc7ddd2fb7c 100644
--- a/net/tipc/socket.c
+++ b/net/tipc/socket.c
@@ -1,8 +1,8 @@
/*
* net/tipc/socket.c: TIPC socket API
*
- * Copyright (c) 2001-2007, Ericsson AB
- * Copyright (c) 2004-2008, Wind River Systems
+ * Copyright (c) 2001-2007, 2012 Ericsson AB
+ * Copyright (c) 2004-2008, 2010-2013, Wind River Systems
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
@@ -34,44 +34,47 @@
* POSSIBILITY OF SUCH DAMAGE.
*/
-#include <net/sock.h>
-
-#include <linux/tipc.h>
-#include <linux/tipc_config.h>
-
#include "core.h"
#include "port.h"
+#include <linux/export.h>
+#include <net/sock.h>
+
#define SS_LISTENING -1 /* socket is listening */
#define SS_READY -2 /* socket is connectionless */
-#define OVERLOAD_LIMIT_BASE 5000
#define CONN_TIMEOUT_DEFAULT 8000 /* default connect timeout = 8s */
struct tipc_sock {
struct sock sk;
struct tipc_port *p;
struct tipc_portid peer_name;
- long conn_timeout;
+ unsigned int conn_timeout;
};
#define tipc_sk(sk) ((struct tipc_sock *)(sk))
-#define tipc_sk_port(sk) ((struct tipc_port *)(tipc_sk(sk)->p))
+#define tipc_sk_port(sk) (tipc_sk(sk)->p)
+
+#define tipc_rx_ready(sock) (!skb_queue_empty(&sock->sk->sk_receive_queue) || \
+ (sock->state == SS_DISCONNECTING))
static int backlog_rcv(struct sock *sk, struct sk_buff *skb);
static u32 dispatch(struct tipc_port *tport, struct sk_buff *buf);
static void wakeupdispatch(struct tipc_port *tport);
+static void tipc_data_ready(struct sock *sk, int len);
+static void tipc_write_space(struct sock *sk);
+static int release(struct socket *sock);
+static int accept(struct socket *sock, struct socket *new_sock, int flags);
static const struct proto_ops packet_ops;
static const struct proto_ops stream_ops;
static const struct proto_ops msg_ops;
static struct proto tipc_proto;
+static struct proto tipc_proto_kern;
static int sockets_enabled;
-static atomic_t tipc_queue_size = ATOMIC_INIT(0);
-
/*
* Revised TIPC socket locking policy:
*
@@ -122,27 +125,9 @@ static atomic_t tipc_queue_size = ATOMIC_INIT(0);
*
* Caller must hold socket lock
*/
-
static void advance_rx_queue(struct sock *sk)
{
- buf_discard(__skb_dequeue(&sk->sk_receive_queue));
- atomic_dec(&tipc_queue_size);
-}
-
-/**
- * discard_rx_queue - discard all buffers in socket receive queue
- *
- * Caller must hold socket lock
- */
-
-static void discard_rx_queue(struct sock *sk)
-{
- struct sk_buff *buf;
-
- while ((buf = __skb_dequeue(&sk->sk_receive_queue))) {
- atomic_dec(&tipc_queue_size);
- buf_discard(buf);
- }
+ kfree_skb(__skb_dequeue(&sk->sk_receive_queue));
}
/**
@@ -150,19 +135,16 @@ static void discard_rx_queue(struct sock *sk)
*
* Caller must hold socket lock
*/
-
static void reject_rx_queue(struct sock *sk)
{
struct sk_buff *buf;
- while ((buf = __skb_dequeue(&sk->sk_receive_queue))) {
+ while ((buf = __skb_dequeue(&sk->sk_receive_queue)))
tipc_reject_msg(buf, TIPC_ERR_NO_PORT);
- atomic_dec(&tipc_queue_size);
- }
}
/**
- * tipc_create - create a TIPC socket
+ * tipc_sk_create - create a TIPC socket
* @net: network namespace (must be default network)
* @sock: pre-allocated socket structure
* @protocol: protocol indicator (must be 0)
@@ -173,9 +155,8 @@ static void reject_rx_queue(struct sock *sk)
*
* Returns 0 on success, errno otherwise
*/
-
-static int tipc_create(struct net *net, struct socket *sock, int protocol,
- int kern)
+static int tipc_sk_create(struct net *net, struct socket *sock, int protocol,
+ int kern)
{
const struct proto_ops *ops;
socket_state state;
@@ -183,10 +164,6 @@ static int tipc_create(struct net *net, struct socket *sock, int protocol,
struct tipc_port *tp_ptr;
/* Validate arguments */
-
- if (!net_eq(net, &init_net))
- return -EAFNOSUPPORT;
-
if (unlikely(protocol != 0))
return -EPROTONOSUPPORT;
@@ -209,29 +186,33 @@ static int tipc_create(struct net *net, struct socket *sock, int protocol,
}
/* Allocate socket's protocol area */
+ if (!kern)
+ sk = sk_alloc(net, AF_TIPC, GFP_KERNEL, &tipc_proto);
+ else
+ sk = sk_alloc(net, AF_TIPC, GFP_KERNEL, &tipc_proto_kern);
- sk = sk_alloc(net, AF_TIPC, GFP_KERNEL, &tipc_proto);
if (sk == NULL)
return -ENOMEM;
/* Allocate TIPC port for socket to use */
-
- tp_ptr = tipc_createport_raw(sk, &dispatch, &wakeupdispatch,
- TIPC_LOW_IMPORTANCE);
+ tp_ptr = tipc_createport(sk, &dispatch, &wakeupdispatch,
+ TIPC_LOW_IMPORTANCE);
if (unlikely(!tp_ptr)) {
sk_free(sk);
return -ENOMEM;
}
/* Finish initializing socket data structures */
-
sock->ops = ops;
sock->state = state;
sock_init_data(sock, sk);
sk->sk_backlog_rcv = backlog_rcv;
+ sk->sk_rcvbuf = sysctl_tipc_rmem[1];
+ sk->sk_data_ready = tipc_data_ready;
+ sk->sk_write_space = tipc_write_space;
tipc_sk(sk)->p = tp_ptr;
- tipc_sk(sk)->conn_timeout = msecs_to_jiffies(CONN_TIMEOUT_DEFAULT);
+ tipc_sk(sk)->conn_timeout = CONN_TIMEOUT_DEFAULT;
spin_unlock_bh(tp_ptr->lock);
@@ -241,11 +222,82 @@ static int tipc_create(struct net *net, struct socket *sock, int protocol,
tipc_set_portunreliable(tp_ptr->ref, 1);
}
- atomic_inc(&tipc_user_count);
return 0;
}
/**
+ * tipc_sock_create_local - create TIPC socket from inside TIPC module
+ * @type: socket type - SOCK_RDM or SOCK_SEQPACKET
+ *
+ * We cannot use sock_creat_kern here because it bumps module user count.
+ * Since socket owner and creator is the same module we must make sure
+ * that module count remains zero for module local sockets, otherwise
+ * we cannot do rmmod.
+ *
+ * Returns 0 on success, errno otherwise
+ */
+int tipc_sock_create_local(int type, struct socket **res)
+{
+ int rc;
+ struct sock *sk;
+
+ rc = sock_create_lite(AF_TIPC, type, 0, res);
+ if (rc < 0) {
+ pr_err("Failed to create kernel socket\n");
+ return rc;
+ }
+ tipc_sk_create(&init_net, *res, 0, 1);
+
+ sk = (*res)->sk;
+
+ return 0;
+}
+
+/**
+ * tipc_sock_release_local - release socket created by tipc_sock_create_local
+ * @sock: the socket to be released.
+ *
+ * Module reference count is not incremented when such sockets are created,
+ * so we must keep it from being decremented when they are released.
+ */
+void tipc_sock_release_local(struct socket *sock)
+{
+ release(sock);
+ sock->ops = NULL;
+ sock_release(sock);
+}
+
+/**
+ * tipc_sock_accept_local - accept a connection on a socket created
+ * with tipc_sock_create_local. Use this function to avoid that
+ * module reference count is inadvertently incremented.
+ *
+ * @sock: the accepting socket
+ * @newsock: reference to the new socket to be created
+ * @flags: socket flags
+ */
+
+int tipc_sock_accept_local(struct socket *sock, struct socket **newsock,
+ int flags)
+{
+ struct sock *sk = sock->sk;
+ int ret;
+
+ ret = sock_create_lite(sk->sk_family, sk->sk_type,
+ sk->sk_protocol, newsock);
+ if (ret < 0)
+ return ret;
+
+ ret = accept(sock, *newsock, flags);
+ if (ret < 0) {
+ sock_release(*newsock);
+ return ret;
+ }
+ (*newsock)->ops = sock->ops;
+ return ret;
+}
+
+/**
* release - destroy a TIPC socket
* @sock: socket to destroy
*
@@ -261,7 +313,6 @@ static int tipc_create(struct net *net, struct socket *sock, int protocol,
*
* Returns 0 on success, errno otherwise
*/
-
static int release(struct socket *sock)
{
struct sock *sk = sock->sk;
@@ -273,7 +324,6 @@ static int release(struct socket *sock)
* Exit if socket isn't fully initialized (occurs when a failed accept()
* releases a pre-allocated child socket that was never used)
*/
-
if (sk == NULL)
return 0;
@@ -284,14 +334,12 @@ static int release(struct socket *sock)
* Reject all unreceived messages, except on an active connection
* (which disconnects locally & sends a 'FIN+' to peer)
*/
-
while (sock->state != SS_DISCONNECTING) {
buf = __skb_dequeue(&sk->sk_receive_queue);
if (buf == NULL)
break;
- atomic_dec(&tipc_queue_size);
- if (TIPC_SKB_CB(buf)->handle != msg_data(buf_msg(buf)))
- buf_discard(buf);
+ if (TIPC_SKB_CB(buf)->handle != 0)
+ kfree_skb(buf);
else {
if ((sock->state == SS_CONNECTING) ||
(sock->state == SS_CONNECTED)) {
@@ -306,22 +354,18 @@ static int release(struct socket *sock)
* Delete TIPC port; this ensures no more messages are queued
* (also disconnects an active connection & sends a 'FIN-' to peer)
*/
-
res = tipc_deleteport(tport->ref);
/* Discard any remaining (connection-based) messages in receive queue */
-
- discard_rx_queue(sk);
+ __skb_queue_purge(&sk->sk_receive_queue);
/* Reject any messages that accumulated in backlog queue */
-
sock->state = SS_DISCONNECTING;
release_sock(sk);
sock_put(sk);
sock->sk = NULL;
- atomic_dec(&tipc_user_count);
return res;
}
@@ -340,7 +384,6 @@ static int release(struct socket *sock)
* NOTE: This routine doesn't need to take the socket lock since it doesn't
* access any non-constant socket information.
*/
-
static int bind(struct socket *sock, struct sockaddr *uaddr, int uaddr_len)
{
struct sockaddr_tipc *addr = (struct sockaddr_tipc *)uaddr;
@@ -359,6 +402,11 @@ static int bind(struct socket *sock, struct sockaddr *uaddr, int uaddr_len)
else if (addr->addrtype != TIPC_ADDR_NAMESEQ)
return -EAFNOSUPPORT;
+ if ((addr->addr.nameseq.type < TIPC_RESERVED_TYPES) &&
+ (addr->addr.nameseq.type != TIPC_TOP_SRV) &&
+ (addr->addr.nameseq.type != TIPC_CFG_SRV))
+ return -EACCES;
+
return (addr->scope > 0) ?
tipc_publish(portref, addr->scope, &addr->addr.nameseq) :
tipc_withdraw(portref, -addr->scope, &addr->addr.nameseq);
@@ -377,7 +425,6 @@ static int bind(struct socket *sock, struct sockaddr *uaddr, int uaddr_len)
* accesses socket information that is unchanging (or which changes in
* a completely predictable manner).
*/
-
static int get_name(struct socket *sock, struct sockaddr *uaddr,
int *uaddr_len, int peer)
{
@@ -424,7 +471,7 @@ static int get_name(struct socket *sock, struct sockaddr *uaddr,
* socket state flags set
* ------------ ---------
* unconnected no read flags
- * no write flags
+ * POLLOUT if port is not congested
*
* connecting POLLIN/POLLRDNORM if ACK/NACK in rx queue
* no write flags
@@ -445,16 +492,19 @@ static int get_name(struct socket *sock, struct sockaddr *uaddr,
* imply that the operation will succeed, merely that it should be performed
* and will not block.
*/
-
static unsigned int poll(struct file *file, struct socket *sock,
poll_table *wait)
{
struct sock *sk = sock->sk;
u32 mask = 0;
- poll_wait(file, sk_sleep(sk), wait);
+ sock_poll_wait(file, sk_sleep(sk), wait);
switch ((int)sock->state) {
+ case SS_UNCONNECTED:
+ if (!tipc_sk_port(sk)->congested)
+ mask |= POLLOUT;
+ break;
case SS_READY:
case SS_CONNECTED:
if (!tipc_sk_port(sk)->congested)
@@ -483,7 +533,6 @@ static unsigned int poll(struct file *file, struct socket *sock,
*
* Returns 0 if permission is granted, otherwise errno
*/
-
static int dest_name_check(struct sockaddr_tipc *dest, struct msghdr *m)
{
struct tipc_cfg_msg_hdr hdr;
@@ -495,6 +544,8 @@ static int dest_name_check(struct sockaddr_tipc *dest, struct msghdr *m)
if (likely(dest->addr.name.name.type != TIPC_CFG_SRV))
return -EACCES;
+ if (!m->msg_iovlen || (m->msg_iov[0].iov_len < sizeof(hdr)))
+ return -EMSGSIZE;
if (copy_from_user(&hdr, m->msg_iov[0].iov_base, sizeof(hdr)))
return -EFAULT;
if ((ntohs(hdr.tcm_type) & 0xC000) && (!capable(CAP_NET_ADMIN)))
@@ -517,7 +568,6 @@ static int dest_name_check(struct sockaddr_tipc *dest, struct msghdr *m)
*
* Returns the number of bytes sent on success, or errno otherwise
*/
-
static int send_msg(struct kiocb *iocb, struct socket *sock,
struct msghdr *m, size_t total_len)
{
@@ -525,6 +575,7 @@ static int send_msg(struct kiocb *iocb, struct socket *sock,
struct tipc_port *tport = tipc_sk_port(sk);
struct sockaddr_tipc *dest = (struct sockaddr_tipc *)m->msg_name;
int needs_conn;
+ long timeout_val;
int res = -EINVAL;
if (unlikely(!dest))
@@ -532,6 +583,8 @@ static int send_msg(struct kiocb *iocb, struct socket *sock,
if (unlikely((m->msg_namelen < sizeof(*dest)) ||
(dest->family != AF_TIPC)))
return -EINVAL;
+ if (total_len > TIPC_MAX_USER_MSG_SIZE)
+ return -EMSGSIZE;
if (iocb)
lock_sock(sk);
@@ -546,8 +599,7 @@ static int send_msg(struct kiocb *iocb, struct socket *sock,
res = -EISCONN;
goto exit;
}
- if ((tport->published) ||
- ((sock->type == SOCK_STREAM) && (total_len != 0))) {
+ if (tport->published) {
res = -EOPNOTSUPP;
goto exit;
}
@@ -557,10 +609,11 @@ static int send_msg(struct kiocb *iocb, struct socket *sock,
}
/* Abort any pending connection attempts (very unlikely) */
-
reject_rx_queue(sk);
}
+ timeout_val = sock_sndtimeo(sk, m->msg_flags & MSG_DONTWAIT);
+
do {
if (dest->addrtype == TIPC_ADDR_NAME) {
res = dest_name_check(dest, m);
@@ -570,12 +623,14 @@ static int send_msg(struct kiocb *iocb, struct socket *sock,
&dest->addr.name.name,
dest->addr.name.domain,
m->msg_iovlen,
- m->msg_iov);
+ m->msg_iov,
+ total_len);
} else if (dest->addrtype == TIPC_ADDR_ID) {
res = tipc_send2port(tport->ref,
&dest->addr.id,
m->msg_iovlen,
- m->msg_iov);
+ m->msg_iov,
+ total_len);
} else if (dest->addrtype == TIPC_ADDR_MCAST) {
if (needs_conn) {
res = -EOPNOTSUPP;
@@ -587,23 +642,22 @@ static int send_msg(struct kiocb *iocb, struct socket *sock,
res = tipc_multicast(tport->ref,
&dest->addr.nameseq,
m->msg_iovlen,
- m->msg_iov);
+ m->msg_iov,
+ total_len);
}
if (likely(res != -ELINKCONG)) {
if (needs_conn && (res >= 0))
sock->state = SS_CONNECTING;
break;
}
- if (m->msg_flags & MSG_DONTWAIT) {
- res = -EWOULDBLOCK;
+ if (timeout_val <= 0L) {
+ res = timeout_val ? timeout_val : -EWOULDBLOCK;
break;
}
release_sock(sk);
- res = wait_event_interruptible(*sk_sleep(sk),
- !tport->congested);
+ timeout_val = wait_event_interruptible_timeout(*sk_sleep(sk),
+ !tport->congested, timeout_val);
lock_sock(sk);
- if (res)
- break;
} while (1);
exit:
@@ -623,23 +677,27 @@ exit:
*
* Returns the number of bytes sent on success, or errno otherwise
*/
-
static int send_packet(struct kiocb *iocb, struct socket *sock,
struct msghdr *m, size_t total_len)
{
struct sock *sk = sock->sk;
struct tipc_port *tport = tipc_sk_port(sk);
struct sockaddr_tipc *dest = (struct sockaddr_tipc *)m->msg_name;
+ long timeout_val;
int res;
/* Handle implied connection establishment */
-
if (unlikely(dest))
return send_msg(iocb, sock, m, total_len);
+ if (total_len > TIPC_MAX_USER_MSG_SIZE)
+ return -EMSGSIZE;
+
if (iocb)
lock_sock(sk);
+ timeout_val = sock_sndtimeo(sk, m->msg_flags & MSG_DONTWAIT);
+
do {
if (unlikely(sock->state != SS_CONNECTED)) {
if (sock->state == SS_DISCONNECTING)
@@ -649,19 +707,18 @@ static int send_packet(struct kiocb *iocb, struct socket *sock,
break;
}
- res = tipc_send(tport->ref, m->msg_iovlen, m->msg_iov);
+ res = tipc_send(tport->ref, m->msg_iovlen, m->msg_iov,
+ total_len);
if (likely(res != -ELINKCONG))
break;
- if (m->msg_flags & MSG_DONTWAIT) {
- res = -EWOULDBLOCK;
+ if (timeout_val <= 0L) {
+ res = timeout_val ? timeout_val : -EWOULDBLOCK;
break;
}
release_sock(sk);
- res = wait_event_interruptible(*sk_sleep(sk),
- (!tport->congested || !tport->connected));
+ timeout_val = wait_event_interruptible_timeout(*sk_sleep(sk),
+ (!tport->congested || !tport->connected), timeout_val);
lock_sock(sk);
- if (res)
- break;
} while (1);
if (iocb)
@@ -681,7 +738,6 @@ static int send_packet(struct kiocb *iocb, struct socket *sock,
* Returns the number of bytes sent on success (or partial success),
* or errno if no data sent
*/
-
static int send_stream(struct kiocb *iocb, struct socket *sock,
struct msghdr *m, size_t total_len)
{
@@ -701,7 +757,6 @@ static int send_stream(struct kiocb *iocb, struct socket *sock,
lock_sock(sk);
/* Handle special cases where there is no connection */
-
if (unlikely(sock->state != SS_CONNECTED)) {
if (sock->state == SS_UNCONNECTED) {
res = send_packet(NULL, sock, m, total_len);
@@ -720,6 +775,11 @@ static int send_stream(struct kiocb *iocb, struct socket *sock,
goto exit;
}
+ if (total_len > (unsigned int)INT_MAX) {
+ res = -EMSGSIZE;
+ goto exit;
+ }
+
/*
* Send each iovec entry using one or more messages
*
@@ -727,7 +787,6 @@ static int send_stream(struct kiocb *iocb, struct socket *sock,
* (i.e. one large iovec entry), but could be improved to pass sets
* of small iovec entries into send_packet().
*/
-
curr_iov = m->msg_iov;
curr_iovlen = m->msg_iovlen;
my_msg.msg_iov = &my_iov;
@@ -750,7 +809,7 @@ static int send_stream(struct kiocb *iocb, struct socket *sock,
bytes_to_send = curr_left;
my_iov.iov_base = curr_start;
my_iov.iov_len = bytes_to_send;
- res = send_packet(NULL, sock, &my_msg, 0);
+ res = send_packet(NULL, sock, &my_msg, bytes_to_send);
if (res < 0) {
if (bytes_sent)
res = bytes_sent;
@@ -776,20 +835,22 @@ exit:
*
* Returns 0 on success, errno otherwise
*/
-
static int auto_connect(struct socket *sock, struct tipc_msg *msg)
{
struct tipc_sock *tsock = tipc_sk(sock->sk);
-
- if (msg_errcode(msg)) {
- sock->state = SS_DISCONNECTING;
- return -ECONNREFUSED;
- }
+ struct tipc_port *p_ptr;
tsock->peer_name.ref = msg_origport(msg);
tsock->peer_name.node = msg_orignode(msg);
- tipc_connect2port(tsock->p->ref, &tsock->peer_name);
- tipc_set_portimportance(tsock->p->ref, msg_importance(msg));
+ p_ptr = tipc_port_deref(tsock->p->ref);
+ if (!p_ptr)
+ return -EINVAL;
+
+ __tipc_connect(tsock->p->ref, p_ptr, &tsock->peer_name);
+
+ if (msg_importance(msg) > TIPC_CRITICAL_IMPORTANCE)
+ return -EINVAL;
+ msg_set_importance(&p_ptr->phdr, (u32)msg_importance(msg));
sock->state = SS_CONNECTED;
return 0;
}
@@ -801,7 +862,6 @@ static int auto_connect(struct socket *sock, struct tipc_msg *msg)
*
* Note: Address is not captured if not requested by receiver.
*/
-
static void set_orig_addr(struct msghdr *m, struct tipc_msg *msg)
{
struct sockaddr_tipc *addr = (struct sockaddr_tipc *)m->msg_name;
@@ -809,6 +869,7 @@ static void set_orig_addr(struct msghdr *m, struct tipc_msg *msg)
if (addr) {
addr->family = AF_TIPC;
addr->addrtype = TIPC_ADDR_ID;
+ memset(&addr->addr, 0, sizeof(addr->addr));
addr->addr.id.ref = msg_origport(msg);
addr->addr.id.node = msg_orignode(msg);
addr->addr.name.domain = 0; /* could leave uninitialized */
@@ -827,9 +888,8 @@ static void set_orig_addr(struct msghdr *m, struct tipc_msg *msg)
*
* Returns 0 if successful, otherwise errno
*/
-
static int anc_data_recv(struct msghdr *m, struct tipc_msg *msg,
- struct tipc_port *tport)
+ struct tipc_port *tport)
{
u32 anc_data[3];
u32 err;
@@ -841,7 +901,6 @@ static int anc_data_recv(struct msghdr *m, struct tipc_msg *msg,
return 0;
/* Optionally capture errored message object(s) */
-
err = msg ? msg_errcode(msg) : 0;
if (unlikely(err)) {
anc_data[0] = err;
@@ -858,7 +917,6 @@ static int anc_data_recv(struct msghdr *m, struct tipc_msg *msg,
}
/* Optionally capture message destination object */
-
dest_type = msg ? msg_type(msg) : TIPC_DIRECT_MSG;
switch (dest_type) {
case TIPC_NAMED_MSG:
@@ -903,7 +961,6 @@ static int anc_data_recv(struct msghdr *m, struct tipc_msg *msg,
*
* Returns size of returned message data, errno otherwise
*/
-
static int recv_msg(struct kiocb *iocb, struct socket *sock,
struct msghdr *m, size_t buf_len, int flags)
{
@@ -911,15 +968,12 @@ static int recv_msg(struct kiocb *iocb, struct socket *sock,
struct tipc_port *tport = tipc_sk_port(sk);
struct sk_buff *buf;
struct tipc_msg *msg;
+ long timeout;
unsigned int sz;
u32 err;
int res;
/* Catch invalid receive requests */
-
- if (m->msg_iovlen != 1)
- return -EOPNOTSUPP; /* Don't do multiple iovec entries yet */
-
if (unlikely(!buf_len))
return -EINVAL;
@@ -930,72 +984,59 @@ static int recv_msg(struct kiocb *iocb, struct socket *sock,
goto exit;
}
+ /* will be updated in set_orig_addr() if needed */
+ m->msg_namelen = 0;
+
+ timeout = sock_rcvtimeo(sk, flags & MSG_DONTWAIT);
restart:
/* Look for a message in receive queue; wait if necessary */
-
while (skb_queue_empty(&sk->sk_receive_queue)) {
if (sock->state == SS_DISCONNECTING) {
res = -ENOTCONN;
goto exit;
}
- if (flags & MSG_DONTWAIT) {
- res = -EWOULDBLOCK;
+ if (timeout <= 0L) {
+ res = timeout ? timeout : -EWOULDBLOCK;
goto exit;
}
release_sock(sk);
- res = wait_event_interruptible(*sk_sleep(sk),
- (!skb_queue_empty(&sk->sk_receive_queue) ||
- (sock->state == SS_DISCONNECTING)));
+ timeout = wait_event_interruptible_timeout(*sk_sleep(sk),
+ tipc_rx_ready(sock),
+ timeout);
lock_sock(sk);
- if (res)
- goto exit;
}
/* Look at first message in receive queue */
-
buf = skb_peek(&sk->sk_receive_queue);
msg = buf_msg(buf);
sz = msg_data_sz(msg);
err = msg_errcode(msg);
- /* Complete connection setup for an implied connect */
-
- if (unlikely(sock->state == SS_CONNECTING)) {
- res = auto_connect(sock, msg);
- if (res)
- goto exit;
- }
-
/* Discard an empty non-errored message & try again */
-
if ((!sz) && (!err)) {
advance_rx_queue(sk);
goto restart;
}
/* Capture sender's address (optional) */
-
set_orig_addr(m, msg);
/* Capture ancillary data (optional) */
-
res = anc_data_recv(m, msg, tport);
if (res)
goto exit;
/* Capture message data (if valid) & compute return value (always) */
-
if (!err) {
if (unlikely(buf_len < sz)) {
sz = buf_len;
m->msg_flags |= MSG_TRUNC;
}
- if (unlikely(copy_to_user(m->msg_iov->iov_base, msg_data(msg),
- sz))) {
- res = -EFAULT;
+ res = skb_copy_datagram_iovec(buf, msg_hdr_sz(msg),
+ m->msg_iov, sz);
+ if (res)
goto exit;
- }
res = sz;
} else {
if ((sock->state == SS_READY) ||
@@ -1006,7 +1047,6 @@ restart:
}
/* Consume received message (optional) */
-
if (likely(!(flags & MSG_PEEK))) {
if ((sock->state != SS_READY) &&
(++tport->conn_unacked >= TIPC_FLOW_CONTROL_WIN))
@@ -1030,7 +1070,6 @@ exit:
*
* Returns size of returned message data, errno otherwise
*/
-
static int recv_stream(struct kiocb *iocb, struct socket *sock,
struct msghdr *m, size_t buf_len, int flags)
{
@@ -1038,70 +1077,61 @@ static int recv_stream(struct kiocb *iocb, struct socket *sock,
struct tipc_port *tport = tipc_sk_port(sk);
struct sk_buff *buf;
struct tipc_msg *msg;
+ long timeout;
unsigned int sz;
int sz_to_copy, target, needed;
int sz_copied = 0;
- char __user *crs = m->msg_iov->iov_base;
- unsigned char *buf_crs;
u32 err;
int res = 0;
/* Catch invalid receive attempts */
-
- if (m->msg_iovlen != 1)
- return -EOPNOTSUPP; /* Don't do multiple iovec entries yet */
-
if (unlikely(!buf_len))
return -EINVAL;
lock_sock(sk);
- if (unlikely((sock->state == SS_UNCONNECTED) ||
- (sock->state == SS_CONNECTING))) {
+ if (unlikely((sock->state == SS_UNCONNECTED))) {
res = -ENOTCONN;
goto exit;
}
+ /* will be updated in set_orig_addr() if needed */
+ m->msg_namelen = 0;
+
target = sock_rcvlowat(sk, flags & MSG_WAITALL, buf_len);
+ timeout = sock_rcvtimeo(sk, flags & MSG_DONTWAIT);
restart:
-
/* Look for a message in receive queue; wait if necessary */
-
while (skb_queue_empty(&sk->sk_receive_queue)) {
if (sock->state == SS_DISCONNECTING) {
res = -ENOTCONN;
goto exit;
}
- if (flags & MSG_DONTWAIT) {
- res = -EWOULDBLOCK;
+ if (timeout <= 0L) {
+ res = timeout ? timeout : -EWOULDBLOCK;
goto exit;
}
release_sock(sk);
- res = wait_event_interruptible(*sk_sleep(sk),
- (!skb_queue_empty(&sk->sk_receive_queue) ||
- (sock->state == SS_DISCONNECTING)));
+ timeout = wait_event_interruptible_timeout(*sk_sleep(sk),
+ tipc_rx_ready(sock),
+ timeout);
lock_sock(sk);
- if (res)
- goto exit;
}
/* Look at first message in receive queue */
-
buf = skb_peek(&sk->sk_receive_queue);
msg = buf_msg(buf);
sz = msg_data_sz(msg);
err = msg_errcode(msg);
/* Discard an empty non-errored message & try again */
-
if ((!sz) && (!err)) {
advance_rx_queue(sk);
goto restart;
}
/* Optionally capture sender's address & ancillary data of first msg */
-
if (sz_copied == 0) {
set_orig_addr(m, msg);
res = anc_data_recv(m, msg, tport);
@@ -1110,26 +1140,26 @@ restart:
}
/* Capture message data (if valid) & compute return value (always) */
-
if (!err) {
- buf_crs = (unsigned char *)(TIPC_SKB_CB(buf)->handle);
- sz = (unsigned char *)msg + msg_size(msg) - buf_crs;
+ u32 offset = (u32)(unsigned long)(TIPC_SKB_CB(buf)->handle);
+ sz -= offset;
needed = (buf_len - sz_copied);
sz_to_copy = (sz <= needed) ? sz : needed;
- if (unlikely(copy_to_user(crs, buf_crs, sz_to_copy))) {
- res = -EFAULT;
+
+ res = skb_copy_datagram_iovec(buf, msg_hdr_sz(msg) + offset,
+ m->msg_iov, sz_to_copy);
+ if (res)
goto exit;
- }
+
sz_copied += sz_to_copy;
if (sz_to_copy < sz) {
if (!(flags & MSG_PEEK))
- TIPC_SKB_CB(buf)->handle = buf_crs + sz_to_copy;
+ TIPC_SKB_CB(buf)->handle =
+ (void *)(unsigned long)(offset + sz_to_copy);
goto exit;
}
-
- crs += sz_to_copy;
} else {
if (sz_copied != 0)
goto exit; /* can't add error msg to valid data */
@@ -1141,7 +1171,6 @@ restart:
}
/* Consume received message (optional) */
-
if (likely(!(flags & MSG_PEEK))) {
if (unlikely(++tport->conn_unacked >= TIPC_FLOW_CONTROL_WIN))
tipc_acknowledge(tport->ref, tport->conn_unacked);
@@ -1149,7 +1178,6 @@ restart:
}
/* 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 */
@@ -1163,32 +1191,144 @@ exit:
}
/**
- * rx_queue_full - determine if receive queue can accept another message
- * @msg: message to be added to queue
- * @queue_size: current size of queue
- * @base: nominal maximum size of queue
+ * tipc_write_space - wake up thread if port congestion is released
+ * @sk: socket
+ */
+static void tipc_write_space(struct sock *sk)
+{
+ struct socket_wq *wq;
+
+ rcu_read_lock();
+ wq = rcu_dereference(sk->sk_wq);
+ if (wq_has_sleeper(wq))
+ wake_up_interruptible_sync_poll(&wq->wait, POLLOUT |
+ POLLWRNORM | POLLWRBAND);
+ rcu_read_unlock();
+}
+
+/**
+ * tipc_data_ready - wake up threads to indicate messages have been received
+ * @sk: socket
+ * @len: the length of messages
+ */
+static void tipc_data_ready(struct sock *sk, int len)
+{
+ struct socket_wq *wq;
+
+ rcu_read_lock();
+ wq = rcu_dereference(sk->sk_wq);
+ if (wq_has_sleeper(wq))
+ wake_up_interruptible_sync_poll(&wq->wait, POLLIN |
+ POLLRDNORM | POLLRDBAND);
+ rcu_read_unlock();
+}
+
+/**
+ * filter_connect - Handle all incoming messages for a connection-based socket
+ * @tsock: TIPC socket
+ * @msg: message
*
- * Returns 1 if queue is unable to accept message, 0 otherwise
+ * Returns TIPC error status code and socket error status code
+ * once it encounters some errors
*/
+static u32 filter_connect(struct tipc_sock *tsock, struct sk_buff **buf)
+{
+ struct socket *sock = tsock->sk.sk_socket;
+ struct tipc_msg *msg = buf_msg(*buf);
+ struct sock *sk = &tsock->sk;
+ u32 retval = TIPC_ERR_NO_PORT;
+ int res;
+
+ if (msg_mcast(msg))
+ return retval;
+
+ switch ((int)sock->state) {
+ case SS_CONNECTED:
+ /* Accept only connection-based messages sent by peer */
+ if (msg_connected(msg) && tipc_port_peer_msg(tsock->p, msg)) {
+ if (unlikely(msg_errcode(msg))) {
+ sock->state = SS_DISCONNECTING;
+ __tipc_disconnect(tsock->p);
+ }
+ retval = TIPC_OK;
+ }
+ break;
+ case SS_CONNECTING:
+ /* Accept only ACK or NACK message */
+ if (unlikely(msg_errcode(msg))) {
+ sock->state = SS_DISCONNECTING;
+ sk->sk_err = ECONNREFUSED;
+ retval = TIPC_OK;
+ break;
+ }
+
+ if (unlikely(!msg_connected(msg)))
+ break;
+
+ res = auto_connect(sock, msg);
+ if (res) {
+ sock->state = SS_DISCONNECTING;
+ sk->sk_err = -res;
+ retval = TIPC_OK;
+ break;
+ }
-static int rx_queue_full(struct tipc_msg *msg, u32 queue_size, u32 base)
+ /* If an incoming message is an 'ACK-', it should be
+ * discarded here because it doesn't contain useful
+ * data. In addition, we should try to wake up
+ * connect() routine if sleeping.
+ */
+ if (msg_data_sz(msg) == 0) {
+ kfree_skb(*buf);
+ *buf = NULL;
+ if (waitqueue_active(sk_sleep(sk)))
+ wake_up_interruptible(sk_sleep(sk));
+ }
+ retval = TIPC_OK;
+ break;
+ case SS_LISTENING:
+ case SS_UNCONNECTED:
+ /* Accept only SYN message */
+ if (!msg_connected(msg) && !(msg_errcode(msg)))
+ retval = TIPC_OK;
+ break;
+ case SS_DISCONNECTING:
+ break;
+ default:
+ pr_err("Unknown socket state %u\n", sock->state);
+ }
+ return retval;
+}
+
+/**
+ * rcvbuf_limit - get proper overload limit of socket receive queue
+ * @sk: socket
+ * @buf: message
+ *
+ * For all connection oriented messages, irrespective of importance,
+ * the default overload value (i.e. 67MB) is set as limit.
+ *
+ * For all connectionless messages, by default new queue limits are
+ * as belows:
+ *
+ * TIPC_LOW_IMPORTANCE (4 MB)
+ * TIPC_MEDIUM_IMPORTANCE (8 MB)
+ * TIPC_HIGH_IMPORTANCE (16 MB)
+ * TIPC_CRITICAL_IMPORTANCE (32 MB)
+ *
+ * Returns overload limit according to corresponding message importance
+ */
+static unsigned int rcvbuf_limit(struct sock *sk, struct sk_buff *buf)
{
- u32 threshold;
- u32 imp = msg_importance(msg);
-
- if (imp == TIPC_LOW_IMPORTANCE)
- threshold = base;
- else if (imp == TIPC_MEDIUM_IMPORTANCE)
- threshold = base * 2;
- else if (imp == TIPC_HIGH_IMPORTANCE)
- threshold = base * 100;
- else
- return 0;
+ struct tipc_msg *msg = buf_msg(buf);
+ unsigned int limit;
if (msg_connected(msg))
- threshold *= 4;
-
- return queue_size >= threshold;
+ limit = sysctl_tipc_rmem[2];
+ else
+ limit = sk->sk_rcvbuf >> TIPC_CRITICAL_IMPORTANCE <<
+ msg_importance(msg);
+ return limit;
}
/**
@@ -1203,72 +1343,36 @@ static int rx_queue_full(struct tipc_msg *msg, u32 queue_size, u32 base)
*
* Returns TIPC error status code (TIPC_OK if message is not to be rejected)
*/
-
static u32 filter_rcv(struct sock *sk, struct sk_buff *buf)
{
struct socket *sock = sk->sk_socket;
struct tipc_msg *msg = buf_msg(buf);
- u32 recv_q_len;
+ unsigned int limit = rcvbuf_limit(sk, buf);
+ u32 res = TIPC_OK;
/* Reject message if it is wrong sort of message for socket */
-
- /*
- * WOULD IT BE BETTER TO JUST DISCARD THESE MESSAGES INSTEAD?
- * "NO PORT" ISN'T REALLY THE RIGHT ERROR CODE, AND THERE MAY
- * BE SECURITY IMPLICATIONS INHERENT IN REJECTING INVALID TRAFFIC
- */
+ if (msg_type(msg) > TIPC_DIRECT_MSG)
+ return TIPC_ERR_NO_PORT;
if (sock->state == SS_READY) {
if (msg_connected(msg))
return TIPC_ERR_NO_PORT;
} else {
- if (msg_mcast(msg))
- return TIPC_ERR_NO_PORT;
- if (sock->state == SS_CONNECTED) {
- if (!msg_connected(msg))
- return TIPC_ERR_NO_PORT;
- } else if (sock->state == SS_CONNECTING) {
- if (!msg_connected(msg) && (msg_errcode(msg) == 0))
- return TIPC_ERR_NO_PORT;
- } else if (sock->state == SS_LISTENING) {
- if (msg_connected(msg) || msg_errcode(msg))
- return TIPC_ERR_NO_PORT;
- } else if (sock->state == SS_DISCONNECTING) {
- return TIPC_ERR_NO_PORT;
- } else /* (sock->state == SS_UNCONNECTED) */ {
- if (msg_connected(msg) || msg_errcode(msg))
- return TIPC_ERR_NO_PORT;
- }
+ res = filter_connect(tipc_sk(sk), &buf);
+ if (res != TIPC_OK || buf == NULL)
+ return res;
}
/* Reject message if there isn't room to queue it */
+ if (sk_rmem_alloc_get(sk) + buf->truesize >= limit)
+ return TIPC_ERR_OVERLOAD;
- recv_q_len = (u32)atomic_read(&tipc_queue_size);
- if (unlikely(recv_q_len >= OVERLOAD_LIMIT_BASE)) {
- if (rx_queue_full(msg, recv_q_len, OVERLOAD_LIMIT_BASE))
- return TIPC_ERR_OVERLOAD;
- }
- recv_q_len = skb_queue_len(&sk->sk_receive_queue);
- if (unlikely(recv_q_len >= (OVERLOAD_LIMIT_BASE / 2))) {
- if (rx_queue_full(msg, recv_q_len, OVERLOAD_LIMIT_BASE / 2))
- return TIPC_ERR_OVERLOAD;
- }
-
- /* Enqueue message (finally!) */
-
- TIPC_SKB_CB(buf)->handle = msg_data(msg);
- atomic_inc(&tipc_queue_size);
+ /* Enqueue message */
+ TIPC_SKB_CB(buf)->handle = 0;
__skb_queue_tail(&sk->sk_receive_queue, buf);
+ skb_set_owner_r(buf, sk);
- /* Initiate connection termination for an incoming 'FIN' */
-
- if (unlikely(msg_errcode(msg) && (sock->state == SS_CONNECTED))) {
- sock->state = SS_DISCONNECTING;
- tipc_disconnect_port(tipc_sk_port(sk));
- }
-
- if (waitqueue_active(sk_sleep(sk)))
- wake_up_interruptible(sk_sleep(sk));
+ sk->sk_data_ready(sk, 0);
return TIPC_OK;
}
@@ -1281,7 +1385,6 @@ static u32 filter_rcv(struct sock *sk, struct sk_buff *buf)
*
* Returns 0
*/
-
static int backlog_rcv(struct sock *sk, struct sk_buff *buf)
{
u32 res;
@@ -1301,10 +1404,9 @@ static int backlog_rcv(struct sock *sk, struct sk_buff *buf)
*
* Returns TIPC error status code (TIPC_OK if message is not to be rejected)
*/
-
static u32 dispatch(struct tipc_port *tport, struct sk_buff *buf)
{
- struct sock *sk = (struct sock *)tport->usr_handle;
+ struct sock *sk = tport->sk;
u32 res;
/*
@@ -1313,12 +1415,11 @@ static u32 dispatch(struct tipc_port *tport, struct sk_buff *buf)
* This code is based on sk_receive_skb(), but must be distinct from it
* since a TIPC-specific filter/reject mechanism is utilized
*/
-
bh_lock_sock(sk);
if (!sock_owned_by_user(sk)) {
res = filter_rcv(sk, buf);
} else {
- if (sk_add_backlog(sk, buf))
+ if (sk_add_backlog(sk, buf, rcvbuf_limit(sk, buf)))
res = TIPC_ERR_OVERLOAD;
else
res = TIPC_OK;
@@ -1334,13 +1435,11 @@ static u32 dispatch(struct tipc_port *tport, struct sk_buff *buf)
*
* Called with port lock already taken.
*/
-
static void wakeupdispatch(struct tipc_port *tport)
{
- struct sock *sk = (struct sock *)tport->usr_handle;
+ struct sock *sk = tport->sk;
- if (waitqueue_active(sk_sleep(sk)))
- wake_up_interruptible(sk_sleep(sk));
+ sk->sk_write_space(sk);
}
/**
@@ -1352,106 +1451,94 @@ static void wakeupdispatch(struct tipc_port *tport)
*
* Returns 0 on success, errno otherwise
*/
-
static int connect(struct socket *sock, struct sockaddr *dest, int destlen,
int flags)
{
struct sock *sk = sock->sk;
struct sockaddr_tipc *dst = (struct sockaddr_tipc *)dest;
struct msghdr m = {NULL,};
- struct sk_buff *buf;
- struct tipc_msg *msg;
- long timeout;
+ unsigned int timeout;
int res;
lock_sock(sk);
/* For now, TIPC does not allow use of connect() with DGRAM/RDM types */
-
if (sock->state == SS_READY) {
res = -EOPNOTSUPP;
goto exit;
}
- /* For now, TIPC does not support the non-blocking form of connect() */
-
- if (flags & O_NONBLOCK) {
- res = -EOPNOTSUPP;
- goto exit;
- }
-
- /* Issue Posix-compliant error code if socket is in the wrong state */
-
- if (sock->state == SS_LISTENING) {
- res = -EOPNOTSUPP;
- goto exit;
- }
- if (sock->state == SS_CONNECTING) {
- res = -EALREADY;
- goto exit;
- }
- if (sock->state != SS_UNCONNECTED) {
- res = -EISCONN;
- goto exit;
- }
-
/*
* Reject connection attempt using multicast address
*
* Note: send_msg() validates the rest of the address fields,
* so there's no need to do it here
*/
-
if (dst->addrtype == TIPC_ADDR_MCAST) {
res = -EINVAL;
goto exit;
}
- /* Reject any messages already in receive queue (very unlikely) */
+ timeout = (flags & O_NONBLOCK) ? 0 : tipc_sk(sk)->conn_timeout;
- reject_rx_queue(sk);
+ switch (sock->state) {
+ case SS_UNCONNECTED:
+ /* Send a 'SYN-' to destination */
+ m.msg_name = dest;
+ m.msg_namelen = destlen;
- /* Send a 'SYN-' to destination */
+ /* If connect is in non-blocking case, set MSG_DONTWAIT to
+ * indicate send_msg() is never blocked.
+ */
+ if (!timeout)
+ m.msg_flags = MSG_DONTWAIT;
- m.msg_name = dest;
- m.msg_namelen = destlen;
- res = send_msg(NULL, sock, &m, 0);
- if (res < 0)
- goto exit;
+ res = send_msg(NULL, sock, &m, 0);
+ if ((res < 0) && (res != -EWOULDBLOCK))
+ goto exit;
- /* Wait until an 'ACK' or 'RST' arrives, or a timeout occurs */
+ /* Just entered SS_CONNECTING state; the only
+ * difference is that return value in non-blocking
+ * case is EINPROGRESS, rather than EALREADY.
+ */
+ res = -EINPROGRESS;
+ break;
+ case SS_CONNECTING:
+ res = -EALREADY;
+ break;
+ case SS_CONNECTED:
+ res = -EISCONN;
+ break;
+ default:
+ res = -EINVAL;
+ goto exit;
+ }
- timeout = tipc_sk(sk)->conn_timeout;
- release_sock(sk);
- res = wait_event_interruptible_timeout(*sk_sleep(sk),
- (!skb_queue_empty(&sk->sk_receive_queue) ||
- (sock->state != SS_CONNECTING)),
- timeout ? timeout : MAX_SCHEDULE_TIMEOUT);
- lock_sock(sk);
+ if (sock->state == SS_CONNECTING) {
+ if (!timeout)
+ goto exit;
- if (res > 0) {
- buf = skb_peek(&sk->sk_receive_queue);
- if (buf != NULL) {
- msg = buf_msg(buf);
- res = auto_connect(sock, msg);
- if (!res) {
- if (!msg_data_sz(msg))
- advance_rx_queue(sk);
- }
- } else {
- if (sock->state == SS_CONNECTED)
- res = -EISCONN;
+ /* Wait until an 'ACK' or 'RST' arrives, or a timeout occurs */
+ release_sock(sk);
+ res = wait_event_interruptible_timeout(*sk_sleep(sk),
+ sock->state != SS_CONNECTING,
+ timeout ? (long)msecs_to_jiffies(timeout)
+ : MAX_SCHEDULE_TIMEOUT);
+ lock_sock(sk);
+ if (res <= 0) {
+ if (res == 0)
+ res = -ETIMEDOUT;
else
- res = -ECONNREFUSED;
+ ; /* leave "res" unchanged */
+ goto exit;
}
- } else {
- if (res == 0)
- res = -ETIMEDOUT;
- else
- ; /* leave "res" unchanged */
- sock->state = SS_DISCONNECTING;
}
+ if (unlikely(sock->state == SS_DISCONNECTING))
+ res = sock_error(sk);
+ else
+ res = 0;
+
exit:
release_sock(sk);
return res;
@@ -1464,7 +1551,6 @@ exit:
*
* Returns 0 on success, errno otherwise
*/
-
static int listen(struct socket *sock, int len)
{
struct sock *sk = sock->sk;
@@ -1472,9 +1558,7 @@ static int listen(struct socket *sock, int len)
lock_sock(sk);
- if (sock->state == SS_READY)
- res = -EOPNOTSUPP;
- else if (sock->state != SS_UNCONNECTED)
+ if (sock->state != SS_UNCONNECTED)
res = -EINVAL;
else {
sock->state = SS_LISTENING;
@@ -1493,19 +1577,19 @@ static int listen(struct socket *sock, int len)
*
* Returns 0 on success, errno otherwise
*/
-
static int accept(struct socket *sock, struct socket *new_sock, int flags)
{
- struct sock *sk = sock->sk;
+ struct sock *new_sk, *sk = sock->sk;
struct sk_buff *buf;
+ struct tipc_sock *new_tsock;
+ struct tipc_port *new_tport;
+ struct tipc_msg *msg;
+ u32 new_ref;
+
int res;
lock_sock(sk);
- if (sock->state == SS_READY) {
- res = -EOPNOTSUPP;
- goto exit;
- }
if (sock->state != SS_LISTENING) {
res = -EINVAL;
goto exit;
@@ -1526,52 +1610,53 @@ static int accept(struct socket *sock, struct socket *new_sock, int flags)
buf = skb_peek(&sk->sk_receive_queue);
- res = tipc_create(sock_net(sock->sk), new_sock, 0, 0);
- if (!res) {
- struct sock *new_sk = new_sock->sk;
- struct tipc_sock *new_tsock = tipc_sk(new_sk);
- struct tipc_port *new_tport = new_tsock->p;
- u32 new_ref = new_tport->ref;
- struct tipc_msg *msg = buf_msg(buf);
-
- lock_sock(new_sk);
-
- /*
- * Reject any stray messages received by new socket
- * before the socket lock was taken (very, very unlikely)
- */
-
- reject_rx_queue(new_sk);
-
- /* Connect new socket to it's peer */
+ res = tipc_sk_create(sock_net(sock->sk), new_sock, 0, 1);
+ if (res)
+ goto exit;
- new_tsock->peer_name.ref = msg_origport(msg);
- new_tsock->peer_name.node = msg_orignode(msg);
- tipc_connect2port(new_ref, &new_tsock->peer_name);
- new_sock->state = SS_CONNECTED;
+ new_sk = new_sock->sk;
+ new_tsock = tipc_sk(new_sk);
+ new_tport = new_tsock->p;
+ new_ref = new_tport->ref;
+ msg = buf_msg(buf);
- tipc_set_portimportance(new_ref, msg_importance(msg));
- if (msg_named(msg)) {
- new_tport->conn_type = msg_nametype(msg);
- new_tport->conn_instance = msg_nameinst(msg);
- }
+ /* we lock on new_sk; but lockdep sees the lock on sk */
+ lock_sock_nested(new_sk, SINGLE_DEPTH_NESTING);
- /*
- * Respond to 'SYN-' by discarding it & returning 'ACK'-.
- * Respond to 'SYN+' by queuing it on new socket.
- */
+ /*
+ * Reject any stray messages received by new socket
+ * before the socket lock was taken (very, very unlikely)
+ */
+ reject_rx_queue(new_sk);
+
+ /* Connect new socket to it's peer */
+ new_tsock->peer_name.ref = msg_origport(msg);
+ new_tsock->peer_name.node = msg_orignode(msg);
+ tipc_connect(new_ref, &new_tsock->peer_name);
+ new_sock->state = SS_CONNECTED;
+
+ tipc_set_portimportance(new_ref, msg_importance(msg));
+ if (msg_named(msg)) {
+ new_tport->conn_type = msg_nametype(msg);
+ new_tport->conn_instance = msg_nameinst(msg);
+ }
- if (!msg_data_sz(msg)) {
- struct msghdr m = {NULL,};
+ /*
+ * Respond to 'SYN-' by discarding it & returning 'ACK'-.
+ * Respond to 'SYN+' by queuing it on new socket.
+ */
+ if (!msg_data_sz(msg)) {
+ struct msghdr m = {NULL,};
- advance_rx_queue(sk);
- send_packet(NULL, new_sock, &m, 0);
- } else {
- __skb_dequeue(&sk->sk_receive_queue);
- __skb_queue_head(&new_sk->sk_receive_queue, buf);
- }
- release_sock(new_sk);
+ advance_rx_queue(sk);
+ send_packet(NULL, new_sock, &m, 0);
+ } else {
+ __skb_dequeue(&sk->sk_receive_queue);
+ __skb_queue_head(&new_sk->sk_receive_queue, buf);
+ skb_set_owner_r(buf, new_sk);
}
+ release_sock(new_sk);
+
exit:
release_sock(sk);
return res;
@@ -1586,7 +1671,6 @@ exit:
*
* Returns 0 on success, errno otherwise
*/
-
static int shutdown(struct socket *sock, int how)
{
struct sock *sk = sock->sk;
@@ -1603,13 +1687,12 @@ static int shutdown(struct socket *sock, int how)
case SS_CONNECTING:
case SS_CONNECTED:
- /* Disconnect and send a 'FIN+' or 'FIN-' message to peer */
restart:
+ /* Disconnect and send a 'FIN+' or 'FIN-' message to peer */
buf = __skb_dequeue(&sk->sk_receive_queue);
if (buf) {
- atomic_dec(&tipc_queue_size);
- if (TIPC_SKB_CB(buf)->handle != msg_data(buf_msg(buf))) {
- buf_discard(buf);
+ if (TIPC_SKB_CB(buf)->handle != 0) {
+ kfree_skb(buf);
goto restart;
}
tipc_disconnect(tport->ref);
@@ -1624,11 +1707,11 @@ restart:
case SS_DISCONNECTING:
- /* Discard any unreceived messages; wake up sleeping tasks */
+ /* Discard any unreceived messages */
+ __skb_queue_purge(&sk->sk_receive_queue);
- discard_rx_queue(sk);
- if (waitqueue_active(sk_sleep(sk)))
- wake_up_interruptible(sk_sleep(sk));
+ /* Wake up anyone sleeping in poll */
+ sk->sk_state_change(sk);
res = 0;
break;
@@ -1653,9 +1736,8 @@ restart:
*
* Returns 0 on success, errno otherwise
*/
-
-static int setsockopt(struct socket *sock,
- int lvl, int opt, char __user *ov, unsigned int ol)
+static int setsockopt(struct socket *sock, int lvl, int opt, char __user *ov,
+ unsigned int ol)
{
struct sock *sk = sock->sk;
struct tipc_port *tport = tipc_sk_port(sk);
@@ -1688,7 +1770,7 @@ static int setsockopt(struct socket *sock,
res = tipc_set_portunreturnable(tport->ref, value);
break;
case TIPC_CONN_TIMEOUT:
- tipc_sk(sk)->conn_timeout = msecs_to_jiffies(value);
+ tipc_sk(sk)->conn_timeout = value;
/* no need to set "res", since already 0 at this point */
break;
default:
@@ -1713,9 +1795,8 @@ static int setsockopt(struct socket *sock,
*
* Returns 0 on success, errno otherwise
*/
-
-static int getsockopt(struct socket *sock,
- int lvl, int opt, char __user *ov, int __user *ol)
+static int getsockopt(struct socket *sock, int lvl, int opt, char __user *ov,
+ int __user *ol)
{
struct sock *sk = sock->sk;
struct tipc_port *tport = tipc_sk_port(sk);
@@ -1744,11 +1825,11 @@ static int getsockopt(struct socket *sock,
res = tipc_portunreturnable(tport->ref, &value);
break;
case TIPC_CONN_TIMEOUT:
- value = jiffies_to_msecs(tipc_sk(sk)->conn_timeout);
+ value = tipc_sk(sk)->conn_timeout;
/* no need to set "res", since already 0 at this point */
break;
case TIPC_NODE_RECVQ_DEPTH:
- value = (u32)atomic_read(&tipc_queue_size);
+ value = 0; /* was tipc_queue_size, now obsolete */
break;
case TIPC_SOCK_RECVQ_DEPTH:
value = skb_queue_len(&sk->sk_receive_queue);
@@ -1771,9 +1852,7 @@ static int getsockopt(struct socket *sock,
return put_user(sizeof(value), ol);
}
-/**
- * Protocol switches for the various types of TIPC sockets
- */
+/* Protocol switches for the various types of TIPC sockets */
static const struct proto_ops msg_ops = {
.owner = THIS_MODULE,
@@ -1782,11 +1861,11 @@ static const struct proto_ops msg_ops = {
.bind = bind,
.connect = connect,
.socketpair = sock_no_socketpair,
- .accept = accept,
+ .accept = sock_no_accept,
.getname = get_name,
.poll = poll,
.ioctl = sock_no_ioctl,
- .listen = listen,
+ .listen = sock_no_listen,
.shutdown = shutdown,
.setsockopt = setsockopt,
.getsockopt = getsockopt,
@@ -1841,13 +1920,20 @@ static const struct proto_ops stream_ops = {
static const struct net_proto_family tipc_family_ops = {
.owner = THIS_MODULE,
.family = AF_TIPC,
- .create = tipc_create
+ .create = tipc_sk_create
};
static struct proto tipc_proto = {
.name = "TIPC",
.owner = THIS_MODULE,
- .obj_size = sizeof(struct tipc_sock)
+ .obj_size = sizeof(struct tipc_sock),
+ .sysctl_rmem = sysctl_tipc_rmem
+};
+
+static struct proto tipc_proto_kern = {
+ .name = "TIPC",
+ .obj_size = sizeof(struct tipc_sock),
+ .sysctl_rmem = sysctl_tipc_rmem
};
/**
@@ -1861,13 +1947,13 @@ int tipc_socket_init(void)
res = proto_register(&tipc_proto, 1);
if (res) {
- err("Failed to register TIPC protocol type\n");
+ pr_err("Failed to register TIPC protocol type\n");
goto out;
}
res = sock_register(&tipc_family_ops);
if (res) {
- err("Failed to register TIPC socket type\n");
+ pr_err("Failed to register TIPC socket type\n");
proto_unregister(&tipc_proto);
goto out;
}
@@ -1880,7 +1966,6 @@ int tipc_socket_init(void)
/**
* tipc_socket_stop - stop TIPC socket interface
*/
-
void tipc_socket_stop(void)
{
if (!sockets_enabled)
@@ -1890,4 +1975,3 @@ void tipc_socket_stop(void)
sock_unregister(tipc_family_ops.family);
proto_unregister(&tipc_proto);
}
-
generated by cgit (git 2.34.1) at 2025-08-10 17:33:00 +0000