/*
* net/tipc/socket.c: TIPC socket API
- *
- * Copyright (c) 2001-2006, Ericsson AB
- * Copyright (c) 2004-2005, Wind River Systems
+ *
+ * Copyright (c) 2001-2007, Ericsson AB
+ * Copyright (c) 2004-2007, Wind River Systems
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
#include <linux/slab.h>
#include <linux/poll.h>
#include <linux/fcntl.h>
-#include <asm/semaphore.h>
+#include <linux/mutex.h>
#include <asm/string.h>
#include <asm/atomic.h>
#include <net/sock.h>
struct tipc_sock {
struct sock sk;
struct tipc_port *p;
- struct semaphore sem;
+ struct mutex lock;
};
#define tipc_sk(sk) ((struct tipc_sock*)sk)
static u32 dispatch(struct tipc_port *tport, struct sk_buff *buf);
static void wakeupdispatch(struct tipc_port *tport);
-static struct proto_ops packet_ops;
-static struct proto_ops stream_ops;
-static struct proto_ops msg_ops;
+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 atomic_t tipc_queue_size = ATOMIC_INIT(0);
-/*
- * sock_lock(): Lock a port/socket pair. lock_sock() can
- * not be used here, since the same lock must protect ports
+/*
+ * sock_lock(): Lock a port/socket pair. lock_sock() can
+ * not be used here, since the same lock must protect ports
* with non-socket interfaces.
* See net.c for description of locking policy.
*/
static void sock_lock(struct tipc_sock* tsock)
{
- spin_lock_bh(tsock->p->lock);
+ spin_lock_bh(tsock->p->lock);
}
-/*
+/*
* sock_unlock(): Unlock a port/socket pair
*/
static void sock_unlock(struct tipc_sock* tsock)
{
- spin_unlock_bh(tsock->p->lock);
+ spin_unlock_bh(tsock->p->lock);
}
/**
* pollmask - determine the current set of poll() events for a socket
* @sock: socket structure
- *
+ *
* TIPC sets the returned events as follows:
* a) POLLRDNORM and POLLIN are set if the socket's receive queue is non-empty
* or if a connection-oriented socket is does not have an active connection
*
* IMPORTANT: The fact that a read or write operation will not block does NOT
* imply that the operation will succeed!
- *
+ *
* Returns pollmask value
*/
else
mask = 0;
- if (sock->state == SS_DISCONNECTING)
+ if (sock->state == SS_DISCONNECTING)
mask |= POLLHUP;
else
mask |= POLLOUT;
static void advance_queue(struct tipc_sock *tsock)
{
- sock_lock(tsock);
+ sock_lock(tsock);
buf_discard(skb_dequeue(&tsock->sk.sk_receive_queue));
- sock_unlock(tsock);
+ sock_unlock(tsock);
atomic_dec(&tipc_queue_size);
}
* tipc_create - create a TIPC socket
* @sock: pre-allocated socket structure
* @protocol: protocol indicator (must be 0)
- *
+ *
* This routine creates and attaches a 'struct sock' to the 'struct socket',
* then create and attaches a TIPC port to the 'struct sock' part.
*
* Returns 0 on success, errno otherwise
*/
-static int tipc_create(struct socket *sock, int protocol)
+static int tipc_create(struct net *net, struct socket *sock, int protocol)
{
struct tipc_sock *tsock;
struct tipc_port *port;
struct sock *sk;
- u32 ref;
+ u32 ref;
+
+ if (net != &init_net)
+ return -EAFNOSUPPORT;
if (unlikely(protocol != 0))
return -EPROTONOSUPPORT;
return -EPROTOTYPE;
}
- sk = sk_alloc(AF_TIPC, GFP_KERNEL, &tipc_proto, 1);
+ sk = sk_alloc(net, AF_TIPC, GFP_KERNEL, &tipc_proto);
if (!sk) {
tipc_deleteport(ref);
return -ENOMEM;
tsock->p = port;
port->usr_handle = tsock;
- init_MUTEX(&tsock->sem);
+ mutex_init(&tsock->lock);
dbg("sock_create: %x\n",tsock);
* For SEQPACKET and STREAM socket types, the first message is rejected
* and any others are discarded. (If the first message on a STREAM socket
* is partially-read, it is discarded and the next one is rejected instead.)
- *
+ *
* NOTE: Rejected messages are not necessarily returned to the sender! They
* are returned or discarded according to the "destination droppable" setting
* specified for the message by the sender.
int res = TIPC_OK;
struct sk_buff *buf;
- dbg("sock_delete: %x\n",tsock);
+ dbg("sock_delete: %x\n",tsock);
if (!tsock)
return 0;
- down_interruptible(&tsock->sem);
+ mutex_lock(&tsock->lock);
if (!sock->sk) {
- up(&tsock->sem);
+ mutex_unlock(&tsock->lock);
return 0;
}
-
+
/* Reject unreceived messages, unless no longer connected */
while (sock->state != SS_DISCONNECTING) {
atomic_dec(&tipc_queue_size);
}
- up(&tsock->sem);
+ mutex_unlock(&tsock->lock);
sock_put(sk);
- atomic_dec(&tipc_user_count);
+ atomic_dec(&tipc_user_count);
return res;
}
* @sock: socket structure
* @uaddr: socket address describing name(s) and desired operation
* @uaddr_len: size of socket address data structure
- *
+ *
* Name and name sequence binding is indicated using a positive scope value;
* a negative scope value unbinds the specified name. Specifying no name
* (i.e. a socket address length of 0) unbinds all names from the socket.
- *
+ *
* Returns 0 on success, errno otherwise
*/
struct sockaddr_tipc *addr = (struct sockaddr_tipc *)uaddr;
int res;
- if (down_interruptible(&tsock->sem))
+ if (mutex_lock_interruptible(&tsock->lock))
return -ERESTARTSYS;
-
+
if (unlikely(!uaddr_len)) {
res = tipc_withdraw(tsock->p->ref, 0, NULL);
goto exit;
res = -EAFNOSUPPORT;
goto exit;
}
-
- if (addr->scope > 0)
+
+ if (addr->scope > 0)
res = tipc_publish(tsock->p->ref, addr->scope,
&addr->addr.nameseq);
else
res = tipc_withdraw(tsock->p->ref, -addr->scope,
&addr->addr.nameseq);
exit:
- up(&tsock->sem);
+ mutex_unlock(&tsock->lock);
return res;
}
-/**
+/**
* get_name - get port ID of socket or peer socket
* @sock: socket structure
* @uaddr: area for returned socket address
* @uaddr_len: area for returned length of socket address
* @peer: 0 to obtain socket name, 1 to obtain peer socket name
- *
+ *
* Returns 0 on success, errno otherwise
*/
-static int get_name(struct socket *sock, struct sockaddr *uaddr,
+static int get_name(struct socket *sock, struct sockaddr *uaddr,
int *uaddr_len, int peer)
{
struct tipc_sock *tsock = tipc_sk(sock->sk);
struct sockaddr_tipc *addr = (struct sockaddr_tipc *)uaddr;
u32 res;
- if (down_interruptible(&tsock->sem))
+ if (mutex_lock_interruptible(&tsock->lock))
return -ERESTARTSYS;
*uaddr_len = sizeof(*addr);
res = tipc_ownidentity(tsock->p->ref, &addr->addr.id);
addr->addr.name.domain = 0;
- up(&tsock->sem);
+ mutex_unlock(&tsock->lock);
return res;
}
* Returns the pollmask
*/
-static unsigned int poll(struct file *file, struct socket *sock,
+static unsigned int poll(struct file *file, struct socket *sock,
poll_table *wait)
{
poll_wait(file, sock->sk->sk_sleep, wait);
return pollmask(sock);
}
-/**
+/**
* dest_name_check - verify user is permitted to send to specified port name
* @dest: destination address
* @m: descriptor for message to be sent
- *
+ *
* Prevents restricted configuration commands from being issued by
* unauthorized users.
- *
+ *
* Returns 0 if permission is granted, otherwise errno
*/
{
struct tipc_cfg_msg_hdr hdr;
- if (likely(dest->addr.name.name.type >= TIPC_RESERVED_TYPES))
- return 0;
- if (likely(dest->addr.name.name.type == TIPC_TOP_SRV))
- return 0;
+ if (likely(dest->addr.name.name.type >= TIPC_RESERVED_TYPES))
+ return 0;
+ if (likely(dest->addr.name.name.type == TIPC_TOP_SRV))
+ return 0;
- if (likely(dest->addr.name.name.type != TIPC_CFG_SRV))
- return -EACCES;
+ if (likely(dest->addr.name.name.type != TIPC_CFG_SRV))
+ return -EACCES;
- if (copy_from_user(&hdr, m->msg_iov[0].iov_base, sizeof(hdr)))
+ 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)))
return -EACCES;
-
+
return 0;
}
* @sock: socket structure
* @m: message to send
* @total_len: length of message
- *
+ *
* Message must have an destination specified explicitly.
- * Used for SOCK_RDM and SOCK_DGRAM messages,
+ * Used for SOCK_RDM and SOCK_DGRAM messages,
* and for 'SYN' messages on SOCK_SEQPACKET and SOCK_STREAM connections.
* (Note: 'SYN+' is prohibited on SOCK_STREAM.)
- *
+ *
* Returns the number of bytes sent on success, or errno otherwise
*/
struct msghdr *m, size_t total_len)
{
struct tipc_sock *tsock = tipc_sk(sock->sk);
- struct sockaddr_tipc *dest = (struct sockaddr_tipc *)m->msg_name;
+ struct sockaddr_tipc *dest = (struct sockaddr_tipc *)m->msg_name;
struct sk_buff *buf;
int needs_conn;
int res = -EINVAL;
if (unlikely(!dest))
return -EDESTADDRREQ;
- if (unlikely(dest->family != AF_TIPC))
+ if (unlikely((m->msg_namelen < sizeof(*dest)) ||
+ (dest->family != AF_TIPC)))
return -EINVAL;
needs_conn = (sock->state != SS_READY);
}
}
- if (down_interruptible(&tsock->sem))
+ if (mutex_lock_interruptible(&tsock->lock))
return -ERESTARTSYS;
if (needs_conn) {
sock->state = SS_CONNECTING;
}
- do {
- if (dest->addrtype == TIPC_ADDR_NAME) {
- if ((res = dest_name_check(dest, m)))
- goto exit;
- res = tipc_send2name(tsock->p->ref,
- &dest->addr.name.name,
- dest->addr.name.domain,
- m->msg_iovlen,
- m->msg_iov);
- }
- else if (dest->addrtype == TIPC_ADDR_ID) {
- res = tipc_send2port(tsock->p->ref,
- &dest->addr.id,
- m->msg_iovlen,
- m->msg_iov);
- }
- else if (dest->addrtype == TIPC_ADDR_MCAST) {
+ do {
+ if (dest->addrtype == TIPC_ADDR_NAME) {
+ if ((res = dest_name_check(dest, m)))
+ goto exit;
+ res = tipc_send2name(tsock->p->ref,
+ &dest->addr.name.name,
+ dest->addr.name.domain,
+ m->msg_iovlen,
+ m->msg_iov);
+ }
+ else if (dest->addrtype == TIPC_ADDR_ID) {
+ res = tipc_send2port(tsock->p->ref,
+ &dest->addr.id,
+ m->msg_iovlen,
+ m->msg_iov);
+ }
+ else if (dest->addrtype == TIPC_ADDR_MCAST) {
if (needs_conn) {
res = -EOPNOTSUPP;
goto exit;
}
- if ((res = dest_name_check(dest, m)))
- goto exit;
- res = tipc_multicast(tsock->p->ref,
- &dest->addr.nameseq,
- 0,
- m->msg_iovlen,
- m->msg_iov);
- }
- if (likely(res != -ELINKCONG)) {
-exit:
- up(&tsock->sem);
- return res;
- }
+ if ((res = dest_name_check(dest, m)))
+ goto exit;
+ res = tipc_multicast(tsock->p->ref,
+ &dest->addr.nameseq,
+ 0,
+ m->msg_iovlen,
+ m->msg_iov);
+ }
+ if (likely(res != -ELINKCONG)) {
+exit:
+ mutex_unlock(&tsock->lock);
+ return res;
+ }
if (m->msg_flags & MSG_DONTWAIT) {
res = -EWOULDBLOCK;
goto exit;
}
- if (wait_event_interruptible(*sock->sk->sk_sleep,
- !tsock->p->congested)) {
- res = -ERESTARTSYS;
- goto exit;
- }
- } while (1);
+ if (wait_event_interruptible(*sock->sk->sk_sleep,
+ !tsock->p->congested)) {
+ res = -ERESTARTSYS;
+ goto exit;
+ }
+ } while (1);
}
-/**
+/**
* send_packet - send a connection-oriented message
* @iocb: (unused)
* @sock: socket structure
* @m: message to send
* @total_len: length of message
- *
+ *
* Used for SOCK_SEQPACKET messages and SOCK_STREAM data.
- *
+ *
* Returns the number of bytes sent on success, or errno otherwise
*/
struct msghdr *m, size_t total_len)
{
struct tipc_sock *tsock = tipc_sk(sock->sk);
- struct sockaddr_tipc *dest = (struct sockaddr_tipc *)m->msg_name;
+ struct sockaddr_tipc *dest = (struct sockaddr_tipc *)m->msg_name;
int res;
/* Handle implied connection establishment */
if (unlikely(dest))
return send_msg(iocb, sock, m, total_len);
- if (down_interruptible(&tsock->sem)) {
+ if (mutex_lock_interruptible(&tsock->lock)) {
return -ERESTARTSYS;
- }
+ }
- do {
+ do {
if (unlikely(sock->state != SS_CONNECTED)) {
if (sock->state == SS_DISCONNECTING)
- res = -EPIPE;
+ res = -EPIPE;
else
res = -ENOTCONN;
goto exit;
}
- res = tipc_send(tsock->p->ref, m->msg_iovlen, m->msg_iov);
- if (likely(res != -ELINKCONG)) {
+ res = tipc_send(tsock->p->ref, m->msg_iovlen, m->msg_iov);
+ if (likely(res != -ELINKCONG)) {
exit:
- up(&tsock->sem);
- return res;
- }
+ mutex_unlock(&tsock->lock);
+ return res;
+ }
if (m->msg_flags & MSG_DONTWAIT) {
res = -EWOULDBLOCK;
goto exit;
}
- if (wait_event_interruptible(*sock->sk->sk_sleep,
- !tsock->p->congested)) {
- res = -ERESTARTSYS;
- goto exit;
- }
- } while (1);
+ if (wait_event_interruptible(*sock->sk->sk_sleep,
+ !tsock->p->congested)) {
+ res = -ERESTARTSYS;
+ goto exit;
+ }
+ } while (1);
}
-/**
+/**
* send_stream - send stream-oriented data
* @iocb: (unused)
* @sock: socket structure
* @m: data to send
* @total_len: total length of data to be sent
- *
+ *
* Used for SOCK_STREAM data.
- *
- * Returns the number of bytes sent on success (or partial success),
+ *
+ * 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)
{
+ struct tipc_port *tport;
struct msghdr my_msg;
struct iovec my_iov;
struct iovec *curr_iov;
int curr_iovlen;
char __user *curr_start;
+ u32 hdr_size;
int curr_left;
int bytes_to_send;
int bytes_sent;
int res;
-
- if (likely(total_len <= TIPC_MAX_USER_MSG_SIZE))
- return send_packet(iocb, sock, m, total_len);
- /* Can only send large data streams if already connected */
+ /* Handle special cases where there is no connection */
+
+ if (unlikely(sock->state != SS_CONNECTED)) {
+ if (sock->state == SS_UNCONNECTED)
+ return send_packet(iocb, sock, m, total_len);
+ else if (sock->state == SS_DISCONNECTING)
+ return -EPIPE;
+ else
+ return -ENOTCONN;
+ }
- if (unlikely(sock->state != SS_CONNECTED)) {
- if (sock->state == SS_DISCONNECTING)
- return -EPIPE;
- else
- return -ENOTCONN;
- }
+ if (unlikely(m->msg_name))
+ return -EISCONN;
- /*
+ /*
* Send each iovec entry using one or more messages
*
- * Note: This algorithm is good for the most likely case
+ * Note: This algorithm is good for the most likely case
* (i.e. one large iovec entry), but could be improved to pass sets
* of small iovec entries into send_packet().
*/
curr_iovlen = m->msg_iovlen;
my_msg.msg_iov = &my_iov;
my_msg.msg_iovlen = 1;
+ my_msg.msg_flags = m->msg_flags;
+ my_msg.msg_name = NULL;
bytes_sent = 0;
+ tport = tipc_sk(sock->sk)->p;
+ hdr_size = msg_hdr_sz(&tport->phdr);
+
while (curr_iovlen--) {
curr_start = curr_iov->iov_base;
curr_left = curr_iov->iov_len;
while (curr_left) {
- bytes_to_send = (curr_left < TIPC_MAX_USER_MSG_SIZE)
- ? curr_left : TIPC_MAX_USER_MSG_SIZE;
+ bytes_to_send = tport->max_pkt - hdr_size;
+ if (bytes_to_send > TIPC_MAX_USER_MSG_SIZE)
+ bytes_to_send = TIPC_MAX_USER_MSG_SIZE;
+ if (curr_left < bytes_to_send)
+ bytes_to_send = curr_left;
my_iov.iov_base = curr_start;
my_iov.iov_len = bytes_to_send;
- if ((res = send_packet(iocb, sock, &my_msg, 0)) < 0) {
- return bytes_sent ? bytes_sent : res;
+ if ((res = send_packet(iocb, sock, &my_msg, 0)) < 0) {
+ if (bytes_sent != 0)
+ res = bytes_sent;
+ return res;
}
curr_left -= bytes_to_send;
curr_start += bytes_to_send;
* @sock: socket structure
* @tsock: TIPC-specific socket structure
* @msg: peer's response message
- *
+ *
* Returns 0 on success, errno otherwise
*/
-static int auto_connect(struct socket *sock, struct tipc_sock *tsock,
+static int auto_connect(struct socket *sock, struct tipc_sock *tsock,
struct tipc_msg *msg)
{
struct tipc_portid peer;
* set_orig_addr - capture sender's address for received message
* @m: descriptor for message info
* @msg: received message header
- *
+ *
* 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;
+ struct sockaddr_tipc *addr = (struct sockaddr_tipc *)m->msg_name;
- if (addr) {
+ if (addr) {
addr->family = AF_TIPC;
addr->addrtype = TIPC_ADDR_ID;
addr->addr.id.ref = msg_origport(msg);
}
/**
- * anc_data_recv - optionally capture ancillary data for received message
+ * anc_data_recv - optionally capture ancillary data for received message
* @m: descriptor for message info
* @msg: received message header
* @tport: TIPC port associated with message
- *
+ *
* Note: Ancillary data is not captured if not requested by receiver.
- *
+ *
* Returns 0 if successful, otherwise errno
*/
if (unlikely(err)) {
anc_data[0] = err;
anc_data[1] = msg_data_sz(msg);
- if ((res = put_cmsg(m, SOL_SOCKET, TIPC_ERRINFO, 8, anc_data)))
+ if ((res = put_cmsg(m, SOL_TIPC, TIPC_ERRINFO, 8, anc_data)))
return res;
if (anc_data[1] &&
- (res = put_cmsg(m, SOL_SOCKET, TIPC_RETDATA, anc_data[1],
+ (res = put_cmsg(m, SOL_TIPC, TIPC_RETDATA, anc_data[1],
msg_data(msg))))
return res;
}
has_name = 0;
}
if (has_name &&
- (res = put_cmsg(m, SOL_SOCKET, TIPC_DESTNAME, 12, anc_data)))
+ (res = put_cmsg(m, SOL_TIPC, TIPC_DESTNAME, 12, anc_data)))
return res;
return 0;
}
-/**
+/**
* recv_msg - receive packet-oriented message
* @iocb: (unused)
* @m: descriptor for message info
* @buf_len: total size of user buffer area
* @flags: receive flags
- *
+ *
* Used for SOCK_DGRAM, SOCK_RDM, and SOCK_SEQPACKET messages.
* If the complete message doesn't fit in user area, truncate it.
*
if (sock->type == SOCK_SEQPACKET) {
if (unlikely(sock->state == SS_UNCONNECTED))
return -ENOTCONN;
- if (unlikely((sock->state == SS_DISCONNECTING) &&
+ if (unlikely((sock->state == SS_DISCONNECTING) &&
(skb_queue_len(&sock->sk->sk_receive_queue) == 0)))
- return -ENOTCONN;
+ return -ENOTCONN;
}
/* Look for a message in receive queue; wait if necessary */
- if (unlikely(down_interruptible(&tsock->sem)))
+ if (unlikely(mutex_lock_interruptible(&tsock->lock)))
return -ERESTARTSYS;
restart:
}
if ((res = wait_event_interruptible(
- *sock->sk->sk_sleep,
+ *sock->sk->sk_sleep,
((q_len = skb_queue_len(&sock->sk->sk_receive_queue)) ||
(sock->state == SS_DISCONNECTING))) )) {
goto exit;
goto exit;
/* Capture message data (if valid) & compute return value (always) */
-
+
if (!err) {
if (unlikely(buf_len < sz)) {
sz = buf_len;
/* Consume received message (optional) */
if (likely(!(flags & MSG_PEEK))) {
- if (unlikely(++tsock->p->conn_unacked >= TIPC_FLOW_CONTROL_WIN))
- tipc_acknowledge(tsock->p->ref, tsock->p->conn_unacked);
+ if (unlikely(++tsock->p->conn_unacked >= TIPC_FLOW_CONTROL_WIN))
+ tipc_acknowledge(tsock->p->ref, tsock->p->conn_unacked);
advance_queue(tsock);
- }
+ }
exit:
- up(&tsock->sem);
+ mutex_unlock(&tsock->lock);
return res;
}
-/**
+/**
* recv_stream - receive stream-oriented data
* @iocb: (unused)
* @m: descriptor for message info
* @buf_len: total size of user buffer area
* @flags: receive flags
- *
- * Used for SOCK_STREAM messages only. If not enough data is available
+ *
+ * Used for SOCK_STREAM messages only. If not enough data is available
* will optionally wait for more; never truncates data.
*
* Returns size of returned message data, errno otherwise
int sz_to_copy;
int sz_copied = 0;
int needed;
- char *crs = m->msg_iov->iov_base;
+ char __user *crs = m->msg_iov->iov_base;
unsigned char *buf_crs;
u32 err;
int res;
/* Look for a message in receive queue; wait if necessary */
- if (unlikely(down_interruptible(&tsock->sem)))
+ if (unlikely(mutex_lock_interruptible(&tsock->lock)))
return -ERESTARTSYS;
restart:
if (unlikely((skb_queue_len(&sock->sk->sk_receive_queue) == 0) &&
(flags & MSG_DONTWAIT))) {
- res = (sz_copied == 0) ? -EWOULDBLOCK : 0;
+ res = -EWOULDBLOCK;
goto exit;
}
if ((res = wait_event_interruptible(
- *sock->sk->sk_sleep,
+ *sock->sk->sk_sleep,
((q_len = skb_queue_len(&sock->sk->sk_receive_queue)) ||
(sock->state == SS_DISCONNECTING))) )) {
goto exit;
}
/* Capture message data (if valid) & compute return value (always) */
-
+
if (!err) {
buf_crs = (unsigned char *)(TIPC_SKB_CB(buf)->handle);
- sz = buf->tail - buf_crs;
+ sz = skb_tail_pointer(buf) - buf_crs;
needed = (buf_len - sz_copied);
sz_to_copy = (sz <= needed) ? sz : needed;
/* Consume received message (optional) */
if (likely(!(flags & MSG_PEEK))) {
- if (unlikely(++tsock->p->conn_unacked >= TIPC_FLOW_CONTROL_WIN))
- tipc_acknowledge(tsock->p->ref, tsock->p->conn_unacked);
+ if (unlikely(++tsock->p->conn_unacked >= TIPC_FLOW_CONTROL_WIN))
+ tipc_acknowledge(tsock->p->ref, tsock->p->conn_unacked);
advance_queue(tsock);
- }
+ }
/* Loop around if more data is required */
- if ((sz_copied < buf_len) /* didn't get all requested data */
+ if ((sz_copied < buf_len) /* didn't get all requested data */
&& (flags & MSG_WAITALL) /* ... and need to wait for more */
&& (!(flags & MSG_PEEK)) /* ... and aren't just peeking at data */
&& (!err) /* ... and haven't reached a FIN */
goto restart;
exit:
- up(&tsock->sem);
- return res ? res : sz_copied;
+ mutex_unlock(&tsock->lock);
+ return sz_copied ? sz_copied : res;
}
/**
* @queue_size: current size of queue
* @base: nominal maximum size of queue
* @msg: message to be added to queue
- *
+ *
* Returns 1 if queue is currently overloaded, 0 otherwise
*/
return (queue_size > threshold);
}
-/**
+/**
* async_disconnect - wrapper function used to disconnect port
* @portref: TIPC port reference (passed as pointer-sized value)
*/
tipc_disconnect((u32)portref);
}
-/**
+/**
* dispatch - handle arriving message
* @tport: TIPC port that received message
* @buf: message
- *
+ *
* Called with port locked. Must not take socket lock to avoid deadlock risk.
- *
+ *
* Returns TIPC error status code (TIPC_OK if message is not to be rejected)
*/
msg_dbg(msg, "dispatch filter 4\n");
return TIPC_ERR_NO_PORT;
}
- }
+ }
else if (sock->state == SS_LISTENING) {
if (msg_connected(msg) || msg_errcode(msg)) {
msg_dbg(msg, "dispatch filter 5\n");
return TIPC_ERR_NO_PORT;
}
- }
+ }
else if (sock->state == SS_DISCONNECTING) {
msg_dbg(msg, "dispatch filter 6\n");
return TIPC_ERR_NO_PORT;
/* Reject message if there isn't room to queue it */
- if (unlikely((u32)atomic_read(&tipc_queue_size) >
+ if (unlikely((u32)atomic_read(&tipc_queue_size) >
OVERLOAD_LIMIT_BASE)) {
- if (queue_overloaded(atomic_read(&tipc_queue_size),
+ if (queue_overloaded(atomic_read(&tipc_queue_size),
OVERLOAD_LIMIT_BASE, msg))
return TIPC_ERR_OVERLOAD;
- }
+ }
recv_q_len = skb_queue_len(&tsock->sk.sk_receive_queue);
if (unlikely(recv_q_len > (OVERLOAD_LIMIT_BASE / 2))) {
- if (queue_overloaded(recv_q_len,
- OVERLOAD_LIMIT_BASE / 2, msg))
+ if (queue_overloaded(recv_q_len,
+ OVERLOAD_LIMIT_BASE / 2, msg))
return TIPC_ERR_OVERLOAD;
- }
+ }
/* Initiate connection termination for an incoming 'FIN' */
atomic_inc(&tipc_queue_size);
skb_queue_tail(&sock->sk->sk_receive_queue, buf);
- wake_up_interruptible(sock->sk->sk_sleep);
+ if (waitqueue_active(sock->sk->sk_sleep))
+ wake_up_interruptible(sock->sk->sk_sleep);
return TIPC_OK;
}
-/**
+/**
* wakeupdispatch - wake up port after congestion
* @tport: port to wakeup
- *
+ *
* Called with port lock on.
*/
{
struct tipc_sock *tsock = (struct tipc_sock *)tport->usr_handle;
- wake_up_interruptible(tsock->sk.sk_sleep);
+ if (waitqueue_active(tsock->sk.sk_sleep))
+ wake_up_interruptible(tsock->sk.sk_sleep);
}
/**
* Returns 0 on success, errno otherwise
*/
-static int connect(struct socket *sock, struct sockaddr *dest, int destlen,
+static int connect(struct socket *sock, struct sockaddr *dest, int destlen,
int flags)
{
struct tipc_sock *tsock = tipc_sk(sock->sk);
if (sock->state == SS_READY)
return -EOPNOTSUPP;
- /* MOVE THE REST OF THIS ERROR CHECKING TO send_msg()? */
+ /* Issue Posix-compliant error code if socket is in the wrong state */
+
if (sock->state == SS_LISTENING)
return -EOPNOTSUPP;
if (sock->state == SS_CONNECTING)
return -EALREADY;
if (sock->state != SS_UNCONNECTED)
- return -EISCONN;
+ return -EISCONN;
- if ((destlen < sizeof(*dst)) || (dst->family != AF_TIPC) ||
- ((dst->addrtype != TIPC_ADDR_NAME) && (dst->addrtype != TIPC_ADDR_ID)))
- return -EINVAL;
+ /*
+ * 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)
+ return -EINVAL;
/* Send a 'SYN-' to destination */
m.msg_name = dest;
+ m.msg_namelen = destlen;
if ((res = send_msg(NULL, sock, &m, 0)) < 0) {
sock->state = SS_DISCONNECTING;
return res;
}
- if (down_interruptible(&tsock->sem))
- return -ERESTARTSYS;
-
+ if (mutex_lock_interruptible(&tsock->lock))
+ return -ERESTARTSYS;
+
/* Wait for destination's 'ACK' response */
res = wait_event_interruptible_timeout(*sock->sk->sk_sleep,
- skb_queue_len(&sock->sk->sk_receive_queue),
+ skb_queue_len(&sock->sk->sk_receive_queue),
sock->sk->sk_rcvtimeo);
buf = skb_peek(&sock->sk->sk_receive_queue);
if (res > 0) {
msg = buf_msg(buf);
- res = auto_connect(sock, tsock, msg);
- if (!res) {
+ res = auto_connect(sock, tsock, msg);
+ if (!res) {
if (!msg_data_sz(msg))
advance_queue(tsock);
}
if (res == 0) {
res = -ETIMEDOUT;
} else
- { /* leave "res" unchanged */ }
+ { /* leave "res" unchanged */ }
sock->state = SS_DISCONNECTING;
}
- up(&tsock->sem);
+ mutex_unlock(&tsock->lock);
return res;
}
-/**
+/**
* listen - allow socket to listen for incoming connections
* @sock: socket structure
* @len: (unused)
- *
+ *
* Returns 0 on success, errno otherwise
*/
if (sock->state != SS_UNCONNECTED)
return -EINVAL;
sock->state = SS_LISTENING;
- return 0;
+ return 0;
}
-/**
+/**
* accept - wait for connection request
* @sock: listening socket
* @newsock: new socket that is to be connected
* @flags: file-related flags associated with socket
- *
+ *
* Returns 0 on success, errno otherwise
*/
return -EOPNOTSUPP;
if (sock->state != SS_LISTENING)
return -EINVAL;
-
- if (unlikely((skb_queue_len(&sock->sk->sk_receive_queue) == 0) &&
+
+ if (unlikely((skb_queue_len(&sock->sk->sk_receive_queue) == 0) &&
(flags & O_NONBLOCK)))
return -EWOULDBLOCK;
- if (down_interruptible(&tsock->sem))
+ if (mutex_lock_interruptible(&tsock->lock))
return -ERESTARTSYS;
- if (wait_event_interruptible(*sock->sk->sk_sleep,
+ if (wait_event_interruptible(*sock->sk->sk_sleep,
skb_queue_len(&sock->sk->sk_receive_queue))) {
res = -ERESTARTSYS;
goto exit;
}
buf = skb_peek(&sock->sk->sk_receive_queue);
- res = tipc_create(newsock, 0);
+ res = tipc_create(sock->sk->sk_net, newsock, 0);
if (!res) {
struct tipc_sock *new_tsock = tipc_sk(newsock->sk);
struct tipc_portid id;
new_tsock->p->conn_instance = msg_nameinst(msg);
}
- /*
+ /*
* Respond to 'SYN-' by discarding it & returning 'ACK'-.
* Respond to 'SYN+' by queuing it on new socket.
*/
msg_dbg(msg,"<ACC<: ");
- if (!msg_data_sz(msg)) {
- struct msghdr m = {NULL,};
+ if (!msg_data_sz(msg)) {
+ struct msghdr m = {NULL,};
- send_packet(NULL, newsock, &m, 0);
- advance_queue(tsock);
- } else {
+ send_packet(NULL, newsock, &m, 0);
+ advance_queue(tsock);
+ } else {
sock_lock(tsock);
skb_dequeue(&sock->sk->sk_receive_queue);
sock_unlock(tsock);
}
}
exit:
- up(&tsock->sem);
+ mutex_unlock(&tsock->lock);
return res;
}
/**
* shutdown - shutdown socket connection
* @sock: socket structure
- * @how: direction to close (unused; always treated as read + write)
+ * @how: direction to close (must be SHUT_RDWR)
*
* Terminates connection (if necessary), then purges socket's receive queue.
- *
+ *
* Returns 0 on success, errno otherwise
*/
struct sk_buff *buf;
int res;
- /* Could return -EINVAL for an invalid "how", but why bother? */
+ if (how != SHUT_RDWR)
+ return -EINVAL;
- if (down_interruptible(&tsock->sem))
+ if (mutex_lock_interruptible(&tsock->lock))
return -ERESTARTSYS;
sock_lock(tsock);
sock_unlock(tsock);
- up(&tsock->sem);
+ mutex_unlock(&tsock->lock);
return res;
}
* @opt: option identifier
* @ov: pointer to new option value
* @ol: length of option value
- *
- * For stream sockets only, accepts and ignores all IPPROTO_TCP options
+ *
+ * For stream sockets only, accepts and ignores all IPPROTO_TCP options
* (to ease compatibility).
- *
+ *
* Returns 0 on success, errno otherwise
*/
-static int setsockopt(struct socket *sock,
+static int setsockopt(struct socket *sock,
int lvl, int opt, char __user *ov, int ol)
{
struct tipc_sock *tsock = tipc_sk(sock->sk);
u32 value;
int res;
- if ((lvl == IPPROTO_TCP) && (sock->type == SOCK_STREAM))
- return 0;
+ if ((lvl == IPPROTO_TCP) && (sock->type == SOCK_STREAM))
+ return 0;
if (lvl != SOL_TIPC)
return -ENOPROTOOPT;
if (ol < sizeof(value))
return -EINVAL;
- if ((res = get_user(value, (u32 *)ov)))
+ if ((res = get_user(value, (u32 __user *)ov)))
return res;
- if (down_interruptible(&tsock->sem))
+ if (mutex_lock_interruptible(&tsock->lock))
return -ERESTARTSYS;
-
+
switch (opt) {
case TIPC_IMPORTANCE:
res = tipc_set_portimportance(tsock->p->ref, value);
case TIPC_SRC_DROPPABLE:
if (sock->type != SOCK_STREAM)
res = tipc_set_portunreliable(tsock->p->ref, value);
- else
+ else
res = -ENOPROTOOPT;
break;
case TIPC_DEST_DROPPABLE:
res = -EINVAL;
}
- up(&tsock->sem);
+ mutex_unlock(&tsock->lock);
return res;
}
* @opt: option identifier
* @ov: receptacle for option value
* @ol: receptacle for length of option value
- *
- * For stream sockets only, returns 0 length result for all IPPROTO_TCP options
+ *
+ * For stream sockets only, returns 0 length result for all IPPROTO_TCP options
* (to ease compatibility).
- *
+ *
* Returns 0 on success, errno otherwise
*/
-static int getsockopt(struct socket *sock,
- int lvl, int opt, char __user *ov, int *ol)
+static int getsockopt(struct socket *sock,
+ int lvl, int opt, char __user *ov, int __user *ol)
{
struct tipc_sock *tsock = tipc_sk(sock->sk);
- int len;
+ int len;
u32 value;
- int res;
+ int res;
- if ((lvl == IPPROTO_TCP) && (sock->type == SOCK_STREAM))
- return put_user(0, ol);
+ if ((lvl == IPPROTO_TCP) && (sock->type == SOCK_STREAM))
+ return put_user(0, ol);
if (lvl != SOL_TIPC)
return -ENOPROTOOPT;
- if ((res = get_user(len, ol)))
- return res;
+ if ((res = get_user(len, ol)))
+ return res;
- if (down_interruptible(&tsock->sem))
+ if (mutex_lock_interruptible(&tsock->lock))
return -ERESTARTSYS;
switch (opt) {
res = put_user(sizeof(value), ol);
}
- up(&tsock->sem);
+ mutex_unlock(&tsock->lock);
return res;
}
/**
- * Placeholders for non-implemented functionality
- *
- * Returns error code (POSIX-compliant where defined)
- */
-
-static int ioctl(struct socket *s, u32 cmd, unsigned long arg)
-{
- return -EINVAL;
-}
-
-static int no_mmap(struct file *file, struct socket *sock,
- struct vm_area_struct *vma)
-{
- return -EINVAL;
-}
-static ssize_t no_sendpage(struct socket *sock, struct page *page,
- int offset, size_t size, int flags)
-{
- return -EINVAL;
-}
-
-static int no_skpair(struct socket *s1, struct socket *s2)
-{
- return -EOPNOTSUPP;
-}
-
-/**
* Protocol switches for the various types of TIPC sockets
*/
-static struct proto_ops msg_ops = {
+static const struct proto_ops msg_ops = {
.owner = THIS_MODULE,
.family = AF_TIPC,
.release = release,
.bind = bind,
.connect = connect,
- .socketpair = no_skpair,
+ .socketpair = sock_no_socketpair,
.accept = accept,
.getname = get_name,
.poll = poll,
- .ioctl = ioctl,
+ .ioctl = sock_no_ioctl,
.listen = listen,
.shutdown = shutdown,
.setsockopt = setsockopt,
.getsockopt = getsockopt,
.sendmsg = send_msg,
.recvmsg = recv_msg,
- .mmap = no_mmap,
- .sendpage = no_sendpage
+ .mmap = sock_no_mmap,
+ .sendpage = sock_no_sendpage
};
-static struct proto_ops packet_ops = {
+static const struct proto_ops packet_ops = {
.owner = THIS_MODULE,
.family = AF_TIPC,
.release = release,
.bind = bind,
.connect = connect,
- .socketpair = no_skpair,
+ .socketpair = sock_no_socketpair,
.accept = accept,
.getname = get_name,
.poll = poll,
- .ioctl = ioctl,
+ .ioctl = sock_no_ioctl,
.listen = listen,
.shutdown = shutdown,
.setsockopt = setsockopt,
.getsockopt = getsockopt,
.sendmsg = send_packet,
.recvmsg = recv_msg,
- .mmap = no_mmap,
- .sendpage = no_sendpage
+ .mmap = sock_no_mmap,
+ .sendpage = sock_no_sendpage
};
-static struct proto_ops stream_ops = {
+static const struct proto_ops stream_ops = {
.owner = THIS_MODULE,
.family = AF_TIPC,
.release = release,
.bind = bind,
.connect = connect,
- .socketpair = no_skpair,
+ .socketpair = sock_no_socketpair,
.accept = accept,
.getname = get_name,
.poll = poll,
- .ioctl = ioctl,
+ .ioctl = sock_no_ioctl,
.listen = listen,
.shutdown = shutdown,
.setsockopt = setsockopt,
.getsockopt = getsockopt,
.sendmsg = send_stream,
.recvmsg = recv_stream,
- .mmap = no_mmap,
- .sendpage = no_sendpage
+ .mmap = sock_no_mmap,
+ .sendpage = sock_no_sendpage
};
-static struct net_proto_family tipc_family_ops = {
+static const struct net_proto_family tipc_family_ops = {
.owner = THIS_MODULE,
.family = AF_TIPC,
.create = tipc_create
/**
* tipc_socket_init - initialize TIPC socket interface
- *
+ *
* Returns 0 on success, errno otherwise
*/
int tipc_socket_init(void)
{
int res;
- res = proto_register(&tipc_proto, 1);
+ res = proto_register(&tipc_proto, 1);
if (res) {
err("Failed to register TIPC protocol type\n");
goto out;
git://ftp.safe.ca / safe / jmp / linux-2.6 / blobdiff