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-rw-r--r--net/econet/af_econet.c140
1 files changed, 85 insertions, 55 deletions
diff --git a/net/econet/af_econet.c b/net/econet/af_econet.c
index 0c4c83b..8682656 100644
--- a/net/econet/af_econet.c
+++ b/net/econet/af_econet.c
@@ -42,6 +42,7 @@
#include <linux/spinlock.h>
#include <linux/rcupdate.h>
#include <linux/bitops.h>
+#include <linux/mutex.h>
#include <asm/uaccess.h>
#include <asm/system.h>
@@ -49,6 +50,7 @@
static const struct proto_ops econet_ops;
static struct hlist_head econet_sklist;
static DEFINE_RWLOCK(econet_lock);
+static DEFINE_MUTEX(econet_mutex);
/* Since there are only 256 possible network numbers (or fewer, depends
how you count) it makes sense to use a simple lookup table. */
@@ -124,6 +126,8 @@ static int econet_recvmsg(struct kiocb *iocb, struct socket *sock,
msg->msg_namelen = sizeof(struct sockaddr_ec);
+ mutex_lock(&econet_mutex);
+
/*
* Call the generic datagram receiver. This handles all sorts
* of horrible races and re-entrancy so we can forget about it
@@ -174,6 +178,7 @@ static int econet_recvmsg(struct kiocb *iocb, struct socket *sock,
out_free:
skb_free_datagram(sk, skb);
out:
+ mutex_unlock(&econet_mutex);
return err;
}
@@ -184,8 +189,8 @@ out:
static int econet_bind(struct socket *sock, struct sockaddr *uaddr, int addr_len)
{
struct sockaddr_ec *sec = (struct sockaddr_ec *)uaddr;
- struct sock *sk=sock->sk;
- struct econet_sock *eo = ec_sk(sk);
+ struct sock *sk;
+ struct econet_sock *eo;
/*
* Check legality
@@ -195,11 +200,18 @@ static int econet_bind(struct socket *sock, struct sockaddr *uaddr, int addr_len
sec->sec_family != AF_ECONET)
return -EINVAL;
+ mutex_lock(&econet_mutex);
+
+ sk = sock->sk;
+ eo = ec_sk(sk);
+
eo->cb = sec->cb;
eo->port = sec->port;
eo->station = sec->addr.station;
eo->net = sec->addr.net;
+ mutex_unlock(&econet_mutex);
+
return 0;
}
@@ -284,6 +296,8 @@ static int econet_sendmsg(struct kiocb *iocb, struct socket *sock,
* Get and verify the address.
*/
+ mutex_lock(&econet_mutex);
+
if (saddr == NULL) {
struct econet_sock *eo = ec_sk(sk);
@@ -292,8 +306,10 @@ static int econet_sendmsg(struct kiocb *iocb, struct socket *sock,
port = eo->port;
cb = eo->cb;
} else {
- if (msg->msg_namelen < sizeof(struct sockaddr_ec))
+ if (msg->msg_namelen < sizeof(struct sockaddr_ec)) {
+ mutex_unlock(&econet_mutex);
return -EINVAL;
+ }
addr.station = saddr->addr.station;
addr.net = saddr->addr.net;
port = saddr->port;
@@ -304,19 +320,21 @@ static int econet_sendmsg(struct kiocb *iocb, struct socket *sock,
dev = net2dev_map[addr.net];
/* If not directly reachable, use some default */
- if (dev == NULL)
- {
+ if (dev == NULL) {
dev = net2dev_map[0];
/* No interfaces at all? */
- if (dev == NULL)
+ if (dev == NULL) {
+ mutex_unlock(&econet_mutex);
return -ENETDOWN;
+ }
}
- if (len + 15 > dev->mtu)
+ if (len + 15 > dev->mtu) {
+ mutex_unlock(&econet_mutex);
return -EMSGSIZE;
+ }
- if (dev->type == ARPHRD_ECONET)
- {
+ if (dev->type == ARPHRD_ECONET) {
/* Real hardware Econet. We're not worthy etc. */
#ifdef CONFIG_ECONET_NATIVE
unsigned short proto = 0;
@@ -374,6 +392,7 @@ static int econet_sendmsg(struct kiocb *iocb, struct socket *sock,
dev_queue_xmit(skb);
dev_put(dev);
+ mutex_unlock(&econet_mutex);
return(len);
out_free:
@@ -384,14 +403,18 @@ static int econet_sendmsg(struct kiocb *iocb, struct socket *sock,
#else
err = -EPROTOTYPE;
#endif
+ mutex_unlock(&econet_mutex);
+
return err;
}
#ifdef CONFIG_ECONET_AUNUDP
/* AUN virtual Econet. */
- if (udpsock == NULL)
+ if (udpsock == NULL) {
+ mutex_unlock(&econet_mutex);
return -ENETDOWN; /* No socket - can't send */
+ }
/* Make up a UDP datagram and hand it off to some higher intellect. */
@@ -438,8 +461,10 @@ static int econet_sendmsg(struct kiocb *iocb, struct socket *sock,
void __user *base = msg->msg_iov[i].iov_base;
size_t len = msg->msg_iov[i].iov_len;
/* Check it now since we switch to KERNEL_DS later. */
- if (!access_ok(VERIFY_READ, base, len))
+ if (!access_ok(VERIFY_READ, base, len)) {
+ mutex_unlock(&econet_mutex);
return -EFAULT;
+ }
iov[i+1].iov_base = base;
iov[i+1].iov_len = len;
size += len;
@@ -447,8 +472,11 @@ static int econet_sendmsg(struct kiocb *iocb, struct socket *sock,
/* Get a skbuff (no data, just holds our cb information) */
if ((skb = sock_alloc_send_skb(sk, 0,
- msg->msg_flags & MSG_DONTWAIT, &err)) == NULL)
+ msg->msg_flags & MSG_DONTWAIT,
+ &err)) == NULL) {
+ mutex_unlock(&econet_mutex);
return err;
+ }
eb = (struct ec_cb *)&skb->cb;
@@ -475,6 +503,8 @@ static int econet_sendmsg(struct kiocb *iocb, struct socket *sock,
#else
err = -EPROTOTYPE;
#endif
+ mutex_unlock(&econet_mutex);
+
return err;
}
@@ -485,18 +515,25 @@ static int econet_sendmsg(struct kiocb *iocb, struct socket *sock,
static int econet_getname(struct socket *sock, struct sockaddr *uaddr,
int *uaddr_len, int peer)
{
- struct sock *sk = sock->sk;
- struct econet_sock *eo = ec_sk(sk);
+ struct sock *sk;
+ struct econet_sock *eo;
struct sockaddr_ec *sec = (struct sockaddr_ec *)uaddr;
if (peer)
return -EOPNOTSUPP;
+ mutex_lock(&econet_mutex);
+
+ sk = sock->sk;
+ eo = ec_sk(sk);
+
sec->sec_family = AF_ECONET;
sec->port = eo->port;
sec->addr.station = eo->station;
sec->addr.net = eo->net;
+ mutex_unlock(&econet_mutex);
+
*uaddr_len = sizeof(*sec);
return 0;
}
@@ -522,10 +559,13 @@ static void econet_destroy_timer(unsigned long data)
static int econet_release(struct socket *sock)
{
- struct sock *sk = sock->sk;
+ struct sock *sk;
+ mutex_lock(&econet_mutex);
+
+ sk = sock->sk;
if (!sk)
- return 0;
+ goto out_unlock;
econet_remove_socket(&econet_sklist, sk);
@@ -549,10 +589,14 @@ static int econet_release(struct socket *sock)
sk->sk_timer.expires = jiffies + HZ;
sk->sk_timer.function = econet_destroy_timer;
add_timer(&sk->sk_timer);
- return 0;
+
+ goto out_unlock;
}
sk_free(sk);
+
+out_unlock:
+ mutex_unlock(&econet_mutex);
return 0;
}
@@ -608,6 +652,7 @@ static int ec_dev_ioctl(struct socket *sock, unsigned int cmd, void __user *arg)
struct ec_device *edev;
struct net_device *dev;
struct sockaddr_ec *sec;
+ int err;
/*
* Fetch the caller's info block into kernel space
@@ -621,38 +666,35 @@ static int ec_dev_ioctl(struct socket *sock, unsigned int cmd, void __user *arg)
sec = (struct sockaddr_ec *)&ifr.ifr_addr;
- switch (cmd)
- {
+ mutex_lock(&econet_mutex);
+
+ err = 0;
+ switch (cmd) {
case SIOCSIFADDR:
edev = dev->ec_ptr;
- if (edev == NULL)
- {
+ if (edev == NULL) {
/* Magic up a new one. */
edev = kmalloc(sizeof(struct ec_device), GFP_KERNEL);
if (edev == NULL) {
- printk("af_ec: memory squeeze.\n");
- dev_put(dev);
- return -ENOMEM;
+ err = -ENOMEM;
+ break;
}
memset(edev, 0, sizeof(struct ec_device));
dev->ec_ptr = edev;
- }
- else
+ } else
net2dev_map[edev->net] = NULL;
edev->station = sec->addr.station;
edev->net = sec->addr.net;
net2dev_map[sec->addr.net] = dev;
if (!net2dev_map[0])
net2dev_map[0] = dev;
- dev_put(dev);
- return 0;
+ break;
case SIOCGIFADDR:
edev = dev->ec_ptr;
- if (edev == NULL)
- {
- dev_put(dev);
- return -ENODEV;
+ if (edev == NULL) {
+ err = -ENODEV;
+ break;
}
memset(sec, 0, sizeof(struct sockaddr_ec));
sec->addr.station = edev->station;
@@ -660,12 +702,19 @@ static int ec_dev_ioctl(struct socket *sock, unsigned int cmd, void __user *arg)
sec->sec_family = AF_ECONET;
dev_put(dev);
if (copy_to_user(arg, &ifr, sizeof(struct ifreq)))
- return -EFAULT;
- return 0;
+ err = -EFAULT;
+ break;
+
+ default:
+ err = -EINVAL;
+ break;
}
+ mutex_unlock(&econet_mutex);
+
dev_put(dev);
- return -EINVAL;
+
+ return err;
}
/*
@@ -693,26 +742,13 @@ static int econet_ioctl(struct socket *sock, unsigned int cmd, unsigned long arg
return 0;
}
-#ifdef CONFIG_COMPAT
-static int econet_compat_ioctl(struct socket *sock, unsigned int cmd, unsigned long arg)
-{
- /*
- * All ioctls provided by econet are standard. There is one gotcha, sockaddr_ec
- * differs between 32bit and 64bit. Fortunately nobody in kernel uses portion
- * of sockaddr which differs between 32bit and 64bit, so we do not need special
- * handling.
- */
- return -ENOIOCTLCMD;
-}
-#endif
-
static struct net_proto_family econet_family_ops = {
.family = PF_ECONET,
.create = econet_create,
.owner = THIS_MODULE,
};
-static const struct proto_ops SOCKOPS_WRAPPED(econet_ops) = {
+static const struct proto_ops econet_ops = {
.family = PF_ECONET,
.owner = THIS_MODULE,
.release = econet_release,
@@ -723,9 +759,6 @@ static const struct proto_ops SOCKOPS_WRAPPED(econet_ops) = {
.getname = econet_getname,
.poll = datagram_poll,
.ioctl = econet_ioctl,
-#ifdef CONFIG_COMPAT
- .compat_ioctl = econet_compat_ioctl,
-#endif
.listen = sock_no_listen,
.shutdown = sock_no_shutdown,
.setsockopt = sock_no_setsockopt,
@@ -736,9 +769,6 @@ static const struct proto_ops SOCKOPS_WRAPPED(econet_ops) = {
.sendpage = sock_no_sendpage,
};
-#include <linux/smp_lock.h>
-SOCKOPS_WRAP(econet, PF_ECONET);
-
#if defined(CONFIG_ECONET_AUNUDP) || defined(CONFIG_ECONET_NATIVE)
/*
* Find the listening socket, if any, for the given data.
generated by cgit v1.1 at 2024-12-26 12:50:06 +0000