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https://github.com/adulau/aha.git
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[ECONET]: Convert away from SOCKOPS_WRAPPED
Just use a local econet_mutex instead. Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
David S. Miller
parent
f6c90b71a3
commit
1d1818316f
1 changed files with 85 additions and 55 deletions
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@ -42,6 +42,7 @@
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#include <linux/spinlock.h>
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#include <linux/rcupdate.h>
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#include <linux/bitops.h>
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#include <linux/mutex.h>
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#include <asm/uaccess.h>
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#include <asm/system.h>
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@ -49,6 +50,7 @@
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static const struct proto_ops econet_ops;
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static struct hlist_head econet_sklist;
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static DEFINE_RWLOCK(econet_lock);
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static DEFINE_MUTEX(econet_mutex);
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/* Since there are only 256 possible network numbers (or fewer, depends
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how you count) it makes sense to use a simple lookup table. */
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@ -124,6 +126,8 @@ static int econet_recvmsg(struct kiocb *iocb, struct socket *sock,
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msg->msg_namelen = sizeof(struct sockaddr_ec);
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mutex_lock(&econet_mutex);
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/*
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* Call the generic datagram receiver. This handles all sorts
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* of horrible races and re-entrancy so we can forget about it
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@ -174,6 +178,7 @@ static int econet_recvmsg(struct kiocb *iocb, struct socket *sock,
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out_free:
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skb_free_datagram(sk, skb);
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out:
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mutex_unlock(&econet_mutex);
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return err;
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}
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@ -184,8 +189,8 @@ out:
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static int econet_bind(struct socket *sock, struct sockaddr *uaddr, int addr_len)
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{
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struct sockaddr_ec *sec = (struct sockaddr_ec *)uaddr;
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struct sock *sk=sock->sk;
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struct econet_sock *eo = ec_sk(sk);
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struct sock *sk;
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struct econet_sock *eo;
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/*
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* Check legality
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@ -195,11 +200,18 @@ static int econet_bind(struct socket *sock, struct sockaddr *uaddr, int addr_len
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sec->sec_family != AF_ECONET)
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return -EINVAL;
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mutex_lock(&econet_mutex);
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sk = sock->sk;
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eo = ec_sk(sk);
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eo->cb = sec->cb;
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eo->port = sec->port;
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eo->station = sec->addr.station;
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eo->net = sec->addr.net;
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mutex_unlock(&econet_mutex);
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return 0;
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}
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@ -284,6 +296,8 @@ static int econet_sendmsg(struct kiocb *iocb, struct socket *sock,
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* Get and verify the address.
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*/
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mutex_lock(&econet_mutex);
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if (saddr == NULL) {
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struct econet_sock *eo = ec_sk(sk);
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@ -292,8 +306,10 @@ static int econet_sendmsg(struct kiocb *iocb, struct socket *sock,
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port = eo->port;
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cb = eo->cb;
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} else {
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if (msg->msg_namelen < sizeof(struct sockaddr_ec))
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if (msg->msg_namelen < sizeof(struct sockaddr_ec)) {
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mutex_unlock(&econet_mutex);
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return -EINVAL;
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}
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addr.station = saddr->addr.station;
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addr.net = saddr->addr.net;
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port = saddr->port;
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@ -304,19 +320,21 @@ static int econet_sendmsg(struct kiocb *iocb, struct socket *sock,
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dev = net2dev_map[addr.net];
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/* If not directly reachable, use some default */
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if (dev == NULL)
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{
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if (dev == NULL) {
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dev = net2dev_map[0];
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/* No interfaces at all? */
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if (dev == NULL)
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if (dev == NULL) {
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mutex_unlock(&econet_mutex);
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return -ENETDOWN;
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}
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}
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if (len + 15 > dev->mtu)
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if (len + 15 > dev->mtu) {
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mutex_unlock(&econet_mutex);
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return -EMSGSIZE;
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}
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if (dev->type == ARPHRD_ECONET)
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{
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if (dev->type == ARPHRD_ECONET) {
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/* Real hardware Econet. We're not worthy etc. */
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#ifdef CONFIG_ECONET_NATIVE
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unsigned short proto = 0;
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@ -374,6 +392,7 @@ static int econet_sendmsg(struct kiocb *iocb, struct socket *sock,
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dev_queue_xmit(skb);
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dev_put(dev);
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mutex_unlock(&econet_mutex);
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return(len);
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out_free:
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@ -384,14 +403,18 @@ static int econet_sendmsg(struct kiocb *iocb, struct socket *sock,
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#else
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err = -EPROTOTYPE;
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#endif
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mutex_unlock(&econet_mutex);
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return err;
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}
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#ifdef CONFIG_ECONET_AUNUDP
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/* AUN virtual Econet. */
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if (udpsock == NULL)
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if (udpsock == NULL) {
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mutex_unlock(&econet_mutex);
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return -ENETDOWN; /* No socket - can't send */
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}
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/* Make up a UDP datagram and hand it off to some higher intellect. */
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@ -438,8 +461,10 @@ static int econet_sendmsg(struct kiocb *iocb, struct socket *sock,
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void __user *base = msg->msg_iov[i].iov_base;
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size_t len = msg->msg_iov[i].iov_len;
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/* Check it now since we switch to KERNEL_DS later. */
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if (!access_ok(VERIFY_READ, base, len))
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if (!access_ok(VERIFY_READ, base, len)) {
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mutex_unlock(&econet_mutex);
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return -EFAULT;
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}
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iov[i+1].iov_base = base;
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iov[i+1].iov_len = len;
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size += len;
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@ -447,8 +472,11 @@ static int econet_sendmsg(struct kiocb *iocb, struct socket *sock,
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/* Get a skbuff (no data, just holds our cb information) */
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if ((skb = sock_alloc_send_skb(sk, 0,
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msg->msg_flags & MSG_DONTWAIT, &err)) == NULL)
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msg->msg_flags & MSG_DONTWAIT,
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&err)) == NULL) {
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mutex_unlock(&econet_mutex);
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return err;
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}
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eb = (struct ec_cb *)&skb->cb;
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@ -475,6 +503,8 @@ static int econet_sendmsg(struct kiocb *iocb, struct socket *sock,
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#else
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err = -EPROTOTYPE;
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#endif
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mutex_unlock(&econet_mutex);
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return err;
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}
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@ -485,18 +515,25 @@ static int econet_sendmsg(struct kiocb *iocb, struct socket *sock,
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static int econet_getname(struct socket *sock, struct sockaddr *uaddr,
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int *uaddr_len, int peer)
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{
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struct sock *sk = sock->sk;
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struct econet_sock *eo = ec_sk(sk);
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struct sock *sk;
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struct econet_sock *eo;
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struct sockaddr_ec *sec = (struct sockaddr_ec *)uaddr;
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if (peer)
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return -EOPNOTSUPP;
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mutex_lock(&econet_mutex);
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sk = sock->sk;
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eo = ec_sk(sk);
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sec->sec_family = AF_ECONET;
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sec->port = eo->port;
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sec->addr.station = eo->station;
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sec->addr.net = eo->net;
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mutex_unlock(&econet_mutex);
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*uaddr_len = sizeof(*sec);
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return 0;
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}
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@ -522,10 +559,13 @@ static void econet_destroy_timer(unsigned long data)
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static int econet_release(struct socket *sock)
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{
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struct sock *sk = sock->sk;
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struct sock *sk;
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mutex_lock(&econet_mutex);
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sk = sock->sk;
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if (!sk)
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return 0;
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goto out_unlock;
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econet_remove_socket(&econet_sklist, sk);
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@ -549,10 +589,14 @@ static int econet_release(struct socket *sock)
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sk->sk_timer.expires = jiffies + HZ;
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sk->sk_timer.function = econet_destroy_timer;
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add_timer(&sk->sk_timer);
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return 0;
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goto out_unlock;
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}
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sk_free(sk);
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out_unlock:
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mutex_unlock(&econet_mutex);
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return 0;
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}
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@ -608,6 +652,7 @@ static int ec_dev_ioctl(struct socket *sock, unsigned int cmd, void __user *arg)
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struct ec_device *edev;
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struct net_device *dev;
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struct sockaddr_ec *sec;
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int err;
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/*
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* Fetch the caller's info block into kernel space
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@ -621,38 +666,35 @@ static int ec_dev_ioctl(struct socket *sock, unsigned int cmd, void __user *arg)
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sec = (struct sockaddr_ec *)&ifr.ifr_addr;
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switch (cmd)
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{
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mutex_lock(&econet_mutex);
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err = 0;
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switch (cmd) {
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case SIOCSIFADDR:
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edev = dev->ec_ptr;
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if (edev == NULL)
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{
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if (edev == NULL) {
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/* Magic up a new one. */
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edev = kmalloc(sizeof(struct ec_device), GFP_KERNEL);
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if (edev == NULL) {
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printk("af_ec: memory squeeze.\n");
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dev_put(dev);
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return -ENOMEM;
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err = -ENOMEM;
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break;
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}
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memset(edev, 0, sizeof(struct ec_device));
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dev->ec_ptr = edev;
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}
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else
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} else
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net2dev_map[edev->net] = NULL;
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edev->station = sec->addr.station;
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edev->net = sec->addr.net;
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net2dev_map[sec->addr.net] = dev;
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if (!net2dev_map[0])
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net2dev_map[0] = dev;
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dev_put(dev);
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return 0;
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break;
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case SIOCGIFADDR:
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edev = dev->ec_ptr;
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if (edev == NULL)
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{
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dev_put(dev);
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return -ENODEV;
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if (edev == NULL) {
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err = -ENODEV;
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break;
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}
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memset(sec, 0, sizeof(struct sockaddr_ec));
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sec->addr.station = edev->station;
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@ -660,12 +702,19 @@ static int ec_dev_ioctl(struct socket *sock, unsigned int cmd, void __user *arg)
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sec->sec_family = AF_ECONET;
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dev_put(dev);
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if (copy_to_user(arg, &ifr, sizeof(struct ifreq)))
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return -EFAULT;
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return 0;
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err = -EFAULT;
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break;
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default:
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err = -EINVAL;
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break;
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}
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mutex_unlock(&econet_mutex);
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dev_put(dev);
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return -EINVAL;
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return err;
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}
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/*
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@ -693,26 +742,13 @@ static int econet_ioctl(struct socket *sock, unsigned int cmd, unsigned long arg
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return 0;
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}
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#ifdef CONFIG_COMPAT
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static int econet_compat_ioctl(struct socket *sock, unsigned int cmd, unsigned long arg)
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{
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/*
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* All ioctls provided by econet are standard. There is one gotcha, sockaddr_ec
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* differs between 32bit and 64bit. Fortunately nobody in kernel uses portion
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* of sockaddr which differs between 32bit and 64bit, so we do not need special
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* handling.
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*/
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return -ENOIOCTLCMD;
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}
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#endif
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static struct net_proto_family econet_family_ops = {
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.family = PF_ECONET,
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.create = econet_create,
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.owner = THIS_MODULE,
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};
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static const struct proto_ops SOCKOPS_WRAPPED(econet_ops) = {
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static const struct proto_ops econet_ops = {
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.family = PF_ECONET,
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.owner = THIS_MODULE,
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.release = econet_release,
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@ -723,9 +759,6 @@ static const struct proto_ops SOCKOPS_WRAPPED(econet_ops) = {
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.getname = econet_getname,
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.poll = datagram_poll,
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.ioctl = econet_ioctl,
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#ifdef CONFIG_COMPAT
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.compat_ioctl = econet_compat_ioctl,
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#endif
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.listen = sock_no_listen,
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.shutdown = sock_no_shutdown,
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.setsockopt = sock_no_setsockopt,
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@ -736,9 +769,6 @@ static const struct proto_ops SOCKOPS_WRAPPED(econet_ops) = {
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.sendpage = sock_no_sendpage,
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};
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#include <linux/smp_lock.h>
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SOCKOPS_WRAP(econet, PF_ECONET);
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#if defined(CONFIG_ECONET_AUNUDP) || defined(CONFIG_ECONET_NATIVE)
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/*
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* Find the listening socket, if any, for the given data.
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