net/ipx: push down BKL into a ipx_dgram_ops
Making the BKL usage explicit in ipx makes it more obvious where it is used, reduces code size and helps getting rid of the BKL in common code. I did not analyse how to kill lock_kernel from ipx entirely, this will involve either proving that it's not needed, or replacing with a proper mutex or spinlock, after finding out which data structures are protected by the lock. Cc: Arnaldo Carvalho de Melo <acme@ghostprotocols.net> Cc: David S. Miller <davem@davemloft.net> Cc: Stephen Hemminger <shemminger@vyatta.com> Cc: netdev@vger.kernel.org Signed-off-by: Arnd Bergmann <arnd@arndb.de> Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Arnd Bergmann
David S. Miller
Родитель
ecced8ba87
Коммит
83927ba069
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@ -1298,6 +1298,7 @@ static int ipx_setsockopt(struct socket *sock, int level, int optname,
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int opt;
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int rc = -EINVAL;
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lock_kernel();
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if (optlen != sizeof(int))
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goto out;
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@ -1312,6 +1313,7 @@ static int ipx_setsockopt(struct socket *sock, int level, int optname,
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ipx_sk(sk)->type = opt;
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rc = 0;
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out:
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unlock_kernel();
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return rc;
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}
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@ -1323,6 +1325,7 @@ static int ipx_getsockopt(struct socket *sock, int level, int optname,
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int len;
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int rc = -ENOPROTOOPT;
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lock_kernel();
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if (!(level == SOL_IPX && optname == IPX_TYPE))
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goto out;
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@ -1343,6 +1346,7 @@ static int ipx_getsockopt(struct socket *sock, int level, int optname,
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rc = 0;
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out:
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unlock_kernel();
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return rc;
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}
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@ -1391,6 +1395,7 @@ static int ipx_release(struct socket *sock)
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if (!sk)
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goto out;
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lock_kernel();
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if (!sock_flag(sk, SOCK_DEAD))
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sk->sk_state_change(sk);
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@ -1398,6 +1403,7 @@ static int ipx_release(struct socket *sock)
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sock->sk = NULL;
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sk_refcnt_debug_release(sk);
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ipx_destroy_socket(sk);
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unlock_kernel();
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out:
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return 0;
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}
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@ -1425,7 +1431,8 @@ static __be16 ipx_first_free_socketnum(struct ipx_interface *intrfc)
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return htons(socketNum);
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}
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static int ipx_bind(struct socket *sock, struct sockaddr *uaddr, int addr_len)
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static int __ipx_bind(struct socket *sock,
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struct sockaddr *uaddr, int addr_len)
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{
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struct sock *sk = sock->sk;
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struct ipx_sock *ipxs = ipx_sk(sk);
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@ -1520,6 +1527,17 @@ out:
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return rc;
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}
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static int ipx_bind(struct socket *sock, struct sockaddr *uaddr, int addr_len)
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{
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int rc;
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lock_kernel();
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rc = __ipx_bind(sock, uaddr, addr_len);
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unlock_kernel();
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return rc;
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}
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static int ipx_connect(struct socket *sock, struct sockaddr *uaddr,
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int addr_len, int flags)
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{
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@ -1532,6 +1550,7 @@ static int ipx_connect(struct socket *sock, struct sockaddr *uaddr,
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sk->sk_state = TCP_CLOSE;
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sock->state = SS_UNCONNECTED;
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lock_kernel();
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if (addr_len != sizeof(*addr))
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goto out;
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addr = (struct sockaddr_ipx *)uaddr;
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@ -1551,7 +1570,7 @@ static int ipx_connect(struct socket *sock, struct sockaddr *uaddr,
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IPX_NODE_LEN);
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#endif /* CONFIG_IPX_INTERN */
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rc = ipx_bind(sock, (struct sockaddr *)&uaddr,
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rc = __ipx_bind(sock, (struct sockaddr *)&uaddr,
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sizeof(struct sockaddr_ipx));
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if (rc)
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goto out;
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@ -1578,6 +1597,7 @@ static int ipx_connect(struct socket *sock, struct sockaddr *uaddr,
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ipxrtr_put(rt);
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rc = 0;
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out:
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unlock_kernel();
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return rc;
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}
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@ -1593,6 +1613,7 @@ static int ipx_getname(struct socket *sock, struct sockaddr *uaddr,
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*uaddr_len = sizeof(struct sockaddr_ipx);
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lock_kernel();
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if (peer) {
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rc = -ENOTCONN;
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if (sk->sk_state != TCP_ESTABLISHED)
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@ -1627,6 +1648,19 @@ static int ipx_getname(struct socket *sock, struct sockaddr *uaddr,
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rc = 0;
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out:
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unlock_kernel();
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return rc;
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}
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static unsigned int ipx_datagram_poll(struct file *file, struct socket *sock,
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poll_table *wait)
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{
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int rc;
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lock_kernel();
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rc = datagram_poll(file, sock, wait);
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unlock_kernel();
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return rc;
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}
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@ -1701,6 +1735,7 @@ static int ipx_sendmsg(struct kiocb *iocb, struct socket *sock,
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int rc = -EINVAL;
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int flags = msg->msg_flags;
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lock_kernel();
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/* Socket gets bound below anyway */
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/* if (sk->sk_zapped)
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return -EIO; */ /* Socket not bound */
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@ -1724,7 +1759,7 @@ static int ipx_sendmsg(struct kiocb *iocb, struct socket *sock,
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memcpy(uaddr.sipx_node, ipxs->intrfc->if_node,
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IPX_NODE_LEN);
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#endif
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rc = ipx_bind(sock, (struct sockaddr *)&uaddr,
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rc = __ipx_bind(sock, (struct sockaddr *)&uaddr,
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sizeof(struct sockaddr_ipx));
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if (rc)
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goto out;
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@ -1752,6 +1787,7 @@ static int ipx_sendmsg(struct kiocb *iocb, struct socket *sock,
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if (rc >= 0)
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rc = len;
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out:
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unlock_kernel();
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return rc;
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}
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@ -1766,6 +1802,7 @@ static int ipx_recvmsg(struct kiocb *iocb, struct socket *sock,
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struct sk_buff *skb;
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int copied, rc;
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lock_kernel();
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/* put the autobinding in */
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if (!ipxs->port) {
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struct sockaddr_ipx uaddr;
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@ -1780,7 +1817,7 @@ static int ipx_recvmsg(struct kiocb *iocb, struct socket *sock,
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memcpy(uaddr.sipx_node, ipxs->intrfc->if_node, IPX_NODE_LEN);
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#endif /* CONFIG_IPX_INTERN */
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rc = ipx_bind(sock, (struct sockaddr *)&uaddr,
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rc = __ipx_bind(sock, (struct sockaddr *)&uaddr,
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sizeof(struct sockaddr_ipx));
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if (rc)
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goto out;
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@ -1824,6 +1861,7 @@ static int ipx_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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unlock_kernel();
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return rc;
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}
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@ -1835,6 +1873,7 @@ static int ipx_ioctl(struct socket *sock, unsigned int cmd, unsigned long arg)
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struct sock *sk = sock->sk;
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void __user *argp = (void __user *)arg;
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lock_kernel();
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switch (cmd) {
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case TIOCOUTQ:
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amount = sk->sk_sndbuf - sk_wmem_alloc_get(sk);
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@ -1897,6 +1936,7 @@ static int ipx_ioctl(struct socket *sock, unsigned int cmd, unsigned long arg)
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rc = -ENOIOCTLCMD;
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break;
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}
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unlock_kernel();
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return rc;
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}
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@ -1934,7 +1974,7 @@ static const struct net_proto_family ipx_family_ops = {
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.owner = THIS_MODULE,
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};
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static const struct proto_ops SOCKOPS_WRAPPED(ipx_dgram_ops) = {
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static const struct proto_ops ipx_dgram_ops = {
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.family = PF_IPX,
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.owner = THIS_MODULE,
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.release = ipx_release,
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@ -1943,7 +1983,7 @@ static const struct proto_ops SOCKOPS_WRAPPED(ipx_dgram_ops) = {
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.socketpair = sock_no_socketpair,
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.accept = sock_no_accept,
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.getname = ipx_getname,
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.poll = datagram_poll,
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.poll = ipx_datagram_poll,
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.ioctl = ipx_ioctl,
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#ifdef CONFIG_COMPAT
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.compat_ioctl = ipx_compat_ioctl,
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@ -1958,8 +1998,6 @@ static const struct proto_ops SOCKOPS_WRAPPED(ipx_dgram_ops) = {
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.sendpage = sock_no_sendpage,
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};
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SOCKOPS_WRAP(ipx_dgram, PF_IPX);
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static struct packet_type ipx_8023_packet_type __read_mostly = {
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.type = cpu_to_be16(ETH_P_802_3),
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.func = ipx_rcv,
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