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SUNRPC: create an IPv6-savvy mechanism for binding to a reserved port 

Clone xs_bindresvport into two functions, one that can handle IPv4
addresses, and one that can handle IPv6 addresses.

Signed-off-by: Chuck Lever <chuck.lever@oracle.com>
Cc: Aurelien Charbon <aurelien.charbon@ext.bull.net>
Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
This commit is contained in:
Chuck Lever 2007-08-06 11:57:33 -04:00 committed by Trond Myklebust
parent 7dc753f039
commit 90058d37c3
1 changed files with 33 additions and 0 deletions
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33
net/sunrpc/xprtsock.c
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@ -1261,6 +1261,39 @@ static int xs_bind4(struct sock_xprt *transport, struct socket *sock)
return err;
}
static int xs_bind6(struct sock_xprt *transport, struct socket *sock)
{
struct sockaddr_in6 myaddr = {
.sin6_family = AF_INET6,
};
struct sockaddr_in6 *sa;
int err;
unsigned short port = transport->port;
if (!transport->xprt.resvport)
port = 0;
sa = (struct sockaddr_in6 *)&transport->addr;
myaddr.sin6_addr = sa->sin6_addr;
do {
myaddr.sin6_port = htons(port);
err = kernel_bind(sock, (struct sockaddr *) &myaddr,
sizeof(myaddr));
if (!transport->xprt.resvport)
break;
if (err == 0) {
transport->port = port;
break;
}
if (port <= xprt_min_resvport)
port = xprt_max_resvport;
else
port--;
} while (err == -EADDRINUSE && port != transport->port);
dprintk("RPC: xs_bind6 "NIP6_FMT":%u: %s (%d)\n",
NIP6(myaddr.sin6_addr), port, err ? "failed" : "ok", err);
return err;
}
#ifdef CONFIG_DEBUG_LOCK_ALLOC
static struct lock_class_key xs_key[2];
static struct lock_class_key xs_slock_key[2];