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SUNRPC: rpc_create() default hostname should support AF_INET6 addresses 

If the ULP doesn't pass a hostname string to rpc_create(), it manufactures
one based on the passed-in address.  Be smart enough to handle an AF_INET6
address properly in this case.

Move the default servername logic before the xprt_create_transport() call
to simplify error handling in rpc_create().

Signed-off-by: Chuck Lever <chuck.lever@oracle.com>
Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
This commit is contained in:
Chuck Lever 2007-12-10 14:56:24 -05:00 committed by Trond Myklebust
parent 40c553193d
commit 510deb0d70
1 changed files with 27 additions and 5 deletions
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32
net/sunrpc/clnt.c
View File

@ -30,6 +30,7 @@
#include <linux/smp_lock.h>
#include <linux/utsname.h>
#include <linux/workqueue.h>
#include <linux/in6.h>
#include <linux/sunrpc/clnt.h>
#include <linux/sunrpc/rpc_pipe_fs.h>
@ -247,7 +248,7 @@ struct rpc_clnt *rpc_create(struct rpc_create_args *args)
.addrlen = args->addrsize,
.timeout = args->timeout
};
char servername[20];
char servername[48];
xprt = xprt_create_transport(&xprtargs);
if (IS_ERR(xprt))
@ -258,13 +259,34 @@ struct rpc_clnt *rpc_create(struct rpc_create_args *args)
* up a string representation of the passed-in address.
*/
if (args->servername == NULL) {
struct sockaddr_in *addr =
(struct sockaddr_in *) args->address;
snprintf(servername, sizeof(servername), NIPQUAD_FMT,
NIPQUAD(addr->sin_addr.s_addr));
servername[0] = '\0';
switch (args->address->sa_family) {
case AF_INET: {
struct sockaddr_in *sin =
(struct sockaddr_in *)args->address;
snprintf(servername, sizeof(servername), NIPQUAD_FMT,
NIPQUAD(sin->sin_addr.s_addr));
break;
}
case AF_INET6: {
struct sockaddr_in6 *sin =
(struct sockaddr_in6 *)args->address;
snprintf(servername, sizeof(servername), NIP6_FMT,
NIP6(sin->sin6_addr));
break;
}
default:
/* caller wants default server name, but
* address family isn't recognized. */
return ERR_PTR(-EINVAL);
}
args->servername = servername;
}
xprt = xprt_create_transport(&xprtargs);
if (IS_ERR(xprt))
return (struct rpc_clnt *)xprt;
/*
* By default, kernel RPC client connects from a reserved port.
* CAP_NET_BIND_SERVICE will not be set for unprivileged requesters,