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NFS: Make clientaddr= optional 

For NFSv4 mounts, the clientaddr= mount option has always been
required.  Now we have rpc_localaddr() in the kernel, which was
modeled after the same logic in the mount.nfs command that constructs
the clientaddr= mount option.  If user space doesn't provide a
clientaddr= mount option, the kernel can now construct its own.

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 2012-03-01 17:01:23 -05:00 committed by Trond Myklebust
parent 2e738fdce2
commit 31b8e2aec0
2 changed files with 15 additions and 6 deletions
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15
fs/nfs/client.c
View File

@ -1346,6 +1346,7 @@ int nfs4_init_client(struct nfs_client *clp,
rpc_authflavor_t authflavour,
int noresvport)
{
char buf[INET6_ADDRSTRLEN + 1];
int error;
if (clp->cl_cons_state == NFS_CS_READY) {
@ -1361,6 +1362,20 @@ int nfs4_init_client(struct nfs_client *clp,
1, noresvport);
if (error < 0)
goto error;
/* If no clientaddr= option was specified, find a usable cb address */
if (ip_addr == NULL) {
struct sockaddr_storage cb_addr;
struct sockaddr *sap = (struct sockaddr *)&cb_addr;
error = rpc_localaddr(clp->cl_rpcclient, sap, sizeof(cb_addr));
if (error < 0)
goto error;
error = rpc_ntop(sap, buf, sizeof(buf));
if (error < 0)
goto error;
ip_addr = (const char *)buf;
}
strlcpy(clp->cl_ipaddr, ip_addr, sizeof(clp->cl_ipaddr));
error = nfs_idmap_new(clp);

6
fs/nfs/super.c
View File

@ -2557,12 +2557,6 @@ static int nfs4_validate_text_mount_data(void *options,
return -EINVAL;
}
if (args->client_address == NULL) {
dfprintk(MOUNT,
"NFS4: mount program didn't pass callback address\n");
return -EINVAL;
}
return nfs_parse_devname(dev_name,
&args->nfs_server.hostname,
NFS4_MAXNAMLEN,