NFSv4: Fix the referral mount code

Fix a typo which causes try_location() to use the wrong length argument
when calling nfs_parse_server_name(). This again, causes the initialisation
of the mount's sockaddr structure to fail.

Also ensure that if nfs4_pathname_string() returns an error, then we pass
that error back up the stack instead of ENOENT.

Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>

diff --git a/fs/nfs/nfs4namespace.c b/fs/nfs/nfs4namespace.c
index 2636c26..fa3408f 100644 (file)
--- a/fs/nfs/nfs4namespace.c
+++ b/fs/nfs/nfs4namespace.c
@@ -121,7 +121,7 @@ static struct vfsmount *try_location(struct nfs_clone_mount *mountdata,
 
        mnt_path = nfs4_pathname_string(&location->rootpath, page2, PAGE_SIZE);
        if (IS_ERR(mnt_path))
-               return mnt;
+               return ERR_CAST(mnt_path);
        mountdata->mnt_path = mnt_path;
        maxbuflen = mnt_path - 1 - page2;
 
@@ -132,15 +132,15 @@ static struct vfsmount *try_location(struct nfs_clone_mount *mountdata,
                if (buf->len <= 0 || buf->len >= maxbuflen)
                        continue;
 
-               mountdata->addr = (struct sockaddr *)&addr;
-
                if (memchr(buf->data, IPV6_SCOPE_DELIMITER, buf->len))
                        continue;
-               mountdata->addrlen = nfs_parse_server_name(buf->data,
-                               buf->len,
-                               mountdata->addr, mountdata->addrlen);
+
+               mountdata->addrlen = nfs_parse_server_name(buf->data, buf->len,
+                               (struct sockaddr *)&addr, sizeof(addr));
                if (mountdata->addrlen == 0)
                        continue;
+
+               mountdata->addr = (struct sockaddr *)&addr;
                rpc_set_port(mountdata->addr, NFS_PORT);
 
                memcpy(page2, buf->data, buf->len);