1 /* 2 * Copyright (C) 2006 Red Hat, Inc. All Rights Reserved. 3 * Written by David Howells (dhowells@redhat.com) 4 */ 5 6 #include <linux/nfs_fs.h> 7 #include "nfs4_fs.h" 8 #include "internal.h" 9 10 #define NFSDBG_FACILITY NFSDBG_CLIENT 11 12 int nfs4_get_rootfh(struct nfs_server *server, struct nfs_fh *mntfh) 13 { 14 struct nfs_fsinfo fsinfo; 15 int ret = -ENOMEM; 16 17 dprintk("--> nfs4_get_rootfh()\n"); 18 19 fsinfo.fattr = nfs_alloc_fattr(); 20 if (fsinfo.fattr == NULL) 21 goto out; 22 23 /* Start by getting the root filehandle from the server */ 24 ret = nfs4_proc_get_rootfh(server, mntfh, &fsinfo); 25 if (ret < 0) { 26 dprintk("nfs4_get_rootfh: getroot error = %d\n", -ret); 27 goto out; 28 } 29 30 if (!(fsinfo.fattr->valid & NFS_ATTR_FATTR_TYPE) 31 || !S_ISDIR(fsinfo.fattr->mode)) { 32 printk(KERN_ERR "nfs4_get_rootfh:" 33 " getroot encountered non-directory\n"); 34 ret = -ENOTDIR; 35 goto out; 36 } 37 38 if (fsinfo.fattr->valid & NFS_ATTR_FATTR_V4_REFERRAL) { 39 printk(KERN_ERR "nfs4_get_rootfh:" 40 " getroot obtained referral\n"); 41 ret = -EREMOTE; 42 goto out; 43 } 44 45 memcpy(&server->fsid, &fsinfo.fattr->fsid, sizeof(server->fsid)); 46 out: 47 nfs_free_fattr(fsinfo.fattr); 48 dprintk("<-- nfs4_get_rootfh() = %d\n", ret); 49 return ret; 50 } 51