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Linux/fs/nfs/nfs4getroot.c

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  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, bool auth_probe)
 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, auth_probe);
 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         memcpy(&server->fsid, &fsinfo.fattr->fsid, sizeof(server->fsid));
 39 out:
 40         nfs_free_fattr(fsinfo.fattr);
 41         dprintk("<-- nfs4_get_rootfh() = %d\n", ret);
 42         return ret;
 43 }
 44 

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