Add the rt linux 4.1.3-rt3 as base

[kvmfornfv.git] / kernel / fs / nfs / nfs4getroot.c

diff --git a/kernel/fs/nfs/nfs4getroot.c b/kernel/fs/nfs/nfs4getroot.c
new file mode 100644 (file)
index 0000000..c0b3a16
--- /dev/null
+++ b/kernel/fs/nfs/nfs4getroot.c
@@ -0,0 +1,50 @@
+/*
+* Copyright (C) 2006 Red Hat, Inc. All Rights Reserved.
+* Written by David Howells (dhowells@redhat.com)
+*/
+
+#include <linux/nfs_fs.h>
+#include "nfs4_fs.h"
+#include "internal.h"
+
+#define NFSDBG_FACILITY                NFSDBG_CLIENT
+
+int nfs4_get_rootfh(struct nfs_server *server, struct nfs_fh *mntfh, bool auth_probe)
+{
+       struct nfs_fsinfo fsinfo;
+       int ret = -ENOMEM;
+
+       dprintk("--> nfs4_get_rootfh()\n");
+
+       fsinfo.fattr = nfs_alloc_fattr();
+       if (fsinfo.fattr == NULL)
+               goto out;
+
+       /* Start by getting the root filehandle from the server */
+       ret = nfs4_proc_get_rootfh(server, mntfh, &fsinfo, auth_probe);
+       if (ret < 0) {
+               dprintk("nfs4_get_rootfh: getroot error = %d\n", -ret);
+               goto out;
+       }
+
+       if (!(fsinfo.fattr->valid & NFS_ATTR_FATTR_TYPE)
+                       || !S_ISDIR(fsinfo.fattr->mode)) {
+               printk(KERN_ERR "nfs4_get_rootfh:"
+                      " getroot encountered non-directory\n");
+               ret = -ENOTDIR;
+               goto out;
+       }
+
+       if (fsinfo.fattr->valid & NFS_ATTR_FATTR_V4_REFERRAL) {
+               printk(KERN_ERR "nfs4_get_rootfh:"
+                      " getroot obtained referral\n");
+               ret = -EREMOTE;
+               goto out;
+       }
+
+       memcpy(&server->fsid, &fsinfo.fattr->fsid, sizeof(server->fsid));
+out:
+       nfs_free_fattr(fsinfo.fattr);
+       dprintk("<-- nfs4_get_rootfh() = %d\n", ret);
+       return ret;
+}