LU-8900 snapshot: rename filesysetem fsname

[fs/lustre-release.git] / lustre / utils / mount_utils_ldiskfs.c

diff --git a/lustre/utils/mount_utils_ldiskfs.c b/lustre/utils/mount_utils_ldiskfs.c
index d93a483..b1edf54 100644 (file)
--- a/lustre/utils/mount_utils_ldiskfs.c
+++ b/lustre/utils/mount_utils_ldiskfs.c
@@ -1314,6 +1314,69 @@ int ldiskfs_label_lustre(struct mount_opts *mop)
        return rc;
 }
 
+int ldiskfs_rename_fsname(struct mkfs_opts *mop, const char *oldname)
+{
+       struct mount_opts opts;
+       struct lustre_disk_data *ldd = &mop->mo_ldd;
+       char mntpt[] = "/tmp/mntXXXXXX";
+       char *dev;
+       int ret;
+
+       /* Change the filesystem label. */
+       opts.mo_ldd = *ldd;
+       opts.mo_source = mop->mo_device;
+       ret = ldiskfs_label_lustre(&opts);
+       if (ret) {
+               if (errno != 0)
+                       ret = errno;
+               fprintf(stderr, "Can't change filesystem label: %s\n",
+                       strerror(ret));
+               return ret;
+       }
+
+       /* Mount this device temporarily in order to write these files */
+       if (mkdtemp(mntpt) == NULL) {
+               if (errno != 0)
+                       ret = errno;
+               else
+                       ret = EINVAL;
+               fprintf(stderr, "Can't create temp mount point %s: %s\n",
+                       mntpt, strerror(ret));
+               return ret;
+       }
+
+#ifdef HAVE_SELINUX
+       /*
+        * Append file context to mount options if SE Linux is enabled
+        */
+       if (is_selinux_enabled() > 0)
+               append_context_for_mount(mntpt, mop);
+#endif
+
+       if (mop->mo_flags & MO_IS_LOOP)
+               dev = mop->mo_loopdev;
+       else
+               dev = mop->mo_device;
+       ret = mount(dev, mntpt, MT_STR(ldd), 0, ldd->ldd_mount_opts);
+       if (ret) {
+               if (errno != 0)
+                       ret = errno;
+               fprintf(stderr, "Unable to mount %s: %s\n",
+                       dev, strerror(ret));
+               if (ret == ENODEV)
+                       fprintf(stderr, "Is the %s module available?\n",
+                               MT_STR(ldd));
+               goto out_rmdir;
+       }
+
+       ret = lustre_rename_fsname(mop, mntpt, oldname);
+       umount(mntpt);
+
+out_rmdir:
+       rmdir(mntpt);
+       return ret;
+}
+
 /* Enable quota accounting */
 int ldiskfs_enable_quota(struct mkfs_opts *mop)
 {