zfs/tests/zfs-tests/tests/functional/cli_root/zfs_snapshot/zfs_snapshot_004_neg.ksh

   1 #!/bin/ksh -p
   2 #
   3 # CDDL HEADER START
   4 #
   5 # The contents of this file are subject to the terms of the
   6 # Common Development and Distribution License (the "License").
   7 # You may not use this file except in compliance with the License.
   8 #
   9 # You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
  10 # or http://www.opensolaris.org/os/licensing.
  11 # See the License for the specific language governing permissions
  12 # and limitations under the License.
  13 #
  14 # When distributing Covered Code, include this CDDL HEADER in each
  15 # file and include the License file at usr/src/OPENSOLARIS.LICENSE.
  16 # If applicable, add the following below this CDDL HEADER, with the
  17 # fields enclosed by brackets "[]" replaced with your own identifying
  18 # information: Portions Copyright [yyyy] [name of copyright owner]
  19 #
  20 # CDDL HEADER END
  21 #
  22
  23 #
  24 # Copyright 2008 Sun Microsystems, Inc.  All rights reserved.
  25 # Use is subject to license terms.
  26 #
  27
  28 . $STF_SUITE/include/libtest.shlib
  29
  30 #
  31 # DESCRIPTION:
  32 #       Verify recursive snapshotting could not break ZFS.
  33 #
  34 # STRATEGY:
  35 #       1. Create deeply-nested filesystems until it is too long to create snap
  36 #       2. Verify zfs snapshot -r pool@snap will not break ZFS
  37 #
  38
  39 verify_runnable "both"
  40
  41 function cleanup
  42 {
  43         if datasetexists $initfs ; then
  44                 log_must $ZFS destroy -rf $initfs
  45         fi
  46 }
  47
  48 log_assert "Verify recursive snapshotting could not break ZFS."
  49 log_onexit cleanup
  50
  51 initfs=$TESTPOOL/$TESTFS/$TESTFS
  52 basefs=$initfs
  53 typeset -i ret=0 len snaplen
  54 while ((ret == 0)); do
  55         $ZFS create $basefs
  56         $ZFS snapshot $basefs@snap1
  57         ret=$?
  58
  59         if ((ret != 0)); then
  60                 len=$($ECHO $basefs| $WC -c)
  61                 log_note "The deeply-nested filesystem len: $len"
  62
  63                 #
  64                 # Make sure there are at lease 2 characters left
  65                 # for snapshot name space, otherwise snapshot name
  66                 # is incorrect
  67                 #
  68                 if ((len >= 255)); then
  69                         if datasetexists $basefs; then
  70                                 log_must $ZFS destroy -r $basefs
  71                         fi
  72                         basefs=${basefs%/*}
  73                         len=$($ECHO $basefs| $WC -c)
  74                 fi
  75                 break
  76         fi
  77
  78         basefs=$basefs/$TESTFS
  79 done
  80
  81 # Make snapshot name is longer than the max length
  82 ((snaplen = 256 - len + 10))
  83 snap=$(gen_dataset_name $snaplen "s")
  84 log_mustnot $ZFS snapshot -r $TESTPOOL@$snap
  85
  86 log_must datasetnonexists $TESTPOOL@$snap
  87 while [[ $basefs != $TESTPOOL ]]; do
  88         log_must datasetnonexists $basefs@$snap
  89         basefs=${basefs%/*}
  90 done
  91
  92 log_pass "Verify recursive snapshotting could not break ZFS."