tests/zfs-tests/tests/functional/cli_root/zfs_mount/zfs_multi_mount.ksh

   1 #!/bin/ksh -p
   2 #
   3 # CDDL HEADER START
   4 #
   5 # This file and its contents are supplied under the terms of the
   6 # Common Development and Distribution License ("CDDL"), version 1.0.
   7 # You may only use this file in accordance with the terms of version
   8 # 1.0 of the CDDL.
   9 #
  10 # A full copy of the text of the CDDL should have accompanied this
  11 # source.  A copy is of the CDDL is also available via the Internet
  12 # at http://www.illumos.org/license/CDDL.
  13 #
  14 # CDDL HEADER END
  15 #
  16
  17 #
  18 # Copyright(c) 2018 Datto Inc.
  19 #
  20
  21 . $STF_SUITE/include/libtest.shlib
  22
  23 #
  24 # DESCRIPTION:
  25 # Verify multi mount functionality
  26 #
  27 # STRATEGY:
  28 # 1. Create fs
  29 # 2. Create and hold open file in filesystem
  30 # 3. Lazy unmount
  31 # 4. Verify remounting fs that was lazily unmounted is possible
  32 # 5. Verify multiple mounts of the same dataset are possible
  33 # 6. Verify bind mount doesn't prevent rename
  34 #
  35
  36 verify_runnable "both"
  37
  38 function cleanup
  39 {
  40         ismounted $MNTPFS && log_must umount $MNTPFS
  41         ismounted $MNTPFS2 && log_must umount $MNTPFS2
  42         ismounted $MNTPFS3 && log_must umount $MNTPFS3
  43         ismounted $MNTPFS4 && log_must umount $MNTPFS4
  44         ismounted $RENAMEMNT && log_must umount $RENAMEMNT
  45         datasetexists $TESTDS && log_must destroy_dataset "$TESTDS" "-f"
  46 }
  47 log_onexit cleanup
  48
  49 log_assert "Verify multiple mounts into one namespace are possible"
  50
  51 # 1. Create fs
  52 TESTDS="$TESTPOOL/multi-mount-test"
  53 log_must zfs create $TESTDS
  54
  55 # 2. Create and hold open file in filesystem
  56 MNTPFS="$(get_prop mountpoint $TESTDS)"
  57 FILENAME="$MNTPFS/file"
  58 log_must mkfile 128k $FILENAME
  59 log_must exec 9<> $FILENAME # open file
  60
  61 # 3. Lazy umount
  62 log_must umount -l $MNTPFS
  63 if [ -f $FILENAME ]; then
  64         log_fail "Lazy unmount failed"
  65 fi
  66
  67 # 4. Verify remounting fs that was lazily unmounted is possible
  68 log_must zfs mount $TESTDS
  69 if [ ! -f $FILENAME ]; then
  70         log_fail "Lazy remount failed"
  71 fi
  72 log_must exec 9>&- # close fd
  73
  74 # 5. Verify multiple mounts of the same dataset are possible
  75 MNTPFS2="$MNTPFS-second"
  76 FILENAME="$MNTPFS2/file"
  77 log_must mkdir $MNTPFS2
  78 log_must mount -t zfs -o zfsutil $TESTDS $MNTPFS2
  79 if [ ! -f $FILENAME ]; then
  80         log_fail "First multi mount failed"
  81 fi
  82
  83 MNTPFS3="$MNTPFS-third"
  84 FILENAME="$MNTPFS3/file"
  85 log_must mkdir $MNTPFS3
  86 log_must mount -t zfs -o zfsutil $TESTDS $MNTPFS3
  87 if [ ! -f $FILENAME ]; then
  88         log_fail "Second multi mount failed"
  89 fi
  90
  91 # 6. Verify bind mount doesn't prevent rename
  92 RENAMEFS="$TESTDS-newname"
  93 MNTPFS4="$MNTPFS-fourth"
  94 log_must mkdir $MNTPFS4
  95 log_must mount --bind $MNTPFS $MNTPFS4
  96 log_must zfs rename $TESTDS $RENAMEFS
  97 RENAMEMNT="$(get_prop mountpoint $RENAMEFS)"
  98 FILENAME="$RENAMEMNT/file"
  99 if [ ! -f $FILENAME ]; then
 100         log_fail "Rename failed"
 101 fi
 102 log_must zfs rename $RENAMEFS $TESTDS
 103
 104 log_pass "Multiple mounts are possible"