tests/btrfs/127

   1 #! /bin/bash
   2 # SPDX-License-Identifier: GPL-2.0
   3 # Copyright (C) 2016 SUSE Linux Products GmbH. All Rights Reserved.
   4 #
   5 # FS QA Test No. btrfs/127
   6 #
   7 # Test that an incremental send operation works after doing radical changes
   8 # in the directory hierarchy that involve switching the inode that directory
   9 # entries point to.
  10 #
  11 . ./common/preamble
  12 _begin_fstest auto quick send
  13
  14 # Override the default cleanup function.
  15 _cleanup()
  16 {
  17         cd /
  18         rm -fr $send_files_dir
  19         rm -f $tmp.*
  20 }
  21
  22 # Import common functions.
  23 . ./common/filter
  24
  25 # real QA test starts here
  26 _supported_fs btrfs
  27 _require_test
  28 _require_scratch
  29 _require_fssum
  30
  31 send_files_dir=$TEST_DIR/btrfs-test-$seq
  32
  33 rm -fr $send_files_dir
  34 mkdir $send_files_dir
  35
  36 _scratch_mkfs >>$seqres.full 2>&1
  37 _scratch_mount
  38
  39 # case 1
  40 mkdir -p $SCRATCH_MNT/case_1/d/p1
  41 mkdir $SCRATCH_MNT/case_1/p1
  42
  43 # case 2
  44 mkdir -p $SCRATCH_MNT/case_2/a
  45 mkdir $SCRATCH_MNT/case_2/d
  46 mkdir $SCRATCH_MNT/case_2/e
  47 mkdir $SCRATCH_MNT/case_2/f
  48 mkdir $SCRATCH_MNT/case_2/ance
  49 mkdir $SCRATCH_MNT/case_2/d/ance
  50 mkdir $SCRATCH_MNT/case_2/a/c
  51 mv $SCRATCH_MNT/case_2/e $SCRATCH_MNT/case_2/d/ance
  52 mv $SCRATCH_MNT/case_2/f $SCRATCH_MNT/case_2/d/ance
  53 mv $SCRATCH_MNT/case_2/ance $SCRATCH_MNT/case_2/d/ance
  54
  55 # case 3
  56 mkdir -p $SCRATCH_MNT/case_3/d
  57 mkdir $SCRATCH_MNT/case_3/a
  58 mkdir $SCRATCH_MNT/case_3/waiting_dir
  59 mkdir -p $SCRATCH_MNT/case_3/pre/ance
  60 mkdir $SCRATCH_MNT/case_3/d/ance
  61 mkdir $SCRATCH_MNT/case_3/a/c
  62 mv $SCRATCH_MNT/case_3/waiting_dir $SCRATCH_MNT/case_3/d/ance
  63
  64 # case 4
  65 mkdir -p $SCRATCH_MNT/case_4/tmp
  66 mkdir $SCRATCH_MNT/case_4/below_ance
  67 mkdir -p $SCRATCH_MNT/case_4/pre/wait_dir
  68 mkdir $SCRATCH_MNT/case_4/desc
  69 mkdir $SCRATCH_MNT/case_4/ance
  70 mv $SCRATCH_MNT/case_4/below_ance $SCRATCH_MNT/case_4/ance
  71 mkdir $SCRATCH_MNT/case_4/other_dir
  72
  73 # Filesystem looks like:
  74 #
  75 # .                                                                  (ino 256)
  76 # |--- case_1/                                                       (ino 257)
  77 # |       |---- d/                                                   (ino 258)
  78 # |       |     |--- p1/                                             (ino 259)
  79 # |       |
  80 # |       |---- p1/                                                  (ino 260)
  81 # |
  82 # |--- case_2/                                                       (ino 261)
  83 # |       |---- a/                                                   (ino 262)
  84 # |       |     |---- c/                                             (ino 268)
  85 # |       |
  86 # |       |---- d/                                                   (ino 263)
  87 # |             |---- ance/                                          (ino 267)
  88 # |                     |---- e/                                     (ino 264)
  89 # |                     |---- f/                                     (ino 265)
  90 # |                     |---- ance/                                  (ino 266)
  91 # |
  92 # |--- case_3/                                                       (ino 269)
  93 # |       |---- a/                                                   (ino 271)
  94 # |       |     |---- c/                                             (ino 276)
  95 # |       |
  96 # |       |---- d/                                                   (ino 270)
  97 # |       |     |---- ance/                                          (ino 275)
  98 # |       |             |---- waiting_dir/                           (ino 272)
  99 # |       |
 100 # |       |---- pre/                                                 (ino 273)
 101 # |              |---- ance/                                         (ino 274)
 102 # |
 103 # |--- case_4/                                                       (ino 277)
 104 #         |---- tmp/                                                 (ino 278)
 105 #         |---- pre/                                                 (ino 280)
 106 #         |      |---- wait_dir/                                     (ino 281)
 107 #         |
 108 #         |---- desc/                                                (ino 282)
 109 #         |---- ance/                                                (ino 283)
 110 #         |       |---- below_ance/                                  (ino 279)
 111 #         |
 112 #         |---- other_dir/                                           (ino 284)
 113 #
 114 _run_btrfs_util_prog subvolume snapshot -r $SCRATCH_MNT $SCRATCH_MNT/mysnap1
 115
 116 # case 1
 117 #
 118 # The directory named "d" (inode 257) has in both snapshots an entry with the
 119 # name "p1" but it refers to different inodes in both snapshots (inode 258 in
 120 # the parent snapshot and inode 259 in the send snapshot). When attempting to
 121 # move inode 258, the operation is delayed because its new parent, inode 259,
 122 # was not yet moved/renamed (as the stream is currently processing inode 258).
 123 # Later on when processing inode 259, btrfs' send also ended up delaying the
 124 # move/rename operation for this inode, so that it would happen after inode 258
 125 # was processed, creating a circular dependency that resulted in the send stream
 126 # terminating without issuing a rename operations for the inodes 258 and 259.
 127 #
 128 mv $SCRATCH_MNT/case_1/d/p1 $SCRATCH_MNT/case_1/p1
 129 mv $SCRATCH_MNT/case_1/p1 $SCRATCH_MNT/case_1/d
 130
 131 # case 2
 132 #
 133 # When the inode 265 is processed, the path for inode 267 is computed, which at
 134 # that time corresponds to "case_2/d/ance", and it was stored in the name cache
 135 # (to avoid recomputing it again later when needed).
 136 # Later on when processing inode 266, btrfs' send end up orphanizing (renaming
 137 # to a name matching the pattern o<ino>-<gen>-<seq>) inode 267 because it has
 138 # the same name as inode 266 and at that time it's a child of the new parent
 139 # directory (inode 263) for inode 266. After the orphanization and while still
 140 # processing inode 266, a rename operation for inode 266 was generated. However
 141 # the source path for that rename operation was incorrect because it ended up
 142 # using the old, pre-orphanization, name of inode 267.
 143 #
 144 mv $SCRATCH_MNT/case_2/a/c $SCRATCH_MNT/case_2
 145 mv $SCRATCH_MNT/case_2/d/ance $SCRATCH_MNT/case_2/c
 146 mv $SCRATCH_MNT/case_2/c/ance/ance $SCRATCH_MNT/case_2/d
 147 mv $SCRATCH_MNT/case_2/c/ance/f $SCRATCH_MNT/case_2
 148 mv $SCRATCH_MNT/case_2/c/ance/e $SCRATCH_MNT/case_2/f
 149
 150 # case 3
 151 #
 152 # This is similar to cases 1 and 2, but adding more complexity just to exercise
 153 # btrfs' incremental send correctness.
 154 #
 155 mv $SCRATCH_MNT/case_3/d/ance $SCRATCH_MNT/case_3/a
 156 mv $SCRATCH_MNT/case_3/a/c $SCRATCH_MNT/case_3
 157 mv $SCRATCH_MNT/case_3/a/ance/waiting_dir $SCRATCH_MNT/case_3/c
 158 mv $SCRATCH_MNT/case_3/pre/ance $SCRATCH_MNT/case_3/d
 159 mv $SCRATCH_MNT/case_3/pre $SCRATCH_MNT/case_3/c/waiting_dir
 160
 161 # case 4
 162 #
 163 # When attempting to rename inode 283, the incremental send stream included an
 164 # invalid destination path for the rename command. This was due to a missing
 165 # path loop detection in the send code that made the rename of inode 283 happen
 166 # without waiting for the rename of inode 284 to happen first (since it's an
 167 # ancestor in the send snapshot that is beyond the current progress and it was
 168 # also renamed/moved).
 169 #
 170 mv $SCRATCH_MNT/case_4/other_dir $SCRATCH_MNT/case_4/tmp
 171 mv $SCRATCH_MNT/case_4/ance/below_ance $SCRATCH_MNT/case_4/tmp/other_dir
 172 mv $SCRATCH_MNT/case_4/pre/wait_dir $SCRATCH_MNT/case_4/tmp/other_dir
 173 mv $SCRATCH_MNT/case_4/pre $SCRATCH_MNT/case_4/tmp/other_dir/below_ance
 174 mv $SCRATCH_MNT/case_4/desc $SCRATCH_MNT/case_4/tmp/other_dir/wait_dir
 175 mv $SCRATCH_MNT/case_4/ance $SCRATCH_MNT/case_4/tmp/other_dir/wait_dir/desc
 176
 177 # Filesystem now looks like:
 178 #
 179 # .                                                                  (ino 256)
 180 # |--- case_1/                                                       (ino 257)
 181 # |        |--- d/                                                   (ino 258)
 182 # |             |--- p1/                                             (ino 260)
 183 # |                   |--- p1/                                       (ino 259)
 184 # |
 185 # |--- case_2/                                                       (ino 261)
 186 # |       |---- a/                                                   (ino 262)
 187 # |       |---- c/                                                   (ino 268)
 188 # |       |     |---- ance/                                          (ino 267)
 189 # |       |
 190 # |       |---- d/                                                   (ino 263)
 191 # |       |     |---- ance/                                          (ino 266)
 192 # |       |
 193 # |       |---- f/                                                   (ino 265)
 194 # |             |---- e/                                             (ino 264)
 195 # |
 196 # |--- case_3/                                                       (ino 269)
 197 # |       |---- a/                                                   (ino 271)
 198 # |       |     |---- ance/                                          (ino 275)
 199 # |       |
 200 # |       |---- c/                                                   (ino 276)
 201 # |       |     |---- waiting_dir/                                   (ino 272)
 202 # |       |                   |---- pre/                             (ino 273)
 203 # |       |
 204 # |       |---- d/                                                   (ino 270)
 205 # |             |---- ance/                                          (ino 274)
 206 # |
 207 # |--- case_4/                                                       (ino 277)
 208 #         |---- tmp/                                                 (ino 278)
 209 #                |---- other_dir/                                    (ino 284)
 210 #                            |---- below_ance/                       (ino 279)
 211 #                            |            |---- pre/                 (ino 280)
 212 #                            |
 213 #                            |---- wait_dir/                         (ino 281)
 214 #                                       |---- desc/                  (ino 282)
 215 #                                               |---- ance/          (ino 283)
 216 #
 217 _run_btrfs_util_prog subvolume snapshot -r $SCRATCH_MNT $SCRATCH_MNT/mysnap2
 218
 219 run_check $FSSUM_PROG -A -f -w $send_files_dir/1.fssum $SCRATCH_MNT/mysnap1
 220 run_check $FSSUM_PROG -A -f -w $send_files_dir/2.fssum \
 221         -x $SCRATCH_MNT/mysnap2/mysnap1 $SCRATCH_MNT/mysnap2
 222
 223 _run_btrfs_util_prog send -f $send_files_dir/1.snap $SCRATCH_MNT/mysnap1
 224 _run_btrfs_util_prog send -p $SCRATCH_MNT/mysnap1 -f $send_files_dir/2.snap \
 225         $SCRATCH_MNT/mysnap2
 226
 227 # Now recreate the filesystem by receiving both send streams and verify we get
 228 # the same content that the original filesystem had.
 229 _scratch_unmount
 230 _scratch_mkfs >>$seqres.full 2>&1
 231 _scratch_mount
 232
 233 _run_btrfs_util_prog receive -f $send_files_dir/1.snap $SCRATCH_MNT
 234 run_check $FSSUM_PROG -r $send_files_dir/1.fssum $SCRATCH_MNT/mysnap1
 235 _run_btrfs_util_prog receive -f $send_files_dir/2.snap $SCRATCH_MNT
 236 run_check $FSSUM_PROG -r $send_files_dir/2.fssum $SCRATCH_MNT/mysnap2
 237
 238 echo "Silence is golden"
 239 status=0
 240 exit