4 # Tests file clone functionality of btrfs ("reflinks"):
6 # - Reflink the reflinked file
7 # - Modify the original file
8 # - Modify the reflinked file
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29 seqres=$RESULT_DIR/$seq
30 echo "QA output created by $seq"
34 status=1 # failure is the default!
35 trap "_cleanup; exit \$status" 0 1 2 3 15
43 # get standard environment, filters and checks
47 # real QA test starts here
51 _require_xfs_io_command "fiemap"
54 TESTDIR1=$TEST_DIR/test-$seq
59 for F in original copy1 copy2
61 md5sum $TESTDIR1/$F | _filter_test_dir
67 echo "Create the original file and reflink to copy1, copy2"
68 $XFS_IO_PROG -f -c 'pwrite -S 0x61 0 9000' $TESTDIR1/original \
70 cp --reflink $TESTDIR1/original $TESTDIR1/copy1
71 cp --reflink $TESTDIR1/copy1 $TESTDIR1/copy2
72 _verify_reflink $TESTDIR1/original $TESTDIR1/copy1
73 _verify_reflink $TESTDIR1/original $TESTDIR1/copy2
74 echo "Original md5sums:"
77 echo "Overwrite original file with new data"
78 $XFS_IO_PROG -c 'pwrite -S 0x62 0 9000' $TESTDIR1/original \
80 echo "md5sums after overwriting original:"
83 echo "Overwrite copy1 with different new data"
84 $XFS_IO_PROG -c 'pwrite -S 0x63 0 9000' $TESTDIR1/copy1 \
86 echo "md5sums after overwriting copy1:"