2 # SPDX-License-Identifier: GPL-2.0
3 # Copyright (c) 2015, Oracle and/or its affiliates. All Rights Reserved.
7 # Ensuring that copy on write through the page cache works:
8 # - Reflink two files together
9 # - Write to the beginning, middle, and end
10 # - Check that the files are now different where we say they're different.
13 seqres=$RESULT_DIR/$seq
14 echo "QA output created by $seq"
18 status=1 # failure is the default!
19 trap "_cleanup; exit \$status" 0 1 2 3 15
24 rm -rf $tmp.* $testdir
27 # get standard environment, filters and checks
32 # real QA test starts here
38 testdir=$TEST_DIR/test-$seq
42 echo "Create the original files"
44 _pwrite_byte 0x61 0 $((blksz * 48 - 3)) $testdir/file1 >> $seqres.full
45 _cp_reflink $testdir/file1 $testdir/file2 >> $seqres.full
46 _pwrite_byte 0x61 0 $((blksz * 48 - 3)) $testdir/file3 >> $seqres.full
50 md5sum $testdir/file1 | _filter_test_dir
51 md5sum $testdir/file2 | _filter_test_dir
52 md5sum $testdir/file3 | _filter_test_dir
54 cmp -s $testdir/file1 $testdir/file2 || echo "Files 1-2 do not match"
55 cmp -s $testdir/file1 $testdir/file3 || echo "Files 1-3 do not match"
56 cmp -s $testdir/file2 $testdir/file3 || echo "Files 2-3 do not match"
58 echo "pagecache CoW the second file"
59 _pwrite_byte 0x62 0 17 $testdir/file2 >> $seqres.full
60 _pwrite_byte 0x62 0 17 $testdir/file3 >> $seqres.full
62 _pwrite_byte 0x62 $((blksz * 16 - 34)) 17 $testdir/file2 >> $seqres.full
63 _pwrite_byte 0x62 $((blksz * 16 - 34)) 17 $testdir/file3 >> $seqres.full
65 _pwrite_byte 0x62 $((blksz * 48 - 8)) 17 $testdir/file2 >> $seqres.full
66 _pwrite_byte 0x62 $((blksz * 48 - 8)) 17 $testdir/file3 >> $seqres.full
70 md5sum $testdir/file1 | _filter_test_dir
71 md5sum $testdir/file2 | _filter_test_dir
72 md5sum $testdir/file3 | _filter_test_dir
74 cmp -s $testdir/file1 $testdir/file2 || echo "Files 1-2 do not match (intentional)"
75 cmp -s $testdir/file1 $testdir/file3 || echo "Files 1-3 do not match (intentional)"
76 cmp -s $testdir/file2 $testdir/file3 || echo "Files 2-3 do not match"
78 echo "Compare the CoW'd section to the before file"
79 _compare_range $testdir/file1 0 $testdir/file2 0 17 \
80 || echo "Start sections do not match (intentional)"
82 _compare_range $testdir/file1 $((blksz * 16 - 34)) \
83 $testdir/file2 $((blksz * 16 - 34)) 17 \
84 || echo "Middle sections do not match (intentional)"
86 _compare_range $testdir/file1 $((blksz * 48 - 8)) \
87 $testdir/file2 $((blksz * 48 - 8)) 17 \
88 || echo "End sections do not match (intentional)"
90 echo "Compare the CoW'd section to the after file"
91 _compare_range $testdir/file2 0 $testdir/file3 0 17 \
92 || echo "Start sections do not match"
94 _compare_range $testdir/file2 $((blksz * 16 - 34)) \
95 $testdir/file3 $((blksz * 16 - 34)) 17 \
96 || echo "Middle sections do not match"
98 _compare_range $testdir/file2 $((blksz * 48 - 8)) \
99 $testdir/file3 $((blksz * 48 - 8)) 17 \
100 || echo "End sections do not match"
102 echo "Compare the not CoW'd sections"
103 _compare_range $testdir/file1 18 $testdir/file2 18 17 \
104 || echo "Start sections of 1-2 do not match"
106 _compare_range $testdir/file2 18 $testdir/file3 18 17 \
107 || echo "Start sections of 2-3 do not match"
110 _compare_range $testdir/file1 $((blksz * 16 - 17)) \
111 $testdir/file2 $((blksz * 16 - 17)) 82 \
112 || echo "Middle sections of 1-2 do not match"
114 _compare_range $testdir/file2 $((blksz * 16 - 17)) \
115 $testdir/file3 $((blksz * 16 - 17)) 82 \
116 || echo "Middle sections of 2-3 do not match"
118 _compare_range $testdir/file1 $((blksz * 48 - 108)) \
119 $testdir/file2 $((blksz * 48 - 108)) 100 \
120 || echo "End sections of 1-2 do not match"
122 _compare_range $testdir/file2 $((blksz * 48 - 108)) \
123 $testdir/file3 $((blksz * 48 - 108)) 100 \
124 || echo "End sections of 2-3 do not match"
127 _compare_range $testdir/file1 $((blksz * 14)) \
128 $testdir/file2 $((blksz * 14)) $blksz \
129 || echo "Untouched sections of 1-2 do not match"
131 _compare_range $testdir/file2 $((blksz * 14)) \
132 $testdir/file3 $((blksz * 14)) $blksz \
133 || echo "Untouched sections of 2-3 do not match"