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zfstest

SNIPPET_TEXT:

1. #!/bin/sh
2.  
3. deleteimage () {
4.         if [ ! -b "$ZFSDEVICE" ]
5.         then
6.                 rm $ZFSDEVICE
7.                 sleep 1
8.         fi
9. }
10.  
11. destroypool () {
12.         zpool destroy zfstest
13.         rmdir /zfstest
14.         deleteimage
15. }
16.  
17. print_corruption () {
18.         sleep 1
19.         zpool status zfstest
20.         zpool status zfstest | grep -i corruption > /dev/null
21.         if [ $? -eq 0 ]
22.         then
23.                 echo "zfs detected corruption"
24.                 RET=1
25.         else
26.                 echo "zfs detected no corruption"
27.                 RET=0
28.         fi
29.         return $RET
30. }
31.  
32. empty () {
33.         sleep 0
34. }
35.  
36.  
37. if [ "$#" -ne 1 ]
38. then
39.         echo "Usage: $0 device"
40. fi
41. ZFSDEVICE="$1"
42.  
43. RED='\033[0;31m'
44. GREEN='\033[0;32m'
45. NC='\033[0m'
46.  
47. set -e
48. modprobe -v zfs
49. if [ ! -b "$ZFSDEVICE" ]
50. then
51.         truncate -s 1G $ZFSDEVICE
52. fi
53. trap deleteimage EXIT
54. #set -o xtrace
55. zpool create -f -m /zfstest zfstest `readlink -f $ZFSDEVICE`
56. trap destroypool EXIT
57. dd if=/dev/zero of=/zfstest/testfile bs=1M count=800 2> /dev/null
58. SUM_A=`shasum /zfstest/testfile`
59. echo "$SUM_A"
60. set +e
61. print_corruption
62. set -e
63. echo "corrupting filesystem"
64. echo -n -e '\x34' | dd of=$ZFSDEVICE seek=290000003 bs=1 conv=notrunc 2> /dev/null
65. #./disktest $ZFSDEVICE 34 290000003
66. sync
67. echo 3 > /proc/sys/vm/drop_caches
68.  
69. echo "trying to read a file from corrupted filesysten with shasum"
70. set +e
71. SUM_B=`shasum /zfstest/testfile`
72. echo "$SUM_B"
73. print_corruption
74. CORRUPTED=$?
75. set -e
76. if [ "$SUM_A" != "$SUM_B" ]
77. then
78.         echo "corrupted $CORRUPTED"
79.         if [ $CORRUPTED -eq 0 ]
80.         then
81.                 echo "${RED}the pool is silently corrupted${NC}"
82.                 trap empty EXIT
83.                 exit 0
84.         else
85.                 echo "${GREEN}zfs detected the corruption${NC}"
86.         fi
87. else
88.         echo "no corruption in file"
89. fi

Quellcode

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