debianforum.de

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.         set +e
19.         zpool status zfstest | grep -i corruption > /dev/null
20.         if [ $? -eq 0 ]
21.         then
22.                 echo "zfs detected corruption"
23.                 RET=1
24.         else
25.                 echo "zfs detected no corruption"
26.                 RET=0
27.         fi
28.         set -e
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. print_corruption
61. echo "corrupting filesystem"
62. echo -n -e '\x34' | dd of=$ZFSDEVICE seek=290000003 bs=1 conv=notrunc 2> /dev/null
63. #./disktest $ZFSDEVICE 34 290000003
64. sync
65. echo 3 > /proc/sys/vm/drop_caches
66.  
67. echo "trying to read a file from corrupted filesysten with shasum"
68. set +e
69. SUM_B=`shasum /zfstest/testfile`
70. echo "$SUM_B"
71. set -e
72. print_corruption
73. CORRUPTED=$?
74. if [ "$SUM_A" != "$SUM_B" ]
75. then
76.         if [ $CORRUPTED -eq 0 ]
77.         then
78.                 echo "${RED}the pool is silently corrupted${NC}"
79.                 trap empty EXIT
80.                 exit 0
81.         else
82.                 echo "${RED}zfs detected the corruption${NC}"
83.         fi
84. else
85.         echo "no corruption in file"
86. fi

Quellcode

Hier kannst du den Code kopieren und ihn in deinen bevorzugten Editor einfügen. PASTEBIN_DOWNLOAD_SNIPPET_EXPLAIN