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https://github.com/psankar/simplefs.git
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7023aebf18
This must avoid next error: [ 6.694339] Journal device is: unknown-block(7,0) [ 6.695620] JBD2: no valid journal superblock found
136 lines
2.4 KiB
Bash
Executable File
136 lines
2.4 KiB
Bash
Executable File
#!/usr/bin/env bash
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#
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# Do some simple operations with simplefs
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#
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# - create fs
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# - create files in it
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# - create dirs in it
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# - read files in it
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# - write files in it
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#
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# TODO: add support of perms into simplefs,
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# to avoid calling this script from root.
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#
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set -e
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echo 1 >| /sys/module/jbd2/parameters/jbd2_debug
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root_pwd="$PWD"
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test_dir="test-dir-$RANDOM"
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test_mount_point="test-mount-point-$RANDOM"
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test_journal_dev=""
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function create_journal()
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{
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dd bs=1M count=10 if=/dev/zero of="$1"
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mke2fs -b 4096 -O journal_dev "$1"
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}
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function create_test_image()
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{
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dd bs=4096 count=100 if=/dev/zero of="$1"
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./mkfs-simplefs "$1"
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}
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function mount_fs_image()
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{
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insmod simplefs.ko
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test_journal_dev=$(losetup -f --show "$1")
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mount -o loop,owner,group,users,journal_path="$test_journal_dev" -t simplefs "$2" "$3"
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dmesg | tail -n20
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}
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function unmount_fs()
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{
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umount "$1"
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losetup -d $test_journal_dev
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rmmod simplefs.ko
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dmesg | tail -n20
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}
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function do_some_operations()
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{
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cd "$1"
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ls
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cat vanakkam
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cp vanakkam hello
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cat hello
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echo "Hello World" > hello
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cat hello
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mkdir dir1 && cd dir1
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cp ../hello .
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cat hello
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echo "First level directory" > hello
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cat hello
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mkdir dir2 && cd dir2
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touch hello
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cat hello
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echo "Second level directory" > hello
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cat hello
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cp hello hello_smaller
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echo "directory" > hello_smaller
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cat hello_smaller
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}
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function do_read_operations()
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{
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cd "$1"
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ls -lR
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cat vanakkam
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cat hello
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cat hello
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cd dir1
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cat hello
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cd dir2
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cat hello
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cat hello_smaller
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}
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function cleanup()
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{
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cd "$root_pwd"
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[ -d "$test_mount_point" ] && umount -t simplefs "$test_mount_point"
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lsmod | grep -q simplefs && rmmod "$root_pwd/simplefs.ko"
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# TODO: prompt deletion
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rm -fR "$test_dir" "$test_mount_point"
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}
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# Trace all commands
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set -x
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make
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cleanup
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trap cleanup SIGINT EXIT
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mkdir "$test_dir" "$test_mount_point"
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create_test_image "$test_dir/image"
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create_journal "$test_dir/journal"
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# 1
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mount_fs_image "$test_dir/journal" "$test_dir/image" "$test_mount_point"
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do_some_operations "$test_mount_point"
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cd "$root_pwd"
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unmount_fs "$test_mount_point"
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# 2
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mount_fs_image "$test_dir/journal" "$test_dir/image" "$test_mount_point"
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do_read_operations "$test_mount_point"
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cd "$root_pwd"
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unmount_fs "$test_mount_point"
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dmesg | tail -n40
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cleanup
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