Re: ext4 inode tagging

On 01/14/2012 12:48 AM, Herbert Poetzl wrote:
> On Fri, Jan 13, 2012 at 07:26:13PM +0100, Roberto Puzzanghera wrote:
>> On 01/13/2012 06:02 PM, Herbert Poetzl wrote:
>>> On Fri, Jan 13, 2012 at 05:10:46PM +0100, Roberto Puzzanghera wrote:
>>>> [...]
>
>>>>> no, I don't think that will be necessary, but
>>>>> could you run the following script on your system
>>>>> and provide upload the output somewhere/
>
>>>>>   # mkdir /test
>>>>>   # testfs.sh -vvv -x -F ext4 -M /test -D<device>
>
>>>>> note that<device>    should be a partition, disk or
>>>>> loopback device you do not mind to be reformatted
>>>>> with ext4 (all data will be destroyed)
>
>>>>> you can simply create one with:
>>>>>   # dd if=/dev/zero of=/path/to/somewhere bs=1M count=1024
>>>>>   # losetup /dev/loop0 /path/to/somewhere
>
>>>>> also, no problem to use /mnt or /media/test instead
>>>>> of just /test (i.e. it doesn't matter as long as
>>>>> you specify the path in -M<path>)
>
>>>>> the test script can be found here:
>>>>> http://vserver.13thfloor.at/Stuff/SCRIPT/testfs.sh
>
>> # dd if=/dev/zero of=/mnt/testfs bs=1M count=1024
>> # losetup /dev/loop0 /mnt/testfs
>> # mount -t ext4 /dev/loop0 /mnt/tmp/
>> # testfs.sh -vvv -x -F ext4 -M /mnt/tmp/ -D /dev/loop0
>
> do not mount any filesystem on /mnt/tmp and do not
> mount or busy /dev/loop0 in any way, filesystem
> creation and mounting will be done by testfs.sh

The output follows

best regards
Roberto Puzzanghera


# dd if=/dev/zero of=/usr/local/testfs bs=1M count=1024
# losetup /dev/loop0 /usr/local/testfs
# ./testfs.sh -vvv -x -F ext4 -M /mnt -D /dev/loop0
Linux-VServer FS Test [V0.23] Copyright (C) 2005-2009 H.Poetzl
Linux 3.1.4-vs2.3.2.1-smp x86_64/0.30.216
VCI:  0002:0308 236 13000f11 (ID24)
---
testing ext4 filesystem ...
mke2fs 1.41.14 (22-Dec-2010)
Filesystem label=
OS type: Linux
Block size=4096 (log=2)
Fragment size=4096 (log=2)
Stride=0 blocks, Stripe width=0 blocks
65536 inodes, 262144 blocks
13107 blocks (5.00%) reserved for the super user
First data block=0
Maximum filesystem blocks=268435456
8 block groups
32768 blocks per group, 32768 fragments per group
8192 inodes per group
Superblock backups stored on blocks:
         32768, 98304, 163840, 229376

Writing inode tables: done
Creating journal (8192 blocks): done
Writing superblocks and filesystem accounting information: done

This filesystem will be automatically checked every 24 mounts or
180 days, whichever comes first.  Use tune2fs -c or -i to override.
[000]# succeeded.
         mount -t ext4 -o rw /dev/loop0 /mnt 3>&2
[001]# succeeded.
         mount -o remount,rw,tag /mnt 3>&2
mount: /mnt not mounted already, or bad option
[002]# succeeded.
tag related tests ...
         mount -t ext4 -o rw,tag /dev/loop0 /mnt 3>&2
[011]# succeeded.
         do_tag_touch /mnt 0 1 255 256 666
         touch /mnt/file_1: 0
         vtag --migrate --tag 0 -- touch /mnt/file_1
         touch /mnt/file_2: 1
         vtag --migrate --tag 1 -- touch /mnt/file_2
         touch /mnt/file_3: 255
         vtag --migrate --tag 255 -- touch /mnt/file_3
         touch /mnt/file_4: 256
         vtag --migrate --tag 256 -- touch /mnt/file_4
         touch /mnt/file_5: 666
         vtag --migrate --tag 666 -- touch /mnt/file_5
[012]# succeeded.
         do_tag_verify /mnt 0 1 255 256 666
         verify /mnt/file_1: 0 = 0
         verify /mnt/file_2: 1 = 1
         verify /mnt/file_3: 255 = 255
         verify /mnt/file_4: 256 = 256
         verify /mnt/file_5: 666 = 666
[014]# succeeded.
         do_tag_read /mnt 0 .... 1 ..^. 255 ..^.
cat: /mnt/file_2: Permission denied
cat: /mnt/file_3: Permission denied
[015]# succeeded.
         umount /dev/loop0 3>&2
[019]# succeeded.
         do_tag_verify /mnt 0 1 255 256 666
         verify /mnt/file_1: 0 = 0
         verify /mnt/file_2: 1 = 1
         verify /mnt/file_3: 255 = 255
         verify /mnt/file_4: 256 = 256
         verify /mnt/file_5: 666 = 666
[020]# succeeded.
         mount -o remount,rw,tag /mnt 3>&2
[021]# succeeded.
         do_tag_verify /mnt 0 1 255 256 666
         verify /mnt/file_1: 0 = 0
         verify /mnt/file_2: 1 = 1
         verify /mnt/file_3: 255 = 255
         verify /mnt/file_4: 256 = 256
         verify /mnt/file_5: 666 = 666
[022]# succeeded.
         mount -o remount,rw /mnt 3>&2
[023]# succeeded.
         do_tag_verify /mnt 0 1 255 256 666
         verify /mnt/file_1: 0 = 0
         verify /mnt/file_2: 1 = 1
         verify /mnt/file_3: 255 = 255
         verify /mnt/file_4: 256 = 256
         verify /mnt/file_5: 666 = 666
[024]# succeeded.
         do_tag_read /mnt 0 .... 1 ..^. 255 ..^.
cat: /mnt/file_2: Permission denied
cat: /mnt/file_3: Permission denied
[025]# succeeded.
         do_tag_verify /mnt 0 1 255 256 666
         verify /mnt/file_1: 0 = 0
         verify /mnt/file_2: 1 = 1
         verify /mnt/file_3: 255 = 255
         verify /mnt/file_4: 256 = 256
         verify /mnt/file_5: 666 = 666
[026]# succeeded.
         do_tag_write /mnt 0 .... 1 ..^. 255 ..^.
tee: /mnt/file_2: Permission denied
tee: /mnt/file_3: Permission denied
[027]# succeeded.
         do_tag_verify /mnt 0 1 255 256 666
         verify /mnt/file_1: 0 = 0
         verify /mnt/file_2: 1 = 1
         verify /mnt/file_3: 255 = 255
         verify /mnt/file_4: 256 = 256
         verify /mnt/file_5: 666 = 666
[028]# succeeded.
         do_tag_change /mnt 200 201 256 254 777
         change /mnt/file_1: 200
         change /mnt/file_2: 201
         change /mnt/file_3: 256
         change /mnt/file_4: 254
         change /mnt/file_5: 777
[033]# succeeded.
         do_tag_verify /mnt 200 201 256 254 777
         verify /mnt/file_1: 200 = 200
         verify /mnt/file_2: 201 = 201
         verify /mnt/file_3: 256 = 256
         verify /mnt/file_4: 254 = 254
         verify /mnt/file_5: 777 = 777
[034]# succeeded.
         do_tag_read /mnt 200 ..^.
cat: /mnt/file_1: Permission denied
[035]# succeeded.
         do_tag_write /mnt 200 ..^. 201 ..^.
tee: /mnt/file_1: Permission denied
tee: /mnt/file_2: Permission denied
[037]# succeeded.
         do_tag_read /mnt 200 ....
[045]# succeeded.
         do_tag_write /mnt 200 .... 201 ....
[047]# succeeded.
         do_fsck ext4 /dev/loop0 3>&2
/dev/loop0: 16/65536 files (0.0% non-contiguous), 12638/262144 blocks 

[999]# succeeded.