Re: [PATCH v4 2/2] btrfs-progs: cmds: Add subcommand that dumps file extents

[Qu Wenruo <quwenruo.btrfs@gmx.com>]

On 2021/8/19 下午2:03, Qu Wenruo wrote:
>
>
> On 2021/8/18 上午8:38, Sidong Yang wrote:
>> On Tue, Aug 17, 2021 at 03:30:22PM +0200, David Sterba wrote:
>>> On Sun, Jul 18, 2021 at 06:46:01AM +0000, Sidong Yang wrote:
>>>> This patch adds an subcommand in inspect-internal. It dumps file
>>>> extents of
>>>> the file that user provided. It helps to show the internal information
>>>> about file extents comprise the file.
>>>
>>> Do you have an example of the output? That's the most interesting part.
>>> Thanks.
>>
>> Thanks for reply.
>> This is an example of the output below.
>>
>> # ./btrfs inspect-internal dump-file-extent /mnt/test1
>> type = regular, start = 2097152, len = 3227648, disk_bytenr = 0,
>> disk_num_bytes = 0, offset = 0, compression = none
>> type = regular, start = 5324800, len = 16728064, disk_bytenr = 0,
>> disk_num_bytes = 0, offset = 0, compression = none
>> type = regular, start = 22052864, len = 8486912, disk_bytenr = 0,
>> disk_num_bytes = 0, offset = 0, compression = none
>> type = regular, start = 30572544, len = 36540416, disk_bytenr = 0,
>> disk_num_bytes = 0, offset = 0, compression = none
>> type = regular, start = 67112960, len = 5299630080, disk_bytenr = 0,
>> disk_num_bytes = 0, offset = 0, compression = none
>
> Could you give an example which includes both real (non-hole) extents
> and real extents (better to include regular, compressed, preallocated
> and inline).

Tons of typos... I mean to include both holes (like the existing
example) and non-holes extents...

>
> Currently the output only contains holes, and for holes, a lot of
> members makes no sense, like disk_bytenr/disk_num_bytes/offset (even it
> can be non-zero) and compression.
>
> Thanks,
> Qu
>
>>
>> Thanks,
>> Sidong
>>