Re: Some questions about XFS design

[unDEFER <undefer@xxxxxxxxx>]

В письме от Mon, 17 Apr 2006 19:07:28 +0400, unDEFER <undefer@xxxxxxxxx> 
сообщал:

Sorry for bad formatting in prevision message.

***Start of dxfs_dinode structure***
***Start of di_core structure***

            +-- di_magic ('IN')
            |
            |     +-- di_mode (it is regular file)
            |     |
            |     |   +-- di_version
            |     |   |
            |     |   |  +-- di_format (XFS_DINODE_FMT_BTREE)
            |     |   |  |
          +---+ +---+ ++ ++
00008400  49 4e 81 a4 01 03 00 01  00 00 01 f4 00 00 01 f5  |IN ╓.......Т...У|
00008410  00 00 00 01 00 00 00 00  00 00 00 00 00 00 00 e5  |...............Е|
00008420  44 3a 80 d7 1e 54 43 d0  41 e8 68 9a 00 00 00 00  |D: в.TCпAХh ....|
00008430  42 1b 7d 18 2c d5 ec 08  00 00 00 00 27 c0 04 00  |B.}.,уЛ.....'ю..|

                                                 +-- di_nextents (10 extents)
                                                 |
                                               +---------+
00008440  00 00 00 00 00 02 7c 02  00 00 00 00 00 00 00 0a  |......|.........|
00008450  00 00 00 02 00 00 00 00  00 00 00 00 00 00 00 0e  |................|
***End of di_core structure***

            +-- di_next_unlinked (it is not unlinked file)
            |
            |           +-- bb_level of xfs_bmdr_block_t structure???
            |           |
            |           |     +-- bb_numrecs of xfs_bmdr_block_t structure???
            |           |     |
            |           |     |      +-- Why we have zeroes here?
            |           |     |      |
          +---------+ +---+ +---+  +---------------------+
00008460  ff ff ff ff 00 01 00 01  00 00 00 00 00 00 00 00  |ЪЪЪЪ............|

!!! Here we have piece of old data of extent list. Why??? !!!
00008470  e5 a1 c8 00 00 00 00 00  03 90 00 00 00 00 00 8d  |Е║х...... ..... |
00008480  41 a0 11 40 00 00 00 00  03 b2 80 00 00 00 00 91  |A .@.....╡ .... |
00008490  e1 a0 12 e0 00 00 00 00  03 d8 40 00 00 00 00 96  |А .Ю.....ь@.... |
000084a0  ad a0 14 60 00 00 00 00  04 01 00 00 00 00 00 9c  |╜ .`........... |
!!! End if piece of old data of extent list !!!

            +-- It is seems, 64 bit link to btree block.
            |
          +---------------------+
000084b0  00 00 00 00 00 05 e0 6f  00 00 00 00 00 00 00 00  |......Юo........|
000084c0  00 00 00 00 00 00 00 00  00 00 00 00 00 00 00 00  |................|
000084d0  00 00 00 00 00 00 00 00  00 00 00 00 00 00 00 00  |................|
000084e0  00 00 00 00 00 00 00 00  00 00 00 00 00 00 00 00  |................|
000084f0  00 00 00 00 00 00 00 00  00 00 00 00 00 00 00 00  |................|
***End of Inode***


--
registered Linux user #360474
Don't worry, I can read OpenOffice.org