From: cyjoyp <cyjoyp@gmail.com>
To: xfs@oss.sgi.com
Subject: Reading directory entries from BMAP
Date: Thu, 4 Oct 2007 07:27:19 -0700 (PDT) [thread overview]
Message-ID: <13040897.post@talk.nabble.com> (raw)
Hi there,
I am a beginner in learning XFS file system.. I have a doubt, dont
know whether is silly..If you could help me with this...Thank you..
An extent is 128 bit in size and uses the following struct,
typedef struct xfs_bmbt_irec {
xfs_fileoff_t br_startoff;
xfs_fsblock_t br_startblock;
xfs_filblks_t br_blockcount;
xfs_exntst_t br_state;
}
I have got in to the BMAP position after traversing the BTREE..
The BMAP has a leaf and no other siblings..
I have the extents for directory entries stored in the BMAP..
This is where is struck badly..
Now I have a 16 byte value from which I can calculate the block count
,AG number ,etc...
00 00 00 01 00 00 02 00 00 00 00 00 02 A0 00 02
In this case I lan up some where else instead going to the block of
directory entries..
This br_startoff (logical offset) is causing a difference...I am going
wrong somwhere in this case..
Could you please tell me br_startoff does really mean???
--
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next reply other threads:[~2007-10-04 14:27 UTC|newest]
Thread overview: 4+ messages / expand[flat|nested] mbox.gz Atom feed top
2007-10-04 14:27 cyjoyp [this message]
2007-10-04 16:52 ` Reading directory entries from BMAP Bhagi rathi
2007-10-05 5:16 ` cyjoyp
2007-10-04 23:26 ` David Chinner
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