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ocfs2/xattr: fix credits calculation during index create

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When creating a xattr index block, the old calculation forget
to add credits for the meta change of the alloc file. So add
more credits and more comments to explain it.

Signed-off-by: Tao Ma <tao.ma@oracle.com>
Signed-off-by: Mark Fasheh <mfasheh@suse.com>
This commit is contained in:
Tao Ma 2008-12-05 06:20:56 +08:00 committed by Mark Fasheh
parent 4b3f6209bf
commit 90cb546cad
1 changed files with 9 additions and 1 deletions
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10
fs/ocfs2/xattr.c
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@ -2359,13 +2359,21 @@ static int ocfs2_calc_xattr_set_need(struct inode *inode,
} else
xb = (struct ocfs2_xattr_block *)xbs->xattr_bh->b_data;
/*
* If there is already an xattr tree, good, we can calculate
* like other b-trees. Otherwise we may have the chance of
* create a tree, the credit calculation is borrowed from
* ocfs2_calc_extend_credits with root_el = NULL. And the
* new tree will be cluster based, so no meta is needed.
*/
if (le16_to_cpu(xb->xb_flags) & OCFS2_XATTR_INDEXED) {
struct ocfs2_extent_list *el =
&xb->xb_attrs.xb_root.xt_list;
meta_add += ocfs2_extend_meta_needed(el);
credits += ocfs2_calc_extend_credits(inode->i_sb,
el, 1);
}
} else
credits += OCFS2_SUBALLOC_ALLOC + 1;
/*
* This cluster will be used either for new bucket or for