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ocfs2: CoW a reflinked cluster when it is truncated.

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When we truncate a file to a specific size which resides in a reflinked
cluster, we need to CoW it since ocfs2_zero_range_for_truncate will
zero the space after the size(just another type of write).

So we add a "max_cpos" in ocfs2_refcount_cow so that it will stop when
it hit the max cluster offset.

Signed-off-by: Tao Ma <tao.ma@oracle.com>
This commit is contained in:
Tao Ma
2009-08-26 09:47:28 +08:00
committed by Joel Becker
parent 293b2f70b4
commit 37f8a2bfaa
4 changed files with 70 additions and 14 deletions
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2
fs/ocfs2/refcounttree.h
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@@ -53,5 +53,5 @@ int ocfs2_prepare_refcount_change_for_del(struct inode *inode,
int *credits,
struct ocfs2_alloc_context **meta_ac);
int ocfs2_refcount_cow(struct inode *inode, struct buffer_head *di_bh,
u32 cpos, u32 write_len);
u32 cpos, u32 write_len, u32 max_cpos);
#endif /* OCFS2_REFCOUNTTREE_H */