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author | Tao Ma <tao.ma@oracle.com> | 2008-08-18 17:38:44 +0800 |
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committer | Mark Fasheh <mfasheh@suse.com> | 2008-10-13 13:57:58 -0700 |
commit | e7d4cb6bc19658646357eeff134645cd9bc3479f (patch) | |
tree | 4e24321e5c28fb90dffa1f396972fddb3c458e58 /fs/ocfs2/suballoc.h | |
parent | 811f933df1e55615fd0bb4818f31e3868a8e6e23 (diff) | |
download | linux-3.10-e7d4cb6bc19658646357eeff134645cd9bc3479f.tar.gz linux-3.10-e7d4cb6bc19658646357eeff134645cd9bc3479f.tar.bz2 linux-3.10-e7d4cb6bc19658646357eeff134645cd9bc3479f.zip |
ocfs2: Abstract ocfs2_extent_tree in b-tree operations.
In the old extent tree operation, we take the hypothesis that we
are using the ocfs2_extent_list in ocfs2_dinode as the tree root.
As xattr will also use ocfs2_extent_list to store large value
for a xattr entry, we refactor the tree operation so that xattr
can use it directly.
The refactoring includes 4 steps:
1. Abstract set/get of last_eb_blk and update_clusters since they may
be stored in different location for dinode and xattr.
2. Add a new structure named ocfs2_extent_tree to indicate the
extent tree the operation will work on.
3. Remove all the use of fe_bh and di, use root_bh and root_el in
extent tree instead. So now all the fe_bh is replaced with
et->root_bh, el with root_el accordingly.
4. Make ocfs2_lock_allocators generic. Now it is limited to be only used
in file extend allocation. But the whole function is useful when we want
to store large EAs.
Note: This patch doesn't touch ocfs2_commit_truncate() since it is not used
for anything other than truncate inode data btrees.
Signed-off-by: Tao Ma <tao.ma@oracle.com>
Signed-off-by: Mark Fasheh <mfasheh@suse.com>
Diffstat (limited to 'fs/ocfs2/suballoc.h')
-rw-r--r-- | fs/ocfs2/suballoc.h | 5 |
1 files changed, 5 insertions, 0 deletions
diff --git a/fs/ocfs2/suballoc.h b/fs/ocfs2/suballoc.h index 3f96c875bcf..a3e531e62df 100644 --- a/fs/ocfs2/suballoc.h +++ b/fs/ocfs2/suballoc.h @@ -162,4 +162,9 @@ u64 ocfs2_which_cluster_group(struct inode *inode, u32 cluster); int ocfs2_check_group_descriptor(struct super_block *sb, struct ocfs2_dinode *di, struct ocfs2_group_desc *gd); +int ocfs2_lock_allocators(struct inode *inode, struct buffer_head *root_bh, + struct ocfs2_extent_list *root_el, + u32 clusters_to_add, u32 extents_to_split, + struct ocfs2_alloc_context **data_ac, + struct ocfs2_alloc_context **meta_ac); #endif /* _CHAINALLOC_H_ */ |