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Commit fe924415 authored by Tao Ma's avatar Tao Ma Committed by Joel Becker
Browse files

ocfs2: Add refcount b-tree as a new extent tree. 



Add refcount b-tree as a new extent tree so that it can
use the b-tree to store and maniuplate ocfs2_refcount_rec.

Signed-off-by: default avatarTao Ma <tao.ma@oracle.com>
parent 555936bf

fs/ocfs2/alloc.c

+54 −0
Original line number Diff line number Diff line
@@ -385,6 +385,52 @@ static struct ocfs2_extent_tree_operations ocfs2_dx_root_et_ops = { 
	.eo_fill_root_el	= ocfs2_dx_root_fill_root_el,

};



static void ocfs2_refcount_tree_fill_root_el(struct ocfs2_extent_tree *et)

{

	struct ocfs2_refcount_block *rb = et->et_object;



	et->et_root_el = &rb->rf_list;

}



static void ocfs2_refcount_tree_set_last_eb_blk(struct ocfs2_extent_tree *et,

						u64 blkno)

{

	struct ocfs2_refcount_block *rb = et->et_object;



	rb->rf_last_eb_blk = cpu_to_le64(blkno);

}



static u64 ocfs2_refcount_tree_get_last_eb_blk(struct ocfs2_extent_tree *et)

{

	struct ocfs2_refcount_block *rb = et->et_object;



	return le64_to_cpu(rb->rf_last_eb_blk);

}



static void ocfs2_refcount_tree_update_clusters(struct ocfs2_extent_tree *et,

						u32 clusters)

{

	struct ocfs2_refcount_block *rb = et->et_object;



	le32_add_cpu(&rb->rf_clusters, clusters);

}



static enum ocfs2_contig_type

ocfs2_refcount_tree_extent_contig(struct ocfs2_extent_tree *et,

				  struct ocfs2_extent_rec *ext,

				  struct ocfs2_extent_rec *insert_rec)

{

	return CONTIG_NONE;

}



static struct ocfs2_extent_tree_operations ocfs2_refcount_tree_et_ops = {

	.eo_set_last_eb_blk	= ocfs2_refcount_tree_set_last_eb_blk,

	.eo_get_last_eb_blk	= ocfs2_refcount_tree_get_last_eb_blk,

	.eo_update_clusters	= ocfs2_refcount_tree_update_clusters,

	.eo_fill_root_el	= ocfs2_refcount_tree_fill_root_el,

	.eo_extent_contig	= ocfs2_refcount_tree_extent_contig,

};



static void __ocfs2_init_extent_tree(struct ocfs2_extent_tree *et,

				     struct ocfs2_caching_info *ci,

				     struct buffer_head *bh,
@@ -439,6 +485,14 @@ void ocfs2_init_dx_root_extent_tree(struct ocfs2_extent_tree *et, 
				 NULL, &ocfs2_dx_root_et_ops);

}



void ocfs2_init_refcount_extent_tree(struct ocfs2_extent_tree *et,

				     struct ocfs2_caching_info *ci,

				     struct buffer_head *bh)

{

	__ocfs2_init_extent_tree(et, ci, bh, ocfs2_journal_access_rb,

				 NULL, &ocfs2_refcount_tree_et_ops);

}



static inline void ocfs2_et_set_last_eb_blk(struct ocfs2_extent_tree *et,

					    u64 new_last_eb_blk)

{

fs/ocfs2/alloc.h

+3 −0
Original line number Diff line number Diff line
@@ -80,6 +80,9 @@ void ocfs2_init_xattr_value_extent_tree(struct ocfs2_extent_tree *et, 
void ocfs2_init_dx_root_extent_tree(struct ocfs2_extent_tree *et,

				    struct ocfs2_caching_info *ci,

				    struct buffer_head *bh);

void ocfs2_init_refcount_extent_tree(struct ocfs2_extent_tree *et,

				     struct ocfs2_caching_info *ci,

				     struct buffer_head *bh);



/*

 * Read an extent block into *bh.  If *bh is NULL, a bh will be