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Commit 853a3a14 authored by Tao Ma's avatar Tao Ma Committed by Joel Becker
Browse files

ocfs2: Wrap ocfs2_extent_contig in ocfs2_extent_tree. 



Add a new operation eo_ocfs2_extent_contig int the extent tree's
operations vector. So that with the new refcount tree, We want
this so that refcount trees can always return CONTIG_NONE and
prevent extent merging.

Signed-off-by: default avatarTao Ma <tao.ma@oracle.com>
parent 8bf396de

fs/ocfs2/alloc.c

+41 −16
Original line number Diff line number Diff line
@@ -52,7 +52,17 @@ 


#include "buffer_head_io.h"



enum ocfs2_contig_type {

	CONTIG_NONE = 0,

	CONTIG_LEFT,

	CONTIG_RIGHT,

	CONTIG_LEFTRIGHT,

};



static enum ocfs2_contig_type

	ocfs2_extent_rec_contig(struct super_block *sb,

				struct ocfs2_extent_rec *ext,

				struct ocfs2_extent_rec *insert_rec);

/*

 * Operations for a specific extent tree type.

 *
@@ -122,6 +132,16 @@ struct ocfs2_extent_tree_operations { 
	 * to 0 (unlimited).  Optional.

	 */

	void (*eo_fill_max_leaf_clusters)(struct ocfs2_extent_tree *et);



	/*

	 * ->eo_extent_contig test whether the 2 ocfs2_extent_rec

	 * are contiguous or not. Optional. Don't need to set it if use

	 * ocfs2_extent_rec as the tree leaf.

	 */

	enum ocfs2_contig_type

		(*eo_extent_contig)(struct ocfs2_extent_tree *et,

				    struct ocfs2_extent_rec *ext,

				    struct ocfs2_extent_rec *insert_rec);

};
@@ -458,6 +478,19 @@ static inline int ocfs2_et_root_journal_access(handle_t *handle, 
					  type);

}



static inline enum ocfs2_contig_type

	ocfs2_et_extent_contig(struct ocfs2_extent_tree *et,

			       struct ocfs2_extent_rec *rec,

			       struct ocfs2_extent_rec *insert_rec)

{

	if (et->et_ops->eo_extent_contig)

		return et->et_ops->eo_extent_contig(et, rec, insert_rec);



	return ocfs2_extent_rec_contig(

				ocfs2_metadata_cache_get_super(et->et_ci),

				rec, insert_rec);

}



static inline int ocfs2_et_insert_check(struct ocfs2_extent_tree *et,

					struct ocfs2_extent_rec *rec)

{
@@ -736,17 +769,9 @@ int ocfs2_search_extent_list(struct ocfs2_extent_list *el, u32 v_cluster) 
	return ret;

}



enum ocfs2_contig_type {

	CONTIG_NONE = 0,

	CONTIG_LEFT,

	CONTIG_RIGHT,

	CONTIG_LEFTRIGHT,

};





/*

 * NOTE: ocfs2_block_extent_contig(), ocfs2_extents_adjacent() and

 * ocfs2_extent_contig only work properly against leaf nodes!

 * ocfs2_extent_rec_contig only work properly against leaf nodes!

 */

static int ocfs2_block_extent_contig(struct super_block *sb,

				     struct ocfs2_extent_rec *ext,
@@ -772,7 +797,7 @@ static int ocfs2_extents_adjacent(struct ocfs2_extent_rec *left, 
}



static enum ocfs2_contig_type

	ocfs2_extent_contig(struct super_block *sb,

	ocfs2_extent_rec_contig(struct super_block *sb,

				struct ocfs2_extent_rec *ext,

				struct ocfs2_extent_rec *insert_rec)

{
@@ -4400,7 +4425,7 @@ ocfs2_figure_merge_contig_type(struct ocfs2_extent_tree *et, 
			if (split_rec->e_cpos == el->l_recs[index].e_cpos)

				ret = CONTIG_RIGHT;

		} else {

			ret = ocfs2_extent_contig(sb, rec, split_rec);

			ret = ocfs2_et_extent_contig(et, rec, split_rec);

		}

	}
@@ -4445,7 +4470,7 @@ ocfs2_figure_merge_contig_type(struct ocfs2_extent_tree *et, 
	if (rec) {

		enum ocfs2_contig_type contig_type;



		contig_type = ocfs2_extent_contig(sb, rec, split_rec);

		contig_type = ocfs2_et_extent_contig(et, rec, split_rec);



		if (contig_type == CONTIG_LEFT && ret == CONTIG_RIGHT)

			ret = CONTIG_LEFTRIGHT;
@@ -4473,8 +4498,8 @@ static void ocfs2_figure_contig_type(struct ocfs2_extent_tree *et, 
	BUG_ON(le16_to_cpu(el->l_tree_depth) != 0);



	for(i = 0; i < le16_to_cpu(el->l_next_free_rec); i++) {

		contig_type = ocfs2_extent_contig(ocfs2_metadata_cache_get_super(et->et_ci),

						  &el->l_recs[i], insert_rec);

		contig_type = ocfs2_et_extent_contig(et, &el->l_recs[i],

						     insert_rec);

		if (contig_type != CONTIG_NONE) {

			insert->ins_contig_index = i;

			break;