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ocfs2: Wrap ocfs2_extent_contig in ocfs2_extent_tree.

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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: Tao Ma <tao.ma@oracle.com>
This commit is contained in:
Tao Ma 2009-08-18 11:22:18 +08:00 • committed by Joel Becker
parent 8bf396de98
commit 853a3a1439
1 changed files with 41 additions and 16 deletions
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57
fs/ocfs2/alloc.c
View file

@ -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,
@ -772,9 +797,9 @@ static int ocfs2_extents_adjacent(struct ocfs2_extent_rec *left,
}
static enum ocfs2_contig_type
ocfs2_extent_contig(struct super_block *sb,
struct ocfs2_extent_rec *ext,
struct ocfs2_extent_rec *insert_rec)
ocfs2_extent_rec_contig(struct super_block *sb,
struct ocfs2_extent_rec *ext,
struct ocfs2_extent_rec *insert_rec)
{
u64 blkno = le64_to_cpu(insert_rec->e_blkno);
@ -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;