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ocfs2: Make truncating the extent map an extent_tree_operation. 

ocfs2_remove_extent() wants to truncate the extent map if it's
truncating an inode data extent.  But since many btrees can call that
function, let's make it an op on ocfs2_extent_tree.  Other tree types
can leave it empty.

Signed-off-by: Joel Becker <joel.becker@oracle.com>
This commit is contained in:
Joel Becker 2009-02-13 02:50:12 -08:00
parent 043beebb6c
commit 4c911eefca
1 changed files with 31 additions and 6 deletions
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37
fs/ocfs2/alloc.c
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@ -82,6 +82,13 @@ struct ocfs2_extent_tree_operations {
void (*eo_update_clusters)(struct ocfs2_extent_tree *et,
u32 new_clusters);
/*
* If this extent tree is supported by an extent map, truncate the
* map to clusters,
*/
void (*eo_extent_map_truncate)(struct ocfs2_extent_tree *et,
u32 clusters);
/*
* If ->eo_insert_check() exists, it is called before rec is
* inserted into the extent tree. It is optional.
@ -120,6 +127,8 @@ static void ocfs2_dinode_set_last_eb_blk(struct ocfs2_extent_tree *et,
u64 blkno);
static void ocfs2_dinode_update_clusters(struct ocfs2_extent_tree *et,
u32 clusters);
static void ocfs2_dinode_extent_map_truncate(struct ocfs2_extent_tree *et,
u32 clusters);
static int ocfs2_dinode_insert_check(struct ocfs2_extent_tree *et,
struct ocfs2_extent_rec *rec);
static int ocfs2_dinode_sanity_check(struct ocfs2_extent_tree *et);
@ -128,6 +137,7 @@ static struct ocfs2_extent_tree_operations ocfs2_dinode_et_ops = {
.eo_set_last_eb_blk = ocfs2_dinode_set_last_eb_blk,
.eo_get_last_eb_blk = ocfs2_dinode_get_last_eb_blk,
.eo_update_clusters = ocfs2_dinode_update_clusters,
.eo_extent_map_truncate = ocfs2_dinode_extent_map_truncate,
.eo_insert_check = ocfs2_dinode_insert_check,
.eo_sanity_check = ocfs2_dinode_sanity_check,
.eo_fill_root_el = ocfs2_dinode_fill_root_el,
@ -162,6 +172,14 @@ static void ocfs2_dinode_update_clusters(struct ocfs2_extent_tree *et,
spin_unlock(&oi->ip_lock);
}
static void ocfs2_dinode_extent_map_truncate(struct ocfs2_extent_tree *et,
u32 clusters)
{
struct inode *inode = &cache_info_to_inode(et->et_ci)->vfs_inode;
ocfs2_extent_map_trunc(inode, clusters);
}
static int ocfs2_dinode_insert_check(struct ocfs2_extent_tree *et,
struct ocfs2_extent_rec *rec)
{
@ -400,6 +418,13 @@ static inline void ocfs2_et_update_clusters(struct ocfs2_extent_tree *et,
et->et_ops->eo_update_clusters(et, clusters);
}
static inline void ocfs2_et_extent_map_truncate(struct ocfs2_extent_tree *et,
u32 clusters)
{
if (et->et_ops->eo_extent_map_truncate)
et->et_ops->eo_extent_map_truncate(et, clusters);
}
static inline int ocfs2_et_root_journal_access(handle_t *handle,
struct ocfs2_extent_tree *et,
int type)
@ -5106,12 +5131,8 @@ int ocfs2_mark_extent_written(struct inode *inode,
/*
* XXX: This should be fixed up so that we just re-insert the
* next extent records.
*
* XXX: This is a hack on the extent tree, maybe it should be
* an op?
*/
if (et->et_ops == &ocfs2_dinode_et_ops)
ocfs2_extent_map_trunc(inode, 0);
ocfs2_et_extent_map_truncate(et, 0);
left_path = ocfs2_new_path_from_et(et);
if (!left_path) {
@ -5393,7 +5414,11 @@ int ocfs2_remove_extent(struct inode *inode,
struct ocfs2_extent_list *el;
struct ocfs2_path *path = NULL;
ocfs2_extent_map_trunc(inode, 0);
/*
* XXX: Why are we truncating to 0 instead of wherever this
* affects us?
*/
ocfs2_et_extent_map_truncate(et, 0);
path = ocfs2_new_path_from_et(et);
if (!path) {