/* Called from locking and called from ocfs2_clear_inode. Dump the
* cache for a given inode.
*
* This function is a few more lines longer than necessary due to some
* accounting done here, but I think it's worth tracking down those
* bugs sooner -- Mark */
void ocfs2_metadata_cache_purge(struct ocfs2_caching_info *ci)
{
unsigned int tree, to_purge, purged;
struct rb_root root = RB_ROOT;
BUG_ON(!ci || !ci->ci_ops);
ocfs2_metadata_cache_lock(ci);
tree = !(ci->ci_flags & OCFS2_CACHE_FL_INLINE);
to_purge = ci->ci_num_cached;
trace_ocfs2_metadata_cache_purge(
(unsigned long long)ocfs2_metadata_cache_owner(ci),
to_purge, tree);
/* If we're a tree, save off the root so that we can safely
* initialize the cache. We do the work to free tree members
* without the spinlock. */
if (tree)
root = ci->ci_cache.ci_tree;
ocfs2_metadata_cache_reset(ci, 0);
ocfs2_metadata_cache_unlock(ci);
purged = ocfs2_purge_copied_metadata_tree(&root);
/* If possible, track the number wiped so that we can more
* easily detect counting errors. Unfortunately, this is only
* meaningful for trees. */
if (tree && purged != to_purge)
mlog(ML_ERROR, "Owner %llu, count = %u, purged = %u\n",
(unsigned long long)ocfs2_metadata_cache_owner(ci),
to_purge, purged);
}
static int ocfs2_buffer_cached(struct ocfs2_caching_info *ci,
struct buffer_head *bh)
{
int index = -1;
struct ocfs2_meta_cache_item *item = NULL;
ocfs2_metadata_cache_lock(ci);
trace_ocfs2_buffer_cached_begin(
(unsigned long long)ocfs2_metadata_cache_owner(ci),
(unsigned long long) bh->b_blocknr,
!!(ci->ci_flags & OCFS2_CACHE_FL_INLINE));
if (ci->ci_flags & OCFS2_CACHE_FL_INLINE)
index = ocfs2_search_cache_array(ci, bh->b_blocknr);
else
item = ocfs2_search_cache_tree(ci, bh->b_blocknr);
ocfs2_metadata_cache_unlock(ci);
trace_ocfs2_buffer_cached_end(index, item);
return (index != -1) || (item != NULL);
}
static int ocfs2_buffer_cached(struct ocfs2_caching_info *ci,
struct buffer_head *bh)
{
int index = -1;
struct ocfs2_meta_cache_item *item = NULL;
ocfs2_metadata_cache_lock(ci);
mlog(0, "Owner %llu, query block %llu (inline = %u)\n",
(unsigned long long)ocfs2_metadata_cache_owner(ci),
(unsigned long long) bh->b_blocknr,
!!(ci->ci_flags & OCFS2_CACHE_FL_INLINE));
if (ci->ci_flags & OCFS2_CACHE_FL_INLINE)
index = ocfs2_search_cache_array(ci, bh->b_blocknr);
else
item = ocfs2_search_cache_tree(ci, bh->b_blocknr);
ocfs2_metadata_cache_unlock(ci);
mlog(0, "index = %d, item = %p\n", index, item);
return (index != -1) || (item != NULL);
}
