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scoutfs: add item count update function

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The item cache maintains a count of the number of dirty items, keys, and
values.  It updates the counts as it dirties and cleans items.  There
are callers who want to modify the accounting directly instead of having
the accounting updated as a side effect of cleaning and re-dirtying the
item.

Signed-off-by: Zach Brown <zab@versity.com>
This commit is contained in:
Zach Brown
2017-09-17 08:48:59 -07:00
committed by Mark Fasheh
parent 7854471475
commit 5325aff698
1 changed files with 15 additions and 10 deletions
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25
kmod/src/item.c
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@@ -307,6 +307,19 @@ static void update_dirty_parents(struct cached_item *item)
scoutfs_item_rb_propagate(rb_parent(&item->node), NULL);
}
static void update_dirty_item_counts(struct super_block *sb, signed items,
signed keys, signed vals)
{
struct scoutfs_sb_info *sbi = SCOUTFS_SB(sb);
struct item_cache *cac = sbi->item_cache;
cac->nr_dirty_items += items;
cac->dirty_key_bytes += keys;
cac->dirty_val_bytes += vals;
scoutfs_trans_track_item(sb, items, keys, vals);
}
static void mark_item_dirty(struct super_block *sb, struct item_cache *cac,
struct cached_item *item)
{
@@ -320,11 +333,7 @@ static void mark_item_dirty(struct super_block *sb, struct item_cache *cac,
list_del_init(&item->entry);
cac->lru_nr--;
cac->nr_dirty_items++;
cac->dirty_key_bytes += item->key->key_len;
cac->dirty_val_bytes += scoutfs_kvec_length(item->val);
scoutfs_trans_track_item(sb, 1, item->key->key_len,
update_dirty_item_counts(sb, 1, item->key->key_len,
scoutfs_kvec_length(item->val));
update_dirty_parents(item);
@@ -343,11 +352,7 @@ static void clear_item_dirty(struct super_block *sb, struct item_cache *cac,
list_add_tail(&item->entry, &cac->lru_list);
cac->lru_nr++;
cac->nr_dirty_items--;
cac->dirty_key_bytes -= item->key->key_len;
cac->dirty_val_bytes -= scoutfs_kvec_length(item->val);
scoutfs_trans_track_item(sb, -1, -item->key->key_len,
update_dirty_item_counts(sb, -1, -item->key->key_len,
-scoutfs_kvec_length(item->val));
WARN_ON_ONCE(cac->nr_dirty_items < 0 || cac->dirty_key_bytes < 0 ||