f2fs: add undiscard blocks stat
This patch adds to account undiscard blocks.
Signed-off-by: Chao Yu <yuchao0@huawei.com>
diff --git a/fs/f2fs/segment.c b/fs/f2fs/segment.c
index f882716..dd07c5c 100644
--- a/fs/f2fs/segment.c
+++ b/fs/f2fs/segment.c
@@ -695,6 +695,7 @@ static struct discard_cmd *__create_discard_cmd(struct f2fs_sb_info *sbi,
init_completion(&dc->wait);
list_add_tail(&dc->list, pend_list);
atomic_inc(&dcc->discard_cmd_cnt);
+ dcc->undiscard_blks += len;
return dc;
}
@@ -723,6 +724,7 @@ static void __detach_discard_cmd(struct discard_cmd_control *dcc,
list_del(&dc->list);
rb_erase(&dc->rb_node, &dcc->root);
+ dcc->undiscard_blks -= dc->len;
kmem_cache_free(discard_cmd_slab, dc);
@@ -830,8 +832,11 @@ static void __punch_discard_cmd(struct f2fs_sb_info *sbi,
return;
}
+ dcc->undiscard_blks -= di.len;
+
if (blkaddr > di.lstart) {
dc->len = blkaddr - dc->lstart;
+ dcc->undiscard_blks += dc->len;
__relocate_discard_cmd(dcc, dc);
f2fs_bug_on(sbi, !__check_rb_tree_consistence(sbi, &dcc->root));
modified = true;
@@ -849,6 +854,7 @@ static void __punch_discard_cmd(struct f2fs_sb_info *sbi,
dc->lstart++;
dc->len--;
dc->start++;
+ dcc->undiscard_blks += dc->len;
__relocate_discard_cmd(dcc, dc);
f2fs_bug_on(sbi,
!__check_rb_tree_consistence(sbi, &dcc->root));
@@ -910,6 +916,7 @@ static void __update_discard_tree_range(struct f2fs_sb_info *sbi,
prev_dc->bdev == bdev &&
__is_discard_back_mergeable(&di, &prev_dc->di)) {
prev_dc->di.len += di.len;
+ dcc->undiscard_blks += di.len;
__relocate_discard_cmd(dcc, prev_dc);
f2fs_bug_on(sbi,
!__check_rb_tree_consistence(sbi, &dcc->root));
@@ -924,6 +931,7 @@ static void __update_discard_tree_range(struct f2fs_sb_info *sbi,
next_dc->di.lstart = di.lstart;
next_dc->di.len += di.len;
next_dc->di.start = di.start;
+ dcc->undiscard_blks += di.len;
__relocate_discard_cmd(dcc, next_dc);
if (tdc)
__remove_discard_cmd(sbi, tdc);
@@ -1357,6 +1365,7 @@ static int create_discard_cmd_control(struct f2fs_sb_info *sbi)
atomic_set(&dcc->discard_cmd_cnt, 0);
dcc->nr_discards = 0;
dcc->max_discards = 0;
+ dcc->undiscard_blks = 0;
dcc->root = RB_ROOT;
init_waitqueue_head(&dcc->discard_wait_queue);