[f2fs-dev][RFC PATCH 09/10] f2fs: show extent tree,node stat info in debugfs

[Chao Yu <chao2.yu@samsung.com>]

This patch add and show stat info of total memory footprint for extent tree,node
in debugfs.

Signed-off-by: Chao Yu <chao2.yu@samsung.com>
---
 fs/f2fs/debug.c | 7 +++++++
 fs/f2fs/f2fs.h  | 2 +-
 2 files changed, 8 insertions(+), 1 deletion(-)

diff --git a/fs/f2fs/debug.c b/fs/f2fs/debug.c
index 1f0fb58..0fdfffe 100644
--- a/fs/f2fs/debug.c
+++ b/fs/f2fs/debug.c
@@ -35,6 +35,8 @@ static void update_general_status(struct f2fs_sb_info *sbi)
 	/* validation check of the segment numbers */
 	si->hit_ext = sbi->read_hit_ext;
 	si->total_ext = sbi->total_hit_ext;
+	si->ext_tree = sbi->total_ext_tree;
+	si->ext_node = atomic_read(&sbi->total_ext_node);
 	si->ndirty_node = get_pages(sbi, F2FS_DIRTY_NODES);
 	si->ndirty_dent = get_pages(sbi, F2FS_DIRTY_DENTS);
 	si->ndirty_dirs = sbi->n_dirty_dirs;
@@ -177,6 +179,9 @@ get_cache:
 	si->cache_mem += sbi->n_dirty_dirs * sizeof(struct inode_entry);
 	for (i = 0; i <= UPDATE_INO; i++)
 		si->cache_mem += sbi->im[i].ino_num * sizeof(struct ino_entry);
+	si->cache_mem += sbi->total_ext_tree * sizeof(struct extent_tree);
+	si->cache_mem += atomic_read(&sbi->total_ext_node) *
+						sizeof(struct extent_node);
 }
 
 static int stat_show(struct seq_file *s, void *v)
@@ -253,6 +258,8 @@ static int stat_show(struct seq_file *s, void *v)
 		seq_printf(s, "  - node blocks : %d\n", si->node_blks);
 		seq_printf(s, "\nExtent Hit Ratio: %d / %d\n",
 			   si->hit_ext, si->total_ext);
+		seq_printf(s, "\nExtent Tree Count: %d\n", si->ext_tree);
+		seq_printf(s, "\nExtent Node Count: %d\n", si->ext_node);
 		seq_puts(s, "\nBalancing F2FS Async:\n");
 		seq_printf(s, "  - inmem: %4d\n",
 			   si->inmem_pages);
diff --git a/fs/f2fs/f2fs.h b/fs/f2fs/f2fs.h
index 811fd90..c5138fc 100644
--- a/fs/f2fs/f2fs.h
+++ b/fs/f2fs/f2fs.h
@@ -1540,7 +1540,7 @@ struct f2fs_stat_info {
 	struct f2fs_sb_info *sbi;
 	int all_area_segs, sit_area_segs, nat_area_segs, ssa_area_segs;
 	int main_area_segs, main_area_sections, main_area_zones;
-	int hit_ext, total_ext;
+	int hit_ext, total_ext, ext_tree, ext_node;
 	int ndirty_node, ndirty_dent, ndirty_dirs, ndirty_meta;
 	int nats, dirty_nats, sits, dirty_sits, fnids;
 	int total_count, utilization;
-- 
2.2.1