[PATCH 1/5] f2fs: record total data blocks allocated since mount

[qixiaoyu1 <qxy65535@gmail.com>]

From: xiongping1 <xiongping1@xiaomi.com>

Signed-off-by: xiongping1 <xiongping1@xiaomi.com>
Signed-off-by: qixiaoyu1 <qixiaoyu1@xiaomi.com>
---
 fs/f2fs/Kconfig     |  7 +++++++
 fs/f2fs/Makefile    |  1 +
 fs/f2fs/block_age.c | 28 ++++++++++++++++++++++++++++
 fs/f2fs/debug.c     |  7 +++++++
 fs/f2fs/f2fs.h      | 15 +++++++++++++++
 fs/f2fs/segment.c   |  4 ++++
 fs/f2fs/super.c     |  4 ++++
 7 files changed, 66 insertions(+)
 create mode 100644 fs/f2fs/block_age.c

diff --git a/fs/f2fs/Kconfig b/fs/f2fs/Kconfig
index 03ef087537c7..84915f9c6bc8 100644
--- a/fs/f2fs/Kconfig
+++ b/fs/f2fs/Kconfig
@@ -150,3 +150,10 @@ config F2FS_UNFAIR_RWSEM
 	help
 	  Use unfair rw_semaphore, if system configured IO priority by block
 	  cgroup.
+
+config F2FS_FS_DATA_SEPARATION
+	bool "F2FS hot/cold data separation feature"
+	depends on F2FS_FS
+	help
+	  Enable data blocks separation according to block update frequency.
+
diff --git a/fs/f2fs/Makefile b/fs/f2fs/Makefile
index 8a7322d229e4..70d8f0e23b46 100644
--- a/fs/f2fs/Makefile
+++ b/fs/f2fs/Makefile
@@ -10,3 +10,4 @@ f2fs-$(CONFIG_F2FS_FS_POSIX_ACL) += acl.o
 f2fs-$(CONFIG_FS_VERITY) += verity.o
 f2fs-$(CONFIG_F2FS_FS_COMPRESSION) += compress.o
 f2fs-$(CONFIG_F2FS_IOSTAT) += iostat.o
+f2fs-$(CONFIG_F2FS_FS_DATA_SEPARATION) += block_age.o
diff --git a/fs/f2fs/block_age.c b/fs/f2fs/block_age.c
new file mode 100644
index 000000000000..1e8711a03959
--- /dev/null
+++ b/fs/f2fs/block_age.c
@@ -0,0 +1,28 @@
+// SPDX-License-Identifier: GPL-2.0
+/*
+ * fs/f2fs/block_age.c
+ *
+ * Copyright (c) 2022 xiaomi Co., Ltd.
+ *             http://www.xiaomi.com/
+ */
+#include <linux/fs.h>
+#include <linux/f2fs_fs.h>
+
+#include "f2fs.h"
+#include "segment.h"
+
+static inline void f2fs_inc_data_block_alloc(struct f2fs_sb_info *sbi)
+{
+	atomic64_inc(&sbi->total_data_alloc);
+}
+
+void f2fs_init_block_age_info(struct f2fs_sb_info *sbi)
+{
+	atomic64_set(&sbi->total_data_alloc, 0);
+}
+
+void f2fs_inc_block_alloc_count(struct f2fs_sb_info *sbi, int type)
+{
+	if (IS_DATASEG(type))
+		f2fs_inc_data_block_alloc(sbi);
+}
diff --git a/fs/f2fs/debug.c b/fs/f2fs/debug.c
index a216dcdf6941..d24abdac20bb 100644
--- a/fs/f2fs/debug.c
+++ b/fs/f2fs/debug.c
@@ -81,6 +81,9 @@ static void update_general_status(struct f2fs_sb_info *sbi)
 	si->ext_tree = atomic_read(&sbi->total_ext_tree);
 	si->zombie_tree = atomic_read(&sbi->total_zombie_tree);
 	si->ext_node = atomic_read(&sbi->total_ext_node);
+#ifdef CONFIG_F2FS_FS_DATA_SEPARATION
+	si->total_data_blocks_alloc = atomic64_read(&sbi->total_data_alloc);
+#endif
 	si->ndirty_node = get_pages(sbi, F2FS_DIRTY_NODES);
 	si->ndirty_dent = get_pages(sbi, F2FS_DIRTY_DENTS);
 	si->ndirty_meta = get_pages(sbi, F2FS_DIRTY_META);
@@ -373,6 +376,10 @@ static int stat_show(struct seq_file *s, void *v)
 			seq_printf(s, "Utilization: %u%% (%u valid blocks)\n",
 				si->utilization, si->valid_count);
 
+#ifdef CONFIG_F2FS_FS_DATA_SEPARATION
+		seq_printf(s, "  - Data Block Allocated: %llu\n",
+			   si->total_data_blocks_alloc);
+#endif
 		seq_printf(s, "  - Node: %u (Inode: %u, ",
 			   si->valid_node_count, si->valid_inode_count);
 		seq_printf(s, "Other: %u)\n  - Data: %u\n",
diff --git a/fs/f2fs/f2fs.h b/fs/f2fs/f2fs.h
index e6355a5683b7..686f09846de4 100644
--- a/fs/f2fs/f2fs.h
+++ b/fs/f2fs/f2fs.h
@@ -1807,6 +1807,10 @@ struct f2fs_sb_info {
 	u64 sectors_written_start;
 	u64 kbytes_written;
 
+#ifdef CONFIG_F2FS_FS_DATA_SEPARATION
+	atomic64_t total_data_alloc;
+#endif
+
 	/* Reference to checksum algorithm driver via cryptoapi */
 	struct crypto_shash *s_chksum_driver;
 
@@ -3858,6 +3862,9 @@ struct f2fs_stat_info {
 	int main_area_segs, main_area_sections, main_area_zones;
 	unsigned long long hit_largest, hit_cached, hit_rbtree;
 	unsigned long long hit_total, total_ext;
+#ifdef CONFIG_F2FS_FS_DATA_SEPARATION
+	unsigned long long total_data_blocks_alloc;
+#endif
 	int ext_tree, zombie_tree, ext_node;
 	int ndirty_node, ndirty_dent, ndirty_meta, ndirty_imeta;
 	int ndirty_data, ndirty_qdata;
@@ -4166,6 +4173,14 @@ void f2fs_init_extent_cache_info(struct f2fs_sb_info *sbi);
 int __init f2fs_create_extent_cache(void);
 void f2fs_destroy_extent_cache(void);
 
+#ifdef CONFIG_F2FS_FS_DATA_SEPARATION
+/*
+ * block_age.c
+ */
+void f2fs_init_block_age_info(struct f2fs_sb_info *sbi);
+void f2fs_inc_block_alloc_count(struct f2fs_sb_info *sbi, int type);
+#endif
+
 /*
  * sysfs.c
  */
diff --git a/fs/f2fs/segment.c b/fs/f2fs/segment.c
index acf3d3fa4363..0cf022fd3560 100644
--- a/fs/f2fs/segment.c
+++ b/fs/f2fs/segment.c
@@ -3280,6 +3280,10 @@ void f2fs_allocate_data_block(struct f2fs_sb_info *sbi, struct page *page,
 	locate_dirty_segment(sbi, GET_SEGNO(sbi, old_blkaddr));
 	locate_dirty_segment(sbi, GET_SEGNO(sbi, *new_blkaddr));
 
+#ifdef CONFIG_F2FS_FS_DATA_SEPARATION
+	f2fs_inc_block_alloc_count(sbi, type);
+#endif
+
 	up_write(&sit_i->sentry_lock);
 
 	if (page && IS_NODESEG(type)) {
diff --git a/fs/f2fs/super.c b/fs/f2fs/super.c
index 3834ead04620..bf799d92282a 100644
--- a/fs/f2fs/super.c
+++ b/fs/f2fs/super.c
@@ -4475,6 +4475,10 @@ static int f2fs_fill_super(struct super_block *sb, void *data, int silent)
 
 	f2fs_join_shrinker(sbi);
 
+#ifdef CONFIG_F2FS_FS_DATA_SEPARATION
+	f2fs_init_block_age_info(sbi);
+#endif
+
 	f2fs_tuning_parameters(sbi);
 
 	f2fs_notice(sbi, "Mounted with checkpoint version = %llx",
-- 
2.36.1