[PATCH 1/2] f2fs: clean up with F2FS_BLK_ALIGN

[PATCH 1/2] f2fs: clean up with F2FS_BLK_ALIGN

[Chao Yu]

From: Chao Yu <yuchao0@huawei.com>

Clean up F2FS_BYTES_TO_BLK(x + F2FS_BLKSIZE - 1) with F2FS_BLK_ALIGN(x).

Signed-off-by: Chao Yu <yuchao0@huawei.com>
---
 fs/f2fs/file.c | 3 +--
 fs/f2fs/node.c | 3 +--
 2 files changed, 2 insertions(+), 4 deletions(-)

diff --git a/fs/f2fs/file.c b/fs/f2fs/file.c
index ee88058acd63..8068b015ece5 100644
--- a/fs/f2fs/file.c
+++ b/fs/f2fs/file.c
@@ -573,7 +573,6 @@ static int truncate_partial_data_page(struct inode *inode, u64 from,
 int truncate_blocks(struct inode *inode, u64 from, bool lock)
 {
 	struct f2fs_sb_info *sbi = F2FS_I_SB(inode);
-	unsigned int blocksize = inode->i_sb->s_blocksize;
 	struct dnode_of_data dn;
 	pgoff_t free_from;
 	int count = 0, err = 0;
@@ -582,7 +581,7 @@ int truncate_blocks(struct inode *inode, u64 from, bool lock)
 
 	trace_f2fs_truncate_blocks_enter(inode, from);
 
-	free_from = (pgoff_t)F2FS_BYTES_TO_BLK(from + blocksize - 1);
+	free_from = (pgoff_t)F2FS_BLK_ALIGN(from);
 
 	if (free_from >= sbi->max_file_blocks)
 		goto free_partial;
diff --git a/fs/f2fs/node.c b/fs/f2fs/node.c
index f7886b46478d..ecfc2465da9b 100644
--- a/fs/f2fs/node.c
+++ b/fs/f2fs/node.c
@@ -2581,8 +2581,7 @@ static int __get_nat_bitmaps(struct f2fs_sb_info *sbi)
 	if (!enabled_nat_bits(sbi, NULL))
 		return 0;
 
-	nm_i->nat_bits_blocks = F2FS_BYTES_TO_BLK((nat_bits_bytes << 1) + 8 +
-						F2FS_BLKSIZE - 1);
+	nm_i->nat_bits_blocks = F2FS_BLK_ALIGN((nat_bits_bytes << 1) + 8);
 	nm_i->nat_bits = f2fs_kzalloc(sbi,
 			nm_i->nat_bits_blocks << F2FS_BLKSIZE_BITS, GFP_KERNEL);
 	if (!nm_i->nat_bits)
-- 
2.16.2.17.g38e79b1fd

[PATCH 2/2] f2fs: don't track new nat entry in nat set

[Chao Yu]

From: Chao Yu <yuchao0@huawei.com>

Nat entry set is used only in checkpoint(), and during checkpoint() we
won't flush new nat entry with unallocated address, so we don't need to
add new nat entry into nat set, then nat_entry_set::entry_cnt can
indicate actual entry count we need to flush in checkpoint().

Signed-off-by: Yunlei He <heyunlei@huawei.com>
Signed-off-by: Chao Yu <yuchao0@huawei.com>
---
 fs/f2fs/node.c | 29 +++++++++++++++++++++++++----
 fs/f2fs/node.h |  1 +
 2 files changed, 26 insertions(+), 4 deletions(-)

diff --git a/fs/f2fs/node.c b/fs/f2fs/node.c
index ecfc2465da9b..9a99243054ba 100644
--- a/fs/f2fs/node.c
+++ b/fs/f2fs/node.c
@@ -193,8 +193,8 @@ static void __del_from_nat_cache(struct f2fs_nm_info *nm_i, struct nat_entry *e)
 	__free_nat_entry(e);
 }
 
-static void __set_nat_cache_dirty(struct f2fs_nm_info *nm_i,
-						struct nat_entry *ne)
+static struct nat_entry_set *__grab_nat_entry_set(struct f2fs_nm_info *nm_i,
+							struct nat_entry *ne)
 {
 	nid_t set = NAT_BLOCK_OFFSET(ne->ni.nid);
 	struct nat_entry_set *head;
@@ -209,15 +209,36 @@ static void __set_nat_cache_dirty(struct f2fs_nm_info *nm_i,
 		head->entry_cnt = 0;
 		f2fs_radix_tree_insert(&nm_i->nat_set_root, set, head);
 	}
+	return head;
+}
+
+static void __set_nat_cache_dirty(struct f2fs_nm_info *nm_i,
+						struct nat_entry *ne)
+{
+	struct nat_entry_set *head;
+	bool new_ne = nat_get_blkaddr(ne) == NEW_ADDR;
+
+	if (!new_ne)
+		head = __grab_nat_entry_set(nm_i, ne);
+
+	/*
+	 * update entry_cnt in below condition:
+	 * 1. update NEW_ADDR to valid block address;
+	 * 2. update old block address to new one;
+	 */
+	if (!new_ne && (get_nat_flag(ne, IS_PREALLOC) ||
+				!get_nat_flag(ne, IS_DIRTY)))
+		head->entry_cnt++;
+
+	set_nat_flag(ne, IS_PREALLOC, new_ne);
 
 	if (get_nat_flag(ne, IS_DIRTY))
 		goto refresh_list;
 
 	nm_i->dirty_nat_cnt++;
-	head->entry_cnt++;
 	set_nat_flag(ne, IS_DIRTY, true);
 refresh_list:
-	if (nat_get_blkaddr(ne) == NEW_ADDR)
+	if (new_ne)
 		list_del_init(&ne->list);
 	else
 		list_move_tail(&ne->list, &head->entry_list);
diff --git a/fs/f2fs/node.h b/fs/f2fs/node.h
index e593b4d78be2..b95e49e4a928 100644
--- a/fs/f2fs/node.h
+++ b/fs/f2fs/node.h
@@ -44,6 +44,7 @@ enum {
 	HAS_FSYNCED_INODE,	/* is the inode fsynced before? */
 	HAS_LAST_FSYNC,		/* has the latest node fsync mark? */
 	IS_DIRTY,		/* this nat entry is dirty? */
+	IS_PREALLOC,		/* nat entry is preallocated */
 };
 
 /*
-- 
2.16.2.17.g38e79b1fd