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Commit 7ef35e3b authored by Jaegeuk Kim's avatar Jaegeuk Kim
Browse files

f2fs: introduce a flag to represent each nat entry information 



This patch introduces a flag in the nat entry structure to merge various
information such as checkpointed and fsync_done marks.

Signed-off-by: default avatarJaegeuk Kim <jaegeuk@kernel.org>
parent 4c521f49

fs/f2fs/node.c

+7 −6
Original line number Diff line number Diff line
@@ -131,7 +131,7 @@ int is_checkpointed_node(struct f2fs_sb_info *sbi, nid_t nid) 


	read_lock(&nm_i->nat_tree_lock);

	e = __lookup_nat_cache(nm_i, nid);

	if (e && !e->checkpointed)

	if (e && !get_nat_flag(e, IS_CHECKPOINTED))

		is_cp = 0;

	read_unlock(&nm_i->nat_tree_lock);

	return is_cp;
@@ -146,7 +146,7 @@ bool fsync_mark_done(struct f2fs_sb_info *sbi, nid_t nid) 
	read_lock(&nm_i->nat_tree_lock);

	e = __lookup_nat_cache(nm_i, nid);

	if (e)

		fsync_done = e->fsync_done;

		fsync_done = get_nat_flag(e, HAS_FSYNC_MARK);

	read_unlock(&nm_i->nat_tree_lock);

	return fsync_done;

}
@@ -159,7 +159,7 @@ void fsync_mark_clear(struct f2fs_sb_info *sbi, nid_t nid) 
	write_lock(&nm_i->nat_tree_lock);

	e = __lookup_nat_cache(nm_i, nid);

	if (e)

		e->fsync_done = false;

		set_nat_flag(e, HAS_FSYNC_MARK, false);

	write_unlock(&nm_i->nat_tree_lock);

}
@@ -176,7 +176,7 @@ static struct nat_entry *grab_nat_entry(struct f2fs_nm_info *nm_i, nid_t nid) 
	}

	memset(new, 0, sizeof(struct nat_entry));

	nat_set_nid(new, nid);

	new->checkpointed = true;

	set_nat_flag(new, IS_CHECKPOINTED, true);

	list_add_tail(&new->list, &nm_i->nat_entries);

	nm_i->nat_cnt++;

	return new;
@@ -249,7 +249,7 @@ static void set_node_addr(struct f2fs_sb_info *sbi, struct node_info *ni, 
	/* update fsync_mark if its inode nat entry is still alive */

	e = __lookup_nat_cache(nm_i, ni->ino);

	if (e)

		e->fsync_done = fsync_done;

		set_nat_flag(e, HAS_FSYNC_MARK, fsync_done);

	write_unlock(&nm_i->nat_tree_lock);

}
@@ -1349,7 +1349,8 @@ static int add_free_nid(struct f2fs_sb_info *sbi, nid_t nid, bool build) 
		read_lock(&nm_i->nat_tree_lock);

		ne = __lookup_nat_cache(nm_i, nid);

		if (ne &&

			(!ne->checkpointed || nat_get_blkaddr(ne) != NULL_ADDR))

			(!get_nat_flag(ne, IS_CHECKPOINTED) ||

				nat_get_blkaddr(ne) != NULL_ADDR))

			allocated = true;

		read_unlock(&nm_i->nat_tree_lock);

		if (allocated)

fs/f2fs/node.h

+24 −4
Original line number Diff line number Diff line
@@ -39,10 +39,14 @@ struct node_info { 
	unsigned char version;	/* version of the node */

};



enum {

	IS_CHECKPOINTED,	/* is it checkpointed before? */

	HAS_FSYNC_MARK,		/* has the latest node fsync mark? */

};



struct nat_entry {

	struct list_head list;	/* for clean or dirty nat list */

	bool checkpointed;	/* whether it is checkpointed or not */

	bool fsync_done;	/* whether the latest node has fsync mark */

	unsigned char flag;	/* for node information bits */

	struct node_info ni;	/* in-memory node information */

};
@@ -57,16 +61,32 @@ struct nat_entry { 


#define __set_nat_cache_dirty(nm_i, ne)					\

	do {								\

		ne->checkpointed = false;				\

		set_nat_flag(ne, IS_CHECKPOINTED, false);		\

		list_move_tail(&ne->list, &nm_i->dirty_nat_entries);	\

	} while (0)

#define __clear_nat_cache_dirty(nm_i, ne)				\

	do {								\

		ne->checkpointed = true;				\

		set_nat_flag(ne, IS_CHECKPOINTED, true);		\

		list_move_tail(&ne->list, &nm_i->nat_entries);		\

	} while (0)

#define inc_node_version(version)	(++version)



static inline void set_nat_flag(struct nat_entry *ne,

				unsigned int type, bool set)

{

	unsigned char mask = 0x01 << type;

	if (set)

		ne->flag |= mask;

	else

		ne->flag &= ~mask;

}



static inline bool get_nat_flag(struct nat_entry *ne, unsigned int type)

{

	unsigned char mask = 0x01 << type;

	return ne->flag & mask;

}



static inline void node_info_from_raw_nat(struct node_info *ni,

						struct f2fs_nat_entry *raw_ne)

{