f2fs: enable inline dir handling

Add inline dir functions into normal dir ops' function to handle inline ops.
Besides, we enable inline dir mode when a new dir inode is created if
inline_data option is on.

Signed-off-by: Chao Yu <chao2.yu@samsung.com>
Signed-off-by: Jaegeuk Kim <jaegeuk@kernel.org>

fs/f2fs/dir.c

@@ -201,6 +201,9 @@ struct f2fs_dir_entry *f2fs_find_entry(struct inode *dir,
 	unsigned int max_depth;
 	unsigned int level;
 
+	if (f2fs_has_inline_dentry(dir))
+		return find_in_inline_dir(dir, child, res_page);
+
 	if (npages == 0)
 		return NULL;
 
@@ -227,6 +230,9 @@ struct f2fs_dir_entry *f2fs_parent_dir(struct inode *dir, struct page **p)
 	struct f2fs_dir_entry *de;
 	struct f2fs_dentry_block *dentry_blk;
 
+	if (f2fs_has_inline_dentry(dir))
+		return f2fs_parent_inline_dir(dir, p);
+
 	page = get_lock_data_page(dir, 0);
 	if (IS_ERR(page))
 		return NULL;
@@ -247,7 +253,8 @@ ino_t f2fs_inode_by_name(struct inode *dir, struct qstr *qstr)
 	de = f2fs_find_entry(dir, qstr, &page);
 	if (de) {
 		res = le32_to_cpu(de->ino);
-		kunmap(page);
+		if (!f2fs_has_inline_dentry(dir))
+			kunmap(page);
 		f2fs_put_page(page, 0);
 	}
 
@@ -261,7 +268,8 @@ void f2fs_set_link(struct inode *dir, struct f2fs_dir_entry *de,
 	f2fs_wait_on_page_writeback(page, DATA);
 	de->ino = cpu_to_le32(inode->i_ino);
 	set_de_type(de, inode);
-	kunmap(page);
+	if (!f2fs_has_inline_dentry(dir))
+		kunmap(page);
 	set_page_dirty(page);
 	dir->i_mtime = dir->i_ctime = CURRENT_TIME;
 	mark_inode_dirty(dir);
@@ -303,6 +311,9 @@ static int make_empty_dir(struct inode *inode,
 	struct f2fs_dentry_block *dentry_blk;
 	struct f2fs_dir_entry *de;
 
+	if (f2fs_has_inline_dentry(inode))
+		return make_empty_inline_dir(inode, parent, page);
+
 	dentry_page = get_new_data_page(inode, page, 0, true);
 	if (IS_ERR(dentry_page))
 		return PTR_ERR(dentry_page);
@@ -462,6 +473,14 @@ int __f2fs_add_link(struct inode *dir, const struct qstr *name,
 	int err = 0;
 	int i;
 
+	if (f2fs_has_inline_dentry(dir)) {
+		err = f2fs_add_inline_entry(dir, name, inode);
+		if (!err || err != -EAGAIN)
+			return err;
+		else
+			err = 0;
+	}
+
 	dentry_hash = f2fs_dentry_hash(name);
 	level = 0;
 	current_depth = F2FS_I(dir)->i_current_depth;
@@ -600,6 +619,9 @@ void f2fs_delete_entry(struct f2fs_dir_entry *dentry, struct page *page,
 	int slots = GET_DENTRY_SLOTS(le16_to_cpu(dentry->name_len));
 	int i;
 
+	if (f2fs_has_inline_dentry(dir))
+		return f2fs_delete_inline_entry(dentry, page, dir, inode);
+
 	lock_page(page);
 	f2fs_wait_on_page_writeback(page, DATA);
 
@@ -637,6 +659,9 @@ bool f2fs_empty_dir(struct inode *dir)
 	struct f2fs_dentry_block *dentry_blk;
 	unsigned long nblock = dir_blocks(dir);
 
+	if (f2fs_has_inline_dentry(dir))
+		return f2fs_empty_inline_dir(dir);
+
 	for (bidx = 0; bidx < nblock; bidx++) {
 		dentry_page = get_lock_data_page(dir, bidx);
 		if (IS_ERR(dentry_page)) {
@@ -676,6 +701,9 @@ static int f2fs_readdir(struct file *file, struct dir_context *ctx)
 	unsigned int n = ((unsigned long)ctx->pos / NR_DENTRY_IN_BLOCK);
 	unsigned char d_type = DT_UNKNOWN;
 
+	if (f2fs_has_inline_dentry(inode))
+		return f2fs_read_inline_dir(file, ctx);
+
 	bit_pos = ((unsigned long)ctx->pos % NR_DENTRY_IN_BLOCK);
 
 	/* readahead for multi pages of dir */

fs/f2fs/file.c

@@ -314,7 +314,7 @@ static loff_t f2fs_seek_block(struct file *file, loff_t offset, int whence)
 		goto fail;
 
 	/* handle inline data case */
-	if (f2fs_has_inline_data(inode)) {
+	if (f2fs_has_inline_data(inode) || f2fs_has_inline_dentry(inode)) {
 		if (whence == SEEK_HOLE)
 			data_ofs = isize;
 		goto found;

fs/f2fs/inline.c

@@ -424,7 +424,7 @@ int f2fs_convert_inline_dir(struct inode *dir, struct page *ipage,
 	/* clear inline dir and flag after data writeback */
 	zero_user_segment(ipage, INLINE_DATA_OFFSET,
 				 INLINE_DATA_OFFSET + MAX_INLINE_DATA);
-
+	clear_inode_flag(F2FS_I(dir), FI_INLINE_DENTRY);
 	stat_dec_inline_inode(dir);
 
 	if (i_size_read(dir) < PAGE_CACHE_SIZE) {

fs/f2fs/namei.c

@@ -54,6 +54,10 @@ static struct inode *f2fs_new_inode(struct inode *dir, umode_t mode)
 		nid_free = true;
 		goto out;
 	}
+
+	if (test_opt(sbi, INLINE_DENTRY) && S_ISDIR(inode->i_mode))
+		set_inode_flag(F2FS_I(inode), FI_INLINE_DENTRY);
+
 	trace_f2fs_new_inode(inode, 0);
 	mark_inode_dirty(inode);
 	return inode;
@@ -187,7 +191,8 @@ static struct dentry *f2fs_lookup(struct inode *dir, struct dentry *dentry,
 	de = f2fs_find_entry(dir, &dentry->d_name, &page);
 	if (de) {
 		nid_t ino = le32_to_cpu(de->ino);
-		kunmap(page);
+		if (!f2fs_has_inline_dentry(dir))
+			kunmap(page);
 		f2fs_put_page(page, 0);
 
 		inode = f2fs_iget(dir->i_sb, ino);
@@ -219,7 +224,8 @@ static int f2fs_unlink(struct inode *dir, struct dentry *dentry)
 	err = acquire_orphan_inode(sbi);
 	if (err) {
 		f2fs_unlock_op(sbi);
-		kunmap(page);
+		if (!f2fs_has_inline_dentry(dir))
+			kunmap(page);
 		f2fs_put_page(page, 0);
 		goto fail;
 	}
@@ -443,7 +449,8 @@ static int f2fs_rename(struct inode *old_dir, struct dentry *old_dentry,
 						old_dir_page, new_dir);
 			update_inode_page(old_inode);
 		} else {
-			kunmap(old_dir_page);
+			if (!f2fs_has_inline_dentry(old_inode))
+				kunmap(old_dir_page);
 			f2fs_put_page(old_dir_page, 0);
 		}
 		drop_nlink(old_dir);
@@ -456,15 +463,18 @@ static int f2fs_rename(struct inode *old_dir, struct dentry *old_dentry,
 
 put_out_dir:
 	f2fs_unlock_op(sbi);
-	kunmap(new_page);
+	if (!f2fs_has_inline_dentry(new_dir))
+		kunmap(new_page);
 	f2fs_put_page(new_page, 0);
 out_dir:
 	if (old_dir_entry) {
-		kunmap(old_dir_page);
+		if (!f2fs_has_inline_dentry(old_inode))
+			kunmap(old_dir_page);
 		f2fs_put_page(old_dir_page, 0);
 	}
 out_old:
-	kunmap(old_page);
+	if (!f2fs_has_inline_dentry(old_dir))
+		kunmap(old_page);
 	f2fs_put_page(old_page, 0);
 out:
 	return err;
@@ -596,19 +606,23 @@ out_unlock:
 	f2fs_unlock_op(sbi);
 out_new_dir:
 	if (new_dir_entry) {
-		kunmap(new_dir_page);
+		if (!f2fs_has_inline_dentry(new_inode))
+			kunmap(new_dir_page);
 		f2fs_put_page(new_dir_page, 0);
 	}
 out_old_dir:
 	if (old_dir_entry) {
-		kunmap(old_dir_page);
+		if (!f2fs_has_inline_dentry(old_inode))
+			kunmap(old_dir_page);
 		f2fs_put_page(old_dir_page, 0);
 	}
 out_new:
-	kunmap(new_page);
+	if (!f2fs_has_inline_dentry(new_dir))
+		kunmap(new_page);
 	f2fs_put_page(new_page, 0);
 out_old:
-	kunmap(old_page);
+	if (!f2fs_has_inline_dentry(old_dir))
+		kunmap(old_page);
 	f2fs_put_page(old_page, 0);
 out:
 	return err;

fs/f2fs/recovery.c

@@ -129,7 +129,8 @@ retry:
 	goto out;
 
 out_unmap_put:
-	kunmap(page);
+	if (!f2fs_has_inline_dentry(dir))
+		kunmap(page);
 	f2fs_put_page(page, 0);
 out_err:
 	iput(dir);