1 files changed, 815 insertions, 0 deletions

diff --git a/fs/f2fs/inline.c b/fs/f2fs/inline.c
new file mode 100644
index 000000000..8747eec3d
--- /dev/null
+++ b/fs/f2fs/inline.c
@@ -0,0 +1,815 @@
+// SPDX-License-Identifier: GPL-2.0
+/*
+ * fs/f2fs/inline.c
+ * Copyright (c) 2013, Intel Corporation
+ * Authors: Huajun Li <huajun.li@intel.com>
+ *          Haicheng Li <haicheng.li@intel.com>
+ */
+
+#include <linux/fs.h>
+#include <linux/f2fs_fs.h>
+#include <linux/fiemap.h>
+
+#include "f2fs.h"
+#include "node.h"
+#include <trace/events/f2fs.h>
+
+static bool support_inline_data(struct inode *inode)
+{
+	if (f2fs_is_atomic_file(inode))
+		return false;
+	if (!S_ISREG(inode->i_mode) && !S_ISLNK(inode->i_mode))
+		return false;
+	if (i_size_read(inode) > MAX_INLINE_DATA(inode))
+		return false;
+	return true;
+}
+
+bool f2fs_may_inline_data(struct inode *inode)
+{
+	if (!support_inline_data(inode))
+		return false;
+
+	return !f2fs_post_read_required(inode);
+}
+
+bool f2fs_sanity_check_inline_data(struct inode *inode)
+{
+	if (!f2fs_has_inline_data(inode))
+		return false;
+
+	if (!support_inline_data(inode))
+		return true;
+
+	/*
+	 * used by sanity_check_inode(), when disk layout fields has not
+	 * been synchronized to inmem fields.
+	 */
+	return (S_ISREG(inode->i_mode) &&
+		(file_is_encrypt(inode) || file_is_verity(inode) ||
+		(F2FS_I(inode)->i_flags & F2FS_COMPR_FL)));
+}
+
+bool f2fs_may_inline_dentry(struct inode *inode)
+{
+	if (!test_opt(F2FS_I_SB(inode), INLINE_DENTRY))
+		return false;
+
+	if (!S_ISDIR(inode->i_mode))
+		return false;
+
+	return true;
+}
+
+void f2fs_do_read_inline_data(struct page *page, struct page *ipage)
+{
+	struct inode *inode = page->mapping->host;
+
+	if (PageUptodate(page))
+		return;
+
+	f2fs_bug_on(F2FS_P_SB(page), page->index);
+
+	zero_user_segment(page, MAX_INLINE_DATA(inode), PAGE_SIZE);
+
+	/* Copy the whole inline data block */
+	memcpy_to_page(page, 0, inline_data_addr(inode, ipage),
+		       MAX_INLINE_DATA(inode));
+	if (!PageUptodate(page))
+		SetPageUptodate(page);
+}
+
+void f2fs_truncate_inline_inode(struct inode *inode,
+					struct page *ipage, u64 from)
+{
+	void *addr;
+
+	if (from >= MAX_INLINE_DATA(inode))
+		return;
+
+	addr = inline_data_addr(inode, ipage);
+
+	f2fs_wait_on_page_writeback(ipage, NODE, true, true);
+	memset(addr + from, 0, MAX_INLINE_DATA(inode) - from);
+	set_page_dirty(ipage);
+
+	if (from == 0)
+		clear_inode_flag(inode, FI_DATA_EXIST);
+}
+
+int f2fs_read_inline_data(struct inode *inode, struct page *page)
+{
+	struct page *ipage;
+
+	ipage = f2fs_get_node_page(F2FS_I_SB(inode), inode->i_ino);
+	if (IS_ERR(ipage)) {
+		unlock_page(page);
+		return PTR_ERR(ipage);
+	}
+
+	if (!f2fs_has_inline_data(inode)) {
+		f2fs_put_page(ipage, 1);
+		return -EAGAIN;
+	}
+
+	if (page->index)
+		zero_user_segment(page, 0, PAGE_SIZE);
+	else
+		f2fs_do_read_inline_data(page, ipage);
+
+	if (!PageUptodate(page))
+		SetPageUptodate(page);
+	f2fs_put_page(ipage, 1);
+	unlock_page(page);
+	return 0;
+}
+
+int f2fs_convert_inline_page(struct dnode_of_data *dn, struct page *page)
+{
+	struct f2fs_io_info fio = {
+		.sbi = F2FS_I_SB(dn->inode),
+		.ino = dn->inode->i_ino,
+		.type = DATA,
+		.op = REQ_OP_WRITE,
+		.op_flags = REQ_SYNC | REQ_PRIO,
+		.page = page,
+		.encrypted_page = NULL,
+		.io_type = FS_DATA_IO,
+	};
+	struct node_info ni;
+	int dirty, err;
+
+	if (!f2fs_exist_data(dn->inode))
+		goto clear_out;
+
+	err = f2fs_reserve_block(dn, 0);
+	if (err)
+		return err;
+
+	err = f2fs_get_node_info(fio.sbi, dn->nid, &ni, false);
+	if (err) {
+		f2fs_truncate_data_blocks_range(dn, 1);
+		f2fs_put_dnode(dn);
+		return err;
+	}
+
+	fio.version = ni.version;
+
+	if (unlikely(dn->data_blkaddr != NEW_ADDR)) {
+		f2fs_put_dnode(dn);
+		set_sbi_flag(fio.sbi, SBI_NEED_FSCK);
+		f2fs_warn(fio.sbi, "%s: corrupted inline inode ino=%lx, i_addr[0]:0x%x, run fsck to fix.",
+			  __func__, dn->inode->i_ino, dn->data_blkaddr);
+		f2fs_handle_error(fio.sbi, ERROR_INVALID_BLKADDR);
+		return -EFSCORRUPTED;
+	}
+
+	f2fs_bug_on(F2FS_P_SB(page), PageWriteback(page));
+
+	f2fs_do_read_inline_data(page, dn->inode_page);
+	set_page_dirty(page);
+
+	/* clear dirty state */
+	dirty = clear_page_dirty_for_io(page);
+
+	/* write data page to try to make data consistent */
+	set_page_writeback(page);
+	ClearPageError(page);
+	fio.old_blkaddr = dn->data_blkaddr;
+	set_inode_flag(dn->inode, FI_HOT_DATA);
+	f2fs_outplace_write_data(dn, &fio);
+	f2fs_wait_on_page_writeback(page, DATA, true, true);
+	if (dirty) {
+		inode_dec_dirty_pages(dn->inode);
+		f2fs_remove_dirty_inode(dn->inode);
+	}
+
+	/* this converted inline_data should be recovered. */
+	set_inode_flag(dn->inode, FI_APPEND_WRITE);
+
+	/* clear inline data and flag after data writeback */
+	f2fs_truncate_inline_inode(dn->inode, dn->inode_page, 0);
+	clear_page_private_inline(dn->inode_page);
+clear_out:
+	stat_dec_inline_inode(dn->inode);
+	clear_inode_flag(dn->inode, FI_INLINE_DATA);
+	f2fs_put_dnode(dn);
+	return 0;
+}
+
+int f2fs_convert_inline_inode(struct inode *inode)
+{
+	struct f2fs_sb_info *sbi = F2FS_I_SB(inode);
+	struct dnode_of_data dn;
+	struct page *ipage, *page;
+	int err = 0;
+
+	if (!f2fs_has_inline_data(inode) ||
+			f2fs_hw_is_readonly(sbi) || f2fs_readonly(sbi->sb))
+		return 0;
+
+	err = f2fs_dquot_initialize(inode);
+	if (err)
+		return err;
+
+	page = f2fs_grab_cache_page(inode->i_mapping, 0, false);
+	if (!page)
+		return -ENOMEM;
+
+	f2fs_lock_op(sbi);
+
+	ipage = f2fs_get_node_page(sbi, inode->i_ino);
+	if (IS_ERR(ipage)) {
+		err = PTR_ERR(ipage);
+		goto out;
+	}
+
+	set_new_dnode(&dn, inode, ipage, ipage, 0);
+
+	if (f2fs_has_inline_data(inode))
+		err = f2fs_convert_inline_page(&dn, page);
+
+	f2fs_put_dnode(&dn);
+out:
+	f2fs_unlock_op(sbi);
+
+	f2fs_put_page(page, 1);
+
+	if (!err)
+		f2fs_balance_fs(sbi, dn.node_changed);
+
+	return err;
+}
+
+int f2fs_write_inline_data(struct inode *inode, struct page *page)
+{
+	struct dnode_of_data dn;
+	int err;
+
+	set_new_dnode(&dn, inode, NULL, NULL, 0);
+	err = f2fs_get_dnode_of_data(&dn, 0, LOOKUP_NODE);
+	if (err)
+		return err;
+
+	if (!f2fs_has_inline_data(inode)) {
+		f2fs_put_dnode(&dn);
+		return -EAGAIN;
+	}
+
+	f2fs_bug_on(F2FS_I_SB(inode), page->index);
+
+	f2fs_wait_on_page_writeback(dn.inode_page, NODE, true, true);
+	memcpy_from_page(inline_data_addr(inode, dn.inode_page),
+			 page, 0, MAX_INLINE_DATA(inode));
+	set_page_dirty(dn.inode_page);
+
+	f2fs_clear_page_cache_dirty_tag(page);
+
+	set_inode_flag(inode, FI_APPEND_WRITE);
+	set_inode_flag(inode, FI_DATA_EXIST);
+
+	clear_page_private_inline(dn.inode_page);
+	f2fs_put_dnode(&dn);
+	return 0;
+}
+
+int f2fs_recover_inline_data(struct inode *inode, struct page *npage)
+{
+	struct f2fs_sb_info *sbi = F2FS_I_SB(inode);
+	struct f2fs_inode *ri = NULL;
+	void *src_addr, *dst_addr;
+	struct page *ipage;
+
+	/*
+	 * The inline_data recovery policy is as follows.
+	 * [prev.] [next] of inline_data flag
+	 *    o       o  -> recover inline_data
+	 *    o       x  -> remove inline_data, and then recover data blocks
+	 *    x       o  -> remove data blocks, and then recover inline_data
+	 *    x       x  -> recover data blocks
+	 */
+	if (IS_INODE(npage))
+		ri = F2FS_INODE(npage);
+
+	if (f2fs_has_inline_data(inode) &&
+			ri && (ri->i_inline & F2FS_INLINE_DATA)) {
+process_inline:
+		ipage = f2fs_get_node_page(sbi, inode->i_ino);
+		if (IS_ERR(ipage))
+			return PTR_ERR(ipage);
+
+		f2fs_wait_on_page_writeback(ipage, NODE, true, true);
+
+		src_addr = inline_data_addr(inode, npage);
+		dst_addr = inline_data_addr(inode, ipage);
+		memcpy(dst_addr, src_addr, MAX_INLINE_DATA(inode));
+
+		set_inode_flag(inode, FI_INLINE_DATA);
+		set_inode_flag(inode, FI_DATA_EXIST);
+
+		set_page_dirty(ipage);
+		f2fs_put_page(ipage, 1);
+		return 1;
+	}
+
+	if (f2fs_has_inline_data(inode)) {
+		ipage = f2fs_get_node_page(sbi, inode->i_ino);
+		if (IS_ERR(ipage))
+			return PTR_ERR(ipage);
+		f2fs_truncate_inline_inode(inode, ipage, 0);
+		stat_dec_inline_inode(inode);
+		clear_inode_flag(inode, FI_INLINE_DATA);
+		f2fs_put_page(ipage, 1);
+	} else if (ri && (ri->i_inline & F2FS_INLINE_DATA)) {
+		int ret;
+
+		ret = f2fs_truncate_blocks(inode, 0, false);
+		if (ret)
+			return ret;
+		stat_inc_inline_inode(inode);
+		goto process_inline;
+	}
+	return 0;
+}
+
+struct f2fs_dir_entry *f2fs_find_in_inline_dir(struct inode *dir,
+					const struct f2fs_filename *fname,
+					struct page **res_page)
+{
+	struct f2fs_sb_info *sbi = F2FS_SB(dir->i_sb);
+	struct f2fs_dir_entry *de;
+	struct f2fs_dentry_ptr d;
+	struct page *ipage;
+	void *inline_dentry;
+
+	ipage = f2fs_get_node_page(sbi, dir->i_ino);
+	if (IS_ERR(ipage)) {
+		*res_page = ipage;
+		return NULL;
+	}
+
+	inline_dentry = inline_data_addr(dir, ipage);
+
+	make_dentry_ptr_inline(dir, &d, inline_dentry);
+	de = f2fs_find_target_dentry(&d, fname, NULL);
+	unlock_page(ipage);
+	if (IS_ERR(de)) {
+		*res_page = ERR_CAST(de);
+		de = NULL;
+	}
+	if (de)
+		*res_page = ipage;
+	else
+		f2fs_put_page(ipage, 0);
+
+	return de;
+}
+
+int f2fs_make_empty_inline_dir(struct inode *inode, struct inode *parent,
+							struct page *ipage)
+{
+	struct f2fs_dentry_ptr d;
+	void *inline_dentry;
+
+	inline_dentry = inline_data_addr(inode, ipage);
+
+	make_dentry_ptr_inline(inode, &d, inline_dentry);
+	f2fs_do_make_empty_dir(inode, parent, &d);
+
+	set_page_dirty(ipage);
+
+	/* update i_size to MAX_INLINE_DATA */
+	if (i_size_read(inode) < MAX_INLINE_DATA(inode))
+		f2fs_i_size_write(inode, MAX_INLINE_DATA(inode));
+	return 0;
+}
+
+/*
+ * NOTE: ipage is grabbed by caller, but if any error occurs, we should
+ * release ipage in this function.
+ */
+static int f2fs_move_inline_dirents(struct inode *dir, struct page *ipage,
+							void *inline_dentry)
+{
+	struct page *page;
+	struct dnode_of_data dn;
+	struct f2fs_dentry_block *dentry_blk;
+	struct f2fs_dentry_ptr src, dst;
+	int err;
+
+	page = f2fs_grab_cache_page(dir->i_mapping, 0, true);
+	if (!page) {
+		f2fs_put_page(ipage, 1);
+		return -ENOMEM;
+	}
+
+	set_new_dnode(&dn, dir, ipage, NULL, 0);
+	err = f2fs_reserve_block(&dn, 0);
+	if (err)
+		goto out;
+
+	if (unlikely(dn.data_blkaddr != NEW_ADDR)) {
+		f2fs_put_dnode(&dn);
+		set_sbi_flag(F2FS_P_SB(page), SBI_NEED_FSCK);
+		f2fs_warn(F2FS_P_SB(page), "%s: corrupted inline inode ino=%lx, i_addr[0]:0x%x, run fsck to fix.",
+			  __func__, dir->i_ino, dn.data_blkaddr);
+		f2fs_handle_error(F2FS_P_SB(page), ERROR_INVALID_BLKADDR);
+		err = -EFSCORRUPTED;
+		goto out;
+	}
+
+	f2fs_wait_on_page_writeback(page, DATA, true, true);
+
+	dentry_blk = page_address(page);
+
+	/*
+	 * Start by zeroing the full block, to ensure that all unused space is
+	 * zeroed and no uninitialized memory is leaked to disk.
+	 */
+	memset(dentry_blk, 0, F2FS_BLKSIZE);
+
+	make_dentry_ptr_inline(dir, &src, inline_dentry);
+	make_dentry_ptr_block(dir, &dst, dentry_blk);
+
+	/* copy data from inline dentry block to new dentry block */
+	memcpy(dst.bitmap, src.bitmap, src.nr_bitmap);
+	memcpy(dst.dentry, src.dentry, SIZE_OF_DIR_ENTRY * src.max);
+	memcpy(dst.filename, src.filename, src.max * F2FS_SLOT_LEN);
+
+	if (!PageUptodate(page))
+		SetPageUptodate(page);
+	set_page_dirty(page);
+
+	/* clear inline dir and flag after data writeback */
+	f2fs_truncate_inline_inode(dir, ipage, 0);
+
+	stat_dec_inline_dir(dir);
+	clear_inode_flag(dir, FI_INLINE_DENTRY);
+
+	/*
+	 * should retrieve reserved space which was used to keep
+	 * inline_dentry's structure for backward compatibility.
+	 */
+	if (!f2fs_sb_has_flexible_inline_xattr(F2FS_I_SB(dir)) &&
+			!f2fs_has_inline_xattr(dir))
+		F2FS_I(dir)->i_inline_xattr_size = 0;
+
+	f2fs_i_depth_write(dir, 1);
+	if (i_size_read(dir) < PAGE_SIZE)
+		f2fs_i_size_write(dir, PAGE_SIZE);
+out:
+	f2fs_put_page(page, 1);
+	return err;
+}
+
+static int f2fs_add_inline_entries(struct inode *dir, void *inline_dentry)
+{
+	struct f2fs_dentry_ptr d;
+	unsigned long bit_pos = 0;
+	int err = 0;
+
+	make_dentry_ptr_inline(dir, &d, inline_dentry);
+
+	while (bit_pos < d.max) {
+		struct f2fs_dir_entry *de;
+		struct f2fs_filename fname;
+		nid_t ino;
+		umode_t fake_mode;
+
+		if (!test_bit_le(bit_pos, d.bitmap)) {
+			bit_pos++;
+			continue;
+		}
+
+		de = &d.dentry[bit_pos];
+
+		if (unlikely(!de->name_len)) {
+			bit_pos++;
+			continue;
+		}
+
+		/*
+		 * We only need the disk_name and hash to move the dentry.
+		 * We don't need the original or casefolded filenames.
+		 */
+		memset(&fname, 0, sizeof(fname));
+		fname.disk_name.name = d.filename[bit_pos];
+		fname.disk_name.len = le16_to_cpu(de->name_len);
+		fname.hash = de->hash_code;
+
+		ino = le32_to_cpu(de->ino);
+		fake_mode = f2fs_get_de_type(de) << S_SHIFT;
+
+		err = f2fs_add_regular_entry(dir, &fname, NULL, ino, fake_mode);
+		if (err)
+			goto punch_dentry_pages;
+
+		bit_pos += GET_DENTRY_SLOTS(le16_to_cpu(de->name_len));
+	}
+	return 0;
+punch_dentry_pages:
+	truncate_inode_pages(&dir->i_data, 0);
+	f2fs_truncate_blocks(dir, 0, false);
+	f2fs_remove_dirty_inode(dir);
+	return err;
+}
+
+static int f2fs_move_rehashed_dirents(struct inode *dir, struct page *ipage,
+							void *inline_dentry)
+{
+	void *backup_dentry;
+	int err;
+
+	backup_dentry = f2fs_kmalloc(F2FS_I_SB(dir),
+				MAX_INLINE_DATA(dir), GFP_F2FS_ZERO);
+	if (!backup_dentry) {
+		f2fs_put_page(ipage, 1);
+		return -ENOMEM;
+	}
+
+	memcpy(backup_dentry, inline_dentry, MAX_INLINE_DATA(dir));
+	f2fs_truncate_inline_inode(dir, ipage, 0);
+
+	unlock_page(ipage);
+
+	err = f2fs_add_inline_entries(dir, backup_dentry);
+	if (err)
+		goto recover;
+
+	lock_page(ipage);
+
+	stat_dec_inline_dir(dir);
+	clear_inode_flag(dir, FI_INLINE_DENTRY);
+
+	/*
+	 * should retrieve reserved space which was used to keep
+	 * inline_dentry's structure for backward compatibility.
+	 */
+	if (!f2fs_sb_has_flexible_inline_xattr(F2FS_I_SB(dir)) &&
+			!f2fs_has_inline_xattr(dir))
+		F2FS_I(dir)->i_inline_xattr_size = 0;
+
+	kfree(backup_dentry);
+	return 0;
+recover:
+	lock_page(ipage);
+	f2fs_wait_on_page_writeback(ipage, NODE, true, true);
+	memcpy(inline_dentry, backup_dentry, MAX_INLINE_DATA(dir));
+	f2fs_i_depth_write(dir, 0);
+	f2fs_i_size_write(dir, MAX_INLINE_DATA(dir));
+	set_page_dirty(ipage);
+	f2fs_put_page(ipage, 1);
+
+	kfree(backup_dentry);
+	return err;
+}
+
+static int do_convert_inline_dir(struct inode *dir, struct page *ipage,
+							void *inline_dentry)
+{
+	if (!F2FS_I(dir)->i_dir_level)
+		return f2fs_move_inline_dirents(dir, ipage, inline_dentry);
+	else
+		return f2fs_move_rehashed_dirents(dir, ipage, inline_dentry);
+}
+
+int f2fs_try_convert_inline_dir(struct inode *dir, struct dentry *dentry)
+{
+	struct f2fs_sb_info *sbi = F2FS_I_SB(dir);
+	struct page *ipage;
+	struct f2fs_filename fname;
+	void *inline_dentry = NULL;
+	int err = 0;
+
+	if (!f2fs_has_inline_dentry(dir))
+		return 0;
+
+	f2fs_lock_op(sbi);
+
+	err = f2fs_setup_filename(dir, &dentry->d_name, 0, &fname);
+	if (err)
+		goto out;
+
+	ipage = f2fs_get_node_page(sbi, dir->i_ino);
+	if (IS_ERR(ipage)) {
+		err = PTR_ERR(ipage);
+		goto out_fname;
+	}
+
+	if (f2fs_has_enough_room(dir, ipage, &fname)) {
+		f2fs_put_page(ipage, 1);
+		goto out_fname;
+	}
+
+	inline_dentry = inline_data_addr(dir, ipage);
+
+	err = do_convert_inline_dir(dir, ipage, inline_dentry);
+	if (!err)
+		f2fs_put_page(ipage, 1);
+out_fname:
+	f2fs_free_filename(&fname);
+out:
+	f2fs_unlock_op(sbi);
+	return err;
+}
+
+int f2fs_add_inline_entry(struct inode *dir, const struct f2fs_filename *fname,
+			  struct inode *inode, nid_t ino, umode_t mode)
+{
+	struct f2fs_sb_info *sbi = F2FS_I_SB(dir);
+	struct page *ipage;
+	unsigned int bit_pos;
+	void *inline_dentry = NULL;
+	struct f2fs_dentry_ptr d;
+	int slots = GET_DENTRY_SLOTS(fname->disk_name.len);
+	struct page *page = NULL;
+	int err = 0;
+
+	ipage = f2fs_get_node_page(sbi, dir->i_ino);
+	if (IS_ERR(ipage))
+		return PTR_ERR(ipage);
+
+	inline_dentry = inline_data_addr(dir, ipage);
+	make_dentry_ptr_inline(dir, &d, inline_dentry);
+
+	bit_pos = f2fs_room_for_filename(d.bitmap, slots, d.max);
+	if (bit_pos >= d.max) {
+		err = do_convert_inline_dir(dir, ipage, inline_dentry);
+		if (err)
+			return err;
+		err = -EAGAIN;
+		goto out;
+	}
+
+	if (inode) {
+		f2fs_down_write_nested(&F2FS_I(inode)->i_sem,
+						SINGLE_DEPTH_NESTING);
+		page = f2fs_init_inode_metadata(inode, dir, fname, ipage);
+		if (IS_ERR(page)) {
+			err = PTR_ERR(page);
+			goto fail;
+		}
+	}
+
+	f2fs_wait_on_page_writeback(ipage, NODE, true, true);
+
+	f2fs_update_dentry(ino, mode, &d, &fname->disk_name, fname->hash,
+			   bit_pos);
+
+	set_page_dirty(ipage);
+
+	/* we don't need to mark_inode_dirty now */
+	if (inode) {
+		f2fs_i_pino_write(inode, dir->i_ino);
+
+		/* synchronize inode page's data from inode cache */
+		if (is_inode_flag_set(inode, FI_NEW_INODE))
+			f2fs_update_inode(inode, page);
+
+		f2fs_put_page(page, 1);
+	}
+
+	f2fs_update_parent_metadata(dir, inode, 0);
+fail:
+	if (inode)
+		f2fs_up_write(&F2FS_I(inode)->i_sem);
+out:
+	f2fs_put_page(ipage, 1);
+	return err;
+}
+
+void f2fs_delete_inline_entry(struct f2fs_dir_entry *dentry, struct page *page,
+					struct inode *dir, struct inode *inode)
+{
+	struct f2fs_dentry_ptr d;
+	void *inline_dentry;
+	int slots = GET_DENTRY_SLOTS(le16_to_cpu(dentry->name_len));
+	unsigned int bit_pos;
+	int i;
+
+	lock_page(page);
+	f2fs_wait_on_page_writeback(page, NODE, true, true);
+
+	inline_dentry = inline_data_addr(dir, page);
+	make_dentry_ptr_inline(dir, &d, inline_dentry);
+
+	bit_pos = dentry - d.dentry;
+	for (i = 0; i < slots; i++)
+		__clear_bit_le(bit_pos + i, d.bitmap);
+
+	set_page_dirty(page);
+	f2fs_put_page(page, 1);
+
+	dir->i_ctime = dir->i_mtime = current_time(dir);
+	f2fs_mark_inode_dirty_sync(dir, false);
+
+	if (inode)
+		f2fs_drop_nlink(dir, inode);
+}
+
+bool f2fs_empty_inline_dir(struct inode *dir)
+{
+	struct f2fs_sb_info *sbi = F2FS_I_SB(dir);
+	struct page *ipage;
+	unsigned int bit_pos = 2;
+	void *inline_dentry;
+	struct f2fs_dentry_ptr d;
+
+	ipage = f2fs_get_node_page(sbi, dir->i_ino);
+	if (IS_ERR(ipage))
+		return false;
+
+	inline_dentry = inline_data_addr(dir, ipage);
+	make_dentry_ptr_inline(dir, &d, inline_dentry);
+
+	bit_pos = find_next_bit_le(d.bitmap, d.max, bit_pos);
+
+	f2fs_put_page(ipage, 1);
+
+	if (bit_pos < d.max)
+		return false;
+
+	return true;
+}
+
+int f2fs_read_inline_dir(struct file *file, struct dir_context *ctx,
+				struct fscrypt_str *fstr)
+{
+	struct inode *inode = file_inode(file);
+	struct page *ipage = NULL;
+	struct f2fs_dentry_ptr d;
+	void *inline_dentry = NULL;
+	int err;
+
+	make_dentry_ptr_inline(inode, &d, inline_dentry);
+
+	if (ctx->pos == d.max)
+		return 0;
+
+	ipage = f2fs_get_node_page(F2FS_I_SB(inode), inode->i_ino);
+	if (IS_ERR(ipage))
+		return PTR_ERR(ipage);
+
+	/*
+	 * f2fs_readdir was protected by inode.i_rwsem, it is safe to access
+	 * ipage without page's lock held.
+	 */
+	unlock_page(ipage);
+
+	inline_dentry = inline_data_addr(inode, ipage);
+
+	make_dentry_ptr_inline(inode, &d, inline_dentry);
+
+	err = f2fs_fill_dentries(ctx, &d, 0, fstr);
+	if (!err)
+		ctx->pos = d.max;
+
+	f2fs_put_page(ipage, 0);
+	return err < 0 ? err : 0;
+}
+
+int f2fs_inline_data_fiemap(struct inode *inode,
+		struct fiemap_extent_info *fieinfo, __u64 start, __u64 len)
+{
+	__u64 byteaddr, ilen;
+	__u32 flags = FIEMAP_EXTENT_DATA_INLINE | FIEMAP_EXTENT_NOT_ALIGNED |
+		FIEMAP_EXTENT_LAST;
+	struct node_info ni;
+	struct page *ipage;
+	int err = 0;
+
+	ipage = f2fs_get_node_page(F2FS_I_SB(inode), inode->i_ino);
+	if (IS_ERR(ipage))
+		return PTR_ERR(ipage);
+
+	if ((S_ISREG(inode->i_mode) || S_ISLNK(inode->i_mode)) &&
+				!f2fs_has_inline_data(inode)) {
+		err = -EAGAIN;
+		goto out;
+	}
+
+	if (S_ISDIR(inode->i_mode) && !f2fs_has_inline_dentry(inode)) {
+		err = -EAGAIN;
+		goto out;
+	}
+
+	ilen = min_t(size_t, MAX_INLINE_DATA(inode), i_size_read(inode));
+	if (start >= ilen)
+		goto out;
+	if (start + len < ilen)
+		ilen = start + len;
+	ilen -= start;
+
+	err = f2fs_get_node_info(F2FS_I_SB(inode), inode->i_ino, &ni, false);
+	if (err)
+		goto out;
+
+	byteaddr = (__u64)ni.blk_addr << inode->i_sb->s_blocksize_bits;
+	byteaddr += (char *)inline_data_addr(inode, ipage) -
+					(char *)F2FS_INODE(ipage);
+	err = fiemap_fill_next_extent(fieinfo, start, byteaddr, ilen, flags);
+	trace_f2fs_fiemap(inode, start, byteaddr, ilen, flags, err);
+out:
+	f2fs_put_page(ipage, 1);
+	return err;
+}