Adding upstream version 5.10.209.upstream/5.10.209

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>

1 files changed, 4329 insertions, 0 deletions

diff --git a/fs/f2fs/file.c b/fs/f2fs/file.c
new file mode 100644
index 000000000..55818bd51
--- /dev/null
+++ b/fs/f2fs/file.c
@@ -0,0 +1,4329 @@
+// SPDX-License-Identifier: GPL-2.0
+/*
+ * fs/f2fs/file.c
+ *
+ * Copyright (c) 2012 Samsung Electronics Co., Ltd.
+ *             http://www.samsung.com/
+ */
+#include <linux/fs.h>
+#include <linux/f2fs_fs.h>
+#include <linux/stat.h>
+#include <linux/buffer_head.h>
+#include <linux/writeback.h>
+#include <linux/blkdev.h>
+#include <linux/falloc.h>
+#include <linux/types.h>
+#include <linux/compat.h>
+#include <linux/uaccess.h>
+#include <linux/mount.h>
+#include <linux/pagevec.h>
+#include <linux/uio.h>
+#include <linux/uuid.h>
+#include <linux/file.h>
+#include <linux/nls.h>
+#include <linux/sched/signal.h>
+
+#include "f2fs.h"
+#include "node.h"
+#include "segment.h"
+#include "xattr.h"
+#include "acl.h"
+#include "gc.h"
+#include "trace.h"
+#include <trace/events/f2fs.h>
+#include <uapi/linux/f2fs.h>
+
+static vm_fault_t f2fs_filemap_fault(struct vm_fault *vmf)
+{
+	struct inode *inode = file_inode(vmf->vma->vm_file);
+	vm_fault_t ret;
+
+	down_read(&F2FS_I(inode)->i_mmap_sem);
+	ret = filemap_fault(vmf);
+	up_read(&F2FS_I(inode)->i_mmap_sem);
+
+	if (ret & VM_FAULT_LOCKED)
+		f2fs_update_iostat(F2FS_I_SB(inode), APP_MAPPED_READ_IO,
+							F2FS_BLKSIZE);
+
+	trace_f2fs_filemap_fault(inode, vmf->pgoff, (unsigned long)ret);
+
+	return ret;
+}
+
+static vm_fault_t f2fs_vm_page_mkwrite(struct vm_fault *vmf)
+{
+	struct page *page = vmf->page;
+	struct inode *inode = file_inode(vmf->vma->vm_file);
+	struct f2fs_sb_info *sbi = F2FS_I_SB(inode);
+	struct dnode_of_data dn;
+	bool need_alloc = true;
+	int err = 0;
+
+	if (unlikely(IS_IMMUTABLE(inode)))
+		return VM_FAULT_SIGBUS;
+
+	if (unlikely(f2fs_cp_error(sbi))) {
+		err = -EIO;
+		goto err;
+	}
+
+	if (!f2fs_is_checkpoint_ready(sbi)) {
+		err = -ENOSPC;
+		goto err;
+	}
+
+#ifdef CONFIG_F2FS_FS_COMPRESSION
+	if (f2fs_compressed_file(inode)) {
+		int ret = f2fs_is_compressed_cluster(inode, page->index);
+
+		if (ret < 0) {
+			err = ret;
+			goto err;
+		} else if (ret) {
+			if (ret < F2FS_I(inode)->i_cluster_size) {
+				err = -EAGAIN;
+				goto err;
+			}
+			need_alloc = false;
+		}
+	}
+#endif
+	/* should do out of any locked page */
+	if (need_alloc)
+		f2fs_balance_fs(sbi, true);
+
+	sb_start_pagefault(inode->i_sb);
+
+	f2fs_bug_on(sbi, f2fs_has_inline_data(inode));
+
+	file_update_time(vmf->vma->vm_file);
+	down_read(&F2FS_I(inode)->i_mmap_sem);
+	lock_page(page);
+	if (unlikely(page->mapping != inode->i_mapping ||
+			page_offset(page) > i_size_read(inode) ||
+			!PageUptodate(page))) {
+		unlock_page(page);
+		err = -EFAULT;
+		goto out_sem;
+	}
+
+	if (need_alloc) {
+		/* block allocation */
+		f2fs_do_map_lock(sbi, F2FS_GET_BLOCK_PRE_AIO, true);
+		set_new_dnode(&dn, inode, NULL, NULL, 0);
+		err = f2fs_get_block(&dn, page->index);
+		f2fs_put_dnode(&dn);
+		f2fs_do_map_lock(sbi, F2FS_GET_BLOCK_PRE_AIO, false);
+	}
+
+#ifdef CONFIG_F2FS_FS_COMPRESSION
+	if (!need_alloc) {
+		set_new_dnode(&dn, inode, NULL, NULL, 0);
+		err = f2fs_get_dnode_of_data(&dn, page->index, LOOKUP_NODE);
+		f2fs_put_dnode(&dn);
+	}
+#endif
+	if (err) {
+		unlock_page(page);
+		goto out_sem;
+	}
+
+	f2fs_wait_on_page_writeback(page, DATA, false, true);
+
+	/* wait for GCed page writeback via META_MAPPING */
+	f2fs_wait_on_block_writeback(inode, dn.data_blkaddr);
+
+	/*
+	 * check to see if the page is mapped already (no holes)
+	 */
+	if (PageMappedToDisk(page))
+		goto out_sem;
+
+	/* page is wholly or partially inside EOF */
+	if (((loff_t)(page->index + 1) << PAGE_SHIFT) >
+						i_size_read(inode)) {
+		loff_t offset;
+
+		offset = i_size_read(inode) & ~PAGE_MASK;
+		zero_user_segment(page, offset, PAGE_SIZE);
+	}
+	set_page_dirty(page);
+	if (!PageUptodate(page))
+		SetPageUptodate(page);
+
+	f2fs_update_iostat(sbi, APP_MAPPED_IO, F2FS_BLKSIZE);
+	f2fs_update_time(sbi, REQ_TIME);
+
+	trace_f2fs_vm_page_mkwrite(page, DATA);
+out_sem:
+	up_read(&F2FS_I(inode)->i_mmap_sem);
+
+	sb_end_pagefault(inode->i_sb);
+err:
+	return block_page_mkwrite_return(err);
+}
+
+static const struct vm_operations_struct f2fs_file_vm_ops = {
+	.fault		= f2fs_filemap_fault,
+	.map_pages	= filemap_map_pages,
+	.page_mkwrite	= f2fs_vm_page_mkwrite,
+};
+
+static int get_parent_ino(struct inode *inode, nid_t *pino)
+{
+	struct dentry *dentry;
+
+	/*
+	 * Make sure to get the non-deleted alias.  The alias associated with
+	 * the open file descriptor being fsync()'ed may be deleted already.
+	 */
+	dentry = d_find_alias(inode);
+	if (!dentry)
+		return 0;
+
+	*pino = parent_ino(dentry);
+	dput(dentry);
+	return 1;
+}
+
+static inline enum cp_reason_type need_do_checkpoint(struct inode *inode)
+{
+	struct f2fs_sb_info *sbi = F2FS_I_SB(inode);
+	enum cp_reason_type cp_reason = CP_NO_NEEDED;
+
+	if (!S_ISREG(inode->i_mode))
+		cp_reason = CP_NON_REGULAR;
+	else if (f2fs_compressed_file(inode))
+		cp_reason = CP_COMPRESSED;
+	else if (inode->i_nlink != 1)
+		cp_reason = CP_HARDLINK;
+	else if (is_sbi_flag_set(sbi, SBI_NEED_CP))
+		cp_reason = CP_SB_NEED_CP;
+	else if (file_wrong_pino(inode))
+		cp_reason = CP_WRONG_PINO;
+	else if (!f2fs_space_for_roll_forward(sbi))
+		cp_reason = CP_NO_SPC_ROLL;
+	else if (!f2fs_is_checkpointed_node(sbi, F2FS_I(inode)->i_pino))
+		cp_reason = CP_NODE_NEED_CP;
+	else if (test_opt(sbi, FASTBOOT))
+		cp_reason = CP_FASTBOOT_MODE;
+	else if (F2FS_OPTION(sbi).active_logs == 2)
+		cp_reason = CP_SPEC_LOG_NUM;
+	else if (F2FS_OPTION(sbi).fsync_mode == FSYNC_MODE_STRICT &&
+		f2fs_need_dentry_mark(sbi, inode->i_ino) &&
+		f2fs_exist_written_data(sbi, F2FS_I(inode)->i_pino,
+							TRANS_DIR_INO))
+		cp_reason = CP_RECOVER_DIR;
+
+	return cp_reason;
+}
+
+static bool need_inode_page_update(struct f2fs_sb_info *sbi, nid_t ino)
+{
+	struct page *i = find_get_page(NODE_MAPPING(sbi), ino);
+	bool ret = false;
+	/* But we need to avoid that there are some inode updates */
+	if ((i && PageDirty(i)) || f2fs_need_inode_block_update(sbi, ino))
+		ret = true;
+	f2fs_put_page(i, 0);
+	return ret;
+}
+
+static void try_to_fix_pino(struct inode *inode)
+{
+	struct f2fs_inode_info *fi = F2FS_I(inode);
+	nid_t pino;
+
+	down_write(&fi->i_sem);
+	if (file_wrong_pino(inode) && inode->i_nlink == 1 &&
+			get_parent_ino(inode, &pino)) {
+		f2fs_i_pino_write(inode, pino);
+		file_got_pino(inode);
+	}
+	up_write(&fi->i_sem);
+}
+
+static int f2fs_do_sync_file(struct file *file, loff_t start, loff_t end,
+						int datasync, bool atomic)
+{
+	struct inode *inode = file->f_mapping->host;
+	struct f2fs_sb_info *sbi = F2FS_I_SB(inode);
+	nid_t ino = inode->i_ino;
+	int ret = 0;
+	enum cp_reason_type cp_reason = 0;
+	struct writeback_control wbc = {
+		.sync_mode = WB_SYNC_ALL,
+		.nr_to_write = LONG_MAX,
+		.for_reclaim = 0,
+	};
+	unsigned int seq_id = 0;
+
+	if (unlikely(f2fs_readonly(inode->i_sb)))
+		return 0;
+
+	trace_f2fs_sync_file_enter(inode);
+
+	if (S_ISDIR(inode->i_mode))
+		goto go_write;
+
+	/* if fdatasync is triggered, let's do in-place-update */
+	if (datasync || get_dirty_pages(inode) <= SM_I(sbi)->min_fsync_blocks)
+		set_inode_flag(inode, FI_NEED_IPU);
+	ret = file_write_and_wait_range(file, start, end);
+	clear_inode_flag(inode, FI_NEED_IPU);
+
+	if (ret || is_sbi_flag_set(sbi, SBI_CP_DISABLED)) {
+		trace_f2fs_sync_file_exit(inode, cp_reason, datasync, ret);
+		return ret;
+	}
+
+	/* if the inode is dirty, let's recover all the time */
+	if (!f2fs_skip_inode_update(inode, datasync)) {
+		f2fs_write_inode(inode, NULL);
+		goto go_write;
+	}
+
+	/*
+	 * if there is no written data, don't waste time to write recovery info.
+	 */
+	if (!is_inode_flag_set(inode, FI_APPEND_WRITE) &&
+			!f2fs_exist_written_data(sbi, ino, APPEND_INO)) {
+
+		/* it may call write_inode just prior to fsync */
+		if (need_inode_page_update(sbi, ino))
+			goto go_write;
+
+		if (is_inode_flag_set(inode, FI_UPDATE_WRITE) ||
+				f2fs_exist_written_data(sbi, ino, UPDATE_INO))
+			goto flush_out;
+		goto out;
+	}
+go_write:
+	/*
+	 * Both of fdatasync() and fsync() are able to be recovered from
+	 * sudden-power-off.
+	 */
+	down_read(&F2FS_I(inode)->i_sem);
+	cp_reason = need_do_checkpoint(inode);
+	up_read(&F2FS_I(inode)->i_sem);
+
+	if (cp_reason) {
+		/* all the dirty node pages should be flushed for POR */
+		ret = f2fs_sync_fs(inode->i_sb, 1);
+
+		/*
+		 * We've secured consistency through sync_fs. Following pino
+		 * will be used only for fsynced inodes after checkpoint.
+		 */
+		try_to_fix_pino(inode);
+		clear_inode_flag(inode, FI_APPEND_WRITE);
+		clear_inode_flag(inode, FI_UPDATE_WRITE);
+		goto out;
+	}
+sync_nodes:
+	atomic_inc(&sbi->wb_sync_req[NODE]);
+	ret = f2fs_fsync_node_pages(sbi, inode, &wbc, atomic, &seq_id);
+	atomic_dec(&sbi->wb_sync_req[NODE]);
+	if (ret)
+		goto out;
+
+	/* if cp_error was enabled, we should avoid infinite loop */
+	if (unlikely(f2fs_cp_error(sbi))) {
+		ret = -EIO;
+		goto out;
+	}
+
+	if (f2fs_need_inode_block_update(sbi, ino)) {
+		f2fs_mark_inode_dirty_sync(inode, true);
+		f2fs_write_inode(inode, NULL);
+		goto sync_nodes;
+	}
+
+	/*
+	 * If it's atomic_write, it's just fine to keep write ordering. So
+	 * here we don't need to wait for node write completion, since we use
+	 * node chain which serializes node blocks. If one of node writes are
+	 * reordered, we can see simply broken chain, resulting in stopping
+	 * roll-forward recovery. It means we'll recover all or none node blocks
+	 * given fsync mark.
+	 */
+	if (!atomic) {
+		ret = f2fs_wait_on_node_pages_writeback(sbi, seq_id);
+		if (ret)
+			goto out;
+	}
+
+	/* once recovery info is written, don't need to tack this */
+	f2fs_remove_ino_entry(sbi, ino, APPEND_INO);
+	clear_inode_flag(inode, FI_APPEND_WRITE);
+flush_out:
+	if (!atomic && F2FS_OPTION(sbi).fsync_mode != FSYNC_MODE_NOBARRIER)
+		ret = f2fs_issue_flush(sbi, inode->i_ino);
+	if (!ret) {
+		f2fs_remove_ino_entry(sbi, ino, UPDATE_INO);
+		clear_inode_flag(inode, FI_UPDATE_WRITE);
+		f2fs_remove_ino_entry(sbi, ino, FLUSH_INO);
+	}
+	f2fs_update_time(sbi, REQ_TIME);
+out:
+	trace_f2fs_sync_file_exit(inode, cp_reason, datasync, ret);
+	f2fs_trace_ios(NULL, 1);
+	return ret;
+}
+
+int f2fs_sync_file(struct file *file, loff_t start, loff_t end, int datasync)
+{
+	if (unlikely(f2fs_cp_error(F2FS_I_SB(file_inode(file)))))
+		return -EIO;
+	return f2fs_do_sync_file(file, start, end, datasync, false);
+}
+
+static bool __found_offset(struct address_space *mapping, block_t blkaddr,
+				pgoff_t index, int whence)
+{
+	switch (whence) {
+	case SEEK_DATA:
+		if (__is_valid_data_blkaddr(blkaddr))
+			return true;
+		if (blkaddr == NEW_ADDR &&
+		    xa_get_mark(&mapping->i_pages, index, PAGECACHE_TAG_DIRTY))
+			return true;
+		break;
+	case SEEK_HOLE:
+		if (blkaddr == NULL_ADDR)
+			return true;
+		break;
+	}
+	return false;
+}
+
+static loff_t f2fs_seek_block(struct file *file, loff_t offset, int whence)
+{
+	struct inode *inode = file->f_mapping->host;
+	loff_t maxbytes = inode->i_sb->s_maxbytes;
+	struct dnode_of_data dn;
+	pgoff_t pgofs, end_offset;
+	loff_t data_ofs = offset;
+	loff_t isize;
+	int err = 0;
+
+	inode_lock(inode);
+
+	isize = i_size_read(inode);
+	if (offset >= isize)
+		goto fail;
+
+	/* handle inline data case */
+	if (f2fs_has_inline_data(inode)) {
+		if (whence == SEEK_HOLE) {
+			data_ofs = isize;
+			goto found;
+		} else if (whence == SEEK_DATA) {
+			data_ofs = offset;
+			goto found;
+		}
+	}
+
+	pgofs = (pgoff_t)(offset >> PAGE_SHIFT);
+
+	for (; data_ofs < isize; data_ofs = (loff_t)pgofs << PAGE_SHIFT) {
+		set_new_dnode(&dn, inode, NULL, NULL, 0);
+		err = f2fs_get_dnode_of_data(&dn, pgofs, LOOKUP_NODE);
+		if (err && err != -ENOENT) {
+			goto fail;
+		} else if (err == -ENOENT) {
+			/* direct node does not exists */
+			if (whence == SEEK_DATA) {
+				pgofs = f2fs_get_next_page_offset(&dn, pgofs);
+				continue;
+			} else {
+				goto found;
+			}
+		}
+
+		end_offset = ADDRS_PER_PAGE(dn.node_page, inode);
+
+		/* find data/hole in dnode block */
+		for (; dn.ofs_in_node < end_offset;
+				dn.ofs_in_node++, pgofs++,
+				data_ofs = (loff_t)pgofs << PAGE_SHIFT) {
+			block_t blkaddr;
+
+			blkaddr = f2fs_data_blkaddr(&dn);
+
+			if (__is_valid_data_blkaddr(blkaddr) &&
+				!f2fs_is_valid_blkaddr(F2FS_I_SB(inode),
+					blkaddr, DATA_GENERIC_ENHANCE)) {
+				f2fs_put_dnode(&dn);
+				goto fail;
+			}
+
+			if (__found_offset(file->f_mapping, blkaddr,
+							pgofs, whence)) {
+				f2fs_put_dnode(&dn);
+				goto found;
+			}
+		}
+		f2fs_put_dnode(&dn);
+	}
+
+	if (whence == SEEK_DATA)
+		goto fail;
+found:
+	if (whence == SEEK_HOLE && data_ofs > isize)
+		data_ofs = isize;
+	inode_unlock(inode);
+	return vfs_setpos(file, data_ofs, maxbytes);
+fail:
+	inode_unlock(inode);
+	return -ENXIO;
+}
+
+static loff_t f2fs_llseek(struct file *file, loff_t offset, int whence)
+{
+	struct inode *inode = file->f_mapping->host;
+	loff_t maxbytes = inode->i_sb->s_maxbytes;
+
+	switch (whence) {
+	case SEEK_SET:
+	case SEEK_CUR:
+	case SEEK_END:
+		return generic_file_llseek_size(file, offset, whence,
+						maxbytes, i_size_read(inode));
+	case SEEK_DATA:
+	case SEEK_HOLE:
+		if (offset < 0)
+			return -ENXIO;
+		return f2fs_seek_block(file, offset, whence);
+	}
+
+	return -EINVAL;
+}
+
+static int f2fs_file_mmap(struct file *file, struct vm_area_struct *vma)
+{
+	struct inode *inode = file_inode(file);
+	int err;
+
+	if (unlikely(f2fs_cp_error(F2FS_I_SB(inode))))
+		return -EIO;
+
+	if (!f2fs_is_compress_backend_ready(inode))
+		return -EOPNOTSUPP;
+
+	/* we don't need to use inline_data strictly */
+	err = f2fs_convert_inline_inode(inode);
+	if (err)
+		return err;
+
+	file_accessed(file);
+	vma->vm_ops = &f2fs_file_vm_ops;
+	set_inode_flag(inode, FI_MMAP_FILE);
+	return 0;
+}
+
+static int f2fs_file_open(struct inode *inode, struct file *filp)
+{
+	int err = fscrypt_file_open(inode, filp);
+
+	if (err)
+		return err;
+
+	if (!f2fs_is_compress_backend_ready(inode))
+		return -EOPNOTSUPP;
+
+	err = fsverity_file_open(inode, filp);
+	if (err)
+		return err;
+
+	filp->f_mode |= FMODE_NOWAIT;
+
+	return dquot_file_open(inode, filp);
+}
+
+void f2fs_truncate_data_blocks_range(struct dnode_of_data *dn, int count)
+{
+	struct f2fs_sb_info *sbi = F2FS_I_SB(dn->inode);
+	struct f2fs_node *raw_node;
+	int nr_free = 0, ofs = dn->ofs_in_node, len = count;
+	__le32 *addr;
+	int base = 0;
+	bool compressed_cluster = false;
+	int cluster_index = 0, valid_blocks = 0;
+	int cluster_size = F2FS_I(dn->inode)->i_cluster_size;
+	bool released = !atomic_read(&F2FS_I(dn->inode)->i_compr_blocks);
+
+	if (IS_INODE(dn->node_page) && f2fs_has_extra_attr(dn->inode))
+		base = get_extra_isize(dn->inode);
+
+	raw_node = F2FS_NODE(dn->node_page);
+	addr = blkaddr_in_node(raw_node) + base + ofs;
+
+	/* Assumption: truncateion starts with cluster */
+	for (; count > 0; count--, addr++, dn->ofs_in_node++, cluster_index++) {
+		block_t blkaddr = le32_to_cpu(*addr);
+
+		if (f2fs_compressed_file(dn->inode) &&
+					!(cluster_index & (cluster_size - 1))) {
+			if (compressed_cluster)
+				f2fs_i_compr_blocks_update(dn->inode,
+							valid_blocks, false);
+			compressed_cluster = (blkaddr == COMPRESS_ADDR);
+			valid_blocks = 0;
+		}
+
+		if (blkaddr == NULL_ADDR)
+			continue;
+
+		dn->data_blkaddr = NULL_ADDR;
+		f2fs_set_data_blkaddr(dn);
+
+		if (__is_valid_data_blkaddr(blkaddr)) {
+			if (!f2fs_is_valid_blkaddr(sbi, blkaddr,
+					DATA_GENERIC_ENHANCE))
+				continue;
+			if (compressed_cluster)
+				valid_blocks++;
+		}
+
+		if (dn->ofs_in_node == 0 && IS_INODE(dn->node_page))
+			clear_inode_flag(dn->inode, FI_FIRST_BLOCK_WRITTEN);
+
+		f2fs_invalidate_blocks(sbi, blkaddr);
+
+		if (!released || blkaddr != COMPRESS_ADDR)
+			nr_free++;
+	}
+
+	if (compressed_cluster)
+		f2fs_i_compr_blocks_update(dn->inode, valid_blocks, false);
+
+	if (nr_free) {
+		pgoff_t fofs;
+		/*
+		 * once we invalidate valid blkaddr in range [ofs, ofs + count],
+		 * we will invalidate all blkaddr in the whole range.
+		 */
+		fofs = f2fs_start_bidx_of_node(ofs_of_node(dn->node_page),
+							dn->inode) + ofs;
+		f2fs_update_extent_cache_range(dn, fofs, 0, len);
+		dec_valid_block_count(sbi, dn->inode, nr_free);
+	}
+	dn->ofs_in_node = ofs;
+
+	f2fs_update_time(sbi, REQ_TIME);
+	trace_f2fs_truncate_data_blocks_range(dn->inode, dn->nid,
+					 dn->ofs_in_node, nr_free);
+}
+
+void f2fs_truncate_data_blocks(struct dnode_of_data *dn)
+{
+	f2fs_truncate_data_blocks_range(dn, ADDRS_PER_BLOCK(dn->inode));
+}
+
+static int truncate_partial_data_page(struct inode *inode, u64 from,
+								bool cache_only)
+{
+	loff_t offset = from & (PAGE_SIZE - 1);
+	pgoff_t index = from >> PAGE_SHIFT;
+	struct address_space *mapping = inode->i_mapping;
+	struct page *page;
+
+	if (!offset && !cache_only)
+		return 0;
+
+	if (cache_only) {
+		page = find_lock_page(mapping, index);
+		if (page && PageUptodate(page))
+			goto truncate_out;
+		f2fs_put_page(page, 1);
+		return 0;
+	}
+
+	page = f2fs_get_lock_data_page(inode, index, true);
+	if (IS_ERR(page))
+		return PTR_ERR(page) == -ENOENT ? 0 : PTR_ERR(page);
+truncate_out:
+	f2fs_wait_on_page_writeback(page, DATA, true, true);
+	zero_user(page, offset, PAGE_SIZE - offset);
+
+	/* An encrypted inode should have a key and truncate the last page. */
+	f2fs_bug_on(F2FS_I_SB(inode), cache_only && IS_ENCRYPTED(inode));
+	if (!cache_only)
+		set_page_dirty(page);
+	f2fs_put_page(page, 1);
+	return 0;
+}
+
+int f2fs_do_truncate_blocks(struct inode *inode, u64 from, bool lock)
+{
+	struct f2fs_sb_info *sbi = F2FS_I_SB(inode);
+	struct dnode_of_data dn;
+	pgoff_t free_from;
+	int count = 0, err = 0;
+	struct page *ipage;
+	bool truncate_page = false;
+
+	trace_f2fs_truncate_blocks_enter(inode, from);
+
+	free_from = (pgoff_t)F2FS_BLK_ALIGN(from);
+
+	if (free_from >= sbi->max_file_blocks)
+		goto free_partial;
+
+	if (lock)
+		f2fs_lock_op(sbi);
+
+	ipage = f2fs_get_node_page(sbi, inode->i_ino);
+	if (IS_ERR(ipage)) {
+		err = PTR_ERR(ipage);
+		goto out;
+	}
+
+	if (f2fs_has_inline_data(inode)) {
+		f2fs_truncate_inline_inode(inode, ipage, from);
+		f2fs_put_page(ipage, 1);
+		truncate_page = true;
+		goto out;
+	}
+
+	set_new_dnode(&dn, inode, ipage, NULL, 0);
+	err = f2fs_get_dnode_of_data(&dn, free_from, LOOKUP_NODE_RA);
+	if (err) {
+		if (err == -ENOENT)
+			goto free_next;
+		goto out;
+	}
+
+	count = ADDRS_PER_PAGE(dn.node_page, inode);
+
+	count -= dn.ofs_in_node;
+	f2fs_bug_on(sbi, count < 0);
+
+	if (dn.ofs_in_node || IS_INODE(dn.node_page)) {
+		f2fs_truncate_data_blocks_range(&dn, count);
+		free_from += count;
+	}
+
+	f2fs_put_dnode(&dn);
+free_next:
+	err = f2fs_truncate_inode_blocks(inode, free_from);
+out:
+	if (lock)
+		f2fs_unlock_op(sbi);
+free_partial:
+	/* lastly zero out the first data page */
+	if (!err)
+		err = truncate_partial_data_page(inode, from, truncate_page);
+
+	trace_f2fs_truncate_blocks_exit(inode, err);
+	return err;
+}
+
+int f2fs_truncate_blocks(struct inode *inode, u64 from, bool lock)
+{
+	u64 free_from = from;
+	int err;
+
+#ifdef CONFIG_F2FS_FS_COMPRESSION
+	/*
+	 * for compressed file, only support cluster size
+	 * aligned truncation.
+	 */
+	if (f2fs_compressed_file(inode))
+		free_from = round_up(from,
+				F2FS_I(inode)->i_cluster_size << PAGE_SHIFT);
+#endif
+
+	err = f2fs_do_truncate_blocks(inode, free_from, lock);
+	if (err)
+		return err;
+
+#ifdef CONFIG_F2FS_FS_COMPRESSION
+	if (from != free_from) {
+		err = f2fs_truncate_partial_cluster(inode, from, lock);
+		if (err)
+			return err;
+	}
+#endif
+
+	return 0;
+}
+
+int f2fs_truncate(struct inode *inode)
+{
+	int err;
+
+	if (unlikely(f2fs_cp_error(F2FS_I_SB(inode))))
+		return -EIO;
+
+	if (!(S_ISREG(inode->i_mode) || S_ISDIR(inode->i_mode) ||
+				S_ISLNK(inode->i_mode)))
+		return 0;
+
+	trace_f2fs_truncate(inode);
+
+	if (time_to_inject(F2FS_I_SB(inode), FAULT_TRUNCATE)) {
+		f2fs_show_injection_info(F2FS_I_SB(inode), FAULT_TRUNCATE);
+		return -EIO;
+	}
+
+	err = dquot_initialize(inode);
+	if (err)
+		return err;
+
+	/* we should check inline_data size */
+	if (!f2fs_may_inline_data(inode)) {
+		err = f2fs_convert_inline_inode(inode);
+		if (err)
+			return err;
+	}
+
+	err = f2fs_truncate_blocks(inode, i_size_read(inode), true);
+	if (err)
+		return err;
+
+	inode->i_mtime = inode->i_ctime = current_time(inode);
+	f2fs_mark_inode_dirty_sync(inode, false);
+	return 0;
+}
+
+int f2fs_getattr(const struct path *path, struct kstat *stat,
+		 u32 request_mask, unsigned int query_flags)
+{
+	struct inode *inode = d_inode(path->dentry);
+	struct f2fs_inode_info *fi = F2FS_I(inode);
+	struct f2fs_inode *ri;
+	unsigned int flags;
+
+	if (f2fs_has_extra_attr(inode) &&
+			f2fs_sb_has_inode_crtime(F2FS_I_SB(inode)) &&
+			F2FS_FITS_IN_INODE(ri, fi->i_extra_isize, i_crtime)) {
+		stat->result_mask |= STATX_BTIME;
+		stat->btime.tv_sec = fi->i_crtime.tv_sec;
+		stat->btime.tv_nsec = fi->i_crtime.tv_nsec;
+	}
+
+	flags = fi->i_flags;
+	if (flags & F2FS_COMPR_FL)
+		stat->attributes |= STATX_ATTR_COMPRESSED;
+	if (flags & F2FS_APPEND_FL)
+		stat->attributes |= STATX_ATTR_APPEND;
+	if (IS_ENCRYPTED(inode))
+		stat->attributes |= STATX_ATTR_ENCRYPTED;
+	if (flags & F2FS_IMMUTABLE_FL)
+		stat->attributes |= STATX_ATTR_IMMUTABLE;
+	if (flags & F2FS_NODUMP_FL)
+		stat->attributes |= STATX_ATTR_NODUMP;
+	if (IS_VERITY(inode))
+		stat->attributes |= STATX_ATTR_VERITY;
+
+	stat->attributes_mask |= (STATX_ATTR_COMPRESSED |
+				  STATX_ATTR_APPEND |
+				  STATX_ATTR_ENCRYPTED |
+				  STATX_ATTR_IMMUTABLE |
+				  STATX_ATTR_NODUMP |
+				  STATX_ATTR_VERITY);
+
+	generic_fillattr(inode, stat);
+
+	/* we need to show initial sectors used for inline_data/dentries */
+	if ((S_ISREG(inode->i_mode) && f2fs_has_inline_data(inode)) ||
+					f2fs_has_inline_dentry(inode))
+		stat->blocks += (stat->size + 511) >> 9;
+
+	return 0;
+}
+
+#ifdef CONFIG_F2FS_FS_POSIX_ACL
+static void __setattr_copy(struct inode *inode, const struct iattr *attr)
+{
+	unsigned int ia_valid = attr->ia_valid;
+
+	if (ia_valid & ATTR_UID)
+		inode->i_uid = attr->ia_uid;
+	if (ia_valid & ATTR_GID)
+		inode->i_gid = attr->ia_gid;
+	if (ia_valid & ATTR_ATIME)
+		inode->i_atime = attr->ia_atime;
+	if (ia_valid & ATTR_MTIME)
+		inode->i_mtime = attr->ia_mtime;
+	if (ia_valid & ATTR_CTIME)
+		inode->i_ctime = attr->ia_ctime;
+	if (ia_valid & ATTR_MODE) {
+		umode_t mode = attr->ia_mode;
+
+		if (!in_group_p(inode->i_gid) &&
+			!capable_wrt_inode_uidgid(inode, CAP_FSETID))
+			mode &= ~S_ISGID;
+		set_acl_inode(inode, mode);
+	}
+}
+#else
+#define __setattr_copy setattr_copy
+#endif
+
+int f2fs_setattr(struct dentry *dentry, struct iattr *attr)
+{
+	struct inode *inode = d_inode(dentry);
+	int err;
+
+	if (unlikely(f2fs_cp_error(F2FS_I_SB(inode))))
+		return -EIO;
+
+	if (unlikely(IS_IMMUTABLE(inode)))
+		return -EPERM;
+
+	if (unlikely(IS_APPEND(inode) &&
+			(attr->ia_valid & (ATTR_MODE | ATTR_UID |
+				  ATTR_GID | ATTR_TIMES_SET))))
+		return -EPERM;
+
+	if ((attr->ia_valid & ATTR_SIZE) &&
+		!f2fs_is_compress_backend_ready(inode))
+		return -EOPNOTSUPP;
+
+	err = setattr_prepare(dentry, attr);
+	if (err)
+		return err;
+
+	err = fscrypt_prepare_setattr(dentry, attr);
+	if (err)
+		return err;
+
+	err = fsverity_prepare_setattr(dentry, attr);
+	if (err)
+		return err;
+
+	if (is_quota_modification(inode, attr)) {
+		err = dquot_initialize(inode);
+		if (err)
+			return err;
+	}
+	if ((attr->ia_valid & ATTR_UID &&
+		!uid_eq(attr->ia_uid, inode->i_uid)) ||
+		(attr->ia_valid & ATTR_GID &&
+		!gid_eq(attr->ia_gid, inode->i_gid))) {
+		f2fs_lock_op(F2FS_I_SB(inode));
+		err = dquot_transfer(inode, attr);
+		if (err) {
+			set_sbi_flag(F2FS_I_SB(inode),
+					SBI_QUOTA_NEED_REPAIR);
+			f2fs_unlock_op(F2FS_I_SB(inode));
+			return err;
+		}
+		/*
+		 * update uid/gid under lock_op(), so that dquot and inode can
+		 * be updated atomically.
+		 */
+		if (attr->ia_valid & ATTR_UID)
+			inode->i_uid = attr->ia_uid;
+		if (attr->ia_valid & ATTR_GID)
+			inode->i_gid = attr->ia_gid;
+		f2fs_mark_inode_dirty_sync(inode, true);
+		f2fs_unlock_op(F2FS_I_SB(inode));
+	}
+
+	if (attr->ia_valid & ATTR_SIZE) {
+		loff_t old_size = i_size_read(inode);
+
+		if (attr->ia_size > MAX_INLINE_DATA(inode)) {
+			/*
+			 * should convert inline inode before i_size_write to
+			 * keep smaller than inline_data size with inline flag.
+			 */
+			err = f2fs_convert_inline_inode(inode);
+			if (err)
+				return err;
+		}
+
+		down_write(&F2FS_I(inode)->i_gc_rwsem[WRITE]);
+		down_write(&F2FS_I(inode)->i_mmap_sem);
+
+		truncate_setsize(inode, attr->ia_size);
+
+		if (attr->ia_size <= old_size)
+			err = f2fs_truncate(inode);
+		/*
+		 * do not trim all blocks after i_size if target size is
+		 * larger than i_size.
+		 */
+		up_write(&F2FS_I(inode)->i_mmap_sem);
+		up_write(&F2FS_I(inode)->i_gc_rwsem[WRITE]);
+		if (err)
+			return err;
+
+		spin_lock(&F2FS_I(inode)->i_size_lock);
+		inode->i_mtime = inode->i_ctime = current_time(inode);
+		F2FS_I(inode)->last_disk_size = i_size_read(inode);
+		spin_unlock(&F2FS_I(inode)->i_size_lock);
+	}
+
+	__setattr_copy(inode, attr);
+
+	if (attr->ia_valid & ATTR_MODE) {
+		err = posix_acl_chmod(inode, f2fs_get_inode_mode(inode));
+		if (err || is_inode_flag_set(inode, FI_ACL_MODE)) {
+			inode->i_mode = F2FS_I(inode)->i_acl_mode;
+			clear_inode_flag(inode, FI_ACL_MODE);
+		}
+	}
+
+	/* file size may changed here */
+	f2fs_mark_inode_dirty_sync(inode, true);
+
+	/* inode change will produce dirty node pages flushed by checkpoint */
+	f2fs_balance_fs(F2FS_I_SB(inode), true);
+
+	return err;
+}
+
+const struct inode_operations f2fs_file_inode_operations = {
+	.getattr	= f2fs_getattr,
+	.setattr	= f2fs_setattr,
+	.get_acl	= f2fs_get_acl,
+	.set_acl	= f2fs_set_acl,
+	.listxattr	= f2fs_listxattr,
+	.fiemap		= f2fs_fiemap,
+};
+
+static int fill_zero(struct inode *inode, pgoff_t index,
+					loff_t start, loff_t len)
+{
+	struct f2fs_sb_info *sbi = F2FS_I_SB(inode);
+	struct page *page;
+
+	if (!len)
+		return 0;
+
+	f2fs_balance_fs(sbi, true);
+
+	f2fs_lock_op(sbi);
+	page = f2fs_get_new_data_page(inode, NULL, index, false);
+	f2fs_unlock_op(sbi);
+
+	if (IS_ERR(page))
+		return PTR_ERR(page);
+
+	f2fs_wait_on_page_writeback(page, DATA, true, true);
+	zero_user(page, start, len);
+	set_page_dirty(page);
+	f2fs_put_page(page, 1);
+	return 0;
+}
+
+int f2fs_truncate_hole(struct inode *inode, pgoff_t pg_start, pgoff_t pg_end)
+{
+	int err;
+
+	while (pg_start < pg_end) {
+		struct dnode_of_data dn;
+		pgoff_t end_offset, count;
+
+		set_new_dnode(&dn, inode, NULL, NULL, 0);
+		err = f2fs_get_dnode_of_data(&dn, pg_start, LOOKUP_NODE);
+		if (err) {
+			if (err == -ENOENT) {
+				pg_start = f2fs_get_next_page_offset(&dn,
+								pg_start);
+				continue;
+			}
+			return err;
+		}
+
+		end_offset = ADDRS_PER_PAGE(dn.node_page, inode);
+		count = min(end_offset - dn.ofs_in_node, pg_end - pg_start);
+
+		f2fs_bug_on(F2FS_I_SB(inode), count == 0 || count > end_offset);
+
+		f2fs_truncate_data_blocks_range(&dn, count);
+		f2fs_put_dnode(&dn);
+
+		pg_start += count;
+	}
+	return 0;
+}
+
+static int punch_hole(struct inode *inode, loff_t offset, loff_t len)
+{
+	pgoff_t pg_start, pg_end;
+	loff_t off_start, off_end;
+	int ret;
+
+	ret = f2fs_convert_inline_inode(inode);
+	if (ret)
+		return ret;
+
+	pg_start = ((unsigned long long) offset) >> PAGE_SHIFT;
+	pg_end = ((unsigned long long) offset + len) >> PAGE_SHIFT;
+
+	off_start = offset & (PAGE_SIZE - 1);
+	off_end = (offset + len) & (PAGE_SIZE - 1);
+
+	if (pg_start == pg_end) {
+		ret = fill_zero(inode, pg_start, off_start,
+						off_end - off_start);
+		if (ret)
+			return ret;
+	} else {
+		if (off_start) {
+			ret = fill_zero(inode, pg_start++, off_start,
+						PAGE_SIZE - off_start);
+			if (ret)
+				return ret;
+		}
+		if (off_end) {
+			ret = fill_zero(inode, pg_end, 0, off_end);
+			if (ret)
+				return ret;
+		}
+
+		if (pg_start < pg_end) {
+			loff_t blk_start, blk_end;
+			struct f2fs_sb_info *sbi = F2FS_I_SB(inode);
+
+			f2fs_balance_fs(sbi, true);
+
+			blk_start = (loff_t)pg_start << PAGE_SHIFT;
+			blk_end = (loff_t)pg_end << PAGE_SHIFT;
+
+			down_write(&F2FS_I(inode)->i_gc_rwsem[WRITE]);
+			down_write(&F2FS_I(inode)->i_mmap_sem);
+
+			truncate_pagecache_range(inode, blk_start, blk_end - 1);
+
+			f2fs_lock_op(sbi);
+			ret = f2fs_truncate_hole(inode, pg_start, pg_end);
+			f2fs_unlock_op(sbi);
+
+			up_write(&F2FS_I(inode)->i_mmap_sem);
+			up_write(&F2FS_I(inode)->i_gc_rwsem[WRITE]);
+		}
+	}
+
+	return ret;
+}
+
+static int __read_out_blkaddrs(struct inode *inode, block_t *blkaddr,
+				int *do_replace, pgoff_t off, pgoff_t len)
+{
+	struct f2fs_sb_info *sbi = F2FS_I_SB(inode);
+	struct dnode_of_data dn;
+	int ret, done, i;
+
+next_dnode:
+	set_new_dnode(&dn, inode, NULL, NULL, 0);
+	ret = f2fs_get_dnode_of_data(&dn, off, LOOKUP_NODE_RA);
+	if (ret && ret != -ENOENT) {
+		return ret;
+	} else if (ret == -ENOENT) {
+		if (dn.max_level == 0)
+			return -ENOENT;
+		done = min((pgoff_t)ADDRS_PER_BLOCK(inode) -
+						dn.ofs_in_node, len);
+		blkaddr += done;
+		do_replace += done;
+		goto next;
+	}
+
+	done = min((pgoff_t)ADDRS_PER_PAGE(dn.node_page, inode) -
+							dn.ofs_in_node, len);
+	for (i = 0; i < done; i++, blkaddr++, do_replace++, dn.ofs_in_node++) {
+		*blkaddr = f2fs_data_blkaddr(&dn);
+
+		if (__is_valid_data_blkaddr(*blkaddr) &&
+			!f2fs_is_valid_blkaddr(sbi, *blkaddr,
+					DATA_GENERIC_ENHANCE)) {
+			f2fs_put_dnode(&dn);
+			return -EFSCORRUPTED;
+		}
+
+		if (!f2fs_is_checkpointed_data(sbi, *blkaddr)) {
+
+			if (f2fs_lfs_mode(sbi)) {
+				f2fs_put_dnode(&dn);
+				return -EOPNOTSUPP;
+			}
+
+			/* do not invalidate this block address */
+			f2fs_update_data_blkaddr(&dn, NULL_ADDR);
+			*do_replace = 1;
+		}
+	}
+	f2fs_put_dnode(&dn);
+next:
+	len -= done;
+	off += done;
+	if (len)
+		goto next_dnode;
+	return 0;
+}
+
+static int __roll_back_blkaddrs(struct inode *inode, block_t *blkaddr,
+				int *do_replace, pgoff_t off, int len)
+{
+	struct f2fs_sb_info *sbi = F2FS_I_SB(inode);
+	struct dnode_of_data dn;
+	int ret, i;
+
+	for (i = 0; i < len; i++, do_replace++, blkaddr++) {
+		if (*do_replace == 0)
+			continue;
+
+		set_new_dnode(&dn, inode, NULL, NULL, 0);
+		ret = f2fs_get_dnode_of_data(&dn, off + i, LOOKUP_NODE_RA);
+		if (ret) {
+			dec_valid_block_count(sbi, inode, 1);
+			f2fs_invalidate_blocks(sbi, *blkaddr);
+		} else {
+			f2fs_update_data_blkaddr(&dn, *blkaddr);
+		}
+		f2fs_put_dnode(&dn);
+	}
+	return 0;
+}
+
+static int __clone_blkaddrs(struct inode *src_inode, struct inode *dst_inode,
+			block_t *blkaddr, int *do_replace,
+			pgoff_t src, pgoff_t dst, pgoff_t len, bool full)
+{
+	struct f2fs_sb_info *sbi = F2FS_I_SB(src_inode);
+	pgoff_t i = 0;
+	int ret;
+
+	while (i < len) {
+		if (blkaddr[i] == NULL_ADDR && !full) {
+			i++;
+			continue;
+		}
+
+		if (do_replace[i] || blkaddr[i] == NULL_ADDR) {
+			struct dnode_of_data dn;
+			struct node_info ni;
+			size_t new_size;
+			pgoff_t ilen;
+
+			set_new_dnode(&dn, dst_inode, NULL, NULL, 0);
+			ret = f2fs_get_dnode_of_data(&dn, dst + i, ALLOC_NODE);
+			if (ret)
+				return ret;
+
+			ret = f2fs_get_node_info(sbi, dn.nid, &ni);
+			if (ret) {
+				f2fs_put_dnode(&dn);
+				return ret;
+			}
+
+			ilen = min((pgoff_t)
+				ADDRS_PER_PAGE(dn.node_page, dst_inode) -
+						dn.ofs_in_node, len - i);
+			do {
+				dn.data_blkaddr = f2fs_data_blkaddr(&dn);
+				f2fs_truncate_data_blocks_range(&dn, 1);
+
+				if (do_replace[i]) {
+					f2fs_i_blocks_write(src_inode,
+							1, false, false);
+					f2fs_i_blocks_write(dst_inode,
+							1, true, false);
+					f2fs_replace_block(sbi, &dn, dn.data_blkaddr,
+					blkaddr[i], ni.version, true, false);
+
+					do_replace[i] = 0;
+				}
+				dn.ofs_in_node++;
+				i++;
+				new_size = (loff_t)(dst + i) << PAGE_SHIFT;
+				if (dst_inode->i_size < new_size)
+					f2fs_i_size_write(dst_inode, new_size);
+			} while (--ilen && (do_replace[i] || blkaddr[i] == NULL_ADDR));
+
+			f2fs_put_dnode(&dn);
+		} else {
+			struct page *psrc, *pdst;
+
+			psrc = f2fs_get_lock_data_page(src_inode,
+							src + i, true);
+			if (IS_ERR(psrc))
+				return PTR_ERR(psrc);
+			pdst = f2fs_get_new_data_page(dst_inode, NULL, dst + i,
+								true);
+			if (IS_ERR(pdst)) {
+				f2fs_put_page(psrc, 1);
+				return PTR_ERR(pdst);
+			}
+			f2fs_copy_page(psrc, pdst);
+			set_page_dirty(pdst);
+			f2fs_put_page(pdst, 1);
+			f2fs_put_page(psrc, 1);
+
+			ret = f2fs_truncate_hole(src_inode,
+						src + i, src + i + 1);
+			if (ret)
+				return ret;
+			i++;
+		}
+	}
+	return 0;
+}
+
+static int __exchange_data_block(struct inode *src_inode,
+			struct inode *dst_inode, pgoff_t src, pgoff_t dst,
+			pgoff_t len, bool full)
+{
+	block_t *src_blkaddr;
+	int *do_replace;
+	pgoff_t olen;
+	int ret;
+
+	while (len) {
+		olen = min((pgoff_t)4 * ADDRS_PER_BLOCK(src_inode), len);
+
+		src_blkaddr = f2fs_kvzalloc(F2FS_I_SB(src_inode),
+					array_size(olen, sizeof(block_t)),
+					GFP_NOFS);
+		if (!src_blkaddr)
+			return -ENOMEM;
+
+		do_replace = f2fs_kvzalloc(F2FS_I_SB(src_inode),
+					array_size(olen, sizeof(int)),
+					GFP_NOFS);
+		if (!do_replace) {
+			kvfree(src_blkaddr);
+			return -ENOMEM;
+		}
+
+		ret = __read_out_blkaddrs(src_inode, src_blkaddr,
+					do_replace, src, olen);
+		if (ret)
+			goto roll_back;
+
+		ret = __clone_blkaddrs(src_inode, dst_inode, src_blkaddr,
+					do_replace, src, dst, olen, full);
+		if (ret)
+			goto roll_back;
+
+		src += olen;
+		dst += olen;
+		len -= olen;
+
+		kvfree(src_blkaddr);
+		kvfree(do_replace);
+	}
+	return 0;
+
+roll_back:
+	__roll_back_blkaddrs(src_inode, src_blkaddr, do_replace, src, olen);
+	kvfree(src_blkaddr);
+	kvfree(do_replace);
+	return ret;
+}
+
+static int f2fs_do_collapse(struct inode *inode, loff_t offset, loff_t len)
+{
+	struct f2fs_sb_info *sbi = F2FS_I_SB(inode);
+	pgoff_t nrpages = DIV_ROUND_UP(i_size_read(inode), PAGE_SIZE);
+	pgoff_t start = offset >> PAGE_SHIFT;
+	pgoff_t end = (offset + len) >> PAGE_SHIFT;
+	int ret;
+
+	f2fs_balance_fs(sbi, true);
+
+	/* avoid gc operation during block exchange */
+	down_write(&F2FS_I(inode)->i_gc_rwsem[WRITE]);
+	down_write(&F2FS_I(inode)->i_mmap_sem);
+
+	f2fs_lock_op(sbi);
+	f2fs_drop_extent_tree(inode);
+	truncate_pagecache(inode, offset);
+	ret = __exchange_data_block(inode, inode, end, start, nrpages - end, true);
+	f2fs_unlock_op(sbi);
+
+	up_write(&F2FS_I(inode)->i_mmap_sem);
+	up_write(&F2FS_I(inode)->i_gc_rwsem[WRITE]);
+	return ret;
+}
+
+static int f2fs_collapse_range(struct inode *inode, loff_t offset, loff_t len)
+{
+	loff_t new_size;
+	int ret;
+
+	if (offset + len >= i_size_read(inode))
+		return -EINVAL;
+
+	/* collapse range should be aligned to block size of f2fs. */
+	if (offset & (F2FS_BLKSIZE - 1) || len & (F2FS_BLKSIZE - 1))
+		return -EINVAL;
+
+	ret = f2fs_convert_inline_inode(inode);
+	if (ret)
+		return ret;
+
+	/* write out all dirty pages from offset */
+	ret = filemap_write_and_wait_range(inode->i_mapping, offset, LLONG_MAX);
+	if (ret)
+		return ret;
+
+	ret = f2fs_do_collapse(inode, offset, len);
+	if (ret)
+		return ret;
+
+	/* write out all moved pages, if possible */
+	down_write(&F2FS_I(inode)->i_mmap_sem);
+	filemap_write_and_wait_range(inode->i_mapping, offset, LLONG_MAX);
+	truncate_pagecache(inode, offset);
+
+	new_size = i_size_read(inode) - len;
+	ret = f2fs_truncate_blocks(inode, new_size, true);
+	up_write(&F2FS_I(inode)->i_mmap_sem);
+	if (!ret)
+		f2fs_i_size_write(inode, new_size);
+	return ret;
+}
+
+static int f2fs_do_zero_range(struct dnode_of_data *dn, pgoff_t start,
+								pgoff_t end)
+{
+	struct f2fs_sb_info *sbi = F2FS_I_SB(dn->inode);
+	pgoff_t index = start;
+	unsigned int ofs_in_node = dn->ofs_in_node;
+	blkcnt_t count = 0;
+	int ret;
+
+	for (; index < end; index++, dn->ofs_in_node++) {
+		if (f2fs_data_blkaddr(dn) == NULL_ADDR)
+			count++;
+	}
+
+	dn->ofs_in_node = ofs_in_node;
+	ret = f2fs_reserve_new_blocks(dn, count);
+	if (ret)
+		return ret;
+
+	dn->ofs_in_node = ofs_in_node;
+	for (index = start; index < end; index++, dn->ofs_in_node++) {
+		dn->data_blkaddr = f2fs_data_blkaddr(dn);
+		/*
+		 * f2fs_reserve_new_blocks will not guarantee entire block
+		 * allocation.
+		 */
+		if (dn->data_blkaddr == NULL_ADDR) {
+			ret = -ENOSPC;
+			break;
+		}
+
+		if (dn->data_blkaddr == NEW_ADDR)
+			continue;
+
+		if (!f2fs_is_valid_blkaddr(sbi, dn->data_blkaddr,
+					DATA_GENERIC_ENHANCE)) {
+			ret = -EFSCORRUPTED;
+			break;
+		}
+
+		f2fs_invalidate_blocks(sbi, dn->data_blkaddr);
+		dn->data_blkaddr = NEW_ADDR;
+		f2fs_set_data_blkaddr(dn);
+	}
+
+	f2fs_update_extent_cache_range(dn, start, 0, index - start);
+
+	return ret;
+}
+
+static int f2fs_zero_range(struct inode *inode, loff_t offset, loff_t len,
+								int mode)
+{
+	struct f2fs_sb_info *sbi = F2FS_I_SB(inode);
+	struct address_space *mapping = inode->i_mapping;
+	pgoff_t index, pg_start, pg_end;
+	loff_t new_size = i_size_read(inode);
+	loff_t off_start, off_end;
+	int ret = 0;
+
+	ret = inode_newsize_ok(inode, (len + offset));
+	if (ret)
+		return ret;
+
+	ret = f2fs_convert_inline_inode(inode);
+	if (ret)
+		return ret;
+
+	ret = filemap_write_and_wait_range(mapping, offset, offset + len - 1);
+	if (ret)
+		return ret;
+
+	pg_start = ((unsigned long long) offset) >> PAGE_SHIFT;
+	pg_end = ((unsigned long long) offset + len) >> PAGE_SHIFT;
+
+	off_start = offset & (PAGE_SIZE - 1);
+	off_end = (offset + len) & (PAGE_SIZE - 1);
+
+	if (pg_start == pg_end) {
+		ret = fill_zero(inode, pg_start, off_start,
+						off_end - off_start);
+		if (ret)
+			return ret;
+
+		new_size = max_t(loff_t, new_size, offset + len);
+	} else {
+		if (off_start) {
+			ret = fill_zero(inode, pg_start++, off_start,
+						PAGE_SIZE - off_start);
+			if (ret)
+				return ret;
+
+			new_size = max_t(loff_t, new_size,
+					(loff_t)pg_start << PAGE_SHIFT);
+		}
+
+		for (index = pg_start; index < pg_end;) {
+			struct dnode_of_data dn;
+			unsigned int end_offset;
+			pgoff_t end;
+
+			down_write(&F2FS_I(inode)->i_gc_rwsem[WRITE]);
+			down_write(&F2FS_I(inode)->i_mmap_sem);
+
+			truncate_pagecache_range(inode,
+				(loff_t)index << PAGE_SHIFT,
+				((loff_t)pg_end << PAGE_SHIFT) - 1);
+
+			f2fs_lock_op(sbi);
+
+			set_new_dnode(&dn, inode, NULL, NULL, 0);
+			ret = f2fs_get_dnode_of_data(&dn, index, ALLOC_NODE);
+			if (ret) {
+				f2fs_unlock_op(sbi);
+				up_write(&F2FS_I(inode)->i_mmap_sem);
+				up_write(&F2FS_I(inode)->i_gc_rwsem[WRITE]);
+				goto out;
+			}
+
+			end_offset = ADDRS_PER_PAGE(dn.node_page, inode);
+			end = min(pg_end, end_offset - dn.ofs_in_node + index);
+
+			ret = f2fs_do_zero_range(&dn, index, end);
+			f2fs_put_dnode(&dn);
+
+			f2fs_unlock_op(sbi);
+			up_write(&F2FS_I(inode)->i_mmap_sem);
+			up_write(&F2FS_I(inode)->i_gc_rwsem[WRITE]);
+
+			f2fs_balance_fs(sbi, dn.node_changed);
+
+			if (ret)
+				goto out;
+
+			index = end;
+			new_size = max_t(loff_t, new_size,
+					(loff_t)index << PAGE_SHIFT);
+		}
+
+		if (off_end) {
+			ret = fill_zero(inode, pg_end, 0, off_end);
+			if (ret)
+				goto out;
+
+			new_size = max_t(loff_t, new_size, offset + len);
+		}
+	}
+
+out:
+	if (new_size > i_size_read(inode)) {
+		if (mode & FALLOC_FL_KEEP_SIZE)
+			file_set_keep_isize(inode);
+		else
+			f2fs_i_size_write(inode, new_size);
+	}
+	return ret;
+}
+
+static int f2fs_insert_range(struct inode *inode, loff_t offset, loff_t len)
+{
+	struct f2fs_sb_info *sbi = F2FS_I_SB(inode);
+	pgoff_t nr, pg_start, pg_end, delta, idx;
+	loff_t new_size;
+	int ret = 0;
+
+	new_size = i_size_read(inode) + len;
+	ret = inode_newsize_ok(inode, new_size);
+	if (ret)
+		return ret;
+
+	if (offset >= i_size_read(inode))
+		return -EINVAL;
+
+	/* insert range should be aligned to block size of f2fs. */
+	if (offset & (F2FS_BLKSIZE - 1) || len & (F2FS_BLKSIZE - 1))
+		return -EINVAL;
+
+	ret = f2fs_convert_inline_inode(inode);
+	if (ret)
+		return ret;
+
+	f2fs_balance_fs(sbi, true);
+
+	down_write(&F2FS_I(inode)->i_mmap_sem);
+	ret = f2fs_truncate_blocks(inode, i_size_read(inode), true);
+	up_write(&F2FS_I(inode)->i_mmap_sem);
+	if (ret)
+		return ret;
+
+	/* write out all dirty pages from offset */
+	ret = filemap_write_and_wait_range(inode->i_mapping, offset, LLONG_MAX);
+	if (ret)
+		return ret;
+
+	pg_start = offset >> PAGE_SHIFT;
+	pg_end = (offset + len) >> PAGE_SHIFT;
+	delta = pg_end - pg_start;
+	idx = DIV_ROUND_UP(i_size_read(inode), PAGE_SIZE);
+
+	/* avoid gc operation during block exchange */
+	down_write(&F2FS_I(inode)->i_gc_rwsem[WRITE]);
+	down_write(&F2FS_I(inode)->i_mmap_sem);
+	truncate_pagecache(inode, offset);
+
+	while (!ret && idx > pg_start) {
+		nr = idx - pg_start;
+		if (nr > delta)
+			nr = delta;
+		idx -= nr;
+
+		f2fs_lock_op(sbi);
+		f2fs_drop_extent_tree(inode);
+
+		ret = __exchange_data_block(inode, inode, idx,
+					idx + delta, nr, false);
+		f2fs_unlock_op(sbi);
+	}
+	up_write(&F2FS_I(inode)->i_mmap_sem);
+	up_write(&F2FS_I(inode)->i_gc_rwsem[WRITE]);
+
+	/* write out all moved pages, if possible */
+	down_write(&F2FS_I(inode)->i_mmap_sem);
+	filemap_write_and_wait_range(inode->i_mapping, offset, LLONG_MAX);
+	truncate_pagecache(inode, offset);
+	up_write(&F2FS_I(inode)->i_mmap_sem);
+
+	if (!ret)
+		f2fs_i_size_write(inode, new_size);
+	return ret;
+}
+
+static int expand_inode_data(struct inode *inode, loff_t offset,
+					loff_t len, int mode)
+{
+	struct f2fs_sb_info *sbi = F2FS_I_SB(inode);
+	struct f2fs_map_blocks map = { .m_next_pgofs = NULL,
+			.m_next_extent = NULL, .m_seg_type = NO_CHECK_TYPE,
+			.m_may_create = true };
+	pgoff_t pg_start, pg_end;
+	loff_t new_size = i_size_read(inode);
+	loff_t off_end;
+	block_t expanded = 0;
+	int err;
+
+	err = inode_newsize_ok(inode, (len + offset));
+	if (err)
+		return err;
+
+	err = f2fs_convert_inline_inode(inode);
+	if (err)
+		return err;
+
+	f2fs_balance_fs(sbi, true);
+
+	pg_start = ((unsigned long long)offset) >> PAGE_SHIFT;
+	pg_end = ((unsigned long long)offset + len) >> PAGE_SHIFT;
+	off_end = (offset + len) & (PAGE_SIZE - 1);
+
+	map.m_lblk = pg_start;
+	map.m_len = pg_end - pg_start;
+	if (off_end)
+		map.m_len++;
+
+	if (!map.m_len)
+		return 0;
+
+	if (f2fs_is_pinned_file(inode)) {
+		block_t sec_blks = BLKS_PER_SEC(sbi);
+		block_t sec_len = roundup(map.m_len, sec_blks);
+
+		map.m_len = sec_blks;
+next_alloc:
+		if (has_not_enough_free_secs(sbi, 0,
+			GET_SEC_FROM_SEG(sbi, overprovision_segments(sbi)))) {
+			down_write(&sbi->gc_lock);
+			err = f2fs_gc(sbi, true, false, false, NULL_SEGNO);
+			if (err && err != -ENODATA && err != -EAGAIN)
+				goto out_err;
+		}
+
+		down_write(&sbi->pin_sem);
+
+		f2fs_lock_op(sbi);
+		f2fs_allocate_new_section(sbi, CURSEG_COLD_DATA_PINNED);
+		f2fs_unlock_op(sbi);
+
+		map.m_seg_type = CURSEG_COLD_DATA_PINNED;
+		err = f2fs_map_blocks(inode, &map, 1, F2FS_GET_BLOCK_PRE_DIO);
+
+		up_write(&sbi->pin_sem);
+
+		expanded += map.m_len;
+		sec_len -= map.m_len;
+		map.m_lblk += map.m_len;
+		if (!err && sec_len)
+			goto next_alloc;
+
+		map.m_len = expanded;
+	} else {
+		err = f2fs_map_blocks(inode, &map, 1, F2FS_GET_BLOCK_PRE_AIO);
+		expanded = map.m_len;
+	}
+out_err:
+	if (err) {
+		pgoff_t last_off;
+
+		if (!expanded)
+			return err;
+
+		last_off = pg_start + expanded - 1;
+
+		/* update new size to the failed position */
+		new_size = (last_off == pg_end) ? offset + len :
+					(loff_t)(last_off + 1) << PAGE_SHIFT;
+	} else {
+		new_size = ((loff_t)pg_end << PAGE_SHIFT) + off_end;
+	}
+
+	if (new_size > i_size_read(inode)) {
+		if (mode & FALLOC_FL_KEEP_SIZE)
+			file_set_keep_isize(inode);
+		else
+			f2fs_i_size_write(inode, new_size);
+	}
+
+	return err;
+}
+
+static long f2fs_fallocate(struct file *file, int mode,
+				loff_t offset, loff_t len)
+{
+	struct inode *inode = file_inode(file);
+	long ret = 0;
+
+	if (unlikely(f2fs_cp_error(F2FS_I_SB(inode))))
+		return -EIO;
+	if (!f2fs_is_checkpoint_ready(F2FS_I_SB(inode)))
+		return -ENOSPC;
+	if (!f2fs_is_compress_backend_ready(inode))
+		return -EOPNOTSUPP;
+
+	/* f2fs only support ->fallocate for regular file */
+	if (!S_ISREG(inode->i_mode))
+		return -EINVAL;
+
+	if (IS_ENCRYPTED(inode) &&
+		(mode & (FALLOC_FL_COLLAPSE_RANGE | FALLOC_FL_INSERT_RANGE)))
+		return -EOPNOTSUPP;
+
+	if (f2fs_compressed_file(inode) &&
+		(mode & (FALLOC_FL_PUNCH_HOLE | FALLOC_FL_COLLAPSE_RANGE |
+			FALLOC_FL_ZERO_RANGE | FALLOC_FL_INSERT_RANGE)))
+		return -EOPNOTSUPP;
+
+	if (mode & ~(FALLOC_FL_KEEP_SIZE | FALLOC_FL_PUNCH_HOLE |
+			FALLOC_FL_COLLAPSE_RANGE | FALLOC_FL_ZERO_RANGE |
+			FALLOC_FL_INSERT_RANGE))
+		return -EOPNOTSUPP;
+
+	inode_lock(inode);
+
+	ret = file_modified(file);
+	if (ret)
+		goto out;
+
+	if (mode & FALLOC_FL_PUNCH_HOLE) {
+		if (offset >= inode->i_size)
+			goto out;
+
+		ret = punch_hole(inode, offset, len);
+	} else if (mode & FALLOC_FL_COLLAPSE_RANGE) {
+		ret = f2fs_collapse_range(inode, offset, len);
+	} else if (mode & FALLOC_FL_ZERO_RANGE) {
+		ret = f2fs_zero_range(inode, offset, len, mode);
+	} else if (mode & FALLOC_FL_INSERT_RANGE) {
+		ret = f2fs_insert_range(inode, offset, len);
+	} else {
+		ret = expand_inode_data(inode, offset, len, mode);
+	}
+
+	if (!ret) {
+		inode->i_mtime = inode->i_ctime = current_time(inode);
+		f2fs_mark_inode_dirty_sync(inode, false);
+		f2fs_update_time(F2FS_I_SB(inode), REQ_TIME);
+	}
+
+out:
+	inode_unlock(inode);
+
+	trace_f2fs_fallocate(inode, mode, offset, len, ret);
+	return ret;
+}
+
+static int f2fs_release_file(struct inode *inode, struct file *filp)
+{
+	/*
+	 * f2fs_relase_file is called at every close calls. So we should
+	 * not drop any inmemory pages by close called by other process.
+	 */
+	if (!(filp->f_mode & FMODE_WRITE) ||
+			atomic_read(&inode->i_writecount) != 1)
+		return 0;
+
+	/* some remained atomic pages should discarded */
+	if (f2fs_is_atomic_file(inode))
+		f2fs_drop_inmem_pages(inode);
+	if (f2fs_is_volatile_file(inode)) {
+		set_inode_flag(inode, FI_DROP_CACHE);
+		filemap_fdatawrite(inode->i_mapping);
+		clear_inode_flag(inode, FI_DROP_CACHE);
+		clear_inode_flag(inode, FI_VOLATILE_FILE);
+		stat_dec_volatile_write(inode);
+	}
+	return 0;
+}
+
+static int f2fs_file_flush(struct file *file, fl_owner_t id)
+{
+	struct inode *inode = file_inode(file);
+
+	/*
+	 * If the process doing a transaction is crashed, we should do
+	 * roll-back. Otherwise, other reader/write can see corrupted database
+	 * until all the writers close its file. Since this should be done
+	 * before dropping file lock, it needs to do in ->flush.
+	 */
+	if (f2fs_is_atomic_file(inode) &&
+			F2FS_I(inode)->inmem_task == current)
+		f2fs_drop_inmem_pages(inode);
+	return 0;
+}
+
+static int f2fs_setflags_common(struct inode *inode, u32 iflags, u32 mask)
+{
+	struct f2fs_inode_info *fi = F2FS_I(inode);
+	u32 masked_flags = fi->i_flags & mask;
+
+	f2fs_bug_on(F2FS_I_SB(inode), (iflags & ~mask));
+
+	/* Is it quota file? Do not allow user to mess with it */
+	if (IS_NOQUOTA(inode))
+		return -EPERM;
+
+	if ((iflags ^ masked_flags) & F2FS_CASEFOLD_FL) {
+		if (!f2fs_sb_has_casefold(F2FS_I_SB(inode)))
+			return -EOPNOTSUPP;
+		if (!f2fs_empty_dir(inode))
+			return -ENOTEMPTY;
+	}
+
+	if (iflags & (F2FS_COMPR_FL | F2FS_NOCOMP_FL)) {
+		if (!f2fs_sb_has_compression(F2FS_I_SB(inode)))
+			return -EOPNOTSUPP;
+		if ((iflags & F2FS_COMPR_FL) && (iflags & F2FS_NOCOMP_FL))
+			return -EINVAL;
+	}
+
+	if ((iflags ^ masked_flags) & F2FS_COMPR_FL) {
+		if (masked_flags & F2FS_COMPR_FL) {
+			if (!f2fs_disable_compressed_file(inode))
+				return -EINVAL;
+		} else {
+			if (!f2fs_may_compress(inode))
+				return -EINVAL;
+			if (S_ISREG(inode->i_mode) && inode->i_size)
+				return -EINVAL;
+
+			set_compress_context(inode);
+		}
+	}
+
+	fi->i_flags = iflags | (fi->i_flags & ~mask);
+	f2fs_bug_on(F2FS_I_SB(inode), (fi->i_flags & F2FS_COMPR_FL) &&
+					(fi->i_flags & F2FS_NOCOMP_FL));
+
+	if (fi->i_flags & F2FS_PROJINHERIT_FL)
+		set_inode_flag(inode, FI_PROJ_INHERIT);
+	else
+		clear_inode_flag(inode, FI_PROJ_INHERIT);
+
+	inode->i_ctime = current_time(inode);
+	f2fs_set_inode_flags(inode);
+	f2fs_mark_inode_dirty_sync(inode, true);
+	return 0;
+}
+
+/* FS_IOC_GETFLAGS and FS_IOC_SETFLAGS support */
+
+/*
+ * To make a new on-disk f2fs i_flag gettable via FS_IOC_GETFLAGS, add an entry
+ * for it to f2fs_fsflags_map[], and add its FS_*_FL equivalent to
+ * F2FS_GETTABLE_FS_FL.  To also make it settable via FS_IOC_SETFLAGS, also add
+ * its FS_*_FL equivalent to F2FS_SETTABLE_FS_FL.
+ */
+
+static const struct {
+	u32 iflag;
+	u32 fsflag;
+} f2fs_fsflags_map[] = {
+	{ F2FS_COMPR_FL,	FS_COMPR_FL },
+	{ F2FS_SYNC_FL,		FS_SYNC_FL },
+	{ F2FS_IMMUTABLE_FL,	FS_IMMUTABLE_FL },
+	{ F2FS_APPEND_FL,	FS_APPEND_FL },
+	{ F2FS_NODUMP_FL,	FS_NODUMP_FL },
+	{ F2FS_NOATIME_FL,	FS_NOATIME_FL },
+	{ F2FS_NOCOMP_FL,	FS_NOCOMP_FL },
+	{ F2FS_INDEX_FL,	FS_INDEX_FL },
+	{ F2FS_DIRSYNC_FL,	FS_DIRSYNC_FL },
+	{ F2FS_PROJINHERIT_FL,	FS_PROJINHERIT_FL },
+	{ F2FS_CASEFOLD_FL,	FS_CASEFOLD_FL },
+};
+
+#define F2FS_GETTABLE_FS_FL (		\
+		FS_COMPR_FL |		\
+		FS_SYNC_FL |		\
+		FS_IMMUTABLE_FL |	\
+		FS_APPEND_FL |		\
+		FS_NODUMP_FL |		\
+		FS_NOATIME_FL |		\
+		FS_NOCOMP_FL |		\
+		FS_INDEX_FL |		\
+		FS_DIRSYNC_FL |		\
+		FS_PROJINHERIT_FL |	\
+		FS_ENCRYPT_FL |		\
+		FS_INLINE_DATA_FL |	\
+		FS_NOCOW_FL |		\
+		FS_VERITY_FL |		\
+		FS_CASEFOLD_FL)
+
+#define F2FS_SETTABLE_FS_FL (		\
+		FS_COMPR_FL |		\
+		FS_SYNC_FL |		\
+		FS_IMMUTABLE_FL |	\
+		FS_APPEND_FL |		\
+		FS_NODUMP_FL |		\
+		FS_NOATIME_FL |		\
+		FS_NOCOMP_FL |		\
+		FS_DIRSYNC_FL |		\
+		FS_PROJINHERIT_FL |	\
+		FS_CASEFOLD_FL)
+
+/* Convert f2fs on-disk i_flags to FS_IOC_{GET,SET}FLAGS flags */
+static inline u32 f2fs_iflags_to_fsflags(u32 iflags)
+{
+	u32 fsflags = 0;
+	int i;
+
+	for (i = 0; i < ARRAY_SIZE(f2fs_fsflags_map); i++)
+		if (iflags & f2fs_fsflags_map[i].iflag)
+			fsflags |= f2fs_fsflags_map[i].fsflag;
+
+	return fsflags;
+}
+
+/* Convert FS_IOC_{GET,SET}FLAGS flags to f2fs on-disk i_flags */
+static inline u32 f2fs_fsflags_to_iflags(u32 fsflags)
+{
+	u32 iflags = 0;
+	int i;
+
+	for (i = 0; i < ARRAY_SIZE(f2fs_fsflags_map); i++)
+		if (fsflags & f2fs_fsflags_map[i].fsflag)
+			iflags |= f2fs_fsflags_map[i].iflag;
+
+	return iflags;
+}
+
+static int f2fs_ioc_getflags(struct file *filp, unsigned long arg)
+{
+	struct inode *inode = file_inode(filp);
+	struct f2fs_inode_info *fi = F2FS_I(inode);
+	u32 fsflags = f2fs_iflags_to_fsflags(fi->i_flags);
+
+	if (IS_ENCRYPTED(inode))
+		fsflags |= FS_ENCRYPT_FL;
+	if (IS_VERITY(inode))
+		fsflags |= FS_VERITY_FL;
+	if (f2fs_has_inline_data(inode) || f2fs_has_inline_dentry(inode))
+		fsflags |= FS_INLINE_DATA_FL;
+	if (is_inode_flag_set(inode, FI_PIN_FILE))
+		fsflags |= FS_NOCOW_FL;
+
+	fsflags &= F2FS_GETTABLE_FS_FL;
+
+	return put_user(fsflags, (int __user *)arg);
+}
+
+static int f2fs_ioc_setflags(struct file *filp, unsigned long arg)
+{
+	struct inode *inode = file_inode(filp);
+	struct f2fs_inode_info *fi = F2FS_I(inode);
+	u32 fsflags, old_fsflags;
+	u32 iflags;
+	int ret;
+
+	if (!inode_owner_or_capable(inode))
+		return -EACCES;
+
+	if (get_user(fsflags, (int __user *)arg))
+		return -EFAULT;
+
+	if (fsflags & ~F2FS_GETTABLE_FS_FL)
+		return -EOPNOTSUPP;
+	fsflags &= F2FS_SETTABLE_FS_FL;
+
+	iflags = f2fs_fsflags_to_iflags(fsflags);
+	if (f2fs_mask_flags(inode->i_mode, iflags) != iflags)
+		return -EOPNOTSUPP;
+
+	ret = mnt_want_write_file(filp);
+	if (ret)
+		return ret;
+
+	inode_lock(inode);
+
+	old_fsflags = f2fs_iflags_to_fsflags(fi->i_flags);
+	ret = vfs_ioc_setflags_prepare(inode, old_fsflags, fsflags);
+	if (ret)
+		goto out;
+
+	ret = f2fs_setflags_common(inode, iflags,
+			f2fs_fsflags_to_iflags(F2FS_SETTABLE_FS_FL));
+out:
+	inode_unlock(inode);
+	mnt_drop_write_file(filp);
+	return ret;
+}
+
+static int f2fs_ioc_getversion(struct file *filp, unsigned long arg)
+{
+	struct inode *inode = file_inode(filp);
+
+	return put_user(inode->i_generation, (int __user *)arg);
+}
+
+static int f2fs_ioc_start_atomic_write(struct file *filp)
+{
+	struct inode *inode = file_inode(filp);
+	struct f2fs_inode_info *fi = F2FS_I(inode);
+	struct f2fs_sb_info *sbi = F2FS_I_SB(inode);
+	int ret;
+
+	if (!inode_owner_or_capable(inode))
+		return -EACCES;
+
+	if (!S_ISREG(inode->i_mode))
+		return -EINVAL;
+
+	if (filp->f_flags & O_DIRECT)
+		return -EINVAL;
+
+	ret = mnt_want_write_file(filp);
+	if (ret)
+		return ret;
+
+	inode_lock(inode);
+
+	if (!f2fs_disable_compressed_file(inode)) {
+		ret = -EINVAL;
+		goto out;
+	}
+
+	if (f2fs_is_atomic_file(inode)) {
+		if (is_inode_flag_set(inode, FI_ATOMIC_REVOKE_REQUEST))
+			ret = -EINVAL;
+		goto out;
+	}
+
+	ret = f2fs_convert_inline_inode(inode);
+	if (ret)
+		goto out;
+
+	down_write(&F2FS_I(inode)->i_gc_rwsem[WRITE]);
+
+	/*
+	 * Should wait end_io to count F2FS_WB_CP_DATA correctly by
+	 * f2fs_is_atomic_file.
+	 */
+	if (get_dirty_pages(inode))
+		f2fs_warn(F2FS_I_SB(inode), "Unexpected flush for atomic writes: ino=%lu, npages=%u",
+			  inode->i_ino, get_dirty_pages(inode));
+	ret = filemap_write_and_wait_range(inode->i_mapping, 0, LLONG_MAX);
+	if (ret) {
+		up_write(&F2FS_I(inode)->i_gc_rwsem[WRITE]);
+		goto out;
+	}
+
+	spin_lock(&sbi->inode_lock[ATOMIC_FILE]);
+	if (list_empty(&fi->inmem_ilist))
+		list_add_tail(&fi->inmem_ilist, &sbi->inode_list[ATOMIC_FILE]);
+	sbi->atomic_files++;
+	spin_unlock(&sbi->inode_lock[ATOMIC_FILE]);
+
+	/* add inode in inmem_list first and set atomic_file */
+	set_inode_flag(inode, FI_ATOMIC_FILE);
+	clear_inode_flag(inode, FI_ATOMIC_REVOKE_REQUEST);
+	up_write(&F2FS_I(inode)->i_gc_rwsem[WRITE]);
+
+	f2fs_update_time(F2FS_I_SB(inode), REQ_TIME);
+	F2FS_I(inode)->inmem_task = current;
+	stat_update_max_atomic_write(inode);
+out:
+	inode_unlock(inode);
+	mnt_drop_write_file(filp);
+	return ret;
+}
+
+static int f2fs_ioc_commit_atomic_write(struct file *filp)
+{
+	struct inode *inode = file_inode(filp);
+	int ret;
+
+	if (!inode_owner_or_capable(inode))
+		return -EACCES;
+
+	ret = mnt_want_write_file(filp);
+	if (ret)
+		return ret;
+
+	f2fs_balance_fs(F2FS_I_SB(inode), true);
+
+	inode_lock(inode);
+
+	if (f2fs_is_volatile_file(inode)) {
+		ret = -EINVAL;
+		goto err_out;
+	}
+
+	if (f2fs_is_atomic_file(inode)) {
+		ret = f2fs_commit_inmem_pages(inode);
+		if (ret)
+			goto err_out;
+
+		ret = f2fs_do_sync_file(filp, 0, LLONG_MAX, 0, true);
+		if (!ret)
+			f2fs_drop_inmem_pages(inode);
+	} else {
+		ret = f2fs_do_sync_file(filp, 0, LLONG_MAX, 1, false);
+	}
+err_out:
+	if (is_inode_flag_set(inode, FI_ATOMIC_REVOKE_REQUEST)) {
+		clear_inode_flag(inode, FI_ATOMIC_REVOKE_REQUEST);
+		ret = -EINVAL;
+	}
+	inode_unlock(inode);
+	mnt_drop_write_file(filp);
+	return ret;
+}
+
+static int f2fs_ioc_start_volatile_write(struct file *filp)
+{
+	struct inode *inode = file_inode(filp);
+	int ret;
+
+	if (!inode_owner_or_capable(inode))
+		return -EACCES;
+
+	if (!S_ISREG(inode->i_mode))
+		return -EINVAL;
+
+	ret = mnt_want_write_file(filp);
+	if (ret)
+		return ret;
+
+	inode_lock(inode);
+
+	if (f2fs_is_volatile_file(inode))
+		goto out;
+
+	ret = f2fs_convert_inline_inode(inode);
+	if (ret)
+		goto out;
+
+	stat_inc_volatile_write(inode);
+	stat_update_max_volatile_write(inode);
+
+	set_inode_flag(inode, FI_VOLATILE_FILE);
+	f2fs_update_time(F2FS_I_SB(inode), REQ_TIME);
+out:
+	inode_unlock(inode);
+	mnt_drop_write_file(filp);
+	return ret;
+}
+
+static int f2fs_ioc_release_volatile_write(struct file *filp)
+{
+	struct inode *inode = file_inode(filp);
+	int ret;
+
+	if (!inode_owner_or_capable(inode))
+		return -EACCES;
+
+	ret = mnt_want_write_file(filp);
+	if (ret)
+		return ret;
+
+	inode_lock(inode);
+
+	if (!f2fs_is_volatile_file(inode))
+		goto out;
+
+	if (!f2fs_is_first_block_written(inode)) {
+		ret = truncate_partial_data_page(inode, 0, true);
+		goto out;
+	}
+
+	ret = punch_hole(inode, 0, F2FS_BLKSIZE);
+out:
+	inode_unlock(inode);
+	mnt_drop_write_file(filp);
+	return ret;
+}
+
+static int f2fs_ioc_abort_volatile_write(struct file *filp)
+{
+	struct inode *inode = file_inode(filp);
+	int ret;
+
+	if (!inode_owner_or_capable(inode))
+		return -EACCES;
+
+	ret = mnt_want_write_file(filp);
+	if (ret)
+		return ret;
+
+	inode_lock(inode);
+
+	if (f2fs_is_atomic_file(inode))
+		f2fs_drop_inmem_pages(inode);
+	if (f2fs_is_volatile_file(inode)) {
+		clear_inode_flag(inode, FI_VOLATILE_FILE);
+		stat_dec_volatile_write(inode);
+		ret = f2fs_do_sync_file(filp, 0, LLONG_MAX, 0, true);
+	}
+
+	clear_inode_flag(inode, FI_ATOMIC_REVOKE_REQUEST);
+
+	inode_unlock(inode);
+
+	mnt_drop_write_file(filp);
+	f2fs_update_time(F2FS_I_SB(inode), REQ_TIME);
+	return ret;
+}
+
+static int f2fs_ioc_shutdown(struct file *filp, unsigned long arg)
+{
+	struct inode *inode = file_inode(filp);
+	struct f2fs_sb_info *sbi = F2FS_I_SB(inode);
+	struct super_block *sb = sbi->sb;
+	__u32 in;
+	int ret = 0;
+
+	if (!capable(CAP_SYS_ADMIN))
+		return -EPERM;
+
+	if (get_user(in, (__u32 __user *)arg))
+		return -EFAULT;
+
+	if (in != F2FS_GOING_DOWN_FULLSYNC) {
+		ret = mnt_want_write_file(filp);
+		if (ret) {
+			if (ret == -EROFS) {
+				ret = 0;
+				f2fs_stop_checkpoint(sbi, false);
+				set_sbi_flag(sbi, SBI_IS_SHUTDOWN);
+				trace_f2fs_shutdown(sbi, in, ret);
+			}
+			return ret;
+		}
+	}
+
+	switch (in) {
+	case F2FS_GOING_DOWN_FULLSYNC:
+		sb = freeze_bdev(sb->s_bdev);
+		if (IS_ERR(sb)) {
+			ret = PTR_ERR(sb);
+			goto out;
+		}
+		if (sb) {
+			f2fs_stop_checkpoint(sbi, false);
+			set_sbi_flag(sbi, SBI_IS_SHUTDOWN);
+			thaw_bdev(sb->s_bdev, sb);
+		}
+		break;
+	case F2FS_GOING_DOWN_METASYNC:
+		/* do checkpoint only */
+		ret = f2fs_sync_fs(sb, 1);
+		if (ret)
+			goto out;
+		f2fs_stop_checkpoint(sbi, false);
+		set_sbi_flag(sbi, SBI_IS_SHUTDOWN);
+		break;
+	case F2FS_GOING_DOWN_NOSYNC:
+		f2fs_stop_checkpoint(sbi, false);
+		set_sbi_flag(sbi, SBI_IS_SHUTDOWN);
+		break;
+	case F2FS_GOING_DOWN_METAFLUSH:
+		f2fs_sync_meta_pages(sbi, META, LONG_MAX, FS_META_IO);
+		f2fs_stop_checkpoint(sbi, false);
+		set_sbi_flag(sbi, SBI_IS_SHUTDOWN);
+		break;
+	case F2FS_GOING_DOWN_NEED_FSCK:
+		set_sbi_flag(sbi, SBI_NEED_FSCK);
+		set_sbi_flag(sbi, SBI_CP_DISABLED_QUICK);
+		set_sbi_flag(sbi, SBI_IS_DIRTY);
+		/* do checkpoint only */
+		ret = f2fs_sync_fs(sb, 1);
+		goto out;
+	default:
+		ret = -EINVAL;
+		goto out;
+	}
+
+	f2fs_stop_gc_thread(sbi);
+	f2fs_stop_discard_thread(sbi);
+
+	f2fs_drop_discard_cmd(sbi);
+	clear_opt(sbi, DISCARD);
+
+	f2fs_update_time(sbi, REQ_TIME);
+out:
+	if (in != F2FS_GOING_DOWN_FULLSYNC)
+		mnt_drop_write_file(filp);
+
+	trace_f2fs_shutdown(sbi, in, ret);
+
+	return ret;
+}
+
+static int f2fs_ioc_fitrim(struct file *filp, unsigned long arg)
+{
+	struct inode *inode = file_inode(filp);
+	struct super_block *sb = inode->i_sb;
+	struct request_queue *q = bdev_get_queue(sb->s_bdev);
+	struct fstrim_range range;
+	int ret;
+
+	if (!capable(CAP_SYS_ADMIN))
+		return -EPERM;
+
+	if (!f2fs_hw_support_discard(F2FS_SB(sb)))
+		return -EOPNOTSUPP;
+
+	if (copy_from_user(&range, (struct fstrim_range __user *)arg,
+				sizeof(range)))
+		return -EFAULT;
+
+	ret = mnt_want_write_file(filp);
+	if (ret)
+		return ret;
+
+	range.minlen = max((unsigned int)range.minlen,
+				q->limits.discard_granularity);
+	ret = f2fs_trim_fs(F2FS_SB(sb), &range);
+	mnt_drop_write_file(filp);
+	if (ret < 0)
+		return ret;
+
+	if (copy_to_user((struct fstrim_range __user *)arg, &range,
+				sizeof(range)))
+		return -EFAULT;
+	f2fs_update_time(F2FS_I_SB(inode), REQ_TIME);
+	return 0;
+}
+
+static bool uuid_is_nonzero(__u8 u[16])
+{
+	int i;
+
+	for (i = 0; i < 16; i++)
+		if (u[i])
+			return true;
+	return false;
+}
+
+static int f2fs_ioc_set_encryption_policy(struct file *filp, unsigned long arg)
+{
+	struct inode *inode = file_inode(filp);
+
+	if (!f2fs_sb_has_encrypt(F2FS_I_SB(inode)))
+		return -EOPNOTSUPP;
+
+	f2fs_update_time(F2FS_I_SB(inode), REQ_TIME);
+
+	return fscrypt_ioctl_set_policy(filp, (const void __user *)arg);
+}
+
+static int f2fs_ioc_get_encryption_policy(struct file *filp, unsigned long arg)
+{
+	if (!f2fs_sb_has_encrypt(F2FS_I_SB(file_inode(filp))))
+		return -EOPNOTSUPP;
+	return fscrypt_ioctl_get_policy(filp, (void __user *)arg);
+}
+
+static int f2fs_ioc_get_encryption_pwsalt(struct file *filp, unsigned long arg)
+{
+	struct inode *inode = file_inode(filp);
+	struct f2fs_sb_info *sbi = F2FS_I_SB(inode);
+	int err;
+
+	if (!f2fs_sb_has_encrypt(sbi))
+		return -EOPNOTSUPP;
+
+	err = mnt_want_write_file(filp);
+	if (err)
+		return err;
+
+	down_write(&sbi->sb_lock);
+
+	if (uuid_is_nonzero(sbi->raw_super->encrypt_pw_salt))
+		goto got_it;
+
+	/* update superblock with uuid */
+	generate_random_uuid(sbi->raw_super->encrypt_pw_salt);
+
+	err = f2fs_commit_super(sbi, false);
+	if (err) {
+		/* undo new data */
+		memset(sbi->raw_super->encrypt_pw_salt, 0, 16);
+		goto out_err;
+	}
+got_it:
+	if (copy_to_user((__u8 __user *)arg, sbi->raw_super->encrypt_pw_salt,
+									16))
+		err = -EFAULT;
+out_err:
+	up_write(&sbi->sb_lock);
+	mnt_drop_write_file(filp);
+	return err;
+}
+
+static int f2fs_ioc_get_encryption_policy_ex(struct file *filp,
+					     unsigned long arg)
+{
+	if (!f2fs_sb_has_encrypt(F2FS_I_SB(file_inode(filp))))
+		return -EOPNOTSUPP;
+
+	return fscrypt_ioctl_get_policy_ex(filp, (void __user *)arg);
+}
+
+static int f2fs_ioc_add_encryption_key(struct file *filp, unsigned long arg)
+{
+	if (!f2fs_sb_has_encrypt(F2FS_I_SB(file_inode(filp))))
+		return -EOPNOTSUPP;
+
+	return fscrypt_ioctl_add_key(filp, (void __user *)arg);
+}
+
+static int f2fs_ioc_remove_encryption_key(struct file *filp, unsigned long arg)
+{
+	if (!f2fs_sb_has_encrypt(F2FS_I_SB(file_inode(filp))))
+		return -EOPNOTSUPP;
+
+	return fscrypt_ioctl_remove_key(filp, (void __user *)arg);
+}
+
+static int f2fs_ioc_remove_encryption_key_all_users(struct file *filp,
+						    unsigned long arg)
+{
+	if (!f2fs_sb_has_encrypt(F2FS_I_SB(file_inode(filp))))
+		return -EOPNOTSUPP;
+
+	return fscrypt_ioctl_remove_key_all_users(filp, (void __user *)arg);
+}
+
+static int f2fs_ioc_get_encryption_key_status(struct file *filp,
+					      unsigned long arg)
+{
+	if (!f2fs_sb_has_encrypt(F2FS_I_SB(file_inode(filp))))
+		return -EOPNOTSUPP;
+
+	return fscrypt_ioctl_get_key_status(filp, (void __user *)arg);
+}
+
+static int f2fs_ioc_get_encryption_nonce(struct file *filp, unsigned long arg)
+{
+	if (!f2fs_sb_has_encrypt(F2FS_I_SB(file_inode(filp))))
+		return -EOPNOTSUPP;
+
+	return fscrypt_ioctl_get_nonce(filp, (void __user *)arg);
+}
+
+static int f2fs_ioc_gc(struct file *filp, unsigned long arg)
+{
+	struct inode *inode = file_inode(filp);
+	struct f2fs_sb_info *sbi = F2FS_I_SB(inode);
+	__u32 sync;
+	int ret;
+
+	if (!capable(CAP_SYS_ADMIN))
+		return -EPERM;
+
+	if (get_user(sync, (__u32 __user *)arg))
+		return -EFAULT;
+
+	if (f2fs_readonly(sbi->sb))
+		return -EROFS;
+
+	ret = mnt_want_write_file(filp);
+	if (ret)
+		return ret;
+
+	if (!sync) {
+		if (!down_write_trylock(&sbi->gc_lock)) {
+			ret = -EBUSY;
+			goto out;
+		}
+	} else {
+		down_write(&sbi->gc_lock);
+	}
+
+	ret = f2fs_gc(sbi, sync, true, false, NULL_SEGNO);
+out:
+	mnt_drop_write_file(filp);
+	return ret;
+}
+
+static int __f2fs_ioc_gc_range(struct file *filp, struct f2fs_gc_range *range)
+{
+	struct f2fs_sb_info *sbi = F2FS_I_SB(file_inode(filp));
+	u64 end;
+	int ret;
+
+	if (!capable(CAP_SYS_ADMIN))
+		return -EPERM;
+	if (f2fs_readonly(sbi->sb))
+		return -EROFS;
+
+	end = range->start + range->len;
+	if (end < range->start || range->start < MAIN_BLKADDR(sbi) ||
+					end >= MAX_BLKADDR(sbi))
+		return -EINVAL;
+
+	ret = mnt_want_write_file(filp);
+	if (ret)
+		return ret;
+
+do_more:
+	if (!range->sync) {
+		if (!down_write_trylock(&sbi->gc_lock)) {
+			ret = -EBUSY;
+			goto out;
+		}
+	} else {
+		down_write(&sbi->gc_lock);
+	}
+
+	ret = f2fs_gc(sbi, range->sync, true, false,
+				GET_SEGNO(sbi, range->start));
+	if (ret) {
+		if (ret == -EBUSY)
+			ret = -EAGAIN;
+		goto out;
+	}
+	range->start += BLKS_PER_SEC(sbi);
+	if (range->start <= end)
+		goto do_more;
+out:
+	mnt_drop_write_file(filp);
+	return ret;
+}
+
+static int f2fs_ioc_gc_range(struct file *filp, unsigned long arg)
+{
+	struct f2fs_gc_range range;
+
+	if (copy_from_user(&range, (struct f2fs_gc_range __user *)arg,
+							sizeof(range)))
+		return -EFAULT;
+	return __f2fs_ioc_gc_range(filp, &range);
+}
+
+static int f2fs_ioc_write_checkpoint(struct file *filp, unsigned long arg)
+{
+	struct inode *inode = file_inode(filp);
+	struct f2fs_sb_info *sbi = F2FS_I_SB(inode);
+	int ret;
+
+	if (!capable(CAP_SYS_ADMIN))
+		return -EPERM;
+
+	if (f2fs_readonly(sbi->sb))
+		return -EROFS;
+
+	if (unlikely(is_sbi_flag_set(sbi, SBI_CP_DISABLED))) {
+		f2fs_info(sbi, "Skipping Checkpoint. Checkpoints currently disabled.");
+		return -EINVAL;
+	}
+
+	ret = mnt_want_write_file(filp);
+	if (ret)
+		return ret;
+
+	ret = f2fs_sync_fs(sbi->sb, 1);
+
+	mnt_drop_write_file(filp);
+	return ret;
+}
+
+static int f2fs_defragment_range(struct f2fs_sb_info *sbi,
+					struct file *filp,
+					struct f2fs_defragment *range)
+{
+	struct inode *inode = file_inode(filp);
+	struct f2fs_map_blocks map = { .m_next_extent = NULL,
+					.m_seg_type = NO_CHECK_TYPE ,
+					.m_may_create = false };
+	struct extent_info ei = {0, 0, 0};
+	pgoff_t pg_start, pg_end, next_pgofs;
+	unsigned int blk_per_seg = sbi->blocks_per_seg;
+	unsigned int total = 0, sec_num;
+	block_t blk_end = 0;
+	bool fragmented = false;
+	int err;
+
+	/* if in-place-update policy is enabled, don't waste time here */
+	if (f2fs_should_update_inplace(inode, NULL))
+		return -EINVAL;
+
+	pg_start = range->start >> PAGE_SHIFT;
+	pg_end = (range->start + range->len) >> PAGE_SHIFT;
+
+	f2fs_balance_fs(sbi, true);
+
+	inode_lock(inode);
+
+	/* writeback all dirty pages in the range */
+	err = filemap_write_and_wait_range(inode->i_mapping, range->start,
+						range->start + range->len - 1);
+	if (err)
+		goto out;
+
+	/*
+	 * lookup mapping info in extent cache, skip defragmenting if physical
+	 * block addresses are continuous.
+	 */
+	if (f2fs_lookup_extent_cache(inode, pg_start, &ei)) {
+		if (ei.fofs + ei.len >= pg_end)
+			goto out;
+	}
+
+	map.m_lblk = pg_start;
+	map.m_next_pgofs = &next_pgofs;
+
+	/*
+	 * lookup mapping info in dnode page cache, skip defragmenting if all
+	 * physical block addresses are continuous even if there are hole(s)
+	 * in logical blocks.
+	 */
+	while (map.m_lblk < pg_end) {
+		map.m_len = pg_end - map.m_lblk;
+		err = f2fs_map_blocks(inode, &map, 0, F2FS_GET_BLOCK_DEFAULT);
+		if (err)
+			goto out;
+
+		if (!(map.m_flags & F2FS_MAP_FLAGS)) {
+			map.m_lblk = next_pgofs;
+			continue;
+		}
+
+		if (blk_end && blk_end != map.m_pblk)
+			fragmented = true;
+
+		/* record total count of block that we're going to move */
+		total += map.m_len;
+
+		blk_end = map.m_pblk + map.m_len;
+
+		map.m_lblk += map.m_len;
+	}
+
+	if (!fragmented) {
+		total = 0;
+		goto out;
+	}
+
+	sec_num = DIV_ROUND_UP(total, BLKS_PER_SEC(sbi));
+
+	/*
+	 * make sure there are enough free section for LFS allocation, this can
+	 * avoid defragment running in SSR mode when free section are allocated
+	 * intensively
+	 */
+	if (has_not_enough_free_secs(sbi, 0, sec_num)) {
+		err = -EAGAIN;
+		goto out;
+	}
+
+	map.m_lblk = pg_start;
+	map.m_len = pg_end - pg_start;
+	total = 0;
+
+	while (map.m_lblk < pg_end) {
+		pgoff_t idx;
+		int cnt = 0;
+
+do_map:
+		map.m_len = pg_end - map.m_lblk;
+		err = f2fs_map_blocks(inode, &map, 0, F2FS_GET_BLOCK_DEFAULT);
+		if (err)
+			goto clear_out;
+
+		if (!(map.m_flags & F2FS_MAP_FLAGS)) {
+			map.m_lblk = next_pgofs;
+			goto check;
+		}
+
+		set_inode_flag(inode, FI_DO_DEFRAG);
+
+		idx = map.m_lblk;
+		while (idx < map.m_lblk + map.m_len && cnt < blk_per_seg) {
+			struct page *page;
+
+			page = f2fs_get_lock_data_page(inode, idx, true);
+			if (IS_ERR(page)) {
+				err = PTR_ERR(page);
+				goto clear_out;
+			}
+
+			set_page_dirty(page);
+			f2fs_put_page(page, 1);
+
+			idx++;
+			cnt++;
+			total++;
+		}
+
+		map.m_lblk = idx;
+check:
+		if (map.m_lblk < pg_end && cnt < blk_per_seg)
+			goto do_map;
+
+		clear_inode_flag(inode, FI_DO_DEFRAG);
+
+		err = filemap_fdatawrite(inode->i_mapping);
+		if (err)
+			goto out;
+	}
+clear_out:
+	clear_inode_flag(inode, FI_DO_DEFRAG);
+out:
+	inode_unlock(inode);
+	if (!err)
+		range->len = (u64)total << PAGE_SHIFT;
+	return err;
+}
+
+static int f2fs_ioc_defragment(struct file *filp, unsigned long arg)
+{
+	struct inode *inode = file_inode(filp);
+	struct f2fs_sb_info *sbi = F2FS_I_SB(inode);
+	struct f2fs_defragment range;
+	int err;
+
+	if (!capable(CAP_SYS_ADMIN))
+		return -EPERM;
+
+	if (!S_ISREG(inode->i_mode) || f2fs_is_atomic_file(inode))
+		return -EINVAL;
+
+	if (f2fs_readonly(sbi->sb))
+		return -EROFS;
+
+	if (copy_from_user(&range, (struct f2fs_defragment __user *)arg,
+							sizeof(range)))
+		return -EFAULT;
+
+	/* verify alignment of offset & size */
+	if (range.start & (F2FS_BLKSIZE - 1) || range.len & (F2FS_BLKSIZE - 1))
+		return -EINVAL;
+
+	if (unlikely((range.start + range.len) >> PAGE_SHIFT >
+					sbi->max_file_blocks))
+		return -EINVAL;
+
+	err = mnt_want_write_file(filp);
+	if (err)
+		return err;
+
+	err = f2fs_defragment_range(sbi, filp, &range);
+	mnt_drop_write_file(filp);
+
+	f2fs_update_time(sbi, REQ_TIME);
+	if (err < 0)
+		return err;
+
+	if (copy_to_user((struct f2fs_defragment __user *)arg, &range,
+							sizeof(range)))
+		return -EFAULT;
+
+	return 0;
+}
+
+static int f2fs_move_file_range(struct file *file_in, loff_t pos_in,
+			struct file *file_out, loff_t pos_out, size_t len)
+{
+	struct inode *src = file_inode(file_in);
+	struct inode *dst = file_inode(file_out);
+	struct f2fs_sb_info *sbi = F2FS_I_SB(src);
+	size_t olen = len, dst_max_i_size = 0;
+	size_t dst_osize;
+	int ret;
+
+	if (file_in->f_path.mnt != file_out->f_path.mnt ||
+				src->i_sb != dst->i_sb)
+		return -EXDEV;
+
+	if (unlikely(f2fs_readonly(src->i_sb)))
+		return -EROFS;
+
+	if (!S_ISREG(src->i_mode) || !S_ISREG(dst->i_mode))
+		return -EINVAL;
+
+	if (IS_ENCRYPTED(src) || IS_ENCRYPTED(dst))
+		return -EOPNOTSUPP;
+
+	if (pos_out < 0 || pos_in < 0)
+		return -EINVAL;
+
+	if (src == dst) {
+		if (pos_in == pos_out)
+			return 0;
+		if (pos_out > pos_in && pos_out < pos_in + len)
+			return -EINVAL;
+	}
+
+	inode_lock(src);
+	if (src != dst) {
+		ret = -EBUSY;
+		if (!inode_trylock(dst))
+			goto out;
+	}
+
+	if (f2fs_compressed_file(src) || f2fs_compressed_file(dst)) {
+		ret = -EOPNOTSUPP;
+		goto out_unlock;
+	}
+
+	ret = -EINVAL;
+	if (pos_in + len > src->i_size || pos_in + len < pos_in)
+		goto out_unlock;
+	if (len == 0)
+		olen = len = src->i_size - pos_in;
+	if (pos_in + len == src->i_size)
+		len = ALIGN(src->i_size, F2FS_BLKSIZE) - pos_in;
+	if (len == 0) {
+		ret = 0;
+		goto out_unlock;
+	}
+
+	dst_osize = dst->i_size;
+	if (pos_out + olen > dst->i_size)
+		dst_max_i_size = pos_out + olen;
+
+	/* verify the end result is block aligned */
+	if (!IS_ALIGNED(pos_in, F2FS_BLKSIZE) ||
+			!IS_ALIGNED(pos_in + len, F2FS_BLKSIZE) ||
+			!IS_ALIGNED(pos_out, F2FS_BLKSIZE))
+		goto out_unlock;
+
+	ret = f2fs_convert_inline_inode(src);
+	if (ret)
+		goto out_unlock;
+
+	ret = f2fs_convert_inline_inode(dst);
+	if (ret)
+		goto out_unlock;
+
+	/* write out all dirty pages from offset */
+	ret = filemap_write_and_wait_range(src->i_mapping,
+					pos_in, pos_in + len);
+	if (ret)
+		goto out_unlock;
+
+	ret = filemap_write_and_wait_range(dst->i_mapping,
+					pos_out, pos_out + len);
+	if (ret)
+		goto out_unlock;
+
+	f2fs_balance_fs(sbi, true);
+
+	down_write(&F2FS_I(src)->i_gc_rwsem[WRITE]);
+	if (src != dst) {
+		ret = -EBUSY;
+		if (!down_write_trylock(&F2FS_I(dst)->i_gc_rwsem[WRITE]))
+			goto out_src;
+	}
+
+	f2fs_lock_op(sbi);
+	ret = __exchange_data_block(src, dst, pos_in >> F2FS_BLKSIZE_BITS,
+				pos_out >> F2FS_BLKSIZE_BITS,
+				len >> F2FS_BLKSIZE_BITS, false);
+
+	if (!ret) {
+		if (dst_max_i_size)
+			f2fs_i_size_write(dst, dst_max_i_size);
+		else if (dst_osize != dst->i_size)
+			f2fs_i_size_write(dst, dst_osize);
+	}
+	f2fs_unlock_op(sbi);
+
+	if (src != dst)
+		up_write(&F2FS_I(dst)->i_gc_rwsem[WRITE]);
+out_src:
+	up_write(&F2FS_I(src)->i_gc_rwsem[WRITE]);
+out_unlock:
+	if (src != dst)
+		inode_unlock(dst);
+out:
+	inode_unlock(src);
+	return ret;
+}
+
+static int __f2fs_ioc_move_range(struct file *filp,
+				struct f2fs_move_range *range)
+{
+	struct fd dst;
+	int err;
+
+	if (!(filp->f_mode & FMODE_READ) ||
+			!(filp->f_mode & FMODE_WRITE))
+		return -EBADF;
+
+	dst = fdget(range->dst_fd);
+	if (!dst.file)
+		return -EBADF;
+
+	if (!(dst.file->f_mode & FMODE_WRITE)) {
+		err = -EBADF;
+		goto err_out;
+	}
+
+	err = mnt_want_write_file(filp);
+	if (err)
+		goto err_out;
+
+	err = f2fs_move_file_range(filp, range->pos_in, dst.file,
+					range->pos_out, range->len);
+
+	mnt_drop_write_file(filp);
+err_out:
+	fdput(dst);
+	return err;
+}
+
+static int f2fs_ioc_move_range(struct file *filp, unsigned long arg)
+{
+	struct f2fs_move_range range;
+
+	if (copy_from_user(&range, (struct f2fs_move_range __user *)arg,
+							sizeof(range)))
+		return -EFAULT;
+	return __f2fs_ioc_move_range(filp, &range);
+}
+
+static int f2fs_ioc_flush_device(struct file *filp, unsigned long arg)
+{
+	struct inode *inode = file_inode(filp);
+	struct f2fs_sb_info *sbi = F2FS_I_SB(inode);
+	struct sit_info *sm = SIT_I(sbi);
+	unsigned int start_segno = 0, end_segno = 0;
+	unsigned int dev_start_segno = 0, dev_end_segno = 0;
+	struct f2fs_flush_device range;
+	int ret;
+
+	if (!capable(CAP_SYS_ADMIN))
+		return -EPERM;
+
+	if (f2fs_readonly(sbi->sb))
+		return -EROFS;
+
+	if (unlikely(is_sbi_flag_set(sbi, SBI_CP_DISABLED)))
+		return -EINVAL;
+
+	if (copy_from_user(&range, (struct f2fs_flush_device __user *)arg,
+							sizeof(range)))
+		return -EFAULT;
+
+	if (!f2fs_is_multi_device(sbi) || sbi->s_ndevs - 1 <= range.dev_num ||
+			__is_large_section(sbi)) {
+		f2fs_warn(sbi, "Can't flush %u in %d for segs_per_sec %u != 1",
+			  range.dev_num, sbi->s_ndevs, sbi->segs_per_sec);
+		return -EINVAL;
+	}
+
+	ret = mnt_want_write_file(filp);
+	if (ret)
+		return ret;
+
+	if (range.dev_num != 0)
+		dev_start_segno = GET_SEGNO(sbi, FDEV(range.dev_num).start_blk);
+	dev_end_segno = GET_SEGNO(sbi, FDEV(range.dev_num).end_blk);
+
+	start_segno = sm->last_victim[FLUSH_DEVICE];
+	if (start_segno < dev_start_segno || start_segno >= dev_end_segno)
+		start_segno = dev_start_segno;
+	end_segno = min(start_segno + range.segments, dev_end_segno);
+
+	while (start_segno < end_segno) {
+		if (!down_write_trylock(&sbi->gc_lock)) {
+			ret = -EBUSY;
+			goto out;
+		}
+		sm->last_victim[GC_CB] = end_segno + 1;
+		sm->last_victim[GC_GREEDY] = end_segno + 1;
+		sm->last_victim[ALLOC_NEXT] = end_segno + 1;
+		ret = f2fs_gc(sbi, true, true, true, start_segno);
+		if (ret == -EAGAIN)
+			ret = 0;
+		else if (ret < 0)
+			break;
+		start_segno++;
+	}
+out:
+	mnt_drop_write_file(filp);
+	return ret;
+}
+
+static int f2fs_ioc_get_features(struct file *filp, unsigned long arg)
+{
+	struct inode *inode = file_inode(filp);
+	u32 sb_feature = le32_to_cpu(F2FS_I_SB(inode)->raw_super->feature);
+
+	/* Must validate to set it with SQLite behavior in Android. */
+	sb_feature |= F2FS_FEATURE_ATOMIC_WRITE;
+
+	return put_user(sb_feature, (u32 __user *)arg);
+}
+
+#ifdef CONFIG_QUOTA
+int f2fs_transfer_project_quota(struct inode *inode, kprojid_t kprojid)
+{
+	struct dquot *transfer_to[MAXQUOTAS] = {};
+	struct f2fs_sb_info *sbi = F2FS_I_SB(inode);
+	struct super_block *sb = sbi->sb;
+	int err;
+
+	transfer_to[PRJQUOTA] = dqget(sb, make_kqid_projid(kprojid));
+	if (IS_ERR(transfer_to[PRJQUOTA]))
+		return PTR_ERR(transfer_to[PRJQUOTA]);
+
+	err = __dquot_transfer(inode, transfer_to);
+	if (err)
+		set_sbi_flag(sbi, SBI_QUOTA_NEED_REPAIR);
+	dqput(transfer_to[PRJQUOTA]);
+	return err;
+}
+
+static int f2fs_ioc_setproject(struct file *filp, __u32 projid)
+{
+	struct inode *inode = file_inode(filp);
+	struct f2fs_inode_info *fi = F2FS_I(inode);
+	struct f2fs_sb_info *sbi = F2FS_I_SB(inode);
+	struct page *ipage;
+	kprojid_t kprojid;
+	int err;
+
+	if (!f2fs_sb_has_project_quota(sbi)) {
+		if (projid != F2FS_DEF_PROJID)
+			return -EOPNOTSUPP;
+		else
+			return 0;
+	}
+
+	if (!f2fs_has_extra_attr(inode))
+		return -EOPNOTSUPP;
+
+	kprojid = make_kprojid(&init_user_ns, (projid_t)projid);
+
+	if (projid_eq(kprojid, F2FS_I(inode)->i_projid))
+		return 0;
+
+	err = -EPERM;
+	/* Is it quota file? Do not allow user to mess with it */
+	if (IS_NOQUOTA(inode))
+		return err;
+
+	ipage = f2fs_get_node_page(sbi, inode->i_ino);
+	if (IS_ERR(ipage))
+		return PTR_ERR(ipage);
+
+	if (!F2FS_FITS_IN_INODE(F2FS_INODE(ipage), fi->i_extra_isize,
+								i_projid)) {
+		err = -EOVERFLOW;
+		f2fs_put_page(ipage, 1);
+		return err;
+	}
+	f2fs_put_page(ipage, 1);
+
+	err = dquot_initialize(inode);
+	if (err)
+		return err;
+
+	f2fs_lock_op(sbi);
+	err = f2fs_transfer_project_quota(inode, kprojid);
+	if (err)
+		goto out_unlock;
+
+	F2FS_I(inode)->i_projid = kprojid;
+	inode->i_ctime = current_time(inode);
+	f2fs_mark_inode_dirty_sync(inode, true);
+out_unlock:
+	f2fs_unlock_op(sbi);
+	return err;
+}
+#else
+int f2fs_transfer_project_quota(struct inode *inode, kprojid_t kprojid)
+{
+	return 0;
+}
+
+static int f2fs_ioc_setproject(struct file *filp, __u32 projid)
+{
+	if (projid != F2FS_DEF_PROJID)
+		return -EOPNOTSUPP;
+	return 0;
+}
+#endif
+
+/* FS_IOC_FSGETXATTR and FS_IOC_FSSETXATTR support */
+
+/*
+ * To make a new on-disk f2fs i_flag gettable via FS_IOC_FSGETXATTR and settable
+ * via FS_IOC_FSSETXATTR, add an entry for it to f2fs_xflags_map[], and add its
+ * FS_XFLAG_* equivalent to F2FS_SUPPORTED_XFLAGS.
+ */
+
+static const struct {
+	u32 iflag;
+	u32 xflag;
+} f2fs_xflags_map[] = {
+	{ F2FS_SYNC_FL,		FS_XFLAG_SYNC },
+	{ F2FS_IMMUTABLE_FL,	FS_XFLAG_IMMUTABLE },
+	{ F2FS_APPEND_FL,	FS_XFLAG_APPEND },
+	{ F2FS_NODUMP_FL,	FS_XFLAG_NODUMP },
+	{ F2FS_NOATIME_FL,	FS_XFLAG_NOATIME },
+	{ F2FS_PROJINHERIT_FL,	FS_XFLAG_PROJINHERIT },
+};
+
+#define F2FS_SUPPORTED_XFLAGS (		\
+		FS_XFLAG_SYNC |		\
+		FS_XFLAG_IMMUTABLE |	\
+		FS_XFLAG_APPEND |	\
+		FS_XFLAG_NODUMP |	\
+		FS_XFLAG_NOATIME |	\
+		FS_XFLAG_PROJINHERIT)
+
+/* Convert f2fs on-disk i_flags to FS_IOC_FS{GET,SET}XATTR flags */
+static inline u32 f2fs_iflags_to_xflags(u32 iflags)
+{
+	u32 xflags = 0;
+	int i;
+
+	for (i = 0; i < ARRAY_SIZE(f2fs_xflags_map); i++)
+		if (iflags & f2fs_xflags_map[i].iflag)
+			xflags |= f2fs_xflags_map[i].xflag;
+
+	return xflags;
+}
+
+/* Convert FS_IOC_FS{GET,SET}XATTR flags to f2fs on-disk i_flags */
+static inline u32 f2fs_xflags_to_iflags(u32 xflags)
+{
+	u32 iflags = 0;
+	int i;
+
+	for (i = 0; i < ARRAY_SIZE(f2fs_xflags_map); i++)
+		if (xflags & f2fs_xflags_map[i].xflag)
+			iflags |= f2fs_xflags_map[i].iflag;
+
+	return iflags;
+}
+
+static void f2fs_fill_fsxattr(struct inode *inode, struct fsxattr *fa)
+{
+	struct f2fs_inode_info *fi = F2FS_I(inode);
+
+	simple_fill_fsxattr(fa, f2fs_iflags_to_xflags(fi->i_flags));
+
+	if (f2fs_sb_has_project_quota(F2FS_I_SB(inode)))
+		fa->fsx_projid = from_kprojid(&init_user_ns, fi->i_projid);
+}
+
+static int f2fs_ioc_fsgetxattr(struct file *filp, unsigned long arg)
+{
+	struct inode *inode = file_inode(filp);
+	struct fsxattr fa;
+
+	f2fs_fill_fsxattr(inode, &fa);
+
+	if (copy_to_user((struct fsxattr __user *)arg, &fa, sizeof(fa)))
+		return -EFAULT;
+	return 0;
+}
+
+static int f2fs_ioc_fssetxattr(struct file *filp, unsigned long arg)
+{
+	struct inode *inode = file_inode(filp);
+	struct fsxattr fa, old_fa;
+	u32 iflags;
+	int err;
+
+	if (copy_from_user(&fa, (struct fsxattr __user *)arg, sizeof(fa)))
+		return -EFAULT;
+
+	/* Make sure caller has proper permission */
+	if (!inode_owner_or_capable(inode))
+		return -EACCES;
+
+	if (fa.fsx_xflags & ~F2FS_SUPPORTED_XFLAGS)
+		return -EOPNOTSUPP;
+
+	iflags = f2fs_xflags_to_iflags(fa.fsx_xflags);
+	if (f2fs_mask_flags(inode->i_mode, iflags) != iflags)
+		return -EOPNOTSUPP;
+
+	err = mnt_want_write_file(filp);
+	if (err)
+		return err;
+
+	inode_lock(inode);
+
+	f2fs_fill_fsxattr(inode, &old_fa);
+	err = vfs_ioc_fssetxattr_check(inode, &old_fa, &fa);
+	if (err)
+		goto out;
+
+	err = f2fs_setflags_common(inode, iflags,
+			f2fs_xflags_to_iflags(F2FS_SUPPORTED_XFLAGS));
+	if (err)
+		goto out;
+
+	err = f2fs_ioc_setproject(filp, fa.fsx_projid);
+out:
+	inode_unlock(inode);
+	mnt_drop_write_file(filp);
+	return err;
+}
+
+int f2fs_pin_file_control(struct inode *inode, bool inc)
+{
+	struct f2fs_inode_info *fi = F2FS_I(inode);
+	struct f2fs_sb_info *sbi = F2FS_I_SB(inode);
+
+	/* Use i_gc_failures for normal file as a risk signal. */
+	if (inc)
+		f2fs_i_gc_failures_write(inode,
+				fi->i_gc_failures[GC_FAILURE_PIN] + 1);
+
+	if (fi->i_gc_failures[GC_FAILURE_PIN] > sbi->gc_pin_file_threshold) {
+		f2fs_warn(sbi, "%s: Enable GC = ino %lx after %x GC trials",
+			  __func__, inode->i_ino,
+			  fi->i_gc_failures[GC_FAILURE_PIN]);
+		clear_inode_flag(inode, FI_PIN_FILE);
+		return -EAGAIN;
+	}
+	return 0;
+}
+
+static int f2fs_ioc_set_pin_file(struct file *filp, unsigned long arg)
+{
+	struct inode *inode = file_inode(filp);
+	__u32 pin;
+	int ret = 0;
+
+	if (get_user(pin, (__u32 __user *)arg))
+		return -EFAULT;
+
+	if (!S_ISREG(inode->i_mode))
+		return -EINVAL;
+
+	if (f2fs_readonly(F2FS_I_SB(inode)->sb))
+		return -EROFS;
+
+	ret = mnt_want_write_file(filp);
+	if (ret)
+		return ret;
+
+	inode_lock(inode);
+
+	if (f2fs_should_update_outplace(inode, NULL)) {
+		ret = -EINVAL;
+		goto out;
+	}
+
+	if (!pin) {
+		clear_inode_flag(inode, FI_PIN_FILE);
+		f2fs_i_gc_failures_write(inode, 0);
+		goto done;
+	}
+
+	if (f2fs_pin_file_control(inode, false)) {
+		ret = -EAGAIN;
+		goto out;
+	}
+
+	ret = f2fs_convert_inline_inode(inode);
+	if (ret)
+		goto out;
+
+	if (!f2fs_disable_compressed_file(inode)) {
+		ret = -EOPNOTSUPP;
+		goto out;
+	}
+
+	set_inode_flag(inode, FI_PIN_FILE);
+	ret = F2FS_I(inode)->i_gc_failures[GC_FAILURE_PIN];
+done:
+	f2fs_update_time(F2FS_I_SB(inode), REQ_TIME);
+out:
+	inode_unlock(inode);
+	mnt_drop_write_file(filp);
+	return ret;
+}
+
+static int f2fs_ioc_get_pin_file(struct file *filp, unsigned long arg)
+{
+	struct inode *inode = file_inode(filp);
+	__u32 pin = 0;
+
+	if (is_inode_flag_set(inode, FI_PIN_FILE))
+		pin = F2FS_I(inode)->i_gc_failures[GC_FAILURE_PIN];
+	return put_user(pin, (u32 __user *)arg);
+}
+
+int f2fs_precache_extents(struct inode *inode)
+{
+	struct f2fs_inode_info *fi = F2FS_I(inode);
+	struct f2fs_map_blocks map;
+	pgoff_t m_next_extent;
+	loff_t end;
+	int err;
+
+	if (is_inode_flag_set(inode, FI_NO_EXTENT))
+		return -EOPNOTSUPP;
+
+	map.m_lblk = 0;
+	map.m_pblk = 0;
+	map.m_next_pgofs = NULL;
+	map.m_next_extent = &m_next_extent;
+	map.m_seg_type = NO_CHECK_TYPE;
+	map.m_may_create = false;
+	end = F2FS_I_SB(inode)->max_file_blocks;
+
+	while (map.m_lblk < end) {
+		map.m_len = end - map.m_lblk;
+
+		down_write(&fi->i_gc_rwsem[WRITE]);
+		err = f2fs_map_blocks(inode, &map, 0, F2FS_GET_BLOCK_PRECACHE);
+		up_write(&fi->i_gc_rwsem[WRITE]);
+		if (err)
+			return err;
+
+		map.m_lblk = m_next_extent;
+	}
+
+	return err;
+}
+
+static int f2fs_ioc_precache_extents(struct file *filp, unsigned long arg)
+{
+	return f2fs_precache_extents(file_inode(filp));
+}
+
+static int f2fs_ioc_resize_fs(struct file *filp, unsigned long arg)
+{
+	struct f2fs_sb_info *sbi = F2FS_I_SB(file_inode(filp));
+	__u64 block_count;
+
+	if (!capable(CAP_SYS_ADMIN))
+		return -EPERM;
+
+	if (f2fs_readonly(sbi->sb))
+		return -EROFS;
+
+	if (copy_from_user(&block_count, (void __user *)arg,
+			   sizeof(block_count)))
+		return -EFAULT;
+
+	return f2fs_resize_fs(filp, block_count);
+}
+
+static int f2fs_ioc_enable_verity(struct file *filp, unsigned long arg)
+{
+	struct inode *inode = file_inode(filp);
+
+	f2fs_update_time(F2FS_I_SB(inode), REQ_TIME);
+
+	if (!f2fs_sb_has_verity(F2FS_I_SB(inode))) {
+		f2fs_warn(F2FS_I_SB(inode),
+			  "Can't enable fs-verity on inode %lu: the verity feature is not enabled on this filesystem.\n",
+			  inode->i_ino);
+		return -EOPNOTSUPP;
+	}
+
+	return fsverity_ioctl_enable(filp, (const void __user *)arg);
+}
+
+static int f2fs_ioc_measure_verity(struct file *filp, unsigned long arg)
+{
+	if (!f2fs_sb_has_verity(F2FS_I_SB(file_inode(filp))))
+		return -EOPNOTSUPP;
+
+	return fsverity_ioctl_measure(filp, (void __user *)arg);
+}
+
+static int f2fs_ioc_getfslabel(struct file *filp, unsigned long arg)
+{
+	struct inode *inode = file_inode(filp);
+	struct f2fs_sb_info *sbi = F2FS_I_SB(inode);
+	char *vbuf;
+	int count;
+	int err = 0;
+
+	vbuf = f2fs_kzalloc(sbi, MAX_VOLUME_NAME, GFP_KERNEL);
+	if (!vbuf)
+		return -ENOMEM;
+
+	down_read(&sbi->sb_lock);
+	count = utf16s_to_utf8s(sbi->raw_super->volume_name,
+			ARRAY_SIZE(sbi->raw_super->volume_name),
+			UTF16_LITTLE_ENDIAN, vbuf, MAX_VOLUME_NAME);
+	up_read(&sbi->sb_lock);
+
+	if (copy_to_user((char __user *)arg, vbuf,
+				min(FSLABEL_MAX, count)))
+		err = -EFAULT;
+
+	kfree(vbuf);
+	return err;
+}
+
+static int f2fs_ioc_setfslabel(struct file *filp, unsigned long arg)
+{
+	struct inode *inode = file_inode(filp);
+	struct f2fs_sb_info *sbi = F2FS_I_SB(inode);
+	char *vbuf;
+	int err = 0;
+
+	if (!capable(CAP_SYS_ADMIN))
+		return -EPERM;
+
+	vbuf = strndup_user((const char __user *)arg, FSLABEL_MAX);
+	if (IS_ERR(vbuf))
+		return PTR_ERR(vbuf);
+
+	err = mnt_want_write_file(filp);
+	if (err)
+		goto out;
+
+	down_write(&sbi->sb_lock);
+
+	memset(sbi->raw_super->volume_name, 0,
+			sizeof(sbi->raw_super->volume_name));
+	utf8s_to_utf16s(vbuf, strlen(vbuf), UTF16_LITTLE_ENDIAN,
+			sbi->raw_super->volume_name,
+			ARRAY_SIZE(sbi->raw_super->volume_name));
+
+	err = f2fs_commit_super(sbi, false);
+
+	up_write(&sbi->sb_lock);
+
+	mnt_drop_write_file(filp);
+out:
+	kfree(vbuf);
+	return err;
+}
+
+static int f2fs_get_compress_blocks(struct file *filp, unsigned long arg)
+{
+	struct inode *inode = file_inode(filp);
+	__u64 blocks;
+
+	if (!f2fs_sb_has_compression(F2FS_I_SB(inode)))
+		return -EOPNOTSUPP;
+
+	if (!f2fs_compressed_file(inode))
+		return -EINVAL;
+
+	blocks = atomic_read(&F2FS_I(inode)->i_compr_blocks);
+	return put_user(blocks, (u64 __user *)arg);
+}
+
+static int release_compress_blocks(struct dnode_of_data *dn, pgoff_t count)
+{
+	struct f2fs_sb_info *sbi = F2FS_I_SB(dn->inode);
+	unsigned int released_blocks = 0;
+	int cluster_size = F2FS_I(dn->inode)->i_cluster_size;
+	block_t blkaddr;
+	int i;
+
+	for (i = 0; i < count; i++) {
+		blkaddr = data_blkaddr(dn->inode, dn->node_page,
+						dn->ofs_in_node + i);
+
+		if (!__is_valid_data_blkaddr(blkaddr))
+			continue;
+		if (unlikely(!f2fs_is_valid_blkaddr(sbi, blkaddr,
+					DATA_GENERIC_ENHANCE)))
+			return -EFSCORRUPTED;
+	}
+
+	while (count) {
+		int compr_blocks = 0;
+
+		for (i = 0; i < cluster_size; i++, dn->ofs_in_node++) {
+			blkaddr = f2fs_data_blkaddr(dn);
+
+			if (i == 0) {
+				if (blkaddr == COMPRESS_ADDR)
+					continue;
+				dn->ofs_in_node += cluster_size;
+				goto next;
+			}
+
+			if (__is_valid_data_blkaddr(blkaddr))
+				compr_blocks++;
+
+			if (blkaddr != NEW_ADDR)
+				continue;
+
+			dn->data_blkaddr = NULL_ADDR;
+			f2fs_set_data_blkaddr(dn);
+		}
+
+		f2fs_i_compr_blocks_update(dn->inode, compr_blocks, false);
+		dec_valid_block_count(sbi, dn->inode,
+					cluster_size - compr_blocks);
+
+		released_blocks += cluster_size - compr_blocks;
+next:
+		count -= cluster_size;
+	}
+
+	return released_blocks;
+}
+
+static int f2fs_release_compress_blocks(struct file *filp, unsigned long arg)
+{
+	struct inode *inode = file_inode(filp);
+	struct f2fs_sb_info *sbi = F2FS_I_SB(inode);
+	pgoff_t page_idx = 0, last_idx;
+	unsigned int released_blocks = 0;
+	int ret;
+	int writecount;
+
+	if (!f2fs_sb_has_compression(F2FS_I_SB(inode)))
+		return -EOPNOTSUPP;
+
+	if (!f2fs_compressed_file(inode))
+		return -EINVAL;
+
+	if (f2fs_readonly(sbi->sb))
+		return -EROFS;
+
+	ret = mnt_want_write_file(filp);
+	if (ret)
+		return ret;
+
+	f2fs_balance_fs(F2FS_I_SB(inode), true);
+
+	inode_lock(inode);
+
+	writecount = atomic_read(&inode->i_writecount);
+	if ((filp->f_mode & FMODE_WRITE && writecount != 1) ||
+			(!(filp->f_mode & FMODE_WRITE) && writecount)) {
+		ret = -EBUSY;
+		goto out;
+	}
+
+	if (IS_IMMUTABLE(inode)) {
+		ret = -EINVAL;
+		goto out;
+	}
+
+	ret = filemap_write_and_wait_range(inode->i_mapping, 0, LLONG_MAX);
+	if (ret)
+		goto out;
+
+	F2FS_I(inode)->i_flags |= F2FS_IMMUTABLE_FL;
+	f2fs_set_inode_flags(inode);
+	inode->i_ctime = current_time(inode);
+	f2fs_mark_inode_dirty_sync(inode, true);
+
+	if (!atomic_read(&F2FS_I(inode)->i_compr_blocks))
+		goto out;
+
+	down_write(&F2FS_I(inode)->i_gc_rwsem[WRITE]);
+	down_write(&F2FS_I(inode)->i_mmap_sem);
+
+	last_idx = DIV_ROUND_UP(i_size_read(inode), PAGE_SIZE);
+
+	while (page_idx < last_idx) {
+		struct dnode_of_data dn;
+		pgoff_t end_offset, count;
+
+		set_new_dnode(&dn, inode, NULL, NULL, 0);
+		ret = f2fs_get_dnode_of_data(&dn, page_idx, LOOKUP_NODE);
+		if (ret) {
+			if (ret == -ENOENT) {
+				page_idx = f2fs_get_next_page_offset(&dn,
+								page_idx);
+				ret = 0;
+				continue;
+			}
+			break;
+		}
+
+		end_offset = ADDRS_PER_PAGE(dn.node_page, inode);
+		count = min(end_offset - dn.ofs_in_node, last_idx - page_idx);
+		count = round_up(count, F2FS_I(inode)->i_cluster_size);
+
+		ret = release_compress_blocks(&dn, count);
+
+		f2fs_put_dnode(&dn);
+
+		if (ret < 0)
+			break;
+
+		page_idx += count;
+		released_blocks += ret;
+	}
+
+	up_write(&F2FS_I(inode)->i_gc_rwsem[WRITE]);
+	up_write(&F2FS_I(inode)->i_mmap_sem);
+out:
+	inode_unlock(inode);
+
+	mnt_drop_write_file(filp);
+
+	if (ret >= 0) {
+		ret = put_user(released_blocks, (u64 __user *)arg);
+	} else if (released_blocks &&
+			atomic_read(&F2FS_I(inode)->i_compr_blocks)) {
+		set_sbi_flag(sbi, SBI_NEED_FSCK);
+		f2fs_warn(sbi, "%s: partial blocks were released i_ino=%lx "
+			"iblocks=%llu, released=%u, compr_blocks=%u, "
+			"run fsck to fix.",
+			__func__, inode->i_ino, inode->i_blocks,
+			released_blocks,
+			atomic_read(&F2FS_I(inode)->i_compr_blocks));
+	}
+
+	return ret;
+}
+
+static int reserve_compress_blocks(struct dnode_of_data *dn, pgoff_t count)
+{
+	struct f2fs_sb_info *sbi = F2FS_I_SB(dn->inode);
+	unsigned int reserved_blocks = 0;
+	int cluster_size = F2FS_I(dn->inode)->i_cluster_size;
+	block_t blkaddr;
+	int i;
+
+	for (i = 0; i < count; i++) {
+		blkaddr = data_blkaddr(dn->inode, dn->node_page,
+						dn->ofs_in_node + i);
+
+		if (!__is_valid_data_blkaddr(blkaddr))
+			continue;
+		if (unlikely(!f2fs_is_valid_blkaddr(sbi, blkaddr,
+					DATA_GENERIC_ENHANCE)))
+			return -EFSCORRUPTED;
+	}
+
+	while (count) {
+		int compr_blocks = 0;
+		blkcnt_t reserved;
+		int ret;
+
+		for (i = 0; i < cluster_size; i++, dn->ofs_in_node++) {
+			blkaddr = f2fs_data_blkaddr(dn);
+
+			if (i == 0) {
+				if (blkaddr == COMPRESS_ADDR)
+					continue;
+				dn->ofs_in_node += cluster_size;
+				goto next;
+			}
+
+			if (__is_valid_data_blkaddr(blkaddr)) {
+				compr_blocks++;
+				continue;
+			}
+
+			dn->data_blkaddr = NEW_ADDR;
+			f2fs_set_data_blkaddr(dn);
+		}
+
+		reserved = cluster_size - compr_blocks;
+		ret = inc_valid_block_count(sbi, dn->inode, &reserved);
+		if (ret)
+			return ret;
+
+		if (reserved != cluster_size - compr_blocks)
+			return -ENOSPC;
+
+		f2fs_i_compr_blocks_update(dn->inode, compr_blocks, true);
+
+		reserved_blocks += reserved;
+next:
+		count -= cluster_size;
+	}
+
+	return reserved_blocks;
+}
+
+static int f2fs_reserve_compress_blocks(struct file *filp, unsigned long arg)
+{
+	struct inode *inode = file_inode(filp);
+	struct f2fs_sb_info *sbi = F2FS_I_SB(inode);
+	pgoff_t page_idx = 0, last_idx;
+	unsigned int reserved_blocks = 0;
+	int ret;
+
+	if (!f2fs_sb_has_compression(F2FS_I_SB(inode)))
+		return -EOPNOTSUPP;
+
+	if (!f2fs_compressed_file(inode))
+		return -EINVAL;
+
+	if (f2fs_readonly(sbi->sb))
+		return -EROFS;
+
+	ret = mnt_want_write_file(filp);
+	if (ret)
+		return ret;
+
+	if (atomic_read(&F2FS_I(inode)->i_compr_blocks))
+		goto out;
+
+	f2fs_balance_fs(F2FS_I_SB(inode), true);
+
+	inode_lock(inode);
+
+	if (!IS_IMMUTABLE(inode)) {
+		ret = -EINVAL;
+		goto unlock_inode;
+	}
+
+	down_write(&F2FS_I(inode)->i_gc_rwsem[WRITE]);
+	down_write(&F2FS_I(inode)->i_mmap_sem);
+
+	last_idx = DIV_ROUND_UP(i_size_read(inode), PAGE_SIZE);
+
+	while (page_idx < last_idx) {
+		struct dnode_of_data dn;
+		pgoff_t end_offset, count;
+
+		set_new_dnode(&dn, inode, NULL, NULL, 0);
+		ret = f2fs_get_dnode_of_data(&dn, page_idx, LOOKUP_NODE);
+		if (ret) {
+			if (ret == -ENOENT) {
+				page_idx = f2fs_get_next_page_offset(&dn,
+								page_idx);
+				ret = 0;
+				continue;
+			}
+			break;
+		}
+
+		end_offset = ADDRS_PER_PAGE(dn.node_page, inode);
+		count = min(end_offset - dn.ofs_in_node, last_idx - page_idx);
+		count = round_up(count, F2FS_I(inode)->i_cluster_size);
+
+		ret = reserve_compress_blocks(&dn, count);
+
+		f2fs_put_dnode(&dn);
+
+		if (ret < 0)
+			break;
+
+		page_idx += count;
+		reserved_blocks += ret;
+	}
+
+	up_write(&F2FS_I(inode)->i_gc_rwsem[WRITE]);
+	up_write(&F2FS_I(inode)->i_mmap_sem);
+
+	if (ret >= 0) {
+		F2FS_I(inode)->i_flags &= ~F2FS_IMMUTABLE_FL;
+		f2fs_set_inode_flags(inode);
+		inode->i_ctime = current_time(inode);
+		f2fs_mark_inode_dirty_sync(inode, true);
+	}
+unlock_inode:
+	inode_unlock(inode);
+out:
+	mnt_drop_write_file(filp);
+
+	if (ret >= 0) {
+		ret = put_user(reserved_blocks, (u64 __user *)arg);
+	} else if (reserved_blocks &&
+			atomic_read(&F2FS_I(inode)->i_compr_blocks)) {
+		set_sbi_flag(sbi, SBI_NEED_FSCK);
+		f2fs_warn(sbi, "%s: partial blocks were released i_ino=%lx "
+			"iblocks=%llu, reserved=%u, compr_blocks=%u, "
+			"run fsck to fix.",
+			__func__, inode->i_ino, inode->i_blocks,
+			reserved_blocks,
+			atomic_read(&F2FS_I(inode)->i_compr_blocks));
+	}
+
+	return ret;
+}
+
+static int f2fs_secure_erase(struct block_device *bdev, struct inode *inode,
+		pgoff_t off, block_t block, block_t len, u32 flags)
+{
+	struct request_queue *q = bdev_get_queue(bdev);
+	sector_t sector = SECTOR_FROM_BLOCK(block);
+	sector_t nr_sects = SECTOR_FROM_BLOCK(len);
+	int ret = 0;
+
+	if (!q)
+		return -ENXIO;
+
+	if (flags & F2FS_TRIM_FILE_DISCARD)
+		ret = blkdev_issue_discard(bdev, sector, nr_sects, GFP_NOFS,
+						blk_queue_secure_erase(q) ?
+						BLKDEV_DISCARD_SECURE : 0);
+
+	if (!ret && (flags & F2FS_TRIM_FILE_ZEROOUT)) {
+		if (IS_ENCRYPTED(inode))
+			ret = fscrypt_zeroout_range(inode, off, block, len);
+		else
+			ret = blkdev_issue_zeroout(bdev, sector, nr_sects,
+					GFP_NOFS, 0);
+	}
+
+	return ret;
+}
+
+static int f2fs_sec_trim_file(struct file *filp, unsigned long arg)
+{
+	struct inode *inode = file_inode(filp);
+	struct f2fs_sb_info *sbi = F2FS_I_SB(inode);
+	struct address_space *mapping = inode->i_mapping;
+	struct block_device *prev_bdev = NULL;
+	struct f2fs_sectrim_range range;
+	pgoff_t index, pg_end, prev_index = 0;
+	block_t prev_block = 0, len = 0;
+	loff_t end_addr;
+	bool to_end = false;
+	int ret = 0;
+
+	if (!(filp->f_mode & FMODE_WRITE))
+		return -EBADF;
+
+	if (copy_from_user(&range, (struct f2fs_sectrim_range __user *)arg,
+				sizeof(range)))
+		return -EFAULT;
+
+	if (range.flags == 0 || (range.flags & ~F2FS_TRIM_FILE_MASK) ||
+			!S_ISREG(inode->i_mode))
+		return -EINVAL;
+
+	if (((range.flags & F2FS_TRIM_FILE_DISCARD) &&
+			!f2fs_hw_support_discard(sbi)) ||
+			((range.flags & F2FS_TRIM_FILE_ZEROOUT) &&
+			 IS_ENCRYPTED(inode) && f2fs_is_multi_device(sbi)))
+		return -EOPNOTSUPP;
+
+	file_start_write(filp);
+	inode_lock(inode);
+
+	if (f2fs_is_atomic_file(inode) || f2fs_compressed_file(inode) ||
+			range.start >= inode->i_size) {
+		ret = -EINVAL;
+		goto err;
+	}
+
+	if (range.len == 0)
+		goto err;
+
+	if (inode->i_size - range.start > range.len) {
+		end_addr = range.start + range.len;
+	} else {
+		end_addr = range.len == (u64)-1 ?
+			sbi->sb->s_maxbytes : inode->i_size;
+		to_end = true;
+	}
+
+	if (!IS_ALIGNED(range.start, F2FS_BLKSIZE) ||
+			(!to_end && !IS_ALIGNED(end_addr, F2FS_BLKSIZE))) {
+		ret = -EINVAL;
+		goto err;
+	}
+
+	index = F2FS_BYTES_TO_BLK(range.start);
+	pg_end = DIV_ROUND_UP(end_addr, F2FS_BLKSIZE);
+
+	ret = f2fs_convert_inline_inode(inode);
+	if (ret)
+		goto err;
+
+	down_write(&F2FS_I(inode)->i_gc_rwsem[WRITE]);
+	down_write(&F2FS_I(inode)->i_mmap_sem);
+
+	ret = filemap_write_and_wait_range(mapping, range.start,
+			to_end ? LLONG_MAX : end_addr - 1);
+	if (ret)
+		goto out;
+
+	truncate_inode_pages_range(mapping, range.start,
+			to_end ? -1 : end_addr - 1);
+
+	while (index < pg_end) {
+		struct dnode_of_data dn;
+		pgoff_t end_offset, count;
+		int i;
+
+		set_new_dnode(&dn, inode, NULL, NULL, 0);
+		ret = f2fs_get_dnode_of_data(&dn, index, LOOKUP_NODE);
+		if (ret) {
+			if (ret == -ENOENT) {
+				index = f2fs_get_next_page_offset(&dn, index);
+				continue;
+			}
+			goto out;
+		}
+
+		end_offset = ADDRS_PER_PAGE(dn.node_page, inode);
+		count = min(end_offset - dn.ofs_in_node, pg_end - index);
+		for (i = 0; i < count; i++, index++, dn.ofs_in_node++) {
+			struct block_device *cur_bdev;
+			block_t blkaddr = f2fs_data_blkaddr(&dn);
+
+			if (!__is_valid_data_blkaddr(blkaddr))
+				continue;
+
+			if (!f2fs_is_valid_blkaddr(sbi, blkaddr,
+						DATA_GENERIC_ENHANCE)) {
+				ret = -EFSCORRUPTED;
+				f2fs_put_dnode(&dn);
+				goto out;
+			}
+
+			cur_bdev = f2fs_target_device(sbi, blkaddr, NULL);
+			if (f2fs_is_multi_device(sbi)) {
+				int di = f2fs_target_device_index(sbi, blkaddr);
+
+				blkaddr -= FDEV(di).start_blk;
+			}
+
+			if (len) {
+				if (prev_bdev == cur_bdev &&
+						index == prev_index + len &&
+						blkaddr == prev_block + len) {
+					len++;
+				} else {
+					ret = f2fs_secure_erase(prev_bdev,
+						inode, prev_index, prev_block,
+						len, range.flags);
+					if (ret) {
+						f2fs_put_dnode(&dn);
+						goto out;
+					}
+
+					len = 0;
+				}
+			}
+
+			if (!len) {
+				prev_bdev = cur_bdev;
+				prev_index = index;
+				prev_block = blkaddr;
+				len = 1;
+			}
+		}
+
+		f2fs_put_dnode(&dn);
+
+		if (fatal_signal_pending(current)) {
+			ret = -EINTR;
+			goto out;
+		}
+		cond_resched();
+	}
+
+	if (len)
+		ret = f2fs_secure_erase(prev_bdev, inode, prev_index,
+				prev_block, len, range.flags);
+out:
+	up_write(&F2FS_I(inode)->i_mmap_sem);
+	up_write(&F2FS_I(inode)->i_gc_rwsem[WRITE]);
+err:
+	inode_unlock(inode);
+	file_end_write(filp);
+
+	return ret;
+}
+
+static long __f2fs_ioctl(struct file *filp, unsigned int cmd, unsigned long arg)
+{
+	switch (cmd) {
+	case FS_IOC_GETFLAGS:
+		return f2fs_ioc_getflags(filp, arg);
+	case FS_IOC_SETFLAGS:
+		return f2fs_ioc_setflags(filp, arg);
+	case FS_IOC_GETVERSION:
+		return f2fs_ioc_getversion(filp, arg);
+	case F2FS_IOC_START_ATOMIC_WRITE:
+		return f2fs_ioc_start_atomic_write(filp);
+	case F2FS_IOC_COMMIT_ATOMIC_WRITE:
+		return f2fs_ioc_commit_atomic_write(filp);
+	case F2FS_IOC_START_VOLATILE_WRITE:
+		return f2fs_ioc_start_volatile_write(filp);
+	case F2FS_IOC_RELEASE_VOLATILE_WRITE:
+		return f2fs_ioc_release_volatile_write(filp);
+	case F2FS_IOC_ABORT_VOLATILE_WRITE:
+		return f2fs_ioc_abort_volatile_write(filp);
+	case F2FS_IOC_SHUTDOWN:
+		return f2fs_ioc_shutdown(filp, arg);
+	case FITRIM:
+		return f2fs_ioc_fitrim(filp, arg);
+	case FS_IOC_SET_ENCRYPTION_POLICY:
+		return f2fs_ioc_set_encryption_policy(filp, arg);
+	case FS_IOC_GET_ENCRYPTION_POLICY:
+		return f2fs_ioc_get_encryption_policy(filp, arg);
+	case FS_IOC_GET_ENCRYPTION_PWSALT:
+		return f2fs_ioc_get_encryption_pwsalt(filp, arg);
+	case FS_IOC_GET_ENCRYPTION_POLICY_EX:
+		return f2fs_ioc_get_encryption_policy_ex(filp, arg);
+	case FS_IOC_ADD_ENCRYPTION_KEY:
+		return f2fs_ioc_add_encryption_key(filp, arg);
+	case FS_IOC_REMOVE_ENCRYPTION_KEY:
+		return f2fs_ioc_remove_encryption_key(filp, arg);
+	case FS_IOC_REMOVE_ENCRYPTION_KEY_ALL_USERS:
+		return f2fs_ioc_remove_encryption_key_all_users(filp, arg);
+	case FS_IOC_GET_ENCRYPTION_KEY_STATUS:
+		return f2fs_ioc_get_encryption_key_status(filp, arg);
+	case FS_IOC_GET_ENCRYPTION_NONCE:
+		return f2fs_ioc_get_encryption_nonce(filp, arg);
+	case F2FS_IOC_GARBAGE_COLLECT:
+		return f2fs_ioc_gc(filp, arg);
+	case F2FS_IOC_GARBAGE_COLLECT_RANGE:
+		return f2fs_ioc_gc_range(filp, arg);
+	case F2FS_IOC_WRITE_CHECKPOINT:
+		return f2fs_ioc_write_checkpoint(filp, arg);
+	case F2FS_IOC_DEFRAGMENT:
+		return f2fs_ioc_defragment(filp, arg);
+	case F2FS_IOC_MOVE_RANGE:
+		return f2fs_ioc_move_range(filp, arg);
+	case F2FS_IOC_FLUSH_DEVICE:
+		return f2fs_ioc_flush_device(filp, arg);
+	case F2FS_IOC_GET_FEATURES:
+		return f2fs_ioc_get_features(filp, arg);
+	case FS_IOC_FSGETXATTR:
+		return f2fs_ioc_fsgetxattr(filp, arg);
+	case FS_IOC_FSSETXATTR:
+		return f2fs_ioc_fssetxattr(filp, arg);
+	case F2FS_IOC_GET_PIN_FILE:
+		return f2fs_ioc_get_pin_file(filp, arg);
+	case F2FS_IOC_SET_PIN_FILE:
+		return f2fs_ioc_set_pin_file(filp, arg);
+	case F2FS_IOC_PRECACHE_EXTENTS:
+		return f2fs_ioc_precache_extents(filp, arg);
+	case F2FS_IOC_RESIZE_FS:
+		return f2fs_ioc_resize_fs(filp, arg);
+	case FS_IOC_ENABLE_VERITY:
+		return f2fs_ioc_enable_verity(filp, arg);
+	case FS_IOC_MEASURE_VERITY:
+		return f2fs_ioc_measure_verity(filp, arg);
+	case FS_IOC_GETFSLABEL:
+		return f2fs_ioc_getfslabel(filp, arg);
+	case FS_IOC_SETFSLABEL:
+		return f2fs_ioc_setfslabel(filp, arg);
+	case F2FS_IOC_GET_COMPRESS_BLOCKS:
+		return f2fs_get_compress_blocks(filp, arg);
+	case F2FS_IOC_RELEASE_COMPRESS_BLOCKS:
+		return f2fs_release_compress_blocks(filp, arg);
+	case F2FS_IOC_RESERVE_COMPRESS_BLOCKS:
+		return f2fs_reserve_compress_blocks(filp, arg);
+	case F2FS_IOC_SEC_TRIM_FILE:
+		return f2fs_sec_trim_file(filp, arg);
+	default:
+		return -ENOTTY;
+	}
+}
+
+long f2fs_ioctl(struct file *filp, unsigned int cmd, unsigned long arg)
+{
+	if (unlikely(f2fs_cp_error(F2FS_I_SB(file_inode(filp)))))
+		return -EIO;
+	if (!f2fs_is_checkpoint_ready(F2FS_I_SB(file_inode(filp))))
+		return -ENOSPC;
+
+	return __f2fs_ioctl(filp, cmd, arg);
+}
+
+static ssize_t f2fs_file_read_iter(struct kiocb *iocb, struct iov_iter *iter)
+{
+	struct file *file = iocb->ki_filp;
+	struct inode *inode = file_inode(file);
+	int ret;
+
+	if (!f2fs_is_compress_backend_ready(inode))
+		return -EOPNOTSUPP;
+
+	ret = generic_file_read_iter(iocb, iter);
+
+	if (ret > 0)
+		f2fs_update_iostat(F2FS_I_SB(inode), APP_READ_IO, ret);
+
+	return ret;
+}
+
+static ssize_t f2fs_file_write_iter(struct kiocb *iocb, struct iov_iter *from)
+{
+	struct file *file = iocb->ki_filp;
+	struct inode *inode = file_inode(file);
+	ssize_t ret;
+
+	if (unlikely(f2fs_cp_error(F2FS_I_SB(inode)))) {
+		ret = -EIO;
+		goto out;
+	}
+
+	if (!f2fs_is_compress_backend_ready(inode)) {
+		ret = -EOPNOTSUPP;
+		goto out;
+	}
+
+	if (iocb->ki_flags & IOCB_NOWAIT) {
+		if (!inode_trylock(inode)) {
+			ret = -EAGAIN;
+			goto out;
+		}
+	} else {
+		inode_lock(inode);
+	}
+
+	if (unlikely(IS_IMMUTABLE(inode))) {
+		ret = -EPERM;
+		goto unlock;
+	}
+
+	ret = generic_write_checks(iocb, from);
+	if (ret > 0) {
+		bool preallocated = false;
+		size_t target_size = 0;
+		int err;
+
+		if (iov_iter_fault_in_readable(from, iov_iter_count(from)))
+			set_inode_flag(inode, FI_NO_PREALLOC);
+
+		if ((iocb->ki_flags & IOCB_NOWAIT)) {
+			if (!f2fs_overwrite_io(inode, iocb->ki_pos,
+						iov_iter_count(from)) ||
+				f2fs_has_inline_data(inode) ||
+				f2fs_force_buffered_io(inode, iocb, from)) {
+				clear_inode_flag(inode, FI_NO_PREALLOC);
+				inode_unlock(inode);
+				ret = -EAGAIN;
+				goto out;
+			}
+			goto write;
+		}
+
+		if (is_inode_flag_set(inode, FI_NO_PREALLOC))
+			goto write;
+
+		if (iocb->ki_flags & IOCB_DIRECT) {
+			/*
+			 * Convert inline data for Direct I/O before entering
+			 * f2fs_direct_IO().
+			 */
+			err = f2fs_convert_inline_inode(inode);
+			if (err)
+				goto out_err;
+			/*
+			 * If force_buffere_io() is true, we have to allocate
+			 * blocks all the time, since f2fs_direct_IO will fall
+			 * back to buffered IO.
+			 */
+			if (!f2fs_force_buffered_io(inode, iocb, from) &&
+					allow_outplace_dio(inode, iocb, from))
+				goto write;
+		}
+		preallocated = true;
+		target_size = iocb->ki_pos + iov_iter_count(from);
+
+		err = f2fs_preallocate_blocks(iocb, from);
+		if (err) {
+out_err:
+			clear_inode_flag(inode, FI_NO_PREALLOC);
+			inode_unlock(inode);
+			ret = err;
+			goto out;
+		}
+write:
+		ret = __generic_file_write_iter(iocb, from);
+		clear_inode_flag(inode, FI_NO_PREALLOC);
+
+		/* if we couldn't write data, we should deallocate blocks. */
+		if (preallocated && i_size_read(inode) < target_size)
+			f2fs_truncate(inode);
+
+		if (ret > 0)
+			f2fs_update_iostat(F2FS_I_SB(inode), APP_WRITE_IO, ret);
+	}
+unlock:
+	inode_unlock(inode);
+out:
+	trace_f2fs_file_write_iter(inode, iocb->ki_pos,
+					iov_iter_count(from), ret);
+	if (ret > 0)
+		ret = generic_write_sync(iocb, ret);
+	return ret;
+}
+
+#ifdef CONFIG_COMPAT
+struct compat_f2fs_gc_range {
+	u32 sync;
+	compat_u64 start;
+	compat_u64 len;
+};
+#define F2FS_IOC32_GARBAGE_COLLECT_RANGE	_IOW(F2FS_IOCTL_MAGIC, 11,\
+						struct compat_f2fs_gc_range)
+
+static int f2fs_compat_ioc_gc_range(struct file *file, unsigned long arg)
+{
+	struct compat_f2fs_gc_range __user *urange;
+	struct f2fs_gc_range range;
+	int err;
+
+	urange = compat_ptr(arg);
+	err = get_user(range.sync, &urange->sync);
+	err |= get_user(range.start, &urange->start);
+	err |= get_user(range.len, &urange->len);
+	if (err)
+		return -EFAULT;
+
+	return __f2fs_ioc_gc_range(file, &range);
+}
+
+struct compat_f2fs_move_range {
+	u32 dst_fd;
+	compat_u64 pos_in;
+	compat_u64 pos_out;
+	compat_u64 len;
+};
+#define F2FS_IOC32_MOVE_RANGE		_IOWR(F2FS_IOCTL_MAGIC, 9,	\
+					struct compat_f2fs_move_range)
+
+static int f2fs_compat_ioc_move_range(struct file *file, unsigned long arg)
+{
+	struct compat_f2fs_move_range __user *urange;
+	struct f2fs_move_range range;
+	int err;
+
+	urange = compat_ptr(arg);
+	err = get_user(range.dst_fd, &urange->dst_fd);
+	err |= get_user(range.pos_in, &urange->pos_in);
+	err |= get_user(range.pos_out, &urange->pos_out);
+	err |= get_user(range.len, &urange->len);
+	if (err)
+		return -EFAULT;
+
+	return __f2fs_ioc_move_range(file, &range);
+}
+
+long f2fs_compat_ioctl(struct file *file, unsigned int cmd, unsigned long arg)
+{
+	if (unlikely(f2fs_cp_error(F2FS_I_SB(file_inode(file)))))
+		return -EIO;
+	if (!f2fs_is_checkpoint_ready(F2FS_I_SB(file_inode(file))))
+		return -ENOSPC;
+
+	switch (cmd) {
+	case FS_IOC32_GETFLAGS:
+		cmd = FS_IOC_GETFLAGS;
+		break;
+	case FS_IOC32_SETFLAGS:
+		cmd = FS_IOC_SETFLAGS;
+		break;
+	case FS_IOC32_GETVERSION:
+		cmd = FS_IOC_GETVERSION;
+		break;
+	case F2FS_IOC32_GARBAGE_COLLECT_RANGE:
+		return f2fs_compat_ioc_gc_range(file, arg);
+	case F2FS_IOC32_MOVE_RANGE:
+		return f2fs_compat_ioc_move_range(file, arg);
+	case F2FS_IOC_START_ATOMIC_WRITE:
+	case F2FS_IOC_COMMIT_ATOMIC_WRITE:
+	case F2FS_IOC_START_VOLATILE_WRITE:
+	case F2FS_IOC_RELEASE_VOLATILE_WRITE:
+	case F2FS_IOC_ABORT_VOLATILE_WRITE:
+	case F2FS_IOC_SHUTDOWN:
+	case FITRIM:
+	case FS_IOC_SET_ENCRYPTION_POLICY:
+	case FS_IOC_GET_ENCRYPTION_PWSALT:
+	case FS_IOC_GET_ENCRYPTION_POLICY:
+	case FS_IOC_GET_ENCRYPTION_POLICY_EX:
+	case FS_IOC_ADD_ENCRYPTION_KEY:
+	case FS_IOC_REMOVE_ENCRYPTION_KEY:
+	case FS_IOC_REMOVE_ENCRYPTION_KEY_ALL_USERS:
+	case FS_IOC_GET_ENCRYPTION_KEY_STATUS:
+	case FS_IOC_GET_ENCRYPTION_NONCE:
+	case F2FS_IOC_GARBAGE_COLLECT:
+	case F2FS_IOC_WRITE_CHECKPOINT:
+	case F2FS_IOC_DEFRAGMENT:
+	case F2FS_IOC_FLUSH_DEVICE:
+	case F2FS_IOC_GET_FEATURES:
+	case FS_IOC_FSGETXATTR:
+	case FS_IOC_FSSETXATTR:
+	case F2FS_IOC_GET_PIN_FILE:
+	case F2FS_IOC_SET_PIN_FILE:
+	case F2FS_IOC_PRECACHE_EXTENTS:
+	case F2FS_IOC_RESIZE_FS:
+	case FS_IOC_ENABLE_VERITY:
+	case FS_IOC_MEASURE_VERITY:
+	case FS_IOC_GETFSLABEL:
+	case FS_IOC_SETFSLABEL:
+	case F2FS_IOC_GET_COMPRESS_BLOCKS:
+	case F2FS_IOC_RELEASE_COMPRESS_BLOCKS:
+	case F2FS_IOC_RESERVE_COMPRESS_BLOCKS:
+	case F2FS_IOC_SEC_TRIM_FILE:
+		break;
+	default:
+		return -ENOIOCTLCMD;
+	}
+	return __f2fs_ioctl(file, cmd, (unsigned long) compat_ptr(arg));
+}
+#endif
+
+const struct file_operations f2fs_file_operations = {
+	.llseek		= f2fs_llseek,
+	.read_iter	= f2fs_file_read_iter,
+	.write_iter	= f2fs_file_write_iter,
+	.open		= f2fs_file_open,
+	.release	= f2fs_release_file,
+	.mmap		= f2fs_file_mmap,
+	.flush		= f2fs_file_flush,
+	.fsync		= f2fs_sync_file,
+	.fallocate	= f2fs_fallocate,
+	.unlocked_ioctl	= f2fs_ioctl,
+#ifdef CONFIG_COMPAT
+	.compat_ioctl	= f2fs_compat_ioctl,
+#endif
+	.splice_read	= generic_file_splice_read,
+	.splice_write	= iter_file_splice_write,
+};