[mirror_ubuntu-artful-kernel.git] / fs / f2fs / file.c

/*
 * fs/f2fs/file.c
 *
 * Copyright (c) 2012 Samsung Electronics Co., Ltd.
 *             http://www.samsung.com/
 *
 * This program is free software; you can redistribute it and/or modify
 * it under the terms of the GNU General Public License version 2 as
 * published by the Free Software Foundation.
 */
#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 "f2fs.h"
#include "node.h"
#include "segment.h"
#include "xattr.h"
#include "acl.h"
#include <trace/events/f2fs.h>

static int f2fs_vm_page_mkwrite(struct vm_area_struct *vma,
						struct vm_fault *vmf)
{
	struct page *page = vmf->page;
	struct inode *inode = file_inode(vma->vm_file);
	struct f2fs_sb_info *sbi = F2FS_SB(inode->i_sb);
	struct dnode_of_data dn;
	int err;

	f2fs_balance_fs(sbi);

	sb_start_pagefault(inode->i_sb);

	/* block allocation */
	f2fs_lock_op(sbi);
	set_new_dnode(&dn, inode, NULL, NULL, 0);
	err = f2fs_reserve_block(&dn, page->index);
	f2fs_unlock_op(sbi);
	if (err)
		goto out;

	file_update_time(vma->vm_file);
	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;
	}

	/*
	 * check to see if the page is mapped already (no holes)
	 */
	if (PageMappedToDisk(page))
		goto mapped;

	/* page is wholly or partially inside EOF */
	if (((page->index + 1) << PAGE_CACHE_SHIFT) > i_size_read(inode)) {
		unsigned offset;
		offset = i_size_read(inode) & ~PAGE_CACHE_MASK;
		zero_user_segment(page, offset, PAGE_CACHE_SIZE);
	}
	set_page_dirty(page);
	SetPageUptodate(page);

	trace_f2fs_vm_page_mkwrite(page, DATA);
mapped:
	/* fill the page */
	wait_on_page_writeback(page);
out:
	sb_end_pagefault(inode->i_sb);
	return block_page_mkwrite_return(err);
}

static const struct vm_operations_struct f2fs_file_vm_ops = {
	.fault		= filemap_fault,
	.page_mkwrite	= f2fs_vm_page_mkwrite,
	.remap_pages	= generic_file_remap_pages,
};

static int get_parent_ino(struct inode *inode, nid_t *pino)
{
	struct dentry *dentry;

	inode = igrab(inode);
	dentry = d_find_any_alias(inode);
	iput(inode);
	if (!dentry)
		return 0;

	if (update_dent_inode(inode, &dentry->d_name)) {
		dput(dentry);
		return 0;
	}

	*pino = parent_ino(dentry);
	dput(dentry);
	return 1;
}

int f2fs_sync_file(struct file *file, loff_t start, loff_t end, int datasync)
{
	struct inode *inode = file->f_mapping->host;
	struct f2fs_sb_info *sbi = F2FS_SB(inode->i_sb);
	int ret = 0;
	bool need_cp = false;
	struct writeback_control wbc = {
		.sync_mode = WB_SYNC_NONE,
		.nr_to_write = LONG_MAX,
		.for_reclaim = 0,
	};

	if (unlikely(f2fs_readonly(inode->i_sb)))
		return 0;

	trace_f2fs_sync_file_enter(inode);
	ret = filemap_write_and_wait_range(inode->i_mapping, start, end);
	if (ret) {
		trace_f2fs_sync_file_exit(inode, need_cp, datasync, ret);
		return ret;
	}

	/* guarantee free sections for fsync */
	f2fs_balance_fs(sbi);

	mutex_lock(&inode->i_mutex);

	/*
	 * Both of fdatasync() and fsync() are able to be recovered from
	 * sudden-power-off.
	 */
	if (!S_ISREG(inode->i_mode) || inode->i_nlink != 1)
		need_cp = true;
	else if (file_wrong_pino(inode))
		need_cp = true;
	else if (!space_for_roll_forward(sbi))
		need_cp = true;
	else if (!is_checkpointed_node(sbi, F2FS_I(inode)->i_pino))
		need_cp = true;
	else if (F2FS_I(inode)->xattr_ver == cur_cp_version(F2FS_CKPT(sbi)))
		need_cp = true;

	if (need_cp) {
		nid_t pino;

		F2FS_I(inode)->xattr_ver = 0;

		/* all the dirty node pages should be flushed for POR */
		ret = f2fs_sync_fs(inode->i_sb, 1);
		if (file_wrong_pino(inode) && inode->i_nlink == 1 &&
					get_parent_ino(inode, &pino)) {
			F2FS_I(inode)->i_pino = pino;
			file_got_pino(inode);
			mark_inode_dirty_sync(inode);
			ret = f2fs_write_inode(inode, NULL);
			if (ret)
				goto out;
		}
	} else {
		/* if there is no written node page, write its inode page */
		while (!sync_node_pages(sbi, inode->i_ino, &wbc)) {
			mark_inode_dirty_sync(inode);
			ret = f2fs_write_inode(inode, NULL);
			if (ret)
				goto out;
		}
		ret = wait_on_node_pages_writeback(sbi, inode->i_ino);
		if (ret)
			goto out;
		ret = blkdev_issue_flush(inode->i_sb->s_bdev, GFP_KERNEL, NULL);
	}
out:
	mutex_unlock(&inode->i_mutex);
	trace_f2fs_sync_file_exit(inode, need_cp, datasync, ret);
	return ret;
}

static int f2fs_file_mmap(struct file *file, struct vm_area_struct *vma)
{
	file_accessed(file);
	vma->vm_ops = &f2fs_file_vm_ops;
	return 0;
}

int truncate_data_blocks_range(struct dnode_of_data *dn, int count)
{
	int nr_free = 0, ofs = dn->ofs_in_node;
	struct f2fs_sb_info *sbi = F2FS_SB(dn->inode->i_sb);
	struct f2fs_node *raw_node;
	__le32 *addr;

	raw_node = F2FS_NODE(dn->node_page);
	addr = blkaddr_in_node(raw_node) + ofs;

	for (; count > 0; count--, addr++, dn->ofs_in_node++) {
		block_t blkaddr = le32_to_cpu(*addr);
		if (blkaddr == NULL_ADDR)
			continue;

		update_extent_cache(NULL_ADDR, dn);
		invalidate_blocks(sbi, blkaddr);
		nr_free++;
	}
	if (nr_free) {
		dec_valid_block_count(sbi, dn->inode, nr_free);
		set_page_dirty(dn->node_page);
		sync_inode_page(dn);
	}
	dn->ofs_in_node = ofs;

	trace_f2fs_truncate_data_blocks_range(dn->inode, dn->nid,
					 dn->ofs_in_node, nr_free);
	return nr_free;
}

void truncate_data_blocks(struct dnode_of_data *dn)
{
	truncate_data_blocks_range(dn, ADDRS_PER_BLOCK);
}

static void truncate_partial_data_page(struct inode *inode, u64 from)
{
	unsigned offset = from & (PAGE_CACHE_SIZE - 1);
	struct page *page;

	if (!offset)
		return;

	page = find_data_page(inode, from >> PAGE_CACHE_SHIFT, false);
	if (IS_ERR(page))
		return;

	lock_page(page);
	if (unlikely(page->mapping != inode->i_mapping)) {
		f2fs_put_page(page, 1);
		return;
	}
	wait_on_page_writeback(page);
	zero_user(page, offset, PAGE_CACHE_SIZE - offset);
	set_page_dirty(page);
	f2fs_put_page(page, 1);
}

int truncate_blocks(struct inode *inode, u64 from)
{
	struct f2fs_sb_info *sbi = F2FS_SB(inode->i_sb);
	unsigned int blocksize = inode->i_sb->s_blocksize;
	struct dnode_of_data dn;
	pgoff_t free_from;
	int count = 0, err = 0;

	trace_f2fs_truncate_blocks_enter(inode, from);

	if (f2fs_has_inline_data(inode))
		goto done;

	free_from = (pgoff_t)
			((from + blocksize - 1) >> (sbi->log_blocksize));

	f2fs_lock_op(sbi);

	set_new_dnode(&dn, inode, NULL, NULL, 0);
	err = get_dnode_of_data(&dn, free_from, LOOKUP_NODE);
	if (err) {
		if (err == -ENOENT)
			goto free_next;
		f2fs_unlock_op(sbi);
		trace_f2fs_truncate_blocks_exit(inode, err);
		return err;
	}

	if (IS_INODE(dn.node_page))
		count = ADDRS_PER_INODE(F2FS_I(inode));
	else
		count = ADDRS_PER_BLOCK;

	count -= dn.ofs_in_node;
	f2fs_bug_on(count < 0);

	if (dn.ofs_in_node || IS_INODE(dn.node_page)) {
		truncate_data_blocks_range(&dn, count);
		free_from += count;
	}

	f2fs_put_dnode(&dn);
free_next:
	err = truncate_inode_blocks(inode, free_from);
	f2fs_unlock_op(sbi);
done:
	/* lastly zero out the first data page */
	truncate_partial_data_page(inode, from);

	trace_f2fs_truncate_blocks_exit(inode, err);
	return err;
}

void f2fs_truncate(struct inode *inode)
{
	if (!(S_ISREG(inode->i_mode) || S_ISDIR(inode->i_mode) ||
				S_ISLNK(inode->i_mode)))
		return;

	trace_f2fs_truncate(inode);

	if (!truncate_blocks(inode, i_size_read(inode))) {
		inode->i_mtime = inode->i_ctime = CURRENT_TIME;
		mark_inode_dirty(inode);
	}
}

int f2fs_getattr(struct vfsmount *mnt,
			 struct dentry *dentry, struct kstat *stat)
{
	struct inode *inode = dentry->d_inode;
	generic_fillattr(inode, stat);
	stat->blocks <<= 3;
	return 0;
}

#ifdef CONFIG_F2FS_FS_POSIX_ACL
static void __setattr_copy(struct inode *inode, const struct iattr *attr)
{
	struct f2fs_inode_info *fi = F2FS_I(inode);
	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 = timespec_trunc(attr->ia_atime,
						inode->i_sb->s_time_gran);
	if (ia_valid & ATTR_MTIME)
		inode->i_mtime = timespec_trunc(attr->ia_mtime,
						inode->i_sb->s_time_gran);
	if (ia_valid & ATTR_CTIME)
		inode->i_ctime = timespec_trunc(attr->ia_ctime,
						inode->i_sb->s_time_gran);
	if (ia_valid & ATTR_MODE) {
		umode_t mode = attr->ia_mode;

		if (!in_group_p(inode->i_gid) && !capable(CAP_FSETID))
			mode &= ~S_ISGID;
		set_acl_inode(fi, mode);
	}
}
#else
#define __setattr_copy setattr_copy
#endif

int f2fs_setattr(struct dentry *dentry, struct iattr *attr)
{
	struct inode *inode = dentry->d_inode;
	struct f2fs_inode_info *fi = F2FS_I(inode);
	int err;

	err = inode_change_ok(inode, attr);
	if (err)
		return err;

	if ((attr->ia_valid & ATTR_SIZE) &&
			attr->ia_size != i_size_read(inode)) {
		err = f2fs_convert_inline_data(inode, attr->ia_size);
		if (err)
			return err;

		truncate_setsize(inode, attr->ia_size);
		f2fs_truncate(inode);
		f2fs_balance_fs(F2FS_SB(inode->i_sb));
	}

	__setattr_copy(inode, attr);

	if (attr->ia_valid & ATTR_MODE) {
		err = f2fs_acl_chmod(inode);
		if (err || is_inode_flag_set(fi, FI_ACL_MODE)) {
			inode->i_mode = fi->i_acl_mode;
			clear_inode_flag(fi, FI_ACL_MODE);
		}
	}

	mark_inode_dirty(inode);
	return err;
}

const struct inode_operations f2fs_file_inode_operations = {
	.getattr	= f2fs_getattr,
	.setattr	= f2fs_setattr,
	.get_acl	= f2fs_get_acl,
#ifdef CONFIG_F2FS_FS_XATTR
	.setxattr	= generic_setxattr,
	.getxattr	= generic_getxattr,
	.listxattr	= f2fs_listxattr,
	.removexattr	= generic_removexattr,
#endif
};

static void fill_zero(struct inode *inode, pgoff_t index,
					loff_t start, loff_t len)
{
	struct f2fs_sb_info *sbi = F2FS_SB(inode->i_sb);
	struct page *page;

	if (!len)
		return;

	f2fs_balance_fs(sbi);

	f2fs_lock_op(sbi);
	page = get_new_data_page(inode, NULL, index, false);
	f2fs_unlock_op(sbi);

	if (!IS_ERR(page)) {
		wait_on_page_writeback(page);
		zero_user(page, start, len);
		set_page_dirty(page);
		f2fs_put_page(page, 1);
	}
}

int truncate_hole(struct inode *inode, pgoff_t pg_start, pgoff_t pg_end)
{
	pgoff_t index;
	int err;

	for (index = pg_start; index < pg_end; index++) {
		struct dnode_of_data dn;

		set_new_dnode(&dn, inode, NULL, NULL, 0);
		err = get_dnode_of_data(&dn, index, LOOKUP_NODE);
		if (err) {
			if (err == -ENOENT)
				continue;
			return err;
		}

		if (dn.data_blkaddr != NULL_ADDR)
			truncate_data_blocks_range(&dn, 1);
		f2fs_put_dnode(&dn);
	}
	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 = 0;

	ret = f2fs_convert_inline_data(inode, MAX_INLINE_DATA + 1);
	if (ret)
		return ret;

	pg_start = ((unsigned long long) offset) >> PAGE_CACHE_SHIFT;
	pg_end = ((unsigned long long) offset + len) >> PAGE_CACHE_SHIFT;

	off_start = offset & (PAGE_CACHE_SIZE - 1);
	off_end = (offset + len) & (PAGE_CACHE_SIZE - 1);

	if (pg_start == pg_end) {
		fill_zero(inode, pg_start, off_start,
						off_end - off_start);
	} else {
		if (off_start)
			fill_zero(inode, pg_start++, off_start,
					PAGE_CACHE_SIZE - off_start);
		if (off_end)
			fill_zero(inode, pg_end, 0, off_end);

		if (pg_start < pg_end) {
			struct address_space *mapping = inode->i_mapping;
			loff_t blk_start, blk_end;
			struct f2fs_sb_info *sbi = F2FS_SB(inode->i_sb);

			f2fs_balance_fs(sbi);

			blk_start = pg_start << PAGE_CACHE_SHIFT;
			blk_end = pg_end << PAGE_CACHE_SHIFT;
			truncate_inode_pages_range(mapping, blk_start,
					blk_end - 1);

			f2fs_lock_op(sbi);
			ret = truncate_hole(inode, pg_start, pg_end);
			f2fs_unlock_op(sbi);
		}
	}

	return ret;
}

static int expand_inode_data(struct inode *inode, loff_t offset,
					loff_t len, int mode)
{
	struct f2fs_sb_info *sbi = F2FS_SB(inode->i_sb);
	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_data(inode, offset + len);
	if (ret)
		return ret;

	pg_start = ((unsigned long long) offset) >> PAGE_CACHE_SHIFT;
	pg_end = ((unsigned long long) offset + len) >> PAGE_CACHE_SHIFT;

	off_start = offset & (PAGE_CACHE_SIZE - 1);
	off_end = (offset + len) & (PAGE_CACHE_SIZE - 1);

	for (index = pg_start; index <= pg_end; index++) {
		struct dnode_of_data dn;

		f2fs_lock_op(sbi);
		set_new_dnode(&dn, inode, NULL, NULL, 0);
		ret = f2fs_reserve_block(&dn, index);
		f2fs_unlock_op(sbi);
		if (ret)
			break;

		if (pg_start == pg_end)
			new_size = offset + len;
		else if (index == pg_start && off_start)
			new_size = (index + 1) << PAGE_CACHE_SHIFT;
		else if (index == pg_end)
			new_size = (index << PAGE_CACHE_SHIFT) + off_end;
		else
			new_size += PAGE_CACHE_SIZE;
	}

	if (!(mode & FALLOC_FL_KEEP_SIZE) &&
		i_size_read(inode) < new_size) {
		i_size_write(inode, new_size);
		mark_inode_dirty(inode);
	}

	return ret;
}

static long f2fs_fallocate(struct file *file, int mode,
				loff_t offset, loff_t len)
{
	struct inode *inode = file_inode(file);
	long ret;

	if (mode & ~(FALLOC_FL_KEEP_SIZE | FALLOC_FL_PUNCH_HOLE))
		return -EOPNOTSUPP;

	if (mode & FALLOC_FL_PUNCH_HOLE)
		ret = punch_hole(inode, offset, len);
	else
		ret = expand_inode_data(inode, offset, len, mode);

	if (!ret) {
		inode->i_mtime = inode->i_ctime = CURRENT_TIME;
		mark_inode_dirty(inode);
	}
	trace_f2fs_fallocate(inode, mode, offset, len, ret);
	return ret;
}

#define F2FS_REG_FLMASK		(~(FS_DIRSYNC_FL | FS_TOPDIR_FL))
#define F2FS_OTHER_FLMASK	(FS_NODUMP_FL | FS_NOATIME_FL)

static inline __u32 f2fs_mask_flags(umode_t mode, __u32 flags)
{
	if (S_ISDIR(mode))
		return flags;
	else if (S_ISREG(mode))
		return flags & F2FS_REG_FLMASK;
	else
		return flags & F2FS_OTHER_FLMASK;
}

long f2fs_ioctl(struct file *filp, unsigned int cmd, unsigned long arg)
{
	struct inode *inode = file_inode(filp);
	struct f2fs_inode_info *fi = F2FS_I(inode);
	unsigned int flags;
	int ret;

	switch (cmd) {
	case F2FS_IOC_GETFLAGS:
		flags = fi->i_flags & FS_FL_USER_VISIBLE;
		return put_user(flags, (int __user *) arg);
	case F2FS_IOC_SETFLAGS:
	{
		unsigned int oldflags;

		ret = mnt_want_write_file(filp);
		if (ret)
			return ret;

		if (!inode_owner_or_capable(inode)) {
			ret = -EACCES;
			goto out;
		}

		if (get_user(flags, (int __user *) arg)) {
			ret = -EFAULT;
			goto out;
		}

		flags = f2fs_mask_flags(inode->i_mode, flags);

		mutex_lock(&inode->i_mutex);

		oldflags = fi->i_flags;

		if ((flags ^ oldflags) & (FS_APPEND_FL | FS_IMMUTABLE_FL)) {
			if (!capable(CAP_LINUX_IMMUTABLE)) {
				mutex_unlock(&inode->i_mutex);
				ret = -EPERM;
				goto out;
			}
		}

		flags = flags & FS_FL_USER_MODIFIABLE;
		flags |= oldflags & ~FS_FL_USER_MODIFIABLE;
		fi->i_flags = flags;
		mutex_unlock(&inode->i_mutex);

		f2fs_set_inode_flags(inode);
		inode->i_ctime = CURRENT_TIME;
		mark_inode_dirty(inode);
out:
		mnt_drop_write_file(filp);
		return ret;
	}
	default:
		return -ENOTTY;
	}
}

#ifdef CONFIG_COMPAT
long f2fs_compat_ioctl(struct file *file, unsigned int cmd, unsigned long arg)
{
	switch (cmd) {
	case F2FS_IOC32_GETFLAGS:
		cmd = F2FS_IOC_GETFLAGS;
		break;
	case F2FS_IOC32_SETFLAGS:
		cmd = F2FS_IOC_SETFLAGS;
		break;
	default:
		return -ENOIOCTLCMD;
	}
	return f2fs_ioctl(file, cmd, (unsigned long) compat_ptr(arg));
}
#endif

const struct file_operations f2fs_file_operations = {
	.llseek		= generic_file_llseek,
	.read		= do_sync_read,
	.write		= do_sync_write,
	.aio_read	= generic_file_aio_read,
	.aio_write	= generic_file_aio_write,
	.open		= generic_file_open,
	.mmap		= f2fs_file_mmap,
	.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	= generic_file_splice_write,
};
Commit	Line	Data
0a8165d7	1	/*
fbfa2cc5 JK	2	* fs/f2fs/file.c
	3	*
	4	* Copyright (c) 2012 Samsung Electronics Co., Ltd.
	5	* http://www.samsung.com/
	6	*
	7	* This program is free software; you can redistribute it and/or modify
	8	* it under the terms of the GNU General Public License version 2 as
	9	* published by the Free Software Foundation.
	10	*/
	11	#include <linux/fs.h>
	12	#include <linux/f2fs_fs.h>
	13	#include <linux/stat.h>
	14	#include <linux/buffer_head.h>
	15	#include <linux/writeback.h>
ae51fb31	16	#include <linux/blkdev.h>
fbfa2cc5 JK	17	#include <linux/falloc.h>
fbfa2cc5 JK	18	#include <linux/types.h>
e9750824	19	#include <linux/compat.h>
fbfa2cc5 JK	20	#include <linux/uaccess.h>
	21	#include <linux/mount.h>
	22
	23	#include "f2fs.h"
	24	#include "node.h"
	25	#include "segment.h"
	26	#include "xattr.h"
	27	#include "acl.h"
a2a4a7e4	28	#include <trace/events/f2fs.h>
fbfa2cc5 JK	29
	30	static int f2fs_vm_page_mkwrite(struct vm_area_struct *vma,
	31	struct vm_fault *vmf)
	32	{
	33	struct page *page = vmf->page;
6131ffaa	34	struct inode *inode = file_inode(vma->vm_file);
fbfa2cc5	35	struct f2fs_sb_info *sbi = F2FS_SB(inode->i_sb);
fbfa2cc5	36	struct dnode_of_data dn;
e479556b	37	int err;
fbfa2cc5 JK	38
	39	f2fs_balance_fs(sbi);
	40
	41	sb_start_pagefault(inode->i_sb);
	42
fbfa2cc5	43	/* block allocation */
e479556b	44	f2fs_lock_op(sbi);
fbfa2cc5	45	set_new_dnode(&dn, inode, NULL, NULL, 0);
b600965c	46	err = f2fs_reserve_block(&dn, page->index);
e479556b	47	f2fs_unlock_op(sbi);
b600965c HL	48	if (err)
b600965c HL	49	goto out;
fbfa2cc5	50
9851e6e1	51	file_update_time(vma->vm_file);
fbfa2cc5	52	lock_page(page);
6bacf52f	53	if (unlikely(page->mapping != inode->i_mapping \|\|
9851e6e1	54	page_offset(page) > i_size_read(inode) \|\|
6bacf52f	55	!PageUptodate(page))) {
fbfa2cc5 JK	56	unlock_page(page);
	57	err = -EFAULT;
	58	goto out;
	59	}
	60
	61	/*
	62	* check to see if the page is mapped already (no holes)
	63	*/
	64	if (PageMappedToDisk(page))
9851e6e1	65	goto mapped;
fbfa2cc5 JK	66
	67	/* page is wholly or partially inside EOF */
	68	if (((page->index + 1) << PAGE_CACHE_SHIFT) > i_size_read(inode)) {
	69	unsigned offset;
	70	offset = i_size_read(inode) & ~PAGE_CACHE_MASK;
	71	zero_user_segment(page, offset, PAGE_CACHE_SIZE);
	72	}
	73	set_page_dirty(page);
	74	SetPageUptodate(page);
	75
e943a10d	76	trace_f2fs_vm_page_mkwrite(page, DATA);
9851e6e1 NJ	77	mapped:
	78	/* fill the page */
	79	wait_on_page_writeback(page);
fbfa2cc5 JK	80	out:
	81	sb_end_pagefault(inode->i_sb);
	82	return block_page_mkwrite_return(err);
	83	}
	84
	85	static const struct vm_operations_struct f2fs_file_vm_ops = {
692bb55d JK	86	.fault = filemap_fault,
	87	.page_mkwrite = f2fs_vm_page_mkwrite,
	88	.remap_pages = generic_file_remap_pages,
fbfa2cc5 JK	89	};
fbfa2cc5 JK	90
354a3399 JK	91	static int get_parent_ino(struct inode inode, nid_t pino)
	92	{
	93	struct dentry *dentry;
	94
	95	inode = igrab(inode);
	96	dentry = d_find_any_alias(inode);
	97	iput(inode);
	98	if (!dentry)
	99	return 0;
	100
f0947e5c JK	101	if (update_dent_inode(inode, &dentry->d_name)) {
	102	dput(dentry);
	103	return 0;
	104	}
354a3399	105
f0947e5c JK	106	*pino = parent_ino(dentry);
f0947e5c JK	107	dput(dentry);
354a3399 JK	108	return 1;
	109	}
	110
fbfa2cc5 JK	111	int f2fs_sync_file(struct file *file, loff_t start, loff_t end, int datasync)
	112	{
	113	struct inode *inode = file->f_mapping->host;
	114	struct f2fs_sb_info *sbi = F2FS_SB(inode->i_sb);
fbfa2cc5 JK	115	int ret = 0;
	116	bool need_cp = false;
	117	struct writeback_control wbc = {
fb5566da	118	.sync_mode = WB_SYNC_NONE,
fbfa2cc5 JK	119	.nr_to_write = LONG_MAX,
	120	.for_reclaim = 0,
	121	};
	122
6bacf52f	123	if (unlikely(f2fs_readonly(inode->i_sb)))
1fa95b0b NJ	124	return 0;
1fa95b0b NJ	125
a2a4a7e4	126	trace_f2fs_sync_file_enter(inode);
fbfa2cc5	127	ret = filemap_write_and_wait_range(inode->i_mapping, start, end);
a2a4a7e4 NJ	128	if (ret) {
a2a4a7e4 NJ	129	trace_f2fs_sync_file_exit(inode, need_cp, datasync, ret);
fbfa2cc5	130	return ret;
a2a4a7e4	131	}
fbfa2cc5	132
7d82db83 JK	133	/* guarantee free sections for fsync */
	134	f2fs_balance_fs(sbi);
	135
fbfa2cc5 JK	136	mutex_lock(&inode->i_mutex);
fbfa2cc5 JK	137
e5d2385e JK	138	/*
	139	* Both of fdatasync() and fsync() are able to be recovered from
	140	* sudden-power-off.
	141	*/
fbfa2cc5 JK	142	if (!S_ISREG(inode->i_mode) \|\| inode->i_nlink != 1)
fbfa2cc5 JK	143	need_cp = true;
354a3399	144	else if (file_wrong_pino(inode))
fbfa2cc5	145	need_cp = true;
facb0205	146	else if (!space_for_roll_forward(sbi))
fbfa2cc5	147	need_cp = true;
953a3e27	148	else if (!is_checkpointed_node(sbi, F2FS_I(inode)->i_pino))
fbfa2cc5	149	need_cp = true;
d71b5564	150	else if (F2FS_I(inode)->xattr_ver == cur_cp_version(F2FS_CKPT(sbi)))
e518ff81	151	need_cp = true;
fbfa2cc5	152
fbfa2cc5	153	if (need_cp) {
354a3399 JK	154	nid_t pino;
354a3399 JK	155
e518ff81 JK	156	F2FS_I(inode)->xattr_ver = 0;
e518ff81 JK	157
fbfa2cc5 JK	158	/* all the dirty node pages should be flushed for POR */
fbfa2cc5 JK	159	ret = f2fs_sync_fs(inode->i_sb, 1);
354a3399 JK	160	if (file_wrong_pino(inode) && inode->i_nlink == 1 &&
	161	get_parent_ino(inode, &pino)) {
	162	F2FS_I(inode)->i_pino = pino;
	163	file_got_pino(inode);
	164	mark_inode_dirty_sync(inode);
	165	ret = f2fs_write_inode(inode, NULL);
	166	if (ret)
	167	goto out;
	168	}
fbfa2cc5	169	} else {
398b1ac5 JK	170	/* if there is no written node page, write its inode page */
398b1ac5 JK	171	while (!sync_node_pages(sbi, inode->i_ino, &wbc)) {
b3783873	172	mark_inode_dirty_sync(inode);
398b1ac5 JK	173	ret = f2fs_write_inode(inode, NULL);
	174	if (ret)
	175	goto out;
	176	}
cfe58f9d JK	177	ret = wait_on_node_pages_writeback(sbi, inode->i_ino);
	178	if (ret)
	179	goto out;
ae51fb31	180	ret = blkdev_issue_flush(inode->i_sb->s_bdev, GFP_KERNEL, NULL);
fbfa2cc5 JK	181	}
	182	out:
	183	mutex_unlock(&inode->i_mutex);
a2a4a7e4	184	trace_f2fs_sync_file_exit(inode, need_cp, datasync, ret);
fbfa2cc5 JK	185	return ret;
	186	}
	187
	188	static int f2fs_file_mmap(struct file file, struct vm_area_struct vma)
	189	{
	190	file_accessed(file);
	191	vma->vm_ops = &f2fs_file_vm_ops;
	192	return 0;
	193	}
	194
b292dcab	195	int truncate_data_blocks_range(struct dnode_of_data *dn, int count)
fbfa2cc5 JK	196	{
	197	int nr_free = 0, ofs = dn->ofs_in_node;
	198	struct f2fs_sb_info *sbi = F2FS_SB(dn->inode->i_sb);
	199	struct f2fs_node *raw_node;
	200	__le32 *addr;
	201
45590710	202	raw_node = F2FS_NODE(dn->node_page);
fbfa2cc5 JK	203	addr = blkaddr_in_node(raw_node) + ofs;
fbfa2cc5 JK	204
6c311ec6	205	for (; count > 0; count--, addr++, dn->ofs_in_node++) {
fbfa2cc5 JK	206	block_t blkaddr = le32_to_cpu(*addr);
	207	if (blkaddr == NULL_ADDR)
	208	continue;
	209
	210	update_extent_cache(NULL_ADDR, dn);
	211	invalidate_blocks(sbi, blkaddr);
fbfa2cc5 JK	212	nr_free++;
	213	}
	214	if (nr_free) {
d7cc950b	215	dec_valid_block_count(sbi, dn->inode, nr_free);
fbfa2cc5 JK	216	set_page_dirty(dn->node_page);
	217	sync_inode_page(dn);
	218	}
	219	dn->ofs_in_node = ofs;
51dd6249 NJ	220
	221	trace_f2fs_truncate_data_blocks_range(dn->inode, dn->nid,
	222	dn->ofs_in_node, nr_free);
fbfa2cc5 JK	223	return nr_free;
	224	}
	225
	226	void truncate_data_blocks(struct dnode_of_data *dn)
	227	{
	228	truncate_data_blocks_range(dn, ADDRS_PER_BLOCK);
	229	}
	230
	231	static void truncate_partial_data_page(struct inode *inode, u64 from)
	232	{
	233	unsigned offset = from & (PAGE_CACHE_SIZE - 1);
	234	struct page *page;
	235
	236	if (!offset)
	237	return;
	238
c718379b	239	page = find_data_page(inode, from >> PAGE_CACHE_SHIFT, false);
fbfa2cc5 JK	240	if (IS_ERR(page))
	241	return;
	242
	243	lock_page(page);
6bacf52f	244	if (unlikely(page->mapping != inode->i_mapping)) {
afcb7ca0 JK	245	f2fs_put_page(page, 1);
	246	return;
	247	}
fbfa2cc5 JK	248	wait_on_page_writeback(page);
	249	zero_user(page, offset, PAGE_CACHE_SIZE - offset);
	250	set_page_dirty(page);
	251	f2fs_put_page(page, 1);
	252	}
	253
1e1bb4ba	254	int truncate_blocks(struct inode *inode, u64 from)
fbfa2cc5 JK	255	{
	256	struct f2fs_sb_info *sbi = F2FS_SB(inode->i_sb);
	257	unsigned int blocksize = inode->i_sb->s_blocksize;
	258	struct dnode_of_data dn;
	259	pgoff_t free_from;
9ffe0fb5	260	int count = 0, err = 0;
fbfa2cc5	261
51dd6249 NJ	262	trace_f2fs_truncate_blocks_enter(inode, from);
51dd6249 NJ	263
f185ff97 JK	264	if (f2fs_has_inline_data(inode))
	265	goto done;
	266
fbfa2cc5 JK	267	free_from = (pgoff_t)
	268	((from + blocksize - 1) >> (sbi->log_blocksize));
	269
e479556b	270	f2fs_lock_op(sbi);
9ffe0fb5	271
fbfa2cc5	272	set_new_dnode(&dn, inode, NULL, NULL, 0);
266e97a8	273	err = get_dnode_of_data(&dn, free_from, LOOKUP_NODE);
fbfa2cc5 JK	274	if (err) {
	275	if (err == -ENOENT)
	276	goto free_next;
e479556b	277	f2fs_unlock_op(sbi);
51dd6249	278	trace_f2fs_truncate_blocks_exit(inode, err);
fbfa2cc5 JK	279	return err;
	280	}
	281
	282	if (IS_INODE(dn.node_page))
de93653f	283	count = ADDRS_PER_INODE(F2FS_I(inode));
fbfa2cc5 JK	284	else
	285	count = ADDRS_PER_BLOCK;
	286
	287	count -= dn.ofs_in_node;
5d56b671	288	f2fs_bug_on(count < 0);
39936837	289
fbfa2cc5 JK	290	if (dn.ofs_in_node \|\| IS_INODE(dn.node_page)) {
	291	truncate_data_blocks_range(&dn, count);
	292	free_from += count;
	293	}
	294
	295	f2fs_put_dnode(&dn);
	296	free_next:
	297	err = truncate_inode_blocks(inode, free_from);
e479556b	298	f2fs_unlock_op(sbi);
f185ff97	299	done:
fbfa2cc5 JK	300	/* lastly zero out the first data page */
	301	truncate_partial_data_page(inode, from);
	302
51dd6249	303	trace_f2fs_truncate_blocks_exit(inode, err);
fbfa2cc5 JK	304	return err;
	305	}
	306
	307	void f2fs_truncate(struct inode *inode)
	308	{
	309	if (!(S_ISREG(inode->i_mode) \|\| S_ISDIR(inode->i_mode) \|\|
	310	S_ISLNK(inode->i_mode)))
	311	return;
	312
51dd6249 NJ	313	trace_f2fs_truncate(inode);
51dd6249 NJ	314
fbfa2cc5 JK	315	if (!truncate_blocks(inode, i_size_read(inode))) {
	316	inode->i_mtime = inode->i_ctime = CURRENT_TIME;
	317	mark_inode_dirty(inode);
	318	}
fbfa2cc5 JK	319	}
fbfa2cc5 JK	320
2d4d9fb5	321	int f2fs_getattr(struct vfsmount *mnt,
fbfa2cc5 JK	322	struct dentry dentry, struct kstat stat)
	323	{
	324	struct inode *inode = dentry->d_inode;
	325	generic_fillattr(inode, stat);
	326	stat->blocks <<= 3;
	327	return 0;
	328	}
	329
	330	#ifdef CONFIG_F2FS_FS_POSIX_ACL
	331	static void __setattr_copy(struct inode inode, const struct iattr attr)
	332	{
	333	struct f2fs_inode_info *fi = F2FS_I(inode);
	334	unsigned int ia_valid = attr->ia_valid;
	335
	336	if (ia_valid & ATTR_UID)
	337	inode->i_uid = attr->ia_uid;
	338	if (ia_valid & ATTR_GID)
	339	inode->i_gid = attr->ia_gid;
	340	if (ia_valid & ATTR_ATIME)
	341	inode->i_atime = timespec_trunc(attr->ia_atime,
	342	inode->i_sb->s_time_gran);
	343	if (ia_valid & ATTR_MTIME)
	344	inode->i_mtime = timespec_trunc(attr->ia_mtime,
	345	inode->i_sb->s_time_gran);
	346	if (ia_valid & ATTR_CTIME)
	347	inode->i_ctime = timespec_trunc(attr->ia_ctime,
	348	inode->i_sb->s_time_gran);
	349	if (ia_valid & ATTR_MODE) {
	350	umode_t mode = attr->ia_mode;
	351
	352	if (!in_group_p(inode->i_gid) && !capable(CAP_FSETID))
	353	mode &= ~S_ISGID;
	354	set_acl_inode(fi, mode);
	355	}
	356	}
	357	#else
	358	#define __setattr_copy setattr_copy
	359	#endif
	360
	361	int f2fs_setattr(struct dentry dentry, struct iattr attr)
	362	{
	363	struct inode *inode = dentry->d_inode;
	364	struct f2fs_inode_info *fi = F2FS_I(inode);
	365	int err;
	366
	367	err = inode_change_ok(inode, attr);
	368	if (err)
	369	return err;
	370
	371	if ((attr->ia_valid & ATTR_SIZE) &&
	372	attr->ia_size != i_size_read(inode)) {
9e09fc85 JK	373	err = f2fs_convert_inline_data(inode, attr->ia_size);
	374	if (err)
	375	return err;
9ffe0fb5	376
fbfa2cc5	377	truncate_setsize(inode, attr->ia_size);
9e09fc85	378	f2fs_truncate(inode);
d4686d56	379	f2fs_balance_fs(F2FS_SB(inode->i_sb));
fbfa2cc5 JK	380	}
	381
	382	__setattr_copy(inode, attr);
	383
	384	if (attr->ia_valid & ATTR_MODE) {
	385	err = f2fs_acl_chmod(inode);
	386	if (err \|\| is_inode_flag_set(fi, FI_ACL_MODE)) {
	387	inode->i_mode = fi->i_acl_mode;
	388	clear_inode_flag(fi, FI_ACL_MODE);
	389	}
	390	}
	391
	392	mark_inode_dirty(inode);
	393	return err;
	394	}
	395
	396	const struct inode_operations f2fs_file_inode_operations = {
	397	.getattr = f2fs_getattr,
	398	.setattr = f2fs_setattr,
	399	.get_acl = f2fs_get_acl,
	400	#ifdef CONFIG_F2FS_FS_XATTR
	401	.setxattr = generic_setxattr,
	402	.getxattr = generic_getxattr,
	403	.listxattr = f2fs_listxattr,
	404	.removexattr = generic_removexattr,
	405	#endif
	406	};
	407
	408	static void fill_zero(struct inode *inode, pgoff_t index,
	409	loff_t start, loff_t len)
	410	{
bd43df02	411	struct f2fs_sb_info *sbi = F2FS_SB(inode->i_sb);
fbfa2cc5 JK	412	struct page *page;
	413
	414	if (!len)
	415	return;
	416
bd43df02 JK	417	f2fs_balance_fs(sbi);
bd43df02 JK	418
e479556b	419	f2fs_lock_op(sbi);
64aa7ed9	420	page = get_new_data_page(inode, NULL, index, false);
e479556b	421	f2fs_unlock_op(sbi);
fbfa2cc5 JK	422
	423	if (!IS_ERR(page)) {
	424	wait_on_page_writeback(page);
	425	zero_user(page, start, len);
	426	set_page_dirty(page);
	427	f2fs_put_page(page, 1);
	428	}
	429	}
	430
	431	int truncate_hole(struct inode *inode, pgoff_t pg_start, pgoff_t pg_end)
	432	{
	433	pgoff_t index;
	434	int err;
	435
	436	for (index = pg_start; index < pg_end; index++) {
	437	struct dnode_of_data dn;
9eaeba70	438
fbfa2cc5	439	set_new_dnode(&dn, inode, NULL, NULL, 0);
266e97a8	440	err = get_dnode_of_data(&dn, index, LOOKUP_NODE);
fbfa2cc5	441	if (err) {
fbfa2cc5 JK	442	if (err == -ENOENT)
	443	continue;
	444	return err;
	445	}
	446
	447	if (dn.data_blkaddr != NULL_ADDR)
	448	truncate_data_blocks_range(&dn, 1);
	449	f2fs_put_dnode(&dn);
fbfa2cc5 JK	450	}
	451	return 0;
	452	}
	453
a66c7b2f	454	static int punch_hole(struct inode *inode, loff_t offset, loff_t len)
fbfa2cc5 JK	455	{
	456	pgoff_t pg_start, pg_end;
	457	loff_t off_start, off_end;
	458	int ret = 0;
	459
9e09fc85	460	ret = f2fs_convert_inline_data(inode, MAX_INLINE_DATA + 1);
8230a0a4 JK	461	if (ret)
8230a0a4 JK	462	return ret;
9ffe0fb5	463
fbfa2cc5 JK	464	pg_start = ((unsigned long long) offset) >> PAGE_CACHE_SHIFT;
	465	pg_end = ((unsigned long long) offset + len) >> PAGE_CACHE_SHIFT;
	466
	467	off_start = offset & (PAGE_CACHE_SIZE - 1);
	468	off_end = (offset + len) & (PAGE_CACHE_SIZE - 1);
	469
	470	if (pg_start == pg_end) {
	471	fill_zero(inode, pg_start, off_start,
	472	off_end - off_start);
	473	} else {
	474	if (off_start)
	475	fill_zero(inode, pg_start++, off_start,
	476	PAGE_CACHE_SIZE - off_start);
	477	if (off_end)
	478	fill_zero(inode, pg_end, 0, off_end);
	479
	480	if (pg_start < pg_end) {
	481	struct address_space *mapping = inode->i_mapping;
	482	loff_t blk_start, blk_end;
1127a3d4 JH	483	struct f2fs_sb_info *sbi = F2FS_SB(inode->i_sb);
	484
	485	f2fs_balance_fs(sbi);
fbfa2cc5 JK	486
	487	blk_start = pg_start << PAGE_CACHE_SHIFT;
	488	blk_end = pg_end << PAGE_CACHE_SHIFT;
	489	truncate_inode_pages_range(mapping, blk_start,
	490	blk_end - 1);
39936837	491
e479556b	492	f2fs_lock_op(sbi);
fbfa2cc5	493	ret = truncate_hole(inode, pg_start, pg_end);
e479556b	494	f2fs_unlock_op(sbi);
fbfa2cc5 JK	495	}
	496	}
	497
fbfa2cc5 JK	498	return ret;
	499	}
	500
	501	static int expand_inode_data(struct inode *inode, loff_t offset,
	502	loff_t len, int mode)
	503	{
	504	struct f2fs_sb_info *sbi = F2FS_SB(inode->i_sb);
	505	pgoff_t index, pg_start, pg_end;
	506	loff_t new_size = i_size_read(inode);
	507	loff_t off_start, off_end;
	508	int ret = 0;
	509
	510	ret = inode_newsize_ok(inode, (len + offset));
	511	if (ret)
	512	return ret;
	513
9e09fc85 JK	514	ret = f2fs_convert_inline_data(inode, offset + len);
	515	if (ret)
	516	return ret;
	517
fbfa2cc5 JK	518	pg_start = ((unsigned long long) offset) >> PAGE_CACHE_SHIFT;
	519	pg_end = ((unsigned long long) offset + len) >> PAGE_CACHE_SHIFT;
	520
	521	off_start = offset & (PAGE_CACHE_SIZE - 1);
	522	off_end = (offset + len) & (PAGE_CACHE_SIZE - 1);
	523
	524	for (index = pg_start; index <= pg_end; index++) {
	525	struct dnode_of_data dn;
	526
e479556b	527	f2fs_lock_op(sbi);
fbfa2cc5	528	set_new_dnode(&dn, inode, NULL, NULL, 0);
b600965c HL	529	ret = f2fs_reserve_block(&dn, index);
	530	f2fs_unlock_op(sbi);
	531	if (ret)
fbfa2cc5	532	break;
fbfa2cc5	533
fbfa2cc5 JK	534	if (pg_start == pg_end)
	535	new_size = offset + len;
	536	else if (index == pg_start && off_start)
	537	new_size = (index + 1) << PAGE_CACHE_SHIFT;
	538	else if (index == pg_end)
	539	new_size = (index << PAGE_CACHE_SHIFT) + off_end;
	540	else
	541	new_size += PAGE_CACHE_SIZE;
	542	}
	543
	544	if (!(mode & FALLOC_FL_KEEP_SIZE) &&
	545	i_size_read(inode) < new_size) {
	546	i_size_write(inode, new_size);
	547	mark_inode_dirty(inode);
	548	}
	549
	550	return ret;
	551	}
	552
	553	static long f2fs_fallocate(struct file *file, int mode,
	554	loff_t offset, loff_t len)
	555	{
6131ffaa	556	struct inode *inode = file_inode(file);
fbfa2cc5 JK	557	long ret;
	558
	559	if (mode & ~(FALLOC_FL_KEEP_SIZE \| FALLOC_FL_PUNCH_HOLE))
	560	return -EOPNOTSUPP;
	561
	562	if (mode & FALLOC_FL_PUNCH_HOLE)
a66c7b2f	563	ret = punch_hole(inode, offset, len);
fbfa2cc5 JK	564	else
	565	ret = expand_inode_data(inode, offset, len, mode);
	566
3af60a49 NJ	567	if (!ret) {
	568	inode->i_mtime = inode->i_ctime = CURRENT_TIME;
	569	mark_inode_dirty(inode);
	570	}
c01e2853	571	trace_f2fs_fallocate(inode, mode, offset, len, ret);
fbfa2cc5 JK	572	return ret;
	573	}
	574
	575	#define F2FS_REG_FLMASK (~(FS_DIRSYNC_FL \| FS_TOPDIR_FL))
	576	#define F2FS_OTHER_FLMASK (FS_NODUMP_FL \| FS_NOATIME_FL)
	577
	578	static inline __u32 f2fs_mask_flags(umode_t mode, __u32 flags)
	579	{
	580	if (S_ISDIR(mode))
	581	return flags;
	582	else if (S_ISREG(mode))
	583	return flags & F2FS_REG_FLMASK;
	584	else
	585	return flags & F2FS_OTHER_FLMASK;
	586	}
	587
	588	long f2fs_ioctl(struct file *filp, unsigned int cmd, unsigned long arg)
	589	{
6131ffaa	590	struct inode *inode = file_inode(filp);
fbfa2cc5 JK	591	struct f2fs_inode_info *fi = F2FS_I(inode);
	592	unsigned int flags;
	593	int ret;
	594
	595	switch (cmd) {
6a3e8ef0	596	case F2FS_IOC_GETFLAGS:
fbfa2cc5 JK	597	flags = fi->i_flags & FS_FL_USER_VISIBLE;
fbfa2cc5 JK	598	return put_user(flags, (int __user *) arg);
6a3e8ef0	599	case F2FS_IOC_SETFLAGS:
fbfa2cc5 JK	600	{
	601	unsigned int oldflags;
	602
bdaec334	603	ret = mnt_want_write_file(filp);
fbfa2cc5 JK	604	if (ret)
	605	return ret;
	606
	607	if (!inode_owner_or_capable(inode)) {
	608	ret = -EACCES;
	609	goto out;
	610	}
	611
	612	if (get_user(flags, (int __user *) arg)) {
	613	ret = -EFAULT;
	614	goto out;
	615	}
	616
	617	flags = f2fs_mask_flags(inode->i_mode, flags);
	618
	619	mutex_lock(&inode->i_mutex);
	620
	621	oldflags = fi->i_flags;
	622
	623	if ((flags ^ oldflags) & (FS_APPEND_FL \| FS_IMMUTABLE_FL)) {
	624	if (!capable(CAP_LINUX_IMMUTABLE)) {
	625	mutex_unlock(&inode->i_mutex);
	626	ret = -EPERM;
	627	goto out;
	628	}
	629	}
	630
	631	flags = flags & FS_FL_USER_MODIFIABLE;
	632	flags \|= oldflags & ~FS_FL_USER_MODIFIABLE;
	633	fi->i_flags = flags;
	634	mutex_unlock(&inode->i_mutex);
	635
	636	f2fs_set_inode_flags(inode);
	637	inode->i_ctime = CURRENT_TIME;
	638	mark_inode_dirty(inode);
	639	out:
bdaec334	640	mnt_drop_write_file(filp);
fbfa2cc5 JK	641	return ret;
	642	}
	643	default:
	644	return -ENOTTY;
	645	}
	646	}
	647
e9750824 NJ	648	#ifdef CONFIG_COMPAT
	649	long f2fs_compat_ioctl(struct file *file, unsigned int cmd, unsigned long arg)
	650	{
	651	switch (cmd) {
	652	case F2FS_IOC32_GETFLAGS:
	653	cmd = F2FS_IOC_GETFLAGS;
	654	break;
	655	case F2FS_IOC32_SETFLAGS:
	656	cmd = F2FS_IOC_SETFLAGS;
	657	break;
	658	default:
	659	return -ENOIOCTLCMD;
	660	}
	661	return f2fs_ioctl(file, cmd, (unsigned long) compat_ptr(arg));
	662	}
	663	#endif
	664
fbfa2cc5 JK	665	const struct file_operations f2fs_file_operations = {
	666	.llseek = generic_file_llseek,
	667	.read = do_sync_read,
	668	.write = do_sync_write,
	669	.aio_read = generic_file_aio_read,
	670	.aio_write = generic_file_aio_write,
	671	.open = generic_file_open,
	672	.mmap = f2fs_file_mmap,
	673	.fsync = f2fs_sync_file,
	674	.fallocate = f2fs_fallocate,
	675	.unlocked_ioctl = f2fs_ioctl,
e9750824 NJ	676	#ifdef CONFIG_COMPAT
	677	.compat_ioctl = f2fs_compat_ioctl,
	678	#endif
fbfa2cc5 JK	679	.splice_read = generic_file_splice_read,
	680	.splice_write = generic_file_splice_write,
	681	};