[deliverable/linux.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);
	block_t old_blk_addr;
	struct dnode_of_data dn;
	int err, ilock;

	f2fs_balance_fs(sbi);

	sb_start_pagefault(inode->i_sb);

	/* block allocation */
	ilock = mutex_lock_op(sbi);
	set_new_dnode(&dn, inode, NULL, NULL, 0);
	err = get_dnode_of_data(&dn, page->index, ALLOC_NODE);
	if (err) {
		mutex_unlock_op(sbi, ilock);
		goto out;
	}

	old_blk_addr = dn.data_blkaddr;

	if (old_blk_addr == NULL_ADDR) {
		err = reserve_new_block(&dn);
		if (err) {
			f2fs_put_dnode(&dn);
			mutex_unlock_op(sbi, ilock);
			goto out;
		}
	}
	f2fs_put_dnode(&dn);
	mutex_unlock_op(sbi, ilock);

	file_update_time(vma->vm_file);
	lock_page(page);
	if (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);

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;

	inode = igrab(dentry->d_parent->d_inode);
	dput(dentry);

	*pino = inode->i_ino;
	iput(inode);
	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_ALL,
		.nr_to_write = LONG_MAX,
		.for_reclaim = 0,
	};

	if (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);

	if (datasync && !(inode->i_state & I_DIRTY_DATASYNC))
		goto out;

	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;

	if (need_cp) {
		nid_t pino;

		/* 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;
		}
		filemap_fdatawait_range(sbi->node_inode->i_mapping,
							0, LONG_MAX);
		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 = page_address(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 (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);
}

static 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, ilock = -1;
	int err;

	trace_f2fs_truncate_blocks_enter(inode, from);

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

	ilock = mutex_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;
		mutex_unlock_op(sbi, ilock);
		trace_f2fs_truncate_blocks_exit(inode, err);
		return err;
	}

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

	count -= dn.ofs_in_node;
	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);
	mutex_unlock_op(sbi, ilock);

	/* 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)) {
		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;
	int ilock;

	if (!len)
		return;

	f2fs_balance_fs(sbi);

	ilock = mutex_lock_op(sbi);
	page = get_new_data_page(inode, NULL, index, false);
	mutex_unlock_op(sbi, ilock);

	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, int mode)
{
	pgoff_t pg_start, pg_end;
	loff_t off_start, off_end;
	int ret = 0;

	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);
			int ilock;

			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);

			ilock = mutex_lock_op(sbi);
			ret = truncate_hole(inode, pg_start, pg_end);
			mutex_unlock_op(sbi, ilock);
		}
	}

	if (!(mode & FALLOC_FL_KEEP_SIZE) &&
		i_size_read(inode) <= (offset + len)) {
		i_size_write(inode, offset);
		mark_inode_dirty(inode);
	}

	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;

	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;
		int ilock;

		ilock = mutex_lock_op(sbi);
		set_new_dnode(&dn, inode, NULL, NULL, 0);
		ret = get_dnode_of_data(&dn, index, ALLOC_NODE);
		if (ret) {
			mutex_unlock_op(sbi, ilock);
			break;
		}

		if (dn.data_blkaddr == NULL_ADDR) {
			ret = reserve_new_block(&dn);
			if (ret) {
				f2fs_put_dnode(&dn);
				mutex_unlock_op(sbi, ilock);
				break;
			}
		}
		f2fs_put_dnode(&dn);
		mutex_unlock_op(sbi, ilock);

		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, mode);
	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 JK	36	block_t old_blk_addr;
fbfa2cc5 JK	37	struct dnode_of_data dn;
39936837	38	int err, ilock;
fbfa2cc5 JK	39
	40	f2fs_balance_fs(sbi);
	41
	42	sb_start_pagefault(inode->i_sb);
	43
fbfa2cc5	44	/* block allocation */
39936837	45	ilock = mutex_lock_op(sbi);
fbfa2cc5	46	set_new_dnode(&dn, inode, NULL, NULL, 0);
266e97a8	47	err = get_dnode_of_data(&dn, page->index, ALLOC_NODE);
fbfa2cc5	48	if (err) {
39936837	49	mutex_unlock_op(sbi, ilock);
fbfa2cc5 JK	50	goto out;
	51	}
	52
	53	old_blk_addr = dn.data_blkaddr;
fbfa2cc5 JK	54
	55	if (old_blk_addr == NULL_ADDR) {
	56	err = reserve_new_block(&dn);
	57	if (err) {
	58	f2fs_put_dnode(&dn);
39936837	59	mutex_unlock_op(sbi, ilock);
fbfa2cc5 JK	60	goto out;
	61	}
	62	}
	63	f2fs_put_dnode(&dn);
39936837	64	mutex_unlock_op(sbi, ilock);
fbfa2cc5	65
9851e6e1	66	file_update_time(vma->vm_file);
fbfa2cc5 JK	67	lock_page(page);
fbfa2cc5 JK	68	if (page->mapping != inode->i_mapping \|\|
9851e6e1	69	page_offset(page) > i_size_read(inode) \|\|
fbfa2cc5 JK	70	!PageUptodate(page)) {
	71	unlock_page(page);
	72	err = -EFAULT;
	73	goto out;
	74	}
	75
	76	/*
	77	* check to see if the page is mapped already (no holes)
	78	*/
	79	if (PageMappedToDisk(page))
9851e6e1	80	goto mapped;
fbfa2cc5 JK	81
	82	/* page is wholly or partially inside EOF */
	83	if (((page->index + 1) << PAGE_CACHE_SHIFT) > i_size_read(inode)) {
	84	unsigned offset;
	85	offset = i_size_read(inode) & ~PAGE_CACHE_MASK;
	86	zero_user_segment(page, offset, PAGE_CACHE_SIZE);
	87	}
	88	set_page_dirty(page);
	89	SetPageUptodate(page);
	90
9851e6e1 NJ	91	mapped:
	92	/* fill the page */
	93	wait_on_page_writeback(page);
fbfa2cc5 JK	94	out:
	95	sb_end_pagefault(inode->i_sb);
	96	return block_page_mkwrite_return(err);
	97	}
	98
	99	static const struct vm_operations_struct f2fs_file_vm_ops = {
692bb55d JK	100	.fault = filemap_fault,
	101	.page_mkwrite = f2fs_vm_page_mkwrite,
	102	.remap_pages = generic_file_remap_pages,
fbfa2cc5 JK	103	};
fbfa2cc5 JK	104
354a3399 JK	105	static int get_parent_ino(struct inode inode, nid_t pino)
	106	{
	107	struct dentry *dentry;
	108
	109	inode = igrab(inode);
	110	dentry = d_find_any_alias(inode);
	111	iput(inode);
	112	if (!dentry)
	113	return 0;
	114
	115	inode = igrab(dentry->d_parent->d_inode);
	116	dput(dentry);
	117
	118	*pino = inode->i_ino;
	119	iput(inode);
	120	return 1;
	121	}
	122
fbfa2cc5 JK	123	int f2fs_sync_file(struct file *file, loff_t start, loff_t end, int datasync)
	124	{
	125	struct inode *inode = file->f_mapping->host;
	126	struct f2fs_sb_info *sbi = F2FS_SB(inode->i_sb);
fbfa2cc5 JK	127	int ret = 0;
	128	bool need_cp = false;
	129	struct writeback_control wbc = {
	130	.sync_mode = WB_SYNC_ALL,
	131	.nr_to_write = LONG_MAX,
	132	.for_reclaim = 0,
	133	};
	134
77888c1e	135	if (f2fs_readonly(inode->i_sb))
1fa95b0b NJ	136	return 0;
1fa95b0b NJ	137
a2a4a7e4	138	trace_f2fs_sync_file_enter(inode);
fbfa2cc5	139	ret = filemap_write_and_wait_range(inode->i_mapping, start, end);
a2a4a7e4 NJ	140	if (ret) {
a2a4a7e4 NJ	141	trace_f2fs_sync_file_exit(inode, need_cp, datasync, ret);
fbfa2cc5	142	return ret;
a2a4a7e4	143	}
fbfa2cc5	144
7d82db83 JK	145	/* guarantee free sections for fsync */
	146	f2fs_balance_fs(sbi);
	147
fbfa2cc5 JK	148	mutex_lock(&inode->i_mutex);
fbfa2cc5 JK	149
fbfa2cc5 JK	150	if (datasync && !(inode->i_state & I_DIRTY_DATASYNC))
	151	goto out;
	152
fbfa2cc5 JK	153	if (!S_ISREG(inode->i_mode) \|\| inode->i_nlink != 1)
fbfa2cc5 JK	154	need_cp = true;
354a3399	155	else if (file_wrong_pino(inode))
fbfa2cc5	156	need_cp = true;
facb0205	157	else if (!space_for_roll_forward(sbi))
fbfa2cc5	158	need_cp = true;
953a3e27	159	else if (!is_checkpointed_node(sbi, F2FS_I(inode)->i_pino))
fbfa2cc5 JK	160	need_cp = true;
fbfa2cc5 JK	161
fbfa2cc5	162	if (need_cp) {
354a3399 JK	163	nid_t pino;
354a3399 JK	164
fbfa2cc5 JK	165	/* all the dirty node pages should be flushed for POR */
fbfa2cc5 JK	166	ret = f2fs_sync_fs(inode->i_sb, 1);
354a3399 JK	167	if (file_wrong_pino(inode) && inode->i_nlink == 1 &&
	168	get_parent_ino(inode, &pino)) {
	169	F2FS_I(inode)->i_pino = pino;
	170	file_got_pino(inode);
	171	mark_inode_dirty_sync(inode);
	172	ret = f2fs_write_inode(inode, NULL);
	173	if (ret)
	174	goto out;
	175	}
fbfa2cc5	176	} else {
398b1ac5 JK	177	/* if there is no written node page, write its inode page */
398b1ac5 JK	178	while (!sync_node_pages(sbi, inode->i_ino, &wbc)) {
b3783873	179	mark_inode_dirty_sync(inode);
398b1ac5 JK	180	ret = f2fs_write_inode(inode, NULL);
	181	if (ret)
	182	goto out;
	183	}
fbfa2cc5 JK	184	filemap_fdatawait_range(sbi->node_inode->i_mapping,
fbfa2cc5 JK	185	0, LONG_MAX);
ae51fb31	186	ret = blkdev_issue_flush(inode->i_sb->s_bdev, GFP_KERNEL, NULL);
fbfa2cc5 JK	187	}
	188	out:
	189	mutex_unlock(&inode->i_mutex);
a2a4a7e4	190	trace_f2fs_sync_file_exit(inode, need_cp, datasync, ret);
fbfa2cc5 JK	191	return ret;
	192	}
	193
	194	static int f2fs_file_mmap(struct file file, struct vm_area_struct vma)
	195	{
	196	file_accessed(file);
	197	vma->vm_ops = &f2fs_file_vm_ops;
	198	return 0;
	199	}
	200
b292dcab	201	int truncate_data_blocks_range(struct dnode_of_data *dn, int count)
fbfa2cc5 JK	202	{
	203	int nr_free = 0, ofs = dn->ofs_in_node;
	204	struct f2fs_sb_info *sbi = F2FS_SB(dn->inode->i_sb);
	205	struct f2fs_node *raw_node;
	206	__le32 *addr;
	207
	208	raw_node = page_address(dn->node_page);
	209	addr = blkaddr_in_node(raw_node) + ofs;
	210
	211	for ( ; count > 0; count--, addr++, dn->ofs_in_node++) {
	212	block_t blkaddr = le32_to_cpu(*addr);
	213	if (blkaddr == NULL_ADDR)
	214	continue;
	215
	216	update_extent_cache(NULL_ADDR, dn);
	217	invalidate_blocks(sbi, blkaddr);
fbfa2cc5 JK	218	nr_free++;
	219	}
	220	if (nr_free) {
d7cc950b	221	dec_valid_block_count(sbi, dn->inode, nr_free);
fbfa2cc5 JK	222	set_page_dirty(dn->node_page);
	223	sync_inode_page(dn);
	224	}
	225	dn->ofs_in_node = ofs;
51dd6249 NJ	226
	227	trace_f2fs_truncate_data_blocks_range(dn->inode, dn->nid,
	228	dn->ofs_in_node, nr_free);
fbfa2cc5 JK	229	return nr_free;
	230	}
	231
	232	void truncate_data_blocks(struct dnode_of_data *dn)
	233	{
	234	truncate_data_blocks_range(dn, ADDRS_PER_BLOCK);
	235	}
	236
	237	static void truncate_partial_data_page(struct inode *inode, u64 from)
	238	{
	239	unsigned offset = from & (PAGE_CACHE_SIZE - 1);
	240	struct page *page;
	241
	242	if (!offset)
	243	return;
	244
c718379b	245	page = find_data_page(inode, from >> PAGE_CACHE_SHIFT, false);
fbfa2cc5 JK	246	if (IS_ERR(page))
	247	return;
	248
	249	lock_page(page);
afcb7ca0 JK	250	if (page->mapping != inode->i_mapping) {
	251	f2fs_put_page(page, 1);
	252	return;
	253	}
fbfa2cc5 JK	254	wait_on_page_writeback(page);
	255	zero_user(page, offset, PAGE_CACHE_SIZE - offset);
	256	set_page_dirty(page);
	257	f2fs_put_page(page, 1);
	258	}
	259
	260	static int truncate_blocks(struct inode *inode, u64 from)
	261	{
	262	struct f2fs_sb_info *sbi = F2FS_SB(inode->i_sb);
	263	unsigned int blocksize = inode->i_sb->s_blocksize;
	264	struct dnode_of_data dn;
	265	pgoff_t free_from;
39936837	266	int count = 0, ilock = -1;
fbfa2cc5 JK	267	int err;
fbfa2cc5 JK	268
51dd6249 NJ	269	trace_f2fs_truncate_blocks_enter(inode, from);
51dd6249 NJ	270
fbfa2cc5 JK	271	free_from = (pgoff_t)
	272	((from + blocksize - 1) >> (sbi->log_blocksize));
	273
39936837	274	ilock = mutex_lock_op(sbi);
fbfa2cc5	275	set_new_dnode(&dn, inode, NULL, NULL, 0);
266e97a8	276	err = get_dnode_of_data(&dn, free_from, LOOKUP_NODE);
fbfa2cc5 JK	277	if (err) {
	278	if (err == -ENOENT)
	279	goto free_next;
39936837	280	mutex_unlock_op(sbi, ilock);
51dd6249	281	trace_f2fs_truncate_blocks_exit(inode, err);
fbfa2cc5 JK	282	return err;
	283	}
	284
	285	if (IS_INODE(dn.node_page))
	286	count = ADDRS_PER_INODE;
	287	else
	288	count = ADDRS_PER_BLOCK;
	289
	290	count -= dn.ofs_in_node;
	291	BUG_ON(count < 0);
39936837	292
fbfa2cc5 JK	293	if (dn.ofs_in_node \|\| IS_INODE(dn.node_page)) {
	294	truncate_data_blocks_range(&dn, count);
	295	free_from += count;
	296	}
	297
	298	f2fs_put_dnode(&dn);
	299	free_next:
	300	err = truncate_inode_blocks(inode, free_from);
39936837	301	mutex_unlock_op(sbi, ilock);
fbfa2cc5 JK	302
	303	/* lastly zero out the first data page */
	304	truncate_partial_data_page(inode, from);
	305
51dd6249	306	trace_f2fs_truncate_blocks_exit(inode, err);
fbfa2cc5 JK	307	return err;
	308	}
	309
	310	void f2fs_truncate(struct inode *inode)
	311	{
	312	if (!(S_ISREG(inode->i_mode) \|\| S_ISDIR(inode->i_mode) \|\|
	313	S_ISLNK(inode->i_mode)))
	314	return;
	315
51dd6249 NJ	316	trace_f2fs_truncate(inode);
51dd6249 NJ	317
fbfa2cc5 JK	318	if (!truncate_blocks(inode, i_size_read(inode))) {
	319	inode->i_mtime = inode->i_ctime = CURRENT_TIME;
	320	mark_inode_dirty(inode);
	321	}
fbfa2cc5 JK	322	}
fbfa2cc5 JK	323
2d4d9fb5	324	int f2fs_getattr(struct vfsmount *mnt,
fbfa2cc5 JK	325	struct dentry dentry, struct kstat stat)
	326	{
	327	struct inode *inode = dentry->d_inode;
	328	generic_fillattr(inode, stat);
	329	stat->blocks <<= 3;
	330	return 0;
	331	}
	332
	333	#ifdef CONFIG_F2FS_FS_POSIX_ACL
	334	static void __setattr_copy(struct inode inode, const struct iattr attr)
	335	{
	336	struct f2fs_inode_info *fi = F2FS_I(inode);
	337	unsigned int ia_valid = attr->ia_valid;
	338
	339	if (ia_valid & ATTR_UID)
	340	inode->i_uid = attr->ia_uid;
	341	if (ia_valid & ATTR_GID)
	342	inode->i_gid = attr->ia_gid;
	343	if (ia_valid & ATTR_ATIME)
	344	inode->i_atime = timespec_trunc(attr->ia_atime,
	345	inode->i_sb->s_time_gran);
	346	if (ia_valid & ATTR_MTIME)
	347	inode->i_mtime = timespec_trunc(attr->ia_mtime,
	348	inode->i_sb->s_time_gran);
	349	if (ia_valid & ATTR_CTIME)
	350	inode->i_ctime = timespec_trunc(attr->ia_ctime,
	351	inode->i_sb->s_time_gran);
	352	if (ia_valid & ATTR_MODE) {
	353	umode_t mode = attr->ia_mode;
	354
	355	if (!in_group_p(inode->i_gid) && !capable(CAP_FSETID))
	356	mode &= ~S_ISGID;
	357	set_acl_inode(fi, mode);
	358	}
	359	}
	360	#else
	361	#define __setattr_copy setattr_copy
	362	#endif
	363
	364	int f2fs_setattr(struct dentry dentry, struct iattr attr)
	365	{
	366	struct inode *inode = dentry->d_inode;
	367	struct f2fs_inode_info *fi = F2FS_I(inode);
	368	int err;
	369
	370	err = inode_change_ok(inode, attr);
	371	if (err)
	372	return err;
	373
	374	if ((attr->ia_valid & ATTR_SIZE) &&
	375	attr->ia_size != i_size_read(inode)) {
	376	truncate_setsize(inode, attr->ia_size);
	377	f2fs_truncate(inode);
d4686d56	378	f2fs_balance_fs(F2FS_SB(inode->i_sb));
fbfa2cc5 JK	379	}
	380
	381	__setattr_copy(inode, attr);
	382
	383	if (attr->ia_valid & ATTR_MODE) {
	384	err = f2fs_acl_chmod(inode);
	385	if (err \|\| is_inode_flag_set(fi, FI_ACL_MODE)) {
	386	inode->i_mode = fi->i_acl_mode;
	387	clear_inode_flag(fi, FI_ACL_MODE);
	388	}
	389	}
	390
	391	mark_inode_dirty(inode);
	392	return err;
	393	}
	394
	395	const struct inode_operations f2fs_file_inode_operations = {
	396	.getattr = f2fs_getattr,
	397	.setattr = f2fs_setattr,
	398	.get_acl = f2fs_get_acl,
	399	#ifdef CONFIG_F2FS_FS_XATTR
	400	.setxattr = generic_setxattr,
	401	.getxattr = generic_getxattr,
	402	.listxattr = f2fs_listxattr,
	403	.removexattr = generic_removexattr,
	404	#endif
	405	};
	406
	407	static void fill_zero(struct inode *inode, pgoff_t index,
	408	loff_t start, loff_t len)
	409	{
bd43df02	410	struct f2fs_sb_info *sbi = F2FS_SB(inode->i_sb);
fbfa2cc5	411	struct page *page;
39936837	412	int ilock;
fbfa2cc5 JK	413
	414	if (!len)
	415	return;
	416
bd43df02 JK	417	f2fs_balance_fs(sbi);
bd43df02 JK	418
39936837	419	ilock = mutex_lock_op(sbi);
64aa7ed9	420	page = get_new_data_page(inode, NULL, index, false);
39936837	421	mutex_unlock_op(sbi, ilock);
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
	454	static int punch_hole(struct inode *inode, loff_t offset, loff_t len, int mode)
	455	{
	456	pgoff_t pg_start, pg_end;
	457	loff_t off_start, off_end;
	458	int ret = 0;
	459
	460	pg_start = ((unsigned long long) offset) >> PAGE_CACHE_SHIFT;
	461	pg_end = ((unsigned long long) offset + len) >> PAGE_CACHE_SHIFT;
	462
	463	off_start = offset & (PAGE_CACHE_SIZE - 1);
	464	off_end = (offset + len) & (PAGE_CACHE_SIZE - 1);
	465
	466	if (pg_start == pg_end) {
	467	fill_zero(inode, pg_start, off_start,
	468	off_end - off_start);
	469	} else {
	470	if (off_start)
	471	fill_zero(inode, pg_start++, off_start,
	472	PAGE_CACHE_SIZE - off_start);
	473	if (off_end)
	474	fill_zero(inode, pg_end, 0, off_end);
	475
	476	if (pg_start < pg_end) {
	477	struct address_space *mapping = inode->i_mapping;
	478	loff_t blk_start, blk_end;
1127a3d4	479	struct f2fs_sb_info *sbi = F2FS_SB(inode->i_sb);
39936837	480	int ilock;
1127a3d4 JH	481
1127a3d4 JH	482	f2fs_balance_fs(sbi);
fbfa2cc5 JK	483
	484	blk_start = pg_start << PAGE_CACHE_SHIFT;
	485	blk_end = pg_end << PAGE_CACHE_SHIFT;
	486	truncate_inode_pages_range(mapping, blk_start,
	487	blk_end - 1);
39936837 JK	488
39936837 JK	489	ilock = mutex_lock_op(sbi);
fbfa2cc5	490	ret = truncate_hole(inode, pg_start, pg_end);
39936837	491	mutex_unlock_op(sbi, ilock);
fbfa2cc5 JK	492	}
	493	}
	494
	495	if (!(mode & FALLOC_FL_KEEP_SIZE) &&
	496	i_size_read(inode) <= (offset + len)) {
	497	i_size_write(inode, offset);
	498	mark_inode_dirty(inode);
	499	}
	500
	501	return ret;
	502	}
	503
	504	static int expand_inode_data(struct inode *inode, loff_t offset,
	505	loff_t len, int mode)
	506	{
	507	struct f2fs_sb_info *sbi = F2FS_SB(inode->i_sb);
	508	pgoff_t index, pg_start, pg_end;
	509	loff_t new_size = i_size_read(inode);
	510	loff_t off_start, off_end;
	511	int ret = 0;
	512
	513	ret = inode_newsize_ok(inode, (len + offset));
	514	if (ret)
	515	return ret;
	516
	517	pg_start = ((unsigned long long) offset) >> PAGE_CACHE_SHIFT;
	518	pg_end = ((unsigned long long) offset + len) >> PAGE_CACHE_SHIFT;
	519
	520	off_start = offset & (PAGE_CACHE_SIZE - 1);
	521	off_end = (offset + len) & (PAGE_CACHE_SIZE - 1);
	522
	523	for (index = pg_start; index <= pg_end; index++) {
	524	struct dnode_of_data dn;
39936837	525	int ilock;
fbfa2cc5	526
39936837	527	ilock = mutex_lock_op(sbi);
fbfa2cc5	528	set_new_dnode(&dn, inode, NULL, NULL, 0);
266e97a8	529	ret = get_dnode_of_data(&dn, index, ALLOC_NODE);
fbfa2cc5	530	if (ret) {
39936837	531	mutex_unlock_op(sbi, ilock);
fbfa2cc5 JK	532	break;
	533	}
	534
	535	if (dn.data_blkaddr == NULL_ADDR) {
	536	ret = reserve_new_block(&dn);
	537	if (ret) {
	538	f2fs_put_dnode(&dn);
39936837	539	mutex_unlock_op(sbi, ilock);
fbfa2cc5 JK	540	break;
	541	}
	542	}
	543	f2fs_put_dnode(&dn);
39936837	544	mutex_unlock_op(sbi, ilock);
fbfa2cc5 JK	545
	546	if (pg_start == pg_end)
	547	new_size = offset + len;
	548	else if (index == pg_start && off_start)
	549	new_size = (index + 1) << PAGE_CACHE_SHIFT;
	550	else if (index == pg_end)
	551	new_size = (index << PAGE_CACHE_SHIFT) + off_end;
	552	else
	553	new_size += PAGE_CACHE_SIZE;
	554	}
	555
	556	if (!(mode & FALLOC_FL_KEEP_SIZE) &&
	557	i_size_read(inode) < new_size) {
	558	i_size_write(inode, new_size);
	559	mark_inode_dirty(inode);
	560	}
	561
	562	return ret;
	563	}
	564
	565	static long f2fs_fallocate(struct file *file, int mode,
	566	loff_t offset, loff_t len)
	567	{
6131ffaa	568	struct inode *inode = file_inode(file);
fbfa2cc5 JK	569	long ret;
	570
	571	if (mode & ~(FALLOC_FL_KEEP_SIZE \| FALLOC_FL_PUNCH_HOLE))
	572	return -EOPNOTSUPP;
	573
	574	if (mode & FALLOC_FL_PUNCH_HOLE)
	575	ret = punch_hole(inode, offset, len, mode);
	576	else
	577	ret = expand_inode_data(inode, offset, len, mode);
	578
3af60a49 NJ	579	if (!ret) {
	580	inode->i_mtime = inode->i_ctime = CURRENT_TIME;
	581	mark_inode_dirty(inode);
	582	}
c01e2853	583	trace_f2fs_fallocate(inode, mode, offset, len, ret);
fbfa2cc5 JK	584	return ret;
	585	}
	586
	587	#define F2FS_REG_FLMASK (~(FS_DIRSYNC_FL \| FS_TOPDIR_FL))
	588	#define F2FS_OTHER_FLMASK (FS_NODUMP_FL \| FS_NOATIME_FL)
	589
	590	static inline __u32 f2fs_mask_flags(umode_t mode, __u32 flags)
	591	{
	592	if (S_ISDIR(mode))
	593	return flags;
	594	else if (S_ISREG(mode))
	595	return flags & F2FS_REG_FLMASK;
	596	else
	597	return flags & F2FS_OTHER_FLMASK;
	598	}
	599
	600	long f2fs_ioctl(struct file *filp, unsigned int cmd, unsigned long arg)
	601	{
6131ffaa	602	struct inode *inode = file_inode(filp);
fbfa2cc5 JK	603	struct f2fs_inode_info *fi = F2FS_I(inode);
	604	unsigned int flags;
	605	int ret;
	606
	607	switch (cmd) {
6a3e8ef0	608	case F2FS_IOC_GETFLAGS:
fbfa2cc5 JK	609	flags = fi->i_flags & FS_FL_USER_VISIBLE;
fbfa2cc5 JK	610	return put_user(flags, (int __user *) arg);
6a3e8ef0	611	case F2FS_IOC_SETFLAGS:
fbfa2cc5 JK	612	{
	613	unsigned int oldflags;
	614
bdaec334	615	ret = mnt_want_write_file(filp);
fbfa2cc5 JK	616	if (ret)
	617	return ret;
	618
	619	if (!inode_owner_or_capable(inode)) {
	620	ret = -EACCES;
	621	goto out;
	622	}
	623
	624	if (get_user(flags, (int __user *) arg)) {
	625	ret = -EFAULT;
	626	goto out;
	627	}
	628
	629	flags = f2fs_mask_flags(inode->i_mode, flags);
	630
	631	mutex_lock(&inode->i_mutex);
	632
	633	oldflags = fi->i_flags;
	634
	635	if ((flags ^ oldflags) & (FS_APPEND_FL \| FS_IMMUTABLE_FL)) {
	636	if (!capable(CAP_LINUX_IMMUTABLE)) {
	637	mutex_unlock(&inode->i_mutex);
	638	ret = -EPERM;
	639	goto out;
	640	}
	641	}
	642
	643	flags = flags & FS_FL_USER_MODIFIABLE;
	644	flags \|= oldflags & ~FS_FL_USER_MODIFIABLE;
	645	fi->i_flags = flags;
	646	mutex_unlock(&inode->i_mutex);
	647
	648	f2fs_set_inode_flags(inode);
	649	inode->i_ctime = CURRENT_TIME;
	650	mark_inode_dirty(inode);
	651	out:
bdaec334	652	mnt_drop_write_file(filp);
fbfa2cc5 JK	653	return ret;
	654	}
	655	default:
	656	return -ENOTTY;
	657	}
	658	}
	659
e9750824 NJ	660	#ifdef CONFIG_COMPAT
	661	long f2fs_compat_ioctl(struct file *file, unsigned int cmd, unsigned long arg)
	662	{
	663	switch (cmd) {
	664	case F2FS_IOC32_GETFLAGS:
	665	cmd = F2FS_IOC_GETFLAGS;
	666	break;
	667	case F2FS_IOC32_SETFLAGS:
	668	cmd = F2FS_IOC_SETFLAGS;
	669	break;
	670	default:
	671	return -ENOIOCTLCMD;
	672	}
	673	return f2fs_ioctl(file, cmd, (unsigned long) compat_ptr(arg));
	674	}
	675	#endif
	676
fbfa2cc5 JK	677	const struct file_operations f2fs_file_operations = {
	678	.llseek = generic_file_llseek,
	679	.read = do_sync_read,
	680	.write = do_sync_write,
	681	.aio_read = generic_file_aio_read,
	682	.aio_write = generic_file_aio_write,
	683	.open = generic_file_open,
	684	.mmap = f2fs_file_mmap,
	685	.fsync = f2fs_sync_file,
	686	.fallocate = f2fs_fallocate,
	687	.unlocked_ioctl = f2fs_ioctl,
e9750824 NJ	688	#ifdef CONFIG_COMPAT
	689	.compat_ioctl = f2fs_compat_ioctl,
	690	#endif
fbfa2cc5 JK	691	.splice_read = generic_file_splice_read,
	692	.splice_write = generic_file_splice_write,
	693	};