[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;

	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_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);

	/*
	 * 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;

	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 = 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 (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
f0947e5c JK	115	if (update_dent_inode(inode, &dentry->d_name)) {
	116	dput(dentry);
	117	return 0;
	118	}
354a3399	119
f0947e5c JK	120	*pino = parent_ino(dentry);
f0947e5c JK	121	dput(dentry);
354a3399 JK	122	return 1;
	123	}
	124
fbfa2cc5 JK	125	int f2fs_sync_file(struct file *file, loff_t start, loff_t end, int datasync)
	126	{
	127	struct inode *inode = file->f_mapping->host;
	128	struct f2fs_sb_info *sbi = F2FS_SB(inode->i_sb);
fbfa2cc5 JK	129	int ret = 0;
	130	bool need_cp = false;
	131	struct writeback_control wbc = {
	132	.sync_mode = WB_SYNC_ALL,
	133	.nr_to_write = LONG_MAX,
	134	.for_reclaim = 0,
	135	};
	136
77888c1e	137	if (f2fs_readonly(inode->i_sb))
1fa95b0b NJ	138	return 0;
1fa95b0b NJ	139
a2a4a7e4	140	trace_f2fs_sync_file_enter(inode);
fbfa2cc5	141	ret = filemap_write_and_wait_range(inode->i_mapping, start, end);
a2a4a7e4 NJ	142	if (ret) {
a2a4a7e4 NJ	143	trace_f2fs_sync_file_exit(inode, need_cp, datasync, ret);
fbfa2cc5	144	return ret;
a2a4a7e4	145	}
fbfa2cc5	146
7d82db83 JK	147	/* guarantee free sections for fsync */
	148	f2fs_balance_fs(sbi);
	149
fbfa2cc5 JK	150	mutex_lock(&inode->i_mutex);
fbfa2cc5 JK	151
e5d2385e JK	152	/*
	153	* Both of fdatasync() and fsync() are able to be recovered from
	154	* sudden-power-off.
	155	*/
fbfa2cc5 JK	156	if (!S_ISREG(inode->i_mode) \|\| inode->i_nlink != 1)
fbfa2cc5 JK	157	need_cp = true;
354a3399	158	else if (file_wrong_pino(inode))
fbfa2cc5	159	need_cp = true;
facb0205	160	else if (!space_for_roll_forward(sbi))
fbfa2cc5	161	need_cp = true;
953a3e27	162	else if (!is_checkpointed_node(sbi, F2FS_I(inode)->i_pino))
fbfa2cc5 JK	163	need_cp = true;
fbfa2cc5 JK	164
fbfa2cc5	165	if (need_cp) {
354a3399 JK	166	nid_t pino;
354a3399 JK	167
fbfa2cc5 JK	168	/* all the dirty node pages should be flushed for POR */
fbfa2cc5 JK	169	ret = f2fs_sync_fs(inode->i_sb, 1);
354a3399 JK	170	if (file_wrong_pino(inode) && inode->i_nlink == 1 &&
	171	get_parent_ino(inode, &pino)) {
	172	F2FS_I(inode)->i_pino = pino;
	173	file_got_pino(inode);
	174	mark_inode_dirty_sync(inode);
	175	ret = f2fs_write_inode(inode, NULL);
	176	if (ret)
	177	goto out;
	178	}
fbfa2cc5	179	} else {
398b1ac5 JK	180	/* if there is no written node page, write its inode page */
398b1ac5 JK	181	while (!sync_node_pages(sbi, inode->i_ino, &wbc)) {
b3783873	182	mark_inode_dirty_sync(inode);
398b1ac5 JK	183	ret = f2fs_write_inode(inode, NULL);
	184	if (ret)
	185	goto out;
	186	}
fbfa2cc5 JK	187	filemap_fdatawait_range(sbi->node_inode->i_mapping,
fbfa2cc5 JK	188	0, LONG_MAX);
ae51fb31	189	ret = blkdev_issue_flush(inode->i_sb->s_bdev, GFP_KERNEL, NULL);
fbfa2cc5 JK	190	}
	191	out:
	192	mutex_unlock(&inode->i_mutex);
a2a4a7e4	193	trace_f2fs_sync_file_exit(inode, need_cp, datasync, ret);
fbfa2cc5 JK	194	return ret;
	195	}
	196
	197	static int f2fs_file_mmap(struct file file, struct vm_area_struct vma)
	198	{
	199	file_accessed(file);
	200	vma->vm_ops = &f2fs_file_vm_ops;
	201	return 0;
	202	}
	203
b292dcab	204	int truncate_data_blocks_range(struct dnode_of_data *dn, int count)
fbfa2cc5 JK	205	{
	206	int nr_free = 0, ofs = dn->ofs_in_node;
	207	struct f2fs_sb_info *sbi = F2FS_SB(dn->inode->i_sb);
	208	struct f2fs_node *raw_node;
	209	__le32 *addr;
	210
45590710	211	raw_node = F2FS_NODE(dn->node_page);
fbfa2cc5 JK	212	addr = blkaddr_in_node(raw_node) + ofs;
	213
	214	for ( ; count > 0; count--, addr++, dn->ofs_in_node++) {
	215	block_t blkaddr = le32_to_cpu(*addr);
	216	if (blkaddr == NULL_ADDR)
	217	continue;
	218
	219	update_extent_cache(NULL_ADDR, dn);
	220	invalidate_blocks(sbi, blkaddr);
fbfa2cc5 JK	221	nr_free++;
	222	}
	223	if (nr_free) {
d7cc950b	224	dec_valid_block_count(sbi, dn->inode, nr_free);
fbfa2cc5 JK	225	set_page_dirty(dn->node_page);
	226	sync_inode_page(dn);
	227	}
	228	dn->ofs_in_node = ofs;
51dd6249 NJ	229
	230	trace_f2fs_truncate_data_blocks_range(dn->inode, dn->nid,
	231	dn->ofs_in_node, nr_free);
fbfa2cc5 JK	232	return nr_free;
	233	}
	234
	235	void truncate_data_blocks(struct dnode_of_data *dn)
	236	{
	237	truncate_data_blocks_range(dn, ADDRS_PER_BLOCK);
	238	}
	239
	240	static void truncate_partial_data_page(struct inode *inode, u64 from)
	241	{
	242	unsigned offset = from & (PAGE_CACHE_SIZE - 1);
	243	struct page *page;
	244
	245	if (!offset)
	246	return;
	247
c718379b	248	page = find_data_page(inode, from >> PAGE_CACHE_SHIFT, false);
fbfa2cc5 JK	249	if (IS_ERR(page))
	250	return;
	251
	252	lock_page(page);
afcb7ca0 JK	253	if (page->mapping != inode->i_mapping) {
	254	f2fs_put_page(page, 1);
	255	return;
	256	}
fbfa2cc5 JK	257	wait_on_page_writeback(page);
	258	zero_user(page, offset, PAGE_CACHE_SIZE - offset);
	259	set_page_dirty(page);
	260	f2fs_put_page(page, 1);
	261	}
	262
	263	static int truncate_blocks(struct inode *inode, u64 from)
	264	{
	265	struct f2fs_sb_info *sbi = F2FS_SB(inode->i_sb);
	266	unsigned int blocksize = inode->i_sb->s_blocksize;
	267	struct dnode_of_data dn;
	268	pgoff_t free_from;
39936837	269	int count = 0, ilock = -1;
fbfa2cc5 JK	270	int err;
fbfa2cc5 JK	271
51dd6249 NJ	272	trace_f2fs_truncate_blocks_enter(inode, from);
51dd6249 NJ	273
fbfa2cc5 JK	274	free_from = (pgoff_t)
	275	((from + blocksize - 1) >> (sbi->log_blocksize));
	276
39936837	277	ilock = mutex_lock_op(sbi);
fbfa2cc5	278	set_new_dnode(&dn, inode, NULL, NULL, 0);
266e97a8	279	err = get_dnode_of_data(&dn, free_from, LOOKUP_NODE);
fbfa2cc5 JK	280	if (err) {
	281	if (err == -ENOENT)
	282	goto free_next;
39936837	283	mutex_unlock_op(sbi, ilock);
51dd6249	284	trace_f2fs_truncate_blocks_exit(inode, err);
fbfa2cc5 JK	285	return err;
	286	}
	287
	288	if (IS_INODE(dn.node_page))
	289	count = ADDRS_PER_INODE;
	290	else
	291	count = ADDRS_PER_BLOCK;
	292
	293	count -= dn.ofs_in_node;
	294	BUG_ON(count < 0);
39936837	295
fbfa2cc5 JK	296	if (dn.ofs_in_node \|\| IS_INODE(dn.node_page)) {
	297	truncate_data_blocks_range(&dn, count);
	298	free_from += count;
	299	}
	300
	301	f2fs_put_dnode(&dn);
	302	free_next:
	303	err = truncate_inode_blocks(inode, free_from);
39936837	304	mutex_unlock_op(sbi, ilock);
fbfa2cc5 JK	305
	306	/* lastly zero out the first data page */
	307	truncate_partial_data_page(inode, from);
	308
51dd6249	309	trace_f2fs_truncate_blocks_exit(inode, err);
fbfa2cc5 JK	310	return err;
	311	}
	312
	313	void f2fs_truncate(struct inode *inode)
	314	{
	315	if (!(S_ISREG(inode->i_mode) \|\| S_ISDIR(inode->i_mode) \|\|
	316	S_ISLNK(inode->i_mode)))
	317	return;
	318
51dd6249 NJ	319	trace_f2fs_truncate(inode);
51dd6249 NJ	320
fbfa2cc5 JK	321	if (!truncate_blocks(inode, i_size_read(inode))) {
	322	inode->i_mtime = inode->i_ctime = CURRENT_TIME;
	323	mark_inode_dirty(inode);
	324	}
fbfa2cc5 JK	325	}
fbfa2cc5 JK	326
2d4d9fb5	327	int f2fs_getattr(struct vfsmount *mnt,
fbfa2cc5 JK	328	struct dentry dentry, struct kstat stat)
	329	{
	330	struct inode *inode = dentry->d_inode;
	331	generic_fillattr(inode, stat);
	332	stat->blocks <<= 3;
	333	return 0;
	334	}
	335
	336	#ifdef CONFIG_F2FS_FS_POSIX_ACL
	337	static void __setattr_copy(struct inode inode, const struct iattr attr)
	338	{
	339	struct f2fs_inode_info *fi = F2FS_I(inode);
	340	unsigned int ia_valid = attr->ia_valid;
	341
	342	if (ia_valid & ATTR_UID)
	343	inode->i_uid = attr->ia_uid;
	344	if (ia_valid & ATTR_GID)
	345	inode->i_gid = attr->ia_gid;
	346	if (ia_valid & ATTR_ATIME)
	347	inode->i_atime = timespec_trunc(attr->ia_atime,
	348	inode->i_sb->s_time_gran);
	349	if (ia_valid & ATTR_MTIME)
	350	inode->i_mtime = timespec_trunc(attr->ia_mtime,
	351	inode->i_sb->s_time_gran);
	352	if (ia_valid & ATTR_CTIME)
	353	inode->i_ctime = timespec_trunc(attr->ia_ctime,
	354	inode->i_sb->s_time_gran);
	355	if (ia_valid & ATTR_MODE) {
	356	umode_t mode = attr->ia_mode;
	357
	358	if (!in_group_p(inode->i_gid) && !capable(CAP_FSETID))
	359	mode &= ~S_ISGID;
	360	set_acl_inode(fi, mode);
	361	}
	362	}
	363	#else
	364	#define __setattr_copy setattr_copy
	365	#endif
	366
	367	int f2fs_setattr(struct dentry dentry, struct iattr attr)
	368	{
	369	struct inode *inode = dentry->d_inode;
	370	struct f2fs_inode_info *fi = F2FS_I(inode);
	371	int err;
	372
	373	err = inode_change_ok(inode, attr);
	374	if (err)
	375	return err;
	376
	377	if ((attr->ia_valid & ATTR_SIZE) &&
	378	attr->ia_size != i_size_read(inode)) {
	379	truncate_setsize(inode, attr->ia_size);
	380	f2fs_truncate(inode);
d4686d56	381	f2fs_balance_fs(F2FS_SB(inode->i_sb));
fbfa2cc5 JK	382	}
	383
	384	__setattr_copy(inode, attr);
	385
	386	if (attr->ia_valid & ATTR_MODE) {
	387	err = f2fs_acl_chmod(inode);
	388	if (err \|\| is_inode_flag_set(fi, FI_ACL_MODE)) {
	389	inode->i_mode = fi->i_acl_mode;
	390	clear_inode_flag(fi, FI_ACL_MODE);
	391	}
	392	}
	393
	394	mark_inode_dirty(inode);
	395	return err;
	396	}
	397
	398	const struct inode_operations f2fs_file_inode_operations = {
	399	.getattr = f2fs_getattr,
	400	.setattr = f2fs_setattr,
	401	.get_acl = f2fs_get_acl,
	402	#ifdef CONFIG_F2FS_FS_XATTR
	403	.setxattr = generic_setxattr,
	404	.getxattr = generic_getxattr,
	405	.listxattr = f2fs_listxattr,
	406	.removexattr = generic_removexattr,
	407	#endif
	408	};
	409
	410	static void fill_zero(struct inode *inode, pgoff_t index,
	411	loff_t start, loff_t len)
	412	{
bd43df02	413	struct f2fs_sb_info *sbi = F2FS_SB(inode->i_sb);
fbfa2cc5	414	struct page *page;
39936837	415	int ilock;
fbfa2cc5 JK	416
	417	if (!len)
	418	return;
	419
bd43df02 JK	420	f2fs_balance_fs(sbi);
bd43df02 JK	421
39936837	422	ilock = mutex_lock_op(sbi);
64aa7ed9	423	page = get_new_data_page(inode, NULL, index, false);
39936837	424	mutex_unlock_op(sbi, ilock);
fbfa2cc5 JK	425
	426	if (!IS_ERR(page)) {
	427	wait_on_page_writeback(page);
	428	zero_user(page, start, len);
	429	set_page_dirty(page);
	430	f2fs_put_page(page, 1);
	431	}
	432	}
	433
	434	int truncate_hole(struct inode *inode, pgoff_t pg_start, pgoff_t pg_end)
	435	{
	436	pgoff_t index;
	437	int err;
	438
	439	for (index = pg_start; index < pg_end; index++) {
	440	struct dnode_of_data dn;
9eaeba70	441
fbfa2cc5	442	set_new_dnode(&dn, inode, NULL, NULL, 0);
266e97a8	443	err = get_dnode_of_data(&dn, index, LOOKUP_NODE);
fbfa2cc5	444	if (err) {
fbfa2cc5 JK	445	if (err == -ENOENT)
	446	continue;
	447	return err;
	448	}
	449
	450	if (dn.data_blkaddr != NULL_ADDR)
	451	truncate_data_blocks_range(&dn, 1);
	452	f2fs_put_dnode(&dn);
fbfa2cc5 JK	453	}
	454	return 0;
	455	}
	456
	457	static int punch_hole(struct inode *inode, loff_t offset, loff_t len, int mode)
	458	{
	459	pgoff_t pg_start, pg_end;
	460	loff_t off_start, off_end;
	461	int ret = 0;
	462
	463	pg_start = ((unsigned long long) offset) >> PAGE_CACHE_SHIFT;
	464	pg_end = ((unsigned long long) offset + len) >> PAGE_CACHE_SHIFT;
	465
	466	off_start = offset & (PAGE_CACHE_SIZE - 1);
	467	off_end = (offset + len) & (PAGE_CACHE_SIZE - 1);
	468
	469	if (pg_start == pg_end) {
	470	fill_zero(inode, pg_start, off_start,
	471	off_end - off_start);
	472	} else {
	473	if (off_start)
	474	fill_zero(inode, pg_start++, off_start,
	475	PAGE_CACHE_SIZE - off_start);
	476	if (off_end)
	477	fill_zero(inode, pg_end, 0, off_end);
	478
	479	if (pg_start < pg_end) {
	480	struct address_space *mapping = inode->i_mapping;
	481	loff_t blk_start, blk_end;
1127a3d4	482	struct f2fs_sb_info *sbi = F2FS_SB(inode->i_sb);
39936837	483	int ilock;
1127a3d4 JH	484
1127a3d4 JH	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 JK	491
39936837 JK	492	ilock = mutex_lock_op(sbi);
fbfa2cc5	493	ret = truncate_hole(inode, pg_start, pg_end);
39936837	494	mutex_unlock_op(sbi, ilock);
fbfa2cc5 JK	495	}
	496	}
	497
	498	if (!(mode & FALLOC_FL_KEEP_SIZE) &&
	499	i_size_read(inode) <= (offset + len)) {
	500	i_size_write(inode, offset);
	501	mark_inode_dirty(inode);
	502	}
	503
	504	return ret;
	505	}
	506
	507	static int expand_inode_data(struct inode *inode, loff_t offset,
	508	loff_t len, int mode)
	509	{
	510	struct f2fs_sb_info *sbi = F2FS_SB(inode->i_sb);
	511	pgoff_t index, pg_start, pg_end;
	512	loff_t new_size = i_size_read(inode);
	513	loff_t off_start, off_end;
	514	int ret = 0;
	515
	516	ret = inode_newsize_ok(inode, (len + offset));
	517	if (ret)
	518	return ret;
	519
	520	pg_start = ((unsigned long long) offset) >> PAGE_CACHE_SHIFT;
	521	pg_end = ((unsigned long long) offset + len) >> PAGE_CACHE_SHIFT;
	522
	523	off_start = offset & (PAGE_CACHE_SIZE - 1);
	524	off_end = (offset + len) & (PAGE_CACHE_SIZE - 1);
	525
	526	for (index = pg_start; index <= pg_end; index++) {
	527	struct dnode_of_data dn;
39936837	528	int ilock;
fbfa2cc5	529
39936837	530	ilock = mutex_lock_op(sbi);
fbfa2cc5	531	set_new_dnode(&dn, inode, NULL, NULL, 0);
266e97a8	532	ret = get_dnode_of_data(&dn, index, ALLOC_NODE);
fbfa2cc5	533	if (ret) {
39936837	534	mutex_unlock_op(sbi, ilock);
fbfa2cc5 JK	535	break;
	536	}
	537
	538	if (dn.data_blkaddr == NULL_ADDR) {
	539	ret = reserve_new_block(&dn);
	540	if (ret) {
	541	f2fs_put_dnode(&dn);
39936837	542	mutex_unlock_op(sbi, ilock);
fbfa2cc5 JK	543	break;
	544	}
	545	}
	546	f2fs_put_dnode(&dn);
39936837	547	mutex_unlock_op(sbi, ilock);
fbfa2cc5 JK	548
	549	if (pg_start == pg_end)
	550	new_size = offset + len;
	551	else if (index == pg_start && off_start)
	552	new_size = (index + 1) << PAGE_CACHE_SHIFT;
	553	else if (index == pg_end)
	554	new_size = (index << PAGE_CACHE_SHIFT) + off_end;
	555	else
	556	new_size += PAGE_CACHE_SIZE;
	557	}
	558
	559	if (!(mode & FALLOC_FL_KEEP_SIZE) &&
	560	i_size_read(inode) < new_size) {
	561	i_size_write(inode, new_size);
	562	mark_inode_dirty(inode);
	563	}
	564
	565	return ret;
	566	}
	567
	568	static long f2fs_fallocate(struct file *file, int mode,
	569	loff_t offset, loff_t len)
	570	{
6131ffaa	571	struct inode *inode = file_inode(file);
fbfa2cc5 JK	572	long ret;
	573
	574	if (mode & ~(FALLOC_FL_KEEP_SIZE \| FALLOC_FL_PUNCH_HOLE))
	575	return -EOPNOTSUPP;
	576
	577	if (mode & FALLOC_FL_PUNCH_HOLE)
	578	ret = punch_hole(inode, offset, len, mode);
	579	else
	580	ret = expand_inode_data(inode, offset, len, mode);
	581
3af60a49 NJ	582	if (!ret) {
	583	inode->i_mtime = inode->i_ctime = CURRENT_TIME;
	584	mark_inode_dirty(inode);
	585	}
c01e2853	586	trace_f2fs_fallocate(inode, mode, offset, len, ret);
fbfa2cc5 JK	587	return ret;
	588	}
	589
	590	#define F2FS_REG_FLMASK (~(FS_DIRSYNC_FL \| FS_TOPDIR_FL))
	591	#define F2FS_OTHER_FLMASK (FS_NODUMP_FL \| FS_NOATIME_FL)
	592
	593	static inline __u32 f2fs_mask_flags(umode_t mode, __u32 flags)
	594	{
	595	if (S_ISDIR(mode))
	596	return flags;
	597	else if (S_ISREG(mode))
	598	return flags & F2FS_REG_FLMASK;
	599	else
	600	return flags & F2FS_OTHER_FLMASK;
	601	}
	602
	603	long f2fs_ioctl(struct file *filp, unsigned int cmd, unsigned long arg)
	604	{
6131ffaa	605	struct inode *inode = file_inode(filp);
fbfa2cc5 JK	606	struct f2fs_inode_info *fi = F2FS_I(inode);
	607	unsigned int flags;
	608	int ret;
	609
	610	switch (cmd) {
6a3e8ef0	611	case F2FS_IOC_GETFLAGS:
fbfa2cc5 JK	612	flags = fi->i_flags & FS_FL_USER_VISIBLE;
fbfa2cc5 JK	613	return put_user(flags, (int __user *) arg);
6a3e8ef0	614	case F2FS_IOC_SETFLAGS:
fbfa2cc5 JK	615	{
	616	unsigned int oldflags;
	617
bdaec334	618	ret = mnt_want_write_file(filp);
fbfa2cc5 JK	619	if (ret)
	620	return ret;
	621
	622	if (!inode_owner_or_capable(inode)) {
	623	ret = -EACCES;
	624	goto out;
	625	}
	626
	627	if (get_user(flags, (int __user *) arg)) {
	628	ret = -EFAULT;
	629	goto out;
	630	}
	631
	632	flags = f2fs_mask_flags(inode->i_mode, flags);
	633
	634	mutex_lock(&inode->i_mutex);
	635
	636	oldflags = fi->i_flags;
	637
	638	if ((flags ^ oldflags) & (FS_APPEND_FL \| FS_IMMUTABLE_FL)) {
	639	if (!capable(CAP_LINUX_IMMUTABLE)) {
	640	mutex_unlock(&inode->i_mutex);
	641	ret = -EPERM;
	642	goto out;
	643	}
	644	}
	645
	646	flags = flags & FS_FL_USER_MODIFIABLE;
	647	flags \|= oldflags & ~FS_FL_USER_MODIFIABLE;
	648	fi->i_flags = flags;
	649	mutex_unlock(&inode->i_mutex);
	650
	651	f2fs_set_inode_flags(inode);
	652	inode->i_ctime = CURRENT_TIME;
	653	mark_inode_dirty(inode);
	654	out:
bdaec334	655	mnt_drop_write_file(filp);
fbfa2cc5 JK	656	return ret;
	657	}
	658	default:
	659	return -ENOTTY;
	660	}
	661	}
	662
e9750824 NJ	663	#ifdef CONFIG_COMPAT
	664	long f2fs_compat_ioctl(struct file *file, unsigned int cmd, unsigned long arg)
	665	{
	666	switch (cmd) {
	667	case F2FS_IOC32_GETFLAGS:
	668	cmd = F2FS_IOC_GETFLAGS;
	669	break;
	670	case F2FS_IOC32_SETFLAGS:
	671	cmd = F2FS_IOC_SETFLAGS;
	672	break;
	673	default:
	674	return -ENOIOCTLCMD;
	675	}
	676	return f2fs_ioctl(file, cmd, (unsigned long) compat_ptr(arg));
	677	}
	678	#endif
	679
fbfa2cc5 JK	680	const struct file_operations f2fs_file_operations = {
	681	.llseek = generic_file_llseek,
	682	.read = do_sync_read,
	683	.write = do_sync_write,
	684	.aio_read = generic_file_aio_read,
	685	.aio_write = generic_file_aio_write,
	686	.open = generic_file_open,
	687	.mmap = f2fs_file_mmap,
	688	.fsync = f2fs_sync_file,
	689	.fallocate = f2fs_fallocate,
	690	.unlocked_ioctl = f2fs_ioctl,
e9750824 NJ	691	#ifdef CONFIG_COMPAT
	692	.compat_ioctl = f2fs_compat_ioctl,
	693	#endif
fbfa2cc5 JK	694	.splice_read = generic_file_splice_read,
	695	.splice_write = generic_file_splice_write,
	696	};