[linux.git] / fs / ext2 / file.c

// SPDX-License-Identifier: GPL-2.0
/*
 *  linux/fs/ext2/file.c
 *
 * Copyright (C) 1992, 1993, 1994, 1995
 * Remy Card ([email protected])
 * Laboratoire MASI - Institut Blaise Pascal
 * Universite Pierre et Marie Curie (Paris VI)
 *
 *  from
 *
 *  linux/fs/minix/file.c
 *
 *  Copyright (C) 1991, 1992  Linus Torvalds
 *
 *  ext2 fs regular file handling primitives
 *
 *  64-bit file support on 64-bit platforms by Jakub Jelinek
 * 	([email protected])
 */

#include <linux/time.h>
#include <linux/pagemap.h>
#include <linux/dax.h>
#include <linux/quotaops.h>
#include <linux/iomap.h>
#include <linux/uio.h>
#include <linux/buffer_head.h>
#include "ext2.h"
#include "xattr.h"
#include "acl.h"
#include "trace.h"

#ifdef CONFIG_FS_DAX
static ssize_t ext2_dax_read_iter(struct kiocb *iocb, struct iov_iter *to)
{
	struct inode *inode = iocb->ki_filp->f_mapping->host;
	ssize_t ret;

	if (!iov_iter_count(to))
		return 0; /* skip atime */

	inode_lock_shared(inode);
	ret = dax_iomap_rw(iocb, to, &ext2_iomap_ops);
	inode_unlock_shared(inode);

	file_accessed(iocb->ki_filp);
	return ret;
}

static ssize_t ext2_dax_write_iter(struct kiocb *iocb, struct iov_iter *from)
{
	struct file *file = iocb->ki_filp;
	struct inode *inode = file->f_mapping->host;
	ssize_t ret;

	inode_lock(inode);
	ret = generic_write_checks(iocb, from);
	if (ret <= 0)
		goto out_unlock;
	ret = file_remove_privs(file);
	if (ret)
		goto out_unlock;
	ret = file_update_time(file);
	if (ret)
		goto out_unlock;

	ret = dax_iomap_rw(iocb, from, &ext2_iomap_ops);
	if (ret > 0 && iocb->ki_pos > i_size_read(inode)) {
		i_size_write(inode, iocb->ki_pos);
		mark_inode_dirty(inode);
	}

out_unlock:
	inode_unlock(inode);
	if (ret > 0)
		ret = generic_write_sync(iocb, ret);
	return ret;
}

/*
 * The lock ordering for ext2 DAX fault paths is:
 *
 * mmap_lock (MM)
 *   sb_start_pagefault (vfs, freeze)
 *     address_space->invalidate_lock
 *       address_space->i_mmap_rwsem or page_lock (mutually exclusive in DAX)
 *         ext2_inode_info->truncate_mutex
 *
 * The default page_lock and i_size verification done by non-DAX fault paths
 * is sufficient because ext2 doesn't support hole punching.
 */
static vm_fault_t ext2_dax_fault(struct vm_fault *vmf)
{
	struct inode *inode = file_inode(vmf->vma->vm_file);
	vm_fault_t ret;
	bool write = (vmf->flags & FAULT_FLAG_WRITE) &&
		(vmf->vma->vm_flags & VM_SHARED);

	if (write) {
		sb_start_pagefault(inode->i_sb);
		file_update_time(vmf->vma->vm_file);
	}
	filemap_invalidate_lock_shared(inode->i_mapping);

	ret = dax_iomap_fault(vmf, 0, NULL, NULL, &ext2_iomap_ops);

	filemap_invalidate_unlock_shared(inode->i_mapping);
	if (write)
		sb_end_pagefault(inode->i_sb);
	return ret;
}

static const struct vm_operations_struct ext2_dax_vm_ops = {
	.fault		= ext2_dax_fault,
	/*
	 * .huge_fault is not supported for DAX because allocation in ext2
	 * cannot be reliably aligned to huge page sizes and so pmd faults
	 * will always fail and fail back to regular faults.
	 */
	.page_mkwrite	= ext2_dax_fault,
	.pfn_mkwrite	= ext2_dax_fault,
};

static int ext2_file_mmap(struct file *file, struct vm_area_struct *vma)
{
	if (!IS_DAX(file_inode(file)))
		return generic_file_mmap(file, vma);

	file_accessed(file);
	vma->vm_ops = &ext2_dax_vm_ops;
	return 0;
}
#else
#define ext2_file_mmap	generic_file_mmap
#endif

/*
 * Called when filp is released. This happens when all file descriptors
 * for a single struct file are closed. Note that different open() calls
 * for the same file yield different struct file structures.
 */
static int ext2_release_file (struct inode * inode, struct file * filp)
{
	if (filp->f_mode & FMODE_WRITE) {
		mutex_lock(&EXT2_I(inode)->truncate_mutex);
		ext2_discard_reservation(inode);
		mutex_unlock(&EXT2_I(inode)->truncate_mutex);
	}
	return 0;
}

int ext2_fsync(struct file *file, loff_t start, loff_t end, int datasync)
{
	int ret;
	struct super_block *sb = file->f_mapping->host->i_sb;

	ret = generic_buffers_fsync(file, start, end, datasync);
	if (ret == -EIO)
		/* We don't really know where the IO error happened... */
		ext2_error(sb, __func__,
			   "detected IO error when writing metadata buffers");
	return ret;
}

static ssize_t ext2_dio_read_iter(struct kiocb *iocb, struct iov_iter *to)
{
	struct file *file = iocb->ki_filp;
	struct inode *inode = file->f_mapping->host;
	ssize_t ret;

	trace_ext2_dio_read_begin(iocb, to, 0);
	inode_lock_shared(inode);
	ret = iomap_dio_rw(iocb, to, &ext2_iomap_ops, NULL, 0, NULL, 0);
	inode_unlock_shared(inode);
	trace_ext2_dio_read_end(iocb, to, ret);

	return ret;
}

static int ext2_dio_write_end_io(struct kiocb *iocb, ssize_t size,
				 int error, unsigned int flags)
{
	loff_t pos = iocb->ki_pos;
	struct inode *inode = file_inode(iocb->ki_filp);

	if (error)
		goto out;

	/*
	 * If we are extending the file, we have to update i_size here before
	 * page cache gets invalidated in iomap_dio_rw(). This prevents racing
	 * buffered reads from zeroing out too much from page cache pages.
	 * Note that all extending writes always happens synchronously with
	 * inode lock held by ext2_dio_write_iter(). So it is safe to update
	 * inode size here for extending file writes.
	 */
	pos += size;
	if (pos > i_size_read(inode)) {
		i_size_write(inode, pos);
		mark_inode_dirty(inode);
	}
out:
	trace_ext2_dio_write_endio(iocb, size, error);
	return error;
}

static const struct iomap_dio_ops ext2_dio_write_ops = {
	.end_io = ext2_dio_write_end_io,
};

static ssize_t ext2_dio_write_iter(struct kiocb *iocb, struct iov_iter *from)
{
	struct file *file = iocb->ki_filp;
	struct inode *inode = file->f_mapping->host;
	ssize_t ret;
	unsigned int flags = 0;
	unsigned long blocksize = inode->i_sb->s_blocksize;
	loff_t offset = iocb->ki_pos;
	loff_t count = iov_iter_count(from);
	ssize_t status = 0;

	trace_ext2_dio_write_begin(iocb, from, 0);
	inode_lock(inode);
	ret = generic_write_checks(iocb, from);
	if (ret <= 0)
		goto out_unlock;

	ret = kiocb_modified(iocb);
	if (ret)
		goto out_unlock;

	/* use IOMAP_DIO_FORCE_WAIT for unaligned or extending writes */
	if (iocb->ki_pos + iov_iter_count(from) > i_size_read(inode) ||
	   (!IS_ALIGNED(iocb->ki_pos | iov_iter_alignment(from), blocksize)))
		flags |= IOMAP_DIO_FORCE_WAIT;

	ret = iomap_dio_rw(iocb, from, &ext2_iomap_ops, &ext2_dio_write_ops,
			   flags, NULL, 0);

	/* ENOTBLK is magic return value for fallback to buffered-io */
	if (ret == -ENOTBLK)
		ret = 0;

	if (ret < 0 && ret != -EIOCBQUEUED)
		ext2_write_failed(inode->i_mapping, offset + count);

	/* handle case for partial write and for fallback to buffered write */
	if (ret >= 0 && iov_iter_count(from)) {
		loff_t pos, endbyte;
		int ret2;

		iocb->ki_flags &= ~IOCB_DIRECT;
		pos = iocb->ki_pos;
		status = generic_perform_write(iocb, from);
		if (unlikely(status < 0)) {
			ret = status;
			goto out_unlock;
		}

		ret += status;
		endbyte = pos + status - 1;
		ret2 = filemap_write_and_wait_range(inode->i_mapping, pos,
						    endbyte);
		if (!ret2)
			invalidate_mapping_pages(inode->i_mapping,
						 pos >> PAGE_SHIFT,
						 endbyte >> PAGE_SHIFT);
		if (ret > 0)
			generic_write_sync(iocb, ret);
	}

out_unlock:
	inode_unlock(inode);
	if (status)
		trace_ext2_dio_write_buff_end(iocb, from, status);
	trace_ext2_dio_write_end(iocb, from, ret);
	return ret;
}

static ssize_t ext2_file_read_iter(struct kiocb *iocb, struct iov_iter *to)
{
#ifdef CONFIG_FS_DAX
	if (IS_DAX(iocb->ki_filp->f_mapping->host))
		return ext2_dax_read_iter(iocb, to);
#endif
	if (iocb->ki_flags & IOCB_DIRECT)
		return ext2_dio_read_iter(iocb, to);

	return generic_file_read_iter(iocb, to);
}

static ssize_t ext2_file_write_iter(struct kiocb *iocb, struct iov_iter *from)
{
#ifdef CONFIG_FS_DAX
	if (IS_DAX(iocb->ki_filp->f_mapping->host))
		return ext2_dax_write_iter(iocb, from);
#endif
	if (iocb->ki_flags & IOCB_DIRECT)
		return ext2_dio_write_iter(iocb, from);

	return generic_file_write_iter(iocb, from);
}

static int ext2_file_open(struct inode *inode, struct file *filp)
{
	filp->f_mode |= FMODE_CAN_ODIRECT;
	return dquot_file_open(inode, filp);
}

const struct file_operations ext2_file_operations = {
	.llseek		= generic_file_llseek,
	.read_iter	= ext2_file_read_iter,
	.write_iter	= ext2_file_write_iter,
	.unlocked_ioctl = ext2_ioctl,
#ifdef CONFIG_COMPAT
	.compat_ioctl	= ext2_compat_ioctl,
#endif
	.mmap		= ext2_file_mmap,
	.open		= ext2_file_open,
	.release	= ext2_release_file,
	.fsync		= ext2_fsync,
	.get_unmapped_area = thp_get_unmapped_area,
	.splice_read	= filemap_splice_read,
	.splice_write	= iter_file_splice_write,
};

const struct inode_operations ext2_file_inode_operations = {
	.listxattr	= ext2_listxattr,
	.getattr	= ext2_getattr,
	.setattr	= ext2_setattr,
	.get_inode_acl	= ext2_get_acl,
	.set_acl	= ext2_set_acl,
	.fiemap		= ext2_fiemap,
	.fileattr_get	= ext2_fileattr_get,
	.fileattr_set	= ext2_fileattr_set,
};
Commit	Line	Data
b2441318	1	// SPDX-License-Identifier: GPL-2.0
1da177e4 LT	2	/*
	3	* linux/fs/ext2/file.c
	4	*
	5	* Copyright (C) 1992, 1993, 1994, 1995
	6	* Remy Card ([email protected])
	7	* Laboratoire MASI - Institut Blaise Pascal
	8	* Universite Pierre et Marie Curie (Paris VI)
	9	*
	10	* from
	11	*
	12	* linux/fs/minix/file.c
	13	*
	14	* Copyright (C) 1991, 1992 Linus Torvalds
	15	*
	16	* ext2 fs regular file handling primitives
	17	*
	18	* 64-bit file support on 64-bit platforms by Jakub Jelinek
	19	* ([email protected])
	20	*/
	21
	22	#include <linux/time.h>
48bde86d	23	#include <linux/pagemap.h>
c94c2acf	24	#include <linux/dax.h>
871a2931	25	#include <linux/quotaops.h>
25f4e702 CH	26	#include <linux/iomap.h>
25f4e702 CH	27	#include <linux/uio.h>
d0530704	28	#include <linux/buffer_head.h>
1da177e4 LT	29	#include "ext2.h"
	30	#include "xattr.h"
	31	#include "acl.h"
6e335cd7	32	#include "trace.h"
1da177e4	33
6cd176a5	34	#ifdef CONFIG_FS_DAX
25f4e702 CH	35	static ssize_t ext2_dax_read_iter(struct kiocb iocb, struct iov_iter to)
	36	{
	37	struct inode *inode = iocb->ki_filp->f_mapping->host;
	38	ssize_t ret;
	39
	40	if (!iov_iter_count(to))
	41	return 0; /* skip atime */
	42
	43	inode_lock_shared(inode);
11c59c92	44	ret = dax_iomap_rw(iocb, to, &ext2_iomap_ops);
25f4e702 CH	45	inode_unlock_shared(inode);
	46
	47	file_accessed(iocb->ki_filp);
	48	return ret;
	49	}
	50
	51	static ssize_t ext2_dax_write_iter(struct kiocb iocb, struct iov_iter from)
	52	{
	53	struct file *file = iocb->ki_filp;
	54	struct inode *inode = file->f_mapping->host;
	55	ssize_t ret;
	56
	57	inode_lock(inode);
	58	ret = generic_write_checks(iocb, from);
	59	if (ret <= 0)
	60	goto out_unlock;
	61	ret = file_remove_privs(file);
	62	if (ret)
	63	goto out_unlock;
	64	ret = file_update_time(file);
	65	if (ret)
	66	goto out_unlock;
	67
11c59c92	68	ret = dax_iomap_rw(iocb, from, &ext2_iomap_ops);
25f4e702 CH	69	if (ret > 0 && iocb->ki_pos > i_size_read(inode)) {
	70	i_size_write(inode, iocb->ki_pos);
	71	mark_inode_dirty(inode);
	72	}
	73
	74	out_unlock:
	75	inode_unlock(inode);
	76	if (ret > 0)
	77	ret = generic_write_sync(iocb, ret);
	78	return ret;
	79	}
	80
5726b27b RZ	81	/*
	82	* The lock ordering for ext2 DAX fault paths is:
	83	*
c1e8d7c6	84	* mmap_lock (MM)
5726b27b	85	* sb_start_pagefault (vfs, freeze)
70f3bad8	86	* address_space->invalidate_lock
5726b27b RZ	87	* address_space->i_mmap_rwsem or page_lock (mutually exclusive in DAX)
	88	* ext2_inode_info->truncate_mutex
	89	*
	90	* The default page_lock and i_size verification done by non-DAX fault paths
	91	* is sufficient because ext2 doesn't support hole punching.
	92	*/
06856938	93	static vm_fault_t ext2_dax_fault(struct vm_fault *vmf)
f7ca90b1	94	{
11bac800	95	struct inode *inode = file_inode(vmf->vma->vm_file);
06856938	96	vm_fault_t ret;
1ef6ea0e MP	97	bool write = (vmf->flags & FAULT_FLAG_WRITE) &&
1ef6ea0e MP	98	(vmf->vma->vm_flags & VM_SHARED);
5726b27b	99
1ef6ea0e	100	if (write) {
5726b27b	101	sb_start_pagefault(inode->i_sb);
11bac800	102	file_update_time(vmf->vma->vm_file);
5726b27b	103	}
70f3bad8	104	filemap_invalidate_lock_shared(inode->i_mapping);
5726b27b	105
1d024e7a	106	ret = dax_iomap_fault(vmf, 0, NULL, NULL, &ext2_iomap_ops);
5726b27b	107
70f3bad8	108	filemap_invalidate_unlock_shared(inode->i_mapping);
1ef6ea0e	109	if (write)
5726b27b RZ	110	sb_end_pagefault(inode->i_sb);
5726b27b RZ	111	return ret;
f7ca90b1 MW	112	}
f7ca90b1 MW	113
f7ca90b1 MW	114	static const struct vm_operations_struct ext2_dax_vm_ops = {
f7ca90b1 MW	115	.fault = ext2_dax_fault,
03e0990f	116	/*
a2d58167	117	* .huge_fault is not supported for DAX because allocation in ext2
03e0990f RZ	118	* cannot be reliably aligned to huge page sizes and so pmd faults
	119	* will always fail and fail back to regular faults.
	120	*/
1e9d180b	121	.page_mkwrite = ext2_dax_fault,
91d25ba8	122	.pfn_mkwrite = ext2_dax_fault,
f7ca90b1 MW	123	};
	124
	125	static int ext2_file_mmap(struct file file, struct vm_area_struct vma)
	126	{
	127	if (!IS_DAX(file_inode(file)))
	128	return generic_file_mmap(file, vma);
	129
	130	file_accessed(file);
	131	vma->vm_ops = &ext2_dax_vm_ops;
f7ca90b1 MW	132	return 0;
	133	}
	134	#else
	135	#define ext2_file_mmap generic_file_mmap
	136	#endif
	137
1da177e4	138	/*
a6739af8 JK	139	* Called when filp is released. This happens when all file descriptors
	140	* for a single struct file are closed. Note that different open() calls
	141	* for the same file yield different struct file structures.
1da177e4 LT	142	*/
	143	static int ext2_release_file (struct inode * inode, struct file * filp)
	144	{
a686cd89 MB	145	if (filp->f_mode & FMODE_WRITE) {
	146	mutex_lock(&EXT2_I(inode)->truncate_mutex);
	147	ext2_discard_reservation(inode);
	148	mutex_unlock(&EXT2_I(inode)->truncate_mutex);
	149	}
1da177e4 LT	150	return 0;
	151	}
	152
02c24a82	153	int ext2_fsync(struct file *file, loff_t start, loff_t end, int datasync)
48bde86d JK	154	{
48bde86d JK	155	int ret;
7ea80859	156	struct super_block *sb = file->f_mapping->host->i_sb;
48bde86d	157
d0530704	158	ret = generic_buffers_fsync(file, start, end, datasync);
dac257f7	159	if (ret == -EIO)
48bde86d JK	160	/* We don't really know where the IO error happened... */
	161	ext2_error(sb, __func__,
	162	"detected IO error when writing metadata buffers");
48bde86d JK	163	return ret;
	164	}
	165
fb5de435 RHI	166	static ssize_t ext2_dio_read_iter(struct kiocb iocb, struct iov_iter to)
	167	{
	168	struct file *file = iocb->ki_filp;
	169	struct inode *inode = file->f_mapping->host;
	170	ssize_t ret;
	171
6e335cd7	172	trace_ext2_dio_read_begin(iocb, to, 0);
fb5de435 RHI	173	inode_lock_shared(inode);
	174	ret = iomap_dio_rw(iocb, to, &ext2_iomap_ops, NULL, 0, NULL, 0);
	175	inode_unlock_shared(inode);
6e335cd7	176	trace_ext2_dio_read_end(iocb, to, ret);
fb5de435 RHI	177
	178	return ret;
	179	}
	180
	181	static int ext2_dio_write_end_io(struct kiocb *iocb, ssize_t size,
	182	int error, unsigned int flags)
	183	{
	184	loff_t pos = iocb->ki_pos;
	185	struct inode *inode = file_inode(iocb->ki_filp);
	186
	187	if (error)
	188	goto out;
	189
	190	/*
	191	* If we are extending the file, we have to update i_size here before
	192	* page cache gets invalidated in iomap_dio_rw(). This prevents racing
	193	* buffered reads from zeroing out too much from page cache pages.
	194	* Note that all extending writes always happens synchronously with
	195	* inode lock held by ext2_dio_write_iter(). So it is safe to update
	196	* inode size here for extending file writes.
	197	*/
	198	pos += size;
	199	if (pos > i_size_read(inode)) {
	200	i_size_write(inode, pos);
	201	mark_inode_dirty(inode);
	202	}
	203	out:
6e335cd7	204	trace_ext2_dio_write_endio(iocb, size, error);
fb5de435 RHI	205	return error;
	206	}
	207
	208	static const struct iomap_dio_ops ext2_dio_write_ops = {
	209	.end_io = ext2_dio_write_end_io,
	210	};
	211
	212	static ssize_t ext2_dio_write_iter(struct kiocb iocb, struct iov_iter from)
	213	{
	214	struct file *file = iocb->ki_filp;
	215	struct inode *inode = file->f_mapping->host;
	216	ssize_t ret;
	217	unsigned int flags = 0;
	218	unsigned long blocksize = inode->i_sb->s_blocksize;
	219	loff_t offset = iocb->ki_pos;
	220	loff_t count = iov_iter_count(from);
6e335cd7	221	ssize_t status = 0;
fb5de435	222
6e335cd7	223	trace_ext2_dio_write_begin(iocb, from, 0);
fb5de435 RHI	224	inode_lock(inode);
	225	ret = generic_write_checks(iocb, from);
	226	if (ret <= 0)
	227	goto out_unlock;
	228
	229	ret = kiocb_modified(iocb);
	230	if (ret)
	231	goto out_unlock;
	232
	233	/* use IOMAP_DIO_FORCE_WAIT for unaligned or extending writes */
	234	if (iocb->ki_pos + iov_iter_count(from) > i_size_read(inode) \|\|
	235	(!IS_ALIGNED(iocb->ki_pos \| iov_iter_alignment(from), blocksize)))
	236	flags \|= IOMAP_DIO_FORCE_WAIT;
	237
	238	ret = iomap_dio_rw(iocb, from, &ext2_iomap_ops, &ext2_dio_write_ops,
	239	flags, NULL, 0);
	240
	241	/* ENOTBLK is magic return value for fallback to buffered-io */
	242	if (ret == -ENOTBLK)
	243	ret = 0;
	244
	245	if (ret < 0 && ret != -EIOCBQUEUED)
	246	ext2_write_failed(inode->i_mapping, offset + count);
	247
	248	/* handle case for partial write and for fallback to buffered write */
	249	if (ret >= 0 && iov_iter_count(from)) {
	250	loff_t pos, endbyte;
fb5de435 RHI	251	int ret2;
	252
	253	iocb->ki_flags &= ~IOCB_DIRECT;
	254	pos = iocb->ki_pos;
	255	status = generic_perform_write(iocb, from);
	256	if (unlikely(status < 0)) {
	257	ret = status;
	258	goto out_unlock;
	259	}
	260
fb5de435 RHI	261	ret += status;
	262	endbyte = pos + status - 1;
	263	ret2 = filemap_write_and_wait_range(inode->i_mapping, pos,
	264	endbyte);
	265	if (!ret2)
	266	invalidate_mapping_pages(inode->i_mapping,
	267	pos >> PAGE_SHIFT,
	268	endbyte >> PAGE_SHIFT);
	269	if (ret > 0)
	270	generic_write_sync(iocb, ret);
	271	}
	272
	273	out_unlock:
	274	inode_unlock(inode);
6e335cd7 RHI	275	if (status)
	276	trace_ext2_dio_write_buff_end(iocb, from, status);
	277	trace_ext2_dio_write_end(iocb, from, ret);
fb5de435 RHI	278	return ret;
	279	}
	280
25f4e702 CH	281	static ssize_t ext2_file_read_iter(struct kiocb iocb, struct iov_iter to)
	282	{
	283	#ifdef CONFIG_FS_DAX
	284	if (IS_DAX(iocb->ki_filp->f_mapping->host))
	285	return ext2_dax_read_iter(iocb, to);
	286	#endif
fb5de435 RHI	287	if (iocb->ki_flags & IOCB_DIRECT)
	288	return ext2_dio_read_iter(iocb, to);
	289
25f4e702 CH	290	return generic_file_read_iter(iocb, to);
	291	}
	292
	293	static ssize_t ext2_file_write_iter(struct kiocb iocb, struct iov_iter from)
	294	{
	295	#ifdef CONFIG_FS_DAX
	296	if (IS_DAX(iocb->ki_filp->f_mapping->host))
	297	return ext2_dax_write_iter(iocb, from);
	298	#endif
fb5de435 RHI	299	if (iocb->ki_flags & IOCB_DIRECT)
	300	return ext2_dio_write_iter(iocb, from);
	301
25f4e702 CH	302	return generic_file_write_iter(iocb, from);
	303	}
	304
3e90417f RHI	305	static int ext2_file_open(struct inode inode, struct file filp)
	306	{
	307	filp->f_mode \|= FMODE_CAN_ODIRECT;
	308	return dquot_file_open(inode, filp);
	309	}
	310
4b6f5d20	311	const struct file_operations ext2_file_operations = {
1da177e4	312	.llseek = generic_file_llseek,
25f4e702 CH	313	.read_iter = ext2_file_read_iter,
25f4e702 CH	314	.write_iter = ext2_file_write_iter,
14f9f7b2	315	.unlocked_ioctl = ext2_ioctl,
e322ff07 DH	316	#ifdef CONFIG_COMPAT
	317	.compat_ioctl = ext2_compat_ioctl,
	318	#endif
f7ca90b1	319	.mmap = ext2_file_mmap,
3e90417f	320	.open = ext2_file_open,
1da177e4	321	.release = ext2_release_file,
48bde86d	322	.fsync = ext2_fsync,
dbe6ec81	323	.get_unmapped_area = thp_get_unmapped_area,
2cb1e089	324	.splice_read = filemap_splice_read,
8d020765	325	.splice_write = iter_file_splice_write,
1da177e4 LT	326	};
1da177e4 LT	327
754661f1	328	const struct inode_operations ext2_file_inode_operations = {
1da177e4	329	.listxattr = ext2_listxattr,
93bc420e	330	.getattr = ext2_getattr,
1da177e4	331	.setattr = ext2_setattr,
cac2f8b8	332	.get_inode_acl = ext2_get_acl,
64e178a7	333	.set_acl = ext2_set_acl,
68c9d702	334	.fiemap = ext2_fiemap,
aba405e3 MS	335	.fileattr_get = ext2_fileattr_get,
aba405e3 MS	336	.fileattr_set = ext2_fileattr_set,
1da177e4	337	};