[linux-block.git] / drivers / dma-buf / sync_file.c

// SPDX-License-Identifier: GPL-2.0-only
/*
 * drivers/dma-buf/sync_file.c
 *
 * Copyright (C) 2012 Google, Inc.
 */

#include <linux/dma-fence-unwrap.h>
#include <linux/export.h>
#include <linux/file.h>
#include <linux/fs.h>
#include <linux/kernel.h>
#include <linux/poll.h>
#include <linux/sched.h>
#include <linux/slab.h>
#include <linux/uaccess.h>
#include <linux/anon_inodes.h>
#include <linux/sync_file.h>
#include <uapi/linux/sync_file.h>

static const struct file_operations sync_file_fops;

static struct sync_file *sync_file_alloc(void)
{
	struct sync_file *sync_file;

	sync_file = kzalloc(sizeof(*sync_file), GFP_KERNEL);
	if (!sync_file)
		return NULL;

	sync_file->file = anon_inode_getfile("sync_file", &sync_file_fops,
					     sync_file, 0);
	if (IS_ERR(sync_file->file))
		goto err;

	init_waitqueue_head(&sync_file->wq);

	INIT_LIST_HEAD(&sync_file->cb.node);

	return sync_file;

err:
	kfree(sync_file);
	return NULL;
}

static void fence_check_cb_func(struct dma_fence *f, struct dma_fence_cb *cb)
{
	struct sync_file *sync_file;

	sync_file = container_of(cb, struct sync_file, cb);

	wake_up_all(&sync_file->wq);
}

/**
 * sync_file_create() - creates a sync file
 * @fence:	fence to add to the sync_fence
 *
 * Creates a sync_file containg @fence. This function acquires and additional
 * reference of @fence for the newly-created &sync_file, if it succeeds. The
 * sync_file can be released with fput(sync_file->file). Returns the
 * sync_file or NULL in case of error.
 */
struct sync_file *sync_file_create(struct dma_fence *fence)
{
	struct sync_file *sync_file;

	sync_file = sync_file_alloc();
	if (!sync_file)
		return NULL;

	sync_file->fence = dma_fence_get(fence);

	return sync_file;
}
EXPORT_SYMBOL(sync_file_create);

static struct sync_file *sync_file_fdget(int fd)
{
	struct file *file = fget(fd);

	if (!file)
		return NULL;

	if (file->f_op != &sync_file_fops)
		goto err;

	return file->private_data;

err:
	fput(file);
	return NULL;
}

/**
 * sync_file_get_fence - get the fence related to the sync_file fd
 * @fd:		sync_file fd to get the fence from
 *
 * Ensures @fd references a valid sync_file and returns a fence that
 * represents all fence in the sync_file. On error NULL is returned.
 */
struct dma_fence *sync_file_get_fence(int fd)
{
	struct sync_file *sync_file;
	struct dma_fence *fence;

	sync_file = sync_file_fdget(fd);
	if (!sync_file)
		return NULL;

	fence = dma_fence_get(sync_file->fence);
	fput(sync_file->file);

	return fence;
}
EXPORT_SYMBOL(sync_file_get_fence);

/**
 * sync_file_get_name - get the name of the sync_file
 * @sync_file:		sync_file to get the fence from
 * @buf:		destination buffer to copy sync_file name into
 * @len:		available size of destination buffer.
 *
 * Each sync_file may have a name assigned either by the user (when merging
 * sync_files together) or created from the fence it contains. In the latter
 * case construction of the name is deferred until use, and so requires
 * sync_file_get_name().
 *
 * Returns: a string representing the name.
 */
char *sync_file_get_name(struct sync_file *sync_file, char *buf, int len)
{
	if (sync_file->user_name[0]) {
		strscpy(buf, sync_file->user_name, len);
	} else {
		struct dma_fence *fence = sync_file->fence;

		snprintf(buf, len, "%s-%s%llu-%lld",
			 fence->ops->get_driver_name(fence),
			 fence->ops->get_timeline_name(fence),
			 fence->context,
			 fence->seqno);
	}

	return buf;
}

/**
 * sync_file_merge() - merge two sync_files
 * @name:	name of new fence
 * @a:		sync_file a
 * @b:		sync_file b
 *
 * Creates a new sync_file which contains copies of all the fences in both
 * @a and @b.  @a and @b remain valid, independent sync_file. Returns the
 * new merged sync_file or NULL in case of error.
 */
static struct sync_file *sync_file_merge(const char *name, struct sync_file *a,
					 struct sync_file *b)
{
	struct sync_file *sync_file;
	struct dma_fence *fence;

	sync_file = sync_file_alloc();
	if (!sync_file)
		return NULL;

	fence = dma_fence_unwrap_merge(a->fence, b->fence);
	if (!fence) {
		fput(sync_file->file);
		return NULL;
	}
	sync_file->fence = fence;
	strscpy(sync_file->user_name, name, sizeof(sync_file->user_name));
	return sync_file;
}

static int sync_file_release(struct inode *inode, struct file *file)
{
	struct sync_file *sync_file = file->private_data;

	if (test_bit(POLL_ENABLED, &sync_file->flags))
		dma_fence_remove_callback(sync_file->fence, &sync_file->cb);
	dma_fence_put(sync_file->fence);
	kfree(sync_file);

	return 0;
}

static __poll_t sync_file_poll(struct file *file, poll_table *wait)
{
	struct sync_file *sync_file = file->private_data;

	poll_wait(file, &sync_file->wq, wait);

	if (list_empty(&sync_file->cb.node) &&
	    !test_and_set_bit(POLL_ENABLED, &sync_file->flags)) {
		if (dma_fence_add_callback(sync_file->fence, &sync_file->cb,
					   fence_check_cb_func) < 0)
			wake_up_all(&sync_file->wq);
	}

	return dma_fence_is_signaled(sync_file->fence) ? EPOLLIN : 0;
}

static long sync_file_ioctl_merge(struct sync_file *sync_file,
				  unsigned long arg)
{
	int fd = get_unused_fd_flags(O_CLOEXEC);
	int err;
	struct sync_file *fence2, *fence3;
	struct sync_merge_data data;

	if (fd < 0)
		return fd;

	if (copy_from_user(&data, (void __user *)arg, sizeof(data))) {
		err = -EFAULT;
		goto err_put_fd;
	}

	if (data.flags || data.pad) {
		err = -EINVAL;
		goto err_put_fd;
	}

	fence2 = sync_file_fdget(data.fd2);
	if (!fence2) {
		err = -ENOENT;
		goto err_put_fd;
	}

	data.name[sizeof(data.name) - 1] = '\0';
	fence3 = sync_file_merge(data.name, sync_file, fence2);
	if (!fence3) {
		err = -ENOMEM;
		goto err_put_fence2;
	}

	data.fence = fd;
	if (copy_to_user((void __user *)arg, &data, sizeof(data))) {
		err = -EFAULT;
		goto err_put_fence3;
	}

	fd_install(fd, fence3->file);
	fput(fence2->file);
	return 0;

err_put_fence3:
	fput(fence3->file);

err_put_fence2:
	fput(fence2->file);

err_put_fd:
	put_unused_fd(fd);
	return err;
}

static int sync_fill_fence_info(struct dma_fence *fence,
				 struct sync_fence_info *info)
{
	strscpy(info->obj_name, fence->ops->get_timeline_name(fence),
		sizeof(info->obj_name));
	strscpy(info->driver_name, fence->ops->get_driver_name(fence),
		sizeof(info->driver_name));

	info->status = dma_fence_get_status(fence);
	while (test_bit(DMA_FENCE_FLAG_SIGNALED_BIT, &fence->flags) &&
	       !test_bit(DMA_FENCE_FLAG_TIMESTAMP_BIT, &fence->flags))
		cpu_relax();
	info->timestamp_ns =
		test_bit(DMA_FENCE_FLAG_TIMESTAMP_BIT, &fence->flags) ?
		ktime_to_ns(fence->timestamp) :
		ktime_set(0, 0);

	return info->status;
}

static long sync_file_ioctl_fence_info(struct sync_file *sync_file,
				       unsigned long arg)
{
	struct sync_fence_info *fence_info = NULL;
	struct dma_fence_unwrap iter;
	struct sync_file_info info;
	unsigned int num_fences;
	struct dma_fence *fence;
	int ret;
	__u32 size;

	if (copy_from_user(&info, (void __user *)arg, sizeof(info)))
		return -EFAULT;

	if (info.flags || info.pad)
		return -EINVAL;

	num_fences = 0;
	dma_fence_unwrap_for_each(fence, &iter, sync_file->fence)
		++num_fences;

	/*
	 * Passing num_fences = 0 means that userspace doesn't want to
	 * retrieve any sync_fence_info. If num_fences = 0 we skip filling
	 * sync_fence_info and return the actual number of fences on
	 * info->num_fences.
	 */
	if (!info.num_fences) {
		info.status = dma_fence_get_status(sync_file->fence);
		goto no_fences;
	} else {
		info.status = 1;
	}

	if (info.num_fences < num_fences)
		return -EINVAL;

	size = num_fences * sizeof(*fence_info);
	fence_info = kzalloc(size, GFP_KERNEL);
	if (!fence_info)
		return -ENOMEM;

	num_fences = 0;
	dma_fence_unwrap_for_each(fence, &iter, sync_file->fence) {
		int status;

		status = sync_fill_fence_info(fence, &fence_info[num_fences++]);
		info.status = info.status <= 0 ? info.status : status;
	}

	if (copy_to_user(u64_to_user_ptr(info.sync_fence_info), fence_info,
			 size)) {
		ret = -EFAULT;
		goto out;
	}

no_fences:
	sync_file_get_name(sync_file, info.name, sizeof(info.name));
	info.num_fences = num_fences;

	if (copy_to_user((void __user *)arg, &info, sizeof(info)))
		ret = -EFAULT;
	else
		ret = 0;

out:
	kfree(fence_info);

	return ret;
}

static long sync_file_ioctl(struct file *file, unsigned int cmd,
			    unsigned long arg)
{
	struct sync_file *sync_file = file->private_data;

	switch (cmd) {
	case SYNC_IOC_MERGE:
		return sync_file_ioctl_merge(sync_file, arg);

	case SYNC_IOC_FILE_INFO:
		return sync_file_ioctl_fence_info(sync_file, arg);

	default:
		return -ENOTTY;
	}
}

static const struct file_operations sync_file_fops = {
	.release = sync_file_release,
	.poll = sync_file_poll,
	.unlocked_ioctl = sync_file_ioctl,
	.compat_ioctl = compat_ptr_ioctl,
};
Commit	Line	Data
9c92ab61	1	// SPDX-License-Identifier: GPL-2.0-only
d4cab38e GP	2	/*
	3	* drivers/dma-buf/sync_file.c
	4	*
	5	* Copyright (C) 2012 Google, Inc.
d4cab38e GP	6	*/
d4cab38e GP	7
519f490d	8	#include <linux/dma-fence-unwrap.h>
d4cab38e GP	9	#include <linux/export.h>
	10	#include <linux/file.h>
	11	#include <linux/fs.h>
	12	#include <linux/kernel.h>
	13	#include <linux/poll.h>
	14	#include <linux/sched.h>
	15	#include <linux/slab.h>
	16	#include <linux/uaccess.h>
	17	#include <linux/anon_inodes.h>
460bfc41 GP	18	#include <linux/sync_file.h>
460bfc41 GP	19	#include <uapi/linux/sync_file.h>
d4cab38e GP	20
	21	static const struct file_operations sync_file_fops;
	22
a02b9dc9	23	static struct sync_file *sync_file_alloc(void)
d4cab38e GP	24	{
	25	struct sync_file *sync_file;
	26
a02b9dc9	27	sync_file = kzalloc(sizeof(*sync_file), GFP_KERNEL);
d4cab38e GP	28	if (!sync_file)
	29	return NULL;
	30
	31	sync_file->file = anon_inode_getfile("sync_file", &sync_file_fops,
	32	sync_file, 0);
	33	if (IS_ERR(sync_file->file))
	34	goto err;
	35
d4cab38e GP	36	init_waitqueue_head(&sync_file->wq);
d4cab38e GP	37
a02b9dc9 GP	38	INIT_LIST_HEAD(&sync_file->cb.node);
a02b9dc9 GP	39
d4cab38e GP	40	return sync_file;
	41
	42	err:
	43	kfree(sync_file);
	44	return NULL;
	45	}
	46
f54d1867	47	static void fence_check_cb_func(struct dma_fence f, struct dma_fence_cb cb)
d4cab38e	48	{
d4cab38e GP	49	struct sync_file *sync_file;
d4cab38e GP	50
a02b9dc9	51	sync_file = container_of(cb, struct sync_file, cb);
d4cab38e	52
a02b9dc9	53	wake_up_all(&sync_file->wq);
d4cab38e GP	54	}
	55
	56	/**
c240a714	57	* sync_file_create() - creates a sync file
d4cab38e GP	58	* @fence: fence to add to the sync_fence
d4cab38e GP	59	*
24a36734 DV	60	* Creates a sync_file containg @fence. This function acquires and additional
	61	* reference of @fence for the newly-created &sync_file, if it succeeds. The
	62	* sync_file can be released with fput(sync_file->file). Returns the
	63	* sync_file or NULL in case of error.
d4cab38e	64	*/
f54d1867	65	struct sync_file sync_file_create(struct dma_fence fence)
d4cab38e GP	66	{
	67	struct sync_file *sync_file;
	68
a02b9dc9	69	sync_file = sync_file_alloc();
d4cab38e GP	70	if (!sync_file)
	71	return NULL;
	72
f54d1867	73	sync_file->fence = dma_fence_get(fence);
a02b9dc9	74
d4cab38e GP	75	return sync_file;
	76	}
	77	EXPORT_SYMBOL(sync_file_create);
	78
d4cab38e GP	79	static struct sync_file *sync_file_fdget(int fd)
	80	{
	81	struct file *file = fget(fd);
	82
	83	if (!file)
	84	return NULL;
	85
	86	if (file->f_op != &sync_file_fops)
	87	goto err;
	88
	89	return file->private_data;
	90
	91	err:
	92	fput(file);
	93	return NULL;
	94	}
	95
972526a4 GP	96	/**
	97	* sync_file_get_fence - get the fence related to the sync_file fd
	98	* @fd: sync_file fd to get the fence from
	99	*
	100	* Ensures @fd references a valid sync_file and returns a fence that
	101	* represents all fence in the sync_file. On error NULL is returned.
	102	*/
f54d1867	103	struct dma_fence *sync_file_get_fence(int fd)
972526a4 GP	104	{
972526a4 GP	105	struct sync_file *sync_file;
f54d1867	106	struct dma_fence *fence;
972526a4 GP	107
	108	sync_file = sync_file_fdget(fd);
	109	if (!sync_file)
	110	return NULL;
	111
f54d1867	112	fence = dma_fence_get(sync_file->fence);
972526a4 GP	113	fput(sync_file->file);
	114
	115	return fence;
	116	}
	117	EXPORT_SYMBOL(sync_file_get_fence);
	118
71ebc9a3 CW	119	/**
	120	* sync_file_get_name - get the name of the sync_file
	121	* @sync_file: sync_file to get the fence from
	122	* @buf: destination buffer to copy sync_file name into
	123	* @len: available size of destination buffer.
	124	*
	125	* Each sync_file may have a name assigned either by the user (when merging
	126	* sync_files together) or created from the fence it contains. In the latter
	127	* case construction of the name is deferred until use, and so requires
	128	* sync_file_get_name().
	129	*
	130	* Returns: a string representing the name.
	131	*/
	132	char sync_file_get_name(struct sync_file sync_file, char *buf, int len)
	133	{
	134	if (sync_file->user_name[0]) {
bcfa6be2	135	strscpy(buf, sync_file->user_name, len);
71ebc9a3 CW	136	} else {
	137	struct dma_fence *fence = sync_file->fence;
	138
b312d8ca	139	snprintf(buf, len, "%s-%s%llu-%lld",
71ebc9a3 CW	140	fence->ops->get_driver_name(fence),
	141	fence->ops->get_timeline_name(fence),
	142	fence->context,
	143	fence->seqno);
	144	}
	145
	146	return buf;
	147	}
	148
d4cab38e GP	149	/**
	150	* sync_file_merge() - merge two sync_files
	151	* @name: name of new fence
	152	* @a: sync_file a
	153	* @b: sync_file b
	154	*
	155	* Creates a new sync_file which contains copies of all the fences in both
	156	* @a and @b. @a and @b remain valid, independent sync_file. Returns the
	157	* new merged sync_file or NULL in case of error.
	158	*/
	159	static struct sync_file sync_file_merge(const char name, struct sync_file *a,
	160	struct sync_file *b)
	161	{
d4cab38e	162	struct sync_file *sync_file;
245a4a7b	163	struct dma_fence *fence;
d4cab38e	164
a02b9dc9	165	sync_file = sync_file_alloc();
d4cab38e GP	166	if (!sync_file)
	167	return NULL;
	168
245a4a7b CK	169	fence = dma_fence_unwrap_merge(a->fence, b->fence);
	170	if (!fence) {
	171	fput(sync_file->file);
	172	return NULL;
d4cab38e	173	}
245a4a7b	174	sync_file->fence = fence;
bcfa6be2	175	strscpy(sync_file->user_name, name, sizeof(sync_file->user_name));
d4cab38e GP	176	return sync_file;
	177	}
	178
d8f2ebaa	179	static int sync_file_release(struct inode inode, struct file file)
d4cab38e	180	{
d8f2ebaa	181	struct sync_file *sync_file = file->private_data;
d4cab38e	182
99f82843	183	if (test_bit(POLL_ENABLED, &sync_file->flags))
f54d1867 CW	184	dma_fence_remove_callback(sync_file->fence, &sync_file->cb);
f54d1867 CW	185	dma_fence_put(sync_file->fence);
d4cab38e	186	kfree(sync_file);
d4cab38e	187
d4cab38e GP	188	return 0;
	189	}
	190
afc9a42b	191	static __poll_t sync_file_poll(struct file file, poll_table wait)
d4cab38e GP	192	{
d4cab38e GP	193	struct sync_file *sync_file = file->private_data;
d4cab38e GP	194
	195	poll_wait(file, &sync_file->wq, wait);
	196
99f82843 CW	197	if (list_empty(&sync_file->cb.node) &&
99f82843 CW	198	!test_and_set_bit(POLL_ENABLED, &sync_file->flags)) {
f54d1867 CW	199	if (dma_fence_add_callback(sync_file->fence, &sync_file->cb,
f54d1867 CW	200	fence_check_cb_func) < 0)
e2416553 GP	201	wake_up_all(&sync_file->wq);
e2416553 GP	202	}
d4cab38e	203
a9a08845	204	return dma_fence_is_signaled(sync_file->fence) ? EPOLLIN : 0;
d4cab38e GP	205	}
	206
	207	static long sync_file_ioctl_merge(struct sync_file *sync_file,
92e06213	208	unsigned long arg)
d4cab38e GP	209	{
	210	int fd = get_unused_fd_flags(O_CLOEXEC);
	211	int err;
	212	struct sync_file fence2, fence3;
	213	struct sync_merge_data data;
	214
	215	if (fd < 0)
	216	return fd;
	217
	218	if (copy_from_user(&data, (void __user *)arg, sizeof(data))) {
	219	err = -EFAULT;
	220	goto err_put_fd;
	221	}
	222
	223	if (data.flags \|\| data.pad) {
	224	err = -EINVAL;
	225	goto err_put_fd;
	226	}
	227
	228	fence2 = sync_file_fdget(data.fd2);
	229	if (!fence2) {
	230	err = -ENOENT;
	231	goto err_put_fd;
	232	}
	233
	234	data.name[sizeof(data.name) - 1] = '\0';
	235	fence3 = sync_file_merge(data.name, sync_file, fence2);
	236	if (!fence3) {
	237	err = -ENOMEM;
	238	goto err_put_fence2;
	239	}
	240
	241	data.fence = fd;
	242	if (copy_to_user((void __user *)arg, &data, sizeof(data))) {
	243	err = -EFAULT;
	244	goto err_put_fence3;
	245	}
	246
	247	fd_install(fd, fence3->file);
	248	fput(fence2->file);
	249	return 0;
	250
	251	err_put_fence3:
	252	fput(fence3->file);
	253
	254	err_put_fence2:
	255	fput(fence2->file);
	256
	257	err_put_fd:
	258	put_unused_fd(fd);
	259	return err;
	260	}
	261
f7974880	262	static int sync_fill_fence_info(struct dma_fence *fence,
92e06213	263	struct sync_fence_info *info)
d4cab38e	264	{
bcfa6be2	265	strscpy(info->obj_name, fence->ops->get_timeline_name(fence),
d4cab38e	266	sizeof(info->obj_name));
bcfa6be2	267	strscpy(info->driver_name, fence->ops->get_driver_name(fence),
d4cab38e	268	sizeof(info->driver_name));
d6c99f4b CW	269
d6c99f4b CW	270	info->status = dma_fence_get_status(fence);
76250f2b CW	271	while (test_bit(DMA_FENCE_FLAG_SIGNALED_BIT, &fence->flags) &&
	272	!test_bit(DMA_FENCE_FLAG_TIMESTAMP_BIT, &fence->flags))
	273	cpu_relax();
	274	info->timestamp_ns =
	275	test_bit(DMA_FENCE_FLAG_TIMESTAMP_BIT, &fence->flags) ?
	276	ktime_to_ns(fence->timestamp) :
	277	ktime_set(0, 0);
f7974880 JER	278
f7974880 JER	279	return info->status;
d4cab38e GP	280	}
	281
	282	static long sync_file_ioctl_fence_info(struct sync_file *sync_file,
92e06213	283	unsigned long arg)
d4cab38e	284	{
d4cab38e	285	struct sync_fence_info *fence_info = NULL;
519f490d CK	286	struct dma_fence_unwrap iter;
	287	struct sync_file_info info;
	288	unsigned int num_fences;
	289	struct dma_fence *fence;
	290	int ret;
d4cab38e	291	__u32 size;
d4cab38e GP	292
	293	if (copy_from_user(&info, (void __user *)arg, sizeof(info)))
	294	return -EFAULT;
	295
	296	if (info.flags \|\| info.pad)
	297	return -EINVAL;
	298
519f490d CK	299	num_fences = 0;
	300	dma_fence_unwrap_for_each(fence, &iter, sync_file->fence)
	301	++num_fences;
a02b9dc9	302
d4cab38e GP	303	/*
	304	* Passing num_fences = 0 means that userspace doesn't want to
	305	* retrieve any sync_fence_info. If num_fences = 0 we skip filling
	306	* sync_fence_info and return the actual number of fences on
	307	* info->num_fences.
	308	*/
f7974880	309	if (!info.num_fences) {
7891c30a	310	info.status = dma_fence_get_status(sync_file->fence);
d4cab38e	311	goto no_fences;
f7974880 JER	312	} else {
	313	info.status = 1;
	314	}
d4cab38e	315
a02b9dc9	316	if (info.num_fences < num_fences)
d4cab38e GP	317	return -EINVAL;
d4cab38e GP	318
a02b9dc9	319	size = num_fences * sizeof(*fence_info);
d4cab38e GP	320	fence_info = kzalloc(size, GFP_KERNEL);
	321	if (!fence_info)
	322	return -ENOMEM;
	323
519f490d CK	324	num_fences = 0;
	325	dma_fence_unwrap_for_each(fence, &iter, sync_file->fence) {
	326	int status;
	327
	328	status = sync_fill_fence_info(fence, &fence_info[num_fences++]);
f7974880 JER	329	info.status = info.status <= 0 ? info.status : status;
f7974880 JER	330	}
d4cab38e GP	331
	332	if (copy_to_user(u64_to_user_ptr(info.sync_fence_info), fence_info,
	333	size)) {
	334	ret = -EFAULT;
	335	goto out;
	336	}
	337
	338	no_fences:
71ebc9a3	339	sync_file_get_name(sync_file, info.name, sizeof(info.name));
a02b9dc9	340	info.num_fences = num_fences;
d4cab38e GP	341
	342	if (copy_to_user((void __user *)arg, &info, sizeof(info)))
	343	ret = -EFAULT;
	344	else
	345	ret = 0;
	346
	347	out:
	348	kfree(fence_info);
	349
	350	return ret;
	351	}
	352
	353	static long sync_file_ioctl(struct file *file, unsigned int cmd,
92e06213	354	unsigned long arg)
d4cab38e GP	355	{
	356	struct sync_file *sync_file = file->private_data;
	357
	358	switch (cmd) {
	359	case SYNC_IOC_MERGE:
	360	return sync_file_ioctl_merge(sync_file, arg);
	361
	362	case SYNC_IOC_FILE_INFO:
	363	return sync_file_ioctl_fence_info(sync_file, arg);
	364
	365	default:
	366	return -ENOTTY;
	367	}
	368	}
	369
	370	static const struct file_operations sync_file_fops = {
	371	.release = sync_file_release,
	372	.poll = sync_file_poll,
	373	.unlocked_ioctl = sync_file_ioctl,
1832f2d8	374	.compat_ioctl = compat_ptr_ioctl,
d4cab38e	375	};