[linux-2.6-block.git] / fs / nfs / nfs4file.c

/*
 *  linux/fs/nfs/file.c
 *
 *  Copyright (C) 1992  Rick Sladkey
 */
#include <linux/fs.h>
#include <linux/file.h>
#include <linux/falloc.h>
#include <linux/nfs_fs.h>
#include "delegation.h"
#include "internal.h"
#include "iostat.h"
#include "fscache.h"
#include "pnfs.h"

#include "nfstrace.h"

#ifdef CONFIG_NFS_V4_2
#include "nfs42.h"
#endif

#define NFSDBG_FACILITY		NFSDBG_FILE

static int
nfs4_file_open(struct inode *inode, struct file *filp)
{
	struct nfs_open_context *ctx;
	struct dentry *dentry = filp->f_path.dentry;
	struct dentry *parent = NULL;
	struct inode *dir;
	unsigned openflags = filp->f_flags;
	struct iattr attr;
	int err;

	/*
	 * If no cached dentry exists or if it's negative, NFSv4 handled the
	 * opens in ->lookup() or ->create().
	 *
	 * We only get this far for a cached positive dentry.  We skipped
	 * revalidation, so handle it here by dropping the dentry and returning
	 * -EOPENSTALE.  The VFS will retry the lookup/create/open.
	 */

	dprintk("NFS: open file(%pd2)\n", dentry);

	err = nfs_check_flags(openflags);
	if (err)
		return err;

	if ((openflags & O_ACCMODE) == 3)
		openflags--;

	/* We can't create new files here */
	openflags &= ~(O_CREAT|O_EXCL);

	parent = dget_parent(dentry);
	dir = d_inode(parent);

	ctx = alloc_nfs_open_context(filp->f_path.dentry, filp->f_mode);
	err = PTR_ERR(ctx);
	if (IS_ERR(ctx))
		goto out;

	attr.ia_valid = ATTR_OPEN;
	if (openflags & O_TRUNC) {
		attr.ia_valid |= ATTR_SIZE;
		attr.ia_size = 0;
		nfs_sync_inode(inode);
	}

	inode = NFS_PROTO(dir)->open_context(dir, ctx, openflags, &attr, NULL);
	if (IS_ERR(inode)) {
		err = PTR_ERR(inode);
		switch (err) {
		case -EPERM:
		case -EACCES:
		case -EDQUOT:
		case -ENOSPC:
		case -EROFS:
			goto out_put_ctx;
		default:
			goto out_drop;
		}
	}
	if (inode != d_inode(dentry))
		goto out_drop;

	nfs_set_verifier(dentry, nfs_save_change_attribute(dir));
	nfs_file_set_open_context(filp, ctx);
	nfs_fscache_open_file(inode, filp);
	err = 0;

out_put_ctx:
	put_nfs_open_context(ctx);
out:
	dput(parent);
	return err;

out_drop:
	d_drop(dentry);
	err = -EOPENSTALE;
	goto out_put_ctx;
}

/*
 * Flush all dirty pages, and check for write errors.
 */
static int
nfs4_file_flush(struct file *file, fl_owner_t id)
{
	struct inode	*inode = file_inode(file);

	dprintk("NFS: flush(%pD2)\n", file);

	nfs_inc_stats(inode, NFSIOS_VFSFLUSH);
	if ((file->f_mode & FMODE_WRITE) == 0)
		return 0;

	/*
	 * If we're holding a write delegation, then check if we're required
	 * to flush the i/o on close. If not, then just start the i/o now.
	 */
	if (!nfs4_delegation_flush_on_close(inode))
		return filemap_fdatawrite(file->f_mapping);

	/* Flush writes to the server and return any errors */
	return vfs_fsync(file, 0);
}

static int
nfs4_file_fsync(struct file *file, loff_t start, loff_t end, int datasync)
{
	int ret;
	struct inode *inode = file_inode(file);

	trace_nfs_fsync_enter(inode);

	nfs_inode_dio_wait(inode);
	do {
		ret = filemap_write_and_wait_range(inode->i_mapping, start, end);
		if (ret != 0)
			break;
		mutex_lock(&inode->i_mutex);
		ret = nfs_file_fsync_commit(file, start, end, datasync);
		if (!ret)
			ret = pnfs_sync_inode(inode, !!datasync);
		mutex_unlock(&inode->i_mutex);
		/*
		 * If nfs_file_fsync_commit detected a server reboot, then
		 * resend all dirty pages that might have been covered by
		 * the NFS_CONTEXT_RESEND_WRITES flag
		 */
		start = 0;
		end = LLONG_MAX;
	} while (ret == -EAGAIN);

	trace_nfs_fsync_exit(inode, ret);
	return ret;
}

#ifdef CONFIG_NFS_V4_2
static loff_t nfs4_file_llseek(struct file *filep, loff_t offset, int whence)
{
	loff_t ret;

	switch (whence) {
	case SEEK_HOLE:
	case SEEK_DATA:
		ret = nfs42_proc_llseek(filep, offset, whence);
		if (ret != -ENOTSUPP)
			return ret;
	default:
		return nfs_file_llseek(filep, offset, whence);
	}
}

static long nfs42_fallocate(struct file *filep, int mode, loff_t offset, loff_t len)
{
	struct inode *inode = file_inode(filep);
	long ret;

	if (!S_ISREG(inode->i_mode))
		return -EOPNOTSUPP;

	if ((mode != 0) && (mode != (FALLOC_FL_PUNCH_HOLE | FALLOC_FL_KEEP_SIZE)))
		return -EOPNOTSUPP;

	ret = inode_newsize_ok(inode, offset + len);
	if (ret < 0)
		return ret;

	if (mode & FALLOC_FL_PUNCH_HOLE)
		return nfs42_proc_deallocate(filep, offset, len);
	return nfs42_proc_allocate(filep, offset, len);
}

static noinline long
nfs42_ioctl_clone(struct file *dst_file, unsigned long srcfd,
		  u64 src_off, u64 dst_off, u64 count)
{
	struct inode *dst_inode = file_inode(dst_file);
	struct nfs_server *server = NFS_SERVER(dst_inode);
	struct fd src_file;
	struct inode *src_inode;
	unsigned int bs = server->clone_blksize;
	int ret;

	/* dst file must be opened for writing */
	if (!(dst_file->f_mode & FMODE_WRITE))
		return -EINVAL;

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

	src_file = fdget(srcfd);
	if (!src_file.file) {
		ret = -EBADF;
		goto out_drop_write;
	}

	src_inode = file_inode(src_file.file);

	/* src and dst must be different files */
	ret = -EINVAL;
	if (src_inode == dst_inode)
		goto out_fput;

	/* src file must be opened for reading */
	if (!(src_file.file->f_mode & FMODE_READ))
		goto out_fput;

	/* src and dst must be regular files */
	ret = -EISDIR;
	if (!S_ISREG(src_inode->i_mode) || !S_ISREG(dst_inode->i_mode))
		goto out_fput;

	ret = -EXDEV;
	if (src_file.file->f_path.mnt != dst_file->f_path.mnt ||
	    src_inode->i_sb != dst_inode->i_sb)
		goto out_fput;

	/* check alignment w.r.t. clone_blksize */
	ret = -EINVAL;
	if (bs) {
		if (!IS_ALIGNED(src_off, bs) || !IS_ALIGNED(dst_off, bs))
			goto out_fput;
		if (!IS_ALIGNED(count, bs) && i_size_read(src_inode) != (src_off + count))
			goto out_fput;
	}

	/* XXX: do we lock at all? what if server needs CB_RECALL_LAYOUT? */
	if (dst_inode < src_inode) {
		mutex_lock_nested(&dst_inode->i_mutex, I_MUTEX_PARENT);
		mutex_lock_nested(&src_inode->i_mutex, I_MUTEX_CHILD);
	} else {
		mutex_lock_nested(&src_inode->i_mutex, I_MUTEX_PARENT);
		mutex_lock_nested(&dst_inode->i_mutex, I_MUTEX_CHILD);
	}

	/* flush all pending writes on both src and dst so that server
	 * has the latest data */
	ret = nfs_sync_inode(src_inode);
	if (ret)
		goto out_unlock;
	ret = nfs_sync_inode(dst_inode);
	if (ret)
		goto out_unlock;

	ret = nfs42_proc_clone(src_file.file, dst_file, src_off, dst_off, count);

	/* truncate inode page cache of the dst range so that future reads can fetch
	 * new data from server */
	if (!ret)
		truncate_inode_pages_range(&dst_inode->i_data, dst_off, dst_off + count - 1);

out_unlock:
	if (dst_inode < src_inode) {
		mutex_unlock(&src_inode->i_mutex);
		mutex_unlock(&dst_inode->i_mutex);
	} else {
		mutex_unlock(&dst_inode->i_mutex);
		mutex_unlock(&src_inode->i_mutex);
	}
out_fput:
	fdput(src_file);
out_drop_write:
	mnt_drop_write_file(dst_file);
	return ret;
}

static long nfs42_ioctl_clone_range(struct file *dst_file, void __user *argp)
{
	struct nfs_ioctl_clone_range_args args;

	if (copy_from_user(&args, argp, sizeof(args)))
		return -EFAULT;

	return nfs42_ioctl_clone(dst_file, args.src_fd, args.src_off, args.dst_off, args.count);
}
#else
static long nfs42_ioctl_clone(struct file *dst_file, unsigned long srcfd,
		u64 src_off, u64 dst_off, u64 count)
{
	return -ENOTTY;
}

static long nfs42_ioctl_clone_range(struct file *dst_file, void __user *argp)
{
	return -ENOTTY;
}
#endif /* CONFIG_NFS_V4_2 */

long nfs4_ioctl(struct file *file, unsigned int cmd, unsigned long arg)
{
	void __user *argp = (void __user *)arg;

	switch (cmd) {
	case NFS_IOC_CLONE:
		return nfs42_ioctl_clone(file, arg, 0, 0, 0);
	case NFS_IOC_CLONE_RANGE:
		return nfs42_ioctl_clone_range(file, argp);
	}

	return -ENOTTY;
}

const struct file_operations nfs4_file_operations = {
#ifdef CONFIG_NFS_V4_2
	.llseek		= nfs4_file_llseek,
#else
	.llseek		= nfs_file_llseek,
#endif
	.read_iter	= nfs_file_read,
	.write_iter	= nfs_file_write,
	.mmap		= nfs_file_mmap,
	.open		= nfs4_file_open,
	.flush		= nfs4_file_flush,
	.release	= nfs_file_release,
	.fsync		= nfs4_file_fsync,
	.lock		= nfs_lock,
	.flock		= nfs_flock,
	.splice_read	= nfs_file_splice_read,
	.splice_write	= iter_file_splice_write,
#ifdef CONFIG_NFS_V4_2
	.fallocate	= nfs42_fallocate,
#endif /* CONFIG_NFS_V4_2 */
	.check_flags	= nfs_check_flags,
	.setlease	= simple_nosetlease,
#ifdef CONFIG_COMPAT
	.unlocked_ioctl = nfs4_ioctl,
#else
	.compat_ioctl	= nfs4_ioctl,
#endif /* CONFIG_COMPAT */
};
Commit	Line	Data
ce4ef7c0 BS	1	/*
	2	* linux/fs/nfs/file.c
	3	*
	4	* Copyright (C) 1992 Rick Sladkey
	5	*/
f4ac1674	6	#include <linux/fs.h>
bea51b30	7	#include <linux/file.h>
f4ac1674	8	#include <linux/falloc.h>
ce4ef7c0	9	#include <linux/nfs_fs.h>
5445b1fb	10	#include "delegation.h"
ce4ef7c0	11	#include "internal.h"
5445b1fb	12	#include "iostat.h"
a4ff1468	13	#include "fscache.h"
ce4ef7c0 BS	14	#include "pnfs.h"
ce4ef7c0 BS	15
81b79afb TM	16	#include "nfstrace.h"
81b79afb TM	17
1c6dcbe5 AS	18	#ifdef CONFIG_NFS_V4_2
	19	#include "nfs42.h"
	20	#endif
	21
ce4ef7c0 BS	22	#define NFSDBG_FACILITY NFSDBG_FILE
	23
	24	static int
	25	nfs4_file_open(struct inode inode, struct file filp)
	26	{
	27	struct nfs_open_context *ctx;
	28	struct dentry *dentry = filp->f_path.dentry;
	29	struct dentry *parent = NULL;
	30	struct inode *dir;
	31	unsigned openflags = filp->f_flags;
	32	struct iattr attr;
	33	int err;
	34
ce4ef7c0 BS	35	/*
	36	* If no cached dentry exists or if it's negative, NFSv4 handled the
	37	* opens in ->lookup() or ->create().
	38	*
	39	* We only get this far for a cached positive dentry. We skipped
	40	* revalidation, so handle it here by dropping the dentry and returning
	41	* -EOPENSTALE. The VFS will retry the lookup/create/open.
	42	*/
	43
6de1472f	44	dprintk("NFS: open file(%pd2)\n", dentry);
ce4ef7c0	45
18a60089 BC	46	err = nfs_check_flags(openflags);
	47	if (err)
	48	return err;
	49
ce4ef7c0 BS	50	if ((openflags & O_ACCMODE) == 3)
	51	openflags--;
	52
	53	/* We can't create new files here */
	54	openflags &= ~(O_CREAT\|O_EXCL);
	55
	56	parent = dget_parent(dentry);
2b0143b5	57	dir = d_inode(parent);
ce4ef7c0 BS	58
	59	ctx = alloc_nfs_open_context(filp->f_path.dentry, filp->f_mode);
	60	err = PTR_ERR(ctx);
	61	if (IS_ERR(ctx))
	62	goto out;
	63
	64	attr.ia_valid = ATTR_OPEN;
	65	if (openflags & O_TRUNC) {
	66	attr.ia_valid \|= ATTR_SIZE;
	67	attr.ia_size = 0;
9e1681c2	68	nfs_sync_inode(inode);
ce4ef7c0 BS	69	}
ce4ef7c0 BS	70
c5c3fb5f	71	inode = NFS_PROTO(dir)->open_context(dir, ctx, openflags, &attr, NULL);
ce4ef7c0 BS	72	if (IS_ERR(inode)) {
	73	err = PTR_ERR(inode);
	74	switch (err) {
	75	case -EPERM:
	76	case -EACCES:
	77	case -EDQUOT:
	78	case -ENOSPC:
	79	case -EROFS:
	80	goto out_put_ctx;
	81	default:
	82	goto out_drop;
	83	}
	84	}
2b0143b5	85	if (inode != d_inode(dentry))
ce4ef7c0 BS	86	goto out_drop;
	87
	88	nfs_set_verifier(dentry, nfs_save_change_attribute(dir));
	89	nfs_file_set_open_context(filp, ctx);
f1fe29b4	90	nfs_fscache_open_file(inode, filp);
ce4ef7c0 BS	91	err = 0;
	92
	93	out_put_ctx:
	94	put_nfs_open_context(ctx);
	95	out:
	96	dput(parent);
	97	return err;
	98
	99	out_drop:
	100	d_drop(dentry);
	101	err = -EOPENSTALE;
	102	goto out_put_ctx;
	103	}
	104
5445b1fb TM	105	/*
	106	* Flush all dirty pages, and check for write errors.
	107	*/
	108	static int
	109	nfs4_file_flush(struct file *file, fl_owner_t id)
	110	{
	111	struct inode *inode = file_inode(file);
	112
	113	dprintk("NFS: flush(%pD2)\n", file);
	114
	115	nfs_inc_stats(inode, NFSIOS_VFSFLUSH);
	116	if ((file->f_mode & FMODE_WRITE) == 0)
	117	return 0;
	118
	119	/*
	120	* If we're holding a write delegation, then check if we're required
	121	* to flush the i/o on close. If not, then just start the i/o now.
	122	*/
	123	if (!nfs4_delegation_flush_on_close(inode))
	124	return filemap_fdatawrite(file->f_mapping);
	125
	126	/* Flush writes to the server and return any errors */
	127	return vfs_fsync(file, 0);
	128	}
	129
ce4ef7c0 BS	130	static int
	131	nfs4_file_fsync(struct file *file, loff_t start, loff_t end, int datasync)
	132	{
	133	int ret;
496ad9aa	134	struct inode *inode = file_inode(file);
ce4ef7c0	135
81b79afb TM	136	trace_nfs_fsync_enter(inode);
81b79afb TM	137
a0815d55	138	nfs_inode_dio_wait(inode);
05990d1b TM	139	do {
	140	ret = filemap_write_and_wait_range(inode->i_mapping, start, end);
	141	if (ret != 0)
	142	break;
	143	mutex_lock(&inode->i_mutex);
	144	ret = nfs_file_fsync_commit(file, start, end, datasync);
1b33809e	145	if (!ret)
5bb89b47	146	ret = pnfs_sync_inode(inode, !!datasync);
05990d1b	147	mutex_unlock(&inode->i_mutex);
dcfc4f25 TM	148	/*
	149	* If nfs_file_fsync_commit detected a server reboot, then
	150	* resend all dirty pages that might have been covered by
	151	* the NFS_CONTEXT_RESEND_WRITES flag
	152	*/
	153	start = 0;
	154	end = LLONG_MAX;
05990d1b TM	155	} while (ret == -EAGAIN);
05990d1b TM	156
81b79afb	157	trace_nfs_fsync_exit(inode, ret);
ce4ef7c0 BS	158	return ret;
	159	}
	160
1c6dcbe5 AS	161	#ifdef CONFIG_NFS_V4_2
	162	static loff_t nfs4_file_llseek(struct file *filep, loff_t offset, int whence)
	163	{
	164	loff_t ret;
	165
	166	switch (whence) {
	167	case SEEK_HOLE:
	168	case SEEK_DATA:
	169	ret = nfs42_proc_llseek(filep, offset, whence);
	170	if (ret != -ENOTSUPP)
	171	return ret;
	172	default:
	173	return nfs_file_llseek(filep, offset, whence);
	174	}
	175	}
f4ac1674 AS	176
	177	static long nfs42_fallocate(struct file *filep, int mode, loff_t offset, loff_t len)
	178	{
	179	struct inode *inode = file_inode(filep);
	180	long ret;
	181
	182	if (!S_ISREG(inode->i_mode))
	183	return -EOPNOTSUPP;
	184
624bd5b7	185	if ((mode != 0) && (mode != (FALLOC_FL_PUNCH_HOLE \| FALLOC_FL_KEEP_SIZE)))
f4ac1674 AS	186	return -EOPNOTSUPP;
	187
	188	ret = inode_newsize_ok(inode, offset + len);
	189	if (ret < 0)
	190	return ret;
	191
624bd5b7	192	if (mode & FALLOC_FL_PUNCH_HOLE)
f830f7dd AS	193	return nfs42_proc_deallocate(filep, offset, len);
f830f7dd AS	194	return nfs42_proc_allocate(filep, offset, len);
f4ac1674	195	}
bea51b30 PT	196
	197	static noinline long
	198	nfs42_ioctl_clone(struct file *dst_file, unsigned long srcfd,
	199	u64 src_off, u64 dst_off, u64 count)
	200	{
	201	struct inode *dst_inode = file_inode(dst_file);
811b7b85	202	struct nfs_server *server = NFS_SERVER(dst_inode);
bea51b30 PT	203	struct fd src_file;
bea51b30 PT	204	struct inode *src_inode;
811b7b85	205	unsigned int bs = server->clone_blksize;
bea51b30 PT	206	int ret;
	207
	208	/* dst file must be opened for writing */
	209	if (!(dst_file->f_mode & FMODE_WRITE))
	210	return -EINVAL;
	211
	212	ret = mnt_want_write_file(dst_file);
	213	if (ret)
	214	return ret;
	215
	216	src_file = fdget(srcfd);
	217	if (!src_file.file) {
	218	ret = -EBADF;
	219	goto out_drop_write;
	220	}
	221
	222	src_inode = file_inode(src_file.file);
	223
	224	/* src and dst must be different files */
	225	ret = -EINVAL;
	226	if (src_inode == dst_inode)
	227	goto out_fput;
	228
	229	/* src file must be opened for reading */
	230	if (!(src_file.file->f_mode & FMODE_READ))
	231	goto out_fput;
	232
	233	/* src and dst must be regular files */
	234	ret = -EISDIR;
	235	if (!S_ISREG(src_inode->i_mode) \|\| !S_ISREG(dst_inode->i_mode))
	236	goto out_fput;
	237
	238	ret = -EXDEV;
	239	if (src_file.file->f_path.mnt != dst_file->f_path.mnt \|\|
	240	src_inode->i_sb != dst_inode->i_sb)
	241	goto out_fput;
	242
811b7b85 PT	243	/* check alignment w.r.t. clone_blksize */
	244	ret = -EINVAL;
	245	if (bs) {
	246	if (!IS_ALIGNED(src_off, bs) \|\| !IS_ALIGNED(dst_off, bs))
	247	goto out_fput;
	248	if (!IS_ALIGNED(count, bs) && i_size_read(src_inode) != (src_off + count))
	249	goto out_fput;
	250	}
	251
bea51b30 PT	252	/* XXX: do we lock at all? what if server needs CB_RECALL_LAYOUT? */
	253	if (dst_inode < src_inode) {
	254	mutex_lock_nested(&dst_inode->i_mutex, I_MUTEX_PARENT);
	255	mutex_lock_nested(&src_inode->i_mutex, I_MUTEX_CHILD);
	256	} else {
	257	mutex_lock_nested(&src_inode->i_mutex, I_MUTEX_PARENT);
	258	mutex_lock_nested(&dst_inode->i_mutex, I_MUTEX_CHILD);
	259	}
	260
	261	/* flush all pending writes on both src and dst so that server
	262	* has the latest data */
	263	ret = nfs_sync_inode(src_inode);
	264	if (ret)
	265	goto out_unlock;
	266	ret = nfs_sync_inode(dst_inode);
	267	if (ret)
	268	goto out_unlock;
	269
	270	ret = nfs42_proc_clone(src_file.file, dst_file, src_off, dst_off, count);
	271
	272	/* truncate inode page cache of the dst range so that future reads can fetch
	273	* new data from server */
	274	if (!ret)
	275	truncate_inode_pages_range(&dst_inode->i_data, dst_off, dst_off + count - 1);
	276
	277	out_unlock:
	278	if (dst_inode < src_inode) {
	279	mutex_unlock(&src_inode->i_mutex);
	280	mutex_unlock(&dst_inode->i_mutex);
	281	} else {
	282	mutex_unlock(&dst_inode->i_mutex);
	283	mutex_unlock(&src_inode->i_mutex);
	284	}
	285	out_fput:
	286	fdput(src_file);
	287	out_drop_write:
	288	mnt_drop_write_file(dst_file);
	289	return ret;
	290	}
a340abcf PT	291
	292	static long nfs42_ioctl_clone_range(struct file dst_file, void __user argp)
	293	{
	294	struct nfs_ioctl_clone_range_args args;
	295
	296	if (copy_from_user(&args, argp, sizeof(args)))
	297	return -EFAULT;
	298
	299	return nfs42_ioctl_clone(dst_file, args.src_fd, args.src_off, args.dst_off, args.count);
	300	}
275058a2 TM	301	#else
	302	static long nfs42_ioctl_clone(struct file *dst_file, unsigned long srcfd,
	303	u64 src_off, u64 dst_off, u64 count)
	304	{
	305	return -ENOTTY;
	306	}
	307
	308	static long nfs42_ioctl_clone_range(struct file dst_file, void __user argp)
	309	{
	310	return -ENOTTY;
	311	}
1c6dcbe5 AS	312	#endif /* CONFIG_NFS_V4_2 */
1c6dcbe5 AS	313
bea51b30 PT	314	long nfs4_ioctl(struct file *file, unsigned int cmd, unsigned long arg)
bea51b30 PT	315	{
a340abcf PT	316	void __user argp = (void __user )arg;
a340abcf PT	317
bea51b30	318	switch (cmd) {
bea51b30 PT	319	case NFS_IOC_CLONE:
bea51b30 PT	320	return nfs42_ioctl_clone(file, arg, 0, 0, 0);
a340abcf PT	321	case NFS_IOC_CLONE_RANGE:
a340abcf PT	322	return nfs42_ioctl_clone_range(file, argp);
bea51b30 PT	323	}
	324
	325	return -ENOTTY;
	326	}
	327
ce4ef7c0	328	const struct file_operations nfs4_file_operations = {
1c6dcbe5 AS	329	#ifdef CONFIG_NFS_V4_2
	330	.llseek = nfs4_file_llseek,
	331	#else
ce4ef7c0	332	.llseek = nfs_file_llseek,
1c6dcbe5	333	#endif
3aa2d199	334	.read_iter = nfs_file_read,
edaf4369	335	.write_iter = nfs_file_write,
ce4ef7c0 BS	336	.mmap = nfs_file_mmap,
ce4ef7c0 BS	337	.open = nfs4_file_open,
5445b1fb	338	.flush = nfs4_file_flush,
ce4ef7c0 BS	339	.release = nfs_file_release,
	340	.fsync = nfs4_file_fsync,
	341	.lock = nfs_lock,
	342	.flock = nfs_flock,
	343	.splice_read = nfs_file_splice_read,
4da54c21	344	.splice_write = iter_file_splice_write,
f4ac1674 AS	345	#ifdef CONFIG_NFS_V4_2
	346	.fallocate = nfs42_fallocate,
	347	#endif /* CONFIG_NFS_V4_2 */
ce4ef7c0	348	.check_flags = nfs_check_flags,
1c994a09	349	.setlease = simple_nosetlease,
bea51b30 PT	350	#ifdef CONFIG_COMPAT
	351	.unlocked_ioctl = nfs4_ioctl,
	352	#else
	353	.compat_ioctl = nfs4_ioctl,
	354	#endif /* CONFIG_COMPAT */
ce4ef7c0	355	};