[people/ms/linux.git] / fs / nfs / nfs42.h

/* SPDX-License-Identifier: GPL-2.0 */
/*
 * Copyright (c) 2014 Anna Schumaker <Anna.Schumaker@Netapp.com>
 */

#ifndef __LINUX_FS_NFS_NFS4_2_H
#define __LINUX_FS_NFS_NFS4_2_H

#include <linux/xattr.h>

/*
 * FIXME:  four LAYOUTSTATS calls per compound at most! Do we need to support
 * more? Need to consider not to pre-alloc too much for a compound.
 */
#define PNFS_LAYOUTSTATS_MAXDEV (4)

/* nfs4.2proc.c */
#ifdef CONFIG_NFS_V4_2
int nfs42_proc_allocate(struct file *, loff_t, loff_t);
ssize_t nfs42_proc_copy(struct file *, loff_t, struct file *, loff_t, size_t,
			struct nl4_server *, nfs4_stateid *, bool);
int nfs42_proc_deallocate(struct file *, loff_t, loff_t);
loff_t nfs42_proc_llseek(struct file *, loff_t, int);
int nfs42_proc_layoutstats_generic(struct nfs_server *,
				   struct nfs42_layoutstat_data *);
int nfs42_proc_clone(struct file *, struct file *, loff_t, loff_t, loff_t);
int nfs42_proc_layouterror(struct pnfs_layout_segment *lseg,
			   const struct nfs42_layout_error *errors,
			   size_t n);
int nfs42_proc_copy_notify(struct file *, struct file *,
			   struct nfs42_copy_notify_res *);
static inline bool nfs42_files_from_same_server(struct file *in,
						struct file *out)
{
	struct nfs_client *c_in = (NFS_SERVER(file_inode(in)))->nfs_client;
	struct nfs_client *c_out = (NFS_SERVER(file_inode(out)))->nfs_client;

	return nfs4_check_serverowner_major_id(c_in->cl_serverowner,
					       c_out->cl_serverowner);
}

ssize_t nfs42_proc_getxattr(struct inode *inode, const char *name,
			    void *buf, size_t buflen);
int nfs42_proc_setxattr(struct inode *inode, const char *name,
			const void *buf, size_t buflen, int flags);
ssize_t nfs42_proc_listxattrs(struct inode *inode, void *buf,
			       size_t buflen, u64 *cookiep, bool *eofp);
int nfs42_proc_removexattr(struct inode *inode, const char *name);

/*
 * Maximum XDR buffer size needed for a listxattr buffer of buflen size.
 *
 * The upper boundary is a buffer with all 1-byte sized attribute names.
 * They would be 7 bytes long in the eventual buffer ("user.x\0"), and
 * 8 bytes long XDR-encoded.
 *
 * Include the trailing eof word as well.
 */
static inline u32 nfs42_listxattr_xdrsize(u32 buflen)
{
	return ((buflen / (XATTR_USER_PREFIX_LEN + 2)) * 8) + 4;
}
#endif /* CONFIG_NFS_V4_2 */
#endif /* __LINUX_FS_NFS_NFS4_2_H */
Commit	Line	Data
b2441318	1	/* SPDX-License-Identifier: GPL-2.0 */
1c6dcbe5 AS	2	/*
	3	* Copyright (c) 2014 Anna Schumaker <Anna.Schumaker@Netapp.com>
	4	*/
	5
	6	#ifndef __LINUX_FS_NFS_NFS4_2_H
	7	#define __LINUX_FS_NFS_NFS4_2_H
	8
04a5da69 FL	9	#include <linux/xattr.h>
04a5da69 FL	10
be3a5d23 TM	11	/*
	12	* FIXME: four LAYOUTSTATS calls per compound at most! Do we need to support
	13	* more? Need to consider not to pre-alloc too much for a compound.
	14	*/
	15	#define PNFS_LAYOUTSTATS_MAXDEV (4)
	16
1c6dcbe5	17	/* nfs4.2proc.c */
0491567b	18	#ifdef CONFIG_NFS_V4_2
f4ac1674	19	int nfs42_proc_allocate(struct file *, loff_t, loff_t);
1d38f3f0	20	ssize_t nfs42_proc_copy(struct file , loff_t, struct file , loff_t, size_t,
12751010	21	struct nl4_server , nfs4_stateid , bool);
624bd5b7	22	int nfs42_proc_deallocate(struct file *, loff_t, loff_t);
1c6dcbe5	23	loff_t nfs42_proc_llseek(struct file *, loff_t, int);
be3a5d23 TM	24	int nfs42_proc_layoutstats_generic(struct nfs_server *,
be3a5d23 TM	25	struct nfs42_layoutstat_data *);
e5341f3a	26	int nfs42_proc_clone(struct file , struct file , loff_t, loff_t, loff_t);
3eb86093 TM	27	int nfs42_proc_layouterror(struct pnfs_layout_segment *lseg,
	28	const struct nfs42_layout_error *errors,
	29	size_t n);
0491567b OK	30	int nfs42_proc_copy_notify(struct file , struct file ,
	31	struct nfs42_copy_notify_res *);
	32	static inline bool nfs42_files_from_same_server(struct file *in,
	33	struct file *out)
	34	{
	35	struct nfs_client *c_in = (NFS_SERVER(file_inode(in)))->nfs_client;
	36	struct nfs_client *c_out = (NFS_SERVER(file_inode(out)))->nfs_client;
1c6dcbe5	37
0491567b OK	38	return nfs4_check_serverowner_major_id(c_in->cl_serverowner,
	39	c_out->cl_serverowner);
	40	}
04a5da69	41
c10a7514 FL	42	ssize_t nfs42_proc_getxattr(struct inode inode, const char name,
	43	void *buf, size_t buflen);
	44	int nfs42_proc_setxattr(struct inode inode, const char name,
	45	const void *buf, size_t buflen, int flags);
	46	ssize_t nfs42_proc_listxattrs(struct inode inode, void buf,
	47	size_t buflen, u64 cookiep, bool eofp);
	48	int nfs42_proc_removexattr(struct inode inode, const char name);
	49
04a5da69 FL	50	/*
	51	* Maximum XDR buffer size needed for a listxattr buffer of buflen size.
	52	*
	53	* The upper boundary is a buffer with all 1-byte sized attribute names.
	54	* They would be 7 bytes long in the eventual buffer ("user.x\0"), and
	55	* 8 bytes long XDR-encoded.
	56	*
	57	* Include the trailing eof word as well.
	58	*/
	59	static inline u32 nfs42_listxattr_xdrsize(u32 buflen)
	60	{
	61	return ((buflen / (XATTR_USER_PREFIX_LEN + 2)) * 8) + 4;
	62	}
0491567b	63	#endif /* CONFIG_NFS_V4_2 */
1c6dcbe5	64	#endif /* __LINUX_FS_NFS_NFS4_2_H */