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

/* SPDX-License-Identifier: GPL-2.0 */
/*
 * Copyright (c) 2014 Anna Schumaker <[email protected]>
 */

#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)
#define READ_PLUS_SCRATCH_SIZE (16)

/* 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 and make the result a multiple
 * of 4 bytes.
 */
static inline u32 nfs42_listxattr_xdrsize(u32 buflen)
{
	u32 size = 8 * buflen / (XATTR_USER_PREFIX_LEN + 2) + 4;

	return (size + 3) & ~3;
}
#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 <[email protected]>
	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)
303a7805	16	#define READ_PLUS_SCRATCH_SIZE (16)
be3a5d23	17
1c6dcbe5	18	/* nfs4.2proc.c */
0491567b	19	#ifdef CONFIG_NFS_V4_2
f4ac1674	20	int nfs42_proc_allocate(struct file *, loff_t, loff_t);
1d38f3f0	21	ssize_t nfs42_proc_copy(struct file , loff_t, struct file , loff_t, size_t,
12751010	22	struct nl4_server , nfs4_stateid , bool);
624bd5b7	23	int nfs42_proc_deallocate(struct file *, loff_t, loff_t);
1c6dcbe5	24	loff_t nfs42_proc_llseek(struct file *, loff_t, int);
be3a5d23 TM	25	int nfs42_proc_layoutstats_generic(struct nfs_server *,
be3a5d23 TM	26	struct nfs42_layoutstat_data *);
e5341f3a	27	int nfs42_proc_clone(struct file , struct file , loff_t, loff_t, loff_t);
3eb86093 TM	28	int nfs42_proc_layouterror(struct pnfs_layout_segment *lseg,
	29	const struct nfs42_layout_error *errors,
	30	size_t n);
0491567b OK	31	int nfs42_proc_copy_notify(struct file , struct file ,
	32	struct nfs42_copy_notify_res *);
	33	static inline bool nfs42_files_from_same_server(struct file *in,
	34	struct file *out)
	35	{
	36	struct nfs_client *c_in = (NFS_SERVER(file_inode(in)))->nfs_client;
	37	struct nfs_client *c_out = (NFS_SERVER(file_inode(out)))->nfs_client;
1c6dcbe5	38
0491567b OK	39	return nfs4_check_serverowner_major_id(c_in->cl_serverowner,
	40	c_out->cl_serverowner);
	41	}
04a5da69	42
c10a7514 FL	43	ssize_t nfs42_proc_getxattr(struct inode inode, const char name,
	44	void *buf, size_t buflen);
	45	int nfs42_proc_setxattr(struct inode inode, const char name,
	46	const void *buf, size_t buflen, int flags);
	47	ssize_t nfs42_proc_listxattrs(struct inode inode, void buf,
	48	size_t buflen, u64 cookiep, bool eofp);
	49	int nfs42_proc_removexattr(struct inode inode, const char name);
	50
04a5da69 FL	51	/*
	52	* Maximum XDR buffer size needed for a listxattr buffer of buflen size.
	53	*
	54	* The upper boundary is a buffer with all 1-byte sized attribute names.
	55	* They would be 7 bytes long in the eventual buffer ("user.x\0"), and
	56	* 8 bytes long XDR-encoded.
	57	*
bcac8bff JM	58	* Include the trailing eof word as well and make the result a multiple
bcac8bff JM	59	* of 4 bytes.
04a5da69 FL	60	*/
	61	static inline u32 nfs42_listxattr_xdrsize(u32 buflen)
	62	{
bcac8bff JM	63	u32 size = 8 * buflen / (XATTR_USER_PREFIX_LEN + 2) + 4;
	64
	65	return (size + 3) & ~3;
04a5da69	66	}
0491567b	67	#endif /* CONFIG_NFS_V4_2 */
1c6dcbe5	68	#endif /* __LINUX_FS_NFS_NFS4_2_H */