[linux.git] / include / linux / nfs.h

/*
 * NFS protocol definitions
 *
 * This file contains constants mostly for Version 2 of the protocol,
 * but also has a couple of NFSv3 bits in (notably the error codes).
 */
#ifndef _LINUX_NFS_H
#define _LINUX_NFS_H

#include <linux/sunrpc/msg_prot.h>
#include <linux/string.h>
#include <uapi/linux/nfs.h>

/*
 * This is the kernel NFS client file handle representation
 */
#define NFS_MAXFHSIZE		128
struct nfs_fh {
	unsigned short		size;
	unsigned char		data[NFS_MAXFHSIZE];
};

/*
 * Returns a zero iff the size and data fields match.
 * Checks only "size" bytes in the data field.
 */
static inline int nfs_compare_fh(const struct nfs_fh *a, const struct nfs_fh *b)
{
	return a->size != b->size || memcmp(a->data, b->data, a->size) != 0;
}

static inline void nfs_copy_fh(struct nfs_fh *target, const struct nfs_fh *source)
{
	target->size = source->size;
	memcpy(target->data, source->data, source->size);
}


/*
 * This is really a general kernel constant, but since nothing like
 * this is defined in the kernel headers, I have to do it here.
 */
#define NFS_OFFSET_MAX		((__s64)((~(__u64)0) >> 1))


enum nfs3_stable_how {
	NFS_UNSTABLE = 0,
	NFS_DATA_SYNC = 1,
	NFS_FILE_SYNC = 2,

	/* used by direct.c to mark verf as invalid */
	NFS_INVALID_STABLE_HOW = -1
};
#endif /* _LINUX_NFS_H */
Commit	Line	Data
1da177e4 LT	1	/*
	2	* NFS protocol definitions
	3	*
	4	* This file contains constants mostly for Version 2 of the protocol,
	5	* but also has a couple of NFSv3 bits in (notably the error codes).
	6	*/
	7	#ifndef _LINUX_NFS_H
	8	#define _LINUX_NFS_H
	9
997b7af2 DW	10	#include <linux/sunrpc/msg_prot.h>
997b7af2 DW	11	#include <linux/string.h>
607ca46e	12	#include <uapi/linux/nfs.h>
997b7af2	13
1da177e4 LT	14	/*
	15	* This is the kernel NFS client file handle representation
	16	*/
	17	#define NFS_MAXFHSIZE 128
	18	struct nfs_fh {
	19	unsigned short size;
	20	unsigned char data[NFS_MAXFHSIZE];
	21	};
	22
	23	/*
	24	* Returns a zero iff the size and data fields match.
	25	* Checks only "size" bytes in the data field.
	26	*/
	27	static inline int nfs_compare_fh(const struct nfs_fh a, const struct nfs_fh b)
	28	{
	29	return a->size != b->size \|\| memcmp(a->data, b->data, a->size) != 0;
	30	}
	31
	32	static inline void nfs_copy_fh(struct nfs_fh target, const struct nfs_fh source)
	33	{
	34	target->size = source->size;
	35	memcpy(target->data, source->data, source->size);
	36	}
	37
	38
	39	/*
	40	* This is really a general kernel constant, but since nothing like
	41	* this is defined in the kernel headers, I have to do it here.
	42	*/
	43	#define NFS_OFFSET_MAX ((__s64)((~(__u64)0) >> 1))
	44
	45
	46	enum nfs3_stable_how {
	47	NFS_UNSTABLE = 0,
	48	NFS_DATA_SYNC = 1,
5002c586 WAA	49	NFS_FILE_SYNC = 2,
	50
	51	/* used by direct.c to mark verf as invalid */
	52	NFS_INVALID_STABLE_HOW = -1
1da177e4	53	};
1da177e4	54	#endif /* _LINUX_NFS_H */