cregit-Linux how code gets into the kernel

Release 4.7 include/uapi/linux/nfs4_mount.h

#ifndef _LINUX_NFS4_MOUNT_H

#define _LINUX_NFS4_MOUNT_H

/*
 *  linux/include/linux/nfs4_mount.h
 *
 *  Copyright (C) 2002  Trond Myklebust
 *
 *  structure passed from user-space to kernel-space during an nfsv4 mount
 */

/*
 * WARNING!  Do not delete or change the order of these fields.  If
 * a new field is required then add it to the end.  The version field
 * tracks which fields are present.  This will ensure some measure of
 * mount-to-kernel version compatibility.  Some of these aren't used yet
 * but here they are anyway.
 */

#define NFS4_MOUNT_VERSION	1


struct nfs_string {
	
unsigned int len;
	
const char __user * data;
};


struct nfs4_mount_data {
	
int version;				/* 1 */
	
int flags;				/* 1 */
	
int rsize;				/* 1 */
	
int wsize;				/* 1 */
	
int timeo;				/* 1 */
	
int retrans;				/* 1 */
	
int acregmin;				/* 1 */
	
int acregmax;				/* 1 */
	
int acdirmin;				/* 1 */
	
int acdirmax;				/* 1 */

	/* see the definition of 'struct clientaddr4' in RFC3010 */
	
struct nfs_string client_addr;		/* 1 */

	/* Mount path */
	
struct nfs_string mnt_path;		/* 1 */

	/* Server details */
	
struct nfs_string hostname;		/* 1 */
	/* Server IP address */
	
unsigned int host_addrlen;		/* 1 */
	
struct sockaddr __user * host_addr;	/* 1 */

	/* Transport protocol to use */
	
int proto;				/* 1 */

	/* Pseudo-flavours to use for authentication. See RFC2623 */
	
int auth_flavourlen;			/* 1 */
	
int __user *auth_flavours;		/* 1 */
};

/* bits in the flags field */
/* Note: the fields that correspond to existing NFSv2/v3 mount options
 *       should mirror the values from include/linux/nfs_mount.h
 */


#define NFS4_MOUNT_SOFT		0x0001	
/* 1 */

#define NFS4_MOUNT_INTR		0x0002	
/* 1 */

#define NFS4_MOUNT_NOCTO	0x0010	
/* 1 */

#define NFS4_MOUNT_NOAC		0x0020	
/* 1 */

#define NFS4_MOUNT_STRICTLOCK	0x1000	
/* 1 */

#define NFS4_MOUNT_UNSHARED	0x8000	
/* 1 */

#define NFS4_MOUNT_FLAGMASK	0x9033

#endif

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