/*
 * Copyright (c) 2000-2018 Apple Inc. All rights reserved.
 *
 * @APPLE_OSREFERENCE_LICENSE_HEADER_START@
 *
 * This file contains Original Code and/or Modifications of Original Code
 * as defined in and that are subject to the Apple Public Source License
 * Version 2.0 (the 'License'). You may not use this file except in
 * compliance with the License. The rights granted to you under the License
 * may not be used to create, or enable the creation or redistribution of,
 * unlawful or unlicensed copies of an Apple operating system, or to
 * circumvent, violate, or enable the circumvention or violation of, any
 * terms of an Apple operating system software license agreement.
 *
 * Please obtain a copy of the License at
 * http://www.opensource.apple.com/apsl/ and read it before using this file.
 *
 * The Original Code and all software distributed under the License are
 * distributed on an 'AS IS' basis, WITHOUT WARRANTY OF ANY KIND, EITHER
 * EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES,
 * INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY,
 * FITNESS FOR A PARTICULAR PURPOSE, QUIET ENJOYMENT OR NON-INFRINGEMENT.
 * Please see the License for the specific language governing rights and
 * limitations under the License.
 *
 * @APPLE_OSREFERENCE_LICENSE_HEADER_END@
 */
/* Copyright (c) 1995 NeXT Computer, Inc. All Rights Reserved */
/*
 * Copyright (c) 1989, 1993, 1995
 *	The Regents of the University of California.  All rights reserved.
 *
 * This code is derived from software contributed to Berkeley by
 * Rick Macklem at The University of Guelph.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions
 * are met:
 * 1. Redistributions of source code must retain the above copyright
 *    notice, this list of conditions and the following disclaimer.
 * 2. Redistributions in binary form must reproduce the above copyright
 *    notice, this list of conditions and the following disclaimer in the
 *    documentation and/or other materials provided with the distribution.
 * 3. All advertising materials mentioning features or use of this software
 *    must display the following acknowledgement:
 *	This product includes software developed by the University of
 *	California, Berkeley and its contributors.
 * 4. Neither the name of the University nor the names of its contributors
 *    may be used to endorse or promote products derived from this software
 *    without specific prior written permission.
 *
 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
 * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
 * SUCH DAMAGE.
 *
 *	@(#)nfs.h	8.4 (Berkeley) 5/1/95
 * FreeBSD-Id: nfs.h,v 1.32 1997/10/12 20:25:38 phk Exp $
 */

#ifndef _NFS_NFS_H_
#define _NFS_NFS_H_

#include <sys/appleapiopts.h>
#include <sys/cdefs.h>
#include <sys/socket.h>
#include <sys/mount.h>
#include <sys/ioccom.h>

#ifdef KERNEL
#include <sys/vnode.h>
#include <sys/user.h>
#include <net/radix.h>
#include <kern/locks.h>
#include <kern/lock_group.h>
#endif

#include <nfs/rpcv2.h>
#include <nfs/nfsproto.h>

#ifdef __APPLE_API_PRIVATE
/*
 * Tunable constants for nfs
 */

#define NFS_TICKINTVL   5               /* Desired time for a tick (msec) */
#define NFS_HZ          (hz / nfs_ticks) /* Ticks/sec */
extern int nfs_ticks;
#define NFS_TIMEO       (1 * NFS_HZ)    /* Default timeout = 1 second */
#define NFS_MINTIMEO    (1 * NFS_HZ)    /* Min timeout to use */
#define NFS_MAXTIMEO    (60 * NFS_HZ)   /* Max timeout to backoff to */
#define NFS_MINIDEMTIMEO (5 * NFS_HZ)   /* Min timeout for non-idempotent ops*/
#define NFS_MAXREXMIT   100             /* Stop counting after this many */
#define NFS_RETRANS     10              /* Num of retrans for soft mounts */
#define NFS_TRYLATERDEL 4               /* Initial try later delay (sec) */
#define NFS_MAXGRPS     16U             /* Max. size of groups list */
#define NFS_MINATTRTIMO 5               /* Attribute cache timeout in sec */
#define NFS_MAXATTRTIMO 60
#define NFS_MINDIRATTRTIMO 5            /* directory attribute cache timeout in sec */
#define NFS_MAXDIRATTRTIMO 60
#define NFS_MAXPORT     0xffff
#define NFS_IOSIZE      (1024 * 1024)   /* suggested I/O size */
#define NFS_RWSIZE      32768           /* Def. read/write data size <= 32K */
#define NFS_WSIZE       NFS_RWSIZE      /* Def. write data size <= 32K */
#define NFS_RSIZE       NFS_RWSIZE      /* Def. read data size <= 32K */
#define NFS_DGRAM_WSIZE 8192            /* UDP Def. write data size <= 8K */
#define NFS_DGRAM_RSIZE 8192            /* UDP Def. read data size <= 8K */
#define NFS_READDIRSIZE 32768           /* Def. readdir size */
#define NFS_DEFRAHEAD   16              /* Def. read ahead # blocks */
#define NFS_MAXRAHEAD   128             /* Max. read ahead # blocks */
#define NFS_DEFMAXASYNCWRITES   128     /* Def. max # concurrent async write RPCs */
#define NFS_DEFASYNCTHREAD      16      /* Def. # nfsiod threads */
#define NFS_MAXASYNCTHREAD      64      /* max # nfsiod threads */
#define NFS_ASYNCTHREADMAXIDLE  60      /* Seconds before idle nfsiods are reaped */
#define NFS_DEFSTATFSRATELIMIT  10      /* Def. max # statfs RPCs per second */
#define NFS_REQUESTDELAY        10      /* ms interval to check request queue */
#define NFSRV_MAXWGATHERDELAY   100     /* Max. write gather delay (msec) */
#ifndef NFSRV_WGATHERDELAY
#define NFSRV_WGATHERDELAY      1       /* Default write gather delay (msec) */
#endif
#define NFS_DIRBLKSIZ   4096            /* size of NFS directory buffers */
#if defined(KERNEL) && !defined(DIRBLKSIZ)
#define DIRBLKSIZ       512             /* XXX we used to use ufs's DIRBLKSIZ */
                                        /* can't be larger than NFS_FABLKSIZE */
#endif

/* default values for unresponsive mount timeouts */
#define NFS_TPRINTF_INITIAL_DELAY       5
#define NFS_TPRINTF_DELAY               30

/* NFS client mount timeouts */
#define NFS_MOUNT_TIMEOUT               30
#define NFS_MOUNT_QUICK_TIMEOUT         8

/*
 * Oddballs
 */
#define NFS_CMPFH(n, f, s) \
	((n)->n_fhsize == (s) && !bcmp((caddr_t)(n)->n_fhp, (caddr_t)(f), (s)))
#define NFSRV_NDMAXDATA(n) \
	        (((n)->nd_vers == NFS_VER3) ? (((n)->nd_nam2) ? \
	         NFS_MAXDGRAMDATA : NFSRV_MAXDATA) : NFS_V2MAXDATA)
#define NFS_PORT_INVALID(port) \
	(((port) > NFS_MAXPORT) || ((port) < 0))

/*
 * The IO_METASYNC flag should be implemented for local file systems.
 * (Until then, it is nothin at all.)
 */
#ifndef IO_METASYNC
#define IO_METASYNC     0
#endif

/*
 * Expected allocation sizes for major data structures. If the actual size
 * of the structure exceeds these sizes, then malloc() will be allocating
 * almost twice the memory required. This is used in nfs_init() to warn
 * the sysadmin that the size of a structure should be reduced.
 * (These sizes are always a power of 2. If the kernel malloc() changes
 *  to one that does not allocate space in powers of 2 size, then this all
 *  becomes bunk!).
 * Note that some of these structures come out of their own nfs zones.
 */
#define NFS_NODEALLOC   1024
#define NFS_MNTALLOC    2048
#define NFS_SVCALLOC    512

#define NFS_ARGSVERSION_XDR     88      /* NFS mount args are in XDR format */

#define NFS_XDRARGS_VERSION_0   0
#define NFS_MATTR_BITMAP_LEN    2               /* length of mount attributes bitmap */
#define NFS_MFLAG_BITMAP_LEN    1               /* length of mount flags bitmap */

/* NFS mount attributes */
#define NFS_MATTR_FLAGS                 0       /* mount flags (NFS_MATTR_*) */
#define NFS_MATTR_NFS_VERSION           1       /* NFS protocol version */
#define NFS_MATTR_NFS_MINOR_VERSION     2       /* NFS protocol minor version */
#define NFS_MATTR_READ_SIZE             3       /* READ RPC size */
#define NFS_MATTR_WRITE_SIZE            4       /* WRITE RPC size */
#define NFS_MATTR_READDIR_SIZE          5       /* READDIR RPC size */
#define NFS_MATTR_READAHEAD             6       /* block readahead count */
#define NFS_MATTR_ATTRCACHE_REG_MIN     7       /* minimum attribute cache time */
#define NFS_MATTR_ATTRCACHE_REG_MAX     8       /* maximum attribute cache time */
#define NFS_MATTR_ATTRCACHE_DIR_MIN     9       /* minimum attribute cache time for dirs */
#define NFS_MATTR_ATTRCACHE_DIR_MAX     10      /* maximum attribute cache time for dirs */
#define NFS_MATTR_LOCK_MODE             11      /* advisory file locking mode (NFS_LOCK_MODE_*) */
#define NFS_MATTR_SECURITY              12      /* RPC security flavors to use */
#define NFS_MATTR_MAX_GROUP_LIST        13      /* max # of RPC AUTH_SYS groups */
#define NFS_MATTR_SOCKET_TYPE           14      /* socket transport type as a netid-like string */
#define NFS_MATTR_NFS_PORT              15      /* port # to use for NFS protocol */
#define NFS_MATTR_MOUNT_PORT            16      /* port # to use for MOUNT protocol */
#define NFS_MATTR_REQUEST_TIMEOUT       17      /* initial RPC request timeout value */
#define NFS_MATTR_SOFT_RETRY_COUNT      18      /* max RPC retransmissions for soft mounts */
#define NFS_MATTR_DEAD_TIMEOUT          19      /* how long until unresponsive mount is considered dead */
#define NFS_MATTR_FH                    20      /* file handle for mount directory */
#define NFS_MATTR_FS_LOCATIONS          21      /* list of locations for the file system */
#define NFS_MATTR_MNTFLAGS              22      /* VFS mount flags (MNT_*) */
#define NFS_MATTR_MNTFROM               23      /* fixed string to use for "f_mntfromname" */
#define NFS_MATTR_REALM                 24      /* Realm to authenticate with */
#define NFS_MATTR_PRINCIPAL             25      /* GSS principal to authenticate with */
#define NFS_MATTR_SVCPRINCIPAL          26      /* GSS principal to authenticate to, the server principal */
#define NFS_MATTR_NFS_VERSION_RANGE     27      /* Packed version range to try */
#define NFS_MATTR_KERB_ETYPE            28      /* Enctype to use for kerberos mounts */
#define NFS_MATTR_LOCAL_NFS_PORT        29      /* Unix domain socket for NFS protocol */
#define NFS_MATTR_LOCAL_MOUNT_PORT      30      /* Unix domain socket for MOUNT protocol */
#define NFS_MATTR_SET_MOUNT_OWNER       31      /* Set owner of mount point */
#define NFS_MATTR_READLINK_NOCACHE      32      /* Readlink nocache mode */
#define NFS_MATTR_ATTRCACHE_ROOTDIR_MIN 33      /* minimum attribute cache time for root dir */
#define NFS_MATTR_ATTRCACHE_ROOTDIR_MAX 34      /* maximum attribute cache time for root dir */
#define NFS_MATTR_ACCESS_CACHE          35      /* Access cache size */

/* NFS mount flags */
#define NFS_MFLAG_SOFT                  0       /* soft mount (requests fail if unresponsive) */
#define NFS_MFLAG_INTR                  1       /* allow operations to be interrupted */
#define NFS_MFLAG_RESVPORT              2       /* use a reserved port */
#define NFS_MFLAG_NOCONNECT             3       /* don't connect the socket (UDP) */
#define NFS_MFLAG_DUMBTIMER             4       /* don't estimate RTT dynamically */
#define NFS_MFLAG_CALLUMNT              5       /* call MOUNTPROC_UMNT on unmount */
#define NFS_MFLAG_RDIRPLUS              6       /* request additional info when reading directories */
#define NFS_MFLAG_NONEGNAMECACHE        7       /* don't do negative name caching */
#define NFS_MFLAG_MUTEJUKEBOX           8       /* don't treat jukebox errors as unresponsive */
#define NFS_MFLAG_EPHEMERAL             9       /* ephemeral (mirror) mount */
#define NFS_MFLAG_NOCALLBACK            10      /* don't provide callback RPC service */
#define NFS_MFLAG_NAMEDATTR             11      /* don't use named attributes */
#define NFS_MFLAG_NOACL                 12      /* don't support ACLs */
#define NFS_MFLAG_ACLONLY               13      /* only support ACLs - not mode */
#define NFS_MFLAG_NFC                   14      /* send NFC strings */
#define NFS_MFLAG_NOQUOTA               15      /* don't support QUOTA requests */
#define NFS_MFLAG_MNTUDP                16      /* MOUNT protocol should use UDP */
#define NFS_MFLAG_MNTQUICK              17      /* use short timeouts while mounting */
#define NFS_MFLAG_NOOPAQUE_AUTH         19      /* don't make the mount AUTH_OPAQUE. Used by V3 */
#define NFS_MFLAG_SKIP_RENEW            20      /* don't send OP_RENEW when no files are opened. Used by V4 */

/* Macros for packing and unpacking packed versions */
#define PVER2MAJOR(M) ((uint32_t)(((M) >> 16) & 0xffff))
#define PVER2MINOR(m) ((uint32_t)((m) & 0xffff))
#define VER2PVER(M, m) ((uint32_t)((M) << 16) | ((m) & 0xffff))

/* NFS advisory file locking modes */
#define NFS_LOCK_MODE_ENABLED           0       /* advisory file locking enabled */
#define NFS_LOCK_MODE_DISABLED          1       /* do not support advisory file locking */
#define NFS_LOCK_MODE_LOCAL             2       /* perform advisory file locking locally */

#define NFS_STRLEN_INT(str) \
	        (int)strnlen(str, INT_MAX)
#define NFS_UIO_ADDIOV(a_uio, a_baseaddr, a_length) \
	        assert(a_length <= UINT32_MAX); uio_addiov(a_uio, a_baseaddr, (uint32_t)(a_length));
#define NFS_BZERO(off, bytes) \
	do { \
	        uint32_t bytes32 = bytes > UINT32_MAX ? UINT32_MAX : (uint32_t)(bytes); \
	        bzero(off, bytes32); \
	        if (bytes > UINT32_MAX) { \
	                bzero(off + bytes32, (uint32_t)(bytes - UINT32_MAX)); \
	        } \
	} while(0);
#define NFS_ZFREE(zone, ptr) \
	do { \
	        if ((ptr)) { \
	                zfree((zone), (ptr)); \
	                (ptr) = NULL; \
	        } \
	} while (0); \

/* Supported encryption types for kerberos session keys */
typedef enum  nfs_supported_kerberos_etypes {
	NFS_DES3_CBC_SHA1_KD = 16,
	NFS_AES128_CTS_HMAC_SHA1_96 = 17,
	NFS_AES256_CTS_HMAC_SHA1_96 = 18
} nfs_supported_kerberos_etypes;

/* Structure to hold an array of kerberos enctypes to allow on a mount */
#define NFS_MAX_ETYPES 3
struct nfs_etype {
	uint32_t count;
	uint32_t selected;  /* index in etypes that is being used. Set to count if nothing has been selected */
	nfs_supported_kerberos_etypes etypes[NFS_MAX_ETYPES];
};

/*
 * Old-style arguments to mount NFS
 */
#define NFS_ARGSVERSION 6               /* change when nfs_args changes */
struct nfs_args {
	int             version;        /* args structure version number */
#ifdef KERNEL
	user32_addr_t addr;             /* file server address */
#else
	struct sockaddr *addr;          /* file server address */
#endif
	uint8_t         addrlen;        /* length of address */
	int             sotype;         /* Socket type */
	int             proto;          /* and Protocol */
#ifdef KERNEL
	user32_addr_t fh;               /* File handle to be mounted */
#else
	u_char          *fh;            /* File handle to be mounted */
#endif
	int             fhsize;         /* Size, in bytes, of fh */
	int             flags;          /* flags */
	int             wsize;          /* write size in bytes */
	int             rsize;          /* read size in bytes */
	int             readdirsize;    /* readdir size in bytes */
	int             timeo;          /* initial timeout in .1 secs */
	int             retrans;        /* times to retry send */
	int             maxgrouplist;   /* Max. size of group list */
	int             readahead;      /* # of blocks to readahead */
	int             leaseterm;      /* obsolete: Term (sec) of lease */
	int             deadthresh;     /* obsolete: Retrans threshold */
#ifdef KERNEL
	user32_addr_t hostname; /* server's name */
#else
	char            *hostname;      /* server's name */
#endif
	/* NFS_ARGSVERSION 3 ends here */
	int             acregmin;       /* reg file min attr cache timeout */
	int             acregmax;       /* reg file max attr cache timeout */
	int             acdirmin;       /* dir min attr cache timeout */
	int             acdirmax;       /* dir max attr cache timeout */
	/* NFS_ARGSVERSION 4 ends here */
	uint32_t        auth;           /* security mechanism flavor */
	/* NFS_ARGSVERSION 5 ends here */
	uint32_t        deadtimeout;    /* secs until unresponsive mount considered dead */
};

/* incremental size additions in each version of nfs_args */
#define NFS_ARGSVERSION4_INCSIZE        (4 * sizeof(int))
#define NFS_ARGSVERSION5_INCSIZE        (sizeof(uint32_t))
#define NFS_ARGSVERSION6_INCSIZE        (sizeof(uint32_t))

#ifdef KERNEL
/* LP64 version of nfs_args.  all pointers and longs
 * grow when we're dealing with a 64-bit process.
 * WARNING - keep in sync with nfs_args
 */
struct user_nfs_args {
	int             version;        /* args structure version number */
	user_addr_t     addr __attribute((aligned(8)));         /* file server address */
	uint8_t         addrlen;        /* length of address */
	int             sotype;         /* Socket type */
	int             proto;          /* and Protocol */
	user_addr_t     fh __attribute((aligned(8)));           /* File handle to be mounted */
	int             fhsize;         /* Size, in bytes, of fh */
	int             flags;          /* flags */
	int             wsize;          /* write size in bytes */
	int             rsize;          /* read size in bytes */
	int             readdirsize;    /* readdir size in bytes */
	int             timeo;          /* initial timeout in .1 secs */
	int             retrans;        /* times to retry send */
	int             maxgrouplist;   /* Max. size of group list */
	int             readahead;      /* # of blocks to readahead */
	int             leaseterm;      /* obsolete: Term (sec) of lease */
	int             deadthresh;     /* obsolete: Retrans threshold */
	user_addr_t     hostname __attribute((aligned(8)));     /* server's name */
	/* NFS_ARGSVERSION 3 ends here */
	int             acregmin;       /* reg file min attr cache timeout */
	int             acregmax;       /* reg file max attr cache timeout */
	int             acdirmin;       /* dir min attr cache timeout */
	int             acdirmax;       /* dir max attr cache timeout */
	/* NFS_ARGSVERSION 4 ends here */
	uint32_t        auth;           /* security mechanism flavor */
	/* NFS_ARGSVERSION 5 ends here */
	uint32_t        deadtimeout;    /* secs until unresponsive mount considered dead */
};
#endif // KERNEL

/*
 * Old-style NFS mount option flags
 */
#define NFSMNT_SOFT             0x00000001  /* soft mount (hard is default) */
#define NFSMNT_WSIZE            0x00000002  /* set write size */
#define NFSMNT_RSIZE            0x00000004  /* set read size */
#define NFSMNT_TIMEO            0x00000008  /* set initial timeout */
#define NFSMNT_RETRANS          0x00000010  /* set number of request retries */
#define NFSMNT_MAXGRPS          0x00000020  /* set maximum grouplist size */
#define NFSMNT_INT              0x00000040  /* allow interrupts on hard mount */
#define NFSMNT_NOCONN           0x00000080  /* Don't Connect the socket */
#define NFSMNT_NONEGNAMECACHE   0x00000100  /* Don't do negative name caching */
#define NFSMNT_NFSV3            0x00000200  /* Use NFS Version 3 protocol */
#define NFSMNT_NFSV4            0x00000400  /* Use NFS Version 4 protocol */
#define NFSMNT_DUMBTIMR         0x00000800  /* Don't estimate rtt dynamically */
#define NFSMNT_DEADTIMEOUT      0x00001000  /* unmount after a period of unresponsiveness */
#define NFSMNT_READAHEAD        0x00002000  /* set read ahead */
#define NFSMNT_CALLUMNT         0x00004000  /* call MOUNTPROC_UMNT on unmount */
#define NFSMNT_RESVPORT         0x00008000  /* Allocate a reserved port */
#define NFSMNT_RDIRPLUS         0x00010000  /* Use Readdirplus for V3 */
#define NFSMNT_READDIRSIZE      0x00020000  /* Set readdir size */
#define NFSMNT_NOLOCKS          0x00040000  /* don't support file locking */
#define NFSMNT_LOCALLOCKS       0x00080000  /* do file locking locally on client */
#define NFSMNT_ACREGMIN         0x00100000  /* reg min attr cache timeout */
#define NFSMNT_ACREGMAX         0x00200000  /* reg max attr cache timeout */
#define NFSMNT_ACDIRMIN         0x00400000  /* dir min attr cache timeout */
#define NFSMNT_ACDIRMAX         0x00800000  /* dir max attr cache timeout */
#define NFSMNT_SECFLAVOR        0x01000000  /* Use security flavor */
#define NFSMNT_SECSYSOK         0x02000000  /* Server can support auth sys */
#define NFSMNT_MUTEJUKEBOX      0x04000000  /* don't treat jukebox errors as unresponsive */
#define NFSMNT_NOQUOTA          0x08000000  /* don't support QUOTA requests */


/*
 * fs.nfs sysctl(3) NFS_MOUNTINFO defines
 */
#define NFS_MOUNT_INFO_VERSION  0       /* nfsstat mount information version */
#define NFS_MIATTR_BITMAP_LEN   1       /* length of mount info attributes bitmap */
#define NFS_MIFLAG_BITMAP_LEN   1       /* length of mount info flags bitmap */

/* NFS mount info attributes */
#define NFS_MIATTR_FLAGS                0       /* mount info flags bitmap (MIFLAG_*) */
#define NFS_MIATTR_ORIG_ARGS            1       /* original mount args passed into mount call */
#define NFS_MIATTR_CUR_ARGS             2       /* current mount args values */
#define NFS_MIATTR_CUR_LOC_INDEX        3       /* current fs location index */

/* NFS mount info flags */
#define NFS_MIFLAG_DEAD         0       /* mount is dead */
#define NFS_MIFLAG_NOTRESP      1       /* server is unresponsive */
#define NFS_MIFLAG_RECOVERY     2       /* mount in recovery */


/*
 * Structures for the nfssvc(2) syscall. Not that anyone but nfsd
 * should ever try and use it.
 */
struct nfsd_args {
	int     sock;           /* Socket to serve */
#ifdef KERNEL
	user32_addr_t   name;           /* Client addr for connection based sockets */
#else
	caddr_t name;           /* Client addr for connection based sockets */
#endif
	int     namelen;        /* Length of name */
};

#ifdef KERNEL
/* LP64 version of nfsd_args.  all pointers and longs
 * grow when we're dealing with a 64-bit process.
 * WARNING - keep in sync with nfsd_args
 */
struct user_nfsd_args {
	int             sock;           /* Socket to serve */
	user_addr_t     name __attribute((aligned(8)));         /* Client addr for connection based sockets */
	int             namelen;        /* Length of name */
};

#endif // KERNEL

/*
 * NFS Server File Handle structures
 */

/* NFS export handle identifies which NFS export */
#define NFS_FH_VERSION  0x4e580000              /* 'NX00' */
struct nfs_exphandle {
	uint32_t        nxh_version;            /* data structure version */
	uint32_t        nxh_fsid;               /* File System Export ID */
	uint32_t        nxh_expid;              /* Export ID */
	uint16_t        nxh_flags;              /* export handle flags */
	uint8_t         nxh_reserved;           /* future use */
	uint32_t        nxh_fidlen;             /* length of File ID */
};

/* nxh_flags */
#define NXHF_INVALIDFH          0x0001          /* file handle is invalid */

#define NFS_MAX_FID_SIZE        (NFS_MAX_FH_SIZE - sizeof(struct nfs_exphandle))
#define NFSV4_MAX_FID_SIZE      (NFSV4_MAX_FH_SIZE - sizeof(struct nfs_exphandle))
#define NFSV3_MAX_FID_SIZE      (NFSV3_MAX_FH_SIZE - sizeof(struct nfs_exphandle))
#define NFSV2_MAX_FID_SIZE      (NFSV2_MAX_FH_SIZE - sizeof(struct nfs_exphandle))

/* NFS server internal view of fhandle_t */
/* The first sizeof(fhandle_t) bytes must match what goes into fhandle_t. */
/* (fhp is used to allow use of an external buffer) */
struct nfs_filehandle {
	uint32_t                nfh_len;        /* total length of file handle */
	struct nfs_exphandle    nfh_xh;         /* export handle */
	unsigned char           nfh_fid[NFS_MAX_FID_SIZE]; /* File ID */
	unsigned char           *nfh_fhp;       /* pointer to file handle */
};

/*
 * NFS export data structures
 */

/* Structure to hold an array of security flavors */
#define NX_MAX_SEC_FLAVORS 5
struct nfs_sec {
	int count;
	uint32_t flavors[NX_MAX_SEC_FLAVORS];
};

struct nfs_export_net_args {
	uint32_t                nxna_flags;     /* export flags */
	struct xucred           nxna_cred;      /* mapped credential for root/all user */
	struct sockaddr_storage nxna_addr;      /* net address to which exported */
	struct sockaddr_storage nxna_mask;      /* mask for net address */
	struct nfs_sec          nxna_sec;       /* security mechanism flavors */
};

struct nfs_export_args {
	uint32_t                nxa_fsid;       /* export FS ID */
	uint32_t                nxa_expid;      /* export ID */
#ifdef KERNEL
	user32_addr_t           nxa_fspath;     /* export FS path */
	user32_addr_t           nxa_exppath;    /* export sub-path */
#else
	char                    *nxa_fspath;    /* export FS path */
	char                    *nxa_exppath;   /* export sub-path */
#endif
	uint32_t                nxa_flags;      /* export arg flags */
	uint32_t                nxa_netcount;   /* #entries in ex_nets array */
#ifdef KERNEL
	user32_addr_t           nxa_nets;       /* array of net args */
#else
	struct nfs_export_net_args *nxa_nets;   /* array of net args */
#endif
};

#ifdef KERNEL
/* LP64 version of export_args */

struct user_nfs_export_args {
	uint32_t                nxa_fsid;       /* export FS ID */
	uint32_t                nxa_expid;      /* export ID */
	user_addr_t             nxa_fspath;     /* export FS path */
	user_addr_t             nxa_exppath;    /* export sub-path */
	uint32_t                nxa_flags;      /* export arg flags */
	uint32_t                nxa_netcount;   /* #entries in ex_nets array */
	user_addr_t             nxa_nets;       /* array of net args */
};

#endif /* KERNEL */

/* nfs export arg flags */
#define NXA_DELETE              0x0001  /* delete the specified export(s) */
#define NXA_ADD                 0x0002  /* add the specified export(s) */
#define NXA_REPLACE             0x0003  /* delete and add the specified export(s) */
#define NXA_DELETE_ALL          0x0004  /* delete all exports */
#define NXA_OFFLINE             0x0008  /* export is offline */
#define NXA_CHECK               0x0010  /* check if exportable */

/* export option flags */
#define NX_READONLY             0x0001  /* exported read-only */
#define NX_DEFAULTEXPORT        0x0002  /* exported to the world */
#define NX_MAPROOT              0x0004  /* map root access to anon credential */
#define NX_MAPALL               0x0008  /* map all access to anon credential */
#define NX_32BITCLIENTS         0x0020  /* restrict directory cookies to 32 bits */
#define NX_OFFLINE              0x0040  /* export is offline */
#define NX_MANGLEDNAMES         0x0080  /* export will return mangled names for names > 255 bytes */

/*
 * fs.nfs sysctl(3) export stats record structures
 */
#define NFS_EXPORT_STAT_REC_VERSION 1   /* export stat record version */
#define NFS_USER_STAT_REC_VERSION 1     /* active user list record version */

/* descriptor describing following records */
struct nfs_export_stat_desc {
	uint32_t rec_vers;              /* version of export stat records */
	uint64_t rec_count;             /* total record count */
}__attribute__((__packed__));

/* export stat record containing path and stat counters */
struct nfs_export_stat_rec {
	char     path[RPCMNT_PATHLEN + 1];
	uint64_t ops;           /* Count of NFS Requests received for this export */
	uint64_t bytes_read;    /* Count of bytes read from this export */
	uint64_t bytes_written; /* Count of bytes written to this export */
}__attribute__((__packed__));

/* Active user list stat buffer descriptor */
struct nfs_user_stat_desc {
	uint32_t rec_vers;      /* version of active user stat records */
	uint32_t rec_count;     /* total record count */
}__attribute__((__packed__));

/* Active user list user stat record format */
struct nfs_user_stat_user_rec {
	u_char                  rec_type;
	uid_t                   uid;
	struct sockaddr_storage sock;
	uint64_t                ops;
	uint64_t                bytes_read;
	uint64_t                bytes_written;
	time_t                  tm_start;
	time_t                  tm_last;
}__attribute__((__packed__));

/* Active user list path record format */
struct nfs_user_stat_path_rec {
	u_char  rec_type;
	char    path[RPCMNT_PATHLEN + 1];
}__attribute__((__packed__));

/* Defines for rec_type field of
 * nfs_user_stat_rec & nfs_user_stat_rec
 * data structures
 */
#define NFS_USER_STAT_USER_REC  0
#define NFS_USER_STAT_PATH_REC  1


#ifdef XNU_KERNEL_PRIVATE
struct nfs_exportfs;

struct nfs_export_options {
	uint32_t                nxo_flags;      /* export options */
	kauth_cred_t            nxo_cred;       /* mapped credential */
	struct nfs_sec          nxo_sec;        /* security mechanism flavors */
};

/* Network address lookup element and individual export options */
struct nfs_netopt {
	struct radix_node               no_rnodes[2];   /* radix tree glue */
	struct nfs_export_options       no_opt;         /* export options */
	struct sockaddr                 *no_addr;       /* net address to which exported */
	struct sockaddr                 *no_mask;       /* mask for net address */
};

/* statistic counters for each exported directory
 *
 * Since 64-bit atomic operations are not available on 32-bit platforms,
 * 64-bit counters are implemented using 32-bit integers and 32-bit
 * atomic operations
 */
typedef struct nfsstatcount64 {
	uint32_t        hi;
	uint32_t        lo;
} nfsstatcount64;

struct nfs_export_stat_counters {
	struct nfsstatcount64 ops;              /* Count of NFS Requests received for this export  */
	struct nfsstatcount64 bytes_read;       /* Count of bytes read from this export */
	struct nfsstatcount64 bytes_written;    /* Count of bytes written to his export */
};

/* Macro for updating nfs export stat counters */
#define NFSStatAdd64(PTR, VAL) \
	do { \
	        uint32_t NFSSA_OldValue = \
	        OSAddAtomic((VAL), &(PTR)->lo); \
	        if ((NFSSA_OldValue + (VAL)) < NFSSA_OldValue) \
	                OSAddAtomic(1, &(PTR)->hi); \
	} while (0)

/* Some defines for dealing with active user list stats */
#define NFSRV_USER_STAT_DEF_MAX_NODES 1024      /* default active user list size limit */
#define NFSRV_USER_STAT_DEF_IDLE_SEC  7200      /* default idle seconds (node no longer considered active) */

/* active user list globals */
extern uint32_t nfsrv_user_stat_enabled;                /* enable/disable active user list */
extern uint32_t nfsrv_user_stat_node_count;             /* current count of user stat nodes */
extern uint32_t nfsrv_user_stat_max_idle_sec;   /* idle seconds (node no longer considered active) */
extern uint32_t nfsrv_user_stat_max_nodes;              /* active user list size limit */
extern lck_grp_t nfsrv_active_user_mutex_group;

/* An active user node represented in the kernel */
struct nfs_user_stat_node {
	TAILQ_ENTRY(nfs_user_stat_node) lru_link;
	LIST_ENTRY(nfs_user_stat_node)  hash_link;
	uid_t                   uid;
	struct sockaddr_storage sock;
	uint64_t                ops;
	uint64_t                bytes_read;
	uint64_t                bytes_written;
	time_t                  tm_start;
	time_t                  tm_last;
};

/* Hash table for active user nodes */
#define NFS_USER_STAT_HASH_SIZE 16      /* MUST be a power of 2 */
#define NFS_USER_STAT_HASH(userhashtbl, uid) \
	        &((userhashtbl)[(uid) & (NFS_USER_STAT_HASH_SIZE - 1)])

TAILQ_HEAD(nfs_user_stat_lru_head, nfs_user_stat_node);
LIST_HEAD(nfs_user_stat_hashtbl_head, nfs_user_stat_node);

/* Active user list data structure */
/* One per exported directory */
struct nfs_active_user_list {
	struct nfs_user_stat_lru_head           user_lru;
	struct nfs_user_stat_hashtbl_head       user_hashtbl[NFS_USER_STAT_HASH_SIZE];
	uint32_t                                node_count;
	lck_mtx_t user_mutex;
};


/* Network export information */
/* one of these for each exported directory */
struct nfs_export {
	LIST_ENTRY(nfs_export)          nx_next;        /* FS export list */
	LIST_ENTRY(nfs_export)          nx_hash;        /* export hash chain */
	struct nfs_export               *nx_parent;     /* parent export */
	uint32_t                        nx_id;          /* export ID */
	uint32_t                        nx_flags;       /* export flags */
	struct nfs_exportfs             *nx_fs;         /* exported file system */
	char                            *nx_path;       /* exported file system sub-path */
	struct nfs_filehandle           nx_fh;          /* export root file handle */
	struct nfs_export_options       nx_defopt;      /* default options */
	uint32_t                        nx_expcnt;      /* # exports in table */
	struct radix_node_head          *nx_rtable[AF_MAX + 1]; /* table of exports (netopts) */
	struct nfs_export_stat_counters nx_stats;       /* statistic counters for this exported directory */
	struct nfs_active_user_list     nx_user_list;   /* Active User List for this exported directory */
	struct timeval                  nx_exptime;     /* time of export for write verifier */
};

/* NFS exported file system info */
/* one of these for each exported file system */
struct nfs_exportfs {
	LIST_ENTRY(nfs_exportfs)        nxfs_next;      /* exported file system list */
	uint32_t                        nxfs_id;        /* exported file system ID */
	char                            *nxfs_path;     /* exported file system path */
	LIST_HEAD(, nfs_export)          nxfs_exports;   /* list of exports for this file system */
};

extern LIST_HEAD(nfsrv_expfs_list, nfs_exportfs) nfsrv_exports;
extern lck_rw_t nfsrv_export_rwlock;  // lock for export data structures
#define NFSRVEXPHASHSZ  64
#define NFSRVEXPHASHVAL(FSID, EXPID)    \
	(((FSID) >> 24) ^ ((FSID) >> 16) ^ ((FSID) >> 8) ^ (EXPID))
#define NFSRVEXPHASH(FSID, EXPID)       \
	(&nfsrv_export_hashtbl[NFSRVEXPHASHVAL((FSID),(EXPID)) & nfsrv_export_hash])
extern LIST_HEAD(nfsrv_export_hashhead, nfs_export) * nfsrv_export_hashtbl;
extern u_long nfsrv_export_hash;

#if CONFIG_FSE
/*
 * NFS server file mod fsevents
 */
struct nfsrv_fmod {
	LIST_ENTRY(nfsrv_fmod)  fm_link;
	vnode_t                 fm_vp;
	struct vfs_context      fm_context;
	uint64_t                fm_deadline;
};

#define NFSRVFMODHASHSZ 128
#define NFSRVFMODHASH(vp) (((uintptr_t) vp) & nfsrv_fmod_hash)
extern LIST_HEAD(nfsrv_fmod_hashhead, nfsrv_fmod) * nfsrv_fmod_hashtbl;
extern u_long nfsrv_fmod_hash;
extern lck_mtx_t nfsrv_fmod_mutex;
extern int nfsrv_fmod_pending, nfsrv_fsevents_enabled;
#endif

extern int nfsrv_async, nfsrv_export_hash_size, nfsrv_reqcache_size, nfsrv_sock_max_rec_queue_length;
extern uint32_t nfsrv_gss_context_ttl;
extern uint32_t nfsrv_unprocessed_rpc_current, nfsrv_unprocessed_rpc_max;

extern struct nfsrvstats nfsrvstats;
#define NFS_UC_Q_DEBUG
#ifdef NFS_UC_Q_DEBUG
extern int nfsrv_uc_use_proxy;
extern uint32_t nfsrv_uc_queue_limit;
extern uint32_t nfsrv_uc_queue_max_seen;
extern volatile uint32_t nfsrv_uc_queue_count;
#endif

#endif // XNU_KERNEL_PRIVATE

typedef struct nfserr_info {
	const char *    nei_name;
	const int       nei_error;
	const int       nei_index;
} nfserr_info_t;

/*
 * NFS Common Errors
 */
#define NFSERR_INFO_COMMON \
	{ "NFS_OK", NFS_OK, 0 }, \
	{ "ERR_PERM", NFSERR_PERM, 1 }, \
	{ "ERR_NOENT", NFSERR_NOENT, 2 }, \
	{ "ERR_IO", NFSERR_IO, 3 }, \
	{ "ERR_NXIO", NFSERR_NXIO, 4 }, \
	{ "ERR_ACCES", NFSERR_ACCES, 5 }, \
	{ "ERR_EXIST", NFSERR_EXIST, 6 }, \
	{ "ERR_XDEV", NFSERR_XDEV, 7 }, \
	{ "ERR_NODEV", NFSERR_NODEV, 8 }, \
	{ "ERR_NOTDIR", NFSERR_NOTDIR, 9 }, \
	{ "ERR_ISDIR", NFSERR_ISDIR, 10 }, \
	{ "ERR_INVAL", NFSERR_INVAL, 11 }, \
	{ "ERR_FBIG", NFSERR_FBIG, 12 }, \
	{ "ERR_NOSPC", NFSERR_NOSPC, 13 }, \
	{ "ERR_ROFS", NFSERR_ROFS, 14 }, \
	{ "ERR_MLINK", NFSERR_MLINK, 15 }, \
	{ "ERR_NAMETOL", NFSERR_NAMETOL, 16 }, \
	{ "ERR_NOTEMPTY", NFSERR_NOTEMPTY, 17 }, \
	{ "ERR_DQUOT", NFSERR_DQUOT, 18 }, \
	{ "ERR_STALE", NFSERR_STALE, 19 }, \
	{ "ERR_REMOTE", NFSERR_REMOTE, 20 }, \
	{ "ERR_WFLUSH", NFSERR_WFLUSH, 21 }, \
	{ "ERR_BADHANDLE", NFSERR_BADHANDLE, 22 }, \
	{ "ERR_NOT_SYNC", NFSERR_NOT_SYNC, 23 }, \
	{ "ERR_BAD_COOKIE", NFSERR_BAD_COOKIE, 24 }, \
	{ "ERR_NOTSUPP", NFSERR_NOTSUPP, 25 }, \
	{ "ERR_TOOSMALL", NFSERR_TOOSMALL, 26 }, \
	{ "ERR_SERVERFAULT", NFSERR_SERVERFAULT, 27 }, \
	{ "ERR_BADTYPE", NFSERR_BADTYPE, 28 }, \
	{ "ERR_DELAY", NFSERR_DELAY, 29 }

#define NFSERR_INFO_COMMON_SIZE 30

/*
 * NFSv4 Errors
 */
#define NFSERR_INFO_V4 \
	/* NFSv4 Errors */ \
	{ "ERR_SAME", NFSERR_SAME, 0 }, \
	{ "ERR_DENIED", NFSERR_DENIED, 1 }, \
	{ "ERR_EXPIRED", NFSERR_EXPIRED, 2 }, \
	{ "ERR_LOCKED", NFSERR_LOCKED, 3 }, \
	{ "ERR_GRACE", NFSERR_GRACE, 4 }, \
	{ "ERR_FHEXPIRED", NFSERR_FHEXPIRED, 5 }, \
	{ "ERR_SHARE_DENIED", NFSERR_SHARE_DENIED, 6 }, \
	{ "ERR_WRONGSEC", NFSERR_WRONGSEC, 7 }, \
	{ "ERR_CLID_INUSE", NFSERR_CLID_INUSE, 8 }, \
	{ "ERR_RESOURCE", NFSERR_RESOURCE, 9 }, \
	{ "ERR_MOVED", NFSERR_MOVED, 10 }, \
	{ "ERR_NOFILEHANDLE", NFSERR_NOFILEHANDLE, 11 }, \
	{ "ERR_MINOR_VERS_MISMATCH", NFSERR_MINOR_VERS_MISMATCH, 12 }, \
	{ "ERR_STALE_CLIENTID", NFSERR_STALE_CLIENTID, 13 }, \
	{ "ERR_STALE_STATEID", NFSERR_STALE_STATEID, 14 }, \
	{ "ERR_OLD_STATEID", NFSERR_OLD_STATEID, 15 }, \
	{ "ERR_BAD_STATEID", NFSERR_BAD_STATEID, 16 }, \
	{ "ERR_BAD_SEQID", NFSERR_BAD_SEQID, 17 }, \
	{ "ERR_NOT_SAME", NFSERR_NOT_SAME, 18 }, \
	{ "ERR_LOCK_RANGE", NFSERR_LOCK_RANGE, 19 }, \
	{ "ERR_SYMLINK", NFSERR_SYMLINK, 20 }, \
	{ "ERR_RESTOREFH", NFSERR_RESTOREFH, 21 }, \
	{ "ERR_LEASE_MOVED", NFSERR_LEASE_MOVED, 22 }, \
	{ "ERR_ATTRNOTSUPP", NFSERR_ATTRNOTSUPP, 23 }, \
	{ "ERR_NO_GRACE", NFSERR_NO_GRACE, 24 }, \
	{ "ERR_RECLAIM_BAD", NFSERR_RECLAIM_BAD, 25 }, \
	{ "ERR_RECLAIM_CONFLICT", NFSERR_RECLAIM_CONFLICT, 26 }, \
	{ "ERR_BADXDR", NFSERR_BADXDR, 27 }, \
	{ "ERR_LOCKS_HELD", NFSERR_LOCKS_HELD, 28 }, \
	{ "ERR_OPENMODE", NFSERR_OPENMODE, 29 }, \
	{ "ERR_BADOWNER", NFSERR_BADOWNER, 30 }, \
	{ "ERR_BADCHAR", NFSERR_BADCHAR, 31 }, \
	{ "ERR_BADNAME", NFSERR_BADNAME, 32 }, \
	{ "ERR_BAD_RANGE", NFSERR_BAD_RANGE, 33 }, \
	{ "ERR_LOCK_NOTSUPP", NFSERR_LOCK_NOTSUPP, 34 }, \
	{ "ERR_OP_ILLEGAL", NFSERR_OP_ILLEGAL, 35 }, \
	{ "ERR_DEADLOCK", NFSERR_DEADLOCK, 36 }, \
	{ "ERR_FILE_OPEN", NFSERR_FILE_OPEN, 37 }, \
	{ "ERR_ADMIN_REVOKED", NFSERR_ADMIN_REVOKED, 38 }, \
	{ "ERR_CB_PATH_DOWN", NFSERR_CB_PATH_DOWN, 39 } , \
	/* NFSv4.1 Errors */ \
	{ "ERR_BADIOMODE", NFSERR_BADIOMODE, 40} , \
	{ "ERR_BADLAYOUT", NFSERR_BADLAYOUT, 41 } , \
	{ "ERR_BADSESSIONDIGEST", NFSERR_BADSESSIONDIGEST, 42 } , \
	{ "ERR_BADSESSION", NFSERR_BADSESSION, 43 } , \
	{ "ERR_BADSLOT", NFSERR_BADSLOT, 44 } , \
	{ "ERR_COMPLETEALREADY", NFSERR_COMPLETEALREADY, 45 } , \
	{ "ERR_NOTBNDTOSESS", NFSERR_NOTBNDTOSESS, 46 } , \
	{ "ERR_DELEGALREADYWANT", NFSERR_DELEGALREADYWANT, 47 } , \
	{ "ERR_BACKCHANBUSY", NFSERR_BACKCHANBUSY, 48 } , \
	{ "ERR_LAYOUTTRYLATER", NFSERR_LAYOUTTRYLATER, 49 } , \
	{ "ERR_LAYOUTUNAVAIL", NFSERR_LAYOUTUNAVAIL, 50 } , \
	{ "ERR_NOMATCHLAYOUT", NFSERR_NOMATCHLAYOUT, 51 } , \
	{ "ERR_RECALLCONFLICT", NFSERR_RECALLCONFLICT, 52 } , \
	{ "ERR_UNKNLAYOUTTYPE", NFSERR_UNKNLAYOUTTYPE, 53 } , \
	{ "ERR_SEQMISORDERED", NFSERR_SEQMISORDERED, 54 } , \
	{ "ERR_SEQUENCEPOS", NFSERR_SEQUENCEPOS, 55 } , \
	{ "ERR_REQTOOBIG", NFSERR_REQTOOBIG, 56 } , \
	{ "ERR_REPTOOBIG", NFSERR_REPTOOBIG, 57 } , \
	{ "ERR_REPTOOBIGTOCACHE", NFSERR_REPTOOBIGTOCACHE, 58 } , \
	{ "ERR_RETRYUNCACHEDREP", NFSERR_RETRYUNCACHEDREP, 59 } , \
	{ "ERR_UNSAFECOMPOUND", NFSERR_UNSAFECOMPOUND, 60 } , \
	{ "ERR_TOOMANYOPS", NFSERR_TOOMANYOPS, 61 } , \
	{ "ERR_OPNOTINSESS", NFSERR_OPNOTINSESS, 62 } , \
	{ "ERR_HASHALGUNSUPP", NFSERR_HASHALGUNSUPP, 63 } , \
	{ "ERR_CLIENTIDBUSY", NFSERR_CLIENTIDBUSY, 64 } , \
	{ "ERR_PNFSIOHOLE", NFSERR_PNFSIOHOLE, 65 } , \
	{ "ERR_SEQFALSERETRY", NFSERR_SEQFALSERETRY, 66 } , \
	{ "ERR_BADHIGHSLOT", NFSERR_BADHIGHSLOT, 67 } , \
	{ "ERR_DEADSESSION", NFSERR_DEADSESSION, 68 } , \
	{ "ERR_ENCRALGUNSUPP", NFSERR_ENCRALGUNSUPP, 69 } , \
	{ "ERR_PNFSNOLAYOUT", NFSERR_PNFSNOLAYOUT, 70 } , \
	{ "ERR_NOTONLYOP", NFSERR_NOTONLYOP, 71 } , \
	{ "ERR_WRONGCRED", NFSERR_WRONGCRED, 72 } , \
	{ "ERR_WRONGTYPE", NFSERR_WRONGTYPE, 73 } , \
	{ "ERR_DIRDELEGUNAVAIL", NFSERR_DIRDELEGUNAVAIL, 74 } , \
	{ "ERR_REJECTDELEG", NFSERR_REJECTDELEG, 75 } , \
	{ "ERR_RETURNCONFLICT", NFSERR_RETURNCONFLICT, 76 } , \
	{ "ERR_DELEGREVOKED", NFSERR_DELEGREVOKED, 77 }

#define NFSERR_INFO_V4_SIZE     40
#define NFSERR_INFO_V41_SIZE    78

/*
 * XXX to allow amd to include nfs.h without nfsproto.h
 */
#ifdef NFS_NPROCS
/*
 * Stats structure
 */
struct nfsclntstats {
	uint64_t        attrcache_hits;
	uint64_t        attrcache_misses;
	uint64_t        lookupcache_hits;
	uint64_t        lookupcache_misses;
	uint64_t        direofcache_hits;
	uint64_t        direofcache_misses;
	uint64_t        accesscache_hits;
	uint64_t        accesscache_misses;
	uint64_t        biocache_reads;
	uint64_t        read_bios;
	uint64_t        read_physios;
	uint64_t        biocache_writes;
	uint64_t        write_bios;
	uint64_t        write_physios;
	uint64_t        biocache_readlinks;
	uint64_t        readlink_bios;
	uint64_t        biocache_readdirs;
	uint64_t        readdir_bios;
	uint64_t        rpccntv3[NFS_NPROCS];
	struct {
		uint64_t    nlm_lock;
		uint64_t    nlm_test;
		uint64_t    nlm_unlock;
	} nlmcnt; // NFSv3 only
	uint64_t        opcntv4[NFS_V41_OP_COUNT];
	uint64_t        cbopcntv4[NFS_V41_OP_CB_COUNT];
	uint64_t        rpcretries;
	uint64_t        rpcrequests;
	uint64_t        rpctimeouts;
	uint64_t        rpcunexpected;
	uint64_t        rpcinvalid;
	uint64_t        pageins;
	uint64_t        pageouts;
	struct {
		uint64_t    errs_common[NFSERR_INFO_COMMON_SIZE];
		uint64_t    errs_v4[NFSERR_INFO_V41_SIZE];
		uint64_t    errs_unknown;
	} nfs_errs;
};

struct nfsrvstats {
	uint64_t        srvrpccntv3[NFS_NPROCS];
	uint64_t        srvrpc_errs;
	uint64_t        srv_errs;
	uint64_t        srvcache_inproghits;
	uint64_t        srvcache_idemdonehits;
	uint64_t        srvcache_nonidemdonehits;
	uint64_t        srvcache_misses;
	uint64_t        srvvop_writes;
	struct {
		uint64_t    errs_common[NFSERR_INFO_COMMON_SIZE];
		uint64_t    errs_unknown;
	} nfs_errs;
};

#endif

/*
 * Flags for nfssvc() system call.
 */
#define NFSSVC_NFSD             0x004
#define NFSSVC_ADDSOCK          0x008
#define NFSSVC_EXPORTSTATS      0x010    /* gets exported directory stats */
#define NFSSVC_USERSTATS        0x020    /* gets exported directory active user stats */
#define NFSSVC_USERCOUNT        0x040    /* gets current count of active nfs users */
#define NFSSVC_ZEROSTATS        0x080    /* zero nfs server statistics */
#define NFSSVC_SRVSTATS         0x100    /* struct: struct nfsrvstats */
#define NFSSVC_EXPORT           0x200

/*
 * The structure that lockd hands the kernel for each lock answer.
 */
#define LOCKD_ANS_VERSION       2
struct lockd_ans {
	int             la_version;             /* lockd_ans version */
	int             la_errno;               /* return status */
	u_int64_t       la_xid;                 /* unique message transaction ID */
	int             la_flags;               /* answer flags */
	pid_t           la_pid;                 /* pid of lock requester/owner */
	off_t           la_start;               /* lock starting offset */
	off_t           la_len;                 /* lock length */
	int             la_fh_len;              /* The file handle length. */
	u_int8_t        la_fh[NFSV3_MAX_FH_SIZE];/* The file handle. */
};

/*
 * The structure that lockd hands the kernel for each notify.
 */
#define LOCKD_NOTIFY_VERSION    1
struct lockd_notify {
	int                     ln_version;             /* lockd_notify version */
	int                     ln_flags;               /* notify flags */
	int                     ln_pad;                 /* (for alignment) */
	int                     ln_addrcount;           /* # of addresss */
	struct sockaddr_storage *ln_addr;               /* List of addresses. */
};

#include <sys/_types/_guid_t.h> /* for guid_t below */
#define MAXIDNAMELEN            1024
struct nfs_testmapid {
	uint32_t                ntm_lookup;     /* lookup name 2 id or id 2 name */
	uint32_t                ntm_grpflag;    /* Is this a group or user maping */
	uint32_t                ntm_id;         /* id to map or return */
	uint32_t                pad;
	guid_t                  ntm_guid;       /* intermidiate guid used in conversion */
	char                    ntm_name[MAXIDNAMELEN]; /* name to map or return */
};

#define NTM_ID2NAME     0
#define NTM_NAME2ID     1
#define NTM_NAME2GUID   2
#define NTM_GUID2NAME   3

/*
 * Flags for nfsclnt() system call.
 */
#define NFSCLNT_LOCKDANS        _IOW('n', 101, struct lockd_ans)
#define NFSCLNT_LOCKDNOTIFY     _IOW('n', 102, struct lockd_notify)
#define NFSCLNT_TESTIDMAP       _IOWR('n', 103, struct nfs_testmapid)

/* nfsclnt() system call character device */
#define NFSCLNT_DEVICE         "nfsclnt"

/* nfsclnt() system call */
int nfsclnt(unsigned long request, void *argstructp);

/*
 * fs.nfs sysctl(3) identifiers
 */
#define NFS_NFSSTATS        1       /* struct: struct nfsclntstats */
#define NFS_MOUNTINFO       6       /* gets information about an NFS mount */
#define NFS_NFSZEROSTATS    7       /* zero nfs client statistics */

#ifndef NFS_WDELAYHASHSIZ
#define NFS_WDELAYHASHSIZ 16    /* and with this */
#endif

#ifdef KERNEL_PRIVATE

/* NFS hooks */

/* NFS hooks in struct */
struct nfs_hooks_in {
	int       (*f_vinvalbuf)(vnode_t, int, vfs_context_t, int);
	int       (*f_buf_page_inval)(vnode_t, off_t);
};

/* NFS hooks out struct */
struct nfs_hooks_out {
	void *    (*f_get_bsdthreadtask_info)(thread_t);
};

/* NFS hooks registration functions */
void nfs_register_hooks(struct nfs_hooks_in *, struct nfs_hooks_out *);
void nfs_unregister_hooks(void);

#ifdef XNU_KERNEL_PRIVATE

/* NFS hooks wrappers */
int           nfs_vinvalbuf(vnode_t, int, vfs_context_t, int);
int           nfs_buf_page_inval(vnode_t, off_t);

#endif /* XNU_KERNEL_PRIVATE */

/* Debug support */
#define __NFS_DEBUG_LEVEL(dbgctl)              ((dbgctl) & 0xf)
#define __NFS_DEBUG_FACILITY(dbgctl)           (((dbgctl) >> 4) & 0xfff)
#define __NFS_DEBUG_FLAGS(dbgctl)              (((dbgctl) >> 16) & 0xf)
#define __NFS_DEBUG_VALUE(dbgctl)              (((dbgctl) >> 20) & 0xfff)
#define __NFS_IS_DBG(dbgctl, fac, lev)         (__builtin_expect((__NFS_DEBUG_FACILITY(dbgctl) & (fac)) && ((lev) <= __NFS_DEBUG_LEVEL(dbgctl)), 0))
#define __NFS_DBG(dbgctl, fac, lev, fmt, ...)  nfs_printf((dbgctl), (fac), (lev), "%s: %d: " fmt, __func__, __LINE__, ## __VA_ARGS__)
void nfs_printf(unsigned int, unsigned int, unsigned int, const char *, ...) __printflike(4, 5);
void nfs_dump_mbuf(const char *, int, const char *, mbuf_t);

/*
 * NFS mbuf chain structure used for managing the building/dissection of RPCs
 */
struct nfsm_chain {
	mbuf_t          nmc_mhead;      /* mbuf chain head */
	mbuf_t          nmc_mcur;       /* current mbuf */
	caddr_t         nmc_ptr;        /* pointer into current mbuf */
	size_t          nmc_left;       /* bytes remaining in current mbuf */
	uint32_t        nmc_flags;      /* flags for this nfsm_chain */
};
#define NFSM_CHAIN_FLAG_ADD_CLUSTERS    0x1     /* always add mbuf clusters */

extern size_t nfs_mbuf_mhlen, nfs_mbuf_minclsize;

/*
 * Each retransmission of an RPCSEC_GSS request
 * has an additional sequence number.
 */
struct gss_seq {
	SLIST_ENTRY(gss_seq)    gss_seqnext;
	uint32_t                gss_seqnum;
};

#endif /* KERNEL_PRIVATE */

#ifdef XNU_KERNEL_PRIVATE

extern uint32_t nfsrv_debug_ctl;

/* Server debug support */
#define NFSRV_FAC_GSS                    0x001
#define NFSRV_FAC_SRV                    0x002
#define NFSRV_DEBUG_LEVEL                __NFS_DEBUG_LEVEL(nfsrv_debug_ctl)
#define NFSRV_DEBUG_FACILITY             __NFS_DEBUG_FACILITY(nfsrv_debug_ctl)
#define NFSRV_DEBUG_FLAGS                __NFS_DEBUG_FLAGS(nfsrv_debug_ctl)
#define NFSRV_DEBUG_VALUE                __NFS_DEBUG_VALUE(nfsrv_debug_ctl)
#define NFSRV_IS_DBG(fac, lev)           __NFS_IS_DBG(nfsrv_debug_ctl, fac, lev)
#define NFSRV_DBG(fac, lev, fmt, ...)    __NFS_DBG(nfsrv_debug_ctl, fac, lev, fmt, ## __VA_ARGS__)

#ifdef MALLOC_DECLARE
MALLOC_DECLARE(M_NFSD);
#endif

struct nameidata;
struct nfsrv_uc_arg;

/*
 * One nfsrv_sock structure is maintained for each socket the
 * server is servicing requests on.
 */
struct nfsrv_sock {
	TAILQ_ENTRY(nfsrv_sock) ns_chain;       /* List of all nfsrv_sock's */
	TAILQ_ENTRY(nfsrv_sock) ns_svcq;        /* List of sockets needing servicing */
	TAILQ_ENTRY(nfsrv_sock) ns_wgq;         /* List of sockets with a pending write gather */
	struct nfsrv_uc_arg *ns_ua;             /* Opaque pointer to upcall */
	lck_rw_t        ns_rwlock;              /* lock for most fields */
	socket_t        ns_so;
	mbuf_t          ns_nam;
	mbuf_t          ns_raw;
	mbuf_t          ns_rawend;
	mbuf_t          ns_rec;
	mbuf_t          ns_recend;
	mbuf_t          ns_frag;
	int             ns_flag;
	int             ns_sotype;
	size_t          ns_cc;
	u_int32_t       ns_reclen;              /* Unprocessed RPC record length */
	u_int32_t       ns_recslen;             /* Total unprocessed RPC records length */
	int             ns_reccnt;
	u_int32_t       ns_sref;
	time_t          ns_timestamp;           /* socket timestamp */
	lck_mtx_t       ns_wgmutex;             /* mutex for write gather fields */
	time_t          ns_wgtime;              /* next Write deadline (usec) */
	LIST_HEAD(, nfsrv_descript) ns_tq;      /* Write gather lists */
	LIST_HEAD(nfsrv_wg_delayhash, nfsrv_descript) ns_wdelayhashtbl[NFS_WDELAYHASHSIZ];
};

/* Bits for "ns_flag" */
#define SLP_VALID       0x0001 /* nfs sock valid */
#define SLP_DOREC       0x0002 /* nfs sock has received data to process */
#define SLP_NEEDQ       0x0004 /* network socket has data to receive */
#define SLP_DISCONN     0x0008 /* socket needs to be zapped */
#define SLP_GETSTREAM   0x0010 /* currently in nfsrv_getstream() */
#define SLP_LASTFRAG    0x0020 /* on last fragment of RPC record */
#define SLP_DOWRITES    0x0040 /* nfs sock has gathered writes to service */
#define SLP_WORKTODO    0x004e /* mask of all "work to do" flags */
#define SLP_ALLFLAGS    0x007f
#define SLP_WAITQ       0x4000 /* nfs sock is on the wait queue */
#define SLP_WORKQ       0x8000 /* nfs sock is on the work queue */
#define SLP_QUEUED      0xc000 /* nfs sock is on a queue */

#define SLPNOLIST ((struct nfsrv_sock *)0xdeadbeef)     /* sentinel value for sockets not in the nfsrv_sockwg list */

extern struct nfsrv_sock *nfsrv_udpsock, *nfsrv_udp6sock;

/*
 * global NFS server socket lists:
 *
 * nfsrv_socklist - list of all sockets (ns_chain)
 * nfsrv_sockwait - sockets w/new data waiting to be worked on (ns_svcq)
 * nfsrv_sockwork - sockets being worked on which may have more work to do (ns_svcq)
 * nfsrv_sockwg - sockets with pending write gather input (ns_wgq)
 */
extern TAILQ_HEAD(nfsrv_sockhead, nfsrv_sock) nfsrv_socklist, nfsrv_sockwg,
nfsrv_sockwait, nfsrv_sockwork;

/* lock groups for nfsrv_sock's */
extern lck_grp_t nfsrv_slp_rwlock_group;
extern lck_grp_t nfsrv_slp_mutex_group;

/*
 * One of these structures is allocated for each nfsd.
 */
struct nfsd {
	TAILQ_ENTRY(nfsd)       nfsd_chain;     /* List of all nfsd's */
	TAILQ_ENTRY(nfsd)       nfsd_queue;     /* List of waiting nfsd's */
	int                     nfsd_flag;      /* NFSD_ flags */
	struct nfsrv_sock       *nfsd_slp;      /* Current socket */
	struct nfsrv_descript   *nfsd_nd;       /* Associated nfsrv_descript */
};

/* Bits for "nfsd_flag" */
#define NFSD_WAITING    0x01
#define NFSD_REQINPROG  0x02

/*
 * This structure is used by the server for describing each request.
 * Some fields are used only when write request gathering is performed.
 */
struct nfsrv_descript {
	time_t                  nd_time;        /* Write deadline (usec) */
	off_t                   nd_off;         /* Start byte offset */
	off_t                   nd_eoff;        /* and end byte offset */
	LIST_ENTRY(nfsrv_descript) nd_hash;     /* Hash list */
	LIST_ENTRY(nfsrv_descript) nd_tq;       /* and timer list */
	LIST_HEAD(, nfsrv_descript) nd_coalesce; /* coalesced writes */
	struct nfsm_chain       nd_nmreq;       /* Request mbuf chain */
	mbuf_t                  nd_mrep;        /* Reply mbuf list (WG) */
	mbuf_t                  nd_nam;         /* and socket addr */
	mbuf_t                  nd_nam2;        /* return socket addr */
	u_int32_t               nd_procnum;     /* RPC # */
	int                     nd_stable;      /* storage type */
	int                     nd_vers;        /* NFS version */
	int                     nd_len;         /* Length of this write */
	int                     nd_repstat;     /* Reply status */
	u_int32_t               nd_retxid;      /* Reply xid */
	struct timeval          nd_starttime;   /* Time RPC initiated */
	struct nfs_filehandle   nd_fh;          /* File handle */
	uint32_t                nd_sec;         /* Security flavor */
	struct nfs_gss_svc_ctx  *nd_gss_context;/* RPCSEC_GSS context */
	uint32_t                nd_gss_seqnum;  /* RPCSEC_GSS seq num */
	mbuf_t                  nd_gss_mb;      /* RPCSEC_GSS results mbuf */
	kauth_cred_t            nd_cr;          /* Credentials */
};

extern TAILQ_HEAD(nfsd_head, nfsd) nfsd_head, nfsd_queue;

typedef int (*nfsrv_proc_t)(struct nfsrv_descript *, struct nfsrv_sock *,
    vfs_context_t, mbuf_t *);

/* mutex for nfs server */
extern lck_mtx_t nfsd_mutex;
extern int nfsd_thread_count, nfsd_thread_max;

/* nfs timer call structures */
extern thread_call_t    nfsrv_idlesock_timer_call;
#if CONFIG_FSE
extern thread_call_t    nfsrv_fmod_timer_call;
#endif

__BEGIN_DECLS

nfstype vtonfs_type(enum vtype, int);
enum vtype nfstov_type(nfstype, int);
int     vtonfsv2_mode(enum vtype, mode_t);

void    nfs_mbuf_init(void);

int     nfs_sockaddr_cmp(struct sockaddr *, struct sockaddr *);

void    nfsrv_active_user_list_reclaim(void);
void    nfsrv_cleancache(void);
void    nfsrv_cleanup(void);
int     nfsrv_credcheck(struct nfsrv_descript *, vfs_context_t, struct nfs_export *,
    struct nfs_export_options *);
void    nfsrv_idlesock_timer(void *, void *);
int     nfsrv_dorec(struct nfsrv_sock *, struct nfsd *, struct nfsrv_descript **);
int     nfsrv_errmap(struct nfsrv_descript *, int);
int     nfsrv_export(struct user_nfs_export_args *, vfs_context_t);
int     nfsrv_fhmatch(struct nfs_filehandle *, struct nfs_filehandle *);
int     nfsrv_fhtovp(struct nfs_filehandle *, struct nfsrv_descript *, vnode_t *,
    struct nfs_export **, struct nfs_export_options **);
int     nfsrv_check_exports_allow_address(mbuf_t);
#if CONFIG_FSE
void    nfsrv_fmod_timer(void *, void *);
#endif
int     nfsrv_getcache(struct nfsrv_descript *, struct nfsrv_sock *, mbuf_t *);
void    nfsrv_group_sort(gid_t *, int);
void    nfsrv_init(void);
void    nfsrv_initcache(void);
int     nfsrv_is_initialized(void);
int     nfsrv_namei(struct nfsrv_descript *, vfs_context_t, struct nameidata *,
    struct nfs_filehandle *, vnode_t *,
    struct nfs_export **, struct nfs_export_options **);
void    nfsrv_rcv(socket_t, void *, int);
void    nfsrv_rcv_locked(socket_t, struct nfsrv_sock *, int);
int     nfsrv_rephead(struct nfsrv_descript *, struct nfsrv_sock *, struct nfsm_chain *, size_t);
int     nfsrv_send(struct nfsrv_sock *, mbuf_t, mbuf_t);
void    nfsrv_updatecache(struct nfsrv_descript *, int, mbuf_t);
void    nfsrv_update_user_stat(struct nfs_export *, struct nfsrv_descript *, uid_t, u_int, u_int, u_int);
int     nfsrv_vptofh(struct nfs_export *, int, struct nfs_filehandle *,
    vnode_t, vfs_context_t, struct nfs_filehandle *);
void    nfsrv_wakenfsd(struct nfsrv_sock *);
void    nfsrv_wg_timer(void *, void *);
int     nfsrv_writegather(struct nfsrv_descript **, struct nfsrv_sock *,
    vfs_context_t, mbuf_t *);

int     nfsrv_access(struct nfsrv_descript *, struct nfsrv_sock *, vfs_context_t, mbuf_t *);
int     nfsrv_commit(struct nfsrv_descript *, struct nfsrv_sock *, vfs_context_t, mbuf_t *);
int     nfsrv_create(struct nfsrv_descript *, struct nfsrv_sock *, vfs_context_t, mbuf_t *);
int     nfsrv_fsinfo(struct nfsrv_descript *, struct nfsrv_sock *, vfs_context_t, mbuf_t *);
int     nfsrv_getattr(struct nfsrv_descript *, struct nfsrv_sock *, vfs_context_t, mbuf_t *);
int     nfsrv_link(struct nfsrv_descript *, struct nfsrv_sock *, vfs_context_t, mbuf_t *);
int     nfsrv_lookup(struct nfsrv_descript *, struct nfsrv_sock *, vfs_context_t, mbuf_t *);
int     nfsrv_mkdir(struct nfsrv_descript *, struct nfsrv_sock *, vfs_context_t, mbuf_t *);
int     nfsrv_mknod(struct nfsrv_descript *, struct nfsrv_sock *, vfs_context_t, mbuf_t *);
int     nfsrv_noop(struct nfsrv_descript *, struct nfsrv_sock *, vfs_context_t, mbuf_t *);
int     nfsrv_null(struct nfsrv_descript *, struct nfsrv_sock *, vfs_context_t, mbuf_t *);
int     nfsrv_pathconf(struct nfsrv_descript *, struct nfsrv_sock *, vfs_context_t, mbuf_t *);
int     nfsrv_read(struct nfsrv_descript *, struct nfsrv_sock *, vfs_context_t, mbuf_t *);
int     nfsrv_readdir(struct nfsrv_descript *, struct nfsrv_sock *, vfs_context_t, mbuf_t *);
int     nfsrv_readdirplus(struct nfsrv_descript *, struct nfsrv_sock *, vfs_context_t, mbuf_t *);
int     nfsrv_readlink(struct nfsrv_descript *, struct nfsrv_sock *, vfs_context_t, mbuf_t *);
int     nfsrv_remove(struct nfsrv_descript *, struct nfsrv_sock *, vfs_context_t, mbuf_t *);
int     nfsrv_rename(struct nfsrv_descript *, struct nfsrv_sock *, vfs_context_t, mbuf_t *);
int     nfsrv_rmdir(struct nfsrv_descript *, struct nfsrv_sock *, vfs_context_t, mbuf_t *);
int     nfsrv_setattr(struct nfsrv_descript *, struct nfsrv_sock *, vfs_context_t, mbuf_t *);
int     nfsrv_statfs(struct nfsrv_descript *, struct nfsrv_sock *, vfs_context_t, mbuf_t *);
int     nfsrv_symlink(struct nfsrv_descript *, struct nfsrv_sock *, vfs_context_t, mbuf_t *);
int     nfsrv_write(struct nfsrv_descript *, struct nfsrv_sock *, vfs_context_t, mbuf_t *);

void    nfs_interval_timer_start(thread_call_t, time_t);

/* socket upcall interfaces */
void nfsrv_uc_init(void);
void nfsrv_uc_cleanup(void);
void nfsrv_uc_addsock(struct nfsrv_sock *, int);
void nfsrv_uc_dequeue(struct nfsrv_sock *);

#include <kern/kalloc.h>

extern zone_t nfsrv_descript_zone;

__END_DECLS
#endif /* XNU_KERNEL_PRIVATE */

#endif /* __APPLE_API_PRIVATE */

#endif
