FreeBSD/Linux Kernel Cross Reference
sys/fs/nfs/nfsport.h

     /*-
      * Copyright (c) 1989, 1993
      *      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.
     * 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.
     *
     * $FreeBSD$
     */
    
    #ifndef _NFS_NFSPORT_H_
    #define _NFS_NFSPORT_H_
    
    /*
     * In general, I'm not fond of #includes in .h files, but this seems
     * to be the cleanest way to handle #include files for the ports.
     */
    #ifdef _KERNEL
    #include <sys/unistd.h>
    #include <sys/param.h>
    #include <sys/systm.h>
    #include <sys/conf.h>
    #include <sys/dirent.h>
    #include <sys/domain.h>
    #include <sys/fcntl.h>
    #include <sys/file.h>
    #include <sys/filedesc.h>
    #include <sys/jail.h>
    #include <sys/kernel.h>
    #include <sys/lockf.h>
    #include <sys/malloc.h>
    #include <sys/mbuf.h>
    #include <sys/mount.h>
    #include <sys/namei.h>
    #include <sys/proc.h>
    #include <sys/protosw.h>
    #include <sys/reboot.h>
    #include <sys/resourcevar.h>
    #include <sys/signalvar.h>
    #include <sys/socket.h>
    #include <sys/socketvar.h>
    #include <sys/stat.h>
    #include <sys/syslog.h>
    #include <sys/sysproto.h>
    #include <sys/time.h>
    #include <sys/uio.h>
    #include <sys/vnode.h>
    #include <sys/bio.h>
    #include <sys/buf.h>
    #include <sys/acl.h>
    #include <sys/module.h>
    #include <sys/sysent.h>
    #include <sys/syscall.h>
    #include <sys/priv.h>
    #include <sys/kthread.h>
    #include <sys/syscallsubr.h>
    #include <fs/fifofs/fifo.h>
    #include <net/if.h>
    #include <net/radix.h>
    #include <net/route.h>
    #include <net/if_dl.h>
    #include <netinet/in.h>
    #include <netinet/in_pcb.h>
    #include <netinet/in_systm.h>
    #include <netinet/in_var.h>
    #include <netinet/ip.h>
    #include <netinet/ip_var.h>
    #include <netinet/tcp.h>
    #include <netinet/tcp_fsm.h>
    #include <netinet/tcp_seq.h>
    #include <netinet/tcp_timer.h>
    #include <netinet/tcp_var.h>
    #include <machine/in_cksum.h>
    #include <crypto/des/des.h>
    #include <sys/md5.h>
   #include <rpc/rpc.h>
   #include <rpc/rpcsec_gss.h>
   
   /*
    * For Darwin, these functions should be "static" when built in a kext.
    * (This is always defined as nil otherwise.)
    */
   #define APPLESTATIC
   #include <ufs/ufs/dir.h>
   #include <ufs/ufs/quota.h>
   #include <ufs/ufs/inode.h>
   #include <ufs/ufs/extattr.h>
   #include <ufs/ufs/ufsmount.h>
   #include <vm/uma.h>
   #include <vm/vm.h>
   #include <vm/vm_object.h>
   #include <vm/vm_extern.h>
   #include <nfs/nfssvc.h>
   #include "opt_nfs.h"
   #include "opt_ufs.h"
   
   /*
    * These types must be defined before the nfs includes.
    */
   #define NFSSOCKADDR_T   struct sockaddr *
   #define NFSPROC_T       struct thread
   #define NFSDEV_T        dev_t
   #define NFSSVCARGS      nfssvc_args
   #define NFSACL_T        struct acl
   
   /*
    * These should be defined as the types used for the corresponding VOP's
    * argument type.
    */
   #define NFS_ACCESS_ARGS         struct vop_access_args
   #define NFS_OPEN_ARGS           struct vop_open_args
   #define NFS_GETATTR_ARGS        struct vop_getattr_args
   #define NFS_LOOKUP_ARGS         struct vop_lookup_args
   #define NFS_READDIR_ARGS        struct vop_readdir_args
   
   /*
    * Allocate mbufs. Must succeed and never set the mbuf ptr to NULL.
    */
   #define NFSMGET(m)      do {                                    \
                   MGET((m), M_TRYWAIT, MT_DATA);                  \
                   while ((m) == NULL ) {                          \
                           (void) nfs_catnap(PZERO, 0, "nfsmget"); \
                           MGET((m), M_TRYWAIT, MT_DATA);          \
                   }                                               \
           } while (0)
   #define NFSMGETHDR(m)   do {                                    \
                   MGETHDR((m), M_TRYWAIT, MT_DATA);               \
                   while ((m) == NULL ) {                          \
                           (void) nfs_catnap(PZERO, 0, "nfsmget"); \
                           MGETHDR((m), M_TRYWAIT, MT_DATA);       \
                   }                                               \
           } while (0)
   #define NFSMCLGET(m, w) do {                                    \
                   MGET((m), M_TRYWAIT, MT_DATA);                  \
                   while ((m) == NULL ) {                          \
                           (void) nfs_catnap(PZERO, 0, "nfsmget"); \
                           MGET((m), M_TRYWAIT, MT_DATA);          \
                   }                                               \
                   MCLGET((m), (w));                               \
           } while (0)
   #define NFSMCLGETHDR(m, w) do {                                 \
                   MGETHDR((m), M_TRYWAIT, MT_DATA);               \
                   while ((m) == NULL ) {                          \
                           (void) nfs_catnap(PZERO, 0, "nfsmget"); \
                           MGETHDR((m), M_TRYWAIT, MT_DATA);       \
                   }                                               \
           } while (0)
   #define NFSMTOD mtod
   
   /*
    * Client side constant for size of a lockowner name.
    */
   #define NFSV4CL_LOCKNAMELEN     12
   
   /*
    * Type for a mutex lock.
    */
   #define NFSMUTEX_T              struct mtx
   
   #endif  /* _KERNEL */
   
   /*
    * NFSv4 Operation numbers.
    */
   #define NFSV4OP_ACCESS          3
   #define NFSV4OP_CLOSE           4
   #define NFSV4OP_COMMIT          5
   #define NFSV4OP_CREATE          6
   #define NFSV4OP_DELEGPURGE      7
   #define NFSV4OP_DELEGRETURN     8
   #define NFSV4OP_GETATTR         9
   #define NFSV4OP_GETFH           10
   #define NFSV4OP_LINK            11
   #define NFSV4OP_LOCK            12
   #define NFSV4OP_LOCKT           13
   #define NFSV4OP_LOCKU           14
   #define NFSV4OP_LOOKUP          15
   #define NFSV4OP_LOOKUPP         16
   #define NFSV4OP_NVERIFY         17
   #define NFSV4OP_OPEN            18
   #define NFSV4OP_OPENATTR        19
   #define NFSV4OP_OPENCONFIRM     20
   #define NFSV4OP_OPENDOWNGRADE   21
   #define NFSV4OP_PUTFH           22
   #define NFSV4OP_PUTPUBFH        23
   #define NFSV4OP_PUTROOTFH       24
   #define NFSV4OP_READ            25
   #define NFSV4OP_READDIR         26
   #define NFSV4OP_READLINK        27
   #define NFSV4OP_REMOVE          28
   #define NFSV4OP_RENAME          29
   #define NFSV4OP_RENEW           30
   #define NFSV4OP_RESTOREFH       31
   #define NFSV4OP_SAVEFH          32
   #define NFSV4OP_SECINFO         33
   #define NFSV4OP_SETATTR         34
   #define NFSV4OP_SETCLIENTID     35
   #define NFSV4OP_SETCLIENTIDCFRM 36
   #define NFSV4OP_VERIFY          37
   #define NFSV4OP_WRITE           38
   #define NFSV4OP_RELEASELCKOWN   39
   
   /*
    * Must be one greater than the last Operation#.
    */
   #define NFSV4OP_NOPS            40
   
   /* Quirky case if the illegal op code */
   #define NFSV4OP_OPILLEGAL       10044
   
   /*
    * Fake NFSV4OP_xxx used for nfsstat. Start at NFSV4OP_NOPS.
    */
   #define NFSV4OP_SYMLINK         (NFSV4OP_NOPS)
   #define NFSV4OP_MKDIR           (NFSV4OP_NOPS + 1)
   #define NFSV4OP_RMDIR           (NFSV4OP_NOPS + 2)
   #define NFSV4OP_READDIRPLUS     (NFSV4OP_NOPS + 3)
   #define NFSV4OP_MKNOD           (NFSV4OP_NOPS + 4)
   #define NFSV4OP_FSSTAT          (NFSV4OP_NOPS + 5)
   #define NFSV4OP_FSINFO          (NFSV4OP_NOPS + 6)
   #define NFSV4OP_PATHCONF        (NFSV4OP_NOPS + 7)
   #define NFSV4OP_V3CREATE        (NFSV4OP_NOPS + 8)
   
   /*
    * This is the count of the fake operations listed above.
    */
   #define NFSV4OP_FAKENOPS        9
   
   /*
    * and the Callback OPs
    */
   #define NFSV4OP_CBGETATTR       3
   #define NFSV4OP_CBRECALL        4
   
   /*
    * Must be one greater than the last Callback Operation#.
    */
   #define NFSV4OP_CBNOPS          5
   
   /*
    * The lower numbers -> 21 are used by NFSv2 and v3. These define higher
    * numbers used by NFSv4.
    * NFS_V3NPROCS is one greater than the last V3 op and NFS_NPROCS is
    * one greater than the last number.
    */
   #ifndef NFS_V3NPROCS
   #define NFS_V3NPROCS            22
   
   #define NFSPROC_LOOKUPP         22
   #define NFSPROC_SETCLIENTID     23
   #define NFSPROC_SETCLIENTIDCFRM 24
   #define NFSPROC_LOCK            25
   #define NFSPROC_LOCKU           26
   #define NFSPROC_OPEN            27
   #define NFSPROC_CLOSE           28
   #define NFSPROC_OPENCONFIRM     29
   #define NFSPROC_LOCKT           30
   #define NFSPROC_OPENDOWNGRADE   31
   #define NFSPROC_RENEW           32
   #define NFSPROC_PUTROOTFH       33
   #define NFSPROC_RELEASELCKOWN   34
   #define NFSPROC_DELEGRETURN     35
   #define NFSPROC_RETDELEGREMOVE  36
   #define NFSPROC_RETDELEGRENAME1 37
   #define NFSPROC_RETDELEGRENAME2 38
   #define NFSPROC_GETACL          39
   #define NFSPROC_SETACL          40
   
   /*
    * Must be defined as one higher than the last Proc# above.
    */
   #define NFSV4_NPROCS            41
   #endif  /* NFS_V3NPROCS */
   
   /*
    * Stats structure
    */
   struct ext_nfsstats {
           int     attrcache_hits;
           int     attrcache_misses;
           int     lookupcache_hits;
           int     lookupcache_misses;
           int     direofcache_hits;
           int     direofcache_misses;
           int     accesscache_hits;
           int     accesscache_misses;
           int     biocache_reads;
           int     read_bios;
           int     read_physios;
           int     biocache_writes;
           int     write_bios;
           int     write_physios;
           int     biocache_readlinks;
           int     readlink_bios;
           int     biocache_readdirs;
           int     readdir_bios;
           int     rpccnt[NFSV4_NPROCS];
           int     rpcretries;
           int     srvrpccnt[NFSV4OP_NOPS + NFSV4OP_FAKENOPS];
           int     srvrpc_errs;
           int     srv_errs;
           int     rpcrequests;
           int     rpctimeouts;
           int     rpcunexpected;
           int     rpcinvalid;
           int     srvcache_inproghits;
           int     srvcache_idemdonehits;
           int     srvcache_nonidemdonehits;
           int     srvcache_misses;
           int     srvcache_tcppeak;
           int     srvcache_size;
           int     srvclients;
           int     srvopenowners;
           int     srvopens;
           int     srvlockowners;
           int     srvlocks;
           int     srvdelegates;
           int     cbrpccnt[NFSV4OP_CBNOPS];
           int     clopenowners;
           int     clopens;
           int     cllockowners;
           int     cllocks;
           int     cldelegates;
           int     cllocalopenowners;
           int     cllocalopens;
           int     cllocallockowners;
           int     cllocallocks;
   };
   
   #ifdef _KERNEL
   /*
    * Define the ext_nfsstats as nfsstats for the kernel code.
    */
   #define nfsstats        ext_nfsstats
   
   /*
    * Define NFS_NPROCS as NFSV4_NPROCS for the experimental kernel code.
    */
   #ifndef NFS_NPROCS
   #define NFS_NPROCS              NFSV4_NPROCS
   #endif
   
   #include <fs/nfs/nfskpiport.h>
   #include <fs/nfs/nfsdport.h>
   #include <fs/nfs/rpcv2.h>
   #include <fs/nfs/nfsproto.h>
   #include <fs/nfs/nfs.h>
   #include <fs/nfs/nfs_var.h>
   #include <fs/nfs/nfsm_subs.h>
   #include <fs/nfs/nfsrvcache.h>
   #include <fs/nfs/nfsrvstate.h>
   #include <fs/nfs/xdr_subs.h>
   #include <fs/nfs/nfscl.h>
   #include <fs/nfs/nfsclstate.h>
   #include <nfsclient/nfsargs.h>
   #include <fs/nfsclient/nfsmount.h>
   
   /*
    * Just to keep nfs_var.h happy.
    */
   struct nfs_vattr {
           int     junk;
   };
   
   struct nfsvattr {
           struct vattr    na_vattr;
           nfsattrbit_t    na_suppattr;
           u_int32_t       na_mntonfileno;
           u_int64_t       na_filesid[2];
   };
   
   #define na_type         na_vattr.va_type
   #define na_mode         na_vattr.va_mode
   #define na_nlink        na_vattr.va_nlink
   #define na_uid          na_vattr.va_uid
   #define na_gid          na_vattr.va_gid
   #define na_fsid         na_vattr.va_fsid
   #define na_fileid       na_vattr.va_fileid
   #define na_size         na_vattr.va_size
   #define na_blocksize    na_vattr.va_blocksize
   #define na_atime        na_vattr.va_atime
   #define na_mtime        na_vattr.va_mtime
   #define na_ctime        na_vattr.va_ctime
   #define na_gen          na_vattr.va_gen
   #define na_flags        na_vattr.va_flags
   #define na_rdev         na_vattr.va_rdev
   #define na_bytes        na_vattr.va_bytes
   #define na_filerev      na_vattr.va_filerev
   #define na_vaflags      na_vattr.va_vaflags
   
   #include <fs/nfsclient/nfsnode.h>
   
   /*
    * This is the header structure used for the lists, etc. (It has the
    * above record in it.
    */
   struct nfsrv_stablefirst {
           LIST_HEAD(, nfsrv_stable) nsf_head;     /* Head of nfsrv_stable list */
           time_t          nsf_eograce;    /* Time grace period ends */
           time_t          *nsf_bootvals;  /* Previous boottime values */
           struct file     *nsf_fp;        /* File table pointer */
           u_char          nsf_flags;      /* NFSNSF_ flags */
           struct nfsf_rec nsf_rec;        /* and above first record */
   };
   #define nsf_lease       nsf_rec.lease
   #define nsf_numboots    nsf_rec.numboots
   
   /* NFSNSF_xxx flags */
   #define NFSNSF_UPDATEDONE       0x01
   #define NFSNSF_GRACEOVER        0x02
   #define NFSNSF_NEEDLOCK         0x04
   #define NFSNSF_EXPIREDCLIENT    0x08
   #define NFSNSF_NOOPENS          0x10
   #define NFSNSF_OK               0x20
   
   /*
    * Maximum number of boot times allowed in record. Although there is
    * really no need for a fixed upper bound, this serves as a sanity check
    * for a corrupted file.
    */
   #define NFSNSF_MAXNUMBOOTS      10000
   
   /*
    * This structure defines the other records in the file. The
    * nst_client array is actually the size of the client string name.
    */
   struct nfst_rec {
           u_int16_t       len;
           u_char          flag;
           u_char          client[1];
   };
   /* and the values for flag */
   #define NFSNST_NEWSTATE 0x1
   #define NFSNST_REVOKE           0x2
   #define NFSNST_GOTSTATE         0x4
   
   /*
    * This structure is linked onto nfsrv_stablefirst for the duration of
    * reclaim.
    */
   struct nfsrv_stable {
           LIST_ENTRY(nfsrv_stable) nst_list;
           struct nfsclient        *nst_clp;
           struct nfst_rec         nst_rec;
   };
   #define nst_timestamp   nst_rec.timestamp
   #define nst_len         nst_rec.len
   #define nst_flag        nst_rec.flag
   #define nst_client      nst_rec.client
   
   /*
    * At some point the server will run out of kernel storage for
    * state structures. For FreeBSD5.2, this results in a panic
    * kmem_map is full. It happens at well over 1000000 opens plus
    * locks on a PIII-800 with 256Mbytes, so that is where I've set
    * the limit. If your server panics due to too many opens/locks,
    * decrease the size of NFSRV_V4STATELIMIT. If you find the server
    * returning NFS4ERR_RESOURCE a lot and have lots of memory, try
    * increasing it.
    */
   #define NFSRV_V4STATELIMIT      500000  /* Max # of Opens + Locks */
   
   /*
    * The type required differs with BSDen (just the second arg).
    */
   void nfsrvd_rcv(struct socket *, void *, int);
   
   /*
    * Macros for handling socket addresses. (Hopefully this makes the code
    * more portable, since I've noticed some 'BSD don't have sockaddrs in
    * mbufs any more.)
    */
   #define NFSSOCKADDR(a, t)       ((t)(a))
   #define NFSSOCKADDRALLOC(a)                                     \
       do {                                                        \
           MALLOC((a), struct sockaddr *, sizeof (struct sockaddr), \
               M_SONAME, M_WAITOK);                                \
           NFSBZERO((a), sizeof (struct sockaddr));                \
       } while (0)
   #define NFSSOCKADDRSIZE(a, s)           ((a)->sa_len = (s))
   #define NFSSOCKADDRFREE(a)                                      \
           do {                                                    \
                   if (a)                                          \
                           FREE((caddr_t)(a), M_SONAME);           \
           } while (0)
   
   /*
    * These should be defined as a process or thread structure, as required
    * for signal handling, etc.
    */
   #define NFSNEWCRED(c)           (crdup(c))
   #define NFSPROCCRED(p)          ((p)->td_ucred)
   #define NFSFREECRED(c)          (crfree(c))
   #define NFSUIOPROC(u, p)        ((u)->uio_td = NULL)
   #define NFSPROCP(p)             ((p)->td_proc)
   
   /*
    * Define these so that cn_hash and its length is ignored.
    */
   #define NFSCNHASHZERO(c)
   #define NFSCNHASH(c, v)
   #define NCHNAMLEN       9999999
   
   /*
    * These macros are defined to initialize and set the timer routine.
    */
   #define NFS_TIMERINIT \
           newnfs_timer(NULL)
   
   /*
    * Handle SMP stuff:
    */
   #define NFSSTATESPINLOCK        extern struct mtx nfs_state_mutex
   #define NFSLOCKSTATE()          mtx_lock(&nfs_state_mutex)
   #define NFSUNLOCKSTATE()        mtx_unlock(&nfs_state_mutex)
   #define NFSSTATEMUTEXPTR        (&nfs_state_mutex)
   #define NFSREQSPINLOCK          extern struct mtx nfs_req_mutex
   #define NFSLOCKREQ()            mtx_lock(&nfs_req_mutex)
   #define NFSUNLOCKREQ()          mtx_unlock(&nfs_req_mutex)
   #define NFSSOCKMUTEX            extern struct mtx nfs_slock_mutex
   #define NFSSOCKMUTEXPTR         (&nfs_slock_mutex)
   #define NFSLOCKSOCK()           mtx_lock(&nfs_slock_mutex)
   #define NFSUNLOCKSOCK()         mtx_unlock(&nfs_slock_mutex)
   #define NFSNAMEIDMUTEX          extern struct mtx nfs_nameid_mutex
   #define NFSLOCKNAMEID()         mtx_lock(&nfs_nameid_mutex)
   #define NFSUNLOCKNAMEID()       mtx_unlock(&nfs_nameid_mutex)
   #define NFSNAMEIDREQUIRED()     mtx_assert(&nfs_nameid_mutex, MA_OWNED)
   #define NFSCLSTATEMUTEX         extern struct mtx nfs_clstate_mutex
   #define NFSCLSTATEMUTEXPTR      (&nfs_clstate_mutex)
   #define NFSLOCKCLSTATE()        mtx_lock(&nfs_clstate_mutex)
   #define NFSUNLOCKCLSTATE()      mtx_unlock(&nfs_clstate_mutex)
   #define NFSDLOCKMUTEX           extern struct mtx newnfsd_mtx
   #define NFSDLOCKMUTEXPTR        (&newnfsd_mtx)
   #define NFSD_LOCK()             mtx_lock(&newnfsd_mtx)
   #define NFSD_UNLOCK()           mtx_unlock(&newnfsd_mtx)
   #define NFSD_LOCK_ASSERT()      mtx_assert(&newnfsd_mtx, MA_OWNED)
   #define NFSD_UNLOCK_ASSERT()    mtx_assert(&newnfsd_mtx, MA_NOTOWNED)
   #define NFSV4ROOTLOCKMUTEX      extern struct mtx nfs_v4root_mutex
   #define NFSV4ROOTLOCKMUTEXPTR   (&nfs_v4root_mutex)
   #define NFSLOCKV4ROOTMUTEX()    mtx_lock(&nfs_v4root_mutex)
   #define NFSUNLOCKV4ROOTMUTEX()  mtx_unlock(&nfs_v4root_mutex)
   #define NFSLOCKNODE(n)          mtx_lock(&((n)->n_mtx))
   #define NFSUNLOCKNODE(n)        mtx_unlock(&((n)->n_mtx))
   #define NFSLOCKMNT(m)           mtx_lock(&((m)->nm_mtx))
   #define NFSUNLOCKMNT(m)         mtx_unlock(&((m)->nm_mtx))
   #define NFSLOCKREQUEST(r)       mtx_lock(&((r)->r_mtx))
   #define NFSUNLOCKREQUEST(r)     mtx_unlock(&((r)->r_mtx))
   #define NFSPROCLISTLOCK()       sx_slock(&allproc_lock)
   #define NFSPROCLISTUNLOCK()     sx_sunlock(&allproc_lock)
   #define NFSLOCKSOCKREQ(r)       mtx_lock(&((r)->nr_mtx))
   #define NFSUNLOCKSOCKREQ(r)     mtx_unlock(&((r)->nr_mtx))
   
   /*
    * Use these macros to initialize/free a mutex.
    */
   #define NFSINITSOCKMUTEX(m)     mtx_init((m), "nfssock", NULL, MTX_DEF)
   #define NFSFREEMUTEX(m)         mtx_destroy((m))
   
   int nfsmsleep(void *, void *, int, const char *, struct timespec *);
   
   /*
    * And weird vm stuff in the nfs server.
    */
   #define PDIRUNLOCK      0x0
   #define MAX_COMMIT_COUNT        (1024 * 1024)
   
   /*
    * Define these to handle the type of va_rdev.
    */
   #define NFSMAKEDEV(m, n)        makedev((m), (n))
   #define NFSMAJOR(d)             major(d)
   #define NFSMINOR(d)             minor(d)
   
   /*
    * Define this to be the macro that returns the minimum size required
    * for a directory entry.
    */
   #define DIRENT_SIZE(dp)         GENERIC_DIRSIZ(dp)
   
   /*
    * The vnode tag for nfsv4root.
    */
   #define VT_NFSV4ROOT            "nfsv4root"
   
   /*
    * Define whatever it takes to do a vn_rdwr().
    */
   #define NFSD_RDWR(r, v, b, l, o, s, i, c, a, p) \
           vn_rdwr((r), (v), (b), (l), (o), (s), (i), (c), NULL, (a), (p))
   
   /*
    * Macros for handling memory for different BSDen.
    * NFSBCOPY(src, dst, len) - copies len bytes, non-overlapping
    * NFSOVBCOPY(src, dst, len) - ditto, but data areas might overlap
    * NFSBCMP(cp1, cp2, len) - compare len bytes, return 0 if same
    * NFSBZERO(cp, len) - set len bytes to 0x0
    */
   #define NFSBCOPY(s, d, l)       bcopy((s), (d), (l))
   #define NFSOVBCOPY(s, d, l)     ovbcopy((s), (d), (l))
   #define NFSBCMP(s, d, l)        bcmp((s), (d), (l))
   #define NFSBZERO(s, l)          bzero((s), (l))
   
   /*
    * Some queue.h files don't have these dfined in them.
    */
   #define LIST_END(head)          NULL
   #define SLIST_END(head)         NULL
   #define TAILQ_END(head)         NULL
   
   /*
    * This must be defined to be a global variable that increments once
    * per second, but never stops or goes backwards, even when a "date"
    * command changes the TOD clock. It is used for delta times for
    * leases, etc.
    */
   #define NFSD_MONOSEC            time_uptime
   
   /*
    * Declare the malloc types.
    */
   MALLOC_DECLARE(M_NEWNFSRVCACHE);
   MALLOC_DECLARE(M_NEWNFSDCLIENT);
   MALLOC_DECLARE(M_NEWNFSDSTATE);
   MALLOC_DECLARE(M_NEWNFSDLOCK);
   MALLOC_DECLARE(M_NEWNFSDLOCKFILE);
   MALLOC_DECLARE(M_NEWNFSSTRING);
   MALLOC_DECLARE(M_NEWNFSUSERGROUP);
   MALLOC_DECLARE(M_NEWNFSDREQ);
   MALLOC_DECLARE(M_NEWNFSFH);
   MALLOC_DECLARE(M_NEWNFSCLOWNER);
   MALLOC_DECLARE(M_NEWNFSCLOPEN);
   MALLOC_DECLARE(M_NEWNFSCLDELEG);
   MALLOC_DECLARE(M_NEWNFSCLCLIENT);
   MALLOC_DECLARE(M_NEWNFSCLLOCKOWNER);
   MALLOC_DECLARE(M_NEWNFSCLLOCK);
   MALLOC_DECLARE(M_NEWNFSDIROFF);
   MALLOC_DECLARE(M_NEWNFSV4NODE);
   MALLOC_DECLARE(M_NEWNFSDIRECTIO);
   MALLOC_DECLARE(M_NEWNFSMNT);
   MALLOC_DECLARE(M_NEWNFSDROLLBACK);
   #define M_NFSRVCACHE    M_NEWNFSRVCACHE
   #define M_NFSDCLIENT    M_NEWNFSDCLIENT
   #define M_NFSDSTATE     M_NEWNFSDSTATE
   #define M_NFSDLOCK      M_NEWNFSDLOCK
   #define M_NFSDLOCKFILE  M_NEWNFSDLOCKFILE
   #define M_NFSSTRING     M_NEWNFSSTRING
   #define M_NFSUSERGROUP  M_NEWNFSUSERGROUP
   #define M_NFSDREQ       M_NEWNFSDREQ
   #define M_NFSFH         M_NEWNFSFH
   #define M_NFSCLOWNER    M_NEWNFSCLOWNER
   #define M_NFSCLOPEN     M_NEWNFSCLOPEN
   #define M_NFSCLDELEG    M_NEWNFSCLDELEG
   #define M_NFSCLCLIENT   M_NEWNFSCLCLIENT
   #define M_NFSCLLOCKOWNER M_NEWNFSCLLOCKOWNER
   #define M_NFSCLLOCK     M_NEWNFSCLLOCK
   #define M_NFSDIROFF     M_NEWNFSDIROFF
   #define M_NFSV4NODE     M_NEWNFSV4NODE
   #define M_NFSDIRECTIO   M_NEWNFSDIRECTIO
   #define M_NFSDROLLBACK  M_NEWNFSDROLLBACK
   
   #define NFSINT_SIGMASK(set)                                             \
           (SIGISMEMBER(set, SIGINT) || SIGISMEMBER(set, SIGTERM) ||       \
            SIGISMEMBER(set, SIGHUP) || SIGISMEMBER(set, SIGKILL) ||       \
            SIGISMEMBER(set, SIGQUIT))
   
   /*
    * Convert a quota block count to byte count.
    */
   #define NFSQUOTABLKTOBYTE(q, b) (q) *= (b)
   
   /*
    * Define this as the largest file size supported. (It should probably
    * be available via a VFS_xxx Op, but it isn't.
    */
   #define NFSRV_MAXFILESIZE       ((u_int64_t)0x800000000000)
   
   /*
    * Set this macro to index() or strchr(), whichever is supported.
    */
   #define STRCHR(s, c)    index((s), (c))
   
   /*
    * Set the n_time in the client write rpc, as required.
    */
   #define NFSWRITERPC_SETTIME(w, n, a, v4)                                \
           do {                                                            \
                   if (w) {                                                \
                           mtx_lock(&((n)->n_mtx));                        \
                           (n)->n_mtime = (a)->na_mtime;                   \
                           if (v4)                                         \
                                   (n)->n_change = (a)->na_filerev;        \
                           mtx_unlock(&((n)->n_mtx));                      \
                   }                                                       \
           } while (0)
   
   /*
    * Fake value, just to make the client work.
    */
   #define NFS_LATTR_NOSHRINK      1
   
   /*
    * Prototypes for functions where the arguments vary for different ports.
    */
   int nfscl_loadattrcache(struct vnode **, struct nfsvattr *, void *, void *,
       int, int);
   int newnfs_realign(struct mbuf **, int);
   
   /*
    * If the port runs on an SMP box that can enforce Atomic ops with low
    * overheads, define these as atomic increments/decrements. If not,
    * don't worry about it, since these are used for stats that can be
    * "out by one" without disastrous consequences.
    */
   #define NFSINCRGLOBAL(a)        ((a)++)
   
   /*
    * Assorted funky stuff to make things work under Darwin8.
    */
   /*
    * These macros checks for a field in vattr being set.
    */
   #define NFSATTRISSET(t, v, a)   ((v)->a != (t)VNOVAL)
   #define NFSATTRISSETTIME(v, a)  ((v)->a.tv_sec != VNOVAL)
   
   /*
    * Manipulate mount flags.
    */
   #define NFSSTA_HASWRITEVERF     0x00040000  /* Has write verifier */
   #define NFSSTA_GOTFSINFO        0x00100000  /* Got the fsinfo */
   #define NFSSTA_TIMEO            0x10000000  /* Experiencing a timeout */
   #define NFSSTA_LOCKTIMEO        0x20000000  /* Experiencing a lockd timeout */
   #define NFSSTA_HASSETFSID       0x40000000  /* Has set the fsid */
   
   #define NFSHASNFSV3(n)          ((n)->nm_flag & NFSMNT_NFSV3)
   #define NFSHASNFSV4(n)          ((n)->nm_flag & NFSMNT_NFSV4)
   #define NFSHASNFSV3OR4(n)       ((n)->nm_flag & (NFSMNT_NFSV3 | NFSMNT_NFSV4))
   #define NFSHASGOTFSINFO(n)      ((n)->nm_state & NFSSTA_GOTFSINFO)
   #define NFSHASHASSETFSID(n)     ((n)->nm_state & NFSSTA_HASSETFSID)
   #define NFSHASSTRICT3530(n)     ((n)->nm_flag & NFSMNT_STRICT3530)
   #define NFSHASWRITEVERF(n)      ((n)->nm_state & NFSSTA_HASWRITEVERF)
   #define NFSHASINT(n)            ((n)->nm_flag & NFSMNT_INT)
   #define NFSHASSOFT(n)           ((n)->nm_flag & NFSMNT_SOFT)
   #define NFSHASINTORSOFT(n)      ((n)->nm_flag & (NFSMNT_INT | NFSMNT_SOFT))
   #define NFSHASDUMBTIMR(n)       ((n)->nm_flag & NFSMNT_DUMBTIMR)
   #define NFSHASNOCONN(n)         ((n)->nm_flag & NFSMNT_MNTD)
   #define NFSHASKERB(n)           ((n)->nm_flag & NFSMNT_KERB)
   #define NFSHASALLGSSNAME(n)     ((n)->nm_flag & NFSMNT_ALLGSSNAME)
   #define NFSHASINTEGRITY(n)      ((n)->nm_flag & NFSMNT_INTEGRITY)
   #define NFSHASPRIVACY(n)        ((n)->nm_flag & NFSMNT_PRIVACY)
   #define NFSSETWRITEVERF(n)      ((n)->nm_state |= NFSSTA_HASWRITEVERF)
   #define NFSSETHASSETFSID(n)     ((n)->nm_state |= NFSSTA_HASSETFSID)
   
   /*
    * Gets the stats field out of the mount structure.
    */
   #define vfs_statfs(m)   (&((m)->mnt_stat))
   
   /*
    * Set boottime.
    */
   #define NFSSETBOOTTIME(b)       ((b) = boottime)
   
   /*
    * The size of directory blocks in the buffer cache.
    * MUST BE in the range of PAGE_SIZE <= NFS_DIRBLKSIZ <= MAXBSIZE!!
    */
   #define NFS_DIRBLKSIZ   (16 * DIRBLKSIZ) /* Must be a multiple of DIRBLKSIZ */
   
   /*
    * Define these macros to access mnt_flag fields.
    */
   #define NFSMNT_RDONLY(m)        ((m)->mnt_flag & MNT_RDONLY)
   #endif  /* _KERNEL */
   
   /*
    * Define a structure similar to ufs_args for use in exporting the V4 root.
    */
   struct nfsex_args {
           char    *fspec;
           struct export_args      export;
   };
   
   /*
    * These export flags should be defined, but there are no bits left.
    * Maybe a separate mnt_exflag field could be added or the mnt_flag
    * field increased to 64 bits?
    */
   #ifndef MNT_EXSTRICTACCESS
   #define MNT_EXSTRICTACCESS      0x0
   #endif
   #ifndef MNT_EXV4ONLY
   #define MNT_EXV4ONLY            0x0
   #endif
   
   #ifdef _KERNEL
   /*
    * Define this to invalidate the attribute cache for the nfs node.
    */
   #define NFSINVALATTRCACHE(n)    ((n)->n_attrstamp = 0)
   
   /* Used for FreeBSD only */
   void nfsd_mntinit(void);
   
   /*
    * Define these for vnode lock/unlock ops.
    *
    * These are good abstractions to macro out, so that they can be added to
    * later, for debugging or stats, etc.
    */
   #define NFSVOPLOCK(v, f)        vn_lock((v), (f))
   #define NFSVOPUNLOCK(v, f)      VOP_UNLOCK((v), (f))
   #define NFSVOPISLOCKED(v)       VOP_ISLOCKED((v))
   
   /*
    * Define ncl_hash().
    */
   #define ncl_hash(f, l)  (fnv_32_buf((f), (l), FNV1_32_INIT))
   
   int newnfs_iosize(struct nfsmount *);
   
   #ifdef NFS_DEBUG
   
   extern int nfs_debug;
   #define NFS_DEBUG_ASYNCIO       1 /* asynchronous i/o */
   #define NFS_DEBUG_WG            2 /* server write gathering */
   #define NFS_DEBUG_RC            4 /* server request caching */
   
   #define NFS_DPF(cat, args)                                      \
           do {                                                    \
                   if (nfs_debug & NFS_DEBUG_##cat) printf args;   \
           } while (0)
   
   #else
   
   #define NFS_DPF(cat, args)
   
   #endif
   
   int newnfs_vncmpf(struct vnode *, void *);
   
   #ifndef NFS_MINDIRATTRTIMO
   #define NFS_MINDIRATTRTIMO 3            /* VDIR attrib cache timeout in sec */
   #endif
   #ifndef NFS_MAXDIRATTRTIMO
   #define NFS_MAXDIRATTRTIMO 60
   #endif
   
   /*
    * Nfs outstanding request list element
    */
   struct nfsreq {
           TAILQ_ENTRY(nfsreq) r_chain;
           u_int32_t       r_flags;        /* flags on request, see below */
           struct nfsmount *r_nmp;         /* Client mnt ptr */
           struct mtx      r_mtx;          /* Mutex lock for this structure */
   };
   
   #ifndef NFS_MAXBSIZE
   #define NFS_MAXBSIZE    MAXBSIZE
   #endif
   
   /*
    * This macro checks to see if issuing of delegations is allowed for this
    * vnode.
    */
   #ifdef VV_DISABLEDELEG
   #define NFSVNO_DELEGOK(v)                                               \
           ((v) == NULL || ((v)->v_vflag & VV_DISABLEDELEG) == 0)
   #else
   #define NFSVNO_DELEGOK(v)       (1)
   #endif
   
   /*
    * Define this as the flags argument for msleep() when catching signals
    * while holding a resource that other threads would block for, such as
    * a vnode lock.
    */
   #define NFS_PCATCH      (PCATCH | PBDRY)
   
   #endif  /* _KERNEL */
   
   #endif  /* _NFS_NFSPORT_H */

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