The Design and Implementation of the FreeBSD Operating System, Second Edition
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FreeBSD/Linux Kernel Cross Reference
sys/nfs/nfs.h

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    1 /*      $NetBSD: nfs.h,v 1.72 2010/03/02 23:19:09 pooka Exp $   */
    2 /*
    3  * Copyright (c) 1989, 1993, 1995
    4  *      The Regents of the University of California.  All rights reserved.
    5  *
    6  * This code is derived from software contributed to Berkeley by
    7  * Rick Macklem at The University of Guelph.
    8  *
    9  * Redistribution and use in source and binary forms, with or without
   10  * modification, are permitted provided that the following conditions
   11  * are met:
   12  * 1. Redistributions of source code must retain the above copyright
   13  *    notice, this list of conditions and the following disclaimer.
   14  * 2. Redistributions in binary form must reproduce the above copyright
   15  *    notice, this list of conditions and the following disclaimer in the
   16  *    documentation and/or other materials provided with the distribution.
   17  * 3. Neither the name of the University nor the names of its contributors
   18  *    may be used to endorse or promote products derived from this software
   19  *    without specific prior written permission.
   20  *
   21  * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
   22  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
   23  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
   24  * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
   25  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
   26  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
   27  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
   28  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
   29  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
   30  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
   31  * SUCH DAMAGE.
   32  *
   33  *      @(#)nfs.h       8.4 (Berkeley) 5/1/95
   34  */
   35 
   36 #ifndef _NFS_NFS_H_
   37 #define _NFS_NFS_H_
   38 
   39 #ifdef _KERNEL
   40 #include <sys/condvar.h>
   41 #include <sys/fstypes.h>
   42 #include <sys/mbuf.h>
   43 #include <sys/mutex.h>
   44 #endif
   45 
   46 /*
   47  * Tunable constants for nfs
   48  */
   49 
   50 #define NFS_MAXIOVEC    34
   51 #define NFS_TICKINTVL   5               /* Desired time for a tick (msec) */
   52 #define NFS_HZ          (hz / nfs_ticks) /* Ticks/sec */
   53 #define NFS_TIMEO       (3 * NFS_HZ)    /* Default timeout = 3 seconds */
   54 #define NFS_MINTIMEO    (1 * NFS_HZ)    /* Min timeout to use */
   55 #define NFS_MAXTIMEO    (60 * NFS_HZ)   /* Max timeout to backoff to */
   56 #define NFS_MINIDEMTIMEO (5 * NFS_HZ)   /* Min timeout for non-idempotent ops*/
   57 #define NFS_MAXREXMIT   100             /* Stop counting after this many */
   58 #define NFS_MAXWINDOW   1024            /* Max number of outstanding requests */
   59 #define NFS_RETRANS     10              /* Num of retrans for soft mounts */
   60 #define NFS_MAXGRPS     16              /* Max. size of groups list */
   61 #ifndef NFS_MINATTRTIMO
   62 #define NFS_MINATTRTIMO 5               /* Attribute cache timeout in sec */
   63 #endif
   64 #ifndef NFS_MAXATTRTIMO
   65 #define NFS_MAXATTRTIMO 60
   66 #endif
   67 #define NFS_TRYLATERDEL 1               /* Initial try later delay (sec) */
   68 #define NFS_TRYLATERDELMAX (1*60)       /* Maximum try later delay (sec) */
   69 #define NFS_TRYLATERDELMUL 2            /* Exponential backoff multiplier */
   70 
   71 #define NFS_CWNDSCALE   256             
   72 #define NFS_MAXCWND     (NFS_CWNDSCALE * 32)    
   73 
   74 /*
   75  * These can be overridden through <machine/param.h>, included via
   76  * <sys/param.h>. This means that <sys/param.h> should always be
   77  * included before this file.
   78  */
   79 #ifndef NFS_WSIZE
   80 #define NFS_WSIZE       8192            /* Def. write data size */
   81 #endif
   82 #ifndef NFS_RSIZE
   83 #define NFS_RSIZE       8192            /* Def. read data size */
   84 #endif
   85 #ifndef NFS_READDIRSIZE
   86 #define NFS_READDIRSIZE 8192            /* Def. readdir size */
   87 #endif
   88 
   89 /*
   90  * NFS client IO daemon threads. May be overridden by config options.
   91  */
   92 #ifndef NFS_MAXASYNCDAEMON
   93 #define NFS_MAXASYNCDAEMON      128     /* Max. number async_daemons runable */
   94 #endif
   95 
   96 /*
   97  * NFS client read-ahead. May be overridden by config options.
   98  * Should be no more than NFS_MAXASYNCDAEMON as each read-ahead operation
   99  * requires one IO thread.
  100  */
  101 #ifndef NFS_MAXRAHEAD
  102 #define NFS_MAXRAHEAD   32              /* Max. read ahead # blocks */
  103 #endif
  104 #define NFS_DEFRAHEAD   2               /* Def. read ahead # blocks */
  105 
  106 #define NFS_MAXUIDHASH  64              /* Max. # of hashed uid entries/mp */
  107 
  108 #define NFS_DEFDEADTHRESH NFS_NEVERDEAD /* Default nm_deadthresh */
  109 #define NFS_NEVERDEAD   9               /* Greater than max. nm_timeouts */
  110 
  111 #ifdef _KERNEL
  112 extern int nfs_niothreads;              /* Number of async_daemons desired */
  113 #ifndef NFS_DEFAULT_NIOTHREADS
  114 #define NFS_DEFAULT_NIOTHREADS 4
  115 #endif
  116 #endif
  117 #define NFS_MAXGATHERDELAY      100     /* Max. write gather delay (msec) */
  118 #ifndef NFS_GATHERDELAY
  119 #define NFS_GATHERDELAY         10      /* Default write gather delay (msec) */
  120 #endif
  121 
  122 /*
  123  * NFS_DIRBLKSIZ is the size of buffers in the buffer cache used for
  124  * NFS directory vnodes. NFS_DIRFRAGSIZ is the minimum aligned amount
  125  * of data in those buffers, and thus the minimum amount of data
  126  * that you can request. NFS_DIRFRAGSIZ should be no smaller than
  127  * DIRBLKSIZ.
  128  */
  129 
  130 #define NFS_DIRBLKSIZ   8192            /* Must be a multiple of DIRBLKSIZ */
  131 #define NFS_DIRFRAGSIZ   512            /* Same as DIRBLKSIZ, generally */
  132 
  133 /*
  134  * Maximum number of directory entries cached per NFS node, to avoid
  135  * having this grow without bounds on very large directories. The
  136  * minimum size to get reasonable performance for emulated binaries
  137  * is the maximum number of entries that fits in NFS_DIRBLKSIZ.
  138  * For NFS_DIRBLKSIZ = 512, this would be 512 / 14 = 36.
  139  */
  140 #define NFS_MAXDIRCACHE (NFS_DIRBLKSIZ / 14)
  141 
  142 /*
  143  * Oddballs
  144  */
  145 #define NFS_CMPFH(n, f, s) \
  146         ((n)->n_fhsize == (s) && !memcmp((void *)(n)->n_fhp,  (void *)(f),  (s)))
  147 #ifdef NFS_V2_ONLY
  148 #define NFS_ISV3(v)     (0)
  149 #else
  150 #define NFS_ISV3(v)     (VFSTONFS((v)->v_mount)->nm_flag & NFSMNT_NFSV3)
  151 #endif
  152 #define NFS_SRVMAXDATA(n) \
  153                 (((n)->nd_flag & ND_NFSV3) ? (((n)->nd_nam2) ? \
  154                  NFS_MAXDGRAMDATA : NFS_MAXDATA) : NFS_V2MAXDATA)
  155 
  156 /*
  157  * Use the vm_page flag reserved for pager use to indicate pages
  158  * which have been written to the server but not yet committed.
  159  */
  160 #define PG_NEEDCOMMIT PG_PAGER1
  161 
  162 /*
  163  * The IO_METASYNC flag should be implemented for local file systems.
  164  * (Until then, it is nothin at all.)
  165  */
  166 #ifndef IO_METASYNC
  167 #define IO_METASYNC     0
  168 #endif
  169 
  170 /*
  171  * Export arguments for local filesystem mount calls.
  172  * Keep in mind that changing this structure modifies nfssvc(2)'s ABI (see
  173  * 'struct mountd_exports_list' below).
  174  * When modifying this structure, take care to also edit the
  175  * nfs_update_exports_30 function in nfs_export.c accordingly to convert
  176  * export_args to export_args30.
  177  */
  178 struct export_args {
  179         int     ex_flags;               /* export related flags */
  180         uid_t   ex_root;                /* mapping for root uid */
  181         struct  uucred ex_anon;         /* mapping for anonymous user */
  182         struct  sockaddr *ex_addr;      /* net address to which exported */
  183         int     ex_addrlen;             /* and the net address length */
  184         struct  sockaddr *ex_mask;      /* mask of valid bits in saddr */
  185         int     ex_masklen;             /* and the smask length */
  186         char    *ex_indexfile;          /* index file for WebNFS URLs */
  187 };
  188 
  189 /*
  190  * Structures for the nfssvc(2) syscall. Not that anyone but mountd, nfsd and
  191  * mount_nfs should ever try and use it.
  192  */
  193 struct nfsd_args {
  194         int     sock;           /* Socket to serve */
  195         void *  name;           /* Client addr for connection based sockets */
  196         int     namelen;        /* Length of name */
  197 };
  198 
  199 struct nfsd_srvargs {
  200         struct nfsd     *nsd_nfsd;      /* Pointer to in kernel nfsd struct */
  201         uid_t           nsd_uid;        /* Effective uid mapped to cred */
  202         u_int32_t       nsd_haddr;      /* Ip address of client */
  203         struct uucred   nsd_cr;         /* Cred. uid maps to */
  204         int             nsd_authlen;    /* Length of auth string (ret) */
  205         u_char          *nsd_authstr;   /* Auth string (ret) */
  206         int             nsd_verflen;    /* and the verfier */
  207         u_char          *nsd_verfstr;
  208         struct timeval  nsd_timestamp;  /* timestamp from verifier */
  209         u_int32_t       nsd_ttl;        /* credential ttl (sec) */
  210         NFSKERBKEY_T    nsd_key;        /* Session key */
  211 };
  212 
  213 struct nfsd_cargs {
  214         char            *ncd_dirp;      /* Mount dir path */
  215         uid_t           ncd_authuid;    /* Effective uid */
  216         int             ncd_authtype;   /* Type of authenticator */
  217         u_int           ncd_authlen;    /* Length of authenticator string */
  218         u_char          *ncd_authstr;   /* Authenticator string */
  219         u_int           ncd_verflen;    /* and the verifier */
  220         u_char          *ncd_verfstr;
  221         NFSKERBKEY_T    ncd_key;        /* Session key */
  222 };
  223 
  224 struct mountd_exports_list {
  225         const char              *mel_path;
  226         size_t                  mel_nexports;
  227         struct export_args      *mel_exports;
  228 };
  229 
  230 /*
  231  * try to keep nfsstats, which is exposed to userland via sysctl,
  232  * compatible after NQNFS removal.
  233  * 26 is the old value of NFS_NPROCS, which includes NQNFS procedures.
  234  */
  235 #define NFSSTATS_NPROCS 26
  236 
  237 /*
  238  * Stats structure
  239  */
  240 struct nfsstats {
  241         int     attrcache_hits;
  242         int     attrcache_misses;
  243         int     lookupcache_hits;
  244         int     lookupcache_misses;
  245         int     direofcache_hits;
  246         int     direofcache_misses;
  247         int     biocache_reads;
  248         int     read_bios;
  249         int     read_physios;
  250         int     biocache_writes;
  251         int     write_bios;
  252         int     write_physios;
  253         int     biocache_readlinks;
  254         int     readlink_bios;
  255         int     biocache_readdirs;
  256         int     readdir_bios;
  257         int     rpccnt[NFSSTATS_NPROCS];
  258         int     rpcretries;
  259         int     srvrpccnt[NFSSTATS_NPROCS];
  260         int     srvrpc_errs;
  261         int     srv_errs;
  262         int     rpcrequests;
  263         int     rpctimeouts;
  264         int     rpcunexpected;
  265         int     rpcinvalid;
  266         int     srvcache_inproghits;
  267         int     srvcache_idemdonehits;
  268         int     srvcache_nonidemdonehits;
  269         int     srvcache_misses;
  270         int     __srvnqnfs_leases;      /* unused */
  271         int     __srvnqnfs_maxleases;   /* unused */
  272         int     __srvnqnfs_getleases;   /* unused */
  273         int     srvvop_writes;
  274 };
  275 
  276 /*
  277  * Flags for nfssvc() system call.
  278  */
  279 #define NFSSVC_BIOD     0x002
  280 #define NFSSVC_NFSD     0x004
  281 #define NFSSVC_ADDSOCK  0x008
  282 #define NFSSVC_AUTHIN   0x010
  283 #define NFSSVC_GOTAUTH  0x040
  284 #define NFSSVC_AUTHINFAIL 0x080
  285 #define NFSSVC_MNTD     0x100
  286 #define NFSSVC_SETEXPORTSLIST   0x200
  287 
  288 /*
  289  * fs.nfs sysctl(3) identifiers
  290  */
  291 #define NFS_NFSSTATS    1               /* struct: struct nfsstats */
  292 #define NFS_IOTHREADS   2               /* number of io threads */
  293 #define NFS_MAXID       3
  294 
  295 #define NFS_NAMES { \
  296         { 0, 0 }, \
  297         { "nfsstats", CTLTYPE_STRUCT }, \
  298         { "iothreads", CTLTYPE_INT }, \
  299 }
  300 
  301 /*
  302  * The set of signals the interrupt an I/O in progress for NFSMNT_INT mounts.
  303  * What should be in this set is open to debate, but I believe that since
  304  * I/O system calls on ufs are never interrupted by signals the set should
  305  * be minimal. My reasoning is that many current programs that use signals
  306  * such as SIGALRM will not expect file I/O system calls to be interrupted
  307  * by them and break.
  308  */
  309 #ifdef _KERNEL
  310 
  311 struct uio; struct buf; struct vattr; struct nameidata; /* XXX */
  312 
  313 /*
  314  * Socket errors ignored for connectionless sockets??
  315  * For now, ignore them all
  316  */
  317 #define NFSIGNORE_SOERROR(s, e) \
  318                 ((e) != EINTR && (e) != ERESTART && (e) != EWOULDBLOCK && \
  319                 ((s) & PR_CONNREQUIRED) == 0)
  320 
  321 /*
  322  * Nfs outstanding request list element
  323  */
  324 struct nfsreq {
  325         TAILQ_ENTRY(nfsreq) r_chain;
  326         struct mbuf     *r_mreq;
  327         struct mbuf     *r_mrep;
  328         struct mbuf     *r_md;
  329         void *          r_dpos;
  330         struct nfsmount *r_nmp;
  331         u_int32_t       r_xid;
  332         int             r_flags;        /* flags on request, see below */
  333         int             r_retry;        /* max retransmission count */
  334         int             r_rexmit;       /* current retrans count */
  335         u_int32_t       r_procnum;      /* NFS procedure number */
  336         int             r_rtt;          /* RTT for rpc */
  337         struct lwp      *r_lwp;         /* LWP that did I/O system call */
  338 };
  339 
  340 /*
  341  * Queue head for nfsreq's
  342  */
  343 extern TAILQ_HEAD(nfsreqhead, nfsreq) nfs_reqq;
  344 
  345 /* Flag values for r_flags */
  346 #define R_TIMING        0x01            /* timing request (in mntp) */
  347 #define R_SENT          0x02            /* request has been sent */
  348 #define R_SOFTTERM      0x04            /* soft mnt, too many retries */
  349 #define R_INTR          0x08            /* intr mnt, signal pending */
  350 #define R_SOCKERR       0x10            /* Fatal error on socket */
  351 #define R_TPRINTFMSG    0x20            /* Did a tprintf msg. */
  352 #define R_MUSTRESEND    0x40            /* Must resend request */
  353 #define R_REXMITTED     0x100           /* retransmitted after reconnect */
  354 
  355 /*
  356  * A list of nfssvc_sock structures is maintained with all the sockets
  357  * that require service by the nfsd.
  358  * The nfsuid structs hang off of the nfssvc_sock structs in both lru
  359  * and uid hash lists.
  360  */
  361 #ifndef NFS_UIDHASHSIZ
  362 #define NFS_UIDHASHSIZ  29      /* Tune the size of nfssvc_sock with this */
  363 #endif
  364 #define NUIDHASH(sock, uid) \
  365         (&(sock)->ns_uidhashtbl[(uid) % NFS_UIDHASHSIZ])
  366 #ifndef NFS_WDELAYHASHSIZ
  367 #define NFS_WDELAYHASHSIZ 16    /* and with this */
  368 #endif
  369 #ifndef NFS_MUIDHASHSIZ
  370 #define NFS_MUIDHASHSIZ 63      /* Tune the size of nfsmount with this */
  371 #endif
  372 #define NMUIDHASH(nmp, uid) \
  373         (&(nmp)->nm_uidhashtbl[(uid) % NFS_MUIDHASHSIZ])
  374 
  375 #ifndef NFS_DIRHASHSIZ
  376 #define NFS_DIRHASHSIZ 64
  377 #endif
  378 #define NFSDIRHASH(np, off) \
  379         (&np->n_dircache[(nfs_dirhash((off)) & nfsdirhashmask)])
  380 
  381 /*
  382  * Macros for storing/retrieving cookies into directory buffers.
  383  */
  384 #define NFS_STASHCOOKIE(dp,off) \
  385         *((off_t *)((char *)(dp) + (dp)->d_reclen - sizeof (off_t))) = off
  386 #define NFS_GETCOOKIE(dp) \
  387         (*((off_t *)((char *)(dp) + (dp)->d_reclen - sizeof (off_t))))
  388 #define NFS_STASHCOOKIE32(dp, val) \
  389         *((u_int32_t *)((char *)(dp) + (dp)->d_reclen - sizeof (off_t) - \
  390             sizeof (int))) = val
  391 #define NFS_GETCOOKIE32(dp) \
  392         (*((u_int32_t *)((char *)(dp) + (dp)->d_reclen - sizeof (off_t) - \
  393             sizeof (int))))
  394 
  395 /*
  396  * Flags passed to nfs_bioread().
  397  */
  398 #define NFSBIO_CACHECOOKIES     0x0001  /* Cache dir offset cookies */
  399 
  400 /*
  401  * Network address hash list element
  402  */
  403 union nethostaddr {
  404         u_int32_t had_inetaddr;
  405         struct mbuf *had_nam;
  406 };
  407 
  408 struct nfsuid {
  409         TAILQ_ENTRY(nfsuid) nu_lru;     /* LRU chain */
  410         LIST_ENTRY(nfsuid) nu_hash;     /* Hash list */
  411         int             nu_flag;        /* Flags */
  412         union nethostaddr nu_haddr;     /* Host addr. for dgram sockets */
  413         kauth_cred_t    nu_cr;          /* Cred uid mapped to */
  414         int             nu_expire;      /* Expiry time (sec) */
  415         struct timeval  nu_timestamp;   /* Kerb. timestamp */
  416         u_int32_t       nu_nickname;    /* Nickname on server */
  417         NFSKERBKEY_T    nu_key;         /* and session key */
  418 };
  419 
  420 #define nu_inetaddr     nu_haddr.had_inetaddr
  421 #define nu_nam          nu_haddr.had_nam
  422 /* Bits for nu_flag */
  423 #define NU_INETADDR     0x1
  424 #define NU_NAM          0x2
  425 #ifdef INET6
  426 #define NU_NETFAM(u) \
  427         (((u)->nu_flag & NU_INETADDR) ? \
  428         (((u)->nu_flag & NU_NAM) ? AF_INET6 : AF_INET) : AF_ISO)
  429 #else
  430 #define NU_NETFAM(u)    (((u)->nu_flag & NU_INETADDR) ? AF_INET : AF_ISO)
  431 #endif
  432 
  433 /*
  434  * b: protected by SLP_BUSY
  435  * g: protected by nfsd_lock
  436  * s: protected by ns_lock
  437  * a: protected by ns_alock
  438  */
  439 
  440 struct nfssvc_sock {
  441         kmutex_t ns_lock;
  442         kmutex_t ns_alock;
  443         kcondvar_t ns_cv;                       /* s: */
  444         TAILQ_ENTRY(nfssvc_sock) ns_chain;      /* g: List of all nfssvc_sock */
  445         TAILQ_ENTRY(nfssvc_sock) ns_pending;    /* g: List of pending sockets */
  446         TAILQ_HEAD(, nfsuid) ns_uidlruhead;
  447         struct file     *ns_fp;
  448         struct socket   *ns_so;
  449         struct mbuf     *ns_nam;
  450         struct mbuf     *ns_raw;                /* b: */
  451         struct mbuf     *ns_rawend;             /* b: */
  452         struct mbuf     *ns_rec;                /* b: */
  453         struct mbuf     *ns_recend;             /* b: */
  454         struct mbuf     *ns_frag;               /* b: */
  455         int             ns_flags;               /* s: */
  456         int             ns_aflags;              /* a: */
  457         int             ns_gflags;              /* g: */
  458         int             ns_sflags;              /* b: */
  459         int             ns_cc;                  /* b: */
  460         int             ns_reclen;              /* b: */
  461         int             ns_numuids;
  462         u_int32_t       ns_sref;                /* g: */
  463         SIMPLEQ_HEAD(, nfsrv_descript) ns_sendq; /* s: send reply list */
  464         LIST_HEAD(, nfsrv_descript) ns_tq;      /* g: Write gather lists */
  465         LIST_HEAD(, nfsuid) ns_uidhashtbl[NFS_UIDHASHSIZ];
  466         LIST_HEAD(nfsrvw_delayhash, nfsrv_descript) ns_wdelayhashtbl[NFS_WDELAYHASHSIZ]; /* g: */
  467 };
  468 
  469 /* Bits for "ns_flags" */
  470 #define SLP_VALID       0x01
  471 #define SLP_BUSY        0x10
  472 #define SLP_SENDING     0x80
  473 
  474 /* Bits for "ns_aflags" */
  475 #define SLP_A_NEEDQ     0x01
  476 #define SLP_A_DISCONN   0x04
  477 
  478 /* Bits for "ns_gflags" */
  479 #define SLP_G_DOREC     0x02    /* on nfssvc_sockpending queue */
  480 
  481 /* Bits for "ns_sflags" */
  482 #define SLP_S_LASTFRAG  0x40
  483 
  484 extern TAILQ_HEAD(nfssvc_sockhead, nfssvc_sock) nfssvc_sockhead;
  485 extern struct nfssvc_sockhead nfssvc_sockpending;
  486 extern int nfssvc_sockhead_flag;
  487 #define SLP_INIT        0x01
  488 
  489 /*
  490  * One of these structures is allocated for each nfsd.
  491  */
  492 struct nfsd {
  493         TAILQ_ENTRY(nfsd) nfsd_chain;   /* List of all nfsd's */
  494         SLIST_ENTRY(nfsd) nfsd_idle;    /* List of idle nfsd's */
  495         kcondvar_t      nfsd_cv;
  496         int             nfsd_flag;      /* NFSD_ flags */
  497         struct nfssvc_sock *nfsd_slp;   /* Current socket */
  498         int             nfsd_authlen;   /* Authenticator len */
  499         u_char          nfsd_authstr[RPCAUTH_MAXSIZ]; /* Authenticator data */
  500         int             nfsd_verflen;   /* and the Verifier */
  501         u_char          nfsd_verfstr[RPCVERF_MAXSIZ];
  502         struct proc     *nfsd_procp;    /* Proc ptr */
  503         struct nfsrv_descript *nfsd_nd; /* Associated nfsrv_descript */
  504 };
  505 
  506 /* Bits for "nfsd_flag" */
  507 #define NFSD_NEEDAUTH   0x04
  508 #define NFSD_AUTHFAIL   0x08
  509 
  510 #define NFSD_MAXFHSIZE  64
  511 typedef struct nfsrvfh {
  512         size_t nsfh_size;
  513         union {
  514                 fhandle_t u_fh;
  515                 uint8_t u_opaque[NFSD_MAXFHSIZE];
  516         } nsfh_u;
  517 } nfsrvfh_t;
  518 #define NFSRVFH_SIZE(nsfh)      ((nsfh)->nsfh_size)
  519 #define NFSRVFH_DATA(nsfh)      ((nsfh)->nsfh_u.u_opaque)
  520 #define NFSRVFH_FHANDLE(nsfh)   (&(nsfh)->nsfh_u.u_fh)
  521 
  522 /*
  523  * This structure is used by the server for describing each request.
  524  * Some fields are used only when write request gathering is performed.
  525  */
  526 struct nfsrv_descript {
  527         u_quad_t                nd_time;        /* Write deadline (usec) */
  528         off_t                   nd_off;         /* Start byte offset */
  529         off_t                   nd_eoff;        /* and end byte offset */
  530         LIST_ENTRY(nfsrv_descript) nd_hash;     /* Hash list */
  531         LIST_ENTRY(nfsrv_descript) nd_tq;               /* and timer list */
  532         LIST_HEAD(,nfsrv_descript) nd_coalesce; /* coalesced writes */
  533         SIMPLEQ_ENTRY(nfsrv_descript) nd_sendq; /* send reply list */
  534         struct mbuf             *nd_mrep;       /* Request mbuf list */
  535         struct mbuf             *nd_md;         /* Current dissect mbuf */
  536         struct mbuf             *nd_mreq;       /* Reply mbuf list */
  537         struct mbuf             *nd_nam;        /* and socket addr */
  538         struct mbuf             *nd_nam2;       /* return socket addr */
  539         void *                  nd_dpos;        /* Current dissect pos */
  540         u_int32_t               nd_procnum;     /* RPC # */
  541         int                     nd_stable;      /* storage type */
  542         int                     nd_flag;        /* nd_flag */
  543         int                     nd_len;         /* Length of this write */
  544         int                     nd_repstat;     /* Reply status */
  545         u_int32_t               nd_retxid;      /* Reply xid */
  546         u_int32_t               nd_duration;    /* Lease duration */
  547         struct timeval          nd_starttime;   /* Time RPC initiated */
  548         nfsrvfh_t               nd_fh;          /* File handle */
  549         kauth_cred_t            nd_cr;          /* Credentials */
  550 };
  551 
  552 /* Bits for "nd_flag" */
  553 #define ND_READ         LEASE_READ
  554 #define ND_WRITE        LEASE_WRITE
  555 #define ND_CHECK        0x04
  556 #define ND_LEASE        (ND_READ | ND_WRITE | ND_CHECK)
  557 #define ND_NFSV3        0x08
  558 #define ND_KERBNICK     0x20
  559 #define ND_KERBFULL     0x40
  560 #define ND_KERBAUTH     (ND_KERBNICK | ND_KERBFULL)
  561 
  562 extern kmutex_t nfsd_lock;
  563 extern kcondvar_t nfsd_initcv;
  564 extern TAILQ_HEAD(nfsdhead, nfsd) nfsd_head;
  565 extern SLIST_HEAD(nfsdidlehead, nfsd) nfsd_idle_head;
  566 extern int nfsd_head_flag;
  567 #define NFSD_CHECKSLP   0x01
  568 
  569 extern struct mowner nfs_mowner;
  570 extern struct nfsstats nfsstats;
  571 extern int nfs_numasync;
  572 
  573 /*
  574  * These macros compare nfsrv_descript structures.
  575  */
  576 #define NFSW_CONTIG(o, n) \
  577                 ((o)->nd_eoff >= (n)->nd_off && \
  578                  !memcmp((void *)&(o)->nd_fh, (void *)&(n)->nd_fh, NFSX_V3FH))
  579 
  580 /*
  581  * Defines for WebNFS
  582  */
  583 
  584 #define WEBNFS_ESC_CHAR         '%'
  585 #define WEBNFS_SPECCHAR_START   0x80
  586 
  587 #define WEBNFS_NATIVE_CHAR      0x80
  588 /*
  589  * ..
  590  * Possibly more here in the future.
  591  */
  592 
  593 /*
  594  * Macro for converting escape characters in WebNFS pathnames.
  595  * Should really be in libkern.
  596  */
  597 
  598 #define HEXTOC(c) \
  599         ((c) >= 'a' ? ((c) - ('a' - 10)) : \
  600             ((c) >= 'A' ? ((c) - ('A' - 10)) : ((c) - '')))
  601 #define HEXSTRTOI(p) \
  602         ((HEXTOC(p[0]) << 4) + HEXTOC(p[1]))
  603 
  604 /*
  605  * Structure holding information for a publicly exported filesystem
  606  * (WebNFS).  Currently the specs allow just for one such filesystem.
  607  */
  608 struct nfs_public {
  609         int             np_valid;       /* Do we hold valid information */
  610         fhandle_t       *np_handle;     /* Filehandle for pub fs (internal) */
  611         struct mount    *np_mount;      /* Mountpoint of exported fs */
  612         char            *np_index;      /* Index file */
  613 };
  614 #endif  /* _KERNEL */
  615 
  616 #endif /* _NFS_NFS_H */

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