nfsrvcache.h

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    1 /*-
    2  * Copyright (c) 1989, 1993
    3  *      The Regents of the University of California.  All rights reserved.
    4  *
    5  * This code is derived from software contributed to Berkeley by
    6  * Rick Macklem at The University of Guelph.
    7  *
    8  * Redistribution and use in source and binary forms, with or without
    9  * modification, are permitted provided that the following conditions
   10  * are met:
   11  * 1. Redistributions of source code must retain the above copyright
   12  *    notice, this list of conditions and the following disclaimer.
   13  * 2. Redistributions in binary form must reproduce the above copyright
   14  *    notice, this list of conditions and the following disclaimer in the
   15  *    documentation and/or other materials provided with the distribution.
   16  * 4. Neither the name of the University nor the names of its contributors
   17  *    may be used to endorse or promote products derived from this software
   18  *    without specific prior written permission.
   19  *
   20  * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
   21  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
   22  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
   23  * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
   24  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
   25  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
   26  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
   27  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
   28  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
   29  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
   30  * SUCH DAMAGE.
   31  *
   32  * $FreeBSD: releng/11.0/sys/fs/nfs/nfsrvcache.h 269347 2014-07-31 19:24:44Z kib $
   33  */
   34 
   35 #ifndef _NFS_NFSRVCACHE_H_
   36 #define _NFS_NFSRVCACHE_H_
   37 
   38 /*
   39  * Definitions for the server recent request cache
   40  */
   41 #define NFSRVCACHE_MAX_SIZE     2048
   42 #define NFSRVCACHE_MIN_SIZE       64
   43 
   44 #define NFSRVCACHE_HASHSIZE     500
   45 
   46 /* Cache table entry. */
   47 struct nfsrvcache {
   48         LIST_ENTRY(nfsrvcache) rc_hash;         /* Hash chain */
   49         LIST_ENTRY(nfsrvcache) rc_ahash;        /* ACK hash chain */
   50         TAILQ_ENTRY(nfsrvcache) rc_lru;         /* UDP lru chain */
   51         u_int32_t       rc_xid;                 /* rpc id number */
   52         time_t          rc_timestamp;           /* Time done */
   53         union {
   54                 mbuf_t repmb;                   /* Reply mbuf list OR */
   55                 int repstat;                    /* Reply status */
   56         } rc_un;
   57         union {
   58                 struct {
   59                         union nethostaddr haddr; /* Host address */
   60                 } udp;
   61                 struct {
   62                         u_int64_t       sockref;
   63                         u_int32_t       len;
   64                         u_int32_t       tcpseq;
   65                         int16_t         refcnt;
   66                         u_int16_t       cksum;
   67                         time_t          cachetime;
   68                         int             acked;
   69                 } ot;
   70         } rc_un2;
   71         u_int16_t       rc_proc;                /* rpc proc number */
   72         u_int16_t       rc_flag;                /* Flag bits */
   73 };
   74 
   75 #define rc_reply        rc_un.repmb
   76 #define rc_status       rc_un.repstat
   77 #define rc_inet         rc_un2.udp.haddr.had_inet.s_addr
   78 #define rc_inet6        rc_un2.udp.haddr.had_inet6
   79 #define rc_haddr        rc_un2.udp.haddr
   80 #define rc_sockref      rc_un2.ot.sockref
   81 #define rc_tcpseq       rc_un2.ot.tcpseq
   82 #define rc_refcnt       rc_un2.ot.refcnt
   83 #define rc_reqlen       rc_un2.ot.len
   84 #define rc_cksum        rc_un2.ot.cksum
   85 #define rc_cachetime    rc_un2.ot.cachetime
   86 #define rc_acked        rc_un2.ot.acked
   87 
   88 /* TCP ACK values */
   89 #define RC_NO_SEQ               0
   90 #define RC_NO_ACK               1
   91 #define RC_ACK                  2
   92 #define RC_NACK                 3
   93 
   94 /* Return values */
   95 #define RC_DROPIT               0
   96 #define RC_REPLY                1
   97 #define RC_DOIT                 2
   98 
   99 /* Flag bits */
  100 #define RC_LOCKED       0x0001
  101 #define RC_WANTED       0x0002
  102 #define RC_REPSTATUS    0x0004
  103 #define RC_REPMBUF      0x0008
  104 #define RC_UDP          0x0010
  105 #define RC_INETIPV6     0x0020
  106 #define RC_INPROG       0x0040
  107 #define RC_NFSV2        0x0100
  108 #define RC_NFSV3        0x0200
  109 #define RC_NFSV4        0x0400
  110 #define RC_NFSVERS      (RC_NFSV2 | RC_NFSV3 | RC_NFSV4)
  111 #define RC_REFCNT       0x0800
  112 #define RC_SAMETCPCONN  0x1000
  113 
  114 LIST_HEAD(nfsrvhashhead, nfsrvcache);
  115 
  116 /* The fine-grained locked cache hash table for TCP. */
  117 struct nfsrchash_bucket {
  118         struct mtx              mtx;
  119         struct nfsrvhashhead    tbl;
  120 };
  121 
  122 #endif  /* _NFS_NFSRVCACHE_H_ */

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

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