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Annotation of 43BSDReno/sys/nfs/nfsrvcache.h, revision 1.1

1.1     ! root        1: /*
        !             2:  * Copyright (c) 1989 The Regents of the University of California.
        !             3:  * 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 is only permitted until one year after the first shipment
        !             9:  * of 4.4BSD by the Regents.  Otherwise, redistribution and use in source and
        !            10:  * binary forms are permitted provided that: (1) source distributions retain
        !            11:  * this entire copyright notice and comment, and (2) distributions including
        !            12:  * binaries display the following acknowledgement:  This product includes
        !            13:  * software developed by the University of California, Berkeley and its
        !            14:  * contributors'' in the documentation or other materials provided with the
        !            15:  * distribution and in all advertising materials mentioning features or use
        !            16:  * of this software.  Neither the name of the University nor the names of
        !            17:  * its contributors may be used to endorse or promote products derived from
        !            18:  * this software without specific prior written permission.
        !            19:  * THIS SOFTWARE IS PROVIDED AS IS'' AND WITHOUT ANY EXPRESS OR IMPLIED
        !            20:  * WARRANTIES, INCLUDING, WITHOUT LIMITATION, THE IMPLIED WARRANTIES OF
        !            21:  * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE.
        !            22:  *
        !            23:  *     @(#)nfsrvcache.h        7.3 (Berkeley) 6/28/90
        !            24:  */
        !            25: 
        !            26: /*
        !            27:  * Definitions for the server recent request cache
        !            28:  */
        !            29: 
        !            30: #define        NFSRVCACHESIZ   128
        !            31: #define        NFSRCHSZ        32
        !            32: 
        !            33: struct nfsrvcache {
        !            34:        struct  nfsrvcache *rc_chain[2];        /* Hash chain links */
        !            35:        struct  nfsrvcache *rc_next;    /* Lru list */
        !            36:        struct  nfsrvcache *rc_prev;
        !            37:        int     rc_state;               /* Current state of request */
        !            38:        int     rc_flag;                /* Flag bits */
        !            39:        struct  mbuf rc_nam;            /* Sockaddr of requestor */
        !            40:        u_long  rc_xid;                 /* rpc id number */
        !            41:        int     rc_proc;                /* rpc proc number */
        !            42:        long    rc_timestamp;           /* Time stamp */
        !            43:        union {
        !            44:                struct mbuf *rc_repmb;  /* Reply mbuf list OR */
        !            45:                int rc_repstat;         /* Reply status */
        !            46:        } rc_un;
        !            47: };
        !            48: 
        !            49: #define        rc_forw         rc_chain[0]
        !            50: #define        rc_back         rc_chain[1]
        !            51: #define        rc_status       rc_un.rc_repstat
        !            52: #define        rc_reply        rc_un.rc_repmb
        !            53: 
        !            54: #define        put_at_head(rp) \
        !            55:                (rp)->rc_prev->rc_next = (rp)->rc_next; \
        !            56:                (rp)->rc_next->rc_prev = (rp)->rc_prev; \
        !            57:                (rp)->rc_next = nfsrvcachehead.rc_next; \
        !            58:                (rp)->rc_next->rc_prev = (rp); \
        !            59:                nfsrvcachehead.rc_next = (rp); \
        !            60:                (rp)->rc_prev = &nfsrvcachehead
        !            61: 
        !            62: /* Cache entry states */
        !            63: #define        RC_UNUSED       0
        !            64: #define        RC_INPROG       1
        !            65: #define        RC_DONE         2
        !            66: 
        !            67: /* Return values */
        !            68: #define        RC_DROPIT       0
        !            69: #define        RC_REPLY        1
        !            70: #define        RC_DOIT         2
        !            71: 
        !            72: /* Flag bits */
        !            73: #define        RC_LOCKED       0x1
        !            74: #define        RC_WANTED       0x2
        !            75: #define        RC_REPSTATUS    0x4
        !            76: #define        RC_REPMBUF      0x8
        !            77: 
        !            78: /* Delay time after completion that request is dropped */
        !            79: #define        RC_DELAY        2               /* seconds */
        !            80: 

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