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

     /*-
      * SPDX-License-Identifier: BSD-2-Clause-FreeBSD
      *
      * Copyright (c) 2009 Rick Macklem, University of Guelph
      * All rights reserved.
      *
      * 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.
     *
     * THIS SOFTWARE IS PROVIDED BY THE AUTHOR 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 AUTHOR 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_NFSCL_H
    #define _NFS_NFSCL_H
    
    /*
     * Extra stuff for a NFSv4 nfsnode.
     * MALLOC'd to the correct length for the name and file handle.
     * n4_data has the file handle, followed by the file name.
     * The macro NFS4NODENAME() returns a pointer to the start of the
     * name.
     */
    struct nfsv4node {
            u_int16_t       n4_fhlen;
            u_int16_t       n4_namelen;
            u_int8_t        n4_data[1];
    };
    
    #define NFS4NODENAME(n) (&((n)->n4_data[(n)->n4_fhlen]))
    
    /*
     * Just a macro to convert the nfscl_reqstart arguments.
     */
    #define NFSCL_REQSTART(n, p, v)                                         \
            nfscl_reqstart((n), (p), VFSTONFS((v)->v_mount),                \
                VTONFS(v)->n_fhp->nfh_fh, VTONFS(v)->n_fhp->nfh_len, NULL,  \
                NULL, 0, 0)
    
    /*
     * These two macros convert between a lease duration and renew interval.
     * For now, just make the renew interval 1/2 the lease duration.
     * (They should be inverse operators.)
     */
    #define NFSCL_RENEW(l)  (((l) < 2) ? 1 : ((l) / 2))
    #define NFSCL_LEASE(r)  ((r) * 2)
    
    /* This macro checks to see if a forced dismount is about to occur. */
    #define NFSCL_FORCEDISM(m)      (((m)->mnt_kern_flag & MNTK_UNMOUNTF) != 0 || \
        (VFSTONFS(m)->nm_privflag & NFSMNTP_FORCEDISM) != 0)
    
    /*
     * These flag bits are used for the argument to nfscl_fillsattr() to
     * indicate special handling of the attributes.
     */
    #define NFSSATTR_FULL           0x1
    #define NFSSATTR_SIZE0          0x2
    #define NFSSATTR_SIZENEG1       0x4
    #define NFSSATTR_SIZERDEV       0x8
    
    /* Use this macro for debug printfs. */
    #define NFSCL_DEBUG(level, ...) do {                                    \
                    if (nfscl_debuglevel >= (level))                        \
                            printf(__VA_ARGS__);                            \
            } while (0)
    
    struct nfscl_reconarg {
            int     minorvers;
            uint8_t sessionid[NFSX_V4SESSIONID];
    };
    
    #endif  /* _NFS_NFSCL_H */

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