The Design and Implementation of the FreeBSD Operating System, Second Edition
Now available: The Design and Implementation of the FreeBSD Operating System (Second Edition)


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

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    1 /*-
    2  * Copyright (c) 2009 Rick Macklem, University of Guelph
    3  * All rights reserved.
    4  *
    5  * Redistribution and use in source and binary forms, with or without
    6  * modification, are permitted provided that the following conditions
    7  * are met:
    8  * 1. Redistributions of source code must retain the above copyright
    9  *    notice, this list of conditions and the following disclaimer.
   10  * 2. Redistributions in binary form must reproduce the above copyright
   11  *    notice, this list of conditions and the following disclaimer in the
   12  *    documentation and/or other materials provided with the distribution.
   13  *
   14  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
   15  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
   16  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
   17  * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
   18  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
   19  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
   20  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
   21  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
   22  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
   23  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
   24  * SUCH DAMAGE.
   25  *
   26  * $FreeBSD: releng/11.0/sys/fs/nfs/nfscl.h 244042 2012-12-08 22:52:39Z rmacklem $
   27  */
   28 
   29 #ifndef _NFS_NFSCL_H
   30 #define _NFS_NFSCL_H
   31 
   32 /*
   33  * Extra stuff for a NFSv4 nfsnode.
   34  * MALLOC'd to the correct length for the name and file handle.
   35  * n4_data has the file handle, followed by the file name.
   36  * The macro NFS4NODENAME() returns a pointer to the start of the
   37  * name.
   38  */
   39 struct nfsv4node {
   40         u_int16_t       n4_fhlen;
   41         u_int16_t       n4_namelen;
   42         u_int8_t        n4_data[1];
   43 };
   44 
   45 #define NFS4NODENAME(n) (&((n)->n4_data[(n)->n4_fhlen]))
   46 
   47 /*
   48  * Just a macro to convert the nfscl_reqstart arguments.
   49  */
   50 #define NFSCL_REQSTART(n, p, v)                                         \
   51         nfscl_reqstart((n), (p), VFSTONFS((v)->v_mount),                \
   52             VTONFS(v)->n_fhp->nfh_fh, VTONFS(v)->n_fhp->nfh_len, NULL, NULL)
   53 
   54 /*
   55  * These two macros convert between a lease duration and renew interval.
   56  * For now, just make the renew interval 1/2 the lease duration.
   57  * (They should be inverse operators.)
   58  */
   59 #define NFSCL_RENEW(l)  (((l) < 2) ? 1 : ((l) / 2))
   60 #define NFSCL_LEASE(r)  ((r) * 2)
   61 
   62 /*
   63  * These flag bits are used for the argument to nfscl_fillsattr() to
   64  * indicate special handling of the attributes.
   65  */
   66 #define NFSSATTR_FULL           0x1
   67 #define NFSSATTR_SIZE0          0x2
   68 #define NFSSATTR_SIZENEG1       0x4
   69 #define NFSSATTR_SIZERDEV       0x8
   70 
   71 /* Use this macro for debug printfs. */
   72 #define NFSCL_DEBUG(level, ...) do {                                    \
   73                 if (nfscl_debuglevel >= (level))                        \
   74                         printf(__VA_ARGS__);                            \
   75         } while (0)
   76 
   77 #endif  /* _NFS_NFSCL_H */

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