sys/sys/statvfs.h

   1 /*
   2  * Copyright (c) 2005 The DragonFly Project.  All rights reserved.
   3  *
   4  * This code is derived from software contributed to The DragonFly Project
   5  * by Jeroen Ruigrok van der Werven <asmodai@tendra.org>
   6  *
   7  * Redistribution and use in source and binary forms, with or without
   8  * modification, are permitted provided that the following conditions
   9  * are met:
  10  *
  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
  15  *    the documentation and/or other materials provided with the
  16  *    distribution.
  17  * 3. Neither the name of The DragonFly Project nor the names of its
  18  *    contributors may be used to endorse or promote products derived
  19  *    from this software without specific, prior written permission.
  20  *
  21  * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
  22  * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
  23  * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
  24  * FOR A PARTICULAR PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE
  25  * COPYRIGHT HOLDERS OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
  26  * INCIDENTAL, SPECIAL, EXEMPLARY OR CONSEQUENTIAL DAMAGES (INCLUDING,
  27  * BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
  28  * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED
  29  * AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
  30  * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT
  31  * OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
  32  * SUCH DAMAGE.
  33  *
  34  * $DragonFly: src/sys/sys/statvfs.h,v 1.10 2008/06/02 16:55:08 dillon Exp $
  35  */
  36
  37 #ifndef _SYS_STATVFS_H_
  38 #define _SYS_STATVFS_H_
  39
  40 #include <sys/types.h>
  41 #include <sys/uuid.h>
  42
  43 struct fhandle;
  44 struct statfs;
  45
  46 /*
  47  * The POSIX 1003.1 standard uses free and available nomenclature to mean the
  48  * following:
  49  * - free means all space, including privileged processes,
  50  * - avail means all space available to unprivileged processes.
  51  */
  52
  53 struct statvfs {
  54         unsigned long   f_bsize;        /* file system block size */
  55         unsigned long   f_frsize;       /* fundamental file system block size */
  56         fsblkcnt_t      f_blocks;       /* total number of blocks on fs */
  57         fsblkcnt_t      f_bfree;        /* total number of free blocks */
  58         fsblkcnt_t      f_bavail;       /* total number of available blocks */
  59         fsfilcnt_t      f_files;        /* total number of file serial num */
  60         fsfilcnt_t      f_ffree;        /* total number of free file ser num */
  61         fsfilcnt_t      f_favail;       /* total number of avail file ser num */
  62         unsigned long   f_fsid;         /* file system ID */
  63         unsigned long   f_flag;         /* bit mask of f_flag values */
  64         unsigned long   f_namemax;      /* maximum filename length */
  65         uid_t           f_owner;        /* user that mounted the filesystem */
  66         unsigned int    f_type;         /* filesystem type */
  67
  68         uint64_t        f_syncreads;    /* count of sync reads since mount */
  69         uint64_t        f_syncwrites;   /* count of sync writes since mount */
  70
  71         uint64_t        f_asyncreads;   /* count of async reads since mount */
  72         uint64_t        f_asyncwrites;  /* count of async writes since mount */
  73
  74         /*
  75          * DragonFly extensions - full uuid FSID and owner
  76          */
  77         uuid_t          f_fsid_uuid;
  78         uuid_t          f_uid_uuid;
  79 };
  80
  81 /*
  82  * f_flag definitions
  83  */
  84 #define ST_RDONLY       0x00000001      /* fs is read-only */
  85 #define ST_NOSUID       0x00000002      /* ST_ISUID or ST_ISGID not supported */
  86
  87 /*
  88  * DragonFly specific flags
  89  */
  90 #define ST_FSID_UUID    0x40000000      /* f_fsid_uuid field is valid */
  91 #define ST_OWNER_UUID   0x80000000      /* f_owner_uuid field is valid */
  92
  93 __BEGIN_DECLS
  94 int     fstatvfs(int, struct statvfs *);
  95 int     statvfs(const char * __restrict, struct statvfs * __restrict);
  96 int     fhstatvfs (const struct fhandle *, struct statvfs * __restrict);
  97 int     getvfsstat (struct statfs * __restrict, struct statvfs * __restrict, long, int);
  98
  99 __END_DECLS
 100
 101 #endif /* _SYS_STATVFS_H_ */