usr.bin/fstat/hammer.c

   1 /*
   2  * Copyright (c) 2013 The DragonFly Project.  All rights reserved.
   3  *
   4  * Redistribution and use in source and binary forms, with or without
   5  * modification, are permitted provided that the following conditions
   6  * are met:
   7  *
   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
  12  *    the documentation and/or other materials provided with the
  13  *    distribution.
  14  * 3. Neither the name of The DragonFly Project nor the names of its
  15  *    contributors may be used to endorse or promote products derived
  16  *    from this software without specific, prior written permission.
  17  *
  18  * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
  19  * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
  20  * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
  21  * FOR A PARTICULAR PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE
  22  * COPYRIGHT HOLDERS OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
  23  * INCIDENTAL, SPECIAL, EXEMPLARY OR CONSEQUENTIAL DAMAGES (INCLUDING,
  24  * BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
  25  * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED
  26  * AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
  27  * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT
  28  * OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
  29  * SUCH DAMAGE.
  30  */
  31
  32 #define _KERNEL_STRUCTURES
  33
  34 #include <sys/param.h>
  35 #include <sys/stat.h>
  36 #include <sys/time.h>
  37
  38 #include <kvm.h>
  39 #include <stdio.h>
  40
  41 #include <sys/vnode.h>
  42 #include <sys/mount.h>
  43 #include <stddef.h>
  44 #include <vfs/hammer/hammer.h>
  45
  46 #include "fstat.h"
  47
  48 int
  49 hammer_filestat(struct vnode *vp, struct filestat *fsp)
  50 {
  51         struct hammer_inode ino;
  52         struct hammer_pseudofs_inmem pfsm;
  53
  54         if (!kread(VTOI(vp), &ino, sizeof(ino))) {
  55                 dprintf(stderr, "can't read hammer_inode at %p for pid %d\n",
  56                     (void *)VTOI(vp), Pid);
  57                 return 0;
  58         }
  59
  60         if (!kread(ino.pfsm, &pfsm, sizeof(pfsm))) {
  61                 dprintf(stderr, "can't read hammer_pseudofs_inmem"
  62                     " at %p for pid %d\n", (void *)ino.pfsm, Pid);
  63                 return 0;
  64         }
  65         fsp->fsid = pfsm.fsid_udev ^ (uint32_t)ino.obj_asof ^
  66             (uint32_t)(ino.obj_asof >> 32);
  67         fsp->mode = ino.ino_data.mode | mtrans(vp->v_type);
  68         fsp->fileid = (long)ino.ino_leaf.base.obj_id;
  69         fsp->size = ino.ino_data.size;
  70         fsp->rdev = fstat_dev2udev(vp->v_rdev);
  71         return 1;
  72 }