lustre/include/linux/obd_support.h

   1 /* -*- mode: c; c-basic-offset: 8; indent-tabs-mode: nil; -*-
   2  * vim:expandtab:shiftwidth=8:tabstop=8:
   3  *
   4  *  Copyright (C) 2001, 2002 Cluster File Systems, Inc.
   5  *
   6  *   This file is part of Lustre, http://www.lustre.org.
   7  *
   8  *   Lustre is free software; you can redistribute it and/or
   9  *   modify it under the terms of version 2 of the GNU General Public
  10  *   License as published by the Free Software Foundation.
  11  *
  12  *   Lustre is distributed in the hope that it will be useful,
  13  *   but WITHOUT ANY WARRANTY; without even the implied warranty of
  14  *   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  15  *   GNU General Public License for more details.
  16  *
  17  *   You should have received a copy of the GNU General Public License
  18  *   along with Lustre; if not, write to the Free Software
  19  *   Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
  20  *
  21  */
  22
  23 #ifndef _OBD_SUPPORT
  24 #define _OBD_SUPPORT
  25
  26 #include <linux/autoconf.h>
  27 #include <linux/slab.h>
  28 #include <linux/kp30.h>
  29
  30 /* global variables */
  31 extern unsigned long obd_memory;
  32 extern unsigned long obd_drop_packet;
  33
  34 enum {
  35         OBD_INST_MDS_GETATTR = 1,
  36         OBD_INST_MDS_READPAGE,
  37         OBD_INST_MDS_READPAGE_BULK,
  38         OBD_INST_MDS_REINT,
  39         OBD_INST_MDS_OPEN,
  40         OBD_INST_MDS_CLOSE,
  41         OBD_INST_OST_CONNECT,
  42         OBD_INST_OST_DISCONNECT,
  43         OBD_INST_OST_GET_INFO,
  44         OBD_INST_OST_CREATE,
  45         OBD_INST_OST_DESTROY,
  46         OBD_INST_OST_GETATTR,
  47         OBD_INST_OST_SETATTR,
  48         OBD_INST_OST_OPEN,
  49         OBD_INST_OST_CLOSE,
  50         OBD_INST_OST_BRW,
  51         OBD_INST_OST_PUNCH
  52 };
  53
  54 #define OBD_CHECK_DROP_PACKET(req, id)                                  \
  55 do {                                                                    \
  56         if (obd_drop_packet != id)                                      \
  57                 break;                                                  \
  58                                                                         \
  59         CDEBUG(D_OTHER, "obd_drop_packet=%d, dropping packet.\n", id);  \
  60         RETURN(0);                                                      \
  61 } while(0)
  62
  63 #define OBD_ALLOC(ptr, size)                                    \
  64 do {                                                            \
  65         long s = (size);                                        \
  66         (ptr) = kmalloc(s, GFP_KERNEL);                         \
  67         if ((ptr) == NULL) {                                    \
  68                 CERROR("kernel malloc of %ld bytes failed at "  \
  69                        "%s:%d\n", s, __FILE__, __LINE__);       \
  70         } else {                                                \
  71                 memset((ptr), 0, s);                            \
  72                 obd_memory += s;                                \
  73         }                                                       \
  74         CDEBUG(D_MALLOC, "kmalloced: %ld at %x (tot %ld).\n",   \
  75                s, (int)(ptr), obd_memory);                      \
  76 } while (0)
  77
  78 #define OBD_FREE(ptr, size)                                     \
  79 do {                                                            \
  80         int s = (size);                                         \
  81         kfree((ptr));                                           \
  82         CDEBUG(D_MALLOC, "kfreed: %d at %x (tot %ld).\n",       \
  83                s, (int)(ptr), obd_memory);                      \
  84         obd_memory -= s;                                        \
  85 } while (0)
  86
  87 #endif