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_fail_loc;
  33
  34 enum {
  35         OBD_FAIL_MDS = 0x100,
  36         OBD_FAIL_MDS_HANDLE_UNPACK,
  37         OBD_FAIL_MDS_GETATTR_NET,
  38         OBD_FAIL_MDS_GETATTR_PACK,
  39         OBD_FAIL_MDS_READPAGE_NET,
  40         OBD_FAIL_MDS_READPAGE_PACK,
  41         OBD_FAIL_MDS_READPAGE_BULK_NET,
  42         OBD_FAIL_MDS_SENDPAGE,
  43         OBD_FAIL_MDS_REINT_NET,
  44         OBD_FAIL_MDS_REINT_UNPACK,
  45         OBD_FAIL_MDS_REINT_SETATTR,
  46         OBD_FAIL_MDS_REINT_SETATTR_WRITE,
  47         OBD_FAIL_MDS_REINT_CREATE,
  48         OBD_FAIL_MDS_REINT_CREATE_WRITE,
  49         OBD_FAIL_MDS_REINT_UNLINK,
  50         OBD_FAIL_MDS_REINT_UNLINK_WRITE,
  51         OBD_FAIL_MDS_REINT_LINK,
  52         OBD_FAIL_MDS_REINT_LINK_WRITE,
  53         OBD_FAIL_MDS_REINT_RENAME,
  54         OBD_FAIL_MDS_REINT_RENAME_WRITE,
  55         OBD_FAIL_MDS_OPEN_NET,
  56         OBD_FAIL_MDS_OPEN_PACK,
  57         OBD_FAIL_MDS_CLOSE_NET,
  58         OBD_FAIL_MDS_CLOSE_PACK,
  59
  60         OBD_FAIL_OST = 0x200,
  61         OBD_FAIL_OST_CONNECT_NET,
  62         OBD_FAIL_OST_DISCONNECT_NET,
  63         OBD_FAIL_OST_GET_INFO_NET,
  64         OBD_FAIL_OST_CREATE_NET,
  65         OBD_FAIL_OST_DESTROY_NET,
  66         OBD_FAIL_OST_GETATTR_NET,
  67         OBD_FAIL_OST_SETATTR_NET,
  68         OBD_FAIL_OST_OPEN_NET,
  69         OBD_FAIL_OST_CLOSE_NET,
  70         OBD_FAIL_OST_BRW_NET,
  71         OBD_FAIL_OST_PUNCH_NET,
  72
  73         OBB_FAIL_LDLM = 0x300,
  74         OBD_FAIL_LDLM_ENQUEUE,
  75         OBD_FAIL_LDLM_CONVERT,
  76         OBD_FAIL_LDLM_CANCEL,
  77         OBD_FAIL_LDLM_CALLBACK,
  78
  79 };
  80
  81 /* preparation for a more advanced failure testbed (not functional yet) */
  82 #define OBD_FAIL_MASK_SYS    0x0000FF00
  83 #define OBD_FAIL_MASK_LOC    (0x000000FF | OBD_FAIL_MASK_SYS)
  84 #define OBD_FAIL_ONCE        0x80000000
  85 #define OBD_FAILED           0x40000000
  86 #define OBD_FAIL_MDS_ALL_NET 0x01000000
  87 #define OBD_FAIL_OST_ALL_NET 0x02000000
  88
  89 #define OBD_FAIL_CHECK(id)   ((obd_fail_loc & OBD_FAIL_MASK_LOC) == (id) &&  \
  90                               ((obd_fail_loc & (OBD_FAILED | OBD_FAIL_ONCE))!=\
  91                                 (OBD_FAILED | OBD_FAIL_ONCE)))
  92
  93 #define OBD_FAIL_RETURN(id, ret)                                             \
  94 do {                                                                         \
  95         if (OBD_FAIL_CHECK(id)) {                                            \
  96                 CERROR("obd_fail_loc=%x, fail operation rc=%d\n", id, ret);  \
  97                 obd_fail_loc |= OBD_FAILED;                                  \
  98                 RETURN(ret);                                                 \
  99         }                                                                    \
 100 } while(0)
 101
 102 #include <linux/blkdev.h>
 103
 104 static inline void OBD_FAIL_WRITE(int id, kdev_t dev)
 105 {
 106         if (OBD_FAIL_CHECK(id)) {
 107 #ifdef CONFIG_DEV_RDONLY
 108                 CERROR("obd_fail_loc=%x, fail write operation on %s\n",
 109                        id, bdevname(dev));
 110                 dev_set_rdonly(dev, 2);
 111 #else
 112                 CERROR("obd_fail_loc=%x, can't fail write operation on %s\n",
 113                        id, bdevname(dev));
 114 #endif
 115                 /* We set FAIL_ONCE because we never "un-fail" a device */
 116                 obd_fail_loc |= OBD_FAILED | OBD_FAIL_ONCE;
 117         }
 118 }
 119
 120 #define OBD_ALLOC(ptr, size)                                    \
 121 do {                                                            \
 122         long s = (size);                                        \
 123         (ptr) = kmalloc(s, GFP_KERNEL);                         \
 124         if ((ptr) == NULL) {                                    \
 125                 CERROR("kernel malloc of %ld bytes failed at "  \
 126                        "%s:%d\n", s, __FILE__, __LINE__);       \
 127         } else {                                                \
 128                 memset((ptr), 0, s);                            \
 129                 obd_memory += s;                                \
 130         }                                                       \
 131         CDEBUG(D_MALLOC, "kmalloced: %ld at %x (tot %ld).\n",   \
 132                s, (int)(ptr), obd_memory);                      \
 133 } while (0)
 134
 135 #define OBD_FREE(ptr, size)                                     \
 136 do {                                                            \
 137         int s = (size);                                         \
 138         kfree((ptr));                                           \
 139         CDEBUG(D_MALLOC, "kfreed: %d at %x (tot %ld).\n",       \
 140                s, (int)(ptr), obd_memory);                      \
 141         obd_memory -= s;                                        \
 142 } while (0)
 143
 144 #endif