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 #define OBD_FAIL_MDS                     0x100
  35 #define OBD_FAIL_MDS_HANDLE_UNPACK       0x101
  36 #define OBD_FAIL_MDS_GETATTR_NET         0x102
  37 #define OBD_FAIL_MDS_GETATTR_PACK        0x103
  38 #define OBD_FAIL_MDS_READPAGE_NET        0x104
  39 #define OBD_FAIL_MDS_READPAGE_PACK       0x105
  40 #define OBD_FAIL_MDS_SENDPAGE            0x106
  41 #define OBD_FAIL_MDS_REINT_NET           0x107
  42 #define OBD_FAIL_MDS_REINT_UNPACK        0x108
  43 #define OBD_FAIL_MDS_REINT_SETATTR       0x109
  44 #define OBD_FAIL_MDS_REINT_SETATTR_WRITE 0x10a
  45 #define OBD_FAIL_MDS_REINT_CREATE        0x10b
  46 #define OBD_FAIL_MDS_REINT_CREATE_WRITE  0x10c
  47 #define OBD_FAIL_MDS_REINT_UNLINK        0x10d
  48 #define OBD_FAIL_MDS_REINT_UNLINK_WRITE  0x10e
  49 #define OBD_FAIL_MDS_REINT_LINK          0x10f
  50 #define OBD_FAIL_MDS_REINT_LINK_WRITE    0x110
  51 #define OBD_FAIL_MDS_REINT_RENAME        0x111
  52 #define OBD_FAIL_MDS_REINT_RENAME_WRITE  0x112
  53 #define OBD_FAIL_MDS_OPEN_NET            0x113
  54 #define OBD_FAIL_MDS_OPEN_PACK           0x114
  55 #define OBD_FAIL_MDS_CLOSE_NET           0x115
  56 #define OBD_FAIL_MDS_CLOSE_PACK          0x116
  57 #define OBD_FAIL_MDS_CONNECT_NET         0x117
  58 #define OBD_FAIL_MDS_CONNECT_PACK        0x118
  59 #define OBD_FAIL_MDS_REINT_NET_REP       0x119
  60 #define OBD_FAIL_MDS_DISCONNECT_NET      0x11a
  61 #define OBD_FAIL_MDS_GETSTATUS_NET       0x11b
  62 #define OBD_FAIL_MDS_GETSTATUS_PACK      0x11c
  63
  64 #define OBD_FAIL_OST                     0x200
  65 #define OBD_FAIL_OST_CONNECT_NET         0x201
  66 #define OBD_FAIL_OST_DISCONNECT_NET      0x202
  67 #define OBD_FAIL_OST_GET_INFO_NET        0x203
  68 #define OBD_FAIL_OST_CREATE_NET          0x204
  69 #define OBD_FAIL_OST_DESTROY_NET         0x205
  70 #define OBD_FAIL_OST_GETATTR_NET         0x206
  71 #define OBD_FAIL_OST_SETATTR_NET         0x207
  72 #define OBD_FAIL_OST_OPEN_NET            0x208
  73 #define OBD_FAIL_OST_CLOSE_NET           0x209
  74 #define OBD_FAIL_OST_BRW_NET             0x20a
  75 #define OBD_FAIL_OST_PUNCH_NET           0x20b
  76 #define OBD_FAIL_OST_STATFS_NET          0x20c
  77
  78 #define OBB_FAIL_LDLM                    0x300
  79 #define OBD_FAIL_LDLM_NAMESPACE_NEW      0x301
  80 #define OBD_FAIL_LDLM_ENQUEUE            0x302
  81 #define OBD_FAIL_LDLM_CONVERT            0x303
  82 #define OBD_FAIL_LDLM_CANCEL             0x304
  83 #define OBD_FAIL_LDLM_CALLBACK           0x305
  84
  85 /* preparation for a more advanced failure testbed (not functional yet) */
  86 #define OBD_FAIL_MASK_SYS    0x0000FF00
  87 #define OBD_FAIL_MASK_LOC    (0x000000FF | OBD_FAIL_MASK_SYS)
  88 #define OBD_FAIL_ONCE        0x80000000
  89 #define OBD_FAILED           0x40000000
  90 #define OBD_FAIL_MDS_ALL_NET 0x01000000
  91 #define OBD_FAIL_OST_ALL_NET 0x02000000
  92
  93 #define OBD_FAIL_CHECK(id)   ((obd_fail_loc & OBD_FAIL_MASK_LOC) == (id) &&  \
  94                               ((obd_fail_loc & (OBD_FAILED | OBD_FAIL_ONCE))!=\
  95                                 (OBD_FAILED | OBD_FAIL_ONCE)))
  96
  97 #define OBD_FAIL_RETURN(id, ret)                                             \
  98 do {                                                                         \
  99         if (OBD_FAIL_CHECK(id)) {                                            \
 100                 CERROR("obd_fail_loc=%x, fail operation rc=%d\n", id, ret);  \
 101                 obd_fail_loc |= OBD_FAILED;                                  \
 102                 if ((id) & OBD_FAIL_ONCE)                                    \
 103                         obd_fail_loc |= OBD_FAIL_ONCE;                       \
 104                 RETURN(ret);                                                 \
 105         }                                                                    \
 106 } while(0)
 107
 108 #include <linux/types.h>
 109 #include <linux/blkdev.h>
 110
 111 static inline void OBD_FAIL_WRITE(int id, kdev_t dev)
 112 {
 113         if (OBD_FAIL_CHECK(id)) {
 114 #ifdef CONFIG_DEV_RDONLY
 115                 CERROR("obd_fail_loc=%x, fail write operation on %s\n",
 116                        id, bdevname(dev));
 117                 dev_set_rdonly(dev, 2);
 118 #else
 119                 CERROR("obd_fail_loc=%x, can't fail write operation on %s\n",
 120                        id, bdevname(dev));
 121 #endif
 122                 /* We set FAIL_ONCE because we never "un-fail" a device */
 123                 obd_fail_loc |= OBD_FAILED | OBD_FAIL_ONCE;
 124         }
 125 }
 126
 127 #define OBD_ALLOC(ptr, size)                                            \
 128 do {                                                                    \
 129         long s = (size);                                                \
 130         (ptr) = kmalloc(s, GFP_KERNEL);                                 \
 131         if ((ptr) == NULL) {                                            \
 132                 CERROR("kmalloc of '" #ptr "' (%ld bytes) failed "      \
 133                        "at %s:%d\n", s, __FILE__, __LINE__);            \
 134         } else {                                                        \
 135                 memset((ptr), 0, s);                                    \
 136                 obd_memory += s;                                        \
 137                 CDEBUG(D_MALLOC, "kmalloced '" #ptr "': %ld at "        \
 138                        "%p (tot %ld).\n", s, (ptr), obd_memory);        \
 139         }                                                               \
 140 } while (0)
 141
 142 #define OBD_FREE(ptr, size)                                             \
 143 do {                                                                    \
 144         int s = (size);                                                 \
 145         kfree((ptr));                                                   \
 146         obd_memory -= s;                                                \
 147         CDEBUG(D_MALLOC, "kfreed '" #ptr "': %d at %p (tot %ld).\n",    \
 148                s, (ptr), obd_memory);                                   \
 149 } while (0)
 150
 151 #endif