lustre/include/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 <libcfs/kp30.h>
  27
  28 /* global variables */
  29 extern atomic_t obd_memory;
  30 extern int obd_memmax;
  31 extern unsigned int obd_fail_loc;
  32 extern unsigned int obd_dump_on_timeout;
  33 extern unsigned int obd_dump_on_eviction;
  34 extern unsigned int obd_timeout;          /* seconds */
  35 #define PING_INTERVAL max(obd_timeout / 4, 1U)
  36 #define RECONNECT_INTERVAL max(obd_timeout / 10, 10U)
  37 extern unsigned int ldlm_timeout;
  38 extern unsigned int obd_health_check_timeout;
  39 extern unsigned int obd_sync_filter;
  40 extern unsigned int obd_max_dirty_pages;
  41 extern atomic_t obd_dirty_pages;
  42 extern cfs_waitq_t obd_race_waitq;
  43 extern int obd_race_state;
  44
  45
  46 #define OBD_FAIL_MDS                     0x100
  47 #define OBD_FAIL_MDS_HANDLE_UNPACK       0x101
  48 #define OBD_FAIL_MDS_GETATTR_NET         0x102
  49 #define OBD_FAIL_MDS_GETATTR_PACK        0x103
  50 #define OBD_FAIL_MDS_READPAGE_NET        0x104
  51 #define OBD_FAIL_MDS_READPAGE_PACK       0x105
  52 #define OBD_FAIL_MDS_SENDPAGE            0x106
  53 #define OBD_FAIL_MDS_REINT_NET           0x107
  54 #define OBD_FAIL_MDS_REINT_UNPACK        0x108
  55 #define OBD_FAIL_MDS_REINT_SETATTR       0x109
  56 #define OBD_FAIL_MDS_REINT_SETATTR_WRITE 0x10a
  57 #define OBD_FAIL_MDS_REINT_CREATE        0x10b
  58 #define OBD_FAIL_MDS_REINT_CREATE_WRITE  0x10c
  59 #define OBD_FAIL_MDS_REINT_UNLINK        0x10d
  60 #define OBD_FAIL_MDS_REINT_UNLINK_WRITE  0x10e
  61 #define OBD_FAIL_MDS_REINT_LINK          0x10f
  62 #define OBD_FAIL_MDS_REINT_LINK_WRITE    0x110
  63 #define OBD_FAIL_MDS_REINT_RENAME        0x111
  64 #define OBD_FAIL_MDS_REINT_RENAME_WRITE  0x112
  65 #define OBD_FAIL_MDS_OPEN_NET            0x113
  66 #define OBD_FAIL_MDS_OPEN_PACK           0x114
  67 #define OBD_FAIL_MDS_CLOSE_NET           0x115
  68 #define OBD_FAIL_MDS_CLOSE_PACK          0x116
  69 #define OBD_FAIL_MDS_CONNECT_NET         0x117
  70 #define OBD_FAIL_MDS_CONNECT_PACK        0x118
  71 #define OBD_FAIL_MDS_REINT_NET_REP       0x119
  72 #define OBD_FAIL_MDS_DISCONNECT_NET      0x11a
  73 #define OBD_FAIL_MDS_GETSTATUS_NET       0x11b
  74 #define OBD_FAIL_MDS_GETSTATUS_PACK      0x11c
  75 #define OBD_FAIL_MDS_STATFS_PACK         0x11d
  76 #define OBD_FAIL_MDS_STATFS_NET          0x11e
  77 #define OBD_FAIL_MDS_GETATTR_NAME_NET    0x11f
  78 #define OBD_FAIL_MDS_PIN_NET             0x120
  79 #define OBD_FAIL_MDS_UNPIN_NET           0x121
  80 #define OBD_FAIL_MDS_ALL_REPLY_NET       0x122
  81 #define OBD_FAIL_MDS_ALL_REQUEST_NET     0x123
  82 #define OBD_FAIL_MDS_SYNC_NET            0x124
  83 #define OBD_FAIL_MDS_SYNC_PACK           0x125
  84 #define OBD_FAIL_MDS_DONE_WRITING_NET    0x126
  85 #define OBD_FAIL_MDS_DONE_WRITING_PACK   0x127
  86 #define OBD_FAIL_MDS_ALLOC_OBDO          0x128
  87 #define OBD_FAIL_MDS_PAUSE_OPEN          0x129
  88 #define OBD_FAIL_MDS_STATFS_LCW_SLEEP    0x12a
  89 #define OBD_FAIL_MDS_OPEN_CREATE         0x12b
  90 #define OBD_FAIL_MDS_OST_SETATTR         0x12c
  91 #define OBD_FAIL_MDS_QUOTACHECK_NET      0x12d
  92 #define OBD_FAIL_MDS_QUOTACTL_NET        0x12e
  93 #define OBD_FAIL_MDS_CLIENT_ADD          0x12f
  94 #define OBD_FAIL_MDS_GETXATTR_NET        0x130
  95 #define OBD_FAIL_MDS_GETXATTR_PACK       0x131
  96 #define OBD_FAIL_MDS_SETXATTR_NET        0x132
  97 #define OBD_FAIL_MDS_SETXATTR            0x133
  98 #define OBD_FAIL_MDS_SETXATTR_WRITE      0x134
  99 #define OBD_FAIL_MDS_FS_SETUP            0x135
 100 #define OBD_FAIL_MDS_RESEND              0x136
 101
 102 #define OBD_FAIL_OST                     0x200
 103 #define OBD_FAIL_OST_CONNECT_NET         0x201
 104 #define OBD_FAIL_OST_DISCONNECT_NET      0x202
 105 #define OBD_FAIL_OST_GET_INFO_NET        0x203
 106 #define OBD_FAIL_OST_CREATE_NET          0x204
 107 #define OBD_FAIL_OST_DESTROY_NET         0x205
 108 #define OBD_FAIL_OST_GETATTR_NET         0x206
 109 #define OBD_FAIL_OST_SETATTR_NET         0x207
 110 #define OBD_FAIL_OST_OPEN_NET            0x208
 111 #define OBD_FAIL_OST_CLOSE_NET           0x209
 112 #define OBD_FAIL_OST_BRW_NET             0x20a
 113 #define OBD_FAIL_OST_PUNCH_NET           0x20b
 114 #define OBD_FAIL_OST_STATFS_NET          0x20c
 115 #define OBD_FAIL_OST_HANDLE_UNPACK       0x20d
 116 #define OBD_FAIL_OST_BRW_WRITE_BULK      0x20e
 117 #define OBD_FAIL_OST_BRW_READ_BULK       0x20f
 118 #define OBD_FAIL_OST_SYNC_NET            0x210
 119 #define OBD_FAIL_OST_ALL_REPLY_NET       0x211
 120 #define OBD_FAIL_OST_ALL_REQUESTS_NET    0x212
 121 #define OBD_FAIL_OST_LDLM_REPLY_NET      0x213
 122 #define OBD_FAIL_OST_BRW_PAUSE_BULK      0x214
 123 #define OBD_FAIL_OST_ENOSPC              0x215
 124 #define OBD_FAIL_OST_EROFS               0x216
 125 #define OBD_FAIL_OST_ENOENT              0x217
 126 #define OBD_FAIL_OST_QUOTACHECK_NET      0x218
 127 #define OBD_FAIL_OST_QUOTACTL_NET        0x219
 128 #define OBD_FAIL_OST_CHECKSUM_RECEIVE    0x21a
 129 #define OBD_FAIL_OST_CHECKSUM_SEND       0x21b
 130 #define OBD_FAIL_OST_BRW_SIZE            0x21c
 131 #define OBD_FAIL_OST_DROP_REQ            0x21d
 132 #define OBD_FAIL_OST_SETATTR_CREDITS     0x21e
 133
 134 #define OBD_FAIL_LDLM                    0x300
 135 #define OBD_FAIL_LDLM_NAMESPACE_NEW      0x301
 136 #define OBD_FAIL_LDLM_ENQUEUE            0x302
 137 #define OBD_FAIL_LDLM_CONVERT            0x303
 138 #define OBD_FAIL_LDLM_CANCEL             0x304
 139 #define OBD_FAIL_LDLM_BL_CALLBACK        0x305
 140 #define OBD_FAIL_LDLM_CP_CALLBACK        0x306
 141 #define OBD_FAIL_LDLM_GL_CALLBACK        0x307
 142 #define OBD_FAIL_LDLM_ENQUEUE_EXTENT_ERR 0x308
 143 #define OBD_FAIL_LDLM_ENQUEUE_INTENT_ERR 0x309
 144 #define OBD_FAIL_LDLM_CREATE_RESOURCE    0x30a
 145 #define OBD_FAIL_LDLM_ENQUEUE_BLOCKED    0x30b
 146 #define OBD_FAIL_LDLM_REPLY              0x30c
 147 #define OBD_FAIL_LDLM_RECOV_CLIENTS      0x30d
 148 #define OBD_FAIL_LDLM_ENQUEUE_OLD_EXPORT 0x30e
 149 #define OBD_FAIL_LDLM_GLIMPSE            0x30f
 150
 151 #define OBD_FAIL_OSC                     0x400
 152 #define OBD_FAIL_OSC_BRW_READ_BULK       0x401
 153 #define OBD_FAIL_OSC_BRW_WRITE_BULK      0x402
 154 #define OBD_FAIL_OSC_LOCK_BL_AST         0x403
 155 #define OBD_FAIL_OSC_LOCK_CP_AST         0x404
 156 #define OBD_FAIL_OSC_MATCH               0x405
 157 #define OBD_FAIL_OSC_BRW_PREP_REQ        0x406
 158 #define OBD_FAIL_OSC_SHUTDOWN            0x407
 159 #define OBD_FAIL_OSC_CHECKSUM_RECEIVE    0x408
 160 #define OBD_FAIL_OSC_CHECKSUM_SEND       0x409
 161
 162 #define OBD_FAIL_PTLRPC                  0x500
 163 #define OBD_FAIL_PTLRPC_ACK              0x501
 164 #define OBD_FAIL_PTLRPC_RQBD             0x502
 165 #define OBD_FAIL_PTLRPC_BULK_GET_NET     0x503
 166 #define OBD_FAIL_PTLRPC_BULK_PUT_NET     0x504
 167 #define OBD_FAIL_PTLRPC_DROP_RPC         0x505
 168 #define OBD_FAIL_PTLRPC_DELAY_SEND       0x506
 169
 170 #define OBD_FAIL_OBD_PING_NET            0x600
 171 #define OBD_FAIL_OBD_LOG_CANCEL_NET      0x601
 172 #define OBD_FAIL_OBD_LOGD_NET            0x602
 173 #define OBD_FAIL_OBD_QC_CALLBACK_NET     0x603
 174 #define OBD_FAIL_OBD_DQACQ               0x604
 175
 176 #define OBD_FAIL_TGT_REPLY_NET           0x700
 177 #define OBD_FAIL_TGT_CONN_RACE           0x701
 178 #define OBD_FAIL_TGT_FORCE_RECONNECT     0x702
 179 #define OBD_FAIL_TGT_DELAY_CONNECT       0x703
 180 #define OBD_FAIL_TGT_DELAY_RECONNECT     0x704
 181 #define OBD_FAIL_TGT_DELAY_PRECREATE     0x705
 182
 183 #define OBD_FAIL_MDC_REVALIDATE_PAUSE    0x800
 184
 185 #define OBD_FAIL_MGS                     0x900
 186 #define OBD_FAIL_MGS_ALL_REQUEST_NET     0x901
 187 #define OBD_FAIL_MGS_ALL_REPLY_NET       0x902
 188 #define OBD_FAIL_MGC_PROCESS_LOG         0x903
 189 #define OBD_FAIL_MGS_SLOW_REQUEST_NET    0x904
 190
 191 #define OBD_FAIL_QUOTA_QD_COUNT_32BIT    0xA00
 192
 193 #define OBD_FAIL_LPROC_REMOVE            0xB00
 194
 195 /* preparation for a more advanced failure testbed (not functional yet) */
 196 #define OBD_FAIL_MASK_SYS    0x0000FF00
 197 #define OBD_FAIL_MASK_LOC    (0x000000FF | OBD_FAIL_MASK_SYS)
 198 #define OBD_FAIL_ONCE        0x80000000
 199 #define OBD_FAILED           0x40000000
 200
 201 #define OBD_FAIL_CHECK(id)   (((obd_fail_loc & OBD_FAIL_MASK_LOC) ==           \
 202                               ((id) & OBD_FAIL_MASK_LOC)) &&                   \
 203                               ((obd_fail_loc & (OBD_FAILED | OBD_FAIL_ONCE))!= \
 204                                 (OBD_FAILED | OBD_FAIL_ONCE)))
 205
 206 #define OBD_FAIL_CHECK_ONCE(id)                                              \
 207 ({      int _ret_ = 0;                                                       \
 208         if (OBD_FAIL_CHECK(id)) {                                            \
 209                 CERROR("*** obd_fail_loc=%x ***\n", id);                     \
 210                 obd_fail_loc |= OBD_FAILED;                                  \
 211                 if ((id) & OBD_FAIL_ONCE)                                    \
 212                         obd_fail_loc |= OBD_FAIL_ONCE;                       \
 213                 _ret_ = 1;                                                   \
 214         }                                                                    \
 215         _ret_;                                                               \
 216 })
 217
 218 #define OBD_FAIL_RETURN(id, ret)                                             \
 219 do {                                                                         \
 220         if (OBD_FAIL_CHECK_ONCE(id)) {                                       \
 221                 RETURN(ret);                                                 \
 222         }                                                                    \
 223 } while(0)
 224
 225 #define OBD_FAIL_TIMEOUT(id, secs)                                           \
 226 do {                                                                         \
 227         if (OBD_FAIL_CHECK_ONCE(id)) {                                       \
 228                 CERROR("obd_fail_timeout id %x sleeping for %d secs\n",      \
 229                        (id), (secs));                                        \
 230                 set_current_state(TASK_UNINTERRUPTIBLE);                     \
 231                 cfs_schedule_timeout(CFS_TASK_UNINT,                         \
 232                                     cfs_time_seconds(secs));                 \
 233                 set_current_state(TASK_RUNNING);                             \
 234                 CERROR("obd_fail_timeout id %x awake\n", (id));              \
 235        }                                                                     \
 236 } while(0)
 237
 238 #ifdef __KERNEL__
 239 /* The idea here is to synchronise two threads to force a race. The
 240  * first thread that calls this with a matching fail_loc is put to
 241  * sleep. The next thread that calls with the same fail_loc wakes up
 242  * the first and continues. */
 243 #define OBD_RACE(id)                                                         \
 244 do {                                                                         \
 245         if  (OBD_FAIL_CHECK_ONCE(id)) {                                      \
 246                 obd_race_state = 0;                                          \
 247                 CERROR("obd_race id %x sleeping\n", (id));                   \
 248                 OBD_SLEEP_ON(obd_race_waitq, obd_race_state != 0);           \
 249                 CERROR("obd_fail_race id %x awake\n", (id));                 \
 250         } else if ((obd_fail_loc & OBD_FAIL_MASK_LOC) ==                     \
 251                     ((id) & OBD_FAIL_MASK_LOC)) {                            \
 252                 CERROR("obd_fail_race id %x waking\n", (id));                \
 253                 obd_race_state = 1;                                          \
 254                 wake_up(&obd_race_waitq);                                    \
 255         }                                                                    \
 256 } while(0)
 257 #else
 258 /* sigh.  an expedient fix until OBD_RACE is fixed up */
 259 #define OBD_RACE(foo) do {} while(0)
 260 #endif
 261
 262 #define fixme() CDEBUG(D_OTHER, "FIXME\n");
 263
 264 extern atomic_t libcfs_kmemory;
 265
 266 #if defined(LUSTRE_UTILS) /* this version is for utils only */
 267 #define OBD_ALLOC_GFP(ptr, size, gfp_mask)                                    \
 268 do {                                                                          \
 269         (ptr) = cfs_alloc(size, (gfp_mask));                                  \
 270         if ((ptr) == NULL) {                                                  \
 271                 CERROR("kmalloc of '" #ptr "' (%d bytes) failed at %s:%d\n",  \
 272                        (int)(size), __FILE__, __LINE__);                      \
 273         } else {                                                              \
 274                 memset(ptr, 0, size);                                         \
 275                 CDEBUG(D_MALLOC, "kmalloced '" #ptr "': %d at %p\n",          \
 276                        (int)(size), ptr);                                     \
 277         }                                                                     \
 278 } while (0)
 279 #else /* this version is for the kernel and liblustre */
 280 #define OBD_ALLOC_GFP(ptr, size, gfp_mask)                                    \
 281 do {                                                                          \
 282         (ptr) = cfs_alloc(size, (gfp_mask));                                  \
 283         if ((ptr) == NULL) {                                                  \
 284                 CERROR("kmalloc of '" #ptr "' (%d bytes) failed at %s:%d\n",  \
 285                        (int)(size), __FILE__, __LINE__);                      \
 286                 CERROR("%d total bytes allocated by Lustre, %d by Portals\n", \
 287                        atomic_read(&obd_memory), atomic_read(&libcfs_kmemory));\
 288         } else {                                                              \
 289                 memset(ptr, 0, size);                                         \
 290                 atomic_add(size, &obd_memory);                                \
 291                 if (atomic_read(&obd_memory) > obd_memmax)                    \
 292                         obd_memmax = atomic_read(&obd_memory);                \
 293                 CDEBUG(D_MALLOC, "kmalloced '" #ptr "': %d at %p (tot %d)\n", \
 294                        (int)(size), ptr, atomic_read(&obd_memory));           \
 295         }                                                                     \
 296 } while (0)
 297 #endif
 298
 299 #ifndef OBD_ALLOC_MASK
 300 # define OBD_ALLOC_MASK CFS_ALLOC_IO
 301 #endif
 302
 303 #define OBD_ALLOC(ptr, size) OBD_ALLOC_GFP(ptr, size, OBD_ALLOC_MASK)
 304 #define OBD_ALLOC_WAIT(ptr, size) OBD_ALLOC_GFP(ptr, size, CFS_ALLOC_STD)
 305 #define OBD_ALLOC_PTR(ptr) OBD_ALLOC(ptr, sizeof *(ptr))
 306 #define OBD_ALLOC_PTR_WAIT(ptr) OBD_ALLOC_WAIT(ptr, sizeof *(ptr))
 307
 308 #ifdef __arch_um__
 309 # define OBD_VMALLOC(ptr, size) OBD_ALLOC(ptr, size)
 310 #else
 311 # define OBD_VMALLOC(ptr, size)                                               \
 312 do {                                                                          \
 313         (ptr) = cfs_alloc_large(size);                                        \
 314         if ((ptr) == NULL) {                                                  \
 315                 CERROR("vmalloc of '" #ptr "' (%d bytes) failed at %s:%d\n",  \
 316                        (int)(size), __FILE__, __LINE__);                      \
 317                 CERROR("%d total bytes allocated by Lustre, %d by Portals\n", \
 318                        atomic_read(&obd_memory), atomic_read(&libcfs_kmemory));\
 319         } else {                                                              \
 320                 memset(ptr, 0, size);                                         \
 321                 atomic_add(size, &obd_memory);                                \
 322                 if (atomic_read(&obd_memory) > obd_memmax)                    \
 323                         obd_memmax = atomic_read(&obd_memory);                \
 324                 CDEBUG(D_MALLOC, "vmalloced '" #ptr "': %d at %p (tot %d)\n", \
 325                        (int)(size), ptr, atomic_read(&obd_memory));           \
 326         }                                                                     \
 327 } while (0)
 328 #endif
 329
 330 #ifdef CONFIG_DEBUG_SLAB
 331 #define POISON(ptr, c, s) do {} while (0)
 332 #else
 333 #define POISON(ptr, c, s) memset(ptr, c, s)
 334 #endif
 335
 336 #ifdef POISON_BULK
 337 #define POISON_PAGE(page, val) do { memset(kmap(page), val, CFS_PAGE_SIZE);   \
 338                                     kunmap(page); } while (0)
 339 #else
 340 #define POISON_PAGE(page, val) do { } while (0)
 341 #endif
 342
 343 #ifdef __KERNEL__
 344 #define OBD_FREE(ptr, size)                                                   \
 345 do {                                                                          \
 346         LASSERT(ptr);                                                         \
 347         atomic_sub(size, &obd_memory);                                        \
 348         CDEBUG(D_MALLOC, "kfreed '" #ptr "': %d at %p (tot %d).\n",           \
 349                (int)(size), ptr, atomic_read(&obd_memory));                   \
 350         POISON(ptr, 0x5a, size);                                              \
 351         cfs_free(ptr);                                                        \
 352         (ptr) = (void *)0xdeadbeef;                                           \
 353 } while (0)
 354 #else
 355 #define OBD_FREE(ptr, size) ((void)(size), free((ptr)))
 356 #endif
 357
 358 #ifdef __arch_um__
 359 # define OBD_VFREE(ptr, size) OBD_FREE(ptr, size)
 360 #else
 361 # define OBD_VFREE(ptr, size)                                                 \
 362 do {                                                                          \
 363         LASSERT(ptr);                                                         \
 364         atomic_sub(size, &obd_memory);                                        \
 365         CDEBUG(D_MALLOC, "vfreed '" #ptr "': %d at %p (tot %d).\n",           \
 366                (int)(size), ptr, atomic_read(&obd_memory));                   \
 367         POISON(ptr, 0x5a, size);                                              \
 368         cfs_free_large(ptr);                                                  \
 369         (ptr) = (void *)0xdeadbeef;                                           \
 370 } while (0)
 371 #endif
 372
 373 /* we memset() the slab object to 0 when allocation succeeds, so DO NOT
 374  * HAVE A CTOR THAT DOES ANYTHING.  its work will be cleared here.  we'd
 375  * love to assert on that, but slab.c keeps kmem_cache_s all to itself. */
 376 #define OBD_SLAB_ALLOC(ptr, slab, type, size)                                 \
 377 do {                                                                          \
 378         LASSERT(!in_interrupt());                                             \
 379         (ptr) = cfs_mem_cache_alloc(slab, (type));                            \
 380         if ((ptr) == NULL) {                                                  \
 381                 CERROR("slab-alloc of '"#ptr"' (%d bytes) failed at %s:%d\n", \
 382                        (int)(size), __FILE__, __LINE__);                      \
 383                 CERROR("%d total bytes allocated by Lustre, %d by Portals\n", \
 384                        atomic_read(&obd_memory), atomic_read(&libcfs_kmemory));\
 385         } else {                                                              \
 386                 memset(ptr, 0, size);                                         \
 387                 atomic_add(size, &obd_memory);                                \
 388                 if (atomic_read(&obd_memory) > obd_memmax)                    \
 389                         obd_memmax = atomic_read(&obd_memory);                \
 390                 CDEBUG(D_MALLOC, "slab-alloced '"#ptr"': %d at %p (tot %d)\n",\
 391                        (int)(size), ptr, atomic_read(&obd_memory));           \
 392         }                                                                     \
 393 } while (0)
 394
 395 #define OBD_FREE_PTR(ptr) OBD_FREE(ptr, sizeof *(ptr))
 396
 397 #define OBD_SLAB_FREE(ptr, slab, size)                                        \
 398 do {                                                                          \
 399         LASSERT(ptr);                                                         \
 400         CDEBUG(D_MALLOC, "slab-freed '" #ptr "': %d at %p (tot %d).\n",       \
 401                (int)(size), ptr, atomic_read(&obd_memory));                   \
 402         atomic_sub(size, &obd_memory);                                        \
 403         POISON(ptr, 0x5a, size);                                              \
 404         cfs_mem_cache_free(slab, ptr);                                        \
 405         (ptr) = (void *)0xdeadbeef;                                           \
 406 } while (0)
 407
 408 #define KEY_IS(str) (keylen >= strlen(key) && strcmp(key, str) == 0)
 409
 410 #if defined(__linux__)
 411 #include <linux/obd_support.h>
 412 #elif defined(__APPLE__)
 413 #include <darwin/obd_support.h>
 414 #elif defined(__WINNT__)
 415 #include <winnt/obd_support.h>
 416 #else
 417 #error Unsupported operating system.
 418 #endif
 419
 420 #endif