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 #ifdef __KERNEL__
  27 #include <linux/config.h>
  28 #include <linux/autoconf.h>
  29 #include <linux/slab.h>
  30 #include <linux/highmem.h>
  31 #endif
  32 #include <linux/kp30.h>
  33 #include <linux/lustre_compat25.h>
  34
  35 /* global variables */
  36 extern atomic_t obd_memory;
  37 extern int obd_memmax;
  38 extern unsigned int obd_fail_loc;
  39 extern unsigned int obd_timeout;
  40 extern char obd_lustre_upcall[128];
  41 extern unsigned int obd_sync_filter;
  42 extern wait_queue_head_t obd_race_waitq;
  43
  44 #define OBD_FAIL_MDS                     0x100
  45 #define OBD_FAIL_MDS_HANDLE_UNPACK       0x101
  46 #define OBD_FAIL_MDS_GETATTR_NET         0x102
  47 #define OBD_FAIL_MDS_GETATTR_PACK        0x103
  48 #define OBD_FAIL_MDS_READPAGE_NET        0x104
  49 #define OBD_FAIL_MDS_READPAGE_PACK       0x105
  50 #define OBD_FAIL_MDS_SENDPAGE            0x106
  51 #define OBD_FAIL_MDS_REINT_NET           0x107
  52 #define OBD_FAIL_MDS_REINT_UNPACK        0x108
  53 #define OBD_FAIL_MDS_REINT_SETATTR       0x109
  54 #define OBD_FAIL_MDS_REINT_SETATTR_WRITE 0x10a
  55 #define OBD_FAIL_MDS_REINT_CREATE        0x10b
  56 #define OBD_FAIL_MDS_REINT_CREATE_WRITE  0x10c
  57 #define OBD_FAIL_MDS_REINT_UNLINK        0x10d
  58 #define OBD_FAIL_MDS_REINT_UNLINK_WRITE  0x10e
  59 #define OBD_FAIL_MDS_REINT_LINK          0x10f
  60 #define OBD_FAIL_MDS_REINT_LINK_WRITE    0x110
  61 #define OBD_FAIL_MDS_REINT_RENAME        0x111
  62 #define OBD_FAIL_MDS_REINT_RENAME_WRITE  0x112
  63 #define OBD_FAIL_MDS_OPEN_NET            0x113
  64 #define OBD_FAIL_MDS_OPEN_PACK           0x114
  65 #define OBD_FAIL_MDS_CLOSE_NET           0x115
  66 #define OBD_FAIL_MDS_CLOSE_PACK          0x116
  67 #define OBD_FAIL_MDS_CONNECT_NET         0x117
  68 #define OBD_FAIL_MDS_CONNECT_PACK        0x118
  69 #define OBD_FAIL_MDS_REINT_NET_REP       0x119
  70 #define OBD_FAIL_MDS_DISCONNECT_NET      0x11a
  71 #define OBD_FAIL_MDS_GETSTATUS_NET       0x11b
  72 #define OBD_FAIL_MDS_GETSTATUS_PACK      0x11c
  73 #define OBD_FAIL_MDS_STATFS_PACK         0x11d
  74 #define OBD_FAIL_MDS_STATFS_NET          0x11e
  75 #define OBD_FAIL_MDS_GETATTR_NAME_NET    0x11f
  76 #define OBD_FAIL_MDS_PIN_NET             0x120
  77 #define OBD_FAIL_MDS_UNPIN_NET           0x121
  78 #define OBD_FAIL_MDS_ALL_REPLY_NET       0x122
  79 #define OBD_FAIL_MDS_ALL_REQUEST_NET     0x123
  80 #define OBD_FAIL_MDS_SYNC_NET            0x124
  81 #define OBD_FAIL_MDS_SYNC_PACK           0x125
  82 #define OBD_FAIL_MDS_DONE_WRITING_NET    0x126
  83 #define OBD_FAIL_MDS_DONE_WRITING_PACK   0x127
  84 #define OBD_FAIL_MDS_ALLOC_OBDO          0x128
  85
  86 #define OBD_FAIL_OST                     0x200
  87 #define OBD_FAIL_OST_CONNECT_NET         0x201
  88 #define OBD_FAIL_OST_DISCONNECT_NET      0x202
  89 #define OBD_FAIL_OST_GET_INFO_NET        0x203
  90 #define OBD_FAIL_OST_CREATE_NET          0x204
  91 #define OBD_FAIL_OST_DESTROY_NET         0x205
  92 #define OBD_FAIL_OST_GETATTR_NET         0x206
  93 #define OBD_FAIL_OST_SETATTR_NET         0x207
  94 #define OBD_FAIL_OST_OPEN_NET            0x208
  95 #define OBD_FAIL_OST_CLOSE_NET           0x209
  96 #define OBD_FAIL_OST_BRW_NET             0x20a
  97 #define OBD_FAIL_OST_PUNCH_NET           0x20b
  98 #define OBD_FAIL_OST_STATFS_NET          0x20c
  99 #define OBD_FAIL_OST_HANDLE_UNPACK       0x20d
 100 #define OBD_FAIL_OST_BRW_WRITE_BULK      0x20e
 101 #define OBD_FAIL_OST_BRW_READ_BULK       0x20f
 102 #define OBD_FAIL_OST_SYNC_NET            0x210
 103 #define OBD_FAIL_OST_ALL_REPLY_NET       0x211
 104 #define OBD_FAIL_OST_ALL_REQUESTS_NET    0x212
 105 #define OBD_FAIL_OST_LDLM_REPLY_NET      0x213
 106 #define OBD_FAIL_OST_BRW_PAUSE_BULK      0x214
 107
 108 #define OBD_FAIL_LDLM                    0x300
 109 #define OBD_FAIL_LDLM_NAMESPACE_NEW      0x301
 110 #define OBD_FAIL_LDLM_ENQUEUE            0x302
 111 #define OBD_FAIL_LDLM_CONVERT            0x303
 112 #define OBD_FAIL_LDLM_CANCEL             0x304
 113 #define OBD_FAIL_LDLM_BL_CALLBACK        0x305
 114 #define OBD_FAIL_LDLM_CP_CALLBACK        0x306
 115 #define OBD_FAIL_LDLM_GL_CALLBACK        0x307
 116
 117 #define OBD_FAIL_OSC                     0x400
 118 #define OBD_FAIL_OSC_BRW_READ_BULK       0x401
 119 #define OBD_FAIL_OSC_BRW_WRITE_BULK      0x402
 120 #define OBD_FAIL_OSC_LOCK_BL_AST         0x403
 121 #define OBD_FAIL_OSC_LOCK_CP_AST         0x404
 122 #define OBD_FAIL_OSC_MATCH               0x405
 123
 124 #define OBD_FAIL_PTLRPC                  0x500
 125 #define OBD_FAIL_PTLRPC_ACK              0x501
 126 #define OBD_FAIL_PTLRPC_RQBD             0x502
 127 #define OBD_FAIL_PTLRPC_BULK_GET_NET     0x503
 128 #define OBD_FAIL_PTLRPC_BULK_PUT_NET     0x504
 129
 130 #define OBD_FAIL_OBD_PING_NET            0x600
 131 #define OBD_FAIL_OBD_LOG_CANCEL_NET      0x601
 132 #define OBD_FAIL_OBD_LOGD_NET            0x602
 133
 134 #define OBD_FAIL_TGT_REPLY_NET           0x700
 135 #define OBD_FAIL_TGT_CONN_RACE           0x701
 136
 137 /* preparation for a more advanced failure testbed (not functional yet) */
 138 #define OBD_FAIL_MASK_SYS    0x0000FF00
 139 #define OBD_FAIL_MASK_LOC    (0x000000FF | OBD_FAIL_MASK_SYS)
 140 #define OBD_FAIL_ONCE        0x80000000
 141 #define OBD_FAILED           0x40000000
 142 #define OBD_FAIL_MDS_ALL_NET 0x01000000
 143 #define OBD_FAIL_OST_ALL_NET 0x02000000
 144
 145 #define OBD_FAIL_CHECK(id)   (((obd_fail_loc & OBD_FAIL_MASK_LOC) ==           \
 146                               ((id) & OBD_FAIL_MASK_LOC)) &&                   \
 147                               ((obd_fail_loc & (OBD_FAILED | OBD_FAIL_ONCE))!= \
 148                                 (OBD_FAILED | OBD_FAIL_ONCE)))
 149
 150 #define OBD_FAIL_CHECK_ONCE(id)                                              \
 151 ({      int _ret_ = 0;                                                       \
 152         if (OBD_FAIL_CHECK(id)) {                                            \
 153                 CERROR("obd_fail_loc=%x\n", id);                             \
 154                 obd_fail_loc |= OBD_FAILED;                                  \
 155                 if ((id) & OBD_FAIL_ONCE)                                    \
 156                         obd_fail_loc |= OBD_FAIL_ONCE;                       \
 157                 _ret_ = 1;                                                   \
 158         }                                                                    \
 159         _ret_;                                                               \
 160 })
 161
 162 #define OBD_FAIL_RETURN(id, ret)                                             \
 163 do {                                                                         \
 164         if (OBD_FAIL_CHECK_ONCE(id)) {                                       \
 165                 RETURN(ret);                                                 \
 166         }                                                                    \
 167 } while(0)
 168
 169 #define OBD_FAIL_TIMEOUT(id, secs)                                           \
 170 do {                                                                         \
 171         if  (OBD_FAIL_CHECK_ONCE(id)) {                                      \
 172                 CERROR("obd_fail_timeout id %x sleeping for %d secs\n",     \
 173                        (id), (secs));                                        \
 174                 set_current_state(TASK_UNINTERRUPTIBLE);                     \
 175                 schedule_timeout((secs) * HZ);                               \
 176                 set_current_state(TASK_RUNNING);                             \
 177                 CERROR("obd_fail_timeout id %x awake\n", (id));              \
 178        }                                                                     \
 179 } while(0)
 180
 181 /* The idea here is to synchronise two threads to force a race. The
 182  * first thread that calls this with a matching fail_loc is put to
 183  * sleep. The next thread that calls with the same fail_loc wakes up
 184  * the first and continues. */
 185 #define OBD_RACE(id)                                            \
 186 do {                                                            \
 187         if  (OBD_FAIL_CHECK_ONCE(id)) {                         \
 188                 CERROR("obd_race id %x sleeping\n", (id));      \
 189                 sleep_on(&obd_race_waitq);                      \
 190                 CERROR("obd_fail_race id %x awake\n", (id));    \
 191         } else if ((obd_fail_loc & OBD_FAIL_MASK_LOC) ==        \
 192                     ((id) & OBD_FAIL_MASK_LOC)) {               \
 193                 wake_up(&obd_race_waitq);                       \
 194         }                                                       \
 195 } while(0)
 196
 197 #define fixme() CDEBUG(D_OTHER, "FIXME\n");
 198
 199 #ifdef __KERNEL__
 200 # include <linux/types.h>
 201 # include <linux/blkdev.h>
 202
 203
 204 # if (LINUX_VERSION_CODE >= KERNEL_VERSION(2,5,0))
 205 #  define BDEVNAME_DECLARE_STORAGE(foo) char foo[BDEVNAME_SIZE]
 206 #  define ll_bdevname(SB, STORAGE) __bdevname(kdev_t_to_nr(SB->s_dev), STORAGE)
 207 #  define ll_lock_kernel lock_kernel()
 208 #  define ll_sbdev(SB)    ((SB)->s_bdev)
 209 void dev_set_rdonly(struct block_device *, int);
 210 # else
 211 #  define BDEVNAME_DECLARE_STORAGE(foo) char __unused_##foo
 212 #  define ll_sbdev(SB)    (kdev_t_to_nr((SB)->s_dev))
 213 #  define ll_bdevname(SB,STORAGE) ((void)__unused_##STORAGE,bdevname(ll_sbdev(SB)))
 214 #  define ll_lock_kernel
 215 void dev_set_rdonly(kdev_t, int);
 216 # endif
 217
 218 void dev_clear_rdonly(int);
 219
 220 static inline void OBD_FAIL_WRITE(int id, struct super_block *sb)
 221 {
 222         if (OBD_FAIL_CHECK(id)) {
 223                 BDEVNAME_DECLARE_STORAGE(tmp);
 224                 CERROR("obd_fail_loc=%x, fail write operation on %s\n",
 225                        id, ll_bdevname(sb, tmp));
 226                 dev_set_rdonly(ll_sbdev(sb), 2);
 227                 /* We set FAIL_ONCE because we never "un-fail" a device */
 228                 obd_fail_loc |= OBD_FAILED | OBD_FAIL_ONCE;
 229         }
 230 }
 231 #else /* !__KERNEL__ */
 232 # define LTIME_S(time) (time)
 233 /* for obd_class.h */
 234 # ifndef ERR_PTR
 235 #  define ERR_PTR(a) ((void *)(a))
 236 # endif
 237 #endif  /* __KERNEL__ */
 238
 239 extern atomic_t portal_kmemory;
 240
 241 #define OBD_ALLOC_GFP(ptr, size, gfp_mask)                                    \
 242 do {                                                                          \
 243         (ptr) = kmalloc(size, (gfp_mask));                                    \
 244         if ((ptr) == NULL) {                                                  \
 245                 CERROR("kmalloc of '" #ptr "' (%d bytes) failed at %s:%d\n",  \
 246                        (int)(size), __FILE__, __LINE__);                      \
 247                 CERROR("%d total bytes allocated by Lustre, %d by Portals\n", \
 248                        atomic_read(&obd_memory), atomic_read(&portal_kmemory));\
 249         } else {                                                              \
 250                 memset(ptr, 0, size);                                         \
 251                 atomic_add(size, &obd_memory);                                \
 252                 if (atomic_read(&obd_memory) > obd_memmax)                    \
 253                         obd_memmax = atomic_read(&obd_memory);                \
 254                 CDEBUG(D_MALLOC, "kmalloced '" #ptr "': %d at %p (tot %d)\n", \
 255                        (int)(size), ptr, atomic_read(&obd_memory));           \
 256         }                                                                     \
 257 } while (0)
 258
 259 #ifndef OBD_GFP_MASK
 260 # define OBD_GFP_MASK GFP_NOFS
 261 #endif
 262
 263 #define OBD_ALLOC(ptr, size) OBD_ALLOC_GFP(ptr, size, OBD_GFP_MASK)
 264 #define OBD_ALLOC_WAIT(ptr, size) OBD_ALLOC_GFP(ptr, size, GFP_KERNEL)
 265
 266 #ifdef __arch_um__
 267 # define OBD_VMALLOC(ptr, size) OBD_ALLOC(ptr, size)
 268 #else
 269 # define OBD_VMALLOC(ptr, size)                                               \
 270 do {                                                                          \
 271         (ptr) = vmalloc(size);                                                \
 272         if ((ptr) == NULL) {                                                  \
 273                 CERROR("vmalloc of '" #ptr "' (%d bytes) failed at %s:%d\n",  \
 274                        (int)(size), __FILE__, __LINE__);                      \
 275                 CERROR("%d total bytes allocated by Lustre, %d by Portals\n", \
 276                        atomic_read(&obd_memory), atomic_read(&portal_kmemory));\
 277         } else {                                                              \
 278                 memset(ptr, 0, size);                                         \
 279                 atomic_add(size, &obd_memory);                                \
 280                 if (atomic_read(&obd_memory) > obd_memmax)                    \
 281                         obd_memmax = atomic_read(&obd_memory);                \
 282                 CDEBUG(D_MALLOC, "vmalloced '" #ptr "': %d at %p (tot %d)\n", \
 283                        (int)(size), ptr, atomic_read(&obd_memory));           \
 284         }                                                                     \
 285 } while (0)
 286 #endif
 287
 288 #ifdef CONFIG_DEBUG_SLAB
 289 #define POISON(ptr, c, s) do {} while (0)
 290 #else
 291 #define POISON(ptr, c, s) memset(ptr, c, s)
 292 #endif
 293
 294 #if POISON_BULK
 295 #define POISON_PAGE(page, val) do { memset(kmap(page), val, PAGE_SIZE);       \
 296                                     kunmap(page); } while (0)
 297 #else
 298 #define POISON_PAGE(page, val) do { } while (0)
 299 #endif
 300
 301 #define OBD_FREE(ptr, size)                                                   \
 302 do {                                                                          \
 303         LASSERT(ptr);                                                         \
 304         atomic_sub(size, &obd_memory);                                        \
 305         CDEBUG(D_MALLOC, "kfreed '" #ptr "': %d at %p (tot %d).\n",           \
 306                (int)(size), ptr, atomic_read(&obd_memory));                   \
 307         POISON(ptr, 0x5a, size);                                              \
 308         kfree(ptr);                                                           \
 309         (ptr) = (void *)0xdeadbeef;                                           \
 310 } while (0)
 311
 312 #ifdef __arch_um__
 313 # define OBD_VFREE(ptr, size) OBD_FREE(ptr, size)
 314 #else
 315 # define OBD_VFREE(ptr, size)                                                 \
 316 do {                                                                          \
 317         LASSERT(ptr);                                                         \
 318         atomic_sub(size, &obd_memory);                                        \
 319         CDEBUG(D_MALLOC, "vfreed '" #ptr "': %d at %p (tot %d).\n",           \
 320                (int)(size), ptr, atomic_read(&obd_memory));                   \
 321         POISON(ptr, 0x5a, size);                                              \
 322         vfree(ptr);                                                           \
 323         (ptr) = (void *)0xdeadbeef;                                           \
 324 } while (0)
 325 #endif
 326
 327 /* we memset() the slab object to 0 when allocation succeeds, so DO NOT
 328  * HAVE A CTOR THAT DOES ANYTHING.  its work will be cleared here.  we'd
 329  * love to assert on that, but slab.c keeps kmem_cache_s all to itself. */
 330 #define OBD_SLAB_ALLOC(ptr, slab, type, size)                                 \
 331 do {                                                                          \
 332         LASSERT(!in_interrupt());                                             \
 333         (ptr) = kmem_cache_alloc(slab, (type));                               \
 334         if ((ptr) == NULL) {                                                  \
 335                 CERROR("slab-alloc of '"#ptr"' (%d bytes) failed at %s:%d\n", \
 336                        (int)(size), __FILE__, __LINE__);                      \
 337                 CERROR("%d total bytes allocated by Lustre, %d by Portals\n", \
 338                        atomic_read(&obd_memory), atomic_read(&portal_kmemory));\
 339         } else {                                                              \
 340                 memset(ptr, 0, size);                                         \
 341                 atomic_add(size, &obd_memory);                                \
 342                 if (atomic_read(&obd_memory) > obd_memmax)                    \
 343                         obd_memmax = atomic_read(&obd_memory);                \
 344                 CDEBUG(D_MALLOC, "slab-alloced '"#ptr"': %d at %p (tot %d)\n",\
 345                        (int)(size), ptr, atomic_read(&obd_memory));           \
 346         }                                                                     \
 347 } while (0)
 348
 349 #define OBD_SLAB_FREE(ptr, slab, size)                                        \
 350 do {                                                                          \
 351         LASSERT(ptr);                                                         \
 352         CDEBUG(D_MALLOC, "slab-freed '" #ptr "': %d at %p (tot %d).\n",       \
 353                (int)(size), ptr, atomic_read(&obd_memory));                   \
 354         atomic_sub(size, &obd_memory);                                        \
 355         POISON(ptr, 0x5a, size);                                              \
 356         kmem_cache_free(slab, ptr);                                           \
 357         (ptr) = (void *)0xdeadbeef;                                           \
 358 } while (0)
 359
 360 #endif