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