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/config.h>
  27 #include <linux/autoconf.h>
  28 #include <linux/slab.h>
  29 #include <linux/highmem.h>
  30 #include <linux/kp30.h>
  31
  32 /* global variables */
  33 extern atomic_t obd_memory;
  34 extern int obd_memmax;
  35 extern unsigned long obd_fail_loc;
  36 extern unsigned long obd_timeout;
  37 extern char obd_recovery_upcall[128];
  38 extern unsigned long obd_sync_filter;
  39
  40 #define OBD_FAIL_MDS                     0x100
  41 #define OBD_FAIL_MDS_HANDLE_UNPACK       0x101
  42 #define OBD_FAIL_MDS_GETATTR_NET         0x102
  43 #define OBD_FAIL_MDS_GETATTR_PACK        0x103
  44 #define OBD_FAIL_MDS_READPAGE_NET        0x104
  45 #define OBD_FAIL_MDS_READPAGE_PACK       0x105
  46 #define OBD_FAIL_MDS_SENDPAGE            0x106
  47 #define OBD_FAIL_MDS_REINT_NET           0x107
  48 #define OBD_FAIL_MDS_REINT_UNPACK        0x108
  49 #define OBD_FAIL_MDS_REINT_SETATTR       0x109
  50 #define OBD_FAIL_MDS_REINT_SETATTR_WRITE 0x10a
  51 #define OBD_FAIL_MDS_REINT_CREATE        0x10b
  52 #define OBD_FAIL_MDS_REINT_CREATE_WRITE  0x10c
  53 #define OBD_FAIL_MDS_REINT_UNLINK        0x10d
  54 #define OBD_FAIL_MDS_REINT_UNLINK_WRITE  0x10e
  55 #define OBD_FAIL_MDS_REINT_LINK          0x10f
  56 #define OBD_FAIL_MDS_REINT_LINK_WRITE    0x110
  57 #define OBD_FAIL_MDS_REINT_RENAME        0x111
  58 #define OBD_FAIL_MDS_REINT_RENAME_WRITE  0x112
  59 #define OBD_FAIL_MDS_OPEN_NET            0x113
  60 #define OBD_FAIL_MDS_OPEN_PACK           0x114
  61 #define OBD_FAIL_MDS_CLOSE_NET           0x115
  62 #define OBD_FAIL_MDS_CLOSE_PACK          0x116
  63 #define OBD_FAIL_MDS_CONNECT_NET         0x117
  64 #define OBD_FAIL_MDS_CONNECT_PACK        0x118
  65 #define OBD_FAIL_MDS_REINT_NET_REP       0x119
  66 #define OBD_FAIL_MDS_DISCONNECT_NET      0x11a
  67 #define OBD_FAIL_MDS_GETSTATUS_NET       0x11b
  68 #define OBD_FAIL_MDS_GETSTATUS_PACK      0x11c
  69 #define OBD_FAIL_MDS_STATFS_PACK         0x11d
  70 #define OBD_FAIL_MDS_STATFS_NET          0x11e
  71 #define OBD_FAIL_MDS_GETATTR_NAME_NET    0x11f
  72 #define OBD_FAIL_MDS_ALL_REPLY_NET       0x120
  73 #define OBD_FAIL_MDS_ALL_REQUEST_NET     0x121
  74
  75 #define OBD_FAIL_OST                     0x200
  76 #define OBD_FAIL_OST_CONNECT_NET         0x201
  77 #define OBD_FAIL_OST_DISCONNECT_NET      0x202
  78 #define OBD_FAIL_OST_GET_INFO_NET        0x203
  79 #define OBD_FAIL_OST_CREATE_NET          0x204
  80 #define OBD_FAIL_OST_DESTROY_NET         0x205
  81 #define OBD_FAIL_OST_GETATTR_NET         0x206
  82 #define OBD_FAIL_OST_SETATTR_NET         0x207
  83 #define OBD_FAIL_OST_OPEN_NET            0x208
  84 #define OBD_FAIL_OST_CLOSE_NET           0x209
  85 #define OBD_FAIL_OST_BRW_NET             0x20a
  86 #define OBD_FAIL_OST_PUNCH_NET           0x20b
  87 #define OBD_FAIL_OST_STATFS_NET          0x20c
  88 #define OBD_FAIL_OST_HANDLE_UNPACK       0x20d
  89 #define OBD_FAIL_OST_BRW_WRITE_BULK      0x20e
  90 #define OBD_FAIL_OST_BRW_READ_BULK       0x20f
  91
  92 #define OBD_FAIL_LDLM                    0x300
  93 #define OBD_FAIL_LDLM_NAMESPACE_NEW      0x301
  94 #define OBD_FAIL_LDLM_ENQUEUE            0x302
  95 #define OBD_FAIL_LDLM_CONVERT            0x303
  96 #define OBD_FAIL_LDLM_CANCEL             0x304
  97 #define OBD_FAIL_LDLM_BL_CALLBACK        0x305
  98 #define OBD_FAIL_LDLM_CP_CALLBACK        0x306
  99
 100 #define OBD_FAIL_OSC                     0x400
 101 #define OBD_FAIL_OSC_BRW_READ_BULK       0x401
 102 #define OBD_FAIL_OSC_BRW_WRITE_BULK      0x402
 103 #define OBD_FAIL_OSC_LOCK_BL_AST         0x403
 104 #define OBD_FAIL_OSC_LOCK_CP_AST         0x404
 105
 106 /* preparation for a more advanced failure testbed (not functional yet) */
 107 #define OBD_FAIL_MASK_SYS    0x0000FF00
 108 #define OBD_FAIL_MASK_LOC    (0x000000FF | OBD_FAIL_MASK_SYS)
 109 #define OBD_FAIL_ONCE        0x80000000
 110 #define OBD_FAILED           0x40000000
 111 #define OBD_FAIL_MDS_ALL_NET 0x01000000
 112 #define OBD_FAIL_OST_ALL_NET 0x02000000
 113
 114 #define OBD_FAIL_CHECK(id)   (((obd_fail_loc & OBD_FAIL_MASK_LOC) ==           \
 115                               ((id) & OBD_FAIL_MASK_LOC)) &&                   \
 116                               ((obd_fail_loc & (OBD_FAILED | OBD_FAIL_ONCE))!= \
 117                                 (OBD_FAILED | OBD_FAIL_ONCE)))
 118
 119 #define OBD_FAIL_RETURN(id, ret)                                             \
 120 do {                                                                         \
 121         if (OBD_FAIL_CHECK(id)) {                                            \
 122                 CERROR("obd_fail_loc=%x, fail operation rc=%d\n", id, ret);  \
 123                 obd_fail_loc |= OBD_FAILED;                                  \
 124                 if ((id) & OBD_FAIL_ONCE)                                    \
 125                         obd_fail_loc |= OBD_FAIL_ONCE;                       \
 126                 RETURN(ret);                                                 \
 127         }                                                                    \
 128 } while(0)
 129
 130 #include <linux/types.h>
 131 #include <linux/blkdev.h>
 132
 133 #define fixme() CDEBUG(D_OTHER, "FIXME\n");
 134
 135 #if (LINUX_VERSION_CODE >= KERNEL_VERSION(2,5,0))
 136 #define ll_bdevname(a) __bdevname((a))
 137 #define ll_lock_kernel lock_kernel()
 138 #else
 139 #define ll_lock_kernel
 140 #define ll_bdevname(a) bdevname((a))
 141 #endif
 142
 143 static inline void OBD_FAIL_WRITE(int id, kdev_t dev)
 144 {
 145         if (OBD_FAIL_CHECK(id)) {
 146 #ifdef CONFIG_DEV_RDONLY
 147                 CERROR("obd_fail_loc=%x, fail write operation on %s\n",
 148                        id, ll_bdevname(dev));
 149                 dev_set_rdonly(dev, 2);
 150 #else
 151                 CERROR("obd_fail_loc=%x, can't fail write operation on %s\n",
 152                        id, ll_bdevname(dev));
 153 #endif
 154                 /* We set FAIL_ONCE because we never "un-fail" a device */
 155                 obd_fail_loc |= OBD_FAILED | OBD_FAIL_ONCE;
 156         }
 157 }
 158
 159 #define OBD_ALLOC(ptr, size)                                            \
 160 do {                                                                    \
 161         void *lptr;                                                     \
 162         int s = (size);                                                 \
 163         (ptr) = lptr = kmalloc(s, GFP_KERNEL);                          \
 164         if (lptr == NULL) {                                             \
 165                 CERROR("kmalloc of '" #ptr "' (%d bytes) failed "       \
 166                        "at %s:%d\n", s, __FILE__, __LINE__);            \
 167         } else {                                                        \
 168                 int obd_curmem;                                         \
 169                 memset(lptr, 0, s);                                     \
 170                 atomic_add(s, &obd_memory);                             \
 171                 obd_curmem = atomic_read(&obd_memory);                  \
 172                 if (obd_curmem > obd_memmax)                            \
 173                         obd_memmax = obd_curmem;                        \
 174                 CDEBUG(D_MALLOC, "kmalloced '" #ptr "': %d at %p "      \
 175                        "(tot %d)\n", s, lptr, obd_curmem);              \
 176         }                                                               \
 177 } while (0)
 178
 179 #ifdef CONFIG_DEBUG_SLAB
 180 #define POISON(lptr, s) do {} while (0)
 181 #else
 182 #define POISON(lptr, s) memset(lptr, 0x5a, s)
 183 #endif
 184
 185 #define OBD_FREE(ptr, size)                                             \
 186 do {                                                                    \
 187         void *lptr = (ptr);                                             \
 188         int s = (size);                                                 \
 189         LASSERT(lptr);                                                  \
 190         POISON(lptr, s);                                                \
 191         kfree(lptr);                                                    \
 192         atomic_sub(s, &obd_memory);                                     \
 193         CDEBUG(D_MALLOC, "kfreed '" #ptr "': %d at %p (tot %d).\n",     \
 194                s, lptr, atomic_read(&obd_memory));                      \
 195         (ptr) = (void *)0xdeadbeef;                                     \
 196 } while (0)
 197
 198 #ifdef CONFIG_HIGHMEM
 199 extern void obd_kmap_get(int count, int server);
 200 extern void obd_kmap_put(int count);
 201 #else
 202 #define obd_kmap_get(count, server) do {} while (0)
 203 #define obd_kmap_put(count) do {} while (0)
 204 #endif
 205 #endif