libcfs/include/libcfs/linux/libcfs.h

   1 /* -*- mode: c; c-basic-offset: 8; indent-tabs-mode: nil; -*-
   2  * vim:expandtab:shiftwidth=8:tabstop=8:
   3  *
   4  * GPL HEADER START
   5  *
   6  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
   7  *
   8  * This program is free software; you can redistribute it and/or modify
   9  * it under the terms of the GNU General Public License version 2 only,
  10  * as published by the Free Software Foundation.
  11  *
  12  * This program is distributed in the hope that it will be useful, but
  13  * WITHOUT ANY WARRANTY; without even the implied warranty of
  14  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  15  * General Public License version 2 for more details (a copy is included
  16  * in the LICENSE file that accompanied this code).
  17  *
  18  * You should have received a copy of the GNU General Public License
  19  * version 2 along with this program; If not, see
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  28 /*
  29  * Copyright (c) 2008, 2010, Oracle and/or its affiliates. All rights reserved.
  30  * Use is subject to license terms.
  31  */
  32 /*
  33  * This file is part of Lustre, http://www.lustre.org/
  34  * Lustre is a trademark of Sun Microsystems, Inc.
  35  */
  36
  37 #ifndef __LIBCFS_LINUX_LIBCFS_H__
  38 #define __LIBCFS_LINUX_LIBCFS_H__
  39
  40 #ifndef __LIBCFS_LIBCFS_H__
  41 #error Do not #include this file directly. #include <libcfs/libcfs.h> instead
  42 #endif
  43
  44 #ifndef __KERNEL__
  45 #error This include is only for kernel use.
  46 #endif
  47
  48
  49 #include <stdarg.h>
  50 #include <libcfs/linux/linux-time.h>
  51 #include <libcfs/linux/linux-mem.h>
  52 #include <libcfs/linux/linux-prim.h>
  53 #include <libcfs/linux/linux-lock.h>
  54 #include <libcfs/linux/linux-fs.h>
  55 #include <libcfs/linux/linux-tcpip.h>
  56 #include <libcfs/linux/linux-bitops.h>
  57 #include <libcfs/linux/linux-types.h>
  58 #include <libcfs/linux/kp30.h>
  59
  60 #ifdef HAVE_ASM_TYPES_H
  61 #include <asm/types.h>
  62 #endif
  63 #include <linux/types.h>
  64 #include <asm/timex.h>
  65 #include <linux/sched.h> /* THREAD_SIZE */
  66
  67 #define CFS_THREAD_SIZE   THREAD_SIZE
  68 #define LUSTRE_TRACE_SIZE (THREAD_SIZE >> 5)
  69
  70 #if !defined(__x86_64__)
  71 # ifdef  __ia64__
  72 #  define CDEBUG_STACK() (THREAD_SIZE -                                 \
  73                           ((unsigned long)__builtin_dwarf_cfa() &       \
  74                            (THREAD_SIZE - 1)))
  75 # else
  76 #  define CDEBUG_STACK() (THREAD_SIZE -                                 \
  77                           ((unsigned long)__builtin_frame_address(0) &  \
  78                            (THREAD_SIZE - 1)))
  79 # endif /* __ia64__ */
  80
  81 #define __CHECK_STACK(msgdata, mask, cdls)                              \
  82 do {                                                                    \
  83         if (unlikely(CDEBUG_STACK() > libcfs_stack)) {                  \
  84                 libcfs_stack = CDEBUG_STACK();                          \
  85                 (msgdata)->msg_mask = D_WARNING;                        \
  86                 (msgdata)->msg_cdls = NULL;                             \
  87                 libcfs_debug_msg(msgdata,                               \
  88                                  "maximum lustre stack %lu\n",          \
  89                                  CDEBUG_STACK());                       \
  90                 (msgdata)->msg_mask = mask;                             \
  91                 (msgdata)->msg_cdls = cdls;                             \
  92                 dump_stack();                                           \
  93               /*panic("LBUG");*/                                        \
  94         }                                                               \
  95 } while (0)
  96 #define CFS_CHECK_STACK(msgdata, mask, cdls)  __CHECK_STACK(msgdata, mask, cdls)
  97 #else /* __x86_64__ */
  98 #define CFS_CHECK_STACK(msgdata, mask, cdls) do {} while(0)
  99 #define CDEBUG_STACK() (0L)
 100 #endif /* __x86_64__ */
 101
 102 /* initial pid  */
 103 #define LUSTRE_LNET_PID          12345
 104
 105 #define ENTRY_NESTING_SUPPORT (1)
 106 #define ENTRY_NESTING   do {;} while (0)
 107 #define EXIT_NESTING   do {;} while (0)
 108 #define __current_nesting_level() (0)
 109
 110 /**
 111  * Platform specific declarations for cfs_curproc API (libcfs/curproc.h)
 112  *
 113  * Implementation is in linux-curproc.c
 114  */
 115 #define CFS_CURPROC_COMM_MAX (sizeof ((struct task_struct *)0)->comm)
 116
 117 #include <linux/capability.h>
 118 typedef kernel_cap_t cfs_kernel_cap_t;
 119
 120 /*
 121  * No stack-back-tracing in Linux for now.
 122  */
 123 struct cfs_stack_trace {
 124 };
 125
 126 /* long integer with size equal to pointer */
 127 typedef unsigned long ulong_ptr_t;
 128 typedef long long_ptr_t;
 129
 130 #ifndef WITH_WATCHDOG
 131 #define WITH_WATCHDOG
 132 #endif
 133
 134 #ifndef HAVE_STRUCT_CRED
 135
 136 #define current_cred() (current)
 137
 138 #define current_cred_xxx(xxx)                   \
 139 ({                                              \
 140         current->xxx;                     \
 141 })
 142
 143 #ifndef HAVE_CRED_WRAPPERS
 144
 145 #define current_uid()           (current_cred_xxx(uid))
 146 #define current_gid()           (current_cred_xxx(gid))
 147 #define current_euid()          (current_cred_xxx(euid))
 148 #define current_egid()          (current_cred_xxx(egid))
 149 #define current_suid()          (current_cred_xxx(suid))
 150 #define current_sgid()          (current_cred_xxx(sgid))
 151 #define current_fsuid()         (current_cred_xxx(fsuid))
 152 #define current_fsgid()         (current_cred_xxx(fsgid))
 153 #define current_cap()           (current_cred_xxx(cap_effective))
 154
 155 #endif /* HAVE_LINUX_CRED_H */
 156
 157 #define current_user()          (current_cred_xxx(user))
 158 #define current_user_ns()       (current_cred_xxx(user)->user_ns)
 159 #define current_security()      (current_cred_xxx(security))
 160
 161 #define cred task_struct
 162
 163 #define prepare_creds() (current)
 164 #define commit_creds(a)
 165
 166 #endif /* HAVE_STRUCT_CRED */
 167
 168 #endif /* _LINUX_LIBCFS_H */