libcfs/include/libcfs/linux/libcfs.h

   1 /*
   2  * GPL HEADER START
   3  *
   4  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
   5  *
   6  * This program is free software; you can redistribute it and/or modify
   7  * it under the terms of the GNU General Public License version 2 only,
   8  * as published by the Free Software Foundation.
   9  *
  10  * This program is distributed in the hope that it will be useful, but
  11  * WITHOUT ANY WARRANTY; without even the implied warranty of
  12  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  13  * General Public License version 2 for more details (a copy is included
  14  * in the LICENSE file that accompanied this code).
  15  *
  16  * You should have received a copy of the GNU General Public License
  17  * version 2 along with this program; If not, see
  18  * http://www.sun.com/software/products/lustre/docs/GPLv2.pdf
  19  *
  20  * Please contact Sun Microsystems, Inc., 4150 Network Circle, Santa Clara,
  21  * CA 95054 USA or visit www.sun.com if you need additional information or
  22  * have any questions.
  23  *
  24  * GPL HEADER END
  25  */
  26 /*
  27  * Copyright (c) 2008, 2010, Oracle and/or its affiliates. All rights reserved.
  28  * Use is subject to license terms.
  29  */
  30 /*
  31  * This file is part of Lustre, http://www.lustre.org/
  32  * Lustre is a trademark of Sun Microsystems, Inc.
  33  */
  34
  35 #ifndef __LIBCFS_LINUX_LIBCFS_H__
  36 #define __LIBCFS_LINUX_LIBCFS_H__
  37
  38 #ifndef __LIBCFS_LIBCFS_H__
  39 #error Do not #include this file directly. #include <libcfs/libcfs.h> instead
  40 #endif
  41
  42 #ifndef __KERNEL__
  43 #error This include is only for kernel use.
  44 #endif
  45
  46
  47 #include <stdarg.h>
  48 #include <libcfs/linux/linux-cpu.h>
  49 #include <libcfs/linux/linux-time.h>
  50 #include <libcfs/linux/linux-mem.h>
  51 #include <libcfs/linux/linux-prim.h>
  52 #include <libcfs/linux/linux-lock.h>
  53 #include <libcfs/linux/linux-fs.h>
  54 #include <libcfs/linux/linux-tcpip.h>
  55 #include <libcfs/linux/linux-bitops.h>
  56 #include <libcfs/linux/linux-types.h>
  57 #include <libcfs/linux/kp30.h>
  58
  59 #ifdef HAVE_ASM_TYPES_H
  60 #include <asm/types.h>
  61 #endif
  62 #include <linux/types.h>
  63 #include <asm/timex.h>
  64 #include <linux/sched.h> /* THREAD_SIZE */
  65
  66 #define CFS_THREAD_SIZE   THREAD_SIZE
  67 #define LUSTRE_TRACE_SIZE (THREAD_SIZE >> 5)
  68
  69 #if !defined(__x86_64__)
  70 # ifdef  __ia64__
  71 #  define CDEBUG_STACK() (THREAD_SIZE -                                 \
  72                           ((unsigned long)__builtin_dwarf_cfa() &       \
  73                            (THREAD_SIZE - 1)))
  74 # else
  75 #  define CDEBUG_STACK() (THREAD_SIZE -                                 \
  76                           ((unsigned long)__builtin_frame_address(0) &  \
  77                            (THREAD_SIZE - 1)))
  78 # endif /* __ia64__ */
  79
  80 #define __CHECK_STACK(msgdata, mask, cdls)                              \
  81 do {                                                                    \
  82         if (unlikely(CDEBUG_STACK() > libcfs_stack)) {                  \
  83                 LIBCFS_DEBUG_MSG_DATA_INIT(msgdata, D_WARNING, NULL);   \
  84                 libcfs_stack = CDEBUG_STACK();                          \
  85                 libcfs_debug_msg(msgdata,                               \
  86                                  "maximum lustre stack %lu\n",          \
  87                                  CDEBUG_STACK());                       \
  88                 (msgdata)->msg_mask = mask;                             \
  89                 (msgdata)->msg_cdls = cdls;                             \
  90                 dump_stack();                                           \
  91               /*panic("LBUG");*/                                        \
  92         }                                                               \
  93 } while (0)
  94 #define CFS_CHECK_STACK(msgdata, mask, cdls)  __CHECK_STACK(msgdata, mask, cdls)
  95 #else /* __x86_64__ */
  96 #define CFS_CHECK_STACK(msgdata, mask, cdls) do {} while(0)
  97 #define CDEBUG_STACK() (0L)
  98 #endif /* __x86_64__ */
  99
 100 /* initial pid  */
 101 #define LUSTRE_LNET_PID          12345
 102
 103 #define ENTRY_NESTING_SUPPORT (1)
 104 #define ENTRY_NESTING   do {;} while (0)
 105 #define EXIT_NESTING   do {;} while (0)
 106 #define __current_nesting_level() (0)
 107
 108 /**
 109  * Platform specific declarations for cfs_curproc API (libcfs/curproc.h)
 110  *
 111  * Implementation is in linux-curproc.c
 112  */
 113 #define CFS_CURPROC_COMM_MAX (sizeof ((struct task_struct *)0)->comm)
 114
 115 #include <linux/capability.h>
 116 typedef kernel_cap_t cfs_kernel_cap_t;
 117
 118 /*
 119  * No stack-back-tracing in Linux for now.
 120  */
 121 struct cfs_stack_trace {
 122 };
 123
 124 /* long integer with size equal to pointer */
 125 typedef unsigned long ulong_ptr_t;
 126 typedef long long_ptr_t;
 127
 128 #ifndef WITH_WATCHDOG
 129 #define WITH_WATCHDOG
 130 #endif
 131
 132 #ifndef HAVE_STRUCT_CRED
 133
 134 #define current_cred() (current)
 135
 136 #define current_cred_xxx(xxx)                   \
 137 ({                                              \
 138         current->xxx;                     \
 139 })
 140
 141 #ifndef HAVE_CRED_WRAPPERS
 142
 143 #define current_uid()           (current_cred_xxx(uid))
 144 #define current_gid()           (current_cred_xxx(gid))
 145 #define current_euid()          (current_cred_xxx(euid))
 146 #define current_egid()          (current_cred_xxx(egid))
 147 #define current_suid()          (current_cred_xxx(suid))
 148 #define current_sgid()          (current_cred_xxx(sgid))
 149 #define current_fsuid()         (current_cred_xxx(fsuid))
 150 #define current_fsgid()         (current_cred_xxx(fsgid))
 151 #define current_cap()           (current_cred_xxx(cap_effective))
 152
 153 #endif /* HAVE_LINUX_CRED_H */
 154
 155 #define current_user()          (current_cred_xxx(user))
 156 #define current_user_ns()       (current_cred_xxx(user)->user_ns)
 157 #define current_security()      (current_cred_xxx(security))
 158
 159 #define cred task_struct
 160
 161 #define prepare_creds() (current)
 162 #define commit_creds(a)
 163
 164 #endif /* HAVE_STRUCT_CRED */
 165
 166 #endif /* _LINUX_LIBCFS_H */