include/linux/utrace_struct.h

   1 /*
   2  * 'struct utrace' data structure for kernel/utrace.c private use.
   3  *
   4  * Copyright (C) 2006-2009 Red Hat, Inc.  All rights reserved.
   5  *
   6  * This copyrighted material is made available to anyone wishing to use,
   7  * modify, copy, or redistribute it subject to the terms and conditions
   8  * of the GNU General Public License v.2.
   9  */
  10
  11 #ifndef _LINUX_UTRACE_STRUCT_H
  12 #define _LINUX_UTRACE_STRUCT_H  1
  13
  14 #ifdef CONFIG_UTRACE
  15
  16 #include <linux/list.h>
  17 #include <linux/spinlock.h>
  18
  19 /*
  20  * Per-thread structure private to utrace implementation.  This properly
  21  * belongs in kernel/utrace.c and its use is entirely private to the code
  22  * there.  It is only defined in a header file so that it can be embedded
  23  * in the struct task_struct layout.  It is here rather than in utrace.h
  24  * to avoid header nesting order issues getting too complex.
  25  *
  26  */
  27 struct utrace {
  28         struct task_struct *cloning;
  29
  30         struct list_head attached, attaching;
  31         spinlock_t lock;
  32
  33         struct utrace_engine *reporting;
  34
  35         unsigned int stopped:1;
  36         unsigned int report:1;
  37         unsigned int interrupt:1;
  38         unsigned int signal_handler:1;
  39         unsigned int vfork_stop:1; /* need utrace_stop() before vfork wait */
  40         unsigned int death:1;   /* in utrace_report_death() now */
  41         unsigned int reap:1;    /* release_task() has run */
  42 };
  43
  44 # define INIT_UTRACE(tsk)                                                     \
  45         .utrace_flags = 0,                                                    \
  46         .utrace = {                                                           \
  47                 .lock = __SPIN_LOCK_UNLOCKED(tsk.utrace.lock),                \
  48                 .attached = LIST_HEAD_INIT(tsk.utrace.attached),              \
  49                 .attaching = LIST_HEAD_INIT(tsk.utrace.attaching),            \
  50         },
  51
  52 #else
  53
  54 # define INIT_UTRACE(tsk)       /* Nothing. */
  55
  56 #endif  /* CONFIG_UTRACE */
  57
  58 #endif  /* linux/utrace_struct.h */