bsd/sys/user.h

   1 /*
   2  * Copyright (c) 2000-2002 Apple Computer, Inc. All rights reserved.
   3  *
   4  * @APPLE_OSREFERENCE_LICENSE_HEADER_START@
   5  *
   6  * This file contains Original Code and/or Modifications of Original Code
   7  * as defined in and that are subject to the Apple Public Source License
   8  * Version 2.0 (the 'License'). You may not use this file except in
   9  * compliance with the License. The rights granted to you under the License
  10  * may not be used to create, or enable the creation or redistribution of,
  11  * unlawful or unlicensed copies of an Apple operating system, or to
  12  * circumvent, violate, or enable the circumvention or violation of, any
  13  * terms of an Apple operating system software license agreement.
  14  *
  15  * Please obtain a copy of the License at
  16  * http://www.opensource.apple.com/apsl/ and read it before using this file.
  17  *
  18  * The Original Code and all software distributed under the License are
  19  * distributed on an 'AS IS' basis, WITHOUT WARRANTY OF ANY KIND, EITHER
  20  * EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES,
  21  * INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY,
  22  * FITNESS FOR A PARTICULAR PURPOSE, QUIET ENJOYMENT OR NON-INFRINGEMENT.
  23  * Please see the License for the specific language governing rights and
  24  * limitations under the License.
  25  *
  26  * @APPLE_OSREFERENCE_LICENSE_HEADER_END@
  27  */
  28 /* Copyright (c) 1995, 1997 Apple Computer, Inc. All Rights Reserved */
  29 /*
  30  * Copyright (c) 1982, 1986, 1989, 1991, 1993
  31  *      The Regents of the University of California.  All rights reserved.
  32  *
  33  * Redistribution and use in source and binary forms, with or without
  34  * modification, are permitted provided that the following conditions
  35  * are met:
  36  * 1. Redistributions of source code must retain the above copyright
  37  *    notice, this list of conditions and the following disclaimer.
  38  * 2. Redistributions in binary form must reproduce the above copyright
  39  *    notice, this list of conditions and the following disclaimer in the
  40  *    documentation and/or other materials provided with the distribution.
  41  * 3. All advertising materials mentioning features or use of this software
  42  *    must display the following acknowledgement:
  43  *      This product includes software developed by the University of
  44  *      California, Berkeley and its contributors.
  45  * 4. Neither the name of the University nor the names of its contributors
  46  *    may be used to endorse or promote products derived from this software
  47  *    without specific prior written permission.
  48  *
  49  * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
  50  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  51  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
  52  * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
  53  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
  54  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
  55  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
  56  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
  57  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
  58  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
  59  * SUCH DAMAGE.
  60  *
  61  *      @(#)user.h      8.2 (Berkeley) 9/23/93
  62  */
  63
  64 #ifndef _SYS_USER_H_
  65 #define _SYS_USER_H_
  66
  67 #include <sys/appleapiopts.h>
  68 #ifndef KERNEL
  69 /* stuff that *used* to be included by user.h, or is now needed */
  70 #include <errno.h>
  71 #include <sys/time.h>
  72 #include <sys/resource.h>
  73 #include <sys/ucred.h>
  74 #include <sys/uio.h>
  75 #endif
  76 #include <sys/resourcevar.h>
  77 #ifdef KERNEL_PRIVATE
  78 #include <sys/signalvar.h>
  79 #endif
  80 #include <sys/vm.h>             /* XXX */
  81 #include <sys/sysctl.h>
  82
  83 #ifdef KERNEL
  84 #ifdef __APPLE_API_PRIVATE
  85 #include <sys/eventvar.h>
  86
  87 /*
  88  *      Per-thread U area.
  89  */
  90 struct uthread {
  91         /* syscall parameters, results and catches */
  92         u_int64_t uu_arg[8]; /* arguments to current system call */
  93         int     *uu_ap;                 /* pointer to arglist */
  94         int uu_rval[2];
  95
  96         /* thread exception handling */
  97         int     uu_exception;
  98         int     uu_code;                        /* ``code'' to trap */
  99         int     uu_subcode;
 100         char uu_cursig;                 /* p_cursig for exc. */
 101         /* support for select - across system calls */
 102         struct _select {
 103                 u_int32_t       *ibits, *obits; /* bits to select on */
 104                 uint    nbytes; /* number of bytes in ibits and obits */
 105                 wait_queue_set_t wqset;  /* cached across select calls */
 106                 size_t allocsize;                /* ...size of select cache */
 107                 u_int64_t abstime;
 108                 int poll;
 109                 int error;
 110                 int count;
 111                 char * wql;
 112         } uu_select;                    /* saved state for select() */
 113         /* to support continuations */
 114         union {
 115                 int uu_nfs_myiod;    /* saved state for nfsd */
 116                 struct _kevent_scan {
 117                         kevent_callback_t call; /* per-event callback */
 118                         kevent_continue_t cont; /* whole call continuation */
 119                         uint64_t deadline;      /* computed deadline for operation */
 120                         void *data;             /* caller's private data */
 121                 } ss_kevent_scan;               /* saved state for kevent_scan() */
 122                 struct _kevent {
 123                         struct _kevent_scan scan;/* space for the generic data */
 124                         struct fileproc *fp;     /* fileproc we hold iocount on */
 125                         int fd;                  /* filedescriptor for kq */
 126                         register_t *retval;      /* place to store return val */
 127                         user_addr_t eventlist;   /* user-level event list address */
 128                         int eventcount;         /* user-level event count */
 129                         int eventout;            /* number of events output */
 130                 } ss_kevent;                     /* saved state for kevent() */
 131         } uu_state;
 132   /* internal support for continuation framework */
 133     int (*uu_continuation)(int);
 134     int uu_pri;
 135     int uu_timo;
 136         int uu_flag;
 137         struct proc * uu_proc;
 138         void * uu_userstate;
 139         sigset_t uu_siglist;                            /* signals pending for the thread */
 140         sigset_t  uu_sigwait;                           /*  sigwait on this thread*/
 141         sigset_t  uu_sigmask;                           /* signal mask for the thread */
 142         sigset_t  uu_oldmask;                           /* signal mask saved before sigpause */
 143         thread_t uu_act;
 144         sigset_t  uu_vforkmask;                         /* saved signal mask during vfork */
 145
 146         TAILQ_ENTRY(uthread) uu_list;           /* List of uthreads in proc */
 147
 148         struct kaudit_record            *uu_ar;         /* audit record */
 149         struct task*    uu_aio_task;                    /* target task for async io */
 150
 151   /* network support for dlil layer locking */
 152         u_int32_t       dlil_incremented_read;
 153         lck_mtx_t       *uu_mtx;
 154
 155         int             uu_lowpri_delay;
 156
 157         struct ucred    *uu_ucred;              /* per thread credential */
 158         int             uu_defer_reclaims;
 159         vnode_t         uu_vreclaims;
 160                 struct user_sigaltstack uu_sigstk;
 161 #ifdef JOE_DEBUG
 162         int             uu_iocount;
 163         int             uu_vpindex;
 164         void    *       uu_vps[32];
 165 #endif
 166 };
 167
 168 typedef struct uthread * uthread_t;
 169
 170 /* Definition of uu_flag */
 171 #define UT_SAS_OLDMASK  0x00000001      /* need to restore mask before pause */
 172 #define UT_NO_SIGMASK   0x00000002      /* exited thread; invalid sigmask */
 173 #define UT_NOTCANCELPT  0x00000004             /* not a cancelation point */
 174 #define UT_CANCEL       0x00000008             /* thread marked for cancel */
 175 #define UT_CANCELED     0x00000010            /* thread cancelled */
 176 #define UT_CANCELDISABLE 0x00000020            /* thread cancel disabled */
 177 #define UT_ALTSTACK 0x00000040  /* this thread has alt stack for signals */
 178
 179 #define UT_VFORK        0x02000000      /* thread has vfork children */
 180 #define UT_SETUID       0x04000000      /* thread is settugid() */
 181 #define UT_WASSETUID    0x08000000      /* thread was settugid() (in vfork) */
 182
 183 #endif /* __APPLE_API_PRIVATE */
 184
 185 #endif  /* KERNEL */
 186
 187 /*
 188  * Per process structure containing data that isn't needed in core
 189  * when the process isn't running (esp. when swapped out).
 190  * This structure may or may not be at the same kernel address
 191  * in all processes.
 192  */
 193
 194 struct  user {
 195   /* NOT USED ANYMORE */
 196 };
 197
 198 #endif  /* !_SYS_USER_H_ */