bsd/sys/user.h

   1 /*
   2  * Copyright (c) 2000-2002 Apple Computer, Inc. All rights reserved.
   3  *
   4  * @APPLE_LICENSE_HEADER_START@
   5  *
   6  * The contents of this file constitute Original Code as defined in and
   7  * are subject to the Apple Public Source License Version 1.1 (the
   8  * "License").  You may not use this file except in compliance with the
   9  * License.  Please obtain a copy of the License at
  10  * http://www.apple.com/publicsource and read it before using this file.
  11  *
  12  * This Original Code and all software distributed under the License are
  13  * distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY KIND, EITHER
  14  * EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES,
  15  * INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY,
  16  * FITNESS FOR A PARTICULAR PURPOSE OR NON-INFRINGEMENT.  Please see the
  17  * License for the specific language governing rights and limitations
  18  * under the License.
  19  *
  20  * @APPLE_LICENSE_HEADER_END@
  21  */
  22 /* Copyright (c) 1995, 1997 Apple Computer, Inc. All Rights Reserved */
  23 /*
  24  * Copyright (c) 1982, 1986, 1989, 1991, 1993
  25  *      The Regents of the University of California.  All rights reserved.
  26  *
  27  * Redistribution and use in source and binary forms, with or without
  28  * modification, are permitted provided that the following conditions
  29  * are met:
  30  * 1. Redistributions of source code must retain the above copyright
  31  *    notice, this list of conditions and the following disclaimer.
  32  * 2. Redistributions in binary form must reproduce the above copyright
  33  *    notice, this list of conditions and the following disclaimer in the
  34  *    documentation and/or other materials provided with the distribution.
  35  * 3. All advertising materials mentioning features or use of this software
  36  *    must display the following acknowledgement:
  37  *      This product includes software developed by the University of
  38  *      California, Berkeley and its contributors.
  39  * 4. Neither the name of the University nor the names of its contributors
  40  *    may be used to endorse or promote products derived from this software
  41  *    without specific prior written permission.
  42  *
  43  * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
  44  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  45  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
  46  * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
  47  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
  48  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
  49  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
  50  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
  51  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
  52  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
  53  * SUCH DAMAGE.
  54  *
  55  *      @(#)user.h      8.2 (Berkeley) 9/23/93
  56  */
  57
  58 #ifndef _SYS_USER_H_
  59 #define _SYS_USER_H_
  60
  61 #include <sys/appleapiopts.h>
  62 #ifndef KERNEL
  63 /* stuff that *used* to be included by user.h, or is now needed */
  64 #include <errno.h>
  65 #include <sys/time.h>
  66 #include <sys/resource.h>
  67 #include <sys/ucred.h>
  68 #include <sys/uio.h>
  69 #endif
  70 #include <sys/resourcevar.h>
  71 #ifdef KERNEL_PRIVATE
  72 #include <sys/signalvar.h>
  73 #endif
  74 #include <sys/vm.h>             /* XXX */
  75 #include <sys/sysctl.h>
  76
  77 #ifdef KERNEL
  78 #ifdef __APPLE_API_PRIVATE
  79 #include <sys/eventvar.h>
  80
  81 /*
  82  *      Per-thread U area.
  83  */
  84 struct uthread {
  85         /* syscall parameters, results and catches */
  86         u_int64_t uu_arg[8]; /* arguments to current system call */
  87         int     *uu_ap;                 /* pointer to arglist */
  88         int uu_rval[2];
  89
  90         /* thread exception handling */
  91         int     uu_exception;
  92         int     uu_code;                        /* ``code'' to trap */
  93         int     uu_subcode;
  94         char uu_cursig;                 /* p_cursig for exc. */
  95         /* support for select - across system calls */
  96         struct _select {
  97                 u_int32_t       *ibits, *obits; /* bits to select on */
  98                 uint    nbytes; /* number of bytes in ibits and obits */
  99                 wait_queue_set_t wqset;  /* cached across select calls */
 100                 size_t allocsize;                /* ...size of select cache */
 101                 u_int64_t abstime;
 102                 int poll;
 103                 int error;
 104                 int count;
 105                 char * wql;
 106         } uu_select;                    /* saved state for select() */
 107         /* to support continuations */
 108         union {
 109                 int uu_nfs_myiod;    /* saved state for nfsd */
 110                 struct _kevent_scan {
 111                         kevent_callback_t call; /* per-event callback */
 112                         kevent_continue_t cont; /* whole call continuation */
 113                         uint64_t deadline;      /* computed deadline for operation */
 114                         void *data;             /* caller's private data */
 115                 } ss_kevent_scan;               /* saved state for kevent_scan() */
 116                 struct _kevent {
 117                         struct _kevent_scan scan;/* space for the generic data */
 118                         struct fileproc *fp;     /* fileproc we hold iocount on */
 119                         int fd;                  /* filedescriptor for kq */
 120                         register_t *retval;      /* place to store return val */
 121                         user_addr_t eventlist;   /* user-level event list address */
 122                         int eventcount;         /* user-level event count */
 123                         int eventout;            /* number of events output */
 124                 } ss_kevent;                     /* saved state for kevent() */
 125         } uu_state;
 126   /* internal support for continuation framework */
 127     int (*uu_continuation)(int);
 128     int uu_pri;
 129     int uu_timo;
 130         int uu_flag;
 131         struct proc * uu_proc;
 132         void * uu_userstate;
 133         sigset_t uu_siglist;                            /* signals pending for the thread */
 134         sigset_t  uu_sigwait;                           /*  sigwait on this thread*/
 135         sigset_t  uu_sigmask;                           /* signal mask for the thread */
 136         sigset_t  uu_oldmask;                           /* signal mask saved before sigpause */
 137         thread_t uu_act;
 138         sigset_t  uu_vforkmask;                         /* saved signal mask during vfork */
 139
 140         TAILQ_ENTRY(uthread) uu_list;           /* List of uthreads in proc */
 141
 142         struct kaudit_record            *uu_ar;         /* audit record */
 143         struct task*    uu_aio_task;                    /* target task for async io */
 144
 145   /* network support for dlil layer locking */
 146         u_int32_t       dlil_incremented_read;
 147         lck_mtx_t       *uu_mtx;
 148
 149         int             uu_lowpri_delay;
 150
 151         struct ucred    *uu_ucred;              /* per thread credential */
 152         int             uu_defer_reclaims;
 153         vnode_t         uu_vreclaims;
 154                 struct user_sigaltstack uu_sigstk;
 155 #ifdef JOE_DEBUG
 156         int             uu_iocount;
 157         int             uu_vpindex;
 158         void    *       uu_vps[32];
 159 #endif
 160 };
 161
 162 typedef struct uthread * uthread_t;
 163
 164 /* Definition of uu_flag */
 165 #define UT_SAS_OLDMASK  0x00000001      /* need to restore mask before pause */
 166 #define UT_NO_SIGMASK   0x00000002      /* exited thread; invalid sigmask */
 167 #define UT_NOTCANCELPT  0x00000004             /* not a cancelation point */
 168 #define UT_CANCEL       0x00000008             /* thread marked for cancel */
 169 #define UT_CANCELED     0x00000010            /* thread cancelled */
 170 #define UT_CANCELDISABLE 0x00000020            /* thread cancel disabled */
 171 #define UT_ALTSTACK 0x00000040  /* this thread has alt stack for signals */
 172
 173 #define UT_VFORK        0x02000000      /* thread has vfork children */
 174 #define UT_SETUID       0x04000000      /* thread is settugid() */
 175 #define UT_WASSETUID    0x08000000      /* thread was settugid() (in vfork) */
 176
 177 #endif /* __APPLE_API_PRIVATE */
 178
 179 #endif  /* KERNEL */
 180
 181 /*
 182  * Per process structure containing data that isn't needed in core
 183  * when the process isn't running (esp. when swapped out).
 184  * This structure may or may not be at the same kernel address
 185  * in all processes.
 186  */
 187
 188 struct  user {
 189   /* NOT USED ANYMORE */
 190 };
 191
 192 #endif  /* !_SYS_USER_H_ */