sys/kern/kern_kinfo.c

   1 /*-
   2  * Copyright (c) 2007 The DragonFly Project.  All rights reserved.
   3  *
   4  * This code is derived from software contributed to The DragonFly Project
   5  * by Simon 'corecode' Schubert <corecode@fs.ei.tum.de>
   6  * by Thomas E. Spanjaard <tgen@netphreax.net>
   7  *
   8  * Redistribution and use in source and binary forms, with or without
   9  * modification, are permitted provided that the following conditions
  10  * are met:
  11  *
  12  * 1. Redistributions of source code must retain the above copyright
  13  *    notice, this list of conditions and the following disclaimer.
  14  * 2. Redistributions in binary form must reproduce the above copyright
  15  *    notice, this list of conditions and the following disclaimer in
  16  *    the documentation and/or other materials provided with the
  17  *    distribution.
  18  * 3. Neither the name of The DragonFly Project nor the names of its
  19  *    contributors may be used to endorse or promote products derived
  20  *    from this software without specific, prior written permission.
  21  *
  22  * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
  23  * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
  24  * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
  25  * FOR A PARTICULAR PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE
  26  * COPYRIGHT HOLDERS OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
  27  * INCIDENTAL, SPECIAL, EXEMPLARY OR CONSEQUENTIAL DAMAGES (INCLUDING,
  28  * BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
  29  * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED
  30  * AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
  31  * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT
  32  * OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
  33  * SUCH DAMAGE.
  34  *
  35  * $DragonFly: src/sys/kern/kern_kinfo.c,v 1.17 2008/01/07 23:41:55 dillon Exp $
  36  */
  37
  38 /*
  39  * This is a source file used by both the kernel and libkvm.
  40  */
  41
  42 #ifndef _KERNEL
  43 #define _KERNEL_STRUCTURES
  44 #endif
  45
  46 #include <sys/proc.h>
  47 #include <vm/vm_map.h>
  48 #include <sys/kinfo.h>
  49 #include <sys/tty.h>
  50 #include <sys/conf.h>
  51 #include <sys/jail.h>
  52 #include <sys/globaldata.h>
  53 #ifdef _KERNEL
  54 #include <sys/systm.h>
  55 #else
  56 #include <string.h>
  57 #endif
  58
  59
  60 /*
  61  * Fill in a struct kinfo_proc.
  62  *
  63  * NOTE!  We may be asked to fill in kinfo_proc for a zombied process, and
  64  * the process may be in the middle of being deallocated.  Check all pointers
  65  * for NULL.
  66  */
  67 void
  68 fill_kinfo_proc(struct proc *p, struct kinfo_proc *kp)
  69 {
  70         struct session *sess;
  71         struct pgrp *pgrp;
  72
  73         pgrp = p->p_pgrp;
  74         sess = pgrp ? pgrp->pg_session : NULL;
  75
  76         bzero(kp, sizeof(*kp));
  77
  78         kp->kp_paddr = (uintptr_t)p;
  79         kp->kp_fd = (uintptr_t)p->p_fd;
  80
  81         kp->kp_flags = p->p_flag;
  82         kp->kp_stat = p->p_stat;
  83         kp->kp_lock = p->p_lock;
  84         kp->kp_acflag = p->p_acflag;
  85         kp->kp_traceflag = p->p_traceflag;
  86         kp->kp_siglist = p->p_siglist;
  87         if (p->p_sigacts) {
  88                 kp->kp_sigignore = p->p_sigignore;      /* p_sigacts-> */
  89                 kp->kp_sigcatch = p->p_sigcatch;        /* p_sigacts-> */
  90                 kp->kp_sigflag = p->p_sigacts->ps_flag;
  91         }
  92         kp->kp_start = p->p_start;
  93
  94         strncpy(kp->kp_comm, p->p_comm, sizeof(kp->kp_comm) - 1);
  95         kp->kp_comm[sizeof(kp->kp_comm) - 1] = 0;
  96
  97         if (p->p_ucred) {
  98                 kp->kp_uid = p->p_ucred->cr_uid;
  99                 kp->kp_ngroups = p->p_ucred->cr_ngroups;
 100                 if (p->p_ucred->cr_groups) {
 101                         bcopy(p->p_ucred->cr_groups, kp->kp_groups,
 102                               NGROUPS * sizeof(kp->kp_groups[0]));
 103                 }
 104                 kp->kp_ruid = p->p_ucred->cr_ruid;
 105                 kp->kp_svuid = p->p_ucred->cr_svuid;
 106                 kp->kp_rgid = p->p_ucred->cr_rgid;
 107                 kp->kp_svgid = p->p_ucred->cr_svgid;
 108         }
 109
 110         kp->kp_pid = p->p_pid;
 111         if (p->p_oppid != 0)
 112                 kp->kp_ppid = p->p_oppid;
 113         else
 114                 kp->kp_ppid = p->p_pptr != NULL ? p->p_pptr->p_pid : -1;
 115         if (pgrp) {
 116                 kp->kp_pgid = pgrp->pg_id;
 117                 kp->kp_jobc = pgrp->pg_jobc;
 118         }
 119         if (sess) {
 120                 kp->kp_sid = sess->s_sid;
 121                 bcopy(sess->s_login, kp->kp_login, MAXLOGNAME);
 122                 if (sess->s_ttyvp != NULL)
 123                         kp->kp_auxflags |= KI_CTTY;
 124                 if (SESS_LEADER(p))
 125                         kp->kp_auxflags |= KI_SLEADER;
 126         }
 127         if (sess && (p->p_flag & P_CONTROLT) != 0 && sess->s_ttyp != NULL) {
 128                 kp->kp_tdev = dev2udev(sess->s_ttyp->t_dev);
 129                 if (sess->s_ttyp->t_pgrp != NULL)
 130                         kp->kp_tpgid = sess->s_ttyp->t_pgrp->pg_id;
 131                 else
 132                         kp->kp_tpgid = -1;
 133                 if (sess->s_ttyp->t_session != NULL)
 134                         kp->kp_tsid = sess->s_ttyp->t_session->s_sid;
 135                 else
 136                         kp->kp_tsid = -1;
 137         } else {
 138                 kp->kp_tdev = NOUDEV;
 139         }
 140         kp->kp_exitstat = p->p_xstat;
 141         kp->kp_nthreads = p->p_nthreads;
 142         kp->kp_nice = p->p_nice;
 143         kp->kp_swtime = p->p_swtime;
 144
 145         if (p->p_vmspace) {
 146                 kp->kp_vm_map_size = p->p_vmspace->vm_map.size;
 147                 kp->kp_vm_rssize = vmspace_resident_count(p->p_vmspace);
 148                 kp->kp_vm_swrss = p->p_vmspace->vm_swrss;
 149                 kp->kp_vm_tsize = p->p_vmspace->vm_tsize;
 150                 kp->kp_vm_dsize = p->p_vmspace->vm_dsize;
 151                 kp->kp_vm_ssize = p->p_vmspace->vm_ssize;
 152         }
 153
 154         if (p->p_ucred && jailed(p->p_ucred))
 155                 kp->kp_jailid = p->p_ucred->cr_prison->pr_id;
 156
 157         kp->kp_ru = p->p_ru;
 158         kp->kp_ru = p->p_cru;
 159 }
 160
 161 /*
 162  * Fill in a struct kinfo_lwp.
 163  */
 164 void
 165 fill_kinfo_lwp(struct lwp *lwp, struct kinfo_lwp *kl)
 166 {
 167         bzero(kl, sizeof(*kl));
 168
 169         kl->kl_pid = lwp->lwp_proc->p_pid;
 170         kl->kl_tid = lwp->lwp_tid;
 171
 172         kl->kl_flags = lwp->lwp_flag;
 173         kl->kl_stat = lwp->lwp_stat;
 174         kl->kl_lock = lwp->lwp_lock;
 175         kl->kl_tdflags = lwp->lwp_thread->td_flags;
 176
 177         /*
 178          * The process/lwp stat may not reflect whether the process is
 179          * actually sleeping or not if the related thread was directly
 180          * descheduled by LWKT.  Adjust the stat if the thread is not
 181          * runnable and not waiting to be scheduled on a cpu by the
 182          * user process scheduler.
 183          */
 184         if (kl->kl_stat == LSRUN) {
 185                 if ((kl->kl_tdflags & TDF_RUNQ) == 0 &&
 186                     (lwp->lwp_flag & LWP_ONRUNQ) == 0) {
 187                         kl->kl_stat = LSSLEEP;
 188                 }
 189         }
 190 #ifdef SMP
 191         kl->kl_mpcount = lwp->lwp_thread->td_mpcount;
 192 #else
 193         kl->kl_mpcount = 0;
 194 #endif
 195
 196         kl->kl_prio = lwp->lwp_usdata.bsd4.priority;    /* XXX TGEN dangerous assumption */
 197         kl->kl_tdprio = lwp->lwp_thread->td_pri;
 198         kl->kl_rtprio = lwp->lwp_rtprio;
 199
 200         kl->kl_uticks = lwp->lwp_thread->td_uticks;
 201         kl->kl_sticks = lwp->lwp_thread->td_sticks;
 202         kl->kl_iticks = lwp->lwp_thread->td_iticks;
 203         kl->kl_cpticks = lwp->lwp_cpticks;
 204         kl->kl_pctcpu = lwp->lwp_pctcpu;
 205         kl->kl_slptime = lwp->lwp_slptime;
 206         kl->kl_origcpu = lwp->lwp_usdata.bsd4.origcpu;  /* XXX TGEN same */
 207         kl->kl_estcpu = lwp->lwp_usdata.bsd4.estcpu;
 208         kl->kl_cpuid = lwp->lwp_thread->td_gd->gd_cpuid;
 209
 210         kl->kl_ru = lwp->lwp_ru;
 211
 212         kl->kl_siglist = lwp->lwp_siglist;
 213         kl->kl_sigmask = lwp->lwp_sigmask;
 214
 215         kl->kl_wchan = (uintptr_t)lwp->lwp_thread->td_wchan;
 216         if (lwp->lwp_thread->td_wmesg) {
 217                 strncpy(kl->kl_wmesg, lwp->lwp_thread->td_wmesg, WMESGLEN);
 218                 kl->kl_wmesg[WMESGLEN] = 0;
 219         }
 220 }
 221
 222 /*
 223  * Fill in a struct kinfo_proc for kernel threads (i.e. those without proc).
 224  */
 225 void
 226 fill_kinfo_proc_kthread(struct thread *td, struct kinfo_proc *kp)
 227 {
 228         bzero(kp, sizeof(*kp));
 229
 230         /*
 231          * Fill in fake proc information and semi-fake lwp info.
 232          */
 233         kp->kp_pid = -1;
 234         kp->kp_tdev = NOUDEV;
 235         strncpy(kp->kp_comm, td->td_comm, sizeof(kp->kp_comm) - 1);
 236         kp->kp_comm[sizeof(kp->kp_comm) - 1] = 0;
 237         kp->kp_flags = P_SYSTEM;
 238         kp->kp_stat = SACTIVE;
 239
 240         kp->kp_lwp.kl_pid = -1;
 241         kp->kp_lwp.kl_tid = -1;
 242         kp->kp_lwp.kl_tdflags = td->td_flags;
 243 #ifdef SMP
 244         kp->kp_lwp.kl_mpcount = td->td_mpcount;
 245 #else /* !SMP */
 246         kp->kp_lwp.kl_mpcount = 0;
 247 #endif /* SMP */
 248
 249         kp->kp_lwp.kl_tdprio = td->td_pri;
 250         kp->kp_lwp.kl_rtprio.type = RTP_PRIO_THREAD;
 251         kp->kp_lwp.kl_rtprio.prio = td->td_pri & TDPRI_MASK;
 252
 253         kp->kp_lwp.kl_uticks = td->td_uticks;
 254         kp->kp_lwp.kl_sticks = td->td_sticks;
 255         kp->kp_lwp.kl_iticks = td->td_iticks;
 256         kp->kp_lwp.kl_cpuid = td->td_gd->gd_cpuid;
 257
 258         kp->kp_lwp.kl_wchan = (uintptr_t)td->td_wchan;
 259         if (td->td_flags & TDF_RUNQ)
 260                 kp->kp_lwp.kl_stat = LSRUN;
 261         else
 262                 kp->kp_lwp.kl_stat = LSSLEEP;
 263         if (td->td_wmesg) {
 264                 strncpy(kp->kp_lwp.kl_wmesg, td->td_wmesg, WMESGLEN);
 265                 kp->kp_lwp.kl_wmesg[WMESGLEN] = 0;
 266         }
 267 }