kern - Do not allow calls to vmspace_president_count() from userland.
[dragonfly.git] / sys / kern / kern_kinfo.c
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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 *
bcdbc1b1 35 * $DragonFly: src/sys/kern/kern_kinfo.c,v 1.17 2008/01/07 23:41:55 dillon Exp $
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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>
b5d16701 52#include <sys/mplock2.h>
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53#include <sys/globaldata.h>
54#ifdef _KERNEL
55#include <sys/systm.h>
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56#include <sys/sysref.h>
57#include <sys/sysref2.h>
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58#else
59#include <string.h>
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60
61dev_t dev2udev(cdev_t dev); /* kvm_proc.c */
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62#endif
63
64
65/*
66 * Fill in a struct kinfo_proc.
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67 *
68 * NOTE! We may be asked to fill in kinfo_proc for a zombied process, and
69 * the process may be in the middle of being deallocated. Check all pointers
70 * for NULL.
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71 */
72void
73fill_kinfo_proc(struct proc *p, struct kinfo_proc *kp)
74{
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75 struct session *sess;
76 struct pgrp *pgrp;
b12defdc 77 struct vmspace *vm;
dd416fb0 78
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79 pgrp = p->p_pgrp;
80 sess = pgrp ? pgrp->pg_session : NULL;
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81
82 bzero(kp, sizeof(*kp));
83
84 kp->kp_paddr = (uintptr_t)p;
85 kp->kp_fd = (uintptr_t)p->p_fd;
86
87 kp->kp_flags = p->p_flag;
88 kp->kp_stat = p->p_stat;
89 kp->kp_lock = p->p_lock;
90 kp->kp_acflag = p->p_acflag;
91 kp->kp_traceflag = p->p_traceflag;
92 kp->kp_siglist = p->p_siglist;
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93 if (p->p_sigacts) {
94 kp->kp_sigignore = p->p_sigignore; /* p_sigacts-> */
95 kp->kp_sigcatch = p->p_sigcatch; /* p_sigacts-> */
96 kp->kp_sigflag = p->p_sigacts->ps_flag;
97 }
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98 kp->kp_start = p->p_start;
99
100 strncpy(kp->kp_comm, p->p_comm, sizeof(kp->kp_comm) - 1);
101 kp->kp_comm[sizeof(kp->kp_comm) - 1] = 0;
102
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103 if (p->p_ucred) {
104 kp->kp_uid = p->p_ucred->cr_uid;
105 kp->kp_ngroups = p->p_ucred->cr_ngroups;
106 if (p->p_ucred->cr_groups) {
107 bcopy(p->p_ucred->cr_groups, kp->kp_groups,
108 NGROUPS * sizeof(kp->kp_groups[0]));
109 }
110 kp->kp_ruid = p->p_ucred->cr_ruid;
111 kp->kp_svuid = p->p_ucred->cr_svuid;
112 kp->kp_rgid = p->p_ucred->cr_rgid;
113 kp->kp_svgid = p->p_ucred->cr_svgid;
114 }
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115
116 kp->kp_pid = p->p_pid;
117 if (p->p_oppid != 0)
118 kp->kp_ppid = p->p_oppid;
119 else
75a28206 120 kp->kp_ppid = p->p_pptr != NULL ? p->p_pptr->p_pid : -1;
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121 if (pgrp) {
122 kp->kp_pgid = pgrp->pg_id;
123 kp->kp_jobc = pgrp->pg_jobc;
124 }
125 if (sess) {
126 kp->kp_sid = sess->s_sid;
127 bcopy(sess->s_login, kp->kp_login, MAXLOGNAME);
128 if (sess->s_ttyvp != NULL)
129 kp->kp_auxflags |= KI_CTTY;
4005878e 130 if ((p->p_session != NULL) && SESS_LEADER(p))
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131 kp->kp_auxflags |= KI_SLEADER;
132 }
133 if (sess && (p->p_flag & P_CONTROLT) != 0 && sess->s_ttyp != NULL) {
0e9b9130 134 kp->kp_tdev = dev2udev(sess->s_ttyp->t_dev);
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135 if (sess->s_ttyp->t_pgrp != NULL)
136 kp->kp_tpgid = sess->s_ttyp->t_pgrp->pg_id;
137 else
75a28206 138 kp->kp_tpgid = -1;
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139 if (sess->s_ttyp->t_session != NULL)
140 kp->kp_tsid = sess->s_ttyp->t_session->s_sid;
141 else
142 kp->kp_tsid = -1;
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143 } else {
144 kp->kp_tdev = NOUDEV;
145 }
146 kp->kp_exitstat = p->p_xstat;
147 kp->kp_nthreads = p->p_nthreads;
148 kp->kp_nice = p->p_nice;
08f2f1bb 149 kp->kp_swtime = p->p_swtime;
5dfd06ac 150
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151 if ((vm = p->p_vmspace) != NULL) {
152#ifdef _KERNEL
153 sysref_get(&vm->vm_sysref);
154 lwkt_gettoken(&vm->vm_map.token);
155#endif
156 kp->kp_vm_map_size = vm->vm_map.size;
157 kp->kp_vm_rssize = vmspace_resident_count(vm);
acdfde5e 158#ifdef _KERNEL
b12defdc 159 kp->kp_vm_prssize = vmspace_president_count(vm);
acdfde5e 160#endif
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161 kp->kp_vm_swrss = vm->vm_swrss;
162 kp->kp_vm_tsize = vm->vm_tsize;
163 kp->kp_vm_dsize = vm->vm_dsize;
164 kp->kp_vm_ssize = vm->vm_ssize;
165#ifdef _KERNEL
166 lwkt_reltoken(&vm->vm_map.token);
167 sysref_put(&vm->vm_sysref);
168#endif
bcdbc1b1 169 }
5dfd06ac 170
bcdbc1b1 171 if (p->p_ucred && jailed(p->p_ucred))
d3f0662c 172 kp->kp_jailid = p->p_ucred->cr_prison->pr_id;
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173
174 kp->kp_ru = p->p_ru;
dc09a5a3 175 kp->kp_cru = p->p_cru;
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176}
177
178/*
179 * Fill in a struct kinfo_lwp.
180 */
181void
182fill_kinfo_lwp(struct lwp *lwp, struct kinfo_lwp *kl)
183{
184 bzero(kl, sizeof(*kl));
185
186 kl->kl_pid = lwp->lwp_proc->p_pid;
187 kl->kl_tid = lwp->lwp_tid;
188
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189 kl->kl_flags = lwp->lwp_flag;
190 kl->kl_stat = lwp->lwp_stat;
cc1d939b 191 kl->kl_lock = lwp->lwp_lock;
5dfd06ac 192 kl->kl_tdflags = lwp->lwp_thread->td_flags;
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193
194 /*
195 * The process/lwp stat may not reflect whether the process is
196 * actually sleeping or not if the related thread was directly
197 * descheduled by LWKT. Adjust the stat if the thread is not
198 * runnable and not waiting to be scheduled on a cpu by the
199 * user process scheduler.
200 */
201 if (kl->kl_stat == LSRUN) {
202 if ((kl->kl_tdflags & TDF_RUNQ) == 0 &&
203 (lwp->lwp_flag & LWP_ONRUNQ) == 0) {
204 kl->kl_stat = LSSLEEP;
205 }
206 }
5dfd06ac 207#ifdef SMP
b5d16701 208 kl->kl_mpcount = get_mplock_count(lwp->lwp_thread);
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209#else
210 kl->kl_mpcount = 0;
211#endif
212
213 kl->kl_prio = lwp->lwp_usdata.bsd4.priority; /* XXX TGEN dangerous assumption */
214 kl->kl_tdprio = lwp->lwp_thread->td_pri;
215 kl->kl_rtprio = lwp->lwp_rtprio;
216
217 kl->kl_uticks = lwp->lwp_thread->td_uticks;
218 kl->kl_sticks = lwp->lwp_thread->td_sticks;
219 kl->kl_iticks = lwp->lwp_thread->td_iticks;
220 kl->kl_cpticks = lwp->lwp_cpticks;
221 kl->kl_pctcpu = lwp->lwp_pctcpu;
5dfd06ac 222 kl->kl_slptime = lwp->lwp_slptime;
52cac9fb 223 kl->kl_origcpu = lwp->lwp_usdata.bsd4.batch;
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224 kl->kl_estcpu = lwp->lwp_usdata.bsd4.estcpu;
225 kl->kl_cpuid = lwp->lwp_thread->td_gd->gd_cpuid;
226
227 kl->kl_ru = lwp->lwp_ru;
228
229 kl->kl_siglist = lwp->lwp_siglist;
230 kl->kl_sigmask = lwp->lwp_sigmask;
231
232 kl->kl_wchan = (uintptr_t)lwp->lwp_thread->td_wchan;
233 if (lwp->lwp_thread->td_wmesg) {
234 strncpy(kl->kl_wmesg, lwp->lwp_thread->td_wmesg, WMESGLEN);
235 kl->kl_wmesg[WMESGLEN] = 0;
236 }
237}
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238
239/*
240 * Fill in a struct kinfo_proc for kernel threads (i.e. those without proc).
241 */
242void
243fill_kinfo_proc_kthread(struct thread *td, struct kinfo_proc *kp)
244{
245 bzero(kp, sizeof(*kp));
246
247 /*
248 * Fill in fake proc information and semi-fake lwp info.
249 */
250 kp->kp_pid = -1;
251 kp->kp_tdev = NOUDEV;
252 strncpy(kp->kp_comm, td->td_comm, sizeof(kp->kp_comm) - 1);
253 kp->kp_comm[sizeof(kp->kp_comm) - 1] = 0;
ef02d0e1 254 kp->kp_flags = P_SYSTEM;
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255 kp->kp_stat = SACTIVE;
256
ef02d0e1 257 kp->kp_lwp.kl_pid = -1;
2b0645c3 258 kp->kp_lwp.kl_tid = -1;
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259 kp->kp_lwp.kl_tdflags = td->td_flags;
260#ifdef SMP
b5d16701 261 kp->kp_lwp.kl_mpcount = get_mplock_count(td);
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262#else /* !SMP */
263 kp->kp_lwp.kl_mpcount = 0;
264#endif /* SMP */
265
266 kp->kp_lwp.kl_tdprio = td->td_pri;
267 kp->kp_lwp.kl_rtprio.type = RTP_PRIO_THREAD;
f9235b6d 268 kp->kp_lwp.kl_rtprio.prio = td->td_pri;
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269
270 kp->kp_lwp.kl_uticks = td->td_uticks;
271 kp->kp_lwp.kl_sticks = td->td_sticks;
272 kp->kp_lwp.kl_iticks = td->td_iticks;
273 kp->kp_lwp.kl_cpuid = td->td_gd->gd_cpuid;
274
275 kp->kp_lwp.kl_wchan = (uintptr_t)td->td_wchan;
f4cf4cb8 276 if (td->td_flags & TDF_RUNQ)
164b8401 277 kp->kp_lwp.kl_stat = LSRUN;
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278 else
279 kp->kp_lwp.kl_stat = LSSLEEP;
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280 if (td->td_wmesg) {
281 strncpy(kp->kp_lwp.kl_wmesg, td->td_wmesg, WMESGLEN);
282 kp->kp_lwp.kl_wmesg[WMESGLEN] = 0;
283 }
284}