xref: /freebsd/sys/compat/linprocfs/linprocfs.c (revision ec0ea6efa1ad229d75c394c1a9b9cac33af2b1d3)
1 /*-
2  * SPDX-License-Identifier: BSD-4-Clause
3  *
4  * Copyright (c) 2000 Dag-Erling Coïdan Smørgrav
5  * Copyright (c) 1999 Pierre Beyssac
6  * Copyright (c) 1993 Jan-Simon Pendry
7  * Copyright (c) 1993
8  *	The Regents of the University of California.  All rights reserved.
9  *
10  * This code is derived from software contributed to Berkeley by
11  * Jan-Simon Pendry.
12  *
13  * Redistribution and use in source and binary forms, with or without
14  * modification, are permitted provided that the following conditions
15  * are met:
16  * 1. Redistributions of source code must retain the above copyright
17  *    notice, this list of conditions and the following disclaimer.
18  * 2. Redistributions in binary form must reproduce the above copyright
19  *    notice, this list of conditions and the following disclaimer in the
20  *    documentation and/or other materials provided with the distribution.
21  * 3. All advertising materials mentioning features or use of this software
22  *    must display the following acknowledgement:
23  *	This product includes software developed by the University of
24  *	California, Berkeley and its contributors.
25  * 4. Neither the name of the University nor the names of its contributors
26  *    may be used to endorse or promote products derived from this software
27  *    without specific prior written permission.
28  *
29  * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
30  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
31  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
32  * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
33  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
34  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
35  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
36  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
37  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
38  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
39  * SUCH DAMAGE.
40  *
41  *	@(#)procfs_status.c	8.4 (Berkeley) 6/15/94
42  */
43 
44 #include <sys/cdefs.h>
45 __FBSDID("$FreeBSD$");
46 
47 #include <sys/param.h>
48 #include <sys/queue.h>
49 #include <sys/blist.h>
50 #include <sys/conf.h>
51 #include <sys/exec.h>
52 #include <sys/fcntl.h>
53 #include <sys/filedesc.h>
54 #include <sys/jail.h>
55 #include <sys/kernel.h>
56 #include <sys/limits.h>
57 #include <sys/linker.h>
58 #include <sys/lock.h>
59 #include <sys/malloc.h>
60 #include <sys/msg.h>
61 #include <sys/mutex.h>
62 #include <sys/namei.h>
63 #include <sys/proc.h>
64 #include <sys/ptrace.h>
65 #include <sys/resourcevar.h>
66 #include <sys/resource.h>
67 #include <sys/sbuf.h>
68 #include <sys/sem.h>
69 #include <sys/shm.h>
70 #include <sys/smp.h>
71 #include <sys/socket.h>
72 #include <sys/syscallsubr.h>
73 #include <sys/sysctl.h>
74 #include <sys/sysent.h>
75 #include <sys/systm.h>
76 #include <sys/time.h>
77 #include <sys/tty.h>
78 #include <sys/user.h>
79 #include <sys/uuid.h>
80 #include <sys/vmmeter.h>
81 #include <sys/vnode.h>
82 #include <sys/bus.h>
83 
84 #include <net/if.h>
85 #include <net/if_var.h>
86 #include <net/if_types.h>
87 
88 #include <vm/vm.h>
89 #include <vm/vm_extern.h>
90 #include <vm/pmap.h>
91 #include <vm/vm_map.h>
92 #include <vm/vm_param.h>
93 #include <vm/vm_object.h>
94 #include <vm/swap_pager.h>
95 
96 #include <machine/clock.h>
97 
98 #include <geom/geom.h>
99 #include <geom/geom_int.h>
100 
101 #if defined(__i386__) || defined(__amd64__)
102 #include <machine/cputypes.h>
103 #include <machine/md_var.h>
104 #endif /* __i386__ || __amd64__ */
105 
106 #include <compat/linux/linux.h>
107 #include <compat/linux/linux_mib.h>
108 #include <compat/linux/linux_misc.h>
109 #include <compat/linux/linux_util.h>
110 #include <fs/pseudofs/pseudofs.h>
111 #include <fs/procfs/procfs.h>
112 
113 /*
114  * Various conversion macros
115  */
116 #define T2J(x) ((long)(((x) * 100ULL) / (stathz ? stathz : hz)))	/* ticks to jiffies */
117 #define T2CS(x) ((unsigned long)(((x) * 100ULL) / (stathz ? stathz : hz)))	/* ticks to centiseconds */
118 #define T2S(x) ((x) / (stathz ? stathz : hz))		/* ticks to seconds */
119 #define B2K(x) ((x) >> 10)				/* bytes to kbytes */
120 #define B2P(x) ((x) >> PAGE_SHIFT)			/* bytes to pages */
121 #define P2B(x) ((x) << PAGE_SHIFT)			/* pages to bytes */
122 #define P2K(x) ((x) << (PAGE_SHIFT - 10))		/* pages to kbytes */
123 #define TV2J(x)	((x)->tv_sec * 100UL + (x)->tv_usec / 10000)
124 
125 /**
126  * @brief Mapping of ki_stat in struct kinfo_proc to the linux state
127  *
128  * The linux procfs state field displays one of the characters RSDZTW to
129  * denote running, sleeping in an interruptible wait, waiting in an
130  * uninterruptible disk sleep, a zombie process, process is being traced
131  * or stopped, or process is paging respectively.
132  *
133  * Our struct kinfo_proc contains the variable ki_stat which contains a
134  * value out of SIDL, SRUN, SSLEEP, SSTOP, SZOMB, SWAIT and SLOCK.
135  *
136  * This character array is used with ki_stati-1 as an index and tries to
137  * map our states to suitable linux states.
138  */
139 static char linux_state[] = "RRSTZDD";
140 
141 /*
142  * Filler function for proc/meminfo
143  */
144 static int
145 linprocfs_domeminfo(PFS_FILL_ARGS)
146 {
147 	unsigned long memtotal;		/* total memory in bytes */
148 	unsigned long memfree;		/* free memory in bytes */
149 	unsigned long cached;		/* page cache */
150 	unsigned long buffers;		/* buffer cache */
151 	unsigned long long swaptotal;	/* total swap space in bytes */
152 	unsigned long long swapused;	/* used swap space in bytes */
153 	unsigned long long swapfree;	/* free swap space in bytes */
154 	size_t sz;
155 	int error, i, j;
156 
157 	memtotal = physmem * PAGE_SIZE;
158 	memfree = (unsigned long)vm_free_count() * PAGE_SIZE;
159 	swap_pager_status(&i, &j);
160 	swaptotal = (unsigned long long)i * PAGE_SIZE;
161 	swapused = (unsigned long long)j * PAGE_SIZE;
162 	swapfree = swaptotal - swapused;
163 
164 	/*
165 	 * This value may exclude wired pages, but we have no good way of
166 	 * accounting for that.
167 	 */
168 	cached =
169 	    (vm_active_count() + vm_inactive_count() + vm_laundry_count()) *
170 	    PAGE_SIZE;
171 
172 	sz = sizeof(buffers);
173 	error = kernel_sysctlbyname(curthread, "vfs.bufspace", &buffers, &sz,
174 	    NULL, 0, 0, 0);
175 	if (error != 0)
176 		buffers = 0;
177 
178 	sbuf_printf(sb,
179 	    "MemTotal: %9lu kB\n"
180 	    "MemFree:  %9lu kB\n"
181 	    "Buffers:  %9lu kB\n"
182 	    "Cached:   %9lu kB\n"
183 	    "SwapTotal:%9llu kB\n"
184 	    "SwapFree: %9llu kB\n",
185 	    B2K(memtotal), B2K(memfree), B2K(buffers),
186 	    B2K(cached), B2K(swaptotal), B2K(swapfree));
187 
188 	return (0);
189 }
190 
191 #if defined(__i386__) || defined(__amd64__)
192 /*
193  * Filler function for proc/cpuinfo (i386 & amd64 version)
194  */
195 static int
196 linprocfs_docpuinfo(PFS_FILL_ARGS)
197 {
198 	int hw_model[2];
199 	char model[128];
200 	uint64_t freq;
201 	size_t size;
202 	u_int cache_size[4];
203 	int fqmhz, fqkhz;
204 	int i, j;
205 
206 	/*
207 	 * We default the flags to include all non-conflicting flags,
208 	 * and the Intel versions of conflicting flags.
209 	 */
210 	static char *cpu_feature_names[] = {
211 		/*  0 */ "fpu", "vme", "de", "pse",
212 		/*  4 */ "tsc", "msr", "pae", "mce",
213 		/*  8 */ "cx8", "apic", "", "sep",
214 		/* 12 */ "mtrr", "pge", "mca", "cmov",
215 		/* 16 */ "pat", "pse36", "pn", "clflush",
216 		/* 20 */ "", "dts", "acpi", "mmx",
217 		/* 24 */ "fxsr", "sse", "sse2", "ss",
218 		/* 28 */ "ht", "tm", "ia64", "pbe"
219 	};
220 
221 	static char *amd_feature_names[] = {
222 		/*  0 */ "", "", "", "",
223 		/*  4 */ "", "", "", "",
224 		/*  8 */ "", "", "", "syscall",
225 		/* 12 */ "", "", "", "",
226 		/* 16 */ "", "", "", "mp",
227 		/* 20 */ "nx", "", "mmxext", "",
228 		/* 24 */ "", "fxsr_opt", "pdpe1gb", "rdtscp",
229 		/* 28 */ "", "lm", "3dnowext", "3dnow"
230 	};
231 
232 	static char *cpu_feature2_names[] = {
233 		/*  0 */ "pni", "pclmulqdq", "dtes64", "monitor",
234 		/*  4 */ "ds_cpl", "vmx", "smx", "est",
235 		/*  8 */ "tm2", "ssse3", "cid", "sdbg",
236 		/* 12 */ "fma", "cx16", "xtpr", "pdcm",
237 		/* 16 */ "", "pcid", "dca", "sse4_1",
238 		/* 20 */ "sse4_2", "x2apic", "movbe", "popcnt",
239 		/* 24 */ "tsc_deadline_timer", "aes", "xsave", "",
240 		/* 28 */ "avx", "f16c", "rdrand", "hypervisor"
241 	};
242 
243 	static char *amd_feature2_names[] = {
244 		/*  0 */ "lahf_lm", "cmp_legacy", "svm", "extapic",
245 		/*  4 */ "cr8_legacy", "abm", "sse4a", "misalignsse",
246 		/*  8 */ "3dnowprefetch", "osvw", "ibs", "xop",
247 		/* 12 */ "skinit", "wdt", "", "lwp",
248 		/* 16 */ "fma4", "tce", "", "nodeid_msr",
249 		/* 20 */ "", "tbm", "topoext", "perfctr_core",
250 		/* 24 */ "perfctr_nb", "", "bpext", "ptsc",
251 		/* 28 */ "perfctr_llc", "mwaitx", "", ""
252 	};
253 
254 	static char *cpu_stdext_feature_names[] = {
255 		/*  0 */ "fsgsbase", "tsc_adjust", "", "bmi1",
256 		/*  4 */ "hle", "avx2", "", "smep",
257 		/*  8 */ "bmi2", "erms", "invpcid", "rtm",
258 		/* 12 */ "cqm", "", "mpx", "rdt_a",
259 		/* 16 */ "avx512f", "avx512dq", "rdseed", "adx",
260 		/* 20 */ "smap", "avx512ifma", "", "clflushopt",
261 		/* 24 */ "clwb", "intel_pt", "avx512pf", "avx512er",
262 		/* 28 */ "avx512cd", "sha_ni", "avx512bw", "avx512vl"
263 	};
264 
265 	static char *power_flags[] = {
266 		"ts",           "fid",          "vid",
267 		"ttp",          "tm",           "stc",
268 		"100mhzsteps",  "hwpstate",     "",
269 		"cpb",          "eff_freq_ro",  "proc_feedback",
270 		"acc_power",
271 	};
272 
273 	hw_model[0] = CTL_HW;
274 	hw_model[1] = HW_MODEL;
275 	model[0] = '\0';
276 	size = sizeof(model);
277 	if (kernel_sysctl(td, hw_model, 2, &model, &size, 0, 0, 0, 0) != 0)
278 		strcpy(model, "unknown");
279 #ifdef __i386__
280 	switch (cpu_vendor_id) {
281 	case CPU_VENDOR_AMD:
282 		if (cpu_class < CPUCLASS_686)
283 			cpu_feature_names[16] = "fcmov";
284 		break;
285 	case CPU_VENDOR_CYRIX:
286 		cpu_feature_names[24] = "cxmmx";
287 		break;
288 	}
289 #endif
290 	if (cpu_exthigh >= 0x80000006)
291 		do_cpuid(0x80000006, cache_size);
292 	else
293 		memset(cache_size, 0, sizeof(cache_size));
294 	for (i = 0; i < mp_ncpus; ++i) {
295 		fqmhz = 0;
296 		fqkhz = 0;
297 		freq = atomic_load_acq_64(&tsc_freq);
298 		if (freq != 0) {
299 			fqmhz = (freq + 4999) / 1000000;
300 			fqkhz = ((freq + 4999) / 10000) % 100;
301 		}
302 		sbuf_printf(sb,
303 		    "processor\t: %d\n"
304 		    "vendor_id\t: %.20s\n"
305 		    "cpu family\t: %u\n"
306 		    "model\t\t: %u\n"
307 		    "model name\t: %s\n"
308 		    "stepping\t: %u\n"
309 		    "cpu MHz\t\t: %d.%02d\n"
310 		    "cache size\t: %d KB\n"
311 		    "physical id\t: %d\n"
312 		    "siblings\t: %d\n"
313 		    "core id\t\t: %d\n"
314 		    "cpu cores\t: %d\n"
315 		    "apicid\t\t: %d\n"
316 		    "initial apicid\t: %d\n"
317 		    "fpu\t\t: %s\n"
318 		    "fpu_exception\t: %s\n"
319 		    "cpuid level\t: %d\n"
320 		    "wp\t\t: %s\n",
321 		    i, cpu_vendor, CPUID_TO_FAMILY(cpu_id),
322 		    CPUID_TO_MODEL(cpu_id), model, cpu_id & CPUID_STEPPING,
323 		    fqmhz, fqkhz,
324 		    (cache_size[2] >> 16), 0, mp_ncpus, i, mp_ncpus,
325 		    i, i, /*cpu_id & CPUID_LOCAL_APIC_ID ??*/
326 		    (cpu_feature & CPUID_FPU) ? "yes" : "no", "yes",
327 		    CPUID_TO_FAMILY(cpu_id), "yes");
328 		sbuf_cat(sb, "flags\t\t:");
329 		for (j = 0; j < nitems(cpu_feature_names); j++)
330 			if (cpu_feature & (1 << j) &&
331 			    cpu_feature_names[j][0] != '\0')
332 				sbuf_printf(sb, " %s", cpu_feature_names[j]);
333 		for (j = 0; j < nitems(amd_feature_names); j++)
334 			if (amd_feature & (1 << j) &&
335 			    amd_feature_names[j][0] != '\0')
336 				sbuf_printf(sb, " %s", amd_feature_names[j]);
337 		for (j = 0; j < nitems(cpu_feature2_names); j++)
338 			if (cpu_feature2 & (1 << j) &&
339 			    cpu_feature2_names[j][0] != '\0')
340 				sbuf_printf(sb, " %s", cpu_feature2_names[j]);
341 		for (j = 0; j < nitems(amd_feature2_names); j++)
342 			if (amd_feature2 & (1 << j) &&
343 			    amd_feature2_names[j][0] != '\0')
344 				sbuf_printf(sb, " %s", amd_feature2_names[j]);
345 		for (j = 0; j < nitems(cpu_stdext_feature_names); j++)
346 			if (cpu_stdext_feature & (1 << j) &&
347 			    cpu_stdext_feature_names[j][0] != '\0')
348 				sbuf_printf(sb, " %s",
349 				    cpu_stdext_feature_names[j]);
350 		sbuf_cat(sb, "\n");
351 		sbuf_printf(sb,
352 		    "bugs\t\t: %s\n"
353 		    "bogomips\t: %d.%02d\n"
354 		    "clflush size\t: %d\n"
355 		    "cache_alignment\t: %d\n"
356 		    "address sizes\t: %d bits physical, %d bits virtual\n",
357 #if defined(I586_CPU) && !defined(NO_F00F_HACK)
358 		    (has_f00f_bug) ? "Intel F00F" : "",
359 #else
360 		    "",
361 #endif
362 		    fqmhz * 2, fqkhz,
363 		    cpu_clflush_line_size, cpu_clflush_line_size,
364 		    cpu_maxphyaddr,
365 		    (cpu_maxphyaddr > 32) ? 48 : 0);
366 		sbuf_cat(sb, "power management: ");
367 		for (j = 0; j < nitems(power_flags); j++)
368 			if (amd_pminfo & (1 << j))
369 				sbuf_printf(sb, " %s", power_flags[j]);
370 		sbuf_cat(sb, "\n\n");
371 
372 		/* XXX per-cpu vendor / class / model / id? */
373 	}
374 	sbuf_cat(sb, "\n");
375 
376 	return (0);
377 }
378 #else
379 /* ARM64TODO: implement non-stubbed linprocfs_docpuinfo */
380 static int
381 linprocfs_docpuinfo(PFS_FILL_ARGS)
382 {
383 	int i;
384 
385 	for (i = 0; i < mp_ncpus; ++i) {
386 		sbuf_printf(sb,
387 		    "processor\t: %d\n"
388 		    "BogoMIPS\t: %d.%02d\n",
389 		    i, 0, 0);
390 		sbuf_cat(sb, "Features\t: ");
391 		sbuf_cat(sb, "\n");
392 		sbuf_printf(sb,
393 		    "CPU implementer\t: \n"
394 		    "CPU architecture: \n"
395 		    "CPU variant\t: 0x%x\n"
396 		    "CPU part\t: 0x%x\n"
397 		    "CPU revision\t: %d\n",
398 		    0, 0, 0);
399 		sbuf_cat(sb, "\n");
400 	}
401 
402 	return (0);
403 }
404 #endif /* __i386__ || __amd64__ */
405 
406 static const char *path_slash_sys = "/sys";
407 static const char *fstype_sysfs = "sysfs";
408 
409 static int
410 _mtab_helper(const struct pfs_node *pn, const struct statfs *sp,
411     const char **mntfrom, const char **mntto, const char **fstype)
412 {
413 	/* determine device name */
414 	*mntfrom = sp->f_mntfromname;
415 
416 	/* determine mount point */
417 	*mntto = sp->f_mntonname;
418 
419 	/* determine fs type */
420 	*fstype = sp->f_fstypename;
421 	if (strcmp(*fstype, pn->pn_info->pi_name) == 0)
422 		*mntfrom = *fstype = "proc";
423 	else if (strcmp(*fstype, "procfs") == 0)
424 		return (ECANCELED);
425 
426 	if (strcmp(*fstype, "autofs") == 0) {
427 		/*
428 		 * FreeBSD uses eg "map -hosts", whereas Linux
429 		 * expects just "-hosts".
430 		 */
431 		if (strncmp(*mntfrom, "map ", 4) == 0)
432 			*mntfrom += 4;
433 	}
434 
435 	if (strcmp(*fstype, "linsysfs") == 0) {
436 		*mntfrom = path_slash_sys;
437 		*fstype = fstype_sysfs;
438 	} else {
439 		/* For Linux msdosfs is called vfat */
440 		if (strcmp(*fstype, "msdosfs") == 0)
441 			*fstype = "vfat";
442 	}
443 	return (0);
444 }
445 
446 static void
447 _sbuf_mntoptions_helper(struct sbuf *sb, uint64_t f_flags)
448 {
449 	sbuf_cat(sb, (f_flags & MNT_RDONLY) ? "ro" : "rw");
450 #define ADD_OPTION(opt, name) \
451 	if (f_flags & (opt)) sbuf_cat(sb, "," name);
452 	ADD_OPTION(MNT_SYNCHRONOUS,	"sync");
453 	ADD_OPTION(MNT_NOEXEC,		"noexec");
454 	ADD_OPTION(MNT_NOSUID,		"nosuid");
455 	ADD_OPTION(MNT_UNION,		"union");
456 	ADD_OPTION(MNT_ASYNC,		"async");
457 	ADD_OPTION(MNT_SUIDDIR,		"suiddir");
458 	ADD_OPTION(MNT_NOSYMFOLLOW,	"nosymfollow");
459 	ADD_OPTION(MNT_NOATIME,		"noatime");
460 #undef ADD_OPTION
461 }
462 
463 /*
464  * Filler function for proc/mtab and proc/<pid>/mounts.
465  *
466  * /proc/mtab doesn't exist in Linux' procfs, but is included here so
467  * users can symlink /compat/linux/etc/mtab to /proc/mtab
468  */
469 static int
470 linprocfs_domtab(PFS_FILL_ARGS)
471 {
472 	struct nameidata nd;
473 	const char *lep, *mntto, *mntfrom, *fstype;
474 	char *dlep, *flep;
475 	size_t lep_len;
476 	int error;
477 	struct statfs *buf, *sp;
478 	size_t count;
479 
480 	/* resolve symlinks etc. in the emulation tree prefix */
481 	/*
482 	 * Ideally, this would use the current chroot rather than some
483 	 * hardcoded path.
484 	 */
485 	NDINIT(&nd, LOOKUP, FOLLOW, UIO_SYSSPACE, linux_emul_path);
486 	flep = NULL;
487 	error = namei(&nd);
488 	lep = linux_emul_path;
489 	if (error == 0) {
490 		if (vn_fullpath(nd.ni_vp, &dlep, &flep) == 0)
491 			lep = dlep;
492 		vrele(nd.ni_vp);
493 	}
494 	lep_len = strlen(lep);
495 
496 	buf = NULL;
497 	error = kern_getfsstat(td, &buf, SIZE_T_MAX, &count,
498 	    UIO_SYSSPACE, MNT_WAIT);
499 	if (error != 0) {
500 		free(buf, M_TEMP);
501 		free(flep, M_TEMP);
502 		return (error);
503 	}
504 
505 	for (sp = buf; count > 0; sp++, count--) {
506 		error = _mtab_helper(pn, sp, &mntfrom, &mntto, &fstype);
507 		if (error != 0) {
508 			MPASS(error == ECANCELED);
509 			continue;
510 		}
511 
512 		/* determine mount point */
513 		if (strncmp(mntto, lep, lep_len) == 0 && mntto[lep_len] == '/')
514 			mntto += lep_len;
515 
516 		sbuf_printf(sb, "%s %s %s ", mntfrom, mntto, fstype);
517 		_sbuf_mntoptions_helper(sb, sp->f_flags);
518 		/* a real Linux mtab will also show NFS options */
519 		sbuf_printf(sb, " 0 0\n");
520 	}
521 
522 	free(buf, M_TEMP);
523 	free(flep, M_TEMP);
524 	return (error);
525 }
526 
527 static int
528 linprocfs_doprocmountinfo(PFS_FILL_ARGS)
529 {
530 	struct nameidata nd;
531 	const char *mntfrom, *mntto, *fstype;
532 	const char *lep;
533 	char *dlep, *flep;
534 	struct statfs *buf, *sp;
535 	size_t count, lep_len;
536 	int error;
537 
538 	/*
539 	 * Ideally, this would use the current chroot rather than some
540 	 * hardcoded path.
541 	 */
542 	NDINIT(&nd, LOOKUP, FOLLOW, UIO_SYSSPACE, linux_emul_path);
543 	flep = NULL;
544 	error = namei(&nd);
545 	lep = linux_emul_path;
546 	if (error == 0) {
547 		if (vn_fullpath(nd.ni_vp, &dlep, &flep) == 0)
548 			lep = dlep;
549 		vrele(nd.ni_vp);
550 	}
551 	lep_len = strlen(lep);
552 
553 	buf = NULL;
554 	error = kern_getfsstat(td, &buf, SIZE_T_MAX, &count,
555 	    UIO_SYSSPACE, MNT_WAIT);
556 	if (error != 0)
557 		goto out;
558 
559 	for (sp = buf; count > 0; sp++, count--) {
560 		error = _mtab_helper(pn, sp, &mntfrom, &mntto, &fstype);
561 		if (error != 0) {
562 			MPASS(error == ECANCELED);
563 			continue;
564 		}
565 
566 		if (strncmp(mntto, lep, lep_len) == 0 && mntto[lep_len] == '/')
567 			mntto += lep_len;
568 #if 0
569 		/*
570 		 * If the prefix is a chroot, and this mountpoint is not under
571 		 * the prefix, we should skip it.  Leave it for now for
572 		 * consistency with procmtab above.
573 		 */
574 		else
575 			continue;
576 #endif
577 
578 		/*
579 		 * (1) mount id
580 		 *
581 		 * (2) parent mount id -- we don't have this cheaply, so
582 		 * provide a dummy value
583 		 *
584 		 * (3) major:minor -- ditto
585 		 *
586 		 * (4) root filesystem mount -- probably a namespaces thing
587 		 *
588 		 * (5) mountto path
589 		 */
590 		sbuf_printf(sb, "%u 0 0:0 / %s ",
591 		    sp->f_fsid.val[0] ^ sp->f_fsid.val[1], mntto);
592 		/* (6) mount options */
593 		_sbuf_mntoptions_helper(sb, sp->f_flags);
594 		/*
595 		 * (7) zero or more optional fields -- again, namespace related
596 		 *
597 		 * (8) End of variable length fields separator ("-")
598 		 *
599 		 * (9) fstype
600 		 *
601 		 * (10) mount from
602 		 *
603 		 * (11) "superblock" options -- like (6), but different
604 		 * semantics in Linux
605 		 */
606 		sbuf_printf(sb, " - %s %s %s\n", fstype, mntfrom,
607 		    (sp->f_flags & MNT_RDONLY) ? "ro" : "rw");
608 	}
609 
610 	error = 0;
611 out:
612 	free(buf, M_TEMP);
613 	free(flep, M_TEMP);
614 	return (error);
615 }
616 
617 /*
618  * Filler function for proc/partitions
619  */
620 static int
621 linprocfs_dopartitions(PFS_FILL_ARGS)
622 {
623 	struct g_class *cp;
624 	struct g_geom *gp;
625 	struct g_provider *pp;
626 	int major, minor;
627 
628 	g_topology_lock();
629 	sbuf_printf(sb, "major minor  #blocks  name rio rmerge rsect "
630 	    "ruse wio wmerge wsect wuse running use aveq\n");
631 
632 	LIST_FOREACH(cp, &g_classes, class) {
633 		if (strcmp(cp->name, "DISK") == 0 ||
634 		    strcmp(cp->name, "PART") == 0)
635 			LIST_FOREACH(gp, &cp->geom, geom) {
636 				LIST_FOREACH(pp, &gp->provider, provider) {
637 					if (linux_driver_get_major_minor(
638 					    pp->name, &major, &minor) != 0) {
639 						major = 0;
640 						minor = 0;
641 					}
642 					sbuf_printf(sb, "%d %d %lld %s "
643 					    "%d %d %d %d %d "
644 					     "%d %d %d %d %d %d\n",
645 					     major, minor,
646 					     (long long)pp->mediasize, pp->name,
647 					     0, 0, 0, 0, 0,
648 					     0, 0, 0, 0, 0, 0);
649 				}
650 			}
651 	}
652 	g_topology_unlock();
653 
654 	return (0);
655 }
656 
657 /*
658  * Filler function for proc/stat
659  *
660  * Output depends on kernel version:
661  *
662  * v2.5.40 <=
663  *   user nice system idle
664  * v2.5.41
665  *   user nice system idle iowait
666  * v2.6.11
667  *   user nice system idle iowait irq softirq steal
668  * v2.6.24
669  *   user nice system idle iowait irq softirq steal guest
670  * v2.6.33 >=
671  *   user nice system idle iowait irq softirq steal guest guest_nice
672  */
673 static int
674 linprocfs_dostat(PFS_FILL_ARGS)
675 {
676 	struct pcpu *pcpu;
677 	long cp_time[CPUSTATES];
678 	long *cp;
679 	struct timeval boottime;
680 	int i;
681 	char *zero_pad;
682 	bool has_intr = true;
683 
684 	if (linux_kernver(td) >= LINUX_KERNVER(2,6,33)) {
685 		zero_pad = " 0 0 0 0\n";
686 	} else if (linux_kernver(td) >= LINUX_KERNVER(2,6,24)) {
687 		zero_pad = " 0 0 0\n";
688 	} else if (linux_kernver(td) >= LINUX_KERNVER(2,6,11)) {
689 		zero_pad = " 0 0\n";
690 	} else if (linux_kernver(td) >= LINUX_KERNVER(2,5,41)) {
691 		has_intr = false;
692 		zero_pad = " 0\n";
693 	} else {
694 		has_intr = false;
695 		zero_pad = "\n";
696 	}
697 
698 	read_cpu_time(cp_time);
699 	getboottime(&boottime);
700 	/* Parameters common to all versions */
701 	sbuf_printf(sb, "cpu %lu %lu %lu %lu",
702 	    T2J(cp_time[CP_USER]),
703 	    T2J(cp_time[CP_NICE]),
704 	    T2J(cp_time[CP_SYS]),
705 	    T2J(cp_time[CP_IDLE]));
706 
707 	/* Print interrupt stats if available */
708 	if (has_intr) {
709 		sbuf_printf(sb, " 0 %lu", T2J(cp_time[CP_INTR]));
710 	}
711 
712 	/* Pad out remaining fields depending on version */
713 	sbuf_printf(sb, "%s", zero_pad);
714 
715 	CPU_FOREACH(i) {
716 		pcpu = pcpu_find(i);
717 		cp = pcpu->pc_cp_time;
718 		sbuf_printf(sb, "cpu%d %lu %lu %lu %lu", i,
719 		    T2J(cp[CP_USER]),
720 		    T2J(cp[CP_NICE]),
721 		    T2J(cp[CP_SYS]),
722 		    T2J(cp[CP_IDLE]));
723 
724 		if (has_intr) {
725 			sbuf_printf(sb, " 0 %lu", T2J(cp[CP_INTR]));
726 		}
727 
728 		sbuf_printf(sb, "%s", zero_pad);
729 	}
730 	sbuf_printf(sb,
731 	    "disk 0 0 0 0\n"
732 	    "page %ju %ju\n"
733 	    "swap %ju %ju\n"
734 	    "intr %ju\n"
735 	    "ctxt %ju\n"
736 	    "btime %lld\n",
737 	    (uintmax_t)VM_CNT_FETCH(v_vnodepgsin),
738 	    (uintmax_t)VM_CNT_FETCH(v_vnodepgsout),
739 	    (uintmax_t)VM_CNT_FETCH(v_swappgsin),
740 	    (uintmax_t)VM_CNT_FETCH(v_swappgsout),
741 	    (uintmax_t)VM_CNT_FETCH(v_intr),
742 	    (uintmax_t)VM_CNT_FETCH(v_swtch),
743 	    (long long)boottime.tv_sec);
744 	return (0);
745 }
746 
747 static int
748 linprocfs_doswaps(PFS_FILL_ARGS)
749 {
750 	struct xswdev xsw;
751 	uintmax_t total, used;
752 	int n;
753 	char devname[SPECNAMELEN + 1];
754 
755 	sbuf_printf(sb, "Filename\t\t\t\tType\t\tSize\tUsed\tPriority\n");
756 	for (n = 0; ; n++) {
757 		if (swap_dev_info(n, &xsw, devname, sizeof(devname)) != 0)
758 			break;
759 		total = (uintmax_t)xsw.xsw_nblks * PAGE_SIZE / 1024;
760 		used  = (uintmax_t)xsw.xsw_used * PAGE_SIZE / 1024;
761 
762 		/*
763 		 * The space and not tab after the device name is on
764 		 * purpose.  Linux does so.
765 		 */
766 		sbuf_printf(sb, "/dev/%-34s unknown\t\t%jd\t%jd\t-1\n",
767 		    devname, total, used);
768 	}
769 	return (0);
770 }
771 
772 /*
773  * Filler function for proc/uptime
774  */
775 static int
776 linprocfs_douptime(PFS_FILL_ARGS)
777 {
778 	long cp_time[CPUSTATES];
779 	struct timeval tv;
780 
781 	getmicrouptime(&tv);
782 	read_cpu_time(cp_time);
783 	sbuf_printf(sb, "%lld.%02ld %ld.%02lu\n",
784 	    (long long)tv.tv_sec, tv.tv_usec / 10000,
785 	    T2S(cp_time[CP_IDLE] / mp_ncpus),
786 	    T2CS(cp_time[CP_IDLE] / mp_ncpus) % 100);
787 	return (0);
788 }
789 
790 /*
791  * Get OS build date
792  */
793 static void
794 linprocfs_osbuild(struct thread *td, struct sbuf *sb)
795 {
796 #if 0
797 	char osbuild[256];
798 	char *cp1, *cp2;
799 
800 	strncpy(osbuild, version, 256);
801 	osbuild[255] = '\0';
802 	cp1 = strstr(osbuild, "\n");
803 	cp2 = strstr(osbuild, ":");
804 	if (cp1 && cp2) {
805 		*cp1 = *cp2 = '\0';
806 		cp1 = strstr(osbuild, "#");
807 	} else
808 		cp1 = NULL;
809 	if (cp1)
810 		sbuf_printf(sb, "%s%s", cp1, cp2 + 1);
811 	else
812 #endif
813 		sbuf_cat(sb, "#4 Sun Dec 18 04:30:00 CET 1977");
814 }
815 
816 /*
817  * Get OS builder
818  */
819 static void
820 linprocfs_osbuilder(struct thread *td, struct sbuf *sb)
821 {
822 #if 0
823 	char builder[256];
824 	char *cp;
825 
826 	cp = strstr(version, "\n    ");
827 	if (cp) {
828 		strncpy(builder, cp + 5, 256);
829 		builder[255] = '\0';
830 		cp = strstr(builder, ":");
831 		if (cp)
832 			*cp = '\0';
833 	}
834 	if (cp)
835 		sbuf_cat(sb, builder);
836 	else
837 #endif
838 		sbuf_cat(sb, "des@freebsd.org");
839 }
840 
841 /*
842  * Filler function for proc/version
843  */
844 static int
845 linprocfs_doversion(PFS_FILL_ARGS)
846 {
847 	char osname[LINUX_MAX_UTSNAME];
848 	char osrelease[LINUX_MAX_UTSNAME];
849 
850 	linux_get_osname(td, osname);
851 	linux_get_osrelease(td, osrelease);
852 	sbuf_printf(sb, "%s version %s (", osname, osrelease);
853 	linprocfs_osbuilder(td, sb);
854 	sbuf_cat(sb, ") (gcc version " __VERSION__ ") ");
855 	linprocfs_osbuild(td, sb);
856 	sbuf_cat(sb, "\n");
857 
858 	return (0);
859 }
860 
861 /*
862  * Filler function for proc/loadavg
863  */
864 static int
865 linprocfs_doloadavg(PFS_FILL_ARGS)
866 {
867 
868 	sbuf_printf(sb,
869 	    "%d.%02d %d.%02d %d.%02d %d/%d %d\n",
870 	    (int)(averunnable.ldavg[0] / averunnable.fscale),
871 	    (int)(averunnable.ldavg[0] * 100 / averunnable.fscale % 100),
872 	    (int)(averunnable.ldavg[1] / averunnable.fscale),
873 	    (int)(averunnable.ldavg[1] * 100 / averunnable.fscale % 100),
874 	    (int)(averunnable.ldavg[2] / averunnable.fscale),
875 	    (int)(averunnable.ldavg[2] * 100 / averunnable.fscale % 100),
876 	    1,				/* number of running tasks */
877 	    nprocs,			/* number of tasks */
878 	    lastpid			/* the last pid */
879 	);
880 	return (0);
881 }
882 
883 static int
884 linprocfs_get_tty_nr(struct proc *p)
885 {
886 	struct session *sp;
887 	const char *ttyname;
888 	int error, major, minor, nr;
889 
890 	PROC_LOCK_ASSERT(p, MA_OWNED);
891 	sx_assert(&proctree_lock, SX_LOCKED);
892 
893 	if ((p->p_flag & P_CONTROLT) == 0)
894 		return (-1);
895 
896 	sp = p->p_pgrp->pg_session;
897 	if (sp == NULL)
898 		return (-1);
899 
900 	ttyname = devtoname(sp->s_ttyp->t_dev);
901 	error = linux_driver_get_major_minor(ttyname, &major, &minor);
902 	if (error != 0)
903 		return (-1);
904 
905 	nr = makedev(major, minor);
906 	return (nr);
907 }
908 
909 /*
910  * Filler function for proc/pid/stat
911  */
912 static int
913 linprocfs_doprocstat(PFS_FILL_ARGS)
914 {
915 	struct kinfo_proc kp;
916 	struct timeval boottime;
917 	char state;
918 	static int ratelimit = 0;
919 	int tty_nr;
920 	vm_offset_t startcode, startdata;
921 
922 	getboottime(&boottime);
923 	sx_slock(&proctree_lock);
924 	PROC_LOCK(p);
925 	fill_kinfo_proc(p, &kp);
926 	tty_nr = linprocfs_get_tty_nr(p);
927 	sx_sunlock(&proctree_lock);
928 	if (p->p_vmspace) {
929 	   startcode = (vm_offset_t)p->p_vmspace->vm_taddr;
930 	   startdata = (vm_offset_t)p->p_vmspace->vm_daddr;
931 	} else {
932 	   startcode = 0;
933 	   startdata = 0;
934 	}
935 	sbuf_printf(sb, "%d", p->p_pid);
936 #define PS_ADD(name, fmt, arg) sbuf_printf(sb, " " fmt, arg)
937 	PS_ADD("comm",		"(%s)",	p->p_comm);
938 	if (kp.ki_stat > sizeof(linux_state)) {
939 		state = 'R';
940 
941 		if (ratelimit == 0) {
942 			printf("linprocfs: don't know how to handle unknown FreeBSD state %d/%zd, mapping to R\n",
943 			    kp.ki_stat, sizeof(linux_state));
944 			++ratelimit;
945 		}
946 	} else
947 		state = linux_state[kp.ki_stat - 1];
948 	PS_ADD("state",		"%c",	state);
949 	PS_ADD("ppid",		"%d",	p->p_pptr ? p->p_pptr->p_pid : 0);
950 	PS_ADD("pgrp",		"%d",	p->p_pgid);
951 	PS_ADD("session",	"%d",	p->p_session->s_sid);
952 	PROC_UNLOCK(p);
953 	PS_ADD("tty",		"%d",	tty_nr);
954 	PS_ADD("tpgid",		"%d",	kp.ki_tpgid);
955 	PS_ADD("flags",		"%u",	0); /* XXX */
956 	PS_ADD("minflt",	"%lu",	kp.ki_rusage.ru_minflt);
957 	PS_ADD("cminflt",	"%lu",	kp.ki_rusage_ch.ru_minflt);
958 	PS_ADD("majflt",	"%lu",	kp.ki_rusage.ru_majflt);
959 	PS_ADD("cmajflt",	"%lu",	kp.ki_rusage_ch.ru_majflt);
960 	PS_ADD("utime",		"%ld",	TV2J(&kp.ki_rusage.ru_utime));
961 	PS_ADD("stime",		"%ld",	TV2J(&kp.ki_rusage.ru_stime));
962 	PS_ADD("cutime",	"%ld",	TV2J(&kp.ki_rusage_ch.ru_utime));
963 	PS_ADD("cstime",	"%ld",	TV2J(&kp.ki_rusage_ch.ru_stime));
964 	PS_ADD("priority",	"%d",	kp.ki_pri.pri_user);
965 	PS_ADD("nice",		"%d",	kp.ki_nice); /* 19 (nicest) to -19 */
966 	PS_ADD("0",		"%d",	0); /* removed field */
967 	PS_ADD("itrealvalue",	"%d",	0); /* XXX */
968 	PS_ADD("starttime",	"%lu",	TV2J(&kp.ki_start) - TV2J(&boottime));
969 	PS_ADD("vsize",		"%ju",	P2K((uintmax_t)kp.ki_size));
970 	PS_ADD("rss",		"%ju",	(uintmax_t)kp.ki_rssize);
971 	PS_ADD("rlim",		"%lu",	kp.ki_rusage.ru_maxrss);
972 	PS_ADD("startcode",	"%ju",	(uintmax_t)startcode);
973 	PS_ADD("endcode",	"%ju",	(uintmax_t)startdata);
974 	PS_ADD("startstack",	"%u",	0); /* XXX */
975 	PS_ADD("kstkesp",	"%u",	0); /* XXX */
976 	PS_ADD("kstkeip",	"%u",	0); /* XXX */
977 	PS_ADD("signal",	"%u",	0); /* XXX */
978 	PS_ADD("blocked",	"%u",	0); /* XXX */
979 	PS_ADD("sigignore",	"%u",	0); /* XXX */
980 	PS_ADD("sigcatch",	"%u",	0); /* XXX */
981 	PS_ADD("wchan",		"%u",	0); /* XXX */
982 	PS_ADD("nswap",		"%lu",	kp.ki_rusage.ru_nswap);
983 	PS_ADD("cnswap",	"%lu",	kp.ki_rusage_ch.ru_nswap);
984 	PS_ADD("exitsignal",	"%d",	0); /* XXX */
985 	PS_ADD("processor",	"%u",	kp.ki_lastcpu);
986 	PS_ADD("rt_priority",	"%u",	0); /* XXX */ /* >= 2.5.19 */
987 	PS_ADD("policy",	"%u",	kp.ki_pri.pri_class); /* >= 2.5.19 */
988 #undef PS_ADD
989 	sbuf_putc(sb, '\n');
990 
991 	return (0);
992 }
993 
994 /*
995  * Filler function for proc/pid/statm
996  */
997 static int
998 linprocfs_doprocstatm(PFS_FILL_ARGS)
999 {
1000 	struct kinfo_proc kp;
1001 	segsz_t lsize;
1002 
1003 	sx_slock(&proctree_lock);
1004 	PROC_LOCK(p);
1005 	fill_kinfo_proc(p, &kp);
1006 	PROC_UNLOCK(p);
1007 	sx_sunlock(&proctree_lock);
1008 
1009 	/*
1010 	 * See comments in linprocfs_doprocstatus() regarding the
1011 	 * computation of lsize.
1012 	 */
1013 	/* size resident share trs drs lrs dt */
1014 	sbuf_printf(sb, "%ju ", B2P((uintmax_t)kp.ki_size));
1015 	sbuf_printf(sb, "%ju ", (uintmax_t)kp.ki_rssize);
1016 	sbuf_printf(sb, "%ju ", (uintmax_t)0); /* XXX */
1017 	sbuf_printf(sb, "%ju ",	(uintmax_t)kp.ki_tsize);
1018 	sbuf_printf(sb, "%ju ", (uintmax_t)(kp.ki_dsize + kp.ki_ssize));
1019 	lsize = B2P(kp.ki_size) - kp.ki_dsize -
1020 	    kp.ki_ssize - kp.ki_tsize - 1;
1021 	sbuf_printf(sb, "%ju ", (uintmax_t)lsize);
1022 	sbuf_printf(sb, "%ju\n", (uintmax_t)0); /* XXX */
1023 
1024 	return (0);
1025 }
1026 
1027 /*
1028  * Filler function for proc/pid/status
1029  */
1030 static int
1031 linprocfs_doprocstatus(PFS_FILL_ARGS)
1032 {
1033 	struct kinfo_proc kp;
1034 	char *state;
1035 	segsz_t lsize;
1036 	struct thread *td2;
1037 	struct sigacts *ps;
1038 	l_sigset_t siglist, sigignore, sigcatch;
1039 	int i;
1040 
1041 	sx_slock(&proctree_lock);
1042 	PROC_LOCK(p);
1043 	td2 = FIRST_THREAD_IN_PROC(p); /* XXXKSE pretend only one thread */
1044 
1045 	if (P_SHOULDSTOP(p)) {
1046 		state = "T (stopped)";
1047 	} else {
1048 		switch(p->p_state) {
1049 		case PRS_NEW:
1050 			state = "I (idle)";
1051 			break;
1052 		case PRS_NORMAL:
1053 			if (p->p_flag & P_WEXIT) {
1054 				state = "X (exiting)";
1055 				break;
1056 			}
1057 			switch(TD_GET_STATE(td2)) {
1058 			case TDS_INHIBITED:
1059 				state = "S (sleeping)";
1060 				break;
1061 			case TDS_RUNQ:
1062 			case TDS_RUNNING:
1063 				state = "R (running)";
1064 				break;
1065 			default:
1066 				state = "? (unknown)";
1067 				break;
1068 			}
1069 			break;
1070 		case PRS_ZOMBIE:
1071 			state = "Z (zombie)";
1072 			break;
1073 		default:
1074 			state = "? (unknown)";
1075 			break;
1076 		}
1077 	}
1078 
1079 	fill_kinfo_proc(p, &kp);
1080 	sx_sunlock(&proctree_lock);
1081 
1082 	sbuf_printf(sb, "Name:\t%s\n",		p->p_comm); /* XXX escape */
1083 	sbuf_printf(sb, "State:\t%s\n",		state);
1084 
1085 	/*
1086 	 * Credentials
1087 	 */
1088 	sbuf_printf(sb, "Tgid:\t%d\n",		p->p_pid);
1089 	sbuf_printf(sb, "Pid:\t%d\n",		p->p_pid);
1090 	sbuf_printf(sb, "PPid:\t%d\n",		kp.ki_ppid );
1091 	sbuf_printf(sb, "TracerPid:\t%d\n",	kp.ki_tracer );
1092 	sbuf_printf(sb, "Uid:\t%d\t%d\t%d\t%d\n", p->p_ucred->cr_ruid,
1093 						p->p_ucred->cr_uid,
1094 						p->p_ucred->cr_svuid,
1095 						/* FreeBSD doesn't have fsuid */
1096 						p->p_ucred->cr_uid);
1097 	sbuf_printf(sb, "Gid:\t%d\t%d\t%d\t%d\n", p->p_ucred->cr_rgid,
1098 						p->p_ucred->cr_gid,
1099 						p->p_ucred->cr_svgid,
1100 						/* FreeBSD doesn't have fsgid */
1101 						p->p_ucred->cr_gid);
1102 	sbuf_cat(sb, "Groups:\t");
1103 	for (i = 0; i < p->p_ucred->cr_ngroups; i++)
1104 		sbuf_printf(sb, "%d ",		p->p_ucred->cr_groups[i]);
1105 	PROC_UNLOCK(p);
1106 	sbuf_putc(sb, '\n');
1107 
1108 	/*
1109 	 * Memory
1110 	 *
1111 	 * While our approximation of VmLib may not be accurate (I
1112 	 * don't know of a simple way to verify it, and I'm not sure
1113 	 * it has much meaning anyway), I believe it's good enough.
1114 	 *
1115 	 * The same code that could (I think) accurately compute VmLib
1116 	 * could also compute VmLck, but I don't really care enough to
1117 	 * implement it. Submissions are welcome.
1118 	 */
1119 	sbuf_printf(sb, "VmSize:\t%8ju kB\n",	B2K((uintmax_t)kp.ki_size));
1120 	sbuf_printf(sb, "VmLck:\t%8u kB\n",	P2K(0)); /* XXX */
1121 	sbuf_printf(sb, "VmRSS:\t%8ju kB\n",	P2K((uintmax_t)kp.ki_rssize));
1122 	sbuf_printf(sb, "VmData:\t%8ju kB\n",	P2K((uintmax_t)kp.ki_dsize));
1123 	sbuf_printf(sb, "VmStk:\t%8ju kB\n",	P2K((uintmax_t)kp.ki_ssize));
1124 	sbuf_printf(sb, "VmExe:\t%8ju kB\n",	P2K((uintmax_t)kp.ki_tsize));
1125 	lsize = B2P(kp.ki_size) - kp.ki_dsize -
1126 	    kp.ki_ssize - kp.ki_tsize - 1;
1127 	sbuf_printf(sb, "VmLib:\t%8ju kB\n",	P2K((uintmax_t)lsize));
1128 
1129 	/*
1130 	 * Signal masks
1131 	 */
1132 	PROC_LOCK(p);
1133 	bsd_to_linux_sigset(&p->p_siglist, &siglist);
1134 	ps = p->p_sigacts;
1135 	mtx_lock(&ps->ps_mtx);
1136 	bsd_to_linux_sigset(&ps->ps_sigignore, &sigignore);
1137 	bsd_to_linux_sigset(&ps->ps_sigcatch, &sigcatch);
1138 	mtx_unlock(&ps->ps_mtx);
1139 	PROC_UNLOCK(p);
1140 
1141 	sbuf_printf(sb, "SigPnd:\t%016jx\n",	siglist.__mask);
1142 	/*
1143 	 * XXX. SigBlk - target thread's signal mask, td_sigmask.
1144 	 * To implement SigBlk pseudofs should support proc/tid dir entries.
1145 	 */
1146 	sbuf_printf(sb, "SigBlk:\t%016x\n",	0);
1147 	sbuf_printf(sb, "SigIgn:\t%016jx\n",	sigignore.__mask);
1148 	sbuf_printf(sb, "SigCgt:\t%016jx\n",	sigcatch.__mask);
1149 
1150 	/*
1151 	 * Linux also prints the capability masks, but we don't have
1152 	 * capabilities yet, and when we do get them they're likely to
1153 	 * be meaningless to Linux programs, so we lie. XXX
1154 	 */
1155 	sbuf_printf(sb, "CapInh:\t%016x\n",	0);
1156 	sbuf_printf(sb, "CapPrm:\t%016x\n",	0);
1157 	sbuf_printf(sb, "CapEff:\t%016x\n",	0);
1158 
1159 	return (0);
1160 }
1161 
1162 /*
1163  * Filler function for proc/pid/cwd
1164  */
1165 static int
1166 linprocfs_doproccwd(PFS_FILL_ARGS)
1167 {
1168 	struct pwd *pwd;
1169 	char *fullpath = "unknown";
1170 	char *freepath = NULL;
1171 
1172 	pwd = pwd_hold_proc(p);
1173 	vn_fullpath(pwd->pwd_cdir, &fullpath, &freepath);
1174 	sbuf_printf(sb, "%s", fullpath);
1175 	if (freepath)
1176 		free(freepath, M_TEMP);
1177 	pwd_drop(pwd);
1178 	return (0);
1179 }
1180 
1181 /*
1182  * Filler function for proc/pid/root
1183  */
1184 static int
1185 linprocfs_doprocroot(PFS_FILL_ARGS)
1186 {
1187 	struct pwd *pwd;
1188 	struct vnode *vp;
1189 	char *fullpath = "unknown";
1190 	char *freepath = NULL;
1191 
1192 	pwd = pwd_hold_proc(p);
1193 	vp = jailed(p->p_ucred) ? pwd->pwd_jdir : pwd->pwd_rdir;
1194 	vn_fullpath(vp, &fullpath, &freepath);
1195 	sbuf_printf(sb, "%s", fullpath);
1196 	if (freepath)
1197 		free(freepath, M_TEMP);
1198 	pwd_drop(pwd);
1199 	return (0);
1200 }
1201 
1202 /*
1203  * Filler function for proc/pid/cmdline
1204  */
1205 static int
1206 linprocfs_doproccmdline(PFS_FILL_ARGS)
1207 {
1208 	int ret;
1209 
1210 	PROC_LOCK(p);
1211 	if ((ret = p_cansee(td, p)) != 0) {
1212 		PROC_UNLOCK(p);
1213 		return (ret);
1214 	}
1215 
1216 	/*
1217 	 * Mimic linux behavior and pass only processes with usermode
1218 	 * address space as valid.  Return zero silently otherwize.
1219 	 */
1220 	if (p->p_vmspace == &vmspace0) {
1221 		PROC_UNLOCK(p);
1222 		return (0);
1223 	}
1224 	if (p->p_args != NULL) {
1225 		sbuf_bcpy(sb, p->p_args->ar_args, p->p_args->ar_length);
1226 		PROC_UNLOCK(p);
1227 		return (0);
1228 	}
1229 
1230 	if ((p->p_flag & P_SYSTEM) != 0) {
1231 		PROC_UNLOCK(p);
1232 		return (0);
1233 	}
1234 
1235 	PROC_UNLOCK(p);
1236 
1237 	ret = proc_getargv(td, p, sb);
1238 	return (ret);
1239 }
1240 
1241 /*
1242  * Filler function for proc/pid/environ
1243  */
1244 static int
1245 linprocfs_doprocenviron(PFS_FILL_ARGS)
1246 {
1247 
1248 	/*
1249 	 * Mimic linux behavior and pass only processes with usermode
1250 	 * address space as valid.  Return zero silently otherwize.
1251 	 */
1252 	if (p->p_vmspace == &vmspace0)
1253 		return (0);
1254 
1255 	return (proc_getenvv(td, p, sb));
1256 }
1257 
1258 static char l32_map_str[] = "%08lx-%08lx %s%s%s%s %08lx %02x:%02x %lu%s%s\n";
1259 static char l64_map_str[] = "%016lx-%016lx %s%s%s%s %08lx %02x:%02x %lu%s%s\n";
1260 static char vdso_str[] = "      [vdso]";
1261 static char stack_str[] = "      [stack]";
1262 
1263 /*
1264  * Filler function for proc/pid/maps
1265  */
1266 static int
1267 linprocfs_doprocmaps(PFS_FILL_ARGS)
1268 {
1269 	struct vmspace *vm;
1270 	vm_map_t map;
1271 	vm_map_entry_t entry, tmp_entry;
1272 	vm_object_t obj, tobj, lobj;
1273 	vm_offset_t e_start, e_end;
1274 	vm_ooffset_t off;
1275 	vm_prot_t e_prot;
1276 	unsigned int last_timestamp;
1277 	char *name = "", *freename = NULL;
1278 	const char *l_map_str;
1279 	ino_t ino;
1280 	int error;
1281 	struct vnode *vp;
1282 	struct vattr vat;
1283 	bool private;
1284 
1285 	PROC_LOCK(p);
1286 	error = p_candebug(td, p);
1287 	PROC_UNLOCK(p);
1288 	if (error)
1289 		return (error);
1290 
1291 	if (uio->uio_rw != UIO_READ)
1292 		return (EOPNOTSUPP);
1293 
1294 	error = 0;
1295 	vm = vmspace_acquire_ref(p);
1296 	if (vm == NULL)
1297 		return (ESRCH);
1298 
1299 	if (SV_CURPROC_FLAG(SV_LP64))
1300 		l_map_str = l64_map_str;
1301 	else
1302 		l_map_str = l32_map_str;
1303 	map = &vm->vm_map;
1304 	vm_map_lock_read(map);
1305 	VM_MAP_ENTRY_FOREACH(entry, map) {
1306 		name = "";
1307 		freename = NULL;
1308 		if (entry->eflags & MAP_ENTRY_IS_SUB_MAP)
1309 			continue;
1310 		e_prot = entry->protection;
1311 		e_start = entry->start;
1312 		e_end = entry->end;
1313 		obj = entry->object.vm_object;
1314 		off = entry->offset;
1315 		for (lobj = tobj = obj; tobj != NULL;
1316 		    lobj = tobj, tobj = tobj->backing_object) {
1317 			VM_OBJECT_RLOCK(tobj);
1318 			off += lobj->backing_object_offset;
1319 			if (lobj != obj)
1320 				VM_OBJECT_RUNLOCK(lobj);
1321 		}
1322 		private = (entry->eflags & MAP_ENTRY_COW) != 0 || obj == NULL ||
1323 		    (obj->flags & OBJ_ANON) != 0;
1324 		last_timestamp = map->timestamp;
1325 		vm_map_unlock_read(map);
1326 		ino = 0;
1327 		if (lobj) {
1328 			vp = vm_object_vnode(lobj);
1329 			if (vp != NULL)
1330 				vref(vp);
1331 			if (lobj != obj)
1332 				VM_OBJECT_RUNLOCK(lobj);
1333 			VM_OBJECT_RUNLOCK(obj);
1334 			if (vp != NULL) {
1335 				vn_fullpath(vp, &name, &freename);
1336 				vn_lock(vp, LK_SHARED | LK_RETRY);
1337 				VOP_GETATTR(vp, &vat, td->td_ucred);
1338 				ino = vat.va_fileid;
1339 				vput(vp);
1340 			} else if (SV_PROC_ABI(p) == SV_ABI_LINUX) {
1341 				/*
1342 				 * sv_shared_page_base pointed out to the
1343 				 * FreeBSD sharedpage, PAGE_SIZE is a size
1344 				 * of it. The vDSO page is above.
1345 				 */
1346 				if (e_start == p->p_sysent->sv_shared_page_base +
1347 				    PAGE_SIZE)
1348 					name = vdso_str;
1349 				if (e_end == p->p_sysent->sv_usrstack)
1350 					name = stack_str;
1351 			}
1352 		}
1353 
1354 		/*
1355 		 * format:
1356 		 *  start, end, access, offset, major, minor, inode, name.
1357 		 */
1358 		error = sbuf_printf(sb, l_map_str,
1359 		    (u_long)e_start, (u_long)e_end,
1360 		    (e_prot & VM_PROT_READ)?"r":"-",
1361 		    (e_prot & VM_PROT_WRITE)?"w":"-",
1362 		    (e_prot & VM_PROT_EXECUTE)?"x":"-",
1363 		    private ? "p" : "s",
1364 		    (u_long)off,
1365 		    0,
1366 		    0,
1367 		    (u_long)ino,
1368 		    *name ? "     " : " ",
1369 		    name
1370 		    );
1371 		if (freename)
1372 			free(freename, M_TEMP);
1373 		vm_map_lock_read(map);
1374 		if (error == -1) {
1375 			error = 0;
1376 			break;
1377 		}
1378 		if (last_timestamp != map->timestamp) {
1379 			/*
1380 			 * Look again for the entry because the map was
1381 			 * modified while it was unlocked.  Specifically,
1382 			 * the entry may have been clipped, merged, or deleted.
1383 			 */
1384 			vm_map_lookup_entry(map, e_end - 1, &tmp_entry);
1385 			entry = tmp_entry;
1386 		}
1387 	}
1388 	vm_map_unlock_read(map);
1389 	vmspace_free(vm);
1390 
1391 	return (error);
1392 }
1393 
1394 /*
1395  * Filler function for proc/pid/mem
1396  */
1397 static int
1398 linprocfs_doprocmem(PFS_FILL_ARGS)
1399 {
1400 	ssize_t resid;
1401 	int error;
1402 
1403 	resid = uio->uio_resid;
1404 	error = procfs_doprocmem(PFS_FILL_ARGNAMES);
1405 
1406 	if (uio->uio_rw == UIO_READ && resid != uio->uio_resid)
1407 		return (0);
1408 
1409 	if (error == EFAULT)
1410 		error = EIO;
1411 
1412 	return (error);
1413 }
1414 
1415 /*
1416  * Criteria for interface name translation
1417  */
1418 #define IFP_IS_ETH(ifp) (ifp->if_type == IFT_ETHER)
1419 
1420 static int
1421 linux_ifname(struct ifnet *ifp, char *buffer, size_t buflen)
1422 {
1423 	struct ifnet *ifscan;
1424 	int ethno;
1425 
1426 	IFNET_RLOCK_ASSERT();
1427 
1428 	/* Short-circuit non ethernet interfaces */
1429 	if (!IFP_IS_ETH(ifp))
1430 		return (strlcpy(buffer, ifp->if_xname, buflen));
1431 
1432 	/* Determine the (relative) unit number for ethernet interfaces */
1433 	ethno = 0;
1434 	CK_STAILQ_FOREACH(ifscan, &V_ifnet, if_link) {
1435 		if (ifscan == ifp)
1436 			return (snprintf(buffer, buflen, "eth%d", ethno));
1437 		if (IFP_IS_ETH(ifscan))
1438 			ethno++;
1439 	}
1440 
1441 	return (0);
1442 }
1443 
1444 /*
1445  * Filler function for proc/net/dev
1446  */
1447 static int
1448 linprocfs_donetdev(PFS_FILL_ARGS)
1449 {
1450 	char ifname[16]; /* XXX LINUX_IFNAMSIZ */
1451 	struct ifnet *ifp;
1452 
1453 	sbuf_printf(sb, "%6s|%58s|%s\n"
1454 	    "%6s|%58s|%58s\n",
1455 	    "Inter-", "   Receive", "  Transmit",
1456 	    " face",
1457 	    "bytes    packets errs drop fifo frame compressed multicast",
1458 	    "bytes    packets errs drop fifo colls carrier compressed");
1459 
1460 	CURVNET_SET(TD_TO_VNET(curthread));
1461 	IFNET_RLOCK();
1462 	CK_STAILQ_FOREACH(ifp, &V_ifnet, if_link) {
1463 		linux_ifname(ifp, ifname, sizeof ifname);
1464 		sbuf_printf(sb, "%6.6s: ", ifname);
1465 		sbuf_printf(sb, "%7ju %7ju %4ju %4ju %4lu %5lu %10lu %9ju ",
1466 		    (uintmax_t )ifp->if_get_counter(ifp, IFCOUNTER_IBYTES),
1467 		    (uintmax_t )ifp->if_get_counter(ifp, IFCOUNTER_IPACKETS),
1468 		    (uintmax_t )ifp->if_get_counter(ifp, IFCOUNTER_IERRORS),
1469 		    (uintmax_t )ifp->if_get_counter(ifp, IFCOUNTER_IQDROPS),
1470 							/* rx_missed_errors */
1471 		    0UL,				/* rx_fifo_errors */
1472 		    0UL,				/* rx_length_errors +
1473 							 * rx_over_errors +
1474 							 * rx_crc_errors +
1475 							 * rx_frame_errors */
1476 		    0UL,				/* rx_compressed */
1477 		    (uintmax_t )ifp->if_get_counter(ifp, IFCOUNTER_IMCASTS));
1478 							/* XXX-BZ rx only? */
1479 		sbuf_printf(sb, "%8ju %7ju %4ju %4ju %4lu %5ju %7lu %10lu\n",
1480 		    (uintmax_t )ifp->if_get_counter(ifp, IFCOUNTER_OBYTES),
1481 		    (uintmax_t )ifp->if_get_counter(ifp, IFCOUNTER_OPACKETS),
1482 		    (uintmax_t )ifp->if_get_counter(ifp, IFCOUNTER_OERRORS),
1483 		    (uintmax_t )ifp->if_get_counter(ifp, IFCOUNTER_OQDROPS),
1484 		    0UL,				/* tx_fifo_errors */
1485 		    (uintmax_t )ifp->if_get_counter(ifp, IFCOUNTER_COLLISIONS),
1486 		    0UL,				/* tx_carrier_errors +
1487 							 * tx_aborted_errors +
1488 							 * tx_window_errors +
1489 							 * tx_heartbeat_errors*/
1490 		    0UL);				/* tx_compressed */
1491 	}
1492 	IFNET_RUNLOCK();
1493 	CURVNET_RESTORE();
1494 
1495 	return (0);
1496 }
1497 
1498 /*
1499  * Filler function for proc/sys/kernel/osrelease
1500  */
1501 static int
1502 linprocfs_doosrelease(PFS_FILL_ARGS)
1503 {
1504 	char osrelease[LINUX_MAX_UTSNAME];
1505 
1506 	linux_get_osrelease(td, osrelease);
1507 	sbuf_printf(sb, "%s\n", osrelease);
1508 
1509 	return (0);
1510 }
1511 
1512 /*
1513  * Filler function for proc/sys/kernel/ostype
1514  */
1515 static int
1516 linprocfs_doostype(PFS_FILL_ARGS)
1517 {
1518 	char osname[LINUX_MAX_UTSNAME];
1519 
1520 	linux_get_osname(td, osname);
1521 	sbuf_printf(sb, "%s\n", osname);
1522 
1523 	return (0);
1524 }
1525 
1526 /*
1527  * Filler function for proc/sys/kernel/version
1528  */
1529 static int
1530 linprocfs_doosbuild(PFS_FILL_ARGS)
1531 {
1532 
1533 	linprocfs_osbuild(td, sb);
1534 	sbuf_cat(sb, "\n");
1535 	return (0);
1536 }
1537 
1538 /*
1539  * Filler function for proc/sys/kernel/msgmax
1540  */
1541 static int
1542 linprocfs_domsgmax(PFS_FILL_ARGS)
1543 {
1544 
1545 	sbuf_printf(sb, "%d\n", msginfo.msgmax);
1546 	return (0);
1547 }
1548 
1549 /*
1550  * Filler function for proc/sys/kernel/msgmni
1551  */
1552 static int
1553 linprocfs_domsgmni(PFS_FILL_ARGS)
1554 {
1555 
1556 	sbuf_printf(sb, "%d\n", msginfo.msgmni);
1557 	return (0);
1558 }
1559 
1560 /*
1561  * Filler function for proc/sys/kernel/msgmnb
1562  */
1563 static int
1564 linprocfs_domsgmnb(PFS_FILL_ARGS)
1565 {
1566 
1567 	sbuf_printf(sb, "%d\n", msginfo.msgmnb);
1568 	return (0);
1569 }
1570 
1571 /*
1572  * Filler function for proc/sys/kernel/ngroups_max
1573  *
1574  * Note that in Linux it defaults to 65536, not 1023.
1575  */
1576 static int
1577 linprocfs_dongroups_max(PFS_FILL_ARGS)
1578 {
1579 
1580 	sbuf_printf(sb, "%d\n", ngroups_max);
1581 	return (0);
1582 }
1583 
1584 /*
1585  * Filler function for proc/sys/kernel/pid_max
1586  */
1587 static int
1588 linprocfs_dopid_max(PFS_FILL_ARGS)
1589 {
1590 
1591 	sbuf_printf(sb, "%i\n", PID_MAX);
1592 	return (0);
1593 }
1594 
1595 /*
1596  * Filler function for proc/sys/kernel/sem
1597  */
1598 static int
1599 linprocfs_dosem(PFS_FILL_ARGS)
1600 {
1601 
1602 	sbuf_printf(sb, "%d %d %d %d\n", seminfo.semmsl, seminfo.semmns,
1603 	    seminfo.semopm, seminfo.semmni);
1604 	return (0);
1605 }
1606 
1607 /*
1608  * Filler function for proc/sys/kernel/shmall
1609  */
1610 static int
1611 linprocfs_doshmall(PFS_FILL_ARGS)
1612 {
1613 
1614 	sbuf_printf(sb, "%lu\n", shminfo.shmall);
1615 	return (0);
1616 }
1617 
1618 /*
1619  * Filler function for proc/sys/kernel/shmmax
1620  */
1621 static int
1622 linprocfs_doshmmax(PFS_FILL_ARGS)
1623 {
1624 
1625 	sbuf_printf(sb, "%lu\n", shminfo.shmmax);
1626 	return (0);
1627 }
1628 
1629 /*
1630  * Filler function for proc/sys/kernel/shmmni
1631  */
1632 static int
1633 linprocfs_doshmmni(PFS_FILL_ARGS)
1634 {
1635 
1636 	sbuf_printf(sb, "%lu\n", shminfo.shmmni);
1637 	return (0);
1638 }
1639 
1640 /*
1641  * Filler function for proc/sys/kernel/tainted
1642  */
1643 static int
1644 linprocfs_dotainted(PFS_FILL_ARGS)
1645 {
1646 
1647 	sbuf_printf(sb, "0\n");
1648 	return (0);
1649 }
1650 
1651 /*
1652  * Filler function for proc/sys/vm/min_free_kbytes
1653  *
1654  * This mirrors the approach in illumos to return zero for reads. Effectively,
1655  * it says, no memory is kept in reserve for "atomic allocations". This class
1656  * of allocation can be used at times when a thread cannot be suspended.
1657  */
1658 static int
1659 linprocfs_dominfree(PFS_FILL_ARGS)
1660 {
1661 
1662 	sbuf_printf(sb, "%d\n", 0);
1663 	return (0);
1664 }
1665 
1666 /*
1667  * Filler function for proc/scsi/device_info
1668  */
1669 static int
1670 linprocfs_doscsidevinfo(PFS_FILL_ARGS)
1671 {
1672 
1673 	return (0);
1674 }
1675 
1676 /*
1677  * Filler function for proc/scsi/scsi
1678  */
1679 static int
1680 linprocfs_doscsiscsi(PFS_FILL_ARGS)
1681 {
1682 
1683 	return (0);
1684 }
1685 
1686 /*
1687  * Filler function for proc/devices
1688  */
1689 static int
1690 linprocfs_dodevices(PFS_FILL_ARGS)
1691 {
1692 	char *char_devices;
1693 	sbuf_printf(sb, "Character devices:\n");
1694 
1695 	char_devices = linux_get_char_devices();
1696 	sbuf_printf(sb, "%s", char_devices);
1697 	linux_free_get_char_devices(char_devices);
1698 
1699 	sbuf_printf(sb, "\nBlock devices:\n");
1700 
1701 	return (0);
1702 }
1703 
1704 /*
1705  * Filler function for proc/cmdline
1706  */
1707 static int
1708 linprocfs_docmdline(PFS_FILL_ARGS)
1709 {
1710 
1711 	sbuf_printf(sb, "BOOT_IMAGE=%s", kernelname);
1712 	sbuf_printf(sb, " ro root=302\n");
1713 	return (0);
1714 }
1715 
1716 /*
1717  * Filler function for proc/filesystems
1718  */
1719 static int
1720 linprocfs_dofilesystems(PFS_FILL_ARGS)
1721 {
1722 	struct vfsconf *vfsp;
1723 
1724 	vfsconf_slock();
1725 	TAILQ_FOREACH(vfsp, &vfsconf, vfc_list) {
1726 		if (vfsp->vfc_flags & VFCF_SYNTHETIC)
1727 			sbuf_printf(sb, "nodev");
1728 		sbuf_printf(sb, "\t%s\n", vfsp->vfc_name);
1729 	}
1730 	vfsconf_sunlock();
1731 	return(0);
1732 }
1733 
1734 /*
1735  * Filler function for proc/modules
1736  */
1737 static int
1738 linprocfs_domodules(PFS_FILL_ARGS)
1739 {
1740 #if 0
1741 	struct linker_file *lf;
1742 
1743 	TAILQ_FOREACH(lf, &linker_files, link) {
1744 		sbuf_printf(sb, "%-20s%8lu%4d\n", lf->filename,
1745 		    (unsigned long)lf->size, lf->refs);
1746 	}
1747 #endif
1748 	return (0);
1749 }
1750 
1751 /*
1752  * Filler function for proc/pid/fd
1753  */
1754 static int
1755 linprocfs_dofdescfs(PFS_FILL_ARGS)
1756 {
1757 
1758 	if (p == curproc)
1759 		sbuf_printf(sb, "/dev/fd");
1760 	else
1761 		sbuf_printf(sb, "unknown");
1762 	return (0);
1763 }
1764 
1765 /*
1766  * Filler function for proc/pid/limits
1767  */
1768 static const struct linux_rlimit_ident {
1769 	const char	*desc;
1770 	const char	*unit;
1771 	unsigned int	rlim_id;
1772 } linux_rlimits_ident[] = {
1773 	{ "Max cpu time",	"seconds",	RLIMIT_CPU },
1774 	{ "Max file size", 	"bytes",	RLIMIT_FSIZE },
1775 	{ "Max data size",	"bytes", 	RLIMIT_DATA },
1776 	{ "Max stack size",	"bytes", 	RLIMIT_STACK },
1777 	{ "Max core file size",  "bytes",	RLIMIT_CORE },
1778 	{ "Max resident set",	"bytes",	RLIMIT_RSS },
1779 	{ "Max processes",	"processes",	RLIMIT_NPROC },
1780 	{ "Max open files",	"files",	RLIMIT_NOFILE },
1781 	{ "Max locked memory",	"bytes",	RLIMIT_MEMLOCK },
1782 	{ "Max address space",	"bytes",	RLIMIT_AS },
1783 	{ "Max file locks",	"locks",	LINUX_RLIMIT_LOCKS },
1784 	{ "Max pending signals", "signals",	LINUX_RLIMIT_SIGPENDING },
1785 	{ "Max msgqueue size",	"bytes",	LINUX_RLIMIT_MSGQUEUE },
1786 	{ "Max nice priority", 		"",	LINUX_RLIMIT_NICE },
1787 	{ "Max realtime priority",	"",	LINUX_RLIMIT_RTPRIO },
1788 	{ "Max realtime timeout",	"us",	LINUX_RLIMIT_RTTIME },
1789 	{ 0, 0, 0 }
1790 };
1791 
1792 static int
1793 linprocfs_doproclimits(PFS_FILL_ARGS)
1794 {
1795 	const struct linux_rlimit_ident *li;
1796 	struct plimit *limp;
1797 	struct rlimit rl;
1798 	ssize_t size;
1799 	int res, error;
1800 
1801 	error = 0;
1802 
1803 	PROC_LOCK(p);
1804 	limp = lim_hold(p->p_limit);
1805 	PROC_UNLOCK(p);
1806 	size = sizeof(res);
1807 	sbuf_printf(sb, "%-26s%-21s%-21s%-21s\n", "Limit", "Soft Limit",
1808 			"Hard Limit", "Units");
1809 	for (li = linux_rlimits_ident; li->desc != NULL; ++li) {
1810 		switch (li->rlim_id)
1811 		{
1812 		case LINUX_RLIMIT_LOCKS:
1813 			/* FALLTHROUGH */
1814 		case LINUX_RLIMIT_RTTIME:
1815 			rl.rlim_cur = RLIM_INFINITY;
1816 			break;
1817 		case LINUX_RLIMIT_SIGPENDING:
1818 			error = kernel_sysctlbyname(td,
1819 			    "kern.sigqueue.max_pending_per_proc",
1820 			    &res, &size, 0, 0, 0, 0);
1821 			if (error != 0)
1822 				goto out;
1823 			rl.rlim_cur = res;
1824 			rl.rlim_max = res;
1825 			break;
1826 		case LINUX_RLIMIT_MSGQUEUE:
1827 			error = kernel_sysctlbyname(td,
1828 			    "kern.ipc.msgmnb", &res, &size, 0, 0, 0, 0);
1829 			if (error != 0)
1830 				goto out;
1831 			rl.rlim_cur = res;
1832 			rl.rlim_max = res;
1833 			break;
1834 		case LINUX_RLIMIT_NICE:
1835 			/* FALLTHROUGH */
1836 		case LINUX_RLIMIT_RTPRIO:
1837 			rl.rlim_cur = 0;
1838 			rl.rlim_max = 0;
1839 			break;
1840 		default:
1841 			rl = limp->pl_rlimit[li->rlim_id];
1842 			break;
1843 		}
1844 		if (rl.rlim_cur == RLIM_INFINITY)
1845 			sbuf_printf(sb, "%-26s%-21s%-21s%-10s\n",
1846 			    li->desc, "unlimited", "unlimited", li->unit);
1847 		else
1848 			sbuf_printf(sb, "%-26s%-21llu%-21llu%-10s\n",
1849 			    li->desc, (unsigned long long)rl.rlim_cur,
1850 			    (unsigned long long)rl.rlim_max, li->unit);
1851 	}
1852 out:
1853 	lim_free(limp);
1854 	return (error);
1855 }
1856 
1857 /*
1858  * The point of the following two functions is to work around
1859  * an assertion in Chromium; see kern/240991 for details.
1860  */
1861 static int
1862 linprocfs_dotaskattr(PFS_ATTR_ARGS)
1863 {
1864 
1865 	vap->va_nlink = 3;
1866 	return (0);
1867 }
1868 
1869 /*
1870  * Filler function for proc/<pid>/task/.dummy
1871  */
1872 static int
1873 linprocfs_dotaskdummy(PFS_FILL_ARGS)
1874 {
1875 
1876 	return (0);
1877 }
1878 
1879 /*
1880  * Filler function for proc/sys/kernel/random/uuid
1881  */
1882 static int
1883 linprocfs_douuid(PFS_FILL_ARGS)
1884 {
1885 	struct uuid uuid;
1886 
1887 	kern_uuidgen(&uuid, 1);
1888 	sbuf_printf_uuid(sb, &uuid);
1889 	sbuf_printf(sb, "\n");
1890 	return(0);
1891 }
1892 
1893 /*
1894  * Filler function for proc/pid/auxv
1895  */
1896 static int
1897 linprocfs_doauxv(PFS_FILL_ARGS)
1898 {
1899 	struct sbuf *asb;
1900 	off_t buflen, resid;
1901 	int error;
1902 
1903 	/*
1904 	 * Mimic linux behavior and pass only processes with usermode
1905 	 * address space as valid. Return zero silently otherwise.
1906 	 */
1907 	if (p->p_vmspace == &vmspace0)
1908 		return (0);
1909 
1910 	if (uio->uio_resid == 0)
1911 		return (0);
1912 	if (uio->uio_offset < 0 || uio->uio_resid < 0)
1913 		return (EINVAL);
1914 
1915 	asb = sbuf_new_auto();
1916 	if (asb == NULL)
1917 		return (ENOMEM);
1918 	error = proc_getauxv(td, p, asb);
1919 	if (error == 0)
1920 		error = sbuf_finish(asb);
1921 
1922 	resid = sbuf_len(asb) - uio->uio_offset;
1923 	if (resid > uio->uio_resid)
1924 		buflen = uio->uio_resid;
1925 	else
1926 		buflen = resid;
1927 	if (buflen > IOSIZE_MAX)
1928 		return (EINVAL);
1929 	if (buflen > maxphys)
1930 		buflen = maxphys;
1931 	if (resid <= 0)
1932 		return (0);
1933 
1934 	if (error == 0)
1935 		error = uiomove(sbuf_data(asb) + uio->uio_offset, buflen, uio);
1936 	sbuf_delete(asb);
1937 	return (error);
1938 }
1939 
1940 /*
1941  * Constructor
1942  */
1943 static int
1944 linprocfs_init(PFS_INIT_ARGS)
1945 {
1946 	struct pfs_node *root;
1947 	struct pfs_node *dir;
1948 	struct pfs_node *sys;
1949 
1950 	root = pi->pi_root;
1951 
1952 	/* /proc/... */
1953 	pfs_create_file(root, "cmdline", &linprocfs_docmdline,
1954 	    NULL, NULL, NULL, PFS_RD);
1955 	pfs_create_file(root, "cpuinfo", &linprocfs_docpuinfo,
1956 	    NULL, NULL, NULL, PFS_RD);
1957 	pfs_create_file(root, "devices", &linprocfs_dodevices,
1958 	    NULL, NULL, NULL, PFS_RD);
1959 	pfs_create_file(root, "filesystems", &linprocfs_dofilesystems,
1960 	    NULL, NULL, NULL, PFS_RD);
1961 	pfs_create_file(root, "loadavg", &linprocfs_doloadavg,
1962 	    NULL, NULL, NULL, PFS_RD);
1963 	pfs_create_file(root, "meminfo", &linprocfs_domeminfo,
1964 	    NULL, NULL, NULL, PFS_RD);
1965 	pfs_create_file(root, "modules", &linprocfs_domodules,
1966 	    NULL, NULL, NULL, PFS_RD);
1967 	pfs_create_file(root, "mounts", &linprocfs_domtab,
1968 	    NULL, NULL, NULL, PFS_RD);
1969 	pfs_create_file(root, "mtab", &linprocfs_domtab,
1970 	    NULL, NULL, NULL, PFS_RD);
1971 	pfs_create_file(root, "partitions", &linprocfs_dopartitions,
1972 	    NULL, NULL, NULL, PFS_RD);
1973 	pfs_create_link(root, "self", &procfs_docurproc,
1974 	    NULL, NULL, NULL, 0);
1975 	pfs_create_file(root, "stat", &linprocfs_dostat,
1976 	    NULL, NULL, NULL, PFS_RD);
1977 	pfs_create_file(root, "swaps", &linprocfs_doswaps,
1978 	    NULL, NULL, NULL, PFS_RD);
1979 	pfs_create_file(root, "uptime", &linprocfs_douptime,
1980 	    NULL, NULL, NULL, PFS_RD);
1981 	pfs_create_file(root, "version", &linprocfs_doversion,
1982 	    NULL, NULL, NULL, PFS_RD);
1983 
1984 	/* /proc/bus/... */
1985 	dir = pfs_create_dir(root, "bus", NULL, NULL, NULL, 0);
1986 	dir = pfs_create_dir(dir, "pci", NULL, NULL, NULL, 0);
1987 	dir = pfs_create_dir(dir, "devices", NULL, NULL, NULL, 0);
1988 
1989 	/* /proc/net/... */
1990 	dir = pfs_create_dir(root, "net", NULL, NULL, NULL, 0);
1991 	pfs_create_file(dir, "dev", &linprocfs_donetdev,
1992 	    NULL, NULL, NULL, PFS_RD);
1993 
1994 	/* /proc/<pid>/... */
1995 	dir = pfs_create_dir(root, "pid", NULL, NULL, NULL, PFS_PROCDEP);
1996 	pfs_create_file(dir, "cmdline", &linprocfs_doproccmdline,
1997 	    NULL, NULL, NULL, PFS_RD);
1998 	pfs_create_link(dir, "cwd", &linprocfs_doproccwd,
1999 	    NULL, NULL, NULL, 0);
2000 	pfs_create_file(dir, "environ", &linprocfs_doprocenviron,
2001 	    NULL, &procfs_candebug, NULL, PFS_RD);
2002 	pfs_create_link(dir, "exe", &procfs_doprocfile,
2003 	    NULL, &procfs_notsystem, NULL, 0);
2004 	pfs_create_file(dir, "maps", &linprocfs_doprocmaps,
2005 	    NULL, NULL, NULL, PFS_RD | PFS_AUTODRAIN);
2006 	pfs_create_file(dir, "mem", &linprocfs_doprocmem,
2007 	    procfs_attr_rw, &procfs_candebug, NULL, PFS_RDWR | PFS_RAW);
2008 	pfs_create_file(dir, "mountinfo", &linprocfs_doprocmountinfo,
2009 	    NULL, NULL, NULL, PFS_RD);
2010 	pfs_create_file(dir, "mounts", &linprocfs_domtab,
2011 	    NULL, NULL, NULL, PFS_RD);
2012 	pfs_create_link(dir, "root", &linprocfs_doprocroot,
2013 	    NULL, NULL, NULL, 0);
2014 	pfs_create_file(dir, "stat", &linprocfs_doprocstat,
2015 	    NULL, NULL, NULL, PFS_RD);
2016 	pfs_create_file(dir, "statm", &linprocfs_doprocstatm,
2017 	    NULL, NULL, NULL, PFS_RD);
2018 	pfs_create_file(dir, "status", &linprocfs_doprocstatus,
2019 	    NULL, NULL, NULL, PFS_RD);
2020 	pfs_create_link(dir, "fd", &linprocfs_dofdescfs,
2021 	    NULL, NULL, NULL, 0);
2022 	pfs_create_file(dir, "auxv", &linprocfs_doauxv,
2023 	    NULL, &procfs_candebug, NULL, PFS_RD|PFS_RAWRD);
2024 	pfs_create_file(dir, "limits", &linprocfs_doproclimits,
2025 	    NULL, NULL, NULL, PFS_RD);
2026 
2027 	/* /proc/<pid>/task/... */
2028 	dir = pfs_create_dir(dir, "task", linprocfs_dotaskattr, NULL, NULL, 0);
2029 	pfs_create_file(dir, ".dummy", &linprocfs_dotaskdummy,
2030 	    NULL, NULL, NULL, PFS_RD);
2031 
2032 	/* /proc/scsi/... */
2033 	dir = pfs_create_dir(root, "scsi", NULL, NULL, NULL, 0);
2034 	pfs_create_file(dir, "device_info", &linprocfs_doscsidevinfo,
2035 	    NULL, NULL, NULL, PFS_RD);
2036 	pfs_create_file(dir, "scsi", &linprocfs_doscsiscsi,
2037 	    NULL, NULL, NULL, PFS_RD);
2038 
2039 	/* /proc/sys/... */
2040 	sys = pfs_create_dir(root, "sys", NULL, NULL, NULL, 0);
2041 
2042 	/* /proc/sys/kernel/... */
2043 	dir = pfs_create_dir(sys, "kernel", NULL, NULL, NULL, 0);
2044 	pfs_create_file(dir, "osrelease", &linprocfs_doosrelease,
2045 	    NULL, NULL, NULL, PFS_RD);
2046 	pfs_create_file(dir, "ostype", &linprocfs_doostype,
2047 	    NULL, NULL, NULL, PFS_RD);
2048 	pfs_create_file(dir, "version", &linprocfs_doosbuild,
2049 	    NULL, NULL, NULL, PFS_RD);
2050 	pfs_create_file(dir, "msgmax", &linprocfs_domsgmax,
2051 	    NULL, NULL, NULL, PFS_RD);
2052 	pfs_create_file(dir, "msgmni", &linprocfs_domsgmni,
2053 	    NULL, NULL, NULL, PFS_RD);
2054 	pfs_create_file(dir, "msgmnb", &linprocfs_domsgmnb,
2055 	    NULL, NULL, NULL, PFS_RD);
2056 	pfs_create_file(dir, "ngroups_max", &linprocfs_dongroups_max,
2057 	    NULL, NULL, NULL, PFS_RD);
2058 	pfs_create_file(dir, "pid_max", &linprocfs_dopid_max,
2059 	    NULL, NULL, NULL, PFS_RD);
2060 	pfs_create_file(dir, "sem", &linprocfs_dosem,
2061 	    NULL, NULL, NULL, PFS_RD);
2062 	pfs_create_file(dir, "shmall", &linprocfs_doshmall,
2063 	    NULL, NULL, NULL, PFS_RD);
2064 	pfs_create_file(dir, "shmmax", &linprocfs_doshmmax,
2065 	    NULL, NULL, NULL, PFS_RD);
2066 	pfs_create_file(dir, "shmmni", &linprocfs_doshmmni,
2067 	    NULL, NULL, NULL, PFS_RD);
2068 	pfs_create_file(dir, "tainted", &linprocfs_dotainted,
2069 	    NULL, NULL, NULL, PFS_RD);
2070 
2071 	/* /proc/sys/kernel/random/... */
2072 	dir = pfs_create_dir(dir, "random", NULL, NULL, NULL, 0);
2073 	pfs_create_file(dir, "uuid", &linprocfs_douuid,
2074 	    NULL, NULL, NULL, PFS_RD);
2075 
2076 	/* /proc/sys/vm/.... */
2077 	dir = pfs_create_dir(sys, "vm", NULL, NULL, NULL, 0);
2078 	pfs_create_file(dir, "min_free_kbytes", &linprocfs_dominfree,
2079 	    NULL, NULL, NULL, PFS_RD);
2080 
2081 	return (0);
2082 }
2083 
2084 /*
2085  * Destructor
2086  */
2087 static int
2088 linprocfs_uninit(PFS_INIT_ARGS)
2089 {
2090 
2091 	/* nothing to do, pseudofs will GC */
2092 	return (0);
2093 }
2094 
2095 PSEUDOFS(linprocfs, 1, VFCF_JAIL);
2096 #if defined(__aarch64__) || defined(__amd64__)
2097 MODULE_DEPEND(linprocfs, linux_common, 1, 1, 1);
2098 #else
2099 MODULE_DEPEND(linprocfs, linux, 1, 1, 1);
2100 #endif
2101 MODULE_DEPEND(linprocfs, procfs, 1, 1, 1);
2102 MODULE_DEPEND(linprocfs, sysvmsg, 1, 1, 1);
2103 MODULE_DEPEND(linprocfs, sysvsem, 1, 1, 1);
2104 MODULE_DEPEND(linprocfs, sysvshm, 1, 1, 1);
2105