sys/compat/linprocfs/linprocfs.c

   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/smp.h>
  70 #include <sys/socket.h>
  71 #include <sys/syscallsubr.h>
  72 #include <sys/sysctl.h>
  73 #include <sys/sysent.h>
  74 #include <sys/systm.h>
  75 #include <sys/time.h>
  76 #include <sys/tty.h>
  77 #include <sys/user.h>
  78 #include <sys/uuid.h>
  79 #include <sys/vmmeter.h>
  80 #include <sys/vnode.h>
  81 #include <sys/bus.h>
  82
  83 #include <net/if.h>
  84 #include <net/if_var.h>
  85 #include <net/if_types.h>
  86
  87 #include <vm/vm.h>
  88 #include <vm/vm_extern.h>
  89 #include <vm/pmap.h>
  90 #include <vm/vm_map.h>
  91 #include <vm/vm_param.h>
  92 #include <vm/vm_object.h>
  93 #include <vm/swap_pager.h>
  94
  95 #include <machine/clock.h>
  96
  97 #include <geom/geom.h>
  98 #include <geom/geom_int.h>
  99
 100 #if defined(__i386__) || defined(__amd64__)
 101 #include <machine/cputypes.h>
 102 #include <machine/md_var.h>
 103 #endif /* __i386__ || __amd64__ */
 104
 105 #include <compat/linux/linux.h>
 106 #include <compat/linux/linux_mib.h>
 107 #include <compat/linux/linux_misc.h>
 108 #include <compat/linux/linux_util.h>
 109 #include <fs/pseudofs/pseudofs.h>
 110 #include <fs/procfs/procfs.h>
 111
 112 /*
 113  * Various conversion macros
 114  */
 115 #define T2J(x) ((long)(((x) * 100ULL) / (stathz ? stathz : hz)))        /* ticks to jiffies */
 116 #define T2CS(x) ((unsigned long)(((x) * 100ULL) / (stathz ? stathz : hz)))      /* ticks to centiseconds */
 117 #define T2S(x) ((x) / (stathz ? stathz : hz))           /* ticks to seconds */
 118 #define B2K(x) ((x) >> 10)                              /* bytes to kbytes */
 119 #define B2P(x) ((x) >> PAGE_SHIFT)                      /* bytes to pages */
 120 #define P2B(x) ((x) << PAGE_SHIFT)                      /* pages to bytes */
 121 #define P2K(x) ((x) << (PAGE_SHIFT - 10))               /* pages to kbytes */
 122 #define TV2J(x) ((x)->tv_sec * 100UL + (x)->tv_usec / 10000)
 123
 124 /**
 125  * @brief Mapping of ki_stat in struct kinfo_proc to the linux state
 126  *
 127  * The linux procfs state field displays one of the characters RSDZTW to
 128  * denote running, sleeping in an interruptible wait, waiting in an
 129  * uninterruptible disk sleep, a zombie process, process is being traced
 130  * or stopped, or process is paging respectively.
 131  *
 132  * Our struct kinfo_proc contains the variable ki_stat which contains a
 133  * value out of SIDL, SRUN, SSLEEP, SSTOP, SZOMB, SWAIT and SLOCK.
 134  *
 135  * This character array is used with ki_stati-1 as an index and tries to
 136  * map our states to suitable linux states.
 137  */
 138 static char linux_state[] = "RRSTZDD";
 139
 140 /*
 141  * Filler function for proc/meminfo
 142  */
 143 static int
 144 linprocfs_domeminfo(PFS_FILL_ARGS)
 145 {
 146         unsigned long memtotal;         /* total memory in bytes */
 147         unsigned long memused;          /* used memory in bytes */
 148         unsigned long memfree;          /* free memory in bytes */
 149         unsigned long buffers, cached;  /* buffer / cache memory ??? */
 150         unsigned long long swaptotal;   /* total swap space in bytes */
 151         unsigned long long swapused;    /* used swap space in bytes */
 152         unsigned long long swapfree;    /* free swap space in bytes */
 153         int i, j;
 154
 155         memtotal = physmem * PAGE_SIZE;
 156         /*
 157          * The correct thing here would be:
 158          *
 159         memfree = vm_free_count() * PAGE_SIZE;
 160         memused = memtotal - memfree;
 161          *
 162          * but it might mislead linux binaries into thinking there
 163          * is very little memory left, so we cheat and tell them that
 164          * all memory that isn't wired down is free.
 165          */
 166         memused = vm_wire_count() * PAGE_SIZE;
 167         memfree = memtotal - memused;
 168         swap_pager_status(&i, &j);
 169         swaptotal = (unsigned long long)i * PAGE_SIZE;
 170         swapused = (unsigned long long)j * PAGE_SIZE;
 171         swapfree = swaptotal - swapused;
 172         /*
 173          * We'd love to be able to write:
 174          *
 175         buffers = bufspace;
 176          *
 177          * but bufspace is internal to vfs_bio.c and we don't feel
 178          * like unstaticizing it just for linprocfs's sake.
 179          */
 180         buffers = 0;
 181         cached = vm_inactive_count() * PAGE_SIZE;
 182
 183         sbuf_printf(sb,
 184             "MemTotal: %9lu kB\n"
 185             "MemFree:  %9lu kB\n"
 186             "Buffers:  %9lu kB\n"
 187             "Cached:   %9lu kB\n"
 188             "SwapTotal:%9llu kB\n"
 189             "SwapFree: %9llu kB\n",
 190             B2K(memtotal), B2K(memfree), B2K(buffers),
 191             B2K(cached), B2K(swaptotal), B2K(swapfree));
 192
 193         return (0);
 194 }
 195
 196 #if defined(__i386__) || defined(__amd64__)
 197 /*
 198  * Filler function for proc/cpuinfo (i386 & amd64 version)
 199  */
 200 static int
 201 linprocfs_docpuinfo(PFS_FILL_ARGS)
 202 {
 203         int hw_model[2];
 204         char model[128];
 205         uint64_t freq;
 206         size_t size;
 207         u_int cache_size[4];
 208         int fqmhz, fqkhz;
 209         int i, j;
 210
 211         /*
 212          * We default the flags to include all non-conflicting flags,
 213          * and the Intel versions of conflicting flags.
 214          */
 215         static char *cpu_feature_names[] = {
 216                 /*  0 */ "fpu", "vme", "de", "pse",
 217                 /*  4 */ "tsc", "msr", "pae", "mce",
 218                 /*  8 */ "cx8", "apic", "", "sep",
 219                 /* 12 */ "mtrr", "pge", "mca", "cmov",
 220                 /* 16 */ "pat", "pse36", "pn", "clflush",
 221                 /* 20 */ "", "dts", "acpi", "mmx",
 222                 /* 24 */ "fxsr", "sse", "sse2", "ss",
 223                 /* 28 */ "ht", "tm", "ia64", "pbe"
 224         };
 225
 226         static char *amd_feature_names[] = {
 227                 /*  0 */ "", "", "", "",
 228                 /*  4 */ "", "", "", "",
 229                 /*  8 */ "", "", "", "syscall",
 230                 /* 12 */ "", "", "", "",
 231                 /* 16 */ "", "", "", "mp",
 232                 /* 20 */ "nx", "", "mmxext", "",
 233                 /* 24 */ "", "fxsr_opt", "pdpe1gb", "rdtscp",
 234                 /* 28 */ "", "lm", "3dnowext", "3dnow"
 235         };
 236
 237         static char *cpu_feature2_names[] = {
 238                 /*  0 */ "pni", "pclmulqdq", "dtes3", "monitor",
 239                 /*  4 */ "ds_cpl", "vmx", "smx", "est",
 240                 /*  8 */ "tm2", "ssse3", "cid", "sdbg",
 241                 /* 12 */ "fma", "cx16", "xptr", "pdcm",
 242                 /* 16 */ "", "pcid", "dca", "sse4_1",
 243                 /* 20 */ "sse4_2", "x2apic", "movbe", "popcnt",
 244                 /* 24 */ "tsc_deadline_timer", "aes", "xsave", "",
 245                 /* 28 */ "avx", "f16c", "rdrand", "hypervisor"
 246         };
 247
 248         static char *amd_feature2_names[] = {
 249                 /*  0 */ "lahf_lm", "cmp_legacy", "svm", "extapic",
 250                 /*  4 */ "cr8_legacy", "abm", "sse4a", "misalignsse",
 251                 /*  8 */ "3dnowprefetch", "osvw", "ibs", "xop",
 252                 /* 12 */ "skinit", "wdt", "", "lwp",
 253                 /* 16 */ "fma4", "tce", "", "nodeid_msr",
 254                 /* 20 */ "", "tbm", "topoext", "perfctr_core",
 255                 /* 24 */ "perfctr_nb", "", "bpext", "ptsc",
 256                 /* 28 */ "perfctr_llc", "mwaitx", "", ""
 257         };
 258
 259         static char *cpu_stdext_feature_names[] = {
 260                 /*  0 */ "fsgsbase", "tsc_adjust", "", "bmi1",
 261                 /*  4 */ "hle", "avx2", "", "smep",
 262                 /*  8 */ "bmi2", "erms", "invpcid", "rtm",
 263                 /* 12 */ "cqm", "", "mpx", "rdt_a",
 264                 /* 16 */ "avx512f", "avx512dq", "rdseed", "adx",
 265                 /* 20 */ "smap", "avx512ifma", "", "clflushopt",
 266                 /* 24 */ "clwb", "intel_pt", "avx512pf", "avx512er",
 267                 /* 28 */ "avx512cd", "sha_ni", "avx512bw", "avx512vl"
 268         };
 269
 270         static char *power_flags[] = {
 271                 "ts",           "fid",          "vid",
 272                 "ttp",          "tm",           "stc",
 273                 "100mhzsteps",  "hwpstate",     "",
 274                 "cpb",          "eff_freq_ro",  "proc_feedback",
 275                 "acc_power",
 276         };
 277
 278         hw_model[0] = CTL_HW;
 279         hw_model[1] = HW_MODEL;
 280         model[0] = '\0';
 281         size = sizeof(model);
 282         if (kernel_sysctl(td, hw_model, 2, &model, &size, 0, 0, 0, 0) != 0)
 283                 strcpy(model, "unknown");
 284 #ifdef __i386__
 285         switch (cpu_vendor_id) {
 286         case CPU_VENDOR_AMD:
 287                 if (cpu_class < CPUCLASS_686)
 288                         cpu_feature_names[16] = "fcmov";
 289                 break;
 290         case CPU_VENDOR_CYRIX:
 291                 cpu_feature_names[24] = "cxmmx";
 292                 break;
 293         }
 294 #endif
 295         if (cpu_exthigh >= 0x80000006)
 296                 do_cpuid(0x80000006, cache_size);
 297         else
 298                 memset(cache_size, 0, sizeof(cache_size));
 299         for (i = 0; i < mp_ncpus; ++i) {
 300                 fqmhz = 0;
 301                 fqkhz = 0;
 302                 freq = atomic_load_acq_64(&tsc_freq);
 303                 if (freq != 0) {
 304                         fqmhz = (freq + 4999) / 1000000;
 305                         fqkhz = ((freq + 4999) / 10000) % 100;
 306                 }
 307                 sbuf_printf(sb,
 308                     "processor\t: %d\n"
 309                     "vendor_id\t: %.20s\n"
 310                     "cpu family\t: %u\n"
 311                     "model\t\t: %u\n"
 312                     "model name\t: %s\n"
 313                     "stepping\t: %u\n"
 314                     "cpu MHz\t\t: %d.%02d\n"
 315                     "cache size\t: %d KB\n"
 316                     "physical id\t: %d\n"
 317                     "siblings\t: %d\n"
 318                     "core id\t\t: %d\n"
 319                     "cpu cores\t: %d\n"
 320                     "apicid\t\t: %d\n"
 321                     "initial apicid\t: %d\n"
 322                     "fpu\t\t: %s\n"
 323                     "fpu_exception\t: %s\n"
 324                     "cpuid level\t: %d\n"
 325                     "wp\t\t: %s\n",
 326                     i, cpu_vendor, CPUID_TO_FAMILY(cpu_id),
 327                     CPUID_TO_MODEL(cpu_id), model, cpu_id & CPUID_STEPPING,
 328                     fqmhz, fqkhz,
 329                     (cache_size[2] >> 16), 0, mp_ncpus, i, mp_ncpus,
 330                     i, i, /*cpu_id & CPUID_LOCAL_APIC_ID ??*/
 331                     (cpu_feature & CPUID_FPU) ? "yes" : "no", "yes",
 332                     CPUID_TO_FAMILY(cpu_id), "yes");
 333                 sbuf_cat(sb, "flags\t\t:");
 334                 for (j = 0; j < nitems(cpu_feature_names); j++)
 335                         if (cpu_feature & (1 << j) &&
 336                             cpu_feature_names[j][0] != '\0')
 337                                 sbuf_printf(sb, " %s", cpu_feature_names[j]);
 338                 for (j = 0; j < nitems(amd_feature_names); j++)
 339                         if (amd_feature & (1 << j) &&
 340                             amd_feature_names[j][0] != '\0')
 341                                 sbuf_printf(sb, " %s", amd_feature_names[j]);
 342                 for (j = 0; j < nitems(cpu_feature2_names); j++)
 343                         if (cpu_feature2 & (1 << j) &&
 344                             cpu_feature2_names[j][0] != '\0')
 345                                 sbuf_printf(sb, " %s", cpu_feature2_names[j]);
 346                 for (j = 0; j < nitems(amd_feature2_names); j++)
 347                         if (amd_feature2 & (1 << j) &&
 348                             amd_feature2_names[j][0] != '\0')
 349                                 sbuf_printf(sb, " %s", amd_feature2_names[j]);
 350                 for (j = 0; j < nitems(cpu_stdext_feature_names); j++)
 351                         if (cpu_stdext_feature & (1 << j) &&
 352                             cpu_stdext_feature_names[j][0] != '\0')
 353                                 sbuf_printf(sb, " %s",
 354                                     cpu_stdext_feature_names[j]);
 355                 sbuf_cat(sb, "\n");
 356                 sbuf_printf(sb,
 357                     "bugs\t\t: %s\n"
 358                     "bogomips\t: %d.%02d\n"
 359                     "clflush size\t: %d\n"
 360                     "cache_alignment\t: %d\n"
 361                     "address sizes\t: %d bits physical, %d bits virtual\n",
 362 #if defined(I586_CPU) && !defined(NO_F00F_HACK)
 363                     (has_f00f_bug) ? "Intel F00F" : "",
 364 #else
 365                     "",
 366 #endif
 367                     fqmhz, fqkhz,
 368                     cpu_clflush_line_size, cpu_clflush_line_size,
 369                     cpu_maxphyaddr,
 370                     (cpu_maxphyaddr > 32) ? 48 : 0);
 371                 sbuf_cat(sb, "power management: ");
 372                 for (j = 0; j < nitems(power_flags); j++)
 373                         if (amd_pminfo & (1 << j))
 374                                 sbuf_printf(sb, " %s", power_flags[j]);
 375                 sbuf_cat(sb, "\n\n");
 376
 377                 /* XXX per-cpu vendor / class / model / id? */
 378         }
 379         sbuf_cat(sb, "\n");
 380
 381         return (0);
 382 }
 383 #else
 384 /* ARM64TODO: implement non-stubbed linprocfs_docpuinfo */
 385 static int
 386 linprocfs_docpuinfo(PFS_FILL_ARGS)
 387 {
 388         int i;
 389
 390         for (i = 0; i < mp_ncpus; ++i) {
 391                 sbuf_printf(sb,
 392                     "processor\t: %d\n"
 393                     "BogoMIPS\t: %d.%02d\n",
 394                     i, 0, 0);
 395                 sbuf_cat(sb, "Features\t: ");
 396                 sbuf_cat(sb, "\n");
 397                 sbuf_printf(sb,
 398                     "CPU implementer\t: \n"
 399                     "CPU architecture: \n"
 400                     "CPU variant\t: 0x%x\n"
 401                     "CPU part\t: 0x%x\n"
 402                     "CPU revision\t: %d\n",
 403                     0, 0, 0);
 404                 sbuf_cat(sb, "\n");
 405         }
 406
 407         return (0);
 408 }
 409 #endif /* __i386__ || __amd64__ */
 410
 411 /*
 412  * Filler function for proc/mtab
 413  *
 414  * This file doesn't exist in Linux' procfs, but is included here so
 415  * users can symlink /compat/linux/etc/mtab to /proc/mtab
 416  */
 417 static int
 418 linprocfs_domtab(PFS_FILL_ARGS)
 419 {
 420         struct nameidata nd;
 421         const char *lep;
 422         char *dlep, *flep, *mntto, *mntfrom, *fstype;
 423         size_t lep_len;
 424         int error;
 425         struct statfs *buf, *sp;
 426         size_t count;
 427
 428         /* resolve symlinks etc. in the emulation tree prefix */
 429         NDINIT(&nd, LOOKUP, FOLLOW, UIO_SYSSPACE, linux_emul_path, td);
 430         flep = NULL;
 431         error = namei(&nd);
 432         lep = linux_emul_path;
 433         if (error == 0) {
 434                 if (vn_fullpath(td, nd.ni_vp, &dlep, &flep) == 0)
 435                         lep = dlep;
 436                 vrele(nd.ni_vp);
 437         }
 438         lep_len = strlen(lep);
 439
 440         buf = NULL;
 441         error = kern_getfsstat(td, &buf, SIZE_T_MAX, &count,
 442             UIO_SYSSPACE, MNT_WAIT);
 443         if (error != 0) {
 444                 free(buf, M_TEMP);
 445                 free(flep, M_TEMP);
 446                 return (error);
 447         }
 448
 449         for (sp = buf; count > 0; sp++, count--) {
 450                 /* determine device name */
 451                 mntfrom = sp->f_mntfromname;
 452
 453                 /* determine mount point */
 454                 mntto = sp->f_mntonname;
 455                 if (strncmp(mntto, lep, lep_len) == 0 && mntto[lep_len] == '/')
 456                         mntto += lep_len;
 457
 458                 /* determine fs type */
 459                 fstype = sp->f_fstypename;
 460                 if (strcmp(fstype, pn->pn_info->pi_name) == 0)
 461                         mntfrom = fstype = "proc";
 462                 else if (strcmp(fstype, "procfs") == 0)
 463                         continue;
 464
 465                 if (strcmp(fstype, "autofs") == 0) {
 466                         /*
 467                          * FreeBSD uses eg "map -hosts", whereas Linux
 468                          * expects just "-hosts".
 469                          */
 470                         if (strncmp(mntfrom, "map ", 4) == 0)
 471                                 mntfrom += 4;
 472                 }
 473
 474                 if (strcmp(fstype, "linsysfs") == 0) {
 475                         sbuf_printf(sb, "/sys %s sysfs %s", mntto,
 476                             sp->f_flags & MNT_RDONLY ? "ro" : "rw");
 477                 } else {
 478                         /* For Linux msdosfs is called vfat */
 479                         if (strcmp(fstype, "msdosfs") == 0)
 480                                 fstype = "vfat";
 481                         sbuf_printf(sb, "%s %s %s %s", mntfrom, mntto, fstype,
 482                             sp->f_flags & MNT_RDONLY ? "ro" : "rw");
 483                 }
 484 #define ADD_OPTION(opt, name) \
 485         if (sp->f_flags & (opt)) sbuf_printf(sb, "," name);
 486                 ADD_OPTION(MNT_SYNCHRONOUS,     "sync");
 487                 ADD_OPTION(MNT_NOEXEC,          "noexec");
 488                 ADD_OPTION(MNT_NOSUID,          "nosuid");
 489                 ADD_OPTION(MNT_UNION,           "union");
 490                 ADD_OPTION(MNT_ASYNC,           "async");
 491                 ADD_OPTION(MNT_SUIDDIR,         "suiddir");
 492                 ADD_OPTION(MNT_NOSYMFOLLOW,     "nosymfollow");
 493                 ADD_OPTION(MNT_NOATIME,         "noatime");
 494 #undef ADD_OPTION
 495                 /* a real Linux mtab will also show NFS options */
 496                 sbuf_printf(sb, " 0 0\n");
 497         }
 498
 499         free(buf, M_TEMP);
 500         free(flep, M_TEMP);
 501         return (error);
 502 }
 503
 504 /*
 505  * Filler function for proc/partitions
 506  */
 507 static int
 508 linprocfs_dopartitions(PFS_FILL_ARGS)
 509 {
 510         struct g_class *cp;
 511         struct g_geom *gp;
 512         struct g_provider *pp;
 513         int major, minor;
 514
 515         g_topology_lock();
 516         sbuf_printf(sb, "major minor  #blocks  name rio rmerge rsect "
 517             "ruse wio wmerge wsect wuse running use aveq\n");
 518
 519         LIST_FOREACH(cp, &g_classes, class) {
 520                 if (strcmp(cp->name, "DISK") == 0 ||
 521                     strcmp(cp->name, "PART") == 0)
 522                         LIST_FOREACH(gp, &cp->geom, geom) {
 523                                 LIST_FOREACH(pp, &gp->provider, provider) {
 524                                         if (linux_driver_get_major_minor(
 525                                             pp->name, &major, &minor) != 0) {
 526                                                 major = 0;
 527                                                 minor = 0;
 528                                         }
 529                                         sbuf_printf(sb, "%d %d %lld %s "
 530                                             "%d %d %d %d %d "
 531                                              "%d %d %d %d %d %d\n",
 532                                              major, minor,
 533                                              (long long)pp->mediasize, pp->name,
 534                                              0, 0, 0, 0, 0,
 535                                              0, 0, 0, 0, 0, 0);
 536                                 }
 537                         }
 538         }
 539         g_topology_unlock();
 540
 541         return (0);
 542 }
 543
 544 /*
 545  * Filler function for proc/stat
 546  *
 547  * Output depends on kernel version:
 548  *
 549  * v2.5.40 <=
 550  *   user nice system idle
 551  * v2.5.41
 552  *   user nice system idle iowait
 553  * v2.6.11
 554  *   user nice system idle iowait irq softirq steal
 555  * v2.6.24
 556  *   user nice system idle iowait irq softirq steal guest
 557  * v2.6.33 >=
 558  *   user nice system idle iowait irq softirq steal guest guest_nice
 559  */
 560 static int
 561 linprocfs_dostat(PFS_FILL_ARGS)
 562 {
 563         struct pcpu *pcpu;
 564         long cp_time[CPUSTATES];
 565         long *cp;
 566         struct timeval boottime;
 567         int i;
 568         char *zero_pad;
 569         bool has_intr = true;
 570
 571         if (linux_kernver(td) >= LINUX_KERNVER(2,6,33)) {
 572                 zero_pad = " 0 0 0 0\n";
 573         } else if (linux_kernver(td) >= LINUX_KERNVER(2,6,24)) {
 574                 zero_pad = " 0 0 0\n";
 575         } else if (linux_kernver(td) >= LINUX_KERNVER(2,6,11)) {
 576                 zero_pad = " 0 0\n";
 577         } else if (linux_kernver(td) >= LINUX_KERNVER(2,5,41)) {
 578                 has_intr = false;
 579                 zero_pad = " 0\n";
 580         } else {
 581                 has_intr = false;
 582                 zero_pad = "\n";
 583         }
 584
 585         read_cpu_time(cp_time);
 586         getboottime(&boottime);
 587         /* Parameters common to all versions */
 588         sbuf_printf(sb, "cpu %lu %lu %lu %lu",
 589             T2J(cp_time[CP_USER]),
 590             T2J(cp_time[CP_NICE]),
 591             T2J(cp_time[CP_SYS]),
 592             T2J(cp_time[CP_IDLE]));
 593
 594         /* Print interrupt stats if available */
 595         if (has_intr) {
 596                 sbuf_printf(sb, " 0 %lu", T2J(cp_time[CP_INTR]));
 597         }
 598
 599         /* Pad out remaining fields depending on version */
 600         sbuf_printf(sb, "%s", zero_pad);
 601
 602         CPU_FOREACH(i) {
 603                 pcpu = pcpu_find(i);
 604                 cp = pcpu->pc_cp_time;
 605                 sbuf_printf(sb, "cpu%d %lu %lu %lu %lu", i,
 606                     T2J(cp[CP_USER]),
 607                     T2J(cp[CP_NICE]),
 608                     T2J(cp[CP_SYS]),
 609                     T2J(cp[CP_IDLE]));
 610
 611                 if (has_intr) {
 612                         sbuf_printf(sb, " 0 %lu", T2J(cp[CP_INTR]));
 613                 }
 614
 615                 sbuf_printf(sb, "%s", zero_pad);
 616         }
 617         sbuf_printf(sb,
 618             "disk 0 0 0 0\n"
 619             "page %ju %ju\n"
 620             "swap %ju %ju\n"
 621             "intr %ju\n"
 622             "ctxt %ju\n"
 623             "btime %lld\n",
 624             (uintmax_t)VM_CNT_FETCH(v_vnodepgsin),
 625             (uintmax_t)VM_CNT_FETCH(v_vnodepgsout),
 626             (uintmax_t)VM_CNT_FETCH(v_swappgsin),
 627             (uintmax_t)VM_CNT_FETCH(v_swappgsout),
 628             (uintmax_t)VM_CNT_FETCH(v_intr),
 629             (uintmax_t)VM_CNT_FETCH(v_swtch),
 630             (long long)boottime.tv_sec);
 631         return (0);
 632 }
 633
 634 static int
 635 linprocfs_doswaps(PFS_FILL_ARGS)
 636 {
 637         struct xswdev xsw;
 638         uintmax_t total, used;
 639         int n;
 640         char devname[SPECNAMELEN + 1];
 641
 642         sbuf_printf(sb, "Filename\t\t\t\tType\t\tSize\tUsed\tPriority\n");
 643         for (n = 0; ; n++) {
 644                 if (swap_dev_info(n, &xsw, devname, sizeof(devname)) != 0)
 645                         break;
 646                 total = (uintmax_t)xsw.xsw_nblks * PAGE_SIZE / 1024;
 647                 used  = (uintmax_t)xsw.xsw_used * PAGE_SIZE / 1024;
 648
 649                 /*
 650                  * The space and not tab after the device name is on
 651                  * purpose.  Linux does so.
 652                  */
 653                 sbuf_printf(sb, "/dev/%-34s unknown\t\t%jd\t%jd\t-1\n",
 654                     devname, total, used);
 655         }
 656         return (0);
 657 }
 658
 659 /*
 660  * Filler function for proc/uptime
 661  */
 662 static int
 663 linprocfs_douptime(PFS_FILL_ARGS)
 664 {
 665         long cp_time[CPUSTATES];
 666         struct timeval tv;
 667
 668         getmicrouptime(&tv);
 669         read_cpu_time(cp_time);
 670         sbuf_printf(sb, "%lld.%02ld %ld.%02lu\n",
 671             (long long)tv.tv_sec, tv.tv_usec / 10000,
 672             T2S(cp_time[CP_IDLE] / mp_ncpus),
 673             T2CS(cp_time[CP_IDLE] / mp_ncpus) % 100);
 674         return (0);
 675 }
 676
 677 /*
 678  * Get OS build date
 679  */
 680 static void
 681 linprocfs_osbuild(struct thread *td, struct sbuf *sb)
 682 {
 683 #if 0
 684         char osbuild[256];
 685         char *cp1, *cp2;
 686
 687         strncpy(osbuild, version, 256);
 688         osbuild[255] = '\0';
 689         cp1 = strstr(osbuild, "\n");
 690         cp2 = strstr(osbuild, ":");
 691         if (cp1 && cp2) {
 692                 *cp1 = *cp2 = '\0';
 693                 cp1 = strstr(osbuild, "#");
 694         } else
 695                 cp1 = NULL;
 696         if (cp1)
 697                 sbuf_printf(sb, "%s%s", cp1, cp2 + 1);
 698         else
 699 #endif
 700                 sbuf_cat(sb, "#4 Sun Dec 18 04:30:00 CET 1977");
 701 }
 702
 703 /*
 704  * Get OS builder
 705  */
 706 static void
 707 linprocfs_osbuilder(struct thread *td, struct sbuf *sb)
 708 {
 709 #if 0
 710         char builder[256];
 711         char *cp;
 712
 713         cp = strstr(version, "\n    ");
 714         if (cp) {
 715                 strncpy(builder, cp + 5, 256);
 716                 builder[255] = '\0';
 717                 cp = strstr(builder, ":");
 718                 if (cp)
 719                         *cp = '\0';
 720         }
 721         if (cp)
 722                 sbuf_cat(sb, builder);
 723         else
 724 #endif
 725                 sbuf_cat(sb, "des@freebsd.org");
 726 }
 727
 728 /*
 729  * Filler function for proc/version
 730  */
 731 static int
 732 linprocfs_doversion(PFS_FILL_ARGS)
 733 {
 734         char osname[LINUX_MAX_UTSNAME];
 735         char osrelease[LINUX_MAX_UTSNAME];
 736
 737         linux_get_osname(td, osname);
 738         linux_get_osrelease(td, osrelease);
 739         sbuf_printf(sb, "%s version %s (", osname, osrelease);
 740         linprocfs_osbuilder(td, sb);
 741         sbuf_cat(sb, ") (gcc version " __VERSION__ ") ");
 742         linprocfs_osbuild(td, sb);
 743         sbuf_cat(sb, "\n");
 744
 745         return (0);
 746 }
 747
 748 /*
 749  * Filler function for proc/loadavg
 750  */
 751 static int
 752 linprocfs_doloadavg(PFS_FILL_ARGS)
 753 {
 754
 755         sbuf_printf(sb,
 756             "%d.%02d %d.%02d %d.%02d %d/%d %d\n",
 757             (int)(averunnable.ldavg[0] / averunnable.fscale),
 758             (int)(averunnable.ldavg[0] * 100 / averunnable.fscale % 100),
 759             (int)(averunnable.ldavg[1] / averunnable.fscale),
 760             (int)(averunnable.ldavg[1] * 100 / averunnable.fscale % 100),
 761             (int)(averunnable.ldavg[2] / averunnable.fscale),
 762             (int)(averunnable.ldavg[2] * 100 / averunnable.fscale % 100),
 763             1,                          /* number of running tasks */
 764             nprocs,                     /* number of tasks */
 765             lastpid                     /* the last pid */
 766         );
 767         return (0);
 768 }
 769
 770 /*
 771  * Filler function for proc/pid/stat
 772  */
 773 static int
 774 linprocfs_doprocstat(PFS_FILL_ARGS)
 775 {
 776         struct kinfo_proc kp;
 777         struct timeval boottime;
 778         char state;
 779         static int ratelimit = 0;
 780         vm_offset_t startcode, startdata;
 781
 782         getboottime(&boottime);
 783         sx_slock(&proctree_lock);
 784         PROC_LOCK(p);
 785         fill_kinfo_proc(p, &kp);
 786         sx_sunlock(&proctree_lock);
 787         if (p->p_vmspace) {
 788            startcode = (vm_offset_t)p->p_vmspace->vm_taddr;
 789            startdata = (vm_offset_t)p->p_vmspace->vm_daddr;
 790         } else {
 791            startcode = 0;
 792            startdata = 0;
 793         }
 794         sbuf_printf(sb, "%d", p->p_pid);
 795 #define PS_ADD(name, fmt, arg) sbuf_printf(sb, " " fmt, arg)
 796         PS_ADD("comm",          "(%s)", p->p_comm);
 797         if (kp.ki_stat > sizeof(linux_state)) {
 798                 state = 'R';
 799
 800                 if (ratelimit == 0) {
 801                         printf("linprocfs: don't know how to handle unknown FreeBSD state %d/%zd, mapping to R\n",
 802                             kp.ki_stat, sizeof(linux_state));
 803                         ++ratelimit;
 804                 }
 805         } else
 806                 state = linux_state[kp.ki_stat - 1];
 807         PS_ADD("state",         "%c",   state);
 808         PS_ADD("ppid",          "%d",   p->p_pptr ? p->p_pptr->p_pid : 0);
 809         PS_ADD("pgrp",          "%d",   p->p_pgid);
 810         PS_ADD("session",       "%d",   p->p_session->s_sid);
 811         PROC_UNLOCK(p);
 812         if (kp.ki_tdev == NODEV)
 813                 PS_ADD("tty",   "%s",   "-1");
 814         else
 815                 PS_ADD("tty",           "%ju",  (uintmax_t)kp.ki_tdev);
 816         PS_ADD("tpgid",         "%d",   kp.ki_tpgid);
 817         PS_ADD("flags",         "%u",   0); /* XXX */
 818         PS_ADD("minflt",        "%lu",  kp.ki_rusage.ru_minflt);
 819         PS_ADD("cminflt",       "%lu",  kp.ki_rusage_ch.ru_minflt);
 820         PS_ADD("majflt",        "%lu",  kp.ki_rusage.ru_majflt);
 821         PS_ADD("cmajflt",       "%lu",  kp.ki_rusage_ch.ru_majflt);
 822         PS_ADD("utime",         "%ld",  TV2J(&kp.ki_rusage.ru_utime));
 823         PS_ADD("stime",         "%ld",  TV2J(&kp.ki_rusage.ru_stime));
 824         PS_ADD("cutime",        "%ld",  TV2J(&kp.ki_rusage_ch.ru_utime));
 825         PS_ADD("cstime",        "%ld",  TV2J(&kp.ki_rusage_ch.ru_stime));
 826         PS_ADD("priority",      "%d",   kp.ki_pri.pri_user);
 827         PS_ADD("nice",          "%d",   kp.ki_nice); /* 19 (nicest) to -19 */
 828         PS_ADD("0",             "%d",   0); /* removed field */
 829         PS_ADD("itrealvalue",   "%d",   0); /* XXX */
 830         PS_ADD("starttime",     "%lu",  TV2J(&kp.ki_start) - TV2J(&boottime));
 831         PS_ADD("vsize",         "%ju",  P2K((uintmax_t)kp.ki_size));
 832         PS_ADD("rss",           "%ju",  (uintmax_t)kp.ki_rssize);
 833         PS_ADD("rlim",          "%lu",  kp.ki_rusage.ru_maxrss);
 834         PS_ADD("startcode",     "%ju",  (uintmax_t)startcode);
 835         PS_ADD("endcode",       "%ju",  (uintmax_t)startdata);
 836         PS_ADD("startstack",    "%u",   0); /* XXX */
 837         PS_ADD("kstkesp",       "%u",   0); /* XXX */
 838         PS_ADD("kstkeip",       "%u",   0); /* XXX */
 839         PS_ADD("signal",        "%u",   0); /* XXX */
 840         PS_ADD("blocked",       "%u",   0); /* XXX */
 841         PS_ADD("sigignore",     "%u",   0); /* XXX */
 842         PS_ADD("sigcatch",      "%u",   0); /* XXX */
 843         PS_ADD("wchan",         "%u",   0); /* XXX */
 844         PS_ADD("nswap",         "%lu",  kp.ki_rusage.ru_nswap);
 845         PS_ADD("cnswap",        "%lu",  kp.ki_rusage_ch.ru_nswap);
 846         PS_ADD("exitsignal",    "%d",   0); /* XXX */
 847         PS_ADD("processor",     "%u",   kp.ki_lastcpu);
 848         PS_ADD("rt_priority",   "%u",   0); /* XXX */ /* >= 2.5.19 */
 849         PS_ADD("policy",        "%u",   kp.ki_pri.pri_class); /* >= 2.5.19 */
 850 #undef PS_ADD
 851         sbuf_putc(sb, '\n');
 852
 853         return (0);
 854 }
 855
 856 /*
 857  * Filler function for proc/pid/statm
 858  */
 859 static int
 860 linprocfs_doprocstatm(PFS_FILL_ARGS)
 861 {
 862         struct kinfo_proc kp;
 863         segsz_t lsize;
 864
 865         sx_slock(&proctree_lock);
 866         PROC_LOCK(p);
 867         fill_kinfo_proc(p, &kp);
 868         PROC_UNLOCK(p);
 869         sx_sunlock(&proctree_lock);
 870
 871         /*
 872          * See comments in linprocfs_doprocstatus() regarding the
 873          * computation of lsize.
 874          */
 875         /* size resident share trs drs lrs dt */
 876         sbuf_printf(sb, "%ju ", B2P((uintmax_t)kp.ki_size));
 877         sbuf_printf(sb, "%ju ", (uintmax_t)kp.ki_rssize);
 878         sbuf_printf(sb, "%ju ", (uintmax_t)0); /* XXX */
 879         sbuf_printf(sb, "%ju ", (uintmax_t)kp.ki_tsize);
 880         sbuf_printf(sb, "%ju ", (uintmax_t)(kp.ki_dsize + kp.ki_ssize));
 881         lsize = B2P(kp.ki_size) - kp.ki_dsize -
 882             kp.ki_ssize - kp.ki_tsize - 1;
 883         sbuf_printf(sb, "%ju ", (uintmax_t)lsize);
 884         sbuf_printf(sb, "%ju\n", (uintmax_t)0); /* XXX */
 885
 886         return (0);
 887 }
 888
 889 /*
 890  * Filler function for proc/pid/status
 891  */
 892 static int
 893 linprocfs_doprocstatus(PFS_FILL_ARGS)
 894 {
 895         struct kinfo_proc kp;
 896         char *state;
 897         segsz_t lsize;
 898         struct thread *td2;
 899         struct sigacts *ps;
 900         l_sigset_t siglist, sigignore, sigcatch;
 901         int i;
 902
 903         sx_slock(&proctree_lock);
 904         PROC_LOCK(p);
 905         td2 = FIRST_THREAD_IN_PROC(p); /* XXXKSE pretend only one thread */
 906
 907         if (P_SHOULDSTOP(p)) {
 908                 state = "T (stopped)";
 909         } else {
 910                 switch(p->p_state) {
 911                 case PRS_NEW:
 912                         state = "I (idle)";
 913                         break;
 914                 case PRS_NORMAL:
 915                         if (p->p_flag & P_WEXIT) {
 916                                 state = "X (exiting)";
 917                                 break;
 918                         }
 919                         switch(td2->td_state) {
 920                         case TDS_INHIBITED:
 921                                 state = "S (sleeping)";
 922                                 break;
 923                         case TDS_RUNQ:
 924                         case TDS_RUNNING:
 925                                 state = "R (running)";
 926                                 break;
 927                         default:
 928                                 state = "? (unknown)";
 929                                 break;
 930                         }
 931                         break;
 932                 case PRS_ZOMBIE:
 933                         state = "Z (zombie)";
 934                         break;
 935                 default:
 936                         state = "? (unknown)";
 937                         break;
 938                 }
 939         }
 940
 941         fill_kinfo_proc(p, &kp);
 942         sx_sunlock(&proctree_lock);
 943
 944         sbuf_printf(sb, "Name:\t%s\n",          p->p_comm); /* XXX escape */
 945         sbuf_printf(sb, "State:\t%s\n",         state);
 946
 947         /*
 948          * Credentials
 949          */
 950         sbuf_printf(sb, "Tgid:\t%d\n",          p->p_pid);
 951         sbuf_printf(sb, "Pid:\t%d\n",           p->p_pid);
 952         sbuf_printf(sb, "PPid:\t%d\n",          kp.ki_ppid );
 953         sbuf_printf(sb, "TracerPid:\t%d\n",     kp.ki_tracer );
 954         sbuf_printf(sb, "Uid:\t%d %d %d %d\n",  p->p_ucred->cr_ruid,
 955                                                 p->p_ucred->cr_uid,
 956                                                 p->p_ucred->cr_svuid,
 957                                                 /* FreeBSD doesn't have fsuid */
 958                                                 p->p_ucred->cr_uid);
 959         sbuf_printf(sb, "Gid:\t%d %d %d %d\n",  p->p_ucred->cr_rgid,
 960                                                 p->p_ucred->cr_gid,
 961                                                 p->p_ucred->cr_svgid,
 962                                                 /* FreeBSD doesn't have fsgid */
 963                                                 p->p_ucred->cr_gid);
 964         sbuf_cat(sb, "Groups:\t");
 965         for (i = 0; i < p->p_ucred->cr_ngroups; i++)
 966                 sbuf_printf(sb, "%d ",          p->p_ucred->cr_groups[i]);
 967         PROC_UNLOCK(p);
 968         sbuf_putc(sb, '\n');
 969
 970         /*
 971          * Memory
 972          *
 973          * While our approximation of VmLib may not be accurate (I
 974          * don't know of a simple way to verify it, and I'm not sure
 975          * it has much meaning anyway), I believe it's good enough.
 976          *
 977          * The same code that could (I think) accurately compute VmLib
 978          * could also compute VmLck, but I don't really care enough to
 979          * implement it. Submissions are welcome.
 980          */
 981         sbuf_printf(sb, "VmSize:\t%8ju kB\n",   B2K((uintmax_t)kp.ki_size));
 982         sbuf_printf(sb, "VmLck:\t%8u kB\n",     P2K(0)); /* XXX */
 983         sbuf_printf(sb, "VmRSS:\t%8ju kB\n",    P2K((uintmax_t)kp.ki_rssize));
 984         sbuf_printf(sb, "VmData:\t%8ju kB\n",   P2K((uintmax_t)kp.ki_dsize));
 985         sbuf_printf(sb, "VmStk:\t%8ju kB\n",    P2K((uintmax_t)kp.ki_ssize));
 986         sbuf_printf(sb, "VmExe:\t%8ju kB\n",    P2K((uintmax_t)kp.ki_tsize));
 987         lsize = B2P(kp.ki_size) - kp.ki_dsize -
 988             kp.ki_ssize - kp.ki_tsize - 1;
 989         sbuf_printf(sb, "VmLib:\t%8ju kB\n",    P2K((uintmax_t)lsize));
 990
 991         /*
 992          * Signal masks
 993          */
 994         PROC_LOCK(p);
 995         bsd_to_linux_sigset(&p->p_siglist, &siglist);
 996         ps = p->p_sigacts;
 997         mtx_lock(&ps->ps_mtx);
 998         bsd_to_linux_sigset(&ps->ps_sigignore, &sigignore);
 999         bsd_to_linux_sigset(&ps->ps_sigcatch, &sigcatch);
1000         mtx_unlock(&ps->ps_mtx);
1001         PROC_UNLOCK(p);
1002
1003         sbuf_printf(sb, "SigPnd:\t%016jx\n",    siglist.__mask);
1004         /*
1005          * XXX. SigBlk - target thread's signal mask, td_sigmask.
1006          * To implement SigBlk pseudofs should support proc/tid dir entries.
1007          */
1008         sbuf_printf(sb, "SigBlk:\t%016x\n",     0);
1009         sbuf_printf(sb, "SigIgn:\t%016jx\n",    sigignore.__mask);
1010         sbuf_printf(sb, "SigCgt:\t%016jx\n",    sigcatch.__mask);
1011
1012         /*
1013          * Linux also prints the capability masks, but we don't have
1014          * capabilities yet, and when we do get them they're likely to
1015          * be meaningless to Linux programs, so we lie. XXX
1016          */
1017         sbuf_printf(sb, "CapInh:\t%016x\n",     0);
1018         sbuf_printf(sb, "CapPrm:\t%016x\n",     0);
1019         sbuf_printf(sb, "CapEff:\t%016x\n",     0);
1020
1021         return (0);
1022 }
1023
1024
1025 /*
1026  * Filler function for proc/pid/cwd
1027  */
1028 static int
1029 linprocfs_doproccwd(PFS_FILL_ARGS)
1030 {
1031         struct pwd *pwd;
1032         char *fullpath = "unknown";
1033         char *freepath = NULL;
1034
1035         pwd = pwd_hold(td);
1036         vn_fullpath(td, pwd->pwd_cdir, &fullpath, &freepath);
1037         sbuf_printf(sb, "%s", fullpath);
1038         if (freepath)
1039                 free(freepath, M_TEMP);
1040         pwd_drop(pwd);
1041         return (0);
1042 }
1043
1044 /*
1045  * Filler function for proc/pid/root
1046  */
1047 static int
1048 linprocfs_doprocroot(PFS_FILL_ARGS)
1049 {
1050         struct pwd *pwd;
1051         struct vnode *vp;
1052         char *fullpath = "unknown";
1053         char *freepath = NULL;
1054
1055         pwd = pwd_hold(td);
1056         vp = jailed(p->p_ucred) ? pwd->pwd_jdir : pwd->pwd_rdir;
1057         vn_fullpath(td, vp, &fullpath, &freepath);
1058         sbuf_printf(sb, "%s", fullpath);
1059         if (freepath)
1060                 free(freepath, M_TEMP);
1061         pwd_drop(pwd);
1062         return (0);
1063 }
1064
1065 /*
1066  * Filler function for proc/pid/cmdline
1067  */
1068 static int
1069 linprocfs_doproccmdline(PFS_FILL_ARGS)
1070 {
1071         int ret;
1072
1073         PROC_LOCK(p);
1074         if ((ret = p_cansee(td, p)) != 0) {
1075                 PROC_UNLOCK(p);
1076                 return (ret);
1077         }
1078
1079         /*
1080          * Mimic linux behavior and pass only processes with usermode
1081          * address space as valid.  Return zero silently otherwize.
1082          */
1083         if (p->p_vmspace == &vmspace0) {
1084                 PROC_UNLOCK(p);
1085                 return (0);
1086         }
1087         if (p->p_args != NULL) {
1088                 sbuf_bcpy(sb, p->p_args->ar_args, p->p_args->ar_length);
1089                 PROC_UNLOCK(p);
1090                 return (0);
1091         }
1092
1093         if ((p->p_flag & P_SYSTEM) != 0) {
1094                 PROC_UNLOCK(p);
1095                 return (0);
1096         }
1097
1098         PROC_UNLOCK(p);
1099
1100         ret = proc_getargv(td, p, sb);
1101         return (ret);
1102 }
1103
1104 /*
1105  * Filler function for proc/pid/environ
1106  */
1107 static int
1108 linprocfs_doprocenviron(PFS_FILL_ARGS)
1109 {
1110
1111         /*
1112          * Mimic linux behavior and pass only processes with usermode
1113          * address space as valid.  Return zero silently otherwize.
1114          */
1115         if (p->p_vmspace == &vmspace0)
1116                 return (0);
1117
1118         return (proc_getenvv(td, p, sb));
1119 }
1120
1121 static char l32_map_str[] = "%08lx-%08lx %s%s%s%s %08lx %02x:%02x %lu%s%s\n";
1122 static char l64_map_str[] = "%016lx-%016lx %s%s%s%s %08lx %02x:%02x %lu%s%s\n";
1123 static char vdso_str[] = "      [vdso]";
1124 static char stack_str[] = "      [stack]";
1125
1126 /*
1127  * Filler function for proc/pid/maps
1128  */
1129 static int
1130 linprocfs_doprocmaps(PFS_FILL_ARGS)
1131 {
1132         struct vmspace *vm;
1133         vm_map_t map;
1134         vm_map_entry_t entry, tmp_entry;
1135         vm_object_t obj, tobj, lobj;
1136         vm_offset_t e_start, e_end;
1137         vm_ooffset_t off;
1138         vm_prot_t e_prot;
1139         unsigned int last_timestamp;
1140         char *name = "", *freename = NULL;
1141         const char *l_map_str;
1142         ino_t ino;
1143         int ref_count, shadow_count, flags;
1144         int error;
1145         struct vnode *vp;
1146         struct vattr vat;
1147         bool private;
1148
1149         PROC_LOCK(p);
1150         error = p_candebug(td, p);
1151         PROC_UNLOCK(p);
1152         if (error)
1153                 return (error);
1154
1155         if (uio->uio_rw != UIO_READ)
1156                 return (EOPNOTSUPP);
1157
1158         error = 0;
1159         vm = vmspace_acquire_ref(p);
1160         if (vm == NULL)
1161                 return (ESRCH);
1162
1163         if (SV_CURPROC_FLAG(SV_LP64))
1164                 l_map_str = l64_map_str;
1165         else
1166                 l_map_str = l32_map_str;
1167         map = &vm->vm_map;
1168         vm_map_lock_read(map);
1169         VM_MAP_ENTRY_FOREACH(entry, map) {
1170                 name = "";
1171                 freename = NULL;
1172                 if (entry->eflags & MAP_ENTRY_IS_SUB_MAP)
1173                         continue;
1174                 e_prot = entry->protection;
1175                 e_start = entry->start;
1176                 e_end = entry->end;
1177                 obj = entry->object.vm_object;
1178                 off = entry->offset;
1179                 for (lobj = tobj = obj; tobj != NULL;
1180                     lobj = tobj, tobj = tobj->backing_object) {
1181                         VM_OBJECT_RLOCK(tobj);
1182                         off += lobj->backing_object_offset;
1183                         if (lobj != obj)
1184                                 VM_OBJECT_RUNLOCK(lobj);
1185                 }
1186                 private = (entry->eflags & MAP_ENTRY_COW) != 0 || obj == NULL ||
1187                     (obj->flags & OBJ_ANON) != 0;
1188                 last_timestamp = map->timestamp;
1189                 vm_map_unlock_read(map);
1190                 ino = 0;
1191                 if (lobj) {
1192                         vp = vm_object_vnode(lobj);
1193                         if (vp != NULL)
1194                                 vref(vp);
1195                         if (lobj != obj)
1196                                 VM_OBJECT_RUNLOCK(lobj);
1197                         flags = obj->flags;
1198                         ref_count = obj->ref_count;
1199                         shadow_count = obj->shadow_count;
1200                         VM_OBJECT_RUNLOCK(obj);
1201                         if (vp != NULL) {
1202                                 vn_fullpath(td, vp, &name, &freename);
1203                                 vn_lock(vp, LK_SHARED | LK_RETRY);
1204                                 VOP_GETATTR(vp, &vat, td->td_ucred);
1205                                 ino = vat.va_fileid;
1206                                 vput(vp);
1207                         } else if (SV_PROC_ABI(p) == SV_ABI_LINUX) {
1208                                 if (e_start == p->p_sysent->sv_shared_page_base)
1209                                         name = vdso_str;
1210                                 if (e_end == p->p_sysent->sv_usrstack)
1211                                         name = stack_str;
1212                         }
1213                 } else {
1214                         flags = 0;
1215                         ref_count = 0;
1216                         shadow_count = 0;
1217                 }
1218
1219                 /*
1220                  * format:
1221                  *  start, end, access, offset, major, minor, inode, name.
1222                  */
1223                 error = sbuf_printf(sb, l_map_str,
1224                     (u_long)e_start, (u_long)e_end,
1225                     (e_prot & VM_PROT_READ)?"r":"-",
1226                     (e_prot & VM_PROT_WRITE)?"w":"-",
1227                     (e_prot & VM_PROT_EXECUTE)?"x":"-",
1228                     private ? "p" : "s",
1229                     (u_long)off,
1230                     0,
1231                     0,
1232                     (u_long)ino,
1233                     *name ? "     " : "",
1234                     name
1235                     );
1236                 if (freename)
1237                         free(freename, M_TEMP);
1238                 vm_map_lock_read(map);
1239                 if (error == -1) {
1240                         error = 0;
1241                         break;
1242                 }
1243                 if (last_timestamp != map->timestamp) {
1244                         /*
1245                          * Look again for the entry because the map was
1246                          * modified while it was unlocked.  Specifically,
1247                          * the entry may have been clipped, merged, or deleted.
1248                          */
1249                         vm_map_lookup_entry(map, e_end - 1, &tmp_entry);
1250                         entry = tmp_entry;
1251                 }
1252         }
1253         vm_map_unlock_read(map);
1254         vmspace_free(vm);
1255
1256         return (error);
1257 }
1258
1259 /*
1260  * Criteria for interface name translation
1261  */
1262 #define IFP_IS_ETH(ifp) (ifp->if_type == IFT_ETHER)
1263
1264 static int
1265 linux_ifname(struct ifnet *ifp, char *buffer, size_t buflen)
1266 {
1267         struct ifnet *ifscan;
1268         int ethno;
1269
1270         IFNET_RLOCK_ASSERT();
1271
1272         /* Short-circuit non ethernet interfaces */
1273         if (!IFP_IS_ETH(ifp))
1274                 return (strlcpy(buffer, ifp->if_xname, buflen));
1275
1276         /* Determine the (relative) unit number for ethernet interfaces */
1277         ethno = 0;
1278         CK_STAILQ_FOREACH(ifscan, &V_ifnet, if_link) {
1279                 if (ifscan == ifp)
1280                         return (snprintf(buffer, buflen, "eth%d", ethno));
1281                 if (IFP_IS_ETH(ifscan))
1282                         ethno++;
1283         }
1284
1285         return (0);
1286 }
1287
1288 /*
1289  * Filler function for proc/net/dev
1290  */
1291 static int
1292 linprocfs_donetdev(PFS_FILL_ARGS)
1293 {
1294         char ifname[16]; /* XXX LINUX_IFNAMSIZ */
1295         struct ifnet *ifp;
1296
1297         sbuf_printf(sb, "%6s|%58s|%s\n"
1298             "%6s|%58s|%58s\n",
1299             "Inter-", "   Receive", "  Transmit",
1300             " face",
1301             "bytes    packets errs drop fifo frame compressed multicast",
1302             "bytes    packets errs drop fifo colls carrier compressed");
1303
1304         CURVNET_SET(TD_TO_VNET(curthread));
1305         IFNET_RLOCK();
1306         CK_STAILQ_FOREACH(ifp, &V_ifnet, if_link) {
1307                 linux_ifname(ifp, ifname, sizeof ifname);
1308                 sbuf_printf(sb, "%6.6s: ", ifname);
1309                 sbuf_printf(sb, "%7ju %7ju %4ju %4ju %4lu %5lu %10lu %9ju ",
1310                     (uintmax_t )ifp->if_get_counter(ifp, IFCOUNTER_IBYTES),
1311                     (uintmax_t )ifp->if_get_counter(ifp, IFCOUNTER_IPACKETS),
1312                     (uintmax_t )ifp->if_get_counter(ifp, IFCOUNTER_IERRORS),
1313                     (uintmax_t )ifp->if_get_counter(ifp, IFCOUNTER_IQDROPS),
1314                                                         /* rx_missed_errors */
1315                     0UL,                                /* rx_fifo_errors */
1316                     0UL,                                /* rx_length_errors +
1317                                                          * rx_over_errors +
1318                                                          * rx_crc_errors +
1319                                                          * rx_frame_errors */
1320                     0UL,                                /* rx_compressed */
1321                     (uintmax_t )ifp->if_get_counter(ifp, IFCOUNTER_IMCASTS));
1322                                                         /* XXX-BZ rx only? */
1323                 sbuf_printf(sb, "%8ju %7ju %4ju %4ju %4lu %5ju %7lu %10lu\n",
1324                     (uintmax_t )ifp->if_get_counter(ifp, IFCOUNTER_OBYTES),
1325                     (uintmax_t )ifp->if_get_counter(ifp, IFCOUNTER_OPACKETS),
1326                     (uintmax_t )ifp->if_get_counter(ifp, IFCOUNTER_OERRORS),
1327                     (uintmax_t )ifp->if_get_counter(ifp, IFCOUNTER_OQDROPS),
1328                     0UL,                                /* tx_fifo_errors */
1329                     (uintmax_t )ifp->if_get_counter(ifp, IFCOUNTER_COLLISIONS),
1330                     0UL,                                /* tx_carrier_errors +
1331                                                          * tx_aborted_errors +
1332                                                          * tx_window_errors +
1333                                                          * tx_heartbeat_errors*/
1334                     0UL);                               /* tx_compressed */
1335         }
1336         IFNET_RUNLOCK();
1337         CURVNET_RESTORE();
1338
1339         return (0);
1340 }
1341
1342 /*
1343  * Filler function for proc/sys/kernel/osrelease
1344  */
1345 static int
1346 linprocfs_doosrelease(PFS_FILL_ARGS)
1347 {
1348         char osrelease[LINUX_MAX_UTSNAME];
1349
1350         linux_get_osrelease(td, osrelease);
1351         sbuf_printf(sb, "%s\n", osrelease);
1352
1353         return (0);
1354 }
1355
1356 /*
1357  * Filler function for proc/sys/kernel/ostype
1358  */
1359 static int
1360 linprocfs_doostype(PFS_FILL_ARGS)
1361 {
1362         char osname[LINUX_MAX_UTSNAME];
1363
1364         linux_get_osname(td, osname);
1365         sbuf_printf(sb, "%s\n", osname);
1366
1367         return (0);
1368 }
1369
1370 /*
1371  * Filler function for proc/sys/kernel/version
1372  */
1373 static int
1374 linprocfs_doosbuild(PFS_FILL_ARGS)
1375 {
1376
1377         linprocfs_osbuild(td, sb);
1378         sbuf_cat(sb, "\n");
1379         return (0);
1380 }
1381
1382 /*
1383  * Filler function for proc/sys/kernel/msgmni
1384  */
1385 static int
1386 linprocfs_domsgmni(PFS_FILL_ARGS)
1387 {
1388
1389         sbuf_printf(sb, "%d\n", msginfo.msgmni);
1390         return (0);
1391 }
1392
1393 /*
1394  * Filler function for proc/sys/kernel/pid_max
1395  */
1396 static int
1397 linprocfs_dopid_max(PFS_FILL_ARGS)
1398 {
1399
1400         sbuf_printf(sb, "%i\n", PID_MAX);
1401         return (0);
1402 }
1403
1404 /*
1405  * Filler function for proc/sys/kernel/sem
1406  */
1407 static int
1408 linprocfs_dosem(PFS_FILL_ARGS)
1409 {
1410
1411         sbuf_printf(sb, "%d %d %d %d\n", seminfo.semmsl, seminfo.semmns,
1412             seminfo.semopm, seminfo.semmni);
1413         return (0);
1414 }
1415
1416 /*
1417  * Filler function for proc/sys/vm/min_free_kbytes
1418  *
1419  * This mirrors the approach in illumos to return zero for reads. Effectively,
1420  * it says, no memory is kept in reserve for "atomic allocations". This class
1421  * of allocation can be used at times when a thread cannot be suspended.
1422  */
1423 static int
1424 linprocfs_dominfree(PFS_FILL_ARGS)
1425 {
1426
1427         sbuf_printf(sb, "%d\n", 0);
1428         return (0);
1429 }
1430
1431 /*
1432  * Filler function for proc/scsi/device_info
1433  */
1434 static int
1435 linprocfs_doscsidevinfo(PFS_FILL_ARGS)
1436 {
1437
1438         return (0);
1439 }
1440
1441 /*
1442  * Filler function for proc/scsi/scsi
1443  */
1444 static int
1445 linprocfs_doscsiscsi(PFS_FILL_ARGS)
1446 {
1447
1448         return (0);
1449 }
1450
1451 /*
1452  * Filler function for proc/devices
1453  */
1454 static int
1455 linprocfs_dodevices(PFS_FILL_ARGS)
1456 {
1457         char *char_devices;
1458         sbuf_printf(sb, "Character devices:\n");
1459
1460         char_devices = linux_get_char_devices();
1461         sbuf_printf(sb, "%s", char_devices);
1462         linux_free_get_char_devices(char_devices);
1463
1464         sbuf_printf(sb, "\nBlock devices:\n");
1465
1466         return (0);
1467 }
1468
1469 /*
1470  * Filler function for proc/cmdline
1471  */
1472 static int
1473 linprocfs_docmdline(PFS_FILL_ARGS)
1474 {
1475
1476         sbuf_printf(sb, "BOOT_IMAGE=%s", kernelname);
1477         sbuf_printf(sb, " ro root=302\n");
1478         return (0);
1479 }
1480
1481 /*
1482  * Filler function for proc/filesystems
1483  */
1484 static int
1485 linprocfs_dofilesystems(PFS_FILL_ARGS)
1486 {
1487         struct vfsconf *vfsp;
1488
1489         vfsconf_slock();
1490         TAILQ_FOREACH(vfsp, &vfsconf, vfc_list) {
1491                 if (vfsp->vfc_flags & VFCF_SYNTHETIC)
1492                         sbuf_printf(sb, "nodev");
1493                 sbuf_printf(sb, "\t%s\n", vfsp->vfc_name);
1494         }
1495         vfsconf_sunlock();
1496         return(0);
1497 }
1498
1499 /*
1500  * Filler function for proc/modules
1501  */
1502 static int
1503 linprocfs_domodules(PFS_FILL_ARGS)
1504 {
1505 #if 0
1506         struct linker_file *lf;
1507
1508         TAILQ_FOREACH(lf, &linker_files, link) {
1509                 sbuf_printf(sb, "%-20s%8lu%4d\n", lf->filename,
1510                     (unsigned long)lf->size, lf->refs);
1511         }
1512 #endif
1513         return (0);
1514 }
1515
1516 /*
1517  * Filler function for proc/pid/fd
1518  */
1519 static int
1520 linprocfs_dofdescfs(PFS_FILL_ARGS)
1521 {
1522
1523         if (p == curproc)
1524                 sbuf_printf(sb, "/dev/fd");
1525         else
1526                 sbuf_printf(sb, "unknown");
1527         return (0);
1528 }
1529
1530 /*
1531  * Filler function for proc/pid/limits
1532  */
1533 static const struct linux_rlimit_ident {
1534         const char      *desc;
1535         const char      *unit;
1536         unsigned int    rlim_id;
1537 } linux_rlimits_ident[] = {
1538         { "Max cpu time",       "seconds",      RLIMIT_CPU },
1539         { "Max file size",      "bytes",        RLIMIT_FSIZE },
1540         { "Max data size",      "bytes",        RLIMIT_DATA },
1541         { "Max stack size",     "bytes",        RLIMIT_STACK },
1542         { "Max core file size",  "bytes",       RLIMIT_CORE },
1543         { "Max resident set",   "bytes",        RLIMIT_RSS },
1544         { "Max processes",      "processes",    RLIMIT_NPROC },
1545         { "Max open files",     "files",        RLIMIT_NOFILE },
1546         { "Max locked memory",  "bytes",        RLIMIT_MEMLOCK },
1547         { "Max address space",  "bytes",        RLIMIT_AS },
1548         { "Max file locks",     "locks",        LINUX_RLIMIT_LOCKS },
1549         { "Max pending signals", "signals",     LINUX_RLIMIT_SIGPENDING },
1550         { "Max msgqueue size",  "bytes",        LINUX_RLIMIT_MSGQUEUE },
1551         { "Max nice priority",          "",     LINUX_RLIMIT_NICE },
1552         { "Max realtime priority",      "",     LINUX_RLIMIT_RTPRIO },
1553         { "Max realtime timeout",       "us",   LINUX_RLIMIT_RTTIME },
1554         { 0, 0, 0 }
1555 };
1556
1557 static int
1558 linprocfs_doproclimits(PFS_FILL_ARGS)
1559 {
1560         const struct linux_rlimit_ident *li;
1561         struct plimit *limp;
1562         struct rlimit rl;
1563         ssize_t size;
1564         int res, error;
1565
1566         error = 0;
1567
1568         PROC_LOCK(p);
1569         limp = lim_hold(p->p_limit);
1570         PROC_UNLOCK(p);
1571         size = sizeof(res);
1572         sbuf_printf(sb, "%-26s%-21s%-21s%-21s\n", "Limit", "Soft Limit",
1573                         "Hard Limit", "Units");
1574         for (li = linux_rlimits_ident; li->desc != NULL; ++li) {
1575                 switch (li->rlim_id)
1576                 {
1577                 case LINUX_RLIMIT_LOCKS:
1578                         /* FALLTHROUGH */
1579                 case LINUX_RLIMIT_RTTIME:
1580                         rl.rlim_cur = RLIM_INFINITY;
1581                         break;
1582                 case LINUX_RLIMIT_SIGPENDING:
1583                         error = kernel_sysctlbyname(td,
1584                             "kern.sigqueue.max_pending_per_proc",
1585                             &res, &size, 0, 0, 0, 0);
1586                         if (error != 0)
1587                                 goto out;
1588                         rl.rlim_cur = res;
1589                         rl.rlim_max = res;
1590                         break;
1591                 case LINUX_RLIMIT_MSGQUEUE:
1592                         error = kernel_sysctlbyname(td,
1593                             "kern.ipc.msgmnb", &res, &size, 0, 0, 0, 0);
1594                         if (error != 0)
1595                                 goto out;
1596                         rl.rlim_cur = res;
1597                         rl.rlim_max = res;
1598                         break;
1599                 case LINUX_RLIMIT_NICE:
1600                         /* FALLTHROUGH */
1601                 case LINUX_RLIMIT_RTPRIO:
1602                         rl.rlim_cur = 0;
1603                         rl.rlim_max = 0;
1604                         break;
1605                 default:
1606                         rl = limp->pl_rlimit[li->rlim_id];
1607                         break;
1608                 }
1609                 if (rl.rlim_cur == RLIM_INFINITY)
1610                         sbuf_printf(sb, "%-26s%-21s%-21s%-10s\n",
1611                             li->desc, "unlimited", "unlimited", li->unit);
1612                 else
1613                         sbuf_printf(sb, "%-26s%-21llu%-21llu%-10s\n",
1614                             li->desc, (unsigned long long)rl.rlim_cur,
1615                             (unsigned long long)rl.rlim_max, li->unit);
1616         }
1617 out:
1618         lim_free(limp);
1619         return (error);
1620 }
1621
1622 /*
1623  * The point of the following two functions is to work around
1624  * an assertion in Chromium; see kern/240991 for details.
1625  */
1626 static int
1627 linprocfs_dotaskattr(PFS_ATTR_ARGS)
1628 {
1629
1630         vap->va_nlink = 3;
1631         return (0);
1632 }
1633
1634 /*
1635  * Filler function for proc/<pid>/task/.dummy
1636  */
1637 static int
1638 linprocfs_dotaskdummy(PFS_FILL_ARGS)
1639 {
1640
1641         return (0);
1642 }
1643
1644 /*
1645  * Filler function for proc/sys/kernel/random/uuid
1646  */
1647 static int
1648 linprocfs_douuid(PFS_FILL_ARGS)
1649 {
1650         struct uuid uuid;
1651
1652         kern_uuidgen(&uuid, 1);
1653         sbuf_printf_uuid(sb, &uuid);
1654         sbuf_printf(sb, "\n");
1655         return(0);
1656 }
1657
1658 /*
1659  * Filler function for proc/pid/auxv
1660  */
1661 static int
1662 linprocfs_doauxv(PFS_FILL_ARGS)
1663 {
1664         struct sbuf *asb;
1665         off_t buflen, resid;
1666         int error;
1667
1668         /*
1669          * Mimic linux behavior and pass only processes with usermode
1670          * address space as valid. Return zero silently otherwise.
1671          */
1672         if (p->p_vmspace == &vmspace0)
1673                 return (0);
1674
1675         if (uio->uio_resid == 0)
1676                 return (0);
1677         if (uio->uio_offset < 0 || uio->uio_resid < 0)
1678                 return (EINVAL);
1679
1680         asb = sbuf_new_auto();
1681         if (asb == NULL)
1682                 return (ENOMEM);
1683         error = proc_getauxv(td, p, asb);
1684         if (error == 0)
1685                 error = sbuf_finish(asb);
1686
1687         resid = sbuf_len(asb) - uio->uio_offset;
1688         if (resid > uio->uio_resid)
1689                 buflen = uio->uio_resid;
1690         else
1691                 buflen = resid;
1692         if (buflen > IOSIZE_MAX)
1693                 return (EINVAL);
1694         if (buflen > MAXPHYS)
1695                 buflen = MAXPHYS;
1696         if (resid <= 0)
1697                 return (0);
1698
1699         if (error == 0)
1700                 error = uiomove(sbuf_data(asb) + uio->uio_offset, buflen, uio);
1701         sbuf_delete(asb);
1702         return (error);
1703 }
1704
1705 /*
1706  * Constructor
1707  */
1708 static int
1709 linprocfs_init(PFS_INIT_ARGS)
1710 {
1711         struct pfs_node *root;
1712         struct pfs_node *dir;
1713         struct pfs_node *sys;
1714
1715         root = pi->pi_root;
1716
1717         /* /proc/... */
1718         pfs_create_file(root, "cmdline", &linprocfs_docmdline,
1719             NULL, NULL, NULL, PFS_RD);
1720         pfs_create_file(root, "cpuinfo", &linprocfs_docpuinfo,
1721             NULL, NULL, NULL, PFS_RD);
1722         pfs_create_file(root, "devices", &linprocfs_dodevices,
1723             NULL, NULL, NULL, PFS_RD);
1724         pfs_create_file(root, "filesystems", &linprocfs_dofilesystems,
1725             NULL, NULL, NULL, PFS_RD);
1726         pfs_create_file(root, "loadavg", &linprocfs_doloadavg,
1727             NULL, NULL, NULL, PFS_RD);
1728         pfs_create_file(root, "meminfo", &linprocfs_domeminfo,
1729             NULL, NULL, NULL, PFS_RD);
1730         pfs_create_file(root, "modules", &linprocfs_domodules,
1731             NULL, NULL, NULL, PFS_RD);
1732         pfs_create_file(root, "mounts", &linprocfs_domtab,
1733             NULL, NULL, NULL, PFS_RD);
1734         pfs_create_file(root, "mtab", &linprocfs_domtab,
1735             NULL, NULL, NULL, PFS_RD);
1736         pfs_create_file(root, "partitions", &linprocfs_dopartitions,
1737             NULL, NULL, NULL, PFS_RD);
1738         pfs_create_link(root, "self", &procfs_docurproc,
1739             NULL, NULL, NULL, 0);
1740         pfs_create_file(root, "stat", &linprocfs_dostat,
1741             NULL, NULL, NULL, PFS_RD);
1742         pfs_create_file(root, "swaps", &linprocfs_doswaps,
1743             NULL, NULL, NULL, PFS_RD);
1744         pfs_create_file(root, "uptime", &linprocfs_douptime,
1745             NULL, NULL, NULL, PFS_RD);
1746         pfs_create_file(root, "version", &linprocfs_doversion,
1747             NULL, NULL, NULL, PFS_RD);
1748
1749         /* /proc/net/... */
1750         dir = pfs_create_dir(root, "net", NULL, NULL, NULL, 0);
1751         pfs_create_file(dir, "dev", &linprocfs_donetdev,
1752             NULL, NULL, NULL, PFS_RD);
1753
1754         /* /proc/<pid>/... */
1755         dir = pfs_create_dir(root, "pid", NULL, NULL, NULL, PFS_PROCDEP);
1756         pfs_create_file(dir, "cmdline", &linprocfs_doproccmdline,
1757             NULL, NULL, NULL, PFS_RD);
1758         pfs_create_link(dir, "cwd", &linprocfs_doproccwd,
1759             NULL, NULL, NULL, 0);
1760         pfs_create_file(dir, "environ", &linprocfs_doprocenviron,
1761             NULL, &procfs_candebug, NULL, PFS_RD);
1762         pfs_create_link(dir, "exe", &procfs_doprocfile,
1763             NULL, &procfs_notsystem, NULL, 0);
1764         pfs_create_file(dir, "maps", &linprocfs_doprocmaps,
1765             NULL, NULL, NULL, PFS_RD);
1766         pfs_create_file(dir, "mem", &procfs_doprocmem,
1767             procfs_attr_rw, &procfs_candebug, NULL, PFS_RDWR | PFS_RAW);
1768         pfs_create_file(dir, "mounts", &linprocfs_domtab,
1769             NULL, NULL, NULL, PFS_RD);
1770         pfs_create_link(dir, "root", &linprocfs_doprocroot,
1771             NULL, NULL, NULL, 0);
1772         pfs_create_file(dir, "stat", &linprocfs_doprocstat,
1773             NULL, NULL, NULL, PFS_RD);
1774         pfs_create_file(dir, "statm", &linprocfs_doprocstatm,
1775             NULL, NULL, NULL, PFS_RD);
1776         pfs_create_file(dir, "status", &linprocfs_doprocstatus,
1777             NULL, NULL, NULL, PFS_RD);
1778         pfs_create_link(dir, "fd", &linprocfs_dofdescfs,
1779             NULL, NULL, NULL, 0);
1780         pfs_create_file(dir, "auxv", &linprocfs_doauxv,
1781             NULL, &procfs_candebug, NULL, PFS_RD|PFS_RAWRD);
1782         pfs_create_file(dir, "limits", &linprocfs_doproclimits,
1783             NULL, NULL, NULL, PFS_RD);
1784
1785         /* /proc/<pid>/task/... */
1786         dir = pfs_create_dir(dir, "task", linprocfs_dotaskattr, NULL, NULL, 0);
1787         pfs_create_file(dir, ".dummy", &linprocfs_dotaskdummy,
1788             NULL, NULL, NULL, PFS_RD);
1789
1790         /* /proc/scsi/... */
1791         dir = pfs_create_dir(root, "scsi", NULL, NULL, NULL, 0);
1792         pfs_create_file(dir, "device_info", &linprocfs_doscsidevinfo,
1793             NULL, NULL, NULL, PFS_RD);
1794         pfs_create_file(dir, "scsi", &linprocfs_doscsiscsi,
1795             NULL, NULL, NULL, PFS_RD);
1796
1797         /* /proc/sys/... */
1798         sys = pfs_create_dir(root, "sys", NULL, NULL, NULL, 0);
1799         /* /proc/sys/kernel/... */
1800         dir = pfs_create_dir(sys, "kernel", NULL, NULL, NULL, 0);
1801         pfs_create_file(dir, "osrelease", &linprocfs_doosrelease,
1802             NULL, NULL, NULL, PFS_RD);
1803         pfs_create_file(dir, "ostype", &linprocfs_doostype,
1804             NULL, NULL, NULL, PFS_RD);
1805         pfs_create_file(dir, "version", &linprocfs_doosbuild,
1806             NULL, NULL, NULL, PFS_RD);
1807         pfs_create_file(dir, "msgmni", &linprocfs_domsgmni,
1808             NULL, NULL, NULL, PFS_RD);
1809         pfs_create_file(dir, "pid_max", &linprocfs_dopid_max,
1810             NULL, NULL, NULL, PFS_RD);
1811         pfs_create_file(dir, "sem", &linprocfs_dosem,
1812             NULL, NULL, NULL, PFS_RD);
1813
1814         /* /proc/sys/kernel/random/... */
1815         dir = pfs_create_dir(dir, "random", NULL, NULL, NULL, 0);
1816         pfs_create_file(dir, "uuid", &linprocfs_douuid,
1817             NULL, NULL, NULL, PFS_RD);
1818
1819         /* /proc/sys/vm/.... */
1820         dir = pfs_create_dir(sys, "vm", NULL, NULL, NULL, 0);
1821         pfs_create_file(dir, "min_free_kbytes", &linprocfs_dominfree,
1822             NULL, NULL, NULL, PFS_RD);
1823
1824         return (0);
1825 }
1826
1827 /*
1828  * Destructor
1829  */
1830 static int
1831 linprocfs_uninit(PFS_INIT_ARGS)
1832 {
1833
1834         /* nothing to do, pseudofs will GC */
1835         return (0);
1836 }
1837
1838 PSEUDOFS(linprocfs, 1, VFCF_JAIL);
1839 #if defined(__aarch64__) || defined(__amd64__)
1840 MODULE_DEPEND(linprocfs, linux_common, 1, 1, 1);
1841 #else
1842 MODULE_DEPEND(linprocfs, linux, 1, 1, 1);
1843 #endif
1844 MODULE_DEPEND(linprocfs, procfs, 1, 1, 1);
1845 MODULE_DEPEND(linprocfs, sysvmsg, 1, 1, 1);
1846 MODULE_DEPEND(linprocfs, sysvsem, 1, 1, 1);