lib/lib_vty.c

   1 /*
   2  * Assorted library VTY commands
   3  *
   4  * Copyright (C) 1998 Kunihiro Ishiguro
   5  * Copyright (C) 2016-2017  David Lamparter for NetDEF, Inc.
   6  *
   7  * This program is free software; you can redistribute it and/or modify it
   8  * under the terms of the GNU General Public License as published by the Free
   9  * Software Foundation; either version 2 of the License, or (at your option)
  10  * any later version.
  11  *
  12  * This program is distributed in the hope that it will be useful, but WITHOUT
  13  * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
  14  * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License for
  15  * more details.
  16  *
  17  * You should have received a copy of the GNU General Public License along
  18  * with this program; see the file COPYING; if not, write to the Free Software
  19  * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
  20  */
  21
  22 #include <zebra.h>
  23 /* malloc.h is generally obsolete, however GNU Libc mallinfo wants it. */
  24 #ifdef HAVE_MALLOC_H
  25 #include <malloc.h>
  26 #endif
  27 #ifdef HAVE_MALLOC_MALLOC_H
  28 #include <malloc/malloc.h>
  29 #endif
  30 #include <dlfcn.h>
  31 #ifdef HAVE_LINK_H
  32 #include <link.h>
  33 #endif
  34
  35 #include "log.h"
  36 #include "memory.h"
  37 #include "module.h"
  38 #include "defaults.h"
  39 #include "lib_vty.h"
  40
  41 /* Looking up memory status from vty interface. */
  42 #include "vector.h"
  43 #include "vty.h"
  44 #include "command.h"
  45
  46 #ifdef HAVE_MALLINFO
  47 static int show_memory_mallinfo(struct vty *vty)
  48 {
  49         struct mallinfo minfo = mallinfo();
  50         char buf[MTYPE_MEMSTR_LEN];
  51
  52         vty_out(vty, "System allocator statistics:\n");
  53         vty_out(vty, "  Total heap allocated:  %s\n",
  54                 mtype_memstr(buf, MTYPE_MEMSTR_LEN, minfo.arena));
  55         vty_out(vty, "  Holding block headers: %s\n",
  56                 mtype_memstr(buf, MTYPE_MEMSTR_LEN, minfo.hblkhd));
  57         vty_out(vty, "  Used small blocks:     %s\n",
  58                 mtype_memstr(buf, MTYPE_MEMSTR_LEN, minfo.usmblks));
  59         vty_out(vty, "  Used ordinary blocks:  %s\n",
  60                 mtype_memstr(buf, MTYPE_MEMSTR_LEN, minfo.uordblks));
  61         vty_out(vty, "  Free small blocks:     %s\n",
  62                 mtype_memstr(buf, MTYPE_MEMSTR_LEN, minfo.fsmblks));
  63         vty_out(vty, "  Free ordinary blocks:  %s\n",
  64                 mtype_memstr(buf, MTYPE_MEMSTR_LEN, minfo.fordblks));
  65         vty_out(vty, "  Ordinary blocks:       %ld\n",
  66                 (unsigned long)minfo.ordblks);
  67         vty_out(vty, "  Small blocks:          %ld\n",
  68                 (unsigned long)minfo.smblks);
  69         vty_out(vty, "  Holding blocks:        %ld\n",
  70                 (unsigned long)minfo.hblks);
  71         vty_out(vty, "(see system documentation for 'mallinfo' for meaning)\n");
  72         return 1;
  73 }
  74 #endif /* HAVE_MALLINFO */
  75
  76 static int qmem_walker(void *arg, struct memgroup *mg, struct memtype *mt)
  77 {
  78         struct vty *vty = arg;
  79         if (!mt) {
  80                 vty_out(vty, "--- qmem %s ---\n", mg->name);
  81                 vty_out(vty, "%-30s: %8s %-8s%s %8s %9s\n",
  82                         "Type", "Current#", "  Size",
  83 #ifdef HAVE_MALLOC_USABLE_SIZE
  84                         "     Total",
  85 #else
  86                         "",
  87 #endif
  88                         "Max#",
  89 #ifdef HAVE_MALLOC_USABLE_SIZE
  90                         "MaxBytes"
  91 #else
  92                         ""
  93 #endif
  94                         );
  95         } else {
  96                 if (mt->n_alloc != 0) {
  97                         char size[32];
  98                         snprintf(size, sizeof(size), "%6zu", mt->size);
  99 #ifdef HAVE_MALLOC_USABLE_SIZE
 100 #define TSTR " %9zu"
 101 #define TARG , mt->total
 102 #define TARG2 , mt->max_size
 103 #else
 104 #define TSTR ""
 105 #define TARG
 106 #define TARG2
 107 #endif
 108                         vty_out(vty, "%-30s: %8zu %-8s"TSTR" %8zu"TSTR"\n",
 109                                 mt->name,
 110                                 mt->n_alloc,
 111                                 mt->size == 0 ? ""
 112                                               : mt->size == SIZE_VAR
 113                                                         ? "variable"
 114                                                         : size
 115                                 TARG,
 116                                 mt->n_max
 117                                 TARG2);
 118                 }
 119         }
 120         return 0;
 121 }
 122
 123
 124 DEFUN_NOSH (show_memory,
 125             show_memory_cmd,
 126             "show memory",
 127             "Show running system information\n"
 128             "Memory statistics\n")
 129 {
 130 #ifdef HAVE_MALLINFO
 131         show_memory_mallinfo(vty);
 132 #endif /* HAVE_MALLINFO */
 133
 134         qmem_walk(qmem_walker, vty);
 135         return CMD_SUCCESS;
 136 }
 137
 138 DEFUN_NOSH (show_modules,
 139             show_modules_cmd,
 140             "show modules",
 141             "Show running system information\n"
 142             "Loaded modules\n")
 143 {
 144         struct frrmod_runtime *plug = frrmod_list;
 145
 146         vty_out(vty, "%-12s %-25s %s\n\n", "Module Name", "Version",
 147                 "Description");
 148         while (plug) {
 149                 const struct frrmod_info *i = plug->info;
 150
 151                 vty_out(vty, "%-12s %-25s %s\n", i->name, i->version,
 152                         i->description);
 153                 if (plug->dl_handle) {
 154 #ifdef HAVE_DLINFO_ORIGIN
 155                         char origin[MAXPATHLEN] = "";
 156                         dlinfo(plug->dl_handle, RTLD_DI_ORIGIN, &origin);
 157 #ifdef HAVE_DLINFO_LINKMAP
 158                         const char *name;
 159                         struct link_map *lm = NULL;
 160                         dlinfo(plug->dl_handle, RTLD_DI_LINKMAP, &lm);
 161                         if (lm) {
 162                                 name = strrchr(lm->l_name, '/');
 163                                 name = name ? name + 1 : lm->l_name;
 164                                 vty_out(vty, "\tfrom: %s/%s\n", origin, name);
 165                         }
 166 #else
 167                         vty_out(vty, "\tfrom: %s \n", origin, plug->load_name);
 168 #endif
 169 #else
 170                         vty_out(vty, "\tfrom: %s\n", plug->load_name);
 171 #endif
 172                 }
 173                 plug = plug->next;
 174         }
 175
 176         vty_out(vty, "pid: %u\n", (uint32_t)(getpid()));
 177
 178         return CMD_SUCCESS;
 179 }
 180
 181 DEFUN (frr_defaults,
 182        frr_defaults_cmd,
 183        "frr defaults PROFILE...",
 184        "FRRouting global parameters\n"
 185        "set of configuration defaults used\n"
 186        "profile string\n")
 187 {
 188         char *profile = argv_concat(argv, argc, 2);
 189         int rv = CMD_SUCCESS;
 190
 191         if (!frr_defaults_profile_valid(profile)) {
 192                 vty_out(vty, "%% WARNING: profile %s is not known in this version\n",
 193                         profile);
 194                 rv = CMD_WARNING;
 195         }
 196         frr_defaults_profile_set(profile);
 197         XFREE(MTYPE_TMP, profile);
 198         return rv;
 199 }
 200
 201 DEFUN (frr_version,
 202        frr_version_cmd,
 203        "frr version VERSION...",
 204        "FRRouting global parameters\n"
 205        "version configuration was written by\n"
 206        "version string\n")
 207 {
 208         char *version = argv_concat(argv, argc, 2);
 209
 210         frr_defaults_version_set(version);
 211         XFREE(MTYPE_TMP, version);
 212         return CMD_SUCCESS;
 213 }
 214
 215 static void defaults_autocomplete(vector comps, struct cmd_token *token)
 216 {
 217         const char **p;
 218
 219         for (p = frr_defaults_profiles; *p; p++)
 220                 vector_set(comps, XSTRDUP(MTYPE_COMPLETION, *p));
 221 }
 222
 223 static const struct cmd_variable_handler default_var_handlers[] = {
 224         {.tokenname = "PROFILE", .completions = defaults_autocomplete},
 225         {.completions = NULL},
 226 };
 227
 228 void lib_cmd_init(void)
 229 {
 230         cmd_variable_handler_register(default_var_handlers);
 231
 232         install_element(CONFIG_NODE, &frr_defaults_cmd);
 233         install_element(CONFIG_NODE, &frr_version_cmd);
 234
 235         install_element(VIEW_NODE, &show_memory_cmd);
 236         install_element(VIEW_NODE, &show_modules_cmd);
 237 }
 238
 239 /* Stats querying from users */
 240 /* Return a pointer to a human friendly string describing
 241  * the byte count passed in. E.g:
 242  * "0 bytes", "2048 bytes", "110kB", "500MiB", "11GiB", etc.
 243  * Up to 4 significant figures will be given.
 244  * The pointer returned may be NULL (indicating an error)
 245  * or point to the given buffer, or point to static storage.
 246  */
 247 const char *mtype_memstr(char *buf, size_t len, unsigned long bytes)
 248 {
 249         unsigned int m, k;
 250
 251         /* easy cases */
 252         if (!bytes)
 253                 return "0 bytes";
 254         if (bytes == 1)
 255                 return "1 byte";
 256
 257         /*
 258          * When we pass the 2gb barrier mallinfo() can no longer report
 259          * correct data so it just does something odd...
 260          * Reporting like Terrabytes of data.  Which makes users...
 261          * edgy.. yes edgy that's the term for it.
 262          * So let's just give up gracefully
 263          */
 264         if (bytes > 0x7fffffff)
 265                 return "> 2GB";
 266
 267         m = bytes >> 20;
 268         k = bytes >> 10;
 269
 270         if (m > 10) {
 271                 if (bytes & (1 << 19))
 272                         m++;
 273                 snprintf(buf, len, "%d MiB", m);
 274         } else if (k > 10) {
 275                 if (bytes & (1 << 9))
 276                         k++;
 277                 snprintf(buf, len, "%d KiB", k);
 278         } else
 279                 snprintf(buf, len, "%ld bytes", bytes);
 280
 281         return buf;
 282 }