sbin/hammer/cmd_info.c

   1 /*
   2  * Copyright (c) 2009 The DragonFly Project.  All rights reserved.
   3  *
   4  * This code is derived from software contributed to The DragonFly Project
   5  * by Antonio Huete <tuxillo@quantumachine.net>
   6  *
   7  * Redistribution and use in source and binary forms, with or without
   8  * modification, are permitted provided that the following conditions
   9  * are met:
  10  *
  11  * 1. Redistributions of source code must retain the above copyright
  12  *    notice, this list of conditions and the following disclaimer.
  13  * 2. Redistributions in binary form must reproduce the above copyright
  14  *    notice, this list of conditions and the following disclaimer in
  15  *    the documentation and/or other materials provided with the
  16  *    distribution.
  17  * 3. Neither the name of The DragonFly Project nor the names of its
  18  *    contributors may be used to endorse or promote products derived
  19  *    from this software without specific, prior written permission.
  20  *
  21  * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
  22  * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
  23  * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
  24  * FOR A PARTICULAR PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE
  25  * COPYRIGHT HOLDERS OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
  26  * INCIDENTAL, SPECIAL, EXEMPLARY OR CONSEQUENTIAL DAMAGES (INCLUDING,
  27  * BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
  28  * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED
  29  * AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
  30  * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT
  31  * OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
  32  * SUCH DAMAGE.
  33  *
  34  */
  35 #include <libhammer.h>
  36 #include <libutil.h>
  37
  38 #include "hammer.h"
  39
  40 void show_info(char *path);
  41 static double percent(int64_t value, int64_t total);
  42
  43 void
  44 hammer_cmd_info(void)
  45 {
  46         struct statfs *stfsbuf;
  47         int mntsize, i, first = 1;
  48         char *fstype, *path;
  49
  50         tzset();
  51         mntsize = getmntinfo(&stfsbuf, MNT_NOWAIT);
  52         if (mntsize > 0) {
  53                 for (i = 0; i < mntsize; i++) {
  54                         fstype = stfsbuf[i].f_fstypename;
  55                         path = stfsbuf[i].f_mntonname;
  56                         if ((strcmp(fstype, "hammer")) == 0) {
  57                                 if (first)
  58                                         first = 0;
  59                                 else
  60                                         fprintf(stdout, "\n");
  61                                 show_info(path);
  62                         }
  63                 }
  64         } else {
  65                 fprintf(stdout, "No mounted filesystems found\n");
  66         }
  67
  68 }
  69
  70 void
  71 show_info(char *path)
  72 {
  73         libhammer_volinfo_t hvi;
  74         libhammer_pfsinfo_t pi, pi_first;
  75         int64_t     usedbigblocks;
  76         int64_t     usedbytes, rsvbytes;
  77         int64_t     totalbytes, freebytes;
  78         char        *fsid;
  79         char        buf[6];
  80
  81         fsid = NULL;
  82         usedbigblocks = 0;
  83
  84         usedbytes = totalbytes = rsvbytes = freebytes = 0;
  85
  86         hvi = libhammer_get_volinfo(path);
  87         if (hvi == NULL) {
  88                 perror("libhammer_get_volinfo");
  89                 exit(EXIT_FAILURE);
  90         }
  91
  92         /* Find out the UUID strings */
  93         uuid_to_string(&hvi->vol_fsid, &fsid, NULL);
  94
  95         /* Volume information */
  96         fprintf(stdout, "Volume identification\n");
  97         fprintf(stdout, "\tLabel               %s\n", hvi->vol_name);
  98         fprintf(stdout, "\tNo. Volumes         %d\n", hvi->nvolumes);
  99         fprintf(stdout, "\tFSID                %s\n", fsid);
 100         fprintf(stdout, "\tHAMMER Version      %d\n", hvi->version);
 101
 102         /* Big blocks information */
 103         usedbigblocks = hvi->bigblocks - hvi->freebigblocks;
 104
 105         fprintf(stdout, "Big block information\n");
 106         fprintf(stdout, "\tTotal      %10jd\n", (intmax_t)hvi->bigblocks);
 107         fprintf(stdout, "\tUsed       %10jd (%.2lf%%)\n"
 108                         "\tReserved   %10jd (%.2lf%%)\n"
 109                         "\tFree       %10jd (%.2lf%%)\n",
 110                         (intmax_t)usedbigblocks,
 111                         percent(usedbigblocks, hvi->bigblocks),
 112                         (intmax_t)hvi->rsvbigblocks,
 113                         percent(hvi->rsvbigblocks, hvi->bigblocks),
 114                         (intmax_t)(hvi->freebigblocks - hvi->rsvbigblocks),
 115                         percent(hvi->freebigblocks - hvi->rsvbigblocks,
 116                                 hvi->bigblocks));
 117         fprintf(stdout, "Space information\n");
 118
 119         /* Space information */
 120         totalbytes = (hvi->bigblocks << HAMMER_LARGEBLOCK_BITS);
 121         usedbytes = (usedbigblocks << HAMMER_LARGEBLOCK_BITS);
 122         rsvbytes = (hvi->rsvbigblocks << HAMMER_LARGEBLOCK_BITS);
 123         freebytes = ((hvi->freebigblocks - hvi->rsvbigblocks)
 124             << HAMMER_LARGEBLOCK_BITS);
 125
 126         fprintf(stdout, "\tNo. Inodes %10jd\n", (intmax_t)hvi->inodes);
 127         humanize_number(buf, sizeof(buf)  - (totalbytes < 0 ? 0 : 1),
 128             totalbytes, "", HN_AUTOSCALE, HN_DECIMAL | HN_NOSPACE | HN_B);
 129         fprintf(stdout, "\tTotal size     %6s (%jd bytes)\n",
 130             buf, (intmax_t)totalbytes);
 131
 132         humanize_number(buf, sizeof(buf)  - (usedbytes < 0 ? 0 : 1),
 133             usedbytes, "", HN_AUTOSCALE, HN_DECIMAL | HN_NOSPACE | HN_B);
 134         fprintf(stdout, "\tUsed           %6s (%.2lf%%)\n", buf,
 135             percent(usedbytes, totalbytes));
 136
 137         humanize_number(buf, sizeof(buf)  - (rsvbytes < 0 ? 0 : 1),
 138             rsvbytes, "", HN_AUTOSCALE, HN_DECIMAL | HN_NOSPACE | HN_B);
 139         fprintf(stdout, "\tReserved       %6s (%.2lf%%)\n", buf,
 140             percent(rsvbytes, totalbytes));
 141
 142         humanize_number(buf, sizeof(buf)  - (freebytes < 0 ? 0 : 1),
 143             freebytes, "", HN_AUTOSCALE, HN_DECIMAL | HN_NOSPACE | HN_B);
 144         fprintf(stdout, "\tFree           %6s (%.2lf%%)\n", buf,
 145             percent(freebytes, totalbytes));
 146
 147         /* Pseudo-filesystem information */
 148         fprintf(stdout, "PFS information\n");
 149         fprintf(stdout, "\tPFS ID  Mode    Snaps  Mounted on\n");
 150
 151         /* Iterate all the PFSs found */
 152         pi_first = libhammer_get_first_pfs(hvi);
 153         for (pi = pi_first; pi != NULL; pi = libhammer_get_next_pfs(pi)) {
 154                 fprintf(stdout, "\t%6d  %-6s",
 155                     pi->pfs_id, (pi->ismaster ? "MASTER" : "SLAVE"));
 156
 157                 snprintf(buf, 6, "%d", pi->snapcount);
 158                 fprintf(stdout, " %6s  ", (pi->head.error && pi->snapcount == 0) ? "-" : buf);
 159
 160                 if (pi->mountedon)
 161                         fprintf(stdout, "%s", pi->mountedon);
 162                 else
 163                         fprintf(stdout, "not mounted");
 164
 165                 fprintf(stdout, "\n");
 166         }
 167
 168         free(fsid);
 169
 170         libhammer_free_volinfo(hvi);
 171
 172 }
 173
 174 static double
 175 percent(int64_t value, int64_t total)
 176 {
 177         /* Avoid divide-by-zero */
 178         if (total == 0)
 179                 return 100.0;
 180
 181         return ((value * 100.0) / (double)total);
 182 }