sbin/hammer/cmd_info.c

   1 /*
   2  * Copyright (c) 2009 The DragonFly Project.  All rights reserved.
   3  *
   4  * Redistribution and use in source and binary forms, with or without
   5  * modification, are permitted provided that the following conditions
   6  * are met:
   7  *
   8  * 1. Redistributions of source code must retain the above copyright
   9  *    notice, this list of conditions and the following disclaimer.
  10  * 2. Redistributions in binary form must reproduce the above copyright
  11  *    notice, this list of conditions and the following disclaimer in
  12  *    the documentation and/or other materials provided with the
  13  *    distribution.
  14  * 3. Neither the name of The DragonFly Project nor the names of its
  15  *    contributors may be used to endorse or promote products derived
  16  *    from this software without specific, prior written permission.
  17  *
  18  * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
  19  * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
  20  * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
  21  * FOR A PARTICULAR PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE
  22  * COPYRIGHT HOLDERS OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
  23  * INCIDENTAL, SPECIAL, EXEMPLARY OR CONSEQUENTIAL DAMAGES (INCLUDING,
  24  * BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
  25  * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED
  26  * AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
  27  * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT
  28  * OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
  29  * SUCH DAMAGE.
  30  *
  31  */
  32 #include "hammer.h"
  33 #include <libutil.h>
  34
  35 void    show_info(char *path);
  36 int     percent(int64_t value, int64_t total);
  37
  38 #define WS      " \t\r\n"
  39
  40 void
  41 hammer_cmd_info(int ac)
  42 {
  43         FILE *fp;
  44         char *fs, *ptr, *path;
  45         char buf[256];
  46
  47         tzset();
  48         if (ac == 0) {
  49                 fp = popen("/sbin/mount -t hammer", "r");
  50                 if (fp == NULL)
  51                         errx(1, "hammer info: 'mount' failed");
  52                 while (fgets(buf, sizeof(buf), fp) != NULL) {
  53                         fs = strtok(buf, WS);
  54                         if (fs == NULL)
  55                                 continue;
  56                         ptr = strtok(NULL, WS);
  57                         if (ptr == NULL)
  58                                 continue;
  59                         path = strtok(NULL, WS);
  60                         if (path == NULL)
  61                                 continue;
  62                         ptr = strtok(NULL, WS);
  63                         if (ptr == NULL)
  64                                 continue;
  65                         if ((strncmp(ptr, "(hammer,", 8) == 0))
  66                                 show_info(path);
  67                 }
  68                 fclose(fp);
  69         }
  70 }
  71
  72 void show_info(char *path) {
  73
  74         int64_t usedbigblocks = 0, bytes = 0;
  75         struct  hammer_ioc_info info;
  76         char    buf[6];
  77         int     fd;
  78         char    *fsid, *fstype;
  79
  80         fsid = fstype = NULL;
  81
  82         bzero(&info, sizeof(struct hammer_ioc_info));
  83
  84         /* Try to get a file descriptor based on the path given */
  85         fd = open(path, O_RDONLY);
  86         if (fd < 0) {
  87                 perror("show_info");
  88                 exit(EXIT_FAILURE);
  89         }
  90
  91         if ((ioctl(fd, HAMMERIOC_GET_INFO, &info)) < 0) {
  92                 perror("show_info");
  93                 exit(EXIT_FAILURE);
  94         }
  95
  96         /* Find out the UUID strings */
  97         uuid_to_string(&info.vol_fsid, &fsid, NULL);
  98
  99         /* Volume information */
 100         fprintf(stdout, "Volume identification\n");
 101         fprintf(stdout, "\tLabel          %s\n", info.vol_name);
 102         fprintf(stdout, "\tNo. Volumes    %d\n", info.nvolumes);
 103         fprintf(stdout, "\tFSID           %s\n", fsid);
 104
 105         /* Big blocks information */
 106         usedbigblocks = info.bigblocks - info.freebigblocks;
 107
 108         fprintf(stdout, "Big block information\n");
 109         fprintf(stdout, "\tTotal\t       %lld\n", info.bigblocks);
 110         fprintf(stdout, "\tUsed\t       %lld (%d%%)\n\tReserved       %lld (%d%%)\n\tFree\t       %lld (%d%%)\n",
 111                         usedbigblocks, percent(usedbigblocks, info.bigblocks),
 112                         info.rsvbigblocks, percent(info.rsvbigblocks, info.bigblocks),
 113                         (info.freebigblocks - info.rsvbigblocks),
 114                         percent(info.freebigblocks - info.rsvbigblocks, info.bigblocks));
 115         fprintf(stdout, "Space information\n");
 116
 117         /* Space information */
 118         bytes = (info.bigblocks << HAMMER_LARGEBLOCK_BITS);
 119         humanize_number(buf, sizeof(buf)  - (bytes < 0 ? 0 : 1), bytes, "", HN_AUTOSCALE, HN_DECIMAL | HN_NOSPACE | HN_B);
 120         fprintf(stdout, "\tTotal size     %6s (%lld bytes)\n", buf, bytes);
 121
 122         bytes = (usedbigblocks << HAMMER_LARGEBLOCK_BITS);
 123         humanize_number(buf, sizeof(buf)  - (bytes < 0 ? 0 : 1), bytes, "", HN_AUTOSCALE, HN_DECIMAL | HN_NOSPACE | HN_B);
 124         fprintf(stdout, "\tUsed space     %6s\n", buf);
 125
 126         bytes = (info.rsvbigblocks << HAMMER_LARGEBLOCK_BITS);
 127         humanize_number(buf, sizeof(buf)  - (bytes < 0 ? 0 : 1), bytes, "", HN_AUTOSCALE, HN_DECIMAL | HN_NOSPACE | HN_B);
 128         fprintf(stdout, "\tReserved space %6s\n", buf);
 129
 130         bytes = ((info.freebigblocks - info.rsvbigblocks) << HAMMER_LARGEBLOCK_BITS);
 131         humanize_number(buf, sizeof(buf)  - (bytes < 0 ? 0 : 1), bytes, "", HN_AUTOSCALE, HN_DECIMAL | HN_NOSPACE | HN_B);
 132         fprintf(stdout, "\tFree space     %6s\n\n", buf);
 133 }
 134
 135 int percent(int64_t value, int64_t total) {
 136
 137         /* Avoid divide-by-zero */
 138         if (value == 0)
 139                 value = 1;
 140
 141         return ((value * 100) / total);
 142 }