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 "hammer.h"
  36 #include <libutil.h>
  37
  38 void    show_info(char *path);
  39 double  percent(int64_t value, int64_t total);
  40
  41 void
  42 hammer_cmd_info(void)
  43 {
  44         struct statfs *stfsbuf;
  45         int mntsize, i;
  46         char *fstype, *path;
  47
  48         tzset();
  49         mntsize = getmntinfo(&stfsbuf, MNT_NOWAIT);
  50         if (mntsize > 0) {
  51                 for (i=0; i < mntsize; i++) {
  52                         fstype = stfsbuf[i].f_fstypename;
  53                         path = stfsbuf[i].f_mntonname;
  54                         if ((strcmp(fstype, "hammer")) == 0)
  55                                 show_info(path);
  56                 }
  57         }
  58         else
  59                 fprintf(stdout, "No mounted filesystems found\n");
  60
  61 }
  62
  63 void show_info(char *path) {
  64
  65         int64_t usedbigblocks, bytes;
  66         struct  hammer_ioc_info info;
  67         char    buf[6];
  68         int     fd;
  69         char    *fsid, *fstype;
  70
  71         fsid = fstype = NULL;
  72         usedbigblocks = 0;
  73         bytes = 0;
  74
  75         bzero(&info, sizeof(struct hammer_ioc_info));
  76
  77         /* Try to get a file descriptor based on the path given */
  78         fd = open(path, O_RDONLY);
  79         if (fd < 0) {
  80                 perror("show_info");
  81                 exit(EXIT_FAILURE);
  82         }
  83
  84         if ((ioctl(fd, HAMMERIOC_GET_INFO, &info)) < 0) {
  85                 perror("show_info");
  86                 exit(EXIT_FAILURE);
  87         }
  88
  89         /* Find out the UUID strings */
  90         uuid_to_string(&info.vol_fsid, &fsid, NULL);
  91
  92         /* Volume information */
  93         fprintf(stdout, "Volume identification\n");
  94         fprintf(stdout, "\tLabel          %s\n", info.vol_name);
  95         fprintf(stdout, "\tNo. Volumes    %d\n", info.nvolumes);
  96         fprintf(stdout, "\tFSID           %s\n", fsid);
  97
  98         /* Big blocks information */
  99         usedbigblocks = info.bigblocks - info.freebigblocks;
 100
 101         fprintf(stdout, "Big block information\n");
 102         fprintf(stdout, "\tTotal\t       %jd\n", (intmax_t)info.bigblocks);
 103         fprintf(stdout, "\tUsed\t       %jd (%.2lf%%)\n\tReserved       "
 104                                        "%jd (%.2lf%%)\n\tFree\t       "
 105                                        "%jd (%.2lf%%)\n",
 106                         (intmax_t)usedbigblocks,
 107                         percent(usedbigblocks, info.bigblocks),
 108                         (intmax_t)info.rsvbigblocks,
 109                         percent(info.rsvbigblocks, info.bigblocks),
 110                         (intmax_t)(info.freebigblocks - info.rsvbigblocks),
 111                         percent(info.freebigblocks - info.rsvbigblocks,
 112                                 info.bigblocks));
 113         fprintf(stdout, "Space information\n");
 114
 115         /* Space information */
 116         bytes = (info.bigblocks << HAMMER_LARGEBLOCK_BITS);
 117         humanize_number(buf, sizeof(buf)  - (bytes < 0 ? 0 : 1), bytes, "", HN_AUTOSCALE, HN_DECIMAL | HN_NOSPACE | HN_B);
 118         fprintf(stdout, "\tTotal size     %6s (%jd bytes)\n",
 119                 buf, (intmax_t)bytes);
 120
 121         bytes = (usedbigblocks << HAMMER_LARGEBLOCK_BITS);
 122         humanize_number(buf, sizeof(buf)  - (bytes < 0 ? 0 : 1), bytes, "", HN_AUTOSCALE, HN_DECIMAL | HN_NOSPACE | HN_B);
 123         fprintf(stdout, "\tUsed space     %6s\n", buf);
 124
 125         bytes = (info.rsvbigblocks << HAMMER_LARGEBLOCK_BITS);
 126         humanize_number(buf, sizeof(buf)  - (bytes < 0 ? 0 : 1), bytes, "", HN_AUTOSCALE, HN_DECIMAL | HN_NOSPACE | HN_B);
 127         fprintf(stdout, "\tReserved space %6s\n", buf);
 128
 129         bytes = ((info.freebigblocks - info.rsvbigblocks) << HAMMER_LARGEBLOCK_BITS);
 130         humanize_number(buf, sizeof(buf)  - (bytes < 0 ? 0 : 1), bytes, "", HN_AUTOSCALE, HN_DECIMAL | HN_NOSPACE | HN_B);
 131         fprintf(stdout, "\tFree space     %6s\n\n", buf);
 132 }
 133
 134 double percent(int64_t value, int64_t total) {
 135
 136         /* Avoid divide-by-zero */
 137         if (value == 0)
 138                 value = 1;
 139
 140         return ((value * 100.0) / (double)total);
 141 }