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         int         error;
  79         char        *fsid;
  80         char        buf[6];
  81         u_int32_t   sc;
  82
  83         fsid = NULL;
  84         usedbigblocks = 0;
  85
  86         usedbytes = totalbytes = rsvbytes = freebytes = 0;
  87         sc = error = 0;
  88
  89         hvi = libhammer_get_volinfo(path);
  90         if (hvi == NULL) {
  91                 perror("libhammer_get_volinfo");
  92                 exit(EXIT_FAILURE);
  93         }
  94
  95         /* Find out the UUID strings */
  96         uuid_to_string(&hvi->vol_fsid, &fsid, NULL);
  97
  98         /* Volume information */
  99         fprintf(stdout, "Volume identification\n");
 100         fprintf(stdout, "\tLabel               %s\n", hvi->vol_name);
 101         fprintf(stdout, "\tNo. Volumes         %d\n", hvi->nvolumes);
 102         fprintf(stdout, "\tFSID                %s\n", fsid);
 103         fprintf(stdout, "\tHAMMER Version      %d\n", hvi->version);
 104
 105         /* Big blocks information */
 106         usedbigblocks = hvi->bigblocks - hvi->freebigblocks;
 107
 108         fprintf(stdout, "Big block information\n");
 109         fprintf(stdout, "\tTotal      %10jd\n", (intmax_t)hvi->bigblocks);
 110         fprintf(stdout, "\tUsed       %10jd (%.2lf%%)\n"
 111                         "\tReserved   %10jd (%.2lf%%)\n"
 112                         "\tFree       %10jd (%.2lf%%)\n",
 113                         (intmax_t)usedbigblocks,
 114                         percent(usedbigblocks, hvi->bigblocks),
 115                         (intmax_t)hvi->rsvbigblocks,
 116                         percent(hvi->rsvbigblocks, hvi->bigblocks),
 117                         (intmax_t)(hvi->freebigblocks - hvi->rsvbigblocks),
 118                         percent(hvi->freebigblocks - hvi->rsvbigblocks,
 119                                 hvi->bigblocks));
 120         fprintf(stdout, "Space information\n");
 121
 122         /* Space information */
 123         totalbytes = (hvi->bigblocks << HAMMER_LARGEBLOCK_BITS);
 124         usedbytes = (usedbigblocks << HAMMER_LARGEBLOCK_BITS);
 125         rsvbytes = (hvi->rsvbigblocks << HAMMER_LARGEBLOCK_BITS);
 126         freebytes = ((hvi->freebigblocks - hvi->rsvbigblocks)
 127             << HAMMER_LARGEBLOCK_BITS);
 128
 129         fprintf(stdout, "\tNo. Inodes %10jd\n", (intmax_t)hvi->inodes);
 130         humanize_number(buf, sizeof(buf)  - (totalbytes < 0 ? 0 : 1),
 131             totalbytes, "", HN_AUTOSCALE, HN_DECIMAL | HN_NOSPACE | HN_B);
 132         fprintf(stdout, "\tTotal size     %6s (%jd bytes)\n",
 133             buf, (intmax_t)totalbytes);
 134
 135         humanize_number(buf, sizeof(buf)  - (usedbytes < 0 ? 0 : 1),
 136             usedbytes, "", HN_AUTOSCALE, HN_DECIMAL | HN_NOSPACE | HN_B);
 137         fprintf(stdout, "\tUsed           %6s (%.2lf%%)\n", buf,
 138             percent(usedbytes, totalbytes));
 139
 140         humanize_number(buf, sizeof(buf)  - (rsvbytes < 0 ? 0 : 1),
 141             rsvbytes, "", HN_AUTOSCALE, HN_DECIMAL | HN_NOSPACE | HN_B);
 142         fprintf(stdout, "\tReserved       %6s (%.2lf%%)\n", buf,
 143             percent(rsvbytes, totalbytes));
 144
 145         humanize_number(buf, sizeof(buf)  - (freebytes < 0 ? 0 : 1),
 146             freebytes, "", HN_AUTOSCALE, HN_DECIMAL | HN_NOSPACE | HN_B);
 147         fprintf(stdout, "\tFree           %6s (%.2lf%%)\n", buf,
 148             percent(freebytes, totalbytes));
 149
 150         /* Pseudo-filesystem information */
 151         fprintf(stdout, "PFS information\n");
 152         fprintf(stdout, "\tPFS ID  Mode    Snaps  Mounted on\n");
 153
 154         /* Iterate all the PFSs found */
 155         pi_first = libhammer_get_first_pfs(hvi);
 156         for (pi = pi_first; pi != NULL; pi = libhammer_get_next_pfs(pi)) {
 157                 fprintf(stdout, "\t%6d  %-6s",
 158                     pi->pfs_id, (pi->ismaster ? "MASTER" : "SLAVE"));
 159
 160                 snprintf(buf, 6, "%d", pi->snapcount);
 161                 fprintf(stdout, " %6s  ", (pi->head.error && pi->snapcount == 0) ? "-" : buf);
 162
 163                 if (pi->mountedon)
 164                         fprintf(stdout, "%s", pi->mountedon);
 165                 else
 166                         fprintf(stdout, "not mounted");
 167
 168                 fprintf(stdout, "\n");
 169         }
 170
 171         free(fsid);
 172
 173         libhammer_free_volinfo(hvi);
 174
 175 }
 176
 177 static double
 178 percent(int64_t value, int64_t total)
 179 {
 180         /* Avoid divide-by-zero */
 181         if (total == 0)
 182                 return 100.0;
 183
 184         return ((value * 100.0) / (double)total);
 185 }