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
  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(char **av, int ac)
  45 {
  46         struct statfs *stfsbuf;
  47         int mntsize, i, first = 1;
  48         char *fstype, *path;
  49
  50         tzset();
  51
  52         if (ac > 0) {
  53                 while (ac) {
  54                         show_info(*av);
  55                         --ac;
  56                         ++av;
  57                 }
  58         } else {
  59                 mntsize = getmntinfo(&stfsbuf, MNT_NOWAIT);
  60                 if (mntsize > 0) {
  61                         for (i = 0; i < mntsize; i++) {
  62                                 fstype = stfsbuf[i].f_fstypename;
  63                                 path = stfsbuf[i].f_mntonname;
  64                                 if ((strcmp(fstype, "hammer")) == 0) {
  65                                         if (first)
  66                                                 first = 0;
  67                                         else
  68                                                 fprintf(stdout, "\n");
  69                                         show_info(path);
  70                                 }
  71                         }
  72                 } else {
  73                         fprintf(stdout, "No mounted filesystems found\n");
  74                 }
  75         }
  76 }
  77
  78 void
  79 show_info(char *path)
  80 {
  81         libhammer_fsinfo_t fip;
  82         libhammer_pfsinfo_t pi, pi_first;
  83         int64_t     usedbigblocks;
  84         int64_t     usedbytes, rsvbytes;
  85         int64_t     totalbytes, freebytes;
  86         char        *fsid;
  87         char        buf[6];
  88
  89         fsid = NULL;
  90         usedbigblocks = 0;
  91
  92         usedbytes = totalbytes = rsvbytes = freebytes = 0;
  93
  94         fip = libhammer_get_fsinfo(path);
  95         if (fip == NULL) {
  96                 perror("libhammer_get_fsinfo");
  97                 exit(EXIT_FAILURE);
  98         }
  99
 100         /* Find out the UUID strings */
 101         uuid_to_string(&fip->vol_fsid, &fsid, NULL);
 102
 103         /* Volume information */
 104         fprintf(stdout, "Volume identification\n");
 105         fprintf(stdout, "\tLabel               %s\n", fip->vol_name);
 106         fprintf(stdout, "\tNo. Volumes         %d\n", fip->nvolumes);
 107         fprintf(stdout, "\tFSID                %s\n", fsid);
 108         fprintf(stdout, "\tHAMMER Version      %d\n", fip->version);
 109
 110         /* Big blocks information */
 111         usedbigblocks = fip->bigblocks - fip->freebigblocks;
 112
 113         fprintf(stdout, "Big block information\n");
 114         fprintf(stdout, "\tTotal      %10jd\n", (intmax_t)fip->bigblocks);
 115         fprintf(stdout, "\tUsed       %10jd (%.2lf%%)\n"
 116                         "\tReserved   %10jd (%.2lf%%)\n"
 117                         "\tFree       %10jd (%.2lf%%)\n",
 118                         (intmax_t)usedbigblocks,
 119                         percent(usedbigblocks, fip->bigblocks),
 120                         (intmax_t)fip->rsvbigblocks,
 121                         percent(fip->rsvbigblocks, fip->bigblocks),
 122                         (intmax_t)(fip->freebigblocks - fip->rsvbigblocks),
 123                         percent(fip->freebigblocks - fip->rsvbigblocks,
 124                                 fip->bigblocks));
 125         fprintf(stdout, "Space information\n");
 126
 127         /* Space information */
 128         totalbytes = (fip->bigblocks << HAMMER_BIGBLOCK_BITS);
 129         usedbytes = (usedbigblocks << HAMMER_BIGBLOCK_BITS);
 130         rsvbytes = (fip->rsvbigblocks << HAMMER_BIGBLOCK_BITS);
 131         freebytes = ((fip->freebigblocks - fip->rsvbigblocks)
 132             << HAMMER_BIGBLOCK_BITS);
 133
 134         fprintf(stdout, "\tNo. Inodes %10jd\n", (intmax_t)fip->inodes);
 135         humanize_number(buf, sizeof(buf)  - (totalbytes < 0 ? 0 : 1),
 136             totalbytes, "", HN_AUTOSCALE, HN_DECIMAL | HN_NOSPACE | HN_B);
 137         fprintf(stdout, "\tTotal size     %6s (%jd bytes)\n",
 138             buf, (intmax_t)totalbytes);
 139
 140         humanize_number(buf, sizeof(buf)  - (usedbytes < 0 ? 0 : 1),
 141             usedbytes, "", HN_AUTOSCALE, HN_DECIMAL | HN_NOSPACE | HN_B);
 142         fprintf(stdout, "\tUsed           %6s (%.2lf%%)\n", buf,
 143             percent(usedbytes, totalbytes));
 144
 145         humanize_number(buf, sizeof(buf)  - (rsvbytes < 0 ? 0 : 1),
 146             rsvbytes, "", HN_AUTOSCALE, HN_DECIMAL | HN_NOSPACE | HN_B);
 147         fprintf(stdout, "\tReserved       %6s (%.2lf%%)\n", buf,
 148             percent(rsvbytes, totalbytes));
 149
 150         humanize_number(buf, sizeof(buf)  - (freebytes < 0 ? 0 : 1),
 151             freebytes, "", HN_AUTOSCALE, HN_DECIMAL | HN_NOSPACE | HN_B);
 152         fprintf(stdout, "\tFree           %6s (%.2lf%%)\n", buf,
 153             percent(freebytes, totalbytes));
 154
 155         /* Pseudo-filesystem information */
 156         fprintf(stdout, "PFS information\n");
 157         fprintf(stdout, "\tPFS ID  Mode    Snaps  Mounted on\n");
 158
 159         /* Iterate all the PFSs found */
 160         pi_first = libhammer_get_first_pfs(fip);
 161         for (pi = pi_first; pi != NULL; pi = libhammer_get_next_pfs(pi)) {
 162                 fprintf(stdout, "\t%6d  %-6s",
 163                     pi->pfs_id, (pi->ismaster ? "MASTER" : "SLAVE"));
 164
 165                 snprintf(buf, 6, "%d", pi->snapcount);
 166                 fprintf(stdout, " %6s  ", (pi->head.error && pi->snapcount == 0) ? "-" : buf);
 167
 168                 if (pi->mountedon)
 169                         fprintf(stdout, "%s", pi->mountedon);
 170                 else
 171                         fprintf(stdout, "not mounted");
 172
 173                 fprintf(stdout, "\n");
 174         }
 175
 176         free(fsid);
 177
 178         libhammer_free_fsinfo(fip);
 179
 180 }
 181
 182 static double
 183 percent(int64_t value, int64_t total)
 184 {
 185         /* Avoid divide-by-zero */
 186         if (total == 0)
 187                 return 100.0;
 188
 189         return ((value * 100.0) / (double)total);
 190 }