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 #include <libhammer.h>
  38
  39 #include "hammer.h"
  40
  41 void show_info(char *path);
  42 static double percent(int64_t value, int64_t total);
  43
  44 void
  45 hammer_cmd_info(char **av, int ac)
  46 {
  47         struct statfs *stfsbuf;
  48         int mntsize, i, first = 1;
  49         char *fstype, *path;
  50
  51         tzset();
  52
  53         if (ac > 0) {
  54                 while (ac) {
  55                         show_info(*av);
  56                         --ac;
  57                         ++av;
  58                         if (ac)
  59                                 printf("\n");
  60                 }
  61         } else {
  62                 mntsize = getmntinfo(&stfsbuf, MNT_NOWAIT);
  63                 if (mntsize > 0) {
  64                         for (i = 0; i < mntsize; i++) {
  65                                 fstype = stfsbuf[i].f_fstypename;
  66                                 path = stfsbuf[i].f_mntonname;
  67                                 if ((strcmp(fstype, "hammer")) == 0) {
  68                                         if (first)
  69                                                 first = 0;
  70                                         else
  71                                                 printf("\n");
  72                                         show_info(path);
  73                                 }
  74                         }
  75                         if (first)
  76                                 printf("No mounted HAMMER filesystems found\n");
  77                 } else {
  78                         printf("No mounted filesystems found\n");
  79                 }
  80         }
  81 }
  82
  83 void
  84 show_info(char *path)
  85 {
  86         libhammer_fsinfo_t fip;
  87         libhammer_pfsinfo_t pi, pi_first;
  88         struct hammer_ioc_volume_list ioc;
  89         int64_t     usedbigblocks;
  90         int64_t     usedbytes, rsvbytes;
  91         int64_t     totalbytes, freebytes;
  92         char        *fsid;
  93         char        buf[6];
  94         char        rootvol[MAXPATHLEN];
  95         int i;
  96
  97         fsid = NULL;
  98         usedbigblocks = 0;
  99
 100         usedbytes = totalbytes = rsvbytes = freebytes = 0;
 101
 102         fip = libhammer_get_fsinfo(path);
 103         if (fip == NULL)
 104                 errx(1, "libhammer_get_fsinfo");
 105
 106         /* Find out the UUID strings */
 107         uuid_to_string(&fip->vol_fsid, &fsid, NULL);
 108
 109         /* Get the volume paths */
 110         if (hammer_fs_to_vol(path, &ioc) == -1)
 111                 errx(1, "Failed to get volume paths");
 112
 113         /* Get the root volume path */
 114         if (hammer_fs_to_rootvol(path, rootvol, sizeof(rootvol)) == -1)
 115                 errx(1, "Failed to get root volume path");
 116
 117         /* Volume information */
 118         printf("Volume identification\n");
 119         printf("\tLabel               %s\n", fip->vol_name);
 120         printf("\tNo. Volumes         %d\n", fip->nvolumes);
 121         printf("\tHAMMER Volumes      ");
 122         for (i = 0; i < ioc.nvols; i++) {
 123                 printf("%s", ioc.vols[i].device_name);
 124                 if (i != ioc.nvols - 1)
 125                         printf(":");
 126         }
 127         printf("\n");
 128         printf("\tRoot Volume         %s\n", rootvol);
 129         printf("\tFSID                %s\n", fsid);
 130         printf("\tHAMMER Version      %d\n", fip->version);
 131
 132         /* Big-blocks information */
 133         usedbigblocks = fip->bigblocks - fip->freebigblocks;
 134
 135         printf("Big-block information\n");
 136         printf("\tTotal      %10jd\n", (intmax_t)fip->bigblocks);
 137         printf("\tUsed       %10jd (%.2lf%%)\n"
 138                "\tReserved   %10jd (%.2lf%%)\n"
 139                "\tFree       %10jd (%.2lf%%)\n",
 140                 (intmax_t)usedbigblocks,
 141                 percent(usedbigblocks, fip->bigblocks),
 142                 (intmax_t)fip->rsvbigblocks,
 143                 percent(fip->rsvbigblocks, fip->bigblocks),
 144                 (intmax_t)(fip->freebigblocks - fip->rsvbigblocks),
 145                 percent(fip->freebigblocks - fip->rsvbigblocks, fip->bigblocks));
 146         printf("Space information\n");
 147
 148         /* Space information */
 149         totalbytes = (fip->bigblocks << HAMMER_BIGBLOCK_BITS);
 150         usedbytes = (usedbigblocks << HAMMER_BIGBLOCK_BITS);
 151         rsvbytes = (fip->rsvbigblocks << HAMMER_BIGBLOCK_BITS);
 152         freebytes = ((fip->freebigblocks - fip->rsvbigblocks)
 153             << HAMMER_BIGBLOCK_BITS);
 154
 155         printf("\tNo. Inodes %10jd\n", (intmax_t)fip->inodes);
 156         humanize_number(buf, sizeof(buf)  - (totalbytes < 0 ? 0 : 1),
 157             totalbytes, "", HN_AUTOSCALE, HN_DECIMAL | HN_NOSPACE | HN_B);
 158         printf("\tTotal size     %6s (%jd bytes)\n",
 159             buf, (intmax_t)totalbytes);
 160
 161         humanize_number(buf, sizeof(buf)  - (usedbytes < 0 ? 0 : 1),
 162             usedbytes, "", HN_AUTOSCALE, HN_DECIMAL | HN_NOSPACE | HN_B);
 163         printf("\tUsed           %6s (%.2lf%%)\n", buf,
 164             percent(usedbytes, totalbytes));
 165
 166         humanize_number(buf, sizeof(buf)  - (rsvbytes < 0 ? 0 : 1),
 167             rsvbytes, "", HN_AUTOSCALE, HN_DECIMAL | HN_NOSPACE | HN_B);
 168         printf("\tReserved       %6s (%.2lf%%)\n", buf,
 169             percent(rsvbytes, totalbytes));
 170
 171         humanize_number(buf, sizeof(buf)  - (freebytes < 0 ? 0 : 1),
 172             freebytes, "", HN_AUTOSCALE, HN_DECIMAL | HN_NOSPACE | HN_B);
 173         printf("\tFree           %6s (%.2lf%%)\n", buf,
 174             percent(freebytes, totalbytes));
 175
 176         /* Pseudo-filesystem information */
 177         printf("PFS information\n");
 178         printf("\t  PFS#  Mode    Snaps\n");
 179
 180         /* Iterate all the PFSs found */
 181         pi_first = libhammer_get_first_pfs(fip);
 182         for (pi = pi_first; pi != NULL; pi = libhammer_get_next_pfs(pi)) {
 183                 printf("\t%6d  %-6s",
 184                     pi->pfs_id, (pi->ismaster ? "MASTER" : "SLAVE"));
 185
 186                 snprintf(buf, 6, "%d", pi->snapcount);
 187                 printf(" %6s", (pi->head.error && pi->snapcount == 0) ? "-" : buf);
 188                 if (pi->pfs_id == HAMMER_ROOT_PFSID)
 189                         printf(" (root PFS)");
 190                 printf("\n");
 191         }
 192
 193         free(fsid);
 194
 195         libhammer_free_fsinfo(fip);
 196
 197 }
 198
 199 static double
 200 percent(int64_t value, int64_t total)
 201 {
 202         /* Avoid divide-by-zero */
 203         if (total == 0)
 204                 return 100.0;
 205
 206         return ((value * 100.0) / (double)total);
 207 }