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 /*
  84  * This is an adhoc function which exists only because libhammer can't
  85  * properly handle variety of errors.
  86  */
  87 static
  88 void
  89 __test_if_hammer_or_abort(const char *path)
  90 {
  91         struct hammer_ioc_info info;
  92         int fd;
  93
  94         fd = open(path, O_RDONLY);
  95         if (fd < 0) {
  96                 err(1, "Failed to open %s", path);
  97                 /* not reached */
  98         }
  99
 100         /*
 101          * This ioctl never fails as long as fd is for HAMMER filesystem,
 102          * thus we can assume path isn't in HAMMER if this fails.
 103          */
 104         if (ioctl(fd, HAMMERIOC_GET_INFO, &info) < 0) {
 105                 err(1, "%s is probably not a HAMMER filesystem", path);
 106                 /* not reached */
 107         }
 108
 109         close(fd);
 110 }
 111
 112 void
 113 show_info(char *path)
 114 {
 115         libhammer_fsinfo_t fip;
 116         libhammer_pfsinfo_t pi, pi_first;
 117         struct hammer_ioc_volume_list ioc;
 118         int64_t     usedbigblocks;
 119         int64_t     usedbytes, rsvbytes;
 120         int64_t     totalbytes, freebytes;
 121         char        *fsid;
 122         char        buf[6];
 123         char        rootvol[MAXPATHLEN];
 124         int i;
 125
 126         fsid = NULL;
 127         usedbigblocks = 0;
 128
 129         usedbytes = totalbytes = rsvbytes = freebytes = 0;
 130
 131         /* Need to do this before libhammer gets involved */
 132         __test_if_hammer_or_abort(path);
 133
 134         fip = libhammer_get_fsinfo(path);
 135         if (fip == NULL) {
 136                 errx(1, "Failed to get filesystem info");
 137                 /* not reached */
 138         }
 139
 140         /* Find out the UUID strings */
 141         uuid_to_string(&fip->vol_fsid, &fsid, NULL);
 142
 143         /* Get the volume paths */
 144         if (hammer_fs_to_vol(path, &ioc) == -1) {
 145                 errx(1, "Failed to get volume paths");
 146                 /* not reached */
 147         }
 148
 149         /* Get the root volume path */
 150         if (hammer_fs_to_rootvol(path, rootvol, sizeof(rootvol)) == -1) {
 151                 errx(1, "Failed to get root volume path");
 152                 /* not reached */
 153         }
 154
 155         /* Volume information */
 156         printf("Volume identification\n");
 157         printf("\tLabel               %s\n", fip->vol_name);
 158         printf("\tNo. Volumes         %d\n", fip->nvolumes);
 159         printf("\tHAMMER Volumes      ");
 160         for (i = 0; i < ioc.nvols; i++) {
 161                 printf("%s", ioc.vols[i].device_name);
 162                 if (i != ioc.nvols - 1)
 163                         printf(":");
 164         }
 165         printf("\n");
 166         printf("\tRoot Volume         %s\n", rootvol);
 167         printf("\tFSID                %s\n", fsid);
 168         printf("\tHAMMER Version      %d\n", fip->version);
 169
 170         /* Big-blocks information */
 171         usedbigblocks = fip->bigblocks - fip->freebigblocks;
 172
 173         printf("Big-block information\n");
 174         printf("\tTotal      %10jd\n", (intmax_t)fip->bigblocks);
 175         printf("\tUsed       %10jd (%.2lf%%)\n"
 176                "\tReserved   %10jd (%.2lf%%)\n"
 177                "\tFree       %10jd (%.2lf%%)\n",
 178                 (intmax_t)usedbigblocks,
 179                 percent(usedbigblocks, fip->bigblocks),
 180                 (intmax_t)fip->rsvbigblocks,
 181                 percent(fip->rsvbigblocks, fip->bigblocks),
 182                 (intmax_t)(fip->freebigblocks - fip->rsvbigblocks),
 183                 percent(fip->freebigblocks - fip->rsvbigblocks, fip->bigblocks));
 184         printf("Space information\n");
 185
 186         /* Space information */
 187         totalbytes = (fip->bigblocks << HAMMER_BIGBLOCK_BITS);
 188         usedbytes = (usedbigblocks << HAMMER_BIGBLOCK_BITS);
 189         rsvbytes = (fip->rsvbigblocks << HAMMER_BIGBLOCK_BITS);
 190         freebytes = ((fip->freebigblocks - fip->rsvbigblocks)
 191             << HAMMER_BIGBLOCK_BITS);
 192
 193         printf("\tNo. Inodes %10jd\n", (intmax_t)fip->inodes);
 194         humanize_number(buf, sizeof(buf)  - (totalbytes < 0 ? 0 : 1),
 195             totalbytes, "", HN_AUTOSCALE, HN_DECIMAL | HN_NOSPACE | HN_B);
 196         printf("\tTotal size     %6s (%jd bytes)\n",
 197             buf, (intmax_t)totalbytes);
 198
 199         humanize_number(buf, sizeof(buf)  - (usedbytes < 0 ? 0 : 1),
 200             usedbytes, "", HN_AUTOSCALE, HN_DECIMAL | HN_NOSPACE | HN_B);
 201         printf("\tUsed           %6s (%.2lf%%)\n", buf,
 202             percent(usedbytes, totalbytes));
 203
 204         humanize_number(buf, sizeof(buf)  - (rsvbytes < 0 ? 0 : 1),
 205             rsvbytes, "", HN_AUTOSCALE, HN_DECIMAL | HN_NOSPACE | HN_B);
 206         printf("\tReserved       %6s (%.2lf%%)\n", buf,
 207             percent(rsvbytes, totalbytes));
 208
 209         humanize_number(buf, sizeof(buf)  - (freebytes < 0 ? 0 : 1),
 210             freebytes, "", HN_AUTOSCALE, HN_DECIMAL | HN_NOSPACE | HN_B);
 211         printf("\tFree           %6s (%.2lf%%)\n", buf,
 212             percent(freebytes, totalbytes));
 213
 214         /* Pseudo-filesystem information */
 215         printf("PFS information\n");
 216         printf("\t  PFS#  Mode    Snaps\n");
 217
 218         /* Iterate all the PFSs found */
 219         pi_first = libhammer_get_first_pfs(fip);
 220         for (pi = pi_first; pi != NULL; pi = libhammer_get_next_pfs(pi)) {
 221                 printf("\t%6d  %-6s",
 222                     pi->pfs_id, (pi->ismaster ? "MASTER" : "SLAVE"));
 223
 224                 snprintf(buf, 6, "%d", pi->snapcount);
 225                 printf(" %6s", (pi->head.error && pi->snapcount == 0) ? "-" : buf);
 226                 if (pi->pfs_id == HAMMER_ROOT_PFSID)
 227                         printf(" (root PFS)");
 228                 printf("\n");
 229         }
 230
 231         free(fsid);
 232
 233         libhammer_free_fsinfo(fip);
 234
 235 }
 236
 237 static
 238 double
 239 percent(int64_t value, int64_t total)
 240 {
 241         /* Avoid divide-by-zero */
 242         if (total == 0)
 243                 return 100.0;
 244
 245         return ((value * 100.0) / (double)total);
 246 }