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 char    *find_pfs_mount(int pfsid, uuid_t parentuuid, int ismaster);
  40 double  percent(int64_t value, int64_t total);
  41
  42 void
  43 hammer_cmd_info(void)
  44 {
  45         struct statfs *stfsbuf;
  46         int mntsize, i;
  47         char *fstype, *path;
  48
  49         tzset();
  50         mntsize = getmntinfo(&stfsbuf, MNT_NOWAIT);
  51         if (mntsize > 0) {
  52                 for (i=0; i < mntsize; i++) {
  53                         fstype = stfsbuf[i].f_fstypename;
  54                         path = stfsbuf[i].f_mntonname;
  55                         if ((strcmp(fstype, "hammer")) == 0)
  56                                 show_info(path);
  57                 }
  58         } else {
  59                 fprintf(stdout, "No mounted filesystems found\n");
  60         }
  61
  62 }
  63
  64 void
  65 show_info(char *path)
  66 {
  67         struct      hammer_ioc_snapshot snapinfo;
  68         struct      hammer_pseudofs_data pfs_od;
  69         struct      hammer_ioc_pseudofs_rw pfs;
  70         int64_t     usedbigblocks, bytes;
  71         struct      hammer_ioc_info info;
  72         int         fd, pfs_id, ismaster;
  73         char        *fsid, *fstype;
  74         char        *mountedon;
  75         char        buf[6];
  76         u_int32_t   sc;
  77
  78         fsid = fstype = mountedon = NULL;
  79         usedbigblocks = 0;
  80         pfs_id = 1;           /* Do not include PFS#0 */
  81         bytes = 0;
  82         sc = 0;
  83
  84         bzero(&info, sizeof(struct hammer_ioc_info));
  85         bzero(&snapinfo, sizeof(struct hammer_ioc_snapshot));
  86
  87         /* Try to get a file descriptor based on the path given */
  88         fd = open(path, O_RDONLY);
  89         if (fd < 0) {
  90                 perror("show_info");
  91                 exit(EXIT_FAILURE);
  92         }
  93
  94         if ((ioctl(fd, HAMMERIOC_GET_INFO, &info)) < 0) {
  95                 perror("show_info");
  96                 exit(EXIT_FAILURE);
  97         }
  98
  99         /* Find out the UUID strings */
 100         uuid_to_string(&info.vol_fsid, &fsid, NULL);
 101
 102         /* Volume information */
 103         fprintf(stdout, "Volume identification\n");
 104         fprintf(stdout, "\tLabel          %s\n", info.vol_name);
 105         fprintf(stdout, "\tNo. Volumes    %d\n", info.nvolumes);
 106         fprintf(stdout, "\tFSID           %s\n", fsid);
 107
 108         /* Big blocks information */
 109         usedbigblocks = info.bigblocks - info.freebigblocks;
 110
 111         fprintf(stdout, "Big block information\n");
 112         fprintf(stdout, "\tTotal\t       %jd\n", (intmax_t)info.bigblocks);
 113         fprintf(stdout, "\tUsed\t       %jd (%.2lf%%)\n\tReserved       "
 114                                        "%jd (%.2lf%%)\n\tFree\t       "
 115                                        "%jd (%.2lf%%)\n",
 116                         (intmax_t)usedbigblocks,
 117                         percent(usedbigblocks, info.bigblocks),
 118                         (intmax_t)info.rsvbigblocks,
 119                         percent(info.rsvbigblocks, info.bigblocks),
 120                         (intmax_t)(info.freebigblocks - info.rsvbigblocks),
 121                         percent(info.freebigblocks - info.rsvbigblocks,
 122                                 info.bigblocks));
 123         fprintf(stdout, "Space information\n");
 124
 125         /* Space information */
 126         bytes = (info.bigblocks << HAMMER_LARGEBLOCK_BITS);
 127         humanize_number(buf, sizeof(buf)  - (bytes < 0 ? 0 : 1), bytes, "",
 128                         HN_AUTOSCALE, HN_DECIMAL | HN_NOSPACE | HN_B);
 129         fprintf(stdout, "\tTotal size     %6s (%jd bytes)\n",
 130                 buf, (intmax_t)bytes);
 131
 132         bytes = (usedbigblocks << HAMMER_LARGEBLOCK_BITS);
 133         humanize_number(buf, sizeof(buf)  - (bytes < 0 ? 0 : 1), bytes, "",
 134                         HN_AUTOSCALE, HN_DECIMAL | HN_NOSPACE | HN_B);
 135         fprintf(stdout, "\tUsed space     %6s\n", buf);
 136
 137         bytes = (info.rsvbigblocks << HAMMER_LARGEBLOCK_BITS);
 138         humanize_number(buf, sizeof(buf)  - (bytes < 0 ? 0 : 1), bytes, "",
 139                         HN_AUTOSCALE, HN_DECIMAL | HN_NOSPACE | HN_B);
 140         fprintf(stdout, "\tReserved space %6s\n", buf);
 141
 142         bytes = ((info.freebigblocks - info.rsvbigblocks) << HAMMER_LARGEBLOCK_BITS);
 143         humanize_number(buf, sizeof(buf)  - (bytes < 0 ? 0 : 1), bytes, "",
 144                         HN_AUTOSCALE, HN_DECIMAL | HN_NOSPACE | HN_B);
 145         fprintf(stdout, "\tFree space     %6s\n", buf);
 146
 147         /* Pseudo-filesystem information */
 148         fprintf(stdout, "PFS information\n");
 149         fprintf(stdout, "\tPFS-Id\tMode\tSnaps\tMounted-on\n");
 150
 151         while(pfs_id < HAMMER_MAX_PFS) {
 152                 bzero(&pfs, sizeof(pfs));
 153                 bzero(&pfs_od, sizeof(pfs_od));
 154                 pfs.pfs_id = pfs_id;
 155                 pfs.ondisk = &pfs_od;
 156                 pfs.bytes = sizeof(pfs_od);
 157                 pfs.version = HAMMER_IOC_PSEUDOFS_VERSION;
 158                 if (ioctl(fd, HAMMERIOC_GET_PSEUDOFS, &pfs) >= 0) {
 159                         if (ioctl(fd, HAMMERIOC_GET_SNAPSHOT, &snapinfo) >= 0)
 160                                 sc = snapinfo.count;
 161
 162                         ismaster = (pfs_od.mirror_flags & HAMMER_PFSD_SLAVE) ? 0 : 1;
 163                         mountedon = find_pfs_mount(pfs_id, info.vol_fsid, ismaster);
 164
 165                         fprintf(stdout, "\t%05d\t%6s\t%5u\t",
 166                                 pfs_id, (ismaster ? "MASTER" : "SLAVE"), sc);
 167                         if (mountedon)
 168                                 fprintf(stdout, "%s", mountedon);
 169                         else
 170                                 fprintf(stdout, "not-mounted");
 171                         fprintf(stdout, "\n");
 172                 }
 173                 pfs_id++;
 174         }
 175
 176         fprintf(stdout, "\n\n");        /* In the case multiple volumes, two new-line separation */
 177
 178         free(fsid);
 179         free(mountedon);
 180 }
 181
 182 char *
 183 find_pfs_mount(int pfsid, uuid_t parentuuid, int ismaster)
 184 {
 185         struct hammer_ioc_info hi;
 186         struct statfs *mntbuf;
 187         int mntsize;
 188         int curmount;
 189         int fd;
 190         size_t  mntbufsize;
 191         char *trailstr;
 192         char *retval;
 193
 194         retval = NULL;
 195
 196         /* Do not continue if there are no mounted filesystems */
 197         mntsize = getfsstat(NULL, 0, MNT_NOWAIT);
 198         if (mntsize <= 0)
 199                 return retval;
 200
 201         mntbufsize = (mntsize) * sizeof(struct statfs);
 202         mntbuf = malloc(mntbufsize);
 203         if (mntbuf == NULL) {
 204                 perror("show_info");
 205                 exit(EXIT_FAILURE);
 206         }
 207
 208         mntsize = getfsstat(mntbuf, (long)mntbufsize, MNT_NOWAIT);
 209         curmount = mntsize - 1;
 210
 211         asprintf(&trailstr, ":%05d", pfsid);
 212
 213         /*
 214          * Iterate all the mounted points looking for the PFS passed to
 215          * this function.
 216          */
 217         while(curmount >= 0) {
 218                 /*
 219                  * We need to avoid that PFS belonging to other HAMMER
 220                  * filesystems are showed as mounted, so we compare
 221                  * against the FSID, which is presumable to be unique.
 222                  */
 223                 bzero(&hi, sizeof(hi));
 224                 if ((fd = open(mntbuf[curmount].f_mntfromname, O_RDONLY)) < 0) {
 225                         curmount--;
 226                         continue;
 227                 }
 228
 229                 if ((ioctl(fd, HAMMERIOC_GET_INFO, &hi)) < 0) {
 230                         curmount--;
 231                         continue;
 232                 }
 233
 234                 if (strstr(mntbuf[curmount].f_mntfromname, trailstr) != NULL &&
 235                     (uuid_compare(&hi.vol_fsid, &parentuuid, NULL)) == 0) {
 236                         if (ismaster) {
 237                                 if (strstr(mntbuf[curmount].f_mntfromname, "@@-1") != NULL) {
 238                                         retval = strdup(mntbuf[curmount].f_mntonname);
 239                                         break;
 240                                 }
 241                         } else {
 242                                 if (strstr(mntbuf[curmount].f_mntfromname, "@@0x") != NULL ) {
 243                                         retval = strdup(mntbuf[curmount].f_mntonname);
 244                                         break;
 245                                 }
 246                         }
 247                 }
 248                 curmount--;
 249         }
 250         free(trailstr);
 251         return retval;
 252 }
 253
 254 double
 255 percent(int64_t value, int64_t total)
 256 {
 257         /* Avoid divide-by-zero */
 258         if (value == 0)
 259                 value = 1;
 260
 261         return ((value * 100.0) / (double)total);
 262 }