sbin/hammer/cmd_volume.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 Matthew Dillon <dillon@backplane.com> and
   6  * Michael Neumann <mneumann@ntecs.de>
   7  *
   8  * Redistribution and use in source and binary forms, with or without
   9  * modification, are permitted provided that the following conditions
  10  * are met:
  11  *
  12  * 1. Redistributions of source code must retain the above copyright
  13  *    notice, this list of conditions and the following disclaimer.
  14  * 2. Redistributions in binary form must reproduce the above copyright
  15  *    notice, this list of conditions and the following disclaimer in
  16  *    the documentation and/or other materials provided with the
  17  *    distribution.
  18  * 3. Neither the name of The DragonFly Project nor the names of its
  19  *    contributors may be used to endorse or promote products derived
  20  *    from this software without specific, prior written permission.
  21  *
  22  * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
  23  * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
  24  * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
  25  * FOR A PARTICULAR PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE
  26  * COPYRIGHT HOLDERS OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
  27  * INCIDENTAL, SPECIAL, EXEMPLARY OR CONSEQUENTIAL DAMAGES (INCLUDING,
  28  * BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
  29  * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED
  30  * AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
  31  * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT
  32  * OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
  33  * SUCH DAMAGE.
  34  *
  35  */
  36 /*
  37  * Volume operations:
  38  *
  39  *   - volume-add: Add new volume to HAMMER filesystem
  40  *   - volume-del: Remove volume from HAMMER filesystem
  41  */
  42
  43 #include "hammer.h"
  44 #include <string.h>
  45 #include <stdlib.h>
  46
  47 static uint64_t check_volume(const char *vol_name);
  48
  49 /*
  50  * volume-add <device> <filesystem>
  51  */
  52 void
  53 hammer_cmd_volume_add(char **av, int ac)
  54 {
  55         struct hammer_ioc_volume ioc;
  56         int fd;
  57
  58         if (ac != 2) {
  59                 fprintf(stderr, "hammer volume-add <device> <filesystem>\n");
  60                 exit(1);
  61         }
  62
  63         char *device = av[0];
  64         char *filesystem = av[1];
  65
  66         fd = open(filesystem, O_RDONLY);
  67         if (fd < 0) {
  68                 fprintf(stderr, "hammer volume-add: unable to access %s: %s\n",
  69                         filesystem, strerror(errno));
  70                 exit(1);
  71         }
  72
  73         /*
  74          * volume-add ioctl
  75          */
  76         bzero(&ioc, sizeof(ioc));
  77         strncpy(ioc.device_name, device, MAXPATHLEN);
  78         ioc.vol_size = check_volume(device);
  79         ioc.boot_area_size = HAMMER_BOOT_NOMBYTES;
  80         ioc.mem_area_size = HAMMER_MEM_NOMBYTES;
  81
  82         if (ioctl(fd, HAMMERIOC_ADD_VOLUME, &ioc) < 0) {
  83                 fprintf(stderr, "hammer volume-add ioctl: %s\n",
  84                         strerror(errno));
  85                 exit(1);
  86         }
  87
  88         close(fd);
  89 }
  90
  91 /*
  92  * volume-del <device> <filesystem>
  93  */
  94 void
  95 hammer_cmd_volume_del(char **av, int ac)
  96 {
  97         struct hammer_ioc_volume ioc;
  98         int fd;
  99
 100         if (ac != 2) {
 101                 fprintf(stderr, "hammer volume-del <device> <filesystem>\n");
 102                 exit(1);
 103         }
 104
 105
 106         char *device = av[0];
 107         char *filesystem = av[1];
 108
 109         fd = open(filesystem, O_RDONLY);
 110         if (fd < 0) {
 111                 fprintf(stderr, "hammer volume-add: unable to access %s: %s\n",
 112                         filesystem, strerror(errno));
 113                 exit(1);
 114         }
 115
 116         /*
 117          * volume-del ioctl
 118          */
 119         bzero(&ioc, sizeof(ioc));
 120         strncpy(ioc.device_name, device, MAXPATHLEN);
 121
 122         if (ioctl(fd, HAMMERIOC_DEL_VOLUME, &ioc) < 0) {
 123                 fprintf(stderr, "hammer volume-del ioctl: %s\n",
 124                         strerror(errno));
 125                 exit(1);
 126         }
 127
 128         close(fd);
 129 }
 130
 131 /*
 132  * Check basic volume characteristics.  HAMMER filesystems use a minimum
 133  * of a 16KB filesystem buffer size.
 134  *
 135  * Returns the size of the device.
 136  *
 137  * From newfs_hammer.c
 138  */
 139 static
 140 uint64_t
 141 check_volume(const char *vol_name)
 142 {
 143         struct partinfo pinfo;
 144         int fd;
 145
 146         /*
 147          * Get basic information about the volume
 148          */
 149         fd = open(vol_name, O_RDWR);
 150         if (fd < 0)
 151                 errx(1, "Unable to open %s R+W", vol_name);
 152
 153         if (ioctl(fd, DIOCGPART, &pinfo) < 0) {
 154                 errx(1, "No block device: %s", vol_name);
 155         }
 156         /*
 157          * When formatting a block device as a HAMMER volume the
 158          * sector size must be compatible. HAMMER uses 16384 byte
 159          * filesystem buffers.
 160          */
 161         if (pinfo.reserved_blocks) {
 162                 errx(1, "HAMMER cannot be placed in a partition "
 163                         "which overlaps the disklabel or MBR");
 164         }
 165         if (pinfo.media_blksize > 16384 ||
 166             16384 % pinfo.media_blksize) {
 167                 errx(1, "A media sector size of %d is not supported",
 168                      pinfo.media_blksize);
 169         }
 170
 171         close(fd);
 172         return pinfo.media_size;
 173 }