The Design and Implementation of the FreeBSD Operating System, Second Edition
Now available: The Design and Implementation of the FreeBSD Operating System (Second Edition)


[ source navigation ] [ diff markup ] [ identifier search ] [ freetext search ] [ file search ] [ list types ] [ track identifier ]

FreeBSD/Linux Kernel Cross Reference
sys/geom/label/g_label_ntfs.c

Version: -  FREEBSD  -  FREEBSD-13-STABLE  -  FREEBSD-13-0  -  FREEBSD-12-STABLE  -  FREEBSD-12-0  -  FREEBSD-11-STABLE  -  FREEBSD-11-0  -  FREEBSD-10-STABLE  -  FREEBSD-10-0  -  FREEBSD-9-STABLE  -  FREEBSD-9-0  -  FREEBSD-8-STABLE  -  FREEBSD-8-0  -  FREEBSD-7-STABLE  -  FREEBSD-7-0  -  FREEBSD-6-STABLE  -  FREEBSD-6-0  -  FREEBSD-5-STABLE  -  FREEBSD-5-0  -  FREEBSD-4-STABLE  -  FREEBSD-3-STABLE  -  FREEBSD22  -  l41  -  OPENBSD  -  linux-2.6  -  MK84  -  PLAN9  -  xnu-8792 
SearchContext: -  none  -  3  -  10 

    1 /*-
    2  * Copyright (c) 2005 Takanori Watanabe
    3  * All rights reserved.
    4  *
    5  * Redistribution and use in source and binary forms, with or without
    6  * modification, are permitted provided that the following conditions
    7  * are met:
    8  * 1. Redistributions of source code must retain the above copyright
    9  *    notice, this list of conditions and the following disclaimer.
   10  * 2. Redistributions in binary form must reproduce the above copyright
   11  *    notice, this list of conditions and the following disclaimer in the
   12  *    documentation and/or other materials provided with the distribution.
   13  *
   14  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
   15  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
   16  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
   17  * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
   18  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
   19  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
   20  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
   21  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
   22  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
   23  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
   24  * SUCH DAMAGE.
   25  */
   26 
   27 #include <sys/cdefs.h>
   28 __FBSDID("$FreeBSD$");
   29 
   30 #include <sys/param.h>
   31 #include <sys/systm.h>
   32 #include <sys/kernel.h>
   33 #include <sys/malloc.h>
   34 
   35 #include <geom/geom.h>
   36 #include <geom/label/g_label.h>
   37 
   38 #define NTFS_A_VOLUMENAME       0x60
   39 #define NTFS_FILEMAGIC          ((uint32_t)(0x454C4946))
   40 #define NTFS_VOLUMEINO          3
   41 
   42 #define G_LABEL_NTFS_DIR        "ntfs"
   43 
   44 struct ntfs_attr {
   45         uint32_t        a_type;
   46         uint32_t        reclen;
   47         uint8_t         a_flag;
   48         uint8_t         a_namelen;
   49         uint8_t         a_nameoff;
   50         uint8_t         reserved1;
   51         uint8_t         a_compression;
   52         uint8_t         reserved2;
   53         uint16_t        a_index;
   54         uint16_t        a_datalen;
   55         uint16_t        reserved3;
   56         uint16_t        a_dataoff;
   57         uint16_t        a_indexed;
   58 } __packed;
   59 
   60 struct ntfs_filerec {
   61         uint32_t        fr_hdrmagic;
   62         uint16_t        fr_hdrfoff;
   63         uint16_t        fr_hdrfnum;
   64         uint8_t         reserved[8];
   65         uint16_t        fr_seqnum;
   66         uint16_t        fr_nlink;
   67         uint16_t        fr_attroff;
   68         uint16_t        fr_flags;
   69         uint32_t        fr_size;
   70         uint32_t        fr_allocated;
   71         uint64_t        fr_mainrec;
   72         uint16_t        fr_attrnum;
   73 } __packed;
   74 
   75 struct ntfs_bootfile {
   76         uint8_t         reserved1[3];
   77         uint8_t         bf_sysid[8];
   78         uint16_t        bf_bps;
   79         uint8_t         bf_spc;
   80         uint8_t         reserved2[7];
   81         uint8_t         bf_media;
   82         uint8_t         reserved3[2];
   83         uint16_t        bf_spt;
   84         uint16_t        bf_heads;
   85         uint8_t         reserver4[12];
   86         uint64_t        bf_spv;
   87         uint64_t        bf_mftcn;
   88         uint64_t        bf_mftmirrcn;
   89         int8_t          bf_mftrecsz;
   90         uint32_t        bf_ibsz;
   91         uint32_t        bf_volsn;
   92 } __packed;
   93 
   94 static void
   95 g_label_ntfs_taste(struct g_consumer *cp, char *label, size_t size)
   96 {
   97         struct g_provider *pp;
   98         struct ntfs_bootfile *bf;
   99         struct ntfs_filerec *fr;
  100         struct ntfs_attr *atr;
  101         off_t voloff;
  102         char *filerecp, *ap;
  103         int8_t mftrecsz;
  104         char vnchar;
  105         int recsize, j;
  106 
  107         g_topology_assert_not();
  108 
  109         label[0] = '\0';
  110         pp = cp->provider;
  111         filerecp = NULL;
  112 
  113         bf = (struct ntfs_bootfile *)g_read_data(cp, 0, pp->sectorsize, NULL);
  114         if (bf == NULL || strncmp(bf->bf_sysid, "NTFS    ", 8) != 0)
  115                 goto done;
  116 
  117         mftrecsz = bf->bf_mftrecsz;
  118         recsize = (mftrecsz > 0) ? (mftrecsz * bf->bf_bps * bf->bf_spc) : (1 << -mftrecsz);
  119         if (recsize == 0 || recsize % pp->sectorsize != 0)
  120                 goto done;
  121 
  122         voloff = bf->bf_mftcn * bf->bf_spc * bf->bf_bps +
  123             recsize * NTFS_VOLUMEINO;
  124         if (voloff % pp->sectorsize != 0)
  125                 goto done;
  126 
  127         filerecp = g_read_data(cp, voloff, recsize, NULL);
  128         if (filerecp == NULL)
  129                 goto done;
  130         fr = (struct ntfs_filerec *)filerecp;
  131 
  132         if (fr->fr_hdrmagic != NTFS_FILEMAGIC)
  133                 goto done;
  134 
  135         for (ap = filerecp + fr->fr_attroff;
  136             atr = (struct ntfs_attr *)ap, atr->a_type != -1;
  137             ap += atr->reclen) {
  138                 if (atr->a_type == NTFS_A_VOLUMENAME) {
  139                         if(atr->a_datalen >= size *2){
  140                                 label[0] = 0;
  141                                 goto done;
  142                         }
  143                         /*
  144                          *UNICODE to ASCII.
  145                          * Should we need to use iconv(9)?
  146                          */
  147                         for (j = 0; j < atr->a_datalen; j++) {
  148                                 vnchar = *(ap + atr->a_dataoff + j);
  149                                 if (j & 1) {
  150                                         if (vnchar) {
  151                                                 label[0] = 0;
  152                                                 goto done;
  153                                         }
  154                                 } else {
  155                                         label[j / 2] = vnchar;
  156                                 }
  157                         }
  158                         label[j / 2] = 0;
  159                         break;
  160                 }
  161         }
  162 done:
  163         if (bf != NULL)
  164                 g_free(bf);
  165         if (filerecp != NULL)
  166                 g_free(filerecp);
  167 }
  168 
  169 struct g_label_desc g_label_ntfs = {
  170         .ld_taste = g_label_ntfs_taste,
  171         .ld_dir = G_LABEL_NTFS_DIR,
  172         .ld_enabled = 1
  173 };
  174 
  175 G_LABEL_INIT(ntfs, g_label_ntfs, "Create device nodes for NTFS volumes");

Cache object: cfd7107f8e2191e34cb12e93c0e3acd5


[ source navigation ] [ diff markup ] [ identifier search ] [ freetext search ] [ file search ] [ list types ] [ track identifier ]


This page is part of the FreeBSD/Linux Linux Kernel Cross-Reference, and was automatically generated using a modified version of the LXR engine.