g_part_apm.c

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    1 /*-
    2  * Copyright (c) 2006-2008 Marcel Moolenaar
    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  *
    9  * 1. Redistributions of source code must retain the above copyright
   10  *    notice, this list of conditions and the following disclaimer.
   11  * 2. Redistributions in binary form must reproduce the above copyright
   12  *    notice, this list of conditions and the following disclaimer in the
   13  *    documentation and/or other materials provided with the distribution.
   14  *
   15  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
   16  * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
   17  * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
   18  * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
   19  * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
   20  * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
   21  * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
   22  * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
   23  * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
   24  * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
   25  */
   26 
   27 #include <sys/cdefs.h>
   28 __FBSDID("$FreeBSD: releng/10.0/sys/geom/part/g_part_apm.c 253938 2013-08-04 21:00:22Z marcel $");
   29 
   30 #include <sys/param.h>
   31 #include <sys/apm.h>
   32 #include <sys/bio.h>
   33 #include <sys/endian.h>
   34 #include <sys/kernel.h>
   35 #include <sys/kobj.h>
   36 #include <sys/limits.h>
   37 #include <sys/lock.h>
   38 #include <sys/malloc.h>
   39 #include <sys/mutex.h>
   40 #include <sys/queue.h>
   41 #include <sys/sbuf.h>
   42 #include <sys/systm.h>
   43 #include <sys/sysctl.h>
   44 #include <geom/geom.h>
   45 #include <geom/part/g_part.h>
   46 
   47 #include "g_part_if.h"
   48 
   49 FEATURE(geom_part_apm, "GEOM partitioning class for Apple-style partitions");
   50 
   51 struct g_part_apm_table {
   52         struct g_part_table     base;
   53         struct apm_ddr          ddr;
   54         struct apm_ent          self;
   55         int                     tivo_series1;
   56 };
   57 
   58 struct g_part_apm_entry {
   59         struct g_part_entry     base;
   60         struct apm_ent          ent;
   61 };
   62 
   63 static int g_part_apm_add(struct g_part_table *, struct g_part_entry *,
   64     struct g_part_parms *);
   65 static int g_part_apm_create(struct g_part_table *, struct g_part_parms *);
   66 static int g_part_apm_destroy(struct g_part_table *, struct g_part_parms *);
   67 static void g_part_apm_dumpconf(struct g_part_table *, struct g_part_entry *,
   68     struct sbuf *, const char *);
   69 static int g_part_apm_dumpto(struct g_part_table *, struct g_part_entry *);
   70 static int g_part_apm_modify(struct g_part_table *, struct g_part_entry *,
   71     struct g_part_parms *);
   72 static const char *g_part_apm_name(struct g_part_table *, struct g_part_entry *,
   73     char *, size_t);
   74 static int g_part_apm_probe(struct g_part_table *, struct g_consumer *);
   75 static int g_part_apm_read(struct g_part_table *, struct g_consumer *);
   76 static const char *g_part_apm_type(struct g_part_table *, struct g_part_entry *,
   77     char *, size_t);
   78 static int g_part_apm_write(struct g_part_table *, struct g_consumer *);
   79 static int g_part_apm_resize(struct g_part_table *, struct g_part_entry *,
   80     struct g_part_parms *);
   81 
   82 static kobj_method_t g_part_apm_methods[] = {
   83         KOBJMETHOD(g_part_add,          g_part_apm_add),
   84         KOBJMETHOD(g_part_create,       g_part_apm_create),
   85         KOBJMETHOD(g_part_destroy,      g_part_apm_destroy),
   86         KOBJMETHOD(g_part_dumpconf,     g_part_apm_dumpconf),
   87         KOBJMETHOD(g_part_dumpto,       g_part_apm_dumpto),
   88         KOBJMETHOD(g_part_modify,       g_part_apm_modify),
   89         KOBJMETHOD(g_part_resize,       g_part_apm_resize),
   90         KOBJMETHOD(g_part_name,         g_part_apm_name),
   91         KOBJMETHOD(g_part_probe,        g_part_apm_probe),
   92         KOBJMETHOD(g_part_read,         g_part_apm_read),
   93         KOBJMETHOD(g_part_type,         g_part_apm_type),
   94         KOBJMETHOD(g_part_write,        g_part_apm_write),
   95         { 0, 0 }
   96 };
   97 
   98 static struct g_part_scheme g_part_apm_scheme = {
   99         "APM",
  100         g_part_apm_methods,
  101         sizeof(struct g_part_apm_table),
  102         .gps_entrysz = sizeof(struct g_part_apm_entry),
  103         .gps_minent = 16,
  104         .gps_maxent = 4096,
  105 };
  106 G_PART_SCHEME_DECLARE(g_part_apm);
  107 
  108 static void
  109 swab(char *buf, size_t bufsz)
  110 {
  111         int i;
  112         char ch;
  113 
  114         for (i = 0; i < bufsz; i += 2) {
  115                 ch = buf[i];
  116                 buf[i] = buf[i + 1];
  117                 buf[i + 1] = ch;
  118         }
  119 }
  120 
  121 static int
  122 apm_parse_type(const char *type, char *buf, size_t bufsz)
  123 {
  124         const char *alias;
  125 
  126         if (type[0] == '!') {
  127                 type++;
  128                 if (strlen(type) > bufsz)
  129                         return (EINVAL);
  130                 if (!strcmp(type, APM_ENT_TYPE_SELF) ||
  131                     !strcmp(type, APM_ENT_TYPE_UNUSED))
  132                         return (EINVAL);
  133                 strncpy(buf, type, bufsz);
  134                 return (0);
  135         }
  136         alias = g_part_alias_name(G_PART_ALIAS_APPLE_BOOT);
  137         if (!strcasecmp(type, alias)) {
  138                 strcpy(buf, APM_ENT_TYPE_APPLE_BOOT);
  139                 return (0);
  140         }
  141         alias = g_part_alias_name(G_PART_ALIAS_APPLE_HFS);
  142         if (!strcasecmp(type, alias)) {
  143                 strcpy(buf, APM_ENT_TYPE_APPLE_HFS);
  144                 return (0);
  145         }
  146         alias = g_part_alias_name(G_PART_ALIAS_APPLE_UFS);
  147         if (!strcasecmp(type, alias)) {
  148                 strcpy(buf, APM_ENT_TYPE_APPLE_UFS);
  149                 return (0);
  150         }
  151         alias = g_part_alias_name(G_PART_ALIAS_FREEBSD_BOOT);
  152         if (!strcasecmp(type, alias)) {
  153                 strcpy(buf, APM_ENT_TYPE_APPLE_BOOT);
  154                 return (0);
  155         }
  156         alias = g_part_alias_name(G_PART_ALIAS_FREEBSD);
  157         if (!strcasecmp(type, alias)) {
  158                 strcpy(buf, APM_ENT_TYPE_FREEBSD);
  159                 return (0);
  160         }
  161         alias = g_part_alias_name(G_PART_ALIAS_FREEBSD_NANDFS);
  162         if (!strcasecmp(type, alias)) {
  163                 strcpy(buf, APM_ENT_TYPE_FREEBSD_NANDFS);
  164                 return (0);
  165         }
  166         alias = g_part_alias_name(G_PART_ALIAS_FREEBSD_SWAP);
  167         if (!strcasecmp(type, alias)) {
  168                 strcpy(buf, APM_ENT_TYPE_FREEBSD_SWAP);
  169                 return (0);
  170         }
  171         alias = g_part_alias_name(G_PART_ALIAS_FREEBSD_UFS);
  172         if (!strcasecmp(type, alias)) {
  173                 strcpy(buf, APM_ENT_TYPE_FREEBSD_UFS);
  174                 return (0);
  175         }
  176         alias = g_part_alias_name(G_PART_ALIAS_FREEBSD_VINUM);
  177         if (!strcasecmp(type, alias)) {
  178                 strcpy(buf, APM_ENT_TYPE_FREEBSD_VINUM);
  179                 return (0);
  180         }
  181         alias = g_part_alias_name(G_PART_ALIAS_FREEBSD_ZFS);
  182         if (!strcasecmp(type, alias)) {
  183                 strcpy(buf, APM_ENT_TYPE_FREEBSD_ZFS);
  184                 return (0);
  185         }
  186         return (EINVAL);
  187 }
  188 
  189 static int
  190 apm_read_ent(struct g_consumer *cp, uint32_t blk, struct apm_ent *ent,
  191     int tivo_series1)
  192 {
  193         struct g_provider *pp;
  194         char *buf;
  195         int error;
  196 
  197         pp = cp->provider;
  198         buf = g_read_data(cp, pp->sectorsize * blk, pp->sectorsize, &error);
  199         if (buf == NULL)
  200                 return (error);
  201         if (tivo_series1)
  202                 swab(buf, pp->sectorsize);
  203         ent->ent_sig = be16dec(buf);
  204         ent->ent_pmblkcnt = be32dec(buf + 4);
  205         ent->ent_start = be32dec(buf + 8);
  206         ent->ent_size = be32dec(buf + 12);
  207         bcopy(buf + 16, ent->ent_name, sizeof(ent->ent_name));
  208         bcopy(buf + 48, ent->ent_type, sizeof(ent->ent_type));
  209         g_free(buf);
  210         return (0);
  211 }
  212 
  213 static int
  214 g_part_apm_add(struct g_part_table *basetable, struct g_part_entry *baseentry, 
  215     struct g_part_parms *gpp)
  216 {
  217         struct g_part_apm_entry *entry;
  218         struct g_part_apm_table *table;
  219         int error;
  220 
  221         entry = (struct g_part_apm_entry *)baseentry;
  222         table = (struct g_part_apm_table *)basetable;
  223         entry->ent.ent_sig = APM_ENT_SIG;
  224         entry->ent.ent_pmblkcnt = table->self.ent_pmblkcnt;
  225         entry->ent.ent_start = gpp->gpp_start;
  226         entry->ent.ent_size = gpp->gpp_size;
  227         if (baseentry->gpe_deleted) {
  228                 bzero(entry->ent.ent_type, sizeof(entry->ent.ent_type));
  229                 bzero(entry->ent.ent_name, sizeof(entry->ent.ent_name));
  230         }
  231         error = apm_parse_type(gpp->gpp_type, entry->ent.ent_type,
  232             sizeof(entry->ent.ent_type));
  233         if (error)
  234                 return (error);
  235         if (gpp->gpp_parms & G_PART_PARM_LABEL) {
  236                 if (strlen(gpp->gpp_label) > sizeof(entry->ent.ent_name))
  237                         return (EINVAL);
  238                 strncpy(entry->ent.ent_name, gpp->gpp_label,
  239                     sizeof(entry->ent.ent_name));
  240         }
  241         if (baseentry->gpe_index >= table->self.ent_pmblkcnt)
  242                 table->self.ent_pmblkcnt = baseentry->gpe_index + 1;
  243         KASSERT(table->self.ent_size >= table->self.ent_pmblkcnt,
  244             ("%s", __func__));
  245         KASSERT(table->self.ent_size > baseentry->gpe_index,
  246             ("%s", __func__));
  247         return (0);
  248 }
  249 
  250 static int
  251 g_part_apm_create(struct g_part_table *basetable, struct g_part_parms *gpp)
  252 {
  253         struct g_provider *pp;
  254         struct g_part_apm_table *table;
  255         uint32_t last;
  256 
  257         /* We don't nest, which means that our depth should be 0. */
  258         if (basetable->gpt_depth != 0)
  259                 return (ENXIO);
  260 
  261         table = (struct g_part_apm_table *)basetable;
  262         pp = gpp->gpp_provider;
  263         if (pp->sectorsize != 512 ||
  264             pp->mediasize < (2 + 2 * basetable->gpt_entries) * pp->sectorsize)
  265                 return (ENOSPC);
  266 
  267         /* APM uses 32-bit LBAs. */
  268         last = MIN(pp->mediasize / pp->sectorsize, UINT32_MAX) - 1;
  269 
  270         basetable->gpt_first = 2 + basetable->gpt_entries;
  271         basetable->gpt_last = last;
  272 
  273         table->ddr.ddr_sig = APM_DDR_SIG;
  274         table->ddr.ddr_blksize = pp->sectorsize;
  275         table->ddr.ddr_blkcount = last + 1;
  276 
  277         table->self.ent_sig = APM_ENT_SIG;
  278         table->self.ent_pmblkcnt = basetable->gpt_entries + 1;
  279         table->self.ent_start = 1;
  280         table->self.ent_size = table->self.ent_pmblkcnt;
  281         strcpy(table->self.ent_name, "Apple");
  282         strcpy(table->self.ent_type, APM_ENT_TYPE_SELF);
  283         return (0);
  284 }
  285 
  286 static int
  287 g_part_apm_destroy(struct g_part_table *basetable, struct g_part_parms *gpp)
  288 {
  289 
  290         /* Wipe the first 2 sectors to clear the partitioning. */
  291         basetable->gpt_smhead |= 3;
  292         return (0);
  293 }
  294 
  295 static void
  296 g_part_apm_dumpconf(struct g_part_table *table, struct g_part_entry *baseentry,
  297     struct sbuf *sb, const char *indent)
  298 {
  299         union {
  300                 char name[APM_ENT_NAMELEN + 1];
  301                 char type[APM_ENT_TYPELEN + 1];
  302         } u;
  303         struct g_part_apm_entry *entry;
  304 
  305         entry = (struct g_part_apm_entry *)baseentry;
  306         if (indent == NULL) {
  307                 /* conftxt: libdisk compatibility */
  308                 sbuf_printf(sb, " xs APPLE xt %s", entry->ent.ent_type);
  309         } else if (entry != NULL) {
  310                 /* confxml: partition entry information */
  311                 strncpy(u.name, entry->ent.ent_name, APM_ENT_NAMELEN);
  312                 u.name[APM_ENT_NAMELEN] = '\0';
  313                 sbuf_printf(sb, "%s<label>%s</label>\n", indent, u.name);
  314                 strncpy(u.type, entry->ent.ent_type, APM_ENT_TYPELEN);
  315                 u.type[APM_ENT_TYPELEN] = '\0';
  316                 sbuf_printf(sb, "%s<rawtype>%s</rawtype>\n", indent, u.type);
  317         } else {
  318                 /* confxml: scheme information */
  319         }
  320 }
  321 
  322 static int
  323 g_part_apm_dumpto(struct g_part_table *table, struct g_part_entry *baseentry)
  324 {
  325         struct g_part_apm_entry *entry;
  326 
  327         entry = (struct g_part_apm_entry *)baseentry;
  328         return ((!strcmp(entry->ent.ent_type, APM_ENT_TYPE_FREEBSD_SWAP))
  329             ? 1 : 0);
  330 }
  331 
  332 static int
  333 g_part_apm_modify(struct g_part_table *basetable,
  334     struct g_part_entry *baseentry, struct g_part_parms *gpp)
  335 {
  336         struct g_part_apm_entry *entry;
  337         int error;
  338 
  339         entry = (struct g_part_apm_entry *)baseentry;
  340         if (gpp->gpp_parms & G_PART_PARM_LABEL) {
  341                 if (strlen(gpp->gpp_label) > sizeof(entry->ent.ent_name))
  342                         return (EINVAL);
  343         }
  344         if (gpp->gpp_parms & G_PART_PARM_TYPE) {
  345                 error = apm_parse_type(gpp->gpp_type, entry->ent.ent_type,
  346                     sizeof(entry->ent.ent_type));
  347                 if (error)
  348                         return (error);
  349         }
  350         if (gpp->gpp_parms & G_PART_PARM_LABEL) {
  351                 strncpy(entry->ent.ent_name, gpp->gpp_label,
  352                     sizeof(entry->ent.ent_name));
  353         }
  354         return (0);
  355 }
  356 
  357 static int
  358 g_part_apm_resize(struct g_part_table *basetable,
  359     struct g_part_entry *baseentry, struct g_part_parms *gpp)
  360 {
  361         struct g_part_apm_entry *entry;
  362 
  363         entry = (struct g_part_apm_entry *)baseentry;
  364         baseentry->gpe_end = baseentry->gpe_start + gpp->gpp_size - 1;
  365         entry->ent.ent_size = gpp->gpp_size;
  366 
  367         return (0);
  368 }
  369 
  370 static const char *
  371 g_part_apm_name(struct g_part_table *table, struct g_part_entry *baseentry,
  372     char *buf, size_t bufsz)
  373 {
  374 
  375         snprintf(buf, bufsz, "s%d", baseentry->gpe_index + 1);
  376         return (buf);
  377 }
  378 
  379 static int
  380 g_part_apm_probe(struct g_part_table *basetable, struct g_consumer *cp)
  381 {
  382         struct g_provider *pp;
  383         struct g_part_apm_table *table;
  384         char *buf;
  385         int error;
  386 
  387         /* We don't nest, which means that our depth should be 0. */
  388         if (basetable->gpt_depth != 0)
  389                 return (ENXIO);
  390 
  391         table = (struct g_part_apm_table *)basetable;
  392         table->tivo_series1 = 0;
  393         pp = cp->provider;
  394 
  395         /* Sanity-check the provider. */
  396         if (pp->mediasize < 4 * pp->sectorsize)
  397                 return (ENOSPC);
  398 
  399         /* Check that there's a Driver Descriptor Record (DDR). */
  400         buf = g_read_data(cp, 0L, pp->sectorsize, &error);
  401         if (buf == NULL)
  402                 return (error);
  403         if (be16dec(buf) == APM_DDR_SIG) {
  404                 /* Normal Apple DDR */
  405                 table->ddr.ddr_sig = be16dec(buf);
  406                 table->ddr.ddr_blksize = be16dec(buf + 2);
  407                 table->ddr.ddr_blkcount = be32dec(buf + 4);
  408                 g_free(buf);
  409                 if (table->ddr.ddr_blksize != pp->sectorsize)
  410                         return (ENXIO);
  411                 if (table->ddr.ddr_blkcount > pp->mediasize / pp->sectorsize)
  412                         return (ENXIO);
  413         } else {
  414                 /*
  415                  * Check for Tivo drives, which have no DDR and a different
  416                  * signature.  Those whose first two bytes are 14 92 are
  417                  * Series 2 drives, and aren't supported.  Those that start
  418                  * with 92 14 are series 1 drives and are supported.
  419                  */
  420                 if (be16dec(buf) != 0x9214) {
  421                         /* If this is 0x1492 it could be a series 2 drive */
  422                         g_free(buf);
  423                         return (ENXIO);
  424                 }
  425                 table->ddr.ddr_sig = APM_DDR_SIG;               /* XXX */
  426                 table->ddr.ddr_blksize = pp->sectorsize;        /* XXX */
  427                 table->ddr.ddr_blkcount =
  428                     MIN(pp->mediasize / pp->sectorsize, UINT32_MAX);
  429                 table->tivo_series1 = 1;
  430                 g_free(buf);
  431         }
  432 
  433         /* Check that there's a Partition Map. */
  434         error = apm_read_ent(cp, 1, &table->self, table->tivo_series1);
  435         if (error)
  436                 return (error);
  437         if (table->self.ent_sig != APM_ENT_SIG)
  438                 return (ENXIO);
  439         if (strcmp(table->self.ent_type, APM_ENT_TYPE_SELF))
  440                 return (ENXIO);
  441         if (table->self.ent_pmblkcnt >= table->ddr.ddr_blkcount)
  442                 return (ENXIO);
  443         return (G_PART_PROBE_PRI_NORM);
  444 }
  445 
  446 static int
  447 g_part_apm_read(struct g_part_table *basetable, struct g_consumer *cp)
  448 {
  449         struct apm_ent ent;
  450         struct g_part_apm_entry *entry;
  451         struct g_part_apm_table *table;
  452         int error, index;
  453 
  454         table = (struct g_part_apm_table *)basetable;
  455 
  456         basetable->gpt_first = table->self.ent_size + 1;
  457         basetable->gpt_last = table->ddr.ddr_blkcount - 1;
  458         basetable->gpt_entries = table->self.ent_size - 1;
  459 
  460         for (index = table->self.ent_pmblkcnt - 1; index > 0; index--) {
  461                 error = apm_read_ent(cp, index + 1, &ent, table->tivo_series1);
  462                 if (error)
  463                         continue;
  464                 if (!strcmp(ent.ent_type, APM_ENT_TYPE_UNUSED))
  465                         continue;
  466                 entry = (struct g_part_apm_entry *)g_part_new_entry(basetable,
  467                     index, ent.ent_start, ent.ent_start + ent.ent_size - 1);
  468                 entry->ent = ent;
  469         }
  470 
  471         return (0);
  472 }
  473 
  474 static const char *
  475 g_part_apm_type(struct g_part_table *basetable, struct g_part_entry *baseentry,
  476     char *buf, size_t bufsz)
  477 {
  478         struct g_part_apm_entry *entry;
  479         const char *type;
  480         size_t len;
  481 
  482         entry = (struct g_part_apm_entry *)baseentry;
  483         type = entry->ent.ent_type;
  484         if (!strcmp(type, APM_ENT_TYPE_APPLE_BOOT))
  485                 return (g_part_alias_name(G_PART_ALIAS_APPLE_BOOT));
  486         if (!strcmp(type, APM_ENT_TYPE_APPLE_HFS))
  487                 return (g_part_alias_name(G_PART_ALIAS_APPLE_HFS));
  488         if (!strcmp(type, APM_ENT_TYPE_APPLE_UFS))
  489                 return (g_part_alias_name(G_PART_ALIAS_APPLE_UFS));
  490         if (!strcmp(type, APM_ENT_TYPE_FREEBSD))
  491                 return (g_part_alias_name(G_PART_ALIAS_FREEBSD));
  492         if (!strcmp(type, APM_ENT_TYPE_FREEBSD_NANDFS))
  493                 return (g_part_alias_name(G_PART_ALIAS_FREEBSD_NANDFS));
  494         if (!strcmp(type, APM_ENT_TYPE_FREEBSD_SWAP))
  495                 return (g_part_alias_name(G_PART_ALIAS_FREEBSD_SWAP));
  496         if (!strcmp(type, APM_ENT_TYPE_FREEBSD_UFS))
  497                 return (g_part_alias_name(G_PART_ALIAS_FREEBSD_UFS));
  498         if (!strcmp(type, APM_ENT_TYPE_FREEBSD_VINUM))
  499                 return (g_part_alias_name(G_PART_ALIAS_FREEBSD_VINUM));
  500         if (!strcmp(type, APM_ENT_TYPE_FREEBSD_ZFS))
  501                 return (g_part_alias_name(G_PART_ALIAS_FREEBSD_ZFS));
  502         buf[0] = '!';
  503         len = MIN(sizeof(entry->ent.ent_type), bufsz - 2);
  504         bcopy(type, buf + 1, len);
  505         buf[len + 1] = '\0';
  506         return (buf);
  507 }
  508 
  509 static int
  510 g_part_apm_write(struct g_part_table *basetable, struct g_consumer *cp)
  511 {
  512         struct g_provider *pp;
  513         struct g_part_entry *baseentry;
  514         struct g_part_apm_entry *entry;
  515         struct g_part_apm_table *table;
  516         char *buf, *ptr;
  517         uint32_t index;
  518         int error;
  519         size_t tblsz;
  520 
  521         pp = cp->provider;
  522         table = (struct g_part_apm_table *)basetable;
  523         /*
  524          * Tivo Series 1 disk partitions are currently read-only.
  525          */
  526         if (table->tivo_series1)
  527                 return (EOPNOTSUPP);
  528 
  529         /* Write the DDR only when we're newly created. */
  530         if (basetable->gpt_created) {
  531                 buf = g_malloc(pp->sectorsize, M_WAITOK | M_ZERO);
  532                 be16enc(buf, table->ddr.ddr_sig);
  533                 be16enc(buf + 2, table->ddr.ddr_blksize);
  534                 be32enc(buf + 4, table->ddr.ddr_blkcount);
  535                 error = g_write_data(cp, 0, buf, pp->sectorsize);
  536                 g_free(buf);
  537                 if (error)
  538                         return (error);
  539         }
  540 
  541         /* Allocate the buffer for all entries */
  542         tblsz = table->self.ent_pmblkcnt;
  543         buf = g_malloc(tblsz * pp->sectorsize, M_WAITOK | M_ZERO);
  544 
  545         /* Fill the self entry */
  546         be16enc(buf, APM_ENT_SIG);
  547         be32enc(buf + 4, table->self.ent_pmblkcnt);
  548         be32enc(buf + 8, table->self.ent_start);
  549         be32enc(buf + 12, table->self.ent_size);
  550         bcopy(table->self.ent_name, buf + 16, sizeof(table->self.ent_name));
  551         bcopy(table->self.ent_type, buf + 48, sizeof(table->self.ent_type));
  552 
  553         baseentry = LIST_FIRST(&basetable->gpt_entry);
  554         for (index = 1; index < tblsz; index++) {
  555                 entry = (baseentry != NULL && index == baseentry->gpe_index)
  556                     ? (struct g_part_apm_entry *)baseentry : NULL;
  557                 ptr = buf + index * pp->sectorsize;
  558                 be16enc(ptr, APM_ENT_SIG);
  559                 be32enc(ptr + 4, table->self.ent_pmblkcnt);
  560                 if (entry != NULL && !baseentry->gpe_deleted) {
  561                         be32enc(ptr + 8, entry->ent.ent_start);
  562                         be32enc(ptr + 12, entry->ent.ent_size);
  563                         bcopy(entry->ent.ent_name, ptr + 16,
  564                             sizeof(entry->ent.ent_name));
  565                         bcopy(entry->ent.ent_type, ptr + 48,
  566                             sizeof(entry->ent.ent_type));
  567                 } else {
  568                         strcpy(ptr + 48, APM_ENT_TYPE_UNUSED);
  569                 }
  570                 if (entry != NULL)
  571                         baseentry = LIST_NEXT(baseentry, gpe_entry);
  572         }
  573 
  574         for (index = 0; index < tblsz; index += MAXPHYS / pp->sectorsize) {
  575                 error = g_write_data(cp, (1 + index) * pp->sectorsize,
  576                     buf + index * pp->sectorsize,
  577                     (tblsz - index > MAXPHYS / pp->sectorsize) ? MAXPHYS:
  578                     (tblsz - index) * pp->sectorsize);
  579                 if (error) {
  580                         g_free(buf);
  581                         return (error);
  582                 }
  583         }
  584         g_free(buf);
  585         return (0);
  586 }
Cache object: ad780f2e090c57bbd1aac2481aa46e98
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FreeBSD/Linux Kernel Cross Reference sys/geom/part/g_part_apm.c

FreeBSD/Linux Kernel Cross Reference
sys/geom/part/g_part_apm.c
