]> CyberLeo.Net >> Repos - FreeBSD/releng/7.2.git/blob - sys/geom/part/g_part_apm.c
Create releng/7.2 from stable/7 in preparation for 7.2-RELEASE.
[FreeBSD/releng/7.2.git] / sys / geom / part / g_part_apm.c
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("$FreeBSD$");
29
30 #include <sys/param.h>
31 #include <sys/apm.h>
32 #include <sys/bio.h>
33 #include <sys/diskmbr.h>
34 #include <sys/endian.h>
35 #include <sys/kernel.h>
36 #include <sys/kobj.h>
37 #include <sys/limits.h>
38 #include <sys/lock.h>
39 #include <sys/malloc.h>
40 #include <sys/mutex.h>
41 #include <sys/queue.h>
42 #include <sys/sbuf.h>
43 #include <sys/systm.h>
44 #include <geom/geom.h>
45 #include <geom/part/g_part.h>
46
47 #include "g_part_if.h"
48
49 struct g_part_apm_table {
50         struct g_part_table     base;
51         struct apm_ddr          ddr;
52         struct apm_ent          self;
53         int                     tivo_series1;
54 };
55
56 struct g_part_apm_entry {
57         struct g_part_entry     base;
58         struct apm_ent          ent;
59 };
60
61 static int g_part_apm_add(struct g_part_table *, struct g_part_entry *,
62     struct g_part_parms *);
63 static int g_part_apm_create(struct g_part_table *, struct g_part_parms *);
64 static int g_part_apm_destroy(struct g_part_table *, struct g_part_parms *);
65 static void g_part_apm_dumpconf(struct g_part_table *, struct g_part_entry *,
66     struct sbuf *, const char *);
67 static int g_part_apm_dumpto(struct g_part_table *, struct g_part_entry *);
68 static int g_part_apm_modify(struct g_part_table *, struct g_part_entry *,
69     struct g_part_parms *);
70 static const char *g_part_apm_name(struct g_part_table *, struct g_part_entry *,
71     char *, size_t);
72 static int g_part_apm_probe(struct g_part_table *, struct g_consumer *);
73 static int g_part_apm_read(struct g_part_table *, struct g_consumer *);
74 static const char *g_part_apm_type(struct g_part_table *, struct g_part_entry *,
75     char *, size_t);
76 static int g_part_apm_write(struct g_part_table *, struct g_consumer *);
77
78 static kobj_method_t g_part_apm_methods[] = {
79         KOBJMETHOD(g_part_add,          g_part_apm_add),
80         KOBJMETHOD(g_part_create,       g_part_apm_create),
81         KOBJMETHOD(g_part_destroy,      g_part_apm_destroy),
82         KOBJMETHOD(g_part_dumpconf,     g_part_apm_dumpconf),
83         KOBJMETHOD(g_part_dumpto,       g_part_apm_dumpto),
84         KOBJMETHOD(g_part_modify,       g_part_apm_modify),
85         KOBJMETHOD(g_part_name,         g_part_apm_name),
86         KOBJMETHOD(g_part_probe,        g_part_apm_probe),
87         KOBJMETHOD(g_part_read,         g_part_apm_read),
88         KOBJMETHOD(g_part_type,         g_part_apm_type),
89         KOBJMETHOD(g_part_write,        g_part_apm_write),
90         { 0, 0 }
91 };
92
93 static struct g_part_scheme g_part_apm_scheme = {
94         "APM",
95         g_part_apm_methods,
96         sizeof(struct g_part_apm_table),
97         .gps_entrysz = sizeof(struct g_part_apm_entry),
98         .gps_minent = 16,
99         .gps_maxent = INT_MAX,
100 };
101 G_PART_SCHEME_DECLARE(g_part_apm);
102
103 static void
104 swab(char *buf, size_t bufsz)
105 {
106         int i;
107         char ch;
108
109         for (i = 0; i < bufsz; i += 2) {
110                 ch = buf[i];
111                 buf[i] = buf[i + 1];
112                 buf[i + 1] = ch;
113         }
114 }
115
116 static int
117 apm_parse_type(const char *type, char *buf, size_t bufsz)
118 {
119         const char *alias;
120
121         if (type[0] == '!') {
122                 type++;
123                 if (strlen(type) > bufsz)
124                         return (EINVAL);
125                 if (!strcmp(type, APM_ENT_TYPE_SELF) ||
126                     !strcmp(type, APM_ENT_TYPE_UNUSED))
127                         return (EINVAL);
128                 strncpy(buf, type, bufsz);
129                 return (0);
130         }
131         alias = g_part_alias_name(G_PART_ALIAS_FREEBSD);
132         if (!strcasecmp(type, alias)) {
133                 strcpy(buf, APM_ENT_TYPE_FREEBSD);
134                 return (0);
135         }
136         alias = g_part_alias_name(G_PART_ALIAS_FREEBSD_SWAP);
137         if (!strcasecmp(type, alias)) {
138                 strcpy(buf, APM_ENT_TYPE_FREEBSD_SWAP);
139                 return (0);
140         }
141         alias = g_part_alias_name(G_PART_ALIAS_FREEBSD_UFS);
142         if (!strcasecmp(type, alias)) {
143                 strcpy(buf, APM_ENT_TYPE_FREEBSD_UFS);
144                 return (0);
145         }
146         alias = g_part_alias_name(G_PART_ALIAS_FREEBSD_VINUM);
147         if (!strcasecmp(type, alias)) {
148                 strcpy(buf, APM_ENT_TYPE_FREEBSD_VINUM);
149                 return (0);
150         }
151         alias = g_part_alias_name(G_PART_ALIAS_FREEBSD_ZFS);
152         if (!strcasecmp(type, alias)) {
153                 strcpy(buf, APM_ENT_TYPE_FREEBSD_ZFS);
154                 return (0);
155         }
156         return (EINVAL);
157 }
158
159 static int
160 apm_read_ent(struct g_consumer *cp, uint32_t blk, struct apm_ent *ent,
161     int tivo_series1)
162 {
163         struct g_provider *pp;
164         char *buf;
165         int error;
166
167         pp = cp->provider;
168         buf = g_read_data(cp, pp->sectorsize * blk, pp->sectorsize, &error);
169         if (buf == NULL)
170                 return (error);
171         if (tivo_series1)
172                 swab(buf, pp->sectorsize);
173         ent->ent_sig = be16dec(buf);
174         ent->ent_pmblkcnt = be32dec(buf + 4);
175         ent->ent_start = be32dec(buf + 8);
176         ent->ent_size = be32dec(buf + 12);
177         bcopy(buf + 16, ent->ent_name, sizeof(ent->ent_name));
178         bcopy(buf + 48, ent->ent_type, sizeof(ent->ent_type));
179         g_free(buf);
180         return (0);
181 }
182
183 static int
184 g_part_apm_add(struct g_part_table *basetable, struct g_part_entry *baseentry, 
185     struct g_part_parms *gpp)
186 {
187         struct g_part_apm_entry *entry;
188         struct g_part_apm_table *table;
189         int error;
190
191         entry = (struct g_part_apm_entry *)baseentry;
192         table = (struct g_part_apm_table *)basetable;
193         entry->ent.ent_sig = APM_ENT_SIG;
194         entry->ent.ent_pmblkcnt = table->self.ent_pmblkcnt;
195         entry->ent.ent_start = gpp->gpp_start;
196         entry->ent.ent_size = gpp->gpp_size;
197         if (baseentry->gpe_deleted) {
198                 bzero(entry->ent.ent_type, sizeof(entry->ent.ent_type));
199                 bzero(entry->ent.ent_name, sizeof(entry->ent.ent_name));
200         }
201         error = apm_parse_type(gpp->gpp_type, entry->ent.ent_type,
202             sizeof(entry->ent.ent_type));
203         if (error)
204                 return (error);
205         if (gpp->gpp_parms & G_PART_PARM_LABEL) {
206                 if (strlen(gpp->gpp_label) > sizeof(entry->ent.ent_name))
207                         return (EINVAL);
208                 strncpy(entry->ent.ent_name, gpp->gpp_label,
209                     sizeof(entry->ent.ent_name));
210         }
211         return (0);
212 }
213
214 static int
215 g_part_apm_create(struct g_part_table *basetable, struct g_part_parms *gpp)
216 {
217         struct g_provider *pp;
218         struct g_part_apm_table *table;
219
220         table = (struct g_part_apm_table *)basetable;
221         pp = gpp->gpp_provider;
222         if (pp->sectorsize != 512 ||
223             pp->mediasize < (2 + 2 * basetable->gpt_entries) * pp->sectorsize)
224                 return (ENOSPC);
225
226         basetable->gpt_first = 2 + basetable->gpt_entries;
227         basetable->gpt_last = (pp->mediasize / pp->sectorsize) - 1;
228
229         table->ddr.ddr_sig = APM_DDR_SIG;
230         table->ddr.ddr_blksize = pp->sectorsize;
231         table->ddr.ddr_blkcount = basetable->gpt_last + 1;
232
233         table->self.ent_sig = APM_ENT_SIG;
234         table->self.ent_pmblkcnt = basetable->gpt_entries + 1;
235         table->self.ent_start = 1;
236         table->self.ent_size = table->self.ent_pmblkcnt;
237         strcpy(table->self.ent_name, "Apple");
238         strcpy(table->self.ent_type, APM_ENT_TYPE_SELF);
239         return (0);
240 }
241
242 static int
243 g_part_apm_destroy(struct g_part_table *basetable, struct g_part_parms *gpp)
244 {
245
246         /* Wipe the first 2 sectors to clear the partitioning. */
247         basetable->gpt_smhead |= 3;
248         return (0);
249 }
250
251 static void
252 g_part_apm_dumpconf(struct g_part_table *table, struct g_part_entry *baseentry,
253     struct sbuf *sb, const char *indent)
254 {
255         union {
256                 char name[APM_ENT_NAMELEN + 1];
257                 char type[APM_ENT_TYPELEN + 1];
258         } u;
259         struct g_part_apm_entry *entry;
260
261         entry = (struct g_part_apm_entry *)baseentry;
262         if (indent == NULL) {
263                 /* conftxt: libdisk compatibility */
264                 sbuf_printf(sb, " xs APPLE xt %s", entry->ent.ent_type);
265         } else if (entry != NULL) {
266                 /* confxml: partition entry information */
267                 strncpy(u.name, entry->ent.ent_name, APM_ENT_NAMELEN);
268                 u.name[APM_ENT_NAMELEN] = '\0';
269                 sbuf_printf(sb, "%s<label>%s</label>\n", indent, u.name);
270                 strncpy(u.type, entry->ent.ent_type, APM_ENT_TYPELEN);
271                 u.type[APM_ENT_TYPELEN] = '\0';
272                 sbuf_printf(sb, "%s<rawtype>%s</rawtype>\n", indent, u.type);
273         } else {
274                 /* confxml: scheme information */
275         }
276 }
277
278 static int
279 g_part_apm_dumpto(struct g_part_table *table, struct g_part_entry *baseentry)
280 {
281         struct g_part_apm_entry *entry;
282
283         entry = (struct g_part_apm_entry *)baseentry;
284         return ((!strcmp(entry->ent.ent_type, APM_ENT_TYPE_FREEBSD_SWAP))
285             ? 1 : 0);
286 }
287
288 static int
289 g_part_apm_modify(struct g_part_table *basetable,
290     struct g_part_entry *baseentry, struct g_part_parms *gpp)
291 {
292         struct g_part_apm_entry *entry;
293         int error;
294
295         entry = (struct g_part_apm_entry *)baseentry;
296         if (gpp->gpp_parms & G_PART_PARM_LABEL) {
297                 if (strlen(gpp->gpp_label) > sizeof(entry->ent.ent_name))
298                         return (EINVAL);
299         }
300         if (gpp->gpp_parms & G_PART_PARM_TYPE) {
301                 error = apm_parse_type(gpp->gpp_type, entry->ent.ent_type,
302                     sizeof(entry->ent.ent_type));
303                 if (error)
304                         return (error);
305         }
306         if (gpp->gpp_parms & G_PART_PARM_LABEL) {
307                 strncpy(entry->ent.ent_name, gpp->gpp_label,
308                     sizeof(entry->ent.ent_name));
309         }
310         return (0);
311 }
312
313 static const char *
314 g_part_apm_name(struct g_part_table *table, struct g_part_entry *baseentry,
315     char *buf, size_t bufsz)
316 {
317
318         snprintf(buf, bufsz, "s%d", baseentry->gpe_index + 1);
319         return (buf);
320 }
321
322 static int
323 g_part_apm_probe(struct g_part_table *basetable, struct g_consumer *cp)
324 {
325         struct g_provider *pp;
326         struct g_part_apm_table *table;
327         char *buf;
328         int error;
329
330         /* We don't nest, which means that our depth should be 0. */
331         if (basetable->gpt_depth != 0)
332                 return (ENXIO);
333
334         table = (struct g_part_apm_table *)basetable;
335         table->tivo_series1 = 0;
336         pp = cp->provider;
337
338         /* Sanity-check the provider. */
339         if (pp->mediasize < 4 * pp->sectorsize)
340                 return (ENOSPC);
341
342         /* Check that there's a Driver Descriptor Record (DDR). */
343         buf = g_read_data(cp, 0L, pp->sectorsize, &error);
344         if (buf == NULL)
345                 return (error);
346         if (be16dec(buf) == be16toh(APM_DDR_SIG)) {
347                 /* Normal Apple DDR */
348                 table->ddr.ddr_sig = be16dec(buf);
349                 table->ddr.ddr_blksize = be16dec(buf + 2);
350                 table->ddr.ddr_blkcount = be32dec(buf + 4);
351                 g_free(buf);
352                 if (table->ddr.ddr_blksize != pp->sectorsize)
353                         return (ENXIO);
354         } else {
355                 /*
356                  * Check for Tivo drives, which have no DDR and a different
357                  * signature.  Those whose first two bytes are 14 92 are
358                  * Series 2 drives, and aren't supported.  Those that start
359                  * with 92 14 are series 1 drives and are supported.
360                  */
361                 if (be16dec(buf) != 0x9214) {
362                         /* If this is 0x1492 it could be a series 2 drive */
363                         g_free(buf);
364                         return (ENXIO);
365                 }
366                 table->ddr.ddr_sig = APM_DDR_SIG;               /* XXX */
367                 table->ddr.ddr_blksize = pp->sectorsize;        /* XXX */
368                 table->ddr.ddr_blkcount = pp->mediasize / pp->sectorsize;/* XXX */
369                 table->tivo_series1 = 1;
370                 g_free(buf);
371         }
372
373         /* Check that there's a Partition Map. */
374         error = apm_read_ent(cp, 1, &table->self, table->tivo_series1);
375         if (error)
376                 return (error);
377         if (table->self.ent_sig != APM_ENT_SIG)
378                 return (ENXIO);
379         if (strcmp(table->self.ent_type, APM_ENT_TYPE_SELF))
380                 return (ENXIO);
381         if (table->self.ent_pmblkcnt >= table->ddr.ddr_blkcount)
382                 return (ENXIO);
383         return (G_PART_PROBE_PRI_NORM);
384 }
385
386 static int
387 g_part_apm_read(struct g_part_table *basetable, struct g_consumer *cp)
388 {
389         struct apm_ent ent;
390         struct g_part_apm_entry *entry;
391         struct g_part_apm_table *table;
392         int error, index;
393
394         table = (struct g_part_apm_table *)basetable;
395
396         basetable->gpt_first = table->self.ent_pmblkcnt + 1;
397         basetable->gpt_last = table->ddr.ddr_blkcount - 1;
398         basetable->gpt_entries = table->self.ent_pmblkcnt - 1;
399
400         for (index = table->self.ent_pmblkcnt - 1; index > 0; index--) {
401                 error = apm_read_ent(cp, index + 1, &ent, table->tivo_series1);
402                 if (error)
403                         continue;
404                 if (!strcmp(ent.ent_type, APM_ENT_TYPE_UNUSED))
405                         continue;
406                 entry = (struct g_part_apm_entry *)g_part_new_entry(basetable,
407                     index, ent.ent_start, ent.ent_start + ent.ent_size - 1);
408                 entry->ent = ent;
409         }
410
411         return (0);
412 }
413
414 static const char *
415 g_part_apm_type(struct g_part_table *basetable, struct g_part_entry *baseentry,
416     char *buf, size_t bufsz)
417 {
418         struct g_part_apm_entry *entry;
419         const char *type;
420         size_t len;
421
422         entry = (struct g_part_apm_entry *)baseentry;
423         type = entry->ent.ent_type;
424         if (!strcmp(type, APM_ENT_TYPE_FREEBSD))
425                 return (g_part_alias_name(G_PART_ALIAS_FREEBSD));
426         if (!strcmp(type, APM_ENT_TYPE_FREEBSD_SWAP))
427                 return (g_part_alias_name(G_PART_ALIAS_FREEBSD_SWAP));
428         if (!strcmp(type, APM_ENT_TYPE_FREEBSD_UFS))
429                 return (g_part_alias_name(G_PART_ALIAS_FREEBSD_UFS));
430         if (!strcmp(type, APM_ENT_TYPE_FREEBSD_VINUM))
431                 return (g_part_alias_name(G_PART_ALIAS_FREEBSD_VINUM));
432         if (!strcmp(type, APM_ENT_TYPE_FREEBSD_ZFS))
433                 return (g_part_alias_name(G_PART_ALIAS_FREEBSD_ZFS));
434         buf[0] = '!';
435         len = MIN(sizeof(entry->ent.ent_type), bufsz - 2);
436         bcopy(type, buf + 1, len);
437         buf[len + 1] = '\0';
438         return (buf);
439 }
440
441 static int
442 g_part_apm_write(struct g_part_table *basetable, struct g_consumer *cp)
443 {
444         char buf[512];
445         struct g_part_entry *baseentry;
446         struct g_part_apm_entry *entry;
447         struct g_part_apm_table *table;
448         int error, index;
449
450         table = (struct g_part_apm_table *)basetable;
451         /*
452          * Tivo Series 1 disk partitions are currently read-only.
453          */
454         if (table->tivo_series1)
455                 return (EOPNOTSUPP);
456         bzero(buf, sizeof(buf));
457
458         /* Write the DDR and 'self' entry only when we're newly created. */
459         if (basetable->gpt_created) {
460                 be16enc(buf, table->ddr.ddr_sig);
461                 be16enc(buf + 2, table->ddr.ddr_blksize);
462                 be32enc(buf + 4, table->ddr.ddr_blkcount);
463                 error = g_write_data(cp, 0, buf, sizeof(buf));
464                 if (error)
465                         return (error);
466         }
467
468         be16enc(buf, table->self.ent_sig);
469         be16enc(buf + 2, 0);
470         be32enc(buf + 4, table->self.ent_pmblkcnt);
471
472         if (basetable->gpt_created) {
473                 be32enc(buf + 8, table->self.ent_start);
474                 be32enc(buf + 12, table->self.ent_size);
475                 bcopy(table->self.ent_name, buf + 16,
476                     sizeof(table->self.ent_name));
477                 bcopy(table->self.ent_type, buf + 48,
478                     sizeof(table->self.ent_type));
479                 error = g_write_data(cp, 512, buf, sizeof(buf));
480                 if (error)
481                         return (error);
482         }
483
484         baseentry = LIST_FIRST(&basetable->gpt_entry);
485         for (index = 1; index <= basetable->gpt_entries; index++) {
486                 entry = (baseentry != NULL && index == baseentry->gpe_index)
487                     ? (struct g_part_apm_entry *)baseentry : NULL;
488                 if (entry != NULL && !baseentry->gpe_deleted) {
489                         be32enc(buf + 8, entry->ent.ent_start);
490                         be32enc(buf + 12, entry->ent.ent_size);
491                         bcopy(entry->ent.ent_name, buf + 16,
492                             sizeof(entry->ent.ent_name));
493                         bcopy(entry->ent.ent_type, buf + 48,
494                             sizeof(entry->ent.ent_type));
495                 } else {
496                         bzero(buf + 8, 4 + 4 + 32 + 32);
497                         strcpy(buf + 48, APM_ENT_TYPE_UNUSED);
498                 }
499                 error = g_write_data(cp, (index + 1) * 512, buf, sizeof(buf));
500                 if (error)
501                         return (error);
502                 if (entry != NULL)
503                         baseentry = LIST_NEXT(baseentry, gpe_entry);
504         }
505
506         return (0);
507 }