2 * Copyright (c) 2007 The DragonFly Project. All rights reserved.
4 * This code is derived from software contributed to The DragonFly Project
5 * by Matthew Dillon <dillon@backplane.com>
7 * Redistribution and use in source and binary forms, with or without
8 * modification, are permitted provided that the following conditions
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
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.
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
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31 * OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
35 #include <sys/param.h>
36 #include <sys/systm.h>
38 #include <sys/endian.h>
39 #include <sys/diskslice.h>
40 #include <sys/diskmbr.h>
43 #include <sys/malloc.h>
44 #include <sys/syslog.h>
46 #include <sys/device.h>
49 static void gpt_setslice(const char *sname, struct disk_info *info,
50 struct diskslice *sp, struct gpt_ent *sent);
53 * Handle GPT on raw disk. Note that GPTs are not recursive. The MBR is
54 * ignored once a GPT has been detected.
56 * GPTs always start at block #1, regardless of how the MBR has been set up.
57 * In fact, the MBR's starting block might be pointing to the boot partition
58 * in the GPT rather then to the start of the GPT.
60 * This routine is called from mbrinit() when a GPT has been detected.
63 gptinit(cdev_t dev, struct disk_info *info, struct diskslices **sspp)
65 struct buf *bp1 = NULL;
66 struct buf *bp2 = NULL;
70 struct diskslices *ssp;
78 uint32_t table_blocks;
83 * The GPT starts in sector 1.
86 dname = dev_dname(wdev);
87 bp1 = geteblk((int)info->d_media_blksize);
88 bp1->b_bio1.bio_offset = info->d_media_blksize;
89 bp1->b_bio1.bio_done = biodone_sync;
90 bp1->b_bio1.bio_flags |= BIO_SYNC;
91 bp1->b_bcount = info->d_media_blksize;
92 bp1->b_cmd = BUF_CMD_READ;
93 bp1->b_flags |= B_FAILONDIS;
94 dev_dstrategy(wdev, &bp1->b_bio1);
95 if (biowait(&bp1->b_bio1, "gptrd") != 0) {
96 kprintf("%s: reading GPT @ block 1: error %d\n",
103 * Header sanity check
105 gpt = (void *)bp1->b_data;
106 len = le32toh(gpt->hdr_size);
107 if (len < GPT_MIN_HDR_SIZE || len > info->d_media_blksize) {
108 kprintf("%s: Illegal GPT header size %d\n", dname, len);
113 crc = le32toh(gpt->hdr_crc_self);
114 gpt->hdr_crc_self = 0;
115 if (crc32(gpt, len) != crc) {
116 kprintf("%s: GPT CRC32 did not match\n", dname);
122 * Validate the partition table and its location, then read it
125 entries = le32toh(gpt->hdr_entries);
126 entsz = le32toh(gpt->hdr_entsz);
127 table_lba = le32toh(gpt->hdr_lba_table);
128 table_blocks = (entries * entsz + info->d_media_blksize - 1) /
129 info->d_media_blksize;
130 if (entries < 1 || entries > 128 ||
131 entsz < 128 || (entsz & 7) || entsz > MAXBSIZE / entries ||
132 table_lba < 2 || table_lba + table_blocks > info->d_media_blocks) {
133 kprintf("%s: GPT partition table is out of bounds\n", dname);
139 * XXX subject to device dma size limitations
141 bp2 = geteblk((int)(table_blocks * info->d_media_blksize));
142 bp2->b_bio1.bio_offset = (off_t)table_lba * info->d_media_blksize;
143 bp2->b_bio1.bio_done = biodone_sync;
144 bp2->b_bio1.bio_flags |= BIO_SYNC;
145 bp2->b_bcount = table_blocks * info->d_media_blksize;
146 bp2->b_cmd = BUF_CMD_READ;
147 bp2->b_flags |= B_FAILONDIS;
148 dev_dstrategy(wdev, &bp2->b_bio1);
149 if (biowait(&bp2->b_bio1, "gptrd") != 0) {
150 kprintf("%s: reading GPT partition table @ %lld: error %d\n",
152 (long long)bp2->b_bio1.bio_offset,
159 * We are passed a pointer to a minimal slices struct. Replace
160 * it with a maximal one (128 slices + special slices). Well,
161 * really there is only one special slice (the WHOLE_DISK_SLICE)
162 * since we use the compatibility slice for s0, but don't quibble.
165 kfree(*sspp, M_DEVBUF);
166 ssp = *sspp = dsmakeslicestruct(BASE_SLICE+128, info);
169 * Create a slice for each partition.
171 for (i = 0; i < (int)entries && i < 128; ++i) {
176 ent = (void *)((char *)bp2->b_data + i * entsz);
177 le_uuid_dec(&ent->ent_type, &sent.ent_type);
178 le_uuid_dec(&ent->ent_uuid, &sent.ent_uuid);
179 sent.ent_lba_start = le64toh(ent->ent_lba_start);
180 sent.ent_lba_end = le64toh(ent->ent_lba_end);
181 sent.ent_attr = le64toh(ent->ent_attr);
183 for (j = 0; j < NELEM(ent->ent_name); ++j)
184 sent.ent_name[j] = le16toh(ent->ent_name[j]);
187 * The COMPATIBILITY_SLICE is actually slice 0 (s0). This
188 * is a bit weird becaue the whole-disk slice is #1, so
189 * slice 1 (s1) starts at BASE_SLICE.
192 sp = &ssp->dss_slices[COMPATIBILITY_SLICE];
194 sp = &ssp->dss_slices[BASE_SLICE+i-1];
195 sname = dsname(dev, dkunit(dev), WHOLE_DISK_SLICE,
196 WHOLE_SLICE_PART, partname);
198 if (kuuid_is_nil(&sent.ent_type))
201 if (sent.ent_lba_start < table_lba + table_blocks ||
202 sent.ent_lba_end >= info->d_media_blocks ||
203 sent.ent_lba_start >= sent.ent_lba_end) {
204 kprintf("%s part %d: unavailable, bad start or "
208 gpt_setslice(sname, info, sp, &sent);
211 ssp->dss_nslices = BASE_SLICE + i;
216 bp1->b_flags |= B_INVAL | B_AGE;
220 bp2->b_flags |= B_INVAL | B_AGE;
230 gpt_setslice(const char *sname, struct disk_info *info, struct diskslice *sp,
231 struct gpt_ent *sent)
233 sp->ds_offset = sent->ent_lba_start;
234 sp->ds_size = sent->ent_lba_end + 1 - sent->ent_lba_start;
235 sp->ds_type = 1; /* XXX */
236 sp->ds_type_uuid = sent->ent_type;
237 sp->ds_stor_uuid = sent->ent_uuid;
238 sp->ds_reserved = 0; /* no reserved sectors */