| bigbiff | 7b4c7a6 | 2015-01-01 19:44:14 -0500 | [diff] [blame] | 1 | /* |
| 2 | * sun (solaris-sparc) partition parsing code |
| 3 | * |
| 4 | * Copyright (C) 2009 Karel Zak <kzak@redhat.com> |
| 5 | * |
| 6 | * This file may be redistributed under the terms of the |
| 7 | * GNU Lesser General Public License. |
| 8 | */ |
| 9 | #include <stdio.h> |
| 10 | #include <string.h> |
| 11 | #include <stdlib.h> |
| 12 | #include <stdint.h> |
| 13 | #include <stddef.h> |
| 14 | |
| 15 | #include "pt-sun.h" |
| 16 | #include "partitions.h" |
| 17 | |
| 18 | static int probe_sun_pt(blkid_probe pr, |
| 19 | const struct blkid_idmag *mag __attribute__((__unused__))) |
| 20 | { |
| 21 | struct sun_disklabel *l; |
| 22 | struct sun_partition *p; |
| 23 | blkid_parttable tab = NULL; |
| 24 | blkid_partlist ls; |
| 25 | uint16_t nparts; |
| 26 | blkid_loff_t spc; |
| 27 | int i, use_vtoc; |
| 28 | |
| 29 | l = (struct sun_disklabel *) blkid_probe_get_sector(pr, 0); |
| 30 | if (!l) { |
| 31 | if (errno) |
| 32 | return -errno; |
| 33 | goto nothing; |
| 34 | } |
| 35 | |
| 36 | if (sun_pt_checksum(l)) { |
| 37 | DBG(LOWPROBE, ul_debug( |
| 38 | "detected corrupted sun disk label -- ignore")); |
| 39 | goto nothing; |
| 40 | } |
| 41 | |
| 42 | if (blkid_partitions_need_typeonly(pr)) |
| 43 | /* caller does not ask for details about partitions */ |
| 44 | return BLKID_PROBE_OK; |
| 45 | |
| 46 | ls = blkid_probe_get_partlist(pr); |
| 47 | if (!ls) |
| 48 | goto nothing; |
| 49 | |
| 50 | tab = blkid_partlist_new_parttable(ls, "sun", 0); |
| 51 | if (!tab) |
| 52 | goto err; |
| 53 | |
| 54 | /* sectors per cylinder (partition offset is in cylinders...) */ |
| 55 | spc = be16_to_cpu(l->nhead) * be16_to_cpu(l->nsect); |
| 56 | |
| 57 | DBG(LOWPROBE, ul_debug("Sun VTOC sanity=%u version=%u nparts=%u", |
| 58 | be32_to_cpu(l->vtoc.sanity), |
| 59 | be32_to_cpu(l->vtoc.version), |
| 60 | be16_to_cpu(l->vtoc.nparts))); |
| 61 | |
| 62 | /* Check to see if we can use the VTOC table */ |
| 63 | use_vtoc = ((be32_to_cpu(l->vtoc.sanity) == SUN_VTOC_SANITY) && |
| 64 | (be32_to_cpu(l->vtoc.version) == SUN_VTOC_VERSION) && |
| 65 | (be16_to_cpu(l->vtoc.nparts) <= SUN_MAXPARTITIONS)); |
| 66 | |
| 67 | /* Use 8 partition entries if not specified in validated VTOC */ |
| 68 | nparts = use_vtoc ? be16_to_cpu(l->vtoc.nparts) : SUN_MAXPARTITIONS; |
| 69 | |
| 70 | /* |
| 71 | * So that old Linux-Sun partitions continue to work, |
| 72 | * alow the VTOC to be used under the additional condition ... |
| 73 | */ |
| 74 | use_vtoc = use_vtoc || !(l->vtoc.sanity || l->vtoc.version || l->vtoc.nparts); |
| 75 | |
| 76 | for (i = 0, p = l->partitions; i < nparts; i++, p++) { |
| 77 | |
| 78 | blkid_loff_t start, size; |
| 79 | uint16_t type = 0, flags = 0; |
| 80 | blkid_partition par; |
| 81 | |
| 82 | start = be32_to_cpu(p->start_cylinder) * spc; |
| 83 | size = be32_to_cpu(p->num_sectors); |
| 84 | if (use_vtoc) { |
| 85 | type = be16_to_cpu(l->vtoc.infos[i].id); |
| 86 | flags = be16_to_cpu(l->vtoc.infos[i].flags); |
| 87 | } |
| 88 | |
| 89 | if (type == SUN_TAG_WHOLEDISK || !size) { |
| 90 | blkid_partlist_increment_partno(ls); |
| 91 | continue; |
| 92 | } |
| 93 | par = blkid_partlist_add_partition(ls, tab, start, size); |
| 94 | if (!par) |
| 95 | goto err; |
| 96 | |
| 97 | if (type) |
| 98 | blkid_partition_set_type(par, type); |
| 99 | if (flags) |
| 100 | blkid_partition_set_flags(par, flags); |
| 101 | } |
| 102 | return BLKID_PROBE_OK; |
| 103 | |
| 104 | nothing: |
| 105 | return BLKID_PROBE_NONE; |
| 106 | err: |
| 107 | return -ENOMEM; |
| 108 | } |
| 109 | |
| 110 | |
| 111 | const struct blkid_idinfo sun_pt_idinfo = |
| 112 | { |
| 113 | .name = "sun", |
| 114 | .probefunc = probe_sun_pt, |
| 115 | .magics = |
| 116 | { |
| 117 | { |
| 118 | .magic = "\xDA\xBE", /* big-endian magic string */ |
| 119 | .len = 2, |
| 120 | .sboff = offsetof(struct sun_disklabel, magic) |
| 121 | }, |
| 122 | { NULL } |
| 123 | } |
| 124 | }; |
| 125 | |