bigbiff
7b4c7a681c
Break libblkid into 4 libraries: libblkid, libuuid, libutil-linux and libfdisk. This should help in later patch updates. Change-Id: I680d9a7feb031e5c29a603e9c58aff4b65826262
126 lines
2.9 KiB
C
126 lines
2.9 KiB
C
/*
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* sun (solaris-sparc) partition parsing code
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*
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* Copyright (C) 2009 Karel Zak <kzak@redhat.com>
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*
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* This file may be redistributed under the terms of the
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* GNU Lesser General Public License.
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*/
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#include <stdio.h>
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#include <string.h>
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#include <stdlib.h>
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#include <stdint.h>
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#include <stddef.h>
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#include "pt-sun.h"
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#include "partitions.h"
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static int probe_sun_pt(blkid_probe pr,
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const struct blkid_idmag *mag __attribute__((__unused__)))
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{
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struct sun_disklabel *l;
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struct sun_partition *p;
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blkid_parttable tab = NULL;
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blkid_partlist ls;
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uint16_t nparts;
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blkid_loff_t spc;
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int i, use_vtoc;
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l = (struct sun_disklabel *) blkid_probe_get_sector(pr, 0);
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if (!l) {
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if (errno)
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return -errno;
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goto nothing;
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}
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if (sun_pt_checksum(l)) {
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DBG(LOWPROBE, ul_debug(
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"detected corrupted sun disk label -- ignore"));
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goto nothing;
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}
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if (blkid_partitions_need_typeonly(pr))
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/* caller does not ask for details about partitions */
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return BLKID_PROBE_OK;
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ls = blkid_probe_get_partlist(pr);
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if (!ls)
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goto nothing;
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tab = blkid_partlist_new_parttable(ls, "sun", 0);
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if (!tab)
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goto err;
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/* sectors per cylinder (partition offset is in cylinders...) */
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spc = be16_to_cpu(l->nhead) * be16_to_cpu(l->nsect);
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DBG(LOWPROBE, ul_debug("Sun VTOC sanity=%u version=%u nparts=%u",
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be32_to_cpu(l->vtoc.sanity),
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be32_to_cpu(l->vtoc.version),
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be16_to_cpu(l->vtoc.nparts)));
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/* Check to see if we can use the VTOC table */
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use_vtoc = ((be32_to_cpu(l->vtoc.sanity) == SUN_VTOC_SANITY) &&
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(be32_to_cpu(l->vtoc.version) == SUN_VTOC_VERSION) &&
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(be16_to_cpu(l->vtoc.nparts) <= SUN_MAXPARTITIONS));
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/* Use 8 partition entries if not specified in validated VTOC */
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nparts = use_vtoc ? be16_to_cpu(l->vtoc.nparts) : SUN_MAXPARTITIONS;
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/*
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* So that old Linux-Sun partitions continue to work,
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* alow the VTOC to be used under the additional condition ...
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*/
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use_vtoc = use_vtoc || !(l->vtoc.sanity || l->vtoc.version || l->vtoc.nparts);
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for (i = 0, p = l->partitions; i < nparts; i++, p++) {
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blkid_loff_t start, size;
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uint16_t type = 0, flags = 0;
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blkid_partition par;
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start = be32_to_cpu(p->start_cylinder) * spc;
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size = be32_to_cpu(p->num_sectors);
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if (use_vtoc) {
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type = be16_to_cpu(l->vtoc.infos[i].id);
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flags = be16_to_cpu(l->vtoc.infos[i].flags);
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}
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if (type == SUN_TAG_WHOLEDISK || !size) {
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blkid_partlist_increment_partno(ls);
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continue;
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}
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par = blkid_partlist_add_partition(ls, tab, start, size);
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if (!par)
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goto err;
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if (type)
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blkid_partition_set_type(par, type);
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if (flags)
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blkid_partition_set_flags(par, flags);
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}
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return BLKID_PROBE_OK;
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nothing:
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return BLKID_PROBE_NONE;
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err:
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return -ENOMEM;
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}
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const struct blkid_idinfo sun_pt_idinfo =
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{
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.name = "sun",
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.probefunc = probe_sun_pt,
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.magics =
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{
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{
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.magic = "\xDA\xBE", /* big-endian magic string */
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.len = 2,
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.sboff = offsetof(struct sun_disklabel, magic)
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},
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{ NULL }
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}
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};
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