/*

 * Solaris x86 partition parsing code

 *

 * Copyright (C) 2009 Karel Zak <kzak@redhat.com>

 *

 * This file may be redistributed under the terms of the

 * GNU Lesser General Public License.

 */

#include <stdio.h>

#include <string.h>

#include <stdlib.h>

#include <stdint.h>

#include "partitions.h"

/*

 * Solaris-x86 is always within primary dos partition (nested PT table).  The

 * solaris-x86 vtoc can be used to split the entire partition to "slices". The

 * offset (start) of the slice is always relatively to the primary dos

 * partition.

 *

 * Note that Solaris-SPARC uses entire disk with a different partitioning

 * scheme.

 */

/* some other implementation than Linux kernel assume 8 partitions only */

#define SOLARIS_MAXPARTITIONS 16

/* disklabel (vtoc) location  */

#define SOLARIS_SECTOR    1      /* in 512-sectors */

#define SOLARIS_OFFSET    (SOLARIS_SECTOR << 9)  /* in bytes */

#define SOLARIS_MAGICOFFSET (SOLARIS_OFFSET + 12) /* v_sanity offset in bytes */

/* slice tags */

#define SOLARIS_TAG_WHOLEDISK 5

struct solaris_slice {

  uint16_t s_tag;      /* ID tag of partition */

  uint16_t s_flag;     /* permission flags */

  uint32_t s_start;    /* start sector no of partition */

  uint32_t s_size;     /* # of blocks in partition */

} __attribute__((packed));

struct solaris_vtoc {

  unsigned int v_bootinfo[3];     /* info needed by mboot (unsupported) */

  uint32_t     v_sanity;          /* to verify vtoc sanity */

  uint32_t     v_version;         /* layout version */

  char         v_volume[8];       /* volume name */

  uint16_t     v_sectorsz;        /* sector size in bytes */

  uint16_t     v_nparts;          /* number of partitions */

  unsigned int v_reserved[10];    /* free space */

  struct solaris_slice v_slice[SOLARIS_MAXPARTITIONS]; /* slices */

  unsigned int timestamp[SOLARIS_MAXPARTITIONS]; /* timestamp (unsupported) */

  char         v_asciilabel[128]; /* for compatibility */

} __attribute__((packed));

static int probe_solaris_pt(blkid_probe pr,

    const struct blkid_idmag *mag __attribute__((__unused__)))

{

  struct solaris_vtoc *l; /* disk label */

  struct solaris_slice *p;  /* partition */

  blkid_parttable tab = NULL;

  blkid_partition parent;

  blkid_partlist ls;

  int i;

  uint16_t nparts;

  l = (struct solaris_vtoc *) blkid_probe_get_sector(pr, SOLARIS_SECTOR);

  if (!l) {

    if (errno)

      return -errno;

    goto nothing;

  }

  if (le32_to_cpu(l->v_version) != 1) {

    DBG(LOWPROBE, ul_debug(

      "WARNING: unsupported solaris x86 version %d, ignore",

      le32_to_cpu(l->v_version)));

    goto nothing;

  }

  if (blkid_partitions_need_typeonly(pr))

    /* caller does not ask for details about partitions */

    return BLKID_PROBE_OK;

  ls = blkid_probe_get_partlist(pr);

  if (!ls)

    goto nothing;

  parent = blkid_partlist_get_parent(ls);

  tab = blkid_partlist_new_parttable(ls, "solaris", SOLARIS_OFFSET);

  if (!tab)

    goto err;

  nparts = le16_to_cpu(l->v_nparts);

  if (nparts > SOLARIS_MAXPARTITIONS)

    nparts = SOLARIS_MAXPARTITIONS;

  for (i = 1, p = &l->v_slice[0]; i < nparts; i++, p++) {

    uint32_t start = le32_to_cpu(p->s_start);

    uint32_t size = le32_to_cpu(p->s_size);

    blkid_partition par;

    if (size == 0 || le16_to_cpu(p->s_tag) == SOLARIS_TAG_WHOLEDISK)

      continue;

    if (parent)

      /* Solaris slices are relative to the parent (primary

       * DOS partition) */

      start += blkid_partition_get_start(parent);

    if (parent && !blkid_is_nested_dimension(parent, start, size)) {

      DBG(LOWPROBE, ul_debug(

        "WARNING: solaris partition (%d) overflow "

        "detected, ignore", i));

      continue;

    }

    par = blkid_partlist_add_partition(ls, tab, start, size);

    if (!par)

      goto err;

    blkid_partition_set_type(par, le16_to_cpu(p->s_tag));

    blkid_partition_set_flags(par, le16_to_cpu(p->s_flag));

  }

  return BLKID_PROBE_OK;

nothing:

  return BLKID_PROBE_NONE;

err:

  return -ENOMEM;

}

const struct blkid_idinfo solaris_x86_pt_idinfo =

{

  .name   = "solaris",

  .probefunc  = probe_solaris_pt,

  .magics   =

  {

    {

      .magic = "\xEE\xDE\x0D\x60",  /* little-endian magic string */

      .len = 4,     /* v_sanity size in bytes */

      .sboff = SOLARIS_MAGICOFFSET  /* offset of v_sanity */

    },

    { NULL }

  }

};