cachepc-linux

Fork of AMDESE/linux with modifications for CachePC side-channel attack
git clone https://git.sinitax.com/sinitax/cachepc-linux
Log | Files | Refs | README | LICENSE | sfeed.txt

sysv68.c (1955B)

      1// SPDX-License-Identifier: GPL-2.0
      2/*
      3 *  fs/partitions/sysv68.c
      4 *
      5 *  Copyright (C) 2007 Philippe De Muyter <phdm@macqel.be>
      6 */
      7
      8#include "check.h"
      9
     10/*
     11 *	Volume ID structure: on first 256-bytes sector of disk
     12 */
     13
     14struct volumeid {
     15	u8	vid_unused[248];
     16	u8	vid_mac[8];	/* ASCII string "MOTOROLA" */
     17};
     18
     19/*
     20 *	config block: second 256-bytes sector on disk
     21 */
     22
     23struct dkconfig {
     24	u8	ios_unused0[128];
     25	__be32	ios_slcblk;	/* Slice table block number */
     26	__be16	ios_slccnt;	/* Number of entries in slice table */
     27	u8	ios_unused1[122];
     28};
     29
     30/*
     31 *	combined volumeid and dkconfig block
     32 */
     33
     34struct dkblk0 {
     35	struct volumeid dk_vid;
     36	struct dkconfig dk_ios;
     37};
     38
     39/*
     40 *	Slice Table Structure
     41 */
     42
     43struct slice {
     44	__be32	nblocks;		/* slice size (in blocks) */
     45	__be32	blkoff;			/* block offset of slice */
     46};
     47
     48
     49int sysv68_partition(struct parsed_partitions *state)
     50{
     51	int i, slices;
     52	int slot = 1;
     53	Sector sect;
     54	unsigned char *data;
     55	struct dkblk0 *b;
     56	struct slice *slice;
     57	char tmp[64];
     58
     59	data = read_part_sector(state, 0, &sect);
     60	if (!data)
     61		return -1;
     62
     63	b = (struct dkblk0 *)data;
     64	if (memcmp(b->dk_vid.vid_mac, "MOTOROLA", sizeof(b->dk_vid.vid_mac))) {
     65		put_dev_sector(sect);
     66		return 0;
     67	}
     68	slices = be16_to_cpu(b->dk_ios.ios_slccnt);
     69	i = be32_to_cpu(b->dk_ios.ios_slcblk);
     70	put_dev_sector(sect);
     71
     72	data = read_part_sector(state, i, &sect);
     73	if (!data)
     74		return -1;
     75
     76	slices -= 1; /* last slice is the whole disk */
     77	snprintf(tmp, sizeof(tmp), "sysV68: %s(s%u)", state->name, slices);
     78	strlcat(state->pp_buf, tmp, PAGE_SIZE);
     79	slice = (struct slice *)data;
     80	for (i = 0; i < slices; i++, slice++) {
     81		if (slot == state->limit)
     82			break;
     83		if (be32_to_cpu(slice->nblocks)) {
     84			put_partition(state, slot,
     85				be32_to_cpu(slice->blkoff),
     86				be32_to_cpu(slice->nblocks));
     87			snprintf(tmp, sizeof(tmp), "(s%u)", i);
     88			strlcat(state->pp_buf, tmp, PAGE_SIZE);
     89		}
     90		slot++;
     91	}
     92	strlcat(state->pp_buf, "\n", PAGE_SIZE);
     93	put_dev_sector(sect);
     94	return 1;
     95}