cachepc-linux

Fork of AMDESE/linux with modifications for CachePC side-channel attack
git clone https://git.sinitax.com/sinitax/cachepc-linux
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ultrix.c (1205B)

      1// SPDX-License-Identifier: GPL-2.0
      2/*
      3 *  fs/partitions/ultrix.c
      4 *
      5 *  Code extracted from drivers/block/genhd.c
      6 *
      7 *  Re-organised Jul 1999 Russell King
      8 */
      9
     10#include "check.h"
     11
     12int ultrix_partition(struct parsed_partitions *state)
     13{
     14	int i;
     15	Sector sect;
     16	unsigned char *data;
     17	struct ultrix_disklabel {
     18		s32	pt_magic;	/* magic no. indicating part. info exits */
     19		s32	pt_valid;	/* set by driver if pt is current */
     20		struct  pt_info {
     21			s32		pi_nblocks; /* no. of sectors */
     22			u32		pi_blkoff;  /* block offset for start */
     23		} pt_part[8];
     24	} *label;
     25
     26#define PT_MAGIC	0x032957	/* Partition magic number */
     27#define PT_VALID	1		/* Indicates if struct is valid */
     28
     29	data = read_part_sector(state, (16384 - sizeof(*label))/512, &sect);
     30	if (!data)
     31		return -1;
     32	
     33	label = (struct ultrix_disklabel *)(data + 512 - sizeof(*label));
     34
     35	if (label->pt_magic == PT_MAGIC && label->pt_valid == PT_VALID) {
     36		for (i=0; i<8; i++)
     37			if (label->pt_part[i].pi_nblocks)
     38				put_partition(state, i+1, 
     39					      label->pt_part[i].pi_blkoff,
     40					      label->pt_part[i].pi_nblocks);
     41		put_dev_sector(sect);
     42		strlcat(state->pp_buf, "\n", PAGE_SIZE);
     43		return 1;
     44	} else {
     45		put_dev_sector(sect);
     46		return 0;
     47	}
     48}