1*4882a593Smuzhiyun // SPDX-License-Identifier: GPL-2.0 2*4882a593Smuzhiyun /* 3*4882a593Smuzhiyun * fs/partitions/ultrix.c 4*4882a593Smuzhiyun * 5*4882a593Smuzhiyun * Code extracted from drivers/block/genhd.c 6*4882a593Smuzhiyun * 7*4882a593Smuzhiyun * Re-organised Jul 1999 Russell King 8*4882a593Smuzhiyun */ 9*4882a593Smuzhiyun 10*4882a593Smuzhiyun #include "check.h" 11*4882a593Smuzhiyun ultrix_partition(struct parsed_partitions * state)12*4882a593Smuzhiyunint ultrix_partition(struct parsed_partitions *state) 13*4882a593Smuzhiyun { 14*4882a593Smuzhiyun int i; 15*4882a593Smuzhiyun Sector sect; 16*4882a593Smuzhiyun unsigned char *data; 17*4882a593Smuzhiyun struct ultrix_disklabel { 18*4882a593Smuzhiyun s32 pt_magic; /* magic no. indicating part. info exits */ 19*4882a593Smuzhiyun s32 pt_valid; /* set by driver if pt is current */ 20*4882a593Smuzhiyun struct pt_info { 21*4882a593Smuzhiyun s32 pi_nblocks; /* no. of sectors */ 22*4882a593Smuzhiyun u32 pi_blkoff; /* block offset for start */ 23*4882a593Smuzhiyun } pt_part[8]; 24*4882a593Smuzhiyun } *label; 25*4882a593Smuzhiyun 26*4882a593Smuzhiyun #define PT_MAGIC 0x032957 /* Partition magic number */ 27*4882a593Smuzhiyun #define PT_VALID 1 /* Indicates if struct is valid */ 28*4882a593Smuzhiyun 29*4882a593Smuzhiyun data = read_part_sector(state, (16384 - sizeof(*label))/512, §); 30*4882a593Smuzhiyun if (!data) 31*4882a593Smuzhiyun return -1; 32*4882a593Smuzhiyun 33*4882a593Smuzhiyun label = (struct ultrix_disklabel *)(data + 512 - sizeof(*label)); 34*4882a593Smuzhiyun 35*4882a593Smuzhiyun if (label->pt_magic == PT_MAGIC && label->pt_valid == PT_VALID) { 36*4882a593Smuzhiyun for (i=0; i<8; i++) 37*4882a593Smuzhiyun if (label->pt_part[i].pi_nblocks) 38*4882a593Smuzhiyun put_partition(state, i+1, 39*4882a593Smuzhiyun label->pt_part[i].pi_blkoff, 40*4882a593Smuzhiyun label->pt_part[i].pi_nblocks); 41*4882a593Smuzhiyun put_dev_sector(sect); 42*4882a593Smuzhiyun strlcat(state->pp_buf, "\n", PAGE_SIZE); 43*4882a593Smuzhiyun return 1; 44*4882a593Smuzhiyun } else { 45*4882a593Smuzhiyun put_dev_sector(sect); 46*4882a593Smuzhiyun return 0; 47*4882a593Smuzhiyun } 48*4882a593Smuzhiyun } 49