Orange Pi5 kernel

^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  1) // SPDX-License-Identifier: GPL-2.0
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  2) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  3)  *  fs/partitions/ultrix.c
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  4)  *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  5)  *  Code extracted from drivers/block/genhd.c
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  6)  *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  7)  *  Re-organised Jul 1999 Russell King
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  8)  */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  9) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 10) #include "check.h"
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 11) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 12) int ultrix_partition(struct parsed_partitions *state)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 13) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 14) 	int i;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 15) 	Sector sect;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 16) 	unsigned char *data;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 17) 	struct ultrix_disklabel {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 18) 		s32	pt_magic;	/* magic no. indicating part. info exits */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 19) 		s32	pt_valid;	/* set by driver if pt is current */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 20) 		struct  pt_info {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 21) 			s32		pi_nblocks; /* no. of sectors */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 22) 			u32		pi_blkoff;  /* block offset for start */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 23) 		} pt_part[8];
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 24) 	} *label;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 25) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 26) #define PT_MAGIC	0x032957	/* Partition magic number */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 27) #define PT_VALID	1		/* Indicates if struct is valid */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 28) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 29) 	data = read_part_sector(state, (16384 - sizeof(*label))/512, &sect);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 30) 	if (!data)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 31) 		return -1;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 32) 	
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 33) 	label = (struct ultrix_disklabel *)(data + 512 - sizeof(*label));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 34) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 35) 	if (label->pt_magic == PT_MAGIC && label->pt_valid == PT_VALID) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 36) 		for (i=0; i<8; i++)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 37) 			if (label->pt_part[i].pi_nblocks)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 38) 				put_partition(state, i+1, 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 39) 					      label->pt_part[i].pi_blkoff,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 40) 					      label->pt_part[i].pi_nblocks);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 41) 		put_dev_sector(sect);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 42) 		strlcat(state->pp_buf, "\n", PAGE_SIZE);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 43) 		return 1;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 44) 	} else {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 45) 		put_dev_sector(sect);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 46) 		return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 47) 	}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 48) }