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/karma.c
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  4)  *  Rio Karma partition info.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  5)  *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  6)  *  Copyright (C) 2006 Bob Copeland (me@bobcopeland.com)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  7)  *  based on osf.c
^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) #include <linux/compiler.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 12) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 13) #define KARMA_LABEL_MAGIC		0xAB56
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 14) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 15) int karma_partition(struct parsed_partitions *state)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 16) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 17) 	int i;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 18) 	int slot = 1;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 19) 	Sector sect;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 20) 	unsigned char *data;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 21) 	struct disklabel {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 22) 		u8 d_reserved[270];
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 23) 		struct d_partition {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 24) 			__le32 p_res;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 25) 			u8 p_fstype;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 26) 			u8 p_res2[3];
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 27) 			__le32 p_offset;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 28) 			__le32 p_size;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 29) 		} d_partitions[2];
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 30) 		u8 d_blank[208];
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 31) 		__le16 d_magic;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 32) 	} __packed *label;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 33) 	struct d_partition *p;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 34) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 35) 	data = read_part_sector(state, 0, &sect);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 36) 	if (!data)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 37) 		return -1;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 38) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 39) 	label = (struct disklabel *)data;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 40) 	if (le16_to_cpu(label->d_magic) != KARMA_LABEL_MAGIC) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 41) 		put_dev_sector(sect);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 42) 		return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 43) 	}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 44) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 45) 	p = label->d_partitions;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 46) 	for (i = 0 ; i < 2; i++, p++) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 47) 		if (slot == state->limit)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 48) 			break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 49) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 50) 		if (p->p_fstype == 0x4d && le32_to_cpu(p->p_size)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 51) 			put_partition(state, slot, le32_to_cpu(p->p_offset),
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 52) 				le32_to_cpu(p->p_size));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 53) 		}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 54) 		slot++;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 55) 	}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 56) 	strlcat(state->pp_buf, "\n", PAGE_SIZE);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 57) 	put_dev_sector(sect);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 58) 	return 1;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 59) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 60)