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/osf.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)  *  Copyright (C) 1991-1998  Linus Torvalds
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  8)  *  Re-organised Feb 1998 Russell King
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  9)  */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 10) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 11) #include "check.h"
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 12) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 13) #define MAX_OSF_PARTITIONS 18
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 14) #define DISKLABELMAGIC (0x82564557UL)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 15) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 16) int osf_partition(struct parsed_partitions *state)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 17) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 18) 	int i;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 19) 	int slot = 1;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 20) 	unsigned int npartitions;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 21) 	Sector sect;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 22) 	unsigned char *data;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 23) 	struct disklabel {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 24) 		__le32 d_magic;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 25) 		__le16 d_type,d_subtype;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 26) 		u8 d_typename[16];
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 27) 		u8 d_packname[16];
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 28) 		__le32 d_secsize;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 29) 		__le32 d_nsectors;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 30) 		__le32 d_ntracks;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 31) 		__le32 d_ncylinders;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 32) 		__le32 d_secpercyl;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 33) 		__le32 d_secprtunit;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 34) 		__le16 d_sparespertrack;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 35) 		__le16 d_sparespercyl;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 36) 		__le32 d_acylinders;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 37) 		__le16 d_rpm, d_interleave, d_trackskew, d_cylskew;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 38) 		__le32 d_headswitch, d_trkseek, d_flags;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 39) 		__le32 d_drivedata[5];
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 40) 		__le32 d_spare[5];
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 41) 		__le32 d_magic2;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 42) 		__le16 d_checksum;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 43) 		__le16 d_npartitions;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 44) 		__le32 d_bbsize, d_sbsize;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 45) 		struct d_partition {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 46) 			__le32 p_size;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 47) 			__le32 p_offset;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 48) 			__le32 p_fsize;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 49) 			u8  p_fstype;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 50) 			u8  p_frag;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 51) 			__le16 p_cpg;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 52) 		} d_partitions[MAX_OSF_PARTITIONS];
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 53) 	} * label;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 54) 	struct d_partition * partition;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 55) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 56) 	data = read_part_sector(state, 0, &sect);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 57) 	if (!data)
^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) 	label = (struct disklabel *) (data+64);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 61) 	partition = label->d_partitions;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 62) 	if (le32_to_cpu(label->d_magic) != DISKLABELMAGIC) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 63) 		put_dev_sector(sect);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 64) 		return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 65) 	}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 66) 	if (le32_to_cpu(label->d_magic2) != DISKLABELMAGIC) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 67) 		put_dev_sector(sect);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 68) 		return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 69) 	}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 70) 	npartitions = le16_to_cpu(label->d_npartitions);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 71) 	if (npartitions > MAX_OSF_PARTITIONS) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 72) 		put_dev_sector(sect);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 73) 		return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 74) 	}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 75) 	for (i = 0 ; i < npartitions; i++, partition++) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 76) 		if (slot == state->limit)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 77) 		        break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 78) 		if (le32_to_cpu(partition->p_size))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 79) 			put_partition(state, slot,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 80) 				le32_to_cpu(partition->p_offset),
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 81) 				le32_to_cpu(partition->p_size));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 82) 		slot++;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 83) 	}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 84) 	strlcat(state->pp_buf, "\n", PAGE_SIZE);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 85) 	put_dev_sector(sect);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 86) 	return 1;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 87) }