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/sysv68.c
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  4)  *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  5)  *  Copyright (C) 2007 Philippe De Muyter <phdm@macqel.be>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  6)  */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  7) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  8) #include "check.h"
^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)  *	Volume ID structure: on first 256-bytes sector of disk
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 12)  */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 13) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 14) struct volumeid {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 15) 	u8	vid_unused[248];
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 16) 	u8	vid_mac[8];	/* ASCII string "MOTOROLA" */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 17) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 18) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 19) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 20)  *	config block: second 256-bytes sector on disk
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 21)  */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 22) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 23) struct dkconfig {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 24) 	u8	ios_unused0[128];
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 25) 	__be32	ios_slcblk;	/* Slice table block number */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 26) 	__be16	ios_slccnt;	/* Number of entries in slice table */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 27) 	u8	ios_unused1[122];
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 28) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 29) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 30) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 31)  *	combined volumeid and dkconfig block
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 32)  */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 33) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 34) struct dkblk0 {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 35) 	struct volumeid dk_vid;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 36) 	struct dkconfig dk_ios;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 37) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 38) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 39) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 40)  *	Slice Table Structure
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 41)  */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 42) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 43) struct slice {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 44) 	__be32	nblocks;		/* slice size (in blocks) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 45) 	__be32	blkoff;			/* block offset of slice */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 46) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 47) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 48) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 49) int sysv68_partition(struct parsed_partitions *state)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 50) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 51) 	int i, slices;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 52) 	int slot = 1;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 53) 	Sector sect;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 54) 	unsigned char *data;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 55) 	struct dkblk0 *b;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 56) 	struct slice *slice;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 57) 	char tmp[64];
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 58) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 59) 	data = read_part_sector(state, 0, &sect);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 60) 	if (!data)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 61) 		return -1;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 62) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 63) 	b = (struct dkblk0 *)data;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 64) 	if (memcmp(b->dk_vid.vid_mac, "MOTOROLA", sizeof(b->dk_vid.vid_mac))) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 65) 		put_dev_sector(sect);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 66) 		return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 67) 	}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 68) 	slices = be16_to_cpu(b->dk_ios.ios_slccnt);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 69) 	i = be32_to_cpu(b->dk_ios.ios_slcblk);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 70) 	put_dev_sector(sect);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 71) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 72) 	data = read_part_sector(state, i, &sect);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 73) 	if (!data)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 74) 		return -1;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 75) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 76) 	slices -= 1; /* last slice is the whole disk */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 77) 	snprintf(tmp, sizeof(tmp), "sysV68: %s(s%u)", state->name, slices);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 78) 	strlcat(state->pp_buf, tmp, PAGE_SIZE);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 79) 	slice = (struct slice *)data;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 80) 	for (i = 0; i < slices; i++, slice++) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 81) 		if (slot == state->limit)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 82) 			break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 83) 		if (be32_to_cpu(slice->nblocks)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 84) 			put_partition(state, slot,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 85) 				be32_to_cpu(slice->blkoff),
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 86) 				be32_to_cpu(slice->nblocks));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 87) 			snprintf(tmp, sizeof(tmp), "(s%u)", i);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 88) 			strlcat(state->pp_buf, tmp, PAGE_SIZE);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 89) 		}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 90) 		slot++;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 91) 	}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 92) 	strlcat(state->pp_buf, "\n", PAGE_SIZE);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 93) 	put_dev_sector(sect);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 94) 	return 1;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 95) }