1b2441318SGreg Kroah-Hartman // SPDX-License-Identifier: GPL-2.0
29be96f3fSAl Viro /*
39be96f3fSAl Viro * fs/partitions/mac.c
49be96f3fSAl Viro *
59be96f3fSAl Viro * Code extracted from drivers/block/genhd.c
69be96f3fSAl Viro * Copyright (C) 1991-1998 Linus Torvalds
79be96f3fSAl Viro * Re-organised Feb 1998 Russell King
89be96f3fSAl Viro */
99be96f3fSAl Viro
109be96f3fSAl Viro #include <linux/ctype.h>
119be96f3fSAl Viro #include "check.h"
129be96f3fSAl Viro #include "mac.h"
139be96f3fSAl Viro
149be96f3fSAl Viro #ifdef CONFIG_PPC_PMAC
159be96f3fSAl Viro #include <asm/machdep.h>
169be96f3fSAl Viro extern void note_bootable_part(dev_t dev, int part, int goodness);
179be96f3fSAl Viro #endif
189be96f3fSAl Viro
199be96f3fSAl Viro /*
209be96f3fSAl Viro * Code to understand MacOS partition tables.
219be96f3fSAl Viro */
229be96f3fSAl Viro
mac_fix_string(char * stg,int len)239be96f3fSAl Viro static inline void mac_fix_string(char *stg, int len)
249be96f3fSAl Viro {
259be96f3fSAl Viro int i;
269be96f3fSAl Viro
279be96f3fSAl Viro for (i = len - 1; i >= 0 && stg[i] == ' '; i--)
289be96f3fSAl Viro stg[i] = 0;
299be96f3fSAl Viro }
309be96f3fSAl Viro
mac_partition(struct parsed_partitions * state)319be96f3fSAl Viro int mac_partition(struct parsed_partitions *state)
329be96f3fSAl Viro {
339be96f3fSAl Viro Sector sect;
349be96f3fSAl Viro unsigned char *data;
359be96f3fSAl Viro int slot, blocks_in_map;
3602e2a5bfSKees Cook unsigned secsize, datasize, partoffset;
379be96f3fSAl Viro #ifdef CONFIG_PPC_PMAC
389be96f3fSAl Viro int found_root = 0;
399be96f3fSAl Viro int found_root_goodness = 0;
409be96f3fSAl Viro #endif
419be96f3fSAl Viro struct mac_partition *part;
429be96f3fSAl Viro struct mac_driver_desc *md;
439be96f3fSAl Viro
449be96f3fSAl Viro /* Get 0th block and look at the first partition map entry. */
459be96f3fSAl Viro md = read_part_sector(state, 0, §);
469be96f3fSAl Viro if (!md)
479be96f3fSAl Viro return -1;
489be96f3fSAl Viro if (be16_to_cpu(md->signature) != MAC_DRIVER_MAGIC) {
499be96f3fSAl Viro put_dev_sector(sect);
509be96f3fSAl Viro return 0;
519be96f3fSAl Viro }
529be96f3fSAl Viro secsize = be16_to_cpu(md->block_size);
539be96f3fSAl Viro put_dev_sector(sect);
5402e2a5bfSKees Cook datasize = round_down(secsize, 512);
5502e2a5bfSKees Cook data = read_part_sector(state, datasize / 512, §);
569be96f3fSAl Viro if (!data)
579be96f3fSAl Viro return -1;
5802e2a5bfSKees Cook partoffset = secsize % 512;
5902e2a5bfSKees Cook if (partoffset + sizeof(*part) > datasize)
6002e2a5bfSKees Cook return -1;
6102e2a5bfSKees Cook part = (struct mac_partition *) (data + partoffset);
629be96f3fSAl Viro if (be16_to_cpu(part->signature) != MAC_PARTITION_MAGIC) {
639be96f3fSAl Viro put_dev_sector(sect);
649be96f3fSAl Viro return 0; /* not a MacOS disk */
659be96f3fSAl Viro }
669be96f3fSAl Viro blocks_in_map = be32_to_cpu(part->map_count);
679be96f3fSAl Viro if (blocks_in_map < 0 || blocks_in_map >= DISK_MAX_PARTS) {
689be96f3fSAl Viro put_dev_sector(sect);
699be96f3fSAl Viro return 0;
709be96f3fSAl Viro }
7106004e6eSMing Lei
7206004e6eSMing Lei if (blocks_in_map >= state->limit)
7306004e6eSMing Lei blocks_in_map = state->limit - 1;
7406004e6eSMing Lei
759be96f3fSAl Viro strlcat(state->pp_buf, " [mac]", PAGE_SIZE);
769be96f3fSAl Viro for (slot = 1; slot <= blocks_in_map; ++slot) {
779be96f3fSAl Viro int pos = slot * secsize;
789be96f3fSAl Viro put_dev_sector(sect);
799be96f3fSAl Viro data = read_part_sector(state, pos/512, §);
809be96f3fSAl Viro if (!data)
819be96f3fSAl Viro return -1;
829be96f3fSAl Viro part = (struct mac_partition *) (data + pos%512);
839be96f3fSAl Viro if (be16_to_cpu(part->signature) != MAC_PARTITION_MAGIC)
849be96f3fSAl Viro break;
859be96f3fSAl Viro put_partition(state, slot,
869be96f3fSAl Viro be32_to_cpu(part->start_block) * (secsize/512),
879be96f3fSAl Viro be32_to_cpu(part->block_count) * (secsize/512));
889be96f3fSAl Viro
8958294050SRasmus Villemoes if (!strncasecmp(part->type, "Linux_RAID", 10))
909be96f3fSAl Viro state->parts[slot].flags = ADDPART_FLAG_RAID;
919be96f3fSAl Viro #ifdef CONFIG_PPC_PMAC
929be96f3fSAl Viro /*
939be96f3fSAl Viro * If this is the first bootable partition, tell the
949be96f3fSAl Viro * setup code, in case it wants to make this the root.
959be96f3fSAl Viro */
969be96f3fSAl Viro if (machine_is(powermac)) {
979be96f3fSAl Viro int goodness = 0;
989be96f3fSAl Viro
999be96f3fSAl Viro mac_fix_string(part->processor, 16);
1009be96f3fSAl Viro mac_fix_string(part->name, 32);
1019be96f3fSAl Viro mac_fix_string(part->type, 32);
1029be96f3fSAl Viro
1039be96f3fSAl Viro if ((be32_to_cpu(part->status) & MAC_STATUS_BOOTABLE)
1049be96f3fSAl Viro && strcasecmp(part->processor, "powerpc") == 0)
1059be96f3fSAl Viro goodness++;
1069be96f3fSAl Viro
1079be96f3fSAl Viro if (strcasecmp(part->type, "Apple_UNIX_SVR2") == 0
10858294050SRasmus Villemoes || (strncasecmp(part->type, "Linux", 5) == 0
1099be96f3fSAl Viro && strcasecmp(part->type, "Linux_swap") != 0)) {
1109be96f3fSAl Viro int i, l;
1119be96f3fSAl Viro
1129be96f3fSAl Viro goodness++;
1139be96f3fSAl Viro l = strlen(part->name);
1149be96f3fSAl Viro if (strcmp(part->name, "/") == 0)
1159be96f3fSAl Viro goodness++;
1169be96f3fSAl Viro for (i = 0; i <= l - 4; ++i) {
11758294050SRasmus Villemoes if (strncasecmp(part->name + i, "root",
1189be96f3fSAl Viro 4) == 0) {
1199be96f3fSAl Viro goodness += 2;
1209be96f3fSAl Viro break;
1219be96f3fSAl Viro }
1229be96f3fSAl Viro }
12358294050SRasmus Villemoes if (strncasecmp(part->name, "swap", 4) == 0)
1249be96f3fSAl Viro goodness--;
1259be96f3fSAl Viro }
1269be96f3fSAl Viro
1279be96f3fSAl Viro if (goodness > found_root_goodness) {
1289be96f3fSAl Viro found_root = slot;
1299be96f3fSAl Viro found_root_goodness = goodness;
1309be96f3fSAl Viro }
1319be96f3fSAl Viro }
1329be96f3fSAl Viro #endif /* CONFIG_PPC_PMAC */
1339be96f3fSAl Viro }
1349be96f3fSAl Viro #ifdef CONFIG_PPC_PMAC
1359be96f3fSAl Viro if (found_root_goodness)
136*a08aa9bcSChristoph Hellwig note_bootable_part(state->disk->part0->bd_dev, found_root,
1379be96f3fSAl Viro found_root_goodness);
1389be96f3fSAl Viro #endif
1399be96f3fSAl Viro
1409be96f3fSAl Viro put_dev_sector(sect);
1419be96f3fSAl Viro strlcat(state->pp_buf, "\n", PAGE_SIZE);
1429be96f3fSAl Viro return 1;
1439be96f3fSAl Viro }
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