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author | Al Viro <viro@zeniv.linux.org.uk> | 2011-09-16 00:25:05 -0400 |
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committer | Al Viro <viro@zeniv.linux.org.uk> | 2012-01-03 22:54:06 -0500 |
commit | 9be96f3fd10187f185d84cf878cf032465bcced3 (patch) | |
tree | 432a430ed9e0cbe0c18916cd3c3992f09b3feb37 /fs/partitions/acorn.c | |
parent | 4752bc309b7604d507c973c7b7678ac2ce10a058 (diff) | |
download | op-kernel-dev-9be96f3fd10187f185d84cf878cf032465bcced3.zip op-kernel-dev-9be96f3fd10187f185d84cf878cf032465bcced3.tar.gz |
move fs/partitions to block/
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
Diffstat (limited to 'fs/partitions/acorn.c')
-rw-r--r-- | fs/partitions/acorn.c | 556 |
1 files changed, 0 insertions, 556 deletions
diff --git a/fs/partitions/acorn.c b/fs/partitions/acorn.c deleted file mode 100644 index fbeb697..0000000 --- a/fs/partitions/acorn.c +++ /dev/null @@ -1,556 +0,0 @@ -/* - * linux/fs/partitions/acorn.c - * - * Copyright (c) 1996-2000 Russell King. - * - * This program is free software; you can redistribute it and/or modify - * it under the terms of the GNU General Public License version 2 as - * published by the Free Software Foundation. - * - * Scan ADFS partitions on hard disk drives. Unfortunately, there - * isn't a standard for partitioning drives on Acorn machines, so - * every single manufacturer of SCSI and IDE cards created their own - * method. - */ -#include <linux/buffer_head.h> -#include <linux/adfs_fs.h> - -#include "check.h" -#include "acorn.h" - -/* - * Partition types. (Oh for reusability) - */ -#define PARTITION_RISCIX_MFM 1 -#define PARTITION_RISCIX_SCSI 2 -#define PARTITION_LINUX 9 - -#if defined(CONFIG_ACORN_PARTITION_CUMANA) || \ - defined(CONFIG_ACORN_PARTITION_ADFS) -static struct adfs_discrecord * -adfs_partition(struct parsed_partitions *state, char *name, char *data, - unsigned long first_sector, int slot) -{ - struct adfs_discrecord *dr; - unsigned int nr_sects; - - if (adfs_checkbblk(data)) - return NULL; - - dr = (struct adfs_discrecord *)(data + 0x1c0); - - if (dr->disc_size == 0 && dr->disc_size_high == 0) - return NULL; - - nr_sects = (le32_to_cpu(dr->disc_size_high) << 23) | - (le32_to_cpu(dr->disc_size) >> 9); - - if (name) { - strlcat(state->pp_buf, " [", PAGE_SIZE); - strlcat(state->pp_buf, name, PAGE_SIZE); - strlcat(state->pp_buf, "]", PAGE_SIZE); - } - put_partition(state, slot, first_sector, nr_sects); - return dr; -} -#endif - -#ifdef CONFIG_ACORN_PARTITION_RISCIX - -struct riscix_part { - __le32 start; - __le32 length; - __le32 one; - char name[16]; -}; - -struct riscix_record { - __le32 magic; -#define RISCIX_MAGIC cpu_to_le32(0x4a657320) - __le32 date; - struct riscix_part part[8]; -}; - -#if defined(CONFIG_ACORN_PARTITION_CUMANA) || \ - defined(CONFIG_ACORN_PARTITION_ADFS) -static int riscix_partition(struct parsed_partitions *state, - unsigned long first_sect, int slot, - unsigned long nr_sects) -{ - Sector sect; - struct riscix_record *rr; - - rr = read_part_sector(state, first_sect, §); - if (!rr) - return -1; - - strlcat(state->pp_buf, " [RISCiX]", PAGE_SIZE); - - - if (rr->magic == RISCIX_MAGIC) { - unsigned long size = nr_sects > 2 ? 2 : nr_sects; - int part; - - strlcat(state->pp_buf, " <", PAGE_SIZE); - - put_partition(state, slot++, first_sect, size); - for (part = 0; part < 8; part++) { - if (rr->part[part].one && - memcmp(rr->part[part].name, "All\0", 4)) { - put_partition(state, slot++, - le32_to_cpu(rr->part[part].start), - le32_to_cpu(rr->part[part].length)); - strlcat(state->pp_buf, "(", PAGE_SIZE); - strlcat(state->pp_buf, rr->part[part].name, PAGE_SIZE); - strlcat(state->pp_buf, ")", PAGE_SIZE); - } - } - - strlcat(state->pp_buf, " >\n", PAGE_SIZE); - } else { - put_partition(state, slot++, first_sect, nr_sects); - } - - put_dev_sector(sect); - return slot; -} -#endif -#endif - -#define LINUX_NATIVE_MAGIC 0xdeafa1de -#define LINUX_SWAP_MAGIC 0xdeafab1e - -struct linux_part { - __le32 magic; - __le32 start_sect; - __le32 nr_sects; -}; - -#if defined(CONFIG_ACORN_PARTITION_CUMANA) || \ - defined(CONFIG_ACORN_PARTITION_ADFS) -static int linux_partition(struct parsed_partitions *state, - unsigned long first_sect, int slot, - unsigned long nr_sects) -{ - Sector sect; - struct linux_part *linuxp; - unsigned long size = nr_sects > 2 ? 2 : nr_sects; - - strlcat(state->pp_buf, " [Linux]", PAGE_SIZE); - - put_partition(state, slot++, first_sect, size); - - linuxp = read_part_sector(state, first_sect, §); - if (!linuxp) - return -1; - - strlcat(state->pp_buf, " <", PAGE_SIZE); - while (linuxp->magic == cpu_to_le32(LINUX_NATIVE_MAGIC) || - linuxp->magic == cpu_to_le32(LINUX_SWAP_MAGIC)) { - if (slot == state->limit) - break; - put_partition(state, slot++, first_sect + - le32_to_cpu(linuxp->start_sect), - le32_to_cpu(linuxp->nr_sects)); - linuxp ++; - } - strlcat(state->pp_buf, " >", PAGE_SIZE); - - put_dev_sector(sect); - return slot; -} -#endif - -#ifdef CONFIG_ACORN_PARTITION_CUMANA -int adfspart_check_CUMANA(struct parsed_partitions *state) -{ - unsigned long first_sector = 0; - unsigned int start_blk = 0; - Sector sect; - unsigned char *data; - char *name = "CUMANA/ADFS"; - int first = 1; - int slot = 1; - - /* - * Try Cumana style partitions - sector 6 contains ADFS boot block - * with pointer to next 'drive'. - * - * There are unknowns in this code - is the 'cylinder number' of the - * next partition relative to the start of this one - I'm assuming - * it is. - * - * Also, which ID did Cumana use? - * - * This is totally unfinished, and will require more work to get it - * going. Hence it is totally untested. - */ - do { - struct adfs_discrecord *dr; - unsigned int nr_sects; - - data = read_part_sector(state, start_blk * 2 + 6, §); - if (!data) - return -1; - - if (slot == state->limit) - break; - - dr = adfs_partition(state, name, data, first_sector, slot++); - if (!dr) - break; - - name = NULL; - - nr_sects = (data[0x1fd] + (data[0x1fe] << 8)) * - (dr->heads + (dr->lowsector & 0x40 ? 1 : 0)) * - dr->secspertrack; - - if (!nr_sects) - break; - - first = 0; - first_sector += nr_sects; - start_blk += nr_sects >> (BLOCK_SIZE_BITS - 9); - nr_sects = 0; /* hmm - should be partition size */ - - switch (data[0x1fc] & 15) { - case 0: /* No partition / ADFS? */ - break; - -#ifdef CONFIG_ACORN_PARTITION_RISCIX - case PARTITION_RISCIX_SCSI: - /* RISCiX - we don't know how to find the next one. */ - slot = riscix_partition(state, first_sector, slot, - nr_sects); - break; -#endif - - case PARTITION_LINUX: - slot = linux_partition(state, first_sector, slot, - nr_sects); - break; - } - put_dev_sector(sect); - if (slot == -1) - return -1; - } while (1); - put_dev_sector(sect); - return first ? 0 : 1; -} -#endif - -#ifdef CONFIG_ACORN_PARTITION_ADFS -/* - * Purpose: allocate ADFS partitions. - * - * Params : hd - pointer to gendisk structure to store partition info. - * dev - device number to access. - * - * Returns: -1 on error, 0 for no ADFS boot sector, 1 for ok. - * - * Alloc : hda = whole drive - * hda1 = ADFS partition on first drive. - * hda2 = non-ADFS partition. - */ -int adfspart_check_ADFS(struct parsed_partitions *state) -{ - unsigned long start_sect, nr_sects, sectscyl, heads; - Sector sect; - unsigned char *data; - struct adfs_discrecord *dr; - unsigned char id; - int slot = 1; - - data = read_part_sector(state, 6, §); - if (!data) - return -1; - - dr = adfs_partition(state, "ADFS", data, 0, slot++); - if (!dr) { - put_dev_sector(sect); - return 0; - } - - heads = dr->heads + ((dr->lowsector >> 6) & 1); - sectscyl = dr->secspertrack * heads; - start_sect = ((data[0x1fe] << 8) + data[0x1fd]) * sectscyl; - id = data[0x1fc] & 15; - put_dev_sector(sect); - - /* - * Work out start of non-adfs partition. - */ - nr_sects = (state->bdev->bd_inode->i_size >> 9) - start_sect; - - if (start_sect) { - switch (id) { -#ifdef CONFIG_ACORN_PARTITION_RISCIX - case PARTITION_RISCIX_SCSI: - case PARTITION_RISCIX_MFM: - slot = riscix_partition(state, start_sect, slot, - nr_sects); - break; -#endif - - case PARTITION_LINUX: - slot = linux_partition(state, start_sect, slot, - nr_sects); - break; - } - } - strlcat(state->pp_buf, "\n", PAGE_SIZE); - return 1; -} -#endif - -#ifdef CONFIG_ACORN_PARTITION_ICS - -struct ics_part { - __le32 start; - __le32 size; -}; - -static int adfspart_check_ICSLinux(struct parsed_partitions *state, - unsigned long block) -{ - Sector sect; - unsigned char *data = read_part_sector(state, block, §); - int result = 0; - - if (data) { - if (memcmp(data, "LinuxPart", 9) == 0) - result = 1; - put_dev_sector(sect); - } - - return result; -} - -/* - * Check for a valid ICS partition using the checksum. - */ -static inline int valid_ics_sector(const unsigned char *data) -{ - unsigned long sum; - int i; - - for (i = 0, sum = 0x50617274; i < 508; i++) - sum += data[i]; - - sum -= le32_to_cpu(*(__le32 *)(&data[508])); - - return sum == 0; -} - -/* - * Purpose: allocate ICS partitions. - * Params : hd - pointer to gendisk structure to store partition info. - * dev - device number to access. - * Returns: -1 on error, 0 for no ICS table, 1 for partitions ok. - * Alloc : hda = whole drive - * hda1 = ADFS partition 0 on first drive. - * hda2 = ADFS partition 1 on first drive. - * ..etc.. - */ -int adfspart_check_ICS(struct parsed_partitions *state) -{ - const unsigned char *data; - const struct ics_part *p; - int slot; - Sector sect; - - /* - * Try ICS style partitions - sector 0 contains partition info. - */ - data = read_part_sector(state, 0, §); - if (!data) - return -1; - - if (!valid_ics_sector(data)) { - put_dev_sector(sect); - return 0; - } - - strlcat(state->pp_buf, " [ICS]", PAGE_SIZE); - - for (slot = 1, p = (const struct ics_part *)data; p->size; p++) { - u32 start = le32_to_cpu(p->start); - s32 size = le32_to_cpu(p->size); /* yes, it's signed. */ - - if (slot == state->limit) - break; - - /* - * Negative sizes tell the RISC OS ICS driver to ignore - * this partition - in effect it says that this does not - * contain an ADFS filesystem. - */ - if (size < 0) { - size = -size; - - /* - * Our own extension - We use the first sector - * of the partition to identify what type this - * partition is. We must not make this visible - * to the filesystem. - */ - if (size > 1 && adfspart_check_ICSLinux(state, start)) { - start += 1; - size -= 1; - } - } - - if (size) - put_partition(state, slot++, start, size); - } - - put_dev_sector(sect); - strlcat(state->pp_buf, "\n", PAGE_SIZE); - return 1; -} -#endif - -#ifdef CONFIG_ACORN_PARTITION_POWERTEC -struct ptec_part { - __le32 unused1; - __le32 unused2; - __le32 start; - __le32 size; - __le32 unused5; - char type[8]; -}; - -static inline int valid_ptec_sector(const unsigned char *data) -{ - unsigned char checksum = 0x2a; - int i; - - /* - * If it looks like a PC/BIOS partition, then it - * probably isn't PowerTec. - */ - if (data[510] == 0x55 && data[511] == 0xaa) - return 0; - - for (i = 0; i < 511; i++) - checksum += data[i]; - - return checksum == data[511]; -} - -/* - * Purpose: allocate ICS partitions. - * Params : hd - pointer to gendisk structure to store partition info. - * dev - device number to access. - * Returns: -1 on error, 0 for no ICS table, 1 for partitions ok. - * Alloc : hda = whole drive - * hda1 = ADFS partition 0 on first drive. - * hda2 = ADFS partition 1 on first drive. - * ..etc.. - */ -int adfspart_check_POWERTEC(struct parsed_partitions *state) -{ - Sector sect; - const unsigned char *data; - const struct ptec_part *p; - int slot = 1; - int i; - - data = read_part_sector(state, 0, §); - if (!data) - return -1; - - if (!valid_ptec_sector(data)) { - put_dev_sector(sect); - return 0; - } - - strlcat(state->pp_buf, " [POWERTEC]", PAGE_SIZE); - - for (i = 0, p = (const struct ptec_part *)data; i < 12; i++, p++) { - u32 start = le32_to_cpu(p->start); - u32 size = le32_to_cpu(p->size); - - if (size) - put_partition(state, slot++, start, size); - } - - put_dev_sector(sect); - strlcat(state->pp_buf, "\n", PAGE_SIZE); - return 1; -} -#endif - -#ifdef CONFIG_ACORN_PARTITION_EESOX -struct eesox_part { - char magic[6]; - char name[10]; - __le32 start; - __le32 unused6; - __le32 unused7; - __le32 unused8; -}; - -/* - * Guess who created this format? - */ -static const char eesox_name[] = { - 'N', 'e', 'i', 'l', ' ', - 'C', 'r', 'i', 't', 'c', 'h', 'e', 'l', 'l', ' ', ' ' -}; - -/* - * EESOX SCSI partition format. - * - * This is a goddamned awful partition format. We don't seem to store - * the size of the partition in this table, only the start addresses. - * - * There are two possibilities where the size comes from: - * 1. The individual ADFS boot block entries that are placed on the disk. - * 2. The start address of the next entry. - */ -int adfspart_check_EESOX(struct parsed_partitions *state) -{ - Sector sect; - const unsigned char *data; - unsigned char buffer[256]; - struct eesox_part *p; - sector_t start = 0; - int i, slot = 1; - - data = read_part_sector(state, 7, §); - if (!data) - return -1; - - /* - * "Decrypt" the partition table. God knows why... - */ - for (i = 0; i < 256; i++) - buffer[i] = data[i] ^ eesox_name[i & 15]; - - put_dev_sector(sect); - - for (i = 0, p = (struct eesox_part *)buffer; i < 8; i++, p++) { - sector_t next; - - if (memcmp(p->magic, "Eesox", 6)) - break; - - next = le32_to_cpu(p->start); - if (i) - put_partition(state, slot++, start, next - start); - start = next; - } - - if (i != 0) { - sector_t size; - - size = get_capacity(state->bdev->bd_disk); - put_partition(state, slot++, start, size - start); - strlcat(state->pp_buf, "\n", PAGE_SIZE); - } - - return i ? 1 : 0; -} -#endif |