0226e9ead4
The enum containing the *_PARTITION symbolic names is only relevant for the partition parser. More specifically most values are MSDOS partition table system indicators and thus should go straight into msdos.c. One value is only used by the sun partition parser, and the sun and sgi partition parsers use the same value as the x86 Linux RAID indicator to also indicate RAID autodetection. Duplicate them in sun.c and sgi.c given that the different partition types use entirely different values otherwise. Signed-off-by: Christoph Hellwig <hch@lst.de> Signed-off-by: Jens Axboe <axboe@kernel.dk>
89 lines
2.3 KiB
C
89 lines
2.3 KiB
C
// SPDX-License-Identifier: GPL-2.0
|
|
/*
|
|
* fs/partitions/sgi.c
|
|
*
|
|
* Code extracted from drivers/block/genhd.c
|
|
*/
|
|
|
|
#include "check.h"
|
|
|
|
#define SGI_LABEL_MAGIC 0x0be5a941
|
|
|
|
enum {
|
|
LINUX_RAID_PARTITION = 0xfd, /* autodetect RAID partition */
|
|
};
|
|
|
|
struct sgi_disklabel {
|
|
__be32 magic_mushroom; /* Big fat spliff... */
|
|
__be16 root_part_num; /* Root partition number */
|
|
__be16 swap_part_num; /* Swap partition number */
|
|
s8 boot_file[16]; /* Name of boot file for ARCS */
|
|
u8 _unused0[48]; /* Device parameter useless crapola.. */
|
|
struct sgi_volume {
|
|
s8 name[8]; /* Name of volume */
|
|
__be32 block_num; /* Logical block number */
|
|
__be32 num_bytes; /* How big, in bytes */
|
|
} volume[15];
|
|
struct sgi_partition {
|
|
__be32 num_blocks; /* Size in logical blocks */
|
|
__be32 first_block; /* First logical block */
|
|
__be32 type; /* Type of this partition */
|
|
} partitions[16];
|
|
__be32 csum; /* Disk label checksum */
|
|
__be32 _unused1; /* Padding */
|
|
};
|
|
|
|
int sgi_partition(struct parsed_partitions *state)
|
|
{
|
|
int i, csum;
|
|
__be32 magic;
|
|
int slot = 1;
|
|
unsigned int start, blocks;
|
|
__be32 *ui, cs;
|
|
Sector sect;
|
|
struct sgi_disklabel *label;
|
|
struct sgi_partition *p;
|
|
char b[BDEVNAME_SIZE];
|
|
|
|
label = read_part_sector(state, 0, §);
|
|
if (!label)
|
|
return -1;
|
|
p = &label->partitions[0];
|
|
magic = label->magic_mushroom;
|
|
if(be32_to_cpu(magic) != SGI_LABEL_MAGIC) {
|
|
/*printk("Dev %s SGI disklabel: bad magic %08x\n",
|
|
bdevname(bdev, b), be32_to_cpu(magic));*/
|
|
put_dev_sector(sect);
|
|
return 0;
|
|
}
|
|
ui = ((__be32 *) (label + 1)) - 1;
|
|
for(csum = 0; ui >= ((__be32 *) label);) {
|
|
cs = *ui--;
|
|
csum += be32_to_cpu(cs);
|
|
}
|
|
if(csum) {
|
|
printk(KERN_WARNING "Dev %s SGI disklabel: csum bad, label corrupted\n",
|
|
bdevname(state->bdev, b));
|
|
put_dev_sector(sect);
|
|
return 0;
|
|
}
|
|
/* All SGI disk labels have 16 partitions, disks under Linux only
|
|
* have 15 minor's. Luckily there are always a few zero length
|
|
* partitions which we don't care about so we never overflow the
|
|
* current_minor.
|
|
*/
|
|
for(i = 0; i < 16; i++, p++) {
|
|
blocks = be32_to_cpu(p->num_blocks);
|
|
start = be32_to_cpu(p->first_block);
|
|
if (blocks) {
|
|
put_partition(state, slot, start, blocks);
|
|
if (be32_to_cpu(p->type) == LINUX_RAID_PARTITION)
|
|
state->parts[slot].flags = ADDPART_FLAG_RAID;
|
|
}
|
|
slot++;
|
|
}
|
|
strlcat(state->pp_buf, "\n", PAGE_SIZE);
|
|
put_dev_sector(sect);
|
|
return 1;
|
|
}
|