1/* 2 * volume_id - reads filesystem label and uuid 3 * 4 * Copyright (C) 2005 Kay Sievers <kay.sievers@vrfy.org> 5 * 6 * This program is free software; you can redistribute it and/or modify it 7 * under the terms of the GNU General Public License as published by the 8 * Free Software Foundation version 2 of the License. 9 */ 10 11#ifndef _GNU_SOURCE 12#define _GNU_SOURCE 1 13#endif 14 15#ifdef HAVE_CONFIG_H 16# include <config.h> 17#endif 18 19#include <stdio.h> 20#include <stdlib.h> 21#include <unistd.h> 22#include <string.h> 23#include <errno.h> 24#include <ctype.h> 25 26#include "libvolume_id.h" 27#include "util.h" 28 29struct promise_meta { 30 uint8_t sig[24]; 31} PACKED; 32 33#define PDC_CONFIG_OFF 0x1200 34#define PDC_SIGNATURE "Promise Technology, Inc." 35 36int volume_id_probe_promise_fasttrack_raid(struct volume_id *id, uint64_t off, uint64_t size) 37{ 38 const uint8_t *buf; 39 struct promise_meta *pdc; 40 unsigned int i; 41 static unsigned int sectors[] = { 42 63, 255, 256, 16, 399, 0 43 }; 44 45 info("probing at offset 0x%llx, size 0x%llx", 46 (unsigned long long) off, (unsigned long long) size); 47 48 if (size < 0x40000) 49 return -1; 50 51 for (i = 0; sectors[i] != 0; i++) { 52 uint64_t meta_off; 53 54 meta_off = ((size / 0x200) - sectors[i]) * 0x200; 55 buf = volume_id_get_buffer(id, off + meta_off, 0x200); 56 if (buf == NULL) 57 return -1; 58 59 pdc = (struct promise_meta *) buf; 60 if (memcmp(pdc->sig, PDC_SIGNATURE, sizeof(PDC_SIGNATURE)-1) == 0) 61 goto found; 62 } 63 return -1; 64 65found: 66 volume_id_set_usage(id, VOLUME_ID_RAID); 67 id->type = "promise_fasttrack_raid_member"; 68 69 return 0; 70} 71