diff options
Diffstat (limited to 'libblkid/silicon_raid.c')
| -rw-r--r-- | libblkid/silicon_raid.c | 130 |
1 files changed, 130 insertions, 0 deletions
diff --git a/libblkid/silicon_raid.c b/libblkid/silicon_raid.c new file mode 100644 index 000000000..496a3e7b0 --- /dev/null +++ b/libblkid/silicon_raid.c @@ -0,0 +1,130 @@ +/* + * Copyright (C) 2008 Karel Zak <kzak@redhat.com> + * Copyright (C) 2005 Kay Sievers <kay.sievers@vrfy.org> + * + * Inspired by libvolume_id by + * Kay Sievers <kay.sievers@vrfy.org> + * + * This file may be redistributed under the terms of the + * GNU Lesser General Public License. + */ +#include <stdio.h> +#include <stdlib.h> +#include <unistd.h> +#include <string.h> +#include <errno.h> +#include <ctype.h> +#include <stdint.h> +#include <stddef.h> + +#include "superblocks.h" + +struct silicon_metadata { + uint8_t unknown0[0x2E]; + uint8_t ascii_version[0x36 - 0x2E]; + int8_t diskname[0x56 - 0x36]; + int8_t unknown1[0x60 - 0x56]; + uint32_t magic; + int8_t unknown1a[0x6C - 0x64]; + uint32_t array_sectors_low; + uint32_t array_sectors_high; + int8_t unknown2[0x78 - 0x74]; + uint32_t thisdisk_sectors; + int8_t unknown3[0x100 - 0x7C]; + int8_t unknown4[0x104 - 0x100]; + uint16_t product_id; + uint16_t vendor_id; + uint16_t minor_ver; + uint16_t major_ver; + uint8_t seconds; + uint8_t minutes; + uint8_t hour; + uint8_t day; + uint8_t month; + uint8_t year; + uint16_t raid0_stride; + int8_t unknown6[0x116 - 0x114]; + uint8_t disk_number; + uint8_t type; /* SILICON_TYPE_* */ + int8_t drives_per_striped_set; + int8_t striped_set_number; + int8_t drives_per_mirrored_set; + int8_t mirrored_set_number; + uint32_t rebuild_ptr_low; + uint32_t rebuild_ptr_high; + uint32_t incarnation_no; + uint8_t member_status; + uint8_t mirrored_set_state; /* SILICON_MIRROR_* */ + uint8_t reported_device_location; + uint8_t idechannel; + uint8_t auto_rebuild; + uint8_t unknown8; + uint8_t text_type[0x13E - 0x12E]; + uint16_t checksum1; + int8_t assumed_zeros[0x1FE - 0x140]; + uint16_t checksum2; +} __attribute__((packed)); + +#define SILICON_MAGIC 0x2F000000 + +static int checksum(struct silicon_metadata *sil) +{ + int sum = 0; + unsigned short count = offsetof(struct silicon_metadata, checksum1) / 2; + uint16_t *p = (uint16_t *) sil; + + while (count--) + sum += *p++; + + return (-sum & 0xFFFF) == le16_to_cpu(sil->checksum1); +} + +static int probe_silraid(blkid_probe pr, + const struct blkid_idmag *mag __attribute__((__unused__))) +{ + uint64_t off; + struct silicon_metadata *sil; + + if (pr->size < 0x10000) + return -1; + if (!S_ISREG(pr->mode) && !blkid_probe_is_wholedisk(pr)) + return -1; + + off = ((pr->size / 0x200) - 1) * 0x200; + + sil = (struct silicon_metadata *) + blkid_probe_get_buffer(pr, off, + sizeof(struct silicon_metadata)); + if (!sil) + return -1; + + if (le32_to_cpu(sil->magic) != SILICON_MAGIC) + return -1; + if (sil->disk_number >= 8) + return -1; + if (!checksum(sil)) { + DBG(DEBUG_LOWPROBE, printf("silicon raid: incorrect checksum\n")); + return -1; + } + + if (blkid_probe_sprintf_version(pr, "%u.%u", + le16_to_cpu(sil->major_ver), + le16_to_cpu(sil->minor_ver)) != 0) + return -1; + + if (blkid_probe_set_magic(pr, + off + offsetof(struct silicon_metadata, magic), + sizeof(sil->magic), + (unsigned char *) &sil->magic)) + return -1; + return 0; +} + +const struct blkid_idinfo silraid_idinfo = { + .name = "silicon_medley_raid_member", + .usage = BLKID_USAGE_RAID, + .probefunc = probe_silraid, + .magics = BLKID_NONE_MAGIC +}; + + |