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Diffstat (limited to '')
-rw-r--r-- | libblkid/via_raid.c | 89 |
1 files changed, 89 insertions, 0 deletions
diff --git a/libblkid/via_raid.c b/libblkid/via_raid.c new file mode 100644 index 000000000..eba7e4bf2 --- /dev/null +++ b/libblkid/via_raid.c @@ -0,0 +1,89 @@ +/* + * Copyright (C) 2008 Karel Zak <kzak@redhat.com> + * + * 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 "superblocks.h" + +struct via_metadata { + uint16_t signature; + uint8_t version_number; + struct via_array { + uint16_t disk_bit_mask; + uint8_t disk_array_ex; + uint32_t capacity_low; + uint32_t capacity_high; + uint32_t serial_checksum; + } __attribute__((packed)) array; + uint32_t serial_checksum[8]; + uint8_t checksum; +} __attribute__((packed)); + +#define VIA_SIGNATURE 0xAA55 + +/* 8 bit checksum on first 50 bytes of metadata. */ +static uint8_t via_checksum(struct via_metadata *v) +{ + uint8_t i = 50, cs = 0; + + while (i--) + cs += ((uint8_t*) v)[i]; + + return cs == v->checksum; +} + +static int probe_viaraid(blkid_probe pr, + const struct blkid_idmag *mag __attribute__((__unused__))) +{ + uint64_t off; + struct via_metadata *v; + + if (pr->size < 0x10000) + return -1; + if (!S_ISREG(pr->mode) && !blkid_probe_is_wholedisk(pr)) + return -1; + + off = ((pr->size / 0x200)-1) * 0x200; + + v = (struct via_metadata *) + blkid_probe_get_buffer(pr, + off, + sizeof(struct via_metadata)); + if (!v) + return -1; + if (le16_to_cpu(v->signature) != VIA_SIGNATURE) + return -1; + if (v->version_number > 2) + return -1; + if (!via_checksum(v)) + return -1; + if (blkid_probe_sprintf_version(pr, "%u", v->version_number) != 0) + return -1; + if (blkid_probe_set_magic(pr, off, + sizeof(v->signature), + (unsigned char *) &v->signature)) + return -1; + return 0; +} + +const struct blkid_idinfo viaraid_idinfo = { + .name = "via_raid_member", + .usage = BLKID_USAGE_RAID, + .probefunc = probe_viaraid, + .magics = BLKID_NONE_MAGIC +}; + + |