diff options
Diffstat (limited to 'libblkid/linux_raid.c')
| -rw-r--r-- | libblkid/linux_raid.c | 258 |
1 files changed, 0 insertions, 258 deletions
diff --git a/libblkid/linux_raid.c b/libblkid/linux_raid.c deleted file mode 100644 index a3f9d67d5..000000000 --- a/libblkid/linux_raid.c +++ /dev/null @@ -1,258 +0,0 @@ -/* - * 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 <stdint.h> - -#include "superblocks.h" - -struct mdp0_super_block { - uint32_t md_magic; - uint32_t major_version; - uint32_t minor_version; - uint32_t patch_version; - uint32_t gvalid_words; - uint32_t set_uuid0; - uint32_t ctime; - uint32_t level; - uint32_t size; - uint32_t nr_disks; - uint32_t raid_disks; - uint32_t md_minor; - uint32_t not_persistent; - uint32_t set_uuid1; - uint32_t set_uuid2; - uint32_t set_uuid3; -}; - -/* - * Version-1, little-endian. - */ -struct mdp1_super_block { - /* constant array information - 128 bytes */ - uint32_t magic; /* MD_SB_MAGIC: 0xa92b4efc - little endian */ - uint32_t major_version; /* 1 */ - uint32_t feature_map; /* 0 for now */ - uint32_t pad0; /* always set to 0 when writing */ - - uint8_t set_uuid[16]; /* user-space generated. */ - unsigned char set_name[32]; /* set and interpreted by user-space */ - - uint64_t ctime; /* lo 40 bits are seconds, top 24 are microseconds or 0*/ - uint32_t level; /* -4 (multipath), -1 (linear), 0,1,4,5 */ - uint32_t layout; /* only for raid5 currently */ - uint64_t size; /* used size of component devices, in 512byte sectors */ - - uint32_t chunksize; /* in 512byte sectors */ - uint32_t raid_disks; - uint32_t bitmap_offset; /* sectors after start of superblock that bitmap starts - * NOTE: signed, so bitmap can be before superblock - * only meaningful of feature_map[0] is set. - */ - - /* These are only valid with feature bit '4' */ - uint32_t new_level; /* new level we are reshaping to */ - uint64_t reshape_position; /* next address in array-space for reshape */ - uint32_t delta_disks; /* change in number of raid_disks */ - uint32_t new_layout; /* new layout */ - uint32_t new_chunk; /* new chunk size (bytes) */ - uint8_t pad1[128-124]; /* set to 0 when written */ - - /* constant this-device information - 64 bytes */ - uint64_t data_offset; /* sector start of data, often 0 */ - uint64_t data_size; /* sectors in this device that can be used for data */ - uint64_t super_offset; /* sector start of this superblock */ - uint64_t recovery_offset;/* sectors before this offset (from data_offset) have been recovered */ - uint32_t dev_number; /* permanent identifier of this device - not role in raid */ - uint32_t cnt_corrected_read; /* number of read errors that were corrected by re-writing */ - uint8_t device_uuid[16]; /* user-space setable, ignored by kernel */ - uint8_t devflags; /* per-device flags. Only one defined...*/ - uint8_t pad2[64-57]; /* set to 0 when writing */ - - /* array state information - 64 bytes */ - uint64_t utime; /* 40 bits second, 24 btes microseconds */ - uint64_t events; /* incremented when superblock updated */ - uint64_t resync_offset; /* data before this offset (from data_offset) known to be in sync */ - uint32_t sb_csum; /* checksum up to dev_roles[max_dev] */ - uint32_t max_dev; /* size of dev_roles[] array to consider */ - uint8_t pad3[64-32]; /* set to 0 when writing */ - - /* device state information. Indexed by dev_number. - * 2 bytes per device - * Note there are no per-device state flags. State information is rolled - * into the 'roles' value. If a device is spare or faulty, then it doesn't - * have a meaningful role. - */ - uint16_t dev_roles[0]; /* role in array, or 0xffff for a spare, or 0xfffe for faulty */ -}; - - -#define MD_RESERVED_BYTES 0x10000 -#define MD_SB_MAGIC 0xa92b4efc - -static int probe_raid0(blkid_probe pr, blkid_loff_t off) -{ - struct mdp0_super_block *mdp0; - union { - uint32_t ints[4]; - uint8_t bytes[16]; - } uuid; - uint32_t ma, mi, pa; - uint64_t size; - - if (pr->size < MD_RESERVED_BYTES) - return -1; - mdp0 = (struct mdp0_super_block *) - blkid_probe_get_buffer(pr, - off, - sizeof(struct mdp0_super_block)); - if (!mdp0) - return -1; - - memset(uuid.ints, 0, sizeof(uuid.ints)); - - if (le32_to_cpu(mdp0->md_magic) == MD_SB_MAGIC) { - uuid.ints[0] = swab32(mdp0->set_uuid0); - if (le32_to_cpu(mdp0->minor_version) >= 90) { - uuid.ints[1] = swab32(mdp0->set_uuid1); - uuid.ints[2] = swab32(mdp0->set_uuid2); - uuid.ints[3] = swab32(mdp0->set_uuid3); - } - ma = le32_to_cpu(mdp0->major_version); - mi = le32_to_cpu(mdp0->minor_version); - pa = le32_to_cpu(mdp0->patch_version); - size = le32_to_cpu(mdp0->size); - - } else if (be32_to_cpu(mdp0->md_magic) == MD_SB_MAGIC) { - uuid.ints[0] = mdp0->set_uuid0; - if (be32_to_cpu(mdp0->minor_version) >= 90) { - uuid.ints[1] = mdp0->set_uuid1; - uuid.ints[2] = mdp0->set_uuid2; - uuid.ints[3] = mdp0->set_uuid3; - } - ma = be32_to_cpu(mdp0->major_version); - mi = be32_to_cpu(mdp0->minor_version); - pa = be32_to_cpu(mdp0->patch_version); - size = be32_to_cpu(mdp0->size); - } else - return 1; - - size <<= 10; /* convert KiB to bytes */ - - if (pr->size < 0 || (uint64_t) pr->size < size + MD_RESERVED_BYTES) - /* device is too small */ - return 1; - - if (off < 0 || (uint64_t) off < size) - /* no space before superblock */ - return 1; - - /* - * Check for collisions between RAID and partition table - * - * For example the superblock is at the end of the last partition, it's - * the same position as at the end of the disk... - */ - if ((S_ISREG(pr->mode) || blkid_probe_is_wholedisk(pr)) && - blkid_probe_is_covered_by_pt(pr, - off - size, /* min. start */ - size + MD_RESERVED_BYTES)) { /* min. length */ - - /* ignore this superblock, it's within any partition and - * we are working with whole-disk now */ - return 1; - } - - if (blkid_probe_sprintf_version(pr, "%u.%u.%u", ma, mi, pa) != 0) - return -1; - if (blkid_probe_set_uuid(pr, (unsigned char *) uuid.bytes) != 0) - return -1; - if (blkid_probe_set_magic(pr, off, sizeof(mdp0->md_magic), - (unsigned char *) &mdp0->md_magic)) - return -1; - return 0; -} - -static int probe_raid1(blkid_probe pr, off_t off) -{ - struct mdp1_super_block *mdp1; - - mdp1 = (struct mdp1_super_block *) - blkid_probe_get_buffer(pr, - off, - sizeof(struct mdp1_super_block)); - if (!mdp1) - return -1; - if (le32_to_cpu(mdp1->magic) != MD_SB_MAGIC) - return -1; - if (le32_to_cpu(mdp1->major_version) != 1U) - return -1; - if (le64_to_cpu(mdp1->super_offset) != (uint64_t) off >> 9) - return -1; - if (blkid_probe_set_uuid(pr, (unsigned char *) mdp1->set_uuid) != 0) - return -1; - if (blkid_probe_set_uuid_as(pr, - (unsigned char *) mdp1->device_uuid, "UUID_SUB") != 0) - return -1; - if (blkid_probe_set_label(pr, mdp1->set_name, - sizeof(mdp1->set_name)) != 0) - return -1; - if (blkid_probe_set_magic(pr, off, sizeof(mdp1->magic), - (unsigned char *) &mdp1->magic)) - return -1; - return 0; -} - -int probe_raid(blkid_probe pr, - const struct blkid_idmag *mag __attribute__((__unused__))) -{ - const char *ver = NULL; - - if (pr->size > MD_RESERVED_BYTES) { - /* version 0 at the end of the device */ - uint64_t sboff = (pr->size & ~(MD_RESERVED_BYTES - 1)) - - MD_RESERVED_BYTES; - if (probe_raid0(pr, sboff) == 0) - return 0; - - /* version 1.0 at the end of the device */ - sboff = (pr->size & ~(0x1000 - 1)) - 0x2000; - if (probe_raid1(pr, sboff) == 0) - ver = "1.0"; - } - - if (!ver) { - /* version 1.1 at the start of the device */ - if (probe_raid1(pr, 0) == 0) - ver = "1.1"; - - /* version 1.2 at 4k offset from the start */ - else if (probe_raid1(pr, 0x1000) == 0) - ver = "1.2"; - } - - if (ver) { - blkid_probe_set_version(pr, ver); - return 0; - } - return -1; -} - - -const struct blkid_idinfo linuxraid_idinfo = { - .name = "linux_raid_member", - .usage = BLKID_USAGE_RAID, - .probefunc = probe_raid, - .magics = BLKID_NONE_MAGIC -}; - - |