#include "mdadm.h"
#include "xmalloc.h"
-/*
- * The version-1 superblock :
- * All numeric fields are little-endian.
- *
- * total size: 256 bytes plus 2 per device.
- * 1K allows 384 devices.
- */
-struct mdp_superblock_1 {
- /* constant array information - 128 bytes */
- __u32 magic; /* MD_SB_MAGIC: 0xa92b4efc - little endian */
- __u32 major_version; /* 1 */
- __u32 feature_map; /* 0 for now */
- __u32 pad0; /* always set to 0 when writing */
-
- __u8 set_uuid[16]; /* user-space generated. */
- char set_name[32]; /* set and interpreted by user-space */
-
- __u64 ctime; /* lo 40 bits are seconds, top 24 are microseconds or 0*/
- __u32 level; /* -4 (multipath), -1 (linear), 0,1,4,5 */
- __u32 layout; /* used for raid5, raid6, raid10, and raid0 */
- __u64 size; /* used size of component devices, in 512byte sectors */
-
- __u32 chunksize; /* in 512byte sectors */
- __u32 raid_disks;
- union {
- __u32 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.
- */
-
- /* only meaningful when feature_map[MD_FEATURE_PPL] is set */
- struct {
- __s16 offset; /* sectors from start of superblock that ppl starts */
- __u16 size; /* ppl size in sectors */
- } ppl;
- };
-
- /* These are only valid with feature bit '4' */
- __u32 new_level; /* new level we are reshaping to */
- __u64 reshape_position; /* next address in array-space for reshape */
- __u32 delta_disks; /* change in number of raid_disks */
- __u32 new_layout; /* new layout */
- __u32 new_chunk; /* new chunk size (sectors) */
- __u32 new_offset; /* signed number to add to data_offset in new
- * layout. 0 == no-change. This can be
- * different on each device in the array.
- */
-
- /* constant this-device information - 64 bytes */
- __u64 data_offset; /* sector start of data, often 0 */
- __u64 data_size; /* sectors in this device that can be used for data */
- __u64 super_offset; /* sector start of this superblock */
- union {
- __u64 recovery_offset;/* sectors before this offset (from data_offset) have been recovered */
- __u64 journal_tail;/* journal tail of journal device (from data_offset) */
- };
- __u32 dev_number; /* permanent identifier of this device - not role in raid */
- __u32 cnt_corrected_read; /* number of read errors that were corrected by re-writing */
- __u8 device_uuid[16]; /* user-space setable, ignored by kernel */
- __u8 devflags; /* per-device flags. Only one defined...*/
-#define WriteMostly1 1 /* mask for writemostly flag in above */
-#define FailFast1 2 /* Device should get FailFast requests */
- /* bad block log. If there are any bad blocks the feature flag is set.
- * if offset and size are non-zero, that space is reserved and available.
- */
- __u8 bblog_shift; /* shift from sectors to block size for badblock list */
- __u16 bblog_size; /* number of sectors reserved for badblock list */
- __u32 bblog_offset; /* sector offset from superblock to bblog, signed */
-
- /* array state information - 64 bytes */
- __u64 utime; /* 40 bits second, 24 bits microseconds */
- __u64 events; /* incremented when superblock updated */
- __u64 resync_offset; /* data before this offset (from data_offset) known to be in sync */
- __u32 sb_csum; /* checksum upto dev_roles[max_dev] */
- __u32 max_dev; /* size of dev_roles[] array to consider */
- __u8 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.
- */
- __u16 dev_roles[0]; /* role in array, or 0xffff for a spare, or 0xfffe for faulty */
-};
-
#define MAX_SB_SIZE 4096
/* bitmap super size is 256, but we round up to a sector for alignment */
#define BM_SUPER_SIZE 512
#define MULTIPLE_PPL_AREA_SIZE_SUPER1 (1024 * 1024) /* Size of the whole
* mutliple PPL area
*/
-/* feature_map bits */
-#define MD_FEATURE_BITMAP_OFFSET 1
-#define MD_FEATURE_RECOVERY_OFFSET 2 /* recovery_offset is present and
- * must be honoured
- */
-#define MD_FEATURE_RESHAPE_ACTIVE 4
-#define MD_FEATURE_BAD_BLOCKS 8 /* badblock list is not empty */
-#define MD_FEATURE_REPLACEMENT 16 /* This device is replacing an
- * active device with same 'role'.
- * 'recovery_offset' is also set.
- */
-#define MD_FEATURE_RESHAPE_BACKWARDS 32 /* Reshape doesn't change number
- * of devices, but is going
- * backwards anyway.
- */
-#define MD_FEATURE_NEW_OFFSET 64 /* new_offset must be honoured */
-#define MD_FEATURE_BITMAP_VERSIONED 256 /* bitmap version number checked properly */
-#define MD_FEATURE_JOURNAL 512 /* support write journal */
-#define MD_FEATURE_PPL 1024 /* support PPL */
-#define MD_FEATURE_MUTLIPLE_PPLS 2048 /* support for multiple PPLs */
-#define MD_FEATURE_RAID0_LAYOUT 4096 /* layout is meaningful in RAID0 */
-#define MD_FEATURE_ALL (MD_FEATURE_BITMAP_OFFSET \
- |MD_FEATURE_RECOVERY_OFFSET \
- |MD_FEATURE_RESHAPE_ACTIVE \
- |MD_FEATURE_BAD_BLOCKS \
- |MD_FEATURE_REPLACEMENT \
- |MD_FEATURE_RESHAPE_BACKWARDS \
- |MD_FEATURE_NEW_OFFSET \
- |MD_FEATURE_BITMAP_VERSIONED \
- |MD_FEATURE_JOURNAL \
- |MD_FEATURE_PPL \
- |MD_FEATURE_MULTIPLE_PPLS \
- |MD_FEATURE_RAID0_LAYOUT \
- )
static int role_from_sb(struct mdp_superblock_1 *sb)
{
static inline unsigned int md_feature_any_ppl_on(__u32 feature_map)
{
return ((__cpu_to_le32(feature_map) &
- (MD_FEATURE_PPL | MD_FEATURE_MUTLIPLE_PPLS)));
+ (MD_FEATURE_PPL | MD_FEATURE_MULTIPLE_PPLS)));
}
static inline unsigned int choose_ppl_space(int chunk)
}
case UOPT_NO_PPL:
sb->feature_map &= ~__cpu_to_le32(MD_FEATURE_PPL |
- MD_FEATURE_MUTLIPLE_PPLS);
+ MD_FEATURE_MULTIPLE_PPLS);
break;
case UOPT_DEVICESIZE:
if (__le64_to_cpu(sb->super_offset) >=
bms->nodes = __cpu_to_le32(st->nodes);
if (st->nodes)
sb->feature_map = __cpu_to_le32(__le32_to_cpu(sb->feature_map) |
- MD_FEATURE_BITMAP_VERSIONED);
+ MD_FEATURE_CLUSTERED);
if (st->cluster_name) {
len = sizeof(bms->cluster_name);
strncpy((char *)bms->cluster_name, st->cluster_name, len);
projects / thirdparty / mdadm.git / commitdiff
