/*
* mdadm - Intel(R) Matrix Storage Manager Support
*
- * Copyright (C) 2002-2007 Intel Corporation
+ * Copyright (C) 2002-2008 Intel Corporation
*
* This program is free software; you can redistribute it and/or modify it
* under the terms and conditions of the GNU General Public License,
* 51 Franklin St - Fifth Floor, Boston, MA 02110-1301 USA.
*/
+#define HAVE_STDINT_H 1
#include "mdadm.h"
#include "mdmon.h"
+#include "sha1.h"
+#include "platform-intel.h"
#include <values.h>
#include <scsi/sg.h>
#include <ctype.h>
+#include <dirent.h>
/* MPB == Metadata Parameter Block */
#define MPB_SIGNATURE "Intel Raid ISM Cfg Sig. "
#define MPB_SIG_LEN (strlen(MPB_SIGNATURE))
#define MPB_VERSION_RAID0 "1.0.00"
#define MPB_VERSION_RAID1 "1.1.00"
+#define MPB_VERSION_MANY_VOLUMES_PER_ARRAY "1.2.00"
+#define MPB_VERSION_3OR4_DISK_ARRAY "1.2.01"
#define MPB_VERSION_RAID5 "1.2.02"
+#define MPB_VERSION_5OR6_DISK_ARRAY "1.2.04"
+#define MPB_VERSION_CNG "1.2.06"
+#define MPB_VERSION_ATTRIBS "1.3.00"
#define MAX_SIGNATURE_LENGTH 32
#define MAX_RAID_SERIAL_LEN 16
+
+#define MPB_ATTRIB_CHECKSUM_VERIFY __cpu_to_le32(0x80000000)
+#define MPB_ATTRIB_PM __cpu_to_le32(0x40000000)
+#define MPB_ATTRIB_2TB __cpu_to_le32(0x20000000)
+#define MPB_ATTRIB_RAID0 __cpu_to_le32(0x00000001)
+#define MPB_ATTRIB_RAID1 __cpu_to_le32(0x00000002)
+#define MPB_ATTRIB_RAID10 __cpu_to_le32(0x00000004)
+#define MPB_ATTRIB_RAID1E __cpu_to_le32(0x00000008)
+#define MPB_ATTRIB_RAID5 __cpu_to_le32(0x00000010)
+#define MPB_ATTRIB_RAIDCNG __cpu_to_le32(0x00000020)
+
#define MPB_SECTOR_CNT 418
#define IMSM_RESERVED_SECTORS 4096
+#define SECT_PER_MB_SHIFT 11
/* Disk configuration info. */
#define IMSM_MAX_DEVICES 255
__u8 serial[MAX_RAID_SERIAL_LEN];/* 0xD8 - 0xE7 ascii serial number */
__u32 total_blocks; /* 0xE8 - 0xEB total blocks */
__u32 scsi_id; /* 0xEC - 0xEF scsi ID */
+#define SPARE_DISK __cpu_to_le32(0x01) /* Spare */
+#define CONFIGURED_DISK __cpu_to_le32(0x02) /* Member of some RaidDev */
+#define FAILED_DISK __cpu_to_le32(0x04) /* Permanent failure */
__u32 status; /* 0xF0 - 0xF3 */
-#define SPARE_DISK 0x01 /* Spare */
-#define CONFIGURED_DISK 0x02 /* Member of some RaidDev */
-#define FAILED_DISK 0x04 /* Permanent failure */
-#define USABLE_DISK 0x08 /* Fully usable unless FAILED_DISK is set */
-
-#define IMSM_DISK_FILLERS 5
+ __u32 owner_cfg_num; /* which config 0,1,2... owns this disk */
+#define IMSM_DISK_FILLERS 4
__u32 filler[IMSM_DISK_FILLERS]; /* 0xF4 - 0x107 MPB_DISK_FILLERS for future expansion */
};
__u8 map_state; /* Normal, Uninitialized, Degraded, Failed */
#define IMSM_T_STATE_NORMAL 0
#define IMSM_T_STATE_UNINITIALIZED 1
-#define IMSM_T_STATE_DEGRADED 2 /* FIXME: is this correct? */
-#define IMSM_T_STATE_FAILED 3 /* FIXME: is this correct? */
+#define IMSM_T_STATE_DEGRADED 2
+#define IMSM_T_STATE_FAILED 3
__u8 raid_level;
#define IMSM_T_RAID0 0
#define IMSM_T_RAID1 1
#define IMSM_T_RAID5 5 /* since metadata version 1.2.02 ? */
__u8 num_members; /* number of member disks */
- __u8 reserved[3];
+ __u8 num_domains; /* number of parity domains */
+ __u8 failed_disk_num; /* valid only when state is degraded */
+ __u8 ddf;
__u32 filler[7]; /* expansion area */
+#define IMSM_ORD_REBUILD (1 << 24)
__u32 disk_ord_tbl[1]; /* disk_ord_tbl[num_members],
- top byte special */
+ * top byte contains some flags
+ */
} __attribute__ ((packed));
struct imsm_vol {
- __u32 reserved[2];
+ __u32 curr_migr_unit;
+ __u32 checkpoint_id; /* id to access curr_migr_unit */
__u8 migr_state; /* Normal or Migrating */
+#define MIGR_INIT 0
+#define MIGR_REBUILD 1
+#define MIGR_VERIFY 2 /* analagous to echo check > sync_action */
+#define MIGR_GEN_MIGR 3
+#define MIGR_STATE_CHANGE 4
+#define MIGR_REPAIR 5
__u8 migr_type; /* Initializing, Rebuilding, ... */
__u8 dirty;
- __u8 fill[1];
- __u32 filler[5];
+ __u8 fs_state; /* fast-sync state for CnG (0xff == disabled) */
+ __u16 verify_errors; /* number of mismatches */
+ __u16 bad_blocks; /* number of bad blocks during verify */
+ __u32 filler[4];
struct imsm_map map[1];
/* here comes another one if migr_state */
} __attribute__ ((packed));
struct imsm_dev {
- __u8 volume[MAX_RAID_SERIAL_LEN];
+ __u8 volume[MAX_RAID_SERIAL_LEN];
__u32 size_low;
__u32 size_high;
+#define DEV_BOOTABLE __cpu_to_le32(0x01)
+#define DEV_BOOT_DEVICE __cpu_to_le32(0x02)
+#define DEV_READ_COALESCING __cpu_to_le32(0x04)
+#define DEV_WRITE_COALESCING __cpu_to_le32(0x08)
+#define DEV_LAST_SHUTDOWN_DIRTY __cpu_to_le32(0x10)
+#define DEV_HIDDEN_AT_BOOT __cpu_to_le32(0x20)
+#define DEV_CURRENTLY_HIDDEN __cpu_to_le32(0x40)
+#define DEV_VERIFY_AND_FIX __cpu_to_le32(0x80)
+#define DEV_MAP_STATE_UNINIT __cpu_to_le32(0x100)
+#define DEV_NO_AUTO_RECOVERY __cpu_to_le32(0x200)
+#define DEV_CLONE_N_GO __cpu_to_le32(0x400)
+#define DEV_CLONE_MAN_SYNC __cpu_to_le32(0x800)
+#define DEV_CNG_MASTER_DISK_NUM __cpu_to_le32(0x1000)
__u32 status; /* Persistent RaidDev status */
__u32 reserved_blocks; /* Reserved blocks at beginning of volume */
-#define IMSM_DEV_FILLERS 12
+ __u8 migr_priority;
+ __u8 num_sub_vols;
+ __u8 tid;
+ __u8 cng_master_disk;
+ __u16 cache_policy;
+ __u8 cng_state;
+ __u8 cng_sub_state;
+#define IMSM_DEV_FILLERS 10
__u32 filler[IMSM_DEV_FILLERS];
struct imsm_vol vol;
} __attribute__ ((packed));
__u32 mpb_size; /* 0x24 - 0x27 Size of MPB */
__u32 family_num; /* 0x28 - 0x2B Checksum from first time this config was written */
__u32 generation_num; /* 0x2C - 0x2F Incremented each time this array's MPB is written */
- __u32 reserved[2]; /* 0x30 - 0x37 */
+ __u32 error_log_size; /* 0x30 - 0x33 in bytes */
+ __u32 attributes; /* 0x34 - 0x37 */
__u8 num_disks; /* 0x38 Number of configured disks */
__u8 num_raid_devs; /* 0x39 Number of configured volumes */
- __u8 fill[2]; /* 0x3A - 0x3B */
-#define IMSM_FILLERS 39
- __u32 filler[IMSM_FILLERS]; /* 0x3C - 0xD7 RAID_MPB_FILLERS */
+ __u8 error_log_pos; /* 0x3A */
+ __u8 fill[1]; /* 0x3B */
+ __u32 cache_size; /* 0x3c - 0x40 in mb */
+ __u32 orig_family_num; /* 0x40 - 0x43 original family num */
+ __u32 pwr_cycle_count; /* 0x44 - 0x47 simulated power cycle count for array */
+ __u32 bbm_log_size; /* 0x48 - 0x4B - size of bad Block Mgmt Log in bytes */
+#define IMSM_FILLERS 35
+ __u32 filler[IMSM_FILLERS]; /* 0x4C - 0xD7 RAID_MPB_FILLERS */
struct imsm_disk disk[1]; /* 0xD8 diskTbl[numDisks] */
/* here comes imsm_dev[num_raid_devs] */
+ /* here comes BBM logs */
} __attribute__ ((packed));
+#define BBM_LOG_MAX_ENTRIES 254
+
+struct bbm_log_entry {
+ __u64 defective_block_start;
+#define UNREADABLE 0xFFFFFFFF
+ __u32 spare_block_offset;
+ __u16 remapped_marked_count;
+ __u16 disk_ordinal;
+} __attribute__ ((__packed__));
+
+struct bbm_log {
+ __u32 signature; /* 0xABADB10C */
+ __u32 entry_count;
+ __u32 reserved_spare_block_count; /* 0 */
+ __u32 reserved; /* 0xFFFF */
+ __u64 first_spare_lba;
+ struct bbm_log_entry mapped_block_entries[BBM_LOG_MAX_ENTRIES];
+} __attribute__ ((__packed__));
+
+
#ifndef MDASSEMBLE
static char *map_state_str[] = { "normal", "uninitialized", "degraded", "failed" };
#endif
+static __u8 migr_type(struct imsm_dev *dev)
+{
+ if (dev->vol.migr_type == MIGR_VERIFY &&
+ dev->status & DEV_VERIFY_AND_FIX)
+ return MIGR_REPAIR;
+ else
+ return dev->vol.migr_type;
+}
+
+static void set_migr_type(struct imsm_dev *dev, __u8 migr_type)
+{
+ /* for compatibility with older oroms convert MIGR_REPAIR, into
+ * MIGR_VERIFY w/ DEV_VERIFY_AND_FIX status
+ */
+ if (migr_type == MIGR_REPAIR) {
+ dev->vol.migr_type = MIGR_VERIFY;
+ dev->status |= DEV_VERIFY_AND_FIX;
+ } else {
+ dev->vol.migr_type = migr_type;
+ dev->status &= ~DEV_VERIFY_AND_FIX;
+ }
+}
+
static unsigned int sector_count(__u32 bytes)
{
return ((bytes + (512-1)) & (~(512-1))) / 512;
return sector_count(__le32_to_cpu(mpb->mpb_size));
}
+struct intel_dev {
+ struct imsm_dev *dev;
+ struct intel_dev *next;
+ int index;
+};
+
/* internal representation of IMSM metadata */
struct intel_super {
union {
- struct imsm_super *mpb;
- void *buf;
+ void *buf; /* O_DIRECT buffer for reading/writing metadata */
+ struct imsm_super *anchor; /* immovable parameters */
};
+ size_t len; /* size of the 'buf' allocation */
+ void *next_buf; /* for realloc'ing buf from the manager */
+ size_t next_len;
int updates_pending; /* count of pending updates for mdmon */
int creating_imsm; /* flag to indicate container creation */
int current_vol; /* index of raid device undergoing creation */
+ __u32 create_offset; /* common start for 'current_vol' */
+ __u32 random; /* random data for seeding new family numbers */
+ struct intel_dev *devlist;
struct dl {
struct dl *next;
int index;
__u8 serial[MAX_RAID_SERIAL_LEN];
int major, minor;
char *devname;
+ struct imsm_disk disk;
int fd;
+ int extent_cnt;
+ struct extent *e; /* for determining freespace @ create */
+ int raiddisk; /* slot to fill in autolayout */
} *disks;
+ struct dl *add; /* list of disks to add while mdmon active */
+ struct dl *missing; /* disks removed while we weren't looking */
+ struct bbm_log *bbm_log;
+ const char *hba; /* device path of the raid controller for this metadata */
+ const struct imsm_orom *orom; /* platform firmware support */
+ struct intel_super *next; /* (temp) list for disambiguating family_num */
+};
+
+struct intel_disk {
+ struct imsm_disk disk;
+ #define IMSM_UNKNOWN_OWNER (-1)
+ int owner;
+ struct intel_disk *next;
};
struct extent {
unsigned long long start, size;
};
+/* definition of messages passed to imsm_process_update */
+enum imsm_update_type {
+ update_activate_spare,
+ update_create_array,
+ update_add_disk,
+};
+
+struct imsm_update_activate_spare {
+ enum imsm_update_type type;
+ struct dl *dl;
+ int slot;
+ int array;
+ struct imsm_update_activate_spare *next;
+};
+
+struct disk_info {
+ __u8 serial[MAX_RAID_SERIAL_LEN];
+};
+
+struct imsm_update_create_array {
+ enum imsm_update_type type;
+ int dev_idx;
+ struct imsm_dev dev;
+};
+
+struct imsm_update_add_disk {
+ enum imsm_update_type type;
+};
+
static struct supertype *match_metadata_desc_imsm(char *arg)
{
struct supertype *st;
return st;
}
+#ifndef MDASSEMBLE
static __u8 *get_imsm_version(struct imsm_super *mpb)
{
return &mpb->sig[MPB_SIG_LEN];
}
+#endif
-static struct imsm_disk *get_imsm_disk(struct imsm_super *mpb, __u8 index)
+/* retrieve a disk directly from the anchor when the anchor is known to be
+ * up-to-date, currently only at load time
+ */
+static struct imsm_disk *__get_imsm_disk(struct imsm_super *mpb, __u8 index)
{
- if (index > mpb->num_disks - 1)
+ if (index >= mpb->num_disks)
return NULL;
return &mpb->disk[index];
}
-static __u32 gen_imsm_checksum(struct imsm_super *mpb)
+#ifndef MDASSEMBLE
+/* retrieve a disk from the parsed metadata */
+static struct imsm_disk *get_imsm_disk(struct intel_super *super, __u8 index)
+{
+ struct dl *d;
+
+ for (d = super->disks; d; d = d->next)
+ if (d->index == index)
+ return &d->disk;
+
+ return NULL;
+}
+#endif
+
+/* generate a checksum directly from the anchor when the anchor is known to be
+ * up-to-date, currently only at load or write_super after coalescing
+ */
+static __u32 __gen_imsm_checksum(struct imsm_super *mpb)
{
__u32 end = mpb->mpb_size / sizeof(end);
__u32 *p = (__u32 *) mpb;
__u32 sum = 0;
- while (end--)
- sum += __le32_to_cpu(*p++);
+ while (end--) {
+ sum += __le32_to_cpu(*p);
+ p++;
+ }
return sum - __le32_to_cpu(mpb->check_sum);
}
-static size_t sizeof_imsm_dev(struct imsm_dev *dev)
+static size_t sizeof_imsm_map(struct imsm_map *map)
+{
+ return sizeof(struct imsm_map) + sizeof(__u32) * (map->num_members - 1);
+}
+
+struct imsm_map *get_imsm_map(struct imsm_dev *dev, int second_map)
{
- size_t size = sizeof(*dev);
+ struct imsm_map *map = &dev->vol.map[0];
+
+ if (second_map && !dev->vol.migr_state)
+ return NULL;
+ else if (second_map) {
+ void *ptr = map;
+
+ return ptr + sizeof_imsm_map(map);
+ } else
+ return map;
+
+}
- /* each map has disk_ord_tbl[num_members - 1] additional space */
- size += sizeof(__u32) * (dev->vol.map[0].num_members - 1);
+/* return the size of the device.
+ * migr_state increases the returned size if map[0] were to be duplicated
+ */
+static size_t sizeof_imsm_dev(struct imsm_dev *dev, int migr_state)
+{
+ size_t size = sizeof(*dev) - sizeof(struct imsm_map) +
+ sizeof_imsm_map(get_imsm_map(dev, 0));
/* migrating means an additional map */
- if (dev->vol.migr_state) {
- size += sizeof(struct imsm_map);
- size += sizeof(__u32) * (dev->vol.map[1].num_members - 1);
- }
+ if (dev->vol.migr_state)
+ size += sizeof_imsm_map(get_imsm_map(dev, 1));
+ else if (migr_state)
+ size += sizeof_imsm_map(get_imsm_map(dev, 0));
return size;
}
-static struct imsm_dev *get_imsm_dev(struct imsm_super *mpb, __u8 index)
+#ifndef MDASSEMBLE
+/* retrieve disk serial number list from a metadata update */
+static struct disk_info *get_disk_info(struct imsm_update_create_array *update)
+{
+ void *u = update;
+ struct disk_info *inf;
+
+ inf = u + sizeof(*update) - sizeof(struct imsm_dev) +
+ sizeof_imsm_dev(&update->dev, 0);
+
+ return inf;
+}
+#endif
+
+static struct imsm_dev *__get_imsm_dev(struct imsm_super *mpb, __u8 index)
{
int offset;
int i;
void *_mpb = mpb;
- if (index > mpb->num_raid_devs - 1)
+ if (index >= mpb->num_raid_devs)
return NULL;
/* devices start after all disks */
if (i == index)
return _mpb + offset;
else
- offset += sizeof_imsm_dev(_mpb + offset);
+ offset += sizeof_imsm_dev(_mpb + offset, 0);
+
+ return NULL;
+}
+
+static struct imsm_dev *get_imsm_dev(struct intel_super *super, __u8 index)
+{
+ struct intel_dev *dv;
+ if (index >= super->anchor->num_raid_devs)
+ return NULL;
+ for (dv = super->devlist; dv; dv = dv->next)
+ if (dv->index == index)
+ return dv->dev;
return NULL;
}
-static __u32 get_imsm_disk_idx(struct imsm_map *map, int slot)
+static __u32 get_imsm_ord_tbl_ent(struct imsm_dev *dev, int slot)
+{
+ struct imsm_map *map;
+
+ if (dev->vol.migr_state)
+ map = get_imsm_map(dev, 1);
+ else
+ map = get_imsm_map(dev, 0);
+
+ /* top byte identifies disk under rebuild */
+ return __le32_to_cpu(map->disk_ord_tbl[slot]);
+}
+
+#define ord_to_idx(ord) (((ord) << 8) >> 8)
+static __u32 get_imsm_disk_idx(struct imsm_dev *dev, int slot)
+{
+ __u32 ord = get_imsm_ord_tbl_ent(dev, slot);
+
+ return ord_to_idx(ord);
+}
+
+static void set_imsm_ord_tbl_ent(struct imsm_map *map, int slot, __u32 ord)
+{
+ map->disk_ord_tbl[slot] = __cpu_to_le32(ord);
+}
+
+static int get_imsm_disk_slot(struct imsm_map *map, int idx)
{
- __u32 *ord_tbl = &map->disk_ord_tbl[slot];
+ int slot;
+ __u32 ord;
+
+ for (slot = 0; slot < map->num_members; slot++) {
+ ord = __le32_to_cpu(map->disk_ord_tbl[slot]);
+ if (ord_to_idx(ord) == idx)
+ return slot;
+ }
- /* top byte is 'special' */
- return __le32_to_cpu(*ord_tbl & ~(0xff << 24));
+ return -1;
}
static int get_imsm_raid_level(struct imsm_map *map)
return 0;
}
-static struct extent *get_extents(struct intel_super *super, struct dl *dl)
+static int count_memberships(struct dl *dl, struct intel_super *super)
{
- /* find a list of used extents on the given physical device */
- struct imsm_super *mpb = super->mpb;
- struct imsm_disk *disk;
- struct extent *rv, *e;
- int i, j;
int memberships = 0;
+ int i;
- disk = get_imsm_disk(mpb, dl->index);
- if (!disk)
- return NULL;
+ for (i = 0; i < super->anchor->num_raid_devs; i++) {
+ struct imsm_dev *dev = get_imsm_dev(super, i);
+ struct imsm_map *map = get_imsm_map(dev, 0);
- for (i = 0; i < mpb->num_raid_devs; i++) {
- struct imsm_dev *dev = get_imsm_dev(mpb, i);
- struct imsm_map *map = dev->vol.map;
+ if (get_imsm_disk_slot(map, dl->index) >= 0)
+ memberships++;
+ }
- for (j = 0; j < map->num_members; j++) {
- __u32 index = get_imsm_disk_idx(map, j);
+ return memberships;
+}
+
+static struct extent *get_extents(struct intel_super *super, struct dl *dl)
+{
+ /* find a list of used extents on the given physical device */
+ struct extent *rv, *e;
+ int i;
+ int memberships = count_memberships(dl, super);
+ __u32 reservation = MPB_SECTOR_CNT + IMSM_RESERVED_SECTORS;
- if (index == dl->index)
- memberships++;
- }
- }
rv = malloc(sizeof(struct extent) * (memberships + 1));
if (!rv)
return NULL;
e = rv;
- for (i = 0; i < mpb->num_raid_devs; i++) {
- struct imsm_dev *dev = get_imsm_dev(mpb, i);
- struct imsm_map *map = dev->vol.map;
-
- for (j = 0; j < map->num_members; j++) {
- __u32 index = get_imsm_disk_idx(map, j);
+ for (i = 0; i < super->anchor->num_raid_devs; i++) {
+ struct imsm_dev *dev = get_imsm_dev(super, i);
+ struct imsm_map *map = get_imsm_map(dev, 0);
- if (index == dl->index) {
- e->start = __le32_to_cpu(map->pba_of_lba0);
- e->size = __le32_to_cpu(map->blocks_per_member);
- e++;
- }
+ if (get_imsm_disk_slot(map, dl->index) >= 0) {
+ e->start = __le32_to_cpu(map->pba_of_lba0);
+ e->size = __le32_to_cpu(map->blocks_per_member);
+ e++;
}
}
qsort(rv, memberships, sizeof(*rv), cmp_extent);
- e->start = __le32_to_cpu(disk->total_blocks) -
- (MPB_SECTOR_CNT + IMSM_RESERVED_SECTORS);
+ /* determine the start of the metadata
+ * when no raid devices are defined use the default
+ * ...otherwise allow the metadata to truncate the value
+ * as is the case with older versions of imsm
+ */
+ if (memberships) {
+ struct extent *last = &rv[memberships - 1];
+ __u32 remainder;
+
+ remainder = __le32_to_cpu(dl->disk.total_blocks) -
+ (last->start + last->size);
+ /* round down to 1k block to satisfy precision of the kernel
+ * 'size' interface
+ */
+ remainder &= ~1UL;
+ /* make sure remainder is still sane */
+ if (remainder < ROUND_UP(super->len, 512) >> 9)
+ remainder = ROUND_UP(super->len, 512) >> 9;
+ if (reservation > remainder)
+ reservation = remainder;
+ }
+ e->start = __le32_to_cpu(dl->disk.total_blocks) - reservation;
e->size = 0;
return rv;
}
+/* try to determine how much space is reserved for metadata from
+ * the last get_extents() entry, otherwise fallback to the
+ * default
+ */
+static __u32 imsm_reserved_sectors(struct intel_super *super, struct dl *dl)
+{
+ struct extent *e;
+ int i;
+ __u32 rv;
+
+ /* for spares just return a minimal reservation which will grow
+ * once the spare is picked up by an array
+ */
+ if (dl->index == -1)
+ return MPB_SECTOR_CNT;
+
+ e = get_extents(super, dl);
+ if (!e)
+ return MPB_SECTOR_CNT + IMSM_RESERVED_SECTORS;
+
+ /* scroll to last entry */
+ for (i = 0; e[i].size; i++)
+ continue;
+
+ rv = __le32_to_cpu(dl->disk.total_blocks) - e[i].start;
+
+ free(e);
+
+ return rv;
+}
+
+static int is_spare(struct imsm_disk *disk)
+{
+ return (disk->status & SPARE_DISK) == SPARE_DISK;
+}
+
+static int is_configured(struct imsm_disk *disk)
+{
+ return (disk->status & CONFIGURED_DISK) == CONFIGURED_DISK;
+}
+
+static int is_failed(struct imsm_disk *disk)
+{
+ return (disk->status & FAILED_DISK) == FAILED_DISK;
+}
+
#ifndef MDASSEMBLE
-static void print_imsm_dev(struct imsm_dev *dev, int index)
+static __u64 blocks_per_migr_unit(struct imsm_dev *dev);
+
+static void print_imsm_dev(struct imsm_dev *dev, char *uuid, int disk_idx)
{
__u64 sz;
int slot;
- struct imsm_map *map = dev->vol.map;
+ struct imsm_map *map = get_imsm_map(dev, 0);
+ __u32 ord;
printf("\n");
- printf("[%s]:\n", dev->volume);
+ printf("[%.16s]:\n", dev->volume);
+ printf(" UUID : %s\n", uuid);
printf(" RAID Level : %d\n", get_imsm_raid_level(map));
printf(" Members : %d\n", map->num_members);
- for (slot = 0; slot < map->num_members; slot++)
- if (index == get_imsm_disk_idx(map, slot))
- break;
- if (slot < map->num_members)
- printf(" This Slot : %d\n", slot);
- else
+ slot = get_imsm_disk_slot(map, disk_idx);
+ if (slot >= 0) {
+ ord = get_imsm_ord_tbl_ent(dev, slot);
+ printf(" This Slot : %d%s\n", slot,
+ ord & IMSM_ORD_REBUILD ? " (out-of-sync)" : "");
+ } else
printf(" This Slot : ?\n");
sz = __le32_to_cpu(dev->size_high);
sz <<= 32;
printf(" Chunk Size : %u KiB\n",
__le16_to_cpu(map->blocks_per_strip) / 2);
printf(" Reserved : %d\n", __le32_to_cpu(dev->reserved_blocks));
- printf(" Migrate State : %s\n", dev->vol.migr_state ? "migrating" : "idle");
+ printf(" Migrate State : ");
+ if (dev->vol.migr_state) {
+ if (migr_type(dev) == MIGR_INIT)
+ printf("initialize\n");
+ else if (migr_type(dev) == MIGR_REBUILD)
+ printf("rebuild\n");
+ else if (migr_type(dev) == MIGR_VERIFY)
+ printf("check\n");
+ else if (migr_type(dev) == MIGR_GEN_MIGR)
+ printf("general migration\n");
+ else if (migr_type(dev) == MIGR_STATE_CHANGE)
+ printf("state change\n");
+ else if (migr_type(dev) == MIGR_REPAIR)
+ printf("repair\n");
+ else
+ printf("<unknown:%d>\n", migr_type(dev));
+ } else
+ printf("idle\n");
+ printf(" Map State : %s", map_state_str[map->map_state]);
+ if (dev->vol.migr_state) {
+ struct imsm_map *map = get_imsm_map(dev, 1);
+
+ printf(" <-- %s", map_state_str[map->map_state]);
+ printf("\n Checkpoint : %u (%llu)",
+ __le32_to_cpu(dev->vol.curr_migr_unit),
+ blocks_per_migr_unit(dev));
+ }
+ printf("\n");
printf(" Dirty State : %s\n", dev->vol.dirty ? "dirty" : "clean");
- printf(" Map State : %s\n", map_state_str[map->map_state]);
}
-static void print_imsm_disk(struct imsm_super *mpb, int index)
+static void print_imsm_disk(struct imsm_super *mpb, int index, __u32 reserved)
{
- struct imsm_disk *disk = get_imsm_disk(mpb, index);
- char str[MAX_RAID_SERIAL_LEN];
- __u32 s;
+ struct imsm_disk *disk = __get_imsm_disk(mpb, index);
+ char str[MAX_RAID_SERIAL_LEN + 1];
__u64 sz;
+ if (index < 0)
+ return;
+
printf("\n");
- snprintf(str, MAX_RAID_SERIAL_LEN, "%s", disk->serial);
+ snprintf(str, MAX_RAID_SERIAL_LEN + 1, "%s", disk->serial);
printf(" Disk%02d Serial : %s\n", index, str);
- s = __le32_to_cpu(disk->status);
- printf(" State :%s%s%s%s\n", s&SPARE_DISK ? " spare" : "",
- s&CONFIGURED_DISK ? " active" : "",
- s&FAILED_DISK ? " failed" : "",
- s&USABLE_DISK ? " usable" : "");
+ printf(" State :%s%s%s\n", is_spare(disk) ? " spare" : "",
+ is_configured(disk) ? " active" : "",
+ is_failed(disk) ? " failed" : "");
printf(" Id : %08x\n", __le32_to_cpu(disk->scsi_id));
- sz = __le32_to_cpu(disk->total_blocks) -
- (MPB_SECTOR_CNT + IMSM_RESERVED_SECTORS * mpb->num_raid_devs);
+ sz = __le32_to_cpu(disk->total_blocks) - reserved;
printf(" Usable Size : %llu%s\n", (unsigned long long)sz,
human_size(sz * 512));
}
+static void getinfo_super_imsm(struct supertype *st, struct mdinfo *info);
+
static void examine_super_imsm(struct supertype *st, char *homehost)
{
struct intel_super *super = st->sb;
- struct imsm_super *mpb = super->mpb;
+ struct imsm_super *mpb = super->anchor;
char str[MAX_SIGNATURE_LENGTH];
int i;
+ struct mdinfo info;
+ char nbuf[64];
__u32 sum;
+ __u32 reserved = imsm_reserved_sectors(super, super->disks);
+
snprintf(str, MPB_SIG_LEN, "%s", mpb->sig);
printf(" Magic : %s\n", str);
snprintf(str, strlen(MPB_VERSION_RAID0), "%s", get_imsm_version(mpb));
printf(" Version : %s\n", get_imsm_version(mpb));
+ printf(" Orig Family : %08x\n", __le32_to_cpu(mpb->orig_family_num));
printf(" Family : %08x\n", __le32_to_cpu(mpb->family_num));
printf(" Generation : %08x\n", __le32_to_cpu(mpb->generation_num));
+ getinfo_super_imsm(st, &info);
+ fname_from_uuid(st, &info, nbuf, ':');
+ printf(" UUID : %s\n", nbuf + 5);
sum = __le32_to_cpu(mpb->check_sum);
printf(" Checksum : %08x %s\n", sum,
- gen_imsm_checksum(mpb) == sum ? "correct" : "incorrect");
+ __gen_imsm_checksum(mpb) == sum ? "correct" : "incorrect");
printf(" MPB Sectors : %d\n", mpb_sectors(mpb));
printf(" Disks : %d\n", mpb->num_disks);
printf(" RAID Devices : %d\n", mpb->num_raid_devs);
- print_imsm_disk(mpb, super->disks->index);
- for (i = 0; i < mpb->num_raid_devs; i++)
- print_imsm_dev(get_imsm_dev(mpb, i), super->disks->index);
+ print_imsm_disk(mpb, super->disks->index, reserved);
+ if (super->bbm_log) {
+ struct bbm_log *log = super->bbm_log;
+
+ printf("\n");
+ printf("Bad Block Management Log:\n");
+ printf(" Log Size : %d\n", __le32_to_cpu(mpb->bbm_log_size));
+ printf(" Signature : %x\n", __le32_to_cpu(log->signature));
+ printf(" Entry Count : %d\n", __le32_to_cpu(log->entry_count));
+ printf(" Spare Blocks : %d\n", __le32_to_cpu(log->reserved_spare_block_count));
+ printf(" First Spare : %llx\n",
+ (unsigned long long) __le64_to_cpu(log->first_spare_lba));
+ }
+ for (i = 0; i < mpb->num_raid_devs; i++) {
+ struct mdinfo info;
+ struct imsm_dev *dev = __get_imsm_dev(mpb, i);
+
+ super->current_vol = i;
+ getinfo_super_imsm(st, &info);
+ fname_from_uuid(st, &info, nbuf, ':');
+ print_imsm_dev(dev, nbuf + 5, super->disks->index);
+ }
for (i = 0; i < mpb->num_disks; i++) {
if (i == super->disks->index)
continue;
- print_imsm_disk(mpb, i);
+ print_imsm_disk(mpb, i, reserved);
+ }
+}
+
+static void brief_examine_super_imsm(struct supertype *st, int verbose)
+{
+ /* We just write a generic IMSM ARRAY entry */
+ struct mdinfo info;
+ char nbuf[64];
+ struct intel_super *super = st->sb;
+
+ if (!super->anchor->num_raid_devs) {
+ printf("ARRAY metadata=imsm\n");
+ return;
}
+
+ getinfo_super_imsm(st, &info);
+ fname_from_uuid(st, &info, nbuf, ':');
+ printf("ARRAY metadata=imsm UUID=%s\n", nbuf + 5);
}
-static void brief_examine_super_imsm(struct supertype *st)
+static void brief_examine_subarrays_imsm(struct supertype *st, int verbose)
{
+ /* We just write a generic IMSM ARRAY entry */
+ struct mdinfo info;
+ char nbuf[64];
+ char nbuf1[64];
struct intel_super *super = st->sb;
- struct imsm_super *mpb = super->mpb;
+ int i;
+
+ if (!super->anchor->num_raid_devs)
+ return;
+
+ getinfo_super_imsm(st, &info);
+ fname_from_uuid(st, &info, nbuf, ':');
+ for (i = 0; i < super->anchor->num_raid_devs; i++) {
+ struct imsm_dev *dev = get_imsm_dev(super, i);
+
+ super->current_vol = i;
+ getinfo_super_imsm(st, &info);
+ fname_from_uuid(st, &info, nbuf1, ':');
+ printf("ARRAY /dev/md/%.16s container=%s member=%d UUID=%s\n",
+ dev->volume, nbuf + 5, i, nbuf1 + 5);
+ }
+}
- printf("ARRAY /dev/imsm family=%08x metadata=external:imsm\n",
- __le32_to_cpu(mpb->family_num));
+static void export_examine_super_imsm(struct supertype *st)
+{
+ struct intel_super *super = st->sb;
+ struct imsm_super *mpb = super->anchor;
+ struct mdinfo info;
+ char nbuf[64];
+
+ getinfo_super_imsm(st, &info);
+ fname_from_uuid(st, &info, nbuf, ':');
+ printf("MD_METADATA=imsm\n");
+ printf("MD_LEVEL=container\n");
+ printf("MD_UUID=%s\n", nbuf+5);
+ printf("MD_DEVICES=%u\n", mpb->num_disks);
}
static void detail_super_imsm(struct supertype *st, char *homehost)
{
- printf("%s\n", __FUNCTION__);
+ struct mdinfo info;
+ char nbuf[64];
+
+ getinfo_super_imsm(st, &info);
+ fname_from_uuid(st, &info, nbuf, ':');
+ printf("\n UUID : %s\n", nbuf + 5);
}
static void brief_detail_super_imsm(struct supertype *st)
{
- printf("%s\n", __FUNCTION__);
+ struct mdinfo info;
+ char nbuf[64];
+ getinfo_super_imsm(st, &info);
+ fname_from_uuid(st, &info, nbuf, ':');
+ printf(" UUID=%s", nbuf + 5);
+}
+
+static int imsm_read_serial(int fd, char *devname, __u8 *serial);
+static void fd2devname(int fd, char *name);
+
+static int imsm_enumerate_ports(const char *hba_path, int port_count, int host_base, int verbose)
+{
+ /* dump an unsorted list of devices attached to ahci, as well as
+ * non-connected ports
+ */
+ int hba_len = strlen(hba_path) + 1;
+ struct dirent *ent;
+ DIR *dir;
+ char *path = NULL;
+ int err = 0;
+ unsigned long port_mask = (1 << port_count) - 1;
+
+ if (port_count > sizeof(port_mask) * 8) {
+ if (verbose)
+ fprintf(stderr, Name ": port_count %d out of range\n", port_count);
+ return 2;
+ }
+
+ /* scroll through /sys/dev/block looking for devices attached to
+ * this hba
+ */
+ dir = opendir("/sys/dev/block");
+ for (ent = dir ? readdir(dir) : NULL; ent; ent = readdir(dir)) {
+ int fd;
+ char model[64];
+ char vendor[64];
+ char buf[1024];
+ int major, minor;
+ char *device;
+ char *c;
+ int port;
+ int type;
+
+ if (sscanf(ent->d_name, "%d:%d", &major, &minor) != 2)
+ continue;
+ path = devt_to_devpath(makedev(major, minor));
+ if (!path)
+ continue;
+ if (!path_attached_to_hba(path, hba_path)) {
+ free(path);
+ path = NULL;
+ continue;
+ }
+
+ /* retrieve the scsi device type */
+ if (asprintf(&device, "/sys/dev/block/%d:%d/device/xxxxxxx", major, minor) < 0) {
+ if (verbose)
+ fprintf(stderr, Name ": failed to allocate 'device'\n");
+ err = 2;
+ break;
+ }
+ sprintf(device, "/sys/dev/block/%d:%d/device/type", major, minor);
+ if (load_sys(device, buf) != 0) {
+ if (verbose)
+ fprintf(stderr, Name ": failed to read device type for %s\n",
+ path);
+ err = 2;
+ free(device);
+ break;
+ }
+ type = strtoul(buf, NULL, 10);
+
+ /* if it's not a disk print the vendor and model */
+ if (!(type == 0 || type == 7 || type == 14)) {
+ vendor[0] = '\0';
+ model[0] = '\0';
+ sprintf(device, "/sys/dev/block/%d:%d/device/vendor", major, minor);
+ if (load_sys(device, buf) == 0) {
+ strncpy(vendor, buf, sizeof(vendor));
+ vendor[sizeof(vendor) - 1] = '\0';
+ c = (char *) &vendor[sizeof(vendor) - 1];
+ while (isspace(*c) || *c == '\0')
+ *c-- = '\0';
+
+ }
+ sprintf(device, "/sys/dev/block/%d:%d/device/model", major, minor);
+ if (load_sys(device, buf) == 0) {
+ strncpy(model, buf, sizeof(model));
+ model[sizeof(model) - 1] = '\0';
+ c = (char *) &model[sizeof(model) - 1];
+ while (isspace(*c) || *c == '\0')
+ *c-- = '\0';
+ }
+
+ if (vendor[0] && model[0])
+ sprintf(buf, "%.64s %.64s", vendor, model);
+ else
+ switch (type) { /* numbers from hald/linux/device.c */
+ case 1: sprintf(buf, "tape"); break;
+ case 2: sprintf(buf, "printer"); break;
+ case 3: sprintf(buf, "processor"); break;
+ case 4:
+ case 5: sprintf(buf, "cdrom"); break;
+ case 6: sprintf(buf, "scanner"); break;
+ case 8: sprintf(buf, "media_changer"); break;
+ case 9: sprintf(buf, "comm"); break;
+ case 12: sprintf(buf, "raid"); break;
+ default: sprintf(buf, "unknown");
+ }
+ } else
+ buf[0] = '\0';
+ free(device);
+
+ /* chop device path to 'host%d' and calculate the port number */
+ c = strchr(&path[hba_len], '/');
+ *c = '\0';
+ if (sscanf(&path[hba_len], "host%d", &port) == 1)
+ port -= host_base;
+ else {
+ if (verbose) {
+ *c = '/'; /* repair the full string */
+ fprintf(stderr, Name ": failed to determine port number for %s\n",
+ path);
+ }
+ err = 2;
+ break;
+ }
+
+ /* mark this port as used */
+ port_mask &= ~(1 << port);
+
+ /* print out the device information */
+ if (buf[0]) {
+ printf(" Port%d : - non-disk device (%s) -\n", port, buf);
+ continue;
+ }
+
+ fd = dev_open(ent->d_name, O_RDONLY);
+ if (fd < 0)
+ printf(" Port%d : - disk info unavailable -\n", port);
+ else {
+ fd2devname(fd, buf);
+ printf(" Port%d : %s", port, buf);
+ if (imsm_read_serial(fd, NULL, (__u8 *) buf) == 0)
+ printf(" (%s)\n", buf);
+ else
+ printf("()\n");
+ }
+ close(fd);
+ free(path);
+ path = NULL;
+ }
+ if (path)
+ free(path);
+ if (dir)
+ closedir(dir);
+ if (err == 0) {
+ int i;
+
+ for (i = 0; i < port_count; i++)
+ if (port_mask & (1 << i))
+ printf(" Port%d : - no device attached -\n", i);
+ }
+
+ return err;
+}
+
+static int detail_platform_imsm(int verbose, int enumerate_only)
+{
+ /* There are two components to imsm platform support, the ahci SATA
+ * controller and the option-rom. To find the SATA controller we
+ * simply look in /sys/bus/pci/drivers/ahci to see if an ahci
+ * controller with the Intel vendor id is present. This approach
+ * allows mdadm to leverage the kernel's ahci detection logic, with the
+ * caveat that if ahci.ko is not loaded mdadm will not be able to
+ * detect platform raid capabilities. The option-rom resides in a
+ * platform "Adapter ROM". We scan for its signature to retrieve the
+ * platform capabilities. If raid support is disabled in the BIOS the
+ * option-rom capability structure will not be available.
+ */
+ const struct imsm_orom *orom;
+ struct sys_dev *list, *hba;
+ DIR *dir;
+ struct dirent *ent;
+ const char *hba_path;
+ int host_base = 0;
+ int port_count = 0;
+
+ if (enumerate_only) {
+ if (check_env("IMSM_NO_PLATFORM") || find_imsm_orom())
+ return 0;
+ return 2;
+ }
+
+ list = find_driver_devices("pci", "ahci");
+ for (hba = list; hba; hba = hba->next)
+ if (devpath_to_vendor(hba->path) == 0x8086)
+ break;
+
+ if (!hba) {
+ if (verbose)
+ fprintf(stderr, Name ": unable to find active ahci controller\n");
+ free_sys_dev(&list);
+ return 2;
+ } else if (verbose)
+ fprintf(stderr, Name ": found Intel SATA AHCI Controller\n");
+ hba_path = hba->path;
+ hba->path = NULL;
+ free_sys_dev(&list);
+
+ orom = find_imsm_orom();
+ if (!orom) {
+ if (verbose)
+ fprintf(stderr, Name ": imsm option-rom not found\n");
+ return 2;
+ }
+
+ printf(" Platform : Intel(R) Matrix Storage Manager\n");
+ printf(" Version : %d.%d.%d.%d\n", orom->major_ver, orom->minor_ver,
+ orom->hotfix_ver, orom->build);
+ printf(" RAID Levels :%s%s%s%s%s\n",
+ imsm_orom_has_raid0(orom) ? " raid0" : "",
+ imsm_orom_has_raid1(orom) ? " raid1" : "",
+ imsm_orom_has_raid1e(orom) ? " raid1e" : "",
+ imsm_orom_has_raid10(orom) ? " raid10" : "",
+ imsm_orom_has_raid5(orom) ? " raid5" : "");
+ printf(" Chunk Sizes :%s%s%s%s%s%s%s%s%s%s%s%s%s%s%s%s\n",
+ imsm_orom_has_chunk(orom, 2) ? " 2k" : "",
+ imsm_orom_has_chunk(orom, 4) ? " 4k" : "",
+ imsm_orom_has_chunk(orom, 8) ? " 8k" : "",
+ imsm_orom_has_chunk(orom, 16) ? " 16k" : "",
+ imsm_orom_has_chunk(orom, 32) ? " 32k" : "",
+ imsm_orom_has_chunk(orom, 64) ? " 64k" : "",
+ imsm_orom_has_chunk(orom, 128) ? " 128k" : "",
+ imsm_orom_has_chunk(orom, 256) ? " 256k" : "",
+ imsm_orom_has_chunk(orom, 512) ? " 512k" : "",
+ imsm_orom_has_chunk(orom, 1024*1) ? " 1M" : "",
+ imsm_orom_has_chunk(orom, 1024*2) ? " 2M" : "",
+ imsm_orom_has_chunk(orom, 1024*4) ? " 4M" : "",
+ imsm_orom_has_chunk(orom, 1024*8) ? " 8M" : "",
+ imsm_orom_has_chunk(orom, 1024*16) ? " 16M" : "",
+ imsm_orom_has_chunk(orom, 1024*32) ? " 32M" : "",
+ imsm_orom_has_chunk(orom, 1024*64) ? " 64M" : "");
+ printf(" Max Disks : %d\n", orom->tds);
+ printf(" Max Volumes : %d\n", orom->vpa);
+ printf(" I/O Controller : %s\n", hba_path);
+
+ /* find the smallest scsi host number to determine a port number base */
+ dir = opendir(hba_path);
+ for (ent = dir ? readdir(dir) : NULL; ent; ent = readdir(dir)) {
+ int host;
+
+ if (sscanf(ent->d_name, "host%d", &host) != 1)
+ continue;
+ if (port_count == 0)
+ host_base = host;
+ else if (host < host_base)
+ host_base = host;
+
+ if (host + 1 > port_count + host_base)
+ port_count = host + 1 - host_base;
+
+ }
+ if (dir)
+ closedir(dir);
+
+ if (!port_count || imsm_enumerate_ports(hba_path, port_count,
+ host_base, verbose) != 0) {
+ if (verbose)
+ fprintf(stderr, Name ": failed to enumerate ports\n");
+ return 2;
+ }
+
+ return 0;
}
#endif
static int match_home_imsm(struct supertype *st, char *homehost)
{
- printf("%s\n", __FUNCTION__);
+ /* the imsm metadata format does not specify any host
+ * identification information. We return -1 since we can never
+ * confirm nor deny whether a given array is "meant" for this
+ * host. We rely on compare_super and the 'family_num' fields to
+ * exclude member disks that do not belong, and we rely on
+ * mdadm.conf to specify the arrays that should be assembled.
+ * Auto-assembly may still pick up "foreign" arrays.
+ */
- return 0;
+ return -1;
}
static void uuid_from_super_imsm(struct supertype *st, int uuid[4])
{
- printf("%s\n", __FUNCTION__);
+ /* The uuid returned here is used for:
+ * uuid to put into bitmap file (Create, Grow)
+ * uuid for backup header when saving critical section (Grow)
+ * comparing uuids when re-adding a device into an array
+ * In these cases the uuid required is that of the data-array,
+ * not the device-set.
+ * uuid to recognise same set when adding a missing device back
+ * to an array. This is a uuid for the device-set.
+ *
+ * For each of these we can make do with a truncated
+ * or hashed uuid rather than the original, as long as
+ * everyone agrees.
+ * In each case the uuid required is that of the data-array,
+ * not the device-set.
+ */
+ /* imsm does not track uuid's so we synthesis one using sha1 on
+ * - The signature (Which is constant for all imsm array, but no matter)
+ * - the orig_family_num of the container
+ * - the index number of the volume
+ * - the 'serial' number of the volume.
+ * Hopefully these are all constant.
+ */
+ struct intel_super *super = st->sb;
+
+ char buf[20];
+ struct sha1_ctx ctx;
+ struct imsm_dev *dev = NULL;
+ __u32 family_num;
+
+ /* some mdadm versions failed to set ->orig_family_num, in which
+ * case fall back to ->family_num. orig_family_num will be
+ * fixed up with the first metadata update.
+ */
+ family_num = super->anchor->orig_family_num;
+ if (family_num == 0)
+ family_num = super->anchor->family_num;
+ sha1_init_ctx(&ctx);
+ sha1_process_bytes(super->anchor->sig, MPB_SIG_LEN, &ctx);
+ sha1_process_bytes(&family_num, sizeof(__u32), &ctx);
+ if (super->current_vol >= 0)
+ dev = get_imsm_dev(super, super->current_vol);
+ if (dev) {
+ __u32 vol = super->current_vol;
+ sha1_process_bytes(&vol, sizeof(vol), &ctx);
+ sha1_process_bytes(dev->volume, MAX_RAID_SERIAL_LEN, &ctx);
+ }
+ sha1_finish_ctx(&ctx, buf);
+ memcpy(uuid, buf, 4*4);
}
#if 0
}
#endif
-static int imsm_level_to_layout(int level)
+static __u32 migr_strip_blocks_resync(struct imsm_dev *dev)
{
- switch (level) {
+ /* migr_strip_size when repairing or initializing parity */
+ struct imsm_map *map = get_imsm_map(dev, 0);
+ __u32 chunk = __le32_to_cpu(map->blocks_per_strip);
+
+ switch (get_imsm_raid_level(map)) {
+ case 5:
+ case 10:
+ return chunk;
+ default:
+ return 128*1024 >> 9;
+ }
+}
+
+static __u32 migr_strip_blocks_rebuild(struct imsm_dev *dev)
+{
+ /* migr_strip_size when rebuilding a degraded disk, no idea why
+ * this is different than migr_strip_size_resync(), but it's good
+ * to be compatible
+ */
+ struct imsm_map *map = get_imsm_map(dev, 1);
+ __u32 chunk = __le32_to_cpu(map->blocks_per_strip);
+
+ switch (get_imsm_raid_level(map)) {
+ case 1:
+ case 10:
+ if (map->num_members % map->num_domains == 0)
+ return 128*1024 >> 9;
+ else
+ return chunk;
+ case 5:
+ return max((__u32) 64*1024 >> 9, chunk);
+ default:
+ return 128*1024 >> 9;
+ }
+}
+
+static __u32 num_stripes_per_unit_resync(struct imsm_dev *dev)
+{
+ struct imsm_map *lo = get_imsm_map(dev, 0);
+ struct imsm_map *hi = get_imsm_map(dev, 1);
+ __u32 lo_chunk = __le32_to_cpu(lo->blocks_per_strip);
+ __u32 hi_chunk = __le32_to_cpu(hi->blocks_per_strip);
+
+ return max((__u32) 1, hi_chunk / lo_chunk);
+}
+
+static __u32 num_stripes_per_unit_rebuild(struct imsm_dev *dev)
+{
+ struct imsm_map *lo = get_imsm_map(dev, 0);
+ int level = get_imsm_raid_level(lo);
+
+ if (level == 1 || level == 10) {
+ struct imsm_map *hi = get_imsm_map(dev, 1);
+
+ return hi->num_domains;
+ } else
+ return num_stripes_per_unit_resync(dev);
+}
+
+static __u8 imsm_num_data_members(struct imsm_dev *dev)
+{
+ /* named 'imsm_' because raid0, raid1 and raid10
+ * counter-intuitively have the same number of data disks
+ */
+ struct imsm_map *map = get_imsm_map(dev, 0);
+
+ switch (get_imsm_raid_level(map)) {
+ case 0:
+ case 1:
+ case 10:
+ return map->num_members;
+ case 5:
+ return map->num_members - 1;
+ default:
+ dprintf("%s: unsupported raid level\n", __func__);
+ return 0;
+ }
+}
+
+static __u32 parity_segment_depth(struct imsm_dev *dev)
+{
+ struct imsm_map *map = get_imsm_map(dev, 0);
+ __u32 chunk = __le32_to_cpu(map->blocks_per_strip);
+
+ switch(get_imsm_raid_level(map)) {
+ case 1:
+ case 10:
+ return chunk * map->num_domains;
+ case 5:
+ return chunk * map->num_members;
+ default:
+ return chunk;
+ }
+}
+
+static __u32 map_migr_block(struct imsm_dev *dev, __u32 block)
+{
+ struct imsm_map *map = get_imsm_map(dev, 1);
+ __u32 chunk = __le32_to_cpu(map->blocks_per_strip);
+ __u32 strip = block / chunk;
+
+ switch (get_imsm_raid_level(map)) {
+ case 1:
+ case 10: {
+ __u32 vol_strip = (strip * map->num_domains) + 1;
+ __u32 vol_stripe = vol_strip / map->num_members;
+
+ return vol_stripe * chunk + block % chunk;
+ } case 5: {
+ __u32 stripe = strip / (map->num_members - 1);
+
+ return stripe * chunk + block % chunk;
+ }
+ default:
+ return 0;
+ }
+}
+
+static __u64 blocks_per_migr_unit(struct imsm_dev *dev)
+{
+ /* calculate the conversion factor between per member 'blocks'
+ * (md/{resync,rebuild}_start) and imsm migration units, return
+ * 0 for the 'not migrating' and 'unsupported migration' cases
+ */
+ if (!dev->vol.migr_state)
+ return 0;
+
+ switch (migr_type(dev)) {
+ case MIGR_VERIFY:
+ case MIGR_REPAIR:
+ case MIGR_INIT: {
+ struct imsm_map *map = get_imsm_map(dev, 0);
+ __u32 stripes_per_unit;
+ __u32 blocks_per_unit;
+ __u32 parity_depth;
+ __u32 migr_chunk;
+ __u32 block_map;
+ __u32 block_rel;
+ __u32 segment;
+ __u32 stripe;
+ __u8 disks;
+
+ /* yes, this is really the translation of migr_units to
+ * per-member blocks in the 'resync' case
+ */
+ stripes_per_unit = num_stripes_per_unit_resync(dev);
+ migr_chunk = migr_strip_blocks_resync(dev);
+ disks = imsm_num_data_members(dev);
+ blocks_per_unit = stripes_per_unit * migr_chunk * disks;
+ stripe = __le32_to_cpu(map->blocks_per_strip) * disks;
+ segment = blocks_per_unit / stripe;
+ block_rel = blocks_per_unit - segment * stripe;
+ parity_depth = parity_segment_depth(dev);
+ block_map = map_migr_block(dev, block_rel);
+ return block_map + parity_depth * segment;
+ }
+ case MIGR_REBUILD: {
+ __u32 stripes_per_unit;
+ __u32 migr_chunk;
+
+ stripes_per_unit = num_stripes_per_unit_rebuild(dev);
+ migr_chunk = migr_strip_blocks_rebuild(dev);
+ return migr_chunk * stripes_per_unit;
+ }
+ case MIGR_GEN_MIGR:
+ case MIGR_STATE_CHANGE:
+ default:
+ return 0;
+ }
+}
+
+static int imsm_level_to_layout(int level)
+{
+ switch (level) {
case 0:
case 1:
return 0;
case 5:
case 6:
- return ALGORITHM_LEFT_SYMMETRIC;
+ return ALGORITHM_LEFT_ASYMMETRIC;
case 10:
- return 0x102; //FIXME is this correct?
+ return 0x102;
}
- return -1;
+ return UnSet;
}
static void getinfo_super_imsm_volume(struct supertype *st, struct mdinfo *info)
{
struct intel_super *super = st->sb;
- struct imsm_super *mpb = super->mpb;
- struct imsm_dev *dev = get_imsm_dev(mpb, super->current_vol);
- struct imsm_map *map = &dev->vol.map[0];
+ struct imsm_dev *dev = get_imsm_dev(super, super->current_vol);
+ struct imsm_map *map = get_imsm_map(dev, 0);
+ struct dl *dl;
+ for (dl = super->disks; dl; dl = dl->next)
+ if (dl->raiddisk == info->disk.raid_disk)
+ break;
info->container_member = super->current_vol;
info->array.raid_disks = map->num_members;
info->array.level = get_imsm_raid_level(map);
info->array.md_minor = -1;
info->array.ctime = 0;
info->array.utime = 0;
- info->array.chunk_size = __le16_to_cpu(map->blocks_per_strip * 512);
+ info->array.chunk_size = __le16_to_cpu(map->blocks_per_strip) << 9;
+ info->array.state = !dev->vol.dirty;
+ info->custom_array_size = __le32_to_cpu(dev->size_high);
+ info->custom_array_size <<= 32;
+ info->custom_array_size |= __le32_to_cpu(dev->size_low);
+
+ info->disk.major = 0;
+ info->disk.minor = 0;
+ if (dl) {
+ info->disk.major = dl->major;
+ info->disk.minor = dl->minor;
+ }
info->data_offset = __le32_to_cpu(map->pba_of_lba0);
info->component_size = __le32_to_cpu(map->blocks_per_member);
+ memset(info->uuid, 0, sizeof(info->uuid));
+
+ if (map->map_state == IMSM_T_STATE_UNINITIALIZED || dev->vol.dirty) {
+ info->resync_start = 0;
+ } else if (dev->vol.migr_state) {
+ switch (migr_type(dev)) {
+ case MIGR_REPAIR:
+ case MIGR_INIT: {
+ __u64 blocks_per_unit = blocks_per_migr_unit(dev);
+ __u64 units = __le32_to_cpu(dev->vol.curr_migr_unit);
+
+ info->resync_start = blocks_per_unit * units;
+ break;
+ }
+ case MIGR_VERIFY:
+ /* we could emulate the checkpointing of
+ * 'sync_action=check' migrations, but for now
+ * we just immediately complete them
+ */
+ case MIGR_REBUILD:
+ /* this is handled by container_content_imsm() */
+ case MIGR_GEN_MIGR:
+ case MIGR_STATE_CHANGE:
+ /* FIXME handle other migrations */
+ default:
+ /* we are not dirty, so... */
+ info->resync_start = MaxSector;
+ }
+ } else
+ info->resync_start = MaxSector;
- info->disk.major = 0;
- info->disk.minor = 0;
+ strncpy(info->name, (char *) dev->volume, MAX_RAID_SERIAL_LEN);
+ info->name[MAX_RAID_SERIAL_LEN] = 0;
+ info->array.major_version = -1;
+ info->array.minor_version = -2;
sprintf(info->text_version, "/%s/%d",
devnum2devname(st->container_dev),
info->container_member);
+ info->safe_mode_delay = 4000; /* 4 secs like the Matrix driver */
+ uuid_from_super_imsm(st, info->uuid);
}
+/* check the config file to see if we can return a real uuid for this spare */
+static void fixup_container_spare_uuid(struct mdinfo *inf)
+{
+ struct mddev_ident_s *array_list;
+
+ if (inf->array.level != LEVEL_CONTAINER ||
+ memcmp(inf->uuid, uuid_match_any, sizeof(int[4])) != 0)
+ return;
+
+ array_list = conf_get_ident(NULL);
+
+ for (; array_list; array_list = array_list->next) {
+ if (array_list->uuid_set) {
+ struct supertype *_sst; /* spare supertype */
+ struct supertype *_cst; /* container supertype */
+
+ _cst = array_list->st;
+ if (_cst)
+ _sst = _cst->ss->match_metadata_desc(inf->text_version);
+ else
+ _sst = NULL;
+
+ if (_sst) {
+ memcpy(inf->uuid, array_list->uuid, sizeof(int[4]));
+ free(_sst);
+ break;
+ }
+ }
+ }
+}
static void getinfo_super_imsm(struct supertype *st, struct mdinfo *info)
{
struct intel_super *super = st->sb;
- struct imsm_super *mpb = super->mpb;
struct imsm_disk *disk;
- __u32 s;
if (super->current_vol >= 0) {
getinfo_super_imsm_volume(st, info);
return;
}
- info->array.raid_disks = mpb->num_disks;
+
+ /* Set raid_disks to zero so that Assemble will always pull in valid
+ * spares
+ */
+ info->array.raid_disks = 0;
info->array.level = LEVEL_CONTAINER;
info->array.layout = 0;
info->array.md_minor = -1;
info->disk.minor = 0;
info->disk.raid_disk = -1;
info->reshape_active = 0;
+ info->array.major_version = -1;
+ info->array.minor_version = -2;
strcpy(info->text_version, "imsm");
+ info->safe_mode_delay = 0;
info->disk.number = -1;
info->disk.state = 0;
+ info->name[0] = 0;
if (super->disks) {
- disk = get_imsm_disk(mpb, super->disks->index);
- info->disk.number = super->disks->index;
- info->disk.raid_disk = super->disks->index;
- info->data_offset = __le32_to_cpu(disk->total_blocks) -
- (MPB_SECTOR_CNT + IMSM_RESERVED_SECTORS);
- info->component_size = MPB_SECTOR_CNT + IMSM_RESERVED_SECTORS;
- s = __le32_to_cpu(disk->status);
- info->disk.state = s & CONFIGURED_DISK ? (1 << MD_DISK_ACTIVE) : 0;
- info->disk.state |= s & FAILED_DISK ? (1 << MD_DISK_FAULTY) : 0;
- info->disk.state |= s & USABLE_DISK ? (1 << MD_DISK_SYNC) : 0;
+ __u32 reserved = imsm_reserved_sectors(super, super->disks);
+
+ disk = &super->disks->disk;
+ info->data_offset = __le32_to_cpu(disk->total_blocks) - reserved;
+ info->component_size = reserved;
+ info->disk.state = is_configured(disk) ? (1 << MD_DISK_ACTIVE) : 0;
+ /* we don't change info->disk.raid_disk here because
+ * this state will be finalized in mdmon after we have
+ * found the 'most fresh' version of the metadata
+ */
+ info->disk.state |= is_failed(disk) ? (1 << MD_DISK_FAULTY) : 0;
+ info->disk.state |= is_spare(disk) ? 0 : (1 << MD_DISK_SYNC);
+ }
+
+ /* only call uuid_from_super_imsm when this disk is part of a populated container,
+ * ->compare_super may have updated the 'num_raid_devs' field for spares
+ */
+ if (info->disk.state & (1 << MD_DISK_SYNC) || super->anchor->num_raid_devs)
+ uuid_from_super_imsm(st, info->uuid);
+ else {
+ memcpy(info->uuid, uuid_match_any, sizeof(int[4]));
+ fixup_container_spare_uuid(info);
}
}
char *update, char *devname, int verbose,
int uuid_set, char *homehost)
{
- /* FIXME */
-
/* For 'assemble' and 'force' we need to return non-zero if any
* change was made. For others, the return value is ignored.
* Update options are:
* linear only
* resync: mark as dirty so a resync will happen.
* name: update the name - preserving the homehost
+ * uuid: Change the uuid of the array to match watch is given
*
* Following are not relevant for this imsm:
* sparc2.2 : update from old dodgey metadata
* super-minor: change the preferred_minor number
* summaries: update redundant counters.
- * uuid: Change the uuid of the array to match watch is given
* homehost: update the recorded homehost
* _reshape_progress: record new reshape_progress position.
*/
- int rv = 0;
- //struct intel_super *super = st->sb;
- //struct imsm_super *mpb = super->mpb;
+ int rv = 1;
+ struct intel_super *super = st->sb;
+ struct imsm_super *mpb;
- if (strcmp(update, "grow") == 0) {
- }
- if (strcmp(update, "resync") == 0) {
- /* dev->vol.dirty = 1; */
- }
+ /* we can only update container info */
+ if (!super || super->current_vol >= 0 || !super->anchor)
+ return 1;
+
+ mpb = super->anchor;
+
+ if (strcmp(update, "uuid") == 0 && uuid_set && !info->update_private)
+ fprintf(stderr,
+ Name ": '--uuid' not supported for imsm metadata\n");
+ else if (strcmp(update, "uuid") == 0 && uuid_set && info->update_private) {
+ mpb->orig_family_num = *((__u32 *) info->update_private);
+ rv = 0;
+ } else if (strcmp(update, "uuid") == 0) {
+ __u32 *new_family = malloc(sizeof(*new_family));
+
+ /* update orig_family_number with the incoming random
+ * data, report the new effective uuid, and store the
+ * new orig_family_num for future updates.
+ */
+ if (new_family) {
+ memcpy(&mpb->orig_family_num, info->uuid, sizeof(__u32));
+ uuid_from_super_imsm(st, info->uuid);
+ *new_family = mpb->orig_family_num;
+ info->update_private = new_family;
+ rv = 0;
+ }
+ } else if (strcmp(update, "assemble") == 0)
+ rv = 0;
+ else
+ fprintf(stderr,
+ Name ": '--update=%s' not supported for imsm metadata\n",
+ update);
- /* IMSM has no concept of UUID or homehost */
+ /* successful update? recompute checksum */
+ if (rv == 0)
+ mpb->check_sum = __le32_to_cpu(__gen_imsm_checksum(mpb));
return rv;
}
return devsize - (MPB_SECTOR_CNT + IMSM_RESERVED_SECTORS);
}
+static void free_devlist(struct intel_super *super)
+{
+ struct intel_dev *dv;
+
+ while (super->devlist) {
+ dv = super->devlist->next;
+ free(super->devlist->dev);
+ free(super->devlist);
+ super->devlist = dv;
+ }
+}
+
+static void imsm_copy_dev(struct imsm_dev *dest, struct imsm_dev *src)
+{
+ memcpy(dest, src, sizeof_imsm_dev(src, 0));
+}
+
static int compare_super_imsm(struct supertype *st, struct supertype *tst)
{
/*
return 0;
}
- if (memcmp(first->mpb->sig, sec->mpb->sig, MAX_SIGNATURE_LENGTH) != 0)
- return 3;
- if (first->mpb->family_num != sec->mpb->family_num)
- return 3;
- if (first->mpb->mpb_size != sec->mpb->mpb_size)
- return 3;
- if (first->mpb->check_sum != sec->mpb->check_sum)
- return 3;
+ /* if an anchor does not have num_raid_devs set then it is a free
+ * floating spare
+ */
+ if (first->anchor->num_raid_devs > 0 &&
+ sec->anchor->num_raid_devs > 0) {
+ /* Determine if these disks might ever have been
+ * related. Further disambiguation can only take place
+ * in load_super_imsm_all
+ */
+ __u32 first_family = first->anchor->orig_family_num;
+ __u32 sec_family = sec->anchor->orig_family_num;
+
+ if (memcmp(first->anchor->sig, sec->anchor->sig,
+ MAX_SIGNATURE_LENGTH) != 0)
+ return 3;
+
+ if (first_family == 0)
+ first_family = first->anchor->family_num;
+ if (sec_family == 0)
+ sec_family = sec->anchor->family_num;
+
+ if (first_family != sec_family)
+ return 3;
+
+ }
+
+
+ /* if 'first' is a spare promote it to a populated mpb with sec's
+ * family number
+ */
+ if (first->anchor->num_raid_devs == 0 &&
+ sec->anchor->num_raid_devs > 0) {
+ int i;
+ struct intel_dev *dv;
+ struct imsm_dev *dev;
+
+ /* we need to copy raid device info from sec if an allocation
+ * fails here we don't associate the spare
+ */
+ for (i = 0; i < sec->anchor->num_raid_devs; i++) {
+ dv = malloc(sizeof(*dv));
+ if (!dv)
+ break;
+ dev = malloc(sizeof_imsm_dev(get_imsm_dev(sec, i), 1));
+ if (!dev) {
+ free(dv);
+ break;
+ }
+ dv->dev = dev;
+ dv->index = i;
+ dv->next = first->devlist;
+ first->devlist = dv;
+ }
+ if (i < sec->anchor->num_raid_devs) {
+ /* allocation failure */
+ free_devlist(first);
+ fprintf(stderr, "imsm: failed to associate spare\n");
+ return 3;
+ }
+ first->anchor->num_raid_devs = sec->anchor->num_raid_devs;
+ first->anchor->orig_family_num = sec->anchor->orig_family_num;
+ first->anchor->family_num = sec->anchor->family_num;
+ memcpy(first->anchor->sig, sec->anchor->sig, MAX_SIGNATURE_LENGTH);
+ for (i = 0; i < sec->anchor->num_raid_devs; i++)
+ imsm_copy_dev(get_imsm_dev(first, i), get_imsm_dev(sec, i));
+ }
return 0;
}
+static void fd2devname(int fd, char *name)
+{
+ struct stat st;
+ char path[256];
+ char dname[100];
+ char *nm;
+ int rv;
+
+ name[0] = '\0';
+ if (fstat(fd, &st) != 0)
+ return;
+ sprintf(path, "/sys/dev/block/%d:%d",
+ major(st.st_rdev), minor(st.st_rdev));
+
+ rv = readlink(path, dname, sizeof(dname));
+ if (rv <= 0)
+ return;
+
+ dname[rv] = '\0';
+ nm = strrchr(dname, '/');
+ nm++;
+ snprintf(name, MAX_RAID_SERIAL_LEN, "/dev/%s", nm);
+}
+
extern int scsi_get_serial(int fd, void *buf, size_t buf_len);
static int imsm_read_serial(int fd, char *devname,
__u8 serial[MAX_RAID_SERIAL_LEN])
{
unsigned char scsi_serial[255];
- int sg_fd;
int rv;
int rsp_len;
- int i, cnt;
+ int len;
+ char *dest;
+ char *src;
+ char *rsp_buf;
+ int i;
memset(scsi_serial, 0, sizeof(scsi_serial));
- sg_fd = sysfs_disk_to_sg(fd);
- if (sg_fd < 0) {
- if (devname)
- fprintf(stderr,
- Name ": Failed to open sg interface for %s: %s\n",
- devname, strerror(errno));
- return 1;
- }
+ rv = scsi_get_serial(fd, scsi_serial, sizeof(scsi_serial));
- rv = scsi_get_serial(sg_fd, scsi_serial, sizeof(scsi_serial));
- close(sg_fd);
+ if (rv && check_env("IMSM_DEVNAME_AS_SERIAL")) {
+ memset(serial, 0, MAX_RAID_SERIAL_LEN);
+ fd2devname(fd, (char *) serial);
+ return 0;
+ }
if (rv != 0) {
if (devname)
}
rsp_len = scsi_serial[3];
- for (i = 0, cnt = 0; i < rsp_len; i++) {
- if (!isspace(scsi_serial[4 + i]))
- serial[cnt++] = scsi_serial[4 + i];
- if (cnt == MAX_RAID_SERIAL_LEN)
- break;
+ if (!rsp_len) {
+ if (devname)
+ fprintf(stderr,
+ Name ": Failed to retrieve serial for %s\n",
+ devname);
+ return 2;
+ }
+ rsp_buf = (char *) &scsi_serial[4];
+
+ /* trim all whitespace and non-printable characters and convert
+ * ':' to ';'
+ */
+ for (i = 0, dest = rsp_buf; i < rsp_len; i++) {
+ src = &rsp_buf[i];
+ if (*src > 0x20) {
+ /* ':' is reserved for use in placeholder serial
+ * numbers for missing disks
+ */
+ if (*src == ':')
+ *dest++ = ';';
+ else
+ *dest++ = *src;
+ }
+ }
+ len = dest - rsp_buf;
+ dest = rsp_buf;
+
+ /* truncate leading characters */
+ if (len > MAX_RAID_SERIAL_LEN) {
+ dest += len - MAX_RAID_SERIAL_LEN;
+ len = MAX_RAID_SERIAL_LEN;
}
- serial[MAX_RAID_SERIAL_LEN - 1] = '\0';
+ memset(serial, 0, MAX_RAID_SERIAL_LEN);
+ memcpy(serial, dest, len);
return 0;
}
+static int serialcmp(__u8 *s1, __u8 *s2)
+{
+ return strncmp((char *) s1, (char *) s2, MAX_RAID_SERIAL_LEN);
+}
+
+static void serialcpy(__u8 *dest, __u8 *src)
+{
+ strncpy((char *) dest, (char *) src, MAX_RAID_SERIAL_LEN);
+}
+
+#ifndef MDASSEMBLE
+static struct dl *serial_to_dl(__u8 *serial, struct intel_super *super)
+{
+ struct dl *dl;
+
+ for (dl = super->disks; dl; dl = dl->next)
+ if (serialcmp(dl->serial, serial) == 0)
+ break;
+
+ return dl;
+}
+#endif
+
+static struct imsm_disk *
+__serial_to_disk(__u8 *serial, struct imsm_super *mpb, int *idx)
+{
+ int i;
+
+ for (i = 0; i < mpb->num_disks; i++) {
+ struct imsm_disk *disk = __get_imsm_disk(mpb, i);
+
+ if (serialcmp(disk->serial, serial) == 0) {
+ if (idx)
+ *idx = i;
+ return disk;
+ }
+ }
+
+ return NULL;
+}
+
static int
load_imsm_disk(int fd, struct intel_super *super, char *devname, int keep_fd)
{
- struct imsm_super *mpb = super->mpb;
+ struct imsm_disk *disk;
struct dl *dl;
struct stat stb;
- struct imsm_disk *disk;
int rv;
- int i;
+ char name[40];
+ __u8 serial[MAX_RAID_SERIAL_LEN];
+
+ rv = imsm_read_serial(fd, devname, serial);
+
+ if (rv != 0)
+ return 2;
- dl = malloc(sizeof(*dl));
+ dl = calloc(1, sizeof(*dl));
if (!dl) {
if (devname)
fprintf(stderr,
devname);
return 2;
}
- memset(dl, 0, sizeof(*dl));
fstat(fd, &stb);
dl->major = major(stb.st_rdev);
dl->minor = minor(stb.st_rdev);
dl->next = super->disks;
dl->fd = keep_fd ? fd : -1;
- dl->devname = devname ? strdup(devname) : NULL;
- dl->index = -1;
+ assert(super->disks == NULL);
super->disks = dl;
- rv = imsm_read_serial(fd, devname, dl->serial);
+ serialcpy(dl->serial, serial);
+ dl->index = -2;
+ dl->e = NULL;
+ fd2devname(fd, name);
+ if (devname)
+ dl->devname = strdup(devname);
+ else
+ dl->devname = strdup(name);
+
+ /* look up this disk's index in the current anchor */
+ disk = __serial_to_disk(dl->serial, super->anchor, &dl->index);
+ if (disk) {
+ dl->disk = *disk;
+ /* only set index on disks that are a member of a
+ * populated contianer, i.e. one with raid_devs
+ */
+ if (is_failed(&dl->disk))
+ dl->index = -2;
+ else if (is_spare(&dl->disk))
+ dl->index = -1;
+ }
- if (rv != 0)
- return 2;
+ return 0;
+}
- /* look up this disk's index */
- for (i = 0; i < mpb->num_disks; i++) {
- disk = get_imsm_disk(mpb, i);
+#ifndef MDASSEMBLE
+/* When migrating map0 contains the 'destination' state while map1
+ * contains the current state. When not migrating map0 contains the
+ * current state. This routine assumes that map[0].map_state is set to
+ * the current array state before being called.
+ *
+ * Migration is indicated by one of the following states
+ * 1/ Idle (migr_state=0 map0state=normal||unitialized||degraded||failed)
+ * 2/ Initialize (migr_state=1 migr_type=MIGR_INIT map0state=normal
+ * map1state=unitialized)
+ * 3/ Repair (Resync) (migr_state=1 migr_type=MIGR_REPAIR map0state=normal
+ * map1state=normal)
+ * 4/ Rebuild (migr_state=1 migr_type=MIGR_REBUILD map0state=normal
+ * map1state=degraded)
+ */
+static void migrate(struct imsm_dev *dev, __u8 to_state, int migr_type)
+{
+ struct imsm_map *dest;
+ struct imsm_map *src = get_imsm_map(dev, 0);
+
+ dev->vol.migr_state = 1;
+ set_migr_type(dev, migr_type);
+ dev->vol.curr_migr_unit = 0;
+ dest = get_imsm_map(dev, 1);
+
+ /* duplicate and then set the target end state in map[0] */
+ memcpy(dest, src, sizeof_imsm_map(src));
+ if (migr_type == MIGR_REBUILD) {
+ __u32 ord;
+ int i;
- if (memcmp(disk->serial, dl->serial, MAX_RAID_SERIAL_LEN) == 0)
- break;
+ for (i = 0; i < src->num_members; i++) {
+ ord = __le32_to_cpu(src->disk_ord_tbl[i]);
+ set_imsm_ord_tbl_ent(src, i, ord_to_idx(ord));
+ }
}
- if (i > mpb->num_disks)
- return 2;
+ src->map_state = to_state;
+}
- dl->index = i;
+static void end_migration(struct imsm_dev *dev, __u8 map_state)
+{
+ struct imsm_map *map = get_imsm_map(dev, 0);
+ struct imsm_map *prev = get_imsm_map(dev, dev->vol.migr_state);
+ int i;
- return 0;
+ /* merge any IMSM_ORD_REBUILD bits that were not successfully
+ * completed in the last migration.
+ *
+ * FIXME add support for online capacity expansion and
+ * raid-level-migration
+ */
+ for (i = 0; i < prev->num_members; i++)
+ map->disk_ord_tbl[i] |= prev->disk_ord_tbl[i];
+
+ dev->vol.migr_state = 0;
+ dev->vol.curr_migr_unit = 0;
+ map->map_state = map_state;
}
+#endif
-/* load_imsm_mpb - read matrix metadata
- * allocates super->mpb to be freed by free_super
- */
-static int load_imsm_mpb(int fd, struct intel_super *super, char *devname)
+static int parse_raid_devices(struct intel_super *super)
{
- unsigned long long dsize;
- size_t len, mpb_size;
- unsigned long long sectors;
- struct stat;
- struct imsm_super *anchor;
- __u32 check_sum;
-
- get_dev_size(fd, NULL, &dsize);
+ int i;
+ struct imsm_dev *dev_new;
+ size_t len, len_migr;
+ size_t space_needed = 0;
+ struct imsm_super *mpb = super->anchor;
+
+ for (i = 0; i < super->anchor->num_raid_devs; i++) {
+ struct imsm_dev *dev_iter = __get_imsm_dev(super->anchor, i);
+ struct intel_dev *dv;
+
+ len = sizeof_imsm_dev(dev_iter, 0);
+ len_migr = sizeof_imsm_dev(dev_iter, 1);
+ if (len_migr > len)
+ space_needed += len_migr - len;
+
+ dv = malloc(sizeof(*dv));
+ if (!dv)
+ return 1;
+ dev_new = malloc(len_migr);
+ if (!dev_new) {
+ free(dv);
+ return 1;
+ }
+ imsm_copy_dev(dev_new, dev_iter);
+ dv->dev = dev_new;
+ dv->index = i;
+ dv->next = super->devlist;
+ super->devlist = dv;
+ }
+
+ /* ensure that super->buf is large enough when all raid devices
+ * are migrating
+ */
+ if (__le32_to_cpu(mpb->mpb_size) + space_needed > super->len) {
+ void *buf;
+
+ len = ROUND_UP(__le32_to_cpu(mpb->mpb_size) + space_needed, 512);
+ if (posix_memalign(&buf, 512, len) != 0)
+ return 1;
+
+ memcpy(buf, super->buf, super->len);
+ memset(buf + super->len, 0, len - super->len);
+ free(super->buf);
+ super->buf = buf;
+ super->len = len;
+ }
+
+ return 0;
+}
+
+/* retrieve a pointer to the bbm log which starts after all raid devices */
+struct bbm_log *__get_imsm_bbm_log(struct imsm_super *mpb)
+{
+ void *ptr = NULL;
+
+ if (__le32_to_cpu(mpb->bbm_log_size)) {
+ ptr = mpb;
+ ptr += mpb->mpb_size - __le32_to_cpu(mpb->bbm_log_size);
+ }
+
+ return ptr;
+}
+
+static void __free_imsm(struct intel_super *super, int free_disks);
+
+/* load_imsm_mpb - read matrix metadata
+ * allocates super->mpb to be freed by free_super
+ */
+static int load_imsm_mpb(int fd, struct intel_super *super, char *devname)
+{
+ unsigned long long dsize;
+ unsigned long long sectors;
+ struct stat;
+ struct imsm_super *anchor;
+ __u32 check_sum;
+
+ get_dev_size(fd, NULL, &dsize);
if (lseek64(fd, dsize - (512 * 2), SEEK_SET) < 0) {
if (devname)
return 1;
}
- len = 512;
- if (posix_memalign((void**)&anchor, 512, len) != 0) {
+ if (posix_memalign((void**)&anchor, 512, 512) != 0) {
if (devname)
fprintf(stderr,
Name ": Failed to allocate imsm anchor buffer"
" on %s\n", devname);
return 1;
}
- if (read(fd, anchor, len) != len) {
+ if (read(fd, anchor, 512) != 512) {
if (devname)
fprintf(stderr,
Name ": Cannot read anchor block on %s: %s\n",
return 2;
}
- mpb_size = __le32_to_cpu(anchor->mpb_size);
- mpb_size = ROUND_UP(mpb_size, 512);
- if (posix_memalign((void**)&super->mpb, 512, mpb_size) != 0) {
+ __free_imsm(super, 0);
+ super->len = ROUND_UP(anchor->mpb_size, 512);
+ if (posix_memalign(&super->buf, 512, super->len) != 0) {
if (devname)
fprintf(stderr,
Name ": unable to allocate %zu byte mpb buffer\n",
- mpb_size);
+ super->len);
free(anchor);
return 2;
}
- memcpy(super->buf, anchor, len);
+ memcpy(super->buf, anchor, 512);
sectors = mpb_sectors(anchor) - 1;
free(anchor);
- if (!sectors)
- return load_imsm_disk(fd, super, devname, 0);
+ if (!sectors) {
+ check_sum = __gen_imsm_checksum(super->anchor);
+ if (check_sum != __le32_to_cpu(super->anchor->check_sum)) {
+ if (devname)
+ fprintf(stderr,
+ Name ": IMSM checksum %x != %x on %s\n",
+ check_sum,
+ __le32_to_cpu(super->anchor->check_sum),
+ devname);
+ return 2;
+ }
+
+ return 0;
+ }
/* read the extended mpb */
if (lseek64(fd, dsize - (512 * (2 + sectors)), SEEK_SET) < 0) {
return 1;
}
- len = mpb_size - 512;
- if (read(fd, super->buf + 512, len) != len) {
+ if (read(fd, super->buf + 512, super->len - 512) != super->len - 512) {
if (devname)
fprintf(stderr,
Name ": Cannot read extended mpb on %s: %s\n",
return 2;
}
- check_sum = gen_imsm_checksum(super->mpb);
- if (check_sum != __le32_to_cpu(super->mpb->check_sum)) {
+ check_sum = __gen_imsm_checksum(super->anchor);
+ if (check_sum != __le32_to_cpu(super->anchor->check_sum)) {
if (devname)
fprintf(stderr,
Name ": IMSM checksum %x != %x on %s\n",
- check_sum, __le32_to_cpu(super->mpb->check_sum),
+ check_sum, __le32_to_cpu(super->anchor->check_sum),
devname);
- return 2;
+ return 3;
}
- return load_imsm_disk(fd, super, devname, 0);
+ /* FIXME the BBM log is disk specific so we cannot use this global
+ * buffer for all disks. Ok for now since we only look at the global
+ * bbm_log_size parameter to gate assembly
+ */
+ super->bbm_log = __get_imsm_bbm_log(super->anchor);
+
+ return 0;
+}
+
+static int
+load_and_parse_mpb(int fd, struct intel_super *super, char *devname, int keep_fd)
+{
+ int err;
+
+ err = load_imsm_mpb(fd, super, devname);
+ if (err)
+ return err;
+ err = load_imsm_disk(fd, super, devname, keep_fd);
+ if (err)
+ return err;
+ err = parse_raid_devices(super);
+
+ return err;
}
+static void __free_imsm_disk(struct dl *d)
+{
+ if (d->fd >= 0)
+ close(d->fd);
+ if (d->devname)
+ free(d->devname);
+ if (d->e)
+ free(d->e);
+ free(d);
+
+}
static void free_imsm_disks(struct intel_super *super)
{
- while (super->disks) {
- struct dl *d = super->disks;
+ struct dl *d;
+ while (super->disks) {
+ d = super->disks;
super->disks = d->next;
- if (d->fd >= 0)
- close(d->fd);
- if (d->devname)
- free(d->devname);
- free(d);
+ __free_imsm_disk(d);
+ }
+ while (super->missing) {
+ d = super->missing;
+ super->missing = d->next;
+ __free_imsm_disk(d);
+ }
+
+}
+
+/* free all the pieces hanging off of a super pointer */
+static void __free_imsm(struct intel_super *super, int free_disks)
+{
+ if (super->buf) {
+ free(super->buf);
+ super->buf = NULL;
+ }
+ if (free_disks)
+ free_imsm_disks(super);
+ free_devlist(super);
+ if (super->hba) {
+ free((void *) super->hba);
+ super->hba = NULL;
}
}
static void free_imsm(struct intel_super *super)
{
- if (super->mpb)
- free(super->mpb);
- free_imsm_disks(super);
+ __free_imsm(super, 1);
free(super);
}
-
static void free_super_imsm(struct supertype *st)
{
struct intel_super *super = st->sb;
memset(super, 0, sizeof(*super));
super->creating_imsm = creating_imsm;
super->current_vol = -1;
+ super->create_offset = ~((__u32 ) 0);
+ if (!check_env("IMSM_NO_PLATFORM"))
+ super->orom = find_imsm_orom();
+ if (super->orom && !check_env("IMSM_TEST_OROM")) {
+ struct sys_dev *list, *ent;
+
+ /* find the first intel ahci controller */
+ list = find_driver_devices("pci", "ahci");
+ for (ent = list; ent; ent = ent->next)
+ if (devpath_to_vendor(ent->path) == 0x8086)
+ break;
+ if (ent) {
+ super->hba = ent->path;
+ ent->path = NULL;
+ }
+ free_sys_dev(&list);
+ }
}
return super;
}
#ifndef MDASSEMBLE
+/* find_missing - helper routine for load_super_imsm_all that identifies
+ * disks that have disappeared from the system. This routine relies on
+ * the mpb being uptodate, which it is at load time.
+ */
+static int find_missing(struct intel_super *super)
+{
+ int i;
+ struct imsm_super *mpb = super->anchor;
+ struct dl *dl;
+ struct imsm_disk *disk;
+
+ for (i = 0; i < mpb->num_disks; i++) {
+ disk = __get_imsm_disk(mpb, i);
+ dl = serial_to_dl(disk->serial, super);
+ if (dl)
+ continue;
+
+ dl = malloc(sizeof(*dl));
+ if (!dl)
+ return 1;
+ dl->major = 0;
+ dl->minor = 0;
+ dl->fd = -1;
+ dl->devname = strdup("missing");
+ dl->index = i;
+ serialcpy(dl->serial, disk->serial);
+ dl->disk = *disk;
+ dl->e = NULL;
+ dl->next = super->missing;
+ super->missing = dl;
+ }
+
+ return 0;
+}
+
+static struct intel_disk *disk_list_get(__u8 *serial, struct intel_disk *disk_list)
+{
+ struct intel_disk *idisk = disk_list;
+
+ while (idisk) {
+ if (serialcmp(idisk->disk.serial, serial) == 0)
+ break;
+ idisk = idisk->next;
+ }
+
+ return idisk;
+}
+
+static int __prep_thunderdome(struct intel_super **table, int tbl_size,
+ struct intel_super *super,
+ struct intel_disk **disk_list)
+{
+ struct imsm_disk *d = &super->disks->disk;
+ struct imsm_super *mpb = super->anchor;
+ int i, j;
+
+ for (i = 0; i < tbl_size; i++) {
+ struct imsm_super *tbl_mpb = table[i]->anchor;
+ struct imsm_disk *tbl_d = &table[i]->disks->disk;
+
+ if (tbl_mpb->family_num == mpb->family_num) {
+ if (tbl_mpb->check_sum == mpb->check_sum) {
+ dprintf("%s: mpb from %d:%d matches %d:%d\n",
+ __func__, super->disks->major,
+ super->disks->minor,
+ table[i]->disks->major,
+ table[i]->disks->minor);
+ break;
+ }
+
+ if (((is_configured(d) && !is_configured(tbl_d)) ||
+ is_configured(d) == is_configured(tbl_d)) &&
+ tbl_mpb->generation_num < mpb->generation_num) {
+ /* current version of the mpb is a
+ * better candidate than the one in
+ * super_table, but copy over "cross
+ * generational" status
+ */
+ struct intel_disk *idisk;
+
+ dprintf("%s: mpb from %d:%d replaces %d:%d\n",
+ __func__, super->disks->major,
+ super->disks->minor,
+ table[i]->disks->major,
+ table[i]->disks->minor);
+
+ idisk = disk_list_get(tbl_d->serial, *disk_list);
+ if (idisk && is_failed(&idisk->disk))
+ tbl_d->status |= FAILED_DISK;
+ break;
+ } else {
+ struct intel_disk *idisk;
+ struct imsm_disk *disk;
+
+ /* tbl_mpb is more up to date, but copy
+ * over cross generational status before
+ * returning
+ */
+ disk = __serial_to_disk(d->serial, mpb, NULL);
+ if (disk && is_failed(disk))
+ d->status |= FAILED_DISK;
+
+ idisk = disk_list_get(d->serial, *disk_list);
+ if (idisk) {
+ idisk->owner = i;
+ if (disk && is_configured(disk))
+ idisk->disk.status |= CONFIGURED_DISK;
+ }
+
+ dprintf("%s: mpb from %d:%d prefer %d:%d\n",
+ __func__, super->disks->major,
+ super->disks->minor,
+ table[i]->disks->major,
+ table[i]->disks->minor);
+
+ return tbl_size;
+ }
+ }
+ }
+
+ if (i >= tbl_size)
+ table[tbl_size++] = super;
+ else
+ table[i] = super;
+
+ /* update/extend the merged list of imsm_disk records */
+ for (j = 0; j < mpb->num_disks; j++) {
+ struct imsm_disk *disk = __get_imsm_disk(mpb, j);
+ struct intel_disk *idisk;
+
+ idisk = disk_list_get(disk->serial, *disk_list);
+ if (idisk) {
+ idisk->disk.status |= disk->status;
+ if (is_configured(&idisk->disk) ||
+ is_failed(&idisk->disk))
+ idisk->disk.status &= ~(SPARE_DISK);
+ } else {
+ idisk = calloc(1, sizeof(*idisk));
+ if (!idisk)
+ return -1;
+ idisk->owner = IMSM_UNKNOWN_OWNER;
+ idisk->disk = *disk;
+ idisk->next = *disk_list;
+ *disk_list = idisk;
+ }
+
+ if (serialcmp(idisk->disk.serial, d->serial) == 0)
+ idisk->owner = i;
+ }
+
+ return tbl_size;
+}
+
+static struct intel_super *
+validate_members(struct intel_super *super, struct intel_disk *disk_list,
+ const int owner)
+{
+ struct imsm_super *mpb = super->anchor;
+ int ok_count = 0;
+ int i;
+
+ for (i = 0; i < mpb->num_disks; i++) {
+ struct imsm_disk *disk = __get_imsm_disk(mpb, i);
+ struct intel_disk *idisk;
+
+ idisk = disk_list_get(disk->serial, disk_list);
+ if (idisk) {
+ if (idisk->owner == owner ||
+ idisk->owner == IMSM_UNKNOWN_OWNER)
+ ok_count++;
+ else
+ dprintf("%s: '%.16s' owner %d != %d\n",
+ __func__, disk->serial, idisk->owner,
+ owner);
+ } else {
+ dprintf("%s: unknown disk %x [%d]: %.16s\n",
+ __func__, __le32_to_cpu(mpb->family_num), i,
+ disk->serial);
+ break;
+ }
+ }
+
+ if (ok_count == mpb->num_disks)
+ return super;
+ return NULL;
+}
+
+static void show_conflicts(__u32 family_num, struct intel_super *super_list)
+{
+ struct intel_super *s;
+
+ for (s = super_list; s; s = s->next) {
+ if (family_num != s->anchor->family_num)
+ continue;
+ fprintf(stderr, "Conflict, offlining family %#x on '%s'\n",
+ __le32_to_cpu(family_num), s->disks->devname);
+ }
+}
+
+static struct intel_super *
+imsm_thunderdome(struct intel_super **super_list, int len)
+{
+ struct intel_super *super_table[len];
+ struct intel_disk *disk_list = NULL;
+ struct intel_super *champion, *spare;
+ struct intel_super *s, **del;
+ int tbl_size = 0;
+ int conflict;
+ int i;
+
+ memset(super_table, 0, sizeof(super_table));
+ for (s = *super_list; s; s = s->next)
+ tbl_size = __prep_thunderdome(super_table, tbl_size, s, &disk_list);
+
+ for (i = 0; i < tbl_size; i++) {
+ struct imsm_disk *d;
+ struct intel_disk *idisk;
+ struct imsm_super *mpb = super_table[i]->anchor;
+
+ s = super_table[i];
+ d = &s->disks->disk;
+
+ /* 'd' must appear in merged disk list for its
+ * configuration to be valid
+ */
+ idisk = disk_list_get(d->serial, disk_list);
+ if (idisk && idisk->owner == i)
+ s = validate_members(s, disk_list, i);
+ else
+ s = NULL;
+
+ if (!s)
+ dprintf("%s: marking family: %#x from %d:%d offline\n",
+ __func__, mpb->family_num,
+ super_table[i]->disks->major,
+ super_table[i]->disks->minor);
+ super_table[i] = s;
+ }
+
+ /* This is where the mdadm implementation differs from the Windows
+ * driver which has no strict concept of a container. We can only
+ * assemble one family from a container, so when returning a prodigal
+ * array member to this system the code will not be able to disambiguate
+ * the container contents that should be assembled ("foreign" versus
+ * "local"). It requires user intervention to set the orig_family_num
+ * to a new value to establish a new container. The Windows driver in
+ * this situation fixes up the volume name in place and manages the
+ * foreign array as an independent entity.
+ */
+ s = NULL;
+ spare = NULL;
+ conflict = 0;
+ for (i = 0; i < tbl_size; i++) {
+ struct intel_super *tbl_ent = super_table[i];
+ int is_spare = 0;
+
+ if (!tbl_ent)
+ continue;
+
+ if (tbl_ent->anchor->num_raid_devs == 0) {
+ spare = tbl_ent;
+ is_spare = 1;
+ }
+
+ if (s && !is_spare) {
+ show_conflicts(tbl_ent->anchor->family_num, *super_list);
+ conflict++;
+ } else if (!s && !is_spare)
+ s = tbl_ent;
+ }
+
+ if (!s)
+ s = spare;
+ if (!s) {
+ champion = NULL;
+ goto out;
+ }
+ champion = s;
+
+ if (conflict)
+ fprintf(stderr, "Chose family %#x on '%s', "
+ "assemble conflicts to new container with '--update=uuid'\n",
+ __le32_to_cpu(s->anchor->family_num), s->disks->devname);
+
+ /* collect all dl's onto 'champion', and update them to
+ * champion's version of the status
+ */
+ for (s = *super_list; s; s = s->next) {
+ struct imsm_super *mpb = champion->anchor;
+ struct dl *dl = s->disks;
+
+ if (s == champion)
+ continue;
+
+ for (i = 0; i < mpb->num_disks; i++) {
+ struct imsm_disk *disk;
+
+ disk = __serial_to_disk(dl->serial, mpb, &dl->index);
+ if (disk) {
+ dl->disk = *disk;
+ /* only set index on disks that are a member of
+ * a populated contianer, i.e. one with
+ * raid_devs
+ */
+ if (is_failed(&dl->disk))
+ dl->index = -2;
+ else if (is_spare(&dl->disk))
+ dl->index = -1;
+ break;
+ }
+ }
+
+ if (i >= mpb->num_disks) {
+ struct intel_disk *idisk;
+
+ idisk = disk_list_get(dl->serial, disk_list);
+ if (idisk && is_spare(&idisk->disk) &&
+ !is_failed(&idisk->disk) && !is_configured(&idisk->disk))
+ dl->index = -1;
+ else {
+ dl->index = -2;
+ continue;
+ }
+ }
+
+ dl->next = champion->disks;
+ champion->disks = dl;
+ s->disks = NULL;
+ }
+
+ /* delete 'champion' from super_list */
+ for (del = super_list; *del; ) {
+ if (*del == champion) {
+ *del = (*del)->next;
+ break;
+ } else
+ del = &(*del)->next;
+ }
+ champion->next = NULL;
+
+ out:
+ while (disk_list) {
+ struct intel_disk *idisk = disk_list;
+
+ disk_list = disk_list->next;
+ free(idisk);
+ }
+
+ return champion;
+}
+
static int load_super_imsm_all(struct supertype *st, int fd, void **sbp,
char *devname, int keep_fd)
{
struct mdinfo *sra;
- struct intel_super *super;
- struct mdinfo *sd, *best = NULL;
- __u32 bestgen = 0;
- __u32 gen;
- char nm[20];
- int dfd;
- int rv;
+ struct intel_super *super_list = NULL;
+ struct intel_super *super = NULL;
+ int devnum = fd2devnum(fd);
+ struct mdinfo *sd;
+ int retry;
+ int err = 0;
+ int i;
+ enum sysfs_read_flags flags;
- /* check if this disk is a member of an active array */
- sra = sysfs_read(fd, 0, GET_LEVEL|GET_VERSION|GET_DEVS|GET_STATE);
+ flags = GET_LEVEL|GET_VERSION|GET_DEVS|GET_STATE;
+ if (mdmon_running(devnum))
+ flags |= SKIP_GONE_DEVS;
+
+ /* check if 'fd' an opened container */
+ sra = sysfs_read(fd, 0, flags);
if (!sra)
return 1;
strcmp(sra->text_version, "imsm") != 0)
return 1;
- super = alloc_super(0);
- if (!super)
- return 1;
+ /* load all mpbs */
+ for (sd = sra->devs, i = 0; sd; sd = sd->next, i++) {
+ struct intel_super *s = alloc_super(0);
+ char nm[20];
+ int dfd;
- /* find the most up to date disk in this array */
- for (sd = sra->devs; sd; sd = sd->next) {
+ err = 1;
+ if (!s)
+ goto error;
+ s->next = super_list;
+ super_list = s;
+
+ err = 2;
sprintf(nm, "%d:%d", sd->disk.major, sd->disk.minor);
dfd = dev_open(nm, keep_fd ? O_RDWR : O_RDONLY);
- if (!dfd) {
- free_imsm(super);
- return 2;
- }
- rv = load_imsm_mpb(dfd, super, NULL);
+ if (dfd < 0)
+ goto error;
+
+ err = load_and_parse_mpb(dfd, s, NULL, keep_fd);
+
+ /* retry the load if we might have raced against mdmon */
+ if (err == 3 && mdmon_running(devnum))
+ for (retry = 0; retry < 3; retry++) {
+ usleep(3000);
+ err = load_and_parse_mpb(dfd, s, NULL, keep_fd);
+ if (err != 3)
+ break;
+ }
if (!keep_fd)
close(dfd);
- if (rv == 0) {
- gen = __le32_to_cpu(super->mpb->generation_num);
- if (!best || gen > bestgen) {
- bestgen = gen;
- best = sd;
- }
- } else {
- free_imsm(super);
- return 2;
- }
+ if (err)
+ goto error;
}
- if (!best) {
- free_imsm(super);
- return 1;
+ /* all mpbs enter, maybe one leaves */
+ super = imsm_thunderdome(&super_list, i);
+ if (!super) {
+ err = 1;
+ goto error;
}
- /* load the most up to date anchor */
- sprintf(nm, "%d:%d", best->disk.major, best->disk.minor);
- dfd = dev_open(nm, O_RDONLY);
- if (!dfd) {
- free_imsm(super);
- return 1;
- }
- rv = load_imsm_mpb(dfd, super, NULL);
- close(dfd);
- if (rv != 0) {
+ if (find_missing(super) != 0) {
free_imsm(super);
- return 2;
+ err = 2;
+ goto error;
}
- /* reset the disk list */
- free_imsm_disks(super);
-
- /* populate disk list */
- for (sd = sra->devs ; sd ; sd = sd->next) {
- sprintf(nm, "%d:%d", sd->disk.major, sd->disk.minor);
- dfd = dev_open(nm, keep_fd? O_RDWR : O_RDONLY);
- if (!dfd) {
+ if (st->subarray[0]) {
+ if (atoi(st->subarray) <= super->anchor->num_raid_devs)
+ super->current_vol = atoi(st->subarray);
+ else {
free_imsm(super);
- return 2;
+ err = 1;
+ goto error;
}
- load_imsm_disk(dfd, super, NULL, keep_fd);
- if (!keep_fd)
- close(dfd);
}
+ err = 0;
- if (st->subarray[0]) {
- if (atoi(st->subarray) <= super->mpb->num_raid_devs)
- super->current_vol = atoi(st->subarray);
- else
- return 1;
+ error:
+ while (super_list) {
+ struct intel_super *s = super_list;
+
+ super_list = super_list->next;
+ free_imsm(s);
}
+ if (err)
+ return err;
+
*sbp = super;
- if (st->ss == NULL) {
+ st->container_dev = devnum;
+ if (err == 0 && st->ss == NULL) {
st->ss = &super_imsm;
st->minor_version = 0;
st->max_devs = IMSM_MAX_DEVICES;
- st->container_dev = fd2devnum(fd);
}
+ st->loaded_container = 1;
return 0;
}
if (load_super_imsm_all(st, fd, &st->sb, devname, 1) == 0)
return 0;
#endif
- if (st->subarray[0])
- return 1; /* FIXME */
+
+ free_super_imsm(st);
super = alloc_super(0);
if (!super) {
return 1;
}
- rv = load_imsm_mpb(fd, super, devname);
+ rv = load_and_parse_mpb(fd, super, devname, 0);
if (rv) {
if (devname)
return rv;
}
+ if (st->subarray[0]) {
+ if (atoi(st->subarray) <= super->anchor->num_raid_devs)
+ super->current_vol = atoi(st->subarray);
+ else {
+ free_imsm(super);
+ return 1;
+ }
+ }
+
st->sb = super;
if (st->ss == NULL) {
st->ss = &super_imsm;
st->minor_version = 0;
st->max_devs = IMSM_MAX_DEVICES;
}
+ st->loaded_container = 0;
return 0;
}
+static __u16 info_to_blocks_per_strip(mdu_array_info_t *info)
+{
+ if (info->level == 1)
+ return 128;
+ return info->chunk_size >> 9;
+}
+
+static __u32 info_to_num_data_stripes(mdu_array_info_t *info, int num_domains)
+{
+ __u32 num_stripes;
+
+ num_stripes = (info->size * 2) / info_to_blocks_per_strip(info);
+ num_stripes /= num_domains;
+
+ return num_stripes;
+}
+
+static __u32 info_to_blocks_per_member(mdu_array_info_t *info)
+{
+ if (info->level == 1)
+ return info->size * 2;
+ else
+ return (info->size * 2) & ~(info_to_blocks_per_strip(info) - 1);
+}
+
+static void imsm_update_version_info(struct intel_super *super)
+{
+ /* update the version and attributes */
+ struct imsm_super *mpb = super->anchor;
+ char *version;
+ struct imsm_dev *dev;
+ struct imsm_map *map;
+ int i;
+
+ for (i = 0; i < mpb->num_raid_devs; i++) {
+ dev = get_imsm_dev(super, i);
+ map = get_imsm_map(dev, 0);
+ if (__le32_to_cpu(dev->size_high) > 0)
+ mpb->attributes |= MPB_ATTRIB_2TB;
+
+ /* FIXME detect when an array spans a port multiplier */
+ #if 0
+ mpb->attributes |= MPB_ATTRIB_PM;
+ #endif
+
+ if (mpb->num_raid_devs > 1 ||
+ mpb->attributes != MPB_ATTRIB_CHECKSUM_VERIFY) {
+ version = MPB_VERSION_ATTRIBS;
+ switch (get_imsm_raid_level(map)) {
+ case 0: mpb->attributes |= MPB_ATTRIB_RAID0; break;
+ case 1: mpb->attributes |= MPB_ATTRIB_RAID1; break;
+ case 10: mpb->attributes |= MPB_ATTRIB_RAID10; break;
+ case 5: mpb->attributes |= MPB_ATTRIB_RAID5; break;
+ }
+ } else {
+ if (map->num_members >= 5)
+ version = MPB_VERSION_5OR6_DISK_ARRAY;
+ else if (dev->status == DEV_CLONE_N_GO)
+ version = MPB_VERSION_CNG;
+ else if (get_imsm_raid_level(map) == 5)
+ version = MPB_VERSION_RAID5;
+ else if (map->num_members >= 3)
+ version = MPB_VERSION_3OR4_DISK_ARRAY;
+ else if (get_imsm_raid_level(map) == 1)
+ version = MPB_VERSION_RAID1;
+ else
+ version = MPB_VERSION_RAID0;
+ }
+ strcpy(((char *) mpb->sig) + strlen(MPB_SIGNATURE), version);
+ }
+}
+
static int init_super_imsm_volume(struct supertype *st, mdu_array_info_t *info,
unsigned long long size, char *name,
char *homehost, int *uuid)
* so st->sb is already set.
*/
struct intel_super *super = st->sb;
- struct imsm_super *mpb = super->mpb;
+ struct imsm_super *mpb = super->anchor;
+ struct intel_dev *dv;
struct imsm_dev *dev;
struct imsm_vol *vol;
struct imsm_map *map;
int idx = mpb->num_raid_devs;
int i;
unsigned long long array_blocks;
- unsigned long long sz;
- __u32 offset = 0;
size_t size_old, size_new;
+ __u32 num_data_stripes;
- if (mpb->num_raid_devs >= 2) {
+ if (super->orom && mpb->num_raid_devs >= super->orom->vpa) {
fprintf(stderr, Name": This imsm-container already has the "
- "maximum of 2 volumes\n");
+ "maximum of %d volumes\n", super->orom->vpa);
return 0;
}
memcpy(mpb_new, mpb, size_old);
free(mpb);
mpb = mpb_new;
- super->mpb = mpb_new;
+ super->anchor = mpb_new;
mpb->mpb_size = __cpu_to_le32(size_new);
memset(mpb_new + size_old, 0, size_round - size_old);
}
super->current_vol = idx;
+ /* when creating the first raid device in this container set num_disks
+ * to zero, i.e. delete this spare and add raid member devices in
+ * add_to_super_imsm_volume()
+ */
+ if (super->current_vol == 0)
+ mpb->num_disks = 0;
+
+ for (i = 0; i < super->current_vol; i++) {
+ dev = get_imsm_dev(super, i);
+ if (strncmp((char *) dev->volume, name,
+ MAX_RAID_SERIAL_LEN) == 0) {
+ fprintf(stderr, Name": '%s' is already defined for this container\n",
+ name);
+ return 0;
+ }
+ }
+
sprintf(st->subarray, "%d", idx);
- mpb->num_raid_devs++;
- dev = get_imsm_dev(mpb, idx);
+ dv = malloc(sizeof(*dv));
+ if (!dv) {
+ fprintf(stderr, Name ": failed to allocate device list entry\n");
+ return 0;
+ }
+ dev = malloc(sizeof(*dev) + sizeof(__u32) * (info->raid_disks - 1));
+ if (!dev) {
+ free(dv);
+ fprintf(stderr, Name": could not allocate raid device\n");
+ return 0;
+ }
strncpy((char *) dev->volume, name, MAX_RAID_SERIAL_LEN);
- array_blocks = calc_array_size(info->level, info->raid_disks,
- info->layout, info->chunk_size,
- info->size*2);
+ if (info->level == 1)
+ array_blocks = info_to_blocks_per_member(info);
+ else
+ array_blocks = calc_array_size(info->level, info->raid_disks,
+ info->layout, info->chunk_size,
+ info->size*2);
+ /* round array size down to closest MB */
+ array_blocks = (array_blocks >> SECT_PER_MB_SHIFT) << SECT_PER_MB_SHIFT;
+
dev->size_low = __cpu_to_le32((__u32) array_blocks);
dev->size_high = __cpu_to_le32((__u32) (array_blocks >> 32));
dev->status = __cpu_to_le32(0);
dev->reserved_blocks = __cpu_to_le32(0);
vol = &dev->vol;
vol->migr_state = 0;
- vol->migr_type = 0;
+ set_migr_type(dev, MIGR_INIT);
vol->dirty = 0;
- for (i = 0; i < idx; i++) {
- struct imsm_dev *prev = get_imsm_dev(mpb, i);
- struct imsm_map *pmap = &prev->vol.map[0];
-
- offset += __le32_to_cpu(pmap->blocks_per_member);
- offset += IMSM_RESERVED_SECTORS;
- }
- map = &vol->map[0];
- map->pba_of_lba0 = __cpu_to_le32(offset);
- sz = info->size * 2;
- map->blocks_per_member = __cpu_to_le32(sz);
- map->blocks_per_strip = __cpu_to_le16(info->chunk_size >> 9);
- map->num_data_stripes = __cpu_to_le32(sz / (info->chunk_size >> 9));
+ vol->curr_migr_unit = 0;
+ map = get_imsm_map(dev, 0);
+ map->pba_of_lba0 = __cpu_to_le32(super->create_offset);
+ map->blocks_per_member = __cpu_to_le32(info_to_blocks_per_member(info));
+ map->blocks_per_strip = __cpu_to_le16(info_to_blocks_per_strip(info));
+ map->failed_disk_num = ~0;
map->map_state = info->level ? IMSM_T_STATE_UNINITIALIZED :
IMSM_T_STATE_NORMAL;
- if (info->level == 10)
+ map->ddf = 1;
+
+ if (info->level == 1 && info->raid_disks > 2) {
+ fprintf(stderr, Name": imsm does not support more than 2 disks"
+ "in a raid1 volume\n");
+ return 0;
+ }
+
+ map->raid_level = info->level;
+ if (info->level == 10) {
map->raid_level = 1;
+ map->num_domains = info->raid_disks / 2;
+ } else if (info->level == 1)
+ map->num_domains = info->raid_disks;
else
- map->raid_level = info->level;
+ map->num_domains = 1;
+
+ num_data_stripes = info_to_num_data_stripes(info, map->num_domains);
+ map->num_data_stripes = __cpu_to_le32(num_data_stripes);
+
map->num_members = info->raid_disks;
for (i = 0; i < map->num_members; i++) {
/* initialized in add_to_super */
- map->disk_ord_tbl[i] = __cpu_to_le32(0);
+ set_imsm_ord_tbl_ent(map, i, 0);
}
+ mpb->num_raid_devs++;
+
+ dv->dev = dev;
+ dv->index = super->current_vol;
+ dv->next = super->devlist;
+ super->devlist = dv;
+
+ imsm_update_version_info(super);
return 1;
}
struct intel_super *super;
struct imsm_super *mpb;
size_t mpb_size;
+ char *version;
- if (!info) {
- st->sb = NULL;
- return 0;
- }
if (st->sb)
- return init_super_imsm_volume(st, info, size, name, homehost,
- uuid);
+ return init_super_imsm_volume(st, info, size, name, homehost, uuid);
+
+ if (info)
+ mpb_size = disks_to_mpb_size(info->nr_disks);
+ else
+ mpb_size = 512;
super = alloc_super(1);
- if (!super)
- return 0;
- mpb_size = disks_to_mpb_size(info->nr_disks);
- if (posix_memalign((void**)&mpb, 512, mpb_size) != 0) {
+ if (super && posix_memalign(&super->buf, 512, mpb_size) != 0) {
free(super);
+ super = NULL;
+ }
+ if (!super) {
+ fprintf(stderr, Name
+ ": %s could not allocate superblock\n", __func__);
return 0;
}
- memset(mpb, 0, mpb_size);
+ memset(super->buf, 0, mpb_size);
+ mpb = super->buf;
+ mpb->mpb_size = __cpu_to_le32(mpb_size);
+ st->sb = super;
- memcpy(mpb->sig, MPB_SIGNATURE, strlen(MPB_SIGNATURE));
- memcpy(mpb->sig + strlen(MPB_SIGNATURE), MPB_VERSION_RAID5,
- strlen(MPB_VERSION_RAID5));
- mpb->mpb_size = mpb_size;
+ if (info == NULL) {
+ /* zeroing superblock */
+ return 0;
+ }
+
+ mpb->attributes = MPB_ATTRIB_CHECKSUM_VERIFY;
+
+ version = (char *) mpb->sig;
+ strcpy(version, MPB_SIGNATURE);
+ version += strlen(MPB_SIGNATURE);
+ strcpy(version, MPB_VERSION_RAID0);
- super->mpb = mpb;
- st->sb = super;
return 1;
}
-static void add_to_super_imsm_volume(struct supertype *st, mdu_disk_info_t *dk,
+#ifndef MDASSEMBLE
+static int add_to_super_imsm_volume(struct supertype *st, mdu_disk_info_t *dk,
int fd, char *devname)
{
struct intel_super *super = st->sb;
- struct imsm_super *mpb = super->mpb;
+ struct imsm_super *mpb = super->anchor;
struct dl *dl;
struct imsm_dev *dev;
struct imsm_map *map;
- struct imsm_disk *disk;
- __u32 status;
- dev = get_imsm_dev(mpb, super->current_vol);
- map = &dev->vol.map[0];
+ dev = get_imsm_dev(super, super->current_vol);
+ map = get_imsm_map(dev, 0);
- for (dl = super->disks; dl ; dl = dl->next)
- if (dl->major == dk->major &&
- dl->minor == dk->minor)
- break;
- if (!dl || ! (dk->state & (1<<MD_DISK_SYNC)))
- return;
+ if (! (dk->state & (1<<MD_DISK_SYNC))) {
+ fprintf(stderr, Name ": %s: Cannot add spare devices to IMSM volume\n",
+ devname);
+ return 1;
+ }
+
+ if (fd == -1) {
+ /* we're doing autolayout so grab the pre-marked (in
+ * validate_geometry) raid_disk
+ */
+ for (dl = super->disks; dl; dl = dl->next)
+ if (dl->raiddisk == dk->raid_disk)
+ break;
+ } else {
+ for (dl = super->disks; dl ; dl = dl->next)
+ if (dl->major == dk->major &&
+ dl->minor == dk->minor)
+ break;
+ }
+
+ if (!dl) {
+ fprintf(stderr, Name ": %s is not a member of the same container\n", devname);
+ return 1;
+ }
- map->disk_ord_tbl[dk->number] = __cpu_to_le32(dl->index);
+ /* add a pristine spare to the metadata */
+ if (dl->index < 0) {
+ dl->index = super->anchor->num_disks;
+ super->anchor->num_disks++;
+ }
+ set_imsm_ord_tbl_ent(map, dk->number, dl->index);
+ dl->disk.status = CONFIGURED_DISK;
+
+ /* if we are creating the first raid device update the family number */
+ if (super->current_vol == 0) {
+ __u32 sum;
+ struct imsm_dev *_dev = __get_imsm_dev(mpb, 0);
+ struct imsm_disk *_disk = __get_imsm_disk(mpb, dl->index);
+
+ *_dev = *dev;
+ *_disk = dl->disk;
+ sum = random32();
+ sum += __gen_imsm_checksum(mpb);
+ mpb->family_num = __cpu_to_le32(sum);
+ mpb->orig_family_num = mpb->family_num;
+ }
- disk = get_imsm_disk(mpb, dl->index);
- status = CONFIGURED_DISK | USABLE_DISK;
- disk->status = __cpu_to_le32(status);
+ return 0;
}
-static void add_to_super_imsm(struct supertype *st, mdu_disk_info_t *dk,
+static int add_to_super_imsm(struct supertype *st, mdu_disk_info_t *dk,
int fd, char *devname)
{
struct intel_super *super = st->sb;
- struct imsm_super *mpb = super->mpb;
- struct imsm_disk *disk;
struct dl *dd;
unsigned long long size;
- __u32 status, id;
+ __u32 id;
int rv;
struct stat stb;
- if (super->current_vol >= 0) {
- add_to_super_imsm_volume(st, dk, fd, devname);
- return;
+ /* if we are on an RAID enabled platform check that the disk is
+ * attached to the raid controller
+ */
+ if (super->hba && !disk_attached_to_hba(fd, super->hba)) {
+ fprintf(stderr,
+ Name ": %s is not attached to the raid controller: %s\n",
+ devname ? : "disk", super->hba);
+ return 1;
}
+ if (super->current_vol >= 0)
+ return add_to_super_imsm_volume(st, dk, fd, devname);
+
fstat(fd, &stb);
dd = malloc(sizeof(*dd));
if (!dd) {
fprintf(stderr,
Name ": malloc failed %s:%d.\n", __func__, __LINE__);
- abort();
+ return 1;
}
memset(dd, 0, sizeof(*dd));
dd->major = major(stb.st_rdev);
dd->minor = minor(stb.st_rdev);
- dd->index = dk->number;
+ dd->index = -1;
dd->devname = devname ? strdup(devname) : NULL;
- dd->next = super->disks;
dd->fd = fd;
+ dd->e = NULL;
rv = imsm_read_serial(fd, devname, dd->serial);
if (rv) {
fprintf(stderr,
- Name ": failed to retrieve scsi serial "
- "using \'%s\' instead\n", devname);
- strcpy((char *) dd->serial, devname);
+ Name ": failed to retrieve scsi serial, aborting\n");
+ free(dd);
+ abort();
}
- if (mpb->num_disks <= dk->number)
- mpb->num_disks = dk->number + 1;
-
- disk = get_imsm_disk(mpb, dk->number);
get_dev_size(fd, NULL, &size);
size /= 512;
- status = USABLE_DISK | SPARE_DISK;
- strcpy((char *) disk->serial, (char *) dd->serial);
- disk->total_blocks = __cpu_to_le32(size);
- disk->status = __cpu_to_le32(status);
+ serialcpy(dd->disk.serial, dd->serial);
+ dd->disk.total_blocks = __cpu_to_le32(size);
+ dd->disk.status = SPARE_DISK;
if (sysfs_disk_to_scsi_id(fd, &id) == 0)
- disk->scsi_id = __cpu_to_le32(id);
+ dd->disk.scsi_id = __cpu_to_le32(id);
else
- disk->scsi_id = __cpu_to_le32(0);
+ dd->disk.scsi_id = __cpu_to_le32(0);
+
+ if (st->update_tail) {
+ dd->next = super->add;
+ super->add = dd;
+ } else {
+ dd->next = super->disks;
+ super->disks = dd;
+ }
- /* update the family number if we are creating a container */
- if (super->creating_imsm)
- mpb->family_num = __cpu_to_le32(gen_imsm_checksum(mpb));
-
- super->disks = dd;
+ return 0;
}
-static int store_imsm_mpb(int fd, struct intel_super *super);
+static int store_imsm_mpb(int fd, struct imsm_super *mpb);
+
+static union {
+ char buf[512];
+ struct imsm_super anchor;
+} spare_record __attribute__ ((aligned(512)));
+
+/* spare records have their own family number and do not have any defined raid
+ * devices
+ */
+static int write_super_imsm_spares(struct intel_super *super, int doclose)
+{
+ struct imsm_super *mpb = super->anchor;
+ struct imsm_super *spare = &spare_record.anchor;
+ __u32 sum;
+ struct dl *d;
+
+ spare->mpb_size = __cpu_to_le32(sizeof(struct imsm_super)),
+ spare->generation_num = __cpu_to_le32(1UL),
+ spare->attributes = MPB_ATTRIB_CHECKSUM_VERIFY;
+ spare->num_disks = 1,
+ spare->num_raid_devs = 0,
+ spare->cache_size = mpb->cache_size,
+ spare->pwr_cycle_count = __cpu_to_le32(1),
+
+ snprintf((char *) spare->sig, MAX_SIGNATURE_LENGTH,
+ MPB_SIGNATURE MPB_VERSION_RAID0);
+
+ for (d = super->disks; d; d = d->next) {
+ if (d->index != -1)
+ continue;
+
+ spare->disk[0] = d->disk;
+ sum = __gen_imsm_checksum(spare);
+ spare->family_num = __cpu_to_le32(sum);
+ spare->orig_family_num = 0;
+ sum = __gen_imsm_checksum(spare);
+ spare->check_sum = __cpu_to_le32(sum);
+
+ if (store_imsm_mpb(d->fd, spare)) {
+ fprintf(stderr, "%s: failed for device %d:%d %s\n",
+ __func__, d->major, d->minor, strerror(errno));
+ return 1;
+ }
+ if (doclose) {
+ close(d->fd);
+ d->fd = -1;
+ }
+ }
+
+ return 0;
+}
static int write_super_imsm(struct intel_super *super, int doclose)
{
- struct imsm_super *mpb = super->mpb;
+ struct imsm_super *mpb = super->anchor;
struct dl *d;
__u32 generation;
__u32 sum;
+ int spares = 0;
+ int i;
+ __u32 mpb_size = sizeof(struct imsm_super) - sizeof(struct imsm_disk);
/* 'generation' is incremented everytime the metadata is written */
generation = __le32_to_cpu(mpb->generation_num);
generation++;
mpb->generation_num = __cpu_to_le32(generation);
+ /* fix up cases where previous mdadm releases failed to set
+ * orig_family_num
+ */
+ if (mpb->orig_family_num == 0)
+ mpb->orig_family_num = mpb->family_num;
+
+ mpb_size += sizeof(struct imsm_disk) * mpb->num_disks;
+ for (d = super->disks; d; d = d->next) {
+ if (d->index == -1)
+ spares++;
+ else
+ mpb->disk[d->index] = d->disk;
+ }
+ for (d = super->missing; d; d = d->next)
+ mpb->disk[d->index] = d->disk;
+
+ for (i = 0; i < mpb->num_raid_devs; i++) {
+ struct imsm_dev *dev = __get_imsm_dev(mpb, i);
+
+ imsm_copy_dev(dev, get_imsm_dev(super, i));
+ mpb_size += sizeof_imsm_dev(dev, 0);
+ }
+ mpb_size += __le32_to_cpu(mpb->bbm_log_size);
+ mpb->mpb_size = __cpu_to_le32(mpb_size);
+
/* recalculate checksum */
- sum = gen_imsm_checksum(mpb);
+ sum = __gen_imsm_checksum(mpb);
mpb->check_sum = __cpu_to_le32(sum);
+ /* write the mpb for disks that compose raid devices */
for (d = super->disks; d ; d = d->next) {
- if (store_imsm_mpb(d->fd, super)) {
+ if (d->index < 0)
+ continue;
+ if (store_imsm_mpb(d->fd, mpb))
fprintf(stderr, "%s: failed for device %d:%d %s\n",
__func__, d->major, d->minor, strerror(errno));
- return 0;
- }
if (doclose) {
close(d->fd);
d->fd = -1;
}
}
- return 1;
+ if (spares)
+ return write_super_imsm_spares(super, doclose);
+
+ return 0;
}
-static int write_init_super_imsm(struct supertype *st)
+
+static int create_array(struct supertype *st, int dev_idx)
{
- return write_super_imsm(st->sb, 1);
+ size_t len;
+ struct imsm_update_create_array *u;
+ struct intel_super *super = st->sb;
+ struct imsm_dev *dev = get_imsm_dev(super, dev_idx);
+ struct imsm_map *map = get_imsm_map(dev, 0);
+ struct disk_info *inf;
+ struct imsm_disk *disk;
+ int i;
+
+ len = sizeof(*u) - sizeof(*dev) + sizeof_imsm_dev(dev, 0) +
+ sizeof(*inf) * map->num_members;
+ u = malloc(len);
+ if (!u) {
+ fprintf(stderr, "%s: failed to allocate update buffer\n",
+ __func__);
+ return 1;
+ }
+
+ u->type = update_create_array;
+ u->dev_idx = dev_idx;
+ imsm_copy_dev(&u->dev, dev);
+ inf = get_disk_info(u);
+ for (i = 0; i < map->num_members; i++) {
+ int idx = get_imsm_disk_idx(dev, i);
+
+ disk = get_imsm_disk(super, idx);
+ serialcpy(inf[i].serial, disk->serial);
+ }
+ append_metadata_update(st, u, len);
+
+ return 0;
}
-static int store_zero_imsm(struct supertype *st, int fd)
+static int _add_disk(struct supertype *st)
{
- unsigned long long dsize;
- void *buf;
+ struct intel_super *super = st->sb;
+ size_t len;
+ struct imsm_update_add_disk *u;
- get_dev_size(fd, NULL, &dsize);
+ if (!super->add)
+ return 0;
- /* first block is stored on second to last sector of the disk */
- if (lseek64(fd, dsize - (512 * 2), SEEK_SET) < 0)
+ len = sizeof(*u);
+ u = malloc(len);
+ if (!u) {
+ fprintf(stderr, "%s: failed to allocate update buffer\n",
+ __func__);
return 1;
+ }
- if (posix_memalign(&buf, 512, 512) != 0)
- return 1;
+ u->type = update_add_disk;
+ append_metadata_update(st, u, len);
- memset(buf, 0, sizeof(buf));
- if (write(fd, buf, sizeof(buf)) != sizeof(buf))
- return 1;
return 0;
}
+static int write_init_super_imsm(struct supertype *st)
+{
+ struct intel_super *super = st->sb;
+ int current_vol = super->current_vol;
+
+ /* we are done with current_vol reset it to point st at the container */
+ super->current_vol = -1;
+
+ if (st->update_tail) {
+ /* queue the recently created array / added disk
+ * as a metadata update */
+ struct dl *d;
+ int rv;
+
+ /* determine if we are creating a volume or adding a disk */
+ if (current_vol < 0) {
+ /* in the add disk case we are running in mdmon
+ * context, so don't close fd's
+ */
+ return _add_disk(st);
+ } else
+ rv = create_array(st, current_vol);
+
+ for (d = super->disks; d ; d = d->next) {
+ close(d->fd);
+ d->fd = -1;
+ }
+
+ return rv;
+ } else
+ return write_super_imsm(st->sb, 1);
+}
+#endif
+
+static int store_super_imsm(struct supertype *st, int fd)
+{
+ struct intel_super *super = st->sb;
+ struct imsm_super *mpb = super ? super->anchor : NULL;
+
+ if (!mpb)
+ return 1;
+
+#ifndef MDASSEMBLE
+ return store_imsm_mpb(fd, mpb);
+#else
+ return 1;
+#endif
+}
+
+static int imsm_bbm_log_size(struct imsm_super *mpb)
+{
+ return __le32_to_cpu(mpb->bbm_log_size);
+}
+
+#ifndef MDASSEMBLE
static int validate_geometry_imsm_container(struct supertype *st, int level,
int layout, int raiddisks, int chunk,
unsigned long long size, char *dev,
{
int fd;
unsigned long long ldsize;
+ const struct imsm_orom *orom;
if (level != LEVEL_CONTAINER)
return 0;
if (!dev)
return 1;
+ if (check_env("IMSM_NO_PLATFORM"))
+ orom = NULL;
+ else
+ orom = find_imsm_orom();
+ if (orom && raiddisks > orom->tds) {
+ if (verbose)
+ fprintf(stderr, Name ": %d exceeds maximum number of"
+ " platform supported disks: %d\n",
+ raiddisks, orom->tds);
+ return 0;
+ }
+
fd = open(dev, O_RDONLY|O_EXCL, 0);
if (fd < 0) {
if (verbose)
return 1;
}
+static unsigned long long find_size(struct extent *e, int *idx, int num_extents)
+{
+ const unsigned long long base_start = e[*idx].start;
+ unsigned long long end = base_start + e[*idx].size;
+ int i;
+
+ if (base_start == end)
+ return 0;
+
+ *idx = *idx + 1;
+ for (i = *idx; i < num_extents; i++) {
+ /* extend overlapping extents */
+ if (e[i].start >= base_start &&
+ e[i].start <= end) {
+ if (e[i].size == 0)
+ return 0;
+ if (e[i].start + e[i].size > end)
+ end = e[i].start + e[i].size;
+ } else if (e[i].start > end) {
+ *idx = i;
+ break;
+ }
+ }
+
+ return end - base_start;
+}
+
+static unsigned long long merge_extents(struct intel_super *super, int sum_extents)
+{
+ /* build a composite disk with all known extents and generate a new
+ * 'maxsize' given the "all disks in an array must share a common start
+ * offset" constraint
+ */
+ struct extent *e = calloc(sum_extents, sizeof(*e));
+ struct dl *dl;
+ int i, j;
+ int start_extent;
+ unsigned long long pos;
+ unsigned long long start = 0;
+ unsigned long long maxsize;
+ unsigned long reserve;
+
+ if (!e)
+ return 0;
+
+ /* coalesce and sort all extents. also, check to see if we need to
+ * reserve space between member arrays
+ */
+ j = 0;
+ for (dl = super->disks; dl; dl = dl->next) {
+ if (!dl->e)
+ continue;
+ for (i = 0; i < dl->extent_cnt; i++)
+ e[j++] = dl->e[i];
+ }
+ qsort(e, sum_extents, sizeof(*e), cmp_extent);
+
+ /* merge extents */
+ i = 0;
+ j = 0;
+ while (i < sum_extents) {
+ e[j].start = e[i].start;
+ e[j].size = find_size(e, &i, sum_extents);
+ j++;
+ if (e[j-1].size == 0)
+ break;
+ }
+
+ pos = 0;
+ maxsize = 0;
+ start_extent = 0;
+ i = 0;
+ do {
+ unsigned long long esize;
+
+ esize = e[i].start - pos;
+ if (esize >= maxsize) {
+ maxsize = esize;
+ start = pos;
+ start_extent = i;
+ }
+ pos = e[i].start + e[i].size;
+ i++;
+ } while (e[i-1].size);
+ free(e);
+
+ if (maxsize == 0)
+ return 0;
+
+ /* FIXME assumes volume at offset 0 is the first volume in a
+ * container
+ */
+ if (start_extent > 0)
+ reserve = IMSM_RESERVED_SECTORS; /* gap between raid regions */
+ else
+ reserve = 0;
+
+ if (maxsize < reserve)
+ return 0;
+
+ super->create_offset = ~((__u32) 0);
+ if (start + reserve > super->create_offset)
+ return 0; /* start overflows create_offset */
+ super->create_offset = start + reserve;
+
+ return maxsize - reserve;
+}
+
+static int is_raid_level_supported(const struct imsm_orom *orom, int level, int raiddisks)
+{
+ if (level < 0 || level == 6 || level == 4)
+ return 0;
+
+ /* if we have an orom prevent invalid raid levels */
+ if (orom)
+ switch (level) {
+ case 0: return imsm_orom_has_raid0(orom);
+ case 1:
+ if (raiddisks > 2)
+ return imsm_orom_has_raid1e(orom);
+ return imsm_orom_has_raid1(orom) && raiddisks == 2;
+ case 10: return imsm_orom_has_raid10(orom) && raiddisks == 4;
+ case 5: return imsm_orom_has_raid5(orom) && raiddisks > 2;
+ }
+ else
+ return 1; /* not on an Intel RAID platform so anything goes */
+
+ return 0;
+}
+
+#define pr_vrb(fmt, arg...) (void) (verbose && fprintf(stderr, Name fmt, ##arg))
+static int
+validate_geometry_imsm_orom(struct intel_super *super, int level, int layout,
+ int raiddisks, int chunk, int verbose)
+{
+ if (!is_raid_level_supported(super->orom, level, raiddisks)) {
+ pr_vrb(": platform does not support raid%d with %d disk%s\n",
+ level, raiddisks, raiddisks > 1 ? "s" : "");
+ return 0;
+ }
+ if (super->orom && level != 1 &&
+ !imsm_orom_has_chunk(super->orom, chunk)) {
+ pr_vrb(": platform does not support a chunk size of: %d\n", chunk);
+ return 0;
+ }
+ if (layout != imsm_level_to_layout(level)) {
+ if (level == 5)
+ pr_vrb(": imsm raid 5 only supports the left-asymmetric layout\n");
+ else if (level == 10)
+ pr_vrb(": imsm raid 10 only supports the n2 layout\n");
+ else
+ pr_vrb(": imsm unknown layout %#x for this raid level %d\n",
+ layout, level);
+ return 0;
+ }
+
+ return 1;
+}
+
/* validate_geometry_imsm_volume - lifted from validate_geometry_ddf_bvd
* FIX ME add ahci details
*/
{
struct stat stb;
struct intel_super *super = st->sb;
+ struct imsm_super *mpb = super->anchor;
struct dl *dl;
unsigned long long pos = 0;
unsigned long long maxsize;
struct extent *e;
int i;
- if (level == LEVEL_CONTAINER)
- return 0;
-
- if (level == 1 && raiddisks > 2) {
- if (verbose)
- fprintf(stderr, Name ": imsm does not support more "
- "than 2 in a raid1 configuration\n");
- return 0;
- }
-
/* We must have the container info already read in. */
if (!super)
return 0;
+ if (!validate_geometry_imsm_orom(super, level, layout, raiddisks, chunk, verbose))
+ return 0;
+
if (!dev) {
/* General test: make sure there is space for
- * 'raiddisks' device extents of size 'size'.
+ * 'raiddisks' device extents of size 'size' at a given
+ * offset
*/
- unsigned long long minsize = size*2 /* convert to blocks */;
+ unsigned long long minsize = size;
+ unsigned long long start_offset = MaxSector;
int dcnt = 0;
if (minsize == 0)
minsize = MPB_SECTOR_CNT + IMSM_RESERVED_SECTORS;
esize = e[i].start - pos;
if (esize >= minsize)
found = 1;
+ if (found && start_offset == MaxSector) {
+ start_offset = pos;
+ break;
+ } else if (found && pos != start_offset) {
+ found = 0;
+ break;
+ }
pos = e[i].start + e[i].size;
i++;
} while (e[i-1].size);
}
return 1;
}
+
/* This device must be a member of the set */
if (stat(dev, &stb) < 0)
return 0;
fprintf(stderr, Name ": %s is not in the "
"same imsm set\n", dev);
return 0;
+ } else if (super->orom && dl->index < 0 && mpb->num_raid_devs) {
+ /* If a volume is present then the current creation attempt
+ * cannot incorporate new spares because the orom may not
+ * understand this configuration (all member disks must be
+ * members of each array in the container).
+ */
+ fprintf(stderr, Name ": %s is a spare and a volume"
+ " is already defined for this container\n", dev);
+ fprintf(stderr, Name ": The option-rom requires all member"
+ " disks to be a member of all volumes\n");
+ return 0;
}
+
+ /* retrieve the largest free space block */
e = get_extents(super, dl);
maxsize = 0;
i = 0;
- if (e) do {
- unsigned long long esize;
- esize = e[i].start - pos;
- if (esize >= maxsize)
- maxsize = esize;
- pos = e[i].start + e[i].size;
- i++;
- } while (e[i-1].size);
+ if (e) {
+ do {
+ unsigned long long esize;
+
+ esize = e[i].start - pos;
+ if (esize >= maxsize)
+ maxsize = esize;
+ pos = e[i].start + e[i].size;
+ i++;
+ } while (e[i-1].size);
+ dl->e = e;
+ dl->extent_cnt = i;
+ } else {
+ if (verbose)
+ fprintf(stderr, Name ": unable to determine free space for: %s\n",
+ dev);
+ return 0;
+ }
+ if (maxsize < size) {
+ if (verbose)
+ fprintf(stderr, Name ": %s not enough space (%llu < %llu)\n",
+ dev, maxsize, size);
+ return 0;
+ }
+
+ /* count total number of extents for merge */
+ i = 0;
+ for (dl = super->disks; dl; dl = dl->next)
+ if (dl->e)
+ i += dl->extent_cnt;
+
+ maxsize = merge_extents(super, i);
+ if (maxsize < size || maxsize == 0) {
+ if (verbose)
+ fprintf(stderr, Name ": not enough space after merge (%llu < %llu)\n",
+ maxsize, size);
+ return 0;
+ }
+
*freesize = maxsize;
return 1;
}
-static int validate_geometry_imsm(struct supertype *st, int level, int layout,
- int raiddisks, int chunk, unsigned long long size,
- char *dev, unsigned long long *freesize,
- int verbose)
+static int reserve_space(struct supertype *st, int raiddisks,
+ unsigned long long size, int chunk,
+ unsigned long long *freesize)
{
- int fd, cfd;
- struct mdinfo *sra;
+ struct intel_super *super = st->sb;
+ struct imsm_super *mpb = super->anchor;
+ struct dl *dl;
+ int i;
+ int extent_cnt;
+ struct extent *e;
+ unsigned long long maxsize;
+ unsigned long long minsize;
+ int cnt;
+ int used;
+
+ /* find the largest common start free region of the possible disks */
+ used = 0;
+ extent_cnt = 0;
+ cnt = 0;
+ for (dl = super->disks; dl; dl = dl->next) {
+ dl->raiddisk = -1;
+
+ if (dl->index >= 0)
+ used++;
+
+ /* don't activate new spares if we are orom constrained
+ * and there is already a volume active in the container
+ */
+ if (super->orom && dl->index < 0 && mpb->num_raid_devs)
+ continue;
- /* if given unused devices create a container
+ e = get_extents(super, dl);
+ if (!e)
+ continue;
+ for (i = 1; e[i-1].size; i++)
+ ;
+ dl->e = e;
+ dl->extent_cnt = i;
+ extent_cnt += i;
+ cnt++;
+ }
+
+ maxsize = merge_extents(super, extent_cnt);
+ minsize = size;
+ if (size == 0)
+ minsize = chunk;
+
+ if (cnt < raiddisks ||
+ (super->orom && used && used != raiddisks) ||
+ maxsize < minsize ||
+ maxsize == 0) {
+ fprintf(stderr, Name ": not enough devices with space to create array.\n");
+ return 0; /* No enough free spaces large enough */
+ }
+
+ if (size == 0) {
+ size = maxsize;
+ if (chunk) {
+ size /= chunk;
+ size *= chunk;
+ }
+ }
+
+ cnt = 0;
+ for (dl = super->disks; dl; dl = dl->next)
+ if (dl->e)
+ dl->raiddisk = cnt++;
+
+ *freesize = size;
+
+ return 1;
+}
+
+static int validate_geometry_imsm(struct supertype *st, int level, int layout,
+ int raiddisks, int chunk, unsigned long long size,
+ char *dev, unsigned long long *freesize,
+ int verbose)
+{
+ int fd, cfd;
+ struct mdinfo *sra;
+
+ /* if given unused devices create a container
* if given given devices in a container create a member volume
*/
if (level == LEVEL_CONTAINER) {
verbose);
}
+ if (!dev) {
+ if (st->sb && freesize) {
+ /* we are being asked to automatically layout a
+ * new volume based on the current contents of
+ * the container. If the the parameters can be
+ * satisfied reserve_space will record the disks,
+ * start offset, and size of the volume to be
+ * created. add_to_super and getinfo_super
+ * detect when autolayout is in progress.
+ */
+ if (!validate_geometry_imsm_orom(st->sb, level, layout,
+ raiddisks, chunk,
+ verbose))
+ return 0;
+ return reserve_space(st, raiddisks, size, chunk, freesize);
+ }
+ return 1;
+ }
if (st->sb) {
/* creating in a given container */
return validate_geometry_imsm_volume(st, level, layout,
case 1:
case 10:
case 5:
- break;
+ return 0;
default:
+ if (verbose)
+ fprintf(stderr, Name
+ ": IMSM only supports levels 0,1,5,10\n");
return 1;
}
return 1;
}
+#endif /* MDASSEMBLE */
+
+static int is_rebuilding(struct imsm_dev *dev)
+{
+ struct imsm_map *migr_map;
+
+ if (!dev->vol.migr_state)
+ return 0;
+
+ if (migr_type(dev) != MIGR_REBUILD)
+ return 0;
+
+ migr_map = get_imsm_map(dev, 1);
+
+ if (migr_map->map_state == IMSM_T_STATE_DEGRADED)
+ return 1;
+ else
+ return 0;
+}
+
+static void update_recovery_start(struct imsm_dev *dev, struct mdinfo *array)
+{
+ struct mdinfo *rebuild = NULL;
+ struct mdinfo *d;
+ __u32 units;
+
+ if (!is_rebuilding(dev))
+ return;
+
+ /* Find the rebuild target, but punt on the dual rebuild case */
+ for (d = array->devs; d; d = d->next)
+ if (d->recovery_start == 0) {
+ if (rebuild)
+ return;
+ rebuild = d;
+ }
+
+ units = __le32_to_cpu(dev->vol.curr_migr_unit);
+ rebuild->recovery_start = units * blocks_per_migr_unit(dev);
+}
+
static struct mdinfo *container_content_imsm(struct supertype *st)
{
* and create appropriate device mdinfo.
*/
struct intel_super *super = st->sb;
- struct imsm_super *mpb = super->mpb;
+ struct imsm_super *mpb = super->anchor;
struct mdinfo *rest = NULL;
int i;
+ /* do not assemble arrays that might have bad blocks */
+ if (imsm_bbm_log_size(super->anchor)) {
+ fprintf(stderr, Name ": BBM log found in metadata. "
+ "Cannot activate array(s).\n");
+ return NULL;
+ }
+
for (i = 0; i < mpb->num_raid_devs; i++) {
- struct imsm_dev *dev = get_imsm_dev(mpb, i);
- struct imsm_vol *vol = &dev->vol;
- struct imsm_map *map = vol->map;
+ struct imsm_dev *dev = get_imsm_dev(super, i);
+ struct imsm_map *map = get_imsm_map(dev, 0);
struct mdinfo *this;
- __u64 sz;
int slot;
+ /* do not publish arrays that are in the middle of an
+ * unsupported migration
+ */
+ if (dev->vol.migr_state &&
+ (migr_type(dev) == MIGR_GEN_MIGR ||
+ migr_type(dev) == MIGR_STATE_CHANGE)) {
+ fprintf(stderr, Name ": cannot assemble volume '%.16s':"
+ " unsupported migration in progress\n",
+ dev->volume);
+ continue;
+ }
+
this = malloc(sizeof(*this));
memset(this, 0, sizeof(*this));
this->next = rest;
- rest = this;
-
- this->array.level = get_imsm_raid_level(map);
- this->array.raid_disks = map->num_members;
- this->array.layout = imsm_level_to_layout(this->array.level);
- this->array.md_minor = -1;
- this->array.ctime = 0;
- this->array.utime = 0;
- this->array.chunk_size = __le16_to_cpu(map->blocks_per_strip) << 9;
- this->array.state = !vol->dirty;
- this->container_member = i;
- if (map->map_state == IMSM_T_STATE_UNINITIALIZED || dev->vol.dirty)
- this->resync_start = 0;
- else
- this->resync_start = ~0ULL;
-
- strncpy(this->name, (char *) dev->volume, MAX_RAID_SERIAL_LEN);
- this->name[MAX_RAID_SERIAL_LEN] = 0;
-
- sprintf(this->text_version, "/%s/%d",
- devnum2devname(st->container_dev),
- this->container_member);
-
- memset(this->uuid, 0, sizeof(this->uuid));
-
- sz = __le32_to_cpu(dev->size_high);
- sz <<= 32;
- sz += __le32_to_cpu(dev->size_low);
- this->component_size = sz;
- this->array.size = this->component_size / 2;
+ super->current_vol = i;
+ getinfo_super_imsm_volume(st, this);
for (slot = 0 ; slot < map->num_members; slot++) {
- struct imsm_disk *disk;
+ unsigned long long recovery_start;
struct mdinfo *info_d;
struct dl *d;
int idx;
- __u32 s;
+ int skip;
+ __u32 ord;
- idx = __le32_to_cpu(map->disk_ord_tbl[slot] & ~(0xff << 24));
+ skip = 0;
+ idx = get_imsm_disk_idx(dev, slot);
+ ord = get_imsm_ord_tbl_ent(dev, slot);
for (d = super->disks; d ; d = d->next)
if (d->index == idx)
break;
+ recovery_start = MaxSector;
if (d == NULL)
- break; /* shouldn't this be continue ?? */
-
- info_d = malloc(sizeof(*info_d));
- if (!info_d)
- break; /* ditto ?? */
- memset(info_d, 0, sizeof(*info_d));
+ skip = 1;
+ if (d && is_failed(&d->disk))
+ skip = 1;
+ if (ord & IMSM_ORD_REBUILD)
+ recovery_start = 0;
+
+ /*
+ * if we skip some disks the array will be assmebled degraded;
+ * reset resync start to avoid a dirty-degraded
+ * situation when performing the intial sync
+ *
+ * FIXME handle dirty degraded
+ */
+ if ((skip || recovery_start == 0) && !dev->vol.dirty)
+ this->resync_start = MaxSector;
+ if (skip)
+ continue;
+
+ info_d = calloc(1, sizeof(*info_d));
+ if (!info_d) {
+ fprintf(stderr, Name ": failed to allocate disk"
+ " for volume %.16s\n", dev->volume);
+ info_d = this->devs;
+ while (info_d) {
+ struct mdinfo *d = info_d->next;
+
+ free(info_d);
+ info_d = d;
+ }
+ free(this);
+ this = rest;
+ break;
+ }
info_d->next = this->devs;
this->devs = info_d;
- disk = get_imsm_disk(mpb, idx);
- s = __le32_to_cpu(disk->status);
-
info_d->disk.number = d->index;
info_d->disk.major = d->major;
info_d->disk.minor = d->minor;
info_d->disk.raid_disk = slot;
- info_d->disk.state = s & CONFIGURED_DISK ? (1 << MD_DISK_ACTIVE) : 0;
- info_d->disk.state |= s & FAILED_DISK ? (1 << MD_DISK_FAULTY) : 0;
- info_d->disk.state |= s & USABLE_DISK ? (1 << MD_DISK_SYNC) : 0;
+ info_d->recovery_start = recovery_start;
- this->array.working_disks++;
+ if (info_d->recovery_start == MaxSector)
+ this->array.working_disks++;
info_d->events = __le32_to_cpu(mpb->generation_num);
info_d->data_offset = __le32_to_cpu(map->pba_of_lba0);
if (d->devname)
strcpy(info_d->name, d->devname);
}
+ /* now that the disk list is up-to-date fixup recovery_start */
+ update_recovery_start(dev, this);
+ rest = this;
}
return rest;
}
+#ifndef MDASSEMBLE
static int imsm_open_new(struct supertype *c, struct active_array *a,
char *inst)
{
+ struct intel_super *super = c->sb;
+ struct imsm_super *mpb = super->anchor;
+
+ if (atoi(inst) >= mpb->num_raid_devs) {
+ fprintf(stderr, "%s: subarry index %d, out of range\n",
+ __func__, atoi(inst));
+ return -ENODEV;
+ }
+
dprintf("imsm: open_new %s\n", inst);
a->info.container_member = atoi(inst);
return 0;
}
-static __u8 imsm_check_degraded(struct imsm_super *mpb, int n, int failed)
+static __u8 imsm_check_degraded(struct intel_super *super, struct imsm_dev *dev, int failed)
{
- struct imsm_dev *dev = get_imsm_dev(mpb, n);
- struct imsm_map *map = dev->vol.map;
+ struct imsm_map *map = get_imsm_map(dev, 0);
if (!failed)
- return map->map_state;
+ return map->map_state == IMSM_T_STATE_UNINITIALIZED ?
+ IMSM_T_STATE_UNINITIALIZED : IMSM_T_STATE_NORMAL;
switch (get_imsm_raid_level(map)) {
case 0:
case 10:
{
/**
- * check to see if any mirrors have failed,
- * otherwise we are degraded
+ * check to see if any mirrors have failed, otherwise we
+ * are degraded. Even numbered slots are mirrored on
+ * slot+1
*/
- int device_per_mirror = 2; /* FIXME is this always the case?
- * and are they always adjacent?
- */
- int failed = 0;
int i;
+ /* gcc -Os complains that this is unused */
+ int insync = insync;
for (i = 0; i < map->num_members; i++) {
- int idx = get_imsm_disk_idx(map, i);
- struct imsm_disk *disk = get_imsm_disk(mpb, idx);
+ __u32 ord = get_imsm_ord_tbl_ent(dev, i);
+ int idx = ord_to_idx(ord);
+ struct imsm_disk *disk;
- if (__le32_to_cpu(disk->status) & FAILED_DISK)
- failed++;
+ /* reset the potential in-sync count on even-numbered
+ * slots. num_copies is always 2 for imsm raid10
+ */
+ if ((i & 1) == 0)
+ insync = 2;
- if (failed >= device_per_mirror)
- return IMSM_T_STATE_FAILED;
+ disk = get_imsm_disk(super, idx);
+ if (!disk || is_failed(disk) || ord & IMSM_ORD_REBUILD)
+ insync--;
- /* reset 'failed' for next mirror set */
- if (!((i + 1) % device_per_mirror))
- failed = 0;
+ /* no in-sync disks left in this mirror the
+ * array has failed
+ */
+ if (insync == 0)
+ return IMSM_T_STATE_FAILED;
}
return IMSM_T_STATE_DEGRADED;
return map->map_state;
}
-static int imsm_count_failed(struct imsm_super *mpb, struct imsm_map *map)
+static int imsm_count_failed(struct intel_super *super, struct imsm_dev *dev)
{
int i;
int failed = 0;
struct imsm_disk *disk;
+ struct imsm_map *map = get_imsm_map(dev, 0);
+ struct imsm_map *prev = get_imsm_map(dev, dev->vol.migr_state);
+ __u32 ord;
+ int idx;
+
+ /* at the beginning of migration we set IMSM_ORD_REBUILD on
+ * disks that are being rebuilt. New failures are recorded to
+ * map[0]. So we look through all the disks we started with and
+ * see if any failures are still present, or if any new ones
+ * have arrived
+ *
+ * FIXME add support for online capacity expansion and
+ * raid-level-migration
+ */
+ for (i = 0; i < prev->num_members; i++) {
+ ord = __le32_to_cpu(prev->disk_ord_tbl[i]);
+ ord |= __le32_to_cpu(map->disk_ord_tbl[i]);
+ idx = ord_to_idx(ord);
- for (i = 0; i < map->num_members; i++) {
- int idx = get_imsm_disk_idx(map, i);
-
- disk = get_imsm_disk(mpb, idx);
- if (__le32_to_cpu(disk->status) & FAILED_DISK)
+ disk = get_imsm_disk(super, idx);
+ if (!disk || is_failed(disk) || ord & IMSM_ORD_REBUILD)
failed++;
}
return failed;
}
-static void imsm_set_array_state(struct active_array *a, int consistent)
+static int is_resyncing(struct imsm_dev *dev)
+{
+ struct imsm_map *migr_map;
+
+ if (!dev->vol.migr_state)
+ return 0;
+
+ if (migr_type(dev) == MIGR_INIT ||
+ migr_type(dev) == MIGR_REPAIR)
+ return 1;
+
+ migr_map = get_imsm_map(dev, 1);
+
+ if (migr_map->map_state == IMSM_T_STATE_NORMAL)
+ return 1;
+ else
+ return 0;
+}
+
+/* return true if we recorded new information */
+static int mark_failure(struct imsm_dev *dev, struct imsm_disk *disk, int idx)
+{
+ __u32 ord;
+ int slot;
+ struct imsm_map *map;
+
+ /* new failures are always set in map[0] */
+ map = get_imsm_map(dev, 0);
+
+ slot = get_imsm_disk_slot(map, idx);
+ if (slot < 0)
+ return 0;
+
+ ord = __le32_to_cpu(map->disk_ord_tbl[slot]);
+ if (is_failed(disk) && (ord & IMSM_ORD_REBUILD))
+ return 0;
+
+ disk->status |= FAILED_DISK;
+ disk->status &= ~CONFIGURED_DISK;
+ set_imsm_ord_tbl_ent(map, slot, idx | IMSM_ORD_REBUILD);
+ if (~map->failed_disk_num == 0)
+ map->failed_disk_num = slot;
+ return 1;
+}
+
+static void mark_missing(struct imsm_dev *dev, struct imsm_disk *disk, int idx)
+{
+ mark_failure(dev, disk, idx);
+
+ if (disk->scsi_id == __cpu_to_le32(~(__u32)0))
+ return;
+
+ disk->scsi_id = __cpu_to_le32(~(__u32)0);
+ memmove(&disk->serial[0], &disk->serial[1], MAX_RAID_SERIAL_LEN - 1);
+}
+
+/* Handle dirty -> clean transititions and resync. Degraded and rebuild
+ * states are handled in imsm_set_disk() with one exception, when a
+ * resync is stopped due to a new failure this routine will set the
+ * 'degraded' state for the array.
+ */
+static int imsm_set_array_state(struct active_array *a, int consistent)
{
int inst = a->info.container_member;
struct intel_super *super = a->container->sb;
- struct imsm_dev *dev = get_imsm_dev(super->mpb, inst);
- struct imsm_map *map = &dev->vol.map[0];
- int dirty = !consistent;
- int failed;
- __u8 map_state;
+ struct imsm_dev *dev = get_imsm_dev(super, inst);
+ struct imsm_map *map = get_imsm_map(dev, 0);
+ int failed = imsm_count_failed(super, dev);
+ __u8 map_state = imsm_check_degraded(super, dev, failed);
+ __u32 blocks_per_unit;
+
+ /* before we activate this array handle any missing disks */
+ if (consistent == 2 && super->missing) {
+ struct dl *dl;
+
+ dprintf("imsm: mark missing\n");
+ end_migration(dev, map_state);
+ for (dl = super->missing; dl; dl = dl->next)
+ mark_missing(dev, &dl->disk, dl->index);
+ super->updates_pending++;
+ }
+
+ if (consistent == 2 &&
+ (!is_resync_complete(&a->info) ||
+ map_state != IMSM_T_STATE_NORMAL ||
+ dev->vol.migr_state))
+ consistent = 0;
- if (a->resync_start == ~0ULL) {
- failed = imsm_count_failed(super->mpb, map);
- map_state = imsm_check_degraded(super->mpb, inst, failed);
- if (!failed)
- map_state = IMSM_T_STATE_NORMAL;
- if (map->map_state != map_state) {
- dprintf("imsm: map_state %d: %d\n",
- inst, map_state);
- map->map_state = map_state;
+ if (is_resync_complete(&a->info)) {
+ /* complete intialization / resync,
+ * recovery and interrupted recovery is completed in
+ * ->set_disk
+ */
+ if (is_resyncing(dev)) {
+ dprintf("imsm: mark resync done\n");
+ end_migration(dev, map_state);
super->updates_pending++;
}
+ } else if (!is_resyncing(dev) && !failed) {
+ /* mark the start of the init process if nothing is failed */
+ dprintf("imsm: mark resync start\n");
+ if (map->map_state == IMSM_T_STATE_UNINITIALIZED)
+ migrate(dev, IMSM_T_STATE_NORMAL, MIGR_INIT);
+ else
+ migrate(dev, IMSM_T_STATE_NORMAL, MIGR_REPAIR);
+ super->updates_pending++;
}
- if (dev->vol.dirty != dirty) {
- dprintf("imsm: mark '%s' (%llu)\n",
- dirty?"dirty":"clean", a->resync_start);
+ /* check if we can update curr_migr_unit from resync_start, recovery_start */
+ blocks_per_unit = blocks_per_migr_unit(dev);
+ if (blocks_per_unit && failed <= 1) {
+ __u32 units32;
+ __u64 units;
- dev->vol.dirty = dirty;
+ if (migr_type(dev) == MIGR_REBUILD)
+ units = min_recovery_start(&a->info) / blocks_per_unit;
+ else
+ units = a->info.resync_start / blocks_per_unit;
+ units32 = units;
+
+ /* check that we did not overflow 32-bits, and that
+ * curr_migr_unit needs updating
+ */
+ if (units32 == units &&
+ __le32_to_cpu(dev->vol.curr_migr_unit) != units32) {
+ dprintf("imsm: mark checkpoint (%u)\n", units32);
+ dev->vol.curr_migr_unit = __cpu_to_le32(units32);
+ super->updates_pending++;
+ }
+ }
+
+ /* mark dirty / clean */
+ if (dev->vol.dirty != !consistent) {
+ dprintf("imsm: mark '%s'\n", consistent ? "clean" : "dirty");
+ if (consistent)
+ dev->vol.dirty = 0;
+ else
+ dev->vol.dirty = 1;
super->updates_pending++;
}
+ return consistent;
}
static void imsm_set_disk(struct active_array *a, int n, int state)
{
int inst = a->info.container_member;
struct intel_super *super = a->container->sb;
- struct imsm_dev *dev = get_imsm_dev(super->mpb, inst);
- struct imsm_map *map = dev->vol.map;
+ struct imsm_dev *dev = get_imsm_dev(super, inst);
+ struct imsm_map *map = get_imsm_map(dev, 0);
struct imsm_disk *disk;
- __u32 status;
- int failed = 0;
- int new_failure = 0;
+ int failed;
+ __u32 ord;
+ __u8 map_state;
if (n > map->num_members)
fprintf(stderr, "imsm: set_disk %d out of range 0..%d\n",
dprintf("imsm: set_disk %d:%x\n", n, state);
- disk = get_imsm_disk(super->mpb, get_imsm_disk_idx(map, n));
+ ord = get_imsm_ord_tbl_ent(dev, n);
+ disk = get_imsm_disk(super, ord_to_idx(ord));
- /* check if we have seen this failure before */
- status = __le32_to_cpu(disk->status);
- if ((state & DS_FAULTY) && !(status & FAILED_DISK)) {
- status |= FAILED_DISK;
- disk->status = __cpu_to_le32(status);
- new_failure = 1;
+ /* check for new failures */
+ if (state & DS_FAULTY) {
+ if (mark_failure(dev, disk, ord_to_idx(ord)))
+ super->updates_pending++;
}
- /**
- * the number of failures have changed, count up 'failed' to determine
- * degraded / failed status
- */
- if (new_failure && map->map_state != IMSM_T_STATE_FAILED)
- failed = imsm_count_failed(super->mpb, map);
+ /* check if in_sync */
+ if (state & DS_INSYNC && ord & IMSM_ORD_REBUILD && is_rebuilding(dev)) {
+ struct imsm_map *migr_map = get_imsm_map(dev, 1);
+
+ set_imsm_ord_tbl_ent(migr_map, n, ord_to_idx(ord));
+ super->updates_pending++;
+ }
- if (failed)
- map->map_state = imsm_check_degraded(super->mpb, inst, failed);
+ failed = imsm_count_failed(super, dev);
+ map_state = imsm_check_degraded(super, dev, failed);
- if (new_failure)
+ /* check if recovery complete, newly degraded, or failed */
+ if (map_state == IMSM_T_STATE_NORMAL && is_rebuilding(dev)) {
+ end_migration(dev, map_state);
+ map = get_imsm_map(dev, 0);
+ map->failed_disk_num = ~0;
super->updates_pending++;
+ } else if (map_state == IMSM_T_STATE_DEGRADED &&
+ map->map_state != map_state &&
+ !dev->vol.migr_state) {
+ dprintf("imsm: mark degraded\n");
+ map->map_state = map_state;
+ super->updates_pending++;
+ } else if (map_state == IMSM_T_STATE_FAILED &&
+ map->map_state != map_state) {
+ dprintf("imsm: mark failed\n");
+ end_migration(dev, map_state);
+ super->updates_pending++;
+ }
}
-static int store_imsm_mpb(int fd, struct intel_super *super)
+static int store_imsm_mpb(int fd, struct imsm_super *mpb)
{
- struct imsm_super *mpb = super->mpb;
+ void *buf = mpb;
__u32 mpb_size = __le32_to_cpu(mpb->mpb_size);
unsigned long long dsize;
unsigned long long sectors;
if (lseek64(fd, dsize - (512 * (2 + sectors)), SEEK_SET) < 0)
return 1;
- if (write(fd, super->buf + 512, 512 * sectors) != 512 * sectors)
+ if (write(fd, buf + 512, 512 * sectors) != 512 * sectors)
return 1;
}
if (lseek64(fd, dsize - (512 * 2), SEEK_SET) < 0)
return 1;
- if (write(fd, super->buf, 512) != 512)
+ if (write(fd, buf, 512) != 512)
return 1;
- fsync(fd);
-
return 0;
}
super->updates_pending = 0;
}
+static struct dl *imsm_readd(struct intel_super *super, int idx, struct active_array *a)
+{
+ struct imsm_dev *dev = get_imsm_dev(super, a->info.container_member);
+ int i = get_imsm_disk_idx(dev, idx);
+ struct dl *dl;
+
+ for (dl = super->disks; dl; dl = dl->next)
+ if (dl->index == i)
+ break;
+
+ if (dl && is_failed(&dl->disk))
+ dl = NULL;
+
+ if (dl)
+ dprintf("%s: found %x:%x\n", __func__, dl->major, dl->minor);
+
+ return dl;
+}
+
+static struct dl *imsm_add_spare(struct intel_super *super, int slot,
+ struct active_array *a, int activate_new)
+{
+ struct imsm_dev *dev = get_imsm_dev(super, a->info.container_member);
+ int idx = get_imsm_disk_idx(dev, slot);
+ struct imsm_super *mpb = super->anchor;
+ struct imsm_map *map;
+ unsigned long long pos;
+ struct mdinfo *d;
+ struct extent *ex;
+ int i, j;
+ int found;
+ __u32 array_start;
+ __u32 array_end;
+ struct dl *dl;
+
+ for (dl = super->disks; dl; dl = dl->next) {
+ /* If in this array, skip */
+ for (d = a->info.devs ; d ; d = d->next)
+ if (d->state_fd >= 0 &&
+ d->disk.major == dl->major &&
+ d->disk.minor == dl->minor) {
+ dprintf("%x:%x already in array\n", dl->major, dl->minor);
+ break;
+ }
+ if (d)
+ continue;
+
+ /* skip in use or failed drives */
+ if (is_failed(&dl->disk) || idx == dl->index ||
+ dl->index == -2) {
+ dprintf("%x:%x status (failed: %d index: %d)\n",
+ dl->major, dl->minor, is_failed(&dl->disk), idx);
+ continue;
+ }
+
+ /* skip pure spares when we are looking for partially
+ * assimilated drives
+ */
+ if (dl->index == -1 && !activate_new)
+ continue;
+
+ /* Does this unused device have the requisite free space?
+ * It needs to be able to cover all member volumes
+ */
+ ex = get_extents(super, dl);
+ if (!ex) {
+ dprintf("cannot get extents\n");
+ continue;
+ }
+ for (i = 0; i < mpb->num_raid_devs; i++) {
+ dev = get_imsm_dev(super, i);
+ map = get_imsm_map(dev, 0);
+
+ /* check if this disk is already a member of
+ * this array
+ */
+ if (get_imsm_disk_slot(map, dl->index) >= 0)
+ continue;
+
+ found = 0;
+ j = 0;
+ pos = 0;
+ array_start = __le32_to_cpu(map->pba_of_lba0);
+ array_end = array_start +
+ __le32_to_cpu(map->blocks_per_member) - 1;
+
+ do {
+ /* check that we can start at pba_of_lba0 with
+ * blocks_per_member of space
+ */
+ if (array_start >= pos && array_end < ex[j].start) {
+ found = 1;
+ break;
+ }
+ pos = ex[j].start + ex[j].size;
+ j++;
+ } while (ex[j-1].size);
+
+ if (!found)
+ break;
+ }
+
+ free(ex);
+ if (i < mpb->num_raid_devs) {
+ dprintf("%x:%x does not have %u to %u available\n",
+ dl->major, dl->minor, array_start, array_end);
+ /* No room */
+ continue;
+ }
+ return dl;
+ }
+
+ return dl;
+}
+
+static struct mdinfo *imsm_activate_spare(struct active_array *a,
+ struct metadata_update **updates)
+{
+ /**
+ * Find a device with unused free space and use it to replace a
+ * failed/vacant region in an array. We replace failed regions one a
+ * array at a time. The result is that a new spare disk will be added
+ * to the first failed array and after the monitor has finished
+ * propagating failures the remainder will be consumed.
+ *
+ * FIXME add a capability for mdmon to request spares from another
+ * container.
+ */
+
+ struct intel_super *super = a->container->sb;
+ int inst = a->info.container_member;
+ struct imsm_dev *dev = get_imsm_dev(super, inst);
+ struct imsm_map *map = get_imsm_map(dev, 0);
+ int failed = a->info.array.raid_disks;
+ struct mdinfo *rv = NULL;
+ struct mdinfo *d;
+ struct mdinfo *di;
+ struct metadata_update *mu;
+ struct dl *dl;
+ struct imsm_update_activate_spare *u;
+ int num_spares = 0;
+ int i;
+
+ for (d = a->info.devs ; d ; d = d->next) {
+ if ((d->curr_state & DS_FAULTY) &&
+ d->state_fd >= 0)
+ /* wait for Removal to happen */
+ return NULL;
+ if (d->state_fd >= 0)
+ failed--;
+ }
+
+ dprintf("imsm: activate spare: inst=%d failed=%d (%d) level=%d\n",
+ inst, failed, a->info.array.raid_disks, a->info.array.level);
+ if (imsm_check_degraded(super, dev, failed) != IMSM_T_STATE_DEGRADED)
+ return NULL;
+
+ /* For each slot, if it is not working, find a spare */
+ for (i = 0; i < a->info.array.raid_disks; i++) {
+ for (d = a->info.devs ; d ; d = d->next)
+ if (d->disk.raid_disk == i)
+ break;
+ dprintf("found %d: %p %x\n", i, d, d?d->curr_state:0);
+ if (d && (d->state_fd >= 0))
+ continue;
+
+ /*
+ * OK, this device needs recovery. Try to re-add the
+ * previous occupant of this slot, if this fails see if
+ * we can continue the assimilation of a spare that was
+ * partially assimilated, finally try to activate a new
+ * spare.
+ */
+ dl = imsm_readd(super, i, a);
+ if (!dl)
+ dl = imsm_add_spare(super, i, a, 0);
+ if (!dl)
+ dl = imsm_add_spare(super, i, a, 1);
+ if (!dl)
+ continue;
+
+ /* found a usable disk with enough space */
+ di = malloc(sizeof(*di));
+ if (!di)
+ continue;
+ memset(di, 0, sizeof(*di));
+
+ /* dl->index will be -1 in the case we are activating a
+ * pristine spare. imsm_process_update() will create a
+ * new index in this case. Once a disk is found to be
+ * failed in all member arrays it is kicked from the
+ * metadata
+ */
+ di->disk.number = dl->index;
+
+ /* (ab)use di->devs to store a pointer to the device
+ * we chose
+ */
+ di->devs = (struct mdinfo *) dl;
+
+ di->disk.raid_disk = i;
+ di->disk.major = dl->major;
+ di->disk.minor = dl->minor;
+ di->disk.state = 0;
+ di->recovery_start = 0;
+ di->data_offset = __le32_to_cpu(map->pba_of_lba0);
+ di->component_size = a->info.component_size;
+ di->container_member = inst;
+ super->random = random32();
+ di->next = rv;
+ rv = di;
+ num_spares++;
+ dprintf("%x:%x to be %d at %llu\n", dl->major, dl->minor,
+ i, di->data_offset);
+
+ break;
+ }
+
+ if (!rv)
+ /* No spares found */
+ return rv;
+ /* Now 'rv' has a list of devices to return.
+ * Create a metadata_update record to update the
+ * disk_ord_tbl for the array
+ */
+ mu = malloc(sizeof(*mu));
+ if (mu) {
+ mu->buf = malloc(sizeof(struct imsm_update_activate_spare) * num_spares);
+ if (mu->buf == NULL) {
+ free(mu);
+ mu = NULL;
+ }
+ }
+ if (!mu) {
+ while (rv) {
+ struct mdinfo *n = rv->next;
+
+ free(rv);
+ rv = n;
+ }
+ return NULL;
+ }
+
+ mu->space = NULL;
+ mu->len = sizeof(struct imsm_update_activate_spare) * num_spares;
+ mu->next = *updates;
+ u = (struct imsm_update_activate_spare *) mu->buf;
+
+ for (di = rv ; di ; di = di->next) {
+ u->type = update_activate_spare;
+ u->dl = (struct dl *) di->devs;
+ di->devs = NULL;
+ u->slot = di->disk.raid_disk;
+ u->array = inst;
+ u->next = u + 1;
+ u++;
+ }
+ (u-1)->next = NULL;
+ *updates = mu;
+
+ return rv;
+}
+
+static int disks_overlap(struct intel_super *super, int idx, struct imsm_update_create_array *u)
+{
+ struct imsm_dev *dev = get_imsm_dev(super, idx);
+ struct imsm_map *map = get_imsm_map(dev, 0);
+ struct imsm_map *new_map = get_imsm_map(&u->dev, 0);
+ struct disk_info *inf = get_disk_info(u);
+ struct imsm_disk *disk;
+ int i;
+ int j;
+
+ for (i = 0; i < map->num_members; i++) {
+ disk = get_imsm_disk(super, get_imsm_disk_idx(dev, i));
+ for (j = 0; j < new_map->num_members; j++)
+ if (serialcmp(disk->serial, inf[j].serial) == 0)
+ return 1;
+ }
+
+ return 0;
+}
+
+static void imsm_delete(struct intel_super *super, struct dl **dlp, int index);
+
+static void imsm_process_update(struct supertype *st,
+ struct metadata_update *update)
+{
+ /**
+ * crack open the metadata_update envelope to find the update record
+ * update can be one of:
+ * update_activate_spare - a spare device has replaced a failed
+ * device in an array, update the disk_ord_tbl. If this disk is
+ * present in all member arrays then also clear the SPARE_DISK
+ * flag
+ */
+ struct intel_super *super = st->sb;
+ struct imsm_super *mpb;
+ enum imsm_update_type type = *(enum imsm_update_type *) update->buf;
+
+ /* update requires a larger buf but the allocation failed */
+ if (super->next_len && !super->next_buf) {
+ super->next_len = 0;
+ return;
+ }
+
+ if (super->next_buf) {
+ memcpy(super->next_buf, super->buf, super->len);
+ free(super->buf);
+ super->len = super->next_len;
+ super->buf = super->next_buf;
+
+ super->next_len = 0;
+ super->next_buf = NULL;
+ }
+
+ mpb = super->anchor;
+
+ switch (type) {
+ case update_activate_spare: {
+ struct imsm_update_activate_spare *u = (void *) update->buf;
+ struct imsm_dev *dev = get_imsm_dev(super, u->array);
+ struct imsm_map *map = get_imsm_map(dev, 0);
+ struct imsm_map *migr_map;
+ struct active_array *a;
+ struct imsm_disk *disk;
+ __u8 to_state;
+ struct dl *dl;
+ unsigned int found;
+ int failed;
+ int victim = get_imsm_disk_idx(dev, u->slot);
+ int i;
+
+ for (dl = super->disks; dl; dl = dl->next)
+ if (dl == u->dl)
+ break;
+
+ if (!dl) {
+ fprintf(stderr, "error: imsm_activate_spare passed "
+ "an unknown disk (index: %d)\n",
+ u->dl->index);
+ return;
+ }
+
+ super->updates_pending++;
+
+ /* count failures (excluding rebuilds and the victim)
+ * to determine map[0] state
+ */
+ failed = 0;
+ for (i = 0; i < map->num_members; i++) {
+ if (i == u->slot)
+ continue;
+ disk = get_imsm_disk(super, get_imsm_disk_idx(dev, i));
+ if (!disk || is_failed(disk))
+ failed++;
+ }
+
+ /* adding a pristine spare, assign a new index */
+ if (dl->index < 0) {
+ dl->index = super->anchor->num_disks;
+ super->anchor->num_disks++;
+ }
+ disk = &dl->disk;
+ disk->status |= CONFIGURED_DISK;
+ disk->status &= ~SPARE_DISK;
+
+ /* mark rebuild */
+ to_state = imsm_check_degraded(super, dev, failed);
+ map->map_state = IMSM_T_STATE_DEGRADED;
+ migrate(dev, to_state, MIGR_REBUILD);
+ migr_map = get_imsm_map(dev, 1);
+ set_imsm_ord_tbl_ent(map, u->slot, dl->index);
+ set_imsm_ord_tbl_ent(migr_map, u->slot, dl->index | IMSM_ORD_REBUILD);
+
+ /* update the family_num to mark a new container
+ * generation, being careful to record the existing
+ * family_num in orig_family_num to clean up after
+ * earlier mdadm versions that neglected to set it.
+ */
+ if (mpb->orig_family_num == 0)
+ mpb->orig_family_num = mpb->family_num;
+ mpb->family_num += super->random;
+
+ /* count arrays using the victim in the metadata */
+ found = 0;
+ for (a = st->arrays; a ; a = a->next) {
+ dev = get_imsm_dev(super, a->info.container_member);
+ map = get_imsm_map(dev, 0);
+
+ if (get_imsm_disk_slot(map, victim) >= 0)
+ found++;
+ }
+
+ /* delete the victim if it is no longer being
+ * utilized anywhere
+ */
+ if (!found) {
+ struct dl **dlp;
+
+ /* We know that 'manager' isn't touching anything,
+ * so it is safe to delete
+ */
+ for (dlp = &super->disks; *dlp; dlp = &(*dlp)->next)
+ if ((*dlp)->index == victim)
+ break;
+
+ /* victim may be on the missing list */
+ if (!*dlp)
+ for (dlp = &super->missing; *dlp; dlp = &(*dlp)->next)
+ if ((*dlp)->index == victim)
+ break;
+ imsm_delete(super, dlp, victim);
+ }
+ break;
+ }
+ case update_create_array: {
+ /* someone wants to create a new array, we need to be aware of
+ * a few races/collisions:
+ * 1/ 'Create' called by two separate instances of mdadm
+ * 2/ 'Create' versus 'activate_spare': mdadm has chosen
+ * devices that have since been assimilated via
+ * activate_spare.
+ * In the event this update can not be carried out mdadm will
+ * (FIX ME) notice that its update did not take hold.
+ */
+ struct imsm_update_create_array *u = (void *) update->buf;
+ struct intel_dev *dv;
+ struct imsm_dev *dev;
+ struct imsm_map *map, *new_map;
+ unsigned long long start, end;
+ unsigned long long new_start, new_end;
+ int i;
+ struct disk_info *inf;
+ struct dl *dl;
+
+ /* handle racing creates: first come first serve */
+ if (u->dev_idx < mpb->num_raid_devs) {
+ dprintf("%s: subarray %d already defined\n",
+ __func__, u->dev_idx);
+ goto create_error;
+ }
+
+ /* check update is next in sequence */
+ if (u->dev_idx != mpb->num_raid_devs) {
+ dprintf("%s: can not create array %d expected index %d\n",
+ __func__, u->dev_idx, mpb->num_raid_devs);
+ goto create_error;
+ }
+
+ new_map = get_imsm_map(&u->dev, 0);
+ new_start = __le32_to_cpu(new_map->pba_of_lba0);
+ new_end = new_start + __le32_to_cpu(new_map->blocks_per_member);
+ inf = get_disk_info(u);
+
+ /* handle activate_spare versus create race:
+ * check to make sure that overlapping arrays do not include
+ * overalpping disks
+ */
+ for (i = 0; i < mpb->num_raid_devs; i++) {
+ dev = get_imsm_dev(super, i);
+ map = get_imsm_map(dev, 0);
+ start = __le32_to_cpu(map->pba_of_lba0);
+ end = start + __le32_to_cpu(map->blocks_per_member);
+ if ((new_start >= start && new_start <= end) ||
+ (start >= new_start && start <= new_end))
+ /* overlap */;
+ else
+ continue;
+
+ if (disks_overlap(super, i, u)) {
+ dprintf("%s: arrays overlap\n", __func__);
+ goto create_error;
+ }
+ }
+
+ /* check that prepare update was successful */
+ if (!update->space) {
+ dprintf("%s: prepare update failed\n", __func__);
+ goto create_error;
+ }
+
+ /* check that all disks are still active before committing
+ * changes. FIXME: could we instead handle this by creating a
+ * degraded array? That's probably not what the user expects,
+ * so better to drop this update on the floor.
+ */
+ for (i = 0; i < new_map->num_members; i++) {
+ dl = serial_to_dl(inf[i].serial, super);
+ if (!dl) {
+ dprintf("%s: disk disappeared\n", __func__);
+ goto create_error;
+ }
+ }
+
+ super->updates_pending++;
+
+ /* convert spares to members and fixup ord_tbl */
+ for (i = 0; i < new_map->num_members; i++) {
+ dl = serial_to_dl(inf[i].serial, super);
+ if (dl->index == -1) {
+ dl->index = mpb->num_disks;
+ mpb->num_disks++;
+ dl->disk.status |= CONFIGURED_DISK;
+ dl->disk.status &= ~SPARE_DISK;
+ }
+ set_imsm_ord_tbl_ent(new_map, i, dl->index);
+ }
+
+ dv = update->space;
+ dev = dv->dev;
+ update->space = NULL;
+ imsm_copy_dev(dev, &u->dev);
+ dv->index = u->dev_idx;
+ dv->next = super->devlist;
+ super->devlist = dv;
+ mpb->num_raid_devs++;
+
+ imsm_update_version_info(super);
+ break;
+ create_error:
+ /* mdmon knows how to release update->space, but not
+ * ((struct intel_dev *) update->space)->dev
+ */
+ if (update->space) {
+ dv = update->space;
+ free(dv->dev);
+ }
+ break;
+ }
+ case update_add_disk:
+
+ /* we may be able to repair some arrays if disks are
+ * being added */
+ if (super->add) {
+ struct active_array *a;
+
+ super->updates_pending++;
+ for (a = st->arrays; a; a = a->next)
+ a->check_degraded = 1;
+ }
+ /* add some spares to the metadata */
+ while (super->add) {
+ struct dl *al;
+
+ al = super->add;
+ super->add = al->next;
+ al->next = super->disks;
+ super->disks = al;
+ dprintf("%s: added %x:%x\n",
+ __func__, al->major, al->minor);
+ }
+
+ break;
+ }
+}
+
+static void imsm_prepare_update(struct supertype *st,
+ struct metadata_update *update)
+{
+ /**
+ * Allocate space to hold new disk entries, raid-device entries or a new
+ * mpb if necessary. The manager synchronously waits for updates to
+ * complete in the monitor, so new mpb buffers allocated here can be
+ * integrated by the monitor thread without worrying about live pointers
+ * in the manager thread.
+ */
+ enum imsm_update_type type = *(enum imsm_update_type *) update->buf;
+ struct intel_super *super = st->sb;
+ struct imsm_super *mpb = super->anchor;
+ size_t buf_len;
+ size_t len = 0;
+
+ switch (type) {
+ case update_create_array: {
+ struct imsm_update_create_array *u = (void *) update->buf;
+ struct intel_dev *dv;
+ struct imsm_dev *dev = &u->dev;
+ struct imsm_map *map = get_imsm_map(dev, 0);
+ struct dl *dl;
+ struct disk_info *inf;
+ int i;
+ int activate = 0;
+
+ inf = get_disk_info(u);
+ len = sizeof_imsm_dev(dev, 1);
+ /* allocate a new super->devlist entry */
+ dv = malloc(sizeof(*dv));
+ if (dv) {
+ dv->dev = malloc(len);
+ if (dv->dev)
+ update->space = dv;
+ else {
+ free(dv);
+ update->space = NULL;
+ }
+ }
+
+ /* count how many spares will be converted to members */
+ for (i = 0; i < map->num_members; i++) {
+ dl = serial_to_dl(inf[i].serial, super);
+ if (!dl) {
+ /* hmm maybe it failed?, nothing we can do about
+ * it here
+ */
+ continue;
+ }
+ if (count_memberships(dl, super) == 0)
+ activate++;
+ }
+ len += activate * sizeof(struct imsm_disk);
+ break;
+ default:
+ break;
+ }
+ }
+
+ /* check if we need a larger metadata buffer */
+ if (super->next_buf)
+ buf_len = super->next_len;
+ else
+ buf_len = super->len;
+
+ if (__le32_to_cpu(mpb->mpb_size) + len > buf_len) {
+ /* ok we need a larger buf than what is currently allocated
+ * if this allocation fails process_update will notice that
+ * ->next_len is set and ->next_buf is NULL
+ */
+ buf_len = ROUND_UP(__le32_to_cpu(mpb->mpb_size) + len, 512);
+ if (super->next_buf)
+ free(super->next_buf);
+
+ super->next_len = buf_len;
+ if (posix_memalign(&super->next_buf, 512, buf_len) == 0)
+ memset(super->next_buf, 0, buf_len);
+ else
+ super->next_buf = NULL;
+ }
+}
+
+/* must be called while manager is quiesced */
+static void imsm_delete(struct intel_super *super, struct dl **dlp, int index)
+{
+ struct imsm_super *mpb = super->anchor;
+ struct dl *iter;
+ struct imsm_dev *dev;
+ struct imsm_map *map;
+ int i, j, num_members;
+ __u32 ord;
+
+ dprintf("%s: deleting device[%d] from imsm_super\n",
+ __func__, index);
+
+ /* shift all indexes down one */
+ for (iter = super->disks; iter; iter = iter->next)
+ if (iter->index > index)
+ iter->index--;
+ for (iter = super->missing; iter; iter = iter->next)
+ if (iter->index > index)
+ iter->index--;
+
+ for (i = 0; i < mpb->num_raid_devs; i++) {
+ dev = get_imsm_dev(super, i);
+ map = get_imsm_map(dev, 0);
+ num_members = map->num_members;
+ for (j = 0; j < num_members; j++) {
+ /* update ord entries being careful not to propagate
+ * ord-flags to the first map
+ */
+ ord = get_imsm_ord_tbl_ent(dev, j);
+
+ if (ord_to_idx(ord) <= index)
+ continue;
+
+ map = get_imsm_map(dev, 0);
+ set_imsm_ord_tbl_ent(map, j, ord_to_idx(ord - 1));
+ map = get_imsm_map(dev, 1);
+ if (map)
+ set_imsm_ord_tbl_ent(map, j, ord - 1);
+ }
+ }
+
+ mpb->num_disks--;
+ super->updates_pending++;
+ if (*dlp) {
+ struct dl *dl = *dlp;
+
+ *dlp = (*dlp)->next;
+ __free_imsm_disk(dl);
+ }
+}
+#endif /* MDASSEMBLE */
+
struct superswitch super_imsm = {
#ifndef MDASSEMBLE
.examine_super = examine_super_imsm,
.brief_examine_super = brief_examine_super_imsm,
+ .brief_examine_subarrays = brief_examine_subarrays_imsm,
+ .export_examine_super = export_examine_super_imsm,
.detail_super = detail_super_imsm,
.brief_detail_super = brief_detail_super_imsm,
.write_init_super = write_init_super_imsm,
+ .validate_geometry = validate_geometry_imsm,
+ .add_to_super = add_to_super_imsm,
+ .detail_platform = detail_platform_imsm,
#endif
.match_home = match_home_imsm,
.uuid_from_super= uuid_from_super_imsm,
.load_super = load_super_imsm,
.init_super = init_super_imsm,
- .add_to_super = add_to_super_imsm,
- .store_super = store_zero_imsm,
+ .store_super = store_super_imsm,
.free_super = free_super_imsm,
.match_metadata_desc = match_metadata_desc_imsm,
.container_content = container_content_imsm,
+ .default_layout = imsm_level_to_layout,
- .validate_geometry = validate_geometry_imsm,
.external = 1,
+ .name = "imsm",
+#ifndef MDASSEMBLE
/* for mdmon */
.open_new = imsm_open_new,
.load_super = load_super_imsm,
.set_array_state= imsm_set_array_state,
.set_disk = imsm_set_disk,
.sync_metadata = imsm_sync_metadata,
+ .activate_spare = imsm_activate_spare,
+ .process_update = imsm_process_update,
+ .prepare_update = imsm_prepare_update,
+#endif /* MDASSEMBLE */
};
projects / thirdparty / mdadm.git / blobdiff