* 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 <values.h>
#include <scsi/sg.h>
#include <ctype.h>
#define MPB_VERSION_RAID5 "1.2.02"
#define MAX_SIGNATURE_LENGTH 32
#define MAX_RAID_SERIAL_LEN 16
+#define MPB_SECTOR_CNT 418
+#define IMSM_RESERVED_SECTORS 4096
/* Disk configuration info. */
#define IMSM_MAX_DEVICES 255
__u8 num_members; /* number of member disks */
__u8 reserved[3];
__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 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 unsigned long long mpb_sectors(struct imsm_super *mpb)
+static unsigned int sector_count(__u32 bytes)
{
- __u32 size = __le32_to_cpu(mpb->mpb_size);
+ return ((bytes + (512-1)) & (~(512-1))) / 512;
+}
- return ((size + (512-1)) & (~(512-1))) / 512;
+static unsigned int mpb_sectors(struct imsm_super *mpb)
+{
+ return sector_count(__le32_to_cpu(mpb->mpb_size));
}
/* 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 */
};
- int updates_pending;
+ 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 */
+ #define IMSM_MAX_RAID_DEVS 2
+ struct imsm_dev *dev_tbl[IMSM_MAX_RAID_DEVS];
struct dl {
struct dl *next;
int index;
__u8 serial[MAX_RAID_SERIAL_LEN];
int major, minor;
char *devname;
+ struct imsm_disk disk;
int fd;
} *disks;
+ struct dl *add; /* list of disks to add while mdmon active */
+ struct bbm_log *bbm_log;
};
-static struct supertype *match_metadata_desc_imsm(char *arg)
+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 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 int imsm_env_devname_as_serial(void)
{
- struct supertype *st;
+ char *val = getenv("IMSM_DEVNAME_AS_SERIAL");
- if (strcmp(arg, "imsm") != 0 &&
- strcmp(arg, "default") != 0
- )
- return NULL;
+ if (val && atoi(val) == 1)
+ return 1;
- st = malloc(sizeof(*st));
- st->ss = &super_imsm;
- st->max_devs = IMSM_MAX_DEVICES;
- st->minor_version = 0;
- st->sb = NULL;
- return st;
+ return 0;
}
-static struct supertype *match_metadata_desc_imsm_raid(char *arg)
+
+static struct supertype *match_metadata_desc_imsm(char *arg)
{
struct supertype *st;
- if (strcmp(arg, "imsm/raid") != 0 &&
- strcmp(arg, "raid") != 0 &&
+ if (strcmp(arg, "imsm") != 0 &&
strcmp(arg, "default") != 0
)
return NULL;
st = malloc(sizeof(*st));
- st->ss = &super_imsm_raid;
+ memset(st, 0, sizeof(*st));
+ st->ss = &super_imsm;
st->max_devs = IMSM_MAX_DEVICES;
st->minor_version = 0;
st->sb = NULL;
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;
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)
{
- size_t size = sizeof(*dev);
+ return sizeof(struct imsm_map) + sizeof(__u32) * (map->num_members - 1);
+}
+
+struct imsm_map *get_imsm_map(struct imsm_dev *dev, int second_map)
+{
+ 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)
+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 __u32 get_imsm_disk_idx(struct imsm_map *map, int slot)
+static struct imsm_dev *get_imsm_dev(struct intel_super *super, __u8 index)
+{
+ if (index >= super->anchor->num_raid_devs)
+ return NULL;
+ return super->dev_tbl[index];
+}
+
+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_tbl = &map->disk_ord_tbl[slot];
+ __u32 ord = get_imsm_ord_tbl_ent(dev, slot);
+
+ return ord_to_idx(ord);
+}
- /* top byte is 'special' */
- return __le32_to_cpu(*ord_tbl & ~(0xff << 24));
+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_raid_level(struct imsm_map *map)
}
#ifndef MDASSEMBLE
+static int cmp_extent(const void *av, const void *bv)
+{
+ const struct extent *a = av;
+ const struct extent *b = bv;
+ if (a->start < b->start)
+ return -1;
+ if (a->start > b->start)
+ return 1;
+ return 0;
+}
+
+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, j;
+ int memberships = 0;
+
+ 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 (j = 0; j < map->num_members; j++) {
+ __u32 index = get_imsm_disk_idx(dev, j);
+
+ if (index == dl->index)
+ memberships++;
+ }
+ }
+ rv = malloc(sizeof(struct extent) * (memberships + 1));
+ if (!rv)
+ return NULL;
+ e = rv;
+
+ 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 (j = 0; j < map->num_members; j++) {
+ __u32 index = get_imsm_disk_idx(dev, j);
+
+ if (index == dl->index) {
+ 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(dl->disk.total_blocks) -
+ (MPB_SECTOR_CNT + IMSM_RESERVED_SECTORS);
+ e->size = 0;
+ return rv;
+}
+
static void print_imsm_dev(struct imsm_dev *dev, int index)
{
__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(" 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))
+ if (index == get_imsm_disk_idx(dev, slot))
break;
- if (slot < map->num_members)
- printf(" This Slot : %d\n", slot);
- else
+ if (slot < map->num_members) {
+ 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 : %s", dev->vol.migr_state ? "migrating" : "idle");
+ if (dev->vol.migr_state)
+ printf(": %s", dev->vol.migr_type ? "rebuilding" : "initializing");
+ printf("\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");
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)
{
- struct imsm_disk *disk = get_imsm_disk(mpb, index);
- char str[MAX_RAID_SERIAL_LEN];
+ struct imsm_disk *disk = __get_imsm_disk(mpb, index);
+ char str[MAX_RAID_SERIAL_LEN + 1];
__u32 s;
__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&FAILED_DISK ? " failed" : "",
s&USABLE_DISK ? " usable" : "");
printf(" Id : %08x\n", __le32_to_cpu(disk->scsi_id));
- sz = __le32_to_cpu(disk->total_blocks) - mpb_sectors(mpb);
+ sz = __le32_to_cpu(disk->total_blocks) -
+ (MPB_SECTOR_CNT + IMSM_RESERVED_SECTORS * mpb->num_raid_devs);
printf(" Usable Size : %llu%s\n", (unsigned long long)sz,
human_size(sz * 512));
}
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;
__u32 sum;
printf(" Generation : %08x\n", __le32_to_cpu(mpb->generation_num));
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);
+ 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", __le64_to_cpu(log->first_spare_lba));
+ }
for (i = 0; i < mpb->num_raid_devs; i++)
- print_imsm_dev(get_imsm_dev(mpb, i), super->disks->index);
+ print_imsm_dev(__get_imsm_dev(mpb, i), super->disks->index);
for (i = 0; i < mpb->num_disks; i++) {
if (i == super->disks->index)
continue;
}
}
+static void getinfo_super_imsm(struct supertype *st, struct mdinfo *info);
+
static void brief_examine_super_imsm(struct supertype *st)
{
- struct intel_super *super = st->sb;
- struct imsm_super *mpb = super->mpb;
+ /* We just write a generic DDF ARRAY entry
+ */
+ struct mdinfo info;
+ char nbuf[64];
- printf("ARRAY /dev/imsm family=%08x metadata=external:imsm\n",
- __le32_to_cpu(mpb->family_num));
+ getinfo_super_imsm(st, &info);
+ fname_from_uuid(st, &info, nbuf,'-');
+ printf("ARRAY /dev/imsm metadata=imsm UUID=%s\n", nbuf + 5);
}
static void detail_super_imsm(struct supertype *st, char *homehost)
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);
}
#endif
{
printf("%s\n", __FUNCTION__);
- 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 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;
+
+ sha1_init_ctx(&ctx);
+ sha1_process_bytes(super->anchor->sig, MAX_SIGNATURE_LENGTH, &ctx);
+ sha1_process_bytes(&super->anchor->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
static void
get_imsm_numerical_version(struct imsm_super *mpb, int *m, int *p)
{
*m = strtol(minor, NULL, 0);
*p = strtol(patch, NULL, 0);
}
+#endif
+
+static int imsm_level_to_layout(int level)
+{
+ switch (level) {
+ case 0:
+ case 1:
+ return 0;
+ case 5:
+ case 6:
+ return ALGORITHM_LEFT_ASYMMETRIC;
+ case 10:
+ return 0x102; //FIXME is this correct?
+ }
+ return -1;
+}
+
+static void getinfo_super_imsm_volume(struct supertype *st, struct mdinfo *info)
+{
+ struct intel_super *super = st->sb;
+ struct imsm_dev *dev = get_imsm_dev(super, super->current_vol);
+ struct imsm_map *map = get_imsm_map(dev, 0);
+
+ info->container_member = super->current_vol;
+ info->array.raid_disks = map->num_members;
+ info->array.level = get_imsm_raid_level(map);
+ info->array.layout = imsm_level_to_layout(info->array.level);
+ info->array.md_minor = -1;
+ info->array.ctime = 0;
+ info->array.utime = 0;
+ info->array.chunk_size = __le16_to_cpu(map->blocks_per_strip) << 9;
+ info->array.state = !dev->vol.dirty;
+
+ info->disk.major = 0;
+ info->disk.minor = 0;
+
+ 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 || dev->vol.migr_state)
+ info->resync_start = 0;
+ else
+ info->resync_start = ~0ULL;
+
+ 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);
+}
+
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;
- int i, j;
- info->array.major_version = 2000;
- get_imsm_numerical_version(mpb, &info->array.minor_version,
- &info->array.patch_version);
- info->array.raid_disks = mpb->num_disks;
+ if (super->current_vol >= 0) {
+ getinfo_super_imsm_volume(st, info);
+ return;
+ }
+
+ /* 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->array.ctime = __le32_to_cpu(mpb->generation_num); //??
+ info->array.ctime = 0; /* N/A for imsm */
info->array.utime = 0;
info->array.chunk_size = 0;
info->disk.major = 0;
info->disk.minor = 0;
- info->disk.number = super->disks->index;
info->disk.raid_disk = -1;
- /* is this disk a member of a raid device? */
- 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);
-
- if (index == super->disks->index) {
- info->disk.raid_disk = super->disks->index;
- break;
- }
- }
- if (info->disk.raid_disk != -1)
- break;
- }
- disk = get_imsm_disk(mpb, super->disks->index);
- 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;
info->reshape_active = 0;
-
+ info->array.major_version = -1;
+ info->array.minor_version = -2;
strcpy(info->text_version, "imsm");
-}
-
-static void getinfo_super_imsm_raid(struct supertype *st, struct mdinfo *info)
-{
- printf("%s\n", __FUNCTION__);
-
- sprintf(info->text_version, "/%s/%d",
- devnum2devname(st->container_dev),
- info->container_member); // FIXME is this even set here?
+ info->safe_mode_delay = 0;
+ info->disk.number = -1;
+ info->disk.state = 0;
+ info->name[0] = 0;
+
+ if (super->disks) {
+ disk = &super->disks->disk;
+ 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;
+ }
+ uuid_from_super_imsm(st, info->uuid);
}
static int update_super_imsm(struct supertype *st, struct mdinfo *info,
return rv;
}
-static __u64 avail_size_imsm(struct supertype *st, __u64 size)
+static size_t disks_to_mpb_size(int disks)
{
- printf("%s\n", __FUNCTION__);
+ size_t size;
- return 0;
+ size = sizeof(struct imsm_super);
+ size += (disks - 1) * sizeof(struct imsm_disk);
+ size += 2 * sizeof(struct imsm_dev);
+ /* up to 2 maps per raid device (-2 for imsm_maps in imsm_dev */
+ size += (4 - 2) * sizeof(struct imsm_map);
+ /* 4 possible disk_ord_tbl's */
+ size += 4 * (disks - 1) * sizeof(__u32);
+
+ return size;
+}
+
+static __u64 avail_size_imsm(struct supertype *st, __u64 devsize)
+{
+ if (devsize < (MPB_SECTOR_CNT + IMSM_RESERVED_SECTORS))
+ return 0;
+
+ return devsize - (MPB_SECTOR_CNT + IMSM_RESERVED_SECTORS);
}
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)
+ if (memcmp(first->anchor->sig, sec->anchor->sig, MAX_SIGNATURE_LENGTH) != 0)
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) {
+ if (first->anchor->family_num != sec->anchor->family_num)
+ 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) {
+ first->anchor->num_raid_devs = sec->anchor->num_raid_devs;
+ first->anchor->family_num = sec->anchor->family_num;
+ }
+
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];
- struct stat stb;
- int sg_fd;
- int minor;
- char sg_path[20];
int rv;
int rsp_len;
- int i, cnt;
+ int len;
+ char *c, *rsp_buf;
memset(scsi_serial, 0, sizeof(scsi_serial));
- fstat(fd, &stb);
- minor = minor(stb.st_rdev);
- minor /= 16;
- sprintf(sg_path, "/dev/sg%d", minor);
- sg_fd = open(sg_path, O_RDONLY);
- if (sg_fd < 0) {
- if (devname)
- fprintf(stderr,
- Name ": Failed to open %s for %s: %s\n",
- sg_path, 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 && imsm_env_devname_as_serial()) {
+ memset(serial, 0, MAX_RAID_SERIAL_LEN);
+ fd2devname(fd, (char *) serial);
+ return 0;
+ }
if (rv != 0) {
if (devname)
return rv;
}
+ /* trim whitespace */
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;
- }
-
- serial[MAX_RAID_SERIAL_LEN - 1] = '\0';
+ rsp_buf = (char *) &scsi_serial[4];
+ c = rsp_buf;
+ while (isspace(*c))
+ c++;
+ if (c + MAX_RAID_SERIAL_LEN > rsp_buf + rsp_len)
+ len = rsp_len - (c - rsp_buf);
+ else
+ len = MAX_RAID_SERIAL_LEN;
+ memcpy(serial, c, len);
+ c = (char *) &serial[len - 1];
+ while (isspace(*c) || *c == '\0')
+ *c-- = '\0';
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);
+}
+
static int
load_imsm_disk(int fd, struct intel_super *super, char *devname, int keep_fd)
{
- struct imsm_super *mpb = super->mpb;
struct dl *dl;
struct stat stb;
- struct imsm_disk *disk;
int rv;
int i;
+ int alloc = 1;
+ __u8 serial[MAX_RAID_SERIAL_LEN];
+
+ rv = imsm_read_serial(fd, devname, serial);
+
+ if (rv != 0)
+ return 2;
+
+ /* check if this is a disk we have seen before. it may be a spare in
+ * super->disks while the current anchor believes it is a raid member,
+ * check if we need to update dl->index
+ */
+ for (dl = super->disks; dl; dl = dl->next)
+ if (serialcmp(dl->serial, serial) == 0)
+ break;
+
+ if (!dl)
+ dl = malloc(sizeof(*dl));
+ else
+ alloc = 0;
- dl = malloc(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;
- super->disks = dl;
- rv = imsm_read_serial(fd, devname, dl->serial);
+ if (alloc) {
+ 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;
+ serialcpy(dl->serial, serial);
+ dl->index = -2;
+ } else if (keep_fd) {
+ close(dl->fd);
+ dl->fd = fd;
+ }
- if (rv != 0)
- return 2;
+ /* look up this disk's index in the current anchor */
+ for (i = 0; i < super->anchor->num_disks; i++) {
+ struct imsm_disk *disk_iter;
- /* look up this disk's index */
- for (i = 0; i < mpb->num_disks; i++) {
- disk = get_imsm_disk(mpb, i);
+ disk_iter = __get_imsm_disk(super->anchor, i);
+
+ if (serialcmp(disk_iter->serial, dl->serial) == 0) {
+ __u32 status;
+
+ dl->disk = *disk_iter;
+ status = __le32_to_cpu(dl->disk.status);
+ /* only set index on disks that are a member of a
+ * populated contianer, i.e. one with raid_devs
+ */
+ if (status & FAILED_DISK)
+ dl->index = -2;
+ else if (status & SPARE_DISK)
+ dl->index = -1;
+ else
+ dl->index = i;
- if (memcmp(disk->serial, dl->serial, MAX_RAID_SERIAL_LEN) == 0)
break;
+ }
}
- if (i > mpb->num_disks)
- return 2;
-
- dl->index = i;
+ if (alloc)
+ super->disks = dl;
return 0;
}
-/* load_imsm_mpb - read matrix metadata
- * allocates super->mpb to be freed by free_super
+static void imsm_copy_dev(struct imsm_dev *dest, struct imsm_dev *src)
+{
+ memcpy(dest, src, sizeof_imsm_dev(src, 0));
+}
+
+#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=0 map0state=normal
+ * map1state=unitialized)
+ * 3/ Verify (Resync) (migr_state=1 migr_type=1 map0state=normal
+ * map1state=normal)
+ * 4/ Rebuild (migr_state=1 migr_type=1 map0state=normal
+ * map1state=degraded)
*/
-static int load_imsm_mpb(int fd, struct intel_super *super, char *devname)
+static void migrate(struct imsm_dev *dev, __u8 to_state, int rebuild_resync)
{
- unsigned long long dsize;
- size_t len, mpb_size;
- unsigned long long sectors;
- struct stat;
- struct imsm_super anchor;
- __u32 check_sum;
+ struct imsm_map *dest;
+ struct imsm_map *src = get_imsm_map(dev, 0);
- memset(super, 0, sizeof(*super));
- get_dev_size(fd, NULL, &dsize);
+ dev->vol.migr_state = 1;
+ dev->vol.migr_type = rebuild_resync;
+ dest = get_imsm_map(dev, 1);
- if (lseek64(fd, dsize - (512 * 2), SEEK_SET) < 0) {
- if (devname)
- fprintf(stderr,
- Name ": Cannot seek to anchor block on %s: %s\n",
- devname, strerror(errno));
- return 1;
+ memcpy(dest, src, sizeof_imsm_map(src));
+ src->map_state = to_state;
+}
+#endif
+
+static int parse_raid_devices(struct intel_super *super)
+{
+ 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);
+
+ len = sizeof_imsm_dev(dev_iter, 0);
+ len_migr = sizeof_imsm_dev(dev_iter, 1);
+ if (len_migr > len)
+ space_needed += len_migr - len;
+
+ dev_new = malloc(len_migr);
+ if (!dev_new)
+ return 1;
+ imsm_copy_dev(dev_new, dev_iter);
+ super->dev_tbl[i] = dev_new;
}
- len = sizeof(anchor);
- if (read(fd, &anchor, len) != len) {
- if (devname)
+ /* 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, 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;
+ int rc;
+
+ get_dev_size(fd, NULL, &dsize);
+
+ if (lseek64(fd, dsize - (512 * 2), SEEK_SET) < 0) {
+ if (devname)
fprintf(stderr,
- Name ": Cannot read anchor block on %s: %s\n",
+ Name ": Cannot seek to anchor block on %s: %s\n",
devname, strerror(errno));
return 1;
}
- if (strncmp((char *) anchor.sig, MPB_SIGNATURE, MPB_SIG_LEN) != 0) {
+ if (posix_memalign((void**)&anchor, 512, 512) != 0) {
if (devname)
fprintf(stderr,
- Name ": no IMSM anchor on %s\n", devname);
- return 2;
+ Name ": Failed to allocate imsm anchor buffer"
+ " on %s\n", devname);
+ return 1;
+ }
+ if (read(fd, anchor, 512) != 512) {
+ if (devname)
+ fprintf(stderr,
+ Name ": Cannot read anchor block on %s: %s\n",
+ devname, strerror(errno));
+ free(anchor);
+ return 1;
}
- mpb_size = __le32_to_cpu(anchor.mpb_size);
- super->mpb = malloc(mpb_size < 512 ? 512 : mpb_size);
- if (!super->mpb) {
+ if (strncmp((char *) anchor->sig, MPB_SIGNATURE, MPB_SIG_LEN) != 0) {
if (devname)
fprintf(stderr,
- Name ": unable to allocate %zu byte mpb buffer\n",
- mpb_size);
+ Name ": no IMSM anchor on %s\n", devname);
+ free(anchor);
return 2;
}
- memcpy(super->buf, &anchor, sizeof(anchor));
- /* read the rest of the first block */
- len = 512 - sizeof(anchor);
- if (read(fd, super->buf + sizeof(anchor), len) != len) {
+ __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 ": Cannot read anchor remainder on %s: %s\n",
- devname, strerror(errno));
+ Name ": unable to allocate %zu byte mpb buffer\n",
+ super->len);
+ free(anchor);
return 2;
}
-
- sectors = mpb_sectors(&anchor) - 1;
- if (!sectors)
- return load_imsm_disk(fd, super, devname, 0);
+ memcpy(super->buf, anchor, 512);
+
+ sectors = mpb_sectors(anchor) - 1;
+ free(anchor);
+ if (!sectors) {
+ rc = load_imsm_disk(fd, super, devname, 0);
+ if (rc == 0)
+ rc = parse_raid_devices(super);
+ return rc;
+ }
/* 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 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);
+
+ rc = load_imsm_disk(fd, super, devname, 0);
+ if (rc == 0)
+ rc = parse_raid_devices(super);
+
+ return rc;
}
-struct superswitch super_imsm_container;
+static void __free_imsm_disk(struct dl *d)
+{
+ if (d->fd >= 0)
+ close(d->fd);
+ if (d->devname)
+ free(d->devname);
+ free(d);
+}
static void free_imsm_disks(struct intel_super *super)
{
while (super->disks) {
struct dl *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);
+ }
+}
+
+/* free all the pieces hanging off of a super pointer */
+static void __free_imsm(struct intel_super *super, int free_disks)
+{
+ int i;
+
+ if (super->buf) {
+ free(super->buf);
+ super->buf = NULL;
}
+ if (free_disks)
+ free_imsm_disks(super);
+ for (i = 0; i < IMSM_MAX_RAID_DEVS; i++)
+ if (super->dev_tbl[i]) {
+ free(super->dev_tbl[i]);
+ super->dev_tbl[i] = 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;
st->sb = NULL;
}
+static struct intel_super *alloc_super(int creating_imsm)
+{
+ struct intel_super *super = malloc(sizeof(*super));
+
+ if (super) {
+ memset(super, 0, sizeof(*super));
+ super->creating_imsm = creating_imsm;
+ super->current_vol = -1;
+ }
+
+ return super;
+}
+
#ifndef MDASSEMBLE
static int load_super_imsm_all(struct supertype *st, int fd, void **sbp,
char *devname, int keep_fd)
strcmp(sra->text_version, "imsm") != 0)
return 1;
- super = malloc(sizeof(*super));
+ super = alloc_super(0);
if (!super)
return 1;
- /* find the most up to date disk in this array */
+ /* find the most up to date disk in this array, skipping spares */
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 (!keep_fd)
close(dfd);
if (rv == 0) {
- gen = __le32_to_cpu(super->mpb->generation_num);
+ if (super->anchor->num_raid_devs == 0)
+ gen = 0;
+ else
+ gen = __le32_to_cpu(super->anchor->generation_num);
if (!best || gen > bestgen) {
bestgen = gen;
best = sd;
return 2;
}
- /* reset the disk list */
- free_imsm_disks(super);
-
- /* populate disk list */
+ /* re-parse the disk list with the current anchor */
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);
close(dfd);
}
+ if (st->subarray[0]) {
+ if (atoi(st->subarray) <= super->anchor->num_raid_devs)
+ super->current_vol = atoi(st->subarray);
+ else
+ return 1;
+ }
+
*sbp = super;
+ st->container_dev = fd2devnum(fd);
if (st->ss == NULL) {
- st->ss = &super_imsm_container;
+ st->ss = &super_imsm;
st->minor_version = 0;
st->max_devs = IMSM_MAX_DEVICES;
}
+ 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 */
- super = malloc(sizeof(*super));
+ super = alloc_super(0);
if (!super) {
fprintf(stderr,
Name ": malloc of %zu failed.\n",
st->minor_version = 0;
st->max_devs = IMSM_MAX_DEVICES;
}
+ st->loaded_container = 0;
return 0;
}
-static int init_zero_imsm(struct supertype *st, mdu_array_info_t *info,
- unsigned long long size, char *name,
- char *homehost, int *uuid)
-{
- printf("%s\n", __FUNCTION__);
-
- return 0;
-}
-
-static int init_super_imsm(struct supertype *st, mdu_array_info_t *info,
- unsigned long long size, char *name,
- char *homehost, int *uuid)
+static __u16 info_to_blocks_per_strip(mdu_array_info_t *info)
{
- printf("%s\n", __FUNCTION__);
-
- return 0;
+ if (info->level == 1)
+ return 128;
+ return info->chunk_size >> 9;
}
-static int init_super_imsm_raid(struct supertype *st, mdu_array_info_t *info,
- unsigned long long size, char *name,
- char *homehost, int *uuid)
+static __u32 info_to_num_data_stripes(mdu_array_info_t *info)
{
- printf("%s\n", __FUNCTION__);
+ __u32 num_stripes;
- return 0;
-}
+ num_stripes = (info->size * 2) / info_to_blocks_per_strip(info);
+ if (info->level == 1)
+ num_stripes /= 2;
-static void add_to_super_imsm(struct supertype *st, mdu_disk_info_t *dinfo,
- int fd, char *devname)
-{
- printf("%s\n", __FUNCTION__);
+ return num_stripes;
}
-static void add_to_super_imsm_raid(struct supertype *st, mdu_disk_info_t *dinfo,
- int fd, char *devname)
+static __u32 info_to_blocks_per_member(mdu_array_info_t *info)
{
- printf("%s\n", __FUNCTION__);
+ return (info->size * 2) & ~(info_to_blocks_per_strip(info) - 1);
}
-static int write_init_super_imsm(struct supertype *st)
+static int init_super_imsm_volume(struct supertype *st, mdu_array_info_t *info,
+ unsigned long long size, char *name,
+ char *homehost, int *uuid)
{
- printf("%s\n", __FUNCTION__);
-
- return 0;
-}
+ /* We are creating a volume inside a pre-existing container.
+ * so st->sb is already set.
+ */
+ struct intel_super *super = st->sb;
+ struct imsm_super *mpb = super->anchor;
+ 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;
+ __u32 offset = 0;
+ size_t size_old, size_new;
-static int store_zero_imsm(struct supertype *st, int fd)
-{
- printf("%s\n", __FUNCTION__);
+ if (mpb->num_raid_devs >= 2) {
+ fprintf(stderr, Name": This imsm-container already has the "
+ "maximum of 2 volumes\n");
+ return 0;
+ }
- return 0;
-}
+ /* ensure the mpb is large enough for the new data */
+ size_old = __le32_to_cpu(mpb->mpb_size);
+ size_new = disks_to_mpb_size(info->nr_disks);
+ if (size_new > size_old) {
+ void *mpb_new;
+ size_t size_round = ROUND_UP(size_new, 512);
-static void getinfo_super_n_imsm_container(struct supertype *st, struct mdinfo *info)
-{
- /* just need offset and size...
- * of the metadata??
+ if (posix_memalign(&mpb_new, 512, size_round) != 0) {
+ fprintf(stderr, Name": could not allocate new mpb\n");
+ return 0;
+ }
+ memcpy(mpb_new, mpb, size_old);
+ free(mpb);
+ 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()
*/
- struct intel_super *super = st->sb;
- struct imsm_super *mpb = super->mpb;
- struct imsm_disk *disk = get_imsm_disk(mpb, info->disk.number);
- int sect = mpb_sectors(mpb);
+ if (super->current_vol == 0)
+ mpb->num_disks = 0;
+ sprintf(st->subarray, "%d", idx);
+ dev = malloc(sizeof(*dev) + sizeof(__u32) * (info->raid_disks - 1));
+ if (!dev) {
+ 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);
+ 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;
+ vol->dirty = 0;
+ for (i = 0; i < idx; i++) {
+ struct imsm_dev *prev = get_imsm_dev(super, i);
+ struct imsm_map *pmap = get_imsm_map(prev, 0);
+
+ offset += __le32_to_cpu(pmap->blocks_per_member);
+ offset += IMSM_RESERVED_SECTORS;
+ }
+ map = get_imsm_map(dev, 0);
+ map->pba_of_lba0 = __cpu_to_le32(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->num_data_stripes = __cpu_to_le32(info_to_num_data_stripes(info));
+ map->map_state = info->level ? IMSM_T_STATE_UNINITIALIZED :
+ IMSM_T_STATE_NORMAL;
+
+ 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;
+ }
+ if (info->level == 10)
+ map->raid_level = 1;
+ else
+ map->raid_level = info->level;
- info->data_offset = __le32_to_cpu(disk->total_blocks) - (2 + sect - 1);
- info->component_size = sect;
-}
+ map->num_members = info->raid_disks;
+ for (i = 0; i < map->num_members; i++) {
+ /* initialized in add_to_super */
+ set_imsm_ord_tbl_ent(map, i, 0);
+ }
+ mpb->num_raid_devs++;
+ super->dev_tbl[super->current_vol] = dev;
-static void getinfo_super_n_raid(struct supertype *st, struct mdinfo *info)
-{
- printf("%s\n", __FUNCTION__);
+ return 1;
}
-static int validate_geometry_imsm(struct supertype *st, int level, int layout,
- int raiddisks, int chunk, unsigned long long size,
- char *subdev, unsigned long long *freesize)
+static int init_super_imsm(struct supertype *st, mdu_array_info_t *info,
+ unsigned long long size, char *name,
+ char *homehost, int *uuid)
{
- printf("%s\n", __FUNCTION__);
-
- return 0;
-}
+ /* This is primarily called by Create when creating a new array.
+ * We will then get add_to_super called for each component, and then
+ * write_init_super called to write it out to each device.
+ * For IMSM, Create can create on fresh devices or on a pre-existing
+ * array.
+ * To create on a pre-existing array a different method will be called.
+ * This one is just for fresh drives.
+ */
+ struct intel_super *super;
+ struct imsm_super *mpb;
+ size_t mpb_size;
-static int validate_geometry_imsm_container(struct supertype *st, int level,
- int layout, int raiddisks, int chunk,
- unsigned long long size, char *subdev,
- unsigned long long *freesize)
-{
- printf("%s\n", __FUNCTION__);
+ if (!info) {
+ st->sb = NULL;
+ return 0;
+ }
+ if (st->sb)
+ return init_super_imsm_volume(st, info, size, name, homehost,
+ uuid);
- return 0;
-}
+ super = alloc_super(1);
+ if (!super)
+ return 0;
+ mpb_size = disks_to_mpb_size(info->nr_disks);
+ if (posix_memalign(&super->buf, 512, mpb_size) != 0) {
+ free(super);
+ return 0;
+ }
+ mpb = super->buf;
+ memset(mpb, 0, mpb_size);
-static int validate_geometry_imsm_raid(struct supertype *st, int level,
- int layout, int raiddisks, int chunk,
- unsigned long long size, char *subdev,
- unsigned long long *freesize)
-{
- printf("%s\n", __FUNCTION__);
+ 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;
- return 0;
+ st->sb = super;
+ return 1;
}
-static struct mdinfo *container_content_imsm(struct supertype *st)
+#ifndef MDASSEMBLE
+static void add_to_super_imsm_volume(struct supertype *st, mdu_disk_info_t *dk,
+ int fd, char *devname)
{
- /* Given a container loaded by load_super_imsm_all,
- * extract information about all the arrays into
- * an mdinfo tree.
- *
- * For each imsm_dev create an mdinfo, fill it in,
- * then look for matching devices in super->disks
- * and create appropriate device mdinfo.
- */
struct intel_super *super = st->sb;
- struct imsm_super *mpb = super->mpb;
- struct mdinfo *rest = NULL;
- int i;
-
- 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 mdinfo *this;
- __u64 sz;
- int slot;
+ struct imsm_super *mpb = super->anchor;
+ struct dl *dl;
+ struct imsm_dev *dev;
+ struct imsm_map *map;
+ __u32 status;
- this = malloc(sizeof(*this));
- memset(this, 0, sizeof(*this));
- this->next = rest;
- rest = this;
+ dev = get_imsm_dev(super, super->current_vol);
+ map = get_imsm_map(dev, 0);
- this->array.major_version = 2000;
- get_imsm_numerical_version(mpb, &this->array.minor_version,
- &this->array.patch_version);
- this->array.level = get_imsm_raid_level(map);
- this->array.raid_disks = map->num_members;
- switch(this->array.level) {
- case 0:
- case 1:
- this->array.layout = 0;
- break;
- case 5:
- case 6:
- this->array.layout = ALGORITHM_LEFT_SYMMETRIC;
- break;
- case 10:
- this->array.layout = 0x102; //FIXME is this correct?
+ for (dl = super->disks; dl ; dl = dl->next)
+ if (dl->major == dk->major &&
+ dl->minor == dk->minor)
break;
- default:
- this->array.layout = -1; // FIXME
- }
- 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;
+ if (!dl || ! (dk->state & (1<<MD_DISK_SYNC)))
+ return;
- sprintf(this->text_version, "/%s/%d",
- devnum2devname(st->container_dev),
- this->container_member);
+ /* 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);
+ status = CONFIGURED_DISK | USABLE_DISK;
+ dl->disk.status = __cpu_to_le32(status);
+
+ /* 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 = __gen_imsm_checksum(mpb);
+ mpb->family_num = __cpu_to_le32(sum);
+ }
+}
- memset(this->uuid, 0, sizeof(this->uuid));
+static void add_to_super_imsm(struct supertype *st, mdu_disk_info_t *dk,
+ int fd, char *devname)
+{
+ struct intel_super *super = st->sb;
+ struct dl *dd;
+ unsigned long long size;
+ __u32 status, id;
+ int rv;
+ struct stat stb;
- 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;
+ if (super->current_vol >= 0) {
+ add_to_super_imsm_volume(st, dk, fd, devname);
+ return;
+ }
- for (slot = 0 ; slot < map->num_members; slot++) {
- struct imsm_disk *disk;
- struct mdinfo *info_d;
- struct dl *d;
- int idx;
- __u32 s;
+ fstat(fd, &stb);
+ dd = malloc(sizeof(*dd));
+ if (!dd) {
+ fprintf(stderr,
+ Name ": malloc failed %s:%d.\n", __func__, __LINE__);
+ abort();
+ }
+ memset(dd, 0, sizeof(*dd));
+ dd->major = major(stb.st_rdev);
+ dd->minor = minor(stb.st_rdev);
+ dd->index = -1;
+ dd->devname = devname ? strdup(devname) : NULL;
+ dd->fd = fd;
+ rv = imsm_read_serial(fd, devname, dd->serial);
+ if (rv) {
+ fprintf(stderr,
+ Name ": failed to retrieve scsi serial, aborting\n");
+ free(dd);
+ abort();
+ }
- idx = __le32_to_cpu(map->disk_ord_tbl[slot] & ~(0xff << 24));
- for (d = super->disks; d ; d = d->next)
- if (d->index == idx)
- break;
+ get_dev_size(fd, NULL, &size);
+ size /= 512;
+ status = USABLE_DISK | SPARE_DISK;
+ serialcpy(dd->disk.serial, dd->serial);
+ dd->disk.total_blocks = __cpu_to_le32(size);
+ dd->disk.status = __cpu_to_le32(status);
+ if (sysfs_disk_to_scsi_id(fd, &id) == 0)
+ dd->disk.scsi_id = __cpu_to_le32(id);
+ else
+ 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;
+ }
+}
- if (d == NULL)
- break; /* shouldn't this be continue ?? */
+static int store_imsm_mpb(int fd, struct intel_super *super);
- info_d = malloc(sizeof(*info_d));
- if (!info_d)
- break; /* ditto ?? */
- memset(info_d, 0, sizeof(*info_d));
- info_d->next = this->devs;
- this->devs = info_d;
+/* 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_save;
+ struct imsm_super *mpb = super->anchor;
+ __u32 sum;
+ struct dl *d;
- disk = get_imsm_disk(mpb, idx);
- s = __le32_to_cpu(disk->status);
+ mpb_save = *mpb;
+ mpb->num_raid_devs = 0;
+ mpb->num_disks = 1;
+ mpb->mpb_size = sizeof(struct imsm_super);
+ mpb->generation_num = __cpu_to_le32(1UL);
- 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;
+ for (d = super->disks; d; d = d->next) {
+ if (d->index != -1)
+ continue;
- this->array.working_disks++;
+ mpb->disk[0] = d->disk;
+ sum = __gen_imsm_checksum(mpb);
+ mpb->family_num = __cpu_to_le32(sum);
+ sum = __gen_imsm_checksum(mpb);
+ mpb->check_sum = __cpu_to_le32(sum);
- info_d->events = __le32_to_cpu(mpb->generation_num);
- info_d->data_offset = __le32_to_cpu(map->pba_of_lba0);
- info_d->component_size = __le32_to_cpu(map->blocks_per_member);
- if (d->devname)
- strcpy(info_d->name, d->devname);
+ if (store_imsm_mpb(d->fd, super)) {
+ fprintf(stderr, "%s: failed for device %d:%d %s\n",
+ __func__, d->major, d->minor, strerror(errno));
+ *mpb = mpb_save;
+ return 1;
+ }
+ if (doclose) {
+ close(d->fd);
+ d->fd = -1;
}
}
- return rest;
-}
-
-
-static int imsm_open_new(struct supertype *c, struct active_array *a, int inst)
-{
- fprintf(stderr, "imsm: open_new %d\n", inst);
+ *mpb = mpb_save;
return 0;
}
-static void imsm_set_array_state(struct active_array *a, int consistent)
+static int write_super_imsm(struct intel_super *super, int doclose)
{
- int inst = a->info.container_member;
- struct intel_super *super = a->container->sb;
- struct imsm_dev *dev = get_imsm_dev(super->mpb, inst);
- int dirty = !consistent || (a->resync_start != ~0ULL);
+ 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);
- if (dev->vol.dirty != dirty) {
- fprintf(stderr, "imsm: mark '%s' (%llu)\n",
- dirty?"dirty":"clean", a->resync_start);
+ /* 'generation' is incremented everytime the metadata is written */
+ generation = __le32_to_cpu(mpb->generation_num);
+ generation++;
+ mpb->generation_num = __cpu_to_le32(generation);
- dev->vol.dirty = dirty;
- super->updates_pending++;
+ for (d = super->disks; d; d = d->next) {
+ if (d->index == -1)
+ spares++;
+ else {
+ mpb->disk[d->index] = d->disk;
+ mpb_size += sizeof(struct imsm_disk);
+ }
}
-}
-static __u8 imsm_check_degraded(struct imsm_super *mpb, int n, int failed)
-{
- struct imsm_dev *dev = get_imsm_dev(mpb, n);
- struct imsm_map *map = dev->vol.map;
+ for (i = 0; i < mpb->num_raid_devs; i++) {
+ struct imsm_dev *dev = __get_imsm_dev(mpb, i);
- if (!failed)
- return map->map_state;
+ imsm_copy_dev(dev, super->dev_tbl[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);
+ 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 (d->index < 0)
+ continue;
+ if (store_imsm_mpb(d->fd, super))
+ fprintf(stderr, "%s: failed for device %d:%d %s\n",
+ __func__, d->major, d->minor, strerror(errno));
+ if (doclose) {
+ close(d->fd);
+ d->fd = -1;
+ }
+ }
+
+ if (spares)
+ return write_super_imsm_spares(super, doclose);
+
+ return 0;
+}
+
+
+static int create_array(struct supertype *st)
+{
+ size_t len;
+ struct imsm_update_create_array *u;
+ struct intel_super *super = st->sb;
+ struct imsm_dev *dev = get_imsm_dev(super, super->current_vol);
+
+ len = sizeof(*u) - sizeof(*dev) + sizeof_imsm_dev(dev, 0);
+ 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 = super->current_vol;
+ imsm_copy_dev(&u->dev, dev);
+ append_metadata_update(st, u, len);
+
+ return 0;
+}
+
+static int _add_disk(struct supertype *st)
+{
+ struct intel_super *super = st->sb;
+ size_t len;
+ struct imsm_update_add_disk *u;
+
+ if (!super->add)
+ return 0;
+
+ len = sizeof(*u);
+ u = malloc(len);
+ if (!u) {
+ fprintf(stderr, "%s: failed to allocate update buffer\n",
+ __func__);
+ return 1;
+ }
+
+ u->type = update_add_disk;
+ append_metadata_update(st, u, len);
+
+ return 0;
+}
+
+static int write_init_super_imsm(struct supertype *st)
+{
+ if (st->update_tail) {
+ /* queue the recently created array / added disk
+ * as a metadata update */
+ struct intel_super *super = st->sb;
+ struct dl *d;
+ int rv;
+
+ /* determine if we are creating a volume or adding a disk */
+ if (super->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);
+
+ 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_zero_imsm(struct supertype *st, int fd)
+{
+ unsigned long long dsize;
+ void *buf;
+
+ get_dev_size(fd, NULL, &dsize);
+
+ /* first block is stored on second to last sector of the disk */
+ if (lseek64(fd, dsize - (512 * 2), SEEK_SET) < 0)
+ return 1;
+
+ if (posix_memalign(&buf, 512, 512) != 0)
+ return 1;
+
+ memset(buf, 0, 512);
+ if (write(fd, buf, 512) != 512)
+ return 1;
+ return 0;
+}
+
+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,
+ unsigned long long *freesize,
+ int verbose)
+{
+ int fd;
+ unsigned long long ldsize;
+
+ if (level != LEVEL_CONTAINER)
+ return 0;
+ if (!dev)
+ return 1;
+
+ fd = open(dev, O_RDONLY|O_EXCL, 0);
+ if (fd < 0) {
+ if (verbose)
+ fprintf(stderr, Name ": imsm: Cannot open %s: %s\n",
+ dev, strerror(errno));
+ return 0;
+ }
+ if (!get_dev_size(fd, dev, &ldsize)) {
+ close(fd);
+ return 0;
+ }
+ close(fd);
+
+ *freesize = avail_size_imsm(st, ldsize >> 9);
+
+ return 1;
+}
+
+/* validate_geometry_imsm_volume - lifted from validate_geometry_ddf_bvd
+ * FIX ME add ahci details
+ */
+static int validate_geometry_imsm_volume(struct supertype *st, int level,
+ int layout, int raiddisks, int chunk,
+ unsigned long long size, char *dev,
+ unsigned long long *freesize,
+ int verbose)
+{
+ struct stat stb;
+ struct intel_super *super = st->sb;
+ 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 (!dev) {
+ /* General test: make sure there is space for
+ * 'raiddisks' device extents of size 'size' at a given
+ * offset
+ */
+ unsigned long long minsize = size*2 /* convert to blocks */;
+ unsigned long long start_offset = ~0ULL;
+ int dcnt = 0;
+ if (minsize == 0)
+ minsize = MPB_SECTOR_CNT + IMSM_RESERVED_SECTORS;
+ for (dl = super->disks; dl ; dl = dl->next) {
+ int found = 0;
+
+ pos = 0;
+ i = 0;
+ e = get_extents(super, dl);
+ if (!e) continue;
+ do {
+ unsigned long long esize;
+ esize = e[i].start - pos;
+ if (esize >= minsize)
+ found = 1;
+ if (found && start_offset == ~0ULL) {
+ 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);
+ if (found)
+ dcnt++;
+ free(e);
+ }
+ if (dcnt < raiddisks) {
+ if (verbose)
+ fprintf(stderr, Name ": imsm: Not enough "
+ "devices with space for this array "
+ "(%d < %d)\n",
+ dcnt, raiddisks);
+ return 0;
+ }
+ return 1;
+ }
+ /* This device must be a member of the set */
+ if (stat(dev, &stb) < 0)
+ return 0;
+ if ((S_IFMT & stb.st_mode) != S_IFBLK)
+ return 0;
+ for (dl = super->disks ; dl ; dl = dl->next) {
+ if (dl->major == major(stb.st_rdev) &&
+ dl->minor == minor(stb.st_rdev))
+ break;
+ }
+ if (!dl) {
+ if (verbose)
+ fprintf(stderr, Name ": %s is not in the "
+ "same imsm set\n", dev);
+ return 0;
+ }
+ 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);
+ *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)
+{
+ 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) {
+ /* Must be a fresh device to add to a container */
+ return validate_geometry_imsm_container(st, level, layout,
+ raiddisks, chunk, size,
+ dev, freesize,
+ verbose);
+ }
+
+ if (st->sb) {
+ /* creating in a given container */
+ return validate_geometry_imsm_volume(st, level, layout,
+ raiddisks, chunk, size,
+ dev, freesize, verbose);
+ }
+
+ /* limit creation to the following levels */
+ if (!dev)
+ switch (level) {
+ case 0:
+ case 1:
+ case 10:
+ case 5:
+ break;
+ default:
+ return 1;
+ }
+
+ /* This device needs to be a device in an 'imsm' container */
+ fd = open(dev, O_RDONLY|O_EXCL, 0);
+ if (fd >= 0) {
+ if (verbose)
+ fprintf(stderr,
+ Name ": Cannot create this array on device %s\n",
+ dev);
+ close(fd);
+ return 0;
+ }
+ if (errno != EBUSY || (fd = open(dev, O_RDONLY, 0)) < 0) {
+ if (verbose)
+ fprintf(stderr, Name ": Cannot open %s: %s\n",
+ dev, strerror(errno));
+ return 0;
+ }
+ /* Well, it is in use by someone, maybe an 'imsm' container. */
+ cfd = open_container(fd);
+ if (cfd < 0) {
+ close(fd);
+ if (verbose)
+ fprintf(stderr, Name ": Cannot use %s: It is busy\n",
+ dev);
+ return 0;
+ }
+ sra = sysfs_read(cfd, 0, GET_VERSION);
+ close(fd);
+ if (sra && sra->array.major_version == -1 &&
+ strcmp(sra->text_version, "imsm") == 0) {
+ /* This is a member of a imsm container. Load the container
+ * and try to create a volume
+ */
+ struct intel_super *super;
+
+ if (load_super_imsm_all(st, cfd, (void **) &super, NULL, 1) == 0) {
+ st->sb = super;
+ st->container_dev = fd2devnum(cfd);
+ close(cfd);
+ return validate_geometry_imsm_volume(st, level, layout,
+ raiddisks, chunk,
+ size, dev,
+ freesize, verbose);
+ }
+ close(cfd);
+ } else /* may belong to another container */
+ return 0;
+
+ return 1;
+}
+#endif /* MDASSEMBLE */
+
+static struct mdinfo *container_content_imsm(struct supertype *st)
+{
+ /* Given a container loaded by load_super_imsm_all,
+ * extract information about all the arrays into
+ * an mdinfo tree.
+ *
+ * For each imsm_dev create an mdinfo, fill it in,
+ * then look for matching devices in super->disks
+ * and create appropriate device mdinfo.
+ */
+ struct intel_super *super = st->sb;
+ 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(super, i);
+ struct imsm_map *map = get_imsm_map(dev, 0);
+ struct mdinfo *this;
+ int slot;
+
+ this = malloc(sizeof(*this));
+ memset(this, 0, sizeof(*this));
+ this->next = rest;
+
+ super->current_vol = i;
+ getinfo_super_imsm_volume(st, this);
+ for (slot = 0 ; slot < map->num_members; slot++) {
+ struct mdinfo *info_d;
+ struct dl *d;
+ int idx;
+ int skip;
+ __u32 s;
+ __u32 ord;
+
+ 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;
+
+ if (d == NULL)
+ skip = 1;
+
+ s = d ? __le32_to_cpu(d->disk.status) : 0;
+ if (s & FAILED_DISK)
+ skip = 1;
+ if (!(s & USABLE_DISK))
+ skip = 1;
+ if (ord & IMSM_ORD_REBUILD)
+ skip = 1;
+
+ /*
+ * if we skip some disks the array will be assmebled degraded;
+ * reset resync start to avoid a dirty-degraded situation
+ *
+ * FIXME handle dirty degraded
+ */
+ if (skip && !dev->vol.dirty)
+ this->resync_start = ~0ULL;
+ if (skip)
+ continue;
+
+ info_d = malloc(sizeof(*info_d));
+ if (!info_d) {
+ fprintf(stderr, Name ": failed to allocate disk"
+ " for volume %s\n", (char *) dev->volume);
+ free(this);
+ this = rest;
+ break;
+ }
+ memset(info_d, 0, sizeof(*info_d));
+ info_d->next = this->devs;
+ this->devs = info_d;
+
+ info_d->disk.number = d->index;
+ info_d->disk.major = d->major;
+ info_d->disk.minor = d->minor;
+ info_d->disk.raid_disk = slot;
+
+ this->array.working_disks++;
+
+ info_d->events = __le32_to_cpu(mpb->generation_num);
+ info_d->data_offset = __le32_to_cpu(map->pba_of_lba0);
+ info_d->component_size = __le32_to_cpu(map->blocks_per_member);
+ if (d->devname)
+ strcpy(info_d->name, d->devname);
+ }
+ 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 intel_super *super, struct imsm_dev *dev, int failed)
+{
+ struct imsm_map *map = get_imsm_map(dev, 0);
+
+ if (!failed)
+ return map->map_state == IMSM_T_STATE_UNINITIALIZED ?
+ IMSM_T_STATE_UNINITIALIZED : IMSM_T_STATE_NORMAL;
switch (get_imsm_raid_level(map)) {
case 0:
int device_per_mirror = 2; /* FIXME is this always the case?
* and are they always adjacent?
*/
- int failed = 0;
+ int r10fail = 0;
int i;
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);
+ int idx = get_imsm_disk_idx(dev, i);
+ struct imsm_disk *disk = get_imsm_disk(super, idx);
- if (__le32_to_cpu(disk->status) & FAILED_DISK)
- failed++;
+ if (!disk)
+ r10fail++;
+ else if (__le32_to_cpu(disk->status) & FAILED_DISK)
+ r10fail++;
- if (failed >= device_per_mirror)
+ if (r10fail >= device_per_mirror)
return IMSM_T_STATE_FAILED;
- /* reset 'failed' for next mirror set */
+ /* reset 'r10fail' for next mirror set */
if (!((i + 1) % device_per_mirror))
- failed = 0;
+ r10fail = 0;
}
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);
for (i = 0; i < map->num_members; i++) {
- int idx = get_imsm_disk_idx(map, i);
+ __u32 ord = get_imsm_ord_tbl_ent(dev, i);
+ int idx = ord_to_idx(ord);
- disk = get_imsm_disk(mpb, idx);
- if (__le32_to_cpu(disk->status) & FAILED_DISK)
+ disk = get_imsm_disk(super, idx);
+ if (!disk ||
+ __le32_to_cpu(disk->status) & FAILED_DISK ||
+ ord & IMSM_ORD_REBUILD)
failed++;
}
return failed;
}
+static int is_resyncing(struct imsm_dev *dev)
+{
+ struct imsm_map *migr_map;
+
+ if (!dev->vol.migr_state)
+ return 0;
+
+ if (dev->vol.migr_type == 0)
+ return 1;
+
+ migr_map = get_imsm_map(dev, 1);
+
+ if (migr_map->map_state == IMSM_T_STATE_NORMAL)
+ return 1;
+ else
+ return 0;
+}
+
+static int is_rebuilding(struct imsm_dev *dev)
+{
+ struct imsm_map *migr_map;
+
+ if (!dev->vol.migr_state)
+ return 0;
+
+ if (dev->vol.migr_type == 0)
+ return 0;
+
+ migr_map = get_imsm_map(dev, 1);
+
+ if (migr_map->map_state == IMSM_T_STATE_DEGRADED)
+ return 1;
+ else
+ return 0;
+}
+
+/* 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, 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);
+
+ if (consistent == 2 &&
+ (a->resync_start != ~0ULL ||
+ map_state != IMSM_T_STATE_NORMAL ||
+ dev->vol.migr_state))
+ consistent = 0;
+
+ if (a->resync_start == ~0ULL) {
+ /* complete intialization / resync,
+ * recovery is completed in ->set_disk
+ */
+ if (is_resyncing(dev)) {
+ dprintf("imsm: mark resync done\n");
+ dev->vol.migr_state = 0;
+ map->map_state = 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 (%llu)\n", a->resync_start);
+ map->map_state = map_state;
+ migrate(dev, IMSM_T_STATE_NORMAL,
+ map->map_state == IMSM_T_STATE_NORMAL);
+ super->updates_pending++;
+ }
+
+ /* mark dirty / clean */
+ if (dev->vol.dirty != !consistent) {
+ dprintf("imsm: mark '%s' (%llu)\n",
+ consistent ? "clean" : "dirty", a->resync_start);
+ 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;
+ int failed;
__u32 status;
- int failed = 0;
- int new_failure = 0;
+ __u32 ord;
+ __u8 map_state;
if (n > map->num_members)
fprintf(stderr, "imsm: set_disk %d out of range 0..%d\n",
if (n < 0)
return;
- fprintf(stderr, "imsm: set_disk %d:%x\n", n, state);
+ 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 */
+ /* check for new failures */
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;
+ disk->scsi_id = __cpu_to_le32(~(__u32)0);
+ memmove(&disk->serial[0], &disk->serial[1], MAX_RAID_SERIAL_LEN - 1);
+ super->updates_pending++;
}
+ /* check if in_sync */
+ if (state & DS_INSYNC && ord & IMSM_ORD_REBUILD) {
+ struct imsm_map *migr_map = get_imsm_map(dev, 1);
- /**
- * 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);
+ 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)) {
+ map->map_state = map_state;
+ dev->vol.migr_state = 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");
+ dev->vol.migr_state = 0;
+ map->map_state = map_state;
+ super->updates_pending++;
+ }
}
static int store_imsm_mpb(int fd, struct intel_super *super)
{
- struct imsm_super *mpb = super->mpb;
+ struct imsm_super *mpb = super->anchor;
__u32 mpb_size = __le32_to_cpu(mpb->mpb_size);
unsigned long long dsize;
unsigned long long sectors;
get_dev_size(fd, NULL, &dsize);
+ if (mpb_size > 512) {
+ /* -1 to account for anchor */
+ sectors = mpb_sectors(mpb) - 1;
+
+ /* write the extended mpb to the sectors preceeding the anchor */
+ if (lseek64(fd, dsize - (512 * (2 + sectors)), SEEK_SET) < 0)
+ return 1;
+
+ if (write(fd, super->buf + 512, 512 * sectors) != 512 * sectors)
+ return 1;
+ }
+
/* first block is stored on second to last sector of the disk */
if (lseek64(fd, dsize - (512 * 2), SEEK_SET) < 0)
return 1;
if (write(fd, super->buf, 512) != 512)
return 1;
- if (mpb_size <= 512)
- return 0;
+ return 0;
+}
- /* -1 because we already wrote a sector */
- sectors = mpb_sectors(mpb) - 1;
+static void imsm_sync_metadata(struct supertype *container)
+{
+ struct intel_super *super = container->sb;
- /* write the extended mpb to the sectors preceeding the anchor */
- if (lseek64(fd, dsize - (512 * (2 + sectors)), SEEK_SET) < 0)
- return 1;
+ if (!super->updates_pending)
+ return;
- if (write(fd, super->buf + 512, mpb_size - 512) != mpb_size - 512)
- return 1;
+ write_super_imsm(super, 0);
- fsync(fd);
+ super->updates_pending = 0;
+}
- return 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 && __le32_to_cpu(dl->disk.status) & FAILED_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)
+{
+ struct imsm_dev *dev = get_imsm_dev(super, a->info.container_member);
+ int idx = get_imsm_disk_idx(dev, slot);
+ struct imsm_map *map = get_imsm_map(dev, 0);
+ unsigned long long esize;
+ unsigned long long pos;
+ struct mdinfo *d;
+ struct extent *ex;
+ int j;
+ int found;
+ __u32 array_start;
+ __u32 status;
+ 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 */
+ status = __le32_to_cpu(dl->disk.status);
+ if (status & FAILED_DISK || idx == dl->index) {
+ dprintf("%x:%x status ( %s%s)\n",
+ dl->major, dl->minor,
+ status & FAILED_DISK ? "failed " : "",
+ idx == dl->index ? "in use " : "");
+ continue;
+ }
+
+ /* Does this unused device have the requisite free space?
+ * We need a->info.component_size sectors
+ */
+ ex = get_extents(super, dl);
+ if (!ex) {
+ dprintf("cannot get extents\n");
+ continue;
+ }
+ found = 0;
+ j = 0;
+ pos = 0;
+ array_start = __le32_to_cpu(map->pba_of_lba0);
+
+ do {
+ /* check that we can start at pba_of_lba0 with
+ * a->info.component_size of space
+ */
+ esize = ex[j].start - pos;
+ if (array_start >= pos &&
+ array_start + a->info.component_size < ex[j].start) {
+ found = 1;
+ break;
+ }
+ pos = ex[j].start + ex[j].size;
+ j++;
+
+ } while (ex[j-1].size);
+
+ free(ex);
+ if (!found) {
+ dprintf("%x:%x does not have %llu at %d\n",
+ dl->major, dl->minor,
+ a->info.component_size,
+ __le32_to_cpu(map->pba_of_lba0));
+ /* No room */
+ continue;
+ } else
+ break;
+ }
+
+ return dl;
}
-static void imsm_sync_metadata(struct active_array *a)
+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;
- struct imsm_super *mpb = super->mpb;
- struct dl *d;
- __u32 generation;
- __u32 sum;
+ 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;
- if (!super->updates_pending)
+ 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 add a new spare
+ */
+ dl = imsm_readd(super, i, a);
+ if (!dl)
+ dl = imsm_add_spare(super, i, a);
+ if (!dl)
+ continue;
+
+ /* found a usable disk with enough space */
+ di = malloc(sizeof(*di));
+ 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->data_offset = __le32_to_cpu(map->pba_of_lba0);
+ di->component_size = a->info.component_size;
+ di->container_member = inst;
+ 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));
+ mu->buf = malloc(sizeof(struct imsm_update_activate_spare) * num_spares);
+ 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 imsm_dev *d1, struct imsm_dev *d2)
+{
+ struct imsm_map *m1 = get_imsm_map(d1, 0);
+ struct imsm_map *m2 = get_imsm_map(d2, 0);
+ int i;
+ int j;
+ int idx;
+
+ for (i = 0; i < m1->num_members; i++) {
+ idx = get_imsm_disk_idx(d1, i);
+ for (j = 0; j < m2->num_members; j++)
+ if (idx == get_imsm_disk_idx(d2, j))
+ 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;
+ }
- fprintf(stderr, "imsm: sync_metadata\n");
+ 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;
- /* 'generation' is incremented everytime the metadata is written */
- generation = __le32_to_cpu(mpb->generation_num);
- generation++;
- mpb->generation_num = __cpu_to_le32(generation);
+ super->next_len = 0;
+ super->next_buf = NULL;
+ }
- /* recalculate checksum */
- sum = gen_imsm_checksum(mpb);
- mpb->check_sum = __cpu_to_le32(sum);
+ 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;
+ __u32 status;
+ __u8 to_state;
+ struct dl *dl;
+ unsigned int found;
+ int failed;
+ int victim = get_imsm_disk_idx(dev, u->slot);
+ int i;
- for (d = super->disks; d ; d = d->next)
- if (store_imsm_mpb(d->fd, super))
- fprintf(stderr, "%s: failed for device %d:%d %s\n",
- __func__, d->major, d->minor, strerror(errno));
+ for (dl = super->disks; dl; dl = dl->next)
+ if (dl == u->dl)
+ break;
- super->updates_pending = 0;
+ 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 ||
+ __le32_to_cpu(disk->status) & 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;
+ status = __le32_to_cpu(disk->status);
+ status |= CONFIGURED_DISK;
+ status &= ~SPARE_DISK;
+ disk->status = __cpu_to_le32(status);
+
+ /* mark rebuild */
+ to_state = imsm_check_degraded(super, dev, failed);
+ map->map_state = IMSM_T_STATE_DEGRADED;
+ migrate(dev, to_state, 1);
+ 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);
+
+ /* 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);
+ for (i = 0; i < map->num_members; i++)
+ if (victim == get_imsm_disk_idx(dev, i))
+ found++;
+ }
+
+ /* delete the victim if it is no longer being
+ * utilized anywhere
+ */
+ if (!found) {
+ struct dl **dlp;
+
+ for (dlp = &super->disks; *dlp; dlp = &(*dlp)->next)
+ if ((*dlp)->index == victim)
+ break;
+ /* We know that 'manager' isn't touching anything,
+ * so it is safe to:
+ */
+ 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 imsm_dev *dev;
+ struct imsm_map *map, *new_map;
+ unsigned long long start, end;
+ unsigned long long new_start, new_end;
+ int i;
+ int overlap = 0;
+
+ /* 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);
+ return;
+ }
+
+ /* 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);
+ return;
+ }
+
+ 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);
+
+ /* 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 = 1;
+ if (overlap && disks_overlap(dev, &u->dev)) {
+ dprintf("%s: arrays overlap\n", __func__);
+ return;
+ }
+ }
+ /* check num_members sanity */
+ if (new_map->num_members > mpb->num_disks) {
+ dprintf("%s: num_disks out of range\n", __func__);
+ return;
+ }
+
+ /* check that prepare update was successful */
+ if (!update->space) {
+ dprintf("%s: prepare update failed\n", __func__);
+ return;
+ }
+
+ super->updates_pending++;
+ dev = update->space;
+ map = get_imsm_map(dev, 0);
+ update->space = NULL;
+ imsm_copy_dev(dev, &u->dev);
+ map = get_imsm_map(dev, 0);
+ super->dev_tbl[u->dev_idx] = dev;
+ mpb->num_raid_devs++;
+
+ /* fix up flags */
+ for (i = 0; i < map->num_members; i++) {
+ struct imsm_disk *disk;
+ __u32 status;
+
+ disk = get_imsm_disk(super, get_imsm_disk_idx(dev, i));
+ status = __le32_to_cpu(disk->status);
+ status |= CONFIGURED_DISK;
+ status &= ~SPARE_DISK;
+ disk->status = __cpu_to_le32(status);
+ }
+ 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;
+ 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;
+
+ len = sizeof_imsm_dev(&u->dev, 1);
+ update->space = malloc(len);
+ 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, buf_len, 512) != 0)
+ 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 (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,
.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,
#endif
.match_home = match_home_imsm,
.uuid_from_super= uuid_from_super_imsm,
.compare_super = compare_super_imsm,
.load_super = load_super_imsm,
- .init_super = init_zero_imsm,
+ .init_super = init_super_imsm,
.store_super = store_zero_imsm,
.free_super = free_super_imsm,
.match_metadata_desc = match_metadata_desc_imsm,
- .getinfo_super_n = getinfo_super_n_imsm_container,
+ .container_content = container_content_imsm,
- .validate_geometry = validate_geometry_imsm,
- .major = 2000,
- .swapuuid = 0,
.external = 1,
+#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,
-};
-
-/* super_imsm_container is set by validate_geometry_imsm when given a
- * device that is not part of any array
- */
-struct superswitch super_imsm_container = {
-
- .validate_geometry = validate_geometry_imsm_container,
- .init_super = init_super_imsm,
- .add_to_super = add_to_super_imsm,
- .write_init_super = write_init_super_imsm,
- .getinfo_super = getinfo_super_imsm,
- .getinfo_super_n = getinfo_super_n_imsm_container,
- .load_super = load_super_imsm,
-
-#ifndef MDASSEMBLE
- .examine_super = examine_super_imsm,
- .brief_examine_super = brief_examine_super_imsm,
- .detail_super = detail_super_imsm,
- .brief_detail_super = brief_detail_super_imsm,
-#endif
-
- .free_super = free_super_imsm,
-
- .container_content = container_content_imsm,
-
- .major = 2000,
- .swapuuid = 0,
- .external = 1,
-};
-
-struct superswitch super_imsm_raid = {
- .update_super = update_super_imsm,
- .init_super = init_super_imsm_raid,
- .add_to_super = add_to_super_imsm_raid,
- .getinfo_super = getinfo_super_imsm_raid,
- .getinfo_super_n = getinfo_super_n_raid,
- .write_init_super = write_init_super_imsm,
-
- .load_super = load_super_imsm,
- .free_super = free_super_imsm,
- .match_metadata_desc = match_metadata_desc_imsm_raid,
-
-
- .validate_geometry = validate_geometry_imsm_raid,
- .major = 2001,
- .swapuuid = 0,
- .external = 2,
+ .activate_spare = imsm_activate_spare,
+ .process_update = imsm_process_update,
+ .prepare_update = imsm_prepare_update,
+#endif /* MDASSEMBLE */
};
projects / thirdparty / mdadm.git / blobdiff