#define MPB_ATTRIB_RAID5 __cpu_to_le32(0x00000010)
#define MPB_ATTRIB_RAIDCNG __cpu_to_le32(0x00000020)
-#define MPB_SECTOR_CNT 418
+#define MPB_SECTOR_CNT 2210
#define IMSM_RESERVED_SECTORS 4096
#define SECT_PER_MB_SHIFT 11
static char *map_state_str[] = { "normal", "uninitialized", "degraded", "failed" };
#endif
+#define RAID_DISK_RESERVED_BLOCKS_IMSM_HI 2209
+
+#define GEN_MIGR_AREA_SIZE 2048 /* General Migration Copy Area size in blocks */
+
+#define UNIT_SRC_NORMAL 0 /* Source data for curr_migr_unit must
+ * be recovered using srcMap */
+#define UNIT_SRC_IN_CP_AREA 1 /* Source data for curr_migr_unit has
+ * already been migrated and must
+ * be recovered from checkpoint area */
+struct migr_record {
+ __u32 rec_status; /* Status used to determine how to restart
+ * migration in case it aborts
+ * in some fashion */
+ __u32 curr_migr_unit; /* 0..numMigrUnits-1 */
+ __u32 family_num; /* Family number of MPB
+ * containing the RaidDev
+ * that is migrating */
+ __u32 ascending_migr; /* True if migrating in increasing
+ * order of lbas */
+ __u32 blocks_per_unit; /* Num disk blocks per unit of operation */
+ __u32 dest_depth_per_unit; /* Num member blocks each destMap
+ * member disk
+ * advances per unit-of-operation */
+ __u32 ckpt_area_pba; /* Pba of first block of ckpt copy area */
+ __u32 dest_1st_member_lba; /* First member lba on first
+ * stripe of destination */
+ __u32 num_migr_units; /* Total num migration units-of-op */
+ __u32 post_migr_vol_cap; /* Size of volume after
+ * migration completes */
+ __u32 post_migr_vol_cap_hi; /* Expansion space for LBA64 */
+ __u32 ckpt_read_disk_num; /* Which member disk in destSubMap[0] the
+ * migration ckpt record was read from
+ * (for recovered migrations) */
+} __attribute__ ((__packed__));
+
static __u8 migr_type(struct imsm_dev *dev)
{
if (dev->vol.migr_type == MIGR_VERIFY &&
void *buf; /* O_DIRECT buffer for reading/writing metadata */
struct imsm_super *anchor; /* immovable parameters */
};
+ union {
+ void *migr_rec_buf; /* buffer for I/O operations */
+ struct migr_record *migr_rec; /* migration record */
+ };
size_t len; /* size of the 'buf' allocation */
void *next_buf; /* for realloc'ing buf from the manager */
size_t next_len;
int subdev;
int new_level;
int new_layout;
+ int new_chunksize;
int new_disks[1]; /* new_raid_disks - old_raid_disks makedev number */
};
}
#ifndef MDASSEMBLE
-static __u64 blocks_per_migr_unit(struct imsm_dev *dev);
+static __u64 blocks_per_migr_unit(struct intel_super *super,
+ struct imsm_dev *dev);
-static void print_imsm_dev(struct imsm_dev *dev, char *uuid, int disk_idx)
+static void print_imsm_dev(struct intel_super *super,
+ struct imsm_dev *dev,
+ char *uuid,
+ int disk_idx)
{
__u64 sz;
int slot, i;
printf(" <-- %s", map_state_str[map->map_state]);
printf("\n Checkpoint : %u (%llu)",
__le32_to_cpu(dev->vol.curr_migr_unit),
- (unsigned long long)blocks_per_migr_unit(dev));
+ (unsigned long long)blocks_per_migr_unit(super, dev));
}
printf("\n");
printf(" Dirty State : %s\n", dev->vol.dirty ? "dirty" : "clean");
human_size(sz * 512));
}
+static int is_gen_migration(struct imsm_dev *dev);
+
+void examine_migr_rec_imsm(struct intel_super *super)
+{
+ struct migr_record *migr_rec = super->migr_rec;
+ struct imsm_super *mpb = super->anchor;
+ int i;
+
+ for (i = 0; i < mpb->num_raid_devs; i++) {
+ struct imsm_dev *dev = __get_imsm_dev(mpb, i);
+ if (is_gen_migration(dev) == 0)
+ continue;
+
+ printf("\nMigration Record Information:");
+ if (super->disks->index > 1) {
+ printf(" Empty\n ");
+ printf("Examine one of first two disks in array\n");
+ break;
+ }
+ printf("\n Status : ");
+ if (__le32_to_cpu(migr_rec->rec_status) == UNIT_SRC_NORMAL)
+ printf("Normal\n");
+ else
+ printf("Contains Data\n");
+ printf(" Current Unit : %u\n",
+ __le32_to_cpu(migr_rec->curr_migr_unit));
+ printf(" Family : %u\n",
+ __le32_to_cpu(migr_rec->family_num));
+ printf(" Ascending : %u\n",
+ __le32_to_cpu(migr_rec->ascending_migr));
+ printf(" Blocks Per Unit : %u\n",
+ __le32_to_cpu(migr_rec->blocks_per_unit));
+ printf(" Dest. Depth Per Unit : %u\n",
+ __le32_to_cpu(migr_rec->dest_depth_per_unit));
+ printf(" Checkpoint Area pba : %u\n",
+ __le32_to_cpu(migr_rec->ckpt_area_pba));
+ printf(" First member lba : %u\n",
+ __le32_to_cpu(migr_rec->dest_1st_member_lba));
+ printf(" Total Number of Units : %u\n",
+ __le32_to_cpu(migr_rec->num_migr_units));
+ printf(" Size of volume : %u\n",
+ __le32_to_cpu(migr_rec->post_migr_vol_cap));
+ printf(" Expansion space for LBA64 : %u\n",
+ __le32_to_cpu(migr_rec->post_migr_vol_cap_hi));
+ printf(" Record was read from : %u\n",
+ __le32_to_cpu(migr_rec->ckpt_read_disk_num));
+
+ break;
+ }
+}
+
static void getinfo_super_imsm(struct supertype *st, struct mdinfo *info, char *map);
static void examine_super_imsm(struct supertype *st, char *homehost)
super->current_vol = i;
getinfo_super_imsm(st, &info, NULL);
fname_from_uuid(st, &info, nbuf, ':');
- print_imsm_dev(dev, nbuf + 5, super->disks->index);
+ print_imsm_dev(super, dev, nbuf + 5, super->disks->index);
}
for (i = 0; i < mpb->num_disks; i++) {
if (i == super->disks->index)
printf(" Usable Size : %llu%s\n", (unsigned long long)sz,
human_size(sz * 512));
}
+
+ examine_migr_rec_imsm(super);
}
static void brief_examine_super_imsm(struct supertype *st, int verbose)
}
}
-static __u64 blocks_per_migr_unit(struct imsm_dev *dev)
+static __u64 blocks_per_migr_unit(struct intel_super *super,
+ struct imsm_dev *dev)
{
/* calculate the conversion factor between per member 'blocks'
* (md/{resync,rebuild}_start) and imsm migration units, return
return 0;
switch (migr_type(dev)) {
- case MIGR_GEN_MIGR:
+ case MIGR_GEN_MIGR: {
+ struct migr_record *migr_rec = super->migr_rec;
+ return __le32_to_cpu(migr_rec->blocks_per_unit);
+ }
case MIGR_VERIFY:
case MIGR_REPAIR:
case MIGR_INIT: {
return UnSet;
}
+/*******************************************************************************
+ * Function: read_imsm_migr_rec
+ * Description: Function reads imsm migration record from last sector of disk
+ * Parameters:
+ * fd : disk descriptor
+ * super : metadata info
+ * Returns:
+ * 0 : success,
+ * -1 : fail
+ ******************************************************************************/
+static int read_imsm_migr_rec(int fd, struct intel_super *super)
+{
+ int ret_val = -1;
+ unsigned long long dsize;
+
+ get_dev_size(fd, NULL, &dsize);
+ if (lseek64(fd, dsize - 512, SEEK_SET) < 0) {
+ fprintf(stderr,
+ Name ": Cannot seek to anchor block: %s\n",
+ strerror(errno));
+ goto out;
+ }
+ if (read(fd, super->migr_rec_buf, 512) != 512) {
+ fprintf(stderr,
+ Name ": Cannot read migr record block: %s\n",
+ strerror(errno));
+ goto out;
+ }
+ ret_val = 0;
+
+out:
+ return ret_val;
+}
+
+/*******************************************************************************
+ * Function: load_imsm_migr_rec
+ * Description: Function reads imsm migration record (it is stored at the last
+ * sector of disk)
+ * Parameters:
+ * super : imsm internal array info
+ * info : general array info
+ * Returns:
+ * 0 : success
+ * -1 : fail
+ ******************************************************************************/
+static int load_imsm_migr_rec(struct intel_super *super, struct mdinfo *info)
+{
+ struct mdinfo *sd;
+ struct dl *dl = NULL;
+ char nm[30];
+ int retval = -1;
+ int fd = -1;
+
+ if (info) {
+ for (sd = info->devs ; sd ; sd = sd->next) {
+ /* read only from one of the first two slots */
+ if ((sd->disk.raid_disk > 1) ||
+ (sd->disk.raid_disk < 0))
+ continue;
+ sprintf(nm, "%d:%d", sd->disk.major, sd->disk.minor);
+ fd = dev_open(nm, O_RDONLY);
+ if (fd >= 0)
+ break;
+ }
+ }
+ if (fd < 0) {
+ for (dl = super->disks; dl; dl = dl->next) {
+ /* read only from one of the first two slots */
+ if (dl->index > 1)
+ continue;
+ sprintf(nm, "%d:%d", dl->major, dl->minor);
+ fd = dev_open(nm, O_RDONLY);
+ if (fd >= 0)
+ break;
+ }
+ }
+ if (fd < 0)
+ goto out;
+ retval = read_imsm_migr_rec(fd, super);
+
+out:
+ if (fd >= 0)
+ close(fd);
+ return retval;
+}
+
+/*******************************************************************************
+ * Function: write_imsm_migr_rec
+ * Description: Function writes imsm migration record
+ * (at the last sector of disk)
+ * Parameters:
+ * super : imsm internal array info
+ * Returns:
+ * 0 : success
+ * -1 : if fail
+ ******************************************************************************/
+static int write_imsm_migr_rec(struct supertype *st)
+{
+ struct intel_super *super = st->sb;
+ unsigned long long dsize;
+ char nm[30];
+ int fd = -1;
+ int retval = -1;
+ struct dl *sd;
+
+ for (sd = super->disks ; sd ; sd = sd->next) {
+ /* write to 2 first slots only */
+ if ((sd->index < 0) || (sd->index > 1))
+ continue;
+ sprintf(nm, "%d:%d", sd->major, sd->minor);
+ fd = dev_open(nm, O_RDWR);
+ if (fd < 0)
+ continue;
+ get_dev_size(fd, NULL, &dsize);
+ if (lseek64(fd, dsize - 512, SEEK_SET) < 0) {
+ fprintf(stderr,
+ Name ": Cannot seek to anchor block: %s\n",
+ strerror(errno));
+ goto out;
+ }
+ if (write(fd, super->migr_rec_buf, 512) != 512) {
+ fprintf(stderr,
+ Name ": Cannot write migr record block: %s\n",
+ strerror(errno));
+ goto out;
+ }
+ close(fd);
+ fd = -1;
+ }
+
+ retval = 0;
+ out:
+ if (fd >= 0)
+ close(fd);
+ return retval;
+}
+
static void getinfo_super_imsm_volume(struct supertype *st, struct mdinfo *info, char *dmap)
{
struct intel_super *super = st->sb;
+ struct migr_record *migr_rec = super->migr_rec;
struct imsm_dev *dev = get_imsm_dev(super, super->current_vol);
struct imsm_map *map = get_imsm_map(dev, 0);
struct imsm_map *prev_map = get_imsm_map(dev, 1);
unsigned int component_size_alligment;
int map_disks = info->array.raid_disks;
+ memset(info, 0, sizeof(*info));
if (prev_map)
map_to_analyse = prev_map;
switch (migr_type(dev)) {
case MIGR_REPAIR:
case MIGR_INIT: {
- __u64 blocks_per_unit = blocks_per_migr_unit(dev);
+ __u64 blocks_per_unit = blocks_per_migr_unit(super,
+ dev);
__u64 units = __le32_to_cpu(dev->vol.curr_migr_unit);
info->resync_start = blocks_per_unit * units;
break;
}
case MIGR_GEN_MIGR: {
- __u64 blocks_per_unit = blocks_per_migr_unit(dev);
- __u64 units = __le32_to_cpu(dev->vol.curr_migr_unit);
+ __u64 blocks_per_unit = blocks_per_migr_unit(super,
+ dev);
+ __u64 units = __le32_to_cpu(migr_rec->curr_migr_unit);
unsigned long long array_blocks;
int used_disks;
info->reshape_progress = blocks_per_unit * units;
- /* checkpoint is written per disks unit
- * recalculate it to reshape position
- */
- used_disks = imsm_num_data_members(dev, 0);
- info->reshape_progress *= used_disks;
dprintf("IMSM: General Migration checkpoint : %llu "
"(%llu) -> read reshape progress : %llu\n",
units, blocks_per_unit, info->reshape_progress);
getinfo_super_imsm_volume(st, info, map);
return;
}
+ memset(info, 0, sizeof(*info));
/* Set raid_disks to zero so that Assemble will always pull in valid
* spares
* map1state=normal)
* 4/ Rebuild (migr_state=1 migr_type=MIGR_REBUILD map0state=normal
* map1state=degraded)
+ * 5/ Migration (mig_state=1 migr_type=MIGR_GEN_MIGR map0state=normal
+ * map1state=normal)
*/
-static void migrate(struct imsm_dev *dev, __u8 to_state, int migr_type)
+static void migrate(struct imsm_dev *dev, struct intel_super *super,
+ __u8 to_state, int migr_type)
{
struct imsm_map *dest;
struct imsm_map *src = get_imsm_map(dev, 0);
}
}
+ if (migr_type == MIGR_GEN_MIGR)
+ /* Clear migration record */
+ memset(super->migr_rec, 0, sizeof(struct migr_record));
+
src->map_state = to_state;
}
return ptr;
}
+/*******************************************************************************
+ * Function: check_mpb_migr_compatibility
+ * Description: Function checks for unsupported migration features:
+ * - migration optimization area (pba_of_lba0)
+ * - descending reshape (ascending_migr)
+ * Parameters:
+ * super : imsm metadata information
+ * Returns:
+ * 0 : migration is compatible
+ * -1 : migration is not compatible
+ ******************************************************************************/
+int check_mpb_migr_compatibility(struct intel_super *super)
+{
+ struct imsm_map *map0, *map1;
+ struct migr_record *migr_rec = super->migr_rec;
+ int i;
+
+ for (i = 0; i < super->anchor->num_raid_devs; i++) {
+ struct imsm_dev *dev_iter = __get_imsm_dev(super->anchor, i);
+
+ if (dev_iter &&
+ dev_iter->vol.migr_state == 1 &&
+ dev_iter->vol.migr_type == MIGR_GEN_MIGR) {
+ /* This device is migrating */
+ map0 = get_imsm_map(dev_iter, 0);
+ map1 = get_imsm_map(dev_iter, 1);
+ if (map0->pba_of_lba0 != map1->pba_of_lba0)
+ /* migration optimization area was used */
+ return -1;
+ if (migr_rec->ascending_migr == 0
+ && migr_rec->dest_depth_per_unit > 0)
+ /* descending reshape not supported yet */
+ return -1;
+ }
+ }
+ return 0;
+}
+
static void __free_imsm(struct intel_super *super, int free_disks);
/* load_imsm_mpb - read matrix metadata
sectors = mpb_sectors(anchor) - 1;
free(anchor);
+
+ if (posix_memalign(&super->migr_rec_buf, 512, 512) != 0) {
+ fprintf(stderr, Name
+ ": %s could not allocate migr_rec buffer\n", __func__);
+ free(super->buf);
+ return 2;
+ }
+
if (!sectors) {
check_sum = __gen_imsm_checksum(super->anchor);
if (check_sum != __le32_to_cpu(super->anchor->check_sum)) {
return 0;
}
+static int read_imsm_migr_rec(int fd, struct intel_super *super);
+
static int
load_and_parse_mpb(int fd, struct intel_super *super, char *devname, int keep_fd)
{
}
/* unlink capability description */
super->orom = NULL;
+ if (super->migr_rec_buf) {
+ free(super->migr_rec_buf);
+ super->migr_rec_buf = NULL;
+ }
if (free_disks)
free_imsm_disks(super);
free_devlist(super);
err = 2;
goto error;
}
+
+ /* load migration record */
+ err = load_imsm_migr_rec(super, NULL);
+ if (err) {
+ err = 4;
+ goto error;
+ }
+
+ /* Check migration compatibility */
+ if (check_mpb_migr_compatibility(super) != 0) {
+ fprintf(stderr, Name ": Unsupported migration detected");
+ if (devname)
+ fprintf(stderr, " on %s\n", devname);
+ else
+ fprintf(stderr, " (IMSM).\n");
+
+ err = 5;
+ goto error;
+ }
+
err = 0;
error:
st->minor_version = 0;
st->max_devs = IMSM_MAX_DEVICES;
}
+
+ /* load migration record */
+ load_imsm_migr_rec(super, NULL);
+
+ /* Check for unsupported migration features */
+ if (check_mpb_migr_compatibility(super) != 0) {
+ fprintf(stderr, Name ": Unsupported migration detected");
+ if (devname)
+ fprintf(stderr, " on %s\n", devname);
+ else
+ fprintf(stderr, " (IMSM).\n");
+ return 3;
+ }
+
return 0;
}
fprintf(stderr, Name": could not allocate new mpb\n");
return 0;
}
+ if (posix_memalign(&super->migr_rec_buf, 512, 512) != 0) {
+ fprintf(stderr, Name
+ ": %s could not allocate migr_rec buffer\n",
+ __func__);
+ free(super->buf);
+ free(super);
+ return 0;
+ }
memcpy(mpb_new, mpb, size_old);
free(mpb);
mpb = mpb_new;
": %s could not allocate superblock\n", __func__);
return 0;
}
+ if (posix_memalign(&super->migr_rec_buf, 512, 512) != 0) {
+ fprintf(stderr, Name
+ ": %s could not allocate migr_rec buffer\n", __func__);
+ free(super->buf);
+ free(super);
+ return 0;
+ }
memset(super->buf, 0, mpb_size);
mpb = super->buf;
mpb->mpb_size = __cpu_to_le32(mpb_size);
return 0;
}
+static int is_gen_migration(struct imsm_dev *dev);
+
static int write_super_imsm(struct supertype *st, int doclose)
{
struct intel_super *super = st->sb;
int i;
__u32 mpb_size = sizeof(struct imsm_super) - sizeof(struct imsm_disk);
int num_disks = 0;
+ int clear_migration_record = 1;
/* 'generation' is incremented everytime the metadata is written */
generation = __le32_to_cpu(mpb->generation_num);
imsm_copy_dev(dev, dev2);
mpb_size += sizeof_imsm_dev(dev, 0);
}
+ if (is_gen_migration(dev2))
+ clear_migration_record = 0;
}
mpb_size += __le32_to_cpu(mpb->bbm_log_size);
mpb->mpb_size = __cpu_to_le32(mpb_size);
sum = __gen_imsm_checksum(mpb);
mpb->check_sum = __cpu_to_le32(sum);
+ if (clear_migration_record)
+ memset(super->migr_rec_buf, 0, 512);
+
/* write the mpb for disks that compose raid devices */
for (d = super->disks; d ; d = d->next) {
if (d->index < 0)
if (store_imsm_mpb(d->fd, mpb))
fprintf(stderr, "%s: failed for device %d:%d %s\n",
__func__, d->major, d->minor, strerror(errno));
+ if (clear_migration_record) {
+ unsigned long long dsize;
+
+ get_dev_size(d->fd, NULL, &dsize);
+ if (lseek64(d->fd, dsize - 512, SEEK_SET) >= 0) {
+ write(d->fd, super->migr_rec_buf, 512);
+ }
+ }
if (doclose) {
close(d->fd);
d->fd = -1;
return 0;
}
-static void update_recovery_start(struct imsm_dev *dev, struct mdinfo *array)
+static void update_recovery_start(struct intel_super *super,
+ struct imsm_dev *dev,
+ struct mdinfo *array)
{
struct mdinfo *rebuild = NULL;
struct mdinfo *d;
}
units = __le32_to_cpu(dev->vol.curr_migr_unit);
- rebuild->recovery_start = units * blocks_per_migr_unit(dev);
+ rebuild->recovery_start = units * blocks_per_migr_unit(super, dev);
}
+static int recover_backup_imsm(struct supertype *st, struct mdinfo *info);
static struct mdinfo *container_content_imsm(struct supertype *st, char *subarray)
{
info_d->component_size = __le32_to_cpu(map->blocks_per_member);
}
/* now that the disk list is up-to-date fixup recovery_start */
- update_recovery_start(dev, this);
+ update_recovery_start(super, dev, this);
this->array.spare_disks += spare_disks;
+
+ /* check for reshape */
+ if (this->reshape_active == 1)
+ recover_backup_imsm(st, this);
+
rest = this;
}
/* 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);
+ migrate(dev, super, IMSM_T_STATE_NORMAL, MIGR_INIT);
else
- migrate(dev, IMSM_T_STATE_NORMAL, MIGR_REPAIR);
+ migrate(dev, super, IMSM_T_STATE_NORMAL, MIGR_REPAIR);
super->updates_pending++;
}
mark_checkpoint:
+ /* skip checkpointing for general migration,
+ * it is controlled in mdadm
+ */
+ if (is_gen_migration(dev))
+ goto skip_mark_checkpoint;
+
/* check if we can update curr_migr_unit from resync_start, recovery_start */
- blocks_per_unit = blocks_per_migr_unit(dev);
+ blocks_per_unit = blocks_per_migr_unit(super, dev);
if (blocks_per_unit) {
__u32 units32;
__u64 units;
}
}
+skip_mark_checkpoint:
/* mark dirty / clean */
if (dev->vol.dirty != !consistent) {
dprintf("imsm: mark '%s'\n", consistent ? "clean" : "dirty");
return check_degraded;
}
+
+static int apply_reshape_migration_update(struct imsm_update_reshape_migration *u,
+ struct intel_super *super,
+ void ***space_list)
+{
+ struct intel_dev *id;
+ void **tofree = NULL;
+ int ret_val = 0;
+
+ dprintf("apply_reshape_migration_update()\n");
+ if ((u->subdev < 0) ||
+ (u->subdev > 1)) {
+ dprintf("imsm: Error: Wrong subdev: %i\n", u->subdev);
+ return ret_val;
+ }
+ if ((space_list == NULL) || (*space_list == NULL)) {
+ dprintf("imsm: Error: Memory is not allocated\n");
+ return ret_val;
+ }
+
+ for (id = super->devlist ; id; id = id->next) {
+ if (id->index == (unsigned)u->subdev) {
+ struct imsm_dev *dev = get_imsm_dev(super, u->subdev);
+ struct imsm_map *map;
+ struct imsm_dev *new_dev =
+ (struct imsm_dev *)*space_list;
+ struct imsm_map *migr_map = get_imsm_map(dev, 1);
+ int to_state;
+ struct dl *new_disk;
+
+ if (new_dev == NULL)
+ return ret_val;
+ *space_list = **space_list;
+ memcpy(new_dev, dev, sizeof_imsm_dev(dev, 0));
+ map = get_imsm_map(new_dev, 0);
+ if (migr_map) {
+ dprintf("imsm: Error: migration in progress");
+ return ret_val;
+ }
+
+ to_state = map->map_state;
+ if ((u->new_level == 5) && (map->raid_level == 0)) {
+ map->num_members++;
+ /* this should not happen */
+ if (u->new_disks[0] < 0) {
+ map->failed_disk_num =
+ map->num_members - 1;
+ to_state = IMSM_T_STATE_DEGRADED;
+ } else
+ to_state = IMSM_T_STATE_NORMAL;
+ }
+ migrate(new_dev, super, to_state, MIGR_GEN_MIGR);
+ if (u->new_level > -1)
+ map->raid_level = u->new_level;
+ migr_map = get_imsm_map(new_dev, 1);
+ if ((u->new_level == 5) &&
+ (migr_map->raid_level == 0)) {
+ int ord = map->num_members - 1;
+ migr_map->num_members--;
+ if (u->new_disks[0] < 0)
+ ord |= IMSM_ORD_REBUILD;
+ set_imsm_ord_tbl_ent(map,
+ map->num_members - 1,
+ ord);
+ }
+ id->dev = new_dev;
+ tofree = (void **)dev;
+
+ /* update chunk size
+ */
+ if (u->new_chunksize > 0)
+ map->blocks_per_strip =
+ __cpu_to_le16(u->new_chunksize * 2);
+
+ /* add disk
+ */
+ if ((u->new_level != 5) ||
+ (migr_map->raid_level != 0) ||
+ (migr_map->raid_level == map->raid_level))
+ goto skip_disk_add;
+
+ if (u->new_disks[0] >= 0) {
+ /* use passes spare
+ */
+ new_disk = get_disk_super(super,
+ major(u->new_disks[0]),
+ minor(u->new_disks[0]));
+ dprintf("imsm: new disk for reshape is: %i:%i "
+ "(%p, index = %i)\n",
+ major(u->new_disks[0]),
+ minor(u->new_disks[0]),
+ new_disk, new_disk->index);
+ if (new_disk == NULL)
+ goto error_disk_add;
+
+ new_disk->index = map->num_members - 1;
+ /* slot to fill in autolayout
+ */
+ new_disk->raiddisk = new_disk->index;
+ new_disk->disk.status |= CONFIGURED_DISK;
+ new_disk->disk.status &= ~SPARE_DISK;
+ } else
+ goto error_disk_add;
+
+skip_disk_add:
+ *tofree = *space_list;
+ /* calculate new size
+ */
+ imsm_set_array_size(new_dev);
+
+ ret_val = 1;
+ }
+ }
+
+ if (tofree)
+ *space_list = tofree;
+ return ret_val;
+
+error_disk_add:
+ dprintf("Error: imsm: Cannot find disk.\n");
+ return ret_val;
+}
+
+
static int apply_reshape_container_disks_update(struct imsm_update_reshape *u,
struct intel_super *super,
void ***space_list)
id->dev = newdev;
*sp = tofree;
tofree = sp;
+
+ /* Clear migration record */
+ memset(super->migr_rec, 0, sizeof(struct migr_record));
}
if (tofree)
*space_list = tofree;
break;
}
case update_reshape_migration: {
+ struct imsm_update_reshape_migration *u = (void *)update->buf;
+ if (apply_reshape_migration_update(
+ u, super, &update->space_list))
+ super->updates_pending++;
break;
}
case update_activate_spare: {
}
super->updates_pending++;
-
/* count failures (excluding rebuilds and the victim)
* to determine map[0] state
*/
/* mark rebuild */
to_state = imsm_check_degraded(super, dev, failed);
map->map_state = IMSM_T_STATE_DEGRADED;
- migrate(dev, to_state, MIGR_REBUILD);
+ migrate(dev, super, 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);
}
}
+/*******************************************************************************
+ * Function: open_backup_targets
+ * Description: Function opens file descriptors for all devices given in
+ * info->devs
+ * Parameters:
+ * info : general array info
+ * raid_disks : number of disks
+ * raid_fds : table of device's file descriptors
+ * Returns:
+ * 0 : success
+ * -1 : fail
+ ******************************************************************************/
+int open_backup_targets(struct mdinfo *info, int raid_disks, int *raid_fds)
+{
+ struct mdinfo *sd;
+
+ for (sd = info->devs ; sd ; sd = sd->next) {
+ char *dn;
+
+ if (sd->disk.state & (1<<MD_DISK_FAULTY)) {
+ dprintf("disk is faulty!!\n");
+ continue;
+ }
+
+ if ((sd->disk.raid_disk >= raid_disks) ||
+ (sd->disk.raid_disk < 0))
+ continue;
+
+ dn = map_dev(sd->disk.major,
+ sd->disk.minor, 1);
+ raid_fds[sd->disk.raid_disk] = dev_open(dn, O_RDWR);
+ if (raid_fds[sd->disk.raid_disk] < 0) {
+ fprintf(stderr, "cannot open component\n");
+ return -1;
+ }
+ }
+ return 0;
+}
+
+/*******************************************************************************
+ * Function: init_migr_record_imsm
+ * Description: Function inits imsm migration record
+ * Parameters:
+ * super : imsm internal array info
+ * dev : device under migration
+ * info : general array info to find the smallest device
+ * Returns:
+ * none
+ ******************************************************************************/
+void init_migr_record_imsm(struct supertype *st, struct imsm_dev *dev,
+ struct mdinfo *info)
+{
+ struct intel_super *super = st->sb;
+ struct migr_record *migr_rec = super->migr_rec;
+ int new_data_disks;
+ unsigned long long dsize, dev_sectors;
+ long long unsigned min_dev_sectors = -1LLU;
+ struct mdinfo *sd;
+ char nm[30];
+ int fd;
+ struct imsm_map *map_dest = get_imsm_map(dev, 0);
+ struct imsm_map *map_src = get_imsm_map(dev, 1);
+ unsigned long long num_migr_units;
+
+ unsigned long long array_blocks =
+ (((unsigned long long)__le32_to_cpu(dev->size_high)) << 32) +
+ __le32_to_cpu(dev->size_low);
+
+ memset(migr_rec, 0, sizeof(struct migr_record));
+ migr_rec->family_num = __cpu_to_le32(super->anchor->family_num);
+
+ /* only ascending reshape supported now */
+ migr_rec->ascending_migr = __cpu_to_le32(1);
+
+ migr_rec->dest_depth_per_unit = GEN_MIGR_AREA_SIZE /
+ max(map_dest->blocks_per_strip, map_src->blocks_per_strip);
+ migr_rec->dest_depth_per_unit *= map_dest->blocks_per_strip;
+ new_data_disks = imsm_num_data_members(dev, 0);
+ migr_rec->blocks_per_unit =
+ __cpu_to_le32(migr_rec->dest_depth_per_unit * new_data_disks);
+ migr_rec->dest_depth_per_unit =
+ __cpu_to_le32(migr_rec->dest_depth_per_unit);
+
+ num_migr_units =
+ array_blocks / __le32_to_cpu(migr_rec->blocks_per_unit);
+
+ if (array_blocks % __le32_to_cpu(migr_rec->blocks_per_unit))
+ num_migr_units++;
+ migr_rec->num_migr_units = __cpu_to_le32(num_migr_units);
+
+ migr_rec->post_migr_vol_cap = dev->size_low;
+ migr_rec->post_migr_vol_cap_hi = dev->size_high;
+
+
+ /* Find the smallest dev */
+ for (sd = info->devs ; sd ; sd = sd->next) {
+ sprintf(nm, "%d:%d", sd->disk.major, sd->disk.minor);
+ fd = dev_open(nm, O_RDONLY);
+ if (fd < 0)
+ continue;
+ get_dev_size(fd, NULL, &dsize);
+ dev_sectors = dsize / 512;
+ if (dev_sectors < min_dev_sectors)
+ min_dev_sectors = dev_sectors;
+ close(fd);
+ }
+ migr_rec->ckpt_area_pba = __cpu_to_le32(min_dev_sectors -
+ RAID_DISK_RESERVED_BLOCKS_IMSM_HI);
+
+ write_imsm_migr_rec(st);
+
+ return;
+}
+
+/*******************************************************************************
+ * Function: save_backup_imsm
+ * Description: Function saves critical data stripes to Migration Copy Area
+ * and updates the current migration unit status.
+ * Use restore_stripes() to form a destination stripe,
+ * and to write it to the Copy Area.
+ * Parameters:
+ * st : supertype information
+ * info : general array info
+ * buf : input buffer
+ * write_offset : address of data to backup
+ * length : length of data to backup (blocks_per_unit)
+ * Returns:
+ * 0 : success
+ *, -1 : fail
+ ******************************************************************************/
+int save_backup_imsm(struct supertype *st,
+ struct imsm_dev *dev,
+ struct mdinfo *info,
+ void *buf,
+ int new_data,
+ int length)
+{
+ int rv = -1;
+ struct intel_super *super = st->sb;
+ unsigned long long *target_offsets = NULL;
+ int *targets = NULL;
+ int i;
+ struct imsm_map *map_dest = get_imsm_map(dev, 0);
+ int new_disks = map_dest->num_members;
+
+ targets = malloc(new_disks * sizeof(int));
+ if (!targets)
+ goto abort;
+
+ target_offsets = malloc(new_disks * sizeof(unsigned long long));
+ if (!target_offsets)
+ goto abort;
+
+ for (i = 0; i < new_disks; i++) {
+ targets[i] = -1;
+ target_offsets[i] = (unsigned long long)
+ __le32_to_cpu(super->migr_rec->ckpt_area_pba) * 512;
+ }
+
+ if (open_backup_targets(info, new_disks, targets))
+ goto abort;
+
+ if (restore_stripes(targets, /* list of dest devices */
+ target_offsets, /* migration record offsets */
+ new_disks,
+ info->new_chunk,
+ info->new_level,
+ info->new_layout,
+ -1, /* source backup file descriptor */
+ 0, /* input buf offset
+ * always 0 buf is already offset */
+ 0,
+ length,
+ buf) != 0) {
+ fprintf(stderr, Name ": Error restoring stripes\n");
+ goto abort;
+ }
+
+ rv = 0;
+
+abort:
+ if (targets) {
+ for (i = 0; i < new_disks; i++)
+ if (targets[i] >= 0)
+ close(targets[i]);
+ free(targets);
+ }
+ free(target_offsets);
+
+ return rv;
+}
+
+/*******************************************************************************
+ * Function: save_checkpoint_imsm
+ * Description: Function called for current unit status update
+ * in the migration record. It writes it to disk.
+ * Parameters:
+ * super : imsm internal array info
+ * info : general array info
+ * Returns:
+ * 0: success
+ * 1: failure
+ ******************************************************************************/
+int save_checkpoint_imsm(struct supertype *st, struct mdinfo *info, int state)
+{
+ struct intel_super *super = st->sb;
+ load_imsm_migr_rec(super, info);
+ if (__le32_to_cpu(super->migr_rec->blocks_per_unit) == 0) {
+ dprintf("ERROR: blocks_per_unit = 0!!!\n");
+ return 1;
+ }
+
+ super->migr_rec->curr_migr_unit =
+ __cpu_to_le32(info->reshape_progress /
+ __le32_to_cpu(super->migr_rec->blocks_per_unit));
+ super->migr_rec->rec_status = __cpu_to_le32(state);
+ super->migr_rec->dest_1st_member_lba =
+ __cpu_to_le32((__le32_to_cpu(super->migr_rec->curr_migr_unit))
+ * __le32_to_cpu(super->migr_rec->dest_depth_per_unit));
+ if (write_imsm_migr_rec(st) < 0) {
+ dprintf("imsm: Cannot write migration record "
+ "outside backup area\n");
+ return 1;
+ }
+
+ return 0;
+}
+
+static __u64 blocks_per_migr_unit(struct intel_super *super,
+ struct imsm_dev *dev);
+
+/*******************************************************************************
+ * Function: recover_backup_imsm
+ * Description: Function recovers critical data from the Migration Copy Area
+ * while assembling an array.
+ * Parameters:
+ * super : imsm internal array info
+ * info : general array info
+ * Returns:
+ * 0 : success (or there is no data to recover)
+ * 1 : fail
+ ******************************************************************************/
+int recover_backup_imsm(struct supertype *st, struct mdinfo *info)
+{
+ struct intel_super *super = st->sb;
+ struct migr_record *migr_rec = super->migr_rec;
+ struct imsm_map *map_dest = NULL;
+ struct intel_dev *id = NULL;
+ unsigned long long read_offset;
+ unsigned long long write_offset;
+ unsigned unit_len;
+ int *targets = NULL;
+ int new_disks, i, err;
+ char *buf = NULL;
+ int retval = 1;
+ unsigned long curr_migr_unit = __le32_to_cpu(migr_rec->curr_migr_unit);
+ unsigned long num_migr_units = __le32_to_cpu(migr_rec->num_migr_units);
+ int ascending = __le32_to_cpu(migr_rec->ascending_migr);
+ char buffer[20];
+
+ err = sysfs_get_str(info, NULL, "array_state", (char *)buffer, 20);
+ if (err < 1)
+ return 1;
+
+ /* recover data only during assemblation */
+ if (strncmp(buffer, "inactive", 8) != 0)
+ return 0;
+ /* no data to recover */
+ if (__le32_to_cpu(migr_rec->rec_status) == UNIT_SRC_NORMAL)
+ return 0;
+ if (curr_migr_unit >= num_migr_units)
+ return 1;
+
+ /* find device during reshape */
+ for (id = super->devlist; id; id = id->next)
+ if (is_gen_migration(id->dev))
+ break;
+ if (id == NULL)
+ return 1;
+
+ map_dest = get_imsm_map(id->dev, 0);
+ new_disks = map_dest->num_members;
+
+ read_offset = (unsigned long long)
+ __le32_to_cpu(migr_rec->ckpt_area_pba) * 512;
+
+ write_offset = ((unsigned long long)
+ __le32_to_cpu(migr_rec->dest_1st_member_lba) +
+ info->data_offset) * 512;
+
+ unit_len = __le32_to_cpu(migr_rec->dest_depth_per_unit) * 512;
+ if (posix_memalign((void **)&buf, 512, unit_len) != 0)
+ goto abort;
+ targets = malloc(new_disks * sizeof(int));
+ if (!targets)
+ goto abort;
+
+ open_backup_targets(info, new_disks, targets);
+
+ for (i = 0; i < new_disks; i++) {
+ if (lseek64(targets[i], read_offset, SEEK_SET) < 0) {
+ fprintf(stderr,
+ Name ": Cannot seek to block: %s\n",
+ strerror(errno));
+ goto abort;
+ }
+ if (read(targets[i], buf, unit_len) != unit_len) {
+ fprintf(stderr,
+ Name ": Cannot read copy area block: %s\n",
+ strerror(errno));
+ goto abort;
+ }
+ if (lseek64(targets[i], write_offset, SEEK_SET) < 0) {
+ fprintf(stderr,
+ Name ": Cannot seek to block: %s\n",
+ strerror(errno));
+ goto abort;
+ }
+ if (write(targets[i], buf, unit_len) != unit_len) {
+ fprintf(stderr,
+ Name ": Cannot restore block: %s\n",
+ strerror(errno));
+ goto abort;
+ }
+ }
+
+ if (ascending && curr_migr_unit < (num_migr_units-1))
+ curr_migr_unit++;
+
+ migr_rec->curr_migr_unit = __le32_to_cpu(curr_migr_unit);
+ super->migr_rec->rec_status = __cpu_to_le32(UNIT_SRC_NORMAL);
+ if (write_imsm_migr_rec(st) == 0) {
+ __u64 blocks_per_unit = blocks_per_migr_unit(super, id->dev);
+ info->reshape_progress = curr_migr_unit * blocks_per_unit;
+ retval = 0;
+ }
+
+abort:
+ if (targets) {
+ for (i = 0; i < new_disks; i++)
+ if (targets[i])
+ close(targets[i]);
+ free(targets);
+ }
+ free(buf);
+ return retval;
+}
+
static char disk_by_path[] = "/dev/disk/by-path/";
static const char *imsm_get_disk_controller_domain(const char *path)
u->new_layout = geo->layout;
u->new_raid_disks = u->old_raid_disks = geo->raid_disks;
u->new_disks[0] = -1;
+ u->new_chunksize = -1;
dev = get_imsm_dev(super, u->subdev);
if (dev) {
struct imsm_map *map;
map = get_imsm_map(dev, 0);
- if (map)
+ if (map) {
+ int current_chunk_size =
+ __le16_to_cpu(map->blocks_per_strip) / 2;
+
+ if (geo->chunksize != current_chunk_size) {
+ u->new_chunksize = geo->chunksize / 1024;
+ dprintf("imsm: "
+ "chunk size change from %i to %i\n",
+ current_chunk_size, u->new_chunksize);
+ }
previous_level = map->raid_level;
+ }
}
if ((geo->level == 5) && (previous_level == 0)) {
struct mdinfo *spares = NULL;
return ret_val;
}
+/*******************************************************************************
+ * Function: wait_for_reshape_imsm
+ * Description: Function writes new sync_max value and waits until
+ * reshape process reach new position
+ * Parameters:
+ * sra : general array info
+ * to_complete : new sync_max position
+ * ndata : number of disks in new array's layout
+ * Returns:
+ * 0 : success,
+ * 1 : there is no reshape in progress,
+ * -1 : fail
+ ******************************************************************************/
+int wait_for_reshape_imsm(struct mdinfo *sra, unsigned long long to_complete,
+ int ndata)
+{
+ int fd = sysfs_get_fd(sra, NULL, "reshape_position");
+ unsigned long long completed;
+
+ struct timeval timeout;
+
+ if (fd < 0)
+ return 1;
+
+ sysfs_fd_get_ll(fd, &completed);
+
+ if (to_complete == 0) {/* reshape till the end of array */
+ sysfs_set_str(sra, NULL, "sync_max", "max");
+ to_complete = MaxSector;
+ } else {
+ if (completed > to_complete)
+ return -1;
+ if (sysfs_set_num(sra, NULL, "sync_max",
+ to_complete / ndata) != 0) {
+ close(fd);
+ return -1;
+ }
+ }
+
+ /* FIXME should not need a timeout at all */
+ timeout.tv_sec = 30;
+ timeout.tv_usec = 0;
+ do {
+ char action[20];
+ fd_set rfds;
+ FD_ZERO(&rfds);
+ FD_SET(fd, &rfds);
+ select(fd+1, NULL, NULL, &rfds, &timeout);
+ if (sysfs_fd_get_ll(fd, &completed) < 0) {
+ close(fd);
+ return 1;
+ }
+ if (sysfs_get_str(sra, NULL, "sync_action",
+ action, 20) > 0 &&
+ strncmp(action, "reshape", 7) != 0)
+ break;
+ } while (completed < to_complete);
+ close(fd);
+ return 0;
+
+}
+
+/*******************************************************************************
+ * Function: check_degradation_change
+ * Description: Check that array hasn't become failed.
+ * Parameters:
+ * info : for sysfs access
+ * sources : source disks descriptors
+ * degraded: previous degradation level
+ * Returns:
+ * degradation level
+ ******************************************************************************/
+int check_degradation_change(struct mdinfo *info,
+ int *sources,
+ int degraded)
+{
+ unsigned long long new_degraded;
+ sysfs_get_ll(info, NULL, "degraded", &new_degraded);
+ if (new_degraded != (unsigned long long)degraded) {
+ /* check each device to ensure it is still working */
+ struct mdinfo *sd;
+ new_degraded = 0;
+ for (sd = info->devs ; sd ; sd = sd->next) {
+ if (sd->disk.state & (1<<MD_DISK_FAULTY))
+ continue;
+ if (sd->disk.state & (1<<MD_DISK_SYNC)) {
+ char sbuf[20];
+ if (sysfs_get_str(info,
+ sd, "state", sbuf, 20) < 0 ||
+ strstr(sbuf, "faulty") ||
+ strstr(sbuf, "in_sync") == NULL) {
+ /* this device is dead */
+ sd->disk.state = (1<<MD_DISK_FAULTY);
+ if (sd->disk.raid_disk >= 0 &&
+ sources[sd->disk.raid_disk] >= 0) {
+ close(sources[
+ sd->disk.raid_disk]);
+ sources[sd->disk.raid_disk] =
+ -1;
+ }
+ new_degraded++;
+ }
+ }
+ }
+ }
+
+ return new_degraded;
+}
+
+/*******************************************************************************
+ * Function: imsm_manage_reshape
+ * Description: Function finds array under reshape and it manages reshape
+ * process. It creates stripes backups (if required) and sets
+ * checheckpoits.
+ * Parameters:
+ * afd : Backup handle (nattive) - not used
+ * sra : general array info
+ * reshape : reshape parameters - not used
+ * st : supertype structure
+ * blocks : size of critical section [blocks]
+ * fds : table of source device descriptor
+ * offsets : start of array (offest per devices)
+ * dests : not used
+ * destfd : table of destination device descriptor
+ * destoffsets : table of destination offsets (per device)
+ * Returns:
+ * 1 : success, reshape is done
+ * 0 : fail
+ ******************************************************************************/
static int imsm_manage_reshape(
int afd, struct mdinfo *sra, struct reshape *reshape,
- struct supertype *st, unsigned long stripes,
+ struct supertype *st, unsigned long backup_blocks,
int *fds, unsigned long long *offsets,
int dests, int *destfd, unsigned long long *destoffsets)
{
- /* Just use child_monitor for now */
- return child_monitor(
- afd, sra, reshape, st, stripes,
- fds, offsets, dests, destfd, destoffsets);
+ int ret_val = 0;
+ struct intel_super *super = st->sb;
+ struct intel_dev *dv = NULL;
+ struct imsm_dev *dev = NULL;
+ struct imsm_map *map_src, *map_dest;
+ int migr_vol_qan = 0;
+ int ndata, odata; /* [bytes] */
+ int chunk; /* [bytes] */
+ struct migr_record *migr_rec;
+ char *buf = NULL;
+ unsigned int buf_size; /* [bytes] */
+ unsigned long long max_position; /* array size [bytes] */
+ unsigned long long next_step; /* [blocks]/[bytes] */
+ unsigned long long old_data_stripe_length;
+ unsigned long long new_data_stripe_length;
+ unsigned long long start_src; /* [bytes] */
+ unsigned long long start; /* [bytes] */
+ unsigned long long start_buf_shift; /* [bytes] */
+ int degraded = 0;
+
+ if (!fds || !offsets || !destfd || !destoffsets || !sra)
+ goto abort;
+
+ /* Find volume during the reshape */
+ for (dv = super->devlist; dv; dv = dv->next) {
+ if (dv->dev->vol.migr_type == MIGR_GEN_MIGR
+ && dv->dev->vol.migr_state == 1) {
+ dev = dv->dev;
+ migr_vol_qan++;
+ }
+ }
+ /* Only one volume can migrate at the same time */
+ if (migr_vol_qan != 1) {
+ fprintf(stderr, Name " : %s", migr_vol_qan ?
+ "Number of migrating volumes greater than 1\n" :
+ "There is no volume during migrationg\n");
+ goto abort;
+ }
+
+ map_src = get_imsm_map(dev, 1);
+ if (map_src == NULL)
+ goto abort;
+ map_dest = get_imsm_map(dev, 0);
+
+ ndata = imsm_num_data_members(dev, 0);
+ odata = imsm_num_data_members(dev, 1);
+
+ chunk = map_src->blocks_per_strip * 512;
+ old_data_stripe_length = odata * chunk;
+
+ migr_rec = super->migr_rec;
+
+ /* [bytes] */
+ sra->new_chunk = __le16_to_cpu(map_dest->blocks_per_strip) * 512;
+ sra->new_level = map_dest->raid_level;
+ new_data_stripe_length = sra->new_chunk * ndata;
+
+ /* initialize migration record for start condition */
+ if (sra->reshape_progress == 0)
+ init_migr_record_imsm(st, dev, sra);
+
+ /* size for data */
+ buf_size = __le32_to_cpu(migr_rec->blocks_per_unit) * 512;
+ /* extend buffer size for parity disk */
+ buf_size += __le32_to_cpu(migr_rec->dest_depth_per_unit) * 512;
+ /* add space for stripe aligment */
+ buf_size += old_data_stripe_length;
+ if (posix_memalign((void **)&buf, 4096, buf_size)) {
+ dprintf("imsm: Cannot allocate checpoint buffer\n");
+ goto abort;
+ }
+
+ max_position =
+ __le32_to_cpu(migr_rec->post_migr_vol_cap) +
+ ((unsigned long long)__le32_to_cpu(
+ migr_rec->post_migr_vol_cap_hi) << 32);
+
+ while (__le32_to_cpu(migr_rec->curr_migr_unit) <
+ __le32_to_cpu(migr_rec->num_migr_units)) {
+ /* current reshape position [blocks] */
+ unsigned long long current_position =
+ __le32_to_cpu(migr_rec->blocks_per_unit)
+ * __le32_to_cpu(migr_rec->curr_migr_unit);
+ unsigned long long border;
+
+ /* Check that array hasn't become failed.
+ */
+ degraded = check_degradation_change(sra, fds, degraded);
+ if (degraded > 1) {
+ dprintf("imsm: Abort reshape due to degradation"
+ " level (%i)\n", degraded);
+ goto abort;
+ }
+
+ next_step = __le32_to_cpu(migr_rec->blocks_per_unit);
+
+ if ((current_position + next_step) > max_position)
+ next_step = max_position - current_position;
+
+ start = (map_src->pba_of_lba0 + dev->reserved_blocks +
+ current_position) * 512;
+
+ /* allign reading start to old geometry */
+ start_buf_shift = start % old_data_stripe_length;
+ start_src = start - start_buf_shift;
+
+ border = (start_src / odata) - (start / ndata);
+ border /= 512;
+ if (border <= __le32_to_cpu(migr_rec->dest_depth_per_unit)) {
+ /* save critical stripes to buf
+ * start - start address of current unit
+ * to backup [bytes]
+ * start_src - start address of current unit
+ * to backup alligned to source array
+ * [bytes]
+ */
+ unsigned long long next_step_filler = 0;
+ unsigned long long copy_length = next_step * 512;
+
+ /* allign copy area length to stripe in old geometry */
+ next_step_filler = ((copy_length + start_buf_shift)
+ % old_data_stripe_length);
+ if (next_step_filler)
+ next_step_filler = (old_data_stripe_length
+ - next_step_filler);
+ dprintf("save_stripes() parameters: start = %llu,"
+ "\tstart_src = %llu,\tnext_step*512 = %llu,"
+ "\tstart_in_buf_shift = %llu,"
+ "\tnext_step_filler = %llu\n",
+ start, start_src, copy_length,
+ start_buf_shift, next_step_filler);
+
+ if (save_stripes(fds, offsets, map_src->num_members,
+ chunk, sra->array.level,
+ sra->array.layout, 0, NULL, start_src,
+ copy_length +
+ next_step_filler + start_buf_shift,
+ buf)) {
+ dprintf("imsm: Cannot save stripes"
+ " to buffer\n");
+ goto abort;
+ }
+ /* Convert data to destination format and store it
+ * in backup general migration area
+ */
+ if (save_backup_imsm(st, dev, sra,
+ buf + start_buf_shift,
+ ndata, copy_length)) {
+ dprintf("imsm: Cannot save stripes to "
+ "target devices\n");
+ goto abort;
+ }
+ if (save_checkpoint_imsm(st, sra,
+ UNIT_SRC_IN_CP_AREA)) {
+ dprintf("imsm: Cannot write checkpoint to "
+ "migration record (UNIT_SRC_IN_CP_AREA)\n");
+ goto abort;
+ }
+ /* decrease backup_blocks */
+ if (backup_blocks > (unsigned long)next_step)
+ backup_blocks -= next_step;
+ else
+ backup_blocks = 0;
+ }
+ /* When data backed up, checkpoint stored,
+ * kick the kernel to reshape unit of data
+ */
+ next_step = next_step + sra->reshape_progress;
+ sysfs_set_num(sra, NULL, "suspend_lo", sra->reshape_progress);
+ sysfs_set_num(sra, NULL, "suspend_hi", next_step);
+
+ /* wait until reshape finish */
+ if (wait_for_reshape_imsm(sra, next_step, ndata) < 0) {
+ dprintf("wait_for_reshape_imsm returned error!\n");
+ goto abort;
+ }
+
+ sra->reshape_progress = next_step;
+
+ if (save_checkpoint_imsm(st, sra, UNIT_SRC_NORMAL)) {
+ dprintf("imsm: Cannot write checkpoint to "
+ "migration record (UNIT_SRC_NORMAL)\n");
+ goto abort;
+ }
+
+ }
+
+ /* return '1' if done */
+ ret_val = 1;
+abort:
+ free(buf);
+ abort_reshape(sra);
+
+ return ret_val;
}
#endif /* MDASSEMBLE */
.match_metadata_desc = match_metadata_desc_imsm,
.container_content = container_content_imsm,
+ .recover_backup = recover_backup_imsm,
+
.external = 1,
.name = "imsm",
projects / thirdparty / mdadm.git / blobdiff