__u32 filler[IMSM_DISK_FILLERS]; /* 0xF4 - 0x107 MPB_DISK_FILLERS for future expansion */
};
+/* map selector for map managment
+ */
+#define MAP_0 2
+#define MAP_1 4
+
/* RAID map configuration infos. */
struct imsm_map {
__u32 pba_of_lba0; /* start address of partition */
{
/* A device can have 2 maps if it is in the middle of a migration.
* If second_map is:
- * 0 - we return the first map
- * 1 - we return the second map if it exists, else NULL
+ * MAP_0 or 0 - we return the first map
+ * MAP_1 or 1 - we return the second map if it exists, else NULL
* -1 - we return the second map if it exists, else the first
- * -2 - we return longer map /excluding uninitialized state/
*/
struct imsm_map *map = &dev->vol.map[0];
struct imsm_map *map2 = NULL;
map2 = (void *)map + sizeof_imsm_map(map);
switch (second_map) {
+ case MAP_0:
case 0:
break;
+ case MAP_1:
case 1:
map = map2;
break;
if (map2)
map = map2;
break;
- case -2:
- if (map2
- && map2->map_state != IMSM_T_STATE_UNINITIALIZED
- && map2->num_members > map->num_members)
- map = map2;
- break;
default:
map = NULL;
}
return rv * 512;
}
+static int is_gen_migration(struct imsm_dev *dev);
+
#ifndef MDASSEMBLE
static __u64 blocks_per_migr_unit(struct intel_super *super,
struct imsm_dev *dev);
-static int is_gen_migration(struct imsm_dev *dev);
-
static void print_imsm_dev(struct intel_super *super,
struct imsm_dev *dev,
char *uuid,
}
}
-static __u8 imsm_check_degraded(struct intel_super *super, struct imsm_dev *dev, int failed);
-static int imsm_count_failed(struct intel_super *super, struct imsm_dev *dev);
+static __u8 imsm_check_degraded(struct intel_super *super, struct imsm_dev *dev,
+ int failed, int look_in_map);
+
+static int imsm_count_failed(struct intel_super *super, struct imsm_dev *dev,
+ int look_in_map);
+
+static void manage_second_map(struct intel_super *super, struct imsm_dev *dev)
+{
+ if (is_gen_migration(dev)) {
+ int failed;
+ __u8 map_state;
+ struct imsm_map *map2 = get_imsm_map(dev, MAP_1);
+
+ failed = imsm_count_failed(super, dev, MAP_1);
+ map_state = imsm_check_degraded(super, dev, failed,
+ MAP_1);
+ if (map2->map_state != map_state) {
+ map2->map_state = map_state;
+ super->updates_pending++;
+ }
+ }
+}
static struct imsm_disk *get_imsm_missing(struct intel_super *super, __u8 index)
{
struct imsm_map *map;
__u8 state;
- failed = imsm_count_failed(super, dev);
- state = imsm_check_degraded(super, dev, failed);
+ failed = imsm_count_failed(super, dev, MAP_0);
+ state = imsm_check_degraded(super, dev, failed, MAP_0);
map = get_imsm_map(dev, 0);
/* any newly missing disks?
src->map_state = to_state;
}
-static void end_migration(struct imsm_dev *dev, __u8 map_state)
+static void end_migration(struct imsm_dev *dev, struct intel_super *super,
+ __u8 map_state)
{
struct imsm_map *map = get_imsm_map(dev, 0);
struct imsm_map *prev = get_imsm_map(dev, dev->vol.migr_state);
*
* FIXME add support for raid-level-migration
*/
- for (i = 0; i < prev->num_members; i++)
- for (j = 0; j < map->num_members; j++)
- /* during online capacity expansion
- * disks position can be changed if takeover is used
- */
- if (ord_to_idx(map->disk_ord_tbl[j]) ==
- ord_to_idx(prev->disk_ord_tbl[i])) {
- map->disk_ord_tbl[j] |= prev->disk_ord_tbl[i];
- break;
- }
+ if ((map_state != map->map_state) && (is_gen_migration(dev) == 0) &&
+ (prev->map_state != IMSM_T_STATE_UNINITIALIZED)) {
+ /* when final map state is other than expected
+ * merge maps (not for migration)
+ */
+ int failed;
+
+ for (i = 0; i < prev->num_members; i++)
+ for (j = 0; j < map->num_members; j++)
+ /* during online capacity expansion
+ * disks position can be changed
+ * if takeover is used
+ */
+ if (ord_to_idx(map->disk_ord_tbl[j]) ==
+ ord_to_idx(prev->disk_ord_tbl[i])) {
+ map->disk_ord_tbl[j] |=
+ prev->disk_ord_tbl[i];
+ break;
+ }
+ failed = imsm_count_failed(super, dev, MAP_0);
+ map_state = imsm_check_degraded(super, dev, failed, MAP_0);
+ }
dev->vol.migr_state = 0;
set_migr_type(dev, 0);
map->blocks_per_member = __cpu_to_le32(info_to_blocks_per_member(info));
map->blocks_per_strip = __cpu_to_le16(info_to_blocks_per_strip(info));
map->failed_disk_num = ~0;
- map->map_state = info->failed_disks ? IMSM_T_STATE_DEGRADED : IMSM_T_STATE_NORMAL;
+ if (info->level > 0)
+ map->map_state = IMSM_T_STATE_UNINITIALIZED;
+ else
+ map->map_state = info->failed_disks ? IMSM_T_STATE_FAILED :
+ IMSM_T_STATE_NORMAL;
map->ddf = 1;
if (info->level == 1 && info->raid_disks > 2) {
set_imsm_ord_tbl_ent(map, slot, df->index | IMSM_ORD_REBUILD);
if (is_gen_migration(dev)) {
struct imsm_map *map2 = get_imsm_map(dev, 1);
- if (slot < map2->num_members) {
+ int slot2 = get_imsm_disk_slot(map2, df->index);
+ if ((slot2 < map2->num_members) &&
+ (slot2 >= 0)) {
__u32 ord2 = get_imsm_ord_tbl_ent(dev,
- slot,
+ slot2,
1);
if ((unsigned)df->index ==
ord_to_idx(ord2))
set_imsm_ord_tbl_ent(map2,
- slot,
+ slot2,
df->index |
IMSM_ORD_REBUILD);
}
return 0;
}
+#endif /* MDASSEMBLE */
static int is_gen_migration(struct imsm_dev *dev)
{
return 0;
}
-#endif /* MDASSEMBLE */
static int is_rebuilding(struct imsm_dev *dev)
{
return 0;
}
+static int is_initializing(struct imsm_dev *dev)
+{
+ struct imsm_map *migr_map;
+
+ if (!dev->vol.migr_state)
+ return 0;
+
+ if (migr_type(dev) != MIGR_INIT)
+ return 0;
+
+ migr_map = get_imsm_map(dev, 1);
+
+ if (migr_map->map_state == IMSM_T_STATE_UNINITIALIZED)
+ return 1;
+
+ return 0;
+
+}
+
static void update_recovery_start(struct intel_super *super,
struct imsm_dev *dev,
struct mdinfo *array)
}
-static __u8 imsm_check_degraded(struct intel_super *super, struct imsm_dev *dev, int failed)
+static __u8 imsm_check_degraded(struct intel_super *super, struct imsm_dev *dev,
+ int failed, int look_in_map)
{
- struct imsm_map *map = get_imsm_map(dev, 0);
+ struct imsm_map *map;
+
+ map = get_imsm_map(dev, look_in_map);
if (!failed)
return map->map_state == IMSM_T_STATE_UNINITIALIZED ?
return map->map_state;
}
-static int imsm_count_failed(struct intel_super *super, struct imsm_dev *dev)
+static int imsm_count_failed(struct intel_super *super, struct imsm_dev *dev,
+ int look_in_map)
{
int i;
int failed = 0;
struct imsm_disk *disk;
- struct imsm_map *map = get_imsm_map(dev, 0);
- struct imsm_map *prev = get_imsm_map(dev, dev->vol.migr_state);
+ struct imsm_map *map = get_imsm_map(dev, MAP_0);
+ struct imsm_map *prev = get_imsm_map(dev, MAP_1);
struct imsm_map *map_for_loop;
__u32 ord;
int idx;
+ int idx_1;
/* at the beginning of migration we set IMSM_ORD_REBUILD on
* disks that are being rebuilt. New failures are recorded to
* see if any failures are still present, or if any new ones
* have arrived
*/
- map_for_loop = prev;
- if (is_gen_migration(dev))
- if (prev && (map->num_members > prev->num_members))
- map_for_loop = map;
+ map_for_loop = map;
+ if (prev && (map->num_members < prev->num_members))
+ map_for_loop = prev;
for (i = 0; i < map_for_loop->num_members; i++) {
- ord = 0;
- if (i < prev->num_members)
- ord |= __le32_to_cpu(prev->disk_ord_tbl[i]);
- if (i < map->num_members)
- ord |= __le32_to_cpu(map->disk_ord_tbl[i]);
- idx = ord_to_idx(ord);
+ idx_1 = -255;
+ if (prev &&
+ (look_in_map & MAP_1) && (i < prev->num_members)) {
+ ord = __le32_to_cpu(prev->disk_ord_tbl[i]);
+ idx_1 = ord_to_idx(ord);
- disk = get_imsm_disk(super, idx);
- if (!disk || is_failed(disk) || ord & IMSM_ORD_REBUILD)
- failed++;
+ disk = get_imsm_disk(super, idx_1);
+ if (!disk || is_failed(disk) || ord & IMSM_ORD_REBUILD)
+ failed++;
+ }
+ if ((look_in_map & MAP_0) && (i < map->num_members)) {
+ ord = __le32_to_cpu(map->disk_ord_tbl[i]);
+ idx = ord_to_idx(ord);
+
+ if (idx != idx_1) {
+ disk = get_imsm_disk(super, idx);
+ if (!disk || is_failed(disk) ||
+ ord & IMSM_ORD_REBUILD)
+ failed++;
+ }
+ }
}
return failed;
disk->status |= FAILED_DISK;
set_imsm_ord_tbl_ent(map, slot, idx | IMSM_ORD_REBUILD);
- if (is_gen_migration(dev)) {
+ /* mark failures in second map if second map exists and this disk
+ * in this slot.
+ * This is valid for migration, initialization and rebuild
+ */
+ if (dev->vol.migr_state) {
struct imsm_map *map2 = get_imsm_map(dev, 1);
- if (slot < map2->num_members)
- set_imsm_ord_tbl_ent(map2, slot,
+ int slot2 = get_imsm_disk_slot(map2, idx);
+
+ if ((slot2 < map2->num_members) &&
+ (slot2 >= 0))
+ set_imsm_ord_tbl_ent(map2, slot2,
idx | IMSM_ORD_REBUILD);
}
if (map->failed_disk_num == 0xff)
return;
dprintf("imsm: mark missing\n");
+ /* end process for initialization and rebuild only
+ */
+ if (is_gen_migration(dev) == 0) {
+ __u8 map_state;
+ int failed;
+
+ failed = imsm_count_failed(super, dev, MAP_0);
+ map_state = imsm_check_degraded(super, dev, failed, MAP_0);
+
+ end_migration(dev, super, map_state);
+ }
for (dl = super->missing; dl; dl = dl->next)
mark_missing(dev, &dl->disk, dl->index);
super->updates_pending++;
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);
+ int failed = imsm_count_failed(super, dev, MAP_0);
+ __u8 map_state = imsm_check_degraded(super, dev, failed, MAP_0);
__u32 blocks_per_unit;
if (dev->vol.migr_state &&
*/
if (is_resyncing(dev)) {
dprintf("imsm: mark resync done\n");
- end_migration(dev, map_state);
+ end_migration(dev, super, map_state);
super->updates_pending++;
a->last_checkpoint = 0;
}
dprintf("imsm: set_disk %d:%x\n", n, state);
- ord = get_imsm_ord_tbl_ent(dev, n, -2);
+ ord = get_imsm_ord_tbl_ent(dev, n, 0);
disk = get_imsm_disk(super, ord_to_idx(ord));
/* check for new failures */
super->updates_pending++;
}
- failed = imsm_count_failed(super, dev);
- map_state = imsm_check_degraded(super, dev, failed);
+ failed = imsm_count_failed(super, dev, MAP_0);
+ map_state = imsm_check_degraded(super, dev, failed, MAP_0);
/* check if recovery complete, newly degraded, or failed */
- if (map_state == IMSM_T_STATE_NORMAL && is_rebuilding(dev)) {
- end_migration(dev, map_state);
- map = get_imsm_map(dev, 0);
- map->failed_disk_num = ~0;
- super->updates_pending++;
- a->last_checkpoint = 0;
- } 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++;
- a->last_checkpoint = 0;
- } else if (map_state == IMSM_T_STATE_FAILED &&
- map->map_state != map_state) {
- dprintf("imsm: mark failed\n");
- end_migration(dev, map_state);
- super->updates_pending++;
- a->last_checkpoint = 0;
- } else if (is_gen_migration(dev)) {
- dprintf("imsm: Detected General Migration in state: ");
-
- switch (map_state) {
- case IMSM_T_STATE_NORMAL:
- dprintf("normal\n");
+ dprintf("imsm: Detected transition to state ");
+ switch (map_state) {
+ case IMSM_T_STATE_NORMAL: /* transition to normal state */
+ dprintf("normal: ");
+ if (is_rebuilding(dev)) {
+ dprintf("while rebuilding");
+ end_migration(dev, super, map_state);
+ map = get_imsm_map(dev, 0);
+ map->failed_disk_num = ~0;
+ super->updates_pending++;
+ a->last_checkpoint = 0;
+ break;
+ }
+ if (is_gen_migration(dev)) {
+ dprintf("while general migration");
if (a->last_checkpoint >= a->info.component_size)
- end_migration(dev, map_state);
+ end_migration(dev, super, map_state);
+ else
+ map->map_state = map_state;
map = get_imsm_map(dev, 0);
map->failed_disk_num = ~0;
+ super->updates_pending++;
+ break;
+ }
+ break;
+ case IMSM_T_STATE_DEGRADED: /* transition to degraded state */
+ dprintf("degraded: ");
+ if ((map->map_state != map_state) &&
+ !dev->vol.migr_state) {
+ dprintf("mark degraded");
+ map->map_state = map_state;
+ super->updates_pending++;
+ a->last_checkpoint = 0;
break;
- case IMSM_T_STATE_DEGRADED:
- dprintf("degraded\n");
+ }
+ if (is_rebuilding(dev)) {
+ dprintf("while rebuilding.");
+ if (map->map_state != map_state) {
+ dprintf(" Map state change");
+ end_migration(dev, super, map_state);
+ super->updates_pending++;
+ }
+ break;
+ }
+ if (is_gen_migration(dev)) {
+ dprintf("while general migration");
if (a->last_checkpoint >= a->info.component_size)
- end_migration(dev, map_state);
+ end_migration(dev, super, map_state);
+ else {
+ map->map_state = map_state;
+ manage_second_map(super, dev);
+ }
+ super->updates_pending++;
break;
- default:
- dprintf("failed\n");
}
- map->map_state = map_state;
- super->updates_pending++;
+ if (is_initializing(dev)) {
+ dprintf("while initialization.");
+ map->map_state = map_state;
+ super->updates_pending++;
+ break;
+ }
+ break;
+ case IMSM_T_STATE_FAILED: /* transition to failed state */
+ dprintf("failed: ");
+ if (is_gen_migration(dev)) {
+ dprintf("while general migration");
+ map->map_state = map_state;
+ super->updates_pending++;
+ break;
+ }
+ if (map->map_state != map_state) {
+ dprintf("mark failed");
+ end_migration(dev, super, map_state);
+ super->updates_pending++;
+ a->last_checkpoint = 0;
+ break;
+ }
+ break;
+ default:
+ dprintf("state %i\n", map_state);
}
+ dprintf("\n");
+
}
static int store_imsm_mpb(int fd, struct imsm_super *mpb)
dev2 = get_imsm_dev(cont->sb, dev_idx);
if (dev2) {
- state = imsm_check_degraded(cont->sb, dev2, failed);
+ state = imsm_check_degraded(cont->sb, dev2, failed,
+ MAP_0);
if (state == IMSM_T_STATE_FAILED) {
map = get_imsm_map(dev2, 0);
if (!map)
if (imsm_reshape_blocks_arrays_changes(super))
return NULL;
+ /* Cannot activate another spare if rebuild is in progress already
+ */
+ if (is_rebuilding(dev)) {
+ dprintf("imsm: No spare activation allowed. "
+ "Rebuild in progress already.\n");
+ return NULL;
+ }
+
if (a->info.array.level == 4)
/* No repair for takeovered array
* imsm doesn't support raid4
*/
return NULL;
- if (imsm_check_degraded(super, dev, failed) != IMSM_T_STATE_DEGRADED)
+ if (imsm_check_degraded(super, dev, failed, MAP_0) !=
+ IMSM_T_STATE_DEGRADED)
return NULL;
/*
disk->status &= ~SPARE_DISK;
/* mark rebuild */
- to_state = imsm_check_degraded(super, dev, failed);
+ to_state = imsm_check_degraded(super, dev, failed,
+ MAP_0);
if (!second_map_created) {
second_map_created = 1;
map->map_state = IMSM_T_STATE_DEGRADED;
if (u->direction == R10_TO_R0) {
/* Number of failed disks must be half of initial disk number */
- if (imsm_count_failed(super, dev) != (map->num_members / 2))
+ if (imsm_count_failed(super, dev, MAP_0) !=
+ (map->num_members / 2))
return 0;
/* iterate through devices to mark removed disks as spare */
}
}
#endif /* MDASSEMBLE */
+
+static void close_targets(int *targets, int new_disks)
+{
+ int i;
+
+ if (!targets)
+ return;
+
+ for (i = 0; i < new_disks; i++) {
+ if (targets[i] >= 0) {
+ close(targets[i]);
+ targets[i] = -1;
+ }
+ }
+}
+
+static int imsm_get_allowed_degradation(int level, int raid_disks,
+ struct intel_super *super,
+ struct imsm_dev *dev)
+{
+ switch (level) {
+ case 10:{
+ int ret_val = 0;
+ struct imsm_map *map;
+ int i;
+
+ ret_val = raid_disks/2;
+ /* check map if all disks pairs not failed
+ * in both maps
+ */
+ map = get_imsm_map(dev, 0);
+ for (i = 0; i < ret_val; i++) {
+ int degradation = 0;
+ if (get_imsm_disk(super, i) == NULL)
+ degradation++;
+ if (get_imsm_disk(super, i + 1) == NULL)
+ degradation++;
+ if (degradation == 2)
+ return 0;
+ }
+ map = get_imsm_map(dev, 1);
+ /* if there is no second map
+ * result can be returned
+ */
+ if (map == NULL)
+ return ret_val;
+ /* check degradation in second map
+ */
+ for (i = 0; i < ret_val; i++) {
+ int degradation = 0;
+ if (get_imsm_disk(super, i) == NULL)
+ degradation++;
+ if (get_imsm_disk(super, i + 1) == NULL)
+ degradation++;
+ if (degradation == 2)
+ return 0;
+ }
+ return ret_val;
+ }
+ case 5:
+ return 1;
+ case 6:
+ return 2;
+ default:
+ return 0;
+ }
+}
+
+
/*******************************************************************************
* Function: open_backup_targets
* Description: Function opens file descriptors for all devices given in
* info : general array info
* raid_disks : number of disks
* raid_fds : table of device's file descriptors
+ * super : intel super for raid10 degradation check
+ * dev : intel device for raid10 degradation check
* Returns:
* 0 : success
* -1 : fail
******************************************************************************/
-int open_backup_targets(struct mdinfo *info, int raid_disks, int *raid_fds)
+int open_backup_targets(struct mdinfo *info, int raid_disks, int *raid_fds,
+ struct intel_super *super, struct imsm_dev *dev)
{
struct mdinfo *sd;
+ int i;
+ int opened = 0;
+
+ for (i = 0; i < raid_disks; i++)
+ raid_fds[i] = -1;
for (sd = info->devs ; sd ; sd = sd->next) {
char *dn;
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;
+ continue;
}
+ opened++;
+ }
+ /* check if maximum array degradation level is not exceeded
+ */
+ if ((raid_disks - opened) >
+ imsm_get_allowed_degradation(info->new_level,
+ raid_disks,
+ super, dev)) {
+ fprintf(stderr, "Not enough disks can be opened.\n");
+ close_targets(raid_fds, raid_disks);
+ return -2;
}
return 0;
}
target_offsets[i] -= start/data_disks;
}
- if (open_backup_targets(info, new_disks, targets))
+ if (open_backup_targets(info, new_disks, targets,
+ super, dev))
goto abort;
dest_layout = imsm_level_to_layout(map_dest->raid_level);
abort:
if (targets) {
- for (i = 0; i < new_disks; i++)
- if (targets[i] >= 0)
- close(targets[i]);
+ close_targets(targets, new_disks);
free(targets);
}
free(target_offsets);
unsigned long num_migr_units = __le32_to_cpu(migr_rec->num_migr_units);
char buffer[20];
int skipped_disks = 0;
- int max_degradation;
err = sysfs_get_str(info, NULL, "array_state", (char *)buffer, 20);
if (err < 1)
map_dest = get_imsm_map(id->dev, 0);
new_disks = map_dest->num_members;
- max_degradation = new_disks - imsm_num_data_members(id->dev, 0);
read_offset = (unsigned long long)
__le32_to_cpu(migr_rec->ckpt_area_pba) * 512;
if (!targets)
goto abort;
- open_backup_targets(info, new_disks, targets);
+ if (open_backup_targets(info, new_disks, targets, super, id->dev)) {
+ fprintf(stderr,
+ Name ": Cannot open some devices belonging to array.\n");
+ goto abort;
+ }
for (i = 0; i < new_disks; i++) {
if (targets[i] < 0) {
fprintf(stderr,
Name ": Cannot seek to block: %s\n",
strerror(errno));
- goto abort;
+ skipped_disks++;
+ continue;
}
if ((unsigned)read(targets[i], buf, unit_len) != unit_len) {
fprintf(stderr,
Name ": Cannot read copy area block: %s\n",
strerror(errno));
- goto abort;
+ skipped_disks++;
+ continue;
}
if (lseek64(targets[i], write_offset, SEEK_SET) < 0) {
fprintf(stderr,
Name ": Cannot seek to block: %s\n",
strerror(errno));
- goto abort;
+ skipped_disks++;
+ continue;
}
if ((unsigned)write(targets[i], buf, unit_len) != unit_len) {
fprintf(stderr,
Name ": Cannot restore block: %s\n",
strerror(errno));
- goto abort;
+ skipped_disks++;
+ continue;
}
}
- if (skipped_disks > max_degradation) {
+ if (skipped_disks > imsm_get_allowed_degradation(info->new_level,
+ new_disks,
+ super,
+ id->dev)) {
fprintf(stderr,
Name ": Cannot restore data from backup."
" Too many failed disks\n");
projects / thirdparty / mdadm.git / blobdiff