#include <linux/slab.h>
#include "md.h"
#include "bitmap.h"
+#include "md-cluster.h"
#ifndef MODULE
static void autostart_arrays(int part);
static LIST_HEAD(pers_list);
static DEFINE_SPINLOCK(pers_lock);
+struct md_cluster_operations *md_cluster_ops;
+EXPORT_SYMBOL(md_cluster_ops);
+struct module *md_cluster_mod;
+EXPORT_SYMBOL(md_cluster_mod);
+
static DECLARE_WAIT_QUEUE_HEAD(resync_wait);
static struct workqueue_struct *md_wq;
static struct workqueue_struct *md_misc_wq;
const int rw = bio_data_dir(bio);
struct mddev *mddev = q->queuedata;
unsigned int sectors;
+ int cpu;
if (mddev == NULL || mddev->pers == NULL
|| !mddev->ready) {
sectors = bio_sectors(bio);
mddev->pers->make_request(mddev, bio);
- generic_start_io_acct(rw, sectors, &mddev->gendisk->part0);
+ cpu = part_stat_lock();
+ part_stat_inc(cpu, &mddev->gendisk->part0, ios[rw]);
+ part_stat_add(cpu, &mddev->gendisk->part0, sectors[rw], sectors);
+ part_stat_unlock();
if (atomic_dec_and_test(&mddev->active_io) && mddev->suspended)
wake_up(&mddev->sb_wait);
}
EXPORT_SYMBOL_GPL(mddev_unlock);
-static struct md_rdev *find_rdev_nr_rcu(struct mddev *mddev, int nr)
+struct md_rdev *md_find_rdev_nr_rcu(struct mddev *mddev, int nr)
{
struct md_rdev *rdev;
return NULL;
}
+EXPORT_SYMBOL_GPL(md_find_rdev_nr_rcu);
static struct md_rdev *find_rdev(struct mddev *mddev, dev_t dev)
{
int choice = 0;
if (mddev->pers)
choice = mddev->raid_disks;
- while (find_rdev_nr_rcu(mddev, choice))
+ while (md_find_rdev_nr_rcu(mddev, choice))
choice++;
rdev->desc_nr = choice;
} else {
- if (find_rdev_nr_rcu(mddev, rdev->desc_nr)) {
+ if (md_find_rdev_nr_rcu(mddev, rdev->desc_nr)) {
rcu_read_unlock();
return -EBUSY;
}
kobject_put(&rdev->kobj);
}
-static void kick_rdev_from_array(struct md_rdev *rdev)
+void md_kick_rdev_from_array(struct md_rdev *rdev)
{
unbind_rdev_from_array(rdev);
export_rdev(rdev);
}
+EXPORT_SYMBOL_GPL(md_kick_rdev_from_array);
static void export_array(struct mddev *mddev)
{
while (!list_empty(&mddev->disks)) {
rdev = list_first_entry(&mddev->disks, struct md_rdev,
same_set);
- kick_rdev_from_array(rdev);
+ md_kick_rdev_from_array(rdev);
}
mddev->raid_disks = 0;
mddev->major_version = 0;
}
}
-static void md_update_sb(struct mddev *mddev, int force_change)
+void md_update_sb(struct mddev *mddev, int force_change)
{
struct md_rdev *rdev;
int sync_req;
wake_up(&rdev->blocked_wait);
}
}
+EXPORT_SYMBOL(md_update_sb);
+
+static int add_bound_rdev(struct md_rdev *rdev)
+{
+ struct mddev *mddev = rdev->mddev;
+ int err = 0;
+
+ if (!mddev->pers->hot_remove_disk) {
+ /* If there is hot_add_disk but no hot_remove_disk
+ * then added disks for geometry changes,
+ * and should be added immediately.
+ */
+ super_types[mddev->major_version].
+ validate_super(mddev, rdev);
+ err = mddev->pers->hot_add_disk(mddev, rdev);
+ if (err) {
+ unbind_rdev_from_array(rdev);
+ export_rdev(rdev);
+ return err;
+ }
+ }
+ sysfs_notify_dirent_safe(rdev->sysfs_state);
+
+ set_bit(MD_CHANGE_DEVS, &mddev->flags);
+ if (mddev->degraded)
+ set_bit(MD_RECOVERY_RECOVER, &mddev->recovery);
+ set_bit(MD_RECOVERY_NEEDED, &mddev->recovery);
+ md_new_event(mddev);
+ md_wakeup_thread(mddev->thread);
+ return 0;
+}
/* words written to sysfs files may, or may not, be \n terminated.
* We want to accept with case. For this we use cmd_match.
err = -EBUSY;
else {
struct mddev *mddev = rdev->mddev;
- kick_rdev_from_array(rdev);
+ if (mddev_is_clustered(mddev))
+ md_cluster_ops->remove_disk(mddev, rdev);
+ md_kick_rdev_from_array(rdev);
+ if (mddev_is_clustered(mddev))
+ md_cluster_ops->metadata_update_start(mddev);
if (mddev->pers)
md_update_sb(mddev, 1);
md_new_event(mddev);
+ if (mddev_is_clustered(mddev))
+ md_cluster_ops->metadata_update_finish(mddev);
err = 0;
}
} else if (cmd_match(buf, "writemostly")) {
clear_bit(Replacement, &rdev->flags);
err = 0;
}
+ } else if (cmd_match(buf, "re-add")) {
+ if (test_bit(Faulty, &rdev->flags) && (rdev->raid_disk == -1)) {
+ /* clear_bit is performed _after_ all the devices
+ * have their local Faulty bit cleared. If any writes
+ * happen in the meantime in the local node, they
+ * will land in the local bitmap, which will be synced
+ * by this node eventually
+ */
+ if (!mddev_is_clustered(rdev->mddev) ||
+ (err = md_cluster_ops->gather_bitmaps(rdev)) == 0) {
+ clear_bit(Faulty, &rdev->flags);
+ err = add_bound_rdev(rdev);
+ }
+ } else
+ err = -EBUSY;
}
if (!err)
sysfs_notify_dirent_safe(rdev->sysfs_state);
"md: fatal superblock inconsistency in %s"
" -- removing from array\n",
bdevname(rdev->bdev,b));
- kick_rdev_from_array(rdev);
+ md_kick_rdev_from_array(rdev);
}
super_types[mddev->major_version].
"md: %s: %s: only %d devices permitted\n",
mdname(mddev), bdevname(rdev->bdev, b),
mddev->max_disks);
- kick_rdev_from_array(rdev);
+ md_kick_rdev_from_array(rdev);
continue;
}
- if (rdev != freshest)
+ if (rdev != freshest) {
if (super_types[mddev->major_version].
validate_super(mddev, rdev)) {
printk(KERN_WARNING "md: kicking non-fresh %s"
" from array!\n",
bdevname(rdev->bdev,b));
- kick_rdev_from_array(rdev);
+ md_kick_rdev_from_array(rdev);
continue;
}
+ /* No device should have a Candidate flag
+ * when reading devices
+ */
+ if (test_bit(Candidate, &rdev->flags)) {
+ pr_info("md: kicking Cluster Candidate %s from array!\n",
+ bdevname(rdev->bdev, b));
+ md_kick_rdev_from_array(rdev);
+ }
+ }
if (mddev->level == LEVEL_MULTIPATH) {
rdev->desc_nr = i++;
rdev->raid_disk = rdev->desc_nr;
if (err)
return err;
if (mddev->pers) {
+ if (mddev_is_clustered(mddev))
+ md_cluster_ops->metadata_update_start(mddev);
err = update_size(mddev, sectors);
md_update_sb(mddev, 1);
+ if (mddev_is_clustered(mddev))
+ md_cluster_ops->metadata_update_finish(mddev);
} else {
if (mddev->dev_sectors == 0 ||
mddev->dev_sectors > sectors)
{
unsigned long long min;
int err;
- int chunk;
if (kstrtoull(buf, 10, &min))
return -EINVAL;
if (test_bit(MD_RECOVERY_RUNNING, &mddev->recovery))
goto out_unlock;
- /* Must be a multiple of chunk_size */
- chunk = mddev->chunk_sectors;
- if (chunk) {
- sector_t temp = min;
-
- err = -EINVAL;
- if (sector_div(temp, chunk))
- goto out_unlock;
- }
- mddev->resync_min = min;
+ /* Round down to multiple of 4K for safety */
+ mddev->resync_min = round_down(min, 8);
err = 0;
out_unlock:
}
if (err == 0 && pers->sync_request &&
(mddev->bitmap_info.file || mddev->bitmap_info.offset)) {
- err = bitmap_create(mddev);
- if (err)
+ struct bitmap *bitmap;
+
+ bitmap = bitmap_create(mddev, -1);
+ if (IS_ERR(bitmap)) {
+ err = PTR_ERR(bitmap);
printk(KERN_ERR "%s: failed to create bitmap (%d)\n",
mdname(mddev), err);
+ } else
+ mddev->bitmap = bitmap;
+
}
if (err) {
mddev_detach(mddev);
- pers->free(mddev, mddev->private);
+ if (mddev->private)
+ pers->free(mddev, mddev->private);
module_put(pers->owner);
bitmap_destroy(mddev);
return err;
static void __md_stop_writes(struct mddev *mddev)
{
+ if (mddev_is_clustered(mddev))
+ md_cluster_ops->metadata_update_start(mddev);
set_bit(MD_RECOVERY_FROZEN, &mddev->recovery);
flush_workqueue(md_misc_wq);
if (mddev->sync_thread) {
mddev->in_sync = 1;
md_update_sb(mddev, 1);
}
+ if (mddev_is_clustered(mddev))
+ md_cluster_ops->metadata_update_finish(mddev);
}
void md_stop_writes(struct mddev *mddev)
info.state = (1<<MD_SB_CLEAN);
if (mddev->bitmap && mddev->bitmap_info.offset)
info.state |= (1<<MD_SB_BITMAP_PRESENT);
+ if (mddev_is_clustered(mddev))
+ info.state |= (1<<MD_SB_CLUSTERED);
info.active_disks = insync;
info.working_disks = working;
info.failed_disks = failed;
return -EFAULT;
rcu_read_lock();
- rdev = find_rdev_nr_rcu(mddev, info.number);
+ rdev = md_find_rdev_nr_rcu(mddev, info.number);
if (rdev) {
info.major = MAJOR(rdev->bdev->bd_dev);
info.minor = MINOR(rdev->bdev->bd_dev);
struct md_rdev *rdev;
dev_t dev = MKDEV(info->major,info->minor);
+ if (mddev_is_clustered(mddev) &&
+ !(info->state & ((1 << MD_DISK_CLUSTER_ADD) | (1 << MD_DISK_CANDIDATE)))) {
+ pr_err("%s: Cannot add to clustered mddev.\n",
+ mdname(mddev));
+ return -EINVAL;
+ }
+
if (info->major != MAJOR(dev) || info->minor != MINOR(dev))
return -EOVERFLOW;
else
clear_bit(WriteMostly, &rdev->flags);
+ /*
+ * check whether the device shows up in other nodes
+ */
+ if (mddev_is_clustered(mddev)) {
+ if (info->state & (1 << MD_DISK_CANDIDATE)) {
+ /* Through --cluster-confirm */
+ set_bit(Candidate, &rdev->flags);
+ err = md_cluster_ops->new_disk_ack(mddev, true);
+ if (err) {
+ export_rdev(rdev);
+ return err;
+ }
+ } else if (info->state & (1 << MD_DISK_CLUSTER_ADD)) {
+ /* --add initiated by this node */
+ err = md_cluster_ops->add_new_disk_start(mddev, rdev);
+ if (err) {
+ md_cluster_ops->add_new_disk_finish(mddev);
+ export_rdev(rdev);
+ return err;
+ }
+ }
+ }
+
rdev->raid_disk = -1;
err = bind_rdev_to_array(rdev, mddev);
- if (!err && !mddev->pers->hot_remove_disk) {
- /* If there is hot_add_disk but no hot_remove_disk
- * then added disks for geometry changes,
- * and should be added immediately.
- */
- super_types[mddev->major_version].
- validate_super(mddev, rdev);
- err = mddev->pers->hot_add_disk(mddev, rdev);
- if (err)
- unbind_rdev_from_array(rdev);
- }
if (err)
export_rdev(rdev);
else
- sysfs_notify_dirent_safe(rdev->sysfs_state);
-
- set_bit(MD_CHANGE_DEVS, &mddev->flags);
- if (mddev->degraded)
- set_bit(MD_RECOVERY_RECOVER, &mddev->recovery);
- set_bit(MD_RECOVERY_NEEDED, &mddev->recovery);
- if (!err)
- md_new_event(mddev);
- md_wakeup_thread(mddev->thread);
+ err = add_bound_rdev(rdev);
+ if (mddev_is_clustered(mddev) &&
+ (info->state & (1 << MD_DISK_CLUSTER_ADD)))
+ md_cluster_ops->add_new_disk_finish(mddev);
return err;
}
if (!rdev)
return -ENXIO;
+ if (mddev_is_clustered(mddev))
+ md_cluster_ops->metadata_update_start(mddev);
+
clear_bit(Blocked, &rdev->flags);
remove_and_add_spares(mddev, rdev);
if (rdev->raid_disk >= 0)
goto busy;
- kick_rdev_from_array(rdev);
+ if (mddev_is_clustered(mddev))
+ md_cluster_ops->remove_disk(mddev, rdev);
+
+ md_kick_rdev_from_array(rdev);
md_update_sb(mddev, 1);
md_new_event(mddev);
+ if (mddev_is_clustered(mddev))
+ md_cluster_ops->metadata_update_finish(mddev);
+
return 0;
busy:
+ if (mddev_is_clustered(mddev))
+ md_cluster_ops->metadata_update_cancel(mddev);
printk(KERN_WARNING "md: cannot remove active disk %s from %s ...\n",
bdevname(rdev->bdev,b), mdname(mddev));
return -EBUSY;
err = -EINVAL;
goto abort_export;
}
+
+ if (mddev_is_clustered(mddev))
+ md_cluster_ops->metadata_update_start(mddev);
clear_bit(In_sync, &rdev->flags);
rdev->desc_nr = -1;
rdev->saved_raid_disk = -1;
err = bind_rdev_to_array(rdev, mddev);
if (err)
- goto abort_export;
+ goto abort_clustered;
/*
* The rest should better be atomic, we can have disk failures
md_update_sb(mddev, 1);
+ if (mddev_is_clustered(mddev))
+ md_cluster_ops->metadata_update_finish(mddev);
/*
* Kick recovery, maybe this spare has to be added to the
* array immediately.
md_new_event(mddev);
return 0;
+abort_clustered:
+ if (mddev_is_clustered(mddev))
+ md_cluster_ops->metadata_update_cancel(mddev);
abort_export:
export_rdev(rdev);
return err;
if (mddev->pers) {
mddev->pers->quiesce(mddev, 1);
if (fd >= 0) {
- err = bitmap_create(mddev);
- if (!err)
+ struct bitmap *bitmap;
+
+ bitmap = bitmap_create(mddev, -1);
+ if (!IS_ERR(bitmap)) {
+ mddev->bitmap = bitmap;
err = bitmap_load(mddev);
+ } else
+ err = PTR_ERR(bitmap);
}
if (fd < 0 || err) {
bitmap_destroy(mddev);
return rv;
}
}
+ if (mddev_is_clustered(mddev))
+ md_cluster_ops->metadata_update_start(mddev);
if (info->size >= 0 && mddev->dev_sectors / 2 != info->size)
rv = update_size(mddev, (sector_t)info->size * 2);
rv = update_raid_disks(mddev, info->raid_disks);
if ((state ^ info->state) & (1<<MD_SB_BITMAP_PRESENT)) {
- if (mddev->pers->quiesce == NULL || mddev->thread == NULL)
- return -EINVAL;
- if (mddev->recovery || mddev->sync_thread)
- return -EBUSY;
+ if (mddev->pers->quiesce == NULL || mddev->thread == NULL) {
+ rv = -EINVAL;
+ goto err;
+ }
+ if (mddev->recovery || mddev->sync_thread) {
+ rv = -EBUSY;
+ goto err;
+ }
if (info->state & (1<<MD_SB_BITMAP_PRESENT)) {
+ struct bitmap *bitmap;
/* add the bitmap */
- if (mddev->bitmap)
- return -EEXIST;
- if (mddev->bitmap_info.default_offset == 0)
- return -EINVAL;
+ if (mddev->bitmap) {
+ rv = -EEXIST;
+ goto err;
+ }
+ if (mddev->bitmap_info.default_offset == 0) {
+ rv = -EINVAL;
+ goto err;
+ }
mddev->bitmap_info.offset =
mddev->bitmap_info.default_offset;
mddev->bitmap_info.space =
mddev->bitmap_info.default_space;
mddev->pers->quiesce(mddev, 1);
- rv = bitmap_create(mddev);
- if (!rv)
+ bitmap = bitmap_create(mddev, -1);
+ if (!IS_ERR(bitmap)) {
+ mddev->bitmap = bitmap;
rv = bitmap_load(mddev);
+ } else
+ rv = PTR_ERR(bitmap);
if (rv)
bitmap_destroy(mddev);
mddev->pers->quiesce(mddev, 0);
} else {
/* remove the bitmap */
- if (!mddev->bitmap)
- return -ENOENT;
- if (mddev->bitmap->storage.file)
- return -EINVAL;
+ if (!mddev->bitmap) {
+ rv = -ENOENT;
+ goto err;
+ }
+ if (mddev->bitmap->storage.file) {
+ rv = -EINVAL;
+ goto err;
+ }
mddev->pers->quiesce(mddev, 1);
bitmap_destroy(mddev);
mddev->pers->quiesce(mddev, 0);
}
}
md_update_sb(mddev, 1);
+ if (mddev_is_clustered(mddev))
+ md_cluster_ops->metadata_update_finish(mddev);
+ return rv;
+err:
+ if (mddev_is_clustered(mddev))
+ md_cluster_ops->metadata_update_cancel(mddev);
return rv;
}
case SET_DISK_FAULTY:
case STOP_ARRAY:
case STOP_ARRAY_RO:
+ case CLUSTERED_DISK_NACK:
return true;
default:
return false;
goto unlock;
}
+ case CLUSTERED_DISK_NACK:
+ if (mddev_is_clustered(mddev))
+ md_cluster_ops->new_disk_ack(mddev, false);
+ else
+ err = -EINVAL;
+ goto unlock;
+
case HOT_ADD_DISK:
err = hot_add_disk(mddev, new_decode_dev(arg));
goto unlock;
}
EXPORT_SYMBOL(unregister_md_personality);
+int register_md_cluster_operations(struct md_cluster_operations *ops, struct module *module)
+{
+ if (md_cluster_ops != NULL)
+ return -EALREADY;
+ spin_lock(&pers_lock);
+ md_cluster_ops = ops;
+ md_cluster_mod = module;
+ spin_unlock(&pers_lock);
+ return 0;
+}
+EXPORT_SYMBOL(register_md_cluster_operations);
+
+int unregister_md_cluster_operations(void)
+{
+ spin_lock(&pers_lock);
+ md_cluster_ops = NULL;
+ spin_unlock(&pers_lock);
+ return 0;
+}
+EXPORT_SYMBOL(unregister_md_cluster_operations);
+
+int md_setup_cluster(struct mddev *mddev, int nodes)
+{
+ int err;
+
+ err = request_module("md-cluster");
+ if (err) {
+ pr_err("md-cluster module not found.\n");
+ return err;
+ }
+
+ spin_lock(&pers_lock);
+ if (!md_cluster_ops || !try_module_get(md_cluster_mod)) {
+ spin_unlock(&pers_lock);
+ return -ENOENT;
+ }
+ spin_unlock(&pers_lock);
+
+ return md_cluster_ops->join(mddev, nodes);
+}
+
+void md_cluster_stop(struct mddev *mddev)
+{
+ if (!md_cluster_ops)
+ return;
+ md_cluster_ops->leave(mddev);
+ module_put(md_cluster_mod);
+}
+
static int is_mddev_idle(struct mddev *mddev, int init)
{
struct md_rdev *rdev;
mddev->safemode == 0)
mddev->safemode = 1;
spin_unlock(&mddev->lock);
+ if (mddev_is_clustered(mddev))
+ md_cluster_ops->metadata_update_start(mddev);
md_update_sb(mddev, 0);
+ if (mddev_is_clustered(mddev))
+ md_cluster_ops->metadata_update_finish(mddev);
sysfs_notify_dirent_safe(mddev->sysfs_state);
} else
spin_unlock(&mddev->lock);
md_new_event(mddev);
update_time = jiffies;
+ if (mddev_is_clustered(mddev))
+ md_cluster_ops->resync_start(mddev, j, max_sectors);
+
blk_start_plug(&plug);
while (j < max_sectors) {
sector_t sectors;
if (test_bit(MD_RECOVERY_INTR, &mddev->recovery))
break;
- sectors = mddev->pers->sync_request(mddev, j, &skipped,
- currspeed < speed_min(mddev));
+ sectors = mddev->pers->sync_request(mddev, j, &skipped);
if (sectors == 0) {
set_bit(MD_RECOVERY_INTR, &mddev->recovery);
break;
j += sectors;
if (j > 2)
mddev->curr_resync = j;
+ if (mddev_is_clustered(mddev))
+ md_cluster_ops->resync_info_update(mddev, j, max_sectors);
mddev->curr_mark_cnt = io_sectors;
if (last_check == 0)
/* this is the earliest that rebuild will be
wait_event(mddev->recovery_wait, !atomic_read(&mddev->recovery_active));
/* tell personality that we are finished */
- mddev->pers->sync_request(mddev, max_sectors, &skipped, 1);
+ mddev->pers->sync_request(mddev, max_sectors, &skipped);
+
+ if (mddev_is_clustered(mddev))
+ md_cluster_ops->resync_finish(mddev);
if (!test_bit(MD_RECOVERY_CHECK, &mddev->recovery) &&
mddev->curr_resync > 2) {
sysfs_notify_dirent_safe(mddev->sysfs_state);
}
- if (mddev->flags & MD_UPDATE_SB_FLAGS)
+ if (mddev->flags & MD_UPDATE_SB_FLAGS) {
+ if (mddev_is_clustered(mddev))
+ md_cluster_ops->metadata_update_start(mddev);
md_update_sb(mddev, 0);
+ if (mddev_is_clustered(mddev))
+ md_cluster_ops->metadata_update_finish(mddev);
+ }
if (test_bit(MD_RECOVERY_RUNNING, &mddev->recovery) &&
!test_bit(MD_RECOVERY_DONE, &mddev->recovery)) {
set_bit(MD_CHANGE_DEVS, &mddev->flags);
}
}
+ if (mddev_is_clustered(mddev))
+ md_cluster_ops->metadata_update_start(mddev);
if (test_bit(MD_RECOVERY_RESHAPE, &mddev->recovery) &&
mddev->pers->finish_reshape)
mddev->pers->finish_reshape(mddev);
rdev->saved_raid_disk = -1;
md_update_sb(mddev, 1);
+ if (mddev_is_clustered(mddev))
+ md_cluster_ops->metadata_update_finish(mddev);
clear_bit(MD_RECOVERY_RUNNING, &mddev->recovery);
clear_bit(MD_RECOVERY_SYNC, &mddev->recovery);
clear_bit(MD_RECOVERY_RESHAPE, &mddev->recovery);
return ret;
}
+void md_reload_sb(struct mddev *mddev)
+{
+ struct md_rdev *rdev, *tmp;
+
+ rdev_for_each_safe(rdev, tmp, mddev) {
+ rdev->sb_loaded = 0;
+ ClearPageUptodate(rdev->sb_page);
+ }
+ mddev->raid_disks = 0;
+ analyze_sbs(mddev);
+ rdev_for_each_safe(rdev, tmp, mddev) {
+ struct mdp_superblock_1 *sb = page_address(rdev->sb_page);
+ /* since we don't write to faulty devices, we figure out if the
+ * disk is faulty by comparing events
+ */
+ if (mddev->events > sb->events)
+ set_bit(Faulty, &rdev->flags);
+ }
+
+}
+EXPORT_SYMBOL(md_reload_sb);
+
#ifndef MODULE
/*
git.samba.org / sfrench / cifs-2.6.git / blobdiff