static struct workqueue_struct *md_wq;
static struct workqueue_struct *md_misc_wq;
+static int remove_and_add_spares(struct mddev *mddev,
+ struct md_rdev *this);
+
#define MD_BUG(x...) { printk("md: bug in file %s, line %d\n", __FILE__, __LINE__); md_print_devices(); }
/*
if (offset == 0 && size == bio->bi_size)
return;
- bio->bi_sector += offset;
- bio->bi_size = size;
- offset <<= 9;
clear_bit(BIO_SEG_VALID, &bio->bi_flags);
- while (bio->bi_idx < bio->bi_vcnt &&
- bio->bi_io_vec[bio->bi_idx].bv_len <= offset) {
- /* remove this whole bio_vec */
- offset -= bio->bi_io_vec[bio->bi_idx].bv_len;
- bio->bi_idx++;
- }
- if (bio->bi_idx < bio->bi_vcnt) {
- bio->bi_io_vec[bio->bi_idx].bv_offset += offset;
- bio->bi_io_vec[bio->bi_idx].bv_len -= offset;
- }
+ bio_advance(bio, offset << 9);
+
+ bio->bi_size = size;
+
/* avoid any complications with bi_idx being non-zero*/
if (bio->bi_idx) {
memmove(bio->bi_io_vec, bio->bi_io_vec+bio->bi_idx,
sector, count, 1) == 0)
return -EINVAL;
}
- } else if (sb->bblog_offset == 0)
- rdev->badblocks.shift = -1;
+ } else if (sb->bblog_offset != 0)
+ rdev->badblocks.shift = 0;
if (!refdev) {
ret = 1;
int nospares = 0;
int any_badblocks_changed = 0;
+ if (mddev->ro) {
+ if (force_change)
+ set_bit(MD_CHANGE_DEVS, &mddev->flags);
+ return;
+ }
repeat:
/* First make sure individual recovery_offsets are correct */
rdev_for_each(rdev, mddev) {
/* personality does all needed checks */
if (rdev->mddev->pers->hot_remove_disk == NULL)
return -EINVAL;
- err = rdev->mddev->pers->
- hot_remove_disk(rdev->mddev, rdev);
- if (err)
- return err;
- sysfs_unlink_rdev(rdev->mddev, rdev);
- rdev->raid_disk = -1;
+ clear_bit(Blocked, &rdev->flags);
+ remove_and_add_spares(rdev->mddev, rdev);
+ if (rdev->raid_disk >= 0)
+ return -EBUSY;
set_bit(MD_RECOVERY_NEEDED, &rdev->mddev->recovery);
md_wakeup_thread(rdev->mddev->thread);
} else if (rdev->mddev->pers) {
* be used - I wonder if that matters
*/
rdev->badblocks.count = 0;
- rdev->badblocks.shift = 0;
+ rdev->badblocks.shift = -1; /* disabled until explicitly enabled */
rdev->badblocks.page = kmalloc(PAGE_SIZE, GFP_KERNEL);
seqlock_init(&rdev->badblocks.lock);
if (rdev->badblocks.page == NULL)
goto abort_free;
}
}
- if (super_format == -1)
- /* hot-add for 0.90, or non-persistent: so no badblocks */
- rdev->badblocks.shift = -1;
return rdev;
return sprintf(page, "%s\n", type);
}
-static void reap_sync_thread(struct mddev *mddev);
-
static ssize_t
action_store(struct mddev *mddev, const char *page, size_t len)
{
if (cmd_match(page, "idle") || cmd_match(page, "frozen")) {
if (mddev->sync_thread) {
set_bit(MD_RECOVERY_INTR, &mddev->recovery);
- reap_sync_thread(mddev);
+ md_reap_sync_thread(mddev);
}
} else if (test_bit(MD_RECOVERY_RUNNING, &mddev->recovery) ||
test_bit(MD_RECOVERY_NEEDED, &mddev->recovery))
if (mddev->sync_thread) {
set_bit(MD_RECOVERY_FROZEN, &mddev->recovery);
set_bit(MD_RECOVERY_INTR, &mddev->recovery);
- reap_sync_thread(mddev);
+ md_reap_sync_thread(mddev);
}
del_timer_sync(&mddev->safemode_timer);
bitmap_flush(mddev);
md_super_wait(mddev);
- if (!mddev->in_sync || mddev->flags) {
+ if (mddev->ro == 0 &&
+ (!mddev->in_sync || mddev->flags)) {
/* mark array as shutdown cleanly */
mddev->in_sync = 1;
md_update_sb(mddev, 1);
else
sysfs_notify_dirent_safe(rdev->sysfs_state);
- md_update_sb(mddev, 1);
+ 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 (!rdev)
return -ENXIO;
+ clear_bit(Blocked, &rdev->flags);
+ remove_and_add_spares(mddev, rdev);
+
if (rdev->raid_disk >= 0)
goto busy;
err = md_set_readonly(mddev, bdev);
goto done_unlock;
+ case HOT_REMOVE_DISK:
+ err = hot_remove_disk(mddev, new_decode_dev(arg));
+ goto done_unlock;
+
+ case ADD_NEW_DISK:
+ /* We can support ADD_NEW_DISK on read-only arrays
+ * on if we are re-adding a preexisting device.
+ * So require mddev->pers and MD_DISK_SYNC.
+ */
+ if (mddev->pers) {
+ mdu_disk_info_t info;
+ if (copy_from_user(&info, argp, sizeof(info)))
+ err = -EFAULT;
+ else if (!(info.state & (1<<MD_DISK_SYNC)))
+ /* Need to clear read-only for this */
+ break;
+ else
+ err = add_new_disk(mddev, &info);
+ goto done_unlock;
+ }
+ break;
+
case BLKROSET:
if (get_user(ro, (int __user *)(arg))) {
err = -EFAULT;
goto done_unlock;
}
- case HOT_REMOVE_DISK:
- err = hot_remove_disk(mddev, new_decode_dev(arg));
- goto done_unlock;
-
case HOT_ADD_DISK:
err = hot_add_disk(mddev, new_decode_dev(arg));
goto done_unlock;
return err;
}
-static int md_release(struct gendisk *disk, fmode_t mode)
+static void md_release(struct gendisk *disk, fmode_t mode)
{
struct mddev *mddev = disk->private_data;
BUG_ON(!mddev);
atomic_dec(&mddev->openers);
mddev_put(mddev);
-
- return 0;
}
static int md_media_changed(struct gendisk *disk)
}
EXPORT_SYMBOL_GPL(md_do_sync);
-static int remove_and_add_spares(struct mddev *mddev)
+static int remove_and_add_spares(struct mddev *mddev,
+ struct md_rdev *this)
{
struct md_rdev *rdev;
int spares = 0;
int removed = 0;
rdev_for_each(rdev, mddev)
- if (rdev->raid_disk >= 0 &&
+ if ((this == NULL || rdev == this) &&
+ rdev->raid_disk >= 0 &&
!test_bit(Blocked, &rdev->flags) &&
(test_bit(Faulty, &rdev->flags) ||
! test_bit(In_sync, &rdev->flags)) &&
removed++;
}
}
- if (removed)
- sysfs_notify(&mddev->kobj, NULL,
- "degraded");
+ if (removed && mddev->kobj.sd)
+ sysfs_notify(&mddev->kobj, NULL, "degraded");
+ if (this)
+ goto no_add;
rdev_for_each(rdev, mddev) {
if (rdev->raid_disk >= 0 &&
!test_bit(In_sync, &rdev->flags) &&
!test_bit(Faulty, &rdev->flags))
spares++;
- if (rdev->raid_disk < 0
- && !test_bit(Faulty, &rdev->flags)) {
- rdev->recovery_offset = 0;
- if (mddev->pers->
- hot_add_disk(mddev, rdev) == 0) {
- if (sysfs_link_rdev(mddev, rdev))
- /* failure here is OK */;
- spares++;
- md_new_event(mddev);
- set_bit(MD_CHANGE_DEVS, &mddev->flags);
- }
+ if (rdev->raid_disk >= 0)
+ continue;
+ if (test_bit(Faulty, &rdev->flags))
+ continue;
+ if (mddev->ro &&
+ rdev->saved_raid_disk < 0)
+ continue;
+
+ rdev->recovery_offset = 0;
+ if (rdev->saved_raid_disk >= 0 && mddev->in_sync) {
+ spin_lock_irq(&mddev->write_lock);
+ if (mddev->in_sync)
+ /* OK, this device, which is in_sync,
+ * will definitely be noticed before
+ * the next write, so recovery isn't
+ * needed.
+ */
+ rdev->recovery_offset = mddev->recovery_cp;
+ spin_unlock_irq(&mddev->write_lock);
+ }
+ if (mddev->ro && rdev->recovery_offset != MaxSector)
+ /* not safe to add this disk now */
+ continue;
+ if (mddev->pers->
+ hot_add_disk(mddev, rdev) == 0) {
+ if (sysfs_link_rdev(mddev, rdev))
+ /* failure here is OK */;
+ spares++;
+ md_new_event(mddev);
+ set_bit(MD_CHANGE_DEVS, &mddev->flags);
}
}
+no_add:
if (removed)
set_bit(MD_CHANGE_DEVS, &mddev->flags);
return spares;
}
-static void reap_sync_thread(struct mddev *mddev)
-{
- struct md_rdev *rdev;
-
- /* resync has finished, collect result */
- md_unregister_thread(&mddev->sync_thread);
- if (!test_bit(MD_RECOVERY_INTR, &mddev->recovery) &&
- !test_bit(MD_RECOVERY_REQUESTED, &mddev->recovery)) {
- /* success...*/
- /* activate any spares */
- if (mddev->pers->spare_active(mddev)) {
- sysfs_notify(&mddev->kobj, NULL,
- "degraded");
- set_bit(MD_CHANGE_DEVS, &mddev->flags);
- }
- }
- if (test_bit(MD_RECOVERY_RESHAPE, &mddev->recovery) &&
- mddev->pers->finish_reshape)
- mddev->pers->finish_reshape(mddev);
-
- /* If array is no-longer degraded, then any saved_raid_disk
- * information must be scrapped. Also if any device is now
- * In_sync we must scrape the saved_raid_disk for that device
- * do the superblock for an incrementally recovered device
- * written out.
- */
- rdev_for_each(rdev, mddev)
- if (!mddev->degraded ||
- test_bit(In_sync, &rdev->flags))
- rdev->saved_raid_disk = -1;
-
- md_update_sb(mddev, 1);
- clear_bit(MD_RECOVERY_RUNNING, &mddev->recovery);
- clear_bit(MD_RECOVERY_SYNC, &mddev->recovery);
- clear_bit(MD_RECOVERY_RESHAPE, &mddev->recovery);
- clear_bit(MD_RECOVERY_REQUESTED, &mddev->recovery);
- clear_bit(MD_RECOVERY_CHECK, &mddev->recovery);
- /* flag recovery needed just to double check */
- set_bit(MD_RECOVERY_NEEDED, &mddev->recovery);
- sysfs_notify_dirent_safe(mddev->sysfs_action);
- md_new_event(mddev);
- if (mddev->event_work.func)
- queue_work(md_misc_wq, &mddev->event_work);
-}
-
/*
* This routine is regularly called by all per-raid-array threads to
* deal with generic issues like resync and super-block update.
int spares = 0;
if (mddev->ro) {
- /* Only thing we do on a ro array is remove
- * failed devices.
+ /* On a read-only array we can:
+ * - remove failed devices
+ * - add already-in_sync devices if the array itself
+ * is in-sync.
+ * As we only add devices that are already in-sync,
+ * we can activate the spares immediately.
*/
- struct md_rdev *rdev;
- rdev_for_each(rdev, mddev)
- if (rdev->raid_disk >= 0 &&
- !test_bit(Blocked, &rdev->flags) &&
- test_bit(Faulty, &rdev->flags) &&
- atomic_read(&rdev->nr_pending)==0) {
- if (mddev->pers->hot_remove_disk(
- mddev, rdev) == 0) {
- sysfs_unlink_rdev(mddev, rdev);
- rdev->raid_disk = -1;
- }
- }
clear_bit(MD_RECOVERY_NEEDED, &mddev->recovery);
+ remove_and_add_spares(mddev, NULL);
+ mddev->pers->spare_active(mddev);
goto unlock;
}
goto unlock;
}
if (mddev->sync_thread) {
- reap_sync_thread(mddev);
+ md_reap_sync_thread(mddev);
goto unlock;
}
/* Set RUNNING before clearing NEEDED to avoid
goto unlock;
set_bit(MD_RECOVERY_RESHAPE, &mddev->recovery);
clear_bit(MD_RECOVERY_RECOVER, &mddev->recovery);
- } else if ((spares = remove_and_add_spares(mddev))) {
+ } else if ((spares = remove_and_add_spares(mddev, NULL))) {
clear_bit(MD_RECOVERY_SYNC, &mddev->recovery);
clear_bit(MD_RECOVERY_CHECK, &mddev->recovery);
clear_bit(MD_RECOVERY_REQUESTED, &mddev->recovery);
}
}
+void md_reap_sync_thread(struct mddev *mddev)
+{
+ struct md_rdev *rdev;
+
+ /* resync has finished, collect result */
+ md_unregister_thread(&mddev->sync_thread);
+ if (!test_bit(MD_RECOVERY_INTR, &mddev->recovery) &&
+ !test_bit(MD_RECOVERY_REQUESTED, &mddev->recovery)) {
+ /* success...*/
+ /* activate any spares */
+ if (mddev->pers->spare_active(mddev)) {
+ sysfs_notify(&mddev->kobj, NULL,
+ "degraded");
+ set_bit(MD_CHANGE_DEVS, &mddev->flags);
+ }
+ }
+ if (test_bit(MD_RECOVERY_RESHAPE, &mddev->recovery) &&
+ mddev->pers->finish_reshape)
+ mddev->pers->finish_reshape(mddev);
+
+ /* If array is no-longer degraded, then any saved_raid_disk
+ * information must be scrapped. Also if any device is now
+ * In_sync we must scrape the saved_raid_disk for that device
+ * do the superblock for an incrementally recovered device
+ * written out.
+ */
+ rdev_for_each(rdev, mddev)
+ if (!mddev->degraded ||
+ test_bit(In_sync, &rdev->flags))
+ rdev->saved_raid_disk = -1;
+
+ md_update_sb(mddev, 1);
+ clear_bit(MD_RECOVERY_RUNNING, &mddev->recovery);
+ clear_bit(MD_RECOVERY_SYNC, &mddev->recovery);
+ clear_bit(MD_RECOVERY_RESHAPE, &mddev->recovery);
+ clear_bit(MD_RECOVERY_REQUESTED, &mddev->recovery);
+ clear_bit(MD_RECOVERY_CHECK, &mddev->recovery);
+ /* flag recovery needed just to double check */
+ set_bit(MD_RECOVERY_NEEDED, &mddev->recovery);
+ sysfs_notify_dirent_safe(mddev->sysfs_action);
+ md_new_event(mddev);
+ if (mddev->event_work.func)
+ queue_work(md_misc_wq, &mddev->event_work);
+}
+
void md_wait_for_blocked_rdev(struct md_rdev *rdev, struct mddev *mddev)
{
sysfs_notify_dirent_safe(rdev->sysfs_state);
EXPORT_SYMBOL(md_unregister_thread);
EXPORT_SYMBOL(md_wakeup_thread);
EXPORT_SYMBOL(md_check_recovery);
+EXPORT_SYMBOL(md_reap_sync_thread);
MODULE_LICENSE("GPL");
MODULE_DESCRIPTION("MD RAID framework");
MODULE_ALIAS("md");
projects / platform / adaptation / renesas_rcar / renesas_kernel.git / blobdiff