Also, when userspace writes 'active', clear all mddev->flags to satisfy
md_write_start (the other bits do not matter to external-metadata arrays).
Signed-off-by: Dan Williams <dan.j.williams@xxxxxxxxx>
---
drivers/md/md.c | 19 +++++++++++++++----
1 files changed, 15 insertions(+), 4 deletions(-)
diff --git a/drivers/md/md.c b/drivers/md/md.c
index 6859bcd..ad53035 100644
--- a/drivers/md/md.c
+++ b/drivers/md/md.c
@@ -2664,7 +2664,7 @@ array_state_store(mddev_t *mddev, const char *buf, size_t len)
if (mddev->pers) {
restart_array(mddev);
if (mddev->external)
- clear_bit(MD_CHANGE_CLEAN, &mddev->flags);
+ mddev->flags = 0;
wake_up(&mddev->sb_wait);
err = 0;
} else {
@@ -5413,9 +5413,14 @@ void md_write_start(mddev_t *mddev, struct bio *bi)
if (mddev->in_sync) {
mddev->in_sync = 0;
set_bit(MD_CHANGE_CLEAN, &mddev->flags);
+ spin_unlock_irq(&mddev->write_lock);
+
+ /* notify userspace to handle clean->dirty */
+ if (mddev->external)
+ sysfs_notify(&mddev->kobj, NULL, "array_state");
md_wakeup_thread(mddev->thread);
- }
- spin_unlock_irq(&mddev->write_lock);
+ } else
+ spin_unlock_irq(&mddev->write_lock);
}
wait_event(mddev->sb_wait, mddev->flags==0);
}
@@ -5451,7 +5456,13 @@ void md_allow_write(mddev_t *mddev)
mddev->safemode == 0)
mddev->safemode = 1;
spin_unlock_irq(&mddev->write_lock);
- md_update_sb(mddev, 0);
+
+ /* wait for the dirty state to be recorded in the metadata */
+ if (mddev->external) {
+ sysfs_notify(&mddev->kobj, NULL, "array_state");
+ wait_event(mddev->sb_wait, mddev->flags == 0);
+ } else
+ md_update_sb(mddev, 0);
} else
spin_unlock_irq(&mddev->write_lock);
}
--
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