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authorNeilBrown <neilb@suse.de>2008-05-23 13:04:36 -0700
committerLinus Torvalds <torvalds@linux-foundation.org>2008-05-24 09:56:10 -0700
commit09a44cc15079f80c1416cde1a1d5b2cdd8f2118a (patch)
tree5a01eeb38627026ace5b8956fdddec08b414cf76
parent698b18c1e8bddf39cbf1ba50792b0fe302dbe6d6 (diff)
md: notify userspace on 'write-pending' changes to array_state
When an array enters write pending, 'array_state' changes, so we must be sure to sysfs_notify. Also, when waiting for user-space to acknowledge 'write-pending' by marking the metadata as dirty, we don't want to wait for MD_CHANGE_DEVS to be cleared as that might not happen. So explicity test for the bits that we are really interested in. Signed-off-by: Neil Brown <neilb@suse.de> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
-rw-r--r--drivers/md/md.c11
1 files changed, 10 insertions, 1 deletions
diff --git a/drivers/md/md.c b/drivers/md/md.c
index d31aa6f33a6a..52f9865096c6 100644
--- a/drivers/md/md.c
+++ b/drivers/md/md.c
@@ -5435,8 +5435,11 @@ void md_write_start(mddev_t *mddev, struct bio *bi)
md_wakeup_thread(mddev->thread);
}
spin_unlock_irq(&mddev->write_lock);
+ sysfs_notify(&mddev->kobj, NULL, "array_state");
}
- wait_event(mddev->sb_wait, mddev->flags==0);
+ wait_event(mddev->sb_wait,
+ !test_bit(MD_CHANGE_CLEAN, &mddev->flags) &&
+ !test_bit(MD_CHANGE_PENDING, &mddev->flags));
}
void md_write_end(mddev_t *mddev)
@@ -5471,6 +5474,12 @@ void md_allow_write(mddev_t *mddev)
mddev->safemode = 1;
spin_unlock_irq(&mddev->write_lock);
md_update_sb(mddev, 0);
+
+ sysfs_notify(&mddev->kobj, NULL, "array_state");
+ /* wait for the dirty state to be recorded in the metadata */
+ wait_event(mddev->sb_wait,
+ !test_bit(MD_CHANGE_CLEAN, &mddev->flags) &&
+ !test_bit(MD_CHANGE_PENDING, &mddev->flags));
} else
spin_unlock_irq(&mddev->write_lock);
}