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drbd: Fix IO resuming after connection was established while executing the fence handler

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Signed-off-by: Philipp Reisner <philipp.reisner@linbit.com>
Signed-off-by: Lars Ellenberg <lars.ellenberg@linbit.com>
This commit is contained in:
Philipp Reisner 2012-08-27 17:16:21 +02:00
parent b792b655cd
commit 88f79ec4ae
1 changed files with 22 additions and 15 deletions
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37
drivers/block/drbd/drbd_state.c
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@ -1204,6 +1204,28 @@ static void after_state_ch(struct drbd_conf *mdev, union drbd_state os,
}
}
if (ns.susp_fen) {
struct drbd_tconn *tconn = mdev->tconn;
spin_lock_irq(&tconn->req_lock);
if (tconn->susp_fen && conn_lowest_conn(tconn) >= C_CONNECTED) {
/* case2: The connection was established again: */
struct drbd_conf *odev;
int vnr;
rcu_read_lock();
idr_for_each_entry(&tconn->volumes, odev, vnr)
clear_bit(NEW_CUR_UUID, &odev->flags);
rcu_read_unlock();
_tl_restart(tconn, RESEND);
_conn_request_state(tconn,
(union drbd_state) { { .susp_fen = 1 } },
(union drbd_state) { { .susp_fen = 0 } },
CS_VERBOSE);
}
spin_unlock_irq(&tconn->req_lock);
}
/* Became sync source. With protocol >= 96, we still need to send out
* the sync uuid now. Need to do that before any drbd_send_state, or
* the other side may go "paused sync" before receiving the sync uuids,
@ -1475,7 +1497,6 @@ static int w_after_conn_state_ch(struct drbd_work *w, int unused)
struct drbd_tconn *tconn = w->tconn;
enum drbd_conns oc = acscw->oc;
union drbd_state ns_max = acscw->ns_max;
union drbd_state ns_min = acscw->ns_min;
struct drbd_conf *mdev;
int vnr;
@ -1519,20 +1540,6 @@ static int w_after_conn_state_ch(struct drbd_work *w, int unused)
CS_VERBOSE);
spin_unlock_irq(&tconn->req_lock);
}
/* case2: The connection was established again: */
if (ns_min.conn >= C_CONNECTED) {
rcu_read_lock();
idr_for_each_entry(&tconn->volumes, mdev, vnr)
clear_bit(NEW_CUR_UUID, &mdev->flags);
rcu_read_unlock();
spin_lock_irq(&tconn->req_lock);
_tl_restart(tconn, RESEND);
_conn_request_state(tconn,
(union drbd_state) { { .susp_fen = 1 } },
(union drbd_state) { { .susp_fen = 0 } },
CS_VERBOSE);
spin_unlock_irq(&tconn->req_lock);
}
}
kref_put(&tconn->kref, &conn_destroy);
return 0;