1710 lines
48 KiB
C
1710 lines
48 KiB
C
/*
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drbd_state.c
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This file is part of DRBD by Philipp Reisner and Lars Ellenberg.
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Copyright (C) 2001-2008, LINBIT Information Technologies GmbH.
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Copyright (C) 1999-2008, Philipp Reisner <philipp.reisner@linbit.com>.
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Copyright (C) 2002-2008, Lars Ellenberg <lars.ellenberg@linbit.com>.
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Thanks to Carter Burden, Bart Grantham and Gennadiy Nerubayev
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from Logicworks, Inc. for making SDP replication support possible.
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drbd is free software; you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation; either version 2, or (at your option)
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any later version.
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drbd is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with drbd; see the file COPYING. If not, write to
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the Free Software Foundation, 675 Mass Ave, Cambridge, MA 02139, USA.
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*/
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#include <linux/drbd_limits.h>
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#include "drbd_int.h"
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#include "drbd_req.h"
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struct after_state_chg_work {
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struct drbd_work w;
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union drbd_state os;
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union drbd_state ns;
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enum chg_state_flags flags;
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struct completion *done;
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};
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static int w_after_state_ch(struct drbd_work *w, int unused);
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static void after_state_ch(struct drbd_conf *mdev, union drbd_state os,
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union drbd_state ns, enum chg_state_flags flags);
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static enum drbd_state_rv is_valid_state(struct drbd_conf *, union drbd_state);
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static enum drbd_state_rv is_valid_soft_transition(union drbd_state, union drbd_state);
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static enum drbd_state_rv is_valid_transition(union drbd_state os, union drbd_state ns);
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static union drbd_state sanitize_state(struct drbd_conf *mdev, union drbd_state ns,
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const char **warn_sync_abort);
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static inline bool is_susp(union drbd_state s)
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{
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return s.susp || s.susp_nod || s.susp_fen;
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}
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bool conn_all_vols_unconf(struct drbd_tconn *tconn)
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{
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struct drbd_conf *mdev;
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bool rv = true;
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int vnr;
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rcu_read_lock();
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idr_for_each_entry(&tconn->volumes, mdev, vnr) {
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if (mdev->state.disk != D_DISKLESS ||
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mdev->state.conn != C_STANDALONE ||
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mdev->state.role != R_SECONDARY) {
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rv = false;
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break;
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}
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}
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rcu_read_unlock();
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return rv;
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}
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/* Unfortunately the states where not correctly ordered, when
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they where defined. therefore can not use max_t() here. */
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static enum drbd_role max_role(enum drbd_role role1, enum drbd_role role2)
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{
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if (role1 == R_PRIMARY || role2 == R_PRIMARY)
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return R_PRIMARY;
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if (role1 == R_SECONDARY || role2 == R_SECONDARY)
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return R_SECONDARY;
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return R_UNKNOWN;
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}
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static enum drbd_role min_role(enum drbd_role role1, enum drbd_role role2)
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{
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if (role1 == R_UNKNOWN || role2 == R_UNKNOWN)
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return R_UNKNOWN;
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if (role1 == R_SECONDARY || role2 == R_SECONDARY)
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return R_SECONDARY;
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return R_PRIMARY;
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}
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enum drbd_role conn_highest_role(struct drbd_tconn *tconn)
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{
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enum drbd_role role = R_UNKNOWN;
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struct drbd_conf *mdev;
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int vnr;
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rcu_read_lock();
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idr_for_each_entry(&tconn->volumes, mdev, vnr)
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role = max_role(role, mdev->state.role);
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rcu_read_unlock();
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return role;
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}
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enum drbd_role conn_highest_peer(struct drbd_tconn *tconn)
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{
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enum drbd_role peer = R_UNKNOWN;
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struct drbd_conf *mdev;
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int vnr;
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rcu_read_lock();
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idr_for_each_entry(&tconn->volumes, mdev, vnr)
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peer = max_role(peer, mdev->state.peer);
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rcu_read_unlock();
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return peer;
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}
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enum drbd_disk_state conn_highest_disk(struct drbd_tconn *tconn)
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{
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enum drbd_disk_state ds = D_DISKLESS;
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struct drbd_conf *mdev;
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int vnr;
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rcu_read_lock();
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idr_for_each_entry(&tconn->volumes, mdev, vnr)
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ds = max_t(enum drbd_disk_state, ds, mdev->state.disk);
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rcu_read_unlock();
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return ds;
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}
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enum drbd_disk_state conn_lowest_disk(struct drbd_tconn *tconn)
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{
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enum drbd_disk_state ds = D_MASK;
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struct drbd_conf *mdev;
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int vnr;
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rcu_read_lock();
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idr_for_each_entry(&tconn->volumes, mdev, vnr)
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ds = min_t(enum drbd_disk_state, ds, mdev->state.disk);
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rcu_read_unlock();
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return ds;
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}
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enum drbd_disk_state conn_highest_pdsk(struct drbd_tconn *tconn)
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{
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enum drbd_disk_state ds = D_DISKLESS;
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struct drbd_conf *mdev;
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int vnr;
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rcu_read_lock();
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idr_for_each_entry(&tconn->volumes, mdev, vnr)
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ds = max_t(enum drbd_disk_state, ds, mdev->state.pdsk);
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rcu_read_unlock();
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return ds;
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}
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enum drbd_conns conn_lowest_conn(struct drbd_tconn *tconn)
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{
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enum drbd_conns conn = C_MASK;
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struct drbd_conf *mdev;
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int vnr;
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rcu_read_lock();
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idr_for_each_entry(&tconn->volumes, mdev, vnr)
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conn = min_t(enum drbd_conns, conn, mdev->state.conn);
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rcu_read_unlock();
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return conn;
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}
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/**
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* cl_wide_st_chg() - true if the state change is a cluster wide one
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* @mdev: DRBD device.
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* @os: old (current) state.
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* @ns: new (wanted) state.
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*/
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static int cl_wide_st_chg(struct drbd_conf *mdev,
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union drbd_state os, union drbd_state ns)
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{
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return (os.conn >= C_CONNECTED && ns.conn >= C_CONNECTED &&
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((os.role != R_PRIMARY && ns.role == R_PRIMARY) ||
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(os.conn != C_STARTING_SYNC_T && ns.conn == C_STARTING_SYNC_T) ||
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(os.conn != C_STARTING_SYNC_S && ns.conn == C_STARTING_SYNC_S) ||
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(os.disk != D_DISKLESS && ns.disk == D_DISKLESS))) ||
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(os.conn >= C_CONNECTED && ns.conn == C_DISCONNECTING) ||
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(os.conn == C_CONNECTED && ns.conn == C_VERIFY_S);
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}
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static union drbd_state
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apply_mask_val(union drbd_state os, union drbd_state mask, union drbd_state val)
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{
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union drbd_state ns;
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ns.i = (os.i & ~mask.i) | val.i;
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return ns;
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}
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enum drbd_state_rv
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drbd_change_state(struct drbd_conf *mdev, enum chg_state_flags f,
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union drbd_state mask, union drbd_state val)
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{
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unsigned long flags;
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union drbd_state ns;
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enum drbd_state_rv rv;
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spin_lock_irqsave(&mdev->tconn->req_lock, flags);
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ns = apply_mask_val(drbd_read_state(mdev), mask, val);
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rv = _drbd_set_state(mdev, ns, f, NULL);
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spin_unlock_irqrestore(&mdev->tconn->req_lock, flags);
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return rv;
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}
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/**
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* drbd_force_state() - Impose a change which happens outside our control on our state
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* @mdev: DRBD device.
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* @mask: mask of state bits to change.
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* @val: value of new state bits.
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*/
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void drbd_force_state(struct drbd_conf *mdev,
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union drbd_state mask, union drbd_state val)
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{
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drbd_change_state(mdev, CS_HARD, mask, val);
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}
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static enum drbd_state_rv
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_req_st_cond(struct drbd_conf *mdev, union drbd_state mask,
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union drbd_state val)
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{
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union drbd_state os, ns;
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unsigned long flags;
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enum drbd_state_rv rv;
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if (test_and_clear_bit(CL_ST_CHG_SUCCESS, &mdev->flags))
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return SS_CW_SUCCESS;
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if (test_and_clear_bit(CL_ST_CHG_FAIL, &mdev->flags))
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return SS_CW_FAILED_BY_PEER;
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spin_lock_irqsave(&mdev->tconn->req_lock, flags);
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os = drbd_read_state(mdev);
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ns = sanitize_state(mdev, apply_mask_val(os, mask, val), NULL);
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rv = is_valid_transition(os, ns);
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if (rv == SS_SUCCESS)
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rv = SS_UNKNOWN_ERROR; /* cont waiting, otherwise fail. */
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if (!cl_wide_st_chg(mdev, os, ns))
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rv = SS_CW_NO_NEED;
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if (rv == SS_UNKNOWN_ERROR) {
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rv = is_valid_state(mdev, ns);
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if (rv == SS_SUCCESS) {
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rv = is_valid_soft_transition(os, ns);
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if (rv == SS_SUCCESS)
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rv = SS_UNKNOWN_ERROR; /* cont waiting, otherwise fail. */
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}
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}
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spin_unlock_irqrestore(&mdev->tconn->req_lock, flags);
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return rv;
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}
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/**
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* drbd_req_state() - Perform an eventually cluster wide state change
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* @mdev: DRBD device.
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* @mask: mask of state bits to change.
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* @val: value of new state bits.
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* @f: flags
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*
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* Should not be called directly, use drbd_request_state() or
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* _drbd_request_state().
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*/
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static enum drbd_state_rv
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drbd_req_state(struct drbd_conf *mdev, union drbd_state mask,
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union drbd_state val, enum chg_state_flags f)
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{
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struct completion done;
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unsigned long flags;
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union drbd_state os, ns;
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enum drbd_state_rv rv;
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init_completion(&done);
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if (f & CS_SERIALIZE)
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mutex_lock(mdev->state_mutex);
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spin_lock_irqsave(&mdev->tconn->req_lock, flags);
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os = drbd_read_state(mdev);
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ns = sanitize_state(mdev, apply_mask_val(os, mask, val), NULL);
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rv = is_valid_transition(os, ns);
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if (rv < SS_SUCCESS) {
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spin_unlock_irqrestore(&mdev->tconn->req_lock, flags);
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goto abort;
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}
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if (cl_wide_st_chg(mdev, os, ns)) {
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rv = is_valid_state(mdev, ns);
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if (rv == SS_SUCCESS)
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rv = is_valid_soft_transition(os, ns);
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spin_unlock_irqrestore(&mdev->tconn->req_lock, flags);
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if (rv < SS_SUCCESS) {
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if (f & CS_VERBOSE)
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print_st_err(mdev, os, ns, rv);
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goto abort;
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}
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if (drbd_send_state_req(mdev, mask, val)) {
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rv = SS_CW_FAILED_BY_PEER;
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if (f & CS_VERBOSE)
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print_st_err(mdev, os, ns, rv);
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goto abort;
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}
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wait_event(mdev->state_wait,
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(rv = _req_st_cond(mdev, mask, val)));
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if (rv < SS_SUCCESS) {
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if (f & CS_VERBOSE)
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print_st_err(mdev, os, ns, rv);
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goto abort;
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}
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spin_lock_irqsave(&mdev->tconn->req_lock, flags);
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ns = apply_mask_val(drbd_read_state(mdev), mask, val);
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rv = _drbd_set_state(mdev, ns, f, &done);
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} else {
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rv = _drbd_set_state(mdev, ns, f, &done);
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}
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spin_unlock_irqrestore(&mdev->tconn->req_lock, flags);
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if (f & CS_WAIT_COMPLETE && rv == SS_SUCCESS) {
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D_ASSERT(current != mdev->tconn->worker.task);
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wait_for_completion(&done);
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}
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abort:
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if (f & CS_SERIALIZE)
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mutex_unlock(mdev->state_mutex);
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return rv;
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}
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/**
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* _drbd_request_state() - Request a state change (with flags)
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* @mdev: DRBD device.
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* @mask: mask of state bits to change.
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* @val: value of new state bits.
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* @f: flags
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*
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* Cousin of drbd_request_state(), useful with the CS_WAIT_COMPLETE
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* flag, or when logging of failed state change requests is not desired.
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*/
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enum drbd_state_rv
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_drbd_request_state(struct drbd_conf *mdev, union drbd_state mask,
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union drbd_state val, enum chg_state_flags f)
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{
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enum drbd_state_rv rv;
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wait_event(mdev->state_wait,
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(rv = drbd_req_state(mdev, mask, val, f)) != SS_IN_TRANSIENT_STATE);
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return rv;
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}
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static void print_st(struct drbd_conf *mdev, char *name, union drbd_state ns)
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{
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dev_err(DEV, " %s = { cs:%s ro:%s/%s ds:%s/%s %c%c%c%c%c%c }\n",
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name,
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drbd_conn_str(ns.conn),
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drbd_role_str(ns.role),
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drbd_role_str(ns.peer),
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drbd_disk_str(ns.disk),
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drbd_disk_str(ns.pdsk),
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is_susp(ns) ? 's' : 'r',
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ns.aftr_isp ? 'a' : '-',
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ns.peer_isp ? 'p' : '-',
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ns.user_isp ? 'u' : '-',
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ns.susp_fen ? 'F' : '-',
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ns.susp_nod ? 'N' : '-'
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);
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}
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void print_st_err(struct drbd_conf *mdev, union drbd_state os,
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union drbd_state ns, enum drbd_state_rv err)
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{
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if (err == SS_IN_TRANSIENT_STATE)
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return;
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dev_err(DEV, "State change failed: %s\n", drbd_set_st_err_str(err));
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print_st(mdev, " state", os);
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print_st(mdev, "wanted", ns);
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}
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static long print_state_change(char *pb, union drbd_state os, union drbd_state ns,
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enum chg_state_flags flags)
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{
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char *pbp;
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pbp = pb;
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*pbp = 0;
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if (ns.role != os.role && flags & CS_DC_ROLE)
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pbp += sprintf(pbp, "role( %s -> %s ) ",
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drbd_role_str(os.role),
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drbd_role_str(ns.role));
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if (ns.peer != os.peer && flags & CS_DC_PEER)
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pbp += sprintf(pbp, "peer( %s -> %s ) ",
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drbd_role_str(os.peer),
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drbd_role_str(ns.peer));
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if (ns.conn != os.conn && flags & CS_DC_CONN)
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pbp += sprintf(pbp, "conn( %s -> %s ) ",
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drbd_conn_str(os.conn),
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drbd_conn_str(ns.conn));
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if (ns.disk != os.disk && flags & CS_DC_DISK)
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pbp += sprintf(pbp, "disk( %s -> %s ) ",
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drbd_disk_str(os.disk),
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drbd_disk_str(ns.disk));
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if (ns.pdsk != os.pdsk && flags & CS_DC_PDSK)
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pbp += sprintf(pbp, "pdsk( %s -> %s ) ",
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drbd_disk_str(os.pdsk),
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drbd_disk_str(ns.pdsk));
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return pbp - pb;
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}
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|
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static void drbd_pr_state_change(struct drbd_conf *mdev, union drbd_state os, union drbd_state ns,
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enum chg_state_flags flags)
|
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{
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char pb[300];
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char *pbp = pb;
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pbp += print_state_change(pbp, os, ns, flags ^ CS_DC_MASK);
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if (ns.aftr_isp != os.aftr_isp)
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pbp += sprintf(pbp, "aftr_isp( %d -> %d ) ",
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os.aftr_isp,
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ns.aftr_isp);
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if (ns.peer_isp != os.peer_isp)
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pbp += sprintf(pbp, "peer_isp( %d -> %d ) ",
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os.peer_isp,
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ns.peer_isp);
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if (ns.user_isp != os.user_isp)
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pbp += sprintf(pbp, "user_isp( %d -> %d ) ",
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os.user_isp,
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ns.user_isp);
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if (pbp != pb)
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dev_info(DEV, "%s\n", pb);
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}
|
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|
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static void conn_pr_state_change(struct drbd_tconn *tconn, union drbd_state os, union drbd_state ns,
|
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enum chg_state_flags flags)
|
|
{
|
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char pb[300];
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char *pbp = pb;
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|
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pbp += print_state_change(pbp, os, ns, flags);
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|
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if (is_susp(ns) != is_susp(os) && flags & CS_DC_SUSP)
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pbp += sprintf(pbp, "susp( %d -> %d ) ",
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is_susp(os),
|
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is_susp(ns));
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|
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if (pbp != pb)
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conn_info(tconn, "%s\n", pb);
|
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}
|
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|
|
|
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/**
|
|
* is_valid_state() - Returns an SS_ error code if ns is not valid
|
|
* @mdev: DRBD device.
|
|
* @ns: State to consider.
|
|
*/
|
|
static enum drbd_state_rv
|
|
is_valid_state(struct drbd_conf *mdev, union drbd_state ns)
|
|
{
|
|
/* See drbd_state_sw_errors in drbd_strings.c */
|
|
|
|
enum drbd_fencing_p fp;
|
|
enum drbd_state_rv rv = SS_SUCCESS;
|
|
struct net_conf *nc;
|
|
|
|
rcu_read_lock();
|
|
fp = FP_DONT_CARE;
|
|
if (get_ldev(mdev)) {
|
|
fp = rcu_dereference(mdev->ldev->disk_conf)->fencing;
|
|
put_ldev(mdev);
|
|
}
|
|
|
|
nc = rcu_dereference(mdev->tconn->net_conf);
|
|
if (nc) {
|
|
if (!nc->two_primaries && ns.role == R_PRIMARY) {
|
|
if (ns.peer == R_PRIMARY)
|
|
rv = SS_TWO_PRIMARIES;
|
|
else if (conn_highest_peer(mdev->tconn) == R_PRIMARY)
|
|
rv = SS_O_VOL_PEER_PRI;
|
|
}
|
|
}
|
|
|
|
if (rv <= 0)
|
|
/* already found a reason to abort */;
|
|
else if (ns.role == R_SECONDARY && mdev->open_cnt)
|
|
rv = SS_DEVICE_IN_USE;
|
|
|
|
else if (ns.role == R_PRIMARY && ns.conn < C_CONNECTED && ns.disk < D_UP_TO_DATE)
|
|
rv = SS_NO_UP_TO_DATE_DISK;
|
|
|
|
else if (fp >= FP_RESOURCE &&
|
|
ns.role == R_PRIMARY && ns.conn < C_CONNECTED && ns.pdsk >= D_UNKNOWN)
|
|
rv = SS_PRIMARY_NOP;
|
|
|
|
else if (ns.role == R_PRIMARY && ns.disk <= D_INCONSISTENT && ns.pdsk <= D_INCONSISTENT)
|
|
rv = SS_NO_UP_TO_DATE_DISK;
|
|
|
|
else if (ns.conn > C_CONNECTED && ns.disk < D_INCONSISTENT)
|
|
rv = SS_NO_LOCAL_DISK;
|
|
|
|
else if (ns.conn > C_CONNECTED && ns.pdsk < D_INCONSISTENT)
|
|
rv = SS_NO_REMOTE_DISK;
|
|
|
|
else if (ns.conn > C_CONNECTED && ns.disk < D_UP_TO_DATE && ns.pdsk < D_UP_TO_DATE)
|
|
rv = SS_NO_UP_TO_DATE_DISK;
|
|
|
|
else if ((ns.conn == C_CONNECTED ||
|
|
ns.conn == C_WF_BITMAP_S ||
|
|
ns.conn == C_SYNC_SOURCE ||
|
|
ns.conn == C_PAUSED_SYNC_S) &&
|
|
ns.disk == D_OUTDATED)
|
|
rv = SS_CONNECTED_OUTDATES;
|
|
|
|
else if ((ns.conn == C_VERIFY_S || ns.conn == C_VERIFY_T) &&
|
|
(nc->verify_alg[0] == 0))
|
|
rv = SS_NO_VERIFY_ALG;
|
|
|
|
else if ((ns.conn == C_VERIFY_S || ns.conn == C_VERIFY_T) &&
|
|
mdev->tconn->agreed_pro_version < 88)
|
|
rv = SS_NOT_SUPPORTED;
|
|
|
|
else if (ns.conn >= C_CONNECTED && ns.pdsk == D_UNKNOWN)
|
|
rv = SS_CONNECTED_OUTDATES;
|
|
|
|
rcu_read_unlock();
|
|
|
|
return rv;
|
|
}
|
|
|
|
/**
|
|
* is_valid_soft_transition() - Returns an SS_ error code if the state transition is not possible
|
|
* This function limits state transitions that may be declined by DRBD. I.e.
|
|
* user requests (aka soft transitions).
|
|
* @mdev: DRBD device.
|
|
* @ns: new state.
|
|
* @os: old state.
|
|
*/
|
|
static enum drbd_state_rv
|
|
is_valid_soft_transition(union drbd_state os, union drbd_state ns)
|
|
{
|
|
enum drbd_state_rv rv = SS_SUCCESS;
|
|
|
|
if ((ns.conn == C_STARTING_SYNC_T || ns.conn == C_STARTING_SYNC_S) &&
|
|
os.conn > C_CONNECTED)
|
|
rv = SS_RESYNC_RUNNING;
|
|
|
|
if (ns.conn == C_DISCONNECTING && os.conn == C_STANDALONE)
|
|
rv = SS_ALREADY_STANDALONE;
|
|
|
|
if (ns.disk > D_ATTACHING && os.disk == D_DISKLESS)
|
|
rv = SS_IS_DISKLESS;
|
|
|
|
if (ns.conn == C_WF_CONNECTION && os.conn < C_UNCONNECTED)
|
|
rv = SS_NO_NET_CONFIG;
|
|
|
|
if (ns.disk == D_OUTDATED && os.disk < D_OUTDATED && os.disk != D_ATTACHING)
|
|
rv = SS_LOWER_THAN_OUTDATED;
|
|
|
|
if (ns.conn == C_DISCONNECTING && os.conn == C_UNCONNECTED)
|
|
rv = SS_IN_TRANSIENT_STATE;
|
|
|
|
/* if (ns.conn == os.conn && ns.conn == C_WF_REPORT_PARAMS)
|
|
rv = SS_IN_TRANSIENT_STATE; */
|
|
|
|
if ((ns.conn == C_VERIFY_S || ns.conn == C_VERIFY_T) && os.conn < C_CONNECTED)
|
|
rv = SS_NEED_CONNECTION;
|
|
|
|
if ((ns.conn == C_VERIFY_S || ns.conn == C_VERIFY_T) &&
|
|
ns.conn != os.conn && os.conn > C_CONNECTED)
|
|
rv = SS_RESYNC_RUNNING;
|
|
|
|
if ((ns.conn == C_STARTING_SYNC_S || ns.conn == C_STARTING_SYNC_T) &&
|
|
os.conn < C_CONNECTED)
|
|
rv = SS_NEED_CONNECTION;
|
|
|
|
if ((ns.conn == C_SYNC_TARGET || ns.conn == C_SYNC_SOURCE)
|
|
&& os.conn < C_WF_REPORT_PARAMS)
|
|
rv = SS_NEED_CONNECTION; /* No NetworkFailure -> SyncTarget etc... */
|
|
|
|
return rv;
|
|
}
|
|
|
|
static enum drbd_state_rv
|
|
is_valid_conn_transition(enum drbd_conns oc, enum drbd_conns nc)
|
|
{
|
|
/* no change -> nothing to do, at least for the connection part */
|
|
if (oc == nc)
|
|
return SS_NOTHING_TO_DO;
|
|
|
|
/* disconnect of an unconfigured connection does not make sense */
|
|
if (oc == C_STANDALONE && nc == C_DISCONNECTING)
|
|
return SS_ALREADY_STANDALONE;
|
|
|
|
/* from C_STANDALONE, we start with C_UNCONNECTED */
|
|
if (oc == C_STANDALONE && nc != C_UNCONNECTED)
|
|
return SS_NEED_CONNECTION;
|
|
|
|
/* After a network error only C_UNCONNECTED or C_DISCONNECTING may follow. */
|
|
if (oc >= C_TIMEOUT && oc <= C_TEAR_DOWN && nc != C_UNCONNECTED && nc != C_DISCONNECTING)
|
|
return SS_IN_TRANSIENT_STATE;
|
|
|
|
/* After C_DISCONNECTING only C_STANDALONE may follow */
|
|
if (oc == C_DISCONNECTING && nc != C_STANDALONE)
|
|
return SS_IN_TRANSIENT_STATE;
|
|
|
|
return SS_SUCCESS;
|
|
}
|
|
|
|
|
|
/**
|
|
* is_valid_transition() - Returns an SS_ error code if the state transition is not possible
|
|
* This limits hard state transitions. Hard state transitions are facts there are
|
|
* imposed on DRBD by the environment. E.g. disk broke or network broke down.
|
|
* But those hard state transitions are still not allowed to do everything.
|
|
* @ns: new state.
|
|
* @os: old state.
|
|
*/
|
|
static enum drbd_state_rv
|
|
is_valid_transition(union drbd_state os, union drbd_state ns)
|
|
{
|
|
enum drbd_state_rv rv;
|
|
|
|
rv = is_valid_conn_transition(os.conn, ns.conn);
|
|
|
|
/* we cannot fail (again) if we already detached */
|
|
if (ns.disk == D_FAILED && os.disk == D_DISKLESS)
|
|
rv = SS_IS_DISKLESS;
|
|
|
|
/* if we are only D_ATTACHING yet,
|
|
* we can (and should) go directly to D_DISKLESS. */
|
|
if (ns.disk == D_FAILED && os.disk == D_ATTACHING) {
|
|
printk("TODO: FIX ME\n");
|
|
rv = SS_IS_DISKLESS;
|
|
}
|
|
|
|
return rv;
|
|
}
|
|
|
|
/**
|
|
* sanitize_state() - Resolves implicitly necessary additional changes to a state transition
|
|
* @mdev: DRBD device.
|
|
* @os: old state.
|
|
* @ns: new state.
|
|
* @warn_sync_abort:
|
|
*
|
|
* When we loose connection, we have to set the state of the peers disk (pdsk)
|
|
* to D_UNKNOWN. This rule and many more along those lines are in this function.
|
|
*/
|
|
static union drbd_state sanitize_state(struct drbd_conf *mdev, union drbd_state ns,
|
|
const char **warn_sync_abort)
|
|
{
|
|
enum drbd_fencing_p fp;
|
|
enum drbd_disk_state disk_min, disk_max, pdsk_min, pdsk_max;
|
|
|
|
fp = FP_DONT_CARE;
|
|
if (get_ldev(mdev)) {
|
|
rcu_read_lock();
|
|
fp = rcu_dereference(mdev->ldev->disk_conf)->fencing;
|
|
rcu_read_unlock();
|
|
put_ldev(mdev);
|
|
}
|
|
|
|
/* Implications from connection to peer and peer_isp */
|
|
if (ns.conn < C_CONNECTED) {
|
|
ns.peer_isp = 0;
|
|
ns.peer = R_UNKNOWN;
|
|
if (ns.pdsk > D_UNKNOWN || ns.pdsk < D_INCONSISTENT)
|
|
ns.pdsk = D_UNKNOWN;
|
|
}
|
|
|
|
/* Clear the aftr_isp when becoming unconfigured */
|
|
if (ns.conn == C_STANDALONE && ns.disk == D_DISKLESS && ns.role == R_SECONDARY)
|
|
ns.aftr_isp = 0;
|
|
|
|
/* An implication of the disk states onto the connection state */
|
|
/* Abort resync if a disk fails/detaches */
|
|
if (ns.conn > C_CONNECTED && (ns.disk <= D_FAILED || ns.pdsk <= D_FAILED)) {
|
|
if (warn_sync_abort)
|
|
*warn_sync_abort =
|
|
ns.conn == C_VERIFY_S || ns.conn == C_VERIFY_T ?
|
|
"Online-verify" : "Resync";
|
|
ns.conn = C_CONNECTED;
|
|
}
|
|
|
|
/* Connection breaks down before we finished "Negotiating" */
|
|
if (ns.conn < C_CONNECTED && ns.disk == D_NEGOTIATING &&
|
|
get_ldev_if_state(mdev, D_NEGOTIATING)) {
|
|
if (mdev->ed_uuid == mdev->ldev->md.uuid[UI_CURRENT]) {
|
|
ns.disk = mdev->new_state_tmp.disk;
|
|
ns.pdsk = mdev->new_state_tmp.pdsk;
|
|
} else {
|
|
dev_alert(DEV, "Connection lost while negotiating, no data!\n");
|
|
ns.disk = D_DISKLESS;
|
|
ns.pdsk = D_UNKNOWN;
|
|
}
|
|
put_ldev(mdev);
|
|
}
|
|
|
|
/* D_CONSISTENT and D_OUTDATED vanish when we get connected */
|
|
if (ns.conn >= C_CONNECTED && ns.conn < C_AHEAD) {
|
|
if (ns.disk == D_CONSISTENT || ns.disk == D_OUTDATED)
|
|
ns.disk = D_UP_TO_DATE;
|
|
if (ns.pdsk == D_CONSISTENT || ns.pdsk == D_OUTDATED)
|
|
ns.pdsk = D_UP_TO_DATE;
|
|
}
|
|
|
|
/* Implications of the connection stat on the disk states */
|
|
disk_min = D_DISKLESS;
|
|
disk_max = D_UP_TO_DATE;
|
|
pdsk_min = D_INCONSISTENT;
|
|
pdsk_max = D_UNKNOWN;
|
|
switch ((enum drbd_conns)ns.conn) {
|
|
case C_WF_BITMAP_T:
|
|
case C_PAUSED_SYNC_T:
|
|
case C_STARTING_SYNC_T:
|
|
case C_WF_SYNC_UUID:
|
|
case C_BEHIND:
|
|
disk_min = D_INCONSISTENT;
|
|
disk_max = D_OUTDATED;
|
|
pdsk_min = D_UP_TO_DATE;
|
|
pdsk_max = D_UP_TO_DATE;
|
|
break;
|
|
case C_VERIFY_S:
|
|
case C_VERIFY_T:
|
|
disk_min = D_UP_TO_DATE;
|
|
disk_max = D_UP_TO_DATE;
|
|
pdsk_min = D_UP_TO_DATE;
|
|
pdsk_max = D_UP_TO_DATE;
|
|
break;
|
|
case C_CONNECTED:
|
|
disk_min = D_DISKLESS;
|
|
disk_max = D_UP_TO_DATE;
|
|
pdsk_min = D_DISKLESS;
|
|
pdsk_max = D_UP_TO_DATE;
|
|
break;
|
|
case C_WF_BITMAP_S:
|
|
case C_PAUSED_SYNC_S:
|
|
case C_STARTING_SYNC_S:
|
|
case C_AHEAD:
|
|
disk_min = D_UP_TO_DATE;
|
|
disk_max = D_UP_TO_DATE;
|
|
pdsk_min = D_INCONSISTENT;
|
|
pdsk_max = D_CONSISTENT; /* D_OUTDATED would be nice. But explicit outdate necessary*/
|
|
break;
|
|
case C_SYNC_TARGET:
|
|
disk_min = D_INCONSISTENT;
|
|
disk_max = D_INCONSISTENT;
|
|
pdsk_min = D_UP_TO_DATE;
|
|
pdsk_max = D_UP_TO_DATE;
|
|
break;
|
|
case C_SYNC_SOURCE:
|
|
disk_min = D_UP_TO_DATE;
|
|
disk_max = D_UP_TO_DATE;
|
|
pdsk_min = D_INCONSISTENT;
|
|
pdsk_max = D_INCONSISTENT;
|
|
break;
|
|
case C_STANDALONE:
|
|
case C_DISCONNECTING:
|
|
case C_UNCONNECTED:
|
|
case C_TIMEOUT:
|
|
case C_BROKEN_PIPE:
|
|
case C_NETWORK_FAILURE:
|
|
case C_PROTOCOL_ERROR:
|
|
case C_TEAR_DOWN:
|
|
case C_WF_CONNECTION:
|
|
case C_WF_REPORT_PARAMS:
|
|
case C_MASK:
|
|
break;
|
|
}
|
|
if (ns.disk > disk_max)
|
|
ns.disk = disk_max;
|
|
|
|
if (ns.disk < disk_min) {
|
|
dev_warn(DEV, "Implicitly set disk from %s to %s\n",
|
|
drbd_disk_str(ns.disk), drbd_disk_str(disk_min));
|
|
ns.disk = disk_min;
|
|
}
|
|
if (ns.pdsk > pdsk_max)
|
|
ns.pdsk = pdsk_max;
|
|
|
|
if (ns.pdsk < pdsk_min) {
|
|
dev_warn(DEV, "Implicitly set pdsk from %s to %s\n",
|
|
drbd_disk_str(ns.pdsk), drbd_disk_str(pdsk_min));
|
|
ns.pdsk = pdsk_min;
|
|
}
|
|
|
|
if (fp == FP_STONITH &&
|
|
(ns.role == R_PRIMARY && ns.conn < C_CONNECTED && ns.pdsk > D_OUTDATED))
|
|
ns.susp_fen = 1; /* Suspend IO while fence-peer handler runs (peer lost) */
|
|
|
|
if (mdev->tconn->res_opts.on_no_data == OND_SUSPEND_IO &&
|
|
(ns.role == R_PRIMARY && ns.disk < D_UP_TO_DATE && ns.pdsk < D_UP_TO_DATE))
|
|
ns.susp_nod = 1; /* Suspend IO while no data available (no accessible data available) */
|
|
|
|
if (ns.aftr_isp || ns.peer_isp || ns.user_isp) {
|
|
if (ns.conn == C_SYNC_SOURCE)
|
|
ns.conn = C_PAUSED_SYNC_S;
|
|
if (ns.conn == C_SYNC_TARGET)
|
|
ns.conn = C_PAUSED_SYNC_T;
|
|
} else {
|
|
if (ns.conn == C_PAUSED_SYNC_S)
|
|
ns.conn = C_SYNC_SOURCE;
|
|
if (ns.conn == C_PAUSED_SYNC_T)
|
|
ns.conn = C_SYNC_TARGET;
|
|
}
|
|
|
|
return ns;
|
|
}
|
|
|
|
void drbd_resume_al(struct drbd_conf *mdev)
|
|
{
|
|
if (test_and_clear_bit(AL_SUSPENDED, &mdev->flags))
|
|
dev_info(DEV, "Resumed AL updates\n");
|
|
}
|
|
|
|
/* helper for __drbd_set_state */
|
|
static void set_ov_position(struct drbd_conf *mdev, enum drbd_conns cs)
|
|
{
|
|
if (mdev->tconn->agreed_pro_version < 90)
|
|
mdev->ov_start_sector = 0;
|
|
mdev->rs_total = drbd_bm_bits(mdev);
|
|
mdev->ov_position = 0;
|
|
if (cs == C_VERIFY_T) {
|
|
/* starting online verify from an arbitrary position
|
|
* does not fit well into the existing protocol.
|
|
* on C_VERIFY_T, we initialize ov_left and friends
|
|
* implicitly in receive_DataRequest once the
|
|
* first P_OV_REQUEST is received */
|
|
mdev->ov_start_sector = ~(sector_t)0;
|
|
} else {
|
|
unsigned long bit = BM_SECT_TO_BIT(mdev->ov_start_sector);
|
|
if (bit >= mdev->rs_total) {
|
|
mdev->ov_start_sector =
|
|
BM_BIT_TO_SECT(mdev->rs_total - 1);
|
|
mdev->rs_total = 1;
|
|
} else
|
|
mdev->rs_total -= bit;
|
|
mdev->ov_position = mdev->ov_start_sector;
|
|
}
|
|
mdev->ov_left = mdev->rs_total;
|
|
}
|
|
|
|
/**
|
|
* __drbd_set_state() - Set a new DRBD state
|
|
* @mdev: DRBD device.
|
|
* @ns: new state.
|
|
* @flags: Flags
|
|
* @done: Optional completion, that will get completed after the after_state_ch() finished
|
|
*
|
|
* Caller needs to hold req_lock, and global_state_lock. Do not call directly.
|
|
*/
|
|
enum drbd_state_rv
|
|
__drbd_set_state(struct drbd_conf *mdev, union drbd_state ns,
|
|
enum chg_state_flags flags, struct completion *done)
|
|
{
|
|
union drbd_state os;
|
|
enum drbd_state_rv rv = SS_SUCCESS;
|
|
const char *warn_sync_abort = NULL;
|
|
struct after_state_chg_work *ascw;
|
|
|
|
os = drbd_read_state(mdev);
|
|
|
|
ns = sanitize_state(mdev, ns, &warn_sync_abort);
|
|
if (ns.i == os.i)
|
|
return SS_NOTHING_TO_DO;
|
|
|
|
rv = is_valid_transition(os, ns);
|
|
if (rv < SS_SUCCESS)
|
|
return rv;
|
|
|
|
if (!(flags & CS_HARD)) {
|
|
/* pre-state-change checks ; only look at ns */
|
|
/* See drbd_state_sw_errors in drbd_strings.c */
|
|
|
|
rv = is_valid_state(mdev, ns);
|
|
if (rv < SS_SUCCESS) {
|
|
/* If the old state was illegal as well, then let
|
|
this happen...*/
|
|
|
|
if (is_valid_state(mdev, os) == rv)
|
|
rv = is_valid_soft_transition(os, ns);
|
|
} else
|
|
rv = is_valid_soft_transition(os, ns);
|
|
}
|
|
|
|
if (rv < SS_SUCCESS) {
|
|
if (flags & CS_VERBOSE)
|
|
print_st_err(mdev, os, ns, rv);
|
|
return rv;
|
|
}
|
|
|
|
if (warn_sync_abort)
|
|
dev_warn(DEV, "%s aborted.\n", warn_sync_abort);
|
|
|
|
drbd_pr_state_change(mdev, os, ns, flags);
|
|
|
|
/* Display changes to the susp* flags that where caused by the call to
|
|
sanitize_state(). Only display it here if we where not called from
|
|
_conn_request_state() */
|
|
if (!(flags & CS_DC_SUSP))
|
|
conn_pr_state_change(mdev->tconn, os, ns, (flags & ~CS_DC_MASK) | CS_DC_SUSP);
|
|
|
|
/* if we are going -> D_FAILED or D_DISKLESS, grab one extra reference
|
|
* on the ldev here, to be sure the transition -> D_DISKLESS resp.
|
|
* drbd_ldev_destroy() won't happen before our corresponding
|
|
* after_state_ch works run, where we put_ldev again. */
|
|
if ((os.disk != D_FAILED && ns.disk == D_FAILED) ||
|
|
(os.disk != D_DISKLESS && ns.disk == D_DISKLESS))
|
|
atomic_inc(&mdev->local_cnt);
|
|
|
|
mdev->state.i = ns.i;
|
|
mdev->tconn->susp = ns.susp;
|
|
mdev->tconn->susp_nod = ns.susp_nod;
|
|
mdev->tconn->susp_fen = ns.susp_fen;
|
|
|
|
if (os.disk == D_ATTACHING && ns.disk >= D_NEGOTIATING)
|
|
drbd_print_uuids(mdev, "attached to UUIDs");
|
|
|
|
wake_up(&mdev->misc_wait);
|
|
wake_up(&mdev->state_wait);
|
|
wake_up(&mdev->tconn->ping_wait);
|
|
|
|
/* aborted verify run. log the last position */
|
|
if ((os.conn == C_VERIFY_S || os.conn == C_VERIFY_T) &&
|
|
ns.conn < C_CONNECTED) {
|
|
mdev->ov_start_sector =
|
|
BM_BIT_TO_SECT(drbd_bm_bits(mdev) - mdev->ov_left);
|
|
dev_info(DEV, "Online Verify reached sector %llu\n",
|
|
(unsigned long long)mdev->ov_start_sector);
|
|
}
|
|
|
|
if ((os.conn == C_PAUSED_SYNC_T || os.conn == C_PAUSED_SYNC_S) &&
|
|
(ns.conn == C_SYNC_TARGET || ns.conn == C_SYNC_SOURCE)) {
|
|
dev_info(DEV, "Syncer continues.\n");
|
|
mdev->rs_paused += (long)jiffies
|
|
-(long)mdev->rs_mark_time[mdev->rs_last_mark];
|
|
if (ns.conn == C_SYNC_TARGET)
|
|
mod_timer(&mdev->resync_timer, jiffies);
|
|
}
|
|
|
|
if ((os.conn == C_SYNC_TARGET || os.conn == C_SYNC_SOURCE) &&
|
|
(ns.conn == C_PAUSED_SYNC_T || ns.conn == C_PAUSED_SYNC_S)) {
|
|
dev_info(DEV, "Resync suspended\n");
|
|
mdev->rs_mark_time[mdev->rs_last_mark] = jiffies;
|
|
}
|
|
|
|
if (os.conn == C_CONNECTED &&
|
|
(ns.conn == C_VERIFY_S || ns.conn == C_VERIFY_T)) {
|
|
unsigned long now = jiffies;
|
|
int i;
|
|
|
|
set_ov_position(mdev, ns.conn);
|
|
mdev->rs_start = now;
|
|
mdev->rs_last_events = 0;
|
|
mdev->rs_last_sect_ev = 0;
|
|
mdev->ov_last_oos_size = 0;
|
|
mdev->ov_last_oos_start = 0;
|
|
|
|
for (i = 0; i < DRBD_SYNC_MARKS; i++) {
|
|
mdev->rs_mark_left[i] = mdev->ov_left;
|
|
mdev->rs_mark_time[i] = now;
|
|
}
|
|
|
|
drbd_rs_controller_reset(mdev);
|
|
|
|
if (ns.conn == C_VERIFY_S) {
|
|
dev_info(DEV, "Starting Online Verify from sector %llu\n",
|
|
(unsigned long long)mdev->ov_position);
|
|
mod_timer(&mdev->resync_timer, jiffies);
|
|
}
|
|
}
|
|
|
|
if (get_ldev(mdev)) {
|
|
u32 mdf = mdev->ldev->md.flags & ~(MDF_CONSISTENT|MDF_PRIMARY_IND|
|
|
MDF_CONNECTED_IND|MDF_WAS_UP_TO_DATE|
|
|
MDF_PEER_OUT_DATED|MDF_CRASHED_PRIMARY);
|
|
|
|
if (test_bit(CRASHED_PRIMARY, &mdev->flags))
|
|
mdf |= MDF_CRASHED_PRIMARY;
|
|
if (mdev->state.role == R_PRIMARY ||
|
|
(mdev->state.pdsk < D_INCONSISTENT && mdev->state.peer == R_PRIMARY))
|
|
mdf |= MDF_PRIMARY_IND;
|
|
if (mdev->state.conn > C_WF_REPORT_PARAMS)
|
|
mdf |= MDF_CONNECTED_IND;
|
|
if (mdev->state.disk > D_INCONSISTENT)
|
|
mdf |= MDF_CONSISTENT;
|
|
if (mdev->state.disk > D_OUTDATED)
|
|
mdf |= MDF_WAS_UP_TO_DATE;
|
|
if (mdev->state.pdsk <= D_OUTDATED && mdev->state.pdsk >= D_INCONSISTENT)
|
|
mdf |= MDF_PEER_OUT_DATED;
|
|
if (mdf != mdev->ldev->md.flags) {
|
|
mdev->ldev->md.flags = mdf;
|
|
drbd_md_mark_dirty(mdev);
|
|
}
|
|
if (os.disk < D_CONSISTENT && ns.disk >= D_CONSISTENT)
|
|
drbd_set_ed_uuid(mdev, mdev->ldev->md.uuid[UI_CURRENT]);
|
|
put_ldev(mdev);
|
|
}
|
|
|
|
/* Peer was forced D_UP_TO_DATE & R_PRIMARY, consider to resync */
|
|
if (os.disk == D_INCONSISTENT && os.pdsk == D_INCONSISTENT &&
|
|
os.peer == R_SECONDARY && ns.peer == R_PRIMARY)
|
|
set_bit(CONSIDER_RESYNC, &mdev->flags);
|
|
|
|
/* Receiver should clean up itself */
|
|
if (os.conn != C_DISCONNECTING && ns.conn == C_DISCONNECTING)
|
|
drbd_thread_stop_nowait(&mdev->tconn->receiver);
|
|
|
|
/* Now the receiver finished cleaning up itself, it should die */
|
|
if (os.conn != C_STANDALONE && ns.conn == C_STANDALONE)
|
|
drbd_thread_stop_nowait(&mdev->tconn->receiver);
|
|
|
|
/* Upon network failure, we need to restart the receiver. */
|
|
if (os.conn > C_TEAR_DOWN &&
|
|
ns.conn <= C_TEAR_DOWN && ns.conn >= C_TIMEOUT)
|
|
drbd_thread_restart_nowait(&mdev->tconn->receiver);
|
|
|
|
/* Resume AL writing if we get a connection */
|
|
if (os.conn < C_CONNECTED && ns.conn >= C_CONNECTED)
|
|
drbd_resume_al(mdev);
|
|
|
|
ascw = kmalloc(sizeof(*ascw), GFP_ATOMIC);
|
|
if (ascw) {
|
|
ascw->os = os;
|
|
ascw->ns = ns;
|
|
ascw->flags = flags;
|
|
ascw->w.cb = w_after_state_ch;
|
|
ascw->w.mdev = mdev;
|
|
ascw->done = done;
|
|
drbd_queue_work(&mdev->tconn->data.work, &ascw->w);
|
|
} else {
|
|
dev_err(DEV, "Could not kmalloc an ascw\n");
|
|
}
|
|
|
|
return rv;
|
|
}
|
|
|
|
static int w_after_state_ch(struct drbd_work *w, int unused)
|
|
{
|
|
struct after_state_chg_work *ascw =
|
|
container_of(w, struct after_state_chg_work, w);
|
|
struct drbd_conf *mdev = w->mdev;
|
|
|
|
after_state_ch(mdev, ascw->os, ascw->ns, ascw->flags);
|
|
if (ascw->flags & CS_WAIT_COMPLETE) {
|
|
D_ASSERT(ascw->done != NULL);
|
|
complete(ascw->done);
|
|
}
|
|
kfree(ascw);
|
|
|
|
return 0;
|
|
}
|
|
|
|
static void abw_start_sync(struct drbd_conf *mdev, int rv)
|
|
{
|
|
if (rv) {
|
|
dev_err(DEV, "Writing the bitmap failed not starting resync.\n");
|
|
_drbd_request_state(mdev, NS(conn, C_CONNECTED), CS_VERBOSE);
|
|
return;
|
|
}
|
|
|
|
switch (mdev->state.conn) {
|
|
case C_STARTING_SYNC_T:
|
|
_drbd_request_state(mdev, NS(conn, C_WF_SYNC_UUID), CS_VERBOSE);
|
|
break;
|
|
case C_STARTING_SYNC_S:
|
|
drbd_start_resync(mdev, C_SYNC_SOURCE);
|
|
break;
|
|
}
|
|
}
|
|
|
|
int drbd_bitmap_io_from_worker(struct drbd_conf *mdev,
|
|
int (*io_fn)(struct drbd_conf *),
|
|
char *why, enum bm_flag flags)
|
|
{
|
|
int rv;
|
|
|
|
D_ASSERT(current == mdev->tconn->worker.task);
|
|
|
|
/* open coded non-blocking drbd_suspend_io(mdev); */
|
|
set_bit(SUSPEND_IO, &mdev->flags);
|
|
|
|
drbd_bm_lock(mdev, why, flags);
|
|
rv = io_fn(mdev);
|
|
drbd_bm_unlock(mdev);
|
|
|
|
drbd_resume_io(mdev);
|
|
|
|
return rv;
|
|
}
|
|
|
|
/**
|
|
* after_state_ch() - Perform after state change actions that may sleep
|
|
* @mdev: DRBD device.
|
|
* @os: old state.
|
|
* @ns: new state.
|
|
* @flags: Flags
|
|
*/
|
|
static void after_state_ch(struct drbd_conf *mdev, union drbd_state os,
|
|
union drbd_state ns, enum chg_state_flags flags)
|
|
{
|
|
enum drbd_fencing_p fp;
|
|
struct sib_info sib;
|
|
|
|
sib.sib_reason = SIB_STATE_CHANGE;
|
|
sib.os = os;
|
|
sib.ns = ns;
|
|
|
|
if (os.conn != C_CONNECTED && ns.conn == C_CONNECTED) {
|
|
clear_bit(CRASHED_PRIMARY, &mdev->flags);
|
|
if (mdev->p_uuid)
|
|
mdev->p_uuid[UI_FLAGS] &= ~((u64)2);
|
|
}
|
|
|
|
fp = FP_DONT_CARE;
|
|
if (get_ldev(mdev)) {
|
|
rcu_read_lock();
|
|
fp = rcu_dereference(mdev->ldev->disk_conf)->fencing;
|
|
rcu_read_unlock();
|
|
put_ldev(mdev);
|
|
}
|
|
|
|
/* Inform userspace about the change... */
|
|
drbd_bcast_event(mdev, &sib);
|
|
|
|
if (!(os.role == R_PRIMARY && os.disk < D_UP_TO_DATE && os.pdsk < D_UP_TO_DATE) &&
|
|
(ns.role == R_PRIMARY && ns.disk < D_UP_TO_DATE && ns.pdsk < D_UP_TO_DATE))
|
|
drbd_khelper(mdev, "pri-on-incon-degr");
|
|
|
|
/* Here we have the actions that are performed after a
|
|
state change. This function might sleep */
|
|
|
|
if (ns.susp_nod) {
|
|
enum drbd_req_event what = NOTHING;
|
|
|
|
if (os.conn < C_CONNECTED && conn_lowest_conn(mdev->tconn) >= C_CONNECTED)
|
|
what = RESEND;
|
|
|
|
if (os.disk == D_ATTACHING && conn_lowest_disk(mdev->tconn) > D_ATTACHING)
|
|
what = RESTART_FROZEN_DISK_IO;
|
|
|
|
if (what != NOTHING) {
|
|
spin_lock_irq(&mdev->tconn->req_lock);
|
|
_tl_restart(mdev->tconn, what);
|
|
_drbd_set_state(_NS(mdev, susp_nod, 0), CS_VERBOSE, NULL);
|
|
spin_unlock_irq(&mdev->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,
|
|
* which is unexpected. */
|
|
if ((os.conn != C_SYNC_SOURCE && os.conn != C_PAUSED_SYNC_S) &&
|
|
(ns.conn == C_SYNC_SOURCE || ns.conn == C_PAUSED_SYNC_S) &&
|
|
mdev->tconn->agreed_pro_version >= 96 && get_ldev(mdev)) {
|
|
drbd_gen_and_send_sync_uuid(mdev);
|
|
put_ldev(mdev);
|
|
}
|
|
|
|
/* Do not change the order of the if above and the two below... */
|
|
if (os.pdsk == D_DISKLESS && ns.pdsk > D_DISKLESS) { /* attach on the peer */
|
|
drbd_send_uuids(mdev);
|
|
drbd_send_state(mdev);
|
|
}
|
|
/* No point in queuing send_bitmap if we don't have a connection
|
|
* anymore, so check also the _current_ state, not only the new state
|
|
* at the time this work was queued. */
|
|
if (os.conn != C_WF_BITMAP_S && ns.conn == C_WF_BITMAP_S &&
|
|
mdev->state.conn == C_WF_BITMAP_S)
|
|
drbd_queue_bitmap_io(mdev, &drbd_send_bitmap, NULL,
|
|
"send_bitmap (WFBitMapS)",
|
|
BM_LOCKED_TEST_ALLOWED);
|
|
|
|
/* Lost contact to peer's copy of the data */
|
|
if ((os.pdsk >= D_INCONSISTENT &&
|
|
os.pdsk != D_UNKNOWN &&
|
|
os.pdsk != D_OUTDATED)
|
|
&& (ns.pdsk < D_INCONSISTENT ||
|
|
ns.pdsk == D_UNKNOWN ||
|
|
ns.pdsk == D_OUTDATED)) {
|
|
if (get_ldev(mdev)) {
|
|
if ((ns.role == R_PRIMARY || ns.peer == R_PRIMARY) &&
|
|
mdev->ldev->md.uuid[UI_BITMAP] == 0 && ns.disk >= D_UP_TO_DATE) {
|
|
if (drbd_suspended(mdev)) {
|
|
set_bit(NEW_CUR_UUID, &mdev->flags);
|
|
} else {
|
|
drbd_uuid_new_current(mdev);
|
|
drbd_send_uuids(mdev);
|
|
}
|
|
}
|
|
put_ldev(mdev);
|
|
}
|
|
}
|
|
|
|
if (ns.pdsk < D_INCONSISTENT && get_ldev(mdev)) {
|
|
if (ns.peer == R_PRIMARY && mdev->ldev->md.uuid[UI_BITMAP] == 0) {
|
|
drbd_uuid_new_current(mdev);
|
|
drbd_send_uuids(mdev);
|
|
}
|
|
|
|
/* D_DISKLESS Peer becomes secondary */
|
|
if (os.peer == R_PRIMARY && ns.peer == R_SECONDARY)
|
|
/* We may still be Primary ourselves.
|
|
* No harm done if the bitmap still changes,
|
|
* redirtied pages will follow later. */
|
|
drbd_bitmap_io_from_worker(mdev, &drbd_bm_write,
|
|
"demote diskless peer", BM_LOCKED_SET_ALLOWED);
|
|
put_ldev(mdev);
|
|
}
|
|
|
|
/* Write out all changed bits on demote.
|
|
* Though, no need to da that just yet
|
|
* if there is a resync going on still */
|
|
if (os.role == R_PRIMARY && ns.role == R_SECONDARY &&
|
|
mdev->state.conn <= C_CONNECTED && get_ldev(mdev)) {
|
|
/* No changes to the bitmap expected this time, so assert that,
|
|
* even though no harm was done if it did change. */
|
|
drbd_bitmap_io_from_worker(mdev, &drbd_bm_write,
|
|
"demote", BM_LOCKED_TEST_ALLOWED);
|
|
put_ldev(mdev);
|
|
}
|
|
|
|
/* Last part of the attaching process ... */
|
|
if (ns.conn >= C_CONNECTED &&
|
|
os.disk == D_ATTACHING && ns.disk == D_NEGOTIATING) {
|
|
drbd_send_sizes(mdev, 0, 0); /* to start sync... */
|
|
drbd_send_uuids(mdev);
|
|
drbd_send_state(mdev);
|
|
}
|
|
|
|
/* We want to pause/continue resync, tell peer. */
|
|
if (ns.conn >= C_CONNECTED &&
|
|
((os.aftr_isp != ns.aftr_isp) ||
|
|
(os.user_isp != ns.user_isp)))
|
|
drbd_send_state(mdev);
|
|
|
|
/* In case one of the isp bits got set, suspend other devices. */
|
|
if ((!os.aftr_isp && !os.peer_isp && !os.user_isp) &&
|
|
(ns.aftr_isp || ns.peer_isp || ns.user_isp))
|
|
suspend_other_sg(mdev);
|
|
|
|
/* Make sure the peer gets informed about eventual state
|
|
changes (ISP bits) while we were in WFReportParams. */
|
|
if (os.conn == C_WF_REPORT_PARAMS && ns.conn >= C_CONNECTED)
|
|
drbd_send_state(mdev);
|
|
|
|
if (os.conn != C_AHEAD && ns.conn == C_AHEAD)
|
|
drbd_send_state(mdev);
|
|
|
|
/* We are in the progress to start a full sync... */
|
|
if ((os.conn != C_STARTING_SYNC_T && ns.conn == C_STARTING_SYNC_T) ||
|
|
(os.conn != C_STARTING_SYNC_S && ns.conn == C_STARTING_SYNC_S))
|
|
/* no other bitmap changes expected during this phase */
|
|
drbd_queue_bitmap_io(mdev,
|
|
&drbd_bmio_set_n_write, &abw_start_sync,
|
|
"set_n_write from StartingSync", BM_LOCKED_TEST_ALLOWED);
|
|
|
|
/* We are invalidating our self... */
|
|
if (os.conn < C_CONNECTED && ns.conn < C_CONNECTED &&
|
|
os.disk > D_INCONSISTENT && ns.disk == D_INCONSISTENT)
|
|
/* other bitmap operation expected during this phase */
|
|
drbd_queue_bitmap_io(mdev, &drbd_bmio_set_n_write, NULL,
|
|
"set_n_write from invalidate", BM_LOCKED_MASK);
|
|
|
|
/* first half of local IO error, failure to attach,
|
|
* or administrative detach */
|
|
if (os.disk != D_FAILED && ns.disk == D_FAILED) {
|
|
enum drbd_io_error_p eh;
|
|
int was_io_error;
|
|
/* corresponding get_ldev was in __drbd_set_state, to serialize
|
|
* our cleanup here with the transition to D_DISKLESS,
|
|
* so it is safe to dreference ldev here. */
|
|
rcu_read_lock();
|
|
eh = rcu_dereference(mdev->ldev->disk_conf)->on_io_error;
|
|
rcu_read_unlock();
|
|
was_io_error = test_and_clear_bit(WAS_IO_ERROR, &mdev->flags);
|
|
|
|
/* current state still has to be D_FAILED,
|
|
* there is only one way out: to D_DISKLESS,
|
|
* and that may only happen after our put_ldev below. */
|
|
if (mdev->state.disk != D_FAILED)
|
|
dev_err(DEV,
|
|
"ASSERT FAILED: disk is %s during detach\n",
|
|
drbd_disk_str(mdev->state.disk));
|
|
|
|
if (!drbd_send_state(mdev))
|
|
dev_warn(DEV, "Notified peer that I am detaching my disk\n");
|
|
else
|
|
dev_err(DEV, "Sending state for detaching disk failed\n");
|
|
|
|
drbd_rs_cancel_all(mdev);
|
|
|
|
/* In case we want to get something to stable storage still,
|
|
* this may be the last chance.
|
|
* Following put_ldev may transition to D_DISKLESS. */
|
|
drbd_md_sync(mdev);
|
|
put_ldev(mdev);
|
|
|
|
if (was_io_error && eh == EP_CALL_HELPER)
|
|
drbd_khelper(mdev, "local-io-error");
|
|
}
|
|
|
|
/* second half of local IO error, failure to attach,
|
|
* or administrative detach,
|
|
* after local_cnt references have reached zero again */
|
|
if (os.disk != D_DISKLESS && ns.disk == D_DISKLESS) {
|
|
/* We must still be diskless,
|
|
* re-attach has to be serialized with this! */
|
|
if (mdev->state.disk != D_DISKLESS)
|
|
dev_err(DEV,
|
|
"ASSERT FAILED: disk is %s while going diskless\n",
|
|
drbd_disk_str(mdev->state.disk));
|
|
|
|
mdev->rs_total = 0;
|
|
mdev->rs_failed = 0;
|
|
atomic_set(&mdev->rs_pending_cnt, 0);
|
|
|
|
if (!drbd_send_state(mdev))
|
|
dev_warn(DEV, "Notified peer that I'm now diskless.\n");
|
|
/* corresponding get_ldev in __drbd_set_state
|
|
* this may finally trigger drbd_ldev_destroy. */
|
|
put_ldev(mdev);
|
|
}
|
|
|
|
/* Notify peer that I had a local IO error, and did not detached.. */
|
|
if (os.disk == D_UP_TO_DATE && ns.disk == D_INCONSISTENT)
|
|
drbd_send_state(mdev);
|
|
|
|
/* Disks got bigger while they were detached */
|
|
if (ns.disk > D_NEGOTIATING && ns.pdsk > D_NEGOTIATING &&
|
|
test_and_clear_bit(RESYNC_AFTER_NEG, &mdev->flags)) {
|
|
if (ns.conn == C_CONNECTED)
|
|
resync_after_online_grow(mdev);
|
|
}
|
|
|
|
/* A resync finished or aborted, wake paused devices... */
|
|
if ((os.conn > C_CONNECTED && ns.conn <= C_CONNECTED) ||
|
|
(os.peer_isp && !ns.peer_isp) ||
|
|
(os.user_isp && !ns.user_isp))
|
|
resume_next_sg(mdev);
|
|
|
|
/* sync target done with resync. Explicitly notify peer, even though
|
|
* it should (at least for non-empty resyncs) already know itself. */
|
|
if (os.disk < D_UP_TO_DATE && os.conn >= C_SYNC_SOURCE && ns.conn == C_CONNECTED)
|
|
drbd_send_state(mdev);
|
|
|
|
/* This triggers bitmap writeout of potentially still unwritten pages
|
|
* if the resync finished cleanly, or aborted because of peer disk
|
|
* failure, or because of connection loss.
|
|
* For resync aborted because of local disk failure, we cannot do
|
|
* any bitmap writeout anymore.
|
|
* No harm done if some bits change during this phase.
|
|
*/
|
|
if (os.conn > C_CONNECTED && ns.conn <= C_CONNECTED && get_ldev(mdev)) {
|
|
drbd_queue_bitmap_io(mdev, &drbd_bm_write, NULL,
|
|
"write from resync_finished", BM_LOCKED_SET_ALLOWED);
|
|
put_ldev(mdev);
|
|
}
|
|
|
|
if (ns.disk == D_DISKLESS &&
|
|
ns.conn == C_STANDALONE &&
|
|
ns.role == R_SECONDARY) {
|
|
if (os.aftr_isp != ns.aftr_isp)
|
|
resume_next_sg(mdev);
|
|
}
|
|
|
|
drbd_md_sync(mdev);
|
|
}
|
|
|
|
struct after_conn_state_chg_work {
|
|
struct drbd_work w;
|
|
enum drbd_conns oc;
|
|
union drbd_state ns_min;
|
|
union drbd_state ns_max; /* new, max state, over all mdevs */
|
|
enum chg_state_flags flags;
|
|
};
|
|
|
|
static int w_after_conn_state_ch(struct drbd_work *w, int unused)
|
|
{
|
|
struct after_conn_state_chg_work *acscw =
|
|
container_of(w, struct after_conn_state_chg_work, w);
|
|
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;
|
|
|
|
kfree(acscw);
|
|
|
|
/* Upon network configuration, we need to start the receiver */
|
|
if (oc == C_STANDALONE && ns_max.conn == C_UNCONNECTED)
|
|
drbd_thread_start(&tconn->receiver);
|
|
|
|
if (oc == C_DISCONNECTING && ns_max.conn == C_STANDALONE) {
|
|
struct net_conf *old_conf;
|
|
|
|
mutex_lock(&tconn->conf_update);
|
|
old_conf = tconn->net_conf;
|
|
rcu_assign_pointer(tconn->net_conf, NULL);
|
|
conn_free_crypto(tconn);
|
|
mutex_unlock(&tconn->conf_update);
|
|
|
|
synchronize_rcu();
|
|
kfree(old_conf);
|
|
}
|
|
|
|
if (ns_max.susp_fen) {
|
|
/* case1: The outdate peer handler is successful: */
|
|
if (ns_max.pdsk <= D_OUTDATED) {
|
|
tl_clear(tconn);
|
|
rcu_read_lock();
|
|
idr_for_each_entry(&tconn->volumes, mdev, vnr) {
|
|
if (test_bit(NEW_CUR_UUID, &mdev->flags)) {
|
|
drbd_uuid_new_current(mdev);
|
|
clear_bit(NEW_CUR_UUID, &mdev->flags);
|
|
}
|
|
}
|
|
rcu_read_unlock();
|
|
conn_request_state(tconn,
|
|
(union drbd_state) { { .susp_fen = 1 } },
|
|
(union drbd_state) { { .susp_fen = 0 } },
|
|
CS_VERBOSE);
|
|
}
|
|
/* 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;
|
|
}
|
|
|
|
void conn_old_common_state(struct drbd_tconn *tconn, union drbd_state *pcs, enum chg_state_flags *pf)
|
|
{
|
|
enum chg_state_flags flags = ~0;
|
|
union drbd_dev_state os, cs = {}; /* old_state, common_state */
|
|
struct drbd_conf *mdev;
|
|
int vnr, first_vol = 1;
|
|
|
|
rcu_read_lock();
|
|
idr_for_each_entry(&tconn->volumes, mdev, vnr) {
|
|
os = mdev->state;
|
|
|
|
if (first_vol) {
|
|
cs = os;
|
|
first_vol = 0;
|
|
continue;
|
|
}
|
|
|
|
if (cs.role != os.role)
|
|
flags &= ~CS_DC_ROLE;
|
|
|
|
if (cs.peer != os.peer)
|
|
flags &= ~CS_DC_PEER;
|
|
|
|
if (cs.conn != os.conn)
|
|
flags &= ~CS_DC_CONN;
|
|
|
|
if (cs.disk != os.disk)
|
|
flags &= ~CS_DC_DISK;
|
|
|
|
if (cs.pdsk != os.pdsk)
|
|
flags &= ~CS_DC_PDSK;
|
|
}
|
|
rcu_read_unlock();
|
|
|
|
*pf |= CS_DC_MASK;
|
|
*pf &= flags;
|
|
(*pcs).i = cs.i;
|
|
}
|
|
|
|
static enum drbd_state_rv
|
|
conn_is_valid_transition(struct drbd_tconn *tconn, union drbd_state mask, union drbd_state val,
|
|
enum chg_state_flags flags)
|
|
{
|
|
enum drbd_state_rv rv = SS_SUCCESS;
|
|
union drbd_state ns, os;
|
|
struct drbd_conf *mdev;
|
|
int vnr;
|
|
|
|
rcu_read_lock();
|
|
idr_for_each_entry(&tconn->volumes, mdev, vnr) {
|
|
os = drbd_read_state(mdev);
|
|
ns = sanitize_state(mdev, apply_mask_val(os, mask, val), NULL);
|
|
|
|
if (flags & CS_IGN_OUTD_FAIL && ns.disk == D_OUTDATED && os.disk < D_OUTDATED)
|
|
ns.disk = os.disk;
|
|
|
|
if (ns.i == os.i)
|
|
continue;
|
|
|
|
rv = is_valid_transition(os, ns);
|
|
if (rv < SS_SUCCESS)
|
|
break;
|
|
|
|
if (!(flags & CS_HARD)) {
|
|
rv = is_valid_state(mdev, ns);
|
|
if (rv < SS_SUCCESS) {
|
|
if (is_valid_state(mdev, os) == rv)
|
|
rv = is_valid_soft_transition(os, ns);
|
|
} else
|
|
rv = is_valid_soft_transition(os, ns);
|
|
}
|
|
if (rv < SS_SUCCESS)
|
|
break;
|
|
}
|
|
rcu_read_unlock();
|
|
|
|
if (rv < SS_SUCCESS && flags & CS_VERBOSE)
|
|
print_st_err(mdev, os, ns, rv);
|
|
|
|
return rv;
|
|
}
|
|
|
|
void
|
|
conn_set_state(struct drbd_tconn *tconn, union drbd_state mask, union drbd_state val,
|
|
union drbd_state *pns_min, union drbd_state *pns_max, enum chg_state_flags flags)
|
|
{
|
|
union drbd_state ns, os, ns_max = { };
|
|
union drbd_state ns_min = {
|
|
{ .role = R_MASK,
|
|
.peer = R_MASK,
|
|
.disk = D_MASK,
|
|
.pdsk = D_MASK
|
|
} };
|
|
struct drbd_conf *mdev;
|
|
enum drbd_state_rv rv;
|
|
int vnr;
|
|
|
|
if (mask.conn == C_MASK)
|
|
tconn->cstate = val.conn;
|
|
|
|
rcu_read_lock();
|
|
idr_for_each_entry(&tconn->volumes, mdev, vnr) {
|
|
os = drbd_read_state(mdev);
|
|
ns = apply_mask_val(os, mask, val);
|
|
ns = sanitize_state(mdev, ns, NULL);
|
|
|
|
if (flags & CS_IGN_OUTD_FAIL && ns.disk == D_OUTDATED && os.disk < D_OUTDATED)
|
|
ns.disk = os.disk;
|
|
|
|
rv = __drbd_set_state(mdev, ns, flags, NULL);
|
|
if (rv < SS_SUCCESS)
|
|
BUG();
|
|
|
|
ns.i = mdev->state.i;
|
|
ns_max.role = max_role(ns.role, ns_max.role);
|
|
ns_max.peer = max_role(ns.peer, ns_max.peer);
|
|
ns_max.conn = max_t(enum drbd_conns, ns.conn, ns_max.conn);
|
|
ns_max.disk = max_t(enum drbd_disk_state, ns.disk, ns_max.disk);
|
|
ns_max.pdsk = max_t(enum drbd_disk_state, ns.pdsk, ns_max.pdsk);
|
|
|
|
ns_min.role = min_role(ns.role, ns_min.role);
|
|
ns_min.peer = min_role(ns.peer, ns_min.peer);
|
|
ns_min.conn = min_t(enum drbd_conns, ns.conn, ns_min.conn);
|
|
ns_min.disk = min_t(enum drbd_disk_state, ns.disk, ns_min.disk);
|
|
ns_min.pdsk = min_t(enum drbd_disk_state, ns.pdsk, ns_min.pdsk);
|
|
}
|
|
rcu_read_unlock();
|
|
|
|
ns_min.susp = ns_max.susp = tconn->susp;
|
|
ns_min.susp_nod = ns_max.susp_nod = tconn->susp_nod;
|
|
ns_min.susp_fen = ns_max.susp_fen = tconn->susp_fen;
|
|
|
|
*pns_min = ns_min;
|
|
*pns_max = ns_max;
|
|
}
|
|
|
|
static enum drbd_state_rv
|
|
_conn_rq_cond(struct drbd_tconn *tconn, union drbd_state mask, union drbd_state val)
|
|
{
|
|
enum drbd_state_rv rv;
|
|
|
|
if (test_and_clear_bit(CONN_WD_ST_CHG_OKAY, &tconn->flags))
|
|
return SS_CW_SUCCESS;
|
|
|
|
if (test_and_clear_bit(CONN_WD_ST_CHG_FAIL, &tconn->flags))
|
|
return SS_CW_FAILED_BY_PEER;
|
|
|
|
spin_lock_irq(&tconn->req_lock);
|
|
rv = tconn->cstate != C_WF_REPORT_PARAMS ? SS_CW_NO_NEED : SS_UNKNOWN_ERROR;
|
|
|
|
if (rv == SS_UNKNOWN_ERROR)
|
|
rv = conn_is_valid_transition(tconn, mask, val, 0);
|
|
|
|
if (rv == SS_SUCCESS)
|
|
rv = SS_UNKNOWN_ERROR; /* cont waiting, otherwise fail. */
|
|
|
|
spin_unlock_irq(&tconn->req_lock);
|
|
|
|
return rv;
|
|
}
|
|
|
|
static enum drbd_state_rv
|
|
conn_cl_wide(struct drbd_tconn *tconn, union drbd_state mask, union drbd_state val,
|
|
enum chg_state_flags f)
|
|
{
|
|
enum drbd_state_rv rv;
|
|
|
|
spin_unlock_irq(&tconn->req_lock);
|
|
mutex_lock(&tconn->cstate_mutex);
|
|
|
|
if (conn_send_state_req(tconn, mask, val)) {
|
|
rv = SS_CW_FAILED_BY_PEER;
|
|
/* if (f & CS_VERBOSE)
|
|
print_st_err(mdev, os, ns, rv); */
|
|
goto abort;
|
|
}
|
|
|
|
wait_event(tconn->ping_wait, (rv = _conn_rq_cond(tconn, mask, val)));
|
|
|
|
abort:
|
|
mutex_unlock(&tconn->cstate_mutex);
|
|
spin_lock_irq(&tconn->req_lock);
|
|
|
|
return rv;
|
|
}
|
|
|
|
enum drbd_state_rv
|
|
_conn_request_state(struct drbd_tconn *tconn, union drbd_state mask, union drbd_state val,
|
|
enum chg_state_flags flags)
|
|
{
|
|
enum drbd_state_rv rv = SS_SUCCESS;
|
|
struct after_conn_state_chg_work *acscw;
|
|
enum drbd_conns oc = tconn->cstate;
|
|
union drbd_state ns_max, ns_min, os;
|
|
|
|
rv = is_valid_conn_transition(oc, val.conn);
|
|
if (rv < SS_SUCCESS)
|
|
goto abort;
|
|
|
|
rv = conn_is_valid_transition(tconn, mask, val, flags);
|
|
if (rv < SS_SUCCESS)
|
|
goto abort;
|
|
|
|
if (oc == C_WF_REPORT_PARAMS && val.conn == C_DISCONNECTING &&
|
|
!(flags & (CS_LOCAL_ONLY | CS_HARD))) {
|
|
rv = conn_cl_wide(tconn, mask, val, flags);
|
|
if (rv < SS_SUCCESS)
|
|
goto abort;
|
|
}
|
|
|
|
conn_old_common_state(tconn, &os, &flags);
|
|
flags |= CS_DC_SUSP;
|
|
conn_set_state(tconn, mask, val, &ns_min, &ns_max, flags);
|
|
conn_pr_state_change(tconn, os, ns_max, flags);
|
|
|
|
acscw = kmalloc(sizeof(*acscw), GFP_ATOMIC);
|
|
if (acscw) {
|
|
acscw->oc = os.conn;
|
|
acscw->ns_min = ns_min;
|
|
acscw->ns_max = ns_max;
|
|
acscw->flags = flags;
|
|
acscw->w.cb = w_after_conn_state_ch;
|
|
kref_get(&tconn->kref);
|
|
acscw->w.tconn = tconn;
|
|
drbd_queue_work(&tconn->data.work, &acscw->w);
|
|
} else {
|
|
conn_err(tconn, "Could not kmalloc an acscw\n");
|
|
}
|
|
|
|
abort:
|
|
return rv;
|
|
}
|
|
|
|
enum drbd_state_rv
|
|
conn_request_state(struct drbd_tconn *tconn, union drbd_state mask, union drbd_state val,
|
|
enum chg_state_flags flags)
|
|
{
|
|
enum drbd_state_rv rv;
|
|
|
|
spin_lock_irq(&tconn->req_lock);
|
|
rv = _conn_request_state(tconn, mask, val, flags);
|
|
spin_unlock_irq(&tconn->req_lock);
|
|
|
|
return rv;
|
|
}
|