mirror of
https://github.com/AuxXxilium/linux_dsm_epyc7002.git
synced 2024-12-17 18:06:42 +07:00
7e5fec3168
This contains various cosmetic fixes ranging from simple typos to const-ifying, and using booleans properly. Original commit messages from Fabian's patch set: drbd: debugfs: constify drbd_version_fops drbd: use seq_put instead of seq_print where possible drbd: include linux/uaccess.h instead of asm/uaccess.h drbd: use const char * const for drbd strings drbd: kerneldoc warning fix in w_e_end_data_req() drbd: use unsigned for one bit fields drbd: use bool for peer is_ states drbd: fix typo drbd: use | for bitmask combination drbd: use true/false for bool drbd: fix drbd_bm_init() comments drbd: introduce peer state union drbd: fix maybe_pull_ahead() locking comments drbd: use bool for growing drbd: remove redundant declarations drbd: replace if/BUG by BUG_ON Signed-off-by: Fabian Frederick <fabf@skynet.be> Signed-off-by: Roland Kammerer <roland.kammerer@linbit.com> Signed-off-by: Jens Axboe <axboe@fb.com>
2357 lines
72 KiB
C
2357 lines
72 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_protocol.h"
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#include "drbd_req.h"
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#include "drbd_state_change.h"
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struct after_state_chg_work {
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struct drbd_work w;
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struct drbd_device *device;
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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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struct drbd_state_change *state_change;
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};
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enum sanitize_state_warnings {
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NO_WARNING,
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ABORTED_ONLINE_VERIFY,
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ABORTED_RESYNC,
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CONNECTION_LOST_NEGOTIATING,
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IMPLICITLY_UPGRADED_DISK,
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IMPLICITLY_UPGRADED_PDSK,
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};
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static void count_objects(struct drbd_resource *resource,
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unsigned int *n_devices,
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unsigned int *n_connections)
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{
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struct drbd_device *device;
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struct drbd_connection *connection;
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int vnr;
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*n_devices = 0;
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*n_connections = 0;
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idr_for_each_entry(&resource->devices, device, vnr)
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(*n_devices)++;
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for_each_connection(connection, resource)
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(*n_connections)++;
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}
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static struct drbd_state_change *alloc_state_change(unsigned int n_devices, unsigned int n_connections, gfp_t gfp)
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{
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struct drbd_state_change *state_change;
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unsigned int size, n;
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size = sizeof(struct drbd_state_change) +
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n_devices * sizeof(struct drbd_device_state_change) +
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n_connections * sizeof(struct drbd_connection_state_change) +
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n_devices * n_connections * sizeof(struct drbd_peer_device_state_change);
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state_change = kmalloc(size, gfp);
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if (!state_change)
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return NULL;
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state_change->n_devices = n_devices;
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state_change->n_connections = n_connections;
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state_change->devices = (void *)(state_change + 1);
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state_change->connections = (void *)&state_change->devices[n_devices];
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state_change->peer_devices = (void *)&state_change->connections[n_connections];
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state_change->resource->resource = NULL;
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for (n = 0; n < n_devices; n++)
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state_change->devices[n].device = NULL;
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for (n = 0; n < n_connections; n++)
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state_change->connections[n].connection = NULL;
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return state_change;
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}
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struct drbd_state_change *remember_old_state(struct drbd_resource *resource, gfp_t gfp)
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{
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struct drbd_state_change *state_change;
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struct drbd_device *device;
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unsigned int n_devices;
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struct drbd_connection *connection;
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unsigned int n_connections;
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int vnr;
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struct drbd_device_state_change *device_state_change;
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struct drbd_peer_device_state_change *peer_device_state_change;
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struct drbd_connection_state_change *connection_state_change;
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/* Caller holds req_lock spinlock.
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* No state, no device IDR, no connections lists can change. */
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count_objects(resource, &n_devices, &n_connections);
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state_change = alloc_state_change(n_devices, n_connections, gfp);
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if (!state_change)
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return NULL;
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kref_get(&resource->kref);
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state_change->resource->resource = resource;
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state_change->resource->role[OLD] =
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conn_highest_role(first_connection(resource));
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state_change->resource->susp[OLD] = resource->susp;
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state_change->resource->susp_nod[OLD] = resource->susp_nod;
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state_change->resource->susp_fen[OLD] = resource->susp_fen;
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connection_state_change = state_change->connections;
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for_each_connection(connection, resource) {
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kref_get(&connection->kref);
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connection_state_change->connection = connection;
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connection_state_change->cstate[OLD] =
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connection->cstate;
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connection_state_change->peer_role[OLD] =
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conn_highest_peer(connection);
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connection_state_change++;
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}
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device_state_change = state_change->devices;
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peer_device_state_change = state_change->peer_devices;
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idr_for_each_entry(&resource->devices, device, vnr) {
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kref_get(&device->kref);
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device_state_change->device = device;
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device_state_change->disk_state[OLD] = device->state.disk;
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/* The peer_devices for each device have to be enumerated in
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the order of the connections. We may not use for_each_peer_device() here. */
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for_each_connection(connection, resource) {
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struct drbd_peer_device *peer_device;
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peer_device = conn_peer_device(connection, device->vnr);
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peer_device_state_change->peer_device = peer_device;
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peer_device_state_change->disk_state[OLD] =
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device->state.pdsk;
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peer_device_state_change->repl_state[OLD] =
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max_t(enum drbd_conns,
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C_WF_REPORT_PARAMS, device->state.conn);
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peer_device_state_change->resync_susp_user[OLD] =
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device->state.user_isp;
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peer_device_state_change->resync_susp_peer[OLD] =
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device->state.peer_isp;
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peer_device_state_change->resync_susp_dependency[OLD] =
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device->state.aftr_isp;
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peer_device_state_change++;
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}
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device_state_change++;
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}
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return state_change;
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}
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static void remember_new_state(struct drbd_state_change *state_change)
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{
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struct drbd_resource_state_change *resource_state_change;
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struct drbd_resource *resource;
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unsigned int n;
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if (!state_change)
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return;
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resource_state_change = &state_change->resource[0];
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resource = resource_state_change->resource;
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resource_state_change->role[NEW] =
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conn_highest_role(first_connection(resource));
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resource_state_change->susp[NEW] = resource->susp;
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resource_state_change->susp_nod[NEW] = resource->susp_nod;
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resource_state_change->susp_fen[NEW] = resource->susp_fen;
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for (n = 0; n < state_change->n_devices; n++) {
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struct drbd_device_state_change *device_state_change =
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&state_change->devices[n];
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struct drbd_device *device = device_state_change->device;
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device_state_change->disk_state[NEW] = device->state.disk;
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}
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for (n = 0; n < state_change->n_connections; n++) {
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struct drbd_connection_state_change *connection_state_change =
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&state_change->connections[n];
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struct drbd_connection *connection =
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connection_state_change->connection;
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connection_state_change->cstate[NEW] = connection->cstate;
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connection_state_change->peer_role[NEW] =
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conn_highest_peer(connection);
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}
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for (n = 0; n < state_change->n_devices * state_change->n_connections; n++) {
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struct drbd_peer_device_state_change *peer_device_state_change =
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&state_change->peer_devices[n];
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struct drbd_device *device =
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peer_device_state_change->peer_device->device;
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union drbd_dev_state state = device->state;
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peer_device_state_change->disk_state[NEW] = state.pdsk;
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peer_device_state_change->repl_state[NEW] =
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max_t(enum drbd_conns, C_WF_REPORT_PARAMS, state.conn);
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peer_device_state_change->resync_susp_user[NEW] =
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state.user_isp;
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peer_device_state_change->resync_susp_peer[NEW] =
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state.peer_isp;
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peer_device_state_change->resync_susp_dependency[NEW] =
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state.aftr_isp;
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}
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}
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void copy_old_to_new_state_change(struct drbd_state_change *state_change)
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{
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struct drbd_resource_state_change *resource_state_change = &state_change->resource[0];
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unsigned int n_device, n_connection, n_peer_device, n_peer_devices;
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#define OLD_TO_NEW(x) \
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(x[NEW] = x[OLD])
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OLD_TO_NEW(resource_state_change->role);
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OLD_TO_NEW(resource_state_change->susp);
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OLD_TO_NEW(resource_state_change->susp_nod);
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OLD_TO_NEW(resource_state_change->susp_fen);
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for (n_connection = 0; n_connection < state_change->n_connections; n_connection++) {
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struct drbd_connection_state_change *connection_state_change =
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&state_change->connections[n_connection];
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OLD_TO_NEW(connection_state_change->peer_role);
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OLD_TO_NEW(connection_state_change->cstate);
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}
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for (n_device = 0; n_device < state_change->n_devices; n_device++) {
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struct drbd_device_state_change *device_state_change =
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&state_change->devices[n_device];
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OLD_TO_NEW(device_state_change->disk_state);
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}
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n_peer_devices = state_change->n_devices * state_change->n_connections;
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for (n_peer_device = 0; n_peer_device < n_peer_devices; n_peer_device++) {
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struct drbd_peer_device_state_change *p =
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&state_change->peer_devices[n_peer_device];
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OLD_TO_NEW(p->disk_state);
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OLD_TO_NEW(p->repl_state);
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OLD_TO_NEW(p->resync_susp_user);
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OLD_TO_NEW(p->resync_susp_peer);
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OLD_TO_NEW(p->resync_susp_dependency);
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}
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#undef OLD_TO_NEW
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}
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void forget_state_change(struct drbd_state_change *state_change)
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{
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unsigned int n;
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if (!state_change)
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return;
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if (state_change->resource->resource)
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kref_put(&state_change->resource->resource->kref, drbd_destroy_resource);
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for (n = 0; n < state_change->n_devices; n++) {
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struct drbd_device *device = state_change->devices[n].device;
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if (device)
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kref_put(&device->kref, drbd_destroy_device);
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}
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for (n = 0; n < state_change->n_connections; n++) {
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struct drbd_connection *connection =
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state_change->connections[n].connection;
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if (connection)
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kref_put(&connection->kref, drbd_destroy_connection);
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}
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kfree(state_change);
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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_device *device, union drbd_state os,
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union drbd_state ns, enum chg_state_flags flags,
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struct drbd_state_change *);
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static enum drbd_state_rv is_valid_state(struct drbd_device *, union drbd_state);
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static enum drbd_state_rv is_valid_soft_transition(union drbd_state, union drbd_state, struct drbd_connection *);
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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_device *device, union drbd_state os,
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union drbd_state ns, enum sanitize_state_warnings *warn);
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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_connection *connection)
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{
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struct drbd_peer_device *peer_device;
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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(&connection->peer_devices, peer_device, vnr) {
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struct drbd_device *device = peer_device->device;
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if (device->state.disk != D_DISKLESS ||
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device->state.conn != C_STANDALONE ||
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device->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_connection *connection)
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{
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enum drbd_role role = R_UNKNOWN;
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struct drbd_peer_device *peer_device;
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int vnr;
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rcu_read_lock();
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idr_for_each_entry(&connection->peer_devices, peer_device, vnr) {
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struct drbd_device *device = peer_device->device;
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role = max_role(role, device->state.role);
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}
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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_connection *connection)
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{
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enum drbd_role peer = R_UNKNOWN;
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struct drbd_peer_device *peer_device;
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int vnr;
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rcu_read_lock();
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idr_for_each_entry(&connection->peer_devices, peer_device, vnr) {
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struct drbd_device *device = peer_device->device;
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peer = max_role(peer, device->state.peer);
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}
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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_connection *connection)
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{
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enum drbd_disk_state disk_state = D_DISKLESS;
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struct drbd_peer_device *peer_device;
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int vnr;
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rcu_read_lock();
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idr_for_each_entry(&connection->peer_devices, peer_device, vnr) {
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struct drbd_device *device = peer_device->device;
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disk_state = max_t(enum drbd_disk_state, disk_state, device->state.disk);
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}
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rcu_read_unlock();
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return disk_state;
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}
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enum drbd_disk_state conn_lowest_disk(struct drbd_connection *connection)
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{
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enum drbd_disk_state disk_state = D_MASK;
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struct drbd_peer_device *peer_device;
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int vnr;
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rcu_read_lock();
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idr_for_each_entry(&connection->peer_devices, peer_device, vnr) {
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struct drbd_device *device = peer_device->device;
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disk_state = min_t(enum drbd_disk_state, disk_state, device->state.disk);
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}
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rcu_read_unlock();
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return disk_state;
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}
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enum drbd_disk_state conn_highest_pdsk(struct drbd_connection *connection)
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{
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enum drbd_disk_state disk_state = D_DISKLESS;
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struct drbd_peer_device *peer_device;
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int vnr;
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rcu_read_lock();
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idr_for_each_entry(&connection->peer_devices, peer_device, vnr) {
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struct drbd_device *device = peer_device->device;
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disk_state = max_t(enum drbd_disk_state, disk_state, device->state.pdsk);
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}
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rcu_read_unlock();
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return disk_state;
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}
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enum drbd_conns conn_lowest_conn(struct drbd_connection *connection)
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{
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enum drbd_conns conn = C_MASK;
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struct drbd_peer_device *peer_device;
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int vnr;
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rcu_read_lock();
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idr_for_each_entry(&connection->peer_devices, peer_device, vnr) {
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struct drbd_device *device = peer_device->device;
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conn = min_t(enum drbd_conns, conn, device->state.conn);
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}
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rcu_read_unlock();
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return conn;
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}
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static bool no_peer_wf_report_params(struct drbd_connection *connection)
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{
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struct drbd_peer_device *peer_device;
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int vnr;
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bool rv = true;
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rcu_read_lock();
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idr_for_each_entry(&connection->peer_devices, peer_device, vnr)
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if (peer_device->device->state.conn == C_WF_REPORT_PARAMS) {
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rv = false;
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break;
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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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static void wake_up_all_devices(struct drbd_connection *connection)
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{
|
|
struct drbd_peer_device *peer_device;
|
|
int vnr;
|
|
|
|
rcu_read_lock();
|
|
idr_for_each_entry(&connection->peer_devices, peer_device, vnr)
|
|
wake_up(&peer_device->device->state_wait);
|
|
rcu_read_unlock();
|
|
|
|
}
|
|
|
|
|
|
/**
|
|
* cl_wide_st_chg() - true if the state change is a cluster wide one
|
|
* @device: DRBD device.
|
|
* @os: old (current) state.
|
|
* @ns: new (wanted) state.
|
|
*/
|
|
static int cl_wide_st_chg(struct drbd_device *device,
|
|
union drbd_state os, union drbd_state ns)
|
|
{
|
|
return (os.conn >= C_CONNECTED && ns.conn >= C_CONNECTED &&
|
|
((os.role != R_PRIMARY && ns.role == R_PRIMARY) ||
|
|
(os.conn != C_STARTING_SYNC_T && ns.conn == C_STARTING_SYNC_T) ||
|
|
(os.conn != C_STARTING_SYNC_S && ns.conn == C_STARTING_SYNC_S) ||
|
|
(os.disk != D_FAILED && ns.disk == D_FAILED))) ||
|
|
(os.conn >= C_CONNECTED && ns.conn == C_DISCONNECTING) ||
|
|
(os.conn == C_CONNECTED && ns.conn == C_VERIFY_S) ||
|
|
(os.conn == C_CONNECTED && ns.conn == C_WF_REPORT_PARAMS);
|
|
}
|
|
|
|
static union drbd_state
|
|
apply_mask_val(union drbd_state os, union drbd_state mask, union drbd_state val)
|
|
{
|
|
union drbd_state ns;
|
|
ns.i = (os.i & ~mask.i) | val.i;
|
|
return ns;
|
|
}
|
|
|
|
enum drbd_state_rv
|
|
drbd_change_state(struct drbd_device *device, enum chg_state_flags f,
|
|
union drbd_state mask, union drbd_state val)
|
|
{
|
|
unsigned long flags;
|
|
union drbd_state ns;
|
|
enum drbd_state_rv rv;
|
|
|
|
spin_lock_irqsave(&device->resource->req_lock, flags);
|
|
ns = apply_mask_val(drbd_read_state(device), mask, val);
|
|
rv = _drbd_set_state(device, ns, f, NULL);
|
|
spin_unlock_irqrestore(&device->resource->req_lock, flags);
|
|
|
|
return rv;
|
|
}
|
|
|
|
/**
|
|
* drbd_force_state() - Impose a change which happens outside our control on our state
|
|
* @device: DRBD device.
|
|
* @mask: mask of state bits to change.
|
|
* @val: value of new state bits.
|
|
*/
|
|
void drbd_force_state(struct drbd_device *device,
|
|
union drbd_state mask, union drbd_state val)
|
|
{
|
|
drbd_change_state(device, CS_HARD, mask, val);
|
|
}
|
|
|
|
static enum drbd_state_rv
|
|
_req_st_cond(struct drbd_device *device, union drbd_state mask,
|
|
union drbd_state val)
|
|
{
|
|
union drbd_state os, ns;
|
|
unsigned long flags;
|
|
enum drbd_state_rv rv;
|
|
|
|
if (test_and_clear_bit(CL_ST_CHG_SUCCESS, &device->flags))
|
|
return SS_CW_SUCCESS;
|
|
|
|
if (test_and_clear_bit(CL_ST_CHG_FAIL, &device->flags))
|
|
return SS_CW_FAILED_BY_PEER;
|
|
|
|
spin_lock_irqsave(&device->resource->req_lock, flags);
|
|
os = drbd_read_state(device);
|
|
ns = sanitize_state(device, os, apply_mask_val(os, mask, val), NULL);
|
|
rv = is_valid_transition(os, ns);
|
|
if (rv >= SS_SUCCESS)
|
|
rv = SS_UNKNOWN_ERROR; /* cont waiting, otherwise fail. */
|
|
|
|
if (!cl_wide_st_chg(device, os, ns))
|
|
rv = SS_CW_NO_NEED;
|
|
if (rv == SS_UNKNOWN_ERROR) {
|
|
rv = is_valid_state(device, ns);
|
|
if (rv >= SS_SUCCESS) {
|
|
rv = is_valid_soft_transition(os, ns, first_peer_device(device)->connection);
|
|
if (rv >= SS_SUCCESS)
|
|
rv = SS_UNKNOWN_ERROR; /* cont waiting, otherwise fail. */
|
|
}
|
|
}
|
|
spin_unlock_irqrestore(&device->resource->req_lock, flags);
|
|
|
|
return rv;
|
|
}
|
|
|
|
/**
|
|
* drbd_req_state() - Perform an eventually cluster wide state change
|
|
* @device: DRBD device.
|
|
* @mask: mask of state bits to change.
|
|
* @val: value of new state bits.
|
|
* @f: flags
|
|
*
|
|
* Should not be called directly, use drbd_request_state() or
|
|
* _drbd_request_state().
|
|
*/
|
|
static enum drbd_state_rv
|
|
drbd_req_state(struct drbd_device *device, union drbd_state mask,
|
|
union drbd_state val, enum chg_state_flags f)
|
|
{
|
|
struct completion done;
|
|
unsigned long flags;
|
|
union drbd_state os, ns;
|
|
enum drbd_state_rv rv;
|
|
|
|
init_completion(&done);
|
|
|
|
if (f & CS_SERIALIZE)
|
|
mutex_lock(device->state_mutex);
|
|
|
|
spin_lock_irqsave(&device->resource->req_lock, flags);
|
|
os = drbd_read_state(device);
|
|
ns = sanitize_state(device, os, apply_mask_val(os, mask, val), NULL);
|
|
rv = is_valid_transition(os, ns);
|
|
if (rv < SS_SUCCESS) {
|
|
spin_unlock_irqrestore(&device->resource->req_lock, flags);
|
|
goto abort;
|
|
}
|
|
|
|
if (cl_wide_st_chg(device, os, ns)) {
|
|
rv = is_valid_state(device, ns);
|
|
if (rv == SS_SUCCESS)
|
|
rv = is_valid_soft_transition(os, ns, first_peer_device(device)->connection);
|
|
spin_unlock_irqrestore(&device->resource->req_lock, flags);
|
|
|
|
if (rv < SS_SUCCESS) {
|
|
if (f & CS_VERBOSE)
|
|
print_st_err(device, os, ns, rv);
|
|
goto abort;
|
|
}
|
|
|
|
if (drbd_send_state_req(first_peer_device(device), mask, val)) {
|
|
rv = SS_CW_FAILED_BY_PEER;
|
|
if (f & CS_VERBOSE)
|
|
print_st_err(device, os, ns, rv);
|
|
goto abort;
|
|
}
|
|
|
|
wait_event(device->state_wait,
|
|
(rv = _req_st_cond(device, mask, val)));
|
|
|
|
if (rv < SS_SUCCESS) {
|
|
if (f & CS_VERBOSE)
|
|
print_st_err(device, os, ns, rv);
|
|
goto abort;
|
|
}
|
|
spin_lock_irqsave(&device->resource->req_lock, flags);
|
|
ns = apply_mask_val(drbd_read_state(device), mask, val);
|
|
rv = _drbd_set_state(device, ns, f, &done);
|
|
} else {
|
|
rv = _drbd_set_state(device, ns, f, &done);
|
|
}
|
|
|
|
spin_unlock_irqrestore(&device->resource->req_lock, flags);
|
|
|
|
if (f & CS_WAIT_COMPLETE && rv == SS_SUCCESS) {
|
|
D_ASSERT(device, current != first_peer_device(device)->connection->worker.task);
|
|
wait_for_completion(&done);
|
|
}
|
|
|
|
abort:
|
|
if (f & CS_SERIALIZE)
|
|
mutex_unlock(device->state_mutex);
|
|
|
|
return rv;
|
|
}
|
|
|
|
/**
|
|
* _drbd_request_state() - Request a state change (with flags)
|
|
* @device: DRBD device.
|
|
* @mask: mask of state bits to change.
|
|
* @val: value of new state bits.
|
|
* @f: flags
|
|
*
|
|
* Cousin of drbd_request_state(), useful with the CS_WAIT_COMPLETE
|
|
* flag, or when logging of failed state change requests is not desired.
|
|
*/
|
|
enum drbd_state_rv
|
|
_drbd_request_state(struct drbd_device *device, union drbd_state mask,
|
|
union drbd_state val, enum chg_state_flags f)
|
|
{
|
|
enum drbd_state_rv rv;
|
|
|
|
wait_event(device->state_wait,
|
|
(rv = drbd_req_state(device, mask, val, f)) != SS_IN_TRANSIENT_STATE);
|
|
|
|
return rv;
|
|
}
|
|
|
|
enum drbd_state_rv
|
|
_drbd_request_state_holding_state_mutex(struct drbd_device *device, union drbd_state mask,
|
|
union drbd_state val, enum chg_state_flags f)
|
|
{
|
|
enum drbd_state_rv rv;
|
|
|
|
BUG_ON(f & CS_SERIALIZE);
|
|
|
|
wait_event_cmd(device->state_wait,
|
|
(rv = drbd_req_state(device, mask, val, f)) != SS_IN_TRANSIENT_STATE,
|
|
mutex_unlock(device->state_mutex),
|
|
mutex_lock(device->state_mutex));
|
|
|
|
return rv;
|
|
}
|
|
|
|
static void print_st(struct drbd_device *device, const char *name, union drbd_state ns)
|
|
{
|
|
drbd_err(device, " %s = { cs:%s ro:%s/%s ds:%s/%s %c%c%c%c%c%c }\n",
|
|
name,
|
|
drbd_conn_str(ns.conn),
|
|
drbd_role_str(ns.role),
|
|
drbd_role_str(ns.peer),
|
|
drbd_disk_str(ns.disk),
|
|
drbd_disk_str(ns.pdsk),
|
|
is_susp(ns) ? 's' : 'r',
|
|
ns.aftr_isp ? 'a' : '-',
|
|
ns.peer_isp ? 'p' : '-',
|
|
ns.user_isp ? 'u' : '-',
|
|
ns.susp_fen ? 'F' : '-',
|
|
ns.susp_nod ? 'N' : '-'
|
|
);
|
|
}
|
|
|
|
void print_st_err(struct drbd_device *device, union drbd_state os,
|
|
union drbd_state ns, enum drbd_state_rv err)
|
|
{
|
|
if (err == SS_IN_TRANSIENT_STATE)
|
|
return;
|
|
drbd_err(device, "State change failed: %s\n", drbd_set_st_err_str(err));
|
|
print_st(device, " state", os);
|
|
print_st(device, "wanted", ns);
|
|
}
|
|
|
|
static long print_state_change(char *pb, union drbd_state os, union drbd_state ns,
|
|
enum chg_state_flags flags)
|
|
{
|
|
char *pbp;
|
|
pbp = pb;
|
|
*pbp = 0;
|
|
|
|
if (ns.role != os.role && flags & CS_DC_ROLE)
|
|
pbp += sprintf(pbp, "role( %s -> %s ) ",
|
|
drbd_role_str(os.role),
|
|
drbd_role_str(ns.role));
|
|
if (ns.peer != os.peer && flags & CS_DC_PEER)
|
|
pbp += sprintf(pbp, "peer( %s -> %s ) ",
|
|
drbd_role_str(os.peer),
|
|
drbd_role_str(ns.peer));
|
|
if (ns.conn != os.conn && flags & CS_DC_CONN)
|
|
pbp += sprintf(pbp, "conn( %s -> %s ) ",
|
|
drbd_conn_str(os.conn),
|
|
drbd_conn_str(ns.conn));
|
|
if (ns.disk != os.disk && flags & CS_DC_DISK)
|
|
pbp += sprintf(pbp, "disk( %s -> %s ) ",
|
|
drbd_disk_str(os.disk),
|
|
drbd_disk_str(ns.disk));
|
|
if (ns.pdsk != os.pdsk && flags & CS_DC_PDSK)
|
|
pbp += sprintf(pbp, "pdsk( %s -> %s ) ",
|
|
drbd_disk_str(os.pdsk),
|
|
drbd_disk_str(ns.pdsk));
|
|
|
|
return pbp - pb;
|
|
}
|
|
|
|
static void drbd_pr_state_change(struct drbd_device *device, union drbd_state os, union drbd_state ns,
|
|
enum chg_state_flags flags)
|
|
{
|
|
char pb[300];
|
|
char *pbp = pb;
|
|
|
|
pbp += print_state_change(pbp, os, ns, flags ^ CS_DC_MASK);
|
|
|
|
if (ns.aftr_isp != os.aftr_isp)
|
|
pbp += sprintf(pbp, "aftr_isp( %d -> %d ) ",
|
|
os.aftr_isp,
|
|
ns.aftr_isp);
|
|
if (ns.peer_isp != os.peer_isp)
|
|
pbp += sprintf(pbp, "peer_isp( %d -> %d ) ",
|
|
os.peer_isp,
|
|
ns.peer_isp);
|
|
if (ns.user_isp != os.user_isp)
|
|
pbp += sprintf(pbp, "user_isp( %d -> %d ) ",
|
|
os.user_isp,
|
|
ns.user_isp);
|
|
|
|
if (pbp != pb)
|
|
drbd_info(device, "%s\n", pb);
|
|
}
|
|
|
|
static void conn_pr_state_change(struct drbd_connection *connection, union drbd_state os, union drbd_state ns,
|
|
enum chg_state_flags flags)
|
|
{
|
|
char pb[300];
|
|
char *pbp = pb;
|
|
|
|
pbp += print_state_change(pbp, os, ns, flags);
|
|
|
|
if (is_susp(ns) != is_susp(os) && flags & CS_DC_SUSP)
|
|
pbp += sprintf(pbp, "susp( %d -> %d ) ",
|
|
is_susp(os),
|
|
is_susp(ns));
|
|
|
|
if (pbp != pb)
|
|
drbd_info(connection, "%s\n", pb);
|
|
}
|
|
|
|
|
|
/**
|
|
* is_valid_state() - Returns an SS_ error code if ns is not valid
|
|
* @device: DRBD device.
|
|
* @ns: State to consider.
|
|
*/
|
|
static enum drbd_state_rv
|
|
is_valid_state(struct drbd_device *device, 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(device)) {
|
|
fp = rcu_dereference(device->ldev->disk_conf)->fencing;
|
|
put_ldev(device);
|
|
}
|
|
|
|
nc = rcu_dereference(first_peer_device(device)->connection->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(first_peer_device(device)->connection) == R_PRIMARY)
|
|
rv = SS_O_VOL_PEER_PRI;
|
|
}
|
|
}
|
|
|
|
if (rv <= 0)
|
|
/* already found a reason to abort */;
|
|
else if (ns.role == R_SECONDARY && device->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) &&
|
|
first_peer_device(device)->connection->agreed_pro_version < 88)
|
|
rv = SS_NOT_SUPPORTED;
|
|
|
|
else if (ns.role == R_PRIMARY && ns.disk < D_UP_TO_DATE && ns.pdsk < D_UP_TO_DATE)
|
|
rv = SS_NO_UP_TO_DATE_DISK;
|
|
|
|
else if ((ns.conn == C_STARTING_SYNC_S || ns.conn == C_STARTING_SYNC_T) &&
|
|
ns.pdsk == D_UNKNOWN)
|
|
rv = SS_NEED_CONNECTION;
|
|
|
|
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).
|
|
* @device: 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, struct drbd_connection *connection)
|
|
{
|
|
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;
|
|
|
|
/* While establishing a connection only allow cstate to change.
|
|
Delay/refuse role changes, detach attach etc... (they do not touch cstate) */
|
|
if (test_bit(STATE_SENT, &connection->flags) &&
|
|
!((ns.conn == C_WF_REPORT_PARAMS && os.conn == C_WF_CONNECTION) ||
|
|
(ns.conn >= C_CONNECTED && os.conn == C_WF_REPORT_PARAMS)))
|
|
rv = SS_IN_TRANSIENT_STATE;
|
|
|
|
/* Do not promote during resync handshake triggered by "force primary".
|
|
* This is a hack. It should really be rejected by the peer during the
|
|
* cluster wide state change request. */
|
|
if (os.role != R_PRIMARY && ns.role == R_PRIMARY
|
|
&& ns.pdsk == D_UP_TO_DATE
|
|
&& ns.disk != D_UP_TO_DATE && ns.disk != D_DISKLESS
|
|
&& (ns.conn <= C_WF_SYNC_UUID || ns.conn != os.conn))
|
|
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... */
|
|
|
|
if (ns.conn == C_DISCONNECTING && ns.pdsk == D_OUTDATED &&
|
|
os.conn < C_CONNECTED && os.pdsk > D_OUTDATED)
|
|
rv = SS_OUTDATE_WO_CONN;
|
|
|
|
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;
|
|
|
|
/* When establishing a connection we need to go through WF_REPORT_PARAMS!
|
|
Necessary to do the right thing upon invalidate-remote on a disconnected resource */
|
|
if (oc < C_WF_REPORT_PARAMS && nc >= C_CONNECTED)
|
|
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;
|
|
|
|
return rv;
|
|
}
|
|
|
|
static void print_sanitize_warnings(struct drbd_device *device, enum sanitize_state_warnings warn)
|
|
{
|
|
static const char *msg_table[] = {
|
|
[NO_WARNING] = "",
|
|
[ABORTED_ONLINE_VERIFY] = "Online-verify aborted.",
|
|
[ABORTED_RESYNC] = "Resync aborted.",
|
|
[CONNECTION_LOST_NEGOTIATING] = "Connection lost while negotiating, no data!",
|
|
[IMPLICITLY_UPGRADED_DISK] = "Implicitly upgraded disk",
|
|
[IMPLICITLY_UPGRADED_PDSK] = "Implicitly upgraded pdsk",
|
|
};
|
|
|
|
if (warn != NO_WARNING)
|
|
drbd_warn(device, "%s\n", msg_table[warn]);
|
|
}
|
|
|
|
/**
|
|
* sanitize_state() - Resolves implicitly necessary additional changes to a state transition
|
|
* @device: 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_device *device, union drbd_state os,
|
|
union drbd_state ns, enum sanitize_state_warnings *warn)
|
|
{
|
|
enum drbd_fencing_p fp;
|
|
enum drbd_disk_state disk_min, disk_max, pdsk_min, pdsk_max;
|
|
|
|
if (warn)
|
|
*warn = NO_WARNING;
|
|
|
|
fp = FP_DONT_CARE;
|
|
if (get_ldev(device)) {
|
|
rcu_read_lock();
|
|
fp = rcu_dereference(device->ldev->disk_conf)->fencing;
|
|
rcu_read_unlock();
|
|
put_ldev(device);
|
|
}
|
|
|
|
/* 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)
|
|
*warn = ns.conn == C_VERIFY_S || ns.conn == C_VERIFY_T ?
|
|
ABORTED_ONLINE_VERIFY : ABORTED_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(device, D_NEGOTIATING)) {
|
|
if (device->ed_uuid == device->ldev->md.uuid[UI_CURRENT]) {
|
|
ns.disk = device->new_state_tmp.disk;
|
|
ns.pdsk = device->new_state_tmp.pdsk;
|
|
} else {
|
|
if (warn)
|
|
*warn = CONNECTION_LOST_NEGOTIATING;
|
|
ns.disk = D_DISKLESS;
|
|
ns.pdsk = D_UNKNOWN;
|
|
}
|
|
put_ldev(device);
|
|
}
|
|
|
|
/* 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) {
|
|
if (warn)
|
|
*warn = IMPLICITLY_UPGRADED_DISK;
|
|
ns.disk = disk_min;
|
|
}
|
|
if (ns.pdsk > pdsk_max)
|
|
ns.pdsk = pdsk_max;
|
|
|
|
if (ns.pdsk < pdsk_min) {
|
|
if (warn)
|
|
*warn = IMPLICITLY_UPGRADED_PDSK;
|
|
ns.pdsk = pdsk_min;
|
|
}
|
|
|
|
if (fp == FP_STONITH &&
|
|
(ns.role == R_PRIMARY && ns.conn < C_CONNECTED && ns.pdsk > D_OUTDATED) &&
|
|
!(os.role == R_PRIMARY && os.conn < C_CONNECTED && os.pdsk > D_OUTDATED))
|
|
ns.susp_fen = 1; /* Suspend IO while fence-peer handler runs (peer lost) */
|
|
|
|
if (device->resource->res_opts.on_no_data == OND_SUSPEND_IO &&
|
|
(ns.role == R_PRIMARY && ns.disk < D_UP_TO_DATE && ns.pdsk < D_UP_TO_DATE) &&
|
|
!(os.role == R_PRIMARY && os.disk < D_UP_TO_DATE && os.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_device *device)
|
|
{
|
|
if (test_and_clear_bit(AL_SUSPENDED, &device->flags))
|
|
drbd_info(device, "Resumed AL updates\n");
|
|
}
|
|
|
|
/* helper for _drbd_set_state */
|
|
static void set_ov_position(struct drbd_device *device, enum drbd_conns cs)
|
|
{
|
|
if (first_peer_device(device)->connection->agreed_pro_version < 90)
|
|
device->ov_start_sector = 0;
|
|
device->rs_total = drbd_bm_bits(device);
|
|
device->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 */
|
|
device->ov_start_sector = ~(sector_t)0;
|
|
} else {
|
|
unsigned long bit = BM_SECT_TO_BIT(device->ov_start_sector);
|
|
if (bit >= device->rs_total) {
|
|
device->ov_start_sector =
|
|
BM_BIT_TO_SECT(device->rs_total - 1);
|
|
device->rs_total = 1;
|
|
} else
|
|
device->rs_total -= bit;
|
|
device->ov_position = device->ov_start_sector;
|
|
}
|
|
device->ov_left = device->rs_total;
|
|
}
|
|
|
|
/**
|
|
* _drbd_set_state() - Set a new DRBD state
|
|
* @device: 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. Do not call directly.
|
|
*/
|
|
enum drbd_state_rv
|
|
_drbd_set_state(struct drbd_device *device, union drbd_state ns,
|
|
enum chg_state_flags flags, struct completion *done)
|
|
{
|
|
struct drbd_peer_device *peer_device = first_peer_device(device);
|
|
struct drbd_connection *connection = peer_device ? peer_device->connection : NULL;
|
|
union drbd_state os;
|
|
enum drbd_state_rv rv = SS_SUCCESS;
|
|
enum sanitize_state_warnings ssw;
|
|
struct after_state_chg_work *ascw;
|
|
struct drbd_state_change *state_change;
|
|
|
|
os = drbd_read_state(device);
|
|
|
|
ns = sanitize_state(device, os, ns, &ssw);
|
|
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(device, ns);
|
|
if (rv < SS_SUCCESS) {
|
|
/* If the old state was illegal as well, then let
|
|
this happen...*/
|
|
|
|
if (is_valid_state(device, os) == rv)
|
|
rv = is_valid_soft_transition(os, ns, connection);
|
|
} else
|
|
rv = is_valid_soft_transition(os, ns, connection);
|
|
}
|
|
|
|
if (rv < SS_SUCCESS) {
|
|
if (flags & CS_VERBOSE)
|
|
print_st_err(device, os, ns, rv);
|
|
return rv;
|
|
}
|
|
|
|
print_sanitize_warnings(device, ssw);
|
|
|
|
drbd_pr_state_change(device, 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(connection, 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(&device->local_cnt);
|
|
|
|
if (!is_sync_state(os.conn) && is_sync_state(ns.conn))
|
|
clear_bit(RS_DONE, &device->flags);
|
|
|
|
/* FIXME: Have any flags been set earlier in this function already? */
|
|
state_change = remember_old_state(device->resource, GFP_ATOMIC);
|
|
|
|
/* changes to local_cnt and device flags should be visible before
|
|
* changes to state, which again should be visible before anything else
|
|
* depending on that change happens. */
|
|
smp_wmb();
|
|
device->state.i = ns.i;
|
|
device->resource->susp = ns.susp;
|
|
device->resource->susp_nod = ns.susp_nod;
|
|
device->resource->susp_fen = ns.susp_fen;
|
|
smp_wmb();
|
|
|
|
remember_new_state(state_change);
|
|
|
|
/* put replicated vs not-replicated requests in seperate epochs */
|
|
if (drbd_should_do_remote((union drbd_dev_state)os.i) !=
|
|
drbd_should_do_remote((union drbd_dev_state)ns.i))
|
|
start_new_tl_epoch(connection);
|
|
|
|
if (os.disk == D_ATTACHING && ns.disk >= D_NEGOTIATING)
|
|
drbd_print_uuids(device, "attached to UUIDs");
|
|
|
|
/* Wake up role changes, that were delayed because of connection establishing */
|
|
if (os.conn == C_WF_REPORT_PARAMS && ns.conn != C_WF_REPORT_PARAMS &&
|
|
no_peer_wf_report_params(connection)) {
|
|
clear_bit(STATE_SENT, &connection->flags);
|
|
wake_up_all_devices(connection);
|
|
}
|
|
|
|
wake_up(&device->misc_wait);
|
|
wake_up(&device->state_wait);
|
|
wake_up(&connection->ping_wait);
|
|
|
|
/* Aborted verify run, or we reached the stop sector.
|
|
* Log the last position, unless end-of-device. */
|
|
if ((os.conn == C_VERIFY_S || os.conn == C_VERIFY_T) &&
|
|
ns.conn <= C_CONNECTED) {
|
|
device->ov_start_sector =
|
|
BM_BIT_TO_SECT(drbd_bm_bits(device) - device->ov_left);
|
|
if (device->ov_left)
|
|
drbd_info(device, "Online Verify reached sector %llu\n",
|
|
(unsigned long long)device->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)) {
|
|
drbd_info(device, "Syncer continues.\n");
|
|
device->rs_paused += (long)jiffies
|
|
-(long)device->rs_mark_time[device->rs_last_mark];
|
|
if (ns.conn == C_SYNC_TARGET)
|
|
mod_timer(&device->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)) {
|
|
drbd_info(device, "Resync suspended\n");
|
|
device->rs_mark_time[device->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(device, ns.conn);
|
|
device->rs_start = now;
|
|
device->rs_last_sect_ev = 0;
|
|
device->ov_last_oos_size = 0;
|
|
device->ov_last_oos_start = 0;
|
|
|
|
for (i = 0; i < DRBD_SYNC_MARKS; i++) {
|
|
device->rs_mark_left[i] = device->ov_left;
|
|
device->rs_mark_time[i] = now;
|
|
}
|
|
|
|
drbd_rs_controller_reset(device);
|
|
|
|
if (ns.conn == C_VERIFY_S) {
|
|
drbd_info(device, "Starting Online Verify from sector %llu\n",
|
|
(unsigned long long)device->ov_position);
|
|
mod_timer(&device->resync_timer, jiffies);
|
|
}
|
|
}
|
|
|
|
if (get_ldev(device)) {
|
|
u32 mdf = device->ldev->md.flags & ~(MDF_CONSISTENT|MDF_PRIMARY_IND|
|
|
MDF_CONNECTED_IND|MDF_WAS_UP_TO_DATE|
|
|
MDF_PEER_OUT_DATED|MDF_CRASHED_PRIMARY);
|
|
|
|
mdf &= ~MDF_AL_CLEAN;
|
|
if (test_bit(CRASHED_PRIMARY, &device->flags))
|
|
mdf |= MDF_CRASHED_PRIMARY;
|
|
if (device->state.role == R_PRIMARY ||
|
|
(device->state.pdsk < D_INCONSISTENT && device->state.peer == R_PRIMARY))
|
|
mdf |= MDF_PRIMARY_IND;
|
|
if (device->state.conn > C_WF_REPORT_PARAMS)
|
|
mdf |= MDF_CONNECTED_IND;
|
|
if (device->state.disk > D_INCONSISTENT)
|
|
mdf |= MDF_CONSISTENT;
|
|
if (device->state.disk > D_OUTDATED)
|
|
mdf |= MDF_WAS_UP_TO_DATE;
|
|
if (device->state.pdsk <= D_OUTDATED && device->state.pdsk >= D_INCONSISTENT)
|
|
mdf |= MDF_PEER_OUT_DATED;
|
|
if (mdf != device->ldev->md.flags) {
|
|
device->ldev->md.flags = mdf;
|
|
drbd_md_mark_dirty(device);
|
|
}
|
|
if (os.disk < D_CONSISTENT && ns.disk >= D_CONSISTENT)
|
|
drbd_set_ed_uuid(device, device->ldev->md.uuid[UI_CURRENT]);
|
|
put_ldev(device);
|
|
}
|
|
|
|
/* 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, &device->flags);
|
|
|
|
/* Receiver should clean up itself */
|
|
if (os.conn != C_DISCONNECTING && ns.conn == C_DISCONNECTING)
|
|
drbd_thread_stop_nowait(&connection->receiver);
|
|
|
|
/* Now the receiver finished cleaning up itself, it should die */
|
|
if (os.conn != C_STANDALONE && ns.conn == C_STANDALONE)
|
|
drbd_thread_stop_nowait(&connection->receiver);
|
|
|
|
/* Upon network failure, we need to restart the receiver. */
|
|
if (os.conn > C_WF_CONNECTION &&
|
|
ns.conn <= C_TEAR_DOWN && ns.conn >= C_TIMEOUT)
|
|
drbd_thread_restart_nowait(&connection->receiver);
|
|
|
|
/* Resume AL writing if we get a connection */
|
|
if (os.conn < C_CONNECTED && ns.conn >= C_CONNECTED) {
|
|
drbd_resume_al(device);
|
|
connection->connect_cnt++;
|
|
}
|
|
|
|
/* remember last attach time so request_timer_fn() won't
|
|
* kill newly established sessions while we are still trying to thaw
|
|
* previously frozen IO */
|
|
if ((os.disk == D_ATTACHING || os.disk == D_NEGOTIATING) &&
|
|
ns.disk > D_NEGOTIATING)
|
|
device->last_reattach_jif = jiffies;
|
|
|
|
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->device = device;
|
|
ascw->done = done;
|
|
ascw->state_change = state_change;
|
|
drbd_queue_work(&connection->sender_work,
|
|
&ascw->w);
|
|
} else {
|
|
drbd_err(device, "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_device *device = ascw->device;
|
|
|
|
after_state_ch(device, ascw->os, ascw->ns, ascw->flags, ascw->state_change);
|
|
forget_state_change(ascw->state_change);
|
|
if (ascw->flags & CS_WAIT_COMPLETE)
|
|
complete(ascw->done);
|
|
kfree(ascw);
|
|
|
|
return 0;
|
|
}
|
|
|
|
static void abw_start_sync(struct drbd_device *device, int rv)
|
|
{
|
|
if (rv) {
|
|
drbd_err(device, "Writing the bitmap failed not starting resync.\n");
|
|
_drbd_request_state(device, NS(conn, C_CONNECTED), CS_VERBOSE);
|
|
return;
|
|
}
|
|
|
|
switch (device->state.conn) {
|
|
case C_STARTING_SYNC_T:
|
|
_drbd_request_state(device, NS(conn, C_WF_SYNC_UUID), CS_VERBOSE);
|
|
break;
|
|
case C_STARTING_SYNC_S:
|
|
drbd_start_resync(device, C_SYNC_SOURCE);
|
|
break;
|
|
}
|
|
}
|
|
|
|
int drbd_bitmap_io_from_worker(struct drbd_device *device,
|
|
int (*io_fn)(struct drbd_device *),
|
|
char *why, enum bm_flag flags)
|
|
{
|
|
int rv;
|
|
|
|
D_ASSERT(device, current == first_peer_device(device)->connection->worker.task);
|
|
|
|
/* open coded non-blocking drbd_suspend_io(device); */
|
|
atomic_inc(&device->suspend_cnt);
|
|
|
|
drbd_bm_lock(device, why, flags);
|
|
rv = io_fn(device);
|
|
drbd_bm_unlock(device);
|
|
|
|
drbd_resume_io(device);
|
|
|
|
return rv;
|
|
}
|
|
|
|
void notify_resource_state_change(struct sk_buff *skb,
|
|
unsigned int seq,
|
|
struct drbd_resource_state_change *resource_state_change,
|
|
enum drbd_notification_type type)
|
|
{
|
|
struct drbd_resource *resource = resource_state_change->resource;
|
|
struct resource_info resource_info = {
|
|
.res_role = resource_state_change->role[NEW],
|
|
.res_susp = resource_state_change->susp[NEW],
|
|
.res_susp_nod = resource_state_change->susp_nod[NEW],
|
|
.res_susp_fen = resource_state_change->susp_fen[NEW],
|
|
};
|
|
|
|
notify_resource_state(skb, seq, resource, &resource_info, type);
|
|
}
|
|
|
|
void notify_connection_state_change(struct sk_buff *skb,
|
|
unsigned int seq,
|
|
struct drbd_connection_state_change *connection_state_change,
|
|
enum drbd_notification_type type)
|
|
{
|
|
struct drbd_connection *connection = connection_state_change->connection;
|
|
struct connection_info connection_info = {
|
|
.conn_connection_state = connection_state_change->cstate[NEW],
|
|
.conn_role = connection_state_change->peer_role[NEW],
|
|
};
|
|
|
|
notify_connection_state(skb, seq, connection, &connection_info, type);
|
|
}
|
|
|
|
void notify_device_state_change(struct sk_buff *skb,
|
|
unsigned int seq,
|
|
struct drbd_device_state_change *device_state_change,
|
|
enum drbd_notification_type type)
|
|
{
|
|
struct drbd_device *device = device_state_change->device;
|
|
struct device_info device_info = {
|
|
.dev_disk_state = device_state_change->disk_state[NEW],
|
|
};
|
|
|
|
notify_device_state(skb, seq, device, &device_info, type);
|
|
}
|
|
|
|
void notify_peer_device_state_change(struct sk_buff *skb,
|
|
unsigned int seq,
|
|
struct drbd_peer_device_state_change *p,
|
|
enum drbd_notification_type type)
|
|
{
|
|
struct drbd_peer_device *peer_device = p->peer_device;
|
|
struct peer_device_info peer_device_info = {
|
|
.peer_repl_state = p->repl_state[NEW],
|
|
.peer_disk_state = p->disk_state[NEW],
|
|
.peer_resync_susp_user = p->resync_susp_user[NEW],
|
|
.peer_resync_susp_peer = p->resync_susp_peer[NEW],
|
|
.peer_resync_susp_dependency = p->resync_susp_dependency[NEW],
|
|
};
|
|
|
|
notify_peer_device_state(skb, seq, peer_device, &peer_device_info, type);
|
|
}
|
|
|
|
static void broadcast_state_change(struct drbd_state_change *state_change)
|
|
{
|
|
struct drbd_resource_state_change *resource_state_change = &state_change->resource[0];
|
|
bool resource_state_has_changed;
|
|
unsigned int n_device, n_connection, n_peer_device, n_peer_devices;
|
|
void (*last_func)(struct sk_buff *, unsigned int, void *,
|
|
enum drbd_notification_type) = NULL;
|
|
void *uninitialized_var(last_arg);
|
|
|
|
#define HAS_CHANGED(state) ((state)[OLD] != (state)[NEW])
|
|
#define FINAL_STATE_CHANGE(type) \
|
|
({ if (last_func) \
|
|
last_func(NULL, 0, last_arg, type); \
|
|
})
|
|
#define REMEMBER_STATE_CHANGE(func, arg, type) \
|
|
({ FINAL_STATE_CHANGE(type | NOTIFY_CONTINUES); \
|
|
last_func = (typeof(last_func))func; \
|
|
last_arg = arg; \
|
|
})
|
|
|
|
mutex_lock(¬ification_mutex);
|
|
|
|
resource_state_has_changed =
|
|
HAS_CHANGED(resource_state_change->role) ||
|
|
HAS_CHANGED(resource_state_change->susp) ||
|
|
HAS_CHANGED(resource_state_change->susp_nod) ||
|
|
HAS_CHANGED(resource_state_change->susp_fen);
|
|
|
|
if (resource_state_has_changed)
|
|
REMEMBER_STATE_CHANGE(notify_resource_state_change,
|
|
resource_state_change, NOTIFY_CHANGE);
|
|
|
|
for (n_connection = 0; n_connection < state_change->n_connections; n_connection++) {
|
|
struct drbd_connection_state_change *connection_state_change =
|
|
&state_change->connections[n_connection];
|
|
|
|
if (HAS_CHANGED(connection_state_change->peer_role) ||
|
|
HAS_CHANGED(connection_state_change->cstate))
|
|
REMEMBER_STATE_CHANGE(notify_connection_state_change,
|
|
connection_state_change, NOTIFY_CHANGE);
|
|
}
|
|
|
|
for (n_device = 0; n_device < state_change->n_devices; n_device++) {
|
|
struct drbd_device_state_change *device_state_change =
|
|
&state_change->devices[n_device];
|
|
|
|
if (HAS_CHANGED(device_state_change->disk_state))
|
|
REMEMBER_STATE_CHANGE(notify_device_state_change,
|
|
device_state_change, NOTIFY_CHANGE);
|
|
}
|
|
|
|
n_peer_devices = state_change->n_devices * state_change->n_connections;
|
|
for (n_peer_device = 0; n_peer_device < n_peer_devices; n_peer_device++) {
|
|
struct drbd_peer_device_state_change *p =
|
|
&state_change->peer_devices[n_peer_device];
|
|
|
|
if (HAS_CHANGED(p->disk_state) ||
|
|
HAS_CHANGED(p->repl_state) ||
|
|
HAS_CHANGED(p->resync_susp_user) ||
|
|
HAS_CHANGED(p->resync_susp_peer) ||
|
|
HAS_CHANGED(p->resync_susp_dependency))
|
|
REMEMBER_STATE_CHANGE(notify_peer_device_state_change,
|
|
p, NOTIFY_CHANGE);
|
|
}
|
|
|
|
FINAL_STATE_CHANGE(NOTIFY_CHANGE);
|
|
mutex_unlock(¬ification_mutex);
|
|
|
|
#undef HAS_CHANGED
|
|
#undef FINAL_STATE_CHANGE
|
|
#undef REMEMBER_STATE_CHANGE
|
|
}
|
|
|
|
/* takes old and new peer disk state */
|
|
static bool lost_contact_to_peer_data(enum drbd_disk_state os, enum drbd_disk_state ns)
|
|
{
|
|
if ((os >= D_INCONSISTENT && os != D_UNKNOWN && os != D_OUTDATED)
|
|
&& (ns < D_INCONSISTENT || ns == D_UNKNOWN || ns == D_OUTDATED))
|
|
return true;
|
|
|
|
/* Scenario, starting with normal operation
|
|
* Connected Primary/Secondary UpToDate/UpToDate
|
|
* NetworkFailure Primary/Unknown UpToDate/DUnknown (frozen)
|
|
* ...
|
|
* Connected Primary/Secondary UpToDate/Diskless (resumed; needs to bump uuid!)
|
|
*/
|
|
if (os == D_UNKNOWN
|
|
&& (ns == D_DISKLESS || ns == D_FAILED || ns == D_OUTDATED))
|
|
return true;
|
|
|
|
return false;
|
|
}
|
|
|
|
/**
|
|
* after_state_ch() - Perform after state change actions that may sleep
|
|
* @device: DRBD device.
|
|
* @os: old state.
|
|
* @ns: new state.
|
|
* @flags: Flags
|
|
*/
|
|
static void after_state_ch(struct drbd_device *device, union drbd_state os,
|
|
union drbd_state ns, enum chg_state_flags flags,
|
|
struct drbd_state_change *state_change)
|
|
{
|
|
struct drbd_resource *resource = device->resource;
|
|
struct drbd_peer_device *peer_device = first_peer_device(device);
|
|
struct drbd_connection *connection = peer_device ? peer_device->connection : NULL;
|
|
struct sib_info sib;
|
|
|
|
broadcast_state_change(state_change);
|
|
|
|
sib.sib_reason = SIB_STATE_CHANGE;
|
|
sib.os = os;
|
|
sib.ns = ns;
|
|
|
|
if ((os.disk != D_UP_TO_DATE || os.pdsk != D_UP_TO_DATE)
|
|
&& (ns.disk == D_UP_TO_DATE && ns.pdsk == D_UP_TO_DATE)) {
|
|
clear_bit(CRASHED_PRIMARY, &device->flags);
|
|
if (device->p_uuid)
|
|
device->p_uuid[UI_FLAGS] &= ~((u64)2);
|
|
}
|
|
|
|
/* Inform userspace about the change... */
|
|
drbd_bcast_event(device, &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(device, "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;
|
|
|
|
spin_lock_irq(&device->resource->req_lock);
|
|
if (os.conn < C_CONNECTED && conn_lowest_conn(connection) >= C_CONNECTED)
|
|
what = RESEND;
|
|
|
|
if ((os.disk == D_ATTACHING || os.disk == D_NEGOTIATING) &&
|
|
conn_lowest_disk(connection) == D_UP_TO_DATE)
|
|
what = RESTART_FROZEN_DISK_IO;
|
|
|
|
if (resource->susp_nod && what != NOTHING) {
|
|
_tl_restart(connection, what);
|
|
_conn_request_state(connection,
|
|
(union drbd_state) { { .susp_nod = 1 } },
|
|
(union drbd_state) { { .susp_nod = 0 } },
|
|
CS_VERBOSE);
|
|
}
|
|
spin_unlock_irq(&device->resource->req_lock);
|
|
}
|
|
|
|
if (ns.susp_fen) {
|
|
spin_lock_irq(&device->resource->req_lock);
|
|
if (resource->susp_fen && conn_lowest_conn(connection) >= C_CONNECTED) {
|
|
/* case2: The connection was established again: */
|
|
struct drbd_peer_device *peer_device;
|
|
int vnr;
|
|
|
|
rcu_read_lock();
|
|
idr_for_each_entry(&connection->peer_devices, peer_device, vnr)
|
|
clear_bit(NEW_CUR_UUID, &peer_device->device->flags);
|
|
rcu_read_unlock();
|
|
|
|
/* We should actively create a new uuid, _before_
|
|
* we resume/resent, if the peer is diskless
|
|
* (recovery from a multiple error scenario).
|
|
* Currently, this happens with a slight delay
|
|
* below when checking lost_contact_to_peer_data() ...
|
|
*/
|
|
_tl_restart(connection, RESEND);
|
|
_conn_request_state(connection,
|
|
(union drbd_state) { { .susp_fen = 1 } },
|
|
(union drbd_state) { { .susp_fen = 0 } },
|
|
CS_VERBOSE);
|
|
}
|
|
spin_unlock_irq(&device->resource->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) &&
|
|
connection->agreed_pro_version >= 96 && get_ldev(device)) {
|
|
drbd_gen_and_send_sync_uuid(peer_device);
|
|
put_ldev(device);
|
|
}
|
|
|
|
/* Do not change the order of the if above and the two below... */
|
|
if (os.pdsk == D_DISKLESS &&
|
|
ns.pdsk > D_DISKLESS && ns.pdsk != D_UNKNOWN) { /* attach on the peer */
|
|
/* we probably will start a resync soon.
|
|
* make sure those things are properly reset. */
|
|
device->rs_total = 0;
|
|
device->rs_failed = 0;
|
|
atomic_set(&device->rs_pending_cnt, 0);
|
|
drbd_rs_cancel_all(device);
|
|
|
|
drbd_send_uuids(peer_device);
|
|
drbd_send_state(peer_device, ns);
|
|
}
|
|
/* 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 &&
|
|
device->state.conn == C_WF_BITMAP_S)
|
|
drbd_queue_bitmap_io(device, &drbd_send_bitmap, NULL,
|
|
"send_bitmap (WFBitMapS)",
|
|
BM_LOCKED_TEST_ALLOWED);
|
|
|
|
/* Lost contact to peer's copy of the data */
|
|
if (lost_contact_to_peer_data(os.pdsk, ns.pdsk)) {
|
|
if (get_ldev(device)) {
|
|
if ((ns.role == R_PRIMARY || ns.peer == R_PRIMARY) &&
|
|
device->ldev->md.uuid[UI_BITMAP] == 0 && ns.disk >= D_UP_TO_DATE) {
|
|
if (drbd_suspended(device)) {
|
|
set_bit(NEW_CUR_UUID, &device->flags);
|
|
} else {
|
|
drbd_uuid_new_current(device);
|
|
drbd_send_uuids(peer_device);
|
|
}
|
|
}
|
|
put_ldev(device);
|
|
}
|
|
}
|
|
|
|
if (ns.pdsk < D_INCONSISTENT && get_ldev(device)) {
|
|
if (os.peer != R_PRIMARY && ns.peer == R_PRIMARY &&
|
|
device->ldev->md.uuid[UI_BITMAP] == 0 && ns.disk >= D_UP_TO_DATE) {
|
|
drbd_uuid_new_current(device);
|
|
drbd_send_uuids(peer_device);
|
|
}
|
|
/* 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(device, &drbd_bm_write,
|
|
"demote diskless peer", BM_LOCKED_SET_ALLOWED);
|
|
put_ldev(device);
|
|
}
|
|
|
|
/* 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 &&
|
|
device->state.conn <= C_CONNECTED && get_ldev(device)) {
|
|
/* 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(device, &drbd_bm_write,
|
|
"demote", BM_LOCKED_TEST_ALLOWED);
|
|
put_ldev(device);
|
|
}
|
|
|
|
/* Last part of the attaching process ... */
|
|
if (ns.conn >= C_CONNECTED &&
|
|
os.disk == D_ATTACHING && ns.disk == D_NEGOTIATING) {
|
|
drbd_send_sizes(peer_device, 0, 0); /* to start sync... */
|
|
drbd_send_uuids(peer_device);
|
|
drbd_send_state(peer_device, ns);
|
|
}
|
|
|
|
/* 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(peer_device, ns);
|
|
|
|
/* 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(device);
|
|
|
|
/* 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(peer_device, ns);
|
|
|
|
if (os.conn != C_AHEAD && ns.conn == C_AHEAD)
|
|
drbd_send_state(peer_device, ns);
|
|
|
|
/* 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(device,
|
|
&drbd_bmio_set_n_write, &abw_start_sync,
|
|
"set_n_write from StartingSync", BM_LOCKED_TEST_ALLOWED);
|
|
|
|
/* 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 = EP_PASS_ON;
|
|
int was_io_error = 0;
|
|
/* corresponding get_ldev was in _drbd_set_state, to serialize
|
|
* our cleanup here with the transition to D_DISKLESS.
|
|
* But is is still not save to dreference ldev here, since
|
|
* we might come from an failed Attach before ldev was set. */
|
|
if (device->ldev) {
|
|
rcu_read_lock();
|
|
eh = rcu_dereference(device->ldev->disk_conf)->on_io_error;
|
|
rcu_read_unlock();
|
|
|
|
was_io_error = test_and_clear_bit(WAS_IO_ERROR, &device->flags);
|
|
|
|
/* Intentionally call this handler first, before drbd_send_state().
|
|
* See: 2932204 drbd: call local-io-error handler early
|
|
* People may chose to hard-reset the box from this handler.
|
|
* It is useful if this looks like a "regular node crash". */
|
|
if (was_io_error && eh == EP_CALL_HELPER)
|
|
drbd_khelper(device, "local-io-error");
|
|
|
|
/* Immediately allow completion of all application IO,
|
|
* that waits for completion from the local disk,
|
|
* if this was a force-detach due to disk_timeout
|
|
* or administrator request (drbdsetup detach --force).
|
|
* Do NOT abort otherwise.
|
|
* Aborting local requests may cause serious problems,
|
|
* if requests are completed to upper layers already,
|
|
* and then later the already submitted local bio completes.
|
|
* This can cause DMA into former bio pages that meanwhile
|
|
* have been re-used for other things.
|
|
* So aborting local requests may cause crashes,
|
|
* or even worse, silent data corruption.
|
|
*/
|
|
if (test_and_clear_bit(FORCE_DETACH, &device->flags))
|
|
tl_abort_disk_io(device);
|
|
|
|
/* 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 (device->state.disk != D_FAILED)
|
|
drbd_err(device,
|
|
"ASSERT FAILED: disk is %s during detach\n",
|
|
drbd_disk_str(device->state.disk));
|
|
|
|
if (ns.conn >= C_CONNECTED)
|
|
drbd_send_state(peer_device, ns);
|
|
|
|
drbd_rs_cancel_all(device);
|
|
|
|
/* 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(device);
|
|
}
|
|
put_ldev(device);
|
|
}
|
|
|
|
/* 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 (device->state.disk != D_DISKLESS)
|
|
drbd_err(device,
|
|
"ASSERT FAILED: disk is %s while going diskless\n",
|
|
drbd_disk_str(device->state.disk));
|
|
|
|
if (ns.conn >= C_CONNECTED)
|
|
drbd_send_state(peer_device, ns);
|
|
/* corresponding get_ldev in __drbd_set_state
|
|
* this may finally trigger drbd_ldev_destroy. */
|
|
put_ldev(device);
|
|
}
|
|
|
|
/* Notify peer that I had a local IO error, and did not detached.. */
|
|
if (os.disk == D_UP_TO_DATE && ns.disk == D_INCONSISTENT && ns.conn >= C_CONNECTED)
|
|
drbd_send_state(peer_device, ns);
|
|
|
|
/* Disks got bigger while they were detached */
|
|
if (ns.disk > D_NEGOTIATING && ns.pdsk > D_NEGOTIATING &&
|
|
test_and_clear_bit(RESYNC_AFTER_NEG, &device->flags)) {
|
|
if (ns.conn == C_CONNECTED)
|
|
resync_after_online_grow(device);
|
|
}
|
|
|
|
/* 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(device);
|
|
|
|
/* 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(peer_device, ns);
|
|
|
|
/* Verify finished, or reached stop sector. Peer did not know about
|
|
* the stop sector, and we may even have changed the stop sector during
|
|
* verify to interrupt/stop early. Send the new state. */
|
|
if (os.conn == C_VERIFY_S && ns.conn == C_CONNECTED
|
|
&& verify_can_do_stop_sector(device))
|
|
drbd_send_state(peer_device, ns);
|
|
|
|
/* This triggers bitmap writeout of potentially still unwritten pages
|
|
* if the resync finished cleanly, or aborted because of peer disk
|
|
* failure, or on transition from resync back to AHEAD/BEHIND.
|
|
*
|
|
* Connection loss is handled in drbd_disconnected() by the receiver.
|
|
*
|
|
* 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 && os.conn < C_AHEAD) &&
|
|
(ns.conn == C_CONNECTED || ns.conn >= C_AHEAD) && get_ldev(device)) {
|
|
drbd_queue_bitmap_io(device, &drbd_bm_write_copy_pages, NULL,
|
|
"write from resync_finished", BM_LOCKED_CHANGE_ALLOWED);
|
|
put_ldev(device);
|
|
}
|
|
|
|
if (ns.disk == D_DISKLESS &&
|
|
ns.conn == C_STANDALONE &&
|
|
ns.role == R_SECONDARY) {
|
|
if (os.aftr_isp != ns.aftr_isp)
|
|
resume_next_sg(device);
|
|
}
|
|
|
|
drbd_md_sync(device);
|
|
}
|
|
|
|
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 devices */
|
|
enum chg_state_flags flags;
|
|
struct drbd_connection *connection;
|
|
struct drbd_state_change *state_change;
|
|
};
|
|
|
|
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_connection *connection = acscw->connection;
|
|
enum drbd_conns oc = acscw->oc;
|
|
union drbd_state ns_max = acscw->ns_max;
|
|
struct drbd_peer_device *peer_device;
|
|
int vnr;
|
|
|
|
broadcast_state_change(acscw->state_change);
|
|
forget_state_change(acscw->state_change);
|
|
kfree(acscw);
|
|
|
|
/* Upon network configuration, we need to start the receiver */
|
|
if (oc == C_STANDALONE && ns_max.conn == C_UNCONNECTED)
|
|
drbd_thread_start(&connection->receiver);
|
|
|
|
if (oc == C_DISCONNECTING && ns_max.conn == C_STANDALONE) {
|
|
struct net_conf *old_conf;
|
|
|
|
mutex_lock(¬ification_mutex);
|
|
idr_for_each_entry(&connection->peer_devices, peer_device, vnr)
|
|
notify_peer_device_state(NULL, 0, peer_device, NULL,
|
|
NOTIFY_DESTROY | NOTIFY_CONTINUES);
|
|
notify_connection_state(NULL, 0, connection, NULL, NOTIFY_DESTROY);
|
|
mutex_unlock(¬ification_mutex);
|
|
|
|
mutex_lock(&connection->resource->conf_update);
|
|
old_conf = connection->net_conf;
|
|
connection->my_addr_len = 0;
|
|
connection->peer_addr_len = 0;
|
|
RCU_INIT_POINTER(connection->net_conf, NULL);
|
|
conn_free_crypto(connection);
|
|
mutex_unlock(&connection->resource->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) {
|
|
rcu_read_lock();
|
|
idr_for_each_entry(&connection->peer_devices, peer_device, vnr) {
|
|
struct drbd_device *device = peer_device->device;
|
|
if (test_bit(NEW_CUR_UUID, &device->flags)) {
|
|
drbd_uuid_new_current(device);
|
|
clear_bit(NEW_CUR_UUID, &device->flags);
|
|
}
|
|
}
|
|
rcu_read_unlock();
|
|
spin_lock_irq(&connection->resource->req_lock);
|
|
_tl_restart(connection, CONNECTION_LOST_WHILE_PENDING);
|
|
_conn_request_state(connection,
|
|
(union drbd_state) { { .susp_fen = 1 } },
|
|
(union drbd_state) { { .susp_fen = 0 } },
|
|
CS_VERBOSE);
|
|
spin_unlock_irq(&connection->resource->req_lock);
|
|
}
|
|
}
|
|
kref_put(&connection->kref, drbd_destroy_connection);
|
|
|
|
conn_md_sync(connection);
|
|
|
|
return 0;
|
|
}
|
|
|
|
static void conn_old_common_state(struct drbd_connection *connection, union drbd_state *pcs, enum chg_state_flags *pf)
|
|
{
|
|
enum chg_state_flags flags = ~0;
|
|
struct drbd_peer_device *peer_device;
|
|
int vnr, first_vol = 1;
|
|
union drbd_dev_state os, cs = {
|
|
{ .role = R_SECONDARY,
|
|
.peer = R_UNKNOWN,
|
|
.conn = connection->cstate,
|
|
.disk = D_DISKLESS,
|
|
.pdsk = D_UNKNOWN,
|
|
} };
|
|
|
|
rcu_read_lock();
|
|
idr_for_each_entry(&connection->peer_devices, peer_device, vnr) {
|
|
struct drbd_device *device = peer_device->device;
|
|
os = device->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_connection *connection, 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_peer_device *peer_device;
|
|
int vnr;
|
|
|
|
rcu_read_lock();
|
|
idr_for_each_entry(&connection->peer_devices, peer_device, vnr) {
|
|
struct drbd_device *device = peer_device->device;
|
|
os = drbd_read_state(device);
|
|
ns = sanitize_state(device, os, 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 && !(flags & CS_HARD)) {
|
|
rv = is_valid_state(device, ns);
|
|
if (rv < SS_SUCCESS) {
|
|
if (is_valid_state(device, os) == rv)
|
|
rv = is_valid_soft_transition(os, ns, connection);
|
|
} else
|
|
rv = is_valid_soft_transition(os, ns, connection);
|
|
}
|
|
|
|
if (rv < SS_SUCCESS) {
|
|
if (flags & CS_VERBOSE)
|
|
print_st_err(device, os, ns, rv);
|
|
break;
|
|
}
|
|
}
|
|
rcu_read_unlock();
|
|
|
|
return rv;
|
|
}
|
|
|
|
static void
|
|
conn_set_state(struct drbd_connection *connection, 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,
|
|
.conn = val.conn,
|
|
.disk = D_MASK,
|
|
.pdsk = D_MASK
|
|
} };
|
|
struct drbd_peer_device *peer_device;
|
|
enum drbd_state_rv rv;
|
|
int vnr, number_of_volumes = 0;
|
|
|
|
if (mask.conn == C_MASK) {
|
|
/* remember last connect time so request_timer_fn() won't
|
|
* kill newly established sessions while we are still trying to thaw
|
|
* previously frozen IO */
|
|
if (connection->cstate != C_WF_REPORT_PARAMS && val.conn == C_WF_REPORT_PARAMS)
|
|
connection->last_reconnect_jif = jiffies;
|
|
|
|
connection->cstate = val.conn;
|
|
}
|
|
|
|
rcu_read_lock();
|
|
idr_for_each_entry(&connection->peer_devices, peer_device, vnr) {
|
|
struct drbd_device *device = peer_device->device;
|
|
number_of_volumes++;
|
|
os = drbd_read_state(device);
|
|
ns = apply_mask_val(os, mask, val);
|
|
ns = sanitize_state(device, os, ns, NULL);
|
|
|
|
if (flags & CS_IGN_OUTD_FAIL && ns.disk == D_OUTDATED && os.disk < D_OUTDATED)
|
|
ns.disk = os.disk;
|
|
|
|
rv = _drbd_set_state(device, ns, flags, NULL);
|
|
BUG_ON(rv < SS_SUCCESS);
|
|
ns.i = device->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();
|
|
|
|
if (number_of_volumes == 0) {
|
|
ns_min = ns_max = (union drbd_state) { {
|
|
.role = R_SECONDARY,
|
|
.peer = R_UNKNOWN,
|
|
.conn = val.conn,
|
|
.disk = D_DISKLESS,
|
|
.pdsk = D_UNKNOWN
|
|
} };
|
|
}
|
|
|
|
ns_min.susp = ns_max.susp = connection->resource->susp;
|
|
ns_min.susp_nod = ns_max.susp_nod = connection->resource->susp_nod;
|
|
ns_min.susp_fen = ns_max.susp_fen = connection->resource->susp_fen;
|
|
|
|
*pns_min = ns_min;
|
|
*pns_max = ns_max;
|
|
}
|
|
|
|
static enum drbd_state_rv
|
|
_conn_rq_cond(struct drbd_connection *connection, union drbd_state mask, union drbd_state val)
|
|
{
|
|
enum drbd_state_rv err, rv = SS_UNKNOWN_ERROR; /* continue waiting */;
|
|
|
|
if (test_and_clear_bit(CONN_WD_ST_CHG_OKAY, &connection->flags))
|
|
rv = SS_CW_SUCCESS;
|
|
|
|
if (test_and_clear_bit(CONN_WD_ST_CHG_FAIL, &connection->flags))
|
|
rv = SS_CW_FAILED_BY_PEER;
|
|
|
|
err = conn_is_valid_transition(connection, mask, val, 0);
|
|
if (err == SS_SUCCESS && connection->cstate == C_WF_REPORT_PARAMS)
|
|
return rv;
|
|
|
|
return err;
|
|
}
|
|
|
|
enum drbd_state_rv
|
|
_conn_request_state(struct drbd_connection *connection, 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 = connection->cstate;
|
|
union drbd_state ns_max, ns_min, os;
|
|
bool have_mutex = false;
|
|
struct drbd_state_change *state_change;
|
|
|
|
if (mask.conn) {
|
|
rv = is_valid_conn_transition(oc, val.conn);
|
|
if (rv < SS_SUCCESS)
|
|
goto abort;
|
|
}
|
|
|
|
rv = conn_is_valid_transition(connection, 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))) {
|
|
|
|
/* This will be a cluster-wide state change.
|
|
* Need to give up the spinlock, grab the mutex,
|
|
* then send the state change request, ... */
|
|
spin_unlock_irq(&connection->resource->req_lock);
|
|
mutex_lock(&connection->cstate_mutex);
|
|
have_mutex = true;
|
|
|
|
set_bit(CONN_WD_ST_CHG_REQ, &connection->flags);
|
|
if (conn_send_state_req(connection, mask, val)) {
|
|
/* sending failed. */
|
|
clear_bit(CONN_WD_ST_CHG_REQ, &connection->flags);
|
|
rv = SS_CW_FAILED_BY_PEER;
|
|
/* need to re-aquire the spin lock, though */
|
|
goto abort_unlocked;
|
|
}
|
|
|
|
if (val.conn == C_DISCONNECTING)
|
|
set_bit(DISCONNECT_SENT, &connection->flags);
|
|
|
|
/* ... and re-aquire the spinlock.
|
|
* If _conn_rq_cond() returned >= SS_SUCCESS, we must call
|
|
* conn_set_state() within the same spinlock. */
|
|
spin_lock_irq(&connection->resource->req_lock);
|
|
wait_event_lock_irq(connection->ping_wait,
|
|
(rv = _conn_rq_cond(connection, mask, val)),
|
|
connection->resource->req_lock);
|
|
clear_bit(CONN_WD_ST_CHG_REQ, &connection->flags);
|
|
if (rv < SS_SUCCESS)
|
|
goto abort;
|
|
}
|
|
|
|
state_change = remember_old_state(connection->resource, GFP_ATOMIC);
|
|
conn_old_common_state(connection, &os, &flags);
|
|
flags |= CS_DC_SUSP;
|
|
conn_set_state(connection, mask, val, &ns_min, &ns_max, flags);
|
|
conn_pr_state_change(connection, os, ns_max, flags);
|
|
remember_new_state(state_change);
|
|
|
|
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(&connection->kref);
|
|
acscw->connection = connection;
|
|
acscw->state_change = state_change;
|
|
drbd_queue_work(&connection->sender_work, &acscw->w);
|
|
} else {
|
|
drbd_err(connection, "Could not kmalloc an acscw\n");
|
|
}
|
|
|
|
abort:
|
|
if (have_mutex) {
|
|
/* mutex_unlock() "... must not be used in interrupt context.",
|
|
* so give up the spinlock, then re-aquire it */
|
|
spin_unlock_irq(&connection->resource->req_lock);
|
|
abort_unlocked:
|
|
mutex_unlock(&connection->cstate_mutex);
|
|
spin_lock_irq(&connection->resource->req_lock);
|
|
}
|
|
if (rv < SS_SUCCESS && flags & CS_VERBOSE) {
|
|
drbd_err(connection, "State change failed: %s\n", drbd_set_st_err_str(rv));
|
|
drbd_err(connection, " mask = 0x%x val = 0x%x\n", mask.i, val.i);
|
|
drbd_err(connection, " old_conn:%s wanted_conn:%s\n", drbd_conn_str(oc), drbd_conn_str(val.conn));
|
|
}
|
|
return rv;
|
|
}
|
|
|
|
enum drbd_state_rv
|
|
conn_request_state(struct drbd_connection *connection, union drbd_state mask, union drbd_state val,
|
|
enum chg_state_flags flags)
|
|
{
|
|
enum drbd_state_rv rv;
|
|
|
|
spin_lock_irq(&connection->resource->req_lock);
|
|
rv = _conn_request_state(connection, mask, val, flags);
|
|
spin_unlock_irq(&connection->resource->req_lock);
|
|
|
|
return rv;
|
|
}
|