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2389 lines
73 KiB
2389 lines
73 KiB
// SPDX-License-Identifier: GPL-2.0-or-later |
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/* |
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drbd_state.c |
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|
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This file is part of DRBD by Philipp Reisner and Lars Ellenberg. |
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|
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Copyright (C) 2001-2008, LINBIT Information Technologies GmbH. |
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Copyright (C) 1999-2008, Philipp Reisner <[email protected]>. |
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Copyright (C) 2002-2008, Lars Ellenberg <[email protected]>. |
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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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*/ |
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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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|
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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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|
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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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|
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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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|
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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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|
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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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|
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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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|
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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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|
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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_SECONDARY; |
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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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|
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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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|
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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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{ |
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struct drbd_peer_device *peer_device; |
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int vnr; |
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|
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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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wake_up(&peer_device->device->state_wait); |
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rcu_read_unlock(); |
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|
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} |
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|
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|
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/** |
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* cl_wide_st_chg() - true if the state change is a cluster wide one |
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* @device: DRBD device. |
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* @os: old (current) state. |
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* @ns: new (wanted) state. |
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*/ |
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static int cl_wide_st_chg(struct drbd_device *device, |
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union drbd_state os, union drbd_state ns) |
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{ |
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return (os.conn >= C_CONNECTED && ns.conn >= C_CONNECTED && |
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((os.role != R_PRIMARY && ns.role == R_PRIMARY) || |
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(os.conn != C_STARTING_SYNC_T && ns.conn == C_STARTING_SYNC_T) || |
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(os.conn != C_STARTING_SYNC_S && ns.conn == C_STARTING_SYNC_S) || |
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(os.disk != D_FAILED && ns.disk == D_FAILED))) || |
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(os.conn >= C_CONNECTED && ns.conn == C_DISCONNECTING) || |
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(os.conn == C_CONNECTED && ns.conn == C_VERIFY_S) || |
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(os.conn == C_CONNECTED && ns.conn == C_WF_REPORT_PARAMS); |
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} |
|
|
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static union drbd_state |
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apply_mask_val(union drbd_state os, union drbd_state mask, union drbd_state val) |
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{ |
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union drbd_state ns; |
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ns.i = (os.i & ~mask.i) | val.i; |
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return ns; |
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} |
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|
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enum drbd_state_rv |
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drbd_change_state(struct drbd_device *device, enum chg_state_flags f, |
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union drbd_state mask, union drbd_state val) |
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{ |
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unsigned long flags; |
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union drbd_state ns; |
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enum drbd_state_rv rv; |
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|
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spin_lock_irqsave(&device->resource->req_lock, flags); |
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ns = apply_mask_val(drbd_read_state(device), mask, val); |
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rv = _drbd_set_state(device, ns, f, NULL); |
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spin_unlock_irqrestore(&device->resource->req_lock, flags); |
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|
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return rv; |
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} |
|
|
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/** |
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* drbd_force_state() - Impose a change which happens outside our control on our state |
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* @device: DRBD device. |
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* @mask: mask of state bits to change. |
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* @val: value of new state bits. |
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*/ |
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void drbd_force_state(struct drbd_device *device, |
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union drbd_state mask, union drbd_state val) |
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{ |
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drbd_change_state(device, CS_HARD, mask, val); |
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} |
|
|
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static enum drbd_state_rv |
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_req_st_cond(struct drbd_device *device, union drbd_state mask, |
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union drbd_state val) |
|
{ |
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union drbd_state os, ns; |
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unsigned long flags; |
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enum drbd_state_rv rv; |
|
|
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if (test_and_clear_bit(CL_ST_CHG_SUCCESS, &device->flags)) |
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return SS_CW_SUCCESS; |
|
|
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if (test_and_clear_bit(CL_ST_CHG_FAIL, &device->flags)) |
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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; |
|
void *buffer = NULL; |
|
|
|
init_completion(&done); |
|
|
|
if (f & CS_SERIALIZE) |
|
mutex_lock(device->state_mutex); |
|
if (f & CS_INHIBIT_MD_IO) |
|
buffer = drbd_md_get_buffer(device, __func__); |
|
|
|
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 (buffer) |
|
drbd_md_put_buffer(device); |
|
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; |
|
} |
|
|
|
/* |
|
* We grab drbd_md_get_buffer(), because we don't want to "fail" the disk while |
|
* there is IO in-flight: the transition into D_FAILED for detach purposes |
|
* may get misinterpreted as actual IO error in a confused endio function. |
|
* |
|
* We wrap it all into wait_event(), to retry in case the drbd_req_state() |
|
* returns SS_IN_TRANSIENT_STATE. |
|
* |
|
* To avoid potential deadlock with e.g. the receiver thread trying to grab |
|
* drbd_md_get_buffer() while trying to get out of the "transient state", we |
|
* need to grab and release the meta data buffer inside of that wait_event loop. |
|
*/ |
|
static enum drbd_state_rv |
|
request_detach(struct drbd_device *device) |
|
{ |
|
return drbd_req_state(device, NS(disk, D_FAILED), |
|
CS_VERBOSE | CS_ORDERED | CS_INHIBIT_MD_IO); |
|
} |
|
|
|
int drbd_request_detach_interruptible(struct drbd_device *device) |
|
{ |
|
int ret, rv; |
|
|
|
drbd_suspend_io(device); /* so no-one is stuck in drbd_al_begin_io */ |
|
wait_event_interruptible(device->state_wait, |
|
(rv = request_detach(device)) != SS_IN_TRANSIENT_STATE); |
|
drbd_resume_io(device); |
|
|
|
ret = wait_event_interruptible(device->misc_wait, |
|
device->state.disk != D_FAILED); |
|
|
|
if (rv == SS_IS_DISKLESS) |
|
rv = SS_NOTHING_TO_DO; |
|
if (ret) |
|
rv = ERR_INTR; |
|
|
|
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) |
|
goto out; /* 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; |
|
|
|
out: |
|
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). |
|
* @os: old state. |
|
* @ns: new state. |
|
* @connection: DRBD connection. |
|
*/ |
|
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: placeholder for returned state warning. |
|
* |
|
* 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 state 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 *last_arg = NULL; |
|
|
|
#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 |
|
* @state_change: state change to broadcast |
|
*/ |
|
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); |
|
} |
|
} |
|
conn_md_sync(connection); |
|
kref_put(&connection->kref, drbd_destroy_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; |
|
}
|
|
|