dm.c (115485e83f497fdf9b4bf779038cfe4e141292a9) dm.c (1d3aa6f683b1c1a813a63339d7309cff58ba4531)
1/*
2 * Copyright (C) 2001, 2002 Sistina Software (UK) Limited.
3 * Copyright (C) 2004-2008 Red Hat, Inc. All rights reserved.
4 *
5 * This file is released under the GPL.
6 */
7
8#include "dm.h"

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116#define DMF_FROZEN 2
117#define DMF_FREEING 3
118#define DMF_DELETING 4
119#define DMF_NOFLUSH_SUSPENDING 5
120#define DMF_DEFERRED_REMOVE 6
121#define DMF_SUSPENDED_INTERNALLY 7
122
123/*
1/*
2 * Copyright (C) 2001, 2002 Sistina Software (UK) Limited.
3 * Copyright (C) 2004-2008 Red Hat, Inc. All rights reserved.
4 *
5 * This file is released under the GPL.
6 */
7
8#include "dm.h"

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116#define DMF_FROZEN 2
117#define DMF_FREEING 3
118#define DMF_DELETING 4
119#define DMF_NOFLUSH_SUSPENDING 5
120#define DMF_DEFERRED_REMOVE 6
121#define DMF_SUSPENDED_INTERNALLY 7
122
123/*
124 * A dummy definition to make RCU happy.
125 * struct dm_table should never be dereferenced in this file.
126 */
127struct dm_table {
128 int undefined__;
129};
130
131/*
132 * Work processed by per-device workqueue.
133 */
134struct mapped_device {
135 struct srcu_struct io_barrier;
136 struct mutex suspend_lock;
137 atomic_t holders;
138 atomic_t open_count;
139
140 /*
124 * Work processed by per-device workqueue.
125 */
126struct mapped_device {
127 struct srcu_struct io_barrier;
128 struct mutex suspend_lock;
129 atomic_t holders;
130 atomic_t open_count;
131
132 /*
141 * The current mapping.
133 * The current mapping (struct dm_table *).
142 * Use dm_get_live_table{_fast} or take suspend_lock for
143 * dereference.
144 */
134 * Use dm_get_live_table{_fast} or take suspend_lock for
135 * dereference.
136 */
145 struct dm_table __rcu *map;
137 void __rcu *map;
146
147 struct list_head table_devices;
148 struct mutex table_devices_lock;
149
150 unsigned long flags;
151
152 struct request_queue *queue;
153 int numa_node_id;

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2557 * - used to optimize both dm_request_fn and dm_mq_queue_rq
2558 */
2559 md->immutable_target = dm_table_get_immutable_target(t);
2560 }
2561
2562 __bind_mempools(md, t);
2563
2564 old_map = rcu_dereference_protected(md->map, lockdep_is_held(&md->suspend_lock));
138
139 struct list_head table_devices;
140 struct mutex table_devices_lock;
141
142 unsigned long flags;
143
144 struct request_queue *queue;
145 int numa_node_id;

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2549 * - used to optimize both dm_request_fn and dm_mq_queue_rq
2550 */
2551 md->immutable_target = dm_table_get_immutable_target(t);
2552 }
2553
2554 __bind_mempools(md, t);
2555
2556 old_map = rcu_dereference_protected(md->map, lockdep_is_held(&md->suspend_lock));
2565 rcu_assign_pointer(md->map, t);
2557 rcu_assign_pointer(md->map, (void *)t);
2566 md->immutable_target_type = dm_table_get_immutable_target_type(t);
2567
2568 dm_table_set_restrictions(t, q, limits);
2569 if (old_map)
2570 dm_sync_table(md);
2571
2572 return old_map;
2573}

--- 1183 unchanged lines hidden --- 		2558 md->immutable_target_type = dm_table_get_immutable_target_type(t);
2559
2560 dm_table_set_restrictions(t, q, limits);
2561 if (old_map)
2562 dm_sync_table(md);
2563
2564 return old_map;
2565}

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