]> git.ipfire.org Git - thirdparty/mdadm.git/blame - mdmon.h
Release mdadm-3.3.4
[thirdparty/mdadm.git] / mdmon.h
CommitLineData
a54d5262
DW
1/*
2 * mdmon - monitor external metadata arrays
3 *
e736b623
N
4 * Copyright (C) 2007-2009 Neil Brown <neilb@suse.de>
5 * Copyright (C) 2007-2009 Intel Corporation
a54d5262
DW
6 *
7 * This program is free software; you can redistribute it and/or modify it
8 * under the terms and conditions of the GNU General Public License,
9 * version 2, as published by the Free Software Foundation.
10 *
11 * This program is distributed in the hope it will be useful, but WITHOUT
12 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
13 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
14 * more details.
15 *
16 * You should have received a copy of the GNU General Public License along with
17 * this program; if not, write to the Free Software Foundation, Inc.,
18 * 51 Franklin St - Fifth Floor, Boston, MA 02110-1301 USA.
19 */
20
d56dd607 21extern const char Name[];
a88e119f 22
549e9569
NB
23enum array_state { clear, inactive, suspended, readonly, read_auto,
24 clean, active, write_pending, active_idle, bad_word};
25
26enum sync_action { idle, reshape, resync, recover, check, repair, bad_action };
27
549e9569
NB
28struct active_array {
29 struct mdinfo info;
30 struct supertype *container;
31 struct active_array *next, *replaces;
ba714450 32 int to_remove;
549e9569
NB
33
34 int action_fd;
c052ba30 35 int resync_start_fd;
e9dd1598 36 int metadata_fd; /* for monitoring rw/ro status */
484240d8
DW
37 int sync_completed_fd; /* for checkpoint notification events */
38 unsigned long long last_checkpoint; /* sync_completed fires for many
39 * reasons this field makes sure the
40 * kernel has made progress before
41 * moving the checkpoint. It is
42 * cleared by the metadata handler
43 * when it determines recovery is
44 * terminated.
45 */
549e9569
NB
46
47 enum array_state prev_state, curr_state, next_state;
48 enum sync_action prev_action, curr_action, next_action;
49
6c3fb95c 50 int check_degraded; /* flag set by mon, read by manage */
0f99b4bd 51 int check_reshape; /* flag set by mon, read by manage */
549e9569
NB
52};
53
2e735d19
NB
54/*
55 * Metadata updates are handled by the monitor thread,
56 * as it has exclusive access to the metadata.
57 * When the manager want to updates metadata, either
58 * for it's own reason (e.g. committing a spare) or
59 * on behalf of mdadm, it creates a metadata_update
60 * structure and queues it to the monitor.
61 * Updates are created and processed by code under the
62 * superswitch. All common code sees them as opaque
63 * blobs.
64 */
2e735d19 65extern struct metadata_update *update_queue, *update_queue_handled;
549e9569
NB
66
67#define MD_MAJOR 9
68
69extern struct active_array *container;
549e9569
NB
70extern struct active_array *discard_this;
71extern struct active_array *pending_discard;
3e70c845 72extern struct md_generic_cmd *active_cmd;
549e9569 73
e0d6609f 74void remove_pidfile(char *devname);
549e9569
NB
75void do_monitor(struct supertype *container);
76void do_manager(struct supertype *container);
6144ed44 77extern int sigterm;
549e9569
NB
78
79int read_dev_state(int fd);
883a6142 80int is_container_member(struct mdstat_ent *mdstat, char *container);
549e9569
NB
81
82struct mdstat_ent *mdstat_read(int hold, int start);
83
e0d6609f 84extern int exit_now, manager_ready;
4d43913c 85extern int mon_tid, mgr_tid;
1eb252b8 86extern int monitor_loop_cnt;
593add1b
DW
87
88/* helper routine to determine resync completion since MaxSector is a
89 * moving target
90 */
b7941fd6 91static inline int is_resync_complete(struct mdinfo *array)
593add1b 92{
71d68ff6
N
93 unsigned long long sync_size = 0;
94 int ncopies, l;
95 switch(array->array.level) {
96 case 1:
97 case 4:
98 case 5:
99 case 6:
100 sync_size = array->component_size;
101 break;
102 case 10:
103 l = array->array.layout;
104 ncopies = (l & 0xff) * ((l >> 8) && 0xff);
105 sync_size = array->component_size * array->array.raid_disks;
106 sync_size /= ncopies;
107 break;
108 }
109 return array->resync_start >= sync_size;
593add1b 110}