]>
Commit | Line | Data |
---|---|---|
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 | ||
549e9569 NB |
21 | enum array_state { clear, inactive, suspended, readonly, read_auto, |
22 | clean, active, write_pending, active_idle, bad_word}; | |
23 | ||
24 | enum sync_action { idle, reshape, resync, recover, check, repair, bad_action }; | |
25 | ||
26 | ||
27 | struct active_array { | |
28 | struct mdinfo info; | |
29 | struct supertype *container; | |
30 | struct active_array *next, *replaces; | |
31 | ||
32 | int action_fd; | |
c052ba30 | 33 | int resync_start_fd; |
e9dd1598 | 34 | int metadata_fd; /* for monitoring rw/ro status */ |
549e9569 NB |
35 | |
36 | enum array_state prev_state, curr_state, next_state; | |
37 | enum sync_action prev_action, curr_action, next_action; | |
38 | ||
6c3fb95c NB |
39 | int check_degraded; /* flag set by mon, read by manage */ |
40 | ||
549e9569 | 41 | int devnum; |
549e9569 NB |
42 | }; |
43 | ||
2e735d19 NB |
44 | /* |
45 | * Metadata updates are handled by the monitor thread, | |
46 | * as it has exclusive access to the metadata. | |
47 | * When the manager want to updates metadata, either | |
48 | * for it's own reason (e.g. committing a spare) or | |
49 | * on behalf of mdadm, it creates a metadata_update | |
50 | * structure and queues it to the monitor. | |
51 | * Updates are created and processed by code under the | |
52 | * superswitch. All common code sees them as opaque | |
53 | * blobs. | |
54 | */ | |
2e735d19 | 55 | extern struct metadata_update *update_queue, *update_queue_handled; |
549e9569 NB |
56 | |
57 | #define MD_MAJOR 9 | |
58 | ||
59 | extern struct active_array *container; | |
549e9569 NB |
60 | extern struct active_array *discard_this; |
61 | extern struct active_array *pending_discard; | |
3e70c845 | 62 | extern struct md_generic_cmd *active_cmd; |
549e9569 NB |
63 | |
64 | ||
e0d6609f | 65 | void remove_pidfile(char *devname); |
549e9569 NB |
66 | void do_monitor(struct supertype *container); |
67 | void do_manager(struct supertype *container); | |
6144ed44 | 68 | extern int sigterm; |
549e9569 NB |
69 | |
70 | int read_dev_state(int fd); | |
883a6142 | 71 | int is_container_member(struct mdstat_ent *mdstat, char *container); |
549e9569 NB |
72 | |
73 | struct mdstat_ent *mdstat_read(int hold, int start); | |
74 | ||
e0d6609f | 75 | extern int exit_now, manager_ready; |
4d43913c | 76 | extern int mon_tid, mgr_tid; |
1eb252b8 | 77 | extern int monitor_loop_cnt; |
593add1b DW |
78 | |
79 | /* helper routine to determine resync completion since MaxSector is a | |
80 | * moving target | |
81 | */ | |
b7941fd6 | 82 | static inline int is_resync_complete(struct mdinfo *array) |
593add1b | 83 | { |
b7941fd6 | 84 | if (array->resync_start >= array->component_size) |
593add1b DW |
85 | return 1; |
86 | return 0; | |
87 | } | |
88 |