| /* |
| * mdmon - monitor external metadata arrays |
| * |
| * Copyright (C) 2007-2009 Neil Brown <neilb@suse.de> |
| * Copyright (C) 2007-2009 Intel Corporation |
| * |
| * This program is free software; you can redistribute it and/or modify it |
| * under the terms and conditions of the GNU General Public License, |
| * version 2, as published by the Free Software Foundation. |
| * |
| * This program is distributed in the hope it will be useful, but WITHOUT |
| * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or |
| * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for |
| * more details. |
| * |
| * You should have received a copy of the GNU General Public License along with |
| * this program; if not, write to the Free Software Foundation, Inc., |
| * 51 Franklin St - Fifth Floor, Boston, MA 02110-1301 USA. |
| */ |
| |
| enum array_state { clear, inactive, suspended, readonly, read_auto, |
| clean, active, write_pending, active_idle, bad_word}; |
| |
| enum sync_action { idle, reshape, resync, recover, check, repair, bad_action }; |
| |
| |
| struct active_array { |
| struct mdinfo info; |
| struct supertype *container; |
| struct active_array *next, *replaces; |
| |
| int action_fd; |
| int resync_start_fd; |
| int metadata_fd; /* for monitoring rw/ro status */ |
| |
| enum array_state prev_state, curr_state, next_state; |
| enum sync_action prev_action, curr_action, next_action; |
| |
| int check_degraded; /* flag set by mon, read by manage */ |
| |
| int devnum; |
| |
| unsigned long long resync_start; |
| }; |
| |
| /* |
| * Metadata updates are handled by the monitor thread, |
| * as it has exclusive access to the metadata. |
| * When the manager want to updates metadata, either |
| * for it's own reason (e.g. committing a spare) or |
| * on behalf of mdadm, it creates a metadata_update |
| * structure and queues it to the monitor. |
| * Updates are created and processed by code under the |
| * superswitch. All common code sees them as opaque |
| * blobs. |
| */ |
| extern struct metadata_update *update_queue, *update_queue_handled; |
| |
| #define MD_MAJOR 9 |
| |
| extern struct active_array *container; |
| extern struct active_array *discard_this; |
| extern struct active_array *pending_discard; |
| extern struct md_generic_cmd *active_cmd; |
| |
| |
| void remove_pidfile(char *devname); |
| void do_monitor(struct supertype *container); |
| void do_manager(struct supertype *container); |
| int make_control_sock(char *devname); |
| int make_pidfile(char *devname, int o_excl); |
| extern int socket_hup_requested; |
| extern int sigterm; |
| |
| int read_dev_state(int fd); |
| int get_resync_start(struct active_array *a); |
| int is_container_member(struct mdstat_ent *mdstat, char *container); |
| |
| struct mdstat_ent *mdstat_read(int hold, int start); |
| |
| extern int exit_now, manager_ready; |
| extern int mon_tid, mgr_tid; |
| extern int monitor_loop_cnt; |
| |
| /* helper routine to determine resync completion since MaxSector is a |
| * moving target |
| */ |
| static inline int is_resync_complete(struct active_array *a) |
| { |
| if (a->resync_start >= a->info.component_size) |
| return 1; |
| return 0; |
| } |
| |