0f99b4bd73
When mdadm starts a reshape, it might add some devices to the array first. mdmon needs to notice the reshape starting and check for any new devices. If there are any they need to be provided to be monitored. Signed-off-by: NeilBrown <neilb@suse.de>
99 lines
3.1 KiB
C
99 lines
3.1 KiB
C
/*
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* mdmon - monitor external metadata arrays
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*
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* Copyright (C) 2007-2009 Neil Brown <neilb@suse.de>
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* Copyright (C) 2007-2009 Intel Corporation
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*
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* This program is free software; you can redistribute it and/or modify it
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* under the terms and conditions of the GNU General Public License,
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* version 2, as published by the Free Software Foundation.
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*
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* This program is distributed in the hope it will be useful, but WITHOUT
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* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
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* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
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* more details.
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*
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* You should have received a copy of the GNU General Public License along with
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* this program; if not, write to the Free Software Foundation, Inc.,
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* 51 Franklin St - Fifth Floor, Boston, MA 02110-1301 USA.
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*/
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enum array_state { clear, inactive, suspended, readonly, read_auto,
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clean, active, write_pending, active_idle, bad_word};
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enum sync_action { idle, reshape, resync, recover, check, repair, bad_action };
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struct active_array {
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struct mdinfo info;
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struct supertype *container;
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struct active_array *next, *replaces;
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int action_fd;
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int resync_start_fd;
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int metadata_fd; /* for monitoring rw/ro status */
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int sync_completed_fd; /* for checkpoint notification events */
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unsigned long long last_checkpoint; /* sync_completed fires for many
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* reasons this field makes sure the
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* kernel has made progress before
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* moving the checkpoint. It is
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* cleared by the metadata handler
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* when it determines recovery is
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* terminated.
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*/
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enum array_state prev_state, curr_state, next_state;
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enum sync_action prev_action, curr_action, next_action;
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int check_degraded; /* flag set by mon, read by manage */
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int check_reshape; /* flag set by mon, read by manage */
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int devnum;
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};
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/*
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* Metadata updates are handled by the monitor thread,
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* as it has exclusive access to the metadata.
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* When the manager want to updates metadata, either
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* for it's own reason (e.g. committing a spare) or
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* on behalf of mdadm, it creates a metadata_update
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* structure and queues it to the monitor.
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* Updates are created and processed by code under the
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* superswitch. All common code sees them as opaque
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* blobs.
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*/
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extern struct metadata_update *update_queue, *update_queue_handled;
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#define MD_MAJOR 9
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extern struct active_array *container;
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extern struct active_array *discard_this;
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extern struct active_array *pending_discard;
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extern struct md_generic_cmd *active_cmd;
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void remove_pidfile(char *devname);
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void do_monitor(struct supertype *container);
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void do_manager(struct supertype *container);
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extern int sigterm;
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int read_dev_state(int fd);
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int is_container_member(struct mdstat_ent *mdstat, char *container);
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struct mdstat_ent *mdstat_read(int hold, int start);
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extern int exit_now, manager_ready;
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extern int mon_tid, mgr_tid;
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extern int monitor_loop_cnt;
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/* helper routine to determine resync completion since MaxSector is a
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* moving target
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*/
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static inline int is_resync_complete(struct mdinfo *array)
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{
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if (array->resync_start >= array->component_size)
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return 1;
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return 0;
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}
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