mdmon.h

   1 enum array_state { clear, inactive, suspended, readonly, read_auto,
   2                    clean, active, write_pending, active_idle, bad_word};
   3
   4 enum sync_action { idle, reshape, resync, recover, check, repair, bad_action };
   5
   6
   7 struct active_array {
   8         struct mdinfo info;
   9         struct supertype *container;
  10         struct active_array *next, *replaces;
  11
  12         int action_fd;
  13         int resync_start_fd;
  14         int metadata_fd; /* for monitoring rw/ro status */
  15
  16         enum array_state prev_state, curr_state, next_state;
  17         enum sync_action prev_action, curr_action, next_action;
  18
  19         int check_degraded; /* flag set by mon, read by manage */
  20
  21         int devnum;
  22
  23         unsigned long long resync_start;
  24 };
  25
  26 /*
  27  * Metadata updates are handled by the monitor thread,
  28  * as it has exclusive access to the metadata.
  29  * When the manager want to updates metadata, either
  30  * for it's own reason (e.g. committing a spare) or
  31  * on behalf of mdadm, it creates a metadata_update
  32  * structure and queues it to the monitor.
  33  * Updates are created and processed by code under the
  34  * superswitch.  All common code sees them as opaque
  35  * blobs.
  36  */
  37 extern struct metadata_update *update_queue, *update_queue_handled;
  38
  39 #define MD_MAJOR 9
  40
  41 extern struct active_array *container;
  42 extern struct active_array *discard_this;
  43 extern struct active_array *pending_discard;
  44 extern struct md_generic_cmd *active_cmd;
  45
  46
  47 void remove_pidfile(char *devname);
  48 void do_monitor(struct supertype *container);
  49 void do_manager(struct supertype *container);
  50 int make_control_sock(char *devname);
  51 int make_pidfile(char *devname, int o_excl);
  52 extern int socket_hup_requested;
  53 extern int sigterm;
  54
  55 int read_dev_state(int fd);
  56 int get_resync_start(struct active_array *a);
  57 int is_container_member(struct mdstat_ent *mdstat, char *container);
  58
  59 struct mdstat_ent *mdstat_read(int hold, int start);
  60
  61 extern int exit_now, manager_ready;
  62 extern int mon_tid, mgr_tid;
  63 extern int monitor_loop_cnt;
  64
  65 /* helper routine to determine resync completion since MaxSector is a
  66  * moving target
  67  */
  68 static inline int is_resync_complete(struct active_array *a)
  69 {
  70         if (a->resync_start >= a->info.component_size)
  71                 return 1;
  72         return 0;
  73 }
  74