Adding upstream version 4.3.upstream/4.3

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>

1 files changed, 111 insertions, 0 deletions

diff --git a/mdmon.h b/mdmon.h
new file mode 100644
index 0000000..b3d72ac
--- /dev/null
+++ b/mdmon.h
@@ -0,0 +1,111 @@
+/*
+ * 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.
+ */
+
+extern const char Name[];
+
+enum array_state { clear, inactive, suspended, readonly, read_auto,
+		   clean, active, write_pending, active_idle, broken, 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 to_remove;
+
+	int action_fd;
+	int resync_start_fd;
+	int metadata_fd; /* for monitoring rw/ro status */
+	int sync_completed_fd; /* for checkpoint notification events */
+	int safe_mode_delay_fd;
+	unsigned long long last_checkpoint; /* sync_completed fires for many
+					     * reasons this field makes sure the
+					     * kernel has made progress before
+					     * moving the checkpoint.  It is
+					     * cleared by the metadata handler
+					     * when it determines recovery is
+					     * terminated.
+					     */
+
+	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 check_reshape; /* flag set by mon, read by manage */
+};
+
+/*
+ * 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);
+extern int sigterm;
+
+int read_dev_state(int fd);
+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 mdinfo *array)
+{
+	unsigned long long sync_size = 0;
+	int ncopies, l;
+	switch(array->array.level) {
+	case 1:
+	case 4:
+	case 5:
+	case 6:
+		sync_size = array->component_size;
+		break;
+	case 10:
+		l = array->array.layout;
+		ncopies = (l & 0xff) * ((l >> 8) & 0xff);
+		sync_size = array->component_size * array->array.raid_disks;
+		sync_size /= ncopies;
+		break;
+	}
+	return array->resync_start >= sync_size;
+}