Display status percentage.

Display percentage of space usage for shared snapshots. Display 'I' and 'S'
for invalidated snapshots.

Signed-off-by: Mikulas Patocka <mpatocka@redhat.com>

---
 lib/activate/dev_manager.c        |    3 ++-
 lib/multisnapshot/multisnapshot.c |   28 ++++++++++++++++++++++++++--
 lib/report/report.c               |   22 ++++++++++++++++++++--
 3 files changed, 48 insertions(+), 5 deletions(-)

Index: LVM2.2.02.73/lib/activate/dev_manager.c
===================================================================
--- LVM2.2.02.73.orig/lib/activate/dev_manager.c	2010-09-10 18:54:49.000000000 +0200
+++ LVM2.2.02.73/lib/activate/dev_manager.c	2010-09-10 18:54:58.000000000 +0200
@@ -704,7 +704,8 @@ int dev_manager_snapshot_percent(struct 
 	 * Try and get some info on this device.
 	 */
 	log_debug("Getting device status percentage for %s", name);
-	if (!(_percent(dm, name, dlid, "snapshot", 0, NULL, percent,
+	if (!(_percent(dm, name, dlid, lv_is_multisnap_origin(lv) ?
+		       "multisnapshot" :  "snapshot", 0, NULL, percent,
 		       percent_range, NULL, fail_if_percent_unsupported)))
 		return_0;
 
Index: LVM2.2.02.73/lib/multisnapshot/multisnapshot.c
===================================================================
--- LVM2.2.02.73.orig/lib/multisnapshot/multisnapshot.c	2010-09-10 18:54:39.000000000 +0200
+++ LVM2.2.02.73/lib/multisnapshot/multisnapshot.c	2010-09-10 18:54:58.000000000 +0200
@@ -168,8 +168,32 @@ static int _multisnapshot_target_percent
 			char *params, uint64_t *total_numerator,
 			uint64_t *total_denominator)
 {
-	*percent_range = PERCENT_INVALID;
-	return 0;
+	int m;
+	unsigned nargs;
+	int error;
+	char *snapid;
+	uint64_t total, allocated, metadata;
+
+	snapid = dm_pool_alloc(mem, strlen(params) + 1);
+	if (!snapid) {
+		log_error("Out of memory.");
+		return 0;
+	}
+
+	m = sscanf(params, "%u %d %s %"SCNu64" %"SCNu64" %"SCNu64"", &nargs, &error, snapid, &total, &allocated, &metadata);
+	if (m != 6) {
+		log_error("_multisnapshot_target_percent: matched only %d entries of '%s'", m, params);
+		return 0;
+	}
+	if (error < 0) {
+		*percent_range = PERCENT_INVALID;
+		return 1;
+	}
+
+	*percent_range = allocated == metadata ? PERCENT_0 : allocated == total ? PERCENT_100 : PERCENT_0_TO_100;
+	*total_numerator += allocated;
+	*total_denominator += total;
+	return 1;
 }
 
 static int _multisnap_target_present(struct cmd_context *cmd,
Index: LVM2.2.02.73/lib/report/report.c
===================================================================
--- LVM2.2.02.73.orig/lib/report/report.c	2010-09-10 18:54:52.000000000 +0200
+++ LVM2.2.02.73/lib/report/report.c	2010-09-10 18:59:13.000000000 +0200
@@ -383,6 +383,18 @@ static int _lvstatus_disp(struct dm_repo
 		repstr[5] = '-';
 	}
 
+	if (lv_is_cow(lv) && lv->snapshot->status & SNAPSHOT_SHARED)
+		lv = lv->snapshot->origin;
+	else if (lv_is_multisnap_cow(lv))
+		lv = first_seg(lv)->origin;
+	else
+		lv = NULL;
+
+	if (lv && lv_snapshot_percent(lv, &snap_percent, &percent_range) && percent_range == PERCENT_INVALID) {
+		repstr[0] = toupper(repstr[0]);
+		repstr[4] = 'I';
+	}
+
 out:
 	dm_report_field_set_value(field, repstr, NULL);
 	return 1;
@@ -1091,13 +1103,19 @@ static int _snpercent_disp(struct dm_rep
 		return 0;
 	}
 
-	if ((!lv_is_cow(lv) && !lv_is_merging_origin(lv)) ||
-	    !lv_info(lv->vg->cmd, lv, 0, &info, 0, 0) || !info.exists) {
+	if ((!lv_is_cow(lv) && !lv_is_merging_origin(lv))) {
+report_empty:
 		*sortval = UINT64_C(0);
 		dm_report_field_set_value(field, "", sortval);
 		return 1;
 	}
 
+	if (lv->snapshot->status & SNAPSHOT_SHARED)
+		lv = lv->snapshot->origin;
+
+	if (!lv_info(lv->vg->cmd, lv, 0, &info, 0, 0) || !info.exists)
+		goto report_empty;
+
 	if (!lv_snapshot_percent(lv, &snap_percent, &percent_range) ||
 				 (percent_range == PERCENT_INVALID)) {
 		if (!lv_is_merging_origin(lv)) {