Rework pruning to report reclaimed space

This change adds code to report the reclaimed space after a prune.
Reclaimed space from volumes, images, and containers is recorded
during the prune call in a PruneReport struct. These structs are
collected into a slice during a system prune and processed afterwards
to calculate the total reclaimed space.

Closes #8658

Signed-off-by: Baron Lenardson <lenardson.baron@gmail.com>

1 files changed, 6 insertions, 4 deletions

diff --git a/pkg/api/handlers/compat/images.go b/pkg/api/handlers/compat/images.go
index dc72500e4..9d7503aba 100644
--- a/pkg/api/handlers/compat/images.go
+++ b/pkg/api/handlers/compat/images.go
@@ -99,21 +99,23 @@ func PruneImages(w http.ResponseWriter, r *http.Request) {
 			filters = append(filters, fmt.Sprintf("%s=%s", k, val))
 		}
 	}
-	pruneCids, err := runtime.ImageRuntime().PruneImages(r.Context(), query.All, filters)
+	imagePruneReports, err := runtime.ImageRuntime().PruneImages(r.Context(), query.All, filters)
 	if err != nil {
 		utils.InternalServerError(w, err)
 		return
 	}
-	for _, p := range pruneCids {
+	reclaimedSpace := uint64(0)
+	for _, p := range imagePruneReports {
 		idr = append(idr, types.ImageDeleteResponseItem{
-			Deleted: p,
+			Deleted: p.Id,
 		})
+		reclaimedSpace = reclaimedSpace + p.Size
 	}
 
 	// FIXME/TODO to do this exactly correct, pruneimages needs to return idrs and space-reclaimed, then we are golden
 	ipr := types.ImagesPruneReport{
 		ImagesDeleted:  idr,
-		SpaceReclaimed: 1, // TODO we cannot supply this right now
+		SpaceReclaimed: reclaimedSpace,
 	}
 	utils.WriteResponse(w, http.StatusOK, handlers.ImagesPruneReport{ImagesPruneReport: ipr})
 }