commonmetrics

const (
	// OperationLatencyKeyMilliseconds is the key for soci operation latency metrics in milliseconds.
	OperationLatencyKeyMilliseconds = "operation_duration_milliseconds"

	// OperationLatencyKeyMicroseconds is the key for soci operation latency metrics in microseconds.
	OperationLatencyKeyMicroseconds = "operation_duration_microseconds"

	// OperationCountKey is the key for soci operation count metrics.
	OperationCountKey = "operation_count"

	// BytesServedKey is the key for any metric related to counting bytes served as the part of specific operation.
	BytesServedKey = "bytes_served"

	// ImageOperationCountKey is the key for any metric related to operation count metric at the image level (as opposed to layer).
	ImageOperationCountKey = "image_operation_count_key"
)

const (
	// prometheus metrics
	Mount             = "mount"
	RemoteRegistryGet = "remote_registry_get"
	NodeReaddir       = "node_readdir"
	InitMetadataStore = "init_metadata_store"
	SynchronousRead   = "synchronous_read"
	BackgroundFetch   = "background_fetch"

	SynchronousReadCount              = "synchronous_read_count"
	SynchronousReadRegistryFetchCount = "synchronous_read_remote_registry_fetch_count" // TODO revisit (wrong place)
	SynchronousBytesServed            = "synchronous_bytes_served"

	// Global fuse failure state
	FuseFailureState = "fuse_failure_state"

	// fuse operation failure metrics
	FuseNodeGetattrFailureCount     = "fuse_node_getattr_failure_count"
	FuseNodeListxattrFailureCount   = "fuse_node_listxattr_failure_count"
	FuseNodeLookupFailureCount      = "fuse_node_lookup_failure_count"
	FuseNodeOpenFailureCount        = "fuse_node_open_failure_count"
	FuseNodeReaddirFailureCount     = "fuse_node_readdir_failure_count"
	FuseFileReadFailureCount        = "fuse_file_read_failure_count"
	FuseFileGetattrFailureCount     = "fuse_file_getattr_failure_count"
	FuseWhiteoutGetattrFailureCount = "fuse_whiteout_getattr_failure_count"
	FuseUnknownFailureCount         = "fuse_unknown_operation_failure_count"

	// TODO this metric is not available now. This needs to go down to BlobReader where the actuall http call is issued
	SynchronousBytesFetched = "synchronous_bytes_fetched"

	// Number of times the snapshotter falls back to use a normal overlay mount instead of mounting the layer as a FUSE mount.
	// Note that a layer not having a ztoc is NOT classified as an error, even though `fs.Mount` returns an error in that case.
	FuseMountFailureCount = "fuse_mount_failure_count"

	// Number of errors of span fetch by background fetcher
	BackgroundSpanFetchFailureCount = "background_span_fetch_failure_count"

	// Number of spans fetched by background fetcher
	BackgroundSpanFetchCount = "background_span_fetch_count"

	// Number of items in the work queue of background fetcher
	BackgroundFetchWorkQueueSize = "background_fetch_work_queue_size"
)