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// Copyright 2018 The Prometheus Authors
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
// http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.
package nfs
import (
"bufio"
"fmt"
"io"
"strings"
"github.com/prometheus/procfs/internal/util"
)
// ParseServerRPCStats returns stats read from /proc/net/rpc/nfsd.
func ParseServerRPCStats(r io.Reader) (*ServerRPCStats, error) {
stats := &ServerRPCStats{}
scanner := bufio.NewScanner(r)
for scanner.Scan() {
line := scanner.Text()
parts := strings.Fields(scanner.Text())
// require at least <key> <value>
if len(parts) < 2 {
return nil, fmt.Errorf("invalid NFSd metric line %q", line)
}
label := parts[0]
var values []uint64
var err error
if label == "th" {
if len(parts) < 3 {
return nil, fmt.Errorf("invalid NFSd th metric line %q", line)
}
values, err = util.ParseUint64s(parts[1:3])
} else {
values, err = util.ParseUint64s(parts[1:])
}
if err != nil {
return nil, fmt.Errorf("error parsing NFSd metric line: %w", err)
}
switch metricLine := parts[0]; metricLine {
case "rc":
stats.ReplyCache, err = parseReplyCache(values)
case "fh":
stats.FileHandles, err = parseFileHandles(values)
case "io":
stats.InputOutput, err = parseInputOutput(values)
case "th":
stats.Threads, err = parseThreads(values)
case "ra":
stats.ReadAheadCache, err = parseReadAheadCache(values)
case "net":
stats.Network, err = parseNetwork(values)
case "rpc":
stats.ServerRPC, err = parseServerRPC(values)
case "proc2":
stats.V2Stats, err = parseV2Stats(values)
case "proc3":
stats.V3Stats, err = parseV3Stats(values)
case "proc4":
stats.ServerV4Stats, err = parseServerV4Stats(values)
case "proc4ops":
stats.V4Ops, err = parseV4Ops(values)
case "wdeleg_getattr":
stats.WdelegGetattr = values[0]
default:
return nil, fmt.Errorf("unknown NFSd metric line %q", metricLine)
}
if err != nil {
return nil, fmt.Errorf("errors parsing NFSd metric line: %w", err)
}
}
if err := scanner.Err(); err != nil {
return nil, fmt.Errorf("error scanning NFSd file: %w", err)
}
return stats, nil
}