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// Copyright 2020 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.
//go:build linux
// +build linux
package sysfs
import (
"errors"
"fmt"
"os"
"path/filepath"
"github.com/prometheus/procfs/internal/util"
)
const fibrechannelClassPath = "class/fc_host"
type FibreChannelCounters struct {
DumpedFrames uint64 // /sys/class/fc_host/<Name>/statistics/dumped_frames
ErrorFrames uint64 // /sys/class/fc_host/<Name>/statistics/error_frames
InvalidCRCCount uint64 // /sys/class/fc_host/<Name>/statistics/invalid_crc_count
RXFrames uint64 // /sys/class/fc_host/<Name>/statistics/rx_frames
RXWords uint64 // /sys/class/fc_host/<Name>/statistics/rx_words
TXFrames uint64 // /sys/class/fc_host/<Name>/statistics/tx_frames
TXWords uint64 // /sys/class/fc_host/<Name>/statistics/tx_words
SecondsSinceLastReset uint64 // /sys/class/fc_host/<Name>/statistics/seconds_since_last_reset
InvalidTXWordCount uint64 // /sys/class/fc_host/<Name>/statistics/invalid_tx_word_count
LinkFailureCount uint64 // /sys/class/fc_host/<Name>/statistics/link_failure_count
LossOfSyncCount uint64 // /sys/class/fc_host/<Name>/statistics/loss_of_sync_count
LossOfSignalCount uint64 // /sys/class/fc_host/<Name>/statistics/loss_of_signal_count
NosCount uint64 // /sys/class/fc_host/<Name>/statistics/nos_count
FCPPacketAborts uint64 // / sys/class/fc_host/<Name>/statistics/fcp_packet_aborts
}
type FibreChannelHost struct {
Name string // /sys/class/fc_host/<Name>
Speed string // /sys/class/fc_host/<Name>/speed
PortState string // /sys/class/fc_host/<Name>/port_state
PortType string // /sys/class/fc_host/<Name>/port_type
SymbolicName string // /sys/class/fc_host/<Name>/symbolic_name
NodeName string // /sys/class/fc_host/<Name>/node_name
PortID string // /sys/class/fc_host/<Name>/port_id
PortName string // /sys/class/fc_host/<Name>/port_name
FabricName string // /sys/class/fc_host/<Name>/fabric_name
DevLossTMO string // /sys/class/fc_host/<Name>/dev_loss_tmo
SupportedClasses string // /sys/class/fc_host/<Name>/supported_classes
SupportedSpeeds string // /sys/class/fc_host/<Name>/supported_speeds
Counters FibreChannelCounters // /sys/class/fc_host/<Name>/statistics/*
}
type FibreChannelClass map[string]FibreChannelHost
// FibreChannelClass parses everything in /sys/class/fc_host.
func (fs FS) FibreChannelClass() (FibreChannelClass, error) {
path := fs.sys.Path(fibrechannelClassPath)
dirs, err := os.ReadDir(path)
if err != nil {
return nil, err
}
fcc := make(FibreChannelClass, len(dirs))
for _, d := range dirs {
host, err := fs.parseFibreChannelHost(d.Name())
if err != nil {
return nil, err
}
fcc[host.Name] = *host
}
return fcc, nil
}
// Parse a single FC host.
func (fs FS) parseFibreChannelHost(name string) (*FibreChannelHost, error) {
path := fs.sys.Path(fibrechannelClassPath, name)
host := FibreChannelHost{Name: name}
for _, f := range [...]string{"speed", "port_state", "port_type", "node_name", "port_id", "port_name", "fabric_name", "dev_loss_tmo", "symbolic_name", "supported_classes", "supported_speeds"} {
name := filepath.Join(path, f)
value, err := util.SysReadFile(name)
if err != nil {
return nil, fmt.Errorf("failed to read file %q: %w", name, err)
}
switch f {
case "speed":
host.Speed = value
case "port_state":
host.PortState = value
case "port_type":
host.PortType = value
case "node_name":
if len(value) > 2 {
value = value[2:]
}
host.NodeName = value
case "port_id":
if len(value) > 2 {
value = value[2:]
}
host.PortID = value
case "port_name":
if len(value) > 2 {
value = value[2:]
}
host.PortName = value
case "fabric_name":
if len(value) > 2 {
value = value[2:]
}
host.FabricName = value
case "dev_loss_tmo":
host.DevLossTMO = value
case "supported_classes":
host.SupportedClasses = value
case "supported_speeds":
host.SupportedSpeeds = value
case "symbolic_name":
host.SymbolicName = value
}
}
counters, err := parseFibreChannelStatistics(path)
if err != nil {
return nil, err
}
host.Counters = *counters
return &host, nil
}
// parseFibreChannelStatistics parses metrics from a single FC host.
func parseFibreChannelStatistics(hostPath string) (*FibreChannelCounters, error) {
var counters FibreChannelCounters
path := filepath.Join(hostPath, "statistics")
files, err := os.ReadDir(path)
if err != nil {
return nil, err
}
for _, f := range files {
if !f.Type().IsRegular() || f.Name() == "reset_statistics" {
continue
}
name := filepath.Join(path, f.Name())
value, err := util.SysReadFile(name)
if err != nil {
// there are some write-only files in this directory; we can safely skip over them
if os.IsNotExist(err) || err.Error() == "operation not supported" || errors.Is(err, os.ErrInvalid) {
continue
}
return nil, fmt.Errorf("failed to read file %q: %w", name, err)
}
vp := util.NewValueParser(value)
// Below switch was automatically generated. Don't need everything in there yet, so the unwanted bits are commented out.
switch f.Name() {
case "dumped_frames":
counters.DumpedFrames = *vp.PUInt64()
case "error_frames":
counters.ErrorFrames = *vp.PUInt64()
/*
case "fc_no_free_exch":
counters.FcNoFreeExch = *vp.PUInt64()
case "fc_no_free_exch_xid":
counters.FcNoFreeExchXid = *vp.PUInt64()
case "fc_non_bls_resp":
counters.FcNonBlsResp = *vp.PUInt64()
case "fc_seq_not_found":
counters.FcSeqNotFound = *vp.PUInt64()
case "fc_xid_busy":
counters.FcXidBusy = *vp.PUInt64()
case "fc_xid_not_found":
counters.FcXidNotFound = *vp.PUInt64()
case "fcp_control_requests":
counters.FcpControlRequests = *vp.PUInt64()
case "fcp_frame_alloc_failures":
counters.FcpFrameAllocFailures = *vp.PUInt64()
case "fcp_input_megabytes":
counters.FcpInputMegabytes = *vp.PUInt64()
case "fcp_input_requests":
counters.FcpInputRequests = *vp.PUInt64()
case "fcp_output_megabytes":
counters.FcpOutputMegabytes = *vp.PUInt64()
case "fcp_output_requests":
counters.FcpOutputRequests = *vp.PUInt64()
*/
case "fcp_packet_aborts":
counters.FCPPacketAborts = *vp.PUInt64()
/*
case "fcp_packet_alloc_failures":
counters.FcpPacketAllocFailures = *vp.PUInt64()
*/
case "invalid_tx_word_count":
counters.InvalidTXWordCount = *vp.PUInt64()
case "invalid_crc_count":
counters.InvalidCRCCount = *vp.PUInt64()
case "link_failure_count":
counters.LinkFailureCount = *vp.PUInt64()
/*
case "lip_count":
counters.LipCount = *vp.PUInt64()
*/
case "loss_of_signal_count":
counters.LossOfSignalCount = *vp.PUInt64()
case "loss_of_sync_count":
counters.LossOfSyncCount = *vp.PUInt64()
case "nos_count":
counters.NosCount = *vp.PUInt64()
/*
case "prim_seq_protocol_err_count":
counters.PrimSeqProtocolErrCount = *vp.PUInt64()
*/
case "rx_frames":
counters.RXFrames = *vp.PUInt64()
case "rx_words":
counters.RXWords = *vp.PUInt64()
case "seconds_since_last_reset":
counters.SecondsSinceLastReset = *vp.PUInt64()
case "tx_frames":
counters.TXFrames = *vp.PUInt64()
case "tx_words":
counters.TXWords = *vp.PUInt64()
}
if err := vp.Err(); err != nil {
return nil, err
}
}
return &counters, nil
}
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