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216 lines
6.6 KiB
216 lines
6.6 KiB
// Copyright 2018 The Prometheus Authors |
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// Licensed under the Apache License, Version 2.0 (the "License"); |
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// you may not use this file except in compliance with the License. |
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// You may obtain a copy of the License at |
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// |
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// http://www.apache.org/licenses/LICENSE-2.0 |
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// |
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// Unless required by applicable law or agreed to in writing, software |
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// distributed under the License is distributed on an "AS IS" BASIS, |
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// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
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// See the License for the specific language governing permissions and |
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// limitations under the License. |
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package procfs |
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import ( |
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"bufio" |
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"errors" |
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"os" |
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"sort" |
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"strconv" |
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"strings" |
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) |
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// NetDevLine is single line parsed from /proc/net/dev or /proc/[pid]/net/dev. |
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type NetDevLine struct { |
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Name string `json:"name"` // The name of the interface. |
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RxBytes uint64 `json:"rx_bytes"` // Cumulative count of bytes received. |
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RxPackets uint64 `json:"rx_packets"` // Cumulative count of packets received. |
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RxErrors uint64 `json:"rx_errors"` // Cumulative count of receive errors encountered. |
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RxDropped uint64 `json:"rx_dropped"` // Cumulative count of packets dropped while receiving. |
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RxFIFO uint64 `json:"rx_fifo"` // Cumulative count of FIFO buffer errors. |
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RxFrame uint64 `json:"rx_frame"` // Cumulative count of packet framing errors. |
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RxCompressed uint64 `json:"rx_compressed"` // Cumulative count of compressed packets received by the device driver. |
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RxMulticast uint64 `json:"rx_multicast"` // Cumulative count of multicast frames received by the device driver. |
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TxBytes uint64 `json:"tx_bytes"` // Cumulative count of bytes transmitted. |
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TxPackets uint64 `json:"tx_packets"` // Cumulative count of packets transmitted. |
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TxErrors uint64 `json:"tx_errors"` // Cumulative count of transmit errors encountered. |
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TxDropped uint64 `json:"tx_dropped"` // Cumulative count of packets dropped while transmitting. |
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TxFIFO uint64 `json:"tx_fifo"` // Cumulative count of FIFO buffer errors. |
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TxCollisions uint64 `json:"tx_collisions"` // Cumulative count of collisions detected on the interface. |
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TxCarrier uint64 `json:"tx_carrier"` // Cumulative count of carrier losses detected by the device driver. |
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TxCompressed uint64 `json:"tx_compressed"` // Cumulative count of compressed packets transmitted by the device driver. |
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} |
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// NetDev is parsed from /proc/net/dev or /proc/[pid]/net/dev. The map keys |
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// are interface names. |
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type NetDev map[string]NetDevLine |
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// NewNetDev returns kernel/system statistics read from /proc/net/dev. |
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func NewNetDev() (NetDev, error) { |
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fs, err := NewFS(DefaultMountPoint) |
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if err != nil { |
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return nil, err |
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} |
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return fs.NewNetDev() |
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} |
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// NewNetDev returns kernel/system statistics read from /proc/net/dev. |
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func (fs FS) NewNetDev() (NetDev, error) { |
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return newNetDev(fs.Path("net/dev")) |
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} |
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// NewNetDev returns kernel/system statistics read from /proc/[pid]/net/dev. |
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func (p Proc) NewNetDev() (NetDev, error) { |
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return newNetDev(p.path("net/dev")) |
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} |
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// newNetDev creates a new NetDev from the contents of the given file. |
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func newNetDev(file string) (NetDev, error) { |
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f, err := os.Open(file) |
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if err != nil { |
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return NetDev{}, err |
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} |
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defer f.Close() |
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nd := NetDev{} |
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s := bufio.NewScanner(f) |
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for n := 0; s.Scan(); n++ { |
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// Skip the 2 header lines. |
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if n < 2 { |
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continue |
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} |
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line, err := nd.parseLine(s.Text()) |
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if err != nil { |
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return nd, err |
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} |
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nd[line.Name] = *line |
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} |
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return nd, s.Err() |
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} |
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// parseLine parses a single line from the /proc/net/dev file. Header lines |
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// must be filtered prior to calling this method. |
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func (nd NetDev) parseLine(rawLine string) (*NetDevLine, error) { |
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parts := strings.SplitN(rawLine, ":", 2) |
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if len(parts) != 2 { |
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return nil, errors.New("invalid net/dev line, missing colon") |
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} |
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fields := strings.Fields(strings.TrimSpace(parts[1])) |
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var err error |
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line := &NetDevLine{} |
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// Interface Name |
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line.Name = strings.TrimSpace(parts[0]) |
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if line.Name == "" { |
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return nil, errors.New("invalid net/dev line, empty interface name") |
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} |
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// RX |
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line.RxBytes, err = strconv.ParseUint(fields[0], 10, 64) |
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if err != nil { |
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return nil, err |
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} |
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line.RxPackets, err = strconv.ParseUint(fields[1], 10, 64) |
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if err != nil { |
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return nil, err |
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} |
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line.RxErrors, err = strconv.ParseUint(fields[2], 10, 64) |
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if err != nil { |
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return nil, err |
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} |
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line.RxDropped, err = strconv.ParseUint(fields[3], 10, 64) |
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if err != nil { |
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return nil, err |
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} |
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line.RxFIFO, err = strconv.ParseUint(fields[4], 10, 64) |
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if err != nil { |
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return nil, err |
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} |
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line.RxFrame, err = strconv.ParseUint(fields[5], 10, 64) |
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if err != nil { |
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return nil, err |
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} |
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line.RxCompressed, err = strconv.ParseUint(fields[6], 10, 64) |
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if err != nil { |
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return nil, err |
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} |
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line.RxMulticast, err = strconv.ParseUint(fields[7], 10, 64) |
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if err != nil { |
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return nil, err |
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} |
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// TX |
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line.TxBytes, err = strconv.ParseUint(fields[8], 10, 64) |
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if err != nil { |
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return nil, err |
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} |
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line.TxPackets, err = strconv.ParseUint(fields[9], 10, 64) |
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if err != nil { |
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return nil, err |
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} |
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line.TxErrors, err = strconv.ParseUint(fields[10], 10, 64) |
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if err != nil { |
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return nil, err |
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} |
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line.TxDropped, err = strconv.ParseUint(fields[11], 10, 64) |
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if err != nil { |
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return nil, err |
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} |
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line.TxFIFO, err = strconv.ParseUint(fields[12], 10, 64) |
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if err != nil { |
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return nil, err |
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} |
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line.TxCollisions, err = strconv.ParseUint(fields[13], 10, 64) |
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if err != nil { |
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return nil, err |
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} |
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line.TxCarrier, err = strconv.ParseUint(fields[14], 10, 64) |
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if err != nil { |
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return nil, err |
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} |
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line.TxCompressed, err = strconv.ParseUint(fields[15], 10, 64) |
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if err != nil { |
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return nil, err |
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} |
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return line, nil |
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} |
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// Total aggregates the values across interfaces and returns a new NetDevLine. |
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// The Name field will be a sorted comma separated list of interface names. |
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func (nd NetDev) Total() NetDevLine { |
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total := NetDevLine{} |
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names := make([]string, 0, len(nd)) |
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for _, ifc := range nd { |
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names = append(names, ifc.Name) |
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total.RxBytes += ifc.RxBytes |
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total.RxPackets += ifc.RxPackets |
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total.RxPackets += ifc.RxPackets |
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total.RxErrors += ifc.RxErrors |
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total.RxDropped += ifc.RxDropped |
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total.RxFIFO += ifc.RxFIFO |
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total.RxFrame += ifc.RxFrame |
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total.RxCompressed += ifc.RxCompressed |
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total.RxMulticast += ifc.RxMulticast |
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total.TxBytes += ifc.TxBytes |
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total.TxPackets += ifc.TxPackets |
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total.TxErrors += ifc.TxErrors |
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total.TxDropped += ifc.TxDropped |
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total.TxFIFO += ifc.TxFIFO |
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total.TxCollisions += ifc.TxCollisions |
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total.TxCarrier += ifc.TxCarrier |
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total.TxCompressed += ifc.TxCompressed |
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} |
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sort.Strings(names) |
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total.Name = strings.Join(names, ", ") |
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return total |
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}
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