diff options
Diffstat (limited to 'vendor/github.com/prometheus/procfs/net_conntrackstat.go')
-rw-r--r-- | vendor/github.com/prometheus/procfs/net_conntrackstat.go | 118 |
1 files changed, 0 insertions, 118 deletions
diff --git a/vendor/github.com/prometheus/procfs/net_conntrackstat.go b/vendor/github.com/prometheus/procfs/net_conntrackstat.go deleted file mode 100644 index 316df5fbb..000000000 --- a/vendor/github.com/prometheus/procfs/net_conntrackstat.go +++ /dev/null @@ -1,118 +0,0 @@ -// 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. - -package procfs - -import ( - "bufio" - "bytes" - "fmt" - "io" - "strings" - - "github.com/prometheus/procfs/internal/util" -) - -// A ConntrackStatEntry represents one line from net/stat/nf_conntrack -// and contains netfilter conntrack statistics at one CPU core. -type ConntrackStatEntry struct { - Entries uint64 - Searched uint64 - Found uint64 - New uint64 - Invalid uint64 - Ignore uint64 - Delete uint64 - DeleteList uint64 - Insert uint64 - InsertFailed uint64 - Drop uint64 - EarlyDrop uint64 - SearchRestart uint64 -} - -// ConntrackStat retrieves netfilter's conntrack statistics, split by CPU cores. -func (fs FS) ConntrackStat() ([]ConntrackStatEntry, error) { - return readConntrackStat(fs.proc.Path("net", "stat", "nf_conntrack")) -} - -// Parses a slice of ConntrackStatEntries from the given filepath. -func readConntrackStat(path string) ([]ConntrackStatEntry, error) { - // This file is small and can be read with one syscall. - b, err := util.ReadFileNoStat(path) - if err != nil { - // Do not wrap this error so the caller can detect os.IsNotExist and - // similar conditions. - return nil, err - } - - stat, err := parseConntrackStat(bytes.NewReader(b)) - if err != nil { - return nil, fmt.Errorf("%w: Cannot read file: %v: %w", ErrFileRead, path, err) - } - - return stat, nil -} - -// Reads the contents of a conntrack statistics file and parses a slice of ConntrackStatEntries. -func parseConntrackStat(r io.Reader) ([]ConntrackStatEntry, error) { - var entries []ConntrackStatEntry - - scanner := bufio.NewScanner(r) - scanner.Scan() - for scanner.Scan() { - fields := strings.Fields(scanner.Text()) - conntrackEntry, err := parseConntrackStatEntry(fields) - if err != nil { - return nil, err - } - entries = append(entries, *conntrackEntry) - } - - return entries, nil -} - -// Parses a ConntrackStatEntry from given array of fields. -func parseConntrackStatEntry(fields []string) (*ConntrackStatEntry, error) { - entries, err := util.ParseHexUint64s(fields) - if err != nil { - return nil, fmt.Errorf("%w: Cannot parse entry: %d: %w", ErrFileParse, entries, err) - } - numEntries := len(entries) - if numEntries < 16 || numEntries > 17 { - return nil, - fmt.Errorf("%w: invalid conntrackstat entry, invalid number of fields: %d", ErrFileParse, numEntries) - } - - stats := &ConntrackStatEntry{ - Entries: *entries[0], - Searched: *entries[1], - Found: *entries[2], - New: *entries[3], - Invalid: *entries[4], - Ignore: *entries[5], - Delete: *entries[6], - DeleteList: *entries[7], - Insert: *entries[8], - InsertFailed: *entries[9], - Drop: *entries[10], - EarlyDrop: *entries[11], - } - - // Ignore missing search_restart on Linux < 2.6.35. - if numEntries == 17 { - stats.SearchRestart = *entries[16] - } - - return stats, nil -} |