diff options
Diffstat (limited to 'vendor/github.com/prometheus/procfs/mountinfo.go')
| -rw-r--r-- | vendor/github.com/prometheus/procfs/mountinfo.go | 180 |
1 files changed, 0 insertions, 180 deletions
diff --git a/vendor/github.com/prometheus/procfs/mountinfo.go b/vendor/github.com/prometheus/procfs/mountinfo.go deleted file mode 100644 index 59f4d5055..000000000 --- a/vendor/github.com/prometheus/procfs/mountinfo.go +++ /dev/null @@ -1,180 +0,0 @@ -// Copyright 2019 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" - "strconv" - "strings" - - "github.com/prometheus/procfs/internal/util" -) - -// A MountInfo is a type that describes the details, options -// for each mount, parsed from /proc/self/mountinfo. -// The fields described in each entry of /proc/self/mountinfo -// is described in the following man page. -// http://man7.org/linux/man-pages/man5/proc.5.html -type MountInfo struct { - // Unique ID for the mount - MountID int - // The ID of the parent mount - ParentID int - // The value of `st_dev` for the files on this FS - MajorMinorVer string - // The pathname of the directory in the FS that forms - // the root for this mount - Root string - // The pathname of the mount point relative to the root - MountPoint string - // Mount options - Options map[string]string - // Zero or more optional fields - OptionalFields map[string]string - // The Filesystem type - FSType string - // FS specific information or "none" - Source string - // Superblock options - SuperOptions map[string]string -} - -// Reads each line of the mountinfo file, and returns a list of formatted MountInfo structs. -func parseMountInfo(info []byte) ([]*MountInfo, error) { - mounts := []*MountInfo{} - scanner := bufio.NewScanner(bytes.NewReader(info)) - for scanner.Scan() { - mountString := scanner.Text() - parsedMounts, err := parseMountInfoString(mountString) - if err != nil { - return nil, err - } - mounts = append(mounts, parsedMounts) - } - - err := scanner.Err() - return mounts, err -} - -// Parses a mountinfo file line, and converts it to a MountInfo struct. -// An important check here is to see if the hyphen separator, as if it does not exist, -// it means that the line is malformed. -func parseMountInfoString(mountString string) (*MountInfo, error) { - var err error - - mountInfo := strings.Split(mountString, " ") - mountInfoLength := len(mountInfo) - if mountInfoLength < 10 { - return nil, fmt.Errorf("couldn't find enough fields in mount string: %s", mountString) - } - - if mountInfo[mountInfoLength-4] != "-" { - return nil, fmt.Errorf("couldn't find separator in expected field: %s", mountInfo[mountInfoLength-4]) - } - - mount := &MountInfo{ - MajorMinorVer: mountInfo[2], - Root: mountInfo[3], - MountPoint: mountInfo[4], - Options: mountOptionsParser(mountInfo[5]), - OptionalFields: nil, - FSType: mountInfo[mountInfoLength-3], - Source: mountInfo[mountInfoLength-2], - SuperOptions: mountOptionsParser(mountInfo[mountInfoLength-1]), - } - - mount.MountID, err = strconv.Atoi(mountInfo[0]) - if err != nil { - return nil, fmt.Errorf("failed to parse mount ID") - } - mount.ParentID, err = strconv.Atoi(mountInfo[1]) - if err != nil { - return nil, fmt.Errorf("failed to parse parent ID") - } - // Has optional fields, which is a space separated list of values. - // Example: shared:2 master:7 - if mountInfo[6] != "" { - mount.OptionalFields, err = mountOptionsParseOptionalFields(mountInfo[6 : mountInfoLength-4]) - if err != nil { - return nil, err - } - } - return mount, nil -} - -// mountOptionsIsValidField checks a string against a valid list of optional fields keys. -func mountOptionsIsValidField(s string) bool { - switch s { - case - "shared", - "master", - "propagate_from", - "unbindable": - return true - } - return false -} - -// mountOptionsParseOptionalFields parses a list of optional fields strings into a double map of strings. -func mountOptionsParseOptionalFields(o []string) (map[string]string, error) { - optionalFields := make(map[string]string) - for _, field := range o { - optionSplit := strings.SplitN(field, ":", 2) - value := "" - if len(optionSplit) == 2 { - value = optionSplit[1] - } - if mountOptionsIsValidField(optionSplit[0]) { - optionalFields[optionSplit[0]] = value - } - } - return optionalFields, nil -} - -// mountOptionsParser parses the mount options, superblock options. -func mountOptionsParser(mountOptions string) map[string]string { - opts := make(map[string]string) - options := strings.Split(mountOptions, ",") - for _, opt := range options { - splitOption := strings.Split(opt, "=") - if len(splitOption) < 2 { - key := splitOption[0] - opts[key] = "" - } else { - key, value := splitOption[0], splitOption[1] - opts[key] = value - } - } - return opts -} - -// GetMounts retrieves mountinfo information from `/proc/self/mountinfo`. -func GetMounts() ([]*MountInfo, error) { - data, err := util.ReadFileNoStat("/proc/self/mountinfo") - if err != nil { - return nil, err - } - return parseMountInfo(data) -} - -// GetProcMounts retrieves mountinfo information from a processes' `/proc/<pid>/mountinfo`. -func GetProcMounts(pid int) ([]*MountInfo, error) { - data, err := util.ReadFileNoStat(fmt.Sprintf("/proc/%d/mountinfo", pid)) - if err != nil { - return nil, err - } - return parseMountInfo(data) -} |