storj.io/minio@v0.0.0-20230509071714-0cbc90f649b1/pkg/disk/stat_linux_s390x.go (about)

     1  //go:build linux && s390x
     2  // +build linux,s390x
     3  
     4  /*
     5   * MinIO Cloud Storage, (C) 2020 MinIO, Inc.
     6   *
     7   * Licensed under the Apache License, Version 2.0 (the "License");
     8   * you may not use this file except in compliance with the License.
     9   * You may obtain a copy of the License at
    10   *
    11   *     http://www.apache.org/licenses/LICENSE-2.0
    12   *
    13   * Unless required by applicable law or agreed to in writing, software
    14   * distributed under the License is distributed on an "AS IS" BASIS,
    15   * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
    16   * See the License for the specific language governing permissions and
    17   * limitations under the License.
    18   */
    19  
    20  package disk
    21  
    22  import (
    23  	"fmt"
    24  	"strconv"
    25  	"syscall"
    26  )
    27  
    28  // fsType2StringMap - list of filesystems supported on linux
    29  var fsType2StringMap = map[string]string{
    30  	"1021994":  "TMPFS",
    31  	"137d":     "EXT",
    32  	"4244":     "HFS",
    33  	"4d44":     "MSDOS",
    34  	"52654973": "REISERFS",
    35  	"5346544e": "NTFS",
    36  	"58465342": "XFS",
    37  	"61756673": "AUFS",
    38  	"6969":     "NFS",
    39  	"ef51":     "EXT2OLD",
    40  	"ef53":     "EXT4",
    41  	"f15f":     "ecryptfs",
    42  	"794c7630": "overlayfs",
    43  	"2fc12fc1": "zfs",
    44  	"ff534d42": "cifs",
    45  	"53464846": "wslfs",
    46  }
    47  
    48  // getFSType returns the filesystem type of the underlying mounted filesystem
    49  func getFSType(ftype uint32) string {
    50  	fsTypeHex := strconv.FormatUint(uint64(ftype), 16)
    51  	fsTypeString, ok := fsType2StringMap[fsTypeHex]
    52  	if !ok {
    53  		return "UNKNOWN"
    54  	}
    55  	return fsTypeString
    56  }
    57  
    58  // GetInfo returns total and free bytes available in a directory, e.g. `/`.
    59  func GetInfo(path string) (info Info, err error) {
    60  	s := syscall.Statfs_t{}
    61  	err = syscall.Statfs(path, &s)
    62  	if err != nil {
    63  		return Info{}, err
    64  	}
    65  	reservedBlocks := s.Bfree - s.Bavail
    66  	info = Info{
    67  		Total:  uint64(s.Frsize) * (s.Blocks - reservedBlocks),
    68  		Free:   uint64(s.Frsize) * s.Bavail,
    69  		Files:  s.Files,
    70  		Ffree:  s.Ffree,
    71  		FSType: getFSType(s.Type),
    72  	}
    73  	// Check for overflows.
    74  	// https://github.com/minio/minio/issues/8035
    75  	// XFS can show wrong values at times error out
    76  	// in such scenarios.
    77  	if info.Free > info.Total {
    78  		return info, fmt.Errorf("detected free space (%d) > total disk space (%d), fs corruption at (%s). please run 'fsck'", info.Free, info.Total, path)
    79  	}
    80  	info.Used = info.Total - info.Free
    81  	return info, nil
    82  }