You can not select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
383 lines
11 KiB
383 lines
11 KiB
/*
|
|
* Minio Cloud Storage, (C) 2015 Minio, Inc.
|
|
*
|
|
* 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 fs
|
|
|
|
import (
|
|
"bytes"
|
|
"io"
|
|
"os"
|
|
"path/filepath"
|
|
"strings"
|
|
|
|
"crypto/md5"
|
|
"encoding/base64"
|
|
"encoding/hex"
|
|
"errors"
|
|
"runtime"
|
|
|
|
"github.com/minio/minio-xl/pkg/atomic"
|
|
"github.com/minio/minio-xl/pkg/crypto/sha256"
|
|
"github.com/minio/minio-xl/pkg/probe"
|
|
"github.com/minio/minio/pkg/contentdb"
|
|
"github.com/minio/minio/pkg/disk"
|
|
)
|
|
|
|
/// Object Operations
|
|
|
|
// GetObject - GET object
|
|
func (fs Filesystem) GetObject(w io.Writer, bucket, object string, start, length int64) (int64, *probe.Error) {
|
|
fs.lock.Lock()
|
|
defer fs.lock.Unlock()
|
|
|
|
// validate bucket
|
|
if !IsValidBucketName(bucket) {
|
|
return 0, probe.NewError(BucketNameInvalid{Bucket: bucket})
|
|
}
|
|
|
|
// validate object
|
|
if !IsValidObjectName(object) {
|
|
return 0, probe.NewError(ObjectNameInvalid{Bucket: bucket, Object: object})
|
|
}
|
|
|
|
bucket = fs.denormalizeBucket(bucket)
|
|
bucketPath := filepath.Join(fs.path, bucket)
|
|
if _, e := os.Stat(bucketPath); e != nil {
|
|
if os.IsNotExist(e) {
|
|
return 0, probe.NewError(BucketNotFound{Bucket: bucket})
|
|
}
|
|
return 0, probe.NewError(e)
|
|
}
|
|
|
|
objectPath := filepath.Join(bucketPath, object)
|
|
filestat, err := os.Stat(objectPath)
|
|
switch err := err.(type) {
|
|
case nil:
|
|
if filestat.IsDir() {
|
|
return 0, probe.NewError(ObjectNotFound{Bucket: bucket, Object: object})
|
|
}
|
|
default:
|
|
if os.IsNotExist(err) {
|
|
return 0, probe.NewError(ObjectNotFound{Bucket: bucket, Object: object})
|
|
}
|
|
return 0, probe.NewError(err)
|
|
}
|
|
file, err := os.Open(objectPath)
|
|
if err != nil {
|
|
return 0, probe.NewError(err)
|
|
}
|
|
defer file.Close()
|
|
|
|
_, err = file.Seek(start, os.SEEK_SET)
|
|
if err != nil {
|
|
return 0, probe.NewError(err)
|
|
}
|
|
|
|
var count int64
|
|
if length > 0 {
|
|
count, err = io.CopyN(w, file, length)
|
|
if err != nil {
|
|
return count, probe.NewError(err)
|
|
}
|
|
} else {
|
|
count, err = io.Copy(w, file)
|
|
if err != nil {
|
|
return count, probe.NewError(err)
|
|
}
|
|
}
|
|
return count, nil
|
|
}
|
|
|
|
// GetObjectMetadata - HEAD object
|
|
func (fs Filesystem) GetObjectMetadata(bucket, object string) (ObjectMetadata, *probe.Error) {
|
|
fs.lock.Lock()
|
|
defer fs.lock.Unlock()
|
|
|
|
if !IsValidBucketName(bucket) {
|
|
return ObjectMetadata{}, probe.NewError(BucketNameInvalid{Bucket: bucket})
|
|
}
|
|
|
|
if !IsValidObjectName(object) {
|
|
return ObjectMetadata{}, probe.NewError(ObjectNameInvalid{Bucket: bucket, Object: bucket})
|
|
}
|
|
|
|
bucket = fs.denormalizeBucket(bucket)
|
|
bucketPath := filepath.Join(fs.path, bucket)
|
|
if _, e := os.Stat(bucketPath); e != nil {
|
|
if os.IsNotExist(e) {
|
|
return ObjectMetadata{}, probe.NewError(BucketNotFound{Bucket: bucket})
|
|
}
|
|
return ObjectMetadata{}, probe.NewError(e)
|
|
}
|
|
|
|
metadata, err := getMetadata(fs.path, bucket, object)
|
|
if err != nil {
|
|
return ObjectMetadata{}, err.Trace(bucket, object)
|
|
}
|
|
if metadata.Mode.IsDir() {
|
|
return ObjectMetadata{}, probe.NewError(ObjectNotFound{Bucket: bucket, Object: object})
|
|
}
|
|
return metadata, nil
|
|
}
|
|
|
|
func getMetadata(rootPath, bucket, object string) (ObjectMetadata, *probe.Error) {
|
|
// Do not use filepath.Join() since filepath.Join strips off any object names with '/', use them as is
|
|
// in a static manner so that we can send a proper 'ObjectNotFound' reply back upon os.Stat()
|
|
var objectPath string
|
|
// For windows use its special os.PathSeparator == "\\"
|
|
if runtime.GOOS == "windows" {
|
|
objectPath = rootPath + string(os.PathSeparator) + bucket + string(os.PathSeparator) + object
|
|
} else {
|
|
objectPath = rootPath + string(os.PathSeparator) + bucket + string(os.PathSeparator) + object
|
|
}
|
|
stat, err := os.Stat(objectPath)
|
|
if err != nil {
|
|
if os.IsNotExist(err) {
|
|
return ObjectMetadata{}, probe.NewError(ObjectNotFound{Bucket: bucket, Object: object})
|
|
}
|
|
return ObjectMetadata{}, probe.NewError(err)
|
|
}
|
|
contentType := "application/octet-stream"
|
|
if runtime.GOOS == "windows" {
|
|
object = sanitizeWindowsPath(object)
|
|
}
|
|
if objectExt := filepath.Ext(object); objectExt != "" {
|
|
contentType = contentdb.MustLookup(strings.ToLower(strings.TrimPrefix(objectExt, ".")))
|
|
}
|
|
metadata := ObjectMetadata{
|
|
Bucket: bucket,
|
|
Object: object,
|
|
Created: stat.ModTime(),
|
|
Size: stat.Size(),
|
|
ContentType: contentType,
|
|
Mode: stat.Mode(),
|
|
}
|
|
return metadata, nil
|
|
}
|
|
|
|
// isMD5SumEqual - returns error if md5sum mismatches, success its `nil`
|
|
func isMD5SumEqual(expectedMD5Sum, actualMD5Sum string) *probe.Error {
|
|
if strings.TrimSpace(expectedMD5Sum) != "" && strings.TrimSpace(actualMD5Sum) != "" {
|
|
expectedMD5SumBytes, err := hex.DecodeString(expectedMD5Sum)
|
|
if err != nil {
|
|
return probe.NewError(err)
|
|
}
|
|
actualMD5SumBytes, err := hex.DecodeString(actualMD5Sum)
|
|
if err != nil {
|
|
return probe.NewError(err)
|
|
}
|
|
if !bytes.Equal(expectedMD5SumBytes, actualMD5SumBytes) {
|
|
return probe.NewError(BadDigest{Md5: expectedMD5Sum})
|
|
}
|
|
return nil
|
|
}
|
|
return probe.NewError(errors.New("invalid argument"))
|
|
}
|
|
|
|
// CreateObject - PUT object
|
|
func (fs Filesystem) CreateObject(bucket, object, expectedMD5Sum string, size int64, data io.Reader, signature *Signature) (ObjectMetadata, *probe.Error) {
|
|
fs.lock.Lock()
|
|
defer fs.lock.Unlock()
|
|
|
|
di, e := disk.GetInfo(fs.path)
|
|
if e != nil {
|
|
return ObjectMetadata{}, probe.NewError(e)
|
|
}
|
|
|
|
// Remove 5% from total space for cumulative disk space used for journalling, inodes etc.
|
|
availableDiskSpace := (float64(di.Free) / (float64(di.Total) - (0.05 * float64(di.Total)))) * 100
|
|
if int64(availableDiskSpace) <= fs.minFreeDisk {
|
|
return ObjectMetadata{}, probe.NewError(RootPathFull{Path: fs.path})
|
|
}
|
|
|
|
// check bucket name valid
|
|
if !IsValidBucketName(bucket) {
|
|
return ObjectMetadata{}, probe.NewError(BucketNameInvalid{Bucket: bucket})
|
|
}
|
|
|
|
bucket = fs.denormalizeBucket(bucket)
|
|
bucketPath := filepath.Join(fs.path, bucket)
|
|
if _, e = os.Stat(bucketPath); e != nil {
|
|
if os.IsNotExist(e) {
|
|
return ObjectMetadata{}, probe.NewError(BucketNotFound{Bucket: bucket})
|
|
}
|
|
return ObjectMetadata{}, probe.NewError(e)
|
|
}
|
|
// verify object path legal
|
|
if !IsValidObjectName(object) {
|
|
return ObjectMetadata{}, probe.NewError(ObjectNameInvalid{Bucket: bucket, Object: object})
|
|
}
|
|
|
|
// get object path
|
|
objectPath := filepath.Join(bucketPath, object)
|
|
if strings.TrimSpace(expectedMD5Sum) != "" {
|
|
var expectedMD5SumBytes []byte
|
|
expectedMD5SumBytes, e = base64.StdEncoding.DecodeString(strings.TrimSpace(expectedMD5Sum))
|
|
if e != nil {
|
|
// pro-actively close the connection
|
|
return ObjectMetadata{}, probe.NewError(InvalidDigest{Md5: expectedMD5Sum})
|
|
}
|
|
expectedMD5Sum = hex.EncodeToString(expectedMD5SumBytes)
|
|
}
|
|
|
|
// write object
|
|
file, e := atomic.FileCreateWithPrefix(objectPath, "")
|
|
if e != nil {
|
|
switch e := e.(type) {
|
|
case *os.PathError:
|
|
if e.Op == "mkdir" {
|
|
if strings.Contains(e.Error(), "not a directory") {
|
|
return ObjectMetadata{}, probe.NewError(ObjectExistsAsPrefix{Bucket: bucket, Prefix: object})
|
|
}
|
|
}
|
|
return ObjectMetadata{}, probe.NewError(e)
|
|
default:
|
|
return ObjectMetadata{}, probe.NewError(e)
|
|
}
|
|
}
|
|
|
|
h := md5.New()
|
|
sh := sha256.New()
|
|
mw := io.MultiWriter(file, h, sh)
|
|
|
|
if size > 0 {
|
|
_, e = io.CopyN(mw, data, size)
|
|
if e != nil {
|
|
file.CloseAndPurge()
|
|
return ObjectMetadata{}, probe.NewError(e)
|
|
}
|
|
} else {
|
|
_, e = io.Copy(mw, data)
|
|
if e != nil {
|
|
file.CloseAndPurge()
|
|
return ObjectMetadata{}, probe.NewError(e)
|
|
}
|
|
}
|
|
|
|
md5Sum := hex.EncodeToString(h.Sum(nil))
|
|
// Verify if the written object is equal to what is expected, only if it is requested as such
|
|
if strings.TrimSpace(expectedMD5Sum) != "" {
|
|
if e := isMD5SumEqual(strings.TrimSpace(expectedMD5Sum), md5Sum); e != nil {
|
|
file.CloseAndPurge()
|
|
return ObjectMetadata{}, probe.NewError(BadDigest{Md5: expectedMD5Sum, Bucket: bucket, Object: object})
|
|
}
|
|
}
|
|
sha256Sum := hex.EncodeToString(sh.Sum(nil))
|
|
if signature != nil {
|
|
ok, err := signature.DoesSignatureMatch(sha256Sum)
|
|
if err != nil {
|
|
file.CloseAndPurge()
|
|
return ObjectMetadata{}, err.Trace()
|
|
}
|
|
if !ok {
|
|
file.CloseAndPurge()
|
|
return ObjectMetadata{}, probe.NewError(SignatureDoesNotMatch{})
|
|
}
|
|
}
|
|
file.Close()
|
|
|
|
st, e := os.Stat(objectPath)
|
|
if e != nil {
|
|
return ObjectMetadata{}, probe.NewError(e)
|
|
}
|
|
contentType := "application/octet-stream"
|
|
if objectExt := filepath.Ext(objectPath); objectExt != "" {
|
|
contentType = contentdb.MustLookup(strings.ToLower(strings.TrimPrefix(objectExt, ".")))
|
|
}
|
|
newObject := ObjectMetadata{
|
|
Bucket: bucket,
|
|
Object: object,
|
|
Created: st.ModTime(),
|
|
Size: st.Size(),
|
|
ContentType: contentType,
|
|
Md5: md5Sum,
|
|
}
|
|
return newObject, nil
|
|
}
|
|
|
|
func deleteObjectPath(basePath, deletePath, bucket, object string) *probe.Error {
|
|
if basePath == deletePath {
|
|
return nil
|
|
}
|
|
|
|
fi, e := os.Stat(deletePath)
|
|
if e != nil {
|
|
if os.IsNotExist(e) {
|
|
return probe.NewError(ObjectNotFound{Bucket: bucket, Object: object})
|
|
}
|
|
return probe.NewError(e)
|
|
}
|
|
if fi.IsDir() {
|
|
empty, err := isDirEmpty(deletePath)
|
|
if err != nil {
|
|
return err.Trace(deletePath)
|
|
}
|
|
if !empty {
|
|
return nil
|
|
}
|
|
}
|
|
|
|
if e := os.Remove(deletePath); e != nil {
|
|
return probe.NewError(e)
|
|
}
|
|
if err := deleteObjectPath(basePath, filepath.Dir(deletePath), bucket, object); err != nil {
|
|
return err.Trace(basePath, deletePath, bucket, object)
|
|
}
|
|
return nil
|
|
}
|
|
|
|
// DeleteObject - delete and object
|
|
func (fs Filesystem) DeleteObject(bucket, object string) *probe.Error {
|
|
fs.lock.Lock()
|
|
defer fs.lock.Unlock()
|
|
|
|
// check bucket name valid
|
|
if !IsValidBucketName(bucket) {
|
|
return probe.NewError(BucketNameInvalid{Bucket: bucket})
|
|
}
|
|
|
|
bucket = fs.denormalizeBucket(bucket)
|
|
bucketPath := filepath.Join(fs.path, bucket)
|
|
// check bucket exists
|
|
if _, e := os.Stat(bucketPath); e != nil {
|
|
if os.IsNotExist(e) {
|
|
return probe.NewError(BucketNotFound{Bucket: bucket})
|
|
}
|
|
return probe.NewError(e)
|
|
}
|
|
|
|
// verify object path legal
|
|
if !IsValidObjectName(object) {
|
|
return probe.NewError(ObjectNameInvalid{Bucket: bucket, Object: object})
|
|
}
|
|
|
|
// Do not use filepath.Join() since filepath.Join strips off any object names with '/', use them as is
|
|
// in a static manner so that we can send a proper 'ObjectNotFound' reply back upon os.Stat()
|
|
var objectPath string
|
|
if runtime.GOOS == "windows" {
|
|
objectPath = fs.path + string(os.PathSeparator) + bucket + string(os.PathSeparator) + object
|
|
} else {
|
|
objectPath = fs.path + string(os.PathSeparator) + bucket + string(os.PathSeparator) + object
|
|
}
|
|
err := deleteObjectPath(bucketPath, objectPath, bucket, object)
|
|
if os.IsNotExist(err.ToGoError()) {
|
|
return probe.NewError(ObjectNotFound{Bucket: bucket, Object: object})
|
|
}
|
|
if err != nil {
|
|
return err.Trace(bucketPath, objectPath, bucket, object)
|
|
}
|
|
return nil
|
|
}
|
|
|