github.com/cs3org/reva/v2@v2.27.7/pkg/storage/utils/localfs/localfs_windows.go (about)

     1  // Copyright 2018-2021 CERN
     2  //
     3  // Licensed under the Apache License, Version 2.0 (the "License");
     4  // you may not use this file except in compliance with the License.
     5  // You may obtain a copy of the License at
     6  //
     7  //     http://www.apache.org/licenses/LICENSE-2.0
     8  //
     9  // Unless required by applicable law or agreed to in writing, software
    10  // distributed under the License is distributed on an "AS IS" BASIS,
    11  // WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
    12  // See the License for the specific language governing permissions and
    13  // limitations under the License.
    14  //
    15  // In applying this license, CERN does not waive the privileges and immunities
    16  // granted to it by virtue of its status as an Intergovernmental Organization
    17  // or submit itself to any jurisdiction.
    18  
    19  //go:build windows
    20  // +build windows
    21  
    22  package localfs
    23  
    24  import (
    25  	"context"
    26  	"crypto/md5"
    27  	"encoding/binary"
    28  	"fmt"
    29  	"os"
    30  	"strings"
    31  
    32  	provider "github.com/cs3org/go-cs3apis/cs3/storage/provider/v1beta1"
    33  	"github.com/cs3org/reva/v2/pkg/appctx"
    34  	"golang.org/x/sys/windows"
    35  )
    36  
    37  // calcEtag will create an etag based on the md5 of
    38  // - mtime,
    39  // - inode (if available),
    40  // - device (if available) and
    41  // - size.
    42  // errors are logged, but an etag will still be returned
    43  func calcEtag(ctx context.Context, fi os.FileInfo) string {
    44  	log := appctx.GetLogger(ctx)
    45  	h := md5.New()
    46  	err := binary.Write(h, binary.BigEndian, fi.ModTime().Unix())
    47  	if err != nil {
    48  		log.Error().Err(err).Msg("error writing mtime")
    49  	}
    50  	// device and inode have no meaning on windows
    51  	err = binary.Write(h, binary.BigEndian, fi.Size())
    52  	if err != nil {
    53  		log.Error().Err(err).Msg("error writing size")
    54  	}
    55  	etag := fmt.Sprintf(`"%x"`, h.Sum(nil))
    56  	return fmt.Sprintf("\"%s\"", strings.Trim(etag, "\""))
    57  }
    58  
    59  func (fs *localfs) GetQuota(ctx context.Context, ref *provider.Reference) (uint64, uint64, uint64, error) {
    60  	// TODO quota of which storage space?
    61  	// we could use the logged in user, but when a user has access to multiple storages this falls short
    62  	// for now return quota of root
    63  	var free, total, avail uint64
    64  
    65  	pathPtr, err := windows.UTF16PtrFromString(fs.wrap(ctx, "/"))
    66  	if err != nil {
    67  		return 0, 0, 0, err
    68  	}
    69  	err = windows.GetDiskFreeSpaceEx(pathPtr, &avail, &total, &free)
    70  	if err != nil {
    71  		return 0, 0, 0, err
    72  	}
    73  
    74  	used := total - free
    75  	return total, used, free, nil
    76  }