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// Copyright 2017 The go-ethereum Authors
// This file is part of the go-ethereum library.
//
// The go-ethereum library is free software: you can redistribute it and/or modify
// it under the terms of the GNU Lesser General Public License as published by
// the Free Software Foundation, either version 3 of the License, or
// (at your option) any later version.
//
// The go-ethereum library is distributed in the hope that it will be useful,
// but WITHOUT ANY WARRANTY; without even the implied warranty of
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
// GNU Lesser General Public License for more details.
//
// You should have received a copy of the GNU Lesser General Public License
// along with the go-ethereum library. If not, see <http://www.gnu.org/licenses/>.
// +build linux darwin freebsd
package fuse
import (
"context"
"fmt"
"os/exec"
"runtime"
"github.com/ethereum/go-ethereum/swarm/log"
)
func externalUnmount(mountPoint string) error {
ctx, cancel := context.WithTimeout(context.Background(), unmountTimeout)
defer cancel()
// Try generic umount.
if err := exec.CommandContext(ctx, "umount", mountPoint).Run(); err == nil {
return nil
}
// Try FUSE-specific commands if umount didn't work.
switch runtime.GOOS {
case "darwin":
return exec.CommandContext(ctx, "diskutil", "umount", mountPoint).Run()
case "linux":
return exec.CommandContext(ctx, "fusermount", "-u", mountPoint).Run()
default:
return fmt.Errorf("swarmfs unmount: unimplemented")
}
}
func addFileToSwarm(sf *SwarmFile, content []byte, size int) error {
fkey, mhash, err := sf.mountInfo.swarmApi.AddFile(context.TODO(), sf.mountInfo.LatestManifest, sf.path, sf.name, content, true)
if err != nil {
return err
}
sf.lock.Lock()
defer sf.lock.Unlock()
sf.addr = fkey
sf.fileSize = int64(size)
sf.mountInfo.lock.Lock()
defer sf.mountInfo.lock.Unlock()
sf.mountInfo.LatestManifest = mhash
log.Info("swarmfs added new file:", "fname", sf.name, "new Manifest hash", mhash)
return nil
}
func removeFileFromSwarm(sf *SwarmFile) error {
mkey, err := sf.mountInfo.swarmApi.RemoveFile(context.TODO(), sf.mountInfo.LatestManifest, sf.path, sf.name, true)
if err != nil {
return err
}
sf.mountInfo.lock.Lock()
defer sf.mountInfo.lock.Unlock()
sf.mountInfo.LatestManifest = mkey
log.Info("swarmfs removed file:", "fname", sf.name, "new Manifest hash", mkey)
return nil
}
func removeDirectoryFromSwarm(sd *SwarmDir) error {
if len(sd.directories) == 0 && len(sd.files) == 0 {
return nil
}
for _, d := range sd.directories {
err := removeDirectoryFromSwarm(d)
if err != nil {
return err
}
}
for _, f := range sd.files {
err := removeFileFromSwarm(f)
if err != nil {
return err
}
}
return nil
}
func appendToExistingFileInSwarm(sf *SwarmFile, content []byte, offset int64, length int64) error {
fkey, mhash, err := sf.mountInfo.swarmApi.AppendFile(context.TODO(), sf.mountInfo.LatestManifest, sf.path, sf.name, sf.fileSize, content, sf.addr, offset, length, true)
if err != nil {
return err
}
sf.lock.Lock()
defer sf.lock.Unlock()
sf.addr = fkey
sf.fileSize = sf.fileSize + int64(len(content))
sf.mountInfo.lock.Lock()
defer sf.mountInfo.lock.Unlock()
sf.mountInfo.LatestManifest = mhash
log.Info("swarmfs appended file:", "fname", sf.name, "new Manifest hash", mhash)
return nil
}
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