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mount/cmount: factor duplicated code into mountlib

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This commit is contained in:
Nick Craig-Wood 2017-06-19 13:44:49 +01:00
parent 4ce31555b2
commit dcce65b2b3
15 changed files with 275 additions and 428 deletions
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23
cmd/cmount/fs.go
View File

@ -39,19 +39,6 @@ func NewFS(f fs.Fs) *FS {
openFilesRd: newOpenFiles(0x03),
ready: make(chan (struct{})),
}
if noSeek {
fsys.FS.NoSeek()
}
if noChecksum {
fsys.FS.NoChecksum()
}
if readOnly {
fsys.FS.ReadOnly()
}
if pollInterval > 0 {
fsys.FS.PollChanges(pollInterval)
}
fsys.FS.SetDirCacheTime(dirCacheTime)
return fsys
}
@ -214,21 +201,21 @@ func (fsys *FS) stat(node mountlib.Node, stat *fuse.Stat_t) (errc int) {
switch x := node.(type) {
case *mountlib.Dir:
modTime = x.ModTime()
Mode = dirPerms | fuse.S_IFDIR
Mode = mountlib.DirPerms | fuse.S_IFDIR
case *mountlib.File:
var err error
modTime, Size, Blocks, err = x.Attr(noModTime)
modTime, Size, Blocks, err = x.Attr(mountlib.NoModTime)
if err != nil {
return translateError(err)
}
Mode = filePerms | fuse.S_IFREG
Mode = mountlib.FilePerms | fuse.S_IFREG
}
//stat.Dev = 1
stat.Ino = node.Inode() // FIXME do we need to set the inode number?
stat.Mode = uint32(Mode)
stat.Nlink = 1
stat.Uid = uid
stat.Gid = gid
stat.Uid = mountlib.UID
stat.Gid = mountlib.GID
//stat.Rdev
stat.Size = int64(Size)
t := fuse.NewTimespec(modTime)

177
cmd/cmount/mount.go
View File

@ -10,7 +10,6 @@ package cmount
import (
"fmt"
"log"
"os"
"os/signal"
"runtime"
@ -18,153 +17,17 @@ import (
"time"
"github.com/billziss-gh/cgofuse/fuse"
"github.com/ncw/rclone/cmd"
"github.com/ncw/rclone/cmd/mountlib"
"github.com/ncw/rclone/fs"
"github.com/pkg/errors"
"github.com/spf13/cobra"
)
// Globals
var (
noModTime = false
noChecksum = false
debugFUSE = false
noSeek = false
dirCacheTime = 5 * 60 * time.Second
pollInterval = time.Minute
// mount options
readOnly = false
allowNonEmpty = false
allowRoot = false
allowOther = false
defaultPermissions = false
writebackCache = false
maxReadAhead fs.SizeSuffix = 128 * 1024
umask = 0
uid = ^uint32(0) // these values instruct WinFSP-FUSE to use the current user
gid = ^uint32(0) // overriden for non windows in mount_unix.go
// foreground = false
// default permissions for directories - modified by umask in Mount
dirPerms = os.FileMode(0777)
filePerms = os.FileMode(0666)
extraOptions *[]string
extraFlags *[]string
)
func init() {
cmd.Root.AddCommand(commandDefintion)
commandDefintion.Flags().BoolVarP(&noModTime, "no-modtime", "", noModTime, "Don't read/write the modification time (can speed things up).")
commandDefintion.Flags().BoolVarP(&noChecksum, "no-checksum", "", noChecksum, "Don't compare checksums on up/download.")
commandDefintion.Flags().BoolVarP(&debugFUSE, "debug-fuse", "", debugFUSE, "Debug the FUSE internals - needs -v.")
commandDefintion.Flags().BoolVarP(&noSeek, "no-seek", "", noSeek, "Don't allow seeking in files.")
commandDefintion.Flags().DurationVarP(&dirCacheTime, "dir-cache-time", "", dirCacheTime, "Time to cache directory entries for.")
commandDefintion.Flags().DurationVarP(&pollInterval, "poll-interval", "", pollInterval, "Time to wait between polling for changes. Must be smaller than dir-cache-time. Only on supported remotes. Set to 0 to disable.")
// mount options
commandDefintion.Flags().BoolVarP(&readOnly, "read-only", "", readOnly, "Mount read-only.")
commandDefintion.Flags().BoolVarP(&allowNonEmpty, "allow-non-empty", "", allowNonEmpty, "Allow mounting over a non-empty directory.")
commandDefintion.Flags().BoolVarP(&allowRoot, "allow-root", "", allowRoot, "Allow access to root user.")
commandDefintion.Flags().BoolVarP(&allowOther, "allow-other", "", allowOther, "Allow access to other users.")
commandDefintion.Flags().BoolVarP(&defaultPermissions, "default-permissions", "", defaultPermissions, "Makes kernel enforce access control based on the file mode.")
commandDefintion.Flags().BoolVarP(&writebackCache, "write-back-cache", "", writebackCache, "Makes kernel buffer writes before sending them to rclone. Without this, writethrough caching is used.")
commandDefintion.Flags().VarP(&maxReadAhead, "max-read-ahead", "", "The number of bytes that can be prefetched for sequential reads.")
commandDefintion.Flags().IntVarP(&umask, "umask", "", umask, "Override the permission bits set by the filesystem.")
extraOptions = commandDefintion.Flags().StringArrayP("option", "o", []string{}, "Option for libfuse/WinFsp. Repeat if required.")
extraFlags = commandDefintion.Flags().StringArrayP("fuse-flag", "", []string{}, "Flags or arguments to be passed direct to libfuse/WinFsp. Repeat if required.")
//commandDefintion.Flags().BoolVarP(&foreground, "foreground", "", foreground, "Do not detach.")
}
var commandDefintion = &cobra.Command{
Use: commandName + " remote:path /path/to/mountpoint",
Short: `Mount the remote as a mountpoint. **EXPERIMENTAL**`,
Long: `
rclone ` + commandName + ` allows Linux, FreeBSD, macOS and Windows to
mount any of Rclone's cloud storage systems as a file system with
FUSE.
This is **EXPERIMENTAL** - use with care.
First set up your remote using ` + "`rclone config`" + `. Check it works with ` + "`rclone ls`" + ` etc.
Start the mount like this
rclone ` + commandName + ` remote:path/to/files /path/to/local/mount
Or on Windows like this where X: is an unused drive letter
rclone ` + commandName + ` remote:path/to/files X:
When the program ends, either via Ctrl+C or receiving a SIGINT or SIGTERM signal,
the mount is automatically stopped.
The umount operation can fail, for example when the mountpoint is busy.
When that happens, it is the user's responsibility to stop the mount manually with
# Linux
fusermount -u /path/to/local/mount
# OS X
umount /path/to/local/mount
### Limitations ###
This can only write files seqentially, it can only seek when reading.
This means that many applications won't work with their files on an
rclone mount.
The bucket based remotes (eg Swift, S3, Google Compute Storage, B2,
Hubic) won't work from the root - you will need to specify a bucket,
or a path within the bucket. So ` + "`swift:`" + ` won't work whereas
` + "`swift:bucket`" + ` will as will ` + "`swift:bucket/path`" + `.
None of these support the concept of directories, so empty
directories will have a tendency to disappear once they fall out of
the directory cache.
Only supported on Linux, FreeBSD, OS X and Windows at the moment.
### rclone ` + commandName + ` vs rclone sync/copy ##
File systems expect things to be 100% reliable, whereas cloud storage
systems are a long way from 100% reliable. The rclone sync/copy
commands cope with this with lots of retries. However rclone ` + commandName + `
can't use retries in the same way without making local copies of the
uploads. This might happen in the future, but for the moment rclone
` + commandName + ` won't do that, so will be less reliable than the rclone command.
### Filters ###
Note that all the rclone filters can be used to select a subset of the
files to be visible in the mount.
### Directory Cache ###
Using the ` + "`--dir-cache-time`" + ` flag, you can set how long a
directory should be considered up to date and not refreshed from the
backend. Changes made locally in the mount may appear immediately or
invalidate the cache. However, changes done on the remote will only
be picked up once the cache expires.
Alternatively, you can send a ` + "`SIGHUP`" + ` signal to rclone for
it to flush all directory caches, regardless of how old they are.
Assuming only one rclone instance is running, you can reset the cache
like this:
kill -SIGHUP $(pidof rclone)
### Bugs ###
* All the remotes should work for read, but some may not for write
* those which need to know the size in advance won't - eg B2
* maybe should pass in size as -1 to mean work it out
* Or put in an an upload cache to cache the files on disk first
`,
Run: func(command *cobra.Command, args []string) {
cmd.CheckArgs(2, 2, command, args)
fdst := cmd.NewFsDst(args)
err := Mount(fdst, args[1])
if err != nil {
log.Fatalf("Fatal error: %v", err)
}
},
name := "cmount"
if runtime.GOOS == "windows" {
name = "mount"
}
mountlib.NewMountCommand(name, Mount)
}
// mountOptions configures the options from the command line flags
@ -173,9 +36,9 @@ func mountOptions(device string, mountpoint string) (options []string) {
options = []string{
"-o", "fsname=" + device,
"-o", "subtype=rclone",
"-o", fmt.Sprintf("max_readahead=%d", maxReadAhead),
"-o", fmt.Sprintf("max_readahead=%d", mountlib.MaxReadAhead),
}
if debugFUSE {
if mountlib.DebugFUSE {
options = append(options, "-o", "debug")
}
@ -194,28 +57,28 @@ func mountOptions(device string, mountpoint string) (options []string) {
options = append(options, "--FileSystemName=rclone")
}
if allowNonEmpty {
if mountlib.AllowNonEmpty {
options = append(options, "-o", "nonempty")
}
if allowOther {
if mountlib.AllowOther {
options = append(options, "-o", "allow_other")
}
if allowRoot {
if mountlib.AllowRoot {
options = append(options, "-o", "allow_root")
}
if defaultPermissions {
if mountlib.DefaultPermissions {
options = append(options, "-o", "default_permissions")
}
if readOnly {
if mountlib.ReadOnly {
options = append(options, "-o", "ro")
}
if writebackCache {
if mountlib.WritebackCache {
// FIXME? options = append(options, "-o", WritebackCache())
}
for _, option := range *extraOptions {
for _, option := range *mountlib.ExtraOptions {
options = append(options, "-o", option)
}
for _, option := range *extraFlags {
for _, option := range *mountlib.ExtraFlags {
options = append(options, option)
}
return options
@ -304,16 +167,6 @@ func mount(f fs.Fs, mountpoint string) (*mountlib.FS, <-chan error, func() error
//
// If noModTime is set then it
func Mount(f fs.Fs, mountpoint string) error {
// Set permissions
dirPerms = 0777 &^ os.FileMode(umask)
filePerms = 0666 &^ os.FileMode(umask)
// Show stats if the user has specifically requested them
if cmd.ShowStats() {
stopStats := cmd.StartStats()
defer close(stopStats)
}
// Mount it
FS, errChan, _, err := mount(f, mountpoint)
if err != nil {

2
cmd/cmount/mount_test.go
View File

@ -17,7 +17,7 @@ func notWin(t *testing.T) {
}
}
func TestMain(m *testing.M) { mounttest.TestMain(m, mount, dirPerms, filePerms) }
func TestMain(m *testing.M) { mounttest.TestMain(m, mount) }
func TestDirLs(t *testing.T) { mounttest.TestDirLs(t) }
func TestDirCreateAndRemoveDir(t *testing.T) { notWin(t); mounttest.TestDirCreateAndRemoveDir(t) }
func TestDirCreateAndRemoveFile(t *testing.T) { notWin(t); mounttest.TestDirCreateAndRemoveFile(t) }

18
cmd/cmount/mount_unix.go
View File

@ -1,18 +0,0 @@
// +build cmount
// +build cgo
// +build linux darwin freebsd
package cmount
import "golang.org/x/sys/unix"
const commandName = "cmount"
func init() {
umask = unix.Umask(0) // read the umask
unix.Umask(umask) // set it back to what it was
uid = uint32(unix.Geteuid())
gid = uint32(unix.Getegid())
commandDefintion.Flags().Uint32VarP(&uid, "uid", "", uid, "Override the uid field set by the filesystem.")
commandDefintion.Flags().Uint32VarP(&gid, "gid", "", gid, "Override the gid field set by the filesystem.")
}

7
cmd/cmount/mount_windows.go
View File

@ -1,7 +0,0 @@
// +build cmount
// +build cgo
// +build windows
package cmount
const commandName = "mount"

8
cmd/mount/dir.go
View File

@ -42,9 +42,9 @@ var _ fusefs.Node = (*Dir)(nil)
// Attr updates the attributes of a directory
func (d *Dir) Attr(ctx context.Context, a *fuse.Attr) (err error) {
defer fs.Trace(d, "")("attr=%+v, err=%v", a, &err)
a.Gid = gid
a.Uid = uid
a.Mode = os.ModeDir | dirPerms
a.Gid = mountlib.GID
a.Uid = mountlib.UID
a.Mode = os.ModeDir | mountlib.DirPerms
modTime := d.ModTime()
a.Atime = modTime
a.Mtime = modTime
@ -61,7 +61,7 @@ var _ fusefs.NodeSetattrer = (*Dir)(nil)
// Setattr handles attribute changes from FUSE. Currently supports ModTime only.
func (d *Dir) Setattr(ctx context.Context, req *fuse.SetattrRequest, resp *fuse.SetattrResponse) (err error) {
defer fs.Trace(d, "stat=%+v", req)("err=%v", &err)
if noModTime {
if mountlib.NoModTime {
return nil
}

12
cmd/mount/file.go
View File

@ -30,13 +30,13 @@ var _ fusefs.Node = (*File)(nil)
// Attr fills out the attributes for the file
func (f *File) Attr(ctx context.Context, a *fuse.Attr) (err error) {
defer fs.Trace(f, "")("a=%+v, err=%v", a, &err)
modTime, Size, Blocks, err := f.File.Attr(noModTime)
modTime, Size, Blocks, err := f.File.Attr(mountlib.NoModTime)
if err != nil {
return translateError(err)
}
a.Gid = gid
a.Uid = uid
a.Mode = filePerms
a.Gid = mountlib.GID
a.Uid = mountlib.UID
a.Mode = mountlib.FilePerms
a.Size = Size
a.Atime = modTime
a.Mtime = modTime
@ -52,7 +52,7 @@ var _ fusefs.NodeSetattrer = (*File)(nil)
// Setattr handles attribute changes from FUSE. Currently supports ModTime only.
func (f *File) Setattr(ctx context.Context, req *fuse.SetattrRequest, resp *fuse.SetattrResponse) (err error) {
defer fs.Trace(f, "a=%+v", req)("err=%v", &err)
if noModTime {
if mountlib.NoModTime {
return nil
}
if req.Valid.MtimeNow() {
@ -71,7 +71,7 @@ func (f *File) Open(ctx context.Context, req *fuse.OpenRequest, resp *fuse.OpenR
defer fs.Trace(f, "flags=%v", req.Flags)("fh=%v, err=%v", &fh, &err)
switch {
case req.Flags.IsReadOnly():
if noSeek {
if mountlib.NoSeek {
resp.Flags |= fuse.OpenNonSeekable
}
var rfh *mountlib.ReadFileHandle

13
cmd/mount/fs.go
View File

@ -30,19 +30,6 @@ func NewFS(f fs.Fs) *FS {
FS: mountlib.NewFS(f),
f: f,
}
if noSeek {
fsys.FS.NoSeek()
}
if noChecksum {
fsys.FS.NoChecksum()
}
if readOnly {
fsys.FS.ReadOnly()
}
if pollInterval > 0 {
fsys.FS.PollChanges(pollInterval)
}
fsys.FS.SetDirCacheTime(dirCacheTime)
return fsys
}

172
cmd/mount/mount.go
View File

@ -5,163 +5,25 @@
package mount
import (
"log"
"os"
"os/signal"
"syscall"
"time"
"bazil.org/fuse"
fusefs "bazil.org/fuse/fs"
"github.com/ncw/rclone/cmd"
"github.com/ncw/rclone/cmd/mountlib"
"github.com/ncw/rclone/fs"
"github.com/pkg/errors"
"github.com/spf13/cobra"
"golang.org/x/sys/unix"
)
// Globals
var (
noModTime = false
noChecksum = false
debugFUSE = false
noSeek = false
dirCacheTime = 5 * 60 * time.Second
pollInterval = time.Minute
// mount options
readOnly = false
allowNonEmpty = false
allowRoot = false
allowOther = false
defaultPermissions = false
writebackCache = false
maxReadAhead fs.SizeSuffix = 128 * 1024
umask = 0
uid = uint32(unix.Geteuid())
gid = uint32(unix.Getegid())
// foreground = false
// default permissions for directories - modified by umask in Mount
dirPerms = os.FileMode(0777)
filePerms = os.FileMode(0666)
)
func init() {
umask = unix.Umask(0) // read the umask
unix.Umask(umask) // set it back to what it was
cmd.Root.AddCommand(commandDefintion)
commandDefintion.Flags().BoolVarP(&noModTime, "no-modtime", "", noModTime, "Don't read/write the modification time (can speed things up).")
commandDefintion.Flags().BoolVarP(&noChecksum, "no-checksum", "", noChecksum, "Don't compare checksums on up/download.")
commandDefintion.Flags().BoolVarP(&debugFUSE, "debug-fuse", "", debugFUSE, "Debug the FUSE internals - needs -v.")
commandDefintion.Flags().BoolVarP(&noSeek, "no-seek", "", noSeek, "Don't allow seeking in files.")
commandDefintion.Flags().DurationVarP(&dirCacheTime, "dir-cache-time", "", dirCacheTime, "Time to cache directory entries for.")
commandDefintion.Flags().DurationVarP(&pollInterval, "poll-interval", "", pollInterval, "Time to wait between polling for changes. Must be smaller than dir-cache-time. Only on supported remotes. Set to 0 to disable.")
// mount options
commandDefintion.Flags().BoolVarP(&readOnly, "read-only", "", readOnly, "Mount read-only.")
commandDefintion.Flags().BoolVarP(&allowNonEmpty, "allow-non-empty", "", allowNonEmpty, "Allow mounting over a non-empty directory.")
commandDefintion.Flags().BoolVarP(&allowRoot, "allow-root", "", allowRoot, "Allow access to root user.")
commandDefintion.Flags().BoolVarP(&allowOther, "allow-other", "", allowOther, "Allow access to other users.")
commandDefintion.Flags().BoolVarP(&defaultPermissions, "default-permissions", "", defaultPermissions, "Makes kernel enforce access control based on the file mode.")
commandDefintion.Flags().BoolVarP(&writebackCache, "write-back-cache", "", writebackCache, "Makes kernel buffer writes before sending them to rclone. Without this, writethrough caching is used.")
commandDefintion.Flags().VarP(&maxReadAhead, "max-read-ahead", "", "The number of bytes that can be prefetched for sequential reads.")
commandDefintion.Flags().IntVarP(&umask, "umask", "", umask, "Override the permission bits set by the filesystem.")
commandDefintion.Flags().Uint32VarP(&uid, "uid", "", uid, "Override the uid field set by the filesystem.")
commandDefintion.Flags().Uint32VarP(&gid, "gid", "", gid, "Override the gid field set by the filesystem.")
//commandDefintion.Flags().BoolVarP(&foreground, "foreground", "", foreground, "Do not detach.")
}
var commandDefintion = &cobra.Command{
Use: "mount remote:path /path/to/mountpoint",
Short: `Mount the remote as a mountpoint. **EXPERIMENTAL**`,
Long: `
rclone mount allows Linux, FreeBSD and macOS to mount any of Rclone's
cloud storage systems as a file system with FUSE.
This is **EXPERIMENTAL** - use with care.
First set up your remote using ` + "`rclone config`" + `. Check it works with ` + "`rclone ls`" + ` etc.
Start the mount like this
rclone mount remote:path/to/files /path/to/local/mount
When the program ends, either via Ctrl+C or receiving a SIGINT or SIGTERM signal,
the mount is automatically stopped.
The umount operation can fail, for example when the mountpoint is busy.
When that happens, it is the user's responsibility to stop the mount manually with
# Linux
fusermount -u /path/to/local/mount
# OS X
umount /path/to/local/mount
### Limitations ###
This can only write files seqentially, it can only seek when reading.
This means that many applications won't work with their files on an
rclone mount.
The bucket based remotes (eg Swift, S3, Google Compute Storage, B2,
Hubic) won't work from the root - you will need to specify a bucket,
or a path within the bucket. So ` + "`swift:`" + ` won't work whereas
` + "`swift:bucket`" + ` will as will ` + "`swift:bucket/path`" + `.
None of these support the concept of directories, so empty
directories will have a tendency to disappear once they fall out of
the directory cache.
Only supported on Linux, FreeBSD and OS X at the moment.
### rclone mount vs rclone sync/copy ##
File systems expect things to be 100% reliable, whereas cloud storage
systems are a long way from 100% reliable. The rclone sync/copy
commands cope with this with lots of retries. However rclone mount
can't use retries in the same way without making local copies of the
uploads. This might happen in the future, but for the moment rclone
mount won't do that, so will be less reliable than the rclone command.
### Filters ###
Note that all the rclone filters can be used to select a subset of the
files to be visible in the mount.
### Directory Cache ###
Using the ` + "`--dir-cache-time`" + ` flag, you can set how long a
directory should be considered up to date and not refreshed from the
backend. Changes made locally in the mount may appear immediately or
invalidate the cache. However, changes done on the remote will only
be picked up once the cache expires.
Alternatively, you can send a ` + "`SIGHUP`" + ` signal to rclone for
it to flush all directory caches, regardless of how old they are.
Assuming only one rclone instance is running, you can reset the cache
like this:
kill -SIGHUP $(pidof rclone)
### Bugs ###
* All the remotes should work for read, but some may not for write
* those which need to know the size in advance won't - eg B2
* maybe should pass in size as -1 to mean work it out
* Or put in an an upload cache to cache the files on disk first
`,
Run: func(command *cobra.Command, args []string) {
cmd.CheckArgs(2, 2, command, args)
fdst := cmd.NewFsDst(args)
err := Mount(fdst, args[1])
if err != nil {
log.Fatalf("Fatal error: %v", err)
}
},
mountlib.NewMountCommand("mount", Mount)
}
// mountOptions configures the options from the command line flags
func mountOptions(device string) (options []fuse.MountOption) {
options = []fuse.MountOption{
fuse.MaxReadahead(uint32(maxReadAhead)),
fuse.MaxReadahead(uint32(mountlib.MaxReadAhead)),
fuse.Subtype("rclone"),
fuse.FSName(device), fuse.VolumeName(device),
fuse.NoAppleDouble(),
@ -174,24 +36,30 @@ func mountOptions(device string) (options []fuse.MountOption) {
// which is probably related to errors people are having
//fuse.WritebackCache(),
}
if allowNonEmpty {
if mountlib.AllowNonEmpty {
options = append(options, fuse.AllowNonEmptyMount())
}
if allowOther {
if mountlib.AllowOther {
options = append(options, fuse.AllowOther())
}
if allowRoot {
if mountlib.AllowRoot {
options = append(options, fuse.AllowRoot())
}
if defaultPermissions {
if mountlib.DefaultPermissions {
options = append(options, fuse.DefaultPermissions())
}
if readOnly {
if mountlib.ReadOnly {
options = append(options, fuse.ReadOnly())
}
if writebackCache {
if mountlib.WritebackCache {
options = append(options, fuse.WritebackCache())
}
if len(*mountlib.ExtraOptions) > 0 {
fs.Errorf(nil, "-o/--option not supported with this FUSE backend")
}
if len(*mountlib.ExtraOptions) > 0 {
fs.Errorf(nil, "--fuse-flag not supported with this FUSE backend")
}
return options
}
@ -239,22 +107,12 @@ func mount(f fs.Fs, mountpoint string) (*mountlib.FS, <-chan error, func() error
//
// If noModTime is set then it
func Mount(f fs.Fs, mountpoint string) error {
if debugFUSE {
if mountlib.DebugFUSE {
fuse.Debug = func(msg interface{}) {
fs.Debugf("fuse", "%v", msg)
}
}
// Set permissions
dirPerms = 0777 &^ os.FileMode(umask)
filePerms = 0666 &^ os.FileMode(umask)
// Show stats if the user has specifically requested them
if cmd.ShowStats() {
stopStats := cmd.StartStats()
defer close(stopStats)
}
// Mount it
FS, errChan, unmount, err := mount(f, mountpoint)
if err != nil {

2
cmd/mount/mount_test.go
View File

@ -8,7 +8,7 @@ import (
"github.com/ncw/rclone/cmd/mountlib/mounttest"
)
func TestMain(m *testing.M) { mounttest.TestMain(m, mount, dirPerms, filePerms) }
func TestMain(m *testing.M) { mounttest.TestMain(m, mount) }
func TestDirLs(t *testing.T) { mounttest.TestDirLs(t) }
func TestDirCreateAndRemoveDir(t *testing.T) { mounttest.TestDirCreateAndRemoveDir(t) }
func TestDirCreateAndRemoveFile(t *testing.T) { mounttest.TestDirCreateAndRemoveFile(t) }

40
cmd/mountlib/fs.go
View File

@ -53,15 +53,22 @@ func NewFS(f fs.Fs) *FS {
f: f,
}
if NoSeek {
fsys.noSeek = true
}
if NoChecksum {
fsys.noChecksum = true
}
if ReadOnly {
fsys.readOnly = true
}
fsys.dirCacheTime = DirCacheTime
fsys.root = newDir(fsys, f, fsDir)
return fsys
}
// SetDirCacheTime allows to set how long a directory listing is considered
// valid. Set to 0 always request a fresh version from the remote.
func (fsys *FS) SetDirCacheTime(dirCacheTime time.Duration) *FS {
fsys.dirCacheTime = dirCacheTime
if PollInterval > 0 {
fsys.PollChanges(PollInterval)
}
return fsys
}
@ -76,25 +83,6 @@ func (fsys *FS) PollChanges(pollInterval time.Duration) *FS {
return fsys
}
// NoSeek disables seeking of files
func (fsys *FS) NoSeek() *FS {
fsys.noSeek = true
return fsys
}
// NoChecksum disables checksum checking
func (fsys *FS) NoChecksum() *FS {
fsys.noChecksum = true
return fsys
}
// ReadOnly sets the fs into read only mode, returning EROFS for any
// write operations.
func (fsys *FS) ReadOnly() *FS {
fsys.readOnly = true
return fsys
}
// Root returns the root node
func (fsys *FS) Root() (*Dir, error) {
// fs.Debugf(fsys.f, "Root()")

172
cmd/mountlib/mount.go Normal file
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@ -0,0 +1,172 @@
package mountlib
// Globals
import (
"log"
"os"
"time"
"github.com/ncw/rclone/cmd"
"github.com/ncw/rclone/fs"
"github.com/spf13/cobra"
)
// Options set by command line flags
var (
NoModTime = false
NoChecksum = false
DebugFUSE = false
NoSeek = false
DirCacheTime = 5 * 60 * time.Second
PollInterval = time.Minute
// mount options
ReadOnly = false
AllowNonEmpty = false
AllowRoot = false
AllowOther = false
DefaultPermissions = false
WritebackCache = false
MaxReadAhead fs.SizeSuffix = 128 * 1024
Umask = 0
UID = ^uint32(0) // these values instruct WinFSP-FUSE to use the current user
GID = ^uint32(0) // overriden for non windows in mount_unix.go
// foreground = false
// default permissions for directories - modified by umask in Mount
DirPerms = os.FileMode(0777)
FilePerms = os.FileMode(0666)
ExtraOptions *[]string
ExtraFlags *[]string
)
// NewMountCommand makes a mount command with the given name and Mount function
func NewMountCommand(commandName string, Mount func(f fs.Fs, mountpoint string) error) *cobra.Command {
var commandDefintion = &cobra.Command{
Use: commandName + " remote:path /path/to/mountpoint",
Short: `Mount the remote as a mountpoint. **EXPERIMENTAL**`,
Long: `
rclone ` + commandName + ` allows Linux, FreeBSD, macOS and Windows to
mount any of Rclone's cloud storage systems as a file system with
FUSE.
This is **EXPERIMENTAL** - use with care.
First set up your remote using ` + "`rclone config`" + `. Check it works with ` + "`rclone ls`" + ` etc.
Start the mount like this
rclone ` + commandName + ` remote:path/to/files /path/to/local/mount
Or on Windows like this where X: is an unused drive letter
rclone ` + commandName + ` remote:path/to/files X:
When the program ends, either via Ctrl+C or receiving a SIGINT or SIGTERM signal,
the mount is automatically stopped.
The umount operation can fail, for example when the mountpoint is busy.
When that happens, it is the user's responsibility to stop the mount manually with
# Linux
fusermount -u /path/to/local/mount
# OS X
umount /path/to/local/mount
### Limitations ###
This can only write files seqentially, it can only seek when reading.
This means that many applications won't work with their files on an
rclone mount.
The bucket based remotes (eg Swift, S3, Google Compute Storage, B2,
Hubic) won't work from the root - you will need to specify a bucket,
or a path within the bucket. So ` + "`swift:`" + ` won't work whereas
` + "`swift:bucket`" + ` will as will ` + "`swift:bucket/path`" + `.
None of these support the concept of directories, so empty
directories will have a tendency to disappear once they fall out of
the directory cache.
Only supported on Linux, FreeBSD, OS X and Windows at the moment.
### rclone ` + commandName + ` vs rclone sync/copy ##
File systems expect things to be 100% reliable, whereas cloud storage
systems are a long way from 100% reliable. The rclone sync/copy
commands cope with this with lots of retries. However rclone ` + commandName + `
can't use retries in the same way without making local copies of the
uploads. This might happen in the future, but for the moment rclone
` + commandName + ` won't do that, so will be less reliable than the rclone command.
### Filters ###
Note that all the rclone filters can be used to select a subset of the
files to be visible in the mount.
### Directory Cache ###
Using the ` + "`--dir-cache-time`" + ` flag, you can set how long a
directory should be considered up to date and not refreshed from the
backend. Changes made locally in the mount may appear immediately or
invalidate the cache. However, changes done on the remote will only
be picked up once the cache expires.
Alternatively, you can send a ` + "`SIGHUP`" + ` signal to rclone for
it to flush all directory caches, regardless of how old they are.
Assuming only one rclone instance is running, you can reset the cache
like this:
kill -SIGHUP $(pidof rclone)
### Bugs ###
* All the remotes should work for read, but some may not for write
* those which need to know the size in advance won't - eg B2
* maybe should pass in size as -1 to mean work it out
* Or put in an an upload cache to cache the files on disk first
`,
Run: func(command *cobra.Command, args []string) {
cmd.CheckArgs(2, 2, command, args)
fdst := cmd.NewFsDst(args)
// Mask permissions
DirPerms = 0777 &^ os.FileMode(Umask)
FilePerms = 0666 &^ os.FileMode(Umask)
// Show stats if the user has specifically requested them
if cmd.ShowStats() {
stopStats := cmd.StartStats()
defer close(stopStats)
}
err := Mount(fdst, args[1])
if err != nil {
log.Fatalf("Fatal error: %v", err)
}
},
}
// Register the command
cmd.Root.AddCommand(commandDefintion)
// Add flags
flags := commandDefintion.Flags()
flags.BoolVarP(&NoModTime, "no-modtime", "", NoModTime, "Don't read/write the modification time (can speed things up).")
flags.BoolVarP(&NoChecksum, "no-checksum", "", NoChecksum, "Don't compare checksums on up/download.")
flags.BoolVarP(&DebugFUSE, "debug-fuse", "", DebugFUSE, "Debug the FUSE internals - needs -v.")
flags.BoolVarP(&NoSeek, "no-seek", "", NoSeek, "Don't allow seeking in files.")
flags.DurationVarP(&DirCacheTime, "dir-cache-time", "", DirCacheTime, "Time to cache directory entries for.")
flags.DurationVarP(&PollInterval, "poll-interval", "", PollInterval, "Time to wait between polling for changes. Must be smaller than dir-cache-time. Only on supported remotes. Set to 0 to disable.")
// mount options
flags.BoolVarP(&ReadOnly, "read-only", "", ReadOnly, "Mount read-only.")
flags.BoolVarP(&AllowNonEmpty, "allow-non-empty", "", AllowNonEmpty, "Allow mounting over a non-empty directory.")
flags.BoolVarP(&AllowRoot, "allow-root", "", AllowRoot, "Allow access to root user.")
flags.BoolVarP(&AllowOther, "allow-other", "", AllowOther, "Allow access to other users.")
flags.BoolVarP(&DefaultPermissions, "default-permissions", "", DefaultPermissions, "Makes kernel enforce access control based on the file mode.")
flags.BoolVarP(&WritebackCache, "write-back-cache", "", WritebackCache, "Makes kernel buffer writes before sending them to rclone. Without this, writethrough caching is used.")
flags.VarP(&MaxReadAhead, "max-read-ahead", "", "The number of bytes that can be prefetched for sequential reads.")
ExtraOptions = flags.StringArrayP("option", "o", []string{}, "Option for libfuse/WinFsp. Repeat if required.")
ExtraFlags = flags.StringArrayP("fuse-flag", "", []string{}, "Flags or arguments to be passed direct to libfuse/WinFsp. Repeat if required.")
//flags.BoolVarP(&foreground, "foreground", "", foreground, "Do not detach.")
platformFlags(flags)
return commandDefintion
}

11
cmd/mountlib/mount_non_unix.go Normal file
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@ -0,0 +1,11 @@
// +build !linux,!darwin,!freebsd
package mountlib
import (
"github.com/spf13/pflag"
)
// add any extra platform specific flags
func platformFlags(flags *pflag.FlagSet) {
}

19
cmd/mountlib/mount_unix.go Normal file
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@ -0,0 +1,19 @@
// +build linux darwin freebsd
package mountlib
import (
"github.com/spf13/pflag"
"golang.org/x/sys/unix"
)
// add any extra platform specific flags
func platformFlags(flags *pflag.FlagSet) {
flags.IntVarP(&Umask, "umask", "", Umask, "Override the permission bits set by the filesystem.")
Umask = unix.Umask(0) // read the umask
unix.Umask(Umask) // set it back to what it was
UID = uint32(unix.Geteuid())
GID = uint32(unix.Getegid())
flags.Uint32VarP(&UID, "uid", "", UID, "Override the uid field set by the filesystem.")
flags.Uint32VarP(&GID, "gid", "", GID, "Override the gid field set by the filesystem.")
}

27
cmd/mountlib/mounttest/fs.go
View File

@ -46,12 +46,10 @@ var (
)
// TestMain drives the tests
func TestMain(m *testing.M, fn MountFn, dirPerms, filePerms os.FileMode) {
func TestMain(m *testing.M, fn MountFn) {
mountFn = fn
flag.Parse()
run = newRun()
run.dirPerms = dirPerms
run.filePerms = filePerms
rc := m.Run()
run.Finalise()
os.Exit(rc)
@ -59,15 +57,14 @@ func TestMain(m *testing.M, fn MountFn, dirPerms, filePerms os.FileMode) {
// Run holds the remotes for a test run
type Run struct {
filesys *mountlib.FS
mountPath string
fremote fs.Fs
fremoteName string
cleanRemote func()
umountResult <-chan error
umountFn UnmountFn
skip bool
dirPerms, filePerms os.FileMode
filesys *mountlib.FS
mountPath string
fremote fs.Fs
fremoteName string
cleanRemote func()
umountResult <-chan error
umountFn UnmountFn
skip bool
}
// run holds the master Run data
@ -230,10 +227,10 @@ func (r *Run) readLocal(t *testing.T, dir dirMap, filepath string) {
if fi.IsDir() {
dir[name+"/"] = struct{}{}
r.readLocal(t, dir, name)
assert.Equal(t, r.dirPerms, fi.Mode().Perm())
assert.Equal(t, mountlib.DirPerms, fi.Mode().Perm())
} else {
dir[fmt.Sprintf("%s %d", name, fi.Size())] = struct{}{}
assert.Equal(t, r.filePerms, fi.Mode().Perm())
assert.Equal(t, mountlib.FilePerms, fi.Mode().Perm())
}
}
}
@ -315,5 +312,5 @@ func TestRoot(t *testing.T) {
fi, err := os.Lstat(run.mountPath)
require.NoError(t, err)
assert.True(t, fi.IsDir())
assert.Equal(t, fi.Mode().Perm(), run.dirPerms)
assert.Equal(t, fi.Mode().Perm(), mountlib.DirPerms)
}