mirror of
https://github.com/rclone/rclone
synced 2024-09-20 18:16:22 +02:00
b259f8b752
Normally mount/cmount use `-o ro` to get the kernel to mark the fs as
read only. However this is ignored by WinFsp, so in addition if
`--read-only` is in effect then return EROFS ("Read only File System")
from all methods which attempt to modify something.
101 lines
2.3 KiB
Go
101 lines
2.3 KiB
Go
// FUSE main Fs
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// +build linux darwin freebsd
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package mount
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import (
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"syscall"
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"bazil.org/fuse"
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fusefs "bazil.org/fuse/fs"
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"github.com/ncw/rclone/cmd/mountlib"
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"github.com/ncw/rclone/fs"
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"github.com/pkg/errors"
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"golang.org/x/net/context"
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)
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// FS represents the top level filing system
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type FS struct {
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*mountlib.FS
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f fs.Fs
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}
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// Check interface satistfied
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var _ fusefs.FS = (*FS)(nil)
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// NewFS makes a new FS
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func NewFS(f fs.Fs) *FS {
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fsys := &FS{
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FS: mountlib.NewFS(f),
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f: f,
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}
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if noSeek {
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fsys.FS.NoSeek()
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}
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if noChecksum {
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fsys.FS.NoChecksum()
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}
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if readOnly {
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fsys.FS.ReadOnly()
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}
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return fsys
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}
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// Root returns the root node
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func (f *FS) Root() (node fusefs.Node, err error) {
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defer fs.Trace("", "")("node=%+v, err=%v", &node, &err)
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root, err := f.FS.Root()
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if err != nil {
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return nil, translateError(err)
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}
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return &Dir{root}, nil
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}
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// Check interface satsified
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var _ fusefs.FSStatfser = (*FS)(nil)
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// Statfs is called to obtain file system metadata.
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// It should write that data to resp.
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func (f *FS) Statfs(ctx context.Context, req *fuse.StatfsRequest, resp *fuse.StatfsResponse) (err error) {
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defer fs.Trace("", "")("stat=%+v, err=%v", resp, &err)
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const blockSize = 4096
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const fsBlocks = (1 << 50) / blockSize
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resp.Blocks = fsBlocks // Total data blocks in file system.
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resp.Bfree = fsBlocks // Free blocks in file system.
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resp.Bavail = fsBlocks // Free blocks in file system if you're not root.
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resp.Files = 1E9 // Total files in file system.
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resp.Ffree = 1E9 // Free files in file system.
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resp.Bsize = blockSize // Block size
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resp.Namelen = 255 // Maximum file name length?
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resp.Frsize = blockSize // Fragment size, smallest addressable data size in the file system.
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return nil
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}
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// Translate errors from mountlib
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func translateError(err error) error {
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if err == nil {
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return nil
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}
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cause := errors.Cause(err)
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if mErr, ok := cause.(mountlib.Error); ok {
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switch mErr {
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case mountlib.OK:
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return nil
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case mountlib.ENOENT:
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return fuse.ENOENT
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case mountlib.ENOTEMPTY:
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return fuse.Errno(syscall.ENOTEMPTY)
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case mountlib.EEXIST:
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return fuse.EEXIST
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case mountlib.ESPIPE:
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return fuse.Errno(syscall.ESPIPE)
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case mountlib.EBADF:
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return fuse.Errno(syscall.EBADF)
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case mountlib.EROFS:
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return fuse.Errno(syscall.EROFS)
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}
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}
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return err
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}
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