fc32fee4ad
This flag allows the attribute caching in the kernel to be controlled. The default is 0s - no caching - which is recommended for filesystems which can change outside the control of the kernel. Previously this was at the default meaning it was 60s for mount and 1s for cmount. This showed strange effects when files changed on the remote not via the kernel. For instance Caddy would serve corrupted files for a while when serving from an rclone mount when a file changed on the remote.
97 lines
2.4 KiB
Go
97 lines
2.4 KiB
Go
// +build linux darwin freebsd
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package mount
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import (
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"os"
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"time"
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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/log"
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"github.com/ncw/rclone/vfs"
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"golang.org/x/net/context"
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)
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// File represents a file
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type File struct {
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*vfs.File
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}
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// Check interface satisfied
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var _ fusefs.Node = (*File)(nil)
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// Attr fills out the attributes for the file
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func (f *File) Attr(ctx context.Context, a *fuse.Attr) (err error) {
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defer log.Trace(f, "")("a=%+v, err=%v", a, &err)
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a.Valid = mountlib.AttrTimeout
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modTime := f.File.ModTime()
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Size := uint64(f.File.Size())
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Blocks := (Size + 511) / 512
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a.Gid = f.VFS().Opt.GID
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a.Uid = f.VFS().Opt.UID
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a.Mode = f.VFS().Opt.FilePerms
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a.Size = Size
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a.Atime = modTime
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a.Mtime = modTime
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a.Ctime = modTime
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a.Crtime = modTime
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a.Blocks = Blocks
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return nil
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}
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// Check interface satisfied
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var _ fusefs.NodeSetattrer = (*File)(nil)
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// Setattr handles attribute changes from FUSE. Currently supports ModTime and Size only
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func (f *File) Setattr(ctx context.Context, req *fuse.SetattrRequest, resp *fuse.SetattrResponse) (err error) {
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defer log.Trace(f, "a=%+v", req)("err=%v", &err)
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if !f.VFS().Opt.NoModTime {
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if req.Valid.Mtime() {
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err = f.File.SetModTime(req.Mtime)
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} else if req.Valid.MtimeNow() {
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err = f.File.SetModTime(time.Now())
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}
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}
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if req.Valid.Size() {
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err = f.File.Truncate(int64(req.Size))
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}
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return translateError(err)
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}
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// Check interface satisfied
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var _ fusefs.NodeOpener = (*File)(nil)
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// Open the file for read or write
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func (f *File) Open(ctx context.Context, req *fuse.OpenRequest, resp *fuse.OpenResponse) (fh fusefs.Handle, err error) {
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defer log.Trace(f, "flags=%v", req.Flags)("fh=%v, err=%v", &fh, &err)
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// fuse flags are based off syscall flags as are os flags, so
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// should be compatible
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//
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// we seem to be missing O_CREATE here so add it in to allow
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// file creation
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handle, err := f.File.Open(int(req.Flags) | os.O_CREATE)
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if err != nil {
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return nil, translateError(err)
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}
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// See if seeking is supported and set FUSE hint accordingly
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if _, err = handle.Seek(0, 1); err != nil {
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resp.Flags |= fuse.OpenNonSeekable
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}
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return &FileHandle{handle}, nil
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}
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// Check interface satisfied
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var _ fusefs.NodeFsyncer = (*File)(nil)
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// Fsync the file
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//
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// Note that we don't do anything except return OK
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func (f *File) Fsync(ctx context.Context, req *fuse.FsyncRequest) (err error) {
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defer log.Trace(f, "")("err=%v", &err)
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return nil
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}
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