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// Copyright (C) 2022 Luke Shumaker <lukeshu@lukeshu.com>
//
// SPDX-License-Identifier: GPL-2.0-or-later
package main
import (
"context"
"sync/atomic"
"github.com/datawire/dlib/dcontext"
"github.com/datawire/dlib/dgroup"
"github.com/datawire/dlib/dlog"
"github.com/jacobsa/fuse"
)
func Mount(ctx context.Context, mountpoint string, server fuse.Server, cfg *fuse.MountConfig) error {
grp := dgroup.NewGroup(ctx, dgroup.GroupConfig{
// Allow mountHandle.Join() returning to cause the
// "unmount" goroutine to quit.
ShutdownOnNonError: true,
})
mounted := uint32(1)
grp.Go("unmount", func(ctx context.Context) error {
<-ctx.Done()
var err error
var gotNil bool
// Keep retrying, because the FS might be busy.
for atomic.LoadUint32(&mounted) != 0 {
if _err := fuse.Unmount(mountpoint); _err == nil {
gotNil = true
} else if !gotNil {
err = _err
}
}
if gotNil {
return nil
}
return err
})
grp.Go("mount", func(ctx context.Context) error {
defer atomic.StoreUint32(&mounted, 0)
cfg.OpContext = ctx
cfg.ErrorLogger = dlog.StdLogger(ctx, dlog.LogLevelError)
cfg.DebugLogger = dlog.StdLogger(ctx, dlog.LogLevelDebug)
mountHandle, err := fuse.Mount(mountpoint, server, cfg)
if err != nil {
return err
}
dlog.Infof(ctx, "mounted %q", mountpoint)
return mountHandle.Join(dcontext.HardContext(ctx))
})
return grp.Wait()
}
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