90 lines
2.4 KiB
Go
90 lines
2.4 KiB
Go
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package nfs
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import (
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"bytes"
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"context"
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"github.com/go-git/go-billy/v5"
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"github.com/willscott/go-nfs-client/nfs/xdr"
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)
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const (
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// FSInfoPropertyLink does the FS support hard links?
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FSInfoPropertyLink = 0x0001
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// FSInfoPropertySymlink does the FS support soft links?
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FSInfoPropertySymlink = 0x0002
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// FSInfoPropertyHomogeneous does the FS need PATHCONF calls for each file
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FSInfoPropertyHomogeneous = 0x0008
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// FSInfoPropertyCanSetTime can the FS support setting access/mod times?
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FSInfoPropertyCanSetTime = 0x0010
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)
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func onFSInfo(ctx context.Context, w *response, userHandle Handler) error {
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roothandle, err := xdr.ReadOpaque(w.req.Body)
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if err != nil {
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return &NFSStatusError{NFSStatusInval, err}
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}
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fs, path, err := userHandle.FromHandle(roothandle)
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if err != nil {
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return &NFSStatusError{NFSStatusStale, err}
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}
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writer := bytes.NewBuffer([]byte{})
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if err := xdr.Write(writer, uint32(NFSStatusOk)); err != nil {
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return &NFSStatusError{NFSStatusServerFault, err}
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}
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if err := WritePostOpAttrs(writer, tryStat(ctx, fs, path)); err != nil {
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return &NFSStatusError{NFSStatusServerFault, err}
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}
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type fsinfores struct {
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Rtmax uint32
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Rtpref uint32
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Rtmult uint32
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Wtmax uint32
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Wtpref uint32
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Wtmult uint32
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Dtpref uint32
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Maxfilesize uint64
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TimeDelta uint64
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Properties uint32
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}
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res := fsinfores{
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Rtmax: 1 << 30,
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Rtpref: 1 << 30,
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Rtmult: 4096,
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Wtmax: 1 << 30,
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Wtpref: 1 << 30,
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Wtmult: 4096,
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Dtpref: 8192,
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Maxfilesize: 1 << 62, // wild guess. this seems big.
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TimeDelta: 1, // nanosecond precision.
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Properties: 0,
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}
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// TODO: these aren't great indications of support, really.
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// if _, ok := fs.(billy.Symlink); ok {
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// res.Properties |= FSInfoPropertyLink
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// res.Properties |= FSInfoPropertySymlink
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// }
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// TODO: if the nfs share spans multiple virtual mounts, may need
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// to support granular PATHINFO responses.
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res.Properties |= FSInfoPropertyHomogeneous
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// TODO: not a perfect indicator
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if CapabilityCheck(fs, billy.WriteCapability) {
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res.Properties |= FSInfoPropertyCanSetTime
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}
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// TODO: this whole struct should be specifiable by the userhandler.
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if err := xdr.Write(writer, res); err != nil {
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return &NFSStatusError{NFSStatusServerFault, err}
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}
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if err := w.Write(writer.Bytes()); err != nil {
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return &NFSStatusError{NFSStatusServerFault, err}
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}
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return nil
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}
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