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| author | Ian Lewis <ianmlewis@gmail.com> | 2020-08-17 21:44:31 -0400 |
|---|---|---|
| committer | Ian Lewis <ianmlewis@gmail.com> | 2020-08-17 21:44:31 -0400 |
| commit | ac324f646ee3cb7955b0b45a7453aeb9671cbdf1 (patch) | |
| tree | 0cbc5018e8807421d701d190dc20525726c7ca76 /pkg/sentry/socket/unix/io.go | |
| parent | 352ae1022ce19de28fc72e034cc469872ad79d06 (diff) | |
| parent | 6d0c5803d557d453f15ac6f683697eeb46dab680 (diff) | |
Merge branch 'master' into ip-forwarding
- Merges aleksej-paschenko's with HEAD
- Adds vfs2 support for ip_forward
Diffstat (limited to 'pkg/sentry/socket/unix/io.go')
| -rw-r--r-- | pkg/sentry/socket/unix/io.go | 17 |
1 files changed, 15 insertions, 2 deletions
diff --git a/pkg/sentry/socket/unix/io.go b/pkg/sentry/socket/unix/io.go index 2ec1a662d..129949990 100644 --- a/pkg/sentry/socket/unix/io.go +++ b/pkg/sentry/socket/unix/io.go @@ -15,8 +15,8 @@ package unix import ( - "gvisor.dev/gvisor/pkg/sentry/context" - "gvisor.dev/gvisor/pkg/sentry/safemem" + "gvisor.dev/gvisor/pkg/context" + "gvisor.dev/gvisor/pkg/safemem" "gvisor.dev/gvisor/pkg/sentry/socket/unix/transport" "gvisor.dev/gvisor/pkg/tcpip" ) @@ -83,6 +83,19 @@ type EndpointReader struct { ControlTrunc bool } +// Truncate calls RecvMsg on the endpoint without writing to a destination. +func (r *EndpointReader) Truncate() error { + // Ignore bytes read since it will always be zero. + _, ms, c, ct, err := r.Endpoint.RecvMsg(r.Ctx, [][]byte{}, r.Creds, r.NumRights, r.Peek, r.From) + r.Control = c + r.ControlTrunc = ct + r.MsgSize = ms + if err != nil { + return err.ToError() + } + return nil +} + // ReadToBlocks implements safemem.Reader.ReadToBlocks. func (r *EndpointReader) ReadToBlocks(dsts safemem.BlockSeq) (uint64, error) { return safemem.FromVecReaderFunc{func(bufs [][]byte) (int64, error) { |