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authorAdin Scannell <ascannell@google.com>2019-05-21 15:17:05 -0700
committerShentubot <shentubot@google.com>2019-05-21 15:18:12 -0700
commit9cdae51feca5cee9faa198161b92a0aeece52d6c (patch)
tree9a2a22b2e2c99f70505d9d8700bdc8dcac06e11d /pkg/abi/linux
parentadeb99709bda40e62363b229464b8ae3a90e237b (diff)
Add basic plumbing for splice and stub implementation.
This does not actually implement an efficient splice or sendfile. Rather, it adds a generic plumbing to the file internals so that this can be added. All file implementations use the stub fileutil.NoSplice implementation, which causes sendfile and splice to fall back to an internal copy. A basic splice system call interface is added, along with a test. PiperOrigin-RevId: 249335960 Change-Id: Ic5568be2af0a505c19e7aec66d5af2480ab0939b
Diffstat (limited to 'pkg/abi/linux')
-rw-r--r--pkg/abi/linux/BUILD1
-rw-r--r--pkg/abi/linux/splice.go23
2 files changed, 24 insertions, 0 deletions
diff --git a/pkg/abi/linux/BUILD b/pkg/abi/linux/BUILD
index fdf193873..96e8d4641 100644
--- a/pkg/abi/linux/BUILD
+++ b/pkg/abi/linux/BUILD
@@ -45,6 +45,7 @@ go_library(
"shm.go",
"signal.go",
"socket.go",
+ "splice.go",
"tcp.go",
"time.go",
"timer.go",
diff --git a/pkg/abi/linux/splice.go b/pkg/abi/linux/splice.go
new file mode 100644
index 000000000..650eb87e8
--- /dev/null
+++ b/pkg/abi/linux/splice.go
@@ -0,0 +1,23 @@
+// Copyright 2019 The gVisor Authors.
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+// http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+package linux
+
+// Constants for splice(2), sendfile(2) and tee(2).
+const (
+ SPLICE_F_MOVE = 1 << iota
+ SPLICE_F_NONBLOCK
+ SPLICE_F_MORE
+ SPLICE_F_GIFT
+)