diff options
Diffstat (limited to 'pkg/sentry/fsimpl/host/util.go')
-rw-r--r-- | pkg/sentry/fsimpl/host/util.go | 66 |
1 files changed, 0 insertions, 66 deletions
diff --git a/pkg/sentry/fsimpl/host/util.go b/pkg/sentry/fsimpl/host/util.go deleted file mode 100644 index d519feef5..000000000 --- a/pkg/sentry/fsimpl/host/util.go +++ /dev/null @@ -1,66 +0,0 @@ -// Copyright 2020 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 host - -import ( - "syscall" - - "golang.org/x/sys/unix" - "gvisor.dev/gvisor/pkg/abi/linux" - "gvisor.dev/gvisor/pkg/syserror" -) - -func toTimespec(ts linux.StatxTimestamp, omit bool) unix.Timespec { - if omit { - return unix.Timespec{ - Sec: 0, - Nsec: unix.UTIME_OMIT, - } - } - return unix.Timespec{ - Sec: int64(ts.Sec), - Nsec: int64(ts.Nsec), - } -} - -func unixToLinuxStatxTimestamp(ts unix.StatxTimestamp) linux.StatxTimestamp { - return linux.StatxTimestamp{Sec: ts.Sec, Nsec: ts.Nsec} -} - -func timespecToStatxTimestamp(ts unix.Timespec) linux.StatxTimestamp { - return linux.StatxTimestamp{Sec: int64(ts.Sec), Nsec: uint32(ts.Nsec)} -} - -// wouldBlock returns true for file types that can return EWOULDBLOCK -// for blocking operations, e.g. pipes, character devices, and sockets. -func wouldBlock(fileType uint32) bool { - return fileType == syscall.S_IFIFO || fileType == syscall.S_IFCHR || fileType == syscall.S_IFSOCK -} - -// canMap returns true if a file with fileType is allowed to be memory mapped. -// This is ported over from VFS1, but it's probably not the best way for us -// to check if a file can be memory mapped. -func canMap(fileType uint32) bool { - // TODO(gvisor.dev/issue/1672): Also allow "special files" to be mapped (see fs/host:canMap()). - // - // TODO(b/38213152): Some obscure character devices can be mapped. - return fileType == syscall.S_IFREG -} - -// isBlockError checks if an error is EAGAIN or EWOULDBLOCK. -// If so, they can be transformed into syserror.ErrWouldBlock. -func isBlockError(err error) bool { - return err == syserror.EAGAIN || err == syserror.EWOULDBLOCK -} |