84 lines
2.9 KiB
Go
84 lines
2.9 KiB
Go
// Copyright 2018 Google LLC
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//
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// Licensed under the Apache License, Version 2.0 (the "License");
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// you may not use this file except in compliance with the License.
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// You may obtain a copy of the License at
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//
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// http://www.apache.org/licenses/LICENSE-2.0
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//
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// Unless required by applicable law or agreed to in writing, software
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// distributed under the License is distributed on an "AS IS" BASIS,
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// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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// See the License for the specific language governing permissions and
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// limitations under the License.
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package ramfs
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import (
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"gvisor.googlesource.com/gvisor/pkg/abi/linux"
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"gvisor.googlesource.com/gvisor/pkg/sentry/context"
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"gvisor.googlesource.com/gvisor/pkg/sentry/fs"
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"gvisor.googlesource.com/gvisor/pkg/sentry/fs/fsutil"
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"gvisor.googlesource.com/gvisor/pkg/sentry/socket/unix/transport"
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"gvisor.googlesource.com/gvisor/pkg/waiter"
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)
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// Socket represents a socket.
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//
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// +stateify savable
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type Socket struct {
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fsutil.InodeGenericChecker `state:"nosave"`
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fsutil.InodeNoopRelease `state:"nosave"`
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fsutil.InodeNoopWriteOut `state:"nosave"`
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fsutil.InodeNotDirectory `state:"nosave"`
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fsutil.InodeNotMappable `state:"nosave"`
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fsutil.InodeNotSymlink `state:"nosave"`
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fsutil.InodeNotTruncatable `state:"nosave"`
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fsutil.InodeVirtual `state:"nosave"`
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fsutil.InodeSimpleAttributes
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fsutil.InodeSimpleExtendedAttributes
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// ep is the bound endpoint.
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ep transport.BoundEndpoint
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}
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var _ fs.InodeOperations = (*Socket)(nil)
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// NewSocket returns a new Socket.
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func NewSocket(ctx context.Context, ep transport.BoundEndpoint, owner fs.FileOwner, perms fs.FilePermissions) *Socket {
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return &Socket{
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InodeSimpleAttributes: fsutil.NewInodeSimpleAttributes(ctx, owner, perms, linux.SOCKFS_MAGIC),
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ep: ep,
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}
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}
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// BoundEndpoint returns the socket data.
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func (s *Socket) BoundEndpoint(*fs.Inode, string) transport.BoundEndpoint {
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// ramfs only supports stored sentry internal sockets. Only gofer sockets
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// care about the path argument.
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return s.ep
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}
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// GetFile implements fs.FileOperations.GetFile.
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func (s *Socket) GetFile(ctx context.Context, dirent *fs.Dirent, flags fs.FileFlags) (*fs.File, error) {
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return fs.NewFile(ctx, dirent, flags, &socketFileOperations{}), nil
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}
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// +stateify savable
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type socketFileOperations struct {
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waiter.AlwaysReady `state:"nosave"`
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fsutil.FileNoIoctl `state:"nosave"`
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fsutil.FileNoMMap `state:"nosave"`
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fsutil.FileNoopFlush `state:"nosave"`
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fsutil.FileNoopFsync `state:"nosave"`
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fsutil.FileNoopRelease `state:"nosave"`
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fsutil.FileNoRead `state:"nosave"`
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fsutil.FileNoSeek `state:"nosave"`
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fsutil.FileNotDirReaddir `state:"nosave"`
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fsutil.FileNoWrite `state:"nosave"`
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fsutil.FileUseInodeUnstableAttr `state:"nosave"`
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}
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var _ fs.FileOperations = (*socketFileOperations)(nil)
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