diff options
| -rw-r--r-- | pkg/p9/local_server/BUILD | 14 | ||||
| -rw-r--r-- | pkg/p9/local_server/local_server.go | 353 |
2 files changed, 0 insertions, 367 deletions
diff --git a/pkg/p9/local_server/BUILD b/pkg/p9/local_server/BUILD deleted file mode 100644 index aa6db186c..000000000 --- a/pkg/p9/local_server/BUILD +++ /dev/null @@ -1,14 +0,0 @@ -load("@io_bazel_rules_go//go:def.bzl", "go_binary") - -package(licenses = ["notice"]) - -go_binary( - name = "local_server", - srcs = ["local_server.go"], - deps = [ - "//pkg/fd", - "//pkg/log", - "//pkg/p9", - "//pkg/unet", - ], -) diff --git a/pkg/p9/local_server/local_server.go b/pkg/p9/local_server/local_server.go deleted file mode 100644 index 905188aaa..000000000 --- a/pkg/p9/local_server/local_server.go +++ /dev/null @@ -1,353 +0,0 @@ -// Copyright 2018 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. - -// Binary local_server provides a local 9P2000.L server for the p9 package. -// -// To use, first start the server: -// local_server /tmp/my_bind_addr -// -// Then, connect using the Linux 9P filesystem: -// mount -t 9p -o trans=unix /tmp/my_bind_addr /mnt -// -// This package also serves as an examplar. -package main - -import ( - "os" - "path" - "syscall" - - "gvisor.dev/gvisor/pkg/fd" - "gvisor.dev/gvisor/pkg/log" - "gvisor.dev/gvisor/pkg/p9" - "gvisor.dev/gvisor/pkg/unet" -) - -// local wraps a local file. -type local struct { - p9.DefaultWalkGetAttr - - path string - file *os.File -} - -// info constructs a QID for this file. -func (l *local) info() (p9.QID, os.FileInfo, error) { - var ( - qid p9.QID - fi os.FileInfo - err error - ) - - // Stat the file. - if l.file != nil { - fi, err = l.file.Stat() - } else { - fi, err = os.Lstat(l.path) - } - if err != nil { - log.Warningf("error stating %#v: %v", l, err) - return qid, nil, err - } - - // Construct the QID type. - qid.Type = p9.ModeFromOS(fi.Mode()).QIDType() - - // Save the path from the Ino. - qid.Path = fi.Sys().(*syscall.Stat_t).Ino - return qid, fi, nil -} - -// Attach implements p9.Attacher.Attach. -func (l *local) Attach() (p9.File, error) { - return &local{path: "/"}, nil -} - -// Walk implements p9.File.Walk. -func (l *local) Walk(names []string) ([]p9.QID, p9.File, error) { - var qids []p9.QID - last := &local{path: l.path} - for _, name := range names { - c := &local{path: path.Join(last.path, name)} - qid, _, err := c.info() - if err != nil { - return nil, nil, err - } - qids = append(qids, qid) - last = c - } - return qids, last, nil -} - -// StatFS implements p9.File.StatFS. -// -// Not implemented. -func (l *local) StatFS() (p9.FSStat, error) { - return p9.FSStat{}, syscall.ENOSYS -} - -// FSync implements p9.File.FSync. -func (l *local) FSync() error { - return l.file.Sync() -} - -// GetAttr implements p9.File.GetAttr. -// -// Not fully implemented. -func (l *local) GetAttr(req p9.AttrMask) (p9.QID, p9.AttrMask, p9.Attr, error) { - qid, fi, err := l.info() - if err != nil { - return qid, p9.AttrMask{}, p9.Attr{}, err - } - - stat := fi.Sys().(*syscall.Stat_t) - attr := p9.Attr{ - Mode: p9.FileMode(stat.Mode), - UID: p9.UID(stat.Uid), - GID: p9.GID(stat.Gid), - NLink: stat.Nlink, - RDev: stat.Rdev, - Size: uint64(stat.Size), - BlockSize: uint64(stat.Blksize), - Blocks: uint64(stat.Blocks), - ATimeSeconds: uint64(stat.Atim.Sec), - ATimeNanoSeconds: uint64(stat.Atim.Nsec), - MTimeSeconds: uint64(stat.Mtim.Sec), - MTimeNanoSeconds: uint64(stat.Mtim.Nsec), - CTimeSeconds: uint64(stat.Ctim.Sec), - CTimeNanoSeconds: uint64(stat.Ctim.Nsec), - } - valid := p9.AttrMask{ - Mode: true, - UID: true, - GID: true, - NLink: true, - RDev: true, - Size: true, - Blocks: true, - ATime: true, - MTime: true, - CTime: true, - } - - return qid, valid, attr, nil -} - -// SetAttr implements p9.File.SetAttr. -// -// Not implemented. -func (l *local) SetAttr(valid p9.SetAttrMask, attr p9.SetAttr) error { - return syscall.ENOSYS -} - -// Remove implements p9.File.Remove. -// -// Not implemented. -func (l *local) Remove() error { - return syscall.ENOSYS -} - -// Rename implements p9.File.Rename. -// -// Not implemented. -func (l *local) Rename(directory p9.File, name string) error { - return syscall.ENOSYS -} - -// Close implements p9.File.Close. -func (l *local) Close() error { - if l.file != nil { - return l.file.Close() - } - return nil -} - -// Open implements p9.File.Open. -func (l *local) Open(mode p9.OpenFlags) (*fd.FD, p9.QID, uint32, error) { - qid, _, err := l.info() - if err != nil { - return nil, qid, 0, err - } - - // Do the actual open. - f, err := os.OpenFile(l.path, int(mode), 0) - if err != nil { - return nil, qid, 0, err - } - l.file = f - - // Note: we don't send the local file for this server. - return nil, qid, 4096, nil -} - -// Read implements p9.File.Read. -func (l *local) ReadAt(p []byte, offset uint64) (int, error) { - return l.file.ReadAt(p, int64(offset)) -} - -// Write implements p9.File.Write. -func (l *local) WriteAt(p []byte, offset uint64) (int, error) { - return l.file.WriteAt(p, int64(offset)) -} - -// Create implements p9.File.Create. -func (l *local) Create(name string, mode p9.OpenFlags, permissions p9.FileMode, _ p9.UID, _ p9.GID) (*fd.FD, p9.File, p9.QID, uint32, error) { - f, err := os.OpenFile(l.path, int(mode)|syscall.O_CREAT|syscall.O_EXCL, os.FileMode(permissions)) - if err != nil { - return nil, nil, p9.QID{}, 0, err - } - - l2 := &local{path: path.Join(l.path, name), file: f} - qid, _, err := l2.info() - if err != nil { - l2.Close() - return nil, nil, p9.QID{}, 0, err - } - - return nil, l2, qid, 4096, nil -} - -// Mkdir implements p9.File.Mkdir. -// -// Not properly implemented. -func (l *local) Mkdir(name string, permissions p9.FileMode, _ p9.UID, _ p9.GID) (p9.QID, error) { - if err := os.Mkdir(path.Join(l.path, name), os.FileMode(permissions)); err != nil { - return p9.QID{}, err - } - - // Blank QID. - return p9.QID{}, nil -} - -// Symlink implements p9.File.Symlink. -// -// Not properly implemented. -func (l *local) Symlink(oldname string, newname string, _ p9.UID, _ p9.GID) (p9.QID, error) { - if err := os.Symlink(oldname, path.Join(l.path, newname)); err != nil { - return p9.QID{}, err - } - - // Blank QID. - return p9.QID{}, nil -} - -// Link implements p9.File.Link. -// -// Not properly implemented. -func (l *local) Link(target p9.File, newname string) error { - return os.Link(target.(*local).path, path.Join(l.path, newname)) -} - -// Mknod implements p9.File.Mknod. -// -// Not implemented. -func (l *local) Mknod(name string, mode p9.FileMode, major uint32, minor uint32, _ p9.UID, _ p9.GID) (p9.QID, error) { - return p9.QID{}, syscall.ENOSYS -} - -// RenameAt implements p9.File.RenameAt. -// -// Not implemented. -func (l *local) RenameAt(oldname string, newdir p9.File, newname string) error { - return syscall.ENOSYS -} - -// UnlinkAt implements p9.File.UnlinkAt. -// -// Not implemented. -func (l *local) UnlinkAt(name string, flags uint32) error { - return syscall.ENOSYS -} - -// Readdir implements p9.File.Readdir. -func (l *local) Readdir(offset uint64, count uint32) ([]p9.Dirent, error) { - // We only do *all* dirents in single shot. - const maxDirentBuffer = 1024 * 1024 - buf := make([]byte, maxDirentBuffer) - n, err := syscall.ReadDirent(int(l.file.Fd()), buf) - if err != nil { - // Return zero entries. - return nil, nil - } - - // Parse the entries; note that we read up to offset+count here. - _, newCount, newNames := syscall.ParseDirent(buf[:n], int(offset)+int(count), nil) - var dirents []p9.Dirent - for i := int(offset); i >= 0 && i < newCount; i++ { - entry := local{path: path.Join(l.path, newNames[i])} - qid, _, err := entry.info() - if err != nil { - continue - } - dirents = append(dirents, p9.Dirent{ - QID: qid, - Type: qid.Type, - Name: newNames[i], - Offset: uint64(i + 1), - }) - } - - return dirents, nil -} - -// Readlink implements p9.File.Readlink. -// -// Not properly implemented. -func (l *local) Readlink() (string, error) { - return os.Readlink(l.path) -} - -// Flush implements p9.File.Flush. -func (l *local) Flush() error { - return nil -} - -// Connect implements p9.File.Connect. -func (l *local) Connect(p9.ConnectFlags) (*fd.FD, error) { - return nil, syscall.ECONNREFUSED -} - -// Renamed implements p9.File.Renamed. -func (l *local) Renamed(parent p9.File, newName string) { - l.path = path.Join(parent.(*local).path, newName) -} - -// Allocate implements p9.File.Allocate. -func (l *local) Allocate(mode p9.AllocateMode, offset, length uint64) error { - return syscall.Fallocate(int(l.file.Fd()), mode.ToLinux(), int64(offset), int64(length)) -} - -func main() { - log.SetLevel(log.Debug) - - if len(os.Args) != 2 { - log.Warningf("usage: %s <bind-addr>", os.Args[0]) - os.Exit(1) - } - - // Bind and listen on the socket. - serverSocket, err := unet.BindAndListen(os.Args[1], false) - if err != nil { - log.Warningf("err binding: %v", err) - os.Exit(1) - } - - // Run the server. - s := p9.NewServer(&local{}) - s.Serve(serverSocket) -} - -var ( - _ p9.File = &local{} -) |