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-rw-r--r--pkg/sentry/fsimpl/sys/BUILD35
-rw-r--r--pkg/sentry/fsimpl/sys/sys.go124
-rw-r--r--pkg/sentry/fsimpl/sys/sys_test.go90
3 files changed, 0 insertions, 249 deletions
diff --git a/pkg/sentry/fsimpl/sys/BUILD b/pkg/sentry/fsimpl/sys/BUILD
deleted file mode 100644
index ee3c842bd..000000000
--- a/pkg/sentry/fsimpl/sys/BUILD
+++ /dev/null
@@ -1,35 +0,0 @@
-load("//tools/go_stateify:defs.bzl", "go_library")
-load("@io_bazel_rules_go//go:def.bzl", "go_test")
-
-package(licenses = ["notice"])
-
-go_library(
- name = "sys",
- srcs = [
- "sys.go",
- ],
- importpath = "gvisor.dev/gvisor/pkg/sentry/fsimpl/sys",
- deps = [
- "//pkg/abi/linux",
- "//pkg/sentry/context",
- "//pkg/sentry/fsimpl/kernfs",
- "//pkg/sentry/kernel",
- "//pkg/sentry/kernel/auth",
- "//pkg/sentry/vfs",
- "//pkg/syserror",
- ],
-)
-
-go_test(
- name = "sys_test",
- srcs = ["sys_test.go"],
- deps = [
- ":sys",
- "//pkg/abi/linux",
- "//pkg/sentry/fsimpl/testutil",
- "//pkg/sentry/kernel",
- "//pkg/sentry/kernel/auth",
- "//pkg/sentry/vfs",
- "@com_github_google_go-cmp//cmp:go_default_library",
- ],
-)
diff --git a/pkg/sentry/fsimpl/sys/sys.go b/pkg/sentry/fsimpl/sys/sys.go
deleted file mode 100644
index 1305ad01d..000000000
--- a/pkg/sentry/fsimpl/sys/sys.go
+++ /dev/null
@@ -1,124 +0,0 @@
-// 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 sys implements sysfs.
-package sys
-
-import (
- "bytes"
- "fmt"
-
- "gvisor.dev/gvisor/pkg/abi/linux"
- "gvisor.dev/gvisor/pkg/sentry/context"
- "gvisor.dev/gvisor/pkg/sentry/fsimpl/kernfs"
- "gvisor.dev/gvisor/pkg/sentry/kernel"
- "gvisor.dev/gvisor/pkg/sentry/kernel/auth"
- "gvisor.dev/gvisor/pkg/sentry/vfs"
- "gvisor.dev/gvisor/pkg/syserror"
-)
-
-// FilesystemType implements vfs.FilesystemType.
-type FilesystemType struct{}
-
-// filesystem implements vfs.FilesystemImpl.
-type filesystem struct {
- kernfs.Filesystem
-}
-
-// GetFilesystem implements vfs.FilesystemType.GetFilesystem.
-func (FilesystemType) GetFilesystem(ctx context.Context, vfsObj *vfs.VirtualFilesystem, creds *auth.Credentials, source string, opts vfs.GetFilesystemOptions) (*vfs.Filesystem, *vfs.Dentry, error) {
- fs := &filesystem{}
- fs.Filesystem.Init(vfsObj)
- k := kernel.KernelFromContext(ctx)
- maxCPUCores := k.ApplicationCores()
- defaultSysDirMode := linux.FileMode(0755)
-
- root := fs.newDir(creds, defaultSysDirMode, map[string]*kernfs.Dentry{
- "block": fs.newDir(creds, defaultSysDirMode, nil),
- "bus": fs.newDir(creds, defaultSysDirMode, nil),
- "class": fs.newDir(creds, defaultSysDirMode, map[string]*kernfs.Dentry{
- "power_supply": fs.newDir(creds, defaultSysDirMode, nil),
- }),
- "dev": fs.newDir(creds, defaultSysDirMode, nil),
- "devices": fs.newDir(creds, defaultSysDirMode, map[string]*kernfs.Dentry{
- "system": fs.newDir(creds, defaultSysDirMode, map[string]*kernfs.Dentry{
- "cpu": fs.newDir(creds, defaultSysDirMode, map[string]*kernfs.Dentry{
- "online": fs.newCPUFile(creds, maxCPUCores, linux.FileMode(0444)),
- "possible": fs.newCPUFile(creds, maxCPUCores, linux.FileMode(0444)),
- "present": fs.newCPUFile(creds, maxCPUCores, linux.FileMode(0444)),
- }),
- }),
- }),
- "firmware": fs.newDir(creds, defaultSysDirMode, nil),
- "fs": fs.newDir(creds, defaultSysDirMode, nil),
- "kernel": fs.newDir(creds, defaultSysDirMode, nil),
- "module": fs.newDir(creds, defaultSysDirMode, nil),
- "power": fs.newDir(creds, defaultSysDirMode, nil),
- })
- return fs.VFSFilesystem(), root.VFSDentry(), nil
-}
-
-// dir implements kernfs.Inode.
-type dir struct {
- kernfs.InodeAttrs
- kernfs.InodeNoDynamicLookup
- kernfs.InodeNotSymlink
- kernfs.InodeDirectoryNoNewChildren
-
- kernfs.OrderedChildren
- dentry kernfs.Dentry
-}
-
-func (fs *filesystem) newDir(creds *auth.Credentials, mode linux.FileMode, contents map[string]*kernfs.Dentry) *kernfs.Dentry {
- d := &dir{}
- d.InodeAttrs.Init(creds, fs.NextIno(), linux.ModeDirectory|0755)
- d.OrderedChildren.Init(kernfs.OrderedChildrenOptions{})
- d.dentry.Init(d)
-
- d.IncLinks(d.OrderedChildren.Populate(&d.dentry, contents))
-
- return &d.dentry
-}
-
-// SetStat implements kernfs.Inode.SetStat.
-func (d *dir) SetStat(fs *vfs.Filesystem, opts vfs.SetStatOptions) error {
- return syserror.EPERM
-}
-
-// Open implements kernfs.Inode.Open.
-func (d *dir) Open(rp *vfs.ResolvingPath, vfsd *vfs.Dentry, flags uint32) (*vfs.FileDescription, error) {
- fd := &kernfs.GenericDirectoryFD{}
- fd.Init(rp.Mount(), vfsd, &d.OrderedChildren, flags)
- return fd.VFSFileDescription(), nil
-}
-
-// cpuFile implements kernfs.Inode.
-type cpuFile struct {
- kernfs.DynamicBytesFile
- maxCores uint
-}
-
-// Generate implements vfs.DynamicBytesSource.Generate.
-func (c *cpuFile) Generate(ctx context.Context, buf *bytes.Buffer) error {
- fmt.Fprintf(buf, "0-%d", c.maxCores-1)
- return nil
-}
-
-func (fs *filesystem) newCPUFile(creds *auth.Credentials, maxCores uint, mode linux.FileMode) *kernfs.Dentry {
- c := &cpuFile{maxCores: maxCores}
- c.DynamicBytesFile.Init(creds, fs.NextIno(), c, mode)
- d := &kernfs.Dentry{}
- d.Init(c)
- return d
-}
diff --git a/pkg/sentry/fsimpl/sys/sys_test.go b/pkg/sentry/fsimpl/sys/sys_test.go
deleted file mode 100644
index 60a1634a9..000000000
--- a/pkg/sentry/fsimpl/sys/sys_test.go
+++ /dev/null
@@ -1,90 +0,0 @@
-// 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 sys_test
-
-import (
- "fmt"
- "testing"
-
- "github.com/google/go-cmp/cmp"
- "gvisor.dev/gvisor/pkg/abi/linux"
- "gvisor.dev/gvisor/pkg/sentry/fsimpl/sys"
- "gvisor.dev/gvisor/pkg/sentry/fsimpl/testutil"
- "gvisor.dev/gvisor/pkg/sentry/kernel"
- "gvisor.dev/gvisor/pkg/sentry/kernel/auth"
- "gvisor.dev/gvisor/pkg/sentry/vfs"
-)
-
-func newTestSystem(t *testing.T) *testutil.System {
- k, err := testutil.Boot()
- if err != nil {
- t.Fatalf("Failed to create test kernel: %v", err)
- }
- ctx := k.SupervisorContext()
- creds := auth.CredentialsFromContext(ctx)
- v := vfs.New()
- v.MustRegisterFilesystemType("sysfs", sys.FilesystemType{}, &vfs.RegisterFilesystemTypeOptions{
- AllowUserMount: true,
- })
-
- mns, err := v.NewMountNamespace(ctx, creds, "", "sysfs", &vfs.GetFilesystemOptions{})
- if err != nil {
- t.Fatalf("Failed to create new mount namespace: %v", err)
- }
- return testutil.NewSystem(ctx, t, v, mns)
-}
-
-func TestReadCPUFile(t *testing.T) {
- s := newTestSystem(t)
- defer s.Destroy()
- k := kernel.KernelFromContext(s.Ctx)
- maxCPUCores := k.ApplicationCores()
-
- expected := fmt.Sprintf("0-%d", maxCPUCores-1)
-
- for _, fname := range []string{"online", "possible", "present"} {
- pop := s.PathOpAtRoot(fmt.Sprintf("devices/system/cpu/%s", fname))
- fd, err := s.VFS.OpenAt(s.Ctx, s.Creds, &pop, &vfs.OpenOptions{})
- if err != nil {
- t.Fatalf("OpenAt(pop:%+v) = %+v failed: %v", pop, fd, err)
- }
- defer fd.DecRef()
- content, err := s.ReadToEnd(fd)
- if err != nil {
- t.Fatalf("Read failed: %v", err)
- }
- if diff := cmp.Diff(expected, content); diff != "" {
- t.Fatalf("Read returned unexpected data:\n--- want\n+++ got\n%v", diff)
- }
- }
-}
-
-func TestSysRootContainsExpectedEntries(t *testing.T) {
- s := newTestSystem(t)
- defer s.Destroy()
- pop := s.PathOpAtRoot("/")
- s.AssertDirectoryContains(&pop, map[string]testutil.DirentType{
- "block": linux.DT_DIR,
- "bus": linux.DT_DIR,
- "class": linux.DT_DIR,
- "dev": linux.DT_DIR,
- "devices": linux.DT_DIR,
- "firmware": linux.DT_DIR,
- "fs": linux.DT_DIR,
- "kernel": linux.DT_DIR,
- "module": linux.DT_DIR,
- "power": linux.DT_DIR,
- })
-}
generated by cgit v1.2.3 (git 2.39.1) at 2024-12-26 13:06:07 +0000