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| author | gVisor bot <gvisor-bot@google.com> | 2020-08-04 01:19:54 +0000 |
|---|---|---|
| committer | gVisor bot <gvisor-bot@google.com> | 2020-08-04 01:19:54 +0000 |
| commit | 7ccf307eb664467b9d3e8e108458ae8ec85132c3 (patch) | |
| tree | 06825bf77222fc2cf773450a75be2628baa1ed47 /pkg/sentry/fsimpl/sys | |
| parent | 16f9c56724b27258aadc46e19c0537fd338811d6 (diff) | |
| parent | ad7c9fc4c3c027ea7ed211a6bdb35c38156280e6 (diff) | |
Merge release-20200622.1-316-gad7c9fc4c (automated)
Diffstat (limited to 'pkg/sentry/fsimpl/sys')
| -rw-r--r-- | pkg/sentry/fsimpl/sys/sys.go | 24 |
1 files changed, 16 insertions, 8 deletions
diff --git a/pkg/sentry/fsimpl/sys/sys.go b/pkg/sentry/fsimpl/sys/sys.go index f81b0c38f..0401726b6 100644 --- a/pkg/sentry/fsimpl/sys/sys.go +++ b/pkg/sentry/fsimpl/sys/sys.go @@ -30,6 +30,7 @@ import ( // Name is the default filesystem name. const Name = "sysfs" +const defaultSysDirMode = linux.FileMode(0755) // FilesystemType implements vfs.FilesystemType. type FilesystemType struct{} @@ -57,9 +58,6 @@ func (fsType FilesystemType) GetFilesystem(ctx context.Context, vfsObj *vfs.Virt devMinor: devMinor, } fs.VFSFilesystem().Init(vfsObj, &fsType, fs) - 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), @@ -70,11 +68,7 @@ func (fsType FilesystemType) GetFilesystem(ctx context.Context, vfsObj *vfs.Virt "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)), - }), + "cpu": cpuDir(ctx, fs, creds), }), }), "firmware": fs.newDir(creds, defaultSysDirMode, nil), @@ -86,6 +80,20 @@ func (fsType FilesystemType) GetFilesystem(ctx context.Context, vfsObj *vfs.Virt return fs.VFSFilesystem(), root.VFSDentry(), nil } +func cpuDir(ctx context.Context, fs *filesystem, creds *auth.Credentials) *kernfs.Dentry { + k := kernel.KernelFromContext(ctx) + maxCPUCores := k.ApplicationCores() + children := 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)), + } + for i := uint(0); i < maxCPUCores; i++ { + children[fmt.Sprintf("cpu%d", i)] = fs.newDir(creds, linux.FileMode(0555), nil) + } + return fs.newDir(creds, defaultSysDirMode, children) +} + // Release implements vfs.FilesystemImpl.Release. func (fs *filesystem) Release(ctx context.Context) { fs.Filesystem.VFSFilesystem().VirtualFilesystem().PutAnonBlockDevMinor(fs.devMinor) |