diff options
| author | Chenggang Qin <chenggang.qcg@gmail.com> | 2018-08-16 16:27:14 -0700 |
|---|---|---|
| committer | Shentubot <shentubot@google.com> | 2018-08-16 16:28:14 -0700 |
| commit | aeec7a4c007ac53401e05bf72894a3b998eead95 (patch) | |
| tree | 60277fb6794708073c26f14624d0c351b9e83479 /pkg/sentry/fs/sys/sys.go | |
| parent | fbd5df9c6fec9119c8036bf5664a27afb35a08ec (diff) | |
fs: Support possible and online knobs for cpu
Some linux commands depend on /sys/devices/system/cpu/possible, such
as 'lscpu'.
Add 2 knobs for cpu:
/sys/devices/system/cpu/possible
/sys/devices/system/cpu/online
Both the values are '0 - Kernel.ApplicationCores()-1'.
Change-Id: Iabd8a4e559cbb630ed249686b92c22b4e7120663
PiperOrigin-RevId: 209070163
Diffstat (limited to 'pkg/sentry/fs/sys/sys.go')
| -rw-r--r-- | pkg/sentry/fs/sys/sys.go | 18 |
1 files changed, 15 insertions, 3 deletions
diff --git a/pkg/sentry/fs/sys/sys.go b/pkg/sentry/fs/sys/sys.go index b9b2fb4a1..b1c3d48eb 100644 --- a/pkg/sentry/fs/sys/sys.go +++ b/pkg/sentry/fs/sys/sys.go @@ -22,13 +22,25 @@ import ( "gvisor.googlesource.com/gvisor/pkg/sentry/usermem" ) +// sys is a root sys node. +// // +stateify savable -type dir struct { +type sys struct { ramfs.Dir } +func newFile(node fs.InodeOperations, msrc *fs.MountSource) *fs.Inode { + sattr := fs.StableAttr{ + DeviceID: sysfsDevice.DeviceID(), + InodeID: sysfsDevice.NextIno(), + BlockSize: usermem.PageSize, + Type: fs.SpecialFile, + } + return fs.NewInode(node, msrc, sattr) +} + func newDir(ctx context.Context, msrc *fs.MountSource, contents map[string]*fs.Inode) *fs.Inode { - d := &dir{} + d := &sys{} d.InitDir(ctx, contents, fs.RootOwner, fs.FilePermsFromMode(0555)) return fs.NewInode(d, msrc, fs.StableAttr{ DeviceID: sysfsDevice.DeviceID(), @@ -48,7 +60,7 @@ func New(ctx context.Context, msrc *fs.MountSource) *fs.Inode { "bus": newDir(ctx, msrc, nil), "class": newDir(ctx, msrc, nil), "dev": newDir(ctx, msrc, nil), - "devices": newDir(ctx, msrc, nil), + "devices": newDevicesDir(ctx, msrc), "firmware": newDir(ctx, msrc, nil), "fs": newDir(ctx, msrc, nil), "kernel": newDir(ctx, msrc, nil), |