diff options
| author | Rahat Mahmood <rahat@google.com> | 2020-06-05 19:10:28 -0700 |
|---|---|---|
| committer | gVisor bot <gvisor-bot@google.com> | 2020-06-05 19:12:03 -0700 |
| commit | 21b6bc7280f68f43360a008ffd02a4f461ec9fc8 (patch) | |
| tree | 82a81d3d32681762d0bfa54776ba453349711734 /pkg/sentry/fsimpl/gofer | |
| parent | 527d08f6afdea1e142c76b8abb2266525a98c2ea (diff) | |
Implement mount(2) and umount2(2) for VFS2.
This is mostly syscall plumbing, VFS2 already implements the internals of
mounts. In addition to the syscall defintions, the following mount-related
mechanisms are updated:
- Implement MS_NOATIME for VFS2, but only for tmpfs and goferfs. The other VFS2
filesystems don't implement node-level timestamps yet.
- Implement the 'mode', 'uid' and 'gid' mount options for VFS2's tmpfs.
- Plumb mount namespace ownership, which is necessary for checking appropriate
capabilities during mount(2).
Updates #1035
PiperOrigin-RevId: 315035352
Diffstat (limited to 'pkg/sentry/fsimpl/gofer')
| -rw-r--r-- | pkg/sentry/fsimpl/gofer/time.go | 3 |
1 files changed, 3 insertions, 0 deletions
diff --git a/pkg/sentry/fsimpl/gofer/time.go b/pkg/sentry/fsimpl/gofer/time.go index 2608e7e1d..1d5aa82dc 100644 --- a/pkg/sentry/fsimpl/gofer/time.go +++ b/pkg/sentry/fsimpl/gofer/time.go @@ -38,6 +38,9 @@ func statxTimestampFromDentry(ns int64) linux.StatxTimestamp { // Preconditions: fs.interop != InteropModeShared. func (d *dentry) touchAtime(mnt *vfs.Mount) { + if mnt.Flags.NoATime { + return + } if err := mnt.CheckBeginWrite(); err != nil { return } |