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| author | Rahat Mahmood <rahat@google.com> | 2018-12-12 13:09:10 -0800 |
|---|---|---|
| committer | Shentubot <shentubot@google.com> | 2018-12-12 13:09:59 -0800 |
| commit | 75e39eaa74c65b6f7cfb95addb6ac0cbcc7d951a (patch) | |
| tree | 1a6b64491851e002727a08546f1168c89b9c32aa /pkg/sentry/mm/mm.go | |
| parent | a2c868a098fcb51dcdf629045c5f5c0f68c2766f (diff) | |
Pass information about map writableness to filesystems.
This is necessary to implement file seals for memfds.
PiperOrigin-RevId: 225239394
Change-Id: Ib3f1ab31385afc4b24e96cd81a05ef1bebbcbb70
Diffstat (limited to 'pkg/sentry/mm/mm.go')
| -rw-r--r-- | pkg/sentry/mm/mm.go | 4 |
1 files changed, 4 insertions, 0 deletions
diff --git a/pkg/sentry/mm/mm.go b/pkg/sentry/mm/mm.go index aab697f9e..b1e39e898 100644 --- a/pkg/sentry/mm/mm.go +++ b/pkg/sentry/mm/mm.go @@ -349,6 +349,10 @@ func (v *vma) loadRealPerms(b int) { } } +func (v *vma) isMappableAsWritable() bool { + return !v.private && v.maxPerms.Write +} + // pma represents a platform mapping area. // // +stateify savable |