Say, foo_type was introduced in 29.0 sepolicy and is in 29.0.ignore.cil.
Also assume (typeattributeset foo_type_29_0 (foo_type bar_type))
Make sure that above mapping is not expanded into 28.0.cil, 27.0.cil, etc.
Test: m selinux_policy
Test: build aosp/1199739
Change-Id: Ib564431ab67f555ea1ae650dc31a68121e9c6d84
Say, foo_attribute is removed in 30 API. We need to preserve
typeattribute declaration in 29.0.cil, 28.0.cil, etc for backwards
compatibility.
(typeattribute binder_in_vendor_violators)
Automatically expand these typeattribute declaration into older map
files, so that we only need to update 29.0.cil.
Test: remove binder_in_vendor_violators; only 29.0.cil map needs to be
updated
Change-Id: Ifa7767d771f802e122b2f1ff6faf198ba2afa42e
New maintenance scheme for mapping files:
Say, V is the current SELinux platform version, then at any point in time we
only maintain (V->V-1) mapping. (V->V-n) map is constructed from top (V->V-n+1)
and bottom (V-n+1->V-n) without changes to previously maintained mapping files.
Caveats:
- 26.0.cil doesn't technically represent 27.0->26.0 map, but rather
current->26.0. We'll fully migrate to the scheme with future releases.
Bug: 67510052
Test: adding new public type only requires changing the latest compat map
Change-Id: Iab5564e887ef2c8004cb493505dd56c6220c61f8
