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android_system_core
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Add /mnt/androidwritable for MOUNT_EXTERNAL_ANDROID_WRITABLE apps 

Bug: 153540919
Test: Able to boot without errors
Change-Id: If206e5e3d76a7919b7468bc2d9666b3aff296b3b
Merged-In: If206e5e3d76a7919b7468bc2d9666b3aff296b3b
This commit is contained in:
Ricky Wai 2020-04-21 12:16:43 +01:00
parent 126b010f15
commit a4c163d734
1 changed files with 7 additions and 1 deletions
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8
init/mount_namespace.cpp
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@ -240,14 +240,20 @@ bool SetupMountNamespaces() {
// slave to the /mnt/user mount, and at the same time /mnt/installer in the // slave to the /mnt/user mount, and at the same time /mnt/installer in the
// bootstrap namespace shares a peer group with /mnt/installer in the // bootstrap namespace shares a peer group with /mnt/installer in the
// default namespace. // default namespace.
// /mnt/androidwritable is similar to /mnt/installer but serves for
// MOUNT_EXTERNAL_ANDROID_WRITABLE apps.
if (!mkdir_recursive("/mnt/user", 0755)) return false; if (!mkdir_recursive("/mnt/user", 0755)) return false;
if (!mkdir_recursive("/mnt/installer", 0755)) return false; if (!mkdir_recursive("/mnt/installer", 0755)) return false;
if (!mkdir_recursive("/mnt/androidwritable", 0755)) return false;
if (!(BindMount("/mnt/user", "/mnt/installer", true))) return false; if (!(BindMount("/mnt/user", "/mnt/installer", true))) return false;
// First, make /mnt/installer a slave bind mount if (!(BindMount("/mnt/user", "/mnt/androidwritable", true))) return false;
// First, make /mnt/installer and /mnt/androidwritable a slave bind mount
if (!(MakeSlave("/mnt/installer"))) return false; if (!(MakeSlave("/mnt/installer"))) return false;
if (!(MakeSlave("/mnt/androidwritable"))) return false;
// Then, make it shared again - effectively creating a new peer group, that // Then, make it shared again - effectively creating a new peer group, that
// will be inherited by new mount namespaces. // will be inherited by new mount namespaces.
if (!(MakeShared("/mnt/installer"))) return false; if (!(MakeShared("/mnt/installer"))) return false;
if (!(MakeShared("/mnt/androidwritable"))) return false;
bootstrap_ns_fd.reset(OpenMountNamespace()); bootstrap_ns_fd.reset(OpenMountNamespace());
bootstrap_ns_id = GetMountNamespaceId(); bootstrap_ns_id = GetMountNamespaceId();