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Merge "Add /mnt/androidwritable for MOUNT_EXTERNAL_ANDROID_WRITABLE apps" into rvc-dev am: af9240abc9

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Change-Id: Ib58d0ed2351208c84c418388a9b5f021d2302bfb
This commit is contained in:
TreeHugger Robot 2020-04-21 11:25:16 +00:00 • committed by Automerger Merge Worker
commit 93727017ec
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
// bootstrap namespace shares a peer group with /mnt/installer in the
// 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/installer", 0755)) return false;
if (!mkdir_recursive("/mnt/androidwritable", 0755)) 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/androidwritable"))) return false;
// Then, make it shared again - effectively creating a new peer group, that
// will be inherited by new mount namespaces.
if (!(MakeShared("/mnt/installer"))) return false;
if (!(MakeShared("/mnt/androidwritable"))) return false;
bootstrap_ns_fd.reset(OpenMountNamespace());
bootstrap_ns_id = GetMountNamespaceId();